WO2002038481A1

WO2002038481A1 - Main rope elongation compensating device for elevator

Info

Publication number: WO2002038481A1
Application number: PCT/JP2000/007847
Authority: WO
Inventors: Tomohiko Yao
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2000-11-08
Filing date: 2000-11-08
Publication date: 2002-05-16
Also published as: EP1357074A4; DE60042499D1; EP1357074A1; EP1357074B1; JPWO2002038481A1; CN1217846C; CN1420838A

Abstract

A main rope elongation compensating device for elevator, wherein a rotatable adjusting sheave (6) coming in contact with a main rope (3) is disposed displaceably between a drive sheave (1a) and a deflector wheel (2), whereby, because the adjusting sheave (6) is allowed to displace, the length of the main rope (3) between the drive sheave (1a) and the deflector wheel (2) is varied so as to absorb the elongation of the main rope (3).

Description

Technical description Main rope elongation compensator in Ellebe

The present invention is provided in an elevator that uses a synthetic fiber rope as a main rope, and is designed to appropriately maintain a positional relationship between a car and a counterweight in response to a change in the length of the main rope due to seasonal variation or the like. The present invention relates to a main rope elongation compensating device for ELEBE. Background art

Conventionally, in an elevator using steel ropes as main ropes, the amount of expansion and contraction of the main rope due to seasonal fluctuations, etc. is very small with respect to the replacement cycle of the main rope. The adjustment of the length was made.

However, when a synthetic fiber rope is used as the main rope, the elongation due to the influence of humidity, etc. is greater than that of a steel rope, and frequent length adjustment is required. For this reason, adjustment at the end of the main rope is not sufficient. Disclosure of the invention

The present invention has been made to solve the above-described problems, and has a main rope elongation compensation system that can sufficiently cope with a change in the length of a main rope made of a synthetic fiber rope. The aim is to obtain a device.

The main rope elongation compensating device for an elevator according to the present invention is configured such that the main rope for suspending the car and the counterweight is composed of a synthetic fiber rope, and is wound around a driving sheave of a driving device and a deflecting wheel. It is displaced between the drive sheave and the deflecting vehicle and is in contact with the main rope, and is displaced between the driving sheave and the deflecting vehicle by being displaced. It has a rotatable adjustment sheave that changes the length of the main rope. BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is a configuration diagram showing an elevator having a main rope elongation compensating device according to Embodiment 1 of the present invention,

FIG. 2 is a perspective view showing the structure of the main rope of FIG. 1,

FIG. 3 is a configuration diagram showing an elevator having a main rope elongation compensator according to Embodiment 2 of the present invention.

FIG. 4 is a configuration diagram showing an elevator having a main rope elongation compensating device according to Embodiment 3 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1

FIG. 1 is a configuration diagram showing an elevator having a main rope elongation compensating device according to Embodiment 1 of the present invention.

In the figure, a driving device 1 and a deflector 2 are installed at the upper part of the hoistway.c A main sheave 3 composed of a synthetic fiber rope is mounted on the driving sheave 1a and the deflector 2 of the driving device 1. It is wound. A car 4 is suspended from one end of the main rope 3. A counterweight 5 is suspended from the other end of the main rope 3.

Between the drive sheave 1 a and the deflector wheel 2, a rotatable adjustment sheave 6 in contact with the main rope 3 is arranged. The adjustment sheave 6 is guided by the guide device 8 and linearly slid and displaced by the driving force of the sheave drive device 7 having the speed reducer. When the adjustment sheave 6 is displaced, the length of the main rope 3 between the drive sheave 1a and the deflector wheel 2 is changed.

The adjustment sheave 6 is disposed on the opposite side of the main sheave 3 from the drive sheave 1 a and the deflector 2.

In the hoistway, a detection device 9 that detects a change in the length of the main rope 3 is arranged. As the detecting device 9, for example, an evening for detecting the position of the marking provided on the main rope 3, or an evening for detecting the position of the counterweight 5 when the car 4 is located on a predetermined floor, etc. Is used. Further, the position of the marking or the counterweight 5 can be detected by, for example, an optical switch or a mechanical microswitch. In the first embodiment, the sheave driving device 7 is driven in accordance with a signal from the detection device 9, and the position of the adjustment sheep 6 is automatically adjusted. The main rope elongation compensating device has an adjusting sieve 6, a sheave driving device 7, a guide device 8, and a detecting device 9. FIG. 2 is a perspective view showing the structure of the main rope 3 in FIG. In the figure, an inner strand layer 24 having a plurality of inner strands 22 and a filling strand 23 arranged in a gap between the inner strands 22 is arranged around the core wire 21. ing. Each internal strand 22 is composed of a plurality of aramide fibers and an impregnating material such as polyurethane. The filling strand 23 is made of, for example, polyamide.

An outer strand layer 26 having a plurality of outer strands 25 is arranged on the outer periphery of the inner strand layer 24. Each outer strand 25, like the inner strand 22, is composed of a plurality of aramide fibers and an impregnating material such as polyurethane.

Between the inner strand layer 24 and the outer strand layer 26, a friction-reducing coating layer 27 for preventing abrasion of the strands 22 and 25 due to friction between the strands 22 and 25 is provided. Are located. In addition, a protective coating layer 28 is arranged on the outer periphery of the outer strand layer 26.

The synthetic fiber rope having the above-described structure has a higher friction coefficient and is more flexible than a steel rope.

In such a main rope elongation compensating device, when the elongation of the main rope 3 is detected by the detecting device 9, the sheave driving device 7 is automatically driven in accordance with a signal from the detecting device 9, and the adjusting system is adjusted. 1 is slid downward along the guide device 8 in FIG. As a result, as shown by the two-dot chain line in FIG. 1, the length of the main rope 3 between the drive sheave 1a and the deflector 2 is increased, and the entire length of the main rope 3 is absorbed. You. When the positional relationship between the car 4 and the counterweight 5 returns to an appropriate state, the movement of the adjustment sheave 6 is automatically stopped.

Conversely, when the contraction of the main cable 3 is detected, the adjustment sheave 6 is displaced upward in FIG. 1 to obtain the length of the main cable 3 between the driving sheave 1 a and the deflector wheel 2. And the amount of shrinkage of the entire main cable 3 is absorbed. Therefore, according to the main rope elongation compensator as described above, even if the main rope 3 made of a synthetic fiber rope expands and contracts, the positional relationship between the car 4 and the counterweight 5 is maintained in an appropriate state. Further, since the adjustment sheep 6 is guided by the guide device 9 and is linearly slid, the adjustment sheep 6 can be displaced stably.

Further, when the expansion and contraction of the main rope 3 is detected by the detection device 9, the adjustment sheave 6 is automatically displaced by the sieve driving device 7, so that the labor for adjusting the length of the main rope 3 is greatly reduced. be able to.

Furthermore, since the adjustment sheave 6 is disposed on the opposite side of the drive sheave 1a and the deflector 2 with respect to the main cable 3, when the main cable 3 is extended, the adjustment sheave 6 is adjusted. 6 is displaced in a direction in which the winding angle of the main cable 3 around the drive sheave 1a increases, and the displacement of the adjustment sheave 6 causes the main cable 3 to be displaced from the drive sheave 1a. It is possible to prevent the traction force between them from decreasing. Embodiment 2

Next, FIG. 3 is a configuration diagram showing an elevator having a main rope elongation compensating device according to Embodiment 2 of the present invention. In the figure, the adjustment sheave 6 is mounted on the tip of a rotatable arm 11. The arm 11 is rotated around its base end by a sieve drive device 12. The adjustment sheave 6 is displaced by the rotation of the arm 11 c. Other configurations are the same as those in the first embodiment.

In such a main rope elongation compensating device, when the detecting device 9 detects the elongation of the main rope 3, the sheep driving device 12 is automatically driven in accordance with a signal from the detecting device 9, and the arm 11 is moved. Rotating in the counterclockwise direction in FIG. 1, the adjustment chip 6 is displaced downward in FIG. As a result, as shown by the two-dot chain line in FIG. 1, the length of the main cable 3 between the driving sheave 1a and the deflector wheel 2 is increased, and the amount of extension of the entire main cable 3 is absorbed. Then, when the positional relationship between the car 4 and the counterweight 5 returns to an appropriate state, the rotation of the arm 11 is automatically stopped.

Conversely, when the contraction of the main rope 3 is detected, the arm 11 is rotated clockwise in FIG. 1 and the adjustment sheave 6 is displaced upward in FIG.

The length of the main rope 3 between it and 2 becomes shorter, and the amount of shrinkage of the entire main rope 3 is absorbed. become.

Therefore, according to the main rope elongation compensator as described above, even if the main rope 3 made of a synthetic fiber rope expands and contracts, the positional relationship between the car 4 and the counterweight 5 is maintained in an appropriate state.

In the first and second embodiments, the adjustment sieve 6 is automatically displaced, but may be manually displaced using, for example, a ball screw or the like.

In addition to the expansion and contraction of the main rope 3 due to seasonal fluctuations, the elongation of the main rope 3 was detected even though the adjusting sheave 6 was maximally displaced due to the elongation of the main rope 3 over time. In such a case, an alarm may be issued to the control room or the like, and the maintenance and inspection work may be performed by the worker.

Further, in the first and second embodiments, the adjustment sheave 6 is arranged on the opposite side of the main sheave 3 from the drive sheave 1a and the deflector wheel 2. May be located on the same side of the main rope 3 as the drive sheave 1 a and the deflector 2. Embodiment 3.

Here, if the traction force between the drive ship 1a and the main rope 3 is too large, the balance weight 5 collides with a buffer (not shown) at the bottom of the hoistway due to some failure. However, the main rope 3 may not slip with respect to the drive sheave 1a, and the car 4 may be hoisted.

In order to avoid such a situation, it is necessary to keep the traction force between the drive sheave 1a and the main rope 3 below an allowable value. For this purpose, if the traction force is already close to the allowable value when the adjustment sheave 6 is in the initial position, the adjustment rope 6 is displaced to wind the main rope 3 onto the drive sheave 1a. It is not desirable that the angle be increased.

Therefore, in such a case, it is preferable to arrange the adjustment sheave 6 on the same side as the driving sheave 1a and the deflector 2 with respect to the main rope 3, as shown in FIG. 4, for example. . According to this configuration, when the adjustment chip 6 is displaced upward in the figure, the tractor is reduced, so that the allowable value is not exceeded.

In this case, even when the adjustment sheave 6 is displaced to the maximum, It is needless to say that the power is secured.

Claims

The scope of the claims

1. The main rope for suspending the car and the counterweight is made of synthetic fiber rope, and the elevator of the elevator installed on the drive sheave and the deflecting car of the drive unit is installed. A main rope elongation compensator,

The drive rope is disposed so as to be displaceable between the drive sheave and the deflecting wheel, and is in contact with the main rope, and is displaced by the displacement of the main rope between the drive sheave and the deflecting wheel. Elevator main line stretch compensator equipped with a rotatable adjustment sheep that changes the length.

2. The elevator according to claim 1, further comprising a guide device for guiding a linear displacement of the adjustment sheep, and a sieve driving device for sliding the adjustment sheave along the guide device. Overnight main rope elongation compensator.

3. The elevator according to claim 1, further comprising a rotatable arm on which the adjustment sheave is mounted, and a sheave driving device for displacing the adjustment sheave by rotating the arm. Overnight main rope elongation compensator.

4. The elevator according to claim 1, further comprising a detection device for detecting a change in the length of the main rope, wherein the adjustment ship is automatically displaced in accordance with information from the detection device. Main rope elongation compensator.

5. The main rope elongation compensating device according to claim 1, wherein the adjustment sheave is disposed on a side opposite to the drive sheave and the deflector with respect to the main rope.

6. The apparatus according to claim 1, wherein the adjustment sheave is disposed on the same side of the main rope as the drive ship and the deflector.