FI94854B - Compensation-cable arrangement - Google Patents

Abstract

The lift car (29) in a high rise elevator installation has a suspension rope (11) which passes over a diverting pulley (15) through a traction sheave (5) to the counterweight (3). A set of compensating ropes (4) are passed round a car sheave (14) through a tensioning device (6, 12) and over a counterweight pulley (7) to a tension weight (8). The tension weight can move vertically as the suspension and compensating ropes are elongated. In addition, a buffer with adjustment provision is located below the counterweight.

Description

94854

COMPONENT ROPE ARRANGEMENT

The present invention relates to a compensation rope arrangement in an elevator according to the preamble of claim 1.

In high elevators, compensating ropes are needed to balance the unbalance torque caused by the hoisting ropes that occurs when the car moves. If this were not done, the engine size would be 10 much larger and the phenomenon would worsen in height. If the height in the shaft increases large enough without rope compensation, a situation arises where there is not enough friction. In high elevators, compensation ropes are used, which are tightened by means of a compensation clamping weight.

15

Elevators run at high speeds in tall houses, and in the event of disturbances (driving on bumpers and grabbing), both the car and the counterweight can jump quite long distances before the kinetic energy is exhausted. The result is a severe blow to 20 ropes that can cause damage to elevator structures or, people. For this reason, the compensating tensioning devices in high-speed elevators are equipped with a hypnotic device. This anti-skid device also reduces the need for the upper space of the elevator shaft because not so much jump space is needed.

25

Often in high-rise houses, where the suspension ratio of the suspension ropes: for the body and the counterweight is 2: 1, a lot of compensation or leveling ropes are needed, as well as a very heavy tightening weight. Sometimes this need for compensation is so great that it is not possible to fully compensate for the torque caused by the suspension ropes, resulting in an increase in motor size.

• «.. DE 1251926 discloses a solution in which the trajectory of the counterweight is halved and the counterweight is placed in the lower part of the shaft 35. In FI patent 82823, the trajectory of the counterweight is halved and placed in the upper part of the shaft, respectively. Unfortunately, there is currently no compensation for these. These solutions have therefore had to use large motors and the height is also limited due to friction.

2 94854 The object of the present invention is to provide a solution in which the required number of rope compensations is always used, whereby the torque required by the motor is minimal. Insufficient compensation, i.e. a situation where the engine torque increases when the required amount of compensation is not used, is no longer necessary in high houses where the body and counterweight are suspended 2: 1. This is achieved by using, among other things, 2: 1 suspension for compensation on the body and counterweight side instead of the current 1: 1 10 compensation ratio. This halves the number of ropes required and also reduces the weight of the compensation tensioner. This suspension ratio can be further increased, thereby reducing the number of compensating ropes and the weight of the compensating tensioning device.

The present invention provides a compensation solution for elevators in which the movement of the counterweight is halved. This is achieved in such a way that the suspension ropes at the end of the car side and the compensation ropes are suspended in a ratio of 1: 1 and, respectively, on the counterweight 20 side, both are suspended in a ratio of 2: 1. The number of compensation ropes can be reduced so that the compensation suspension ratios on the car and counterweight side are the ratios of the elevator suspension ropes multiplied by a factor. For example, so that the suspension ratio of the suspension ropes on the car side is 1: 1 and on the counterweight 25 side 2: 1 and the suspension ropes on the car side are 2: 1 and on the counter side 4: 1, and these compensation suspension ratios are 3: 1 on the car side and 6: 1 on the counterweight side, etc. 1 2 3 4 5 6

In all the above cases, the mutual suspension ratio of the suspension ropes and the 2 compensating ropes is the same or multiplied by a constant relative to each other, however, so that the suspension ratio of the car and the 4 counterweights may be different. As an example, the case where the suspension ratio 6 of the car suspension ropes 6 is 1: 1 and the suspension ratio of the counterweight suspension ropes is 2: 1, compensation can now be used whose compensation on the car and counterweight side is obtained by multiplying the car and counterweight rope suspension ratios 348. for example, n = 3, a compensation suspension ratio of 3: 1 is obtained on the car side in the above cases and a counterweight compensation ratio of 6: 1 is obtained. Known cases are situations where the ratio of the suspension ropes of the car to the counterweight is 5: 1 and the ratio of the suspension ropes is 1: 1, respectively. Another known case is where the suspension ratio of the car to the counterweight is 2: 1 and the suspension ratio of the compensation ropes is 1: 1, respectively. The present invention does not relate to these known ways.

10

The object is realized by the invention, which is characterized in that the suspension ratio of the compensating ropes is the same or multiplied by a constant as the suspension ratio of the suspension ropes and the suspension ratio of the suspension ropes is different on the car side and the counterweight side; or the suspension ratio of the 15 compensating ropes is a suspension ratio of the suspension ropes multiplied by a constant> 1 and the suspension ratio of the suspension ropes is the same on the car side and the counterweight side.

A preferred embodiment of the invention is characterized in that the rope suspension and compensation suspension ratio for elevators is 1: 1 on the elevator car side and the rope suspension and compensation suspension ratio is 2: 1 on the counterweight side, respectively.

Yet another preferred embodiment is characterized in that the lower compensating deflection wheels are fixedly mounted, so that they do not move vertically, and that the compensating ropes are tensioned by a separate tensioning weight located at one end of the compensating rope and able to move vertically as the ropes stretch.

30

Another preferred embodiment is characterized in that the compensation rope passing through the counterweight deflection pulley is attached to the bottom or wall of the elevator shaft and the compensation deflection wheels are attached to a tensioning device 35 which is able to move vertically.

. The invention achieves considerable advantages: - In high 2: 1 suspended goods elevators, a large number of 4,94854 compensating ropes and a heavy clamping weight are required. With the double compensation suspension ratio according to the invention, it is possible to halve the number of ropes and reduce the tightening weight.

5 - Thanks to the invention, the structure according to FI patent 82823 and DE publication 1251926 can be used in very tall houses, whereby the savings in the length and fastenings of the counterweight guide are considerable when the counterweight travels only 10 half of the car's distance.

- The solution for locking the device to prevent the counterweight can be used in the solution according to the invention.

In the following, the invention will be described in more detail by way of example with reference to the accompanying drawings, in which

Fig. 1 shows a solution according to alternative I of the invention and Fig. 2 shows a solution according to alternative II of the invention, and Fig. 3 shows a solution according to alternative III of the invention.

Figure 1 shows an elevator (1) with an elevator car (2) and a counterweight (3) and an elevator suspension rope (11) on which the elevator car (2) and the counterweight (3) are suspended, and a traction sheave (5) and a deflection wheel. (15), the movement of which is transmitted via suspension ropes (11) to the elevator car (2) and the counterweight (3). The elevator skid (2) is suspended with a suspension ratio of 1: 1 and the counterweight (3) is suspended with a suspension ratio of 2: 1. In this solution, the compensating ropes (4) pass from the basket (2) to the floor-mounted folding wheels (6) 30 and further through the folding wheel (7) located in the counterweight (3) to the tensioning direction (8) attached to the rope end, which can; as the ropes (4 and 11) stretch, move vertically. In the present invention, the suspension ratio of the compensation ropes is the same as the suspension ratio of the suspension ropes, i.e. 1: 1, on the car side and 2: 1 on the counterweight 35 side, so that in this case their mutual coefficient is 1.

Fig. 2 shows another alternative in which the suspension ratio of the suspension ropes of the elevator car (2) 5 94854 and the counterweight (3) is the same as in Fig. 1. The compensation rope (4) is attached to the lower part of the elevator car (2) and passes on the folding wheels 6) via a deflection wheel (7) located below the counterweight (3) to a rope attachment placed on the bottom (13) of the elevator shaft or on the wall. The tensioning device (12) is able to move vertically as the ropes (4 and 11) are stretched. In this solution, the suspension ratio of the compensation ropes is the same as the suspension ratio of the suspension ropes in Fig. 1, so that the mutual coefficient of the suspension ratios-10 is also 1.

In Fig. 3, the basket (2) and the counterweight (3) are suspended by suspension ropes (11) and both with a suspension ratio of 1: 1. The compensation rope (4) is attached to the bottom of the shaft (13) at both of its 15 ends. The compensation rope (4) is tightened via the deflection pulleys (7 and 14) by means of a tensioning device (12) with deflection pulleys (6). The clamping device (12) can move vertically. To the solution according to Fig. 3, the tightening head shown in Fig. 1 can also be added by means of a tightening weight (8) and fixed folding wheels (6). In this case, the suspension ratio of the suspension ropes is 1: 1 and the suspension ratio of the compensation ropes is 2: 2, so the mutual coefficient of the suspension ratio is 2.

It will be clear to a person skilled in the art that the various embodiments of the invention are not limited exclusively to the examples given above, but may vary within the scope of the claims set out below. Instead of compensating ropes, belts, chains, etc. can be used. The clamping weight (8) in Fig. 1 can be hung on the wall 30 or on the bottom of the shaft (13) via an additional deflection wheel. There may be one or more folding wheels (6), as well as more than one folding wheels (7).

φ

There may also be several folding wheels (14) in the body (2). The position of the drive wheel (5) and the deflection wheel (15) can be interchanged. It is also clear to a person skilled in the art that a basket frame can also be used instead of a basket word, and also a counterweight frame or a counterweight tank instead of a counterweight.

Claims (4)

94854 A compensating rope arrangement in an elevator comprising 5 elevator cars (2) and a counterweight (3) and an elevator suspension rope (11) on which the elevator car (2) and the counterweight (3) are suspended, and a traction sheave (5) whose movement is transmitted by the suspension rope ( 11) through the elevator car (2) and the counterweight (3) as well as the compensation rope (4) and at least one deflection wheel (15) belonging to the suspension rope (li), characterized in that: - the suspension ratio of the compensation ropes (4) is the same or multiplied by a constant the suspension ratio of the suspension ropes (11) and the suspension ratio of the suspension ropes (11) are different on the side of the car (2) and the counterweight (3); or 15. the suspension ratio of the compensating ropes (4) is a suspension ratio of the suspension ropes (11) multiplied by a constant> 1 and the suspension ratio of the suspension ropes (11) is the same on the car side and the counterweight side. Compensation arrangement 20 in an elevator according to claim 1, characterized in that the suspension rope and compensation suspension ratio on the elevator car (2) side is 1: 1 and the suspension rope and compensation suspension ratio on the counterweight (3) side is 2: 1, respectively. 1 2 3 4 5 6 7 8 9 10 11 Compensation arrangement 2 in an elevator according to claim 2, characterized in that the lower compensation deflection wheels (6) are fixedly mounted, so that they do not move vertically, and that the compensation ropes (4) 5 are tightened by a separate tightening weight (8). is located at one end of the compensation rope (4) and is able to move 7 vertically as the ropes stretch. 8 «9 Compensation arrangement in an elevator according to one of the preceding claims, characterized in that the compensation rope (4) passing through the deflection wheel (7) in the counterweight (3) is attached to the bottom (13) or wall of the elevator shaft and the compensation deflection wheels (6) are attached to a clamping device (12) capable of moving vertically. 94854