| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a hindrance to an efficiency increase in sash frame assembling work, due to being fairly difficult for work for accurately boring a screw hole, for conventionally requiring to bore the screw hole in a sash frame material when fixing the mutual sash frame materials, though widely using a sash frame constituted by combining a light alloy hollow extrusion molding material in a rectangular shape. SOLUTION: This corner joint is composed of a body 1 forming a rectangular solid shape, and a shelf-shaped sash frame material end surface fixing plate 2 integrally formed so as to overhang outside from one side surface side of the body 1. A screw shaft part inserting elongate hole 5 having a small diameter and a screw head part inserting recessed part 6 having a large diameter, are continuously formed over the other end surface 4 from one end surface 3 of the body 1. A screw shaft part inserting through-hole 15 having a small diameter and a screw head part inserting pan-shaped through-hole 16 having a large diameter, are integrally formed on the opening end side of the sash frame end surface fixing plate 2 by penetrating through its obverse and reverse. COPYRIGHT: (C)2006,JPO&NCIPI
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