| 摘要 |
PURPOSE: A double window equipped with a roll screen and guided by a guide roller, capable of minimizing friction force, is provided to block sunlight with the roll screen, thereby preventing an indoor temperature rise. CONSTITUTION: An air layer(14) is formed between a pair of glass plates(12). A roll screen(30) transfers a screen member(34) up and down in the air layer(14). The screen member(34) is wound on a rotary shaft(35). A magnetic clutch(C) is formed on the rotary shaft(35). A magnetic motor(M) actuates the magnetic clutch(C). A vacuum maintaining rotator(20) removes air from the air layer(14).
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