Elevator operation control device
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United States of America Patent
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-
Aug 31, 2010
Grant Date -
May 7, 2009
app pub date -
Mar 1, 2006
filing date -
Mar 1, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a control operation performed at time of an earthquake or strong wind, when a running elevator is stopped at a nearest floor, the natural frequency of the transverse vibration of a rope is prevented from resonating with the natural frequency of the building, and thereby an increase in transverse vibration of the rope is restrained. In the control operation, when a shake of the building caused by earthquake or strong wind is detected, a running elevator is stopped at the nearest floor, or an elevator passing through an express zone is stopped emergently and runs at a low speed to the nearest floor, the natural frequency of the transverse vibration of the rope is compared with the natural frequency of the building, and the car stop position is selected at a non-resonance position to prevent the natural frequency of the transverse vibration of the rope from resonating with the natural frequency of the building.
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