To quickly determine a rope winding defect on a drum of a winch device.SOLUTION: An image processing part derives one or more winding index values indicating the winding state of a rope 31 from a photographing image taken by a camera 45. A defect determination part 611 determines whether or not the rope winding defect occurs by determining whether or not the winding index values satisfy a predetermined defect condition. The winding index values include one or more of: a spacing between multiple ridge line parts lined along the axial direction for each winding layer of the rope; a mutual height difference between the multiple ridge line parts for each winding layer; a height difference of the ridge line parts before and after the winding layer increases; and a spacing in the axial direction between one of a pair of flanges formed at both axial ends of the drum and the ridge line part formed first in the uppermost layer when the winding layer increases.SELECTED DRAWING: Figure 1

    【課題】ウインチ装置のドラムにおけるロープの巻き取り不良を速やかに判定すること。【解決手段】画像処理部は、カメラ45により得られる撮影画像から、ロープ31の巻き取り状態を表す1つ以上の巻き取り指標値を導出する。不良判定部611は、前記巻き取り指標値が予め定められた不良条件を満たすか否かを判定することにより、前記ロープの巻き取り不良が発生したか否かを判定する。前記巻き取り指標値は、前記ロープの巻き取り層ごとに前記軸方向に沿って並ぶ複数の稜線部の間隔と、前記巻き取り層ごとの前記複数の稜線部の相互の高さの差と、前記巻き取り層が増加する前後における前記稜線部の高さの差と、前記ドラムにおける前記軸方向の両端に形成された一対のフランジ部の一方と前記巻き取り層が増加したときに最上層に最初に形成される前記稜線部との前記軸方向の間隔と、のうちの1つ以上を含む。【選択図】図1


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    Title :

    ROPE WINDING DETERMINATION DEVICE, CRANE, AND ROPE WINDING DETERMINATION METHOD


    Additional title:

    ロープ巻き取り判定装置、クレーン、ロープ巻き取り判定方法


    Contributors:

    Publication date :

    2020-08-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66D Haspeln , CAPSTANS



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