EP0851048A1 - Selection device, three-position shedding mechanism and loom with such a shedding mechanism - Google Patents

Selection device, three-position shedding mechanism and loom with such a shedding mechanism Download PDF

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Publication number
EP0851048A1
EP0851048A1 EP97420222A EP97420222A EP0851048A1 EP 0851048 A1 EP0851048 A1 EP 0851048A1 EP 97420222 A EP97420222 A EP 97420222A EP 97420222 A EP97420222 A EP 97420222A EP 0851048 A1 EP0851048 A1 EP 0851048A1
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EP
European Patent Office
Prior art keywords
lever
magnetic
selection device
axis
electromagnets
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Granted
Application number
EP97420222A
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German (de)
French (fr)
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EP0851048B1 (en
Inventor
Dario Bassi
Damien Bouchet
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Staeubli Lyon SA
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Staeubli Lyon SA
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Publication of EP0851048A1 publication Critical patent/EP0851048A1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/20—Electrically-operated jacquards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/12—Multiple-shed jacquards, i.e. jacquards which move warp threads to several different heights, e.g. for weaving pile fabrics

Definitions

  • the invention relates to a selection device, to a Jacquard loom mechanics with three positions and one weaving loom equipped with such a weaving mechanism.
  • a weaving loom incorporating armor mechanics suitable for generating three positions of the chain wires is used for the production of special fabrics, such as velvet or carpet.
  • the invention aims to solve these problems and to propose a armor selection device with three positions, simple, therefore economical, able to operate at high speeds and low energy consumption. According to another aspect of the invention, it aims to provide a device for selection likely to work with hooks suitable for be moved in pairs, a first hook of each pair being in simple support on the second hook of this same pair.
  • the invention relates to a device for selection of three position armor mechanics including two superimposed electromagnets capable of being selectively activated, characterized in that it comprises at least one lever articulated around an axis integral with said device, said lever being provided with magnetic frames able to cooperate selectively with said electromagnets so as to generate three positions of said lever.
  • the lever can be placed, as desired, in one of these three positions which correspond to the three desired heights of warp looms in during operation.
  • the pivoting of the lever takes place without deformation of its constituent elements or hooks which it allows to select, which avoids fatigue mechanics of these elements.
  • the lever includes a non-magnetic structure in which are housed the magnetic plates.
  • This aspect of the invention allows to decouple the functioning of magnetic armatures and associated electromagnets.
  • at least one of the reinforcements is mobile with respect to the non-magnetic structure. This aspect of the invention gives the articulated lever a degree additional freedom when one of the reinforcements has a position fixed by its cooperation with the electromagnet at which it is associated.
  • an armature mobile with respect to the non-magnetic structure and this non-magnetic structure are articulated independently one of the other around the axis. This construction therefore allows angular displacement of a magnetic armature with respect to the non-magnetic structure.
  • the frame mobile is provided with a heel capable of transmitting to the non-magnetic structure a pivoting torque around this axis.
  • the non-magnetic structure is provided with a bar able to transmit a pivoting torque to the movable frame around the axis.
  • the lever includes an end adapted to penetrate selectively into a substantially horizontal opening of one or two movable hooks supporting a funicular element determining the position of minus a smooth of said armor mechanics.
  • the end of the lever thus constitutes a means of immobilizing the hooks of armor mechanics near the top dead center of their trajectory.
  • the end lever is able to be moved by one of the hooks when it comes close to the top dead center of its trajectory.
  • This aspect of the invention makes it possible to obtain the leveling of the position of the levers of the armor mechanics including a device according to the invention, which makes it possible to limit the power of electromagnets which do not have to move the levers, but only serve to maintain them selectively in position.
  • the invention also relates to a mechanical armor of Jacquard loom with three positions including a selection as previously described and a loom equipped with such armor mechanics.
  • the three armor mechanics selection device positions shown in Figure 1 is intended to immobilize, in the vicinity of the top dead center of their trajectory, two movable hooks 1 and 2 able to be moved by pressing on a knife 3 with vertical reciprocating movements.
  • These movable hooks 1 and 2 are respectively connected to a cord 4 or 5 constituting a funicular element allowing vertically move a pulley controlling the altitude of a smooth belonging to a Jacquard harness.
  • These hooks work in pairs, resting on each other as described in French patent application FR-96 12329 in the name of Applicant.
  • the mechanism includes two electromagnets superimposed 8 and 9 able to be selectively activated by means a control module not shown.
  • the lever 10 On both sides of the electromagnets 8 and 9 are arranged two levers 10 and 11, the lever 10 will be described in more detail below, the lever 11 being identical.
  • the lever 10 is pivotally articulated about an axis 12 secured to the frame of the device.
  • the lever 10 is provided with a first magnetic frame 15, which is also pivotally mounted about the axis 12, and a second magnetic frame 16 trapped in a non-magnetic structure 17 whose geometry appears more clearly on the Figure 4.
  • the parts 15 to 17 form the lever 10 which is an actuator of the selection device.
  • the armatures 15 and 16 are respectively provided with extensions 15 a , 15 b , 16 a and 16 b capable of coming to bear against the upper and lower poles of the electromagnets 8 and 9.
  • the lever 10 is able to take three positions against the force of a spring 18 bearing on a central rib 19 secured to the frame of the device.
  • the magnetic plates 15 and 16 are kept pressed against the poles of the electromagnets, so that the lower end 10a of the lever 10 is held back with respect to the hooks 1 and 2. in this case, the end 10a is not likely to enter in a substantially horizontal hole 1 of the hook 1, so that when the knife 3 begins its downward movement, the hooks 1 and 2 down to bear on this knife 3.
  • the lever 10 is in one of the three positions respectively represented in FIGS. 1, 2 and 3.
  • the frame 15 is movable relative to the non-magnetic structure 17. To do this, it is terminated by an eyelet 15 c allowing it to be articulated, independently of the frame 17, around of the axis 12.
  • the frame 17 comprises, for its part, cheeks 17 a and 17 b , pierced with a central hole and able to surround the eyelet 15 c on the axis 12. Thanks to this aspect of the invention, the frame 15 and the frame 16, which is trapped in the structure 17, can be positioned independently of one another, so that their respective extensions 15 a , 15 b , 16 a and 16 b actually or not bear against the poles of the electromagnets 8 and 9.
  • the frame 15 is provided with a heel 15 d in its part furthest from the axis 12.
  • a cross member 17 d of the structure 17 is arranged in the vicinity of the heel 15 d , so that in the position of FIG. 2, the heel 15 d is able to exert on the cross-member 17 d a pivoting torque around the axis 12 tending to bring the lever 10 closer to the electromagnets 8 and 9.
  • This is effective in the position of FIG. 2 where the cooperation of the armature 15 and the electromagnet 8 makes it possible to limit the movement of the structure 17 and of the end 10 a under the effect of the force of the spring 18.
  • the non-magnetic structure 17 comprises, on its outer part, a bar 17 e , placed at the height of the armature 15, capable of pushing the armature 15 towards the electromagnet 8 as a function of the position of the structure. 17. Thanks to this aspect of the invention, it is not necessary for the electromagnet 8 to be activated so that the armature 15 is pressed against the poles of the electromagnet 8. In fact, the displacement of the frame 16 against the force of the spring 18 induces the displacement of the structure 17 which is integral with it and, thanks to the bar 17 e , a pivoting torque around the axis 12 is transmitted to the frame 15, this couple having the effect of pressing the armature 15 on the electromagnet 8.
  • the geometry of the end 10a of the lever 10 gives to the geometry of the end 10a of the lever 10, one obtains the leveling of the position of the levers when the hooks 1 and 2 are in the vicinity of top dead center of their trajectory.
  • the end 10a of the lever 10 is pushed inside the device thanks to the external shape of the lever 1, which comes to press the armature 16 against the electromagnet 9 and through at the bar 17 e , the armature 15 against the electromagnet 8.
  • the electromagnets 8 and 9 thus work only against the force due to the spring 18 to immobilize the armatures in the plated position, but must not exert a large magnetic force to attract the armatures 15 or 16.
  • the electromagnets 8 and 9 can be dimensioned as a function of this single immobilizing function and consume little current. An effective leveling of the two sets of armatures of the levers 10 and 11 belonging to the selection device is thus obtained.
  • the lever 10 comprises a transverse plate 20 formed by part of the non-magnetic structure 17.
  • This plate 20 has for function to isolate electromagnets, springs and magnetic armatures of the ambient atmosphere to avoid that fluff or dust disturbs the operation of the device.
  • the frame 16 has been shown in one piece with the end 10 a of the lever 10, but it is understood that it could be interrupted below the lower part of the electromagnet 9, that is to say say approximately at the level of the spring 18, and the lower part of the lever 10 a could be constituted by an extension of the non-magnetic structure 17, without departing from the scope of the invention.
  • Three-position Jacquard loom mechanics according to the invention comprises a multiplicity of selection devices as previously described and can operate with high reliability at high speeds and consuming little energy.
  • a loom equipped with such a mechanism allows thus obtaining special fabrics such as velvet or carpets.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

Mechanical pattern selection system, in a loom, has two electromagnets (8, 9) over each other to be energised selectively. At least one lever (10, 11) pivots on a fixed axis (12), with magnetic fittings (15, 16) to work selectively with the electromagnets to give three positions to the lever. Preferably the lever (10) has a non-magnetic structure (17), with the magnetic fitting (15, 16) embedded in it. At least one fitting (15) has movement in relation to the non-magnetic structure (17), round the axis (12).

Description

L'invention a trait à un dispositif de sélection, à une mécanique d'armure de métier Jacquard à trois positions et à un métier à tisser équipé d'une telle mécanique d'armure.The invention relates to a selection device, to a Jacquard loom mechanics with three positions and one weaving loom equipped with such a weaving mechanism.

Un métier à tisser incorporant une mécanique d'armure propre à engendrer trois positions des fils de chaíne est utilisé pour la réalisation des tissus spéciaux, tels que du velours ou un tapis.A weaving loom incorporating armor mechanics suitable for generating three positions of the chain wires is used for the production of special fabrics, such as velvet or carpet.

Par la demande de brevet européen 0 723 041, on connaít une mécanique Jacquard à trois positions dans laquelle les crochets mobiles associés à un élément funiculaire déterminant la hauteur d'une lisse peuvent être sélectionnés grâce à deux électro-aimants superposés. Ce dispositif est complexe et induit des déformations répétées des crochets mobiles, ce qui interdit de leur donner une rigidité adéquate pour garantir une durée de vie suffisante pour une application industrielle et un fonctionnement à vitesse élevée. En outre, les déformations importantes imposées à ces crochets nécessitent des électro-aimants puissants, de sorte que l'énergie absorbée par le métier, auquel est associée la mécanique d'armure connue et qui compte un grand nombre d'électro-aimants, est importante.By European patent application 0 723 041, we know a three-position Jacquard mechanism in which the movable hooks associated with a determining funicular element the height of a beam can be selected using two superimposed electromagnets. This system is complex and induces repeated deformations of the movable hooks, which forbidden to give them adequate rigidity to guarantee a sufficient service life for industrial application and high speed operation. In addition, the deformations important imposed on these hooks require electromagnets powerful, so that the energy absorbed by the trade, which is associated with known armor mechanics and which has a large number of electromagnets, is important.

L'invention vise à résoudre ces problèmes et à proposer un dispositif de sélection de mécanique d'armure à trois positions, simple, donc économique, apte à fonctionner à des vitesses élevées et consommant peu d'énergie. Selon un autre aspect de l'invention, celle-ci vise à fournir un dispositif de sélection susceptible de fonctionner avec des crochets aptes à être déplacés par paires, un premier crochet de chaque paire étant en appui simple sur le second crochet de cette même paire.The invention aims to solve these problems and to propose a armor selection device with three positions, simple, therefore economical, able to operate at high speeds and low energy consumption. According to another aspect of the invention, it aims to provide a device for selection likely to work with hooks suitable for be moved in pairs, a first hook of each pair being in simple support on the second hook of this same pair.

Dans cet esprit, l'invention concerne un dispositif de sélection de mécanique d'armure à trois positions comportant deux électro-aimants superposés aptes à être sélectivement activés, caractérisé en ce qu'il comprend au moins un levier articulé autour d'un axe solidaire dudit dispositif, ledit levier étant pourvu d'armatures magnétiques aptes à coopérer sélectivement avec lesdits électro-aimants de façon à engendrer trois positions dudit levier.In this spirit, the invention relates to a device for selection of three position armor mechanics including two superimposed electromagnets capable of being selectively activated, characterized in that it comprises at least one lever articulated around an axis integral with said device, said lever being provided with magnetic frames able to cooperate selectively with said electromagnets so as to generate three positions of said lever.

Grâce à l'invention, le levier peut être placé, au choix, dans l'une des ces trois positions qui correspondent aux trois hauteurs recherchées des fils de chaínes du métier à tisser en cours de fonctionnement. Le pivotement du levier a lieu sans déformation des éléments qui le constituent ou des crochets mobiles qu'il permet de sélectionner, ce qui évite une fatigue mécanique de ces éléments.Thanks to the invention, the lever can be placed, as desired, in one of these three positions which correspond to the three desired heights of warp looms in during operation. The pivoting of the lever takes place without deformation of its constituent elements or hooks which it allows to select, which avoids fatigue mechanics of these elements.

Selon un premier aspect avantageux de l'invention, le levier comprend une structure amagnétique dans laquelle sont logées les armatures magnétiques. Cet aspect de l'invention permet de découpler le fonctionnement des armatures magnétiques et des électro-aimants associés. Dans ce cas et selon un autre aspect avantageux de l'invention, au moins une des armatures est mobile par rapport à la structure amagnétique. Cet aspect de l'invention permet de conférer au levier articulé un degré de liberté supplémentaire lorsque l'une des armatures a une position fixée par sa coopération avec l'électro-aimant auquel elle est associée.According to a first advantageous aspect of the invention, the lever includes a non-magnetic structure in which are housed the magnetic plates. This aspect of the invention allows to decouple the functioning of magnetic armatures and associated electromagnets. In this case and according to another advantageous aspect of the invention, at least one of the reinforcements is mobile with respect to the non-magnetic structure. This aspect of the invention gives the articulated lever a degree additional freedom when one of the reinforcements has a position fixed by its cooperation with the electromagnet at which it is associated.

Selon un autre aspect avantageux de l'invention, une armature mobile par rapport à la structure amagnétique et cette structure amagnétique sont articulées indépendamment l'une de l'autre autour de l'axe. Cette construction permet donc un débattement angulaire d'une armature magnétique par rapport à la structure amagnétique.According to another advantageous aspect of the invention, an armature mobile with respect to the non-magnetic structure and this non-magnetic structure are articulated independently one of the other around the axis. This construction therefore allows angular displacement of a magnetic armature with respect to the non-magnetic structure.

Selon un autre aspect avantageux de l'invention, l'armature mobile est pourvue d'un talon apte à transmettre à la structure amagnétique un couple de pivotement autour de cet axe.According to another advantageous aspect of the invention, the frame mobile is provided with a heel capable of transmitting to the non-magnetic structure a pivoting torque around this axis.

Selon un autre aspect avantageux de l'invention, la structure amagnétique est, quant à elle, pourvue d'un barreau apte à transmettre à l'armature mobile un couple de pivotement autour de l'axe.According to another advantageous aspect of the invention, the the non-magnetic structure is provided with a bar able to transmit a pivoting torque to the movable frame around the axis.

Selon un autre aspect avantageux de l'invention, le levier comprend une extrémité apte à pénétrer sélectivement dans un orifice sensiblement horizontal d'un ou deux crochets mobiles supportant un élément funiculaire déterminant la position d'au moins une lisse de ladite mécanique d'armure. L'extrémité du levier constitue ainsi un moyen d'immobilisation des crochets de la mécanique d'armure au voisinage du point mort haut de leur trajectoire.According to another advantageous aspect of the invention, the lever includes an end adapted to penetrate selectively into a substantially horizontal opening of one or two movable hooks supporting a funicular element determining the position of minus a smooth of said armor mechanics. The end of the lever thus constitutes a means of immobilizing the hooks of armor mechanics near the top dead center of their trajectory.

Selon un autre aspect avantageux de l'invention, l'extrémité du levier est apte à être déplacée par l'un des crochets lorsqu'il parvient à proximité du point mort haut de sa trajectoire. Cet aspect de l'invention permet d'obtenir le nivelage de la position des leviers de la mécanique d'armure comprenant un dispositif conforme à l'invention, ce qui permet de limiter la puissance des électro-aimants qui n'ont pas à déplacer les leviers, mais servent uniquement à les maintenir sélectivement en position.According to another advantageous aspect of the invention, the end lever is able to be moved by one of the hooks when it comes close to the top dead center of its trajectory. This aspect of the invention makes it possible to obtain the leveling of the position of the levers of the armor mechanics including a device according to the invention, which makes it possible to limit the power of electromagnets which do not have to move the levers, but only serve to maintain them selectively in position.

L'invention concerne aussi une mécanique d'armure de métier Jacquard à trois positions comprenant un dispositif de sélection tel que précédemment décrit et un métier à tisser équipé d'une telle mécanique d'armure.The invention also relates to a mechanical armor of Jacquard loom with three positions including a selection as previously described and a loom equipped with such armor mechanics.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaítront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation d'un dispositif de sélection de mécanique d'armure à trois positions conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en coupe longitudinale d'un dispositif. de sélection de mécanique d'armure conforme à l'invention dans une première position ;
  • la figure 2 est une vue partielle de la partie droite du dispositif de la figure 1 dans une seconde position ;
  • la figure 3 est une vue analogue à la figure 2 alors que le dispositif est dans une troisième position ;
  • la figure 4 est une vue en perspective d'un levier appartenant au dispositif de la figure 1 ;
  • la figure 5 est une coupe selon la ligne V-V à la figure 4 ;
  • la figure 6 est une coupe selon la ligne VI-VI à la figure 4 ;
  • la figure 7 est une coupe selon la ligne VII-VII à la figure 4 ;
  • la figure 8 est une coupe selon la ligne VIII-VIII à la figure 4 ;
  • la figure 9 est une coupe selon la ligne IX-IX à la figure 4 et
  • la figure 10 est une coupe selon la ligne X-X à la figure 4.
The invention will be better understood and other advantages of it will appear more clearly in the light of the following description of an embodiment of a device for selecting armor mechanics with three positions in accordance with its principle, given only by way of example and made with reference to the appended drawings in which:
  • Figure 1 is a longitudinal sectional view of a device. selecting armor mechanics according to the invention in a first position;
  • Figure 2 is a partial view of the right part of the device of Figure 1 in a second position;
  • Figure 3 is a view similar to Figure 2 while the device is in a third position;
  • Figure 4 is a perspective view of a lever belonging to the device of Figure 1;
  • Figure 5 is a section along the line VV in Figure 4;
  • Figure 6 is a section along line VI-VI in Figure 4;
  • Figure 7 is a section along line VII-VII in Figure 4;
  • Figure 8 is a section along line VIII-VIII in Figure 4;
  • FIG. 9 is a section on the line IX-IX in FIG. 4 and
  • FIG. 10 is a section along line XX in FIG. 4.

Le dispositif de sélection de mécanique d'armure à trois positions représenté à la figure 1 est destiné à immobiliser, au voisinage du point mort haut de leur trajectoire, deux crochets mobiles 1 et 2 aptes à être déplacés en appui sur un couteau 3 animé de mouvements alternatifs verticaux. Ces crochets mobiles 1 et 2 sont respectivement reliés à un cordon 4 ou 5 constituant un élément funiculaire permettant de déplacer verticalement une poulie commandant l'altitude d'une lisse appartenant à un harnais Jacquard. Ces crochets fonctionnent par paires, en appui l'un sur l'autre à la façon décrite dans la demande de brevet français FR-96 12329 au nom de la Demanderesse. Le mécanisme comprend deux électro-aimants superposés 8 et 9 aptes à être sélectivement activés au moyen d'un module de commande non représenté.The three armor mechanics selection device positions shown in Figure 1 is intended to immobilize, in the vicinity of the top dead center of their trajectory, two movable hooks 1 and 2 able to be moved by pressing on a knife 3 with vertical reciprocating movements. These movable hooks 1 and 2 are respectively connected to a cord 4 or 5 constituting a funicular element allowing vertically move a pulley controlling the altitude of a smooth belonging to a Jacquard harness. These hooks work in pairs, resting on each other as described in French patent application FR-96 12329 in the name of Applicant. The mechanism includes two electromagnets superimposed 8 and 9 able to be selectively activated by means a control module not shown.

De part et d'autre des électro-aimants 8 et 9 sont disposés deux leviers 10 et 11 dont le levier 10 sera décrit plus en détail dans ce qui suit, le levier 11 étant identique. Le levier 10 est articulé de façon pivotante autour d'un axe 12 solidaire du bâti du dispositif. Le levier 10 est pourvu d'une première armature magnétique 15, montée elle-aussi de façon pivotante autour de l'axe 12, et d'une seconde armature magnétique 16 prisonnière d'une structure amagnétique 17 dont la géométrie apparaít plus clairement à la figure 4. Les pièces 15 à 17 forment le levier 10 qui est un actionneur du dispositif de sélection. Les armatures 15 et 16 sont respectivement pourvues d'extensions 15a, 15b, 16a et 16b aptes à venir en appui contre les pôles supérieurs et inférieurs des électro-aimants 8 et 9. Comme il apparaít plus clairement en comparant les figures 1, 2 et 3, le levier 10 est apte à prendre trois positions à l'encontre de la force d'un ressort 18 en appui sur une nervure centrale 19 solidaire du bâti du dispositif.On both sides of the electromagnets 8 and 9 are arranged two levers 10 and 11, the lever 10 will be described in more detail below, the lever 11 being identical. The lever 10 is pivotally articulated about an axis 12 secured to the frame of the device. The lever 10 is provided with a first magnetic frame 15, which is also pivotally mounted about the axis 12, and a second magnetic frame 16 trapped in a non-magnetic structure 17 whose geometry appears more clearly on the Figure 4. The parts 15 to 17 form the lever 10 which is an actuator of the selection device. The armatures 15 and 16 are respectively provided with extensions 15 a , 15 b , 16 a and 16 b capable of coming to bear against the upper and lower poles of the electromagnets 8 and 9. As it appears more clearly by comparing the figures 1, 2 and 3, the lever 10 is able to take three positions against the force of a spring 18 bearing on a central rib 19 secured to the frame of the device.

Lorsque les deux électro-aimants 8 et 9 sont activés, les armatures magnétiques 15 et 16 sont maintenues plaquées contre les pôles des électro-aimants, de sorte que l'extrémité inférieure 10a du levier 10 est maintenue en retrait par rapport aux crochets 1 et 2. Dans ce cas, l'extrémité 10a ne risque pas de pénétrer dans un orifice sensiblement horizontal 1a du crochet 1, de sorte que, lorsque le couteau 3 amorce son mouvement de descente, les crochets 1 et 2 descendent en appui sur ce couteau 3.When the two electromagnets 8 and 9 are activated, the magnetic plates 15 and 16 are kept pressed against the poles of the electromagnets, so that the lower end 10a of the lever 10 is held back with respect to the hooks 1 and 2. in this case, the end 10a is not likely to enter in a substantially horizontal hole 1 of the hook 1, so that when the knife 3 begins its downward movement, the hooks 1 and 2 down to bear on this knife 3.

La position de la figure 1 est atteinte quel que soit l'état d'activation ou de non-activation de l'électro-aimant 8, car la force obtenue par la coopération de l'électro-aimant 9 et de la seconde armature 16 est suffisante pour vaincre l'effort de rappel dû au ressort 18.The position of figure 1 is reached whatever the activation or non-activation state of the electromagnet 8, because the force obtained by the cooperation of the electromagnet 9 and the second frame 16 is enough to defeat the return force due to spring 18.

Dans la position de la figure 2, seul l'électro-aimant 8 est activé, de sorte que, sous l'effet de la force de rappel du ressort 18, l'extrémité 10a du levier 10 pénètre dans l'orifice la du crochet 1 et maintient le cordon 4 et la poulie non représentée qui lui est associée en position haute, alors que le crochet 2 suit le couteau 3 dans son mouvement de descente.In the position of Figure 2, only the electromagnet 8 is activated, so that, under the effect of the restoring force of the spring 18, the end 10a of the lever 10 enters the orifice hook 1 and maintains the cord 4 and the pulley not shown which is associated with it in the high position, while the hook 2 follows the knife 3 in its downward movement.

Dans la position de la figure 3, lorsqu'aucun des électro-aimants 8 ou 9 n'est activé, la force de rappel due au ressort 18 repousse l'extrémité 10a du levier 10 vers les crochets 1 et 2, de telle sorte qu'elle pénètre à la fois dans les orifices horizontaux 1a et 2a et qu'elle immobilise les crochets 1 et 2 au voisinage du point mort haut de leur trajectoire.In the position of Figure 3, when neither of the electromagnets 8 or 9 is enabled, the restoring force due to the spring 18 pushes the end 10a of the lever 10 to the brackets 1 and 2, so that it enters both the horizontal holes 1 a and 2 a and that it immobilizes the hooks 1 and 2 in the vicinity of the top dead center of their trajectory.

Ainsi, en fonction de la coopération des armatures 15 et 16 avec les électro-aimants 8 et 9, le levier 10 est dans l'une des trois positions respectivement représentées aux figures 1, 2 et 3.Thus, depending on the cooperation of the reinforcements 15 and 16 with the electromagnets 8 and 9, the lever 10 is in one of the three positions respectively represented in FIGS. 1, 2 and 3.

Selon un aspect particulièrement avantageux de l'invention, l'armature 15 est mobile par rapport à la structure amagnétique 17. Pour ce faire, elle est terminée par un oeillet 15c permettant de l'articuler, indépendamment de l'armature 17, autour de l'axe 12. L'armature 17 comprend, quant à elle, des joues 17a et 17b, percées d'un trou central et aptes à entourer l'oeillet 15c sur l'axe 12. Grâce à cet aspect de l'invention, l'armature 15 et l'armature 16, qui est prisonnière de la structure 17, peuvent être positionnées indépendamment l'une de l'autre, de telle sorte que leurs extensions respectives 15a, 15b, 16a et 16b portent effectivement ou non contre les pôles des électro-aimants 8 et 9. According to a particularly advantageous aspect of the invention, the frame 15 is movable relative to the non-magnetic structure 17. To do this, it is terminated by an eyelet 15 c allowing it to be articulated, independently of the frame 17, around of the axis 12. The frame 17 comprises, for its part, cheeks 17 a and 17 b , pierced with a central hole and able to surround the eyelet 15 c on the axis 12. Thanks to this aspect of the invention, the frame 15 and the frame 16, which is trapped in the structure 17, can be positioned independently of one another, so that their respective extensions 15 a , 15 b , 16 a and 16 b actually or not bear against the poles of the electromagnets 8 and 9.

L'armature 15 est pourvue d'un talon 15d dans sa partie la plus éloignée de l'axe 12. D'autre part, une traverse 17d de la structure 17 est disposée au voisinage du talon 15d, de telle sorte que dans la position de la figure 2, le talon 15d est apte à exercer sur la traverse 17d un couple de pivotement autour de l'axe 12 tendant à rapprocher le levier 10 des électro-aimants 8 et 9. Ceci est effectif dans la position de la figure 2 où la coopération de l'armature 15 et de l'électro-aimant 8 permet de limiter le mouvement de la structure 17 et de l'extrémité 10a sous l'effet de la force du ressort 18.The frame 15 is provided with a heel 15 d in its part furthest from the axis 12. On the other hand, a cross member 17 d of the structure 17 is arranged in the vicinity of the heel 15 d , so that in the position of FIG. 2, the heel 15 d is able to exert on the cross-member 17 d a pivoting torque around the axis 12 tending to bring the lever 10 closer to the electromagnets 8 and 9. This is effective in the position of FIG. 2 where the cooperation of the armature 15 and the electromagnet 8 makes it possible to limit the movement of the structure 17 and of the end 10 a under the effect of the force of the spring 18.

Par ailleurs, la structure amagnétique 17 comprend, sur sa partie extérieure, un barreau 17e, disposé à hauteur de l'armature 15, apte à repousser l'armature 15 vers l'électro-aimant 8 en fonction de la position de la structure 17. Grâce à cet aspect de l'invention, il n'est pas nécessaire que l'électro-aimant 8 soit activé pour que l'armature 15 soit plaquée contre les pôles de l'électro-aimant 8. En effet, le déplacement de l'armature 16 contre la force du ressort 18 induit le déplacement de la structure 17 qui en est solidaire et, grâce au barreau 17e, un couple de pivotement autour de l'axe 12 est transmis à l'armature 15, ce couple ayant pour effet de plaquer l'armature 15 sur l'électro-aimant 8.Furthermore, the non-magnetic structure 17 comprises, on its outer part, a bar 17 e , placed at the height of the armature 15, capable of pushing the armature 15 towards the electromagnet 8 as a function of the position of the structure. 17. Thanks to this aspect of the invention, it is not necessary for the electromagnet 8 to be activated so that the armature 15 is pressed against the poles of the electromagnet 8. In fact, the displacement of the frame 16 against the force of the spring 18 induces the displacement of the structure 17 which is integral with it and, thanks to the bar 17 e , a pivoting torque around the axis 12 is transmitted to the frame 15, this couple having the effect of pressing the armature 15 on the electromagnet 8.

Grâce à la géométrie de l'extrémité 10a du levier 10, on obtient le nivelage de la position des leviers lorsque les crochets 1 et 2 sont au voisinage du point mort haut de leur trajectoire. Dans ce cas en effet, l'extrémité 10a du levier 10 est repoussée vers l'intérieur du dispositif grâce à la forme extérieure du levier 1, ce qui revient à plaquer l'armature 16 contre l'électro-aimant 9 et, grâce au barreau 17e, l'armature 15 contre l'électro-aimant 8. Les électro-aimants 8 et 9 travaillent ainsi uniquement à l'encontre de la force due au ressort 18 pour immobiliser les armatures en position plaquée, mais ne doivent pas exercer une force magnétique importante pour attirer les armatures 15 ou 16. Les électro-aimants 8 et 9 peuvent être dimensionnés en fonction de cette seule fonction d'immobilisation et consomment peu de courant. Un nivelage efficace des deux séries d'armatures des leviers 10 et 11 appartenant au dispositif de sélection est ainsi obtenu. Thanks to the geometry of the end 10a of the lever 10, one obtains the leveling of the position of the levers when the hooks 1 and 2 are in the vicinity of top dead center of their trajectory. In this case indeed, the end 10a of the lever 10 is pushed inside the device thanks to the external shape of the lever 1, which comes to press the armature 16 against the electromagnet 9 and through at the bar 17 e , the armature 15 against the electromagnet 8. The electromagnets 8 and 9 thus work only against the force due to the spring 18 to immobilize the armatures in the plated position, but must not exert a large magnetic force to attract the armatures 15 or 16. The electromagnets 8 and 9 can be dimensioned as a function of this single immobilizing function and consume little current. An effective leveling of the two sets of armatures of the levers 10 and 11 belonging to the selection device is thus obtained.

Le levier 10 comprend un plateau transversal 20 formé par une partie de la structure amagnétique 17. Ce plateau 20 a pour fonction d'isoler les électro-aimants, les ressorts et les armatures magnétiques de l'atmosphère ambiante afin d'éviter que des bourres ou de la poussière ne viennent perturber le fonctionnement du dispositif.The lever 10 comprises a transverse plate 20 formed by part of the non-magnetic structure 17. This plate 20 has for function to isolate electromagnets, springs and magnetic armatures of the ambient atmosphere to avoid that fluff or dust disturbs the operation of the device.

L'armature 16 a été représentée monobloc avec l'extrémité 10a du levier 10, mais il est bien entendu qu'elle pourrait être interrompue au-dessous de la partie inférieure de l'électro-aimant 9, c'est-à-dire à peu près au niveau du ressort 18, et la partie inférieure du levier 10a pourrait être constituée par un prolongement de la structure amagnétique 17, ceci sans sortir du cadre de l'invention.The frame 16 has been shown in one piece with the end 10 a of the lever 10, but it is understood that it could be interrupted below the lower part of the electromagnet 9, that is to say say approximately at the level of the spring 18, and the lower part of the lever 10 a could be constituted by an extension of the non-magnetic structure 17, without departing from the scope of the invention.

L'invention a été décrite en coopération avec deux crochets conformes à l'invention de la demande de brevet FR-96 12329 au nom de la Demanderesse, mais elle s'applique à tous types de crochets pour autant qu'ils peuvent être sélectionnés en fonction des positions de l'extrémité d'un levier.The invention has been described in cooperation with two hooks in accordance with the invention of patent application FR-96 12329 in the name of the Claimant, but it applies to all hook types as far as they can be selected depending on the positions of the end of a lever.

Une mécanique d'armure de métier Jacquard à trois positions conforme à l'invention comprend une multiplicité de dispositifs de sélection tels que précédemment décrits et peut fonctionner avec une grande fiabilité à des vitesses élevées et en consommant peu d'énergie.Three-position Jacquard loom mechanics according to the invention comprises a multiplicity of selection devices as previously described and can operate with high reliability at high speeds and consuming little energy.

Un métier à tisser équipé d'une telle mécanique permet ainsi d'obtenir à moindre coût des tissus spéciaux tel que du velours ou des tapis.A loom equipped with such a mechanism allows thus obtaining special fabrics such as velvet or carpets.

Claims (10)

Dispositif de sélection de mécanique d'armure à trois positions comportant deux électro-aimants (8, 9) supérposés aptes à être sélectivement activés, caractérisé en ce qu'il comprend au moins un levier (10, 11) articulé autour d'un axe (12) solidaire dudit dispositif, ledit levier étant pourvu d'armatures magnétiques (15, 16) aptes à coopérer sélectivement avec lesdits électro-aimants de façon à engendrer trois positions dudit levier.Three armor mechanics selection device positions with two superimposed electromagnets (8, 9) able to be selectively activated, characterized in that it comprises at least one lever (10, 11) articulated around an axis (12) integral with said device, said lever being provided magnetic frames (15, 16) capable of cooperating selectively with said electromagnets so as to generate three positions of said lever. Dispositif de sélection selon la revendication 1, caractérisé en ce que ledit levier (10) comprend une structure amagnétique (17) dans laquelle sont logées lesdites armatures magnétiques (15, 16).Selection device according to claim 1, characterized in that said lever (10) comprises a structure non-magnetic (17) in which the said reinforcements are housed magnetic (15, 16). Dispositif de sélection selon la revendication 2, caractérisé en ce qu'au moins une (15) desdites armatures est mobile par rapport à ladite structure amagnétique (17).Selection device according to claim 2, characterized in that at least one (15) of said frames is movable relative to said non-magnetic structure (17). Dispositif de sélection selon la revendication 3, caractérisé en ce que ladite armature (15) mobile par rapport à ladite structure amagnétique (17) et ladite structure amagnétique sont articulées indépendamment l'une de l'autre autour dudit axe (12).Selection device according to claim 3, characterized in that said armature (15) movable relative to said non-magnetic structure (17) and said structure non-magnetic are articulated independently of each other around said axis (12). Dispositif de sélection selon la revendication 3, caractérisé en ce que ladite armature mobile (15) est pourvue d'un talon (15d) apte à transmettre à ladite stucture amagnétique (17d) un couple de pivotement autour dudit axe (12).Selection device according to claim 3, characterized in that said movable frame (15) is provided with a heel (15 d ) capable of transmitting to said non-magnetic structure (17 d ) a pivoting torque around said axis (12). Dispositif de sélection selon la revendication 3, caractérisé en ce que ladite structure amagnétique est pourvue d'un barreau (17e) apte à transmettre à ladite armature mobile (15) un couple de pivotement autour dudit axe (12).Selection device according to claim 3, characterized in that said non-magnetic structure is provided with a bar (17 e ) capable of transmitting to said mobile frame (15) a pivoting torque around said axis (12). Dispositif de sélection selon la revendication 1, caractérisé en ce que ledit levier (10) comprend une extrémité (10a) apte à pénétrer sélectivement dans un orifice (1a, 2a) sensiblement horizontal d'un ou deux crochet(s) mobile(s) (1, 2) supportant un élément funiculaire (4, 5) déterminant la position d'au moins une lisse de ladite mécanique d'armure.Selection device according to claim 1, characterized in that said lever (10) comprises an end (10 a ) capable of selectively penetrating a substantially horizontal orifice (1 a , 2 a ) of one or two movable hook (s) (s) (1, 2) supporting a funicular element (4, 5) determining the position of at least one heald of said armor mechanism. Dispositif de sélection selon la revendication 7, caractérisé en ce que ladite extrémité (10a) est apte à être déplacée par l'un (1) desdits crochets lorsqu'il parvient à proximité du point mort haut de sa trajectoire.Selecting device according to Claim 7, characterized in that said end (10a) is adapted to be displaced by one (1) of said hooks when it reaches near the top dead center of its trajectory. Mécanique d'armure de métier Jacquard à trois positions comprenant un dispositif de sélection selon l'une des revendications précédentes.Three-position Jacquard loom mechanic comprising a selection device according to one of claims previous. Métier à tisser équipé d'une mécanique d'armure selon la revendication 9.Weaving loom equipped with an armor mechanism according to claim 9.
EP97420222A 1996-11-29 1997-11-27 Selection device, three-position shedding mechanism and loom with such a shedding mechanism Expired - Lifetime EP0851048B1 (en)

Applications Claiming Priority (2)

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FR9614965 1996-11-29
FR9614965A FR2756574B1 (en) 1996-11-29 1996-11-29 SELECTION DEVICE, THREE POSITION WEAPON MECHANICS AND WEAVING MACHINE EQUIPPED WITH SUCH WEAPON MECHANICS

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EP0851048B1 EP0851048B1 (en) 2002-04-10

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JP (1) JP4043570B2 (en)
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EP1111107A1 (en) * 1999-12-23 2001-06-27 NV Michel van de Wiele Shed-forming device for a weaving machine
BE1013193A3 (en) * 1999-12-23 2001-10-02 Wiele Michel Van De Nv Shed-forming device for a weaving machine.
US6336478B2 (en) 1999-12-23 2002-01-08 N.V. Michel Van De Wiele Shed-forming device for a weaving machine
EP1413657A1 (en) * 2002-10-25 2004-04-28 Staubli Lyon Shedding mechanism and loom with such a mechanism
EP4015686A1 (en) 2020-12-21 2022-06-22 Staubli Lyon Mechanism for forming a shed and jacquard loom equipped with such a mechanism
EP4015687A1 (en) 2020-12-21 2022-06-22 Staubli Lyon Mechanism for forming a shed and jacquard loom equipped with such a mechanism
FR3118070A1 (en) 2020-12-21 2022-06-24 Staubli Lyon SHEDDING MECHANISM AND JACQUARD-TYPE Loom EQUIPPED WITH SUCH MECHANISM
FR3118069A1 (en) 2020-12-21 2022-06-24 Staubli Lyon SHEDDING MECHANISM AND JACQUARD TYPE Loom
US11702771B2 (en) 2020-12-21 2023-07-18 Staubli Lyon Shedding mechanism and jacquard-type weaving loom equipped with such a mechanism

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FR2756574B1 (en) 1999-01-08
DE69711830T2 (en) 2002-11-28
DE69711830D1 (en) 2002-05-16
JP4043570B2 (en) 2008-02-06
US5881777A (en) 1999-03-16
FR2756574A1 (en) 1998-06-05
JPH10183442A (en) 1998-07-14
EP0851048B1 (en) 2002-04-10

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