PROBLEM TO BE SOLVED: To provide a mast device which can prevent a vehicle from being inclined or turned over during lift operation.SOLUTION: A mast device 1 comprises: a motor control unit 4 which performs an upward power control that lifts up a fork part 3 by normally rotating a motor M, a regenerative control that performs a regenerative operation of the motor M while lifting down the fork part 3, a downward power control that lifts down the fork part 3 by inversely rotating the motor M; a storage part 5 which stores a downward torque limit value that limits torque of the motor M so that a vehicle is not inclined by counteraction from an obstacle hindering downward actuation of the fork part 3, wherein the motor control unit 4 controls the motor M so that torque of the motor M does not exceed the downward torque limit value during the downward power control.

    【課題】リフト操作時に車両が傾いたり転倒したりするのを防ぐことができるマスト装置を提供する。【解決手段】マスト装置1であって、モータMを正回転させてフォーク部3を上昇させる上昇力行制御と、フォーク部3の下降時にモータMを回生動作させる回生制御と、モータMを逆回転させてフォーク部3を下降させる下降力行制御とを行うモータ制御部4と、フォーク部3の下降を妨げる障害物から受ける反作用により車両が傾かないようにモータMのトルクを制限する下降トルク制限値が格納された記憶部5と、を備え、モータ制御部4は、下降力行制御時に、モータMのトルクが下降トルク制限値を超えないようにモータMを制御することを特徴とする。【選択図】図3


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    Title :

    MAST DEVICE AND FORK LIFT TRUCK WITH THE SAME


    Additional title:

    マスト装置および当該装置を備えたフォークリフト


    Contributors:

    Publication date :

    2015-11-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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



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