阅读说明：本技术 不正当检测机构、纸张输送装置以及纸张处理装置 (Fraud detection mechanism, paper transport device, and paper processing device ) 是由 原口孝平 于 2018-10-09 设计创作，主要内容包括：一种具备不正当检测和抽取防止用开闭构件的不正当检测机构,在将开闭构件以初始旋转姿势停止时防止由于由电动机的惯性力引起的越程而使停止位置偏移。具备：开闭构件(50),其在处于初始旋转姿势时允许上述纸张通过,并且在处于偏离该初始旋转姿势的非初始旋转姿势时阻止上述纸张通过；旋转构件(70),其与开闭构件一体旋转；驱动构件(90),其被轴支承为能够与开闭构件相对旋转；以及驱动传递机构(100),驱动传递机构具备：至少一个被驱动片,其设置于旋转构件；至少一个驱动片,其设置于上述驱动构件且断续地旋转驱动旋转构件；以及缓冲构件(101),其向使被驱动片与上述驱动片远离的方向施力。(An irregularity detection mechanism having an irregularity detection and extraction prevention opening/closing member, which prevents a stop position from being shifted due to overrun caused by an inertial force of a motor when the opening/closing member is stopped in an initial rotation posture. The disclosed device is provided with: an opening/closing member (50) that allows the paper to pass therethrough when in an initial rotation posture and prevents the paper from passing therethrough when in a non-initial rotation posture that is different from the initial rotation posture; a rotating member (70) which rotates integrally with the opening/closing member; a drive member (90) which is pivotally supported so as to be rotatable relative to the opening/closing member; and a drive transmission mechanism (100) provided with: at least one driven piece provided to the rotating member; at least one driving piece which is provided to the driving member and intermittently rotationally drives the rotating member; and a buffer member (101) which is urged in a direction in which the driven piece is separated from the driving piece.)

1. An irregularity detecting mechanism for detecting whether or not an irregularity means is attached to a sheet being conveyed, comprising:

an opening and closing member that allows the paper to pass therethrough when in an initial rotation posture and prevents the paper from passing therethrough when in a non-initial rotation posture that deviates from the initial rotation posture;

a rotating member that rotates integrally with the opening/closing member;

a driving member for driving the opening/closing member, which is disposed opposite to the rotating member and is axially supported so as to be rotatable relative to the rotating member; and

a drive transmission mechanism that transmits a driving force from the driving member to the rotating member,

the drive transmission mechanism includes:

at least one driven piece provided to the rotating member;

at least one driving piece provided to the driving member and intermittently rotationally driving the rotating member by directly or indirectly pressing the driven piece in a process of relative rotational movement with respect to the driven piece; and

and a buffer member that urges the driven piece in a direction away from the driving piece.

2. The fraud detection mechanism according to claim 1, wherein:

the driving pieces and the driven pieces have a non-interference radial positional relationship, one of the two driven pieces having different circumferential positions pressurizes the buffer member arranged between the two driving pieces having different circumferential positions between the one driving piece, and the other of the two driven pieces pressurizes the buffer member between the other driving piece.

3. The fraud detection mechanism according to claim 2, wherein:

the driving member includes an interference type driving piece that directly presses the driven piece.

4. The fraud detection mechanism according to claim 1, wherein:

the driving piece and the driven piece have a non-interference radial position relationship, one of the two driving pieces having different circumferential positions pressurizes the buffer member arranged between the two driven pieces having different circumferential positions between the one driven piece, and the other driving piece pressurizes the buffer member between the other driven piece.

5. The fraud detection mechanism according to claim 4, wherein:

the rotating member includes a third driven piece directly pressed by the driving piece.

6. The fraud detection mechanism according to claim 1, wherein:

the buffer member is disposed between the one driven piece and the one driving piece, and is compressed between the one driving piece and the one driven piece when the driving member rotates, and is directly contacted with the one driven piece and pressed in a rotating direction.

7. The fraud detection mechanism according to claim 1, wherein:

the drive transmission mechanism includes:

two driven pieces arranged at different circumferential positions on the rotating member; and

two of the driving pieces disposed at different circumferential positions on the driving member and in a radial positional relationship not interfering with the driven pieces,

the buffer member is disposed between the two driven pieces, and is compressed between one of the driving pieces and one of the driven pieces and biases the one driven piece in the normal rotation direction when the driving member is rotated in the normal rotation direction, and is compressed between the other of the driving pieces and the other of the driven pieces and biases the other of the driven pieces in the reverse rotation direction when the driving member is rotated in the reverse rotation direction.

8. The fraud detection mechanism according to claim 1, wherein:

the drive transmission mechanism includes: two driven pieces arranged at different circumferential positions on the rotating member; and

two of the driving pieces disposed at different circumferential positions on the driving member and in a radial positional relationship not interfering with the driven pieces,

the buffer member is disposed between the two driving pieces, and is compressed between one of the driving pieces and one of the driven pieces and biases the one driven piece in the normal rotation direction when the driving member rotates in the normal direction, and is compressed between the other driving piece and the other driven piece and biases the other driven piece in the reverse rotation direction when the driving member rotates in the reverse direction.

9. The fraud detection mechanism according to claim 1, wherein:

the drive transmission mechanism includes:

two driven pieces and a third driven piece, which are arranged on the rotating member with different circumferential positions; and

two of the driving pieces disposed at different circumferential positions on the driving member and in a positional relationship not interfering with the two driven pieces but interfering with the third driven piece,

one driving piece contacts with and presses the third driven piece during forward rotation, the other driving piece contacts with and presses the third driven piece during reverse rotation,

the buffer member is disposed between the two driven pieces, and is compressed between one of the driving pieces and one of the driven pieces and urges the one driven piece in the normal rotation direction when the driving member rotates in the normal rotation direction, and is compressed between the other of the driving pieces and the other of the driven pieces and urges the other of the driven pieces in the normal rotation direction when the driving member rotates in the reverse rotation direction.

10. The fraud detection mechanism according to claim 1, wherein:

the drive transmission mechanism includes:

two driven pieces arranged at different circumferential positions on the rotating member;

two driving pieces disposed at different circumferential positions on the driving member and in a positional relationship not interfering with the two driven pieces; and

a third driving plate in a positional relationship of interference with each driven plate,

the third driving piece is contacted with one driven piece and presses the driven piece when the driving component rotates forwards, and the third driving piece is contacted with the other driven piece and presses the driven piece when the driving component rotates backwards,

the buffer member is disposed between the two driving pieces, and is compressed between the one driving piece and the other driven piece and urges the other driven piece in the normal rotation direction when the driving member is rotated in the normal rotation direction, and is compressed between the other driving piece and the one driven piece and urges the one driven piece in the reverse rotation direction when the driving member is rotated in the reverse rotation direction.

11. The malfunction detection mechanism according to any one of claims 1 to 10, comprising:

an irregularity prevention motor that drives the driving member;

a rotation posture detection mechanism that detects whether the opening/closing member is in an initial rotation posture; and

a control means for controlling the malfunction prevention motor,

the control means closes the malfunction prevention motor when the rotational posture detection means detects that the opening/closing member is in the initial rotational posture.

12. A sheet conveying apparatus characterized by:

the device is provided with the fraud detection mechanism according to any one of claims 1 to 11.

13. A sheet processing apparatus characterized by:

the paper sheet conveying device according to claim 12.

Technical Field

The present invention relates to a fraud detection mechanism, a paper transport apparatus, and a paper processing apparatus that detect and prevent a fraud in which a banknote is taken out by a drawing means such as a string or a belt connected to the banknote during execution.

Background

In various banknote handling apparatuses such as banknote deposit machines, various vending machines, and change machines, banknotes in which an improper means for withdrawing a string material such as a fishing line or a string, a tape, or the like, which is difficult to detect by a sensor, is incorporated into the apparatus from an insertion slot, and the improper means is pulled back and collected into the insertion slot at the time when the banknote identification process is completed, thereby performing an act of providing improper reception of articles or services.

Patent document 1 discloses the following technique: a paper money discriminating device in which a rotary body having a slit is arranged in a paper money conveying path, the slit opens a passage to allow paper money to pass therethrough when the slit is in an initial rotation posture (home position), and cuts the passage to prevent paper money from passing therethrough when the slit is in a posture deviating from the initial rotation posture, the paper money discriminating device being capable of reliably detecting that paper money equipped with an improper means such as a wire rod has passed through the slit, and further preventing damage to the rotary body or a rotary drive device of the rotary body caused by an inertial force of a motor when the rotary body is stopped in the initial rotation posture.

In patent document 1, a gear is attached to a rotating body having a slit so as to be coaxial and rotatable relative to the rotating body, and a protrusion provided on the gear presses a protrusion-shaped coupling portion provided on the rotating body, thereby rotationally moving the rotating body that is not in an initial rotational posture toward the initial rotational posture. When the rotating body is stopped at the time point when it is detected that the rotating body has reached the initial rotation posture, a gap, which is a deceleration section, is formed between the coupling portion of the rotating body and the protrusion of the gear. Therefore, after the connection portion is stopped, the protrusion of the gear rotates while decelerating until the deceleration section disappears, and the impact force at the time of contact with the connection portion is relaxed, so that the rotary body and the rotary drive device of the rotary body are prevented from being damaged, and the slit can be reliably positioned in the initial rotation posture (the overrun can be prevented) when the rotary body is stopped.

However, actually, due to variations in component accuracy or the like of each device, a common optimal deceleration section is not formed in all the devices, and when the deceleration section is excessively small, the protrusions of the gear may be further pressed after coming into contact with the coupling portion of the rotating body, and may be displaced (overrun) to a rotational position beyond the initial rotational posture. That is, if the deceleration sections of all the devices are set to be the same, it is difficult to perform control for stopping the gear at an accurate position and timing, and it is difficult to find and adjust and set an optimal deceleration section for each device.

When the overtravel of the rotating body occurs, the gear needs to be reversed by the overtravel amount to return to the initial rotation posture in order to prevent paper jam in conveying the paper money, but when a high level of about 50 ten thousand times of operation is required as the endurance specification value of the motor, the reversal is repeated every time one paper money passes, which not only causes a significant reduction in the endurance of the motor, but also causes a long total processing time. Further, although it is possible to perform PWM control of the stop position and stop timing of the projection so as not to press the coupling portion of the rotating body too much by the projection of the gear after the rotating body is stopped in the initial rotation posture, this is not practical because it causes a problem such as a long processing time and a reduction in processing speed.

The differences between patent document 1 and the present invention are explained in further detail in the description of the embodiments.

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide: an irregularity detection mechanism includes an irregularity detection and prevention opening/closing member that is provided in a paper conveyance path and allows or prevents passage of banknotes by changing a rotation posture, and prevents withdrawal by an irregularity means fixed to the paper after completion of recognition, and prevents a stop position from being displaced due to overrun caused by an inertial force of a motor when the opening/closing member is stopped in an initial rotation posture.

Thus, the deviation of the stop position of the opening/closing member can be effectively prevented, and therefore, the problems of the reduction of durability caused by the reverse rotation of the motor for correcting the positional deviation and the prolongation of the processing time caused by the complicated control can be solved.

Means for solving the problems

In order to achieve the above object, a fraud detection mechanism according to the present invention is a fraud detection mechanism for detecting whether or not a fraud is attached to a sheet being conveyed, the fraud detection mechanism including: an opening/closing member that allows the paper to pass therethrough when the opening/closing member is in an initial rotation posture (initial rotation angle) and prevents the paper from passing therethrough when the opening/closing member is in a non-initial rotation posture that is different from the initial rotation posture; a rotating member that rotates integrally with the opening/closing member; a driving member for driving the opening/closing member, which is disposed opposite to the rotating member and is axially supported so as to be rotatable relative to the rotating member; and a drive transmission mechanism that transmits a driving force from the driving member to the rotating member, the drive transmission mechanism including: at least one driven piece provided to the rotating member; at least one driving piece provided to the driving member and intermittently rotationally driving the rotating member by directly or indirectly pressing the driven piece in a process of relatively rotationally moving with respect to the driven piece; and a buffer member that urges the driven piece in a direction away from the driving piece.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the irregularity detecting means is provided with the irregularity detection and extraction prevention opening/closing member, and prevents the stopping position from being shifted due to the overrun caused by the inertial force of the motor when the opening/closing member is stopped in the initial rotation posture.

Drawings

Fig. 1(a) is a vertical cross-sectional view showing an internal structure of a banknote transport device including a fraud detection mechanism according to the present invention, and (b) and (c) are enlarged views of main portions showing a transport path closed by an opening/closing member.

Fig. 2(a), (b), and (c) are a front view showing an example of the irregularity prevention mechanism, a front view showing an assembled state of the rotation member and the rotation posture detection mechanism, and a front view showing a state in which a part of the drive gear and the buffer member are added to (b).

Fig. 3(a) to (d) are explanatory views showing the structure of the opening and closing member, perspective views, (a) right side view (with a cushion member), and (a) a-a sectional view.

Fig. 4(a) and (b) are a perspective view and a side view of the inner side face of the drive gear.

Fig. 5(a) to (f) are explanatory views of the operation procedure of the opening/closing member in the irregularity prevention mechanism in the normal rotation.

Fig. 6(a) to (f) are explanatory views of the operation procedure when the opening and closing member in the fraud prevention mechanism is reversed.

Fig. 7(a) to (f) are comparative diagrams showing problems in a configuration in which the driven piece is directly driven by the driving piece.

Fig. 8 is a block diagram of the control mechanism.

Fig. 9 is a flowchart showing a control procedure of the fraud detection and fraud prevention operation in the fraud prevention mechanism.

Fig. 10 is a timing chart showing operations of the exit sensor, the malfunction prevention motor, and the home position detection sensor.

Fig. 11 is a flowchart showing an operation procedure for rotating the opening/closing member n times.

Fig. 12(a), (b), and (c) are a front view showing an example of the irregularity prevention mechanism of the second embodiment, a front view showing an assembled state of the rotation member and the rotation posture detection mechanism, and a front view showing a state in which a part of the drive gear and the buffer member are added to (b).

Fig. 13(a) to (d) are explanatory views showing the structure of the opening and closing member, perspective views, (a) right side view (with a cushion member), and (a) B-B sectional views.

Fig. 14(a) and (b) are a perspective view and a side view of the inner side surface of the drive gear.

Fig. 15(a) to (f) are explanatory views of the operation procedure in the normal rotation of the opening/closing member in the irregularity prevention mechanism according to the second embodiment.

Fig. 16(a) to (f) are explanatory views of the operation procedure when the opening/closing member in the fraud prevention mechanism of the second embodiment is reversed.

Fig. 17(a), (b), and (c) are a front view showing an example of the fraud prevention mechanism of the third embodiment, a front view showing an assembled state of the rotation member and the rotation posture detection mechanism, and a front view showing a state in which a part of the drive gear and the buffer member are added to (b).

Fig. 18(a) to (d) are explanatory views showing the structure of the opening and closing member, perspective views, (a) right side view, and (a) C-C sectional view.

Fig. 19(a), (b), and (c) are perspective views, side views, and side views of the inner side surface of the drive gear, and the belt buffering member.

Fig. 20(a) to (f) are explanatory views of the operation procedure in the normal rotation of the opening/closing member in the third embodiment.

Fig. 21(a) to (f) are explanatory views of the operation procedure when the opening/closing member of the third embodiment is reversed.

Fig. 22(a), (b), and (c) are a front view showing an example of the fraud prevention mechanism of the fourth embodiment, a front view showing an assembled state of the rotation member and the rotation posture detection mechanism, and a front view showing a state in which a part of the drive gear and the buffer member are attached to (b).

Fig. 23(a) to (D) are explanatory views showing the structure of the opening and closing member, perspective views, (a) right side view (with a cushion member), and (a) D-D sectional views.

Fig. 24(a) and (b) are a perspective view and a side view of the inner side surface of the drive gear.

Fig. 25(a) to (f) are explanatory views of the operation procedure in the normal rotation of the opening/closing member in the irregularity prevention mechanism according to the fourth embodiment.

Fig. 26(a) to (f) are explanatory views of the operation procedure of the opening/closing member in the fraud prevention mechanism of the fourth embodiment when it is reversed.

Fig. 27(a), (b), and (c) are a front view showing an example of the fraud prevention mechanism of the fifth embodiment, a front view showing an assembled state of the rotation member and the rotation posture detection mechanism, and a front view showing a state in which a part of the drive gear and the buffer member are added to (b).

Fig. 28(a) to (d) are explanatory views showing the structure of the opening and closing member, perspective views, (a) right side view, and (a) E-E sectional views.

Fig. 29(a), (b), and (c) are perspective views, side views, and side views of the inner side surface of the drive gear with the addition of the buffer member.

Fig. 30(a) to (f) are explanatory views of the operation procedure in the normal rotation of the opening/closing member in the fraud prevention mechanism of the fifth embodiment.

Fig. 31(a) to (f) are explanatory views of an operation procedure when the opening/closing member of the fifth embodiment is reversed.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings.

However, the constituent elements, types, combinations, shapes, relative arrangements thereof, and the like described in the following embodiments are not intended to limit the scope of the present invention to these, and are merely illustrative examples, unless otherwise specified.

[ paper money conveying device ]

Fig. 1(a) is a vertical cross-sectional view showing an internal structure of a banknote transport device including a fraud detection mechanism according to the present invention, and (b) and (c) are enlarged views of main portions showing a transport path closed by an opening/closing member. Further, (b) shows a state in which the conveying path is cut, and (c) shows a state in which the opening and closing member is rotated and the improper means is wound.

Note that, in this example, although the banknote is shown as an example of the paper, the present apparatus can be applied to prevent an illegal act in the conveyance of paper other than the banknote, for example, securities, vouchers, bills, and the like.

The bill transport device (paper transport device) 1 is used by being attached to a bill processing device main body such as a bill depositing machine, various vending machines, and a changer (not shown), and bills received by the bill transport device 1 are received by a recognition sensor to be recognized as genuine or counterfeit bills and denominations, and then are sequentially stored in a cash box in the bill processing device main body one by one.

The banknote transport device 1 includes a lower unit 3 and an upper unit 4 supported openably and closably with respect to the lower unit 3, and forms a banknote transport path (transport path) 10 between facing surfaces of the units when the units are in a closed state as shown in fig. 1.

An inlet 12 for introducing banknotes P is provided at one end of the banknote transport path 10, and an inlet paper feed sensor 14 for banknote detection, an inlet roller pair 16, an optical recognition sensor 18 for reading information for identifying the denomination and authenticity of the banknotes, a relay roller pair 20, a paper feed sensor 22 on the inlet side of the fraud prevention mechanism, a fraud prevention mechanism 24 including a fraud detection opening and closing member, a fraud prevention motor, and the like, a paper feed sensor 26 on the outlet side of the fraud prevention mechanism, an outlet roller pair 28, an outlet paper feed sensor 30, and an outlet 32 are arranged inside the inlet 12 along the transport path 10. Is also provided with: a transport motor 35 that drives the respective roller pairs 12, 16, 20, 28 for transporting bills; and a control means (CPU, MPU, ROM, RAM)200 for judging the denomination and authenticity of the bill based on the identification information from the optical recognition sensor 18, or controlling the transport motor 35 and other control objects based on the bill detection signals from the paper feed sensors and the exit sensors.

The banknotes discharged from the outlet 32 are accommodated in a stacking apparatus not shown.

The above-described configuration of the banknote transport device 1 is merely an example, and various modifications are possible. For example, the number of motors to be used, the arrangement of the roller pairs, the type of the identification sensor, and the like can be variously changed and selected.

Each of the roller pairs 12, 16, 20, and 28 is composed of a driving roller disposed on the lower unit 3 side and a driven roller disposed on the upper unit 4 side, and has a structure in which both sides of the bill are sandwiched and conveyed. The optical recognition sensor 18 is composed of a light emitting element and a light receiving element which are disposed to face each other with the conveyance path 10 therebetween, and is an optical coupler which allows infrared rays generated by the light emitting element to pass through the bill and then receives the light by the light receiving element to recognize an optical pattern (optical characteristic) of the bill. In addition, a magnetic sensor may be used as the identification sensor.

[ mechanism for preventing unauthorized use: first embodiment

< basic Structure >

The fraud prevention mechanism according to the first embodiment will be described with reference to fig. 1 to 11.

Fig. 2(a), (b), and (c) are a front view showing an example of the irregularity prevention mechanism, a front view showing an assembled state of the rotation member and the rotation posture (rotation angle) detection mechanism, and a front view showing a state in which a part of the drive gear and the buffer member are added to (b), fig. 3(a) to (d) are explanatory views and perspective views showing a structure of the opening and closing member, (a) a right side view (with the buffer member), and an a-a sectional view of (a), and fig. 4(a) and (b) are a perspective view and a side view showing an inner side surface of the drive gear. Fig. 5(a) to (f) are explanatory views of an operation procedure in the normal rotation of the opening/closing member in the irregularity prevention mechanism, and fig. 6(a) to (f) are explanatory views of an operation procedure in the reverse rotation of the opening/closing member in the irregularity prevention mechanism.

The fraud prevention mechanism 24 is a fraud detection and prevention mechanism for detecting whether or not a fraud means U for withdrawal is fixed to the banknotes P fed from the inlet 12 and conveyed along the conveyance path 10, and for preventing withdrawal of the banknotes by the fraud means U.

The fraud prevention mechanism 24 includes: an opening/closing member 50 for irregularity detection and prevention, which is provided with a guide slit 52 and is pivotally supported so as to be rotatable about a rotation shaft 54 parallel to the guide slit 52, wherein the guide slit 52 has a shutter function of opening a transport path to allow entry and passage of a transported bill when in an initial rotation posture (standby posture) shown in fig. 1(a), and closing all or a part of the transport path to prevent (disable) passage of the bill when in a non-initial rotation posture (fig. 1(b) and (c)) deviated from the initial rotation posture; a rotating member 70 which is a disk having a shaft center portion fixed to one end portion of the rotating shaft 54 of the opening/closing member, has at least one recessed portion 72 at an outer peripheral edge, and rotates integrally with the opening/closing member; a drive gear (drive member) 90 for driving the opening/closing member, which is disposed in proximity to the outer surface of the rotary member, and whose axial center portion is supported by one end portion of the rotary shaft 54 of the opening/closing member so as to be rotatable relative to the rotary member; a drive transmission mechanism 100 that operates to intermittently transmit a driving force from the drive gear to the rotary member 70 at a predetermined timing; an irregularity prevention motor (DC motor) 120 that drives the drive gear; a gear mechanism 130 for transmitting a driving force between the irregularity prevention motor and the drive gear 90; a rotation posture detection mechanism 140 that detects whether the opening/closing member is in an initial rotation posture or not; and a control means 200 for controlling the malfunction prevention motor 120.

The slit 52 has a shape allowing passage of the bill, and is configured to allow smooth passage only when in an initial rotation posture (initial rotation angle), and to prevent passage when the rotation posture is slightly shifted. The slit is not essential, and the conveying path may be opened and closed while the opening and closing member having no slit is rotating itself, or the opening and closing member may be provided with a notch that opens the conveying path only when the opening and closing member is in the initial rotation posture.

The concave-convex portions 56 formed along the longitudinal side edges of the opening-closing member 50 are configured to engage with corresponding concave-convex portions provided on the cover member on the apparatus main body side disposed on the outer diameter side thereof, and a small concave-convex gap is formed between the two concave-convex portions. The concave-convex shaped clearance plays the following roles: when the opening and closing member is rotated in a state where the withdrawing means U fixed to the bills has entered the slit 52, the withdrawing means is easily wound around the outer periphery of the opening and closing member. Further, when the extraction means U is wound around the opening/closing member 50, the extraction means interferes with the rotation of the opening/closing member 50, and therefore, the pulses from the rotary encoders 135 and 137 are abnormal, or the rotation speed is reduced from the rotation speed of the opening/closing member 50 set as the reference value, and it can be determined that the improper action is being performed.

The drive transmission mechanism 100 of the configuration example shown in fig. 2 to 6 includes one driven piece 74 and two driving pieces 92 and 93, and the buffer member 101 has the following characteristic configuration: is disposed in a circumferential gap formed between the driven piece 74 and the first driving piece 92, and biases the driven piece 74 in the normal rotation direction while being compressed between the first driving piece 92 and the driven piece 74.

That is, the drive transmission mechanism 100 includes: at least one driven piece 74, which is a protrusion provided on the outer side surface of the rotating member 70; at least one, in this example, two driving pieces 92 and 93 serving as projections provided on an inner surface (a surface facing the rotary member) of the driving gear 90 and adapted to intermittently (at predetermined timings) rotationally drive the rotary member 70 by directly or indirectly pressing the driven piece in the circumferential direction (normal rotation direction) at predetermined timings during relative rotational movement with respect to the driven piece 74; and a cushioning member (elastic member) 101, which is constituted by a compression spring or the like, and urges the driven piece 74 in a direction away from the first driving piece 92. The drive gear 90 rotates relative to the rotating member 70 within the range of the circumferential gap between the driven piece 74 and each of the driving pieces 92, 93.

In the present embodiment, the first driving piece 92 is configured to press the driven piece 74 indirectly, i.e., via the cushioning member 101, and the second driving piece 93 is configured to press the driven piece 74 directly.

Further, as the cushioning member 101, a plate spring or other various spring members may be used in addition to the helical compression spring, and an elastic member such as rubber or sponge may be used. The cushioning member 101 may be disposed in a free state in a circumferential space between the driving piece 92 and the driven piece 74, or may have one end fixed to the driving piece or the driven piece.

The driven piece 74 is formed by projecting (bending) a part of the inner peripheral surface of the annular convex portion 71a provided along the outer peripheral edge of the outer side surface of the rotary member 70 toward the inner radial side, and in this example, the formation position of the driven piece 74 corresponds to the inner radial side (equivalent circumferential position) of the recessed portion 72. However, the circumferential position of the driven piece 74 need not be on the inner diameter side of the recess 72, and may be any position as long as the operation and behavior of a drive transmission mechanism described later can be achieved.

The annular recessed portion 71c formed between the annular projecting portion 71a and the central projecting portion 71b serves as a space for accommodating the driving pieces 92, 93 of the driving gear and the buffer member when the inner surface of the driving gear is mounted to the outer surface of the rotary member in a face-to-face manner.

As the driving member 90, a pulley may be used instead of the driving gear.

The greatest difference between the present invention and patent document 1 is: the present invention is configured such that the driven piece 74 is not directly in contact with the first driving piece 92, but a buffer member 101 made of a compression spring is interposed between the two pieces. In patent document 1, two driven pieces (coupling portions) are provided at 180-degree intervals on the rotating body, and two driving pieces on the driving gear side are also provided at 180-degree intervals. In contrast, in the present embodiment, one driven piece 74 is provided on the rotary member 70, and two driving pieces (92, 93) are disposed on the surface of the driving gear 90 at 180-degree intervals. The first driving piece 92 located on the upstream side in the normal rotation direction of the drive gear presses and biases the driven piece 74 via the buffer member 101 during normal rotation, and the second driving piece 93 located on the downstream side in the normal rotation direction directly presses and biases the driven piece 74 during reverse rotation of the drive gear.

The control means 200 controls the rotation attitude detection means 140 to turn off the improper prevention motor 120 when the guide slit 52 is detected to be in the initial rotation attitude, and to drive the improper prevention motor in the normal rotation direction and shift the rotation member to the initial rotation attitude via the drive gear when the improper prevention motor is detected to be not in the initial rotation attitude, that is, in the non-initial rotation attitude.

The gear mechanism 130 includes relay gears 132, 133, 134 and the like disposed on a drive transmission path between the output gear 120a of the irregularity prevention motor 120 and the drive gear 90. A pulse plate 135 is fixed to one relay gear 133 in the same axial center shape, and the photo interrupter 137 detects cuts formed at a predetermined pitch along the peripheral edge of the pulse plate and outputs the pulse, whereby the control means counts the outputs per unit time to detect the number of rotations (rotation speed, rotation angle) of the irregularity prevention motor 120 and the drive gear 90. The pulse plate 135 and the photo interrupter 137 constitute a rotary encoder.

Further, since it is difficult for any two gears constituting the gear mechanism 130 to be worm gears including a worm and a worm wheel to perform reverse rotation by driving from the load side, it is difficult for an unauthorized person to use an unauthorized means to reversely rotate the opening and closing member.

The rotation posture detection mechanism 140 includes: a roller (follower member) 142 configured from a rotatable roller that is fitted into the recessed portion 72 and stopped when the guide slit 52 is in the initial rotation posture, and that is detached from the recessed portion 72 and moves along the outer periphery (non-recessed portion) 73 of the rotation member when the guide slit (rotation member) is shifted from the initial rotation posture shown in fig. 1(a) to the non-initial rotation posture shown in fig. 1 (b); a lever 144 which rotatably supports the shaft 142a of the roller via a support portion 144a and swings the roller toward the outer peripheral edge of the rotary member along a plane orthogonal to the rotary shaft 54 around a shaft portion 144b provided in another portion; a lever urging elastic member (torsion spring) 146 that elastically urges the lever 144 in a direction in which the roller 142 is pressed against the outer peripheral edge of the rotary member; and a home position detection sensor 160 that detects the detected portion 144c provided on the lever only when the roller 142 is completely fitted (dropped) into the recessed portion 72, thereby detecting whether or not the guide slit 52 is in the initial rotational posture.

The lever urging elastic member (lever urging member) 146 is a torsion spring having an annular portion wound around the shaft portion 144b, and one end protruding from the annular portion is locked to a fixed portion of the apparatus body and the other end is locked to an appropriate portion of the lever 144, so that the lever and the roller urge the outer peripheral edge of the rotating member along a rotation locus centered on the shaft portion 144 b.

The roller 142 serving as the follower member is merely an example, and may be a non-rotating structure, as long as it can smoothly move the outer peripheral edge of the rotating member due to a small frictional resistance.

The control mechanism 200 turns off the irregularity prevention motor 120 when the home position detection sensor 160 detects that the guide slit 52 is in the initial rotation posture, and drives the irregularity prevention motor 120 in the normal rotation direction when detecting that the guide slit is in the non-initial rotation posture that is different from the initial rotation posture.

The driving gear (driving member) 90 is configured to rotate relative to the rotating member 70 coaxially coupled thereto, and is configured to drive the rotating member 70 via the driven piece by the first driving piece 92 pressing the driven piece 74 via the buffer member 101 during the normal rotation of the driving gear (fig. 5(a) to (d)). Further, in the process of driving the rotary member in the normal rotation by the drive gear 90, when the roller 142 supported by the lever 144 is fitted into the recessed portion 72 of the rotary member 70 from the outer periphery 73 of the rotary member, the rotary member is rapidly accelerated by the biasing force of the lever biasing member 146 and falls into the recessed portion, and therefore the driven piece 74 is in a circumferential positional relationship with respect to the first driving piece 92 that is previously separated by a desired angle (see fig. 5(e) and (f)).

In other words, when the roller is fitted to the recessed portion, the rotating member 70 is rapidly increased in speed by the force of the lever urging member 146 compared to the rotational speed at the time of being driven by the drive gear so far, and therefore, a gap G1, which is a speed reduction section, is formed between the driven piece 74 and the first driving piece 92 in the circumferential direction.

Further, the rotation member mechanically stops rotating by the roller that has been urged by the spring being fitted in the recessed portion.

The circumferential gap between the driven piece 74 and the first driving piece 92 at the time when the rotating member stops becomes the deceleration section G1 of the driving gear. That is, the home position detection sensor 160 detects the detected portion 144c of the lever at the time when the roller completely falls into the recessed portion, and the control mechanism stops the driving of the fraud prevention motor 120. Therefore, the drive gear 90 (first driving piece 92) continues to rotate within the range of the deceleration section with respect to the rotating member 70 (driven piece 74) that is stopped in the initial rotation posture by the roller locking due to the inertia (remaining potential of the drive gear itself) of the irregularity prevention motor. That is, when the rotation of the fraud prevention motor 120 and the rotation member is stopped, while the drive gear 90 rotates and moves in the deceleration section while compressing the buffer member 101, the inertial force of the drive gear is reduced by the damping action of the buffer member, and the impact force when the driving piece presses the driven piece via the buffer member is relaxed. Due to this cushioning effect, the rotation member locked by the roller urged by the lever urging member 146 can continue to maintain the stopped state in the initial rotation posture while the driving piece is rotationally moved in the deceleration section. Therefore, the opening/closing member 50 is reliably positioned so that the guide slit 52 is in the initial rotational posture for opening the conveying path.

It is apparent that the cushioning member has a function of extending the distance between the driving plate and the driven plate, and therefore the angular range of the deceleration section formed in the case where the cushioning member 101 is present is larger than the deceleration section formed in the case where the cushioning member is not present. By increasing the deceleration section, more surplus deceleration can be performed, and the impact applied to the driven piece can be significantly reduced.

In this example, even if the rotating member is advanced with respect to the drive gear by the momentum when the roller is fitted to the recessed portion, a sufficient width deceleration section can be secured at the previous stage by the expanding force of the buffer member.

Next, with reference to fig. 7 as a comparative diagram, a problem in a case where the driven piece is directly driven by the driving piece (in the case where the cushioning member 101 is not present in the present embodiment) as in patent document 1 will be described.

In fig. 7(a), the guide slit 52 of the opening and closing member 50 is in an initial rotation posture, that is, in an open state (standby state) in which the transported bill P is allowed to pass. In this standby state, the rotation member 70 is stopped by the fraud prevention motor 120.

In the standby state of fig. 7(a), the first driving piece 92 of the driving gear is stopped in direct contact with the driven piece 74.

Next, in the normal rotation starting state of fig. 7(b), when the driving gear 90 presses the rotary member (driven piece 74) to start rotating, the roller is separated from the recessed portion (off position) and is transferred to the outer periphery 73 ((c)).

When the drive gear 90 and the rotary member 70 rotate in the normal direction integrally, the roller moves relatively along the outer periphery of the rotary member, and is fitted (seated) in the recessed portion as shown in (d).

When the seated state shown in fig. 7(d) is achieved, the driving of the fraud prevention motor 120 is stopped, and therefore the first driving piece 92 (driving gear 90) starts decelerating at the position shown in the drawing. That is, the first driving plate 92 is kept in the narrow deceleration range indicated by (d) with the driven plate 74, and the driving force transmission from the motor 120 is interrupted, and thereafter, the rotation in the normal rotation direction is continued by inertia. However, since the deceleration section is extremely short in the normal rotation process, the first driving piece 92 cannot decelerate sufficiently and collides with the driven piece to apply an impact to the driven piece. Therefore, as shown in (e), the recessed portion 72 is in a state of passing over the roller as the rotating member passes by.

When the overrun occurs, the behavior that the roller is separated from the recessed portion immediately after the roller is temporarily fitted to the recessed portion is detected by the home position detection sensor 160, and therefore the control means can recognize the occurrence of the overrun. Therefore, as shown in (f), the motor 120 is immediately reversed, the driven piece 74 is pressed clockwise by the second driving piece 93, and the roller is fitted into the recessed portion again, whereby the overrun can be eliminated.

However, if the fraud prevention motor 120 is reversed and positioned every time an overrun occurs in order to cope with the occurrence of the overrun, the durability of the motor is lowered. That is, the DC motor 120 of the banknote transport device 1 is required to have durability of 50 ten thousand or more rotations even in the normal rotation, and therefore, it is obvious that the durability of the motor is significantly reduced if a reverse rotation operation is further applied thereto.

In this way, when the deceleration section is too small, the drive gear is not sufficiently decelerated with respect to the rotating member in the stopped state, and an overrun may occur.

In the case where a width larger than the width shown in fig. 7(d) can be secured as the deceleration section, if the margin when the first driving piece 92 moving in the deceleration section contacts the driven piece 74 in the stopped state is within the allowable range, the driving gear 90 can be stopped without affecting the stopped state of the rotating member, but if the margin exceeds the allowable range, the driven piece 74 is strongly pushed in against the force of the lever urging member 146. The results were as follows: when the recessed portion 72 is disengaged from the roller, the rotating member cannot maintain the initial rotation posture and is overtravel, and therefore, the guide slit 52 is in the non-initial rotation posture, and the passage of the bill is hindered.

In contrast, in the present invention, the cushioning member 101 is interposed between the two sheets 74, 92, and the driven sheet 74 is pressed by the first driving sheet 92 via the cushioning member 101, so that the deceleration section using the expanding force of the cushioning member can be secured as necessary and sufficiently large, the occurrence of overrun can be greatly reduced, and the reverse rotation is not necessary, so that the durability of the motor can be prevented from being lowered.

The control mechanism 200 drives the fraud prevention motor 120 in the normal direction an arbitrary number of times after the exit sensor 30 confirms that the rear end of the bill has passed and stops the conveyance motor. In the case where the withdrawal means such as a wire is fixed to the bill, since the rear end of the bill passes through the slit and the withdrawal means is left in the guide slit, the opening/closing member 50 can be rotated and wound around the slit, thereby preventing the withdrawal by the withdrawal means. Further, by detecting the abnormal rotation speed of the opening/closing member caused by winding the extraction means around the opening/closing member by the rotary encoders 135 and 137, the presence of the improper behavior can be known, and the occurrence of the alarm can be considered as a trigger. That is, since the extracting means wound around the opening/closing member hinders the rotation of the opening/closing member 50 and reduces the rotation speed, when the reference rotation speed in the normal state without the extracting means or the reference rotation time required to return to the initial rotation posture after n rotations is compared with the actual rotation speed of the opening/closing member or the rotation time required to return to the initial rotation posture, the rotation speed of the opening/closing member is slower than the reference value or the rotation time is longer than the reference time, it can be detected and determined that the opening/closing member is wound with the extracting means.

Further, when the number of rotations of the opening/closing member is always constant after the bill passes through the guide slit, an unauthorized person can know the timing of stopping the rotation and can find the optimum withdrawal timing, and therefore, the rotation number can be made random.

In this example, the guide slit 52 opens the movement path of the banknotes on the transport path when the shutter 50 is in the initial rotation posture in which the introduction of the banknotes is waited, but the improper insertion of the tool from the inlet 2 and the improper withdrawal of the banknotes inside the stacking apparatus can be prevented by adopting the non-initial rotation posture in which the guide slit closes the transport path when the banknotes are on standby.

The control mechanism 200 includes: a discriminating mechanism for receiving the output of the optical recognition sensor 18 to determine whether or not the bill is a true bill, receiving the output of the outlet sensor 30 after determining that the bill is a true bill, continuing to drive the transport motor 35 in the forward direction, and reversing the transport motor 35 to return the bill to the inlet 2 when determining that the bill is not a true bill; and a comparison means for comparing the reference rotation time and/or the reference rotation speed with the actual rotation time and/or the actual rotation speed of the opening/closing member 50 and generating an alarm output when the reference rotation time and/or the reference rotation speed is out of the reference range.

As shown in the block diagram of the control mechanism of fig. 8, the entrance sensor 14, the optical recognition sensor 18, the exit sensor 30, and the home position detection sensor 160 are connected to the respective input terminals of the control mechanism 200. The conveyance motor 35, the fraud prevention motor 120, the rotary encoders 135 and 137, and the alarm 110 are connected to output terminals of the control mechanism 200. The control means 200 can count the output of the rotary encoder per unit time to detect the number of rotations and the rotation speed of the fraud prevention motor 120.

Next, the control procedure of the fraud detection and fraud prevention operation in the fraud prevention mechanism 24 will be described based on the flowchart of fig. 9.

In step 101, the control means (recognition control circuit) 200 waits to detect whether or not a banknote is inserted into the inlet 12. In a standby state before the banknotes are inserted into the inlet 12, the slit 52 of the opening and closing member 50 is held in an initial rotational posture shown in fig. 1(a) in which the upstream side and the downstream side of the transport path 10 communicate with each other. When a banknote is inserted into the inlet 12 provided at one end of the conveyance path 10, the inlet sensor 14 detects the insertion of the banknote and sends an output to the control mechanism 200. Next, in step 102, the control mechanism 200 drives the transport motor 35 to transport the bill along the transport path 10, and in step 103, turns on the optical recognition sensor 18. Subsequently, the bill advances along the conveying path 10 and is conveyed toward the outlet 32 through the slit 52 of the opening and closing member 50.

When the bill moving along the conveyance path 10 passes through the optical recognition sensor 18, the control means 200 receives the output of the optical recognition sensor 18 and determines whether or not the bill being conveyed is a genuine bill, that is, whether or not the bill is genuine (step 104). When the control mechanism 200 determines that the banknote is a genuine banknote based on the optical characteristics of the banknote, it is determined whether the outlet sensor 30 detects the passage of the banknote in step 105. When the exit sensor 30 detects the passage of the bill, the conveyance motor 35 is stopped in step 106. After the bill passes through the exit sensor 30 and the exit 32 and the conveyance motor 35 is stopped, the control mechanism 200 sends an output to the fraud prevention motor 120 to rotate the opening/closing member 50 by n turns in steps 107 and 108, and then stops the fraud prevention motor in step 109. Thus, the determination in step 110 can be performed after the malfunction prevention motor is stopped.

In step 110, the control means 200 determines whether or not the opening/closing member 50 has rotated n turns, and stops the operation of the malfunction prevention motor 120 when the opening/closing member 50 has rotated n turns and the home position detection sensor 160 has detected the detected portion 144c of the lever. The opening-closing member 50 is rotated n rotations to know: after the banknotes are stored in the stacker, whether all the time required from the leaving position to the entering position when the opening and closing member 50 is rotated by n turns is slower than a set reference time (time-out) or whether the number of encoder pulses from the leaving position to the entering position is smaller than a set reference value. In addition, the total time required for n rotations is used for the determination based on the set reference value as an example, and "the time required for 1 rotation × n determinations" may be used.

Further, only the home position detection sensor 160 may be provided without providing the rotary encoder. In this case, the control means monitors only the timeout of the abnormality determination condition, that is, only whether or not all the time required from the leaving position to the entering position when the opening/closing member 50 is rotated by n rotations is slower than the set reference time.

As shown in the timing chart of fig. 10 showing the operations of the exit sensor, the fraud prevention motor, and the home position detection sensor, when the passage of the bill is detected, the exit sensor 30 generates an output, and at the time when the rear end of the bill has completely passed through the exit sensor 30, the fraud prevention motor 120 is biased by the output of the control mechanism 200, and as shown in fig. 5(b) and (c), the driving piece 92 of the driving gear starts to press the driven piece 74 of the rotating member while crushing the buffer member 101, and therefore, the opening/closing member 50 starts to rotate. At this time, as shown in fig. 5(c), the roller 142 moves radially outward of the opening/closing member 50 against the elastic force of the lever urging member 146, and the detected portion 144c of the lever moves away from the home position detection sensor 160, so that the home position detection sensor 160 generates a "1" output. When the opening/closing member 50 further rotates and the roller 142 rotates in front of the recess 72 as shown in fig. 5(d) showing a state immediately before the seating, the roller 142 presses the end of the recess 72 in the normal rotation direction by the elastic force of the lever urging member 146. Therefore, when the roller 142 is fitted in the recess 72 as shown in fig. 5(f) showing the seated state, the opening/closing member 50 and the rotating member 70 operate to rotate earlier than the drive gear 90 to form an angular gap (deceleration section G1) between the drive piece 92 of the drive gear and the driven piece 74 of the opening/closing member as shown in fig. 5 (f). However, in the present embodiment, since the cushion member 101 is disposed to operate in a direction in which the driving piece 92 and the driven piece 74 are separated from each other, a sufficient gap (deceleration section) G1 as a deceleration section is already formed at the stage of fig. 5(a) and (e). Therefore, it is not necessary to expect the advance rotation of the rotating member by the fitting of the roller to the recessed portion and the formation of a minute deceleration section by the advance rotation. The gap formed in the absence of the cushioning member 101 as a deceleration section is maintained within an extremely narrow angular range as described in fig. 7.

In the seated state shown in fig. 5(f), as shown in (4) of fig. 10, the output of the home position detection sensor 160 changes from "1" to "0", and therefore the operation of the fraud prevention motor 120 is stopped. Therefore, the inertial force of the irregularity prevention motor 120 and the gear mechanism 130 generated after the operation of the irregularity prevention motor 120 is stopped is weakened while the driving piece 92 moves while compressing the cushion member 101 in the deceleration section G1. Further, due to the presence of the cushioning member 101, as shown in fig. 5(e) and (f), the state in which the wide deceleration section G1 is left without the driving piece 92 directly abutting against the driven piece 74 can be maintained, and therefore, the opening/closing member 50 can be reliably shifted to and held in the initial rotational posture shown in fig. 5(a) without strong impact being applied to the driven piece 74 by the driving piece 92. In this way, the opening-closing member 50 is reliably positioned in the initial rotational posture in which the slit 52 of the opening-closing member 50 is aligned with the conveying path 10.

When the extracting means U such as a string, a thread, or a belt is connected to the genuine banknotes that have passed through the outlet 32, the extracting means extends in the transport path 10 and the slit 52 of the opening/closing member 50, and therefore, when the opening/closing member 50 rotates n times in steps 107 and 108, the extracting means U is wound around the outer periphery of the opening/closing member 50 while being held in a small clearance formed between the concave/convex portion 56 of the opening/closing member 50 and the concave/convex portion on the apparatus main body side. Since the extraction means is wound around the outer periphery of the opening/closing member 50, the extraction means interferes with the rotation of the opening/closing member 50, and thus, an abnormality occurs in the pulse obtained from the pulse plate 135 constituting the rotary encoder or the rotation speed of the opening/closing member 50 is reduced from the set reference value. Therefore, when the time required for the opening and closing member to rotate n revolutions (the total time required for the opening and closing member to rotate n revolutions) is slower than the set reference value (time-out) or when the encoder pulse rate during the opening and closing member rotation n revolutions is smaller than the set reference value in step 110, the control means 200 determines that the bill is connected to the drawing means, and transmits an alarm signal to the alarm 110 to operate the alarm 110 in step 125, and then ends. The extraction means wound around the outer periphery of the opening/closing member 50 can remove the opening/closing member 50 by rotating the opening/closing member 50 after opening the upper unit 4. In step 110, when the time required for the opening/closing member to rotate n rotations is within the set reference value or when the number of encoder pulses during the opening/closing member to rotate n rotations is within the set reference value, the control means 200 determines that the drawing means is not connected to the banknote, and the process proceeds to step 111, where the control means 200 determines whether or not the outlet sensor 30 is open. If the paper money is accommodated in the stacking apparatus, the outlet sensor 30 is maintained in a closed state, and in the case where the paper money is withdrawn by the withdrawing means, the outlet sensor 30 is opened since the paper money passes through the outlet sensor 30 in a reverse direction. When the outlet sensor 30 is in the open state at step 111, it is determined that the banknotes are extracted by the extracting means, and an alarm signal is generated at step 125. When the exit sensor 30 is in the closed state in step 111, the banknotes are stored in the stacking apparatus in step 112, and the process ends.

If the control means 200 determines that the bill is not a genuine bill in step 104, the conveyance motor 35 is stopped and then reversed in steps 120 and 121, and the bill is retracted into the inlet 12.

When the inlet sensor 14 is turned off in step 122, the control mechanism 200 stops the driving of the conveyance motor 35 (step 123), completes the discharge of the banknotes (step 124), and ends.

The control procedure of the fraud detection and the fraud prevention operation in the fraud prevention mechanism 24 described in fig. 9 is common to all the following embodiments, and therefore, the following embodiments will not be described in detail.

< operation of the fraud prevention mechanism of the first embodiment >

Next, a rotation posture control procedure of the opening/closing member in the fraud prevention mechanism 100 according to the first embodiment will be described with reference to fig. 5, 6, and 11.

Fig. 5(a) to (f) are explanatory diagrams showing a rotation posture control procedure of the opening/closing member when the malfunction prevention motor of the malfunction prevention mechanism of the first embodiment is rotated in the normal direction. Fig. 11 is a flowchart showing an operation procedure of rotating the opening/closing member n times, and is a subroutine corresponding to step 108 of the flowchart of fig. 9.

In fig. 5(a), the guide slit 52 of the opening and closing member 50 is in an initial rotation posture, that is, in an open state (standby state) in which the banknotes P conveyed along the longitudinal direction on the conveying path 10 are allowed to pass smoothly. In this standby state, the home position detection sensor 160 detects the detected portion 144c of the lever, and therefore the malfunction prevention motor 120 is stopped, and the roller 142 supported by the lever 144 biased by the lever biasing member 146 is completely fitted in the recessed portion 72 of the rotary member, and therefore the rotary member 70 stops rotating. At this time, step 130 in fig. 11 is yes, and it is detected that the opening/closing member is in the initial rotation posture.

In the standby state of fig. 5(a), the first driving piece 92 of the driving gear (driving member) 90 is stopped in a state of being engaged with one end of the driven piece 74 via the buffer member 101. At this time, as shown in the drawing, the cushioning member 101 is compressed between the driven piece and the first driving piece by a predetermined force, but a repulsive force of a degree to separate the roller 142 from the recessed portion is not generated.

Next, in the normal rotation starting state (step 131) of (b), the control mechanism 200 starts the normal rotation of the irregularity prevention motor 120, and therefore, the drive gear 90 starts rotating earlier than the rotating member in the stopped state, and the buffer member 101 is strongly compressed. When the compressed state of the cushioning member 101 exceeds a predetermined limit, the pressing force transmitted from the driving piece to the driven piece via the cushioning member increases, and therefore, the rotating member starts rotating against the urging force of the lever urging member 146. When the rotary member starts to rotate, the recess 72 starts to rotationally move relative to the roller 142, and as shown in the sequence of (c) and (d), the roller is displaced in the outer diameter direction to disengage from the recess (unseat), is transferred to the outer peripheral edge 73, and continues relative movement along the outer peripheral edge.

The rotational posture detection means 140 continues to detect whether or not the opening/closing member is returned to the initial rotational posture during this period (step 132).

After the roller is disengaged from the recess, as shown in (d) and (e), the cushioning member 101 is in a state of being released from the pressure from the drive gear and being expanded. That is, the rotating member rotates ahead of the driving gear by the biasing force of an appropriate strength when the cushion member is expanded, and a deceleration section G1 in a sufficient angular range necessary for deceleration is formed between the driven piece 74 and the driving piece 92.

When the drive gear 90, the expanded buffer member 101, and the rotary member 70 continue to rotate in the normal direction as a unit, the roller rotates and moves relatively along the outer peripheral edge of the rotary member, and the state shown in (e) is achieved immediately before the fitting (seating) into the recessed portion shown in (f) is performed. In the present embodiment, unlike the configuration example shown in fig. 7 in which the cushion member is not present, the distance between the driven piece 74 and the driving piece 92 is sufficiently expanded by the expanding force of the cushion member 101, and therefore, a small-width deceleration section formed by increasing the speed when the roller is fitted in the recessed portion after (e) is not necessary.

Further, since the deceleration section G1 can be secured wide before the roll is set in place without depending on the behavior of the roll when it is fitted into the recessed portion, even if the drive gear is rotated at high speed, smooth rotation without overrun and a return operation to the initial rotational position can be realized. Therefore, the fraud prevention mechanism suitable for high-speed processing can be constructed.

When the seated state shown in (f) is achieved, the driving force transmission to the drive gear 90 is interrupted by stopping the driving of the improper drive-preventing motor 120, and therefore the first driving piece 92 of the drive gear starts decelerating at the position shown in the drawing. That is, the first driving plate is kept in the large deceleration section G1 indicated by the angle θ 1 in (f) with the driven plate, and the driving force transmission from the motor 120 is interrupted, so that the first driving plate continues to rotate in the normal rotation direction by inertia thereafter. In this normal rotation, the first driving piece 92 compresses the cushioning member while slowly decelerating due to the cushioning effect of the squashing of the cushioning member 101, and can be stopped without applying an impact to the driven piece. In this way, the circumferential length of the deceleration section G1 formed at the time when the motor 120 is stopped can be made a necessary and sufficient length, and the shock-absorbing action of the shock-absorbing member is exerted, so that the driven piece 74 can be prevented from being pressed with excessive force and overshooting can be prevented.

By eliminating the overtravel of the rotating member, the guide slit 52 of the opening/closing member 50 can always be stopped in the initial rotation posture, and the risk of paper jam of the paper money newly conveyed on the conveying path can be eliminated. Further, since the overrun removing operation performed by reversing the motor 120 is not necessary, it is possible to prevent a decrease in the processing speed and prevent a decrease in the durability of the driving member such as the motor.

Next, fig. 6(a) to (f) are explanatory diagrams showing a reverse operation procedure of the drive transmission mechanism of the first embodiment.

The drive transmission mechanism 100 is configured to take up the illicit means U by rotating the opening/closing member 50 in the normal direction (counterclockwise) as shown in fig. 5 as a basis for illicit detection and illicit prevention, but there is a possibility that the illicit means is wound up when the opening/closing member is rotated in the reverse direction (clockwise) in the same banknote transport device 1 in accordance with the user's request.

In fig. 6(a), the guide slit 52 of the opening-closing member 50 is in the initial rotation posture. In this standby state, the home position detection sensor 160 detects the detected portion 144c of the lever, and therefore the rotation member 70 stops rotating because the malfunction prevention motor 120 stops and the roller 142 completely fits into the recess 72.

Further, in the standby state of fig. 6(a), the second driving piece 93 of the driving gear is in a position of contact with the driven piece 74, while the first driving piece 92 is in a position of being away from the cushioning member 101.

Next, when the reverse rotation irregularity prevention motor 120 is started, the second driving piece 93 of the driving gear 90 starts to press the driven piece 74 in the stopped state in the reverse rotation direction (clockwise direction), and the roller 142 is separated (dislocated) from the recessed portion 72 and is transferred to the outer peripheral edge 73 as in (b).

By further continuing the reverse rotation, the roller is just about to fit (set) in the concave portion in the stage (c).

In (d), the roller is further reversely rotated to be positioned in the recessed portion, and the driving force transmission to the driving gear 90 is interrupted by stopping the driving of the improper prevention motor 120. When the roller is seated in the recessed portion, the roller presses one end portion of the recessed portion in the reverse direction by the urging force of the lever urging member 146. Therefore, only the rotating member sharply increases the speed and the roller sharply engages with the recess, and the driven piece is separated from the second driving piece, so that the second driving piece starts to decelerate from the separated position. That is, since the second driving plate is disconnected from the transmission of the driving force from the motor 120 in a state where the deceleration section G2 indicated by the angle θ 2 remains between the second driving plate and the driven plate, the second driving plate continues to rotate in the reverse direction by inertia thereafter. When the second driving piece 93 is not pushed and dislocated by an excessive force against the driven piece 74, the reverse operation is terminated. In the reverse rotation operation, the buffer member 101 does not play a particular role.

However, since the deceleration section G2 is extremely short, if sufficient deceleration cannot be performed in the reverse rotation process, the overrun occurs as in (e). In particular, since the cushioning member 101 is not present between the second driving piece 93 and the driven piece 74, the occurrence rate of overrun is high. When the overrun has occurred, as shown in (f), the driving gear 90 is rotated in the normal direction by the irregularity prevention motor, so that the driven piece 74 is rotated in the normal direction by the first driving piece 92 via the buffer member 101, and the normal rotation is stopped at the time when the roller is positioned in the recessed portion.

As a countermeasure for preventing the overrun in the reverse rotation, a second buffer member may be disposed between the second driving piece 93 and the driven piece 74. With this configuration, the deceleration section θ 2 formed at the time when the irregularity prevention motor is stopped can be increased, and even if the second driving piece presses the second damper member with an excessive force, the damping action is not transmitted to the driven piece, and the occurrence of overrun can be prevented.

By eliminating the overtravel of the rotating member at the time of reverse rotation, the guide slit 52 of the opening/closing member 50 can be always stopped in the initial rotation posture, and the risk of occurrence of paper jam can be eliminated. Further, since the overrun canceling operation performed by rotating the motor 120 in the normal direction is not necessary, it is possible to prevent a decrease in the processing speed and a decrease in the durability of the driving member such as the motor.

[ mechanism for preventing unauthorized use: second embodiment

< basic Structure >

The fraud prevention mechanism according to the second embodiment will be described with reference to fig. 12 to 16.

Fig. 12(a), (B), and (c) are a front view showing an example of the irregularity prevention mechanism of the second embodiment, a front view showing an assembled state of the rotation member and the rotation posture detection mechanism, and a front view showing a state where a part of the drive gear and the buffer member are added to (B), fig. 13(a) to (d) are explanatory views and perspective views showing a structure of the opening and closing member, (a) a right side view (with the buffer member), and a B-B sectional view of (a), and fig. 14(a) and (B) are a perspective view and a side view of an inner side surface of the drive gear. Fig. 15(a) to (f) are explanatory views of an operation procedure in the normal rotation of the opening/closing member in the irregularity prevention mechanism, and fig. 16(a) to (f) are explanatory views of an operation procedure in the reverse rotation of the opening/closing member in the irregularity prevention mechanism.

Note that the same portions as those in the first embodiment are denoted by the same reference numerals, and redundant description of the configuration and operation is omitted. That is, the fraud prevention mechanism of the second embodiment is substantially the same as that of the first embodiment except for the configuration of the drive transmission mechanism 100.

That is, the gear mechanism 130, the rotation posture detection mechanism 140, and the control mechanism 200 have the same configuration, function, and operation as those of the first embodiment.

The fraud prevention mechanism 24 is a fraud detection and prevention mechanism for detecting whether or not the fraud means U for withdrawal is fixed to the banknotes inserted from the inlet 12 and transported along the transport path 10, and for preventing the banknotes from being withdrawn by the fraud means U.

The fraud prevention mechanism 24 of the second embodiment differs from that of the first embodiment in the structure of the drive transmission mechanism 100, in particular, the structure of the driven pieces 75 and 76 provided on the rotary member 70, the structure of the driving pieces 92 and 93 provided on the drive gear 90, the arrangement of the buffer member 101, and the like. In particular the following characteristic structure: since the driven pieces 75 and 76 and the driving pieces 92 and 93 are displaced from each other in the radial positional relationship, the two pieces do not interfere (contact) with each other during the relative rotation, and each driving piece is pressed only by contacting the buffer member 101 held between the two pairs of driven pieces.

That is, the drive transmission mechanism 100 of the second embodiment includes: first driven pieces 75(75a, 75b) which are two protrusions provided on the outer side surface of the rotating member 70; second driven pieces 76(76a, 76b) disposed at positions separated by a predetermined distance in the clockwise direction from the first driven pieces 75; a buffer member (elastic member) 101 made of a compression spring or the like and disposed between the first and second driven pieces 75, 76 in a freely extendable and retractable state; and two driving pieces 92 and 93 as projections provided on an inner side surface (a surface facing the rotary member) of the driving gear 90, and intermittently rotationally driving the rotary member 70 via the buffer member 101 and the driven pieces 75 and 76 by contacting and pressing the buffer member 101 in a circumferential direction while relatively rotationally moving (rotating forward and backward) the driven pieces 75 and 76, respectively.

The driven pieces 75, 76 and the driving pieces 92, 93 have a radial positional relationship not interfering (contacting) with each other. That is, the driven pieces 75 and 76 are respectively composed of strip-shaped driven pieces 75a and 76a protruding from the inner circumference of the annular convex portion 71a on the outer surface of the rotating member and strip-shaped driven pieces 75b and 76b protruding from the outer circumference of the central convex portion 71b on the outer surface of the rotating member and facing the driven pieces 75a and 76 a. On the other hand, since the driving pieces 92 and 93 are provided so as to project in an arc shape at radial positions (positions corresponding to the intermediate positions of the radial width of the recess 71 c) that can pass through the radial gaps between the driven pieces 75a and 75b and the radial gaps between the driven pieces 76a and 76b, the driven pieces and the driving pieces do not interfere with each other while moving relatively in the circumferential direction.

The first driving piece 92 is pressed against one end of the cushion member 101 held between the driven pieces 75 and 76 at the time of normal rotation shown in fig. 15, and compresses the first driven piece 75 to rotate the rotary member normally via the driven piece 75. The second driving piece 93 is pressed against the other end of the buffer member 101 held between the driven pieces 75 and 76 at the time of reverse rotation shown in fig. 16, and rotates the rotary member via the driven piece 76 while compressing the second driven piece 76.

The above characteristic structure produces the following characteristic effects.

That is, at the time of normal rotation, at each stage after the dislocation shown in fig. 15(d) and (e), a deceleration section G1 having a large circumferential length is formed between the first driven piece 75 and the first driving piece 92 due to the expanding action of the cushioning member 101. Therefore, as shown in fig. 15(f), the deceleration section G1 formed at the time when the rotating member stops also has a large circumferential length, and can decelerate with a margin and prevent overrun.

Therefore, it is not necessary to expect formation of a minute deceleration section by preceding rotation due to acceleration of the rotating member when the roller 142 is fitted from the outer periphery 73 of the rotating member into the recessed portion 72.

As shown in fig. 15(f), the circumferential gap G1 between the first driven piece 75 and the first driving piece 92 at the time when the rotating member stops is the deceleration section G1 of the driving gear. The drive gear 90 (first driven piece 75) continues to rotate within the above-described deceleration range due to the inertia (the remaining potential of the drive gear 92) of the improper prevention motor with respect to the rotating member 70 (first driven piece) that has stopped in the initial rotation posture due to the roller locking. That is, while the first driving piece 92 rotates and moves in the deceleration section while compressing the buffer member 101, the inertial force of the driving gear is reduced by the damping action of the buffer member, and the impact force when the driving piece 92 presses the driven piece 75 via the buffer member is relaxed. Due to this cushioning effect, the rotation member locked by the roller urged by the lever urging member 146 can continue to maintain the stopped state in the initial rotation posture while the driving piece 92 rotates and moves in the deceleration section. Therefore, the opening/closing member 50 is reliably positioned so that the guide slit 52 is in the initial rotational posture for opening the conveying path.

In addition, in the present embodiment, since the cushion member has a function of extending the distance between the driving piece and the driven piece, the angular range of the deceleration section formed in the case where the cushion member 101 is present is larger than the deceleration section formed in the case where the cushion member is not present. By increasing the deceleration section, more surplus deceleration can be performed, and the impact applied to the driven piece can be significantly reduced.

Further, the use of the common single cushion member 101 is advantageous in that it is possible to prevent overrun by securing a wide deceleration section not only in the normal rotation but also in the reverse rotation.

The control procedure for the fraud detection and the fraud prevention operation in the fraud prevention mechanism 24 according to the second embodiment is the same as that of the first embodiment described with reference to the flowchart of fig. 9, and therefore, redundant description is omitted.

< operation of the fraud prevention mechanism of the second embodiment >

Next, a rotation posture control procedure of the opening/closing member in the irregularity prevention mechanism (drive transmission mechanism) according to the second embodiment will be described with reference to fig. 15, 16, and 11.

Fig. 15(a) to (f) are explanatory views showing a rotation posture control procedure of the opening/closing member when the malfunction prevention motor of the malfunction prevention mechanism of the second embodiment is rotated in the normal direction. Fig. 11 is a flowchart showing an operation procedure of rotating the opening/closing member n times, and is a subroutine corresponding to step 108 of the flowchart of fig. 9.

In fig. 15(a), the guide slit 52 of the opening and closing member 50 is in an initial rotation posture, that is, in an open state (standby state) in which the banknotes P are allowed to pass through the guide slit. In this standby state, the home position detection sensor 160 detects the detected portion 144c of the lever, the malfunction prevention motor 120 is stopped, and the roller 142 biased by the spring is completely fitted in the recessed portion 72 of the rotary member, so that the rotary member 70 stops rotating. At this time, step 130 in fig. 11 is yes, and it is detected that the opening/closing member is in the initial rotation posture.

In the standby state of fig. 15(a), the first driving piece 92 of the driving gear stops in a state where the cushioning member 101 is lightly compressed between itself and the first driven piece 75, but the cushioning member does not generate a repulsive force to such an extent that the roller 142 is disengaged from the recessed portion.

Next, as shown in steps 101 to 105 of fig. 9, when it is detected that the banknotes P fed from the inlet 12 and detected as genuine banknotes by the optical recognition sensor 18 pass through the fraud prevention mechanism 24 and are stored in the stacker on the downstream side, the fraud prevention motor 120 is rotated by n turns as shown in step 108. Fig. 15(b) shows the normal rotation start state at this time.

That is, in the normal rotation starting state (fig. 9: step 131) of fig. 15(b), the driving gear 90 starts rotating earlier than the rotating member in the stopped state, and therefore, the buffer member 101 is strongly compressed between the first driven piece 92 and the first driving piece 75. When the compressed state of the buffer member 101 reaches the limit state and the repulsive force is increased, the pressing force transmitted from the first driving piece 92 to the first driven piece 75 via the buffer member increases, and therefore, the rotating member starts the normal rotation against the urging force of the lever urging member 146. When the rotating member starts to rotate in the normal direction, the recessed portion 72 starts to rotate relative to the roller 142, and as shown in the sequence of (c) and (d), the roller is displaced in the outer diameter direction to be disengaged from the recessed portion (unseat), is transferred to the outer peripheral edge 73, and starts to move. The cushioning member continues to be strongly compressed until the roller comes off the recessed portion, and after the separation as shown in (c), expands to form a wide deceleration section G1.

The rotational posture detection means 140 continues to detect whether or not the opening/closing member is returned to the initial rotational posture during this period (step 132).

After the roller is disengaged from the recessed portion, as shown in (d) and (e), the cushioning member 101 is in a state of being widely spread, and therefore, a deceleration section G1 having a large circumferential length (angle θ 1) is formed between the first driven piece 75 and the first driving piece 92.

When the drive gear 90, the buffer member 101, and the rotary member 70 are integrated and continue to rotate in the normal direction, and the drive force transmission from the motor 120 is interrupted while the large deceleration section G1 indicated by the angle θ 1 in (f) remains between the first driven piece 75 and the first driving piece 92, the rotation is thereafter continued in the normal direction by inertia. In this normal rotation, the first driving piece 92 compresses the cushioning member while slowly decelerating due to the cushioning effect of the squashing of the cushioning member 101, and can be stopped without applying an impact to the first driven piece 75. Therefore, the deceleration section G1 formed at the time when the motor stops can be ensured to be large, and the driven piece can be prevented from being pressed with excessive force to cause overrun in conjunction with the cushioning action of the cushioning member.

In addition, on the illustration, the angle θ 1 of the deceleration section G1 in (d) and (e) and the angle θ 1 of the deceleration section G1 in (f) are depicted as being constant, but are not limited to being constant, and the angle θ 1 in deceleration in (f) may be decreased.

By eliminating the overtravel of the rotating member, the guide slit 52 of the opening/closing member 50 can always be stopped in the initial rotational posture, and the risk of paper jam at the position of the guide member of the banknote newly conveyed on the conveying path can be eliminated. Further, since the overrun removing operation performed by reversing the motor 120 is not necessary, it is possible to prevent a decrease in the processing speed and prevent a decrease in the durability of the driving member such as the motor.

Next, as described in the first embodiment, in the same banknote transport device 1, there is a possibility that the form of the improper means is required to be taken up when the opening/closing member is reversed (clockwise) not only in the normal rotation, and therefore, a configuration in which the improper means can be taken up when the reverse rotation is performed in one drive transmission mechanism 100 will be described.

That is, fig. 16(a) to (f) are explanatory views showing the reverse operation procedure of the fraud prevention mechanism of the second embodiment.

Fig. 16(a) shows a state where the opening/closing member 50 waits for the insertion of bills, as in fig. 15 (a).

In the standby state of fig. 16(a), the second driving piece 93 of the driving gear presses the buffer member 101 between the second driven piece 76 and the driving gear, while the first driving piece 92 is located away from the buffer member 101.

Next, in (b), when the reverse rotation irregularity prevention motor 120 is started, the second driven piece 76 in the stopped state starts to be pressed in the reverse rotation direction (clockwise direction) by the second driving piece 93 via the buffer member, and the roller 142 is separated (displaced) from the recess 72 and transferred to the outer peripheral edge 73 as in (c). In (b) and (c), the damping member is compressed with a strong force, and therefore the force of the second driving plate 93 is transmitted to the second driving plate 76.

As the reverse rotation is further continued, the cushion member is expanded widely in (d) and (e) after the dislocation, and as a result, the rotation member is in a state of preceding the drive gear, and a wide deceleration section G3 is formed.

In (f), the further reverse rotation causes the roller to be seated in the recessed portion, and the transmission of the driving force to the driving gear 90 is cut off. At the time of the roll-in, a wide deceleration section G3 is secured between the second driven piece 76 and the second driving piece 93 by the expanding force of the buffer member 101, and the second driving piece starts decelerating from the distant position, so that sufficient deceleration can be performed. The mechanism of canceling the overrun by the existence of the deceleration section G3 and its advantages are the same as those in the forward rotation of fig. 15.

[ mechanism for preventing unauthorized use: third embodiment

< basic Structure >

The fraud prevention mechanism (drive transmission mechanism) according to the third embodiment will be described with reference to fig. 17 to 21.

Note that the same portions as those of the second embodiment are denoted by the same reference numerals, and redundant description of the configuration and operation is omitted. That is, the fraud prevention mechanism of the third embodiment is substantially the same as that of the second embodiment except for the configuration of the drive transmission mechanism 100. That is, the gear mechanism 130, the rotational posture detection mechanism 140, and the control mechanism 200 have the same configurations, functions, and operations as those of the second embodiment.

Fig. 17(a), (b), and (C) are a front view showing an example of the irregularity prevention mechanism of the third embodiment, a front view showing an assembled state of the rotation member and the rotation posture detection mechanism, and a front view showing a state where a part of the drive gear and the buffer member are added to (b), fig. 18(a) to (d) are explanatory views, perspective views, (a) a right side view, and (a) a C-C sectional view showing a structure of the opening and closing member, and fig. 19(a), (b), and (C) are perspective views, side views, and side views of an inner side surface of the drive gear and a side view with the buffer member. Fig. 20(a) to (f) are explanatory views of an operation procedure in the normal rotation of the opening/closing member in the irregularity prevention mechanism, and fig. 21(a) to (f) are explanatory views of an operation procedure in the reverse rotation of the opening/closing member.

The fraud prevention mechanism 24 of the third embodiment is a modification of the second embodiment, and differs from the second embodiment in the configuration of the drive transmission mechanism 100, in particular, the configuration of the driven pieces 75 and 76 provided on the rotating member 70, the configuration of the driving pieces 92 and 93 provided on the drive gear 90, the arrangement of the buffer member 101, and the like.

Specifically, the driven pieces 75 and 76 are elongated circular arc-shaped projections provided at the radial direction width intermediate positions of the recesses 71c on the outer surface of the rotating member, and are in a positional relationship not interfering with the driving pieces 92 and 93 during relative rotation.

On the other hand, the driving pieces 92 and 93 are respectively constituted by driving pieces 92a and 93a provided to protrude on the inner periphery of the outer annular projecting portion 91a on the inner surface of the driving gear and driving pieces 92b and 93b provided to protrude on the outer periphery of the central projecting portion 91b on the inner surface of the driving gear so as to face each other with a predetermined passing gap between the driving pieces 92a and 93a, and the driven pieces 75 and 76 can pass through the passing gap in the circumferential direction. In contrast to the second embodiment, the buffer member 101 is disposed between the driving pieces 92 and 93, and is pressed against each other by one of the driven pieces 75 and 76 at the time of normal rotation and reverse rotation, and contracts at intervals in the circumferential direction of the driving pieces 92 and 93.

Since the driven piece and the driving piece are displaced from each other in the radial positional relationship, the two pieces do not undergo cushioning (contact) during relative rotation, and on the other hand, the driven piece is configured to enter the passing gap and come into contact with only the cushioning member held between the two pairs of driving pieces to press them relatively.

That is, the drive transmission mechanism 100 of the third embodiment includes: a first driven piece 75 which is a protrusion provided on the outer side surface of the rotating member; a second driven piece 76 disposed at a position separated by a predetermined distance in the clockwise direction from the first driven piece; and driving pieces 92 and 93 which are provided so as to protrude from the inner side surface (the surface facing the rotary member) of the driving gear 90 in a positional relationship such that the circumferential positions thereof are different from each other, and which hold a buffer member 101 made of an elastic member such as a compression spring in a freely extendable and retractable manner, and intermittently rotationally drive the driven pieces 75 and 76 (the rotary member 70) via the buffer member while relatively rotationally moving (rotating forward and backward) with respect to the driven pieces 75 and 76.

The first driving piece 92 is pressed against one end of the cushion member 101 held between the first driving piece 93 and the first driven piece 92 at the time of normal rotation shown in fig. 20, and compresses the first driven piece 75 to rotate the rotary member normally via the first driven piece 75. The second driving piece 93 rotates the rotary member in the reverse direction shown in fig. 21 via the second driven piece 76 while compressing the cushioning member 101 held between the second driven piece 76 and the first driving piece 92.

In other words, the drive transmission mechanism 100 of the third embodiment includes: two driven pieces 75, 76 provided to the rotating member; and two driving plates 92, 93 on the driving gear side in a radial positional relationship not interfering with the driven plates, and the buffer member 101 is disposed in a circumferential gap formed between the driving plates 92, 93, and is compressed between the first driving plate 92 and the first driven plate 75 at the time of normal rotation and urges the first driven plate 75 in the normal rotation direction. During the reverse rotation, the second driven piece 76 is urged in the reverse direction while being compressed between the second driving piece 93 and the second driven piece 76.

At each stage of the normal rotation shown in fig. 20(d) and (e), a deceleration section G1 having a large circumferential length is formed between the first driven piece 75 and the first driving piece 92 due to the expanding action of the cushioning member 101. Therefore, as shown in fig. 20(f), the deceleration section G1 formed at the time when the rotating member stops also has a large circumferential length, and can decelerate with a margin and prevent overrun.

In each stage of the reverse rotation shown in fig. 21(d), (e) and (c), a deceleration section G3 having a similar large size may be formed.

The principle that the overrun is eliminated by the cooperation of the deceleration sections G1, G3 and the damping action of the shock-absorbing member and the opening/closing member 50 can be returned to the initial rotational posture is the same as that described in the second embodiment.

The control procedure for the fraud detection and the fraud prevention operation in the fraud prevention mechanism 24 of the third embodiment is the same as that of the first embodiment described based on the flowchart of fig. 9, and therefore, redundant description is omitted.

< operation of the fraud prevention mechanism in the third embodiment >

Next, a rotation posture control procedure of the opening/closing member in the fraud prevention mechanism (drive transmission mechanism) according to the third embodiment will be described with reference to fig. 20 and 21. The flowchart of fig. 11 is also referred to.

Fig. 20(a) to (f) are explanatory views showing a rotation posture control procedure of the opening/closing member when the malfunction prevention motor of the malfunction prevention mechanism of the third embodiment is rotated in the normal direction.

Fig. 20(a) shows the same standby state as fig. 15(a) of the second embodiment.

In the normal rotation starting state (step 131) of (b), the driving gear 90 starts rotating earlier than the rotating member in the stopped state, and therefore the buffer member 101 is strongly compressed between the first driving piece 92 and the first driven piece 75. When the compression state of the shock-absorbing member 101 reaches the limit state and the repulsive force is increased, the rotating member starts the normal rotation against the urging force of the lever urging member 146. When the rotating member starts to rotate forward, the roller is displaced in the outer radial direction to be disengaged from the recess (unseated), and is moved to the outer peripheral edge 73 and continues to move as shown in the sequence of (c) and (d).

The rotational posture detection means 140 continues to detect whether or not the opening/closing member is returned to the initial rotational posture during this period (step 132).

After the roller is disengaged from the recessed portion, as shown in (d) and (e), the cushioning member 101 is in the expanded state, and therefore, a deceleration section G1 having a sufficiently large circumferential length (angle θ 1) is formed between the first driven piece 75 and the first driving piece 92.

Subsequently, when the seated state shown in (f) is reached, the first driving piece 92 is kept in the large deceleration section G1 indicated by the angle θ 1 in (f) with the first driven piece 75, and the transmission of the driving force from the motor 120 is interrupted, so that the rotation is continued in the normal rotation direction by inertia thereafter. In the normal rotation process, the first driving piece 92 compresses the cushioning member while slowly decelerating, and can be stopped without applying an impact to the first driven piece 75. Therefore, the deceleration section θ 1 formed at the time when the motor stops can be ensured to be large, and the driven piece can be prevented from being pressed with excessive force and overtravel can be prevented in conjunction with the cushioning action of the cushioning member.

Next, fig. 21(a) to (f) are explanatory diagrams showing a reverse operation procedure of the fraud prevention mechanism of the third embodiment.

In the standby state of fig. 21(a), the drive gear 90 and the rotary member 70 stop rotating.

In (b), when the reverse rotation irregularity prevention motor 120 is started, the second driven piece 76 in the stopped state starts to be pressed in the reverse rotation direction (clockwise direction) by the second driving piece 93 via the buffer member, and the roller 142 is separated (displaced) from the recess 72 and transferred to the outer peripheral edge 73 as in (c). In (b) and (c), the damping member is compressed with a strong force, and therefore the force of the second driving plate 93 is transmitted to the second driving plate 76.

As the reverse rotation is further continued, the buffer member is expanded widely in (d) and (e), and as a result, the rotating member is in a state of preceding the drive gear, and a wide deceleration section G3 is formed.

In (f), the roller is positioned in the recessed portion, and transmission of the driving force to the driving gear 90 is cut off. At this time, a wide deceleration section G3 is ensured between the second driven piece 76 and the second driving piece 93 by the expanding force of the buffer member 101, and the second driving piece is kept in the deceleration section G3 with the driven piece, and therefore, the second driving piece is kept in the reverse rotation direction by inertia thereafter. This inertia is weakened by the cushioning effect of the cushioning member in the fully expanded state, and therefore the occurrence of overrun can be effectively prevented.

[ mechanism for preventing unauthorized use: fourth embodiment

< basic Structure >

The fraud prevention mechanism of the fourth embodiment will be described with reference to fig. 22 to 26.

Fig. 22(a), (b), and (c) are a front view showing an example of the irregularity prevention mechanism of the fourth embodiment, a front view showing an assembled state of the rotation member and the rotation posture detection mechanism, and a front view showing a state in which a part of the drive gear and the buffer member are added to (b), fig. 23(a) to (D) are explanatory views and perspective views showing a structure of the opening and closing member, (a) a right side view (with the buffer member), and a D-D sectional view of (a), and fig. 24(a) and (b) are a perspective view and a side view of an inner side surface of the drive gear. Fig. 25(a) to (f) are explanatory views of an operation procedure in the normal rotation of the opening/closing member in the irregularity prevention mechanism, and fig. 26(a) to (f) are explanatory views of an operation procedure in the reverse rotation of the opening/closing member in the irregularity prevention mechanism.

Note that the same portions as those in the above embodiments are denoted by the same reference numerals, and redundant description of the structure and operation is omitted. That is, the fraud prevention mechanism of the fourth embodiment is substantially the same as the above-described embodiments except for the configuration of the drive transmission mechanism 100.

The drive transmission mechanism 100 according to the fourth embodiment has a characteristic structure in which the driven piece 74 (interference type driven piece) according to the first embodiment is added to the rotary member 70 in the second embodiment having only the driven pieces 75 and 76 (non-interference type driven piece is held without being directly pressed by the driving piece) and the driven piece (third driven piece) 74 is directly pressed by the two driving pieces 92 and 93 at the time of normal rotation and reverse rotation, respectively. Further, the buffer member 101 is disposed between the driven pieces 75, 76 as in the second embodiment.

When the driving gear rotates forward, the second driving piece 93 not in contact with the buffer member directly contacts and presses the driven piece 74, and as shown in fig. 25(b) and (c), the dislocation is reliably realized at a predetermined determined timing. When the driving gear rotates reversely, the first driving piece 92 not in contact with the buffer member is pressed against the driven piece 74 while being in direct contact therewith, and thus, as shown in fig. 26(b) and (c), dislocation is reliably achieved at a predetermined determined timing.

As in the first embodiment, the driven piece 74 that is pressed while being in contact with the driving piece is arranged so as to block the movement path of each of the driving pieces 92 and 93 by extending from the inner peripheral surface of the annular projecting portion 71a corresponding to the inside of the fitting recess to the center of the rotary member. That is, the driven piece 74 is pressed by the second driving piece 93 to rotate the rotary member forward at the initial stage (fig. 25(b) and (c)) when the driving gear starts to rotate forward, and is pressed by the first driving piece 92 to rotate the rotary member backward at the initial stage (fig. 26(b) and (c)) when the driving gear starts to rotate backward. The driven piece 74 only contributes to the dislocation in which the roller is separated from the recessed portion at the time of normal rotation and reverse rotation, and after the dislocation, the rotating member moves ahead of the driving gear by the expanding force of the buffer member, and thus is in a state of being separated from the driving pieces 93 and 92.

As in the second embodiment, since the driven pieces 75(75a, 75b) and 76(76a and 76b) and the driving pieces 92 and 93 are displaced from each other in the radial positional relationship, interference (contact) does not occur in the process of relative rotation of the driving pieces with respect to the driven pieces. On the other hand, the driving pieces 92 and 93 are configured such that when one of the driving pieces presses the cushioning member 101, the other driving piece presses the driven piece 74.

That is, the drive transmission mechanism 100 of the fourth embodiment includes: two non-interference type driven pieces 75, 76 and one interference type driven piece (third driven piece) 74 having respective circumferential positions differently provided to the rotary member 70; and two driving pieces 92 and 93 which are arranged at different circumferential positions and which are in a positional relationship such that they do not interfere with the non-interference driven pieces 75 and 76 but interfere with the interference driven piece 74. When the driving gear rotates forward, the other driving piece 93 contacts and presses the interference driven piece 74, and when the driving gear rotates backward, the one driving piece 92 contacts and presses the interference driven piece 74. The buffer member 101 is disposed between the two non-interference driven pieces 75, 76, and is compressed between one driving piece 92 and one driven piece 75 and urges the one driven piece 75 in the normal rotation direction when the driving gear rotates in the normal rotation, and is compressed between the other driving piece 93 and the other driven piece 76 and urges the other driven piece 76 in the normal rotation direction when the driving gear rotates in the reverse rotation.

In the present specification, the interference type driven piece refers to a driven piece (74) that is in a positional relationship of interfering with any one of the driving pieces while the driving gear is relatively rotating with respect to the rotating member, and the non-interference type driven piece refers to a driven piece (75, 76) that is in a positional relationship of not interfering with any one of the driving pieces while the driving gear is relatively rotating with respect to the rotating member.

The buffer member 101 is pressed counterclockwise by the first driving piece 92 at the time of normal rotation of the driving gear, and is compressed between itself and the first driven piece 75, and urges the first driven piece 75 in the normal rotation direction. The first driving piece 92 approaches the first driven piece 75 while compressing the cushioning member, and the second driving piece 93 approaches the driven piece 74, and starts to press the driven piece 74 after the point of contact with the driven piece 74. Further, when the driving gear rotates reversely, the buffer member 101 is pressed clockwise by the second driving piece 93, compressed between the second driven piece 76 and the buffer member, and urges the second driven piece 76 in the reverse rotation direction. The second driving piece 93 approaches the second driven piece 76 while compressing the buffer member, and the first driving piece 92 approaches the driven piece 74, and starts pressing after contacting the driven piece 74.

In other words, in the present embodiment, when one driving piece compresses the cushioning member, the other driving piece functions to press the driven piece 74, whereas when the other driving piece compresses the cushioning member, the one driving piece functions to press the driven piece 74.

That is, in the present embodiment, the driving piece 92 or 93 is either one of the driving pieces 92 or 93 that rotates the rotation member forward or backward by directly pressing the driven piece 74, and the buffer member functions as a buffer means when the driving gear is decelerated after the rotation member is stopped in the initial rotation posture, in addition to the function of pressing the rotation member via either one of the driven pieces 75 or 76 at the stage before the driven piece 74 is directly driven.

The drive transmission mechanism 100 of the fourth embodiment is to eliminate the following problem in the first and second embodiments in which the rotary member is rotated only by the driving force via the buffer member.

That is, since the drive transmission mechanism 100 according to the first embodiment is configured such that the cushion member 101 is in contact with the driven piece 74 and presses the driven piece 74 while being compressed between the driven piece and the first driving piece 92, the behavior in which the roller is once separated from the recessed portion by being pressed by the driven piece 74, and then the roller is looped around and fitted into the recessed portion again and the timing for fitting again all depend on the uncertainty factor of the amount of compression (repulsive force) of the cushion member. That is, when the drive gear rotates by a certain angle, the roller starts to come off the recessed portion, and then at which timing the roller is fitted again is uncertain, and a deviation occurs. The same is true in the second embodiment. In particular, the degree of the variation becomes high due to the reduction in durability of the cushioning member.

In contrast, in the fourth embodiment, by adopting the configuration in which the interference type driven piece is directly pressed by the driving piece without the buffer member, the rotation angle and timing of the driving gear for starting the separation of the roller from the recessed portion, and the rotation angle and timing of the driving gear for re-fitting can be uniquely determined, and the variation can be prevented. That is, since the driving plate and the driven plate are both rigid bodies and are one member, and the buffer member is not interposed between the two plates, the position and angle at which the driving plate starts to press the driven plate can be uniquely determined, and when the driving gear rotates to a predetermined angle, the rotation of the rotating member is reliably started. Further, the existence of the buffer member can extend the deceleration section formed after the drive gear starts to rotate from the state in which the irregularity prevention motor is stopped, and therefore, the occurrence of overrun can be effectively prevented.

The control procedure for the fraud detection and the fraud prevention operation in the fraud prevention mechanism 24 of the fourth embodiment is the same as that of the first embodiment described based on the flowchart of fig. 9, and therefore, redundant description is omitted.

< operation of the fraud prevention mechanism in the fourth embodiment >

Next, a rotation posture control procedure of the opening/closing member in the fraud prevention mechanism (drive transmission mechanism) according to the fourth embodiment will be described with reference to fig. 25 and 26.

Fig. 25(a) to (f) are explanatory views showing a rotation posture control procedure of the opening/closing member when the malfunction prevention motor of the malfunction prevention mechanism of the fourth embodiment is rotated in the normal direction. The description will be made with reference to the flowchart of fig. 11 showing the operation procedure of rotating the opening/closing member by n rotations and the flowchart of fig. 9.

The operation sequence corresponding to each of the above embodiments is not described repeatedly as appropriate.

In the standby state of fig. 25(a), the rotation of the rotary member 70 is stopped, and the opening/closing member is in the initial rotation posture.

In fig. 25(a), the first driving piece 92 of the driving gear passes over the second driven piece 76 and comes into contact with the cushioning member 101, and stops in a state where the cushioning member is pressed against the first driven portion 75. At this time, the cushioning member 101 does not generate a repulsive force to such an extent that the roller 142 is disengaged from the recessed portion 72. The second driving plate 93 located 180 degrees apart from the first driving plate 92 is located between the first driven plate 75 and the driven plate (third driven plate) 74, but is not in contact with the driven plate 74.

Next, in the normal rotation starting state (step 131) of (b), the driving gear 90 starts normal rotation in advance of the rotation member in the stopped state, and therefore the buffer member 101 starts to be strongly compressed between the first driven piece 75 and the first driving piece 92. The first driven piece 75 is pressed by the increased repulsive force due to the compression of the cushioning member 101, but the second driving piece 93 rapidly comes into contact with the driven piece 74 and starts to be pressed before the rotating member starts to rotate due to the pressing force from the cushioning member, thereby starting the rotation of the rotating member. That is, the positional relationship of the second driving piece 93 with respect to the driven piece 74 and the first driven piece 75 is set as follows: the second driving piece 93 starts to contact the driven piece 74 and starts to be pressed before the rotation member starts to rotate via the first driven piece 75 by the buffer member pressed and compressed by the first driving piece 92.

The recessed portion 72 starts rotating relative to the roller 142, and as shown in the sequence of (c) and (d), the roller moves in the outer diameter direction to be disengaged from the recessed portion (disengaged position), then moves to the outer peripheral edge 73, and continues to move while rolling.

The rotational posture detection means 140 continues to detect whether or not the opening/closing member is returned to the initial rotational posture during this period (step 132).

After the roller comes off the recessed portion, as shown in fig. 25(d) and (e), the cushioning member 101 is in a state of being widely spread, and therefore, a deceleration section G1 having a sufficiently large circumferential length (angle θ 1) is formed between the first driven piece 75 and the first driving piece 92. After the dented portion is separated (dislocated) from the roller, the rotating member moves in the forward direction ahead of the driving gear by the expanding force of the buffer member, and therefore the second driving piece 93 is separated from the driven piece 74. That is, the second driving piece 93 is pressed against the driven piece 74 only when the driven piece is out of position, and the rotation angle and the required time (timing) of the driving gear from the start of normal rotation of the driving gear to the out of position are always constant values determined without being affected by the behavior of the buffer member.

When the drive gear 90, the buffer member 101, and the rotary member 70 are integrated and the normal rotation is continued, the roller moves relatively along the outer peripheral edge of the rotary member, and the state shown in (e) is achieved.

Subsequently, when the seated state shown in (f) is reached, the first driving piece 92 of the driving gear starts decelerating at the illustrated position. The circumferential gap G1 between the first driven piece 75 and the first driving piece 92 at the time when the rotating member stops becomes the deceleration section G1 of the driving gear. The first driving plate 92 is kept in the large deceleration section G1 indicated by the angle θ 1 in (f) with the first driven plate 75, and therefore, the driving force transmission from the motor 120 is interrupted, and thereafter, the rotation in the normal rotation direction is continued by inertia. The effect of preventing the overrun of the rotary member by the cushioning effect due to the squashing of the cushioning member 101 and the effect due to the overrun elimination are the same as those in the above-described embodiments.

In addition, in the present embodiment, since the cushioning member has a function of extending the distance between the driving piece and the driven piece, the angular range of the deceleration section formed in the case where the cushioning member 101 is present is much larger than the deceleration section formed in the case where the cushioning member is not present. By increasing the deceleration section, more surplus deceleration can be performed, and the impact applied to the driven piece can be significantly reduced.

Next, fig. 26(a) to (f) are explanatory diagrams showing a reverse operation procedure of the fraud prevention mechanism of the fourth embodiment. The description will be given with reference to the flowchart of fig. 11 relating to the normal rotation of the first embodiment.

Fig. 26(a) is the same standby state as fig. 25 (a).

In the standby state of fig. 26(a), the second driving piece 93 of the driving gear is in a position to lightly press the second driven piece 76 via the buffer member 101, while the first driving piece 92 is in a position away from the buffer member 101 and not in contact with the driven piece 74.

Next, in the reverse rotation starting state (step 131) of (b), the driving gear 90 starts reverse rotation in advance of the rotating member, and therefore the buffer member 101 starts to be strongly compressed between the second driving piece 93 and the second driven piece 76. Before the rotation member starts to reverse by the repulsive force of the buffer member 101, the first driving piece 92 promptly comes into contact with the driven piece 74 and starts to be pressed, thereby starting the reverse rotation of the rotation member. That is, the positional relationship of the first driving plate 92 with respect to the driven plate 74 and the second driving plate 76 is set as follows: the first driving piece 92 starts to contact the driven piece 74 and starts to be pressed before the buffer member pressed and compressed by the second driving piece 93 starts to rotate the rotating member via the second driven piece 76.

As shown in the sequence of (c) and (d), the roller is displaced in the outer diameter direction to be separated from the recessed portion (displaced), and then moved to the outer peripheral edge 73 while rolling.

The rotational posture detection means 140 continues to detect whether or not the opening/closing member is returned to the initial rotational posture during this period (step 132).

As the reverse rotation is further continued, the buffer member is expanded widely in (d) and (e), and as a result, the rotating member is in a state of preceding the drive gear, and a wide deceleration section G3 is formed.

In (f), the roller is seated in the depression, and transmission of the driving force to the driving gear 90 is cut off. At the time of seating, a wide deceleration section G3 is secured between the second driven piece 76 and the second driving piece 93 by the expanding force of the buffer member 101, and the second driving piece starts decelerating from the distant position, so that sufficient deceleration can be performed. The overrun prevention effect and the overrun cancellation effect by forming a wide deceleration section are the same as those in the case of the normal rotation.

Further, since the first driving piece 92 is pressed against the driven piece 74 only when the driven piece is out of position, the rotation angle and the required time (timing) of the driving gear from the start of reverse rotation of the driving gear to the out of position can always be a predetermined value without being affected by the behavior of the buffer member.

[ mechanism for preventing unauthorized use: fifth embodiment

< basic Structure >

The fraud prevention mechanism according to the fifth embodiment will be described with reference to fig. 27 to 31.

Note that the same portions as those in the above embodiments are denoted by the same reference numerals, and redundant description of the structure and operation is omitted. That is, the fraud prevention mechanism of the fifth embodiment is substantially the same as the above-described embodiments except for the configuration of the drive transmission mechanism 100.

Fig. 27(a), (b), and (c) are a front view showing an example of the fraud prevention mechanism of the fifth embodiment, a front view showing an assembled state of the rotation member and the rotation posture detection mechanism, and a front view showing a state where a part of the drive gear and the buffer member are added to (b), fig. 28(a) to (d) are explanatory views, perspective views, (a) right side view, and (a) E-E sectional view showing a structure of the opening and closing member, and fig. 29(a), (b), and (c) are perspective views, side views, and side views of an inner side surface of the drive gear and a side view where the buffer member is added. Fig. 30(a) to (f) are explanatory views of an operation procedure in the normal rotation of the opening/closing member in the irregularity prevention mechanism, and fig. 31(a) to (f) are explanatory views of an operation procedure in the reverse rotation of the opening/closing member.

The drive transmission mechanism 100 of the fifth embodiment has a structure in which the third embodiment and the fourth embodiment are combined.

Specifically, the driven pieces 75 and 76 are elongated circular arc-shaped projections provided at the radial direction width intermediate positions of the recesses 71c on the outer surface of the rotating member, as in the third embodiment, and are in a positional relationship such that they do not interfere with the driving pieces 92 and 93 during the relative rotation with the drive gear.

On the other hand, the driving pieces 92 and 93 are respectively constituted by driving pieces 92a and 93a provided to protrude on the inner periphery of the outer annular projecting portion 91a on the inner surface of the driving gear and driving pieces 92b and 93b provided to protrude on the outer periphery of the central projecting portion 91b on the inner surface of the driving gear so as to face the driving pieces 92a and 93a with a predetermined passage gap therebetween, and the driven pieces 75 and 96 can pass through the passage gap in the circumferential direction. Further, the buffer member 101 is disposed between the driving pieces 92, 93, and expands and contracts within a circumferential interval of the driving pieces 92, 93.

The driven pieces 75 and 76 have a function of contacting and compressing the cushioning member by relatively entering the respective passage gaps.

In particular, since the driven pieces 75 and 76 and the driving pieces 92 and 93 are displaced from each other in the radial direction, the two pieces do not interfere (contact) with each other during the relative rotation, and the driven pieces 75 and 76 are configured to press only the buffer member 101 held between the two driving pieces 92 and 93 by contacting with each other. Further, at the time of normal rotation and reverse rotation of the drive gear, the driven pieces 75, 76 are pressed by a single interference type driving piece (third driving piece) 96, respectively, so that the rotary member is rotated in normal rotation and reverse rotation.

That is, on the inner side surface of the drive gear, an interference type driving piece 96 that interferes with the driven pieces 75, 76 is disposed so as to straddle between the outer annular projection 91a and the center projection 91b at a position equidistant from the driving pieces 92, 93. When the driving gear rotates forward, one driving piece 92 urges the driven piece 75 while compressing the cushioning member 101 with one driven piece 75, and the interference type driving piece 96 contacts and presses the other driven piece 76. Further, at the time of reverse rotation of the driving gear, the other driving piece 93 urges the driven piece 76 while compressing the cushioning member 101 with the other driven piece 76, and the interference type driving piece 96 comes into contact with and presses the one driven piece 75.

That is, the drive transmission mechanism 100 of the fifth embodiment includes: two driven pieces 75, 76 provided at different circumferential positions to the rotating member; two driving plates 92, 93 disposed at different circumferential positions on the driving gear and in a positional relationship not interfering with the two driven plates 75, 76; and an interference type driving piece (third driving piece) 96 in a positional relationship of interfering with the driven pieces 75, 76. The interference type driving piece 96 is in contact with and presses the other driven piece 76 at the time of the normal rotation shown in fig. 30, and the interference type driving piece 96 is in contact with and presses the one driven piece 75 at the time of the reverse rotation shown in fig. 31. The buffer member 101 is disposed between the two driving pieces 92, 93, and is compressed between one driving piece 92 and one driven piece 75 and urges the one driven piece 75 in the normal rotation direction when the driving gear rotates in the normal rotation, and is compressed between the other driving piece 93 and the other driven piece 76 and urges the other driven piece 76 in the reverse rotation direction when the driving gear rotates in the reverse rotation.

During the normal rotation of the drive gear 90, the interference type driving piece 96 is pressed in direct contact with the second driven piece 76 without passing through the buffer member 101, and the rotating member 70 is driven in the normal rotation. When the driving gear rotates in the reverse direction, the interference type driving piece 96 is pressed against the first driven piece 75 without being in direct contact therewith via the buffer member 101, and the rotating member 70 is driven in the normal direction.

At each stage shown in fig. 30(d) and (e), a deceleration section G1 having a large circumferential length is formed between the first driving piece 92 and the first driven piece 75 due to the expanding action of the cushioning member 101. Therefore, as shown in fig. 30(f), the deceleration section G1 formed at the time when the rotating member stops also has a large circumferential length, and can decelerate with a margin and prevent overrun.

The principle that the overrun is eliminated by the deceleration section G1 in cooperation with the damping action of the shock-absorbing member and the opening/closing member 50 can be returned to the initial rotational posture is the same as that described in the above embodiments.

The control procedure for the fraud detection and the fraud prevention operation in the fraud prevention mechanism 24 of the fifth embodiment is the same as that of the first embodiment described with reference to the flowchart of fig. 9, and therefore, redundant description is omitted.

< operation of the fraud prevention mechanism in the fifth embodiment >

Next, a rotation posture control procedure of the opening/closing member in the fraud prevention mechanism (drive transmission mechanism) according to the fifth embodiment will be described with reference to fig. 30 and 31. The flowchart of fig. 11 is also referred to.

Fig. 30(a) to (f) are explanatory views showing a rotation posture control procedure of the opening/closing member when the malfunction prevention motor of the malfunction prevention mechanism of the fifth embodiment is rotated in the normal direction. Since each of the drawings (a) to (f) in fig. 30 corresponds to each of the drawings (a) to (f) in the above embodiments, redundant description is omitted.

In the standby state of fig. 30(a), the rotation of the rotary member 70 is stopped.

In the standby state of fig. 30(a), the first driving piece 92 of the driving gear slightly compresses the buffer member 101 between itself and the first driven piece 75. The interference type driving plate 96 is in a non-contact state with which driven plate.

In the normal rotation starting state (step 131) of (b), the buffer member 101 is strongly compressed between the first driving piece 92 and the first driven piece 75, and the interference type driving piece 96 presses the second driven piece 76, so that the rotating member starts normal rotation. When the rotating member begins to rotate in the forward direction, the roller is unseated from the recess, transferred to the outer peripheral edge 73 and continues to move, as shown in sequence (c) and (d). The first driven piece 75 is not driven by the pressure from the compressed buffer member, but is driven only by the pressing force from the interference type driving piece 96.

The rotational posture detection means 140 continues to detect whether or not the opening/closing member is returned to the initial rotational posture during this period (step 132).

After the roller is disengaged from the recessed portion, as shown in (d) and (e), the cushioning member 101 is in the expanded state, and therefore, a deceleration section G1 having a sufficiently large circumferential length (angle θ 1) is formed between the first driven piece 75 and the first driving piece 92. At the time (d), the interference type driving plate 96 and the second driven plate 76 are already separated and no driving force is transmitted.

Subsequently, when the seated state shown in (f) is reached, the driving piece 92 starts decelerating at the illustrated position. That is, the first driving plate 92 is kept in the large deceleration section G1 indicated by the angle θ 1 in (f) with the first driven plate 75, and the driving force transmission from the motor 120 is interrupted, so that the first driving plate continues to rotate in the normal rotation direction by inertia thereafter. In this normal rotation, the first driving piece 92 compresses the cushioning member while slowly decelerating due to the cushioning effect of the squashing of the cushioning member 101, and can be stopped without applying an impact to the first driven piece 75. Therefore, the deceleration section G1 formed at the time when the motor stops can be ensured to be large, and the driven piece can be prevented from being pressed with excessive force and overtravel can be prevented in conjunction with the cushioning action of the cushioning member.

Next, fig. 31(a) to (f) are explanatory diagrams illustrating a reverse operation procedure of the fraud prevention mechanism of the fifth embodiment.

In fig. 31(a), the rotation member 70 stops rotating.

In the standby state of (a), the second driving piece 93 of the driving gear slightly compresses the buffer member 101 between itself and the second driven piece 76. The interference type driving plate 96 is in a non-contact state with which driven plate.

In the reverse rotation starting state (step 131) of (b), the buffer member 101 is strongly compressed between the second driving piece 93 and the second driven piece 76, and the interference type driving piece 96 presses the first driven piece 75 in the clockwise direction, so that the rotating member starts reverse rotation. When the rotating member starts to reverse, the roller is disengaged from the recess (dislocated), shifted to the outer peripheral edge 73 and continues to move, as shown in sequence (c) and (d). The second driven piece 76 is not driven by the pressure from the compressed buffer member, but is driven only by the pressing force from the interference type driving piece 96.

After the roller is disengaged from the recess, as shown in (d) and (e), the cushioning member 101 is in the expanded state, and therefore, a deceleration section G3 having a sufficiently large circumferential length (angle θ 3) is formed between the second driven piece 76 and the second driving piece 93. At the time (d), the interference type driving piece 96 and the first driven piece 75 are already separated from each other, and the transmission of the driving force is not performed.

Since fig. 31(e) and (f) are opposite to those in the normal rotation of fig. 30(a) and (f) only in the rotation direction, the description thereof is omitted.

[ summary of the Structure, action, and Effect of the invention ]

The fraud detection mechanism 24 according to the first aspect of the invention is a mechanism for detecting whether or not a fraud unit U is attached to a sheet P conveyed along a conveyance path 10, and is characterized by comprising: an irregularity detecting opening-closing member 50 that allows passage of the sheet when in an initial rotation posture and prevents passage of the sheet when in a non-initial rotation posture that deviates from the initial rotation posture; a rotating member 70 that rotates integrally with the opening and closing member; an opening/closing member driving drive member 90 disposed opposite to the rotation member and pivotally supported so as to be rotatable relative thereto; and a drive transmission mechanism 100 that intermittently transmits a driving force from the driving member to the rotating member, the drive transmission mechanism including: at least one driven piece provided to the rotating member 70; at least one driving piece provided to the driving member 90 and intermittently rotationally driving the rotating member by directly or indirectly pressing the driven piece in the circumferential direction in a process of relative rotational movement with respect to the driven piece; and a buffer member 101 for biasing the driven piece in a direction away from the driving piece.

The fraud detection mechanism 24 of the first invention corresponds to the first to fifth embodiments.

The fraud detection mechanism 24 is as follows: by rotating the opening/closing member 50 after the sheet passes through the slit 52 provided in the opening/closing member 50, an unauthorized means such as a wire or a tape fixed to the sheet is wound and physically detected, and the sheet is prevented from being drawn out by the unauthorized means. Further, the slit is not essential as the structure of the opening/closing member, and the opening/closing member itself having no slit may open/close the passage, or the opening/closing member may be provided with a notch instead of the slit.

When the slit 52 is set to be opened to allow the passage of the paper when the opening/closing member 50 is in a standby state, if the opening/closing member is out of range during the previous rotation and cannot be stopped in a posture (initial rotation posture) in which the slit is opened, the paper is jammed, and smooth and rapid operation is hindered.

As a method for preventing the overrun, if the motor is reversed to return to the initial rotation posture or PWM-controlled, the processing time increases or the durability of the components decreases.

On the other hand, when the driving member 90 is assembled to the rotating member 70 integrated with the opening/closing member 50 so as to be relatively rotatable, and the driven piece provided on the rotating member is intermittently driven at a predetermined timing by the driving piece provided on the driving member 90 side, the motor is stopped at the time when the rotating member returns to the initial rotation posture after n rotations. In this case, although a deceleration section for decelerating the driving piece of the driving member having a surplus potential with respect to the driven piece of the rotation member stopped earlier can be secured, the deceleration section is excessively small, and therefore the driving piece collides with the driven piece and an overrun occurs. Therefore, there is a problem that the processing time for returning to the initial rotation posture by the reverse operation is delayed, and the durability of the motor is reduced.

In order to prevent the opening/closing member rotated n times from overshooting when it is stopped in the initial rotation posture, if the motor 120 is stopped and braking is performed at an early stage before the rotation member reaches the initial rotation posture (before the rotation by 360 degrees), it is difficult to perform the braking timing. When the timing of braking to stop the rotating member is slightly too early, the driving piece may stop, that is, incomplete rotation may occur (stop in a state where the rotation angle does not reach 360 degrees) before the driving piece comes into contact with the driven piece due to excessive deceleration to move to the initial rotation posture. In practice, it is difficult to eliminate such a problem due to variations in component accuracy and assembly accuracy of each sheet conveying device, and it is difficult to individually set the timing of braking. Further, depending on the temperature environment of the place where the paper conveying device is installed, the operation of the fraud prevention mechanism may vary. For example, a small motor, which is slow and easy to stop in a low temperature environment of 0 degrees and is required to operate 50 ten thousand times in a high temperature environment of 60 degrees, is likely to have lower durability than a normal temperature environment. It is difficult to cope with such a problem by precise software control.

In addition, in the case where the opening and closing member 50 is required to be rotated two or more times per one banknote in order to prevent an improper passage, the number of rotations required of the small motor is 100 ten thousand or more. If the stopping position is corrected by reversing the direction after the overrun occurs, the small-sized motor performs a larger number of rotations.

In contrast, in the present invention, the above-described deceleration section can be enlarged by a simple improvement of adding and disposing only the buffer member 101 that biases the driven piece of the rotating member 70 in the direction of separating from the driving piece of the driving member 90, and the occurrence of overrun can be reliably prevented without performing reverse rotation or complicated software control, and the reduction in durability of the small-sized motor can be prevented.

In the embodiment, the driving gear 90 (driving piece) continues to rotate within the range of the deceleration section by inertia (self residual force) of the irregularity prevention motor with respect to the rotating member 70 (driven piece) that is stopped in the initial rotation posture by being locked by the roller 142 after rotating 360 degrees. That is, while the driving piece rotates and moves in the deceleration section while compressing the cushion member 101, the inertial force of the driving gear is reduced by the damping action of the cushion member, and the impact force when the driving piece presses the driven piece via the cushion member is relaxed. Due to this cushioning effect, the rotation member locked by the roller can continue to maintain the stopped state in the initial rotation posture while the driving piece is rotationally moved in the deceleration section. Therefore, the opening/closing member 50 is reliably positioned so that the guide slit 52 is in the initial rotational posture.

The drive transmission mechanism 100 can prevent overrun even in the case of normal rotation of the opening/closing member and, of course, in the case of reverse rotation.

The fraud prevention mechanism 24 of the second invention is characterized in that: the driving pieces 92, 93 and the driven pieces 75, 76 have a non-interference radial positional relationship, one (for example, 75) of the two driven pieces 75, 76 having different circumferential positions pressurizes the buffer member 101 disposed between the two driving pieces 92, 93 having different circumferential positions between the one driving piece (for example, 92) and the other driven piece (for example, 76) pressurizes the buffer member between the other driving piece (for example, 93).

The fraud prevention mechanism of the second invention corresponds to the third and fifth embodiments.

The buffer member 101 may be disposed at any position of the driving member and the rotating member as long as it functions to bias the driving member and the rotating member in the circumferential direction away from each other. In this example, a buffer member is disposed between the two driving pieces 92 and 93 disposed apart from each other. Driven plates 75, 76 advance and retreat relative to the buffer member and press the buffer member therebetween.

The drive transmission mechanism 100 can prevent overrun even in the case of normal rotation of the opening/closing member and, of course, in the case of reverse rotation.

The fraud prevention mechanism 24 of the third invention is characterized in that: the driving member includes an interference type driving piece 96 that directly presses the driven pieces 75 and 76.

The third invention corresponds to the fifth embodiment.

Since each driven piece is directly driven by the interference type driving piece 96 as a rigid body without passing through a shock absorbing member whose behavior is unstable, in the process of returning to the initial rotation posture again after rotating 360 degrees from the initial rotation posture, the timing of the return can be uniquely set, and the stability of the rotational operation of the opening and closing member for the purpose of abnormality detection and abnormality prevention can be improved.

The drive transmission mechanism 100 can prevent overrun even in the case of normal rotation of the opening/closing member and, of course, in the case of reverse rotation.

The fraud prevention mechanism 24 of the fourth invention is characterized in that: the driving pieces 92 and 93 and the driven pieces 75 and 76 have a non-interference radial positional relationship, one (for example, 92) of the two driving pieces having different circumferential positions pressurizes the buffer member 101 arranged between the two driven pieces having different circumferential positions between the one driven piece (for example, 75), and the other driving piece (for example, 93) pressurizes the buffer member between the other driven piece (for example, 76).

The fraud prevention mechanism 24 of the fourth invention corresponds to the second and fourth embodiments.

The buffer member 101 may be disposed at any position of the driving member and the rotating member as long as it functions to bias the driving member and the rotating member in the direction of separating them from each other in the circumferential direction. In this example, a buffer member is disposed between the two driven pieces 75 and 76 disposed apart from each other. The driver blades 92, 93 advance and retreat relative to the buffer member and press the buffer member therebetween.

The drive transmission mechanism 100 can prevent overrun even in the case of normal rotation of the opening/closing member and, of course, in the case of reverse rotation.

The fraud prevention mechanism 24 of the fifth invention is characterized in that: the interference type driven piece 74 is directly pressed by the driving pieces 92 and 93.

The fifth invention corresponds to the fourth embodiment.

Since the interference driven piece 74 is directly driven by the respective driving pieces 92 and 93 as rigid bodies without using a shock absorbing member whose behavior is unstable, in the process of returning to the initial rotation posture again after rotating 360 degrees from the initial rotation posture, the timing of the return can be uniquely set, and the stability of the rotational operation of the opening and closing member for the purpose of abnormality detection and abnormality prevention can be improved.

The drive transmission mechanism 100 can prevent overrun even in the case of normal rotation of the opening/closing member and, of course, in the case of reverse rotation.

The fraud detection mechanism 24 of the sixth invention is characterized in that: the buffer member 101 is disposed between one driven piece (75 or 76) and one driving piece (92 or 93), and is compressed between the one driving piece and the one driven piece when the driving member 90 rotates, while being in direct contact with the one driven piece and pressed in the rotational direction.

The sixth invention corresponds to the first embodiment.

By disposing the buffer member 101 between one driven piece 74 and one driving piece 92, it is possible to secure a wide deceleration section when the opening/closing member 50 rotates one rotation in one direction (normal rotation direction) and prevent the occurrence of overrun.

If the buffer member 101 is also disposed between the other driven piece 75 and the other driving piece 93, the occurrence of overrun can be prevented even at the time of reverse rotation.

The fraud detection mechanism 24 of the seventh invention is characterized in that: the drive transmission mechanism 100 includes: two driven pieces 75 and 76 arranged at different circumferential positions on the rotating member; and two driving pieces 92, 93 which are disposed at different circumferential positions on the driving member and are in a radial positional relationship not interfering with the driven pieces, and the buffer member 101 is disposed in a circumferential gap formed between the two driven pieces 75, 76, and is compressed between one driving piece 92 and one driven piece 75 and urges the one driven piece 75 in the forward direction when the driving member is rotated in the forward direction, and is compressed between the other driving piece 93 and the other driven piece 76 and urges the other driven piece 76 in the reverse direction when the driving member is rotated in the reverse direction.

The seventh invention corresponds to the second embodiment.

The effect of expanding the deceleration section by the shock-absorbing member 101 and the effect of preventing overrun resulting therefrom are the same as those of the other inventions.

The fraud prevention mechanism 24 of the eighth invention is characterized in that: the drive transmission mechanism 100 includes: two driven pieces 75 and 76 arranged at different circumferential positions on the rotating member; and two driving pieces 92, 93 which are disposed at different circumferential positions on the driving member and are in a radial positional relationship not interfering with the driven pieces, and a buffer member 101 which is disposed between the two driving pieces 92, 93, is compressed between one driving piece 92 and one driven piece 75 at the time of forward rotation of the driving member and urges the one driven piece 75 in the forward rotation direction, and is compressed between the other driving piece 93 and the other driven piece 76 at the time of reverse rotation of the driving member and urges the other driven piece 76 in the reverse rotation direction.

The eighth invention corresponds to the third embodiment.

The effect of expanding the deceleration section by the shock-absorbing member 101 and the effect of preventing overrun resulting therefrom are the same as those of the other inventions.

The fraud prevention mechanism 24 of the ninth invention is characterized in that: the drive transmission mechanism 100 includes: two driven pieces 75, 76 and a third driven piece (interference type driven piece) 74, which are disposed at different circumferential positions on the rotating member; and two driving pieces 92, 93 which are disposed on the driving member at different circumferential positions and which are in a positional relationship of not interfering with the two driven pieces but interfering with the third driven piece 74, one driving piece 93 being in contact with and pressing against the third driven piece 74 at the time of normal rotation, the other driving piece 92 being in contact with and pressing against the third driven piece 74 at the time of reverse rotation, and a buffer member 101 which is disposed between the two driven pieces 75, 76, is compressed between the other driving piece 92 and the one driven piece 75 at the time of normal rotation of the driving member and urges the one driven piece 75 in the normal rotation direction, and is compressed between the one driving piece 93 and the other driven piece 76 at the time of reverse rotation of the driving member and urges the other driven piece 76 in the normal rotation direction.

The ninth invention corresponds to the fourth embodiment.

Since the third driven piece 74 is directly driven by the rigid driving pieces 92 and 93 without using a shock absorbing member whose behavior is unstable, the timing of returning to the initial rotational posture can be uniquely set, and the stability of the rotational operation of the opening/closing member for the purpose of abnormality detection and abnormality prevention can be improved.

The effect of expanding the deceleration section by the shock-absorbing member 101 and the effect of preventing overrun resulting therefrom are the same as those of the other inventions.

The fraud prevention mechanism 24 of the tenth invention is characterized in that: the drive transmission mechanism 100 includes: two driven pieces 75 and 76 arranged at different circumferential positions on the rotating member; two driving pieces 92 and 93 disposed at different circumferential positions on the driving member and in a positional relationship not interfering with the two driven pieces 75 and 76; and a third driving piece 96 which is in a positional relationship of interfering with the driven pieces 75, 76, and which is in contact with and presses one driven piece 76 when the driving member is rotated forward, and in contact with and presses the other driven piece 75 when the driving member is rotated backward, and a buffer member 101 which is disposed between the two driving pieces 92, 93 and which is compressed between the one driving piece 92 and the other driven piece 75 when the driving member is rotated forward and urges the other driven piece 75 in the forward direction, and which is compressed between the other driving piece 93 and the one driven piece 76 when the driving member is rotated backward and urges the one driven piece 76 in the reverse direction.

The tenth invention corresponds to the fifth embodiment.

Since each driven piece is directly driven by the interference type driving piece 96 as a rigid body without passing through a shock absorbing member whose behavior is unstable, the timing of the return can be uniquely set in the process of returning to the initial rotation posture, and the stability of the rotational operation of the opening and closing member for the purpose of abnormality detection and abnormality prevention can be improved.

The fraud detection mechanism 24 according to the eleventh aspect of the invention is characterized by comprising: an irregularity prevention motor that drives the driving member; a rotation posture detection mechanism which detects whether the opening and closing member is in an initial rotation posture; and a control mechanism for controlling the motor for preventing the improper rotation, wherein the control mechanism closes the motor for preventing the improper rotation when the rotation posture detection mechanism detects that the opening and closing member is in the initial rotation posture.

When the opening/closing member is in the non-initial rotation posture, the motor is driven to rotate.

A paper conveying apparatus according to a twelfth aspect of the invention is characterized in that: the device includes the fraud detection mechanism according to any one of the first to eleventh aspects.

According to the paper conveying device, the fraud detection and fraud prevention effects of the fraud detection mechanisms can be exhibited.

A paper conveying apparatus according to a thirteenth aspect of the invention is characterized in that: the paper conveying device is provided.

According to the sheet processing apparatus, the fraud detection and fraud prevention effects of the fraud detection mechanisms can be exhibited.

Description of the symbols

1: banknote transport device, 3: lower unit, 4: upper unit, 10: banknote transport path, 12, 16, 20, 28: roller pair, 14: inlet sensor, 18: light recognition sensor, 22, 26: paper feed sensor, 24: fraud prevention mechanism, 28: exit roller pair, 30: exit sensor, 32: outlet, 50: opening and closing member, 52: guide slit, 54: rotation axis, 56: uneven portion, 70: rotating member, 71 a: annular projection, 71 b: center convex portion, 71 c: recess, 72: recessed portion, 73: outer peripheral edge, 74: driven piece, 76, 77: driven piece, 90: drive gear (drive member), 92, 93, 96: driving piece, 100: drive transmission mechanism, 101: cushioning member, 120: motor for preventing fraud, 130: gear mechanism, 132, 133, 134: relay gear, 135: pulse plate, 137: photo interrupter, 140: rotation posture detection mechanism, 142: roller (follower member), 142 a: shaft, 144: rod, 144 a: support portion, 144 b: shaft portion, 144 c: detected portion, 146: lever urging member, 160: home position detection sensor, 200: and a control mechanism.