PROBLEM TO BE SOLVED: To improve an expansion device of a telescopic boom to be mounted on a mobile crane, and to provide the expansion device of a telescopic boom which is inexpensive, easily undergoes maintenance, and enables so-called B pins and C pin to smoothy drive.SOLUTION: A drive mechanism 17 for driving B pins 26 to 30 and a C pin 34 includes a hydraulic pressure supply part 18 and a drive source generation part 19. The drive source generation part 19 causes the hydraulic pressure supply part 18 to generate prescribed hydraulic pressure on the basis of air pressure. The hydraulic pressure supply part 18 includes an accumulator 75 and an AOH 51 and supplies hydraulic pressure to a boom connection mechanism 15 and an inter-boom fixing mechanism 16. The drive source generation part 19 adopts a pneumatic pressure supply part 41, and sends compressed air to the hydraulic pressure supply part 18.SELECTED DRAWING: Figure 6

    【課題】移動式クレーンに搭載される伸縮ブームの伸縮装置の改良。いわゆるBピン及びCピンの円滑な駆動の実現し得るコスト安価でメンテナンスが容易な伸縮ブームの伸縮装置の提供。【解決手段】Bピン26〜30及びCピン34を駆動する駆動機構17は、油圧供給部18及び駆動源発生部19を備える。駆動源発生部19は、空気圧に基づいて油圧供給部18に所定の油圧を発生させる。油圧供給部18は、アキュムレータ75及びAOH51を有し、ブーム連結機構15及びブーム間固定機構16に油圧を供給する。駆動源発生部19は、空圧供給部41を採用し、圧縮空気を油圧供給部18に送給する。【選択図】図6


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    Title :

    EXPANSION DEVICE OF TELESCOPIC BOOM


    Additional title:

    伸縮ブームの伸縮装置


    Contributors:

    Publication date :

    2016-09-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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