| 摘要 |
A retractable covering system comprising a screen 1 which is movable between a retracted and an extended configuration and at least two tensioning members 2a,b attached to a leading edge 6 of the screen arranged to pull the screen in opposite transverse directions so as to create transverse tension in the screen. The tensioning members are capable of providing tension in the screen continually throughout deployment and/or retraction of the screen. The tensioning members may be cables attached to the corners 7 of the leading edge of the screen arranged to pull the screen longitudinally in the direction of extension as well as transversely. The tensioning members are preferably attached to supports 3 at the opposite end to the leading edge. A reinforcing member 9 may be provided between the two attachment points at the leading edge of the screen. The screen is preferably made from a flexible material which when retracted may be stored in a housing 4. At least one edge of the covering system may be adapted so that when tension is applied parallel to that edge tension is generated substantially perpendicular to said edge. |
