WINDOW OPENING/CLOSING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a window opening/closing device which can bring the force of movement of a sash toward an opening-opened position close to a fixed level. SOLUTION: This window opening/closing device 1 comprises: a window frame 2 which is mounted on a building; the sash 4 which is arranged in the opening 3 defined in the window frame 2 and which opens/closes the opening 3; a connecting means 32 which makes an upside portion 31 in vertical direction V of the sash 4 turnably connected to the window frame 2 so that the sash 4 can make the opening 3 freely openable/closable on the basis of an airflow; and an urging means 5 which is connected to the sash 4 and the window frame 2 so as to urge the sash toward the opening-closed position. The opening 3 is opened by the opening-opening movement of the sash 4 toward the outside 7 of the building, and closed by the opening-closing movement of the sash 4 toward the inside 8 of the building. COPYRIGHT: (C)2009,JPO&INPIT