| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology of preventing noises and bounding by interposing a spacer in a gap caused by mounting of a lid body in a concrete block with a lid comprising a body 2 having a lid receiving part 1 facing upward and a square lid body 3 to be mounted on the lid receiving part 1. SOLUTION: A filling hole 4 is formed at least one part of four corner parts in the longitudinal direction on a contact part of the lid body 3 to be in contact with the lid receiving part 1 facing upward of the body 2 and filler 5 fills the filling hole 4. Thus, the lid body 3 is stably mounted without looseness by interposing the spacer of the filler between the lid receiving part 1 and the lid body 3. COPYRIGHT: (C)2005,JPO&NCIPI
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