To provide a crane backstop posture changing device capable of easily and safely changing the posture of a crane backstop from a stored posture to a supported posture.SOLUTION: A backstop lifting device 60 comprises a first support member 61, a second support member 62, and a lifting cylinder 66. The first support member 61 has a tip side connection 614 connected to a backstop 45, and the second support member 62 has a base end side connection 624 connected to a lower boom 16A. The lifting cylinder 66 has a push-up part 67 that can push up a pushed-up part 611R of the first support member 61 so as to relatively elongate the first support member 61 along a reference straight line CL with respect to the second support member 62 following elongation of a cylinder rod 662 with respect to a cylinder body 661 in a state where the backstop 45 is set in a stored posture and so as to change the posture of the backstop 45 from the stored posture to a supported posture.SELECTED DRAWING: Figure 6

    【課題】クレーンのバックストップを格納姿勢から支持姿勢に容易かつ安全に姿勢変更させることが可能なクレーンのバックストップ姿勢変更装置を提供する。【解決手段】バックストップ昇降装置60は、第1支持部材61と、第2支持部材62と、昇降シリンダ66とを有する。第1支持部材61は、バックストップ45に接続される先端側連結部614を有し、第2支持部材62は下部ブーム16Aに接続される基端側連結部624を有する。昇降シリンダ66は、バックストップ45が格納姿勢とされた状態でシリンダロッド662がシリンダ本体661に対して伸長することに伴って第1支持部材61を第2支持部材62に対して基準直線CLに沿って相対的に伸長させバックストップ45を格納姿勢から支持姿勢に姿勢変更させるように第1支持部材61の被押上部611Tを押し上げることが可能な押上部67を有する。【選択図】図6


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    Title :

    CRANE BACKSTOP POSTURE CHANGING DEVICE


    Additional title:

    クレーンのバックストップ姿勢変更装置


    Contributors:
    KOIZUMI YUKIO (author) / MIYA EIJI (author) / NISHIJIMA KOJI (author) / KURIHARA SHINGO (author) / ETO TAKAO (author)

    Publication date :

    2022-05-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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