To provide a fall prevention device which is high in versatility, can stop a lift body immediately after a fall, or can descend it at a mild speed, a lift, a welding system, and a fall prevention method.SOLUTION: In a fall prevention device for preventing a fall of a lift body in a lift for ascending and descending the lift body, the lift body comprises a rotating shaft which rotates accompanied with the ascent/descent of the lift body, the fall prevention device comprises a hydraulic circuit part connected to the rotating shaft, the hydraulic circuit part comprises a liquid motor connected to the rotating shaft, and a storage part connected to the liquid motor via a flow passage and storing liquid, and at least either of a direction control valve and a flow rate control valve is arranged at a single or a plurality of flow passages for connecting at least one outlet/inlet port of the liquid motor and an outlet/inlet port of the storage part.SELECTED DRAWING: Figure 3

    【課題】汎用性が高く、落下直後に昇降体を停止させることができ又は緩やかな速度で降下させることができる、落下防止装置、昇降機、溶接システム、及び落下防止方法を提供する。【解決手段】昇降体を昇降させる昇降機において、昇降体の落下を防止する落下防止装置であって、昇降機は、昇降体の昇降にともない回転する回転軸を備え、落下防止装置は、回転軸に接続される液圧回路部を備え、液圧回路部は、回転軸に接続される液体モータと、液体モータに液路を介して接続され、液体が貯留される貯留部と、を備え、液体モータの少なくとも一方の出入口と、貯留部の出入口と、の間を接続する単一又は複数の液路には、方向制御弁及び流量制御弁の少なくとも1つが配置される、落下防止装置。【選択図】図3


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    Title :

    FALL PREVENTION DEVICE, LIFT, WELDING SYSTEM, AND FALL PREVENTION METHOD


    Additional title:

    落下防止装置、昇降機、溶接システム、及び落下防止方法


    Contributors:

    Publication date :

    2024-09-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B23K Löten , SOLDERING OR UNSOLDERING / 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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