JPS6148682B2 - - Google Patents
Info
- Publication number
- JPS6148682B2 JPS6148682B2 JP17174980A JP17174980A JPS6148682B2 JP S6148682 B2 JPS6148682 B2 JP S6148682B2 JP 17174980 A JP17174980 A JP 17174980A JP 17174980 A JP17174980 A JP 17174980A JP S6148682 B2 JPS6148682 B2 JP S6148682B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- rubber elastic
- elastic body
- core wire
- ring
- 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
- 238000004891 communication Methods 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000013307 optical fiber Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008961 swelling Effects 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
- G02B6/4439—Auxiliary devices
-
- 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
Description
【発明の詳細な説明】
本発明は通信ケーブルのガスダム部の構造に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a gas dam portion of a communication cable.
第１図は通信ケーブルの途中に作成される樹脂
形ガスダムの一実施例を示している。１はプラス
チツク外被をもつ通信ケーブル、２はその外被、
３は外被２を除去して露出したPE絶縁心線
（銅）、４は外被接続用主スリーブ、５はスリーブ
と外被の接続部、６はスリーブ内に充てんした熱
硬化性の樹脂である。６はスリーブ内に充てんし
た熱硬化性の樹脂である。この構造において、気
密性向上のため心線３のPE被覆の一部をはぎ取
つて銅を露出させることもある。樹脂６中にある
外被（PE）と樹脂との気密性改善のために、た
とえばアルミテープに接着材をラミネートしたア
ルミラミネートテープを外被端末に巻き（接着材
面を下側）、接着材とPE外被を加熱接着し、外被
２と樹脂６の接着性を向上する例もある。 FIG. 1 shows an embodiment of a resin-type gas dam created in the middle of a communication cable. 1 is a communication cable with a plastic jacket, 2 is the jacket,
3 is the PE insulated core wire (copper) exposed by removing the outer sheath 2, 4 is the main sleeve for connecting the outer sheath, 5 is the connection between the sleeve and the outer sheath, and 6 is the thermosetting resin filled in the sleeve. It is. 6 is a thermosetting resin filled in the sleeve. In this structure, in order to improve airtightness, a portion of the PE coating of the core wire 3 may be stripped off to expose the copper. In order to improve the airtightness between the outer sheath (PE) in the resin 6 and the resin, for example, wrap an aluminum laminate tape, which is made by laminating an adhesive onto aluminum tape, around the end of the outer sheath (with the adhesive side facing down). There is also an example of heat bonding a PE jacket and a PE jacket to improve the adhesion between the jacket 2 and the resin 6.
しかしこのガスダムはヒートサイクルを受ける
と、ケーブルと樹脂または金属と樹脂との線膨張
係数の違い等により、接着界面に応力が生長し
て、スリーブ４の内面、外被２の表面に沿つてガ
ス漏れが生じる危険が多く、長期信頼性に欠けて
いた。また心線が光フアイバの場合には、光フア
イバは機械的に弱く、ヒートサイクルを受ける光
フアイバ心線にマイクロベンデングが生じ、光伝
送損失が増加する傾向があり、著しいときは心線
の断線が生じることもある。 However, when this gas dam is subjected to a heat cycle, stress grows at the adhesive interface due to differences in linear expansion coefficients between the cable and the resin, or between the metal and the resin, causing gas to flow along the inner surface of the sleeve 4 and the surface of the jacket 2. There was a high risk of leakage, and long-term reliability was lacking. In addition, when the core wire is an optical fiber, the optical fiber is mechanically weak, and microbending occurs in the optical fiber core wire subjected to heat cycles, which tends to increase optical transmission loss. Disconnection may also occur.
さらにガスダム部と一般のケーブル接続点が同
一マンホール中にある場合には、マンホール内の
輻湊の原因ともなつていた。 Furthermore, if the gas dam part and the general cable connection point are located in the same manhole, this may cause congestion within the manhole.
本発明はこれらの欠点を除くため、心線径より
もやや小さい貫通孔をもつノズル付き円板状ゴム
部品を用い、ケーブル心線を前記貫通孔を通し、
外部に心線を引き出し、このノズル付き円板状ゴ
ム部品と、ケーブル外被端に接続された円筒スリ
ーブとを気密に接続して高信頼のダムを構成した
ものである。以下図面により本発明を詳細に説明
する。 In order to eliminate these drawbacks, the present invention uses a disk-shaped rubber component with a nozzle having a through hole that is slightly smaller than the diameter of the cable core, and passes the cable core through the through hole.
A highly reliable dam is constructed by drawing out the core wire to the outside and airtightly connecting this disc-shaped rubber component with a nozzle to a cylindrical sleeve connected to the end of the cable jacket. The present invention will be explained in detail below with reference to the drawings.
第２図は光フアイバケーブルのガスダム部の一
実施例の縦断面図で、２はケーブル外被、７は金
属またはプラスチツク製端面板、７―１はＯリン
グ溝、７―２はＯリング、８はケーブルのテンシ
ヨンメンバ、９はテンシヨンメンバを引き留め、
端面板に固定する固定金具、１０はケーブル心線
（光フアイバ心線または絶縁被覆銅線）、１１はゴ
ム弾性体部品支持棒、１２は円板状のゴム弾性体
部品、１２―１はゴム弾性体部品のノズル部、１
２―２はゴム弾性体部品の心線用貫通孔、１２―
３はゴム弾性体部品の支持棒用貫通孔、１２―４
はゴム弾性体部品のリング状突起部、１３は金属
リング、１４は金属またはプラスチツクの気密保
持用スリーブ、１４―１は気密保持用スリーブの
ゴム弾性体部品リング状突起部用の装着溝、１４
―２は連結用ボルト、１５はゴム弾性体部品バツ
クアツプ金具、１５―１はＯリング溝、１５―２
はＯリン、１５―３はケーブル心線通過孔であ
る。 FIG. 2 is a vertical cross-sectional view of an embodiment of the gas dam part of an optical fiber cable, in which 2 is a cable jacket, 7 is a metal or plastic end plate, 7-1 is an O-ring groove, 7-2 is an O-ring, 8 is the tension member of the cable, 9 is the tension member that holds the tension member,
Fixing fittings to be fixed to the end plate, 10 is a cable core wire (optical fiber core wire or insulated copper wire), 11 is a rubber elastic body component support rod, 12 is a disk-shaped rubber elastic body component, 12-1 is rubber Nozzle part of elastic body part, 1
2-2 is a through hole for the core wire of the rubber elastic body part, 12-
3 is a through hole for a support rod of rubber elastic body parts, 12-4
13 is a metal ring; 14 is a metal or plastic air-tight sleeve; 14-1 is a mounting groove for the ring-shaped projection of the rubber elastic body component in the air-tight sleeve; 14
-2 is a connecting bolt, 15 is a back-up metal fitting for rubber elastic body parts, 15-1 is an O-ring groove, 15-2
15-3 is an O-ring, and 15-3 is a cable passing hole.
また第３図および第４図は、第２図を組み立て
る際に使用する部品の詳細図で第３図は、ゴム弾
性体部品１２の平面図、第４図はゴム弾性体部品
１２の縦断面図である。第２図に示すガスダム部
を組み立てるには、ケーブル外被２の表面に端面
板（金属またはプラスチツク）７をモールド法等
によつて気密的、機械的に接続・固定する。 3 and 4 are detailed views of the parts used when assembling the part shown in FIG. 2, FIG. 3 is a plan view of the rubber elastic body part 12, and FIG. It is a diagram. To assemble the gas dam section shown in FIG. 2, an end plate (metal or plastic) 7 is airtightly and mechanically connected and fixed to the surface of the cable jacket 2 by a molding method or the like.
次にケーブルのテンシヨンメンバ８を金属固定
金具９の中心孔に通して端末部をエポキシ樹脂等
で固定し、固定金具９の他端を端面板７にボルト
にて固定する。このテンシヨンメンバを固定する
ことにより、以後の製作工程中中および完成後、
ダム部に振動が加わつても、テンシヨンメンバが
ぶれてケーブル心線１０に傷を与えることはな
い。次にゴム弾性体部品支持棒１１を端面板７に
固定する。 Next, the tension member 8 of the cable is passed through the center hole of the metal fixture 9, and its terminal end is fixed with epoxy resin or the like, and the other end of the fixture 9 is fixed to the end plate 7 with bolts. By fixing this tension member, during the subsequent manufacturing process and after completion,
Even if vibration is applied to the dam part, the tension member will not shake and damage the cable core 10. Next, the rubber elastic component support rod 11 is fixed to the end plate 7.
一方、ゴム弾性体部品１２の一側面には、ノズ
ル１２―１を複数本有しており、それぞれのノズ
ルにはケーブル心線１０の数と等しい数の心線１
０の外径より若干小径の貫通孔１２―２があらか
じめ開けてある。またゴム弾性体部品１１用に
は、ノズルに前記支持棒１１の外径よりも若干小
径の貫通孔１２―３があらかじめ開けてある。ケ
ーブル心線１０と前記支持棒１１をゴム弾性体部
品１２内の貫通孔１２―２，１２―３に引き通す
には次のように行う。 On the other hand, one side of the rubber elastic body component 12 has a plurality of nozzles 12-1, and each nozzle has a number of core wires equal to the number of cable core wires 10.
A through hole 12-2 having a diameter slightly smaller than the outer diameter of the hole 12-2 is pre-drilled. Further, for the rubber elastic body component 11, a through hole 12-3 having a diameter slightly smaller than the outer diameter of the support rod 11 is pre-drilled in the nozzle. The cable core wire 10 and the support rod 11 are passed through the through holes 12-2 and 12-3 in the rubber elastic component 12 in the following manner.
まず金属リング１３を、たとえばリング状突起
部１２―４を折り曲げて装着する。次に支持棒１
１、心線１０より若干大きい内径を持つガイドス
リーブを、それぞれの該当する孔１２―２，１２
―３に挿入する。続いてノズル部をケーブル側に
して、支持棒１１および心線１０を前記ガイドス
リーブの孔に通して外部に引き出す。部品１２の
位置を所定の位置にセツトした後、前記ガイドス
リーブを引き取る。 First, the metal ring 13 is attached by bending the ring-shaped protrusion 12-4, for example. Next, support rod 1
1. Insert a guide sleeve with an inner diameter slightly larger than the core wire 10 into each corresponding hole 12-2, 12.
- Insert into 3. Subsequently, with the nozzle portion facing the cable side, the support rod 11 and the core wire 10 are passed through the hole of the guide sleeve and pulled out to the outside. After setting the part 12 in a predetermined position, the guide sleeve is removed.
以上によつて支持棒１１と各心線１０は、ゴム
材の収縮力によつて密着する。 As described above, the support rod 11 and each core wire 10 are brought into close contact with each other by the contraction force of the rubber material.
次に端面板７のＯリング溝７―１にＯリング７
―２をセツトし、あらかじめケーブル１に通して
おいた気密保持用スリーブ１４をゴム弾性体部品
１２に向けて引きもどし、気密保持用スリーブの
ゴム弾性体部品のリング状突起部装着溝１４―１
に、ゴム弾性体部品のング状突起部１２―４がお
さまる状態にセツトする。 Next, insert the O-ring 7 into the O-ring groove 7-1 of the end plate 7.
-2, then pull back the airtight sleeve 14, which has been passed through the cable 1 in advance, toward the rubber elastic component 12, and insert the ring-shaped protrusion attachment groove 14-1 of the rubber elastic component of the airtight sleeve.
Then, set the rubber elastic body part so that the ring-shaped protrusion 12-4 is seated therein.
前記気密保持用スリーブ１４を端面板７にボル
トで固定した後、ゴム弾性体部品バツクアツプ金
具１５―１にＯリング１５―２をセツトし、前記
バツクアツプ金具１５の心線通過孔１５―３に、
あらかじめ心線１０を通過させておいて、バツク
アツプ金具と気密保持用スリーブ１４のフランジ
とをボルト１４―２の締付けで連結する。このボ
ルト１４―２の締付け力により前記ゴム弾性体部
品リング状突起部１２―４は、気密保持スリーブ
１４およびバツクアツプ金具１５に押えられ、Ｏ
リングと同じ効果を発揮する。 After fixing the airtight sleeve 14 to the end plate 7 with bolts, set the O-ring 15-2 on the rubber elastic component back-up fitting 15-1, and insert the O-ring 15-2 into the core wire passing hole 15-3 of the back-up fitting 15.
The core wire 10 is passed through in advance, and the backup fitting and the flange of the airtight sleeve 14 are connected by tightening bolts 14-2. Due to the tightening force of this bolt 14-2, the rubber elastic body component ring-shaped protrusion 12-4 is pressed by the airtight retaining sleeve 14 and the back-up fitting 15, and the
It has the same effect as a ring.
このガスダム部は気密保持部にゴム弾性体を使
用しており、加圧側（ケーブル内にガスが充てん
されている）には、ノズル１２―１を有している
で、心線１０および支持棒１１とノズル間には、
ゴムの収縮力とともにガス圧による自己封止作用
が働らくので、界面からのガス漏洩の危険性は全
くなく、長期にわたつて安定した気密部が得られ
る。 This gas dam part uses a rubber elastic body for the airtight maintenance part, and has a nozzle 12-1 on the pressure side (the cable is filled with gas), and the core wire 10 and the support rod. Between 11 and the nozzle,
Since the self-sealing effect of the gas pressure works together with the contractile force of the rubber, there is no risk of gas leakage from the interface, and a stable airtight area can be obtained over a long period of time.
またゴム弾性体部品１２と気密保持用スリーブ
１４間は、金属リング１３の使用により、前記リ
ング状突起部１２―４にも加圧側から自己封止作
用が働き、長期的に安定した気密部を得ることが
できる。 Furthermore, by using the metal ring 13 between the rubber elastic body component 12 and the airtight sleeve 14, a self-sealing effect also acts on the ring-shaped protrusion 12-4 from the pressurizing side, creating a long-term stable airtight area. Obtainable.
なお心線１０が光フアイバ心線の場合にも、ゴ
ム弾性体に光フアイバが覆われているので、低温
（−30℃）においても光伝送損失の増加を生ずる
ことはない。 Even when the core wire 10 is an optical fiber core wire, since the optical fiber is covered with a rubber elastic body, no increase in optical transmission loss occurs even at low temperatures (-30 DEG C.).
第２図の実施例は加圧部が片側にある場合で、
局内ガスダム部および引き上げケーブルガスダム
部（地下線路と架空線路とを区分するガスダム
部）に使用できる。ところで通信ケーブル線路に
は両側からガス圧が加わる場合もある。第５図は
その場合の実施例でゴム弾性体の両側にノズル１
２―１を有する部品を使用したときの一実施例の
縦断面図であり、１６はバツクアツプ金具であ
る。 The embodiment shown in Fig. 2 is a case where the pressurizing part is on one side.
It can be used for internal gas dams and lifting cable gas dams (gas dams that separate underground lines from overhead lines). By the way, gas pressure may be applied from both sides of the communication cable line. Figure 5 shows an example in which nozzles 1 are installed on both sides of the rubber elastic body.
2-1 is a vertical cross-sectional view of an embodiment when using parts having numeral 2-1, and 16 is a back-up metal fitting.
また第６図は第５図を組み立てる際に使用する
ゴム弾性体部品１２の縦断面図である。このガス
ダム部はゴム弾性体部品の両側が加圧されてお
り、何れか一方のガス圧力が大気に開放されて
も、自封作用によりケーブル心線１０および支持
棒１１とゴム弾性体の界面間の気密を保持するこ
とができる。またゴムのガス圧によるふくらみを
押えるためのバツクアツプ金具１６を用いる。 Further, FIG. 6 is a longitudinal sectional view of the rubber elastic body component 12 used when assembling FIG. 5. In this gas dam part, both sides of the rubber elastic body parts are pressurized, and even if the gas pressure on either side is released to the atmosphere, the self-sealing effect will cause the interface between the cable core 10 and support rod 11 and the rubber elastic body to Airtightness can be maintained. In addition, a back-up fitting 16 is used to suppress the swelling of the rubber due to gas pressure.
第５図に示す実施例はガスダム部の両側が加圧
されている場合で、長距離線路のガス区界および
中継器きよう体にスタケーブルを導入する部分に
おけるガスダムに使用できる。 The embodiment shown in FIG. 5 is a case where both sides of the gas dam part are pressurized, and can be used in a gas dam in a long-distance line where a star cable is introduced into a gas section or a repeater wall.
以上説明したように本発明の通信ケーブルのガ
スダム構造は、ケーブル心線の気密保持部に加圧
側にノズルを有し、そのノズルの中心に心線外径
よりも小径の貫通孔を有するゴム弾性体部品が主
構成部品であり、このゴム弾性体部品の貫通孔に
心線が密着・固定されているので、加圧側では心
線とゴム弾性体部品間の界面に、常にゴムの収縮
力とガス圧による自己封止作用が働く。またゴム
弾性体部品と気密保持用スリーブ間の界面気密
は、ゴム弾性体にＯリング状突起部を設けた部品
としているので、Ｏリングと同じ効果がある。 As explained above, the gas dam structure of the communication cable of the present invention has a nozzle on the pressurizing side in the airtight holding part of the cable core, and a rubber elastic gas dam having a through hole with a diameter smaller than the outer diameter of the core in the center of the nozzle. The body part is the main component, and the core wire is tightly attached and fixed to the through hole of this rubber elastic body part, so on the pressure side, the contractile force of the rubber is always applied to the interface between the core wire and the rubber elastic body part. A self-sealing effect occurs due to gas pressure. Further, since the interface airtightness between the rubber elastic body component and the air-tightness maintaining sleeve is achieved by using a component in which an O-ring-shaped protrusion is provided on the rubber elastic body, it has the same effect as an O-ring.
このように本発明にガスダム構造は加圧側でゴ
ム弾性体部品に自己封止作用で働くよう気密保持
部を構成しているので、信頼性の高いガスダム部
となつている。 As described above, the gas dam structure of the present invention has a gas-tight retaining portion that acts as a self-sealing effect on the rubber elastic component on the pressurizing side, resulting in a highly reliable gas dam portion.
また特に光フアイバ心線のように機械的に弱い
心線でもゴム弾性体部品内では局部的に応力が集
中することなく、低温時においても光伝送損失の
増加は全くない。 Furthermore, even in the case of a mechanically weak core wire such as an optical fiber core wire, stress does not locally concentrate within the rubber elastic body component, and there is no increase in optical transmission loss at all even at low temperatures.
さらに加圧によるゴム弾性体部品のふくらみ、
防止用のバツクアツプ金具の片面を使つて、ボル
トによりケーブル外被接続スリーブと接続でき、
ケーブルのガスダム部と外被接続部とを一体化す
ることができる。 Furthermore, the bulge of the rubber elastic body parts due to pressurization,
It can be connected to the cable jacket connection sleeve with bolts using one side of the back-up fitting for prevention.
The gas dam part and the jacket connection part of the cable can be integrated.
また中継器きよう体とケーブルとの接続にも本
発明のガスダム構造を有する長尺ケーブルを使う
ことにより、従来、本ケーブルから分岐して中継
器きよう体と接続していたダム付きスタブケーブ
ルが不要となる。このように本発明のガスダム構
造はケーブル線路の経済化およびマンール内の輻
湊化対策としても大きな利点がある。 In addition, by using the long cable with the gas dam structure of the present invention for connecting the repeater case and the cable, a stub cable with a dam, which was conventionally branched from the main cable and connected to the repeater case, can be used. becomes unnecessary. As described above, the gas dam structure of the present invention has great advantages in terms of economical use of cable lines and as a countermeasure against congestion within manholes.
第１図は従来の通信ケーブルガスダム部の断面
図、第２図は本発明の通信ケーブルガスダム部の
一実施例の縦断面図、第３図は第２図で使用する
ゴム弾性体部品の平面図、第４図はゴム弾性体部
品の断面図、第５図はノルを両側面に有するゴム
弾性体部品を構成品とした通信ケーブルガスダム
部の一実施例の縦断面図、第６図は第５図で使用
するゴム弾性体部品の断面図である。
１…ケーブル、２…ケーブル外被、３…PE絶
縁心線（銅）、４…外被接続用主スリーブ、５…
スリーブと外被の接続部、６…熱硬化性樹脂、７
…端面板、７―１…Ｏリング溝、７―２…Ｏリン
グ、８…テンシヨンメンバ、９…固定金具、１０
…ケーブル心線、１１…支持棒、１２…ゴム弾性
体部品、１２―１…ゴム弾性体ノズル部、１２―
２…心線用貫通孔、１２―３…支持棒用貫通孔、
１２―４…ゴム弾性体部品Ｏリング状突起部、１
３…金属リング、１４…気密保持用スリーブ、１
４―１…Ｏリング突起部装着溝、１４―２…ボル
ト、１５…ゴム弾性体部品バツクアツプ金具、１
５―１…Ｏリング溝、１５―２…Ｏリング、１５
―３…心線通過孔、１６…バツクアツプ金具。
Fig. 1 is a sectional view of a conventional communication cable gas dam section, Fig. 2 is a vertical sectional view of an embodiment of the communication cable gas dam section of the present invention, and Fig. 3 is a rubber elastic body component used in Fig. 2. 4 is a cross-sectional view of a rubber elastic body part, and FIG. 5 is a vertical cross-sectional view of an embodiment of a communication cable gas dam part comprising a rubber elastic body part having knobs on both sides. FIG. 6 is a sectional view of the rubber elastic body component used in FIG. 1... Cable, 2... Cable jacket, 3... PE insulated core wire (copper), 4... Main sleeve for jacket connection, 5...
Connection part between sleeve and outer cover, 6...Thermosetting resin, 7
…End plate, 7-1…O-ring groove, 7-2…O-ring, 8…Tension member, 9…Fixing metal fitting, 10
...Cable core wire, 11...Support rod, 12...Rubber elastic body parts, 12-1...Rubber elastic body nozzle part, 12-
2...Through hole for core wire, 12-3...Through hole for support rod,
12-4...Rubber elastic body part O-ring shaped protrusion, 1
3...Metal ring, 14...Airtight sleeve, 1
4-1... O-ring protrusion mounting groove, 14-2... Bolt, 15... Rubber elastic body parts backup fitting, 1
5-1...O-ring groove, 15-2...O-ring, 15
-3... Core wire passing hole, 16... Backup fitting.
Claims (1)
個のノズルが片面または両面に一体化して設けら
れ、このノズルと前記円板状部材を貫通した孔を
設け、かつこの孔の径はそれに装着されるケーブ
ル心線外径よりも小径のものとし、また前記円板
状部材の外周にはＯリング状突起を形成した気密
部品を用い、ケーブル内心線を前記貫通孔を通し
て外部に引き出し、この気密部品をケーブル外被
に気密接続されたスリーブと気密的、機械的に一
体として組み立てられることを特徴とする通信ケ
ーブルのガスダム構造。1 A disc-shaped member made of an elastic material such as rubber has a plurality of nozzles integrated on one or both sides, and a hole is provided that passes through the nozzle and the disc-shaped member, and the diameter of this hole is has a smaller diameter than the outer diameter of the cable core wire attached to it, and an airtight component having an O-ring-shaped protrusion is used on the outer periphery of the disc-shaped member, and the inner cable core wire is drawn out to the outside through the through hole. A gas dam structure for a communication cable, characterized in that this airtight component is airtightly and mechanically assembled integrally with a sleeve that is hermetically connected to the cable jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17174980A JPS5794705A (en) | 1980-12-05 | 1980-12-05 | Gas-dam structure of communication cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17174980A JPS5794705A (en) | 1980-12-05 | 1980-12-05 | Gas-dam structure of communication cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5794705A JPS5794705A (en) | 1982-06-12 |
| JPS6148682B2 true JPS6148682B2 (en) | 1986-10-25 |
Family
ID=15928973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17174980A Granted JPS5794705A (en) | 1980-12-05 | 1980-12-05 | Gas-dam structure of communication cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5794705A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH075447Y2 (en) * | 1986-05-09 | 1995-02-08 | 株式会社フジクラ | Mechanical closure for optical cable |
| US5231687A (en) * | 1990-06-04 | 1993-07-27 | Bicc Plc | Termination system for optical fibres |
-
1980
- 1980-12-05 JP JP17174980A patent/JPS5794705A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5794705A (en) | 1982-06-12 |
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