WO2019004147A1 - Optical fiber cable - Google Patents

Optical fiber cable Download PDF

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Publication number
WO2019004147A1
WO2019004147A1 PCT/JP2018/024056 JP2018024056W WO2019004147A1 WO 2019004147 A1 WO2019004147 A1 WO 2019004147A1 JP 2018024056 W JP2018024056 W JP 2018024056W WO 2019004147 A1 WO2019004147 A1 WO 2019004147A1
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Prior art keywords
cable
optical fiber
core
tension member
tape
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PCT/JP2018/024056
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French (fr)
Japanese (ja)
Inventor
江川　晋爾
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住友電気工業株式会社
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Publication of WO2019004147A1 publication Critical patent/WO2019004147A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables

Definitions

  • the present invention relates to optical fiber cables.
  • Patent Document 1 discloses a structure of a slotless type optical fiber cable in which a tension member is embedded in a cable sheath (also referred to as a sheath) and a notch for tearing the cable sheath is provided.
  • the slotless type optical fiber cable has an advantage of being easily densified because there is no slot like a slot type optical fiber cable.
  • the optical fiber cable according to the present disclosure comprises an optical unit comprising a plurality of optical fiber cores or a tape core line in which the optical fiber cores are arranged, a cable core in which the optical unit is housed, and It is a slotless type optical fiber cable provided with the provided cable jacket, wherein the optical unit is composed of a plurality of subunits in which the optical fiber core wire or the tape core wire is twisted together.
  • a tensioning member is provided only in the sub unit, and no tensioning member is provided in the cable sheath.
  • FIG. 1 is a view showing an example of an optical fiber cable according to a first embodiment of the present invention.
  • FIG. 2A is a view showing an example of the structure of an intermittent tape core, showing a state in which the intermittent tape core is opened in the arrangement direction.
  • FIG. 2B is a cross-sectional view taken along line BB in FIG. 2A.
  • FIG. 3 is a view showing an example of an optical fiber cable according to a second embodiment of the present invention.
  • An optical fiber cable comprises: (1) an optical unit comprising a plurality of optical fiber cores or a tape core formed by arranging the optical fibers; a cable core in which the optical unit is accommodated; A slotless type optical fiber cable comprising a cable jacket provided around the cable core, wherein the optical unit comprises a plurality of the optical fiber cores or a plurality of the tape cores twisted together. It comprises a sub unit, and a tension member is provided only in the sub unit, and the tension member is not provided other than the sub unit in the cable jacket. Due to the slotless structure, high density mounting is possible compared to conventional slotted optical fiber cables.
  • the tension members are not provided in the cable jacket but are provided dispersed only in the individual sub-units in the cable core, there is no directivity of bending and it is possible to obtain a conventional slotless type optical fiber cable In comparison, it is possible to provide an optical fiber cable that can be easily installed in a conduit. Furthermore, since the tension member is not embedded in the cable jacket as in the conventional slotless optical fiber, the thickness of the cable jacket can be reduced by that amount, and the diameter of the cable can be reduced. .
  • the tension member is disposed at the center position of the sub unit. Such a structure is easy to manufacture because the optical fibers or the tape may be twisted around the tension member. (3) The subunits are twisted together to form the optical unit, and the subunits provided with the tension members are disposed near the center position of the optical unit, and the tension members are not provided around the subunits. Sub unit is arranged. Also in this case, since the tension members are concentratedly arranged near the center of the optical unit, ie, the cable core, it is possible to provide an optical fiber cable which has no directivity of bending and which can be easily installed in a pipeline. Also, the flexibility of the optical fiber cable can be improved as compared to the case where tension members are provided in all the subunits.
  • FIG. 1 is a view showing an example of an optical fiber cable according to a first embodiment of the present invention
  • FIGS. 2A and 2B are views showing an example of the structure of an intermittent tape core.
  • the optical fiber cable 10 shown in FIG. 1 is a slotless type optical fiber cable, and has, for example, a round cable core 11 and a cable jacket 12 formed around the cable core 11.
  • the cable core 11 accommodates a plurality of subunits in which, for example, a plurality of 12 intermittent tape filaments 20 are twisted.
  • Intermittent tape cores are formed by arranging a plurality of optical fiber cores in a parallel line and intermittently connecting a part or all of the adjacent optical fiber cores by a connecting part and a non-connecting part. It is. 2A shows a state in which the intermittent tape core is opened in the arrangement direction, and FIG. 2B shows a cross-sectional view taken along the line B-B in FIG. 2A. The line is configured to be intermittently connected every two cores.
  • a tape coating 24 made of an ultraviolet curable resin or the like is provided around each of the optical fiber cores 21.
  • core wires obtained by integrating two cores are connected by connecting portions 22 and non-connecting portions 23. It is connected intermittently.
  • the tape coating 24 is connected in the connecting portion 22, and the adjacent tape coverings 24 are separated without being connected in the non-connecting portion 23.
  • the intermittent tape core wire may not be provided with a connection part and a non-connection part every two cores, for example, may be intermittently connected with a connection part and a non-connection part every one core.
  • the optical fiber core 21 accommodated in the intermittent tape core is, for example, a glass fiber with a standard outer diameter of 125 ⁇ m and a coating with a coating outer diameter of about 250 ⁇ m.
  • the colored coating is applied, it is not limited thereto, and the outer diameter of the coating may be in the range of 135 ⁇ m to 220 ⁇ m, for example, a small diameter fiber of about 165 ⁇ m or 200 ⁇ m. The use of small diameter fibers makes high density mounting easier.
  • the subunit 33 shown in FIG. 1 is formed, for example, by collecting a plurality of 12 intermittent tape cores 20, spirally twisting them, and bundling them with a bundle material 34 for identification.
  • the cable core 11 accommodates the optical unit 30 formed by collecting a plurality of subunits 33 and twisting them in a spiral, for example.
  • the twisting of the intermittent tape core 20 and the subunits 33 may be SZ-like, which is periodically reversed, in addition to spiral in one direction.
  • the intermittent tape cable 20 is more flexible than a general tape cable, if the optical unit 30 is configured of the intermittent tape cable, it is difficult for side pressure to be applied to the optical fiber cable, and thus the optical fiber The occupancy rate of the core wire 21 can be increased.
  • the cable core 11 also accommodates a tension member 31 in the sub unit 33.
  • the tension members 31 shown in FIG. 1 are disposed, for example, at central positions of the subunits 33 one by one along the longitudinal direction of the subunits 33.
  • the sub-unit 33 of the present embodiment is formed by twisting the intermittent tape core wire 20 around the tension member 31. Therefore, a bundle material for preventing the intermittent tape core wire 20 from being separated may be omitted.
  • a steel wire or a non-metallic material for example, a glass fiber reinforced plastic (GFRP) formed of glass fiber or a twisted yarn is used as a wire having a resistance against tension and compression.
  • GFRP glass fiber reinforced plastic
  • the tension member 31 is formed of GFRP or a twisted yarn, weight reduction of the cable can be achieved as compared with the case where a metal tension member is provided.
  • the water absorption powder may be applied to the tension member 31 in order to stop water in the cable core 11.
  • the cable core 11 is put together in a round shape by vertically pressing or laterally winding the optical unit 30 with a winding tape 32.
  • the holding and winding tape 32 is, for example, a non-woven fabric containing polyethylene terephthalate (PET) or the like, and is wound from the outside of the light unit 30.
  • PET polyethylene terephthalate
  • the press-winding tape may be omitted, but if the press-winding tape is provided, the cable core can be easily rounded.
  • the outer side of the holding and winding tape 32 is covered with a cable jacket 12 made of, for example, PE (polyethylene), PVC (polyvinyl chloride) or the like.
  • a cable jacket 12 made of, for example, PE (polyethylene), PVC (polyvinyl chloride) or the like.
  • the water absorbent powder may be applied to the holding and winding tape 32.
  • a tear-off string for tearing the cable jacket 12 in the longitudinal direction of the cable may be embedded at the time of extrusion molding of the cable jacket 12.
  • the optical fiber cable according to the first embodiment since it has a slotless type structure, high density mounting is possible.
  • the tension members 31 are not provided in the cable sheath but are dispersedly provided only in the individual sub-units 33 in the cable core, there is no directivity of bending and the conventional slotless type optical fiber It is possible to provide an optical fiber cable that can be easily installed in a conduit compared to a cable. Further, since the tension member 31 is provided in the sub unit 33 and the tension member is not embedded in the cable jacket as in the conventional slotless type optical fiber, the thickness of the cable jacket is increased by that amount. This can be eliminated, and the diameter of the cable can be reduced.
  • the intermittent tape core wire 20 may be twisted and disposed around the tension member 31, such a structure is easy to manufacture.
  • FIG. 3 is a view showing an example of an optical fiber cable according to a second embodiment of the present invention.
  • the optical fiber cable 10A shown in FIG. 3 is also a slotless type optical fiber cable, and has, for example, a round cable core 11, and as in the example shown in FIG.
  • a plurality of subunits 33 in which a plurality of wires 20 are twisted together is collected, and an optical unit 30 formed by twisting the subunits 33 in a spiral shape is accommodated.
  • one tension member 31 is disposed at a central position of the subunit 33 along the longitudinal direction of the subunit 33, as shown in FIG. 3, the subunit 33 having the tension member 31 is provided. Is disposed only in the vicinity of the central position of the cable core 11, and a subunit 33 not provided with a tension member is disposed around it.
  • the optical fiber cable according to the second embodiment has a slotless structure as in the first embodiment and enables high-density mounting. Further, the sub-unit 33 provided with the tension member 31 is disposed only at the central position of the cable core 11. Also in this case, the tension members are concentratedly disposed near the center of the optical unit, ie, the cable core. It is possible to provide an optical fiber cable which is easy to install in a conduit without bending directionality. Furthermore, the flexibility of the optical fiber cable can be improved as compared to the case where the tension members 31 are provided in all the subunits 33.

Abstract

Provided is a slot-less optical fiber cable provided with: an optical unit comprising a plurality of optical fiber core wires or a tape core wire in which the optical fiber core wires are arranged side by side; a cable core in which the optical unit is accommodated; and a cable sheath that is provided so as to surround the cable core. The optical unit is configured from a plurality of sub-units in which a plurality of the optical fiber core wires or the tape core wires are twisted together, tension members are only provided inside the sub-units, and no tension members are provided other than in the sub-units inside the cable sheath.

Description

光ファイバケーブルFiber optic cable
　本発明は、光ファイバケーブルに関する。 The present invention relates to optical fiber cables.
　特許文献１には、テンションメンバをケーブル外被（シースともいう）に埋め込んでおき、ケーブル外被を引き裂くためのノッチを設けたスロットレス型の光ファイバケーブルの構造が開示されている。スロットレス型の光ファイバケーブルは、スロット型の光ファイバケーブルのようなスロットが無いため、高密度化しやすい、という利点がある。 Patent Document 1 discloses a structure of a slotless type optical fiber cable in which a tension member is embedded in a cable sheath (also referred to as a sheath) and a notch for tearing the cable sheath is provided. The slotless type optical fiber cable has an advantage of being easily densified because there is no slot like a slot type optical fiber cable.
特開２０１２－１６８３８０号公報JP, 2012-168380, A
　本開示の光ファイバケーブルは、複数本の光ファイバ心線または該光ファイバ心線を並べたテープ心線からなる光ユニットと、該光ユニットが収納されるケーブルコアと、該ケーブルコアの周囲に設けられたケーブル外被とを備えたスロットレス型の光ファイバケーブルであって、前記光ユニットは、前記光ファイバ心線または前記テープ心線を複数撚り合わせた複数のサブユニットで構成され、該サブユニット内にのみテンションメンバが設けられ、前記ケーブル外被内にはテンションメンバが設けられていない。 The optical fiber cable according to the present disclosure comprises an optical unit comprising a plurality of optical fiber cores or a tape core line in which the optical fiber cores are arranged, a cable core in which the optical unit is housed, and It is a slotless type optical fiber cable provided with the provided cable jacket, wherein the optical unit is composed of a plurality of subunits in which the optical fiber core wire or the tape core wire is twisted together. A tensioning member is provided only in the sub unit, and no tensioning member is provided in the cable sheath.
図１は、本発明の第１実施形態による光ファイバケーブルの一例を示す図である。FIG. 1 is a view showing an example of an optical fiber cable according to a first embodiment of the present invention.
図２Ａは、間欠テープ心線の構造の一例を示す図であり、間欠テープ心線を配列方向に開いた状態を示した図である。FIG. 2A is a view showing an example of the structure of an intermittent tape core, showing a state in which the intermittent tape core is opened in the arrangement direction.
図２Ｂは、図２ＡのＢ－Ｂ線矢視断面図である。FIG. 2B is a cross-sectional view taken along line BB in FIG. 2A.
図３は、本発明の第２実施形態による光ファイバケーブルの一例を示す図である。FIG. 3 is a view showing an example of an optical fiber cable according to a second embodiment of the present invention.
　［本開示が解決しようとする課題］
　上記特許文献１のようなスロットレス型の光ファイバケーブルの場合、テンションメンバがケーブル外被内の２箇所に配置されているため、光ファイバケーブルに曲げ方向性が生じ、ケーブルを布設しにくい、という問題がある。また、テンションメンバをケーブル外被内に設けると、このテンションメンバの分だけ、ケーブル外被の厚みが増すことになり、小径化が難しい。 [Problems to be solved by the present disclosure]
In the case of the slotless type optical fiber cable as described in Patent Document 1, since the tension members are disposed at two places in the cable jacket, bending directivity occurs in the optical fiber cable, making it difficult to lay the cable. There is a problem of Further, when the tension member is provided in the cable jacket, the thickness of the cable jacket is increased by the amount of the tension member, and it is difficult to reduce the diameter.
　そこで、従来のケーブルに比べ、布設しやすく且つ小径化を達成可能な、光ファイバケーブルを提供することを目的とする。 Therefore, it is an object of the present invention to provide an optical fiber cable which can be easily installed and which can achieve a reduction in diameter as compared with a conventional cable.
　［本開示の効果］
　本開示によれば、従来のケーブルに比べ、管路に布設しやすい光ファイバケーブルを提供することができる。さらに、ケーブルの小径化を図ることができる。 [Effect of the present disclosure]
According to the present disclosure, it is possible to provide an optical fiber cable that can be easily installed in a conduit compared to a conventional cable. Furthermore, the diameter of the cable can be reduced.
［本発明の実施形態の説明］
　最初に本発明の実施形態の内容を列記して説明する。
　本発明の一態様に係る光ファイバケーブルは、（１）複数本の光ファイバ心線または該光ファイバ心線を並べたテープ心線からなる光ユニットと、該光ユニットが収納されるケーブルコアと、該ケーブルコアの周囲に設けられたケーブル外被とを備えたスロットレス型の光ファイバケーブルであって、前記光ユニットは、前記光ファイバ心線または前記テープ心線を複数撚り合わせた複数のサブユニットで構成され、該サブユニット内にのみテンションメンバが設けられ、前記ケーブル外被内の前記サブユニット以外には前記テンションメンバが設けられていないものである。スロットレス型の構造であるため、従来のスロット型の光ファイバケーブルに比べて高密度実装が可能である。また、テンションメンバがケーブル外被内に無く、ケーブルコア内の個々のサブユニット内にのみ分散して設けられていることから、曲げの方向性が無く、従来のスロットレス型の光ファイバケーブルに比べ、管路に布設しやすい光ファイバケーブルを提供することができる。さらに、従来のスロットレス型の光ファイバのように、ケーブル外被にテンションメンバが埋め込まれていないため、その分、ケーブル外被の厚みを無くすことができ、ケーブルの小径化を図ることができる。 Description of the embodiment of the present invention
First, the contents of the embodiment of the present invention will be listed and described.
An optical fiber cable according to one aspect of the present invention comprises: (1) an optical unit comprising a plurality of optical fiber cores or a tape core formed by arranging the optical fibers; a cable core in which the optical unit is accommodated; A slotless type optical fiber cable comprising a cable jacket provided around the cable core, wherein the optical unit comprises a plurality of the optical fiber cores or a plurality of the tape cores twisted together. It comprises a sub unit, and a tension member is provided only in the sub unit, and the tension member is not provided other than the sub unit in the cable jacket. Due to the slotless structure, high density mounting is possible compared to conventional slotted optical fiber cables. In addition, since the tension members are not provided in the cable jacket but are provided dispersed only in the individual sub-units in the cable core, there is no directivity of bending and it is possible to obtain a conventional slotless type optical fiber cable In comparison, it is possible to provide an optical fiber cable that can be easily installed in a conduit. Furthermore, since the tension member is not embedded in the cable jacket as in the conventional slotless optical fiber, the thickness of the cable jacket can be reduced by that amount, and the diameter of the cable can be reduced. .
（２）前記テンションメンバが前記サブユニットの中央位置に配置されている。テンションメンバの周囲に光ファイバ心線またはテープ心線を撚り合わせて配置すればよいため、このような構造であれば、製造しやすい。
（３）前記サブユニットが撚り合わされて前記光ユニットを構成し、前記テンションメンバを設けた前記サブユニットが前記光ユニットの中央位置近傍に配置され、その周囲には、前記テンションメンバを設けていないサブユニットが配置されている。この場合にも、光ユニット、すなわちケーブルコアの中心付近にテンションメンバが集中して配置されるので、曲げの方向性が無く、管路に布設しやすい光ファイバケーブルを提供することができる。また、全てのサブユニットにテンションメンバを設けた場合に比べて、光ファイバケーブルの可撓性の向上を図ることも可能になる。 (2) The tension member is disposed at the center position of the sub unit. Such a structure is easy to manufacture because the optical fibers or the tape may be twisted around the tension member.
(3) The subunits are twisted together to form the optical unit, and the subunits provided with the tension members are disposed near the center position of the optical unit, and the tension members are not provided around the subunits. Sub unit is arranged. Also in this case, since the tension members are concentratedly arranged near the center of the optical unit, ie, the cable core, it is possible to provide an optical fiber cable which has no directivity of bending and which can be easily installed in a pipeline. Also, the flexibility of the optical fiber cable can be improved as compared to the case where tension members are provided in all the subunits.
［本発明の実施形態の詳細］
　以下、添付図面を参照しながら、本発明による光ファイバケーブルの好適な実施の形態について説明する。
　図１は、本発明の第１実施形態による光ファイバケーブルの一例を示す図であり、図２Ａ，２Ｂは、間欠テープ心線の構造の一例を示す図である。 Details of the Embodiment of the Present Invention
Hereinafter, preferred embodiments of the optical fiber cable according to the present invention will be described with reference to the attached drawings.
FIG. 1 is a view showing an example of an optical fiber cable according to a first embodiment of the present invention, and FIGS. 2A and 2B are views showing an example of the structure of an intermittent tape core.
　図１に示した光ファイバケーブル１０はスロットレス型の光ファイバケーブルであり、例えば丸型のケーブルコア１１と、このケーブルコア１１の周囲に形成されたケーブル外被１２とを有する。
　ケーブルコア１１には、例えば１２心の間欠テープ心線２０を複数枚撚り合わせたサブユニットが複数収容されている。 The optical fiber cable 10 shown in FIG. 1 is a slotless type optical fiber cable, and has, for example, a round cable core 11 and a cable jacket 12 formed around the cable core 11.
The cable core 11 accommodates a plurality of subunits in which, for example, a plurality of 12 intermittent tape filaments 20 are twisted.
　間欠テープ心線とは、複数本の光ファイバ心線が平行一列に配列され、一部、または全ての隣り合う光ファイバ心線同士を連結部と非連結部により間欠的に連結してなるものである。図２Ａは間欠テープ心線を配列方向に開いた状態を、図２Ｂは図２ＡのＢ－Ｂ線矢視断面図をそれぞれ示しており、図示の間欠テープ心線２０は、１２心のテープ心線が２心毎に間欠的に接続されて構成されている。 Intermittent tape cores are formed by arranging a plurality of optical fiber cores in a parallel line and intermittently connecting a part or all of the adjacent optical fiber cores by a connecting part and a non-connecting part. It is. 2A shows a state in which the intermittent tape core is opened in the arrangement direction, and FIG. 2B shows a cross-sectional view taken along the line B-B in FIG. 2A. The line is configured to be intermittently connected every two cores.
　図２Ｂに示すように、各光ファイバ心線２１の周囲には、紫外線硬化樹脂等によるテープ被覆２４が設けられ、例えば２心を一体化した心線同士が連結部２２と非連結部２３により間欠的に連結されている。連結部２２では、テープ被覆２４が連結されており、非連結部２３では、隣り合うテープ被覆２４が連結されずに分離している。なお、間欠テープ心線は、２心毎に連結部と非連結部を設けなくてもよく、例えば１心毎に連結部と非連結部で間欠的に連結してもよい。 As shown in FIG. 2B, a tape coating 24 made of an ultraviolet curable resin or the like is provided around each of the optical fiber cores 21. For example, core wires obtained by integrating two cores are connected by connecting portions 22 and non-connecting portions 23. It is connected intermittently. The tape coating 24 is connected in the connecting portion 22, and the adjacent tape coverings 24 are separated without being connected in the non-connecting portion 23. In addition, the intermittent tape core wire may not be provided with a connection part and a non-connection part every two cores, for example, may be intermittently connected with a connection part and a non-connection part every one core.
　この間欠テープ心線に収容される光ファイバ心線２１は、例えば、標準外径１２５μｍのガラスファイバに被覆外径が２５０μｍ前後の被覆を施した光ファイバ素線と称されるものの外側に、さらに着色被覆を施したものであるが、これに限られるものでは無く、被覆外径が１３５μｍから２２０μｍの範囲、例えば、１６５μｍや２００μｍ程度の細径ファイバであってもよい。細径ファイバを用いれば、高密度実装がより一層容易になる。 The optical fiber core 21 accommodated in the intermittent tape core is, for example, a glass fiber with a standard outer diameter of 125 μm and a coating with a coating outer diameter of about 250 μm. Although the colored coating is applied, it is not limited thereto, and the outer diameter of the coating may be in the range of 135 μm to 220 μm, for example, a small diameter fiber of about 165 μm or 200 μm. The use of small diameter fibers makes high density mounting easier.
　図１に示すサブユニット３３は、例えば１２心の間欠テープ心線２０を複数枚集め、螺旋状に撚って形成され、識別用のバンドル材３４で束ねられている。ケーブルコア１１には、このサブユニット３３を複数集めて例えば螺旋状に撚って形成された光ユニット３０が収容されている。なお、間欠テープ心線２０やサブユニット３３の撚りは、一方向の螺旋状の他、周期的に反転するＳＺ状であってもよい。 The subunit 33 shown in FIG. 1 is formed, for example, by collecting a plurality of 12 intermittent tape cores 20, spirally twisting them, and bundling them with a bundle material 34 for identification. The cable core 11 accommodates the optical unit 30 formed by collecting a plurality of subunits 33 and twisting them in a spiral, for example. The twisting of the intermittent tape core 20 and the subunits 33 may be SZ-like, which is periodically reversed, in addition to spiral in one direction.
　間欠テープ心線２０は、一般的なテープ心線に比べて柔軟性を有しているため、光ユニット３０を間欠テープ心線で構成すれば、光ファイバ心線に側圧が掛かりにくく、光ファイバ心線２１の占有率を上げることができる。なお、光ユニット３０を構成するテープ心線としては、必ずしもこのような間欠テープ心線を用いなくともよく、連結型のテープ心線を用いたり、単心の光ファイバ心線を複数揃えたりしたものであってもよい。 Since the intermittent tape cable 20 is more flexible than a general tape cable, if the optical unit 30 is configured of the intermittent tape cable, it is difficult for side pressure to be applied to the optical fiber cable, and thus the optical fiber The occupancy rate of the core wire 21 can be increased. In addition, it is not necessary to necessarily use such an intermittent tape core as a tape core which comprises the optical unit 30, or it used the connection-type tape core or arranged multiple single optical fiber cores. It may be one.
　また、ケーブルコア１１には、サブユニット３３内に、テンションメンバ３１も収容されている。図１に示したテンションメンバ３１は、サブユニット３３の例えば中央位置に、このサブユニット３３の長手方向に沿って１本ずつ配置されている。なお、本実施形態のサブユニット３３は、テンションメンバ３１の周囲に、間欠テープ心線２０を撚り集めて形成される。このため、間欠テープ心線２０がばらけないようにするためのバンドル材は省略してもよい。 The cable core 11 also accommodates a tension member 31 in the sub unit 33. The tension members 31 shown in FIG. 1 are disposed, for example, at central positions of the subunits 33 one by one along the longitudinal direction of the subunits 33. The sub-unit 33 of the present embodiment is formed by twisting the intermittent tape core wire 20 around the tension member 31. Therefore, a bundle material for preventing the intermittent tape core wire 20 from being separated may be omitted.
　テンションメンバ３１には、引っ張りや圧縮に対する耐力を有する線材として、鋼線、あるいは、非金属材料、例えば、ガラス繊維で形成されたガラス繊維強化プラスチック（ＧＦＲＰ）や撚り糸が使用される。分散して配置した各テンションメンバ３１を合わせることで、全体として、光ファイバケーブルに加わる、引っ張りや圧縮に対する耐力を有している。
　なお、テンションメンバ３１をＧＦＲＰや撚り糸で形成すれば、金属製のテンションメンバを設けた場合に比べてケーブルの軽量化を達成することができる。また、軽量であるため、ケーブルコア１１内の光ファイバに側圧が掛かり難くなる。なお、ケーブルコア１１内への止水のために、テンションメンバ３１に吸水パウダーを塗布してもよい。 For the tension member 31, a steel wire or a non-metallic material, for example, a glass fiber reinforced plastic (GFRP) formed of glass fiber or a twisted yarn is used as a wire having a resistance against tension and compression. By combining the tension members 31 arranged in a dispersed manner, it has a resistance against tension and compression applied to the optical fiber cable as a whole.
If the tension member 31 is formed of GFRP or a twisted yarn, weight reduction of the cable can be achieved as compared with the case where a metal tension member is provided. In addition, because of the light weight, it becomes difficult for side pressure to be applied to the optical fiber in the cable core 11. The water absorption powder may be applied to the tension member 31 in order to stop water in the cable core 11.
　一方、ケーブルコア１１は、光ユニット３０を押さえ巻きテープ３２で縦添えまたは横巻きして丸型にまとめられている。押さえ巻きテープ３２は、例えばポリエチレンテレフタレート（ＰＥＴ）などを含む不織布が用いられ、光ユニット３０の外側から巻きつけられている。
　上記のように光ユニット３０自体も撚って形成されている場合は、押さえ巻きテープは省略してもよいが、押さえ巻きテープを設ければ、ケーブルコアを丸型にまとめやすくなる。なお、丸型にさらにまとめやすくするには、介在を使用してもよい。 On the other hand, the cable core 11 is put together in a round shape by vertically pressing or laterally winding the optical unit 30 with a winding tape 32. The holding and winding tape 32 is, for example, a non-woven fabric containing polyethylene terephthalate (PET) or the like, and is wound from the outside of the light unit 30.
As described above, when the optical unit 30 itself is also formed by twisting, the press-winding tape may be omitted, but if the press-winding tape is provided, the cable core can be easily rounded. In addition, in order to make it easy to put it together in a round shape, you may use intervention.
　押さえ巻きテープ３２の外側は、例えばＰＥ（ポリエチレン）、ＰＶＣ（ポリ塩化ビニル）等で構成されたケーブル外被１２で覆われている。また、押さえ巻きテープ３２に吸水パウダーを塗布してもよい。
　なお、図示は省略するが、ケーブル外被１２には、ケーブル外被１２をケーブル長手方向に引き裂くための引き裂き紐をケーブル外被１２の押出成形時に埋設してもよい。 The outer side of the holding and winding tape 32 is covered with a cable jacket 12 made of, for example, PE (polyethylene), PVC (polyvinyl chloride) or the like. Alternatively, the water absorbent powder may be applied to the holding and winding tape 32.
Although illustration is omitted, in the cable jacket 12, a tear-off string for tearing the cable jacket 12 in the longitudinal direction of the cable may be embedded at the time of extrusion molding of the cable jacket 12.
　第１実施形態による光ファイバケーブルによれば、スロットレス型の構造であるため、高密度実装が可能である。
　また、テンションメンバ３１がケーブル外被内に無く、ケーブルコア内の個々のサブユニット３３内にのみ分散して設けられていることから、曲げの方向性が無く、従来のスロットレス型の光ファイバケーブルに比べ、管路に布設しやすい光ファイバケーブルを提供することができる。また、テンションメンバ３１がサブユニット３３内に設けられており、従来のスロットレス型の光ファイバのように、ケーブル外被にテンションメンバが埋め込まれていないため、その分、ケーブル外被の厚みを無くすことができ、ケーブルの小径化を図ることができる。 According to the optical fiber cable according to the first embodiment, since it has a slotless type structure, high density mounting is possible.
In addition, since the tension members 31 are not provided in the cable sheath but are dispersedly provided only in the individual sub-units 33 in the cable core, there is no directivity of bending and the conventional slotless type optical fiber It is possible to provide an optical fiber cable that can be easily installed in a conduit compared to a cable. Further, since the tension member 31 is provided in the sub unit 33 and the tension member is not embedded in the cable jacket as in the conventional slotless type optical fiber, the thickness of the cable jacket is increased by that amount. This can be eliminated, and the diameter of the cable can be reduced.
　さらに、テンションメンバ３１の周囲に間欠テープ心線２０を撚り合わせて配置すればよいので、このような構造であれば、製造しやすい。 Furthermore, since the intermittent tape core wire 20 may be twisted and disposed around the tension member 31, such a structure is easy to manufacture.
　図３は、本発明の第２実施形態による光ファイバケーブルの一例を示す図である。
　図３に示した光ファイバケーブル１０Ａもスロットレス型の光ファイバケーブルであり、例えば丸型のケーブルコア１１を有し、図１に示した例と同様に、ケーブルコア１１には、間欠テープ心線２０を複数枚撚り合わせたサブユニット３３を複数集め、サブユニット３３を螺旋状に撚って形成された光ユニット３０が収容されている。
　また、テンションメンバ３１は、サブユニット３３の中央位置に、このサブユニット３３の長手方向に沿って１本ずつ配置されているが、図３に示すように、テンションメンバ３１を有したサブユニット３３は、ケーブルコア１１の中央位置近傍のみに配置され、その周囲には、テンションメンバを設けていないサブユニット３３が配置されている。 FIG. 3 is a view showing an example of an optical fiber cable according to a second embodiment of the present invention.
The optical fiber cable 10A shown in FIG. 3 is also a slotless type optical fiber cable, and has, for example, a round cable core 11, and as in the example shown in FIG. A plurality of subunits 33 in which a plurality of wires 20 are twisted together is collected, and an optical unit 30 formed by twisting the subunits 33 in a spiral shape is accommodated.
Further, although one tension member 31 is disposed at a central position of the subunit 33 along the longitudinal direction of the subunit 33, as shown in FIG. 3, the subunit 33 having the tension member 31 is provided. Is disposed only in the vicinity of the central position of the cable core 11, and a subunit 33 not provided with a tension member is disposed around it.
　この場合、ケーブルコア１１の中央位置近傍に配置された計３本のテンションメンバ３１を合わせることで、全体として、光ファイバケーブルに加わる、引っ張りや圧縮に対する耐力を有している。なお、ケーブル外被１２等の構成は第１実施形態と同じであり、詳細な説明は省略する。 In this case, by combining a total of three tension members 31 disposed in the vicinity of the center position of the cable core 11, a resistance against tension or compression applied to the optical fiber cable as a whole is obtained. The configuration of the cable jacket 12 and the like is the same as that of the first embodiment, and the detailed description will be omitted.
　第２実施形態による光ファイバケーブルによれば、第１実施形態と同様に、スロットレス構造であり、高密度実装が可能になる。
　また、テンションメンバ３１を設けたサブユニット３３がケーブルコア１１の中央位置にのみ配置されており、この場合にも、光ユニット、すなわちケーブルコアの中心付近にテンションメンバが集中して配置されるので、曲げの方向性が無く、管路に布設しやすい光ファイバケーブルを提供することができる。さらに、全てのサブユニット３３にテンションメンバ３１を設けた場合に比べて、光ファイバケーブルの可撓性の向上を図ることも可能になる。 The optical fiber cable according to the second embodiment has a slotless structure as in the first embodiment and enables high-density mounting.
Further, the sub-unit 33 provided with the tension member 31 is disposed only at the central position of the cable core 11. Also in this case, the tension members are concentratedly disposed near the center of the optical unit, ie, the cable core. It is possible to provide an optical fiber cable which is easy to install in a conduit without bending directionality. Furthermore, the flexibility of the optical fiber cable can be improved as compared to the case where the tension members 31 are provided in all the subunits 33.
　今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した意味ではなく、請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the meaning described above but by the scope of the claims, and it is intended to include all the modifications within the meaning and scope equivalent to the scope of the claims.
１０，１０Ａ…光ファイバケーブル、１１…ケーブルコア、１２…ケーブル外被、２０…間欠テープ心線、２１…光ファイバ心線、２２…連結部、２３…非連結部、２４…テープ被覆、３０…光ユニット、３１…テンションメンバ、３２…押さえ巻きテープ、３３…サブユニット、３４…バンドル材。 DESCRIPTION OF SYMBOLS 10, 10A ... Optical fiber cable, 11 ... Cable core, 12 ... Cable jacket, 20 ... Intermittent tape core, 21 ... Optical fiber core, 22 ... Connection part, 23 ... Non-connection part, 24 ... Tape coating, 30 ... light unit, 31 ... tension member, 32 ... holding tape, 33 ... subunit, 34 ... bundle material.

Claims (3)

  1. 　複数本の光ファイバ心線または該光ファイバ心線を並べたテープ心線からなる光ユニットと、該光ユニットが収納されるケーブルコアと、該ケーブルコアの周囲に設けられたケーブル外被とを備えたスロットレス型の光ファイバケーブルであって、
    　前記光ユニットは、前記光ファイバ心線または前記テープ心線を複数撚り合わせた複数のサブユニットで構成され、該サブユニット内にのみテンションメンバが設けられ、前記ケーブル外被内の前記サブユニット以外には前記テンションメンバが設けられていない、光ファイバケーブル。     An optical unit comprising a plurality of optical fiber cores or a tape core line in which the optical fiber cores are arranged; a cable core in which the optical unit is accommodated; and a cable jacket provided around the cable core A slotless type optical fiber cable,
    The optical unit is composed of a plurality of subunits in which the optical fiber core or the tape core is twisted together, and a tension member is provided only in the subunit, and other than the subunit in the cable jacket. An optical fiber cable, in which the tension member is not provided.
  2. 　前記テンションメンバが前記サブユニットの中央位置に配置されている、請求項１に記載の光ファイバケーブル。 The fiber optic cable according to claim 1, wherein the tension member is disposed at a central position of the subunit.
  3. 　前記サブユニットが撚り合わされて前記光ユニットを構成し、前記テンションメンバを設けた前記サブユニットが前記光ユニットの中央位置近傍に配置され、その周囲には、前記テンションメンバを設けていないサブユニットが配置されている、請求項１または２に記載の光ファイバケーブル。
          The subunits are twisted together to form the optical unit, and the subunit provided with the tension member is disposed in the vicinity of the central position of the optical unit, and a subunit without the tension member is provided around the subunit. A fiber optic cable according to claim 1 or 2, arranged.
PCT/JP2018/024056 2017-06-26 2018-06-25 Optical fiber cable WO2019004147A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50105845U (en) * 1974-02-08 1975-08-30
JPS57182705U (en) * 1981-05-18 1982-11-19
WO2012177476A1 (en) * 2011-06-22 2012-12-27 Corning Cable Systems Llc Multi- fiber, fiber optic cable furcation assemblies comprising constrained optical fibers within an optical fiber sub-unit
WO2016188576A1 (en) * 2015-05-28 2016-12-01 Prysmian S.P.A. Optical cable for terrestrial networks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50105845U (en) * 1974-02-08 1975-08-30
JPS57182705U (en) * 1981-05-18 1982-11-19
WO2012177476A1 (en) * 2011-06-22 2012-12-27 Corning Cable Systems Llc Multi- fiber, fiber optic cable furcation assemblies comprising constrained optical fibers within an optical fiber sub-unit
WO2016188576A1 (en) * 2015-05-28 2016-12-01 Prysmian S.P.A. Optical cable for terrestrial networks

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