TW202101052A - Intermittent bonding type optical fiber adhesive tape core wire - Google Patents

Abstract

The purpose of the present invention is to easily improve reliability and improve efficiency of work such as connection. The intermittent bonding type optical fiber tape core wire is provided with an optical fiber wire rod and a connecting part. The optical fiber wires extend in the longitudinal direction, and a plurality of optical fiber wires are arranged side by side in the width direction orthogonal to the longitudinal direction. The connection part connects optical fiber wires adjacent to each other in the width direction among the plurality of optical fiber wires. The connecting part of the intermittent bonding type optical fiber cable core wire is intermittently arranged in the length direction and the width direction. Here, the connecting part forms an inner space therein.

Description

Intermittent splicing fiber ribbon core wire

The present invention relates to an intermittent splicing type optical fiber ribbon core wire.

The intermittent splicing type optical fiber ribbon core wire includes a plurality of optical fiber wires and a connecting portion connecting the plurality of optical fiber wires. In the intermittent splicing type optical fiber ribbon core wire, a plurality of optical fiber elements are arranged side by side in the width direction orthogonal to the longitudinal direction, and the connecting portions are intermittently provided in the longitudinal direction and the width direction.

The intermittent splicing type optical fiber ribbon is different from the case of the whole coating type, because it can be easily bent, and can realize the reduction in diameter, weight reduction and high density of the optical fiber ribbon. Prior art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2003-107306 Patent Document 2: Japanese Patent Publication No. 2008-511869 Patent Document 3: Japanese Patent Laid-Open No. 2011-022477 Patent Document 4: Japanese Patent Laid-Open No. 2017-032721 Patent Document 5: Japanese Patent Laid-Open No. 2017-026754

The problem to be solved by the invention

However, in the intermittent splicing type optical fiber ribbon core wire, a large stress may be applied to the optical fiber wire at the connection portion. As a result, in the long-distance transmission of high-speed communication (10 Gbps or more), in the optical fiber as the transmission path, signal degradation may occur due to polarization mode dispersion (PMD: Polarization Mode Dispersion). In addition, damage may occur in the connecting portion due to the above-mentioned stress. As a result, it may be difficult to improve reliability.

In the intermittent splicing type optical fiber ribbon core wire, the operation of separating a plurality of optical fibers for subsequent branching is performed, and the operation of removing the connecting portion (resin coating) from the periphery of the optical fiber for connection is performed. However, in the conventional intermittent splicing type optical fiber ribbon, the above-mentioned work is not easy to perform. As a result, it may be difficult to increase the efficiency of operations such as connection.

As mentioned above, in the intermittent splicing type optical fiber ribbon core wire, it may be difficult to improve reliability and efficiency of connection work.

Therefore, an object of the present invention is to provide an intermittent splicing type optical fiber ribbon core wire that can easily achieve improvement in reliability and efficiency of connection work. Technical means to solve the problem

The intermittent splicing type optical fiber ribbon core wire of the present invention has an optical fiber line and a connecting portion. The optical fiber lines extend in the longitudinal direction, and a plurality of them are arranged side by side in the width direction orthogonal to the longitudinal direction. The connecting portion connects optical fibers adjacent to each other in the width direction among the plurality of optical fibers. The connection part of the intermittent splicing type optical fiber ribbon core wire is intermittently provided in the longitudinal direction and the width direction. Here, the connection part has an internal space formed inside. Invention effect

According to the present invention, it is possible to provide an intermittent splicing type optical fiber ribbon core wire, which can easily achieve improvement in reliability and efficiency of connection work.

Hereinafter, embodiments of the invention will be described using drawings. In addition, the invention is not limited to the content of the drawings. In addition, the drawings are schematic diagrams, and the size ratio of each part, etc., does not necessarily match the actual size ratio. In addition, the same components are denoted with the same symbols, and repeated descriptions are appropriately omitted.

[A] Structure of intermittent splicing type optical fiber ribbon core wire 1 The structure of the intermittent splicing type optical fiber ribbon core wire 1 of the embodiment will be described.

1 and 2 are schematic diagrams of the main parts of the structure of the intermittent splicing type optical fiber ribbon core wire 1 of the embodiment. Here, FIG. 1 shows the upper surface, the lateral direction is the length direction x of the intermittent splicing optical fiber ribbon core wire 1, the longitudinal direction is the width direction y of the intermittent splicing optical fiber ribbon core wire 1, and the direction perpendicular to the paper is the intermittent splicing optical fiber ribbon core wire. 1 height direction z. Fig. 2 shows a cross-section of part A-A shown in Fig. 1, the horizontal direction is the width direction y, the vertical direction is the height direction z, and the direction perpendicular to the paper surface is the length direction x.

As shown in FIGS. 1 and 2, the intermittent splicing type optical fiber ribbon core wire 1 is a flat optical fiber unit having an optical fiber 10 and a connecting portion 20. The specific content of each part constituting the intermittent splicing type optical fiber ribbon core wire 1 will be sequentially described.

[A-1] Optical fiber line 10 In the intermittent splicing type optical fiber ribbon core wire 1, the optical fiber element 10 extends in the longitudinal direction x, and a plurality of them are arranged side by side in the width direction y orthogonal to the longitudinal direction x. Here, the following case is exemplified: a first optical fiber 10a, a second optical fiber 10b, a third optical fiber 10c, and a fourth optical fiber 10d are provided as the optical fiber 10, and the plurality of optical fibers 10 are arranged side by side The ground is arranged on a plane (xy plane) along the longitudinal direction x and the width direction y.

The plurality of optical fiber wires 10 (10a to 10d) each have an optical fiber 11 and a coating film 12. In each optical fiber 10 (10a to 10d), the cross section of the optical fiber 11 is circular. The coating film 12 has a first protective film layer 121, a second protective film layer 122 and a colored layer 123, and covers the outer peripheral surface of the optical fiber 11. Here, a first protective layer 121, a second protective layer 122, and a colored layer 123 are provided on the outer peripheral surface of the optical fiber 11 in this order. The entirety of the plurality of optical fibers 10 (10a to 10d) is covered by the overall coating film 201. For example, a resin such as ultraviolet curable resin is used to form the overall coating film 201.

[A-2] Connection part 20 In the intermittent splicing type optical fiber ribbon core wire 1, the connecting portion 20 is the integral coating film 201 between the optical fibers 10 adjacent to each other in the width direction y and is connected to the optical fibers adjacent to each other in the width direction y. The part of the lines 10 between each other. Here, the connecting portion 20 is intermittently provided in the longitudinal direction x and the width direction y. By providing the connecting portion 20 in the overall coating film 201, the tape strength of the intermittent splicing type optical fiber ribbon core wire 1 can be improved, and even when a large stress is applied to the optical fiber, the connecting portion 20 can be prevented from being broken.

Specifically, between the first optical fiber line 10a and the second optical fiber line 10b, between the second optical fiber line 10b and the third optical fiber line 10c, and the third optical fiber line 10c and the fourth optical fiber line Between 10d, the connecting portion 20 and the non-connecting portion 21 are formed alternately in the longitudinal direction x, respectively. The positions of the connecting portion 20 and the non-connecting portion 21 provided between the first optical fiber 10a and the second optical fiber 10b are different from those provided on the second optical fiber 10b and the third optical fiber in the longitudinal direction x The positions of the connecting portion 20 and the non-connecting portion 21 are different between 10c. In addition, the positions of the connecting portion 20 and the non-connecting portion 21 provided between the first optical fiber 10a and the second optical fiber 10b are different from those provided on the third optical fiber 10c and the fourth optical fiber in the longitudinal direction x. The positions of the connecting portion 20 and the non-connecting portion 21 between the element wires 10d are the same. That is, between the first optical fiber 10a and the second optical fiber 10b, between the second optical fiber 10b and the third optical fiber 10c, and between the third optical fiber 10c and the fourth optical fiber 10d In between, the connecting portion 20 and the non-connecting portion 21 are arranged in a zigzag shape so as to be alternately arranged in the longitudinal direction x and the width direction y. The non-connecting portion 21 is a through hole extending in the longitudinal direction x in the overall coating film 201 and penetrating the overall coating film 201 in the height direction z (see FIG. 2 ). The connecting portion 20 is formed to be interposed between two non-connecting portions 21 (through holes) continuous in the longitudinal direction.

[A-3] Internal space SP20 An internal space SP20 is formed in the portion of the overall coating film 201 where the connecting portion 20 and the non-connecting portion 21 are provided. The internal space SP20 is a void formed by extending in the longitudinal direction x in the overall coating film 201.

Here, the internal space SP20 faces the resin in the height direction z and is covered by the resin. Furthermore, the internal space SP20 is interposed between two adjacent optical fiber wires 10 in the width direction y, and faces the coating film 12 of each optical fiber wire 10. That is, the internal space SP20 is configured to include the portion of the optical fiber 10 exposed in the internal space SP20.

[A-4] Other 3 is an enlarged cross-sectional view of the intermittent splicing type optical fiber ribbon core wire 1 of the embodiment. Here, FIG. 3 is a part of FIG. 2, which enlargedly shows a part where the third optical fiber line 10 c and the fourth optical fiber line 10 d are provided as the optical fiber line 10.

In FIG. 3, a is the maximum exposure width of the optical fiber 10, specifically, the maximum width of the part of the optical fiber 10 exposed to the internal space SP20 in the height direction z. D is the outer diameter of the optical fiber 10, specifically, the outer diameter of the coating film 12 constituting the optical fiber 10. t is the thickness of the connecting portion 20 at the center between two optical fiber elements 10 adjacent in the width direction y.

The maximum exposure width a of the optical fiber 10, the outer diameter D of the optical fiber 10, and the thickness t of the connecting portion 20 at the center between two adjacent optical fibers 10 in the width direction y are preferably satisfied The following conditional expression (1) and conditional expression (2).

When the conditional expression (1) and the conditional expression (2) are satisfied, the strip resin removal performance and the strip splitting performance can be improved, the stress applied to the optical fiber can be reduced, and the polarization mode dispersion can be reduced.

[B] Manufacturing device 50 and manufacturing method The manufacturing apparatus for manufacturing the intermittent splicing type optical fiber ribbon core wire 1 of this embodiment will be exemplified together with the manufacturing method.

4 and 5 are schematic diagrams of the main parts of the manufacturing apparatus 50 of the intermittent splicing type optical fiber ribbon core wire 1 according to the embodiment. Here, Fig. 4 is a side view. Fig. 5 is a plan view showing a part of it enlarged.

As shown in FIG. 4, the manufacturing apparatus 50 of the intermittent splicing type optical fiber ribbon core wire 1 has a mold 51, a needle 52, a rotating knife 53 and an ultraviolet irradiation device 54. Each part constituting the manufacturing apparatus 50 will be described in order.

The mold 51 supplies a plurality of optical fibers 10 arranged side by side in the width direction y to the inside by a conveying device (not shown). In addition, resin is supplied to the inside of the mold 51. For example, an ultraviolet curable resin is supplied to the inside of the mold 51. Then, in the mold 51, the periphery of the plurality of optical fibers 10 is pressed out with resin, and the resin is molded. As a result, the entire coating film 201 that covers the entire periphery of the plurality of optical fiber wires 10 is formed in an uncured state.

As shown in FIG. 4, the needle 52 is arranged such that its front end is located inside the mold 51. Here, as shown in FIG. 5, there are a plurality of needles 52, and they are arranged in the portion where the connecting portion 20 is provided in the width direction y. The needle 52 is configured to have a flow path (not shown) formed inside, and discharge fluid passing through the flow path from the tip. For the portion where the internal space SP20 is to be formed in the connecting portion 20, air is discharged from the tip of the needle 52. In the present embodiment, air is continuously discharged from the tip of the needle 52 so that the internal space SP20 extends in the entire length direction x of the overall coating film 201. As a result, the internal space SP20 is formed in the connecting portion 20.

As shown in FIG. 4, the rotating knife 53 is provided in the position where the several optical fiber 10 covered with the integral coating film 201 is conveyed from the mold 51 by the conveying apparatus (illustration omitted). The rotating knife 53 cuts a part of the entire coating film 201 of the plurality of optical fiber wires 10 that are coated and transported, and the non-connected portion 21 is formed on the entire coating film 201. Although illustration is omitted, there are a plurality of rotating blades 53 which are arranged in the portion where the non-connecting portion 21 is formed in the width direction y. Here, the rotating blade 53 has a disk shape, and a pair of notches are formed in the outer peripheral portion. The pair of notches are formed to face each other across the rotation axis of the rotary knife 53. The non-connected portion 21 is formed by cutting a part of the entire coating film 201 by the notched portion formed at the outer peripheral portion of the rotating blade 53. In addition, in the portion where the notch is not formed at the outer peripheral portion of the rotary blade 53, since the entire coating film 201 is not cut, the uncut portion functions as the connecting portion 20. Therefore, in the overall coating film 201, the connecting portions 20 and the non-connecting portions 21 are formed to be alternately arranged in the longitudinal direction x.

In the ultraviolet irradiation device 54, the plurality of optical fibers 10 covered by the overall coating film 201 pass through the rotating knife 53 and are conveyed by a conveying device (not shown). Furthermore, the ultraviolet irradiation device 54 cures the whole coating film 201 by irradiating the whole coating film 201 in an uncured state with ultraviolet rays. Thus, the intermittent splicing type optical fiber ribbon core wire 1 is completed.

[C] Summary As described above, in the intermittent splicing type optical fiber ribbon core wire 1 of the present embodiment, the connecting portion 20 connecting two optical fibers 10 adjacent to each other in the width direction y has an internal space SP20 formed therein. The details are as described later. Therefore, in this embodiment, it is possible to suppress the application of large stress on the optical fiber 10 at the connection portion 20, and therefore, it is possible to effectively prevent signal degradation caused by polarization mode dispersion (PMD). . In addition, it is possible to prevent the connection portion 20 from being broken due to the above-mentioned stress. As a result, the reliability can be improved in this embodiment.

In addition, in the intermittent splicing type optical fiber ribbon core wire 1 of the present embodiment, the operation of separating the plurality of optical fiber wires 10 for subsequent branching, and removing the connection from the periphery of the optical fiber wires 10 for connection The operation of the part 20 (resin coating) can be easily performed. As a result, in this embodiment, the efficiency of operations such as connection can be achieved.

[D] Modification The form of the internal space SP20 shown in the above-mentioned embodiment is an example, and various modifications can be applied.

6 to 11 are diagrams showing the intermittent splicing type optical fiber ribbon core wire 1 of Modification 1 to Modification 6 of the embodiment, respectively. Here, FIG. 6 to FIG. 10 are a part of FIG. 2 as in FIG. 3, and enlargedly show the part where the third optical fiber line 10 c and the fourth optical fiber line 10 d are provided as the optical fiber line 10. On the other hand, FIG. 11 shows the upper surface similarly to FIG. 1.

[D-1] Modification 1 In Modification 1, as shown in FIG. 6, two internal spaces SP20 arranged in the height direction z are interposed between two optical fibers 10 (10c, 10d) arranged adjacently in the width direction y. The two internal spaces SP20 respectively face the respective coating films 12 of the optical fiber wires 10 (10c, 10d) in the width direction y, and are configured to include two optical fiber wires 10 (10c, 10d) each exposed to the internal space SP20 part. Also in this case, the same effect as in the case of the above-mentioned embodiment can be obtained. In addition, in Modification 1, the "maximum exposure width a of the optical fiber 10" used in the conditional expressions (1) and (2) is the sum of the exposed widths of the optical fiber 10c and The total value of the exposed width of the other optical fiber line 10d is compared, and the larger one is used. In addition, in the case of manufacturing the intermittent splicing type optical fiber ribbon core wire 1 of the present modification, although illustration is omitted, for example, two needles 52 are used to locate two optical fiber elements 10 (10c) arranged adjacently in the width direction y. , 10d) between the manufacturing device 50 (refer to Figure 4). The two needles 52 may be configured to branch from one supply pipe.

[D-2] Modification 2 In Modification 2, as shown in FIG. 7, a plurality of internal spaces SP20 are interposed between two optical fibers 10 (10c, 10d) arranged adjacently in the width direction y. The plurality of internal spaces SP20 are formed by, for example, injecting an ultraviolet curable resin to which a chemical foaming agent is added from the tip of the needle 52 to foam the chemical foaming agent. In addition to this, the internal space SP20 may be formed similarly by injecting resin that has been foamed in advance. Also in this case, the same effect as in the case of the above-mentioned embodiment can be obtained. In addition, in Modification Example 2, the "maximum exposure width a of the optical fiber element 10" used in Conditional Expression (1) and Conditional Expression (2) is calculated in the same manner as in Modification Example 1.

[D-3] Modification 3 In Modification 3, as shown in FIG. 8, one internal space SP20 is interposed between two optical fibers 10 (10c, 10d) arranged adjacently in the width direction y. The inner space SP20 is configured to face the covering film 12 of one optical fiber 10d of the two optical fibers 10, and includes a portion of the one optical fiber 10d exposed in the inner space SP20. In addition, the internal space SP20 is configured not to face the other optical fiber 10c of the two optical fibers 10 (10c, 10d), and does not include the portion of the other optical fiber 10c exposed in the internal space SP20. In this modification, by adjusting the position of the tip of the needle 52, the internal space SP20 can be formed as described above. Also in this case, the same effect as in the case of the above-mentioned embodiment can be obtained.

[D-4] Modification 4 In Modification 4, as shown in FIG. 9, two internal spaces SP20 arranged in the width direction y are interposed between two optical fibers 10 (10c, 10d) arranged adjacently in the width direction y. The two internal spaces SP20 face the respective coating films 12 of the two optical fibers 10 (10c, 10d), respectively, and are configured to include portions of the two optical fibers 10 (10c, 10d) exposed to the internal space SP20. Also in this case, the same effect as in the case of the above-mentioned embodiment can be obtained. In addition, in Modification 1, the "maximum exposure width a of the optical fiber 10" used in the conditional expressions (1) and (2) is the sum of the exposed widths of the optical fiber 10c and The total value of the exposed width of the other optical fiber line 10d is compared, and the larger one is used.

[D-5] Modification 5 In Modification 5, as shown in FIG. 10, two internal spaces SP20 arranged in the width direction y are interposed between two optical fibers 10 (10c, 10d) arranged adjacently in the width direction y. The two internal spaces SP20 do not face the respective coating films 12 of the two optical fiber wires 10 (10c, 10d), and are configured to not include the portions of the two optical fiber wires 10 (10c, 10d) each exposed to the internal space SP20 . Also in this case, the same effect as in the case of the above-mentioned embodiment can be obtained.

[D-6] Modification 6 In Modification 6, as shown in FIG. 11, the internal space SP20 does not extend continuously in the longitudinal direction x, but a plurality of them are intermittently provided in the longitudinal direction x. Here, one internal space SP20 is formed between a pair of non-connected parts 21 arranged in the longitudinal direction x. Also in this case, the same effect as in the case of the above-mentioned embodiment can be obtained. In this case, in the portion where the internal space SP20 is to be formed in the connecting portion 20, air is intermittently discharged from the tip of the needle 52 (see FIG. 4). Thereby, a plurality of internal spaces SP20 are formed intermittently in the longitudinal direction x. (Example)

Hereinafter, using Table 1, examples and comparative examples of the intermittent splicing type optical fiber ribbon core wire 1 will be described. Table 1 shows the outlines of Examples and Comparative Examples. In addition, in order to facilitate understanding, in the description of the examples and comparative examples, the same as in the above-mentioned embodiment, the respective parts are denoted by reference numerals.

[1] Preparation of samples [1-1] Example 1 In Example 1, a sample of the intermittent splicing type optical fiber ribbon core wire 1 was produced under the following conditions. In Example 1, the maximum exposed width a of the optical fiber 10, the outer diameter D of the optical fiber 10, and the thickness of the connecting portion 20 at the center between two adjacent optical fibers 10 in the width direction y t is the value shown in Table 1.

In Example 1, a silica glass SM fiber (outer diameter 125μm) was used in which a primary coating composed of a urethane acrylate ultraviolet curable resin and a secondary coating composed of a urethane acrylate ultraviolet curable resin were sequentially formed. The optical fiber 10 is an optical fiber 10 with an outer diameter D of 165 μm.

In addition, a urethane acrylate ultraviolet curable resin with a Young's modulus of 1070 MPa at 23°C, a tensile strength (JISK7161: 2004) of 25 MPa, and an elongation (JISK7161: 2004) of 31% is used to form the connection Department 20.

[1-2] Other embodiments In other embodiments, except for the maximum exposed width a of the optical fiber 10, the outer diameter D of the optical fiber 10, and the thickness of the connecting portion 20 at the center between two adjacent optical fiber wires 10 in the width direction y Except for the case where t is the value shown in Table 1, a sample was produced in the same manner as in Example 1.

[1-3] Comparative example In the comparative example, a sample was produced in the same manner as in Example 1, except that the internal space SP20 was not formed in the connecting portion 20 and the conditions shown in Table 1.

[2] Test method As shown in Table 1, various tests were performed on the samples of each example prepared as described above.

[2-1] Resin removal performance In order to determine the resin removal performance, first, at room temperature, use a brush with a bristle hardness of 60N/cm ² or less specified in JISS3061:1995 to remove the optical fiber single core wire from the optical fiber ribbon core wire Single core separation. Then, a commercially available single-core separating tool is reciprocated on the surface of the single-core optical fiber after the single-core separation. Thus, the number of reciprocations required to remove the bonding material from the surface of the optical fiber single core wire is obtained. Here, the aforementioned test was performed 32 times (n=32) on samples of each example. In Table 1, the average value of the number of reciprocations is shown based on the five stages shown below. In addition, none of the five stages shown below has practical problems. •5: When the number of reciprocations is less than 4 times • 4: When the number of reciprocations is more than 4 times and less than 6 times • 3: When the number of reciprocations is more than 6 times and less than 8 times • 2: When the number of reciprocations is more than 8 times and When less than 10 times • 1: When the number of reciprocations is more than 10 times

[2-2] Band strength When determining the strength of the ribbon, first, the optical fiber cable including the intermittent splicing type optical fiber ribbon core wire 1 is cut into a length of 10 meters to prepare a sample optical fiber cable. Then, the sample optical cable was subjected to the "bending test under tension" specified in JISC6870-1-21:2018. Then, the intermittent splicing type optical fiber ribbon core wire 1 inside was taken out from the above-mentioned sample optical fiber cable. Next, the number of broken connection portions 20 in the intermittent splicing type optical fiber ribbon core wire 1 is determined. That is, the number of failures in the connecting portion 20 interposed between the pair of non-connecting portions 21 is determined. In Table 1, the number of broken connection parts 20 is shown based on the five stages shown below. In addition, none of the five stages shown below has practical problems. • 5: When the number of broken connection parts 20 is 0 • 4: When the number of broken connecting parts 20 is 1 • 3: When the number of broken connection parts 20 is 2 • 2: When the number of broken connection parts 20 is 3 (equivalent to the strength broken during operation) • 1: When the number of broken connection parts 20 is 4 or more

[2-3] Measurement of Polarization Mode Dispersion PMD In the measurement of PMD, a light polarization analyzer (N7788B manufactured by Agilent) and a variable wavelength laser light source (81600B manufactured by Agilent) were used. In Table 1, the measured values of PMD are shown on the basis of the four stages shown below. • 4: PMD is 0.05ps/km ^1/2 or less • 3: PMD is greater than 0.05ps/km ^1/2 and 0.1ps/km ^1/2 or less • 2: PMD is greater than 0.1ps/km ^{1 /2} and 0.18ps/km ^1/2 or less • 1: PMD is greater than 0.18ps/km ^1/2

[3] Test results From the above results, it can be seen that when the above conditional expression (1) and conditional expression (2) are satisfied (Examples 2, 3, 6, 7, 11, 12, and 13), the resin removability is excellent, and due to the tape strength If it is sufficient, the tape has excellent partitioning properties, can reduce the stress applied to the optical fiber, and can reduce polarization mode dispersion (PMD).

1: Intermittent spliced fiber ribbon core wire 10: Optical fiber 10a: Optical fiber 10b: Optical fiber 10c: Optical fiber 10d: Optical fiber 11: Optical fiber 12: Coated film 20: Connection 21: Non-connected part 50: Manufacturing device 51: Mould 52: Needle 53: Rotary Knife 54: Ultraviolet radiation device 121: first protective layer 122: second protective layer 123: colored layer 201: Overall coating SP20: Internal space

[Fig. 1] Fig. 1 is a schematic diagram of the main part of the structure of the intermittent splicing type optical fiber ribbon core wire 1 of the embodiment. [Fig. 2] Fig. 2 is a schematic diagram of the main part of the structure of the intermittent splicing type optical fiber ribbon core wire 1 of the embodiment. Fig. 3 is an enlarged cross-sectional view of the intermittent splicing type optical fiber ribbon core wire 1 of the embodiment. [Fig. 4] Fig. 4 is a schematic diagram of a main part of an intermittent splicing type optical fiber ribbon core wire 1 manufacturing apparatus 50 according to the embodiment. [Fig. 5] Fig. 5 is a schematic diagram of a main part of an intermittent splicing type optical fiber ribbon core wire 1 manufacturing apparatus 50 according to the embodiment. [Fig. 6] Fig. 6 is a diagram showing an intermittent splicing type optical fiber ribbon core wire 1 of Modification 1 of the embodiment. [Fig. 7] Fig. 7 is a diagram showing an intermittent splicing type optical fiber ribbon core wire 1 of Modification 2 of the embodiment. [Fig. 8] Fig. 8 is a diagram showing an intermittent splicing type optical fiber ribbon core wire 1 of Modification 3 of the embodiment. [Fig. 9] Fig. 9 is a diagram showing an intermittent splicing type optical fiber ribbon core wire 1 of Modification 4 of the embodiment. [Fig. 10] Fig. 10 is a diagram showing an intermittent splicing type optical fiber ribbon core wire 1 of Modification 5 of the embodiment. [Fig. 11] is a diagram showing an intermittent splicing type optical fiber ribbon core wire 1 according to Modification 6 of the embodiment.

1: Intermittent spliced fiber ribbon core wire

10: Optical fiber

10a: Optical fiber

10b: Optical fiber

10c: Optical fiber

10d: Optical fiber

11: Optical fiber

12: Coated film

20: Connection

21: Non-connected part

121: first protective layer

122: second protective layer

123: colored layer

201: Overall coating

SP20: Internal space

Claims (5)

An intermittent spliced optical fiber ribbon core wire, which has: The optical fiber line extends in the longitudinal direction and is arranged in a plurality of lines in the width direction orthogonal to the longitudinal direction; and The connecting portion connects the optical fibers adjacent to each other in the width direction among the plurality of optical fibers, and The connecting portion is intermittently provided in the length direction and the width direction, The aforementioned connecting portion forms an internal space inside. The intermittent splicing type optical fiber ribbon core wire according to claim 1, wherein: The aforementioned optical fiber includes a portion exposed to the aforementioned internal space. The intermittent spliced optical fiber ribbon core wire of claim 2, wherein the maximum exposure width a of the optical fiber wire, the outer diameter D of the optical fiber wire, and the distance between the optical fiber wires adjacent in the width direction The thickness t of the aforementioned connecting portion at the center satisfies the following conditional expression (1) and conditional expression (2),

. The intermittent splicing type optical fiber ribbon core wire according to any one of claims 1 to 3, wherein: The internal space is continuously provided toward the longitudinal direction of the optical fiber. The intermittent splicing type optical fiber ribbon core wire according to any one of claims 1 to 4, wherein: The plurality of optical fibers are provided with an overall resin coating film, The connecting portion is formed by the overall coating film.

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