JPS6153688B2 - - Google Patents
Info
- Publication number
- JPS6153688B2 JPS6153688B2 JP3509282A JP3509282A JPS6153688B2 JP S6153688 B2 JPS6153688 B2 JP S6153688B2 JP 3509282 A JP3509282 A JP 3509282A JP 3509282 A JP3509282 A JP 3509282A JP S6153688 B2 JPS6153688 B2 JP S6153688B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- sealing member
- tapered hole
- hard material
- hole
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 239000013307 optical fiber Substances 0.000 claims description 46
- 238000007789 sealing Methods 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 26
- 239000013013 elastic material Substances 0.000 claims description 19
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000011247 coating layer Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 description 26
- 239000010410 layer Substances 0.000 description 13
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000012681 fiber drawing Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920001187 thermosetting polymer 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
- G02B6/4428—Penetrator systems in pressure-resistant devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Light Guides In General And Applications Therefor (AREA)
Description
【発明の詳細な説明】
本発明は、耐水圧気密性を必要とする海底光ケ
ーブルの密封成端部や、光フアイバの耐水圧特性
試験を行うため等の心線引出方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed termination part of a submarine optical cable that requires water pressure airtightness, and a method for drawing out a core wire for testing the water pressure property of an optical fiber.
従来の密封心線引出構造を第１図に示す。従来
の密封心線の引出方法は、金属あるいはセラミツ
クスなど気密性を有する板１に、側面がテーパ状
をなし底部に光フアイバ心線外径より若干孔径の
大きい貫通孔２を有する凹部３を設け、光フアイ
バ心線５の被覆を完全に除去して光フアイバ素線
４を剥出し、該素線４が凹部３に収納されるよう
光フアイバ心線５を貫通孔２に引き通し、凹部３
に硬化性樹脂を充填固化させて、密封心線の引出
構造を形成する。上記従来の方法は、光フアイバ
心線の被覆層を完全に除去するため、光フアイバ
素線が破断し易く作業が非常に困難である。ま
た、作業者の熟練度によつて長期の信頼性を含め
て性能が一定しない欠点がある。また、光フアイ
バの破断を防止するために、緩衝層を残した場合
は、内側の緩衝層のヤング率が低く一方外側の樹
脂層のヤング率が高くなり、自封作用が得られな
い。又、外側の樹脂層のヤング率を低くすると、
水圧が作用したときに樹脂が貫通孔から流出する
欠点がある。 A conventional sealed core wire drawing structure is shown in FIG. The conventional method for drawing out a sealed core wire is to provide a recess 3 in an airtight plate 1 made of metal or ceramics, which has a tapered side surface and a through hole 2 at the bottom with a hole diameter slightly larger than the outer diameter of the optical fiber core. , the coating of the optical fiber core 5 is completely removed to expose the optical fiber 4, and the optical fiber core 5 is drawn through the through hole 2 so that the core wire 4 is accommodated in the recess 3.
A curable resin is filled and solidified to form a sealed core wire drawing structure. In the conventional method described above, the coating layer of the optical fiber core wire is completely removed, so the optical fiber wire is easily broken and the work is very difficult. Furthermore, there is a drawback that performance, including long-term reliability, is not constant depending on the skill level of the operator. Furthermore, if a buffer layer is left in order to prevent the optical fiber from breaking, the Young's modulus of the inner buffer layer is low while the Young's modulus of the outer resin layer is high, making it impossible to obtain a self-sealing effect. Also, if the Young's modulus of the outer resin layer is lowered,
There is a drawback that resin flows out from the through holes when water pressure is applied.
本発明は上記従来方法の欠点を解消するため、
光フアイバの被覆除去部分を封止部材の弾性材部
分で覆うようにし、更に該封止部材の端部には硬
質材部分を設けて密封効果を高め、耐水性、気密
性に優れた心線引出方法を達成したものであつ
て、その構成は、気密性基材にテーパ孔を設ける
と共に該テーパ孔に密着嵌合する楔形封止部材を
用い、該封止部材の中央部を弾性材部分とする一
方、封止部材の端部を硬質材部分とし、光フアイ
バを該封止部材に貫通させて該光フアイバの被覆
除去部分を該封止部材で覆い、これらを一体に上
記基材のテーパ孔に挿入して該被覆除去部分を封
止部材によつて押圧密封することを特徴とする。 In order to eliminate the drawbacks of the above conventional methods, the present invention has the following features:
The removed portion of the optical fiber is covered with an elastic material portion of the sealing member, and a hard material portion is provided at the end of the sealing member to enhance the sealing effect, thereby creating a core fiber with excellent water resistance and airtightness. This method has achieved a pull-out method, and its configuration is to provide a tapered hole in an airtight base material, use a wedge-shaped sealing member that tightly fits into the tapered hole, and connect the center part of the sealing member with an elastic material part. On the other hand, the end of the sealing member is made of a hard material, the optical fiber is passed through the sealing member, and the portion of the optical fiber whose coating is removed is covered with the sealing member, and these are integrally attached to the base material. It is characterized in that it is inserted into a tapered hole and the covered removed portion is sealed by pressure with a sealing member.
以下に本発明を図面に示す実施例に基づいて詳
細に説明する。 The present invention will be described in detail below based on embodiments shown in the drawings.
第２図に３層構造の光フアイバ心線の断面図を
示す。光フアイバ素線２０の外周には１次被覆層
２１が設けられ、その上側にゴム等の緩衝層２２
が被覆され、更に最外層に熱硬化性樹脂等の２次
被覆層２３が設けられている。上記光フアイバを
密封心線引出する本発明の一実施例を第３図に示
す。金属あるいはセラミツクス、ガラスのような
気密性のある基材３０にテーパ孔３１が設けられ
る。該テーパ孔３１に第４図に示すような円錘台
形状の楔形封止部材３２が密着嵌合される。該封
止部材３２は上記テーパ孔３１と同様のテーパを
有し、その中央部３３はゴム等の弾性材部分であ
り、又封止部材３２の両端部３４ａ，３４ｂは樹
脂等の硬質材部分である。該硬質材部分３４ａ，
３４ｂは第４図ないし第６図に示すように該封止
部材３２を貫通する光フアイバ心線の軸心方向に
沿つて分割した形状とすることができる。。該封
止部材３２の軸心部分には光フアイバ素線３５、
あるいは緩衝層の外径より幾分孔径の小さい貫通
孔３６が設けられる。本実施例においては上記封
止部材３２を用い、光フアイバ３７の被覆を全
て、又は緩衝層を残して外側の２次被覆を除去し
た後、該光フアイバ３７を上記貫通孔３６を通じ
て封止部材３２に貫通させ、被覆除去部分を該封
止部材３２によつて覆う。次いでこれらを一体に
上記基材３０テーパ孔３１に挿入し、固定する。 FIG. 2 shows a cross-sectional view of a three-layer optical fiber core. A primary coating layer 21 is provided on the outer periphery of the optical fiber wire 20, and a buffer layer 22 of rubber or the like is provided above it.
A secondary coating layer 23 such as a thermosetting resin is provided as the outermost layer. FIG. 3 shows an embodiment of the present invention in which the optical fiber is drawn out in a sealed manner. A tapered hole 31 is provided in an airtight base material 30 such as metal, ceramics, or glass. A wedge-shaped sealing member 32 having a truncated cone shape as shown in FIG. 4 is tightly fitted into the tapered hole 31. The sealing member 32 has a taper similar to the taper hole 31, and its center portion 33 is made of an elastic material such as rubber, and both ends 34a and 34b of the sealing member 32 are made of a hard material such as resin. It is. The hard material portion 34a,
34b can have a shape divided along the axial direction of the optical fiber core passing through the sealing member 32, as shown in FIGS. 4 to 6. . At the axial center of the sealing member 32, an optical fiber wire 35,
Alternatively, a through hole 36 having a diameter somewhat smaller than the outer diameter of the buffer layer is provided. In this embodiment, the sealing member 32 is used, and after removing the entire coating of the optical fiber 37 or removing the outer secondary coating leaving behind the buffer layer, the optical fiber 37 is passed through the through hole 36 into the sealing member. 32, and the portion from which the coating is removed is covered by the sealing member 32. Next, these are inserted into the tapered hole 31 of the base material 30 and fixed.
本発明は又、第５図に示す密封構造を形成する
ようにしてもよい。第５図の実施例は第６図に示
す封止部材３２を用いるものであり、弾封止部材
３２においては光フアイバ心線３７の被覆層端部
が封止部材３２の弾性材部分３３に入り込んでい
る。上記本発明による心線引出部を構成するには
光フアイバ心線３７の所定部分の被覆を一定長さ
だけ除去し、少くとも２次被覆層を完全に除く、
この光フアイバ心線３７を封止部材３２に貫通さ
せ上記被覆除去部分を封止部材３２によつて覆
う。次いで細径側の硬質材部分３４ｂのうち分割
部分を封止部材先端に配設して、これを一体に基
材３０のテーパ孔３１に押し込む。続いて太径側
の硬質材部分３４ａのうち分割部分を封止部材先
端に押し込む。上記硬質材部分３４ａをテーパ孔
３１の奥に押し込むと、該硬質材部分３４ａは光
フアイバ心線を径方向から強く締めつけ更に弾性
材部分３３をテーパ孔３１の奥に押し込む。ここ
で弾性材部分３３は側面がテーパ状であるため
に、テーパ孔３１の壁面に強く押しつけられる。
と同時に押縮められ該弾性材部分３３に引き通し
てある光フアイバを強く締めつける。ゴム部品等
からなる弾性材部分はヤング率が低く、力を加え
ると容易に変形して、テーパの奥へ容易に押し込
まれる傾向をもつが、封止部材３２の細径側先端
には樹脂等によつて形成された硬質材部分３４ｂ
が設けられているので、これがストツパーの役目
を果し、弾性材部分３３がテーパ孔３１から押出
されるのを防止する。光フアイバ心線の被覆層を
完全に除去した場合は、弾性材部分３３が直接光
フアイバ素線表面に密着して密封効果を高める。
また、緩衝層を残した場合でも弾性材部分のヤン
グ率が高くないので、自封作用を発揮し、封止部
材３２がテーパ孔３１の奥に押し込まれたとき緩
衝層を介して光フアイバを強く締めつけるため緩
衝層のない場合と同様に気密を保持することがで
きる。このように、緩衝層があつても気密を保持
できるので、作業性の面からは２次被覆層のみを
除去すればよい。また、封止部材３２の両端又は
一方の端部に設けられる硬質材部分は光フアイバ
心線をしめつけて封止部材と光フアイバ心線の相
対的位置ずれを防止すると共に該硬質材部分自身
もテーパ孔の押し込まれると側壁から力を受けて
固定されるので光フアイバ心線の移動を一層防止
する。第７図に本発明の上記密封引出構造を用い
た応用例を示す。本応用例において、金属スリー
ブ４０の端部に円板状の金属バツクアツプ４１が
嵌着される。金属バツクアツプ４１の外周側面に
は金属スリーブ４０の内周面に圧接する固定用Ｏ
リング４２が装着されている。該金属バツクアツ
プ４１の前面にはゴム質のキヤツプ４３が設けら
れる、該キヤツプ４３は円板状をなし、その前面
に光フアイバを支えるノズル部４７が突設される
と共にその外周縁部にＯリング部４４が設けら
れ、該Ｏリング部４４によつて金属スリーブ４０
の端部内側に気密を保つて嵌合され、上記金属バ
ツクアツプ４１を封止する。更に該キヤツプ４３
前面のスリーブ端には金属リング４６を介して押
えリング４５がネジ止めされ、これら金属バツク
アツプ４１およびキヤツプ４４を一体に金属スリ
ーブ内側に締付固定する。上記金属バツクアツプ
４１の外周端部にはそれぞれ上記テーパ孔３１が
設けられ、該テーパ孔３１に上記封止部材３２が
挿入され、光フアイバ３７は該封止部材３２およ
びキヤツプ４３のノズル部４７を貫通して支持さ
れる（第８図参照）。上記応用例においては、封
止部材３２をテーパ孔３１に挿入した場合、太径
側の硬質材部分３４ａが若干テーパ孔３１からは
み出し、キヤツプ４３を嵌着した際、該硬質材部
分３４ａが押込まれて弾性材部分３３を圧縮する
ようにするとよい。この場合弾性材部分３３とバ
ツクアツプ４１のテーパ孔３１との界面の密着性
が高まり、常圧においても良好な気密が得られ
る。また、キヤツプ側から水圧を印加した場合
は、弾性材部分３３がさらに押し込まれて密着性
が高まり一層気密性が良くなる。更に第９図に本
発明に係る他の応用例を示す。本応用例において
は、金属スリーブ４０の拡大開口部に上記金属バ
ツクアツプ４１が嵌着され、更にその前端に筒状
の押え板４８が嵌着される。該押え板４８は上記
金属バツクアツプ４１と圧接する底面に光フアイ
バ３７の貫通する孔を具え、更に金属スリーブ４
０の内周面と圧接する外周面に気密を保つための
Ｏリング４９が設けられている。該押え板４８の
前方には更に押えナツト５０がネジ止めされてお
り、これら金属バツクアツプ４１および押え板４
８を金属スリーブ内側に一体に締付固定する。 The present invention may also be adapted to form a sealed structure as shown in FIG. The embodiment shown in FIG. 5 uses the sealing member 32 shown in FIG. I'm getting into it. In order to construct the above-mentioned core wire drawing portion according to the present invention, the coating of a predetermined portion of the optical fiber core wire 37 is removed by a certain length, and at least the secondary coating layer is completely removed.
This optical fiber core wire 37 is passed through the sealing member 32 and the portion where the coating is removed is covered with the sealing member 32. Next, the divided portion of the hard material portion 34b on the narrower diameter side is disposed at the tip of the sealing member, and the divided portion is pushed into the tapered hole 31 of the base material 30 as one piece. Subsequently, the divided portion of the hard material portion 34a on the larger diameter side is pushed into the tip of the sealing member. When the hard material portion 34a is pushed deep into the tapered hole 31, the hard material portion 34a strongly tightens the optical fiber from the radial direction, and further pushes the elastic material portion 33 deep into the tapered hole 31. Here, since the elastic material portion 33 has a tapered side surface, it is strongly pressed against the wall surface of the tapered hole 31.
At the same time, the optical fiber that is compressed and drawn through the elastic material portion 33 is strongly tightened. The elastic material part made of rubber parts etc. has a low Young's modulus and tends to deform easily when force is applied and is easily pushed into the depth of the taper. Hard material portion 34b formed by
Since this is provided, this serves as a stopper and prevents the elastic material portion 33 from being pushed out from the tapered hole 31. When the coating layer of the optical fiber core wire is completely removed, the elastic material portion 33 directly adheres to the surface of the optical fiber strand, increasing the sealing effect.
In addition, even if the buffer layer is left, the Young's modulus of the elastic material portion is not high, so it exhibits a self-sealing effect, and when the sealing member 32 is pushed deep into the tapered hole 31, it strongly pushes the optical fiber through the buffer layer. Since it is tightened, airtightness can be maintained in the same way as when there is no buffer layer. In this way, airtightness can be maintained even with the buffer layer, so in terms of workability, only the secondary coating layer needs to be removed. Further, the hard material portion provided at both ends or one end of the sealing member 32 tightens the optical fiber core to prevent relative positional shift between the sealing member and the optical fiber core, and the hard material portion itself When the tapered hole is pushed in, it receives force from the side wall and is fixed, thereby further preventing movement of the optical fiber. FIG. 7 shows an application example using the above sealed drawer structure of the present invention. In this application example, a disk-shaped metal backup 41 is fitted to the end of the metal sleeve 40. A fixing O is provided on the outer circumferential side of the metal backup 41 to press against the inner circumferential surface of the metal sleeve 40.
A ring 42 is attached. A rubber cap 43 is provided on the front surface of the metal backup 41. The cap 43 has a disk shape, and a nozzle portion 47 for supporting an optical fiber is protruded from the front surface of the cap 43, and an O-ring is attached to the outer peripheral edge of the cap 43. A portion 44 is provided, and the O-ring portion 44 connects the metal sleeve 40.
The metal back-up 41 is hermetically fitted inside the end of the metal back-up 41. Furthermore, the cap 43
A presser ring 45 is screwed to the front end of the sleeve via a metal ring 46, and the metal backup 41 and cap 44 are tightened and fixed together inside the metal sleeve. The tapered hole 31 is provided at the outer peripheral end of the metal backup 41, and the sealing member 32 is inserted into the tapered hole 31. It is supported through (see Figure 8). In the above application example, when the sealing member 32 is inserted into the tapered hole 31, the hard material portion 34a on the larger diameter side slightly protrudes from the tapered hole 31, and when the cap 43 is fitted, the hard material portion 34a is pushed in. It is preferable that the elastic material portion 33 be compressed. In this case, the adhesiveness of the interface between the elastic material portion 33 and the tapered hole 31 of the backup 41 increases, and good airtightness can be obtained even under normal pressure. Furthermore, when water pressure is applied from the cap side, the elastic material portion 33 is further pushed in, increasing the adhesion and further improving the airtightness. Further, FIG. 9 shows another application example of the present invention. In this application example, the metal backup 41 is fitted into the enlarged opening of the metal sleeve 40, and a cylindrical presser plate 48 is fitted to the front end thereof. The holding plate 48 has a hole through which the optical fiber 37 passes through the bottom surface which is in pressure contact with the metal backup 41, and further has a hole through which the optical fiber 37 passes.
An O-ring 49 for maintaining airtightness is provided on the outer circumferential surface which is in pressure contact with the inner circumferential surface of the 0. A presser nut 50 is further screwed in front of the presser plate 48, and these metal backups 41 and the presser plate 4
8 is integrally tightened and fixed inside the metal sleeve.
上記応用例において、テーパの傾きを1/20と
し、孔の長さ20mm、太い部分の直径４mmφ、細い
部分の直径３mmφとする一方、封止部材として上
記テーパ孔とほぼ同一寸法の樹脂質チツプを中間
の適当な位置を約３mm除去し、この部分に内径
0.75mmφの孔をもつ外径４mmφ、長さ４mmのゴム
部品を嵌め込み、0.9mmφの金属丸棒を引き通し
て第９図に示すようにセツトした。又金属バツク
アツプの外径35mmφの外周面に溝の深さ2.5mm溝
巾約４mmのＯリング用溝を２段設け、ここにＧ―
30のＯリングを付設して金属バツクアツプを気密
に固定する。次に押え板側からHeガスを10気圧
の圧力下で印加し、反対側でHeガスのリーク速
度を測定した。これを６ケのテーパ孔について先
に述べたのと同様の寸法で実験した。この結果平
均1.7×10-6atm・cc／secの値が得られた。一
方、押え板と孔のないバツクアツプを用いて、同
様の実験をした場合、Heガスのリーク速度は、
実測の結果およそ１×10-6atm・cc／secであつ
た。 In the above application example, the inclination of the taper is 1/20, the length of the hole is 20 mm, the diameter of the thick part is 4 mmφ, and the diameter of the thin part is 3 mmφ, and a resin chip with almost the same dimensions as the taper hole is used as a sealing member. Remove about 3mm from an appropriate position in the middle, and add the inner diameter to this part.
A rubber part with an outer diameter of 4 mmφ and a length of 4 mm having a hole of 0.75 mmφ was fitted, and a metal round rod of 0.9 mmφ was pulled through to set it as shown in FIG. In addition, two O-ring grooves with a groove depth of 2.5 mm and a groove width of approximately 4 mm are provided on the outer circumferential surface of the metal backup with an outer diameter of 35 mmφ, and a G-
Attach a 30 O-ring to secure the metal backup airtight. Next, He gas was applied under a pressure of 10 atm from the holding plate side, and the leak rate of He gas was measured on the opposite side. This was tested with dimensions similar to those described above for six tapered holes. As a result, an average value of 1.7×10 −6 atm·cc/sec was obtained. On the other hand, if a similar experiment was conducted using a holding plate and a backup without holes, the leak rate of He gas would be:
The actual measurement result was approximately 1×10 -6 atm·cc/sec.
従つて本発明の気密方法による孔１ケ所あたり
のHeリーク速度はHeガス10Kg／cm2を印加した場
合、１×10-7atm・cc／secとなり、金属バツク
アツプ周辺のＯリング気密よりおよそ10倍良好で
あることが伴つた。 Therefore, the He leak rate per hole according to the airtight method of the present invention is 1×10 -7 atm・cc/sec when 10 kg/cm 2 of He gas is applied, which is approximately 10% faster than the O-ring airtightness around the metal backup. It was accompanied by twice as good results.
以上説明したように、本発明の方法においては
封止部材が側面にテーパーを有するため、テーパ
孔に押し込まれると弾性材部分が側壁に強く押し
付けられる。また同時に中心方向にも力が発生し
て中に引き通した光フアイバを締めつけるため、
気密性が良く、この気密性は、弾性材部分が強く
押し込まれるほど大きくなる自己封止性を示すた
め、高い圧力差のあるところに光フアイバを気密
に保持して、引き通す場合に大きな利点を有す
る。また、弾性材部分の少なくとも先端側に硬質
材部分を配置した場合は、ゴムの押出しが防止さ
れるため、大きな自己封止作用を有する低いヤン
グ率の弾性材を使うことができるので、気密性が
一層向上する。 As explained above, in the method of the present invention, since the sealing member has a tapered side surface, when the sealing member is pushed into the tapered hole, the elastic material portion is strongly pressed against the side wall. At the same time, a force is generated in the center direction, tightening the optical fiber that has been drawn inside.
It has good airtightness, and this airtightness shows a self-sealing property that increases as the elastic material part is pushed harder, so it is a great advantage when holding an optical fiber airtight and pulling it through a place where there is a high pressure difference. has. In addition, if a hard material part is placed at least on the tip side of the elastic material part, the extrusion of the rubber is prevented, so an elastic material with a low Young's modulus that has a large self-sealing effect can be used, so the airtightness can be improved. further improves.
以上、本発明による光フアイバ密封引出方法
は、高気密が要求される海底光ケーブルの中継器
筐体からの光フアイバ引出部あるいはケーブル相
互接続部に好適であり、これらの密封接続作業を
容易にするなど実用上大きな利点を有する。 As described above, the method for pulling out optical fibers according to the present invention is suitable for pulling out optical fibers from repeater casings of submarine optical cables or interconnecting cables, which require high airtightness, and facilitates the sealed connection work. It has great practical advantages.
第１図は従来の密封心線引出構造の断面図、第
２図は光フアイバの断面図、第３図および第５図
は本発明による密封心線引出構造の断面図、第４
図および第６図は本発明に係る封止部材の外観
図、第７図、第８図、第９図は海底光ケーブル成
端部へ本発明による密封心線引出部を組込んだ場
合の構造を示す断面説明図である。
図面中、３０は基材、３１はテーパ孔、３２は
封止部材、３３は弾性材部分、３４ａ，３４ｂは
硬質材部分、３５は光フアイバ素線、３６は貫通
孔、３７は光フアイバ心線、４０は金属スリー
ブ、４１は金属バツクアツプ、４２はＯリング、
４３はキヤツプ、４４はＯリング部、４５は押え
リング、４６は金属リング、４７はノズル部、４
８は押え板、４９はＯリング、５０は押えナツト
である。
FIG. 1 is a sectional view of a conventional sealed fiber drawing structure, FIG. 2 is a sectional view of an optical fiber, FIGS. 3 and 5 are sectional views of a sealed fiber drawing structure according to the present invention, and FIG.
6 and 6 are external views of the sealing member according to the present invention, and FIGS. 7, 8, and 9 show the structure when the sealed core wire pull-out section according to the present invention is incorporated into the submarine optical cable termination section. FIG. In the drawing, 30 is a base material, 31 is a tapered hole, 32 is a sealing member, 33 is an elastic material part, 34a, 34b are hard material parts, 35 is an optical fiber wire, 36 is a through hole, and 37 is an optical fiber core. 40 is a metal sleeve, 41 is a metal backup, 42 is an O-ring,
43 is a cap, 44 is an O-ring part, 45 is a holding ring, 46 is a metal ring, 47 is a nozzle part, 4
8 is a holding plate, 49 is an O-ring, and 50 is a holding nut.
Claims (1)
ーパ孔に密着嵌合する楔形封止部材を用い、該封
止部材の中央部を弾性部分とする一方、封止部材
の端部を硬質材部分とし、光フアイバを該封止部
材に貫通させて、該光フアイバの被覆除去部分を
該封止部材で覆い、これらを一体に上記基材のテ
ーパ孔に挿入して該被覆除去部分を封止部材によ
つて押圧密封することを特徴とする光フアイバ密
封引出方法。 ２ 特許請求の範囲第１項において、光フアイバ
の被覆除去部分が上記封止部材の弾性材部分に埋
設されることを特徴とする光フアイバ密封引出方
法。 ３ 特許請求の範囲第１項において、上記封止部
材の一端に設けた硬質材部分又は両端に設けた硬
質材部分のうちの一方を光フアイバの被覆層に接
着又は融着させて一体化することを特徴とする光
フアイバ密封引出方法。[Scope of Claims] 1. A tapered hole is provided in an airtight base material, and a wedge-shaped sealing member that tightly fits into the tapered hole is used. The end of the optical fiber is made of a hard material, the optical fiber is passed through the sealing member, the portion of the optical fiber from which the coating is removed is covered with the sealing member, and these are inserted into the tapered hole of the base material as one body. A method for sealing and drawing out an optical fiber, characterized in that the portion from which the coating is removed is press-sealed with a sealing member. 2. A method for sealing and drawing out an optical fiber according to claim 1, characterized in that a portion of the optical fiber from which the coating is removed is embedded in an elastic material portion of the sealing member. 3. In claim 1, one of the hard material portions provided at one end of the sealing member or the hard material portions provided at both ends is bonded or fused to the coating layer of the optical fiber to be integrated. A method for drawing out an optical fiber in a sealed manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3509282A JPS58152203A (en) | 1982-03-08 | 1982-03-08 | Method for sealing and leading out optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3509282A JPS58152203A (en) | 1982-03-08 | 1982-03-08 | Method for sealing and leading out optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58152203A JPS58152203A (en) | 1983-09-09 |
| JPS6153688B2 true JPS6153688B2 (en) | 1986-11-19 |
Family
ID=12432307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3509282A Granted JPS58152203A (en) | 1982-03-08 | 1982-03-08 | Method for sealing and leading out optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58152203A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6156307A (en) * | 1984-08-28 | 1986-03-22 | Hitachi Ltd | Closed case for inserting optical parts |
| JP2016099573A (en) * | 2014-11-25 | 2016-05-30 | 株式会社フジクラ | Method for manufacturing optical module |
-
1982
- 1982-03-08 JP JP3509282A patent/JPS58152203A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58152203A (en) | 1983-09-09 |
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