JPH08249944A - Twisted pair cable - Google Patents
Twisted pair cableInfo
- Publication number
- JPH08249944A JPH08249944A JP5596595A JP5596595A JPH08249944A JP H08249944 A JPH08249944 A JP H08249944A JP 5596595 A JP5596595 A JP 5596595A JP 5596595 A JP5596595 A JP 5596595A JP H08249944 A JPH08249944 A JP H08249944A
- Authority
- JP
- Japan
- Prior art keywords
- polyethylene
- core wires
- pair
- twisted
- cable
- 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
Links
Landscapes
- Processes Specially Adapted For Manufacturing Cables (AREA)
- Communication Cables (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば高速データ伝送
用通信ケーブルとして利用されるもので、特に通信ケー
ブルの伝送特性が安定したツイストペアケーブルに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, as a communication cable for high-speed data transmission, and more particularly to a twisted pair cable having stable transmission characteristics of the communication cable.
【０００２】[0002]
【従来の技術】近年高速データ伝送（例：１００Mbps）
に、施設が容易で経済的な非シールドツイストペアケー
ブルが用いられて来た。2. Description of the Related Art High-speed data transmission in recent years (eg 100 Mbps)
Moreover, unshielded twisted pair cables have been used because they are easy to install and economical.
【０００３】この様なケーブルは導体を着色されたポリ
エチレンで絶縁被覆し、これを心線とし、更に着色の異
なるこの絶縁被覆した２本の心線を撚合わせ対（撚線）
を構成する。この対を複数本（複数対）設けて、更にこ
の複数の対を撚合わせ、その外側を塩化ビニル樹脂など
で被覆し、ケーブルの形態に構成し使用される。対を構
成する時の撚ピッチは対間の漏話特性を改善する為、撚
ピッチを異ならせることが一般的に知られている。In such a cable, a conductor is insulation-coated with colored polyethylene, which is used as a core wire, and two insulation-coated core wires different in color are twisted to form a twisted pair (stranded wire).
Is configured. A plurality of pairs (a plurality of pairs) are provided, the plurality of pairs are further twisted, and the outside thereof is covered with a vinyl chloride resin or the like to be used in the form of a cable. It is generally known that the twist pitch when forming a pair is different in order to improve the crosstalk characteristic between the pair.
【０００４】対を撚合わせた後、撚合わせが崩れないよ
う、和紙又は樹脂製テープで押さえ巻を施した後、柔軟
な塩化ビニル樹脂などで外被を構成することも一般的に
知られている。It is also generally known that, after twisting the pair, it is wound with Japanese paper or resin tape so that the twist is not broken, and then the outer cover is made of flexible vinyl chloride resin or the like. There is.
【０００５】[0005]
【発明が解決しようとする課題】高速データ伝送を前述
のようなツイストペアケーブルを伝送路として行う場合
は、次のような問題点を有する。When the high-speed data transmission is performed by using the above twisted pair cable as the transmission line, there are the following problems.
【０００６】伝送路の特性インピーダンスは伝送路の長
手方向に渡って変化なく一定でないと、信号が反射した
り、減衰量が大きくなったりする為、ビットエラーを生
ずる。If the characteristic impedance of the transmission line does not change and is constant over the longitudinal direction of the transmission line, a signal is reflected and the amount of attenuation increases, resulting in a bit error.
【０００７】２本の心線を撚合わせた伝送路の特性イン
ピーダンスは、導体外径，導体を被覆する絶縁体の比誘
電率及び導体間の距離によって決定される。The characteristic impedance of a transmission line formed by twisting two core wires is determined by the outer diameter of the conductor, the relative permittivity of the insulator covering the conductor, and the distance between the conductors.
【０００８】従来の２本の心線を撚合わせ、対を形成
し、この対を更に複数対撚合わせた構造のツイストペア
ケーブルは、ケーブルを曲げたりした場合、導体の距離
が変化し、特性インピーダンスがケーブルの長手方向に
渡り不連続的に変化する問題が残る。また、ツイストペ
アケーブル端末をローゼットやコネクタに取付ける工事
を行う場合、外被及び押さえ巻テープなどを除去する
が、その場合、対の撚りが必要な長さ以上に渡って崩
れ、前記と同じく特性インピーダンスの変化が生じ、対
間の漏話減衰量も大きくなる。A conventional twisted pair cable having a structure in which two cores are twisted together to form a pair, and a plurality of pairs are twisted, the conductor distance changes when the cable is bent, and the characteristic impedance changes. Remains a discontinuous change over the length of the cable. Also, when installing the twisted pair cable end to a rosette or connector, remove the outer cover and the press winding tape, but in that case, the twist of the pair collapses for more than the required length, and the characteristic impedance is the same as above. Change occurs, and the crosstalk attenuation amount between the pair also increases.
【０００９】本発明は、このような問題点を解決したツ
イストペアケーブルを提供するものである。The present invention provides a twisted pair cable that solves these problems.
【００１０】[0010]
【課題を解決するための手段】添付図面を参照して本発
明の要旨を説明する。The gist of the present invention will be described with reference to the accompanying drawings.
【００１１】導体１をポリエチレンで絶縁被覆した心線
ａ，ｂ２本を撚合わせ１つの対Ｔを形成し、この対Ｔを
複数対形成し、これらの対Ｔを更に撚合わせ、その外側
より外被３を被覆したツイストペアケーブルであって、
この各対Ｔの２本の心線ａ，ｂのポリエチレン絶縁被覆
２同志を連続的に熱融着したことを特徴とするツイスト
ペアケーブルに係るものである。Two cores a and b in which the conductor 1 is insulation-coated with polyethylene are twisted to form one pair T, a plurality of pairs T are formed, and these pairs T are further twisted, and the outside of the outside thereof. A twisted pair cable covering the target 3
The present invention relates to a twisted pair cable in which the two polyethylene insulation coatings 2 of the two core wires a and b of each pair T are continuously heat-sealed.
【００１２】前記各心線ａ，ｂ２本を撚合わせた後、熱
風にて各心線ａ，ｂ間を連続的に熱融着したことを特徴
とする請求項１記載のツイストペアケーブルに係るもの
である。The twisted pair cable according to claim 1, wherein after twisting the two core wires a and b, the core wires a and b are continuously heat-sealed with hot air. Is.
【００１３】[0013]
【作用】導体１をポリエチレンで絶縁被覆した心線２本
ａ，ｂは、撚り合わされて対Ｔに構成されているが、こ
の対Ｔは２本の心線ａ，ｂのポリエチレン絶縁被覆２同
志を連続的に熱融着されているため、対Ｔの撚りが崩れ
にくく、導体１同志の距離が一定に保持される。The two cores a and b in which the conductor 1 is insulation-coated with polyethylene are twisted together to form a pair T. The pair T is a polyethylene insulation coating 2 of the two cores a and b. , The twist of the pair T is not easily broken, and the distance between the conductors 1 is kept constant.
【００１４】[0014]
【実施例】従来のツイストペアケーブルの問題を解決す
る方法としては、２本の心線ａ，ｂが一体となり、導体
１間の距離が一定で、ケーブルの曲げや、外圧に対し、
変化しなければ良い。EXAMPLE As a method of solving the problem of the conventional twisted pair cable, two core wires a and b are integrated, the distance between the conductors 1 is constant, and the cable is bent and external pressure is applied.
Good if it doesn't change.
【００１５】２本の心線ａ，ｂを一体とする方法として
は、２本の導体を同時に押出絶縁被覆する方法がある
が、この方法では絶縁体（絶縁被覆）の色が一色となり
異なる着色とはできない為、心線ａ，ｂの識別ができな
い。As a method of integrating the two core wires a and b, there is a method of simultaneously extrusion-insulating and covering two conductors. In this method, the color of the insulator (insulating coating) becomes one color and different coloring is achieved. Therefore, the cores a and b cannot be identified.
【００１６】また、この対Ｔに撚りを加えた場合は対Ｔ
全体に応力が残る。ケーブルに柔軟性を持たせる為、単
線とせず細経線の導体を撚合わせた撚線の場合には、対
Ｔに応力が残ると導体自体の撚ピッチが崩れ、減衰量特
性などが悪くなる。When twist is added to the pair T, the pair T
The stress remains on the whole. In order to give the cable flexibility, in the case of a twisted wire in which conductors of thin meridians are twisted together instead of being a single wire, if stress remains in the pair T, the twist pitch of the conductor itself collapses, and the attenuation characteristic deteriorates.
【００１７】別の方法としては、２本の心線を対撚する
時点で絶縁被覆２上に接着剤を塗布し、接着する方法が
ある。As another method, there is a method in which an adhesive is applied to the insulating coating 2 at the time when the two core wires are twisted in a pair, and the wires are bonded together.
【００１８】絶縁被覆２が塩化ビニル樹脂やゴムの場合
は作業は厄介であるが接着によって一体化することがで
きるが、比誘導率が小さく伝送特性に秀れたポリエチレ
ンなどオレフィン系の場合は接着が困難である。When the insulating coating 2 is made of vinyl chloride resin or rubber, the work is troublesome but it can be integrated by adhesion, but when it is made of olefin such as polyethylene which has a small specific induction and excellent transmission characteristics, it is bonded. Is difficult.
【００１９】即ち、塩化ビニル樹脂やゴムは、比誘電率
及び誘電体力率の値が、ポリエチレンの場合と比較して
大きく、絶縁被覆外径の寸法を同一とした場合、対撚さ
れた心線ａ，ｂ間の静電容量が大きくなり、その結果、
伝送可能な距離がポリエチレン絶縁被覆の場合より短く
なる。That is, the vinyl chloride resin and rubber have larger relative permittivity and dielectric power factor than those of polyethylene, and when the outer diameter of the insulation coating is the same, the twisted core wire is used. The capacitance between a and b increases, and as a result,
The transmission distance is shorter than that of the polyethylene insulation coating.
【００２０】また、ポリエチレンとポリエチレンを接着
剤で接着する場合には、一般にコロナ放電や化学処理に
より、ポリエチレンの表面を荒した後、エポキシ系接着
剤にて接着するが、エポキシ系接着剤の比誘導率は、１
ＫＨZで約２.９４であり、ポリエチレンの比誘導率２.
３と比較して大きく、この接着剤がポリエチレン絶縁被
覆された心線ａ，ｂの表面を覆い、心線ａ，ｂ間に挟ま
れる形になるため、ケーブル伝送特性は、ポリエチレン
被覆心線を熱融着した本発明の場合より悪くなる。以上
はポリエチレンの形状が板状の場合であるが、ポリエチ
レンの形状が丸い場合には、前記と同じ加工を施しても
接着剤による接着は困難であり、実用化しにくい。When polyethylene and polyethylene are bonded with an adhesive, the surface of polyethylene is generally roughened by corona discharge or chemical treatment and then bonded with an epoxy adhesive. Induction rate is 1
KH Z is about 2.94, and the specific induction of polyethylene is 2.
3, the adhesive covers the surface of the core wires a and b covered with polyethylene insulation and is sandwiched between the core wires a and b. Therefore, the cable transmission characteristic is that the polyethylene coated core wire is It is worse than in the case of the present invention in which heat fusion is performed. The above is the case where the polyethylene has a plate shape. However, when the polyethylene has a round shape, it is difficult to bond with an adhesive even if the same processing as above is applied, and it is difficult to put it into practical use.
【００２１】そこで、本発明に係るツイストペアケーブ
ルは、導体１をポリエチレン絶縁被覆した心線ａ，ｂを
２本撚合わせ、熱風にて心線ａ，ｂを融着した構成と
し、伝送特性に秀れたポリエチレンで絶縁被覆した２本
の心線ａ，ｂを連続的に一体化でき、しかも簡易な手法
で確実にポリエチレンで絶縁被覆した心線同志でも一体
化でき、量産性に秀れたケーブルとしたものである。Therefore, the twisted pair cable according to the present invention has a structure in which two conductors a and b in which the conductor 1 is polyethylene-insulated are twisted together, and the conductors a and b are fused by hot air, which is excellent in transmission characteristics. A cable with excellent mass productivity that can continuously integrate two core wires a and b that are insulation-coated with polyethylene, and can also reliably integrate core wires that are insulation-coated with polyethylene by a simple method. It is what
【００２２】即ち、接着剤を用いず熱融着によるため、
前記コロナ放電装置や化学処理装置は必要なく、また、
高価な接着剤も必要なく簡便で安価な熱風を発生させる
炉を対撚された心線ａ，ｂを通過させるだけで、連続的
に融着でき、極めて経済的に加工できる。That is, since heat fusion is performed without using an adhesive,
There is no need for the corona discharge device or chemical treatment device, and
By simply passing the pair of twisted cores a and b through a furnace for generating hot air that is simple and inexpensive without requiring an expensive adhesive, continuous fusion can be performed and processing can be performed extremely economically.
【００２３】例えば、１９０℃の熱風では１分間以下で
熱融着できる。For example, with hot air at 190 ° C., heat fusion can be performed in 1 minute or less.
【００２４】本発明に係る一実施例を示すツイストペア
ケーブルを図１に示す。FIG. 1 shows a twisted pair cable showing an embodiment according to the present invention.
【００２５】導体１は裸銅線または錫メッキ線を用いて
いる。この導体１をポリエチレンで絶縁被覆して心線
ａ，ｂを構成するが、このポリエチレン絶縁被覆２は、
心線ａ，ｂ毎に異なった色で製造されるかまたは、異な
った色の塗料でマーク付けされる。The conductor 1 is a bare copper wire or a tin-plated wire. The conductor 1 is insulation-coated with polyethylene to form the core wires a and b. The polyethylene insulation coating 2 is
Each core a, b is manufactured in a different color or marked with a different color paint.
【００２６】更にこの絶縁被覆２の色の異なる心線ａ，
ｂまたはマーク色の異なる心線ａ，ｂ２本を撚合わして
対Ｔを形成する。Further, the core wires a of the insulating coating 2 having different colors,
Two cores a and b having different b or mark colors are twisted to form a pair T.
【００２７】本実施例は対Ｔが４本の場合を図示してい
るが、各対Ｔの撚ピッチは漏話改善の為、夫々異なる撚
ピッチで撚合わす。In the present embodiment, the case where there are four pairs T is illustrated, but the twist pitch of each pair T is twisted at different twist pitches in order to improve crosstalk.
【００２８】各対Ｔは熱コントロールされた熱風炉の中
を一定時間通されポリエチレンの絶縁被覆２同志が連続
的に熱融着される。Each pair T is passed through a heat-controlled hot blast stove for a certain period of time, and the insulation coatings 2 of polyethylene are continuously heat-sealed.
【００２９】融着された後の特性インピーダンスが設定
値となるように絶縁被覆された心線ａ，ｂの外径と、熱
風炉の温度及び加熱時間が決められる。The outer diameters of the core wires a and b, which are insulation-coated so that the characteristic impedance after fusion is a set value, the temperature and the heating time of the hot stove are determined.
【００３０】２本の心線ａ，ｂ間が撚り合わされ熱融着
された各対Ｔを更に複数本（実施例では４対）撚合わ
し、その外側を実施例では押さえ材４（テープや糸材）
で覆い、更に柔軟な塩化ビニル樹脂３で円形に被覆し、
ケーブルに構成している。A plurality of pairs (4 pairs in the embodiment) of each of the pairs T in which the two core wires a and b are twisted and heat-sealed are twisted together, and the outside thereof is pressed in the embodiment by a pressing member 4 (tape or thread). Material)
Then, cover with a soft vinyl chloride resin 3 in a circle,
Configured into a cable.
【００３１】[0031]
【発明の効果】本発明は、上述のように構成したから、
常に撚り合わされた各心線の導体の距離が一定に保持さ
れるため、伝送特性が良好となり、また伝送特性に秀れ
たポリエチレンで絶縁被覆した２本の心線を連続的に一
体化した構成で、しかも簡易な手法で確実にポリエチレ
ンで絶縁被覆した心線同志でも一体化でき、量産性に秀
れたツイストペアケーブルとなる。Since the present invention is constructed as described above,
Since the distance between the conductors of the twisted cores is always kept constant, the transmission characteristics are good, and the two insulation-insulated cores with excellent transmission characteristics are continuously integrated. In addition, a twisted pair cable with excellent mass productivity can be integrated by using a simple method to reliably integrate core wires that are insulation-coated with polyethylene.
【００３２】しかも、熱融着により一体化するため、接
着剤による方法に比べて簡単であり、コストもかから
ず、ポリエチレン被覆構造であるから伝送特性を劣化さ
せずに一体化が容易にでき、また、熱風によって行えば
非常に短時間で簡単に熱融着でき、極めて実用性に秀れ
たツイストペアケーブルとなる。In addition, since it is integrated by heat fusion, it is simpler and less costly than the method using an adhesive, and since it is a polyethylene-coated structure, it can be easily integrated without deteriorating the transmission characteristics. Also, if it is carried out with hot air, it can be easily heat-sealed in a very short time, and it becomes a twisted pair cable which is extremely practical.
【図１】本実施例の一端に切り欠き、各対の撚りをほど
いた状態の説明正面図である。FIG. 1 is an explanatory front view showing a state in which a twist is formed on each pair by cutting out one end of the present embodiment.
【図２】本実施例の心線ａ，ｂを撚り合わせて融着した
対の断面図である。FIG. 2 is a cross-sectional view of a pair in which core wires a and b of the present embodiment are twisted and fused.
１ 導体 ２ ポリエチレン絶縁被覆 ３ 外被 1 conductor 2 polyethylene insulation coating 3 jacket
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成８年３月７日[Submission date] March 7, 1996
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Correction target item name] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【書類名】 明細書[Document name] Statement
【発明の名称】 ツイストペアケーブル[Title of Invention] Twisted pair cable
【特許請求の範囲】[Claims]
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は、例えば高速データ伝送
用通信ケーブルとして利用されるもので、特に通信ケー
ブルの伝送特性が安定したツイストペアケーブルに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, as a communication cable for high-speed data transmission, and more particularly to a twisted pair cable having stable transmission characteristics of the communication cable.
【０００２】[0002]
【従来の技術】近年高速データ伝送（例：１００Mbps）
に、布設が容易で経済的な非シールドツイストペアケー
ブルや、シールドツイストペアケーブルが用いられて来
た。2. Description of the Related Art High-speed data transmission in recent years (eg 100 Mbps)
In addition, unshielded twisted pair cables and shielded twisted pair cables that have been used easily and economically have been used.
【０００３】この様なケーブルは導体を着色されたポリ
エチレンで絶縁被覆し、これを心線とし、更に着色の異
なるこの絶縁被覆した２本の心線を撚合わせ対（撚線）
を構成する。この対を複数本（複数対）設けて、更にこ
の複数の対を撚合わせ、その外側を塩化ビニル樹脂など
で被覆し、ケーブルの形態に構成し使用される。対を構
成する時の撚ピッチは対間の漏話特性を改善する為、撚
ピッチを異ならせることが一般的に知られている。In such a cable, a conductor is insulation-coated with colored polyethylene, which is used as a core wire, and two insulation-coated core wires different in color are twisted to form a twisted pair (stranded wire).
Is configured. A plurality of pairs (a plurality of pairs) are provided, the plurality of pairs are further twisted, and the outside thereof is covered with a vinyl chloride resin or the like to be used in the form of a cable. It is generally known that the twist pitch when forming a pair is different in order to improve the crosstalk characteristic between the pair.
【０００４】対を撚合わせた後、撚合わせが崩れないよ
う、和紙又は樹脂製テープで押さえ巻を施した後、柔軟
な塩化ビニル樹脂などで外被を構成することも一般的に
知られている。It is also generally known that, after twisting the pair, it is wound with Japanese paper or resin tape so that the twist is not broken, and then the outer cover is made of flexible vinyl chloride resin or the like. There is.
【０００５】[0005]
【発明が解決しようとする課題】高速データ伝送を前述
のようなツイストペアケーブルを伝送路として行う場合
は、次のような問題点を有する。When the high-speed data transmission is performed by using the above twisted pair cable as the transmission line, there are the following problems.
【０００６】伝送路の特性インピーダンスは伝送路の長
手方向に渡って変化なく一定でないと、信号が反射した
り、減衰量が大きくなったりする為、ビットエラーを生
ずる。If the characteristic impedance of the transmission line does not change and is constant over the longitudinal direction of the transmission line, a signal is reflected and the amount of attenuation increases, resulting in a bit error.
【０００７】２本の心線を撚合わせた伝送路の特性イン
ピーダンスは、導体外径，導体を被覆する絶縁体の比誘
電率及び導体間の距離によって決定される。The characteristic impedance of a transmission line formed by twisting two core wires is determined by the outer diameter of the conductor, the relative permittivity of the insulator covering the conductor, and the distance between the conductors.
【０００８】従来の２本の心線を撚合わせ、対を形成
し、この対を更に複数対撚合わせた構造のツイストペア
ケーブルは、ケーブルを曲げたりした場合、導体の距離
が変化し、特性インピーダンスがケーブルの長手方向に
渡り不連続的に変化する問題が残る。また、ツイストペ
アケーブル端末をローゼットやコネクタに取付ける工事
を行う場合、外被及び押さえ巻テープなどを除去する
が、その場合、対の撚りが必要以上の長さに渡って崩れ
る場合があり、前記と同じく特性インピーダンスの変化
が生じ、対間の漏話減衰量も大きくなる。A conventional twisted pair cable having a structure in which two cores are twisted together to form a pair, and a plurality of pairs are twisted, the conductor distance changes when the cable is bent, and the characteristic impedance changes. Remains a discontinuous change over the length of the cable. In addition, when performing work to attach the twisted pair cable end to a rosette or connector, remove the outer cover and the press winding tape, but in that case, the twist of the pair may collapse for more than necessary length. Similarly, the characteristic impedance changes, and the crosstalk attenuation amount between the pair also increases.
【０００９】本発明は、このような問題点を解決したツ
イストペアケーブルを提供するものである。The present invention provides a twisted pair cable that solves these problems.
【００１０】[0010]
【課題を解決するための手段】添付図面を参照して本発
明の要旨を説明する。The gist of the present invention will be described with reference to the accompanying drawings.
【００１１】導体１をポリエチレンで絶縁被覆した心線
ａ，ｂ２本を撚合わせ１つの対Ｔを形成し、この対Ｔを
複数対形成し、これらの対Ｔを更に撚合わせ、その外側
より外被３を被覆したツイストペアケーブルであって、
この各対Ｔの２本の心線ａ，ｂのポリエチレン絶縁被覆
２同志を連続的に熱融着したことを特徴とするツイスト
ペアケーブルに係るものである。Two cores a and b in which the conductor 1 is insulation-coated with polyethylene are twisted to form one pair T, a plurality of pairs T are formed, and these pairs T are further twisted, and the outside of the outside thereof. A twisted pair cable covering the target 3
The present invention relates to a twisted pair cable in which the two polyethylene insulation coatings 2 of the two core wires a and b of each pair T are continuously heat-sealed.
【００１２】前記各心線ａ，ｂ２本を撚合わせた後、熱
風にて各心線ａ，ｂ間を連続的に熱融着したことを特徴
とする請求項１記載のツイストペアケーブルに係るもの
である。The twisted pair cable according to claim 1, wherein after twisting the two core wires a and b, the core wires a and b are continuously heat-sealed with hot air. Is.
【００１３】[0013]
【作用】導体１をポリエチレンで絶縁被覆した心線２本
ａ，ｂは、撚り合わされて対Ｔに構成されているが、こ
の対Ｔは２本の心線ａ，ｂのポリエチレン絶縁被覆２同
志を連続的に熱融着されているため、対Ｔの撚りが崩れ
にくく、導体１同志の距離が一定に保持される。The two cores a and b in which the conductor 1 is insulation-coated with polyethylene are twisted together to form a pair T. The pair T is a polyethylene insulation coating 2 of the two cores a and b. , The twist of the pair T is not easily broken, and the distance between the conductors 1 is kept constant.
【００１４】[0014]
【実施例】従来のツイストペアケーブルの問題を解決す
る方法としては、２本の心線ａ，ｂが一体となり、導体
１間の距離が一定で、ケーブルの曲げや、外圧に対し、
変化しなければ良い。EXAMPLE As a method of solving the problem of the conventional twisted pair cable, two core wires a and b are integrated, the distance between the conductors 1 is constant, and the cable is bent and external pressure is applied.
Good if it doesn't change.
【００１５】２本の心線ａ，ｂを一体とする方法として
は、２本の導体を同時に押出絶縁被覆する方法がある
が、この方法では絶縁体（絶縁被覆）の色が一色となり
異なる着色とはできない為、心線ａ，ｂの識別ができな
い。As a method of integrating the two core wires a and b, there is a method of simultaneously extrusion-insulating and covering two conductors. In this method, the color of the insulator (insulating coating) becomes one color and different coloring is achieved. Therefore, the cores a and b cannot be identified.
【００１６】また、この対Ｔに撚りを加えた場合は対Ｔ
全体に応力が残る。ケーブルに柔軟性を持たせる為、単
線とせず細経線の導体を撚合わせた撚線の場合には、対
Ｔに応力が残ると導体自体の撚ピッチが崩れ、減衰量特
性などが悪くなる。When twist is added to the pair T, the pair T
The stress remains on the whole. In order to give the cable flexibility, in the case of a twisted wire in which conductors of thin meridians are twisted together instead of being a single wire, if stress remains in the pair T, the twist pitch of the conductor itself collapses, and the attenuation characteristic deteriorates.
【００１７】別の方法としては、２本の心線を対撚する
時点で絶縁被覆２上に接着剤を塗布し、接着する方法が
ある。As another method, there is a method in which an adhesive is applied to the insulating coating 2 at the time when the two core wires are twisted in a pair, and the wires are bonded together.
【００１８】絶縁被覆２が塩化ビニル樹脂やゴムの場合
は作業は厄介であるが溶剤等による接着によって一体化
することができるが、比誘導率が小さく伝送特性に秀れ
たポリエチレンなどオレフィン系の場合は接着が困難で
ある。When the insulating coating 2 is made of vinyl chloride resin or rubber, the work is troublesome, but it can be integrated by adhering with a solvent or the like, but is made of olefin such as polyethylene having a small specific induction and excellent transmission characteristics. If the adhesion is difficult.
【００１９】即ち、塩化ビニル樹脂やゴムは、比誘電率
及び誘電体力率の値が、ポリエチレンの場合と比較して
大きく、絶縁被覆外径の寸法を同一とした場合、対撚さ
れた心線ａ，ｂ間の静電容量が大きくなり、その結果、
伝送可能な距離がポリエチレン絶縁被覆の場合より短く
なる。That is, the vinyl chloride resin and rubber have larger relative permittivity and dielectric power factor than those of polyethylene, and when the outer diameter of the insulation coating is the same, the twisted core wire is used. The capacitance between a and b increases, and as a result,
The transmission distance is shorter than that of the polyethylene insulation coating.
【００２０】また、ポリエチレンとポリエチレンを接着
剤で接着する場合には、一般にコロナ放電や化学処理に
より、ポリエチレンの表面を荒した後、エポキシ系接着
剤にて接着するが、エポキシ系接着剤の比誘導率は、１
ＫＨZで約２.９４であり、ポリエチレンの比誘導率２.
３と比較して大きく、この接着剤がポリエチレン絶縁被
覆された心線ａ，ｂの表面を覆い、心線ａ，ｂ間に挟ま
れる形になるため、ケーブル伝送特性は、ポリエチレン
被覆心線を熱融着した本発明の場合より悪くなる。（以
上はポリエチレンの形状が板状の場合であるが、）ポリ
エチレンの形状が丸い場合には、前記と同じ加工を施し
ても接着剤による接着は一層困難であり、実用化しにく
い。When polyethylene and polyethylene are bonded with an adhesive, the surface of polyethylene is generally roughened by corona discharge or chemical treatment and then bonded with an epoxy adhesive. Induction rate is 1
KH Z is about 2.94, and the specific induction of polyethylene is 2.
3, the adhesive covers the surface of the core wires a and b covered with polyethylene insulation and is sandwiched between the core wires a and b. Therefore, the cable transmission characteristic is that the polyethylene coated core wire is It is worse than in the case of the present invention in which heat fusion is performed. (The above is the case where the shape of polyethylene is plate-like.) When the shape of polyethylene is round, it is more difficult to bond with an adhesive even if the same processing as described above is applied, and it is difficult to put it into practical use.
【００２１】そこで、本発明に係るツイストペアケーブ
ルは、導体１をポリエチレン絶縁被覆した心線ａ，ｂを
２本撚合わせ、熱風にて心線ａ，ｂを融着した構成と
し、伝送特性に秀れたポリエチレンで絶縁被覆した２本
の心線ａ，ｂを連続的に一体化でき、しかも簡易な手法
で確実にポリエチレンで絶縁被覆した心線同志でも一体
化でき、量産性に秀れたケーブルとしたものである。Therefore, the twisted pair cable according to the present invention has a structure in which two conductors a and b in which the conductor 1 is polyethylene-insulated are twisted together, and the conductors a and b are fused by hot air, which is excellent in transmission characteristics. A cable with excellent mass productivity that can continuously integrate two core wires a and b that are insulation-coated with polyethylene, and can also reliably integrate core wires that are insulation-coated with polyethylene by a simple method. It is what
【００２２】即ち、接着剤を用いず熱融着によるため、
前記コロナ放電装置や化学処理装置は必要なく、また、
高価な接着剤も必要なく簡便で安価な熱風を発生させる
炉の中に対撚された心線ａ，ｂを通過させるだけで、連
続的に融着でき、極めて経済的に加工できる。That is, since heat fusion is performed without using an adhesive,
There is no need for the corona discharge device or chemical treatment device, and
No expensive adhesive is required, and simply by passing the twisted core wires a and b into a furnace that generates hot air at a low cost, continuous fusion can be performed and processing can be performed extremely economically.
【００２３】例えば、１９０℃の熱風では１分間以下で
熱融着できる。For example, with hot air at 190 ° C., heat fusion can be performed in 1 minute or less.
【００２４】本発明に係る一実施例を示すツイストペア
ケーブルを図１に示す。FIG. 1 shows a twisted pair cable showing an embodiment according to the present invention.
【００２５】導体１は裸銅線または錫メッキ銅線を用い
ている。この導体１をポリエチレンで絶縁被覆して心線
ａ，ｂを構成するが、このポリエチレン絶縁被覆２は、
心線ａ，ｂ毎に異なった色で製造されるかまたは、異な
った色の塗料でマーク付けされる。The conductor 1 is a bare copper wire or a tin-plated copper wire. The conductor 1 is insulation-coated with polyethylene to form the core wires a and b. The polyethylene insulation coating 2 is
Each core a, b is manufactured in a different color or marked with a different color paint.
【００２６】更にこの絶縁被覆２の色の異なる心線ａ，
ｂまたはマーク色の異なる心線ａ，ｂ２本を撚合わせて
対Ｔを形成する。Further, the core wires a of the insulating coating 2 having different colors,
Two core wires a and b having different b or mark colors are twisted together to form a pair T.
【００２７】本実施例は対Ｔが４本の場合を図示してい
るが、各対Ｔの撚ピッチは漏話改善の為、夫々異なる撚
ピッチで撚合わす。In the present embodiment, the case where there are four pairs T is illustrated, but the twist pitch of each pair T is twisted at different twist pitches in order to improve crosstalk.
【００２８】各対Ｔは熱コントロールされた熱風炉の中
を一定時間通されポリエチレンの絶縁被覆２同志が連続
的に熱融着される。Each pair T is passed through a heat-controlled hot blast stove for a certain period of time, and the insulation coatings 2 of polyethylene are continuously heat-sealed.
【００２９】融着された後の特性インピーダンスが設定
値となるように絶縁被覆された心線ａ，ｂの外径と、熱
風炉の温度及び加熱時間が決められる。The outer diameters of the core wires a and b, which are insulation-coated so that the characteristic impedance after fusion is a set value, the temperature and the heating time of the hot stove are determined.
【００３０】２本の心線ａ，ｂ間が撚り合わされ熱融着
された各対Ｔを更に複数本（実施例では４対）撚合わ
し、その外側を実施例では押さえ材４（テープや糸材）
で覆い、更に柔軟な塩化ビニル樹脂３で円形に被覆し、
ケーブルを構成している。A plurality of pairs (4 pairs in the embodiment) of each of the pairs T in which the two core wires a and b are twisted and heat-sealed are twisted together, and the outside thereof is pressed in the embodiment by a pressing member 4 (tape or thread). Material)
Then, cover with a soft vinyl chloride resin 3 in a circle,
Make up the cable.
【００３１】[0031]
【発明の効果】本発明は、上述のように構成したから、
常に撚り合わされた各心線の導体の距離が一定に保持さ
れるため、伝送特性が良好となり、また伝送特性に秀れ
たポリエチレンで絶縁被覆した２本の心線を連続的に一
体化した構成で、しかも簡易な手法で確実にポリエチレ
ンで絶縁被覆した心線同志でも一体化でき、量産性に秀
れたツイストペアケーブルとなる。Since the present invention is constructed as described above,
Since the distance between the conductors of the twisted cores is always kept constant, the transmission characteristics are good, and the two insulation-insulated cores with excellent transmission characteristics are continuously integrated. In addition, a twisted pair cable with excellent mass productivity can be integrated by using a simple method to reliably integrate core wires that are insulation-coated with polyethylene.
【００３２】しかも、熱融着により一体化するため、接
着剤による方法に比べて簡単であり、コストもかから
ず、ポリエチレン被覆構造であるから伝送特性を劣化さ
せずに一体化が容易にでき、また、熱風によって行えば
非常に短時間で簡単に熱融着でき、撚りが崩れず、特性
インピーダンスの変化が生じにくく、漏話減衰量が小さ
く抑えられる極めて実用性に秀れたツイストペアケーブ
ルとなる。In addition, since it is integrated by heat fusion, it is simpler and less costly than the method using an adhesive, and since it is a polyethylene-coated structure, it can be easily integrated without deteriorating the transmission characteristics. Also, if it is performed with hot air, it can be easily heat-sealed in a very short time, the twist is not broken, the characteristic impedance does not easily change, and the crosstalk attenuation amount is suppressed to a small value. .
【図面の簡単な説明】[Brief description of drawings]
【図１】本実施例の一端に切り欠き、各対の撚りをほど
いた状態の説明正面図である。FIG. 1 is an explanatory front view showing a state in which a twist is formed on each pair by cutting out one end of the present embodiment.
【図２】本実施例の心線ａ，ｂを撚り合わせて融着した
対の断面図である。FIG. 2 is a cross-sectional view of a pair in which core wires a and b of the present embodiment are twisted and fused.
【符号の説明】 １ 導体 ２ ポリエチレン絶縁被覆 ３ 外被[Explanation of symbols] 1 conductor 2 polyethylene insulation coating 3 jacket
Claims (2)
２本を撚合わせ１つの対を形成し、この対を複数対形成
し、これらの対を更に撚合わせ、その外側より外被を被
覆したツイストペアケーブルであって、この各対の２本
の心線のポリエチレン絶縁被覆同志を連続的に熱融着し
たことを特徴とするツイストペアケーブル。1. A conductor is insulation-coated with polyethylene, and two core wires are twisted to form one pair, a plurality of pairs are formed, and these pairs are further twisted, and a jacket is coated from the outside thereof. A twisted pair cable, characterized in that the polyethylene insulation coatings of the two core wires of each pair are continuously heat-sealed.
て各心線間を連続的に熱融着したことを特徴とする請求
項１記載のツイストペアケーブル。2. The twisted pair cable according to claim 1, wherein after twisting the two core wires, the core wires are continuously heat-sealed with hot air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5596595A JPH08249944A (en) | 1995-03-15 | 1995-03-15 | Twisted pair cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5596595A JPH08249944A (en) | 1995-03-15 | 1995-03-15 | Twisted pair cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08249944A true JPH08249944A (en) | 1996-09-27 |
Family
ID=13013798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5596595A Pending JPH08249944A (en) | 1995-03-15 | 1995-03-15 | Twisted pair cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08249944A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002103715A1 (en) * | 2001-06-14 | 2002-12-27 | Pirelli Telecom Cables & Systems Australia Pty Ltd. | Communications cable provided with a crosstalk barrier for use at high transmission frequencies |
| JP2003036739A (en) * | 2001-07-19 | 2003-02-07 | Fujikura Ltd | Communication cable |
| CN104821212A (en) * | 2015-05-11 | 2015-08-05 | 东莞市台烽电子有限公司 | Production method for anti-aging communication cable, and communication cable and concentrated twisting device based on production method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5267778A (en) * | 1975-12-04 | 1977-06-04 | Hitachi Cable Ltd | Manufacture of low impedance stranded wire |
| JPH05290645A (en) * | 1992-04-09 | 1993-11-05 | Oki Densen Kk | Aligned pair type or quad type cable |
-
1995
- 1995-03-15 JP JP5596595A patent/JPH08249944A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5267778A (en) * | 1975-12-04 | 1977-06-04 | Hitachi Cable Ltd | Manufacture of low impedance stranded wire |
| JPH05290645A (en) * | 1992-04-09 | 1993-11-05 | Oki Densen Kk | Aligned pair type or quad type cable |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002103715A1 (en) * | 2001-06-14 | 2002-12-27 | Pirelli Telecom Cables & Systems Australia Pty Ltd. | Communications cable provided with a crosstalk barrier for use at high transmission frequencies |
| JP2003036739A (en) * | 2001-07-19 | 2003-02-07 | Fujikura Ltd | Communication cable |
| CN104821212A (en) * | 2015-05-11 | 2015-08-05 | 东莞市台烽电子有限公司 | Production method for anti-aging communication cable, and communication cable and concentrated twisting device based on production method |
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