JP2846444B2 - Static eliminator for optical fiber - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement in a static electricity removing device for optical fibers. In particular, the present invention relates to an improvement for eliminating static electricity generated in an optical fiber fed overhead without deteriorating the transmission characteristics of the optical fiber and reducing the possibility of deteriorating aesthetic appearance.

[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 microbending) causes radiation loss of light and lowers 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. In this winding machine, a plurality of pulleys are used to guide the optical fiber. These pulleys are generally made of plastic, and the surface of the optical fiber is also coated with a plastic, so that during the winding process of the optical fiber, static electricity is generated due to friction between the optical fiber and the pulley.

The trouble caused by the static electricity occurs at a high speed of the winding speed of the optical fiber of 300 m / min or more. Failures due to static electricity are as follows.

B) The charged optical fiber adsorbs dust, and this dust causes clogging of the dies in the coloring process (the process of coating the surface with the molten colored resin), which is the next process of the winding process, and interrupts the operation. You may not get it.

B. The charged optical fiber gradually climbs along the wall of the groove of the suspended pulley and towards the groove ridge, and in some cases breaks off beyond the groove ridge, resulting in normal winding. Often impossible.

As a static electricity removing device according to the related art, there is an ion spray type static eliminator. This is a device in which a high voltage is applied to a needle electrode to cause a corona discharge, and the ions generated by the corona discharge are blown to a charged body. There is also a static eliminator for bringing a grounded metal into contact with a charged body.

[Problems to be solved by the invention]

However, in the above-described ion spraying type static eliminator, it is extremely difficult to stably wind the optical fiber by swinging the optical fiber due to the wind used when spraying ions. Also, contacting the grounded metal roller with the optical fiber during the winding process creates a scratch on the surface of the optical fiber due to friction between the optical fiber and the metal,
It is not preferable because the transmission characteristics of the optical fiber are degraded by changing the tension of the optical fiber.

Although various methods for removing static electricity generated in optical fibers have been studied in the art, none of them have their advantages and disadvantages, and no satisfactory one has been realized. Therefore, there has been a demand for the development of a sufficiently satisfactory static eliminating apparatus for optical fibers. Was.

SUMMARY OF THE INVENTION An object of the present invention is to meet the above-mentioned demands, and it is possible to remove static electricity from an optical fiber without deteriorating the transmission characteristics of the optical fiber and reducing the possibility of deteriorating the aesthetic appearance. An object of the present invention is to provide a static electricity removing device for an optical fiber that enables operation.

[Means for solving the problem]

The above object is achieved by any of the following means.

The first means is that at least one conductive member (1) having one end (11) being pointed and the other end (12) being grounded is provided.
The tip (11) is a static eliminator for optical fibers disposed near the optical fiber fed overhead.

In the configuration of the first means, when the plurality of tips (11) are plural, and each of the plurality of tips (11) is distributed and arranged in a direction in which the optical fiber is fed,
The effect is particularly remarkable.

Further, in the configuration of the first means, the number of the tips (11) is plural, and each of the plurality of tips (11) is disposed so as to surround the optical fiber. The effect is particularly remarkable when a plurality of items 11) can be divided in the direction along the feeding direction of the optical fiber.

The second means comprises a conductive member (2) having at least one point (21) and one other end (22) to be grounded, wherein the point (21) is provided by an overhead supply. This is an optical fiber static electricity removing device arranged near the optical fiber to be fed.

In the configuration of the second means, the point (21)
The effect is particularly remarkable when each of the plurality of points (21) is distributed in the direction in which the optical fiber is fed.

Further, in the configuration of the second means, the number of the tips (21) is plural, and each of the plurality of tips (21) is distributed around the optical fiber,
The effect is particularly remarkable when a plurality of the pointed ends (21) can be divided in a direction along the feeding direction of the optical fiber.

[Action]

The static electricity removing device for an optical fiber according to the present invention comprises a grounded conductive needle-like body disposed in the vicinity of the optical fiber while keeping the non-contact state. Since the charged optical fiber has a considerably high potential with respect to the ground due to the static electricity, a large potential gradient is formed in the vicinity of the tip of the needle-like body which is opposed to the optical fiber at a close distance. A corona discharge is generated near the tip due to the strong potential gradient, and the corona discharge induces the insulation of the space between the tip and the optical fiber to be broken, thereby causing a discharge and removing static electricity on the optical fiber. Is done.

Since the conductive needle and the optical fiber are not in contact with each other, the transmission characteristics of the optical fiber may be reduced or the optical fiber may not be damaged due to friction between the optical fiber and the tip of the needle. Absent.

〔Example〕

Hereinafter, a static electricity removing device for an optical fiber according to a second embodiment of the present invention will be described with reference to the drawings.

First Embodiment (corresponding to claim [1]) See FIG. 1. The figure shows a case in which, for example, a static electricity removing device is installed between a bobbin for winding an optical fiber and a guide pulley.

In the figure, reference numeral 1 denotes a conductive member, and reference numeral 11 denotes a point of the conductive member 1, which is arranged near the optical fiber 3 fed overhead. Reference numeral 12 denotes the other end of the conductive member 1 which is grounded. Reference numeral 4 denotes a winding bobbin for winding the optical fiber 3, and reference numeral 5 denotes a pulley for guiding the optical fiber 3.

Next, the operation of the static electricity removing device for optical fibers according to the present embodiment will be described.

When the optical fiber 3 charged by friction with the pulley 5 and another pulley (not shown) passes near the point 11, the electric discharge between the point 11 and the optical fiber 3 causes Static electricity is lost.

The single point 11 described above is simpler in construction and therefore less expensive and economical. Note that the optical fiber is liable to vibrate because only a small tension is allowed due to its transmission characteristics. When the optical fiber 3 is vibrated, it is possible to dispose the pointed end opposite to the node, which is 1%.
A single point is sufficient.

When a plurality of the tips 11 are distributed and arranged in the feeding direction of the optical fiber 3 or when the plurality of the tips 11 are plural and each of the plurality of the tips 11 is distributed and arranged so as to surround the optical fiber 3. In this case, even when the optical fiber 3 is vibrated and cannot be identified at a single portion serving as a node, the distance between any one of the plurality of tips and the optical fiber 3 is set to a distance suitable for electric discharge. As a result, the probability of removing static electricity from the optical fiber 3 is improved.

When each of the plurality of tips 11 is distributed around the optical fiber 3, the plurality of tips 11 can be divided in a direction along the feeding direction of the optical fiber 3. In addition, the work of wire-wrapping the optical fiber 3 at the beginning of winding (work of sequentially hanging the optical fiber on the pulley and the bobbin) becomes easy.

It is of course possible to dispose the static electricity removing device for optical fibers according to the present embodiment between the pulleys to remove static electricity from the optical fibers.

Second Embodiment (corresponding to claim [4]) See FIG. 2 This embodiment is different from the first embodiment in that the other end of the conductive member is individually grounded in the first embodiment. On the other hand, in this embodiment, only the other end common to at least one point is grounded.

In the figure, reference numeral 2 denotes a conductive member, and reference numeral 21 denotes at least one pointed end of the conductive member 2, which is disposed near the optical fiber 3 fed overhead. Reference numeral 22 denotes the other end of the conductive member 2 which is grounded. Reference numeral 4 denotes a winding bobbin for winding the optical fiber 3, and reference numeral 5 denotes a pulley for guiding the optical fiber 3.

The operation of the static electricity removing device for optical fibers according to the present embodiment is the same as that of the first embodiment,
Advantages of a single tip 21 and a case where a plurality of tips are distributed and arranged in the feeding direction of the optical fiber 3 or a case where they are distributed and arranged around the optical fiber 3 (in the case where the tip can be divided in the feeding direction The advantages of the first embodiment are the same as those of the first embodiment.

〔The invention's effect〕

As described above, the optical fiber static electricity removing device according to the present invention includes at least one conductive member having a pointed end disposed close to the optical fiber and the other end grounded.
Or a grounded set of at least one pointed tip that is comprised of a set of
And a conductive member having the other end, and
When the tip or the tip is plural, each of these tips or each of the tips is distributed and arranged in the feeding direction of the optical fiber or distributed and arranged around the optical fiber. Since the non-contact state is maintained between the optical fiber and the above-mentioned point or point, the transmission efficiency of the optical fiber decreases due to the contact of the optical fiber with the point or point, or the optical fiber Damage can be avoided, and even if there is some vibration of the optical fiber, a discharge is generated between the optical fiber and the tip or the tip, so that static electricity in the optical fiber can be effectively removed. In addition, when the plurality of tips or the plurality of tips are distributed around the optical fiber and can be divided in the feeding direction, the work of wire-wrapping the optical fiber becomes easy, and the working efficiency is reduced. Can be improved.

Therefore, the present invention can remove the static electricity of the optical fiber without deteriorating the transmission characteristics of the optical fiber due to the non-contact and reduce the possibility of deteriorating the aesthetic appearance, thereby enabling stable operation. An apparatus for removing static electricity for fibers can be provided.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention (corresponding to claim [1]).
1 is a cross-sectional view of an optical fiber static electricity removing device according to the first embodiment. FIG. 2 shows a second embodiment of the present invention (corresponding to claim [4]).
1 is a cross-sectional view of an optical fiber static electricity removing device according to the first embodiment. 1.2 conductive member, 11 point, 21 point, 12/22 other end, 3 optical fiber, 4 winding bobbin, 5 pulley.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H05F 3/02 H05F 3/02 F

Claims (8)

(57) [Claims] 1. One end (11) is pointed and the other end (12)
Is a set having at least one conductive member (1) that is grounded, and the point (11) is disposed near an optical fiber fed overhead. . 2. The method according to claim 1, wherein the plurality of tips are provided in a plurality, and each of the plurality of tips is distributed in a direction in which the optical fiber is fed. ]
The static electricity removing device for an optical fiber described in the above. 3. The light according to claim 1, wherein said plurality of tips (11) are plural, and each of said plurality of tips (11) is distributed around said optical fiber. Fiber static eliminator. 4. At least one pointed end (21),
And a conductive member (2) having two other ends (22) to be grounded, wherein the point (21) is disposed near an optical fiber fed overhead. apparatus. 5. The apparatus according to claim 1, wherein said plurality of tips are formed in a plurality, and each of said plurality of tips is distributed in a direction in which said optical fiber is fed. The static electricity removing device for optical fibers according to [4]. 6. A method according to claim 4, wherein the plurality of sharp ends are plural, and each of the plurality of sharp ends is distributed around the optical fiber. Static eliminator for optical fiber. 7. The static electricity removing device for an optical fiber according to claim 3, wherein a plurality of said pointed ends (11) can be divided in a direction along a feeding direction of said optical fiber. 8. An apparatus for removing static electricity for an optical fiber according to claim 6, wherein a plurality of said pointed ends (21) can be divided in a direction along a feeding direction of said optical fiber. .