| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover for an underground structure, of which a slip prevention function of a cover surface may be recovered without replacing the cover, at a low cost.SOLUTION: In a cover 1 for an underground structure including a cover body 3 and a receiver frame 5 for supporting the cover body 3 in a way that allows opening/closing, the cover body 3 has an irregular surface 20 for slip prevention formed on both front and rear surfaces thereof, and the receiver frame 5 allows the cover body 3 taken out from a support part 28 at a desired time to be turned over, and then returned onto the support part 28. When the front surface of the cover body 3 wears out, the cover body 3 is turned over to expose the irregular surface 20 for slip prevention on the rear side that has not yet worn, thereby recovering the slip prevention function.SELECTED DRAWING: Figure 4 |
