| 摘要 |
PROBLEM TO BE SOLVED: To provide a door frame structure for assembling frame single bodies in a rectangular frame shape by a corner joint. SOLUTION: An end part of the frame single bodies 1 is provided with a 45-degree inclined end surface 5, and a right-angled cutoff part 6 having the acute angle pointed end corresponding place cut off at a right angle to the longitudinal direction. The corner joint 8 is provided with mutually right angle-turning two inserting parts 9 and 10 inserted into a square cylindrical part 2 of the respective two frame single bodies 1 on which the mutual 45-degree inclined end surfaces 5 abut mutually, and a square columnar part 11 for finishing a projected corner part of both frame single bodies 1 at a right angle by fitting to a square columnar recessed place formed of the right-angled cutoff part 6 of both respective frame single bodies 1. Both respective frame single bodies 1 and the respective inserting parts 9 and 10 of the corner joint 8 are fastened by a screw. COPYRIGHT: (C)2005,JPO&NCIPI
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