Swing-and-slide door for vehicles especially railroad passenger vehicles

In a swing-and-slide door for vehicles, especially railroad passenger vehicles, having a doorway frame mounted in an opening in the wall of a superstructure, a door leaf, means mounting the door leaf in the frame such that the door leaf is displaced outward in an initial stage of motion from a closure position into a ready-to-slide position and then in a second stage of motion slide horizontally to the side along the outside of the superstructure into a fully-open position, wherein the direction of motion that occurs during the initial stage is strictly at a right angle to the direction of slide that occurs during the second stage, including a suspension mechanism in the vicinity of an upper edge and a positioning mechanism in the vicinity of the lower edge of the doorway frame inside the superstructure for sliding the leaf horizontally to the side, wherein the suspension mechanism includes a supporting rail, a supporting section suspending the leaf on the supporting rail for sliding movement, and wherein the suspension mechanism is attached to a stud of one crank and the positioning mechanism is attached to a stud of another crank, the cranks being both vertically separated by horizontal shaft studs and the crank studs that extend along the direction of slide and connected by a connecting section, the improvement wherein the supporting section comprises a positioning bushing around the supporting rail and connected to the leaf in the immediate vicinity of a meeting edge of the leaf that is at the rear in relation to the directio,n of displacement while the door is being opened and the positioning mechanism includes a positioning rail rigidiy connected to the leaf and that extends parallel to the direction of displacement, a positioning section slides back and forth in and establishing a mechanical interlock in a horizontal plane, wherein the positioning section is rigidly fastened to the stud of said another crank web and is positioned such that, when the door is closed, it supports the leaf in the immediate vicinity of the meeting edge that is forward in relation to the direction of displacement while the door is being opened.