WO2013051096A1 - 信号伝送ケーブル用中空コア体 - Google Patents
信号伝送ケーブル用中空コア体 Download PDFInfo
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- WO2013051096A1 WO2013051096A1 PCT/JP2011/072816 JP2011072816W WO2013051096A1 WO 2013051096 A1 WO2013051096 A1 WO 2013051096A1 JP 2011072816 W JP2011072816 W JP 2011072816W WO 2013051096 A1 WO2013051096 A1 WO 2013051096A1
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- WIPO (PCT)
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- signal transmission
- core body
- transmission cable
- hollow
- hollow core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1834—Construction of the insulation between the conductors
- H01B11/1856—Discontinuous insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1808—Construction of the conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0006—Apparatus or processes specially adapted for manufacturing conductors or cables for reducing the size of conductors or cables
Definitions
- the present invention relates to a hollow core body for a signal transmission cable, and more particularly, a hollow core body for a signal transmission cable in which mechanical strength is prevented from being weakened due to a concave portion present on an outer peripheral surface of an inner conductor made of a collection line.
- a hollow core body for a signal transmission cable in which mechanical strength is prevented from being weakened due to a concave portion present on an outer peripheral surface of an inner conductor made of a collection line.
- an inner conductor 16 using a twisted wire obtained by gathering a plurality of strands 6, 6,...
- the hollow core body 600 for signal transmission cables provided with the hollow insulation core 60 which has 64 is known (for example, refer patent document 1, 2).
- a single wire is not used for the internal conductor 16 but a stranded wire is used. This is to obtain the flexibility and flexibility necessary for a signal transmission cable.
- a valley is formed between the adjacent wires 6, 6,...
- the resin may not enter the recesses 66, 66,... .. Where the ribs 62, 62,... Are located immediately above the remaining recesses 66, 66,...
- an object of the present invention is to provide a hollow core body for a signal transmission cable, in which the mechanical strength is suppressed from being weakened due to the concave portion present on the outer peripheral surface of the inner conductor made of the assembly line.
- the present invention provides an inner conductor (11, 12, 13) using an assembly line in which a plurality of strands are assembled, and an inner ring portion that covers the inner conductor (11, 12, 13).
- a hollow core body for a signal transmission cable comprising a hollow insulating core (20) having a plurality of hollow portions (24) surrounded by a rib portion (22) and an outer ring portion (23), wherein the inner conductor (11, 12, 13) collects a plurality of strands (1, 2, 3) and compresses them into a substantially circular cross section, or has a corner portion equal to or more than the number of the rib portions (22).
- a compressed assembly wire obtained by collecting a plurality of strands (1, 2, 3) and compressing them into a substantially circular cross section or a substantially polygonal cross section is provided.
- the inner conductor (11, 12, 13) since there is almost no recess on the outer peripheral surface of the compression assembly line, it is mechanical due to the recess existing on the outer peripheral surface of the inner conductor (11, 12, 13). It can suppress that intensity falls.
- the outer surface shape is not easily collapsed from the circular shape, so that the outer surface shape of the outer ring portion (63) is also not easily broken from the circular shape. Can be suppressed.
- the present invention is characterized in that, in the hollow core body for signal transmission cable (100 to 300) according to the first aspect, the compression rate of the compressed assembly line is 10% to 30%.
- a hollow core body (100 to 300) for a signal transmission cable is provided. If the compression rate of the compressed aggregate line is less than 10%, a concave portion remains on the outer peripheral surface of the compressed aggregate line, so that a sufficient effect cannot be obtained. On the other hand, if the compression rate of the compressed aggregate wire is larger than 30%, the wires (1, 2, 3) are frequently disconnected. Therefore, it is preferable that the compression rate of the compressed assembly line is 10% to 30%.
- the present invention relates to the signal transmission cable hollow core body (100 to 300) according to the first aspect or the second aspect, wherein the compressed assembly line includes a plurality of strands (1, 2, 2). 3) A hollow core body (100 to 300) for a signal transmission cable, which is obtained by compressing a twisted wire obtained by assembling 3).
- the hollow core body (100 to 300) for signal transmission cable according to the third aspect since twisted wires are used, necessary and sufficient flexibility and flexibility can be obtained as a coaxial cable.
- the present invention provides the signal transmission cable hollow core (100 to 300) according to the first or second aspect, wherein the compressed assembly line includes a plurality of strands (1, 2, 3).
- the ribs (22) of the hollow insulating core (20) are not positioned at the boundary between the outermost strand and the strand of the compressed assembly wire.
- a hollow core body (100 to 300) for a signal transmission cable is provided.
- the rib portion (22) is formed at the boundary between the outermost strand and the strand of the compressed assembly line. It is possible to maintain a positional relationship that does not exist.
- the mechanical strength can be improved.
- FIG. 1 is a cross-sectional view showing a hollow core body for a signal transmission cable according to Embodiment 1.
- FIG. 6 is a cross-sectional view showing a hollow core body for a signal transmission cable according to Embodiment 2.
- FIG. 6 is a cross-sectional view showing a hollow core body for a signal transmission cable according to Embodiment 3.
- FIG. It is sectional drawing which shows the assembly line used for the hollow core body for signal transmission cables which concerns on Example 3.
- FIG. It is sectional drawing which shows the hollow core body for signal transmission cables which concerns on a prior art example. It is sectional drawing which shows the modification by the side pressure load of the hollow core body for signal transmission cables which concerns on a prior art example.
- FIG. 1 is a cross-sectional view illustrating a hollow core body 100 for a signal transmission cable according to the first embodiment.
- the signal transmission cable hollow core body 100 includes an inner conductor 11 and a hollow insulating core 20.
- the inner conductor 11 is a compressed assembly wire in which seven strands 1, 1,... Are assembled and twisted and compressed into a substantially circular cross section.
- the element wire 1 is an annealed copper round wire having a wire diameter of 0.20 mm, for example.
- the compression rate of the compressed aggregate wire is, for example, 20%, and the outer diameter of the inner conductor 11 is, for example, 0.48 mm.
- the resistance value of the inner conductor 11 is, for example, 113.6 ⁇ / km.
- the hollow insulating core 20 includes an inner ring portion 21 covering the inner conductor 11, six rib portions 22, 22,... Extending radially from the inner ring portion 21, and the rib portions 22, 22,.
- a thickness T1 of the thinnest portion of the inner ring portion 21 is, for example, 0.03 mm.
- the rib portion 22 has a rectangular cross section, and its thickness T2 is, for example, 0.075 mm.
- a thickness T3 of the outer ring portion 23 is, for example, 0.06 mm.
- the outer diameter of the outer ring portion 23 is 1.17 mm, for example. That is, T1 ⁇ T3 ⁇ T2.
- the cross-sectional area ratio ( hollow ratio) of the hollow portions 24, 24,...
- the cross-sectional area of the hollow insulating core 20 is, for example, 45%.
- the hollow insulating core 20 is formed by extruding, for example, FEP resin on the outer periphery of the inner conductor 11 running on the extrusion die.
- the production speed is, for example, 30 m / min.
- the outer periphery of the signal transmission cable hollow core body 100 is surrounded by an outer conductor, and the outer periphery of the outer conductor is surrounded by an insulating coating to form a coaxial cable having a characteristic impedance of about 50 ⁇ .
- the attenuation of the coaxial cable was 0.77 dB / m (1 GHz, 20 ° C.). Further, when a change in characteristic impedance was observed by applying a side pressure load with a width of 2 mm to the coaxial cable, the characteristic impedance was reduced by 2% at a side pressure load of 800 g.
- a twisted wire in which seven strands were gathered and twisted was used.
- the strand is, for example, an annealed copper round wire having a wire diameter of 0.16 mm.
- the outer diameter of the inner conductor is, for example, 0.48 mm (same as in Example 1). Further, the resistance value of the inner conductor is 126.6 ⁇ / km, for example.
- the thickness of the thinnest part of the inner ring part of the hollow insulating core is, for example, 0.04 mm.
- the thickness of the outer ring portion is, for example, 0.06 mm.
- the outer diameter of the outer ring portion is, for example, 1.17 mm (same as Example 1).
- the hollow insulating core is formed by extruding, for example, FEP resin on the outer periphery of the inner conductor running on the extrusion die.
- the production speed is, for example, 20 m / min.
- the outer periphery of the hollow core body for signal transmission cable is surrounded by an outer conductor, and the outer periphery of the outer conductor is surrounded by an insulating coating to form a coaxial cable having a characteristic impedance of about 50 ⁇ .
- the attenuation of the coaxial cable was 0.83 dB / m (1 GHz, 20 ° C.). Further, when a side pressure load was applied to the coaxial cable with a width of 2 mm and a change in characteristic impedance was observed, the characteristic impedance was reduced by 2% at a side pressure load of 700 g.
- the side pressure load at which the characteristic impedance was reduced by 2% was larger than that of the comparative example, and the mechanical strength was improved. Further, the resistance value of the inner conductor could be lowered as compared with the comparative example with the same outer diameter of the inner conductor. Moreover, the production rate could be increased as compared with the comparative example. Furthermore, the attenuation of the coaxial cable could be reduced as compared with the comparative example.
- FIG. 2 is a cross-sectional view illustrating a hollow core body 200 for a signal transmission cable according to the second embodiment.
- the hollow core body 200 for signal transmission cable uses, as the inner conductor 12, a compressed assembly wire in which six enamel-coated strands 2, 2,... Other than that, the configuration is the same as in the first embodiment.
- FIG. 3 is a cross-sectional view illustrating a hollow core body 300 for a signal transmission cable according to the third embodiment.
- the hollow core body 300 for signal transmission cable uses, as the inner conductor 13, a compressed assembly wire in which nine copper alloy round wires 3, 3,... Are gathered and twisted and compressed into a substantially octagonal cross section. Other than that, the configuration is the same as in the first embodiment.
- FIG. 4 shows a cross section before the nine copper alloy round wires 3, 3,... Are compressed.
- the number of corners of the inner conductor 13 having a substantially polygonal cross section is closer to a circular cross section and the uniformity of the thickness of the inner ring portion 21 is increased. It is not preferable to make the number of corners smaller than the number of rib portions 22 because the thickness of the inner ring portion 21 becomes excessively uneven.
- a plurality of strands are gathered and twisted.
- a plurality of strands may be gathered, bundled in parallel without being twisted, and compressed.
- the hollow insulating core 20 is formed by positioning and extruding so that the rib portion 22 of the hollow insulating core 20 is not positioned at the boundary position between the outermost strands of the parallel compression assembly line and the strands.
- Example 4 since parallel lines are used, it is possible to maintain a positional relationship in which the rib portion 22 is not positioned at the boundary position between the outermost strands of the compressed assembly line and the strands. For this reason, even if a concave portion remains at the boundary position between the outermost strand of the compressed assembly line and the strand, the rib portion 22 is not positioned in the concave portion, so that the mechanical strength is prevented from being weakened. I can do it.
- the hollow core body for a signal transmission cable of the present invention can be used as a core body of a signal transmission coaxial cable.
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Abstract
Description
しかし、内部導体16の最外周において隣接する素線6,6,……間には谷間が生じて凹部66,66,……となる。このため、押出成形により内部導体16の外周に中空絶縁コア60を形成するときに、樹脂が凹部66,66,……にうまく入らず、空隙が残ることがある。そして、この空隙の残った凹部66,66,……の直上にリブ部62,62,……が位置する箇所(内部導体16が撚り線であるため、そのような箇所が必ず生じる)では機械的強度が弱くなり、図6に示すように側圧荷重Pが加わると変形しやすくなる問題点がある。また、内環部61の厚さが不均一になるため断面外形が円形から崩れやすく、それにより外環部63の断面外形も円形から崩れやすくなり、この点でも機械的強度が弱くなってしまう問題点がある。
そこで、本発明の目的は、集合線からなる内部導体の外周面に存在する凹部に起因して機械的強度が弱まることを抑制した信号伝送ケーブル用中空コア体を提供することにある。
上記第1の観点による信号伝送ケーブル用中空コア体(100~300)では、複数の素線(1,2,3)を集合させて断面略円形又は断面略多角形に圧縮した圧縮集合線を内部導体(11,12,13)として用いるが、圧縮集合線の外周面にはほとんど凹部が生じないため、内部導体(11,12,13)の外周面に存在する凹部に起因して機械的強度が弱まることを抑制することが出来る。また、内環部(21)の厚さの均一性が向上するため外面形状が円形から崩れにくく、それにより外環部(63)の外面形状も円形から崩れにくくなり、この点でも機械的強度が弱まることを抑制することが出来る。
圧縮集合線の圧縮率が10%より小さいと、圧縮集合線の外周面に凹部が残るため、十分な効果が得られない。一方、圧縮集合線の圧縮率が30%より大きいと、素線(1,2,3)の断線が多発する。このため、圧縮集合線の圧縮率を10%~30%とするのが好ましい。
上記第3の観点による信号伝送ケーブル用中空コア体(100~300)では、撚り線を用いているため、同軸ケーブルとして必要十分な柔軟性・屈曲性を得ることが出来る。
上記第4の観点による信号伝送ケーブル用中空コア体(100~300)では、平行線を用いているため、圧縮集合線の最外周の素線と素線の境界位置にリブ部(22)が位置しないような位置関係を維持できる。このため、圧縮集合線の最外周の素線と素線の境界位置にもしも凹部が残っていた場合でも、その凹部にリブ部(22)が位置しないから、機械的強度が弱まることを抑制することが出来る。
図1は、実施例1に係る信号伝送ケーブル用中空コア体100を示す断面図である。
この信号伝送ケーブル用中空コア体100は、内部導体11と、中空絶縁コア20とを具備してなる。
素線1は、例えば線径0.20mmの軟銅丸線である。
圧縮集合線の圧縮率は例えば20%であり、内部導体11の外径は例えば0.48mmである。また、内部導体11の抵抗値は、例えば113.6Ω/kmである。
リブ部22は、断面矩形であり、その厚さT2は例えば0.075mmである。
外環部23の厚さT3は、例えば0.06mmである。外環部23の外径は、例えば1.17mmである。
すなわち、T1<T3<T2になっている。
その同軸ケーブルの減衰量は、0.77dB/m(1GHz,20℃)であった。
また、その同軸ケーブルに、2mm幅で側圧荷重を加えて特性インピーダンスの変化を観測したところ、側圧荷重800gで特性インピーダンスが2%減少した。
内部導体として、7本の素線を集合させて撚った撚り線を用いた。
素線は、例えば線径0.16mmの軟銅丸線である。
内部導体の外径は、例えば0.48mmである(実施例1と同じ)。また、内部導体の抵抗値は、例えば126.6Ω/kmである。
リブ部は、6本であり(実施例1と同じ)、それぞれ断面矩形であり(実施例1と同じ)、その厚さは例えば0.065mmである(実施例1より細い)。
外環部の厚さは、例えば0.06mmである。外環部の外径は、例えば1.17mmである(実施例1と同じ)。
中空絶縁コアの断面積(内部導体の断面積は含まない)に対する中空部の断面積比率(=中空率)は、例えば45%である(実施例1と同じ)。
その同軸ケーブルの減衰量は、0.83dB/m(1GHz,20℃)であった。
また、その同軸ケーブルに、2mm幅で側圧荷重を加えて特性インピーダンスの変化を観測したところ、側圧荷重700gで特性インピーダンスが2%減少した。
図2は、実施例2に係る信号伝送ケーブル用中空コア体200を示す断面図である。
この信号伝送ケーブル用中空コア体200は、内部導体12として、6本のエナメル被覆素線2,2,……を集合させて撚り、断面略円形に圧縮した圧縮集合線を用いている。それ以外は実施例1と同じ構成である。
図3は、実施例3に係る信号伝送ケーブル用中空コア体300を示す断面図である。
この信号伝送ケーブル用中空コア体300は、内部導体13として、9本の銅合金丸線3,3,……を集合させて撚り、断面略八角形に圧縮した圧縮集合線を用いている。それ以外は実施例1と同じ構成である。なお、図4に、9本の銅合金丸線3,3,……を圧縮する前の断面を示す。
実施例1~実施例3では複数の素線を集合させて撚っているが、複数の素線を集合させて、撚らずに、平行に束ねて、それを圧縮してもよい。そして、その平行圧縮集合線の最外周の素線と素線の境界位置に中空絶縁コア20のリブ部22が位置しないように位置決めして押出成形し、中空絶縁コア20を成形する。
11,12,13,16 内部導体
20,60 中空絶縁コア
21,61 内環部
22,62 リブ部
23,63 外環部
24,64 中空部
66 凹部
100~300 信号伝送ケーブル用中空コア体
P 側圧荷重
Claims (4)
- 複数の素線を集合させた集合線を用いた内部導体(11,12,13)と、前記内部導体(11,12,13)を被覆する内環部(21)と前記内環部(21)から放射状に延びる複数のリブ部(22)と前記リブ部(22)の外端を連結する外環部(23)と前記内環部(21)及びリブ部(22)及び外環部(23)で囲まれた複数の中空部(24)とを有する中空絶縁コア(20)とを備えた信号伝送ケーブル用中空コア体であって、前記内部導体(11,12,13)は、複数の素線(1,2,3)を集合させて断面略円形に圧縮するか又は前記リブ部(22)の数と同じかそれより多い角部を有する断面略多角形に圧縮した圧縮集合線であることを特徴とする信号伝送ケーブル用中空コア体(100~300)。
- 請求項1に記載の信号伝送ケーブル用中空コア体(100~300)において、前記圧縮集合線の圧縮率は、10%~30%であることを特徴とする信号伝送ケーブル用中空コア体(100~300)。
- 請求項1または請求項2に記載の信号伝送ケーブル用中空コア体(100~300)において、前記圧縮集合線は、複数の素線(1,2,3)を集合させて撚った撚り線を圧縮したものであることを特徴とする信号伝送ケーブル用中空コア体(100~300)。
- 請求項1または請求項2に記載の信号伝送ケーブル用中空コア体(100~300)において、前記圧縮集合線は、複数の素線(1,2,3)を集合させて撚らずに束ねた平行線であり、前記中空絶縁コア(20)のリブ部(22)は、前記圧縮集合線の最外周の素線と素線の境界位置には位置しないことを特徴とする信号伝送ケーブル用中空コア体(100~300)。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN201180073642.9A CN103827983A (zh) | 2011-10-04 | 2011-10-04 | 用于信号传输电缆的中空芯体 |
JP2013537302A JP5952289B2 (ja) | 2011-10-04 | 2011-10-04 | 信号伝送ケーブル用中空コア体 |
US14/345,053 US9318238B2 (en) | 2011-10-04 | 2011-10-04 | Hollow core body for signal transmission cable |
PCT/JP2011/072816 WO2013051096A1 (ja) | 2011-10-04 | 2011-10-04 | 信号伝送ケーブル用中空コア体 |
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PCT/JP2011/072816 WO2013051096A1 (ja) | 2011-10-04 | 2011-10-04 | 信号伝送ケーブル用中空コア体 |
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WO2013051096A1 true WO2013051096A1 (ja) | 2013-04-11 |
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US (1) | US9318238B2 (ja) |
JP (1) | JP5952289B2 (ja) |
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JP7604913B2 (ja) * | 2021-01-28 | 2024-12-24 | 株式会社プロテリアル | 感圧センサ |
CN117043894A (zh) * | 2021-03-31 | 2023-11-10 | 住友电气工业株式会社 | 同轴电缆 |
JP6977198B1 (ja) * | 2021-10-05 | 2021-12-08 | 東京特殊電線株式会社 | 同軸ケーブル |
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JPWO2013051096A1 (ja) | 2015-03-30 |
CN103827983A (zh) | 2014-05-28 |
US9318238B2 (en) | 2016-04-19 |
US20150075840A1 (en) | 2015-03-19 |
JP5952289B2 (ja) | 2016-07-13 |
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