To provide a crane wire hooking number switching device that can easily switch the number of wire hooking number with a simple structure.SOLUTION: A crane wire hooking number switching device 28 comprises a sheave 45 provided at a tip 20 of the boom and around which a hanging wire 17 is hung, a floating sheave block 50 having a sheave 53 around which the hanging wire 17 extending from the sheave 45 is hung, a sheave 47 provided at the tip 20 and around which the hanging wire 17 extending from the sheave 53 is hung, a hook block 60 to which the hanging wire 17 extending from the sheave 47 is connected, and a connecting pin that connects the hook block 60 and the floating sheave block 50 so that they can be disconnected. n×m>M is satisfied, where n is the number of hanging wires 17 of the floating sheave block 50, m is the mass of the hook block 60, and M is the mass of the floating sheave block 50.SELECTED DRAWING: Figure 1

    【課題】簡単な構造でワイヤ掛け数の切替を容易に実行することができるクレーンのワイヤ掛数切換装置を提供する。【解決手段】ワイヤ掛数切換装置28は、ブームの先端部20に設けられており吊荷用ワイヤ17が掛け回されるシーブ45と、シーブ45から延びた吊荷用ワイヤ17が掛け回されるシーブ53を有する遊動シーブブロック50と、先端部20に設けられておりシーブ53から延びた吊荷用ワイヤ17が掛け回されるシーブ47と、シーブ47から延びた吊荷用ワイヤ17が接続されたフックブロック60と、フックブロック60及び遊動シーブブロック50を連結解除可能に連結させる連結ピンとを備える。nが遊動シーブブロック50の吊荷用ワイヤ17の掛け数で、mがフックブロック60の質量で、Mが遊動シーブブロック50の質量の場合に、n×m>Mを満たす。【選択図】図1


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    Title :

    CRANE WIRE HOOKING NUMBER SWITCHING DEVICE


    Additional title:

    クレーンのワイヤ掛数切換装置


    Contributors:

    Publication date :

    2021-03-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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