JP5857889B2 - Protective sleeve - Google Patents
Protective sleeve Download PDFInfo
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- JP5857889B2 JP5857889B2 JP2012143184A JP2012143184A JP5857889B2 JP 5857889 B2 JP5857889 B2 JP 5857889B2 JP 2012143184 A JP2012143184 A JP 2012143184A JP 2012143184 A JP2012143184 A JP 2012143184A JP 5857889 B2 JP5857889 B2 JP 5857889B2
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- 230000001681 protective effect Effects 0.000 title claims description 60
- 239000013307 optical fiber Substances 0.000 claims description 69
- 239000000853 adhesive Substances 0.000 claims description 46
- 230000001070 adhesive effect Effects 0.000 claims description 46
- 238000007526 fusion splicing Methods 0.000 claims description 21
- 239000011521 glass Substances 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 230000004927 fusion Effects 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
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
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2558—Reinforcement of splice joint
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Description
本発明は、光ファイバ心線同士を融着接続した光ファイバ融着接続部を補強する保護スリーブに関する。 The present invention relates to a protective sleeve that reinforces an optical fiber fusion spliced portion in which optical fiber core wires are fused.
単心または多心の光ファイバ心線同士が接続される光ファイバ融着接続部を補強する補強部材として、熱収縮チューブの内部に、熱溶融性接着チューブと、一面がフラット面を有し他面が円弧形状を有するセラミックガラスまたは強化ガラス等で形成された抗張力体と、が設けられ、当該抗張力体のフラット面が接着チューブ側に配置されているものが知られている（例えば、特許文献１参照）。 As a reinforcing member that reinforces the optical fiber fusion spliced part where single-core or multi-core optical fiber cores are connected to each other, a heat-meltable adhesive tube inside the heat-shrinkable tube, and one surface has a flat surface And a tensile strength member formed of ceramic glass or tempered glass whose surface has an arc shape, and a flat surface of the tensile strength member disposed on the adhesive tube side is known (for example, Patent Documents). 1).
屋外に配設されるドロップケーブルなどに使用される光ファイバケーブルの光ファイバ心線同士を融着接続する場合には、補強部材の強度を確保することが重要である。しかし、特許文献１のようにセラミックガラスまたは強化ガラス等で形成された抗張力体のみを使用した場合、特に長尺（例えば６０ｍｍ以上）の抗張力体を用いる際の強度確保が難しくなる。
また、補強部材の強度を確保するためにガラス製の抗張力体の体積を増やすと、補強部材のサイズが大きくなって熱容量が増える。そのため、補強部材を加熱収縮させて光ファイバ融着接続部を補強する際の加熱時間が長くなってしまう。
さらに、ガラス製の抗張力体に代えて金属製の抗張力体を使用した場合、金属製の抗張力体とガラス製の光ファイバとの熱膨張係数が異なるため、補強部材を加熱収縮させる際に光ファイバに歪みが加わり、好ましくない。
It is important to secure the strength of the reinforcing member when the optical fiber cores of the optical fiber cable used for a drop cable or the like disposed outdoors are fusion-bonded. However, when only a strength member formed of ceramic glass or tempered glass is used as in Patent Document 1, it is difficult to ensure strength particularly when using a long strength member (for example, 60 mm or more).
Further, when the volume of the glass strength member is increased in order to ensure the strength of the reinforcing member, the size of the reinforcing member increases and the heat capacity increases. For this reason, the heating time for reinforcing the optical fiber fusion spliced part by heating and shrinking the reinforcing member becomes long.
Furthermore, when a metal strength member is used instead of a glass strength member, the thermal strength coefficient of the metal strength member and the glass optical fiber are different. This is not preferable because of distortion.
本発明の目的は、小型化により加熱収縮時間を短縮できるとともに、十分な強度にて光ファイバ融着接続部を補強することが可能な保護スリーブを提供することにある。 An object of the present invention is to provide a protective sleeve that can shorten the heat shrinkage time due to downsizing and can reinforce the optical fiber fusion spliced portion with sufficient strength.
上記課題を解決することのできる本発明の保護スリーブは、
光ファイバ心線の融着接続部を補強する保護スリーブであって、
前記融着接続部が収容される熱可塑性の接着チューブと、
ガラスまたはセラミクスを主成分とする第一の抗張力体と、
金属を主成分とする第二の抗張力体と、
前記接着チューブと前記第一および第二の抗張力体とを収容する熱収縮性の保護チューブと、
を備え、
前記第一の抗張力体の一面は平面をなし、他面は断面円弧状の曲面をなし、
前記第一の抗張力体の前記一面側に前記接着チューブが設けられ、
前記第二の抗張力体の体積は前記第一の抗張力体の体積よりも小さいことを特徴とする。
The protective sleeve of the present invention capable of solving the above problems is
A protective sleeve for reinforcing a fusion spliced portion of an optical fiber core wire,
A thermoplastic adhesive tube in which the fusion splicing part is accommodated;
A first strength member mainly composed of glass or ceramics;
A second tensile body mainly composed of metal;
A heat-shrinkable protective tube that houses the adhesive tube and the first and second strength members;
With
One surface of the first tensile body is a flat surface, and the other surface is a curved surface having an arcuate cross section,
The adhesive tube is provided on the one surface side of the first tensile body,
The volume of the second strength member is smaller than the volume of the first strength member.
また、本発明の保護スリーブにおいて、前記第二の抗張力体は前記第一の抗張力体の前記他面側に設けられていてもよい。 In the protective sleeve of the present invention, the second strength member may be provided on the other surface side of the first strength member.
また、本発明の保護スリーブにおいて、前記第二の抗張力体は前記接着チューブを挟んで前記第一の抗張力体の前記一面に対向して設けられていてもよい。 In the protective sleeve of the present invention, the second strength member may be provided to face the one surface of the first strength member with the adhesive tube interposed therebetween.
また、本発明の保護スリーブにおいて、前記第二の抗張力体が複数設けられていてもよい。 In the protective sleeve of the present invention, a plurality of the second strength members may be provided.
また、本発明の保護スリーブにおいて、前記第二の抗張力体の長さは前記第一の抗張力体の長さよりも短く、
前記第二の抗張力体は、前記第一の抗張力体の長手方向の中心部近傍に設けられていてもよい。
In the protective sleeve of the present invention, the length of the second strength member is shorter than the length of the first strength member,
The second strength member may be provided in the vicinity of the central portion in the longitudinal direction of the first strength member.
本発明の保護スリーブによれば、ガラスまたはセラミクスを主成分とする第一の抗張力体と、金属を主成分とし前記第一の抗張力体よりも体積が小さい第二の抗張力体と、が設けられていることにより、ガラス製の光ファイバに近い熱膨張係数を保ちつつ、小径でかつ十分な強度を確保でき、かつ、光ファイバ融着接続部を補強するための加熱収縮時間を短縮することができる。 According to the protective sleeve of the present invention, a first tensile body mainly composed of glass or ceramics and a second tensile body composed mainly of a metal and having a volume smaller than that of the first tensile body are provided. As a result, while maintaining a thermal expansion coefficient close to that of a glass optical fiber, it is possible to ensure a small diameter and sufficient strength, and to shorten the heat shrinkage time for reinforcing the optical fiber fusion spliced portion. it can.
以下、本発明に係る保護スリーブの実施形態について図面を参照して説明する。 Hereinafter, an embodiment of a protective sleeve according to the present invention will be described with reference to the drawings.
まず、本実施形態の保護スリーブにより補強される光ファイバケーブルとして、ドロップケーブルを例にとって説明する。 First, a drop cable will be described as an example of an optical fiber cable reinforced by the protective sleeve of the present embodiment.
図１に示すように、ドロップケーブルからなる光ファイバケーブル１００は、断面矩形状のケーブル部１００ａと、ケーブル部１００ａに縦添えされている支持線部１００ｂと、を備えている。
ケーブル部１００ａは、ケーブル部１００ａの断面中央部に埋設されている複数本（ここでは、８本）の光ファイバ心線１０１を備えている。光ファイバ心線１０１は、コア／クラッド部からなるガラスファイバ１１１を被覆１１２によって覆われて形成されている。さらに、複数の光ファイバ心線１０１が保護被覆１０４によって一体的に覆われることで、光ファイバテープ心線２００が形成されている。
また、ケーブル部１００ａは、この光ファイバテープ心線２００の両脇に縦添えされた抗張力体１０２と、光ファイバテープ心線２００および抗張力体１０２を埋設して一括被覆した合成樹脂製の外被１０３と、を備えている。
また、支持線部１００ｂは、金属線１０５を有し、その周囲がケーブル部１００ａの外被１０３と一体に形成される樹脂により覆われている。
As shown in FIG. 1, an optical fiber cable 100 made of a drop cable includes a cable section 100a having a rectangular cross section and a support line section 100b vertically attached to the cable section 100a.
The cable portion 100a includes a plurality (eight in this case) of optical fiber cores 101 embedded in the central portion of the cross section of the cable portion 100a. The optical fiber core 101 is formed by covering a glass fiber 111 composed of a core / cladding portion with a coating 112. Furthermore, the optical fiber tape core wire 200 is formed by integrally covering the plurality of optical fiber core wires 101 with the protective coating 104.
The cable portion 100a includes a tensile strength member 102 vertically attached to both sides of the optical fiber ribbon 200, and a synthetic resin outer sheath in which the optical fiber ribbon 200 and the tensile strength 102 are embedded and collectively covered. 103.
Further, the support wire portion 100b has a metal wire 105, and the periphery thereof is covered with a resin that is formed integrally with the jacket 103 of the cable portion 100a.
ケーブル部１００ａと支持線部１００ｂとの間は、薄肉部１００ｃを介して繋がっており、薄肉部１００ｃを切り裂くように切断することで、ケーブル部１００ａを支持線部１００ｂから分離できるようになっている。また、このケーブル部１００ａの表裏には、ノッチ１００ｄが形成されており、ノッチ１００ｄにてケーブル部１００ａを引き裂くことにより、光ファイバテープ心線２００を露出させることができる。 The cable part 100a and the support line part 100b are connected via a thin part 100c, and the cable part 100a can be separated from the support line part 100b by cutting the thin part 100c so as to cut. Yes. Also, notches 100d are formed on the front and back of the cable portion 100a, and the optical fiber ribbon 200 can be exposed by tearing the cable portion 100a with the notches 100d.
本実施形態の保護スリーブ１は、薄肉部１００ｃを切断して支持線部１００ｂから分離させてケーブル部１００ａのみ（すなわち、インドアケーブルの形態）とした光ファイバケーブル１００の融着接続部とその近傍部分を保護するものである。 The protective sleeve 1 of the present embodiment includes a fusion spliced portion of the optical fiber cable 100 and its vicinity in which the thin portion 100c is cut and separated from the support wire portion 100b to form only the cable portion 100a (that is, the form of an indoor cable) The part is protected.
図２および図３に示すように、保護スリーブ１は、最外周に配置された管状の保護チューブ１０を備えている。保護チューブ１０は、たとえば熱収縮性を有する樹脂から構成されており、その内部には、接着チューブ１１、第一の抗張力体１２および第二の抗張力体１３が収容されている。この保護チューブ１０は、光ファイバケーブル１００において、外被１０３が除去された部分とその両側部分を覆うことができる程度の長さであることが好ましい。 As shown in FIGS. 2 and 3, the protective sleeve 1 includes a tubular protective tube 10 disposed on the outermost periphery. The protective tube 10 is made of, for example, a heat-shrinkable resin, and an adhesive tube 11, a first strength member 12, and a second strength member 13 are accommodated therein. The protective tube 10 is preferably long enough to cover the portion of the optical fiber cable 100 from which the jacket 103 has been removed and both side portions thereof.
接着チューブ１１は、接着性を有する熱可塑性樹脂から構成され、その内部に光ファイバケーブル１００から露出された光ファイバ心線１０１が収容されている。この接着チューブ１１は、光ファイバケーブル１００において外被１０３が除去された部分と略同一の長さを有することが好ましい。 The adhesive tube 11 is made of an adhesive thermoplastic resin, and an optical fiber core wire 101 exposed from the optical fiber cable 100 is accommodated therein. The adhesive tube 11 preferably has substantially the same length as the portion of the optical fiber cable 100 from which the jacket 103 has been removed.
図２において、接着チューブ１１の下側には、ガラスまたはセラミクスを主成分として構成される第一の抗張力体１２が配置されている。たとえば本実施形態の第一の抗張力体１２は、石英ガラスにより形成されている。第一の抗張力体１２の接着チューブ１１と対向して設けられる一面１２ａは接着チューブ１１の幅とほぼ同一の幅の平面をなし、他面１２ｂは断面円弧状の曲面をなしている。また、この一面１２ａは、複数本の光ファイバ心線１０１の並列幅以上の幅を有することが好ましい。さらに、第一の抗張力体１２は、光ファイバケーブル１００において外被１０３が除去された部分と略同一の長さを有することが好ましい。 In FIG. 2, a first strength member 12 composed mainly of glass or ceramics is disposed below the adhesive tube 11. For example, the first strength member 12 of the present embodiment is made of quartz glass. One surface 12a provided facing the adhesive tube 11 of the first strength member 12 is a plane having a width substantially the same as the width of the adhesive tube 11, and the other surface 12b is a curved surface having an arcuate cross section. Moreover, it is preferable that this one surface 12a has a width | variety more than the parallel width of the some optical fiber core wire 101. FIG. Furthermore, the first strength member 12 preferably has substantially the same length as the portion of the optical fiber cable 100 from which the jacket 103 has been removed.
第二の抗張力体１３は、金属を主成分として構成され、第一の抗張力体１２の他面１２ｂ側に設けられている。たとえば本実施形態の第二の抗張力体１３は、鋼材により形成されている。この第二の抗張力体１３は光ファイバ心線１０１に沿って第一の抗張力体１２の長手方向の中心部近傍に配置されている。
また、第二の抗張力体１３は、細径の円柱形状であって、第一の抗張力体１２よりも長さが短く、断面積が小さいものであることが好ましい。すなわち、第二の抗張力体１３の体積は第一の抗張力体１２の体積よりも小さいものである。
The second strength member 13 is composed mainly of metal and is provided on the other surface 12 b side of the first strength member 12. For example, the second strength member 13 of this embodiment is formed of a steel material. The second strength member 13 is disposed in the vicinity of the longitudinal center of the first strength member 12 along the optical fiber core wire 101.
Moreover, it is preferable that the 2nd strength body 13 is a cylindrical shape with a small diameter, is shorter than the 1st strength body 12, and has a small cross-sectional area. That is, the volume of the second strength member 13 is smaller than the volume of the first strength member 12.
次に、保護スリーブ１を用いた光ファイバ融着接続部の補強方法について説明する。
まず、保護チューブ１０および接着チューブ１１の内部に、互いに接続される光ファイバケーブル１００のうち一方の光ファイバケーブル１００を挿通しておく。
次に、それぞれの光ファイバケーブル１００の端部において外被１０３および光ファイバテープ心線２００の保護被覆１０４を段階的に除去し、光ファイバ心線１０１を露出させる。さらに、光ファイバ心線１０１の被覆１１２を僅かに残して除去し、ガラスファイバ１１１を露出させる。その後、ガラスファイバ１１１の端部同士を融着位置にて突き合わせ、この状態でアーク放電等によりガラスファイバ１１１の端面同士を融着接続させて光ファイバ融着接続部１１３を形成する。
Next, a method for reinforcing the optical fiber fusion spliced portion using the protective sleeve 1 will be described.
First, one optical fiber cable 100 among optical fiber cables 100 connected to each other is inserted into the protective tube 10 and the adhesive tube 11.
Next, the jacket 103 and the protective coating 104 of the optical fiber ribbon 200 are removed stepwise at the end of each optical fiber cable 100 to expose the optical fiber 101. Furthermore, the coating 112 of the optical fiber core wire 101 is removed leaving a slight amount, and the glass fiber 111 is exposed. Thereafter, the end portions of the glass fibers 111 are butted at the fusion position, and in this state, the end surfaces of the glass fibers 111 are fusion-bonded by arc discharge or the like to form the optical fiber fusion-bonding portion 113.
ガラスファイバ１１１の端面同士を融着接続させた後、図４に示すように、一方の光ファイバケーブル１００に挿通させておいた接着チューブ１１をスライドさせて、接着チューブ１１の内側の中央部に光ファイバ融着接続部１１３が位置するように配置する。 After the end surfaces of the glass fibers 111 are fused and connected, as shown in FIG. 4, the adhesive tube 11 inserted through one optical fiber cable 100 is slid to the center inside the adhesive tube 11. It arrange | positions so that the optical fiber fusion splicing part 113 may be located.
次に、図５に示すように、接着チューブ１１に覆われた光ファイバ融着接続部１１３の下側から第一の抗張力体１２を沿わせ、さらに第一の抗張力体１２の下側から第一の抗張力体１２の長手方向の中央に第二の抗張力体１３を沿わせる。ここで、接着チューブ１１と第一の抗張力体１２とを接着し、第一の抗張力体１２と第二の抗張力体１３とを接着しておくとよい。 Next, as shown in FIG. 5, the first tensile body 12 is placed from the lower side of the optical fiber fusion splicing portion 113 covered by the adhesive tube 11, and further, the first tensile body 12 is moved from the lower side of the first tensile body 12. The second strength member 13 is placed along the center of one strength member 12 in the longitudinal direction. Here, the adhesive tube 11 and the first strength member 12 may be adhered, and the first strength member 12 and the second strength member 13 may be adhered.
この状態にて、保護チューブ１０をスライドさせ、図３に示すように、第一の抗張力体１２および第二の抗張力体１３を沿わせた接着チューブ１１を保護チューブ１０により覆う。このとき、保護チューブ１０は、その両端が、光ファイバケーブル１００の外被１０３までを覆うように配設される。 In this state, the protective tube 10 is slid, and as shown in FIG. 3, the adhesive tube 11 along with the first tensile body 12 and the second tensile body 13 is covered with the protective tube 10. At this time, the protective tube 10 is disposed so that both ends thereof cover up to the jacket 103 of the optical fiber cable 100.
その後、不図示のヒータ等により保護チューブ１０および接着チューブ１１を加熱して接着チューブ１１を溶融させるとともに保護チューブ１０を熱収縮させる。これにより、接着チューブ１１は光ファイバ融着接続部１１３およびその両端のガラスファイバ１１１に密着して一体化する。また、保護チューブ１０は、接着チューブ１１、第一の抗張力体１２および第二の抗張力体１３に密着して一体化する。
このようにして、光ファイバ融着接続部１１３の補強処理が完了する。
Thereafter, the protective tube 10 and the adhesive tube 11 are heated by a heater (not shown) to melt the adhesive tube 11 and heat-shrink the protective tube 10. Thereby, the adhesive tube 11 is brought into close contact with and integrated with the optical fiber fusion splicing portion 113 and the glass fibers 111 at both ends thereof. The protective tube 10 is in close contact with and integrated with the adhesive tube 11, the first strength member 12, and the second strength member 13.
In this way, the reinforcing process of the optical fiber fusion splicing part 113 is completed.
なお、保護チューブ１０および接着チューブ１１を加熱する際は、まず、保護チューブ１０および接着チューブ１１の中央部が高温で加熱収縮され、その後、保護チューブ１０および接着チューブ１１の端部が加熱収縮されるように、ヒータに加熱温度分布を設けていることが好ましい。これにより、加熱収縮時に保護チューブ１０および接着チューブ１１内に発生した気泡が、保護チューブ１０および接着チューブ１１の両端部から抜けやすくなる。 When heating the protective tube 10 and the adhesive tube 11, first, the central portions of the protective tube 10 and the adhesive tube 11 are heated and shrunk at a high temperature, and then the end portions of the protective tube 10 and the adhesive tube 11 are heat shrunk. Thus, it is preferable to provide a heating temperature distribution in the heater. As a result, bubbles generated in the protective tube 10 and the adhesive tube 11 at the time of heat shrinkage are easily removed from both ends of the protective tube 10 and the adhesive tube 11.
以上説明したように、本実施形態の保護スリーブ１によれば、光ファイバ融着接続部１１３を接着チューブ１１により覆い、この接着チューブ１１に第一の抗張力体１２および第二の抗張力体１３を沿わせて、その外周をさらに保護チューブ１０によって覆うことにより、光ファイバ融着接続部１１３を確実に保護するとともに、ドロップケーブルに加わる張力に対して十分な強度で補強することができる。 As described above, according to the protective sleeve 1 of the present embodiment, the optical fiber fusion splicing portion 113 is covered with the adhesive tube 11, and the first tensile strength body 12 and the second tensile strength body 13 are covered with the adhesive tube 11. In addition, by further covering the outer periphery with the protective tube 10, the optical fiber fusion splicing portion 113 can be reliably protected and reinforced with sufficient strength against the tension applied to the drop cable.
特に、ガラスまたはセラミクスを主成分とする第一の抗張力体１２のほかに金属を主成分とする第二の抗張力体１３を接着チューブ１１に覆われた光ファイバ融着接続部１１３に沿わせているので、強度確保のために第一の抗張力体１２のサイズを大きくする必要がない。そのため、小径の保護スリーブ１により十分な強度を確保できるとともに、光ファイバ融着接続部１１３を補強するための保護スリーブ１の加熱収縮時間を短縮することができる。 In particular, in addition to the first strength member 12 mainly composed of glass or ceramics, the second strength member 13 composed mainly of metal is placed along the optical fiber fusion splicing portion 113 covered with the adhesive tube 11. Therefore, it is not necessary to increase the size of the first strength member 12 in order to ensure the strength. Therefore, sufficient strength can be secured by the protective sleeve 1 having a small diameter, and the heat shrinkage time of the protective sleeve 1 for reinforcing the optical fiber fusion splicing portion 113 can be shortened.
ところで、第二の抗張力体１３の体積を第一の抗張力体１２の体積よりも大きくした場合、金属製の第二の抗張力体１３とガラス製の光ファイバ心線１０１とは熱膨張係数が異なるため、保護チューブ１０や接着チューブ１１を加熱収縮させる際に光ファイバ心線１０１に歪みが加わり、伝送損失の増大や割れの発生が懸念される。本実施形態によれば、第二の抗張力体１３の体積を第一の抗張力体１２の体積よりも小さくすることで、第二の抗張力体１３による影響をできるだけ抑えて、ガラスファイバ１１１に近い熱膨張係数を保つことができる。これにより、保護スリーブ１を加熱収縮させて光ファイバ融着接続部１１３を補強した後でも、ガラスファイバ１１１に歪みが加わることによる悪影響を抑制することができる。 By the way, when the volume of the second strength member 13 is made larger than the volume of the first strength member 12, the metal second strength member 13 and the glass optical fiber core 101 have different thermal expansion coefficients. For this reason, when the protective tube 10 and the adhesive tube 11 are heated and contracted, the optical fiber core wire 101 is distorted, and there is a concern that transmission loss may increase and cracks may occur. According to the present embodiment, the volume of the second strength member 13 is made smaller than the volume of the first strength member 12, thereby suppressing the influence of the second strength member 13 as much as possible, and heat close to the glass fiber 111. The expansion coefficient can be maintained. Thereby, even after the protective sleeve 1 is heated and shrunk to reinforce the optical fiber fusion splicing portion 113, adverse effects due to the strain applied to the glass fiber 111 can be suppressed.
また、第二の抗張力体１３が第一の抗張力体１２の長手方向の中心部近傍に設けられているため、第二の抗張力体１３の長さを最小限のものとしつつ、保護スリーブ１の強度を十分に確保することができる。 Further, since the second strength member 13 is provided in the vicinity of the central portion in the longitudinal direction of the first strength member 12, the length of the second strength member 13 is minimized while the protective sleeve 1 Sufficient strength can be secured.
以上において本発明の実施の形態の一例を説明したが、本発明は上記実施の形態に限定されるものでなく、必要に応じて他の構成を採用することが可能である。 Although an example of an embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and other configurations can be adopted as necessary.
上記の実施形態においては、一本の第二の抗張力体１３が設けられている構成としたが、図６に示す保護スリーブ１ａのように、複数本（ここでは２本）の第二の抗張力体１３，１３が第一の抗張力体１２の他面１２ｂ側に設けられている構成であってもよい。この構成によれば、保護スリーブ１の強度をさらに向上させることができる。 In the above embodiment, the single second strength member 13 is provided. However, a plurality of (here, two) second strength members are provided as in the protective sleeve 1a shown in FIG. The structure by which the bodies 13 and 13 are provided in the other surface 12b side of the 1st strength body 12 may be sufficient. According to this configuration, the strength of the protective sleeve 1 can be further improved.
また、上記の実施形態においては、第二の抗張力体１３が第一の抗張力体１２の他面１２ｂ側に設けられている構成としたが、図７に示す保護スリーブ１ｂのように、第二の抗張力体１３が接着チューブ１１を挟んで第一の抗張力体１２の一面１２ａに対向して設けられていてもよい。このようにしても、上記の実施形態と同様の効果を得ることができるが、図７のように第二の抗張力体１３が接着チューブ１１と接した状態であると、複数本の光ファイバ心線１０１の一部が第二の抗張力体１３による側圧の影響を受ける可能性があるため、図２および図６に示すような形態を採用する方が好ましい。 Further, in the above embodiment, the second strength member 13 is provided on the other surface 12b side of the first strength member 12, but the second strength member 13 has a configuration like the protective sleeve 1b shown in FIG. The tensile body 13 may be provided to face the one surface 12a of the first tensile body 12 with the adhesive tube 11 in between. Even if it does in this way, although the same effect as said embodiment can be acquired, when the 2nd strength body 13 is in the state which contact | connected the adhesion | attachment tube 11 like FIG. Since a part of the wire 101 may be affected by the side pressure by the second strength member 13, it is preferable to adopt the form shown in FIGS. 2 and 6.
また、上記の実施形態においては、保護チューブ１０と接着チューブ１１とを同時に加熱して溶融あるいは収縮させる構成としたが、これらを別々に加熱してもよい。たとえば、光ファイバ融着接続部１１３を接着チューブ１１により覆った際に接着チューブ１１を加熱溶融させて予め光ファイバ融着接続部１１３に密着一体化させておき、第一の抗張力体１２および第二の抗張力体１３を光ファイバ融着接続部１１３に沿わせてその全体を保護チューブ１０により覆った後に保護チューブ１０を加熱して収縮させる方法を採用してもよい。この方法によれば、予め接着チューブ１１が光ファイバ融着接続部１１３に密着一体化されるため、その後の処理が容易となる。 In the above embodiment, the protective tube 10 and the adhesive tube 11 are heated and melted or shrunk at the same time, but they may be heated separately. For example, when the optical fiber fusion splicing part 113 is covered with the adhesive tube 11, the adhesive tube 11 is heated and melted to be closely integrated with the optical fiber fusion splicing part 113 in advance, and the first strength member 12 and the first A method may be employed in which the second tensile body 13 is placed along the optical fiber fusion splicing portion 113 and the whole is covered with the protective tube 10 and then the protective tube 10 is heated and contracted. According to this method, since the adhesive tube 11 is tightly integrated with the optical fiber fusion splicing portion 113 in advance, subsequent processing becomes easy.
また、上記の実施形態においては、光ファイバ融着接続部１１３は、接着チューブ１１に覆われてから、第一の抗張力体１２および第二の抗張力体１３を沿わせて、最後に保護チューブ１０で覆われる構成としたが、保護チューブ１０内部の所定位置に接着チューブ１１、第一の抗張力体１２および第二の抗張力体１３が配置されるようこれらを予め一体化させた保護スリーブ１を作製しておき、一体化された保護スリーブ１の内側に光ファイバ融着接続部１１３を挿通させて、保護スリーブ１を加熱収縮させることもできる。この構成によれば、予め保護チューブ１０の長手方向の中心位置と、接着チューブ１１、第一の抗張力体１２および第二の抗張力体１３の長手方向の各中心位置とが一致するように一体化させることもできるため、光ファイバ融着接続部１１３を保護チューブ１０の長手方向の中心位置と一致するように配置するだけで、接着チューブ１１、第一の抗張力体１２および第二の抗張力体１３の位置決めも行うことができる。 In the above embodiment, the optical fiber fusion splicing portion 113 is covered with the adhesive tube 11, and then the first tensile body 12 and the second tensile body 13 are placed, and finally the protective tube 10. The protective sleeve 1 is produced by previously integrating the adhesive tube 11, the first strength member 12, and the second strength member 13 at predetermined positions inside the protection tube 10. In addition, the protective sleeve 1 can be heated and shrunk by inserting the optical fiber fusion splicing portion 113 inside the integrated protective sleeve 1. According to this configuration, the center position in the longitudinal direction of the protective tube 10 and the center positions in the longitudinal direction of the adhesive tube 11, the first tensile body 12, and the second tensile body 13 are integrated in advance. Therefore, the adhesive tube 11, the first strength member 12, and the second strength member 13 can be obtained simply by arranging the optical fiber fusion splicing portion 113 so as to coincide with the longitudinal center position of the protective tube 10. Can also be positioned.
なお、上記実施形態では、互いに接続される光ファイバケーブル１００として、複数本の光ファイバ心線を有する多心のドロップ／インドアケーブルを例にとって説明したが、例えば、単心の光ファイバ心線を有するドロップ／インドアケーブル同士を融着接続する場合にも適用可能である。単心の光ファイバ心線を有するドロップ／インドアケーブルの場合は、第一の抗張力体１２は平面状の一面１２ａを有している必要はなく、第二の抗張力体１３と同様に円柱形状であればよい。 In the above embodiment, a multi-core drop / indoor cable having a plurality of optical fiber cores has been described as an example of the optical fiber cables 100 connected to each other. The present invention can also be applied to the case where the drop / indoor cables that are included are fusion-connected. In the case of a drop / indoor cable having a single optical fiber core, the first strength member 12 does not need to have a flat one surface 12a, and has a cylindrical shape like the second strength member 13. I just need it.
１：保護スリーブ、１０：保護チューブ、１１：接着チューブ、１２：第一の抗張力体、１３：第二の抗張力体、１００：光ファイバケーブル、１０１：光ファイバ心線、１１１：ガラスファイバ、１１３：光ファイバ融着接続部 1: protective sleeve, 10: protective tube, 11: adhesive tube, 12: first tensile body, 13: second tensile body, 100: optical fiber cable, 101: optical fiber core wire, 111: glass fiber, 113 : Optical fiber fusion splice
Claims (5)
前記融着接続部が収容される熱可塑性の接着チューブと、
ガラスまたはセラミクスを主成分とする第一の抗張力体と、
金属を主成分とする第二の抗張力体と、
前記接着チューブと前記第一の抗張力体および前記第二の抗張力体とを収容する熱収縮性の保護チューブと、
を備え、
前記第一の抗張力体の一面は平面をなし、他面は断面円弧状の曲面をなし、
前記第一の抗張力体の前記一面側に前記接着チューブが設けられ、
前記第二の抗張力体の体積は前記第一の抗張力体の体積よりも小さい、保護スリーブ。 A protective sleeve for reinforcing a fusion spliced portion of an optical fiber core wire,
A thermoplastic adhesive tube in which the fusion splicing part is accommodated;
A first strength member mainly composed of glass or ceramics;
A second tensile body mainly composed of metal;
A heat-shrinkable protective tube that houses the adhesive tube, the first tensile body, and the second tensile body;
With
One surface of the first tensile body is a flat surface, and the other surface is a curved surface having an arcuate cross section,
The adhesive tube is provided on the one surface side of the first tensile body,
The protective sleeve, wherein a volume of the second strength member is smaller than a volume of the first strength member.
前記第二の抗張力体は、前記第一の抗張力体の長手方向の中心部近傍に設けられている、請求項１から４のいずれか一項に記載の保護スリーブ。 The length of the second strength member is shorter than the length of the first strength member,
5. The protective sleeve according to claim 1, wherein the second strength member is provided in the vicinity of a center portion in a longitudinal direction of the first strength member.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
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| JP2012143184A JP5857889B2 (en) | 2012-06-26 | 2012-06-26 | Protective sleeve |
| MYPI2014701052A MY178956A (en) | 2012-06-26 | 2013-03-28 | Protective sleeve |
| PCT/JP2013/059299 WO2014002558A1 (en) | 2012-06-26 | 2013-03-28 | Protective sleeve |
| KR1020147036110A KR102049731B1 (en) | 2012-06-26 | 2013-03-28 | Protective sleeve |
| BR112014029411-9A BR112014029411B1 (en) | 2012-06-26 | 2013-03-28 | protective sleeve |
| CN201380003693.3A CN103907039B (en) | 2012-06-26 | 2013-03-28 | Protection sleeve |
| TW102113348A TWI594035B (en) | 2012-06-26 | 2013-04-15 | Protective sleeve |
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| JP2012143184A JP5857889B2 (en) | 2012-06-26 | 2012-06-26 | Protective sleeve |
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| KR (1) | KR102049731B1 (en) |
| CN (1) | CN103907039B (en) |
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| KR102088745B1 (en) * | 2019-08-27 | 2020-05-29 | (주)에프비지코리아 | Durable fiber optic splicing device and fiber splicing method using the same |
| JP2022110866A (en) * | 2021-01-19 | 2022-07-29 | 古河電気工業株式会社 | Reinforcement sleeve and reinforcement structure of optical fiber connection part |
| CN114706179B (en) * | 2022-04-06 | 2023-09-01 | 富通集团（嘉善）通信技术有限公司 | Wind-light-resistant cable |
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| JPS55129305A (en) * | 1979-03-29 | 1980-10-07 | Nippon Telegr & Teleph Corp <Ntt> | Reinforcing method of optical fiber connecting part and reinforcing member |
| JPS5893016A (en) * | 1981-11-30 | 1983-06-02 | Nippon Telegr & Teleph Corp <Ntt> | Reinforcing member for connected part of optical fiber |
| JPS6114611A (en) * | 1984-06-29 | 1986-01-22 | Fujitsu Ltd | Reinforcing method of connecting part of optical fiber |
| JPS6219605U (en) * | 1985-07-22 | 1987-02-05 | ||
| JPS6432208A (en) | 1987-07-28 | 1989-02-02 | Sumitomo Electric Industries | Reinforcing member for optical fiber fusion splicing part |
| US6621966B2 (en) | 1999-03-31 | 2003-09-16 | Corning Cable Systems Llc | Fiber optic cable with profiled group of optical fibers |
| JP3293594B2 (en) * | 1999-06-29 | 2002-06-17 | 住友電気工業株式会社 | Apparatus and method for heating protective member of optical fiber fusion spliced part |
| US6728451B2 (en) * | 1999-09-21 | 2004-04-27 | Tyco Telecommunications (Us) Inc. | Optical fiber holding structure and method of making same |
| AU2002211318A1 (en) * | 2000-11-09 | 2002-05-21 | Tycom (Us) Inc. | High temperature fiber optic splint |
| KR100405106B1 (en) * | 2001-03-06 | 2003-11-10 | 이정연 | Heat shrinkable tube |
| JP4161821B2 (en) * | 2003-07-02 | 2008-10-08 | 住友電気工業株式会社 | Fusion splicing reinforcement method |
| JP4999075B2 (en) * | 2007-03-28 | 2012-08-15 | 古河電気工業株式会社 | Reinforcing sleeve heating device and fusion splicer |
| CA2677420C (en) * | 2007-09-07 | 2016-01-26 | Sumitomo Electric Industries, Ltd. | Protection sleeve, manufacturing apparatus for protection sleeve, and manufacturing method for protection sleeve |
| JP5243313B2 (en) * | 2009-03-11 | 2013-07-24 | 住友電気工業株式会社 | Optical fiber holder and fusion splicer |
| JP5276483B2 (en) * | 2009-03-11 | 2013-08-28 | 住友電気工業株式会社 | Method and structure for reinforcing connection |
| US9046671B2 (en) * | 2010-05-14 | 2015-06-02 | Sumitomo Electric Industries, Ltd. | Composite optical fiber cable and composite optical fiber cable assembly providing protection by flexure |
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| TWI594035B (en) | 2017-08-01 |
| KR20150027762A (en) | 2015-03-12 |
| BR112014029411B1 (en) | 2022-01-25 |
| KR102049731B1 (en) | 2019-11-28 |
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| JP2014006430A (en) | 2014-01-16 |
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