Rope tension measuring apparatus for use with an elevator
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United States of America Patent
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Mar 24, 1998
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N/A
app pub date -
Nov 15, 1996
filing date -
Nov 17, 1995
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Abstract
A rope tension measuring apparatus for measuring rope tension of a plurality of main ropes that suspend an elevator car and a counterweight and adjustment quantities of tension adjusting springs for the main ropes. The apparatus comprises a portable measuring device comprising traveling-wave detector means directly attached to the elevator main rope for detecting a traveling wave that is generated by applying an instantaneous displacement to the main rope, traveling-wave passage velocity computing means for measuring the passage velocity of the traveling wave, rope tension computing means for computing the rope tension based on the passage velocity, spring adjustment quantity computing means for computing a spring adjustment quantity for the rope tension adjusting springs, and output means for outputting these computed results, based on the variation of passage velocities of the plurality of main ropes. The apparatus works excellently with a high-lift elevator with its sensor easy to mount, and performs tension adjustment efficiently.
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