| 摘要 |
PROBLEM TO BE SOLVED: To provide a sash of high heat insulation performance.SOLUTION: A sash comprises a frame 11, an outer sash 12a and an inner sash 12b, and horizontal frames 13 and 14 comprise bridge materials 33a, 33b, 34a and 34b in two places in the depth direction, and one vertical frame 15 comprises bridge materials 48a and 49a in one place near the outdoor side, and the other vertical frame 16 comprises bridge materials 48b and 49b in one place near the indoor side, and outdoor side bridge materials 33a and 34a of the horizontal frames 13 and 14 and the bridge materials 48a and 49a of the one vertical frame 15 continue, and indoor side bridge materials 33b and 34b of the horizontal frames 13 and 14 and the bridge materials 48b and 49b of the other vertical frame 16 continue, and the outer sash 12a and the inner sash 12b comprise bridge materials 5a, 5b, 6a and 6b in respective stiles 1, 2, 3 and 4, and the bridge materials 33a, 33b, 34a, 34b, 48a, 48b, 49a and 49b of the frame 11 and the bridge materials 5a, 5b, 6a and 6b of the sashes 12a and 12b are opposed. |
