To provide a device for restricting the opening of a window or door, the device being mounted to an existing window or door to prevent it from opening by more than a predetermined amount, while achieving a desired controlled state through remote centralized control.
An abutting member 13 is fixed in an appropriate position of a sliding window or door and a body part 1 is constructed by providing a detecting part 12 for detecting the open or closed condition of the window or door and a locking member 11 which is movable between a locking position where it locks the abutting member when the window or door is opened by a predetermined amount to prevent further opening of the window or door, and an open position where it does not lock the abutting member during the opening or closing movement of the window or door. The body part is controlled by a remote controller or a centralized control part and prevents the locking member from moving to the locking position when the detecting part detects that the window or door is open by the predetermined amount or more.
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