| 摘要 |
PROBLEM TO BE SOLVED: To provide a hinge device of an opening part cover for an underground space structure for easily inserting a hinge tool into a receiving seat, without being hindered by the existence of an intermediate cover, even if the hinge tool is sufficiently lengthened, in a hinge device of a manhole.SOLUTION: A receiving seat 6 on the receiving frame 4 side overhangs to the inside from an inner peripheral surface of a receiving frame 4, and comprises a long hole 16 long in the radial direction of the receiving frame 4. A hinge tool 5 on the opening part cover 2 side is a rod-like member vertically movably and rotatably inserted into the long hole 16 of the receiving seat 6, and is composed of an upper shaft part 17 and a lower shaft part 18, the upper end of the upper shaft part 17 is rotatably installed in an undersurface peripheral edge part of an opening part cover 2, the upper end of the lower shaft part 18 is rotatably installed on the inside on the lower end of the upper shaft part 17, and in a state of inserting the hinge tool 5 into the long hole 16 of the receiving seat 6, the lower shaft part 18 can be bent to the inside under the receiving seat 6. |
