| 摘要 |
A one way security door system for controlling egress of a user along a path between an entrance 14 and an exit 15. A plurality of moveable door panels 20, 22, 24 are moveable along a forward path between the entrance and exit defined by first pair of surfaces 10, 26. The door panels are also moveable in a return path between the exit and entrance defined by a second pair of surfaces 26, 12. A moveable restricting mechanism prevents access by a user by a user along the return. At least one door panel in the forward path prevents a user moving beyond the door panel at any one time. The restricting mechanism may comprise a retractable barrier 102 blocking the return path or the presence of a door may simply block the return path. The door panels may be driven along an orbital track where they slide along the passage in the forward direction and pivot at the exit and slide along the preferably narrow return path which is equal to the thickness of the door. Rather than sliding in the forward direction the doors may pivot about a post (65, fig.6b) |
