To provide a crane capable of suppressing a reduction in operability when the weight of a suspended load is large.SOLUTION: The crane comprises a winch drive system having: an engine; a hydraulic pump that is driven by the engine; a hydraulic motor that is operated by hydraulic oil supplied from the hydraulic pump to drive a winch; a counter balance valve that is provided to a flow path for supplying/discharging the hydraulic oil to/from the hydraulic motor; and a control valve that is provided to the flow path for supplying/discharging the hydraulic oil to/from the hydraulic motor and the opening of which is changed in accordance with an operation amount of an operator. The crane has a control mechanism for adjusting the output of the winch drive system during winding-down in accordance with the speed of the winch with respect to the operation amount of the operator during winding-up.SELECTED DRAWING: Figure 1

    【課題】本発明は、吊り荷の重量が大きい場合の操作性の低下を抑制することができるクレーンを提供することを課題とする。【解決手段】本発明に係るクレーンは、エンジンと、このエンジンによって駆動される油圧ポンプと、この油圧ポンプから供給される作動油によって動作し、ウインチを駆動する油圧モーターと、この油圧モーターに作動油を供給及び排出する流路に設けられるカウンターバランス弁と、上記油圧モーターに作動油を供給及び排出する流路に設けられ、オペレーターの操作量に応じて開度が変更される制御弁とを有するウインチ駆動系を備えるクレーンであって、巻き上げ時の上記オペレーターの操作量に対する上記ウインチの速度に応じて巻き下げ時の上記ウインチ駆動系の出力を調節する制御機構を備えることを特徴とする。【選択図】図1


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    Title :

    CRANE AND CRANE CONTROL METHOD


    Additional title:

    クレーン及びクレーンの制御方法


    Contributors:

    Publication date :

    2020-03-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES / B66D Haspeln , CAPSTANS / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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