| 摘要 |
PROBLEM TO BE SOLVED: To prevent the formation of a through-hole between a mainframe and a subframe, even in a high-temperature state resulting from fire disaster or the like.SOLUTION: A fixture includes a mainframe 133 to be fixed to a building frame W, and a subframe 233 which supports an outswinging sash 20. The subframe 233 is fixed to the depth surface of the mainframe 133. An expansion space R with the circumference surrounded between the mainframe 133 and the subframe 233 is formed, and a thermally expandable material 40 which expands in a high temperature state is arranged inside of the expansion space R.SELECTED DRAWING: Figure 3 |
