JP3872137B2 - Branch structure of pipe for optical communication line - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a pipe for optical communication line having a branch portion, to a branching structure of an optical communication line pipe for use when Tsusen the optical cable by Eaburon optical fiber method.
[0002]
[Prior art and problems to be solved by the invention]
Recently, in order to cope with the development of information and communication networks, optical cables are optical cable pipes composed of multiple communicable pipes, or composite cables that combine power cables and other pipes that can be connected to optical cables. A technique has been developed in which a predetermined number of optical cables are routed through the pipes in advance when necessary.
[0003]
On the other hand, as a means for passing the optical cable into the already installed optical communication pipe as described above, a fluid such as compressed air, nitrogen gas, water or the like is pressed into the pipe to pump the optical cable. A so-called air bron optical fiber method has been developed.
However, when the optical cable is routed in the optical passage pipe using the air bron optical fiber method as described above, a branching portion is formed in advance in the optical passage pipe assuming future branching. It is necessary to select and connect branch pipes that are to be connected, which is one of the major issues in the future.
[0004]
[Means for Solving the Problems]
The present invention provides a branching structure for an optical communication pipe that solves the above-mentioned problems. The feature of the present invention is that the branching pipe or the part of the branching part is provided with a blocking means for blocking the communication path to the branching pipe. By operating the blocking means, the branch pipe not to be connected is cut off, and the branch pipe to be connected is selected. In particular, when the blocking means presses the optical cable already connected to the branch pipe not to be connected to the opposite surface of the branch pipe or portion on the side in contact with the opposite surface of the branch pipe or portion in the blocking means, A material that can be easily deformed is provided to such an extent that the existing optical cable is not damaged.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1) FIG. 1 is an explanatory view showing a longitudinal section of an essential part of an embodiment of a branching structure for an optical passage pipe of the present invention.
In the drawing, 1 is a main pipe connected to the branch section 3, and 2 </ b> A and 2 </ b> B are a plurality of branch pipes connected to the branch section 3. A valve 4 is formed in the branch pipe or part 32 of the branch part 3, and the valve 4 has a rotating shaft 41 provided integrally with the valve in a direction perpendicular to the branch pipe or part. At least one end of the rotating shaft 41 is extended to the outside of the branch pipe through a branch pipe penetrating portion provided with an appropriate hermetic sealing means, and the portion extended to the outside of the rotating shaft 41 is, for example, a motor or the like. Driving means is provided, and the valve 4 is moved toward the facing surface 31 of the branch pipe or portion 32 by operating, for example, the optical cable from the end of the optical pipe at the end of the main pipe 1. The communication path 33 of the outer branch pipe 2B is blocked. As a result, the optical cable pressure-fed from the incoming end of the optical cable to the main pipe 1 by the fluid is connected to the connection target branch pipe 2 </ b> A that is opened by riding on the fluid flow. In addition, the drive means of the axis | shaft provided integrally with the valve 4 is arbitrary.
[0006]
In the above, when the valve 4 is closest to the branch pipe or portion facing surface 31, the valve 4 does not need to completely block the communication path 33 in the pipe branch portion 3, so that the optical cable cannot pass, that is, the valve 4. And the branch pipe or portion facing surface 31 only need to be smaller than the outer diameter of the optical cable to be connected.
Further, when an optical cable is already connected to the branch pipe 2B that is not to be connected, the side of the valve 4 that contacts the branch pipe or the part facing surface 31 so that the existing optical cable is not damaged by the valve 4 ( That is, an easily deformable substance such as rubber or sponge is provided at the tip of the valve.
[0007]
(Embodiment 2) FIG. 2 is an explanatory view showing a longitudinal section of an essential part of the next embodiment of the branching structure of the optical communication pipe of the present invention. In the drawing, the same reference numerals as those in FIG. 1 represent the same parts.
As shown in the drawing, the entire branch portion 3 is made of a non-magnetic material such as aluminum, and the branch pipe or portion 32 is made of a magnetic material such as iron and is provided in a direction perpendicular to the branch pipe or portion. And a recess 34a is formed outside the opposing surface 31 of the branch pipe or portion 32, and an electromagnet 5a is installed in the recess 34a. A recess 34b is also provided on the outer side of the other branch pipe or portion facing surface 31, and an electromagnet 5b is installed in the recess 34b. Then, by magnetizing any one of the electromagnets 5a or 5b as needed, the valve 4 provided in the portion 32 is attracted to the branch pipe or the portion facing surface 31 to the branch pipes 2A and 2B in the branch portion 3. The communication path 33 is opened and closed, and a branch pipe to be connected is selected.
In this case, the distance from the branch pipe facing surface 31 when the valve 4 is moved by the electromagnets 5a, 5b installed in the recesses 34a, 34b, rubber, sponge, etc. on the side in contact with the branch pipe facing portion 31. The provision of the easily deformable material is the same as in the first embodiment. The recesses 34a and 34b are provided for convenience in installing the electromagnets 5a and 5b, and the electromagnets 5a and 5b may be installed directly outside the branch portion 3.
[0008]
【The invention's effect】
As described above, according to the branching structure of the optical communication pipe of the present invention, the selection of the branch target pipe can be easily performed in the optical communication pipe having the branching portion. In addition, when the valve shuts off the branch pipe that is not the communication target, the existing optical cable is pressed against the branch pipe or the part facing surface.Therefore, the existing optical cable may become an obstacle at the opening of the branch target pipe. Absent. Therefore, it is extremely effective when the branch structure of the present invention is used for the passage of the optical cable by the air bron optical fiber method to the optical passage pipe having the branch portion.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a longitudinal section of an essential part of a first embodiment of a branching structure for a light transmission pipe of the present invention.
FIG. 2 is an explanatory view showing a longitudinal section of an essential part of a second embodiment of the branching structure of the optical communication pipe of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main pipe 2A branch target branch pipe 2B non-target branch pipe 3 Branch part 4 Valve 5a, 5b Electromagnet

Claims (3)

In the branch portion of the optical communication pipe having the branch portion, a blocking means provided in the branch pipe or portion to block the communication path to the branch pipe ;
Blocking the passing ray exempt branch pipe by the shut-off means, in order to select the wire-passing target branch pipe, comprising a drive means for operating the shut-off means,
The blocking means can be easily deformed to such an extent that the existing optical cable is not damaged when the optical cable already connected to the branch pipe not to be connected is pressed against the opposite surface of the branch pipe or the portion. A branching structure of a pipe for optical transmission line , characterized in that a simple substance is provided on the side of the blocking means that contacts the opposing surface of the branch pipe or portion . Blocking means, the branch pipe also for the part has an axis of rotation in the vertical direction, the optical communication line pipe according to claim 1, characterized in that the face valve from axial to executive direction of the branch pipe branching Structure . An electromagnet is installed outside the branch pipe facing the branch pipe or part .
2. The optical passage pipe according to claim 1 , wherein the shut-off means is a valve made of a magnetic material such as iron , and is driven by operating the electromagnet to shut off the branch pipe not to be passed. Branch structure .

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