PROBLEM TO BE SOLVED: To provide a boom fixation pin drive mechanism with a simple structure capable of fixing and releasing between adjacent booms.SOLUTION: A boom fixation pin drive mechanism 10 is provided with a fixation hole 20 arranged in plurality in each boom inside, a boom pin supporting part 30 which applies a pushing-in force Fa to a boom pin 31 while supporting the boom pin 31 retractably to the fixation hole 20, and a boom pin drive part 40 which is arranged in a base boom and applies a pulling force Fb to the corresponding boom pin 31. Each pull cable 37 is fixed to the corresponding boom pin 31 at one end and is arranged a lever piece 38 at the other end and each boom pin drive part 40 has a hook piece 43 which receives the corresponding lever piece 38 at the position where the boom arranged with the corresponding boom pin supporting part 30 is most retracted toward the base boom.SELECTED DRAWING: Figure 4

    【課題】簡易な構造で隣接するブーム間の固定およびその解除を行うことのできるブーム固定ピン駆動機構を提供する。【解決手段】内側の各ブームに複数設けられた固定穴20と、固定穴20に対してブームピン31を進退可能に支持しつつ押込力Faをブームピン31に付与するブームピン支持部30と、ベースブームに設けられて引出力Fbを対応するブームピン31に付与するブームピン駆動部40と、を備えるブーム固定ピン駆動機構10である。各プルケーブル37は、一端が対応するブームピン31に固定され、かつ他端にレバー片38が設けられ、各ブームピン駆動部40は、対応するブームピン支持部30が設けられたブームがベースブームに対して最も後退された位置で、対応するレバー片38を受け入れる引掛片43を有する。【選択図】図4


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    Title :

    BOOM FIXATION PIN DRIVE MECHANISM


    Additional title:

    ブーム固定ピン駆動機構


    Contributors:

    Publication date :

    2018-05-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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