Slideable load area

The base (2) has a base plate (7) that is movable into a guide (6) backwardly from front end position to a loading port. A flap (8) is pivotably assigned to a front edge of the plate, where the flap is adjustable between a horizontal position and a fold-up position. The flap lies in a plane of the plate in the horizontal position, and the flap includes an obtuse angle or right angle with the plane of the plate in the fold-up position. The flap is arranged in the front end position in the horizontal position, and the flap is arranged outside the end position in the fold-up position.