PROBLEM TO BE SOLVED: To prevent irregular winding from occurring in a wire rope in a rapid lowering operation of a suspended load without excessively restricting suspended load lowering speed.SOLUTION: A controller 12 calculates torque according to the tensile force of a wire rope 2 from a current value measured by a galvanometer 18 when a rapid lowering operation in which a time change rate of an operation amount is a predetermined reference change rate or more is input in an operation lever 13, and executes torque control to cause an electric motor 8 to perform lowering drive so that the calculated torque becomes predetermined reference torque or more. An inverter 9 drives the electric motor 8 according to a control signal input from the controller 12.SELECTED DRAWING: Figure 1

    【課題】吊荷の巻下速度を過剰に制限することなく、吊荷の急速巻下操作時にワイヤーロープで発生する乱巻を防止する。【解決手段】コントローラ12は、操作量の時間変化率が所定の基準変化率以上の急速巻下操作が操作レバー13に入力されたとき、電流計18が計測した電流値からワイヤーロープ2の張力に応じたトルクを算出し、算出したトルクが所定の基準トルク以上になるように、電動モータ8を巻下駆動させるトルク制御を実行する。インバータ9は、コントローラ12から入力される制御信号にしたがって電動モータ8を駆動させる。【選択図】図1


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    Title :

    ELECTRICALLY-DRIVEN WINCH DEVICE


    Additional title:

    電動ウインチ装置


    Contributors:

    Publication date :

    2017-12-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66D Haspeln , CAPSTANS / B66C Krane , CRANES



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