WO2011136274A1 - Câble à fibres optiques - Google Patents

Câble à fibres optiques Download PDF

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Publication number
WO2011136274A1
WO2011136274A1 PCT/JP2011/060272 JP2011060272W WO2011136274A1 WO 2011136274 A1 WO2011136274 A1 WO 2011136274A1 JP 2011060272 W JP2011060272 W JP 2011060272W WO 2011136274 A1 WO2011136274 A1 WO 2011136274A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
cable
slot
axis
longitudinal direction
Prior art date
Application number
PCT/JP2011/060272
Other languages
English (en)
Japanese (ja)
Inventor
広二 齋藤
直樹 岡田
正義 山中
佳夫 橋本
Original Assignee
株式会社フジクラ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社フジクラ filed Critical 株式会社フジクラ
Publication of WO2011136274A1 publication Critical patent/WO2011136274A1/fr

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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
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/4434—Central member to take up tensile loads
    • 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
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G02B6/4432—Protective covering with fibre reinforcements
    • G02B6/4433—Double reinforcement laying in straight line with optical transmission element

Definitions

  • the present invention includes an optical fiber communication line (the optical fiber communication line is a concept including an optical fiber core wire, a drop type optical fiber cable, an indoor type optical fiber cable, and the like).
  • the present invention relates to an optical fiber cable including a slot core and a sheath covering the periphery of the slot core.
  • Patent Document 1 discloses a slot core having a slot groove for accommodating an optical fiber therein, a sheath covering the periphery of the slot core, and a tensile body embedded in the slot core along the longitudinal direction of the cable.
  • An optical fiber cable is described.
  • the slot core is formed in a C-shaped cross section with one slot groove, and a tensile body is disposed inside the thick portion of the slot core.
  • the thickness of the sheath is set to be thicker on the opening side of the slot groove, and is set to be thinner on the side opposite to the opening.
  • FIG. 10 shows a structure of a conventional optical fiber cable similar to that described in Patent Document 1.
  • the optical fiber cable 110 includes a slot core 111 having a single slot groove 112 for accommodating a plurality of optical fibers 113 therein, and a sheath provided by extrusion afterward so as to cover the periphery of the slot core 111.
  • the two strength members 115 are arranged side by side on an axis passing through the center of the cable (the center of the cross section perpendicular to the longitudinal direction of the cable) and the center of the opening 116 of the slot groove 112 in the width direction.
  • the thickness of the sheath 114 is set to be thicker on the opening 116 side of the slot groove 112 and is set to be thinner on the side opposite to the opening 116. That is, the thick portion 114 a of the sheath 114 is disposed on the opening 116 side of the slot groove 112, and the thin portion 114 b is disposed on the opposite side of the opening 116 of the slot groove 112.
  • the opening 116 of the slot groove 112 of the slot core 111 is a pressing tape 117 such as a PET tape that prevents the molten resin constituting the sheath 114 from entering the slot groove 112 when the sheath 114 is extruded. Covered.
  • the above-described conventional optical fiber cable 110 has only one slot groove 112, and therefore, from among a plurality of optical fibers 113 housed in the same slot groove 112 for intermediate rear branching.
  • a specific optical fiber 113 is taken out, there is a high possibility that another optical fiber 113 that does not need to be taken out is taken out together or accidentally taken out. There is a possibility that the fiber 113 is excessively affected such as over tension.
  • the optical fiber core wires can be distinguished from each other by color coding such as blue, yellow, green, red, purple, and white.
  • color coding such as blue, yellow, green, red, purple, and white.
  • the present invention is an optical device capable of improving the discrimination when a specific optical fiber (optical fiber communication line) is taken out from a plurality of optical fibers (optical fiber communication lines) housed in the cable.
  • An object is to provide a fiber cable.
  • a slot core having a slot groove for accommodating an optical fiber communication line therein, a sheath covering the periphery of the slot core, and the slot core along the longitudinal direction of the cable.
  • an optical fiber cable provided with an embedded tensile strength body
  • one of the Y axes is a cable bending neutral
  • the two tension members are arranged in parallel to each other at a position on the Y axis inside the slot core and near the center of the cable so as to form a line, and both the slot grooves are arranged on the Y axis.
  • Two of the two slots are arranged at the upper position and at 180 degrees opposite to each other with the cable center in between, and these two slot grooves are located closer to the cable center than the tensile body.
  • a slot core having a slot groove for accommodating an optical fiber communication line therein, a sheath covering the periphery of the slot core, and the slot core along the longitudinal direction of the cable.
  • an optical fiber cable provided with an embedded tensile strength body
  • one of the Y axes is a cable bending neutral
  • the strip-shaped tension member is in a position in which the longitudinal direction of the cross section coincides with the Y axis at a position on the Y axis inside the slot core and close to the center of the cable so as to be a line.
  • One slot groove is disposed at two positions on the Y axis and opposite each other at 180 degrees across the center of the cable.
  • a straight groove extending in a straight line along the longitudinal direction of the cable is formed at a position farther from the cable center than the tensile strength member, and one slot groove and the other slot groove of these two slot grooves. Further, each of the optical fiber communication lines is housed.
  • the optical fiber cable of the present invention has two slot grooves, for example, if different types of optical fiber communication lines are accommodated in each slot groove, the type of the optical fiber communication line is identified for each slot groove. This makes it possible to improve the distinguishability and to easily take out the required optical fiber communication line.
  • a composite cable can be easily created by storing optical fiber communication lines having different structures in respective slot grooves.
  • the cable bending direction can be limitedly controlled so that the Y axis becomes a cable bending neutral line.
  • a problem distortion compression distortion
  • the tensile body is disposed closer to the center of the cable than the slot groove that stores the optical fiber communication line, the tensile body does not get in the way when the sheath is removed or the optical fiber communication line is taken out. Therefore, removal of the sheath and removal of the optical fiber communication line can be facilitated.
  • the optical fiber communication lines stored in the two slot grooves may be the same type or different types.
  • the difference in the color and the structure (type) of the optical fiber communication line is defined as a concept included in the difference in the type of the optical fiber communication line.
  • FIG. 1 is a transverse sectional view perpendicular to the longitudinal direction of the optical fiber cable according to the first embodiment of the present invention.
  • This optical fiber cable 10A includes a slot core 11 having two slot grooves 12a and 12b having an opening 16 on the outer peripheral surface, a sheath 14 covering the periphery of the slot core 11, and a cable inside the slot core 11.
  • Tensile body 15 composed of two filaments having a circular cross section embedded along the longitudinal direction, and two optical fiber cores of blue and red having different colors housed in the slot grooves 12 and 12b. (Optical fiber communication line).
  • the opening 16 of the slot groove 12 of the slot core 11 is covered with a pressing tape 17 such as a PET tape for preventing the molten resin constituting the sheath 14 from entering the slot groove 12 when the sheath 14 is extruded. ing.
  • the two strength members 15 are:
  • the X axis direction is the bending direction M
  • the Y axis is the neutral line of the cable bending direction M, so that they are spaced apart and parallel to each other on the Y axis inside the slot core 11 and close to the cable center O.
  • the two strength members 15 are arranged side by side.
  • the two strength members 15 are arranged at positions symmetrical with respect to the cable center O.
  • the two slot grooves 12a and 12b are both disposed on the Y axis and at positions facing each other by 180 degrees across the cable center O, and the width direction of the opening 16 of each slot groove 12a and 12b is set.
  • the center is located on the Y axis.
  • These two slot grooves 12 a and 12 b are disposed at positions farther from the cable center O than the two strength members 15.
  • the two slot grooves 12a and 12b are formed as straight grooves extending linearly along the cable longitudinal direction.
  • Each of the slot grooves 12 a and 12 b has a substantially semicircular cross section, and a portion corresponding to a semicircular chord is opened as an opening 16 on the outer peripheral surface of the slot core 11.
  • One of the two slot grooves 12a and 12b contains one blue optical fiber core wire 13a, and the other slot groove 12b contains, for example, one red fiber groove.
  • the optical fiber core wire 13b is accommodated.
  • the color combinations of the optical fiber cores 13a and 13b stored in the slot grooves 12a and 12b are arbitrary, and the colors of the optical fiber cores 13a and 13b stored in the slot grooves 12a and 12b are different from each other. That's fine.
  • the sheath 14 is peeled off by a predetermined area to open the openings 16 of the slot grooves 12a and 12b, and the necessary optical fiber cores 13a and 12b in the slot grooves 12a and 12b are opened. Remove only 13b.
  • the type of the optical fiber cores 13a and 13b is identified for each of the slot grooves 12a and 12b. Can be easily identified, and only the necessary optical fiber core wires 13a and 13b can be taken out without difficulty. Therefore, the optical fiber core wires 13a and 13b, which do not need to be taken out, are not adversely affected.
  • the outer surface of the sheath 14 facing the slot grooves 12a and 12b is different from the outside of the optical fiber cable 10A so that it can be seen which optical fiber core wires 13a and 13b are accommodated in which slot grooves 12a and 12b. It is desirable to provide a marker (provided in the longitudinal direction of the cable using a line of a different color as a mark). The point that it is desirable to provide a marker for identification is the same in the following embodiments.
  • the cable bending direction is set so that the Y axis becomes a cable bending neutral line. Limited control will be possible. As a result, it is possible to make it difficult for the optical fiber core wires 13a and 13b to be subjected to problematic strains (compression strain and elongation strain) when the cable is bent, and it is possible to ensure transmission characteristics. Further, since the bending direction is limited, the optical fiber cable 10A can be wound around a drum.
  • the two strength members 15 are disposed closer to the cable center O than the slot grooves 12a and 12b in which the optical fiber cores 13a and 13b are accommodated, the sheath 14 is removed or the optical fiber core wire is removed. At the time of taking out 13a and 13b, the tension member 15 does not get in the way, so that the sheath 14 can be removed and the optical fiber core wires 13a and 13b can be taken out easily.
  • FIG. 2 is a cross-sectional view perpendicular to the longitudinal direction of the optical fiber cable according to the second embodiment of the present invention.
  • this optical fiber cable 10B three optical fiber cores 13a, 13b, 13c and 13d, 13e, 13f are accommodated in the two slot grooves 12a, 12b, respectively.
  • One slot groove 12a accommodates three optical fiber core wires 13a, 13b, and 13c of blue, yellow, and green
  • the other slot groove 12b includes three optical fiber cores of red, purple, and white. Lines 13d, 13e, and 13f are accommodated. Since the other configuration is the same as that of the optical fiber cable 10A of the first embodiment shown in FIG. 1, the same components are denoted by the same reference numerals and description thereof is omitted.
  • optical fiber core wires 13a to 13f having different color combinations are accommodated in the two slot grooves 12a and 12b, the optical fiber core wires 13a to 13f are respectively provided to the slot grooves 12a and 12b. It is possible to identify the type of 13f (color distinction), it is easy to identify, and only necessary optical fiber core wires 13a to 13f can be taken out without difficulty. Accordingly, the optical fiber core wires 13a to 13f that do not need to be taken out are not affected excessively. Other functions and effects are the same as those of the first embodiment.
  • FIG. 3 is a transverse sectional view perpendicular to the longitudinal direction of the optical fiber cable according to the third embodiment of the present invention.
  • optical fibers having different types of structures are accommodated in the two slot grooves 12a and 12b, respectively.
  • a plurality of optical fiber ribbons 13g (optical fiber communication lines) are accommodated in one slot groove 12a, and a drop-type optical fiber cable 13h (optical fiber communication line) is accommodated in the other slot groove 12b. ing. Since the other configuration is the same as that of the optical fiber cable 10A of the first embodiment shown in FIG. 1, the same components are denoted by the same reference numerals and description thereof is omitted.
  • the two slot grooves 12a and 12b accommodate different types of optical fiber communication lines (optical fiber ribbon 13g and drop type optical fiber cable 13h). It is possible to identify the type of the optical fiber communication line for each of 12a and 12b, it becomes easy to identify, and only the necessary optical fiber communication line (the optical fiber ribbon 13g or the drop type optical fiber cable 13h) is taken out without difficulty. Will be able to. Therefore, the optical fiber communication line that does not need to be taken out is not adversely affected.
  • optical fiber communication lines having different structures are stored separately in the slot grooves 12a and 12b, a composite cable can be easily formed.
  • Other functions and effects are the same as those of the first embodiment.
  • FIG. 4 is a transverse sectional view perpendicular to the longitudinal direction of the optical fiber cable according to the fourth embodiment of the present invention.
  • This optical fiber cable 10D is provided with a single strip-shaped tensile body 25 instead of the two tensile bodies 15 of the optical fiber cable 10C of the third embodiment.
  • the tension member 25 is disposed at the cable center O in a posture in which the longitudinal direction of the cross section coincides with the Y axis so that the Y axis becomes a neutral line of the cable bending direction M.
  • the belt-like strength member 25 is disposed at the cable center O in a posture in which the longitudinal direction of the cross section coincides with the Y axis, so that one strength member 25 is used.
  • the cable bending direction M can be limited to the X-axis direction. Other functions and effects are the same as those of the third embodiment.
  • FIG. 5 is a transverse sectional view perpendicular to the longitudinal direction of the optical fiber cable according to the fifth embodiment of the present invention.
  • This optical fiber cable 10E is obtained by replacing the drop-type optical fiber cable 13h housed in one slot groove 12b of the optical fiber cable 10C of the third embodiment with an indoor-type optical fiber cable 13m.
  • the effect of the optical fiber cable 10E is the same as that of the third embodiment.
  • FIG. 6 is a cross-sectional view perpendicular to the longitudinal direction of the optical fiber cable shown as the first comparative example.
  • This optical fiber cable 10P corresponds to a modification of the conventional optical fiber cable 110 shown in FIG. 9, and the slot core 11 is provided with only one slot groove 12. And in this one slot groove
  • optical fiber cable 10P since the optical fiber tape core wire 13g and the indoor type optical fiber cable 13m are accommodated in one slot groove 12, when the optical fiber tape core wire 13g is taken out, the indoor type optical fiber cable 13g is taken together.
  • the optical fiber cable 13m may be pulled out.
  • the rigidity and expansion / contraction rate should be different for each type of optical fiber communication line, it is impossible to store them together in one slot groove 12, and it is actually difficult to combine in this form. I must say.
  • FIG. 7 is a cross-sectional view perpendicular to the cable longitudinal direction of an optical fiber cable shown as a second comparative example.
  • This optical fiber cable 10Q is a comparative example for the optical fiber cable 10E of the fifth embodiment shown in FIG.
  • the slot core 11 is provided with two slot grooves 12a and 12b, the slot grooves 12a and 12b are arranged in the direction in which the two strength members 15 are arranged, that is, the cable bending center line Y It is on the X axis, not on the axis.
  • the slot grooves 12a and 12b accommodate an optical fiber ribbon 13g and an indoor optical fiber cable 13m.
  • the cable bending direction M is limited to the X-axis direction due to the arrangement of the two strength members 15, so that the optical fiber communication line positioned outward from the cable bending center when the cable is bent.
  • the optical fiber communication line located on the inner side with respect to the cable bending center is more easily compressed. Therefore, the optical fiber communication line located inside is likely to receive a lot of compressive strain, and there is a possibility that transmission characteristics may not be ensured.
  • FIG. 8 is a cross-sectional view perpendicular to the cable longitudinal direction of an optical fiber cable shown as a third comparative example.
  • This optical fiber cable 10R is a comparative example for the optical fiber cable 10E of the fifth embodiment shown in FIG.
  • the two strength members 15 are not arranged at the center of the cross section of the slot core 11 as in the optical fiber cable 10E of FIG. 5, but on the outside in the cable radial direction of the slot grooves 12a and 12b. It is embedded in the sheath 14.
  • optical fiber communication line optical fiber
  • the strength member 15 becomes an obstacle, and it becomes difficult to take out the optical fiber communication line.
  • the optical fiber cable according to the embodiment of the present invention has the strength members 15 and 25 arranged so that the Y-axis is a cable bending neutral line, and is outside the strength member on the Y-axis. It is necessary that the two slot grooves 12a and 12b are disposed at positions that face the cable center O at 180 degrees, and that different types of optical fiber communication lines are accommodated in the respective slot grooves 12a and 12b. As a necessary condition, the following effects can be achieved while avoiding problems in the comparative example.
  • the bending direction of the cable can be limited, and transmission characteristics can be secured when the cable is bent.
  • FIG. 9 is a cross-sectional view perpendicular to the longitudinal direction of the optical fiber cable according to the sixth embodiment of the present invention.
  • This optical fiber cable 10F is an optical fiber cable in which the slot core 11 and the sheath 14 are both rectangular, unlike the first to fifth embodiments.
  • the same components as those of the optical fiber cable having the circular cross section of the first to fifth embodiments are denoted by the same reference numerals, and the description thereof is omitted.
  • the two strength members 15 are arranged in parallel and spaced apart from each other at a position on the Y axis of the rectangular slot core 11 and close to the cable center O. It is arranged.
  • the two slot grooves 12a and 12b are both arranged on the Y-axis and at positions facing each other by 180 degrees with the cable center O in between, and the width direction of the opening 16 of each slot groove 12a and 12b is set.
  • the center is located on the Y axis.
  • These two slot grooves 12 a and 12 b are disposed at positions farther from the cable center O than the two strength members 15.
  • the two slot grooves 12a and 12b are formed as straight grooves extending linearly along the cable longitudinal direction.
  • a pressing tape 17 is provided between the slot core 11 and the sheath 14 so as to cover the entire slot core 11 so that the molten resin constituting the sheath 14 does not enter the slot grooves 12a and 12b. Yes.
  • the sheath 14 is provided with a notch 18 formed in a V-groove for facilitating the tearing of a partial region of the sheath 14 when the middle branch is made.
  • the notch 18 is provided at one place on the X axis on the left and right sides, and is formed continuously in the cable longitudinal direction.
  • optical fiber cable 10F four optical fiber core wires 13a, 13b, 13c, 13d and 13e, 13f, 13g, 13h are accommodated in the two slot grooves 12a, 12b, respectively.
  • One slot groove 12a accommodates four optical fiber core wires 13a, 13b, 13c and 13d of blue, yellow, green and red, and the other slot groove 12b contains brown, purple, white and gray.
  • Four optical fiber core wires 13e, 13f, 13g, and 13h are accommodated.
  • the optical fiber core wires 13a to 13h having different color combinations are accommodated in the two slot grooves 12a and 12b, respectively. It is possible to identify the type of 13h (color distinction), it becomes easy to identify, and only the necessary optical fiber core wires 13a to 13h can be taken out without difficulty. Accordingly, the optical fiber core wires 13a to 13h that do not need to be taken out are not adversely affected.
  • optical fibers having different types of structures are accommodated in the two slot grooves 12a and 12b, respectively. Also good.
  • the present invention can be used for an optical fiber cable suitable for taking out an optical fiber housed in a slot core by cutting a sheath.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

La présente invention se rapporte à un câble à fibres optiques qui comprend : un noyau à fente (11) avec deux rainures à fente (12a, 12b) pratiquées à l'intérieur pour recevoir des cœurs de fibres optiques (lignes de communication à fibres optiques) (13a, 13b) ; une gaine (14) conçue pour recouvrir la périphérie du noyau à fente ; et deux composants résistants à la traction (15) incorporés dans ledit noyau à fente. Les deux composants résistants à la traction (15) se trouvent sur l'axe Y qui traverse le centre du câble (O), et les rainures à fente (12a, 12b) se situent sur l'axe Y de manière à être placées de part et d'autre des composants résistants à la traction (15). Les deux rainures à fente ont la forme d'une rainure droite qui s'étend en ligne droite dans le sens de la longueur du câble. La rainure à fente (12a) et la rainure à fente (12b) reçoivent respectivement, par exemple, les cœurs de fibres optiques (13a, 13b) de différentes couleurs.
PCT/JP2011/060272 2010-04-28 2011-04-27 Câble à fibres optiques WO2011136274A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2010103773 2010-04-28
JP2010-103773 2010-04-28
JP2011099250A JP5802047B2 (ja) 2010-04-28 2011-04-27 光ファイバケーブル
JP2011-099250 2011-04-27

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WO2011136274A1 true WO2011136274A1 (fr) 2011-11-03

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JP (1) JP5802047B2 (fr)
TW (1) TW201222046A (fr)
WO (1) WO2011136274A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104080905A (zh) * 2011-12-22 2014-10-01 生命技术公司 细胞培养基和方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08160265A (ja) * 1994-11-30 1996-06-21 Fujikura Ltd 光ファイバケーブル
JPH08184733A (ja) * 1994-12-29 1996-07-16 Fujikura Ltd Ｓｐ型光ケーブル
JPH0943464A (ja) * 1995-08-02 1997-02-14 Fujikura Ltd Ｈグルーブ型光ファイバケーブル
JP2004240061A (ja) * 2003-02-04 2004-08-26 Furukawa Electric Co Ltd:The 光ファイバケーブル
JP2005049658A (ja) * 2003-07-29 2005-02-24 Furukawa Electric Co Ltd:The 光ファイバケーブル
JP2005157159A (ja) * 2003-11-28 2005-06-16 Ube Nitto Kasei Co Ltd ドロップ光ケーブル用ｆｒｐの製造方法及び同ｆｆｒｐを用いたドロップ光ファイバケーブル
JP2008076897A (ja) * 2006-09-22 2008-04-03 Fujikura Ltd 光ファイバケーブル

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08160265A (ja) * 1994-11-30 1996-06-21 Fujikura Ltd 光ファイバケーブル
JPH08184733A (ja) * 1994-12-29 1996-07-16 Fujikura Ltd Ｓｐ型光ケーブル
JPH0943464A (ja) * 1995-08-02 1997-02-14 Fujikura Ltd Ｈグルーブ型光ファイバケーブル
JP2004240061A (ja) * 2003-02-04 2004-08-26 Furukawa Electric Co Ltd:The 光ファイバケーブル
JP2005049658A (ja) * 2003-07-29 2005-02-24 Furukawa Electric Co Ltd:The 光ファイバケーブル
JP2005157159A (ja) * 2003-11-28 2005-06-16 Ube Nitto Kasei Co Ltd ドロップ光ケーブル用ｆｒｐの製造方法及び同ｆｆｒｐを用いたドロップ光ファイバケーブル
JP2008076897A (ja) * 2006-09-22 2008-04-03 Fujikura Ltd 光ファイバケーブル

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104080905A (zh) * 2011-12-22 2014-10-01 生命技术公司 细胞培养基和方法

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TW201222046A (en) 2012-06-01
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