Disclosed is a gap bridging device (1) for a rail vehicle, for bridging the gap (4) between a passenger compartment floor and a platform (3), comprising a step plate (6) which is mounted so as to be horizontally slidable, and a swivel arm (5) which is hingedly connected to the step plate (6) by means of a joint (10), the swivel arm (5) being equipped with a vertically movable swivel joint (14) at the end facing away from the joint (10).
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