To provide an expansion device that can smoothly expand three or more cylindrical members without using pneumatic pressure and hydraulic pressure.SOLUTION: An expansion device 10 comprises: first to third cylindrical members 1-3 that are assembled in a nesting manner; screw shafts 11 and 12 that ere rotatably supported on the first cylindrical member 1 and the second cylindrical member 2 respectively; nuts 32 and 33 that are attached to the second cylindrical member 2 and the third cylindrical member 3 respectively and are screwed to the screw shafts 11 and 12 of the first cylindrical member 1 and the second cylindrical member 2; and a transmission device 22 that transmits rotation of the screw shaft 11 of the first cylindrical member 1 to the screw shaft 12 of the second cylindrical member 2 and can move in an axial direction with respect to the screw shaft 11 of the first cylindrical member 1. Simultaneous rotation of the screw shaft 11 of the first cylindrical member 1 and the screw shaft 12 of the second cylindrical member 2 enables the first to third cylindrical members 1-3 to expand.SELECTED DRAWING: Figure 2

    【課題】空圧や油圧を使用せずに3以上の筒部材を円滑に伸縮させることができる伸縮装置を提供する。【解決手段】伸縮装置10は、入れ子式に組み合わされる第1ないし第3筒部材1~3と、第1筒部材1及び第2筒部材2それぞれに回転可能に支持されるねじ軸11,12と、第2筒部材2及び第3筒部材3それぞれに取り付けられ、第1筒部材1及び第2筒部材2のねじ軸11,12に螺合するナット32,33と、第1筒部材1のねじ軸11の回転を第2筒部材2のねじ軸12に伝達し、第1筒部材1のねじ軸11に対して軸方向に移動可能な伝達装置22と、を備える。第1筒部材1のねじ軸11と第2筒部材2のねじ軸12が同時に回転することにより、第1ないし第3筒部材1~3が伸縮する。【選択図】図2


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    Titel :

    EXPANSION DEVICE


    Weitere Titelangaben:

    伸縮装置


    Beteiligte:

    Erscheinungsdatum :

    25.04.2022


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    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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