JPH06211461A - Short cutting of elevator main rope - Google Patents

Abstract

PURPOSE:To provide a short cutting method of an elevator main rope capable of easily carrying out said short cutting work without any work in an elevator shaft for temporarily suspending a passenger cage and a balance weight through a chain block, etc. CONSTITUTION:A plural number of main ropes 4a, 4b, 4c are divided into two groups, a main rope drawgear provided with a hydraulic moving device 13 is connected to a thimble rod 10 on the end part of the main rope 4a of the first group, and the main rope 4a is shortened and a passenger cage 2 and a balance weight 3 are supported by this main rope drawgear. In this state, end parts of the main ropes 4b, 4c of the second group are cut short, and thereafter, the passenger cage 2 and the balance weight 3 are supported by at least one of the main ropes of the second group cut short by using the main rope drawgear provided with the hydraulic moving device 13, and in this state, the end part of the main rope 4a of the first group is cut short.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of truncating an elevator main rope in which the end portion of the elevator main rope is trimmed by a length corresponding to elongation.

[0002]

2. Description of the Related Art In a conventional elevator, when the main rope is stretched, for example, JP-A-62-264182.
As shown in the publication, the car and the counterweight are temporarily hung on a member in the hoistway using a chain block, etc., and all the main ropes are in a slackened state. A method of trimming the end of the main rope is considered.

[0003]

However, in such a conventional elevator main rope truncation method as described above,
The car and the counterweight have to be temporarily suspended via a chain block or the like, and the work in such a hoistway is complicated, the work time is long, and the risk of the work is high.

An object of the present invention is to provide a method of truncating an elevator main rope which can be easily carried out without the need for work in a hoistway for temporarily suspending a car and a counterweight via a chain block or the like.

[0005]

In order to achieve the above-mentioned object, the present invention is wrapped around the sheave of a hoist, and
At least one end has a plurality of main ropes connected to a suspension body through a thimble rod, and in an elevator main rope truncation method of truncating the ends of the main rope, the plurality of main ropes are divided into at least two groups. , The apparent length of the main rope of the first group is shorter than the length of the main rope of the second group to support the suspension body by the main rope of the first group, in this state, The end of the main rope of the second group is truncated, then the suspension body is supported by the main rope of the second group, and in this state, the end of the main rope of the first group is truncated. .

[0006]

The method of truncating the elevator main rope according to the present invention uses the first group of the main ropes originally provided as described above and adjusts the apparent length thereof to the other second group. The length of the main rope is shorter than that of the main rope, and the main rope of the first group supports the suspended body such as the car or the counterweight, and in this state, the end of the main rope of the second group is truncated. , This time, the suspension ropes were supported by the main ropes of the second group, which had been trimmed and adjusted, and in this state, the end portions of the main ropes of the first group were trimmed. It can be easily performed without the need for work in the hoistway for temporarily suspending the car and the counterweight.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 7 is a side view of an elevator adopting the method of truncating an elevator main rope according to the present invention. A suspension body that moves up and down in a hoistway 1, for example, a car 2 and a counterweight 3 is fixed to both ends. The sockets 7 and 9 are connected to each other by a plurality of main ropes 4 which are connected to thimble rods 8 and 10 through pins (not shown),
The middle of the main rope 4 is wound around a hoist 6 of a machine room 5 provided in the upper part of the hoistway 1. Further, the thimble rods 8 and 10 are provided with springs 8a and 10a, respectively.
It is connected to the suspension body such as the frame body 2a of the car 2 or the frame body 3a of the counterweight 3 via the.

FIG. 3 is a perspective view showing a main rope pulling device used in a method of truncating an elevator main rope according to an embodiment of the present invention, in which a suspended body such as a frame 2a of a car 2 or a frame 3a of a counterweight 3 is used. The hydraulic moving device 13 is abuttingly connected to the lower end of a cylindrical support member 19 arranged with its upper end abutting on it via a washer 22. One end 22a of the washer 22
Is fitted to the inner surface side of the support member 19, and the other end 22b is fitted to the outer surface side of the fixed member 14 which is generally a cylinder of the hydraulic moving device 13. In another embodiment, a washer 22
It is also possible to fix one end to either the support member 19 or the fixing member 14 and fit the other end to the other. In the hydraulic moving device 13, a piston, which is a movable member 15, is slidably arranged in a hollow cylinder, which is a fixed member 14, and a return spring 2 is provided.
The hydraulic movement device 13 is configured to be held in position by 3
The rod-shaped connecting member 11 penetrating the central part of the is connected to the movable member 15. That is, a threaded portion is formed on the rod-shaped connecting member 11, and the nut 18a screwed into this threaded portion is used.
Is provided on the lower portion 15a side of the movable member 15. Therefore,
When the movable member 15 is driven downward, the rod-shaped connecting member 11 is also driven in the same direction via the nut 18a, but the upward movement of the movable member 15 can be performed independently of the rod-shaped connecting member 11. it can. A hose 20 connected to a hydraulic pressure generation source (not shown) is connected to a hydraulic pressure chamber 16 formed by the fixed member 14 and the movable member 15. Further, the fixed member 14 located at the lower end of the hydraulic moving device 13 is in contact with the upper end of the bottomed tensioning member 17, and the tensioning member 17 penetrates the rod-shaped connecting member 11 and the nut 18a. And a window 18a formed corresponding to the above, and a nut 18b screwed with the rod-shaped connecting member 11 is provided below the bottom.
A rod-shaped connecting member 11 that penetrates the center of the hydraulic moving device 13.
The lower half of the nut 12 is screwed onto the upper end of the nut 12, and the upper half of the nut 12 is screwed onto the lower end of the thimble rod 8 or 10 shown in FIG.

When trimming the ends of the main ropes 4a, 4b, 4c using such a main rope towing device, as shown in FIG. 7, the car 2 and the counterweight 3 are placed at substantially the same height. It is stopped and fixed to the guide rail by an emergency stop device, and an operator extends his hand from above the car 2 to perform the work described later. That is, the main ropes 4a, 4
b and 4c are divided into two groups, and at the free end of the thimble rod 10 on the side of the counterweight 3 provided on the end of one main rope 4a of the first group, as shown in FIG. The nuts 12 are screwed onto the thimble rods 10 so that the nuts 12 are screwed into the thimble rods 10 to connect the thimble rods 10 and the rod-shaped connecting members 11. Furthermore, thimble rod 1
0 through which the support member 19 is inserted to bring the upper end into contact with the frame 3a, and the rod-shaped connecting member 11 is inserted through the through hole at the center of the hydraulic moving device 13, and the nut 18a is screwed from the lower end of the rod-shaped connecting member 11. The movable member 15 and the rod-shaped connecting member 1
1 is abutted and connected. In this state, when high-pressure oil is applied to the hydraulic chamber 16 of the hydraulic moving device 13 by the hydraulic pressure generation source 21, the movable member 15 shown in FIG. 3 is driven downward and is coupled in the same direction via the nut 18a. Bar-shaped connecting member 11
1 is driven downward, and the state shown in FIGS. 1 and 4 is reached. The load of the counterweight 3 is applied to the main ropes 4a of the first group. At this time, the fixing member 14 of the hydraulic moving device 13
And a washer 22 is provided between the support members 19,
Since the two are always connected well, there is no galling between the rod-shaped connecting member 11 and the movable member 15 due to the displacement between the two, and the work can be easily performed.

Next, while the nut 18b is being rotated, the erection work 1
7 is moved upward to the state shown in FIG. After that, the high-pressure oil to the hydraulic chamber 16 of the hydraulic moving device 13 is collected by the hydraulic pressure generation source 21. Then, the holding force of the hydraulic moving device 13 is lost, but the nut 18 screwed to the rod-shaped connecting member 11 is used.
b is a supporting member 19 and a fixing member 1 of the hydraulic moving device 13.
4, the rod-shaped connecting member 11 is held in the same state because it is connected to the frame 3a via the tensioning member 17. Then, the operator puts his / her hand through the window portion 17a of the tension worker 17 shown in FIG. The state is returned to the state shown in FIG. In this state of FIG. 6, when the high pressure oil is applied to the hydraulic chamber 16 of the hydraulic moving device 13 again by the hydraulic pressure generation source 21, the movable member 15 shown in FIG. 6 is driven further downward and via the nut 18a. The rod-shaped connecting member 11 connected in the same direction is further driven to loosen the main ropes 4b and 4c of the second group to support the load of the counterweight 3 by the main rope 4a of the first group as shown in FIG. . The above-described repeated operation of the hydraulic moving device 13 is performed because one stroke of the movable member 15 cannot obtain a sufficient movement distance of the rod-shaped connecting member 11, but one stroke of the movable member 15 is sufficient. It is not necessary to repeat as long as the moving distance of the rod-shaped connecting member 11 can be obtained.

When the main ropes 4b, 4c of the second group become loose, the operation of the hydraulic pressure source 21 is stopped, the other main ropes 4b, 4c are removed from the thimble rod 10, and the other ends are extended. Cut it down to the corresponding length. At this time, the car 2 and the counterweight 3 may be lifted by one main rope 4. After that, car 2
The thimble rods 8 and 10 and the sockets 7 and 9 attached to the frame body 2a of the counterweight 3 and the frame body 3a of the counterweight 3 are connected by pins to return the pressure oil in the hydraulic movement device 13 to the hydraulic pressure generation source 21. The operation opposite to the above is performed to retract the movable member 15 and apply tension to the main ropes 4b and 4c of the second group. Next, nuts 18a and 18b screwed to the thimble rod 10 provided at the end of the main rope 4a of the first group are removed, the hydraulic moving device 13 is removed, and the nut 12 is loosened to remove the rod-shaped connecting member 11 from the thimble rod 10. Detachment, which completes the work of trimming the main ropes 4b, 4c of the second group.

On the other hand, the main ropes 4a of the first group are cut in a rod-like manner through nuts 12 to the free end of the thimble rod 10 provided at the end of one new main rope that has been replaced by the same procedure as described above. The member 11 is connected, the hydraulic transfer device 13 is connected to the rod-shaped connecting member 11, and a load is applied to this one newly installed main rope to loosen the one main rope 4a of the first group as in the previous case. Therefore, after that, the end portion of one main rope 4a of the first group is removed, the end portion is cut by a length corresponding to the elongation, and the same as the above case is restored.

In this embodiment, the rod-shaped connecting member 11 and the hydraulic moving device 13 are mounted on the counterweight 3 side, but they can be mounted on the car 2 side to cut the main rope. Also, in a hydraulic elevator that does not have a counterweight, the main rope can be truncated without suspending the car with a chain block or the like. Further, if a sufficient movement distance of the rod-shaped connecting member 11 can be obtained by one stroke of the movable member 15,
The rod-shaped connecting member 11 may have a threaded portion only at the upper end, but if it is held as shown in FIG. 5, the same state can be mechanically held even if an abnormality occurs in the hydraulic moving device 13. The rod-shaped connecting member 11 preferably has a threaded portion at the lower end. Further, although the supporting member 19 is cylindrical in this embodiment, it may have another shape. Further, in the above-described embodiment, the main rope pulling device using the hydraulic moving device 13 is used to reduce the size of the main rope so that the main rope is temporarily suspended.
Other configurations of the main rope traction device may be used.

[0015]

As described above, according to the method of truncating the elevator main rope of the present invention, a suspended body such as a car or a counterweight is formed by using the first group of the main ropes originally provided. In this state, the ends of the main ropes of the second group are trimmed, and this time, the suspension bodies are supported by the main ropes of the second group that have been trimmed and adjusted. Since the end of the main rope of the group is cut down, it can be easily performed without the work in the hoistway for temporarily suspending the car and the counterweight via the chain block or the like.

[Brief description of drawings]

FIG. 1 is a side view showing an initial state of a method of trimming an elevator main rope according to an exemplary embodiment of the present invention.

FIG. 2 is a side view showing a middle state of a method of truncating an elevator main rope according to an embodiment of the present invention.

FIG. 3 is a partial cross-sectional perspective view of a main rope pulling device used in a method of truncating an elevator main rope according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a different state of the main rope traction device shown in FIG.

5 is a perspective view showing a further different state of the main rope pulling device shown in FIG. 1. FIG.

6 is a perspective view showing a further different state of the main rope pulling device shown in FIG. 1. FIG.

FIG. 7 is a side view of an elevator to which the present invention is applied.

[Explanation of symbols]

 2 Cars 3 Balancing weights 4a, 4b, 4c Main ropes 8, 10 Thimble rods 11 Rod-shaped connecting members 12 Nuts 13 Hydraulic moving devices 14 Fixed members 15 Movable members 16 Hydraulic chambers

Claims (1)

[Claims] A truncation of an elevator main rope having a plurality of main ropes wound around a sheave of a hoisting machine and having suspension bodies connected to each other through a thimble rod at least at one end thereof. In the method, the plurality of main ropes are divided into at least two groups, and the apparent length of the main ropes of the first group is made shorter than the length of the main ropes of the second group. Supporting the suspension body by the main rope of the group, in this state, the end of the main rope of the second group is cut off, then support the suspension body by the main rope of the second group, In this state, the end of the main rope of the first group is trimmed, and the elevator main rope is trimmed.