The hinge arrangement is movable with wheels in the rails.The hinge is located in the trailer sides. The cover (2) can be lifted so that the hinge arrangement (4) locates against the trailer (1) rear gable.The front wheel is located in one end of an arm and the other end is located on the hinge at a distance from the location of the second wheel on the hinge so that the cover can be lifted further when the hinge supports against the trailer rear gable. The arm is raised in relation to the hinge and the upper position of the cover corresponds to an angle which is greater than the movement of the hinge in the cover
