JPH08324923A - Main rope tension adjusting device for elevator - Google Patents

Abstract

PURPOSE: To provide a main rope tension adjusting device for an elevator whereby adjusting main rope tension of an elevator can be easily further accurately performed. CONSTITUTION: In a main rope tension adjusting device 7 for an elevator having a plurality of main ropes 3 with both ends supported through a thimble rod 6, the device comprises a holding fixture 7a made capable of holding a rope socket 6a fixed to an end part of the main rope 3, moving means arranged just under this holding fixture 7a to move the holding fixture 7a and the thimble rod 6 in a direction of approaching each other, connecting ring 7e of receiving tension of the main rope, stress detector of detecting stress of the connecting ring 7e and a stress display device 7h of displaying stress through an amplifier 7g.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator main rope tension adjusting device for adjusting the main rope tension of an elevator.

[0002]

2. Description of the Related Art Generally, in an elevator, a car, which is a lifting body, is connected to the ends of a plurality of main ropes by a thimble rod, which is a connector, and the other end is similarly connected to a lifting body or a fixed body via a sheave. It is configured by being connected by a thimble rod. If the tensions of multiple main ropes are uneven, a specific main rope or an unbalanced load will be generated, which will cause abnormal wear of the main rope and sheave, and shorten the life of the main rope and sheave. For this reason, the tension of the main rope is adjusted uniformly when the elevator is installed, but since it varies over time, it is necessary to adjust the tension regularly. To adjust the tension of the main rope, use the adjustment nut of the thimble rod. To adjust the tension of the main rope, measure the length of the elastic body provided on each thimble rod, and tighten or loosen the adjustment nut that is hinged to the thimble rod so that the length of all elastic bodies is equal. Adjust the main rope tension. However, in order to make the tension variations of the main rope of several tens of meters to several hundreds of meters consistent with the length of the elastic body provided on the thimble rod, it is necessary to make fine adjustments by repeated work, and all elastic body lengths are required. Since it is difficult to adjust the values equally, some adjustment errors are allowed.
Here, since the spring constant of the elastic body used for the elevator is high, even a slight error results in a tension difference of several hundreds to several thousand newtons. Further, even if the lengths of the elastic bodies are uniform, the spring constant of the elastic bodies includes an error for each product in manufacturing, so that the tension varies.

[0003]

However, since the tension adjustment of the main ropes in the conventional elevator is based on the length of the elastic body of the thimble rod as described above, the tensions of the respective main ropes are accurately equalized. Is difficult to do.

It is an object of the present invention to provide an elevator main rope tension adjusting device which can easily and uniformly adjust the elevator main rope tension.

[0005]

In order to achieve the above object, the present invention provides a main rope tension adjusting device for an elevator having a plurality of main ropes, both ends of which are supported by thimble rods. A holder capable of holding a rope socket fixed to the portion, a moving means arranged immediately below the holder, for moving the holder and the thimble rod in such a way that they approach each other, and a joint ring for receiving the tension of the main rope. And a stress detector for detecting the stress of the joint ring and a stress indicator for displaying the stress via an amplifier, and are configured to have a stress measurable function.

[0006]

Since the present invention is configured as described above, the rope socket holder holds the rope socket of the thimble rod, and the moving means arranged immediately below is fixed to the rope socket holder and the rope socket holder. The thimble rod is moved toward the moving means. As a result, the load is removed from the thimble rod elastic body that has been subjected to the main rope tension, a gap is generated between the thimble rod elastic body and the fixed portion of the thimble rod, and the joint ring can be attached. The joint ring is installed between the elastic body of the thimble rod and the thimble rod fixing part, and by loosening the moving procedure,
It is sandwiched between the elastic body and the fixed part of the thimble rod and is compressed by the main rope tension. The stress detector is attached to the joint ring and detects the stress of the joint ring. The stress indicator displays the output of the stress detector via the amplifier. In this way, by providing the stress measuring function in each thimble rod, the tension of each main rope can be accurately known, and the adjustments can be easily made to align all the main rope tensions.

[0007]

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

FIG. 2 is a side view of an elevator using a main rope tension adjusting device for an elevator according to an embodiment of the present invention.

The main rope 3 hung on the sheave 2 provided on the output shaft of the hoisting machine 1 is connected to both ends of a car 4, which is a lifting body, with a counterweight 5 via thimble rods 6. ing. In order to adjust the tension of the main rope in this configuration, the main rope tension adjusting device 7 is used at the fixing portion 8 of the thimble rod 6 of the elevator car 4 or the counterweight 5 as shown in FIG.

The main rope tension adjusting device 7 has a rope socket holder 7a engaged with the rope socket 6a of the thimble rod 6, and the rope socket holder 7a.
Is a connecting member 7b having a threaded portion at the upper end and a hook at the lower end.
Is supported by a nut 7c on the upper part of the above, and a rope 7d which is a gripping part wound around the elevating body 4 or 5 is attached to a lower end hook part of the connecting member 7b.

As shown in FIG. 3, the joint ring 7e is a pipe having a notch having a diameter larger than the axial diameter of the thimble rod 6, and a stress detector 7f is attached to the outer peripheral surface or the inner peripheral surface thereof.
The stress detector 7f is sandwiched between the elastic body 6b of the thimble rod 6 and the fixed portion 8 of the thimble rod 6 to detect the compressive stress of the joint ring 7e which receives a compressive load. Stress indicator 7h
Displays the output from the stress detector 7f via the amplifier 7g.

As shown in FIG. 1, the tension adjusting method for a plurality of elevator main ropes 3 is as follows. First, a thimble rod 6 of the elevator is connected to a rope socket holder 7a which is a component of the main rope tension adjusting device 7. The member 7b, the nut 7c, and the grip portion 7d are attached. In this state, nut 7c
When is tightened, the tension of the main rope 3 applied to the elastic body 6b of the thimble rod 6 is received by the main rope tension adjusting device 7 and is removed. Nut 7c
Then, a gap is formed between the elastic body 6b and the fixed portion 8 and the joint ring 7e is inserted. After attaching the joint ring 7e to each thimble rod and loosening the nut 7c in this state, the joint ring 7e
Is sandwiched between the elastic body 6b and the fixing portion 8 of the thimble rod, and when it is further loosened, the tension of the main rope 3 is completely removed.
It will be e.

The tension of each main rope 3 is displayed on the stress indicator 7h via the amplifier 7g as the stress of the connecting ring 7e. The operator adjusts the tension of the main rope 3 with the adjusting nut 6c of the thimble rod 6 so that the stress value becomes uniform. After adjusting the tension of the main rope 3, the main rope tension adjusting device 7 is removed.

Further, as a second embodiment, as shown in FIG. 4, instead of the connecting ring 7e, the stress detector 7f and the stress indicator 7h among the constituent parts of the main rope tension adjusting device 7, a load detecting device is used. The same effect can be obtained by using the instrument 7i and the load indicator 7j.

In the third embodiment, when the connecting ring 7e, the stress detector 7f and the stress indicator 7h are used, the main rope 3 is loosened and attached using, for example, an emergency stop device provided in the car. However, it is possible to adjust the tension of the main rope.

As described above, according to the present embodiment, the tension of the elevator main rope 3 can be adjusted easily and accurately.
Since the construction and maintenance can be improved and the tension of the main rope 3 can be prevented from being uneven, uneven wear of the main rope 3 and the sheave 2 can be prevented, which has the effect of extending the product life.

[0017]

As described above, the elevator main rope tension adjusting apparatus according to the present invention is, as described above, a holder capable of holding a rope socket fixed to an end portion of a main rope of an elevator, and a holder of this holder. A moving means that is arranged immediately below and that moves the holder and the thimble rod toward each other, a joint ring that receives the tension of the main rope, a stress detector that detects the stress of the joint ring, and an amplifier. It consists of a stress indicator that displays the stress, and since it has the function of measuring stress, the tension of the main rope of the elevator can be adjusted easily and accurately, thus improving the workability, maintainability, and fluctuation of the main rope tension. Since it can prevent the uneven wear of the main rope and sheave, it has the effect of extending the product life.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view of an elevator using a main rope tension adjusting device for an elevator according to an exemplary embodiment of the present invention.

3 is a perspective view of a main rope tension adjusting device for the elevator shown in FIG. 1. FIG.

FIG. 4 is a perspective view showing a second embodiment of the present invention.

[Explanation of symbols]

 1 hoisting machine 2 sheave 3 main rope 4 car 5 counterweight 6 thimble rod 6a rope socket 6b elastic body 6c adjusting nut 7 main rope tension adjusting device 7a rope socket retainer 7b connecting member 7c nut 7d gripping part 7e connecting ring 7f Stress detector 7g Amplifier 7h Stress display part 8 Thimble rod fixing part

Claims (2)

[Claims] 1. A main rope tension adjusting device for an elevator having a plurality of main ropes, both ends of which are supported via thimble rods, and a holder capable of holding a rope socket fixed to an end portion of the main rope. Arranged directly below this holder, a moving means for moving the holder and the thimble rod in a manner to approach each other, a joint ring that receives the tension of the main rope, and a stress detector that detects the stress of the joint ring, A main rope tension adjusting device for an elevator, which comprises a stress indicator for displaying stress via an amplifier and has a function capable of measuring stress. 2. The main rope tension adjusting device comprises a joint ring having a notch having a diameter larger than the thimble rod shaft and a detector for detecting axial stress of one or more thimble rods provided on the circumference of the joint ring. 2. The main rope tension measuring device for an elevator according to claim 1, further comprising: a stress indicator for displaying the stress output through the amplifier.