Cargo container cover

A cover for an opening in a cargo container, the cover comprising a flexible curtain secured at the top of the opening to the container, wherein the curtain has at its sides and lower portion peripheral tunnels accommodating at least one peripheral strand, and at its back inclined tunnels accommodating at least two bracing strands, the curtain including at its lower portion spaced apart fittings including each guiding and attachment means for the strands, over-centre clip means for simultaneously pulling taut said one peripheral strand and said at least two bracing strands during relative pivoting movement of first and second parts of said over-centre clip means, said over-centre clip means being an over-centre clip having first and second parts, said second part being attached to the container adjacent the opening, and said first part being connected to said one peripheral strand and said at least two bracing strands whereby upon movement of said first part from a nonover-centre position relative to said second part to an over-centre position of said first part relative to said second part, said peripheral and bracing strands are drawn taut.