| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that connection of upper and lower rails and right and left stiles constituting the frame of a door is an L asymmetric shape and since corner fittings of different shapes are used on four corners respectively, assembling working is troublesome. SOLUTION: Upper and lower rails (2 and 3) having widths (6) and right and left stiles (4 and 5) having the widths (6) are connected through the corner fittings (12). The corner fitting (12) comprises a block-like body (13) of a cross sectional rectangle comprising an extrusion shape material, and has first screw grooves (14 and 14) extending on the front in a longitudinal direction, and a second screw groove (15) extending on the side in the longitudinal direction. Screws (20 and 24) from each frame are screwed in both the screw grooves (14 and 15). Projections (18 and 19) are provided on the body (13). COPYRIGHT: (C)2005,JPO&NCIPI
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