WO2020110316A1

WO2020110316A1 - Emergency stopping device

Info

Publication number: WO2020110316A1
Application number: PCT/JP2018/044304
Authority: WO
Inventors: 洋輔久保
Original assignee: 株式会社日立製作所
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2020-06-04

Abstract

This emergency stopping device is configured so as to be provided with: a movable block that is disposed in an electric trigger so as to be capable of sliding in a first direction and a second direction that is the reverse of the first direction, and slides in the first direction thereby causing the state of a braking element to transition into an operating state; a compression spring that biases the movable block in the first direction; a bracket that is rotatably disposed and engages with the movable block at one longitudinal end side to hold the movable block in a predetermined lock position; an elastic locking body that engages with the other end side of the bracket and biases the other end side of the bracket in a rotating direction for releasing the movable block; and a solenoid that overcomes the biasing force of the elastic locking body and holds the other end side of the bracket so that the bracket does not rotate in the rotating direction for releasing the movable block.

Description

Emergency stop device

The present invention relates to an emergency stop device, and is particularly suitable for application to an elevator device.

　The elevator system is equipped with a governor and emergency stop device to stop the car that has fallen into an overspeed condition. Generally, the car and the governor are connected by a governor rope, and when the overspeed condition of the car is detected, the governor operates the emergency stop device on the car side by restraining the governor rope to stop the car emergency. It is designed to let you.

In an elevator device having such a configuration, it is necessary to dispose a long governor rope in the hoistway, which is an obstacle to space saving and cost reduction. In addition, when the building sways due to long-period ground motion or wind and the governor rope swings, there is a problem in that the reliability of the operation decreases due to interference with other structures. Therefore, in recent years, there has been proposed an elevator apparatus provided with a so-called low press governor mechanism that does not use a governor rope.

For example, in Patent Document 1, as such a low press governor mechanism, an elevator emergency stop having a return spring that has a drive spring and a wedge-shaped friction member that is brought into contact with and separated from a rail by an electromagnet device and restores the electromagnet device while storing energy in the drive spring. A device is disclosed.

JP, 2009-227353, A

By the way, in the elevator emergency stop device disclosed in Patent Document 1 described above, during normal operation, the solenoid, which is an electromagnet device, is operated to bring the compression spring into a compressed state and hold the mover.

However, when actually constructing the elevator emergency stop device having such a configuration, the spring force of the drive spring is set to a relatively large value so that the friction member, that is, the brake element, can generate a predetermined friction coefficient during operation. Therefore, the solenoid also needs to hold the mover with a large force. Therefore, when constructing such an elevator emergency stop device, it is necessary to prepare a large-capacity solenoid as a solenoid for holding the mover, which makes practical application difficult.

The present invention has been made in consideration of the above points, and aims to propose an emergency stop device that can be constructed in a small size as a whole by reducing the capacity of the solenoid.

In order to solve such a problem, in the present invention, a brake element that engages with a guide rail to make an emergency stop of a car, and an operation that makes the state of the brake element from a non-operating state during normal operation to an emergency stop of the car In an emergency stop device for an elevator having an electric trigger for making a transition to a state, the elevator stop device is slidably arranged in a predetermined first direction and a second direction opposite to the predetermined first direction, and is slidable in the first direction to thereby A movable block that transitions the state of the brake element from the non-operating state to the operating state, a compression spring that biases the movable block in the first direction, and the compression spring that is rotatably arranged and compressed. A bracket that engages with the movable block in the state of being biased in the first direction at one end side in the longitudinal direction to hold the movable block in a predetermined lock position, and the other end side of the bracket. A locking elastic body that engages and urges the other end of the bracket in the rotational direction that opens the movable block, and the locking elastic body that prevents the bracket from rotating in the rotational direction that opens the movable block. A solenoid for overcoming the urging force of the elastic body and holding the other end of the bracket is provided.

According to the present emergency stop device, by the lever principle, the solenoid having a small capacity is used to overcome the biasing force of the locking elastic body and hold the other end side of the bracket in a state where the bracket holds the movable block in the lock position. can do.

According to the present invention, it is possible to realize an emergency stop device which can reduce the capacity of a solenoid and can be constructed in a small size as a whole.

It is a front view showing a schematic structure of an elevator installation to which the present invention is applied. It is a front view showing a schematic structure of the 1st and 2nd brake child. (A) And (B) is an abbreviated front view and side view for explaining the composition of an electric trigger. FIG. 6 is a schematic line-shaped top view for explaining a suction force of a solenoid. (A) And (B) is a schematic front view and a side view for explaining the operation state of an electric trigger. (A) And (B) is a schematic front view and a side view for explaining the returning operation of the electric trigger. (A) And (B) is a schematic front view and a side view for explaining the returning operation of the electric trigger. (A) And (B) is a schematic front view and a side view for explaining the structure of the electric trigger according to the second embodiment. (A) And (B) is a schematic front view and a side view for explaining the structure of the electric trigger according to the third embodiment.

An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) First Embodiment (1-1) Schematic Configuration of Elevator Apparatus According to the Present Embodiment FIG. 1 shows a schematic configuration of an elevator apparatus 1 according to the first embodiment. The elevator apparatus 1 includes a car 3 that moves up and down in a hoistway provided in a building along

guide rails

2A and 2B, a speed sensor 4 and an emergency stop device 5 mounted on the car 3, and a hoistway. And a control panel 6 arranged in the machine room at the top of the.

The

guide rails

2A and 2B are rails for guiding the ascending/descending direction of the car 3 that moves up and down in the hoistway, and the left and right directions in the hoistway as seen from the front of the car 3 (the surface with the entrance/exit). Fixed in parallel to the height direction of the hoistway (upward direction indicated by arrow z and downward direction opposite thereto) on both inner wall surfaces (rightward direction indicated by arrow x in FIG. 1 and leftward direction opposite thereto). ing.

Further, the car 3 is suspended by a main rope (not shown) arranged in the hoistway and slidably engaged with the

guide rails

2A, 2B via a plurality of guide devices (not shown). By frictionally driving the main rope, it is possible to move up and down in the hoistway along the

guide rails

2A and 2B.

The speed sensor 4 is a sensor for detecting the relative position of the car 3 with respect to the

guide rails

2A and 2B, constantly detects the position and speed of the car 3, and notifies the control panel 6 of the detection result.

The control panel 6 is a control device that controls the operation of the entire elevator apparatus 1, monitors the ascending/descending speed of the car 3 notified from the speed sensor 4, and detects an overspeed at which the ascending/descending speed exceeds a predetermined threshold value. When it becomes a state, the emergency stop device 5 is operated.

The emergency stop device 5 is a device for making an emergency stop of the car 3 that is in an overspeed state. As shown in FIG. 2, the emergency stop device 5 engages with the

guide rails

2A and 2B when the emergency stop device 5 operates, and the car 3 And the first and

second brake elements

10A and 10B for stopping the first and

second brake elements

10A and 10B, and the first and second pull-

up rods

11A and 11B, respectively, one end side of which is connected to the corresponding first or

second brake elements

10A and 10B, respectively. A link 13 for connecting the first and second connecting

portions

12A, 12B to the first and second connecting

portions

12A, 12B to which the other ends of the corresponding first or

second pulling rods

11A, 11B are connected. And an electric trigger 14.

As shown in FIG. 2, the first and

second brake elements

10A and 10B are a pair of

engaging portions

21A and 21B fixed in the housing 20 so as to be positioned with the

corresponding guide rails

2A and 2B sandwiched therebetween. And a pair of wedge-

shaped shoes

22A, 22B movably arranged between the corresponding

engaging portions

21A, 21B and the

guide rails

2A, 2B in the ascending/descending direction of the car 3 (the height direction of the hoistway). Prepared for. Each

shoe

22A, 22B is connected to a pulling rod 23 fixed to one end of the corresponding first or

second pulling rod

11A, 11B (FIG. 1).

As a result, in the first and

second brake elements

10A, 10B, the

shoes

22A, 22B are dealt with from the non-operating state in which the

shoes

22A, 22B are not in contact with the

corresponding guide rails

2A, 2B (state during normal operation of the elevator apparatus 1). By pulling up the first or

second pulling rods

11A, 11B to bring the

shoes

22A, 22B into an operating state in which the

shoes

22A, 22B are pulled up integrally with the pulling rod 23, the guide rails corresponding to the

respective shoes

22A, 22B due to the wedge effect. It is pressed against 2A and 2B, and the car 3 can be stopped by the frictional force.

The first and second connecting

portions

12A and 12B have a T-shaped outer shape when viewed from the front, and are clockwise and counterclockwise when viewed from the front of the car 3 at the center of the T-shaped horizontal bar portion. It is rotatably supported by. The other ends of the corresponding first or

second pulling rods

11A and 11B are connected to the tips of the T-shaped vertical rod portions of the first and second connecting

portions

12A and 12B, respectively.

The link 13 is a rod-shaped member that connects the first and second connecting

portions

12A and 12B, and one end of the link 13 is located below the T-shaped horizontal bar portion of the first connecting portion 12A located on the left side of FIG. The other end is connected to the upper side of the T-shaped horizontal bar portion in the second connecting portion 12B located on the right side in FIG. As a result, the link 13 is displaced (moved) to the left in FIG. 1 to pull up the first and

second pulling rods

11A and 11B via the corresponding first or second connecting

portions

12A and 12B. As a result, both the first and

second brake elements

10A and 10B are activated and the car 3 can be brought to an emergency stop.

The electric trigger 14 is arranged, for example, in the upper part of the car 3 and operates under the control of the control panel 6 to displace the link 13 in the leftward direction in FIG. , 10B is changed from the non-operating state to the operating state.

In practice, the control panel 6 causes the main rope to move when the ascending/descending speed of the car 3 notified by the speed sensor 4 exceeds the rated speed and reaches the first overspeed (for example, a speed not exceeding 1.3 times the rated speed). The power supply of a drive device (not shown) that drives a pulley (traction sheave) (not shown) on which the power is applied and the power supply of a control device (not shown) that controls this drive device are cut off.

When the descending speed of the car 3 reaches the second overspeed (for example, a speed not exceeding 1.4 times the rated speed), the control panel 6 operates the electric trigger 14 provided on the car 3 to operate the link 13. It is displaced to the left side of FIG.

As a result, the first and

second lifting rods

11A and 11B are lifted, and in response to this, the first and

second brake elements

10A and 10B are brought into an operating state and the

shoes

22A and 22B (FIG. 2) are wedged. With this, the

guide rails

2A and 2B are pressed against the corresponding left and right sides. As a result, a frictional force is generated between the

shoes

22A, 22B and the

corresponding guide rails

2A, 2B, and the car 3 is decelerated and stopped by the braking action of this frictional force.

(1-2) Configuration of Electric Trigger Here, FIG. 3 shows a schematic configuration of the electric trigger 14 in the present embodiment. 3A is a schematic top view of the electric trigger 14, and FIG. 3B is a schematic side view of the electric trigger 14. As shown in FIG. 3, the electric trigger 14 includes a movable block 30, a compression spring 31,

solenoids

32A and 32B, an L-shaped bracket pair 33, a locking elastic body 34, a return mechanism 35, and a detection switch 36. It

The movable block 30 is, for example, a cube-shaped iron ingot arranged so as to be slidable in the left-right direction within a predetermined range regulated by the stopper 37 and guided by a slide guide (not shown). The movable block 30 is fixed to the link 13, and when the movable block 30 slides leftward as indicated by an arrow a in FIG. The

second brake elements

10A and 10B (FIG. 1) can be transitioned from the non-operating state to the operating state.

The compression spring 31 urges the movable block 30 to the left along the slide guide to slide the movable block 30 to the left to activate the first and

second brake elements

10A and 10B. It is an elastic body for making a transition. The compression spring 31 is provided between the

guide rails

2A and 2B and the

shoes

22A and 22B (FIG. 2) of the first and

second brake elements

10A and 10B when the first and

second brake elements

10A and 10B are operated. It has a constant spring force (for example, 500 N) so that a predetermined amount of frictional force can be generated.

The L-shaped bracket pair 33 is composed of a pair of L-shaped

brackets

33A and 33B. These L-shaped

brackets

33A and 33B have a movable block 30 located at a predetermined position (hereinafter, referred to as a lock position) shown in FIGS. 3A and 3B with a gap therebetween in the front-back direction (indicated by arrow y). It is arranged so as to be sandwiched from both sides in the front direction and the opposite rear direction), and is pivotally supported in the front-rear direction about the shafts 33AX and 33BX, respectively. When the movable block 30 is located at the lock position, the compression spring 31 is in a compressed state and biases the movable block 30 to the left.

The L-shaped

brackets

33A and 33B are bent at right angles at one end side close to the shafts 33AX and 33BX toward the other L-shaped

brackets

33B and 33A, respectively. In the following, one end sides of the bent L-shaped

brackets

33A and 33B are referred to as bent portions 33AY and 33BY of the L-shaped

brackets

33A and 33B, respectively. The L-shaped

brackets

33A and 33B engage (abut) the movable blocks 30 located at the lock positions on the inner sides of the respective bent portions 33AY and 33BY, thereby attaching the movable blocks 30 to the compression springs 31. It is designed so that it can be held so as not to move to the left by the power.

In the following description, the state where one end side of each L-shaped

bracket

33A, 33B is close to each other and the movable block 30 positioned at the lock position is held at one end side of these L-shaped

brackets

33A, 33B will be described below. "One end side of the L-shaped bracket pair 33 is in a closed state" or "the other end side of the L-shaped bracket pair 33 is in an open state", and one end side of these L-shaped

brackets

33A and 33B cannot hold the movable block 30. The separated state is expressed as "the one end side of the L-shaped bracket pair 33 is in the open state" or "the other end side of the L-shaped bracket pair 33 is in the closed state".

The locking elastic body 34 is composed of, for example, a spiral spring, one end side is connected to the other end of one L-shaped bracket 33A of the L-shaped bracket pair 33, and the other end side is the other L-shaped of the L-shaped bracket pair 33. It is connected to the other end of the bracket 33B. The locking elastic body 34 is provided in each of the L-shaped brackets in the rotation direction in which the other end of the L-shaped bracket pair 33 is closed (the rotation direction in which the one end of the L-shaped bracket is opened and the movable block 30 is released). The other ends of 33A and 33B are biased respectively, and the frictional force between the movable block 30 biased by the compression spring 31 and the bent portions 33AY and 33BY of the L-shaped

brackets

33A and 33B is overcome. The other end of each of the L-shaped

brackets

33A and 33B is biased by a biasing force that can rotate the one end of the pair of L-shaped brackets 33 in the opening direction.

The

solenoids

32A and 32B are provided corresponding to the L-shaped

brackets

33A and 33B of the L-shaped bracket pair 33, respectively, and are fixedly arranged at predetermined positions on the car 3. Each of the

solenoids

32A and 32B has rod-shaped movable elements 32AX and 32BX whose front ends are connected to the other ends of the corresponding L-shaped

brackets

33A and 33B, and the movable elements 32AX and 32BX are generated by electromagnetic force generated when electricity is applied. It is composed of electromagnetic coil portions 32AY and 32BY that are displaced in the central axis direction. The

solenoids

32A and 32B of the present embodiment operate so as to displace the movers 32AX and 32BX in the direction of drawing them into the electromagnetic coil portions 32AY and 32BY when energized, and the corresponding L-shaped

brackets

33A and 33B move the movable block 30. The other ends of the corresponding L-shaped

brackets

33A and 33B are overcome by overcoming the urging force of the locking elastic body 34 so as not to rotate in the opening rotation direction (the rotation direction in which the other end side of the L-shaped bracket pair 33 is closed). Hold.

The return mechanism 35 includes a return motor 40, a screw shaft 41 arranged along the sliding direction of the movable block 30, and a nut 42 screwed to the screw shaft 41. The return mechanism 35 drives the return motor 40 to screw the nut 42 onto the screw shaft 41 to move the nut 42 to the movable block 30 that has been moved to a position regulated by the stopper 37 by the urging force of the compression spring 31. After abutting, the movable block 30 can be pushed back to the locked position against the spring force of the compression spring 31.

The detection switch 36 is a sensor for detecting whether or not one end side of the L-shaped bracket pair 33 is in the closed state. The detection switch 36 sends the sensor signal raised to the logic “1” level to the control panel 6 (FIG. 1) when it detects that one end side of the L-shaped bracket pair 33 is in the closed state, and otherwise. Sends a sensor signal of logic "0" level to the control panel 6.

(1-3) State of Electric Trigger and Various Operations Next, the state of the electric trigger 5 during normal operation of the elevator will be described. During normal operation of the elevator, the electric trigger 5 is in the state shown in FIG. That is, the

solenoids

32A and 32B are both energized, the movers 32AX and 32BX of the

solenoids

32A and 32B overcome the urging force of the locking elastic body 34, and the other end of the L-shaped bracket pair 33 is opened. The other ends of the corresponding L-shaped

brackets

33A and 33B are respectively held so as to be maintained.

As a result, one end side of the L-shaped bracket pair 33 is closed, and one end side of each L-shaped

bracket

33A, 33B engages with the movable block 30, respectively, and holds the movable block 30 in the lock position. As a result, the compression spring 31 is maintained in the compressed state, and the first and

second brake elements

10A, 10B are maintained in the non-operating state in which they are not operating.

At this time, the detection switch 36 detects that one end side of the L-shaped bracket pair 33 is in the closed state, and sends a sensor signal of logic “1” level to the control panel 6 (FIG. 1). At this time, in the return mechanism 35, the return motor 40 is not driven in the non-energized state, and the nut 42 is in the standby state in which it is moved to the left end of the movable range as shown in FIG.

As described above, in the electric trigger 14, the other end side of the L-shaped bracket pair 33 is in the open state and the

solenoids

32A and 32B hold the corresponding L-shaped

brackets

33A and 33B so as to maintain the open state during the normal operation ( Hereinafter, this is referred to as a holding state), the movable block 30 is in the locked position, the first and

second brake elements

10A and 10B (FIG. 1) are in the non-operating state, the return mechanism 35 is in the standby state, and the output from the detection switch 36 is output. The sensor signal that becomes a logic "1" level.

Here, the holding force of the corresponding L-shaped

brackets

33A and 33B required for the

solenoids

32A and 32B during normal operation will be described.

FIG. 4 shows a force acting on one L-shaped bracket 33A of the L-shaped bracket pair 33 in the electric trigger 14 of FIG. As shown in FIG. 4, the spring force of the compression spring 31 (FIG. 3) is F1, the engaging friction coefficient between the movable block 30 and the bent portion 33AY of the L-shaped bracket 33A is C, and the biasing force of the locking elastic body 34 is C. F2, the distance from the engagement position with the movable block 30 on one end side of the L-shaped bracket 33A to the shaft 33AX is L1, the distance from the position where the mover 32AX of the solenoid 32A in the L-shaped bracket 33A is connected to the shaft 33AX Is L2 and the solenoid 32A is in a non-energized state, the frictional force between the bent portion 33AY of the L-shaped bracket 33A and the movable block 30 and the biasing force F2 of the locking elastic body 34 are balanced. The urging force F2 in the present state is represented by the following mathematical formula.

The urging force F2 of the locking elastic body 34 overcomes the frictional force F1×C between the bent portion 33AY of the L-shaped bracket 33A and the movable block 30 when the solenoid 32A is in the non-energized state, and is L-shaped. A magnitude (that is, a biasing force larger than F2 represented by the equation (1)) that can open one end side of the bracket pair 33 is required.

Therefore, for the solenoid 32A that holds the other end of the corresponding L-shaped bracket 33A so that the other end of the L-shaped bracket pair 33 maintains the open state, the locking elastic body 34 represented by the formula (1) is also used. It is required to have a holding force (a force opposite to F2) for holding the other end side of the corresponding L-shaped bracket 33A with a stronger force than the urging force F2.

However, by setting the connecting position of the mover 32AX of the solenoid 32A to the L-shaped bracket 33A to the other end of the L-shaped bracket 33A, the holding force required for the solenoid 32A can be minimized.

Specifically, as described above, the spring force F1 of the compression spring 31 (FIG. 3) is 500 N, the engaging friction coefficient C between the movable block 30 and the bent portion 33AY of the L-shaped bracket 33A is 0.1, the distance L1 and the distance L2. When the ratio of the lengths is set to 1:4, the biasing force of the locking elastic body 34 may be larger than the value given by the following equation.

Therefore, when the spring force of the compression spring 31 is set to 500 N, the solenoid 32A needs a holding force of 500 N in the conventional structure, but according to the structure of the present embodiment, the lever ratio of the lever principle is By using it, the holding force required for the solenoid 32A can be reduced to about 12.5 N even without considering the friction between the movable block 30 and the bent portion 33AY of the L-shaped bracket 33A. The same applies to the other solenoid 32B.

As described above, in the electric trigger 14 according to the present embodiment, the solenoid 32A, which holds the other end of each L-shaped

bracket

33A, 33B of the L-shaped bracket pair 33, is reduced by reducing the biasing force of the locking elastic body 34. The holding force of 32B can also be made small, and the capacity of the

solenoids

32A and 32B can be reduced.

Next, the state when the electric trigger 14 operates will be described. FIG. 5 shows a state when the electric trigger 14 operates. When the speed sensor 4 detects that the descending speed of the car 3 (FIG. 1) has reached the second overspeed (for example, a speed that does not exceed 1.4 times the rated speed), the control panel 6 causes the

solenoids

32A, 32B. The electric power is cut off to operate the electric trigger 14.

Specifically, when the energization of the

solenoids

32A and 32B is cut off, the locking elastic body 34 overcomes the engaging friction between the movable block 30 and the L-shaped bracket pair 33 and causes the other end side of the L-shaped bracket pair 33 to move. A transition is made to the closed state (one end side of the L-shaped bracket is opened), whereby the movable block 30 pops out in the left direction in FIG. 5 by the spring force of the compression spring 31, and the link 13 is displaced in the left direction.

Further, the first and second pulling

rods

11A and 11B (FIG. 1) are pulled up in accordance with the displacement of the link 13, and accordingly, one end portion of the first pulling rod 11A or the second pulling rod 11B is correspondingly pulled up. The pulling rods 23 (FIG. 2) of the first and

second brake elements

10A and 10B (FIG. 1) connected to each other are pulled up by a force corresponding to the spring force of the compression spring 31.

As a result, the

shoes

22A, 22B (FIG. 2) of the first and

second brake elements

10A, 10B are pressed against the

guide rails

2A, 2B with a force corresponding to the spring force of the compression spring 31, and these shoes 22A, A frictional force is generated between the guide rails 22B and the

guide rails

2A and 2B, and the car 3 is decelerated and stopped by the braking action of the frictional force. Further, since the one end side of the L-shaped bracket pair 33 is opened, the signal level of the sensor signal output from the detection switch 36 becomes the logic “0” level (that is, the sensor signal is turned off).

As described above, when the electric trigger 14 is operated, the

solenoids

32A and 32B are in a non-energized state, one end side of the L-shaped bracket pair 33 is in an open state, the movable block 30 is in a free state in which the movable block 30 protrudes leftward in FIG. The

second brake elements

10A and 10B are in the operating state, the return mechanism 35 is in the standby state, and the sensor signal output from the detection switch 36 is at the logic "0" level. At the time of inspection of the emergency stop device 5, the

solenoids

32A and 32B are intentionally de-energized to check whether the electric trigger 5 operates.

Here, a method of returning the electric trigger 14 after operation to the state before operation will be described with reference to FIGS. 6 and 7. When the electric trigger 14 after operation is returned to the original state before operation, as shown in FIG. 6, the return mechanism 35 is operated.

That is, the return motor 40 is driven, and the nut 42 is screwed on the screw shaft 41 in the right direction in FIG. As a result, the nut 42 contacts the movable block 30 in the free state, and overcomes the spring force of the compression spring 31 to push the movable block 30 back to the right. The movable block 30 pushed back enters between the one end sides of the two L-shaped

brackets

33A and 33B of the L-shaped bracket pair 33 whose one end side is in the open state as shown in FIG.

When the nut 42 further pushes the movable block 30 back to the right from this state, the right end of the movable block 30 comes into contact with the other ends of the L-shaped

brackets

33A and 33B of the L-shaped bracket pair 33, respectively. These L-shaped

brackets

33A and 33B are respectively rotated in a rotation direction in which one end side of the L-shaped bracket pair 33 is in a closed state (the other end side of the L-shaped bracket pair is in an open state).

In this way, in the process of the returning operation, the movable block 30 uses the power of the returning motor 40 to rotate the L-shaped

brackets

33A and 33B of the L-shaped bracket pair 33 so that one end side of the L-shaped bracket pair 33 is closed. When the movable strokes of the movers 32AX and 32BX of the

solenoids

32A and 32B are long, it is possible to return to the suctionable position by rotating the

solenoids

32A and 32B.

That is, generally, the

solenoids

32A and 32B are structurally limited in their movable strokes capable of attracting the movers 32AX and 32BX. On the other hand, in the present embodiment, the solenoid force of the

solenoids

32A and 32B is reduced by utilizing the lever ratio of the L-shaped

brackets

33A and 33B to reduce the spring force of the elastic body 34 for locking, and thus the solenoids The movable stroke of the movers 32AX and 32BX of 32A and 32B becomes long. However, as described above, by using the power of the return motor 40 to rotate the L-shaped

brackets

33A and 33B in the direction in which the movable block 30 closes one end side of the L-shaped bracket pair 33, the solenoid 32A, When the energization of 32B is resumed, the

solenoids

32A and 32B can bring the movers 32AX and 32BX into a state in which they can be attracted.

After that, as shown in FIG. 7, when the movable block 30 is sufficiently pushed in the right direction by using the power of the return motor 40, one end side of the L-shaped bracket pair 33 is closed and output from the detection switch 36. The signal level of the sensor signal becomes the logic "1" level (the sensor signal is turned on).

Thus, when the control panel 6 (FIG. 1) detects the ON state of this sensor signal, the energization of the

solenoids

32A and 32B is restarted. Further, thereafter, the control board 6 reversely drives the return motor 40 to screw the nut 42 leftward on the screw shaft 41, and returns the return mechanism 35 to the standby state again.

As a result, in the process of returning the return mechanism 35 to the standby state, the movable block 30 is pushed back to the left by the spring force of the compression spring 31 and constitutes one end side of the closed L-shaped bracket pair 33. The L-shaped

brackets

33A and 33B are engaged with the bent portions 33AY and 33BY, respectively. By the above, the electric trigger 14 returns to the state before the operation.

(1-4) Effects of this Embodiment As described above, in the elevator device 1 of this embodiment, in the electric trigger 14 of the emergency stop device 5, the lever elastic ratio of the lever principle is used to make the elastic member 34 for locking. Since the urging force of the solenoids is reduced, the holding force of the

solenoids

32A and 32B can be reduced accordingly, and as a result, the capacity of the

solenoids

32A and 32B can be reduced. Therefore, with the reduction in the capacity of the

solenoids

32A and 32B, the entire emergency stop device 5 can be made compact.

Further, in this emergency stop device 5, in the process of the return operation of the electric trigger 14, the movable block 30 uses the power of the return motor 40 to close the one end side of the L-shaped bracket pair 33 to each L-shaped bracket 33A. , 33B is rotated. Therefore, according to this emergency stop device 5, even if the movable stroke of the movers 32AX, 32BX of the

solenoids

32A, 32B is long, it can be returned to the suctionable position, and as a result, the

solenoids

32A, 32B have a small capacity as described above. Even when the solenoids are changed, the

solenoids

32A and 32B can be reliably returned from the release position to the holding position.

Further, in the present emergency stop device 5, the electric trigger 14 is provided with the L-shaped

brackets

33A and 33B as a pair, and the movable blocks 30 are engaged so as to be sandwiched between the bent portions 33AY and 33BY of the L-shaped

brackets

33A and 33B. Therefore, the movable block 30 can be reliably held at the lock position. Further, the other end side of each of the L-shaped

brackets

33A and 33B is rotated by the locking elastic body 34 so that the other end side of the L-shaped bracket pair 33 is in the closed state (the rotation direction in which one end side of the L-shaped bracket pair 33 is in the open state). ), the pair of L-shaped

brackets

33A and 33B can be surely synchronized and the pair of L-shaped brackets 33 can be closed and opened.

Further, since the emergency stop device 5 is provided with the detection switch 36 for detecting that one end side of the L-shaped bracket pair 33 of the electric trigger 14 is in the closed state, one end of the L-shaped bracket pair 33 is returned at the time of the returning operation. After detecting that the side is in the closed state, the return motor 40 is reversed and the return mechanism 35 is set to the standby position, so that the movable block 30 urged by the relatively large spring force of the compression spring 31 is careless. It is possible to prevent the free state and secure the safety.

(2) Second Embodiment FIG. 8 in which parts corresponding to those in FIG. 3 are designated by the same reference numerals, and instead of the electric trigger 14 according to the first embodiment described above with reference to FIG. 1, the elevator apparatus of FIG. The schematic structure of the electric trigger 50 by 2nd Embodiment applied to the emergency stop apparatus 1 of 1 is shown.

The electric trigger 50 of the present embodiment is different from the electric trigger 14 of the first embodiment in that the movable block 30 is cantilevered by one L-shaped bracket 33A, and other than that, the electric trigger 50 of the first embodiment is different. It is configured similarly to the electric trigger 14. Therefore, one end side of the locking elastic body 34 is connected to the other end side of the L-shaped bracket 33A, while the other end side of the locking elastic body 34 is fixed to the upper surface of the car 3.

In the electric trigger 50 of the present embodiment having the above-described configuration, the biasing force of the locking elastic body 34 required to bring the movable block 30 into the free state when the solenoid 32A is in the non-energized state is the first. This is the same as the locking elastic body 34 in the electric trigger 14 of the embodiment, and therefore, a small solenoid 32A can be used as in the first embodiment.

Further, in addition to this, the electric trigger 50 of the present embodiment cantilevers the movable block 30 by one L-shaped bracket 33A, so that the configuration is simplified and miniaturized as compared with the electric trigger 14 of the first embodiment. Can be converted.

(3) Third Embodiment In FIG. 9, in which parts corresponding to those in FIG. 8 are assigned the same reference numerals, the elevator apparatus of FIG. 1 is replaced with the electric trigger 50 according to the second embodiment described above with reference to FIG. The schematic structure of the electric trigger 60 by 3rd Embodiment applied to the emergency stop apparatus 1 of 1 is shown.

The electric trigger 60 of the present embodiment does not have the locking elastic body 34 (FIG. 8) that biases the other end side of the L-shaped bracket 33A in the forward direction (arrow y). Instead, the electric trigger 60 of the car 3 is replaced. It differs from the electric trigger 50 of the second embodiment in that a locking elastic body 61 that biases the movable element 32AX of the solenoid 32A fixed to the upper surface in the forward direction is provided, and other points are the same. It is configured similarly to the electric trigger 50 of the second embodiment.

In this case, the elastic body 61 for locking of the present embodiment is composed of, for example, a spiral spring, one end side is fixed to the upper surface of the car 3 and the other end side is fixed to the mover 32AX of the solenoid 32A. The elastic member 34 for locking of the second embodiment biases the mover 32AX of the solenoid 32A in the forward direction with the same force as pulling the other end side of the L-shaped bracket 33A in the forward direction.

In the electric trigger 60 of the present embodiment having the above-described configuration, during normal operation, the solenoid 32A pulls the mover 32AX into the electromagnetic coil 32AY by overcoming the biasing force applied to the mover 32AX by the locking elastic body 61. Hold the state. As a result, the L-shaped bracket 33A holds the movable block 30 by overcoming the urging force applied to the movable block 30 by the compression spring 31 at the bent portion 33AY.

When the control panel 6 (FIG. 1) detects the overspeed state of the car 3 based on the sensor signal of the speed sensor 4, the solenoid 32A is de-energized, whereby the solenoid 32A is de-energized. The mover 32AX of the solenoid 32A is displaced in the forward direction by the urging force applied from the locking elastic body 61, and accordingly, the mover 32AX pushes the other end side of the L-shaped bracket 33A in the forward direction.

As a result, one end side of the L-shaped bracket 33A is opened, the movable block 30 is unlocked, and the movable block 30 slides to the right by the biasing force of the compression spring 31. Further, at this time, as the movable block 30 slides, the link 13 also moves rightward together with the movable block 30, and the first and

second brake elements

10A, 10B (Fig.) are in an operating state and the car cage Emergency stop 3

Since the method of returning the electric trigger 60 after operation to the state before operation is the same as that of the first embodiment, description thereof is omitted here.

As described above, according to the electric trigger 60 of the present embodiment, as the solenoid 32A, a solenoid having the same attraction force as the solenoid 32A used for the electric triggers 14 and 50 of the first and second embodiments is applied. can do.

(4) Other Embodiments In the above-described first to third embodiments, the case where the bracket for holding the movable block 30 in the lock position is formed in an L shape has been described. The invention is not limited to this, and various other shapes can be widely applied as the shape of the bracket.

In addition, in the above-described first to third embodiments, the first and

second brake elements

10A and 10B that engage with the

guide rails

2A and 2B and make the emergency stop of the car 3 are configured as shown in FIG. However, the present invention is not limited to this, and various other configurations can be widely applied.

Further, in the above-described first to third embodiments, the case where the locking

elastic bodies

34, 61 are configured by the spiral springs has been described, but the present invention is not limited to this, and other than the spiral springs. Various other elastic bodies such as the rubber member and the sponge-like member can be widely applied.

The present invention can be applied to an elevator device.

1... Elevator device, 2A, 2B... Guide rail, 3... Car, 4... Speed sensor, 5... Emergency stop device, 6... Control panel, 10A, 10B... Brakes, 11A, 11B ......Pulling rod, 12A, 12B ......Coupling part, 13 ......Link, 14,50,60 ......Electric trigger, 30 ......Movable block, 31 ......Compression spring, 32A, 32B ......Solenoid, 33 ...... L-shaped bracket, 33A, 33B... L-shaped bracket, 34, 61... Locking elastic body, 35... Return mechanism, 36... Detection switch, 37... Stopper, 40... Return motor, 41... Screw Shaft, 42... Nut.

Claims

An elevator having a brake element that engages with a guide rail to make an emergency stop of the car, and an electric trigger that changes the state of the brake element from a non-operating state during normal operation to an operating state that makes the car an emergency stop In the emergency stop device of
The electric trigger is
Movable, which is slidably arranged in a predetermined first direction and a second direction opposite thereto, and which slides in the first direction to shift the state of the brake element from the non-operating state to the operating state. Block and
A compression spring for urging the movable block in the first direction;
The movable block is rotatably arranged and is engaged at one end side in the longitudinal direction with the movable block that is urged in the first direction by the compressed compression spring to lock the movable block at a predetermined lock position. Bracket to hold on,
A locking elastic body that engages with the other end side of the bracket and urges the other end side of the bracket in the rotational direction to open the movable block;
An emergency stop device, comprising: a solenoid that overcomes the biasing force of the locking elastic body and holds the other end of the bracket so that the bracket does not rotate in the rotation direction that opens the movable block.
The rotation center of the bracket is
The distance from the position held by the solenoid on the other end side to the rotation center is set to be longer than the distance from the engagement position with the movable block on the one end side to the rotation center. The emergency stop device according to claim 1.
The movable block that has been opened and slid in the first direction is returned to the lock position, and is engaged with the movable block that has returned to the lock position at one end side in the longitudinal direction to move the movable block. The emergency stop device according to claim 1, further comprising a return mechanism that rotates the bracket so as to hold the bracket in the locked position.
The brackets are provided in pairs,
The emergency stop device according to claim 1, wherein the elastic body for locking urges the other end side of each of the brackets so as to rotate each of the brackets in a rotation direction that opens the movable block.
The emergency stop device according to claim 1, further comprising a detection switch that detects a state in which the bracket holds the movable block in the lock position.
The emergency stop device according to claim 1, wherein the bracket cantilevers the movable block located in the lock position.