JPH0551202B2 - - Google Patents
Info
- Publication number
- JPH0551202B2 JPH0551202B2 JP8715486A JP1548687A JPH0551202B2 JP H0551202 B2 JPH0551202 B2 JP H0551202B2 JP 8715486 A JP8715486 A JP 8715486A JP 1548687 A JP1548687 A JP 1548687A JP H0551202 B2 JPH0551202 B2 JP H0551202B2
- Authority
- JP
- Japan
- Prior art keywords
- resistant
- insulator
- coaxial cable
- fire
- tape
- 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 - Fee Related
Links
- 239000004020 conductor Substances 0.000 claims description 47
- 239000012212 insulator Substances 0.000 claims description 45
- 230000009970 fire resistant effect Effects 0.000 claims description 30
- -1 polytetrafluoroethylene Polymers 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 8
- 239000003063 flame retardant Substances 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 229920006122 polyamide resin Polymers 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 230000001902 propagating effect Effects 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000004962 Polyamide-imide Substances 0.000 claims description 2
- 239000012796 inorganic flame retardant Substances 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920002312 polyamide-imide Polymers 0.000 claims description 2
- 239000009719 polyimide resin Substances 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims 1
- 229920001568 phenolic resin Polymers 0.000 claims 1
- 239000004698 Polyethylene Substances 0.000 description 20
- 229920000573 polyethylene Polymers 0.000 description 20
- 229910052782 aluminium Inorganic materials 0.000 description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 238000002485 combustion reaction Methods 0.000 description 9
- 239000000155 melt Substances 0.000 description 7
- 235000019441 ethanol Nutrition 0.000 description 6
- 229910010272 inorganic material Inorganic materials 0.000 description 5
- 239000011147 inorganic material Substances 0.000 description 5
- 229920006267 polyester film Polymers 0.000 description 5
- 239000010425 asbestos Substances 0.000 description 4
- 238000010292 electrical insulation Methods 0.000 description 4
- 229910052895 riebeckite Inorganic materials 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000005979 thermal decomposition reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は耐火性漏洩同軸ケーブルに関するもの
である。更に詳述すれば本発明は、トンネル、ビ
ル、地下街等のように一般の無線電波が届がな地
域での無線通信に使用される耐火性漏洩同軸ケー
ブルに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fire-resistant leaky coaxial cable. More specifically, the present invention relates to a fire-resistant leaky coaxial cable used for wireless communication in areas where general wireless radio waves cannot reach, such as tunnels, buildings, underground malls, etc.
［従来の技術］
漏洩同軸ケーブルは同軸ケーブルの外部導体に
周期的にスロツトを設けたものである。この漏洩
同軸ケーブルは、内部を伝搬する電磁波の一部を
これらのスロツトから外部空間に輻射させる機能
を有している。[Prior Art] A leaky coaxial cable is a coaxial cable in which slots are periodically provided in the outer conductor. This leaky coaxial cable has the function of radiating a part of the electromagnetic waves propagating inside to the outside space through these slots.
従つて漏洩同軸ケーブルはその末端に固定局を
接続し、ここから信号を送信すると、その信号は
漏洩同軸ケーブルを伝搬しながら外部空間に輻射
され、漏洩同軸ケーブル近傍の移動局で受信する
ことができる。また、これとは逆に移動局から送
信した信号は漏洩同軸ケーブルを介して固定局で
受信することができる。 Therefore, when a fixed station is connected to the end of a leaky coaxial cable and a signal is transmitted from there, the signal is radiated to the outside space while propagating through the leaky coaxial cable, and cannot be received by a mobile station near the leaky coaxial cable. can. Conversely, a signal transmitted from a mobile station can be received by a fixed station via a leaky coaxial cable.
近年、漏洩同軸ケーブルはトンネル、ビル、地
下街等が防災設備用ケーブルとして使用されるよ
うになるのに伴い、耐火性、難燃性が強く要求さ
れるようになつた。 In recent years, as leaky coaxial cables have come to be used as cables for disaster prevention equipment in tunnels, buildings, underground malls, etc., there has been a strong demand for fire resistance and flame retardancy.
さて、従来の漏洩同軸ケーブルは内部導体の外
周に内部絶縁体を介してケーブル内部を伝搬する
電磁波を輻射するためのスロツトを有する外部導
体を設け、最外層に保護シースを設けたものが多
用されている。 Now, conventional leaky coaxial cables often have an outer conductor with a slot on the outer periphery of the inner conductor to radiate electromagnetic waves propagating inside the cable via an inner insulator, and a protective sheath on the outermost layer. ing.
ここにおいて内部絶縁体としては電磁波の伝送
損失をできるだけ小さくする点から誘電体損失が
小さいポリエチレンが多用されている。 Here, polyethylene, which has low dielectric loss, is often used as the internal insulator in order to minimize transmission loss of electromagnetic waves.
また、外部導体としては周期的にスロツトを設
けたアルミニウムテープが使用されており、この
アルミニウムテープはスロツト開口に伴う機械的
強度の低下を補うため、その片面または両面にポ
リエステルフイルムが接着剤を介してラミネート
されているのが通例である。 In addition, an aluminum tape with periodic slots is used as the external conductor, and in order to compensate for the decrease in mechanical strength caused by the opening of the slots, a polyester film is attached to one or both sides of the tape with an adhesive. It is usually laminated.
更に、保護シースとしてはポリエチレン、ポリ
塩化ビニル樹脂等が使用されている。 Furthermore, polyethylene, polyvinyl chloride resin, etc. are used as the protective sheath.
かかる構成の従来の漏洩同軸ケーブルは一度火
災に遭遇すると、まず最外層の保護シースが燃焼
して落下し、そしてその燃焼熱により外部導体の
アルミニウムテープが高温に熱せられ、それに伴
いアルミニウムテープにラミネートされているポ
リエステルフイルムが燃焼する。続いてそのポリ
エステルフイルムの燃焼により加熱された内部絶
縁体のポリエチレンが熱溶融、燃焼しながら落下
する。 When a conventional leaky coaxial cable with this configuration encounters a fire, the outermost protective sheath burns and falls, and the heat of the combustion heats the aluminum tape of the outer conductor to a high temperature, causing the aluminum tape to laminate. The polyester film that is being burned will burn. Subsequently, the polyethylene of the inner insulator heated by the combustion of the polyester film melts and falls while burning.
このように従来の漏洩同軸ケーブルは火災時に
本来の漏洩同軸ケーブルの機能を発揮できないば
かりでなく、延焼や人体への火傷等の二次災害を
誘発する難点があつた。 As described above, conventional leaky coaxial cables not only cannot perform their original function in the event of a fire, but also have the drawback of causing secondary disasters such as the spread of fire and burns to the human body.
そこで耐火性を改善する試みが幾つか提案され
ている。 Therefore, several attempts to improve fire resistance have been proposed.
実公昭52−16682号公報には、ポリエチレン内
部絶縁体と外部導体との間に石綿等の無機材料か
らなる耐熱テープを螺旋状に巻回した漏洩同軸ケ
ーブルが記載されている。この実公昭52−16682
号公報の漏洩同軸ケーブルは、無機材料からなる
耐熱テープの断熱作用によりポリエチレン内部絶
縁体の熱溶融、熱分解、滴下現象までの時間を長
くすることができ且つ内外導体間の電気絶縁を保
持できるので、火災発生後長時間に亘り無線機能
を発揮できるとされている。 Japanese Utility Model Publication No. 52-16682 describes a leaky coaxial cable in which a heat-resistant tape made of an inorganic material such as asbestos is spirally wound between a polyethylene inner insulator and an outer conductor. Kono Jitsuko Showa 52-16682
The leaky coaxial cable of the publication can lengthen the time until thermal melting, thermal decomposition, and dripping phenomena of the polyethylene internal insulator due to the heat insulation effect of the heat-resistant tape made of inorganic material, and can maintain electrical insulation between the inner and outer conductors. Therefore, it is said that the wireless function can be maintained for a long time after a fire breaks out.
しかしながらこの実公昭52−16682号公報の漏
洩同軸ケーブルでは、火災発生時に燃溶融した内
部絶縁体ポリエチレンが石綿等の無機材料からな
る耐熱テープの織目或いはテープの螺旋状巻回の
合わせ目から流出し、そしてその流出した熱溶融
ポリエチレンがアルミニウムテープのスロツト部
より容易に熱溶融落下して高熱危険物となつた
り、燃焼しながら落下して二次火災を発生する危
険がある。 However, in the leaky coaxial cable disclosed in Japanese Utility Model Publication No. 52-16682, when a fire breaks out, the internal insulating polyethylene that burns and melts leaks out from the weave of the heat-resistant tape made of inorganic material such as asbestos or from the seam of the spiral winding of the tape. However, there is a risk that the hot melt polyethylene that has flowed out will easily melt and fall from the slot of the aluminum tape, becoming a highly heat-hazardous substance, or that it will fall while burning, causing a secondary fire.
その上石綿等の無機材料からなる耐熱テープは
本質的に厚さが0.25〜0.5mmと比較的厚く、その
結果ケーブル外径が大きくと共に内外導体間の誘
電損失が大きくなつて伝送損失が大きくなるとい
う難点がある。 Furthermore, heat-resistant tapes made of inorganic materials such as asbestos are inherently relatively thick at 0.25 to 0.5 mm, and as a result, as the outer diameter of the cable increases, the dielectric loss between the inner and outer conductors increases, resulting in greater transmission loss. There is a drawback.
また、実開昭55−3537号公報には、外部導体と
ポリエチレン内部絶縁体との間にポリアミド樹脂
からなる耐熱テープを螺旋状に巻回した漏洩同軸
ケーブルが記載されている。この実開昭55−3537
号公報の漏洩同軸ケーブルは、火災発生時にポリ
エチレン内部絶縁体が溶融しても外部導体とポリ
エチレン内部絶縁体との間にあるポリアミド樹脂
耐熱テープがかなりの時間に亘り電気絶縁機能を
維持し、その結果火災発生後の長時間に亘つて無
線通信機能を確保できるとされている。 Further, Japanese Utility Model Publication No. 55-3537 describes a leaky coaxial cable in which a heat-resistant tape made of polyamide resin is spirally wound between an outer conductor and a polyethylene inner insulator. This fruit was developed in 1977-3537.
In the leaky coaxial cable of the publication, even if the polyethylene inner insulator melts in the event of a fire, the polyamide resin heat-resistant tape between the outer conductor and the polyethylene inner insulator maintains its electrical insulation function for a considerable period of time. As a result, it is said that wireless communication functionality can be maintained for a long time after a fire occurs.
しかしながらこの実開昭55−3537号公報の漏洩
同軸ケーブルでも、実開昭52−16682号公報の漏
洩同軸ケーブルと同様に、火災発生時に熱溶融ポ
リエチレンがアルミニウムテープのスロツト部よ
り熱溶融落下、燃焼する危険が避けられないとい
う難点がある。 However, in the case of the leaky coaxial cable disclosed in Japanese Utility Model Application No. 55-3537, similar to the leaky coaxial cable disclosed in Utility Model Application Publication No. 52-16682, when a fire occurs, heat-molten polyethylene falls from the slot of the aluminum tape and burns. The problem is that the risk of doing so cannot be avoided.
［発明が解決しようとする課題］
本発明はかかる点に立つて為されたものであつ
て、その目的とするところは前記した従来技術の
欠点を解消し、内外導体間の誘電損失が小さく且
つ火災発生時には内部絶縁体が熱溶融落下、燃焼
することがなくしかも長時間に亘り無線通信機能
を完全に確保できる耐火性漏洩同軸ケーブルを提
供することにある。[Problems to be Solved by the Invention] The present invention has been made based on the above points, and its purpose is to eliminate the drawbacks of the prior art described above, to reduce the dielectric loss between the inner and outer conductors, and to reduce the dielectric loss between the inner and outer conductors. To provide a fire-resistant leakage coaxial cable in which the internal insulator does not melt, fall or burn in the event of a fire, and can completely ensure a wireless communication function for a long period of time.
［課題を解決するための手段］
本発明の要旨とするところは、内部導体の外周
に順次絶縁体、外部導体および保護シースを設け
てなる漏洩同軸ケーブルにおいて、絶縁体と外部
導体との間に有機絶縁物系耐熱テープが絶縁体を
包囲するように縦添え成形されており且つその縦
添え成形された有機絶縁物系耐熱テープの両側縁
部側となつた保護シースの外周部にはメツセンジ
ヤーワイヤーが一体的に設けられて成ることを特
徴とする耐火性漏洩同軸ケーブルにある。[Means for Solving the Problems] The gist of the present invention is to provide a leaky coaxial cable in which an insulator, an outer conductor, and a protective sheath are sequentially provided around the outer periphery of an inner conductor. The organic insulating heat-resistant tape is formed vertically so as to surround the insulator, and the protective sheath on both sides of the longitudinally formed organic insulating heat-resistant tape is provided with mesh wires on the outer periphery. A fire-resistant leakage coaxial cable is characterized in that a wire is integrally provided.
ここにおいて有機絶縁物系耐熱テープとは、
500℃において熱分解せずに形状を保持できる薄
肉の有機絶縁物系耐熱テープであつて、例えばポ
リイミド樹脂、ポリアミド樹脂、ポリアミドイミ
ド樹脂、フエノール樹脂、ポリテトラフルオロエ
チレン樹脂等である。 Here, the organic insulating heat-resistant tape is:
It is a thin organic insulating heat-resistant tape that can maintain its shape without thermal decomposition at 500°C, and is made of, for example, polyimide resin, polyamide resin, polyamideimide resin, phenol resin, polytetrafluoroethylene resin, etc.
なお、ここにおいて500℃において熱分解せず
に形状を保持できるポリアミド樹脂とは芳香族ポ
リアミド樹脂のことである。 Note that the polyamide resin that can maintain its shape at 500°C without thermal decomposition is an aromatic polyamide resin.
また、これらの有機絶縁物系耐熱テープの厚さ
は10〜50μｍであり、石綿等の無機材料からなる
耐熱テープの厚さが0.25〜0.5mmに比較して薄肉
である。 Further, the thickness of these organic insulating heat-resistant tapes is 10 to 50 μm, which is thinner than the thickness of heat-resistant tapes made of inorganic materials such as asbestos, which are 0.25 to 0.5 mm.
ここにおいて縦添えされた有機絶縁物系耐熱テ
ープの両側縁があるケーブル外周側にはメツセン
ジヤーワイヤーを一体的に設けられる。 Here, a messenger wire is integrally provided on the outer circumferential side of the cable where both edges of the organic insulating heat-resistant tape attached vertically are located.
本発明においては有機絶縁物系耐熱テープと外
部導体となる金属テープ、例えばアルミニウムテ
ープとを接着剤を介してラミネートして成る耐熱
テープ・アルミニウム複合テープを用いることも
できる。 In the present invention, it is also possible to use a heat-resistant tape/aluminum composite tape obtained by laminating an organic insulating heat-resistant tape and a metal tape serving as an external conductor, such as an aluminum tape, via an adhesive.
この耐熱テープ・アルミニウムテープ複合テー
プは、外部導体を補強する機能をも保持すること
ができ、その結果従来使用していたポリエステル
フイルムのような補強フイルムが不要となる。 This heat-resistant tape/aluminum tape composite tape can also maintain the function of reinforcing the outer conductor, and as a result, a reinforcing film such as the polyester film used conventionally is no longer necessary.
なお、本発明において耐燃テープ・アルミニウ
ムテープ複合テープを用いることは必須要件では
なく、有機絶縁物系耐熱テープとアルミニウムテ
ープをそれぞれ単独で使用することができる。こ
の場合外部導体には従来使用していたポリエステ
ルフイルムのような補強フイルムをラミネートす
る必要がある。 Note that in the present invention, it is not essential to use a composite tape of flame-resistant tape and aluminum tape, and organic insulating heat-resistant tape and aluminum tape can be used individually. In this case, it is necessary to laminate the outer conductor with a reinforcing film such as the conventionally used polyester film.
本発明において保護シースは炎に当たつて直ち
に熱溶融、燃焼滴下してしまう材料ではなく、炎
に当たつても一旦は炭化或いは灰化してから脱落
する難燃材料を用いるのが適切である。ここにお
いて難燃材料は一般に誘電損失が大きいことか
ら、難燃材料を外部導体外周に直接設けた場合、
得られる耐火性漏洩同軸ケーブルの伝送損失が大
きくなる。そこで外部導体外周にポリエチレンの
ような低損失材料からなる内部シースを設け、こ
の外周に難燃材料からなる外部シースを設けるこ
とが好ましい。 In the present invention, it is appropriate for the protective sheath to be made of a flame-retardant material that is carbonized or ashed and then falls off when exposed to flame, rather than a material that immediately melts and burns when exposed to flame. . Here, flame-retardant materials generally have large dielectric loss, so if flame-retardant materials are provided directly on the outer periphery of the outer conductor,
The transmission loss of the resulting fire-resistant leaky coaxial cable increases. Therefore, it is preferable to provide an inner sheath made of a low-loss material such as polyethylene around the outer periphery of the outer conductor, and an outer sheath made of a flame-retardant material around this outer periphery.
難燃材料としてはポリ塩化ビニル樹脂を主体と
した材料、水酸化マグネシウムや水和アルミナ等
の無機系難燃剤を加えたポリエチレン等のポリオ
レフイン等があげられる。 Examples of flame-retardant materials include materials based on polyvinyl chloride resin, and polyolefins such as polyethylene to which inorganic flame retardants such as magnesium hydroxide and hydrated alumina are added.
［作用］
本発明の耐火性漏洩同軸ケーブルは、絶縁体と
外部導体との間に有機絶縁物系耐熱テープが絶縁
体を包囲すように縦添え成形されており、しかも
その縦添え成形された有機絶縁物系耐熱テープの
両側縁部側となつた保護シースの外周部にはメツ
センジヤーヤイヤーが一体的に設けてあるので、
本発明の耐火性漏洩同軸ケーブルをメツセンジヤ
ーワイヤを介して吊り下げ布設されたときには、
その縦添え成形された有機絶縁物系耐熱テープの
両側縁部がケーブルの上部側に位置することにな
る。[Function] The fire-resistant leaky coaxial cable of the present invention has an organic insulating heat-resistant tape formed vertically between an insulator and an external conductor so as to surround the insulator. Messenger wires are integrally installed on the outer periphery of the protective sheath on both side edges of the organic insulating heat-resistant tape.
When the fire-resistant leaky coaxial cable of the present invention is suspended and installed via messenger wire,
Both side edges of the vertically spliced organic insulating heat-resistant tape are located on the upper side of the cable.
従つて本発明の耐火性漏洩同軸ケーブルの布設
周辺に火災が発生し、絶縁体等が熱溶融してもそ
の熱溶融物がケーブル外へ高温のまま落下した
り、燃焼しながら落下したりする危険が全くな
い。 Therefore, even if a fire occurs around the installation of the fire-resistant leaky coaxial cable of the present invention and the insulator etc. melts, the melted material may fall outside the cable while remaining at a high temperature, or may fall while burning. There is no danger at all.
しかも本発明の耐火性漏洩同軸ケーブルは、そ
の内部絶縁体と外部導体との間に有機絶縁物系耐
熱テープが介在されているので、火災発生時のよ
うな高温下でも優れた電気絶縁特性を発揮し、そ
の結果火災発生時においても高信頼性の無線通信
機能を発揮することができる。 Furthermore, the fire-resistant leaky coaxial cable of the present invention has an organic insulating heat-resistant tape interposed between its internal insulator and external conductor, so it has excellent electrical insulation properties even under high temperatures such as when a fire occurs. As a result, highly reliable wireless communication functions can be provided even in the event of a fire.
［実施例］
次に、本発明の耐火性漏洩同軸ケーブルの実施
例を図面により説明する。[Example] Next, an example of the fire-resistant leaky coaxial cable of the present invention will be described with reference to the drawings.
図面は本発明の耐火性漏洩同軸ケーブルの一実
施例を示した斜視説明図である。 The drawing is a perspective explanatory view showing one embodiment of the fire-resistant leaky coaxial cable of the present invention.
図面において１はアルミニウムパイプから成る
内部導体、２は内部導体１の外周に設けられた絶
縁体、５は有機絶縁物系耐熱テープ、６はアルミ
ニウムテープから成る外部導体、７は外部導体６
に開口されているスロツト、８は保護シース、１
１はメツセンジヤーワイヤである。 In the drawing, 1 is an internal conductor made of an aluminum pipe, 2 is an insulator provided on the outer periphery of the internal conductor 1, 5 is an organic insulating heat-resistant tape, 6 is an external conductor made of an aluminum tape, and 7 is an external conductor 6
8 is a protective sheath; 1 is a slot opened in
1 is a messenger wire.
ここにおいて絶縁体２は、内部導体１の外周に
螺旋状に巻回された紐状絶縁体３と、その紐状絶
縁体３の外周に押出し被覆されたチユーブ状絶縁
体４とから成つている。この紐状絶縁体３及びチ
ユーブ状絶縁体４の材料は低誘電損失のポリエチ
レンが用いられている。 Here, the insulator 2 consists of a string-like insulator 3 spirally wound around the outer periphery of the inner conductor 1, and a tube-like insulator 4 extruded and coated on the outer periphery of the string-like insulator 3. . The string-like insulator 3 and the tube-like insulator 4 are made of polyethylene with low dielectric loss.
また、アルミニウムテープから成る外部導体６
の片面側には有機絶縁物系耐熱テープ５として厚
さ25μｍのポリイミドテープが図示しない接着剤
を介してラミネートされて「耐熱テープ５・外部
導体６複合テープ」と成つている。この「耐熱テ
ープ５・外部導体６複合テープ」はその長手方向
に所定間隔をおいて周期的にスロツト７が打ち抜
かれている。そしてこの「耐熱テープ５・外部導
体６複合テープ」は外部導体６が外側となるよう
にチユーブ状絶縁体４の外周を包囲するように縦
添え成形され且つその縦添え成形された耐熱テー
プ５の両側縁１２，１３と外部導体６の重ね合せ
部１４があるケーブル外周部にはメツセンジヤー
ワイヤ１１が一体的に設けられている。 In addition, an outer conductor 6 made of aluminum tape
A polyimide tape with a thickness of 25 μm is laminated on one side of the tape as an organic insulating heat-resistant tape 5 via an adhesive (not shown) to form a "heat-resistant tape 5/outer conductor 6 composite tape". This "heat-resistant tape 5/outer conductor 6 composite tape" has slots 7 periodically punched out at predetermined intervals in its longitudinal direction. This "heat-resistant tape 5/external conductor 6 composite tape" is vertically spliced so as to surround the outer periphery of the tubular insulator 4 so that the external conductor 6 is on the outside, and the heat-resistant tape 5 that has been vertically spliced is A messenger wire 11 is integrally provided on the outer periphery of the cable where the overlapping portion 14 of the outer conductor 6 and the side edges 12, 13 are located.
従つて得られた本発明の一実施例の耐火性漏洩
同軸ケーブルをメツセンジヤーワイヤ１１を介し
て吊り下げ布設すると、縦添え成形された耐熱テ
ープ５の両側縁１２，１３と外部導体６の重ね合
せ部１４とはメツセンジヤーワイヤ１１側、即ち
常に耐火性漏洩同軸ケーブルの上側に位置するこ
とになり、その結果火災発生時には紐状絶縁体３
とチユーブ状絶縁体４とから成る絶縁体２の熱溶
融物が溶融落下したり、落下しながら燃焼するこ
とが全くない。 Therefore, when the obtained fire-resistant leaky coaxial cable according to an embodiment of the present invention is suspended and laid through the messenger wire 11, the edges 12 and 13 of the longitudinally spliced heat-resistant tape 5 and the outer conductor 6 are connected to each other. The overlapping portion 14 is always located on the messenger wire 11 side, that is, on the upper side of the fire-resistant leakage coaxial cable, and as a result, in the event of a fire, the string-like insulator 3
The hot melt of the insulator 2 consisting of the insulator 2 and the tube-shaped insulator 4 never melts and falls, or burns while falling.
更に、本発明の一実施例の耐火性漏洩同軸ケー
ブルでは、保護シース８は内部シース９と外部シ
ース１０とから成つている。この場合、内部シー
ス９は厚さ１mmとなるようにポリエチレンを押出
し被覆したものであり、また外部シース１０は厚
さ２mmとなるようにポリ塩化ビニル樹脂を主体と
した難燃材料を押出し被覆したものである。 Furthermore, in the fire-resistant leaky coaxial cable according to one embodiment of the present invention, the protective sheath 8 consists of an inner sheath 9 and an outer sheath 10. In this case, the inner sheath 9 is extruded and coated with polyethylene to a thickness of 1 mm, and the outer sheath 10 is extruded and coated with a flame retardant material mainly made of polyvinyl chloride resin to a thickness of 2 mm. It is something.
次に、かくして得られた本発明の一実施例の耐
火性漏洩同軸ケーブルの耐火性試験を行つた。 Next, a fire resistance test was conducted on the thus obtained fire resistant leaky coaxial cable according to one embodiment of the present invention.
耐火性試験はメツセンジヤーワイヤ１１を介し
て吊り下げ布設した耐火性漏洩同軸ケーブル（外
径50mm）の下方200mmのところにエチルアルコー
ル1000c.c.が入つた容器を置き、そのエチルアルコ
ールを着火、燃焼させた。燃焼開始後約10分で炎
の当たつた保護シース８部分は炭化或いは灰化し
て落下したが、エチルアルコール燃焼開始後25分
経過してもポリエチレンから成る紐状絶縁体３及
びチユーブ状絶縁体４は熱溶融しても高温のまま
落下することもら落下することも全くなかつた。
そしてエチルアルコール1000c.c.が全量燃焼した
後、耐火性漏洩同軸ケーブルの炎は完全に消失し
た。 In the fire resistance test, a container containing 1000 c.c. of ethyl alcohol was placed 200 mm below the fire-resistant leaky coaxial cable (outer diameter 50 mm) suspended via the messenger wire 11, and the ethyl alcohol was ignited. , burned. Approximately 10 minutes after the start of combustion, the 8 parts of the protective sheath that were exposed to the flames were carbonized or ashed and fell, but even after 25 minutes had passed after the start of combustion of ethyl alcohol, the string-like insulator 3 made of polyethylene and the tube-like insulator were still intact. Even when No. 4 was melted, it did not fall while remaining at a high temperature, nor did it fall at all.
After all 1000 c.c. of ethyl alcohol was burned, the flame in the fire-resistant leaky coaxial cable was completely extinguished.
一方、内部導体１の外周に絶縁体２を設け、こ
の絶縁体２の外周にポリエステルテープラミネー
トアルミニウムテープをポリエシテルテープ側が
外側となるように単に縦添えし、更にその他は本
発明の一実施例の耐火性漏洩同軸ケーブルと同様
にして得た比較例の耐火性漏洩同軸ケーブルを得
た。 On the other hand, an insulator 2 is provided on the outer periphery of the internal conductor 1, and a polyester tape laminated aluminum tape is simply attached vertically to the outer periphery of the insulator 2 with the polyester tape side facing outward. A comparative fire-resistant leaky coaxial cable was obtained in the same manner as the fire-resistant leaky coaxial cable.
この比較例の耐火性漏洩同軸ケーブルについて
上記の耐火性試験を行つたところ、保護シース８
がまず落下し、それからポリエチレンから成る絶
縁体２が熱溶融落下し、更に一部は燃焼しながら
落下したりした。そしてエチルアルコール燃焼開
始後25分経過してもこのような現象が続き、完全
に消失したのはエチルアルコール燃焼開始後35分
経過であつた。 When the above fire resistance test was conducted on the fire resistant leaky coaxial cable of this comparative example, the protective sheath 8
first fell, then the insulator 2 made of polyethylene melted and fell, and some of it also fell while burning. This phenomenon continued even 25 minutes after the start of ethyl alcohol combustion, and completely disappeared 35 minutes after the start of ethyl alcohol combustion.
［発明の効果］
本発明の耐火性漏洩同軸ケーブルは次のような
顕著なる効果を奏する。[Effects of the Invention] The fire-resistant leaky coaxial cable of the present invention has the following remarkable effects.
(1) 本発明の耐火性漏洩同軸ケーブルは、火災発
生時の燃焼熱にポリエチレン絶縁体が熱溶融し
ても、その熱溶融ポリエチレンの落下を完全に
抑止でき、その結果熱溶融ポリエチレン絶縁体
の落下による燃焼、火傷等の二次災害を完全に
抑止することができる。(1) The fire-resistant leakage coaxial cable of the present invention can completely prevent the hot-melted polyethylene from falling even if the polyethylene insulator is melted by the combustion heat in the event of a fire. Secondary disasters such as combustion and burns caused by falling can be completely prevented.
(2) 本発明の耐火性漏洩同軸ケーブルは、火災発
生時の燃焼熱によりポリエチレン絶縁体が熱溶
融しても、内部導体と外部導体との間に有機絶
縁物系耐熱テープか存在するので、優れた高温
下での電気絶縁性を発揮し、それにより火災発
生後長時間に亘り優れた通信機能を完全に発揮
できる。(2) In the fire-resistant leaky coaxial cable of the present invention, even if the polyethylene insulator melts due to combustion heat in the event of a fire, the organic insulating heat-resistant tape is present between the inner conductor and the outer conductor. It exhibits excellent electrical insulation properties at high temperatures, allowing it to fully demonstrate its excellent communication function for a long time after a fire occurs.
(3) 本発明の耐火性漏洩同軸ケーブルは、用いた
有機絶縁物系耐熱テープの厚さが10〜50μｍと
薄いことから内部導体と外部導体間の誘電損失
を効果的に小さくでき、その結果優れた通信機
能を発揮できる。(3) In the fire-resistant leaky coaxial cable of the present invention, since the thickness of the organic insulating heat-resistant tape used is as thin as 10 to 50 μm, the dielectric loss between the inner conductor and the outer conductor can be effectively reduced. Demonstrates excellent communication capabilities.
図面は本発明の耐火性漏洩同軸ケーブルの一実
施例を示した斜視説明図である。
１：内部導体、２：絶縁体、３：紐状絶縁体、
４：チユーブ状絶縁体、５：有機絶縁物系耐熱テ
ープ、６：外部導体、７：スロツト、８：保護シ
ース、９：内部シース、１０：外部シース、１
１：メツセンジヤーワイヤ、１２，１３：縦添え
した有機絶縁物系耐熱テープの側縁部、１４：外
部導体の重ね合せ部。
The drawing is a perspective explanatory view showing one embodiment of the fire-resistant leaky coaxial cable of the present invention. 1: internal conductor, 2: insulator, 3: string-like insulator,
4: Tubular insulator, 5: Organic insulating heat-resistant tape, 6: Outer conductor, 7: Slot, 8: Protective sheath, 9: Inner sheath, 10: Outer sheath, 1
1: Messenger wire, 12, 13: Side edge portion of organic insulating heat-resistant tape attached vertically, 14: Overlapping portion of external conductor.
Claims (1)
内部を伝搬する電磁波を輻射するためのスロツト
を有する外部導体および保護シースを設けてなる
漏洩同軸ケーブルにおいて、前記絶縁体と前記外
部導体との間には有機絶縁物系耐熱テープが前記
絶縁体を包囲するように縦添え成形されており且
つ該縦添え成形された有機絶縁物系耐熱テープの
両側縁部側となつた前記保護シースの外周部には
メツセンジヤーワイヤが一体的に設けられて成る
ことを特徴とする耐火性漏洩同軸ケーブル。 ２ 前記有機絶縁物系耐熱テープはその片面に前
記外部導体が接着剤を介してラミネートされて成
る耐熱テープ・外部導体複合テープであることを
特徴とする特許請求の範囲第１項記載の耐火性漏
洩同軸ケーブル。 ３ 前記絶縁体は前記内部導体上に巻回された紐
状絶縁体と該紐状絶縁体の外周にチユーブ状に被
覆されたチユーブ状絶縁体とから成ることを特徴
とする特許請求の範囲第１項記載の耐火性漏洩同
軸ケーブル。 ４ 有機絶縁物系耐熱テープが500℃において熱
分解せず且つ形状を保持できる薄肉のポリイミド
樹脂、ポリアミド樹脂、ポリアミドイミド樹脂、
フエノール樹脂、ポリテトラフルオロエチレン樹
脂の中から選ばれた一種の耐熱テープであること
を特徴とする特許請求の範囲第１項記載の耐火性
漏洩同軸ケーブル。 ５ 前記保護シースが電気的低損失材料から成る
内部シースと該内部シース上に設けられた難燃性
材料とから成ることを特徴とする特許請求の範囲
第１項記載の耐火性漏洩同軸ケーブル。 ６ 難燃性材料がポリオレフインに無機系難燃剤
を含有したものであることを特徴とする特許請求
の範囲第５項記載の耐火性漏洩同軸ケーブル。[Scope of Claims] 1. A leaky coaxial cable in which an insulator, an outer conductor having a slot for radiating electromagnetic waves propagating inside the coaxial cable, and a protective sheath are sequentially provided on the outer periphery of an inner conductor, wherein the insulator and the Between the outer conductor and the organic insulating heat-resistant tape, an organic insulating heat-resistant tape is formed vertically so as to surround the insulator, and the organic insulating heat-resistant tape is formed on both sides of the longitudinally formed organic insulating heat-resistant tape. A fire-resistant leakage coaxial cable characterized in that a messenger wire is integrally provided on the outer periphery of a protective sheath. 2. The fire resistance according to claim 1, wherein the organic insulator-based heat-resistant tape is a heat-resistant tape/external conductor composite tape in which the external conductor is laminated on one side of the tape via an adhesive. Leaky coaxial cable. 3. The insulator is comprised of a string-like insulator wound on the inner conductor and a tube-like insulator coated on the outer periphery of the string-like insulator. The fire-resistant leaky coaxial cable described in item 1. 4 Thin polyimide resin, polyamide resin, polyamide-imide resin, which allows the organic insulating heat-resistant tape to not thermally decompose at 500°C and retain its shape.
The fire-resistant leaky coaxial cable according to claim 1, characterized in that it is a type of heat-resistant tape selected from phenolic resin and polytetrafluoroethylene resin. 5. The fire-resistant leaky coaxial cable of claim 1, wherein the protective sheath comprises an inner sheath made of a low electrical loss material and a flame retardant material disposed on the inner sheath. 6. The fire-resistant leaky coaxial cable according to claim 5, wherein the flame-retardant material is polyolefin containing an inorganic flame retardant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62015486A JPS62276904A (en) | 1986-02-12 | 1987-01-26 | Fire resistant leakage coaxial cable |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61-18625 | 1986-02-12 | ||
| JP62015486A JPS62276904A (en) | 1986-02-12 | 1987-01-26 | Fire resistant leakage coaxial cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62276904A JPS62276904A (en) | 1987-12-01 |
| JPH0551202B2 true JPH0551202B2 (en) | 1993-08-02 |
Family
ID=11890123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62015486A Granted JPS62276904A (en) | 1986-02-12 | 1987-01-26 | Fire resistant leakage coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62276904A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE523920T1 (en) * | 2006-01-20 | 2011-09-15 | Alcatel Lucent | HIGH FREQUENCY WAVEGUIDE WITH ELECTRICAL CONDUCTOR MADE OF A PLASTIC FILM COATED WITH A CONDUCTIVE LAYER |
| CN110148492B (en) * | 2019-06-25 | 2020-06-30 | 晋源电气集团股份有限公司 | Cross-linked polyethylene insulated fire-resistant flame-retardant power cable |
| JP6842647B2 (en) * | 2019-12-20 | 2021-03-17 | 日立金属株式会社 | Coaxial cable and its manufacturing method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140459A (en) * | 1975-12-19 | 1976-12-03 | Furukawa Electric Co Ltd:The | Uhf leakage coaxial cable |
| JPS5237431B2 (en) * | 1975-09-02 | 1977-09-22 | ||
| JPS5431446B2 (en) * | 1972-10-25 | 1979-10-06 | ||
| JPS5431445B2 (en) * | 1974-02-04 | 1979-10-06 | ||
| JPS553537B2 (en) * | 1974-12-11 | 1980-01-25 | ||
| JPS5530008U (en) * | 1978-08-16 | 1980-02-27 | ||
| JPS6086901A (en) * | 1983-09-15 | 1985-05-16 | レ・カーブル・ドウ・リヨン | Radiation type coaxial electric cable |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5237431U (en) * | 1975-09-10 | 1977-03-16 | ||
| JPS5292636U (en) * | 1976-01-06 | 1977-07-11 | ||
| JPS5431446U (en) * | 1977-08-03 | 1979-03-01 | ||
| JPS5431445U (en) * | 1977-08-03 | 1979-03-01 | ||
| JPS553537U (en) * | 1978-06-20 | 1980-01-10 |
-
1987
- 1987-01-26 JP JP62015486A patent/JPS62276904A/en active Granted
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431446B2 (en) * | 1972-10-25 | 1979-10-06 | ||
| JPS5431445B2 (en) * | 1974-02-04 | 1979-10-06 | ||
| JPS553537B2 (en) * | 1974-12-11 | 1980-01-25 | ||
| JPS5237431B2 (en) * | 1975-09-02 | 1977-09-22 | ||
| JPS51140459A (en) * | 1975-12-19 | 1976-12-03 | Furukawa Electric Co Ltd:The | Uhf leakage coaxial cable |
| JPS5530008U (en) * | 1978-08-16 | 1980-02-27 | ||
| JPS6086901A (en) * | 1983-09-15 | 1985-05-16 | レ・カーブル・ドウ・リヨン | Radiation type coaxial electric cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62276904A (en) | 1987-12-01 |
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