EP0763831A1 - Multi-pairs cable, shielded by pair and easy to connect - Google Patents

Multi-pairs cable, shielded by pair and easy to connect Download PDF

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Publication number
EP0763831A1
EP0763831A1 EP96401944A EP96401944A EP0763831A1 EP 0763831 A1 EP0763831 A1 EP 0763831A1 EP 96401944 A EP96401944 A EP 96401944A EP 96401944 A EP96401944 A EP 96401944A EP 0763831 A1 EP0763831 A1 EP 0763831A1
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EP
European Patent Office
Prior art keywords
pairs
rod
cable
fins
cable according
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Granted
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EP96401944A
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German (de)
French (fr)
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EP0763831B1 (en
Inventor
Daniel Prudhon
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Nexans France SAS
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Filotex SA
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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
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • 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
    • H01B11/02—Cables with twisted pairs or quads

Definitions

  • the present invention relates to cables with several pairs of individually insulated electrical conductors for transmitting high frequency and low crosstalk signals between the pairs, such as computer cables. It relates more particularly to such a multi-pair cable, shielded in pairs and easy to connect.
  • crosstalk is a fundamental parameter, which it is known to improve considerably by individually shielding the pairs of the cable.
  • the most conventionally adopted solution for shielding each pair is to helically tape a metallic or metallized ribbon around each pair, before assembling the individually shielded pairs under the same protective sheath.
  • the taping operation of each pair is a slow operation, which is necessarily carried out in recovery on each pair already formed to allow obtaining high frequency transmission characteristics.
  • a taping operation carried out during the making of the pairs is not suitable, since the taping step is that of the conductors of each pair concerned and therefore does not make it possible to guarantee a regularity of impedance compatible with high-speed transmissions.
  • GB-A-1546609 describes a computer cable with several individually shielded pairs.
  • This cable is a flat cable, the pairs of which are side by side.
  • the shielding of the pairs is carried out by two ribbons, which cover all of the pairs extending between them and are linked to each other on either side of each of the pairs.
  • Each shielding tape comprises a metal strip, for example aluminum, coated on at least one of its faces with a thermoplastic material and preferably on the other face. synthetic polyester resin. The faces coated with thermoplastic material are placed opposite, for their hot bonding and the resulting bonding of the two shielding tapes.
  • a tear line is also provided along each connection zone of the two tapes between the pairs. Such tear lines facilitate access to the conductors of the pairs for connection of the cable.
  • a disadvantage of this cable comes from its flat structure, which means that the relatively wide and flexible cable in one direction tends to twist when laid. This is particularly the case when this flat cable has four pairs, like the cables most used in computer networks, and is then very wide. You will have to untwist it during installation and it will become very vulnerable to traction.
  • Document US-A-3819 443 discloses a shielding element constituted by laminated strips of metal and plastic, which are cut, folded and assembled to each other and thus define radial branches on said element. It also discloses a cable comprising a set of conductors arranged in pairs, said shielding element and an external insulating sheath around the set of conductors. In this cable, the shielding element with radial branches internally compartments the cable. The different pairs of this cable are thus separated from each other but each of them is only partially shielded, which is not as effective as a shield provided around each pair and is not always satisfactory.
  • the object of the present invention is to produce a multi-pair cable screened in pairs and easy to connect, having a circular section and not having the drawbacks of the above-mentioned flat cable with pairs screened individually.
  • a multi-pair cable shielded in pairs and easy to connect having a circular section and comprising several pairs of conductors isolated individually and an electrical shielding around each pair, characterized in that the electrical shieldings of the different pairs are constituted by a central rod with radial fins, separating the pairs from each other and ensuring a partial shielding of each of them, and by a peripheral screen surrounding said rod and the set of pairs between said fins and completing the shielding of each of the pairs.
  • the cable illustrated in Figures 1 and 2 is of circular section. It comprises four pairs 1 to 4 of electrical conductors, the pairs of which are individually screened, and an outer protective sheath 5 surrounding all of the screened pairs.
  • the conductors of the pairs are identical. Each has a conductive core such as 6 and insulation peripheral such as 7. The two electrical conductors of each pair are directly assembled to each other by twisting.
  • the cable can of course comprise a different number of pairs, the cables with four pairs being however in practice the most used in computer networks.
  • the shielding of the individual pairs is carried out by a rod 10 with radial fins 11, ensuring the separation of the pairs and the partial shielding of each of them, and by a peripheral screen 13 surrounding the rod and all of the pairs in place and completing the shielding of each pair.
  • the rod 10 with fins 11 is in the form of a cross and defines four V-shaped cells such that 14 receiving the four pairs. It comprises two metal strips 15, which are crosswise, and an insulating coating 16, for example made of polyethylene covering the two strips. These internal strips of the rod form electrostatic partitions between the cells 14.
  • This ring is in particular produced by extrusion of the coating 16 on the two metal cross tapes 15.
  • the initially flat tapes are folded longitudinally at right angles on their axis and are held contiguous by their fold line, generally forming four branches with 90 ° from each other, just before the extrusion of the coating.
  • the edges of the ribbons can be flush with the coating, on the periphery of the rod, as shown in dotted lines, for continuity between the peripheral screen 13 and these interior ribbons.
  • the rod ring made of insulating material is extruded and is coated with a peripheral metallization, continuous from one fin to another.
  • the assembling of the pairs on the rod 10 is carried out as the rod travels through the point of committing the pairs.
  • the pairs are deposited in the different cells and the spiral rod, for example in a rotating machine, with the pairs in place in the cells.
  • the screen 13 is a metallic or mixed ribbon and then made of plastic and metal. It is ribbon-shaped in a helix around the rod and the pairs, as soon as the pairs are placed in the cells. This screen closes each V-shaped cell. Thus, each pair is individually shielded.
  • the protective sheath 5 is produced as soon as the screen 13 is put in place and is preferably extruded.
  • FIG. 2 shows an alternative embodiment of the cable according to the invention, the elements of which are identical to those of the cable in FIG. 1 are designated identically and are no longer described and the differences are only specified below.
  • the shielding of the individual pairs is ensured by a rod 20 of semi-conductive polymetric material, which can be very weakly conductive at low electric field and have an increasing conductivity as a function of the field, and by the screen 13 mentioned above.
  • This rod 20 likewise has radial fins 21.
  • the material of the rod 20 may in particular be of the type of that known from document EP-A-0 507 676, which comprises a polymer matrix having an electrical conductivity less than 10 -8 S / m, but likely to grow under the effect of the electric field.
  • the polymer matrix of this material comprises at least one first insulating, thermosplastic or thermosetting polymer, and at least one second conjugated, doped or dedoped polymer, having an electrical conductivity less than 10 -4 S / m but capable of growing under the effect of the electric field and being in a proportion of 5 to 70% by weight in said matrix. It can also contain a conductive filler, in particular carbon black.
  • the rod 20 is preferably extruded or can be produced by molding, injection or calendering.
  • the fins of the rod 20 likewise play the role of shielding partitions between the cells, the action of which is all the more effective that the influence of the pairs on each other is important in the absence of the shielding thus produced.
  • the cable according to the invention is faster and easier to industrialize than cables of circular section with shielding tape around each pair. It has a very high regularity of impedance, which makes it compatible with high speed transmissions. It is also easy and quick to equip on site with a terminal connector, since for access to the conductors of the pairs it is enough to draw the cable over a suitable length and remove the peripheral shielding over this length, then cut the rod, which represents a significant time saving. The risks of damaging the conductors or disturbing the arrangement of the pairs are also greatly avoided when mounting the connector.

Abstract

The spreaded structure for e.g. a 4-pair cable comprises two L-section folded metal cores (15) in contact along their apices, forming a conducting X-section over which are extruded polyethylene fins (16) Opt., the metal cores are omitted and the fins are of semi-conducting or carbon-loaded polymeric material. Twisted pairs (1,2,3,4), each comprising two insulated (6) cores (7) are laid up between (14) the fins and the screening is completed by foil or metallised tape wrapping (13) in contact with the fin edges. A protective sheath (5) is then extruded over all.

Description

La présente invention concerne les câbles à plusieurs paires de conducteurs électriques isolés individuellement de transmission de signaux haute fréquence et de faible diaphonie entre les paires, tels que les câbles informatiques. Elle porte plus particulièrement sur un tel câble multipaires, blindé par paire et aisé à raccorder.The present invention relates to cables with several pairs of individually insulated electrical conductors for transmitting high frequency and low crosstalk signals between the pairs, such as computer cables. It relates more particularly to such a multi-pair cable, shielded in pairs and easy to connect.

Dans ce type de câble, la paradiaphonie est un paramètre fondamental, qu'il est connu d'améliorer considérablement en blindant individuellement les paires du câble.In this type of cable, crosstalk is a fundamental parameter, which it is known to improve considerably by individually shielding the pairs of the cable.

La solution la plus classiquement adoptée pour blinder chaque paire est de rubanner en hélice un ruban métallique ou métallisé autour de chaque paire, avant d'assembler les paires blindées individuellement sous une même gaine de protection. L'opération de rubannage de chaque paire est une opération lente, qui est nécessairement effectuée en reprise sur chaque paire déjà constituée pour permettre d'obtenir des caractéristiques de transmission haute fréquence satisfaisantes. Une opération de rubannage faite au cours de la réalisation des paires ne convient pas, car le pas de rubannage est celui des conducteurs de chaque paire concernée et ne permet pas alors de garantir une régularité d'impédance compatible avec des transmission à hauts débits.The most conventionally adopted solution for shielding each pair is to helically tape a metallic or metallized ribbon around each pair, before assembling the individually shielded pairs under the same protective sheath. The taping operation of each pair is a slow operation, which is necessarily carried out in recovery on each pair already formed to allow obtaining high frequency transmission characteristics. A taping operation carried out during the making of the pairs is not suitable, since the taping step is that of the conductors of each pair concerned and therefore does not make it possible to guarantee a regularity of impedance compatible with high-speed transmissions.

Pour le raccordement du câble, les blindages individuels des paires doivent être enlevés pour l'accès aux conducteurs, ce qui rend longue et délicate l'opération de raccordement réalisée sur site.For cable connection, the individual shields of the pairs must be removed for access to the conductors, which makes the connection operation carried out on site long and delicate.

Le document GB-A-1546609 décrit un câble informatique à plusieurs paires blindées individuellement. Ce câble est un câble plat, dont les paires sont côte à côte. Le blindage des paires est réalisé par deux rubans, qui recouvrent l'ensemble des paires s'étendant entre eux et sont liés l'un à l'autre de part et d'autre de chacune des paires. Chaque ruban de blindage comporte une bande métallique, par exemple en aluminium, revêtue sur au moins l'une des ses faces d'un matériau thermoplastique et de préférence sur l'autre face d'une résine polyester synthétique. Les faces revêtues de matériau thermoplastique sont mises en vis-à-vis, pour leur liaison à chaud et la liaison résultante des deux rubans de blindage.GB-A-1546609 describes a computer cable with several individually shielded pairs. This cable is a flat cable, the pairs of which are side by side. The shielding of the pairs is carried out by two ribbons, which cover all of the pairs extending between them and are linked to each other on either side of each of the pairs. Each shielding tape comprises a metal strip, for example aluminum, coated on at least one of its faces with a thermoplastic material and preferably on the other face. synthetic polyester resin. The faces coated with thermoplastic material are placed opposite, for their hot bonding and the resulting bonding of the two shielding tapes.

Sur ce câble ou plus précisément sur les deux ou de préférence l'un seul des deux rubans, il est également prévu une ligne de déchirure le long de chaque zone de liaison des deux rubans entre les paires. De telles lignes de déchirure facilitent l'accès aux conducteurs des paires pour le raccordement du câble.On this cable or more precisely on the two or preferably only one of the two tapes, a tear line is also provided along each connection zone of the two tapes between the pairs. Such tear lines facilitate access to the conductors of the pairs for connection of the cable.

Un inconvénient de ce câble vient de sa structure plate, qui fait que le câble relativement large et flexible dans une seule direction a tendance à se vriller lors de sa pose. Ceci est notamment le cas lorsque ce câble plat comporte quatre paires, comme les câbles les plus utilisés dans les réseaux informatiques, et est alors très large. Il faudra le détordre en cours de pose et il deviendra très vulnérable à la traction.A disadvantage of this cable comes from its flat structure, which means that the relatively wide and flexible cable in one direction tends to twist when laid. This is particularly the case when this flat cable has four pairs, like the cables most used in computer networks, and is then very wide. You will have to untwist it during installation and it will become very vulnerable to traction.

Le document US-A-3819 443 divulgue un élément de blindage constitué par des bandes stratifiées de métal et plastique, qui sont coupées, pliées et assemblées les unes aux autres et définissent ainsi des branches radiales sur ledit élément. Il divulgue aussi un câble comportant un ensemble de conducteurs agencés en paires, ledit élément de blindage et une gaine isolante extérieure autour de l'ensemble des conducteurs. Dans ce câble, l'élément de blindage à branches radiales compartimente intérieurement le câble. Les différentes paires de ce câble sont ainsi séparées les unes des autres mais chacune d'elles n'est blindée que partiellement, ce qui n'est pas aussi efficace qu'un blindage prévu autour de chaque paire et n'est pas toujours satisfaisant.Document US-A-3819 443 discloses a shielding element constituted by laminated strips of metal and plastic, which are cut, folded and assembled to each other and thus define radial branches on said element. It also discloses a cable comprising a set of conductors arranged in pairs, said shielding element and an external insulating sheath around the set of conductors. In this cable, the shielding element with radial branches internally compartments the cable. The different pairs of this cable are thus separated from each other but each of them is only partially shielded, which is not as effective as a shield provided around each pair and is not always satisfactory.

La présente invention a pour but de réaliser un câble multipaires blindé par paire et aisé à raccorder, ayant une section circulaire et ne présentant pas les inconvénients du câble plat précité à paires blindées individuellement.The object of the present invention is to produce a multi-pair cable screened in pairs and easy to connect, having a circular section and not having the drawbacks of the above-mentioned flat cable with pairs screened individually.

Elle a pour objet un câble multipaires blindé par paire et aisé à raccorder, présentant une section circulaire et comportant plusieurs paires de conducteurs isolés individuellement et un blindage électrique autour de chaque paire, caractérisé en ce que les blindages électriques des différentes paires sont constitués par un jonc central à ailettes radiales, séparant les paires les unes des autres et assurant un blindage partiel de chacune d'elles, et par un écran périphérique entourant ledit jonc et l'ensemble des paires entre lesdites ailettes et complétant le blindage de chacune des paires.It relates to a multi-pair cable shielded in pairs and easy to connect, having a circular section and comprising several pairs of conductors isolated individually and an electrical shielding around each pair, characterized in that the electrical shieldings of the different pairs are constituted by a central rod with radial fins, separating the pairs from each other and ensuring a partial shielding of each of them, and by a peripheral screen surrounding said rod and the set of pairs between said fins and completing the shielding of each of the pairs.

Ce câble présente avantageusement en outre au moins l'une des caractéristiques additionnelles suivantes :

  • le jonc comporte au moins un ruban métallique intérieur aux ailettes et revêtu d'un enrobage commun isolant.
  • le jonc comporte un profilé constitué en matériau isolant et revêtu d'une métallisation périphérique continue d'une ailette à une autre.
  • le jonc est un profilé en matériau polymérique semi-conducteur. - le jonc est spiralé.
This cable advantageously also has at least one of the following additional characteristics:
  • the rod comprises at least one metallic strip inside the fins and coated with a common insulating coating.
  • the rod comprises a profile made of insulating material and coated with a continuous peripheral metallization from one fin to another.
  • the rod is a profile made of semiconductor polymer material. - the rod is spiraled.

Les caractéristiques et avantages de l'invention ressortiront de la description faite ci-après des exemples de réalisation illustrés dans le dessin ci-annexé, dans lequel :

  • la figure 1 est une vue en coupe d'un câble selon la présente invention,
  • la figure 2 est une vue en coupe d'une variante de réalisation de ce même câble.
The characteristics and advantages of the invention will emerge from the description given below of the exemplary embodiments illustrated in the attached drawing, in which:
  • FIG. 1 is a sectional view of a cable according to the present invention,
  • Figure 2 is a sectional view of an alternative embodiment of this same cable.

Le câble illustré dans les figures 1 et 2 est de section circulaire. Il comporte quatre paires 1 à 4 de conducteurs électriques, dont les paires sont blindées individuellement, et une gaine extérieure de protection 5 entourant l'ensemble des paires blindées.The cable illustrated in Figures 1 and 2 is of circular section. It comprises four pairs 1 to 4 of electrical conductors, the pairs of which are individually screened, and an outer protective sheath 5 surrounding all of the screened pairs.

Les conducteurs des paires sont identiques. Chacun comporte une âme conductrice telle que 6 et une isolation périphérique telle que 7. Les deux conducteurs électriques de chaque paire sont directement assemblés l'un à l'autre par torsion. Le câble peut bien entendu comporter un nombre différent de paires, les câbles à quatre paires étant cependant en pratique les plus utilisés dans les réseaux informatiques.The conductors of the pairs are identical. Each has a conductive core such as 6 and insulation peripheral such as 7. The two electrical conductors of each pair are directly assembled to each other by twisting. The cable can of course comprise a different number of pairs, the cables with four pairs being however in practice the most used in computer networks.

Dans la figure 1, le blindage des paires individuelles est réalisé par un jonc 10 à ailettes radiales 11, assurant la séparation des paires et le blindage partiel de chacune d'elles, et par un écran périphérique 13 entourant le jonc et l'ensemble des paires en place et complétant le blindage de chaque paire.In FIG. 1, the shielding of the individual pairs is carried out by a rod 10 with radial fins 11, ensuring the separation of the pairs and the partial shielding of each of them, and by a peripheral screen 13 surrounding the rod and all of the pairs in place and completing the shielding of each pair.

Pour ce câble à quatre paires, le jonc 10 à ailettes 11 est en forme de croix et définit quatre alvéoles en Vé telles que 14 recevant les quatre paires. Il comporte deux rubans métalliques 15, qui sont en croix, et un enrobage isolant 16, par exemple en polyéthylène recouvrant les deux rubans. Ces rubans intérieurs du jonc forment des cloisons électrostatiques entre les alvéoles 14.For this four-pair cable, the rod 10 with fins 11 is in the form of a cross and defines four V-shaped cells such that 14 receiving the four pairs. It comprises two metal strips 15, which are crosswise, and an insulating coating 16, for example made of polyethylene covering the two strips. These internal strips of the rod form electrostatic partitions between the cells 14.

Ce jonc est en particulier réalisé par extrusion de l'enrobage 16 sur les deux rubans métalliques en croix 15. Les rubans initialement plans sont pliés longitudinalement en équerre sur leur axe et sont maintenus jointifs par leur ligne de pliage, en formant globalement quatre branches à 90° l'une de l'autre, juste avant l'extrusion de l'enrobage. Les bords des rubans peuvent affleurer sur l'enrobage, sur la périphérie du jonc, ainsi qu'illustré en pointillés, pour une continuité entre l'écran périphérique 13 et ces rubans intérieurs.This ring is in particular produced by extrusion of the coating 16 on the two metal cross tapes 15. The initially flat tapes are folded longitudinally at right angles on their axis and are held contiguous by their fold line, generally forming four branches with 90 ° from each other, just before the extrusion of the coating. The edges of the ribbons can be flush with the coating, on the periphery of the rod, as shown in dotted lines, for continuity between the peripheral screen 13 and these interior ribbons.

Dans une variante de réalisation non représentée, le jonc à ailettes en matériau isolant est extrudé et est revêtu d'une métallisation périphérique, continue d'une ailette à l'autre.In an alternative embodiment not shown, the rod ring made of insulating material is extruded and is coated with a peripheral metallization, continuous from one fin to another.

L'assemblage des paires sur le jonc 10 est réalisé au fur et à mesure du défilement du jonc par le point de commettage des paires. Les paires sont déposées dans les différentes alvéoles et le jonc spiralé, par exemple dans une machine tournante, avec les paires en place dans les alvéoles.The assembling of the pairs on the rod 10 is carried out as the rod travels through the point of committing the pairs. The pairs are deposited in the different cells and the spiral rod, for example in a rotating machine, with the pairs in place in the cells.

L'écran 13 est un ruban métallique ou mixte et alors en plastique et métal. Il est rubanné en hélice autour du jonc et des paires, dès la mise en place des paires dans les alvéoles. Cet écran referme chaque alvéole en Vé. Ainsi, chaque paire se trouve blindée individuellement.The screen 13 is a metallic or mixed ribbon and then made of plastic and metal. It is ribbon-shaped in a helix around the rod and the pairs, as soon as the pairs are placed in the cells. This screen closes each V-shaped cell. Thus, each pair is individually shielded.

La gaine de protection 5 est réalisée dès la mise en place de l'écran 13 et est de préférence extrudée.The protective sheath 5 is produced as soon as the screen 13 is put in place and is preferably extruded.

La figure 2 montre une variante de réalisation du câble selon l'invention, dont les éléments identiques à ceux du câble de la figure 1 sont désignés identiquement et ne sont plus décrits et les différences sont seules précisées ci-après.FIG. 2 shows an alternative embodiment of the cable according to the invention, the elements of which are identical to those of the cable in FIG. 1 are designated identically and are no longer described and the differences are only specified below.

Dans cette figure 2, le blindage des paires individuelles est assuré par un jonc 20 en matériau polymétrique semi conducteur, qui peut être très faiblement conducteur à champ électrique bas et avoir une conductivité croissant en fonction du champ, et par l'écran 13 précité. Ce jonc 20 a pareillement des ailettes radiales 21. Le matériau du jonc 20 peut en particulier être du type de celui connu par le document EP-A-0 507 676, qui comporte une matrice polymérique ayant une conductivité électrique inférieure à 10-8 S/m, mais susceptible de croître sous l'effet du champ électrique. La matrice polymérique de ce matériau comporte au moins un premier polymère isolant, thermosplastique ou thermodurcissable, et au moins un second polymère conjugué, dopé ou dédopé, ayant une conductivité électrique inférieure à 10-4 S/m mais susceptible de croître sous l'effet du champ électrique et se trouvant dans une proportion de 5 à 70 % en poids dans ladite matrice. Elle peut contenir en outre une charge conductrice, en particulier du noir de carbone.In this FIG. 2, the shielding of the individual pairs is ensured by a rod 20 of semi-conductive polymetric material, which can be very weakly conductive at low electric field and have an increasing conductivity as a function of the field, and by the screen 13 mentioned above. This rod 20 likewise has radial fins 21. The material of the rod 20 may in particular be of the type of that known from document EP-A-0 507 676, which comprises a polymer matrix having an electrical conductivity less than 10 -8 S / m, but likely to grow under the effect of the electric field. The polymer matrix of this material comprises at least one first insulating, thermosplastic or thermosetting polymer, and at least one second conjugated, doped or dedoped polymer, having an electrical conductivity less than 10 -4 S / m but capable of growing under the effect of the electric field and being in a proportion of 5 to 70% by weight in said matrix. It can also contain a conductive filler, in particular carbon black.

Le jonc 20 est de préférence extrudé ou peut être réalisé par moulage, injection ou calandrage. Les ailettes du jonc 20 jouent pareillement le rôle de cloisons de blindage entre les alvéoles, dont l'action est d'autant plus efficace que l'influence des paires les unes sur les autres est importante en l'absence du blindage ainsi réalisé.The rod 20 is preferably extruded or can be produced by molding, injection or calendering. The fins of the rod 20 likewise play the role of shielding partitions between the cells, the action of which is all the more effective that the influence of the pairs on each other is important in the absence of the shielding thus produced.

Le câble selon l'invention est de réalisation plus rapide et plus facile à industrialiser que les câbles de section circulaire à ruban de blindage autour de chaque paire. Il présente une très grande régularité d'impédance, qui le rend compatible avec des transmissions à hauts débits. Il est en outre aisé et rapide à équiper sur site d'un connecteur terminal, puisque pour l'accès aux conducteurs des paires il suffit de dégainer le câble sur une longueur convenable et d'enlever le blindage périphérique sur cette longueur, puis de sectionner le jonc, ce qui représente un gain de temps important. Les risques d'endommager les conducteurs ou de perturber la disposition des paires sont également grandement évités au montage du connecteur.The cable according to the invention is faster and easier to industrialize than cables of circular section with shielding tape around each pair. It has a very high regularity of impedance, which makes it compatible with high speed transmissions. It is also easy and quick to equip on site with a terminal connector, since for access to the conductors of the pairs it is enough to draw the cable over a suitable length and remove the peripheral shielding over this length, then cut the rod, which represents a significant time saving. The risks of damaging the conductors or disturbing the arrangement of the pairs are also greatly avoided when mounting the connector.

Claims (7)

Câble multipaires blindé par paire et aisé à raccorder, présentant une section circulaire et comportant plusieurs paires de conducteurs isolés individuellement et un blindage électrique autour de chaque paire, caractérisé en ce que les blindages électriques des différentes paires (1-4) sont constitués par un jonc central (10, 20) à ailettes radiales (11, 21), séparant les paires les unes des autres et assurant un blindage partiel de chacune d'elles, et par un écran périphérique (13) entourant ledit jonc et l'ensemble des paires entre lesdites ailettes et complétant le blindage de chacune des paires.Multicore cable shielded in pairs and easy to connect, having a circular section and comprising several pairs of individually insulated conductors and an electrical shield around each pair, characterized in that the electrical shields of the different pairs (1-4) consist of a central rod (10, 20) with radial fins (11, 21), separating the pairs from each other and ensuring a partial shielding of each of them, and by a peripheral screen (13) surrounding said rod and all of the pairs between said fins and completing the shielding of each of the pairs. Câble selon la revendication 1, caractérisé en ce que ledit jonc (10) comporte au moins un ruban métallique (15) intérieur aux ailettes et revêtu d'un enrobage commun isolant (16).Cable according to claim 1, characterized in that said rod (10) comprises at least one metallic strip (15) inside the fins and coated with a common insulating coating (16). Câble selon la revendication 1, caractérisé en ce que ledit jonc (10) comporte un profilé constitué en matériau isolant et revêtu d'une métallisation périphérique continue d'une ailette à une autre.Cable according to claim 1, characterized in that said rod (10) comprises a profile made of insulating material and coated with a continuous peripheral metallization from one fin to another. Câble selon la revendication 1, caractérisé en ce que ledit jonc (10) est un profilé en matériau polymérique semi-conducteur.Cable according to claim 1, characterized in that said rod (10) is a profile made of semiconductor polymeric material. Câble selon l'un des revendications 2 à 4, caractérisé en ce que ledit jonc (10, 20) à ailettes est extrudé.Cable according to one of claims 2 to 4, characterized in that said rod ring (10, 20) is extruded. Câble selon l'une des revendications 1 à 5, caractérisé en ce que ledit jonc est à quatre ailettes définissant entre elles quatre alvéoles en V pour le câble alors à quatre paires.Cable according to one of claims 1 to 5, characterized in that said rod is with four fins defining between them four V-shaped cells for the cable then with four pairs. Câble selon l'une des revendications 1 à 6, caractérisé en ce que ledit jonc est spiralé.Cable according to one of claims 1 to 6, characterized in that said rod is spiral.
EP96401944A 1995-09-15 1996-09-12 Multi-pairs cable, shielded by pair and easy to connect Expired - Lifetime EP0763831B1 (en)

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FR9510844A FR2738947B1 (en) 1995-09-15 1995-09-15 MULTI-PAIR CABLE, SHIELDED PER PAIR AND EASY TO CONNECT
FR9510844 1995-09-15

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EP0763831A1 true EP0763831A1 (en) 1997-03-19
EP0763831B1 EP0763831B1 (en) 2001-11-14

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EP (1) EP0763831B1 (en)
DE (1) DE69616927T2 (en)
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NO (1) NO963816L (en)

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DE69616927D1 (en) 2001-12-20
US5952615A (en) 1999-09-14
US6566605B1 (en) 2003-05-20
NO963816L (en) 1997-03-17
NO963816D0 (en) 1996-09-12
FR2738947A1 (en) 1997-03-21
ES2163600T3 (en) 2002-02-01
FR2738947B1 (en) 1997-10-17
DE69616927T2 (en) 2002-06-27
EP0763831B1 (en) 2001-11-14

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