EP0274971A1 - Negative dobby machines with oscillating swing levers - Google Patents

Negative dobby machines with oscillating swing levers Download PDF

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Publication number
EP0274971A1
EP0274971A1 EP87420347A EP87420347A EP0274971A1 EP 0274971 A1 EP0274971 A1 EP 0274971A1 EP 87420347 A EP87420347 A EP 87420347A EP 87420347 A EP87420347 A EP 87420347A EP 0274971 A1 EP0274971 A1 EP 0274971A1
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EP
European Patent Office
Prior art keywords
oscillating
crosspieces
negative dobby
levers
hooks
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.)
Ceased
Application number
EP87420347A
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German (de)
French (fr)
Inventor
Joseph Palau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Staubli Faverges SCA
Original Assignee
Staubli Faverges SCA
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Filing date
Publication date
Application filed by Staubli Faverges SCA filed Critical Staubli Faverges SCA
Publication of EP0274971A1 publication Critical patent/EP0274971A1/en
Ceased legal-status Critical Current

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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
    • 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
    • D03C1/144—Features common to dobbies of different types linking to the heald frame

Definitions

  • each heald frame is operated against springs or other elastic means which tend to return the frame to a determined position.
  • each frame C is coupled by a cable and / or a pulling arm 1 to a suspension lever 2 articulated at 3 on the frame 4 of the dobby.
  • a connecting rod 5 connects each lever 2 to a balance-carrying lever 6, the set of levers 6 being pivotally supported on a common axis 7; this lever 6 is equipped at its free end with a balance 8 which is driven by a cyclic tilting movement around a pivot 9, so that the articulated spout 10 provided at each end of said balance 8 can come to cooperate with a tilting retaining hook 11.
  • the two hooks 11 are controlled by a common reading device 12 of the peg or perforated paper type, this device containing the weaving program for producing the envisaged tissue.
  • a common mechanism comprising two pushers or crosspieces 13 carried by two side plates 14 which pivot on a fixed axis of the frame 4. At least one these two plates 14 is driven by an oscillating movement, for example using an arm 15, the hub 15 a of which is wedged eccentrically on a drive shaft 16.
  • the crosspieces 13 consist of solid bars (see FIG. 2) with square or rectangular section, which come to bear against the face free plane of a heel provided on each spout 10, behind the axis 8 a which ensures the articulated fixing of each of these spouts 10 on its balance 8.
  • the invention essentially consists in giving that at least of the crosspieces 13 which is arranged at the level of the balance-carrying levers 6, an L-shaped cross section, in the manner illustrated in FIGS. 1 and 3.
  • the part or branch of the cross member 13 of FIG. 3 which comes to bear against the flat rear face of the heel of the spout 10 has a thickness and a bulk much smaller than that and that of the cross member 13 according to FIG. 2, while the resistance to bending is provided by the side part or branch which, because of its orientation, has a high moment of inertia to bending and therefore very high rigidity.
  • the invention is capable of being applied with interest to negative dobbies of the Hattersley type, of the kind of that illustrated in FIG. 4, which comprises two crosspieces 23 provided fixed so as to form supports for the rear part traction hooks 24 of the various scales 8 of the machine.
  • These traction hooks 24 are controlled vertically by rods 21 actuated by a reading device 22, so as to come, at the appropriate time depending on the weave of the fabric to be produced, to be placed on the path of oscillating traction members 25 driven by an alternative movement, the hook gripped then being driven to actuate the corresponding balance 8.
  • the operation is thus substantially similar to that described above with reference to FIG. 1, the difference residing in the fact that the movement input is effected at the level of the members 25 and no longer at that of the crosspieces.
  • the invention is also applicable to the Hattersley dobbies in which each balance is provided at its ends with spouts similar to those referenced 10 in FIG. 1, which cooperate with traction hooks carried by an oscillating plate similar to that which carries the members 25 of Figure 4.
  • the fixed lower support crosspiece will advantageously be formed by a piece with an L-shaped section so as to have a high resistance in a reduced size.

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

Abstract

Negative dobby of the type with rockers, of the kind in which each of the rockers (8) interacts with two common crossmembers (13, 23) capable of coming to bear against the heel of the pivoting beards or hooks (10, 24) as a function of the control provided by the reading-in device (12), characterised in that at least that crossmember (13) arranged in the region of the rocker carrier levers (6) having an indentation (6a) for receiving said crossmember possesses, in cross-section, an L-shaped profile suitable for reducing its overall size, whilst at the same time increasing its bending resistance. <IMAGE>

Description

On sait que dans les ratières de ce type, l'actionnement de chaque cadre de lisses est opéré à l'encontre de ressorts ou autres moyens élastiques qui tendent à rappeler le cadre à une position déterminée. Comme schématiquement illustré à la figure 1 du dessin annexé aux présentes, chaque cadre C est attelé par un câble et/ou un bras de tirage 1 à un levier de suspension 2 articulé en 3 sur le bâti 4 de la ratière. Une bielle 5 relie chaque levier 2 à un levier porte-balance 6, l'ensemble des leviers 6 étant supporté à pivotement sur un axe commun 7 ; ce levier 6 est équipè à son extrémité libre d'une balance 8 qui est animée d'un mouvement cyclique de basculement autour d'un pivot 9, de façon à ce que le bec articulé 10 prévu à chacune des extrémités de ladite balance 8 puisse venir coopérer avec un crochet basculant de retenue 11. Les deux crochets 11 sont commandés par un dispositif commun de lisage 12 du type à chevilles ou à papier perforé, ce dispositif renfermant le programme d'armure pour la réalisa­tion du tissue envisagé.We know that in the dobbies of this type, the actuation of each heald frame is operated against springs or other elastic means which tend to return the frame to a determined position. As schematically illustrated in Figure 1 of the drawing appended hereto, each frame C is coupled by a cable and / or a pulling arm 1 to a suspension lever 2 articulated at 3 on the frame 4 of the dobby. A connecting rod 5 connects each lever 2 to a balance-carrying lever 6, the set of levers 6 being pivotally supported on a common axis 7; this lever 6 is equipped at its free end with a balance 8 which is driven by a cyclic tilting movement around a pivot 9, so that the articulated spout 10 provided at each end of said balance 8 can come to cooperate with a tilting retaining hook 11. The two hooks 11 are controlled by a common reading device 12 of the peg or perforated paper type, this device containing the weaving program for producing the envisaged tissue.

Pour l'actionnement cyclique de l'ensemble des balances 8 de la ratière, il est prévu un mécanisme commun comprenant deux poussoirs ou traverses 13 portés par deux platines latérales 14 qui pivotent sur un axe fixe du bâti 4. L'une au moins de ces deux platines 14 est animée d'un mouvement oscillant, par exemple à l'aide d'un bras 15 dont le moyeu 15a est calé de manière excentrée sur un arbre d'entraînement 16.For the cyclic actuation of all the scales 8 of the dobby, there is provided a common mechanism comprising two pushers or crosspieces 13 carried by two side plates 14 which pivot on a fixed axis of the frame 4. At least one these two plates 14 is driven by an oscillating movement, for example using an arm 15, the hub 15 a of which is wedged eccentrically on a drive shaft 16.

Cette construction classique est bien connue en pratique et son agencement comme son fonctionnement ne nécessitent donc pas une description plus détaillée.This conventional construction is well known in practice and its arrangement and its operation therefore do not require a more detailed description.

Dans les ratières usuelles, les traverses 13 sont constituées par des barres massives (voir figure 2) à section carée ou rectangulaire, qui viennent prendre appui contre la face libre plane d'un talon prévu sur chaque bec 10, en arrière de l'axe 8a qui assure la fixation articulée de chacun de ces becs 10 sur sa balance 8.In the usual dobbies, the crosspieces 13 consist of solid bars (see FIG. 2) with square or rectangular section, which come to bear against the face free plane of a heel provided on each spout 10, behind the axis 8 a which ensures the articulated fixing of each of these spouts 10 on its balance 8.

Si pour la traverse supérieure 13 ce caractère massif ne présente guère d'inconvénient du fait qu'on dispose d'une place suffisante, il n'en va pas de même pour la traverse opposée dont la présence oblige à creuser chaque levier porte-balance 6 d'une large et profonde échancrure 6a. Cette dernière réduit évidemment la résistance du levier 6 dont le profil latéral en forme de C favorise déjà la déformation, alors que cette traverse se situe dans la zone où le levier concerné est soumis à des efforts très importants.If for the upper cross member 13 this massive character hardly presents any disadvantage of the fact that there is a sufficient space, it is not the same for the opposite cross member whose presence obliges to dig each balance-carrying lever 6 wide and deep indentation 6 a . The latter obviously reduces the resistance of the lever 6, the C-shaped lateral profile already promotes deformation, while this crosspiece is located in the area where the lever concerned is subjected to very large forces.

Le constructeur se trouve ainsi confronté à deux exigences contraires. Si pour réduire l'encombrement des traverses 13 on diminue quelque peu leur épaisseur, ces traverses deviennent le siège de fléchissements intempestifs qui donnent lieu à des vibrations néfastes et réduisent le jeu de fonctionnement prévu entre les extrémités des becs 10 et des crochets de retenue 11, en introduisant de ce fait des fautes de lisage. Si pour éviter cet inconvénient on augmente l'épaisseur des traverses 13, on doit accroître la profondeur de l'échancrure 6a des leviers 6 au détriment de la résistance de ceux-ci à la déformation.The manufacturer is thus faced with two opposite requirements. If in order to reduce the size of the crossbeams 13 their thickness is somewhat reduced, these crossbeams become the seat of untimely bending which gives rise to harmful vibrations and reduce the operating clearance provided between the ends of the spouts 10 and of the retaining hooks 11 , thereby introducing reading errors. If, to avoid this drawback, the thickness of the crosspieces 13 is increased, the depth of the cutout 6 has levers 6 must be increased to the detriment of their resistance to deformation.

On doit en conséquence s'arrêter à un compromis qui bien évidemment ne satisfait entièrement ni l'une ni l'autre des deux exigences.We must therefore stop at a compromise which obviously does not fully meet either of the two requirements.

C'est à cet inconvénient qu'entend remédier la présente invention, laquelle a pour objet la ratière qui est définie à la revendication.It is this drawback that the present invention intends to remedy, which relates to the dobby which is defined in the claim.

En fait l'invention consiste essentiellement à conférer à celle au moins des traverses 13 qui se trouve disposée au niveau des leviers porte-balance 6, une section transversale en forme de L, à la manière illustrée sur les figures 1 et 3.In fact, the invention essentially consists in giving that at least of the crosspieces 13 which is arranged at the level of the balance-carrying levers 6, an L-shaped cross section, in the manner illustrated in FIGS. 1 and 3.

Il suffit de comparer la solution visée en figure 3 à celle montrée en figure 2 pour vérifier les avantages présentés par la première vis-à-vis de la seconde.It suffices to compare the solution referred to in FIG. 3 to that shown in FIG. 2 to verify the advantages presented by the first with respect to the second.

Par suite de sa section en forme de L, la partie ou branche de la traverse 13 de figure 3 qui vient porter contre la face arrière plane du talon du bec 10 comporte une épaisseur et un encombrement bien inférieurs à celle et à celui de la traverse 13 suivant figure 2, alors que la résistance à la flexion est fournie par la partie ou branche latérale qui, en raison de son orientation, comporte un fort moment d'inertie à la flexion et de ce fait une très grande rigidité.As a result of its L-shaped section, the part or branch of the cross member 13 of FIG. 3 which comes to bear against the flat rear face of the heel of the spout 10 has a thickness and a bulk much smaller than that and that of the cross member 13 according to FIG. 2, while the resistance to bending is provided by the side part or branch which, because of its orientation, has a high moment of inertia to bending and therefore very high rigidity.

Dans ces conditions on peut, sans réduire la résistance de la traverse 13 suivant figure 3, diminuer la profondeur de l'échancrure 6a ménagée dans les leviers 6 pour l'oscillation de ladite traverse, et conférer ainsi auxdits leviers une largeur L bien supérieure à celle 1 suivant figure 2.Under these conditions, it is possible, without reducing the resistance of the cross-member 13 according to FIG. 3, to decrease the depth of the notch 6 a formed in the levers 6 for the oscillation of said cross-member, and thus give said levers a width L much greater. to that 1 according to figure 2.

Il convient d'observer que l'invention est susceptible d'être appliquée avec intérêt aux ratières négatives du type Hattersley, du genre de celle illustrée à la figure 4, qui comprend deux traverses 23 prévues fixes de manière à former appuis pour la partie arrière des crochets de traction 24 des différentes balances 8 de la machine. Ces crochets de traction 24 sont commandés verticalement par des tiges 21 actionnées par un dispositif de lisage 22, de façon à venir, au moment opportun en fonction de l'armure du tissu à réaliser, se disposer sur le trajet d'organes oscillants de traction 25 animés d'un déplacement alternatif, le crochet saisi étant alors entraîné pour actionner la balance 8 correspondante. Le fonctionnement est ainsi substantiellement analogue à celui décrit ci-dessus en référence à figure 1, la différence résidant dans le fait que l'entrée de mouvement est effectuée au niveau des organes 25 et non plus à celui des traverses.It should be noted that the invention is capable of being applied with interest to negative dobbies of the Hattersley type, of the kind of that illustrated in FIG. 4, which comprises two crosspieces 23 provided fixed so as to form supports for the rear part traction hooks 24 of the various scales 8 of the machine. These traction hooks 24 are controlled vertically by rods 21 actuated by a reading device 22, so as to come, at the appropriate time depending on the weave of the fabric to be produced, to be placed on the path of oscillating traction members 25 driven by an alternative movement, the hook gripped then being driven to actuate the corresponding balance 8. The operation is thus substantially similar to that described above with reference to FIG. 1, the difference residing in the fact that the movement input is effected at the level of the members 25 and no longer at that of the crosspieces.

On comprend qui l'adoption d'une section à profil en L pour la traverse inférieure 23 présente les même avantages qu'en figure 3 puisqu'elle évite d'avoir à creuser trop profondément l'échancrure 6a de chacun des leviers 6 de la ratière.We understand that the adoption of an L-shaped section for the bottom cross member 23 has the same advantages as in Figure 3 since it avoids having to dig too deeply the notch 6 a of each of the levers 6 of the dobby.

L'invention est encore applicable aux ratières Hattersley dans lesquelles chaque balance est pourvue à ses extrémités de becs analogues à ceux référencés 10 en figure 1, qui coopèrent avec des crochets de traction portés par une platine oscillante semblable à celle qui porte les organes 25 de figure 4. Dans ce cas également, la traverse inférieure fixe d'appui sera avantageusement formée par une pièce à section en L de façon à comporter une forte résistance sous un encombre­ment réduit.The invention is also applicable to the Hattersley dobbies in which each balance is provided at its ends with spouts similar to those referenced 10 in FIG. 1, which cooperate with traction hooks carried by an oscillating plate similar to that which carries the members 25 of Figure 4. In this case also, the fixed lower support crosspiece will advantageously be formed by a piece with an L-shaped section so as to have a high resistance in a reduced size.

Claims (1)

Ratière négative du type à balances oscillantes, du genre dans lequel chacune des balances oscillantes (8) coopère avec deux traverses communes (13, 23) aptes à venir porter contre le talon des becs ou crochets pivotants (10, 24) en fonction de la commande assurée par le dispositif de lisage (12), caractérisée en ce que celle au moins des traverses (13) qui est disposée au niveau des leviers porte-balances (6) creusés d'une échancrure (6a) pour le logement de ladite traverse, présente en section transversale un profil en forme de L propre à diminuer son encombrement tout en augmentant sa résistance à la flexion.Negative dobby of the type with oscillating scales, of the kind in which each of the oscillating scales (8) cooperates with two common crosspieces (13, 23) capable of coming to bear against the heel of the swiveling spouts or hooks (10, 24) depending on the control provided by the reading device (12), characterized in that that at least of the crosspieces (13) which is arranged at the level of the balance-carrying levers (6) hollowed out by a notch (6 a ) for the housing of said crosspiece, has in cross section an L-shaped profile suitable for reducing its size while increasing its resistance to bending.
EP87420347A 1986-12-19 1987-12-18 Negative dobby machines with oscillating swing levers Ceased EP0274971A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8618311 1986-12-19
FR8618311A FR2608644B1 (en) 1986-12-19 1986-12-19 IMPROVEMENTS ON NEGATIVE RATIERS OF THE OSCILLATING BALANCE TYPE

Publications (1)

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EP0274971A1 true EP0274971A1 (en) 1988-07-20

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EP87420347A Ceased EP0274971A1 (en) 1986-12-19 1987-12-18 Negative dobby machines with oscillating swing levers

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EP (1) EP0274971A1 (en)
JP (1) JPS63165553A (en)
BR (1) BR8705735A (en)
FR (1) FR2608644B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393750A2 (en) * 1989-04-18 1990-10-24 NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A. Main lever for a rotary dobby operating at high speed
US5143124A (en) * 1990-05-16 1992-09-01 S. A. Des Etablissements Staubli (France) Cable wear pad for dobby shedding lever

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392147A1 (en) * 1977-05-27 1978-12-22 Staubli Sa Ets IMPROVEMENTS TO DOUBLE LIFT RATIERS WITH BALANCES AND RETAINING HOOKS
US4527597A (en) * 1981-06-30 1985-07-09 Murata Kikai Kabushiki Kaisha Dobby

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392147A1 (en) * 1977-05-27 1978-12-22 Staubli Sa Ets IMPROVEMENTS TO DOUBLE LIFT RATIERS WITH BALANCES AND RETAINING HOOKS
US4527597A (en) * 1981-06-30 1985-07-09 Murata Kikai Kabushiki Kaisha Dobby

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393750A2 (en) * 1989-04-18 1990-10-24 NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A. Main lever for a rotary dobby operating at high speed
US5044407A (en) * 1989-04-18 1991-09-03 Nuovopignone Industrie Meccaniche E Fonderia S.P.A. Main lever for a rotary dobby operating at high speed
EP0393750B1 (en) * 1989-04-18 1993-09-01 NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A. Main lever for a rotary dobby operating at high speed
US5143124A (en) * 1990-05-16 1992-09-01 S. A. Des Etablissements Staubli (France) Cable wear pad for dobby shedding lever

Also Published As

Publication number Publication date
BR8705735A (en) 1988-07-19
JPS63165553A (en) 1988-07-08
FR2608644A1 (en) 1988-06-24
FR2608644B1 (en) 1989-03-31

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