Pipe rehabilitation method
AssigneeShonan Gosei-Jushi Seisakusho K.K.
InventorsTakao Kamiyama, Makoto Ishida
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Abstract
Segments each having side plates 102 and 103 and a plurality of inner plates 106 and 107 inside the side plates are coupled in the circumferential direction and in the longitudinal direction to construct a rehabilitation pipe inside an existing pipe. A plastic nut retainer 50 for retaining therein a nut 60 engaged with a coupling bolt 11 is attached between the side plate 102 on one side of the segment 1b and the inner plate 106 adjacent thereto. The coupling bolt is screwed into the nut to couple the segments 1a and 1b in the longitudinal direction due to clamping by screwing. A groove is formed in the nut retainer, and the nut is press-fitted into the groove and retained in the nut retainer.
Claims7
A pipe rehabilitation method in which segments are coupled in the circumferential direction and in the longitudinal direction to construct a rehabilitation pipe inside an existing pipe, each of the segments having an inner surface plate, side plates provided upright on both sides of the inner surface plate and a plurality of inner plates provided upright on the upper surface of the inner surface plate inside the side plates, the method comprising:
- attaching between the side plate of one segment and the inner plate adjacent to the side plate a plastic nut retainer that retains a not inside and has a hollow portion through which a coupling bolt passes to screw into the nut;
- aligning the one segment with the other segment coupled to the one segment in the longitudinal direction;
- and
- screwing the coupling bolt into the nut to couple the one segment with the other segment in the longitudinal direction,
- wherein the nut retainer is provided with a groove that extends in a direction perpendicular to the hollow portion, the nut being press-fitted into the groove and retained in the nut retainer.
Dependencies are inferred from the claim text.