| 摘要 |
A securing device for doors, particularly doors of a railway carriage, has a latching arrangement including a latch bolt 43 and a corresponding receptor into which the bolt is to be urged, the latch bolt being designed for use in a secondary locking system. In order to allow the latch to open even when a passenger is leaning against it, the latch bolt has an oblique end surface so that it can be pushed out of the receptor by a force applied in a direction transverse to the urging direction. To make the latch nevertheless secure when the train is moving the latching arrangement further includes a deadlocking means provided by bellcrank 49 and a recess 40 operable on the bolt 43 so as to prevent the bolt being pushed out when the deadlock has been actuated. The device preferably includes a mechanical sensor (55), (Fig 6B) to indicate whether the door is closed. The deadlocking means in (Fig 2a) includes a pair of pivoted levers. <IMAGE> |
