JPH09216778A - Wire rope device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator wire rope device whose tensile force can be regulated simply and in a short time in spite of a plurality of wire ropes extended over between an elevator cage and a balancing weight. SOLUTION: The wire rope device 12 of a dumb waiter DW is equipped with one wire rope 18 fixed to the elevator cage 11 at both its ends and a wire rope supporting mechanism 19 which is attached to a balance weight 13 and turnedly supports wire rope 18. The wire rope 18 is turned up through the suspended wheel of the wire rope supporting mechanism 19, and extended over between the elevator cage 11 and the balance weight 13 at plural times. The tensile force of the wire rope can be automatically regulated by the rotation of the suspended wheel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator having a counterweight and suspending and supporting the counterweight and an elevator car with a plurality of wire ropes.

[0002]

2. Description of the Related Art An elevator is known in which an elevator car is moved up and down in a hoistway while balancing a counterweight according to a loaded weight. In an elevator of this kind, particularly a dam weighter dedicated to carrying a load, a plurality of, for example, two wire ropes are used to connect the elevator car and the counterweight to each other. The wire rope is wound around a sheave of a hoist installed behind the ceiling surface of the hoistway. When the hoisting machine operates, the wire rope is displaced in the vertical direction of the elevator according to the rotation of the sheave. This displacement raises and lowers the elevator car.

[0003]

Generally, in an elevator having a plurality of wire ropes, the wire rope extends over time due to the weight of an elevator car or a counterweight, and thus the tension changes for each wire rope. . Therefore, work to balance the tensions of a plurality of wire ropes is required at any time.

In the above-mentioned conventional dam weighter, a double nut is tightened at the tip of each wire rope that penetrates the weight frame of the counterweight, and the wire rope is attached to the weight of the counterweight through the rope pull-out preventing action of the double nut on the weight frame. It is fixed to the frame. Therefore, at the time of adjusting the tension, the maintenance personnel who got down the hoistway re-tighten the double nut.

However, in such a working method,
The two double nuts must be individually tightened, making it difficult to balance the tension of the two wire ropes. Moreover, it is necessary to repeat the re-tightening work until the tension is balanced.

[0006] The present invention has been made in view of the above-mentioned circumstances, and the tension of the wire rope can be adjusted easily and in a short time despite the fact that a plurality of wire ropes are passed between the elevator car and the counterweight. An object of the present invention is to provide a wire rope device for an elevator that can be operated.

[0007]

To achieve the above object, according to the first invention, at least one wire rope having two ends fixed to either an elevator car or a counterweight, An elevator car attached to at least one of an elevator car and a counterweight, around which a wire rope is wound, and the wire rope is folded back to pass the wire rope a plurality of times between the elevator car and the counterweight. A wire rope device is provided.

According to this structure, the tension of each wire rope passed between the elevator car and the counterweight is easily balanced by the movement of the suspension vehicle that supports the wire rope in a folded manner.

According to a second aspect of the invention, in the elevator wire rope device according to the first aspect of the invention, there is provided a support for supporting the suspension vehicle, and a fastening means for fastening and fixing the wire rope to the support. It is characterized by

According to this structure, the position of the balanced wire rope can be fixed by fixing the wire rope to the support.

[0011]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an elevator device, ie, a dam weighter, to which an elevator wire rope device according to the present invention is applied. The dam waiter DW includes an elevator car 11 that moves up and down the hoistway 10. A counterweight 13 is connected to the elevator car 11 via a wire rope device 12 described later. A hoist 16 having a sheave 15 is installed in a machine room 14 formed behind the ceiling of the hoistway 10, and the counterweight 13 and the elevator car 11 are suspended from the sheave 15 by a wire rope device 12. Lowered and supported. The elevator car 11 is electrically driven by the hoist 16 while balancing the weight with the counterweight 13 through the rotation of the sheave 15. Such a dam waiter DW is generally simple and small in size and cannot be used by personnel, and is used for catering to restaurants.

The wire rope device 12 comprises a wire rope 18 whose both ends are fixed to the elevator car 11 by means of fasteners 17. An intermediate portion of the wire rope 18 is connected to the counterweight 13 by a wire rope support mechanism 19 attached to the counterweight 13.

As is apparent from FIGS. 2 and 3, the wire rope support mechanism 19 includes a suspension wheel 20 around which the wire rope 18 is wound, and a support body 21 that rotatably supports the suspension wheel 20. The wire rope 18 is folded back by the suspension vehicle 20, and as a result, the wire rope 18
Will be passed between the elevator car 11 and the counterweight 13 a plurality of times. In the present embodiment, the two wire ropes 18 have an effect of suspending and supporting the elevator car 11 and the counterweight 13.

The support 21 includes a suspension vehicle frame 22 to which the rotation shaft of the suspension vehicle 20 is fixed and which surrounds the suspension vehicle 20 from the front, the back, the top, and the bottom.
A pair of through bolts 23 that are parallel to each other and penetrate the suspension frame 22 in the vertical direction are provided. The suspension car frame 22 is sandwiched from above and below using a pair of lock nuts 24 and positioned and fixed to each through bolt 23. Through bolt 2
The lower end of 3 penetrates the upper frame portion of the weight frame of the counterweight 13, and is prevented from coming off by the double nut 25. In this way, the support body 21 is connected to the weight frame of the counterweight 13.

As shown in FIG. 2, the folded wire rope 18 is fastened and fixed to each through bolt 23 by a pair of rope clips 26 as a fastening means.

Next, the operation of the present embodiment will be described. In installing the dam waiter, first, one end of the wire rope 18 is fixedly fixed by using the fastener 17 to the elevator car 1
Attach to 1. The wire rope 18 is sequentially wound around the sheave 15 and the hoisting wheel 20 of the hoisting machine 16. Hanging car 2
Wire rope 18 folded back by 0 again sheave 1
Wrap it around 5. The other end of the wire rope 18 extending downward from the sheave 15 is fixedly attached to the elevator car 11 using the stopper 17. As a result, it is possible to obtain the same effect as when the two ropes are hung, although the single wire rope 18 is used.

Between the elevator car 11 and the counterweight 13, which are suspended and supported by the folded wire rope 18, the weights of the elevator car 11 and the counterweight 13 act so that the suspension vehicle 2
Through the rotation of 0, the tension between the forward wire rope 18 and the backward wire rope 18 is automatically balanced (equalized) by the weight of both. After confirming this balance, as shown in FIG. 4, the wire rope 18 is tightened and fixed to the through bolt 23 using the rope clip 26. As a result, the movement of the wire rope 18 is blocked while the tension of the wire rope 18 is balanced, and the swing of the elevator car 11 is prevented.

When the tension is readjusted, the rope clip 26
Is loosened, the tension of the wire rope 18 is adjusted, and after the adjustment, the rope clip 26 may be firmly tightened again. As a result, the tension of the wire rope 18 can be adjusted easily and in a short time as compared with the conventional one. In the present embodiment, since the wire rope support mechanism 19 is provided on the counterweight 13 side, it is particularly suitable when there is a space in the ceiling surface of the hoistway 10 on the counterweight 13 side.

FIG. 5 shows a dam weighter in which the wire rope support mechanism 19 is provided on the side of the elevator car 11 unlike the above-described embodiment. The same components as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

This embodiment is particularly suitable when the ceiling surface of the hoistway 10 on the elevator car 11 side has a space. When adjusting the wire rope 18, the rope clip 26 can be easily loosened and tightened in the door open state at the entrance / exit for stopping the elevator car 11 of the hoistway 10.

In the above-described embodiment, the wire rope 18 is folded back by using one suspension wheel 20, but two suspension wheels 30 arranged in parallel in the horizontal direction may be used as shown in FIG. Supporting body 3 for rotatably supporting the suspension vehicle 30
1 is fixed to the elevator car 11 via a plurality of bolts 32. If the elevator car 11 is supported by the two suspension wheels 30 in this manner, the elevator car 11 can be supported more stably. After adjusting the tension between the two suspension wheels 30, the wire rope 1 is attached by the rope clip 33.
8 can be clamped and fixed to the support 31,
It is also possible to reduce the number of rope clips used.

The weight frame of the counterweight 13 and the double nut 2
It is also possible to insert a spacer between the wire ropes 5 and 5 so that the tension of each wire rope 18 can be supplementarily adjusted by inserting and removing the spacer.

[0024]

As described above, according to the present invention, the tension of the wire rope can be easily adjusted in a short time despite the fact that a plurality of wire ropes are passed between the elevator car and the counterweight. You can

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a dam weighter to which a wire rope device according to the present invention is applied.

FIG. 2 is an enlarged sectional view of a wire rope support mechanism.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a diagram showing a method of fixing a wire rope.

FIG. 5 is a schematic configuration diagram of a dam weighter when the wire rope support mechanism is attached to the elevator car side.

FIG. 6 is an overall configuration diagram of a wire rope support mechanism using two suspension wheels.

[Explanation of symbols]

11 elevator cars, 13 counterweights, 18 wire ropes, 20 suspension wheels, 21 supports, 26 rope clips as tightening means.

Claims (2)

[Claims] 1. At least one wire rope having two ends fixed to either an elevator car or a counterweight, and a wire rope attached to at least one of the elevator car and the counterweight to wind the wire rope. A wire rope device for an elevator, comprising: a suspension vehicle, wherein the wire rope is folded back and passed between the elevator car and the counterweight multiple times. 2. The elevator wire rope device according to claim 1, further comprising: a support member that supports the suspension vehicle; and a tightening unit that tightens and fixes the wire rope to the support member. Wire rope device.