Patent attributes
Included are: a screen member 33: a fitter member 35 attached to a side end 33a of the screen member 33; a rail member 91 having a first chamber 91a and a first slit 91b joining the first chamber 91a, the first chamber 91a accommodating the side end 33a of the screen member 33 and the fitter member 35 passing through the first slit 91b to thereby allow the rail member 91 to hold the screen member 33 movably in a longitudinal direction of the first slit 91b; and a retainer 93 for retaining the rail member 91. The rail member 91 is compressively deformed in the width direction of the first slit 91b by the retainer 93, and the width of the first slit of the compressively deformed rail member 91 is narrower than the thickness T1 of the fitter member 35.