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Device for preventing uncontrolled acceleration of an elevator car installed in an elevator installation

A non-control, braking device technology, used in transportation and packaging, elevators, clothing, etc., can solve problems such as increased release force, incompatibility, etc.

Inactive Publication Date: 2005-01-12
INVENTIO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this compensating spring would additionally increase the already excessive release force in the downward direction and is therefore unsuitable

Method used

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  • Device for preventing uncontrolled acceleration of an elevator car installed in an elevator installation
  • Device for preventing uncontrolled acceleration of an elevator car installed in an elevator installation
  • Device for preventing uncontrolled acceleration of an elevator car installed in an elevator installation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] FIG. 1 is a general view of a device according to the invention for preventing uncontrolled acceleration of a car of an elevator installation.

[0038]Only the carrier frame 2 is shown for the car 1 in the figure. The carrier frame 2 of the car 1 is guided along a vertical travel path on upper guides 3 and lower guides 4 on guide rails 5 indicated by dashed lines. The car 1 is suspended from a halyard, not shown, which is deflected at the upper end of the elevator shaft via a drive pulley and connected to a counterweight. The elevator car is driven via the driving wheels. Usually the counterweight is designed so that balance is achieved when the car 1 is loaded with about half of its maximum rated load. In the event of a malfunction, in particular a failure of the drive, the car 1 will be accelerated uncontrollably due to the weight difference between the car 1 and the counterweight. When the car 1 is loaded with less than half of its rated load, it accelerates in th...

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PUM

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Abstract

The invention relates to a device for preventing uncontrolled acceleration of an elevator car (1) installed in an elevator installation. The inventive device comprises a limiting cable (18) which is guided over rollers (19, 20) in a direction of movement of the elevator car (1). A braking device (6) joined to the elevator car (1) is connected to the limiting cable (18) via a release (7) and brakes the elevator car (1) in both a downward and upward direction when the limiting cable (18) transmits a predetermined release force to the release (7). A speed limiter (27) is connected to one of the rollers (19) and stops the roller (19) when the traveling speed of the elevator car (1) exceeds a predetermined limiting speed either in a downward or upward direction. According to the invention, the release (7) of the braking device (6) is connected via a slide connection (30) to the limiting cable (18) for limiting the force transmitted to the release (7) so that the limiting cable (18) slides through on said slide connection (30) when a force which is significantly larger than the release force required for releasing the braking device (6) is transmitted from the limiting cable (18) to the release (7) of the braking device (6).

Description

technical field [0001] The invention relates to a device for preventing uncontrolled acceleration of a car of an elevator installation, whether upward or downward. Background technique [0002] In elevator installations, the car is usually connected to the counterweight via a load-carrying cable and a driving pulley for driving. In order to ensure that in the event of a malfunction, for example in the event of a drive failure, the car cannot be accelerated uncontrollably due to the weight difference between the car and the counterweight, a corresponding safety device is provided. Since the counterweight is usually designed to balance at half the rated payload of the elevator car, uncontrolled acceleration in the downward and upward directions occurs depending on whether the rated payload exceeds or falls below one-half, respectively. Therefore, the safety device will act no matter there is a non-controlled acceleration of downlink or uplink. [0003] In EP 0 440 839 A1, a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B5/04
CPCB66B5/04Y10T24/3958Y10T24/3978B66B5/18
Inventor 弗朗茨·瓦茨克哈特穆特·利比希
Owner INVENTIO AG