JPS58152204A - Waterproof terminating part of optical fiber cable - Google Patents
Waterproof terminating part of optical fiber cableInfo
- Publication number
- JPS58152204A JPS58152204A JP57035052A JP3505282A JPS58152204A JP S58152204 A JPS58152204 A JP S58152204A JP 57035052 A JP57035052 A JP 57035052A JP 3505282 A JP3505282 A JP 3505282A JP S58152204 A JPS58152204 A JP S58152204A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- optical fiber
- waterproof
- sheet
- rubber sheet
- 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.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 28
- 229920001971 elastomer Polymers 0.000 claims abstract description 61
- 239000005060 rubber Substances 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011162 core material Substances 0.000 claims 3
- 238000005096 rolling process Methods 0.000 claims 1
- 239000004589 rubber sealant Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 abstract description 8
- 239000011347 resin Substances 0.000 abstract description 8
- 239000003566 sealing material Substances 0.000 abstract description 7
- 229920000181 Ethylene propylene rubber Polymers 0.000 abstract description 3
- 239000004636 vulcanized rubber Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 208000017574 dry cough Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004078 waterproofing Methods 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)
- Insulated Conductors (AREA)
- Insulating Bodies (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、多心線を収容した光フアイバケーブルの防水
成端部に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproof termination section for an optical fiber cable containing multi-core wires.
通信ケーブル線路には、外部の温度変化によって生じた
水滴が流入したり、人為的にケーブルが切断されたとき
水がケーブル内を流れるのを防ぐため、地下と架空の区
境いやケーブル接続部などに防水壁が設けられることが
多いつ
従来、この種の防水壁は、ケーブルの中間部またはケー
ブル熾末の成端部にポリウレタンやエポキシ等の樹脂を
用いて作製されている。To prevent water droplets generated due to external temperature changes from flowing into communication cable lines, and to prevent water from flowing through the cables when the cables are cut by humans, there are special measures such as underground and aerial separations and cable connections. Conventionally, this type of waterproof wall is made by using a resin such as polyurethane or epoxy at the intermediate portion of the cable or at the end of the cable.
第１図は、エポキシ樹脂を用いた従来の防水成端部の一
例の断面図であって、ｌは光フアイバケーブル、２は光
ファイバ６巌、δはダムスリーブ、４は工ｌキシ樹脂、
６はダムスリーブとケーブル外被の接続部である。この
ように樹脂を用いて作る成熾部は、樹脂が硬化する前の
液体であるうちに注入すれば、光フアイバ心線の開−に
流れ込んで固着するため、容易に作製できる特徴がある
が、心線数が多心になればなるほど、６纏間隔が小さく
なるので、その間−に樹脂を光てんするのが困蝋となり
、気泡や空咳が生じて、防水壁としての機能を得るのが
むずかしいという問題があった。FIG. 1 is a cross-sectional view of an example of a conventional waterproof termination part using epoxy resin, where l is an optical fiber cable, 2 is a 6-strand optical fiber, δ is a dam sleeve, 4 is an epoxy resin,
6 is a connection portion between the dam sleeve and the cable jacket. The growth part made using resin in this way has the characteristic that if it is injected while the resin is a liquid before hardening, it will flow into the opening of the optical fiber core and become fixed, so it can be easily manufactured. As the number of fibers increases, the interval between the six strands becomes smaller, so it becomes difficult to inject the resin between them, causing air bubbles and dry coughs, making it difficult to obtain the function of a waterproof wall. The problem was that it was difficult.
光７アイバナープルの場合は、特に光ファイバ心願がｍ
械的に弱いので、樹脂硬化時や温度変化によって生じる
大きな伸縮によって、急影暢を受けるという間伽があっ
た。In the case of Hikari 7 eye banner pull, especially optical fiber is m
Because it is mechanically weak, it has suffered from sudden damage due to large expansion and contraction caused by resin curing or temperature changes.
これらの欠点を補うべく様々な考案がなされているが、
樹脂は、注入状−や硬化条件など微妙な遣いによって、
作製した製品の性能に大きな差異が生じ易いという本質
的な問題を有するので、安定して信憤性のある防水−が
得られないという欠点があった。Various ideas have been made to compensate for these shortcomings, but
The resin is made by delicately controlling the injection form and curing conditions.
This has the inherent problem that the performance of the manufactured products tends to vary greatly, and therefore has the disadvantage that stable and reliable waterproofing cannot be obtained.
本発明は、これらの欠点を解決するため、樹脂を一切用
いずに、あらかじめ均一に作られた簡単な構造のゴム部
品を用いて防水壁を構成したもので、その目的は、多心
線を収容した光フアイバケーブルにおいて、光ファイバ
心線に聰影Ｗを与えることなく、均一で信頓性の高い防
水成端部を得ることにある。以下、図面により本発明の
詳細な説明する。In order to solve these drawbacks, the present invention constructs a waterproof wall using rubber parts with a simple structure made uniformly in advance without using any resin. To obtain a uniform and highly reliable waterproof termination part in a housed optical fiber cable without giving a shadow W to the optical fiber core wire. Hereinafter, the present invention will be explained in detail with reference to the drawings.
＠２図（ａ）は、本発明による光フアイバケーブルの防
水成端部の実施例の側断面図、ｔａｇ図（ｂ）は嬉２図
（〜のムーム′における＃面図であって６はゴムシート
、７はシール材、８は気密ゴム部品、９は締付はリング
、ｌＯは８俸、１１は押え金具、１２は０リングである
。@2 Figure (a) is a side sectional view of an embodiment of the waterproof termination part of an optical fiber cable according to the present invention, and tag figure (b) is a # side view of Figure 2 (~), and 6 is a A rubber sheet, 7 a sealing material, 8 an airtight rubber part, 9 a tightening ring, 10 an 8-ring, 11 a holding fitting, and 12 an 0 ring.
１８図はｆｓ８図のゴムシート６の部品図であって、６
−１は光７アイパ心線収納孔、６−２はスリットである
。Figure 18 is a parts diagram of the rubber sheet 6 in Figure fs8.
-1 is an optical 7-IPA core wire storage hole, and 6-2 is a slit.
ゴムシート６は、エチレンプロピレンゴムなどの加硫ゴ
ムが適しており、防水機能および成端部構成上ゴム硬度
は８０〜６０（ＪＩＳム）、寸法は、厚さ２〜８１１１
１．輻２０〜４０Ｍ、長さ２０〜１００−ｉ度の大きさ
が適当である。ゴムシート６に設ける光フアイバ心線収
納孔６−１は、光ファイバ心−と同じか、もしくは若干
小さな内径の孔であり、スリット６−８は光ファイバ心
願収納孔に挿入するための切り込みで、通常は開口しな
いようにする。ゴムシート６の趨末部は、ゴムシートを
丸めて端面を重ね合せたとき段差が生じないようバイア
スカットにする。The rubber sheet 6 is suitably made of vulcanized rubber such as ethylene propylene rubber, and has a rubber hardness of 80 to 60 (JIS) and a thickness of 2 to 8111 mm due to its waterproof function and termination structure.
1. A radius of 20 to 40 m and a length of 20 to 100 degrees are suitable. The optical fiber storage hole 6-1 provided in the rubber sheet 6 has an inner diameter that is the same as or slightly smaller than the optical fiber core, and the slit 6-8 is a cut for inserting the optical fiber into the optical fiber storage hole. , normally not open. The end portion of the rubber sheet 6 is bias-cut so that no level difference occurs when the rubber sheet is rolled up and the end surfaces are overlapped.
次に１１！４図は気密ゴム部品８の断ｌ１ｆｉ図であり
、８−１−ノズル、ｓ−ｇは貫通孔、８−８はＯリング
部である。気密ゴム部品８は、エチレンプロピレンゴム
等の加硫ゴムで、ゴムシート６よりも軟らかいゴム材が
適している。貫ｄ孔８−２の内径はゴムシートを必賛数
だけ巻き付けたときの外径よりも若干小さくシ、貫通孔
の長さく片方のノズルの増から反対−のノズルの端まで
の長さ）はゴムシート６の幅と同じかもしくは若干短く
する。Next, Figures 11 and 4 are cross-sectional views of the airtight rubber component 8, where 8-1 is a nozzle, sg is a through hole, and 8-8 is an O-ring portion. The airtight rubber component 8 is preferably made of vulcanized rubber such as ethylene propylene rubber, which is softer than the rubber sheet 6. The inner diameter of the through-hole 8-2 is slightly smaller than the outer diameter when the rubber sheet is wrapped the required number of times, and the length of the through-hole is the length from the end of one nozzle to the end of the opposite nozzle). is the same as or slightly shorter than the width of the rubber sheet 6.
次に第２図の成増部の組立手順を説明すると、次のとお
りである。Next, the assembly procedure of the growth section shown in FIG. 2 will be explained as follows.
（］）！ｌ！８１Ｗに示すゴムシートのスリット６−２
が開口するように、ゴムシートを折り曲げながら光７ア
イパ心−［１心ごとに、光７アイパ心−収納孔に挿入す
る。(])! l! Slit 6-2 of the rubber sheet shown in 81W
While bending the rubber sheet so that it opens, insert the optical 7-eyeper cores one by one into the optical 7-eyeper core storage hole.
（２〕 所定の心４ｉｉ！１Ｗｌｉを挿入したゴムシ
ートをスリット６−ｇが内Ｍ４になるようにして８俸ｌ
Ｏに巻き付ける。この際、ゴムシートの１＃面にシール
材７を縦沿えして巻き付ける。シート材７には、粘着性
の軟らかいゴム材を用いる。このようにすれば、ゴムシ
ートのスリットは閉じる方向に巻き付けることになり、
一方、シール材はゴムシート間に間隙が生じるのを防い
で、水密性の良い密封部を得ることができる。(2) Rub the rubber sheet into which the specified core 4ii!1Wli is inserted so that the slit 6-g is M4 inside, and roll it into 8 pieces.
Wrap it around O. At this time, the sealing material 7 is vertically wrapped around the 1# side of the rubber sheet. The sheet material 7 is made of a soft adhesive rubber material. In this way, the slit of the rubber sheet will be wrapped in the closing direction,
On the other hand, the sealing material can prevent gaps from forming between the rubber sheets and provide a sealed portion with good watertightness.
（３）所定の心線数について、前記（１） ＃ １２）
項を終了した後、治具上用いて気密ゴム部品８の貫通孔
８−２を拡大し、前記（１） ＪＪＩで巻き付けたゴム
シートの外周に気密ゴム部品８を被せ、拡大していた治
具を抜き取る。貫通孔８−２の内径が巻き付けたゴムシ
ート外径よりも小さいので、ゴムシートに密着させるこ
とができる・
（４）気密ゴム部品８のノズル８−１の外周を締付はリ
ング９で締め付ける。締付はリング９は、ゴムまたはプ
ラスチック、金属のいずれでもよい０
（６） 気密ゴム部品のＯリング部８−８に押え金具
１１を取り付けて固定する。以上により、光フアイバ心
線の周辺はゴムシートで密封し、その外周部は気密ゴム
部品で密封した成１１ｉｉｌｓが得られる。(3) For the specified number of cores, see (1) #12) above.
After finishing the process, the through hole 8-2 of the airtight rubber part 8 is enlarged using a jig, and the airtight rubber part 8 is placed over the outer periphery of the rubber sheet wrapped with JJI in the above (1). Remove the tool. Since the inner diameter of the through hole 8-2 is smaller than the outer diameter of the rubber sheet wrapped around it, it can be tightly attached to the rubber sheet. (4) Tighten the outer periphery of the nozzle 8-1 of the airtight rubber part 8 with the ring 9 . For tightening, the ring 9 may be made of rubber, plastic, or metal. (6) Attach and fix the presser metal fitting 11 to the O-ring portion 8-8 of the airtight rubber component. Through the above steps, a structure 11 is obtained in which the periphery of the optical fiber core is sealed with a rubber sheet and the outer periphery thereof is sealed with an airtight rubber component.
次に＠２図の応用例について説明する。Next, an example of application of Figure @2 will be explained.
＠６図は債数本の光ファイバ８編を一つにまとめたテー
プ心線に対して本発明を実施した例で、６１２図（ｂ）
に相当する部分を示した断面図である。@Figure 6 is an example in which the present invention is applied to a ribbon fiber made up of 8 optical fibers from several bonds, and Figure 612 (b)
FIG.
嬉６図＆：わいて１８はテープ心−１ｌ鴫は角形穴付き
ゴムシートである。６１６図は角形穴付きゴムシートの
部品図であって、１４−１は角形のテープ心線収容孔で
ある。テープ心線収容孔１４−１はテープ心線とほぼ同
形状とし、テープ心線を収容する場合は１１１５図に示
すように、テープ心１ｉ１１にシール材ｆ：巻き付ける
か、もしくはあらかじめテープ心線収容孔内にシール材
を挿入しておいて、テープ心線を収容する。Figure 6 &: Waite 18 is a tape core - 1L is a rubber sheet with square holes. Fig. 616 is a parts diagram of a rubber sheet with square holes, and 14-1 is a square tape core receiving hole. The tape core accommodating hole 14-1 has almost the same shape as the tape core, and when accommodating the tape core, as shown in Fig. 1115, the tape core 1i11 is wrapped with a sealing material f, or the tape core is housed in advance. A sealing material is inserted into the hole to accommodate the tape core wire.
このようにすれば、テープ６巌とゴムシート間に間隙が
生じない。なお光フアイバケーブルに心４Ｉ数が種実あ
る場合は、前記ゴムシート６または角形穴付きゴムシー
）１４の巻付は層数を増減し・、・１″翳
て対処することができる。この場合は、めくらのゴムシ
ー）を用いたり、ゴムシート巻付は時の直径に合わせて
気密ゴム部品８の外径の異なるものを用意すればよい。In this way, no gap is created between the tape 6 and the rubber sheet. In addition, if the optical fiber cable has a certain number of cores (4I), the wrapping of the rubber sheet 6 or rubber sheet with square holes 14 can be done by increasing or decreasing the number of layers by 1". In this case, , a blind rubber sheath), or use airtight rubber parts 8 with different outer diameters to match the diameter of the rubber sheet.
以上説明したように、本発明の光フアイバケーブルの防
水成端部は、次に列挙する利点がある。As explained above, the waterproof termination part of the optical fiber cable of the present invention has the following advantages.
（１） 光フアイバ心線に対して軟質のゴムシートを
適用し、ゴムシート幅も２０〜４Ｑｓｓ一度であり、軟
らかく光フアイバ心線を把持しているので、悪影曽を与
えない。(1) A soft rubber sheet is applied to the optical fiber, and the width of the rubber sheet is 20 to 4 Qss, and it grips the optical fiber softly, so it does not cause any negative effects.
（２）コムシートの光フアイバ心線収納孔にスリットが
設けであるので、光フアイバ心線を挿入するのに、１本
１本通す必要がなく、スリットから挾み込むだけで光フ
ァイバ心−を把持でき１作業性が良い。(2) Since the optical fiber core storage hole of the comb sheet is provided with a slit, there is no need to pass each fiber core through the optical fiber cores one by one. 1. Good workability.
（３） スリットが内周となるようにゴムシートを巻
き付けるので、スリットが開かず、またゴムシート間に
は粘着性のシール材を挿入しているので、間隙が生ぜず
、信頓性の良い密封部が得られる。(3) Since the rubber sheet is wrapped so that the slit is on the inner periphery, the slit will not open, and an adhesive sealant is inserted between the rubber sheets, so there will be no gaps and good reliability. A seal is obtained.
（４）あらかじめ成形品として作られたゴムシートと気
密ゴム部品を水密用部品として使用しているので、簡単
な組立作業で性能に”バラツキ°。(4) Since rubber sheets and airtight rubber parts made in advance as molded products are used as watertight parts, there is ``variation'' in performance with simple assembly work.
が少なく、高信額な防水成端部を得ることができる。With this method, it is possible to obtain a waterproof termination part with low cost and high reliability.
＃１１図は従来の防水成端部の断面図、１１４２図［４
）は本発明による光７アイノ（ケーブル防水成端部の＊
ｍ岡の側断＠図、
＠２図（ｂ）は４８図（ａ）のムーＡ′ニおける断ｍＷ
、＃！８図は第２図に用いるゴムシートの部品の斜視図
、
第４図は第２図に用いる気密ゴム部品の断面図、錦５図
はテープ心線を収容した光フアイバケーブル防水成端部
の実施岡における断面図、４＠６図は第６図に用いる角
形穴付きゴムシートの部品の１ｌｆ３ｉ図である。
１・・・光７フイバケーブル、２・・・光７ア４ ／’
（心Ｍ、δ・・・ダムスリーブ、４・・・エポキシ樹脂
、５・・・ケーブル外破縁続部、６−ゴムシー）、８−
１・・・光７アイパ心ｌＩ収納孔、６−２・・・スリッ
ト、７・・・シール材、８・・珍気密ゴム部品、８−１
・・・ノズル、８−２・・・［＋１１孔、８−Ｊｌ・・
・Ｏリング部、９・・・締付はリング、ｌＯ・・・８俸
、１１・・・押え金具、１２・・・Ｏリング、１８・・
・テープ心線、１４・・・角形穴付きゴムシー）、１４
−１・・・テープ心線収容孔。
特許出願人 日本電信電話公株
第１図
Δ
第２図
（ｂ
第３図
りγＳ４ｒン１Figure #11 is a cross-sectional view of the conventional waterproof termination part, Figure 1142 [4
) is the Hikari 7 Aino (* of the cable waterproof termination part) according to the present invention.
Side section of m-oka @Figure 2 (b) is the cross-section mW at Mu A'ni in Figure 48 (a)
, #! Figure 8 is a perspective view of the rubber sheet parts used in Figure 2, Figure 4 is a sectional view of the airtight rubber parts used in Figure 2, and Figure 5 is a waterproof termination part of the optical fiber cable containing the tape core. The cross-sectional view at the actual location, Figure 4@6, is a 1lf3i diagram of the part of the rubber sheet with square holes used in Figure 6. 1... Optical 7 fiber cable, 2... Optical 7a4/'
(Core M, δ...Dam sleeve, 4...Epoxy resin, 5...Cable outer broken edge connection, 6-Rubber seam), 8-
1... Hikari 7 eye per core lI storage hole, 6-2... Slit, 7... Sealing material, 8... Unusual airtight rubber parts, 8-1
...Nozzle, 8-2... [+11 hole, 8-Jl...
・O-ring part, 9... Tightening ring, lO... 8 pieces, 11... Holding metal fitting, 12... O-ring, 18...
・Tape core wire, 14...Rubber seam with square hole), 14
-1...Tape cable accommodation hole. Patent applicant Nippon Telegraph and Telephone Public Corporation Figure 1 Δ Figure 2 (b Figure 3 γS4rn1
Claims (1)
径があり、かつ丸めることにより形成される円周の上に
１１１Ｆ９ＴのスリットがあるＴＩＬ濾孔を、僕数個設
けた平板状のゴムシートに、光フアイバ心線を挿入し、
前記ゴムシートの両面に粘着性の軟質ゴムシール材をＪ
ｆ沿えして、断面円形の芯材に巻き付け、その外ＩＩｌ
＆：、、＃紀ゴムシートよりも軟質のゴム材で作られ、
かつチューブ状のノズルが付いたゴム部品を被せ、前記
ゴム部品ノズルの外周から金属等の締付はリングを用い
て円周上均等に締め付けることにより、光フアイバ心線
間の水密性１するように構成したことを特徴とする光フ
アイバケーブルの防水成４ｇ。L A flat rubber sheet with an inner diameter that is the same as or slightly smaller than the diameter of the optical fiber core, and has several TIL filter holes with 111F9T slits on the circumference formed by rolling it. Insert the optical fiber into the
Apply adhesive soft rubber sealant to both sides of the rubber sheet.
Wrap it around a core material with a circular cross section along f, and then
＆：、、#Made of softer rubber material than Ki rubber sheet,
In addition, a rubber part with a tube-shaped nozzle is covered, and a ring is used to tighten metal etc. from the outer periphery of the rubber part nozzle evenly on the circumference, so as to maintain watertightness between the optical fiber cores. A 4g waterproof optical fiber cable characterized by having the following structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57035052A JPS58152204A (en) | 1982-03-08 | 1982-03-08 | Waterproof terminating part of optical fiber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57035052A JPS58152204A (en) | 1982-03-08 | 1982-03-08 | Waterproof terminating part of optical fiber cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58152204A true JPS58152204A (en) | 1983-09-09 |
| JPS6248802B2 JPS6248802B2 (en) | 1987-10-15 |
Family
ID=12431262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57035052A Granted JPS58152204A (en) | 1982-03-08 | 1982-03-08 | Waterproof terminating part of optical fiber cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58152204A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6190102A (en) * | 1984-10-08 | 1986-05-08 | Showa Electric Wire & Cable Co Ltd | Terminal fixation structure of multicore optical fiber cable |
-
1982
- 1982-03-08 JP JP57035052A patent/JPS58152204A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6190102A (en) * | 1984-10-08 | 1986-05-08 | Showa Electric Wire & Cable Co Ltd | Terminal fixation structure of multicore optical fiber cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6248802B2 (en) | 1987-10-15 |
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