| 摘要 |
PROBLEM TO BE SOLVED: To further improve thermal insulation performance between a frame body and a sash.SOLUTION: A fitting includes a frame body that has a resin frame provided on the indoor side of a metal frame, and a sash that has a resin stile/rail provided on the indoor side of a metal stile/rail. An airtight material abutting on an outer peripheral surface of the resin stile/rail of the sash from an inner peripheral surface of a jamb is provided, and an airtight material abutting on an indoor side surface of the resin stile/rail of the sash from the resin frame is provided. Thus, a heat insulating space is formed on the indoor side of the resin stile/rail between the frame body and the sash.SELECTED DRAWING: Figure 3 |
