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Safety device

A technology of safety equipment and safety ropes, applied in the directions of seat belts, life-saving equipment, hoisting devices, etc., can solve the problems of not being replaced, dangerous continued use, safety pulleys not showing anti-fall events, etc., to achieve the frequency of inspection and adjustment Low, easy-to-setup effects

Inactive Publication Date: 2008-12-03
LATCHWAYS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the known safety pulleys themselves do not show that a fall arrest event has occurred, so safety pulleys or other components of safety systems that have been subjected to fall arrest loads may not be tested or used if the user himself does not report a fall. replaced while being dangerously continued to use

Method used

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Examples

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no. 1 example

[0059] Similar to the first embodiment, an end stopper 31f is provided as a safety precaution.

[0060] Preferably, the deformation means 31c is formed of plastic.

[0061] The linear energy absorber 31 of the third embodiment has the advantage of being particularly compact and mechanically simple.

[0062] In all embodiments of the present invention, it is generally preferred to use a constant force type linear energy absorber having a substantially constant deployment load required to sustain deployment of the energy absorber throughout its range of deployment. That is, in the illustrated embodiments, the unwinding load required to unroll the stainless steel strip from the coil store through the deforming device is constant along the entire length of the stainless steel strip. Because if such a linear energy absorber is provided, this constant deployed load is the maximum load that can be safely applied to the user during a fall arrest event and maximizes the amount of energy...

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Abstract

A safety device for a fall arrest system comprises a body 10 having a drum 11 around which is wound a safety line 13 connected to the harness of a user. The drum 11 is mounted for rotation on a yoke 12, a speed-responsive brake locking the drum in the paying out direction if the drum rotates above a threshold speed. A linear energy absorber 15 connects the body 10 to a mounting eye 14 which attaches the device to a support structure. When the drum 11 becomes locked the energy absorber responds to an applied load greater than a threshold. It may comprise a stainless steel strip 15a which absorbs energy as it passes through deforming means 15c in uncoiling. In an alternative construction the energy absorber can comprise layers of stitched fabric. A further energy absorber can be provided in the connection of the line 13 to the safety harness of the user.

Description

technical field [0001] The present invention relates to an improved safety device, and in particular to an improved safety device for use in a fall arrest system. Background technique [0002] Fall arrest systems are used to prevent injury or death caused by falls of persons working at heights. Fall arrest systems are also commonly referred to as height safety systems or fall arrest systems. [0003] A common fall arrest system uses a safety block 1 as shown in FIG. 1 . The safety pulley 1 comprises a safety line or cable 2 wound on a drum 3 mounted for rotation inside a housing 4 . The housing 4 comprises coupling means 5 for coupling the safety pulley to a fixed support structure (not shown). The drum 3 is biased in the direction of rotation by a tensioning and re-spooling device 6 for tensioning the safety line 2 and wrapping the safety line on the drum 3 . Optionally, the drum 3 is connected to the brake 8 via a speed sensitive clutch 9 arranged to allow free rotatio...

Claims

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Application Information

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IPC IPC(8): A62B35/04A62B1/08
CPCA62B1/08A62B35/0093B66D5/00
Inventor 卡尔·琼斯
Owner LATCHWAYS LTD
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