PROBLEM TO BE SOLVED: To provide a jib attaching/detaching mechanism which prevents a length of a wire from changing.SOLUTION: The jib attaching/detaching mechanism has a connecting pin 85 provided below a tip of an adaptor 70 and has recessed parts 92A and 93A provided which engage with a shaft member of a jib support 42. The jib attaching/detaching mechanism engages the recessed parts 92A and 93A of the jib support 42 with the connecting pin 85 by pulling up the jib support 42 with a wire W1 by a winch, then turns the jib support 42 with the connecting pin 85 as a center by deflating a cylinder, and fits a jib to an adaptor 70 of the boom head by connecting upper connection parts 80 and 81 of the adaptor 70 to upper connection parts 90 and 91 of the jib support 42. The jib attaching/detaching mechanism is further is provided with an attaching/detaching link 100 that, when the jib support is turned with the connecting pin 85 as the center by deflating the cylinder, prevents a length of the wire W1 pulled up by the winch from changing.SELECTED DRAWING: Figure 12

    【課題】ワイヤ長さが変化することのない着脱機構を提供する。【解決手段】アダプタ70先端の下部に、連結ピン85が設けられ、ジブサポート42の軸部材に係合する凹部92A,93Aが設けられ、ジブ本体をブームヘッドの前方に横たわらせて、ジブサポート42をウインチによりワイヤW1で引っ張り上げることによって、ジブサポート42の凹部92A,93Aを連結ピン85に係合させ、この後、シリンダを収縮させることによりジブサポート42をその連結ピン85を中心にして回動させて、アダプタ70の上連結部80,81とジブサポート42の上連結部90,91とを連結させることによってジブをブームヘッドのアダプタ70に装着させるジブの着脱機構であって、シリンダの収縮によって連結ピン85を中心にしてジブサポートを回動させた際に、ウインチによって引っ張り上げられているワイヤW1の長さが変化しないようにする着脱リンク100を設けた。【選択図】図12


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    Title :

    JIB ATTACHING/DETACHING MECHANISM


    Additional title:

    ジブの着脱機構


    Contributors:

    Publication date :

    2016-06-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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