阅读说明：本技术 一种自动化立体仓库 (Automatic stereoscopic warehouse ) 是由 吴永强 于 2021-08-11 设计创作，主要内容包括：本发明属于制造装备产业领域,具体的说是一种自动化立体仓库,包括仓库货架,所述仓库货架外表面的两侧均滑动连接有防尘套,所述仓库货架的两端均转动连接有滑动电机,所述滑动电机外表面的两侧均固定连接有推杆,所述推杆的内腔通过导线与滑动电机的内腔固定连接。该装置的自动化程度较高,相对人工操作,取物更加简单方便,并且,抽板将物体送出架框的过程中,无需使用者取出物体,就能够对物体进行确认,在大型仓库的抽样检测中非常方便,提高了检测效率,如果货架上的物体为装箱后的物体,抽板将物体送出架框后,物体仍在抽板上方,此时抽板可以当成物体的支撑点,防止物体掉落摔毁,减小了仓库内部物体损坏的风险。(The invention belongs to the field of manufacturing equipment industry, and particularly relates to an automatic stereoscopic warehouse which comprises a warehouse shelf, wherein two sides of the outer surface of the warehouse shelf are both connected with dustproof sleeves in a sliding mode, two ends of the warehouse shelf are both connected with sliding motors in a rotating mode, two sides of the outer surface of each sliding motor are both fixedly connected with push rods, and the inner cavities of the push rods are fixedly connected with the inner cavities of the sliding motors through leads. The device's degree of automation is higher, relative manual operation, it is more simple and convenient to get the thing, and, take out the in-process that the board sent the object out the frame, need not the user and take out the object, just can confirm the object, it is very convenient in the sampling detection in large-scale warehouse, detection efficiency is improved, if the object on the goods shelves is the object after the vanning, take out the board and send out the frame back with the object, the object is still taking out the board top, take out the board this moment and can be regarded as the strong point of object, prevent that the object from dropping and breaking, the risk that the inside object in warehouse damaged has been reduced.)

1. An automatic stereoscopic warehouse, includes warehouse goods shelves (1), its characterized in that: the warehouse shelf is characterized in that dustproof sleeves (2) are connected to two sides of the outer surface of the warehouse shelf (1) in a sliding mode, sliding motors (3) are connected to two ends of the warehouse shelf (1) in a rotating mode, push rods (4) are fixedly connected to two sides of the outer surface of the sliding motors (3) in a sliding mode, and inner cavities of the push rods (4) are fixedly connected with the sliding motors (3) through wires.

2. An automated stereoscopic warehouse according to claim 1, wherein: warehouse goods shelves (1) are including frame (11), the spout has been seted up to the inner wall of frame (11), the inner chamber of warehouse goods shelves (1) has connecting strip (13) through spout sliding connection, the board (7) are taken out to the right side fixedly connected with of connecting strip (13) surface, take out the external atress piece (12) of positive fixedly connected with of board (7), the right side sliding connection who takes out board (7) surface has fixed partition plate (14), the both ends of fixed partition plate (14) surface all with the inner wall fixed connection of frame (11), the supplementary bearing block (6) of lower part fixedly connected with of frame (11) inner wall, the spout has been seted up to the upper surface of frame (11), the upper surface of frame (11) has removal push rod (5) through spout sliding connection.

3. An automated stereoscopic warehouse according to claim 2, wherein: the movable push rod (5) comprises a clamping frame (51), the back of the outer surface of the clamping frame (51) is connected with the upper portion of the inner cavity of the frame (11) in a sliding mode through a sliding groove, a shaft lever (52) is clamped on the front face of the clamping frame (51), the inner cavity of the shaft lever (52) is rotatably connected with the bottom end of the sliding motor (3) through a rotating shaft, a sleeve (53) is fixedly connected to the lower portion of the outer surface of the shaft lever (52), a push plate block (8) is fixedly connected to the outer surface of the sleeve (53), a rotation connecting rod (54) is rotatably connected to the bottom end of the outer surface of the sleeve (53), and two ends of the rotation connecting rod (54) are rotatably connected with the outer surface of the sleeve (53).

4. An automated stereoscopic warehouse according to claim 2, wherein: the drawing plate (7) comprises a bearing plate (71), the left side of the outer surface of the bearing plate (71) is fixedly connected with a slide bar (74), the left side of the outer surface of the slide bar (74) is connected with the inner cavity of the external stress block (12) in a sliding way, the upper surface of the bearing plate (71) is fixedly connected with a tension strip (72), the top end of the tension strip (72) is fixedly connected with the right side of the outer surface of the external stress block (12) through a thick spring band, the upper part of the outer surface of the tension bar (72) is connected with a slide rail (73) in a sliding way, the top end of the slide rail (73) is fixedly connected with the right side of the outer surface of the external stress block (12), the front surface of the bearing plate (71) is provided with a round opening, the inner cavity of the bearing plate (71) is fixedly connected with an elastic telescopic rod (75) through the round opening, the left end of the elastic expansion rod (75) is fixedly connected with the outer surface of the fixed partition plate (14).

5. An automated stereoscopic warehouse according to claim 2, wherein: supplementary bearing block (6) are including strip shell (61), the grooving has been seted up on the upper portion of strip shell (61) inner chamber, grooving fixedly connected with antiskid side cover (63) is passed through on the upper portion of strip shell (61) inner chamber, antiskid side cover (63) surface right side fixedly connected with nipple (62), the upper surface of nipple (62) and the bottom fixed connection of fixed stop (14), the lower fixed surface of nipple (62) is connected with the elastic arm (64), the bottom of elastic arm (64) and the bottom fixed connection of strip shell (61) inner wall.

6. An automated stereoscopic warehouse according to claim 3, wherein: the push plate block (8) comprises a small base block (81), the left side of the outer surface of the small base block (81) is fixedly connected with the outer surface of the sleeve (53), a side rod (82) is fixedly connected to the right side of the outer surface of the small base block (81) through a connecting key, rubber wheels (83) are rotatably connected to the two ends of the side rod (82), and the outer surface of each rubber wheel (83) is connected with the right side of the outer surface of the small base block (81) in a sliding mode.

Technical Field

The invention belongs to the field of manufacturing equipment industry, and particularly relates to an automatic stereoscopic warehouse.

Background

The storage shelf is storage equipment and has six basic functions of logistics based on packaging, transportation, loading and unloading, sorting and information management; the goods shelf is an important tool for improving the efficiency of the modern warehouse, so that the goods shelf industry is produced at the same time, and the market demand is higher and higher; shelf broadly refers to a shelf for holding goods; the rack is used for storing the safekeeping equipment of the finished goods.

Present warehouse degree of automation is lower, still need to have a large amount of manual operations, if take out the object on the warehouse goods shelves, when the object in the warehouse goods shelves is heavier, it is difficult to take out the object from the eminence, and, the object is usually put inside the goods shelves, the user need confirm the object before taking out the object, this kind of condition is fairly common in large-scale warehouse, if the object on the goods shelves is the object after the vanning, the user still need take out the object from goods shelves inside, at this moment, the object does not have the atress strong point usually, drop very easily, the risk of the inside object damage of warehouse has been increased.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an automatic stereoscopic warehouse, which solves the problem that a user is difficult to take articles from the warehouse.

(II) technical scheme

The technical scheme adopted by the invention for solving the technical problems is as follows: the automatic stereoscopic warehouse comprises a warehouse shelf, wherein both sides of the outer surface of the warehouse shelf are respectively connected with a dustproof sleeve in a sliding manner, both ends of the warehouse shelf are respectively connected with a sliding motor in a rotating manner, both sides of the outer surface of the sliding motor are respectively fixedly connected with a push rod, and the inner cavity of the push rod is fixedly connected with the inner cavity of the sliding motor through a lead.

Warehouse goods shelves are including a frame, the spout has been seted up to the inner wall of frame, warehouse goods shelves's inner chamber has the connecting strip through spout sliding connection, the board is taken out to the right side fixedly connected with of connecting strip surface, take out the external atress piece of positive fixedly connected with of board, the right side sliding connection who takes out the board surface has fixed stop, the both ends of fixed stop surface all with the inner wall fixed connection of frame, the supplementary bearing block of lower part fixedly connected with of frame inner wall, the spout has been seted up to the upper surface of frame, the upper surface of frame has the removal push rod through spout sliding connection.

The movable push rod comprises a clamping frame, the back of the outer surface of the clamping frame is in sliding connection with the upper portion of an inner cavity of the frame through a sliding groove, a shaft rod is clamped on the front of the clamping frame, the inner cavity of the shaft rod is rotatably connected with the bottom end of a sliding motor through a rotating shaft, a sleeve is fixedly connected to the lower portion of the outer surface of the shaft rod, a push plate block is fixedly connected to the outer surface of the sleeve, an autorotation connecting rod is rotatably connected to the bottom end of the outer surface of the sleeve, and two ends of the autorotation connecting rod are rotatably connected with the outer surface of the sleeve.

The draw plate comprises a bearing plate, a left fixedly connected with slide bar on the outer surface of the bearing plate, the left side of the outer surface of the slide bar is connected with an inner cavity of an external stress block in a sliding manner, an upper surface of the bearing plate is fixedly connected with a tension bar, the top end of the tension bar is connected with the right side of the outer surface of the external stress block through a thick spring band, the upper portion of the outer surface of the tension bar is connected with a slide rail in a sliding manner, the top end of the slide rail is connected with the right side of the outer surface of the external stress block in a fixed manner, a round opening is formed in the front surface of the bearing plate, the inner cavity of the bearing plate is connected with an elastic telescopic rod through the round opening, and the left end of the elastic telescopic rod is connected with the outer surface of a fixed partition plate.

The auxiliary bearing block comprises a strip shell, a groove is formed in the upper portion of an inner cavity of the strip shell, an anti-skidding side edge sleeve is fixedly connected to the upper portion of the inner cavity of the strip shell through the groove, a connecting sleeve is fixedly connected to the right side of the outer surface of the anti-skidding side edge sleeve, the upper surface of the connecting sleeve is fixedly connected with the bottom end of a fixed partition plate, an elastic arm is fixedly connected to the lower surface of the connecting sleeve, and the bottom end of the elastic arm is fixedly connected with the bottom of the inner wall of the strip shell.

The push pedal piece includes little base block, the left side and the sheathed tube fixed surface of little base block surface are connected, the right side of little base block surface is through linking key fixedly connected with side lever, the both ends of side lever are all rotated and are connected with the rubber wheel, the surface of rubber wheel and the right side sliding connection of little base block surface.

The invention has the following beneficial effects:

1. when a user needs to take out a placed object from a warehouse shelf, the user takes off the dustproof sleeve, the movable push rod slides along the shelf frame through the system, when the movable push rod slides to the position of the object column which the user wants to take off, the movable push rod is rotated through the sliding motor, the pull plate is pushed out outwards under the action of the thrust of the external force block, the object placed above the pull plate is also pushed out of the shelf frame, the user can directly take out the object, then the movable push rod is reset through the rotation of the sliding motor, the pull plate is retracted into the interior of the shelf frame under the action of the tensile force, compared with a common warehouse, the device has higher automation degree, is simpler and more convenient compared with manual operation for taking out the object, and can confirm the object without taking out the object during the process of the object out of the shelf frame by the pull plate, thereby being very convenient in the sampling detection of a large-scale warehouse, the detection efficiency is improved, if the object on the goods shelf is the object after being boxed, the object is still taken out of the shelf frame by the taking-out plate, the object can be taken out of the plate top, the taking-out plate can serve as a supporting point of the object at the moment, the object is prevented from falling and being damaged, and the risk of damage to the object inside the warehouse is reduced.

2. Owing to take out the board and play the effect of mainly carrying the thing, so take out the board when the bearing, the right side atress of bearing plate is too big, if after long-term use, the bearing plate takes place deformation very easily, consequently, use the pulling force strip to provide extra holding power, the gravity that balanced bearing plate right side received, and the shock attenuation effect is stronger, can protect the object that prevents in the bearing plate top, reduce the shaking force that the object received, there is certain shock resistance, when external atress piece pushes out the bearing plate frame right, the extension of elastic telescopic rod, elastic telescopic rod possesses the elastic force this moment, after the removal push rod resets, elastic telescopic rod pulls back the bearing plate inside the frame, accomplish the recovery work.

3. The user is according to getting the thing position, will remove the push rod and slide to the column of object, control sliding motor rotates corresponding axostylus axostyle, the axostylus axostyle drives the sleeve pipe and rotates this moment, the sleeve pipe is rotating the in-process of degree, push pedal piece constantly extrudees external atress piece, make external atress piece promote to take out the board and slide to frame outside, and push pedal piece is after long-term the use, can be because of taking place the friction many times with external atress piece, and then lead to wearing and tearing, so push pedal piece is rotating the in-process, the rolling friction that uses rubber wheel and external atress piece replaces the static friction of side lever and external atress piece, thereby effectively reduce the wearing and tearing that push pedal piece takes place because of frictional force.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the warehouse rack of the present invention;

FIG. 3 is a schematic view of the present invention illustrating the structure of the moving push rod;

FIG. 4 is a schematic view of the construction of the drawplate of the present invention;

FIG. 5 is a schematic view of the construction of the auxiliary bearing block of the present invention;

fig. 6 is a schematic structural view of the push plate block of the present invention.

In the figure: the warehouse shelf 1, the dust cover 2, the sliding motor 3, the push rod 4, the shelf frame 11, the external stress block 12, the connecting strip 13, the fixed partition plate 14, the movable push rod 5, the clamping frame 51, the shaft lever 52, the sleeve 53, the rotation connecting rod 54, the auxiliary bearing block 6, the strip shell 61, the connecting sleeve 62, the anti-skid side edge sleeve 63, the elastic arm 64, the pulling plate 7, the bearing plate 71, the tension strip 72, the slide rail 73, the slide bar 74, the elastic telescopic rod 75, the pushing plate block 8, the small base block 81, the side lever 82 and the rubber wheel 83.

Detailed Description

One embodiment of the present invention will be described below with reference to fig. 1 to 6.

As shown in fig. 1 to 6, the automatic stereoscopic warehouse of the present invention includes a warehouse shelf 1, both sides of the outer surface of the warehouse shelf 1 are slidably connected with dust covers 2, both ends of the warehouse shelf 1 are rotatably connected with sliding motors 3, both sides of the outer surface of the sliding motors 3 are fixedly connected with push rods 4, and the inner cavities of the push rods 4 are fixedly connected with the inner cavities of the sliding motors 3 through wires.

The warehouse goods shelf 1 comprises a shelf frame 11, the inner wall of the shelf frame 11 is provided with a sliding groove, the inner cavity of the warehouse goods shelf 1 is connected with a connecting strip 13 through the sliding groove in a sliding way, the right side of the outer surface of the connecting strip 13 is fixedly connected with a drawing plate 7, the front side of the drawing plate 7 is fixedly connected with an external stress block 12, the right side of the outer surface of the drawing plate 7 is connected with a fixed clapboard 14 in a sliding way, two ends of the outer surface of the fixed clapboard 14 are fixedly connected with the inner wall of the shelf frame 11, the lower part of the inner wall of the shelf frame 11 is fixedly connected with an auxiliary bearing block 6, the upper surface of the shelf frame 11 is provided with a sliding groove, the upper surface of the shelf frame 11 is connected with a movable push rod 5 through the sliding groove in a sliding way, when a user needs to take out a placed object from the warehouse goods shelf 1, the user takes off a dust cover 2, the movable push rod 5 slides along the shelf frame 11 through a system, when the movable push rod 5 slides to the longitudinal position of the object that the user wants to take off, the sliding motor 3 rotates the moving push rod 5, at the moment, the drawing plate 7 is pushed outwards under the action of the pushing force of the external force receiving block 12, an object placed above the drawing plate 7 is also pushed out of the frame 11, a user can directly take out the object, then the sliding motor 3 resets the moving push rod 5 through rotation, the drawing plate 7 is retracted into the frame 11 under the action of the pulling force, compared with a common warehouse, the device has higher automation degree and is simpler and more convenient to take out compared with manual operation, in addition, in the process that the drawing plate 7 sends the object out of the frame 11, the user does not need to take out the object, the object can be confirmed, the device is very convenient in large-scale sampling detection, the detection efficiency is improved, if the object on the goods shelf is the object after being boxed, the drawing plate 7 still is above the drawing plate 7 after sending the object out of the frame 11, at the moment, the drawing plate can be used as a supporting point of the object, prevent that the object from dropping and breaking down, reduced the risk that the inside object of warehouse damaged.

The movable push rod 5 comprises a clamp frame 51, the back of the outer surface of the clamp frame 51 is connected with the upper part of the inner cavity of the frame 11 in a sliding mode through a sliding groove, a shaft rod 52 is clamped on the front face of the clamp frame 51, the inner cavity of the shaft rod 52 is rotatably connected with the bottom end of the sliding motor 3 through a rotating shaft, a sleeve 53 is fixedly connected to the lower part of the outer surface of the shaft rod 52, a push plate block 8 is fixedly connected to the outer surface of the sleeve 53, a rotation connecting rod 54 is rotatably connected to the bottom end of the outer surface of the sleeve 53, and two ends of the rotation connecting rod 54 are rotatably connected with the outer surface of the sleeve 53.

The drawable plate 7 comprises a bearing plate 71, the left side of the outer surface of the bearing plate 71 is fixedly connected with a slide bar 74, the left side of the outer surface of the slide bar 74 is connected with the inner cavity of the external stress block 12 in a sliding manner, the upper surface of the bearing plate 71 is fixedly connected with a tension bar 72, the top end of the tension bar 72 is fixedly connected with the right side of the outer surface of the external stress block 12 through a thick spring band, the upper part of the outer surface of the tension bar 72 is connected with a slide rail 73 in a sliding manner, the top end of the slide rail 73 is fixedly connected with the right side of the outer surface of the external stress block 12, the front surface of the bearing plate 71 is provided with a round opening, the inner cavity of the bearing plate 71 is fixedly connected with an elastic telescopic rod 75 through the round opening, the left end of the elastic telescopic rod 75 is fixedly connected with the outer surface of the fixed partition plate 14, and the drawable plate 7 plays a role of a main object carrying, so that the right side of the bearing plate 71 is over stressed when the drawable plate 7 bears a load, if after long-term use, bearing plate 71 takes place deformation very easily, consequently, use pulling force strip 72 to provide extra holding power, the gravity that balanced bearing plate 71 right side received, and the shock attenuation effect is stronger, can protect the object that prevents in bearing plate 71 top, reduce the vibrations power that the object received, there is certain shock resistance, when external atress piece 12 with bearing plate 71 push out frame 11 right, elastic expansion rod 75 extends, elastic expansion rod 75 possesses the elastic force this moment, after removal push rod 5 resets, elastic expansion rod 75 is inside with bearing plate 71 pull back frame 11, accomplish the work of retrieving.

The auxiliary bearing block 6 comprises a strip shell 61, the upper part of the inner cavity of the strip shell 61 is provided with a groove, the upper part of the inner cavity of the strip shell 61 is fixedly connected with an anti-skidding side sleeve 63 through the groove, the right side of the outer surface of the anti-skidding side sleeve 63 is fixedly connected with a connecting sleeve 62, the upper surface of the connecting sleeve 62 is fixedly connected with the bottom end of a fixed clapboard 14, the lower surface of the connecting sleeve 62 is fixedly connected with an elastic arm 64, the bottom end of the elastic arm 64 is fixedly connected with the bottom of the inner wall of the strip shell 61, due to the structural design of the device, objects placed on the non-bilateral pulling plates 7 have the final bearing object of gravity of the fixed clapboard 14, so that the bottom of the fixed clapboard 14 is greatly stressed, and the fixed clapboard 14 has small bottom area due to volume, so that the pressure of the fixed clapboard 14 to the bottom of the inner wall of the frame 11 is large, and the bottom of the inner wall of the frame 11 can deform after long-term use, and then lead to the inside fixed baffle 14 dislocation of device, so use supplementary bearing block 6 to protect the bottom of fixed baffle 14, protect when the upper surface of nipple 62 is extruded to the bottom of fixed baffle 14, after fixed baffle 14 atress bearing, the nipple 62 is extruded to the bottom of fixed baffle 14, and the elastic arm 64 of nipple 62 lower surface atress takes place elastic deformation and cushions this moment, reduces the impact force that nipple 62 received.

The push plate block 8 comprises a small base block 81, the left side of the outer surface of the small base block 81 is fixedly connected with the outer surface of the sleeve 53, the right side of the outer surface of the small base block 81 is fixedly connected with a side lever 82 through a connecting key, both ends of the side lever 82 are rotatably connected with rubber wheels 83, the outer surface of the rubber wheels 83 is slidably connected with the right side of the outer surface of the small base block 81, a user slides the movable push rod 5 to the longitudinal column of an object according to a fetching position, controls the sliding motor 3 to rotate the corresponding shaft rod 52, at the moment, the shaft rod 52 drives the sleeve 53 to rotate, the push plate block 8 continuously extrudes the external stress block 12 in the process of rotating by 90 degrees, so that the external stress block 12 pushes the pull plate 7 to slide towards the outside of the frame 11, and after the push plate block 8 is used for a long time, the push plate block 8 is abraded due to multiple times of friction with the external stress block 12, so that the push plate block 8 is rotated, the rolling friction between the rubber wheel 83 and the external stress block 12 is used to replace the static friction between the side rod 82 and the external stress block 12, so that the abrasion of the push plate block 8 caused by friction is effectively reduced.

The specific working process is as follows:

when a user needs to take out a placed object from a warehouse shelf 1, the user takes off a dustproof sleeve 2, a movable push rod 5 slides along a shelf frame 11 through a system, when the movable push rod 5 slides to the position of an object column which the user wants to take off, the movable push rod 5 is rotated through a sliding motor 3, a drawing plate 7 is pushed outwards under the action of the thrust of an external force block 12, the object placed above the drawing plate 7 is also pushed out of the shelf frame 11, the user can directly take out the object, then the sliding motor 3 resets the movable push rod 5 through rotation, the drawing plate 7 is retracted into the inside of the shelf frame 11 under the action of the tensile force, compared with a common warehouse, the device has higher automation degree and is simpler and more convenient to take out compared with manual operation, and the object can be confirmed without taking out the object by the user in the process that the drawing plate 7 sends the object out of the shelf frame 11, very convenient in the sampling inspection of large-scale warehouse, improved detection efficiency, if the object on the goods shelves is the object after the vanning, take out board 7 and see the object out of frame 11 after, the object is still taking out board 7 top, takes out the board this moment and can regard as the strong point of object, prevents that the object from dropping and breaking, has reduced the risk that the inside object of warehouse damaged.

Because the drawing plate 7 plays a main loading role, when the drawing plate 7 bears the load, the right side of the bearing plate 71 is stressed too much, if the drawing plate is used for a long time, the bearing plate 71 is easy to deform, therefore, the tension bar 72 is used for providing extra supporting force, the gravity borne by the right side of the bearing plate 71 is balanced, the damping effect is strong, objects above the bearing plate 71 can be protected, the vibration force borne by the objects is reduced, and the drawing plate has certain anti-vibration capability, when the external stress block 12 pushes the bearing plate 71 to the right out of the frame 11, the elastic telescopic rod 75 extends, the elastic telescopic rod 75 has elastic force, after the movable push rod 5 is reset, the elastic telescopic rod 75 draws the bearing plate 71 back into the frame 11, and the recovery work is completed.

Due to the structural design of the device, the object placed on the non-two-side drawing plate 7 is a fixed partition plate 14 as the final object bearing the gravity of the object, so that the stress of the bottom end of the fixed partition plate 14 is large, the fixed partition plate 14 is small in bottom area due to the size, the pressure of the fixed partition plate 14 on the bottom of the inner wall of the frame 11 is large, the bottom of the inner wall of the frame 11 is likely to deform after long-term use, and further the fixed partition plate 14 inside the device is dislocated, so that the bottom end of the fixed partition plate 14 is protected by the auxiliary bearing block 6, the protection effect is realized when the bottom end of the fixed partition plate 14 extrudes the connecting sleeve 62, after the fixed partition plate 14 bears the stress, the elastic arm 64 on the lower surface of the connecting sleeve 62 is stressed, the elastic deformation is buffered, and the impact force on the connecting sleeve 62 is reduced.

The user is according to getting the thing position, will remove push rod 5 and slide to the column of object, control sliding motor 3 rotates corresponding axostylus axostyle 52, axostylus axostyle 52 drives the sleeve pipe 53 and rotates this moment, sleeve pipe 53 is at the in-process of rotating 90, push away the continuous extrusion external atress piece 12 of plate 8, make external atress piece 12 promote to take out the board 7 and slide to frame 11 outside, and push away plate 8 is after long-term the use, can be because of taking place the friction many times with external atress piece 12, and then lead to wearing and tearing, so push away plate 8 is at the rotation in-process, the rolling friction that uses rubber wheel 83 and external atress piece 12 replaces the static friction of side lever 82 and external atress piece 12, thereby effectively reduce the wearing and tearing that push away plate 8 takes place because of frictional force.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.