| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulating property and to enlarge a wooden window by separately arranging a pair of suspension rails in the inside and outside directions with a wooden bulkhead member between them on an inner surface of an upper frame part of a window frame and supporting a sash through a sash pulley on each of the rails. SOLUTION: An upper frame part 1a of a window frame 1 is supported and fixed on a crossbeam B through a height regulating mechanism 3. A bulkhead member 10 is wooden and integrally formed with the upper frame part 1a. A pair of suspension rails 9 is separated to the side of an indoor part 1 and to the side of an outdoor part 0 and fixed with a fixing screw 11 with the wooden bulkhead member 10 sandwiched between them on an inner peripheral surface of the upper frame part 1a. As sashes 2A, 2B are supported on the suspension rails 9 through a sash pulley 12 free to move, it is possible to enlarge a wooden window A. Sinking of a central part by its weight is prevented by supporting the central part of the upper frame part 1a by the crossbeam B through the height regulating mechanism 3. Sinking is corrected by fastening a regulating screw 5 and a nut 6 of the height regulating mechanism 3 so as to reduce a clearance between the upper frame part 1a and a bracket 4. |
