阅读说明：本技术 紧急停止装置及电梯 (Emergency stop device and elevator ) 是由 早川智久 福田敏行 久保洋辅 于 2018-10-31 设计创作，主要内容包括：本发明的紧急停止装置包括制动机构和用于使制动机构的制动构件进行动作的动作机构。动作机构包括固定构件、可动构件、动作用施力构件和保持返回机构。保持返回机构包括保持构件、保持齿轮构件和保持驱动部。保持驱动部对保持构件的向解除与保持齿轮构件的卡合的方向的移动进行限制。而且,通过使保持构件和保持齿轮构件卡合,从而抵抗动作用施力构件的作用力并限制可动构件的移动。(An emergency stop device of the present invention includes a brake mechanism and an operating mechanism for operating a brake member of the brake mechanism. The operation mechanism includes a fixed member, a movable member, an operation urging member, and a holding return mechanism. The holding return mechanism includes a holding member, a holding gear member, and a holding drive portion. The holding drive unit restricts movement of the holding member in a direction to release engagement with the holding gear member. Then, the holding member and the holding gear member are engaged with each other, whereby the movement of the movable member is regulated against the biasing force of the operation biasing member.)

1. An emergency stop device, comprising:

a braking mechanism provided on an elevating body and stopping movement of the elevating body by clamping a guide rail for the elevating body to slide; and

an actuating mechanism for actuating a braking member of the braking mechanism,

the action mechanism includes:

a fixing member fixed to the elevating body;

a movable member movably supported by the fixed member;

a movement urging member that urges the movable member in a direction in which the brake mechanism operates; and

a holding return mechanism that holds the movable member against an urging force of the operation urging member,

the retention return mechanism includes:

a holding member provided on one of the fixed member and the movable member;

a holding gear member that is provided on the other of the fixed member and the movable member and is releasably engaged with the holding member; and

a holding drive unit that restricts movement of the holding member in a direction in which engagement with the holding gear member is released,

the movement of the movable member is restricted against the biasing force of the operation biasing member by engaging the holding member with the holding gear member.

2. Emergency stop device according to claim 1,

the operating mechanism includes a return drive mechanism for returning the brake mechanism from a braking state in which the brake mechanism operates to a standby state in which the brake mechanism does not operate,

the holding member has:

a first holding rod movably connected to the return drive mechanism and engaged with the holding gear member; and

a second holding lever movably supported by either the fixed member or the movable member and engaged with the holding gear member,

the return drive mechanism alternately engages and disengages the first holding lever and the second holding lever with the holding gear member.

3. Emergency stop device according to claim 2,

the holding gear member has a plurality of engaging teeth arranged along a direction in which the movable member moves,

when the engagement between the first holding lever and the holding gear member is released by the return drive mechanism, the first holding lever moves in a direction in which the movable member moves by at least a distance corresponding to one of the engagement tooth portions.

4. Emergency stop device according to claim 2,

the return driving mechanism comprises:

a return solenoid fixed to one of the fixed member and the movable member on which the holding member is provided;

a return piston movably supported in a cylindrical hole of the return solenoid and connected to the first holding rod; and

and a return biasing member that biases the return piston.

5. Emergency stop device according to claim 4,

the biasing force of the return biasing member is set to be larger than the biasing force of the operation biasing member.

6. Emergency stop device according to claim 4,

the electromagnetic attraction force in the return solenoid is set to be larger than the urging force of the operation urging member.

7. Emergency stop device according to claim 1,

the holding return mechanism includes a holding biasing member that biases the holding member toward the holding gear member.

8. Emergency stop device according to claim 1,

an angle of a contact surface of the holding gear member with the holding member with respect to a moving direction of the movable member is set to 90 degrees or an obtuse angle.

9. Emergency stop device according to claim 1 or 8,

an angle of a contact surface of the holding member, which is in contact with the holding gear member, with respect to a moving direction of the movable member is set to 90 degrees or an acute angle.

10. An elevator including a lifting body that performs lifting movement in a lifting passage, the elevator characterized by comprising:

a guide rail vertically disposed in the elevation channel and slidably supporting the elevation body;

an emergency stop device that stops movement of the vertically movable body based on a state of the vertically movable body;

a braking mechanism that is provided on the vertically movable body and stops movement of the vertically movable body by sandwiching the guide rail; and

an actuating mechanism which actuates a braking member of the braking mechanism,

the action mechanism includes:

a fixing member fixed to the elevating body;

a movable member movably supported by the fixed member;

a movement urging member that urges the movable member in a direction in which the brake mechanism operates; and

a holding return mechanism that holds the movable member against an urging force of the operation urging member,

the retention return mechanism includes:

a holding member provided on one of the fixed member and the movable member;

a holding gear member that is provided on the other of the fixed member and the movable member and is releasably engaged with the holding member; and

a holding drive unit that restricts movement of the holding member in a direction in which engagement with the holding gear member is released,

the movement of the movable member is restricted against the biasing force of the operation biasing member by engaging the holding member with the holding gear member.

Technical Field

The present invention relates to an emergency stop device for stopping a car in an emergency and an elevator having the emergency stop device.

Background

Generally, a rope type elevator has a main rope and a compensating rope connecting a car and a counterweight, and a long object such as a governor rope for detecting the speed of the car or the counterweight. In addition, provision is made in elevators for emergency stop devices to be provided as safety devices for automatically stopping the operation of the car when the speed of the car ascending and descending along the guide rails exceeds a prescribed value.

In recent years, there has been proposed an emergency stop device in which a brake mechanism of the emergency stop device is electrically operated without using a speed governor. As a conventional emergency stop device of this type, for example, there is a technique described in patent document 1. Patent document 1 describes a technique of including a wedge-shaped friction member that is separated from and in contact with a rail by a drive spring and an electromagnet device, and including a return motor that returns the electromagnet device while accumulating force in the drive spring.

Patent document 1 also describes: the return motor drives a return member for pushing and returning the electromagnet device to the holding position, the return member allowing the electromagnet device in the holding position to move to the release position. Patent document 1 also describes: the drive spring is energized by the return motor together with the return spring, the return motor is rotated by the return spring, and the return member is biased to the standby position.

Disclosure of Invention

Technical problem to be solved by the invention

However, in the technique described in patent document 1, the brake mechanism is held in an inoperative state only by the driving force of the electromagnet device as the holding driving portion. Therefore, the technique described in patent document 1 has a problem that a holding drive unit having a driving force larger than the biasing force of a drive spring serving as an operation biasing member needs to be provided, and the holding drive unit has a large capacity.

The present invention has an object to provide an emergency stop device and an elevator, which can suppress an increase in capacity of a holding drive unit in consideration of the above-described problems.

Technical scheme for solving technical problem

In order to solve the above-described problems, an object is achieved in which an emergency stop device stops movement of an elevating body based on a state of the elevating body moving up and down. The emergency stop device includes: a braking mechanism which is provided on the lifting body and stops the movement of the lifting body by sandwiching a guide rail for the lifting body to slide; and an actuating mechanism for actuating a braking member of the braking mechanism.

The operation mechanism includes a fixed member, a movable member, an operation urging member, and a holding return mechanism. The fixing member is fixed to the elevating body. The movable member is movably supported by the fixed member. The operation biasing member biases the movable member in a direction in which the brake mechanism operates. The holding return mechanism holds the movable member against the urging force of the urging member.

Further, the holding return mechanism includes a holding member, a holding gear member, and a holding drive portion. The holding member is provided on one of the fixed member and the movable member. Is provided on the other of the fixed member and the movable member and is releasably engaged with the holding member. The holding drive unit restricts movement of the holding member in a direction to release engagement with the holding gear member. The holding member and the holding gear member are engaged with each other, whereby the movement of the movable member is regulated against the biasing force of the operation biasing member.

In addition, the elevator comprises a lifting body which can lift and descend in the lifting channel,

the method comprises the following steps: a guide rail vertically disposed in the elevation channel and slidably supporting the elevation body; and an emergency stop device that stops movement of the vertically movable body based on a state of the vertically movable body moving up and down. The emergency stop device described above is used as the emergency stop device.

Effects of the invention

According to the emergency stop device and the elevator having the above-described configuration, the holding drive unit can be prevented from increasing in capacity.

Drawings

Fig. 1 is a schematic configuration diagram showing an elevator according to embodiment 1.

Fig. 2 is a front view showing an emergency stop device according to embodiment 1.

Fig. 3 is a perspective view showing a brake mechanism of the safety device according to embodiment 1.

Fig. 4 is an explanatory diagram illustrating a brake mechanism of the safety device according to embodiment 1.

Fig. 5 is an explanatory diagram illustrating a state in which an operation mechanism of the safety device according to embodiment 1 operates.

Fig. 6 is an explanatory diagram illustrating a return operation in the operating mechanism of the safety device according to embodiment 1.

Fig. 7 is an explanatory diagram illustrating a return operation in the operating mechanism of the safety device according to embodiment 1.

Fig. 8 is an explanatory diagram showing an operation mechanism of the safety device according to embodiment 2.

Fig. 9 is an explanatory diagram illustrating a state in which an operation mechanism of the safety device according to embodiment 2 operates.

Fig. 10 is an explanatory diagram illustrating a return operation in the operating mechanism of the safety device according to embodiment 2.

Fig. 11 is an explanatory diagram illustrating a return operation in the operating mechanism of the safety device according to embodiment 2.

Detailed Description

An emergency stop device and an elevator of the present embodiment will be described below with reference to fig. 1 to 11. In the drawings, the same reference numerals are given to the common members.

1. Embodiment 1

1-1 structural example of elevator

First, the structure of an elevator according to embodiment 1 (hereinafter referred to as "the present example") will be described with reference to fig. 1.

Fig. 1 is a schematic configuration diagram showing a configuration example of an elevator of this example.

As shown in fig. 1, the elevator 1 of the present example performs an elevator operation in an elevator shaft 110 formed in a building structure. The elevator 1 includes a car 120 representing one example of a lifting body on which people or freight are carried, a main rope 130, and a counterweight 140 representing another example of the lifting body. The elevator 1 includes a hoisting machine 100 and an emergency stop device 5.

The elevator 1 further includes a control device 170 and a diverting pulley 150. The hoistway 110 is formed in a building structure, and a machine room 160 is provided at the top thereof.

The hoisting machine 100 and the diverting pulley 150 are disposed in the machine room 160. The main ropes 130 are wound on a traction sheave shown in the drawing of the traction machine 100. A return sheave 150 on which the main ropes 130 are suspended is provided near the hoisting machine 100.

One end of the main rope 130 is connected to an upper portion of the car 120, and the other end of the main rope 130 is connected to an upper portion of the counterweight 140. By driving the hoisting machine 100, the car 120 and the counterweight 140 are raised and lowered in the hoistway 110. Hereinafter, the direction in which the car 120 and the counterweight 140 move up and down is referred to as the up-down direction Z.

The car 120 is slidably supported by a pair of guide rails 201A and 201B via a slider not shown. Similarly, the counterweight 140 is slidably supported by the counterweight-side guide rail 201C via a slide block not shown. The two guide rails 201A, 201B and the counterweight-side guide rail 201C extend in the lifting direction Z within the lifting channel 110.

The car 120 is provided with an emergency stop device 5 for emergency stopping the up-and-down movement of the car 120. The detailed structure of the emergency stop device 5 will be described later.

Further, a control device 170 is provided in the machine room 160. The control device 170 is connected to the car 120 via a connection wire not shown. Then, the control device 170 outputs a control signal to the car 120. Further, the controller 170 is provided in the hoistway 110, and is connected to a state detection sensor, not shown, for detecting the state of the car 120.

The information detected by the state detection sensor includes position information of the car 120 moving up and down in the hoistway 110, speed information of the car 120, acceleration information of the car 120, and the like. The position information of the car 120 is, for example, abnormal approach information detected when the interval between two cars 120 adjacent in the vertical direction in a multi-car elevator in which a plurality of cars 120 move up and down in the same hoistway 110 is closer than a predetermined interval.

The speed information of the car 120 is, for example, abnormal descending speed information detected when the descending speed of the car 120 is 1.3 times or more the rated speed. The acceleration information of the car 120 is, for example, abnormal acceleration information detected when the acceleration of the car 120 deviates from a preset pattern. The state detection sensor outputs the detected information to the control device.

The control device 170 determines whether the state of the car 120 is abnormal or normal based on the information detected by the state detection sensor. When it is determined that the state of the car 120 is abnormal, the control device 170 outputs an operation command signal to the safety device 5. Therefore, the safety device 5 operates based on the operation command signal from the control device 170, and stops the car 120.

In addition, in the present example, an example has been described in which the state detection sensor detects position information, velocity information, and acceleration information, but is not limited thereto. For example, the position information, the velocity information, and the acceleration information may be detected by different sensors, respectively. Further, the control device 170 may select and acquire position information, velocity information, acceleration information individually, or may acquire a plurality of pieces of information in combination.

Further, the control device 170 and the car 120 are not limited to the example of being connected by wire, and may be connected to transmit and receive signals by wireless.

1-2. construction of emergency stop device

Next, the detailed structure of the emergency stop device 5 will be described with reference to fig. 2 to 4.

Fig. 2 is a front view showing the emergency stop device 5.

As shown in fig. 2, the emergency stop device 5 includes two brake mechanisms 10A and 10B, an operating mechanism 11, a link mechanism 12, a first upper link 13, and a second upper link 14. The operating mechanism 11 and the interlocking mechanism 12 are disposed on a crosshead 121 provided at an upper portion of the car 120.

[ linkage mechanism ]

The link mechanism 12 includes a first operating lever 16, a second operating lever 17, a first operating shaft 18, a second operating shaft 19, a support bracket 20, and connecting shafts 25 and 26.

The support bracket 20 is provided at one end portion of the car 120 in a direction (hereinafter, referred to as a first direction X) perpendicular to the lifting direction Z and facing the guide rail 201A. The support bracket 20 is fixed to the crosshead 121. The support bracket 20 has a first stopper 21 and a second stopper 22. The first stopper 21 is provided at an upper end portion of the support bracket 20 in the lifting direction Z, and the second stopper 22 is provided at a lower end portion of the support bracket 20 in the lifting direction Z.

The first operating shaft 18 is provided on the support bracket 20. The first operating lever 16 is rotatably supported by a first operating shaft 18. The first operating lever 16 is formed in a substantially T-shape.

The first operating lever 16 has a rotating piece 16a and a connecting piece 16 b. The rotating piece 16a protrudes substantially perpendicularly from an intermediate portion of the connecting piece 16b in the longitudinal direction. Further, the rotating piece 16a passes between the first stopper 21 and the second stopper 22 provided on the support bracket 20, and protrudes toward the guide rail 201A arranged on one side of the first direction X of the car 120. The first upper link 13 is connected to an end portion of the rotating piece 16a on the opposite side to the connecting piece 16 b.

The first coupling shaft 25 is connected to a lower end portion of the connecting piece 16b in the lifting direction Z. Further, the first operating lever 16 is rotatably supported by the first operating shaft 18 at the connecting position of the rotating piece 16a and the connecting piece 16 b.

The second actuating rod 17 is provided with a second actuating shaft 19 at the other end portion of the crosshead 121 in the first direction X. The second operating lever 17 is rotatably supported by a second operating shaft 19. The second operating lever 17 is formed in a substantially T-shape similarly to the first operating lever 16.

The second operating lever 17 has a rotating piece 17a and a connecting piece 17 b. The rotating piece 17a protrudes substantially perpendicularly from an intermediate portion of the connecting piece 16b in the longitudinal direction. The rotating piece 17a projects toward a guide rail 201B disposed on the guide rail 201B, and the guide rail 201B is disposed on the other side in the first direction X of the car 120. The second upper link 14 is connected to an end portion of the rotating piece 17a on the opposite side to the connecting piece 17 b.

The second coupling shaft 26 is connected to an upper end portion of the connecting piece 17b in the lifting direction Z. Further, the second operating lever 17 is rotatably supported by the second operating shaft 19 at the connecting position of the rotating piece 17a and the connecting piece 17 b.

One end portion of the first connecting shaft 25 in the first direction X is connected to the connecting piece 16b of the first operating lever 16, and the other end portion of the first connecting shaft 25 in the first direction X is connected to an operating mechanism 11 described later. The other end of the second coupling shaft 26 in the first direction X is connected to the connecting piece 17b of the second operating lever 17, and one end of the second coupling shaft 26 in the first direction X is connected to the operating mechanism 11. The detailed structure of the operating mechanism 11 will be described later.

When the operating mechanism 11 operates, the first coupling shaft 25 and the second coupling shaft 26 move to one side in the first direction X. Therefore, the first operating lever 16 rotates about the first operating shaft 18 such that the end of the rotating piece 16a connected to the first upper link 13 faces upward in the vertical direction Z. The second operating lever 17 rotates about the second operating shaft 19 such that the end of the rotating piece 17a connected to the second upper link 14 faces upward in the vertical direction Z. As a result, the first upper link 13 and the second upper link 14 are pulled up in the upward and downward direction Z in a linked manner.

Further, the first brake mechanism 10A is connected to an end portion of the first upper link 138 opposite to the end portion connected to the rotating piece 16 a. The second brake mechanism 10B is connected to an end of the second upper link 14 opposite to the end connected to the rotating piece 17 a.

[ brake mechanism ]

The first brake mechanism 10A and the second brake mechanism 10B are provided at the lower end portions of the car 120 in the lifting direction Z. The first brake mechanism 10A is provided at one end of the car 120 in the first direction X so as to face the guide rail 201 a. The second brake mechanism 10B is provided at the other end portion of the car 120 in the first direction X so as to face the guide rail 201B.

Fig. 3 is a perspective view showing the brake mechanisms 10A, 10B of the emergency stop device 5. Since the first brake mechanism 10A and the second brake mechanism 10B have the same configuration, the first brake mechanism 10A will be described here. Hereinafter, the first brake mechanism 10 is simply referred to as a brake mechanism 10A. A direction orthogonal to the ascending and descending direction Z and orthogonal to the first direction X is set as a second direction Y.

As shown in fig. 3, the brake mechanism 10A has a pair of brake members 31 (only one side is shown in fig. 3), a pair of guide members 32, a linking member 33, and an urging member 34.

The pair of stoppers 31 sandwich the guide rail 201A therebetween, and are disposed opposite to each other in the second direction Y. In a state before the emergency stop device 5 is operated, a predetermined gap is formed between the pair of braking members 31 and the guide rail 201A.

One surface of the stopper 31 opposed to the guide rail 201A is formed parallel to one surface of the guide rail 201A, that is, parallel to the lifting direction Z. Further, the other surface of the stopper 31 opposite to the one surface facing the guide rail 201A is inclined so as to approach the guide rail 201A from below in the lifting direction Z toward above. Thus, the stopper 31 is formed in a wedge shape.

The pair of stoppers 31 are movably supported by the linking member 33 in the second direction Y. Further, the pair of stoppers 31 are linked by a linking member 33. The first upper tie rod 13 is connected to the coupling member 33. When the first upper link 13 is pulled upward in the vertical direction Z, the pair of stoppers 31 and the link member 33 move upward in the vertical direction Z.

Further, the pair of stoppers 31 are movably supported by the pair of guide members 32, 32. The pair of guide members 32, 32 are fixed to the car 120 by a frame (not shown in the figure) (see fig. 2). Further, the pair of guide members 32, 32 sandwich the guide rail 201A and the pair of stoppers 31, and are opposed to each other with a predetermined interval in the second direction Y.

One surface of the guide member 32 facing the stopper 31 is inclined so as to approach the guide rail 201A as going upward in the lifting direction Z. Therefore, the interval between the pair of guide members 32 and the surface facing the stopper 31 is narrowed toward the upper side in the lifting direction Z.

The biasing member 34 is disposed on the other surface of the guide member 32 opposite to the one surface facing the stopper 31. The urging member 34 is formed of, for example, a leaf spring having a U-shaped cross section cut in a horizontal direction orthogonal to the lifting direction Z. The opposite end portions of the urging member 34 sandwich the guide rail 201A and oppose each other with a predetermined interval in the second direction Y. The guide members 32 are fixed to the opposite surfaces of the urging member 34.

The biasing member 34 is not limited to a U-shaped plate spring, and may be a compression coil spring sandwiched between the guide member 32 and a frame, not shown.

When the pair of stoppers 31 moves upward in the vertical direction Z relative to the guide member 32, the pair of stoppers 31 move in a direction of approaching each other, that is, in a direction of approaching the guide rail 201A, via the guide member 32. When the pair of stoppers 31 move upward in the lifting direction Z, the pair of stoppers 31 are pressed against the guide rail 201A by the urging force of the urging member 34 via the guide member 32. This brakes the up-and-down movement of the car 120.

[ operating mechanism ]

Next, the operation mechanism 11 will be described with reference to fig. 4.

Fig. 4 is an explanatory diagram illustrating the operating mechanism 11.

As shown in fig. 4, the actuating mechanism 11 includes a fixed member 41, a first movable plate 45, a second movable plate 46, two guide rods 47, two actuating biasing members 48, a holding/returning mechanism 49, and a returning drive mechanism 50. The number of the guide rod 47 and the operation biasing member 48 is not limited to two, and three or more may be provided.

The fixing member 41 is fixed to a crosshead 121 provided at an upper end of the car 120. The fixing member 41 has a fixing face portion 42, a first opposing face portion 43, and a second opposing face portion 44. The fixing surface portion 42 is fixed to the crosshead 121 by fastening or a fixing method such as welding using a fixing bolt. The first facing surface portion 43 is connected to one end portion of the fixed surface portion 42 in the first direction X, and the second facing surface portion 44 is connected to the other end portion of the fixed surface portion 42 in the first direction X.

The first opposing surface portion 43 is substantially vertically continuous from one end portion of the fixed surface portion 42 in the second direction Y. Further, the second opposing surface portion 44 is substantially vertically continuous from the other end portion of the fixed surface portion 42 in the second direction Y. The first opposing surface portion 43 and the second opposing surface portion 44 face each other at a predetermined interval in the first direction X.

Two guide holes 43a, 43a and a support hole 43b are formed in the first opposing surface portion 43. Two guide holes 43a, 43a are formed at both ends of the first opposing surface portion 43 in the second direction Y. Also, the two guide holes 43a, 43a pass through the first opposing face 43 along the first direction X. Further, a support hole 43b is formed in an intermediate portion of the first opposing surface portion 43 in the second direction Y. Further, the support hole 43b passes through the first opposing surface portion 43 along the first direction X.

Two guide holes 44a, 44a are formed in the second opposing face 44. Two guide holes 44a, 44a are formed at both end portions of the second opposing surface portion 44 in the second direction Y. Further, the two guide holes 44a and 44a face the guide holes 43a provided in the first opposing face portion 43, respectively.

The guide rod 47 is slidably inserted into the guide hole 43a of the first opposing face portion 43 and the guide hole 44a of the second opposing face portion 44. The guide rod 47 is slidably supported by the first opposing surface portion 43 and the second opposing surface portion 44, and the guide rod 47 is disposed such that the axial direction thereof is substantially parallel to the first direction X.

The first movable plate 45 is fixed to one end of the guide rod 47 in the axial direction, i.e., one end in the first direction X. The second movable plate 46 is fixed to the other end portion of the guide rod 47 in the axial direction, i.e., the other end portion in the first direction X. The first movable plate 45 and the second movable plate 46 sandwich the fixing member 41 and are opposed to each other in the first direction X. The movable member is composed of the first movable plate 45, the second movable plate 46, and the guide rod 47.

The first movable plate 45 and the second movable plate 46 are each formed in a substantially flat plate shape. The first coupling shaft 25 is connected to a surface of the first movable plate 45 opposite to the surface facing the fixed member 41 and the second movable plate 46, that is, a surface on one side in the first direction X. The second coupling shaft 26 is connected to a surface of the second movable plate 46 opposite to the surface facing the fixed member 41 and the first movable plate 45, that is, the other surface in the first direction X. Therefore, the first coupling shaft 25 and the second coupling shaft 26 are coupled to each other via the first movable plate 45, the guide rod 47, and the second movable plate 46.

An operation biasing member 48 is interposed between the first movable plate 45 and the first facing surface 43 of the fixed member 41. The operation biasing member 48 is formed of, for example, a compression coil spring. The operation biasing member 48 is attached to the guide rod 47. As shown in fig. 4, in a normal state (hereinafter referred to as a "standby state") in which the operating mechanism 11 is not operating, that is, in normal operation of the elevator 1, the operating biasing member 48 is sandwiched in a compressed state between the first movable plate 45 and the first opposing surface portion 43 against its biasing force.

[ Return-holding mechanism ]

Further, the holding and returning mechanism 49 is disposed between the first movable plate 45 and the first opposing surface portion 43. The holding return mechanism 49 includes: a first holding rod 51 and a second holding rod 52 showing one example of a holding member, a holding gear member 53, a first rotation shaft 56, a second rotation shaft 57, a first support base 58, and a second support base 59. Further, the holding return mechanism 49 has a first rotary solenoid 54 and a second rotary solenoid 55 which represent one example of a holding drive portion.

A return piston 62 of the return drive mechanism 50 described later is connected to the first support base 58. The first support base 58 is attached to one surface of the first opposing surface portion 43 that faces the first movable plate 45. The first holding lever 51 is rotatably supported on a first support base 58 via a first rotation shaft 56.

The first holding rod 51, which represents an example of a pull-referenced rod, protrudes from the first support base 58 toward the first movable plate 45, i.e., toward one side in the first direction X. The first engagement hook piece 51a is formed at one end in the first direction X, which is an end of the first holding lever 51 opposite to the first support base 58. The first engaging hook piece 51a is releasably engaged with an engaging tooth portion 53a of a holding gear member 53 described later.

Further, a first rotary solenoid 54 is provided on the first rotary shaft 56. The first rotary solenoid 54 rotates the first holding rod 51 in a direction in which the first engagement hook piece 51a engages with the engagement tooth portion 53a by being energized. That is, the first rotary solenoid 54 restricts the movement of the first holding rod 51 in the direction of releasing the engagement with the holding gear member 53.

When the energization of the first rotary solenoid 54 is cut off, the first holding lever 51 is rotated in a direction in which the first engagement hook piece 51a is separated from the engagement tooth portion 53a by the biasing force of the operation biasing member 48 (see fig. 5).

Further, an elastic member such as a torsion coil spring may be provided on the first rotary shaft 56 to urge the first holding lever 51 in a direction in which the first rotary solenoid 54 resists operation, that is, in a direction in which the first engagement hook piece 51a is separated from the engagement tooth portion 53 a.

The second support base 59 is fixed to one surface of the first opposing surface portion 43 that faces the first movable plate 45. The second support base 59 is provided on the first opposing surface portion 43 so as to be spaced apart from the first support base 58 on one side in the second direction Y. The second holding lever 52 is rotatably supported on a second support base 59 by a second rotation shaft 57.

The second holding rod 52, which shows an example of the return prevention rod, protrudes from the second support base 59 toward the first movable plate 45, i.e., toward one side in the first direction X. The first holding lever 51 and the second holding lever 52 are opposed to each other with a space therebetween in the second direction Y.

The second holding lever 52 is formed with a second engagement hook piece 52a, similarly to the first holding lever 51. The second engagement hook piece 52a is provided at an end portion of the second holding lever 52 on the opposite side to the second support base 59, that is, at an end portion in the first direction X. The first engaging hook piece 51a and the second engaging hook piece 52a face each other with a space therebetween. The second engagement hook piece 52a is releasably engaged with an engagement tooth portion 53a of a holding gear member 53 described later.

Further, a second rotary solenoid 55 is provided on the second rotary shaft 57. The second rotary solenoid 55 rotates the second holding lever 52 in a direction in which the second engagement hook piece 52a engages with the engagement tooth portion 53a by energization. That is, the second rotary solenoid 55 restricts the movement of the second holding lever 52 in the direction of releasing the engagement with the holding gear member 53.

When the energization of the second rotary solenoid 55 is cut off, the second holding lever 52 is rotated in a direction in which the second engagement hook piece 52a is separated from the engagement tooth portion 53a by the biasing force of the operating biasing member 48 (see fig. 5).

Similarly to the first rotating shaft 56, the second rotating shaft 57 may be provided with an elastic member such as a torsion coil spring that biases the second holding lever 52 in a direction in which the second engaging hook piece 52a is separated from the engaging tooth portion 53 a.

The holding gear member 53 has a plurality of engaging tooth portions 53a and a shaft portion 53b provided with the plurality of engaging tooth portions 53 a. The shaft portion 53b is fixed to a surface of the first movable plate 45 facing the first facing surface portion 43. The shaft portion 53b projects from the first movable plate 45 toward the first opposing surface portion 43.

The plurality of engaging teeth 53a protrude from the side surface of the shaft 53 b. The plurality of engaging teeth 53a are arranged on the side surface of the shaft 53b along the first direction X. The engaging tooth portion 53a is formed in a substantially triangular shape. The other side of the engagement tooth portion 53a in the first direction X, that is, one surface on the first opposing surface portion 43 side is an inclined surface portion inclined with respect to the second direction Y.

The first engaging hook piece 51a of the first holding lever 51 and the second engaging hook piece 52a of the second holding lever 52 are detachably engaged with the engaging tooth portion 53 a. Then, the movement of the first movable plate 45 in the first direction X is restricted by the engagement tooth portion 53a engaging with the first engagement hook piece 51a and the second engagement hook piece 52 a.

Therefore, in the standby state, the force for holding the operation biasing member 48 in the compressed state is the driving force of the first rotary solenoid 54 and the second rotary solenoid 55 as the holding driving portions and the frictional force between the engaging tooth portion 53a and the first engaging hook piece 51a and the second engaging hook piece 52 a. Thus, since the frictional force between the first and second holding levers 51 and 52 and the holding gear member 53 is added to the driving force of the holding driving portion, the force for holding the operation urging member 48 in the compressed state can be increased. This can reduce the power to be supplied to the holding drive unit in the standby state, and can reduce the capacity of the holding drive unit.

Here, a first angle θ 1 with respect to the first direction X between the contact surfaces of the engaging tooth portion 53a with the first and second engaging hook pieces 51a and 52a and the side surface portion of the shaft portion 53b, that is, on the contact surface of the engaging tooth portion 53a is set to 90 degrees or an obtuse angle.

Further, a second angle θ 2 of the contact surfaces of the first engaging hook piece 51a and the second engaging hook piece 52a with the engaging tooth portion 53a with respect to the first direction X is set to 90 degrees or an acute angle. The first angle θ 1 is set to be substantially the same as the 180-second angle θ 2.

This makes it possible to firmly engage the engagement tooth portion 53a, the first engagement hook piece 51a, and the second engagement hook piece 52a, and to suppress an increase in the capacity of the first rotary solenoid 54 and the second rotary solenoid 55, which are holding drive portions, and to reduce the capacity.

[ drive mechanism for return ]

Next, the return drive mechanism 50 will be described.

The return drive mechanism 50 includes a return solenoid 61, a return piston 62, a return biasing member 63, and a spring seat 64 as return drive portions. The return solenoid 61 is fixed to a surface of the first opposing surface portion 43 opposing the second opposing surface portion 44.

Further, a cylindrical hole 61a penetrating in the first direction X is formed in the return solenoid 61. Further, the cylindrical hole 61a communicates with a support hole 43b provided on the first opposing surface portion 43. The return piston 62 passes through the cylindrical hole 61a in the first direction X.

One end portion of the return piston 62 in the first direction X protrudes from the cylindrical hole 61a of the return solenoid 61 toward one side in the first direction X. One end portion of the return piston 62 in the first direction X is inserted into the support hole 43b of the first opposing surface portion 43 from the cylindrical hole 61a of the return solenoid 61. Further, one end portion of the return piston 62 in the first direction X is slidably supported in the support hole 43b in the first direction X.

The first support base 58 is connected to a portion protruding from the first opposing surface 43 of the return piston 62 toward the first direction X. Therefore, when the return piston 62 moves in the first direction X, both the first support base 58 and the first holding rod 51 move in the first direction X.

The other end portion of the return piston 62 in the first direction X protrudes from the cylindrical hole 61a of the return solenoid 61 toward the other end portion in the first direction X. A substantially flat plate-shaped spring seat 64 is provided at the other end portion of the return piston 62 in the first direction X.

The return urging member 63 is constituted by, for example, a compression coil spring. The return biasing member 63 covers the outer periphery of the return solenoid 61 and is sandwiched between the first opposing surface portion 43 and the spring seat 64. The biasing force of the return biasing member 63 is set to be larger than the biasing force of the operation biasing member 48.

In the standby state, the coil 61b of the return solenoid 61 is not energized, and the return piston 62 is biased to the other side in the first direction X by the biasing force of the return biasing member 63. As described above, the first support base 58 is provided on the one end portion of the return piston 62 with the first opposing surface portion 43 interposed therebetween. Therefore, the first support base 58 is brought into contact with the first opposing surface portion 43, so that the return piston 62 can be prevented from being pulled out from the cylindrical hole 61a of the return solenoid 61.

When the coil 61b of the return solenoid 61 is energized, the return piston 62 moves to one side in the first direction X against the biasing force of the return biasing member 63 by the electromagnetic attraction force of the return solenoid 61 (see fig. 7A).

In this example, the example in which the compression coil spring is applied as the operation biasing member 48 and the return biasing member 63 is described, but the present invention is not limited to this. As the urging member for action 48 and the urging member for return 63, various other elastic members such as a plate spring and rubber can be applied.

1-3 example of operation of Emergency stop device

Next, an operation example of the safety device 5 having the above-described configuration will be described with reference to fig. 5 to 7B. Here, the operation of the operating mechanism 11 in the safety device 5 will be described.

Fig. 5 is an explanatory diagram illustrating a state in which the operating mechanism 11 operates. The state shown in fig. 5 will be referred to as a braking state hereinafter.

First, the operation of the operating mechanism 11 from the standby state to the braking state will be described with reference to fig. 5.

When the control device 170 determines that the descending speed of the car 120 has reached 1.3 times or more the rated speed when the car 120 (see fig. 1 and 2) descends, the control device 170 outputs an operation command signal to the safety device 5. Thereby, the energization of the first rotary solenoid 54 and the second rotary solenoid 55 as the holding drive portions is cut off. Thereby, the rotation of the first and second holding levers 51 and 52 in the direction of separating from the holding gear member 53 is released, and the first and second holding levers 51 and 52 are rotatable.

Therefore, as shown in fig. 5, the first holding lever 51 is rotated in a direction in which the first engagement hook piece 51a and the engagement tooth portion 53a are separated from each other around the first rotation shaft 56 by the biasing force of the operation biasing member 48. Similarly, the second holding lever 52 is rotated about the second rotation shaft 57 in a direction in which the second engagement hook piece 52a is separated from the engagement tooth portion 53a by the biasing force of the operation biasing member 48. As a result, the first movable plate 45 is released from moving to one side in the first direction X.

The first movable plate 45 is biased to one side in the first direction X by the biasing force of the operation biasing member 48. Therefore, the guide bar 47 connected to the first movable plate 45 is supported by the guide holes 43a, 44a of the fixed member 41, and moves to one side of the first direction X together with the first movable plate 45. Further, the second movable plate 46 connected to the guide bar 47 also moves to one side in the first direction X. That is, the movable member including the first movable plate 45, the second movable plate 46, and the guide rod 47 is supported by the fixed member 41 and moves to one side in the first direction X.

Thereby, the first coupling shaft 25 coupled to the first movable plate 45 and the second coupling shaft 26 coupled to the second movable plate 46 are moved to one side in the first direction X, and the first brake mechanism 10A and the second brake mechanism 10B (see fig. 2) are operated. As a result, the pair of braking members 31 (see fig. 3) of the first braking mechanism 10A and the second braking mechanism 10B are caused to sandwich the guide rail 201A, thereby mechanically stopping the elevating movement of the car 120.

Next, a return operation of the operating mechanism 11 from the braking state to the standby state will be described with reference to fig. 6A to 7B.

Fig. 6A to 7B are explanatory views showing the return operation of the operating mechanism 11.

First, as shown in fig. 6A, when the first rotary solenoid 54 and the second rotary solenoid 55 as the holding drive portions are energized, the first holding rod 51 and the second holding rod 52 rotate about the first rotating shaft 56 and the second rotating shaft 57 toward the holding gear member 53. Thereby, the first holding lever 51 and the second holding lever 52 are again engaged with the holding gear member 53.

Next, as shown in fig. 6B, the energization of the first rotary solenoid 54 is cut off. Then, the coil 61b of the return solenoid 61 of the return drive mechanism 50 is energized. Thereby, the return piston 62 moves to one side in the first direction X against the urging force of the return urging member 63 by the electromagnetic attraction force of the return solenoid 61. Therefore, the return urging member 63 is compressed between the spring seat 64 and the first opposing surface portion 43.

Further, by moving the return piston 62 to one side in the first direction X, the first holding rod 51 and the first support base 58 connected to the return piston 62 also move to one side in the first direction X. Then, the first holding lever 51 is rotated about the first rotation shaft 56 by the first holding lever 51 coming into contact with the inclined surface portion of the engagement tooth portion 53 a. Thereby, the first holding lever 51 moves to one side in the first direction X over one of the engagement teeth 53a provided on the holding gear member 53.

When the first holding lever 51 passes over the engagement tooth portion 53a, the first movable plate 45 is biased to one side in the first direction X by the operation biasing member 48. However, the second rotary solenoid 55 is energized, and the second holding lever 52 engages with the holding gear member 53. Further, the movement of the first movable plate 45 as the movable member to one side in the first direction X is restricted by the engagement of the second holding lever 52 and the holding gear member 53. Therefore, the first holding lever 51 can smoothly go over the engaging tooth portion 53 a.

As shown in fig. 7A, when the first holding lever 51 passes over the engagement tooth portion 53a and the first holding lever 51 and the holding gear member 53 are engaged with each other, the first rotary solenoid 54 is energized again to engage the first holding lever 51 and the holding gear member 53 with each other. Then, the energization of the second rotary solenoid 55 is cut off, and the energization of the coil 61b of the return solenoid 61 is cut off.

Thereby, the return piston 62 is biased to the other side in the first direction X by the biasing force of the return biasing member 63. Therefore, the first holding rod 51 and the first support base 58 connected to the return piston 62 are also biased toward the other side in the first direction X. Further, since the first holding lever 51 and the holding gear member 53 are engaged with each other, the first movable plate 45 is also biased to the other side in the first direction X by the holding gear member 53 and the first holding lever 51.

As described above, the biasing force of the return biasing member 63 is set to be larger than the biasing force of the operation biasing member 48. Therefore, the first movable plate 45 moves to the other side in the first direction X by a distance corresponding to one of the engagement teeth 53a against the biasing force of the operation biasing member 48. The guide rod 47 and the second movable plate 46 connected to the first movable plate 45 also move to the other side in the first direction X by a distance corresponding to one of the engagement teeth 53 a.

When the first movable plate 45 moves to the other side in the first direction X, the second holding lever 52 abuts on the inclined surface portion of the engagement tooth portion 53 a. Therefore, the second holding lever 52 rotates about the second rotation shaft 57. Therefore, the second holding lever 52 also passes over one of the engagement teeth 53 a. The second rotary solenoid 55 is energized again to engage the second holding rod 52 with the holding gear member 53. Thus, the first holding lever 51 and the second holding lever 52 alternately repeat the engagement with the holding gear member 53 and the release of the engagement with the holding gear member 53. Then, by repeating the above operation, the operating mechanism 11 is returned from the braking state shown in fig. 5 to the standby state shown in fig. 4.

Here, the length of one of the engagement teeth 53a in the first direction X is s, and the operation stroke W of the return piston 62 and the first holding rod 51 in the first direction X is set to a value satisfying the following expression 1.

[ formula 1]

s＜W＜2s

Thus, according to the actuating mechanism 11 of the present example, the first movable plate 45 can be returned from the position in the braking state to the position in the standby state by repeating the reciprocating movement of the return solenoid 61. Therefore, even if the amount of movement of the first movable plate 45 in the first direction X in the braking state and the standby state is increased, the operation stroke W of the return piston 62 in the first direction X is not changed. As a result, the operation stroke W of the return piston 62 can be reduced, and the return drive mechanism 50 can be downsized.

The operation stroke W of the first holding lever 51 is not limited to the above example. For example, the operation stroke W of the first holding rod 51 and the return piston 62 may be equal to or greater than the two engagement teeth 53 a.

Further, according to the actuating mechanism 11 of the present example, the return action can be performed by energizing and deenergizing, that is, by turning on/off, the respective solenoids of the return solenoid 61, the first rotary solenoid 54, and the second rotary solenoid 55. Therefore, the electric control at the time of the return operation in the operation mechanism 11 can be simplified.

2. Embodiment 2

Next, a second embodiment of the emergency stop device will be described with reference to fig. 8 to 11. Fig. 8 is an explanatory diagram showing an operation mechanism of the safety device according to embodiment 2. Fig. 9 is an explanatory diagram illustrating a state in which an operation mechanism of the safety device according to embodiment 2 operates. Fig. 10A, 10B, and 11 are explanatory diagrams illustrating an operation mechanism of the safety device according to embodiment 2.

The emergency stop device according to the second embodiment differs from the emergency stop device according to the first embodiment in the configurations of the holding and returning mechanism and the returning drive mechanism in the operating mechanism. Therefore, the holding and returning mechanism and the returning drive mechanism are described here, and the same reference numerals are given to the parts common to the operating mechanism 11 of the safety device 5 of the first embodiment, and redundant description is omitted.

As shown in fig. 8, the actuating mechanism 70 includes a fixed member 41, a first movable plate 45, a second movable plate 46, two guide rods 47, and two actuating biasing members 48, 48. The actuating mechanism 70 includes a holding return mechanism 71 and a return drive mechanism 90.

The fixing member 41 has a fixing face portion 42, a first opposing face portion 43, and a second opposing face portion 44. Further, an insertion hole 44b into which a return piston 92, which will be described later, is inserted is formed in the second opposing surface portion 44 of the second embodiment.

The holding return mechanism 71 has a first holding lever 51, a second holding lever 52, a holding gear member 53, a first rotation shaft 56, a second rotation shaft 57, a first support base 58, and a second support base 59. The first abutment pin 51b is provided on the first holding lever 51 of the second embodiment. Similarly, the second holding lever 52 is provided with a second abutment pin 52 b. Further, the holding return mechanism 71 has a holding drive mechanism 80.

The holding drive mechanism 80 includes a holding solenoid 72, a holding piston 73, an urging member 74, a holding spring seat 75, a first holding arm 81, and a second holding arm 82, which represent one example of a holding drive portion. The holding drive mechanism 80 includes a first arm rotation shaft 84, a second arm rotation shaft 85, and a first plate spring 86 and a second plate spring 87, which represent one example of a holding urging member.

The holding solenoid 72 is fixed to a bracket, not shown, and is disposed between the first opposing surface portion 43 and the second opposing surface portion 44 of the fixing member 41. The holding piston 73 passes through the cylindrical hole of the holding solenoid 72. The holding pin 73a is provided at one end in the axial direction of the holding piston 73. A substantially flat plate-shaped holding spring seat 75 is provided at the other end portion in the axial direction of the holding piston 73.

An urging member 74 is interposed between the holding spring seat 75 and the other end portion in the axial direction of the holding solenoid 72. The urging member 74 is formed of an elastic member such as a compression coil spring or rubber. In the standby state, the coil of the holding solenoid 72 is energized, and the holding piston 73 protrudes to one side in the axial direction against the urging force of the urging member 74.

In the example shown in fig. 8, the holding solenoid 72 and the holding piston 73 are arranged such that the axial directions thereof are substantially parallel to the first direction X. Therefore, the holding piston 73 moves in the first direction X. However, the arrangement direction of the holding solenoid 72 and the holding piston 73 is not limited to this, and the holding solenoid 72 and the holding piston 73 may be arranged such that the axial direction thereof is substantially parallel to the elevation direction Z. In this case, the holding piston 73 moves in the up-down direction Z.

The first holding arm 81 is rotatably supported on the first opposing surface portion 43 by a first arm rotation shaft 84. One end portion of the first holding arm 81 in the longitudinal direction protrudes from the first opposing surface portion 43 toward one side in the first direction X. The other end portion of the first holding arm 81 in the longitudinal direction protrudes from the first opposing surface portion 43 toward the other side in the first direction X.

The first leaf spring 86 is fixed to one end portion of the first holding arm 81 in the longitudinal direction. The first leaf spring 86 protrudes from one end portion of the first holding arm 81 in the longitudinal direction toward one side in the first direction X. Further, an end portion of the first plate spring 86 opposite to the first holding arm 81 abuts on a first abutting pin 51b provided on the first holding lever 51. The first leaf spring 86 is disposed on the other side of the first contact pin 51b in the second direction Y, that is, on the side where the first holding lever 51 is separated from the holding gear member 53.

The first roller 81a is provided at the other end portion of the first holding arm 81 in the longitudinal direction. The first roller 81a is disposed on one side of the first holding arm 81 in the second direction Y. In the standby state, the first roller 81a abuts against the holding pin 73a of the holding piston 73.

The second holding arm 82 is rotatably supported on the first opposing surface portion 43 by a second arm rotating shaft 85. Further, the second holding arm 82 is provided at a spacing from the first holding arm 81 on one side in the second direction Y. The first holding lever 81 and the second holding lever 82 are opposed to each other with a space therebetween in the second direction Y.

One end portion of the second holding arm 82 in the longitudinal direction protrudes from the first opposing surface portion 43 toward one side in the first direction X. The other end portion of the second holding arm 82 in the longitudinal direction protrudes from the first opposing surface portion 43 toward the other side in the first direction X.

The second plate spring 87 is fixed to one end portion of the second holding arm 82 in the longitudinal direction. The second plate spring 87 protrudes from one end portion of the second holding arm 82 in the longitudinal direction toward one side in the first direction X. Further, an end portion of the second leaf spring 87 on the opposite side to the second holding arm 82 abuts against a second abutment pin 52b provided on the second holding lever 52. The second plate spring 87 is disposed on one side of the second contact pin 52b in the second direction Y, that is, on the side where the second holding lever 52 is separated from the holding gear member 53.

The second roller 82a is provided at the other end portion of the second holding arm 82 in the longitudinal direction. The second roller 82a is disposed on the other side of the second holding arm 82 in the second direction Y. In the standby state, the second roller 82a abuts against the holding pin 73a of the holding piston 73.

Therefore, the holding pin 73a of the holding piston 73 is sandwiched between the first roller 81a of the first holding arm 81 and the second roller 82a of the second holding arm 82. The rotation of the first holding arm 81 and the second holding arm 82 in the direction in which the first roller 81a and the second roller 82a approach each other is restricted by the holding pin 73 a. That is, the rotation of the first holding arm 81 in the direction in which the first leaf spring 86 separates from the holding gear member 53 is restricted, and the rotation of the second holding arm 82 in the direction in which the second leaf spring 87 separates from the holding gear member 53 is restricted.

Further, the first holding lever 51 is held by the first leaf spring 86 and the first holding arm 81 via the first abutment pin 51 b. Therefore, the rotation of the first holding lever 51 in the direction of separating from the holding gear member 53 by the holding solenoid 72 via the first plate spring 86 and the first holding arm 81 is restricted. Similarly, the second holding lever 52 is held by the second leaf spring 87 and the second holding arm 82 via the second abutment pin 52 b. Therefore, the rotation of the second holding lever 52 in the direction of separating from the holding gear member 53 by the holding solenoid 72 is restricted via the second plate spring 87 and the second holding arm 82.

In the operating mechanism 70 according to the second embodiment, the first holding lever 51 and the second holding lever 52 are engaged with the holding gear member 53 in the standby state. Therefore, the frictional force between the first and second holding rods 51 and 52 and the holding gear member 53 is added to the force for holding the urging member for operation 48 in the compressed state against the urging force of the urging member for operation 48. As a result, in the operating mechanism 70 according to the second embodiment, the capacity of the holding solenoid 72 as the holding drive unit can be suppressed from increasing, and the capacity can be reduced.

Next, the return drive mechanism 90 will be described.

The return drive mechanism 90 includes a return solenoid 91, a return piston 92, a return biasing member 93, and a spring seat 94 as a return drive unit. The return solenoid 91 is fixed to a surface of the second opposing surface portion 44 that opposes the first opposing surface portion 43. The cylindrical hole 91a provided in the return solenoid 91 communicates with the insertion hole 44b provided in the second opposing face portion 44. Further, the cylindrical hole 91a faces a support hole 43B provided in the first opposing surface portion 43 (refer to fig. 10B).

The return piston 92 passes through the cylindrical hole 91a of the return solenoid 91 in the first direction X. One end portion of the return piston 92 in the first direction X protrudes from the cylindrical hole 91a of the return solenoid 91 toward one side in the first direction X. Further, one end portion of the return piston 92 is slidably inserted into a support hole 43b provided in the first opposing surface portion 43.

Further, one end portion of the return piston 92 protrudes from the first opposing surface portion 43 toward the first direction X. The first support base 58 is connected to a portion of one end of the return piston 92 that protrudes from the first opposing surface portion 43.

Further, the other end portion of the return piston 92 in the first direction X protrudes from the cylindrical hole 91a of the return solenoid 91 toward the other end portion in the first direction X. Further, the other end portion of the return piston 92 is inserted into an insertion hole 44b provided in the second opposing surface portion 44.

A substantially flat plate-like spring seat 94 is provided on the return piston 92. Further, a spring seat 94 is provided between the return solenoid 91 of the return piston 92 and the first opposing surface portion 43.

The return urging member 93 is formed of a member having elasticity such as a compression coil spring. Further, the return biasing member 93 covers the outer periphery of the return solenoid 91 and is sandwiched between the second opposing surface portion 44 and the spring seat 94.

In the standby state, the coil 91b of the return solenoid 91 is not energized, and the return piston 92 is biased toward the other side in the first direction X by the biasing force of the return biasing member 93. When the coil 91b of the return solenoid 91 is energized, the return piston 92 moves toward the other side in the first direction X against the urging force of the return urging member 93 by the electromagnetic attraction force of the return solenoid 91. The electromagnetic attraction force of the return solenoid 91, that is, the driving force for moving the return piston 92 toward the other side in the first direction X is set to be larger than the urging force of the operation urging member 48.

Next, the operation of the operating mechanism 70 according to the second embodiment will be described. First, the operation of the operating mechanism 70 from the standby state to the braking state will be described with reference to fig. 9.

Fig. 9 is an explanatory diagram illustrating a state in which the operating mechanism 70 operates.

As shown in fig. 9, when the energization of the holding solenoid 72 is cut off in accordance with an operation command signal from the control device 170 (see fig. 1), the holding piston 73 is biased to the other side in the first direction X by the biasing force of the biasing member 74. Therefore, the holding piston 73 moves to the other side in the first direction X, and the holding pin 73a is separated from the first roller 81a and the second roller 82 a.

Therefore, the rotation of the first and second holding arms 81 and 82 in the direction in which the first and second rollers 81a and 82a approach each other is released. As a result, the rotation of the first and second holding levers 51 and 52 in the direction of separation from the holding gear member 53 is released, and the first and second holding levers 51 and 52 can rotate.

Then, the first holding lever 51 and the second holding lever 52 are rotated in a direction away from the holding gear member 53 by the biasing force of the operation biasing member 48. Thereby, the first movable plate 45 is released from moving to one side in the first direction X. As a result, the movable member including the first movable plate 45, the second movable plate 46, and the guide rod 47 moves to one side in the first direction X, and the first brake mechanism 10A and the second brake mechanism 10B (see fig. 2) operate.

Next, a return operation of the operating mechanism 70 from the braking state to the standby state will be described with reference to fig. 10A to 11.

Fig. 10A to 11 are explanatory views showing the return operation of the operating mechanism 70.

First, as shown in fig. 10A, the holding solenoid 72 is energized. Thereby, the holding piston 73 moves to one side in the first direction X against the urging force of the urging member 74. The holding pin 73a of the holding piston 73 abuts against the first roller 81a of the first holding arm 81 and the second roller 82a of the second holding arm 82. Therefore, the first holding arm 81 rotates about the first arm rotation shaft 84 in a direction in which the first roller 81a and the second roller 82a are separated from each other. The second holding arm 82 rotates about the second arm rotation shaft 85 in a direction in which the second roller 82a is separated from the first roller 81 a.

Further, the first holding lever 51 is urged by a first plate spring 86 provided on the first holding arm 81, and is rotated toward the holding gear member 53. Further, the second holding lever 52 is urged by a second plate spring 87 provided on the second holding arm 82, and is rotated toward the holding gear member 53. Thereby, the first holding lever 51 and the second holding lever 52 are again engaged with the holding gear member 53.

At this time, the return solenoid 91 is also energized. Therefore, the return piston 92 moves toward the other side in the first direction X against the urging force of the return urging member 93. Further, the first holding rod 51 and the first support base 58 connected to the return piston 92 also move to the other side in the first direction X.

Next, as shown in fig. 10B, the energization of the return solenoid 91 is cut off. Thereby, the return piston 92 is biased by the return biasing member 93 and moves to one side in the first direction X. Further, the first holding rod 51 and the first support base 58 connected to the return piston 92 also move to one side in the first direction X.

When the first holding lever 51 moves to one side in the first direction X, the first holding lever 51 abuts on the inclined surface portion of the engagement tooth portion 53a of the holding gear member 53. The first holding lever 51 rotates in a direction away from the holding gear member 53 about the first rotation shaft 56 against the biasing force of the first plate spring 86. When the first holding lever 51 passes over one of the engagement teeth 53a, the first holding lever 51 is rotated toward the holding gear member 53 by the biasing force of the first plate spring 86. Then, the first holding lever 51 is again engaged with the holding gear member 53.

At this time, the second holding lever 52 engages with the holding gear member 53. Therefore, the movement of the first movable plate 45 as the movable member to one side in the first direction X is restricted by the engagement of the second holding lever 52 and the holding gear member 53. Therefore, the first holding lever 51 can smoothly go over the engaging tooth portion 53 a.

As shown in fig. 11, when the first holding lever 51 passes over the engagement tooth portion 53a and the first holding lever 51 and the holding gear member 53 are engaged, the return solenoid 91 is energized. Therefore, the return piston 92 is biased to the other side in the first direction X by the electromagnetic attraction force of the return solenoid 91. Therefore, the first holding rod 51 and the first support base 58 connected to the return piston 92 are also biased toward the other side in the first direction X. Further, since the first holding lever 51 and the holding gear member 53 are engaged with each other, the first movable plate 45 is also biased to the other side in the first direction X by the holding gear member 53 and the first holding lever 51.

As described above, the electromagnetic attraction force of the return solenoid 91 is set to be larger than the urging force of the operation urging member 48. Therefore, the movable member constituted by the first movable plate 45, the second movable plate 46, and the guide rod 47 moves to the other side in the first direction X by a distance corresponding to one of the engagement teeth 53a against the urging force of the operation urging member 48.

When the first movable plate 45 moves to the other side in the first direction X, the second holding lever 52 abuts on the inclined surface portion of the engagement tooth portion 53 a. The second holding lever 52 rotates in a direction away from the holding gear member 53 about the second rotation shaft 57 against the urging force of the second plate spring 87.

When the second holding lever 52 passes over one of the engagement tooth portions 53a, the second holding lever 52 is rotated toward the holding gear member 53 by the urging force of the second plate spring 87. Then, the second holding lever 52 is again engaged with the holding gear member 53. By repeating the above operation, the actuator 70 returns from the braking state shown in fig. 9 to the standby state shown in fig. 8.

The other configurations are the same as those of the safety device 5 according to embodiment 1, and therefore, the description thereof is omitted. The emergency stop device having the actuating mechanism 70 as described above can also obtain the same operational advantages as the emergency stop device 5 according to the first embodiment described above.

In addition, according to the actuating mechanism 70 of the second embodiment, the first and second holding levers 51 and 52 are held by the first and second leaf springs 86 and 87 during the return operation. Therefore, during the return operation, the holding solenoid 72 as the holding drive unit is kept energized in the on state, and only the return solenoid 91 as the return drive unit is repeatedly energized and de-energized. Thus, according to the actuating mechanism 70 of the second embodiment, the return operation can be performed by controlling the on/off of one solenoid, and the electric control at the time of the return operation can be further simplified.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications may be made without departing from the scope of the invention described in the claims.

In the above embodiment, the example in which the movement direction, which is the direction in which the movable member moves in the movement mechanism 11 or 70, is set to be substantially parallel to the first direction X has been described, but the present invention is not limited thereto. The movement direction of the movement mechanism 11, 70 may be set to be almost parallel to the lifting direction Z or the second direction Y, or may be a direction inclined with respect to the first direction X, the second direction Y, and the lifting direction Z.

In the above embodiment, the first holding lever 51, the second holding lever 52, and the return drive mechanisms 50 and 90 are disposed on the fixed member 41, and the holding gear member 53 is disposed on the first movable plate 45 as the movable member. For example, the first holding lever 51, the second holding lever 52, and the return drive mechanisms 50 and 90 may be disposed on the movable member, and the holding gear member 53 may be disposed on the fixed member 41.

The elevator body is not limited to the car 120, and the counterweight 140 may be applied. Also, an emergency stop device may be provided on the counterweight 140 to emergency-stop the elevating movement of the counterweight 140.

In the present specification, terms such as "parallel" and "orthogonal" are used, but they do not mean "parallel" and "orthogonal" strictly, and include "parallel" and "orthogonal" and may be in a state of "approximately parallel" and "approximately orthogonal" within a range in which the functions thereof can be exhibited.

Description of the reference symbols

1 elevator, 5 emergency stop device, 10A, 10 first brake mechanism, 11 actuating mechanism, 12 linkage mechanism, 13, 14 upper draw bar, 16 first actuating lever, 17 second actuating lever, 20 support bracket, 25 first connecting shaft, 26 second connecting shaft, 31 brake member, 32 guide member, 33 connecting member, 34 urging member, 41 fixed member, 43 first opposing surface portion, 43a, 44a guide hole, 43b support hole, 44 second opposing surface portion, 44b insertion hole, 45 first movable plate (movable member), 46 second movable plate (movable member), 47 guide rod (movable member), 48 actuating urging member, 49, 70 retaining return mechanism, 50, 90 return drive mechanism, 51 first retaining lever (retaining member), 51a first engaging hook piece, 51b first abutting pin, 52 second retaining lever (retaining member), 52a second engaging hook piece, 52b second contact pin, 53 holding gear member, 53a engaging tooth portion, 53b shaft portion, 54 first rotary solenoid (holding drive portion), 55 second rotary solenoid (holding drive portion), 56 first rotary shaft, 57 second rotary shaft, 58 st 1 support base, 59 second support base, 61, 91 return solenoid, 61a, 91a cylinder hole, 61b, 91b coil, 62, 92 return piston, 63, 93 return urging member, 72 holding solenoid (holding drive portion), 73 holding piston, 73a holding pin, 80 holding drive mechanism, 81 first holding arm, 81a first roller, 82 second holding arm, 82a second roller, 84 first arm rotary shaft, 85 second arm rotary shaft, 86 first plate spring (holding urging member), 87 second plate spring (holding urging member), 100 hoisting machine, 110 hoisting passage, 120 car (hoisting body), 121 crosshead, 130 main rope, 140 counterweight (lifting body) 150 return sheave, 160 machine room, 170 control device, 201A, 201B guide rail.