JPH08110417A - Method for taking up coated optical fiber - Google Patents

Abstract

PURPOSE: To prevent the generation of a hindrance in subsequent stages of letting off by well taking up a coated optical fiber on a take-up bobbin while removing the static electricity thereof. CONSTITUTION: The charge voltage impressed by a letting-off side charging device 22A is so controlled that the potential of the coated optical fiber 10 attains zero on the take-up bobbin 14 according to the potential of the coated optical fiber 10 measure by a letting-off side potential measuring sensor 30A installed be low a reel 12C arranged just before the take-up bobbin 14 and a take-up side potential measuring sensor 30B installed right above the take-up bobbin 14. The charge voltage impressed by a take-up side charging device 22B is so controlled that the potential of the coated optical fiber 10 on the take-up bobbin 14 attains zero according to the potential of the coated optical fiber 10 on the take-up bobbin 14 measured by the take-up side potential measuring sensor 30B installed right above the take-up bobbin 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a winding method of an optical fiber core wire for winding an optical fiber core wire or an optical fiber core wire on a winding bobbin for screening or shipping. Is.

[0002]

2. Description of the Related Art Generally, an optical fiber strand is processed by spinning a preform while melting it in a high temperature heating furnace of several thousand degrees Celsius or more, and then spinning the spun strand with a thermosetting silicone resin, an ultraviolet curable resin, or It is manufactured by coating it with a thermoplastic resin or the like to provide a buffer layer, and finally winding it up on a bobbin. The optical fiber wire manufactured in this manner or the optical fiber core wire manufactured from this optical fiber wire (hereinafter, referred to as an optical fiber core wire) is then subjected to quality confirmation such as strength and quality assurance. As a screening for that purpose, a guide member, such as a reel, applies a tensile load and is guided while being drawn and rewound on another winding bobbin.

As described above, the optical fiber core wire is wound around the bobbin in various steps, and especially when the optical fiber core wire is wound around another bobbin for screening,
When passing through a guide member such as a reel or being wound on a take-up bobbin, frictional contact with a member for taking up such a reel or a take-up bobbin causes static electricity in which plus and minus are mixed. appear.

[0004]

When static electricity is generated in the optical fiber core wires in this way, if the polarities are the same, the optical fiber core wires repel each other, and There is a problem that the winding state on the bobbin is not stable. Specifically, the optical fiber core wires are locally entangled or intersected with each other to cause twill, or, as shown in FIG. 12, the optical fiber core wires 10 are locally lifted and aligned. If it is not wound up, it may stick out from the proper position and cause a kink, or it may bite or collapse.

When the optical fiber core wire is wound in such a state, there is a possibility that it may cause a trouble when the optical fiber core wire is unreeled later from the bobbin for shipping or laying. Further, if the winding state of the optical fiber core wire around the winding bobbin is poor, the winding tension is partially changed when wound with unevenness, and twill and kink are generated. In this state, lateral pressure is locally applied to the optical fiber core wire.
Therefore, the optical fiber core wire affects its characteristics depending on the winding state, and not the characteristics of the optical fiber core wire itself in screening, but the transmission characteristics caused by the winding state, the characteristics such as strength are measured, In addition to the problem that the characteristics of the optical fiber core wire cannot be accurately measured, rewinding is performed again to check whether the abnormal part is the same part and whether the abnormality is due to the winding state or the optical fiber core wire. There was a drawback that it was time-consuming to judge whether it was due to its own characteristics. Furthermore, if the winding condition is bad,
When shipping the optical fiber core wire, there arises a problem that it has to be rewound again. In these cases, it is conceivable to spray ionized air on the winding surface of the winding bobbin to remove static electricity.However, this method does not affect static electricity to the extent that it does not affect the normal winding tension of the optical fiber core wire. However, there is a drawback that kinks cannot be sufficiently prevented.

An object of the present invention is to avoid the above-mentioned drawbacks and to eliminate static electricity generated in the optical fiber core wire to prevent repulsion of the optical fiber core wire during winding to cause kinks or the like. (EN) Provided is a method for winding an optical fiber core wire which prevents the optical fiber core wire from being wound onto a winding bobbin and which does not hinder subsequent processes such as feeding and characteristic measurement. .

[0007]

As a means for solving the above problems, the present invention is an optical fiber for taking up an optical fiber core wire while guiding it by a guide member such as a reel and winding it on a take-up bobbin. In the winding method of a core wire, the winding bobbin is grounded, and a winding voltage is applied to the optical fiber core wire while winding the optical fiber core wire while applying a charging voltage to the optical fiber core wire. The present invention provides a method for winding an optical fiber bare fiber, which is characterized in that

Further, according to the present invention, in the above-mentioned means for solving the problems, the potential of the optical fiber core wire on the surface of a contact member such as a bobbin with which the optical fiber core wire comes into contact is measured, and the measured value of this potential is used. Accordingly, there is provided a winding method for an optical fiber core wire, which is characterized in that the charging voltage is controlled so that the potential of the optical fiber core wire becomes 0 or near 0 on or near the winding bobbin. It is a thing.

[0009]

As described above, when a charging voltage is applied to the optical fiber core wire during winding, the electric potential of the optical fiber core wire wound in frictional contact with the guide member or the like due to this charging is wound on the winding bobbin. Since the static electricity can be forcibly approached to 0 and the static electricity can be removed, the optical fiber bare wire is not repulsed, and is wound up well on the winding bobbin. In particular, when the electric potential of the optical fiber core wire located on the surface of a contact member such as a reel or bobbin is measured and the charging voltage applied to the optical fiber core wire is controlled according to the measured value of the electric potential, the winding bobbin Static electricity can be reliably removed by more accurately bringing the potential of the optical fiber core wire near the winding bobbin or near the winding bobbin closer to 0, so that the reliability of the winding accuracy is further improved. In addition, it is possible to prevent the charging voltage from being excessively high and damaging the coating of the optical fiber core wire.

[0010]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of a winding method of the present invention.
The optical fiber core wire 10 is taken up while being guided by a reel 12, which is a guide member, and wound on a winding bobbin 14. In the embodiment shown in FIG. 1, the optical fiber core wire 1
A state in which the optical fiber core wire 10 is wound for screening to confirm and guarantee quality such as 0 strength is shown. In the present invention, the optical fiber core wire 10 indicates both the optical fiber core wire and the optical fiber core wire as described above, and the present invention refers to either the optical fiber core wire or the optical fiber core wire. It can also be used for winding.

In the embodiment shown in FIG. 1, more specifically, a feeding bobbin 16 for feeding the optical fiber core wire 10 is provided.
And two capstans 18A and 18B that are rotationally driven to pull the optical fiber core wire 10 and guide the optical fiber core wire 10 that is arranged before and after these capstans 18A and 18B and immediately after the feeding bobbin 16. Reel 12A to 1
2C is provided, and the optical fiber bare fiber 10 is wound by these winding members. That is, the optical fiber core wire 10 is delivered from the delivery bobbin 16, is guided by the reel 12, and is taken up by the capstan 18.
Finally, it is wound on the winding bobbin 14.

As described above, the embodiment of FIG. 1 shows a state in which screening rewinding is performed to ensure the strength of the optical fiber core wire 10. Therefore, in this embodiment, the optical fiber is used. A load setting reel 20 that applies a predetermined load to the core wire 10 is provided. As shown in FIG. 1, the load setting reel 20 includes two capstans 1
It is arranged between 8A and 18B and has a role of adding resistance to the optical fiber core wire 10 and testing the strength of the optical fiber core wire 10. However, the winding method of the present invention is not limited to the winding of the optical fiber core wire 10 for this screening, and can be widely applied as long as the optical fiber core wire 10 is wound. In addition, the present invention may be applied to other cases, for example, when performing divided winding or rewinding for shipping.

In the present invention, as shown in FIG. 1, the winding bobbin 14 is grounded, and a charging voltage is applied to the optical fiber core wire 10 while the optical fiber core wire 10 is being wound. The fiber core wire 10 is wound on the winding bobbin 14.
Specifically, in the embodiment shown in FIG. 1, a charging device 22 is provided above the feeding bobbin 16 and the charging device 22 charges the optical fiber core wire 10 immediately after leaving the feeding bobbin 16.

The charging device 22, as shown in FIG.
A substantially notched cylindrical device body 2 arranged so as to cover the traveling path of the optical fiber core wire 10 to which a charging voltage should be applied.
4, a plurality of charging terminals 26 mounted on the inner peripheral wall of the device body 24 and surrounding the optical fiber core wire 10 from the circumferential direction, and supporting the device body 24 and being connected to a power source (not shown). The charging terminal 26 has a supporting portion 28 that conducts electricity. The charging device 22 applies a positive or negative DC high voltage to the optical fiber core wire 10. In addition,
In FIG. 2, reference numeral 29 indicates a notch formed to pass the optical fiber core wire 10 into the charging device 22.

When a high DC voltage is applied to the optical fiber core wire 10 by the charging device 22 as described above, air, the reel 12, the load setting reel 20, the capstan 1 are wound during winding.
The electric potential of the charged optical fiber core wire 10 is forcibly approached to 0 by frictionally contacting the contact member 8 or the like, and the static electricity charged in the optical fiber core wire 10 can be removed.
The optical fiber core wire 10 does not repel, and the optical fiber core wire 10 can be wound well on the winding bobbin 14.

In this case, as shown in FIG. 1, the contact member with which the optical fiber core wire 10 comes into contact (in the embodiment shown in FIG. 1, the reel 12C arranged immediately before the winding bobbin 14).
The potential of the optical fiber core wire 10 on the surface of the optical fiber core wire 10 is measured by the potential measuring sensor 30, and the potential of the optical fiber core wire 10 is set to 0 or in the vicinity thereof according to the measured value of this potential. It is preferable to control the charging voltage. That is, the positive / negative and the value of the charging voltage to be applied are controlled so that the potential of the optical fiber core wire 10 becomes 0 or in the vicinity thereof according to the charging potential of the optical fiber core wire 10. In this case, the potential of the optical fiber core wire 10 on the winding bobbin 14 becomes a problem in order to improve the winding state. Therefore, the optical fiber element on or near the winding bobbin 14 becomes a problem. The potential of the core wire 10 is controlled to be 0 or near 0.

As shown in FIG. 1, the potential measuring sensor 30 is installed below the reel 12C arranged immediately before the winding bobbin 14, and the potential of the optical fiber core wire 10 passing through this reel 12C. Is measured, and the output value 32 connected to the potential measuring sensor 30 monitors the measured value of the potential (that is, the measured charging voltage). Then, in accordance with the measured value of the monitored potential, the output from the output device 32 is fed back to the charging device 22 while confirming the winding state around the winding bobbin 14, and the charging voltage applied by the charging device 22 is changed to The electric potential of the fiber core wire 10 is controlled to be 0 or near 0.

Therefore, at the beginning of winding, the potential measuring sensor 3
If the charging voltage of the optical fiber core wire 10 on the reel 12C measured by 0 is, for example, −20 kV,
The optical fiber core wire 10 is a reel 12 or a load setting reel 2
0, and it means that -20 kV is charged while passing through the capstan 18. Therefore, by applying a charging voltage of around +20 kV in advance immediately after exiting the payout bobbin 16, if it comes in front of the take-up bobbin 14. In addition, the potential of the optical fiber core wire 10 becomes 0 or in the vicinity thereof, the static electricity is sufficiently removed, and the optical fiber is wound onto the winding bobbin 14 well. After that, the optical fiber core wire 10 measured on the reel 12C
If the potential is 0, the charging voltage of +20 kV may be continuously applied. On the contrary, if an error of, for example, -2 kV occurs, the charging voltage to be applied is increased by +2 kV and corrected to +22 kV. By doing the reel 12
The potential of the optical fiber core wire 10 on C can be continuously maintained in a state of approaching zero.

In this specific example, when the charging voltage of the optical fiber core wire 10 is -20 kV, the charging voltage of +20 kV, which is exactly 0 in ±, is applied.
The charging voltage to be applied is not necessarily limited to this +20 kV, and may be determined in consideration of the influence of other electrostatic factors such as air friction received by the optical fiber core wire 10 after passing through the reel 12C. it can. In this case, it is possible to deal with this by using arithmetic processing means such as a circuit for arithmetically processing these other various electrostatic factors for the output device 32 and the like. This also applies to the portions where numerical values are specifically described in the following description of the embodiments of the present invention.

The first part of the optical fiber core wire 10 wound up has already passed through the charging device 22,
After that, there is no opportunity to apply the controlled charging voltage until the potential measurement sensor 30 is reached, but even if the appropriate charging voltage is applied in advance at the beginning of winding, or even if the charging voltage is not applied, the winding voltage is not applied. Since the bobbin 14 is grounded as shown in FIG.
By applying a controlled charging voltage to the subsequent optical fiber core wire 10 by means of this, this charging voltage is applied to the winding bobbin 1
Since it escapes through the ground of No. 4, the charging voltage also runs at the beginning of winding, and static electricity is removed to some extent.

As described above, when the electric potential of the optical fiber core wire 10 located on the surface of the reel 12C is measured and the charging voltage applied to the optical fiber core wire 10 is controlled according to the measured value of the electric potential, the winding is performed. Since the electric potential of the optical fiber core wire 10 on the take-up bobbin 14 or in the vicinity of the take-up bobbin 14 can be brought closer to 0 more accurately and the electric potential can be stabilized, static electricity can be reliably removed, so that the take-up accuracy is reliable. The property can be further improved, and the charging voltage can be prevented from being excessively high and damaging the coating of the optical fiber core wire.

Although the charging device 22 is shown in FIG. 2 to have a charging terminal 26 arranged in the circumferential direction of the optical fiber core wire 10, the charging device 22 is not limited to this, and for example, As shown in FIG. 3, the optical fiber core wire 10
It is also possible to use the charging device 22 in which the charging terminal 26 is arranged so as to charge the battery from above and below. In addition, these charging devices 22
This form is similarly applied to the charging device 22 used in the second and subsequent embodiments described below. Further, in this embodiment, the potential measuring sensor 30 is installed below the reel 12C arranged immediately before the winding bobbin 14, and
The electric potential of the optical fiber core wire 10 on the surface of 2C is measured. This is because the optical fiber core wire 10 makes frictional contact with these contact members while passing through the reel 12, the capstan 18, etc. Therefore, the electric potential of the optical fiber core wire 10 is finally measured on the reel 12C through which the optical fiber core wire 10 passes so that the electric potential of the optical fiber core wire 10 is controlled so as to approach 0. Because it is suitable.

Next, a second embodiment of the present invention will be described. In this embodiment, as shown in FIG.
2 is arranged immediately before the winding bobbin 14, and immediately before being wound on the winding bobbin 14, a charging voltage is applied to the optical fiber core wire 10 to remove static electricity. Thus, the charging device 22
The position of the feeding bobbin 16 is not always the same as shown in FIG.
It is not limited to just above, but the optical fiber core wire 1
An appropriate position can be selected according to the charged state of 0.

In the second embodiment shown in FIG. 4, the winding bobbin 14 directly affects the winding state of the optical fiber core wire 10 and the electric potential of the optical fiber core wire 10 is the most problematic. Immediately before, the electric potential of the optical fiber core wire 10 is stabilized by applying a charging voltage to remove static electricity, so that the winding state of the optical fiber core wire 10 around the winding bobbin 14 can be more reliably performed. Can be good.

In the second embodiment, as shown in FIG. 4, the electric potential measuring sensor 30 installed below the reel 12C immediately before the winding bobbin 14 causes the reel 1 to rotate.
An output device 32 that measures the electric potential of the optical fiber core wire 10 passing through 2C and is connected to the electric potential measuring sensor 30.
The charging voltage measured by is monitored. Then, according to the monitored charging voltage, the control signal is input from the output device 32 to the charging device 22 while confirming the winding state on the winding bobbin 14, and the charging voltage applied by the charging device 22 is changed by the optical fiber. The electric potential of the core wire 10 is controlled to be 0 or near 0.

Therefore, when the charging voltage of the optical fiber core wire 10 on the reel 12C measured by the potential measuring sensor 30 is, for example, -20 kV, the winding bobbin 1
By applying a charging voltage of about +20 kV to the optical fiber core wire 10 by the charging device 22 immediately before 4, the charging voltage of the optical fiber core wire 10 is just the winding bobbin 1
On the top of Fig. 4, since it approaches 0 kV by subtraction (potential becomes 0 or its vicinity), static electricity is sufficiently removed, and the winding bobbin 1
It is well wound up to 4.

Next, a third embodiment of the present invention will be described. In this embodiment, as shown in FIG. 5, when the charging device 22 is installed directly above the feeding bobbin 16, the potential measuring sensor 30 is provided. 1 is installed directly above the take-up bobbin 14, and is applied right above the pay-out bobbin 16 according to the measured value of the potential of the optical fiber core wire 10 located on the surface of the take-up bobbin 14. It controls the charging voltage. As described above, if the output is fed back to the charging device 22 in accordance with the measured value (that is, the charging voltage) of the potential of the optical fiber core wire 10 on the winding bobbin 14 to appropriately control the charging voltage, it will be described later. Winding bobbin 1
It is possible to further stabilize the potential of the optical fiber core wire 10 on the optical fiber 4.

In the third embodiment, the potential measuring sensor 30 is installed right above the winding bobbin 14, which is the most problematic point in winding the optical fiber core wire 10 onto the winding bobbin 14 well. This is because the potential of the optical fiber core wire 10 on the take-up bobbin 14 is preferable, and it is preferable to control the charging voltage according to the charging voltage of the optical fiber core wire 10 on the take-up bobbin 14. is there. As described above, the position of the potential measuring sensor 30 is not necessarily limited to the position below the reel 12C immediately before the winding bobbin 14 as shown in FIG. It can be appropriately set according to. That is, the potential to be measured is not limited to the potential of the optical fiber core wire 10 on the surface of the reel 12C, and if appropriate, another optical fiber element on the surface of the contact member such as the take-up bobbin 14 or the capstan 18. It may be the potential of the core wire 10.

A fourth embodiment of the invention is shown in FIG.
In this embodiment, when the charging device 22 is installed immediately before the winding bobbin 14, the potential measuring sensor 30 is used.
Is installed directly above the winding bobbin 14 unlike FIG. 4,
The charging voltage applied immediately before the winding bobbin 14 is controlled. Also in this case, since the static electricity is removed by controlling the charging voltage according to the charging voltage on the winding bobbin 14, which is the most problematic, the optical fiber core wire 10 has a potential on the winding bobbin 14. The winding bobbin 14 is stably and satisfactorily wound up.

In the above-mentioned four embodiments, the charging device 22 is provided only at one position immediately above the feeding bobbin 16 or immediately before the winding bobbin 14, but the present invention is not limited to these, and FIG. As shown below, the charging device 22 may be installed in two or more places. Therefore, next, some embodiments in which the charging device 22 is provided in two or more places will be described with reference to FIG.
A description will be given with reference to the following. Specifically, in these embodiments, the charging device 22 is installed immediately above the feeding bobbin 16 and at two positions immediately before the winding bobbin 14 while applying a charging voltage to the optical fiber core wire 10. , Optical fiber core wire 10
Is wound on the winding bobbin 14.

FIG. 7 shows a fifth embodiment of the present invention. In this embodiment, a feeding side charging device 22A is provided immediately above the feeding bobbin 16 and a winding side charging device 22 is provided immediately before the winding bobbin 14.
Immediately after the respective Bs are installed and exit the feeding bobbin 16, and immediately before being wound onto the winding bobbin 14, the optical fiber core wire 10
A charging voltage is applied to remove static electricity. This fifth
In this embodiment, as shown in FIG. 7, the winding bobbin 1
No. 4 immediately before the reel 12C, the output device 32A according to the charging voltage of the optical fiber core wire 10 on the reel 12C measured by the feeding-side potential measuring sensor 30A.
The charging voltage applied by the feeding-side charging device 22A via the winding-side charging device 22A is controlled, and the optical fiber core wire on the winding bobbin 14 measured by the winding-side potential measuring sensor 30B installed directly above the winding bobbin 14 is also used. In accordance with the charging voltage of 10, the winding side charging device 22B is also supplied via the output device 32B.
The charging voltage applied by is controlled so that the potential of the optical fiber core wire 10 becomes 0 or in the vicinity thereof to remove static electricity.

As described above, the optical fiber core wire 1 is provided at two locations.
By applying the charging voltage to 0, the accuracy of winding the optical fiber core wire 10 around the winding bobbin 14 can be further improved. Specifically, for example, first, as a result of measuring the potential of the optical fiber core wire 10 on the reel 12C arranged immediately before the winding bobbin 14, the measured value of this potential is +.
Since it was 30 kV, -30 kV is applied to the optical fiber core wire 10 immediately after leaving the payout bobbin 16 by the payout side charging device 22A so that the potential of the optical fiber core wire 10 on the winding bobbin 14 becomes exactly 0. Is applied, the potential of the optical fiber core wire 10 measured on the winding bobbin 14 is actually 0 due to some other cause such as friction.
Instead, if there is an error of +2 kV in the potential,
Optical fiber bare wire 1 measured on the winding bobbin 14.
According to the charging voltage of 0, by the winding side charging device 22B,
By further applying a charging voltage of −2 kV immediately before the winding bobbin 14, the potential error of the optical fiber core wire 10 is corrected, and the potential of the optical fiber core wire 10 on the winding bobbin 14 is further increased. Exactly close to 0, static electricity can be sufficiently removed. Further, when a charging voltage is applied to the optical fiber core wire 10 just above the feeding bobbin 16 and immediately before the winding bobbin 14, the optical fiber core wire 10 is charged.
Even when the winding start portion of the winding start portion 22A is passed through the feeding side charging device 22A without applying the charging voltage, the winding side charging device 22B then applies the charging voltage to the winding start portion. Static electricity can be removed by correcting the electric potential.

FIG. 8 shows a sixth embodiment of the present invention. In this embodiment, an optical fiber core on the surface of the take-up bobbin 14 is provided by an electric potential measuring sensor 30 arranged immediately above the take-up bobbin 14. The potential of the wire 10 is measured, and the charging voltage applied by the feeding side charging device 22A and the winding side charging device 22B is controlled according to the measured value of the potential (that is, the measured charging voltage), and the optical fiber element is controlled. The static electricity of the core wire 10 is removed. That is, this embodiment is similar to the fifth embodiment shown in FIG.
Unlike the embodiment described above, the optical fiber bare wire 10 is provided only at one place.
Is measured, and the charging voltage is controlled according to the charging voltage of the optical fiber core wire 10 measured at this one location (immediately above the winding bobbin 14 in the sixth embodiment). . In this embodiment, in accordance with the charging state of the optical fiber core wire 10 on the winding bobbin 14, the feeding side charging device is set so that the potential of the optical fiber core wire 10 becomes 0 on the winding bobbin 14. 22A, a charging voltage is applied, and then, when there is an error in the potential of the optical fiber core wire 10 measured on the winding bobbin 14, a further charging voltage is applied by the winding side charging device 22B, The error is corrected, the potential of the optical fiber core wire 10 is brought closer to 0 more accurately, and the static electricity is removed.

FIG. 9 shows a seventh embodiment of the present invention. In this embodiment, the electric potential measuring sensor 30 installed below the reel 12C arranged immediately in front of the winding bobbin 14 causes the electric power to be measured on the reel 12C. Of the optical fiber core wire 10 is measured, and the charging voltage applied by the feeding side charging device 22A and the winding side charging device 22B is controlled according to the measured charging voltage to control the optical fiber core wire 10 The static electricity of is removed. In this embodiment, a charging voltage is applied by the feeding side charging device 22A according to the charging state of the optical fiber core wire 10 on the reel 12C, and then the reel 12 is charged.
When there is an error in the potential of the optical fiber core wire 10 measured on C, a charging voltage is further applied by the winding side charging device 22B according to the measured value of the potential measured on this reel 12C. By doing so, this error is corrected so that the potential of the optical fiber core wire 10 on the winding bobbin 14 becomes zero, and the static electricity is removed.

FIG. 10 shows an eighth embodiment of the present invention,
In this embodiment, the electric potential of the optical fiber core wire 10 on the reel 12C is measured by the feeding side electric potential measuring sensor 30A installed below the reel 12C arranged immediately before the winding bobbin 14. The winding side potential measuring sensor installed directly above the winding bobbin 14 controls the charging voltage applied by the feeding side charging device 22A according to the measured charging voltage of the optical fiber core wire 10 on the reel 12C. The potential of the optical fiber core wire 10 on the winding bobbin 14 is measured by 30B, and the feeding side charging is performed from the output device 32B according to the measured charging voltage of the optical fiber core wire 10 on the winding bobbin 14. Device 22A and winding side charging device 2
2B, the output is fed back, and the charging voltage applied by the feeding side charging device 22A and the winding side charging device 2
The charging voltage applied by 2B is applied to the optical fiber core wire 10
The static electricity is removed by controlling the electric potential of to be 0 or in the vicinity thereof.

In this embodiment, the feeding side charging device 2
By feeding back the output according to the charging voltage of the optical fiber core wire 10 at two places on the reel 12C and the take-up bobbin 14 to 2A, the potential on the reel 12C and the take-up bobbin which becomes the most problematic. In consideration of an error from the potential on the wire 14, the charging voltage applied by the feeding-side charging device 22A is controlled so that the potential of the optical fiber core wire 10 on the winding bobbin 14 becomes 0 or in the vicinity thereof. However, if the electric potential of the optical fiber core wire 10 on the winding bobbin 14 deviates from 0 or the vicinity thereof nevertheless and an error occurs in the electric potential, the error is further wound on the winding side charging device 22B. The output according to the measured value of the potential of the optical fiber core wire 10 on the take-up bobbin 14 (that is, charging potential) is fed back, and the optical fiber core wire 1 on the take-up bobbin 14 is fed by the take-up side charging device 22B. And a controlled charging voltage in response to the charge voltage application, by correcting, winding bobbin 1
The electric potential of the optical fiber core wire 10 on 4 is brought closer to 0 more accurately, and the static electricity is surely removed. In this case,
It should be applied by the feeding side charging device 22A in accordance with two outputs of the measured value of the electric potential of the optical fiber core wire 10 on the reel 12C and the measured value of the electric potential of the optical fiber core wire 10 on the winding bobbin 14. This can be dealt with by providing an arithmetic processing unit or the like for calculating the charging voltage.

FIG. 11 shows a ninth embodiment of the present invention,
In this embodiment, the potential of the optical fiber core wire 10 on the reel 12C is measured by the feeding side potential measuring sensor 30A installed below the reel 12C arranged immediately before the winding bobbin 14, and this measurement is performed. The output device 32A according to the charging voltage of the optical fiber core wire 10 on the reel 12C
From this, the output is fed back to the feeding side charging device 22A and a control signal is input to the winding side charging device 22B.
The charging voltage applied by the feeding-side charging device 22A and the charging voltage applied by the winding-side charging device 22B are controlled, and the winding-side potential measuring sensor 30B installed right above the winding bobbin 14 causes the winding bobbin to measure. The electric potential of the optical fiber core wire 10 on 14 is measured, and the winding side charging device 22B is output via the output device 32B according to the measured charging voltage of the optical fiber core wire 10 on the winding bobbin 14. By controlling the charging voltage to be applied, the electric potential of the optical fiber core wire 10 is set to 0 on the winding bobbin 14 or in the vicinity thereof to remove static electricity.

In this embodiment, the winding side charging device 2
The output corresponding to the charging voltage of the optical fiber core wire 10 at two positions on the reel 12C and the winding bobbin 14 is fed back to 2B or a control signal is input to the reel 1B.
From the measured value of the electric potential of the optical fiber core wire 10 measured on 2C, the error still occurred even when the charging voltage is applied by the feeding side charging device 22A is read, and the winding bobbin 14
From the measured value of the potential of the upper optical fiber core wire 10, the optical fiber core wire 1 is finally wound on the winding bobbin 14.
By taking into account these two errors by reading the error of the potential generated at 0, the winding side charging device 22
By controlling the charging voltage to be applied by B, the winding bobbin 1
The electric potential of the optical fiber core wire 10 on 4 is brought closer to 0 more accurately, and the static electricity is surely removed. In this case as well, in the winding side in accordance with two outputs of the measured value of the potential of the optical fiber core wire 10 on the reel 12C and the measured value of the potential of the optical fiber core wire 10 on the winding bobbin 14. Charger 22B
It is possible to deal with this by providing an arithmetic processing unit or the like for calculating the charging voltage to be applied.

The installation location and combination of the feeding side charging device 22A, the winding side charging device 22B, and the potential measuring sensor 30 are not limited to those in the embodiments shown in FIGS. Other selections are possible as long as the potential of the optical fiber core wire 10 on the bobbin 14 can be brought close to zero. In the embodiment shown in FIGS. 7 to 11 described above, the charging device 22 and the potential measuring sensor 30 are
Both of them are provided only at two places, but it is needless to say that they may be provided at three or more places, respectively, if they are effective in removing static electricity from the optical fiber core wire 10.

Next, an experimental example relating to the present invention will be described in comparison with a comparative example relating to the prior art. In addition, all the following experimental examples were performed in the state shown in FIG.

[0041]

[Table 1]

Table 1 shows a case where the optical fiber core wire 10 is wound by two experimental examples related to the present invention and an experimental example and a comparative example related to the prior art in which a charging voltage is not applied to the optical fiber core wire 10. , Optical fiber core wire 1
The relationship between the charging state of 0 and the charging voltage applied by the charging device 22 and the winding state of the winding bobbin 14 is shown. In each of these experimental examples, experimental examples and comparative examples, an ultraviolet curable resin layer optical fiber wire having a total length of 50 km was wound on a winding bobbin 14 for screening at a rewinding speed of 200 m / min. .

As a result, as shown in Table 1, in the comparative example relating to the prior art, the optical fiber element wire is the winding bobbin 1
The reel 12C installed immediately before 4 is charged with +12 kV, and finally the winding bobbin 14 is charged with +10 kV. When the winding bobbin 14 is wound, a twill and a kink are generated. It rewound again. On the other hand, in the experimental example, in consideration of the static electricity charged in the optical fiber strand when passing through the load setting reel 20, the reel 12, etc.,
As shown in Table 1, −18 kV immediately above the feeding bobbin 16
Immediately before the winding bobbin 14, the charging voltage of the optical fiber wire on the reel 12C arranged immediately before the winding bobbin 14 was -3 kV, which was in the vicinity of 0, as a result of being charged. Then, when it is wound on the winding bobbin 14 as it is without applying a charging voltage to the optical fiber,
Finally, the charging voltage of the optical fiber strand on the winding bobbin 14 was +2 kV. At this time, the winding state of the optical fiber wire around the winding bobbin 14 was good.

In the experimental example, as shown in Table 1,
As a result of not applying the charging voltage directly above the feeding bobbin 16, the charging voltage of the optical fiber strand on the reel 12C arranged immediately before the winding bobbin 14 was +12 kV. Therefore, when a charging voltage of -14 kV was applied to the optical fiber strand just before the winding bobbin 14 so that the potential of the optical fiber strand on the winding bobbin 14 was 0 or in the vicinity thereof, The charging voltage of the optical fiber strand on the take-up bobbin 14 was -1 kV, and the winding state of the optical fiber strand around the take-up bobbin 14 was good. As described above, when the optical fiber element wire is wound by the winding method of the present invention, the static electricity of the optical fiber element wire is sufficiently removed and the winding bobbin of the optical fiber element wire is compared with the prior art shown in the comparative example. It can be seen that the winding state around 14 is definitely improved.

Next, other experimental examples and comparative examples relating to the present invention will be described.

[0046]

[Table 2]

Table 2 shows a case where the optical fiber core wire 10 is wound by another experimental example or an experimental example related to the present invention and a comparative example related to the prior art in which a charging voltage is not applied to the optical fiber core wire 10. Of the optical fiber core wire 10
3 shows the relationship between the charging state of No. 1 and the charging voltage applied by the charging device 22 and the winding state around the winding bobbin 14. In these experimental examples, experimental examples, and comparative examples, specifically, the optical fiber core wire 1 to be wound up is used.
0 is different from the experimental example, experimental example and comparative example shown in Table 1, and the nylon layer optical fiber core wire is 2
It was wound on a winding bobbin 14 for screening at a winding speed of 00 m / min. That is, while the experimental example shown in Table 1 is an experimental example relating to the optical fiber,
In the experimental example shown in Table 2, the winding state when the optical fiber core wire is wound on the winding bobbin 14 by the winding method of the present invention is examined.

As a result, as shown in Table 2, in the comparative example related to the prior art, the optical fiber core wire is the winding bobbin 1.
4 is charged to +50 kV on the reel 12C arranged immediately before and is finally charged to +75 kV on the winding bobbin 14, and the winding state of the optical fiber core wire around the winding bobbin 14 is twilled. It occurred and then fell into a state where the optical fiber core wire could not be paid out. On the other hand, in the experimental example,
Considering the static electricity that the optical fiber core will be charged,
As a result of applying a charging voltage of -60 kV directly above the feeding bobbin 16, the reel 12 arranged immediately before the winding bobbin 14
Since the charging voltage of the optical fiber core wire on C was −2 kV, the optical fiber core wire was wound around the winding bobbin 14 as it was without applying a charging voltage to the optical fiber core wire immediately before the winding bobbin 14. When I took it, finally bobbin 1
The charging voltage of the optical fiber core on No. 4 was +3 kV. At this time, the winding state of the optical fiber core wire around the winding bobbin 14 was good.

Further, in the experimental example, as shown in Table 2,
Since the charging voltage was not applied immediately above the delivery bobbin 16, the charging voltage of the optical fiber core wire on the reel 12C arranged immediately before the winding bobbin 14 was +50 kV. Therefore, when a charging voltage of −55 kV was applied to the optical fiber core wire immediately before the winding bobbin 14 so that the potential of the optical fiber core wire on the winding bobbin 14 was 0 or in the vicinity thereof, The charging voltage of the optical fiber core wire on the take-up bobbin 14 was just 0 kV (the electric potential was 0), and the winding state of the optical fiber core wire around the take-up bobbin 14 was good. Furthermore, in the experimental example, as shown in Table 2, as a result of not applying the charging voltage directly above the feeding bobbin 16, the charging voltage of the optical fiber core wire on the reel 12C arranged immediately before the winding bobbin 14 is , Unlike the experimental example, -45k
It was V. Therefore, when a charging voltage of +51 kV is applied to the optical fiber core wire immediately before the winding bobbin 14 so that the potential of the optical fiber core wire on the winding bobbin 14 becomes 0 or in the vicinity thereof, The charging voltage of the optical fiber core wire on the bobbin 14 was +1 kV, and the winding state of the optical fiber core wire on the winding bobbin 14 was good.

As described above, even if the winding method of the present invention is used for winding the optical fiber core wire, the static electricity of the optical fiber core wire can be sufficiently removed as compared with the prior art shown in the comparative example. It is understood that the winding state of the optical fiber core wire around the winding bobbin 14 can be surely improved. Also, especially
As can be seen by comparing the experimental example with the experimental example, the winding method of the present invention, whether the optical fiber core wire 10 is positively or negatively charged, or the value of the charged potential is different,
Correspondingly enough, the electric potential of the optical fiber core wire 10 on the winding bobbin 14 can be stabilized and the static electricity can be sufficiently removed.

As can be seen from the above experimental example, the potential of the optical fiber core wire 10 on the winding bobbin 14 is not necessarily 0, but if it is in the vicinity thereof, the winding bobbin 14
The winding state can be improved. In this case, the “vicinity thereof” in the present invention preferably indicates a range within ± 5 kV, as inferred from the experimental results shown in Tables 1 and 2.

[0052]

According to the present invention, as described above, since the charging voltage is applied to the optical fiber core wire during winding,
Due to this charging, the electric potential of the optical fiber core wire is forced to approach 0 and the static electricity can be removed. Therefore, the optical fiber core wire does not repel on the winding bobbin and is wound up well on the winding bobbin. Therefore, there is a practical benefit that the subsequent processes such as feeding and characteristic measurement are not hindered. Also in this case,
In particular, since the potential of the optical fiber core wire located on the surface of the contact member such as a reel or bobbin is measured, and the charging voltage applied to the optical fiber core wire is controlled according to the measured value of this potential, Since the static electricity can be reliably removed by making the electric potential of the optical fiber core wire on or near the winding bobbin closer to 0 more accurately and stabilizing the electric potential, the reliability of the winding accuracy is further improved. In addition to being improved, it is possible to prevent the charging voltage from becoming excessively high and damaging the coating of the optical fiber core wire.

[Brief description of drawings]

FIG. 1 is a schematic view showing a state in which a winding method of the present invention is carried out.

FIG. 2 is a front view of a charging device used in the winding method of the present invention.

FIG. 3 is a front view of another embodiment of the charging device used in the winding method of the present invention.

FIG. 4 is a schematic view showing an implementation state of a second embodiment of the winding method of the present invention.

FIG. 5 is a schematic view showing an implementation state of a third embodiment of the winding method of the present invention.

FIG. 6 is a schematic view showing an implementation state of a fourth embodiment of the winding method of the present invention.

FIG. 7 is a schematic view showing an implementation state of a fifth embodiment of the winding method of the present invention.

FIG. 8 is a schematic view showing an implementation state of a sixth embodiment of the winding method of the present invention.

FIG. 9 is a schematic view showing an implementation state of a seventh embodiment of the winding method of the present invention.

FIG. 10 is a schematic view showing an implementation state of an eighth embodiment of the winding method of the present invention.

FIG. 11 is a schematic view showing an implementation state of a ninth embodiment of the winding method of the present invention.

FIG. 12 is a plan view showing a state where a kink occurs when an optical fiber core wire is wound by a conventional winding method.

[Explanation of symbols]

 10 optical fiber core wire 12A to 12C reel 14 winding bobbin 16 feeding bobbin 18 capstan 20 load setting reel 22 charging device 22A feeding side charging device 22B winding side charging device 24 device body 26 charging terminal 28 support part 30 potential measurement Sensor 30A Delivery side potential measurement sensor 30B Winding side potential measurement sensor 32, 32A, 32B Output device

Claims (2)

[Claims] 1. A winding method for an optical fiber core wire, wherein the optical fiber core wire is taken up while being guided by a guide member and wound on a winding bobbin, wherein the winding bobbin is grounded,
While applying a charging voltage to the optical fiber core wire during winding of the optical fiber core wire, the optical fiber core wire is wound around the winding bobbin. Winding method. 2. The method for winding an optical fiber core wire according to claim 1, wherein the optical fiber core wire is provided on a surface of a contact member such as a winding bobbin with which the optical fiber core wire contacts. Measuring the electric potential, and controlling the charging voltage so that the electric potential of the optical fiber core wire becomes 0 or near 0 on or near the winding bobbin according to the measured value of the electric potential. A winding method for a characteristic optical fiber core wire.