courtesy has steps to be retractable in order to access door and the output of a rail transport of passengers

摘要

Footboard arrangement with retractable treads for the door of a passenger wagon, which can be adapted to platforms of different levels. It comprises: A) an upper tread (6) which can move between a retracted position and a horizontal extended position near an upper platform level (1) under the influence of a jack (13) acting on swing bars (12,40) driving carriages (10,10A), B) a lower tread (7) which can move a) between a retracted position and a first extended position forming a riser, under the influence of the same jack and the same swing bars driving two further carriages (11), and b) between the first extended position and a horizontal position corresponding to a lower platform level (2,3) under the influence of a second jack (23) driving it in rotation about horizontal swing bars (26). IMAGE