To provide a rotation operation handle for a screw type jack device for furniture lifting which can accurately press furniture to be fixed to a ceiling surface without excess and deficiency.SOLUTION: A rotation operation handle includes a socket (54) which is rotatably inserted and held at a base end part of a handle body (47) around a vertical axis (O-O). A steel ball (56) stored in the middle section of the handle body is engaged with a ball-receiving recessed groove (55) formed correspondingly on an outer peripheral surface of the socket in an elastically biased state in which the handle body may rotate integrally with the socket, a load more excessive than the elastically biasing force of the steel ball acts on the socket during the rotation operation of a rotation operation shaft by the handle body in which the socket is inserted to and fit to the rotation operation shaft (30) vertical to a screw type jack device, and only the handle body idles.SELECTED DRAWING: Figure 18

    【課題】家具を天井面へ過不足なく、自ずと正確に押し付け固定できる家具昇降用ネジ式ジャッキ装置の回転操作ハンドルを提供する。【解決手段】ハンドル本体(47)の基端部へ垂直軸線(O-O)周りの回転自在に差し込み保持されたソケット(54)を備え、そのハンドル本体の中途部に収納されたスチールボール(56)を、上記ソケットの外周面に対応形成されたボール受け入れ凹溝(55)へ、上記ハンドル本体がソケットと一体回転し得る弾圧付勢状態に係合させて、上記ソケットをネジ式ジャッキ装置の垂直な回転操作軸(30)へ差し込み套嵌させたハンドル本体により、その回転操作軸の回転操作中において、上記ソケットにスチールボールの弾圧付勢力よりも過大な負荷が作用したならば、そのハンドル本体だけが空廻りするように設定した。【選択図】図18


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    Title :

    ROTATION OPERATION HANDLE FOR SCREW TYPE JACK DEVICE FOR FURNITURE LIFTING


    Additional title:

    家具昇降用ネジ式ジャッキ装置の回転操作ハンドル


    Contributors:

    Publication date :

    2025-01-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    A47B Tische , TABLES / 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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