WO2018150579A1

WO2018150579A1 - Car raising movemennt restrictin device and maintenance inspection method for elevators

Info

Publication number: WO2018150579A1
Application number: PCT/JP2017/006153
Authority: WO
Inventors: 晃一本村; 恒裕東中
Original assignee: 三菱電機株式会社
Priority date: 2017-02-20
Filing date: 2017-02-20
Publication date: 2018-08-23

Abstract

This car raising movement restriction device for elevators comprises a restriction device body. The restriction device body surrounds a counterweight shock absorber and is installed in a hoistway pit. When a counterweight is lowered in the hoistway pit, the restriction device body receives the counterweight above the counterweight shock absorber, so that the counterweight is prevented from compressing the counterweight shock absorber.

Description

Elevator car lift restriction device and maintenance inspection method

The present invention relates to an elevator car ascent restriction device that restricts the range in which the car can move upward during maintenance inspection work on a car, for example, and a maintenance inspection method for the top equipment of the elevator hoistway.

In the conventional elevator apparatus, a blocking device is installed at the bottom of the hoistway as a safety measure when a worker performs maintenance and inspection work on the car. The blocking device is located just below the counterweight and next to the counterweight buffer. The upper end of the blocking device is located above the upper end of the counterweight buffer. As a result, the downward movable range of the counterweight is limited above normal, and the upward movable range of the car is limited below normal (see, for example, Patent Document 1).

Further, in other conventional elevator devices, a blocking device is installed on the top of the counterweight buffer during maintenance and inspection work. The counterweight buffer is fully compressed by receiving the load of the counterweight via the blocking device (see, for example, Patent Document 2).

Japanese Patent No. 3152001 Japanese Patent No. 4248678

In the conventional elevator apparatus shown in Patent Document 1, the blocking device is disposed at an interval in the horizontal direction with respect to the counterweight buffer. For this reason, when the balance chain or the balance rope is suspended between the balance weight and the car, the balance chain or the balance rope may interfere with the blocking device.

Also, guide shoes that contact the counterweight guide rails are mounted on both sides in the width direction of the upper part of the counterweight and on both sides in the width direction of the lower part of the counterweight. Of these, the guide shoe mounted on the lower part of the counterweight may also interfere with the blocking device.

As described above, in the configuration shown in Patent Document 1, it may be difficult in terms of layout to install the blocking device so as not to interfere with other devices.

On the other hand, in the conventional elevator apparatus shown in Patent Document 2, a large force is required to fully compress the counterweight buffer, and it may be difficult to fully compress. In particular, in the case of a spring-type counterweight buffer, it is difficult to fully compress it.

Also, the counterweight buffer may be provided with a safety switch that operates when the counterweight buffer is compressed even a little. In this case, if you try to compress the counterweight buffer, the safety switch will be activated, the car will not be able to operate, and maintenance inspection work will be performed on the top equipment, which is the equipment installed on the top of the hoistway, from the top of the car It becomes difficult.

As described above, in the configuration shown in Patent Document 2, when the maintenance operation is performed on the car, the position where the car reaches the top of the hoistway becomes low, and the maintenance and inspection work on the top equipment may not be performed.

The present invention has been made to solve the above-described problems, and avoids the buffering of the equipment in the hoistway pit, and performs maintenance and inspection work on the top equipment without compressing the counterweight buffer. It is an object of the present invention to provide an elevator car ascent restriction device and a maintenance inspection method that can be easily performed from above the car.

The elevator car ascent restriction device according to the present invention is installed in the hoistway pit so as to surround the counterweight buffer, and when the counterweight is lowered to the hoistway pit, fishing is performed above the counterweight buffer. A limiting device main body that receives the counterweight and prevents compression of the counterweight buffer by the counterweight is provided.
In the elevator maintenance and inspection method according to the present invention, a car lift limiting device having a height dimension larger than that of the counterweight buffer is installed in the hoistway pit so as to surround the counterweight buffer, , The car is stopped before the counterweight collides with the car rise restriction device, and maintenance inspection work is performed on the top equipment installed on the top of the hoistway from above the car.

According to the elevator car ascent restriction device and the maintenance inspection method of the present invention, maintenance inspection work for the top equipment can be performed from the top of the car without avoiding buffering of the equipment at the hoistway pit and without compressing the counterweight buffer. It can be done easily.

1 is a perspective view showing an elevator according to Embodiment 1 of the present invention. It is a side view which shows the principal part of the elevator of FIG. It is a side view which shows the state which the counterweight of FIG. 2 descend | falls and the counterweight buffer was fully compressed. It is a side view which shows the state at the time of the maintenance inspection work on the elevator car of FIG. It is a side view which shows the cage | basket | car lift limitation apparatus of FIG. It is a top view which shows the cage | basket | car raising restriction | limiting apparatus of FIG. 4, and its periphery. It is a side view which shows the state which the counterweight of FIG. 4 collided with the cage | basket | car raising restriction | limiting apparatus. It is a side view which shows the modification which abbreviate | omitted the buffer member of FIG. It is a side view which shows the modification which comprised the restriction | limiting apparatus main body of FIG. 8 only by the cylindrical part. It is a top view which shows the cage | basket | car rise limitation apparatus of FIG. It is a side view which shows the cage | basket | car lift limitation apparatus by Embodiment 2 of this invention. It is a side view which shows the state which removed the upper main body of FIG. 11 from the lower main body. It is a side view which shows the cage | basket | car lift limitation apparatus by Embodiment 3 of this invention. It is a top view which shows the cage | basket | car rise limitation apparatus of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a perspective view showing a machine room-less type elevator according to Embodiment 1 of the present invention. In FIG. 1, a car 2 and a counterweight 3 are provided in a hoistway 1. FIG. 1 is a perspective view of the hoistway 1 and the car 2. The counterweight 3 is disposed behind the car 2 so as to face the back surface of the car 2 when viewed from the landing side when located at the same height as the car 2.

A first base 4 and a second base 5 are installed in a hoistway pit 1 a that is the bottom of the hoistway 1. The first base 4 is disposed directly below the car 2. The second base 5 is disposed directly below the counterweight 3.

On the first base 4, first and second

car guide rails

6a and 6b are installed. The first and second

car guide rails

6 a and 6 b are disposed on both sides of the car 2 in the width direction. The car 2 is guided by the first and second

car guide rails

6 a and 6 b and moves up and down in the hoistway 1.

On the second base 5, first and second

counterweight guide rails

7a and 7b are installed. The first and second

counterweight guide rails

7 a and 7 b are disposed on both sides of the counterweight 3 in the width direction. The counterweight 3 moves up and down in the hoistway 1 while being guided by the first and second

counterweight guide rails

7a and 7b.

A hoisting machine 8 for raising and lowering the car 2 and the counterweight 3 is installed in the lower part of the hoistway 1. The hoisting machine 8 includes a drive sheave, a hoisting machine motor that rotates the driving sheave, and a hoisting machine brake that brakes the rotation of the driving sheave.

At the top of the hoistway 1, an L-shaped return beam 9 is installed. The return wheel tension 9 is supported by a first car guide rail 6a, a first counterweight guide rail 7a, and a second counterweight guide rail 7b.

Further, the return beam 9 has a cage return beam 10 and a counterweight return beam 11. The counterweight return beam 11 is connected to one end of the cage return beam 10 at a right angle.

The first and second

car return wheels

12a and 12b are supported by the car return car beam 10. A counterweight return wheel 13 is supported by the counterweight return beam 11.

At the bottom of the car 2, first and second

car suspension wheels

14a and 14b are provided. On the upper part of the counterweight 3, a counterweight suspension wheel 15 is provided.

The car 2 and the counterweight 3 are suspended in the hoistway 1 by a plurality of main ropes 16 (only one is shown in the figure) which are suspension bodies.

The leashing beam 17 is fixed horizontally between the upper end of the second car guide rail 6b and the upper end of the second counterweight guide rail 7b. The tie-down beam 17 is provided with a cage-side tie-down portion (not shown). The counterweight return beam 11 is provided with a counterweight-side leash stopper 18.

The main rope 16 has a first end connected to the car-side rope stopper and a second end connected to the counterweight-side rope stopper 18. The main rope 16 is, in order from the first end side, a first car suspension wheel 14a, a second car suspension wheel 14b, a first car return wheel 12a, a second car return wheel 12b, It is wound around the drive sheave of the machine 8, the counterweight wheel 13 and the counterweight suspension wheel 15.

Thus, the elevator according to Embodiment 1 is a 2: 1 roping elevator.

A control panel 19 is installed in the lower part of the hoistway 1. The control panel 19 is provided with an elevator control device that controls the operation of the car 2.

FIG. 2 is a side view showing a main part of the elevator shown in FIG. Although omitted in FIG. 1, a car shock absorber 21 and a counterweight shock absorber 22 are installed in the hoistway pit 1a. The car shock absorber 21 is installed on the first base 4 directly below the car 2. The counterweight buffer 22 is installed on the second base 5 just below the counterweight 3.

Further, although not shown in FIG. 1, a handrail device 23 is provided on the car 2. The handrail device 23 can be folded, and is folded as shown by a solid line in FIG. 2 during normal operation. Further, the handrail device 23 is assembled as shown by a two-dot chain line in FIG. 2 at the time of maintenance and inspection work on the car 2.

The height dimension H1 of the handrail device 23 in the folded state is smaller than the height dimension H2 of the handrail device 23 in the assembled state. In other words, the height dimension H2 of the assembled handrail device 23 is larger than the height dimension H1 of the handrail device 23 during normal operation.

Thus, the overhead dimension OH of the hoistway 1 can be reduced by folding the handrail device 23 during normal operation. The overhead dimension OH is the height from the top floor level to the ceiling of the hoistway.

FIG. 3 is a side view showing a state where the counterweight 3 in FIG. 2 is lowered and the counterweight buffer 22 is fully compressed. As shown in FIG. 3, even when the counterweight buffer 22 is fully compressed, a gap g <b> 1 is secured between the handrail device 23 and the ceiling of the hoistway 1.

FIG. 4 is a side view showing a state during maintenance and inspection work on the elevator car 2 shown in FIG. At the time of maintenance / inspection work on the car 2, the car rise limiting device 31 is installed on the second base 5. The car ascent restriction device 31 restricts the range in which the counterweight 3 can be moved downward, thereby limiting the range in which the car 2 can be moved upward. Further, the car rise restriction device 31 includes a restriction device main body 32 and a buffer member 33 fixed to an upper portion of the restriction device main body 32.

The restriction device main body 32 is installed in the hoistway pit 1 a so as to surround the counterweight buffer 22. That is, the restriction device main body 32 includes the counterweight buffer 22. Further, the restriction device main body 32 is arranged so as to overlap with the counterweight buffer 22 when viewed from directly above.

Furthermore, the height of the restriction device main body 32 is larger than the height of the counterweight buffer 22. Furthermore, the restriction device main body 32 is made of, for example, steel and is made of a material having high rigidity. As a result, the limiter body 32 receives the counterweight 3 above the counterweight buffer 22 when the counterweight 3 is lowered to the hoistway pit 1a until it collides with the car rise limiter 31. The counterweight buffer 22 is prevented from being compressed by the counterweight 3.

The buffer member 33 is made of urethane, for example. Further, the buffer stroke of the buffer member 33 is sufficiently smaller than the buffer stroke of the counterweight buffer 22.

Although omitted in FIGS. 1 to 3, the top device 24 is installed on the rope anchoring beam 17. The top device 24 includes, for example, a scale device and a car side rope stop.

When carrying out maintenance and inspection work on the car 2, the car ascent restriction device 31 is installed in the hoistway pit 1 a so as to surround the counterweight buffer 22. Thereafter, the worker gets on the car 2 and raises the car 2 at a lower speed than during normal operation. Then, the car 2 is stopped before, preferably just before, the counterweight 3 collides with the car rise restriction device 31. Thereafter, maintenance and inspection work is performed on the top device 24 from above the car 2.

5 is a side view showing the car rise restriction device 31 of FIG. 4, and FIG. 6 is a plan view showing the car rise restriction device 31 of FIG. 4 and its surroundings. The restriction device main body 32 includes a cylindrical portion 32a that is a cylindrical portion, and a lid portion 32b that closes the opening at the upper end of the cylindrical portion 32a. The cylindrical portion 32a surrounds the entire counterweight buffer 22 when the restriction device main body 32 is installed in the hoistway pit 1a. The buffer member 33 is fixed on the lid portion 32b.

When such a car ascent restriction device 31 is used, since the restriction device main body 32 is installed in the hoistway pit 1a so as to surround the counterweight buffer 22, the restriction device main body 32 does not interfere with other devices. Thus, it can be installed in the hoistway pit 1a.

Further, by suppressing the difference between the height of the restriction device main body 32 and the height of the counterweight buffer 22, the counterweight 3 is lowered to a sufficiently low position during maintenance and inspection work on the car 2. Can be made. Thereby, the distance H3 (FIG. 4) of the up-down direction from the upper surface of the cage | basket | car 2 to the top apparatus 24 can be made small.

Furthermore, since the counterweight buffer 22 is not compressed, even when the counterweight buffer 22 is provided with a safety switch, the operation of the car 2 is not stopped.

Furthermore, as shown in FIG. 7, even if the counterweight 3 collides with the car lift restriction device 31 in the assembled state of the handrail device 23, the handrail device 23 and the ceiling of the hoistway 1 are interposed between them. The gap g2 is secured. For this reason, the handrail device 23 is not damaged.

In addition, since the car lifting limit device 31 does not contribute to the buffer function of the counterweight buffer 22, even if the counterweight 3 collides with the car lift limiter 31, as shown in FIG. The shock absorber 22 is not compressed.

Therefore, according to the first embodiment, maintenance inspection work on the top device 24 is easily performed from the top of the car 2 without avoiding device buffering in the hoistway pit 1a and without compressing the counterweight buffer 22. be able to.

Further, since the counterweight buffer 22 is surrounded by the cylindrical portion 32a, the counterweight 3 can be more reliably received with a simple configuration in the event that the counterweight 3 collides with the car lift limiter 31. be able to.

Furthermore, since the buffer member 33 is fixed to the upper end portion of the restriction device main body 32, even if the counterweight 3 collides with the car rise restriction device 31, the impact of the collision can be reduced.

As shown in FIG. 8, the buffer member 33 may be omitted.
Moreover, as shown in FIG.9 and FIG.10, the cover part 32b may be abbreviate | omitted and the restriction | limiting apparatus main body 32 may be comprised only by the cylindrical part 32a. Thereby, a structure can be simplified and cost reduction and weight reduction can be achieved.
Furthermore, you may fix the buffer member 33 to the upper end part of the cylindrical part 32a of FIG.
Furthermore, the cylindrical portion is not limited to the cylindrical portion 32a, and may be a cylinder having a rectangular cross section, for example.

Embodiment 2. FIG.
Next, FIG. 11 is a side view showing a car rise limiting device 31 according to Embodiment 2 of the present invention. In the second embodiment, the restriction device main body 32 can be divided into a plurality of parts in the vertical direction. Specifically, the restriction device main body 32 according to the second embodiment includes a lower main body 34 and an upper main body 35 coupled to the upper portion of the lower main body 34. Other configurations are the same as those in the first embodiment.

In such a car rise restriction device 31, by dividing the restriction device main body 32 into the lower main body 34 and the upper main body 35, it is possible to reduce the work burden when the car rise restriction device 31 is transported and installed.

Further, the lower body 34 can be made permanent by setting the height of the lower body 34 to a dimension that does not hinder the compression of the counterweight buffer 22. In this case, at the time of maintenance and inspection work on the car 2, as shown in FIG. 12, only the upper main body 35 needs to be installed and removed, so that the work load can be further reduced. Further, since only the upper body 35 has to be stored in another place during normal operation, it can be stored even in a narrow storage space.

In FIG. 11, the restriction device main body 32 can be divided into two, but it may be divided into three or more.
8 and 9 may be divided into a plurality of parts in the vertical direction.

Embodiment 3 FIG.
Next, FIG. 13 is a side view showing a car ascent restriction device according to Embodiment 3 of the present invention, and FIG. 14 is a plan view showing the car ascent restriction device of FIG. In the third embodiment, the restriction device main body 32 shown in FIG. 9 is divided into a plurality of parts in the circumferential direction of a circle surrounding the counterweight buffer 22 when viewed from directly above. Specifically, the restriction device main body 32 according to the third embodiment includes a first divided body 36 and a second divided body 37 that faces the first divided body 36 with the counterweight buffer 22 interposed therebetween. It is divided.

The second divided body 37 is disposed with an interval in the horizontal direction with respect to the first divided body 36. The first divided body 36 has a first arc portion 36a that partially surrounds the counterweight buffer 22 when viewed from directly above. The second divided body 37 has a second arc portion 37a that partially surrounds the counterweight buffer 22 when viewed from directly above. Other configurations are the same as those in the first embodiment.

In such a car ascent restriction device, the restriction device main body 32 is divided into the first divided body 36 and the second divided body 37, so that the work load during transportation and installation of the restriction device main body 32 is reduced. can do.

In addition, the storage space can be reduced by storing the first arc portion 36a and the second arc portion 37a in the same direction.

In addition, you may fix a buffer member to the upper end part of the 1st and

2nd division bodies

36 and 37. FIG.
In the third embodiment, the restriction device main body 32 is divided into two. However, the restriction device main body 32 may be divided into three or more divided bodies in the circumferential direction of the circle surrounding the counterweight buffer 22 when viewed from directly above. . Moreover, you may divide | segment so that a division body may contact in the installation state of the restriction | limiting apparatus main body 32. FIG.

Furthermore, the layout of the elevator to which the present invention is applied is not limited to FIG. 1. For example, a hoisting machine may be disposed at the upper part of the hoistway.
Furthermore, the suspension body is not limited to the main rope 16 and may be, for example, a belt.
Moreover, in the above example, the counterweight buffer 22 is installed on the second base 5, but the counterweight buffer 22 may be directly fixed to the floor of the hoistway pit 1a. In this case, the car ascent restriction device may also be directly fixed to the floor of the hoistway pit 1a.
Furthermore, the present invention can be applied to various types of elevators in which a counterweight buffer is installed in a hoistway pit, such as an elevator having a machine room, a 1: 1 roping elevator, and a double deck elevator.

1a hoistway pit, 2 cages, 3 counterweights, 22 counterweight buffer, 24 top equipment, 31 cage lift limiter, 32 limiter body, 32a cylindrical part (cylindrical part), 33 buffer members.

Claims

It is installed in the hoistway pit so as to surround the counterweight buffer, and when the counterweight is lowered to the hoistway pit, the counterweight is received above the counterweight buffer, and the counterweight An elevator car ascent restriction device comprising: a restriction device main body for preventing compression of the counterweight buffer according to 1.
The restriction device body has a cylindrical portion,
2. The elevator car ascent restriction device according to claim 1, wherein the cylindrical portion surrounds the counterweight buffer when the restriction device main body is installed in the hoistway pit. 3.
The elevator car ascent restriction device according to claim 1 or 2, further comprising a buffer member provided at an upper end portion of the restriction device main body.
The elevator car ascent restriction device according to any one of claims 1 to 3, wherein the restriction device main body can be divided into a plurality of parts in the vertical direction.
A car lift limiting device whose height dimension is larger than the height dimension of the counterweight buffer is installed in the hoistway pit so as to surround the counterweight buffer,
Raise the car, stop the car just before the counterweight collides with the car rise restriction device,
An elevator maintenance / inspection method for performing maintenance / inspection work on the top equipment installed on the top of the hoistway from above the car.