Provided in the present invention is an elevating device driven by multi-staged screws, which elongates or shrinks the length of a first screw and a second screw which are simultaneously rotated by the operation of a driving unit, thereby stably elevating a cage or a platform. Moreover, when the first and second screws abnormally descend due to a load applied on the case or the platform, the operation of the driving unit is immediately stopped upon detection thereof in order to prevent a safety accident, thereby improving safety.

    본 발명은 구동부의 구동에 의해 동시에 회전하는 제1 및 제2스크류의 길이를 신장 또는 축소시켜 케이지나 플랫폼을 안정적으로 승하강시키되, 상기 케이지나 플랫폼에 가해지는 하중에 의해 상기 제1 및 제2스크류가 비정상적으로 하강할 경우 이를 감지하여 상기 구동부의 구동을 즉시 정지시켜 안전사고 발생을 예방하여 안전성 향상을 도모할 수 있도록 한 다단의 스크류에 의한 승강장치를 제공하고자 한다.


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    Title :

    Multi-stage screw-driven lifting device


    Additional title:

    다단의 스크류에 의한 승강장치


    Contributors:
    CHUNG HAN MO (author) / KIM SUNG SOO (author)

    Publication date :

    2019-05-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    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



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