| 摘要 |
<p>A coupling (1) for joining together two sections of a ladder or the like, said coupling comprising a female socket (2) and a male spigot (3) adapted for fitting to said respective sections to be joined with the co-operation of said socket and said spigot effecting said joint wherein said socket includes a socket housing (4) having an internal dock (5) for receiving said spigot said dock including at least one tapered side, said tapered side including a negative step (6) forming a keeper and wherein said spigot includes a spigot body (7) having a tapered reference portion (8) adapted to snugly engage said tapered dock and a section engaging portion (9) protruding therefrom and one or a plurality of jaws (10) pivoted to said spigot body said jaw or jaws including a protruding lug adapted to co-operate with said keeper and a biasing means adapted to expand open said jaws against said tapered dock.</p> |
