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EP0074985B1 - Device for twisting a binding metal wire - Google Patents

Device for twisting a binding metal wire Download PDF

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Publication number
EP0074985B1
EP0074985B1 EP82900962A EP82900962A EP0074985B1 EP 0074985 B1 EP0074985 B1 EP 0074985B1 EP 82900962 A EP82900962 A EP 82900962A EP 82900962 A EP82900962 A EP 82900962A EP 0074985 B1 EP0074985 B1 EP 0074985B1
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EP
European Patent Office
Prior art keywords
wire
head
wireguide
twist
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82900962A
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German (de)
French (fr)
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EP0074985A1 (en
Inventor
René GRENON
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Individual
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Individual
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Publication date
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Publication of EP0074985A1 publication Critical patent/EP0074985A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/24—Securing ends of binding material
    • B65B13/28—Securing ends of binding material by twisting

Definitions

  • the invention relates to a device for twisting the two end parts of a metal wire used as a ligating means.
  • these devices include clamps for holding the ends of the tying thread which are placed beyond the twist relative to the linked object so that the execution of the twist often leads to an elongation of this wire, elongation which can be excessive, which can cause necking and further decrease the resistance.
  • the tying yarn used necessarily has a length greater than the value strictly necessary to perform the twist itself.
  • a device for twisting the two end parts of a wire serving as a link around an object comprising a grooved wire guide with a fixed part containing a rotary twisting head having two opposite inclined passages starting from the lateral face of this head in extension of the groove in a position for stopping said head
  • two opposite clamps are arranged to immobilize respectively the end parts of the wire in the wire guide near the head and the latter has a hollow central clearance open towards the inside of the wire guide, into which the opposite inclined passages open, this central clearance having an interior configuration suitable for the twist to be produced.
  • a stopper is arranged opposite the external orifice of a passage and a shearing means is arranged symmetrically in correspondence with the external orifice of the opposite passage.
  • the length of the passages is determined so that the wire is sheared to the exact length necessary for making the twist.
  • the shearing means is constituted by a fixed part of the wire guide in which a wire guide channel is drilled in extension of the corresponding passage and each clamp respectively comprises on the one hand the part fixed wire guide, on the other hand a movable jaw adapted to immobilize the wire in the groove of the wire guide.
  • the hollow central clearance is terminated by a transverse flat bottom to a depth equal to the length of the desired twist and it is cylindrical with a diameter equal to that of the completed twist;
  • the inclined passages are widened in the direction of the wire guide before reaching the central clearance by internal clearances which allow the end portions of the wire to be put in a transverse plane when they are applied against the transverse flat bottom;
  • the central clearance is enlarged on the side of each passage in a direction opposite to the direction of rotation of the head by a lateral clearance whose bottom starts from the level of the transverse flat bottom and rises in the direction of the thread guide. so as to push back each free end part of the wire to wind it in the opposite direction.
  • a device comprises a single part of revolution constituted by a twisting head 1, constructed symmetrically, having two inclined cylindrical passages 2 and 3, a central hollow recess 4, a conical outer part 5, two disengages elements 6 and 7 internal to channels 2 and 3, and two clearances 8 and 9 which have raised surfaces 10 and 11 as a background.
  • This twisting head is associated on one side with an external stop 12 situated opposite one of the cylindrical passages 2 and with a fixed shearing means 13 intended to cooperate with the end of the other passage 3.
  • a known thread guide 19 ensures the continuity of a guide circuit around the object to be bound S, while a known external driving member 20 is used to push the binding thread 21 which is sometimes shown, for the sake of clarity. drawing, by a simple mixed line.
  • the front end of the binding wire is at the level of the shears and the object to be tied S is inside the wire guide 19; the twisting head 1 is stopped at a position which ensures the continuity of the guide of the wire through the passage 3, the wire guide 19 and the passage 2.
  • the drive member 20 pushes the binding wire 21 in the passage 3, then in the clamp 17, in the thread guide 19, in the clamp 18 and in the passage 2.
  • the thread stops against the stop 12.
  • the clamp 18 closes and retains the binding wire 21 while the motor member 20 reverses in rotation and clamps the object to be tied S by pulling on the binding wire 21.
  • a further progression of the rotation of the twisting head 1 causes the arrival of the end portions 28 and 29 of the binding wire on the raised surfaces 10 and 11; these end portions are then raised in the direction of the beginning of the twist 27. This results in an inversion of the direction of progression of the twist so that a second layer covers the first winding.
  • the twisting in progress then takes the configuration of FIG. 5.
  • the continuation of the rotation of the twisting head 1 causes the complete winding of the end portions 28 and 29 which come to end against the portions 31 and 32 of the binding wire 21 surrounding the object to be linked S.
  • the completed twist then has the configuration of Figures 6a, 6b, 6c. It has only a slight relief compared to the circled object and it only has rounded surfaces terminated by an extreme flat face.
  • Such a twist combines excellent presentation with good solidity due to its two superimposed windings.
  • the device necessary for its execution comprises only the following three mobile elements: the twisting head 1 and the two clamps 17 and 18.
  • the passages 2 and 3 are inclined symmetrically so as to be substantially in the direction of the wire guide 19.
  • Each passage 2, 3 has an external orifice opening in the lateral face of the head 1.
  • the external orifice of the passage 2 opposite the drive member 20 is very close to the fixed external stop 12 while the external orifice of the passage 3 on the side of the motor member 20 is in the extension of a channel 33 drilled in a fixed part 19B of the wire guide 19 to constitute the shearing means 13.
  • This channel 33 also serves to guide the wire 21 coming from the motor member 20 feeding the wire 21.
  • the latter is sheared, from the start of the rotation of the head 1, as a result of the movement of the passage 3 relative to the channel 33.
  • the passages 2 and 3 have a determined length so that the wire is sheared exactly to the length necessary to achieve the twist visible in Figure 6a. There is no extra length to cut later and the finished twist does not have to be folded.
  • the inclined passages 2, 3 open into a hollow central clearance 4, the bottom 30 of which is flat, that is to say located in a plane perpendicular to the axis of rotation of the head 1.
  • the central clearance 4 is open in the direction of the interior of the wire guide 19, that is to say towards the object S to be tied.
  • the passages 2, 3 are widened, in the direction of the wire guide 19 and of the object S to be linked by the internal clearances 6, 7. These allow the wire to be completely placed in a transverse plane, as soon as it left the inclined parts which made it possible to initiate the twist. This situation is illustrated in Figure 3a.
  • the transverse flat bottom 30 gives the wire the flat end face of the twist, as seen in Figure 4a. It is therefore clear that the depth of the central clearance 4 is equal to the length of the desired twist.
  • the central clearance 4 is enlarged on the side of each passage 2, 3, in a direction opposite to the direction of rotation of the head 1, by lateral clearances 8, 9.
  • the latter In the radial direction, the latter have a length at least equal to that of the free end portions 23, 24 of the wire 21 after they have been laid flat transversely, as explained above and as seen in FIG. 4b.
  • FIG. 8 shows that each lateral clearance 8, 9 has a bottom which leaves from the level of the bottom 30 of the central clearance 4 and which then rises progressively in the direction of the thread guide 19 and of the object S to be tied.
  • Each bottom 10, 11 is raised so as to push the free end portion 28, 29 of the wire in the opposite direction from the first winding.
  • Each end part 28, 29 is pushed back as soon as the wire 21 is completely withdrawn, due to its winding, the internal clearances 6, 7 of the passages 2, 3.
  • FIG. 4b shows the wire just when the lifting is going to take place. produce. Continued rotation causes, as has been said, a final winding in the opposite direction (FIGS. 5a, 5b) until the final configuration of FIGS. 6a to 6c.
  • the central clearance 4 is cylindrical, with a diameter which is equal to that of the completed twist measured on the second inverted winding ( Figures 6b or 6c). Consequently, when the twist is finished, the head 1 could rotate indefinitely, without risk of breaking or even of additional tension of the wire 21.
  • FIG. 1 shows that each clamp 17, 18 comprises a body 34 which constitutes a fixed part 19A, 19B of the wire guide 19 in which a guide groove 35 is hollowed out (FIG. 7).
  • a movable jaw 36 is pivotally mounted about a radial axis 37.
  • Each jaw is shaped to end in a spout 36 'locally constituting a wall of the groove 35 which is open towards the object to be strapped as is known.
  • a spring plunger 38 acting in the opening direction
  • a jack 40 with a push rod 41 acting in the closing direction.
  • On the fixed part of the wire guide 19, each jaw 36 is located as close as possible to the rotating head 1. In the closed position of the jaws 36, the wire 21 is strongly clamped in the groove 35 and immobilized against any slippage, the fixed part of the wire guide serving as the second jaw of the pliers.
  • the movable jaw 36A (FIG. 1) of the clamp 17 has a lateral surface which is arranged very close to the head 1 so that this surface serves as a stop 12 for stopping the wire 21.
  • the existence and location of the clamps 17, 18 is an essential characteristic; thanks to it the twist is made on the free end parts of the wire without variation of the tension of the latter.
  • the twist could be made in any desired manner by means of an appropriate corresponding interior configuration of the central clearance 4 into which the passages 2, 3 open.
  • the configuration described above is preferred because it gives a particularly advantageous twist. It is clear that, from the teaching provided by the invention, the person skilled in the art could easily adapt any other configuration of the interior clearance of the head, without however departing from the scope of the invention, with a view to '' get another type of twist.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Ropes Or Cables (AREA)
  • Wire Processing (AREA)

Abstract

Two pliers (17, 18) are arranged to clamp and hold the wire in the throat of the wire guide (19) at the vicinity of the rotary head (1) which is associated to a stop (12) for stopping the wire and to a shearing means (13) and which has a central clearing (4) open in the direction of the object (S) to the bound in which inclined radial passages (2, 3) for the wire open, of which the ends are twisted during the rotation of the head (1) to form a twist of which the configuration is imposed by the inner configuration of said central clearing (4).

Description

L'invention a pour objet un dispositif servant à torsader les deux parties extrêmes d'un fil métallique utilisé comme moyen de ligature.The invention relates to a device for twisting the two end parts of a metal wire used as a ligating means.

On connaît déjà de nombreux dispositifs ayant le même rôle. L'état de la technique peut être illustré dans ce domaine par les brevets suivants : DE 1 511 828-US 3 470 813-US 4 252 157-FR 1 576 602.We already know many devices having the same role. The state of the art can be illustrated in this area by the following patents: DE 1,511,828-US 3,470 813-US 4,252,157-FR 1,576,602.

Avec la plupart des dispositifs connus, au moment du torsadage, les contraintes dans les deux extrémités du fil de liage sont différentes ce qui provoque une dissymétrie de la torsade et une diminution de la résistance. D'autre part, ces dispositifs comprennent des pinces de maintien des extrémités du fil de liage qui sont placées au-delà de la torsade par rapport à l'objet lié de telle sorte que l'exécution de la torsade conduit souvent à un allongement de ce fil, allongement qui peut être excessif, qui peut provoquer une striction et diminuer encore la résistance.With most of the known devices, at the time of twisting, the stresses at the two ends of the binding wire are different, which causes asymmetry of the twist and a reduction in resistance. On the other hand, these devices include clamps for holding the ends of the tying thread which are placed beyond the twist relative to the linked object so that the execution of the twist often leads to an elongation of this wire, elongation which can be excessive, which can cause necking and further decrease the resistance.

En outre, comme les extrémités sont tenues dans les pinces, il est nécessaire de les rabattre ensuite contre l'objet lié, après exécution de la torsade.In addition, as the ends are held in the clamps, it is necessary to then fold them back against the linked object, after execution of the twist.

Enfin, le fil de liage utilisé a nécessairement une longueur supérieure à la valeur strictement nécessaire pour effectuer la torsade elle-même.Finally, the tying yarn used necessarily has a length greater than the value strictly necessary to perform the twist itself.

Le but principal de l'invention est d'apporter un dispositif qui exécute une torsade des deux extrémités d'un lien métallique sans imposer d'allongement supplémentaire à ce fil, en utilisant la longueur de fil strictement nécessaire, et qui supprime toute nécessité de rabattre les extrémités du fil torsadé ou de rabattre la torsade elle-même.The main object of the invention is to provide a device which twists the two ends of a metal link without imposing additional elongation on this wire, using the length of wire strictly necessary, and which eliminates any need for fold the ends of the twisted wire or fold the twist itself.

Dans un dispositif pour torsader les deux parties extrêmes d'un fil servant de lien autour d'un objet, comprenant un guide-fil à gorge avec une partie fixe contenant une tête de torsadage rotative ayant deux passages inclinés opposés partant de la face latérale de cette tête en prolongement de la gorge dans une position d'arrêt de ladite tête, selon l'invention deux pinces opposées sont disposées pour immobiliser respectivement les parties extrêmes du fil dans le guide-fil à proximité de la tête et celle-ci présente un dégagement central creux ouvert en direction de l'intérieur du guide-fil, dans lequel débouchent les passages inclinés opposés, ce dégagement central ayant une configuration intérieure appropriée à la torsade à réaliser.In a device for twisting the two end parts of a wire serving as a link around an object, comprising a grooved wire guide with a fixed part containing a rotary twisting head having two opposite inclined passages starting from the lateral face of this head in extension of the groove in a position for stopping said head, according to the invention two opposite clamps are arranged to immobilize respectively the end parts of the wire in the wire guide near the head and the latter has a hollow central clearance open towards the inside of the wire guide, into which the opposite inclined passages open, this central clearance having an interior configuration suitable for the twist to be produced.

Une butée est disposée en face de l'orifice extérieur d'un passage et un moyen de cisaillage est disposé symétriquement en correspondance avec l'orifice extérieur du passage opposé.A stopper is arranged opposite the external orifice of a passage and a shearing means is arranged symmetrically in correspondence with the external orifice of the opposite passage.

De préférence, la longueur des passages est déterminée pour que le fil soit cisaillé à la longueur exacte nécessaire à la confection de la torsade.Preferably, the length of the passages is determined so that the wire is sheared to the exact length necessary for making the twist.

Selon un mode de réalisation de l'invention, le moyen de cisaillage est constitué par une partie fixe du guide-fil dans laquelle est foré un canal de guidage du fil en prolongement du passage correspondant et chaque pince comprend respectivement d'une part la partie fixe du guide-fil, d'autre part une mâchoire mobile apte à immobiliser le fil dans la gorge du guide-fil.According to one embodiment of the invention, the shearing means is constituted by a fixed part of the wire guide in which a wire guide channel is drilled in extension of the corresponding passage and each clamp respectively comprises on the one hand the part fixed wire guide, on the other hand a movable jaw adapted to immobilize the wire in the groove of the wire guide.

Dans un mode de réalisation préféré de l'invention, le dégagement central creux est terminé par un fond plat transversal à une profondeur égale à la longueur de la torsade désirée et il est cylindrique avec un diamètre égal à celui de la torsade terminée ; les passages inclinés sont élargis en direction du guide-fil avant d'atteindre le dégagement central par des dégagements internes qui permettent aux parties extrêmes du fil de se mettre dans un plan transversal quand elles sont appliquées contre le fond plat transversal ; en outre, le dégagement central est agrandi sur le côté de chaque passage dans un sens opposé au sens de rotation de la tête par un dégagement latéral dont le fond part du niveau du fond plat transversal et s'élève en direction du guide-fil de façon à repousser chaque partie extrême libre du fil pour l'enrouler en sens inverse.In a preferred embodiment of the invention, the hollow central clearance is terminated by a transverse flat bottom to a depth equal to the length of the desired twist and it is cylindrical with a diameter equal to that of the completed twist; the inclined passages are widened in the direction of the wire guide before reaching the central clearance by internal clearances which allow the end portions of the wire to be put in a transverse plane when they are applied against the transverse flat bottom; in addition, the central clearance is enlarged on the side of each passage in a direction opposite to the direction of rotation of the head by a lateral clearance whose bottom starts from the level of the transverse flat bottom and rises in the direction of the thread guide. so as to push back each free end part of the wire to wind it in the opposite direction.

On donnera maintenant, sans intention limitative, une description d'un exemple préféré de réalisation de l'invention. On se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue en coupe suivant I-I de la figure 2 d'un dispositif de torsadage conforme à l'invention,
  • la figure 2 est une vue dans l'axe de la tête de torsadage, suivant la flèche B de la figure 1, les pinces n'étant pas représentées,
  • les figures 3a et 3b sont des vues montrant la position du fil après une rotation de l'organe de torsadage d'environ un demi-tour,
  • les figures 4a et 4b sont des vues analogues après une rotation d'environ trois quarts de tour,
  • les figures 5a et 5b sont des vues analogues après une rotation d'environ un tour,
  • les figures 6a à 6c montrent la torsade terminée respectivement de côté, de dessous et de dessus,
  • la figure 7 est une vue en coupe selon VII-VII de la figure 1 montrant une mâchoire d'une pince de retenue du fil,
  • la figure est une vue de détail en coupe selon VIII-VIII de la figure 2 montrant une surface relevée.
A description will now be given, without any limiting intention, of a preferred embodiment of the invention. Reference is made to the appended drawings in which:
  • FIG. 1 is a sectional view along II of FIG. 2 of a twisting device according to the invention,
  • FIG. 2 is a view in the axis of the twisting head, along the arrow B in FIG. 1, the clamps not being shown,
  • FIGS. 3a and 3b are views showing the position of the wire after a rotation of the twisting member of about half a turn,
  • FIGS. 4a and 4b are similar views after a rotation of approximately three quarters of a turn,
  • FIGS. 5a and 5b are similar views after a rotation of around one revolution,
  • FIGS. 6a to 6c show the twist completed respectively from the side, from below and from above,
  • FIG. 7 is a sectional view along VII-VII of FIG. 1 showing a jaw of a wire retaining clamp,
  • the figure is a detail view in section along VIII-VIII of Figure 2 showing a raised surface.

Pour une meilleure compréhension de la constitution du dispositif de l'invention, il est préférable d'en donner maintenant une description sommaire suivie d'une explication de son mode de fonctionnement. Ainsi apparaîtra mieux la raison de certains détails de construction qui sont décrits complètement plus loin.For a better understanding of the constitution of the device of the invention, it is preferable to now give a summary description followed by an explanation of its mode of operation. This will make it easier to see the reason for certain construction details which are described completely below.

Un dispositif conforme à l'invention comprend une unique pièce de révolution constituée par une tête de torsadage 1, construite symétriquement, présentant deux passages cylindriques inclinés 2 et 3, un dégagement central en creux 4, une partie extérieure conique 5, deux dégagements 6 et 7 internes aux canaux 2 et 3, et deux dégagements 8 et 9 qui ont comme fond des surfaces relevées 10 et 11.A device according to the invention comprises a single part of revolution constituted by a twisting head 1, constructed symmetrically, having two inclined cylindrical passages 2 and 3, a central hollow recess 4, a conical outer part 5, two disengages elements 6 and 7 internal to channels 2 and 3, and two clearances 8 and 9 which have raised surfaces 10 and 11 as a background.

Cette tête de torsadage est associée d'un côté à une butée extérieure 12 située en face de l'un des passages cylindriques 2 et à un moyen fixe 13 de cisaillage destiné à coopérer avec l'extrémité de l'autre passage 3.This twisting head is associated on one side with an external stop 12 situated opposite one of the cylindrical passages 2 and with a fixed shearing means 13 intended to cooperate with the end of the other passage 3.

La pièce 1 est maintenue en place dans un bâti 14 par deux paliers 15 et entraînée en rotation par un moyen extérieur connu 16. Deux pinces indépendantes et symétriques 17 et 18 font aussi partie du dispositif, chacune pouvant maintenir en position l'une des parties extrêmes du fil. On en donnera plus loin une description détaillée.The part 1 is held in place in a frame 14 by two bearings 15 and driven in rotation by known external means 16. Two independent and symmetrical clamps 17 and 18 also form part of the device, each being able to hold in position one of the parts ends of the wire. A detailed description will be given below.

Un guide-fil connu 19 assure la continuité d'un circuit de guidage autour de l'objet à lier S, tandis qu'un organe moteur extérieur connu 20 sert à pousser le fil de liage 21 qui est parfois représenté, pour la clarté du dessin, par un simple trait mixte.A known thread guide 19 ensures the continuity of a guide circuit around the object to be bound S, while a known external driving member 20 is used to push the binding thread 21 which is sometimes shown, for the sake of clarity. drawing, by a simple mixed line.

Au départ, l'extrémité avant du fil de liage se trouve au niveau de la cisaille et l'objet à lier S est à l'intérieur du guide-fil 19 ; la tête de torsadage 1 est arrêtée à une position qui assure la continuité du guidage du fil par le passage 3, le guide-fil 19 et le passage 2.At the start, the front end of the binding wire is at the level of the shears and the object to be tied S is inside the wire guide 19; the twisting head 1 is stopped at a position which ensures the continuity of the guide of the wire through the passage 3, the wire guide 19 and the passage 2.

L'organe moteur 20 pousse le fil de liage 21 dans le passage 3, puis dans la pince 17, dans le guide-fil 19, dans la pince 18 et dans le passage 2. Le fil s'arrête contre la butée 12.The drive member 20 pushes the binding wire 21 in the passage 3, then in the clamp 17, in the thread guide 19, in the clamp 18 and in the passage 2. The thread stops against the stop 12.

La pince 18 se ferme et retient le fil de liage 21 tandis que l'organe moteur 20 s'inverse en rotation et serre l'objet à lier S en tirant sur le fil de liage 21.The clamp 18 closes and retains the binding wire 21 while the motor member 20 reverses in rotation and clamps the object to be tied S by pulling on the binding wire 21.

En fin de serrage la pince 17 se ferme et retient le fil de liage 21. L'organe moteur 20 s'arrête et la tête de torsadage 1 commence sa rotation. Le fil de liage est sectionné aussitôt entre la lame fixe 13 et l'arête extérieure 22 du passage 3. La rotation de la tête 1 se poursuit et les deux parties extrêmes libres 23 et 24 du fil de liage commencent à s'enrouler l'une autour de l'autre, la longueur nécessaire étant obtenue par le coulissement axial de ces parties extrêmes du fil 21 qui rentrent dans les passages 2 et 3.At the end of tightening, the clamp 17 closes and retains the binding wire 21. The drive member 20 stops and the twisting head 1 begins to rotate. The tying wire is immediately cut between the fixed blade 13 and the outer edge 22 of the passage 3. The rotation of the head 1 continues and the two free end portions 23 and 24 of the tying wire begin to wind the one around the other, the necessary length being obtained by the axial sliding of these end portions of the wire 21 which enter the passages 2 and 3.

Après une partie de la rotation, les parties rectilignes 23 et 24 pivotent autour des angles 25 et 26 des canaux 2 et 3, sous l'effet de la progression de la première partie de la torsade 27, les parties extrêmes 28 et 29 des parties 23 et 24 se logeant dans les dégagements internes 6 et 7. A ce moment la torsade 27 touche le fond 30 du dégagement central 4 et la torsade en cours a la configuration de la figure 3. La progression de la rotation de la tête de torsadage 1 oblige le fil à s'enrouler en spirale autour de la première partie de la torsade 27 parallèlement au fond 30 du dégagement 4, les dégagements 8 et 9 permettant l'orientation des extrémités 23 et 24 du fil de liage dans le plan de la partie en spirale de la torsade. La torsade en cours a alors la configuration de la figure 4.After part of the rotation, the straight parts 23 and 24 pivot around the angles 25 and 26 of the channels 2 and 3, under the effect of the progression of the first part of the twist 27, the end parts 28 and 29 of the parts 23 and 24 being housed in the internal clearances 6 and 7. At this moment the twist 27 touches the bottom 30 of the central clearance 4 and the twist in progress has the configuration of FIG. 3. The progression of the rotation of the twisting head 1 forces the wire to wind in a spiral around the first part of the twist 27 parallel to the bottom 30 of the clearance 4, the clearances 8 and 9 allowing the orientation of the ends 23 and 24 of the binding wire in the plane of the spiral part of the twist. The current twist then has the configuration of Figure 4.

Une nouvelle progression de la rotation de la tête de torsadage 1 provoque l'arrivée des parties extrêmes 28 et 29 du fil de liage sur les surfaces relevées 10 et 11 ; ces parties extrêmes sont alors relevées en direction du début de la torsade 27. Il en résulte une inversion du sens de progression de la torsade de sorte qu'une seconde couche recouvre le premier enroulement. La torsade en cours prend alors la configuration de la figure 5. La poursuite de la rotation de la tête de torsadage 1 provoque l'enroulement complet des parties extrêmes 28 et 29 qui viennent se terminer contre les parties 31 et 32 du fil de liage 21 entourant l'objet à lier S.A further progression of the rotation of the twisting head 1 causes the arrival of the end portions 28 and 29 of the binding wire on the raised surfaces 10 and 11; these end portions are then raised in the direction of the beginning of the twist 27. This results in an inversion of the direction of progression of the twist so that a second layer covers the first winding. The twisting in progress then takes the configuration of FIG. 5. The continuation of the rotation of the twisting head 1 causes the complete winding of the end portions 28 and 29 which come to end against the portions 31 and 32 of the binding wire 21 surrounding the object to be linked S.

La torsade terminée a alors la configuration des figures 6a, 6b, 6c. Elle n'a qu'un faible relief par rapport à l'objet cerclé et elle ne présente que des surfaces arrondies terminées par une face extrême plane.The completed twist then has the configuration of Figures 6a, 6b, 6c. It has only a slight relief compared to the circled object and it only has rounded surfaces terminated by an extreme flat face.

Une telle torsade allie à une excellente présentation une bonne solidité du fait de ses deux enroulements superposés.Such a twist combines excellent presentation with good solidity due to its two superimposed windings.

Le dispositif nécessaire à son exécution ne comprend que les trois éléments mobiles suivants : la tête de torsadage 1 et les deux pinces 17 et 18.The device necessary for its execution comprises only the following three mobile elements: the twisting head 1 and the two clamps 17 and 18.

On comprendra plus facilement maintenant la description détaillée de ces trois éléments.The detailed description of these three elements will now be more easily understood.

Dans la tête 1, les passages 2 et 3 sont inclinés symétriquement pour se trouver sensiblement dans la direction du guide-fil 19. Chaque passage 2, 3 a un orifice extérieur s'ouvrant dans la face latérale de la tête 1.In the head 1, the passages 2 and 3 are inclined symmetrically so as to be substantially in the direction of the wire guide 19. Each passage 2, 3 has an external orifice opening in the lateral face of the head 1.

A la position normale d'arrêt de la tête 1, l'orifice extérieur du passage 2 opposé à l'organe moteur 20 se trouve très près de la butée extérieure fixe 12 tandis que l'orifice extérieur du passage 3 du côté de l'organe moteur 20 se trouve dans le prolongement d'un canal 33 foré dans une partie fixe 19B du guide-fil 19 pour constituer le moyen de cisaillage 13. Ce canal 33 sert aussi à guider le fil 21 en provenance de l'organe moteur 20 d'alimentation du fil 21. Ce dernier est cisaillé, dès le début de la rotation de la tête 1, par suite du déplacement du passage 3 par rapport au canal 33. Les passages 2 et 3 ont une longueur déterminée pour que le fil soit cisaillé exactement à la longueur nécessaire à la réalisation de la torsade visible sur la figure 6a. Il n'y a aucune surlongueur à couper par la suite et la torsade terminée n'a pas à être repliée.At the normal stop position of the head 1, the external orifice of the passage 2 opposite the drive member 20 is very close to the fixed external stop 12 while the external orifice of the passage 3 on the side of the motor member 20 is in the extension of a channel 33 drilled in a fixed part 19B of the wire guide 19 to constitute the shearing means 13. This channel 33 also serves to guide the wire 21 coming from the motor member 20 feeding the wire 21. The latter is sheared, from the start of the rotation of the head 1, as a result of the movement of the passage 3 relative to the channel 33. The passages 2 and 3 have a determined length so that the wire is sheared exactly to the length necessary to achieve the twist visible in Figure 6a. There is no extra length to cut later and the finished twist does not have to be folded.

A l'intérieur de la tête 1, les passages inclinés 2, 3 débouchent dans un dégagement central creux 4 dont le fond 30 est plat, c'est-à-dire situé dans un plan perpendiculaire à l'axe de rotation de la tête 1. A l'opposé de son fond 30, le dégagement central 4 est ouvert en direction de l'intérieur du guide-fil 19, c'est-à-dire vers l'objet S à lier. Avant d'atteindre le dégagement central 4, les passages 2, 3 sont élargis, en direction du guide-fil 19 et de l'objet S à lier par les dégagements internes 6, 7. Ces derniers permettent au fil de se mettre totalement dans un plan transversal, dès qu'il a quitté les parties inclinées qui ont permis d'amorcer la torsade. Cette situation est illustrée par la figure 3a. Le fond plat transversal 30 donne au fil la face extrême terminale plane de la torsade, comme on le voit sur la figure 4a. Il est donc clair que la profondeur du dégagement central 4 est égale à la longueur de la torsade désirée.Inside the head 1, the inclined passages 2, 3 open into a hollow central clearance 4, the bottom 30 of which is flat, that is to say located in a plane perpendicular to the axis of rotation of the head 1. Opposite its bottom 30, the central clearance 4 is open in the direction of the interior of the wire guide 19, that is to say towards the object S to be tied. Before reaching the central clearance 4, the passages 2, 3 are widened, in the direction of the wire guide 19 and of the object S to be linked by the internal clearances 6, 7. These allow the wire to be completely placed in a transverse plane, as soon as it left the inclined parts which made it possible to initiate the twist. This situation is illustrated in Figure 3a. The transverse flat bottom 30 gives the wire the flat end face of the twist, as seen in Figure 4a. It is therefore clear that the depth of the central clearance 4 is equal to the length of the desired twist.

Le dégagement central 4 est agrandi sur le côté de chaque passage 2, 3, dans un sens opposé au sens de rotation de la tête 1, par des dégagements latéraux 8, 9. En sens radial, ces derniers ont une longueur au moins égale à celle des parties extrêmes libres 23, 24 du fil 21 après leur mise à plat transversalement, comme expliqué plus haut et comme on le voit sur la figure 4b.The central clearance 4 is enlarged on the side of each passage 2, 3, in a direction opposite to the direction of rotation of the head 1, by lateral clearances 8, 9. In the radial direction, the latter have a length at least equal to that of the free end portions 23, 24 of the wire 21 after they have been laid flat transversely, as explained above and as seen in FIG. 4b.

La figure 8 montre que chaque dégagement latéral 8, 9 a un fond qui part du niveau du fond 30 du dégagement central 4 et qui s'élève ensuite progressivement en direction du guide-fil 19 et de l'objet S à lier. Chaque fond 10, 11 est relevé de façon à repousser la partie extrême libre 28, 29 du fil en sens inverse du premier enroulement. Chaque partie extrême 28, 29 est repoussée ainsi dès que le fil 21 est complètement retiré, du fait de son enroulement, des dégagements internes 6, 7 des passages 2, 3. La figure 4b montre le fil juste au moment où le relèvement va se produire. La poursuite de la rotation provoque comme on l'a dit un enroulement final en sens inverse (figures 5a, 5b) jusqu'à la configuration définitive des figures 6a à 6c.FIG. 8 shows that each lateral clearance 8, 9 has a bottom which leaves from the level of the bottom 30 of the central clearance 4 and which then rises progressively in the direction of the thread guide 19 and of the object S to be tied. Each bottom 10, 11 is raised so as to push the free end portion 28, 29 of the wire in the opposite direction from the first winding. Each end part 28, 29 is pushed back as soon as the wire 21 is completely withdrawn, due to its winding, the internal clearances 6, 7 of the passages 2, 3. FIG. 4b shows the wire just when the lifting is going to take place. produce. Continued rotation causes, as has been said, a final winding in the opposite direction (FIGS. 5a, 5b) until the final configuration of FIGS. 6a to 6c.

A l'exception des dégagements latéraux 8, 9, le dégagement central 4 est cylindrique, avec un diamètre qui est égal à celui de la torsade terminée mesuré sur le second enroulement inversé (figures 6b ou 6c). Par conséquent, quand la torsade est terminée, la tête 1 pourrait tourner indéfiniment, sans risque de rupture ni même de tension supplémentaire du fil 21.With the exception of the lateral clearances 8, 9, the central clearance 4 is cylindrical, with a diameter which is equal to that of the completed twist measured on the second inverted winding (Figures 6b or 6c). Consequently, when the twist is finished, the head 1 could rotate indefinitely, without risk of breaking or even of additional tension of the wire 21.

Ce résultat s'obtient parce que la tête 1 enroule en torsade uniquement les parties extrêmes libres du fil coupé exactement à la longueur voulue, pendant que la tension de serrage autour de l'objet S est maintenue par les pinces 17, 18.This result is obtained because the head 1 twists only the free end parts of the cut wire exactly to the desired length, while the tightening tension around the object S is maintained by the clamps 17, 18.

La figure 1 montre que chaque pince 17, 18 comprend un corps 34 qui constitue une partie fixe 19A, 19B du guide-fil 19 dans laquelle est creusée une gorge de guidage 35 (fig.7). A proximité de la tête 1, de part et d'autre de celle-ci, une mâchoire mobile 36 est montée pivotante autour d'un axe radial 37. Chaque mâchoire est conformée pour se terminer par un bec 36' constituant localement une paroi de la gorge 35 qui est ouverte vers l'objet à cercler ainsi qu'il est connu. A cette mâchoire 36 sont associés un poussoir 38 à ressort 39 agissant dans le sens de l'ouverture et un vérin 40 à tige de poussée 41 agissant dans le sens de la fermeture. Sur la partie fixe du guide-fil 19, chaque mâchoire 36 est située aussi près que possible de la tête tournante 1. En position de fermeture des mâchoires 36, le fil 21 est fortement serré dans la gorge 35 et immobilisé contre tout glissement, la partie fixe du guide-fil servant de seconde mâchoire de la pince.FIG. 1 shows that each clamp 17, 18 comprises a body 34 which constitutes a fixed part 19A, 19B of the wire guide 19 in which a guide groove 35 is hollowed out (FIG. 7). Near the head 1, on either side thereof, a movable jaw 36 is pivotally mounted about a radial axis 37. Each jaw is shaped to end in a spout 36 'locally constituting a wall of the groove 35 which is open towards the object to be strapped as is known. With this jaw 36 are associated a spring plunger 38 acting in the opening direction and a jack 40 with a push rod 41 acting in the closing direction. On the fixed part of the wire guide 19, each jaw 36 is located as close as possible to the rotating head 1. In the closed position of the jaws 36, the wire 21 is strongly clamped in the groove 35 and immobilized against any slippage, the fixed part of the wire guide serving as the second jaw of the pliers.

Quand le fil mis en place autour de l'objet S à lier est serré dans la pince 18, à proximité de la tête 1, du côté du canal 33, on peut régler exactement la tension du fil 21, grâce à une marche en arrière de l'organe moteur 20. La fermeture de la seconde pince 17 du côté de la butée 12 d'arrivée du fil 21 maintient ce dernier à la tension qui lui a été donnée. Cette tension est conservée pendant la confection de la torsade, qui n'intéresse que les parties extrêmes libres du fil, en dehors des pinces 17, 18 puisque celles-ci agissent sur le fil entre la tête 1 et l'objet S à lier.When the thread placed around the object S to be tied is clamped in the clamp 18, near the head 1, on the side of the channel 33, the tension of the thread 21 can be adjusted exactly, by means of a reverse movement. of the drive member 20. The closure of the second clamp 17 on the side of the stop 12 for the arrival of the wire 21 maintains the latter at the voltage which has been given to it. This tension is retained during the making of the twist, which only interests the free end portions of the wire, apart from the clamps 17, 18 since these act on the wire between the head 1 and the object S to be bound.

On remarquera que la mâchoire mobile 36A (fig. 1) de la pince 17 a une surface latérale qui est disposée très près de la tête 1 de sorte que cette surface sert de butée 12 d'arrêt du fil 21.It will be noted that the movable jaw 36A (FIG. 1) of the clamp 17 has a lateral surface which is arranged very close to the head 1 so that this surface serves as a stop 12 for stopping the wire 21.

L'existence et l'emplacement des pinces 17, 18 est une caractéristique essentielle ; grâce à elle la torsade se fait sur les parties extrêmes libres du fil sans variation de la tension de ce dernier. La torsade pourrait être faite de toute manière quelconque souhaitée au moyen d'une configuration intérieure correspondante appropriée du dégagement central 4 dans lequel débouchent les passages 2, 3. La configuration décrite plus haut est préférée parce qu'elle donne une torsade particulièrement avantageuse. Il est clair que, à partir de l'enseignement qu'apporte l'invention, l'homme du métier pourrait adapter facilement toute autre configuration du dégagement intérieur de la tête, sans sortir pour autant du cadre de l'invention, en vue d'obtenir un autre type de torsade.The existence and location of the clamps 17, 18 is an essential characteristic; thanks to it the twist is made on the free end parts of the wire without variation of the tension of the latter. The twist could be made in any desired manner by means of an appropriate corresponding interior configuration of the central clearance 4 into which the passages 2, 3 open. The configuration described above is preferred because it gives a particularly advantageous twist. It is clear that, from the teaching provided by the invention, the person skilled in the art could easily adapt any other configuration of the interior clearance of the head, without however departing from the scope of the invention, with a view to '' get another type of twist.

Claims (9)

1. A device for twisting together the two end portions (23, 24) of a wire (21) acting as a tie round an article (S), comprising a wireguide (19) having a groove (35) and with a fixed portion (19A, 19B) containing a rotary twisting-head (1) having two opposed inclined passages (2, 3) starting from the sideface of this head in prolongation of the groove (35) in a stopped position of the said head (1), characterized in that two opposite grips (17, 18) are arranged for holding the end portions of the wire (21) respectively immovable in the wireguide (19) close to the head (1) and the latter exhibits a hollow central clearance (4) which is open in the direction of the inside of the wireguide (19) and into which the opposed inclined passages (2, 3) open out, this central clearance (4) having an internal configuration suited to the twist joint which is to be produced.
2. A device as in Claim 1, characterized in that a stop (12) is arranged in front of the outer orifice from one passage (2) and a means of shearing (13) is arranged symmetrically in communication with the outer orifice from the opposite passage (3).
3. A device as in Claim 2, characterized in that the length of the passages (2, 3) is designed so that the wire (21) is sheared to the exact length necessary for the making of the twist joint.
4. A device as in Claim 2, characterized in that the means of shearing (13) consists of a fixed portion (19A) of the wireguide (19) in which is drilled a channel (33) for guidance of the wire (21) in prolongation of the corresponding passage (3).
5. A device as in Claim 1, characterized in that each grip (17, 18) respectively comprises firstly the fixed portion (19A, 19B) of the wireguide (19) and secondly a movable jaw (36, 36A) suitable for holding the wire (21) immovable in the groove (35) in the wireguide (19).
6. A device as in Claim 5, characterized in that one movable jaw (36A) has a surface at the side next to the head (1) to form the stop (12) for the wire (21).
7. A device as in Claim 1, characterized in that the hollow central clearance (4) ends in a flat transverse bottom (30) of a depth equal to the length of the twist joint desired and it is cylindrical with a diameter equal to that of the finished twist joint.
8. A device as in Claim 7, characterized in that the inclined passages (2, 3) are widened in the direction of the wireguide (19) before reaching the central clearance (4) by internal clearances (6, 7) which enable the end portions (23, 24) of the wire (21) to get into a transverse plane when they are pressed against the flat transverse bottom (30).
9. A device as in Claim 7, characterized in that the central clearance (4) is enlarged at the side of each passage (2, 3) in a direction opposite to the direction of rotation of the head (1) by a side clearance (8, 9) the bottom of which starts from the level of the flat transverse bottom and rises in the direction of the wireguide (19) so as to thrust back each free end portion (23, 24) of the wire (21) in order to wind it in the opposite direction.
EP82900962A 1981-03-26 1982-03-23 Device for twisting a binding metal wire Expired EP0074985B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8106106A FR2502582A1 (en) 1981-03-26 1981-03-26 TWISTING SYSTEM FOR METALLIC WIRES
FR8106106 1981-03-26

Publications (2)

Publication Number Publication Date
EP0074985A1 EP0074985A1 (en) 1983-03-30
EP0074985B1 true EP0074985B1 (en) 1984-08-15

Family

ID=9256679

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EP82900962A Expired EP0074985B1 (en) 1981-03-26 1982-03-23 Device for twisting a binding metal wire

Country Status (10)

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US (1) US4508030A (en)
EP (1) EP0074985B1 (en)
JP (1) JPS58500248A (en)
AU (1) AU552426B2 (en)
BR (1) BR8207245A (en)
DE (1) DE3260568D1 (en)
FR (1) FR2502582A1 (en)
IT (1) IT1151528B (en)
SU (1) SU1435148A3 (en)
WO (1) WO1982003368A1 (en)

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Also Published As

Publication number Publication date
DE3260568D1 (en) 1984-09-20
SU1435148A3 (en) 1988-10-30
WO1982003368A1 (en) 1982-10-14
IT1151528B (en) 1986-12-24
AU552426B2 (en) 1986-05-29
JPH0132085B2 (en) 1989-06-29
BR8207245A (en) 1983-03-01
FR2502582A1 (en) 1982-10-01
IT8220435A0 (en) 1982-03-26
JPS58500248A (en) 1983-02-17
EP0074985A1 (en) 1983-03-30
US4508030A (en) 1985-04-02
AU8272482A (en) 1982-10-19

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