Adjustment Device for a Sliding Roof Cover on a Vehicle

A adjustment device for a sliding roof cover on a vehicle, comprising a guide rail, which runs in a longitudinal direction, for guiding sliders which are arranged in series in the longitudinal direction and control the movement of the sliding roof cover, wherein the first slider can be moved along the guide rail by means of a drive device and, over a part of its movement range, drives the second slider, and over another part of its movement range, leaves the second slider behind in a predefined position along the guide rail, wherein a locking element, which can be adjusted in height in a manner controlled by the first slider, is arranged on the second slider, which locking element, when the second slider is left behind, is placed by means of a height adjustment into a form-fitting connection with a guide rail section in order to lock the second slider to the guide rail. Here, in order to avoid unfavourable forces during the locking and release of the second slider, it is proposed according to the invention that a rotary bar, which can be rotated about a vertical axis in a manner controlled by the first slider, is also arranged on the second slider, which rotary bar, when the second slider is left behind, is rotated into a rotational position which secures the locking action after the height adjustment of the locking element.