WO2022264523A1 - 光ファイバケーブル - Google Patents
光ファイバケーブル Download PDFInfo
- Publication number
- WO2022264523A1 WO2022264523A1 PCT/JP2022/006832 JP2022006832W WO2022264523A1 WO 2022264523 A1 WO2022264523 A1 WO 2022264523A1 JP 2022006832 W JP2022006832 W JP 2022006832W WO 2022264523 A1 WO2022264523 A1 WO 2022264523A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheath
- tension member
- optical fiber
- fiber cable
- peripheral surface
- Prior art date
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 68
- 230000002093 peripheral effect Effects 0.000 claims description 35
- 239000000853 adhesive Substances 0.000 claims description 30
- 230000001070 adhesive effect Effects 0.000 claims description 29
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 5
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 4
- 239000011151 fibre-reinforced plastic Substances 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 206010017076 Fracture Diseases 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 241000239290 Araneae Species 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Classifications
-
- 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
- Patent Document 1 discloses an optical fiber cable that includes a core having a plurality of optical fibers, a sheath covering the core, and a tear string and tension member embedded in the sheath. A tear string is placed in contact with the core and is used to tear the sheath to remove the core.
- the tear string is arranged so as to be in contact with the core, so there is a possibility that the tear string may drop radially inward of the sheath due to lateral pressure. If the tear string falls into the sheath, the tear string may wind around the core when tearing the sheath, thereby damaging the optical fiber.
- an optical fiber cable includes a core having a plurality of optical fibers, a sheath covering the core, and a tension member embedded in the sheath,
- the sheath exists between the tension member and the core, and in a cross-sectional view, the outer peripheral surface of the tension member has an adhesive area that is attached to the sheath and a non-adhesive area that is not attached to the sheath. and is provided.
- FIG. 1 is a cross-sectional view of an optical fiber cable according to this embodiment
- FIG. FIG. 2 is a diagram for explaining an operation of taking out a core from the optical fiber cable of FIG. 1; It is a figure explaining the process following FIG. 2A. It is a figure explaining the process following FIG. 2B.
- the optical fiber cable 10 includes a core 2, a pair of tension members 3, and a sheath 4.
- the core 2 has a plurality of optical fiber units 1 and a pressure wrap 2a covering these optical fiber units 1.
- Each optical fiber unit 1 has a plurality of optical fibers 1a and a binding material 1b for binding the plurality of optical fibers 1a.
- an optical fiber core wire an optical fiber bare wire, an optical fiber tape core wire, or the like can be used.
- the plurality of optical fibers 1a may form a so-called intermittently fixed ribbon.
- the intermittent fixing tape core wire the plurality of optical fibers 1a are adhered to each other so that when pulled in a direction perpendicular to the extending direction, they spread out in a mesh shape (spider web shape). More specifically, one optical fiber 1a is bonded to each of its adjacent optical fibers 1a at different positions in the longitudinal direction, and the adjacent optical fibers 1a are spaced apart by a certain distance in the longitudinal direction. are glued together.
- the mode of the optical fiber 1a included in the core 2 is not limited to the intermittently fixed tape core wire, and may be changed as appropriate.
- a nonwoven fabric, a polyester tape, or the like can be used as the press wrap 2a.
- a water-absorbing tape obtained by imparting water-absorbing properties to a non-woven fabric, polyester tape, or the like may be used.
- the waterproof performance of the optical fiber cable 10 can be enhanced.
- the pressure winding 2a may be omitted.
- a so-called notch is not formed on the outer peripheral surface of the sheath 4 .
- a notch is a portion that guides the progression of fracture when the sheath 4 is torn or cut open.
- a general shape of the notch is a V-shaped groove recessed radially inward from the outer peripheral surface of the sheath 4 and extending in the longitudinal direction.
- the optical fiber cable 10 of this embodiment is configured so that the sheath 4 can be easily torn without a notch. Note that if there is a notch on the outer peripheral surface of the sheath 4, water may enter from the cable gripping portion of the closure or the like.
- the outer peripheral surface of the tension member 3 includes a non-adhesive area 3a and an adhesive area 3b.
- the non-bonded region 3 a is a portion of the outer peripheral surface of the tension member 3 that is not bonded to the sheath 4 .
- the adhesion region 3 b is a portion of the outer peripheral surface of the tension member 3 that is adhered to the sheath 4 .
- the inclusion 5 is curved along the outer peripheral surface of the tension member 3 .
- a portion of the outer peripheral surface of the tension member 3 that is covered with the inclusions 5 is the non-bonded area 3a, and a portion that is not covered with the inclusions 5 is the bonded area 3b.
- Such a structure can be realized by extruding the sheath 4 with the tension member 3 and the interposition 5 vertically attached. More specifically, when the sheath 4 is extruded, the outer peripheral surface of the tension member 3 is adhered to the sheath 4 at the portion where the inclusion 5 does not exist. On the other hand, contact and adhesion between the sheath 4 and the tension member 3 are suppressed in the portion where the inclusion 5 exists.
- An adhesive may be applied to the entire outer peripheral surface of the tension member 3 in order to increase the adhesive strength between the tension member 3 and the sheath 4 in the adhesive region 3b (region where the inclusion 5 does not exist).
- a tool K is used to make a cut N1 (see FIG. 2B) from the outer peripheral surface of the sheath 4 toward the tension member 3.
- the notches N1 are made toward the tension members 3 from two locations separated in the circumferential direction of the outer peripheral surface of the sheath 4 .
- the operator can grasp the position of the tension member 3 from the bending directionality of the optical fiber cable 10 caused by the two tension members 3, for example.
- the optical fiber cable 10 is less likely to bend in the direction in which the neutral line L extends, and more likely to bend in the vertical direction Z. As shown in FIG.
- the outer peripheral surface of the sheath 4 may be provided with a mark (for example, colored or minute projection) indicating the position of the tension member 3 .
- a mark for example, colored or minute projection
- the operator can grasp the position of the tension member 3 by the mark.
- the position of the tension member 3 may be confirmed by checking the end surface of the optical fiber cable 10 in the longitudinal direction.
- Tool K may be, for example, a cutter. Alternatively, a nipper or the like may be used as the tool K when making the cut N1 at the end of the optical fiber cable 10 in the longitudinal direction.
- force is applied to the sheath 4 so as to open the incision N1. More specifically, a +Z side force is applied to the first portion 4a of the sheath 4, and a -Z side force is applied to the second portion 4b.
- the first portion 4a and the second portion 4b of the sheath 4 are likely to be pulled apart in the vertical direction Z in the non-adhesive region 3a of the tension member 3 .
- the notch N1 is made in the sheath 4, and then force is applied to the sheath 4 so as to open the notch N1.
- the sheath 4 is naturally split in the order of the incision N1, the non-bonded region 3a, and the tear N2.
- the first portion 4a and the second portion 4b are connected at both the radially outer side of the tension member 3 and the radially inner side of the tension member 3 . Therefore, the strength of the sheath 4 is ensured, and cracks or the like in the sheath 4 can be suppressed when lateral pressure acts on the optical fiber cable 10 .
- the optical fiber cable 10 of this embodiment includes a core 2 having a plurality of optical fibers 1a, a sheath 4 covering the core 2, and a tension member 3 embedded in the sheath 4.
- a sheath 4 exists between the tension member 3 and the core 2, and in a cross-sectional view, the outer peripheral surface of the tension member 3 has an adhesive region 3b that is adhered to the sheath 4 and a non-adhesive region that is not adhered to the sheath 4.
- a region 3a is provided. According to this configuration, since the sheath 4 can be torn without using a tearing string, damage to the optical fiber due to the tearing string coming into contact with the optical fiber can be suppressed. In addition, both the strength of the sheath 4 and workability when taking out the core 2 from the optical fiber cable 10 can be achieved.
- the optical fiber cable 10 further includes an inclusion 5 arranged along the outer peripheral surface of the tension member 3, and the portion of the outer peripheral surface of the tension member 3 covered with the inclusion 5 is the non-adhesive region 3a. is.
- the non-adhesive region 3a can be easily provided by extruding the sheath 4 with the inclusion 5 along with the tension member 3.
- the position and size of the non-adhesive region 3a can be easily adjusted.
- the inclusion 5 may be wound around the tension member 3 in a spiral or SZ shape.
- the optical fiber cable 10 when the optical fiber cable 10 is manufactured, it is possible to make it difficult for a gap to occur between the inclusion 5 and the tension member 3 . Therefore, it is possible to suppress the phenomenon that the non-adhesive region 3a becomes smaller due to the sheath 4 entering between the inclusion 5 and the tension member 3 .
- the outer peripheral surface of the sheath 4 is circular. Therefore, it is easy to insert the optical fiber cable 10 through a duct or the like by pneumatic feeding. Cable grips in closures used underground may employ a method of waterproofing the optical fiber cable 10 by compressing it from the outside in the radial direction with rubber, urethane, or the like. In this case, since the outer peripheral surface of the sheath 4 is circular, pressure is applied uniformly to the sheath 4, which is effective from the viewpoint of waterproofness.
- no notches are formed on the outer peripheral surface of the sheath 4 . Therefore, for example, when the optical fiber cable 10 is laid outdoors, water can be prevented from moving along the notch. In particular, when the optical fiber cable 10 is drawn into the closure, it is possible to prevent water from entering the closure along the notch.
- a preferable range of the ratio of the non-bonded area 3a to the outer peripheral surface of the tension member 3 will be described below using specific examples.
- the present invention is not limited to the following examples.
- 12 cores of intermittently fixed tape core wires are used as the plurality of optical fibers 1a.
- the total number of optical fibers 1a included in the core 2 is 864.
- the outer diameter of the tension member 3 was 1.5 mm
- the inner diameter of the sheath 4 was 11.7 mm
- the outer diameter of the sheath 4 was 18.7 mm. That is, the thickness of the sheath 4 at the portion where the tension member 3 is not embedded is 3.5 mm. In the radial direction, the thickness of the sheath 4 positioned inside the tension member 3 is 1 mm, and the thickness of the sheath 4 positioned outside the tension member 3 is 1 mm.
- An adhesive was applied to the entire outer peripheral surface of the tension member 3 to increase the adhesive strength with the sheath 4 .
- a polyester tape was used as the inclusion 5, and this tape was arranged along the outer peripheral surface of the tension member 3.
- the tape as the inclusion 5 was extended linearly along the longitudinal direction.
- the data with a ratio of the non-bonded region 3a of 100% indicates a sample in which the tension member 3 is covered with the inclusions 5 over the entire circumference
- the data with a ratio of the non-bonded region 3a of 0% indicates the inclusion
- the result of the temperature cycle test is the Telcordia GR20 Temperature cycling test, and if the increase in optical transmission loss during the test is within 0.15dB/km compared to before the test, it is considered good (OK) and is 0.15dB. /km was defined as defective (NG).
- a cut N1 having a length of 5 cm was made in the longitudinal direction with a nipper, and a force was applied so as to separate the first part 4a and the second part 4b of the sheath 4 in the vertical direction Z by hand.
- a force was applied so as to separate the first part 4a and the second part 4b of the sheath 4 in the vertical direction Z by hand.
- the ratio of the non-bonded area 3a to the outer peripheral surface of the tension member 3 is 20 to 80% in cross-sectional view.
- the tension member 3 can effectively suppress the expansion and contraction of the sheath 4 in the longitudinal direction, and the sheath 4 can easily be split along the non-adhesive region 3a to ensure workability of opening.
- the inclusion 5 is linearly aligned with the tension member 3.
- the result shows that the ratio of the non-adhesive region 3a is preferably 20 to 80% as in Table 1 even when the inclusion 5 is wound around the tension member 3 in a spiral or SZ shape. became.
- the tension member 3 was wound in a spiral or SZ shape, the winding pitch in the longitudinal direction was changed in the range of 100 to 500 mm.
- fiber optic cable 10 may not include interposer 5 .
- a combination is selected in which the mutual adhesiveness is negligible, and an adhesive is applied to a part of the outer peripheral surface of the tension member 3, thereby An adhesive area 3a and an adhesive area 3b may be provided.
- Fiber optic cable 10 may include a tear string embedded in sheath 4 .
- a tearing method using a tearing string is also possible, thereby making it easier to expose the core 2. can.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Insulated Conductors (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
本願は、2021年6月16日に、日本に出願された特願2021-099851号に基づき優先権を主張し、その内容をここに援用する。
図1に示すように、光ファイバケーブル10は、コア2と、一対のテンションメンバ3と、シース4と、を備える。コア2は、複数の光ファイバユニット1と、これらの光ファイバユニット1を覆う押さえ巻き2aと、を有している。各光ファイバユニット1は、複数の光ファイバ1aと、複数の光ファイバ1aを結束させる結束材1bと、を有している。
本実施形態では、コア2の中心軸線Oに沿う方向を長手方向という。長手方向に直交する横断面視において、中心軸線Oに交差する方向を径方向といい、中心軸線O回りに周回する方向を周方向という。横断面視において、一対のテンションメンバ3の各中心を通る直線を、中立線Lという。横断面視において、中立線Lに対して垂直な方向を垂直方向Zという。垂直方向Zにおける一方側を+Z側、他方側を-Z側と表す。シース4のうち、中立線Lよりも+Z側の部分を第1部分4aといい、中立線Lよりも-Z側の部分を第2部分4bという。
なお、コア2に含まれる光ファイバ1aの態様は間欠固定テープ心線に限られず、適宜変更してもよい。
切込N1を入れた後、その切込N1を開くように、シース4に力を加える。より具体的には、シース4の第1部分4aに対して+Z側に向けた力を加え、第2部分4bに対して-Z側に向けた力を加える。ここで、テンションメンバ3の非接着領域3aでは、シース4の第1部分4aと第2部分4bとが垂直方向Zに引き離されやすい。このため、仮に工具Kで入れた切込N1がテンションメンバ3に到達していなかったとしても、上記の通りシース4に力を加えると、引張応力が集中することにより、切込N1と非接着領域3aとを結ぶようにシース4の破断が進行する。
光ファイバケーブル10は、シース4に埋設された引裂き紐を備えていてもよい。前記実施形態のようにテンションメンバ3の非接着領域3aを用いたシース4の引裂き方法に加えて、引裂き紐を用いた引裂き方法も可能としておくことで、コア2をより露出させやすくすることができる。
Claims (6)
- 複数の光ファイバを有するコアと、
前記コアを覆うシースと、
前記シース中に埋設されたテンションメンバと、を備え、
前記テンションメンバと前記コアとの間に前記シースが存在し、
横断面視において、前記テンションメンバの外周面には、前記シースに接着された接着領域と、前記シースに接着されていない非接着領域と、が設けられている、光ファイバケーブル。 - 前記テンションメンバの外周面に沿って配置された介在物をさらに備え、
前記テンションメンバの外周面のうち前記介在物に覆われた部分が前記非接着領域である、請求項1に記載の光ファイバケーブル。 - 前記介在物は、螺旋状またはSZ状に前記テンションメンバに巻き付けられている、請求項2に記載の光ファイバケーブル。
- 横断面視において、前記テンションメンバの外周面に対する前記非接着領域の割合は20~80%の範囲内である、請求項1から3のいずれか1項に記載の光ファイバケーブル。
- 横断面視において、前記シースの外周面は円形状である、請求項1から4のいずれか1項に記載の光ファイバケーブル。
- 前記シースの外周面にはノッチが形成されていない、請求項1から5のいずれか1項に記載の光ファイバケーブル。
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JP2023529511A JPWO2022264523A1 (ja) | 2021-06-16 | 2022-02-21 | |
CN202280011760.5A CN116802534A (zh) | 2021-06-16 | 2022-02-21 | 光纤线缆 |
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Application Number | Priority Date | Filing Date | Title |
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JP2021-099851 | 2021-06-16 | ||
JP2021099851 | 2021-06-16 |
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WO2022264523A1 true WO2022264523A1 (ja) | 2022-12-22 |
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PCT/JP2022/006832 WO2022264523A1 (ja) | 2021-06-16 | 2022-02-21 | 光ファイバケーブル |
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JP (1) | JPWO2022264523A1 (ja) |
CN (1) | CN116802534A (ja) |
WO (1) | WO2022264523A1 (ja) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56500428A (ja) * | 1979-01-18 | 1981-04-02 | ||
JPS63259608A (ja) * | 1987-03-31 | 1988-10-26 | アメリカン テレフォン アンド テレグラフ カムパニー | 光ファイバケーブル |
US5310964A (en) * | 1991-07-23 | 1994-05-10 | Bicc Public Limited Company | Electric and communication cables |
US20150370026A1 (en) * | 2014-06-23 | 2015-12-24 | Corning Optical Communications LLC | Optical fiber cable |
JP2017068051A (ja) * | 2015-09-30 | 2017-04-06 | 三菱電線工業株式会社 | 光ファイバケーブルに用いるテンションメンバ構造及びそのテンションメンバを用いた光ファイバケーブル構造 |
JP2018146787A (ja) * | 2017-03-06 | 2018-09-20 | 株式会社フジクラ | 光ファイバケーブルおよび光ファイバケーブルの製造方法 |
JP2020204685A (ja) * | 2019-06-17 | 2020-12-24 | 古河電気工業株式会社 | 光ファイバケーブル |
-
2022
- 2022-02-21 WO PCT/JP2022/006832 patent/WO2022264523A1/ja active Application Filing
- 2022-02-21 JP JP2023529511A patent/JPWO2022264523A1/ja not_active Withdrawn
- 2022-02-21 CN CN202280011760.5A patent/CN116802534A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56500428A (ja) * | 1979-01-18 | 1981-04-02 | ||
JPS63259608A (ja) * | 1987-03-31 | 1988-10-26 | アメリカン テレフォン アンド テレグラフ カムパニー | 光ファイバケーブル |
US5310964A (en) * | 1991-07-23 | 1994-05-10 | Bicc Public Limited Company | Electric and communication cables |
US20150370026A1 (en) * | 2014-06-23 | 2015-12-24 | Corning Optical Communications LLC | Optical fiber cable |
JP2017068051A (ja) * | 2015-09-30 | 2017-04-06 | 三菱電線工業株式会社 | 光ファイバケーブルに用いるテンションメンバ構造及びそのテンションメンバを用いた光ファイバケーブル構造 |
JP2018146787A (ja) * | 2017-03-06 | 2018-09-20 | 株式会社フジクラ | 光ファイバケーブルおよび光ファイバケーブルの製造方法 |
JP2020204685A (ja) * | 2019-06-17 | 2020-12-24 | 古河電気工業株式会社 | 光ファイバケーブル |
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JPWO2022264523A1 (ja) | 2022-12-22 |
CN116802534A (zh) | 2023-09-22 |
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