| 摘要 |
PROBLEM TO BE SOLVED: To secure water cut performance of an upper frame and drainage performance of a lower frame, by vertically arranging left-right frames, and slantingly arranging upper-lower frame so as to expansively open on the bathroom side. SOLUTION: While forming respective fitting projection pieces 43 of a corner frame 4 in a one side-inclined front trapezoidal shape as a vertical side surface 45 on the outer wall 1 side and an inclined side surface 46 on the bathroom wall surface 3 side, the left-right frames 5a are formed in a plane trapezoidal shape by forming its upper-lower end parts as an inclined end part 56 of the same angle as the inclined side surface 46 of the fitting projection pieces 43, and the upper-lower frames 5b are formed in a plane rectangular shape, and are framed as a window connecting frame A by fitting the fitting projection pieces 43 of the corner frame 4 to a fitting groove 53 of the left-right frames 5a and the upper-lower frames 5b. As a result of slantingly arranging the corner frame 4 in response to an inclination of the left-right frames 5a by allowing the inclined side surface 46 of the fitting projection pieces 43 to absorb the inclination of the left-right frames 5a, the upper-lower frames 5b arranged in this corner part can be slantingly arranged in an expansively opening shape. COPYRIGHT: (C)2007,JPO&INPIT
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