JP2003241046A - Optical line housing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical line housing structure in which an optical line is easily laid down and easily branched along the way of the laying. <P>SOLUTION: The optical line housing structure is characterized in the fact that the structure has a pipe line 1, a cover 2 which is tightly fitted on the outer surface of the pipe line 1, and a fixing means 5 which fixes the tightly fitted state of the pipe line 1 and the cover 2, and an optical cable 4 (or a coated optical fiber or the like) is housed in the cover 2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical line storage structure for laying an optical cable or the like using a conduit.

[0002]

2. Description of the Related Art For laying an optical line composed of an optical cable or the like, there is a means such as arranging inside the sewer pipe or in parallel with it.
Sewage pipes are laid down to each house, etc., and the purpose is to facilitate the laying of optical cables. As a sewer pipe structure used in such a case, JP-A-10-204970, JP-A-10-77677,
For example, there are those described in Japanese Patent Laid-Open No. 10-110863. As shown in FIG. 7, the structure described in Japanese Patent Laid-Open No. 10-204970 is a structure in which a pipe 20 for an optical line is integrally connected to the outside of the sewer pipe 1. As shown in FIG. 8, the structure described in Japanese Patent Application Laid-Open No. 10-77677 is such that a partition 21 is attached above the inside of the sewer pipe 1 to form a space for an optical line. The structure described in JP-A-10-110863,
As shown in FIG. 9, a pipe 22 for passing an optical cable is attached inside the sewer pipe 1.

[0003]

Conventionally, an optical line constructed by an optical cable or the like has been used only for a trunk line, and a metal line has been used for each home. However, in recent years
Against the backdrop of the dramatic increase in information communication volume, FTTH (Fiber To
The Home) has been advocated, and the movement to install optical wiring to each home is being promoted. In FIG. 10, as an example of installing optical cables to each home by using a sewer pipe or the like, a mounting pipe 101 is branched from the sewage main pipe 100 of an optical line toward each home, and optical cables are laid inside the branch pipe. The situation is shown.

Inside the main pipe 100, main line optical cables 103 (solid lines) for connecting the connection points 102 together with optical cables 104 (dotted lines) for leading in to each home will be arranged, and for leading in. The optical cables 104 are the mounting tubes 10
1 is connected to the terminal 105 of each home. It should be noted that the term “optical cables” as used herein includes all optical wiring forms such as an optical fiber cord reinforced and coated with an optical fiber core and the optical fiber core itself, in addition to the optical cable (the same applies hereinafter).

The above-described optical line structure shown in FIGS. 7 to 9 is intended to be used as an optical wiring of a trunk line as in the past. It was not considered to branch a large number of optical cables to each home, and it was difficult to use for branching to each home. For example, the structure of FIG.
In order to take out the optical cables inside the tube 20, it is necessary to form an opening in the tube 20 to find a desired cable from the inside optical cables and draw it out. The openings must be perforated so as not to damage the internal cables, and it is difficult to find the desired optical cables. It is also necessary to connect the mounting pipe 101 of FIG. 10 and the like to the pipe 20. Although the structure of FIG. 8 and FIG. 9 is also the same, since the optical cables are laid inside the sewer pipe 1, an opening must be provided in the sewer pipe 1, which is a more difficult work.

In the case of a sewer pipe, a concrete pipe material called a PVC pipe or a fume pipe is used, but providing an opening in the sewer pipe 1 itself is a large-scale work. Also, it is thought that optical cables used only for the trunk line will rarely be replaced or switched, but in consideration of branch wiring to each household, replacement of optical cables once laid and connection switching will occur. Must be done. However, the structure shown in FIGS. 7 to 9 is a structure that is not considered for repair after being laid once, and is also difficult to use from this point.
For this reason, it is difficult to perform branch wiring of the optical line in the conventional structure, and further improvement has been demanded.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an optical line housing structure which facilitates the laying of a large number of optical lines and also allows the optical lines to be branched.

[0008]

According to a first aspect of the present invention, there is provided an optical line housing structure comprising: a conduit, a cover closely attached to an outer surface of the conduit, and a fixing means for fixing the tight contact between the conduit and the cover. And has an optical cable (which may be an optical fiber cord) or an optical fiber core wire housed in the cover.

According to a second aspect of the present invention, there is provided an optical line housing structure in which a conduit, a cover closely attached to the outer surface of the conduit, a fixing means for fixing the tight contact between the conduit and the cover are accommodated in the cover. , And an optical cable (which may be an optical fiber cord) or a pipe for accommodating the optical fiber core wire.

According to the invention of claim 1 or 2, in the optical line housing structure described in claim 3, when the pipeline is an existing pipeline, the fixing means is a separate member on the outer surface of the pipeline. It is characterized in that it is composed of a fixed protrusion, a protrusion formed on the cover, and a claw that locks the protrusion.

According to a fourth aspect of the invention, there is provided the optical line housing structure according to the first or second aspect, wherein the fixing means is a binding band.

According to a fifth aspect of the present invention, in the optical line housing structure according to the first or second aspect, the cover is an optical cable (which may be an optical fiber cord) or an optical fiber core wire, or these. It is characterized by having a holding member for holding the pipe to be stored therein.

According to a sixth aspect of the invention, there is provided the optical line housing structure according to the first or second aspect, wherein the pipe is made of a polyethylene material.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an optical line housing structure of the present invention will be described with reference to the drawings. 1 and 2 show the first embodiment. FIG. 1 shows a plane that is perpendicular to the extending direction of a pipe line (which will be simply referred to as a sewer pipe in the present embodiment because it is a sewer pipe in the present embodiment) 1 that is used when accommodating an optical line. FIG. FIG. 2 is a side view of the sewer pipe 1 described above as viewed from the side. The drain pipe 1 of this embodiment is made of vinyl chloride, and a pair of protrusions 5a is integrally formed on the outer surface thereof. The protrusion 5 a is formed along the longitudinal direction of the sewer pipe 1 over the entire length of the sewer pipe 1. The pair of protrusions 5a are respectively arranged so as to face opposite directions in the cross section of FIG.
Is formed toward the outer side of.

A cover 2 is attached to an upper portion of the sewer pipe 1 (a portion which is an upper side when the sewer pipe 1 is laid). Here, the cover 2 is also made of PVC. The cross section of the cover 2 is
It has a trapezoidal shape with no bottom. The pair of lower end edges of the cover 2 are respectively formed with the claw portions 5b that engage with the above-mentioned protrusions 5a. The claw portion 5b is formed over the entire length of the cover 2 along the longitudinal direction of the cover 2. In the cross section of FIG. 1, the pair of claw portions 5b are formed toward the inside of the cover 2 so as to face each other.

When the cover 2 is pressed against the sewer pipe 1 from above, the cover 2 slightly bends to widen the interval between the lower ends thereof, and the protrusions 5a and the claws 5b are engaged with each other. That is, the protruding portion 5a and the claw portion 5b constitute a fixing means for fixing the cover 2 to the sewer pipe 1. By constructing such a fixing means, the cover 2 can be attached and detached very easily, and the inside of the cover 2 can be easily sealed.

A plurality of pipes 3 are housed inside the cover 2. Inside each pipe 3, an optical cable 4
Is stored. In addition to the optical cable 4, all the optical wiring forms such as an optical fiber cord reinforced and coated with the optical fiber core and the optical fiber core itself can be housed inside the pipe 3. Hereinafter, these are collectively referred to as “optical cables”. The plurality of pipes 3 are held on the inner surface of the cover 2 by fixing both ends of the holding member 6 to the inner surface of the cover 2. The holding member 6 is
It is formed by bending a metal wire and is attached to the inner surface of the cover 2 at regular intervals.

Thus, the pipe 3 is housed inside the cover 2, and the optical cables are housed inside the cover 2, so that the method of laying the optical cables with compressed air can be easily dealt with. You can
In this case, by feeding the optical cables to be laid inside the pipe 3 and the compressed air, the optical cables can be laid inside the pipe 3 by utilizing the compressed air flow. At this time, the material of the pipe 3 is preferably a polyethylene material. This material reduces friction between the inner surface of the pipe 3 and the coating of the optical cables when laying the optical cables, and facilitates laying the optical cables.

By adopting the above-mentioned optical line housing structure, it is possible to easily branch the optical line. That is, by attaching the detachable cover 2 to the outside of the sewer pipe 1 and storing the optical cables inside the cover 2, it is possible to easily remove the cover 2 and branch a desired optical fiber at the time of branching work. You can do it. Also, it is easy to find the optical fiber to be branched. Furthermore, the cover 8 of the attachment pipe (branch pipe) connected to each home at the time of branching need only be attached to the cover 2 (the sewer pipe 1 itself does not need to be processed),
The connection is also easy to make.

The structure of the branched portion is shown in FIG. As shown in FIG. 3, here, one optical cable 4 in one pipe 3 is branched from the main line. At this time, a hole is made in the side surface of the cover 2, and the cover 8 of the branch mounting pipe is connected to the hole. Since the cover 2 can be attached and detached, it is easy to perforate. Since the cover 2 of the present embodiment is made of vinyl chloride, it is easier to perforate. The cover 8 of the mounting pipe is fixed to the upper part of the mounting pipe 7 of the sewer pipe 1 itself. At the connecting portion between the main pipe and the mounting pipe, a support member 10 is arranged between the cover 8 and the mounting pipe 7 as needed to stabilize the cover 8.

Inside the cover 8 for the mounting pipe, a branch pipe 9 similar to the pipe 3 is arranged. The branch pipe 9 is connected to the pipe 3. Then, one optical cable 4 is branched from the pipe 3 toward the branch pipe 9. A mechanism for switching the connection path by compressed air at the connection portion between the branch pipe 9 and the pipe 3 (switching between the back side of the paper in FIG. 3 → the path to the branch pipe 9 and the front side of the paper → the path to the branch pipe 9) is incorporated. Then, it is also possible to lay optical cables from the inside of the pipe 3 to the branch pipe 9 by using compressed air. Without providing such a switching mechanism, at the time of branching work, manually connect the wiring at this connection side to the back side of the paper → the branch pipe 9, the front side of the paper → branch pipe 9, the back side of the paper ← → the front side of the paper. You can set it with.
Further, in the structure of FIG. 3, the optical cables branched from the pipe 3 may be directly housed inside the mounting pipe 8 without providing a member such as the branch pipe 9.

FIG. 4 shows a second embodiment. In this embodiment, there is no member corresponding to the pipe 3 in FIG. 1, and the optical cable 40 is directly held by the holding member 6. Even with such a structure, it is not possible to lay the optical cable 40 using compressed air, and the branching work can be easily performed as described above.

FIG. 5 shows a third embodiment. In the present embodiment, in order to form the protrusion 5a on the outer surface of the sewer pipe 1, an adapter 11 having a pair of protrusions 5a is prepared as a separate member and fixed to the outer surface of the sewer pipe 1. ing. In this embodiment, the adapter 11 is fixed to the drain pipe 1 by an adhesive. Moreover, even if the sewer pipe 1 is a concrete fume pipe, if an appropriate adhesive is selected, the adapter 1 is formed in such a form.
It is also possible to fix 1 on the outer surface of the sewer pipe 1.

In particular, this form is effective when constructing the optical line housing structure of the present invention using an existing sewer pipe. Since the existing sewer pipe 1 does not have the projection 5a formed in advance, it is necessary to realize the fixing means of the cover 2 by using some means, but by preparing such an adapter 11, it becomes easy. The optical line storage structure of the present invention can be constructed. Also, in this case, before laying the optical line,
The adapter 11 functions as a lid part of the cover 2.

FIG. 6 shows a fourth embodiment. In the present embodiment, the fixing means for fixing the cover 2 to the sewer pipe 1 is constituted by the binding band 50 instead of the above-described structure composed of the protrusion 5a and the claw 5b. The binding band 50 is attached at predetermined intervals along the longitudinal direction of the sewer pipe 1 so that the cover 2 is brought into close contact with the outer surface of the sewer pipe 1. The form in which such a binding band 50 is used as a fixing means is also effective when constructing the optical line storage structure of the present invention using an existing sewer pipe. That is,
Since the sewer pipe 1 itself does not require a portion such as the protruding portion 5a that constitutes the fixing means, it is possible to use the existing equipment as it is.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment of FIG. 3, the situation in which one optical cable 4 is branched from the main line is shown, but a plurality of optical cables may be branched, and a part of the optical cable in the optical cable may be branched. It is possible that only the fiber cord or the optical fiber core wire is branched. Also,
In the above-described embodiment, the case where the pipeline used when laying the optical line is the sewer pipe 1 has been described as an example, but it is also possible to use a pipeline other than the sewer pipe. In particular,
A water supply pipe or a gas pipe can be used as the conduit 1. Further, the conduit 1 may be made of a material other than PVC (such as concrete for fume pipe).

[0027]

According to the optical line housing structure of the present invention, the optical cables are housed inside the cover which is in close contact with the outer surface of the conduit, thereby facilitating the installation of the optical path and at the time of installation. It is also possible to easily branch the optical line.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a first embodiment of an optical line storage structure of the present invention.

2 is a side view of the optical line housing structure of FIG. 1. FIG.

FIG. 3 is a cross-sectional view of a second embodiment of the optical line storage structure of the present invention.

FIG. 4 is a cross-sectional view of a third embodiment of the optical line storage structure of the present invention.

FIG. 5 is a cross-sectional view of a fourth embodiment of the optical line storage structure of the present invention.

FIG. 6 is a sectional view of a fifth embodiment of the optical line storage structure of the present invention.

FIG. 7 is a cross-sectional view of a conventional optical line storage structure (first example).

FIG. 8 is a sectional view of a conventional optical line storage structure (second example).

FIG. 9 is a cross-sectional view of a conventional optical line storage structure (third example).

FIG. 10 is an explanatory diagram showing a state of FTTH.

[Explanation of symbols]

1 ... sewer pipe (pipe line), 2 ... cover, 3 ... pipe, 4, 4
0 ... Optical cable, 5 ... Fixing means, 5a ... Projection part (fixing means), 5b ... Claw part (fixing means), 6 ... Holding member, 7 ... Mounting tube, 8 ... Mounting tube cover, 9 ... Branch pipe, 10 ... Support material, 11 ... Adapter, 50 ... Binding band (fixing means).

Claims (6)

[Claims] 1. A pipe, a cover closely attached to an outer surface of the pipe, and a fixing means for fixing a close contact state of the pipe and the cover, wherein an optical cable or an optical fiber core is provided in the cover. An optical line storage structure characterized in that lines are stored. 2. A conduit, a cover in close contact with the outer surface of the conduit, a fixing means for fixing the adhered state of the conduit and the cover, and an optical cable or an optical fiber core housed in the cover. An optical line storage structure having a pipe for storing a line. 3. When the pipeline is an existing pipeline, the fixing means engages with a protrusion fixed to the outer surface of the pipeline as a separate member and the protrusion formed on the cover. The optical line storage structure according to claim 1 or 2, comprising: 4. The optical line storage structure according to claim 1, wherein the fixing means is a binding band. 5. The cover according to claim 1 or 2, wherein the cover has a holding member for holding the optical cable or the optical fiber core, or the pipe accommodating the optical cable and the pipe therein. The described optical line storage structure. 6. The optical line storage structure according to claim 2, wherein the pipe is made of a polyethylene material.