| 摘要 |
PROBLEM TO BE SOLVED: To dispose an interior casing disposed on the indoor side of a double glazing inner sash, in proximity to an upper guide rail part for the inner sash of a window frame. SOLUTION: An interior casing 40 is provided on the indoor side of a window frame 10 supporting a double glazing inner sash 20 and a double glazing outer sash 30 slidably. An inner sash upper guide rail part 11f and an inner sash lower guide rail part 12b provided at an upper frame 11 and a lower frame 12 of the window frame 10 are slidably supported in a state of being respectively decentered onto the outdoor side parts from the center parts in the indoor- outdoor direction of an upper rail 21 and a lower rail 22 of the double glazing inner sash 20. The indoor side upper edge parts of the upper rail 21 and lower rail 22 are respectively cut out, and the indoor-side side parts of the upper rail 21 and lower rail 22 are positioned inside the interior casing 40. |
