JP2003346567A - Communication cable - Google Patents

Communication cable

Info

Publication number
JP2003346567A
JP2003346567A JP2002151141A JP2002151141A JP2003346567A JP 2003346567 A JP2003346567 A JP 2003346567A JP 2002151141 A JP2002151141 A JP 2002151141A JP 2002151141 A JP2002151141 A JP 2002151141A JP 2003346567 A JP2003346567 A JP 2003346567A
Authority
JP
Japan
Prior art keywords
shaped
communication cable
insulated wire
interposition
wire
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.)
Pending
Application number
JP2002151141A
Other languages
Japanese (ja)
Inventor
Osamu Koyasu
修 子安
Kazunaga Kobayashi
和永 小林
Keiji Ohashi
圭二 大橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujikura Ltd
Original Assignee
Fujikura Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujikura Ltd filed Critical Fujikura Ltd
Priority to JP2002151141A priority Critical patent/JP2003346567A/en
Publication of JP2003346567A publication Critical patent/JP2003346567A/en
Pending legal-status Critical Current

Links

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication cable that can prevent deterioration in crosstalk characteristics. <P>SOLUTION: Four insulated wires 13 formed by covering an insulator 17 to a center conductor 15 are prepared. Then, the insulated wires 13 are accommodated and arranged in each groove 23 of a U-shaped type foaming interposition, an aluminum tape 19 is put along a vertical line or is wound spirally, and furthermore the outer periphery is covered with coating 21 for forming a communication cable 1, thus preventing the insulated wires 13 from moving to a section, and hence preventing the deterioration in the crosstalk characteristics. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、LAN構築に用い
られる通信ケーブルに関し、特に、複数本の絶縁電線が
集合配置された各絶縁電線間のクロストーク特性を向上
することができる通信ケーブルに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication cable used for LAN construction, and more particularly to a communication cable capable of improving crosstalk characteristics between insulated wires in which a plurality of insulated wires are collectively arranged.

【0002】[0002]

【従来の技術】従来、通信ケーブルとしては、図7
(a)に示すように、丸型介在101を中心に絶縁電線
103を集合配置し、次いでその外周にアルミテープを
縦添え又は螺旋巻きして、更にその外周に外被105を
被覆した構造からなる通信ケーブルが知られている。
2. Description of the Related Art Conventionally, as a communication cable, FIG.
As shown in (a), a structure in which insulated wires 103 are collectively arranged around a circular interposition 101, and then an aluminum tape is vertically attached or spirally wound on the outer periphery thereof, and a jacket 105 is further covered on the outer periphery. Communication cables are known.

【0003】また、図7(b)に示すように、絶縁電線
103に替えて2本の絶縁電線103を撚合せてなる対
撚線102を丸型介在101を中心に集合配置し、次い
でその外周にアルミテープを縦添え又は螺旋巻きして、
更にその外周に外被105を被覆した構造からなる通信
ケーブルが知られている。
As shown in FIG. 7 (b), a twisted pair wire 102 formed by twisting two insulated wires 103 in place of the insulated wire 103 is collectively arranged around a round interposition 101, and then, Vertically or spirally winding aluminum tape on the outer circumference,
Further, a communication cable having a structure in which a jacket 105 is coated on the outer periphery thereof is known.

【0004】図7(b)において絶縁電線103の撚込
みピッチは、各絶縁電線103間でクロストークが生じ
ないようにするために故意的に各対撚線102の撚込み
ピッチが異なるようにしている。
In FIG. 7B, the twisted pitch of the insulated wires 103 is deliberately set so that the twisted pitch of each pair of twisted wires 102 is different in order to prevent crosstalk between the insulated wires 103. ing.

【0005】[0005]

【発明が解決しようとする課題】図7(a)に示す丸型
介在101と絶縁電線103を用いた通信ケーブルは、
丸型形状の丸型介在101を中心にして、対向する絶縁
電線103間の距離を確保するのに効果があった。
The communication cable using the circular interposition 101 and the insulated wire 103 shown in FIG.
This was effective in securing the distance between the insulated wires 103 facing each other, with the round-shaped interposition 101 as the center.

【0006】しかしながら、このような複数本の絶縁電
線103を集合配置させる通信ケーブルの製造時におい
て、ボビンに巻かれた絶縁電線103を引き出し、パス
ラインを介して撚合わせて外皮を被覆する際に、このパ
スラインの通過時に絶縁電線103に曲げが加わり、絶
縁電線103の送り出し速度が微妙に異なってしまうこ
とから、単位ケーブル長当たりの絶縁電線103の長さ
が異なるという問題がある。そのため張力の高い絶縁電
線103はケーブルの中心方向へ押し込まれ、逆に隣接
する絶縁電線103が押し出されるので隣接距離が変動
し、クロストークの劣化が生じるという問題があった。
However, when manufacturing such a communication cable in which a plurality of insulated wires 103 are collectively arranged, when the insulated wire 103 wound around the bobbin is pulled out and twisted through a pass line to cover the outer sheath. However, when the insulated wire 103 is bent when passing through the pass line, the sending speed of the insulated wire 103 is slightly different, so that there is a problem that the length of the insulated wire 103 per unit cable length is different. Therefore, there is a problem that the insulated wire 103 having a high tension is pushed toward the center of the cable, and conversely, the adjacent insulated wire 103 is pushed out, so that the adjacent distance fluctuates and crosstalk is deteriorated.

【0007】また、従来より、クロストークの劣化を低
減させるために各絶縁電線103の撚込みピッチを変え
ている。つまり、ケーブルの設計段階で対撚線102の
撚込みピッチを設定し、これに従い撚込み率を決定して
いる。そしてこの撚込み率から単位長当たりの絶縁電線
103内のコア長を算出し各絶縁電線103の導体抵抗
量や減衰量を算出しているが、上記のように絶縁電線1
03の配列が乱れると算出したコア長が算出値から外れ
るため、結局は規格割れを起してしまうという問題があ
った。
Conventionally, the twisting pitch of each insulated wire 103 is changed in order to reduce the deterioration of crosstalk. That is, the twisting pitch of the twisted pair wire 102 is set in the cable design stage, and the twisting rate is determined according to the setting. The core length in the insulated wire 103 per unit length is calculated from the twisting rate to calculate the conductor resistance and the attenuation of each insulated wire 103.
Since the calculated core length deviates from the calculated value when the arrangement of No. 03 is disturbed, there is a problem that the standard may eventually be broken.

【0008】一方、現在一般的なLAN構築に用いられ
るLANケーブルは、10BASE若しくは100BA
SEを主としたものである。今後は伝送容量の拡大化や
伝送速度の高速化に伴い100BASEへの移行が計ら
れることが予測されることから、より電気特性の高いL
ANケーブルが要望される。
On the other hand, a LAN cable currently used for general LAN construction is 10BASE or 100BA.
Mainly SE. In the future, it is expected that the shift to 100 BASE will be made with the expansion of transmission capacity and the increase of transmission speed.
An AN cable is desired.

【0009】また、規格制定まじかなCAT6ケーブル
の場合は、周波数帯域が更に広がるため、更なる電気特
性の確保が重要となる。
[0009] In the case of a CAT6 cable which is strictly standardized, since the frequency band is further expanded, it is important to secure further electrical characteristics.

【0010】本発明は、上記に鑑みてなされたもので、
その目的としては、クロストーク特性の劣化を防止し電
気特性を向上させる通信ケーブルを提供することにあ
る。
[0010] The present invention has been made in view of the above,
An object of the present invention is to provide a communication cable that prevents deterioration of crosstalk characteristics and improves electrical characteristics.

【0011】[0011]

【課題を解決するための手段】請求項1記載の発明は、
上記課題を解決するため、中心導体に絶縁体を被覆して
形成された絶縁電線と、絶縁電線の断面と略同一のU字
形状の空隙に絶縁電線を収容配置するU字型介在と、U
字型介在の外周を被覆する金属テープと、金属テープの
外周に絶縁体を被覆する外被とからなることを要旨とす
る。
According to the first aspect of the present invention,
In order to solve the above problem, an insulated wire formed by covering an insulator on a central conductor, a U-shaped interposition for accommodating and arranging the insulated wire in a U-shaped gap substantially the same as the cross section of the insulated wire,
The gist consists of a metal tape covering the outer periphery of the character-shaped interposition and a jacket covering the outer periphery of the metal tape with an insulator.

【0012】請求項2記載の発明は、上記課題を解決す
るため、中心導体に絶縁体を被覆して形成された絶縁電
線と、絶縁電線を2本撚り合わせて形成された対撚線
と、対撚線の撚り方向に形成される軌跡と略同一のU字
形状の空隙に前記対撚線を収容配置するU字型介在と、
U字型介在の外周を被覆する金属テープと、金属テープ
の外周に絶縁体を被覆する外被とからなることを要旨と
する。
According to a second aspect of the present invention, there is provided an insulated wire formed by coating an insulator on a center conductor, and a twisted pair wire formed by twisting two insulated wires. U-shaped interposition for accommodating and disposing the twisted pair wire in a U-shaped space substantially the same as the locus formed in the twisting direction of the twisted pair wire,
The gist consists of a metal tape covering the outer periphery of the U-shaped interposition and a jacket covering the outer periphery of the metal tape with an insulator.

【0013】請求項3記載の発明は、上記課題を解決す
るため、U字型介在は、外被の内側の曲率と略同一曲率
で外被に外接する扇型隔壁を有することを要旨とする。
According to a third aspect of the present invention, in order to solve the above-mentioned problem, the gist of the present invention is that the U-shaped interposition has a fan-shaped partition wall circumscribing the outer casing with substantially the same curvature as the inner curvature of the outer casing. .

【0014】請求項4記載の発明は、上記課題を解決す
るため、扇型隔壁は、絶縁電線の外側の曲率と略同一曲
率で絶縁電線に内接する内接面を有することを要旨とす
る。
According to a fourth aspect of the present invention, in order to solve the above problem, the fan-shaped partition wall has an inscribed surface inscribed in the insulated wire at substantially the same curvature as the outer curvature of the insulated wire.

【0015】請求項5記載の発明は、上記課題を解決す
るため、扇型隔壁は、対撚線の外側の曲率と略同一曲率
で対撚線に内接する内接面を有することを要旨とする。
According to a fifth aspect of the present invention, in order to solve the above problem, the fan-shaped partition wall has an inscribed surface inscribed in the twisted pair with substantially the same curvature as the outer curvature of the twisted pair. I do.

【0016】請求項6記載の発明は、上記課題を解決す
るため、U字型介在は、ポリエチレン又はテフロンを発
泡させてなる発泡性材料からなることを要旨とする。
According to a sixth aspect of the present invention, in order to solve the above-mentioned problems, the gist of the invention is that the U-shaped interposition is made of a foamable material obtained by foaming polyethylene or Teflon.

【0017】請求項7記載の発明は、上記課題を解決す
るため、U字型介在の発泡率は、30〜70%であるこ
とを要旨とする。請求項8記載の発明は、上記課題を解
決するため、U字型介在は、U字形状の空隙を4つ有す
ることを要旨とする。
According to a seventh aspect of the present invention, in order to solve the above-mentioned problems, the gist of the invention is that the foaming ratio of the U-shaped interposition is 30 to 70%. According to an eighth aspect of the present invention, in order to solve the above-mentioned problem, the gist of the present invention is that the U-shaped interposition has four U-shaped gaps.

【0018】[0018]

【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0019】(第1の実施の形態)図1は、本発明の第
1の実施の形態に係る通信ケーブル1の構成を示す断面
図である。図2は、U字型発泡介在11の構成を示す断
面図である。
(First Embodiment) FIG. 1 is a sectional view showing a configuration of a communication cable 1 according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating the configuration of the U-shaped foamed intervention 11.

【0020】通信ケーブル1は、4つの溝23を備えた
U字型発泡介在11に4本の絶縁電線13がそれぞれ収
容配置され、その外周が金属テープ19で縦沿え又は螺
旋巻きされ、更に金属テープ19の外周が外被21によ
り被覆されている。
In the communication cable 1, four insulated wires 13 are respectively accommodated and arranged in a U-shaped foamed intermediate member 11 having four grooves 23, and the outer periphery thereof is vertically or spirally wound with a metal tape 19, and furthermore, the The outer periphery of the tape 19 is covered with a jacket 21.

【0021】U字型発泡介在11は、図2に示すよう
に、丸型形状の介在の4方に絶縁電線13の曲率と略同
一曲率を有するU字型の溝23を備え、この溝23に絶
縁電線13が挿入されるように形成されている。
As shown in FIG. 2, the U-shaped foamed interposition 11 has a U-shaped groove 23 having substantially the same curvature as the curvature of the insulated wire 13 on four sides of the round-shaped interposition. The insulated wire 13 is formed so as to be inserted into the wire.

【0022】詳しくは、このU字型発泡介在11は、断
面の中心から4方に90度ずらした4箇所に絶縁電線1
3の曲率と略同一曲率を有するU字型の溝23を備え、
この溝23は、絶縁電線13の外周の曲率と略同一曲率
を有する半円の内接面27と、この半円の端から外側に
向かって垂直に設けられる隔壁からなっている。即ち、
隣り合う溝23の間には扇型隔壁29が4つ形成され
る。
More specifically, the U-shaped foamed intermediate member 11 has the insulated wires 1 at four locations shifted by 90 degrees in four directions from the center of the cross section.
3 having a U-shaped groove 23 having substantially the same curvature as the curvature of 3
The groove 23 includes a semicircular inscribed surface 27 having substantially the same curvature as the curvature of the outer periphery of the insulated wire 13, and a partition wall provided vertically from an end of the semicircle to the outside. That is,
Four fan-shaped partition walls 29 are formed between the adjacent grooves 23.

【0023】また、扇型隔壁29は、外被21の内側の
曲率と略同一曲率で外被21に外接する外接面25を有
しており、また、絶縁電線13の外周の曲率と略同一曲
率で絶縁電線13に内接する内接面27を有している。
The fan-shaped partition wall 29 has a circumscribing surface 25 circumscribing the outer cover 21 at substantially the same curvature as the inner curvature of the outer cover 21, and has substantially the same curvature as the outer periphery of the insulated wire 13. It has an inscribed surface 27 that inscribes the insulated wire 13 with a curvature.

【0024】尚、各絶縁電線13は、中心導体15に樹
脂等の絶縁体17を被覆して形成されている。
Each insulated wire 13 is formed by covering the central conductor 15 with an insulator 17 such as a resin.

【0025】次に、図3を参照して、4本の絶縁電線1
3を備える通信ケーブル1の諸元を説明する。
Next, referring to FIG. 3, four insulated wires 1
3 will be described.

【0026】中心導体15の外径は、例えば0.6mm
であり、銀メッキ銅線又は錫メッキ銅線等を用いるのが
好ましい。銀メッキ銅線を用いた場合、高周波側での信
号減衰量の改善に効果的である。
The outer diameter of the center conductor 15 is, for example, 0.6 mm.
It is preferable to use a silver-plated copper wire or a tin-plated copper wire. The use of a silver-plated copper wire is effective in improving the signal attenuation on the high frequency side.

【0027】中心導体15に絶縁体17を被覆したとき
の外径(絶縁電線103の外径)は、例えば1.4mm
であり、このとき絶縁体17の材質は、ポリエチレンP
Eが好ましく、発泡構造(発泡層)でもスキンホーム構
造(スキン層)でもよい。絶縁体17にポリエチレンP
E等を用いた場合、誘電率を低下できると共に電気特性
の向上や可とう性の向上に効果的である。
The outer diameter (outer diameter of the insulated wire 103) when the center conductor 15 is covered with the insulator 17 is, for example, 1.4 mm.
At this time, the material of the insulator 17 is polyethylene P
E is preferable, and it may be a foamed structure (foamed layer) or a skin home structure (skin layer). Polyethylene P for insulator 17
When E or the like is used, the dielectric constant can be reduced, and it is effective for improving the electric characteristics and the flexibility.

【0028】U字型発泡介在11の外径は、例えば4.
2mmであり、このときU字型発泡介在11の材質は、
発泡性を有するポリエチレンPE等が好ましい。U字型
発泡介在11に発泡させたポリエチレンPE等を用いた
場合、誘電率を低下できると共に電気特性の向上や可と
う性の向上に効果的である。
The outer diameter of the U-shaped foamed intermediate 11 is, for example, 4.
2 mm. At this time, the material of the U-shaped foamed intermediate 11 is
Foamable polyethylene PE is preferred. The use of foamed polyethylene PE or the like for the U-shaped foamed intermediate 11 is effective in lowering the dielectric constant and improving the electrical characteristics and the flexibility.

【0029】なお、U字型発泡介在11に絶縁電線13
を収容したときの通信ケーブル1の外径は5.5mmと
なる。
It is to be noted that the insulated electric wire 13 is
Is accommodated, the outer diameter of the communication cable 1 is 5.5 mm.

【0030】また、図3には示してないが、金属テープ
19は、例えば厚さ0.06mm、幅12mmのアルミ
テープや銅テープが好ましく、巻き付け易いようにテー
プの片面には樹脂性の層や接着性のある層を設け、外被
21と絶縁体17の密着性を向上させる。外被21の材
質としては、ポリ塩化ビニルPVC、ポリオレフィン系
材からなるリサイクル利用可能なエコ材、NHPE材が
好ましい。
Although not shown in FIG. 3, the metal tape 19 is preferably, for example, an aluminum tape or a copper tape having a thickness of 0.06 mm and a width of 12 mm. Or an adhesive layer is provided to improve the adhesion between the jacket 21 and the insulator 17. As the material of the outer cover 21, a recyclable eco-friendly material made of polyvinyl chloride PVC, a polyolefin-based material, and an NHPE material are preferable.

【0031】次にU字型発泡介在11の発泡率について
詳しく説明する。
Next, the foaming ratio of the U-shaped foamed intermediate 11 will be described in detail.

【0032】図4に、U字型発泡介在11の材質として
ポリエチレンPEを用いた場合の合成誘電率と、テフロ
ンを用いた場合の合成誘電率を発泡率毎にまとめた比較
結果を示す。
FIG. 4 shows a comparison result in which the composite dielectric constant when polyethylene PE is used as the material of the U-shaped foamed intermediate 11 and the composite dielectric constant when Teflon is used are summarized for each foaming ratio.

【0033】同図に示すように、U字型発泡介在11の
ポリエチレンPEの合成誘電率及びテフロンの合成誘電
率は、発泡率が0%のとき、それぞれ2.3、2.1で
あった。また、発泡率が10%のとき、それぞれ2.1
4、1.97であった。発泡率が20%のとき、それぞ
れ1.99、1.84であった。以下同様に、発泡率が
30%のとき、それぞれ1.85、1.72、発泡率が
40%のとき、それぞれ1.71、1.61、発泡率が
50%、それぞれ1.58、1.50、発泡率が60%
のとき、それぞれ1.46、1.39、発泡率が70%
のとき、それぞれ1.34、1.29、発泡率が80%
のとき、それぞれ1.22、1.19であった。
As shown in the figure, the synthetic dielectric constant of polyethylene PE and the synthetic dielectric constant of Teflon of U-shaped foamed intermediate 11 were 2.3 and 2.1 when the foaming ratio was 0%. . Further, when the foaming rate is 10%, 2.1
4, 1.97. When the foaming ratio was 20%, they were 1.99 and 1.84, respectively. Similarly, when the foaming ratio is 30%, the ratios are 1.85 and 1.72, respectively, and when the foaming ratio is 40%, the ratios are 1.71 and 1.61 and the foaming ratio is 50%, respectively. .50, foaming rate 60%
In the case of 1.46 and 1.39, respectively, the foaming ratio is 70%
In the case of 1.34 and 1.29, respectively, the foaming ratio is 80%
At that time, they were 1.22 and 1.19, respectively.

【0034】上記結果より、発泡率が高くなる程ポリエ
チレンPEとテフロンの合成誘電率は下がり、またポリ
エチレンPEとテフロンの合成誘電率を比較した結果か
らは、ポリエチレンPEよりテフロンの方が合成誘電率
が低く、テフロンがU字型発泡介在11により適用して
いることが示された。
From the above results, the higher the foaming ratio, the lower the composite dielectric constant of polyethylene PE and Teflon, and from the comparison of the composite dielectric constants of polyethylene PE and Teflon, the composite dielectric constant of Teflon is higher than that of polyethylene PE. Was low, indicating that Teflon was applied with a U-shaped foamed intermediate 11.

【0035】なお、これら発泡率は合成誘電率以外にケ
ーブルの可とう性にも影響する。つまり発泡率が高い程
ケーブルの軟性度が高く曲がり易い。しかし、U字型発
泡介在11の溝23に絶縁電線13を収容するためは絶
縁電線13に必要以上のテンションが掛からない程度の
強度が必要である。そこで発泡率は30〜70%の範囲
が好ましいことが実験から求められた。
The foaming rate affects the flexibility of the cable in addition to the composite dielectric constant. In other words, the higher the foaming ratio, the higher the flexibility of the cable and the easier it is to bend. However, in order to accommodate the insulated wire 13 in the groove 23 of the U-shaped foamed interposer 11, it is necessary that the insulated wire 13 has such a strength that unnecessary tension is not applied to the insulated wire 13. Therefore, it was determined from experiments that the foaming ratio is preferably in the range of 30 to 70%.

【0036】次に、図1を参照して、通信ケーブル1の
作用効果について説明する。
Next, the operation and effect of the communication cable 1 will be described with reference to FIG.

【0037】まず、中心導体15に絶縁体17を被覆し
て形成された絶縁電線13を4本準備しておく。次い
で、U字型発泡介在11のそれぞれの溝23に絶縁電線
13を収容配置し、外周にアルミテープ19を縦沿え又
は螺旋巻きし、更にその外周に外被21を被覆して通信
ケーブル1を形成する。
First, four insulated wires 13 formed by covering the central conductor 15 with the insulator 17 are prepared. Next, the insulated wires 13 are accommodated and arranged in the respective grooves 23 of the U-shaped foamed intermediate 11, the aluminum tape 19 is longitudinally or spirally wound around the outer periphery, and the outer periphery is further covered with the jacket 21 to cover the communication cable 1. Form.

【0038】この結果、絶縁電線13の外径と略同一形
状の4つの溝23を有するU字型発泡介在11に絶縁電
線13を収容配置して、それぞれの絶縁電線13を2つ
の扇型隔壁29とアルミテープ19及び外被21とで保
持することができるので、断面と平行方向に絶縁電線1
3が移動することを防止することができる。
As a result, the insulated wires 13 are accommodated and arranged in the U-shaped foamed intermediate member 11 having four grooves 23 having substantially the same shape as the outer diameter of the insulated wires 13, and each insulated wire 13 is divided into two fan-shaped partition walls. 29, the aluminum tape 19 and the jacket 21, so that the insulated wire 1
3 can be prevented from moving.

【0039】また、U字型発泡介在11は、外被21の
内側の曲率と略同一曲率で外被21に外接する外接面2
5を有するので、断面と平行方向に絶縁電線13が移動
することを防止することができる。
The U-shaped foamed intermediate member 11 has a circumscribing surface 2 circumscribing the outer cover 21 with substantially the same curvature as the inner curvature of the outer cover 21.
5, the insulated wire 13 can be prevented from moving in a direction parallel to the cross section.

【0040】更に、U字型発泡介在11の溝23は、絶
縁電線13の外径の曲率と略同一曲率で絶縁電線13に
内接する内接面27を有するので、断面と平行方向に絶
縁電線13が移動することを防止することができる。
Further, since the groove 23 of the U-shaped foamed intermediate member 11 has an inscribed surface 27 that is inscribed in the insulated wire 13 at substantially the same curvature as the outer diameter of the insulated wire 13, the insulated wire is parallel to the cross section. 13 can be prevented from moving.

【0041】また更に、U字型発泡介在11の扇型隔壁
29の外接面25の接面が広く、U字型発泡介在11の
断面が略円形形状であるので、アルミテープ19の巻付
け時や、外被17の押し出し成形時に外被17等が溝2
3に落ち込むことを防止するので、通信ケーブル1を円
形形状にすることができる。
Furthermore, since the contact surface of the circumscribed surface 25 of the fan-shaped partition wall 29 of the U-shaped foamed intermediate 11 is wide and the cross-section of the U-shaped foamed intermediate 11 is substantially circular, In addition, when the jacket 17 is extruded and formed, the jacket 17
3, so that the communication cable 1 can have a circular shape.

【0042】この結果、絶縁電線13の収容位置が固定
し、隣接する絶縁電線13同士の距離が変化することが
なくなるので、通信ケーブル1が有するクロストーク特
性の劣化を防止することができる。
As a result, the accommodation position of the insulated wires 13 is fixed and the distance between the adjacent insulated wires 13 does not change, so that the crosstalk characteristic of the communication cable 1 can be prevented from deteriorating.

【0043】また、絶縁電線13間の断面方向の距離が
従来より長めに保つことができるので、絶縁電線13の
クロストーク特性を低下させることができ、これにより
撚込みピッチを長めに取ることができるので撚込み時の
製造線速を上げることが可能となり製造コストの低減に
効果がある。
Further, since the distance in the cross-sectional direction between the insulated wires 13 can be kept longer than before, the crosstalk characteristics of the insulated wires 13 can be reduced, and thus the twisting pitch can be made longer. Therefore, the production linear speed at the time of twisting can be increased, which is effective in reducing the production cost.

【0044】更に、U字型発泡介在31の発泡率を30
〜70%とすることで、クロストークを抑制しつつ可と
う性が良好になるのでケーブルが曲げ易くなる。
Further, the foaming ratio of the U-shaped foamed intermediate 31 is set to 30
By setting it to 70%, the flexibility is improved while suppressing the crosstalk, so that the cable is easily bent.

【0045】(第2の実施の形態)図5は、本発明の第
2の実施の形態に係る通信ケーブル3の構成を示す断面
図である。
(Second Embodiment) FIG. 5 is a sectional view showing a configuration of a communication cable 3 according to a second embodiment of the present invention.

【0046】その特徴としては、図1の構成において、
絶縁電線13(4芯)に替えて、対撚線33(4対)を
収容することにある。
As a feature, in the configuration of FIG.
Instead of the insulated wire 13 (four cores), a twisted pair wire 33 (four pairs) is accommodated.

【0047】通信ケーブル3は、4つの溝35を備えた
U字型発泡介在31に、4本の対撚線33がそれぞれ収
容配置され、その外周が金属テープ19で縦沿え又は螺
旋巻きされ、更にこの金属テープ19の外周が外被17
により被覆されている。
In the communication cable 3, four pairs of twisted wires 33 are respectively accommodated and arranged in a U-shaped foamed intermediate member 31 having four grooves 35, and the outer periphery thereof is longitudinally or spirally wound with a metal tape 19. Further, the outer circumference of the metal tape 19 is
Covered with

【0048】図5に示すように、U字型発泡介在31
は、丸型形状の介在の4方に対撚線33の撚り方向に描
かれる軌跡の曲率と略同一曲率を有する溝35を備え、
この溝35に対撚線33が挿入されて形成される。
As shown in FIG.
Is provided with a groove 35 having substantially the same curvature as the curvature of the locus drawn in the twisting direction of the twisted pair wire 33 on four sides of the round-shaped interposition,
The twisted pair wire 33 is inserted into the groove 35 and formed.

【0049】尚、U字型発泡介在31は、溝35の内接
面37の曲率と対撚線33の撚り方向に描かれる軌跡の
曲率とを略同一にすることを除いては、第1の実施の形
態で説明したU字型発泡介在11とほぼ同一条件で製造
できる。そこでU字型発泡介在31の扇形隔壁29の説
明及びその曲率等についての説明は省略する。
It should be noted that the U-shaped foamed intermediate member 31 has the first shape except that the curvature of the inscribed surface 37 of the groove 35 and the curvature of the locus drawn in the twisting direction of the twisted pair wire 33 are substantially the same. It can be manufactured under substantially the same conditions as the U-shaped foamed intermediate 11 described in the embodiment. Therefore, description of the fan-shaped partition wall 29 of the U-shaped foamed intermediate member 31 and description of its curvature and the like are omitted.

【0050】次に、図6を参照して、4本の対撚線33
を備える通信ケーブル3の諸元を説明する。
Next, referring to FIG.
The specifications of the communication cable 3 provided with will be described.

【0051】中心導体15の外径は、例えば0.54m
mであり、銀メッキ銅線又は錫メッキ銅線等を用いるの
が好ましい。銀メッキ銅線を用いた場合、高周波側での
信号減衰量の改善に効果的である。
The outer diameter of the center conductor 15 is, for example, 0.54 m
m, and it is preferable to use a silver-plated copper wire, a tin-plated copper wire, or the like. The use of a silver-plated copper wire is effective in improving the signal attenuation on the high frequency side.

【0052】絶縁体17を被覆したときの外径は、例え
ば1.00mmであり、このとき絶縁体17の材質はポ
リエチレンPEが好ましく、発泡構造(発泡層)でもス
キンホーム構造(スキン層)でもよい。絶縁体17にポ
リエチレンPEを用いることで、誘電率を低下させるこ
とができると共に電気特性の向上や可とう性の向上に効
果的である。
The outer diameter of the insulator 17 when it is covered is, for example, 1.00 mm. At this time, the material of the insulator 17 is preferably polyethylene PE, regardless of the foam structure (foam layer) or the skin home structure (skin layer). Good. By using polyethylene PE for the insulator 17, it is possible to reduce the dielectric constant, and it is effective to improve the electric characteristics and the flexibility.

【0053】U字型発泡介在31の外径は、例えば6.
0mmであり、このときU字型発泡介在31の材質は、
発泡性を有するポリエチレンPE等が好ましい。U字型
発泡介在31に発泡させたポリエチレンPE等を用いた
場合、誘電率を低下できると共に電気特性の向上や可と
う性の向上に効果的である。
The outer diameter of the U-shaped foamed intermediate member 31 is, for example, 6.
0 mm. At this time, the material of the U-shaped foam
Foamable polyethylene PE is preferred. The use of foamed polyethylene PE or the like for the U-shaped foamed intermediate member 31 is effective in lowering the dielectric constant and improving the electrical characteristics and the flexibility.

【0054】尚、U字型発泡介在31に対撚線33を収
容したときの通信ケーブル3の外径は7.2mmとな
る。
The outer diameter of the communication cable 3 when the twisted pair wire 33 is accommodated in the U-shaped foamed intermediate member 31 is 7.2 mm.

【0055】また、図6には示してないが、金属テープ
19及び外被21については、第1の実施の形態と同様
であるので説明を省略する。
Although not shown in FIG. 6, the metal tape 19 and the outer cover 21 are the same as those in the first embodiment, and a description thereof will be omitted.

【0056】更に、U字型発泡介在33の発泡率も、図
4に示した発泡率と合成誘電率の関係と同様であるため
詳細説明を省略する。
Further, the foaming rate of the U-shaped foamed intervening member 33 is the same as the relationship between the foaming rate and the composite dielectric constant shown in FIG.

【0057】従って、発泡率と誘電率の関係は第1の実
施の形態の効果と同様に、発泡率が高くなる程、ポリエ
チレンPEとテフロンの合成誘電率は共に低下し、ポリ
エチレンPEの合成誘電率とテフロンの合成誘電率とを
比較した結果、ポリエチレンPEの合成誘電率よりテフ
ロンの合成誘電率が低く、テフロンがより介在に適して
いることが示された。
Therefore, the relationship between the foaming ratio and the dielectric constant is the same as the effect of the first embodiment, and as the foaming ratio increases, the composite dielectric constants of polyethylene PE and Teflon both decrease, and the composite dielectric constant of polyethylene PE decreases. As a result of comparing the dielectric constant with the synthetic dielectric constant of Teflon, it was shown that the synthetic dielectric constant of Teflon was lower than that of polyethylene PE, and that Teflon was more suitable for interposition.

【0058】また、発泡率は合成誘電率以外にケーブル
の可とう性にも影響し、発泡率が高い程ケーブルの軟性
度が高く曲がり易いが、対撚線33を溝35に収容する
ための強度が必要なことから、発泡率は30〜70%の
範囲が好ましいことが実験より示された。
The foaming rate also affects the flexibility of the cable in addition to the composite dielectric constant. The higher the foaming rate, the higher the flexibility of the cable and the easier it is to bend. Experiments have shown that the foaming rate is preferably in the range of 30 to 70% because strength is required.

【0059】次に、図5を参照して、通信ケーブル3の
作用効果について説明する。
Next, the operation and effect of the communication cable 3 will be described with reference to FIG.

【0060】まず、中心導体15に絶縁体17を被覆し
て形成された絶縁電線13を2本撚り合わせて対撚線3
3を形成し、このような対撚線33を4本準備してお
く。次いで、U字型発泡介在31の各溝35に対撚線3
3を収容配置し、外周にアルミテープ19を縦沿え又は
螺旋巻きし、更にその外周に外被21を被覆して通信ケ
ーブル3を形成する。
First, two insulated wires 13 formed by covering the center conductor 15 with the insulator 17 are twisted to form a twisted pair 3.
3 and four such twisted pair wires 33 are prepared. Next, the twisted wire 3 is inserted into each groove 35 of the U-shaped foamed intermediate member 31.
The communication cable 3 is formed by housing and arranging an aluminum tape 19 on the outer periphery thereof in a longitudinal or spiral manner, and further covering the outer periphery with a jacket 21.

【0061】この結果、対撚線33の撚込み軌跡の形状
と略同一形状の溝35を有するU字型発泡介在31に対
撚線33を収容配置して、それぞれの対撚線33を2つ
の扇型隔壁29とアルミテープ19及び外被21とで保
持することができるので、断面と平行方向に対撚線33
が移動することを防止することができる。
As a result, the twisted pair wires 33 are accommodated and disposed in the U-shaped foamed intervening member 31 having the groove 35 having substantially the same shape as the shape of the twisted locus of the twisted pair wires 33, and each twisted pair wire 33 is formed into two. Can be held by the two fan-shaped partition walls 29, the aluminum tape 19, and the jacket 21, so that the twisted pair wires 33 are parallel to the cross section.
Can be prevented from moving.

【0062】また、対撚線33間の断面方向の距離が従
来より長めに保つことができるので、対撚線33のクロ
ストーク特性を低下させることができ、これにより撚込
みピッチを長めに取ることができることから撚込み時の
製造線速を上げることが可能となりコストの低減に効果
がある。
Since the distance in the cross-sectional direction between the twisted pair wires 33 can be kept longer than before, the crosstalk characteristics of the twisted pair wires 33 can be reduced, and the twisting pitch can be made longer. Because of this, the production linear speed at the time of twisting can be increased, which is effective in reducing costs.

【0063】更に、U字型発泡介在31の発泡率を30
〜70%とすることで、クロストークを抑制しつつ可と
う性が良好になるのでケーブルが曲げ易くなる。
Further, the foaming ratio of the U-shaped foamed intermediate 31 is set to 30
By setting it to 70%, the flexibility is improved while suppressing the crosstalk, so that the cable is easily bent.

【0064】[0064]

【発明の効果】請求項1記載の本発明によれば、U字型
介在を用いることにより絶縁電線の外径と略同一形状の
空隙に絶縁電線を収容配置して保持することができるの
で、断面と平行方向に絶縁電線が移動することを防止す
ることができる。この結果、隣接する絶縁電線同士の距
離が変化することがなくなるので、通信ケーブルが有す
るクロストーク特性の劣化を防止することができる。ま
た、絶縁電線毎に押し出し線速が異なっていてもU字型
の溝内部で張力が元に戻ることができるので、単位長当
たりの絶縁電線の長さがほぼ一定に保つことができ、規
格割れの起こる頻度を低減させることができる。
According to the first aspect of the present invention, the insulated wire can be accommodated, arranged and held in a gap having substantially the same shape as the outer diameter of the insulated wire by using the U-shaped interposition. It is possible to prevent the insulated wire from moving in the direction parallel to the cross section. As a result, the distance between adjacent insulated wires does not change, so that the crosstalk characteristic of the communication cable can be prevented from deteriorating. In addition, even if the extrusion wire speed is different for each insulated wire, the tension can be restored inside the U-shaped groove, so that the length of the insulated wire per unit length can be kept almost constant. The frequency of occurrence of cracks can be reduced.

【0065】請求項2記載の本発明によれば、U字型介
在を用いることにより対撚線の外形と略同一形状の空隙
に対撚線を収容配置して保持することができるので、断
面と平行方向に対撚線が移動することを防止することが
できる。この結果、隣接する対撚線同士の距離が変化す
ることがなくなるので、通信ケーブルが有するクロスト
ーク特性の劣化を防止することができる。
According to the second aspect of the present invention, by using the U-shaped interposition, the twisted pair wire can be accommodated, arranged and held in a space having substantially the same shape as the outer shape of the twisted pair wire, so that the cross section can be maintained. The movement of the twisted pair wire in the direction parallel to the direction can be prevented. As a result, the distance between adjacent twisted pair wires does not change, so that deterioration of the crosstalk characteristic of the communication cable can be prevented.

【0066】請求項3記載の本発明によれば、U字型介
在は、外被の内側の曲率と略同一曲率で外被に外接する
扇形隔壁を有することで、断面と平行方向に絶縁電線が
移動することを防止することができる。
According to the third aspect of the present invention, the U-shaped interposition has a fan-shaped partition wall circumscribing the outer casing at substantially the same curvature as the inner curvature of the outer casing, so that the insulated electric wire is parallel to the cross section. Can be prevented from moving.

【0067】請求項4記載の本発明によれば、扇型隔壁
は、絶縁電線の外周の曲率と略同一曲率で絶縁電線に内
接する内接面を有することで、断面と平行方向に絶縁電
線が移動することを防止することができる。
According to the fourth aspect of the present invention, the fan-shaped partition wall has an inscribed surface inscribed in the insulated wire at substantially the same curvature as the curvature of the outer periphery of the insulated wire, so that the insulated wire is parallel to the cross section. Can be prevented from moving.

【0068】請求項5記載の本発明によれば、扇型隔壁
は、対撚線の外周の曲率と略同一曲率で対撚線に内接す
る内接面を有することで、断面と平行方向に対撚線が移
動することを防止することができる。
According to the fifth aspect of the present invention, the fan-shaped partition wall has an inscribed surface inscribed in the twisted pair wire at substantially the same curvature as the outer periphery of the twisted pair wire, so that the fan-shaped partition wall is parallel to the cross section. The movement of the twisted pair wire can be prevented.

【0069】請求項6記載の本発明によれば、発泡性材
質をポリエチレン又はテフロンとすることで、合成誘導
率を小さくすることができるので、電気特性を向上させ
ることができる。
According to the sixth aspect of the present invention, by using polyethylene or Teflon as the foamable material, the synthetic induction ratio can be reduced, so that the electrical characteristics can be improved.

【0070】請求項7記載の本発明によれば、発泡介在
の発泡率を、30〜70%とすることで、合成誘導率を
小さくし電気特性を向上させると共に、ケーブルの可と
う性を向上させることができる。更に、合成誘電率が小
さくなることから絶縁電線の撚込みピッチを長めに取る
ことができるので、撚込み時の製造線速を上げることが
可能となり製造コストを低減させることができる。
According to the seventh aspect of the present invention, by setting the foaming ratio of the foamed intermediate to 30 to 70%, the synthetic induction ratio is reduced, the electric characteristics are improved, and the flexibility of the cable is improved. Can be done. Furthermore, since the synthetic dielectric constant is reduced, the twisting pitch of the insulated wire can be made longer, so that the production linear speed at the time of twisting can be increased, and the production cost can be reduced.

【0071】請求項8記載の本発明によれば、U字型介
在は、扇型隔壁同士の間に絶縁電線又は対撚線を収容配
置する空隙を4つ有することで、4本の絶縁電線又は対
撚線を収容配置することができる。
According to the present invention, the U-shaped interposition has four gaps for accommodating and disposing the insulated wire or the twisted pair wire between the fan-shaped partition walls, thereby providing four insulated wires. Or it can accommodate and arrange a twisted pair wire.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の第1の実施の形態に係る通信ケーブル
1の構成を示す断面図である。
FIG. 1 is a sectional view showing a configuration of a communication cable 1 according to a first embodiment of the present invention.

【図2】U字型発泡介在11の構成を示す断面図であ
る。
FIG. 2 is a cross-sectional view showing a configuration of a U-shaped foamed interposition 11;

【図3】本発明の第1の実施の形態に係る通信ケーブル
1のケーブル諸元を表す表である。
FIG. 3 is a table showing cable specifications of the communication cable 1 according to the first embodiment of the present invention.

【図4】U字型発泡介在11,31の発泡率と合成誘電
率の関係を表す表である。
FIG. 4 is a table showing a relationship between a foaming ratio of U-shaped foamed intervening layers 11 and 31 and a composite dielectric constant.

【図5】本発明の第2の実施の形態に係る通信ケーブル
3の構成を示す断面図である。
FIG. 5 is a sectional view showing a configuration of a communication cable 3 according to a second embodiment of the present invention.

【図6】本発明の第2の実施の形態に係る通信ケーブル
3のケーブル諸元を表す表である。
FIG. 6 is a table showing cable specifications of a communication cable 3 according to a second embodiment of the present invention.

【図7】従来の丸型介在101と絶縁電線103とから
なる通信ケーブルの断面を示す図(a)と、従来の丸型
介在101と対撚線102とからなる通信ケーブルの断
面を示す図(b)である。
7A is a diagram illustrating a cross section of a communication cable including a conventional round interposition 101 and an insulated wire 103, and FIG. 7B is a diagram illustrating a cross section of a communication cable including a conventional round interposition 101 and a twisted pair wire 102. (B).

【符号の説明】[Explanation of symbols]

1,3 通信ケーブル 11,31 U字型発泡介在 13 絶縁電線 15 中心導体 17 絶縁体 19 金属テープ(アルミテープ) 21 外被 23,35 溝 25 外接面 27,37 内接面 29 扇型隔壁 33 対撚線 1,3 Communication cable 11,31 U-shaped foaming interposition 13 Insulated wires 15 center conductor 17 Insulator 19 Metal tape (aluminum tape) 21 Jacket 23, 35 grooves 25 circumscribed surface 27, 37 inscribed surface 29 fan-type partition 33 twisted pair

───────────────────────────────────────────────────── フロントページの続き (72)発明者 大橋 圭二 千葉県佐倉市六崎1440 株式会社フジクラ 佐倉事業所内 Fターム(参考) 5G319 DA01 DB00 DC05    ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Keiji Ohashi             Fujikura Co., Ltd.             Sakura Office F term (reference) 5G319 DA01 DB00 DC05

Claims (8)

【特許請求の範囲】[Claims] 【請求項1】 中心導体に絶縁体を被覆して形成された
絶縁電線と、 前記絶縁電線の断面と略同一のU字形状の空隙に前記絶
縁電線を収容配置するU字型介在と、 前記U字型介在の外周を被覆する金属テープと、 前記金属テープの外周に絶縁体を被覆する外被とからな
ることを特徴とする通信ケーブル。
1. An insulated wire formed by covering a central conductor with an insulator; a U-shaped interposition for accommodating and arranging the insulated wire in a U-shaped space substantially the same as a cross section of the insulated wire; A communication cable comprising: a metal tape covering an outer periphery of a U-shaped interposition; and a jacket covering an outer periphery of the metal tape with an insulator.
【請求項2】 中心導体に絶縁体を被覆して形成された
絶縁電線と、 前記絶縁電線を2本撚り合わせて形成された対撚線と、 前記対撚線の撚り方向に形成される軌跡と略同一のU字
形状の空隙に前記対撚線を収容配置するU字型介在と、 前記U字型介在の外周を被覆する金属テープと、 前記金属テープの外周に絶縁体を被覆する外被とからな
ることを特徴とする通信ケーブル。
2. An insulated wire formed by covering a central conductor with an insulator; a pair of twisted wires formed by twisting two of the insulated wires; and a locus formed in a twisting direction of the twisted pair of wires. A U-shaped interposer for accommodating and disposing the twisted pair wire in a U-shaped space substantially the same as the above, a metal tape covering the outer periphery of the U-shaped interposition, and an outer covering the outer periphery of the metal tape with an insulator. A communication cable, comprising:
【請求項3】 前記U字型介在は、 前記外被の内側の曲率と略同一曲率で外被に外接する扇
型隔壁を有することを特徴とする請求項1又は2に記載
の通信ケーブル。
3. The communication cable according to claim 1, wherein the U-shaped interposition has a fan-shaped partition wall circumscribing the outer jacket with substantially the same curvature as the inner curvature of the outer jacket.
【請求項4】 前記扇型隔壁は、 前記絶縁電線の外側の曲率と略同一曲率で絶縁電線に内
接する内接面を有することを特徴とする請求項3記載の
通信ケーブル。
4. The communication cable according to claim 3, wherein the fan-shaped partition wall has an inscribed surface inscribed in the insulated wire at substantially the same curvature as the outer curvature of the insulated wire.
【請求項5】 前記扇型隔壁は、 前記対撚線の外側の曲率と略同一曲率で対撚線に内接す
る内接面を有することを特徴とする請求項3記載の通信
ケーブル。
5. The communication cable according to claim 3, wherein the fan-shaped partition wall has an inscribed surface inscribed in the twisted pair with substantially the same curvature as the outside curvature of the twisted pair.
【請求項6】 前記U字型介在は、 ポリエチレン又はテフロン(登録商標)を発泡させてな
る発泡性材料からなることを特徴とする請求項1乃至5
のいずれか1つに記載の通信ケーブル。
6. The U-shaped interposition comprises a foamable material obtained by foaming polyethylene or Teflon (registered trademark).
The communication cable according to any one of the above.
【請求項7】 前記U字型介在の発泡率は、 30〜70%であることを特徴とする請求項1乃至6の
いずれか1つに記載の通信ケーブル。
7. The communication cable according to claim 1, wherein a foaming rate of the U-shaped interposition is 30 to 70%.
【請求項8】 前記U字型介在は、 前記U字形状の空隙を4つ有することを特徴とする請求
項1又は2に記載の通信ケーブル。
8. The communication cable according to claim 1, wherein the U-shaped interposition has four U-shaped gaps.
JP2002151141A 2002-05-24 2002-05-24 Communication cable Pending JP2003346567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002151141A JP2003346567A (en) 2002-05-24 2002-05-24 Communication cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002151141A JP2003346567A (en) 2002-05-24 2002-05-24 Communication cable

Publications (1)

Publication Number Publication Date
JP2003346567A true JP2003346567A (en) 2003-12-05

Family

ID=29768817

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002151141A Pending JP2003346567A (en) 2002-05-24 2002-05-24 Communication cable

Country Status (1)

Country Link
JP (1) JP2003346567A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008097872A (en) * 2006-10-06 2008-04-24 Tonichi Kyosan Cable Ltd Unshielded twisted pair cable
JP2009277592A (en) * 2008-05-16 2009-11-26 Tonichi Kyosan Cable Ltd Cable unit for local area network
JP2020087681A (en) * 2018-11-22 2020-06-04 日立金属株式会社 Cable for movable part

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008097872A (en) * 2006-10-06 2008-04-24 Tonichi Kyosan Cable Ltd Unshielded twisted pair cable
JP2009277592A (en) * 2008-05-16 2009-11-26 Tonichi Kyosan Cable Ltd Cable unit for local area network
JP4665998B2 (en) * 2008-05-16 2011-04-06 東日京三電線株式会社 LAN cable unit
JP2020087681A (en) * 2018-11-22 2020-06-04 日立金属株式会社 Cable for movable part

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