PROBLEM TO BE SOLVED: To provide a crane hydraulic circuit which can perform a composite operation of a main hoist or an auxiliary hoist winch and an undulation winch without pressure interference.SOLUTION: A hydraulic circuit is equipped with an auxiliary hoist winch which is driven by a pressure oil which is supplied from a first hydraulic pump via a first auxiliary hoist control valve and/or a pressure oil which is supplied from a second hydraulic pump via a second auxiliary hoist control valve. An undulation control valve and the first auxiliary hoist control valve are connected to the first hydraulic pump in series, and a main hoist control valve and the second auxiliary hoist control valve are connected to the second hydraulic pump in series. The hydraulic circuit is equipped with a selection unit which selects either a first state in which the auxiliary hoist winch is driven by only the pressure oil supplied from the first hydraulic pump via the first auxiliary hoist control valve, or a second state in which the auxiliary hoist winch is driven by only the pressure oil supplied from the second hydraulic pump via the second auxiliary hoist control valve.SELECTED DRAWING: Figure 3

    【課題】主巻または補巻ウインチと、起伏ウインチの複合操作を、圧力干渉無く実施可能なクレーンの油圧回路を提供する。【解決手段】油圧回路は、第1の油圧ポンプから第1の補巻用制御弁を介して供給される圧油、および/または、第2の油圧ポンプから第2の補巻用制御弁を介して供給される圧油で駆動される補巻用ウインチを備え、起伏用制御弁と第1の補巻用制御弁とは、第1の油圧ポンプに対してシリーズに接続され、主巻用制御弁と第2の補巻用制御弁とは、第2の油圧ポンプに対してシリーズに接続され、第1の油圧ポンプから第1の補巻用制御弁を介して供給される圧油のみで補巻用ウインチを駆動する第1状態と、第2の油圧ポンプから第2の補巻用制御弁を介して供給される圧油のみで補巻用ウインチを駆動する第2状態とのいずれか1つの状態を選択する選択装置を備える。【選択図】図3


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    Title :

    CRANE HYDRAULIC CIRCUIT


    Additional title:

    クレーンの油圧回路


    Contributors:

    Publication date :

    2016-06-02


    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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