| 摘要 |
PROBLEM TO BE SOLVED: To improve fireproof performance of an aperture device.SOLUTION: An aperture device includes a window frame and a movable sash fitted to the window frame. The movable sash is a heat insulation sash comprising an edge member including a metallic outdoor side edge member and a heat insulation material indoor side edge member that are connected by a connection part. On the window frame provided a heating foam material extending from the indoor side of the window frame to the outdoor side in the depth direction over an opposite position opposite to the connection part of the window frame.SELECTED DRAWING: Figure 4 |
