PROBLEM TO BE SOLVED: To provide a detection device for the come-off prevention of a telescopic beam of a traveling crane which can detect a change of a clearance between cylindrical members of the telescopic beam by the wear of a pad caused by a tolerance at manufacturing and a use age by a detector, and can prevent the breakage or the like of the detector by the direct abutment of the detector on the cylindrical member at a detected part side.SOLUTION: A crane main body and a self-traveling counterweight bogie are connected to each other by a telescopic beam, and in the telescopic beam, a plurality of cylindrical members 51, 52 are arranged in a nest shape. A detection device 70 for the come-off prevention of the telescopic beam comprises a detector 73 which is arranged between the two cylindrical members which adjoin each other at the inside and outside of the telescopic beam, and in a position at the side at which one cylindrical member 52 comes off from the other cylindrical member 51, and a variation mechanism 74 which varies the position of the detector 73 following a change of a clearance between the two cylindrical members 51, 52.SELECTED DRAWING: Figure 6

    【課題】伸縮ビームの筒状部材間の隙間が製造時の公差や使用経年によるパッドなどの摩耗などで変化するときでも検知器による検知をすることができ、検知器が被検知部側の筒状部材に直接当たって破損などをするのを防止できる移動式クレーンの伸縮ビーム抜け出し防止用検知装置を提供する。【解決手段】クレーン本体と自走式のカウンターウェイト台車とが伸縮ビームにより連結され、この伸縮ビームは、複数の筒状部材51,52を入れ子状に配置してなる。伸縮ビーム抜け出し防止用検知装置70は、伸縮ビームの互いに内外に隣接する2つの筒状部材間でかつ一方の筒状部材52が他方の筒状部材51から抜け出す手前側の位置に設置された検知器73と、この検知器73の位置を、前記2つの筒状部材51,52間の隙間の変化に追従して変動させる変動機構74とを備える。【選択図】図6


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    Titel :

    DETECTION DEVICE FOR COME-OFF PREVENTION OF TELESCOPIC BEAM OF TRAVELING CRANE AND TRAVELING CRANE


    Weitere Titelangaben:

    移動式クレーンの伸縮ビーム抜け出し防止用検知装置及び移動式クレーン


    Beteiligte:

    Erscheinungsdatum :

    2017-04-20


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B66C Krane , CRANES



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