| 摘要 |
PROBLEM TO BE SOLVED: To prevent deformation of a receiving frame due to over-fastening of a fastening nut, in a receiving frame height adjusting device for an underground structure.SOLUTION: A device, which is interposed between a receiving frame for receiving a cover body of an underground structure and a substructure and is for adjusting a height of a receiving frame upper end in accordance with a height of a pavement surface around the installed receiving frame, includes an adjusting nut 20 to be screwed with a plurality of anchor bolts 15 planted on a substructure 13 to adjust the receiving height of a receiving frame 12. The adjusting nut 20 is an integrated object comprising a support part 16 for supporting the receiving frame from a lower part and a cylindrical part 18 having a female screw part 17 to be screwed with the anchor bolt. For the cylindrical part, a height from an upper surface of the support part 16 to an upper end of the cylindrical part 18 is formed slightly larger than the thickness of a flange part of the receiving frame so that the flange part of the receiving frame is not directly fastened by the fastening nut. |
