JP2768819B2 - Drum for winding optical fiber dummy - Google Patents

Description

The present invention relates to an improvement in an optical fiber dummy winding drum. In particular, the present invention relates to an improvement capable of improving workability in a step of removing an optical fiber wound on an optical fiber dummy winding drum after the winding is completed.

[Conventional technology]

The optical fiber refers to an optical transmission line in which a core wire composed of a double cylinder of quartz having an outer diameter of 125 μm is coated with a plastic coat having a thickness of about 60 μm.

 Optical fibers have the following unique properties.

I. Because it is very thin, it is extremely lightweight and breaks easily.

B. Bending with a small radius of curvature (called micro-bending) causes radiation loss of light and reduces the transmission efficiency of the optical fiber.

C. In the case of a metal wire, the transmission loss of the optical fiber increases and the transmission efficiency of the optical fiber decreases only by applying a tension that is considered normal.

By the way, immediately after being manufactured, the optical fiber is wound on a winding bobbin by a winding machine directly connected to the manufacturing apparatus. When the winding on the winding bobbin is completed, the optical fiber is transferred to a dummy winding drum provided adjacently and coaxially with the winding bobbin, and is wound several turns. It is cut and the winding step of the winding bobbin is completed.

The purpose of the dummy winding drum is to cut the end of the wound optical fiber immediately after the winding on the winding bobbin is completed, and the optical fiber that has been pulled for cutting and is under a slightly high tension, A bobbin for winding a few turns from the terminal to be cut because it sinks into the stack of optical fibers already wound on the bobbin and damages the outer surface of the optical fiber or degrades the transmission characteristics of the optical fiber. Separately, the free end of the cut optical fiber is swung by the centrifugal force, hitting the optical fiber already wound on the winding bobbin, causing damage to a considerable length This is to prevent that.

The conventional optical fiber dummy winding drum is 4a
It is shown in Fig. 4b.

4a and 4b. FIG. 4a is a side view, and FIG. 4b is a sectional view taken along line BB of FIG. 4a.

In the figure, 10 is an optical fiber dummy winding drum, and 11 is an optical fiber winding bobbin. The dummy winding drum 10 and the winding bobbin 11 are disposed on the same shaft 13 adjacent to each other and rotate integrally. 12
Is an optical fiber wound around the dummy winding drum 10 and the winding bobbin 11.

The optical fiber 12 is wound around the dummy winding drum 10 for several turns, the end thereof is cut, and after the winding process is completed, the optical fiber wound on the dummy winding drum 10 is wound.
While scraping off the drum 12 from the drum 10, the bobbin 11 already wound up is removed from the shaft 13. The optical fiber 12 of several turns wound around the drum 10 for drum winding is cut off from the bobbin 11 for winding and discarded.

[Problems to be solved by the invention]

As described above, in the optical fiber dummy winding drum according to the related art, as a step after the winding step is completed, a step of scraping the optical fiber from the dummy winding drum, and removing the optical fiber from the winding bobbin. There is a drawback that two steps including a separating step are required, and as a result, workability is remarkably reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks, and to eliminate the optical fiber wound around the dummy winding drum in a very simple manner in one step after winding is completed, thereby improving workability. An object of the present invention is to provide a winding drum.

[Means for solving the problem]

The above object is achieved by an optical fiber dummy winding drum in which an optical fiber breakage concave portion 4 is formed on a peripheral surface of an optical fiber winding surface in a direction excluding a direction perpendicular to the axis and breaks the optical fiber by pressing. Is done.

In the above configuration, the edge (5) of the recess (4) is provided.
Is less than about 90 °, the edge (5) of the recess (4) projects in an eaves-like shape toward the inside of the recess (4), or the periphery of the drum (4) A hard plate (6) is adhered to the surface except for a region corresponding to the recess (4), and the hard plate (6) is attached to the recess (4).
The effect is particularly remarkable if it projects in the shape of an eave inward.

[Action]

The optical fiber dummy winding drum according to the present invention has an optical fiber winding concave portion formed on the winding surface of the optical fiber winding surface in a direction excluding a direction perpendicular to the axis and for breaking the optical fiber by pressing. On the other hand, the optical fiber wound around this drum has an outer diameter of 125 μm as described above.
Since the core wire composed of a double cylinder of quartz having a thickness of m is coated with a plastic coat having a thickness of about 60 μm, it is very thin and easily broken. Therefore, when the optical fiber breakage concave portion formed on the optical fiber dummy winding drum according to the present invention is pressed with a finger or a simple jig from above the optical fiber, the entire number of turns of the optical fiber wound on the drum is extremely reduced. The optical fiber can be easily folded, and the optical fiber is divided into a plurality of pieces by the folding, so that the optical fiber easily falls off the dummy winding drum.

Therefore, the two steps of the step of removing the optical fiber from the dummy winding drum and the step of separating the excess optical fiber from the winding bobbin are referred to as pressing the optical fiber above the recess with a finger or a simple jig. It can be changed in one step, and workability can be significantly improved.

Note that the angle of the edge of the concave portion is 90 ° or less, the edge of the concave portion protrudes like an eave, or a hard plate material is stuck except for a region corresponding to the concave portion. When the hard plate material protrudes in the shape of an eave inside the concave portion,
Since the stress concentration of the optical fiber when pressing with a finger or a jig is remarkable, the optical fiber can be more easily folded, so that the workability is further improved.

〔Example〕

Hereinafter, drums for winding an optical fiber dummy according to three embodiments of the present invention will be described with reference to the drawings.

1st Embodiment (corresponding to claim [1] See FIGS. 1a and 1b. FIG. 1a is a side view of an optical fiber dummy winding drum according to the present embodiment, and FIG. 1b is A in FIG. 1a. It is -A sectional drawing.

In the drawing, reference numeral 1 denotes an optical fiber dummy winding drum, which is disposed coaxially adjacent to a winding bobbin and rotates integrally. The diameter of the dummy winding drum 1 is selected to be substantially the same as the flange diameter of the winding bobbin. Numeral 4 extends in a direction (for example, a direction parallel to the axis as shown in the drawing) other than a direction perpendicular to the axis on the winding surface of the optical fiber of the dummy winding drum 1 and breaks the optical fiber by pressing. This is an optical fiber breakage recess. Reference numeral 5 denotes an edge of the concave portion 4. When the angle of the edge 5 is 90 ° or less, the effect of breaking and dispersing the optical fiber is particularly high. Reference numeral 7 denotes a flange of the dummy winding drum 1 for preventing the optical fiber from coming off the drum 1.

If the portion corresponding to the concave portion 4 of the optical fiber of several turns wound on the dummy winding drum 1 is pressed from above with a finger or a simple jig (for example, a plate bar or a driver that is close to the user), Since the optical fiber is easily broken and divided into a plurality of pieces, the optical fiber is easily separated and dropped from the dummy winding drum 1. Accordingly, the two steps of the step of removing the optical fiber from the dummy winding drum 1 and the step of separating the excess optical fiber from the winding bobbin are performed by only one pressing operation.
It can be changed by the process.

Note that the present invention does not limit the number of the concave portions 4 described above.

Second Embodiment (corresponding to claim [3]) See FIG. 2 The figure shows an optical fiber dummy winding drum 2 according to this embodiment.
FIG.

This embodiment is different from the first embodiment only in that in the present embodiment, the edge 5 of the recess 4 protrudes like an eave toward the inside of the recess 4. Other configurations are the same as those of the first embodiment.

In the case of the optical fiber dummy winding drum according to the present embodiment, since the stress concentration at the edge 5 due to pressing is large, the optical fiber can be more easily broken than in the case of the first embodiment, and the workability is further improved. Can be improved.

Third Embodiment (corresponding to claim [4]) See FIG. 3. The figure shows a drum 3 for winding an optical fiber dummy according to this embodiment.
FIG.

This embodiment is different from the first embodiment in that, in this embodiment, the peripheral surface of the dummy winding drum 1 of the first embodiment is
A hard plate material (for example, a stainless steel plate) 6 is stuck except for a region corresponding to the concave portion 4, and the hard plate material 6 only protrudes in an eave shape toward the inside of the concave portion 4. is there. Other configurations are the same as those of the first embodiment.

In the case of the optical fiber dummy winding drum according to the present embodiment, since the stress concentration at the end of the hard plate material due to pressing is large, the optical fiber can be more easily broken than in the case of the first embodiment, and the workability is further improved. Can be improved.

〔The invention's effect〕

As described above, the optical fiber dummy winding drum according to the present invention has an optical fiber breakage concave portion that extends in a direction other than the direction perpendicular to the axis and breaks the optical fiber by pressing on the optical fiber winding surface. Because it is formed,
By pressing the optical fiber wound around the dummy winding drum with a finger or a simple jig from above onto the portion corresponding to the concave portion, it is possible to fold the optical fiber extremely easily, and Since the optical fiber is divided into a plurality of pieces, it is possible to easily discretely drop the optical fiber from the dummy winding drum, and therefore, the step of removing the optical fiber from the dummy winding drum and the excess from the winding bobbin. The two steps of separating the optical fiber can be changed to one step of pressing the optical fiber above the concave portion with a finger or a simple jig, and the light wound on the optical fiber dummy winding drum can be changed. The workability in the step of removing the fiber after the winding is completed can be significantly improved.

Also, the angle of the edge of the recess is 90 ° or less, or the edge of the recess protrudes like an eave, or a hard plate material is stuck except for a region corresponding to the recess, When the hard plate material protrudes in the shape of an eave inside the concave portion,
Since stress concentration of the optical fiber when pressing with a finger or a simple jig is remarkable, the optical fiber can be more easily broken, and the workability can be further improved.

[Brief description of the drawings]

FIG. 1a shows a first embodiment of the present invention (corresponding to claim [1]).
FIG. 2 is a side view of the optical fiber dummy winding drum according to the first embodiment. FIG. 1b is a sectional view taken along the line AA of FIG. 1a. FIG. 2 shows a second embodiment of the present invention (corresponding to claim [3]).
1 is a cross-sectional view of an optical fiber dummy winding drum according to the first embodiment. FIG. 3 shows a third embodiment of the present invention (corresponding to claim [4]).
1 is a cross-sectional view of an optical fiber dummy winding drum according to the first embodiment. FIG. 4a is a side view of an optical fiber dummy winding drum and an optical fiber winding bobbin according to the prior art. FIG. 4b is a sectional view taken along line BB of FIG. 4a. 1 · 2 · 3 ··· Optical fiber dummy winding drum 4 ··· Optical fiber breakage concave portion 5 ···· Edge of the optical fiber breakage concave portion 6 ··· Hard plate material 7 ··· Dummy of dummy winding drum 10: Drum for winding optical fiber dummy (prior art), 11: Bobbin for winding optical fiber, 12: Optical fiber, 13: Shaft.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Seiichi Nishiyama 3752 Kawaguchicho, Hachioji-shi, Tokyo Inside the Seisakusho Co., Ltd. (56) References JP-A-60-15366 (JP, A) JP-A-64- 38379 (JP, A) Fully open 60-609582 (JP, U) Fully open 52-84840 (JP, U) Fully open 2-4867 (JP, U) Fully open 56-158459 (JP, U) 57-28849 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65H 65/00 B65H 75/00-75/32 B65H 54/34

Claims (4)

(57) [Claims] 1. An optical fiber breakage recess (4) formed on a winding surface of an optical fiber and extending in a direction other than a direction perpendicular to the axis to break the optical fiber by pressing. Drum for winding fiber dummy. 2. The angle of the edge (5) of said recess (4) is about 90.
ド ラ ム The optical fiber dummy winding drum according to claim 1, wherein: 3. The optical fiber dummy winding according to claim 1, wherein an edge (5) of the recess (4) projects in an eaves shape toward the inside of the recess (4). For drums. 4. A hard plate material (6) is adhered to a peripheral surface of the drum except for a region corresponding to the concave portion (4), and the hard plate material (6) is attached to the concave portion (4). The drum for winding an optical fiber dummy according to claim 1, wherein the drum protrudes in an eave-like shape inward.