Device for detecting the replacement state of wear of a high-strength fiber rope during use in lifting gear
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United States of America Patent
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Jan 23, 2018
Grant Date -
Aug 4, 2016
app pub date -
Aug 14, 2014
filing date -
Aug 28, 2013
priority date (Note) -
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Abstract
The present invention relates generally to hoists such as cranes which instead of steel wire ropes use high-strength fiber ropes. The invention relates in particular to an arrangement for detecting the discard state of a high-strength fiber rope when used on such hoists, with a means for detecting at least one rope parameter and an evaluation unit for evaluating the rope parameter, and providing a discard signal depending upon the evaluation of the rope parameters. According to the invention, the detection means comprises torsional stiffness detection means to determine the torsional stiffness of the rope, whereby the evaluation unit provides the discard signal depending on the determined torsional stiffness of the rope.
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