JP2526833Y2 - Multi-core to single-core conversion device - Google Patents

Description

[Detailed description of the invention] [Industrial application field] In an optical cable in which a multi-core tape core unit or the like is assembled, when one optical core unit in a cable is branched into several optical fiber cores, A multicore-to-single-core conversion device of a cord type may be used.

The present invention relates to a multicore-single-core conversion device of a cord type.

[Prior Art] FIG. 3 shows a multicore-single-core conversion device 10 of a cord type.
An example is shown below.

This is a structure in which a tape covering material of a predetermined length, for example, a central portion of a tape type multi-core optical fiber unit is removed.

In other words, both ends are a core integrated portion 12 which remains as a multi-core tape-shaped core unit, and a central portion is a core separated portion 14 which is formed of a separated and interdigital core 16.

-Usage (Fig. 4): This is an example in which one optical fiber cable 18 is used to branch one optical fiber 16 from one optical fiber unit 20.

The core unit 20 is cut off, and the multi-core to single-core conversion device 10 is connected 22 between them.

Then, the core to be branched of the core separation part 14
Cut 16 and connect branch cable end core 24 to it 26
I do.

The core unit 28 that does not need to be branched remains as it is. However, the device 10 may be connected in consideration of branching in the future.

 30 indicates an outer box.

[Problems to be Solved by the Invention] (1) Although the multi-core / single-core conversion device is used as described above, since the core separation portion 14 has a small-diameter core structure, an impact from the outside may occur. In addition, there is a risk that the surface of the core wire 16 may be scratched.

(2) Before use for branching, etc.,
When the wire itself is stored in the connection portion in a rounded state, the wires 16 are apt to be entangled with each other because the wires 16 of the wire core are interdigitated in the wire separation portion 14.

[Means for Solving the Problems] As shown in FIGS. 1a to 1c, the present invention relates to a protective cover 32 having a longitudinal slit 36 at one end.
Over the core separation part 14 of the multi-core / single-core conversion device 10 to solve the above problem.

[Description] FIGS. 1b and 1c show examples of the protective cover 32. FIG.

The length of the main body 34 is longer than the core separation portion 14 of the multi-core to single-core conversion device 10.

Further, the cross-sectional shape is circular or polygonal, and the inner diameter is thicker than the core wire integrated portion 12.

 The material is an organic polymer material, metal or the like.

At one end, a longitudinal slit 36 is provided. The size varies depending on the number of cords 16 to be taken out therethrough, but the length is about 1 to 30 cm and the width is about 0.2 mm to 1 cm.

This protective cover 32 is usually fed from the end of the multi-fiber to single-fiber conversion device 10 as shown in FIG.

By doing so, there is no fear of damaging the core wire 16. In addition, even if the multi-core to single-core conversion device 10 is
The trouble of entanglement does not occur.

-Procedure for its use: As described above, a case where the optical fiber is used for branching an optical fiber core will be described.

(1) As shown in FIG. 2a, a multi-core to single-core conversion device 10 (covered with a protective cover 32) is connected between terminals of the cable core unit 20.

At this time, the slit 36 is set on the transmission side. In this case, the left side is the transmitting side.

(2) The protective cover 32 is shifted in the direction opposite to the portion provided with the slit 36 (FIG. 2b).

(3) Cut the core 16 to be branched and connect 26 to the core 24 of the branch cable terminal (FIG. 2c).

(4) Return the protective cover 32 until the deepest part 38 of the slit 36 comes close to the boundary between the core wire integral part 12 and the core wire separation part 14,
A window 39 having a length of about 0.2 mm to 2 cm for forming the cord 16 is formed.

Then, the portions 40 and 42 at both ends of the protective cover 32 are fixed to the core integrated portion 12 with an adhesive tape (not shown) or the like so that the protective cover 32 does not move (FIG. 2d). However,
If the fiber is branched again later, it is assumed that the cover will be moved, and the adhesive tape should be easily removable.

(5) As in the case of FIG. 4 described above, the finished state when the core unit 28 that does not branch is included is as shown in FIG. 2e.

[Effects of the Invention] Protective cover 32 provided with longitudinal slit 36 at one end
To cover the core separation part 14 of the multi-core / single-core conversion device 10.
A window 39 can be formed between the deepest portion 38 of the 36 and the core-integrated portion 12, from which the core 16 can be drawn.

Therefore, even if an impact is applied from the outside, there is no possibility that the core wire of the core wire separation portion 14 will be damaged.

(2) Even if the device 10 of the present invention is connected in a cable assuming that it will be branched in the future, and the device 10 is stored in the connection portion in a rounded state, the core separation portion 14 may be used. Is prevented from becoming entangled with each other.

[Brief description of the drawings]

Fig. 1a is an explanatory view of an embodiment of the present invention, Figs. 1b and 1c are explanatory views of different examples of the protective cover 32, Figs. 2a, 2b, 2c, 2d, and 2e. FIG. 3 is an explanatory diagram showing the usage status according to the procedure, FIG. 3 is an explanatory diagram of a conventional multi-core / single-core conversion device, and FIG. 4 is an explanatory diagram of the usage status. 10: Multi-core to single-core conversion device 12: Integral core, 14: Separate core 16: Core, 18: Optical cable 20: Core unit, 22: Connection unit 24: Core, 28: Core unit 30: outer box, 32: protective cover 34: body, 36: slit

Claims (1)

(57) [Scope of request for utility model registration] 1. A core integrated part 12 having a plurality of cores in a unit shape is provided on both sides, and separated between them.
In the multi-core / single-core conversion device, which is a core separation portion 14 composed of interdigital cores 16, a protective cover 32 provided with a longitudinal slit 36 at one end is provided.
A multi-fiber to single-fiber conversion device, wherein the multi-fiber to single-fiber conversion device is placed on the core separation part 14.