STRUCTURE FOR LINKAGE OF DUCT AND COVER

摘要

PROBLEM TO BE SOLVED: To avoid the existence of a linking tool on the top surface of a cover and prevent the linking tool from becoming an obstacle against walking on a duct and protect the linking tool from being removed by walking. SOLUTION: A structure for the linkage of a duct 1 and a cover 2 has a duct 1 whose top part is opened and in which a piping is installed, a cover 2 which closes the opening of the duct 1 and a linking tool 3 linking the duct 1 and the cover 2. The cover 2 is so formed as to be wider than the duct 1 and, further, both side edges are folded to form folded parts 4. The linking tool 3 has a hook 5 hooked on the folded part 4 and retainers 6 retained with the lower end of the duct 1.