| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cover body for an underground structure, which is devised to suppress the occurrence of rust, and a cover body receiving frame for the underground structure for supporting the cover body. <P>SOLUTION: A cover body 1 for an underground structure includes a metallic iron cover body 11 and an undersurface resin layer 12 provided on the underside of the iron cover body 11 which is an underground side thereof. The undersurface resin layer 12 is formed so that its thickness is 400 μm or more and 3,000 μm or less and the maximum height (Ry) of its surface roughness is larger than 0 μm and 10 μm or less. A receiving frame 5 includes an annularly formed metallic receiving frame body 51 and an inner peripheral resin layer 52 provided on the inner peripheral surface of the receiving frame body 51. The inner peripheral resin layer 52 is formed so that the thickness is 400 μm or more and 3,000 μm or less and the maximum height (Ry) of its surface roughness is larger than 0 μm and 10 μm or less. <P>COPYRIGHT: (C)2013,JPO&INPIT |
