To provide a boom device which saves effort of an operator in work such as preliminary work and end work.SOLUTION: A boom device 12 comprises a stationary ring 44, a screw shaft 43, a motor 46 and a strain sensor 45. The stationary ring 44 has an annular ring-shape including a notch 48. The stationary ring 44 threadably engages with the screw shaft 43. The screw shaft 43 is rotated by the motor 46. The screw shaft 43 rotates when the motor 46 is rotated and the stationary ring 44 rotates around a central axis C by the rotating screw shaft 43. Fixation of a hook 40 for hanging a burden is released when the stationary ring 44 rotates as far as position that the notch 48 of the stationary ring 44 overlaps with the hook 40 for hanging the burden. The hook 40 for hanging the burden is fixed by the stationary ring 44 when the stationary ring 44 rotates with the motor 46 being rotated after the hook 40 for hanging the burden enters into inside of the stationary ring 44 from the notch 48.SELECTED DRAWING: Figure 3

    【課題】準備作業や終了作業等の作業におけるオペレータの手間を省くブーム装置を提供する。【解決手段】ブーム装置12は、固定リング44、ネジ軸43、モータ46、及び歪みセンサ45を備える。固定リング44は、切欠48を有する円環状である。固定リング44は、ネジ軸43と螺合する。ネジ軸43は、モータ46によって回転される。モータ46が回転されると、ネジ軸43が回転し、回転するネジ軸43によって、固定リング44が中心軸C周りに回転する。固定リング44の切欠48が、吊荷用フック40と重なる位置まで固定リング44が回転すると、吊荷用フック40の固定が解除される。吊荷用フック40が切欠48から固定リング44の内側に進入した後、モータ46が回転されて固定リング44が回転すると、固定リング44によって吊荷用フック40が固定される。【選択図】図3


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    Title :

    BOOM DEVICE AND CRANE VEHICLE


    Additional title:

    ブーム装置及びクレーン車


    Contributors:

    Publication date :

    2021-02-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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