| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pit opening/closing structure capable of easily installing a receiving frame obliquely matched with inclination of a road surface by substantially increasing an inclination angle range of the receiving frame to be inserted into a pit by forming a sufficient gap between an insertion part of the receiving frame and the pit. <P>SOLUTION: An opening/closing structure of a pit installed at an upper part of a valve attached to a buried pipe comprises: a receiving frame 5 fitted inside an upper part of a pit 2; a lid 6 fitted to the receiving frame 5; and fixing means 10 for fixing the receiving frame 5 to the pit 2. The receiving frame 5 has an outer side flange 5e larger than an outer diameter of the pit 2 at an upper part and has an insertion part 5a into the pit 2 at a lower part, and a gap (S) for enabling insertion of the receiving frame 5 obliquely into the pit 2 is formed between the insertion part 5a and the pit 2. The fixing means 10 comprises a bolt 8 having such a length that it is screwed to the insertion part 5a and a screw part distal end is projected from an outer peripheral surface of the insertion part 5a, and a retaining projection 9 provided on an outer peripheral surface of the insertion part 5a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
