| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint structure capable of preventing a mortise 3 and a tenon 4 from being broken by dispersing load applied on them and reducing depth of the mortise 3 to reduce area of a chipped part. SOLUTION: This joint structure is composed of a drawing-close structure by drawing-close hardware 10 fitting the tenon 4 corresponding to the shallow and wide mortise 3 into the mortise 3 and letting the inside of the horizontal member 2 pass in the axial direction of the horizontal member 2. The mortise 3 has at least a bottom face 5, side walls 6, 7 on both sides, and a bottom wall 8 connecting them. Both side walls 6, 7 are arranged in a taper shape forming a wide interval between them in an upper part and a narrow interval between them in a lower part. The bottom wall 8 is formed by a curved face having a gently rising-up central part and is gently connected with both side walls. COPYRIGHT: (C)2008,JPO&INPIT
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