Sliding door system

Sliding door system with a rail device, the rail device comprising:

• a mounting rail mountable in a building,
• a guide rail in which at least two carriages that are connected to a sliding door are held displaceable along a guide axis (x), and
• a plurality of coupling devices, the guide rail and the mounting rail are releasably connected to the plurality of coupling devices, the plurality of coupling devices each including:
• a coupling head that is connected to the guide rail or to the mounting rail,
• a coupling plate;
• and
• a coupling neck that is anchored to a coupling opening, the coupling opening being provided in the mounting rail or the guide rail and including:
• a first opening part with a first diameter that is larger than a diameter of the coupling plate, and
• a second opening part adjacent to the first opening part with a diameter larger than a diameter of the coupling neck but smaller than the diameter of the coupling plate, wherein at least on one side of the coupling head a ramp is provided, in a direction towards the coupling neck, and the ramp increases in height towards the coupling plate.