| 摘要 |
PROBLEM TO BE SOLVED: To provide a natural wind power ventilation window of a projected window type operated lightly by natural wind force. SOLUTION: The natural wind power ventilation window has both-side vertical frames 11 of a window frame, short main arms 3 which are provided between stiles 21 of a shoji screen 2 and the vertical frames respectively, one ends of which arms are pivotally mounted one end on the upper part of the stile and the other ends of which arms are pivotally mounted on the vertical frame at a position lower than the one end, and a sub-arm 4 one end of which is pivotally mounted on an intermediate part of the stile, the other end of which is pivotally mounted on a lower end of the vertical frame and which is longer than the main arm. In the state that the shoji screen 2 is closed, each arm 3 and 4 is directed in the substantially vertical direction, and a pivotally mounted position to the stile of each arm is positioned upward of the pivotally mounted position to the stile of each arm. The center of gravity of the shoji screen 2 is located at a position biasing the shoji screen 2 to an outside side by the weight W of the shoji screen 2. When it is opened, swinging motion of each arm is stopped by stoppers 18a and 32b. COPYRIGHT: (C)2003,JPO
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