To provide a fail-safe mechanism of a jack device capable of preventing damage of the jack device even when an earthquake occurs during jack up.SOLUTION: A fail-safe mechanism of a jack device comprises a cylindrical part 3 provided on the outer periphery of a jack device 2 provided on a base isolation layer 11 and fixed to a lower skeleton 12 below the base isolation layer 11, and a bolt 5 bonded to the cylindrical part 3 via a spring part 4 that can extend the jack device 2 in the vertical direction. The cylindrical part 3 is brought into contact with an outer peripheral surface 211 of a cylinder part 21 (outer peripheral part of the jack device) at least at two different heights. The bolt 5 is preloaded with a tensile force corresponding to the vertical strength of the jack device 2.SELECTED DRAWING: Figure 2

    【課題】ジャッキアップ時に地震が発生した場合においてもジャッキ装置の損傷を防止できるジャッキ装置のフェイルセーフ機構を提供する。【解決手段】免震層11に設けられるジャッキ装置2の外周に設けられ、免震層11の下方の下部躯体12に固定される筒状部3と、ジャッキ装置2を上下方向に伸縮可能なバネ部4を介して筒状部3に接合するボルト5と、を有する。筒状部3は、少なくとも2つの異なる高さにおいてシリンダ部21の外周面211(ジャッキ装置の外周部)と接触する。ボルト5には、ジャッキ装置2の鉛直耐力に相当する引張力の予荷重が付与されている。【選択図】図2


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    Title :

    FAIL-SAFE MECHANISM OF JACK DEVICE


    Additional title:

    ジャッキ装置のフェイルセーフ機構


    Contributors:

    Publication date :

    2023-11-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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 / E04G SCAFFOLDING , Baugerüste / E04H Gebäude oder ähnliche Bauwerke für besondere Zwecke , BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES



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