JPH09113735A - Bobbin winding structure of optical fiber - Google Patents

Abstract

(57) An object of the present invention is to provide a bobbin winding structure for an optical fiber which does not cause slack when the optical fiber wound around a bobbin is unwound. SOLUTION: An optical fiber wound around an optical fiber winding bobbin and a bobbin, and between optical fibers,
The optical fiber is wound around a bobbin with an optical fiber holding material having adhesiveness and peelability interposed. As the holding material, foamed polyethylene resin or ultraviolet curable resin may be used. Cover the surface of the optical fiber with a plastic material and either wind the optical fiber around a bobbin before it is completely cured, or wind the optical fiber around the bobbin and then impregnate it with a liquid holding material to solidify it. If so, this structure can be easily obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber element wire, an optical fiber core wire, or a tape type optical fiber core wire (herein collectively referred to as "optical fiber") used for optical fiber communication and the like. When using a relatively short length of several tens of meters or less, the optical fiber can be taken out from the take-up bobbin by the required length, and the bobbin take-up of the optical fiber does not require a special optical fiber cutting end treatment. Regarding the structure.

[0002] An optical fiber or an optical fiber is generally colored by adding a color batch, processed into a tape if necessary, wound on a bobbin or bundled depending on the application, or It is processed into various optical fiber cables.

[0003]

Conventionally, when using an optical fiber, the optical fiber wound around a bobbin or a bundled optical fiber is unwound and cut by a required length. In the case of an optical fiber wound on a bobbin,
The elastic force of the optical fiber may cause loosening from the bobbin to cause loosening or entanglement, which makes it difficult to handle. Therefore, it is necessary to fix the cut end of the optical fiber to the bobbin frame with an adhesive tape, which causes a problem that work efficiency is reduced. Further, in the case of the bundled optical fibers, the operator must pay special attention so that the entanglement does not occur, and there is a problem that the work efficiency is reduced.

Furthermore, when an optical fiber is used, the elastic force of the optical fiber causes slack as described above, which causes a tendency to cut out longer than the length actually required, which lowers economic efficiency. However, there is a problem in that the safety cannot be ensured because the dust of the optical fiber remains.

The present invention has been made in view of these problems, and an object thereof is to provide a bobbin winding structure for an optical fiber which does not cause slack when the optical fiber wound on the bobbin is rewound. And

[0006]

In order to solve the above problems, the bobbin winding structure for an optical fiber according to the present invention is provided between an optical fiber and a bobbin which are multiply wound on an optical fiber winding bobbin. It is characterized in that an optical fiber holding material having adhesiveness and peeling property is interposed between the optical fibers and the optical fiber is wound around a winding bobbin.

According to the present invention as described above, the adhesion prevents the slack from occurring in the natural state, and the peeling property allows the operator to easily take out the optical fiber of the required length as required. Like At that time, the intervening substance may adhere to the taken-out optical fiber, but since it has a peeling property from the optical fiber, it can be easily peeled off. After cutting the optical fiber of the required length, the optical fiber will not be loosened due to the adhesiveness of the intervening substance without any treatment of the cut end.

In order to provide the contradictory characteristics of the adhesiveness and the peeling property as described above, in the preferred embodiment of the present invention, the optical fiber holding material is interposed so that the surface of the optical fiber is covered with a plastic material. It has a structure in which an optical fiber is wound on a bobbin before the plastic material is completely cured. Furthermore, in another preferred embodiment of the present invention, as a structure for interposing an optical fiber holding material, after winding the optical fiber on the bobbin,
It has a structure in which a liquid holding material is impregnated and solidified.

The intervening substances in these cases are Young's modulus 50 to 1 of the material used as the coating material in the optical fiber.
A material having a Young's modulus smaller than 00 kgf / mm ² by one digit to two digits is formed to a thickness of about 100 μm or less. Depending on the type of intervening substance, it is also effective to use a release agent such as lecithin, petrolatum or silicone grease in combination.

As a material of the bobbin for winding the optical fiber, it is possible to use a stack of thick paper, wood, styrofoam, high density polyethylene resin, acrylic resin and the like. In particular, it is convenient to use a transparent material for the collar portion because the remaining amount of the optical fiber can be visually recognized.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a bobbin winding structure of an optical fiber in which an optical fiber 1 is multiply wound on a bobbin 3 having a diameter L1 and a collar having a thickness d, an outer diameter L2, and a length L3. . In the figure, 2 is an intervening substance. In this example, L1 = 100 mm, L2 = 60 mm, L3 = 50 mm, d
A 1500 to 2000 m optical fiber core is wound on a bobbin of 2 mm.

Foamed polyethylene resin or ultraviolet curable resin was used as the intervening substance. The Young's modulus of the foamed polyethylene resin is about 5 kgf / mm ² , and the Young's modulus of the ultraviolet curable resin is about 10 kgf / mm ² . The surface of the optical fiber core was covered with these resins, and the optical fiber core was wound on a winding bobbin before the resin was completely cured. In this case, the same applies when the optical fiber core wire is wound around a bobbin, impregnated with a liquid resin, and then solidified.

The cross section of the optical fiber portion of the bobbin winding structure for an optical fiber according to the present invention thus formed has a structure as shown in FIG. The space between the optical fiber core wires is filled with resin, and when the optical fiber core wire 1 is taken out, this resin may be taken out together as shown in the figure. As shown in the figure, the optical fiber core wire 1 and the resin 2'are easily separated without affecting other portions of the wire.

Although the optical fiber core wire has been described in the above example, the optical fiber element wire or the tape type optical fiber can be treated similarly. Further, the term “bobbin” used above is interpreted to include all those having a function of winding a linear body with or without a collar and whether or not the core has a cylindrical shape. It should be.

[0015]

As described above, according to the present invention,
It is possible to obtain a bobbin winding structure of an optical fiber that does not cause slack when the optical fiber wound on the bobbin is rewound.

[Brief description of the drawings]

FIG. 1 is a diagram showing a bobbin winding structure of an optical fiber.

FIG. 2 is a view showing a cross section of an optical fiber portion of an optical fiber bobbin winding structure according to the present invention.

[Explanation of symbols]

 1 optical fiber 2 inclusions 3 bobbin L1 bobbin collar diameter d bobbin collar thickness L2 bobbin outer diameter L3 bobbin length

Claims (5)

[Claims] 1. A bobbin winding structure of an optical fiber in which an optical fiber is wound around an optical fiber winding bobbin, and the optical fiber winding bobbin is closely attached between the optical fiber wound around the bobbin and between the optical fibers. A bobbin winding structure for an optical fiber, wherein the optical fiber is wound around a winding bobbin with an optical fiber holding material having a releasing property and a peeling property interposed therebetween. 2. The bobbin winding structure for an optical fiber according to claim 1, wherein the optical fiber holding material is a plastic material. 3. The bobbin winding structure for an optical fiber according to claim 2, wherein the plastic material is a foamed polyethylene resin or an ultraviolet curable resin. 4. The structure for interposing the optical fiber holding material is formed by coating the surface of the optical fiber with a plastic material and winding the optical fiber around a winding bobbin before the plastic material is completely cured. The bobbin winding structure for an optical fiber according to claim 2 or 3. 5. The structure in which the optical fiber holding material is interposed is formed by winding the optical fiber around a bobbin, impregnating the liquid holding material, and solidifying the liquid holding material. Alternatively, the bobbin winding structure of the optical fiber according to the above item 3.