The dropout prevention hook and removal prevention pipe

摘要

(57) [summary] [challenge] less on work effort is also reduced in part, once the attached hooks that do not fall out from between the pipe (frame) and the top plate safety, excellent economy dropout prevention It provides the hooks and pipe. A locking top 22 of the hook 2 is formed by bending the curved V-shaped or the like viewed from the side direction, locking the upper part 22 is fitted to the upper surface 30 of the pipe 3 is bent in the curved shape is formed in the groove portion 31 can be, by the top plate 1 from above is coated fixed in a state where the curved locking the upper 31 fits into the groove 31 of the pipe an upper surface 30, in preventing possible configurations missing hooks 2 is there.