JP4333993B2 - coaxial cable - Google Patents
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- JP4333993B2 JP4333993B2 JP2004145755A JP2004145755A JP4333993B2 JP 4333993 B2 JP4333993 B2 JP 4333993B2 JP 2004145755 A JP2004145755 A JP 2004145755A JP 2004145755 A JP2004145755 A JP 2004145755A JP 4333993 B2 JP4333993 B2 JP 4333993B2
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- coaxial cable
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- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 69
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 69
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- 239000011888 foil Substances 0.000 claims description 32
- 239000004020 conductor Substances 0.000 claims description 24
- 239000012212 insulator Substances 0.000 claims description 8
- -1 polyethylene terephthalate Polymers 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 38
- 229910052802 copper Inorganic materials 0.000 description 18
- 239000010949 copper Substances 0.000 description 18
- 239000011889 copper foil Substances 0.000 description 15
- 230000002411 adverse Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009954 braiding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Description
本発明は同軸ケーブルに関するものである。更に詳しくは、中心導体の外周に絶縁体を設けてなる同軸芯の外周に、外部導体として、金属箔とＰＥＴテープを張り合わせた金属箔ＰＥＴラミネートテープを縦添えし、その上に編組を設け、更にこの外周に外被を設けてなる同軸ケーブルに関する。 The present invention relates to a coaxial cable. More specifically, a metal foil PET laminate tape obtained by laminating a metal foil and a PET tape is vertically attached as an outer conductor to the outer periphery of the coaxial core formed by providing an insulator on the outer periphery of the center conductor, and a braid is provided thereon. Further, the present invention relates to a coaxial cable having a jacket on the outer periphery.
同軸ケーブルは各種電子機器の配線材として使用されており、特に高周波用途として多用されている。同軸ケーブルの外部導体として、金属箔、例えば銅箔或はアルミ箔とＰＥＴテープを張り合わせた金属箔ＰＥＴラミネートテープ（以下、金属ＰＥＴテープと略記する）を同軸芯の外周に縦添えし、その上に編組を設ける構造は従来から使用されていた。例えば前記構造の同軸ケーブルは下記特許文献１に記載されている。なお、従来ここに使用されているＰＥＴテープは主にＪＩＳ Ｃ ２３１８に規定されているテープで、引っ張り強さの実力は３００MPa未満(通常２００MPa近辺)、伸びは１００％以上(通常２００〜４００％)であった。
同軸ケーブルを各種電子機器の配線材、例えば自動車のＥＴＣ（自動料金収受システム）用として使用し、この同軸ケーブルに張力、振動などの外力が加わった場合、従来の金属ＰＥＴテープに使用されるＰＥＴテープは伸び易い為、銅、アルミなどの金属箔の伸びが追従できず、金属箔に亀裂が入り易い欠点があった。また金属箔に亀裂が入った後もＰＥＴテープは切断しない為、テープ全体には引き続き張力が加わり金属箔に複数箇所の亀裂が多数発生する場合があった。例えば銅箔とＰＥＴテープを張り合わせた銅箔ＰＥＴラミネートテープ（以下、銅ＰＥＴテープと略記する）の銅箔に複数箇所の亀裂が多数発生した状態（ケーブルを分解して編組および外被を除去）を図２の写真に示す。そして金属箔に発生した複数箇所の亀裂は同軸ケーブルの減衰特性に悪影響を及ぼし減衰量が過大になる恐れがあり、各種電子機器の性能を低下させる危険性があるという問題点があった。前記銅ＰＥＴテープの銅箔に複数箇所の亀裂が多数発生した同軸ケーブルの減衰特性を試験した結果を図３の減衰特性試験チャートに示す。なお同図(a)は銅ＰＥＴテープ除去前、また同図(b)は銅ＰＥＴテープ除去後（ケーブルを分解して銅ＰＥＴテープを取り出し、再度編組を被せた）であり、横軸が周波数（GHz）、縦軸が減衰量（dB）である。この図３の試験チャートから明らかなように、銅ＰＥＴテープの銅箔に複数箇所の亀裂が多数発生したケーブルを測定した同図(a)では周波数が高くなると減衰量が急激に大きくなっていることが分かる。また複数箇所の亀裂が多数発生した銅ＰＥＴテープを除去した後の測定の同図(b)では減衰量が大幅に改善されていることが分かる。 When coaxial cables are used as wiring materials for various electronic devices, for example, ETC (automatic toll collection system) for automobiles, and external forces such as tension and vibration are applied to these coaxial cables, PET used for conventional metal PET tape Since the tape is easy to stretch, the elongation of the metal foil such as copper and aluminum cannot follow and there is a defect that the metal foil is easily cracked. Further, since the PET tape is not cut even after the metal foil is cracked, tension was continuously applied to the entire tape, and many cracks at a plurality of locations sometimes occurred in the metal foil. For example, a state in which many cracks are generated in a copper foil of a copper foil PET laminate tape (hereinafter abbreviated as copper PET tape) in which copper foil and PET tape are bonded together (disassembling the cable and removing the braid and jacket) Is shown in the photograph of FIG. And the crack of several places which generate | occur | produced in metal foil has a bad influence on the attenuation | damping characteristic of a coaxial cable, there exists a possibility that attenuation amount may become excessive, and there existed a problem that there existed a danger of reducing the performance of various electronic devices. The attenuation characteristic test chart of FIG. 3 shows the results of testing the attenuation characteristics of the coaxial cable in which a large number of cracks were generated in the copper foil of the copper PET tape. The figure (a) is before removing the copper PET tape, and the figure (b) is after removing the copper PET tape (disassembling the cable, taking out the copper PET tape, and covering it again), and the horizontal axis is the frequency. (GHz), the vertical axis is the attenuation (dB). As is apparent from the test chart of FIG. 3, in FIG. 3 (a), when a cable in which a plurality of cracks occurred in a copper foil of a copper PET tape was measured, the amount of attenuation increased rapidly as the frequency increased. I understand that. In addition, the attenuation after the removal of the copper PET tape having a large number of cracks at a plurality of locations is significantly improved in FIG.
本発明は、上記従来技術が有する各種問題点を解決するためになされたものであり、各種電子機器の配線材に使用される同軸ケーブルに張力、振動などの外力が加わった場合、金属箔の亀裂発生を無くす、または低減させることができ、同軸ケーブルの減衰特性に悪影響を及ぼさない同軸ケーブルを提供することを目的とする。 The present invention has been made to solve the various problems of the prior art, and when an external force such as tension or vibration is applied to the coaxial cable used for the wiring material of various electronic devices, An object of the present invention is to provide a coaxial cable that can eliminate or reduce the occurrence of cracks and does not adversely affect the attenuation characteristics of the coaxial cable.
第１の観点として本発明は、中心導体１の外周に絶縁体２を設けてなる同軸芯３の外周に、内側の外部導体４として金属箔４ａとＰＥＴ（ポリエチレンテレフタレート）テープ４ｂを張り合わせた金属箔ＰＥＴラミネートテープ４を縦添えし、その上に外側の外部導体５として編組５を設け、更にこの外周に外被６を設けてなる同軸ケーブルであって、
前記金属箔ＰＥＴラミネートテープ４のＰＥＴテープ４ｂとして、引っ張り強さが３００〜４００MPaで、伸びが５０〜１１０％の高強度ＰＥＴテープを用いたことを特徴とする同軸ケーブル１０にある。
前記中心導体１としては、例えば銅線、アルミ線の単線または撚り線が用いられる。前記絶縁体２としては、例えばＰＥ（ポリエチレン）樹脂、フッ素系樹脂の充実体または発泡体が用いられる。前記金属ＰＥＴテープ４の金属箔４ａとしては、例えば銅箔またはアルミ箔が用いられる。前記編組５としては、例えば軟銅線編組、めっき軟銅線編組が用いられる。前記外被６としては、例えばＰＶＣ（ポリ塩化ビニル）樹脂が用いられる。
上記第１観点の同軸ケーブルでは、金属ＰＥＴテープ４のＰＥＴテープ４ｂとして、引っ張り強さが３００〜４００Mpaで、伸びが５０〜１１０％の高強度ＰＥＴテープを用いているので、ＰＥＴテープが伸びにくくなり、同軸ケーブルに張力、振動などの外力が加わった場合、金属箔の亀裂発生を低減させることができ、同軸ケーブルの減衰特性に悪影響を及ぼさないようになり、各種電子機器の性能の低下が無くなる。また高強度ＰＥＴテープは従来のＰＥＴテープと比べて伸びの少ない特徴も有るため、金属箔に亀裂が入った場合、同時に切断する可能性が高く、連続して金属箔に亀裂が多発することを防止できるようになり、同軸ケーブルの減衰特性に殆んど悪影響を及ぼさないようになる。
なお高強度ＰＥＴテープ４ｂの引っ張り強さを３００〜４００Mpaと限定したのは、３００Mpa未満では、金属箔の亀裂発生を低減させる効果がなく、また４００Mpaを超えても、更なる亀裂発生の低減効果が無いためである。また高強度ＰＥＴテープ４ｂの伸びを５０〜１１０％に限定したのは、５０％未満では金属ＰＥＴテープに使用するテープとして好ましくなく、また１１０％を超えると銅・アルミなどの金属箔の伸びが追従できず、金属箔に亀裂が入り易く、また多数発生する危険性があるためである。なお、一般に用いられる銅箔単体の伸びは2.5〜3.5％位であるがＰＥＴテープに追従してそれ以上伸びるものである。
As a first aspect, the present invention is a metal in which a metal foil 4a and a PET (polyethylene terephthalate) tape 4b are bonded to an outer periphery of a coaxial core 3 provided with an insulator 2 on the outer periphery of a central conductor 1 as an inner outer conductor 4. A coaxial cable in which a foil PET laminate tape 4 is vertically attached, a braid 5 is provided as an outer outer conductor 5 thereon, and a jacket 6 is further provided on the outer periphery thereof,
As the PET tape 4b of the metal foil PET laminated tape 4, a high strength PET tape having a tensile strength of 300 to 400 MPa and an elongation of 50 to 110% is used.
As the central conductor 1, for example, a copper wire, a single wire of aluminum wire or a stranded wire is used. As the insulator 2, for example, a solid or foamed body of PE (polyethylene) resin or fluororesin is used. As the metal foil 4a of the metal PET tape 4, for example, copper foil or aluminum foil is used. As the braid 5, for example, an annealed copper wire braid or a plated annealed copper wire braid is used. As the jacket 6, for example, a PVC (polyvinyl chloride) resin is used.
In the coaxial cable of the first aspect, since the PET tape 4b of the metal PET tape 4 is a high-strength PET tape having a tensile strength of 300 to 400 MPa and an elongation of 50 to 110%, the PET tape is difficult to stretch. Therefore, when an external force such as tension or vibration is applied to the coaxial cable, the occurrence of cracks in the metal foil can be reduced, the attenuation characteristics of the coaxial cable are not adversely affected, and the performance of various electronic devices is reduced. Disappear. In addition, since high-strength PET tape also has a feature that is less stretched than conventional PET tape, if the metal foil is cracked, there is a high possibility that it will be cut at the same time, and the metal foil will continue to crack frequently. It becomes possible to prevent it, and it hardly becomes a bad influence on the attenuation characteristic of a coaxial cable.
Note that the tensile strength of the high-strength PET tape 4b is limited to 300 to 400 Mpa because if it is less than 300 Mpa, there is no effect of reducing the occurrence of cracks in the metal foil. Because there is no. The elongation of the high-strength PET tape 4b is limited to 50 to 110%. If it is less than 50%, it is not preferable as a tape used for a metal PET tape. This is because it cannot follow, the metal foil is easily cracked, and there is a risk of many occurrences. In addition, although the elongation of the copper foil used generally is about 2.5 to 3.5%, it follows the PET tape and extends further.
本発明の同軸ケーブルでは、各種電子機器の配線材に使用される同軸ケーブルに張力、振動などの外力が加わった場合、金属ＰＥＴテープの金属箔の亀裂発生を無くす、または低減させることができ、同軸ケーブルの減衰特性に悪影響を及ぼさない同軸ケーブルとすることができる。従って、本発明は産業上に寄与する効果が極めて大である。 In the coaxial cable of the present invention, when an external force such as tension and vibration is applied to the coaxial cable used for the wiring material of various electronic devices, the occurrence of cracks in the metal foil of the metal PET tape can be eliminated or reduced, A coaxial cable that does not adversely affect the attenuation characteristics of the coaxial cable can be obtained. Therefore, the present invention has an extremely large effect contributing to the industry.
以下、本発明の内容を、図に示す実施の形態により更に詳細に説明する。なお、これにより本発明が限定されるものではない。
図１は、本発明の同軸ケーブルを説明するための略図である。同図(a)は本発明の同軸ケーブルの構造を説明するための一部切欠側面図である。同図(b)は、本発明の同軸ケーブルに用いる金属ＰＥＴテープの構造を示す略図である。
これらの図において、１は中心導体、２は絶縁体、３は同軸芯、４は内側の外部導体（金属箔ＰＥＴラミネートテープ縦添え）、４ａは金属箔、４ｂは高強度ＰＥＴテープ（ＰＥＴテープ）、５は外側の外部導体（編組）、６は外被、また１０は同軸ケーブルである。
Hereinafter, the contents of the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.
FIG. 1 is a schematic diagram for explaining a coaxial cable of the present invention. FIG. 4A is a partially cutaway side view for explaining the structure of the coaxial cable of the present invention. FIG. 2B is a schematic diagram showing the structure of a metal PET tape used for the coaxial cable of the present invention.
In these figures, 1 is a central conductor, 2 is an insulator, 3 is a coaxial core, 4 is an inner outer conductor (with metal foil PET laminate tape vertically), 4a is a metal foil, 4b is a high-strength PET tape (PET tape) ) 5 is an outer outer conductor (braid), 6 is a jacket, and 10 is a coaxial cable.
本発明の同軸ケーブルの第１実施例について図１を用いて説明する。
本発明の同軸ケーブル１０は、中心導体１の外周に絶縁体２を設けてなる同軸芯３の外周に、内側の外部導体４として金属箔４ａとＰＥＴテープ４ｂを張り合わせた金属ＰＥＴテープ４を縦添えし、その上に外側の外部導体５として編組５を設け、更にこの外周に外被６を設けてなる同軸ケーブルであって、前記金属ＰＥＴテープ４のＰＥＴテープ４ｂとして、引っ張り強さが３００〜４００MPaで、伸びが５０〜１１０％の高強度ＰＥＴテープ４ｂを用いている。
A first embodiment of the coaxial cable of the present invention will be described with reference to FIG.
A coaxial cable 10 according to the present invention includes a metal PET tape 4 in which a metal foil 4a and a PET tape 4b are laminated as an inner outer conductor 4 on the outer periphery of a coaxial core 3 in which an insulator 2 is provided on the outer periphery of a central conductor 1. The coaxial cable is provided with a braid 5 as an outer external conductor 5 and an outer sheath 6 provided on the outer periphery of the outer conductor 5. The PET tape 4b of the metal PET tape 4 has a tensile strength of 300. A high-strength PET tape 4b having an elongation of 50 to 110% at ˜400 MPa is used.
例えば、中心導体１は外径0.200ｍｍの銅線の8本撚り線であり、また絶縁体２は発泡ＰＥ樹脂を０．５０ｍｍの厚さに被覆したものであり、また内側の外部導体４は厚さ８μｍの銅箔４ａと、引っ張り強さが３００MPa、伸びが５０％で厚さ２０μｍの高強度ＰＥＴテープ４ｂを張り合わせた銅ＰＥＴテープ４を縦添えしたものであり、また外側の外部導体５は外径０．１１ｍｍの軟銅線７０本の編組により形成した軟銅線編組５であり、更に外被６はＰＶＣ樹脂を０．４０ｍｍの厚さに熔融押し出ししたものである。 For example, the center conductor 1 is an eight strand wire of copper wire having an outer diameter of 0.200 mm, the insulator 2 is a foamed PE resin coated with a thickness of 0.50 mm, and the inner outer conductor 4 is A copper PET tape 4 having a tensile strength of 300 MPa, an elongation of 50%, and a high-strength PET tape 4b having a thickness of 20 μm is vertically attached to the copper foil 4a having a thickness of 8 μm. Is an annealed copper wire braid 5 formed by braiding 70 annealed copper wires having an outer diameter of 0.11 mm, and the outer sheath 6 is obtained by melt-extruding PVC resin to a thickness of 0.40 mm.
本発明の同軸ケーブルの第２実施例について図１を用いて説明する。
本実施例２の同軸ケーブルに用いる内側外部導体４として、銅箔４ａと、引っ張り強さが３５０MPaで伸びが８０％の高強度ＰＥＴテープ４ｂを張り合わせた銅ＰＥＴテープ４の縦添えを用いる他は上記実施例１と同様にして同軸ケーブル１０を製造した。
A second embodiment of the coaxial cable of the present invention will be described with reference to FIG.
As the inner outer conductor 4 used for the coaxial cable of the second embodiment, a copper foil 4a and a vertical attachment of a copper PET tape 4 laminated with a high strength PET tape 4b having a tensile strength of 350 MPa and an elongation of 80% are used. A coaxial cable 10 was manufactured in the same manner as in Example 1.
本発明の同軸ケーブルの第３実施例について図１を用いて説明する。
本実施例３の同軸ケーブルに用いる内側外部導体４として、銅箔４ａと、引っ張り強さが４００MPaで伸びが１１０％の高強度ＰＥＴテープ４ｂを張り合わせた銅ＰＥＴテープ４の縦添えを用いる他は上記実施例１と同様にして同軸ケーブル１０を製造した。
A third embodiment of the coaxial cable of the present invention will be described with reference to FIG.
As the inner outer conductor 4 used for the coaxial cable of Example 3, a copper foil 4a and a vertical attachment of a copper PET tape 4 laminated with a high strength PET tape 4b having a tensile strength of 400 MPa and an elongation of 110% are used. A coaxial cable 10 was manufactured in the same manner as in Example 1.
上記実施例１〜３により得られた同軸ケーブルは、同軸ケーブルとしての各種電気特性が良好であった。またこれらの同軸ケーブルについて、所定量の伸び、振動の外力を負荷した後に、減衰特性を試験したところ、外力負荷前のケーブルと比較して減衰特性の劣化はなかった。また、外力負荷後のケーブルを分解して銅ＰＥＴテープの銅箔の表面を拡大鏡を用いて確認したところ、銅箔に亀裂の発生が無かった。 The coaxial cables obtained in Examples 1 to 3 had good various electrical characteristics as coaxial cables. In addition, when these coaxial cables were tested for attenuation characteristics after applying a predetermined amount of elongation and external force of vibration, there was no deterioration of the attenuation characteristics compared to the cables before external force loading. Moreover, when the cable after external force load was decomposed | disassembled and the surface of the copper foil of copper PET tape was confirmed using the magnifier, there was no generation | occurrence | production of a crack in copper foil.
本発明の同軸ケーブルが配線されている各種電子機器の該ケーブルに張力、振動などの外力が加わった場合、金属ＰＥＴテープの金属箔の亀裂発生を無くす、または低減させることができ、同軸ケーブルの減衰特性に悪影響を及ぼさないようになるので、各種電子機器の性能の低下が無くなる。また高強度ＰＥＴテープは伸びの少ない特徴も在るため、たとえ金属箔に亀裂が入った場合でも同時に切断する可能性が高く、連続して金属箔に亀裂が多発することを防止できるようになる。従って、張力、振動などの外力が加わる各種電子機器、例えばＥＴＣに安心して使用することができる。 When an external force such as tension or vibration is applied to the cables of various electronic devices to which the coaxial cable of the present invention is wired, the occurrence of cracks in the metal foil of the metal PET tape can be eliminated or reduced. Since the attenuation characteristic is not adversely affected, the performance of various electronic devices is not degraded. In addition, since the high-strength PET tape also has a feature of low elongation, even if the metal foil is cracked, there is a high possibility of cutting at the same time, and it becomes possible to prevent the metal foil from being continuously cracked. . Therefore, it can be safely used for various electronic devices to which external force such as tension and vibration is applied, for example, ETC.
１ 中心導体
２ 絶縁体
３ 同軸芯
４ 内側の外部導体（金属箔ＰＥＴラミネートテープ縦添え）
４ａ 金属箔
４ｂ 高強度ＰＥＴテープ（ＰＥＴテープ）
５ 外側の外部導体（編組）
６ 外被
１０ 同軸ケーブル
1 Center conductor 2 Insulator 3 Coaxial core 4 Inner outer conductor (with metal foil PET laminate tape vertically)
4a Metal foil 4b High-strength PET tape (PET tape)
5 Outer outer conductor (braided)
6 Outer jacket 10 Coaxial cable
Claims (1)
前記金属箔ＰＥＴラミネートテープ４のＰＥＴテープ４ｂとして、引っ張り強さが３００〜４００MPaで、伸びが５０〜１１０％の高強度ＰＥＴテープを用いたことを特徴とする同軸ケーブル１０。
A metal foil PET laminate tape 4 in which a metal foil 4a and a PET (polyethylene terephthalate) tape 4b are laminated as an inner outer conductor 4 is vertically attached to the outer periphery of a coaxial core 3 formed by providing an insulator 2 on the outer periphery of the center conductor 1. A coaxial cable in which a braid 5 is provided as an outer external conductor 5 thereon, and a jacket 6 is further provided on the outer periphery;
A coaxial cable 10 using a high-strength PET tape having a tensile strength of 300 to 400 MPa and an elongation of 50 to 110% as the PET tape 4b of the metal foil PET laminate tape 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004145755A JP4333993B2 (en) | 2004-05-17 | 2004-05-17 | coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004145755A JP4333993B2 (en) | 2004-05-17 | 2004-05-17 | coaxial cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005327641A JP2005327641A (en) | 2005-11-24 |
| JP4333993B2 true JP4333993B2 (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2004145755A Expired - Fee Related JP4333993B2 (en) | 2004-05-17 | 2004-05-17 | coaxial cable |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8816208B2 (en) * | 2010-09-30 | 2014-08-26 | Hitachi Metals, Ltd. | Flat cable and cable harness using the same |
| DE102017118445A1 (en) * | 2017-08-14 | 2019-02-14 | Metzner Maschinenbau Gmbh | Method and device for removing a cable foil |
| WO2020004132A1 (en) | 2018-06-25 | 2020-01-02 | 日星電気株式会社 | Coaxial cable |
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2004
- 2004-05-17 JP JP2004145755A patent/JP4333993B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| JP2005327641A (en) | 2005-11-24 |
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