| 摘要 |
PROBLEM TO BE SOLVED: To provide a cubic unit type assembly structure for combining so that each outer circumferential face of a pipe and a corner coupling becomes flush. SOLUTION: The corner coupling 12 is formed as a coupling body 12a which is a cube having a side length of L<SB>1</SB>. A rectangular projection 12b for connecting is formed on an outer circumferential face having a side length of L<SB>2</SB>for inserting into an end part of the pipe 11. Relation between the outer circumferential face of the projection 12b for connecting and the outer circumferential face of the coupling body 12a is (L<SB>1</SB>-L<SB>2</SB>)×1/2=L<SB>3</SB>. A connecting hole 11a on an end of the pipe 11 connected to the coupling body 12a has an inside diameter slightly larger than the side length L<SB>2</SB>of the projection 12b for connecting. Thickness of the pipe 11 is equal to L<SB>3</SB>. COPYRIGHT: (C)2005,JPO&NCIPI
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