| 摘要 |
A door or window (1) comprises a main frame (10) and at least one wing (101) fitted movably to the main frame, in such a way that the door or window can assume an open condition and a closed condition, and sealing means (200), positioned in such a way that they are interposed between main frame and wing when the door or window is in the closed condition. The sealing means comprise at least one gasket (303, 307) extending along at least part of the perimeter of the main frame and a movable sealing member (230, 250) supported movably by one of the said main frame and wing, and capable of exerting a compressive force on the gasket against the other of the said main frame and wing when the door or window is in the closed condition. The sealing means comprise operating means (210, 220) for making the movable sealing member move between an activated position, in which the movable member exerts the compressive force on the gasket with the door or window in the closed condition, and a disabled condition, in which the movable member removes the compressive force from the gasket with the door or window in the closed condition. The movable sealing member comprises a sealing counter-frame (250) which extends along the whole perimeter of the main frame and is fitted to the main frame in such a way as to be movable with respect to both wing and main frame when the said door or window is in the closed condition, in a direction (A) perpendicular to the plane defined by the main frame.
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