To provide a joint that achieves a higher load-bearing capacity for a metal plate box structure while controlling the weight and resulting in a higher load capacity of the entire boom.SOLUTION: There is provided a telescopic boom which includes a joint provided on side faces of at least two retractable cylinder fittings 33 to fix the retractable cylinders to the telescopic boom. A bearing plate of the retractable cylinder fitting 33 has a metal plate box structure composed of three partial retractable cylinder boxes 40, 50, and 60.SELECTED DRAWING: Figure 3

    【課題】本発明は、金属板箱構造に対してより高い耐荷重性を達成し、且つ、重量も抑制しながら、ブーム全体のより高い負荷能力に帰着する結合部を提供する。【解決手段】少なくとも2つの引込みシリンダ取付け具33の側面に、引込みシリンダを伸縮自在ブームに固定するように設けられた結合部を備える伸縮自在ブーム。引込みシリンダ取付け具33の軸受板は、3つの部分引き込みシリンダ箱40、50、60から構成される金属板箱構造である。【選択図】図3


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    Title :

    TELESCOPIC BOOM AND MOVABLE CRANE


    Additional title:

    伸縮自在ブーム及び可動式クレーン


    Contributors:

    Publication date :

    2020-10-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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