Title:
PIPE LINE OF DOUBLE-WALL CORNER TYPE WIRING PIPE, PIPE LINE OF CORNER SHAPE WIRING PIPE, AND METHOD OF ADJUSTING LENGTH OF PIPE LINE OF THE DOUBLE-WALL CORNER TYPE WIRING PIPE
Document Type and Number:
Japanese Patent JP2021158911
Kind Code:
A
Abstract:
To provide a pipe line or the like, of double-wall corner type wiring pipe, capable of preventing damages due to a pressure at a time of an expansion of a water expansion nonwoven fabric while securing a high cut-off performance with a simple structure.SOLUTION: An inner connector 1a includes: a cylinder part 3a which is made of, for example, a resin, and has a helical crest part 7a; and a flange part 5a expanded substantially perpendicularly from a pipe end part of the cylinder part 3a to one end part of the cylinder part 3a. A cross sectional shape of the helical crest part 7a in a direction parallel to a pipe shaft direction of the cylinder part 3a is formed by two faced crest parts 11a so as to be separated from each other by a predetermined distance. A separation wall 9a substantially in parallel to the pipe shaft direction, connecting between the crest parts 11a so as to block a groove 13a formed between the faced crest parts 11a is formed in a predetermined interval, and is formed over an upper part of the groove by connecting both of the crest parts in which a water expansion nonwoven fabric 17a provided to the cylinder part 3a is faced.SELECTED DRAWING: Figure 1
Inventors:
FUJII SHIGETO
OZAWA SATOSHI
SHIROYAMA YUICHI
WATANABE DAISUKE
OZAWA SATOSHI
SHIROYAMA YUICHI
WATANABE DAISUKE
Application Number:
JP2021027836A
Publication Date:
October 07, 2021
Filing Date:
February 24, 2021
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD
International Classes:
F16L5/00; H02G9/06; F16L5/02; H02G1/06
Attorney, Agent or Firm:
Seiichi Inoue