Rolling-unrolling device for a protective cover

A Rolling-unrolling device for a protective cover for covering a surface to be protected, said device comprising a roller tube supported at the ends thereof by two carriages provided with wheels, at least one of said wheels is a drive wheel, and means for driving the rotation of said roller tube and of said at least one drive wheel designed to displace said device in translation relative to said surface to be protected in one direction in order to unroll said cover and in the opposite direction in order to roll up said cover, said device further comprising a braking system designed to slow or prevent the rotation of said at least one drive wheel of the carriages and cause said cover to be tensioned at least during the rolling up of said cover on said roller tube, characterized in that said at least one drive wheel comprises a core supporting a rim comprising a tire, in that said core is designed to slip on said rim under the action of a slippage force originating from their difference in rotational speed, and in that said braking system is designed to act on the core of said at least one drive wheel.