JPH0899784A - Rope tension regulating device of rope type elevator - Google Patents

Abstract

PURPOSE: To provide a rope tension regulating device which can regulate a rope in an even rope tension simply, as well as can prevent the loosening of the rope following a tension variation in a rope running condition. CONSTITUTION: A shackle rod 6 connected and fixed to a rope terminal is inserted to the hole of a rope stopping beam 4, and a nut 7 is screwed to the tip side of the shackle rod 6. Between the rope stopping beam 4 and the nut 7, a spring 8 and an auxiliary spring 20 are contracted and provided in serias. And the auxiliary spring 20 is set at a spring constant to be made in a full compressive condition when it is compressed by a load of the value by dividing the full load apllied to all the main ropes, by the number of the main ropes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope for fixing a rope of a rope type elevator, for example, an end portion of a main rope, and in particular, the rope tension can be easily adjusted and the rope is loosened due to the tension fluctuation during traveling of a car. The present invention relates to a rope tension adjusting device capable of preventing the above.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view showing a conventional rope tension adjusting device described in, for example, Japanese Patent Laid-Open No. 3-177289. In the figure, 1 is a machine room provided above the hoistway 2, 3 is a floor of the machine room 1, 4 is a rope stop beam as a fixing member installed in the machine room 1, and 5 is a lower portion of the rope stop beam 4. Is a support frame attached to. Reference numeral 6 denotes a shackle rod connected and fixed to the end of the main rope. The shackle rod 6 is provided with a hole 3a formed in the floor 3 of the machine room 1 from the hoistway 2 side and a hole 5a formed in the support frame 5. And ropes 4
Is inserted into the machine room 1 through the hole 4a formed in
A nut 7 is screwed on the tip side thereof. Reference numeral 8 denotes a ridge which is penetrated by the shackle rod 6 and contracted between the ropes 4 and the nut 7. The ridge 8 presses and urges the shackle rod 6 upward through the nut 7 in the figure. There is. An upper spring seat 9 is installed between the spring 8 and the nut 7, and a lower spring seat 10 is installed between the spring 8 and the rope stop beam 4. Reference numeral 11 is a detection tube that penetrates through the hole 4a of the rope stop beam 4 and is loosely fitted to the shackle rod 6, and 12 is penetrated by the shackle rod 6, and between the first spring seat 13 and the second spring seat 14. It is a pressing spring that is sandwiched and installed in the support frame 5 and presses and biases the detection cylinder 11 upward in the drawing via the first spring seat 13. Reference numeral 15 is a reference mark formed on the outer peripheral surface of the detection cylinder 11.

[0003] Here, for roping in a high-speed elevator, although not shown, for example, a main rope having one end attached to a machine room is hung on a pulley installed on an upper part of a counterweight and installed in the machine room. Hang it on the drive sheave,
After passing through the deflection car, hang it on the pulley installed at the top of the car,
The other end is attached to the machine room. Then, shackle rods are connected and fixed to both ends of the main rope, and are fixed by the tension adjusting device shown in FIG.
The elevator is usually suspended by a plurality of main ropes.

Next, the operation of the above conventional rope tension adjusting device will be described. The load of the car etc. is divided and applied to each of the main ropes. The load applied to each main rope is applied to the spring 8 via the shackle rod 6. Therefore, the spring 8 is expanded and contracted so that the elastic biasing force balances the load. On the other hand, the inspection cylinder 11 has one end side of the nut 7 due to the elastic biasing force of the pressing bar 12.
Is always in contact with the bottom of the. Therefore, the position of the reference mark 15 formed on the outer peripheral surface of the inspection cylinder 11 moves up and down according to the amount of expansion and contraction of the rib 8. When the tension applied to the main rope fluctuates while the car is traveling and the rope tension becomes weak, the main rope is loosened. Then, the spring 8 extends so as to generate an elastic biasing force that balances the weakened rope tension, and the shackle rod 6 is pushed up, so that the main rope is not loosened. At this time, since the nut 7 is pushed up, the inspection cylinder 11 moves upward and the reference mark 15
Will move upwards. Further, when the rope tension becomes strong due to the fluctuation of the tension, an elastic urging force is generated so as to generate an elastic biasing force that balances with the rope tension.
Contracts, and the shackle rod 6 lowers by the contraction of the spring 8. Then, the inspection cylinder 11 moves downward and the reference mark 15
Will move downwards.

Therefore, at the time of maintenance, the position of the reference mark 15 of each inspection cylinder 11 is visually observed through the gap between the ribs 8 to determine the fluctuation of the rope tension applied to the main rope. Then, while measuring the position of the reference mark 15 of each inspection cylinder 11, so that the position of the reference mark 15 coincides with the reference position,
Tighten or loosen the nut 7 to adjust the tension of the main rope to a predetermined tension.

[0006]

As described above, in the conventional rope tension adjusting device for an elevator, the inspection cylinder 11 is elastically biased upward by the pressing bar 12 via the first barring seat 13, and Since it is configured to penetrate the hole 4a of the rope stop beam 4, the lower bar seat 10, the bar bar 8 and the upper bar seat 9, there is a problem that the structure is complicated and assembly and mounting are difficult. It was Further, since the reference mark 15 serving as a guide for tension adjustment is inside the rib 8, there is a problem that the tension adjustment work becomes complicated. further,
It is only the restoring force of the spring 8 due to the spring constant that compensates for the bending of the main rope loosened due to the tension fluctuation, and the spring constant of the spring 8 is set to a large amount, so the restoring amount is small. Therefore, especially when the deflection amount due to the tension variation is large because the length of the main rope is long, such as in a high-lift elevator, the spring 8 with a large spring constant cannot sufficiently absorb the deflection amount of the main rope. . As a result, there has been a problem that the ropes are entangled with each other due to the bending of the main rope, and there is a risk that the rope may come off or the rope may be broken.

The present invention has been made in order to solve the above problems, and is in a fully compressed state when compressed by a load obtained by dividing the total load applied to all of a plurality of ropes by the number of ropes. The auxiliary spring with the spring constant set in this way is arranged in series with the conventional spring so that the bending of the rope can be absorbed by the auxiliary spring, the rope tension can be easily adjusted, and the large amount of bending of the rope can be absorbed sufficiently. The purpose is to obtain a rope tension adjusting device for a rope type elevator that can be used.

[0008]

According to the present invention, there are provided a fixing member, a plurality of shackle rods, the rear ends of which are connected and fixed to the ends of a plurality of ropes, respectively, and the distal ends of which are arranged through the fixing members. Rope rope elevator including nuts screwed to respective tip sides of the shackle rods, and tension adjusting members inserted between the shackle rods and arranged between the fixing member and the nuts In the tension adjusting device, when the tension adjusting member compresses with a spring that expands and contracts according to the load applied to each of the plurality of ropes and the total load applied to all of the plurality of ropes is divided by the number of ropes. It is configured by arranging in series a supplementary spring having a spring constant that provides a fully compressed state.

[0009]

In the present invention, when the load is evenly applied to each of the plurality of ropes, the auxiliary spring is in a fully compressed state. Therefore, when the rope tension fluctuates during traveling of the rope and the rope tensions of a plurality of ropes become uneven, the auxiliary spring corresponding to the rope whose rope tension is weakened extends. The extension of the auxiliary spring pushes up the shackle rod, pulls the rope, and loosens the rope. On the other hand, since the auxiliary bar corresponding to the rope with a stronger rope tension is already fully compressed, it does not function as a bar,
The spring arranged in series with the auxiliary spring contracts. Also, by tightening or loosening the nut,
The amount of expansion and contraction of the spring and the auxiliary spring is adjusted, and the tension of the rope is adjusted. Then, if the tensions of the ropes are adjusted so that the auxiliary springs are fully compressed, the ropes are adjusted to have uniform tensions.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a cross-sectional view showing a rope tension adjusting device for a rope type elevator according to a first embodiment of the present invention. In the figure, the same or corresponding parts as those of the conventional rope tension adjusting device shown in FIG. The description is omitted. In the figure, reference numeral 20 denotes an auxiliary spring, which is penetrated by the shackle rod 6 and is arranged in series with the elastic spring 8 between the upper spring seat 9 and the lower spring seat 10 via an intermediate spring seat 21. ing. The spring constant of the auxiliary arrangement 20 is set so that it is in a fully compressed state when compressed by a load obtained by dividing the total load applied to all of the plurality of main ropes by the number of main ropes. In addition, spring 8 and auxiliary spring 2
The tension adjusting member is composed of zero and zero.

Next, the operation of the first embodiment will be described. An auxiliary spring 20 and a spring 8 are arranged in series between a rope stop beam 4 and a nut 7 screwed to the tip side of the shackle rod 6. Therefore, the load applied to the main rope is applied in series to the auxiliary spring 20 and the spring 8 via the shackle rod 6. Here, the spring constant of the auxiliary spring 20 is set so as to be in a fully compressed state when compressed by a load obtained by dividing the total load applied to all of the plurality of main ropes by the number of main ropes. When the load applied to the main rope is uniform, that is, the rope tension is uniform, the auxiliary spring 20 is in the fully compressed state. When the tension applied to the main rope fluctuates while the car is traveling and the rope tension becomes weak, the main rope is loosened. Then, the auxiliary spring 20 mainly extends so as to generate an elastic biasing force that balances the weakened rope tension, and the shackle rod 6 is pushed up, so that the main rope is not loosened. At this time, along with the extension of the auxiliary spring 20,
A gap is created between the coils of the auxiliary spring 20. Also, when the rope tension becomes strong due to the tension fluctuation, the auxiliary bar 20 in the fully compressed state does not function as a bar,
The spring 8 contracts so as to generate an elastic biasing force that balances the rope tension, and the shackle rod 6 lowers by the contraction of the spring 8.

Therefore, at the time of maintenance, the auxiliary rod 2
By visually observing whether or not there is a gap between the 0 coils, the rope tension applied to the main rope is judged to be non-uniform. If there is a gap between the coils of the auxiliary spring 20, the nut 7 is tightened so that the gap between the coils is eliminated. If there is no gap between the coils of the auxiliary spring 20, first loosen the nut 7 until a gap occurs between the coils to alleviate the contraction of the spring 8, and then remove the nut 7 so that the gap between the coils disappears. Tighten and adjust the tension of the main rope to the specified tension.

As described above, according to the first embodiment, the auxiliary load set so that the full load is applied to all the plurality of main ropes when the load is divided by the load divided by the number of main ropes. Since the ridge 20 is arranged in series with the ridge 8, the auxiliary ridge 2 corresponding to the main rope whose rope tension has weakened due to fluctuations in the rope tension during traveling of the rope
0 is extended corresponding to the reduction of tension, and the shackle rod 6 is pushed up by the extension of the auxiliary spring 20 to suppress the occurrence of rope slack. Therefore, the entanglement of the ropes due to the bending of the main rope is suppressed, and it is possible to prevent the rope from coming off and the rope from breaking. Further, like the conventional rope tension adjusting device, the inspection cylinder 1 that receives the upward elastic bias of the pressing bar 12 via the first bar seat 13.
1 does not need to be configured to penetrate the hole 4a of the rope stop beam 4, the lower ridge seat 10, the ridge 8, and the upper ridge seat 9, and the structure can be simplified and the assembling and mounting can be simplified. Furthermore, the nut 7 can be tightened or loosened so that the gap between the coils of the auxiliary spring 20 is eliminated, and the tension can be adjusted to a uniform tension, improving the workability of adjusting the tension.
Work time can be shortened.

Example 2. FIG. 2 is a sectional view showing a rope tension adjusting device applied to a 1: 1 roping rope type elevator according to Embodiment 2 of the present invention. In the figure, 2
Reference numeral 2 denotes, for example, a rope stopper plate as a fixing member that is horizontally installed between the upper portions of the opposing walls in the upper beam 23 of the car. The rope stopper plate 22 and the upper beam 23 have a hole 22a through which the shackle rod 6 is passed. , 23a are provided.

Here, in the 1: 1 roping, although not shown, for example, a main rope having one end attached to a counterweight is hung on a drive sheave installed in a machine room and attached to a car through a deflector. ing. A shackle rod is connected and fixed to both ends of the main rope, and is fixed to the car and the counterweight by the tension adjusting device shown in FIG. The elevator is usually suspended by a plurality of main ropes.

To assemble this tension adjusting device, first, the shackle rod 6 connected and fixed to the end of the main rope is inserted into the holes 23a and 22a. Then, from the tip side of the shackle rod 6 to the shackle rod 6, the upper spring seat 9, the spring 8, the intermediate spring seat 21, the auxiliary spring 20 and the lower spring seat 1 are formed.
Insert 0 sequentially. After that, a nut 7 is screwed on the tip side of the shackle rod 6, and the spring 8 and the auxiliary spring 20 are contracted in series between the rope stopper plate 22 and the nut 7 for assembly. At this time, the spring constant of the auxiliary arrangement 20 is set to be in a fully compressed state when compressed by a load obtained by dividing the total load applied to all of the plurality of main ropes by the number of main ropes, If the load on each main rope is uniform, that is, the rope tension is uniform,
The auxiliary spring 20 is in a fully compressed state.

Since the second embodiment is configured as described above, it operates similarly to the first embodiment. Therefore,
Also in the second embodiment, the same effect as that of the first embodiment can be obtained.

In each of the above embodiments, the auxiliary spring 20 is arranged on the side of the nut 7, but the spring 8 and the auxiliary spring 20 may be arranged in series, and the spring 8 may be the nut 7. It may be disposed on the side.

In each of the above-described embodiments, the description has been given as applied to a main rope for suspending a car and a counterweight, but the present invention is not limited to this, and for example, a car-side counterweight. The same effect can be obtained even when applied to a compensating rope that corrects the gravity difference on the side.

[0020]

As described above, according to the present invention, a fixing member and a plurality of shackle rods, the rear end side of which is connected and fixed to the ends of a plurality of ropes, and the distal end side of which is disposed through the fixing member, are provided. , A rope-type elevator including nuts screwed to respective tip sides of a plurality of shackle rods, and a tension adjusting member inserted between each of the plurality of shackle rods and arranged between a fixing member and the nut In the rope tension adjusting device of, the tension adjusting member compresses by a spring that expands and contracts according to the load applied to each of the plurality of ropes and the total load applied to all of the plurality of ropes divided by the number of ropes. Since it is configured by arranging in series an auxiliary spring having a spring constant that will be in a fully compressed state when it is opened, the structure is simplified, the assembly and installation are simplified, and the tension is adjusted. Improvement of workability is achieved, there is a further effect of the rope tensioning device roped elevator is obtained which can reliably prevent loosening of the rope caused by the variation of the rope tension in the rope running.

[Brief description of drawings]

FIG. 1 is a sectional view showing a rope tension adjusting device for a rope type elevator according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a rope tension adjusting device applied to a rope elevator of 1: 1 roping according to Embodiment 2 of the present invention.

FIG. 3 is a cross-sectional view showing a conventional rope tension adjusting device for a rope type elevator.

[Explanation of symbols]

4 Tether beams (fixing members), 6 Shackle rods, 7
Nut, 8 springs (tension adjusting member), 20 auxiliary springs (tension adjusting device), 22 rope fixing plate (fixing member).

Claims (1)

[Claims] 1. A fixing member, a plurality of shackle rods whose rear end side is connected and fixed to ends of a plurality of ropes, respectively, and whose front end side is arranged to penetrate through the fixing member, and each of the plurality of shackle rods. A rope tension adjusting device for a rope-type elevator including a nut screwed to a tip end side and a tension adjusting member that is inserted between each of the plurality of shackle rods and is arranged between the fixing member and the nut. In, when the tension adjusting member is compressed by a spring that expands and contracts according to the load applied to each of the plurality of ropes and a total load applied to all of the plurality of ropes divided by the number of ropes A rope tension adjusting device for a rope-type elevator, characterized in that the rope tension adjusting device is configured by arranging in series a supplementary spring having a spring constant that provides a fully compressed state.