| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sash which prevents a combustible gas generated from the heat insulator of a sill in the case of fire from entering the inside of an outer sash and prevents the outer sash from being dropped off. <P>SOLUTION: The sill 5 of a sash frame comprises an outdoor-side sill material 5a having an external rail 9, an indoor-side sill material 5b having an internal rail 10, a resin heat insulator 7 connecting the outdoor-side sill material 5a and the indoor-side sill material 5b, and a reinforcement material 23 disposed between the external and internal rails 9 and 10. The reinforcement material 23 has an external rail reinforcing part 23b along the external rail 9. A refractory material 68 for blocking the gap 67 between the outdoor-side sill material 5a and the reinforcement material 23 with foam resulting from the heat in the case of fire is disposed at a position closer to the outdoor side than the heat insulator 7. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
