To provide a simply configured device capable of retracting a jib to a boom side from an attitude where a boom is inclined front in a vertical direction and the jib is drooped.SOLUTION: A part 50 to be retracted is fitted to a jib 40. A retracting part 70 is fitted to a boom 30 so as to be rotatable with respect to the boom 30 about a rotary shaft 70a in a horizontal direction Y (width direction of the boom 30). The retracting part 70 is configured so as to come into contact with the part 50 to be retracted from a front side X1 in an attitude where the boom 30 is inclined and the jib 40 is drooped. The rotary shaft 70a is disposed on an upper side Z1 or a lower side Z2 with respect to the part 50 to be retracted in the attitude where the boom 30 is inclined and the jib 40 is drooped.SELECTED DRAWING: Figure 3

    【課題】上下方向に対して前側にブームが傾斜するとともにジブが垂下した姿勢から、ジブをブーム側に引き込めるようにし、そのための装置を簡易に構成できるようにする。【解決手段】被引込部50は、ジブ40に取り付けられる。引込部70は、ブーム30に取り付けられ、横方向Y(ブーム30幅方向)の回転軸70aを中心にブーム30に対して回転自在である。引込部70は、ブーム30およびジブ40がブーム傾斜ジブ垂下姿勢のときに、被引込部50に前側X1から接触可能に構成される。回転軸70aは、ブーム30およびジブ40がブーム傾斜ジブ垂下姿勢のときに被引込部50に対して上側Z1または下側Z2に配置される。【選択図】図3


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    Title :

    JIB RETRACTING DEVICE AND JIB RETRACTING METHOD


    Additional title:

    ジブ引込装置およびジブ引込方法


    Contributors:

    Publication date :

    2018-12-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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