• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    FIBER OPTIC TAPE AND FIBER OPTIC CABLE ACCOMMODATING FIBER OPTIC TAPE A fiber optic tape capable of obtaining a higher density and a reduction in diameter and an accurate positioning of optical fibers in V-shaped grooves is provided. fusion machine, without failure. The fiber optic strip 1 includes three or more of optical fibers 2 arranged in parallel and connection portions 3, each connecting two adjacent optical fibers 2 together, the connection portions 3 being provided intermittently in each direction tape length and a tape width direction. The optical fiber strip 1 has an outer diameter dimension of the optical fibers 2, which is regulated to less than or equal to 220 (Mi) m, and has a distance between the centers of two adjacent optical fibers which is regulated to 250 (more or less) 30 (Mi) m.
    公开号:BR112014009570B1
    申请号:R112014009570-1
    申请日:2012-10-15
    公开日:2020-12-01
    发明作者:Akira NAMAZUE；Ken Osato；Naoki Okada；Yusuke Yamada；Daisuke KAKUTA；Hisaaki NAKANE；Shinya HAMAGUCHI
    申请人:Fujikura Ltd.；Nippon Telegraph And Telephone Corporation；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [0001] The present invention relates to a fiber optic tape having an intermittent fixing structure in which adjacent optical fibers are intermittently connected together through connection portions, and refers to a fiber optic cable housing the tape optical fiber. BACKGROUND TECHNIQUE
    [0002] There is an increased demand for higher density and reduced diameter in the technical field of fiber optic cables. As an example of a method for obtaining a higher density and a reduction in diameter, a method for reducing the outer diameter of optical fibers by 250 pm is proposed, which is a size currently used, to 200 pm or less (for example, example, as described in Patent Literature 1). A fiber optic tape using this method has a structure in which a plurality of optical fibers, each having an outer diameter of 200 pm or less, is arranged in parallel, and the entire circumference of the optical fibers is covered with an ultraviolet curable resin. .
    [0003] With the fiber optic tape described in Patent Literature 1, however, an intermediate branching operation is difficult when depositing optical fibers in subscriber homes. In order to deposit optical fibers in subscriber homes, it is required that a covering layer entirely covered with ultraviolet curable resin be removed in the middle of the cable, so that particular optical fibers are only extracted from the plurality of fibers optics. Since the entire circumference of the plural optical fibers is covered with the ultraviolet curable resin, removal of the ultraviolet curable resin is difficult and the optical fibers in particular are not easily removed from the other optical fibers. In addition, in the fiber optic tape described in Patent Literature 1, the fully covered covering layer increases the thickness of the optical fiber tape by the thickness of the covering layer, which decreases its packing density.
    [0004] Patent Literature 2 teaches a fiber optic tape capable of solving these problems. This fiber optic tape does not have a structure in which the optical fibers are entirely covered with resin, but has an intermittent fixation structure in which two fibers adjacent optics of three or more optical fibers arranged in parallel are connected together with resin. The intermittent fastening structure of the fiber optic tape described in Patent Literature 2 contributes to an easy intermediate branching operation and has the advantage of a higher density, since the number of connection portions is less than in the structure of the Patent Literature 1. CITATION LIST PATENT LITERATURE
    [0005] Patent Literature 1: Japanese Patent No. 3058203
    [0006] Patent Literature 2: Japanese Patent No. 4143651 SUMMARY OF THE INVENTION
    [0007] However, when the fiber optic tape described in Patent Literature 1 is fused and connected to another fiber optic tape, the bare optical fibers (glass optical fibers), from which a covering layer made of resin is removed, they can be difficult to place in a melting machine having plural V-shaped grooves and a predetermined pitch to be placed independently in the V-shaped grooves. A failure in the positioning of the optical fibers in the V-shaped grooves in the fusion machine requires extra work to forcibly position the optical fibers in the V-shaped grooves.
    [0008] An objective of the present invention is to provide a fiber optic strip capable of obtaining a higher density and a reduction in diameter and to accurately position optical fibers in V-shaped grooves in a fusion machine, without failure, and provide a fiber optic cable housing the fiber optic tape.
    [0009] Claim 1 recites a fiber optic tape comprising three or more optical fibers arranged in parallel and connection portions connecting two adjacent optical fibers together, the connection portions intermittently provided in each of a longitudinal tape direction and a tape width direction, in which an outer diameter dimension of the optical fibers is regulated to be less than or equal to 220 pm, and a distance between centers of the two adjacent optical fibers is regulated to 250 pm, with a margin about 30 pm.
    [0010] Claim 2 recites the optical fiber tape according to claim 1, wherein each of the connecting portions is formed in such a way that it fills resin in a space between two adjacent optical fibers, and both surfaces of the respective connecting portions are each formed in a curved recess towards a center of space for separation of lines each connecting points of contact of the optical fibers, when being placed on a horizontal surface.
    [0011] Claim 3 recites the optical fiber tape according to claim 1, wherein each of the connection portions is formed in such a way that it fills resin in a space between two adjacent optical fibers and covers a periphery of the respective fibers optics with the resin, and a resin thickness of the periphery covered with the resin is set to be less than or equal to 15 pm.
    [0012] Claim 4 recites the optical fiber tape according to any one of claims 1 to 3, wherein an outermost layer of the respective optical fibers is colored.
    [0013] Claim 5 recites a fiber optic cable that houses the fiber optic tape according to any one of claims 1 to 4 there.
    [0014] According to the present invention, a reduction in diameter of the optical fibers is obtained and the optical fiber tape is easily flexed due to its intermittent fixation structure, in which the connection portions for connection of two adjacent optical fibers they are provided intermittently in each of the longitudinal tape direction and the tape width direction and due to the reduced external diameter dimension of the optical fibers, which is set to less than or equal to 220 pm. As a result, a greater number of fiber optic tapes can be housed in the cable, in order to improve the packing density.
    [0015] According to the present invention, the distance between the centers of two adjacent optical fibers is set to 250 + 30 pm, which is equal to the distance between the centers of two adjacent optical fibers of a commonly distributed fiber optic tape , so that the respective optical fibers are accurately positioned in the corresponding V-shaped grooves in the fusion machine, without falling out of the V-shaped grooves. BRIEF DESCRIPTION OF DRAWINGS
    [0016] Figure 1 is a top perspective view showing an example of a fiber optic tape having an intermittent fixation structure in accordance with the present embodiment.
    [0017] Figure 2 is an enlarged cross-sectional view of a connecting portion of the fiber optic tape of Figure 1. Figure 2 (A) is a structural example of the connecting portion, and Figure 2 (B) is another structural example of the connecting portion.
    [0018] Figure 3 is an enlarged cross-sectional view of a connection portion of the fiber optic tape having another structure of Figure 1. Figure 3 (A) is a structural example of the connection portion, and Figure 3 (B) is another example of the connection portion structure.
    [0019] Figure 4 is a view showing a state in which glass optical fibers in the fiber optic tape according to the present modality from which a cover is removed are placed in V-shaped grooves of a screening machine. Fusion.
    [0020] Figure 5 is a cross-sectional view of a central tube type fiber optic cable housing the fiber optic tape according to the present modality there.
    [0021] Figure 6 is a cross-sectional view of an SZ slit fiber optic cable housing the fiber optic tape according to the present modality there.
    [0022] Figure 7 is a cross-sectional view of a C-slot type fiber optic cable housing the fiber optic tape according to the present modality there. DESCRIPTION OF MODALITIES
    [0023] From this point on, a specific embodiment of the present invention will be explained in detail with reference to the drawings.
    [0024] Figure 1 shows an example of a fiber optic strip having an intermittent fixing structure according to the present embodiment, and figure 2 shows an enlarged cross section of a connection portion of the fiber optic strip of figure 1 As shown in figure 1, the optical fiber strip 1 according to the present embodiment has a structure in which three or more optical fibers 2 are arranged in parallel, the two adjacent optical fibers 2 are connected together via connection portions 3 , and the connecting portions 3 are located intermittently in each of a longitudinal tape direction (in the direction of arrow X in figure 1) and a tape width direction (in the direction of arrow Y in figure 1).
    [0025] As shown in figure 1, optical fiber tape 1 is made up of n optical fibers 2 in total, and the two adjacent optical fibers 2 of the n optical fibers 2 are intermittently connected together through connection portions 3 in each of the longitudinal tape direction and the tape width direction. The connection portions 3 connecting the two adjacent optical fibers 2 together are formed in the longitudinal direction of tape in a fixed step P1, and have a shorter length than unconnected portions, each located between them. Specifically, the length of each connecting portion 3 is shorter than that of each unconnected portion in the longitudinal tape direction.
    [0026] Also, only a connection portion 3 is formed in the direction of tape width for connection of the two adjacent optical fibers 2. Optical fiber 2 is not located on the same line in the ribbon width direction as the other connecting portion 3 connecting two other adjacent optical fibers 2, but located in the offset position of the other connecting portion 3 in the longitudinal ribbon direction. Therefore, the connection portions 3 formed on the fiber optic strip 1 are arranged in a zigzag manner as a whole. Note that the arrangement of connection portions 3 is not limited to that shown in figure 1, they can be in other configurations. The arrangement shown in figure 1 is merely an example. Here, in addition to the arrangement in which only a connection portion 3 is provided in the tape width direction, two or more connection portions 3 can be formed in the ribbon width direction in such a way that at least one unconnected portion is located between connection portions 3.
    [0027] As shown in figure 2 (A), the connecting portion 3 connects the two adjacent optical fibers 2 together, in such a way that the space between the two adjacent connecting portions 3 is filled with resin (for example, a curable resin with ultraviolet) and then cure it. Both surfaces 3a and 3b of the connecting portion 3 are respectively positioned on the same lines as lines 4 and 5, each connecting the contact points of the respective optical fibers 2, when being placed on the horizontal surface. Therefore, the inner half circumferences of the optical fibers 2 facing the space S are covered with the resin making up the connection portion 3, but the outer half circles on the opposite side of the space S are not covered with the resin.
    [0028] The two surfaces 3a and 3b of the connecting portion 3 shown in figure 2 (B) are each formed in a recess that has a concave shape curved towards the center of the space S to separate the lines 4 and 5 , each connecting the contact points of the respective optical fibers 2, when placed on the horizontal surface. In figure 2 (B), the amount of resin composing the connection portion 3 is less than that in figure 2 (A), and the resin is locally concentrated in the central portion of the space S between the two optical fibers 2. The tape fiber optics connected to connection portions 3 having a configuration like this is more easily flexed, since the amount of resin used is less than that of connection portion 3 shown in figure 2 (A), so that the number of the fiber optic tapes to be housed in a cable increases further.
    [0029] Each of the optical fibers 2 includes a bare glass optical fiber 6 provided in the center thereof, a first cover layer 7 covering the periphery of the glass optical fiber 6, and a second cover layer 8 still covering the periphery of the first covering layer 7. The glass fiber 6 has a diameter of 125 pm. The first cover layer 7 is a relatively soft resin layer for absorbing side pressure applied to the glass. The second covering layer 8 is a relatively hard resin layer to protect against external damage. The second cover layer 8 can be additionally covered with a colored layer, so that the respective optical fibers 2 can be broken down between them. The colored layer is formed as an outer layer in order to easily differentiate the respective optical fibers 2 visually.
    [0030] According to the present modality, the outer diameter dimension of the optical fibers 2 (the entire diameter including the outermost layer) H is regulated to be less than or equal to 220 pm, and the distance L between the centers of the two adjacent optical fibers 2 is set to 250 + 30 pm. The optical fiber 2 of the present modality is smaller in diameter than the conventionally used optical fiber 2, which has an external diameter of 250 pm. In addition, the distance L between the centers of the two adjacent optical fibers in the conventionally used optical fiber tape is 250 pm. The present modality regulates the distance L to 250 pm with a margin of more or less 30 pm.
    [0031] The connecting portion 3 shown in figure 2 (A) has a thickness which is the same as the outer diameter dimension H of the optical fibers 2. The connecting portion 3 shown in figure 2 (B) has a thickness which is smaller than the outer diameter dimension H of the optical fibers 2.
    [0032] Fiber optic tape 1 has an intermittent fixing structure in which connection portions 3 are provided intermittently in each of the longitudinal tape direction and the tape width direction for connecting the two optical fibers 2 together, and has a configuration in which the optical fibers 2 have an external diameter dimension H less than or equal to 220 pm, which is smaller than that of the conventionally used optical fibers, which contributes to the reduction of the diameter optical fibers 2 and you can easily flex the ribbon. As a result, a greater number of fiber optic tapes 1 can be housed in a cable, compared to fiber optic tapes having a conventional structure, in order to increase their packing density.
    [0033] Also, since the optical fiber tape according to the present modality has a configuration in which the optical fibers 2 have an external diameter dimension H less than or equal to 220 pm, which is less than that of conventionally used optical fibers, the volume of optical fibers can be reduced by 20% or more, compared to optical fibers having a conventional configuration. Therefore, the entire diameter of the fiber optic tape can be reduced, in order to further increase its packing density.
    [0034] It should be noted that connection portions 3 are not limited to the configurations shown in figure 2 (A) and figure 2 (B), where connection portions 3 are formed only in the space S between the two optical fibers 2 adjacent, but can have the configurations shown in figure 3 (A) and figure 3 (B). The connection portions 3 shown in figure 3 are formed so as to fill resin in the space S between the two optical fibers 2 and to cover the peripheries of the optical fibers 2 with resin. The thickness of resin T on the outer half circumference of each optical fiber 2 covered with the connection portion 3 is set to less than or equal to 15 pm.
    [0035] The example shown in figure 3, in which the half external circumference of each optical fiber 2 having the outside diameter dimension of 220 pm is covered with resin, has no influence on the flexural performance of the optical fiber tape 1, since the resin thickness T of the resin covering the outer half circumference is as thin as 15 pm or less. Therefore, such a configuration does not prevent the improvement of the packing density in the cable. [Example]
    [0036] Various types of optical fibers having different external diameter dimensions were used, in which the distance between the adjacent optical fiber centers varied, in order to manufacture optical fiber tapes (4-core tapes). The manufacture of connecting portions and unconnected portions employed the method set out in Unexamined Japanese Patent Application Publication No. 2010-033010 (Japanese Patent Application No. 2009-082778). The pitch adjustment between the optical fibers employed in the method set out in Unexamined Japanese Patent Application Publication No. 08-146236 (Japanese Patent Application No. 06-163292). Note that all optical fibers on a fiber optic tape have the same outside diameter dimension.
    [0037] Next, a batch fusion slicing performance was evaluated, when an optical fiber tape thus obtained was entirely fused with the other optical fiber tape. The operation process was as follows. First, the fiber optic tape was maintained with a support, the first layers of cover 7 and the second layers of cover 8 covering the respective optical fibers were removed by using the Hot Jacket Stripper to obtain the naked glass fiber optics 6, and side surfaces of the bare glass optical fibers 6 thus obtained were cut with a fiber cutter. Subsequently, the respective glass optical fibers 6 in the optical fiber tape maintained with the support were placed in a fusion machine 10 having V-shaped grooves 9 formed in a fixed step P2 shown in figure 4. In this state, the evaluation was carried out in such a way as to determine whether the respective glass optical fibers 6 have been placed in the corresponding V-shaped grooves 9. The case in which the glass optical fibers 6 were placed in the V 9 shaped grooves was defined as OK, and the case in which the glass optical fibers 6 deviated from the V 9 shaped grooves was defined as NG.
    [0038] The Hot Jacket Stripper used was the HJS manufactured by Fujika Ltd. The fiber cutter used was CT-30 manufactured by Fujika Ltd. The fusion machine used was the FSM-60R also manufactured by Fujika Ltd. Step P2 between the respective V 9 slots in the melting machine 10 is 250 pm. The operation under the conditions described above was repeated 10 times and the NG number was then counted. Table 1 shows their evaluation.

    [0039] The results shown in Table 1 revealed that, when the distance L between the centers of the optical fibers 2 adjacent to the optical fiber strip 1 having an intermittent fixation structure is set to 250 + 30 pm (220 pm to 280 pm) , the glass optical fibers 6 do not deviate from the V-shaped grooves 9, so as to be fused concurrently with the corresponding glass optical fibers of the other optical fiber strip. The number of NGs increased when the fiber optic tape did not meet the condition described above, and the glass fiber optics 6 might not be put into the V 9-shaped grooves precisely. [Fiber Optic Cable]
    [0040] Figure 5 shows an example of a fiber optic cable of the central tube type housing the fiber optic tape according to the present modality there. The center tube type 11 optical fiber cable has a configuration in which the optical fiber ribbon 1 of the present embodiment is formed in a cable core 12 in such a way that the optical fibers 2 are wound in the ribbon width direction and assembled in a bundle, as indicated by a dash line and double point in figure 5, a thermoplastic resin is extruded over the periphery of the cable core 12 thus obtained, in order to form a tube 13 in it, and the tube 13 it is additionally covered with polyolefin so as to form a sheath 14 therein.
    [0041] Figure 6 shows an example of an optical fiber cable with SZ slit housing the optical fiber ribbon according to the present modality there. The slotted fiber optic cable SZ 15 has a configuration in which a plurality of slots 18 having a U shape in the t is formed on the outer periphery of a slotted core 17 including a traction member 16 in the center thereof extending in the longitudinal tape direction, the fiber optic tape 1 kinetic motion apparatus is wound in the tape width direction in a bundle and housed in each of the slits 18, the peripheral surface of the slotted core 17 including the slit openings 18 covered with a winding tape with pressure 19 and a sheath 20 is a clip information file formed there by extrusion.
    [0042] Figure 7 shows an example of a fiber-optic cable with a C-slot housing the fiber-optic tape according to the present modality there. The C 21 slotted fiber optic cable has a configuration in which the fiber optic ribbon 1 according to the present embodiment is wound in the direction of ribbon width in a bundle and housed in a slot groove 24 of a core with slot 23 having a C shape in the cross section including tensile members 22 there, and the entire slot core is covered with a sheath 26 through a pressure tape 25 interposed between them.
    [0043] Although the fiber optic tape 1 shown in each of figure 5, figure 6 and figure 7, according to the present modality, is wound in the direction of tape width in a bundle and housed in the table, the fiber optic tape 1 according to the present embodiment can be folded in layers in the vertical direction and housed in the cable. Alternatively, a plurality of fiber optic tapes 1 can be stacked on top of one another to have a stacked structure and then housed in the cable.
    [0044] The fiber optic cables 11, 15 and 21 according to the present modality each use optical fibers 2 having the reduced dimension of external diameter less than or equal to 22 0 pm. Therefore, a greater number of optical fibers 2 can be housed in the cable, compared to the conventionally used optical fibers 2 having an external diameter dimension of 250 pm, in order to guarantee a higher density. In addition, the fiber optic cables 11, 15 and 21 according to the present modality can accommodate the fiber optic tape 1 having an intermittent fixation structure in any state, in such a way that the fiber optic tape 1 is flexed and wrapped in a cylindrical shape or folded to be stacked in any direction.
    [0045] In addition, fiber optic cables 11, 15 and 21 according to the present modality can easily separate the respective optical fibers 2 from each other, in order to improve a single core separation workability at the time of terminal taking to extract the optical fibers 2 from the cable terminals or at the time of connection operation to connect a connector to the extracted optical fibers 2, since the optical fiber cables 11, 15 and 21 each use the ribbon fiber optic 1 including connection portions 3 formed intermittently in each of the longitudinal tape direction and the tape width direction, for connecting two adjacent optical fibers 2 together. INDUSTRIAL APPLICABILITY
    [0046] The present invention is applicable to a fiber optic tape that has an intermittent fixing structure for the intermittent connection of the adjacent optical fibers together through the connection portions.
    权利要求:
    Claims (4)
    [0001]
    1. Fiber optic tape comprising: three or more optical fibers arranged in parallel; and connection portions connecting two adjacent optical fibers together, the connection portions being provided intermittently in each of a longitudinal tape direction and in a tape width direction, in which a gap is formed between two adjacent optical fibers , each of the connecting portions is formed in such a way that it fills resin in the gap so as to separate the two adjacent optical fibers from each other through the connecting portion and in such a way that each of the connecting portions has opposite side surfaces, each in contact with a corresponding of the two adjacent optical fibers and having a concave shape conforming to an outer circumferential surface of the corresponding of the two adjacent optical fibers, each of the connecting portions includes an upper surface and a lower surface in relation to a height direction of the tape, each extending from one of the two adjacent optical fibers to the other of the two fibers adjacent optics and each having a concave shape recessed in the direction of the tape height, the direction of the tape height being perpendicular to both the direction of the tape width and the longitudinal direction of the tape, and in which the connecting portions are formed , each one, in order to cover a periphery of the respective two adjacent optical fibers, with the resin extending from the gap, the tape being characterized by the fact that an external diameter dimension of the optical fibers is regulated to be less than or equal to 220 pm, and a distance between centers of the two adjacent optical fibers is set to 250 pm with a margin of plus or minus 30 pm.
    [0002]
    2. Fiber optic tape, according to claim 1, characterized by the fact that a thickness of the periphery resin covered with the resin is regulated to be less than or equal to 15 pm.
    [0003]
    Optical fiber tape according to any one of claims 1 to 2, characterized in that the outermost layer of the respective optical fibers is colored.
    [0004]
    4. Fiber optic cable, characterized by the fact that it houses the fiber optic tape as defined in any one of claims 1 to 3.
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    同族专利:
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    CN103890628A|2014-06-25|
    TW201331659A|2013-08-01|
    PL2770357T3|2021-09-06|
    RU2589445C2|2016-07-10|
    CA2851090A1|2013-04-25|
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    US20160161692A1|2016-06-09|
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    EP2770357B1|2021-01-20|
    EP2770357A4|2015-06-24|
    ES2849749T3|2021-08-20|
    TWI540355B|2016-07-01|
    US20200218020A1|2020-07-09|
    AU2012327115B2|2014-09-18|
    EP3176620B1|2021-09-29|
    AU2012327115A1|2014-04-24|
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    US20170184803A1|2017-06-29|
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    CN106873101A|2017-06-20|
    RU2014119931A|2015-11-27|
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    EP2770357A1|2014-08-27|
    KR20140079824A|2014-06-27|
    NZ623457A|2015-03-27|
    CN103890628B|2017-11-24|
    PT3176620T|2021-11-19|
    PT2770357T|2021-03-04|
    ES2897006T3|2022-02-28|
    EP3176620A1|2017-06-07|
    JP5564026B2|2014-07-30|
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    法律状态:
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-10-15| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-04-07| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-08-04| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-01| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 15/10/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2011-229066|2011-10-18|
    JP2011229066A|JP5564026B2|2011-10-18|2011-10-18|Optical fiber tape core and optical fiber cable storing the optical fiber core|
    PCT/JP2012/076590|WO2013058206A1|2011-10-18|2012-10-15|Optical fiber tape core wire and optical fiber cable housing optical fiber tape core wire|
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