EP0263764A1 - Device to change the warp density in looms - Google Patents

Device to change the warp density in looms Download PDF

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Publication number
EP0263764A1
EP0263764A1 EP87420230A EP87420230A EP0263764A1 EP 0263764 A1 EP0263764 A1 EP 0263764A1 EP 87420230 A EP87420230 A EP 87420230A EP 87420230 A EP87420230 A EP 87420230A EP 0263764 A1 EP0263764 A1 EP 0263764A1
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EP
European Patent Office
Prior art keywords
boards
support
drip
warp
return
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Granted
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EP87420230A
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German (de)
French (fr)
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EP0263764B1 (en
Inventor
Jacques Brochier
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TISSAGE PAR LEVEE INDIVIDUELLE DE FILS
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TISSAGE PAR LEVEE INDIVIDUELLE DE FILS
J BROCHIER SOIERIES
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D03C3/38—Comber boards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D03C3/40—Constructions of lifting-cords

Definitions

  • the present invention relates to a device for varying the density of warp threads in a weaving loom.
  • the warp threads which are parallel to each other and which define a ply are associated with means allowing their selective displacement perpendicular to the plane which they define, in order to allow the introduction of the weft threads between the raised threads and those who are not, defining the crowd.
  • control threads each of which is equipped, at one of its ends, with a loop which is crossed by a warp thread, and the other end of which is fixed to a motion control hook.
  • control threads each of which is equipped, at one of its ends, with a loop which is crossed by a warp thread, and the other end of which is fixed to a motion control hook.
  • the machines have a fixed size and a number of control hooks limited to 1,344. This number is insufficient in the case of weaving fine threads, so that several warp threads intended to be lifted at the same time must be connected to the same control hook.
  • the assembly of control wires or harnesses can form a straight harness 2, as shown in FIG. 1 of the drawing, in the case of a mechanical drawing falling on a chain, or form a propeller 3, as shown in FIG. 2, in the case of a lateral fall to the left or to the right.
  • the connecting wires 4 between the control hooks, bearing the reference 5 in FIGS. 2 and 3, and the warp wires pass through a drip board 6, that is to say a board comprising a hole 7 for the passage of each control wire 4, and ensuring ordering of the wires and putting them in line with the corresponding warp wire.
  • Each warp thread is further subjected to the action of spring or elastic return elements, fixed on a hanging beam, and arranged, with respect to the ply of warp threads, on the side opposite that of which find the control wires, these return elements ensuring the return of each chain wire to its initial position when the action exerted on it by the control wire ceases.
  • the grouting board determines the density of the fabric.
  • FIG. 3 represents a fixed control unit 8, as well as two possibilities of arrangement of the control wires resulting from two uses of the grading board.
  • the warp threads are in the same plane.
  • the warp threads are arranged on a curved surface, preventing the introduction of the weft.
  • the present invention aims to remedy these drawbacks by providing a device making it possible to vary the density of the fabric simply and quickly, without dismantling the harness.
  • the device which it concerns comprises in combination an individual control system for each warp thread, of position adjustable on a support, and a series of drip boards, arranged substantially parallel to the warp threads, each comprising a plurality of holes for the passage of a corresponding number of threads for controlling the warp threads, these boards being mounted on their support with the possibility of adjusting their number and their spacing.
  • control hooks are grouped on a certain number of modules, each module being mounted in an adjustable manner with locking in the desired position, on a support integral with the frame of the apparatus, and the boards each has a number of holes for the passage of the control wires, this number being a submultiple of the number of hooks of a module.
  • the number of hooks of a module is 576, while the number of holes made in a drip tray is 96.
  • the width of each drip board is 9.6 mm.
  • the modules In such a configuration, the modules must be grouped in pairs, and undergo head-to-tail mounting.
  • the means for returning the warp yarns comprise boards situated below the ply of warp yarns and occupying the same arrangement as the drip boards, these boards being for this purpose mounted adjustable on their support, this support being itself mounted vertically movable by means of a jack between a position corresponding to the working position in which the control wires are stretched, and a relaxed position. This relaxed position is that which is adopted prior to a modification of the density of the tissue.
  • the adjustment of the drip boards as well as of the return boards can be obtained in different ways and in particular by engagement of the ends of the boards in the notches formed at determined spacings in two strips, by mounting between the dowel boards of spacers of width corresponding to the width desired between two boards, or by mounting boards on their support with the use of indexing means and locking means with screw or eccentric for example.
  • each control wire 4 is associated with an independent control hook. These hooks are grouped at the level of modules 9, each module comprising 576 hooks distributed by 24 plates of 24 hooks.
  • Each wire passes through a hole 10 formed in a drip board 12.
  • Each drip board 12 with a width of 9.6 mm has 93 holes 10 arranged in four parallel lines 13, each of a length of the order 120 mm.
  • a number of boards, depending on the width of the fabric and the density of the warp threads, must be arranged parallel to each other, in the direction of the warp threads.
  • the boards 12 are arranged on a raking rule 13 having two stops 14 at the ends.
  • the boards are contiguous, which corresponds to a maximum density of the wires.
  • the drip boards 12 are kept apart from each other by intermediate boards 15, which makes it possible to obtain a lower density of warp yarns.
  • the drip rule 13a has a graduated scale 16 and is equipped with a locking plate 17 in which is formed a longitudinal light 18.
  • Each drip board is provided with '' a threaded rod 19 allowing its locking on the plate 17 using a nut 20 after locating the position of each board using an index 22 located opposite the scale 16.
  • the devices described above in the case of tipping boards apply just as well to the return boards 23 which are arranged under the ply of warp threads, and which must each occupy a position corresponding to that of a board drip.
  • the drip boards 23 have holes 24 for the passage of elastic elements 25, one end of which is fixed to the loop 26 crossed by the warp thread and the movement of which is given by a control wire 4.
  • the various return boards are mounted on the same support 27, and that this support is vertically movable by means of a jack 28 between a working position in which the return of the warp threads is carried out and an adjustment position in which the return means are relaxed.
  • FIG. 8 represents a device intended for the production of a fabric whose warp threads have a low or medium density, that is to say less than 46.8 threads per centimeter.
  • a certain number of modules 9, depending on the width of the fabric to be produced, are arranged in line, that is to say parallel to each other on the same support.
  • the spacing between these modules can be adjusted, after loosening the fixing means 29 of each module and sliding of an arm 30 secured to this module on a shaft 32 secured to the fixed support 33.
  • the arms 30 of the different modules can be blocked on the shaft 32 by eccentric means 34, and the position of each module can be determined with precision by means of a graduated scale 35 which comprises the support 33.
  • the modules are grouped in pairs, the two modules of the same pair being arranged head to tail, as shown in the figure 9.
  • two control shafts should be provided, that is to say one shaft for each series of modules.
  • the invention approves a great improvement to the existing technique by providing a device of simple design, which has been described above in the case of manual adjustment but which could be very easily automated. It goes without saying that the invention is not limited to the sole embodiments of this device described above by way of examples; on the contrary, it embraces all of its variant embodiments. Thus, for example, the number of hooks per module could be different, as well as the dimensions and the number of holes in the drip and recall boards, without going beyond the ambit of the invention. .

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

Abstract

Ce dispositif comprend en combinaison un système individuel de commande de chaque fil de chaîne, de position réglable sur un support, et une série de planchettes d'empoutage (12) disposées sensiblement parallèlement les unes aux autres et orientées sensiblement parallèlement aux fils de chaîne, comportant chacune une pluralité de trous pour le passage d'un nombre correspondant de fils de commande (4) des fils de chaîne, ces planchettes étant montées sur leur support (13) avec possibilité de réglage de leur nombre et de leur écartement. Application à l'équipement de métiers à tisser.This device comprises in combination an individual control system for each warp thread, of position adjustable on a support, and a series of drip boards (12) arranged substantially parallel to each other and oriented substantially parallel to the warp threads, each comprising a plurality of holes for the passage of a corresponding number of control wires (4) of the warp wires, these boards being mounted on their support (13) with the possibility of adjusting their number and their spacing. Application to the equipment of looms.

Description

La présente invention a pour objet un dispositif de variation de la densité des fils de chaîne dans un métier à tisser.The present invention relates to a device for varying the density of warp threads in a weaving loom.

Dans un métier à tisser, les fils de chaîne parallèles entre eux, et définissant une nappe sont associés à des moyens permettant leur déplacement sélectif perpendiculairement au plan qu'ils définissent, afin de permettre l'introduction des fils de trame entre les fils soulevés et ceux qui ne le sont pas, définissant la foule.In a weaving loom, the warp threads which are parallel to each other and which define a ply are associated with means allowing their selective displacement perpendicular to the plane which they define, in order to allow the introduction of the weft threads between the raised threads and those who are not, defining the crowd.

Le déplacement des fils de chaîne est réalisé par l'intermédiaire de fils de commande dont chacun est équipé, à l'une de ses extrémités, d'une boucle qui est traversée par un fil de chaîne, et dont l'autre extrémité est fixée à un crochet de commande du mouvement. Actuellement, les machines ont un encombrement fixe et un nombre de crochets de commande limité à 1 344. Ce nombre est insuffisant dans le cas de tissage de fils fins, de telle sorte que plusieurs fils de chaîne destinés à être soulevés au même moment doivent être reliés à un même crochet de commande.The movement of the warp threads is carried out by means of control threads, each of which is equipped, at one of its ends, with a loop which is crossed by a warp thread, and the other end of which is fixed to a motion control hook. Currently, the machines have a fixed size and a number of control hooks limited to 1,344. This number is insufficient in the case of weaving fine threads, so that several warp threads intended to be lifted at the same time must be connected to the same control hook.

L'ensemble des fils de commande ou harnais, peut former un harnais droit 2, comme montré à la figure 1 du dessin, dans le cas d'une mécanique à dessin chute sur chaîne, ou former une hélice 3, comme montré à la figure 2, dans le cas d'une chute latérale à gauche ou à droite. Les fils de liaison 4 entre les crochets de commande, portant la référence 5 aux figures 2 et 3, et les fils de chaîne traversent une planche d'empoutage 6, c'est-à-dire une planche comportant un trou 7 pour le passage de chaque fil de commande 4, et assurant une mise en ordre des fils et leur mise en ligne avec le fil de chaîne correspondant.The assembly of control wires or harnesses, can form a straight harness 2, as shown in FIG. 1 of the drawing, in the case of a mechanical drawing falling on a chain, or form a propeller 3, as shown in FIG. 2, in the case of a lateral fall to the left or to the right. The connecting wires 4 between the control hooks, bearing the reference 5 in FIGS. 2 and 3, and the warp wires pass through a drip board 6, that is to say a board comprising a hole 7 for the passage of each control wire 4, and ensuring ordering of the wires and putting them in line with the corresponding warp wire.

Chaque fil de chaîne est en outre soumis à l'action d'éléments de rappel à ressort ou élastique, fixés sur une poutre d'accrochage, et disposés, par rapport à la nappe de fils de chaîne, du côté opposé à celui duquel se trouvent les fils de commande, ces éléments de rappel assurant le retour de chaque fil de chaîne dans sa position initiale lorsque cesse l'action exercée sur lui par le fil de commande.Each warp thread is further subjected to the action of spring or elastic return elements, fixed on a hanging beam, and arranged, with respect to the ply of warp threads, on the side opposite that of which find the control wires, these return elements ensuring the return of each chain wire to its initial position when the action exerted on it by the control wire ceases.

La planche d'empoutage détermine la densité du tissu.The grouting board determines the density of the fabric.

Si l'on apporte une modification sur la planche d'empoutage pour modifier la densité du tissu, en conservant le même harnais, on constate que, comme montré à la figure 3, on modifie la rectitude de la nappe de fils de chaîne, ce qui rend le tissage impossible. La figure 3 représente un bloc de commande 8 fixe, ainsi que deux possibilités de disposition des fils de commande résultant de deux utilisations de la planche d'empoutage. Comme cela ressort du dessin, dans la première configuration schématisée par une ligne en trait mixte, les fils de chaîne sont dans un même plan. Au contraire, dans la seconde configuration représentée en pointillés, les fils de chaîne sont disposés selon une surface courbe, empêchant l'introduction de la trame.If we make a modification on the grouting board to modify the density of the fabric, keeping the same harness, we see that, as shown in Figure 3, we modify the straightness of the warp threads, which makes weaving impossible. FIG. 3 represents a fixed control unit 8, as well as two possibilities of arrangement of the control wires resulting from two uses of the grading board. As can be seen from the drawing, in the first configuration shown diagrammatically by a dashed line, the warp threads are in the same plane. On the contrary, in the second configuration shown in dotted lines, the warp threads are arranged on a curved surface, preventing the introduction of the weft.

Seul un type de montage spécial avec deux ou trois planches d'empoutage superposées permet des écarts de densité de 15 à 20 % au maximum.Only a special type of assembly with two or three stacking planks allows density differences of 15 to 20% maximum.

Si l'on veut changer la densité du tissu, il convient donc de refaire entièrement le montage, ce qui représente un coût de plusieurs francs par fil de commande installé, ainsi qu'une immobilisation du métier de plusieurs semains, se traduisant par une importante perte de production.If you want to change the density of the fabric, it is therefore necessary to redo the assembly entirely, which represents a cost of several francs per installed control wire, as well as an immobilization of the trade for several weeks, resulting in a significant loss of production.

La présente invention vise à remédier à ces inconvénients en fournissant un dispositif permettant de faire varier simplement et rapidement la densité du tissu, sans démontage du harnais.The present invention aims to remedy these drawbacks by providing a device making it possible to vary the density of the fabric simply and quickly, without dismantling the harness.

A cet effet, le dispositif qu'elle concerne comprend en combinaison un système individuel de commande de chaque fil de chaîne, de position réglable sur un support, et une série de planchettes d'empoutage, disposées sensiblement parallèlement aux fils de chaîne, comportant chacune une pluralité de trou s pour le passage d'un nombre correspondant de fils de commande des fils de chaîne, ces planchettes étant montées sur leur support avec possibilité de réglage de leur nombre et de leur écartement.To this end, the device which it concerns comprises in combination an individual control system for each warp thread, of position adjustable on a support, and a series of drip boards, arranged substantially parallel to the warp threads, each comprising a plurality of holes for the passage of a corresponding number of threads for controlling the warp threads, these boards being mounted on their support with the possibility of adjusting their number and their spacing.

Il résulte de cette structure qu'il est possible de modifier la densité d'un tissu en utilisant le même harnais de commande, en modifiant conjointement la position des crochets de commande et/ou le nombre et la disposition des planchettes d'empoutage, afin de maintenir la nappe de fils de chaîne dans un même plan.It follows from this structure that it is possible to modify the density of a fabric using the same control harness, by jointly modifying the position of the control hooks and / or the number and the arrangement of the drip boards, in order to to maintain the layer of warp threads in the same plane.

Selon une caractéristique avantageuse de l'invention, les crochets de commande sont regroupés sur un certain nombre de modules, chaque module étant monté de façon réglable avec blocage dans la position désirée, sur un support solidaire du bâti de l'appareil, et les planchettes d'empoutage comportent chacune un certain nombre de trous pour le passage des fils de commande, ce nombre étant un sous-multiple du nombre de crochets d'un module.According to an advantageous characteristic of the invention, the control hooks are grouped on a certain number of modules, each module being mounted in an adjustable manner with locking in the desired position, on a support integral with the frame of the apparatus, and the boards each has a number of holes for the passage of the control wires, this number being a submultiple of the number of hooks of a module.

Il en résulte que tous les fils de commande associés à un module sont guidés par un nombre entier de planchettes d'empoutage.As a result, all of the control wires associated with a module are guided by an integer number of drip boards.

Avantageusement, le nombre de crochets d'un module est de 576, tandis que le nombre de trous ménagés dans un planchette d'empoutage est de 96.Advantageously, the number of hooks of a module is 576, while the number of holes made in a drip tray is 96.

Selon une autre caractéristique de l'invention, la largeur de chaque planchette d'empoutage est de 9,6 mm.According to another characteristic of the invention, the width of each drip board is 9.6 mm.

Ceci permet, dans la mesure où douze planchettes sont disposées de façon jointives, d'assurer le guidage de 1 152 fils de commande associés à deux modules, ce qui permet d'obtenir une densité du tissu de 100 fils par centimètre.This allows, insofar as twelve boards are arranged contiguously, to ensure the guiding of 1,152 control wires associated with two modules, which makes it possible to obtain a fabric density of 100 threads per centimeter.

Dans une telle configuration, les modules doivent être groupés par paires, et subir un montage de type tête-bêche.In such a configuration, the modules must be grouped in pairs, and undergo head-to-tail mounting.

Pour diminuer la densité des fils, il suffit d'écarter les planchettes d'empoutage et de déplacer les modules sur leurs supports pour diminuer les angles qui pourraient naître entre les planchettes et les crochets des modules fil à fil. Ceci permet de conserver une rectitude acceptable de la nappe des fils de chaîne. Cette disposition permet de travailler avec une densité des fils comprise entre 100 et 46,8 fils par centimètre.To reduce the density of the wires, it is enough to separate the drip boards and move the modules on their supports to reduce the angles that could arise between the boards and the hooks of the wire-to-wire modules. This keeps an acceptable straightness of the web of warp threads. This arrangement makes it possible to work with a density of the wires between 100 and 46.8 wires per centimeter.

Pour réaliser des tissus de densité inférieure à 46,8 fils par centimètre, il suffit de monter les modules en ligne, c'est-à-dire parallèlement les uns aux autres sur un même support avec réglage de l'écartement entre les planchettes.To make fabrics with a density of less than 46.8 threads per centimeter, it suffices to mount the modules in line, that is to say parallel to each other on the same support with adjustment of the spacing between the boards.

Selon une autre caractéristique de l'invention, les moyens de rappel des fils de chaîne comprennent des planchettes situées en-dessous de la nappe de fils de chaîne et occupant la même disposition que les planchettes d'empoutage, ces planchettes étant à cet effet montées réglables sur leur support, ce support étant lui-même monté déplaçable verticalement à l'aide d'un vérin entre une position correspondant à la position de travail dans laquelle les fils de commande sont tendus, et une position relâchée. Cette position relâchée est celle qui est adoptée préalablement à une modification de la densité du tissu.According to another characteristic of the invention, the means for returning the warp yarns comprise boards situated below the ply of warp yarns and occupying the same arrangement as the drip boards, these boards being for this purpose mounted adjustable on their support, this support being itself mounted vertically movable by means of a jack between a position corresponding to the working position in which the control wires are stretched, and a relaxed position. This relaxed position is that which is adopted prior to a modification of the density of the tissue.

Le réglage des planchettes d'empoutage ainsi que des planchettes de rappel peut être obtenu de différentes façons et notamment par engagement des extrémités des planchettes dans les encoches ménagées à espacements déterminés dans deux réglettes, par montage entre les planchettes d'empoutage d'enteroises de largeur correspondant à la largeur souhaitée entre deux planchettes, ou encore par montage de planchettes sur leur support avec mise en oeuvre de moyens d'indexation et de moyens de blocage à vis ou à excentrique par exemple.The adjustment of the drip boards as well as of the return boards can be obtained in different ways and in particular by engagement of the ends of the boards in the notches formed at determined spacings in two strips, by mounting between the dowel boards of spacers of width corresponding to the width desired between two boards, or by mounting boards on their support with the use of indexing means and locking means with screw or eccentric for example.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit en référence au dessin schématique annexé représentant, à titre d'examples non limitatifs, deux formes d'exécution de ce dispositif :

  • Figure 4 est une vue de dessus d'une planchette d'empoutage ;
  • Figure 5 est une vue d'un dispositif de rappel d'un fil de chaîne ;
  • Figures 6 et 7 sont deux vues en perspective de deux dispositifs de positionnement et de maintien de planchettes d'empoutage ou de rappel ;
  • Figures 8 et 9 sont deux vues de côté de deux dispositifs selon l'invention.
In any case, the invention will be clearly understood with the aid of the description which follows with reference to the appended diagrammatic drawing representing, by way of nonlimiting examples, two embodiments of this device:
  • Figure 4 is a top view of a drip board;
  • Figure 5 is a view of a return device of a warp thread;
  • Figures 6 and 7 are two perspective views of two devices for positioning and holding drip or recall boards;
  • Figures 8 and 9 are two side views of two devices according to the invention.

Dans le dispositif selon l'invention, chaque fil de commande 4 est associé à un crochet de commande indépendant. Ces crochets sont regroupés au niveau de modules 9, chaque module comportant 576 crochets distribués par 24 plaques de 24 crochets.In the device according to the invention, each control wire 4 is associated with an independent control hook. These hooks are grouped at the level of modules 9, each module comprising 576 hooks distributed by 24 plates of 24 hooks.

Ces modules, et leur montage sur leurs supports respectifs, seront décrits plus loin.These modules, and their mounting on their respective supports, will be described later.

Chaque fil traverse un trou 10 ménagé dans une planchette d'empoutage 12. Chaque planchette d'empoutage 12 d'une largeur de 9,6 mm comporte 93 trous 10 disposés selon quatre lignes parallèles 13, chacune d'une longueur de l'ordre de 120 mm. Un certain nombre de planchettes, fonction de la largeur du tissu ainsi de la densité des fils de chaîne, doivent être disposées parallèlement les unes aux autres, dans le sens des fils de chaîne. Dans la forme d'exécution représentée à la figure 6, les planchettes 12 sont disposées sur une règle d'empoutage 13 comportant deux butées 14 d'extrémités. Dans les parties latérales de chaque règle 13 désignée par les références A et B, les planchettes sont jointives, ce qui correspond à une densité maximale des fils. Au contraire, dans la partie centrale C, les planchettes d'empoutage 12 sont maintenues écartées les unes des autres par des planchettes intercalaires 15, ce qui permet d'obtenir une densité plus faible de fils de chaîne.Each wire passes through a hole 10 formed in a drip board 12. Each drip board 12 with a width of 9.6 mm has 93 holes 10 arranged in four parallel lines 13, each of a length of the order 120 mm. A number of boards, depending on the width of the fabric and the density of the warp threads, must be arranged parallel to each other, in the direction of the warp threads. In the embodiment shown in Figure 6, the boards 12 are arranged on a raking rule 13 having two stops 14 at the ends. In the lateral parts of each rule 13 designated by the references A and B, the boards are contiguous, which corresponds to a maximum density of the wires. On the contrary, in the central part C, the drip boards 12 are kept apart from each other by intermediate boards 15, which makes it possible to obtain a lower density of warp yarns.

Dans la forme d'exécution représentée à la figure 7, la règle d'empoutage 13a comporte une échelle graduée 16 et est équipée d'une plaque de verrouillage 17 dans laquelle est ménagée une luminère longitudinale 18. Chaque planchette d'empoutage est munie d'une tige filetée 19 permettant son verrouillage sur la plaque 17 à l'aide d'un écrou 20 après repérage de la position de chaque planchette grâce à un index 22 situé en regard de l'échelle 16.In the embodiment shown in Figure 7, the drip rule 13a has a graduated scale 16 and is equipped with a locking plate 17 in which is formed a longitudinal light 18. Each drip board is provided with '' a threaded rod 19 allowing its locking on the plate 17 using a nut 20 after locating the position of each board using an index 22 located opposite the scale 16.

Les dispositifs décrits ci-dessus dans le cas des planchettes d'empoutage s'appliquent tout aussi bien aux planchettes de rappel 23 qui sont disposées sous la nappe de fils de chaîne, et qui doivent occuper chacune une position correspondant à celle d'une planchette d'empoutage. Les planchettes d'empoutage 23 comportent des trous 24 pour le passage d'éléments élastiques 25 dont une extrméité est fixé à la boucle 26 traversée par le fil de chaîne et dont le mouvement est donné par un fil de commande 4. Il est à noter que les différentes planchettes de rappel sont montées sur un même support 27, et que ce support est déplaçable verticalement à l'aide d'un vérin 28 entre une position de travail dans laquelle est réalisé le rappel des fils de chaîne et une position de réglage dans lequelle les moyens de rappel sont détendus.The devices described above in the case of tipping boards apply just as well to the return boards 23 which are arranged under the ply of warp threads, and which must each occupy a position corresponding to that of a board drip. The drip boards 23 have holes 24 for the passage of elastic elements 25, one end of which is fixed to the loop 26 crossed by the warp thread and the movement of which is given by a control wire 4. It should be noted that the various return boards are mounted on the same support 27, and that this support is vertically movable by means of a jack 28 between a working position in which the return of the warp threads is carried out and an adjustment position in which the return means are relaxed.

La figure 8 représente un dispositif destiné à la réalisation d'un tissu dont les fils de chaîne ont une faible ou moyenne densité, c'est-à-dire inférieure a 46,8 fils au centimètre. Dans ce cas, un certain nombre de modules 9, fonction de la largeur du tissu à réaliser, sont disposés en ligne, c'est-à-dire parallèlement les uns aux autres sur un même support.FIG. 8 represents a device intended for the production of a fabric whose warp threads have a low or medium density, that is to say less than 46.8 threads per centimeter. In this case, a certain number of modules 9, depending on the width of the fabric to be produced, are arranged in line, that is to say parallel to each other on the same support.

Il est à noter que l'écartement entre ces modules peut être réglé, après desserrage des moyens de fixation 29 de chaque module et coulissement d'un bras 30 solidaire de ce module sur un arbre 32 solidaire du support fixe 33. Les bras 30 des différents modules peuvent être bloqués sur l'arbre 32 par des moyens à excentrique 34, et la position de chaque module peut être déterminée avec précision grâce à une échelle graduée 35 que comporte le support 33. Pour obtenir des tissus dans lesquels la densitué du fil de chaîne est plus importante, supérieure à 46,8 fils par centimètre et jusqu'à 100 fils par centimètre, les modules sont groupés par paires, les deux modules d'une même paire étant disposés tête-bêche, comme cela ressort de la figure 9. Dans ce cas, il convient de prévoir deux arbres de co mmande, c'est-à-dire un arbre pour chaque série de module.It should be noted that the spacing between these modules can be adjusted, after loosening the fixing means 29 of each module and sliding of an arm 30 secured to this module on a shaft 32 secured to the fixed support 33. The arms 30 of the different modules can be blocked on the shaft 32 by eccentric means 34, and the position of each module can be determined with precision by means of a graduated scale 35 which comprises the support 33. To obtain fabrics in which the density of the thread chain is greater, greater than 46.8 threads per centimeter and up to 100 threads per centimeter, the modules are grouped in pairs, the two modules of the same pair being arranged head to tail, as shown in the figure 9. In this case, two control shafts should be provided, that is to say one shaft for each series of modules.

Pour modifier la densité des fils de chaîne, il convient tout d'abord, par actionnement du vérin 28, de placer les moyens de rappel en position détendue, de desserrer les moyens de fixation de chaque module sur l'arbre de commande pour l'amener dans la position souhaitée, de positionner les planchettes d'empoutage et de rappel, de changer le peigne puisque cet élément donne la largeur du tissu, et enfin d'assurer la mise en tension des moyens de rappel de la nappe de fils de chaîne. Il est à noter que cette opération est effectuée simplement et rapidement, sans modification harnais, ce qui constitue un facteur d'économie et de rapidité.To modify the density of the warp threads, it is first of all necessary, by actuating the jack 28, to place the return means in the relaxed position, to loosen the means of fixing of each module on the control shaft for the bring in the desired position, position the grouting and recall boards, change the comb since this element gives the width of the fabric, and finally ensure the setting tension of the return means of the ply of warp threads. It should be noted that this operation is carried out simply and quickly, without modification of the harness, which constitutes a factor of economy and speed.

Comme il ressort de ce qui précède, invention approte une grande amélioration à la technique existante en fournissant un dispositif de conception simple, qui a été décrit ci-dessus dans le cas d'un réglage manuel mais qui pourrait être très facilement automatisé. Comme il va de soi, l'invention ne se limite pas aux seules formes d'exécution de ce dispositif décrites ci-dessus à titre d'exemples ; elle en embrasse au contraire toutes les variantes de réalisation. C'est ainsi par exemple que le nombre de crochets par module pourrait être différent, de même que les dimensions et le nombre de trous des planchettes d'empoutage et de rappel, sans que l'on sorte pour autant du cadre de l'invention. As is apparent from the foregoing, the invention approves a great improvement to the existing technique by providing a device of simple design, which has been described above in the case of manual adjustment but which could be very easily automated. It goes without saying that the invention is not limited to the sole embodiments of this device described above by way of examples; on the contrary, it embraces all of its variant embodiments. Thus, for example, the number of hooks per module could be different, as well as the dimensions and the number of holes in the drip and recall boards, without going beyond the ambit of the invention. .

Claims (8)

1.- Dispositif de variation de la densité des fils de chaîne dans un métier à tisser, caractérisé en ce qu'il comprend en combinaison un système individuel de commande de chaque fil de chaîne, de position réglable sur un support, et une série de planchettes d'empoutage (12) disposées sensiblement parallèlement les unes aux autres et orientées sensiblement parallèlement aux fils de chaîne, comportant chacune une pluralité de trous pour le passage d'un nombre correspondant de fils de commande (4) des fils de chaîne, ces planchettes étant montées sur leur support (13) avec possibilité de réglage de leur nombre et de leur écartement.1.- Device for varying the density of warp threads in a weaving loom, characterized in that it comprises in combination an individual control system for each warp thread, of position adjustable on a support, and a series of drip boards (12) arranged substantially parallel to each other and oriented substantially parallel to the warp threads, each comprising a plurality of holes for the passage of a corresponding number of control threads (4) of the warp threads, these boards being mounted on their support (13) with the possibility of adjusting their number and their spacing. 2.- Dispositif selon la revendication 1, caracérisé en ce que les crochets de commande sont regroupés sur un certain nombre de modules (9), chaque module (9) étant monté de façon réglable avec blocage dans la position désirée, sur un support (33) solidaire du bâti de l'appareil, et les planchettes d'empoutage (12) comportent chacune un certain nombre de trous (10) pour le passage des fils de commande (4), ce nombre étant un sous-multiple du nombre de crochets d'un module.2.- Device according to claim 1, characterized in that the control hooks are grouped on a number of modules (9), each module (9) being mounted in an adjustable manner with locking in the desired position, on a support ( 33) integral with the frame of the apparatus, and the drip boards (12) each have a certain number of holes (10) for the passage of the control wires (4), this number being a sub-multiple of the number of hooks of a module. 3.- Dispositif selon la revendication 2, caractérisé en ce que le nombre de crochets d'un module (9) est de 576, tandis que le nombre de trous (10) ménagés dans une planchette d'empoutage (12) est de 96.3.- Device according to claim 2, characterized in that the number of hooks of a module (9) is 576, while the number of holes (10) formed in a drip board (12) is 96 . 4.- Dispositif selon la revendication 3, caractérisé en ce que la largeur de chaque planchette d'empoutage (12) est de 9,6 mm.4.- Device according to claim 3, characterized in that the width of each drip board (12) is 9.6 mm. 5.- Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les moyens de rappel des fils de chaîne comprennent des planchettes (23) situées en-dessous de la nappe de fils de chaîne et occupant le même disposition que les planchettes d'empoutage (12), ces planchettes (23) étant à cet effect montées réglables sur leur support (27), ce support étant lui-même monté déplaçable verticalement à l'aide d'un vérin (28) entre une position correspondant à la position de travail dans laquelle les fils de commande sont tendus, et une position relâchée.5.- Device according to any one of claims 1 to 4, characterized in that the return means of the warp son comprise boards (23) located below the ply of warp son and occupying the same arrangement as the drip boards (12), these boards (23) being for this purpose mounted adjustable on their support (27), this support itself being mounted movable vertically by means of a jack (28) between a position corresponding to the working position in which the control wires are stretched, and a relaxed position. 6.- Dispositif selon l'ensemble des revendications 1 à 5 caractérisé en ce que les moyens de réglage des planchettes d'empoutage (12) et de rappel (23) sur leurs supports respectifs sont constitués par des réglettes supports comportant des encoches ménagées à espacement prédéterminé les unes des autres, pour l'engagement des extrémités des planchettes (12,23).6.- Device according to all of claims 1 to 5 characterized in that the means for adjusting the grouting plates (12) and return (23) on their respective supports are constituted by support strips comprising notches formed in predetermined spacing from each other, for engagement of the ends of the boards (12,23). 7.- Dispositif selon l'ensemble des revendications 1 à 5, caractérisé en ce que les moyens de réglage de s planchettes d'empoutage (12) et de rappel (23) sur leurs supports respectifs comprennent des planchettes intercalaires (15) de largeur prédéterminé disposées entre les planchettes, en fonction de la densité du tissu à réaliser.7.- Device according to all of claims 1 to 5, characterized in that the means for adjusting the siphoning (12) and return (23) boards on their respective supports comprise intermediate boards (15) of predetermined width arranged between the boards, depending on the density of the fabric to be achieve. 8.- Dispositif selon l'ensemble des revendications 1 à 5 caractérisé en ce que les moyens de réglage des planchettes d'empoutage (12) et de rappel (23) comprennent des moyens d'indexation (16,22) de la position de chaque planchette sur son support (13a), et des moyens de blocage à vis (18,20) de chaque planchette sur son support (13a).8.- Device according to all of claims 1 to 5 characterized in that the means for adjusting the grouting boards (12) and return (23) comprise means for indexing (16,22) of the position of each board on its support (13a), and screw locking means (18,20) of each board on its support (13a).
EP87420230A 1986-09-05 1987-09-03 Device to change the warp density in looms Expired - Lifetime EP0263764B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8612884 1986-09-05
FR8612884A FR2603612B1 (en) 1986-09-05 1986-09-05 DEVICE FOR VARIING THE DENSITY OF CHAIN THREADS IN A WEAVING MATERIAL

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EP0263764A1 true EP0263764A1 (en) 1988-04-13
EP0263764B1 EP0263764B1 (en) 1991-07-24

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EP87420230A Expired - Lifetime EP0263764B1 (en) 1986-09-05 1987-09-03 Device to change the warp density in looms

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US (1) US4777986A (en)
EP (1) EP0263764B1 (en)
JP (1) JPS63120130A (en)
DE (1) DE3771636D1 (en)
ES (1) ES2023933B3 (en)
FR (1) FR2603612B1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
DE19731447A1 (en) * 1997-07-22 1999-01-28 Textilma Ag Weaving harness and jacquard weaving machine with weaving harness
EP1096049A1 (en) * 1999-10-28 2001-05-02 Staubli Lyon Device and assembly for fixing Jacquard-harness springs and loom with such an assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PE20030320A1 (en) * 2001-07-17 2003-04-03 Gruenenthal Chemie SUBSTITUTE DERIVATIVES OF 4-AMINOCICLOHEXANOL
BE1015313A3 (en) * 2003-01-16 2005-01-11 Michel Van De Wiele N V Nv HARNESS device for a weaving machine.
CN106801284B (en) * 2017-03-22 2018-01-19 淄博银仕来纺织有限公司 A kind of dress of subregion keevil using jacquard weaving makes method

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FR994962A (en) * 1949-06-29 1951-11-26 Universal shaped body allowing weaving of fabrics of varying warp densities and widths with immediate re-fitting
BE683714A (en) * 1965-07-06 1966-12-16
GB1209589A (en) * 1968-03-01 1970-10-21 Andre Gryspeerdt Improvements in or relating to jacquard looms
FR2135883A6 (en) * 1971-04-29 1972-12-22 Gryspeerdt Andre Jacquard mechanism - using upper and lower frames carrying punched plates

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US1150396A (en) * 1915-08-17 Eugen Seckler Comber-board.
DE201132C (en) *
DE140500C (en) *
DE836474C (en) * 1939-12-06 1952-04-15 Franz Bittner Device for adjusting the gauze on jacquard machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR994962A (en) * 1949-06-29 1951-11-26 Universal shaped body allowing weaving of fabrics of varying warp densities and widths with immediate re-fitting
BE683714A (en) * 1965-07-06 1966-12-16
GB1209589A (en) * 1968-03-01 1970-10-21 Andre Gryspeerdt Improvements in or relating to jacquard looms
FR2135883A6 (en) * 1971-04-29 1972-12-22 Gryspeerdt Andre Jacquard mechanism - using upper and lower frames carrying punched plates

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731447A1 (en) * 1997-07-22 1999-01-28 Textilma Ag Weaving harness and jacquard weaving machine with weaving harness
EP1096049A1 (en) * 1999-10-28 2001-05-02 Staubli Lyon Device and assembly for fixing Jacquard-harness springs and loom with such an assembly
FR2800395A1 (en) * 1999-10-28 2001-05-04 Staubli Lyon JACQUARD HARNESS SPRING SOLIDARIZATION DEVICE AND ASSEMBLY AND WEAVING EQUIPMENT PROVIDED WITH SUCH AN ASSEMBLY
US6302154B1 (en) 1999-10-28 2001-10-16 Staubli Lyon Spring connection device and assembly in a jacquard harness

Also Published As

Publication number Publication date
FR2603612B1 (en) 1988-12-09
ES2023933B3 (en) 1992-02-16
FR2603612A1 (en) 1988-03-11
JPS63120130A (en) 1988-05-24
DE3771636D1 (en) 1991-08-29
US4777986A (en) 1988-10-18
EP0263764B1 (en) 1991-07-24
JPH0361777B2 (en) 1991-09-20

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