Title:
【発明の名称】下水・排水管路への光ケーブル布設方法
Document Type and Number:
Japanese Patent JP2851169
Kind Code:
B2
Abstract:
PURPOSE:To prevent the disconnection of the optical fibers in an optical cable by preventing the dirt flowing in a pipeline from hindering water flow without being caught by the optical cable and preventing the elongation of the optical cable by elongation of a coil spring when abnormal tension is applied on the optical cable. CONSTITUTION:The optical cable 15 is passed into the sewerage and drain pipeline 13 within a unit section segmented by impounding inlet chambers 11a, 11b as a pipeline junction container. The optical cable 15 is separated into the coated optical fibers 17 and a tension member 19 in a pipeline port 23. The tension member 19 is tensed by the coil spring 21 and is detained above the pipeline port 23, and the optical cable 15 is laid along the inside surface in the upper half part in the sewerage and drain pipeline 13.
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Inventors:
NAKAZATO TAKUJI
KUROZUMI MITSUHIRO
TAKAHASHI YOSHIFUMI
FUJIHIRA YOSHISADA
OKAZAKI NOBORU
KOMYAMA KATSUHIKO
TAKAHASHI KAZUYO
KUROZUMI MITSUHIRO
TAKAHASHI YOSHIFUMI
FUJIHIRA YOSHISADA
OKAZAKI NOBORU
KOMYAMA KATSUHIKO
TAKAHASHI KAZUYO
Application Number:
JP2137491A
Publication Date:
January 27, 1999
Filing Date:
January 23, 1991
Export Citation:
Assignee:
TOKYOTO GESUIDO SAABISU KK
FURUKAWA DENKI KOGYO KK
FURUKAWA DENKI KOGYO KK
International Classes:
G02B6/46; G02B6/44; G02B6/50; H02G1/06; (IPC1-7): G02B6/46
Attorney, Agent or Firm:
Hiroshi Wakabayashi