JP2019156567A - Emergency stop device and elevator - Google Patents

Abstract

To provide an emergency stop device and an elevator capable of suppressing an increase in capacity of a holding driving part.SOLUTION: An emergency stop device includes a braking mechanism for stopping movement of a lifting body and an operation mechanism 11 operating a braking member of the braking mechanism. The operation mechanism 11 includes a fixing member 41, a movable member 45, an operation energizing member 48, and a holding return mechanism 49. The holding return mechanism 49 includes holding members 51, 52, a holding gear member 53, and holding driving parts 54, 55. The holding driving parts 54, 55 regulate movement of locking between the holding members 51, 52 and the holding gear member 53 in a direction of releasing the locking. Since the holding members 51, 52 and the holding gear member 53 are locked with each other, the movement of the movable member 45 is regulated against energizing force of the operation energizing member 48.SELECTED DRAWING: Figure 4

Description

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

  In general, rope-type elevators are long items such as main ropes and compen- sion ropes that connect the car and the counterweight, and governor ropes that are used to detect the speed of the car or counterweight. have. The elevator is also provided with an emergency stop device that automatically stops the operation of the car when the speed of the car that moves up and down along the guide rail exceeds the specified value as a safety device. Has been.

  In recent years, an emergency stop device that electrically operates a braking mechanism of the emergency stop device without using a speed governor has been proposed. As this type of conventional emergency stop device, for example, there is a technique described in Patent Document 1. Japanese Patent Application Laid-Open No. H10-228667 describes a technique including a wedge-shaped friction member that is separated from and contacting a rail by a drive spring and an electromagnet device, and a return motor that restores the electromagnet device while accumulating energy in the drive spring.

  Patent Document 1 describes that the return motor drives a return member that pushes the electromagnet device back to the holding position, and the return member allows the holding position to move to the release position of the electromagnet device. . Furthermore, Patent Document 1 describes that the drive spring is stored together with the return spring by the return motor, the return motor is rotated by the return spring, and the return member is biased to the standby position.

JP 2009-227353 A

  However, in the technique described in Patent Document 1, the state where the braking mechanism is not operated is held only by the driving force of the electromagnet device that is the holding drive unit. Therefore, in the technique described in Patent Document 1, it is necessary to provide a holding drive unit having a driving force larger than the biasing force of the driving spring that is the biasing member for operation, and the holding drive unit increases in capacity. Had a problem.

  In view of the above-described problems, it is an object of the present invention to provide an emergency stop device and an elevator that can suppress an increase in capacity of a holding drive unit.

In order to solve the above problems and achieve the object, the emergency stop device is an emergency stop device that stops the movement of the lift body based on the state of the lift movement of the lift body. The emergency stop device includes a braking mechanism that is provided in the lifting body and holds the guide rail on which the lifting body slides to stop the movement of the lifting body, and an operation mechanism that operates a brake element of the braking mechanism. Yes.
The operating mechanism includes a fixed member, a movable member, an urging member for operation, and a holding and returning mechanism. The fixing member is fixed to the elevating body. The movable member is movably supported by the fixed member. The actuating biasing member biases the movable member in the direction in which the braking mechanism operates. The holding and returning mechanism holds the movable member against the biasing force of the biasing member for operation.
Further, the holding return mechanism includes a holding member, a holding gear member, and a holding drive unit. The holding member is provided on one of the fixed member and the movable member. Provided on the other of the fixed member and the movable member, the holding member is releasably locked. The holding drive unit restricts the movement of the holding member in the direction in which the locking with the holding gear member is released. Then, the holding member and the holding gear member are locked, thereby restricting the movement of the movable member against the biasing force of the actuating biasing member.

In addition, the elevator is an elevator including a lifting body that moves up and down in the hoistway.
A guide rail that is erected in the hoistway and slidably supports the elevating body, and an emergency stop device that stops the movement of the elevating body based on the state of the elevating movement of the elevating body. Further, the above-described emergency stop device is used as the safety device.

  According to the emergency stop device and the elevator configured as described above, an increase in capacity of the holding drive unit can be suppressed.

It is a schematic structure figure showing the elevator concerning the 1st example of an embodiment. 1 is a front view showing an emergency stop device according to a first embodiment. FIG. It is a perspective view which shows the braking mechanism of the emergency stop apparatus concerning 1st Embodiment. It is explanatory drawing which shows the action | operation mechanism of the emergency stop apparatus concerning the example of 1st Embodiment. It is explanatory drawing which shows the state which the action | operation mechanism of the emergency stop apparatus concerning the 1st Embodiment was operated. It is explanatory drawing which shows return operation | movement in the action | operation mechanism of the safety device concerning a 1st embodiment. It is explanatory drawing which shows return operation | movement in the action | operation mechanism of the safety device concerning a 1st embodiment. It is explanatory drawing which shows the action | operation mechanism of the emergency stop apparatus concerning 2nd Embodiment. It is explanatory drawing which shows the state which the action | operation mechanism of the emergency stop apparatus concerning 2nd Embodiment has operated. It is explanatory drawing which shows the return operation | movement in the action | operation mechanism of the emergency stop apparatus concerning 2nd Embodiment. It is explanatory drawing which shows the return operation | movement in the action | operation mechanism of the emergency stop apparatus concerning 2nd Embodiment.

  Hereinafter, an emergency stop device and an elevator according to an embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the common member in each figure.

1. First embodiment example 1-1. Configuration Example of Elevator First, a configuration of an elevator according to a first embodiment (hereinafter referred to as “this example”) will be described with reference to FIG.
FIG. 1 is a schematic configuration diagram illustrating a configuration example of the elevator according to the present example.

  As shown in FIG. 1, the elevator 1 of this example moves up and down in a hoistway 110 formed in a building structure. The elevator 1 includes a passenger car 120 that shows an example of a lifting body on which people and luggage are placed, a main rope 130, and a counterweight 140 that shows another example of the lifting body. The elevator 1 also includes a hoisting machine 100 and an emergency stop device 5.

  Further, the elevator 1 includes a control device 170 and a warping vehicle 150. In addition, the hoistway 110 is formed in a building structure, and the machine room 160 is provided in the top part.

  In the machine room 160, a hoisting machine 100 and a curling wheel 150 are arranged. A main rope 130 is wound around the sheave shown in the drawing of the hoisting machine 100. Further, in the vicinity of the hoisting machine 100, a warping wheel 150 on which the main rope 130 is mounted is provided.

  The upper end of the car 120 is connected to one end of the main rope 130, and the upper portion of the counterweight 140 is connected to the other end of the main rope 130. When the hoisting machine 100 is driven, the car 120 and the counterweight 140 move up and down 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 and down direction Z.

  The car 120 is slidably supported by the two guide rails 201A and 201B via a slider (not shown). Similarly, the counterweight 140 is slidably supported by the weight side guide rail 201C via a slider (not shown). The two guide rails 201 </ b> A and 201 </ b> B and the weight side guide rail 201 </ b> C extend along the ascending / descending direction Z in the hoistway 110.

  In addition, the car 120 is provided with an emergency stop device 5 that performs an emergency stop on the lifting and lowering movement of the car 120. The detailed configuration of the emergency stop device 5 will be described later.

  Further, a control device 170 is installed in the machine room 160. The control device 170 is connected to the car 120 via connection wiring (not shown). Then, the control device 170 outputs a control signal to the car 120. Further, the control device 170 is installed in the hoistway 110 and connected to a state detection sensor (not shown) that detects the state of the car 120.

  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. As the position information of the car 120, for example, in a multi-car elevator in which a plurality of cars 120 move up and down in the same hoistway 110, the distance between two vertically adjacent cars 120 is closer than a predetermined distance. It is the abnormal approach information detected at the time.

  The speed information of the car 120 is, for example, abnormal descent speed information detected when the descent speed of the car 120 reaches 1.3 times or more of 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 the controller 170 determines that the state of the car 120 is abnormal, the controller 170 outputs an operation command signal to the safety device 5. Accordingly, the emergency stop device 5 operates based on the operation command signal from the control device 170 to stop the car 120.

  In this example, the state detection sensor detects the position information, the speed information, and the acceleration information. However, the present invention is not limited to this. For example, position information, speed information, and acceleration information may be detected by different sensors. Furthermore, the control device 170 may select and acquire position information, velocity information, and acceleration information alone, or may acquire a combination of a plurality of pieces of information.

  Note that the controller 170 and the car 120 are not limited to the example of being connected by wire, and may be connected so that signals can be transmitted and received wirelessly.

1-2. Next, a detailed configuration of the safety device 5 will be described with reference to FIGS.
FIG. 2 is a front view showing the safety device 5.

  As shown in FIG. 2, the safety device 5 includes two braking mechanisms 10 </ b> A and 10 </ b> B, an operating mechanism 11, an interlocking mechanism 12, a first lifting bar 13, and a second lifting bar 14. Yes. The operating mechanism 11 and the interlocking mechanism 12 are disposed on a cross head 121 provided on the upper portion of the car 120.

[Interlock mechanism]
The interlocking 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 of a direction (hereinafter referred to as a first direction X) that is orthogonal to the ascending / descending direction Z of the car 120 and faces the guide rail 201A. Further, the support bracket 20 is fixed to the cross head 121. The support bracket 20 has a first stopper 21 and a second stopper 22. The first stopper 21 is provided at the upper end of the support bracket 20 in the up-and-down direction Z, and the second stopper 22 is provided at the lower end of the support bracket 20 in the up-and-down direction Z.

  The support bracket 20 is provided with a first operating shaft 18. A first operating lever 16 is rotatably supported on the 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 16b. The rotating piece 16a protrudes substantially perpendicularly from an intermediate portion in the longitudinal direction of the connecting piece 16b. The rotating piece 16a is inserted between the first stopper 21 and the second stopper 22 provided on the support bracket 20 and directed toward the guide rail 201A disposed on one side in the first direction X of the car 120. Protruding. The first lifting rod 13 is connected to the end of the rotating piece 16a opposite to the connecting piece 16b.

  The first connecting shaft 25 is connected to the lower end of the connecting piece 16b in the up-down direction Z. Then, the first operating lever 16 is rotatably supported by the first operating shaft 18 at a connecting portion between the rotating piece 16a and the connecting piece 16b.

  The second operating lever 17 is provided with a second operating shaft 19 at the other end of the cross head 121 in the first direction X. A second operating lever 17 is rotatably supported on the second operating shaft 19. Similar to the first operating lever 16, the second operating lever 17 is formed in a substantially T shape.

  The second operating lever 17 has a rotating piece 17a and a connecting piece 17b. The rotating piece 17a protrudes substantially perpendicularly from an intermediate portion in the longitudinal direction of the connecting piece 16b. And the rotation piece 17a protrudes toward the guide rail 201B arrange | positioned at the guide rail 201B arrange | positioned at the other side of the 1st direction X of the passenger car 120. The second lifting rod 14 is connected to the end of the rotating piece 17a opposite to the connecting piece 17b.

  A second connecting shaft 26 is connected to the upper end of the connecting piece 17b in the up-down direction Z. Then, the second operating lever 17 is rotatably supported by the second operating shaft 19 at a connection portion between the rotating piece 17a and the connecting piece 17b.

  One end of the first connecting shaft 25 in the first direction X is connected to the connection piece 16b of the first operating lever 16, and the other end of the first connecting shaft 25 in the first direction X is described later. It is connected to the operating mechanism 11. The other end of the second connecting 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 connecting shaft 26 in the first direction X is It is connected to the operating mechanism 11. The detailed configuration of the operating mechanism 11 will be described later.

  When the operation mechanism 11 operates, the first connection shaft 25 and the second connection shaft 26 move toward one side in the first direction X. Thus, the first operating lever 16 rotates about the first operating shaft 18 so that the end of the rotating piece 16a to which the first lifting rod 13 is connected faces upward in the ascending / descending direction Z. The second operating lever 17 rotates about the second operating shaft 19 so that the end of the rotating piece 17a to which the second lifting rod 14 is connected faces upward in the ascending / descending direction Z. As a result, the first lifting bar 13 and the second lifting bar 14 are interlocked and pulled upward in the up-and-down direction Z.

  Further, the first braking mechanism 10A is connected to the end of the first pulling rod 13 on the side opposite to the end to which the rotating piece 16a is connected. And the 2nd braking mechanism 10B is connected to the edge part on the opposite side to the edge part in which the rotation piece 17a in the 2nd raising rod 14 was connected.

[Brake mechanism]
The first braking mechanism 10 </ b> A and the second braking mechanism 10 </ b> B are disposed at the lower end of the elevator car 120 in the up-and-down direction Z. The first braking mechanism 10 </ b> A is disposed at one end portion in the first direction X of the car 120 so as to face the guide rail 201 </ b> A. Further, the second braking mechanism 10B is disposed opposite to the guide rail 201B at the other end portion in the first direction X of the car 120.

  FIG. 3 is a perspective view showing the braking mechanisms 10 </ b> A and 10 </ b> B of the emergency stop device 5. Since the first braking mechanism 10A and the second braking mechanism 10B have the same configuration, only the first braking mechanism 10A will be described here. Hereinafter, the first braking mechanism 10 is simply referred to as a braking mechanism 10A. In addition, a direction orthogonal to the ascending / descending direction Z and also orthogonal to the first direction X is defined as a second direction Y.

  As shown in FIG. 3, the braking mechanism 10 </ b> A includes a pair of brake elements 31 (only one side is shown in FIG. 3), a pair of guide members 32 and 32, a connecting member 33, and an urging member 34. is doing.

  The pair of brake elements 31 are arranged to face each other in the second direction Y with the guide rail 201A interposed therebetween. And in the state before the emergency stop device 5 operates, a predetermined space is formed between the pair of brake elements 31 and the guide rail 201A.

  One surface of the brake element 31 facing the guide rail 201A is formed in parallel with one surface of the guide rail 201A, that is, in parallel with the up-and-down direction Z. Further, the other surface of the brake 31 opposite to the one surface facing the guide rail 201A is inclined so as to approach the guide rail 201A as it goes from the lower side to the upper side in the ascending / descending direction Z. Therefore, the brake element 31 is formed in a wedge shape.

  The pair of brake elements 31 are supported by the connecting member 33 so as to be movable in the second direction Y. Further, the pair of brake elements 31 are connected by a connecting member 33. The first pulling rod 13 is connected to the connecting member 33. Then, when the first lifting rod 13 is pulled up in the up-and-down direction Z, the pair of brake elements 31 and the connecting member 33 move upward in the up-and-down direction Z.

  The pair of brake elements 31 are supported by a pair of guide members 32 and 32 so as to be movable. A pair of guide members 32 and 32 are being fixed to the passenger car 120 (refer FIG. 2) via the frame not shown. Further, the pair of guide members 32, 32 face each other with a predetermined interval in the second direction Y with the guide rail 201 </ b> A and the pair of brake elements 31 interposed therebetween.

  One surface of the guide member 32 facing the brake element 31 is inclined so as to approach the guide rail 201A as it goes upward in the ascending / descending direction Z. For this reason, the distance between the surfaces of the pair of guide members 32, 32 facing the brake element 31 becomes narrower in the upward / downward direction Z.

  An urging member 34 is disposed on the other surface of the guide member 32 opposite to the one surface facing the brake element 31. For example, the urging member 34 is configured by a leaf spring having a U-shaped cross-section cut in a horizontal direction orthogonal to the lifting / lowering direction Z. Both end portions of the urging member 34 face each other with a predetermined interval in the second direction Y with the guide rail 201A interposed therebetween. And the guide member 32 is fixed to the mutually opposing surface in the both ends of the urging | biasing member 34. As shown in FIG.

  The urging member 34 is not limited to a U-shaped leaf spring, and may be interposed between the guide member 32 and a frame (not shown) using, for example, a compression coil spring. .

  When the pair of brake elements 31 moves relative to the guide member 32 in the up-and-down direction Z, the pair of brake elements 31 move in the direction approaching each other by the guide member 32, that is, the direction approaching the guide rail 201A. To do. Further, when the pair of brake elements 31 moves upward in the up-and-down direction Z, the pair of brake elements 31 is pressed against the guide rail 201 </ b> A by the urging force of the urging member 34 via the guide member 32. Thereby, the raising / lowering movement of the car 120 is braked.

[Operating mechanism]
Next, the operation mechanism 11 will be described with reference to FIG.
FIG. 4 is an explanatory view showing the operation mechanism 11.

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

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

  The first facing surface portion 43 continues substantially perpendicularly along the second direction Y from one end portion of the fixed surface portion 42. Further, the second facing surface portion 44 continues substantially vertically from the other end portion of the fixed surface portion 42 along the second direction Y. The first facing surface portion 43 and the second facing surface portion 44 face each other with a predetermined interval in the first direction X.

  Two guide holes 43 a and 43 a and a support hole 43 b are formed in the first facing surface portion 43. The two guide holes 43 a and 43 a are formed at both ends of the first facing surface portion 43 in the second direction Y. The two guide holes 43 a and 43 a penetrate the first facing surface portion 43 along the first direction X. Further, the support hole 43 b is formed in an intermediate portion of the first facing surface portion 43 in the second direction Y. The support hole 43b penetrates the first facing surface portion 43 along the first direction X.

  Two guide holes 44 a and 44 a are formed in the second facing surface portion 44. The two guide holes 44 a and 44 a are formed at both ends of the second facing surface portion 44 in the second direction Y. The two guide holes 44a and 44a face the guide holes 43a provided in the first facing surface portion 43, respectively.

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

  A first movable plate 45 is fixed to one end of the guide rod 47 in the axial direction, that is, one end in the first direction X. A second movable plate 46 is fixed to the other end portion of the guide rod 47 in the axial direction, that is, the other end portion in the first direction X. The first movable plate 45 and the second movable plate 46 face each other in the first direction X with the fixed member 41 interposed therebetween. The first movable plate 45, the second movable plate 46, and the guide rod 47 constitute a movable member.

  The first movable plate 45 and the second movable plate 46 are each formed in a substantially flat plate shape. The first connecting 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 connecting 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 of the first direction X. ing. Therefore, the first connecting shaft 25 and the second connecting shaft 26 are connected via the first movable plate 45, the guide rod 47, and the second movable plate 46.

  An urging member for operation 48 is interposed between the first movable plate 45 and the first facing surface portion 43 of the fixed member 41. The actuating biasing member 48 is constituted by, for example, a compression coil spring. The actuating biasing member 48 is attached to the guide rod 47. As shown in FIG. 4, in the normal state in which the operation mechanism 11 is not operated (hereinafter referred to as “standby state”), that is, in the normal operation of the elevator 1, the operation biasing member 48 receives the biasing force. Accordingly, the first movable plate 45 and the first facing surface portion 43 are interposed in a compressed state.

[Retention mechanism]
A holding / returning mechanism 49 is disposed between the first movable plate 45 and the first facing surface portion 43. The holding return mechanism 49 includes a first holding lever 51 and a second holding lever 52, an example of a holding member, a holding gear member 53, a first rotating shaft 56, a second rotating shaft 57, and a first support. A base 58 and a second support base 59 are provided. The holding return mechanism 49 includes a first rotary solenoid 54 and a second rotary solenoid 55 that show an example of a holding drive unit.

  The first support base 58 is connected with a return plunger 62 of a return drive mechanism 50 described later. The first support base 58 is placed on one surface of the first facing surface portion 43 that faces the first movable plate 45. The first holding lever 51 is rotatably supported by the first support base 58 via the first rotation shaft 56.

  The first holding lever 51, which is an example of a pulling lever, protrudes from the first support base 58 toward the first movable plate 45, that is, toward one side in the first direction X. A first locking hook piece 51 a is formed at the end of the first holding lever 51 opposite to the first support base 58, that is, at one end in the first direction X. The first locking hook piece 51a is releasably locked to a locking tooth portion 53a of a holding gear member 53 described later.

  The first rotary shaft 56 is provided with a first rotary solenoid 54. When the first rotary solenoid 54 is energized, the first holding lever 51 is rotated in a direction in which the first locking hook piece 51a is locked with the locking tooth portion 53a. In other words, the first rotary solenoid 54 restricts movement in the direction in which the first holding lever 51 is unlocked from the holding gear member 53.

  When the energization of the first rotary solenoid 54 is interrupted, the first holding lever 51 causes the first locking hook piece 51a to be separated from the locking tooth portion 53a by the biasing force of the actuating biasing member 48. It rotates in the direction (see FIG. 5).

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

  The second support base 59 is fixed to one surface of the first facing surface portion 43 that faces the first movable plate 45. Further, the second support base 59 is disposed on the first facing surface portion 43 at a distance from the first support base 58 on one side in the second direction Y. A second holding lever 52 is rotatably supported on the second support base 59 via a second rotation shaft 57.

  The second holding lever 52, which is an example of a return prevention lever, protrudes from the second support base 59 toward the first movable plate 45, that is, toward one side in the first direction X. The first holding lever 51 and the second holding lever 52 oppose each other with an interval in the second direction Y.

  Similar to the first holding lever 51, the second holding lever 52 is formed with a second locking hook piece 52 a. The second locking hook piece 52 a is provided at the end of the second holding lever 52 opposite to the second support base 59, that is, at one end in the first direction X. The first locking hook piece 51a and the second locking hook piece 52a are opposed to each other with a space therebetween. The second locking hook piece 52a is releasably locked to a locking tooth portion 53a of a holding gear member 53 described later.

  The second rotary shaft 57 is provided with a second rotary solenoid 55. When the second rotary solenoid 55 is energized, the second holding lever 52 is rotated in a direction in which the second locking hook piece 52a is locked with the locking tooth portion 53a. That is, the second rotary solenoid 55 restricts the movement of the second holding lever 52 in the direction in which the engagement with the holding gear member 53 is released.

  When the energization of the second rotary solenoid 55 is interrupted, the second holding lever 52 causes the second locking hook piece 52a to be separated from the locking tooth portion 53a by the biasing force of the actuating biasing member 48. It rotates in the direction (see FIG. 5).

  Similarly to the first rotation shaft 56, the torsion coil spring that urges the second holding lever 52 in the direction in which the second locking hook piece 52a is separated from the locking tooth portion 53a. An elastic member such as may be provided.

  The holding gear member 53 includes a plurality of locking tooth portions 53a and a shaft portion 53b provided with the plurality of locking tooth portions 53a. The shaft portion 53 b is fixed to one surface of the first movable plate 45 that faces the first facing surface portion 43. The shaft portion 53 b protrudes from the first movable plate 45 toward the first facing surface portion 43.

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

  A first locking hook piece 51a of the first holding lever 51 and a second locking hook piece 52a of the second holding lever 52 are detachably locked to the locking tooth portion 53a. And the movement to the 1st direction X of the 1st movable board 45 is controlled because the latching tooth part 53a, the 1st latching hook piece 51a, and the 2nd latching hook piece 52a are latched.

  Therefore, in the standby state, the force for holding the actuating biasing member 48 in a compressed state is the driving force of the first rotary solenoid 54 and the second rotary solenoid 55 that are holding driving portions, the locking tooth portion 53a, and the first. This is the frictional force between the locking hook piece 51a and the second locking hook piece 52a. Thus, since the frictional force of the first holding lever 51, the second holding lever 52, and the holding gear member 53 is added to the driving force of the holding drive unit, the force for holding the actuating biasing member 48 in a compressed state is generated. Can strengthen. As a result, the electric power supplied to the holding drive unit in the standby state can be weakened, and the capacity of the holding drive unit can be reduced.

  Here, between the contact surface of the locking tooth portion 53a with the first locking hook piece 51a and the second locking hook piece 52a and the side surface portion of the shaft portion 53b, that is, the contact surface of the locking tooth portion 53a. The first angle θ1 with respect to the direction X of 1 is set to 90 degrees or an obtuse angle.

  In addition, the second angle θ2 of the contact surface of the first locking hook piece 51a and the second locking hook piece 52a with the locking tooth portion 53a with respect to the first direction X is set to 90 degrees or an acute angle. Further, the first angle θ1 is set to be substantially the same as 180 degrees−the second angle θ2.

  As a result, the locking tooth portion 53a, the first locking hook piece 51a and the second locking hook piece 52a can be firmly locked, and the first rotary solenoid 54 and the second rotary solenoid which are holding drive units. The increase in capacity of 55 can be suppressed and the capacity can be reduced.

[Return drive mechanism]
Next, the return drive mechanism 50 will be described.
The return drive mechanism 50 includes a return solenoid 61 that is a return drive unit, a return plunger 62, a return biasing member 63, and a spring receiving piece 64. The return solenoid 61 is fixed to a surface of the first facing surface portion 43 that faces the second facing surface portion 44.

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

  One end of the return plunger 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 plunger 62 in the first direction X is inserted from the cylindrical hole 61 a of the return solenoid 61 into the support hole 43 b of the first facing surface portion 43. Further, one end portion of the return plunger 62 in the first direction X is supported by the support hole 43b so as to be slidable along the first direction X.

  A first support base 58 is connected to a portion of the return plunger 62 that protrudes from the first facing surface portion 43 toward one side in the first direction X. Therefore, when the return plunger 62 moves in the first direction X, both the first support base 58 and the first holding lever 51 move in the first direction X.

  The other end of the return plunger 62 in the first direction X protrudes from the cylindrical hole 61 a of the return solenoid 61 toward the other side of the first direction X. A substantially flat spring receiving piece 64 is provided at the other end portion in the first direction X of the return plunger 62.

  The return biasing 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 interposed between the first facing surface portion 43 and the spring receiving piece 64. The urging force of the return urging member 63 is set to be larger than the urging force of the actuating urging member 48.

  In the standby state, the coil 61 b of the return solenoid 61 is not energized, and the return plunger 62 is urged toward the other side in the first direction X by the urging force of the return urging member 63. ing. As described above, the first support base 58 is provided at one end portion of the return plunger 62 with the first facing surface portion 43 interposed therebetween. Therefore, the return plunger 62 can be prevented from coming out of the cylindrical hole 61 a of the return solenoid 61 by the first support base 58 coming into contact with the first facing surface portion 43.

  Further, when the coil 61 b of the return solenoid 61 is energized, the return plunger 62 moves in the first direction X against the urging force of the return urging member 63 by the electromagnetic attracting force of the return solenoid 61. Move toward the side (see FIG. 7A).

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

1-3. Operation Example of Emergency Stop Device Next, an operation example of the emergency stop device 5 having the above-described configuration will be described with reference to FIGS. Here, the operation of the actuation mechanism 11 in the safety device 5 will be described.
FIG. 5 is an explanatory view showing a state in which the operation mechanism 11 is operated. Hereinafter, the state shown in FIG. 5 is referred to as a braking state.

First, the operation of the operation mechanism 11 from the standby state to the braking state will be described with reference to FIG.
When the control device 170 determines that the lowering speed of the car 120 reaches 1.3 times or more of the rated speed when the car 120 (see FIGS. 1 and 2) is moving downward, the control device 170 stops the emergency stop. An operation command signal is output to the device 5. Thereby, the energization to the 1st rotary solenoid 54 and the 2nd rotary solenoid 55 which are holding drive parts is intercepted. Thereby, the rotation of the first holding lever 51 and the second holding lever 52 in the direction away from the holding gear member 53 is released, and the first holding lever 51 and the second holding lever 52 can be rotated.

  Therefore, as shown in FIG. 5, the first holding lever 51 has the first rotation shaft in the direction in which the first locking hook piece 51 a is separated from the locking tooth portion 53 a by the biasing force of the actuation biasing member 48. Rotate around 56. Similarly, the second holding lever 52 rotates about the second rotation shaft 57 in the direction in which the second locking hook piece 52a is separated from the locking tooth portion 53a by the biasing force of the actuating biasing member 48. To do. As a result, the movement of the first movable plate 45 to one side in the first direction X is released.

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

  As a result, the first connecting shaft 25 connected to the first movable plate 45 and the second connecting shaft 26 connected to the second movable plate 46 move toward one side in the first direction X, The first braking mechanism 10A and the second braking mechanism 10B (see FIG. 2) operate. As a result, the pair of brake elements 31 (see FIG. 3) of the first braking mechanism 10A and the second braking mechanism 10B sandwich the guide rail 201A, so that the vertical movement of the car 120 is mechanically stopped.

Next, a return operation for returning from the braking state to the standby state in the operating mechanism 11 will be described with reference to FIGS. 6A to 7B.
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, which are holding drive units, are energized, the first holding lever 51 and the second holding lever 52 are moved to the first rotation shaft. It rotates toward the holding gear member 53 around the 56 and the second rotation shaft 57. Thereby, the 1st holding lever 51 and the 2nd holding lever 52, and the holding gear member 53 are latched again.

  Next, as shown in FIG. 6B, the energization to the first rotary solenoid 54 is interrupted. Then, the coil 61 b of the return solenoid 61 of the return drive mechanism 50 is energized. Accordingly, the return plunger 62 moves toward 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 biasing member 63 is compressed between the spring receiving piece 64 and the first facing surface portion 43.

  Further, as the return plunger 62 moves toward one side in the first direction X, the first holding lever 51 and the first support base 58 connected to the return plunger 62 also move in the first direction X. Move towards the side. The first holding lever 51 rotates around the first rotation shaft 56 by contacting the inclined surface portion of the locking tooth portion 53a. As a result, the first holding lever 51 moves to one side in the first direction X by getting over the locking tooth portion 53 a provided on the holding gear member 53 by one.

  When the first holding lever 51 gets over the locking tooth portion 53a, the first movable plate 45 is urged toward one side in the first direction X by the urging member 48 for operation. However, the second rotary solenoid 55 is energized, and the second holding lever 52 is engaged with the holding gear member 53. The movement of the first movable plate 45, which is a 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. Thereby, the 1st holding lever 51 can get over the latching-tooth part 53a smoothly.

  As shown in FIG. 7A, when the first holding lever 51 gets over the locking tooth portion 53a and the first holding lever 51 and the holding gear member 53 are locked, the first rotary solenoid 54 is energized again, 1 The holding lever 51 and the holding gear member 53 are locked. Next, the energization to the second rotary solenoid 55 is cut off, and the energization to the coil 61b of the return solenoid 61 is also cut off.

  Thereby, the return plunger 62 is urged to the other side in the first direction X by the urging force of the return urging member 63. Therefore, the first holding lever 51 and the first support base 58 connected to the return plunger 62 are also urged toward the other side in the first direction X. Further, since the first holding lever 51 and the holding gear member 53 are locked, the first movable plate 45 is also directed to the other side in the first direction X via the holding gear member 53 and the first holding lever 51. Is energized.

  As described above, the biasing force of the return biasing member 63 is set to be larger than the biasing force of the actuating biasing member 48. Therefore, the first movable plate 45 moves the locking tooth portion 53a by one portion toward the other side in the first direction X against the urging force of the urging member 48 for operation. Further, the guide rod 47 and the second movable plate 46 connected to the first movable plate 45 also move the locking tooth portion 53 a by one toward the other side in the first direction X.

  As the first movable plate 45 moves to the other side in the first direction X, the second holding lever 52 comes into contact with the inclined surface portion of the locking tooth portion 53a. Therefore, the second holding lever 52 rotates around the second rotation shaft 57. Thereby, the 2nd holding lever 52 also gets over the latching-tooth part 53a by one. The second rotary solenoid 55 is energized again, and the second holding lever 52 and the holding gear member 53 are locked. As described above, the first holding lever 51 and the second holding lever 52 repeatedly engage and release the holding gear member 53 alternately. Then, by repeating the above-described operation, the operating mechanism 11 returns from the braking state shown in FIG. 5 to the standby state shown in FIG.

Here, the length of the first tooth X in the first direction X is s, and the operation stroke amount W in the first direction X of the return plunger 62 and the first holding lever 51 is expressed by the following equation. A value satisfying 1 is set.
[Formula 1]
s <W <2s

  Thus, according to the operation mechanism 11 of this 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 motion of the return solenoid 61. Therefore, even if the movement amount of the first movable plate 45 in the first direction X in the braking state and the standby state becomes longer, the operation stroke amount W in the first direction X of the return plunger 62 does not change. As a result, the operation stroke amount W of the return plunger 62 can be reduced, and the return drive mechanism 50 can be downsized.

  The operation stroke amount W of the first holding lever 51 is not limited to the above-described example. For example, the operation stroke amount W of the first holding lever 51 and the return plunger 62 may be, for example, two or more of the locking tooth portions 53a.

  Furthermore, according to the operation mechanism 11 of this example, the return solenoid 61, the first rotary solenoid 54, and the second rotary solenoid 55 can be energized and cut off, that is, the return operation can be performed by turning each solenoid ON / OFF. . Thereby, simplification of the electric control at the time of the returning operation in the operation mechanism 11 can be achieved.

2. Second Embodiment Next, a second embodiment of the safety device will be described with reference to FIGS.
FIG. 8 is an explanatory view showing an operating mechanism in the safety device according to the second embodiment. FIG. 9 is an explanatory view showing a state in which the operating mechanism of the safety device according to the second embodiment is operating. FIGS. 10A, 10B, and 11 are explanatory views showing a return operation in the operating mechanism of the safety device according to the second embodiment.

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

  As shown in FIG. 8, the actuation mechanism 70 includes a fixed member 41, a first movable plate 45, a second movable plate 46, two guide rods 47 and 47, and two actuation urging members 48 and 48. And have. The operating mechanism 70 includes a holding / returning mechanism 71 and a return driving mechanism 90.

  The fixing member 41 has a fixing surface portion 42, a first facing surface portion 43, and a second facing surface portion 44. An insertion hole 44b through which a return plunger 92 described later is inserted is formed in the second facing surface portion 44 according to the second embodiment.

  The holding return mechanism 71 includes a first holding lever 51, a second holding lever 52, a holding gear member 53, a first rotating shaft 56, a second rotating shaft 57, a first support base 58, 2 support base 59. The first holding lever 51 according to the second embodiment is provided with a first contact pin 51b. Similarly, the second holding lever 52 is provided with a second contact pin 52b. The holding / returning mechanism 71 has a holding / driving mechanism 80.

  The holding drive mechanism 80 includes a holding solenoid 72, an example of a holding drive unit, a holding plunger 73, a biasing member 74, a holding spring receiving piece 75, a first holding arm 81, and a second holding arm. 82. Further, the holding drive mechanism 80 includes a first arm rotating shaft 84, a second arm rotating shaft 85, and a first plate spring 86 and a second plate spring 87 showing an example of a holding biasing member. ing.

  The holding solenoid 72 is fixed to a bracket (not shown) and is disposed between the first facing surface portion 43 and the second facing surface portion 44 of the fixing member 41. A holding plunger 73 passes through the cylindrical hole of the holding solenoid 72. A holding pin 73 a is provided at one end of the holding plunger 73 in the axial direction. Further, a substantially flat holding spring receiving piece 75 is provided at the other axial end of the holding plunger 73.

  A biasing member 74 is interposed between the other end portions of the holding spring receiving piece 75 and the holding solenoid 72 in the axial direction. The biasing member 74 is made of an elastic member such as a compression coil spring or rubber, for example. In the standby state, the coil of the holding solenoid 72 is energized, and the holding plunger 73 protrudes toward 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 plunger 73 are arranged such that the axial direction thereof is substantially parallel to the first direction X. Therefore, the holding plunger 73 moves along the first direction X. However, the direction in which the holding solenoid 72 and the holding plunger 73 are arranged is not limited to this, and the axial direction of the holding solenoid 72 and the holding plunger 73 is substantially parallel to the ascending / descending direction Z. You may arrange in. In this case, the holding plunger 73 moves along the up-and-down direction Z.

  The first holding arm 81 is rotatably supported on the first facing 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 facing surface portion 43 toward one side in the first direction X. The other end of the first holding arm 81 in the longitudinal direction protrudes from the first facing surface portion 43 toward the other side in the first direction X.

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

  A first roller 81 a is provided at the other end of the first holding arm 81 in the longitudinal direction. The first roller 81 a is disposed on one side in the second direction Y in the first holding arm 81. In the standby state, the first roller 81 a is in contact with the holding pin 73 a of the holding plunger 73.

  The second holding arm 82 is rotatably supported on the first facing surface portion 43 by the second arm rotation shaft 85. Further, the second holding arm 82 is disposed at a distance from the first holding arm 81 on one side in the second direction Y. The first holding arm 81 and the second holding arm 82 oppose each other with an interval in the second direction Y.

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

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

  A second roller 82 a is provided at the other end of the second holding arm 82 in the longitudinal direction. The second roller 82 a is disposed on the other side of the second holding arm 82 in the second direction Y. In the standby state, the second roller 82 a is in contact with the holding pin 73 a of the holding plunger 73.

  Therefore, the holding pin 73 a of the holding plunger 73 is interposed between the first roller 81 a of the first holding arm 81 and the second roller 82 a of the second holding arm 82. By this holding pin 73a, the first holding arm 81 and the second holding arm 82 are restricted from turning in the direction in which the first roller 81a and the second roller 82a approach each other. That is, the first holding arm 81 is restricted from rotating in the direction in which the first plate spring 86 is separated from the holding gear member 53, and the second holding arm 82 is separated from the holding gear member 53 in the second holding arm 82. Rotation in the direction to do 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 contact pin 51b. Therefore, the first holding lever 51 is restricted from rotating in the direction away from the holding gear member 53 by the holding solenoid 72 via the first leaf spring 86 and the first holding arm 81. Similarly, the second holding lever 52 is held by the second leaf spring 87 and the second holding arm 82 via the second contact pin 52b. Therefore, the second holding lever 52 is restricted from rotating in the direction away from the holding gear member 53 by the holding solenoid 72 via the second leaf spring 87 and the second holding arm 82.

  Also in the operating mechanism 70 according to the second embodiment, the first holding lever 51 and the second holding lever 52 are locked to the holding gear member 53 in the standby state. Therefore, the friction force of the first holding lever 51, the second holding lever 52, and the holding gear member 53 is applied to the force that holds the operating biasing member 48 in a compressed state against the biasing force of the operating biasing member 48. Will be added. As a result, also in the operating mechanism 70 according to the second embodiment, an increase in the capacity of the holding solenoid 72 that is the holding drive unit can be suppressed, 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 that is a return drive unit, a return plunger 92, a return biasing member 93, and a spring receiving piece 94. The return solenoid 91 is fixed to a surface of the second facing surface portion 44 that faces the first facing surface portion 43. A cylindrical hole 91 a provided in the return solenoid 91 communicates with an insertion hole 44 b provided in the second facing surface portion 44. Moreover, the cylindrical hole 91a faces the support hole 43b (refer FIG. 10B) provided in the 1st opposing surface part 43. As shown in FIG.

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

  One end of the return plunger 92 protrudes from the first facing surface portion 43 toward one side in the first direction X. A first support base 58 is connected to a portion protruding from the first facing surface portion 43 at one end portion of the return plunger 92.

  The other end of the return plunger 92 in the first direction X protrudes from the cylindrical hole 91 a of the return solenoid 91 toward the other side of the first direction X. The other end of the return plunger 92 is inserted through an insertion hole 44 b provided in the second facing surface portion 44.

  The substantially flat spring receiving piece 94 is provided on the return plunger 92. The spring receiving piece 94 is disposed between the return solenoid 91 and the first facing surface portion 43 of the return plunger 92.

  The return urging member 93 is constituted by an elastic member such as a compression coil spring, for example. The return urging member 93 covers the outer periphery of the return solenoid 91 and is interposed between the second facing surface portion 44 and the spring receiving piece 94.

  In the standby state, the coil 91b of the return solenoid 91 is not energized, and the return plunger 92 is urged toward one side in the first direction X by the urging force of the return urging member 93. ing. In addition, when the coil 91 b of the return solenoid 91 is energized, the return plunger 92 resists the urging force of the return urging member 93 by the electromagnetic attracting force of the return solenoid 91 in the first direction X. Move towards the side. Further, the electromagnetic attracting force in the return solenoid 91, that is, the driving force for moving the return plunger 92 toward the other side in the first direction X is set to be larger than the biasing force of the actuating biasing 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.
FIG. 9 is an explanatory view showing a state in which the operating mechanism 70 is operated.

  As shown in FIG. 9, when the energization to the holding solenoid 72 is interrupted by the operation command signal from the control device 170 (see FIG. 1), the holding plunger 73 is changed by the urging force of the urging member 74. It is urged to the other side in the direction X of 1. Therefore, the holding plunger 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 82a.

  As a result, the first holding arm 81 and the second holding arm 82 are released from rotating in the direction in which the first roller 81a and the second roller 82a approach each other. As a result, the rotation of the first holding lever 51 and the second holding lever 52 in the direction away from the holding gear member 53 is released, and the first holding lever 51 and the second holding lever 52 can be rotated.

  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 actuating biasing member 48. Thereby, the movement to the one side of the 1st direction X in the 1st movable plate 45 is cancelled | released. 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 braking mechanism 10A and the second braking mechanism 10B (see FIG. 2). ) Is activated.

Next, a return operation for returning from the braking state to the standby state in the operating mechanism 70 will be described with reference to FIGS.
FIG. 10A to FIG. 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. As a result, the holding plunger 73 moves to one side in the first direction X against the urging force of the urging member 74. The holding pin 73 a of the holding plunger 73 comes into contact with the first roller 81 a of the first holding arm 81 and the second roller 82 a of the second holding arm 82. Therefore, the first holding arm 81 rotates about the first arm rotation shaft 84 in the direction in which the first roller 81a is separated from the second roller 82a. The second holding arm 82 rotates about the second arm rotation shaft 85 in the direction in which the second roller 82a is separated from the first roller 81a.

  The first holding lever 51 is biased by a first leaf spring 86 provided on the first holding arm 81 and rotates toward the holding gear member 53. The second holding lever 52 rotates toward the holding gear member 53 biased by the second leaf spring 87 provided on the second holding arm 82. Thereby, the 1st holding lever 51 and the 2nd holding lever 52, and the holding gear member 53 are latched again.

  At this time, the return solenoid 91 is also energized. As a result, the return plunger 92 moves to the other side in the first direction X against the urging force of the return urging member 93. Then, the first holding lever 51 and the first support base 58 connected to the return plunger 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 interrupted. Accordingly, the return plunger 92 is urged by the return urging member 93 and moves to one side in the first direction X. Further, the first holding lever 51 and the first support base 58 connected to the return plunger 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 comes into contact with the inclined surface portion of the locking tooth portion 53 a of the holding gear member 53. Then, the first holding lever 51 rotates in a direction away from the holding gear member 53 about the first rotation shaft 56 against the urging force of the first leaf spring 86. Then, when the first holding lever 51 gets over the locking tooth portion 53 a by one, the first holding lever 51 rotates toward the holding gear member 53 by the urging force of the first leaf spring 86. Then, the first holding lever 51 is again locked to the holding gear member 53.

  At this time, the second holding lever 52 is locked to the holding gear member 53. Therefore, the movement of the first movable plate 45, which is a 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. Thereby, the 1st holding lever 51 can get over the latching-tooth part 53a smoothly.

  As shown in FIG. 11, when the first holding lever 51 gets over the locking tooth portion 53a and the first holding lever 51 and the holding gear member 53 are locked, the return solenoid 91 is energized. As a result, the return plunger 92 is urged to the other side in the first direction X by the electromagnetic attracting force of the return solenoid 91. Therefore, the first holding lever 51 and the first support base 58 connected to the return plunger 92 are also urged toward the other side in the first direction X. Further, since the first holding lever 51 and the holding gear member 53 are locked, the first movable plate 45 is also directed to the other side in the first direction X via the holding gear member 53 and the first holding lever 51. Is energized.

  As described above, the electromagnetic attracting force of the return solenoid 91 is set to be larger than the biasing force of the actuating biasing member 48. Therefore, the movable member composed of the first movable plate 45, the second movable plate 46, and the guide rod 47 has a locking tooth toward the other side in the first direction X against the biasing force of the biasing member 48 for operation. Move part 53a by one.

  Further, as the first movable plate 45 moves to the other side in the first direction X, the second holding lever 52 comes into contact with the inclined surface portion of the locking tooth portion 53a. 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 leaf spring 87.

  When the second holding lever 52 climbs over the locking tooth portion 53 a by one, the second holding lever 52 rotates toward the holding gear member 53 by the urging force of the second leaf spring 87. Then, the second holding lever 52 is again locked to the holding gear member 53. By repeating the above-described operation, the operating mechanism 70 returns from the braking state shown in FIG. 9 to the standby state shown in FIG.

  Since other configurations are the same as those of the safety device 5 according to the first embodiment, the description thereof is omitted. Also with the emergency stop device having such an operating mechanism 70, the same effect as the emergency stop device 5 according to the first embodiment described above can be obtained.

  According to the operating mechanism 70 according to the second embodiment, the first holding lever 51 and the second holding lever 52 are held by the first plate spring 86 and the second plate spring 87 during the return operation. ing. Therefore, during the return operation, the energization to the holding solenoid 72 that is the holding drive unit is maintained in the ON state, and only the return solenoid 91 that is the return drive unit repeats the ON / OFF of the energization. . As described above, according to the operating mechanism 70 according to the second embodiment, the return operation can be performed by controlling ON / OFF to one solenoid, and the electric control during the return operation can be further simplified. Can be achieved.

  It should be noted that the present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the spirit of the invention described in the claims.

  In the above-described embodiment, the example in which the direction in which the movable member in the operation mechanisms 11 and 70 moves, that is, the operation direction is set substantially parallel to the first direction X has been described, but the present invention is not limited to this. . The operation directions of the operation mechanisms 11 and 70 may be set substantially parallel to the up-and-down direction Z and the second direction Y, or inclined with respect to the first direction X, the second direction Y, and the up-and-down direction Z. It may be a direction.

  Furthermore, in the above-described embodiment, the first holding lever 51, the second holding lever 52, and the return drive mechanisms 50 and 90 are arranged on the fixed member 41, and the holding gear member 53 is a first movable plate that is a movable member. Although the example arrange | positioned to 45 was demonstrated, it is not limited to this. For example, the first holding lever 51, the second holding lever 52, and the return drive mechanisms 50 and 90 may be arranged on the movable member, and the holding gear member 53 may be arranged on the fixed member 41.

  Further, the lifting body is not limited to the car 120, and a counterweight 140 may be applied. Then, an emergency stop device may be provided on the counterweight 140 so that the lifting / lowering movement of the counterweight 140 is stopped in an emergency.

  In this specification, words such as “parallel” and “orthogonal” are used, but these do not mean only strict “parallel” and “orthogonal”, but include “parallel” and “orthogonal”. Further, it may be in a state of “substantially parallel” or “substantially orthogonal” within a range where the function can be exhibited.

  DESCRIPTION OF SYMBOLS 1 ... Elevator, 5 ... Emergency stop device, 10A, 10 ... 1st braking mechanism, 11 ... Actuating mechanism, 12 ... Interlocking mechanism, 13, 14 ... Lifting rod, 16 ... 1st operating lever, 17 ... 2nd operating lever, DESCRIPTION OF SYMBOLS 20 ... Support bracket, 25 ... 1st connection shaft, 26 ... 2nd connection shaft, 31 ... Brake, 32 ... Guide member, 33 ... Connection member, 34 ... Energizing member, 41 ... Fixing member, 43 ... 1st opposing Surface part, 43a, 44a ... Guide hole, 43b ... Support hole, 44 ... Second opposing surface part, 44b ... Insertion hole, 45 ... First movable plate (movable member), 46 ... Second movable plate (movable member), 47 ... Guide rod (movable member), 48 ... Biasing member for operation, 49, 70 ... Holding / returning mechanism, 50, 90 ... Drive mechanism for returning, 51 ... First holding lever (holding member), 51a ... First locking hook Piece, 51b ... 1st contact pin, 52 ... 2nd holding lever (holding member), 52a ... 2nd latching hook piece, 52b ... 2nd contact pin, 53 ... Holding gear member, 53a ... Locking tooth part, 53b ... Shaft part 54 ... First rotary solenoid (holding drive part), 55 ... Second rotary solenoid (holding drive part), 56 ... First rotary shaft, 57 ... Second rotary shaft, 58 ... First support base 59 ... second support base 61,91 ... return solenoid 61a, 91a ... cylindrical hole 61b, 91b ... coil 62,92 ... return plunger 63,93 ... return bias member 72 ... hold Solenoid (holding drive part), 73 ... Plunger for holding, 73a ... Holding pin, 80 ... Holding drive mechanism, 81 ... First holding arm, 81a ... First roller, 82 ... Second holding arm, 82a Second roller, 84 ... first arm pivot shaft, 85 ... second arm pivot shaft, 86 ... first leaf spring (holding biasing member), 87 ... second leaf spring (holding biasing member), DESCRIPTION OF SYMBOLS 100 ... Hoisting machine, 110 ... Hoistway, 120 ... Riding car (elevating body), 121 ... Cross head, 130 ... Main rope, 140 ... Counterweight (elevating body) 150 ... Warping car, 160 ... Machine room, 170 ... Control device, 201A, 201B ... Guide rail

Claims (10)

A braking mechanism provided on the lifting body and holding the guide rail on which the lifting body slides to stop the movement of the lifting body;
An actuation mechanism for actuating a brake element of the braking mechanism,
The operating mechanism is:
A fixing member fixed to the elevating body;
A movable member supported movably on the fixed member;
An urging member for operation that urges the movable member in a direction in which the braking mechanism operates;
A holding return mechanism that holds the movable member against the biasing force of the biasing member for operation, and
The holding and returning mechanism is
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 the holding member is releasably locked;
A holding drive unit that restricts movement of the holding member in a direction in which engagement with the holding gear member is released, and
An emergency stop device that restricts the movement of the movable member against the biasing force of the actuating biasing member by locking the holding member and the holding gear member. The operating mechanism is:
A return drive mechanism for returning from a braking state in which the braking mechanism operates to a standby state in which the braking mechanism does not operate;
The holding member is
A first holding lever movably connected to the return drive mechanism and locked to the holding gear member;
A second holding lever that is movably supported by one of the fixed member and the movable member and is locked to the holding gear member;
The emergency stop device according to claim 1, wherein the return drive mechanism alternately locks and releases the first holding lever and the second holding lever with respect to the holding gear member. The holding gear member has a plurality of locking teeth arranged along the direction in which the movable member moves,
The first holding lever moves at least one of the locking teeth in the moving direction of the movable member when the locking with the holding gear member is released by the return drive mechanism. The emergency stop device described in 1. The return drive mechanism is
A return solenoid fixed to one of the fixed member and the movable member provided with the holding member;
A return plunger supported movably in the cylindrical hole of the return solenoid and connected to the first holding lever;
The emergency stop device according to claim 2, further comprising a return urging member that urges the return plunger. The emergency stop device according to claim 4, wherein the urging force of the return urging member is set larger than the urging force of the actuating urging member. The emergency stop device according to claim 4, wherein an electromagnetic attraction force in the return solenoid is set to be larger than a biasing force of the actuating biasing member. The holding and returning mechanism is
The emergency stop device according to claim 1, further comprising a holding biasing member that biases the holding member toward the holding gear member. The emergency stop device according to claim 1, wherein the contact surface of the holding gear member that comes into contact with the holding member is set to have an angle of 90 degrees or an obtuse angle with respect to a direction in which the movable member moves. The emergency stop device according to claim 1 or 8, wherein the contact surface of the holding member with which the holding gear member contacts is set to an angle of 90 degrees or an acute angle with respect to the moving direction of the movable member. In an elevator equipped with a lifting body that moves up and down in the hoistway,
A guide rail standing in the hoistway and slidably supporting the hoisting body;
An emergency stop device for stopping the movement of the lifting body based on the state of the lifting movement of the lifting body,
A braking mechanism provided on the lifting body and stopping the movement of the lifting body by sandwiching the guide rail;
An actuation mechanism for actuating a brake element of the braking mechanism,
The operating mechanism is:
A fixing member fixed to the elevating body;
A movable member supported movably on the fixed member;
An urging member for operation that urges the movable member in a direction in which the braking mechanism operates;
A holding return mechanism that holds the movable member against the biasing force of the biasing member for operation, and
The holding and returning mechanism is
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 the holding member is releasably locked;
A holding drive unit that restricts movement of the holding member in a direction in which engagement with the holding gear member is released, and
An elevator that restricts movement of the movable member against an urging force of the urging member for operation by locking the holding member and the holding gear member.

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