| 摘要 |
PURPOSE: An insulative sash structure of a project pull down window with improved structural rigidity, airtightness, and waterproofness is provided to decrease heat transmission using heat bridge preventive materials and to improve airtightness between indoor and outdoor spaces. CONSTITUTION: An insulative sash structure of a project pull down window with improved structural rigidity, airtightness, and waterproofness comprises an indoor side window frame (70), an outdoor side window frame (80), a first heat bridge preventive material (90), an exposed cover frame (100), a support frame (110), a second heat bridge preventive material (120), and a center gasket (130). The first heat bridge preventive material is inserted into an insertion groove inside the indoor and outdoor side window frames. The second heat bridge preventive material is inserted into an insertion groove inside the exposed cover frame and the support frame. The center gasket separates the first heat bridge preventive material from the second heat bridge preventive material. The center gasket is attached to the top end of the second heat bridge preventive material and the bottom end of the first heat bridge preventive material. |
