Title:
PIPE COUPLING AND METHOD OF USING THE SAME
Document Type and Number:
Japanese Patent JP2023025744
Kind Code:
A
Abstract:
To provide a pipe coupling having fire-resistance.SOLUTION: A pipe coupling 1 includes: an inner pipe 10 made of synthetic resin, in which drainage flows down from an upper end part to a lower end part and into which drainage flows from at least one lateral branch pipe connection part provided so as to overhang laterally from a side surface; and an outer pipe 20 made of fiber mortar, which covers the inner pipe 10. The outer pipe 20 includes: a first covering part 210 provided fixedly to the inner 10; and a second covering part 220 provided movably with respect to the inner pipe 10. The second covering part 220 is cylindrical and further covers a part of an outer peripheral surface of a cylinder part 142 excluding a region of a connection margin on a lower end part side. The first covering part 210 covers a region on an upstream side, which is not covered by the second covering part 220 in a flow-in part and an outer peripheral surface of a lower extending part 140 connected to the flow-in part. Further, the second covering part 220 is held to the cylinder part 142 of the inner pipe 10 via at least one elastic annular material interposed between itself and the cylinder part 142 of the inner pipe 10.SELECTED DRAWING: Figure 2
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Inventors:
KOYAMA TAMAKI
Application Number:
JP2021131051A
Publication Date:
February 24, 2023
Filing Date:
August 11, 2021
Export Citation:
Assignee:
FUNEN AKUROSU KK
International Classes:
E03C1/12; E04B1/94; F16L5/04