EP0365376A1 - Junction of a cable and an electrode on a laminated panel, in particular a heating panel, by a piercing cable terminal, cable terminal for such a junction and plate consisting of a multiplicity of joined cable terminals - Google Patents

Junction of a cable and an electrode on a laminated panel, in particular a heating panel, by a piercing cable terminal, cable terminal for such a junction and plate consisting of a multiplicity of joined cable terminals Download PDF

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Publication number
EP0365376A1
EP0365376A1 EP89402576A EP89402576A EP0365376A1 EP 0365376 A1 EP0365376 A1 EP 0365376A1 EP 89402576 A EP89402576 A EP 89402576A EP 89402576 A EP89402576 A EP 89402576A EP 0365376 A1 EP0365376 A1 EP 0365376A1
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EP
European Patent Office
Prior art keywords
panel
plate
claws
electrode
cable
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Granted
Application number
EP89402576A
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German (de)
French (fr)
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EP0365376B1 (en
Inventor
Daniel Peyramaure
Michel Peyramaure
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Mecatraction SAS
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Mecatraction SAS
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Publication of EP0365376A1 publication Critical patent/EP0365376A1/en
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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
    • 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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2495—Insulation penetration combined with permanent deformation of the contact member, e.g. crimping

Definitions

  • the invention relates to a junction of a current supply cable to a foil strip electrode of a flexible laminated panel, in particular a heating panel, provided on both of its main faces with sheets. of insulating roofing, the junction comprising a terminal consisting of a part, a socket where the cable is fixed, and a laminar body with at least one plate, generally flat and rectangular, applied to a first face of the panel facing the electrode, at least one element of the body being pressed against the second face of the panel under the wafer by plastic deformation of a region of the body between wafer and element.
  • flexible radiating panels to be included in these ceilings or partitions are used to produce electrically heated ceilings or partitions, obtained by transverse cutting of continuous strips comprising a core or base sheet of woven glass lined a conductive coating consisting of a frit of a mixture of carbon black powders and polytetrafluoroethylene.
  • This ply is provided, on its two edges, with electrodes each formed by a foil strip linked to the conductive coating and sewn onto the base ply.
  • cover sheets of polyethylene polyester composite intimately linked to the base ply by calendering.
  • the cross sections of tape which limit the panels are covered with an insulating lining straddling the two main faces, formed by folding a ribbon of material similar to that of the cover sheets, to ensure the sealing of the panels, avoid their deterioration by penetration of humidity, and electrical leaks in the materials where they are included.
  • the width between electrodes and the surface resistance of the coating are chosen so that, a determined voltage being applied between the electrodes (for example 220 volts), the current per unit of panel length which results from the application of the voltage corresponds to a suitable surface power dissipated, that is to say corresponding to a panel operating temperature suitable for heating the room efficiently and comfortably, and compatible with a satisfactory panel life.
  • the power provided for heating determines a total length of panels to be used.
  • the width of the panels between banks being 0.275 m, the operating voltage 220 volts, and the power per square meter of 200 watts, there will be 55 watts dissipated and 0.25 A per linear meter of panel.
  • crimp type lugs are used, where the contacts are provided by a forging effect of conductive metals crushed against each other. More specifically, use is made of specially adapted lugs of copper metal which consist of a part, a tubular sleeve where the stripped end of the cable is crimped, and a body formed by two rectangular plates, one of which is connects to the socket in the middle of its short side: these plates are combined, on a quarter about the length of their long side, starting from the short side which carries the socket, by a bridge which, at the start, keeps the plates square with the long parallel sides.
  • the faces located inside the square have protruding tubular claws whose height is slightly greater than the thickness of the plates.
  • the free end of the tubular claws has serrations.
  • the terminal fixed to the cable by crimping the sleeve on the stripped end of this cable, is placed in a special clamp; tightening the clamp flaps the two plates towards each other, plastically deforming the bridge by folding parallel to the long sides of the plates.
  • This tightening is carried out with the plates passing on either side of the panel, opposite the electrode, and with the long sides of the plates parallel to the length of the electrode.
  • the claws are arranged on the plates to come opposite each other in this folding movement, with their serrations offset angularly.
  • the claws perforate the cover sheets to sink into the metal of the electrode.
  • the plastic deformation of the bridge ensures the general holding of the terminal, while the tangling of the serrations of claws which bite into the electrode and are crushed irregularly produces an encrustation of the claws in the electrode.
  • the lugs of the state of the art which have just been described, and whose contact reliability is not discussed, have essentially economic disadvantages.
  • Their manufacture requires relatively expensive tools, in particular due to the execution of the claws by drawing the metal of the wafer into die openings, under the action of punches of diameter much smaller than that of the die openings, and whose head is in diamond point to burst the terminal veil by forming the serrations.
  • the clamps for fixing the terminals are specially executed tools whose mode of action is complex.
  • the specialization of lugs and clamps corresponding to the solution of a particular problem is not favorable to mass production, and therefore to lowering cost prices and amortization of manufacturing tools.
  • each connection involves the taking of a terminal, its crimping on a stripped end of cable, then its installation in a position precise in the clamp, and finally the stapling at the appropriate location of the panel.
  • This series of operations is not conducive to quick and efficient work at the same time.
  • the invention proposes the connection of a current supply cable to an electrode in foil strip of a flexible laminated panel, in particular a heating panel, provided on both of its main faces with insulating cover sheets, the junction comprising a terminal made up of a part, a socket where the cable is fixed and a laminar body with at least one plate, generally flat and rectangular, applied to a first face of the panel facing the electrode and provided with claws perforating the cover sheet and penetrating into the electrode, at least one element of the body being pressed against the second face of the panel under the plate by plastic deformation of an area of the body between plate and element, characterized in that the terminal body only comprises a plate with a plurality of claws, each in the form of an isosceles triangle and executed by punctured along the two equal sides of the triangle forming an acute angle between them, and angled at an angle along the third side, the claws completely crossing the panel from the first face to the second and
  • the structure of the terminal which makes it possible to perform the junction is simpler than that of the lugs in the state of the art, and that its manufacture requires tools. more simple and rustic.
  • the positioning clamp will have a simpler structure and operation, which more closely resemble a stapling tool with a hammer which drives out the parts of the grif fes which have passed through the panel, in profiled grooves d 'an anvil, to fold them towards the plate. This will also be discussed below.
  • the triangular shape of the claws which facilitates the perforation of the panel, ensures that the deeper the grif fe is pushed beyond the electrode, the more it forces laterally on the foil.
  • the residual elasticity of the parts in contact, beyond plastic deformation acts to improve contact, instead of causing a slight shrinkage in the direction of deformation, sources of somewhat random contact.
  • the folded portions of the claws are inlaid at the end in the cover sheet of the second face of the panel, which is obtained by an appropriate profile of the anvil grooves.
  • a certain number of accessory arrangements are preferred, because they improve the general result: thus the angle at the apex between the equal sides of the triangle is between 20 ° and 40 °, which represents a compromise between the lengthening of the claws, which ensures good development of the end part under pressure effectively against the second cover sheet, and the rigidity of the claws for the perforation of the panels. Likewise, by orienting the claw punctures in parallel with one another, their deformation in folding is made easier.
  • the height of the triangles must be at least double the cumulative thickness of the plate and of the panel so that the free end of the claws can be folded sufficiently towards the plate and generate a suitable holding force, taking into account the deformations in the bending. It is preferable that the claw height is 4 to 6 times greater than the thickness of the pad, and in this range, the claws can be around 4 mm high, for a pad thickness of 0, 8 mm. For a good holding of the plate on the panel, a plate with six grifes, arranged in a staggered pattern, seems appropriate by giving a correct holding while the risk of tearing from the perforations caused by the claws is minimized.
  • the The invention also provides a terminal intended for the connection of a current supply cable to a foil strip electrode of a flexible laminated panel, in particular heating panel provided, on both of its main faces, with insulating cover sheets, the terminal comprising, in one piece, a socket intended for fixing the cable, a laminar body with at least one plate generally flat and rectangular provided with claws capable of perforating a cover sheet and penetrating into the underlying electrode by applying the plate on a first face of the panel opposite the electrode, and at least one element capable of being pressed against the second face of the panel under the plastic deformation plate of an
  • the simple and generally planar shape of the terminal makes it easy to execute the terminal on a consecutive tool from an elongated strip.
  • the multiplicity of lugs linked by frangible bridges can then form a bar suitable for loading a repetitive stapling pliers.
  • the use of such a tool on a construction site is likely to provide substantial time savings for the wiring of heating panels.
  • a heating panel 1 as a whole which in itself is known and does not form part of the invention, comprises a conductive sheet 10, continuous, bordered on its banks by two electrodes 11 and 11 ′, in a copper foil strip.
  • the sheet 10 consists of a glass fabric which has been coated with a suspension of a mixture of carbon black powders and polytetrafluoroethylene; the foil strips 11 and 11 ′ were fixed to the sheet 10 by longitudinal seams, and the powder mixture was sintered under conditions conventional for polytetrafluoroethylene.
  • cover sheets 12 and 13, made of polyethylene polyester composite, projecting laterally from the sheet 10 were placed on either side of this sheet 10, and fixed by calendering. Panels are cut from the continuous strip by cross sections spaced apart by a predetermined length, and the panel edges are covered with a ribbon of polyethylene polyester composite folded over the two faces of the panel and heat fixed.
  • Lugs 2 and 2 ′ fixed to the end of cables 3 and 3 ′ respectively are applied to the face of the panel 1 where the cover sheet 12 is fixed, opposite the electrodes 11 and 11 ′, and have claws capable of '' Establish contact with these electrodes respectively, by perforating the cover sheet 12.
  • the terminal 2 as a whole comprises a tubular sleeve 20 formed by rolling and a body 21 consisting of a rectangular plate.
  • the plate or body 21 and the sleeve 20 are in one piece and cut from a copper foil.
  • six claws 22 From the face of the plate 21 protrude, opposite the rolling of the sleeve 20, six claws 22, only one of which is provided with references for the clarity of the drawing, arranged in a staggered pattern, including the basic mesh has four locations at the vertices of a rectangle and one location at the intersection of the two diagonals.
  • the sixth claw is in the center of a fictitious mesh, offset by a side length compared to the real mesh.
  • the claws 22 are in the form of isosceles triangles, with two equal sides 23 and 24, free, which form between them an angle at the acute apex, which is here about 30 °, and a third side 25 where the claw takes root in the wafer 21.
  • These claws 22 are executed by puncturing the wafer 21 along the two equal sides of the triangle, and bending the claws at right angles with a fold on the third side 25.
  • the claw 22 thus leaves in the wafer a imprint or isosceles triangle opening 26. As can be seen, the openings 26 are all parallel, and the bisectors of the angle at the apex between the equal sides are directed parallel to the long side of the plate 21.
  • the plate 21 By closing the clamp, the plate 21 is pushed by a first jaw or hammer in the direction of a second jaw, or anvil which bears under the panel 1 in front of the hammer; the claws 22 pass through the entire thickness of the panel 1, perforating the cover sheet 12, the electrode 11, the underlying ply 10, and the cover sheet 13 to emerge from the second face of the panel 1.
  • the anvil of the clamp has oblong grooves, with a rounded concave longitudinal profile, these grooves having a first end which receives the claw tip 22, and extending, parallel to the height of the openings 26, up to a second end, in the direction opposite openings 26.
  • the claws deform plastically, to take the form shown diagrammatically in FIG. 4, the nature of the metal constituting the terminal and the rate of deformation imposed being such that the elastic limit is greatly exceeded.
  • the claw 22 comprises, from the original bending 25, a first part 22 a normal to the plate 21, which extends through the panel 1 beyond the second face, then a bending 27 on a folding angle of at least 90 °, the bending fold being parallel to that of the bending 25 along the third side of the triangle, and finally a tip portion 22 b strongly pressed against the underside of the panel, becoming more or less in cover sheet 13.
  • the claw 22 must be long enough for the tip portion 22 b to bear against the cover sheet at a non-zero distance from the arch 27, so that the clamping between plate 21 and end of claw 22 b is effective, and that the first part 22 a is not deformed by enlarging, in the longitudinal direction, its passage in the electrode 11, which would be detrimental to the contact. Consequently the length of the claws must be at least equal to twice the cumulative thickness of the plate 21 and of the panel 1, or, if the thickness of the panel is significantly less than that of the plate, greater than twice the thickness of the plate 21, the height of claw being counted from the face of the plate on which it projects.
  • the thickness of the plate determines the minimum bending radius of the grid, counted on the neutral fiber.
  • the length of the claw 22, projecting from the wafer 21 will be taken between 4 and 6 times the thickness of the wafer.
  • the plate has a thickness of 0.8 mm, and the claws 22 are approximately 4 mm high.
  • Another important parameter of the claw 22 is the angle at the top of the isosceles triangle which delimits the claw. With a small angle, the perforation of the panel is facilitated, and the claw can have a relatively large height without occupying a large width of the plate 21. In return the risks of buckling of the claw under the perforation effect are increased.
  • a large angle at the top in addition to reducing the claw height and the perforation capacity, makes it more difficult to execute the second arch 27, under the panel, by exaggerating the claw section at the arching location.
  • the angle at the top will therefore advantageously be between 20 ° and 40 °, the angle of 30 ° used for the example described here being considered as a typical value.
  • the triangular shape of the claws 22 not only solves in a simple manner the execution of a point suitable for perforation, but promotes the progressive deformation of the claw from the point towards the root, the section of the claw, and in parallel the effort required for increasing deformation from tip to root.
  • the passage of the claw 22 through the electrode 11 sees its width increase with the depression of the claw, and the lateral flanks 23 and 24 increase their force against the corresponding side of the passage in the electrode 11, to ensure reliable electrical contact.
  • the tool for cutting and bending the terminal 2 can be relatively simple and inexpensive, the design of the contact of the terminal 2 with the electrode 1, and of the fixing by pressing of the claw tip against the second face of the panel 2 allowing wide tolerances.
  • the sides 23 and 24 of the claws 22 deviate somewhat from the geometric planes defined by the lines constituting equal sides of isosceles triangle and the normals to the faces coming from the main faces of the wafer.
  • What is essential for the claws 22 is that the projection of the points on the plate plane passes substantially through the middle of the third side 25, and that the width of the claw increases monotonously from the point to the root.
  • FIG. 5 represents a bar 5 as a whole comprising a multiplicity of terminals 51-59 of general shape corresponding to the terminal 2 of FIG. 2, with in particular a socket 201 to 209 and a plate 211 to 219 respectively; the plates have claws 221 to 229, only the claw 221 of the terminal 51 bearing a reference number, so as not to unnecessarily overload the drawing.
  • Each plate with the exception of the end plates, here 211 and 219, is linked to the plates which precede and follow them in multiplicity by frangible bridges 60 a and 60 b .
  • This arrangement makes it possible to provide the installation clamp with a magazine which will receive the bar, from which the positioning position of the clamp will be supplied. It is clear that the formation of junctions between cables and panels is thus made easier and faster.
  • the bars are executed on a tool in succession, with a succession of positions where the puncture-bending of the claws will be carried out, the clipping of the terminal by sparing the bridges and the rolling of the sockets, starting from a strip blank.
  • the arrangement of such a tool in succession is the competence of a toolmaker.
  • Figure 6 shows a variant of strip 5, where the lugs 51-54 are aligned longitudinally.
  • Frangible bridges are reduced to the only bridge 60 c , constituted by a lug which connects the middle of the frontal side opposite to the socket 201, 202, 203, 204 of each terminal 51, 52, 53, 54 ... to the socket 202 , 203, 204 of the terminal 52, 53, 54 which immediately follows it in multiplicity 5.
  • This arrangement symmetrical with respect to the longitudinal axis of the bar, which results in a longer bar length for the same number of terminals, allows to better balance each of the cutting and bending tool positions. in addition the shearing tool used to separate the terminals can be simpler and more robust.

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  • Multi-Conductor Connections (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

The cable terminal (2) is intended to connect to a current-supply cable a foil strip electrode of a flexible heating panel which presents insulating covering sheets on its two main faces. The cable terminal (2) comprises, in one piece a socket (20) for setting the cable, and a slab (21) provided with six claws (22) obtained by puncturing, along two equal sides (23,24) of an isosceles triangle with a vertex angle close to 30 DEG and bending at right angles along the third side (25) of the triangle. For contact with the electrode, the slab (21) is pressed, claws (22) first, on to the covering sheet of the upper face of the panel opposite the electrode, in such a way that the claws perforate the superimposed layers of the panel, and traverse the electrode until the slab (21) rests on the panel. The claws (22) are folded back by bending parallel to the bend (25) under the panel, in a direction opposite to the punctured aperture (26), in such a way that their points are pressed against the panel over a substantial portion of their length. <IMAGE>

Description

L'invention a trait à une jonction d'un câble d'amenée de courant à une électrode en bande de clinquant d'un panneau laminé souple, notamment panneau chauffant, muni sur l'une et l'autre de ses faces principales de feuilles de couverture isolantes, la jonction comprenant une cosse constituée, d'une pièce, d'une douille où est fixé le câble, et d'un corps laminaire avec au moins une plaquette, généralement plane et rectangulaire, appliquée sur une première face du panneau en regard de l'électrode, au moins un élément du corps étant pressé contre la seconde face du panneau sous la plaquette par déformation plastique d'une zone du corps entre plaquette et élément.The invention relates to a junction of a current supply cable to a foil strip electrode of a flexible laminated panel, in particular a heating panel, provided on both of its main faces with sheets. of insulating roofing, the junction comprising a terminal consisting of a part, a socket where the cable is fixed, and a laminar body with at least one plate, generally flat and rectangular, applied to a first face of the panel facing the electrode, at least one element of the body being pressed against the second face of the panel under the wafer by plastic deformation of a region of the body between wafer and element.

Dans l'industrie du bâtiment, on utilise, pour réaliser des plafonds ou cloisonnements à chauffage électrique, des panneaux rayonnants souples à inclure dans ces plafonds ou cloisonnements, obtenus par tronçonnage transversal de bandes continues comportant une ame ou nappe de base en verre tissé garni d'un revêtement conducteur constitué d'une fritte d'un mélange de poudres de noir de carbone et de polytétrafluoréthylène. Cette nappe est munie, sur ses deux rives, d'électrodes formées chacune d'une bande de clinquant liée au revêtement conducteur et cousue sur la nappe de base. Sur les deux faces principales de la bande continue sont rapportées deux feuilles de couverture en composite polyéthylène polyester, liées intimement à la nappe de base par calandrage. Les sections transversales de bande qui limitent les panneaux sont recouvertes d'une garniture isolante à cheval sur les deux faces principales, constituée par pliage d'un ruban de matière analogue à celle des feuilles de couverture, pour assurer l'étanchéité des panneaux, éviter leur détérioration par pénétration d'humidité, et les fuites électriques dans les matériaux où ils sont inclus.In the building industry, flexible radiating panels to be included in these ceilings or partitions are used to produce electrically heated ceilings or partitions, obtained by transverse cutting of continuous strips comprising a core or base sheet of woven glass lined a conductive coating consisting of a frit of a mixture of carbon black powders and polytetrafluoroethylene. This ply is provided, on its two edges, with electrodes each formed by a foil strip linked to the conductive coating and sewn onto the base ply. On the two main faces of the continuous strip are attached two cover sheets of polyethylene polyester composite, intimately linked to the base ply by calendering. The cross sections of tape which limit the panels are covered with an insulating lining straddling the two main faces, formed by folding a ribbon of material similar to that of the cover sheets, to ensure the sealing of the panels, avoid their deterioration by penetration of humidity, and electrical leaks in the materials where they are included.

La largeur entre électrodes et la résistance superficielle du revêtement sont choisies pour que, une tension déterminée étant appliquée entre les électrodes (par exemple 220 volts), le courant par unité de longueur de panneau qui résulte de l'application de la tension corresponde à une puissance surfacique dissipée convenable, c'est-à-dire correspondant à une température de régime du panneau appropriée au chauffage du local efficace et confortable, et compatible avec une durée de vie du panneau satisfaisante. La puissance prévue pour le chauffage détermine un total de longueur de panneaux à utiliser. Pour prendre un exemple, la largeur des panneaux entre rives étant de 0,275 m, la tension de service 220 volts, et la puissance au mètre carré de 200 watts, on comptera 55 watts dissipés et 0,25 A par mètre linéaire de panneau.The width between electrodes and the surface resistance of the coating are chosen so that, a determined voltage being applied between the electrodes (for example 220 volts), the current per unit of panel length which results from the application of the voltage corresponds to a suitable surface power dissipated, that is to say corresponding to a panel operating temperature suitable for heating the room efficiently and comfortably, and compatible with a satisfactory panel life. The power provided for heating determines a total length of panels to be used. To take an example, the width of the panels between banks being 0.275 m, the operating voltage 220 volts, and the power per square meter of 200 watts, there will be 55 watts dissipated and 0.25 A per linear meter of panel.

Avec le mode de réalisation de panneaux scellés imposés par les conditions d'utilisation, l'accès aux électrodes pour y fixer des câbles d'amenée de courant n'est possible qu'en traversant les feuilles de couverture. La liaison des câbles aux électrodes par soudure tendre est pratiquement inacceptable en raison des risques de détérioration du panneau sous l'effet du chauffage au point de connexion du câble, et du raidissement du câble par prise en bloc des brins par le métal d'apport.With the embodiment of sealed panels imposed by the conditions of use, access to the electrodes for fixing current supply cables is only possible by crossing the cover sheets. The connection of the cables to the electrodes by soft soldering is practically unacceptable because of the risks of deterioration of the panel under the effect of the heating at the point of connection of the cable, and of the stiffening of the cable by block taking of the strands by the filler metal .

Couramment, on utilise des cosses du genre a sertissage, où les contacts sont assurés par un effet de forgeage de métaux conducteurs écrasés l'un contre l'autre. Plus précisément, on utilise des cosses spécialement adaptées en métal cuivreux qui se composent, d'une pièce, d'une douille tubulaire où est sertie l'extrémité dénudée du câble, et d'un corps formé de deux plaquettes rectangulaires, dont une se relie à la douille au milieu de son petit côté: ces plaquettes sont réunies, sur un quart environ de la longueur de leur grand côté, en partant du petit côté qui porte la douille, par un pont qui, au départ, maintient les plaquettes à l'équerre avec les grands côtés parallèles. Les faces situées à l'intérieur de l'équerre portent des griffes tubulaires saillantes dont la hauteur est un peu supérieure à l'épaisseur des plaquettes. L'extrémité libre des griffes tubulaires comporte des dentelures.Commonly, crimp type lugs are used, where the contacts are provided by a forging effect of conductive metals crushed against each other. More specifically, use is made of specially adapted lugs of copper metal which consist of a part, a tubular sleeve where the stripped end of the cable is crimped, and a body formed by two rectangular plates, one of which is connects to the socket in the middle of its short side: these plates are combined, on a quarter about the length of their long side, starting from the short side which carries the socket, by a bridge which, at the start, keeps the plates square with the long parallel sides. The faces located inside the square have protruding tubular claws whose height is slightly greater than the thickness of the plates. The free end of the tubular claws has serrations.

Pour exécuter le contact avec l'électrode, la cosse, fixée au câble par sertissage de la douille sur l'extrémité dénudée de ce câble, est placée dans une pince spéciale; le serrage de la pince rabat les deux plaquettes l'une vers l'autre, en déformant plastiquement le pont par pliage parallèle aux grands côtés des plaquettes. On effectue ce serrage avec les plaquettes passant de part et d'autre du panneau, en face de l'électrode, et avec les grands côtés des plaquettes parallèles à la longueur de l'électrode. Les griffes sont disposées sur les plaquettes pour venir en regard les unes des autres dans ce mouvement de pliage, avec leurs dentelures décalées angulairement.To make contact with the electrode, the terminal, fixed to the cable by crimping the sleeve on the stripped end of this cable, is placed in a special clamp; tightening the clamp flaps the two plates towards each other, plastically deforming the bridge by folding parallel to the long sides of the plates. This tightening is carried out with the plates passing on either side of the panel, opposite the electrode, and with the long sides of the plates parallel to the length of the electrode. The claws are arranged on the plates to come opposite each other in this folding movement, with their serrations offset angularly.

Par serrage à fond de la pince, les griffes perforent les feuilles de couverture pour s'enfoncer dans le métal de l'électrode. La déformation plastique du pont assure la tenue générale de la cosse, tandis que l'enchevêtrement des dentelures de griffes qui mordent dans l'électrode et s'écrasent de façon irrégulière produit une incrustation des griffes dans l'électrode.By tightening the pliers all the way, the claws perforate the cover sheets to sink into the metal of the electrode. The plastic deformation of the bridge ensures the general holding of the terminal, while the tangling of the serrations of claws which bite into the electrode and are crushed irregularly produces an encrustation of the claws in the electrode.

Bien entendu, après fixation de l'électrode, toutes les parties métalliques restées à nu sont recouvertes d'isolant, de façon étanche. On évite ainsi, tant des détériorations du panneau par l'humidité passant par les blessures infligées au panneau par les griffes, que des fuites électriques à partir de conducteurs à nu dans les plafonds et cloisonnements.Of course, after fixing the electrode, all the metal parts which have remained bare are covered with insulation, in a leaktight manner. This avoids both deterioration of the panel by humidity passing through the injuries inflicted on the panel by the claws, as well as electrical leaks from bare conductors in the ceilings and partitions.

Les cosses de l'état de la technique que l'on vient de décrire, et dont la fiabilité de contact n'est pas discutée, présentent des inconvénients d'ordre essentiellement économique. Leur fabrication nécessite un outillage relativement coûteux, notamment en raison de l'exécution des griffes par étirage du métal de plaquette dans des orifices de matrices, sous l'action de poinçons de diamètre nettement inférieur à celui des orifices de matrices, et dont la tête est en pointe de diamant pour crever le voile terminal en formant les dentelures. Les pinces de fixation des cosses sont des outils exécutés spécialement dont le mode d'action est complexe. La spécialisation des cosses et des pinces correspondantes à la solution d'un problème particulier n'est pas favorable à des fabrications de grande série, et donc à l'abaissement des prix de revient et amortissement des outillages de fabrication.The lugs of the state of the art which have just been described, and whose contact reliability is not discussed, have essentially economic disadvantages. Their manufacture requires relatively expensive tools, in particular due to the execution of the claws by drawing the metal of the wafer into die openings, under the action of punches of diameter much smaller than that of the die openings, and whose head is in diamond point to burst the terminal veil by forming the serrations. The clamps for fixing the terminals are specially executed tools whose mode of action is complex. The specialization of lugs and clamps corresponding to the solution of a particular problem is not favorable to mass production, and therefore to lowering cost prices and amortization of manufacturing tools.

De plus, pour l'exécution sur chantier de plafonds et cloisonnements chauffants, les cosses sont présentées en vrac, et chaque connexion implique la prise d'une cosse, son sertissage sur une extrémité dénudée de câble, puis sa mise en place dans une position précise dans la pince, et enfin l'agrafage à l'emplacement approprié du panneau. Cette série d'opérations n'est pas propice à un travail rapide et efficace à la fois.In addition, for the execution on site of heated ceilings and partitions, the terminals are presented in bulk, and each connection involves the taking of a terminal, its crimping on a stripped end of cable, then its installation in a position precise in the clamp, and finally the stapling at the appropriate location of the panel. This series of operations is not conducive to quick and efficient work at the same time.

Pour pallier au moins les inconvénients principaux rappelés ci-dessus des cosses de l'état de la technique, l'invention propose la jonction d'un câble d'amenée de courant à une électrode en bande de clinquant d'un panneau laminé souple, notamment panneau chauffant, muni sur l'une et l'autre de ses faces principales de feuilles de couverture isolantes, la jonction comprenant une cosse constituée, d'une pièce, d'une douille où est fixé le câble et d'un corps laminaire avec au moins une plaquette, généralement plane et rectangulaire, appliquée sur une première face du panneau en regard de l'électrode et munie de griffes perforant la feuille de couverture et pénétrant dans l'électrode, au moins un élément du corps étant pressé contre la seconde face du panneau sous la plaquette par déformation plastique d'une zone du corps entre plaquette et élément, caractérisée en ce que le corps de cosse comprend uniquement une plaquette avec une pluralité de griffes, chacune en forme de triangle isocèle et exécutée par crevé suivant les deux côtés égaux du triangle formant entre eux un angle aigu, et cambrage à l'équerre suivant le troisième côté, les griffes traversant entièrement le panneau de la première face à la seconde et étant rabattues en sens opposé des crevés suivant un cambrage parallèle au troisième côté du triangle, les parties rabattues occupant une part substantielle de la hauteur du triangle et constituant lesdits éléments de corps pressés contre la seconde face.To at least overcome the main drawbacks mentioned above of the terminals of the prior art, the invention proposes the connection of a current supply cable to an electrode in foil strip of a flexible laminated panel, in particular a heating panel, provided on both of its main faces with insulating cover sheets, the junction comprising a terminal made up of a part, a socket where the cable is fixed and a laminar body with at least one plate, generally flat and rectangular, applied to a first face of the panel facing the electrode and provided with claws perforating the cover sheet and penetrating into the electrode, at least one element of the body being pressed against the second face of the panel under the plate by plastic deformation of an area of the body between plate and element, characterized in that the terminal body only comprises a plate with a plurality of claws, each in the form of an isosceles triangle and executed by punctured along the two equal sides of the triangle forming an acute angle between them, and angled at an angle along the third side, the claws completely crossing the panel from the first face to the second and being folded in the opposite direction from the punctured according to a camber parallel to the third side of the triangle, the folded parts occupying a substantial part of the height of the triangle and constituting said body elements pressed against the second face.

On comprendra, et cet aspect sera développé dans la description détaillée qui suivra, que la structure de la cosse qui permet d'effectuer la jonction est plus simple que celle des cosses à l'état de la technique, et que sa fabrication nécessite des outillages plus simples et rustiques. De même, la pince de mise en place possèdera une structure et un fonctionnement plus simples, qui se rapprochent plus d'un outil d'agrafage avec un marteau qui chasse les parties des grif fes qui ont traversé le panneau, dans des rainures profilées d'une enclume, pour les rabattre vers la plaquette. Ceci également sera commenté plus loin.It will be understood, and this aspect will be developed in the detailed description which follows, that the structure of the terminal which makes it possible to perform the junction is simpler than that of the lugs in the state of the art, and that its manufacture requires tools. more simple and rustic. Likewise, the positioning clamp will have a simpler structure and operation, which more closely resemble a stapling tool with a hammer which drives out the parts of the grif fes which have passed through the panel, in profiled grooves d 'an anvil, to fold them towards the plate. This will also be discussed below.

Enfin, la forme triangulaire des griffes, qui facilite la perforation du panneau, assure que, plus la grif fe est enfoncée profondément au-delà de l'électrode, plus elle force latéralement sur le clinquant. L'élasticité résiduelle des pièces en contact, au-delà des déformations plastiques, agit pour améliorer le contact, au lieu de provoquer un léger retrait dans la direction de déformations, sources de contacts quelque peu aléatoires.Finally, the triangular shape of the claws, which facilitates the perforation of the panel, ensures that the deeper the grif fe is pushed beyond the electrode, the more it forces laterally on the foil. The residual elasticity of the parts in contact, beyond plastic deformation, acts to improve contact, instead of causing a slight shrinkage in the direction of deformation, sources of somewhat random contact.

De préférence, les parties rabattues des griffes sont incrustées en extrémité dans la feuille de couverture de la seconde face du panneau, ce qui est obtenu par un profil approprié des rainures d'enclume.Preferably, the folded portions of the claws are inlaid at the end in the cover sheet of the second face of the panel, which is obtained by an appropriate profile of the anvil grooves.

Un certain nombre de dispositions accessoires sont préférées, car elles améliorent le résultat général: ainsi l'angle au sommet entre les côtés égaux du triangle est compris entre 20° et 40°, ce qui représente un compromis entre l'allongement des griffes, qui assure un bon développement de la partie d'extrémité en pression efficacement contre la seconde feuille de couverture, et la rigidité des griffes en vue de la perforation des panneaux. De même, en orientant parallèlement entre eux les crevés de griffe, on rend plus aisée leur déformation en rabattement.A certain number of accessory arrangements are preferred, because they improve the general result: thus the angle at the apex between the equal sides of the triangle is between 20 ° and 40 °, which represents a compromise between the lengthening of the claws, which ensures good development of the end part under pressure effectively against the second cover sheet, and the rigidity of the claws for the perforation of the panels. Likewise, by orienting the claw punctures in parallel with one another, their deformation in folding is made easier.

La hauteur des triangles doit être au moins double de l'épaisseur cumulée de la plaquette et du panneau pour que l'extrémité libre des griffes puisse être rabattue suffisamment vers la plaquette et engendrer une force de tenue convenable, compte tenu des déformations au cambrage. Il est préférable que la hauteur de griffe soit de 4 à 6 fois plus grande que l'épaisseur de plaquette, et dans cette fourchette, les griffes peuvent avoir de l'ordre de 4 mm de haut, pour une épaisseur de plaquette de 0,8 mm. Pour une bonne tenue de la plaquette sur le panneau, une plaquette à six grif fes, disposée suivant un motif en quinconce, paraît appropriée en donnant une tenue correcte tandis que le risque de déchirements partant des perforations causées par les griffes est minimisé.The height of the triangles must be at least double the cumulative thickness of the plate and of the panel so that the free end of the claws can be folded sufficiently towards the plate and generate a suitable holding force, taking into account the deformations in the bending. It is preferable that the claw height is 4 to 6 times greater than the thickness of the pad, and in this range, the claws can be around 4 mm high, for a pad thickness of 0, 8 mm. For a good holding of the plate on the panel, a plate with six grifes, arranged in a staggered pattern, seems appropriate by giving a correct holding while the risk of tearing from the perforations caused by the claws is minimized.

Comme le faciès des griffes et, dans une certaine mesure, leurs propriétés métallurgiques avant leur mise en place pour exécuter les jonctions sont modifiées de façon notable au cours de la mise en place, en raison de l'importance des déformations plastiques apportées par cette mise en place, et comme la forme finale de la cosse dans la jonction ne permet pas de remonter sans ambiguïté à la forme initiale alors que, pratiquement, l'exécution fiable et simple de la jonction découle de la forme initiale de la cosse, l'invention propose également une cosse destinée à la jonction d'un câble d'amenée du courant à une électrode en bande de clinquant d'un panneau laminé souple, notamment panneau chauffant muni, sur l'une et l'autre de ses faces principales, de feuilles de couverture isolantes, la cosse comprenant, d'une pièce, une douille destinée à la fixation du câble, un corps laminaire avec au moins une plaquette généralement plane et rectangulaire munie de griffes aptes à perforer une feuille de couverture et pénétrer dans l'électrode sous-jacente par application de la plaquette sur une première face du panneau en regard de l'électrode, et au moins un élément apte à être pressé contre la seconde face du panneau sous la plaquette de déformation plastique d'une zone du corps intermédiaire entre la plaquette et l'élément, caractérisée en ce que le corps est constitué uniquement d'une plaquette avec une pluralité de griffes, chacune en forme de triangle isocèle et exécutée par crevé de la plaquette suivant les deux côtés égaux formant entre eux un angle aigu et cambrage à l'équerre suivant un troisième côté, ces griffes présentant une hauteur, en saillie de la plaquette, supérieure au double de l'épaisseur de celle-ci, et une capacité de déformation plastique en cambrage dans une direction opposée à celle du crevé suffisante pour venir se presser contre la plaquette au moins par leur extrémité.Like the facies of the claws and, to a certain extent, their metallurgical properties before their installation to execute the junctions are modified in a notable way during the installation, due to the importance of the plastic deformations brought by this installation. in place, and as the final shape of the terminal in the junction does not allow to go up without ambiguity to the initial form whereas, practically, the reliable and simple execution of the junction follows from the initial form of the terminal, the The invention also provides a terminal intended for the connection of a current supply cable to a foil strip electrode of a flexible laminated panel, in particular heating panel provided, on both of its main faces, with insulating cover sheets, the terminal comprising, in one piece, a socket intended for fixing the cable, a laminar body with at least one plate generally flat and rectangular provided with claws capable of perforating a cover sheet and penetrating into the underlying electrode by applying the plate on a first face of the panel opposite the electrode, and at least one element capable of being pressed against the second face of the panel under the plastic deformation plate of an area of the intermediate body between the plate and the element, characterized in that the body consists only of a plate with a plurality of claws, each in the shape of a triangle isosceles and executed by puncturing the plate along the two equal sides forming an acute angle between them and bending at right angles along a third side, these claws having a height, projecting from the plate, greater than twice the thickness of the latter, and a capacity for plastic deformation in bending in a direction opposite to that of the puncture sufficient to come to press against the plate at least by their end .

Par ailleurs, la forme simple et généralement plane de la cosse rend aisée l'exécution de la cosse sur un outil à suite à partir d'une bande allongée. La multiplicité de cosses liées par des ponts frangibles peut alors former une barrette propre au chargement d'une pince d'agrafage à répétition. L'usage d'un tel outil sur un chantier de construction est de nature à procurer des gains de temps substantiels pour le câblage de panneaux chauffants.Furthermore, the simple and generally planar shape of the terminal makes it easy to execute the terminal on a consecutive tool from an elongated strip. The multiplicity of lugs linked by frangible bridges can then form a bar suitable for loading a repetitive stapling pliers. The use of such a tool on a construction site is likely to provide substantial time savings for the wiring of heating panels.

Les caractéristiques et avantages de l'invention seront plus apparents à la lumière de la description qui va suivre, à titre d'exemple, en référence aux dessins annexés dans lesquels:

  • - la figure 1 est une perspective générale d'un panneau avec des jonctions selon l'invention;
  • - la figure 2 est une représentation perspective d'une cosse utilisée pour la jonction selon la vue II-II de la figure 1;
  • - la figure 3 est une coupe d'un panneau chauffant suivant le plan III-III de la figure 1;
  • - la figure 4 est une coupe agrandie d'une jonction selon l'invention;
  • - la figure 5 est une barrette composée d'une multiplicité de cosses selon la figure 2, liées ensemble;
  • - la figure 6 est une variante de barrette composée d'une multiplicité de cosses alignées longitudinalement.
The characteristics and advantages of the invention will become more apparent in the light of the description which follows, by way of example, with reference to the appended drawings in which:
  • - Figure 1 is a general perspective of a panel with junctions according to the invention;
  • - Figure 2 is a perspective representation a terminal used for the junction according to view II-II of Figure 1;
  • - Figure 3 is a section of a heating panel along the plane III-III of Figure 1;
  • - Figure 4 is an enlarged section of a junction according to the invention;
  • - Figure 5 is a bar composed of a multiplicity of lugs according to Figure 2, linked together;
  • - Figure 6 is a variant of a strip composed of a multiplicity of lugs aligned longitudinally.

Comme on le voit sur les figures 1 et 3, un panneau chauffant 1 dans son ensemble, qui en soi est connu et ne fait pas partie de l'invention, comprend une nappe conductrice 10, continue, bordée sur ses rives de deux électrodes 11 et 11′, en bande de clinquant de cuivre. La nappe 10 est constituée d'un tissu de verre qui a été enduit d'une suspension d'un mélange de poudres de noir de carbone et de polytétrafluoréthylène ; les bandes de clinquant 11 et 11′ ont été fixées sur la nappe 10 par des coutures longitudinales, et le mélange de poudres a été fritté dans des conditions classiques pour le polytétrafluoréthylène. Après cela deux feuilles de couverture 12 et 13, en composite polyéthylène polyester, débordant latéralement la nappe 10, ont été disposées de part et d'autre de cette nappe 10, et fixées par calandrage. Des panneaux sont découpés dans la bande continue par sections transversales distante d'une longueur déterminée, et les tranches de panneau garnies d'un ruban 15 de composite polyéthylène polyester rabattu sur les deux faces du panneau et fixé à chaud.As seen in Figures 1 and 3, a heating panel 1 as a whole, which in itself is known and does not form part of the invention, comprises a conductive sheet 10, continuous, bordered on its banks by two electrodes 11 and 11 ′, in a copper foil strip. The sheet 10 consists of a glass fabric which has been coated with a suspension of a mixture of carbon black powders and polytetrafluoroethylene; the foil strips 11 and 11 ′ were fixed to the sheet 10 by longitudinal seams, and the powder mixture was sintered under conditions conventional for polytetrafluoroethylene. After that two cover sheets 12 and 13, made of polyethylene polyester composite, projecting laterally from the sheet 10, were placed on either side of this sheet 10, and fixed by calendering. Panels are cut from the continuous strip by cross sections spaced apart by a predetermined length, and the panel edges are covered with a ribbon of polyethylene polyester composite folded over the two faces of the panel and heat fixed.

Des cosses 2 et 2′ fixées à l'extrémité de câbles 3 et 3′ respectivement sont appliquées sur la face du panneau 1 où est fixée la feuille de couverture 12, en regard des électrodes 11 et 11′, et présentent des griffes capables d'établir le contact avec ces électrodes respectivement, en perforant la feuille de couverture 12.Lugs 2 and 2 ′ fixed to the end of cables 3 and 3 ′ respectively are applied to the face of the panel 1 where the cover sheet 12 is fixed, opposite the electrodes 11 and 11 ′, and have claws capable of '' Establish contact with these electrodes respectively, by perforating the cover sheet 12.

Selon le mode de réalisation conforme à l'invention choisi et représenté figure 2, la cosse 2 dans son ensemble comprend une douille tubulaire 20 formée par roulage et un corps 21 constitué d'une plaquette rectangulaire. La plaquette ou corps 21 et la douille 20 sont d'une pièce et découpées dans une feuille de cuivre. De la face de la plaquette 21 font saillie, à l'opposé du roulage de la douille 20, six griffes 22, dont une seule est munie de références pour la clarté du dessin, disposées suivant un motif en quinconce, dont la maille de base comporte quatre emplacements aux sommets d'un rectangle et un emplacement à l'intersection des deux diagonales. Ici la sixième griffe est au centre d'une maille fictive, décalée d'une longueur de côté par rapport à la maille réelle.According to the embodiment according to the invention chosen and shown in Figure 2, the terminal 2 as a whole comprises a tubular sleeve 20 formed by rolling and a body 21 consisting of a rectangular plate. The plate or body 21 and the sleeve 20 are in one piece and cut from a copper foil. From the face of the plate 21 protrude, opposite the rolling of the sleeve 20, six claws 22, only one of which is provided with references for the clarity of the drawing, arranged in a staggered pattern, including the basic mesh has four locations at the vertices of a rectangle and one location at the intersection of the two diagonals. Here the sixth claw is in the center of a fictitious mesh, offset by a side length compared to the real mesh.

Les griffes 22 sont en forme de triangles isocèles, avec deux côtés égaux 23 et 24, libres, qui forment entre eux un angle au sommet aigu, qui est ici d'environ 30°, et un troisième côté 25 où la griffe s'enracine dans la plaquette 21. Ces griffes 22 sont exécutées par crevé de la plaquette 21 suivant les deux côtés égaux du triangle, et cambrage à l'équerre des griffes avec une pliure suivant le troisième côté 25. La griffe 22 laisse ainsi dans la plaquette une empreinte ou ouverture en triangle isocèle 26. Comme on le voit les ouvertures 26 sont toutes parallèles, et les bissectrices de l'angle au sommet entre les côtés égaux sont dirigées parallèlement au grand côté de la plaquette 21.The claws 22 are in the form of isosceles triangles, with two equal sides 23 and 24, free, which form between them an angle at the acute apex, which is here about 30 °, and a third side 25 where the claw takes root in the wafer 21. These claws 22 are executed by puncturing the wafer 21 along the two equal sides of the triangle, and bending the claws at right angles with a fold on the third side 25. The claw 22 thus leaves in the wafer a imprint or isosceles triangle opening 26. As can be seen, the openings 26 are all parallel, and the bisectors of the angle at the apex between the equal sides are directed parallel to the long side of the plate 21.

Comme représenté à la figure 4, pour établir la jonction entre le câble 3 (ou 3′) et l'électrode 11 (ou 11′), dans un premier temps l'extrémité dénudée du câble est sertie dans la douille 20, par enfoncement de cette douille en 20a ; ensuite la cosse 2 est placée dans une pince dont la structure et le fonctionnement présentent certaines analogies avec une agrafeuse. La cosse 2, dans sa pince est appliquée, griffes 22 en avant sur la feuille de couverture 12 au-dessus de l'électrode 11. Par fermeture de la pince, la plaquette 21 est poussée par un premier mors ou marteau en direction d'un second mors, ou enclume qui porte sous le panneau 1 en face du marteau ; les griffes 22 traversent toute l'épaisseur du panneau 1, perforant la feuille de couverture 12, l'électrode 11, la nappe sous-jacente 10, et la feuille de couverture 13 pour émerger de la seconde face du panneau 1. L'enclume de la pince comporte des rainures oblongues, à profil longitudinal concave arrondi, ces rainures présentant une première extrémité qui reçoit la pointe de griffe 22, et s'étendant, parallèlement à la hauteur des ouvertures 26, jusqu'à une seconde extrémité, en sens opposé des ouvertures 26. Le rapprochement des mors, marteau et enclume, force les pointes des griffes 22 dans les rainures, ces pointes glissant sur le fond des rainures vers la seconde extrémité. Les griffes se déforment plastiquement, pour prendre la forme schématisée sur la figure 4, la nature du métal constituant la cosse et le taux de déformation imposé étant tels que la limite élastique est largement dépassée.As shown in Figure 4, to establish the junction between the cable 3 (or 3 ′) and the electrode 11 (or 11 ′), firstly the stripped end of the cable is crimped into the socket 20, by pushing in of this socket at 20 a ; then the terminal 2 is placed in a clamp whose structure and operation have certain analogies with a stapler. The terminal 2, in its clamp is applied, claws 22 forward on the cover sheet 12 above the electrode 11. By closing the clamp, the plate 21 is pushed by a first jaw or hammer in the direction of a second jaw, or anvil which bears under the panel 1 in front of the hammer; the claws 22 pass through the entire thickness of the panel 1, perforating the cover sheet 12, the electrode 11, the underlying ply 10, and the cover sheet 13 to emerge from the second face of the panel 1. The anvil of the clamp has oblong grooves, with a rounded concave longitudinal profile, these grooves having a first end which receives the claw tip 22, and extending, parallel to the height of the openings 26, up to a second end, in the direction opposite openings 26. The approximation of the jaws, hammer and anvil, forces the tips of the claws 22 in the grooves, these tips sliding on the bottom of the grooves towards the second end. The claws deform plastically, to take the form shown diagrammatically in FIG. 4, the nature of the metal constituting the terminal and the rate of deformation imposed being such that the elastic limit is greatly exceeded.

Ainsi déformée la griffe 22 comprend, à partir du cambrage d'origine 25, une première partie 22a normale à la plaquette 21, qui s'étend à travers le panneau 1 au-delà de la seconde face, puis un cambrage 27 sur un angle de pliage d'au moins 90°, le pli de cambrage étant parallèle à celui du cambrage 25 suivant le troisième côté de triangle, et enfin une partie de pointe 22b fortement pressée contre la face inférieure du panneau, s'incrustant plus ou moins dans la feuille de couverture 13.Thus deformed, the claw 22 comprises, from the original bending 25, a first part 22 a normal to the plate 21, which extends through the panel 1 beyond the second face, then a bending 27 on a folding angle of at least 90 °, the bending fold being parallel to that of the bending 25 along the third side of the triangle, and finally a tip portion 22 b strongly pressed against the underside of the panel, becoming more or less in cover sheet 13.

On comprend que la griffe 22 doit être assez longue pour que la partie de pointe 22b porte contre la feuille de couverture à une distance non nulle du cambrage 27, afin que le serrage entre plaquette 21 et extrémité de griffe 22b soit effectif, et que la première partie 22a ne soit pas déformée en agrandissant, dans la direction longitudinale, son passage dans l'électrode 11, ce qui serait préjudiciable au contact. En conséquence la longueur des griffes doit être au moins égale au double de l'épaisseur cumulée de la plaquette 21 et du panneau 1, ou, si l'épaisseur du panneau est nettement inférieure à celle de la plaquette, supérieure au double de l'épaisseur de la plaquette 21, la hauteur de griffe étant comptée à partir de la face de la plaquette sur laquelle elle fait saillie. On rappelle que l'épaisseur de plaquette détermine le rayon de cambrage minimal de la grille, compté sur la fibre neutre. Par sécurité, et également pour des facilités d'exécution des outils de découpe et cambrage de la plaquette, la longueur de la griffe 22, en saillie de la plaquette 21 sera prise entre 4 et 6 fois l'épaisseur de plaquette. Dans un exemple particulier de réalisation, la plaquette présente une épaisseur de 0,8 mm, et les griffes 22 ont environ 4 mm de hauteur.It is understood that the claw 22 must be long enough for the tip portion 22 b to bear against the cover sheet at a non-zero distance from the arch 27, so that the clamping between plate 21 and end of claw 22 b is effective, and that the first part 22 a is not deformed by enlarging, in the longitudinal direction, its passage in the electrode 11, which would be detrimental to the contact. Consequently the length of the claws must be at least equal to twice the cumulative thickness of the plate 21 and of the panel 1, or, if the thickness of the panel is significantly less than that of the plate, greater than twice the thickness of the plate 21, the height of claw being counted from the face of the plate on which it projects. It is recalled that the thickness of the plate determines the minimum bending radius of the grid, counted on the neutral fiber. For safety, and also for ease of execution of the tools for cutting and bending the wafer, the length of the claw 22, projecting from the wafer 21 will be taken between 4 and 6 times the thickness of the wafer. In a particular embodiment, the plate has a thickness of 0.8 mm, and the claws 22 are approximately 4 mm high.

Un autre paramètre important de la griffe 22 est l'angle au sommet du triangle isocèle qui délimite la griffe. Avec un angle faible, la perforation du panneau est facilitée, et la griffe peut avoir une hauteur relativement grande sans occuper une largeur importante de la plaquette 21. En contrepartie les risques de flambage de la griffe sous l'effet de perforation sont augmentées. Un angle au sommet important, outre qu'il conduit à une réduction de la hauteur de griffe et de la capacité de perforation, rend plus délicate l'exécution du second cambrage 27, sous le panneau, en exagérant la section de griffe à l'emplacement du cambrage. L'angle au sommet sera donc avantageusement compris entre 20° et 40°, l'angle de 30° retenu pour l'exemple décrit ici étant considéré comme une valeur typique.Another important parameter of the claw 22 is the angle at the top of the isosceles triangle which delimits the claw. With a small angle, the perforation of the panel is facilitated, and the claw can have a relatively large height without occupying a large width of the plate 21. In return the risks of buckling of the claw under the perforation effect are increased. A large angle at the top, in addition to reducing the claw height and the perforation capacity, makes it more difficult to execute the second arch 27, under the panel, by exaggerating the claw section at the arching location. The angle at the top will therefore advantageously be between 20 ° and 40 °, the angle of 30 ° used for the example described here being considered as a typical value.

La forme en triangle des griffes 22, non seulement résout de façon simple l'exécution d'une pointe apte à la perforation, mais favorise la déformation progressive de la griffe de la pointe vers la racine, la section de la griffe, et parallèlement l'effort nécessaire à la déformation croissant de la pointe à la racine. En outre le passage de la griffe 22 à travers l'électrode 11 voit sa largeur croître avec l'enfoncement de la griffe, et les flancs latéraux 23 et 24 accentuent leur effort contre le côté correspondant du passage dans l'électrode 11, pour assurer un contact électrique fiable.The triangular shape of the claws 22 not only solves in a simple manner the execution of a point suitable for perforation, but promotes the progressive deformation of the claw from the point towards the root, the section of the claw, and in parallel the effort required for increasing deformation from tip to root. In addition the passage of the claw 22 through the electrode 11 sees its width increase with the depression of the claw, and the lateral flanks 23 and 24 increase their force against the corresponding side of the passage in the electrode 11, to ensure reliable electrical contact.

On comprendra que l'outillage de découpe et cambrage de la cosse 2 peut être relativement simple et peu coûteux, la conception de la prise de contact de la cosse 2 avec l'électrode 1, et de la fixation par pressage de la pointe de griffe contre la seconde face du panneau 2 autorisant des tolérances larges. Notamment les flancs 23 et 24 des griffes 22 s'écartent quelque peu de plans géométriques définis par les droites constituant côtés égaux de triangle isocèle et les normales aux faces provenant des faces principales de la plaquette. Ce qui est essentiel pour les griffes 22 est que la projection des pointes sur le plan de plaquette passe sensiblement par le milieu du troisième côté 25, et que la largeur de griffe croisse de façon monotone de la pointe à la racine.It will be understood that the tool for cutting and bending the terminal 2 can be relatively simple and inexpensive, the design of the contact of the terminal 2 with the electrode 1, and of the fixing by pressing of the claw tip against the second face of the panel 2 allowing wide tolerances. In particular the sides 23 and 24 of the claws 22 deviate somewhat from the geometric planes defined by the lines constituting equal sides of isosceles triangle and the normals to the faces coming from the main faces of the wafer. What is essential for the claws 22 is that the projection of the points on the plate plane passes substantially through the middle of the third side 25, and that the width of the claw increases monotonously from the point to the root.

La figure 5 représente une barrette 5 dans son ensemble comprenant une multiplicité de cosses 51-59 de forme générale correspondant à la cosse 2 de la figure 2, avec notamment une douille 201 à 209 et une plaquette 211 à 219 respectivement ; les plaquettes comportent des griffes 221 à 229, seule la griffe 221 de la cosse 51 portant un chiffre de référence, pour ne pas surcharger inutilement le dessin.FIG. 5 represents a bar 5 as a whole comprising a multiplicity of terminals 51-59 of general shape corresponding to the terminal 2 of FIG. 2, with in particular a socket 201 to 209 and a plate 211 to 219 respectively; the plates have claws 221 to 229, only the claw 221 of the terminal 51 bearing a reference number, so as not to unnecessarily overload the drawing.

Chaque plaquette, à l'exception des plaquettes d'extrémité, ici 211 et 219, est liée aux plaquettes qui les précèdent et suivent dans la multiplicité par des ponts frangibles 60a et 60b. Cette disposition permet de munir la pince de pose d'un magasin qui recevra la barrette, d'où la position de pose de la pince sera alimentée. Il est clair que la formation des jonctions entre câbles et panneaux est ainsi rendue plus aisée et rapide.Each plate, with the exception of the end plates, here 211 and 219, is linked to the plates which precede and follow them in multiplicity by frangible bridges 60 a and 60 b . This arrangement makes it possible to provide the installation clamp with a magazine which will receive the bar, from which the positioning position of the clamp will be supplied. It is clear that the formation of junctions between cables and panels is thus made easier and faster.

On aura compris que les barrettes sont exécutées sur un outil à suite, avec une succession de postes où seront effectués par exemple le crevé-cambrage des griffes, le détourage de la cosse en ménageant les ponts et le roulage des douilles, en partant d'un flan en bande. L'agencement d'un tel outil à suite est de la compétence d'un outilleur.It will be understood that the bars are executed on a tool in succession, with a succession of positions where the puncture-bending of the claws will be carried out, the clipping of the terminal by sparing the bridges and the rolling of the sockets, starting from a strip blank. The arrangement of such a tool in succession is the competence of a toolmaker.

La figure 6 représente une variante de barrette 5, où les cosses 51-54 sont alignées longitudinalement. Les ponts frangibles se réduisent au seul pont 60c, constitué par une patte qui relie le milieu du côté frontal opposé à la douille 201, 202, 203, 204 de chaque cosse 51, 52, 53, 54 ... à la douille 202, 203, 204 de la cosse 52, 53, 54 qui la suit immédiatement dans la multiplicité 5. Cette disposition, symétrique par rapport à l'axe longitudinal de la barrette, qui entraîne une longueur de barrette supérieure pour un même nombre de cosses, permet de mieux équilibrer chacun des postes de l'outil de découpe et cambrage. in outre l'outil de cisaillage utilisé pour séparer les cosses peut être plus simple et robuste.Figure 6 shows a variant of strip 5, where the lugs 51-54 are aligned longitudinally. Frangible bridges are reduced to the only bridge 60 c , constituted by a lug which connects the middle of the frontal side opposite to the socket 201, 202, 203, 204 of each terminal 51, 52, 53, 54 ... to the socket 202 , 203, 204 of the terminal 52, 53, 54 which immediately follows it in multiplicity 5. This arrangement, symmetrical with respect to the longitudinal axis of the bar, which results in a longer bar length for the same number of terminals, allows to better balance each of the cutting and bending tool positions. in addition the shearing tool used to separate the terminals can be simpler and more robust.

Bien entendu l'invention n'est pas limitée aux exemples décrits, mais en embrasse toutes les variantes d'exécution, dans le cadre des revendications.Of course, the invention is not limited to the examples described, but embraces all of the variant embodiments thereof, within the scope of the claims.

Claims (15)

1. Jonction d'un câble d'amenée de courant (3) à une électrode (11) en bande de clinquant d'un panneau (1) laminé souple, notamment panneau chauffant, muni sur l'une et l'autre de ses faces principales de feuilles de couverture isolantes (12, 13), la jonction comprenant une cosse (2) constituée, d'une pièce, d'une douille (20) où est fixé le câble (3), et d'un corps laminaire avec au moins une plaquette (21), généralement plane et rectangulaire, appliquée sur une première face du panneau (1) en regard de l'électrode (11) et munie de griffes (22) perforant la feuille de couverture (12) et pénétrant dans l'électrode (11), au moins un élément du corps (22b) étant pressé contre la seconde face du panneau (1) sous la plaquette (21) par déformation plastique d'une zone (27) du corps entre plaquette (21) et élément (22b), caractérisée en ce que le corps de cosse (2) comprend uniquement une plaquette (21) avec une pluralité de griffes (22), chacune en forme de triangle isocèle et exécutée par crevé suivant les deux côtés égaux (23, 24) du triangle formant entre eux un angle aigu, et cambrage à l'équerre suivant le troisième côté (25), les griffes (22) traversant entièrement le panneau (1) de la première face à la seconde et étant rabattues en sens opposé des crevés suivant un cambrage (27) parallèle au troisième côté (25) du triangle, les parties rabattues (22b) occupant une part substantielle de la hauteur du triangle et constituant lesdits éléments de corps pressés contre la seconde face.1. Junction of a current supply cable (3) to an electrode (11) in foil strip of a flexible laminated panel (1), in particular a heating panel, provided on both of its main faces of insulating cover sheets (12, 13), the junction comprising a terminal (2) consisting of a part, a socket (20) where the cable (3) is fixed, and a laminar body with at least one plate (21), generally flat and rectangular, applied to a first face of the panel (1) facing the electrode (11) and provided with claws (22) perforating the cover sheet (12) and penetrating in the electrode (11), at least one element of the body (22 b ) being pressed against the second face of the panel (1) under the plate (21) by plastic deformation of an area (27) of the body between plate ( 21) and element (22 b ), characterized in that the terminal body (2) only comprises a plate (21) with a plurality of claws (22), each in the form of a t isosceles riangle executed by punctured along the two equal sides (23, 24) of the triangle forming between them an acute angle, and bending at right angles along the third side (25), the claws (22) passing entirely through the panel (1 ) from the first face to the second and being folded in the opposite direction from the punctures in a bend (27) parallel to the third side (25) of the triangle, the folded parts (22 b ) occupying a substantial part of the height of the triangle and constituting said body elements pressed against the second face. 2. Jonction selon la revendication 1, caractérisée en ce que lesdites parties rabattues (22b) sont incrustées en extrémité dans la feuille de couverture (13) de la seconde face du panneau.2. Junction according to claim 1, characterized in that said folded parts (22 b ) are encrusted at the end in the cover sheet (13) of the second face of the panel. 3. Jonction selon l'une des revendications 1 et 2, caractérisée en ce que l'angle aigu entre les côtés égaux (23, 24) est compris entre 20° et 40°.3. Junction according to one of claims 1 and 2, characterized in that the acute angle between the equal sides (23, 24) is between 20 ° and 40 °. 4. Jonction selon l'une quelconque des revendications 1 à 3, caractérisée en ce que les crevés (26) de griffes sont orientés parallèlement entre eux.4. Junction according to any one of claims 1 to 3, characterized in that the punctures (26) of claws are oriented parallel to each other. 5. Jonction selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la hauteur des triangles, normalement au troisième côté (25), est au moins le double de l'épaisseur cumulée de la plaquette (21) et du panneau (1).5. Junction according to any one of claims 1 to 4, characterized in that the height of the triangles, normally on the third side (25), is at least twice the cumulative thickness of the plate (21) and the panel (1). 6. Jonction selon la revendication 5, caractérisée en ce que la hauteur des triangles est comprise entre 4 et 6 fois l'épaisseur de la plaquette (21), celle-ci étant supérieure à l'épaisseur du panneau (1).6. Junction according to claim 5, characterized in that the height of the triangles is between 4 and 6 times the thickness of the plate (21), the latter being greater than the thickness of the panel (1). 7. Jonction selon la revendication 6, caractérisée en ce que l'épaisseur de la plaquette (21) étant d'environ 0,8 mm, la hauteur des griffes (22) est de l'ordre de 4 mm.7. Junction according to claim 6, characterized in that the thickness of the plate (21) being about 0.8 mm, the height of the claws (22) is of the order of 4 mm. 8. Jonction selon une quelconque des revendications 1 à 7, caractérisée en ce que la pluralité comprend six griffes (22), disposées suivant un motif en quinconce.8. Junction according to any one of claims 1 to 7, characterized in that the plurality comprises six claws (22), arranged in a staggered pattern. 9. Cosse destinée à la jonction d'un câble d'amenée (3) de courant à une électrode (11) en bande de clinquant d'un panneau (1) laminé souple, notamment panneau chauffant muni, sur l'une et l'autre de ses faces principales, de feuilles de couverture isolantes (12, 13), la cosse (2) comprenant, d'une pièce, une douille (20) destinée à la fixation du câble (3), un corps laminaire avec au moins une plaquette (21) généralement plane et rectangulaire munie de griffes (22) aptes à perforer une feuille de couverture (12) et pénétrer dans l'électrode (11) sous-jacente par application de la plaquette (21) sur une première face du panneau (1) en regard de l'électrode (11), et au moins un élément (22b) apte à être pressé contre la seconde face du panneau (1) sous la plaquette (21) par déformation plastique d'une zone (27) du corps intermédiaire entre la plaquette (21) de l'élément (22b), caractérisée en ce que le corps est constitué uniquement d'une plaquette (21) avec une pluralité de griffes (22) chacune en forme de triangle isocèle et exécutée par crevé de la plaquette (21) suivant les deux côtés égaux (23, 24) formant entre eux un angle aigu et cambrage à l'équerre suivant un troisième côté (25), ces griffes (22) présentant une hauteur, en saillie de la plaquette (21), supérieure au double de l'épaisseur de celle-ci, et une capacité de déformation plastique en cambrage dans une direction opposée à celle du crevé (26) suffisante pour venir se presser contre la plaquette (21) au moins par leur extrémité (22b).9. Terminal intended for the connection of a current supply cable (3) to an electrode (11) in foil strip of a flexible laminated panel (1), in particular a heated panel provided, on one and the 'other of its main faces, of insulating cover sheets (12, 13), the terminal (2) comprising, in one piece, a sleeve (20) intended for fixing the cable (3), a laminar body with at less a generally flat and rectangular plate (21) provided with claws (22) capable of perforating a cover sheet (12) and penetrating into the underlying electrode (11) by applying the plate (21) to a first face of the panel (1) opposite the electrode (11), and at least one element (22 b ) capable of being pressed against the second face of the panel (1) under the plate (21) by plastic deformation of an area (27) of the body intermediate between the plate (21) of the element (22 b ), characterized in that the body consists only of a plate (21 ) with a plurality of claws (22) each in the shape of an isosceles triangle and executed by a puncture in the plate (21) along the two equal sides (23, 24) forming between them an acute angle and bending at right angles along a third side (25) , these claws (22) having a height, projecting from the plate (21), greater than twice the thickness thereof, and a capacity for plastic deformation in bending in a direction opposite to that of the punctured (26) sufficient to come to press against the plate (21) at least by their end (22b). 10. Cosse selon la revendication 9, caractérisée en ce que l'angle aigu entre les côtés égaux (23, 24) du triangle est compris entre 20° et 40°.10. Terminal according to claim 9, characterized in that the acute angle between the equal sides (23, 24) of the triangle is between 20 ° and 40 °. 11.Cosse selon l'une quelconque des revendications 9 et 10, caractérisée en ce que les crevés (26) de griffe sont orientés parallèlement entre eux.11. Lug according to any one of claims 9 and 10, characterized in that the punctures (26) of claw are oriented parallel to each other. 12. Cosse selon une quelconque des revendications 9 à 11, caractérisée en ce que la hauteur des griffes (22) en saillie de la plaquette (21) est comprise entre 4 et 6 fois l'épaisseur de la plaquette.12. Terminal according to any one of claims 9 to 11, characterized in that the height of the claws (22) projecting from the plate (21) is between 4 and 6 times the thickness of the plate. 13. Cosse selon la revendication 12, caractérisée en ce que l'épaisseur de la plaquette (21) étant de l'ordre de 0,8 mm, la hauteur des griffes (22) est de l'ordre de 4 mm.13. A terminal according to claim 12, characterized in that the thickness of the plate (21) being of the order of 0.8 mm, the height of the claws (22) is of the order of 4 mm. 14. Cosse selon une quelconque des revendications 9 à 13, caractérisée en ce que la pluralité comprend six griffes (22) disposées suivant un motif en quinconce.14. Terminal according to any one of claims 9 to 13, characterized in that the plurality comprises six claws (22) arranged in a staggered pattern. 15. Barrette de cosses selon une quelconque des revendications 9 à 14, caractérisée en ce qu'elle comporte une multiplicité de cosses (51-59) alignées formant une bande allongée (5), les cosses étant disposées parallèles entre elles et réunies par des ponts frangibles (60a, 60b, 60c).15. Terminal strip according to any one of claims 9 to 14, characterized in that it comprises a multiplicity of terminals (51-59) aligned forming an elongated strip (5), the terminals being arranged parallel to each other and joined by frangible bridges (60 a , 60 b , 60 c ).
EP89402576A 1988-10-18 1989-09-20 Junction of a cable and an electrode on a laminated panel, in particular a heating panel, by a piercing cable terminal, cable terminal for such a junction and plate consisting of a multiplicity of joined cable terminals Expired - Lifetime EP0365376B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8813697A FR2638026B1 (en) 1988-10-18 1988-10-18 CONNECTION OF A CABLE TO A LAMINATED PANEL ELECTRODE, IN PARTICULAR A HEATING PANEL, BY STAPED TERMINAL, TERMINAL FOR SUCH A JOINT AND A BAR MADE OF A MULTIPLICITY OF LINKED TERMINALS
FR8813697 1988-10-18

Publications (2)

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EP0365376A1 true EP0365376A1 (en) 1990-04-25
EP0365376B1 EP0365376B1 (en) 1994-08-10

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EP89402576A Expired - Lifetime EP0365376B1 (en) 1988-10-18 1989-09-20 Junction of a cable and an electrode on a laminated panel, in particular a heating panel, by a piercing cable terminal, cable terminal for such a junction and plate consisting of a multiplicity of joined cable terminals

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Country Link
EP (1) EP0365376B1 (en)
AT (1) ATE109929T1 (en)
DE (2) DE68917415T2 (en)
ES (1) ES2017903T3 (en)
FR (1) FR2638026B1 (en)
GR (1) GR910300006T1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5692922A (en) * 1993-10-13 1997-12-02 Hoechst Aktiengesellschaft Molding with electrical contact
US6354866B1 (en) * 2000-01-11 2002-03-12 Sumitomo Wiring Systems, Ltd. Terminal fitting
CN103680803A (en) * 2012-09-26 2014-03-26 西门子(深圳)磁共振有限公司 Heat conduction device, refrigeration equipment and magnetic resonance system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648050A (en) * 1950-02-04 1953-08-04 Berg Quentin Electrical connector having insulating piercing barbs
US3752901A (en) * 1971-08-23 1973-08-14 Thomas & Betts Corp Foil connector
GB2081527A (en) * 1980-07-31 1982-02-17 Thomas & Betts Corp Electrical connector for terminating flat multiconductor cable

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648050A (en) * 1950-02-04 1953-08-04 Berg Quentin Electrical connector having insulating piercing barbs
US3752901A (en) * 1971-08-23 1973-08-14 Thomas & Betts Corp Foil connector
GB2081527A (en) * 1980-07-31 1982-02-17 Thomas & Betts Corp Electrical connector for terminating flat multiconductor cable

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5692922A (en) * 1993-10-13 1997-12-02 Hoechst Aktiengesellschaft Molding with electrical contact
US6354866B1 (en) * 2000-01-11 2002-03-12 Sumitomo Wiring Systems, Ltd. Terminal fitting
CN103680803A (en) * 2012-09-26 2014-03-26 西门子(深圳)磁共振有限公司 Heat conduction device, refrigeration equipment and magnetic resonance system
WO2014048984A1 (en) * 2012-09-26 2014-04-03 Siemens Plc Heat conducting device, cooling apparatus, and magnetic resonance system
CN103680803B (en) * 2012-09-26 2017-09-01 西门子(深圳)磁共振有限公司 A kind of heat-transfer device, refrigeration plant and magnetic resonance system

Also Published As

Publication number Publication date
GR910300006T1 (en) 1991-11-15
ES2017903T3 (en) 1994-11-01
DE365376T1 (en) 1991-02-28
FR2638026A1 (en) 1990-04-20
DE68917415T2 (en) 1995-02-09
EP0365376B1 (en) 1994-08-10
ES2017903A4 (en) 1991-03-16
FR2638026B1 (en) 1990-12-21
ATE109929T1 (en) 1994-08-15
DE68917415D1 (en) 1994-09-15

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