Device for covering a surface, comprising attachment rolls along the edges of the cover

A device for covering a surface comprising:

• (a) a substantially rectangular cover having two longitudinal edges opposite one another and two transverse edges opposite one another, each longitudinal edge being provided with a bead extending along said edge, said bead being formed by a core of substantially prismatic geometry contained in a tubular sheath provided over its entire length with a strip fixed to at least one face of the cover,
• (b) a rotationally mounted drum adapted for winding or unwinding the cover, said drum being mounted on a longitudinal translation mechanism comprising rails placed on either side of said surface and each consisting of a profile having an opening on one of its faces and oriented away from the surface to be covered, said face comprising at least one wing situated on the side adjacent to the surface to be covered and partially closing said opening;
• (c) a system for fixing said cover at a transverse end of the surface such that the translation and the rotation of the drum result in the unwinding/winding of the cover over the surface to be covered;
• and
• (d) a continuous system for locking the bead of the longitudinal edges of the cover in the opening of said rails enabling the bead to be engaged under the wing as the cover is unwound and to be disengaged as it is rewound
• wherein the core of the bead is fixed to the tubular sheath so as to prevent it from slipping along the sheath, while maintaining a flexibility of the bead that is sufficient for the operations of unwinding/winding the cover over the surface to be covered.