WO2022264400A1 - 光ファイバケーブル - Google Patents
光ファイバケーブル Download PDFInfo
- Publication number
- WO2022264400A1 WO2022264400A1 PCT/JP2021/023183 JP2021023183W WO2022264400A1 WO 2022264400 A1 WO2022264400 A1 WO 2022264400A1 JP 2021023183 W JP2021023183 W JP 2021023183W WO 2022264400 A1 WO2022264400 A1 WO 2022264400A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical fiber
- string
- outer cover
- jacket
- fiber cable
- Prior art date
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 73
- 239000000835 fiber Substances 0.000 claims description 11
- KAATUXNTWXVJKI-UHFFFAOYSA-N cypermethrin Chemical compound CC1(C)C(C=C(Cl)Cl)C1C(=O)OC(C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 KAATUXNTWXVJKI-UHFFFAOYSA-N 0.000 description 9
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 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
- the present disclosure relates to an optical fiber cable having a ripping string that is internally installed in the optical fiber cable and used for ripping.
- optical fiber is used in the communication network for providing multimedia services.
- an optical fiber cable is used in which bundled optical fiber core wires are covered.
- the optical fiber cable has a groove-type slot rod and has a structure in which the optical fiber core is accommodated in the groove.
- a cable is used (see, for example, Patent Document 1).
- FIG. 1 is a cross section of a non-slot type optical fiber cable 1, 11 is a jacket, 12 is a tensile member, and 13 is a cord for tearing the jacket (hereinafter, “string for tearing jacket” is called “ripping string”). ), and 14 is an optical fiber core wire.
- a tensile strength member 12 is embedded in the jacket 11 parallel to the longitudinal direction of the optical fiber cable 1 .
- the tensile strength member 12 protects the optical fiber cable 14 from tension acting on the optical fiber cable 1 in the longitudinal direction, is made of a member such as steel wire or fiber reinforced plastic, and is thick enough to exhibit sufficient rigidity. have
- the tensile strength member 12 may be composed of a plurality of pieces (see Patent Document 2, for example).
- a tearing string 13 is also embedded in the jacket 11 for easily tearing the jacket and taking out the optical fiber core wire 14 inside the optical fiber cable. 13 can be exposed and removed.
- the tensile member 12 is essential for protecting the optical fiber cable 1 and the optical fiber core wire 14.
- the thickness of the tensile member 12 hinders reduction of the cable diameter, and if the tensile member 12 is arranged at an asymmetrical position in the optical fiber cable 1, it may cause bending directionality. This will reduce the ease of handling the cable.
- Patent Document 2 by arranging a plurality of tensile members at symmetrical positions, it is possible to reduce the diameter of each tensile member and relax the directionality of bending.
- the present disclosure provides an optical fiber cable in which the tear cord is exposed before the tensile members when the jacket having three or more tensile members is shaved with a knife or the like. aim.
- the optical fiber cable of the present disclosure arranges the tear cord in the longitudinal direction outside the tensile strength member inside the jacket.
- the fiber optic cable according to the present disclosure includes: optical fiber core wire; a jacket covering the optical fiber core wire; three or more tensile strength members arranged along the longitudinal axis of the optical fiber core inside the jacket; In a partial cross section perpendicular to the longitudinal direction of the outer cover, a part of the outer circumference is outside the outer tangent line of the outer circumference of the three or more tensile strength members, and a cross section perpendicular to the longitudinal direction of the outer cover In, a part of the outer circumference is in contact with the inner circumference of the outer cover, or a tear string that is inside the inner circumference of the outer cover; Prepare.
- a fiber optic cable according to the present disclosure can:
- the outer tangent lines of the three or more tensile strength members are outside the inner circumference of the jacket.
- a fiber optic cable according to the present disclosure can:
- the tear string is composed of a plurality of strings.
- a fiber optic cable according to the present disclosure can:
- the tear string has a structure in which the plurality of strings are twisted together.
- a fiber optic cable according to the present disclosure can:
- the tear string has a structure in which the plurality of strings are woven together.
- a fiber optic cable according to the present disclosure can:
- the tear string is formed by bonding the plurality of strings.
- a fiber optic cable can: At least one string is arranged in a straight line, and at least one string has a wave shape that repeatedly contacts and separates from the string arranged in the straight line (hereinafter abbreviated as "linear string").
- the cord arranged in a wavy shape has a portion in contact with the linear cord that is adhered or welded and is located inside the outer tangent line, and a portion that is separated from the linear cord is the Outside the outer tangent.
- a fiber optic cable according to the present disclosure can: In the outer cover, the outer cover thickness of the portion where the tear string is installed is thinner than the outer cover thickness of the portion where the tear string is not installed.
- an optical fiber cable in which, when the sheath having three or more tensile strength members is cut out with a knife or the like, the ripped string is exposed before the tensile members are exposed.
- 1 is an example of a cross section of a non-slot type optical fiber cable according to the present invention
- It is an example of the cross section of the optical fiber cable according to the present invention near the rip cord.
- It is an example of the cross section of the optical fiber cable according to the present invention near the rip cord.
- It is an example of the cross section of the optical fiber cable according to the present invention near the rip cord.
- It is an example of the cross section of the optical fiber cable which concerns on this invention.
- It is an example of the cross section of the optical fiber cable which concerns on this invention.
- It is an example of the cross section of the optical fiber cable which concerns on this invention.
- FIG. 2 shows an example of a cross section perpendicular to the longitudinal direction of the optical fiber cable according to the embodiment of the present invention.
- 1 is an optical fiber cable
- 11 is a jacket
- 12 is a tension member
- 13 is a tear cord
- 14 is an optical fiber core wire
- 17 is an outer tangent wire.
- the optical fiber cable 1 includes a jacket 11, a tensile strength member 12, a tear string 13, and an optical fiber core wire 14.
- the jacket 11 covers one or more optical fibers 14 .
- the jacket 11 may directly cover the optical fiber core wire 14 or may cover the optical fiber core wire 14 covered with a sheath together with the sheath.
- the jacket 11 has three or more tensile strength members 12 along the long axis of the optical fiber core wire 14 inside.
- the tensile strength member 12 may be composed of a member such as steel wire or fiber reinforced plastic.
- the inside of the jacket 11 refers to a region between the inner circumference and the outer circumference of the jacket 11 in the cross section of the optical fiber cable 1 shown in FIG.
- each of the three or more tensile strength members 12 is positioned outside of the common tangent line with the outer circumference of the adjacent tensile strength members 12.
- An outer tangent line 17 is defined as the perimeter of the rounded polygon formed by connecting with .
- FIG. 2 exemplifies the outer tangent line 17 of a rounded square, but is not limited to this.
- the outer tangent line 17 is located outside the inner circumference of the outer cover 11 in a cross section perpendicular to the longitudinal direction of the outer cover 11 .
- a portion of the outer circumference of the rip string 13 is outside the outer tangent line 17 in at least a partial cross section perpendicular to the longitudinal direction of the jacket 11 .
- This is Requirement 1.
- the outer cover 11 is cut at an arbitrary cross section of the outer cover 11 and the string 13 is cut.
- the tearing string 13 can be exposed by shaving it from the side with a knife or the like.
- a part of the outer circumference of the tear string 13 is in contact with the inner circumference of the front jacket 11 or inside the inner circumference of the jacket 11 in a cross section perpendicular to the longitudinal direction of the jacket 11 .
- a part of the outer circumference of the tear string 13 is in contact with the inner circumference of the outer cover 11 or inside the inner circumference of the outer cover 11 in all cross sections perpendicular to the longitudinal direction of the outer cover 11 .
- the rip string 13 may be positioned outside the inner circumference of the outer cover 11 as long as the entire outer cover 11 can be cut cleanly.
- the rip cord 13 satisfy requirements 1 and 2 above in at least a partial cross section perpendicular to the longitudinal direction of the jacket 11 .
- the rip cord 13 may satisfy both requirements 1 and 2 by being positioned between two strength members 12 as shown in FIG.
- the rip cord 13 may satisfy requirements 1 and 2 at different cross-sections perpendicular to the longitudinal direction of the jacket 11, respectively.
- the rip cords 13 do not necessarily have to be arranged at two locations, and may be arranged at three or more locations.
- the surface of the outer cover 11 may be provided with a mark indicating a position to cut the outer cover 11 with a knife or the like. for example, If a part of the outer circumference of the rip string 13 is outside the outer tangent line 17 in only a part of the cross section perpendicular to the longitudinal direction of the jacket 11, the outer circumference of the rip string 13 in the surface of the jacket 11 By providing a mark on the outer peripheral portion of the outer cover 11 of a cross section in which a part of is outside the outer tangent line 17, the tear string 13 can be exposed more accurately.
- FIG. 1 The structure of the tear string 13 of the optical fiber cable 1 will be explained with reference to FIGS. 3 to 6.
- FIG. 1 The structure of the tear string 13 of the optical fiber cable 1 will be explained with reference to FIGS. 3 to 6.
- FIGS. 3 to 5 show a cross section perpendicular to the longitudinal direction of the optical fiber cable 1, which includes two tensile members 12 and one tear string 13 positioned between the two tensile members 12. Only a portion of the cover 11 is shown. 15 is located outside of the common tangent drawn between adjacent tensile members 12 and is part of the outer tangent 17 . 3 to 5, the outer tangent line 17 is assumed to be the common tangent line 15 in order to explain using the tear cord 13 and the two tension members 12. As shown in FIG.
- the shape of the tear string 13 is arbitrary.
- the cross section may be circular as shown in FIG. 3 or rectangular as shown in FIG.
- the other part of the outer circumference may be in contact with the inner circumference of the outer cover 11 or positioned inside the inner circumference of the outer cover 11 .
- the tear string 13 may be composed of a plurality of strings, as shown in FIG.
- a portion of the outer circumference of at least one of the plurality of cords constituting the rip cord 13 is positioned outside the common tangent line 15, and at least a portion of the outer circumference of any one of the plurality of cords is located outside the outer cover 11. It may be arranged so as to be in contact with the inner circumference of the outer cover 11 or positioned inside the inner circumference of the outer cover 11 .
- the tear string 13 may have a structure in which a plurality of strings are twisted together.
- the tear string 13 may have a structure in which a plurality of strings are woven together.
- the ripping string 13 may be formed by adhering a plurality of strings. According to these structures, by taking out at least one of the plurality of ripping strings 13, the other ripping strings 13 can be taken out at the same time.
- FIG. 1 An example of a cross section along the longitudinal direction of the optical fiber cable 1 is shown in FIG.
- At least one string 13a is arranged in a straight line, and at least one string 13b is arranged in a straight line.
- the cord 13b is arranged in a wavy shape that repeatedly contacts and separates from the cord 13a”. ), the portion in contact with the linear string 13a is adhered or welded and is inside the outer tangent line 17, and the portion separated from the linear string 13a is outside the outer tangent line 17. It is desirable that a part of the outer circumference of the linear string 13a is in contact with the inner circumference of the outer cover 11 or inside the inner circumference of the outer cover 11 in all cross sections perpendicular to the longitudinal direction of the outer cover 11. . It is desirable that the wave-shaped cord 13b has a radial direction of the jacket 11 as an amplitude direction.
- the tearing string 13 composed of the linear string 13a and the wavy string 13b can be formed with two thin strings 13, and the wavy string 13b is arranged on the outer side of the outer cover 11 so that it can be easily pulled out. Therefore, it is not necessary to reduce the thickness of the jacket 11 at the portion where the tear string 13 is installed, and the strength of the optical fiber cable 1 can be maintained.
- the tearing string 13 composed of the linear string 13a and the wavy string 13b exposes a part of the wavy string 13b before the tensile strength member 12 when the outer cover 11 is cut out using a knife or the like. When the exposed corrugated cord 13b is pulled out, the bonded or welded linear cord 13a is pulled out at the same time, so that the jacket 11 is divided and the optical fiber 14 can be easily taken out.
- FIGS. 1 An example of the cross section of the optical fiber cable 1 according to the embodiment of the present invention is shown in FIGS.
- the jacket 11 may have a thinner jacket thickness at the portion where the rip cord 13 is installed than the jacket thickness at the portion where the rip cord 13 is not installed.
- the inner periphery of the outer cover 11 may be oval, and the tear string 13 may be arranged at the tip of the oval in the longitudinal direction.
- a protrusion may be provided on a portion of the inner circumference of the circle of the outer cover 11, and the tear string 13 may be arranged at the tip of the protrusion.
- a projection and a flat portion with a low curvature may be provided on the inner periphery of the outer cover 11, and the tear string 13 may be arranged at the tip of the projection.
- the shape of the outer circumference of the jacket 11 may be changed instead of the shape of the inner circumference of the jacket 11 .
- both the shape of the inner circumference of the jacket 11 and the shape of the outer circumference of the jacket 11 may be changed.
- the optical fiber 14 can be easily taken out without changing the shape of the tear string 13.
- the tear string 13 can be exposed prior to the tensile strength member 12 .
- optical fiber cable according to the present disclosure can be applied to the information and communication industry.
- Optical fiber cable 11 Jacket 12: Tensile member 13: Tear string 14: Optical fiber core wire 15: Common tangent 16: Adhesion 17: Outer tangent
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Insulated Conductors (AREA)
Abstract
Description
光ファイバ心線と、
前記光ファイバ心線を被覆する外被と、
前記外被の内部に、前記光ファイバ心線の長軸に沿って配置される3本以上の抗張力体と、
前記外被の長軸方向に垂直な一部の断面において、外周の一部が前記3本以上の抗張力体の外周の外側接線よりも外側にあり、前記外被の長軸方向に垂直な断面において、外周の一部が前記外被の内周に接し、又は前記外被の内周よりも内側にある切り裂き紐と、
を備える。
前記3本以上の抗張力体は、前記外側接線が前記外被の内周よりも外側にある。
前記切り裂き紐は、複数本の紐で構成されている。
前記切り裂き紐は、前記複数本の紐が互いに撚り合わされた構造である。
前記切り裂き紐は、前記複数本の紐が互いに編み込まれた構造である。
前記切り裂き紐は、前記複数本の紐が接着されている。
前記切り裂き紐は、少なくとも1本の紐は直線形状に配置され、少なくとも1本の紐は前記直線形状に配置された紐(以後、「直線形状紐」と略記)に接触と別離を繰り返す波形状に配置され、前記波形状に配置された紐は、前記直線形状紐と接触する部分が、接着又は溶着され、かつ、前記外側接線よりも内側にあり、前記直線形状紐と別離する部分が前記外側接線よりも外側にある。
前記外被は、前記切り裂き紐の設置された部分の外被厚が前記切り裂き紐の設置されていない部分の外被厚よりも薄い。
本発明の実施形態に係る光ファイバケーブルの長軸方向に垂直な断面の一例を図2に示す。1は光ファイバケーブル、11は外被、12は抗張力体、13は切り裂き紐、14は光ファイバ心線、17は外側接線である。
切り裂き紐13の外周の一部が、外被11の長軸方向に垂直な一部の断面だけで、外側接線17よりも外側にある場合、外被11の表面のうち、切り裂き紐13の外周の一部が外側接線17よりも外側にある断面の外被11の外周部分に目印を設けることで、より的確に切り裂き紐13を露出させることができる。
11:外被
12:抗張力体
13:切り裂き紐
14:光ファイバ心線
15:共通接線
16:接着部
17:外側接線
Claims (8)
- 光ファイバ心線と、
前記光ファイバ心線を被覆する外被と、
前記外被の内部に、前記光ファイバ心線の長軸に沿って配置される3本以上の抗張力体と、
前記外被の長軸方向に垂直な一部の断面において、外周の一部が前記3本以上の抗張力体の外周の外側接線よりも外側にあり、前記外被の長軸方向に垂直な断面において、外周の一部が前記外被の内周に接し、又は前記外被の内周よりも内側にある切り裂き紐と、
を備える光ファイバケーブル。 - 前記3本以上の抗張力体は、前記外側接線が前記外被の内周よりも外側にある
ことを特徴とする請求項1に記載の光ファイバケーブル。 - 前記切り裂き紐は、複数本の紐で構成されている
ことを特徴とする請求項1又は2に記載の光ファイバケーブル。 - 前記切り裂き紐は、前記複数本の紐が互いに撚り合わされた構造である
ことを特徴とする請求項3に記載の光ファイバケーブル。 - 前記切り裂き紐は、前記複数本の紐が互いに編み込まれた構造である
ことを特徴とする請求項3に記載の光ファイバケーブル。 - 前記切り裂き紐は、前記複数本の紐が接着されている
ことを特徴とする請求項3に記載の光ファイバケーブル。 - 前記切り裂き紐は、少なくとも1本の紐は直線形状に配置され、少なくとも1本の紐は前記直線形状に配置された紐(以後、「直線形状紐」と略記)に接触と別離を繰り返す波形状に配置され、前記波形状に配置された紐は、前記直線形状紐と接触する部分が、接着又は溶着され、かつ、前記外側接線よりも内側にあり、前記直線形状紐と別離する部分が前記外側接線よりも外側にある
ことを特徴とする請求項3に記載の光ファイバケーブル。 - 前記外被は、前記切り裂き紐の設置された部分の外被厚が前記切り裂き紐の設置されていない部分の外被厚よりも薄い
ことを特徴とする請求項1から7のいずれかに記載の光ファイバケーブル。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN202180099279.1A CN117480423A (zh) | 2021-06-18 | 2021-06-18 | 光缆 |
PCT/JP2021/023183 WO2022264400A1 (ja) | 2021-06-18 | 2021-06-18 | 光ファイバケーブル |
JP2023528912A JPWO2022264400A1 (ja) | 2021-06-18 | 2021-06-18 |
Applications Claiming Priority (1)
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PCT/JP2021/023183 WO2022264400A1 (ja) | 2021-06-18 | 2021-06-18 | 光ファイバケーブル |
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WO2022264400A1 true WO2022264400A1 (ja) | 2022-12-22 |
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PCT/JP2021/023183 WO2022264400A1 (ja) | 2021-06-18 | 2021-06-18 | 光ファイバケーブル |
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Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11185534A (ja) * | 1997-12-17 | 1999-07-09 | Sumitomo Electric Ind Ltd | リップコード入りケーブル |
US6798957B2 (en) * | 2001-08-25 | 2004-09-28 | Ccs Technology, Inc. | Optical fiber cable |
JP2004333886A (ja) * | 2003-05-08 | 2004-11-25 | Du Pont Toray Co Ltd | 光ファイバーケーブル用引き裂き紐 |
US20060127016A1 (en) * | 2004-12-15 | 2006-06-15 | Baird Paul R | Fiber optic cables with easy access features |
JP2007127886A (ja) * | 2005-11-04 | 2007-05-24 | Fujikura Ltd | 光ファイバケーブル |
JP2012108276A (ja) * | 2010-11-17 | 2012-06-07 | Furukawa Electric Co Ltd:The | 光ファイバケーブル、光ファイバケーブルの分岐方法 |
JP2014119635A (ja) * | 2012-12-18 | 2014-06-30 | Sumitomo Electric Ind Ltd | 光ケーブル |
EP2784788A1 (en) * | 2013-03-28 | 2014-10-01 | Alcatel-Lucent Shanghai Bell Co., Ltd. | Cable and method of manufacturing a cable |
JP2016080747A (ja) * | 2014-10-10 | 2016-05-16 | 住友電気工業株式会社 | 光ファイバケーブル |
-
2021
- 2021-06-18 WO PCT/JP2021/023183 patent/WO2022264400A1/ja active Application Filing
- 2021-06-18 CN CN202180099279.1A patent/CN117480423A/zh active Pending
- 2021-06-18 JP JP2023528912A patent/JPWO2022264400A1/ja active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11185534A (ja) * | 1997-12-17 | 1999-07-09 | Sumitomo Electric Ind Ltd | リップコード入りケーブル |
US6798957B2 (en) * | 2001-08-25 | 2004-09-28 | Ccs Technology, Inc. | Optical fiber cable |
JP2004333886A (ja) * | 2003-05-08 | 2004-11-25 | Du Pont Toray Co Ltd | 光ファイバーケーブル用引き裂き紐 |
US20060127016A1 (en) * | 2004-12-15 | 2006-06-15 | Baird Paul R | Fiber optic cables with easy access features |
JP2007127886A (ja) * | 2005-11-04 | 2007-05-24 | Fujikura Ltd | 光ファイバケーブル |
JP2012108276A (ja) * | 2010-11-17 | 2012-06-07 | Furukawa Electric Co Ltd:The | 光ファイバケーブル、光ファイバケーブルの分岐方法 |
JP2014119635A (ja) * | 2012-12-18 | 2014-06-30 | Sumitomo Electric Ind Ltd | 光ケーブル |
EP2784788A1 (en) * | 2013-03-28 | 2014-10-01 | Alcatel-Lucent Shanghai Bell Co., Ltd. | Cable and method of manufacturing a cable |
JP2016080747A (ja) * | 2014-10-10 | 2016-05-16 | 住友電気工業株式会社 | 光ファイバケーブル |
Also Published As
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JPWO2022264400A1 (ja) | 2022-12-22 |
CN117480423A (zh) | 2024-01-30 |
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