PROBLEM TO BE SOLVED: To prevent in advance, force deviation when a jib component adjacent to a base jib is extruded from the base jib, and breakage of the jib body caused by the force deviation, generation of galling on a slide part between the jib component and the base jib, and reduction of derricking capability of the jib body due to resistance caused by bending of the jib body.SOLUTION: Jib derricking cylinders 7L, 7R are arranged on left and right parts of a base jib 2, then a jib component 3 adjacent to the base jib 2 is extruded without deviation in any direction, with a center axis of a jib body 5 as a reference.SELECTED DRAWING: Figure 1

    【課題】ベースジブに隣接したジブ構成要素をベースジブから押し出す際の力の偏りの発生と其れに伴うジブ本体の損傷,ベースジブに隣接したジブ構成要素とベースジブとの間の摺動部におけるカジリの発生,ジブ本体の湾曲がもたらす抵抗によるジブ本体の起伏能力の低下を未然に防止する【解決手段】ジブ起伏シリンダ7L,7Rをベースジブ2の左右に配置してジブ本体5の中心軸を基準として何れの方向の偏りも生じることなくベースジブ2に隣接したジブ構成要素3を押し出すようにする。【選択図】図1


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    Title :

    JIB DERRICKING DEVICE OF WORK MACHINE


    Additional title:

    作業機のジブ起伏装置


    Contributors:

    Publication date :

    2017-05-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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