| 摘要 |
<p>A rigid anti-theft cover (3), for covering of shafts leading to underground mains-water systems, hingedly mounted on a frame (1) with two side edges (32A, 32B) bearing two projecting parts (30A, 30B) and engaging into two cells (10) of the frame which are at least partially overhung by a wall (13) of this frame to provide an axis of articulation parallel to a hinging border (31) of the cover. The cover also has an elastic finger (36) extending parallel to the side edges (32A, 32B) with a free end situated in proximity to the hinging border (31) and co-operating with a pressure lug (14) borne by the corresponding hinging edge (11) of the frame to permit, by elastic deformation of the finger (36) supported against the lug (14), positioning of the projecting parts (30A, 30B) into their respective cells (10) and their removal.</p> |
