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Arrangement in an elevator without counterweight

A technology for elevators and elevator cars, which is used in elevators, transportation and packaging, elevators and other directions in buildings. It can solve the problems of rope groove wear and excessive tension, and achieve the effect of size optimization.

Inactive Publication Date: 2009-08-12
KONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since elevators are seldom driven at maximum load, the tension in the above solutions is often excessive
This leads to faster wear of e.g. the grooves of the traction ropes and sheaves

Method used

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  • Arrangement in an elevator without counterweight
  • Arrangement in an elevator without counterweight
  • Arrangement in an elevator without counterweight

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] figure 1 A simplified schematic side view of a typical traction sheave elevator is shown, in which an embodiment according to the invention is employed. The elevator is preferably an elevator equipped with a control device 5, wherein the elevator car 1, the traction rope system consisting of parallel traction ropes 2, and the traction machine 3 together with its traction sheave 4 are arranged in the elevator shaft among. The traction machine 3 with its traction sheave can also be located outside the hoistway. Due to the friction between the traction sheave 4 and the traction rope 2 , the elevator obtains its lifting force from the traction machine 3 .

[0017] shown in figure 1 In the roping solution among them, each hoisting rope 2 is fixed substantially immovably at its first end to a fixed point 7 in the upper part 8 of the elevator shaft. From their fixed point 7, the hoisting ropes 2 are led down past one or more deflection pulleys 10 on the elevator car 1, aft...

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PUM

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Abstract

The present invention relates to an arrangement in an elevator without counterweight, which comprises at least a control unit (5) , a hoisting machine (3) and a traction sheave (4) connected to it, and an elevator car (1) suspended on hoisting ropes (2) fixed to an essentially immovable place at their first ends and adjustably at their second ends, which elevator car (1) is fitted to travel backwards and forwards in an essentially vertical direction, and which elevator also comprises a tightening element (15) acting on the second end of the hoisting ropes (2) . An actively operating actuator (17, 21, 24, 29) is in connection with the tightening element (15) , which is fitted by means of feedback to keep the rope tension essentially at a predetermined level either by lightening or tightening the rope tension according to changes in the loading.

Description

technical field [0001] The invention relates to an arrangement in an elevator without counterweight as defined in the preamble of claim 1 . Background technique [0002] In a traction sheave elevator, the elevator car is moved by means of traction sheaves and traction ropes. It is also possible to use hoisting straps or other similar hoisting elements instead of the traction ropes. In the following, any mention of traction ropes refers to all hoisting elements suitable for this purpose. [0003] In order to move the elevator car to operate in the designed manner, there must be sufficient friction between the rope grooves of the traction sheave and the traction ropes, in which case the ropes do not slip on the traction sheave. One prior art solution is to use a moving counterweight which always moves simultaneously with the elevator car, but in the opposite direction. One issue when using counterweights is at least the hoistway space required for the counterweight, which t...

Claims

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Application Information

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IPC IPC(8): B66B7/10B66B11/00
CPCB66B7/10B66B11/008B66B11/007B66B7/06B66B11/08B66B11/00
Inventor 乔玛·马斯塔拉蒂埃斯科·奥兰科
Owner KONE CORP
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