EP0669677B1 - Electrical connection device for conductive cable shields and method for its implementation - Google Patents

Electrical connection device for conductive cable shields and method for its implementation Download PDF

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Publication number
EP0669677B1
EP0669677B1 EP95420043A EP95420043A EP0669677B1 EP 0669677 B1 EP0669677 B1 EP 0669677B1 EP 95420043 A EP95420043 A EP 95420043A EP 95420043 A EP95420043 A EP 95420043A EP 0669677 B1 EP0669677 B1 EP 0669677B1
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EP
European Patent Office
Prior art keywords
cable
flexible
connector
electrical connection
conducting element
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.)
Expired - Lifetime
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EP95420043A
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German (de)
French (fr)
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EP0669677A1 (en
Inventor
Pierre Francois
Eric Sauer
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.)
Societe Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS
Original Assignee
Societe Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0512—Connections to an additional grounding conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H01R4/646—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for cables or flexible cylindrical bodies

Definitions

  • the present invention relates to an electrical connection device for screens conductive cables, in particular telecommunication cables.
  • This invention applies more particularly to cables provided with a very low protection screen thickness, consisting of a metallic layer, in particular of aluminum, covered with a insulating protective layer, such as polyethylene.
  • a screen with its device connection protects the cable it surrounds against radio interference and electromagnetic, and ensure grounding or grounding, for example by connecting a cable, belonging to an installation, to a structure receiving this installation, or ensure continuity between two screens.
  • connection devices for earthing comprising a body connector rigid capable of being supported in a zone of the periphery of a cylindrical object, and an element flexible filiform conductor provided for entangling said cylindrical object, means being provided on these devices for securing one end of the flexible conductive element to the body of the connector, and to immobilize, with controlled mechanical tensioning, the part of this flexible conductive element embracing said cylindrical object.
  • these connection devices are only intended for earthing metallic objects rigid, in particular of tubes, the flexible conducting element in the form of a small cable or tape being applied and clamped on the exterior surface of the rigid object such as tube.
  • the invention aims to avoid these drawbacks by providing a device allowing to make an electrical connection with the screen at any point along the cable length, on a small part of the periphery thereof, quickly and easily, without risk of damage to the screen or to the conductors belonging to the cable.
  • the invention essentially relates to a connection device electric for screens of conductive cables of the type concerned, the device being of the type comprising a rigid body connector capable of being supported in a region of the periphery of the cable, and a flexible filiform conductive element intended to entrap the cable, means being provided for securing one end of the flexible filiform conductive element to the connector body, and for a immobilization with controlled mechanical tensioning of the part of this element flexible conductor embracing the cable, the device being characterized in that the element flexible filiform conductor is produced in the form of a conductive braid or a flexible cable, forming a loop intended to be positioned in a groove transverse hollowed out in the outer insulating sheath of the cable over at least a fraction of its circumference, and reaching the screen, in that one end of the filiform conducting element flexible is secured to the connector body by means of a threaded tensioning member mechanically controlled, axially traversed by this end and in that, the body of the
  • the flexible conductive element thus forms a loop which takes place in a groove cut into the thickness of the outer insulating sheath of the cable and covering preferably an arc less than a full circumference, while the rigid body of the connector is supported on the part of the outer insulating sheath which has remained intact.
  • the threaded tensioning member mechanically controlled is an internally threaded sleeve, rotatably mounted but immobilized axially on the connector body, while the end of the element flexible conductor is provided with an externally threaded driver cooperating with the internal thread of the sleeve.
  • the mechanical tensioning screw and the locking screw are fuse head screws, allowing easy control of their tightening torque, therefore control of the tension of the flexible conducting element embracing the cable, and of its contact force on the screen, therefore optimal contact between this flexible conductive element and the screen belonging to the cable.
  • the connector is provided with a braid conductive, one end of which is integral with the body of this connector and intended to ensure the envisaged electrical connection: earthing of the cable screen, continuity, equipotentiality, flow of electromagnetic disturbances.
  • the free strand of the flexible conductive element can be cut as close as possible to the body of the connector, after immobilization and tensioning of this element around the cable.
  • the free strand of the element flexible, uncut, thread-like conductor is used to directly bond electrical, such as grounding the cable screen.
  • the free end of the connecting braid or the free end of the flexible filiform conductive element is advantageously provided with a terminal, for crimping or to be fixed by any other means, such as screwing, for example on a ground plane.
  • connection device object of the invention can still include sealing and insulating means surrounding the connector and the cable.
  • the invention also relates to a method of making a connection electric for screens of conductive cables of the type concerned, with implementation of the connection device defined above.
  • the bleeding is carried out on a fraction of the circumference complete of the cable, for example in an arc of approximately 300 °, so as to leave remain a part of integral outer sheath on which is applied the body of the connector.
  • the bleeding is dug in the insulating outer sheath of the cable by using a flexible threadlike element of the rope type, encircling the cable and subjected to a back and forth movement.
  • the bleeding is thus easily formed, at the desired point on the cable, by a mechanical abrasion effect or by an effect thermal (local fusion of the cable insulating sheath), or by the combination of these two effects.
  • the operator, printing the rope back and forth preferably thanks to gripping means such as handles equipping the two ends of the rope, easily perceives the contact of this rope with the screen; the back and forth movement can even be chased on the screen without limit, because the risk of damage to the screen is here practically zero, whatever the nature of this screen.
  • the groove formed in the insulating sheath can immediately receive the conductive element flexible connector, then brought to the cable.
  • the establishment of the connector does not require engaging the conductive element around the cable by one end of it.
  • the connector can be installed on a cable without accessibility at the ends, the flexible filiform conductive element being wound, on a lathe, around the cable, before being brought back and blocked on the connector body.
  • the device comprises a connector, generally designated by the reference 1, in which there is mainly a rigid body 2 made of electrically material conductive, such as a copper alloy, and a flexible filiform conductive element 3, is having like a conductive braid or a flexible cable, for example of steel stainless.
  • the device also comprises a connecting braid 4, mechanically and electrically connected to the rigid body 2 of the connector 1.
  • This rigid body 2 comprises a base 5 of curved profile, designed to take support in a zone of the periphery of a cable 6 with protective screen 7.
  • a threaded hole 8 and a channel 9 which one and the other cross this massive part on both sides, in different planes.
  • a tensioning screw 10 provided with an axial bore 11 and a fuse head 12.
  • a first end of the cable 3 passes through the axial bore 11 of the screw 10, and is provided with an enlarged head 13 which takes pressing on an internal retaining shoulder formed in the axial bore 11 of the screw 10.
  • the flexible cable 3 is provided to form, in the position of use of the connector 1, a loop embracing the cable 6, the strand of cable 3 which forms the end of the loop being introduced through the transverse channel 9 of the body 2.
  • this body 2 is formed another tapped hole, opening into the channel 9 and receiving a locking screw 14 to fuse head 15.
  • the loop formed by the cable 3 embracing the cable 6 is engaged in a transverse groove, hollowed out in the insulating outer sheath 16 of the cable 6 (in a way described in detail below) over at least a fraction of its circumference, the bottom of the groove reaching the protective screen 7.
  • the locking of the cable 3 by tightening the screw 14, followed of its controlled mechanical tensioning around the cable 6 by tightening the screw 10, ensures the mechanical connection and the electrical contact between the screen 7 belonging to the cable 6, on the one hand, and the cable 3, therefore the body 2 of the connector 1, on the other hand.
  • Braid 4 which can be made of copper like a bare braid, or coated with a like a small cable, here provides the desired electrical connection between connector 1 and a external element not shown, such as ground network.
  • the first end of the braid 4 is crimped at 17 onto the rigid body 2 of the connector 1.
  • the other end, initially free, braid 4 is provided with a terminal 18, designed to be crimped, screwed, welded or fixed by any other means on said external element, so as to ensure electrical continuity.
  • the free strand 19 of the cable 3, that is to say the part not forming the loop and situated beyond the body 2 of the connector 1, can here be cut as close as possible to the body 2 and eliminated, as illustrated in FIG. 3.
  • FIGS. 4 and 5 represent a second embodiment of the invention, in which the rigid body 2 of the connector 1 comprises, in addition to a solid part with hole threaded receiving the tensioning screw 10 of the cable 3, a tab in which is formed a notch 20.
  • a tapped hole, opening into the notch 20, receives a screw blocking 14 with fuse head 15, of axis parallel to the tensioning screw 10, and located in the same transverse plane.
  • the cable 3, forming in a transverse plane a loop which embraces the cable 6, has a part locked in the notch 20 by the screw 14 and, beyond this part, a free strand 19 which is here bent at a right angle and brought in a direction parallel to the axis of the cable 6.
  • the free strand 19 of the cable 3 serves here as a connecting element (replacing the braid 4 of the first embodiment).
  • a terminal 18 to be crimped or screwed is provided for the end of the free strand 19 of the cable 3.
  • the loop formed by this cable 3 is engaged in a groove 21, hollowed out in the outer sheath insulating 16 of the cable 6 and reaching the protective screen 7 of this cable 6.
  • Figures 6 and 7 show a third embodiment, which is different from the previous ones by the constitution of the mechanical tensioning means controlled part of the flexible cable 3 embracing the cable 6.
  • the body 2 of the connector 1 here has a smooth hole 8A receiving a socket 10A smooth on the outside and internally threaded, mounted revolving but immobilized axially on the body 2, the sleeve 10A comprising for this purpose an annular groove 26 cooperating with a complementary part belonging to the body 2.
  • This socket 10A is provided with a 12A fuse operating head allowing mechanical tensioning controlled.
  • the end of the cable 3 is provided with a driver 13a, produced in the form an externally threaded ring, and secured to this end.
  • Coach 13A takes place inside the socket 10A, the external thread of the driver 13A being complementary to the internal thread of the socket 10A.
  • the coach 13A Before tightening, as shown in Figure 6, the coach 13A is located towards the end of the socket 10A remote from the operating head 12A. Manual operation of this operating head 12A, rotating the socket 10A, causes it to be screwed onto the coach 13A and, consequently, an advance of the coach 13A in the direction of said operating head 12A, until desired tightening - see Figure 7 showing the configuration obtained at the end of controlled mechanical tensioning of the cable 3 after breaking of the fuse head.
  • an anti-vibration O-ring 27 can here be mounted and compressed between the operating head 12A of the socket 10A and the entry of the smooth hole 8A of the body 2.
  • the method of implementing the device described above comprises, in a first step, the digging of the groove 21 in the insulating outer sheath 16 of the cable 6.
  • the digging of this groove 21 can be carried out using of a material constituted by a cord 22, or other flexible filiform member of the same kind, both ends of which are advantageously provided with respective grips 23 and 24.
  • the rope 22 is brought so as to encircle the cable 6, the two free strands formed by the end regions of this intersecting cord 22.
  • a back and forth movement is printed on cord 22, along arrow F, by the operator entering this cord by its ends, in particular by the two handles 23 and 24.
  • the cord 22 hollow gradually, by mechanical and / or thermal effect, in the insulating outer sheath 16 of the cable 6, a groove 21 which extends over an arc of a circle less than one complete revolution, covering for example around 300 °, an integral zone 25 remaining between the two ends of the groove 21 - see figure 9.
  • the operator removes the cord 22 and proceeds with the setting in place of connector 1, applying body 2 of connector to zone 25 and engaging the cable 3 in the groove 21, to form a loop before returning to the body 2 where the locking of the cable 3 is effected by means of the screw 14 with a fuse head 15 forming torque limiter. Then, there is manual mechanical tensioning controlled loop on the screen 7 by tightening the screw 10, whose fuse head 12 plays also the role of torque limiter.
  • the electrical connection is made with an external element either at using the free end 19 of the cable 3, or using the braid 4.
  • connection device can be placed at the end of the cable, at a point through a cable with no accessibility at the ends, around an accessible cable only on a short length, or on an accessible cable only on a reduced angle.
  • the connection device in question is also adaptable to cables for transporting electrical energy, for video network cables, for coaxial cables, as well as insulated sheaths or guides, the constitution and geometry of these cables or analogs can be various.
  • the same connection device is adaptable, without modification, to cables of various diameters, forming with the cable a loop of varying length wrapping the cable.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Cable Accessories (AREA)
  • Multi-Conductor Connections (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The connection system for providing connection to the metal screen (7) around the cable (6) includes a connector (1) with a rigid body (2) which is intended to applied to the side of the cable. A flexible wire conductor element (3) is provided to surround the cable lying in a transverse peripheral groove (21). The rigid body includes a tensioning mechanism for the flexible wire so that the wire may be pulled tightly around the main cable ensuring a good electrical connection. The wire may cut through an outer insulating sleeve which surrounds the conducting metal screen with which contact is to be made.

Description

La présente invention concerne un dispositif de connexion électrique pour écrans de câbles conducteurs, en particulier de câbles de télécommunication. Cette invention s'applique plus particulièrement à des câbles pourvus d'un écran de protection de très faible épaisseur, constitué d'une couche métallique, notamment d'aluminium, recouverte d'une couche protectrice isolante, telle qu'en polyéthylène. Un tel écran avec son dispositif de connexion permet de protéger le câble qu'il entoure contre les perturbations radioélectriques et électromagnétiques, et d'assurer les mises à la terre ou à la masse, en reliant par exemple un câble, appartenant à une installation, à une structure recevant cette installation, ou d'assurer la continuité entre deux écrans.The present invention relates to an electrical connection device for screens conductive cables, in particular telecommunication cables. This invention applies more particularly to cables provided with a very low protection screen thickness, consisting of a metallic layer, in particular of aluminum, covered with a insulating protective layer, such as polyethylene. Such a screen with its device connection protects the cable it surrounds against radio interference and electromagnetic, and ensure grounding or grounding, for example by connecting a cable, belonging to an installation, to a structure receiving this installation, or ensure continuity between two screens.

On connaít, plus particulièrement, des réalisations avec écran de protection en aluminium ayant une épaisseur comprise entre 80 et 200 microns, recouvert d'un film protecteur en polyéthylène d'une épaisseur de quelques microns, maintenu par adhérence (plastification de l'aluminium). L'écran ainsi constitué est intercalé entre le faisceau de conducteurs électriques du câble et une gaine extérieure isolante, la mise en place de cet écran et de la gaine extérieure étant réalisables par extrusion.We know, more particularly, realizations with protective screen in aluminum with a thickness between 80 and 200 microns, covered with a film polyethylene protector a few microns thick, held by adhesion (plasticization of aluminum). The screen thus formed is interposed between the beam of electrical conductors of the cable and an insulating outer sheath, the installation of this screen and outer sheath being achievable by extrusion.

Considérant ce genre de réalisation de câbles avec écran de protection, on rencontre actuellement des difficultés pour l'exécution d'une connexion électrique fiable avec l'écran, en vue d'une mise à la terre ou d'une reprise du potentiel ou de la continuité de cet écran. Ces difficultés de réalisation d'une connexion résultent de l'adhésion de l'écran sur la gaine extérieure, et de la faible épaisseur dudit écran. La connexion est habituellement réalisée sur le site, en extrémité de câble, et elle consiste à découper plus ou moins commodément une fenêtre ou autre interruption dans la gaine extérieure, puis à mettre en place une griffe de liaison avec un autre câble pour assurer la continuité électrique de l'écran ou sa mise à la terre (voir document US-A-4051323 ou son équivalent FR-A-2368156). Lors de la découpe de la fenêtre et de la mise en place de la griffe de liaison, il existe un risque d'abímer l'écran et/ou de détériorer les conducteurs du câble.Considering this kind of realization of cables with protective screen, we is currently experiencing difficulties in performing a reliable electrical connection with the screen, with a view to earthing or resuming the potential or continuity of this screen. These difficulties in making a connection result from the adhesion of the screen to the outer sheath, and the small thickness of said screen. Connection is usually made on site, at the end of the cable, and it consists of cutting more or less conveniently a window or other interruption in the outer sheath, then put in places a connecting claw with another cable to ensure electrical continuity of the screen or its earthing (see document US-A-4051323 or its equivalent FR-A-2368156). When cutting the window and installing the link claw, there is a risk damage the screen and / or damage the cable conductors.

On connaít aussi, par les documents US-A-1935085 et GB-A-2245772, des dispositifs de connexion électrique pour mise à la terre, comprenant un connecteur à corps rigide apte à prendre appui en une zone de la périphérie d'un objet cylindrique, et un élément conducteur filiforme flexible prévu pour enlacer ledit objet cylindrique, des moyens étant prévus sur ces dispositifs pour amarrer une extrémité de l'élément conducteur flexible sur le corps du connecteur, et pour immobiliser, avec une mise en tension mécanique contrôlée, la partie de cet élément conducteur flexible enlaçant ledit objet cylindrique. Toutefois, ces dispositifs de connexion sont seulement prévus pour la mise à la terre d'objets métalliques rigides, notamment de tubes, l'élément conducteur flexible en forme de petit câble ou de bande étant appliqué et serré sur la surface extérieure de l'objet rigide tel que tube. Les dispositifs connus ici évoqués ne sont ni destinés, ni adaptés à la mise à la terre d'un écran de protection de très faible épaisseur, situé sous la gaine isolante d'un câble de télécommunications. En particulier, ces dispositifs possèdent des parties qui blesseraient le câble, et notamment détérioreraient son écran, d'une manière irrémédiable.We also know, from documents US-A-1935085 and GB-A-2245772, electrical connection devices for earthing, comprising a body connector rigid capable of being supported in a zone of the periphery of a cylindrical object, and an element flexible filiform conductor provided for entangling said cylindrical object, means being provided on these devices for securing one end of the flexible conductive element to the body of the connector, and to immobilize, with controlled mechanical tensioning, the part of this flexible conductive element embracing said cylindrical object. However, these connection devices are only intended for earthing metallic objects rigid, in particular of tubes, the flexible conducting element in the form of a small cable or tape being applied and clamped on the exterior surface of the rigid object such as tube. The known devices mentioned here are neither intended nor adapted to the grounding of a screen very thin protection, located under the insulating sheath of a cable telecommunications. In particular, these devices have parts which would injure the cable, and in particular would damage its screen, in an irreversible manner.

L'invention vise à éviter ces inconvénients, en fournissant un dispositif permettant de réaliser une connexion électrique avec l'écran en tout point de la longueur du câble, sur une faible partie de la périphérie de celui-ci, de façon simple et rapide, sans risque de détérioration de l'écran ni des conducteurs appartenant au câble.The invention aims to avoid these drawbacks by providing a device allowing to make an electrical connection with the screen at any point along the cable length, on a small part of the periphery thereof, quickly and easily, without risk of damage to the screen or to the conductors belonging to the cable.

A cet effet, l'invention a essentiellement pour objet un dispositif de connexion électrique pour écrans de câbles conducteurs du genre concerné, le dispositif étant du genre comprenant un connecteur à corps rigide apte à prendre appui en une zone de la périphérie du câble, et un élément conducteur filiforme flexible prévu pour enlacer le câble, des moyens étant prévus pour amarrer une extrémité de l'élément conducteur filiforme flexible sur le corps du connecteur, et pour une immobilisation avec mise en tension mécanique contrôlée de la partie de cet élément conducteur flexible enlaçant le câble, le dispositif étant caractérisé en ce que l'élément conducteur filiforme flexible est réalisé sous la forme d'une tresse conductrice ou d'une câblette souple, formant une boucle prévue pour être positionnée dans une saignée transversale creusée dans la gaine extérieure isolante du câble sur au moins une fraction de sa circonférence, et atteignant l'écran, en ce qu'une extrémité de l'élément conducteur filiforme flexible est amarrée au corps du connecteur au moyen d'un organe fileté de mise en tension mécanique contrôlée, traversé axialement par cette extrémité et en ce que, le corps du connecteur comporte un logement tel qu'un canal ou encoche recevant le brin de l'élément conducteur flexible formant l'extrémité de la boucle enlaçant le câble, une vis de blocage étant prévue pour l'immobilisation de ce brin de l'élément conducteur flexible dans ledit logement.To this end, the invention essentially relates to a connection device electric for screens of conductive cables of the type concerned, the device being of the type comprising a rigid body connector capable of being supported in a region of the periphery of the cable, and a flexible filiform conductive element intended to entrap the cable, means being provided for securing one end of the flexible filiform conductive element to the connector body, and for a immobilization with controlled mechanical tensioning of the part of this element flexible conductor embracing the cable, the device being characterized in that the element flexible filiform conductor is produced in the form of a conductive braid or a flexible cable, forming a loop intended to be positioned in a groove transverse hollowed out in the outer insulating sheath of the cable over at least a fraction of its circumference, and reaching the screen, in that one end of the filiform conducting element flexible is secured to the connector body by means of a threaded tensioning member mechanically controlled, axially traversed by this end and in that, the body of the connector comprises a housing such as a channel or notch receiving the strand of the element flexible conductor forming the end of the loop embracing the cable, a locking screw being provided for immobilizing this strand of the flexible conductive element in said housing.

L'élément conducteur flexible forme ainsi une boucle qui prend place dans une saignée creusée dans l'épaisseur de la gaine extérieure isolante du câble et couvrant de préférence un arc de cercle inférieur à une circonférence complète, tandis que le corps rigide du connecteur prend appui sur la partie de la gaine extérieure isolante restée intègre.The flexible conductive element thus forms a loop which takes place in a groove cut into the thickness of the outer insulating sheath of the cable and covering preferably an arc less than a full circumference, while the rigid body of the connector is supported on the part of the outer insulating sheath which has remained intact.

Dans un mode de réalisation avantageux, l'organe fileté de mise en tension mécanique contrôlée est une douille filetée intérieurement, montée tournante mais immobilisée axialement sur le corps du connecteur, tandis que l'extrémité de l'élément conducteur flexible est pourvue d'un entraíneur fileté extérieurement, coopérant avec le filetage intérieur de la douille.In an advantageous embodiment, the threaded tensioning member mechanically controlled is an internally threaded sleeve, rotatably mounted but immobilized axially on the connector body, while the end of the element flexible conductor is provided with an externally threaded driver cooperating with the internal thread of the sleeve.

Avantageusement, la vis de mise en tension mécanique et la vis de blocage sont des vis à tête fusible, permettant un contrôle aisé de leur couple de serrage, donc une maítrise de la tension de l'élément conducteur flexible enlaçant le câble, et de son effort de contact sur l'écran, donc un contact optimal entre cet élément conducteur flexible et l'écran appartenant au câble.Advantageously, the mechanical tensioning screw and the locking screw are fuse head screws, allowing easy control of their tightening torque, therefore control of the tension of the flexible conducting element embracing the cable, and of its contact force on the screen, therefore optimal contact between this flexible conductive element and the screen belonging to the cable.

Selon un mode d'exécution particulier, le connecteur est pourvu d'une tresse conductrice, dont une extrémité est solidaire du corps de ce connecteur et prévue pour assurer la liaison électrique envisagée : mise à la terre de l'écran du câble, continuité, équipotentialité, écoulement des perturbations électromagnétiques. Dans ce cas, le brin libre de l'élément conducteur flexible peut être coupé au plus près du corps du connecteur, après immobilisation et mise en tension de cet élément autour du câble.According to a particular embodiment, the connector is provided with a braid conductive, one end of which is integral with the body of this connector and intended to ensure the envisaged electrical connection: earthing of the cable screen, continuity, equipotentiality, flow of electromagnetic disturbances. In this case, the free strand of the flexible conductive element can be cut as close as possible to the body of the connector, after immobilization and tensioning of this element around the cable.

Selon une autre possibilité, supprimant la tresse précitée, le brin libre de l'élément conducteur filiforme flexible, non coupé, est utilisé pour assurer directement la liaison électrique envisagée, telle que mise à la terre de l'écran du câble. According to another possibility, removing the aforementioned braid, the free strand of the element flexible, uncut, thread-like conductor is used to directly bond electrical, such as grounding the cable screen.

A cet effet, selon le cas, l'extrémité libre de la tresse de liaison ou l'extrémité libre de l'élément conducteur filiforme flexible est avantageusement munie d'une cosse, à sertir ou à fixer par tout autre moyen, tel que vissage, par exemple sur un plan de masse.For this purpose, as appropriate, the free end of the connecting braid or the free end of the flexible filiform conductive element is advantageously provided with a terminal, for crimping or to be fixed by any other means, such as screwing, for example on a ground plane.

Dans son état définitif, le dispositif de connexion objet de l'invention peut encore comprendre des moyens d'étanchéité et d'isolation entourant le connecteur ainsi que le câble.In its final state, the connection device object of the invention can still include sealing and insulating means surrounding the connector and the cable.

L'invention a aussi pour objet un procédé de réalisation d'une connexion électrique pour écrans de câbles conducteurs du genre concerné, avec mise en oeuvre du dispositif de connexion défini ci-dessus.The invention also relates to a method of making a connection electric for screens of conductive cables of the type concerned, with implementation of the connection device defined above.

Ce procédé consiste essentiellement :

  • à creuser dans la gaine extérieure isolante du câble, sur au moins une fraction de sa circonférence, une saignée dont le fond atteint l'écran, la saignée étant creusée par utilisation d'un élément souple filiforme du genre corde, ceinturant le câble et soumis à un mouvement de va-et-vient, formant cette saignée par un effet mécanique et/ou par un effet thermique,
  • à engager dans la saignée l'élément conducteur filiforme flexible du dispositif précité, en formant une boucle, tandis que le corps du connecteur est appliqué en une zone de la périphérie du câble,
  • à immobiliser et mettre en tension mécaniquement et de façon contrôlée l'élément conducteur flexible, et
  • à réaliser la liaison électrique envisagée entre le connecteur et un élément extérieur.
This process essentially consists of:
  • to dig into the insulating outer sheath of the cable, over at least a fraction of its circumference, a groove whose bottom reaches the screen, the groove being dug by the use of a flexible, threadlike element of the rope type, encircling the cable and subjected to a back and forth movement, forming this bleeding by a mechanical effect and / or by a thermal effect,
  • in engaging the flexible filiform conductive element of the aforementioned device into the groove, by forming a loop, while the body of the connector is applied in an area of the periphery of the cable,
  • immobilizing and tensioning the flexible conductive element mechanically and in a controlled manner, and
  • to make the envisaged electrical connection between the connector and an external element.

De préférence, la saignée est réalisée sur une fraction de la circonférence complète du câble, par exemple selon un arc de cercle d'environ 300°, de manière à laisser subsister une partie de gaine extérieure intègre sur laquelle est appliqué le corps du connecteur.Preferably, the bleeding is carried out on a fraction of the circumference complete of the cable, for example in an arc of approximately 300 °, so as to leave remain a part of integral outer sheath on which is applied the body of the connector.

Selon un mode de mise en oeuvre du procédé, la saignée est creusée dans la gaine extérieure isolante du câble par utilisation d'un élément souple filiforme du genre corde, ceinturant le câble et soumis à un mouvement de va-et-vient. La saignée est ainsi facilement formée, au point désiré sur le câble, par un effet mécanique d'abrasion ou par un effet thermique (fusion locale de la gaine isolante du câble), ou encore par la combinaison de ces deux effets. L'opérateur, imprimant à la corde un mouvement de va-et-vient de préférence grâce à des moyens de préhension tels que poignées équipant les deux extrémités de la corde, perçoit facilement le contact de cette corde avec l'écran ; le mouvement de va-et-vient peut même être poursuivi sur l'écran sans limite, car le risque d'endommagement de l'écran est ici pratiquement nul, quelle que soit la nature de cet écran. Une fois libérée de la corde, la saignée formée dans la gaine isolante peut immédiatement recevoir l'élément conducteur flexible du connecteur, alors amené vers le câble. On notera que la mise en place du connecteur ne nécessite pas d'engager l'élément conducteur autour du câble par une extrémité de celui-ci. Bien au contraire, le connecteur peut être mis en place sur un câble sans accessibilité aux extrémités, l'élément conducteur filiforme flexible étant enroulé, sur un tour, autour du câble, avant d'être ramené et bloqué sur le corps du connecteur.According to one embodiment of the method, the bleeding is dug in the insulating outer sheath of the cable by using a flexible threadlike element of the rope type, encircling the cable and subjected to a back and forth movement. The bleeding is thus easily formed, at the desired point on the cable, by a mechanical abrasion effect or by an effect thermal (local fusion of the cable insulating sheath), or by the combination of these two effects. The operator, printing the rope back and forth preferably thanks to gripping means such as handles equipping the two ends of the rope, easily perceives the contact of this rope with the screen; the back and forth movement can even be chased on the screen without limit, because the risk of damage to the screen is here practically zero, whatever the nature of this screen. Once released from the rope, the groove formed in the insulating sheath can immediately receive the conductive element flexible connector, then brought to the cable. Note that the establishment of the connector does not require engaging the conductive element around the cable by one end of it. On the contrary, the connector can be installed on a cable without accessibility at the ends, the flexible filiform conductive element being wound, on a lathe, around the cable, before being brought back and blocked on the connector body.

L'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemples, trois formes de réalisation de ce dispositif de connexion électrique pour écrans de câbles conducteurs, et illustrant le procédé de mise en oeuvre de ce dispositif.

  • Figure 1 est une vue en perspective du dispositif objet de l'invention, dans une première forme d'exécution,
  • Figure 2 est une vue de face du dispositif de figure 1, mis en place autour d'un câble,
  • Figure 3 est une vue en plan par dessus correspondant à figure 2,
  • Figure 4 est une vue en perspective montrant une deuxième forme d'exécution du dispositif de connexion selon l'invention,
  • Figure 5 est une autre vue en perspective du dispositif de figure 4,
  • Figures 6 et 7 sont des vues en coupe d'une troisième forme d'exécution de ce dispositif de connexion, avant et après mise en tension de l'élément conducteur flexible,
  • Figures 8 et 9 sont des schémas illustrant le mode de creusement de la saignée sur le câble recevant le dispositif de connexion.
    • The invention will be better understood with the aid of the description which follows, with reference to the appended diagrammatic drawing representing, by way of examples, three embodiments of this electrical connection device for screens of conductive cables, and illustrating the method of implementation of this device.
  • FIG. 1 is a perspective view of the device which is the subject of the invention, in a first embodiment,
  • FIG. 2 is a front view of the device in FIG. 1, placed around a cable,
  • FIG. 3 is a plan view from above corresponding to FIG. 2,
  • FIG. 4 is a perspective view showing a second embodiment of the connection device according to the invention,
  • FIG. 5 is another perspective view of the device of FIG. 4,
  • FIGS. 6 and 7 are sectional views of a third embodiment of this connection device, before and after tensioning of the flexible conductive element,
  • Figures 8 and 9 are diagrams illustrating the method of digging the groove on the cable receiving the connection device.

    • Comme le montrent les figures 1 à 3, relatives à une première forme de réalisation, le dispositif comprend un connecteur, désigné dans son ensemble par le repère 1, dans lequel on distingue principalement un corps rigide 2 en matériau électriquement conducteur, tel qu'alliage cuivreux, et un élément conducteur filiforme flexible 3, se présentant comme une tresse conductrice ou une câblette souple, par exemple en acier inoxydable. Dans cette première forme de réalisation, le dispositif comprend encore une tresse de liaison 4, raccordée mécaniquement et électriquement au corps rigide 2 du connecteur 1.As shown in Figures 1 to 3, relating to a first form of embodiment, the device comprises a connector, generally designated by the reference 1, in which there is mainly a rigid body 2 made of electrically material conductive, such as a copper alloy, and a flexible filiform conductive element 3, is having like a conductive braid or a flexible cable, for example of steel stainless. In this first embodiment, the device also comprises a connecting braid 4, mechanically and electrically connected to the rigid body 2 of the connector 1.

    Ce corps rigide 2 comporte une embase 5 de profil incurvé, prévue pour prendre appui en une zone de la périphérie d'un câble 6 avec écran de protection 7. Dans la partie massive du corps 2, sont ménagés transversalement un trou taraudé 8 et un canal 9, qui l'un et l'autre traversent cette partie massive de part et d'autre, dans des plans différents.This rigid body 2 comprises a base 5 of curved profile, designed to take support in a zone of the periphery of a cable 6 with protective screen 7. In the part massive body 2, are formed transversely a threaded hole 8 and a channel 9, which one and the other cross this massive part on both sides, in different planes.

    Dans le trou taraudé 8 du corps 2 est introduite une vis de mise en tension 10, pourvue d'un perçage axial 11 et d'une tête fusible 12. Une première extrémité de la câblette 3 traverse le perçage axial 11 de la vis 10, et est pourvue d'une tête élargie 13 qui prend appui sur un épaulement interne de retenue formé dans le perçage axial 11 de la vis 10.In the threaded hole 8 of the body 2 is introduced a tensioning screw 10, provided with an axial bore 11 and a fuse head 12. A first end of the cable 3 passes through the axial bore 11 of the screw 10, and is provided with an enlarged head 13 which takes pressing on an internal retaining shoulder formed in the axial bore 11 of the screw 10.

    La câblette souple 3 est prévue pour former, en position d'utilisation du connecteur 1, une boucle enlaçant le câble 6, le brin de câblette 3 qui forme l'extrémité de la boucle étant introduit au travers du canal transversal 9 du corps 2. Dans ce corps 2 est ménagé un autre trou taraudé, débouchant dans le canal 9 et recevant une vis de blocage 14 à tête fusible 15.The flexible cable 3 is provided to form, in the position of use of the connector 1, a loop embracing the cable 6, the strand of cable 3 which forms the end of the loop being introduced through the transverse channel 9 of the body 2. In this body 2 is formed another tapped hole, opening into the channel 9 and receiving a locking screw 14 to fuse head 15.

    La boucle formée par la câblette 3 enlaçant le câble 6 est engagée dans une saignée transversale, creusée dans la gaine extérieure isolante 16 du câble 6 (d'une manière décrite en détail plus bas) sur au moins une fraction de sa circonférence, le fond de la saignée atteignant l'écran de protection 7. Le blocage de la câblette 3 par serrage de la vis 14, suivi de sa mise en tension mécanique contrôlée autour du câble 6 par serrage de la vis 10, assure la liaison mécanique et le contact électrique entre l'écran 7 appartenant au câble 6, d'une part, et la câblette 3, donc le corps 2 du connecteur 1, d'autre part.The loop formed by the cable 3 embracing the cable 6 is engaged in a transverse groove, hollowed out in the insulating outer sheath 16 of the cable 6 (in a way described in detail below) over at least a fraction of its circumference, the bottom of the groove reaching the protective screen 7. The locking of the cable 3 by tightening the screw 14, followed of its controlled mechanical tensioning around the cable 6 by tightening the screw 10, ensures the mechanical connection and the electrical contact between the screen 7 belonging to the cable 6, on the one hand, and the cable 3, therefore the body 2 of the connector 1, on the other hand.

    La tresse 4, réalisable en cuivre comme une tresse nue, ou revêtue d'un isolant à la manière d'un petit câble, assure ici la liaison électrique désirée entre le connecteur 1 et un élément extérieur non représenté, tel que réseau de masse. La première extrémité de la tresse 4 est sertie en 17 sur le corps rigide 2 du connecteur 1. L'autre extrémité, initialement libre, de la tresse 4 est pourvue d'une cosse 18, conçue pour être sertie, vissée, soudée ou fixée par tout autre moyen sur ledit élément extérieur, de manière à assurer une continuité électrique.Braid 4, which can be made of copper like a bare braid, or coated with a like a small cable, here provides the desired electrical connection between connector 1 and a external element not shown, such as ground network. The first end of the braid 4 is crimped at 17 onto the rigid body 2 of the connector 1. The other end, initially free, braid 4 is provided with a terminal 18, designed to be crimped, screwed, welded or fixed by any other means on said external element, so as to ensure electrical continuity.

    En raison de la présence de la tresse de liaison 4, le brin libre 19 de la câblette 3, c'est-à-dire la partie ne formant pas la boucle et située au-delà du corps 2 du connecteur 1, peut ici être coupée au plus près du corps 2 et éliminée, comme illustré à la figure 3.Due to the presence of the connecting braid 4, the free strand 19 of the cable 3, that is to say the part not forming the loop and situated beyond the body 2 of the connector 1, can here be cut as close as possible to the body 2 and eliminated, as illustrated in FIG. 3.

    Les figures 4 et 5 représentent une deuxième forme de réalisation de l'invention, dans laquelle le corps rigide 2 du connecteur 1 comprend, outre une partie massive avec trou taraudé recevant la vis de mise en tension 10 de la câblette 3, une patte dans laquelle est ménagée une encoche 20. Un trou taraudé, débouchant dans l'encoche 20, reçoit une vis de blocage 14 à tête fusible 15, d'axe parallèle à la vis de mise en tension 10, et située dans le même plan transversal.FIGS. 4 and 5 represent a second embodiment of the invention, in which the rigid body 2 of the connector 1 comprises, in addition to a solid part with hole threaded receiving the tensioning screw 10 of the cable 3, a tab in which is formed a notch 20. A tapped hole, opening into the notch 20, receives a screw blocking 14 with fuse head 15, of axis parallel to the tensioning screw 10, and located in the same transverse plane.

    Ainsi la câblette 3, formant dans un plan transversal une boucle qui enlace le câble 6, possède une partie bloquée dans l'encoche 20 par la vis 14 et, au-delà de cette partie, un brin libre 19 qui est ici coudé à angle droit et amené dans une direction parallèle à l'axe du câble 6. Le brin libre 19 de la câblette 3 sert ici d'élément de liaison (en remplacement de la tresse 4 de la première forme de réalisation). Une cosse 18 à sertir ou à visser est prévue à l'extrémité du brin libre 19 de la câblette 3. Comme précédemment, la boucle formée par cette câblette 3 se trouve engagée dans une saignée 21, creusée dans la gaine extérieure isolante 16 du câble 6 et atteignant l'écran de protection 7 de ce câble 6.Thus the cable 3, forming in a transverse plane a loop which embraces the cable 6, has a part locked in the notch 20 by the screw 14 and, beyond this part, a free strand 19 which is here bent at a right angle and brought in a direction parallel to the axis of the cable 6. The free strand 19 of the cable 3 serves here as a connecting element (replacing the braid 4 of the first embodiment). A terminal 18 to be crimped or screwed is provided for the end of the free strand 19 of the cable 3. As before, the loop formed by this cable 3 is engaged in a groove 21, hollowed out in the outer sheath insulating 16 of the cable 6 and reaching the protective screen 7 of this cable 6.

    Les figures 6 et 7 représentent une troisième forme de réalisation, qui est différente des précédentes par la constitution des moyens de mise en tension mécanique contrôlée de la partie de la câblette souple 3 enlaçant le câble 6.Figures 6 and 7 show a third embodiment, which is different from the previous ones by the constitution of the mechanical tensioning means controlled part of the flexible cable 3 embracing the cable 6.

    Le corps 2 du connecteur 1 comporte ici un trou lisse 8A recevant une douille 10A lisse extérieurement et filetée intérieurement, montée tournante mais immobilisée axialement sur le corps 2, la douille 10A comportant à cet effet une gorge annulaire 26 coopérant avec une partie complémentaire appartenant au corps 2. Cette douille 10A est pourvue d'une tête de manoeuvre 12A fusible permettant une mise en tension mécanique contrôlée. The body 2 of the connector 1 here has a smooth hole 8A receiving a socket 10A smooth on the outside and internally threaded, mounted revolving but immobilized axially on the body 2, the sleeve 10A comprising for this purpose an annular groove 26 cooperating with a complementary part belonging to the body 2. This socket 10A is provided with a 12A fuse operating head allowing mechanical tensioning controlled.

    L'extrémité de la câblette 3 est pourvue d'un entraíneur 13a, réalisé sous la forme d'une bague filetée extérieurement, et solidarisée avec cette extrémité. L'entraíneur 13A prend place à l'intérieur de la douille 10A, le filetage extérieur de l'entraíneur 13A étant complémentaire du filetage intérieur de la douille 10A.The end of the cable 3 is provided with a driver 13a, produced in the form an externally threaded ring, and secured to this end. Coach 13A takes place inside the socket 10A, the external thread of the driver 13A being complementary to the internal thread of the socket 10A.

    Avant serrage, comme le montre la figure 6, l'entraíneur 13A se situe vers l'extrémité de la douille 10A éloignée de la tête de manoeuvre 12A. L'actionnement manuel de cette tête de manoeuvre 12A, faisant tourner la douille 10A, provoque son vissage sur l'entraíneur 13A et, par conséquent, une avancée de l'entraíneur 13A en direction de ladite tête de manoeuvre 12A, jusqu'au serrage désiré -voir la figure 7 montrant la configuration obtenue en fin de mise en tension mécanique contrôlée de la câblette 3 après rupture de la tête fusible.Before tightening, as shown in Figure 6, the coach 13A is located towards the end of the socket 10A remote from the operating head 12A. Manual operation of this operating head 12A, rotating the socket 10A, causes it to be screwed onto the coach 13A and, consequently, an advance of the coach 13A in the direction of said operating head 12A, until desired tightening - see Figure 7 showing the configuration obtained at the end of controlled mechanical tensioning of the cable 3 after breaking of the fuse head.

    Cette dernière solution conduit à un encombrement réduit, la douille 10A n'étant pas déplacée axialement par rapport au corps 2 et ne faisant finalement qu'une faible saillie sur le corps 2. En outre, un joint torique anti-vibration 27 peut ici être monté et comprimé entre la tête de manoeuvre 12A de la douille 10A et l'entrée du trou lisse 8A du corps 2.The latter solution leads to a reduced bulk, the socket 10A not being not moved axially with respect to the body 2 and finally making only a slight projection on the body 2. In addition, an anti-vibration O-ring 27 can here be mounted and compressed between the operating head 12A of the socket 10A and the entry of the smooth hole 8A of the body 2.

    Le procédé de mise en oeuvre du dispositif précédemment décrit comprend, dans une première étape, le creusement de la saignée 21 dans la gaine extérieure isolante 16 du câble 6. Comme l'illustre la figure 8, le creusement de cette saignée 21 est réalisable à l'aide d'un matériel constitué par une corde 22, ou autre organe souple filiforme du même genre, dont les deux extrémités sont avantageusement munies de poignées de préhension respectives 23 et 24. La corde 22 est amenée de manière à ceinturer le câble 6, les deux brins libres formés par les régions d'extrémité de cette corde 22 se croisant. Un mouvement de va-et-vient est imprimé à la corde 22, suivant la flèche F, par l'opérateur saisissant cette corde par ses extrémités, notamment par les deux poignées 23 et 24. Ainsi, la corde 22 creuse progressivement, par effet mécanique et/ou thermique, dans la gaine extérieure isolante 16 du câble 6, une saignée 21 qui s'étend sur un arc de cercle inférieur à un tour complet, couvrant par exemple environ 300°, une zone intègre 25 subsistant entre les deux extrémités de la saignée 21 - voir figure 9.The method of implementing the device described above comprises, in a first step, the digging of the groove 21 in the insulating outer sheath 16 of the cable 6. As illustrated in FIG. 8, the digging of this groove 21 can be carried out using of a material constituted by a cord 22, or other flexible filiform member of the same kind, both ends of which are advantageously provided with respective grips 23 and 24. The rope 22 is brought so as to encircle the cable 6, the two free strands formed by the end regions of this intersecting cord 22. A back and forth movement is printed on cord 22, along arrow F, by the operator entering this cord by its ends, in particular by the two handles 23 and 24. Thus, the cord 22 hollow gradually, by mechanical and / or thermal effect, in the insulating outer sheath 16 of the cable 6, a groove 21 which extends over an arc of a circle less than one complete revolution, covering for example around 300 °, an integral zone 25 remaining between the two ends of the groove 21 - see figure 9.

    Une fois la saignée 21 creusée, l'opérateur retire la corde 22 et procède à la mise en place du connecteur 1, en appliquant le corps 2 du connecteur sur la zone 25 et en engageant la câblette 3 dans la saignée 21, pour former une boucle avant de revenir au corps 2 où le blocage de la câblette 3 est effectué au moyen de la vis 14 à tête fusible 15 formant limiteur de couple. Ensuite, il est procédé manuellement à la mise en tension mécanique contrôlée de la boucle sur l'écran 7 par serrage de la vis 10, dont la tête fusible 12 joue également le rôle de limiteur de couple.Once the groove 21 has been dug, the operator removes the cord 22 and proceeds with the setting in place of connector 1, applying body 2 of connector to zone 25 and engaging the cable 3 in the groove 21, to form a loop before returning to the body 2 where the locking of the cable 3 is effected by means of the screw 14 with a fuse head 15 forming torque limiter. Then, there is manual mechanical tensioning controlled loop on the screen 7 by tightening the screw 10, whose fuse head 12 plays also the role of torque limiter.

    Puis, selon le cas, on réalise la liaison électrique avec un élément extérieur soit à l'aide du brin libre 19 de la câblette 3, soit à l'aide de la tresse 4. Then, as the case may be, the electrical connection is made with an external element either at using the free end 19 of the cable 3, or using the braid 4.

    Après immobilisation et mise en tension mécanique contrôlée de la câblette 3, engagée dans la saignée 21, on peut en outre réaliser une étanchéité et une isolation autour du connecteur 1 et du câble 6 dans la région du connecteur, ceci par différents moyens complémentaires tels que : pose d'un ruban autosoudable, mise en place d'une coquille adaptée et remplissage de celle-ci avec une résine isolante, mise en place d'accessoires adaptés avec parties souples (par exemple gomme élastomère), mise en place d'une gaine thermorétractable ou d'une gaine mécanicorétractable.After immobilization and controlled mechanical tensioning of cable 3, engaged in the groove 21, it is further possible to provide sealing and insulation around of connector 1 and cable 6 in the region of the connector, by various means complementary such as: installation of a self-sealing tape, installation of a shell suitable and filling it with an insulating resin, fitting accessories adapted with flexible parts (for example elastomer rubber), fitting of a sheath heat shrinkable or mechanically shrinkable.

    Le dispositif de connexion peut être placé en extrémité de câble, en un point intermédiaire d'un câble sans accessibilité aux extrémités, autour d'un câble accessible seulement sur une longueur faible, ou sur un câble accessible seulement sur un angle réduit. Bien que l'invention soit applicable en particulier à la connexion d'écrans appartenant à des câbles de télécommunication, le dispositif de connexion en question est aussi adaptable aux câbles de transport d'énergie électrique, aux câbles de réseaux vidéo, aux câbles coaxiaux, ainsi qu'aux gaines ou guides isolés, la constitution et la géométrie de ces câbles ou analogues pouvant être diverses. En particulier, le même dispositif de connexion est adaptable, sans modification, à des câbles de divers diamètres, en formant avec la câblette une boucle de plus ou moins grande longueur enlaçant le câble.The connection device can be placed at the end of the cable, at a point through a cable with no accessibility at the ends, around an accessible cable only on a short length, or on an accessible cable only on a reduced angle. Although the invention is applicable in particular to the connection of screens belonging to telecommunication cables, the connection device in question is also adaptable to cables for transporting electrical energy, for video network cables, for coaxial cables, as well as insulated sheaths or guides, the constitution and geometry of these cables or analogs can be various. In particular, the same connection device is adaptable, without modification, to cables of various diameters, forming with the cable a loop of varying length wrapping the cable.

    Claims (9)

    1. Electrical connection device, for protective conducting cable screens, the screen (7) consisting of a metal layer of very small thickness, inserted between the electrical conductor or conductors of the cable (6) and an insulating outer jacket (16) of the cable (6), the device being of the kind comprising a connector (1) having a rigid body (2) capable of bearing on a region (25) of the periphery of the cable (6), and a flexible filiform conducting element (3) provided for encircling the cable (6), means (8 to 12, 14, 15, 20) being provided for securing an end (13) of the flexible conducting element (3) to the body (2) of the connector (1) and for immobilizing, with controlled mechanical tensioning, of the part of this flexible conducting element (3) encircling the cable (6), characterized in that the flexible filiform conducting element is made in the form of a conducting braid or of a flexible cablet (3), forming a loop intented to be positioned in a transverse groove (21), hollowed out in the insulating outer jacket (16) of the cable (6) , over at least a fraction of its circumference, and reaching the screen (7), and that one end (13, 13A) of the flexible filiform conducting element (3) is secured to the body (2) of the connector (1) by means of a threaded controlled-mechanical-tensioning member (10, 10A) through which this end (13) passes axially, and in that the body (2) of the connector (1) includes a housing, such as a channel (9) or notch (20), receiving the strand of the flexible conducting element (3), forming the end of the loop encircling the cable (6), a lock screw (14, 15) being provided for immobilizing this strand of the flexible conducting element (3) in the said housing (9; 20).
    2. Electrical connection device according to Claim 1, characterized in that the threaded controlled-mechanical-tensioning member is an internally threaded bush (10A) mounted so as to rotate, but axially immobilized (at 26) on the body (2) of the connector (1), while the end of the flexible conducting element (3) is provided with an externally threaded driver (13A) interacting with the internal thread of the bush (10A).
    3. Electrical connection device according to Claim 1 or 2, characterized in that the threaded mechanical-tensioning member (10, 10A) and the lock screw (14) are screws or bushes with a shear head (12; 15) permitting control of their tightening torque, and therefore control of the contact force of the said flexible conducting element (3) on the screen (7).
    4. Electrical connection device according to any one of Claims 1 to 3, characterized in that the connector (1) is provided with a conducting braid (4), one end of which is fastened to the body (2) of this connector (1) and which is designed to provide the envisaged electrical bonding, such as earthing of the screen (7) of the cable (6).
    5. Electrical connection device according to any one of Claims 1 to 3, characterized in that the free strand (19) of the flexible filiform conducting element (3) is used to provide directly the envisaged electrical bonding, such as earthing the screen (7) of the cable (6).
    6. Electrical connection device according to Claim 4 or 5, characterized in that the free end of the bonding braid (4) of the flexible filiform element (3) is equipped with a lug (18).
    7. Method of making an electrical connection for conducting cable screens by employing the connection device according to any one of Claims 1 to 6, characterized in that it essentially consists in:
      hollowing out, in the insulating outer jacket (16) of the cable (6), over at least a fraction of its circumference, a groove (21) whose bottom reaches the screen (7), the groove (21) being hollowed out by using a filiform flexible element (22) of the cord kind, surrounding the cable (6) and subjected to a to-and-fro movement (F), forming the groove (21) by a mechanical effect and/or by a thermal effect ;
      engaging the flexible filifom conducting element (3) of the aforementioned device in the groove (21), forming a loop, while the body (2) of the connector (1) is applied on a region (25) of the periphery of the cable (6);
      immobilizing and mechanically tensioning, in a controlled manner, the flexible conducting element (3); and
      making the envisaged electrical bonding between the connector (1) and an external element.
    8. Method of making an electrical connection according to Claim 7, characterized in that the groove (21) is made over a fraction of the complete circumference of the cable (6), so as to leave a part (25) of the outer jacket intact, on which part the body (2) of the connector (1) is applied.
    9. Method of making an electrical connection according to Claim 8, characterized in that the groove (21) is made in the form of a circular arc of approximately 300°.
    EP95420043A 1994-02-24 1995-02-22 Electrical connection device for conductive cable shields and method for its implementation Expired - Lifetime EP0669677B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9402359A FR2716579B1 (en) 1994-02-24 1994-02-24 Electrical connection device for screens of conductive cables, and method for its implementation.
    FR9402359 1994-02-24

    Publications (2)

    Publication Number Publication Date
    EP0669677A1 EP0669677A1 (en) 1995-08-30
    EP0669677B1 true EP0669677B1 (en) 1998-07-08

    Family

    ID=9460565

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP95420043A Expired - Lifetime EP0669677B1 (en) 1994-02-24 1995-02-22 Electrical connection device for conductive cable shields and method for its implementation

    Country Status (9)

    Country Link
    US (1) US5634827A (en)
    EP (1) EP0669677B1 (en)
    JP (1) JPH07263108A (en)
    AT (1) ATE168224T1 (en)
    CA (1) CA2143270C (en)
    DE (1) DE69503274T2 (en)
    ES (1) ES2119340T3 (en)
    FR (1) FR2716579B1 (en)
    ZA (1) ZA951243B (en)

    Families Citing this family (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE29711142U1 (en) * 1997-06-26 1997-08-21 G.A. Kettner Gmbh, 65606 Villmar Device for isolating a cable connection
    US6431885B1 (en) 2000-06-27 2002-08-13 X-Com Systems, Inc. Electrical component grounding device, electrical system grounding and support apparatus, and antenna component grounding system
    GB201102405D0 (en) * 2011-02-11 2011-03-30 Sicame Electrical Dev Ltd Connector of electrical conductors
    WO2013052200A1 (en) 2011-10-07 2013-04-11 Titeflex Corporation Bushings, sealing devices, tubing, and methods of installing tubing
    US9541225B2 (en) 2013-05-09 2017-01-10 Titeflex Corporation Bushings, sealing devices, tubing, and methods of installing tubing
    EP3587884B1 (en) * 2018-06-22 2021-10-27 Crompton Technology Group Limited Assembly comprising a bonding wire and a pipe and method of attaching a bonding wire to a pipe

    Family Cites Families (9)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US1935085A (en) * 1932-11-22 1933-11-14 James E Euwer Ground clamp
    US2913699A (en) * 1955-01-10 1959-11-17 Thomas Associates Electrical bonding clamp
    GB876348A (en) * 1959-02-03 1961-08-30 Ass Elect Ind Improvements in or relating to cable connectors
    GB926677A (en) * 1960-02-12 1963-05-22 Hepworth Iron Co Ltd Improvements in or relating to bonds for electric cables
    US4051323A (en) * 1976-10-14 1977-09-27 Thomas & Betts Corporation Connector for coupling a ground conductor to the shield of a shielded conductor
    US4623204A (en) * 1984-05-17 1986-11-18 Auclair William T Universal ground clamp
    US4875864A (en) * 1989-03-13 1989-10-24 Campbell Marvin J Ground clamp for coaxial cable junction block
    GB2245772B (en) * 1990-07-06 1994-11-23 Niglon Limited Electrical connectors
    US5131856A (en) * 1991-11-15 1992-07-21 Electric Motion Company, Incorporated Universal ground clamp

    Also Published As

    Publication number Publication date
    CA2143270A1 (en) 1995-08-25
    EP0669677A1 (en) 1995-08-30
    DE69503274D1 (en) 1998-08-13
    FR2716579B1 (en) 1996-04-12
    FR2716579A1 (en) 1995-08-25
    DE69503274T2 (en) 1999-05-27
    US5634827A (en) 1997-06-03
    ATE168224T1 (en) 1998-07-15
    ES2119340T3 (en) 1998-10-01
    CA2143270C (en) 2004-02-03
    ZA951243B (en) 1995-10-19
    JPH07263108A (en) 1995-10-13

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