| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sash by which high airtightness/high heat insulation can be obtained and stress given to a door roller or a rail can be decreased and further, even a heavy sliding door can be lightly opened.SOLUTION: A sash 2 is provided which is opened/closed by moving on a rail 3 provided on a lower frame 1a of a window frame 1. In a lower frame 2c of the sash 2, on both sides in a movement direction, a pair of door rollers 4 are disposed at one side and the other side in a thickness direction of the sash 2. In the lower frame 2c, two rails 3 guiding the pair of door rollers 4 are provided in parallel with a movement direction. On the two rails 3, higher parts which are made higher than the lower frame 2c are formed at positions of the door rollers 4 in the state of closing the sash 2, and slopes are formed which are made lower from the higher parts in a direction of opening the sash 2. In the lower frame 2c and an upper frame 2d of the sash 2, airtight members 5 and 6 are disposed between the lower and upper frames and the window frame 1, respectively. In the state where the sash 2 is closed, the sash 2 is pulled upwards by the higher parts of the rails 3 and the airtight members 5 and 6 are brought into press-contact with the window frame 1.</p> |
