EP0051276A1 - Preformed tie to press a cable in the lateral circular groove of a rigid insulator - Google Patents

Preformed tie to press a cable in the lateral circular groove of a rigid insulator Download PDF

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Publication number
EP0051276A1
EP0051276A1 EP81109204A EP81109204A EP0051276A1 EP 0051276 A1 EP0051276 A1 EP 0051276A1 EP 81109204 A EP81109204 A EP 81109204A EP 81109204 A EP81109204 A EP 81109204A EP 0051276 A1 EP0051276 A1 EP 0051276A1
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EP
European Patent Office
Prior art keywords
ligature
cable
ligature according
groove
locking
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.)
Withdrawn
Application number
EP81109204A
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German (de)
French (fr)
Inventor
Lucien Gamet
Michel Willem
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Ceraver SA
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Ceraver SA
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Publication date
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Publication of EP0051276A1 publication Critical patent/EP0051276A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/20—Pin insulators
    • H01B17/22—Fastening of conductors to insulator

Definitions

  • the invention relates to a preformed ligature for clamping a cable in the circular lateral groove of a rigid insulator.
  • ligatures of the "two-wire cross-tie" type are surrounded in the groove of the isolator and then on the cable so as to block the latter in the groove of the isolator.
  • the present invention makes it possible to avoid these drawbacks and relates to a preformed ligature for clamping a cable in the circular lateral groove of a rigid insulator, said ligature being curved in the middle, forming two symmetrical branches having first, respectively, following two arcs of a circle whose radius of curvature is substantially that of the bottom of said groove, the ends of said branches constituting respectively two clips for said cable, characterized in that said middle of the ligature has an elastic fold constituting a locking zone unlocking enclosed in a captive sleeve forming locking-unlocking means.
  • said ligature is folded hairpin at the locking-unlocking area.
  • the ligature is folded so as to substantially form a W at the locking-unlocking zone.
  • the fold is preferably such that the central top of the W is rounded and in contact with the bottom of the throat of the insulator.
  • the captive sleeve enclosing the locking-unlocking zone is capable of translational movement in the plane of the groove and in a direction substantially perpendicular to the cable.
  • This sleeve preferably has two flat faces connected internally by rivets or the like, said rivets being inside the folds of the locking-unlocking zone.
  • two bosses internal to the captive sleeve are provided, cooperating with two complementary bosses presented by the branches of the ligature in the vicinity of the groove.
  • the ligature according to the invention comprises a ring around which said branches are folded before forming said attachments.
  • the ligature can be made up of several metallic wires joined together, the two ends of the ligature being spiraled.
  • the ligature can also be formed of an elastic metal ribbon, the ends of which form a cradle for the cable and can cooperate with a wedge or with a preformed or non-formed wire to immobilize this cable.
  • This ligature is symmetrical with respect to a median section plane orthogonal to the insulator 1 and to the cable 5. It is formed of a few metallic wires secured to each other. It has in its central part a fold 6 having a certain elasticity enclosed in a sleeve 7 which will be described in detail below. It then comprises two branches defining two arcs of a circle 8 and 9 whose radius of curvature is substantially that of the bottom of the groove 4, and which are extended by two spiral fasteners 10 and 11.
  • the two branches are folded around a metal ring 12, in the intermediate zone between the arc of a circle and the spiral attachment corresponding.
  • This flat ring in the form of a buttonhole, substantially follows the curvature of the groove 4. It can be metallic or insulating. It can have a certain elasticity.
  • the middle zone of the ligature defines a so-called locking-unlocking zone and cooperates with the sleeve 7 to allow the blocking of the ligature (FIG. 2A) or its release (FIG. 2B).
  • the sleeve 7 is in the form of a flattened cylinder, its two opposite faces being connected by a rivet 15 or the like, located inside the fold 6 and thus making it captive.
  • the sleeve 7 In the locked position (FIG. 2A) the sleeve 7 is locked against the head 3 of the insulator 1 and compresses the fold 6 so as to define a constriction 16 followed by a boss 17 preventing it from any translational movement moving it away from the insulator head.
  • a translation is carried out, marked by the arrow 20, using a tool; it may be a pinch which is engaged in an opening 14 provided in the sleeve; 1 throttle 16 disappears, the two arcs 8 and 9 move apart and can be released from the bottom of the groove 4.
  • the ligature-cable assembly can then be removed from the head of the insulator, preferably by using a tool essentially consisting of two hooks joined by a transverse bar mounted at the end of a pole.
  • FIGS. 3A, 3B, 3C illustrate a particularly advantageous alternative embodiment of the locking-unlocking zone of a ligature according to the invention. Elements similar to those of FIGS. 2A and 2B have been indicated by the same references.
  • the fold of the ligature has substantially the shape of a W whose branches 30, 31, 32, 33 and the vertex 34 have been referenced.
  • the branches 30 and 33 are connected respectively to the circular arcs 8 and 9 by two bosses 22 and 21.
  • the locking sleeve 27 illustrated in section in FIG. 3C comprises two complementary internal bosses 24, 25 determining a frank locking position.
  • Two rivets 28 and 29 are engaged respectively between the branches 30, 31 on the one hand and 32, 33 on the other hand.
  • the hole provided in the sleeve 27 has been identified 26 to ensure the back and forth translation movement of this sleeve.
  • the sleeve 27 of FIG. 3C has a lower face notched between the two rivets 28 and 29; this facilitates its manufacture but does not in any way modify its function.
  • the variant which has just been described has a very significant advantage, in particular when the wind urges the cable to leave the groove of the insulator. It is found that such an effort has the first effect of applying the vertex 34 of the W more narrowly against the bottom of the throat, and the second effect of spreading the branches apart from one another 30 and 31 and on the other hand the branches 32 and 33. All these effects contribute to the fact that the sleeve 27 is held firmly in place.
  • an operator can, preferably using a tool, release the ligature and the associated cable from the head of the insulator, once the sleeve 27 has been pulled (FIG. 3B ).
  • FIGS 4 and 5 show another alternative embodiment of a ligature according to the invention.
  • This ligature may include in its central part a locking-unlocking zone 40 with associated sleeve similar to one of those which have been described above. It differs from the previous variants by the fact that it essentially consists of an elastic metallic ribbon forming two arcs of a circle, matching the curvature of the groove 4 of the insulator; one of these arcs is referenced 41. The ends 43 and 44 are folded around a ring 45 in the buttonhole also conforming to the curvature of the groove 4.
  • the two ends 43 and 44 form cradles for the cable 5.
  • the cable is also held by a shim 46 and stirrups 47 and 48.
  • the shim and the stirrups are replaced by one or more wires metallic, preformed or not, cooperating with the ends 43 and 44 to immobilize the cable 5.
  • the cable is better retained in the groove of the insulator when it is stressed upwards than with the conventional preformed fastener which, due to its rigidity, forms an ellipse around the bottom of the groove and not a circle.
  • the tightening of the ligature in the groove of the isolator is independent of the operator; just check with the binoculars, for example, that the sleeve has been fully pushed back.
  • a ligature according to the invention is economical when it is carried out in large series.
  • the invention is not limited to the embodiments which have just been described.
  • the ligature according to the invention can no longer be made of metal, but of material having equivalent mechanical characteristics, in particular, elasticity, resistance to bending and to shearing; by way of example, fibers embedded in a resin can be used.

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Abstract

The preformed tie presses a cable (5) in the lateral circular groove (4) of an insulator (1). In its mid-portion the tie has an elastic folded component (6) to form a clamping-unclamping area which cooperates with a clamping- unclamping means (7); it then forms two branches in the form of arcs of a circle 8 and 9 passing within a common ring 12; their ends 10 and 11 form respectively two attachments for the cable (5). <IMAGE>

Description

L'invention concerne une ligature préformée pour serrer un câble dans la gorge latérale circulaire d'un isolateur rigide.The invention relates to a preformed ligature for clamping a cable in the circular lateral groove of a rigid insulator.

Elle s'applique en particulier aux lignes sur isolateurs rigides en moyenne ou basse tension et est destinée à permettre un travail sous tension.It applies in particular to lines on rigid insulators at medium or low voltage and is intended to allow working under voltage.

On connaît des ligatures traditionnelles en métal à l'état écroui ou recuit. Ainsi, les ligatures du type "attache croisée bifilaire" sont entourées dans la gorge de l'isolateur puis sur le câble de manière à, bloquer ce dernier dans la gorge de l'isolateur.We know traditional metal ligatures in the hardened or annealed state. Thus, ligatures of the "two-wire cross-tie" type are surrounded in the groove of the isolator and then on the cable so as to block the latter in the groove of the isolator.

On connaît également des attaches en métal élastique, préformées en spirale correspondant au diamètre du conducteur. Ces attaches peuvent être spiralées suivant toute leur longueur ou seulement aux extrémités, leur partie centrale correspondant alors à la zone en contact avec le diélectrique n'étant pas spiralée. Comme pour les ligatures précédentes, on applique leur partie centrale dans la gorge de l'isolateur ; ensuite on spirale leurs extrémités autour du câble. Ces attaches connues présentent un inconvénient important pour le travail sous tension : pour remplacer un isolateur défectueux, il est nécessaire de dégager l'attache du câble et, celle-ci formant ressort, il y a un risque de court-circuit de l'attache à la masse.Also known are elastic metal fasteners, spiral preformed corresponding to the diameter of the conductor. These fasteners can be spiraled along their entire length or only at the ends, their central part then corresponding to the area in contact with the dielectric not being spiraled. As for the preceding ligatures, their central part is applied in the groove of the insulator; then we spiral their ends around the cable. These known fasteners have a significant drawback for working under voltage: to replace a defective insulator, it is necessary to release the cable fastener and, the latter forming a spring, there is a risk of short circuit of the fastener to ground.

La présente invention permet d'éviter ces inconvénients et a pour objet une ligature préformée pour serrer un câble dans la gorge latérale circulaire d'un isolateur rigide, ladite ligature étant courbée en son milieu, formant deux branches symétriques se présentant d'abord respectivement suivant deux arcs de cercle dont le rayon de courbure est sensiblement celui du fond de ladite gorge, les extrémités desdites branches constituant respectivement deux attaches pour ledit câble, caractérisée par le fait que ledit milieu de la ligature présente un repli élastique constituant une zone de verrouillage-déverrouillage enserrée dans un manchon imperdable formant moyen de verrouillage-déverrouillage..The present invention makes it possible to avoid these drawbacks and relates to a preformed ligature for clamping a cable in the circular lateral groove of a rigid insulator, said ligature being curved in the middle, forming two symmetrical branches having first, respectively, following two arcs of a circle whose radius of curvature is substantially that of the bottom of said groove, the ends of said branches constituting respectively two clips for said cable, characterized in that said middle of the ligature has an elastic fold constituting a locking zone unlocking enclosed in a captive sleeve forming locking-unlocking means.

Selon un premier mode de réalisation ladite ligature est repliée en épingle à cheveu au niveau de la zone de verrouillage-déverrouillage.According to a first embodiment, said ligature is folded hairpin at the locking-unlocking area.

Selon un second mode de réalisation, la ligature est repliée de manière à former sensiblement un W au niveau de la zone de verrouillage-déverrouillage. En position verrouillée le repli est de préférence tel que le sommet central du W est arrondi et en contact avec le fond de la gorge de l'isolateur.According to a second embodiment, the ligature is folded so as to substantially form a W at the locking-unlocking zone. In the locked position, the fold is preferably such that the central top of the W is rounded and in contact with the bottom of the throat of the insulator.

Le manchon imperdable enserrant la zone de verrouillage-déverrouillage est susceptible d'un mouvement de translation dans le plan de la gorge et dans une direction sensiblement perpendiculaire au câble.The captive sleeve enclosing the locking-unlocking zone is capable of translational movement in the plane of the groove and in a direction substantially perpendicular to the cable.

Ce manchon présente de préférence deux faces planes reliées intérieurement par des rivets ou analogues, lesdits rivets se trouvant à l'intérieur des replis de la zone de verrouillage-déverrouillage.This sleeve preferably has two flat faces connected internally by rivets or the like, said rivets being inside the folds of the locking-unlocking zone.

Afin de rendre plus franche la position de verrouillage, on prévoit deux bossages internes au manchon imperdable coopérant avec deux bossages complémentaires présentés par les branches de la ligature au voisinage de la gorge.In order to make the locking position more frank, two bosses internal to the captive sleeve are provided, cooperating with two complementary bosses presented by the branches of the ligature in the vicinity of the groove.

De préférence la ligature selon l'invention comporte un anneau autour duquel sont repliées lesdites branches avant de former lesdites attaches.Preferably the ligature according to the invention comprises a ring around which said branches are folded before forming said attachments.

La ligature peut être constituée par plusieurs fils métalliques solidarisés entre eux, les deux extrémités de la ligature étant spiralées.The ligature can be made up of several metallic wires joined together, the two ends of the ligature being spiraled.

La ligature peut être également formée d'un ruban métallique élastique, dont les extrémités forment berceau pour le câble et peuvent coopérer avec une cale ou avec un fil préformé ou non pour immobiliser ce câble.The ligature can also be formed of an elastic metal ribbon, the ends of which form a cradle for the cable and can cooperate with a wedge or with a preformed or non-formed wire to immobilize this cable.

Dans toutes les variantes qui viennent d'être exposées, on peut obtenir le déverrouillage à l'aide d'un outil exerçant un effort sur le manchon imperdable de manière à l'éloigner de l'isolateur suivant une simple translation.In all the variants which have just been exposed, it is possible to obtain unlocking using a tool exerting a force on the captive sleeve so as to move it away from the insulator in a simple translation.

Il en résulte un écartement des deux branches de la ligature qui permet à un opérateur de la dégager facilement, avantageusement à l'aide d'un outil, de la gorge de l'isolateur, le câble étant toujours maintenu dans ses attaches. On voit donc qu'il est aisé de dégager le câble avec sa ligature quand il est besoin de remplacer l'isolateur.This results in a separation of the two branches of the ligature which allows an operator to easily release it, advantageously using a tool, from the groove of the insulator, the cable being always held in its fasteners. We therefore see that it is easy to release the cable with its tie when it is necessary to replace the insulator.

D'autres avantages de la présente invention apparaîtront au cours de la description suivante qui sera faite à l'aide du dessin annexé donné à titre illustratif, mais nullement limitatif et dans lequel :

  • - la figure 1 est une vue en perspective d'un isolateur rigide en verre trempé dans la gorge duquel est retenu un câble grâce à une ligature selon l'invention,
  • - la figure 2A est une coupe de l'isolateur de la figure 1 au niveau de sa gorge et montrant en vue de dessus la ligature en position de verrouillage,
  • - la figure 2B est analogue à la figure 2A mais montre la ligature en position de déverrouillage,
  • - la figure 3A est une vue analogue à la figure 2A mais montre une variante de réalisation de la zone de verrouillage-déverrouillage,
  • - la figure 3B montre en position de déverrouillage la ligature de la figure 3A,
  • - la figure 3C montre à l'échelle agrandie la zone de verrouillage-déverrouillage de la figure 3A,
  • - la figure 4 montre schématiquement en perspective une ligature selon l'invention en forme de ruban,
  • - la figure 5 est une coupe montrant à grande échelle un détail de la figure 4.
Other advantages of the present invention will appear during the following description which will be made with the aid of the appended drawing given by way of illustration, but in no way limiting and in which:
  • FIG. 1 is a perspective view of a rigid insulator made of tempered glass in the groove of which a cable is retained by means of a ligature according to the invention,
  • FIG. 2A is a section through the insulator of FIG. 1 at its throat and showing a top view of the ligature in the locked position,
  • - Figure 2B is similar to Figure 2A but shows the ligature in the unlocked position,
  • FIG. 3A is a view similar to FIG. 2A but shows an alternative embodiment of the locking-unlocking zone,
  • FIG. 3B shows the ligature of FIG. 3A in the unlocked position,
  • FIG. 3C shows on an enlarged scale the locking-unlocking zone of FIG. 3A,
  • FIG. 4 schematically shows in perspective a ligature according to the invention in the form of a ribbon,
  • FIG. 5 is a section showing on a large scale a detail of FIG. 4.

On voit en perspective sur la figure 1 un isolateur 1 en verre trempé présentant une jupe 2, une tête 3 et une gorge 4 dans laquelle doit être retenu un câble 5 par une ligature selon l'invention.We see in perspective in Figure 1 an insulator 1 of tempered glass having a skirt 2, a head 3 and a groove 4 in which must be retained a cable 5 by a ligature according to the invention.

Cette ligature, plus nettement visible dans les figures 2A et 2B est symétrique par rapport à un plan de coupe médian orthogonal à l'isolateur 1 et au câble 5. Elle est formée de quelques fils métalliques solidarisés entre eux. Elle comporte dans sa partie centrale un repli 6 présentant une certaine élasticité enserré dans un manchon 7 que l'on décrira en détail plus loin. Elle comporte ensuite deux branches définissant deux arcs de cercle 8 et 9 dont le rayon de courbure est sensiblement celui du fond de la gorge 4, et qui se prolongent par deux attaches spiralées 10 et 11.This ligature, more clearly visible in FIGS. 2A and 2B, is symmetrical with respect to a median section plane orthogonal to the insulator 1 and to the cable 5. It is formed of a few metallic wires secured to each other. It has in its central part a fold 6 having a certain elasticity enclosed in a sleeve 7 which will be described in detail below. It then comprises two branches defining two arcs of a circle 8 and 9 whose radius of curvature is substantially that of the bottom of the groove 4, and which are extended by two spiral fasteners 10 and 11.

Les deux branches sont repliées autour d'un anneau métallique 12, dans la zone intermédiaire entre l'arc de cercle et l'attache spiralée correspondante. Cet anneau plat, en forme de boutonnière, épouse sensiblement la courbure de la gorge 4. Il peut être métallique ou isolant. Il peut présenter une certaine élasticité.The two branches are folded around a metal ring 12, in the intermediate zone between the arc of a circle and the spiral attachment corresponding. This flat ring, in the form of a buttonhole, substantially follows the curvature of the groove 4. It can be metallic or insulating. It can have a certain elasticity.

La zone médiane de la ligature définit une zone dite de verrouillage-déverrouillage et coopère avec le manchon 7 pour permettre le blocage de la ligature (figure 2A) ou son déblocage (figure 2B). Le manchon 7 se présente sous la forme d'un cylindre aplati, ses deux faces opposées étant reliées par un rivet 15 ou analogue, situé à l'intérieur du repli 6 et le rendant ainsi imperdable.The middle zone of the ligature defines a so-called locking-unlocking zone and cooperates with the sleeve 7 to allow the blocking of the ligature (FIG. 2A) or its release (FIG. 2B). The sleeve 7 is in the form of a flattened cylinder, its two opposite faces being connected by a rivet 15 or the like, located inside the fold 6 and thus making it captive.

En position de verrouillage (figure 2A) le manchon 7 est bloqué contre la tête 3 de l'isolateur 1 et comprime le repli 6 de manière à définir un étranglement 16 suivi d'un bossage 17 lui interdisant tout mouvement de translation l'écartant de la tête de l'isolateur.In the locked position (FIG. 2A) the sleeve 7 is locked against the head 3 of the insulator 1 and compresses the fold 6 so as to define a constriction 16 followed by a boss 17 preventing it from any translational movement moving it away from the insulator head.

Pour déverrouiller la ligature, (figure 2B) on effectue à l'aide d'un outil une translation repérée par la flèche 20 ; il peut s'agir d'un pinçon que l'on engage dans une ouverture 14 prévue dans le manchon ; 1 étranglement 16 disparaît, les deux arcs 8 et 9 s'écartent et peuvent être libérés du fond de la gorge 4.To unlock the ligature (FIG. 2B), a translation is carried out, marked by the arrow 20, using a tool; it may be a pinch which is engaged in an opening 14 provided in the sleeve; 1 throttle 16 disappears, the two arcs 8 and 9 move apart and can be released from the bottom of the groove 4.

L'ensemble ligature-câble peut alors être ôté de la tête de l'isolateur, préférentiellement par mise en oeuvre d'un outil constitué essentiellement de deux crochets réunis par une barre transversale montée au bout d'une perche.The ligature-cable assembly can then be removed from the head of the insulator, preferably by using a tool essentially consisting of two hooks joined by a transverse bar mounted at the end of a pole.

Ainsi, on accroche les deux crochets de l'outil sur le câble de part et d'autre de la tête 3 de l'isolateur, on fait tourner cet outil autour de l'axe formé par le câble jusqu'à ce que la barre transversale précitée vienne en appui sur la tête 3 de l'isolateur. En poursuivant le IDouvement, l'opérateur sort de la gorge 4 l'ensemble formé par la ligature et le câble.Thus, we hook the two hooks of the tool on the cable on either side of the head 3 of the insulator, we rotate this tool around the axis formed by the cable until the bar abovementioned transverse comes to bear on the head 3 of the insulator. Continuing the I D opening, the operator exits from the groove 4 the assembly formed by the ligature and the cable.

Les figures 3A, 3B, 3C illustrent une variante de réalisation particulièrement avantageuse de la zone de verrouillage-déverrouillage d'une ligature selon l'invention. On a indiqué par les mêmes références les éléments analogues à ceux des figures 2A et 2B.FIGS. 3A, 3B, 3C illustrate a particularly advantageous alternative embodiment of the locking-unlocking zone of a ligature according to the invention. Elements similar to those of FIGS. 2A and 2B have been indicated by the same references.

Le repli de la ligature a sensiblement la forme d'un W dont on a référencé les branches 30, 31, 32, 33 et le sommet 34.The fold of the ligature has substantially the shape of a W whose branches 30, 31, 32, 33 and the vertex 34 have been referenced.

En position de verrouillage (figures 3A et 3C) le sommet 34 du W vient au contact du fond de la gorge 4, et en épouse la forme.In the locked position (Figures 3A and 3C) the top 34 of the W comes into contact with the bottom of the groove 4, and follows its shape.

Les branches 30 et 33 se raccordent respectivement aux arcs de cercle 8 et 9 par deux bossages 22 et 21.The branches 30 and 33 are connected respectively to the circular arcs 8 and 9 by two bosses 22 and 21.

Le manchon de verrouillage 27 illustré en coupe dans la figure 3C comporte deux bossages internes complémentaires 24, 25 déterminant une position de verrouillage franche. Deux rivets 28 et 29 sont engagés respectivement entre les branches 30, 31 d'une part et 32, 33 d'autre part.The locking sleeve 27 illustrated in section in FIG. 3C comprises two complementary internal bosses 24, 25 determining a frank locking position. Two rivets 28 and 29 are engaged respectively between the branches 30, 31 on the one hand and 32, 33 on the other hand.

On a repéré 26 le trou prévu dans le manchon 27 pour assurer le mouvement de translation aller et retour de ce manchon.The hole provided in the sleeve 27 has been identified 26 to ensure the back and forth translation movement of this sleeve.

Le manchon 27 de la figure 3C présente une face inférieure échancrée entre les deux rivets 28 et 29 ; ceci facilite sa fabrication mais ne modifie en rien sa fonction.The sleeve 27 of FIG. 3C has a lower face notched between the two rivets 28 and 29; this facilitates its manufacture but does not in any way modify its function.

La variante de réalisation qui vient d'être décrite présente un avantage très important notamment lorsque le vent sollicite le câble à quitter la gorge de l'isolateur. On constate qu'un tel effort a pour premier effet d'appliquer de manière plus étroite le sommet 34 du W contre le fond de la gorge, et pour second effet d'écarter l'une de l'autre d'une part les branches 30 et 31 et d'autre part les branches 32 et 33. Tous ces effets concourent à ce que le manchon 27 soit maintenu fermement en place.The variant which has just been described has a very significant advantage, in particular when the wind urges the cable to leave the groove of the insulator. It is found that such an effort has the first effect of applying the vertex 34 of the W more narrowly against the bottom of the throat, and the second effect of spreading the branches apart from one another 30 and 31 and on the other hand the branches 32 and 33. All these effects contribute to the fact that the sleeve 27 is held firmly in place.

Comme pour le mode de réalisation des figures 2A et 2B, un opérateur peut, préférentiellement à l'aide d'un outil, dégager de la tête de l'isolateur la ligature et le câble associé, une fois le manchon 27 tiré (figure 3B).As for the embodiment of FIGS. 2A and 2B, an operator can, preferably using a tool, release the ligature and the associated cable from the head of the insulator, once the sleeve 27 has been pulled (FIG. 3B ).

Les figures 4 et 5 montrent une autre variante de réalisation d'une ligature selon l'invention. Cette ligature peut comporter dans sa partie centrale une zone de verrouillage-déverrouillage 40 avec manchon associé analogue à l'une de celles qui ont été décrites plus haut. Elle se distingue des variantes précédentes par le fait qu'elle est constituée essentiellement d'un ruban métallique élastique formant deux arcs de cercle, épousant la courbure de la gorge 4 de l'isolateur ; l'un de ces arcs est référencé 41. Les extrémités 43 et 44 sont repliées autour d'un anneau 45 en boutonnière épousant également la courbure de la gorge 4.Figures 4 and 5 show another alternative embodiment of a ligature according to the invention. This ligature may include in its central part a locking-unlocking zone 40 with associated sleeve similar to one of those which have been described above. It differs from the previous variants by the fact that it essentially consists of an elastic metallic ribbon forming two arcs of a circle, matching the curvature of the groove 4 of the insulator; one of these arcs is referenced 41. The ends 43 and 44 are folded around a ring 45 in the buttonhole also conforming to the curvature of the groove 4.

Les deux extrémités 43 et 44 forment berceaux pour le câble 5. Le câble est maintenu en outre par une cale 46 et des étriers 47 et 48. Selon d'autres variantes non illustrées, la cale et les étriers sont remplacés par un ou plusieurs fils métalliques, préformés ou non, coopérant avec les extrémités 43 et 44 pour immobiliser le câble 5.The two ends 43 and 44 form cradles for the cable 5. The cable is also held by a shim 46 and stirrups 47 and 48. According to other variants not shown, the shim and the stirrups are replaced by one or more wires metallic, preformed or not, cooperating with the ends 43 and 44 to immobilize the cable 5.

Dans toutes les variantes qui viennent d'être décrites, il appa- rait qu'une ligature selon l'invention est appliquée constamment dans la gorge 4 de l'isolateur suivant des lignes de contact et non suivant quelques zones ponctuelles comme c'est le cas pour des attaches préformées spiralées sur toute leur longueur. Il en résulte une diminution importante des contraintes sur le verre.In all the variants which have just been described, it appears that a ligature according to the invention is constantly applied in the groove 4 of the insulator along contact lines and not according to a few point areas as is the case. case for preformed fasteners spiraled over their entire length. This results in a significant reduction in the stresses on the glass.

L'invention présente en outre les avantages suivants :

  • En travail sous tension il n'est pas besoin pour remplacer un isolateur de dégager le câble de la ligature, ce qui est un avantage important car en despiralant la ligature celle-ci formant ressort peut aller faire un court-circuit.
The invention also has the following advantages:
  • When working under tension there is no need to replace an insulator to release the cable from the ligature, which is an important advantage because by despiraling the ligature the latter forming a spring can cause a short circuit.

Le câble est mieux retenu dans la gorge de l'isolateur quand celui- ci est sollicité vers le haut qu'avec l'attache préformée classique qui du fait de sa rigidité forme une ellipse autour du fond de gorge et non un cercle.The cable is better retained in the groove of the insulator when it is stressed upwards than with the conventional preformed fastener which, due to its rigidity, forms an ellipse around the bottom of the groove and not a circle.

Le serrage de la ligature dans la gorge de l'isolateur est indépendant de l'opérateur ; il suffit de vérifier aux jumelles par exemple que le manchon a bien été repoussé à fond.The tightening of the ligature in the groove of the isolator is independent of the operator; just check with the binoculars, for example, that the sleeve has been fully pushed back.

Enfin une ligature selon l'invention est économique lorsqu'elle est réalisée en grande série.Finally, a ligature according to the invention is economical when it is carried out in large series.

Bien entendu l'invention n'est pas limitée aux modes de réalisation qui viennent d'être décrits. Ainsi, la ligature selon l'invention peut être réalisée non plus en métal, mais en matériau ayant des caractéristiques mécaniques équivalentes, notamment, élasticité, résistance à la flexion et au cisaillement ; à titre d'exemple on peut utiliser des fibres noyées dans une résine.Of course, the invention is not limited to the embodiments which have just been described. Thus, the ligature according to the invention can no longer be made of metal, but of material having equivalent mechanical characteristics, in particular, elasticity, resistance to bending and to shearing; by way of example, fibers embedded in a resin can be used.

Claims (14)

1/ Ligature préformée pour serrer un câble (5) dans la gorge latérale circulaire (4) d'un isolateur rigide (1), ladite ligature étant courbée en son milieu, formant deux branches symétriques se présentant d'abord respectivement suivant deux ares de cercle (8, 9) dont le rayon de courbure est sensiblement celui du fond de ladite gorge (4), les extrémités (10, 11) desdites branches (8, 9) constituant respectivement deux attaches pour ledit câble (5), caractérisée par le fait que ledit milieu de la ligature présente un repli élastique (6) constituant une zone de verrouillage-déverrouillage enserrée dans un manchon imperdable (7) formant moyen de verrouillage-déverrouillage, et que ladite ligature comporte un anneau (12) autour duquel sont repliées lesdites branches (8, 9) avant de former lesdites attaches.1 / Preformed ligature for clamping a cable (5) in the circular lateral groove (4) of a rigid insulator (1), said ligature being curved in the middle, forming two symmetrical branches which are first presented respectively in two ares of circle (8, 9) whose radius of curvature is substantially that of the bottom of said groove (4), the ends (10, 11) of said branches (8, 9) respectively constituting two clips for said cable (5), characterized by the fact that said middle of the ligature has an elastic fold (6) constituting a locking-unlocking zone enclosed in a captive sleeve (7) forming locking-unlocking means, and that said ligature comprises a ring (12) around which are folded back said branches (8, 9) before forming said fasteners. 2/ Ligature selon la revendication 1, caractérisée par le fait qu'elle est repliée en épingle à cheveu au niveau de la zone de verrouillage-déverrouillage.2 / ligature according to claim 1, characterized in that it is folded back in a hairpin at the level of the locking-unlocking zone. 3/ Ligature selon la revendication 1, caractérisée par le fait qu'elle est repliée de manière à former un W au niveau de la zone de verrouillage-déverrouillage.3 / ligature according to claim 1, characterized in that it is folded so as to form a W at the locking-unlocking area. 4/ Ligature selon la revendication 3, caractérisée par le fait que le sommet central (34) du W est arrondi et est susceptible d'être en contact avec le fond de ladite gorge, en position de verrouillage.4 / ligature according to claim 3, characterized in that the central apex (34) of the W is rounded and is capable of being in contact with the bottom of said groove, in the locked position. 5/ Ligature selon l'une des revendications précédentes, caractérisée par le fait que ledit manchon (7) comporte deux bossages internes coopérant avec des bossages complémentaires (17) présentés par lesdites branches (8, 9) afin de définir une position franche de verrouillage.5 / ligature according to one of the preceding claims, characterized in that said sleeve (7) has two internal bosses cooperating with complementary bosses (17) presented by said branches (8, 9) in order to define a free locking position . 6/ Ligature selon l'une des revendications précédentes, caractérisée par le fait qu'elle est constituée par plusieurs fils métalliques solidarisés entre eux.6 / ligature according to one of the preceding claims, characterized in that it is constituted by several metal wires secured to each other. 7/ Ligature selon la revendication 6, caractérisée par le fait que lesdites extrémités (10, 11) sont spiralées.7 / ligature according to claim 6, characterized in that said ends (10, 11) are spiral. 8/ Ligature selon l'une des revendications 1 à 5, caractérisée par le fait qu'elle est formée d'un ruban (41) métallique élastique.8 / ligature according to one of claims 1 to 5, characterized in that it is formed of an elastic metal strip (41). 9/ Ligature selon la revendication 8, caractérisée par le fait que les deux extrémités (42, 43) du ruban forment berceau pour le câble (5).9 / ligature according to claim 8, characterized in that the two ends (42, 43) of the ribbon form a cradle for the cable (5). 10/ Ligature selon l'une des revendications 8 et 9, caractérisée par le fait que les extrémités dudit ruban coopérent avec une cale (46) pour le serrage de ce câble (5).10 / ligature according to one of claims 8 and 9, characterized in that the ends of said tape cooperate with a wedge (46) for tightening this cable (5). 11/ Ligature selon l'une des revendications 8 et 9, caractérisée par le fait que les extrémités dudit ruban sont associées à au moins un fil métallique pour former lesdites attaches.11 / ligature according to one of claims 8 and 9, characterized in that the ends of said ribbon are associated with at least one metal wire to form said fasteners. 12/ Ligature selon la revendication 11, caractérisée par le fait que ledit fil est préformé.12 / ligature according to claim 11, characterized in that said wire is preformed. 13/ Ligature selon l'une des revendications précédentes, caractérisée par le fait que ledit anneau (12) épouse la forme de la gorge (4).13 / ligature according to one of the preceding claims, characterized in that said ring (12) follows the shape of the groove (4). 14/ Ligature selon la revendication 13, caractérisée par le fait que ledit anneau est déformable élastiquement.14 / ligature according to claim 13, characterized in that said ring is elastically deformable.
EP81109204A 1980-11-04 1981-10-29 Preformed tie to press a cable in the lateral circular groove of a rigid insulator Withdrawn EP0051276A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8023512 1980-11-04
FR8023512A FR2493585A1 (en) 1980-11-04 1980-11-04 PREFORMED LIGATURE FOR THE RETENTION OF A DRIVER IN THE THROAT OF A RIGID ISOLATOR

Publications (1)

Publication Number Publication Date
EP0051276A1 true EP0051276A1 (en) 1982-05-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109204A Withdrawn EP0051276A1 (en) 1980-11-04 1981-10-29 Preformed tie to press a cable in the lateral circular groove of a rigid insulator

Country Status (3)

Country Link
EP (1) EP0051276A1 (en)
BR (1) BR8107117A (en)
FR (1) FR2493585A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071952A1 (en) * 1981-08-05 1983-02-16 CERAVER Société anonyme dite: Tie to hold an electrical conductor in the lateral groove of a rigid insulator
EP0090881A1 (en) * 1982-04-06 1983-10-12 CERAVER Société anonyme dite: Tie to hold an electrical cable in the upper groove of a rigid insulator
US7674982B2 (en) 2008-01-29 2010-03-09 Bmc Innovation Inc. Electric cable and insulator self-locking system, and method of installation thereof
USD894125S1 (en) * 2019-05-20 2020-08-25 Electrical Materials Company Insulator pin for overhead electrical lines
US11004579B2 (en) 2019-05-20 2021-05-11 Electrical Materials Company Breakaway pin for overhead electrical lines

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE232403C (en) *
FR701473A (en) * 1930-08-30 1931-03-17 Fastening clips for electrical conductors of all diameters on insulators of any type
FR41450E (en) * 1932-03-01 1933-01-10 Fastening clips for electrical conductors of all diameters on insulators of any type
DE654208C (en) * 1935-11-14 1937-12-14 Gerhard Opitz Bracket for attaching overhead lines to insulators using binding wire
FR899889A (en) * 1942-08-13 1945-06-13 Fides Gmbh Device for fixing electrical conductors to standard form support insulators
DE1912219A1 (en) * 1968-03-25 1969-10-02 Preformed Line Products Co Device for fastening linear elements, such as in particular cables or electrical lines and the like.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE232403C (en) *
FR701473A (en) * 1930-08-30 1931-03-17 Fastening clips for electrical conductors of all diameters on insulators of any type
FR41450E (en) * 1932-03-01 1933-01-10 Fastening clips for electrical conductors of all diameters on insulators of any type
DE654208C (en) * 1935-11-14 1937-12-14 Gerhard Opitz Bracket for attaching overhead lines to insulators using binding wire
FR899889A (en) * 1942-08-13 1945-06-13 Fides Gmbh Device for fixing electrical conductors to standard form support insulators
DE1912219A1 (en) * 1968-03-25 1969-10-02 Preformed Line Products Co Device for fastening linear elements, such as in particular cables or electrical lines and the like.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071952A1 (en) * 1981-08-05 1983-02-16 CERAVER Société anonyme dite: Tie to hold an electrical conductor in the lateral groove of a rigid insulator
EP0090881A1 (en) * 1982-04-06 1983-10-12 CERAVER Société anonyme dite: Tie to hold an electrical cable in the upper groove of a rigid insulator
US7674982B2 (en) 2008-01-29 2010-03-09 Bmc Innovation Inc. Electric cable and insulator self-locking system, and method of installation thereof
USD894125S1 (en) * 2019-05-20 2020-08-25 Electrical Materials Company Insulator pin for overhead electrical lines
US11004579B2 (en) 2019-05-20 2021-05-11 Electrical Materials Company Breakaway pin for overhead electrical lines

Also Published As

Publication number Publication date
FR2493585A1 (en) 1982-05-07
FR2493585B1 (en) 1983-09-09
BR8107117A (en) 1982-07-20

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