EP0860528B1 - Tensioner and shedding mechanism with such a tensioner - Google Patents

Tensioner and shedding mechanism with such a tensioner Download PDF

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Publication number
EP0860528B1
EP0860528B1 EP19980420023 EP98420023A EP0860528B1 EP 0860528 B1 EP0860528 B1 EP 0860528B1 EP 19980420023 EP19980420023 EP 19980420023 EP 98420023 A EP98420023 A EP 98420023A EP 0860528 B1 EP0860528 B1 EP 0860528B1
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EP
European Patent Office
Prior art keywords
drawing device
piston
heald
cylinders
cylinder
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EP19980420023
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German (de)
French (fr)
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EP0860528A1 (en
Inventor
Joseph Palau
Dario Bassi
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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
    • D03C3/22—Fluid-operated jacquards
    • 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
    • D03C3/44—Lingoes

Definitions

  • the invention relates to a device for drawing a heald weaving loom and weaving machine mechanics weave of Jacquard type comprising such a device.
  • the first weaving looms used weights hanging from the healds of the harness.
  • the harnesses were then fitted with springs connecting the lower part of the beams of the harness to the frame of the machine.
  • a spring has the disadvantage that the force which it exerts on the arm is proportional to the displacement of the latter.
  • F F 0 + kx, in which F 0 is the value of the force obtained at the low position, k is the stiffness constant of the spring and x the displacement from the rest position.
  • the invention relates to a device for drawing of a heddle from a Jacquard type loom comprising a piston kinematically linked to said beam, said piston being movable in a cylinder under the effect of a pressure higher than atmospheric pressure prevailing in a chamber and a tensile force exerted by said beam, characterized in that the connection between said piston and said smooth comprises a rod integral with one part of said piston and on the other hand a stirrup arranged around said cylinder, said stirrup being connected to said beam.
  • the construction of the invention makes it possible to connect the boom and the piston without crossing the bulkhead of the chamber in which prevails the pressure higher than atmospheric pressure. This avoids the drilling of holes which would result in large leaks of compressed air.
  • the stirrup of the invention allows to reach the piston rod, which is necessarily arranged under it so that the overpressure prevailing in the pneumatic device chamber induces movement of the piston down, to the rail which is located above the pulling device.
  • the cylinder carries, in its lower end part, means for guiding the rod in translation. These means of guides allow smooth translation of the rod and piston inside the cylinder.
  • the device comprises a plurality of cylinders arranged in rows and supplied with compressed air from a source common, by a common conduit to the cylinders of each row.
  • This construction allows simple feeding of the different cylinders of the device while leaving the passage for the stirrups he understands.
  • the stirrups associated with the cylinders of a row are arranged substantially perpendicular to the main axis of this row. This arrangement allows movements calipers without interference with the rows of cylinders.
  • the piston is provided with sealing rings. These segments are function of limiting the leakage of compressed air between the piston and the cylinder, it being understood that these leaks are the only ones which can intervene insofar as the cylinder chamber in which the overpressure reigns is in communication with the outside atmosphere only through the piston.
  • the stirrup is made up of rigid or semi-rigid blades.
  • the stirrup is formed of wires.
  • the invention also relates to a mechanical armor of Jacquard type loom incorporating a draw as previously described.
  • a mechanical of armor works more economically than those that are known from the prior art insofar as the forces that she must exercise on the harness are lower than those that an armor mechanics associated with a device of spring draw and where the compressed air consumption is very lower than that of a device conforming to the teaching BE-A-856 625.
  • the heald pulling device 1 of a Jacquard harness includes, for each boom, a cylinder 2 inside which is movable a piston 3 provided with sealing segments 4.
  • a overpressure chamber 5 is provided above the piston 3.
  • This room is supplied with compressed air through a duct 6 formed by a cover 7 arranged above and around a base 8 into which are inserted several cylinders 2 forming a row aligned along an axis XX '.
  • Each row of cylinders is supplied by a common conduit 9, which can also serve as support for bases 8, from a common source, such as the pressure network of a workshop.
  • a rod 10 is secured on the one hand to the underside of the piston and on the other hand to a substantially horizontal plate or blade 11.
  • the plate 11 is, for its part, integral with a stirrup 12 formed by two blades 12 a substantially vertical and extending upwards from the plate 11. In their upper part, the blades 12 a are connected by a cross member 12 b belonging to the stirrup 12 and connected in its central part to the beam 1.
  • the force F is transmitted by the rigid rod 10 to the plate 11 and via the blades 12 a to the cross member 12 b which itself transmits it to the arm 1.
  • the tensile force F 'coming, at certain times, from the Jacquard mechanism placed above the harness is transmitted by the arm 1 to the cross member 12 b and, from there, to the blades 12 a and to the plate 11, which tends to cause the piston 3 to go back up inside the cylinder 2 due to the rigid connection made by the rod 10 against the permanent force pressure F.
  • the cylinder 2 comprises in its lower part a internal collar 16 whose internal diameter is substantially smaller than the diameter of cylinder 2, so that this collar constitutes a means of guiding the rod 10 in translation and possibly a limit stop for piston 3.
  • This flange guarantees that the rod 10 remains substantially vertical, even when an effort transverse exerted on the stringer 1 tends to move laterally the stirrup 12.
  • a comber board 17 is disposed above the device of the invention and has openings 17 substantially aligned with the axis YY 'of the cylinder 2. This alignment also ensures that a transverse force exerted on the rail 1 in above the grading board will not be transmitted directly to the device of the invention.
  • the movements of the rails 1 are determined in amplitude and speed by Jacquard mechanics, the pulling device opposing a resistance substantially constant at the rise of the rails.
  • stirrups 12 associated with cylinders 2 of a row are arranged substantially perpendicular to its main axis XX ', of so that their movements do not interfere with base 8.
  • the bracket has been shown with blades 12 has rigid or semi-rigid.
  • the plate 11 and the cross member 12 b are permanently subjected to forces tending to separate them from one another. It is therefore not necessary that the elements connecting them are rigid.
  • the stirrup can be formed of wires, it being understood that the cross-member 12 b can even be eliminated, the wires of the stirrup joining at their point of attachment with the rail 1. In this case, the wires are held spread apart by an appropriate device or rub against the cover 7.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)

Description

L'invention a trait à un dispositif de tirage d'une lisse de métier à tisser et à une mécanique d'armure de métier à tisser de type Jacquard comprenant un tel dispositif.The invention relates to a device for drawing a heald weaving loom and weaving machine mechanics weave of Jacquard type comprising such a device.

Dans les métiers à tisser de type Jacquard, une mécanique d'armure exerce sélectivement sur les lisses d'un harnais un effort vertical dirigé vers le haut, ce qui a pour effet de soulever certains fils de chaíne lors du passage de la duite. Chaque lisse doit également être soumise à une charge verticale dirigée vers le bas afin que le fil de chaíne correspondant soit automatiquement déplacé vers le bas lorsque la mécanique d'armure n'exerce pas d'effort sur la lisse.In Jacquard looms, a mechanical of armor selectively exerts on the beams of a harness a vertical force directed upwards, which has the effect of lift some chain son when passing the pick. Each boom must also be subjected to a vertical load directed downwards so that the corresponding chain wire be automatically moved down when the mechanical of armor does not exert any effort on the stringer.

Pour exercer cette charge négative, les premiers métiers à tisser utilisaient des poids pendus aux lisses du harnais. Pour des raisons de rapidité, on a ensuite équipé les harnais de ressorts reliant la partie inférieure des lisses du harnais au bâti de la machine. Un ressort présente l'inconvénient que la force qu'il exerce sur la lisse est proportionnelle au déplacement de celle-ci. Ainsi, lorsque la force devant être obtenue en position basse de la lisse est égale à environ 20 grammes, cette force est nécessairement supérieure lorsque le fil de chaíne est soulevé par la lisse. Elle est en effet de la forme F = F0 + kx, dans laquelle F0 est la valeur de la force obtenue à la position basse, k est la constante de raideur du ressort et x le déplacement à partir de la position de repos. Il arrive donc que la lisse soit soumise à une force dépassant largement 20 grammes, de sorte que le harnais est sollicité mécaniquement d'une façon qui n'est pas nécessaire, ce qui résulte dans son usure prématurée. En outre, la mécanique d'armure doit vaincre des efforts résistants relativement importants, ce qui influe sur son dimensionnement et donc sur son prix de revient et son coût d'exploitation.To exert this negative charge, the first weaving looms used weights hanging from the healds of the harness. For reasons of speed, the harnesses were then fitted with springs connecting the lower part of the beams of the harness to the frame of the machine. A spring has the disadvantage that the force which it exerts on the arm is proportional to the displacement of the latter. Thus, when the force to be obtained in the low position of the heald is equal to about 20 grams, this force is necessarily greater when the chain wire is lifted by the heald. It is in fact of the form F = F 0 + kx, in which F 0 is the value of the force obtained at the low position, k is the stiffness constant of the spring and x the displacement from the rest position. It therefore happens that the boom is subjected to a force far exceeding 20 grams, so that the harness is mechanically stressed in a manner which is not necessary, which results in its premature wear. In addition, the armor mechanics must overcome relatively high resistance forces, which influences its design and therefore its cost price and its operating cost.

Par ailleurs, il est connu du brevet BE-A-856 625 de réaliser un dispositif de tirage pneumatique sur un métier à tisser du type Jacquard. Ce brevet enseigne d'exercer sur les lisses une force de rappel verticale par dépression ou par pression. Il s'avère en pratique qu'un système utilisant la dépression n'est pas utilisable industriellement, car il a tendance à aspirer la bourre présente au voisinage d'un métier à tisser et donc à s'encrasser. De plus, la force qui peut être obtenue par dépression est limitée dans la mesure où la dépression relative obtenue avec les systèmes industriels est de l'ordre de 0,5 bars, ce qui est relativement onéreux, alors que l'air comprimé d'un réseau pneumatique a généralement une pression relative de l'ordre de 6 bars.Furthermore, it is known from patent BE-A-856,625 of make a pneumatic pulling device on a loom weave of the Jacquard type. This patent teaches to exercise on smooth a vertical restoring force by depression or by pressure. It turns out in practice that a system using the depression cannot be used industrially because it has tendency to suck the fluff present in the vicinity of a loom to weave and therefore to clog. In addition, the force which can be obtained by depression is limited insofar as the relative depression obtained with industrial systems is about 0.5 bars, which is relatively expensive, so that the compressed air of a pneumatic network generally has a relative pressure of the order of 6 bars.

C'est pourquoi il est préférable d'utiliser un système mettant en oeuvre une chambre à une pression supérieure à la pression atmosphérique. Le système connu de BE-A-856 625 prévoit que les lisses sont reliées à des pistons et traversent des orifices supérieurs de la chambre de pression. Or, au passage de la lisse qui ne peut pas frotter contre l'orifice qu'elle traverse sans risquer d'être usée en très peu de temps, il existe des fuites très importantes qui, d'une part induisent une surconsommation d'air comprimé, et d'autre part peuvent perturber le tissage qui a lieu au-dessus de cette chambre de pression.This is why it is better to use a system using a chamber at a pressure higher than the atmospheric pressure. The known system of BE-A-856 625 foresees that the beams are connected to pistons and pass through upper ports of the pressure chamber. However, at passage of the arm which cannot rub against the orifice that it crosses without risking to be worn in a very short time, there are very large leaks which, on the one hand induce overconsumption of compressed air, and on the other hand can disrupt the weaving that takes place above this chamber of pressure.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention, en proposant un dispositif pneumatique de tirage d'une lisse de métier à tisser à l'aide d'une chambre de surpression présentant des fuites minimales.It is to these disadvantages that we hear more particularly remedy the invention, by proposing a pneumatic device for drawing of a loom of a loom using a overpressure with minimal leaks.

Dans cet esprit, l'invention concerne un dispositif de tirage d'une lisse d'un métier à tisser de type Jacquard comprenant un piston cinématiquement lié à ladite lisse, ledit piston étant mobile dans un cylindre sous l'effet d'une pression supérieure à la pression atmosphérique régnant dans une chambre et d'un effort de traction exercé par ladite lisse, caractérisé en ce que la liaison entre ledit piston et ladite lisse comprend une tige solidaire d'une part dudit piston et d'autre part d'un étrier disposé autour dudit cylindre, ledit étrier étant relié à ladite lisse.In this spirit, the invention relates to a device for drawing of a heddle from a Jacquard type loom comprising a piston kinematically linked to said beam, said piston being movable in a cylinder under the effect of a pressure higher than atmospheric pressure prevailing in a chamber and a tensile force exerted by said beam, characterized in that the connection between said piston and said smooth comprises a rod integral with one part of said piston and on the other hand a stirrup arranged around said cylinder, said stirrup being connected to said beam.

La construction de l'invention permet de relier la lisse et le piston sans traverser la cloison de la chambre dans laquelle règne la pression supérieure à la pression atmosphérique. On évite donc le perçage d'orifices qui résulteraient dans des fuites importantes d'air comprimé. L'étrier de l'invention permet de rejoindre la tige du piston, qui est nécessairement disposée sous celui-ci pour que la surpression régnant dans la chambre du dispositif pneumatique induise un mouvement du piston vers le bas, à la lisse qui est située au-dessus du dispositif de tirage.The construction of the invention makes it possible to connect the boom and the piston without crossing the bulkhead of the chamber in which prevails the pressure higher than atmospheric pressure. This avoids the drilling of holes which would result in large leaks of compressed air. The stirrup of the invention allows to reach the piston rod, which is necessarily arranged under it so that the overpressure prevailing in the pneumatic device chamber induces movement of the piston down, to the rail which is located above the pulling device.

Selon un premier aspect avantageux de l'invention, le cylindre porte, dans sa partie d'extrémité inférieure, des moyens de guidage de la tige en translation. Ces moyens de guidage permettent une translation sans heurt de la tige et du piston à l'intérieur du cylindre.According to a first advantageous aspect of the invention, the cylinder carries, in its lower end part, means for guiding the rod in translation. These means of guides allow smooth translation of the rod and piston inside the cylinder.

Selon un autre aspect avantageux de l'invention, le dispositif comprend une pluralité de cylindres disposés en rangées et alimentés en air comprimé, à partir d'une source commune, par un conduit commun aux cylindres de chaque rangée. Cette construction permet une alimentation simple des différents cylindres du dispositif tout en ménageant le passage pour les étriers qu'il comprend.According to another advantageous aspect of the invention, the device comprises a plurality of cylinders arranged in rows and supplied with compressed air from a source common, by a common conduit to the cylinders of each row. This construction allows simple feeding of the different cylinders of the device while leaving the passage for the stirrups he understands.

Dans ce cas et selon un autre aspect avantageux de l'invention, les étriers associés aux cylindres d'une rangée sont disposés sensiblement perpendiculairement à l'axe principal de cette rangée. Cette disposition permet les mouvements des étriers sans interférence avec les rangées de cylindres.In this case and according to another advantageous aspect of the invention, the stirrups associated with the cylinders of a row are arranged substantially perpendicular to the main axis of this row. This arrangement allows movements calipers without interference with the rows of cylinders.

On peut également prévoir que les cylindres sont alignés avec les orifices de passage d'une planche d'empoutage. Cet aspect de l'invention permet de garantir que la lisse demeure sensiblement verticale au voisinage du cylindre, de sorte que l'effort qu'elle exerce sur l'étrier est également sensiblement vertical, ce qui permet de diminuer les risques de coincement.One can also provide that the cylinders are aligned with the holes for the passage of a grouting board. This aspect of the invention ensures that the rail remains substantially vertical in the vicinity of the cylinder, so that the force it exerts on the stirrup is also appreciably vertical, which reduces the risk of jamming.

Selon un autre aspect avantageux de l'invention, le piston est pourvu de segments d'étanchéité. Ces segments ont pour fonction de limiter les fuites d'air comprimé entre le piston et le cylindre, étant entendu que ces fuites sont les seules qui peuvent intervenir dans la mesure où la chambre du cylindre dans laquelle règne la surpression n'est en communication avec l'atmosphère extérieure qu'à travers le piston.According to another advantageous aspect of the invention, the piston is provided with sealing rings. These segments are function of limiting the leakage of compressed air between the piston and the cylinder, it being understood that these leaks are the only ones which can intervene insofar as the cylinder chamber in which the overpressure reigns is in communication with the outside atmosphere only through the piston.

Selon un premier mode de réalisation de l'invention, l'étrier est formé de lames rigides ou semi-rigides.According to a first embodiment of the invention, the stirrup is made up of rigid or semi-rigid blades.

Selon un second mode de réalisation de l'invention, l'étrier est formé de fils.According to a second embodiment of the invention, the stirrup is formed of wires.

L'invention concerne également une mécanique d'armure de métier à tisser du type Jacquard incorporant un dispositif de tirage tel que précédemment décrit. Une telle mécanique d'armure fonctionne de façon plus économique que celles qui sont connues de l'art antérieur dans la mesure où les efforts qu'elle doit exercer sur le harnais sont inférieurs à ceux qu'exerce une mécanique d'armure associée à un dispositif de tirage à ressorts et où la consommation d'air comprimé est très inférieure à celle d'un dispositif conforme à l'enseignement technique de BE-A-856 625.The invention also relates to a mechanical armor of Jacquard type loom incorporating a draw as previously described. Such a mechanical of armor works more economically than those that are known from the prior art insofar as the forces that she must exercise on the harness are lower than those that an armor mechanics associated with a device of spring draw and where the compressed air consumption is very lower than that of a device conforming to the teaching BE-A-856 625.

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

  • la figure 1 est une représentation partielle en perspective d'un dispositif de tirage conforme à l'invention associé à une mécanique Jacquard et
  • la figure 2 est une coupe selon la ligne II-II à la figure 1, à plus grande échelle et avec perspective.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of an embodiment of a heald drawing device in accordance with its principle, given solely by way of example and made with reference to the accompanying drawings in which:
  • FIG. 1 is a partial perspective representation of a drawing device in accordance with the invention associated with a Jacquard mechanism and
  • Figure 2 is a section along line II-II in Figure 1, on a larger scale and with perspective.

Le dispositif de tirage des lisses 1 d'un harnais Jacquard comprend, pour chaque lisse, un cylindre 2 à l'intérieur duquel est mobile un piston 3 muni de segments d'étanchéité 4. Une chambre de surpression 5 est ménagée au-dessus du piston 3. Cette chambre est alimentée en air comprimé grâce à un conduit 6 formé par un capot 7 disposé au-dessus et autour d'une embase 8 dans laquelle sont insérés plusieurs cylindres 2 formant une rangée alignée selon un axe XX'. Chaque rangée de cylindres est alimentée par un conduit commun 9, qui peut également servir de support aux embases 8, à partir d'une source commune, telle que le réseau de pression d'un atelier.The heald pulling device 1 of a Jacquard harness includes, for each boom, a cylinder 2 inside which is movable a piston 3 provided with sealing segments 4. A overpressure chamber 5 is provided above the piston 3. This room is supplied with compressed air through a duct 6 formed by a cover 7 arranged above and around a base 8 into which are inserted several cylinders 2 forming a row aligned along an axis XX '. Each row of cylinders is supplied by a common conduit 9, which can also serve as support for bases 8, from a common source, such as the pressure network of a workshop.

Compte tenu de la différence de pression régnant entre sa face supérieure et sa face inférieure, le piston 3 est en permanence poussé vers le bas par une force notée F à la figure 2. Pour transmettre la force F à la lisse 1 sans générer de fuites à partir de la chambre 5, une tige 10 est solidaire d'une part de la face inférieure du piston et d'autre part d'une plaque ou lame 11 sensiblement horizontale. La plaque 11 est, quant à elle, solidaire d'un étrier 12 formé de deux lames 12a sensiblement verticales et s'étendant vers le haut à partir de la plaque 11. Dans leur partie supérieure, les lames 12a sont reliées par une traverse 12b appartenant à l'étrier 12 et reliée dans sa partie centrale à la lisse 1. Ainsi, la force F est transmise par la tige rigide 10 à la plaque 11 et par l'intermédiaire des lames 12a à la traverse 12b qui la transmet elle-même à la lisse 1. A l'inverse, l'effort de traction F' provenant, à certains instants, de la mécanique Jacquard disposée au-dessus du harnais est transmis par la lisse 1 à la traverse 12b et, de là, aux lames 12a et à la plaque 11, ce qui a tendance à faire remonter le piston 3 à l'intérieur du cylindre 2 du fait de la connexion rigide réalisée par la tige 10 à l'encontre la force permanente de pression F.Taking into account the pressure difference between its upper face and its lower face, the piston 3 is constantly pushed down by a force noted F in FIG. 2. To transmit the force F to the arm 1 without generating leaks from the chamber 5, a rod 10 is secured on the one hand to the underside of the piston and on the other hand to a substantially horizontal plate or blade 11. The plate 11 is, for its part, integral with a stirrup 12 formed by two blades 12 a substantially vertical and extending upwards from the plate 11. In their upper part, the blades 12 a are connected by a cross member 12 b belonging to the stirrup 12 and connected in its central part to the beam 1. Thus, the force F is transmitted by the rigid rod 10 to the plate 11 and via the blades 12 a to the cross member 12 b which itself transmits it to the arm 1. Conversely, the tensile force F 'coming, at certain times, from the Jacquard mechanism placed above the harness is transmitted by the arm 1 to the cross member 12 b and, from there, to the blades 12 a and to the plate 11, which tends to cause the piston 3 to go back up inside the cylinder 2 due to the rigid connection made by the rod 10 against the permanent force pressure F.

La conjonction des forces F et F' permet d'obtenir un déplacement D du fil de chaíne 15 entre une position relevée et une position abaissée.The conjunction of the forces F and F 'makes it possible to obtain a displacement D of the chain wire 15 between a raised position and a lowered position.

Le cylindre 2 comprend dans sa partie inférieure une collerette interne 16 dont le diamètre intérieur est sensiblement plus petit que le diamètre du cylindre 2, de telle sorte que cette collerette constitue un moyen de guidage de la tige 10 en translation et éventuellement une butée de fin de course pour le piston 3. Cette collerette garantit que la tige 10 demeure sensiblement verticale, y compris lorsqu'un effort transversal exercé sur la lisse 1 a tendance à déplacer latéralement l'étrier 12.The cylinder 2 comprises in its lower part a internal collar 16 whose internal diameter is substantially smaller than the diameter of cylinder 2, so that this collar constitutes a means of guiding the rod 10 in translation and possibly a limit stop for piston 3. This flange guarantees that the rod 10 remains substantially vertical, even when an effort transverse exerted on the stringer 1 tends to move laterally the stirrup 12.

Une planche d'empoutage 17 est disposée au-dessus du dispositif de l'invention et présente des orifices 17a sensiblement alignés avec l'axe YY' du cylindre 2. Cet alignement garantit aussi qu'un effort transversal exercé sur la lisse 1 au-dessus de la planche d'empoutage ne sera pas transmis directement au dispositif de l'invention.A comber board 17 is disposed above the device of the invention and has openings 17 substantially aligned with the axis YY 'of the cylinder 2. This alignment also ensures that a transverse force exerted on the rail 1 in above the grading board will not be transmitted directly to the device of the invention.

Il convient de noter que les mouvements des lisses 1 sont déterminés en amplitude et en vitesse par la mécanique Jacquard, le dispositif de tirage opposant une résistance sensiblement constante à la remontée des lisses.It should be noted that the movements of the rails 1 are determined in amplitude and speed by Jacquard mechanics, the pulling device opposing a resistance substantially constant at the rise of the rails.

Comme il apparaít plus clairement à la figure 1, les étriers 12 associés aux cylindres 2 d'une rangée sont disposés sensiblement perpendiculairement à son axe principal XX', de telle sorte que leurs mouvements n'interfèrent pas avec l'embase 8.As appears more clearly in Figure 1, the stirrups 12 associated with cylinders 2 of a row are arranged substantially perpendicular to its main axis XX ', of so that their movements do not interfere with base 8.

L'étrier a été représenté avec des lames 12a rigides ou semi-rigides. La plaque 11 et la traverse 12b sont en permanence soumises à des efforts tendant à les écarter l'une de l'autre. Il n'est donc pas nécessaire que les éléments qui les relient soient rigides. Ainsi, l'étrier peut être formé de fils, étant entendu que la traverse 12b peut même être supprimée, les fils de l'étrier se rejoignant à leur point d'attache avec la lisse 1. Dans ce cas, les fils sont maintenus écartés grâce à un dispositif approprié ou frottent contre le capot 7.The bracket has been shown with blades 12 has rigid or semi-rigid. The plate 11 and the cross member 12 b are permanently subjected to forces tending to separate them from one another. It is therefore not necessary that the elements connecting them are rigid. Thus, the stirrup can be formed of wires, it being understood that the cross-member 12 b can even be eliminated, the wires of the stirrup joining at their point of attachment with the rail 1. In this case, the wires are held spread apart by an appropriate device or rub against the cover 7.

Claims (9)

  1. A drawing device for a heald (1) of a weaving loom of the Jacquard type, comprising a piston (2) connected kinematically to said heald, said piston being movable in a cylinder (2) under the action (F) of a pressure greater than the atmospheric pressure prevailing in a chamber (5) and a tractive force (F') exerted by said heald, characterised in that the connection between said piston and said heald comprises a rod (10) integral on the one hand with said piston and on the other hand with a stirrup member (12) disposed about said cylinder, said stirrup member being connected to said heald.
  2. A drawing device according to claim 1, characterised in that, in its lower end part, said cylinder (2) carries means (16) for guiding said rod (10) translationally.
  3. A drawing device according to claim 1, characterised in that it comprises a plurality of cylinders (2) disposed in rows and supplied with compressed air from a common source via a duct (6) common to the cylinders of each row.
  4. A drawing device according to claim 3, characterised in that the stirrup members (12) associated with the cylinders (2) of a row are disposed substantially perpendicularly to the main axis (XX') of said row.
  5. A drawing device according to claim 3, characterised in that said cylinders (2) are aligned with the passage openings (17a) in a harness tie board (17).
  6. A drawing device according to claim 1, characterised in that said piston (3) is provided with sealing rings (4).
  7. A drawing device according to claim 1, characterised in that said stirrup member (12) is formed of rigid or semirigid strips (12a).
  8. A drawing device according to claim 1, characterised in that said stirrup member is formed of wires.
  9. A dobby for weaving looms of the Jacquard type, comprising a drawing device according to one of the preceding claims.
EP19980420023 1997-02-13 1998-02-06 Tensioner and shedding mechanism with such a tensioner Expired - Lifetime EP0860528B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9701914 1997-02-13
FR9701914A FR2759385B1 (en) 1997-02-13 1997-02-13 DRAWING DEVICE AND MECHANICS OF WEAVING WEAVE COMPRISING SUCH A DEVICE

Publications (2)

Publication Number Publication Date
EP0860528A1 EP0860528A1 (en) 1998-08-26
EP0860528B1 true EP0860528B1 (en) 2000-05-24

Family

ID=9503883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980420023 Expired - Lifetime EP0860528B1 (en) 1997-02-13 1998-02-06 Tensioner and shedding mechanism with such a tensioner

Country Status (4)

Country Link
EP (1) EP0860528B1 (en)
JP (1) JP4072230B2 (en)
DE (1) DE69800156D1 (en)
FR (1) FR2759385B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1748051B (en) * 2003-02-07 2010-09-29 格罗兹-贝克特公司 Pre-tensioning device for healds

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1016217A5 (en) 2004-09-28 2006-05-02 Wiele Michel Van De Nv GAAPING DEVICE AND WEAVING MACHINE FITTED WITH SUCH GAAPING DEVICE.
CN101058912B (en) * 2007-05-29 2011-09-14 浙江理工大学 Air-actuated jacquard device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1482640A (en) * 1974-10-23 1977-08-10 Autosyst Ltd Warp selection devices
DE2631175B1 (en) * 1976-07-10 1977-12-29 Wolfgang Ebisch RETURN DEVICE FOR THE WEAVING STRANDS OF A JACQUARD WEAVING MACHINE
DE2939421C2 (en) * 1979-09-28 1981-09-24 Grosse Webereimaschinen Gmbh, 7910 Neu-Ulm Device for raising and lowering the warp threads of a weaving machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1748051B (en) * 2003-02-07 2010-09-29 格罗兹-贝克特公司 Pre-tensioning device for healds

Also Published As

Publication number Publication date
FR2759385A1 (en) 1998-08-14
JPH10292243A (en) 1998-11-04
EP0860528A1 (en) 1998-08-26
FR2759385B1 (en) 1999-04-16
JP4072230B2 (en) 2008-04-09
DE69800156D1 (en) 2000-06-29

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