| 摘要 |
PROBLEM TO BE SOLVED: To provide an opening device having more excellent fireproof performance than ever.SOLUTION: A double sliding window 1 includes a window frame 10, and inner and outer sashes 20 and 30 that are openably/closably fitted into the window frame 10. The inner sash 20 comprises a framework body 25, and glass 26 that is fitted into the framework body 25. In the double sliding window 1, heating-foamable materials 71 and 71 are attached to the peripheries of air introduction holes 242 and 242 formed in a glass groove part 240 of a door end stile 24 into which a peripheral edge of the glass 26 is inserted. |
