EP0418177A1 - Double lift dobby machine with pulled balance levers for looms - Google Patents

Double lift dobby machine with pulled balance levers for looms Download PDF

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Publication number
EP0418177A1
EP0418177A1 EP90420403A EP90420403A EP0418177A1 EP 0418177 A1 EP0418177 A1 EP 0418177A1 EP 90420403 A EP90420403 A EP 90420403A EP 90420403 A EP90420403 A EP 90420403A EP 0418177 A1 EP0418177 A1 EP 0418177A1
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EP
European Patent Office
Prior art keywords
dobby
plates
oscillating
balance
selection system
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Granted
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EP90420403A
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German (de)
French (fr)
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EP0418177B1 (en
Inventor
Joseph Palau
Jean-Paul Froment
Jean-Pierre Pages
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Staubli Faverges SCA
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Staubli Faverges SCA
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    • 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
    • D03C1/06—Double-lift dobbies, i.e. dobbies in which separate draw-knives or equivalent operate on alternate picks

Definitions

  • the present invention relates to the dobbies for weaving machines and it relates more particularly to the dobbies of the pulled balance type.
  • each of the heald frames of the loom is connected to an oscillating lever which carries a balance, each of the ends of which is provided with a coupling member produced in the form of an articulated draw hook.
  • Each pulling hook is selectively actuated by a traction member formed by a rigid knife with reciprocating movement, suitable for moving the balance and the corresponding heald frame as a function of the command received from the weaving program incorporated in the selection system, which comprises an actuation mechanism equipped with a program and associated with reading and transmission elements.
  • This system acts on the pulling hooks which are moved vertically so as either to come to cooperate with the traction knife, or on the contrary to escape the action of the latter.
  • the reference 1 designates one of the heald frames of the weaving machine, this frame being associated with springs 2 which tend to lower it; the frame 1 is connected by a cable 3 to an oscillating lever 4 which pivots at 5 on the fixed frame and which pivotally carries a balance 6.
  • the ends of the latter are equipped with coupling members 7 constituted by articulated arms 8 has at the end of which a profiled part 8 is provided to cooperate with a traction member 9.
  • the two traction members 9 associated with the scales 6 of the dobby are supported by two lateral plates 10 wedged on a central shaft shown diagrammatically at 11 and animated of an oscillating movement. It will be observed that the rear part of each part 8 is shaped to engage in a cavity formed in a corresponding fixed cross member 12 secured to the frame of the dobby, bearing on the flat surfaces of this cross member.
  • each traction member 9 comprises at each balance a slide 9 a movable axially in a bearing 9 b profiled to receive the part 8 of the coupling member 7 which corresponds to it ; when the slider 9 a is controlled by the program selection system, the coupling member 7 is made integral with the traction member 9.
  • Each slide 9 has associated therewith a transmission device which comprises a pusher 13 associated with an angle lever 14, the two levers 14 being controlled by 15 displaced rods vertically by reading needles 16 so as to cooperate with a knife 17 to reciprocating or escaping from it.
  • the base of the needles 16 is supported by a perforated paper 18 whose design or program corresponds to the desired weave.
  • the reading and transmission elements which, in combination with the program actuation mechanism provided for at a fixed station, control the coupling of the traction members with the coupling members of each balance, are carried by the swinging stages.
  • the program actuation mechanism of the selection system can be constituted either by a simple pedestrian wheel, or by a single set of electromagnets associated with pushers with alternating axial displacement.
  • each lever 4 carries an oscillating balance 6 at the ends of which are mounted two coupling members 7 formed by pivoting pull hooks which cooperate with the traction members 9 ensuring the control of the balance 6 considered.
  • these traction members consist of latches 20 mounted idly on pins 21 disposed between the beak of the hooks 7 and the pivot 22 of each of these on the end of the balance 6, in the manner described in the French patent N o 87 00297 filed January 9, 1987 in the name of the Applicant.
  • the axes 21 on which the set of locks 20 of the different balances 6 of the dobby revolve are supported by the oscillating plates 10, it being observed that in FIG. 2 the balance 6 considered is shown in the high position for which its pivot 23 on the oscillating lever 4 coincides with the shaft 11 which drives the plates 10 of the oscillating movement, which promotes operation.
  • pins 21 which form pivots for the two lock assemblies 20 of the dobby are advantageously carried by guide elements or combs made according to French patent No. 07354/2 86 599 056 of 20 May 1986 in the name of the Applicant.
  • the plates 10 also support guides 24 intended to maintain the trajectory of the pulling hooks 7 when the heel of the latter is no longer bearing against the fixed crosspieces 12, constituted by simple elements with square section or rectangular.
  • each lock 20 is coupled a transmission or pulling element 25 capable of acting against a spring 26 which tends to keep said lock engaged against the beak of the corresponding hook 7.
  • the two opposite tie rods 25 intersect at the inside of a central guide 27 to come to be articulated on reading elements formed by fingers 28, with an elbow profile in the example considered, mounted idly on two shafts 29 which are common to all the scales of the dobby and whose ends are laid in the manner described in French patent No. 86 07354/2 599 056 cited above, by the two oscillating plates 10, in the same way that the central guide 27 mentioned above.
  • the dobby's selection system also includes an ac mechanism program operation, constituted by a pedestrian wheel 30 suitably driven in rotation and whose arrangement corresponds to the weave of the fabric to be obtained.
  • one of the two bent fingers 28 of each balance 6 comes to place its actuating tail at the level of the pedestrian wheel 30. If at this moment it does not have any courtdonne 30a, the finger 28 is not actuated, so that the corresponding latch 20 remains engaged against the draw hook 7 conjugate which continues its oscillating movement. If instead the wheel 30 has a courtdonne 30 has at the tail of the finger 28, the latter pivots about the axis 29 by exerting axial traction on the tie rod 25 (in the case of the upper finger 28 in fig. 2); the latch 20 is eclipsed by tilting against its return spring 26, thereby releasing the hook 7 which will then no longer be driven with the plates 10.
  • the selection system comprises a single fixed housing 31 which contains a number of electromagnets 32 equal to that of the scales 6 of the dobby.
  • Each electromagnet 32 controls an articulated pallet 33 which is coupled to a pusher 34 with axial displacement, the free end of which is advantageously capped with a nozzle 35.
  • electro- magnets 32 are selectively controlled according to the armor program.
  • the force which the electromagnets 32 must exert to ensure the control of the dobby is minimal and is in fact limited to the resistant force exerted by each return spring 36, because the attraction of the pallet 33 occurs while the pusher 34 is not subjected to any resistant force; this effort is exerted only when the pallet 33 is applied against the pole of the electromagnet 32, that is to say at the time of bonding which corresponds to the highest driving energy of the electromagnet .
  • such a selection system comprising a set of electromagnets which is mounted on a fixed station and which alone controls the traction members of the top and bottom of the dobby, is particularly suitable. well for the production of dobbies of the synchronized type, capable of operating in reverse for the unscrewing operations.
  • the traction members 9 are constituted by hooks 37 rigidly fixed on the tilting plates 10 and equipped with small actuating levers 38 which are articulated at 37 a on the hooks 37, being coupled to the tie rods 25 and receiving the action of return springs 39.
  • Each lever 38 is adapted to ensure the control of a coupling member 7 constituted by a pivotable latch 40 carried by the free end of an arm 40 articulated on one of the two pivots 22 of each balance 6.
  • a spring 40 b operates the elastic return of each latch 40 to the position of engagement with the spout of the traction hook 37 which corresponds to it.
  • the invention is capable of being implemented in the case where the mobile traction members 9 are formed, no longer by locks working under compression, but by slides of the type of those shown in FIG. 1, working in shear, or by tilting hooks, conventional working in bending.

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

Abstract

Double-lift dobby for looms, of the type in which the coupling members (7) articulated on the two ends of each balance lever (6) are intended, under the control of a selection system comprising a programmed actuating mechanism (30, 31) associated with reading and transmission elements (28-25), for interacting with movable pull members (9) carried by sinkers (10) driven in an oscillating movement, characterised in that the reading and transmission elements (28-25) are carried by the oscillating sinkers (10), so as to interact in turn with a retractable stop (30d, 34-35) of the actuating mechanism (30, 31) located at a fixed point. …<IMAGE>…

Description

La présente invention a trait aux ratières pour machines à tisser et elle concerne plus particulièrement les ratières du type à balances tirées.The present invention relates to the dobbies for weaving machines and it relates more particularly to the dobbies of the pulled balance type.

Les ratières suivant le système HATTERSLEY sont bien connues dans l'in­dustrie du matériel textile. On sait que dans ces ratières, chacun des cadres de lisses du métier est relié à un levier oscillant qui porte une balance dont chacune des extrémités est pourvue d'un organe d'attelage réalisé sous la forme d'un crochet articulé de tirage. Chaque crochet de tirage est sélectivement actionné par un organe de traction formé par un couteau rigide à mouvement alternatif, propre à déplacer la balance et le cadre de lisses correspondant en fonction de la commande reçue du programme de tissage incorporé au système de sélection, lequel comprend un mécanisme d'actionnement équipé d'un programme et associé à des élé­ments de lecture et de transmission. Ce système agit sur les crochets de tirage qui sont déplacés verticalement de manière soit à venir coopérer avec le couteau de traction, soit à échapper au contraire à l'action de celui-ci.The dobbies according to the HATTERSLEY system are well known in the textile material industry. It is known that in these dobbies, each of the heald frames of the loom is connected to an oscillating lever which carries a balance, each of the ends of which is provided with a coupling member produced in the form of an articulated draw hook. Each pulling hook is selectively actuated by a traction member formed by a rigid knife with reciprocating movement, suitable for moving the balance and the corresponding heald frame as a function of the command received from the weaving program incorporated in the selection system, which comprises an actuation mechanism equipped with a program and associated with reading and transmission elements. This system acts on the pulling hooks which are moved vertically so as either to come to cooperate with the traction knife, or on the contrary to escape the action of the latter.

On a proposé de réduire l'encombrement des ratières HATTERSLEY de type classique en faisant agir le système de sélection non plus sur les or­ganes d'attelage articulés aux extrémités de chaque balance, mais sur les organes de traction eux-mêmes. On se reportera sur ce point au bre­vet français No 1 567 237 déposé le 1er Mars 1968 au nom de GEBR. STAUBLI ET CO qui vise une ratière perfectionnée dont l'agencement géné­ral est schématiquement repris à la fig. 1 du dessin annexé aux présen­tes.It has been proposed to reduce the size of the HATTERSLEY dobbies of the conventional type by making the selection system act no longer on the coupling members articulated at the ends of each balance, but on the traction members themselves. Refer to this point in French Patent No. 1,567,237 filed on 1 March 1968 in the name of Gebr. STAUBLI ET CO which aims at an improved dobby whose general arrangement is shown schematically in fig. 1 of the drawing appended hereto.

Sur cette figure, la référence 1 désigne l'un des cadres de lisses de la machine à tisser, ce cadre étant associé à des ressorts 2 qui tendent à l'abaisser ; le cadre 1 est relié par un câble 3 à un levier oscillant 4 qui pivote en 5 sur le bâti fixe et qui porte à pivotement une balance 6. Les extrémités de cette dernière sont équipées d'organes d'attelage 7 constitués par des bras articulés 8a en bout desquels est prévue une pièce 8 profilée pour coopérer avec un organe de traction 9. Les deux organes de traction 9 associés aux balances 6 de la ratière sont suppor­tés par deux platines latérales 10 calées sur un arbre central schéma­tisé en 11 et animé d'un mouvement oscillant. On observera que la partie arrière de chaque pièce 8 est conformée pour s'engager dans une cavité ménagée dans une traverse fixe correspondante 12 solidaire du bâti de la ratière, en prenant appui sur des surfaces planes de cette traverse.In this figure, the reference 1 designates one of the heald frames of the weaving machine, this frame being associated with springs 2 which tend to lower it; the frame 1 is connected by a cable 3 to an oscillating lever 4 which pivots at 5 on the fixed frame and which pivotally carries a balance 6. The ends of the latter are equipped with coupling members 7 constituted by articulated arms 8 has at the end of which a profiled part 8 is provided to cooperate with a traction member 9. The two traction members 9 associated with the scales 6 of the dobby are supported by two lateral plates 10 wedged on a central shaft shown diagrammatically at 11 and animated of an oscillating movement. It will be observed that the rear part of each part 8 is shaped to engage in a cavity formed in a corresponding fixed cross member 12 secured to the frame of the dobby, bearing on the flat surfaces of this cross member.

Dans la forme de réalisation visée au brevet français précité, chaque organe de traction 9 comprend au niveau de chaque balance un coulisseau 9a mobile axialement dans une portée 9b profilée pour recevoir la pièce 8 de l'organe d'attelage 7 qui lui correspond ; lorsque le coulisseau 9a est commandé par le système de sélection à programme, l'organe d'attela­ge 7 est rendu solidaire de l'organe de traction 9.In the embodiment referred to in the aforementioned French patent, each traction member 9 comprises at each balance a slide 9 a movable axially in a bearing 9 b profiled to receive the part 8 of the coupling member 7 which corresponds to it ; when the slider 9 a is controlled by the program selection system, the coupling member 7 is made integral with the traction member 9.

On comprend que lorsque l'un des organes de traction 9 vient par pivote­ment coopérer avec l'organe d'attelage 7 correspondant alors que la pièce 8 opposée est en appui contre l'une des deux traverses fixes 12, l'oscillation des platines 10 assure bien la traction de la balance 6 qui bascule alors en élevant le cadre 1 à l'encontre des ressorts 2.It is understood that when one of the traction members 9 comes by pivoting to cooperate with the corresponding coupling member 7 while the opposite piece 8 is in abutment against one of the two fixed crosspieces 12, the oscillation of the plates 10 ensures the traction of the balance 6 which then tips by raising the frame 1 against the springs 2.

L'inconvénient principal de ce type particulier de ratière à balances tirées réside dans la complexité du système de sélection destiné à assu­rer la commande des organes de traction 9 en fonction de l'armure du tissu à réaliser. A chaque coulisseau 9a est associé un dispositif de transmission qui comprend un poussoir 13 associé à un levier coudé 14, les deux leviers 14 étant commandés par des tiges 15 déplacées vertica­lement par des aiguilles de lecture 16 de manière à coopérer avec un couteau 17 à mouvement alternatif ou à échapper à celui-ci. La base des aiguilles 16 est supportée par un papier perforé 18 dont le dessin ou programme correspond à l'armure désirée.The main drawback of this particular type of dobby with drawn scales lies in the complexity of the selection system intended to control the traction members 9 as a function of the weave of the fabric to be produced. Each slide 9 has associated therewith a transmission device which comprises a pusher 13 associated with an angle lever 14, the two levers 14 being controlled by 15 displaced rods vertically by reading needles 16 so as to cooperate with a knife 17 to reciprocating or escaping from it. The base of the needles 16 is supported by a perforated paper 18 whose design or program corresponds to the desired weave.

On conçoit qu'un tel système se prête mal à un fonctionnement à vitesse élevée et que les risques de défaut sont relativement importants. En outre, la complexité de la construction renchérit le coût de la ratière. On notera par ailleurs que les ressorts 19 associés aux leviers coudés 14 tendent à dégager les coulisseaux 9a hors des pièces 8 des organes d'attelage 7, si bien qu'il y a lieu, pour éviter toute désolidarisation intempestive, de prévoir des doigts élastiques de verrouillage 9c qui compliquent encore l'agencement. Enfin, tout défaut de synchronisation entre le mouvement oscillant des platines 10 (arbre 11) et celui des couteaux 17 est de nature à entraîner des défauts de tissage ou des avaries à la mécanique.It is understandable that such a system lends itself poorly to operation at high speed and that the risks of failure are relatively high. In addition, the complexity of the construction increases the cost of the dobby. It will be noted that the springs 19 associated with the crank levers 14 tend to disengage the slide 9 has off parts 8 for coupling organs 7, so it is necessary to prevent any untimely disconnection, to provide fingers 9 c locking elastics which further complicate the arrangement. Finally, any defect in synchronization between the oscillating movement of the plates 10 (shaft 11) and that of the knives 17 is likely to cause weaving defects or mechanical damage.

C'est à ces inconvénients qu'entend principalement remédier la présente invention, laquelle a pour objet la ratière définie à la revendication 1.It is these drawbacks that the present invention mainly intends to remedy, which relates to the dobby defined in claim 1.

Suivant l'invention, les éléments de lecture et de transmission qui, en combinaison avec le mécanisme d'actionnement à programme prévu à poste fixe, commandent l'accouplement des organes de traction avec les organes d'attelage de chaque balance, sont portés par les platines oscillantes.According to the invention, the reading and transmission elements which, in combination with the program actuation mechanism provided for at a fixed station, control the coupling of the traction members with the coupling members of each balance, are carried by the swinging stages.

On comprend qu'un tel agencement simplifie considérablement la construc­tion du système de sélection du fait que celui-ci n'a aucun effort à exercer pour assurer le contrôle de la balance considérée ; ce sont en effet les platines oscillantes formant supports pour l'ensemble des éléments de lecture et de transmission de la ratière qui fournissent cet effort en même temps que l'effort de traction.It will be understood that such an arrangement considerably simplifies the construction of the selection system because it has no effort to exert to ensure control of the balance considered; it is indeed the oscillating plates forming supports for all of the reading and transmission elements of the dobby which provide this effort at the same time as the traction effort.

Dans ces conditions, le mécanisme d'actionnement à programme du système de sélection peut être constitué soit par une simple roue à pédonnes, soit par un ensemble unique d'électro-aimants associés à des poussoirs à déplacement axial alternatif.Under these conditions, the program actuation mechanism of the selection system can be constituted either by a simple pedestrian wheel, or by a single set of electromagnets associated with pushers with alternating axial displacement.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention :

  • Comme indiqué ci-dessus, fig. 1 est une coupe tranversale illus­trant la structure d'une ratière à balances tirées de construction classique.
  • Fig. 2 est une coupe analogue illustrant l'agencement d'une ratière suivant l'invention.
  • Fig. 3 montre une variante de mise en oeuvre dans laquelle le sys­tème de sélection est constitué, non plus par une roue à pédonnes comme en fig. 2, mais par un ensemble d'électro-aimants.
  • Fig. 4 illustre un autre mode de mise en oeuvre de l'invention.
The appended drawing, given by way of example, will allow a better understanding of the invention:
  • As shown above, fig. 1 is a cross section illustrating the structure of a dobby with drawn scales of conventional construction.
  • Fig. 2 is a similar section illustrating the arrangement of a dobby according to the invention.
  • Fig. 3 shows an alternative embodiment in which the selection system is no longer constituted by a pedestrian wheel as in FIG. 2, but by a set of electromagnets.
  • Fig. 4 illustrates another embodiment of the invention.

En fig. 2, on retrouve la référence 4 désignant le levier oscillant qui est relié par le câble 3 à l'un des cadres de lisses de la machine à tisser et qui est articulé en 5 sur le bâti de la ratière. Comme en fig. 1, chaque levier 4 porte une balance oscillante 6 aux extrémités de laquelle sont montés deux organes d'attelage 7 formés par des crochets pivotants de tirage qui coopérent avec les organes de traction 9 assu­rant la commande de la balance 6 considérée.In fig. 2, we find the reference 4 designating the oscillating lever which is connected by the cable 3 to one of the heald frames of the weaving machine and which is articulated at 5 on the frame of the dobby. As in fig. 1, each lever 4 carries an oscillating balance 6 at the ends of which are mounted two coupling members 7 formed by pivoting pull hooks which cooperate with the traction members 9 ensuring the control of the balance 6 considered.

En fig. 2, ces organes de traction sont constitués par des verrous 20 montés fous sur des axes 21 disposés entre le bec des crochets 7 et le pivot 22 de chacun de ceux-ci sur l'extrémité de la balance 6, à la manière décrite dans le Brevet français No 87 00297 déposé le 9 Janvier 1987 au nom de la Demanderesse. Les axes 21 sur lesquels tourillonnent l'ensemble des verrous 20 des différentes balances 6 de la ratière sont supportés par les platines oscillantes 10, étant observé qu'en fig. 2 la balance 6 considérée est représentée en position haute pour laquelle son pivot 23 sur le levier oscillant 4 coïncide avec l'arbre 11 qui anime les platines 10 du mouvement oscillant, ce qui favorise le fonctionne­ment.In fig. 2, these traction members consist of latches 20 mounted idly on pins 21 disposed between the beak of the hooks 7 and the pivot 22 of each of these on the end of the balance 6, in the manner described in the French patent N o 87 00297 filed January 9, 1987 in the name of the Applicant. The axes 21 on which the set of locks 20 of the different balances 6 of the dobby revolve are supported by the oscillating plates 10, it being observed that in FIG. 2 the balance 6 considered is shown in the high position for which its pivot 23 on the oscillating lever 4 coincides with the shaft 11 which drives the plates 10 of the oscillating movement, which promotes operation.

Il convient ici d'observer que les axes 21 qui forment pivots pour les deux ensembles de verrous 20 de la ratière sont avantageusement portés par des éléments de guidage ou peignes réalisés conformément au brevet français No 86 07354/2 599 056 du 20 Mai 1986 au nom de la Demanderesse.It should here be noted that the pins 21 which form pivots for the two lock assemblies 20 of the dobby are advantageously carried by guide elements or combs made according to French patent No. 07354/2 86 599 056 of 20 May 1986 in the name of the Applicant.

On notera par ailleurs que les platines 10 supportent également des guides 24 destinés à maintenir la trajectoire des crochets de tirage 7 lorsque le talon de ceux-ci n'est plus en appui contre les traverses fixes 12, constituées par de simples éléments à section carrée ou rec­tangulaire.It will also be noted that the plates 10 also support guides 24 intended to maintain the trajectory of the pulling hooks 7 when the heel of the latter is no longer bearing against the fixed crosspieces 12, constituted by simple elements with square section or rectangular.

A chaque verrou 20 est attelé un élément de transmission ou tirant 25 propre à agir à l'encontre d'un ressort 26 qui tend à maintenir ledit verrou engagé contre le bec du crochet correspondant 7. Les deux tirants opposés 25 se croisent à l'intérieur d'un guide central 27 pour venir s'articuler sur des éléments de lecture formés par des doigts 28, à pro­fil coudé dans l'exemple considéré, montés fous sur deux arbres 29 qui sont communs à toutes les balances de la ratière et dont les extrémités sont portées, à la manière décrite au brevet français No 86 07354/­2 599 056 précité, par les deux platines oscillantes 10, de la même ma­nière que le guide central 27 sus-mentionné.
Le système de sélection de la ratière comprend encore un mécanisme d'ac­ tionnement à programme, constitué par une roue à pédonnes 30 convenable­ment entraînée en rotation et dont l'agencement correspond à l'armure du tissu à obtenir.To each lock 20 is coupled a transmission or pulling element 25 capable of acting against a spring 26 which tends to keep said lock engaged against the beak of the corresponding hook 7. The two opposite tie rods 25 intersect at the inside of a central guide 27 to come to be articulated on reading elements formed by fingers 28, with an elbow profile in the example considered, mounted idly on two shafts 29 which are common to all the scales of the dobby and whose ends are laid in the manner described in French patent No. 86 07354/2 599 056 cited above, by the two oscillating plates 10, in the same way that the central guide 27 mentioned above.
The dobby's selection system also includes an ac mechanism program operation, constituted by a pedestrian wheel 30 suitably driven in rotation and whose arrangement corresponds to the weave of the fabric to be obtained.

Le fonctionnement de la ratière décrite découle des explications qui précèdent et se comprend aisément.The operation of the dobby described follows from the foregoing explanations and is easily understood.

Au terme de chacune des courses oscillantes des platines 10, l'un des deux doigts coudés 28 de chaque balance 6 vient disposer sa queue d'act­ionnement au niveau de la roue à pédonnes 30. Si à ce moment celle-ci ne présente pas de pédonne 30a, le doigt 28 n'est pas actionné, si bien que le verrou correspondant 20 reste engagé contre le crochet de tirage 7 conjugué qui poursuit son déplacement oscillant. Si au contraire la roue 30 présente un pédonne 30a à la queue du doigt 28, celui-ci pivote sur l'axe 29 en exerçant une traction axiale sur le tirant 25 (cas du doigt supérieur 28 en fig. 2) ; le verrou 20 s'éclipse par basculement à l'en­contre de son ressort de rappel 26, en libérant de la sorte le crochet 7 qui ne sera alors plus entraîné avec les platines 10.At the end of each of the oscillating strokes of the plates 10, one of the two bent fingers 28 of each balance 6 comes to place its actuating tail at the level of the pedestrian wheel 30. If at this moment it does not have any pédonne 30a, the finger 28 is not actuated, so that the corresponding latch 20 remains engaged against the draw hook 7 conjugate which continues its oscillating movement. If instead the wheel 30 has a pédonne 30 has at the tail of the finger 28, the latter pivots about the axis 29 by exerting axial traction on the tie rod 25 (in the case of the upper finger 28 in fig. 2); the latch 20 is eclipsed by tilting against its return spring 26, thereby releasing the hook 7 which will then no longer be driven with the plates 10.

On peut constater que comme indiqué plus haut, l'effort de sélection est supporté de manière pratiquement intégrale par les platines motrices 10 puisque la rotation cyclique de la roue à pédonnes 30 n'intervient que lorsque les doigts 28 ne sont pas en appui sur sa périphérie. Les pédon­nes 30a se comportent en fait comme de simples butées.It can be seen that, as indicated above, the selection effort is supported almost entirely by the drive plates 10 since the cyclic rotation of the pedestrian wheel 30 only occurs when the fingers 28 are not resting on its periphery. The pedals 30 a actually behave like simple stops.

Bien entendu et en dépit de la fiabilité du système, il est avantageux de faire comporter à chaque tirant 25 un ressort de sécurité 25a apte à conférer audit tirant une certaine déformabilité élastique.Of course, despite the reliability of the system, it is advantageous to have each pulling 25 a safety spring 25 is able to give said pulling a certain elastic deformability.

Dans la variante de mise en oeuvre de l'invention illustrée en fig. 3, le système de sélection comprend un boîtier fixe unique 31 qui renferme un nombre d'électro-aimants 32 égal à celui des balances 6 de la ratiè­re. Chaque électro-aimant 32 commande une palette articulée 33 qui est attelée à un poussoir 34 à déplacement axial dont l'extrémité libre est avantageusement coiffée d'un embout 35. A la façon en soi connue dans la technique des ratières électroniques, les électro-aimants 32 sont com­mandés sélectivement en fonction du programme d'armure.In the variant embodiment of the invention illustrated in FIG. 3, the selection system comprises a single fixed housing 31 which contains a number of electromagnets 32 equal to that of the scales 6 of the dobby. Each electromagnet 32 controls an articulated pallet 33 which is coupled to a pusher 34 with axial displacement, the free end of which is advantageously capped with a nozzle 35. In the manner known per se in the technique of electronic dobbies, electro- magnets 32 are selectively controlled according to the armor program.

On conçoit dans ces conditions que lorsqu'un électro-aimant 32 est ali­ menté, l'attraction de sa palette 33 à l'encontre d'un ressort de rappel tel que 36 provoque le déplacement axial du poussoir 34 dont l'embout 35 vient se positionner sur la trajectoire de fin de course de l'un ou l'autre des deux doigts basculants 28 de la balance 6 correspondante, de sorte que ledit doigt et son verrou 20 sont commandés par l'intermé­diaire du tirant 25 envisagé. En revanche, lorsque l'électroaimant 32 n'est pas excité, la palette 33 et le poussoir 34 restent en retrait, si bien que l'embout 35 ne vient pas se placer sur la trajectoire des queues d'actionnement des doigts 28.It is conceivable under these conditions that when an electromagnet 32 is ali menté, the attraction of its pallet 33 against a return spring such as 36 causes the axial displacement of the plunger 34 whose end piece 35 comes to be positioned on the end of travel path of one or the other of the two tilting fingers 28 of the corresponding balance 6, so that said finger and its latch 20 are controlled by means of the envisaged tie rod 25. On the other hand, when the electromagnet 32 is not energized, the pallet 33 and the pusher 34 remain in withdrawal, so that the end piece 35 does not come to be placed on the path of the actuating tails of the fingers 28.

Il convient d'observer que l'effort que doivent exercer les électro­aimants 32 pour assurer la commande de la ratière est minime et se limi­te en réalité à l'effort résistant exercé par chaque ressort de rappel 36, du fait que l'attraction de la palette 33 intervient alors que le poussoir 34 n'est soumis à aucun effort résistant ; cet effort s'exerce uniquement lorsque la palette 33 est appliquée contre le pôle de l'élec­tro-aimant 32, c'est-à-dire au moment du collage qui correspond à l'énergie motrice la plus élevée de l'électro-aimant.It should be observed that the force which the electromagnets 32 must exert to ensure the control of the dobby is minimal and is in fact limited to the resistant force exerted by each return spring 36, because the attraction of the pallet 33 occurs while the pusher 34 is not subjected to any resistant force; this effort is exerted only when the pallet 33 is applied against the pole of the electromagnet 32, that is to say at the time of bonding which corresponds to the highest driving energy of the electromagnet .

On remarquera en outre qu'un tel système de sélection, comprenant un ensemble d'électro-aimants qui est monté à poste fixe et qui assure à lui seul la commande des organes de traction du haut et du bas de la ratière, se prête particulièrement bien à la réalisation de ratières du type synchronisé, susceptibles de fonctionner en marche arrière pour les opérations de détissage.It will further be noted that such a selection system, comprising a set of electromagnets which is mounted on a fixed station and which alone controls the traction members of the top and bottom of the dobby, is particularly suitable. well for the production of dobbies of the synchronized type, capable of operating in reverse for the unscrewing operations.

Dans la forme de mise en oeuvre illustrée en fig. 4, les organes de traction 9 sont constitués par des crochets 37 rigidement fixés sur les platines basculantes 10 et équipés de petits leviers d'actionnement 38 qui sont articulés en 37a sur les crochets 37, en étant attelés aux ti­rants 25 et en recevant l'action de ressorts de rappel 39. Chaque levier 38 est propre à assurer la commande d'un organe d'attelage 7 constitué par un verrou basculant 40 porté par l'extrémité libre d'un bras 40a articulé sur l'un des deux pivots 22 de chaque balance 6. Un ressort 40b opère le rappel élastique de chaque verrou 40 à la position d'engagement avec le bec du crochet de traction 37 qui lui correspond.In the embodiment illustrated in FIG. 4, the traction members 9 are constituted by hooks 37 rigidly fixed on the tilting plates 10 and equipped with small actuating levers 38 which are articulated at 37 a on the hooks 37, being coupled to the tie rods 25 and receiving the action of return springs 39. Each lever 38 is adapted to ensure the control of a coupling member 7 constituted by a pivotable latch 40 carried by the free end of an arm 40 articulated on one of the two pivots 22 of each balance 6. A spring 40 b operates the elastic return of each latch 40 to the position of engagement with the spout of the traction hook 37 which corresponds to it.

Le fonctionnement est autrement identique à celui décrit en référence à fig. 3.Operation is otherwise identical to that described with reference to fig. 3.

On conçoit que l'invention est susceptible d'être mise en oeuvre dans le cas où les organes mobiles de traction 9 sont constitués, non plus par des verrous travaillant à la compression, mais par des coulisseaux du type de ceux représentés en fig. 1, travaillant au cisaillement, ou par des crochets basculants, classiques travaillant à la flexion.It is understood that the invention is capable of being implemented in the case where the mobile traction members 9 are formed, no longer by locks working under compression, but by slides of the type of those shown in FIG. 1, working in shear, or by tilting hooks, conventional working in bending.

Claims (5)

1. Ratière à double lève pour machines à tisser, du genre dans lequel les organes d'attelage (7) articulés aux deux extrémités de chaque ba­lance (6) sont destinés à coopérer, sous le contrôle d'un système de sélection comprenant un mécanisme d'actionnement à programme (30, 31) associé à des éléments de lecture et de transmission (28-25), avec des organes mobiles de traction (9) portés par des platines (10) animées d'un mouvement oscillant, caractérisée en ce que les éléments de lecture et de transmission (28-25) sont portés par les platines oscillantes (10) de façon à venir à tour de rôle coopérer avec une butée éclipsable (30d, 34-35) du mécanisme d'actionnement (30, 31) prévu à poste fixe.1. Double dobby dobby for weaving machines, of the kind in which the coupling members (7) articulated at the two ends of each balance (6) are intended to cooperate, under the control of a selection system comprising a mechanism program actuation (30, 31) associated with reading and transmission elements (28-25), with mobile traction members (9) carried by plates (10) driven by an oscillating movement, characterized in that the reading and transmission elements (28-25) are carried by the oscillating plates (10) so as to take turns cooperating with an eclipsable stop (30 d , 34-35) of the actuation mechanism ( 30, 31) provided for a fixed post. 2. Ratière suivant la revendication 1, caractérisée en ce que les élé­ments de transmission sont constitués par des tirants opposés et croisés (25) qui relient les organes de traction (9) à deux doigts mobiles (28) portés par les platines oscillantes (10) de part et d'autre du plan de symétrie des organes précités passant par l'axe d'oscillation (11) des­dites platines.2. Dobby according to claim 1, characterized in that the transmission elements consist of opposite and crossed tie rods (25) which connect the traction members (9) to two movable fingers (28) carried by the oscillating plates (10 ) on either side of the plane of symmetry of the aforementioned members passing through the axis of oscillation (11) of said plates. 3. Ratière suivant l'une quelconque des revendications 1 et 2, caracté­risée en ce que la butée éclipsable du système de sélection est consti­tuée par l'un des pédonnes (30a) d'une roue tournante (30).3. Dobby according to any one of claims 1 and 2, characterized in that the eclipsable stop of the selection system is constituted by one of the pedals (30 a ) of a rotating wheel (30). 4. Ratière suivant l'une quelconque des revendications 1 et 2, caracté­risée en ce que la butée mobile du système de sélection est constituée par l'extrémité (35) d'un poussoir (34) à déplacement alternatif, attelé à la palette mobile (33) d'un électro-aimant (32).4. Dobby according to any one of claims 1 and 2, characterized in that the movable stop of the selection system consists of the end (35) of a pusher (34) reciprocating, coupled to the movable pallet (33) of an electromagnet (32). 5. Ratière suivant l'une quelconque des revendications qui précèdent, caractérissée en ce qu'en position haute, le pivot (23) qui assure l'at­telage de chaque balance (6) avec le levier oscillant (4) correspondant coïncide avec l'axe de l'arbre (11) qui confère aux platines (10) le mouvement oscillant.5. Dobby according to any one of the preceding claims, characterized in that in the high position, the pivot (23) which ensures the coupling of each balance (6) with the corresponding oscillating lever (4) coincides with the axis of the shaft (11) which gives the plates (10) the oscillating movement.
EP90420403A 1989-09-14 1990-09-13 Double lift dobby machine with pulled balance levers for looms Expired - Lifetime EP0418177B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912303A FR2651803B1 (en) 1989-09-14 1989-09-14 DOUBLE RAISED DRAWER OF THE DRAWN BALANCE TYPE FOR WEAVING MACHINES.
FR8912303 1989-09-14

Publications (2)

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EP0418177A1 true EP0418177A1 (en) 1991-03-20
EP0418177B1 EP0418177B1 (en) 1993-12-22

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EP90420403A Expired - Lifetime EP0418177B1 (en) 1989-09-14 1990-09-13 Double lift dobby machine with pulled balance levers for looms

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US (1) US5070911A (en)
EP (1) EP0418177B1 (en)
JP (1) JP2935438B2 (en)
KR (1) KR0139102B1 (en)
DE (1) DE69005401T2 (en)
ES (1) ES2047891T3 (en)
FR (1) FR2651803B1 (en)
RU (1) RU1813130C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0606517A1 (en) * 1992-12-25 1994-07-20 Kabushiki Kaisha Yamada Dobby Dobby
EP0745712A1 (en) * 1995-05-29 1996-12-04 Stoffel &amp; Sohn AG Cam control device for high performance negative dobby
FR2849451A1 (en) * 2002-12-26 2004-07-02 Staubli Sa Ets Loom dobby has rockers pivoted by arms connected to crank on one end of shaft rotating about fixed point relative to heddle frame

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2679263B1 (en) * 1991-07-15 1994-01-14 Staubli Ets IMPROVEMENTS ON HATTERSLEY DOUBLE RAISED RAILWAYS FOR WEAVING MACHINES.
DE19651190C1 (en) * 1996-12-10 1998-06-10 Mayer Textilmaschf Electromagnetic jacquard control device
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034045A1 (en) * 1980-02-07 1981-08-19 Yamada Dobby Co., Ltd. Double lift negative dobby machine
US4474221A (en) * 1982-09-16 1984-10-02 Yamada Dobby Co., Ltd. Positive dobby machine
EP0274455A1 (en) * 1987-01-09 1988-07-13 S.A. DES ETABLISSEMENTS STAUBLI (France) Negative dobby machines wth oscillating swing levers

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Publication number Priority date Publication date Assignee Title
CH470507A (en) * 1967-03-03 1969-03-31 Staeubli Geb & Co Shedding device for looms
FR2543172B1 (en) * 1983-03-22 1985-10-25 Staubli Sa Ets IMPROVEMENTS ON BALANCE RATIERS FOR WEAVING
FR2599056B1 (en) * 1986-05-20 1988-08-19 Staubli Sa Ets IMPROVEMENTS IN WEAVING MECHANICS FOR CROWD FORMATION ON WEAVING MACHINES
JPS6414338A (en) * 1987-06-30 1989-01-18 Yamada Dobby Co Ltd Control apparatus of dobby machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034045A1 (en) * 1980-02-07 1981-08-19 Yamada Dobby Co., Ltd. Double lift negative dobby machine
US4474221A (en) * 1982-09-16 1984-10-02 Yamada Dobby Co., Ltd. Positive dobby machine
EP0274455A1 (en) * 1987-01-09 1988-07-13 S.A. DES ETABLISSEMENTS STAUBLI (France) Negative dobby machines wth oscillating swing levers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0606517A1 (en) * 1992-12-25 1994-07-20 Kabushiki Kaisha Yamada Dobby Dobby
US5365979A (en) * 1992-12-25 1994-11-22 Kabushiki Kaisha Yamada Dobby Dobby for electromagnetically controlling a heald frame
EP0745712A1 (en) * 1995-05-29 1996-12-04 Stoffel &amp; Sohn AG Cam control device for high performance negative dobby
FR2849451A1 (en) * 2002-12-26 2004-07-02 Staubli Sa Ets Loom dobby has rockers pivoted by arms connected to crank on one end of shaft rotating about fixed point relative to heddle frame

Also Published As

Publication number Publication date
DE69005401T2 (en) 1994-05-26
RU1813130C (en) 1993-04-30
KR910006532A (en) 1991-04-29
FR2651803B1 (en) 1991-11-08
KR0139102B1 (en) 1998-05-15
DE69005401D1 (en) 1994-02-03
FR2651803A1 (en) 1991-03-15
JP2935438B2 (en) 1999-08-16
US5070911A (en) 1991-12-10
EP0418177B1 (en) 1993-12-22
ES2047891T3 (en) 1994-03-01
JPH03227425A (en) 1991-10-08

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