To provide a crane in which a gib is prevented from inclined backward due to repercussion, and which has a wide crane work range.SOLUTION: A rough terrain crane 1 comprises: a boom 30 which can derrick in a front-rear direction; a gib 40 which is provided at an upper end of the boom 30, and can be inclined forward with respect to the boom 30; and a repercussion prevention device 60A which is provided between the boom 30 and the gib 40, and prevents the gib 40 from inclining backward from a forward inclination state. The repercussion prevention device 60A has: a rod part which extends from the boom 30 to an intermediate part of the jib 40 via the front of a terminal of the jib 40 on the boom 30 side in the state that the gib 40 is inclined forward; a holding part which is provided at the intermediate part of the jib 40, and slidably holds the rod part; a latch part provided in the holding part; and a stopper which is provided in the rod part, and latches the latch part thereby stopping slide of the rod part when the rod part is slid with respect to the holding part only a constant distance.SELECTED DRAWING: Figure 2

    【課題】ジブがあおられて後傾することを防止すると共に、クレーン作業の作業範囲が広いクレーンを提供する。【解決手段】ラフテレーンクレーン1は、前後方向に起伏可能なブーム30と、ブーム30の上端に設けられ、ブーム30に対して前傾可能なジブ40と、ブーム30とジブ40との間に設けられ、ジブ40が前傾した状態から後傾することを防止するあおり止め装置60Aと、を備える。あおり止め装置60Aは、ジブ40が前傾した状態で、ブーム30から、ジブ40のブーム30側の末端の前方を経由して、ジブ40の中間部へ延在するロッド部と、ジブ40の中間部に設けられ、ロッド部をスライド可能に保持する保持部と、保持部に設けられた掛止部と、ロッド部に設けられ、ロッド部が保持部に対して一定の距離だけスライドした場合に、掛止部を掛止させてロッド部のスライドを停止させるストッパと、を有する。【選択図】図2


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    Title :

    CRANE AND REPERCUSSION PREVENTION DEVICE


    Additional title:

    クレーン及びあおり止め装置


    Contributors:

    Publication date :

    2019-04-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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