| 摘要 |
The fixing mechanism, primarily for use with cover plates to cover trenches, road works etc., comprises a coupling mechanism 32 for securing the mechanism to the underside of the cover plate 18 and at least two legs 22 pivotally connected to the coupling mechanism which are movable between a stowed and a deployed position. A collar 30 is threaded on a screw-threaded shaft 34 that is rotatably connected to the coupling mechanism with a number of struts 28 connecting the collar to respective legs so that rotation of the shaft moves the collar and the struts to extend or retract the legs. The coupling mechanism preferably releasably connects the fixing mechanism to the cover plate and may comprise male and female connectors which, once engaged, are locked in place with a locking pin or spring-biased pins. Alternatively the fixing mechanism may comprise a square or rectangular tube which is received in a channel socket in a friction fit. The shaft is preferably rotatable from above the cover plate and the legs preferably include feet with grip formations. The feet, struts or legs may be resiliently deformable. |
