Closing sequence of door wings - is controlled so that wing with top rabbet is connected to motorised door opener before wing with bottom rabbet

摘要

The arrangement consists of a first door wing (2) swinging on first hinges (2a) and a second door wing (3) swinging on second hinges (3a). The first wing (2) has a bottom rabbet (4) and the second wing (3) has a top rabbet (5). During the closing action the first wing (2) takes precedence to the second wing (3) i.e the first wing (2) is first to reach its closed position, followed by the second wing (3). Both wings are provided with electro-hydraulic drives (12,13). The circuit of the drive of the second wing (3) is provided with a shutoff valve with a bypass incorporated into the hydraulic circuit of the first wing (2) producing a temporary blockage of the movement of the second wing (3) giving the first wing (2) a change to close first. USE/ADVANTAGE - The arrangement makes the design suitable for automatic doors.