| 摘要 |
PURPOSE: To prevent the breaking of double glazing window panes by holding a section between the double window panes under an airtight state and arranging a thermal fuse melted when air in an opening reaches a fixed temperature in a fire in an airtight manner. CONSTITUTION: Double glazing window panes 4 are composed of a pressure- resistant window pane 7 and a heat-resistant window pane 8 integrally connected so as to have a required opposed space through an annular spacer 5. The outer circumferential section of the spacer 5 is filled with fillers 16 and a section between both window panes 7, 8 is held under an airtight state, and a thermal fuse 9 is inserted into a through-hole 10 in an airtight manner. When air in the space 6 reaches a fixed high temperature in a fire, the fuse is melted, and air at high pressure and the high temperature is discharged to the outside from the through-hole 10. Accordingly, the possibility of the breaking of the double glazing window panes can be eliminated at the pressure of high-temperature air while a fire, smoke, a gas or the like is interrupted surely and the spread of the fire can be prevented. |
