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Title:
VINYL CHLORIDE RESIN MANHOLE FOR PIPE WITH VINYL CHLORIDE RESIN RIB AND METHOD OF JOINING PIPE WITH VINYL CHLORIDE RESIN RIB AND VINYL CHLORIDE RESIN MANHOLE
Document Type and Number:
Japanese Patent JPH09195368
Kind Code:
A
Abstract:

To reduce costs by forming ribs on vinyl chloride resin manhole used for pipes with no ribs, allowing different diameters to be substantially in conformity to one another, and joining a vinyl chloride resin pipe with ribs to a vinyl chloride resin manhole.

A manhole 11 is constituted of a cleaning port 12 connected to a manhole, a spigot 13 directed to the downstream direction of a sewer, a socket expanded part 14 arranged in the upstream direction, and a leg part 15. Prepared in its straight pipe part by a reaction injection molding on the spigot 13 is a thermosetting resin member 136 having ribs 131 molded along the circumferential direction. The spigot 13 is also prepared likewise with a second thermosetting resin member 137. In molding, the socket 14 and spigot 13 are used to be an inner mold, and a socket 14 or spigot 13 covering matters are used to be an outer mold. Employing norhornene monomer through ring-opening-polymerization leads to low density and easy reaction injection molding so that good adhesiveness can be achieved relative to the straight pipe part. A rubber ring 133 is mounted between thermosetting resin members 136, 137, and the socket expanded part of the pipe with ribs is fitted thereover to cover them.


Inventors:
MURAI AKIRA
KANEKO AKIRA
Application Number:
JP1996000026233
Publication Date:
July 29, 1997
Filing Date:
January 22, 1996
Export Citation:
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Assignee:
KASEI CO C I
International Classes:
E02D29/12; E03F5/02; (IPC1-7): E03F5/02; E02D29/12
Attorney, Agent or Firm:
加藤 恭介



 
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