JP5944762B2 - Method and apparatus for manufacturing intermittent optical fiber ribbon - Google Patents

Description

  The present invention relates to a method for manufacturing an intermittent optical fiber ribbon and an apparatus for manufacturing an intermittent optical fiber ribbon.

  Recently, in order to reduce the diameter and weight of optical cables, increase the density, and improve workability, multiple single-core coated optical fibers are juxtaposed on the same plane, and two adjacent single-core coated optical fibers are used. An optical fiber ribbon called an intermittent type or an intermittently bonded type has been proposed in which coupling portions that couple only one another are arranged at intervals in the length direction and the width direction, respectively. Such an intermittent type optical fiber ribbon has a small bending anisotropy that is difficult to bend in the width direction as in the case of a conventional batch-coated optical fiber ribbon. The cable can be stored in a small diameter, light weight, and high density. Further, it is easy to individually branch the optical fibers from the tape core wire, and when connecting the optical fibers, the optical fibers can be arranged in parallel in a predetermined arrangement, so that there is an advantage that collective connection is possible.

  As a method for manufacturing this type of intermittent optical fiber ribbon, a method using an intermittent adhesion technique using an ultraviolet curable resin is generally used (see, for example, Patent Documents 1 to 4). However, this method has poor dimensional accuracy, and the length of the coupling portion or the non-coupling portion varies, which may adversely affect the transmission characteristics of the optical fiber. This problem becomes more prominent as the production speed increases.

  Moreover, in the optical fiber tape core wire previously bonded in the length direction by the collective coating layer, two separations are formed by using a cutting tool or the like on the coating between two adjacent single-core coated optical fibers. A technique for intermittently forming a non-bonded portion between single-core coated optical fibers is known (for example, see Patent Document 5). However, it is extremely difficult to technically form a separation portion between two single-core coated optical fibers using a cutting tool or the like, and there is a possibility of damaging the coating of the single-core coated optical fiber or the optical fiber. Further, there is a possibility that burrs are generated at the cut portion.

JP 2010-2743 A JP 2010-33010 A JP 2010-54595 A JP 2010-237292 A JP 2005-62427 A

  The present invention has been made to solve the above-described problems of the prior art, and a method capable of stably and stably producing an intermittent optical fiber ribbon having good transmission characteristics and appearance, And to provide an apparatus.

In order to achieve the above object, a method for manufacturing an optical fiber ribbon according to an aspect of the present invention includes four or more single-core coated optical fibers arranged in parallel on the same plane, and the single-core coated fiber. Manufacture of an intermittent-type optical fiber ribbon having a coupling portion that couples only two adjacent single-core coated optical fibers arranged at intervals in the length direction and the width direction of the optical fiber a method, (a) said single-core coated optical fiber is inserted into the coating die, each single on the outer periphery of the core coated optical fiber as a coating Engineering for applying an ultraviolet curable resin was irradiated with (B) an ultraviolet A first irradiation step of semi-curing the ultraviolet curable resin, (C) a step of concentrating the single-core coated optical fibers so as to be arranged in parallel on the same plane, and (D) two adjacent by a dividing jig. book of A separation portion forming step of forming a predetermined separation portion between the single-core coated optical fibers ; and (E) a step of completely irradiating the ultraviolet curable resin of the single-core coated optical fiber formed with the separation portions with ultraviolet rays. 2 irradiation steps are performed in the order of (A) to (E).

An apparatus for manufacturing an intermittent optical fiber ribbon according to an aspect of the present invention includes four or more single-core coated optical fibers arranged in parallel on the same plane, and a length of the single-core coated optical fiber. An apparatus for manufacturing an intermittent type optical fiber ribbon comprising a coupling portion that couples only two adjacent single-core coated optical fibers that are arranged at intervals in the vertical direction and the width direction, respectively. , along the production line, in order from the upstream side, (a) the single a core coated optical fibers are inserted, said coating die unit for applying a UV-curable resin on the outer periphery of each single-core coated optical fibers, (B) an ultraviolet (C) A concentrating part for concentrating so that the single-core coated optical fibers are arranged in parallel on the same plane, (D) 2 adjacent to each other Single core coated light Separating portion forming portion with a cutting tool to form a predetermined separation portion between drivers, and (E) fully cured by irradiation with ultraviolet rays to the ultraviolet curable resin was formed separating portion the single-core coated optical fiber it is characterized in further comprising a second illumination unit for.

  According to the present invention, an intermittent optical fiber ribbon having good transmission characteristics and appearance can be manufactured at high speed and stably.

It is a top view which shows roughly the structure of the manufacturing apparatus of the intermittent type optical fiber ribbon based on one Embodiment of this invention. 1 is a perspective view schematically showing a configuration of an apparatus for manufacturing an intermittent optical fiber ribbon according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. It is sectional drawing which expands and shows the principal part of the member used for one Embodiment of this invention. FIG. 5 is a cross-sectional view taken along line VV in FIG. 1. It is a top view which shows roughly the structure of the intermittent optical fiber tape core wire manufactured by one Embodiment of this invention.

  Embodiments of the present invention will be described below. Although the description will be made based on the drawings, the drawings are provided for illustration only, and the present invention is not limited to the drawings.

(Embodiment)
FIG. 1 is a plan view schematically showing the configuration of an apparatus for manufacturing an intermittent optical fiber ribbon according to an embodiment of the present invention. FIG. 2 is a perspective view schematically showing the configuration of the device. FIG. 4 is a cross-sectional view taken along line III-III in FIG. 1, and FIG. 4 is a cross-sectional view showing an enlarged main part of members constituting the apparatus for manufacturing the intermittent optical fiber ribbon shown in FIGS. 5 is a cross-sectional view taken along line VV in FIG.

  As shown in FIGS. 1 and 2, the optical fiber tape core manufacturing apparatus 1 according to the present embodiment is arranged on each outer periphery of four single-core coated optical fibers 2 in order from the upstream side along the manufacturing line. A coating die portion 10 for applying an ultraviolet curable resin, an ultraviolet irradiation portion (first irradiation portion) 20 for irradiating ultraviolet rays onto a single-core coated optical fiber 2 to which an ultraviolet curable resin is applied, and a single core irradiated with ultraviolet rays. A concentrating portion 30 for concentrating and aligning the coated optical fibers 2 in a tape shape, that is, in a state where the single-core coated optical fibers 2 are arranged in parallel on the same plane, and a single-core coated light that is concentrated and aligned in a tape shape A separation mechanism 40 having a separating jig 41 for forming a separation part (part to be a non-bonding part) 4 in the fiber 2, an ultraviolet irradiation part (second irradiation part) 50 for irradiating ultraviolet rays to the ultraviolet curable resin again, and It has. Although not shown, an optical fiber delivery unit for continuously delivering the four single-core coated optical fibers 2 is provided on the upstream side of the coating die unit 10, and on the downstream side of the second irradiation unit 50. Is further provided with a winding roller for winding up the four single-core coated optical fibers 2 and the intermittent optical fiber tape core wire 3 made of an ultraviolet curable resin coated on the outer periphery thereof. In addition, a guide roller for guiding the traveling single-core coated optical fiber 2, the single-core coated optical fiber 2 concentrated and aligned in a tape shape, or the intermittent optical fiber tape core 3 is appropriately disposed.

  As shown in FIG. 2, the coating die portion 10 includes a coating die 11 having a resin storage chamber (not shown) that stores an uncured ultraviolet curable resin therein. The entrance surface 11a and the exit surface 11b of the coating die 11 each have four optical fiber insertion holes communicating with the resin storage chamber (FIG. 2 shows only the optical fiber insertion hole 12 opening in the exit surface 11b. ) Is open. The four single-core coated optical fibers 2 sent out from the optical fiber delivery section pass through the four optical fiber insertion holes opened in the entrance surface 11a, pass through the resin storage chamber, and pass through the four optical fibers opened in the exit surface 11b. Each is sent out from the hole 12. The four optical fiber insertion holes on the entrance surface 11a and the four optical fiber insertion holes 12 on the exit surface 11b are all arranged at a predetermined interval, and the diameter of each optical fiber insertion hole 12 is It is set slightly larger than the diameter of the single-core coated optical fiber 2. Accordingly, each of the four single-core coated optical fibers 2 is sent out from each optical fiber insertion hole 12 on the exit surface 11b in a state where a thin layer of an uncured ultraviolet curable resin is provided on the outer periphery thereof.

  As shown in FIG. 2, the first irradiation unit 20 is sent from the coating die unit 10 from above and below the single-core coated optical fiber 2 provided with a thin layer of an uncured ultraviolet curable resin on the outer periphery. The ultraviolet ray is irradiated over the entire width. The 1st irradiation part 20 irradiates the ultraviolet-ray of energy amount that an uncured ultraviolet curable resin is semi-cured.

Here, “semi-cured” means that the ultraviolet curable resin is not completely cured, that is, the ultraviolet curable resin is partially crosslinked by light energy. Specifically, the state in which the gel fraction known as a quantitative parameter of the degree of cure of the ultraviolet curable resin, that is, the degree of crosslinking, is preferably in the range of 80 to 85%, more preferably 83 to 85%. If the gel fraction is less than 80%, the degree of cure of the ultraviolet curable resin is too low, so that the mechanical strength of the coating layer is remarkably reduced, and it is difficult to form the separation part 4 with high accuracy by the separation mechanism 40. On the other hand, when the gel fraction exceeds 85%, it becomes close to complete curing, the mechanical strength of the coating layer becomes high, the cutting work by the cutting jig 41 becomes difficult, and the coating or light of the single-core coated optical fiber 2 becomes difficult. May damage the fiber. The gel fraction of the ultraviolet curable resin was determined by wrapping a sample (mass W ₁ ) whose mass was measured in advance with a stainless steel wire mesh (mass W ₂ ), extracting with 90 ° C. for 24 hours using methyl ethyl ketone, and then 80 ° C. It is a value calculated by the following equation after vacuum drying for 8 hours and measuring the mass (mass W ₃ ).
Gel fraction (%) = {(W ₃ −W ₂ ) / W ₁ } × 100

  In order to set the gel fraction of the ultraviolet curable resin to 80 to 85%, although it depends on the type of the ultraviolet curable resin, the irradiation condition, the coating thickness, the oxygen concentration, etc., it is usually completely crosslinked (gel fraction of about 98). %) May be irradiated with an irradiation dose of 0.2 to 2.0% of the integrated irradiation dose required.

  From the viewpoint of making the thickness of the coating layer of the ultraviolet curable resin uniform, the first irradiation unit 20 may be arranged close to the coating die 10, that is, as close as possible to the exit surface 11 b of the coating die 11. preferable.

  In the present embodiment, the concentrating portion 30 includes a pair of concentrating pulleys 31 arranged as a concentrating jig, and passes between the pair of concentrating pulleys 31, thereby allowing the first irradiation unit 20 to pass therethrough. The four single-core coated optical fibers 2 having a thin semi-cured UV curable resin layer on the outer periphery are tape-shaped, that is, the single-core coated optical fibers 2 are arranged in parallel on the same plane. The two adjacent single-core coated optical fibers 2 are joined together via a layer made of a semi-cured ultraviolet curable resin.

  FIG. 3 shows the four single-core coated optical fibers 2 after the concentration by the concentration unit 30. As shown in FIG. 3, four single-core coated optical fibers 2 provided with a thin semi-cured UV curable resin layer 5 on the outer periphery are arranged in parallel on the same plane, It is integrally joined by the provided layer 5 made of a thin semi-cured UV curable resin (hereinafter, the four single-core coated optical fibers 2 are concentrated and integrated into an integrated optical fiber tape. Also called core 6).

  In the single-core coated optical fiber 2, for example, one or a plurality of layers of a protective coating is provided on the optical fiber with an ultraviolet curable resin, or a colored layer is further provided on the protective coating. Things are used. In this embodiment, a single-core coated optical fiber having an outer diameter of 0.25 mm, in which a primary coating 2b, a secondary coating 2c, and a colored layer 2d are sequentially coated on the optical fiber 2a, is used.

  The concentrating portion 30 can be connected to the concentrating pulley 31 if the four single-core coated optical fibers 2 provided with the layer 5 made of a thin semi-cured UV curable resin on the outer periphery as described above can be concentrated in a tape shape. Not limited to this, various conventionally known wire collecting jigs can be used. In the present embodiment, from the viewpoint that the single-core coated optical fibers 2 can be efficiently aligned and arranged, it is preferable that the concentrating angle β by the concentrating portion 30 is in the range of 1 to 15 °.

  As shown in FIG. 2, the separation mechanism 40 includes a cutting jig 41. In the present embodiment, as the cutting jig 41, a cutting needle 42 as shown in FIG. 4 and a mechanism (not shown) for moving the cutting needle 42 back and forth with respect to the integrated optical fiber ribbon 6, that is, moving up and down. The one with is used. In FIG. 2, the cutting jig 41 having only one cutting needle is shown, but a predetermined separating portion 4 can be formed between each of the four single-core coated optical fibers 2 arranged in parallel. Thus, the three parting needles 42 are provided and are configured to move up and down individually.

  As shown in FIG. 4, the cutting needle 42 has a triangular shape in which the cross-sectional shape of the tip portion 42 a (cross-sectional shape when the tip is cut in a plane parallel to the cutting direction) has a tip angle α of 20 ° or less. Those are preferred. By using the cutting needle 42 having such a shape of the tip end portion 42a, the integrated optical fiber ribbon 6 runs on the semi-cured ultraviolet curable resin layer 5 at a high speed of, for example, 200 m / min or higher. Even in such a case, it is possible to make a highly accurate cut into the semi-cured ultraviolet curable resin layer 5. Particularly preferred examples of the cutting needle 42 include those having a tip end length A of 80 to 120 μm and a tip end width B of 30 to 40 μm in FIG. 4.

  FIG. 5 shows an example of the integrated optical fiber ribbon 6 after passing through the separation mechanism 40. As shown in FIG. 5, the integrated optical fiber ribbon 6 has a separation portion 4 that separates the center two single-core coated optical fibers 2.

  The separation mechanism 40 is preferably arranged close to the concentrator 30 from the viewpoint of improving the controllability of the separator 4. Specifically, a position where the separation distance from the concentrating portion 30 (in this embodiment, the distance from the center of the concentrating pulley 31 to the cutting start position of the dividing needle 42 of the separating mechanism 40) is about 5 to 100 mm is preferable. .

  As shown in FIG. 2, the second irradiation unit 50 applies ultraviolet light over the entire width from above and below the integrated optical fiber ribbon 6 on which the predetermined separation unit 4 is formed by the separation mechanism 40. It is comprised so that an irradiation line may be irradiated. The second irradiation unit 50 irradiates ultraviolet rays having an energy amount such that the semi-cured ultraviolet curable resin layer 5 is completely cured.

  Here, “completely cured” means that the ultraviolet curable resin is cured to a complete or nearly complete state, that is, the ultraviolet curable resin is crosslinked to a completely or nearly complete state by light energy. That means. Specifically, a state in which the gel fraction measured by the same method as described for the first irradiation unit 20 is at least 95% is preferable, and 96 to 98% is more preferable. If the gel fraction is less than 95%, the degree of cure of the UV curable resin is not sufficient, so that the mechanical strength of the coating layer is lowered, and an intermittent optical fiber ribbon with sufficient transmission characteristics cannot be obtained. There is a fear. Further, uniform curing is difficult, and non-uniform stress remains, which may adversely affect the transmission characteristics of the optical fiber.

Next, the operation of the intermittent optical fiber ribbon manufacturing apparatus 1 will be described.
Four single-core coated optical fibers 2 delivered from an optical fiber delivery unit (not shown) are inserted into a coating die 11 of a coating die unit 10 and an uncured ultraviolet curable resin is applied to each outer periphery. The (Coating process)

  The four single-core coated optical fibers 2 sent out from the coating die 11 are collected by the concentrating portion 30 and arranged in parallel on the same plane, but in the meantime, the first arranged in the coating die 11 and the concentrating portion 30 are arranged. The one irradiation unit 20 irradiates ultraviolet rays, and the ultraviolet curable resin on the outer periphery of each single-core coated optical fiber is semi-cured. Thereby, from the concentrator 30, the four single-core coated optical fibers 2 are arranged in parallel on the same plane, and by the layer 5 made of a thin semi-cured ultraviolet curable resin provided on each outer periphery. The integrated optical fiber tape core 6 joined integrally is sent out. (First irradiation process)

  In the integrated optical fiber ribbon 6 sent out from the concentrator 30, a predetermined separating portion 4 is formed between two adjacent single-core coated optical fibers by the separating mechanism 40. (Separation part formation process)

  The integrated optical fiber ribbon 6 with the predetermined separation part 4 formed thereon is then irradiated again with ultraviolet rays by the second irradiation part 50, and the ultraviolet curable resin around each single-core coated optical fiber is completely cured. Is done. (Second irradiation process)

  As a result, as shown in FIG. 6, four single-core coated optical fibers 2 arranged in parallel on the same plane and the single-core coated optical fibers 2 are spaced apart in the length direction and the width direction, respectively. An intermittent optical fiber ribbon 3 having a coupling portion 7 that couples only two adjacent single-core coated optical fibers 2 that are arranged is manufactured. In FIG. 6, 8 indicates a non-bonded portion, that is, a separated portion after the ultraviolet curable resin is completely cured.

  In the present embodiment, a predetermined separation portion is formed between two adjacent single-core coated optical fibers by a separating jig for the ultraviolet curable resin in a semi-cured state, and then the ultraviolet curable resin is completely removed. Since it is cured, even if the line speed of the production line is set to a high speed of, for example, 200 m / min or more, a separation part having high dimensional accuracy and no burrs can be formed by a cutting jig, and an ultraviolet curable resin. As a result of the complete curing, an intermittent optical fiber ribbon having a transmission part with good accuracy, excellent transmission characteristics and excellent appearance is manufactured.

  The intermittent optical fiber tape core manufacturing method and manufacturing apparatus according to the present embodiment are configured such that the interval between the coupling portions (the length of the non-coupling portion; FIG. 6) that couples the same two coated optical fiber single core wires together. This is useful for the manufacture of intermittent optical fiber ribbons having a symbol P) of 50 mm or more and 150 mm or less, and the interval between the connecting portions for joining the same two coated optical fiber single fibers is 80 mm or more and 120 mm or less. Thus, it is particularly useful for manufacturing an intermittent optical fiber ribbon in which the length of each coupling portion (indicated by the symbol Q in FIG. 6) is 20 mm or more and 60 mm or less. That is, when the latter intermittent type optical fiber ribbon is made into a cable using this, the strain applied to the optical fiber when the cable is bent can be very small, and the cable can have sufficient long-term reliability. The batch connection is easy, and the cable connection workability can be improved. And according to the manufacturing method and manufacturing apparatus of the optical fiber ribbon of the present invention, the manufacturing method of the intermittent optical fiber ribbon having such excellent characteristics can be manufactured at high speed and stably. Can do.

Here, the manufacture example of the intermittent type optical fiber ribbon by this embodiment is described concretely.
(Example 1)
Using the above-described intermittent optical fiber ribbon manufacturing apparatus 1, the length Q of the coupling portion 7 that couples only two adjacent coated optical fiber single fibers and the interval P thereof are 40 mm, and An intermittent optical fiber ribbon 3 of 100 mm shown in FIG. 6 was produced. The single-core coated optical fiber has a primary coating made of a urethane acrylate UV curable resin having a Young's modulus at 23 ° C. of about 5 MPa on a quartz glass-based SM optical fiber having an outer diameter of 125 μm, and a Young's modulus at 23 ° C. of about A single-core coated optical fiber having an outer diameter of 250 μm and a secondary coating made of a urethane acrylate UV curable resin of 700 MPa was used. Further, as the ultraviolet curable resin to be coated on the outer periphery thereof, an acrylic ultraviolet curable resin having a viscosity of 14000 mPa · s measured by a cone plate viscometer at 25 ° C. measured in accordance with JIS K 6833 was used. Other manufacturing conditions are as follows.
Line speed: 200m / min
Outer diameter of optical fiber insertion hole of coating die: 356μm
Integrated irradiation amount of the first irradiation unit: 7.4 mJ / cm ²
Integrated irradiation amount of the second irradiation unit: 490 mJ / cm ²

(Examples 2 to 20)
Except for changing at least one condition of the length Q of the coupling portion 7, the interval P of the coupling portion, the linear velocity, and the integrated irradiation amount of the first irradiation unit as shown in Table 1, it is the same as in Example 1. An intermittent optical fiber ribbon was manufactured.

  Ten intermittent optical fiber ribbons obtained in each of the above examples were bundled and bundled by rough winding to produce a tape strand unit, and distortion characteristics were measured by BOTDR. At the same time, transmission loss was measured.

  Table 1 shows the measurement results of the distortion characteristics and transmission loss. Table 1 also shows the gel fraction of the coating layer made of an acrylic ultraviolet curable resin provided on the outer periphery of the single-core coated optical fiber. The gel fraction was measured for the coating layer immediately after passing through the first irradiation part and after passing through the second irradiation part.

  As is apparent from Table 1, the intermittent optical fiber ribbon according to the present embodiment has very good characteristics such as a distortion characteristic of 0.005% or less and a transmission loss of 0.200 dB / km or less.

  In the above-described embodiment, the case where an intermittent optical fiber ribbon is manufactured using four single-core coated optical fibers has been described. However, the above-described embodiment is merely presented as an example, and the scope of the invention is It is not intended to be limiting in any way. For example, the number of single-core coated optical fibers may be five or more, and the position, length, interval, and the like of a coupling portion that couples only two adjacent single-core coated optical fibers are also particularly limited. It is not a thing. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

  DESCRIPTION OF SYMBOLS 1 ... Manufacturing apparatus of an intermittent type optical fiber ribbon, 2 ... Single core coated optical fiber, 3 ... Intermittent type optical fiber tape core, 4 ... Separation part, 5 ... Semi-curing ultraviolet curing resin layer, 7 ... Bonding part , 8 ... Non-bonding part, 10 ... Coating die part, 11 ... Coating die, 12 ... Optical fiber insertion hole, 20 ... First irradiation part, 30 ... Concentration part, 41 ... Dividing jig, 42 ... Dividing needle, 42a ... tip part, 50 ... second irradiation part.

Claims (7)

Four or more single-core coated optical fibers arranged in parallel on the same plane, and two adjacent ones arranged at intervals in the length direction and the width direction of the single-core coated optical fiber, respectively. A method of manufacturing an intermittent optical fiber ribbon comprising a coupling portion that couples only single-core coated optical fibers,
(A) said single-core coated optical fiber is inserted into the coating die, as coatings Engineering for applying an ultraviolet curable resin on the outer periphery of each of the single-core coated optical fiber,
(B) a first irradiation step of irradiating ultraviolet rays and semi-curing the ultraviolet curable resin;
(C) a step of concentrating the single-core coated optical fibers so that they are arranged in parallel on the same plane;
(D) a separation portion forming step of forming a predetermined separation portion between two adjacent single-core coated optical fibers by a dividing jig ; and
(E) A second irradiation step of completely irradiating the ultraviolet curable resin of the single-core coated optical fiber having the separation portion by irradiating with ultraviolet rays.
Are manufactured in the order of (A) to (E) . A method for manufacturing an intermittent optical fiber ribbon.   The method for producing an intermittent optical fiber ribbon according to claim 1, wherein the gel fraction of the ultraviolet curable resin is 80 to 85% by the first irradiation step.   3. The intermittent optical fiber ribbon according to claim 1, wherein the dividing jig includes a dividing needle and a mechanism for moving the dividing needle forward and backward with respect to the two single-core coated optical fibers. Manufacturing method. The optical fiber tape core according to any one of claims 1 to 3 , wherein the ultraviolet irradiation in the first irradiation step is performed on the single-core coated optical fiber immediately after exiting the coating die. Wire manufacturing method. The intermittent type optical fiber ribbon is characterized in that the interval (the length of the non-bonded portion) of the coupling portion that couples the same two coated optical fiber single fibers is 80 mm or more and 120 mm or less. Item 5. A method for manufacturing an optical fiber ribbon according to any one of Items 1 to 4 . By a second irradiation step, the manufacturing method according to claim 1 or an optical fiber ribbon according to any one of the 5 gel fraction of the ultraviolet curable resin is characterized by comprising at least 95%. Four or more single-core coated optical fibers arranged in parallel on the same plane, and two adjacent ones arranged at intervals in the length direction and the width direction of the single-core coated optical fiber, respectively. An apparatus for manufacturing an intermittent type optical fiber ribbon comprising a coupling portion for coupling only single-core coated optical fibers,
Along the production line, in order from the upstream side,
(A) a coating die portion for inserting the single-core coated optical fiber and applying an ultraviolet curable resin to the outer periphery of each single-core coated optical fiber ;
(B) a first irradiation unit that irradiates ultraviolet rays and semi-cures the ultraviolet curable resin;
(C) A concentrator for collecting the wires so that the single-core coated optical fibers are arranged in parallel on the same plane;
(D) a separation portion forming portion including a dividing jig for forming a predetermined separation portion between two adjacent single-core coated optical fibers ; and
(E) A second irradiation unit that completely cures the ultraviolet curable resin of the single-core coated optical fiber in which the separation unit is formed by irradiating with ultraviolet rays.
An apparatus for manufacturing an intermittent type optical fiber ribbon, comprising:

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