To provide a hoist capable of preventing damaging of the hoist caused by a continued winding operation of the hoist in an overload state and performing a safe operation.SOLUTION: This hoist is provided with: a motor for winding/unwinding a suspended load; control means for controlling the motor; and overload determination means for storing a first predetermined position in storage means in advance and identifying an overload state during the winding operation, and characterized in that when the overload state is identified, the winding operation is prohibited, and the unwinding operation is carried out up to the first predetermined position.SELECTED DRAWING: Figure 5
【課題】過負荷状態で巻上機が巻上動作し続けることによる巻上機の破損を防止し、安全な操作が可能となる巻上機を提供する。【解決手段】吊荷を巻上げ動作または巻下げ動作を行う電動機と、電動機を制御する制御手段とを有する巻上機であって、予め記憶手段に第一の所定位置を記憶し、巻上げ動作中の過負荷状態を特定する過負荷判定手段と、過負荷状態と特定された場合に、巻上げ動作を禁止し、第一の所定位置まで巻下げ動作を行うことを特徴とする巻上機を提供する。【選択図】 図5
HOIST AND HOIST OVERLOAD DETECTION METHOD
巻上機及び巻上機の過負荷検出方法
2019-01-24
Patent
Electronic Resource
Japanese
IPC: | B66D Haspeln , CAPSTANS |