Trolley for a slide bracket cover for HGV or HGV trailers

The carriage has a securing device (4) encompassing a wedge element associated with a roller (3). The wedge element is shiftable between a release position and a secured position. The wedge element is not in contact with the roller in the release position, where a portion of the wedge element is arranged between the roller and guidance and runner rail (2) in the secured position. The wedge element is connected to a lever (8) pivotably about a rotation axis (7). The lever is arranged pivotably about a pivot bearing (9) arranged at distance from the rotation axis.