| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve cut-off performance of a sash that is provided with a vertical frame auxiliary material on the inner peripheral side of a vertical frame. <P>SOLUTION: A sash has a frame 1 that is assembled in a four-side frame by an upper frame, a lower frame, and a vertical frame 3, and a Shoji 2 supported in the frame so as to be freely opened/closed. The frame 1 has the vertical frame 3, and a vertical frame auxiliary material 4 provided in the inner peripheral side of the vertical frame. The vertical frame auxiliary material 4 has an outer air introduction port 6 for introducing the outer air into a hollow part 5 between the vertical frame 3 and vertical frame auxiliary material 4, at the intermediate part in the longitudinal direction. <P>COPYRIGHT: (C)2013,JPO&INPIT |
