Door sealing device, door sealing system and door leaf for a rail vehicle

A door sealing device for sealing a gap between a door leaf and a frame for a rail vehicle, comprising:

• a flexible tubular hollow chamber formed by two opposite contact walls and two opposite side walls, in a mounted state of the door sealing device, wherein the door sealing device is for sealing the gap between the door leaf and the frame for the rail vehicle;
• wherein a first contact wall of the contact walls faces the door leaf and a second contact wall of the contact walls faces the frame so that the hollow chamber is subject to compression in the event of a closing motion of the door leaf, to move the contact walls towards each other, and
• wherein the sidewalls are formed to be buckled along predetermined buckle lines in response to the compression,
• wherein a connecting element includes a link connected to the hollow chamber along an outer edge of the hollow chamber connecting the first contact wall of the contact walls to a first sidewall of the sidewalls,
• wherein the connecting element includes an elongate bulge for establishing a positive connection with another connecting element of the door leaf or the frame, and wherein the hollow chamber and the elongate bulge are arranged alongside each other and connected to each other via the link,
• wherein the elongate bulge extends parallel to the hollow chamber and is continuously connected to the hollow chamber via the link, so that the link continuously passes between the elongate bulge and the hollow chamber,
• wherein the contact walls are aligned at least approximately parallel to each other,
• wherein a first sidewall of the sidewalls includes only a single buckle line, formed as a first predetermined buckle line, and a second side wall of the sidewalls includes only a single buckle line, formed as a second predetermined buckle line,
• wherein the hollow chamber includes, starting from a relaxed state of the hollow chamber, a characteristic force-travel curve with respect to a compressive force causing the compression and a seal travel caused by the compressive force with a declining gradient, and
• wherein the hollow chamber is formed to provide, when a compression occurs, a seal travel of at least 8 mm.