| 摘要 |
PROBLEM TO BE SOLVED: To provide an underground structure housing in which an outer cylindrical body and an inner cylindrical body can be easily fixed at a desired height position in such a manner that a top face of a lid body is matched to a height of a road surface, double nut effects are surely retained and backlash can be prevented.SOLUTION: The underground structure housing comprises an outer cylindrical body 2 with which a female screw part 2d is formed on the inner circumferential surface thereof, and an inner cylindrical body 3 with which male screw parts 4d, 5d which can be threaded to the female screw part 2d in the outer cylindrical body 2 are formed on the outer circumferential surface thereof. The inner cylindrical body 3 is formed from an upper cylindrical body 4 and a lower cylindrical body 5, and the male screw parts 4d, 5d are formed on the outer circumferential surfaces of the upper cylindrical body 4 and the lower cylindrical body 5. A lower end face of the upper cylindrical body 4 and an upper end face of the lower cylindrical body 5 are brought into contact with each other while having non-horizontal portions 4x, 5x. |
