door for vehicles particularly railway vehicles and subways

摘要

The door comprises two panels (2) slidable in a straight line towards and away from each other and mounted on a frame which, in turn,can move between a position of substantial alignment with the outer surface of the vehicle and a position outside this surface. The sliding of each panel (2) from the closed position towards the open position is thus effected by means of a translational movement of the frame (3,4) and a sliding movement of the actual panel (2) on the frame (3,4), performed in ordered sequence. Each panel is held (6) substantially barycentrically both in the closed position and in the open position. The translational movement of the frame (3,4) is controlled by a hydraulic jack actuating device, bearing in association with it a hook member which permits the movement of the frame towards the outer position only as a result of the operation of the actuating device.