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    • 1. 发明申请
    • VALVE APPARATUS FOR PREVENTING FALL OF WORKING MACHINE
    • 用于防止工作机械的阀门装置
    • WO1996004431A1
    • 1996-02-15
    • PCT/JP1995001545
    • 1995-08-03
    • KOMATSU LTD.HORI, Shuji Oyama Factory of Kabushiki Kaisha Komatsu SeisakushoKARAKAMA, Tadao Oyama Factory of Kabushiki Kaisha Komatsu Seisakusho
    • KOMATSU LTD.
    • E02F09/22
    • E02F9/2267E02F9/2221E02F9/226E02F9/2271E02F9/2285F15B13/015Y10T137/87241
    • A valve apparatus for preventing a fall of a working machine comprises a cylinder-side passage (20) communicating with a cylinder port (19) opened in a cylinder-side mounting surface (11), a valve body (10) having a directional control valve-side passage (18) communicating with a directional control valve port (17), a check valve (24) provided in the valve body (10) and preventing the entry of a pressure oil from the cylinder-side passage (20) into the directional control valve-side passage (18), a flow rate control valve (34) provided in the valve body (10), normally shutting off the directional control valve-side passage (18) and cylinder-side passage (20) from each other, and establishing communication between these passages on receiving an external signal, and a safety valve (44) provided in the valve body (10) and adapted to relieve a high pressure in the cylinder-side passage (20). The check valve (24), flow rate control valve (34) and safety valve (44) are provided in a common plane substantially parallel to the cylinder-side mounting surface (11).
    • 一种用于防止工作机器坠落的阀装置包括与在气缸侧安装面(11)上开口的气缸端口(19)连通的气缸侧通路(20),具有方向控制 与方向控制阀口(17)连通的阀侧通道(18),设置在阀体(10)中的止回阀(24),并防止压力油从缸侧通道(20)进入 方向控制阀侧通道(18),设置在阀体(10)中的流量控制阀(34),通常切断方向控制阀侧通路(18)和气缸侧通路(20),从 并且在接收外部信号时建立这些通道之间的连通;以及安装在阀体(10)中的安全阀(44),其适于减轻气缸侧通道(20)中的高压。 止回阀(24),流量控制阀(34)和安全阀(44)设置在与汽缸侧安装面(11)大致平行的共同平面内。