EP1069219A1 - Selvedge shedding device and weaving loom with such a device - Google Patents

Selvedge shedding device and weaving loom with such a device Download PDF

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Publication number
EP1069219A1
EP1069219A1 EP00420103A EP00420103A EP1069219A1 EP 1069219 A1 EP1069219 A1 EP 1069219A1 EP 00420103 A EP00420103 A EP 00420103A EP 00420103 A EP00420103 A EP 00420103A EP 1069219 A1 EP1069219 A1 EP 1069219A1
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EP
European Patent Office
Prior art keywords
frames
edges
loom
flexible link
housing
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Granted
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EP00420103A
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German (de)
French (fr)
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EP1069219B1 (en
Inventor
Martin Burkert
Ulrich Rausch
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Staeubli GmbH
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Staeubli GmbH
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Publication of EP1069219A1 publication Critical patent/EP1069219A1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C11/00—Selvedge shedding mechanisms not forming part of main shedding mechanism

Definitions

  • the invention relates to a device for training the crowd for the realization of a selvedge and a loom equipped with such a device.
  • a loom makes it possible to make a fabric on a width which can be important by forming a pattern or weave thanks to an appropriate device, in particular a mechanical Jacquard or dobby.
  • the side edges of the current fabric training most often called selvedges, are trained with the fabric and are likely to fray. It is known to use a cam system to control beams specific for side chain wires. he is also known, for example from FR-A-2 685 014, to use a mechanical Jacquard specific for the realization of a selvedge on a fabric being woven.
  • Such a Jacquard mechanic is relatively complex and requires its mechanical connection to a main drive shaft, which involves mounting a like a tree at a distance from a driving tree of the trade.
  • a Jacquard mechanics is a relatively sophisticated system which is not necessarily suitable for the simplest cases in which a selvedge with a substantially uniform pattern must be created.
  • EP-A-0 750 061 proposes a device for the realization a false selvedge with no gauze which does not allow weaving a real selvedge because it only includes two smooth associated with a smooth panty, these smooth being mounted in overhang on a belt and mechanically stressed in permanence. Relatively massive beams should be used, their inertia and rigidity not being compatible with the weaving of a selvedge.
  • the invention aims to propose a device for training the crowd for a real edge of simple construction, so reliable, and which does not necessarily have to be connected to a driving force of the trade.
  • the invention relates to a device for crowd training for the realization of a selvedge on a fabric being produced on a loom, characterized in that it comprises two frames each carrying several smooth and provided with longitudinal edges and upper edges and lower. These frames are moved, according to a movement substantially vertical alternating in phase opposition, by at least one flexible link actuated by an electric motor and connected to their upper or lower edges.
  • the two heald frames allow to order the movement of the chain son from one loom to weave in a simple weave movement adapted to the selvedges and this, thanks to the electric motor which must be connected to a control power supply unit by electrical connection significantly easier to install than a drive shaft.
  • the use of heald frames makes it possible to order heald parallel in sufficient number for weaving corresponding to the width of a standard selvedge, the frames allowing precise positioning of the beams, then that they effectively resist the efforts transmitted to them by the flexible link.
  • This link flexible can be a belt, chain or equivalent.
  • the electric motor can be easily controlled, so that the movement of the heald frames is out of phase with respect to to that of the main crowd training device of the craft, whether dobby frames or harnesses Jacquard.
  • the invention finally relates to a loom equipped with minus a device as previously described.
  • a weaving loom includes a device such as previously described at each edge of the fabric in manufacturing course.
  • the loom shown in Figure 1 includes several heald frames 1 arranged parallel to each other others and having beams 2, the eyelets 3 of which are provided to guide chain wires 4.
  • Each frame 1 is controlled, as shown only for the first frame visible in FIG. 1, by connecting rods 5 integral with return levers 6 connected together by a transverse connecting rod 7.
  • One of the levers 6 is attacked by a connecting rod control 8 whose reciprocating movement in the direction of arrow F 1 is controlled by a dobby 9.
  • the weft threads are supposed to be moved, by a conventional mechanism, not shown, perpendicular to the warp threads, as shown by the arrow F 2 .
  • a beam 10 is arranged above the crowd, that is to say the zone of crossing of the warp threads 4 and the weft threads, parallel to the direction of the arrow F 2 .
  • this beam 10 are suspended two devices 20 and 20 ′, analogous and in accordance with the invention, the device 20 being more particularly visible in FIGS. 2 and 3.
  • the device 20 comprises a housing 21 slidably mounted on the beam 10 by means of four tie rods 22 whose heads 22 a are engaged in concave grooves 10 a and 10 b of the beam 10.
  • the device 20 can slide along the beam 10 in the direction of the arrow F 3 which is parallel to the arrow F 2 , while it is immobilized when these nuts 22 b are tightened.
  • the housing 21 supports an electric motor 23 which can be of any known type, but which is advantageously a servo motor.
  • a toothed pulley 25 around which is disposed a toothed belt 26 whose two ends 26 a and 26 b are respectively secured to the respective upper edges 27 a , and 28 a of two frames stringers 27 and 28. More specifically, the end 26 a of the belt 26 is fixed to the upper edge 27 a , of the frame 27 by means of four screws 29, while the end 26 b of the belt 26 is fixed to the upper edge of the frame 28 by four screws similar to the screws 29. Of course, other means of fixing the belt 26 to the frames 27 and 28 are conceivable.
  • the rotation of the motor 23 positively controls the frames 27 and 28 thanks to the cooperation of the complementary notches of the pulley 25 and of the belt 26.
  • a second belt 30, which may or may not be notched, connects the respective lower edges 27 b and 28 b of the frames 27 and 28 passing around a return pulley 31 disposed in the lower part of the housing 21.
  • a and 30 b the ends of the belt 30 secured to the edges 27 b and 28 b of the frames 27 and 28 by means of screws 29.
  • Elements 26, 27, 28 and 30 form a closed loop comprising two rigid parts, 27 and 28, and two parts flexible, 26 and 30.
  • the alternating rotation of the pulley 25 alternately drives the frames 27 and 28 in a substantially vertical direction, the movement of the frames being represented by the arrow F 4 .
  • Each heald frame 27 or 28 carries several healds 32 each provided with an eyelet 33 for passing the warp threads 4 'located on the left of Figure 1 and intended to form the edge.
  • the mounting of the beams 32 on the frames 27 and 28 can be adapted from known techniques for mounting beams 2 on the main frames 1 of the loom.
  • the ends 26 a, 26 b, 30 a and 30 b of the belts 26 and 30 are integral with the upper edges respectively 27a, and 28a, and lower 27 b and 28 b of the frames 27 and 28 in the central part of these edges , so that there is no overhang between the frames 27 and 28 and the flexible link formed by the belts 26 and 30.
  • Two return pulleys 34 and 35 allow the vertical strands of belts 26 and 30 in parallel planes relatively close, so that the heald frames 27 and 28 move in equally close parallel planes. This allows the device 20 to be very compact.
  • the pulley 31 is mounted in an oblong slot 36 of the case 21, which allows a tension adjustment of the belts 26 and 30 by displacement of the axis of the pulley 31 in the light 36.
  • Openings 37 and 38 provided in the sides of the housing 21 form two longitudinal slides in which the longitudinal edges 27 c , 28 c and 27 d , 28 d of the frames 27 and 28 are respectively engaged.
  • the housing 21 makes it possible to guide the frames 27 and 28 in their vertical reciprocating movement F 4 .
  • the device 20 has a modular, compact and rigid structure which can be installed quickly on a weaving loom with easy adjustment during time-delaying, by sliding along the beam 10 as shown by the arrow F 3 .
  • the device of the invention has the particular advantage that it can be installed on weaving looms already in service by the simple addition of a beam equivalent to the beam 10 and two mechanisms 20 and 20 '.
  • the actuator 23 is controlled regardless of the command generated by the loom or the dobby 9, so that a phase shift can be obtained in a particularly simple way between the bottom movement of the crowd of frames 1 and the crowd movement of the edges, at level of frames 27 and 28.
  • All training devices cams of conventional cam systems or the shafts of the FR-A-2 685 014 can be deleted, so that the assembly and disassembly of devices 20 and 20 'on the loom is significantly easier than in known systems.
  • the case 21 can include two slides on each side, each slide being adapted to receive and guide an edge longitudinal of a frame 27 or 28. This makes it possible to obtain a individualized guiding of the frames in translation.
  • a profession equipped with devices in accordance with the invention 20 and 20 ' is easier to control for an operator and more economical in investment and operating cost.
  • the invention has been shown with the beam 10 arranged above the crowd. It is however applicable with a beam arranged transversely in the lower part of the loom, that is to say below the crowd, and supporting devices analogous to devices 20 and 20 'above it.
  • the invention has been represented with a loom equipped with a dobby; however, it is applicable to Jacquard-type looms.

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

Abstract

Ce dispositif (20) de formation de la foule pour la réalisation d'une lisière sur un tissu en cours de fabrication sur un métier à tisser comprend deux cadres (27) portant chacun plusieurs lisses (32) et pourvus de bords longitudinaux (27c, 27d) et de bords supérieur (27a) et inférieur (27b). Ces cadres (27) sont déplacés, selon un mouvement alternatif vertical (F4) en opposition de phases, par au moins un lien flexible (26, 30) actionné par un moteur électrique (23) et relié aux bords supérieurs (27a) ou inférieurs (27b) précités. <IMAGE>This crowd formation device (20) for producing a selvedge on a fabric being manufactured on a weaving loom comprises two frames (27) each carrying several healds (32) and provided with longitudinal edges (27c, 27d) and upper (27a) and lower (27b) edges. These frames (27) are moved, in a vertical reciprocating movement (F4) in phase opposition, by at least one flexible link (26, 30) actuated by an electric motor (23) and connected to the upper (27a) or lower edges (27b) mentioned above. <IMAGE>

Description

L'invention a trait à un dispositif de formation de la foule pour la réalisation d'une lisière et à un métier à tisser équipé d'un tel dispositif.The invention relates to a device for training the crowd for the realization of a selvedge and a loom equipped with such a device.

Un métier à tisser permet de fabriquer un tissu sur une largeur qui peut être importante en formant un motif ou armure grâce à un dispositif approprié, notamment une mécanique Jacquard ou une ratière. Les bords latéraux du tissu en cours de formation, le plus souvent dénommés lisières, sont formés avec le tissu et sont susceptibles de s'effilocher. Il est connu d'utiliser un système à cames pour commander des lisses spécifiques pour les fils de chaíne latéraux. Il est également connu, par exemple de FR-A-2 685 014, d'utiliser une mécanique Jacquard spécifique pour la réalisation d'une lisière sur un tissu en cours de tissage. Une telle mécanique Jacquard est relativement complexe et nécessite sa connexion mécanique à un arbre principal d'entraínement, ce qui implique le montage d'un tel arbre à distance d'un arbre moteur du métier. De plus, une mécanique Jacquard est un système relativement élaboré qui n'est pas nécessairement adapté aux cas les plus simples dans lesquels une lisière à motif sensiblement uniforme doit être créée.A loom makes it possible to make a fabric on a width which can be important by forming a pattern or weave thanks to an appropriate device, in particular a mechanical Jacquard or dobby. The side edges of the current fabric training, most often called selvedges, are trained with the fabric and are likely to fray. It is known to use a cam system to control beams specific for side chain wires. he is also known, for example from FR-A-2 685 014, to use a mechanical Jacquard specific for the realization of a selvedge on a fabric being woven. Such a Jacquard mechanic is relatively complex and requires its mechanical connection to a main drive shaft, which involves mounting a like a tree at a distance from a driving tree of the trade. In addition, a Jacquard mechanics is a relatively sophisticated system which is not necessarily suitable for the simplest cases in which a selvedge with a substantially uniform pattern must be created.

EP-A-0 750 061 propose un dispositif pour la réalisation d'une fausse lisière à pas de gaze qui ne permet pas le tissage d'une vrai lisière car il comprend uniquement deux lisses associées à une lisse culotte, ces lisses étant montées en porte à faux sur une courroie et sollicités mécaniquement en permanence. Des lisses relativement massives doivent être utilisées, leur inertie et leur rigidité n'étant pas compatibles avec le tissage d'une lisière.EP-A-0 750 061 proposes a device for the realization a false selvedge with no gauze which does not allow weaving a real selvedge because it only includes two smooth associated with a smooth panty, these smooth being mounted in overhang on a belt and mechanically stressed in permanence. Relatively massive beams should be used, their inertia and rigidity not being compatible with the weaving of a selvedge.

L'invention vise à proposer un dispositif de formation de la foule pour une vraie lisière de construction simple, donc fiable, et qui ne doit pas nécessairement être raccordé à un arbre moteur du métier.The invention aims to propose a device for training the crowd for a real edge of simple construction, so reliable, and which does not necessarily have to be connected to a driving force of the trade.

Dans cet esprit, l'invention concerne un dispositif de formation de la foule pour la réalisation d'une lisière sur un tissu en cours de fabrication sur un métier à tisser, caractérisé en ce qu'il comprend deux cadres portant chacun plusieurs lisses et pourvus de bords longitudinaux et de bords supérieur et inférieur. Ces cadres sont déplacés, selon un mouvement alternatif sensiblement vertical en opposition de phases, par au moins un lien flexible actionné par un moteur électrique et relié à leurs bords supérieurs ou inférieurs.In this spirit, the invention relates to a device for crowd training for the realization of a selvedge on a fabric being produced on a loom, characterized in that it comprises two frames each carrying several smooth and provided with longitudinal edges and upper edges and lower. These frames are moved, according to a movement substantially vertical alternating in phase opposition, by at least one flexible link actuated by an electric motor and connected to their upper or lower edges.

Grâce à l'invention, les deux cadres de lisses permettent de commander le déplacement des fils de chaíne d'un métier à tisser dans un mouvement d'armure simple adapté aux lisières et ce, grâce au moteur électrique qui doit être raccordé à une unité d'alimentation de commande par une liaison électrique sensiblement plus simple à installer qu'un arbre d'entraínement. L'utilisation de cadres de lisses permet de commander en parallèle des lisses en nombre suffisant pour un tissage correspondant à la largeur d'une lisière usuelle, les cadres permettant d'obtenir un positionnement précis des lisses, alors qu'ils résistent efficacement aux efforts que leur transmet le lien flexible. En particulier, le fait que les cadres ont des bords ou montants longitudinaux, supérieurs et inférieurs leur confère une rigidité compatible avec les accélérations qu'ils subissent et leur interaction avec des lisses classiques qui peuvent être au nombre de 50 ou 60 pour chaque cadre. Ce lien flexible peut être une courroie, une chaíne ou équivalent. Le moteur électrique peut être aisément commandé, de telle sorte que le mouvement des cadres de lisses est déphasé par rapport à celui du dispositif principal de formation de la foule du métier, qu'il s'agisse de cadres de ratière ou d'un harnais Jacquard.Thanks to the invention, the two heald frames allow to order the movement of the chain son from one loom to weave in a simple weave movement adapted to the selvedges and this, thanks to the electric motor which must be connected to a control power supply unit by electrical connection significantly easier to install than a drive shaft. The use of heald frames makes it possible to order heald parallel in sufficient number for weaving corresponding to the width of a standard selvedge, the frames allowing precise positioning of the beams, then that they effectively resist the efforts transmitted to them by the flexible link. In particular, the fact that executives have longitudinal, upper and lower edges or uprights confers a rigidity compatible with the accelerations they undergo and their interaction with classic rails which can be 50 or 60 for each frame. This link flexible can be a belt, chain or equivalent. The electric motor can be easily controlled, so that the movement of the heald frames is out of phase with respect to to that of the main crowd training device of the craft, whether dobby frames or harnesses Jacquard.

Selon des aspects avantageux de l'invention, le dispositif incorpore une ou plusieurs des caractéristiques suivantes :

  • Le lien flexible est formé par un tronçon supérieur reliant des bords supérieurs des cadres de lisses et un tronçon inférieur reliant des bords inférieurs de ces cadres. La division du lien flexible en deux tronçons permet d'utiliser la rigidité des cadres sur une partie de la boucle formée par le lien flexible, ce qui confère une bonne stabilité mécanique d'ensemble au dispositif de l'invention. Dans ce cas, les cadres sont avantageusement reliés aux tronçons supérieur et inférieur sensiblement au centre de leurs bords supérieurs et inférieurs respectifs. Cet aspect de l'invention évite qu'un porte-à-faux ne soit créé au niveau de la jonction entre les cadres et le lien flexible, d'où une stabilité dynamique du dispositif, y compris à haute vitesse.
  • Un boítier forme un support pour des poulies de renvoi du lien flexible et pour le moteur. Ce boítier permet de fabriquer un dispositif autonome sur le plan mécanique, ce qui facilite son montage sur un métier à tisser classique. Dans ce cas, le boítier comprend avantageusement au moins une glissière de guidage des cadres dans leur mouvement alternatif, ces cadres étant prévus pour être partiellement engagés dans cette glissière. En outre, des moyens de réglage de la position d'au moins une poulie de renvoi sur le boítier peuvent être prévus, le réglage de cette position permettant le réglage de la tension du lien flexible.
  • La position du dispositif est ajustable selon une direction parallèle aux fils de trame du métier, ce qui permet d'adapter simplement la position des cadres de lisses du dispositif à la largeur effective du tissu en cours de fabrication. Avantageusement, le dispositif est monté coulissant sur une poutre du métier disposée parallèlement aux fils de trame, au moins un tirant solidaire du dispositif étant engagé dans une rainure longitudinale de la poutre, ce qui permet d'immobiliser le boítier du dispositif de l'invention dans son mouvement parallèlement aux fils de trame.
  • Le lien flexible comprend au moins une courroie crantée apte à être entraínée positivement par une poulie crantée actionnée par le moteur. Cet entraínement positif de la courroie assure un positionnement précis des cadres de lisses.
According to advantageous aspects of the invention, the device incorporates one or more of the following characteristics:
  • The flexible link is formed by an upper section connecting upper edges of heald frames and a lower section connecting lower edges of these frames. The division of the flexible link into two sections makes it possible to use the rigidity of the frames on a part of the loop formed by the flexible link, which gives good overall mechanical stability to the device of the invention. In this case, the frames are advantageously connected to the upper and lower sections substantially at the center of their respective upper and lower edges. This aspect of the invention prevents a cantilever from being created at the junction between the frames and the flexible link, hence the dynamic stability of the device, including at high speed.
  • A housing forms a support for return pulleys of the flexible link and for the motor. This housing makes it possible to manufacture a mechanically autonomous device, which facilitates its mounting on a conventional weaving loom. In this case, the housing advantageously comprises at least one guide slide for the frames in their reciprocating movement, these frames being provided to be partially engaged in this slide. In addition, means for adjusting the position of at least one return pulley on the housing can be provided, the adjustment of this position allowing the tension of the flexible link to be adjusted.
  • The position of the device is adjustable in a direction parallel to the weft threads of the loom, which makes it possible to simply adapt the position of the heald frames of the device to the effective width of the fabric during manufacture. Advantageously, the device is slidably mounted on a beam of the loom arranged parallel to the weft threads, at least one tie rod secured to the device being engaged in a longitudinal groove of the beam, which makes it possible to immobilize the housing of the device of the invention in its movement parallel to the weft threads.
  • The flexible link comprises at least one toothed belt capable of being driven positively by a toothed pulley actuated by the motor. This positive drive of the belt ensures precise positioning of the heald frames.

L'invention concerne enfin un métier à tisser équipé d'au moins un dispositif tel que précédemment décrit. Avantageusement, un métier à tisser comprend un dispositif tel que précédemment décrit au niveau de chaque lisière du tissu en cours de fabrication.The invention finally relates to a loom equipped with minus a device as previously described. Advantageously, a weaving loom includes a device such as previously described at each edge of the fabric in manufacturing course.

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 conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une représentation schématique en perspective d'un métier à tisser équipé de deux dispositifs conformes à l'invention ;
  • la figure 2 est une vue de face à plus grande échelle du dispositif identifié avec le détail II à la figure 1 et
  • la figure 3 est une coupe selon la ligne III-III à la figure 2.
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 in accordance with its principle, given only to as an example and made with reference to the accompanying drawings in which:
  • Figure 1 is a schematic perspective representation of a weaving loom equipped with two devices according to the invention;
  • FIG. 2 is a front view on a larger scale of the device identified with detail II in FIG. 1 and
  • FIG. 3 is a section along line III-III in FIG. 2.

Le métier à tisser représenté à la figure 1 comprend plusieurs cadres de lisses 1 disposés parallèlement les uns aux autres et portant des lisses 2 dont les oeillets 3 sont prévus pour guider des fils de chaíne 4.The loom shown in Figure 1 includes several heald frames 1 arranged parallel to each other others and having beams 2, the eyelets 3 of which are provided to guide chain wires 4.

Chaque cadre 1 est commandé, comme cela est montré uniquement pour le premier cadre visible à la figure 1, par des bielles 5 solidaires de leviers de renvoi 6 reliés entre eux par une bielle transversale 7. Un des leviers 6 est attaqué par une bielle de commande 8 dont le déplacement alternatif dans le sens de la flèche F1 est commandé par une ratière 9.Each frame 1 is controlled, as shown only for the first frame visible in FIG. 1, by connecting rods 5 integral with return levers 6 connected together by a transverse connecting rod 7. One of the levers 6 is attacked by a connecting rod control 8 whose reciprocating movement in the direction of arrow F 1 is controlled by a dobby 9.

Les fils de trame sont censés être déplacés, par un mécanisme classique, non représenté, perpendiculairement aux fils de chaíne, comme représenté par la flèche F2.The weft threads are supposed to be moved, by a conventional mechanism, not shown, perpendicular to the warp threads, as shown by the arrow F 2 .

Conformément à l'invention, une poutre 10 est disposée au-dessus de la foule, c'est-à-dire de la zone de croisement des fils de chaíne 4 et des fils de trame, parallèlement à la direction de la flèche F2. Sur cette poutre 10 sont suspendus deux dispositifs 20 et 20', analogues et conformes à l'invention, le dispositif 20 étant plus particulièrement visible aux figures 2 et 3.According to the invention, a beam 10 is arranged above the crowd, that is to say the zone of crossing of the warp threads 4 and the weft threads, parallel to the direction of the arrow F 2 . On this beam 10 are suspended two devices 20 and 20 ′, analogous and in accordance with the invention, the device 20 being more particularly visible in FIGS. 2 and 3.

Le dispositif 20 comprend un boítier 21 monté coulissant sur la poutre 10 grâce à quatre tirants 22 dont les têtes 22a sont engagées dans des rainures concaves 10a et 10b de la poutre 10. Lorsque les écrous 22b associés aux tirants ne sont pas serrés, le dispositif 20 peut coulisser le long de la poutre 10 dans le sens de la flèche F3 qui est parallèle à la flèche F2, alors qu'il est immobilisé lorsque ces écrous 22b sont serrés.The device 20 comprises a housing 21 slidably mounted on the beam 10 by means of four tie rods 22 whose heads 22 a are engaged in concave grooves 10 a and 10 b of the beam 10. When the nuts 22 b associated with the tie rods are not tight, the device 20 can slide along the beam 10 in the direction of the arrow F 3 which is parallel to the arrow F 2 , while it is immobilized when these nuts 22 b are tightened.

Le boítier 21 supporte un moteur électrique 23 qui peut être de tout type connu, mais qui est avantageusement un servomoteur.The housing 21 supports an electric motor 23 which can be of any known type, but which is advantageously a servo motor.

Sur l'arbre de sortie 24 du moteur 23 est montée une poulie crantée 25 autour de laquelle est disposée une courroie crantée 26 dont les deux extrémités 26a et 26b sont respectivement solidaires des bords supérieurs respectifs 27a, et 28a de deux cadres de lisses 27 et 28. Plus précisément, l'extrémité 26a de la courroie 26 est fixée sur le bord supérieur 27a, du cadre 27 grâce à quatre vis 29, alors que l'extrémité 26b de la courroie 26 est fixée sur le bord supérieur du cadre 28 par quatre vis analogues aux vis 29. Bien entendu, d'autres moyens de fixation de la courroie 26 sur les cadres 27 et 28 sont envisageables. La rotation du moteur 23 commande positivement les cadres 27 et 28 grâce à la coopération des crantages complémentaires de la poulie 25 et de la courroie 26.On the output shaft 24 of the motor 23 is mounted a toothed pulley 25 around which is disposed a toothed belt 26 whose two ends 26 a and 26 b are respectively secured to the respective upper edges 27 a , and 28 a of two frames stringers 27 and 28. More specifically, the end 26 a of the belt 26 is fixed to the upper edge 27 a , of the frame 27 by means of four screws 29, while the end 26 b of the belt 26 is fixed to the upper edge of the frame 28 by four screws similar to the screws 29. Of course, other means of fixing the belt 26 to the frames 27 and 28 are conceivable. The rotation of the motor 23 positively controls the frames 27 and 28 thanks to the cooperation of the complementary notches of the pulley 25 and of the belt 26.

Une seconde courroie 30, qui peut être crantée ou non, relie les bords inférieurs respectifs 27b et 28b des cadres 27 et 28 en passant autour d'une poulie de renvoi 31 disposée en partie inférieure du boítier 21. On note respectivement 30a et 30b les extrémités de la courroie 30 solidaires des bords 27b et 28b des cadres 27 et 28 au moyen de vis 29.A second belt 30, which may or may not be notched, connects the respective lower edges 27 b and 28 b of the frames 27 and 28 passing around a return pulley 31 disposed in the lower part of the housing 21. We note respectively 30 a and 30 b the ends of the belt 30 secured to the edges 27 b and 28 b of the frames 27 and 28 by means of screws 29.

Les éléments 26, 27, 28 et 30 forment une boucle fermée comprenant deux parties rigides, 27 et 28, et deux parties flexibles, 26 et 30.Elements 26, 27, 28 and 30 form a closed loop comprising two rigid parts, 27 and 28, and two parts flexible, 26 and 30.

Ainsi, la rotation alternée de la poulie 25 permet d'entraíner alternativement les cadres 27 et 28 selon une direction sensiblement verticale, le mouvement des cadres étant représenté par la flèche F4.Thus, the alternating rotation of the pulley 25 alternately drives the frames 27 and 28 in a substantially vertical direction, the movement of the frames being represented by the arrow F 4 .

Chaque cadre de lisses 27 ou 28 porte plusieurs lisses 32 pourvues chacune d'un oeillet 33 de passage des fils de chaíne 4' situés sur la gauche de la figure 1 et destinés à former la lisière. Le montage des lisses 32 sur les cadres 27 et 28 peut être adapté des techniques connues pour le montage des lisses 2 sur les cadres principaux 1 du métier à tisser.Each heald frame 27 or 28 carries several healds 32 each provided with an eyelet 33 for passing the warp threads 4 'located on the left of Figure 1 and intended to form the edge. The mounting of the beams 32 on the frames 27 and 28 can be adapted from known techniques for mounting beams 2 on the main frames 1 of the loom.

Les extrémités 26a, 26b, 30a et 30b des courroies 26 et 30 sont respectivement solidaires des bords supérieurs 27a, et 28a, et inférieurs 27b et 28b des cadres 27 et 28 dans la partie centrale de ces bords, de sorte qu'il n'existe pas de porte-à-faux entre les cadres 27 et 28 et le lien flexible formé par les courroies 26 et 30.The ends 26 a, 26 b, 30 a and 30 b of the belts 26 and 30 are integral with the upper edges respectively 27a, and 28a, and lower 27 b and 28 b of the frames 27 and 28 in the central part of these edges , so that there is no overhang between the frames 27 and 28 and the flexible link formed by the belts 26 and 30.

Deux poulies de renvoi 34 et 35 permettent de disposer les brins verticaux des courroies 26 et 30 dans des plans parallèles relativement proches, de sorte que les cadres de lisses 27 et 28 se déplacent dans des plans parallèles également proches. Ceci permet d'obtenir une grande compacité du dispositif 20.Two return pulleys 34 and 35 allow the vertical strands of belts 26 and 30 in parallel planes relatively close, so that the heald frames 27 and 28 move in equally close parallel planes. This allows the device 20 to be very compact.

La poulie 31 est monté dans une lumière oblongue 36 du boítier 21, ce qui permet un réglage en tension des courroies 26 et 30 par déplacement de l'axe de la poulie 31 dans la lumière 36.The pulley 31 is mounted in an oblong slot 36 of the case 21, which allows a tension adjustment of the belts 26 and 30 by displacement of the axis of the pulley 31 in the light 36.

Des ouvertures 37 et 38 prévues dans les côtés du boítier 21 forment deux glissières longitudinales dans lesquelles sont respectivement engagés les bords longitudinaux 27c, 28c et 27d, 28d des cadres 27 et 28. Ainsi, le boítier 21 permet de guider les cadres 27 et 28 dans leur mouvement alternatif vertical F4.Openings 37 and 38 provided in the sides of the housing 21 form two longitudinal slides in which the longitudinal edges 27 c , 28 c and 27 d , 28 d of the frames 27 and 28 are respectively engaged. Thus, the housing 21 makes it possible to guide the frames 27 and 28 in their vertical reciprocating movement F 4 .

Grâce à l'invention, le dispositif 20 présente une structure modulaire, compacte et rigide qui peut être installée rapidement sur un métier à tisser avec un réglage aisé lors du délaisage, par coulissement le long de la poutre 10 comme représenté par la flèche F3. Le dispositif de l'invention présente l'avantage particulier qu'il peut être installé sur des métiers à tisser déjà en service par la simple adjonction d'une poutre équivalente à la poutre 10 et de deux mécanismes 20 et 20'.Thanks to the invention, the device 20 has a modular, compact and rigid structure which can be installed quickly on a weaving loom with easy adjustment during time-delaying, by sliding along the beam 10 as shown by the arrow F 3 . The device of the invention has the particular advantage that it can be installed on weaving looms already in service by the simple addition of a beam equivalent to the beam 10 and two mechanisms 20 and 20 '.

En outre, la commande du servomoteur 23 est réalisée indépendamment de la commande générée par le métier à tisser ou la ratière 9, de telle sorte qu'un déphasage peut être obtenu de façon particulièrement simple entre le mouvement de fond de la foule des cadres 1 et le mouvement de foule des lisières, au niveau des cadres 27 et 28. Tous les dispositifs d'entraínement des cames des systèmes à cames classiques ou les arbres du système FR-A-2 685 014 peuvent être supprimés, de sorte que le montage et le démontage des dispositifs 20 et 20' sur le métier est sensiblement plus facile que dans les systèmes connus.In addition, the actuator 23 is controlled regardless of the command generated by the loom or the dobby 9, so that a phase shift can be obtained in a particularly simple way between the bottom movement of the crowd of frames 1 and the crowd movement of the edges, at level of frames 27 and 28. All training devices cams of conventional cam systems or the shafts of the FR-A-2 685 014 can be deleted, so that the assembly and disassembly of devices 20 and 20 'on the loom is significantly easier than in known systems.

Selon une variante non représentée de l'invention, le boítier 21 peut comprendre deux glissières de chaque côté, chaque glissière étant adaptée à recevoir et guider un bord longitudinal d'un cadre 27 ou 28. Ceci permet d'obtenir un guidage individualisé des cadres en translation.According to a variant not shown of the invention, the case 21 can include two slides on each side, each slide being adapted to receive and guide an edge longitudinal of a frame 27 or 28. This makes it possible to obtain a individualized guiding of the frames in translation.

Un métier équipé de dispositifs conformes à l'invention 20 et 20' est plus facile à commander pour un opérateur et plus économique en investissement et en coût de fonctionnement.A profession equipped with devices in accordance with the invention 20 and 20 'is easier to control for an operator and more economical in investment and operating cost.

L'invention a été représentée avec la poutre 10 disposée au-dessus de la foule. Elle est cependant applicable avec une poutre disposée transversalement en partie basse du métier, c'est-à-dire au-dessous de la foule, et supportant des dispositifs analogues aux dispositifs 20 et 20' au-dessus d'elle.The invention has been shown with the beam 10 arranged above the crowd. It is however applicable with a beam arranged transversely in the lower part of the loom, that is to say below the crowd, and supporting devices analogous to devices 20 and 20 'above it.

L'invention a été représentée avec un métier à tisser équipé d'une ratière ; elle est cependant applicable aux métiers de type Jacquard.The invention has been represented with a loom equipped with a dobby; however, it is applicable to Jacquard-type looms.

Claims (10)

Dispositif de formation de la foule pour la réalisation d'une lisière sur un tissu en cours de fabrication sur un métier à tisser, caractérisé en ce qu'il comprend deux cadres (27,28) portant chacun plusieurs lisses (32) et pourvus de bords longitudinaux (27c, 28c, 27d, 28d) et de bords supérieur (27a, 28a) et inférieur (27b, 28b), lesdits cadres étant déplacés, selon un mouvement alternatif vertical (F4) en opposition de phases, par au moins un lien flexible (26, 30) actionné par un moteur électrique (23) et relié auxdits bords supérieurs ou auxdits bords inférieurs.Crowd-forming device for producing a selvedge on a fabric being manufactured on a loom, characterized in that it comprises two frames (27,28) each carrying several healds (32) and provided with longitudinal edges (27 c , 28 c , 27 d , 28 d ) and upper edges (27 a , 28 a ) and lower (27 b , 28 b ), said frames being moved, in a vertical reciprocating movement (F 4 ) in phase opposition, by at least one flexible link (26, 30) actuated by an electric motor (23) and connected to said upper edges or to said lower edges. Dispositif selon la revendication 1, caractérisé en ce que ledit lien flexible est formé par un tronçon supérieur (26) reliant des bords supérieurs (27a, 28a) desdits cadres de lisses (27, 28) et un tronçon inférieur (30) reliant des bords inférieurs (27b, 28b) desdits cadres.Device according to claim 1, characterized in that said flexible link is formed by an upper section (26) connecting upper edges (27 a , 28 a ) of said heald frames (27, 28) and a lower section (30) connecting lower edges ( 27b , 28b ) of said frames. Dispositif selon la revendication 2, caractérisé en ce que lesdits cadres (27, 28) sont reliés auxdits tronçons supérieur et inférieur sensiblement au centre desdits bords supérieurs (27a, 28a) et inférieurs (27b, 28b) respectifs.Device according to claim 2, characterized in that said frames (27, 28) are connected to said upper and lower sections substantially at the center of said respective upper (27 a , 28 a ) and lower (27 b , 28 b ) edges. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comprend un boítier (21) formant support pour des poulies de renvoi (25, 31, 34, 35) dudit lien flexible (26, 30) et pour ledit moteur.Device according to one of the preceding claims, characterized in that it comprises a housing (21) forming support for return pulleys (25, 31, 34, 35) of said link flexible (26, 30) and for said motor. Dispositif selon la revendication 4, caractérisé en ce que ledit boítier (21) comprend au moins une glissière (37, 38) de guidage desdits cadres (27, 28) dans leur mouvement alternatif, lesdits cadres étant prévus pour être partiellement engagés (27c, 27d, 28c, 28d) dans ladite glissière.Device according to claim 4, characterized in that said housing (21) comprises at least one slide (37, 38) for guiding said frames (27, 28) in their reciprocating movement, said frames being provided to be partially engaged (27 c , 27 d , 28 c , 28 d ) in said slide. Dispositif selon l'une des revendications 4 ou 5, caractérisé en ce qu'il comprend des moyens (36) de réglage de la position d'au moins une poulie de renvoi (31) sur ledit boítier (21), le réglage de ladite position permettant le réglage de la tension dudit lien flexible (26, 30).Device according to one of claims 4 or 5, characterized in that it comprises means (36) for adjusting the position of at least one return pulley (31) on said housing (21), the adjustment of said position allowing the adjusting the tension of said flexible link (26, 30). Dispositif selon l'une des revendications précédentes, caractérisé en ce que la position dudit dispositif (20, 20') est ajustable selon une direction (F3) parallèle aux fils de trame (F2) dudit métier.Device according to one of the preceding claims, characterized in that the position of said device (20, 20 ') is adjustable in a direction (F 3 ) parallel to the weft threads (F 2 ) of said loom. Dispositif selon la revendication 7, caractérisé en ce que ledit dispositif (20, 20') est monté coulissant (F3) sur une poutre (10) dudit métier disposée parallèlement auxdits fils de trame (F2), au moins un tirant (22) solidaire dudit dispositif étant engagé dans une rainure longitudinale (10a, 10b) de ladite poutre.Device according to Claim 7, characterized in that the said device (20, 20 ') is slidably mounted (F 3 ) on a beam (10) of the loom arranged parallel to the said weft threads (F 2 ), at least one tie rod (22 ) integral with said device being engaged in a longitudinal groove (10 a , 10 b ) of said beam. Dispositif selon l'une des revendications précédentes, caractérisé en ce que ledit lien flexible comprend au moins une courroie crantée (26) apte à être entraínée positivement par une poulie crantée (25) actionnée par ledit moteur (23).Device according to one of the preceding claims, characterized in that said flexible link comprises at least one toothed belt (26) capable of being positively driven by a toothed pulley (25) actuated by said motor (23). Métier à tisser, caractérisé en ce qu'il est équipé d'au moins un dispositif de formation de la foule (20, 20') selon l'une des revendications précédentes.Loom, characterized in that it is equipped at least one crowd formation device (20, 20 ') according to one of the preceding claims.
EP20000420103 1999-05-27 2000-05-23 Selvedge shedding device and weaving loom with such a device Expired - Lifetime EP1069219B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9906907A FR2794141B1 (en) 1999-05-27 1999-05-27 DEVICE FOR FORMING A CROWD FOR THE PRODUCTION OF A EDGE AND A WEAVING EQUIPMENT EQUIPPED WITH SUCH A DEVICE
FR9906907 1999-05-27

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EP1069219A1 true EP1069219A1 (en) 2001-01-17
EP1069219B1 EP1069219B1 (en) 2005-07-20

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DE (1) DE60021313T2 (en)
FR (1) FR2794141B1 (en)

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BE1017768A3 (en) * 2007-09-26 2009-06-02 Toyota Jidoshokki Kk Training device using the crowd edge son in a loom.

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
FR2826671B1 (en) * 2001-06-29 2003-09-12 Staubli Lyon DEVICE FOR FORMING A CROWD ON A JACQUARD-TYPE WEAVING MATERIAL
ITMI20022044A1 (en) * 2002-09-26 2004-03-27 Promatech Spa FALSE CIMOSA BINDING DEVICE IN TEXTILE FRAMES

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EP0393467A1 (en) * 1989-04-21 1990-10-24 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Movable device to carry out the slotted leno heald weave on selvedges of fabrics formed on shuttleless looms
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WO1996038608A1 (en) * 1995-05-29 1996-12-05 Picanol N.V. Selvage-forming device for a mechanical loom
EP0750061A1 (en) * 1995-06-20 1996-12-27 Icbt Diederichs Device to form a leno selvedge on looms
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WO1996038608A1 (en) * 1995-05-29 1996-12-05 Picanol N.V. Selvage-forming device for a mechanical loom
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BE1017768A3 (en) * 2007-09-26 2009-06-02 Toyota Jidoshokki Kk Training device using the crowd edge son in a loom.

Also Published As

Publication number Publication date
FR2794141B1 (en) 2001-07-13
FR2794141A1 (en) 2000-12-01
DE60021313D1 (en) 2005-08-25
DE60021313T2 (en) 2006-05-24
EP1069219B1 (en) 2005-07-20

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