| 摘要 |
A plinth (1) comprises a rectangular base frame (7 fig 5) adapted in use to be secured to a floor and an internally threaded support cylinder (10 fig 5) mounted at each corner of the base frame with its axis vertical. A set of telescopic tubular support legs (4;5;6 figs 1,2,3) are adapted to be telescopically received one in each of the support cylinders (10 fig 5). Each telescopic tubular support leg comprises an outer support leg cylinder (12;13;14 figs 6,7,8) having an external thread (17 fig 6) adapted to co-operate with the internal thread of a support cylinder (10 fig 5) and internal thread (18 fig 8) adapted to co-operate with an external thread (19 fig 10) formed on an inner support leg cylinder (15;16 figs 10,11) such that the inner support leg cylinder is telescopically supported in the outer support leg cylinder |
