PROBLEM TO BE SOLVED: To perform confirmation of whether a fall prevention valve operates normally or not comparatively easily, even when additionally providing the fall prevention valve to an existing hydraulic elevator.SOLUTION: An operation confirmation method of a fall prevention valve is for a hydraulic elevator including: a fall prevention valve 8 having a check valve position 8a, and for stopping an actuation of a hydraulic jack 2 at abnormal operation time of a main control valve 7; and a valve 9 for power failure time landing device having a flow control valve position 9b, switched to the flow control valve position 9b at power failure time, and for performing control of descending a car 1 to the nearest floor. In the operation confirmation of the fall prevention valve 8, the fall prevention valve 8 is switched and controlled to the check valve position 8a at which the actuation of the hydraulic jack 2 is stopped, and by presence/absence of descent of the car 1 when the valve 9 for power failure time landing device is switched and controlled to the flow control valve position 9b in this state, it is confirmed whether the fall prevention valve 8 normally operates or not.
【課題】既設の油圧式エレベータに落下防止弁を追加して設ける場合であっても、落下防止弁が正常に動作するか否かの確認を比較的容易に行うことができるようにする。【解決手段】本発明に係る落下防止弁の動作確認方法は、逆止弁位置8aを有し、主制御弁7の異常動作時に油圧ジャッキ2の作動を停止させる落下防止弁8と、流量制御弁位置9bを有し、停電時に流量制御弁位置9bに切り換えられ、乗かご1を最寄り階まで下降させる制御を行う停電時着床装置用弁9とを備えた油圧式エレベータにあって、落下防止弁8の動作確認に際しては、落下防止弁8を、油圧ジャッキ2の作動を停止させる逆止弁位置8aに切り換え制御し、この状態で停電時着床装置用弁9を流量制御弁位置9bに切り換え制御したときの乗かご1の下降の有無により、落下防止弁8が正常に動作するか否かを確認するようにした。【選択図】図1
OPERATION CONFIRMATION METHOD OF FALL PREVENTION VALVE OF HYDRAULIC TYPE ELEVATOR, AND OPERATION CONFIRMATION DEVICE
油圧式エレベータの落下防止弁の動作確認方法、及び動作確認装置
2016-01-12
Patent
Electronic Resource
Japanese
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