Elevator apparatus including an anomalous acceleration detecting mechanism
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United States of America Patent
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Jan 17, 2017
Grant Date -
Oct 10, 2013
app pub date -
Apr 1, 2011
filing date -
Apr 1, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In an elevator apparatus, a car is suspended by a suspending device. A braking apparatus applies a braking force to the car by the suspending device. An excessive speed detection level that changes in response to car position is set in an excessive speed monitoring portion. The excessive speed monitoring portion makes the braking apparatus perform a braking operation when car speed reaches the excessive speed detection level. An anomalous acceleration detecting mechanism operates a safety device if acceleration that exceeds a preset set value arises in the car.
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