Door, in particular sectional door, and door drive

A door drive for a door for moving a door leaf from a completely open position into a closed position and vice versa, wherein

• the door comprises several interconnected panels of the door leaf,
• pairs of track rollers are connected with the several panels, and wherein the pairs of track rollers are designed to guide a respective panel in guide rails,
• the pairs of track rollers comprises an uppermost pair of track rollers, a bottommost pair of track rollers, and at least one middle pair of track rollers,
• the uppermost pair of track rollers, the bottommost pair of track rollers, and the at least one middle pair of track rollers each run in separate guide rails,
• the guide rails of the uppermost pair of track rollers have a course which in one portion has a curvilinear and trough shape containing no kink or kink point,
• wherein the curvilinear and trough shaped portion of the course of the uppermost pair of track rollers is located between the guide rail for the bottommost pair of track rollers and the guide rail for the at least one middle pair of track rollers;
• and
• wherein the guide rail for the bottommost pair of track rollers and the guide rail for the at least one middle pair of track rollers run separately and disconnected from each other and the course of the uppermost guide rail at the curvilinear and trough shaped portion of the course of the uppermost pair of track rollers;
• and
• the door drive comprises a drive motor, a guiding device, and a carrier, wherein the carrier is connected with the door leaf, and a controller, wherein, on opening of the door from the closed position, the door is initially moved to at least one ventilation position by the controller such that an uppermost panel of the several interconnected panels is tilted and the upper most pair of the track rollers is located in the curvilinear and trough shaped portion of the course of the respective guide rails of the uppermost pair of track rollers.