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1. 发明专利

JPH0813523A MANHOLE JOINT 失效
公开(公告)号：JPH0813523A
公开(公告)日：1996-01-16
申请号：JP16329894
申请日：1994-06-23
申请人： KOWA KASEI , TEIHIYUU KK
发明人： KUMEHARA HIROSHI , SHIYOUJI HIROATSU , MURAOKA TAKAHIRO , TAKEMOTO TOMOHIRO
IPC分类号： E02D29/12 , F16L5/02
摘要： PURPOSE:To seal water in a highly reliable manner by fitting a ring in a gap between the inner circumferential surface of a main mounting hole and the outer circumferential surface of a main, and enlarging a ring groove installed in an end face of this ring with a pipe piece or the like. CONSTITUTION:A ring 11 made of flexible material is fitted in a gap between the inner circumferential surface of a main mounting hole 4 of a manhole 3 and the outer circumferential surface of a main 5. In addition, pipe pieces 35 plurally divided in the circumferential direction are set up in a ring groove 31 formed in an end face 30 of this ring 11. In succession, a nut 43 screwed in a bolt 17 is screwed therein, whereby these pipe pieces 35 are pushed forward via two pipe keep plates 37 and 37', and thus the ring groove 31 is enlarged as specified. If so, the ring 11 is pressed to an interval between the inner circumferential surface of the main mounting hole 4 and the outer circumferential surface of the main 5, sealing a gap between both of them. With this sealing, even in the case where there is eccentricity between the main mounting hole 4 and the main 5, an overhanging quantity of the ring 11 is partially adjustable, so water is sealable in a highly reliable manner.

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