The present invention relates to a multi-stage boom for boom cranes with low deflection. According to the present invention, the multi-stage boom for boom cranes comprises: a boom (3) rotatably installed on a vehicle (10) and expandable and contractable in multiple stages by a plurality of unit boom bodies (31, 32, 33); and a deflection resistance beam (5) coupled to an upper surface of the boom (3) in multiple stages so as to be expandable and contractible together. Therefore, since the deflection of the boom that is used for high-altitude work while extended can be minimized by the deflection resistance beam, it is possible to improve the safety and efficiency of work at heights as well as prevent safety accidents.

    본 발명은 처짐이 적은 붐크레인용 다단붐에 관한 것으로, 차량(10)에 회전 가능하면서 복수의 단위붐체(31,32,33)에 의해 다단으로 신축 가능하게 설치되는 붐대(3); 및 상기 붐대(3)의 상면에 함께 신축 가능하도록 다단으로 결합되는 처짐저항보(5);를 포함하여 이루어지는 것을 특징으로 하며, 따라서 길게 연장된 상태로 고소 작업을 하는 붐대의 처짐을 처짐저항보에 의해 최소화시킬 수 있으므로, 고소 작업의 안정성 및 효율성 제고는 물론 안전사고의 예방을 도모할 수 있게 된다.


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    Title :

    Deflection Resistant Type Multi-Stage Boom For Boom Crane


    Additional title:

    처짐이 적은 붐크레인용 다단붐


    Contributors:
    LIM DAE WOO (author)

    Publication date :

    2023-05-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B66C Krane , CRANES



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