| 摘要 |
PROBLEM TO BE SOLVED: To provide a member to effect assembly at a low cost, simply, easily and accurately by any one, in a member to mount a regular triangular frame material during formation of a regular icosahedron. SOLUTION: In a roof type mounting member which has a development plane shape having a given width and is inclined from a center B toward left and right ends A-C, an upper side ABC angle is 116. 565 deg. at a point B. Mounting holes are formed laterally symmetrically. A segment line to intercouple E, being the center of a lower side DEF, and the center B of an upper side is folded inward and this mounting member is manufactured that 60 deg. is held at the top parts B and E of ABC and DEF.
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