| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulation sash that effectively prevents heat from being transferred from a metallic stile to indoor and is excellent in heat insulation property.SOLUTION: A heat insulation sash includes a window frame attached to a building opening, and a sash attached with a resin stile having a hollow part in an indoor side of a metallic stile having a hollow part. In the resin stile, a plurality of hollow parts covering the indoor side of the metallic stile are stacked in a depth direction, and at least any one of the hollow parts covers the whole area of an indoor side surface of the metallic stile.SELECTED DRAWING: Figure 6 |
