JPH10110464A - Sewer pipe for passing optical-fiber cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the flow rate of sewage, and to pass an optical-fiber cable easily by integrally molding a duct section, in which sewage is flowed down, and ribs supporting the optical-fiber cable or a sheathed pipe. SOLUTION: A sewer pipe body and support ribs are molded integrally of a synthetic resin, and the support ribs are arranged at deviated places on the top face side at the time of the laying of the sewer pipe with projecting strips for preventing projection. The places of the support ribs are set at the positions of the approximately quarter or less of a sewer pipe diameter from the pipe top of the sewer pipe at that time. A plurality of the sewers are connected to manufacture a duct, and an optical-fiber cable is pushed so as to be slid on a section, on which sewage is flowed from one end of the duct. When the cable reaches the other end side, the cable is lifted at both ends of the duct and placed on the support ribs. A sheathed pipe is passed similarly into the sewer even when the sheathed pipe is used. Accordingly, cable passing works can be conducted easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewer pipe having a cable storage function for an optical fiber cable or the like.

[0002]

2. Description of the Related Art In recent years, proposals have been made to lay an information network using an optical fiber cable by using a sewer installed underground.

[0003] As a corresponding sewer pipe, there has been proposed a sewer pipe in which a partition is provided in the sewer pipe and a part where the sewer flows and an optical fiber cable is routed and stored.

[0004]

However, in order to secure the flow rate of sewage, the portion for accommodating the optical fiber cable must be reduced.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a sewer pipe capable of ensuring a sufficient flow rate of sewage and facilitating the passage of an optical fiber cable.

[0006]

The present invention has the following configuration to achieve the above object. That is,
A configuration is characterized in that a pipe portion through which sewage flows down and a rib for supporting an optical fiber cable or a sheath tube are integrally formed on the inner surface of the sewer pipe.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a drain pipe 1 according to the present invention. The drain pipe 1 includes a drain pipe main body 2 and a support rib 3.
And is constituted by. The sewage pipe main body 2 and the support rib 3 are integrally formed by extruding a synthetic resin such as hard vinyl chloride.

The shape of the support rib 3 has a protrusion for preventing protrusion. The support rib 3 is provided at a position deviated to the upper surface side when the sewer pipe is laid. The position of the support rib 3 is provided from the top of the sewer pipe to 1/4 of the diameter of the sewer pipe.

The support rib 3 is not limited to the one shown in FIG. 1, and it is sufficient that the optical fiber cable 4 does not fall off the support rib 3, and the support rib 3 bends toward the upper surface when the sewer pipe is laid as shown in FIG. It does not matter.

A method of passing the optical fiber cable 4 through the sewer pipe 1 of the present invention will be described.

After connecting a plurality of sewer pipes 1 to form a pipe, the optical fiber cable 4 is pushed in from one end of the pipe so as to slide a part where the sewer originally flows (bottom part of the pipe). When the optical fiber cable reaches the other end, the optical fiber cable is lifted at both ends of the pipe and is placed on the support ribs 3.

Further, even if the optical fiber cable 4 is not directly slid, the pull-in cable is previously mounted on the support rib 3 by the same method as described above, and then the cable to be pulled in is connected to the end of the optical fiber cable, and The optical fiber cable 4 may be slid over the cable 3.

Furthermore, the direct optical fiber cable 4
Can be connected to the drain pipe 1 in a similar manner even when a sheath pipe is used without passing through the drain pipe 1.

[0014]

As described above, in the sewer pipe according to the present invention, when the wire is passed, the wire is originally passed through the portion where the sewage flows, and thereafter, the optical fiber cable can be mounted on the support rib. Therefore, since it is not necessary to pass through a narrow space, the passing operation becomes easy.

[Brief description of the drawings]

FIG. 1 is a sectional view of a drain according to the present invention.

FIG. 2 is a sectional view of another sewer pipe according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 sewage pipe 2 sewage pipe main body 3 support rib 4 optical fiber cable

Claims (1)

[Claims] 1. A sewer pipe characterized in that a rib for supporting a cable is provided on the inner surface of the sewer pipe main body so as to be deviated toward the upper surface side when being laid and integrally formed.