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Tie-down compensation structure for an elevator system

A lifting system and a technology connected to it, applied in the field of lifting systems, can solve problems such as unresolved counterweight jumping, and achieve the effect of reducing the possibility of counterweight jumping

Inactive Publication Date: 2008-11-26
OTIS ELEVATOR CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use of chain or free cable compensating mechanisms in such buildings may result in unresolved counterweight runout

Method used

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  • Tie-down compensation structure for an elevator system
  • Tie-down compensation structure for an elevator system
  • Tie-down compensation structure for an elevator system

Examples

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Embodiment Construction

[0018] Figure 1 schematically shows an elevator system 20 comprising a cabin 22 supported on a frame 24 by conventional means. The counterweight 26 is provided with an associated frame 28 . Carriers 30, such as ropes or belts, support the weight of the cabin 22 and counterweight 26 in a conventional manner. Conventional attachment structures 32 secure appropriate portions of the carrier 30 to the bay frame 24 . Similarly, conventional attachment structures 34 secure appropriate portions of the carrier 30 to the counterweight frame 28 . The apparatus (not shown) includes at least one drive pulley for moving the carrier 30 so that the cabin and counterweight correspondingly move within the hoistway 36 to move the cabin 22 between the platforms of the building.

[0019] The illustrated embodiment includes a tension and compensation mechanism 40 . An elongated tension member 42 extends between the carrier bay 22 and the counterweight 26 . In one example, tensioning member 42 i...

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Abstract

An elevator system (20) includes a tie-down compensation arrangement (40). A tension member (42) extends between a cab (22) and counterweight (26) to provide a desired amount of tension on a load bearing rope or belt (30) that supports the cab and the counterweight. The tension member (42) in one example comprises a coated steel belt. At least one sheave (46) is supported on a base module (48) and remains stationary relative to a floor of a pit (52). A damper (50) is supported for movement with the counterweight (26) or the cab (22) to absorb energy that would otherwise tend to cause counterweight jump following a rapid descent and stop of the cab (22).

Description

technical field [0001] The present invention relates generally to elevator systems, and more particularly, the present invention relates to a specific mechanism for maintaining traction and control of an elevator system. Background technique [0002] There are many modern lift systems in existence. A common system includes a cabin and counterweight suspended by ropes or straps. The equipment is such that the ropes or straps are movable along at least one pulley to enable the desired movement of the cabin within the hoistway between the platforms. In a typical setup, when the cabin moves up, the counterweight moves down, and when the cabin moves down, the counterweight moves up. [0003] The weight of the counterweight and the carriage usually creates a stretch in the rope or strap that is sufficient to maintain the adhesion between the belt and the pulleys to allow the desired movement of the carriage. However, there is also a situation where it is necessary to provide a ...

Claims

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Application Information

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IPC IPC(8): B66B5/28B66B7/00B66B7/06
CPCB66B5/282B66B7/062
Inventor B·T·麦克纳马拉A·R·费特尔
Owner OTIS ELEVATOR CO
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