JPS6315205A - Multipoint connecting method for tape core wire - Google Patents

Abstract

PURPOSE:To easily connect a branch line to an arbitrary optical fiber core wire, in an arbitrary part of a tape core wire, by welding and connecting in a lump both ends of a connecting unit to a cutting end of the tape core wire, and also, fusing and connecting the branch line to a cutting end of a single core wire, and removing an alignment clamp. CONSTITUTION:A tape core wire 3 is cut at a branching part, and thereafter, an optical fiber core wire 1 is exposed by peeling the covering, and a connecting unit 4 is interposed and inserted between the cutting ends. Subsequently, a single core wire 5 is held and aligned by an alignment clamp 6, and thereafter, an optical fiber 11 is exposed by peeling off the covering, its tip is cut uniformly, and to the cutting end of the tape core wire 3, both ends of the connecting unit 4 are fused and connected in a lump. Thereafter, the single core wire 5 of the rear end side of the alignment clamp 6 is held by a temporary locking clamp 12, the alignment clamp 6 is removed, a reinforcer 13 is attached to a connecting part of the tape core wire 3 and the single core wire 5, and thereafter, the temporary locking clamp 12 is removed. Next, single core wires 5a, 5b are cut in the middle, a branch line 14 to a subscriber is fused and connected to its cutting end, and to its connecting part, a reinforcer 15 is attached.

Description

[Detailed Description of the Invention] Technical Field C] The present invention relates to a tape-shaped fiber (tape-shaped multi-core optical fiber).
The present invention relates to a method for connecting a branch line (branched optical fiber coated line) to a desired coated optical fiber line within a branched optical fiber line.

[Prior art and its problems]

What about tape core wire? 3 [Several optical fibers are arranged in a plane and coated all at once to form a tape shape. When an optical cable is constructed using such tape core wires,
Tape-fiber optical cables are used for chain-wire cables with a large number of fibers because they enable high-density optical fibers, are inexpensive per fiber, and can connect multiple fibers at once. has been done.

As mentioned above, tape fiber optic cables have various advantages, but they are not used for subscriber distribution cables.The reason is that tape fibers are coated all at once, so individual This is because it is difficult to separate optical fibers into optical fibers, and it is not possible to branch from any optical fiber within the tape to the subscriber.

c. Means for solving the problem and its operation] The present invention overcomes the problems of the prior art as described above and provides a method for connecting a branch line to an arbitrary optical fiber core in a ribbon core. In this method, both ends of a single fiber core (single optical fiber core yA) having the same number of cores as the tape core wire,
Prepare the connection unit / ) that is held together with an alignment clamp in a flat state, cut the tape core wire at the branch connection point, and connect both ends of the above connection unit to the cut end, respectively. At the same time, among the single-fiber wires of the above-mentioned concatenation unit, the single-fiber wire to which the branch wire should be connected is cut in the middle, and the branch wire is fusion-spliced to the cut end. The present invention is characterized in that the alignment clamp is removed after the fusion splicing of the connection units.

If the tape core wires are once cut in this manner and then reconnected via the connection unit having the above configuration, the individual core wires can be separated and branch connections can be made.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, as shown in FIGS. 1(a) and 1(b), a tape core 3 made by applying v; As shown in FIG. 2, the optical fiber core 1 is exposed by cutting and coating the ends. If the branch connection point is determined in advance, as shown in Figure 1 (c), if the tape core wires 3.3 are connected in a straight line at that point and left uncoated, it will not be possible to easily The state shown in Figure 2 can be achieved.

Next, as shown in FIG. 3, the connection unit 4 is inserted between the cut ends of the tape core wire 3. This connection unit 4 holds both ends of the same number of single fibers 5 as the number of fibers of the tape fiber 3 (5 fibers in the illustrated example) with an alignment clamp 6 while aligning them in a plane. It is in the same condition as before. Single core wire 5
Since it can be taken out as it is, a harder resin is used for coating the single fiber 5 than that for the coating of the optical fiber core 1 in the tape core wire 3.

The alignment clamp 6 is, for example, as shown in FIG.
and the upper cover 9 are hinged on one side, and the other side is connected with the screw 1.
By tightening to 0, the five single-core wires 5 can be held together. The wave is made so that the line 5 does not move. After gripping and aligning the five single-fiber wires 5 with such an alignment clamp 6 as shown in FIG. 4, the end coating is removed to expose the optical fiber 11 as shown in FIG. Then trim the ends evenly.

Next, as shown in FIG. 6, both ends of the connection unit 4 are fused and spliced to the cut and twisted tape core wire 3, respectively.

This connection method is the same as the conventional connection method between tape cores. After fusion splicing (or the front is possible), the single fiber wire 5 on the rear end side of the alignment clamp 6 is held by the temporary clamp 12. The alignment clamp 6 is removed after the temporary clamp 12 is attached.

Then, the state as shown in Fig. 7 will be created, so apply a weak tension between the tape core wire 3 and the temporary clamp 12, and while keeping the space straight, reinforcing the connection between the tape core wire 3 and the single core 915. Attach the container 13. This reinforcing device 7 is the same as that used for reinforcing the conventional tape fiber connection part, and is
There are two types: one in which the connection part is tied with a piece of temporary glass, and another in which a reinforcing plate and real melt tube are built into the heat shrink tube, but either can be used.

After attaching the reinforcing device 13, the temporary clamp 12 is removed and the result is as shown in FIG. The tape core wires 3 cut in the above manner are reconnected via the single core wires 5. Since the connection is made by fusion splicing, the increase in loss is small.

Next, as shown in FIG. 9, among the plurality of single-core wires 5 of the connection unit 4, the single-core wires 5a and 5b (two single-core wires on one side in the illustrated example) to which the branch line is connected are connected. Cut in the middle. After that, as shown in FIG. 10, the single-filament wires 5a and 5b are cut!
Branch lines 14 to each subscriber are fusion-spliced to the IT end. In this case, for example, if the wiring system is such that only one end of the optical cable is connected to the station, it is only necessary to connect the branch line 14 to the cut end of the cut single-core %i5a/5b on the station side, but if both ends of the optical cable are For example, in the case of a loop-shaped wiring system connected to
&ff 14 must be connected.

Finally, as shown in Figure 8, the single fiber wires 5a and 5b and the branch wire 1
If the reinforcing device 15 is attached to the connection part 4, the branch connection is completed. The reinforcing device 15 is for a normal single-core optical fiber.

In the above embodiment, the branch wires are connected after connecting the tape core wire and the connection unit, but it is also possible to connect the tape core wire and the connection unit after connecting the connection unit and the branch wire. good.

〔Effect of the invention〕

As explained above, according to the present invention, a branch line can be extremely easily connected to any optical fiber core at any location on the tape core. Therefore, it becomes possible to use the tape-core optical cable, which has various advantages, as a subscriber system distribution cable, and the effect is extremely large.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are a plan view and a sectional view of the tape core, and FIG. 1(c) is a plan view showing a straight connection part of the tape core;
2, 3, 5 to 11 are plan views showing the method for branching and connecting tape core wires according to an embodiment of the present invention in order of steps, and FIGS. 4(a), (b), and (c). 1A and 1B are a plan view, a longitudinal sectional view, and an end view of an alignment clamp used in the same method. 1 - optical fiber core, 2 - coating, 3 - tape core, 4 -
Connection unit lift, 5~Hayashin wire, 6~alignment clamp, 12~
Temporary clamp, 13~reinforcer, 14~branch line, 15~
Reinforcer.゛(-Engraving of one drawing (no change in content) Figure 1 (A) Part C)
Q\) Figure 2, Figure 5, Figure 6, Figure 7. ]3 1Z
5 Figure 5 Figure 11 Procedure + nT official text (method) % formula % 1. Indication of the case Japanese Patent Application No. 158847/1983 2. Title of the invention Branch connection method for tape core wires 3. Related Patent applicant address: 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Name
(529) Furukawa Electric Co., Ltd. Representative Etsuji Kusakabe 4, Agent (101) Address 7-5 Kanda Matsunaga-cho, Chiyoda-ku, Tokyo Date of amendment order Sent September 30, 1985 6 Increase due to amendment Number of inventions: 07, subject to amendment

Claims (1)

[Claims] Grip both ends of single fiber cores (single core optical fiber cores) with the same number of cores as tape core wires (tape-shaped multi-core optical fiber core wires) with alignment clamps while aligning them flatly. Prepare a connection unit in the state of Cut the single fiber wire to which the wire (branched optical fiber core wire) is to be connected in the middle, fusion splice the branch wire to the cut end, and attach the alignment clamp after fusion splicing the tape core wire and the splicing unit. A method for branching and connecting tape core wires, which is characterized in that they are removed.