EP1939338B1 - Shed forming device in a Jacquard loom, and Jacquard loom equipped with such a device - Google Patents

Shed forming device in a Jacquard loom, and Jacquard loom equipped with such a device Download PDF

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Publication number
EP1939338B1
EP1939338B1 EP20070356179 EP07356179A EP1939338B1 EP 1939338 B1 EP1939338 B1 EP 1939338B1 EP 20070356179 EP20070356179 EP 20070356179 EP 07356179 A EP07356179 A EP 07356179A EP 1939338 B1 EP1939338 B1 EP 1939338B1
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EP
European Patent Office
Prior art keywords
pulleys
mechanism according
weaving mechanism
pulley
coupling
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EP20070356179
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German (de)
French (fr)
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EP1939338A1 (en
Inventor
Michael Himmelstoss
Alexis Porte
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Staeubli Lyon SA
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Staeubli Lyon SA
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/12—Multiple-shed jacquards, i.e. jacquards which move warp threads to several different heights, e.g. for weaving pile fabrics

Definitions

  • the present invention relates to a weave mechanism for positioning the warp yarns of a Jacquard weaving loom and to a Jacquard weaving loom equipped with such weave mechanics.
  • EP-A-0 839 937 discloses a weave mechanism for obtaining three positions of the warp son through the use of superimposed hooks adapted to be moved vertically, in pairs, by knives and associated with a set of vertically aligned pulleys. Such a three-position weave mechanism, however, does not allow the weaving of certain complex fabrics which, especially in carpet weaving, require four positions of the warp threads.
  • EP-A-0 665 312 discloses a four-position armor mechanic in which each shedding device has four juxtaposed hooks that can be moved vertically by two knives. This device is effective to obtain four regularly spaced warp thread positions. However, the size of such a device is important because the four hooks are arranged side by side.
  • US Patent 5,522,435 discloses a weave mechanism in which each shedding device comprises two hooks adapted to be moved vertically by two reciprocating knives and associated with a set of pulleys, so that the elements of the device can reach four predetermined configurations different corresponding to four different positions of the warp.
  • the fourth position of the warp yarn is obtained in each device by transmitting the movement of one of the knives to the lower pulley of the set of pulleys, by means of a grid external to the device.
  • the warp son of the upper and lower plies are controlled by two separate devices, the amplitude of the movement to be transmitted to the lower pulley of each device being different. This results in the need to provide two separate grids, which makes this complex construction and cumbersome.
  • each device two positions of the warp are only accessible in pairs, that is to say when the left knife is in the high position and the straight knife in the lower position, while the other two positions of the warp are only accessible oddly, that is to say when the left knife is in the low position and the straight knife in high position.
  • the warp must be able to move from the high position to the low position. Therefore, it is impossible for a warp controlled by this device to evolve at any time indifferently to one or the other of the two intermediate positions, which reduces the possibilities of weaving, especially weaving carpet loop.
  • the construction of this device does not make it possible to obtain four equidistant positions of the warp, which is penalizing in terms of crowd opening.
  • the invention more particularly intends to remedy by proposing a clean armor mechanism for generating four positions of the warp yarns of a loom, with a reduced complexity and compactness of the mechanism.
  • the subject of the invention is a weave mechanism for positioning the warp yarns of a Jacquard weaving loom, comprising at least one shedding device, each device for forming the shed having at least two movable upper hooks, arranged in an upper part of the device and able to be displaced vertically by two knives animated with reciprocating movements in opposition of phase, each shedding device further comprising a set of vertically aligned pulleys in a median part of the device, the set of pulleys comprising partial winding pulleys of a cord provided at one end with a carabiner for fixing a rail, certain winding pulleys of the rope being able to be displaced vertically according to the positions of the upper hooks, characterized in that one of the winding pulleys of the cord is t able to be moved vertically by a hitch comprising at least one cord that wraps around at least one additional pulley integral in translation with the pulley made mobile by the hitch, the cord being fixed by one of
  • the term pair designates a configuration of a crowd forming device in which the left knife is in the up position and the right knife in the lower position, and oddly by a configuration in which the knife left is in the low position and the right knife is in the up position.
  • the invention also relates to a jacquard loom equipped with a weave mechanism as described above.
  • the device 1 for forming the crowd represented in FIG. figure 1 has four movable upper hooks 2, 3, 6 and 7 adapted to be moved vertically, in pairs, by two knives 10 and 11 animated reciprocating movement in opposition of phase. More specifically, the device 1 comprises two movable carrying hooks 2 and 3, which are connected by a cable 4 forming a funicular element passing around a pulley 5, and two movable follower hooks 6 and 7, which are connected by a second cable 8 partially surrounding a second pulley 9. The knives 10 and 11 are able to selectively move the carrier hooks 2 and 3, with levers 2a and 3a of these hooks.
  • the follower hooks 6 and 7 are respectively in single support on the carrier hooks 2 and 3, so that the hooks 2 and 6 can be moved together by the knife 10, as well as the hooks 3 and 7 can be moved together by the knife 11.
  • the hooks 2 and 6 constitute a first pair of upper movable hooks
  • the hooks 3 and 7 constitute a second pair of upper movable hooks.
  • a device 12 comprising for example four electromagnets not shown and electronically controlled, is provided for immobilizing the hooks 2, 3, 6 or 7 in the vicinity of the top dead center of the trajectory they reach in support on the knives 10 and 11
  • a single device 12 is used for the selection of the four mobile hooks mentioned above, this device 12 being of any suitable type.
  • the height relative to the not shown frame of the mechanism of the pulleys 5 and 9 located in the middle part of the device 1 is variable according to the respective positions of the upper mobile hooks 2, 3, 6 and 7.
  • the device 1 further comprises three other pulleys 15, 16 and 17 located in its middle part, the five pulleys 5, 9, 15, 16 and 17 being aligned vertically, which means that the centers of the five pulleys are arranged substantially on a common right of vertical direction.
  • the four upper pulleys 5, 9, 15 and 16 are able to be displaced vertically depending on the positions of the four upper movable hooks 2, 3, 6 and 7.
  • the fifth pulley 17 is also able to be moved vertically under the action of an additional hitch, located in the lower part of the device 1 and comprising a sixth pulley 19 disposed in the vertical alignment of the other five pulleys.
  • the displacement of the upper movable hooks 2, 3, 6 and 7 and the sixth lower pulley 19 makes it possible to obtain six different configurations, predetermined by construction, of the five pulleys 5, 9, 15, 16 and 17, in which the arrangement height of the five aforementioned pulleys relative to the frame of the mechanics and / or the relative spacing of these pulleys are different, as visible at Figures 1 to 6 .
  • the six pulleys 5, 9, 15, 16, 17 and 19 of the device 1 are coplanar, which limits the lateral bulk of all they form and simplify the construction of the mechanical.
  • a guide rail 20 keeps the four upper pulleys 5, 9, 15 and 16 aligned with each other.
  • the rail 20 comprises an oblong slot 20a in which a slider 21 can be moved.
  • the pulleys 5 and 15 are mounted on the slider 21, so that they are free in rotation and fixed in translation relative to this slider.
  • the pulleys 9 and 16 are respectively mounted at the upper and lower ends of the rail 20, so that they are free in rotation and fixed in translation relative to the rail 20.
  • the rail 20 is supported by the upper pulley 9 and mobile at altitude with the this.
  • the fifth pulley 17 and the sixth pulley 19 are mounted on a second slider 18, so that they are free to rotate and fixed in translation relative to this second slider.
  • the slider 18 is movable in translation relative to the frame of the machine and guided in translation by a slider not shown.
  • a cord 23 is fixed, at one of its ends, to a base 22 secured to the frame of the mechanism and passes successively around the pulley 16, the pulley 17, then the pulley 15 and hangs below the pulley 15.
  • the second end of the cord 23 carries a carabiner 24 for suspending a not shown control line of the son of warp position.
  • a not shown arch wire is hooked to the carabiner 24 and makes it possible to control the vertical reciprocating movement of the corresponding rail, against an elastic force exerted by a spring connecting the lower end of the rail to the frame of the loom weaving machine equipped with armor mechanics.
  • several arcade son can be hooked to the carabiner 24, which allows to control several smooth with this carabiner.
  • the set of archwires attached to the various carabiners form the harness of mechanics.
  • the additional hitch comprises a bead 25, which is fixed at one of its ends to a second base 26 secured to the frame of the machine and passes around the sixth pulley 19.
  • the second end of the bead 25, located on the side opposite the carabiner 24, is provided with a lower mobile hook 27.
  • the lower mobile hook 27 is adapted to be moved vertically by a lower knife 31 driven in a movement in phase with the movement of the knife 11 and stroke H equal to that of the knives 10 and 11.
  • the selection device 12 holds neither the carrier hook 2 nor the follower hook 6, it is both the pulleys 5 and 9 which have a translational movement down a height H / 2.
  • the rise of the lower knife 31 accompanied by the lower hook 27 allows the movement of the sixth pulley 19 to its upper position, and the fifth pulley 17, whose position is fixed relative to the pulley 19, rises by a height H / 2.
  • Each device 1 of a weave mechanism thus makes it possible to obtain four equidistant positions of the carabiner 24, the pitch between two adjacent positions being equal to the stroke H of the knives of the device 1.
  • the two intermediate positions are accessible oddly.
  • these two intermediate positions are also accessible evenly, as shown by the configurations of the figures 3 and 5 , for which a reasoning in terms of displacement of the pulleys can be carried out, as for the figures 2 and 4 .
  • the high position of the carabiner 24 is only accessible for one pair pick, while the lower position is only accessible for an odd pick.
  • the shedding devices 1 are advantageously grouped into groups of eight devices to form a module that can be arranged unitarily in the mechanism.
  • the number of devices of a module may be different from eight.
  • the possibilities of weaving of pile and loop carpets are improved since the intermediate positions are accessible both as even and odd duits, the formation of the remaining carpet hairs guaranteed with the high and low positions accessible one after the other.
  • the device 1 according to the invention makes it possible to reach four positions, of which two intermediate positions are accessible both at odd and even ends, it can be used in carpet weaving applications without there being of distinction of construction, or distinction of control mode, between the device for actuating a pile thread of the upper sheet and the device for actuating a pile thread of the lower sheet.
  • all the devices 1 of a weave mechanism according to the invention are controlled directly by the knives 10, 11 and 31.
  • the multiplication of the movement amplitude of the knives which makes it possible to obtain a movement of pulleys 15, 16 and 17 with strokes compatible with the four positions of the carabiner 24 to be achieved, is provided by elements internal to the device 1 and is the same for all devices of the mechanics, which advantageously simplifies the construction of a loom incorporating such a mechanism and decreases the size.
  • the three pulleys 15, 16 and 17, responsible for the movement of the carabiner 24, can move independently of each other in even and odd picks.
  • the pulley 17 an H / 2 stroke displacement
  • the four positions proposed for the carabiner 24 are evenly spaced, which optimizes the shed openings and therefore the efforts on the loom.
  • the vertical alignment of the constituent elements of the device 1 makes it possible to limit its bulk.
  • a loom equipped with a weave mechanism according to the invention thus has a good compactness.
  • the invention is not limited to the example described and shown.
  • the knives 11 and 31 can be replaced by two parts of a single knife 11 sized to reach both the upper hooks 3 and 7 and the lower hook 27.
  • L The use of such a long knife 11 saves space, thanks to the removal of a knife actuating device.
  • the mechanical control of the device 1 is then identical to that of a conventional device comprising two movable knives in phase opposition, despite the presence of the additional lower hook 27. It is also possible to envisage mounting certain devices 1 of a loom according to the invention, actuated by the same left and right knives, with the lower hook 27 arranged on the side of the upper left hooks of the device 1 and other devices.
  • the lower hook 27 may be associated with an electronic selection device, similar to the selection device 12 of the upper hooks.
  • the lower hook 27 then follows the movement of the lower knife 31 if the electronic control suspends the maintenance of the hook in its lower position.
  • the pulley 19, and therefore the pulley 17, in the lower position during the odd picks Three additional configurations of the device 1 are then possible, so that the upper position and the two intermediate positions are accessible both odd and even, while the lower position remains accessible only odd. Therefore, it is possible to keep the upper position and the two intermediate positions on two consecutive picks, by applying to the next pick a symmetrical selection of the upper hooks, which limits the parts to move to maintain the same position of the carabiner 24.

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

Description

La présente invention a trait à une mécanique d'armure pour le positionnement des fils de chaîne d'un métier à tisser de type Jacquard et à un métier à tisser de type Jacquard équipé d'une telle mécanique d'armure.The present invention relates to a weave mechanism for positioning the warp yarns of a Jacquard weaving loom and to a Jacquard weaving loom equipped with such weave mechanics.

EP-A-0 839 937 décrit une mécanique d'armure permettant d'obtenir trois positions des fils de chaîne grâce à l'utilisation de crochets superposés aptes à être déplacés verticalement, par paire, par des couteaux et associés à un ensemble de poulies alignées verticalement. Une telle mécanique d'armure à trois positions ne permet toutefois pas le tissage de certains tissus complexes qui, notamment en tissage tapis, nécessitent quatre positions des fils de chaîne. EP-A-0 839 937 discloses a weave mechanism for obtaining three positions of the warp son through the use of superimposed hooks adapted to be moved vertically, in pairs, by knives and associated with a set of vertically aligned pulleys. Such a three-position weave mechanism, however, does not allow the weaving of certain complex fabrics which, especially in carpet weaving, require four positions of the warp threads.

EP-A-0 665 312 décrit une mécanique d'armure à quatre positions dans laquelle chaque dispositif de formation de la foule comporte quatre crochets juxtaposés, aptes à être déplacés verticalement par deux couteaux. Ce dispositif est efficace pour obtenir quatre positions du fil de chaîne régulièrement espacées. Cependant, l'encombrement d'un tel dispositif est important car les quatre crochets sont disposés côte à côte. EP-A-0 665 312 discloses a four-position armor mechanic in which each shedding device has four juxtaposed hooks that can be moved vertically by two knives. This device is effective to obtain four regularly spaced warp thread positions. However, the size of such a device is important because the four hooks are arranged side by side.

Par ailleurs, US-A-5,522,435 décrit une mécanique d'armure dans laquelle chaque dispositif de formation de la foule comporte deux crochets aptes à être déplacés verticalement par deux couteaux en mouvements alternatifs et associés à un ensemble de poulies, de telle sorte que les éléments du dispositif peuvent atteindre quatre configurations prédéterminées différentes correspondant à quatre positions différentes du fil de chaîne. La quatrième position du fil de chaîne est obtenue dans chaque dispositif en transmettant le mouvement de l'un des couteaux à la poulie inférieure de l'ensemble de poulies, au moyen d'une grille extérieure au dispositif. Or, dans cette construction, les fils de chaîne des nappes supérieure et inférieure sont commandés par deux dispositifs distincts, l'amplitude du mouvement à transmettre à la poulie inférieure de chaque dispositif étant différente. Il en résulte la nécessité de prévoir deux grilles distinctes, ce qui rend cette construction complexe et encombrante. Par ailleurs, dans chaque dispositif, deux positions du fil de chaîne ne sont accessibles qu'en duite paire, c'est-à-dire lorsque le couteau gauche est en position haute et le couteau droit en position basse, alors que les deux autres positions du fil de chaîne ne sont accessibles qu'en duite impaire, c'est-à-dire lorsque le couteau gauche est en position basse et le couteau droit en position haute. Or, pour créer le poil dans un tapis, le fil de chaîne doit pouvoir évoluer de la position haute à la position basse. Dès lors, il est impossible pour un fil de chaîne commandé par ce dispositif d'évoluer à tout moment indifféremment vers l'une ou l'autre des deux positions intermédiaires, ce qui réduit les possibilités de tissage, notamment en tissage tapis à boucles. En outre, la construction de ce dispositif ne permet pas d'obtenir quatre positions du fil de chaîne équidistantes, ce qui est pénalisant en terme d'ouverture de foule.Otherwise, US Patent 5,522,435 discloses a weave mechanism in which each shedding device comprises two hooks adapted to be moved vertically by two reciprocating knives and associated with a set of pulleys, so that the elements of the device can reach four predetermined configurations different corresponding to four different positions of the warp. The fourth position of the warp yarn is obtained in each device by transmitting the movement of one of the knives to the lower pulley of the set of pulleys, by means of a grid external to the device. However, in this construction, the warp son of the upper and lower plies are controlled by two separate devices, the amplitude of the movement to be transmitted to the lower pulley of each device being different. This results in the need to provide two separate grids, which makes this complex construction and cumbersome. Furthermore, in each device, two positions of the warp are only accessible in pairs, that is to say when the left knife is in the high position and the straight knife in the lower position, while the other two positions of the warp are only accessible oddly, that is to say when the left knife is in the low position and the straight knife in high position. However, to create the hair in a carpet, the warp must be able to move from the high position to the low position. Therefore, it is impossible for a warp controlled by this device to evolve at any time indifferently to one or the other of the two intermediate positions, which reduces the possibilities of weaving, especially weaving carpet loop. In addition, the construction of this device does not make it possible to obtain four equidistant positions of the warp, which is penalizing in terms of crowd opening.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant une mécanique d'armure propre à engendrer quatre positions des fils de chaîne d'un métier à tisser, avec une complexité et un encombrement réduits de la mécanique.It is these drawbacks that the invention more particularly intends to remedy by proposing a clean armor mechanism for generating four positions of the warp yarns of a loom, with a reduced complexity and compactness of the mechanism.

A cet effet, l'invention a pour objet une mécanique d'armure pour le positionnement des fils de chaîne d'un métier à tisser de type Jacquard, comprenant au moins un dispositif de formation de la foule, chaque dispositif de formation de la foule comportant au moins deux crochets mobiles supérieurs, disposés dans une partie supérieure du dispositif et aptes à être déplacés verticalement par deux couteaux animés de mouvements alternatifs en opposition de phase, chaque dispositif de formation de la foule comportant en outre un ensemble de poulies alignées verticalement dans une partie médiane du dispositif, l'ensemble de poulies comportant des poulies d'enroulement partiel d'une cordelette munie à une extrémité d'un mousqueton de fixation d'une lisse, certaines poulies d'enroulement de la cordelette étant aptes à être déplacées verticalement en fonction des positions des crochets supérieurs, caractérisée en ce que l'une des poulies d'enroulement de la cordelette est apte à être déplacée verticalement par un attelage comprenant au moins un cordon qui s'enroule autour d'au moins une poulie additionnelle solidaire en translation de la poulie rendue mobile par l'attelage, le cordon étant fixé par l'une de ses extrémités au bâti de la mécanique, alors que l'autre extrémité du cordon est apte à être déplacée par un couteau de déplacement de l'attelage.For this purpose, the subject of the invention is a weave mechanism for positioning the warp yarns of a Jacquard weaving loom, comprising at least one shedding device, each device for forming the shed having at least two movable upper hooks, arranged in an upper part of the device and able to be displaced vertically by two knives animated with reciprocating movements in opposition of phase, each shedding device further comprising a set of vertically aligned pulleys in a median part of the device, the set of pulleys comprising partial winding pulleys of a cord provided at one end with a carabiner for fixing a rail, certain winding pulleys of the rope being able to be displaced vertically according to the positions of the upper hooks, characterized in that one of the winding pulleys of the cord is t able to be moved vertically by a hitch comprising at least one cord that wraps around at least one additional pulley integral in translation with the pulley made mobile by the hitch, the cord being fixed by one of its ends at the frame of the mechanics, while the other end of the cord is able to be moved by a knife moving the hitch.

Au sens de l'invention, on désigne par duite paire une configuration d'un dispositif de formation de la foule dans laquelle le couteau gauche est en position haute et le couteau droit en position basse, et par duite impaire une configuration dans laquelle le couteau gauche est en position basse et le couteau droit en position haute.Within the meaning of the invention, the term pair designates a configuration of a crowd forming device in which the left knife is in the up position and the right knife in the lower position, and oddly by a configuration in which the knife left is in the low position and the right knife is in the up position.

Selon d'autres caractéristiques avantageuses d'une mécanique d'armure selon l'invention, prises isolément ou selon toutes les combinaisons techniquement possibles :

  • la poulie rendue mobile par l'attelage est la poulie inférieure de l'ensemble de poulies disposées dans la partie médiane du dispositif de formation de la foule ;
  • l'attelage est disposé dans une partie inférieure du dispositif de formation de la foule ;
  • l'ensemble de poulies disposées dans la partie médiane du dispositif de formation de la foule et la ou chaque poulie de l'attelage sont alignées verticalement ;
  • l'extrémité mobile du cordon est munie d'un crochet mobile inférieur, ce crochet inférieur étant apte à être déplacé par le couteau de déplacement de l'attelage ;
  • chaque dispositif de formation de la foule comporte un dispositif de sélection apte à immobiliser le crochet inférieur au voisinage du point mort bas de sa trajectoire ;
  • dans chaque dispositif de formation de la foule, le crochet inférieur et le mousqueton sont disposés sur deux côtés opposés du dispositif ;
  • le couteau de déplacement de l'attelage est déplacé en fonction de la position de l'un des couteaux de déplacement des crochets supérieurs ;
  • le couteau de déplacement de l'attelage est mobile selon une course égale à la course des couteaux de déplacement des crochets supérieurs ;
  • la poulie rendue mobile par l'attelage est mobile verticalement selon une course égale à la moitié de la course des couteaux de déplacement des crochets supérieurs ;
  • le couteau de déplacement de l'attelage est une partie inférieure de l'un des couteaux de déplacement des crochets supérieurs ;
  • chaque dispositif de formation de la foule comporte quatre crochets mobiles supérieurs, aptes à être déplacés verticalement, par paire, par les deux couteaux de déplacement des crochets supérieurs, un premier crochet de chaque paire de crochets supérieurs étant en appui simple sur le second crochet de la paire, l'ensemble de poulies disposées dans la partie médiane du dispositif comportant au moins cinq poulies, parmi lesquelles quatre poulies sont aptes à être déplacées verticalement en fonction des positions des quatre crochets supérieurs, alors que la cinquième poulie, autour de laquelle s'enroule partiellement la cordelette, est apte à être déplacée verticalement par l'attelage, les cinq poulies étant aptes à atteindre au moins six configurations prédéterminées différentes correspondant à quatre positions différentes du mousqueton ;
  • les quatre positions du mousqueton comprennent une position haute, une position basse et deux positions intermédiaires entre les positions haute et basse, chaque position intermédiaire étant accessible à la fois en duite paire et en duite impaire ;
  • les quatre positions du mousqueton sont équidistantes ;
  • la cordelette est disposée de façon à s'enrouler partiellement autour de la cinquième poulie et de deux poulies parmi les quatre poulies du dispositif de formation de la foule commandées par les crochets supérieurs, alors que les quatre crochets supérieurs sont reliés deux par deux par un élément funiculaire s'enroulant partiellement chacun respectivement autour de l'une des deux autres poulies parmi les quatre poulies commandées par les crochets supérieurs ;
  • les poulies de chaque dispositif de formation de la foule sont coplanaires.
According to other advantageous features of a weave mechanism according to the invention, taken separately or in any technically possible combination:
  • the pulley made movable by the hitch is the lower pulley of the set of pulleys arranged in the middle part of the shedding device;
  • the hitch is disposed in a lower portion of the shedding device;
  • the set of pulleys disposed in the middle portion of the shedding device and the or each pulley of the hitch are vertically aligned;
  • the movable end of the cord is provided with a lower movable hook, the lower hook being adapted to be moved by the moving knife of the coupling;
  • each shedding device comprises a selection device adapted to immobilize the lower hook in the vicinity of the bottom dead center of its trajectory;
  • in each shedding device, the lower hook and the carabiner are disposed on two opposite sides of the device;
  • the displacement knife of the hitch is moved according to the position of one of the knives of displacement of the upper hooks;
  • the moving knife of the hitch is movable in a stroke equal to the stroke of the moving knives of the upper hooks;
  • the pulley made mobile by the hitch is movable vertically in a stroke equal to half the stroke of the knives moving the upper hooks;
  • the displacement knife of the hitch is a lower part of one of the knives of displacement of the upper hooks;
  • each shedding device comprises four upper movable hooks, able to be moved vertically, in pairs, by the two knives for moving the upper hooks, a first hook of each pair of upper hooks being in simple support on the second hook of the pair, the set of pulleys arranged in the middle part of the device comprising at least five pulleys, among which four pulleys are able to be displaced vertically according to the positions of the four upper hooks, while the fifth pulley, around which partially winding the cord, is able to be moved vertically by the coupling, the five pulleys being able to reach at least six different predetermined configurations corresponding to four different positions of the carabiner;
  • the four positions of the carabiner comprise a high position, a low position and two intermediate positions between the high and low positions, each intermediate position being accessible both at the same time and in odd number;
  • the four positions of the carabiner are equidistant;
  • the cord is arranged to partially wind around the fifth pulley and two pulleys among the four pulleys of the shedding device controlled by the upper hooks, while the four upper hooks are connected two by two by one funicular element partially winding each respectively around one of the two other pulleys among the four pulleys controlled by the upper hooks;
  • the pulleys of each crowd forming device are coplanar.

L'invention a également pour objet un métier à tisser de type Jacquard équipé d'une mécanique d'armure telle que décrite ci-dessus.The invention also relates to a jacquard loom equipped with a weave mechanism as described above.

Les caractéristiques et avantages de l'invention apparaîtront dans la description qui va suivre d'un mode de réalisation d'une mécanique d'armure pour le positionnement des fils de chaîne d'un métier à tisser de type Jacquard selon l'invention, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés dans lesquels :

  • la figure 1 est une représentation schématique de la configuration des éléments d'un dispositif de formation de la foule appartenant à une mécanique d'armure conforme à l'invention lorsque le mousqueton d'extrémité de la cordelette est en position haute ;
  • les figures 2 et 3 sont des vues analogues à la figure 1 montrant deux configurations différentes des éléments du dispositif de formation de la foule lorsque le mousqueton d'extrémité de la cordelette est dans une première position intermédiaire ;
  • les figures 4 et 5 sont des vues analogues à la figure 1 montrant deux configurations différentes des éléments du dispositif de formation de la foule lorsque le mousqueton d'extrémité de la cordelette est dans une deuxième position intermédiaire ; et
  • la figure 6 est une vue analogue à la figure 1 montrant la configuration des éléments du dispositif de formation de la foule lorsque le mousqueton d'extrémité de la cordelette est en position basse.
The features and advantages of the invention will appear in the following description of an embodiment of a weave mechanism for positioning the warp yarns of a Jacquard loom. according to the invention, given solely by way of example and with reference to the appended drawings in which:
  • the figure 1 is a schematic representation of the configuration of the elements of a shedding device belonging to a weave mechanism according to the invention when the end carabiner of the cord is in the high position;
  • the Figures 2 and 3 are similar views to the figure 1 showing two different configurations of the elements of the shedding device when the end carabiner of the cord is in a first intermediate position;
  • the Figures 4 and 5 are similar views to the figure 1 showing two different configurations of the elements of the crowd-forming device when the end carabiner of the cord is in a second intermediate position; and
  • the figure 6 is a view similar to the figure 1 showing the configuration of the elements of the crowd-forming device when the end carabiner of the cord is in the down position.

Le dispositif 1 de formation de la foule représenté à la figure 1 comporte quatre crochets mobiles supérieurs 2, 3, 6 et 7 aptes à être déplacés verticalement, par paire, par deux couteaux 10 et 11 animés de mouvement alternatifs en opposition de phase. Plus spécifiquement, le dispositif 1 comporte deux crochets mobiles porteurs 2 et 3, qui sont reliés par un câble 4 formant élément funiculaire passant autour d'une poulie 5, et deux crochets mobiles suiveurs 6 et 7, qui sont reliés par un deuxième câble 8 entourant partiellement une deuxième poulie 9. Les couteaux 10 et 11 sont aptes à déplacer sélectivement les crochets porteurs 2 et 3, grâce à des becs de lève 2a et 3a de ces crochets.The device 1 for forming the crowd represented in FIG. figure 1 has four movable upper hooks 2, 3, 6 and 7 adapted to be moved vertically, in pairs, by two knives 10 and 11 animated reciprocating movement in opposition of phase. More specifically, the device 1 comprises two movable carrying hooks 2 and 3, which are connected by a cable 4 forming a funicular element passing around a pulley 5, and two movable follower hooks 6 and 7, which are connected by a second cable 8 partially surrounding a second pulley 9. The knives 10 and 11 are able to selectively move the carrier hooks 2 and 3, with levers 2a and 3a of these hooks.

Les crochets suiveurs 6 et 7 sont respectivement en appui simple sur les crochets porteurs 2 et 3, de sorte que les crochets 2 et 6 peuvent être déplacés ensemble par le couteau 10, de même que les crochets 3 et 7 peuvent être déplacés ensemble par le couteau 11. Ainsi, les crochets 2 et 6 constituent une première paire de crochets mobiles supérieurs, alors que les crochets 3 et 7 constituent une seconde paire de crochets mobiles supérieurs. Un dispositif de sélection 12, comprenant par exemple quatre électro-aimants non représentés et commandés électroniquement, est prévu pour immobiliser les crochets 2, 3, 6 ou 7 au voisinage du point mort haut de la trajectoire qu'ils atteignent en appui sur les couteaux 10 et 11. Un unique dispositif 12 est utilisé pour la sélection des quatre crochets mobiles précités, ce dispositif 12 pouvant être de tout type approprié.The follower hooks 6 and 7 are respectively in single support on the carrier hooks 2 and 3, so that the hooks 2 and 6 can be moved together by the knife 10, as well as the hooks 3 and 7 can be moved together by the knife 11. Thus, the hooks 2 and 6 constitute a first pair of upper movable hooks, while the hooks 3 and 7 constitute a second pair of upper movable hooks. A device 12, comprising for example four electromagnets not shown and electronically controlled, is provided for immobilizing the hooks 2, 3, 6 or 7 in the vicinity of the top dead center of the trajectory they reach in support on the knives 10 and 11 A single device 12 is used for the selection of the four mobile hooks mentioned above, this device 12 being of any suitable type.

Comme il ressort de la comparaison des figures 1 à 6, la hauteur par rapport au bâti non représenté de la mécanique des poulies 5 et 9 situées dans la partie médiane du dispositif 1 est variable en fonction des positions respectives des crochets mobiles supérieurs 2, 3, 6 et 7.As can be seen from the comparison of Figures 1 to 6 , the height relative to the not shown frame of the mechanism of the pulleys 5 and 9 located in the middle part of the device 1 is variable according to the respective positions of the upper mobile hooks 2, 3, 6 and 7.

Le dispositif 1 comporte en outre trois autres poulies 15, 16 et 17 situées dans sa partie médiane, les cinq poulies 5, 9, 15, 16 et 17 étant alignées verticalement, ce qui signifie que les centres des cinq poulies sont disposés sensiblement sur une droite commune de direction verticale. Les quatre poulies supérieures 5, 9, 15 et 16 sont aptes à être déplacées verticalement en fonction des positions des quatre crochets mobiles supérieurs 2, 3, 6 et 7. La cinquième poulie 17 est également apte à être déplacée verticalement sous l'action d'un attelage additionnel, situé dans la partie inférieure du dispositif 1 et comprenant une sixième poulie 19 disposée dans l'alignement vertical des cinq autres poulies. Le déplacement des crochets mobiles supérieurs 2, 3, 6 et 7 et de la sixième poulie inférieure 19 permet d'obtenir six configurations différentes, prédéterminées par construction, des cinq poulies 5, 9, 15, 16 et 17, dans lesquelles l'agencement en hauteur des cinq poulies précitées par rapport au bâti de la mécanique et/ou l'écartement relatif de ces poulies sont différents, comme visible aux figures 1 à 6.The device 1 further comprises three other pulleys 15, 16 and 17 located in its middle part, the five pulleys 5, 9, 15, 16 and 17 being aligned vertically, which means that the centers of the five pulleys are arranged substantially on a common right of vertical direction. The four upper pulleys 5, 9, 15 and 16 are able to be displaced vertically depending on the positions of the four upper movable hooks 2, 3, 6 and 7. The fifth pulley 17 is also able to be moved vertically under the action of an additional hitch, located in the lower part of the device 1 and comprising a sixth pulley 19 disposed in the vertical alignment of the other five pulleys. The displacement of the upper movable hooks 2, 3, 6 and 7 and the sixth lower pulley 19 makes it possible to obtain six different configurations, predetermined by construction, of the five pulleys 5, 9, 15, 16 and 17, in which the arrangement height of the five aforementioned pulleys relative to the frame of the mechanics and / or the relative spacing of these pulleys are different, as visible at Figures 1 to 6 .

De manière avantageuse, les six poulies 5, 9, 15, 16, 17 et 19 du dispositif 1 sont coplanaires, ce qui permet de limiter l'encombrement latéral de l'ensemble qu'elles forment et de simplifier la construction de la mécanique.Advantageously, the six pulleys 5, 9, 15, 16, 17 and 19 of the device 1 are coplanar, which limits the lateral bulk of all they form and simplify the construction of the mechanical.

Un rail de guidage 20 permet de maintenir les quatre poulies supérieures 5, 9, 15 et 16 alignées entre elles. Le rail 20 comporte une lumière oblongue 20a dans laquelle peut être déplacé un coulisseau 21. Les poulies 5 et 15 sont montées sur le coulisseau 21, de telle sorte qu'elles sont libres en rotation et fixes en translation par rapport à ce coulisseau. Les poulies 9 et 16 sont respectivement montées aux extrémités supérieure et inférieure du rail 20, de telle sorte qu'elles sont libres en rotation et fixes en translation par rapport au rail 20. Ainsi, le rail 20 est supporté par la poulie supérieure 9 et mobile en altitude avec celle-ci. Par ailleurs, la cinquième poulie 17 et la sixième poulie 19 sont montées sur un deuxième coulisseau 18, de telle sorte qu'elles sont libres en rotation et fixes en translation par rapport à ce deuxième coulisseau. Le coulisseau 18 est mobile en translation par rapport au bâti de la mécanique et guidé en translation par une glissière non représentée.A guide rail 20 keeps the four upper pulleys 5, 9, 15 and 16 aligned with each other. The rail 20 comprises an oblong slot 20a in which a slider 21 can be moved. The pulleys 5 and 15 are mounted on the slider 21, so that they are free in rotation and fixed in translation relative to this slider. The pulleys 9 and 16 are respectively mounted at the upper and lower ends of the rail 20, so that they are free in rotation and fixed in translation relative to the rail 20. Thus, the rail 20 is supported by the upper pulley 9 and mobile at altitude with the this. Furthermore, the fifth pulley 17 and the sixth pulley 19 are mounted on a second slider 18, so that they are free to rotate and fixed in translation relative to this second slider. The slider 18 is movable in translation relative to the frame of the machine and guided in translation by a slider not shown.

Une cordelette 23 est fixée, par une de ses extrémités, à une embase 22 solidaire du bâti de la mécanique et passe successivement autour de la poulie 16, de la poulie 17, puis de la poulie 15 et pend en dessous de la poulie 15. La seconde extrémité de la cordelette 23 porte un mousqueton 24 permettant la suspension d'une lisse non représentée de commande de la position de fils de chaîne.A cord 23 is fixed, at one of its ends, to a base 22 secured to the frame of the mechanism and passes successively around the pulley 16, the pulley 17, then the pulley 15 and hangs below the pulley 15. The second end of the cord 23 carries a carabiner 24 for suspending a not shown control line of the son of warp position.

Un fil d'arcade non représenté est accroché au mousqueton 24 et permet de commander le mouvement vertical alternatif de la lisse correspondante, à l'encontre d'un effort élastique exercé par un ressort reliant l'extrémité inférieure de la lisse au bâti du métier à tisser équipé de la mécanique d'armure. En variante, plusieurs fils d'arcade peuvent être accrochés au mousqueton 24, ce qui permet de commander plusieurs lisses avec ce mousqueton. L'ensemble des fils d'arcade accrochés aux différents mousquetons forme le harnais de la mécanique.A not shown arch wire is hooked to the carabiner 24 and makes it possible to control the vertical reciprocating movement of the corresponding rail, against an elastic force exerted by a spring connecting the lower end of the rail to the frame of the loom weaving machine equipped with armor mechanics. Alternatively, several arcade son can be hooked to the carabiner 24, which allows to control several smooth with this carabiner. The set of archwires attached to the various carabiners form the harness of mechanics.

De plus, l'attelage additionnel comprend un cordon 25, qui est fixé par une de ses extrémités à une deuxième embase 26 solidaire du bâti de la mécanique et passe autour de la sixième poulie 19. La seconde extrémité du cordon 25, située du côté opposé au mousqueton 24, est munie d'un crochet mobile inférieur 27. Le crochet mobile inférieur 27 est apte à être déplacé verticalement par un couteau inférieur 31 animé d'un mouvement en phase avec le mouvement du couteau 11 et de course H égale à celle des couteaux 10 et 11.In addition, the additional hitch comprises a bead 25, which is fixed at one of its ends to a second base 26 secured to the frame of the machine and passes around the sixth pulley 19. The second end of the bead 25, located on the side opposite the carabiner 24, is provided with a lower mobile hook 27. The lower mobile hook 27 is adapted to be moved vertically by a lower knife 31 driven in a movement in phase with the movement of the knife 11 and stroke H equal to that of the knives 10 and 11.

Le fonctionnement est le suivant :The operation is as follows:

En partant de la configuration de la figure 1 qui correspond à une position haute du mousqueton 24, lorsque le couteau 10 est animé d'un mouvement vertical vers le bas, si le dispositif de sélection 12 retient à la fois le crochet porteur 2 et le crochet suiveur 6, les quatre poulies supérieures 5, 9, 15 et 16 restent immobiles. Simultanément, le couteau inférieur 31, accompagné du crochet mobile inférieur 27, se déplace verticalement vers le haut. Du fait de la tension de la cordelette 23 due aux lisses accrochées au mousqueton 24, la poulie 17 tend à remonter vers les crochets 2, 3, 6 et 7. Dans la position de la figure 1, la tension de la cordelette 25 et sa configuration imposée par le couteau 31 en position basse s'opposent à la remontée de la poulie 17. Par contre, lorsque le couteau 31, accompagné du crochet inférieur 27 auquel est attaché le cordon 25, remonte, le cordon 25 ne bloque plus la poulie 19 qui peut remonter vers une position haute visible à la figure 2, en étant soulevée par la poulie 17 avec laquelle elle conserve un écartement fixe dû au coulisseau 18. Les cinquième et sixième poulies 17 et 19, montent alors d'une hauteur H/2 égale à la moitié de la course du couteau inférieur 31. La longueur de la partie de cordelette 23 qui entoure successivement les poulies 16, 17 et 15 est donc moindre, de sorte que la longueur de la partie de cordelette 23 qui pend au-delà de la poulie 15 est supérieure à celle de la configuration de la figure 1. Le mousqueton 24 descend alors d'une hauteur égale à la course H des couteaux du dispositif 1 et atteint ainsi une première position intermédiaire, représentée à la figure 2.Starting from the configuration of the figure 1 which corresponds to a high position of the carabiner 24, when the knife 10 is animated by a movement vertical down, if the selection device 12 holds both the carrier hook 2 and the follower hook 6, the four upper pulleys 5, 9, 15 and 16 remain stationary. Simultaneously, the lower knife 31, accompanied by the lower movable hook 27, moves vertically upwards. Due to the tension of the cord 23 due to the hinges attached to the carabiner 24, the pulley 17 tends to rise towards the hooks 2, 3, 6 and 7. In the position of the figure 1 , the tension of the cord 25 and its configuration imposed by the knife 31 in the low position oppose the raising of the pulley 17. On the other hand, when the knife 31, accompanied by the lower hook 27 to which the cord 25 is attached, goes back , the cord 25 no longer blocks the pulley 19 which can go back to a high position visible to the figure 2 , being lifted by the pulley 17 with which it maintains a fixed spacing due to the slide 18. The fifth and sixth pulleys 17 and 19, then rise by a height H / 2 equal to half the stroke of the lower knife 31. The length of the rope portion 23 which successively surrounds the pulleys 16, 17 and 15 is therefore smaller, so that the length of the rope portion 23 which hangs beyond the pulley 15 is greater than that of the rope configuration. the figure 1 . The carabiner 24 then descends from a height equal to the stroke H of the knives of the device 1 and thus reaches a first intermediate position, represented in FIG. figure 2 .

En partant toujours de la configuration de la figure 1, si le crochet suiveur 6 est maintenu en position haute par le dispositif de sélection 12 et si le crochet porteur 2 est libéré, de telle sorte qu'il accompagne le couteau 10 dans son mouvement de descente, la poulie 9 reste en position alors que la poulie 5 descend pour atteindre la position de la figure 4. La poulie 15, dont l'écartement est fixe par rapport à la poulie 5, descend alors d'une hauteur H/2 égale à la moitié de la course du couteau 10. Simultanément, le couteau inférieur 31 accompagné du crochet inférieur 27 se déplace verticalement vers le haut, de telle sorte que la sixième poulie 19 monte pour atteindre sa position haute, ce qui correspond à une montée d'une hauteur H/2 de la cinquième poulie 17. Ainsi, la longueur de la partie de cordelette 23 enroulée successivement autour des poulies 16, 17 et 15 est diminuée de H + H = 2H, soit deux fois la course H des couteaux du dispositif 1. Le mousqueton 24 descend alors d'une hauteur 2H et atteint ainsi une deuxième position intermédiaire, représentée à la figure 4.Starting from the configuration of the figure 1 , if the follower hook 6 is held in the up position by the selection device 12 and if the carrier hook 2 is released, so that it accompanies the knife 10 in its downward movement, the pulley 9 remains in position while the pulley 5 goes down to reach the position of the figure 4 . The pulley 15, whose spacing is fixed relative to the pulley 5, then descends by a height H / 2 equal to half the stroke of the knife 10. Simultaneously, the lower knife 31 accompanied by the lower hook 27 moves vertically upwards, so that the sixth pulley 19 rises to reach its high position, which corresponds to a rise of a height H / 2 of the fifth pulley 17. Thus, the length of the cord portion 23 wound successively around the pulleys 16, 17 and 15 is decreased by H + H = 2H, twice the stroke H of 1. The carabiner 24 then descends by a height 2H and thus reaches a second intermediate position, represented in FIG. figure 4 .

En partant de la configuration de la figure 1, si le dispositif de sélection 12 ne retient ni le crochet porteur 2, ni le crochet suiveur 6, ce sont à la fois les poulies 5 et 9 qui ont un mouvement de translation vers le bas d'une hauteur H/2. La poulie 16, dont la position est fixe par rapport à la poulie 9, descend alors d'une hauteur H/2 et la poulie 15 descend également d'une hauteur H/2. Simultanément, la montée du couteau inférieur 31 accompagné du crochet inférieur 27 permet le mouvement de la sixième poulie 19 vers sa position haute, et la cinquième poulie 17, dont la position est fixe par rapport à la poulie 19, monte d'une hauteur H/2. Il en résulte une diminution de la longueur de la partie de cordelette 23 enroulée successivement autour des poulies 16, 17 et 15 de H + H + H = 3H, soit trois fois la course H des couteaux du dispositif 1. Le mousqueton 24 descend alors d'une hauteur 3H pour atteindre une position basse représentée à la figure 6.Starting from the configuration of the figure 1 , if the selection device 12 holds neither the carrier hook 2 nor the follower hook 6, it is both the pulleys 5 and 9 which have a translational movement down a height H / 2. The pulley 16, whose position is fixed relative to the pulley 9, then descends by a height H / 2 and the pulley 15 also descends by a height H / 2. Simultaneously, the rise of the lower knife 31 accompanied by the lower hook 27 allows the movement of the sixth pulley 19 to its upper position, and the fifth pulley 17, whose position is fixed relative to the pulley 19, rises by a height H / 2. This results in a decrease in the length of the cord portion 23 wound successively around the pulleys 16, 17 and 15 of H + H + H = 3H, three times the stroke H of the knives of the device 1. The carabiner 24 then drops from a height 3H to reach a low position shown in FIG. figure 6 .

Chaque dispositif 1 d'une mécanique d'armure conforme à ce mode de réalisation permet ainsi d'obtenir quatre positions équidistantes du mousqueton 24, le pas entre deux positions voisines étant égal à la course H des couteaux du dispositif 1. Telles que décrites ci-dessus, les deux positions intermédiaires sont accessibles en duite impaire. Toutefois, ces deux positions intermédiaires sont également accessibles en duite paire, comme montré par les configurations des figures 3 et 5, pour lesquelles un raisonnement en terme de déplacement des poulies peut être mené, comme pour les figures 2 et 4. La position haute du mousqueton 24 n'est accessible que pour une duite paire, alors que la position basse n'est accessible que pour une duite impaire.Each device 1 of a weave mechanism according to this embodiment thus makes it possible to obtain four equidistant positions of the carabiner 24, the pitch between two adjacent positions being equal to the stroke H of the knives of the device 1. As described herein above, the two intermediate positions are accessible oddly. However, these two intermediate positions are also accessible evenly, as shown by the configurations of the figures 3 and 5 , for which a reasoning in terms of displacement of the pulleys can be carried out, as for the figures 2 and 4 . The high position of the carabiner 24 is only accessible for one pair pick, while the lower position is only accessible for an odd pick.

Dans la mécanique d'armure du mode de réalisation décrit, les dispositifs 1 de formation de la foule sont avantageusement rassemblés par groupes de huit dispositifs pour former un module apte à être disposé de façon unitaire dans la mécanique. En variante, le nombre de dispositifs d'un module peut être différent de huit.In the weave mechanics of the described embodiment, the shedding devices 1 are advantageously grouped into groups of eight devices to form a module that can be arranged unitarily in the mechanism. Alternatively, the number of devices of a module may be different from eight.

Grâce au dispositif 1 conforme à l'invention, les possibilités de tissage de tapis à poils et à boucles sont améliorées puisque les positions intermédiaires sont accessibles à la fois en duite paire et impaire, la formation des poils du tapis restant garantie avec les positions haute et basse accessibles l'une après l'autre.Thanks to the device 1 according to the invention, the possibilities of weaving of pile and loop carpets are improved since the intermediate positions are accessible both as even and odd duits, the formation of the remaining carpet hairs guaranteed with the high and low positions accessible one after the other.

De plus, comme le dispositif 1 conforme à l'invention permet d'atteindre quatre positions, dont deux positions intermédiaires accessibles à la fois en duites paire et impaire, il peut être utilisé dans des applications de tissage de tapis sans qu'il y ait de distinction de construction, ni de distinction de mode de commande, entre le dispositif d'actionnement d'un fil de poil de la nappe supérieure et le dispositif d'actionnement d'un fil de poil de la nappe inférieure. En outre, tous les dispositifs 1 d'une mécanique d'armure conforme à l'invention sont commandés directement par les couteaux 10, 11 et 31. La démultiplication de l'amplitude de mouvement des couteaux, qui permet d'obtenir un déplacement des poulies 15, 16 et 17 avec des courses compatibles avec les quatre positions du mousqueton 24 à atteindre, est assurée par des éléments internes au dispositif 1 et est la même pour tous les dispositifs de la mécanique, ce qui simplifie avantageusement la construction d'un métier à tisser incorporant une telle mécanique et en diminue l'encombrement.In addition, since the device 1 according to the invention makes it possible to reach four positions, of which two intermediate positions are accessible both at odd and even ends, it can be used in carpet weaving applications without there being of distinction of construction, or distinction of control mode, between the device for actuating a pile thread of the upper sheet and the device for actuating a pile thread of the lower sheet. In addition, all the devices 1 of a weave mechanism according to the invention are controlled directly by the knives 10, 11 and 31. The multiplication of the movement amplitude of the knives, which makes it possible to obtain a movement of pulleys 15, 16 and 17 with strokes compatible with the four positions of the carabiner 24 to be achieved, is provided by elements internal to the device 1 and is the same for all devices of the mechanics, which advantageously simplifies the construction of a loom incorporating such a mechanism and decreases the size.

Grâce au dispositif 1 conforme à l'invention, les trois poulies 15, 16 et 17, responsables du mouvement du mousqueton 24, peuvent se déplacer indépendamment les unes des autres en duites paire et impaire. En adaptant pour la poulie 17 un déplacement de course H/2, les quatre positions proposées pour le mousqueton 24 sont régulièrement espacées, ce qui optimise les ouvertures de foule et donc les efforts sur le métier à tisser. De plus, l'alignement vertical des éléments constitutifs du dispositif 1 permet de limiter son encombrement. Un métier à tisser équipé d'une mécanique d'armure selon l'invention présente ainsi une bonne compacité.Thanks to the device 1 according to the invention, the three pulleys 15, 16 and 17, responsible for the movement of the carabiner 24, can move independently of each other in even and odd picks. By adapting for the pulley 17 an H / 2 stroke displacement, the four positions proposed for the carabiner 24 are evenly spaced, which optimizes the shed openings and therefore the efforts on the loom. In addition, the vertical alignment of the constituent elements of the device 1 makes it possible to limit its bulk. A loom equipped with a weave mechanism according to the invention thus has a good compactness.

L'invention n'est pas limitée à l'exemple décrit et représenté. En particulier, selon une première variante non représentée de l'invention, les couteaux 11 et 31 peuvent être remplacés par deux parties d'un unique couteau 11 dimensionné pour atteindre à la fois les crochets supérieurs 3 et 7 et le crochet inférieur 27. L'utilisation d'un tel couteau 11 long permet de gagner en encombrement, grâce à la suppression d'un dispositif d'actionnement de couteau. De plus, la commande mécanique du dispositif 1 est alors identique à celle d'un dispositif classique comportant deux couteaux déplaçables en opposition de phase, malgré la présence du crochet inférieur 27 supplémentaire. On peut également envisager de monter certains dispositifs 1 d'un métier à tisser conforme à l'invention, actionnés par les mêmes couteaux gauche et droit, avec le crochet inférieur 27 disposé du côté des crochets supérieurs gauches du dispositif 1 et d'autres dispositifs 1 avec le crochet inférieur 27 disposé du côté des crochets supérieurs droits du dispositif 1, le dispositif 1 étant alors retourné selon une rotation de 180° autour de l'axe d'alignement des poulies. On obtient ainsi un système totalement équilibré, avec deux couteaux 10 et 11 tous deux dimensionnés pour atteindre à la fois les crochets supérieurs et le crochet inférieur et ne supportant chacun que la moitié des crochets inférieurs. Par ailleurs, l'effort de rappel exercé par le harnais du métier à tisser tend à tirer les poulies 17 et 19 vers le haut, si bien que le contact entre le crochet inférieur 27 et le couteau 11 est maintenu à tout moment du mouvement du couteau. L'effort exercé par le crochet inférieur 27 sur la face inférieure du couteau 11 s'oppose aux efforts exercés par les crochets supérieurs 3 et 7 sur la face supérieure du couteau 11, de sorte que le crochet 27 supplémentaire ne sollicite pas davantage le couteau 11 à la flexion.The invention is not limited to the example described and shown. In particular, according to a first variant not shown of the invention, the knives 11 and 31 can be replaced by two parts of a single knife 11 sized to reach both the upper hooks 3 and 7 and the lower hook 27. L The use of such a long knife 11 saves space, thanks to the removal of a knife actuating device. In addition, the mechanical control of the device 1 is then identical to that of a conventional device comprising two movable knives in phase opposition, despite the presence of the additional lower hook 27. It is also possible to envisage mounting certain devices 1 of a loom according to the invention, actuated by the same left and right knives, with the lower hook 27 arranged on the side of the upper left hooks of the device 1 and other devices. 1 with the lower hook 27 disposed on the side of the upper right hooks of the device 1, the device 1 then being returned in a rotation of 180 ° around the axis of alignment of the pulleys. This produces a totally balanced system, with two knives 10 and 11 both sized to reach both the upper hooks and the lower hook and each supporting only half of the lower hooks. Furthermore, the return force exerted by the harness of the loom tends to pull the pulleys 17 and 19 upwards, so that the contact between the lower hook 27 and the knife 11 is maintained at all times of the movement of the knife. The force exerted by the lower hook 27 on the underside of the knife 11 opposes the forces exerted by the upper hooks 3 and 7 on the upper face of the knife 11, so that the additional hook 27 does not require more knife 11 to bending.

Selon une deuxième variante non représentée de l'invention, le crochet inférieur 27 peut être associé à un dispositif de sélection électronique, analogue au dispositif de sélection 12 des crochets supérieurs. Le crochet inférieur 27 ne suit alors le mouvement du couteau inférieur 31 que si la commande électronique suspend le maintien de ce crochet dans sa position inférieure. Ainsi, il est possible de maintenir la poulie 19, et donc la poulie 17, en position basse lors des duites impaires. Trois configurations supplémentaires du dispositif 1 sont alors possibles, de sorte que la position haute et les deux positions intermédiaires sont accessibles à la fois en duite paire et impaire, alors que la position basse reste accessible uniquement en duite impaire. Dès lors, il est possible de conserver la position haute et les deux positions intermédiaires sur deux duites consécutives, en appliquant à la duite suivante une sélection symétrique des crochets supérieurs, ce qui limite les pièces à déplacer pour conserver une même position du mousqueton 24.According to a second variant not shown of the invention, the lower hook 27 may be associated with an electronic selection device, similar to the selection device 12 of the upper hooks. The lower hook 27 then follows the movement of the lower knife 31 if the electronic control suspends the maintenance of the hook in its lower position. Thus, it is possible to maintain the pulley 19, and therefore the pulley 17, in the lower position during the odd picks. Three additional configurations of the device 1 are then possible, so that the upper position and the two intermediate positions are accessible both odd and even, while the lower position remains accessible only odd. Therefore, it is possible to keep the upper position and the two intermediate positions on two consecutive picks, by applying to the next pick a symmetrical selection of the upper hooks, which limits the parts to move to maintain the same position of the carabiner 24.

Claims (17)

  1. Weaving mechanism for positioning the warp yarns of a Jacquard-type loom, comprising at least one shed-forming device (1), each shed-forming device comprising at least two upper moveable hooks (2, 3, 6, 7) positioned in an upper part of the device and able to be moved vertically by two knives (10, 11) driven in reciprocating movements in phase opposition, each shed-forming device further comprising a set of pulleys (5, 9, 15, 16, 17) aligned vertically in a central part of the device, the set of pulleys comprising pulleys (15, 16, 17) around which there is partially wrapped a cord (23) which is equipped at one end with a snap hook (24) adapted to be fastened to a heddle, some of the pulleys (15, 16) around which the cord (23) is wrapped being able to be moved vertically according to the positions of the upper hooks (2, 3, 6, 7), characterized in that one (17) of the pulleys around which the cord (23) is wrapped can be moved vertically by a coupling comprising at least one rope (25) which is wrapped around at least one additional pulley (19) secured in terms of translational movement to the pulley (17) rendered mobile by the coupling, the rope (25) being fixed by one of its ends to the frame of the weaving mechanism, while the other end of the rope (25) is able to be moved by a knife (31) that moves the coupling (19, 25).
  2. Weaving mechanism according to Claim 1, characterized in that the pulley (17) rendered mobile by the coupling (19, 25) is the lower pulley of the set of pulleys (5, 9, 15, 16, 17) positioned in the central part of the shed-forming device (1).
  3. Weaving mechanism according to Claim 2, characterized in that the coupling (19, 25) is positioned in a lower part of the shed-forming device (1).
  4. Weaving mechanism according to any one of the preceding claims, characterized in that the set of pulleys (5, 9, 15, 16, 17) positioned in the central part of the shed-forming device (1) and the or each pulley (19) of the coupling (19, 25) are vertically aligned.
  5. Weaving mechanism according to any one of the preceding claims, characterized in that the moveable end of the rope (25) is fitted with a lower moveable hook (27), this lower hook (27) being able to be moved by the knife (31) that moves the coupling (19, 25).
  6. Weaving mechanism according to Claim 5, characterized in that each shed-forming device (1) comprises a selection device able to immobilize the lower hook (27) in the proximity of the bottom dead centre position of its trajectory.
  7. Weaving mechanism according to any one of Claims 5 and 6, characterized in that, in each shed-forming device (1), the lower hook (27) and the snap hook (24) are positioned on two opposite sides of the device.
  8. Weaving mechanism according to any one of the preceding claims, characterized in that the knife (31) that moves the coupling (19, 25) is moved according to the position of one (11) of the knives that move the upper hooks (2, 3, 6, 7).
  9. Weaving mechanism according to any one of the preceding claims, characterized in that the knife (31) that moves the coupling (19, 25) is able to move through a travel (H) equal to the travel (H) of the knives (10, 11) that move the upper hooks (2, 3, 6, 7).
  10. Weaving mechanism according to any one of the preceding claims, characterized in that the pulley (17) rendered mobile by the coupling (19, 25) is able to move vertically through a travel (H/2) equal to half the travel (H) of the knives (10, 11) that move the upper hooks (2, 3, 6, 7).
  11. Weaving mechanism according to any one of the preceding claims, characterized in that the knife (31) that moves the coupling (19, 25) is a lower part of one of the knives (11) that move the upper hooks (2, 3, 6, 7).
  12. Weaving mechanism according to any one of the preceding claims, characterized in that each shed-forming device (1) comprises four upper moveable hooks (2, 3, 6, 7) able to be moved vertically, in pairs, by the two knives (10, 11) that move the upper hooks, a first hook (6, 7) of each pair of upper hooks simply resting against the second hook (2, 3) of the pair, the set of pulleys positioned in the central part of the device comprising at least five pulleys (5, 9, 15, 16, 17) of which four pulleys (5, 9, 15, 16) can be moved vertically according to the positions of the four upper hooks (2, 3, 6, 7), while the fifth pulley (17), around which the cord (23) is partially wrapped, can be moved vertically by the coupling (19, 25), the five pulleys (5, 9, 15, 16, 17) being able to attain at least six different predetermined configurations corresponding to four different positions of the snap hook (24).
  13. Weaving mechanism according to Claim 12, characterized in that the four positions of the snap hook (24) comprise a raised position, a lowered position, and two intermediate positions between the raised and lowered positions, each intermediate position being accessible both for even pick and for odd pick.
  14. Weaving mechanism according to any one of Claims 12 and 13, characterized in that the four positions of the snap hook (24) are equally spaced.
  15. Weaving mechanism according to any one of Claims 12 to 14, characterized in that the cord (23) is positioned in such a way that it is wrapped partially around the fifth pulley (17) and around two pulleys (15, 16) of the four pulleys (5, 9, 15, 16) of the shed-forming device that are controlled by the upper hooks (2, 3, 6, 7), while the four upper hooks (2, 3, 6, 7) are connected in pairs by a funicular element (4, 8), each funicular element (4, 8) being wrapped partially around a respective one (5, 9) of the other two pulleys (5, 9) of the four pulleys (5, 9, 15, 16) that are controlled by the upper hooks.
  16. Weaving mechanism according to any one of the preceding claims, characterized in that the pulleys (5, 9, 15, 16, 17, 19) of each shed-forming device (1) are coplanar.
  17. Jacquard-type loom, characterized in that it is equipped with a weaving mechanism according to any one of the preceding claims.
EP20070356179 2006-12-26 2007-12-21 Shed forming device in a Jacquard loom, and Jacquard loom equipped with such a device Active EP1939338B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0611358A FR2910495B1 (en) 2006-12-26 2006-12-26 ARMOR MECHANICS AND JACQUARD TYPE WEAVING EQUIPPED WITH SUCH A MACANIQUE.

Publications (2)

Publication Number Publication Date
EP1939338A1 EP1939338A1 (en) 2008-07-02
EP1939338B1 true EP1939338B1 (en) 2009-09-30

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Application Number Title Priority Date Filing Date
EP20070356179 Active EP1939338B1 (en) 2006-12-26 2007-12-21 Shed forming device in a Jacquard loom, and Jacquard loom equipped with such a device

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EP (1) EP1939338B1 (en)
CN (1) CN101240472B (en)
DE (1) DE602007002610D1 (en)
FR (1) FR2910495B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104120533B (en) * 2013-04-25 2015-11-25 涟水天宫云锦织造有限公司 The special pulling apparatus of Nanjing brocade secondary jacquard
CN104372486B (en) * 2013-08-14 2016-12-28 王伯奇 Time difference electric magnet jacquard weave choosing is through mechanism and selects through method
BE1025414B1 (en) * 2017-07-20 2019-02-20 Nv Michel Van De Wiele GAAP FORMAT FOR A WEAVING MACHINE
CN107700012A (en) * 2017-11-20 2018-02-16 常熟纺织机械厂有限公司 Electronic jacquard machine selecting needle assembly
EP3739092B1 (en) * 2019-05-13 2023-07-19 Stäubli Italia S.p.A. Shedding device for labelling on selvedges or on fabrics on a weaving loom and method for adjusting such a shedding device
CN112725977A (en) * 2020-12-25 2021-04-30 上海超诚电子科技有限公司 Novel pulley assembly, opening assembly and jacquard for jacquard

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1008209A4 (en) 1993-04-23 1996-02-13 Wiele Michel Van De Nv Jacquard.
FR2715666B1 (en) * 1994-01-28 1996-05-03 Staubli Verdol Weave mechanics capable of generating four positions of warp threads in a loom.
BE1008975A5 (en) * 1994-12-20 1996-10-01 Wiele Michel Van De Nv Jacquard WITH rigging.
FR2754277B1 (en) * 1996-10-04 1998-12-18 Staubli Lyon THREE-POSITION WEAPON MECHANICS AND JACQUARD-LIKE WEAVING EQUIPPED WITH SUCH MECHANICS
BE1011210A3 (en) * 1997-06-12 1999-06-01 Wiele Michel Van De Nv FOUR TEETH OPEN GAAP jacquard.
EP0940489A1 (en) * 1998-02-06 1999-09-08 Kornblit Amnon Tackle device for Jacquard machines

Also Published As

Publication number Publication date
CN101240472B (en) 2011-11-09
FR2910495B1 (en) 2009-01-30
DE602007002610D1 (en) 2009-11-12
FR2910495A1 (en) 2008-06-27
EP1939338A1 (en) 2008-07-02
CN101240472A (en) 2008-08-13

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