EP0849384A1 - Shedding mechanism, method of assembly thereof and Jacuard loom with such a mechanism - Google Patents

Shedding mechanism, method of assembly thereof and Jacuard loom with such a mechanism Download PDF

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Publication number
EP0849384A1
EP0849384A1 EP97420236A EP97420236A EP0849384A1 EP 0849384 A1 EP0849384 A1 EP 0849384A1 EP 97420236 A EP97420236 A EP 97420236A EP 97420236 A EP97420236 A EP 97420236A EP 0849384 A1 EP0849384 A1 EP 0849384A1
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EP
European Patent Office
Prior art keywords
crowd
plates
modules
shafts
longitudinal
Prior art date
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Granted
Application number
EP97420236A
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German (de)
French (fr)
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EP0849384B1 (en
Inventor
Joseph Palau
Dario Bassi
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Staeubli Lyon SA
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Staeubli Lyon SA
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Publication of EP0849384A1 publication Critical patent/EP0849384A1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • 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
    • D03C3/32—Jacquard driving mechanisms
    • D03C3/36—Griffe operating mechanisms

Definitions

  • the invention relates to a device for training the crowd for Jacquard type loom, to a process of mounting such a device and a loom equipped with a such a crowd formation device or mounted according to such process.
  • the invention is more particularly centered on vertical actuation, in phase opposition, of the two series of blades or knives which control the armor hooks.
  • hooks are arranged in separate parallel rows each others by spaces in each of which moves vertically a knife.
  • This knife is most often supported by one of two claw frames.
  • Each frame is suspended on levers animated by an oscillating movement of way of alternately lowering and raising, being observed that the vertical movements of the knives take place simultaneously, in opposite directions, in order to operate the opening of the pitch for the insertion of the weft thread.
  • the output shaft of the loom on which must be installed the crowd training device can be located on the left or right side of this trade. It is customary to provide that the crowd training device can be adapted to trades with output shaft on the left or right.
  • the weaver who will use the trade decides to change type or supplier of trade while he maintains his choice regarding the device crowd training, so sometimes it's necessary to change the entry side of the movement in the crowd training device.
  • this modification is long and complex. In particular, it induces major interventions on the organs mechanical peripherals such as chassis and transmission elements.
  • the coaxial longitudinal shafts constitute an efficient and not very complex device allowing to transform, with the cam mechanism, the movement of the input shaft in motion control frames claws.
  • the rigid tube, the plates and the shafts longitudinal co-axials constitute a solid whole which can be handled in a unitary way, for example by means of a hoist, in order to be placed on the structure of the device crowd training. This gives great flexibility when manufacturing crowd training devices in accordance with the invention, insofar as the assembly formed of longitudinal shafts, tube, plates and mechanism cams can be mounted on the device structure when the side by which the movement enters the device crowd formation is known for certain.
  • the plates are removably mounted on the structure of the device.
  • This aspect of the invention facilitates operations maintenance because, when it is necessary to access, by example, to the hook selection modules of the crowd formation, we can separate the plates from the structure and remove the drive assembly formed by the plates, shafts, tube and cam mechanism.
  • the plates are suitable for mounting on the structure in two positions corresponding respectively to the positioning of the input shaft on either side of the device.
  • This aspect of the invention therefore makes it possible to achieve, with the same training set, a crowd training device with movement input on the right or on the left.
  • the plates are asymmetrical, that is to say the axis common to the longitudinal shafts and to the tube is offset by relative to the center line of the plates.
  • This variant of the invention provides an oblique crowd in a simple way.
  • the plates are symmetrical, i.e. the axis common to the trees longitudinal and to the tube is intersecting with the median axis of said platinum.
  • This aspect of the invention allows the same plates for mounting in the two corresponding positions to an entry of the movement on the right and an entry of the left movement.
  • the crowd training system when the crowd training system includes electromagnetic modules for selecting hooks in support on knives, these modules are distributed in baskets able to be put in place in the device once the modules in place in the baskets.
  • This aspect of the invention allows to prepare the modules outside the device crowd formation, that is to say in particular on a workbench allowing comfortable work for an operator and of good quality and then install them in groups in the device of the invention.
  • the invention also relates to a method for mounting a crowd training device, especially such as previously described.
  • This process is characterized in that it consists in pre-mounting on the one hand a structure equipped with selection modules and secondly as a training set rigid comprising two longitudinal shafts arranged co-axially inside a rigid tube integral with two plates and a cam mechanism and mounting said assembly drive on said structure equipped with modules.
  • This two-stage mounting provides both good flexibility in the manufacture of the device, in particular subject of the input side of the drive movement, and a improvement of the working conditions of operators who can perform their tasks under conditions suitable for assembly of each subset considered.
  • the drive assembly can, if necessary, be pre-mounted in a clean room and moved to the device structure crowd training when all of its hoods protection are in place.
  • the method further consists in equipping the structure with distributed modules in pre-assembled baskets. This further facilitates the work operators.
  • mounting the drive assembly on the structure fitted with modules is removable. This character removable allows to separate these assemblies, in particular in case of modification of the customer's order or for maintenance operations.
  • the invention finally relates to a loom of the type Jacquard equipped with a crowd training device such as previously described or mounted using the above method.
  • the knives or blades of a mechanism for crowd formation are divided into two groups 1 and 1 ' each hanging from a frame of claws animated by movements of vertical back-and-forth in phase opposition.
  • the frames of claws are formed by bars 2 and 3.
  • the ends of the bars 2 and 3 are engaged in slides 4 rigidly attached to the frame of the device which is not shown in the Figure 1, but which appears in Figure 2 in the form of two beams 5 and 6 with C section.
  • each bar belonging to the claw frame is associated with a substantially horizontal lever.
  • These levers bear the references 7 and 8 and are respectively associated with bars 2 and 3.
  • One end of each lever is coupled to the corresponding bar while the opposite end pivots on the fixed frame around an axis X 1 -X 1 'fixed.
  • the slides 4 can be omitted because the bars 2 and 3 have a length which does not require very precise guidance.
  • a shaft 10 input of the crowd training device movement is mounted above the knives 1 and 1 ′.
  • This shaft 10 is connected by means of a coupling 11 to a second shaft 12 driven in continuous rotation by the shaft of the loom to which the crowd training device is associated.
  • each cam 13 or 14 is constituted by two eccentric discs, fixed side by side on the same hub, the eccentricities being oriented one opposite the other in each cam.
  • the periphery of the discs of the two cams 13 and 14 form a rolling track for rollers 15, shown in the form of arrows, which are carried by radial arms 16 a , 16 b , 17 a and 17 b , oriented opposite from each other and axially offset from each other.
  • These arms form two rockers 16 and 17.
  • the rocker 16 is fixed at the end of a shaft 20, mounted coaxially inside a shaft 21 of length slightly shorter than that of the shaft 20.
  • the rocker 17 is fixed at the end of the shaft 21.
  • the two shafts 20 and 21 are arranged co-axially inside a rigid tube 22 integral with two plates 23 and 24 capable of being assembled on beams 5 and 6, for example by means of screws represented by their center lines 25 and 26 in Figure 2.
  • the two co-axial shafts 20 and 21 are suitably supported rotating in bearings fitted in the plates 23 and 24 and they are oriented along the median longitudinal axis of the mechanical frame in the upper part of it.
  • the cam mechanism consisting of elements 13 to 17 ensures transformation of the continuous rotation movement of the shaft input 10 in an oscillating motion, while the two coaxial shafts 20 and 21 are moved alternately, in synchronism and in phase opposition, one by compared to each other.
  • the outer shaft 21 is cut out from two openings 21 a offset axially from one another and oriented opposite one of the 'other.
  • Each of these lights 21a is traversed by a lever 28 fixed radially to the inner shaft 20.
  • a lever 29 is fixed radially to the outer shaft 21 along the axis of the lever 28 corresponding .
  • Each of the pairs of opposite levers 28 and 29 therefore constitutes a sort of plague which the two concentric shafts 20 and 21 animate with an oscillating movement.
  • the tube 22 allows constitute a rigid unit that can be described as “whole "with trees 10, 20 and 21 and the plates 23 and 24, this assembly being able to be mounted in one operation, on a structure that includes modules of selection of hooks belonging to the training device a crowd.
  • the tube 22 is connected to the plates 23 and 24 by means of upper extensions 23 a and 24 a and lower 23 b and 24 b disposed respectively above and below the pairs of levers 28 and 29 at the two ends of the tube 22.
  • Each lever 28 and 29 is pierced by an arcuate slot 28a, respectively 29a for the adjustable fastening of a vertical rod 30 shown in axis lines in Figure 1.
  • the links 30 allow to alternately raise the bars 2 and 3.
  • the movement of the costers 1 and 1 ′ is obtained from the rotation of the shaft 10 thanks to the transformation of the continuous rotation movement into a reciprocating oscillation movement inside the tube 22.
  • baskets 31 are provided in which are installed selection modules 31 ′, for example electromagnetic, intended to immobilize the hooks connected to the rails of the harness of Jacquard mechanics at a given point in their path.
  • These modules can be of any known type.
  • the baskets 31 are easily placed between beams 5 and 6 because access to the volume located between these beams is free from the fact that the drive device bars 2 and 3, visible in Figure 1, are not yet installed.
  • Another operator can proceed, in a workshop specially dedicated, and in particular in a clean room, to the assembly of the rigid drive assembly which includes the input shaft 10, the two longitudinal shafts 20 and 21, the tube 22, the plates 23 and 24 and the cam mechanism 13 to 17 which appears once mounted in the upper part of figure 2.
  • this drive assembly is provided with a cover 33 which protects the cam mechanism while a sleeve 34 surrounds the shaft 10 being fixed on the cover 33.
  • the assembly drive is a rigid and robust device that can be manipulated, for example by means of a hoist, in order to be place on the structure, represented by beams 5 and 6, fitted with modules, after the baskets have been put in place 31.
  • the assembly of the drive unit on the beams 5 and 6 is made of removably, so that during a maintenance operation, it is possible to separate the drive assembly from rest of the structure of the crowd training device in order to intervene, on the modules by removing the baskets 31.
  • the plates 23 and 24 are symmetrical, that is to say that the axis XX 'is intersecting with the median axis YY 'of these plates, so that the same set of drive can be mounted with the input shaft oriented on one side or the other of the device for forming the crowd.
  • This device is also capable of performing a crowd oblique, even if the mechanical stresses are greater than in the case where the plates are asymmetrical.
  • the structure rigid formed essentially by the tube 22 and the plates 23 and 24 supports the shaft 10 overhanging, which avoids providing a force recovery leg on the beams 5 and 6 for the support of the shaft 10.
  • the lower structure of the device of the invention is thus simplified.

Abstract

The mechanism to form the shed, in a Jacquard loom, has two coaxial shafts (20,21) within a rigid tube (22) held by fixed support plates (23,24) at the ends. A cam assembly (13-17) gives an alternating rotary movement to the shafts, from a drive input shaft. Also claimed is an assembly operation. Initially, the structures (5,6) are assembled with the selection modules (31'). The coaxial shafts are fitted into a rigid tube, which is supported by rigid mounting plates at the ends. A cam mechanism is fitted to the drive assembly, on the structure fitted with the selection modules.

Description

L'invention a trait à un dispositif de formation de la foule pour métier à tisser de type Jacquard, à un procédé de montage d'un tel dispositif et à un métier à tisser équipé d'un tel dispositif de formation de la foule ou monté selon un tel procédé. L'invention est plus particulièrement centrée sur l'actionnement vertical, en opposition de phases, des deux séries de lames ou couteaux qui assurent la commande des crochets d'une mécanique d'armure.The invention relates to a device for training the crowd for Jacquard type loom, to a process of mounting such a device and a loom equipped with a such a crowd formation device or mounted according to such process. The invention is more particularly centered on vertical actuation, in phase opposition, of the two series of blades or knives which control the armor hooks.

Dans un dispositif de formation de la foule, des crochets sont disposés suivant des rangées parallèles séparées les unes des autres par des espaces dans chacun desquels se déplace verticalement un couteau. Ce couteau est le plus souvent supporté par l'un de deux cadres de griffes. Chaque cadre est suspendu à des leviers animés d'un mouvement oscillant de manière à s'abaisser et à s'élever alternativement, étant observé que les déplacements verticaux des couteaux s'effectue simultanément, en sens inverse l'un de l'autre, afin d'opérer l'ouverture du pas pour l'insertion du fil de trame.In a crowd training device, hooks are arranged in separate parallel rows each others by spaces in each of which moves vertically a knife. This knife is most often supported by one of two claw frames. Each frame is suspended on levers animated by an oscillating movement of way of alternately lowering and raising, being observed that the vertical movements of the knives take place simultaneously, in opposite directions, in order to operate the opening of the pitch for the insertion of the weft thread.

Dans les mécaniques traditionnelles telles que, notamment, connues de la demande de brevet FR-A-2 669 650, il est prévu un arbre unique qui est lié à l'arbre principal du métier à tisser et qui s'étend sur toute la largeur du bâti de la mécanique. Au voisinage de chacune de ses extrémités, cet arbre, qui est animé d'un mouvement de rotation continue, est équipé de deux systèmes adjacents de cames ou excentriques propres à transformer cette rotation continue en une rotation alternative afin de conférer au levier qui porte les cadres de griffes le mouvement d'abaissement et de levée désiré. Ces mécaniques traditionnelles présentent un certain nombre d'inconvénients. La présence des mécanismes pour la transformation du mouvement continu en mouvement alternatif augmente sensiblement le coût de l'ensemble en même temps qu'elle accroít l'encombrement du mécanisme d'actionnement et gêne l'accessibilité aux crochets de la mécanique. Par ailleurs, ces mécanismes de transformation compliquent la structure générale du bâti.In traditional mechanics such as, in particular, known from patent application FR-A-2 669 650, there is provided a single tree which is linked to the main tree of the loom and which extends over the entire width of the mechanical frame. At neighborhood of each of its ends, this tree, which is driven by a continuous rotation movement, is equipped with two adjacent cam or eccentric systems suitable for conversion this rotation continues in an alternative rotation in order to give the lever that carries the claw frames the movement desired lowering and lifting. These traditional mechanics have a number of drawbacks. The presence mechanisms for transforming continuous movement into reciprocating movement significantly increases the cost of the whole at the same time as it increases the size of the mechanism and hinders accessibility to the hooks of the mechanical. Furthermore, these transformation mechanisms complicate the general structure of the frame.

En outre, l'arbre de sortie du métier à tisser sur lequel doit être installé le dispositif de formation de la foule peut être situé du côté gauche ou du côté droit de ce métier. Il est d'usage de prévoir que le dispositif de formation de la foule puisse être adapté à des métiers avec arbre de sortie à gauche ou à droite. Cependant, il arrive que le tisseur qui utilisera le métier décide de changer de type ou de fournisseur de métier alors qu'il maintient son choix en ce qui concerne le dispositif de formation de la foule, de sorte qu'il est parfois nécessaire de changer le côté d'entrée du mouvement dans le dispositif de formation de la foule. Avec les dispositifs connus, cette modification est longue et complexe. En particulier, elle induit des interventions importantes sur les organes périphériques de la mécanique tels que le châssis et les éléments de transmission.In addition, the output shaft of the loom on which must be installed the crowd training device can be located on the left or right side of this trade. It is customary to provide that the crowd training device can be adapted to trades with output shaft on the left or right. However, sometimes the weaver who will use the trade decides to change type or supplier of trade while he maintains his choice regarding the device crowd training, so sometimes it's necessary to change the entry side of the movement in the crowd training device. With the devices known, this modification is long and complex. In particular, it induces major interventions on the organs mechanical peripherals such as chassis and transmission elements.

C'est à ces inconvénients qu'entend principalement remédier la présente invention, laquelle consiste essentiellement à prévoir deux arbres longitudinaux disposés co-axialement à l'intérieur d'un tube rigide solidaire de deux platines de support desdits arbres et d'un mécanisme à cames transmettant un mouvement de rotation alternatif d'un arbre d'entrée du dispositif de formation de la foule aux arbres longitudinaux.These are the disadvantages remedy the present invention, which essentially consists to provide two longitudinal shafts arranged co-axially inside a rigid tube integral with two plates of support of said shafts and of a cam mechanism transmitting an alternating rotational movement of an input shaft of the crowd training device for longitudinal trees.

Grâce à l'invention, les arbres longitudinaux co-axiaux constituent un dispositif efficace et peu complexe permettant de transformer, avec le mécanisme à cames, le mouvement de l'arbre d'entrée en mouvement de commande des cadres de griffes. Grâce au tube rigide, les platines et les arbres longitudinaux co-axiaux constituent un ensemble solide qui peut être manipulé de façon unitaire, par exemple au moyen d'un palan, afin d'être placé sur la structure du dispositif de formation de la foule. On obtient ainsi, une grande flexibilité lors de la fabrication de dispositifs de formation de la foule conforme à l'invention, dans la mesure où l'ensemble formé des arbres longitudinaux, du tube, des platines et du mécanisme à cames peut être monté sur la structure du dispositif lorsque le côté par lequel le mouvement entre dans le dispositif de formation de la foule est connu de façon certaine.Thanks to the invention, the coaxial longitudinal shafts constitute an efficient and not very complex device allowing to transform, with the cam mechanism, the movement of the input shaft in motion control frames claws. Thanks to the rigid tube, the plates and the shafts longitudinal co-axials constitute a solid whole which can be handled in a unitary way, for example by means of a hoist, in order to be placed on the structure of the device crowd training. This gives great flexibility when manufacturing crowd training devices in accordance with the invention, insofar as the assembly formed of longitudinal shafts, tube, plates and mechanism cams can be mounted on the device structure when the side by which the movement enters the device crowd formation is known for certain.

Selon un premier aspect avantageux de l'invention, les platines sont montées de façon amovible sur la structure du dispositif. Cet aspect de l'invention, facilite les opérations de maintenance car, lorsqu'il est nécessaire d'accéder, par exemple, aux modules de sélection des crochets du dispositif de formation de la foule, on peut désolidariser les platines de la structure et ôter l'ensemble d'entraínement formé par les platines, les arbres, le tube et le mécanisme à cames.According to a first advantageous aspect of the invention, the plates are removably mounted on the structure of the device. This aspect of the invention facilitates operations maintenance because, when it is necessary to access, by example, to the hook selection modules of the crowd formation, we can separate the plates from the structure and remove the drive assembly formed by the plates, shafts, tube and cam mechanism.

Selon un autre aspect avantageux de l'invention, les platines sont aptes à être montées sur la structure dans deux positions correspondant respectivement au positionnement de l'arbre d'entrée d'un côté ou de l'autre du dispositif. Cet aspect de l'invention permet donc de réaliser, avec le même ensemble d'entraínement, un dispositif de formation de la foule avec entrée du mouvement à droite ou à gauche.According to another advantageous aspect of the invention, the plates are suitable for mounting on the structure in two positions corresponding respectively to the positioning of the input shaft on either side of the device. This aspect of the invention therefore makes it possible to achieve, with the same training set, a crowd training device with movement input on the right or on the left.

Selon un premier mode de réalisation avantageux de l'invention, les platines sont asymétriques, c'est-à-dire l'axe commun aux arbres longitudinaux et au tube est décalé par rapport à l'axe médian des platines. Cette variante de l'invention permet d'obtenir de façon simple une foule oblique.According to a first advantageous embodiment of the invention, the plates are asymmetrical, that is to say the axis common to the longitudinal shafts and to the tube is offset by relative to the center line of the plates. This variant of the invention provides an oblique crowd in a simple way.

Selon une autre variante avantageuse de l'invention, les platines sont symétriques, c'est-à-dire l'axe commun aux arbres longitudinaux et au tube est sécant avec l'axe médian de ladite platine. Cet aspect de l'invention permet d'utiliser les mêmes platines pour leur montage dans les deux positions correspondant à une entrée du mouvement à droite et une entrée du mouvement à gauche.According to another advantageous variant of the invention, the plates are symmetrical, i.e. the axis common to the trees longitudinal and to the tube is intersecting with the median axis of said platinum. This aspect of the invention allows the same plates for mounting in the two corresponding positions to an entry of the movement on the right and an entry of the left movement.

Selon un autre aspect particulièrement avantageux de l'invention, utilisable avec tous les types de platines, lorsque le dispositif de formation de la foule comprend des modules électro-magnétiques de sélection des crochets en appui sur les couteaux, ces modules sont répartis dans des paniers aptes à être mis en place dans le dispositif une fois les modules en place dans les paniers. Cet aspect de l'invention permet de préparer les modules à l'extérieur du dispositif de formation de la foule, c'est-à-dire en particulier sur un établi permettant un travail confortable pour un opérateur et de bonne qualité et de les installer ensuite par groupes dans le dispositif de l'invention.According to another particularly advantageous aspect of the invention, usable with all types of plates, when the crowd training system includes electromagnetic modules for selecting hooks in support on knives, these modules are distributed in baskets able to be put in place in the device once the modules in place in the baskets. This aspect of the invention allows to prepare the modules outside the device crowd formation, that is to say in particular on a workbench allowing comfortable work for an operator and of good quality and then install them in groups in the device of the invention.

L'invention concerne aussi un procédé de montage d'un dispositif de formation de la foule, en particulier tel que décrit précédemment. Ce procédé est caractérisé en ce qu'il consiste à pré-monter d'une part une structure équipée de modules de sélection et d'autre part en ensemble d'entraínement rigide comprenant deux arbres longitudinaux disposés co-axialement à l'intérieur d'un tube rigide solidaire de deux platines et un mécanisme à cames et à monter ledit ensemble d'entraínement sur ladite structure équipée de modules. Ce montage en deux temps permet d'obtenir à la fois une bonne souplesse dans la fabrication du dispositif, en particulier au sujet du côté d'entrée du mouvement d'entraínement, et une amélioration des conditions de travail des opérateurs qui peuvent effectuer leurs tâches dans des conditions adaptées au montage de chaque sous-ensemble considéré. En particulier, l'ensemble d'entraínement peut, si nécessaire, être pré-monté dans une salle blanche et déplacé vers la structure du dispositif de formation de la foule lorsque tous ses capots de protection sont en place.The invention also relates to a method for mounting a crowd training device, especially such as previously described. This process is characterized in that it consists in pre-mounting on the one hand a structure equipped with selection modules and secondly as a training set rigid comprising two longitudinal shafts arranged co-axially inside a rigid tube integral with two plates and a cam mechanism and mounting said assembly drive on said structure equipped with modules. This two-stage mounting provides both good flexibility in the manufacture of the device, in particular subject of the input side of the drive movement, and a improvement of the working conditions of operators who can perform their tasks under conditions suitable for assembly of each subset considered. In particular, the drive assembly can, if necessary, be pre-mounted in a clean room and moved to the device structure crowd training when all of its hoods protection are in place.

Selon une variante avantageuse de l'invention, le procédé consiste en outre à équiper la structure en modules répartis dans des paniers pré-montés. Ceci facilite encore le travail des opérateurs.According to an advantageous variant of the invention, the method further consists in equipping the structure with distributed modules in pre-assembled baskets. This further facilitates the work operators.

Selon un autre aspect avantageux du procédé de l'invention, le montage de l'ensemble d'entraínement sur la structure équipée de modules est réalisé de façon amovible. Ce caractère amovible permet de désolidariser ces ensembles, en particulier en cas de modification de la commande du client ou pour des opérations de maintenance.According to another advantageous aspect of the process of the invention, mounting the drive assembly on the structure fitted with modules is removable. This character removable allows to separate these assemblies, in particular in case of modification of the customer's order or for maintenance operations.

L'invention concerne enfin un métier à tisser du type Jacquard équipé d'un dispositif de formation de la foule tel que précédemment décrit ou monté grâce au procédé ci-dessus.The invention finally relates to a loom of the type Jacquard equipped with a crowd training device such as previously described or mounted using the above method.

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 formation de la foule pour métier à tisser conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective des éléments cinématiques d'un dispositif de formation de la foule conforme à l'invention ;
  • la figure 2 est une vue en perspective éclatée d'un dispositif de formation de la foule conforme à l'invention en cours de montage et
  • la figure 3 est une coupe axiale schématique partielle d'un dispositif conforme à l'invention.
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 crowd training device for a weaving loom in accordance with its principle. , given solely by way of example and with reference to the appended drawings in which:
  • Figure 1 is a perspective view of the kinematic elements of a crowd forming device according to the invention;
  • FIG. 2 is an exploded perspective view of a crowd formation device according to the invention during assembly and
  • Figure 3 is a partial schematic axial section of a device according to the invention.

A la figure 1, les couteaux ou lames d'un mécanisme de formation de la foule sont divisés en deux groupes 1 et 1' suspendus chacun à un cadre de griffes animé de mouvements de va-et-vient verticaux en opposition de phases. Les cadres de griffes sont formés par des barres 2 et 3. Les extrémités des barres 2 et 3 sont engagées dans des coulisses 4 rigidement fixées au bâti du dispositif qui n'est pas représenté à la figure 1, mais qui apparaít à la figure 2 sous la forme de deux poutres 5 et 6 à section en C.In FIG. 1, the knives or blades of a mechanism for crowd formation are divided into two groups 1 and 1 ' each hanging from a frame of claws animated by movements of vertical back-and-forth in phase opposition. The frames of claws are formed by bars 2 and 3. The ends of the bars 2 and 3 are engaged in slides 4 rigidly attached to the frame of the device which is not shown in the Figure 1, but which appears in Figure 2 in the form of two beams 5 and 6 with C section.

Afin d'améliorer le guidage de son mouvement vertical alternatif, chaque barre appartenant au cadre de griffes est associée à un levier sensiblement horizontal. Ces leviers portent les références 7 et 8 et sont respectivement associés aux barres 2 et 3. L'une des extrémités de chaque levier est attelée à la barre correspondante alors que l'extrémité opposée pivote sur le bâti fixe autour d'un axe X1-X1' fixe. Dans le cas où la profondeur de la machine, parfois dénommée profondeur de garnissage, est relativement faible, par exemple inférieure à 800 mm, on peut supprimer les coulisses 4 car les barres 2 et 3 ont une longueur ne nécessitant pas de guidage très précis.In order to improve the guidance of its alternating vertical movement, each bar belonging to the claw frame is associated with a substantially horizontal lever. These levers bear the references 7 and 8 and are respectively associated with bars 2 and 3. One end of each lever is coupled to the corresponding bar while the opposite end pivots on the fixed frame around an axis X 1 -X 1 'fixed. In the case where the depth of the machine, sometimes called the packing depth, is relatively small, for example less than 800 mm, the slides 4 can be omitted because the bars 2 and 3 have a length which does not require very precise guidance.

Au-dessus des couteaux 1 et 1' est monté un arbre 10 d'entrée du mouvement du dispositif de formation de la foule. Cet arbre 10 est raccordé au moyen d'un accouplement 11 à un second arbre 12 entraíné en rotation continue par l'arbre du métier à tisser auquel le dispositif de formation de la foule est associé.Above the knives 1 and 1 ′ is mounted a shaft 10 input of the crowd training device movement. This shaft 10 is connected by means of a coupling 11 to a second shaft 12 driven in continuous rotation by the shaft of the loom to which the crowd training device is associated.

Sur la partie de l'arbre 10 qui est disposée à l'opposé de l'accouplement 11 sont calées deux cames conjuguées 13 et 14 qui apparaissent plus clairement à la figue 3. De façon connue en soi, chaque came 13 ou 14 est constituée par deux disques excentrés, fixés côte à côte sur un même moyeu, les excentrations étant orientées l'une à l'opposé de l'autre dans chaque came. La périphérie des disques des deux cames 13 et 14 forment piste de roulement pour des galets 15, figurés sous la forme de flèches, qui sont portés par des bras radiaux 16a, 16b, 17a et 17b, orientés à l'opposé l'un de l'autre et décalés axialement l'un par rapport à l'autre. Ces bras forment deux bascules 16 et 17. La bascule 16 est fixée en bout d'un arbre 20, monté de façon co-axiale à l'intérieur d'un arbre 21 de longueur légèrement inférieure à celle de l'arbre 20. La bascule 17 est fixée en bout de l'arbre 21.On the part of the shaft 10 which is disposed opposite the coupling 11 are wedged two conjugate cams 13 and 14 which appear more clearly in fig 3. In a manner known per se, each cam 13 or 14 is constituted by two eccentric discs, fixed side by side on the same hub, the eccentricities being oriented one opposite the other in each cam. The periphery of the discs of the two cams 13 and 14 form a rolling track for rollers 15, shown in the form of arrows, which are carried by radial arms 16 a , 16 b , 17 a and 17 b , oriented opposite from each other and axially offset from each other. These arms form two rockers 16 and 17. The rocker 16 is fixed at the end of a shaft 20, mounted coaxially inside a shaft 21 of length slightly shorter than that of the shaft 20. The rocker 17 is fixed at the end of the shaft 21.

Conformément à l'invention, les deux arbres 20 et 21 sont disposés co-axialement à l'intérieur d'un tube rigide 22 solidaire de deux platines 23 et 24 susceptibles d'être assemblées sur les poutres 5 et 6, par exemple au moyen de vis représentées par leurs traits d'axes 25 et 26 à la figure 2. Les deux arbres co-axiaux 20 et 21 sont convenablement supportés à rotation dans des roulements rapportés dans les platines 23 et 24 et ils sont orientés suivant l'axe longitudinal médian du bâti de la mécanique dans la partie supérieure de celui-ci. Le mécanisme à cames constitué par les éléments 13 à 17 assure la transformation du mouvement de rotation continue de l'arbre d'entrée 10 en un mouvement oscillant, alors que les deux arbres co-axiaux 20 et 21 sont animés d'un déplacement alternatif, en synchronisme et en opposition de phases, l'un par rapport à l'autre.According to the invention, the two shafts 20 and 21 are arranged co-axially inside a rigid tube 22 integral with two plates 23 and 24 capable of being assembled on beams 5 and 6, for example by means of screws represented by their center lines 25 and 26 in Figure 2. The two co-axial shafts 20 and 21 are suitably supported rotating in bearings fitted in the plates 23 and 24 and they are oriented along the median longitudinal axis of the mechanical frame in the upper part of it. The cam mechanism consisting of elements 13 to 17 ensures transformation of the continuous rotation movement of the shaft input 10 in an oscillating motion, while the two coaxial shafts 20 and 21 are moved alternately, in synchronism and in phase opposition, one by compared to each other.

Au voisinage immédiat de la face intérieure de chacune des deux platines 23 et 24, l'arbre extérieur 21 est découpé de deux lumières 21a décalées axialement l'une par rapport à l'autre et orientées à l'opposé l'une de l'autre. Chacune de ces lumières 21a est traversée par un levier 28 fixé radialement à l'arbre intérieur 20. A l'opposé de chaque levier 28, un levier 29 est solidaire radialement de l'arbre extérieur 21 suivant l'axe du levier 28 correspondant. Chacune des paires de leviers 28 et 29 opposés constitue donc une sorte de fléau que les deux arbres concentriques 20 et 21 animent d'un mouvement oscillant.In the immediate vicinity of the inner face of each of the two plates 23 and 24, the outer shaft 21 is cut out from two openings 21 a offset axially from one another and oriented opposite one of the 'other. Each of these lights 21a is traversed by a lever 28 fixed radially to the inner shaft 20. At the opposite of each lever 28, a lever 29 is fixed radially to the outer shaft 21 along the axis of the lever 28 corresponding . Each of the pairs of opposite levers 28 and 29 therefore constitutes a sort of plague which the two concentric shafts 20 and 21 animate with an oscillating movement.

Comme représenté à la figure 2, le tube 22 permet de constituer un ensemble rigide que l'on peut qualifier "d'ensemble d'entraínement" avec les arbres 10, 20 et 21 et les platines 23 et 24, cet ensemble pouvant être monté, en une opération, sur une structure qui comprend des modules de sélection des crochets appartenant au dispositif de formation de la foule.As shown in Figure 2, the tube 22 allows constitute a rigid unit that can be described as "whole "with trees 10, 20 and 21 and the plates 23 and 24, this assembly being able to be mounted in one operation, on a structure that includes modules of selection of hooks belonging to the training device a crowd.

Le tube 22 est relié aux platines 23 et 24 grâce à des extensions supérieures 23a et 24a et inférieures 23b et 24b disposées respectivement au-dessus et en dessous des paires de leviers 28 et 29 aux deux extrémités du tube 22.The tube 22 is connected to the plates 23 and 24 by means of upper extensions 23 a and 24 a and lower 23 b and 24 b disposed respectively above and below the pairs of levers 28 and 29 at the two ends of the tube 22.

Chaque levier 28 et 29 est percé d'une lumière arquée 28a, respectivement 29a, pour la fixation réglable d'une biellette verticale 30 représentée en traits d'axes à la figure 1. Les biellettes 30 permettent de soulever alternativement les barres 2 et 3. Ainsi, le mouvement des couteux 1 et 1' est obtenu à partir de la rotation de l'arbre 10 grâce à la transformation du mouvement de rotation continu en un mouvement d'oscillation en va-et-vient à l'intérieur du tube 22.Each lever 28 and 29 is pierced by an arcuate slot 28a, respectively 29a for the adjustable fastening of a vertical rod 30 shown in axis lines in Figure 1. The links 30 allow to alternately raise the bars 2 and 3. Thus, the movement of the costers 1 and 1 ′ is obtained from the rotation of the shaft 10 thanks to the transformation of the continuous rotation movement into a reciprocating oscillation movement inside the tube 22.

Selon un aspect particulièrement avantageux de l'invention, des paniers 31 sont prévus dans lesquels sont installés des modules de sélection 31', par exemple électro-magnétiques, destinés à immobiliser les crochets reliés aux lisses du harnais de la mécanique Jacquard en un point donné de leur trajectoire. Ces modules peuvent être de tout type connu. L'utilisation des paniers 31, qui sont représentés vides à la figure 2 à l'exception d'un module 31' afin de simplifier le schéma, permet le remplissage des paniers en modules selon une configuration choisie, puis la mise en place de ces modules 31', par groupes correspondant chacun à un panier 31, entre les poutres 5 et 6. Cette façon de procéder permet de faciliter le montage en ce sens que chaque panier peut être équipé d'un nombre choisi de modules qui peuvent être testés au moyen d'un dispositif de capacité adaptée.According to a particularly advantageous aspect of the invention, baskets 31 are provided in which are installed selection modules 31 ′, for example electromagnetic, intended to immobilize the hooks connected to the rails of the harness of Jacquard mechanics at a given point in their path. These modules can be of any known type. The use of baskets 31, which are shown empty at the Figure 2 with the exception of a module 31 'to simplify the diagram, allows the baskets to be filled with modules according to a chosen configuration, then the installation of these modules 31 ', in groups each corresponding to a basket 31, between the beams 5 and 6. This procedure makes it easier to assembly in the sense that each basket can be equipped with a selected number of modules that can be tested using a adapted capacity device.

Ensuite, les paniers 31 sont facilement mis en place entre les poutres 5 et 6 car l'accès au volume situé entre ces poutres est libre du fait que le dispositif d'entraínement des barres 2 et 3, visibles à la figure 1, n'est pas encore installé. Un autre opérateur peut procéder, dans un atelier spécialement dédié, et notamment dans une salle blanche, au montage de l'ensemble d'entraínement rigide qui comprend l'arbre d'entrée 10, les deux arbres longitudinaux 20 et 21, le tube 22, les platines 23 et 24 et le mécanisme à cames 13 à 17 qui apparaít une fois monté à la partie supérieure de la figure 2. On note que cet ensemble d'entraínement est pourvu d'un capot 33 qui protège le mécanisme à cames alors qu'un manchon 34 entoure l'arbre 10 en étant fixé sur le capot 33. Ainsi, l'ensemble d'entraínement est un dispositif rigide et robuste pouvant être manipulé, par exemple au moyen d'un palan, afin d'être mis en place sur la structure, représentée par les poutres 5 et 6, équipée des modules, après la mise en place des paniers 31.Then, the baskets 31 are easily placed between beams 5 and 6 because access to the volume located between these beams is free from the fact that the drive device bars 2 and 3, visible in Figure 1, are not yet installed. Another operator can proceed, in a workshop specially dedicated, and in particular in a clean room, to the assembly of the rigid drive assembly which includes the input shaft 10, the two longitudinal shafts 20 and 21, the tube 22, the plates 23 and 24 and the cam mechanism 13 to 17 which appears once mounted in the upper part of figure 2. We note that this drive assembly is provided with a cover 33 which protects the cam mechanism while a sleeve 34 surrounds the shaft 10 being fixed on the cover 33. Thus, the assembly drive is a rigid and robust device that can be manipulated, for example by means of a hoist, in order to be place on the structure, represented by beams 5 and 6, fitted with modules, after the baskets have been put in place 31.

Selon un aspect avantageux de l'invention, l'assemblage de l'ensemble d'entraínement sur les poutres 5 et 6 est réalisé de façon amovible, de sorte que, lors d'une opération de maintenance, il est possible de séparer l'ensemble d'entraínement du reste de la structure du dispositif de formation de la foule afin d'intervenir, sur les modules en retirant les paniers 31.According to an advantageous aspect of the invention, the assembly of the drive unit on the beams 5 and 6 is made of removably, so that during a maintenance operation, it is possible to separate the drive assembly from rest of the structure of the crowd training device in order to intervene, on the modules by removing the baskets 31.

Au vu de la figure 2 en particulier, on comprend que l'ensemble d'entraínement formé par les arbres 20 et 21, le tube 22, les platines 24 et 25 et l'arbre d'entrée 10, le capot 33 et le manchon 34 peut être monté sur les poutres 5 et 6 dans deux positions correspondant respectivement au positionnement de l'arbre d'entrée 10 d'un côté ou de l'autre du dispositif. Ceci permet donc d'adapter un dispositif de formation de la foule conforme à l'invention aux souhaits du client, y compris lorsque celui-ci doit être satisfait dans les plus brefs délais. Il suffit en effet de conserver, dans le stock du fabricant de dispositifs de formation de la foule, un nombre adéquat d'ensembles d'entraínement et un nombre adéquat de structures de dispositif de formation de la foule.In view of Figure 2 in particular, we understand that the drive assembly formed by the shafts 20 and 21, the tube 22, the plates 24 and 25 and the input shaft 10, the cover 33 and the sleeve 34 can be mounted on the beams 5 and 6 in two positions corresponding respectively to the positioning of the input shaft 10 on one side or the other of the device. This therefore makes it possible to adapt a device for training the crowd according to the invention to the wishes of the customer, including when this must be satisfied as soon as possible deadlines. It suffices to keep in the stock of manufacturer of crowd training devices, a number adequate training sets and an adequate number of crowd training device structures.

On note YY' l'axe médian des platines 23 et 24. Comme il apparaít à la figure 2, cet axe est décalé par rapport à l'axe XX' commun aux arbres 20 et 21 et au tube 22. Ceci correspond à une construction plus rationnelle de l'ensemble d'entraínement dans lequel l'inclinaison des bielles 30 est limitée alors que les efforts sur les leviers 7 et 8 sont maintenus à un niveau faible. On peut en particulier régler l'obliquité de la foule au moyen des lumières arquées 28a et 29a. La construction non symétrique des platines 23 et 24 permet en outre de limiter les dimensions des lumières arquées 28a et 29a. We denote YY 'the middle axis of the plates 23 and 24. As it appears in Figure 2, this axis is offset from the axis XX' common to the shafts 20 and 21 and the tube 22. This corresponds to a construction more rational of the drive assembly in which the inclination of the rods 30 is limited while the forces on the levers 7 and 8 are kept at a low level. One can in particular adjust the obliquity of the crowd by means of the arched lights 28 a and 29 a . The non-symmetrical construction of the plates 23 and 24 also makes it possible to limit the dimensions of the arcuate openings 28 a and 29 a .

Cependant, selon une variante non représentée de l'invention, on peut prévoir que les platines 23 et 24 sont symétriques, c'est-à-dire que l'axe XX' est sécant avec l'axe médian YY' de ces platines, de sorte qu'un même ensemble d'entraínement peut être indifféremment monté avec l'arbre d'entrée orienté d'un côté ou de l'autre du dispositif de formation de la foule. Ce dispositif est aussi capable de réaliser une foule oblique, même si les contraintes mécaniques sont plus importantes que dans le cas où les platines sont asymétriques.However, according to a variant not shown of the invention, we can predict that the plates 23 and 24 are symmetrical, that is to say that the axis XX 'is intersecting with the median axis YY 'of these plates, so that the same set of drive can be mounted with the input shaft oriented on one side or the other of the device for forming the crowd. This device is also capable of performing a crowd oblique, even if the mechanical stresses are greater than in the case where the plates are asymmetrical.

Selon un aspect avantageux de l'invention, la structure rigide formée essentiellement par le tube 22 et les platines 23 et 24 permet de soutenir l'arbre 10 en porte-à-faux, ce qui évite de prévoir une patte de reprise d'effort sur les poutres 5 et 6 pour le support de l'arbre 10. La structure inférieure du dispositif de l'invention est ainsi simplifiée.According to an advantageous aspect of the invention, the structure rigid formed essentially by the tube 22 and the plates 23 and 24 supports the shaft 10 overhanging, which avoids providing a force recovery leg on the beams 5 and 6 for the support of the shaft 10. The lower structure of the device of the invention is thus simplified.

Claims (10)

Dispositif de formation de la foule pour métier à tisser du type Jacquard dans lequel l'actionnement vertical alternatif de deux séries de couteaux (1, 1') est opéré à partir d'un arbre d'entrée (10) animé d'un mouvement de rotation continu, caractérisé en ce qu'il comprend deux arbres longitudinaux (20, 21) disposés co-axialement à l'intérieur d'un tube rigide (22) solidaire de deux platines (23, 24) de support desdits arbres et d'un mécanisme à cames (13-17) transmettant un mouvement de rotation alternatif dudit arbre d'entrée auxdits arbres longitudinaux.Crowd training device for loom weave of the Jacquard type in which the vertical actuation alternative of two series of knives (1, 1 ') is operated at from an input shaft (10) animated by a movement of continuous rotation, characterized in that it comprises two shafts longitudinal (20, 21) arranged co-axially inside a rigid tube (22) integral with two plates (23, 24) of support of said shafts and of a cam mechanism (13-17) transmitting an alternating rotational movement of said shaft of entry to said longitudinal trees. Dispositif de formation de la foule selon la revendication 1, caractérisé en ce que lesdites platines (23, 24) sont montées de façon amovible sur une structure (5, 6) dudit dispositif.Crowd-forming device according to claim 1, characterized in that said plates (23, 24) are removably mounted on a structure (5, 6) of said device. Dispositif de formation de la foule selon la revendication 2, caractérisé en ce que lesdites platines (23, 24) sont aptes à être montées sur ladite structure (5, 6) dans deux positions correspondant respectivement au positionnement dudit arbre d'entrée (10) d'un côté ou de l'autre dudit dispositif.Crowd-forming device according to claim 2, characterized in that said plates (23, 24) are suitable for being mounted on said structure (5, 6) in two positions corresponding respectively to the positioning of said input shaft (10) on either side of said device. Dispositif de formation de la foule selon l'une des revendications précédentes, caractérisé en ce que lesdites platines (23, 24) sont asymétriques, c'est-à-dire que l'axe (XX') commun audits arbres longitudinaux (20, 21) est décalé par rapport à l'axe médian (YY') desdites platines.Crowd-forming device according to one of previous claims, characterized in that said plates (23, 24) are asymmetrical, that is to say that the axis (XX ') common to the longitudinal shafts (20, 21) is offset relative to the median axis (YY ') of said plates. Dispositif de formation de la foule selon l'une des revendications 1 à 3, caractérisé en ce que lesdites platines sont symétriques, c'est-à-dire que l'axe commun auxdits arbres longitudinaux est sécant avec l'axe médian desdites platines.Crowd-forming device according to one of Claims 1 to 3, characterized in that said plates are symmetrical, that is to say that the axis common to said trees longitudinal is intersecting with the median axis of said plates. Dispositif de formation de la foule selon l'une des revendications précédentes comprenant des modules électromagnétiques de sélection des crochets en appui sur lesdits couteaux, caractérisé en ce que lesdits modules (31') sont répartis dans des paniers (31) aptes à être mis en place dans ledit dispositif une fois lesdits modules en place dans lesdits paniers.Crowd-forming device according to one of previous claims comprising electromagnetic modules selection of the hooks resting on said knives, characterized in that said modules (31 ') are distributed in baskets (31) capable of being placed in said device once said modules in place in said baskets. Procédé de montage d'un dispositif de formation de la foule, caractérisé en ce qu'il consiste à pré-monter, d'une part, une structure (5, 6) équipée de modules de sélection (31') et, d'autre part, un ensemble d'entraínement rigide comprenant deux arbres longitudinaux (20, 21) disposés co-axialement à l'intérieur d'un tube rigide (22) solidaire de deux platines (23, 24) et un mécanisme à cames (13-17) et à monter ledit ensemble d'entraínement sur ladite structure équipée de modules.Method for mounting a device for forming the crowd, characterized in that it consists of pre-mounting, of a part, a structure (5, 6) equipped with selection modules (31 ') and, on the other hand, a rigid drive assembly comprising two longitudinal shafts (20, 21) arranged co-axially inside a rigid tube (22) integral with two plates (23, 24) and a cam mechanism (13-17) and mount said drive assembly on said structure equipped with modules. Procédé de montage selon la revendication 7, caractérisé en ce qu'il consiste à équiper ladite structure en modules (31') répartis en paniers (31) pré-montés.Mounting method according to claim 7, characterized in that it consists in equipping said structure with modules (31 ') distributed in baskets (31) pre-assembled. Procédé de montage selon la revendication 7, caractérisé en ce que le montage dudit ensemble d'entraínement (13-17, 20-24) sur ladite structure (5, 6) équipée de modules (31') est réalisé de façon amovible.Mounting method according to claim 7, characterized in that the mounting of said drive assembly (13-17, 20-24) on said structure (5, 6) equipped with modules (31 ') is removably. Métier à tisser de type Jacquard équipé d'un dispositif de formation de la foule selon l'une des revendications 1 à 6 ou monté selon l'une des revendications 7 à 9.Jacquard type loom equipped with a device crowd formation according to one of claims 1 to 6 or mounted according to one of claims 7 to 9.
EP97420236A 1996-12-19 1997-12-17 Shedding mechanism, method of assembly thereof and Jacuard loom with such a mechanism Expired - Lifetime EP0849384B1 (en)

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FR9616004A FR2757544B1 (en) 1996-12-19 1996-12-19 CROWD FORMING DEVICE, MOUNTING METHOD AND JACQUARD TYPE WEAVING EQUIPMENT PROVIDED WITH SUCH A DEVICE
FR9616004 1996-12-19

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EP (1) EP0849384B1 (en)
JP (1) JP3429172B2 (en)
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Publication number Priority date Publication date Assignee Title
FR2802219A1 (en) * 1999-12-14 2001-06-15 Staubli Sa Ets Device moving laths in Jacquard loom has single input shaft driving two superposed parallel drive shafts fitted with rocker arms connected to laths
EP1167598A1 (en) 2000-06-16 2002-01-02 NV Michel van de Wiele Device for guiding the knife-supporting beams in a jacquard machine
BE1013564A3 (en) * 2000-06-16 2002-04-02 Wiele Michel Van De Nv DEVICE FOR KNIVES beams OF THE LEGAL GUIDE IN A Jacquard machine.
US6463962B2 (en) 2000-06-16 2002-10-15 N.V. Michel Van De Wiele Device for guiding the knife-supporting beams in a jacquard machine

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DE69701616D1 (en) 2000-05-11
ES2144302T3 (en) 2000-06-01
JP3429172B2 (en) 2003-07-22
US5927347A (en) 1999-07-27
DE69701616T2 (en) 2000-07-27
CN1185496A (en) 1998-06-24
EP0849384B1 (en) 2000-04-05
FR2757544B1 (en) 1999-03-05
JPH10237737A (en) 1998-09-08
FR2757544A1 (en) 1998-06-26
CN1061109C (en) 2001-01-24

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