JPH06234479A - Exchange method for elevator main rope - Google Patents

Abstract

PURPOSE:To provide an exchange method for an elevator main rope wherein an initial elongation amount of the main rope can be removed for a relatively short time. CONSTITUTION:Main ropes 4a, 4b, 4c are divided into two groups, and a car 2 is supported by the main rope 4a contracted by a main rope hydraulic traction device 24 having a hydraulic mover 13 connected to a thimble rod 10a of the main rope 4a of the first group, to exchange, under this condition, the main ropes 4b, 4c of the second group, thereafter to exchange the main rope 4a of the first group in a condition of supporting the car 2 by the exchanged single main rope of the second group. Further a plurality of combinations in a condition smaller than a total number of the main ropes are provided, and tensile force is applied to an opposite car side of a newly provided main rope by each combination by the hydraulic mover 13, to respectively support the car 2, to generate initial elongation of each newly provided main rope, thereafter to connect an opposite car side of each newly provided main rope so as to remove the initial elongation amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of replacing an elevator main rope.

[0002]

2. Description of the Related Art When a main rope is replaced in a conventional elevator, for example, in a rope type elevator, as shown in Japanese Patent Laid-Open No. 264182/1987, a car and a counterweight are used as members in a hoistway. All the existing main ropes were replaced with new main ropes by temporarily suspending them using a chain block. In hydraulic elevators,
The lower part of the car is supported by the support member arranged in the pit, and in this state, the thimble rods at both ends of the existing main rope are removed, and the existing work floor that is hung on the upper part of the hoistway is hung on the plunger pulley. Remove the main rope,
This was replaced with a new main rope, and the thimble rods at both ends of the new main rope were connected to predetermined locations.

[0003]

However, after the main rope is replaced by such a conventional elevator main rope replacement method, the operation is promptly restarted. When a counterweight is applied, a relatively large initial elongation occurs at the initial stage. After that, when elongation due to long-term use is added and the total elongation reaches a predetermined length, it is necessary to cut the length corresponding to the elongation. Therefore, if the initial extension can be cut off when the main rope is replaced, then the work of cutting down the length corresponding to the extension can be omitted.

An object of the present invention is to provide a method for replacing an elevator main rope, which can remove the initial elongation of the main rope in a relatively short time.

[0005]

In order to achieve the above object, the present invention comprises a plurality of main ropes, at least one end of which is connected to an elevating body, and the existing main rope is a newly installed main rope. In the method of replacing the main ropes of the elevator, 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 changed by the hydraulic moving device. With the rope shorter than the length and supporting the lifting body,
Replace the existing main rope of the second group with a new main rope, and then replace the main rope of the first group with the lifting body supported by the main rope of the second group. , The first main rope of the new group and the new main rope of the second group make a plurality of combinations of the number of main ropes smaller than the total number of main ropes, and the hydraulic movement of the anti-elevator side of the new main rope by each combination. A pulling force is applied by a device to support the elevating bodies respectively, and after the initial extension of each new main rope, the anti-elevation body side of each new main rope is connected. Is characterized by.

[0006]

The method of exchanging the elevator main rope according to the present invention is such that the first group of the main ropes originally provided as described above is used to support the elevators such as the car and the like of the second group. Since the main ropes were replaced, and then the main ropes of the first group were replaced while the lifts were supported by the new main ropes of the replaced second group, in the rope-type elevator, the car and the counterweight were The main rope can be easily replaced without temporarily suspending it in the hoistway and without bringing a special support member for supporting the car into the pit in the hydraulic elevator. Also, after that, with the new main rope of the first group and the new main rope of the second group, make a plurality of combinations of the number of main ropes that is less than the total number of main ropes, and pull the tension on the anti-elevator side of the new main rope by each combination By applying a force to support the elevators respectively and cause the initial extension of each new main rope, and after that, the anti-elevator side of each new main rope is connected so as to absorb the initial extension,
The initial elongation can be removed in a relatively short time, that is, at the same time as the replacement.

[0007]

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

FIG. 11 is a side view of an elevator adopting the method of replacing the elevator main rope according to the present invention, in which a suspension body that moves up and down in the hoistway 1, for example, the car 2 and the counterweight 3 is fixed to both ends. Sockets 7 and 9
Through the pins (not shown) to the thimble rods 8 and 10
Are connected by a plurality of main ropes 4 connected to each other, and the middle of the main ropes 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 connected to suspension bodies such as the frame body 2a of the car 2 and the frame body 3a of the counterweight 3 via springs 30 and 31, respectively. The main rope 4 will be described below as comprising three main ropes 4a, 4b and 4c.

FIG. 3 is a perspective view showing a hydraulic moving device used in a method of replacing an elevator main rope according to an embodiment of the present invention. The cylindrical support is arranged with its upper end abutting on the frame 3a of the counterweight 3. The hydraulic moving device 13 is abutted and connected to the lower end of the member 19 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 2
2b is fitted on the outer surface side of a fixed member 14 which is generally a cylinder of the hydraulic moving device 13. In another embodiment, one end of the washer 22 may be fixed to either the support member 19 or the fixing member 14, and the other end may be fitted to the other. Hydraulic moving device 13
Is constructed by slidably disposing a piston 15a of a movable member 15 in a hollow cylinder that is a fixed member 14,
A rod-shaped connecting member 11 that penetrates the center of the hydraulic moving device 13.
Is connected to the movable member 15. That is, a threaded portion is formed on the rod-shaped connecting member 11, and a nut 18 a screwed to this threaded portion is provided on the lower 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 is independent of the rod-shaped connecting member 11. It can be carried out. 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. The lower half of the long nut 12 is screwed onto the upper end of the rod-shaped connecting member 11 penetrating the center of the hydraulic moving device 13, and the upper half of the long nut 12 is screwed onto the lower end of the thimble rod 10 shown in FIG. Are combined.

When the main ropes 4a, 4b and 4c are exchanged by using the hydraulic moving device 13 as described above, the car 2 is stopped at an appropriate height as shown in FIG. The person performs the work described below. That is, the main ropes 4a, 4b, 4c are divided into two groups, and at the free end of the thimble rod 10a provided at the end of one main rope 4a of the first group, the rod-shaped connecting member 11 is provided as shown in FIG. The upper ends of the nuts are butted and the long nut 12 is screwed into the thimble rod 10a to connect the thimble rod 10a and the rod-shaped connecting member 11. Furthermore, thimble rod 10
The support member 19 is inserted into the a and the upper end is brought into contact with the frame 3a, and the rod-shaped connecting member 11 is inserted into 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 of FIGS. 1 and 4 is reached, and the load of the car 2 is added to the main ropes 4a of the first group. At this time, a washer 22 is provided between the fixed member 14 of the hydraulic moving device 13 and the support member 19, and the two members are always connected well, so that the rod-shaped connecting member 11 is misaligned between them. There is no galling between the movable member 15 and the movable member 15, 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 2a via the tension member 17. After that, the operator puts his / her hand through the window portion 17a of the tension worker 17 shown in FIG. 5 and turns the nut 18a to push up the movable member 15 of the hydraulic moving device 13 to return only the hydraulic moving device 13 to the state of FIG. Then, the state shown in FIG. 6 is obtained. 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 driven further downward, and the main ropes 4b and 4c of the second group are loosened to load the balance weight 3 by the main rope 4a of the first group as shown in FIG. To support. 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 are in a loosened state, the operation of the hydraulic pressure generation source 21 is stopped, and the other main ropes 4b, 4c are connected to the thimble rod 10b,
When the new main rope is removed from 10c, the new main rope is connected to the end, and the opposite end is wound up, the tip side of the new main rope crosses the hoisting machine 6 of FIG.
The state is similar to that of 4c. After that, the existing main rope 4b,
4c and the new main ropes 4B and 4C are separated from each other, and the socket 7 is fixed to one end of the new main rope as in the initial state.
b, 7c through a pin (not shown) for thimble rod 8
The sockets 9b, 9c fixed to the other ends of the thimble rod 1 are connected to the b, 8c through a pin (not shown).
0b and 10c, and the thimble rods 10b and 10c are passed through the frame 3a of the counterweight 3 with the springs 31b and 31c removed, and at the ends thereof, as shown in FIG. The hydraulic moving devices 13B and 13C having the same structure as 13 are connected. Then, the hydraulic moving devices 13B and 13C of the new main ropes 4B and 4C of the second group are operated to operate the new main ropes 4B and 4C in the same manner as the case of the main rope 4a of the first group.
Is applied to reduce the axial length, and the load of the car 2 is applied to the new main ropes 4B and 4C of the second group. Then, the pressure oil in the hydraulic movement device 13 connected to the main ropes 4a of the first group is returned to the hydraulic pressure generation source 21, and the operation reverse to the above operation is performed to retract the movable member 15 to move the main member of the first group. The nuts 18a, 18b screwed to the rod-shaped connecting member 11 are removed via the thimble rod 10a provided at the end of the rope 4a, the hydraulic moving device 13 is removed, and the long nut 12 is loosened to connect the thimble rod 10a to the rod-shaped connection. The member 11 is removed, whereby the replacement work of the new main ropes 4B, 4C of the second group is completed. Thus, the car 2 is temporarily supported by the two new main ropes 4B, 4C, which are less than the total number of main ropes, and the same pressure is applied by the hydraulic moving devices 13B, 13C having the same structure. The new main ropes 4B and 4C have the same initial elongation.

The replacement of the main ropes 4a of the first group is carried out by replacing the above-mentioned state with the new main ropes 4A, and thereafter, as shown in FIG.
Similarly, the hydraulic movement device 13 is attached again and the state of FIG. 8 is obtained. In this state, the hydraulic moving device 13 and the hydraulic moving device 13B are operated to apply tension to the new main ropes 4A of the first group and the new main ropes 4B of the second group to shorten the axial length, Load the new main rope 4
Add to A and 4B. At this time, as in the case described above, the two new main ropes 4A, which are less than the total number of main ropes,
Since the car 2 is temporarily supported by 4B and the same pressure is applied by the hydraulic moving devices 13 and 13B having the same structure, the new main ropes 4A and 4B have substantially equal initial elongations.
Thereafter, as shown in FIG. 9, the pressure oil in the hydraulic moving device 13C is returned to the hydraulic pressure generating source 21 to remove the hydraulic moving device 13C, and the thimble rod 10c is connected to the frame 3a of the counterweight 3 via the spring 31c.

Thereafter, as shown in FIG. 10, the hydraulic transfer device 13C is attached to the thimble rod 10c of the new main rope 4C again in the same manner as in FIG.
By operating both hydraulic moving devices 13 and 13C connected to C to apply tension to the new main rope 4A of the first group and the new main rope 4C of the second group to shorten the axial length,
Add the load of the car 2 to the new main ropes 4A, 4C.
At this time, as in the case described above, the car 2 is temporarily supported by the two new main ropes 4A and 4C, which are less than the total number of main ropes, and the same pressure is applied by the hydraulic moving device 13 having the same structure. Therefore, the new main ropes 4A and 4C have almost equal initial elongations. In this state, the new main rope 4
The hydraulic moving device 13B of B is removed, and its thimble rod 10b is balanced through the spring 31b to the frame 3a of the weight 3.
Connect to. After that, similarly to the case where the hydraulic moving device 13 connected to the existing main rope 4a is removed, both hydraulic moving devices 13 connected to the two new main ropes 4A and 4C are connected.
13C is removed, the tension of each new main rope 4A, 4B, 4C is adjusted, and the work is finished. Therefore, when all the new main ropes 4A, 4B, 4C are replaced at the same time, after that, when the initial extension and the normal extension occur with the passage of time and the predetermined length is reached, it is necessary to perform the trimming again. Since the initial elongation is adjusted at the time of replacement as described above,
Such work can be omitted.

Although the rope type elevator has been described in the above embodiments, the same can be applied to a hydraulic elevator. The total number of main ropes is not limited to three and can be applied. In any case, a plurality of combinations with at least one less than the total number of main ropes are made, and the new main rope on the side opposite to the elevator That is, in the above-described embodiment, a tensioning force is applied to the opposite side of the car to support the respective lifting bodies, which causes the initial extension of each new main rope during replacement work, and then each Since the anti-elevator side of the new main rope is connected, the initial extension can be generated and removed in a relatively short time and upon replacement.

[0016]

As described above, according to the method of replacing the elevator main rope of the present invention, the passenger car is supported by the hydraulic moving device using the first group of the main ropes originally provided. In the state, the main ropes of the second group are exchanged, and then the main ropes of the first group are exchanged while the car is supported by the hydraulic transfer device using the exchanged main ropes of the second group. Therefore, it is not necessary to support the car with a large-scale support member, and the main rope can be replaced easily and easily. Also, make a plurality of combinations in which the number of main ropes is less than the total number of main ropes, and apply a tensioning force to the anti-elevator side of the newly-installed main rope by each combination to support the elevators by supporting each elevator. Since the initial extension of the new main ropes is generated and then the anti-elevator side of each new main rope is connected, the same hydraulic transfer device can be used for replacement of the main ropes and absorption of the initial extension. At the same time, the initial elongation can be generated and removed.

[Brief description of drawings]

FIG. 1 is a front view of an elevator showing an initial state of work by a method of replacing an elevator main rope according to the present invention.

FIG. 2 is a front view of the elevator showing different initial work states according to the method of replacing the elevator main rope of the present invention.

FIG. 3 is a partial cross-sectional perspective view of a main rope hydraulic traction device used in the method for replacing an elevator main rope according to the present invention.

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

5 is a perspective view showing still another state of the main rope hydraulic traction device shown in FIG. 3. FIG.

FIG. 6 is a perspective view showing still another state of the main rope hydraulic traction device shown in FIG.

FIG. 7 is a front view of an elevator showing another different initial work state according to the method of replacing the elevator main rope of the present invention.

FIG. 8 is a front view of the elevator showing another different initial work state according to the method of replacing the elevator main rope of the present invention.

FIG. 9 is a front view of an elevator showing another different initial work state according to the method of replacing the elevator main rope of the present invention.

FIG. 10 is a front view of an elevator showing another different initial work state according to the method of replacing the elevator main rope of the present invention.

FIG. 11 is a side view of a general elevator to which the present invention is applied.

[Explanation of symbols]

 2 Cars 4a, 4b, 4c Main ropes 4A, 4B, 4C New main ropes 10a, 10b, 10c Thimble rods 11 Rod-shaped connecting members 13, 13B, 13C Hydraulic moving device

Claims (1)

[Claims] 1. An elevator main rope replacement method comprising a plurality of main ropes, at least one end of which is connected to a lifting body, wherein the existing main rope is replaced with a new main rope. The main ropes of the above 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 by the hydraulic moving device to support the lifting body. Then, replace the existing main rope of the second group with a new main rope, and then replace the main rope of the first group with the lifting body supported by the main rope of the second group. In addition, make a plurality of combinations of the new main ropes of the first group and the new main ropes of the second group, the number of which is smaller than the total number of main ropes. The anti-elevation body side of the rope is applied with a pulling force by the hydraulic moving device to support the elevating body respectively, and after the initial extension is generated in each of the new main ropes, An elevator main rope replacement method characterized in that the side opposite to the lifting body is connected.