CN110997542B

CN110997542B - Compensation device for elevator

Info

Publication number: CN110997542B
Application number: CN201780093838.1A
Authority: CN
Inventors: 加藤岳广; 高桥良直
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2017-08-17
Filing date: 2017-08-17
Publication date: 2021-09-10
Anticipated expiration: 2037-08-17
Also published as: JPWO2019035204A1; JP6800342B2; CN110997542A; WO2019035204A1

Abstract

The compensating device of an elevator of the invention comprises: a compensating rope connected to the car and the counterweight and suspended in the hoistway; and a connecting part, one side of which is mounted on the car, and the other side of which is mounted with a compensating rope. The coupling portion in the compensating device of the present invention maintains the connection between the compensating rope and the car after the emergency stop device is operated, and sets the deceleration of the compensating rope to a deceleration different from the deceleration of the car. The connecting portion further includes: a first fitting attached to the car; one end of the compensating cable is arranged on the second fitting; a strip body, one end of which is connected with the car side and the other end of which is connected with a second accessory; and a third fitting that is attached to one end of the governor rope and that connects the first fitting and the second fitting. In the compensating device of the present invention, when the governor device detects overspeed operation of the car, the compensating rope is separated from the car in accordance with displacement of the governor rope.

Description

Compensation device for elevator

Technical Field

The present invention relates to a compensating device for an elevator including an emergency stop device.

Background

Generally, an elevator is provided with an emergency stop device that stops a car when the car is running at an overspeed. In addition, in the elevator, a compensating rope is connected to a lower portion of the car and a lower portion of the counterweight. The compensating ropes are mounted to the car or the counterweight by means of a compensating device.

As the car becomes larger, the emergency stop device becomes larger. On the other hand, the load of the compensating ropes is usually applied to the emergency stop device. In order to suppress an increase in size of the emergency stop device, it is preferable to reduce a load acting on the emergency stop device when the emergency stop device is operated.

For example, patent document 1 describes an invention for reducing a load acting on an emergency stop device when the emergency stop device is operated. In the elevator apparatus described in patent document 1, when the car is in an overspeed operation, the emergency stop device is operated, and at least one of the main rope, the tail cable for operation control, and the compensating rope is separated. As a result, the load acting on the emergency stop device is reduced.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2014-151973

Disclosure of Invention

Problems to be solved by the invention

However, the elevator apparatus described in patent document 1 is not described with respect to the main rope, the tail cable, and the compensating rope after separation. In particular, the following problems exist with respect to the compensating rope. After the compensating ropes are detached from the car, the compensating ropes will fall towards the bottom of the shaft. In this case, the compensating ropes may come into contact with equipment within the hoistway, thereby damaging the equipment. Furthermore, the compensating ropes may get caught in equipment in the shaft. Further, the compensating rope falls to the bottom of the hoistway, and thus collides with the bottom violently. In this case, the compensating ropes may generate noise. In particular, when the equipment in the hoistway is damaged or when the compensating rope is caught by the equipment and is entangled, it takes time to replace the equipment or recover the compensating rope, and therefore, the recovery operation cannot be easily performed.

The present invention has been made to solve the above problems. The invention aims to provide a compensating device which can reduce the load acting on an emergency stop device when the emergency stop device works and can easily perform recovery operation.

Means for solving the problems

The compensating device of an elevator of the invention comprises: a compensating rope connected to the car and the counterweight and suspended in the hoistway; and a connecting part, one side of which is mounted on the car, and the other side of which is mounted with a compensating rope. The coupling portion in the compensating device of the present invention maintains the connection between the compensating rope and the car after the emergency stop device is operated, and sets the deceleration of the compensating rope to a deceleration different from the deceleration of the car.

Effects of the invention

In this way, the compensating rope is not completely separated from the car when the emergency stop device is operated. The compensating ropes remain within a certain distance from the car. Therefore, the compensating rope does not cause damage to equipment in the hoistway. The compensating ropes do not hook into equipment within the hoistway. Therefore, recovery takes less time. Further, the compensating rope is less likely to fall to the bottom of the hoistway, and therefore, the noise is less likely to be generated.

After the emergency stop device is operated, the compensating rope freely falls, but the car is decelerated by the emergency stop device. That is, the compensating rope is integrated with the car without falling. During this time, the load of the compensating rope does not act on the emergency stop device. The load acting on the emergency stop device is reduced by an amount corresponding to the load of the compensating rope.

Thus, it is possible to provide a compensating device capable of reducing a load acting on the emergency stop device when the emergency stop device is operated and easily performing a recovery operation.

Drawings

Fig. 1 is a front view of an elevator including a compensating device according to embodiment 1 of the present invention.

Fig. 2 is a perspective view showing the periphery of the car.

Fig. 3 is a schematic front view showing the structure of a compensating device according to embodiment 1.

Fig. 4 is an exploded perspective view of the compensating device of embodiment 1.

Fig. 5 is a graph showing the temporal change in the deceleration of the car and the compensating chain and the temporal change in the load borne by the emergency stop device.

Fig. 6 is an exploded perspective view of a compensator according to a modification of embodiment 1.

Fig. 7 is an exploded perspective view of a compensating device according to embodiment 2.

Fig. 8 is an exploded perspective view of a compensator according to a modification of embodiment 2.

Detailed Description

Hereinafter, an embodiment of a compensating device for an elevator according to the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and redundant description thereof is omitted.

Embodiment 1.

A car 2 is provided in the hoistway 1. The car 2 is guided by a pair of left and right car guide rails 10 and ascends and descends in the hoistway 1. A progressive safety device 3 is provided at a lower portion of the car 2, and the progressive safety device 3 stops the car 2 with respect to the car guide rail 10 in an emergency.

One end of the main rope 5 is connected to an upper portion of the car 2. The main ropes 5 are hung on a hoisting machine 8 and a deflector sheave 9 provided in the upper part of the hoistway 1. The other end of the main rope 5 is connected to the upper part of the counterweight 4. The counterweight 4 is guided by the counterweight guide rail 11 and lifted.

A connection portion 100 is provided at a lower portion of the car 2. One of the connection portions 100 is attached to the car 2. The other side of the connection portion 100 is provided with a compensation chain 6. The compensating chain 6 is suspended in the hoistway 1. The compensating chain 6 is connected to a lower portion of the counterweight 4 via a compensating chain sheave 12 provided at a bottom portion of the hoistway 1. The compensating chain 6 constitutes a compensating rope. The compensating chain 6 may also be a compensating rope. Moreover, the compensating chain sheave 12 can be omitted. The rope winding ratio of the elevator in embodiment 1 is 1: 1. The structure of the main rope 5 side may vary depending on the rope winding ratio, but the structure of the connecting portion 100 is the same.

Fig. 2 is a perspective view showing the periphery of the car.

A speed limiter device 20 is provided at the top of the hoistway 1. The governor rope 21 is hung on the governor device 20. One end of the governor rope 21 hangs down from above toward the car 2. One end of the governor rope 21 is attached to the emergency stop device 3. A branching device 23 is attached between the governor device 20 and one end of the governor rope 21, and the branching device 23 is located on the side surface of the car 2 and provided on the governor rope 21. The branching means 23 is, for example, a clamp. The governor rope 21 is branched into an operating governor rope 24 by a branching device 23. When the governor rope 21 is pulled by the governor device 20, the operating governor rope 24 is pulled at the same time.

The other end of the governor rope 21 hangs down from the governor device 20 to the bottom of the hoistway 1 in the hoistway 1. A return sheave 22 is disposed at the bottom of the hoistway 1. The other end of the governor rope 21 is looped around the return sheave 22. The other end of the governor rope 21 faces upward from the return sheave 22. The other end of the governor rope 21 is fixed to the emergency stop device 3 from below.

The governor device 20 measures the speed of the car 2 from the moving speed of the governor rope 21. When the speed of the car 2 becomes equal to or higher than a predetermined reference speed, the governor rope 21 is gripped by the governor device 20, and the safety device 3 operates to stop the car 2.

Fig. 3 is a schematic front view showing the structure of a compensating device according to embodiment 1. The compensator has a connecting portion 100 and a compensating chain 6. The connection part 100 includes a first metal fitting 31, a second metal fitting 32, a third metal fitting 33, and a fall prevention rope 34.

The first fitting 31 is attached to the lower surface of the floor surface 2a of the car 2. The first fitting 31 is L-shaped. A part of the first fitting 31 overlaps the second fitting 32. The first fitting 31 is provided with a first hole 31 c. The second fitting 32 is provided with a second hole 32 c. The first hole 31c and the second hole 32c communicate in a state where the first fitting 31 and the second fitting 32 overlap. Also, the third fitting 33 has a projection 33 b. The projection 33b penetrates the first hole 31c and the second hole 32 c. The third fitting 33 joins the first fitting 31 and the second fitting 32.

One end of the fall-preventing cord 34 is attached to the first attachment 31. That is, one end of the fall prevention rope 34 is connected to the car 2 side. The other end of the fall-preventing cord 34 is connected to the second attachment 32. The fall-preventing rope 34 may be a fall-preventing chain. The length of the fall prevention rope 34 is, for example, about 1 m. The fall-preventing cord 34 constitutes a strip body.

A sheave 25 is attached to a lower surface of the floor 2a of the car 2. An operating governor rope 24 is hung on a pulley 25. The tip end of governor rope 24 for operation is attached to third attachment 33. That is, the third attachment 33 is attached to the tip end of the governor rope 21 via the governor rope 24 for operation.

In embodiment 1, the connection portion 100 is attached to the lower surface of the floor surface 2a of the car 2, but may be attached to the lower portion of the safety device 3.

Fig. 4 is an exploded perspective view of the compensating device. Fig. 4 shows details of the first to third fittings.

The first fitting 31 has a horizontal portion 31a and a vertical portion 31 b. The horizontal portion 31a is attached to the floor 2a of the car 2. Two first holes 31c are provided in the vertical portion 31 b. The vertical portion 31b is provided with a hole for attaching the fall-preventing cord 34, and one end of the fall-preventing cord 34 is attached thereto.

The second fitting 32 is a flat plate 32 a. A part of the flat plate 32a overlaps with the vertical portion 31b of the first fitting 31. Two second holes 32c are provided in the overlapped portion of the flat plate 32 a. Each second hole 32c communicates with each first hole 31 c. The flat plate 32a is provided with a hole for attaching the fall-preventing rope 34, and the other end of the fall-preventing rope 34 is attached. The flat plate 32a is provided with a hole for fixing the compensation chain 6, and the compensation chain 6 is fixed thereto.

The third fitting 33 has a flat plate portion 33a and two protrusions 33 b. The two projections 33b are cylindrical convex portions with respect to the flat plate portion 33 a. Each protrusion 33b is inserted into each first hole 31 c. Then, the respective protrusions 33b are inserted into the respective second holes 32 c. Thereby, the third metal fitting 33 connects the first metal fitting 31 and the second metal fitting 32. An operating governor rope 24 is attached to the flat plate portion 33a on the side opposite to the two projections 33 b.

The operation of the compensator according to embodiment 1 will be described with reference to fig. 2, 4, and 5.

As shown in fig. 2, the speed of the car 2 is detected by the governor device 20. When the speed of the car 2 becomes equal to or higher than a predetermined reference speed and the governor device 20 detects overspeed operation of the car 2, the governor device 20 stops the car 2. The governor device 20 grips the governor rope 21 to operate the emergency stop device 3. When the emergency stop device 3 is operated, the governor rope 21 is pulled. When the governor rope 21 is pulled, the operating governor rope 24 branched from the governor rope 21 is pulled.

As shown in fig. 4, when governor rope 24 for operation is pulled, third fitting 33 is pulled out from first fitting 31 and second fitting 32. The second fitting 32 leaves the first fitting 31 and falls down. That is, at the moment when the emergency stop device 3 operates, the second attachment 32 starts to freely fall. The second fitting 32 is provided with a compensating chain 6. The compensating chain 6 starts to fall freely. Therefore, the load of the compensating chain 6 does not act on the emergency stop device 3. In other words, the third attachment 33 is pulled out from the state of being inserted through the first attachment 31 and the second attachment 32 by the displacement of the governor rope 21, and the second attachment 32 is separated from the first attachment 31. As a result, the compensating chain 6 leaves the car 2.

The speed of the car 2 and the first fitting 31 is decelerated by the emergency stop device 3. On the other hand, the compensating chain 6 and the second fitting 32 continue to fall freely. Therefore, the distance from the first metal fitting 31 to the second metal fitting 32 increases with the passage of time. However, a fall prevention rope 34 is connected between the first metal fitting 31 and the second metal fitting 32. Therefore, the second metal fitting 32 does not separate from the first metal fitting 31 by a distance equal to or more than the length of the fall prevention cord 34.

The compensating chain 6 starts to fall freely, and when a certain time has elapsed, the fall-preventing rope 34 is fully extended. The compensating chain 6 then stops falling freely. The compensating chain 6 falls down together with the car 2 while decelerating. In this case, the load of the compensating chain 6 acts on the emergency stop device 3. Then, the car 2 is stopped by the safety device 3.

In the case where the fall prevention rope 34 is not attached to the first metal fitting 31 and the second metal fitting 32, the compensating chain 6 is completely separated from the car 2 and falls. In this case, the compensating chain 6 may come into contact with and damage equipment within the hoistway 1, or hang up on equipment within the hoistway 1. Further, the compensating chain 6 falls to the bottom of the hoistway 1 and collides with the bottom strongly. In this case, the compensation chain 6 may generate noise. In particular, when the equipment in the hoistway 1 is damaged or when the compensating chain 6 is hooked on the equipment and entangled, it takes time to replace the equipment or recover the compensating rope, and the recovery operation cannot be easily performed. When the lift stroke is large, the compensating chain 6 becomes long, and problems are likely to occur. The longer the compensation chain 6, the more time is required for the recovery process.

However, in the compensating device of embodiment 1, one end of the compensating chain 6 is held within the range of the length of the fall prevention rope 34 from the car 2. Therefore, the compensating chain 6 does not cause damage to the equipment in the hoistway 1. Moreover, the compensating chain 6 does not get hooked to the equipment inside the hoistway 1. Further, the compensating chain 6 does not fall to the bottom of the hoistway 1, and therefore, noise is not generated. Further, the second metal fittings 32 and one end of the compensating chain 6 are present near the car 2, and therefore, the normal state is easily restored.

Fig. 5 shows the time variation of the load carrying capacity of the emergency stop device, together with the time variation of the deceleration of the car and the compensating chain.

In fig. 5, the horizontal axis represents time T. The left vertical axis represents deceleration a. The deceleration a shows the acceleration as a negative value. Therefore, in the free-fall state, the deceleration a is a negative value of the gravitational acceleration. That is, when freely falling, a is-9.8 m/s/s. The right vertical axis represents the load L.

The solid line indicates a change in the load LS borne by the emergency stop device 3. The broken line indicates a change in the deceleration AK of the car 2. The single-dotted chain line indicates a change in the deceleration AC of the compensating chain 6. The deceleration AC of the compensating chain 6 is equal to the deceleration AK of the car 2 at time T2.

First, a temporal change in the load LS borne by the emergency stop device 3 will be described.

The emergency stop device 3 does not operate until time T1. Thus, the load of the compensating chain 6 acts on the emergency stop device 3. The load LS borne by the safety device 3 is the sum of the load of the car 2 and the load of the compensating chain 6, and is load L2.

At time T1, the emergency stop device 3 operates with respect to the car 2. At the same time, the compensating chain 6 leaves the car 2. Therefore, the load of the compensating chain 6 does not act on the emergency stop device 3. The load LS borne by the emergency stop device 3 is reduced by an amount corresponding to the load of the compensating chain 6. The load LS borne by the emergency stop device 3 is reduced from the load L2 to the load L1.

At time T2, the fall prevention cord 34 is fully extended. The compensating chain 6 stops falling freely and falls with the car 2. The load of the compensating chain 6 acts again on the emergency stop device 3. The load LS borne by the emergency stop device 3 causes an overshoot (overshot). Then, the load LS borne by the emergency stop device 3 is constant as the load L2.

Next, temporal changes in the deceleration AK of the car 2 and the deceleration AC of the compensating chain 6 will be described.

The emergency stop device 3 does not operate until time T1. Therefore, the deceleration AK of the car 2 and the deceleration AC of the compensating chain 6 are 0.

At time T1, the emergency stop device 3 operates with respect to the car 2. Therefore, the deceleration AK of the car 2 has a value greater than 0. The deceleration AK of the car 2 increases with time and has a maximum value a2, and then decreases.

On the other hand, at time T1, the compensating chain 6 leaves the car 2 while the emergency stop device 3 is operating. The compensating chain 6 starts to fall freely. The deceleration AC of the compensating chain 6 becomes a1 which is a negative value of the gravitational acceleration. That is, after the time T1 when the emergency stop device 3 operates with respect to the car 2, the deceleration AC of the compensating chain 6 is different from the deceleration AK of the car 2.

At time T2, the fall prevention cord 34 is fully extended. The compensating chain 6 stops falling freely and falls with the car 2. Therefore, the deceleration AC of the compensating chain 6 is equal to the deceleration AK of the car 2. At time T2, the deceleration AK of car 2 exhibits an overshoot (overshoot). Then, the deceleration AK of the car 2 and the deceleration AC of the compensating chain 6 decrease and become 0 at time T3. That is, at time T3, car 2 stops.

When the car 2 is brought to an emergency stop, the time when the emergency stop device 3 needs the most stopping energy is the time immediately after the emergency stop device 3 operates and the car 2 starts decelerating. The stopping energy is proportional to the load LS borne by the emergency stop device 3. According to the compensating device of embodiment 1, the load LS borne by the safety device 3 can be reduced from the time T1 when the car 2 starts decelerating to the time T2 when the fall prevention ropes 34 are fully extended and the load of the compensating chain 6 acts on the safety device 3. This can reduce the stop energy required for the emergency stop device 3.

As described above, the elevator compensating apparatus according to embodiment 1 includes: a compensating chain 6 connected to the car 2 and the counterweight 4 and suspended in the hoistway 1; and a connecting portion 100, one of which is attached to the car 2 and the other of which is attached to the compensating chain 6. After time T1 when the safety device 3 is activated, the coupling portion 100 maintains the coupling between the compensating chain 6 and the car 2, and sets the deceleration AC of the compensating chain 6 to a deceleration different from the deceleration AK of the car 2.

The deceleration AC of the compensating chain 6 is different from the deceleration AK of the car 2 during the time period from the time T1 when the emergency stop device 3 operates with respect to the car 2 to the time T2 when the fall prevention rope 34 is fully extended. Therefore, the load of the compensating chain 6 does not act on the safety device 3 that falls down together with the car 2 from the time T1 to the time T2.

After time T1 when the safety device 3 is operated, the compensating chain 6 is also connected to the car 2 via the fall prevention rope 34, the first metal fitting 31, and the second metal fitting 32. That is, one end of the compensating chain 6 is within the range of the length of the fall prevention rope 34 from the car 2. Therefore, the compensating chain 6 does not cause damage to the equipment in the hoistway 1. The compensating chain 6 does not hook into the equipment in the hoistway 1. Further, the compensating chain 6 does not fall to the bottom of the hoistway 1, and therefore, noise is not generated. Further, the second metal fittings 32 and one end of the compensating chain 6 are present near the car 2, and therefore, the normal state is easily restored.

The emergency stop device 3 is operated by a governor rope 21 provided in the governor device 20, and the governor device 20 detects the speed of the car 2. The connection portion 100 includes: a first fitting 31 attached to the car 2; a second fitting 32 to which one end of the compensating chain 6 is mounted; a fall prevention rope 34 having one end connected to the first metal fitting 31 on the car 2 side and the other end connected to the second metal fitting 32; and a third metal fitting 33 attached to one end of the governor rope 21 and connecting the first metal fitting 31 and the second metal fitting 32. When the governor device 20 detects overspeed operation of the car 2, the third attachment 33 is displaced relative to the first attachment 31 in accordance with displacement of the governor rope 21, so that the second attachment 32 is separated from the first attachment 31 and the compensating chain 6 is separated from the car 2.

When overspeed operation of the car 2 is detected, the governor device 20 grips the governor rope 21 to operate the safety device 3. At the same time, the governor rope 21 is pulled. At the same time, the governor rope 24 for operation branched from the governor rope 21 is pulled. The second fitting 32 is spaced from the first fitting 31. That is, the compensating device of embodiment 1 can mechanically separate the second metal fitting 32 from the first metal fitting 31. The compensating device of embodiment 1 can mechanically separate the compensating chain 6 from the car 2. This enables the compensator to operate even when no current is supplied. Therefore, for example, additional means such as mounting a battery are not required.

The first fitting 31 is provided with a first hole 31c, and the second fitting 32 is provided with a second hole 32 c. The first hole 31c and the second hole 32c communicate in a state where the first fitting 31 and the second fitting 32 overlap. The third fitting 33 connects the first fitting 31 and the second fitting 32 by a first hole 31c and a second hole 32c that communicate with each other. By the displacement of the governor rope 21, the third attachment 33 is pulled out from the state of passing through the first attachment 31 and the second attachment 32, so that the second attachment 32 is separated from the first attachment 31 and the compensating chain 6 is separated from the car 2.

By this, the second fitting 32 is mechanically separated from the first fitting 31. This enables the compensator to operate even when no current is supplied.

The fittings for attaching the compensating chain 6 can be easily replaced with the first to third fittings 31 to 33 from the fittings used in the past. Moreover, the sheave 25 is easily provided at the lower portion of the car 2. This makes it possible to easily attach the compensating device of embodiment 1 to an existing elevator.

When the compensator according to embodiment 1 is used, the load applied to the emergency stop device 3 can be reduced. Therefore, the emergency stop device 3 can be downsized. Also, in the case of modernization of the elevator, the weight of the car 2 can be increased without replacing the emergency stop device 3.

Fig. 6 is an exploded perspective view of a compensator according to a modification of embodiment 1. The compensator according to the modification of embodiment 1 includes a coupling portion 101 and a compensator chain 6. The connection part 101 includes a first metal fitting 41, a second metal fitting 42, a third metal fitting 43, and a fall prevention rope 34.

The first fitting 41 has an L-shape and has a horizontal portion 41a and a vertical portion 41 b. The horizontal portion 41a is attached to the floor 2a of the car 2. The vertical portion 41b is provided with a first hole 41 c. One end of the fall-preventing rope 34 is attached to the vertical portion 41 b. That is, one end of the fall prevention rope 34 is connected to the car 2 side.

The second fitting 42 is a flat plate 42 a. A part of the flat plate 42a overlaps with the vertical portion 41b of the first fitting 41. A second hole 42c is provided in the overlapped portion of the flat plate 42 a. The second hole 42c communicates with the first hole 41c in a state where the first metal fitting 41 and the second metal fitting 42 overlap. The other end of the fall-preventing rope 34 is attached to the flat plate 42 a. That is, the other end of the fall prevention rope 34 is connected to the second attachment 42. Further, the flat plate 42a is provided with a compensating chain 6.

The third fitting 43 is a cylindrical fitting. Third attachment 43 is attached to the tip end of governor rope 24 for operation. That is, the third attachment 43 is attached to one end of the governor rope 21 via the governor rope 24 for operation. The third fitting 43 penetrates the first hole 41c and the second hole 42 c. Therefore, the third metal fitting 43 connects the first metal fitting 41 and the second metal fitting 42.

When the emergency stop device 3 is operated, the governor device 20 displaces the governor rope 21. With the displacement of the governor rope 21, the third attachment 43 is pulled out from the state of being inserted through the first attachment 41 and the second attachment 42 via the governor rope 24 for operation. Thus, the second fitting 42 is away from the first fitting 41. The compensating chain 6 leaves the car 2. The fall prevention rope 34 prevents one end of the compensating chain 6 from being separated from the car 2 by a distance equal to or more than the length of the fall prevention rope 34 even after the end is separated from the car 2.

As described above, in the compensator according to the modification of embodiment 1, the first hole 41c is provided in the first metal fitting 41, and the second hole 42c is provided in the second metal fitting 42. The first hole 41c and the second hole 42c communicate with each other in a state where the first metal fitting 41 and the second metal fitting 42 overlap each other. The third fitting 43 connects the first fitting 41 and the second fitting 42 to each other through a first hole 41c and a second hole 42c communicating with each other. The third attachment 43 is pulled out from the state of being inserted through the first attachment 41 and the second attachment 42 by the displacement of the governor rope 21. The second fitting 42 is clear of the first fitting 41. The compensating chain 6 leaves the car 2. This enables the compensator to operate even when no current is supplied.

Embodiment 2.

Next, a compensation device according to embodiment 2 of the present invention will be described with reference to fig. 7. In embodiment 1, the second metal fitting is separated from the first metal fitting by pulling out the third metal fitting. In embodiment 2, the second fitting is separated from the first fitting by rotation of the third fitting.

The compensator of embodiment 2 includes a coupling 102 and a compensator chain 6. The connection part 102 includes the first metal fitting 51, the second metal fitting 52, the third metal fitting 53, and the fall prevention rope 34.

The first metal fitting 51 is attached to the lower surface of the floor surface 2a of the car 2. A third fitting 53 is attached to the first fitting 51. The third fitting 53 is rotatably supported by the first fitting 51 via a rotation pin 55. The third fitting 53 is C-shaped. Third attachment 53 has governor rope 24 for operation attached thereto. That is, the third attachment 53 is attached to one end of the governor rope 21 via the governor rope 24 for operation. The second fitting 52 is hung on the third fitting 53. That is, the third fitting 53 connects the second fitting 52 to the first fitting 51.

The second fitting 52 is C-shaped. At the second fitting 52 is mounted one end of the compensating chain 6. For example, the compensating chain 6 is mounted at the end of the right side of the second fitting 52. In this way, the compensation chain 6 and the second fitting 52 are hooked on the third fitting 53, and the third fitting 53 is thereby prevented from rotating. In order to prevent the third fitting 53 from rotating when only the compensating chain 6 and the second fitting 52 are hooked on the third fitting 53, a torsion spring may be provided to the rotation pin 55.

One end of the fall-preventing rope 34 is attached to the third attachment 53. That is, one end of the fall prevention rope 34 is connected to the car 2 side. The other end of the fall-preventing cord 34 is connected to the second attachment 52.

Next, the operation of the compensator according to embodiment 2 will be described with reference to fig. 7.

When the speed of the car 2 becomes equal to or higher than the reference speed, the governor rope 21 is pulled. Along with this, the governor rope 24 for operation branched from the governor rope 21 is also pulled. The third fitting 53 rotates counterclockwise about the rotation pin 55. The second fitting 52 exits the third fitting 53. The second fitting 52 and the compensating chain 6 start to fall freely. On the other hand, the car 2 starts decelerating by the safety device 3. During the free fall of the compensating chain 6, the load of the compensating chain 6 does not act on the emergency stop device 3.

While the compensating chain 6 is free to fall, the deceleration of the compensating chain 6 is different from the deceleration of the car 2. Therefore, after a certain time, the fall prevention cord 34 is fully extended. When the fall-preventing rope 34 is fully extended, the compensating chain 6 stops freely falling. The compensating chain 6 is integrated with the car 2 and falls while decelerating. The load of the compensating chain 6 acts again on the emergency stop device 3. Then, the car 2 stops.

In the compensating device of embodiment 2, the third fitting 53 is rotatably supported by the first fitting 51. With the displacement of the governor rope 21, the third attachment 53 rotates relative to the first attachment 51, and the second attachment 52 separates from the first attachment 51. The compensating chain 6 leaves the car 2. This enables the compensator to operate even when no current is supplied.

Fig. 8 is an exploded perspective view of a compensator according to a modification of embodiment 2. The compensator according to the modification of embodiment 2 includes a coupling portion 103 and a compensator chain 6. The connection part 103 includes a first metal fitting 61, a second metal fitting 62, a third metal fitting 63, and a fall prevention rope 34.

The first fitting 61 has a horizontal portion 61a and a vertical portion 61 b. The horizontal portion 61a is attached to the lower surface of the floor 2a of the car. The vertical portion 61b is curved. A rotation pin 65 is provided at the bend. A third fitting 63 is attached to the first fitting 61. The third fitting 63 is U-shaped. The third metal fitting 63 is rotatably supported at one end of the U-shape by the first metal fitting 61 via a rotation pin 65.

The third attachment 63 has the governor rope 24 for operation attached to one corner of the U-shaped bend. That is, the third attachment 63 is attached to the tip end of the governor rope 21 via the governor rope 24 for operation. The second fitting 62 having a square frame shape is hung on the third fitting 63. At the second fitting 62 is mounted one end of the compensating chain 6.

One end of the fall-preventing rope 34 is attached to the vertical portion 61b of the first attachment 61. That is, one end of the fall prevention rope 34 is connected to the car 2 side. The other end of the fall-preventing cord 34 is connected to the second attachment 62.

When the speed of the car 2 becomes equal to or higher than the reference speed, the governor rope 21 is pulled, and the operating governor rope 24 branched from the governor rope 21 is pulled. The third fitting 63 rotates counterclockwise about the rotation pin 65. The second fitting 62 is clear of the third fitting 63. The second fitting 62 and the compensating chain 6 start to fall freely. On the other hand, the car 2 starts decelerating by the safety device 3. Therefore, the load of the compensating chain 6 does not act on the emergency stop device 3.

Due to the difference between the deceleration of the car 2 and the deceleration of the compensating chain 6, the fall preventing rope 34 is fully extended after a certain time. When the fall-preventing rope 34 is fully extended, the compensating chain 6 stops freely falling. The compensating chain 6 is integrated with the car 2 and falls while decelerating. The load of the compensating chain 6 acts again on the emergency stop device 3. Eventually, the car 2 stops.

In the compensator according to the modification of embodiment 2, the third metal fitting 63 is rotatably supported by the first metal fitting 61. With the displacement of the governor rope 21, the third attachment 63 rotates relative to the first attachment 61, and the second attachment 62 separates from the first attachment 61. The compensating chain 6 leaves the car 2. This enables the compensator to operate even when no current is supplied.

Description of the reference symbols

1: a hoistway; 2: a car; 3: an emergency stop device; 4: a counterweight; 6: a compensating chain (compensating rope); 20: a speed limiter device; 21: a governor rope; 31. 41, 51, 61: a first fitting; 31c, 41 c: a first hole; 32. 42, 52, 62: a second fitting; 32c, 42 c: a second hole; 33. 43, 53, 63: a third fitting; 34: a fall prevention rope (strip); 100. 101, 102, 103: a connecting portion; AC: deceleration of the compensating chain (deceleration of the compensating rope); AK: the deceleration of the car.

Claims

1. A compensating device for an elevator, the elevator comprising: a car and a counterweight that ascend and descend in a hoistway; and an emergency stop device for emergency stopping the car, wherein the elevator compensating device comprises:

a compensating rope connected to the car and the counterweight and suspended in the hoistway; and

a connecting portion having one end attached to the car and the other end attached to the compensating rope,

the coupling portion maintains the connection between the compensating rope and the car after the emergency stop device is operated, and sets the deceleration of the compensating rope to a deceleration that is different from the deceleration of the car and has a negative value of gravitational acceleration.

2. A compensating device for an elevator, the elevator comprising: a car and a counterweight that ascend and descend in a hoistway; and an emergency stop device for emergency stopping the car, wherein the elevator compensating device comprises:

the coupling portion maintains the connection between the compensating rope and the car after the emergency stop device is operated, and sets the deceleration of the compensating rope to a deceleration different from the deceleration of the car,

the emergency stop device is operated by a speed governor rope provided in a speed governor device that detects the speed of the car,

the connecting portion includes:

a first fitting mounted to the car;

a second fitting to which one end of the compensating rope is mounted;

a strip body having one end connected to the car side and the other end connected to the second attachment; and

a third fitting that is mounted to one end of the governor rope and that connects the first fitting and the second fitting,

in the event that the governor device detects overspeed travel of the car, the third fitting is displaced relative to the first fitting with displacement of the governor rope so that the second fitting leaves the first fitting and the compensating rope leaves the car.

3. The compensating device of an elevator according to claim 2,

a first hole is provided in the first fitting,

a second hole is provided in the second fitting,

the first hole and the second hole communicate in a state where the first fitting overlaps with the second fitting,

the third fitting joins the first fitting and the second fitting by penetrating the first hole and the second hole that communicate,

as the governor rope is displaced, the third attachment is pulled out from the state of passing through the first attachment and the second attachment, the second attachment is separated from the first attachment, and the compensating rope is separated from the car.

4. The compensating device of an elevator according to claim 2,

the third fitting is rotatably supported by the first fitting,

with the displacement of the governor rope, the third fitting rotates relative to the first fitting so that the second fitting leaves the first fitting and the compensating rope leaves the car.