PROBLEM TO BE SOLVED: To provide a jack capable of pressing up an object to be supported through a light operation without damaging the object to be supported and also setting a stroke thereof large, and enabling leveling adjustments to be easily and precisely made.SOLUTION: A jack is so constituted that a first elevation screw lever 3 in a barrel shape provided with an operation head 5 atop is threadably engaged with a male screw part 2 provided to a cylindrical body 1, and a second elevation screw lever 7 which has a smaller pitch than the first elevation screw lever 3 is threadably engaged with a female screw part 6 provided at a center part of the first elevation screw lever 3, and also configured to elevate a support head part 9 of an object to be supported, provided at an upper end of the second elevation screw lever 7, by a difference in pitch as the barrel part 5 is rotated.SELECTED DRAWING: Figure 2

    【課題】支持対象物を傷つけることなく軽快な操作でもって押し上げることができると共にそのストロークも大きく設定することができ、レベリング調整も簡単且つ精度よく行えるジャッキを提供する。【解決手段】筒状本体1に設けている雌ねじ部2に、上端に操作頭部5を設けている軸筒形状の第1昇降ねじ杆3を螺合させていると共に、この第1昇降ねじ杆3の中心部に設けている雌ねじ部6に、第1昇降ねじ杆3よりもピッチが小さい第2昇降ねじ杆7を螺合させてなり、操作頭部5を回転操作することによって第2昇降ねじ杆7の上端に設けている支持対象物の支持頭部9を上記ピッチの差だけ昇降させるように構成している。【選択図】図2


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    Titel :

    JACK


    Weitere Titelangaben:

    ジャッキ


    Beteiligte:

    Erscheinungsdatum :

    23.09.2016


    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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