PROBLEM TO BE SOLVED: To reduce shock at the lift stop without wastefully rotating a pump.SOLUTION: A hand lifter comprises a hydraulic cylinder 21 to move up and down a lift, a hydraulic pump 23 to deliver working oil to the hydraulic cylinder 21 by the rotary drive of a pump motor 24, a pseudo-wave generator 25 to apply the pseudo-wave DC voltage to the pump motor 24 from a DC power source 26, a switch 28 to instruct the lifting or stopping of the lift and a control unit 27 to apply the pseudo-wave DC voltage which reduces the number of rotations, without reducing the torque of the pump motor 24 from the pseudo-wave generator 25 to the pump motor 24, when the lift stop is instructed by the switch 28.SELECTED DRAWING: Figure 2

    【課題】ポンプを無駄に回転させることなく、リフト停止時の衝撃を低減させる。【解決手段】 リフトを昇降させる油圧シリンダ21と、ポンプモータ24の回転駆動により作業油を油圧シリンダ21へ送液する油圧ポンプ23と、直流電源26からポンプモータ24へ、疑似波の直流電圧を印加させる疑似波発生器25と、リフトの昇降又は停止を指示するスイッチ28と、スイッチ28によりリフトの停止が指示された場合に、疑似波発生器25からポンプモータ24へポンプモータ24のトルクを低下させることなく回転数を低下させる疑似波の直流電圧を印加させる制御部27とを備える。【選択図】 図2


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    Title :

    HAND LIFTER


    Additional title:

    ハンドリフター


    Contributors:
    ONO MASAKI (author)

    Publication date :

    2018-10-25


    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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