| 摘要 |
PROBLEM TO BE SOLVED: To provide a sash capable of preventing air and flames from spreading through the inside/outside of a room, when warping in a fire.SOLUTION: A sash 2 is stored in a frame body 1 in an openable/closable manner, the frame body 1 has top and bottom frames and right and left vertical frames framed in a rectangular shape, and the sash 2 has a panel body 4 stored in a stile/rail body 3 which has top and bottom rails and right and left stiles framed in a rectangular shape. On the inner peripheral faces of the frame body 1, flame shielding wall parts 30, 35, 40, and 40 are provided which have opposed faces 31, 36, 42, and 42 opposed to the outer peripheral faces of the stile/rail body 3. The flame shielding wall parts are formed not to interfere with the sash 2 when opened/closed, and the opposed faces are formed over the four upper, lower, right and left peripheries of the frame body 1 so that depth-direction positions overlap with one another. |
