PNEUMATIC

Principle operation of the pneumatic Swing plug doors

The definition of the Swing Plug door is based on the aspect that the door opens by means of plugging out of the door portal followed by a swing movement till the open position.
This movement is generated by the rotation of the door pillars (A) which are connected to the door leaves (B) by means of the pillar arms.

During the movement the door leaves are kept parallel to the car body with the parallel arms (C).

The rotation of the door pillars are initiated by the pneumatic torque cylinder (D) and the linkage (E) between those.

The cylinder is kept in the “over centre” position in the door closed position, realizing the mechanical locking of the door, also in case the air pressure to the cylinder is lost.

This door system can have as well a double leaf as a single leaf configuration.