| 摘要 |
The present invention relates to a taper type manhole capable of preventing noises and maintaining the original position. The manhole includes: an upper plate which is formed in a square or circular shape corresponding to the manhole, has an upper outer wall extending from the edge of the lower surface in a vertically downward direction, and has an upper inner wall formed on the center of the lower surface to extend in the vertically downward direction; an upper outer taper surface which is formed in the shape of the taper according to the angle of a predetermined slope from the upper surface of the upper outer wall to the outer lower part; a catching groove which is formed to catch an opening jig on the upper outer taper surface to open a manhole cover; and an upper outer round surface which is formed in a round shape according to a predetermined curvature angle and a predetermined curvature radius at the lower side of the upper outer taper surface. |
