Monitoring elevator traction rope
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United States of America Patent
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May 29, 2018
Issued Date -
N/A
app pub date -
Jul 29, 2015
filing date -
Feb 22, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A method and an arrangement are provided for monitoring the safety of a counterweighted elevator. In the method, an elevator car is driven with a hoisting machine towards the top end of the elevator hoistway, contact between the counterweight and the end buffer of the elevator hoistway is determined, a reference point for the location of the elevator car is registered when detecting contact between the counterweight and the end buffer, the distance that the elevator car travels onwards from the aforementioned reference point for the location is measured, and if the distance traveled by the elevator car onwards from the aforementioned reference point exceeds a threshold value a signal indicating a risk of slackening of the traction rope is formed.
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