JPH0430690B2 - - Google Patents
Info
- Publication number
- JPH0430690B2 JPH0430690B2 JP60272924A JP27292485A JPH0430690B2 JP H0430690 B2 JPH0430690 B2 JP H0430690B2 JP 60272924 A JP60272924 A JP 60272924A JP 27292485 A JP27292485 A JP 27292485A JP H0430690 B2 JPH0430690 B2 JP H0430690B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- ring
- metal sheath
- corrugated metal
- view
- 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 - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 31
- 239000002985 plastic film Substances 0.000 claims description 13
- 229920006255 plastic film Polymers 0.000 claims description 13
- 229920000098 polyolefin Polymers 0.000 claims description 12
- 239000002655 kraft paper Substances 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920001083 polybutene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 239000000123 paper Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229920000306 polymethylpentene Polymers 0.000 description 2
- 239000011116 polymethylpentene Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003000 extruded plastic Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はポリオレフイン系のプラスチツクフイ
ルムを少くとも一部に有する絶縁層を具えたOF
ケーブルの改良に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention provides an OFO having an insulating layer having at least a portion of a polyolefin plastic film.
Concerning cable improvements.
（従来技術）
第９図は従来のOFケーブルの概要説明図で、
同図イは縦断面図、同図ロは横断面図を示す。(Prior art) Figure 9 is a schematic diagram of a conventional OF cable.
Figure A shows a longitudinal cross-sectional view, and Figure B shows a cross-sectional view.
図面において、１は内部に絶縁油通路１ａを形
成した銅撚線、アルミニウム撚線より成るケーブ
ル導体、２はポリエチレンフイルム、ポリプロピ
レンフイルム、ポリブテンフイルムの一つ又はこ
れらの複数の組合せより成るプラスチツクフイル
ムを巻回するか、このようなポリオレフイン系の
プラスチツクフイルムの両面ないし片面にクラフ
ト紙を積層一体化した複合絶縁紙を巻回するか、
あるいはポリオレフイン系プラスチツクフイルム
とクラフト紙を交互に巻回して構成した絶縁層で
ある。このようなポリオレフイン系のプラスチツ
クフイルムを少くとも一部に有する絶縁層２を具
えたケーブルコアｃの外側には、アルミニウム、
ステンレンス等に連続した螺旋状の波付を施した
波付金属シース３１が設けられており、さらにそ
の外周上にはポリエチレン、ポリ塩化ビニル等の
プラスチツク材料の押出しによる防食層（図示せ
ず）が施されている。 In the drawing, 1 is a cable conductor made of copper stranded wire or aluminum stranded wire with an insulating oil passage 1a formed therein, and 2 is a plastic film made of one of polyethylene film, polypropylene film, polybutene film, or a combination of these. Or, wrap a composite insulating paper made by laminating kraft paper on both sides or one side of such a polyolefin plastic film.
Alternatively, it is an insulating layer formed by alternately winding polyolefin plastic film and kraft paper. On the outside of the cable core c, which is provided with an insulating layer 2 having at least a part of such a polyolefin plastic film, aluminum,
A corrugated metal sheath 31 made of stainless steel or the like is provided with continuous spiral corrugations, and an anti-corrosion layer (not shown) made of extruded plastic material such as polyethylene or polyvinyl chloride is further provided on the outer periphery of the sheath 31. It has been subjected.
（解決しようとする問題点）
上述した従来のらせん状波付金属シース３１を
もつたOFケーブルでは、同一横断面上の必らず
１カ所において、波付の谷部がケーブルコア１と
接している。従つてケーブルの端末で接続銅管と
金属シース３１を鉛工又は溶接接続する場合、そ
の熱により絶縁層２のプラスチツクフイルムが溶
融する等のダメージを受けることが多かつた。(Problem to be Solved) In the OF cable having the conventional spirally corrugated metal sheath 31 described above, the corrugated troughs are in contact with the cable core 1 at one location on the same cross section. There is. Therefore, when connecting the connecting copper pipe and the metal sheath 31 at the end of the cable using lead work or welding, the heat often causes damage such as melting of the plastic film of the insulating layer 2.
従つて、このような問題点を解決する対策とし
て、主として次の二つの方策がとられてきた。 Therefore, the following two measures have been mainly taken to solve these problems.
その一つは、絶縁層の外周に近い例えば２〜６
mm程度を耐鉛工材料、例えばクラフト紙、フロロ
エチレンプロピレン共重合体フイルムの両面にク
ラフト紙を積層一体化した複合絶縁紙あるいはポ
リメチルペンテンフイルムの両面にクラフト紙を
積層一体化した複合絶縁紙を巻回して普通鉛工に
よるスポツト的な熱の影響をさけるか、又は接続
を予想される部分の絶縁層にこのような耐鉛工材
料を使用する等の方法がとられてきた。 One of them is close to the outer periphery of the insulating layer, for example 2 to 6
lead-resistant materials such as kraft paper, composite insulating paper made by laminating kraft paper on both sides of a fluoroethylene propylene copolymer film, or composite insulating paper made by laminating kraft paper on both sides of a polymethylpentene film. Methods have been taken, such as winding the wire to avoid the effect of spot heat caused by ordinary lead construction, or using such lead-resistant materials for the insulating layer in areas where connections are expected.
その２は、接続部の鉛工を例えば融点100℃内
外の低温ハンダを用いるとか、金属シースとケー
ブルコアの間に給油槽より絶縁油を流して冷却し
ながら普通鉛工するいわゆる油流し鉛工を用いる
等の方法が行なわれてきた。 The second method is to use low-temperature solder with a melting point of around 100 degrees Celsius for the lead work at the connection part, or to do ordinary lead work by pouring insulating oil from an oil tank between the metal sheath and the cable core while cooling it. Methods such as using .
さらにもう一つの技術的流れとして洞道内で火
気を使用しないですませるように、パツキング、
Ｏリング等シールするいわゆる無鉛工接続を採用
する方法もある。 Another technological trend is packing, so as not to use fire inside the cave.
There is also a method of employing a so-called lead-free connection that seals with an O-ring or the like.
しかし、上記いずれの方法にも次のような問題
点が存在する。 However, all of the above methods have the following problems.
まず、耐鉛工材料を使用する方法は、本来絶縁
技術的（電気強度、ε×tanδ）にあるいは経済的
に使用したいポリオレフイン系プラスチツクフイ
ルムの使用がおさえられて、ε×tanδの劣るクラ
フト紙層を多く設ける必要があつたり、高価なフ
ロロエチレンプロピレン共重合体やポリメチルペ
ンテンを用いた複合絶縁紙を採用せざるを得ない
という問題がある。あるいは異種のポリオレフイ
ンプラスチツクスを同一ケーブルの絶縁層内で混
用することによる紙巻条件に違い、熱膨張やテー
プのすべりやすさの違いといつた“なじみの悪
さ”や、資材がふえることによる管理、作業性の
悪さといつた問題もある。 First, the method of using lead-resistant materials eliminates the need to use polyolefin plastic film, which is originally desirable for insulation technology (electrical strength, ε x tan δ) or economical, and uses a kraft paper layer with inferior ε x tan δ. There are problems in that it is necessary to provide a large amount of insulating paper, and it is necessary to use a composite insulating paper using expensive fluoroethylene propylene copolymer or polymethylpentene. Or, when different types of polyolefin plastics are mixed in the insulation layer of the same cable, there are differences in paper wrapping conditions, differences in thermal expansion and slipperiness of the tape, and other "incompatibility", and management due to an increase in the number of materials. There are also problems with poor workability.
又低温ハンダを用いたり油流し鉛工を用いる方
法は鉛工作業が非常に難しく作業性が悪く、さら
に又無鉛工接続は、金属シースの波付が連続螺旋
であるためＯリングを締付けるのに常に谷と山を
一周するため、完全な気密を期し難く、作業も困
難で、複雑な接続構造となるという問題点があ
る。 In addition, methods using low-temperature solder or oil-flow lead work are extremely difficult and have poor workability.Furthermore, lead-free connections have a continuous spiral corrugation on the metal sheath, making it difficult to tighten the O-ring. Since it always goes around valleys and peaks, it is difficult to ensure complete airtightness, and the work is difficult, resulting in a complicated connection structure.
（問題点を解決するための手段）
本発明は上述の問題を解消した改良されたOF
ケーブルを提供するもので、その特徴は、ポリオ
レフイン系のプラスチツクフイルムを少くとも一
部に有する絶縁層を具えたケーブルコアの外側に
リング状波付金属シースを設けて成ることにあ
る。(Means for solving the problems) The present invention provides an improved OF that solves the above problems.
The cable is characterized in that it comprises a ring-shaped corrugated metal sheath on the outside of a cable core having an insulating layer at least partially comprising a polyolefin plastic film.
（実施例）
第１図は本発明のOFケーブルの実施例の縦断
面図、第２図はその横断面図を示し、同図イは第
１図X1−X1における断面図、同図ロは第１図X2
−X2断面図である。(Example) Fig. 1 is a longitudinal cross-sectional view of an embodiment of the OF cable of the present invention, Fig. 2 is a cross-sectional view thereof, and A is a cross-sectional view taken along line X 1 - X 1 in Fig. 1; B is Figure 1X 2
-X2 sectional view.
本発明においては、内部に絶縁油通路１ａをも
つたケーブル導体１のポリオレフイン系のプラス
チツクフイルムを少くとも一部に有する絶縁層２
を形成したケーブルゴアｃを具えていることは第
９図に示す従来のOFケーブルと同様である。し
かし、上記ケーブルコアｃの外側に設けた波付金
属シース３は連続した螺旋状波付ではなく、コア
軸と直角方向の谷部３ｂ又は山部３ａの一つ一つ
独立したリング状波付金属シース３である。 In the present invention, an insulating layer 2 having at least a portion of a polyolefin plastic film of a cable conductor 1 having an insulating oil passage 1a therein.
This cable is similar to the conventional OF cable shown in FIG. However, the corrugated metal sheath 3 provided on the outside of the cable core c is not a continuous spiral corrugation, but has ring-shaped corrugations that are independent of each valley part 3b or peak part 3a in the direction perpendicular to the core axis. It is a metal sheath 3.
第３図は上記リング状波付金属シース３を形成
する回転リングの１例の正面図イ及び側面図で、
図面に示すように１周して波付のピツチに相当す
るＰだけ離れる１端開放の回転リング５を内径Ｄ
を大から小に変えながら複数個軸方向に配置し、
これら回転リング５の回転速度と、該回転リング
５が１回転するうちに金属シースをＰだけ進める
ことを同期をとつて行なうことにより金属シース
にリング状波付を施すことができる。このような
方法がリング状波付金属シース３をうる最も普通
の方法である。もう一つのリング状波付方法とし
ては、金属シースの谷部を形成する箇所に強力な
電磁力を、作用させて金属シースに流れる渦電流
が作る反発磁場との間の反発力を利用するいわゆ
る「電磁力を利用した機械加工法」がある。金属
シースがOFケーブルで多用されるアルミシース
の場合には、渦電流の流れる金属シースの導電率
が高いために反発磁界を強められて特に好適であ
る。この方法では、非接触に局所にリング状に、
加工力を及すことがきわめて容易であるので本願
のリング状波付加工には特に好ましいものである
が、特に限定されるものではない。 FIG. 3 is a front view and a side view of an example of a rotating ring forming the ring-shaped corrugated metal sheath 3,
As shown in the drawing, a rotary ring 5 with one end open and separated by P corresponding to the pitch of the corrugations after one revolution is set to have an inner diameter of D.
Arrange multiple pieces in the axial direction while changing from large to small.
By synchronizing the rotational speed of the rotating ring 5 and advancing the metal sheath by P during one rotation of the rotating ring 5, it is possible to form a ring-shaped corrugation on the metal sheath. This method is the most common method for obtaining the ring-shaped corrugated metal sheath 3. Another method of ring-shaped corrugation is to apply a strong electromagnetic force to the portions of the metal sheath that form the valleys, and utilize the repulsive force between the eddy current flowing in the metal sheath and the repulsive magnetic field. There is a ``machining method that uses electromagnetic force.'' When the metal sheath is an aluminum sheath, which is often used in OF cables, it is particularly suitable because the repulsion magnetic field can be strengthened because the metal sheath has high conductivity through which eddy currents flow. In this method, a non-contact local ring-shaped
Since it is extremely easy to apply processing force, it is particularly preferred for the ring-shaped corrugation process of the present application, but it is not particularly limited.
第５図ないし第８図は上述の本発明のリング状
波付金属シース３をもつたOFケーブルの接続部
の縦断面図である。 5 to 8 are longitudinal cross-sectional views of the connecting portion of the OF cable having the ring-shaped corrugated metal sheath 3 of the present invention described above.
第５図はリング状波付金属シース３の一つある
いは二つ以上の山部３ａの頂上で、その全円周に
わたつて接続箱の接続用銅管１１の端部縮径部１
１ａとスポツト溶接（電気、アーク、TIG、プラ
ズマ、レーザー等）又はスポツト鉛工１２を行な
つて気密を保持したのち、その上にエポキシ樹脂
の補強層１３を施して十分な機械的強度を持たせ
るようにしたものである。 FIG. 5 shows the top of one or more peaks 3a of the ring-shaped corrugated metal sheath 3, and the end diameter reduced portion 1 of the connection copper pipe 11 of the connection box over the entire circumference.
1a and spot welding (electric, arc, TIG, plasma, laser, etc.) or spot lead work 12 to maintain airtightness, and then a reinforcing layer 13 of epoxy resin is applied thereon to ensure sufficient mechanical strength. It was designed to allow
第６図はリング状波付金属シース３の端部に拡
管用治具を挿し込んで１山ないし２山分を拡管し
て偏平３ｃにし、この偏平部３ｃと接続用銅管１
１の端部縮径部１１ａとの間に前記同様にスポツ
ト溶接又はスポツト鉛工１２を行なつて気密を保
持したのち、その上にエポシキ樹脂による補強層
１３を設けたものである。 FIG. 6 shows a pipe expanding jig inserted into the end of the ring-shaped corrugated metal sheath 3 to expand the pipe by one or two peaks to form a flattened part 3c and the connecting copper pipe 1.
After spot welding or spot lead work 12 is carried out in the same manner as described above to maintain airtightness, a reinforcing layer 13 made of epoxy resin is provided thereon.
又第７図は無鉛工接続部の１例で、リング状波
付金属シース３の谷部３ｂにＯリング１４を嵌挿
し、この部分に接続用銅管１０の端部縮径部１１
ａを覆せて気密を保持し、その上にエポキシ樹脂
による補強層１３を設けて機械的に保護したもの
である。 FIG. 7 shows an example of a lead-free joint, in which an O-ring 14 is inserted into the valley part 3b of the ring-shaped corrugated metal sheath 3, and the reduced diameter part 11 of the connecting copper pipe 10 is inserted into this part.
A can be covered to maintain airtightness, and a reinforcing layer 13 made of epoxy resin is provided thereon for mechanical protection.
さらに第８図は無鉛工接続部の他の例で、リン
グ状波付金属シース３の山部３ａを少し平らに
し、この部分にＯリング１４を嵌挿し、前記同様
この部分に接続用銅管１１の端部縮径部１１ａを
覆せて気密を保持し、その上にエポキシ樹脂によ
る補強層１３を設けたものである。 Furthermore, FIG. 8 shows another example of a lead-free connection part, in which the peak part 3a of the ring-shaped corrugated metal sheath 3 is slightly flattened, an O-ring 14 is inserted into this part, and a copper pipe for connection is inserted into this part as before. The reduced diameter portion 11a of the end portion 11 can be overturned to maintain airtightness, and a reinforcing layer 13 made of epoxy resin is provided thereon.
なお、上記第７図及び第８図に示す無鉛工接続
部において、Ｏリング１４の数は１個に限定され
るものでなく、必要に応じてその個数を増加する
ことができる。 Note that in the lead-free joint shown in FIGS. 7 and 8, the number of O-rings 14 is not limited to one, and the number can be increased as necessary.
又一般にOFケーブルの接続時にはケーブルの
切断端に空気が存在することから、接続箱を覆せ
た後にケーブルの端部から真空引きして空気を除
去した後にケーブル内に絶縁油を注入する。この
場合、従来の連続した螺旋状波付金属シースでは
ケーブルコアと金属シースの間の空隙が連続して
いるから上記の真空引きも容易でかつ確実に実施
できた。しかし、本発明のリング状波付金属シー
スでは、１山の波付を越してケーブル側に進んだ
空気が奥に残存すると、接続箱からの真空引きで
は十分に脱気するのに長時間を要する場合があ
る。 Generally, when connecting an OF cable, air is present at the cut end of the cable, so after the connection box is overturned, a vacuum is drawn from the end of the cable to remove air, and then insulating oil is injected into the cable. In this case, in the conventional continuous spirally corrugated metal sheath, since the gap between the cable core and the metal sheath is continuous, the above-mentioned evacuation can be carried out easily and reliably. However, in the ring-shaped corrugated metal sheath of the present invention, if the air that has passed through one corrugation to the cable side remains deep inside, it takes a long time to fully degas it by vacuuming from the junction box. It may be necessary.
第４図はこのような場合の対策を施したケーブ
ル１例の横断面図で、リング状波付金属シース３
の谷部３ｂの内面に長さ方向に連続した凹部１５
が設けてあり、これにより従来と同様に容易にか
つ確実に真空引き脱気を実施することが可能とな
る。 Figure 4 is a cross-sectional view of an example of a cable that takes measures against such cases, and shows a ring-shaped corrugated metal sheath 3.
A concave portion 15 continuous in the length direction is formed on the inner surface of the valley portion 3b.
This makes it possible to carry out evacuation and deaeration easily and reliably as in the past.
（発明の効果）
上述した本発明のOFケーブルによれば、ケー
ブルコア上にリング状波付金属シースが施されて
いるので、金属シースの波の山部で鉛工又は溶接
を行えば、従来のように同一横断面上で金属シー
スとケーブルコアが直接接するケ所がなく、金属
シースとケーブルコア間に空隙を確保出来るの
で、接続部の形成に溶接又は鉛工を採用すること
ができる。その結果、ケーブル絶縁層に低融点
の、例えはポリエチレン、ポリプロピレン、ポリ
ブテン等のポリオレフイン系のプラスチツクフイ
ルムの採用が可能となり、しかもそれらを最も高
性能かつ経済的に統一して使用できるので性能的
及び経済性にすぐれたOFケーブルが実現できる。(Effects of the Invention) According to the above-described OF cable of the present invention, the ring-shaped corrugated metal sheath is provided on the cable core. As there is no place where the metal sheath and cable core directly contact each other on the same cross section, and a gap can be secured between the metal sheath and the cable core, welding or lead work can be used to form the connection part. As a result, it has become possible to use low-melting-point plastic films such as polyolefins such as polyethylene, polypropylene, and polybutene for the cable insulation layer, and it is also possible to use them in a uniform manner with the highest performance and cost. An OF cable with excellent economic efficiency can be realized.
又Ｏリング等を用いた無鉛工接続も可能となる
ので、洞道等において火気を使用しないで接続を
実施できる等の効果を奏する。 Furthermore, lead-free connections using O-rings and the like are also possible, so connections can be made in tunnels and the like without using fire.
第１図は本発明のOFケーブルの実施例の縦断
面図、第２図はその横断面図で、同図イは第１図
のX1−X1断面図、同図ロは第１図X2−X2断面
図、第３図は波付の回転リングの正面図イ及び側
面図ロである。第４図は本発明のOFケーブルの
他の実施例の横断面図である。第５図ないし第８
図はいずれも本発明のOFケーブルの接続部の縦
断面図である。第９図は従来のOFケーブルの縦
断面図イ及び横断面図ロである。
Ｃ……ケーブルコア、１……ケーブル導体、２
……絶縁層、３……リング状波付金属シース、３
ａ……シース山部、３ｂ……シース谷部、３ｃ…
…シース偏平部、５……回転リング、１１……接
続用銅管、１２……溶接又は鉛工部、１３……補
強層、１４……Ｏリング、１５……凹部。
Figure 1 is a longitudinal cross-sectional view of an embodiment of the OF cable of the present invention, and Figure 2 is a cross- sectional view thereof. The X 2 -X 2 sectional view and FIG. 3 are a front view (A) and a side view (B) of the corrugated rotating ring. FIG. 4 is a cross-sectional view of another embodiment of the OF cable of the present invention. Figures 5 to 8
Each figure is a longitudinal cross-sectional view of the connecting portion of the OF cable of the present invention. FIG. 9 is a vertical cross-sectional view (a) and a cross-sectional view (b) of a conventional OF cable. C... Cable core, 1... Cable conductor, 2
...Insulating layer, 3...Ring-shaped corrugated metal sheath, 3
a...Sheath mountain part, 3b...Sheath valley part, 3c...
... Sheath flat part, 5 ... Rotating ring, 11 ... Copper pipe for connection, 12 ... Welding or lead work part, 13 ... Reinforcement layer, 14 ... O-ring, 15 ... Recessed part.
Claims (1)
少くとも一部に有する絶縁層を具えたケーブルコ
アの外側にリング状波付金属シースを設けて成る
ことを特徴とするOFケーブル。 ２ ポリオレフイン系のプラスチツクフイルムが
ポリエチレンフイルム、ポリプロピレンフイル
ム、ポリブテンフイルムの一つ又は複数の組合せ
であることを特徴とする特許請求の範囲第１項記
載のOFケーブル。 ３ 絶縁層がポリオレフイン系のプラスチツクフ
イルムとクラフト紙の組合せより成ることを特徴
とする特許請求の範囲第１項記載のOFケーブル。 ４ リング状波付金属シースの谷部の内面に長さ
方向に連続した凹部を設けたことを特徴とする特
許請求の範囲第１項記載のOFケーブル。[Scope of Claims] 1. An OF cable characterized in that a ring-shaped corrugated metal sheath is provided on the outside of a cable core provided with an insulating layer having at least a portion of a polyolefin plastic film. 2. The OF cable according to claim 1, wherein the polyolefin plastic film is one or a combination of polyethylene film, polypropylene film, and polybutene film. 3. The OF cable according to claim 1, wherein the insulating layer is made of a combination of polyolefin plastic film and kraft paper. 4. The OF cable according to claim 1, characterized in that a concave portion continuous in the length direction is provided on the inner surface of the valley portion of the ring-shaped corrugated metal sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27292485A JPS62131417A (en) | 1985-12-03 | 1985-12-03 | Of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27292485A JPS62131417A (en) | 1985-12-03 | 1985-12-03 | Of cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62131417A JPS62131417A (en) | 1987-06-13 |
| JPH0430690B2 true JPH0430690B2 (en) | 1992-05-22 |
Family
ID=17520650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27292485A Granted JPS62131417A (en) | 1985-12-03 | 1985-12-03 | Of cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62131417A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3420553A (en) * | 1966-02-09 | 1969-01-07 | Calumet & Hecla | Apparatus for absorbing sound and vibration in a piping system |
-
1985
- 1985-12-03 JP JP27292485A patent/JPS62131417A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3420553A (en) * | 1966-02-09 | 1969-01-07 | Calumet & Hecla | Apparatus for absorbing sound and vibration in a piping system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62131417A (en) | 1987-06-13 |
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