PROBLEM TO BE SOLVED: To provide an expansion/contraction control device capable of continuing expansion/contraction action without invalidating a lift stop function, when a temporal abnormal value is detected in the expansion/contraction amount of an expansion/contraction member.SOLUTION: An expansion/contraction control device 100 is equipped with first-forth stroke sensors 61, 62, 63, and 64 which respectively detect the expansion/contraction amount of a plurality of expansion/contraction members; a computing device 7 which calculates the difference of each expansion/contraction amount; and a controller 9. The controller 9 detects that at least one of each detected expansion/contraction amount is an abnormal value, determines whether the detected abnormal value is temporal or permanent, specifies the expansion/contraction amount indicating the temporal abnormal value, and rewrites the temporal abnormal value to a temporal normal value capable of continuing the expansion/contraction action of each expansion/contraction member, so as to restart the expansion/contraction action of each expansion/contraction action stopped due to the detection of the abnormal value.SELECTED DRAWING: Figure 2
【課題】伸縮部材の伸縮量に一時的な異常値が検出された場合に、リフト停止機能を無効にすることなく伸縮動作を継続することができる伸縮制御装置を提供すること。【解決手段】伸縮制御装置100は、複数の伸縮部材の伸縮量をそれぞれ検出する第1〜第4ストロークセンサ61、62、63及び64と、各伸縮量の差分を算出する演算装置7と、コントローラ9とを備え、コントローラ9は、検出された各伸縮量の少なくとも一つが異常値であると検出し、検出された異常値が一時的か恒久的かを判別し、一時的な異常値を示す伸縮量を特定し、異常値の検出によって停止した各伸縮部材の伸縮動作を再開するために、一時的な異常値を、各伸縮部材の伸縮動作を継続可能な仮の正常値に上書きする。【選択図】図2
EXPANSION/CONTRACTION CONTROL DEVICE AND EXPANSION/CONTRACTION CONTROL METHOD
伸縮制御装置及び伸縮制御方法
2016-05-23
Patent
Elektronische Ressource
Japanisch
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
Europäisches Patentamt | 2016
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