EP0851046B1 - Rotary dobby and loom with such a dobby - Google Patents
Rotary dobby and loom with such a dobby Download PDFInfo
- Publication number
- EP0851046B1 EP0851046B1 EP97420241A EP97420241A EP0851046B1 EP 0851046 B1 EP0851046 B1 EP 0851046B1 EP 97420241 A EP97420241 A EP 97420241A EP 97420241 A EP97420241 A EP 97420241A EP 0851046 B1 EP0851046 B1 EP 0851046B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing surface
- plate
- dobby
- rotary dobby
- rotary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C1/00—Dobbies
- D03C1/14—Features common to dobbies of different types
- D03C1/16—Arrangements of dobby in relation to loom
-
- 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 present invention relates to a rotary dobby for ordering heald frames mounted on a loom and a loom equipped with such a dobby.
- the movement alternating vertical heald frames is provided by oscillating parts which can be formed, depending on the case, by rod-lever assemblies or by roller-bearing levers, these oscillating parts being controlled by elements actuation in the form of an eccentric in the first case or cam in the second.
- actuating elements are mounted on a main mechanical shaft which is animated by a intermittent rotation movement and, at each stop, makes all the U-turns, from the aforementioned shaft, the reading must, at each of the dobby blades, that is to say the actuation unit associated with each frame smooth, and depending on the design or weave to be obtained on the fabric being woven, securing the actuating element either with the shaft, to control the oscillating part, or with a fixed point in order to operate the angular immobilization of the latter.
- This selective joining is generally obtained at using a movable key-shaped coupling member or ratchet subjected to the action of two pivoting levers arranged on either side of the tree in order to activate this movable member at the two stop positions thereof, each pair of pivoting levers being placed under the dependence of the dobby reading device.
- the invention relates to a rotary dobby for a weaving loom comprising, at each of its blades, an oscillating part coupled to a heald frame and associated with an actuating element mounted idly on a shaft of said dobby, a mobile coupling member carried by a plate laterally secured to the actuating element, said movable member being subjected to elastic means for operate the angular connection of said plate with a disc integral with said shaft, and two pivoting levers subjected to the action, on the one hand of the reading device and, on the other hand to that of elastic means which tend to engage the spouts said levers with one of two wedging surfaces of said tray.
- This dobby is characterized in that the beak of each pivoting lever has an external bearing surface and an internal bearing surface, said bearing surfaces having angles at the top of different values.
- the internal and external scopes can respectively cooperate with each of the two surfaces trapping and their arrangement allows their heights do not add up, so the pivoting required for each lever only corresponds to the height of the highest range.
- the internal span is provided in the thickness of the span external. Thanks to this aspect of the invention, the height of the external scope alone defines the angular displacement maximum so that the spout of each lever escapes from surfaces jamming provided at the periphery of the plate.
- the angle at the top of the internal range has a value greater than the angle at the top of the outer staff.
- the angle at the top of the internal span has a value less than the angle at the top of the staff external.
- the two surfaces of jamming of the plate include a notch capable of receiving the beak of one of the pivoting levers and a pin capable of penetrating in the spout of the other pivoting lever. This provision of wedging surfaces is suitable for cooperation with the forms the spans of the swivel lever spouts.
- this notch and this tooth are diametrically opposed on the periphery of the plateau.
- the invention finally relates to a loom equipped with a dobby as previously described.
- the dobby represented in FIG. 1 comprises a main shaft 1 animated by an intermittent rotational movement with stopping every half-turn.
- This shaft 1 receives a series of bearings in number equal to that of the heald frames or looms of the loom.
- On each bearing is mounted an eccentric eccentric 2 laterally secured to a plate 3.
- On each eccentric 2 is mounted convinced the opening of a connecting rod 4 whose free end is harnessed to a pivoting arm 5 which ensures, thanks to a cable 6 a , the vertical displacement of the heald frame 6 of the envisaged blade, shown very schematically.
- the shaft 1 Between two contiguous eccentrics 2, the shaft 1, provided grooved, carries a drive disc 7 which is integral with it and the periphery of which is cut out by two radial notches 7 which are diametrically opposite one another. These notches 7 a are intended to selectively receive the terminal finger 8 a of a pawl 8 articulated on an axis 9 carried by the lateral plate 3 of the corresponding eccentric 2.
- a spring 10 tends to permanently return the finger 8 a from the pawl 8 in the direction of the shaft 1.
- each pawl 8 The control of each pawl 8 is ensured using two pivoting levers 11 carried at articulation by axes fixed 12 oriented parallel to the shaft 1.
- Each lever 11 has a generally angled profile and is stressed by a spring 13 in order to bear against a fixed stop corresponding 14.
- Each lever 11 comprises an actuating tail 15 likely to be selectively controlled by a pusher belonging to the dobby reading device and represented by arrows 16.
- each lever 11 has a spout 17 capable of cooperating with two wedging surfaces 18 and 19 formed on the periphery of the plate 3. Thanks to the spouts 17 and the wedging surfaces 18 and 19, the plate 3 can therefore be immobilized in two positions separated by a 180 ° rotation of the plate 3 depending on whether the spout 17 shown at left of Figure 1 cooperates with the surface 18 while the spout 17 shown on the right cooperates with the surface 19 or that the beak 17 shown on the left cooperates with surface 19 while the spout 17 shown on the right cooperates with the surface 18.
- the external bearing surface 20, represented active in FIG. 3, has a geometry adapted to press against the surfaces delimiting the notch 19.
- the angle at the top of this bearing surface 20 is noted ⁇ .
- An internal bearing surface 21 is defined in hollow in the spout 17 and we note ⁇ its angle at the top.
- the geometry of the bearing surface 21 is defined so that it is capable of pressing against the external surface of a tooth 18 a belonging to the wedging surface 18 as shown in FIG. 4.
- the angle at the apex ⁇ is greater than the angle at the apex ⁇ , so that it is easier to release the spout 17 when it cooperates with the surface 18 than when it cooperates with the surface 19, which is similar to the operating mode of the dobby of the invention in which the wedging obtained with the surface 18 is "passive" while the wedging obtained with the notch 19 is "active".
- the bearing surface 21 has a height H 2 which can be different from the height H 1 of the bearing surface 20. It is noted in particular that the internal bearing 21 is formed in the thickness of the external bearing 20, that is that is, the height H 2 is less than the height H 1 .
- the apex angle ⁇ 'of the internal bearing 21 has a value less than the apex angle ⁇ ' of the external bearing 20.
- This configuration can be used when effective or "active" jamming must be carried out on a tooth corresponding to tooth 18 of FIG. 4 while the escape from the bearing surface 20 must be facilitated.
- This configuration can be used when the wedging surface provided with a tooth is arranged near the end of the pawl 8.
- a loom equipped with a dobby as above described can operate faster, with less wear and making less noise than a loom equipped with a dobby of the prior art.
- the description which above was given only as an example and does not in no way limits the scope of the invention. It is understood, in particular, that the invention is likely to be applied to dobbies in which the actuating elements are not made up of eccentrics associated with connecting rods, but by cams profiles for controlling roller levers coupled to heald frames 6.
- the tilting pawls seem the most embodiment advantageous for movable coupling members, it is possible however have recourse to displacement key mechanism radial.
- the movable coupling member can be composed of several parts, for example two hooks, two latches or two keys.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Description
La présente 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 present invention relates to a rotary dobby for ordering heald frames mounted on a loom and a loom equipped with such a dobby.
On sait que dans les ratières rotatives, le mouvement vertical alternatif des cadres de lisses est assuré par des pièces oscillantes qui peuvent être constituées, suivant le cas, par des ensembles bielle-levier ou par des leviers porte-galet, ces pièces oscillantes étant commandées par des éléments d'actionnement en forme d'excentrique dans le premier cas ou de came dans le second. Ces éléments d'actionnement sont montés sur un arbre principal de la mécanique qui est animé d'un mouvement de rotation intermittent et, lors de chaque arrêt, en fait tous les demi-tours, de l'arbre précité, le dispositif de lisage doit, au niveau de chacune des lames de la ratière, c'est-à-dire de l'unité d'actionnement associée à chaque cadre de lisse, et en fonction du dessin ou armure à obtenir sur le tissu en cours de tissage, solidariser l'élément d'actionnement soit avec l'arbre, pour commander la pièce oscillante, soit avec un point fixe afin d'opérer l'immobilisation angulaire de cette dernière.We know that in rotary dobbies, the movement alternating vertical heald frames is provided by oscillating parts which can be formed, depending on the case, by rod-lever assemblies or by roller-bearing levers, these oscillating parts being controlled by elements actuation in the form of an eccentric in the first case or cam in the second. These actuating elements are mounted on a main mechanical shaft which is animated by a intermittent rotation movement and, at each stop, makes all the U-turns, from the aforementioned shaft, the reading must, at each of the dobby blades, that is to say the actuation unit associated with each frame smooth, and depending on the design or weave to be obtained on the fabric being woven, securing the actuating element either with the shaft, to control the oscillating part, or with a fixed point in order to operate the angular immobilization of the latter.
Cette solidarisation sélective est généralement obtenue à l'aide d'un organe mobile d'accouplement en forme de clavette ou de cliquet soumis à l'action de deux leviers pivotants disposés de part et d'autre de l'arbre afin d'actionner cet organe mobile aux deux positions d'arrêt de celui-ci, chaque paire de leviers pivotants étant placée sous la dépendance du dispositif de lisage de la ratière.This selective joining is generally obtained at using a movable key-shaped coupling member or ratchet subjected to the action of two pivoting levers arranged on either side of the tree in order to activate this movable member at the two stop positions thereof, each pair of pivoting levers being placed under the dependence of the dobby reading device.
Par la demande de brevet FR-A- 2 540 524, on connaít une ratière rotative pour métier à tisser dans laquelle un plateau, associé à chaque cadre de lisses, comprend deux entailles diamétralement opposées aptes à coopérer avec le bec de deux leviers pivotants commandés par un dispositif de lisage. Ces deux entailles ont des profils différents car l'une d'entre elles doit être relativement profonde pour conférer une position angulaire parfaitement précise au plateau et assurer ensuite une retenue efficace aussi longtemps que nécessaire. L'autre entaille est en revanche établie à une profondeur réduite et comporte des parois latérales très évasées orientées parallèlement aux chanfreins d'extrémités des flancs du bec de chaque levier pivotant afin que le bec du levier puisse être chassé automatiquement lors de la mise en rotation du plateau, sans action du dispositif de lisage sur le levier. Dans ce second cas, on parle d'engagement "passif" du bec dans l'entaille, car, même si l'engagement élastique a lieu de la même manière dans les deux entailles, le bec du second levier se laisse ici repousser passivement.By patent application FR-A- 2,540,524, we know a rotary dobby for loom in which a tray, associated with each heald frame, includes two notches diametrically opposed able to cooperate with the spout of two pivoting levers controlled by a reading device. These two notches have different profiles because one of them they must be relatively deep to give a perfectly precise angular position on the plate and ensure then effective restraint for as long as necessary. The other notch is however established at a depth reduced and has very flared oriented side walls parallel to the end chamfers of the sides of the spout each lever pivoted so that the lever spout can be driven out automatically when the plate is rotated, without action of the reading device on the lever. In this second case, we speak of "passive" engagement of the beak in the notch, because even if the elastic engagement takes place the same way in the two notches, the beak of the second lever is let passively grow here.
Les essais ont démontré qu'un tel agencement fonctionne de manière satisfaisante, mais le bec de chaque levier doit présenter une hauteur relativement importante car les portées respectivement utilisées avec la première et la seconde entailles du plateau ont des hauteurs qui s'additionnent dans le sens du dégagement du bec par rapport à ces entailles. Ceci induit que le mouvement angulaire de chacun des leviers pivotants doit avoir une amplitude relativement grande de façon à permettre le dégagement des deux portées prévues sur le bec de chacun de ces leviers. La puissance nécessaire pour un tel mouvement angulaire est importante, d'où une consommation énergétique relativement élevée de la ratière en question.Tests have shown that such an arrangement works satisfactorily, but the spout of each lever must present a relatively large height because the spans respectively used with the first and second notches of the plate have heights which add up in the direction of release of the beak in relation to these notches. This induced that the angular movement of each of the levers swivels must have a relatively large amplitude so to allow the clearance of the two spans provided on the spout of each of these levers. The power necessary for such a angular movement is important, hence consumption relatively high energy of the dobby in question.
En outre, ces mouvements angulaires de grande amplitude sont réalisés au moyen de chocs violents sur les leviers pivotants, ce qui induit une usure prématurée des éléments constitutifs de la ratière de l'art antérieur à moins que ceux-ci ne soient prévus particulièrement robustes. De plus, ces chocs sont générateurs de bruit, ce qui est fatiguant pour les opérateurs dont les postes de travail sont situés à proximité des métiers à tisser équipés des ratières connues.In addition, these large amplitude angular movements are made by means of violent shocks on the levers pivoting, which leads to premature wear of the elements constitutive of the dobby of the prior art unless these are not particularly robust. In addition, these shocks generate noise, which is tiring for operators whose workstations are located nearby weaving looms fitted with known dobbies.
Enfin, le pivotement des leviers n'est pas instantané et plus son amplitude est importante, plus il prend du temps. C'est pourquoi un pivotement d'amplitude importante des leviers est de nature à limiter la vitesse d'utilisation des ratières connues.Finally, the pivoting of the levers is not instantaneous and the greater its amplitude, the more time it takes. This is why a large amplitude pivoting of the levers is likely to limit the speed of use of the dobbies known.
C'est à ces inconvénients qu'entend plus particulièrement remédier la présente invention, en vue de permettre la réalisation d'une ratière rotative fonctionnant avec des leviers dont le pivotement est d'amplitude relativement faible.It is to these disadvantages that we hear more particularly remedy the present invention, in order to allow the realization a rotary dobby operating with levers including the pivoting is of relatively small amplitude.
Dans cet esprit, l'invention concerne une ratière rotative pour métier à tisser comprenant, au niveau de chacune de ses lames, une pièce oscillante attelée à un cadre de lisses et associée à un élément d'actionnement monté fou sur un arbre de ladite ratière, un organe mobile d'accouplement porté par un plateau latéralement solidaire de l'élément d'actionnement, ledit organe mobile étant soumis à des moyens élastiques pour opérer la liaison angulaire dudit plateau avec un disque solidaire dudit arbre, et deux leviers pivotants soumis à l'action, d'une part du dispositif de lisage et, d'autre part à celle de moyens élastiques qui tendent à engager les becs desdits leviers avec l'une de deux surfaces de coincement dudit plateau. Cette ratière est caractérisée en ce que le bec de chaque levier pivotant présente une surface de portée externe et une surface de portée interne, lesdites surfaces de portée ayant des angles au sommet de valeurs différentes.In this spirit, the invention relates to a rotary dobby for a weaving loom comprising, at each of its blades, an oscillating part coupled to a heald frame and associated with an actuating element mounted idly on a shaft of said dobby, a mobile coupling member carried by a plate laterally secured to the actuating element, said movable member being subjected to elastic means for operate the angular connection of said plate with a disc integral with said shaft, and two pivoting levers subjected to the action, on the one hand of the reading device and, on the other hand to that of elastic means which tend to engage the spouts said levers with one of two wedging surfaces of said tray. This dobby is characterized in that the beak of each pivoting lever has an external bearing surface and an internal bearing surface, said bearing surfaces having angles at the top of different values.
Grâce à l'invention, les portées interne et externe peuvent respectivement coopérer avec chacune des deux surfaces de coincement du plateau et leur disposition permet que leurs hauteurs ne s'additionnent pas, de sorte que le pivotement nécessaire pour chaque levier ne correspond qu'à la hauteur de la portée la plus haute.Thanks to the invention, the internal and external scopes can respectively cooperate with each of the two surfaces trapping and their arrangement allows their heights do not add up, so the pivoting required for each lever only corresponds to the height of the highest range.
Selon un premier aspect avantageux de l'invention, la portée interne est ménagée dans l'épaisseur de la portée externe. Grâce à cet aspect de l'invention, la hauteur de la portée externe définit à elle seule le déplacement angulaire maximum pour que le bec de chaque levier échappe aux surfaces de coincement prévues à la périphérie du plateau.According to a first advantageous aspect of the invention, the internal span is provided in the thickness of the span external. Thanks to this aspect of the invention, the height of the external scope alone defines the angular displacement maximum so that the spout of each lever escapes from surfaces jamming provided at the periphery of the plate.
Selon une première forme de réalisation avantageuse de l'invention l'angle au sommet de la portée interne a une valeur supérieure à l'angle au sommet de la portée externe. Selon une variante de l'invention, l'angle au sommet de la portée interne a une valeur inférieure à l'angle au sommet de la portée externe. Dans tous les cas et selon un autre aspect avantageux de l'invention, on peut prévoir que les deux surfaces de coincement du plateau comprennent une entaille apte à recevoir le bec d'un des leviers pivotants et un ergot apte à pénétrer dans le bec de l'autre levier pivotant. Cette disposition des surfaces de coincement est adaptée à la coopération avec la forme des portées des becs des leviers pivotants.According to a first advantageous embodiment of the invention the angle at the top of the internal range has a value greater than the angle at the top of the outer staff. According to one variant of the invention, the angle at the top of the internal span has a value less than the angle at the top of the staff external. In any case and according to another advantageous aspect of the invention, it can be provided that the two surfaces of jamming of the plate include a notch capable of receiving the beak of one of the pivoting levers and a pin capable of penetrating in the spout of the other pivoting lever. This provision of wedging surfaces is suitable for cooperation with the forms the spans of the swivel lever spouts.
Selon un autre aspect avantageux de l'invention, cette entaille et cette dent sont diamétralement opposés sur la périphérie du plateau.According to another advantageous aspect of the invention, this notch and this tooth are diametrically opposed on the periphery of the plateau.
L'invention concerne enfin un métier à tisser équipé d'une ratière telle que précédemment décrite.The invention finally relates to a loom equipped with a dobby as previously described.
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 établie conformément à l'invention ;
- La figure 2 est une vue en perspective montrant à l'état démonté, les éléments constitutifs essentiels de l'une des lames de la ratière suivant la figure 1 ;
- La figure 3 représente à plus grande échelle le bec d'un levier pivotant et l'entaille du plateau associé à une lame dans une première position de coincement ;
- La figure 4 est une vue analogue à la figure 3 alors qu'un levier coopère avec une partie du plateau diamétralement opposée à celle représentée à la figure 3 et
- La figure 5 est une vue de l'extrémité d'un levier pivotant d'une ratière rotative conforme à un second mode de réalisation de l'invention.
- Figure 1 is a schematic cross section of a dobby established in accordance with the invention;
- Figure 2 is a perspective view showing in the disassembled state, the essential components of one of the blades of the dobby according to Figure 1;
- Figure 3 shows on a larger scale the spout of a pivoting lever and the notch of the plate associated with a blade in a first wedging position;
- FIG. 4 is a view similar to FIG. 3 while a lever cooperates with a part of the plate diametrically opposite to that shown in FIG. 3 and
- Figure 5 is a view of the end of a pivoting lever of a rotary dobby according to a second embodiment of the invention.
La ratière représentée à la figure 1 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 lisses ou lames
du métier. Sur chaque roulement est monté fou un excentrique 2
solidaire latéralement d'un plateau 3. Sur chaque excentrique
2 est montée folle l'ouverture d'une bielle 4 dont l'extrémité
libre s'attelle à un bras pivotant 5 qui assure, grâce à un
câble 6a, le déplacement vertical du cadre de lisses 6 de la
lame envisagée, représenté de façon très schématique. 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.The dobby represented in FIG. 1 comprises a
La commande de chaque cliquet 8 est assurée à l'aide de
deux leviers pivotants 11 portés à articulation par des axes
fixes 12 orientés parallèlement à l'arbre 1. Chaque levier 11
présente un profil globalement en équerre et est sollicité par
un ressort 13 afin de venir en appui contre une butée fixe
correspondante 14. Chaque levier 11 comprend une queue d'actionnement
15 susceptible d'être sélectivement commandée par un
poussoir appartenant au dispositif de lisage de la ratière et
représenté par des flèches 16.The control of each
A l'opposé de sa queue 15, chaque levier 11 présente un
bec 17 susceptible de coopérer avec deux surfaces de coincement
18 et 19 ménagées à la périphérie du plateau 3. Grâce aux becs
17 et aux surfaces de coincement 18 et 19, le plateau 3 peut
donc être immobilisé dans deux positions séparées par une
rotation de 180° du plateau 3 selon que le bec 17 représenté à
gauche de la figure 1 coopère avec la surface 18 alors que le
bec 17 représenté à droite coopère avec la surface 19 ou que le
bec 17 représenté à gauche coopère avec la surface 19 alors que
le bec 17 représenté à droite coopère avec la surface 18.Opposite its
En l'absence d'actionnement du poussoir du dispositif de
lisage, les ressorts 13 tendent, lors de chaque arrêt du
plateau 3 en vis-à-vis des becs 17, à engager ces becs en
coopération avec la surface de coincement 19 en forme d'entaille,
ce qui a pour effet simultané d'immobiliser angulairement
le plateau 3, et avec lui l'excentrique 2 et la bielle 4,
et de commander le cliquet 8 au désaccouplement par 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 actuation of the pushing device of the reading device, the
Le fonctionnement est analogue à celui décrit dans FR-A-2
540 524. Le positionnement et l'extraction du bec 17 situé à
proximité du cliquet 8 par rapport à la surface 19 doivent être
réalisés de façon précise sous la commande du dispositif de
lisage. Le positionnement par rapport à la surface 18 du bec
situé à l'opposé du cliquet 8 est transitoire. Il est effectué
avec une faible puissance afin de permettre une éjection
automatique sans interaction avec le dispositif de lisage.Operation is analogous to that described in FR-A-2
540 524. The positioning and extraction of the
Pour remplir les fonctions énumérées ci-dessus et comme il
apparaít plus clairement aux figures 3 et 4, la géométrie des
becs, qui sont identiques puisqu'ils peuvent sélectivement
coopérer avec chacune des surfaces de coincement 18 et 19, est
définie de façon qu'ils présentent chacun une surface de portée
externe 20 et une surface de portée interne 21 respectivement
aptes à coopérer avec les surfaces de coincement 19 et 18.To perform the functions listed above and as it
appears more clearly in Figures 3 and 4, the geometry of
beaks, which are identical since they can selectively
cooperate with each of the
La surface de portée externe 20, représentée active à la
figure 3, a une géométrie adaptée à plaquer contre les surfaces
délimitant l'entaille 19. On note α l'angle au sommet de cette
surface de portée 20. Une surface de portée interne 21 est
définie en creux dans le bec 17 et l'on note β son angle au
sommet. La géométrie de la surface de portée 21 est définie
pour qu'elle soit apte à plaquer contre la surface externe
d'une dent 18a appartenant à la surface de coincement 18 comme
cela est représenté à la figure 4.The
On note que l'angle au sommet β est supérieur à l'angle au
sommet α, de sorte qu'il est plus facile de dégager le bec 17
lorsqu'il coopère avec la surface 18 que lorsqu'il coopère avec
la surface 19, ce qui est à rapprocher du mode de fonctionnement
de la ratière de l'invention dans lequel le coincement
obtenu avec la surface 18 est "passif" alors que le coincement
obtenu avec l'entaille 19 est "actif".It is noted that the angle at the apex β is greater than the angle at the apex α, so that it is easier to release the
La surface de portée 21 a une hauteur H2 qui peut être
différente de la hauteur H1 de la surface de portée 20. On note
en particulier que la portée interne 21 est ménagée dans
l'épaisseur de la portée externe 20, c'est-à-dire que la
hauteur H2 est inférieure à la hauteur H1.The
Dans le second mode de réalisation représenté à la figure
5, l'angle au sommet β' de la portée interne 21 a une valeur
inférieure à l'angle au sommet α' de la portée externe 20.
Cette configuration peut être utilisée lorsqu'un coincement
efficace ou "actif" doit être réalisé sur une dent correspondant
à la dent 18 de la figure 4 alors que l'échappement de la
portée 20 doit être facilité. Cette configuration pourra être
utilisée lorsque la surface de coincement munie d'une dent est
disposée à proximité de l'extrémité du cliquet 8.In the second embodiment shown in FIG. 5, the apex angle β 'of the
Un métier à tisser équipé d'une ratière telle que précédemment décrite peut fonctionner plus rapidement, avec moins d'usure et en faisant moins de bruit qu'un métier à tisser équipé d'une ratière de l'art antérieur.A loom equipped with a dobby as above described can operate faster, with less wear and making less noise than a loom equipped with a dobby of the prior art.
Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domaine de l'invention. On conçoit, en particulier, que l'invention est susceptible d'être appliquée aux ratières dans lesquelles les éléments d'actionnement sont constitués non pas par des excentriques associés à des bielles, mais par des cames profilées pour la commande de leviers porte-galets attelés à des cadres de lisses 6. De la même manière et bien que les cliquets basculants semblent le mode de réalisation le plus avantageux pour les organes mobiles d'accouplement, on peut toutefois avoir recours à des mécanisme de clavette à déplacement radial. De même, l'organe mobile d'accouplement peut être composé de plusieurs parties, par exemple de deux crochets, de deux verrous ou de deux clavettes.It should also be understood that the description which above was given only as an example and does not in no way limits the scope of the invention. It is understood, in particular, that the invention is likely to be applied to dobbies in which the actuating elements are not made up of eccentrics associated with connecting rods, but by cams profiles for controlling roller levers coupled to heald frames 6. In the same way and although the tilting pawls seem the most embodiment advantageous for movable coupling members, it is possible however have recourse to displacement key mechanism radial. Similarly, the movable coupling member can be composed of several parts, for example two hooks, two latches or two keys.
Claims (7)
- A rotary dobby for a weaving loom, comprising, at the level of each of its heald shafts, an oscillating member (4) coupled to a heald frame (6) and associated with an actuating element (2) mounted loosely on a main shaft (1) of said dobby, a mobile coupling member (8) carried by a plate (3) laterally integral with the actuating element, said mobile member being subject to resilient means (10) for effecting angular connection of said plate with a disk (7) integral with said main shaft, and two pivoted levers (11) subject, on the one hand, to the action of a reading-in device (16) and, on the other hand, to that of resilient means (13) which tend to engage the tips (17) of said levers with one of two surfaces (18, 19) for wedging said plate, characterised in that said tip of each pivoted lever has an outer bearing surface (20) and an inner bearing surface (21), said bearing surfaces having apex angles (α, β, α', β') of different values.
- A rotary dobby according to claim 1, characterised in that said inner bearing surface (21) is recessed into the thickness of said outer bearing surface (20).
- A rotary dobby according to claim 1 or claim 2, characterised in that the apex angle (β) of said inner bearing surface (21) has a value greater than that of the apex angle (a) of said outer bearing surface (20).
- A rotary dobby according to claim 1 or claim 2, characterised in that the apex angle (β') of said inner bearing surface (21) is has a value lower than that of the apex angle (α') of said outer bearing surface (20).
- A rotary dobby according to claim 1, characterised in that said two wedging surfaces (18, 19) of said plate (3) comprise a notch (19) capable of accommodating the tip (17) of one of said pivoted levers (11) and a tooth (18a) capable of penetrating into the tip (17) of the other pivoted lever (11) .
- A rotary dobby according to claim 5, characterised in that said notch (19) and said tooth (18a) are diametrically opposed on the periphery of said plate (3).
- A weaving loom equipped with a rotary dobby according to any one of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9616392A FR2757883B1 (en) | 1996-12-31 | 1996-12-31 | ROTARY RATIERE AND WEAVING MACHINE EQUIPPED WITH SUCH A RATIERE |
FR9616392 | 1996-12-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0851046A1 EP0851046A1 (en) | 1998-07-01 |
EP0851046B1 true EP0851046B1 (en) | 2000-03-29 |
Family
ID=9499448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97420241A Expired - Lifetime EP0851046B1 (en) | 1996-12-31 | 1997-12-23 | Rotary dobby and loom with such a dobby |
Country Status (8)
Country | Link |
---|---|
US (1) | US5918645A (en) |
EP (1) | EP0851046B1 (en) |
JP (1) | JP3545187B2 (en) |
KR (1) | KR100418081B1 (en) |
CN (1) | CN1057353C (en) |
DE (1) | DE69701559T2 (en) |
ES (1) | ES2143838T3 (en) |
FR (1) | FR2757883B1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002069783A (en) * | 2000-09-05 | 2002-03-08 | Tsudakoma Corp | Apparatus for opening warp in weaving machine |
US6682250B2 (en) | 2001-11-07 | 2004-01-27 | Lockheed Martin Corporation | Position-adjustable fastening apparatus and method |
FR2842538B1 (en) * | 2002-07-16 | 2004-10-29 | Staubli Sa Ets | ROTARY RATIERE FOR WEAVING, AND WEAVING EQUIPMENT PROVIDED WITH SUCH A RAIL |
ITMI20022151A1 (en) * | 2002-10-10 | 2004-04-11 | Fimtextile Spa | DEVICE FOR IMPLEMENTING THE PROGRAMMING OF ROTARY DOBBIES FOR WEAVING MACHINES CONTAINING PERFECTED ELECTRIC ROTARY MOTOR CONTROL VEHICLES |
DE10343377B3 (en) * | 2003-09-17 | 2005-04-28 | Groz Beckert Kg | Shaft drive for weaving shafts |
DE102005010807B3 (en) * | 2005-03-07 | 2006-04-06 | Groz-Beckert Kg | Drive for loom shafts, including specific switching catch mechanism for connection of first or second drive disk to drive arrangement, allowing high speed operation |
US7475708B2 (en) * | 2004-11-17 | 2009-01-13 | Groz-Beckert Kg | Shaft drive for heald shafts of weaving machines |
FR2884527B1 (en) * | 2005-04-15 | 2007-07-13 | Staubli Faverges Sca | ARMOR CAM MECHANICS, METHOD OF ASSEMBLING SUCH A MECHANICAL AND WEAVING COMPRISING SUCH A MECHANICAL |
DE102005059911B3 (en) * | 2005-12-15 | 2007-02-08 | Groz-Beckert Kg | Heddle frame drive unit for loom, includes non circular-gearing of varying velocity ratio, with shaft compensating fluctuations in loading |
FR2899602B1 (en) * | 2006-04-11 | 2008-05-23 | Staubli Faverges Sca | ROTARY RATIERE, WEAVING COMPRISING SUCH A REAL ESTATE AND METHOD OF CONTROLLING SUCH REAL ESTATE |
FR2957366B1 (en) * | 2010-03-12 | 2012-04-13 | Staubli Sa Ets | ROTARY RATIERE AND WEAVING EQUIPPED WITH SUCH A RETIRE |
CN102400257B (en) * | 2011-11-07 | 2012-11-07 | 常熟纺织机械厂有限公司 | Rotary type multi-arm shedding mechanism |
CN102995212B (en) * | 2012-12-24 | 2013-12-11 | 常熟纺织机械厂有限公司 | Selecting and comprehensively actuating mechanism for rotary type dobby opening device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2515702A1 (en) * | 1981-10-29 | 1983-05-06 | Staubli Sa Ets | IMPROVEMENTS ON ROTARY TRACKS |
EP0109999B1 (en) * | 1982-12-03 | 1988-03-09 | GebràDer Sulzer Aktiengesellschaft | Loom dobby |
FR2540524B1 (en) * | 1983-02-07 | 1985-07-26 | Staubli Sa Ets | SYNCHRONIZED ROTARY RATIERE FOR WEAVING |
DE3414639A1 (en) * | 1984-04-18 | 1985-10-24 | W. Schlafhorst & Co, 4050 Mönchengladbach | ROTATIONAL SHAFT |
FR2563541B1 (en) * | 1984-04-27 | 1986-07-11 | Staubli Sa Ets | IMPROVEMENTS IN ROTARY-TYPE WEAVING MECHANICS FOR WEAVING MATERIALS |
DE3614203C2 (en) * | 1986-04-26 | 1994-06-30 | Kaiser Gmbh & Co Kg | Shaft control device of a weaving machine |
IT1254219B (en) * | 1992-02-25 | 1995-09-14 | ECCENTRIC PERFECTED FOR ROTARY DOBBY |
-
1996
- 1996-12-31 FR FR9616392A patent/FR2757883B1/en not_active Expired - Fee Related
-
1997
- 1997-12-15 US US08/990,792 patent/US5918645A/en not_active Expired - Fee Related
- 1997-12-23 ES ES97420241T patent/ES2143838T3/en not_active Expired - Lifetime
- 1997-12-23 EP EP97420241A patent/EP0851046B1/en not_active Expired - Lifetime
- 1997-12-23 DE DE69701559T patent/DE69701559T2/en not_active Expired - Lifetime
- 1997-12-24 JP JP35531997A patent/JP3545187B2/en not_active Expired - Fee Related
- 1997-12-30 CN CN97123476A patent/CN1057353C/en not_active Expired - Lifetime
- 1997-12-30 KR KR1019970078656A patent/KR100418081B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP3545187B2 (en) | 2004-07-21 |
FR2757883A1 (en) | 1998-07-03 |
CN1186880A (en) | 1998-07-08 |
KR100418081B1 (en) | 2004-05-07 |
KR19980064815A (en) | 1998-10-07 |
CN1057353C (en) | 2000-10-11 |
DE69701559D1 (en) | 2000-05-04 |
DE69701559T2 (en) | 2000-07-27 |
EP0851046A1 (en) | 1998-07-01 |
JPH10237736A (en) | 1998-09-08 |
US5918645A (en) | 1999-07-06 |
FR2757883B1 (en) | 1999-02-19 |
ES2143838T3 (en) | 2000-05-16 |
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