| 摘要 |
PROBLEM TO BE SOLVED: To realize highly reliable and highly accurate folding/unfolding operation while promoting lightening and strengthening. SOLUTION: Six pairs of wire members 90, 91 are tensioned by respectively crossing intermediate parts on a diagonal line between outside vertical members 24a, b, c, d, e, f of an unfolding truss 20 joined by a truss in a freely foldable and unfloable manner by combining four-side links 21a, b, c, d, e, f in a radial shape. One end is joined by the links to one end of the outside vertical members 24a, b, c, d, e, f of the four-side links 21a, b, c, d, e, f to the pairs of wire members 90, 91 to be constituted so as to install rod members 92, 93 having the other end supported by the wire members 90, 91 in a part extended from intersections x1, x2, x3, x4, x5, x6 of the wire members 90, 91.
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