JP3710672B2 - Feed line composite type single core drop optical fiber cable and manufacturing method thereof - Google Patents

Feed line composite type single core drop optical fiber cable and manufacturing method thereof Download PDF

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Publication number
JP3710672B2
JP3710672B2 JP2000073151A JP2000073151A JP3710672B2 JP 3710672 B2 JP3710672 B2 JP 3710672B2 JP 2000073151 A JP2000073151 A JP 2000073151A JP 2000073151 A JP2000073151 A JP 2000073151A JP 3710672 B2 JP3710672 B2 JP 3710672B2
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Japan
Prior art keywords
optical fiber
line
wire
support
composite type
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JP2000073151A
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JP2001266663A (en
Inventor
和永 小林
佳夫 橋本
雅広 草刈
末広 宮本
公夫 安藤
泰司 村上
雅義 山野
義照 武田
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THE FURUKAW ELECTRIC CO., LTD.
Fujikura Ltd
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
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THE FURUKAW ELECTRIC CO., LTD.
Fujikura Ltd
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
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【０００１】
【発明の属する技術分野】
本発明は、集合住宅、ビルなどの加入者系への光配線に用いられる給電線複合型単心ドロップ光ファイバケーブル（以下、給電線複合型単心ドロップケーブルという。）に関する。
【０００２】
【従来の技術】
従来、ネットワークシステムにおいては、図２に示すように個別住宅の加入者端末２ｂへの光信号は、まず、通信設備センター１から、電柱等に設置されているＯＮＵ４ｂまで、光ケーブルを通して送信される。そして、このＯＮＵ４ｂにおいて、通信設備センター１から送られた光信号は電気信号に変換された後、各戸の加入者端末２ｂに引込みメタル線５ｂを通して送信されている。
この場合ＯＮＵ４ｂにおいては、光信号を電気信号に変換するための電力を必要とする。よって、最近では、通信設備センター１からＯＮＵ４ｂへの配線には、給電線を備えた図３に示すような複合型ドロップケーブル３０が使用されている。
この複合型ドロップケーブル３０は、鋼線３１を数本撚り合わせた裸テンションメンバの周上にポリエチレン被覆３３が設けられ、さらにその周上に、光ファイバ３４とテンションメンバ３２を有する光エレメント３５と、給電線３６を有する給電部３７が撚り合わせて集合された構造になっている。
【０００３】
一方、図２に示すように、集合住宅６やビル等の各加入端末２ａへの光信号は、これらの建物の壁面等に設置されたＯＮＵ４ａへと送られた後、このＯＮＵ４ａから引込みメタル線５ａを通して各加入者端末２ａへと送信されている。よって、複合型ドロップケーブル３０から、集合住宅６に設けられているＯＮＵ４ａへと光信号を送信するためには、給電線複合型の単心ドロップケーブル４０が必要となっている。
この給電線複合型単心ドロップケーブル４０としては、図４に示すように、光ファイバ４１とテンションメンバ４２が被覆された光エレメント４３と、この光エレメント部４３を支持する支持線４４が被覆された支持線部４６と、給電線４５が被覆された給電部４７が複合化された形態が例示できる。
【０００４】
【発明が解決しようとする課題】
しかしながら、このような形態では、光エレメント部と、支持線と、給電線とを複合化するためには、これらを個別に製造する３つの押出工程と、その後、これらを一体化する集合工程の合計４工程が必要となり、生産コストが高いという問題がある。また、得られた給電線複合型単心ドロップケーブルを使用する場合には、支持線を分離し、さらに給電線と光エレメントとを個別に接続する必要があるため、これらの分離作業が容易である必要があるが、従来例では、まず、支持線から光エレメント部を分離させてから光エレメント部から光ファイバを引き出す必要があり、さらに、支持線から給電部を分離させてから２本の給電線を取り出す必要があり、工程が煩雑であった。
【０００５】
本発明は前記事情に鑑みてなされたもので、光エレメント部と、支持線と、給電線とが一体化されていてケーブル敷設が簡便であるとともに、分離作業が少ない工程で容易に行える給電線複合型単心ドロップケーブルを低コストで提供することを課題とする。
【０００６】
【課題を解決するための手段】
本発明の給電線複合型単心ドロップケーブルは、１本の光ファイバ心線とこの光ファイバ心線を中心に挟んで配された２本のテンションメンバを有する光エレメント部と、この光エレメント部を支持する支持線を有する支持線部と、給電線を有する給電線部からなり、１本の光ファイバ心線と、２本のテンションメンバと、支持線と、給電線は、これらの断面の中心が同一直線上に存在するように配されていて、これらの周上にはシースで一体化されていることを特徴とする。
光エレメント部と支持線部と給電線部の各部の境界部分のシースには、ブリッジ部が形成され、光エレメント部のシースの光ファイバ心線近傍には、引き裂き用の切り欠き部が形成されていることが好ましい。
本発明の給電線複合型単心ドロップケーブルの製造方法は、１本の光ファイバ心線に、２本のテンションメンバをこれらが光ファイバ心線に対して対称位置となるように縦添えし、ついで、支持線と給電線とを、光ファイバ心線と、テンションメンバと、支持線と、給電線の断面円の中心が同一直線上に存在するように配し、ついで、これらを樹脂で一体化することを特徴とする。
【０００７】
【発明の実施の形態】
以下、本発明を詳しく説明する。
図１は、本発明の給電線複合型単心ドロップケーブル１０の断面図である。この給電線複合型単心ドロップケーブル１０は、光エレメント部１３と、支持線部１５と、給電線部１７から構成されている。
光エレメント部１３は、１本の光ファイバ心線１１と、この光ファイバ心線を中心に挟んで配された２本のテンションメンバ１２を有する。
光ファイバ心線１１としては、光ファイバ素線上に樹脂被覆が設けられた外径２５０μｍの単心心線が使用される。
テンションメンバ１２としては、通常０．２〜０．７ｍｍ程度の外径の鋼線の他、この鋼線に銅や亜鉛のめっきが施されためっき鋼線、合金鋼線等が使用される。
【０００８】
支持線部１５は、１〜２ｍｍ程度の外径の鋼線、めっき鋼線、合金鋼線等からなる支持線１４を有し、この支持線によって、給電線複合型単心ドロップケーブル１０が電柱間に架設されるようになっている。
給電部１７は、１〜２ｍｍ程度の外径の軟銅線等からなる給電線１６を有し、この給電線１６を通して電力が供給されるようになっている。
そして、光エレメント部１３と、支持線部１５と、給電線部１７は、ポリエチレン等の熱可塑性樹脂等からなるシース１８で一体化されていて、これらの断面形状は、支持線部１５は円形で、光エレメント部１３および給電線部１７は、矩形になっている。
【０００９】
この給電線複合型単心ドロップケーブル１０においては、１本の光ファイバ心線１１と、２本のテンションメンバ１２と、支持線１４と、給電線１６は、これらの断面の中心が同一直線Ｌ1 上に存在するように配されている。
また、光エレメント部１３において、シース１８の光ファイバ心線１１が位置する部分の両端部には、引き裂き用のくさび状の切り欠き部１８ａが形成されている。そして、光エレメント部１３と支持線部１５との間、光エレメント部１３と給電線部１７との間には、それぞれブリッジ部１８ｂが形成されていて、これら各部の分離を容易に行えるようになっている。
【００１０】
この給電線複合型単心ドロップケーブル１０の寸法には特に制限はないが、光エレメント部１３は、長径Ｄ1 が３．０ｍｍ、短径Ｄ2 が１．６ｍｍ、テンションメンバ１２の外径は０．４ｍｍである。
給電部１７は長径Ｄ3 が４．８ｍｍ、短径Ｄ4 が２．４ｍｍで、給電線１６の外径は通常１．２ｍｍである。
また、支持部１５は通常、外径Ｄ5 が２．４ｍｍ、支持線１４の外径が１．２ｍｍで、支持部１５におけるシース１８の厚さは０．６ｍｍである。そして、この給電線複合型単心ドロップケーブル１０の全体の長さＤ6 は１０．８ｍｍである。
【００１１】
この給電線複合型単心ドロップケーブル１０は、例えば、次にようにして製造できる。まず、光ファイバ素線を、紫外線硬化型樹脂が供給されたポットに通し、光ファイバ素線にこれを塗布する。ついで、塗布された紫外線硬化型樹脂を、架橋筒で紫外線照射により硬化し、光ファイバ心線１１とする。
そして、得られた光ファイバ心線１１に、２本のテンションメンバ１２をこれらが光ファイバ心線１１に対して対称位置となるように縦添えし、ついで、支持線１４と給電線１６とを、光ファイバ心線１１と、テンションメンバ１２と、支持線１４と、給電線１６の断面円の中心が同一直線上に存在するように配する。そして、これらを、押出機のクロスヘッドダイに通し、ポリエチレン等の溶融樹脂を押出被覆して、シース１８で一体化することによって給電線複合型単心ドロップケーブル１０を得る。
【００１２】
このような給電線複合型単心ドロップケーブル１０は、光ファイバ心線１１と、２本のテンションメンバ１２と、支持線１４と、給電線１６とを、シース１８で一体化することによって得られるため、少ない工程、低コストで製造できる。また、この給電線複合型単心ドロップケーブル１０は、光ファイバ心線１１と、２本のテンションメンバ１２と、支持線１４と、給電線１６とが、これらの断面円の中心が同一直線上に存在するように配されているため、従来例のものに比べて、分離作業が容易に行え、かつ、敷設も簡便に行うことができる。
さらに、光エレメント部１３と支持線部１５と給電線部１７の各部の境界部分のシース１８には、ブリッジ部１８ｂを形成し、光エレメント部１３のシース１８の光ファイバ心線１１近傍には、引き裂き用の切り欠き部１８ａを形成することにより、分離作業をより一層容易に行うことができる。
また、図示例では、支持線部１５、光エレメント部１３、給電線部１７の順序で一体化されているが、この順序には制限はなく、任意の順序で配列することができる。
【００１３】
【発明の効果】
以上説明したように本発明の給電線複合型単心ドロップケーブルは、低コストで生産できる上に、敷設作業、分離作業を容易に行うことができる。したがって、集合住宅やビル等に設置されたＯＮＵへの配線に特に適している。
【図面の簡単な説明】
【図１】 本発明の給電線複合型単心ドロップ光ファイバケーブルの一形態を示す断面図である。
【図２】 ネットワークシステムを説明する説明図である。
【図３】 複合型ドロップケーブルの断面図である。
【図４】 従来の給電線複合型単心ドロップ光ファイバケーブルの一形態を示す断面図である。
【符号の説明】
１０…給電線複合型単心ドロップ光ファイバケーブル、１１…光ファイバ心線、１２…テンションメンバ、１３…光エレメント部、１４…支持線、１５…支持線部、１６…給電線、１７…給電線部、１８…シース、１８ａ…切り欠き部、１８ｂ…ブリッジ部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a feed line composite type single core drop optical fiber cable (hereinafter referred to as a feed line composite type single core drop cable) used for optical wiring to a subscriber system such as an apartment house or a building.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a network system, as shown in FIG. 2, an optical signal to a subscriber terminal 2b in an individual house is first transmitted through an optical cable from the communication equipment center 1 to an ONU 4b installed on a utility pole or the like. In this ONU 4b, the optical signal sent from the communication facility center 1 is converted into an electric signal, and then transmitted to the subscriber terminal 2b of each house through the lead-in metal line 5b.
In this case, the ONU 4b requires power for converting an optical signal into an electrical signal. Therefore, recently, for the wiring from the communication equipment center 1 to the ONU 4b, a composite drop cable 30 as shown in FIG.
This composite drop cable 30 is provided with a polyethylene coating 33 on the circumference of a bare tension member in which several steel wires 31 are twisted, and on the circumference, an optical element 35 having an optical fiber 34 and a tension member 32. The power feeding part 37 having the power feeding line 36 is assembled by twisting.
[0003]
On the other hand, as shown in FIG. 2, the optical signal to each subscribing terminal 2a such as an apartment house 6 or a building is sent to the ONU 4a installed on the wall surface of these buildings, and then drawn from the ONU 4a. It is transmitted to each subscriber terminal 2a through 5a. Therefore, in order to transmit an optical signal from the composite drop cable 30 to the ONU 4 a provided in the apartment house 6, the feed line composite single-core drop cable 40 is required.
As shown in FIG. 4, the feeder single-core drop cable 40 is coated with an optical element 43 covered with an optical fiber 41 and a tension member 42 and a support wire 44 that supports the optical element portion 43. The support line part 46 and the power feeding part 47 covered with the power feeding line 45 can be combined.
[0004]
[Problems to be solved by the invention]
However, in such a form, in order to combine the optical element portion, the support line, and the power supply line, three extrusion processes for individually manufacturing them, and then an assembly process for integrating them. There is a problem that a total of four steps are required and the production cost is high. In addition, when using the obtained feed line composite type single-core drop cable, it is necessary to separate the support line and connect the feed line and the optical element individually, so that the separation work is easy. In the conventional example, it is necessary to first separate the optical element portion from the support wire and then to pull out the optical fiber from the optical element portion. It was necessary to take out the power supply line, and the process was complicated.
[0005]
The present invention has been made in view of the above circumstances, and the power element line, the support line, and the power supply line are integrated, the cable laying is simple, and the power supply line can be easily performed in a process with few separation operations. It is an object to provide a composite single-core drop cable at a low cost.
[0006]
[Means for Solving the Problems]
The feed line composite type single-core drop cable of the present invention includes an optical element portion having one optical fiber core wire and two tension members arranged around the optical fiber core wire, and the optical element portion. A support line part having a support line for supporting the power supply line, and a power supply line part having a power supply line. One optical fiber core wire, two tension members, a support line, and a power supply line The centers are arranged so as to exist on the same straight line, and the circumference is integrated by a sheath.
A bridge portion is formed in the sheath at the boundary portion between the optical element portion, the support wire portion, and the feeder line portion, and a tearing notch portion is formed in the vicinity of the optical fiber core wire of the sheath of the optical element portion. It is preferable.
In the manufacturing method of the feed line composite type single core drop cable of the present invention, two tension members are vertically attached to one optical fiber core wire so that they are symmetrical with respect to the optical fiber core wire, Next, the support line and the feed line are arranged so that the center of the cross-section circle of the optical fiber core wire, the tension member, the support line, and the feed line exists on the same straight line, and then these are integrated with resin. It is characterized by becoming.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below.
FIG. 1 is a cross-sectional view of a feeder line composite type single core drop cable 10 of the present invention. The feed line composite single-core drop cable 10 includes an optical element part 13, a support line part 15, and a feed line part 17.
The optical element portion 13 has one optical fiber core wire 11 and two tension members 12 arranged with the optical fiber core wire interposed therebetween.
As the optical fiber core 11, a single core fiber having an outer diameter of 250 μm, in which a resin coating is provided on the optical fiber strand, is used.
As the tension member 12, a steel wire having an outer diameter of about 0.2 to 0.7 mm, a plated steel wire obtained by plating copper or zinc on the steel wire, an alloy steel wire, or the like is usually used.
[0008]
The support wire portion 15 has a support wire 14 made of a steel wire, a plated steel wire, an alloy steel wire or the like having an outer diameter of about 1 to 2 mm, and the feeder wire composite type single core drop cable 10 is connected to the utility pole by this support wire. It is constructed between them.
The power supply unit 17 includes a power supply line 16 made of a soft copper wire having an outer diameter of about 1 to 2 mm, and power is supplied through the power supply line 16.
And the optical element part 13, the support line part 15, and the feeder line part 17 are integrated by the sheath 18 which consists of thermoplastic resins, such as polyethylene, These cross-sectional shapes are the support line parts 15 circular. Thus, the optical element portion 13 and the feeder line portion 17 are rectangular.
[0009]
In this feed line composite type single core drop cable 10, one optical fiber core wire 11, two tension members 12, a support wire 14, and a feed wire 16 are centered on the same straight line L. It is arranged to exist on 1 .
Further, in the optical element portion 13, a wedge-shaped cutout portion 18 a for tearing is formed at both ends of the portion where the optical fiber core wire 11 of the sheath 18 is located. A bridge portion 18b is formed between the optical element portion 13 and the support line portion 15, and between the optical element portion 13 and the feeder line portion 17, so that these portions can be easily separated. It has become.
[0010]
There is no particular limitation on the dimensions of the feed lines composite single-core drop cable 10, the optical element unit 13, the major diameter D 1 is 3.0 mm, short diameter D 2 is 1.6 mm, the outer diameter of the tension members 12 0.4 mm.
The feeder 17 has a major axis D 3 of 4.8 mm and a minor axis D 4 of 2.4 mm, and the outer diameter of the feeder 16 is usually 1.2 mm.
Further, the support portion 15 normally has an outer diameter D 5 of 2.4 mm, the support wire 14 has an outer diameter of 1.2 mm, and the thickness of the sheath 18 in the support portion 15 is 0.6 mm. The overall length D 6 of the power supply line composite type single core drop cable 10 is 10.8 mm.
[0011]
The feed line composite single core drop cable 10 can be manufactured, for example, as follows. First, the optical fiber is passed through a pot supplied with an ultraviolet curable resin, and this is applied to the optical fiber. Next, the applied ultraviolet curable resin is cured by ultraviolet irradiation in a cross-linking cylinder to form an optical fiber core wire 11.
Then, two tension members 12 are vertically attached to the obtained optical fiber core wire 11 so that they are symmetrical with respect to the optical fiber core wire 11, and then the support wire 14 and the feeder wire 16 are connected. The optical fiber core wire 11, the tension member 12, the support wire 14, and the feeder wire 16 are arranged so that the centers of the cross-sectional circles exist on the same straight line. Then, these are passed through a crosshead die of an extruder, extruded with a molten resin such as polyethylene, and integrated with a sheath 18 to obtain a feed line composite type single core drop cable 10.
[0012]
Such a feed line composite type single core drop cable 10 is obtained by integrating an optical fiber core line 11, two tension members 12, a support line 14, and a feed line 16 with a sheath 18. Therefore, it can be manufactured with few steps and low cost. Further, this feed line composite type single-core drop cable 10 includes an optical fiber core line 11, two tension members 12, a support line 14, and a feed line 16, with the centers of their cross-sectional circles being on the same straight line. Therefore, the separation work can be easily performed and the laying can be easily performed as compared with the conventional example.
Further, a bridge portion 18 b is formed in the sheath 18 at the boundary portion between the optical element portion 13, the support wire portion 15, and the feeder line portion 17, and in the vicinity of the optical fiber core wire 11 of the sheath 18 of the optical element portion 13. By forming the notch portion 18a for tearing, the separation operation can be performed more easily.
In the illustrated example, the support line portion 15, the optical element portion 13, and the feeder line portion 17 are integrated in this order, but this order is not limited and can be arranged in any order.
[0013]
【The invention's effect】
As described above, the power supply line composite type single core drop cable of the present invention can be produced at low cost and can be easily laid and separated. Therefore, it is particularly suitable for wiring to ONUs installed in apartment houses or buildings.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing one embodiment of a feed line composite type single core drop optical fiber cable of the present invention.
FIG. 2 is an explanatory diagram illustrating a network system.
FIG. 3 is a cross-sectional view of a composite drop cable.
FIG. 4 is a cross-sectional view showing one embodiment of a conventional feeder line composite type single-core drop optical fiber cable.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Feed line composite type | mold single fiber drop optical fiber cable, 11 ... Optical fiber core wire, 12 ... Tension member, 13 ... Optical element part, 14 ... Support line, 15 ... Support line part, 16 ... Feed line, 17 ... Feed Electric wire part, 18 ... sheath, 18a ... notch part, 18b ... bridge part

Claims (3)

１本の光ファイバ心線とこの光ファイバ心線を中心に挟んで配された２本のテンションメンバを有する光エレメント部と、この光エレメント部を支持する支持線を有する支持線部と、給電線を有する給電線部からなり、
１本の光ファイバ心線と、２本のテンションメンバと、支持線と、給電線は、これらの断面の中心が同一直線上に存在するように配されていて、シースで一体化されていることを特徴とする給電線複合型単心ドロップ光ファイバケーブル。An optical element portion having one optical fiber core wire and two tension members arranged around the optical fiber core wire; a support wire portion having a support wire for supporting the optical element portion; It consists of a feeder line part with wires,
One optical fiber core wire, two tension members, a support wire, and a feed line are arranged so that the centers of these sections are on the same straight line, and are integrated by a sheath. A feed-line composite type single-core drop optical fiber cable. 光エレメント部と支持線部と給電線部の各部の境界部分のシースには、ブリッジ部が形成され、光エレメント部のシースの光ファイバ心線近傍には、引き裂き用の切り欠き部が形成されていることを特徴とする請求項１に記載の給電線複合型単心ドロップ光ファイバケーブル。A bridge portion is formed in the sheath at the boundary between the optical element portion, the support wire portion, and the feeder line portion, and a tear-out notch portion is formed in the vicinity of the optical fiber core wire of the sheath of the optical element portion. The feed line composite type single-core drop optical fiber cable according to claim 1, wherein: １本の光ファイバ心線に、２本のテンションメンバをこれらが光ファイバ心線に対して対称位置となるように縦添えし、
ついで、支持線と給電線とを、光ファイバ心線と、テンションメンバと、支持線と、給電線の断面円の中心が同一直線上に存在するように配し、
ついで、これらをシースで一体化することを特徴とする給電線複合型単心ドロップ光ファイバケーブルの製造方法。Two tension members are vertically attached to one optical fiber so that they are symmetrical with respect to the optical fiber,
Next, the support line and the feed line are arranged so that the center of the cross-sectional circle of the optical fiber core wire, the tension member, the support line, and the feed line exists on the same straight line,
Next, a method of manufacturing a feed-line composite type single-core drop optical fiber cable, wherein these are integrated by a sheath.
JP2000073151A 2000-03-15 2000-03-15 Feed line composite type single core drop optical fiber cable and manufacturing method thereof Expired - Lifetime JP3710672B2 (en)

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CN102141665A (en) * 2011-04-12 2011-08-03 江苏俊知光电通信有限公司 Butterfly-shaped cable for comprehensive optical and electric communication signal transmission

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JPS5976016U (en) * 1982-11-13 1984-05-23 株式会社フジクラ Fiber optic cord with power line
JPS59110915U (en) * 1983-01-18 1984-07-26 日立電線株式会社 composite cable
JPH10301002A (en) * 1997-04-30 1998-11-13 Sumitomo Electric Ind Ltd Optical fiber flat type cable
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