An upright socket and spigot assembly

摘要

An upright assembly comprises a double-walled socket 50 and a spigot 52. The spigot has axially spaced annular walls 53, 54 which mate with corresponding walls 58, 59 in the socket 50 to provide an assembly which is easily releasable. An intermediate annulus 55 between walls 53, 54 remains spaced from an inner wall 60 of socket 50 upon mating with spigot 52. Socket 50 includes a projection 61 to assist anchorage of socket 50 in a hole in the ground.