EP1382725A1 - Rotary dobby for weaving looms and loom with such a dobby - Google Patents

Rotary dobby for weaving looms and loom with such a dobby Download PDF

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Publication number
EP1382725A1
EP1382725A1 EP03356112A EP03356112A EP1382725A1 EP 1382725 A1 EP1382725 A1 EP 1382725A1 EP 03356112 A EP03356112 A EP 03356112A EP 03356112 A EP03356112 A EP 03356112A EP 1382725 A1 EP1382725 A1 EP 1382725A1
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EP
European Patent Office
Prior art keywords
dobby
levers
coupling member
selector
lever
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.)
Granted
Application number
EP03356112A
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German (de)
French (fr)
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EP1382725B1 (en
Inventor
Jean-Pierre Pages
Patrick Iltis
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Staubli Faverges SCA
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Staubli Faverges SCA
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Publication of EP1382725A1 publication Critical patent/EP1382725A1/en
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Publication of EP1382725B1 publication Critical patent/EP1382725B1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams

Definitions

  • the invention relates to a rotary dobby for the control of heald frames mounted on a loom and a loom equipped with such a dobby.
  • oscillating linkages In rotating dobbies, vertical movement alternatively smooth frames is provided by oscillating linkages, these sets oscillating being controlled by actuating elements in the form of eccentrics.
  • actuating elements are mounted on a main tree of the dobby that is animated intermittent rotation and, at each stopping of this tree, a reading device controls the securing the actuating element with the shaft to order an oscillating piece according to the drawing or weave to get on the fabric being weaved.
  • FR-A-2 540 524 discloses a rotary dobby in which this selective joining is obtained thanks to a solidarity plate of an eccentric forming actuating element and comprising two notches diametrically opposed to cooperate with the beak of two pivoting levers controlled by a device reading-. It is, moreover, known from FR-A-2 757 884 to use a pivoting selector to activate selectively one or the other of two pivoting levers of the type of those mentioned above. This selector is controlled by an electromagnet and subjected to the action of recall means. FR-A-2 757 882 teaches, meanwhile, provide that, when the pivoting levers are engaged with certain jamming surfaces provided on a plateau, they are out of range of a selector.
  • the mobile assembly forming a selector or actuator comprises a pusher that is used to move one or the other of the pivoting levers against recall efforts to which they are subject.
  • This pusher must therefore be robust enough to ensure this function and the electromagnet that the command must be powerful, which in practice means increasing its size to such an extent that it is not necessarily compatible with the division corresponding to the thickness of the frames of smooth of the trade.
  • the energy needed to control the pusher increases greatly to great speed, which makes it necessary to size accordingly pusher and the electromagnet.
  • the electromagnet associated with the pusher is subject to accelerations and intense vibrations, which reduces its life.
  • the drive levers pivoting against the action of the second means of elastic return is made thanks to the mechanical parts which are dimensioned taking into account their function essentially mechanical, the selector of the device the reading can then be lighter and controlled by a spring and a lower power electromagnet than in the devices of the state of the art.
  • the invention allows to push back the pivoting levers that are not engaged on a passive jamming surface in a configuration where these levers do not interfere with the coupling member and, in this configuration, to operate the reading device to position the selector in front of one or the other of these levers.
  • the selector then has only a passive stop role when the mechanical parts release the pivoting levers. This selector is not subject to vibration, which improves its life.
  • the invention also relates to a loom equipped with a dobby as described above.
  • Such profession is likely to operate at high speed without risk of breakage or premature wear of its device of reading, so that it is more reliable and more economic that the looms of the state of the technical.
  • the dobby shown in Figures 1 and 2 comprises a main shaft 1 rotated intermittent with stop all half-turns.
  • This tree 1 receives a series of bearings in number equal to that of smooth frames or blades of the craft.
  • On each crazy ride went up an eccentric 2 going on laterally by a plateau 3.
  • On each eccentric 2 is crazy climb the opening of a connecting rod 4 whose end free arm attaches to a pivoting arm 5 which ensures, thanks to connecting rods 6a and angle levers 6b, the displacement vertical of the heald frame 6 of the blade envisaged, shown very schematically.
  • the tree 1 Between two eccentric 2 contiguous, the tree 1, provided grooved, carries a drive disk 7 which is solidarity and whose periphery is divided by two radial notches 7a diametrically opposite one to the other. These notches 7a are intended to receive selectively the terminal finger 8a of an articulated pawl 8 on an axis 9 carried by the lateral plate 3 of the eccentric 2 corresponding.
  • a spring 10 tends to constantly remind the finger 8a of the ratchet 8 direction of the tree 1.
  • each pawl 8 The control of each pawl 8 is ensured by means of two pivoting levers 11 hinged on fixed axes 12 oriented parallel to the shaft 1.
  • Each lever 11 has a generally angled profile, with two branches 111 and 112 oriented substantially at 90 ° one compared to each other.
  • each lever 11 has a spout 113 capable of cooperating with a passive jamming surface 31 and a surface of active jamming 32 formed on the periphery of the plate 3.
  • the tray 3 can be immobilized in two positions, separated by a rotation 180 ° of the plate 3, depending on whether the nozzle 113 shown in FIG. left of FIG. 1 cooperates with the surface 31, whereas the spout 113 shown on the right cooperates with the surface 32, as shown in Figure 1, or the spout 113 shown on the left cooperates with the surface 32 while the beak 113 shown to the right cooperates with the surface 31.
  • levers 15 are articulated around the axes 12 and are each provided with a cross 151 disposed at the end of a first branch 152 of the levers 15.
  • the cross-members 151 extend according to a direction generally parallel to the longitudinal axis X-X ' of the tree 1.
  • Each lever 11 is urged by a spring of traction 13 whose end is fixed on a bar latching 14, the levers 11 tending, under the effect of the effort due to the springs 13, to bring their respective beaks 113 of the shaft 1. As far as the lever 11 located on the ratchet 8 side, the spring 13 tends to push the spout 113 towards the pawl 8 and thus release the finger 8a of the notch 7a nearest.
  • Each lever 15 is also provided with a second branch 153 whose free end carries a roller 154 intended to cooperate with a control cam 16 set on the shaft 1.
  • the cam 16 is provided with two notches diametrically opposite engagement 161 pebbles 154.
  • the rotation of the shaft 1 has the effect of moving the cross members 151 towards the branches 111 of the levers 11 and to rotate the levers 11 which are not already engaged with a surface 31, in the direction of the arrow F 3 in Figure 1.
  • levers 11, including bins 113 already engaged with jamming surfaces 31, are out of reach of a selector 201 belonging to the device of the dobby 20, in accordance with the technical education of FR-A-2 757 882. In addition, in this position, these levers are also out of reach sleepers 151.
  • cross members 151 play the role of pushers who come, every half-turn of the tree 1 and simultaneously, push the branches 111 of the levers 11 and to clear them from the selectors 201.
  • levers 15 are independent of selector 201 to which they do not transmit directly from solicitations.
  • the reading device 20 is mounted between the latching bars 14 and comprises the selector 201 which is articulated around a fixed axis 202 and pivotable represented by the double arrow F 4 in FIG. 1.
  • the pivoting of the selector 201 is controlled by an electromagnet 203, fixedly mounted on a frame 204 from which the axis 202 extends, and a return spring 205.
  • the selector 201 can be moved by the electromagnet 203 when the cross members 151 exert a thrust force F 5 on the branches 111 in the direction of the shaft 1, this effort resulting in the pivoting of the levers 11 in the direction of the arrows F 3 and having the effect of spreading the notches 113 of the wedging surfaces 32.
  • the selector 201 can be tilted, as shown by the arrow F 4 , between a locking position of the lever 11 whose spout 113 is opposite the pawl 8 and a neutral position vis-à-vis the branch 111 of the other lever which is out of range of the selector 201 being tilted under the effect of the support of its spout 113 on the surface 31.
  • the single end 201a of the selector 201 can block one or the other of the levers 11.
  • levers 15 are exerted by levers 15 and, more specifically, by sleepers 151, while the selector 201 simply opposes the pivoting of one either of the levers 11 under the effect of the springs 13.
  • these sleepers may extend over substantially the entire width of the dobby, that is to say the length of the tree 1, being articulated on the fixed axes 12, preferably at each end of the crosspieces 151.
  • crossings 151 have a leveling function of the levers 11 of the dobby that they cross simultaneously for all the blades.
  • the elements similar to those of the first embodiment bear identical references.
  • This embodiment differs from the previous one in that the locking member is not a pawl but a pair of locks 108 and 108 'hinged on pins 109a and 109'a integral with the plate 3 and comprising heel-forming limbs.
  • 108a, respectively 108 ' is capable of interacting with the notches 107 and 107' is provided on a disk 107 of the same type as the disk 7 of the first embodiment.
  • the locks 108 and 108 ' are each subjected to the action of a spring 110, respectively 110'.
  • these latches 108 and 108 ' are controlled by levers 11 subjected to the action of sleepers 151 belonging to levers 15 similar to those of the first embodiment.
  • the selector 201 is subjected to the action of a spring 205 and an electromagnet 203 and its movement F 4 is limited by a stop 206.
  • At least some of the branches 112 levers 11 are each surrounded by a shirt made of synthetic material 114, the material of which is chosen to limit the friction with the elements surrounding the dobby, such as connecting rods 4 or eccentric 2, with which they are reduced clearance.
  • These shirts also allow for very accurate positioning levers between the blades and avoid the use of parts additional, such as guide rakes. This makes it possible to improve the life of the levers 11 and neighboring elements.
  • Shirts 114 can be made polyamide or polyacetal, optionally loaded.
  • the cross members 151 are in the lower position where it exerts on the right lever 11 a thrust force F 5 .
  • the sleepers of the second embodiment are in the upper position and do not interfere with the levers.
  • the locks 108 and 108 ' may also conform to the technical education of FR-A-2 802 218.
  • control levers 15 can be positive, for example at average of desmodromic cams, which makes it possible to envisage suppression of springs 17.

Abstract

The rotating dobby for a loom incorporates a mechanical component (15) to act on at least one lever (11) in a shifting movement (F3), while its hook (113) is disengaged from the wedge blocking surface (31), on meeting the action from the elastic retainer spring (13). It does not interfere with the angular shift movement of the selector (201).

Description

L'invention a trait à une ratière rotative pour la commande des cadres de lisses montés sur un métier à tisser et à un métier à tisser équipé d'une telle ratière.The invention relates to a rotary dobby for the control of heald frames mounted on a loom and a loom equipped with such a dobby.

Dans les ratières rotatives, le mouvement vertical alternatif des cadres de lisses est assuré par des ensembles bielles-leviers oscillants, ces ensembles oscillants étant commandés par des éléments d'actionnement en forme d'excentriques. Ces éléments d'actionnement sont montés sur un arbre principal de la ratière qui est animé d'un mouvement en rotation intermittent et, lors de chaque arrêt de cet arbre, un dispositif de lisage commande la solidarisation de l'élément d'actionnement avec l'arbre pour commander une pièce oscillante en fonction du dessin ou armure à obtenir sur le tissu en cours de tissage.In rotating dobbies, vertical movement alternatively smooth frames is provided by oscillating linkages, these sets oscillating being controlled by actuating elements in the form of eccentrics. These actuating elements are mounted on a main tree of the dobby that is animated intermittent rotation and, at each stopping of this tree, a reading device controls the securing the actuating element with the shaft to order an oscillating piece according to the drawing or weave to get on the fabric being weaved.

Par FR-A-2 540 524, on connaít une ratière rotative dans laquelle cette solidarisation sélective est obtenue grâce à un plateau solidaire d'un excentrique formant élément d'actionnement et comprenant deux entailles diamétralement opposées aptes à coopérer avec le bec de deux leviers pivotants commandés par un dispositif de lisage. Il est, par ailleurs, connu de FR-A-2 757 884 d'utiliser un sélecteur pivotant destiné à actionner sélectivement l'un ou l'autre de deux leviers pivotants du type de ceux mentionnés ci-dessus. Ce sélecteur est commandé grâce à un électro-aimant et soumis à l'action de moyens de rappel. FR-A-2 757 882 enseigne, quant à lui, de prévoir que, lorsque les leviers pivotants sont en prise avec certaines surfaces de coincement prévues sur un plateau, ils sont hors de portée d'un sélecteur.FR-A-2 540 524 discloses a rotary dobby in which this selective joining is obtained thanks to a solidarity plate of an eccentric forming actuating element and comprising two notches diametrically opposed to cooperate with the beak of two pivoting levers controlled by a device reading-. It is, moreover, known from FR-A-2 757 884 to use a pivoting selector to activate selectively one or the other of two pivoting levers of the type of those mentioned above. This selector is controlled by an electromagnet and subjected to the action of recall means. FR-A-2 757 882 teaches, meanwhile, provide that, when the pivoting levers are engaged with certain jamming surfaces provided on a plateau, they are out of range of a selector.

Dans les dispositifs connus, notamment de FR-A- 2 757 882 et FR-A-2 757 884, l'ensemble mobile formant sélecteur ou actionneur comprend un poussoir qui est utilisé pour déplacer l'un ou l'autre des leviers pivotants à l'encontre d'efforts de rappel auxquels ils sont soumis. Ce poussoir doit donc être suffisamment robuste pour assurer cette fonction et l'électro-aimant qui le commande doit être puissant, ce qui revient en pratique à augmenter sa taille à un point tel qu'elle n'est pas nécessairement compatible avec la division correspondant à l'épaisseur des cadres de lisses du métier. En outre, l'énergie nécessaire pour commander le poussoir augmente considérablement à grande vitesse, ce qui impose de dimensionner en conséquence ce poussoir et l'électro-aimant. Enfin, l'électro-aimant associé au poussoir est soumis à des accélérations et à des vibrations intenses, ce qui réduit sa durée de vie.In known devices, in particular FR-A-2,757 882 and FR-A-2 757 884, the mobile assembly forming a selector or actuator comprises a pusher that is used to move one or the other of the pivoting levers against recall efforts to which they are subject. This pusher must therefore be robust enough to ensure this function and the electromagnet that the command must be powerful, which in practice means increasing its size to such an extent that it is not necessarily compatible with the division corresponding to the thickness of the frames of smooth of the trade. In addition, the energy needed to control the pusher increases greatly to great speed, which makes it necessary to size accordingly pusher and the electromagnet. Finally, the electromagnet associated with the pusher is subject to accelerations and intense vibrations, which reduces its life.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un nouvel arrangement qui permet de moins solliciter mécaniquement le poussoir du dispositif de lisage et l'électro-aimant associé, tout en assurant un fonctionnement sécurisé de la ratière.It is to these disadvantages that more particularly remedy the invention by proposing a new arrangement that allows less solicit mechanically the pusher of the reading device and the associated electromagnet, while ensuring safe operation of the dobby.

Dans cet esprit, l'invention concerne une ratière rotative pour métier à tisser qui comprend, au niveau de chacune de ses lames :

  • une pièce oscillante attelée à un cadre de lisse et associée à un élément d'actionnement monté fou sur un arbre principal de cette ratière,
  • un organe mobile d'accouplement porté par l'élément d'actionnement, cet organe mobile étant soumis à des premiers moyens élastiques pour opérer la liaison angulaire de l'élément d'actionnement avec un disque solidaire de l'arbre principal, et
  • la commande dudit organe mobile d'accouplement étant assurée à l'aide de deux leviers pivotants globalement en forme d'équerre soumis, d'une part à l'action d'un dispositif de lisage et, d'autre part à celle de seconds moyens élastiques qui tendent à engager le bec prévu sur chaque levier pivotant soit avec une surface de coincement prévue à l'opposée de l'organe mobile d'accouplement sur l'élément d'actionnement soit avec l'organe mobile d'accouplement, auquel cas l'organe mobile d'accouplement est commandé au désaccouplement de l'élément d'actionnement par rapport au disque, alors que, lorsqu'un levier est en engagement avec la surface de coincement, il est hors de portée d'un sélecteur appartenant au dispositif de lisage, ce sélecteur étant pourvu d'une extrémité apte à bloquer alternativement le pivotement de l'un ou l'autre des leviers en équerre,
caractérisée en ce que cette ratière comprend, en outre, des organes mécaniques aptes à déplacer au moins un levier, dont le bec n'est pas en engagement avec la surface de coincement, à l'encontre de l'action des seconds moyens élastiques, de telle sorte que ce levier n'interfère pas avec le déplacement angulaire du sélecteur précité.In this spirit, the invention relates to a rotary dobby for a loom which comprises, at the level of each of its blades:
  • an oscillating piece coupled to a smooth frame and associated with an actuating element mounted idly on a main shaft of this dobby,
  • a movable coupling member carried by the actuating element, said movable member being subjected to first resilient means for effecting the angular connection of the actuating element with a disc integral with the main shaft, and
  • the control of said movable coupling member being ensured by means of two generally square-shaped pivoting levers subjected, on the one hand, to the action of a reading device and, on the other hand, to that of second resilient means which tend to engage the nose provided on each pivoting lever is with a wedging surface provided on the opposite side of the movable coupling member on the actuating element or with the movable coupling member, to which case the movable coupling member is controlled uncoupling of the actuating element relative to the disc, whereas when a lever is in engagement with the wedging surface, it is out of range of a selector belonging to to the reading device, this selector being provided with an end capable of alternately blocking the pivoting of one or the other of the levers at right angle,
characterized in that said dobby further comprises mechanical members adapted to move at least one lever, the beak of which is not in engagement with the wedging surface, against the action of the second elastic means, so that this lever does not interfere with the angular displacement of the aforementioned selector.

Grâce à l'invention, l'entraínement des leviers pivotants à l'encontre de l'action des seconds moyens de rappel élastiques est effectué grâce aux organes mécaniques qui sont dimensionnés en tenant compte de leur fonction essentiellement mécanique, le sélecteur du dispositif de lisage pouvant alors être plus léger et commandé par un ressort et un électro-aimant de puissance plus faible que dans les dispositifs de l'état de la technique. L'invention permet de repousser les leviers pivotants qui ne sont pas engagés sur une surface de coincement passif dans une configuration où ces leviers n'interfèrent pas avec l'organe d'accouplement et, dans cette configuration, d'actionner le dispositif de lisage pour positionner le sélecteur en face de l'un ou l'autre de ces leviers. Le sélecteur n'a alors qu'un rôle de butée passive lorsque les organes mécaniques libèrent les leviers pivotants. Ce sélecteur n'est pas soumis à des vibrations, ce qui améliore sa durée de vie.Thanks to the invention, the drive levers pivoting against the action of the second means of elastic return is made thanks to the mechanical parts which are dimensioned taking into account their function essentially mechanical, the selector of the device the reading can then be lighter and controlled by a spring and a lower power electromagnet than in the devices of the state of the art. The invention allows to push back the pivoting levers that are not engaged on a passive jamming surface in a configuration where these levers do not interfere with the coupling member and, in this configuration, to operate the reading device to position the selector in front of one or the other of these levers. The selector then has only a passive stop role when the mechanical parts release the pivoting levers. This selector is not subject to vibration, which improves its life.

Selon des aspects avantageux mais non obligatoires de l'invention, cette ratière incorpore une ou plusieurs des caractéristiques des revendications 2 à 9.According to advantageous but not compulsory aspects of the invention, this dobby incorporates one or more of features of claims 2 to 9.

L'invention concerne également un métier à tisser équipé d'une ratière telle que précédemment décrite. Un tel métier est susceptible de fonctionner à haute vitesse, sans risque de rupture ou d'usure prématurée de son dispositif de lisage, de telle sorte qu'il est plus fiable et plus économique que les métiers à tisser de l'état de la technique.The invention also relates to a loom equipped with a dobby as described above. Such profession is likely to operate at high speed without risk of breakage or premature wear of its device of reading, so that it is more reliable and more economic that the looms of the state of the technical.

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

  • la figure 1 est une coupe transversale schématique d'une ratière conforme à un premier mode de réalisation de l'invention ;
  • la figure 2 est une coupe transversale de la ratière de la figure 1 dans un plan parallèle à celui de la figure 1 et
  • la figure 3 est une vue analogue à la figure 1 pour une ratière 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 dobby in accordance with its principle, given solely by way of example and made with reference to the accompanying drawings in which:
  • Figure 1 is a schematic cross section of a dobby according to a first embodiment of the invention;
  • FIG. 2 is a cross-section of the dobby of FIG. 1 in a plane parallel to that of FIG.
  • Figure 3 is a view similar to Figure 1 for a dobby according to a second embodiment of the invention.

La ratière représentée aux figures 1 et 2 comprend un arbre principal 1 animé d'un mouvement de rotation intermittent avec arrêt tous les demi-tours. Cet arbre 1 reçoit une série de roulements en nombre égal à celui des cadres de lisse ou des lames du métier. Sur chaque roulement est monté fou un excentrique 2 se prolongeant latéralement par un plateau 3. Sur chaque excentrique 2 est montée folle l'ouverture d'une bielle 4 dont l'extrémité libre s'attèle à un bras pivotant 5 qui assure, grâce à des bielles 6a et des leviers équerres 6b, le déplacement vertical du cadre de lisses 6 de la lame envisagée, représentée de façon très schématique.The dobby shown in Figures 1 and 2 comprises a main shaft 1 rotated intermittent with stop all half-turns. This tree 1 receives a series of bearings in number equal to that of smooth frames or blades of the craft. On each crazy ride went up an eccentric 2 going on laterally by a plateau 3. On each eccentric 2 is crazy climb the opening of a connecting rod 4 whose end free arm attaches to a pivoting arm 5 which ensures, thanks to connecting rods 6a and angle levers 6b, the displacement vertical of the heald frame 6 of the blade envisaged, shown very schematically.

Entre deux excentriques 2 contigus, l'arbre 1, prévu cannelé, porte un disque d'entraínement 7 qui lui est solidaire et dont la périphérie est découpée de deux encoches radiales 7a diamétralement opposées l'une à l'autre. Ces encoches 7a sont destinées à recevoir sélectivement le doigt terminal 8a d'un cliquet 8 articulé sur un axe 9 porté par le plateau latéral 3 de l'excentrique 2 correspondant. Un ressort 10 tend à rappeler en permanence le doigt 8a du cliquet 8 en direction de l'arbre 1.Between two eccentric 2 contiguous, the tree 1, provided grooved, carries a drive disk 7 which is solidarity and whose periphery is divided by two radial notches 7a diametrically opposite one to the other. These notches 7a are intended to receive selectively the terminal finger 8a of an articulated pawl 8 on an axis 9 carried by the lateral plate 3 of the eccentric 2 corresponding. A spring 10 tends to constantly remind the finger 8a of the ratchet 8 direction of the tree 1.

La commande de chaque cliquet 8 est assurée à l'aide de deux leviers pivotants 11 portés à articulation sur des axes fixes 12 orientés parallèlement à l'arbre 1. Chaque levier 11 présente un profil globalement en équerre, avec deux branches 111 et 112 orientées sensiblement à 90° l'une par rapport à l'autre.The control of each pawl 8 is ensured by means of two pivoting levers 11 hinged on fixed axes 12 oriented parallel to the shaft 1. Each lever 11 has a generally angled profile, with two branches 111 and 112 oriented substantially at 90 ° one compared to each other.

A l'extrémité de sa branche 112, chaque levier 11 présente un bec 113 susceptible de coopérer avec une surface de coincement passif 31 et une surface de coincement actif 32 ménagées à la périphérie du plateau 3. Grâce aux becs 113 et aux surfaces de coincement passif 31 et de coincement actif 32, le plateau 3 peut être immobilisé dans deux positions, séparées par une rotation de 180° du plateau 3, selon que le bec 113 représenté à gauche de la figure 1 coopère avec la surface 31, alors que le bec 113 représenté à droite coopère avec la surface 32, comme représenté à la figure 1, ou que le bec 113 représenté à gauche coopère avec la surface 32 alors que le bec 113 représenté à droite coopère avec la surface 31.At the end of its branch 112, each lever 11 has a spout 113 capable of cooperating with a passive jamming surface 31 and a surface of active jamming 32 formed on the periphery of the plate 3. With nozzles 113 and passive jamming surfaces 31 and active jamming 32, the tray 3 can be immobilized in two positions, separated by a rotation 180 ° of the plate 3, depending on whether the nozzle 113 shown in FIG. left of FIG. 1 cooperates with the surface 31, whereas the spout 113 shown on the right cooperates with the surface 32, as shown in Figure 1, or the spout 113 shown on the left cooperates with the surface 32 while the beak 113 shown to the right cooperates with the surface 31.

Conformément à l'invention, des leviers 15 sont articulés autour des axes 12 et sont chacun pourvus d'une traverse 151 disposée à l'extrémité d'une première branche 152 des leviers 15. Les traverses 151 s'étendent selon une direction globalement parallèle à l'axe longitudinal X-X' de l'arbre 1.According to the invention, levers 15 are articulated around the axes 12 and are each provided with a cross 151 disposed at the end of a first branch 152 of the levers 15. The cross-members 151 extend according to a direction generally parallel to the longitudinal axis X-X ' of the tree 1.

En l'absence d'action des traverses 151, c'est-à-dire lorsque les traverses 151 sont en position haute, les ressorts 13 tendent, lors de chaque arrêt des surfaces de coincement 31 et 32 du plateau 3 en vis-à-vis des becs 113, à engager ces becs en coopération avec la surface de coincement 32 en forme d'entaille, ce qui a pour effet simultané d'immobiliser angulairement le plateau et, avec lui, l'excentrique 2 et la bielle 4, et de commander le cliquet 8 au désaccouplement, c'est-à-dire au retrait de son doigt 8a hors de l'encoche 7a dans laquelle il était introduit. Ceci constitue un coincement « actif » du plateau 3 par rapport au levier 11.In the absence of action of the cross members 151, that is to say when the cross members 151 are in the high position, the springs 13 tend, at each stop surfaces of wedging 31 and 32 of the plate 3 vis-à-vis the nozzles 113, to engage these beaks in cooperation with the surface of wedge 32 in the form of a notch, which has the effect simultaneously to immobilize the plate and, with him, the eccentric 2 and the rod 4, and to control the ratchet 8 at the time of uncoupling, that is at the withdrawal of his finger 8a out of the notch 7a in which he was introduced. This constitutes an "active" jamming of the plateau 3 with respect to the lever 11.

A l'inverse, le coincement du plateau 3 par un levier 11, tel qu'il résulte de la coopération des éléments 31 et 113, est « passif » en ce sens qu'il est élastique au point d'être vaincu lors de chaque démarrage de l'arbre 1.Conversely, the wedging of the plate 3 by a lever 11, as a result of the cooperation of elements 31 and 113, is "passive" in that it is elastic in to be defeated at each start of the tree 1.

Chaque levier 11 est sollicité par un ressort de traction 13 dont une extrémité est fixée sur une barre d'accrochage 14, les leviers 11 ayant tendance, sous l'effet de l'effort dû aux ressorts 13, à rapprocher leurs becs respectifs 113 de l'arbre 1. Pour ce qui concerne le levier 11 situé du côté du cliquet 8, le ressort 13 tend à pousser le bec 113 vers le cliquet 8 et à dégager ainsi le doigt 8a de l'encoche 7a la plus proche. Each lever 11 is urged by a spring of traction 13 whose end is fixed on a bar latching 14, the levers 11 tending, under the effect of the effort due to the springs 13, to bring their respective beaks 113 of the shaft 1. As far as the lever 11 located on the ratchet 8 side, the spring 13 tends to push the spout 113 towards the pawl 8 and thus release the finger 8a of the notch 7a nearest.

Chaque levier 15 est également pourvu d'une seconde branche 153 dont l'extrémité libre porte un galet 154 destiné à coopérer avec une came de commande 16 calée sur l'arbre 1. La came 16 est pourvue de deux encoches diamétralement opposées 161 d'engagement des galets 154.Each lever 15 is also provided with a second branch 153 whose free end carries a roller 154 intended to cooperate with a control cam 16 set on the shaft 1. The cam 16 is provided with two notches diametrically opposite engagement 161 pebbles 154.

Lors de la rotation de la came 16 qui est concomitante à la rotation de l'arbre 1, les galets 154 sont éjectés des encoches 161 et les leviers 15 pivotent dans le sens des flèches F1 à la figure 2. Ce pivotement a lieu à l'encontre d'un effort de rappel élastique F2 exercé par des ressorts de rappel 17 en appui sur des butée fixe 18.During rotation of the cam 16 which is concomitant with the rotation of the shaft 1, the rollers 154 are ejected from the notches 161 and the levers 15 pivot in the direction of the arrows F 1 in FIG. 2. This pivoting takes place at against an elastic return force F 2 exerted by return springs 17 bearing on fixed stops 18.

Ainsi, la rotation de l'arbre 1 a pour effet de déplacer les traverses 151 en direction des branches 111 des leviers 11 et de faire pivoter les leviers 11 qui ne sont pas déjà en prise avec une surface 31, dans le sens de la flèche F3 à la figure 1.Thus, the rotation of the shaft 1 has the effect of moving the cross members 151 towards the branches 111 of the levers 11 and to rotate the levers 11 which are not already engaged with a surface 31, in the direction of the arrow F 3 in Figure 1.

Il est a noter que les leviers 11, dont les bacs 113 sont déjà en prise avec des surfaces de coincement 31, sont hors de portée d'un sélecteur 201 appartenant au dispositif de lisage 20 de la ratière, ceci conformément à l'enseignement technique de FR-A-2 757 882. En outre, dans cette position, ces leviers sont également hors de portée des traverses 151.It should be noted that levers 11, including bins 113 already engaged with jamming surfaces 31, are out of reach of a selector 201 belonging to the device of the dobby 20, in accordance with the technical education of FR-A-2 757 882. In addition, in this position, these levers are also out of reach sleepers 151.

Ainsi, les traverses 151 jouent le rôle de poussoirs qui viennent, à chaque demi-tour de l'arbre 1 et simultanément, pousser les branches 111 des leviers 11 et les dégager des sélecteurs 201.Thus, the cross members 151 play the role of pushers who come, every half-turn of the tree 1 and simultaneously, push the branches 111 of the levers 11 and to clear them from the selectors 201.

Il est à noter que les leviers 15 sont indépendants du sélecteur 201 auquel ils ne transmettent pas directement de sollicitations.It should be noted that the levers 15 are independent of selector 201 to which they do not transmit directly from solicitations.

Lorsqu'un excentrique 2 est entraíné grâce au cliquet 8, les traverses 151 viennent exercer un effort F5 de déplacement des deux leviers 11 associés, sur leurs branches 111 respectives. When an eccentric 2 is driven by the pawl 8, the cross members 151 exert a force F 5 of movement of the two levers 11 associated on their respective branches 111.

Le dispositif de lisage 20 est monté entre les barres d'accrochage 14 et comprend le sélecteur 201 qui est articulé autour d'un axe fixe 202 et susceptible d'un pivotement représenté par la double flèche F4 à la figure 1. Le pivotement du sélecteur 201 est commandé grâce à un électro-aimant 203, monté fixe sur un bâti 204 à partir duquel s'étend l'axe 202, et à un ressort de rappel 205.The reading device 20 is mounted between the latching bars 14 and comprises the selector 201 which is articulated around a fixed axis 202 and pivotable represented by the double arrow F 4 in FIG. 1. The pivoting of the selector 201 is controlled by an electromagnet 203, fixedly mounted on a frame 204 from which the axis 202 extends, and a return spring 205.

Compte tenu de la fonction des traverses 151, le sélecteur 201 peut être déplacé par l'électro-aimant 203 lorsque les traverses 151 exercent un effort F5 de poussée sur les branches 111 en direction de l'arbre 1, cet effort résultant dans le pivotement des leviers 11 dans le sens des flèches F3 et ayant pour conséquence d'écarter les becs 113 des surfaces de coincement 32. Dans cette configuration représentée à la figure 1, le sélecteur 201 peut être basculé, comme représenté par la flèche F4, entre une position de blocage du levier 11 dont le bec 113 est en regard du cliquet 8 et une position neutre en vis-à-vis de la branche 111 de l'autre levier qui est hors de portée du sélecteur 201 en étant basculé sous l'effet de l'appui de son bec 113 sur la surface 31.Given the function of the cross members 151, the selector 201 can be moved by the electromagnet 203 when the cross members 151 exert a thrust force F 5 on the branches 111 in the direction of the shaft 1, this effort resulting in the pivoting of the levers 11 in the direction of the arrows F 3 and having the effect of spreading the notches 113 of the wedging surfaces 32. In this configuration shown in Figure 1, the selector 201 can be tilted, as shown by the arrow F 4 , between a locking position of the lever 11 whose spout 113 is opposite the pawl 8 and a neutral position vis-à-vis the branch 111 of the other lever which is out of range of the selector 201 being tilted under the effect of the support of its spout 113 on the surface 31.

Selon celui des leviers 11 qui est en appui sur la surface 31, l'extrémité unique 201a du sélecteur 201 peut bloquer l'un ou l'autre des leviers 11.According to that of the levers 11 which is in support on the surface 31, the single end 201a of the selector 201 can block one or the other of the levers 11.

Ainsi, l'essentiel des efforts mécaniques de commande du mouvement des leviers 11 est exercé par des leviers 15 et, plus spécifiquement, par les traverses 151, alors que le sélecteur 201 s'oppose simplement au pivotement de l'un ou l'autre des leviers 11 sous l'effet des ressorts 13.Thus, most of the mechanical control efforts the movement of the levers 11 is exerted by levers 15 and, more specifically, by sleepers 151, while the selector 201 simply opposes the pivoting of one either of the levers 11 under the effect of the springs 13.

On note que le mouvement de ces traverses est le même pour toutes les lames de la ratière, de sorte que ces traverses peuvent s'étendre sur sensiblement toute la largeur de la ratière, c'est-à-dire la longueur de l'arbre 1, en étant articulées sur les axes fixes 12, de préférence à chaque extrémité des traverses 151.We note that the movement of these ties is the same for all dobby blades, so these sleepers may extend over substantially the entire width of the dobby, that is to say the length of the tree 1, being articulated on the fixed axes 12, preferably at each end of the crosspieces 151.

Compte tenu de ce qui précède, les traverse 151 ont une fonction de nivelage des leviers 11 de la ratière qu'elles traversent simultanément pour toutes les lames.In view of the above, crossings 151 have a leveling function of the levers 11 of the dobby that they cross simultaneously for all the blades.

Dans le second mode de réalisation de l'invention représenté à la figure 3, les éléments analogues à ceux du premier mode de réalisation portent des références identiques. Ce mode de réalisation diffère du précédent, en ce que l'organe de verrouillage n'est pas un cliquet mais une paire de verrous 108 et 108' articulés sur des axes 109a et 109'a solidaires du plateau 3 et comportant des branches formant talon 108a, respectivement 108' a, aptes à interagir avec des encoches 107a et 107'a prévues sur un disque 107 du même type que le disque 7 du premier mode de réalisation. Les verrous 108 et 108' sont chacun soumis à l'action d'un ressort 110, respectivement 110'. Comme précédemment, ces verrous 108 et 108' sont commandés par des leviers 11 soumis à l'action de traverses 151 appartenant à des leviers 15 analogues à ceux du premier mode de réalisation.In the second embodiment of the invention shown in Figure 3, the elements similar to those of the first embodiment bear identical references. This embodiment differs from the previous one in that the locking member is not a pawl but a pair of locks 108 and 108 'hinged on pins 109a and 109'a integral with the plate 3 and comprising heel-forming limbs. 108a, respectively 108 'is capable of interacting with the notches 107 and 107' is provided on a disk 107 of the same type as the disk 7 of the first embodiment. The locks 108 and 108 'are each subjected to the action of a spring 110, respectively 110'. As before, these latches 108 and 108 'are controlled by levers 11 subjected to the action of sleepers 151 belonging to levers 15 similar to those of the first embodiment.

Le sélecteur 201 est soumis à l'action d'un ressort 205 et d'un électro-aimant 203 et son mouvement F4 est limité par une butée 206.The selector 201 is subjected to the action of a spring 205 and an electromagnet 203 and its movement F 4 is limited by a stop 206.

De façon avantageuse, certaines au moins des branches 112 des leviers 11 sont entourées chacune par une chemise en matière synthétique 114, dont le matériau est choisi pour limiter les frottements vis-à-vis des éléments environnant de la ratière, tels que les bielles 4 ou les excentriques 2, avec lesquels elles sont à jeu réduit. Ces chemises permettent également un positionnement très précis des leviers entre les lames et évitent l'usage de pièces additionnelles, telles que des râteaux de guidage. Ceci permet d'améliorer la durée de vie des leviers 11 et des éléments voisins. Les chemises 114 peuvent être réalisées en polyamide ou en polyacétal, éventuellement chargés.Advantageously, at least some of the branches 112 levers 11 are each surrounded by a shirt made of synthetic material 114, the material of which is chosen to limit the friction with the elements surrounding the dobby, such as connecting rods 4 or eccentric 2, with which they are reduced clearance. These shirts also allow for very accurate positioning levers between the blades and avoid the use of parts additional, such as guide rakes. This makes it possible to improve the life of the levers 11 and neighboring elements. Shirts 114 can be made polyamide or polyacetal, optionally loaded.

Dans la représentation de la figure 1, les traverses 151 sont en position basse où elle exercent sur le levier 11 de droite un effort F5 de poussée. A la figure 3, les traverses du second mode de réalisation sont en position haute et n'interfèrent pas avec les leviers.In the representation of Figure 1, the cross members 151 are in the lower position where it exerts on the right lever 11 a thrust force F 5 . In Figure 3, the sleepers of the second embodiment are in the upper position and do not interfere with the levers.

Selon une variante non représentée de l'invention, les verrous 108 et 108' peuvent également être conformes à l'enseignement technique de FR-A-2 802 218.According to a not shown variant of the invention, the locks 108 and 108 'may also conform to the technical education of FR-A-2 802 218.

Selon une autre variante également non représentée, la commande des leviers 15 peut être positive, par exemple au moyen de cames desmodromiques, ce qui permet d'envisager la suppression des ressorts 17.According to another variant also not shown, the control levers 15 can be positive, for example at average of desmodromic cams, which makes it possible to envisage suppression of springs 17.

Les caractéristiques techniques des différents modes de réalisation envisagés peuvent être combinées entre elles en restant dans le cadre de la présente invention.The technical characteristics of the different modes envisaged embodiments may be combined with each other remaining within the scope of the present invention.

Claims (10)

1. Ratière rotative pour métier à tisser comprenant, au niveau de chacune de ses lames : une pièce oscillante (4) attelée à un cadre de lisses (6) et associée à un élément d'actionnement (2) monté fou sur un arbre principal (1) de ladite ratière, un organe mobile d'accouplement (8 ; 108, 108') porté l'élément d'actionnement, ledit organe mobile étant soumis à des premiers moyens élastiques (10 ; 110, 110') pour opérer la liaison angulaire dudit élément d'actionnement avec un disque (7) solidaire dudit arbre principal, et la commande dudit organe mobile d'accouplement étant assurée à l'aide de deux leviers pivotants (11) globalement en équerre soumis, d'une part, à l'action d'un dispositif de lisage (20) et, d'autre part, à celle de seconds moyens élastiques (13) qui tendent à engager le bec (113) de chaque levier pivotant soit avec une surface de coincement (31) prévue à l'opposée de l'organe mobile d'accouplement sur l'élément d'actionnement, soit avec ledit organe mobile d'accouplement, auquel cas ledit organe mobile d'accouplement (8 ; 108, 108') est commandé au désaccouplement dudit élément d'actionnement (2) par rapport audit disque (7), alors que, lorsqu'un levier (11) est en engagement avec ladite surface de coincement (31), il est hors de portée d'un sélecteur (201) appartenant audit dispositif de lisage, ledit sélecteur étant pourvu d'une extrémité (201a) apte à bloquer alternativement le pivotement de l'un ou l'autre desdits leviers en équerre (11), caractérisée en ce qu'elle comprend, en outre, des organes mécaniques (15) aptes à déplacer (F3) au moins un levier (11) dont le bec (113) n'est pas en engagement avec ladite surface de coincement (31) à l'encontre de l'action desdits seconds moyens élastiques (13), de telle sorte que ledit levier (11) n'interfère pas avec le déplacement angulaire dudit sélecteur (201). 1. Rotary dobby for a loom comprising, at each of its blades: an oscillating piece (4) coupled to a heald frame (6) and associated with an actuating element (2) idly mounted on a main shaft (1) of said dobby, a movable coupling member (8; 108, 108 ') carried on the actuating element, said movable member being subjected to first elastic means (10; 110, 110') for operating the angular connection of said actuating element with a disc (7) secured to said main shaft, and the control of said movable coupling member being ensured by means of two pivoting levers (11) generally at right angle subjected, on the one hand, to the action of a reading device (20) and, on the other hand to that of second resilient means (13) which tend to engage the spout (113) of each pivoting lever with a wedging surface (31) provided on the opposite side of the movable coupling member on the element actuating either with said movable coupling member, in which case said movable coupling member (8; 108,108 ') is controlled to disengage said actuating member (2) from said disc (7), while when a lever (11) is engaged with said wedging surface (31), it is out of range of a selector (201) belonging to said reading device, said selector being provided with a suitable end (201a) alternately blocking the pivoting of one or the other of said right-angle levers (11), characterized in that it further comprises mechanical members (15) capable of displacing (F 3 ) at least one lever (11) whose spout (113) is not in engagement with said wedging surface (31). ) against the action of said second elastic means (13), so that said lever (11) does not interfere with the angular displacement of said selector (201). 2. Ratière selon la revendication 1, caractérisée en ce que lesdits organes mécaniques (15) sont aptes à interagir (F3) simultanément avec tous les leviers (11) de toutes les lames (6) de la ratière qui ne sont pas déjà en engagement avec une surface de coincement (31). 2. Dobby according to claim 1, characterized in that said mechanical members (15) are capable of interacting (F 3 ) simultaneously with all the levers (11) of all the blades (6) of the dobby which are not already in operation. engagement with a jamming surface (31). 3. Ratière selon l'une des revendications précédentes, caractérisée en ce que lesdits organes mécaniques comprennent des traverses (151) s'étendant selon des directions globalement parallèles à l'axe longitudinal (X-X') dudit arbre principal (1). 3. Dobby according to one of the preceding claims, characterized in that said mechanical members comprise crosspieces (151) extending in directions generally parallel to the longitudinal axis (X-X ') of said main shaft (1). 4. Ratière selon l'une des revendications précédentes, caractérisée en ce que ledit organe mobile d'accouplement est un cliquet (8) articulé sur un axe (9) porté par ledit élément d'actionnement (2). 4. Dobby according to one of the preceding claims, characterized in that said movable coupling member is a pawl (8) articulated on an axis (9) carried by said actuating member (2). 5. Ratière selon l'une des revendication 1 à 4, caractérisée en ce que ledit organe mobile d'accouplement est constitué par une paire de verrous (108, 108'), commandés et articulés sur ledit élément d'actionnement (2) . 5. Dobby according to one of claims 1 to 4, characterized in that said movable coupling member is constituted by a pair of locks (108, 108 '), controlled and articulated on said actuating element (2). 6. Ratière selon l'une des revendications précédentes, caractérisée en ce que ledit sélecteur est pivotant (201), commandé par un électro-aimant (203) à l'encontre de l'action de moyens élastiques de rappel (205) et apte à maintenir l'un ou l'autre desdits leviers en position écartée de son bec (113) par rapport audit organe d'accouplement (8, 108, 108'). 6. Dobby according to one of the preceding claims, characterized in that said selector is pivotable (201), controlled by an electromagnet (203) against the action of elastic return means (205) and suitable maintaining one or the other of said levers in a position away from its nose (113) with respect to said coupling member (8, 108, 108 '). 7. Ratière selon l'une des revendications précédentes, caractérisée en ce que lesdits organes mécaniques (15) sont articulés sur des axes (12) confondus avec les axes respectifs d'articulation desdits leviers (11). 7. Dobby according to one of the preceding claims, characterized in that said mechanical members (15) are articulated on axes (12) coinciding with the respective axes of articulation of said levers (11). 8. Ratière selon l'une des revendications précédentes, caractérisée en ce que lesdits organes mécaniques (15) sont commandés par au moins une came (16) entraínée par ledit arbre principal (1), lesdits organes mécaniques étant soumis à l'action (F2) de moyens élastiques (17) de rappel vers une position dégagée par rapport auxdits leviers (11). 8. Dobby according to one of the preceding claims, characterized in that said mechanical members (15) are controlled by at least one cam (16) driven by said main shaft (1), said mechanical members being subjected to the action ( F 2 ) elastic means (17) for returning to a position released relative to said levers (11). 9. Ratière selon l'une des revendications précédentes, caractérisée en ce que l'un au moins desdits leviers (11) est entouré par une chemise (114) en matière synthétique compatible avec le glissement dudit levier par rapport aux éléments voisins (4), ladite chemise étant à jeu réduit par rapport audits élément voisins. 9. Dobby according to one of the preceding claims, characterized in that at least one of said levers (11) is surrounded by a jacket (114) of synthetic material compatible with the sliding of said lever relative to the neighboring elements (4) said jacket being reduced clearance relative to neighboring elements. 10. Métier à tisser équipé d'une ratière (1-20) selon l'une des revendications précédentes. 10. Loom equipped with a dobby (1-20) according to one of the preceding claims.
EP03356112A 2002-07-16 2003-07-15 Rotary dobby for weaving looms and loom with such a dobby Expired - Lifetime EP1382725B1 (en)

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FR0208972A FR2842538B1 (en) 2002-07-16 2002-07-16 ROTARY RATIERE FOR WEAVING, AND WEAVING EQUIPMENT PROVIDED WITH SUCH A RAIL
FR0208972 2002-07-16

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JP (1) JP4405198B2 (en)
KR (1) KR101002686B1 (en)
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Cited By (7)

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Publication number Priority date Publication date Assignee Title
EP1936014A1 (en) 2006-12-21 2008-06-25 STAUBLI Faverges Electromagnetic block and device for electromagnetic selection of the movement of warp frames and other shed formation mechanisms
DE102007020907A1 (en) 2007-04-26 2008-11-06 Picanol N.V. Method and device for starting up a weaving device
DE102007020907B4 (en) 2007-04-26 2020-04-23 Picanol Method and device for starting a weaving device
EP2365116A1 (en) 2010-03-12 2011-09-14 Stäubli Faverges Rotary dobby and loom provided with such a dobby
EP2460918A1 (en) 2010-12-06 2012-06-06 Staubli Faverges Selection device for controlling a dobby, selection unit and dobby controlled by such a selection device
FR2968317A1 (en) * 2010-12-06 2012-06-08 Staubli Sa Ets SELECTION DEVICE FOR CONTROLLING A RATIERE, SELECTION ASSEMBLY AND RATIERE CONTROLLED BY SUCH A SELECTION DEVICE
KR20190120721A (en) * 2018-04-16 2019-10-24 스또블리 파베르쥬 Rotary Dobby And Loom

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DE60309388T2 (en) 2007-09-20
JP4405198B2 (en) 2010-01-27
US6938647B2 (en) 2005-09-06
KR101002686B1 (en) 2010-12-21
FR2842538A1 (en) 2004-01-23
ATE344341T1 (en) 2006-11-15
US20040011417A1 (en) 2004-01-22
JP2004036074A (en) 2004-02-05
DE60309388D1 (en) 2006-12-14
FR2842538B1 (en) 2004-10-29
EP1382725B1 (en) 2006-11-02
TWI299066B (en) 2008-07-21
KR20040007283A (en) 2004-01-24
CN1320185C (en) 2007-06-06
TW200404110A (en) 2004-03-16
CN1477250A (en) 2004-02-25

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