KR100289620B1 - Intermediate branch connection method of optical fiber cable - Google Patents

Abstract

The present invention relates to an intermediate branch connection method of an optical fiber cable, and when the intermediate branch connection is implemented, it is implemented to secure the length of the branch core in a straight line cable having no loop portion. To be connected in the form of loop with the feeder core of the feeder cable, and when it is used in the star branch, the branch core of the branch cable can be connected with the feeder core of the feeder cable and star-shaped straight line. A first step of removing the cable sheaths of the two portions by a predetermined length by setting an auxiliary connection portion at a position spaced apart from the branch connection portion by a predetermined distance in a straight line optical fiber cable; A second step of forming the first and second branch fiber cores by drawing and cutting a predetermined amount of the branch fiber cores from the branch connection part; A third step of connecting the cut first optical fiber core wire to the first branch optical fiber core of a branch cable, and connecting the second branch optical fiber core to a second branch optical fiber core of a branch cable at the branch connection part; A fourth step of connecting the first branch fiber core and the first branch fiber core at the branch connection part; And a fifth step of drawing out a connection portion between the first branch fiber core and the first branch fiber core to the auxiliary connection side.

Description

Intermediate branch connection method of optical fiber cable

The present invention relates to an intermediate branch connection method of an optical fiber cable for branching a core cable at an intermediate point of an optical fiber cable section to which a loop wiring method or a star wiring method is applied in the configuration of an optical fiber network. In order to draw out, the intermediate branch connection part and the intermediate branch auxiliary connection part are implemented so that the intermediate branch connection can be performed without securing the connection location of the feeder cable. The present invention relates to an intermediate branch connection method of an optical fiber cable with improved operability and economy.

In general, the optical fiber network is configured in the form of a loop wiring method, a star wiring method, etc. in consideration of the diversification of services and adaptability to quantitative changes of services, reliability of equipment, and economical efficiency. As shown in the figure, a cable gown for branch connection is secured in advance on artificial or electric poles (1, 2, 3, 4, 5, 6) where branching is expected when new cables are installed. The branch cable is installed from the point where the demand is generated to the branch point of the loop wiring network, and only the branch fiber core (hereinafter referred to as "; branch line core") in the branch cable formed of the loop wiring network is called the branch fiber of the branch cable. Loop wires are constructed by connecting the core wires (hereinafter referred to as "branching core wires") in left and right directions.

In addition, in the star wiring method, as shown in FIG. 1B, the branch prediction point is selected when the optical fiber cable is newly installed, and then secured on the artificial or pole (1, 2, 3, 4) by securing the connection length of the optical cable for branch connection. If core lead occurs during operation, install a branch cable from the point where the core lead occurs to the branch point of the star wiring network, and connect only the branch core in the branch cable consisting of the star network with the branch core. Build a fiber optic network.

In the construction of the optical fiber network as described above, the branching to the point where the core seam is generated is the branching point connection which is branched at the connection point of the cable constituting each line network, and is branched at the intermediate point of the cable, not the connection point. There is an intermediate branch connection.

On the other hand, when the interconnection between the optical fiber core wire is not directly applied to the tension of the optical fiber connection, and responds to the request for reconnection due to the failure or failure of the connection or operational needs, and to minimize the distance from the connection to the connection device Since the fiber core length must be secured, the intermediate branch connection must secure a connection length for branch connection.

In the intermediate branch connection method of the optical fiber cable according to the prior art which requires the connection length as described above, the branched optical fiber cable (from the conduit 10 in the artificial (a) at the intermediate branch connection position as shown in Fig. 2A). 20) is pulled to support the cable support 30, and then make a loop portion to secure the railing. At this time, the artificial (a) is a branch optical fiber cable 40 to be connected to the core of the branched optical fiber cable 20 is located. And, as shown in Figure 2b, after fixing the cable of the connection length to the cable support portion (30a), after marking the outer skin stripping point on both sides of the loop portion of the cable in the outer skin stripping point so that the optical fiber core wire is drawn out The intermediate branch connecting portion (c) is formed by removing the shell. The junction box is mounted to the part where the outer shell is removed.

On the other hand, when the cable length cannot be secured or the cable length is not secured in the artificial place where the demand for the intermediate branch connection occurs, as shown in FIG. 3, the branch cable 40 is placed near the intermediate branch connection artificial a. The connection point branch is installed up to the artificial branch (b), and the connection portion 50 is disassembled to perform the connection point branch connection for branching the branch cable 40 from the branch cable 20. At this time, up to 500m branch fiber optic cable should be added for the junction.

However, in the above-described intermediate branch connection method of the optical fiber cable, various problems as described below occur in terms of economics, operability, and workability of the optical cable facility for the efficient construction of the optical fiber network.

First, when the optical cable is newly installed, the operator cannot select the branch prediction point correctly, so the cable length is excessively secured or the cable length reserved for the intermediate branch connection is insufficient. Cables are required to be installed, which adds to the cost of additional cables.

Second, if the worker incorrectly selects the branch prediction point, it is necessary to release the length secured in the optical line section and pull it to the point where the intermediate branch occurs or to install the branch cable to the place where the branch connection length is secured. The cost is added.

Third, the connection length secured at the point where the intermediate branch is generated is low in workability because the differentiation cores must be set to a length that can be accommodated in the junction box.

Fourth, it takes considerable time because the outer sheath of the cable must be cut and removed in the transverse and longitudinal directions so that only the divergence core can be cut at the intermediate branch connection without cutting the intermediate core as long as the secured length of connection. .

Fifth, it is difficult to arrange the optical fiber core unit in the junction box because the optical fiber core unit in which the differentiation cores are accommodated must be kept within the junction box using hard polybutadiene terephthalate (PBTP). The reliability of the optical fiber core in the differentiator unit in which the optical fiber core is being received is reduced.

Sixth, the artificial interior is considerably complicated by the connection route secured in the artificial, and the connection route secured on the pole not only impairs aesthetics but also lowers the reliability of the cable.

Accordingly, the present invention has been made to solve the above problems, and when the intermediate branch connection, the present invention is implemented to secure the length of the branch core in the straight cable without the loop portion, the branch cable in the loop wiring method An object of the present invention is to provide an intermediate branch connection method of an optical fiber cable in which branch cores are connected to the branch cores of the branch cable in a loop form.

In addition, when used in the star branch, there is another object to provide an intermediate branch connection method of the optical fiber cable in which the branch core of the branch cable can make a straight line connection with the branch core of the branch cable.

1A and 1B are diagrams showing a wiring method of a general optical fiber network.

Figure 2a and 2b is an embodiment showing an intermediate branch connection method of the optical fiber cable according to the prior art.

FIG. 3 is a state diagram of a branch fiber optic cable for connecting point divergence from the intermediate branch connecting artificial of FIG. 2A; FIG.

Figure 4 is a block diagram showing the intermediate branch connection position located in a straight line in the intermediate branch connection method of the optical fiber cable according to the present invention.

5 is a view showing the removal position of the optical fiber cable sheath for outflow of the fiber optic core in the intermediate branch connection method of the optical fiber cable according to the present invention.

Figure 6a to 6i is a first embodiment of the intermediate branch connection method of the optical fiber cable according to the present invention.

Fig. 7 is a diagram showing the arrangement of the branched and branched optical cables after completion of the intermediate branch connection according to the first embodiment of the present invention.

8a to 8g are second embodiment of the intermediate branch connection method of the optical fiber cable according to the present invention.

Fig. 9 is a diagram showing the arrangement of the branched and branched optical cables after completion of the intermediate branch connection according to the second embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: pipeline 20: branch fiber optic cable

30: cable support 40: branch cable

50: connection 60: branch core

70: differentiation core 80: unit spiral

a: artificial e: branch connection

f: auxiliary connection

In order to achieve the above object, the present invention, the first connection to remove the cable jacket of the two parts by setting the branch connection portion in a straight line and the auxiliary connection portion at a position spaced apart from the branch connection portion by a predetermined distance. step; A second step of forming the first and second branch fiber cores by drawing and cutting a predetermined amount of the branch fiber cores from the branch connection part; A third step of connecting the cut first optical fiber core wire to the first branch optical fiber core of a branch cable, and connecting the second branch optical fiber core to a second branch optical fiber core of a branch cable at the branch connection part; A fourth step of connecting the first branch fiber core and the first branch fiber core at the branch connection part; And a fifth step of drawing out a connection portion between the first branch fiber core and the first branch fiber core to the auxiliary connection side.

In addition, the present invention provides a first step of removing the cable jacket of the two parts by a predetermined length by setting the branch connection portion in the straight line optical fiber cable and the auxiliary connection portion at a position spaced apart from the branch connection portion by a predetermined distance; A second step of forming the first and second branch fiber cores by drawing and cutting a predetermined amount of the branch fiber cores from the branch connection part; A third step of installing a hollow body having a predetermined length on the auxiliary connection side; A fourth step of pulling the first branch optical fiber core wire and placing it on the auxiliary connection part side, and passing the first branch optical fiber core wire of the branch cable through the hollow body and placing it on the auxiliary connection part side; And a fifth step of connecting one end portion of the first branch optical fiber core wire penetrating the first branch optical fiber core wire and the hollow body.

Hereinafter, an intermediate branch connection method of an optical fiber cable according to the present invention will be described in detail with reference to the accompanying drawings. Use drawing numbers.

First, in the present invention, as shown in Figs. 4 and 5, the cable support portion 30a of the cable support 30 to the feeder cable 20 introduced into the conduit 10 in the intermediate branch connection point artificial (a) After the fixing, the outer shell of the branch connection portion (e) by the length of the branch junction box at the middle point of the branched cable 20 in a straight line, and the auxiliary connection portion for the auxiliary connection to one side of the branch connection portion (e) (f), but the auxiliary connector (f) to remove the outer shell by the length of the auxiliary junction box.

Then, in the first embodiment of the present invention, it is possible to perform the intermediate branch connection of the loop wiring method by using the method of sending the branch core wire of the branch cable from the branch connection part to the auxiliary connection part, as shown in FIG. 6A. As described above, the sheath of the branch connection part e and the auxiliary connection part f formed at one side section of the branch connection part e are separated from each other by the length corresponding to each junction box. Then, a predetermined portion is cut out of the core wire of the branched optical fiber core unit (hereinafter referred to as "the branch unit") 20a of the branch connection portion e. At this time, the cut portion is the branching core 60, the remaining portion is the branching core (70).

Accordingly, as shown in FIG. 6B, the branch line 60 is divided into a first branch line 60a on the side of the auxiliary connecting portion and a second branch line 60b located on the opposite side of the auxiliary connecting portion. Here, the worker pulls out the branch core wire consisting of the first branch core wires and the second branch core wires 40a and 40b from the branch cable 40 located on the branch connection part side, and then connects the first branch core wire 60a with the first branch core wire 60a. The first branch core 40a is connected to form a temporary connection part g.

Then, when the first branch core 60a is pulled from the auxiliary connecting side, the first branch core 60a, the first branch core 40a and the temporary connecting portion g are drawn out from the branch connection to the auxiliary connecting side. In the state where the first branch core 40a is drawn out to the auxiliary connection side, the temporary connection part g is disassembled (see FIGS. 6C and 6D).

Subsequently, the worker wraps and protects the diverging cores 70 of the branching unit 20a with a unit spiral 80 at the branch connection and the auxiliary connection (see FIG. 6E), and the optical fiber corresponding to the branch connection and the auxiliary connection. After attaching the core wire protective support plates, i.e., the trays 11 and 12, respectively, the second branch core 60b, the second branch core 40b and the extra first branch cores ( 40a) are rolled up so that a volume becomes small, and the 1st branch core 60a and the 1st branch core 40a are rolled up and arrange | positioned in the tray 12 of an auxiliary connection part (refer FIG. 6F).

At this time, in the branch connection portion and the auxiliary connection portion, as shown in Fig. 6G, by connecting the branch cable 20 and the branch cable 40 to the respective junction boxes 13 and 14, without further securing the connection length. Intermediate branch connection can be easily performed.

In addition, as shown in FIG. 6H, when branching by the optical fiber core unit, there is no branching core between the branching units 20a between the outer shell cutting points, and thus branching without protecting the branching cores by the unit spiral 80 is performed. By temporarily connecting the first branch cores 60a and the first branch cores 40a cut at the connecting portion to form a temporary connecting portion, the first connecting cores 60a are pulled by the auxiliary connecting side, The first branch cores 40a of the branch connection portion may be drawn out to the auxiliary connection portion through the branching unit 20a. In the trays 11 and 12 of the branch connection portion and the auxiliary connection portion in the optical fiber core unit unit branch as described above, as shown in FIG. 6I, the first and second branch cores 60a and 60b and the first and second branch cores 40a and 40b are arranged.

After performing the intermediate branch in the above-described manner, the intermediate branch connection point is installed in the artificial or pole, which is shown in FIG. 7, in which the unit 20a of the branch cable 20 is connected between the branch connection part and the auxiliary connection part. As a result of performing the intermediate branch connection by using the branch core connection method utilized, the intermediate branch junction box 13 and the auxiliary junction box 14 are in line with the branch cable 20, and the branch cable 40 is It is housed in the intermediate branch junction box (13).

On the other hand, in the second embodiment of the present invention, when it is difficult to send the branch core wire to the auxiliary connection part by utilizing the branching unit in the branch connection part, as shown in FIGS. 8A to 8G, the branch connection part is separated by using a separate tube cable. By connecting the auxiliary connection part, the branch core wire can be easily installed in the auxiliary connection part.

In this embodiment, first, as shown in FIG. 8A, the outer shell corresponding to the length of each junction box is removed from the branch connection portion e and the auxiliary connection portion f, and the branching unit 20a of the branch connection portion e is removed. The predetermined portion is cut from Here, the cut portion is the branch core 60, the remaining portion is not the branch core 70. The core line 60 is divided into a first branch line 60a on the side of the auxiliary connection part f and a second branch line 60b on the side of the branch connection part e.

Then, after drawing out the branch core wires consisting of the first and second branch cores 40a and 40b from the branch cable 40 located on one side of the branch connection portion e, the branch connection portion e and the auxiliary connection portion f ), A tube cable 15 of a predetermined length is provided (see Fig. 8B).

Subsequently, the operator pulls the first asymmetric core 60a toward the auxiliary connecting part f side as shown in FIG. 8C so that the first asymmetric core 60a is located on the auxiliary connecting part f side. The first branch core 40a of the branch cable 40 is protected by the unit spiral 80 and introduced into the tube cable 15 so that the end thereof is positioned at the auxiliary connection side. In addition, the differentiation core line in the branching unit 20a is covered and protected by the unit spiral 80, and a predetermined portion of the second branching line 40b is wrapped and protected by the protection tube 10.

Then, the trays 11 and 12 are attached to the branch connection part and the auxiliary connection part, respectively, and the second branch core 60b and the second branch core 40b are rolled up in the tray 11 of the branch connection part. In the tray 12 of the auxiliary connecting portion, the first branch core 60a and the first branch core 40a drawn from the tube cable 15 are wound and arranged (see Fig. 8D). Accordingly, by connecting the branch cable 20, the branch cable 40, and the tube cable 15 by using the junction boxes 13 and 14 at the branch connection part and the auxiliary connection part, Intermediate branch connection can be easily carried out without additional connection margin (see Fig. 8E).

Furthermore, in the present embodiment, when branching by the optical fiber core unit, since the branch cores do not remain between the branching units 20a between the outer skin stripping points, as shown in FIG. 8F, the protective work of the differential cores by the unit spiral is performed. Pull out the entirety of the first branch core wire 60a and pull it out to the auxiliary connection side, and in the branch cable 40 on the branch connection side, the entire tube of the first branch core 40a is wrapped with the unit spiral 9 to protect the tube. It enters into the cable 15 and is sent to the auxiliary connection side. At this time, the first and second branch cores 60a and 60b and the branch cores 40a and 40b are arranged in the trays 11 and 12 of the branch connection part and the auxiliary connection part in the optical fiber core unit unit branch as shown in FIG. 8G. do.

When the intermediate branch connection is performed by the branch core connection method using the tube cable between the branch connection part and the auxiliary connection part as described above, the intermediate branch connection box 13 and the auxiliary connection box 14 as shown in FIG. It is in line with the feeder cable 20, the branch cable 40 is accommodated in the intermediate branch junction box (13), and the branch cable between the intermediate branch junction box (13) and the auxiliary junction box (14) 20 and tube cable 15 is connected.

When the intermediate branch connection method of the present invention as described above is used for branch connection of an optical cable in a loop wiring or a star wiring of an optical fiber network, the optical fiber core wire of the branch cable is secured without securing the connection length of the branch cable as in the conventional method. Can be easily connected in the form of loop wiring, and the arrangement status of the intermediate branch connection point, the branch and the branch cable in the artificial after the connection is simplified. In the future, even if additional branching occurs at the intermediate branch connection point of the present invention, branching operations can be efficiently performed by opening the junction box cover provided at the branch connection part and the auxiliary connection part, drawing only the branch core and connecting it with the branch core of the branch cable. Can be.

The present invention described above is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those who have

As described above, the present invention can easily plan the cable wiring, save the cable expansion equipment according to securing the length, because it does not consider the branch anticipated point in the construction or operation of the optical cable, and maintains more than the allowable curvature radius There is an effect that can increase the reliability of the cable according to the cable arrangement.

In addition, the present invention is not only easy cable management, but also can be installed in the cable pole without damaging the aesthetics because the branched cable installed on the artificial or pole is arranged in a straight line with the cable advance direction has another effect.

In addition, in the construction of the optical fiber network, it is possible to lower the cost of the optical cable facility, easily absorb the occurrence of branching, and increase the workability in terms of facility management.

Claims (7)

A first step of removing the cable sheaths of the two portions by a predetermined length by setting an auxiliary connection portion at a position spaced apart from the branch connection portion by a predetermined distance in a straight line optical fiber cable; A second step of forming the first and second branch fiber cores by drawing and cutting a predetermined amount of the branch fiber cores from the branch connection part; A third step of connecting the cut first optical fiber core wire to the first branch optical fiber core of a branch cable, and connecting the second branch optical fiber core to a second branch optical fiber core of a branch cable at the branch connection part; A fourth step of connecting the first branch fiber core and the first branch fiber core at the branch connection part; And A fifth step of drawing out a connection portion between the first branch fiber core and the first branch fiber core Intermediate branch connection method of the optical fiber cable comprising a. The method of claim 1, The intermediate branch connection method of the optical fiber cable further comprising a sixth step of wrapping and protecting the remaining different branch core wires in the branch connection portion and the auxiliary connection portion in a unit spiral. The method according to claim 1 or 2, And a seventh step of attaching a tray to the branch connection part and the auxiliary connection part, respectively, and winding and storing the branched optical fiber core wire and the branch optical fiber core wire in the respective trays. A first step of removing the cable sheaths of the two portions by a predetermined length by setting an auxiliary connection portion at a position spaced apart from the branch connection portion by a predetermined distance in a straight line optical fiber cable; A second step of forming the first and second branch fiber cores by drawing and cutting a predetermined amount of the branch fiber cores from the branch connection part; A third step of installing a hollow body having a predetermined length on the auxiliary connection side; A fourth step of pulling the first branch optical fiber core wire and placing it on the auxiliary connection part side, and passing the first branch optical fiber core wire of the branch cable through the hollow body and placing it on the auxiliary connection part side; And A fifth step of connecting one end of the first branch optical fiber core line and the first branch optical fiber core line passing through the hollow body Intermediate branch connection method of the optical fiber cable comprising a. The method of claim 4, wherein The fourth step, The intermediate branch connection method of the optical fiber cable comprising the step of wrapping and protecting the remaining branched core wire and the first branch optical fiber core penetrating the hollow body with a unit spiral. The method according to claim 4 or 5, Intermediate branch connection method of the optical fiber cable wherein the hollow body is a tube cable or a pipe. The method of claim 6, And a seventh step of attaching a tray to the branch connection part and the auxiliary connection part, respectively, and winding and storing the branched optical fiber core wire and the branch optical fiber core wire in the respective trays.