To provide a one-cylinder expansion mechanism having excellent responsiveness even if it is based on an AOH system.SOLUTION: A hydraulic supply part 1 has: an air pressure source 20; an air pressure supply electromagnetic switch valve 21 that cuts off or connects air pressure from the air pressure source 20; an air pressure path 23 through which air is sent out from the air pressure supply electromagnetic switch valve 21 and which connects an expansion cylinder fixed side 22 and a movable side 4; a preload function electromagnetic switch valve 30 that cuts off or connects the air pressure from the air pressure path 23; and an air hydraulic conversion part 32 that converts the air pressure from the reload function electromagnetic switch valve 30 into hydraulic pressure, and supplies the hydraulic pressure to frist and second hydraulic cylinders. When the hydraulic pressure is supplied, the air pressure of the air pressure path 23 is pre-loaded by connecting the air pressure supply electromagnetic switch valve 21 in a state where the preload function electromagnetic switch valve 30 is cut off.SELECTED DRAWING: Figure 1

    【課題】 AOH式でありながらも応答性に優れた1本シリンダ伸縮機構を提供する。【解決手段】 油圧供給部1は、空圧源20と、前記空圧源20からの空圧を遮断又は連通する空圧供給用電磁切換弁21と、前記空圧供給用電磁切換弁21から空気が送出され、伸縮シリンダ固定側22と可動部4とを連絡する空圧路23と、前記空圧路23からの空圧を遮断又は連通する予圧機能用電磁切換弁30と、前記予圧機能用電磁切換弁30からの空圧を油圧に変換し、第1と第2の油圧シリンダに油圧を供給する空油圧変換部32と、を有する。油圧供給の際には、前記予圧機能用電磁切換弁30が遮断された状態で前記空圧供給用電磁切換弁21が連通されることで前記空圧路23の空圧が予圧される。【選択図】 図1


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    Titel :

    EXPANSION MECHANISM


    Weitere Titelangaben:

    伸縮機構


    Beteiligte:
    KAWANO TAKASHI (Autor:in)

    Erscheinungsdatum :

    2019-07-11


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B66C Krane , CRANES



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