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device for reducing the displacement of an elevator car caused by load changes

An elevator car and load change technology, applied in the field of displacement devices, can solve the problems of starting the motor multiple times, uneconomical energy efficiency, falling, etc., and achieve the effects of achieving economies of scale, optimizing energy consumption, and good controllability

Active Publication Date: 2018-05-04
KONE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the elevator does not have a separate leveling function, this creates a height difference between the threshold of the elevator car and the threshold of the floor, which creates an accident risk, e.g. In this case, there is a greater risk of falling
On the other hand, if the elevator has a leveling function, the drive system of the motor that drives the elevator must start the motor multiple times every time the landing stops
This is uneconomical in terms of energy efficiency

Method used

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  • device for reducing the displacement of an elevator car caused by load changes
  • device for reducing the displacement of an elevator car caused by load changes
  • device for reducing the displacement of an elevator car caused by load changes

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Embodiment Construction

[0020] The displacement of the elevator car and the elongation of the elevator ropes supporting the elevator car caused by load changes, i.e., more precisely, by load changes of the elevator car, can be substantially achieved by using one or more (for example two ) counterweights and are substantially reduced by connecting the counterweights to each other at their bottom ends by means of rope elements or by means of corresponding flexible elements serving in part to support the load. Suspensions of this type, referring to closed systems, are stiffer than conventional suspensions, and expressly this enables smaller displacements to be induced by loads.

[0021] figure 1 A simplified and schematic side view of an elevator installation according to the invention is shown with a 1:1 suspension in which there are two traction machines 5 of the elevator arranged at or close to the top of the elevator shaft. The elevator car 1 and the two counterweights 4 used as compensating weight...

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Abstract

An arrangement for reducing the displacement of an elevator car caused by a change in loading includes at least an elevator car configured to move up and down in an elevator hoistway and one or more counterweights, and also at least one rope element above the elevator car and at least one rope element below the elevator car and at least one pretensioner of the rope elements. The elevator car and counterweight are configured to be supported and moved via the rope elements and the pretensioner and rope pulleys, of which rope pulleys the first part are diverting pulleys, and the second part are traction sheaves. The arrangement additionally includes at least two hoisting machines. In the arrangement is a mechanism configured to lock at least two rope pulleys to be non-rotating at least during loading of the elevator car.

Description

technical field [0001] The object of the invention is a device as defined in the preamble of claim 1 for reducing the displacement of the elevator car caused by load changes. Background technique [0002] A common elevator solution according to the prior art is the traction sheave elevator in which the traction machine is located on top of or above the elevator shaft. The slings and drag ropes (i.e., elevator ropes) of the elevator car are guided around the top of the traction sheave on the traction machine, and the elevator car is secured to a first end of the elevator rope and the counterweight is secured to the other end . In this way the elevator ropes are approximately the same size as the height of the elevator shaft or are somewhat longer. When loading the elevator car of this type of elevator according to the prior art, the car moves in the vertical direction due to elongation changes caused by stress changes occurring in the elevator ropes. [0003] If the elevat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B11/00
CPCB66B17/34B66B17/14B66B7/10B66B11/04
Inventor P·阿拉森蒂H·勒蒂南P·兰塔南
Owner KONE CORP
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