Dimensionally adequate for the transit of persons in its interior, the main characteristic of which lies in the fact that it consists of a self-supporting, modular and removable cover, which allows simple and fast assembly, independent of said conveyor belt, in addition to subsequent folding in a horizontal position for those times of year when said cover is not used, giving it a high degree of watertightness and resistance to strong winds, with ensuing benefits in terms of visual impact and respect for the natural landscape, in addition to the possibility of using the entire outer surface of the cover as an advertising medium.