Manhole Spacer

Abstract

As shown in the reference diagram indicating the usage state, when a step occurs between a road surface marker such as a manhole cover and the ground, this article is placed between a receiving frame for receiving the road surface marker and a concrete box, and the height of the road surface marker is adjusted to eliminate the step with the ground. Depending on the size of the step between the road surface marker and the ground, two or more of these articles can be stacked and used. As shown in the plan view, bottom view, cross-sectional view taken along line A-A', and cross-sectional view taken along line B-B', this article has a configuration including a total of seven elongated holes, four elongated holes of approximately the same size in a circular annular body and three elongated holes smaller than the four elongated holes and of approximately the same size. With this article placed between the receiving frame of the road surface marker and the concrete box, the article and the receiving frame of the road surface marker are fixed to the concrete box by passing a fastening tool such as a bolt through at least two or more of the seven elongated holes.

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