| 摘要 |
PURPOSE:To prevent the reduction of the yield by dividing the frame or stile of fittings into indoor side members and outdoor side members made of an extruded structural angle, and providing a thinning groove on the bottom face of a caulking hole inserted with the end section of a heat insulating bridge material for caulking. CONSTITUTION:The stiles 1 and rails 2 of a sash 20 are constituted of outdoor side members 1a, 2a, indoor side members 1b, 2b, and bridge materials 5, 6 between them made of an aluminum alloy extruded structural angle. A pivotally fitting section 27 formed on the indoor side member 2b of the rail 2 of the sash 20 is coupled with a fulcrum section 26 formed on the indoor side member 23b of a lower side lateral frame 23, and the sash 20 can be rotated to be prostrated to the indoor side, and the opening angle is restricted so that the sash is not opened beyond the maximum extension of a link 19. The stile 1 of the sash 20 is formed to engulf the rail 2, and the bottom face section of the caulking hole 3 of the outdoor side member 1a of the stile 1 is made larger in thickness than the forming face of an airtight material holding piece 7. A thinning groove 13 is provided on the bottom face section of the caulking hole 3. |
