PROBLEM TO BE SOLVED: To provide a telescopic device of a telescopic boom in which operability of the telescopic boom can be improved while reducing a cost, an insertion work can be efficiently performed, and a cross sectional area of the entire telescopic boom can be limited to a minimum required area.SOLUTION: A telescopic mechanism 5 of a telescopic device 3 of a telescopic boom 1 comprises: a rod-like support member 10 whose one end side is fixed to a base end side in a third boom 23 via a connection shaft extending horizontally and which is arranged in a top boom 24; a sheave 61 for extending the third boom; and a wire 62 for extending the third boom. The rod-like support member 10 is formed so as to be built in the top boom 24 while a sheave 71 for extending the top boom is arranged at a tip side thereof. In the wire 62 for extending the third boom, one end is fixed to a base end side of a telescopic cylinder 4, and the other end is fixed to the connection shaft.SELECTED DRAWING: Figure 1

    【課題】低コスト化を図りつつ伸縮ブームの操作性を改善でき、差し込み作業の効率化を図ることができ、伸縮ブーム全体の断面積を必要最小限に抑えることができる伸縮ブームの伸縮装置を提供する。【解決手段】伸縮ブーム1の伸縮装置3の伸縮機構5は、サードブーム23内の基端側に、左右に延びる連結軸を介して一端側が固定されてトップブーム24内に配置される棒状サポート部材10と、サードブーム伸長用シーブ61およびサードブーム伸長用ワイヤ62とを備えている。棒状サポート部材10は、その先端側にトップブーム伸長用シーブ71を配置してトップブーム24に内蔵するように形成されている。サードブーム伸長用ワイヤ62は、一端が伸縮シリンダ4の基端側に固定され、他端が連結軸に固定されている。【選択図】図1


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    Title :

    TELESCOPIC DEVICE OF TELESCOPIC BOOM


    Additional title:

    伸縮ブームの伸縮装置


    Contributors:

    Publication date :

    2016-05-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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