| 摘要 |
A tarpaulin (3,5) for covering outdoor surfaces comprises two rectangular sheets (10,11) adherent along a perimeter band (14c) to form a main air chamber (13) equipped with re-leasable check valve (25,63) for inflation and deflation. The tarpaulin has a frame of holes (9) for fixing the tarpaulin to the edges of the covered surface. The upper surface (10) of the inflated tarpaulin assumes a convex form that prevents the stagnation of dirt and rainwater. On the external face of one of the two sheets, preferably the lower one (11), a second air chamber (18) is obtained comprising a longitudinal channeling equipped with its own releasable check valve placed at a free end of the tarpaulin, the other end being connectable to the drum of a winch around which the deflated tarpaulin can be wound. The inflation of the longitudinal channels (18) causes the unrolling of the tarpaulin (3,50) wound on the drum. |
