To provide a boom with bistability whose initial resistance in self-extension is small so that the boom can surely progress the self-extension even when the boom is held in a rolled-up form for a long time.SOLUTION: A boom main body comprises a plurality of lengthy divided boom parts extending parallely in a longitudinal direction, and a bendable connection part connecting the plurality of divided boom parts. The divided boom parts respectively have bistability with which, in an extending form, the parts extend straight in the longitudinal direction and cross sectional shapes thereof in a direction orthogonal to the longitudinal direction are held being bent into an open cross sectional shape, and in a rolled-up form, the cross sectional shapes in the direction orthogonal to the longitudinal direction extend linearly, then bend in the longitudinal direction to be kept rolled up. In the extending form, the plurality of divided boom parts respectively constitute part of the open cross sectional shape of the boom main body, and the open cross sectional shape of the boom main body as a whole is held by the connection part.SELECTED DRAWING: Figure 3
【課題】自己伸展の初期抵抗が小さく、巻き取り形態に長期間保持した場合でも、確実に自己伸展を進行させ得る双安定性ブームを提供する。【解決手段】ブーム本体は、長手方向に平行に延びる複数の長尺の分割ブーム部と、複数の分割ブーム部を連結する屈曲可能の連結部を備え、前記分割ブーム部は、それぞれ、伸展形態では、長手方向に直線状に伸び、かつ、長手方向と直交方向の断面形状が開断面形状に湾曲する形態に保持され、巻き取り形態では、長手方向と直交方向の断面形状が直線状に伸び、長手方向に湾曲して巻き取られた形態に保持される双安定性を有し、伸展形態では、前記複数の分割ブーム部が、それぞれ前記ブーム本体の開断面形状の一部を構成し、前記連結部によって全体としてブーム本体の開断面形状を保持する構成となっている。【選択図】図3
BOOM WITH BISTABILITY
双安定性ブーム
2021-09-09
Patent
Elektronische Ressource
Japanisch
IPC: | B64G Raumfahrt , COSMONAUTICS |
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