EP1399609B1 - Shedding device on a jacquard-type weaving machine - Google Patents

Shedding device on a jacquard-type weaving machine Download PDF

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Publication number
EP1399609B1
EP1399609B1 EP02767535A EP02767535A EP1399609B1 EP 1399609 B1 EP1399609 B1 EP 1399609B1 EP 02767535 A EP02767535 A EP 02767535A EP 02767535 A EP02767535 A EP 02767535A EP 1399609 B1 EP1399609 B1 EP 1399609B1
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EP
European Patent Office
Prior art keywords
racks
actuator
actuators
pinions
rack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02767535A
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German (de)
French (fr)
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EP1399609A1 (en
Inventor
Dario Bassi
Damien Bouchet
Guillaume Boutte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Staeubli Lyon SA
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Staeubli Lyon SA
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Publication date
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Publication of EP1399609A1 publication Critical patent/EP1399609A1/en
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Publication of EP1399609B1 publication Critical patent/EP1399609B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/20—Electrically-operated jacquards
    • D03C3/205—Independently actuated lifting cords
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/20—Electrically-operated jacquards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D03C3/32—Jacquard driving mechanisms
    • 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 invention relates to a shedding device for a jacquard loom.
  • Jacquard type armor mechanics it is known to drive, in phase opposition, two frames each carrying a multiplicity of horizontal claws or knives able to vertically move the hooks connected to the arches by a pulley or muffle mechanism. .
  • the aim of the invention is to propose an alternative solution to those known from the state of the art which makes it possible to control a large number of warp threads, in a small space requirement and with a number of actuators which can be lower than that of known systems, which is advantageous in terms of cost and reliability.
  • the invention relates to a shedding device on a jacquard loom comprising at least one electric rotary actuator.
  • This device is characterized in that this actuator is adapted to drive in rotation at least one pinion engaged with a rack connected by a force transmission element to at least one rail.
  • the rack / pinion connection makes it possible to transform the rotational movement of the output shaft of the actuator into a movement of oscillations used to move a bar relative to the picks.
  • the actuator is able to rotate a plurality of pinions associated with racks distributed in the longitudinal direction of an output shaft of the actuator.
  • This allows to control a relatively large number of smooth thanks to a single actuator, resulting in significant space savings for the equipment of a conventional loom may include more than 10,000 warp son.
  • the distance of the racks in the direction of the output shaft of the actuator and / or the number of these racks driven by this actuator can be adjustable, which allows to adapt the geometric distribution of the rails and / or their number to the desired armor.
  • the drive gears of the racks can be adapted to slide with reduced clearance in the longitudinal direction of the shaft or trees, the shafts and pinions having complementary profiles, grooved or equivalent, which allows them to rotate together.
  • means for synchronizing the racks engaged with the driven gears with the same actuator comprise an elastic member adapted to limit the travel of the rack to a position beyond which its toothing would be disengaged from that of the associated pinion, so that, with sufficient rotation of the output shaft of the actuator, the racks are aligned with each other.
  • This elastic element makes it possible to stop the movement of the rack at its top dead center and / or its bottom dead center, by exerting on it a catch-up force between the teeth of the rack and the toothing of the rack. while the pinion tends to push the rack beyond the top dead and bottom dead position, the set of gear teeth may escape relative to each other. This allows to align quickly and accurately the different racks driven by the same actuator.
  • This elastic element may be provided with an end adapted to bear against at least one stop formed on the rack. In this case, it can be provided that the rack is provided with a longitudinal groove for receiving and sliding the second end of the tongue.
  • the force transmission element may be a semi-rigid rod, which allows a positive control of the associated smooth or slats.
  • this ring can slide in a guide sheath, which allows to distribute the rails driven by the same output shaft according to the weave pattern to be made, without strict limitation on the inclination angles of the chain of kinematic control of the rails.
  • the ring is advantageously made of synthetic material based on carbon-epoxy.
  • the force transmission element can be a flexible funicular element, arcade type. This allows to control each arm to the rise, a return spring being associated with each arm to exert on it a force directed downwards.
  • the device which comprises electric rotary actuators arranged in rows and columns above the loom, is characterized in that these actuators are arranged in such a way that their respective output shafts are generally parallel to one another, preferably generally parallel to the direction of the weft threads of the loom, and in that each output shaft is capable of driving a plurality of pinions each engaged with a rack kinematically connected to at least one control rail of a warp thread.
  • This aspect of the invention allows to control a large number of warp son in a small footprint and with a number of actuators can be lower than that of known systems, which is advantageous in terms of cost and reliability.
  • the arrangement of the output shafts of the electric rotary actuators makes it possible to juxtapose drive gears in the direction of the geometric axis of these shafts. It is thus possible effectively to control several smooth on the width of the loom, with the same actuator, which avoids to multiply the actuators.
  • the pinions can be positioned along the shafts so that the force transmission elements have the least curved or angular paths possible. Thus, the transmission of effort is more direct.
  • the invention also relates to a loom equipped with a device for forming the crowd such that previously described. This job is easier to implement and maintain than the trades of the prior art.
  • the electric rotary actuator 1 shown in FIG. figure 1 is a servomotor provided with a splined output shaft 11 which XX 'is noted the longitudinal geometric axis. This axis is parallel to the direction D of the weft son of the loom.
  • actuators 1 'of the same type which are represented in phantom to the figure 1 and whose unrepresented output shafts are parallel to the shaft 11.
  • each module 2 On the shaft 11 are mounted several identical modules 2 which each comprise a pinion 21 disposed around the shaft 11 and provided with a central opening allowing it to cooperate with the splines of this shaft to be rotated around the shaft.
  • the modules 2 can slide with reduced clearance on the corresponding shaft 11.
  • Each module 2 also comprises a rectilinear rack 22 and generally parallel to an axis Z-Z 'inclined relative to the horizontal in the normal configuration of use of the trade M.
  • Each module 2 also comprises a unitary housing 23 in which the pinion 21 is rotatably mounted, while the rack 22 is slidable; in its longitudinal direction, in a groove 43, formed between a module 2 and a neighboring module 2 'and closed by a finishing plate 44.
  • each rack 22 is integral with the upper end 24 has a ring 24 in carbon-epoxy.
  • the elements 22 and 24 may be glued or welded together, or fixed by any other suitable means.
  • the rod 24 is a semi-rigid element whose lower end 24b is fixed to a smooth 3 provided with an eyelet 31 for the passage of a warp thread 4.
  • the ring 24 is able to exert, on the associated arm 3, a pulling force F 1 upwards, and a force F ' 1 pushing downwards, so that the arm 3 is positively controlled by the rod 24 without the need to use a return spring.
  • the ring 24 can be made of other materials compatible with its function. It may, for example, be made of reinforced plastic, steel or glass fibers.
  • the trade M represented at figure 5 comprises a beam 101 and a coil 102 between which the warp threads 4 of the loom circulate.
  • D denotes the direction of the picks on the trade M, that is to say the direction of the weft son.
  • the loom M also comprises a frame 104 supporting the elements 101 and 102 and a not shown system for passing the picks.
  • the frame 104 is extended by a superstructure 105 disposed above the main part of the loom M and supporting a shedding device 110 and the hole plate 5.
  • This device is divided into two blocks 110A and 110B independently mounted on the superstructure 105.
  • Block 110A is partially represented at figure 6 . It comprises two plates 111 and 112 between which is defined a volume V. On each plate 111 or 112 are mounted electric rotary actuators 1 whose output shafts 11 extend, through the plate 111 or 112, in the volume V For the sake of clarity, only a part of the trees 11 appears at the figure 6 .
  • the plates 111 and 112 and the actuators 1 are arranged in the superstructure 105, so that the 11, which are parallel to each other, are also generally parallel to the direction D of the picks.
  • the actuators 1 are arranged in rows and columns on the plates 111 and 112.
  • the plate 111 supports six rows of eight actuators 1 which form eight columns.
  • the plate 112 carries five rows of actuators also forming eight columns.
  • the axis XX ' is parallel to the direction D and perpendicular to an axis YY' along which the rows R 1 to R 5 extend and to an axis ZZ 'along which the columns C 1 to C 5 and C extend. ' 1 to C' 5 .
  • sheaths 25 are shown between the blocks 110A and 110B, on the one hand, and the vicinity of the passage zone of the picks, on the other hand. This is to simplify the drawing. In practice, many sheaths 25 are used instead of a conventional harness and Jacquard loom.
  • the various modules 2 intended to cooperate with the shafts 11 of the actuators 1 of the row R 1 are integrated in a subassembly 40 represented in perspective partially exploded at the figure 4 .
  • This subassembly 40 extends generally in a direction parallel to the axis YY 'and comprises eight modules 20. It is formed by a monoblock housing 41 of plastic material constituting several unitary housings 23 and in which are formed housing 42 of receiving the pinions 21 and grooves 43 for sliding the racks 22.
  • the plate closure 44 of the subassembly 40 is shown removed at figure 4 . It is provided respectively in the housing 41 and in the plate 44 of the openings 45 and 46 for the passage of the shafts 11.
  • the eight modules 20 intended to be driven by the actuators of the row R 1 can be placed on the corresponding shafts 11, in a grouped manner, by manipulating the subassembly 40. Their positioning along the axis XX These different shafts can also be adjusted in a grouped manner, which represents a significant time saving during the construction of the device 10.
  • Each ring 24 is disposed within a guide sheath 25 which extends between an apertured plate 5 and a comber board 6 provided with openings 5 and 6 respectively have a receiving and locking the upper ends 25a and lower 25 b of the sheaths 25.
  • the geometry of ducts 25 between the plate 5 and the plate 6 is variable and adapted to the desired weave.
  • the distance d between two lower ends 25 b of tube 25, at the board 6 is not necessarily equal to the distance d 'between upper ends 25 to sheath 25, the level of the board 5, this distance d 'being, for its part, substantially equal to the deviation e between the modules 2 of the shaft 11.
  • the sheaths 25 corresponding to rods controlled by the same shaft 11 are preferably, but not necessarily, aligned at the level of the board 6, as is apparent from the figure 1 .
  • the ends 25 a and 25 b of the sheaths 25 are immobilized in the vicinity of the openings 5a and 6a, the duct 25 may protrude above the plate 5 and below the plate 6.
  • a housing 23 has a first receiving end 26 has a resilient tongue 26, the second end 26 b is free relative to the housing 23.
  • This end 26 b is intended to be engaged in a longitudinal groove 22 b of a rack 22 of a neighboring module 2.
  • the groove 22b extends on the side of the rack 22 opposite to its toothing 22c .
  • the end 26b of the tongue 26 can slide in the groove 22b .
  • the tongue 26 can bear against a stop 22 d provided in the lower part of the groove 22 b , as shown on the left side of the figure 2 .
  • the rack 22 is in the top dead center position, as is the rod 24 and the associated arm 3.
  • the tab 26 opposes an additional upward movement of the rack 22 and the toothing 21c of the pinion 21 escapes relative to the toothing 22c , the tab 26 having a tendency to permanently bring the toothing 22c into engagement with the toothing 21c .
  • This construction makes it possible to adjust in one go the high dead points of the various racks 22 driven by the same actuator 1, insofar as it suffices to rotate the corresponding shaft 11 until all the teeth 22 c of the racks come escape the teeth 21 c gables, while the racks are in abutment against the associated elastic tabs.
  • this tongue could be provided to cooperate with a stop not shown formed in the vicinity of the upper portion of the groove 22b , allowing the adjustment of the bottom dead center of the race of the racks.
  • the modules 52 comprise pinions 71 associated with racks 72 connected to arches 74 for controlling heddles 53.
  • arches 74 can exert an effort F 1 upward traction on the rails 53, while the return springs 77 can exert on these smooth a downward force.
  • the springs 77 can allow synchronization of the different racks driven by the same shaft 61, playing a role similar to that of the tabs of the first embodiment.
  • This second embodiment has the particular advantage of being usable with a conventional Jacquard harness, a known ploy board and a plow plate.
  • each force transmission element 24 or 74 connected to a single rail 3 or 53. However, it is possible to order several healds with such an element.
  • the invention has been represented with the shafts 11 and 61 of the actuators 1 generally parallel to the direction D of the weft threads. This is not mandatory because it is possible to use the flexible nature of the force transmission means 24 and 74.
  • an output shaft any shaft driven by an actuator, whether it is in direct contact with it or through a reducer.
  • the output shaft may be aligned or non-aligned with the geometric axis of the rotating portion of the actuator, the optional reducer may act as a bevel gear.
  • the invention has been shown with pinions reported on the output shafts of the actuators. It also applies with an actuator provided with an output shaft whose cross section is such that it can mesh directly with one or more racks, this shaft thus constituting itself one or more gears within the meaning of the present invention. . In other words, in the case where such a shaft meshes with several racks, it forms a succession of gears contiguous to each other.
  • the invention has been shown with actuators arranged above the rails and the crowd. However, it applies in the case where the actuators are placed below the rails and the crowd, which facilitates access to the crowd and reduces clutter.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Woven Fabrics (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Massaging Devices (AREA)
  • Rehabilitation Tools (AREA)

Abstract

The invention relates to a shedding device comprising at least one electric rotary actuator having an output shaft ( 11 ) that is designed to rotate a pinion ( 21 ) which is engaged with a rack ( 22 ), said rack being connected to a control heald ( 3 ) of a warp end ( 4 ) by means of a load transfer element ( 24 ).

Description

L'invention a trait à un dispositif de formation de la foule pour un métier à tisser de type Jacquard.The invention relates to a shedding device for a jacquard loom.

Dans les mécaniques d'armures de type Jacquard, il est connu d'entraîner, en opposition de phase, deux cadres portant chacun une multiplicité de griffes ou couteaux horizontaux aptes à déplacer verticalement les crochets reliés aux arcades par un mécanisme à poulies ou à moufles.In Jacquard type armor mechanics, it is known to drive, in phase opposition, two frames each carrying a multiplicity of horizontal claws or knives able to vertically move the hooks connected to the arches by a pulley or muffle mechanism. .

Il est également connu, par exemple de EP-A-0 933 456 , d'utiliser une poulie commandée par un actionneur rotatif électrique pour enrouler plus ou moins un élément funiculaire afin de déplacer alternativement les lisses d'un métier Jacquard. Cet état de la technique fonctionne de façon satisfaisante mais induit l'utilisation d'un grand nombre d'actionneurs électriques dans la mesure où les lisses sont commandées individuellement ou en petit nombre par chaque actionneur. Dans le cas où quelques lisses sont commandées par un même actionneur, l'angle d'inclinaison relatif des arcades reliées à ces lisses doit être relativement faible afin de limiter les efforts de frottement, ce qui impose le positionnement des actionneurs et peut, dans certaines configurations, conduire à un encombrement important du dispositif. Une mécanique d'armure utilisant ce type de dispositif est connue de EP-A-1 069 218 .It is also known, for example from EP-A-0 933 456 , to use a pulley controlled by an electric rotary actuator for winding more or less a funicular element in order to move alternately the rails of a Jacquard loom. This state of the art works satisfactorily but induces the use of a large number of electric actuators insofar as the rails are controlled individually or in small numbers by each actuator. In the case where some smooth are controlled by the same actuator, the relative angle of inclination of the arches connected to these smooth must be relatively small in order to limit the friction forces, which requires the positioning of the actuators and may, in some configurations, lead to a large size of the device. An armor mechanic using this type of device is known to EP-A-1,069,218 .

L'invention vise à proposer une solution alternative à celles connues de l'état de la technique qui permet de commander un grand nombre de fils de chaîne, dans un encombrement réduit et avec un nombre d'actionneurs pouvant être inférieur à celui des systèmes connus, ce qui est avantageux en terme de coût et de fiabilité.The aim of the invention is to propose an alternative solution to those known from the state of the art which makes it possible to control a large number of warp threads, in a small space requirement and with a number of actuators which can be lower than that of known systems, which is advantageous in terms of cost and reliability.

Dans cet esprit, l'invention concerne un dispositif de formation de la foule sur un métier à tisser de type Jacquard comprenant au moins un actionneur rotatif électrique. Ce dispositif est caractérisé en ce que cet actionneur est apte à entraîner en rotation au moins un pignon en prise avec une crémaillère reliée, par un élément de transmission d'effort, à au moins une lisse.In this spirit, the invention relates to a shedding device on a jacquard loom comprising at least one electric rotary actuator. This device is characterized in that this actuator is adapted to drive in rotation at least one pinion engaged with a rack connected by a force transmission element to at least one rail.

Grâce à l'invention, la liaison pignon/crémaillère permet de transformer le mouvement de rotation de l'arbre de sortie de l'actionneur en un mouvement d'oscillations utilisé pour déplacer une lisse par rapport aux duites.Thanks to the invention, the rack / pinion connection makes it possible to transform the rotational movement of the output shaft of the actuator into a movement of oscillations used to move a bar relative to the picks.

Selon un premier aspect avantageux, l'actionneur est apte à entraîner en rotation plusieurs pignons associés à des crémaillères réparties selon la direction longitudinale d'un arbre de sortie de l'actionneur. Ceci permet de commander un nombre de lisses relativement important grâce à un unique actionneur, d'où un gain de place significatif pour l'équipement d'un métier à tisser classique pouvant comprendre plus de 10 000 fils de chaîne. Dans ce cas, l'écart des crémaillères selon la direction de l'arbre de sortie de l'actionneur et/ou le nombre de ces crémaillères entraînées par cet actionneur peut être réglable, ce qui permet d'adapter la répartition géométrique des lisses et/ou leur nombre aux armures recherchées. En outre, les pignons d'entraînement des crémaillères peuvent être aptes à coulisser à jeu réduit selon la direction longitudinale du ou des arbres, les arbres et les pignons ayant des profils complémentaires, cannelés ou équivalents, ce qui permet leur solidarisation en rotation.According to a first advantageous aspect, the actuator is able to rotate a plurality of pinions associated with racks distributed in the longitudinal direction of an output shaft of the actuator. This allows to control a relatively large number of smooth thanks to a single actuator, resulting in significant space savings for the equipment of a conventional loom may include more than 10,000 warp son. In this case, the distance of the racks in the direction of the output shaft of the actuator and / or the number of these racks driven by this actuator can be adjustable, which allows to adapt the geometric distribution of the rails and / or their number to the desired armor. In addition, the drive gears of the racks can be adapted to slide with reduced clearance in the longitudinal direction of the shaft or trees, the shafts and pinions having complementary profiles, grooved or equivalent, which allows them to rotate together.

Selon un autre aspect avantageux de l'invention, des moyens de synchronisation des crémaillères en prise avec les pignons entraînés avec un même actionneur comprennent un élément élastique apte à limiter la course de la crémaillère à une position au-delà de laquelle sa denture serait débrayée de celle du pignon associé, de telle sorte que, moyennant une rotation suffisante de l'arbre de sortie de l'actionneur, les crémaillères sont alignées les unes par rapport aux autres. Cet élément élastique permet d'arrêter le mouvement de la crémaillère au niveau de son point mort haut et/ou de son point mort bas, en exerçant sur celle-ci un effort de rattrapage de jeu entre la denture de la crémaillère et la denture du pignon alors que, si le pignon a tendance à pousser la crémaillère au-delà de la position de point mort haut et de point mort bas, les dentures en prise peuvent échapper l'une par rapport à l'autre. Ceci permet d'aligner de façon rapide et précise les différentes crémaillères entraînées par un même actionneur. Cet élément élastique peut être pourvu d'une extrémité apte à venir en appui contre au moins une butée formée sur la crémaillère. Dans ce cas, on peut prévoir que la crémaillère est pourvue d'une rainure longitudinale de réception et de coulissement de la seconde extrémité de la languette.According to another advantageous aspect of the invention, means for synchronizing the racks engaged with the driven gears with the same actuator comprise an elastic member adapted to limit the travel of the rack to a position beyond which its toothing would be disengaged from that of the associated pinion, so that, with sufficient rotation of the output shaft of the actuator, the racks are aligned with each other. This elastic element makes it possible to stop the movement of the rack at its top dead center and / or its bottom dead center, by exerting on it a catch-up force between the teeth of the rack and the toothing of the rack. while the pinion tends to push the rack beyond the top dead and bottom dead position, the set of gear teeth may escape relative to each other. This allows to align quickly and accurately the different racks driven by the same actuator. This elastic element may be provided with an end adapted to bear against at least one stop formed on the rack. In this case, it can be provided that the rack is provided with a longitudinal groove for receiving and sliding the second end of the tongue.

Selon un premier mode de réalisation avantageux de l'invention, l'élément de transmission d'effort peut être un jonc semi-rigide, ce qui permet une commande positive de la ou des lisses associées. Dans ce cas, ce jonc peut coulisser dans une gaine de guidage, ce qui permet de répartir les lisses entraînées par un même arbre de sortie selon le motif d'armure à réaliser, sans limitation stricte sur les angles d'inclinaison de la chaîne de commande cinématique des lisses. Le jonc est avantageusement réalisé en matière synthétique à base de carbone-époxy.According to a first advantageous embodiment of the invention, the force transmission element may be a semi-rigid rod, which allows a positive control of the associated smooth or slats. In this case, this ring can slide in a guide sheath, which allows to distribute the rails driven by the same output shaft according to the weave pattern to be made, without strict limitation on the inclination angles of the chain of kinematic control of the rails. The ring is advantageously made of synthetic material based on carbon-epoxy.

Selon un autre mode de réalisation avantageux de l'invention, l'élément de transmission d'effort peut être un élément funiculaire souple, de type arcade. Ceci permet de commander chaque lisse à la montée, un ressort de rappel étant associé à chaque lisse pour exercer sur celle-ci un effort dirigé vers le bas.According to another advantageous embodiment of the invention, the force transmission element can be a flexible funicular element, arcade type. this allows to control each arm to the rise, a return spring being associated with each arm to exert on it a force directed downwards.

Selon un autre aspect avantageux de l'invention, le dispositif, qui comprend des actionneurs rotatifs électriques ordonnés en rangées et en colonnes au-dessus du métier, est caractérisé en ce que ces actionneurs sont disposés de telle sorte que leurs arbres de sortie respectifs sont globalement parallèles entre eux, de préférence globalement parallèles à la direction des fils de trame du métier, et en ce que chaque arbre de sortie est apte à entraîner plusieurs pignons en prise chacun avec une crémaillère cinématiquement liée à au moins une lisse de commande d'un fil de chaîne. Cet aspect de l'invention permet de commander un grand nombre de fils de chaîne dans un encombrement réduit et avec un nombre d'actionneurs pouvant être inférieur à celui des systèmes connus, ce qui est avantageux en terme de coût et de fiabilité. La disposition des arbres de sortie des actionneurs rotatifs électriques permet de juxtaposer des pignons d'entraînement selon la direction de l'axe géométrique de ces arbres. On peut ainsi commander efficacement plusieurs lisses sur la largeur du métier, avec un même actionneur, ce qui évite de multiplier les actionneurs. Les pignons peuvent être positionnés le long des arbres de telle sorte que les éléments de transmission d'effort aient des trajectoires les moins courbes ou anguleuses possible. Ainsi, la transmission d'effort est plus directe.According to another advantageous aspect of the invention, the device, which comprises electric rotary actuators arranged in rows and columns above the loom, is characterized in that these actuators are arranged in such a way that their respective output shafts are generally parallel to one another, preferably generally parallel to the direction of the weft threads of the loom, and in that each output shaft is capable of driving a plurality of pinions each engaged with a rack kinematically connected to at least one control rail of a warp thread. This aspect of the invention allows to control a large number of warp son in a small footprint and with a number of actuators can be lower than that of known systems, which is advantageous in terms of cost and reliability. The arrangement of the output shafts of the electric rotary actuators makes it possible to juxtapose drive gears in the direction of the geometric axis of these shafts. It is thus possible effectively to control several smooth on the width of the loom, with the same actuator, which avoids to multiply the actuators. The pinions can be positioned along the shafts so that the force transmission elements have the least curved or angular paths possible. Thus, the transmission of effort is more direct.

On peut, en outre, prévoir que :

  • Les actionneurs sont répartis sur des platines immobilisées par rapport à la superstructure du métier et disposées de façon globalement parallèle aux fils de chaîne. Dans ce cas, les actionneurs sont avantageusement répartis en deux groupes supportés chacun par une platine, les arbres de sortie des actionneurs s'étendant, pour l'essentiel, dans un volume défini entre ces platines. Cette construction est particulièrement compacte et permet d'implanter les arbres des actionneurs avec une grande densité sans que les dimensions transversales des actionneurs ne créent une gêne à ce niveau.
  • Plusieurs pignons entraînés par des arbres parallèles et distincts du dispositif sont intégrés, avec les crémaillères correspondantes, dans un sous-ensemble s'étendant globalement selon une direction perpendiculaire à ces arbres. Un tel sous-ensemble permet de manipuler en une fois plusieurs couples de pignons et de crémaillères, ce qui facilite les opérations de montage et de maintenance du dispositif et permet un positionnement précis des éléments de la chaîne cinématique. Un tel sous-ensemble comprend avantageusement des pignons et des crémaillères en nombre correspondant au nombre d'actionneurs d'une rangée d'actionneurs. On peut prévoir que chaque sous-ensemble comprend un boîtier commun pourvu d'ouvertures de passage des arbres et de logements de réception des pignons et des crémaillères.
  • Une plaque à trous est immobilisée par rapport à la superstructure du métier, à proximité des actionneurs, alors qu'une planche d'empoutage est disposée à proximité des lisses, tandis que les éléments de transmission d'effort entre les crémaillères et les lisses associées suivent chacun un trajet défini par des ouvertures ménagées respectivement dans cette plaque et dans cette planche. Dans ce cas, les éléments de transmission d'effort sont avantageusement des joncs semi-rigides aptes à coulisser dans des gaines dont les extrémités sont respectivement immobilisées dans ou à proximité des ouvertures précitées.
In addition, it can be expected that:
  • The actuators are distributed on fixed plates relative to the superstructure of the loom and disposed generally parallel to the warp son. In this case, the actuators are advantageously divided into two groups each supported by a plate, the actuator output shafts extending, essentially, in a volume defined between these plates. This construction is particularly compact and allows to implement the actuator shafts with a high density without the transverse dimensions of the actuators create discomfort at this level.
  • Several gears driven by parallel and distinct shafts of the device are integrated, with the corresponding racks, in a subset extending generally in a direction perpendicular to these shafts. Such a subassembly makes it possible to manipulate at one time several pairs of pinions and racks, which facilitates assembly and maintenance operations of the device and allows precise positioning of the elements of the drive train. Such a subassembly advantageously comprises pinions and racks in number corresponding to the number of actuators of a row of actuators. It can be provided that each subassembly comprises a common housing provided with openings for the passage of the shafts and housing receiving the pinions and racks.
  • A perforated plate is immobilized with respect to the superstructure of the loom, close to the actuators, while a plow board is arranged near the rails, while the elements of force transmission between the racks and the associated rails each follow a path defined by openings formed respectively in this plate and in this board. In this case, the force transmission elements are advantageously semi-rigid rods capable of sliding in sheaths whose ends are respectively immobilized in or near the aforementioned openings.

L'invention concerne également un métier à tisser équipé d'un dispositif de formation de la foule tel que précédemment décrit. Ce métier est plus simple à mettre en oeuvre et à entretenir que les métiers de l'art antérieur.The invention also relates to a loom equipped with a device for forming the crowd such that previously described. This job is easier to implement and maintain than the trades of the prior art.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre de deux modes de réalisation d'un dispositif de formation de la foule et d'un métier conformes 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 de principe d'une partie d'un dispositif de formation de la foule conforme à un premier mode de réalisation de l'invention ;
  • la figure 2 est une coupe de principe selon la ligne II-II à la figure 1 ;
  • la figure 3 est une vue en perspective éclatée d'un module du dispositif des figures 1 et 2
  • la figure 4 est une vue en perspective d'une partie du dispositif des figures 1 et 2 incorporant plusieurs modules tels que celui de la figure 3 ;
  • la figure 5 est une vue en perspective de principe d'un métier conforme à l'invention et incorporant le dispositif des figures 1 à 4 ;
  • la figure 6 est une vue en perspective d'une partie du métier de la figure 5 et
  • la figure 7 est une vue analogue à la figure 2, pour un dispositif conforme à un second mode de réalisation de l'invention.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of two embodiments of a crowd forming device and a craft in accordance with its principle. , given solely by way of example and with reference to the accompanying drawings in which:
  • the figure 1 is a perspective perspective view of a portion of a shedding device according to a first embodiment of the invention;
  • the figure 2 is a basic section along the line II-II to the figure 1 ;
  • the figure 3 is an exploded perspective view of a module of the device of figures 1 and 2
  • the figure 4 is a perspective view of some of the device's figures 1 and 2 incorporating several modules such as that of the figure 3 ;
  • the figure 5 is a perspective view in principle of a loom according to the invention and incorporating the device of the Figures 1 to 4 ;
  • the figure 6 is a perspective view of a part of the craft of the figure 5 and
  • the figure 7 is a view similar to the figure 2 for a device according to a second embodiment of the invention.

L'actionneur rotatif électrique 1 représenté à la figure 1 est un servomoteur pourvu d'un arbre de sortie cannelé 11 dont on note X-X' l'axe géométrique longitudinal. Cet axe est parallèle à la direction D des fils de trame du métier à tisser.The electric rotary actuator 1 shown in FIG. figure 1 is a servomotor provided with a splined output shaft 11 which XX 'is noted the longitudinal geometric axis. This axis is parallel to the direction D of the weft son of the loom.

A proximité de l'actionneur 1 sont disposés d'autres actionneurs 1' de même type qui sont représentés en traits-mixtes à la figure 1 et dont les arbres de sortie non représentés sont parallèles à l'arbre 11.In the vicinity of the actuator 1 are arranged other actuators 1 'of the same type which are represented in phantom to the figure 1 and whose unrepresented output shafts are parallel to the shaft 11.

Sur l'arbre 11 sont montés plusieurs modules 2 identiques qui comprennent chacun un pignon 21 disposé autour de l'arbre 11 et pourvu d'une ouverture centrale lui permettant de coopérer avec les cannelures de cet arbre pour être entraîné en rotation autour de l'axe X-X'. Les modules 2 peuvent coulisser à jeu réduit sur l'arbre 11 correspondant. Chaque module 2 comprend également une crémaillère 22 rectiligne et globalement parallèle à un axe Z-Z' incliné par rapport à l'horizontale en configuration normale d'utilisation du métier M.On the shaft 11 are mounted several identical modules 2 which each comprise a pinion 21 disposed around the shaft 11 and provided with a central opening allowing it to cooperate with the splines of this shaft to be rotated around the shaft. X-X 'axis. The modules 2 can slide with reduced clearance on the corresponding shaft 11. Each module 2 also comprises a rectilinear rack 22 and generally parallel to an axis Z-Z 'inclined relative to the horizontal in the normal configuration of use of the trade M.

Chaque module 2 comprend également un boîtier unitaire 23 dans lequel le pignon 21 est monté libre en rotation, alors que la crémaillère 22 peut coulisser; selon sa direction longitudinale, dans une rainure 43, ménagée entre un module 2 et un module 2' voisin et obturée par une plaque de finition 44.Each module 2 also comprises a unitary housing 23 in which the pinion 21 is rotatably mounted, while the rack 22 is slidable; in its longitudinal direction, in a groove 43, formed between a module 2 and a neighboring module 2 'and closed by a finishing plate 44.

On note e l'écart selon l'axe X-X' entre deux modules 2 voisins montés sur l'arbre 11. Il ressort de la figure 1 que cet écart n'est pas forcément constant. En outre, compte tenu de la géométrie de l'arbre 11 qui est cannelé sur toute sa longueur, les modules 2 peuvent être déplacés parallèlement à l'axe X-X', ce qui permet de faire varier les valeurs de l'écart e. On comprend également qu'il est possible d'ajouter ou de supprimer des modules 2 sur l'arbre 11.We note e the difference along the axis XX 'between two adjacent modules 2 mounted on the shaft 11. It appears from the figure 1 that this difference is not necessarily constant. In addition, given the geometry of the shaft 11 which is grooved over its entire length, the modules 2 can be moved parallel to the axis X-X ', which makes it possible to vary the values of the difference e . It is also understood that it is possible to add or remove modules 2 on the shaft 11.

Au niveau de son extrémité inférieure 22a, chaque crémaillère 22 est solidaire de l'extrémité supérieure 24a d'un jonc 24 en carbone-époxy. Les éléments 22 et 24 peuvent être collés ou soudés ensemble, ou fixés par tout autre moyen approprié. Le jonc 24 est un élément semi-rigide dont l'extrémité inférieure 24b est fixée à une lisse 3 pourvue d'un oeillet 31 de passage d'un fil de chaîne 4.At its lower end 22 a, each rack 22 is integral with the upper end 24 has a ring 24 in carbon-epoxy. The elements 22 and 24 may be glued or welded together, or fixed by any other suitable means. The rod 24 is a semi-rigid element whose lower end 24b is fixed to a smooth 3 provided with an eyelet 31 for the passage of a warp thread 4.

Le jonc 24 est apte à exercer, sur la lisse 3 associée, un effort F1 de traction vers le haut, et un effort de F'1 de poussée vers le bas, de sorte que la lisse 3 est commandée positivement par le jonc 24 sans nécessité d'utiliser un ressort de rappel.The ring 24 is able to exert, on the associated arm 3, a pulling force F 1 upwards, and a force F ' 1 pushing downwards, so that the arm 3 is positively controlled by the rod 24 without the need to use a return spring.

Le jonc 24 peut être réalisé dans d'autres matériaux compatibles avec sa fonction. Il peut, par exemple, être en matière plastique renforcée, en acier ou en fibres de verre.The ring 24 can be made of other materials compatible with its function. It may, for example, be made of reinforced plastic, steel or glass fibers.

Le métier M représenté à la figure 5 comprend une ensouple 101 et une bobine 102 entre lesquelles circulent les fils de chaîne 4 du métier.The trade M represented at figure 5 comprises a beam 101 and a coil 102 between which the warp threads 4 of the loom circulate.

On note D la direction des duites sur le métier M, c'est-à-dire la direction des fils de trame.D denotes the direction of the picks on the trade M, that is to say the direction of the weft son.

Le métier M comprend également un châssis 104 supportant les éléments 101 et 102 et un système non représenté de passage des duites.The loom M also comprises a frame 104 supporting the elements 101 and 102 and a not shown system for passing the picks.

Le châssis 104 se prolonge par une superstructure 105 disposée au-dessus de la partie principale du métier M et supportant un dispositif 110 de formation de la foule et la plaque à trous 5.The frame 104 is extended by a superstructure 105 disposed above the main part of the loom M and supporting a shedding device 110 and the hole plate 5.

Ce dispositif est réparti en deux blocs 110A et 110B montés de façon indépendante sur la superstructure 105.This device is divided into two blocks 110A and 110B independently mounted on the superstructure 105.

Le bloc 110A est représenté partiellement à la figure 6. Il comprend deux platines 111 et 112 entre lesquelles est défini un volume V. Sur chaque platine 111 ou 112 sont montés des actionneurs rotatifs électriques 1 dont les arbres de sortie 11 s'étendent, à travers la platine 111 ou 112, dans le volume V. Pour la clarté du dessin, seule une partie des arbres 11 apparaît à la figure 6.Block 110A is partially represented at figure 6 . It comprises two plates 111 and 112 between which is defined a volume V. On each plate 111 or 112 are mounted electric rotary actuators 1 whose output shafts 11 extend, through the plate 111 or 112, in the volume V For the sake of clarity, only a part of the trees 11 appears at the figure 6 .

Les platines 111 et 112 et les actionneurs 1 sont disposés dans la superstructure 105, de telle sorte que les arbres 11, qui sont parallèles entre eux, sont également globalement parallèles à la direction D des duites.The plates 111 and 112 and the actuators 1 are arranged in the superstructure 105, so that the 11, which are parallel to each other, are also generally parallel to the direction D of the picks.

Les actionneurs 1 sont disposés en rangées et en colonnes sur les platines 111 et 112.The actuators 1 are arranged in rows and columns on the plates 111 and 112.

Dans l'exemple représenté, la platine 111 supporte six rangées de huit actionneurs 1 qui forment huit colonnes. La platine 112 porte cinq rangées d'actionneurs formant également huit colonnes.In the example shown, the plate 111 supports six rows of eight actuators 1 which form eight columns. The plate 112 carries five rows of actuators also forming eight columns.

A la figure 6, seule une partie du dispositif est représenté et l'on peut identifier trois rangées R1 à R3, dont cinq actionneurs sont visibles et forment cinq colonnes C1 à C5 sur la platine 111, alors que deux rangées R4 et R5 d'actionneurs forment cinq colonnes C'1 à C'5 sont visibles sur la platine 112.To the figure 6 , only a part of the device is shown and it is possible to identify three rows R 1 to R 3 , of which five actuators are visible and form five columns C 1 to C 5 on the plate 111, while two rows R 4 and R 5 actuators form five columns C ' 1 to C' 5 are visible on the plate 112.

L'axe X-X' est parallèle à la direction D et perpendiculaire à un axe Y-Y' selon lequel s'étendent les rangées R1 à R5 et à un axe Z-Z' selon lequel s'étendent les colonnes C1 à C5 et C'1 à C'5.The axis XX 'is parallel to the direction D and perpendicular to an axis YY' along which the rows R 1 to R 5 extend and to an axis ZZ 'along which the columns C 1 to C 5 and C extend. ' 1 to C' 5 .

A la figure 5, seules quelques gaines 25 sont représentées entre les blocs 110A et 110B, d'une part, et le voisinage de la zone de passage des duites, d'autre part. Ceci vise de simplifier le dessin. En pratique, de nombreuses gaines 25 sont utilisées en lieu et place d'un harnais classique et métier Jacquard.To the figure 5 only a few sheaths 25 are shown between the blocks 110A and 110B, on the one hand, and the vicinity of the passage zone of the picks, on the other hand. This is to simplify the drawing. In practice, many sheaths 25 are used instead of a conventional harness and Jacquard loom.

Les différents modules 2 destinés à coopérer avec les arbres 11 des actionneurs 1 de la rangée R1 sont intégrés dans un sous-ensemble 40 représenté en perspective partiellement éclatée à la figure 4. Ce sous-ensemble 40 s'étend globalement selon une direction parallèle à l'axe Y-Y' et comprend huit modules 20. Il est formé par un boîtier monobloc 41 en matière plastique constituant plusieurs boîtiers unitaires 23 et dans lequel sont formés des logements 42 de réception des pignons 21 et des rainures 43 de coulissement des crémaillères 22. La plaque de fermeture 44 du sous-ensemble 40 est représentée retirée à la figure 4. Il est respectivement prévu dans le boîtier 41 et dans la plaque 44 des ouvertures 45 et 46 de passage des arbres 11.The various modules 2 intended to cooperate with the shafts 11 of the actuators 1 of the row R 1 are integrated in a subassembly 40 represented in perspective partially exploded at the figure 4 . This subassembly 40 extends generally in a direction parallel to the axis YY 'and comprises eight modules 20. It is formed by a monoblock housing 41 of plastic material constituting several unitary housings 23 and in which are formed housing 42 of receiving the pinions 21 and grooves 43 for sliding the racks 22. The plate closure 44 of the subassembly 40 is shown removed at figure 4 . It is provided respectively in the housing 41 and in the plate 44 of the openings 45 and 46 for the passage of the shafts 11.

Ainsi, les huit modules 20 destinés à être entraînés par les actionneurs de la rangée R1 peuvent être mis en place sur les arbres 11 correspondants, de façon groupée, en manipulant le sous-ensemble 40. Leur positionnement le long de l'axe X-X' de ces différents arbres peut être réglé également de façon groupée, ce qui représente un gain de temps important lors de la construction du dispositif 10.Thus, the eight modules 20 intended to be driven by the actuators of the row R 1 can be placed on the corresponding shafts 11, in a grouped manner, by manipulating the subassembly 40. Their positioning along the axis XX These different shafts can also be adjusted in a grouped manner, which represents a significant time saving during the construction of the device 10.

A la figure 6, seuls quelques sous-ensembles 40 ont été représentés pour la clarté du dessin. De même, certains arbres 11 sont omis pour la clarté du dessin. On comprend cependant qu'un grand nombre de tels sous-ensembles peut être prévu entre les platines 111 et 112 en fonction de l'armure à réaliser.To the figure 6 only a few subsets 40 have been shown for clarity of the drawing. Similarly, some trees 11 are omitted for clarity of the drawing. However, it is understood that a large number of such subsets can be provided between the plates 111 and 112 depending on the armor to achieve.

Comme il ressort plus particulièrement de la figure 1, chaque jonc 24 est disposé à l'intérieur d'une gaine 25 de guidage qui s'étend entre une plaque à trous 5 et une planche d'empoutage 6 pourvues respectivement d'orifices 5a et 6a de réception et d'immobilisation des extrémités supérieures 25a et inférieures 25b des gaines 25. La géométrie des gaines 25 entre la plaque 5 et la planche 6 est variable et adaptée à l'armure recherchée. En particulier, la distance d entre deux extrémités inférieures 25b de gaine 25, au niveau de la planche 6, n'est pas forcément égale à la distance d' entre deux extrémités supérieures 25a de gaine 25, niveau de la planche 5, cette distance d' étant, quant à elle, sensiblement égale à l'écart e entre les modules 2 sur l'arbre 11. En effet, il est possible de faire suivre aux joncs 24 des trajets différents en conformant les gaines 25 de façon différente. Les gaines 25 correspondant à des joncs commandés par un même arbre 11 sont, de préférence mais pas forcément, alignées au niveau de la planche 6, comme cela ressort de la figure 1.As is clear from the figure 1 Each ring 24 is disposed within a guide sheath 25 which extends between an apertured plate 5 and a comber board 6 provided with openings 5 and 6 respectively have a receiving and locking the upper ends 25a and lower 25 b of the sheaths 25. the geometry of ducts 25 between the plate 5 and the plate 6 is variable and adapted to the desired weave. In particular, the distance d between two lower ends 25 b of tube 25, at the board 6 is not necessarily equal to the distance d 'between upper ends 25 to sheath 25, the level of the board 5, this distance d 'being, for its part, substantially equal to the deviation e between the modules 2 of the shaft 11. Indeed, it is possible to follow the rods 24 of the various paths by shaping the sheaths 25 differently . The sheaths 25 corresponding to rods controlled by the same shaft 11 are preferably, but not necessarily, aligned at the level of the board 6, as is apparent from the figure 1 .

En pratique, les extrémités 25a et 25b des gaines 25 sont immobilisées au voisinage des orifices 5a et 6a, les gaines 25 pouvant dépasser au-dessus de la planche 5 et en-dessous de la plaque 6.In practice, the ends 25 a and 25 b of the sheaths 25 are immobilized in the vicinity of the openings 5a and 6a, the duct 25 may protrude above the plate 5 and below the plate 6.

Une grande souplesse est donc laissée à l'utilisateur du métier qui, en jouant sur la répartition spatiale des gaines 25 peut obtenir des d'armures variées, avec un métier particulièrement compact.A great deal of flexibility is therefore left to the user of the profession who, by playing on the spatial distribution of the sheaths 25, can obtain a variety of weaves, with a particularly compact loom.

Dans chaque boîtier 23 est prévu un logement 23a de réception d'une première extrémité 26a d'une languette élastique 26 dont la seconde extrémité 26b est libre par rapport au boîtier 23. Cette extrémité 26b est destinée à être engagée dans une rainure longitudinale 22b d'une crémaillère 22 d'un module 2 voisin. La rainure 22b s'étend du côté de la crémaillère 22 opposé à sa denture 22c.In each housing 23 is provided a housing 23 has a first receiving end 26 has a resilient tongue 26, the second end 26 b is free relative to the housing 23. This end 26 b is intended to be engaged in a longitudinal groove 22 b of a rack 22 of a neighboring module 2. The groove 22b extends on the side of the rack 22 opposite to its toothing 22c .

Ainsi, l'extrémité 26b de la languette 26 peut coulisser dans la rainure 22b. En outre, la languette 26 peut venir en appui contre une butée 22d prévue en partie inférieure de la rainure 22b, comme représenté sur la partie gauche de la figure 2. Dans ce cas, la crémaillère 22 est en position de point mort haut, de même que le jonc 24 et la lisse 3 associé.Thus, the end 26b of the tongue 26 can slide in the groove 22b . In addition, the tongue 26 can bear against a stop 22 d provided in the lower part of the groove 22 b , as shown on the left side of the figure 2 . In this case, the rack 22 is in the top dead center position, as is the rod 24 and the associated arm 3.

Si l'actionneur commandant l'arbre 11 représenté sur la gauche de la figure 2 transmet au pignon 21 un effort de rotation R dans le sens trigonométrique sur cette figure, la languette 26 s'oppose à un mouvement supplémentaire vers le haut de la crémaillère 22 et la denture 21c du pignon 21 échappe par rapport à la denture 22c, la languette 26 ayant tendance à ramener en permanence la denture 22c en prise avec la denture 21c.If the actuator controlling the shaft 11 shown on the left of the figure 2 transmits to the pinion 21 a rotational force R in the counterclockwise direction in this figure, the tab 26 opposes an additional upward movement of the rack 22 and the toothing 21c of the pinion 21 escapes relative to the toothing 22c , the tab 26 having a tendency to permanently bring the toothing 22c into engagement with the toothing 21c .

Cette construction permet de régler en une fois les points morts hauts des différentes crémaillères 22 entraînées par un même actionneur 1, dans la mesure où il suffit de faire tourner l'arbre correspondant 11 jusqu'à ce que toutes les dentures 22c des crémaillères viennent échapper aux dentures 21c des pignons, alors que les crémaillères sont en butée contre les languettes élastiques associées.This construction makes it possible to adjust in one go the high dead points of the various racks 22 driven by the same actuator 1, insofar as it suffices to rotate the corresponding shaft 11 until all the teeth 22 c of the racks come escape the teeth 21 c gables, while the racks are in abutment against the associated elastic tabs.

En variante, cette languette pourrait être prévue pour coopérer avec une butée non représentée ménagée au voisinage de la partie supérieure de la rainure 22b, ceci permettant le réglage du point mort bas de la course des crémaillères.Alternatively, this tongue could be provided to cooperate with a stop not shown formed in the vicinity of the upper portion of the groove 22b , allowing the adjustment of the bottom dead center of the race of the racks.

Dans le second mode de réalisation de l'invention représenté à la figure 7, les éléments analogues à ceux du premier mode de réalisation portent des références identiques augmentées de 50. Dans ce mode de réalisation, les modules 52 comprennent des pignons 71 associés à des crémaillères 72 reliées à des arcades 74 permettant de commander des lisses 53. Les arcades 74 permettent d'exercer un effort F1 de traction vers le haut sur les lisses 53, alors que les ressorts de rappel 77 permettent d'exercer sur ces lisses un effort dirigé vers le bas.In the second embodiment of the invention shown in figure 7 , elements similar to those of the first embodiment carry identical references increased by 50. In this embodiment, the modules 52 comprise pinions 71 associated with racks 72 connected to arches 74 for controlling heddles 53. arches 74 can exert an effort F 1 upward traction on the rails 53, while the return springs 77 can exert on these smooth a downward force.

Les ressorts 77 peuvent permettre une synchronisation des différentes crémaillères entraînées par un même arbre 61, en jouant un rôle similaire à celui des languettes du premier mode de réalisation.The springs 77 can allow synchronization of the different racks driven by the same shaft 61, playing a role similar to that of the tabs of the first embodiment.

Ce second mode de réalisation présente l'avantage particulier d'être utilisable avec un harnais Jacquard classique, une planche à trous et une plaque d'empoutage connues.This second embodiment has the particular advantage of being usable with a conventional Jacquard harness, a known ploy board and a plow plate.

L'invention a été représentée avec chaque élément de transmission d'effort 24 ou 74 relié à une unique lisse 3 ou 53. Cependant, il est possible de commander plusieurs lisses avec un tel élément.The invention has been represented with each force transmission element 24 or 74 connected to a single rail 3 or 53. However, it is possible to order several healds with such an element.

L'invention a été représentée avec les arbres 11 et 61 des actionneurs 1 globalement parallèles à la direction D des fils de trame. Ceci n'est pas obligatoire car il est possible d'utiliser le caractère flexible des moyens de transmission d'effort 24 et 74.The invention has been represented with the shafts 11 and 61 of the actuators 1 generally parallel to the direction D of the weft threads. This is not mandatory because it is possible to use the flexible nature of the force transmission means 24 and 74.

Lorsqu'il est fait référence à un arbre sortie, on entend tout arbre entraîné par un actionneur, qu'il soit en prise directe avec celui-ci ou à travers un réducteur. L'arbre de sortie peut être aligné ou non aligné avec l'axe géométrique de la partie tournante de l'actionneur, le réducteur éventuel pouvant jouer le rôle d'un renvoi d'angle.When referring to an output shaft is meant any shaft driven by an actuator, whether it is in direct contact with it or through a reducer. The output shaft may be aligned or non-aligned with the geometric axis of the rotating portion of the actuator, the optional reducer may act as a bevel gear.

L'invention a été représentée avec des pignons rapportés sur les arbres de sorties des actionneurs. Elle s'applique également avec un actionneur pourvu d'un arbre de sortie dont la section transversale est telle qu'il peut engrener directement avec une ou des crémaillères, cet arbre constituant ainsi lui-même un ou des pignons au sens de la présente invention. En d'autres termes, dans le cas où un tel arbre engrène avec plusieurs crémaillères, il forme une succession de pignons accolés les uns aux autres.The invention has been shown with pinions reported on the output shafts of the actuators. It also applies with an actuator provided with an output shaft whose cross section is such that it can mesh directly with one or more racks, this shaft thus constituting itself one or more gears within the meaning of the present invention. . In other words, in the case where such a shaft meshes with several racks, it forms a succession of gears contiguous to each other.

L'invention a été représentée avec des actionneurs disposés au-dessus des lisses et de la foule. Elle s'applique cependant au cas où les actionneurs sont placés au-dessous des lisses et de la foule, ce qui facilite l'accès à la foule et réduit l'encombrement.The invention has been shown with actuators arranged above the rails and the crowd. However, it applies in the case where the actuators are placed below the rails and the crowd, which facilitates access to the crowd and reduces clutter.

Claims (21)

  1. Shedding device on a Jacquard type weaving machine, this device comprising at least one electric rotary actuator (1), characterised in that this actuator (1) is capable of entraining in rotation (R) a least one pinion (21; 71) engaged with a rack (22; 72), which is connected by a power transmission element (24; 74) to at least one heddle (3; 53).
  2. Device according to claim 1, characterised in that this actuator is capable of entraining in rotation several pinions (21; 71) connected with racks (22; 72), which are distributed in the longitudinal direction (X-X') of an output shaft (11; 61) of this actuator (1).
  3. Device according to claim 2, characterised in that the distance (e) between these racks (22; 72) in this direction (X-X') and/or the number of racks entrained by this actuator (1) are adjustable.
  4. Device according to one of claims 2 or 3, characterised in that the pinions (21; 71) for entraining these racks (22; 72) are capable of sliding in the longitudinal direction (X-X') of this shaft (11; 61) with a small clearance space and in that this shaft and these pinions have complementary profiles, which are grooved or equivalent.
  5. Device according to one of claims 2 to 4, characterised in that it comprises means of synchronisation of the racks (22; 72) engaged with the pinions (21; 71), which are entrained by one and the same actuator (1), these means of synchronisation comprising a flexible element (26; 77), which is capable of limiting the path of the rack to a position, beyond which its teeth (22c) would be thrown out of the teeth (21c) of the associated pinion.
  6. Device according to claim 5, characterised in that this flexible element (26) is provided with an end (26b), which is capable of being supported against a stop (22d), which is formed on the relevant rack (22).
  7. Device according to claim 6, characterised in that this rack (22) is provided with a longitudinal groove (22b) for receiving and sliding this second end (26b) of this element (26).
  8. Device according to one of the previous claims, characterised in that this power transmission element is a semi-rigid rod (24).
  9. Device according to claim 8, characterised in that this rod (24) is capable of sliding in a guide sleeve (25).
  10. Device according to one of claims 8 or 9, characterised in that this rod (24) is made in a synthetic material with a carbon-epoxy base.
  11. Device according to one of claims 1 to 7, characterised in that this power transmission element is a flexible funicular element (74) of the arch type.
  12. Device according to one of the previous claims, characterised in that it comprises electric rotary actuators arranged in rows and/or columns above the machine, in that these actuators (1) are arranged so that their respective output shafts (11) are parallel to each other as a whole, preferably parallel to the direction (D) of the weft threads of the machine (M) as a whole, and in that each output shaft is capable of entraining several pinions (21), each engaged with a rack (22), which is kinetically connected to at least one heddle (3) for control of a warp thread (4).
  13. Device according to claim 12, characterised in that these actuators (1) are distributed over plates (111, 112), which are immobilised in relation to the superstructure (105) of the machine (M) and arranged parallel to the warp threads (4) as a whole.
  14. Device according to claim 13, characterised in that these actuators (1) are distributed in two groups (R1-R3, R4-R5), each supported by a plate (111, 112), the output shafts (11) of these actuators extending essentially in a volume (V) defined between these plates.
  15. Device according to one of claims 12 to 14, characterised in that several pinions (15) entrained by shafts (11), which are parallel and distinct, together with the relevant racks (22) are incorporated in a subassembly (40) extending in a direction (Y-Y'), which is perpendicular to these shafts as a whole.
  16. Device according to claim 15, characterised in that this subassembly (40) comprises a number of pinions (21) and racks (22), which corresponds to the number of actuators of a row (R1-R5).
  17. Device according to claim 15 or 16, characterised in that each subassembly (40) comprises a common casing (41), which is provided with openings (45) for these shafts (11) to pass through and housings (42, 43) to receive these pinions (21) and these racks (22).
  18. Device according to one of the previous claims, characterised in that it comprises a plate with holes (5), which is immobilised in relation to the superstructure (105) of the machine (M), near these actuators (1) and a tie board (6) arranged near the heddles (3) and in that these power transmission elements (24; 74) between these racks (22; 72) and the associated heddles (3) each follow a path defined by the openings (5a, 6a) made in this plate and this board respectively.
  19. Device according to one of the previous claims, characterised in that this actuator (1) is arranged below these heddles (3; 53) and below the shed (4).
  20. Device according to one of claims 1 to 3 and 5 to 19, characterised in that this pinion is formed by the output shaft of this actuator or a part of this shaft.
  21. Weaving machine (M), characterised in that it comprises a shedding device (1-7; 52-77) according to one of the previous claims.
EP02767535A 2001-06-29 2002-06-28 Shedding device on a jacquard-type weaving machine Expired - Lifetime EP1399609B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0108663 2001-06-29
FR0108663A FR2826671B1 (en) 2001-06-29 2001-06-29 DEVICE FOR FORMING A CROWD ON A JACQUARD-TYPE WEAVING MATERIAL
PCT/FR2002/002267 WO2003002799A1 (en) 2001-06-29 2002-06-28 Shedding device on a jacquard-type weaving machine

Publications (2)

Publication Number Publication Date
EP1399609A1 EP1399609A1 (en) 2004-03-24
EP1399609B1 true EP1399609B1 (en) 2009-05-20

Family

ID=8864958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02767535A Expired - Lifetime EP1399609B1 (en) 2001-06-29 2002-06-28 Shedding device on a jacquard-type weaving machine

Country Status (10)

Country Link
US (1) US7007721B2 (en)
EP (1) EP1399609B1 (en)
JP (1) JP4173441B2 (en)
KR (1) KR100840998B1 (en)
CN (1) CN100336953C (en)
AT (1) ATE431863T1 (en)
DE (1) DE60232410D1 (en)
FR (1) FR2826671B1 (en)
TW (1) TW567259B (en)
WO (1) WO2003002799A1 (en)

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GB2484309B (en) * 2010-10-06 2017-11-22 Ulster Carpet Mills (Holdings) Ltd Apparatus and method for loading tufts into a tuft carrier
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Also Published As

Publication number Publication date
JP2004530812A (en) 2004-10-07
KR100840998B1 (en) 2008-06-24
CN1520475A (en) 2004-08-11
KR20040012994A (en) 2004-02-11
FR2826671B1 (en) 2003-09-12
US7007721B2 (en) 2006-03-07
JP4173441B2 (en) 2008-10-29
EP1399609A1 (en) 2004-03-24
TW567259B (en) 2003-12-21
WO2003002799A1 (en) 2003-01-09
CN100336953C (en) 2007-09-12
FR2826671A1 (en) 2003-01-03
ATE431863T1 (en) 2009-06-15
US20050103394A1 (en) 2005-05-19
DE60232410D1 (en) 2009-07-02

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