PROBLEM TO BE SOLVED: To provide a screw jack capable of reducing labor when driving the screw jack, by reducing frictional force between an outer cylinder and an inner cylinder.SOLUTION: A cutting surface shape when cutting an inner cylinder 20 in the horizontal direction orthogonal to its longitudinal direction, is a circular shape of only an inner cylinder side stopper part 20b of a lower end part, and an inner cylinder side slide part 20c except for its inner cylinder side stopper part 20b, is in the shape of having a part recessed more than an outer peripheral surface of the inner cylinder side stopper part 20b in at least one place or more, and an outer cylinder 21 is in a cylindrical shape of having an inner diameter corresponding to a circular shape of the cutting surface shape of the inner cylinder side stopper part 20b so as to be storable when the inner cylinder 20 descends, and an outer cylinder side stopper part 21c having an inner shape crushed toward the inside in response to the shape of having the part recessed more than the outer peripheral surface of a stopper 16 part of the inner cylinder 20, is formed by at least one place or more of the inner cylinder side slide part 20c of the inner cylinder 20 of only its upper part.SELECTED DRAWING: Figure 2

    【課題】外筒と内筒との間の摩擦力が小さく、スクリュージャッキを駆動する際の労力を低減させることができるスクリュージャッキを提供すること。【解決手段】内筒20をその長手方向とは直交する水平方向に切断した際の切断面形状は、下端部の内筒側ストッパ部20bのみ円形であり、その内筒側ストッパ部20b以外の内筒側スライド部20cは少なくとも1箇所以上、内筒側ストッパ部20bの外周面より凹んだ部分を有する形状であり、外筒21は、内筒20が下降した際に収納できるよう内筒側ストッパ部20bの切断面形状の円形に応じた内径を有する円筒形状であって、その上部のみ内筒20の内筒側スライド部20cの少なくとも1箇所以上、内筒20のストッパ16部の外周面より凹んだ部分を有する形状に応じて内側に向かって潰した内形を有する外筒側ストッパ部21cを形成した。【選択図】図2


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    Titel :

    SCREW JACK


    Weitere Titelangaben:

    スクリュージャッキ


    Beteiligte:
    KAWASAKI KOJI (Autor:in)

    Erscheinungsdatum :

    2016-08-18


    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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