Lower door section having a folding roller bracket

A door having a door body that is to be lifted, along a predetermined path, from a closed position in which the door closes a wall opening into an open position in which the door is located substantially overhead, the door body having two, three or more door body elements arranged one on top of the other in the closed position and hinged together along articulation axes running roughly perpendicular to the predetermined path, wherein a lower edge of the door body in the closed position and trailing during the lifting is to be lifted separately, at least when the door reaches the open position, by a pivoting movement of a lower door body element having said edge in a lifting direction with respect to a door body element situated above the lower door body element in the closed position relative to the predetermined path, characterized by a limiting device which limits the pivoting movement of the lower door body element in the lifting direction at least along a segment of the predetermined path,

• wherein a traction means lifting the door body from the closed position to the open position is connected at one end of the traction means to the lower edge of the door body by a coupling device and is coupled at another end of the traction means to a weight equalizing device, said coupling device arranged at the lower edge and able to pivot relative to a pivot axis running parallel to the articulation axes, and wherein the traction means opposes a first pretensioning device configured to force the separately liftable edge of the lower door body element into the predetermined path upon moving from the open position to the closed position,
• wherein the lower door body element with the separately liftable edge is connected to a guide element by means of a pivoting lever of a lever assembly making possible a changing of a distance between the guide element arranged on the door body element and the lower door body element, wherein the guide element is pivoted upon reaching the open position, by a pivoting of the pivoting lever relative to a lever axis in a direction opposite the lifting direction with respect to the lower door body element,
• wherein the limiting device comprises a first limiting element coordinated with the coupling device and able to pivot with the first limiting element relative to the pivot axis, and a second limiting element coordinated with the lever assembly and able to pivot with the second limiting element relative to the lever axis, wherein the first limiting element comprises a limiting link at least partly embracing the lever axis or the pivot axis, the pivot axis being situated beneath the lever axis in the closed position,
• wherein the limiting link comprises a collar extending transversely from a bracket of the coupling device that runs roughly perpendicular to the articulation axes, and an end stop element of the second limiting element is mounted on the pivoting lever and comes to bear against the limiting surface of the limiting link facing toward the pivot axis during the pivoting movement of the lower door body element in the lifting direction.