PROBLEM TO BE SOLVED: To provide a boom capable of ensuring transition between a winding state and an elongation state even when stress relaxation occurs as a long-time winding sate or elongation state.SOLUTION: A bloom body 10 is dynamically unstable in a state having two states of an elongation state and a winding state, and changes to the elongation state or the winding state by an elastic restoration force, and characterized in that an assisting force member 20 made of an elastic long metallic plate material is superimposed along the boom body 10 so as to move relatively in a longitudinal direction, and changing to the elongation state or the winding state of the boom body 10 is assisted by the elastic restoration force of the assisting force member 20.SELECTED DRAWING: Figure 1

    【課題】長期間巻き形態あるいは伸展形態として応力緩和が生じたとしても、巻き取り形態と伸展形態間の移行を確実に進行させ得るブームを提供する。【解決手段】ブーム本体10は伸展形態と巻き取り形態の2形態を有する状態では力学的に不安定で、弾性復元力によって伸展形態あるいは巻き取り形態に移行するブームであって、弾性を有する長尺の金属製板材によって構成される助勢部材20を前記ブーム本体10に沿って長手方向に相対移動自在に重ねて設け、前記助勢部材20の弾性復元力によって、前記ブーム本体10の伸展形態あるいは巻き取り形態への移行を助勢する構成となっていることを特徴とする。【選択図】図1


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    Title :

    BOOM


    Additional title:

    ブーム


    Contributors:

    Publication date :

    2018-01-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B64G Raumfahrt , COSMONAUTICS



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