EP0568473A1 - Driving system for the reciprocating knife boxes of a loom dobby - Google Patents

Driving system for the reciprocating knife boxes of a loom dobby Download PDF

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Publication number
EP0568473A1
EP0568473A1 EP93420177A EP93420177A EP0568473A1 EP 0568473 A1 EP0568473 A1 EP 0568473A1 EP 93420177 A EP93420177 A EP 93420177A EP 93420177 A EP93420177 A EP 93420177A EP 0568473 A1 EP0568473 A1 EP 0568473A1
Authority
EP
European Patent Office
Prior art keywords
shaft
frames
levers
driving system
articulated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93420177A
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German (de)
French (fr)
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EP0568473B1 (en
Inventor
Dario Bassi
Damien Bouchet
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.)
Staeubli Lyon SA
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Staeubli Verdol SA
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Publication of EP0568473A1 publication Critical patent/EP0568473A1/en
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Publication of EP0568473B1 publication Critical patent/EP0568473B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D03C3/32—Jacquard driving mechanisms
    • D03C3/36—Griffe operating mechanisms

Definitions

  • the present invention relates to a mechanism for controlling the reciprocating movement of the claw frames of a device for forming the crowd of a loom.
  • the invention relates more particularly, although not exclusively, to a device of the type in question produced in the form of an armor mechanism having a great length in the direction of the chain.
  • Armor mechanics of this kind are generally actuated by means of a set of connecting rods and levers from a rotating shaft in synchronism with the loom.
  • This shaft which is arranged transversely, that is to say in the direction of the weft of the fabric, is located outside the chassis of the machine.
  • eccentrics or cams actuating levers intended to control rockers or similar devices from which the usual control levers for the two claw frames leave.
  • control shaft is located in the middle part of its chassis so that the rods controlled by this shaft are short and light, therefore economical, although very resistant to buckling.
  • the mechanism according to the invention comprises a shaft arranged in the middle part of the chassis of the device, while the V-shaped lever wedged on this shaft comprises two articulations for the ends of two short connecting rods whose opposite ends are respectively articulated in opposition to the two usual pendulums which control the actuation levers of the two claw frames.
  • the attached drawing given as an example, will allow a better understanding the invention, the characteristics which it presents and the advantages which it is capable of providing:
  • the single figure of the drawing is a schematic elevation view of the mechanism according to the invention.
  • the chassis 1 of an armor mechanism has been shown diagrammatically in broken lines, essentially comprising two claw frames 2, 3 which are moved vertically back and forth by means of a control mechanism according to the invention.
  • the frame 1 is placed on two beams 4, 5 located above a not shown weaving loom whose warp threads must be raised and / or lowered by means of the weaving mechanics illustrated.
  • the control shaft of the mechanism according to the invention is arranged in the middle part of the chassis 1 and it has been assigned the reference 6. This shaft is controlled in rotation by the loom and we will not return to this well known drive .
  • the lever 11 has an extension 11c in duquels angles are mounted two axes 13, 14 around which are articulated respectively at one end of a connecting rod 15, 16.
  • the frames 2 and 3 are driven in a vertical back and forth movement thanks to the presence of two long levers 17, 18 associated with the upper frame and by two short levers 19, 20 articulated to the lower frame 3.
  • the levers 17, 19 and 18, 20 are mounted oscillating in pairs on a balance 21, 22 which pivots around a shaft 23, 24. These two shafts are arranged symmetrically with respect to the transverse plane of the chassis 1 containing the geometric axis of the shaft 6.
  • each cheek 21 has , 22 a comprises a fixed axis 25, 26 around which the second end of the levers 15, 16 pivots.
  • the connecting rods 15 and 16 are relatively short, so that they do not interfere with rapid operation of the mechanics because they do not cause any difficulty in terms of of their inertia, even if the length of the chassis 1 in the direction of the chain is very large.
  • the ends of the levers 17, 18, 19, 20 which cooperate with the pendulums 21 and 22 can be placed in different positions in lights 21 b , 21 c of the pendulum 21 and 22 b , 22 c of that 22 in order to adjust the stroke of frames 2 and 3.

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

Abstract

Its control shaft (6) is arranged in the middle part of the frame (1) of the apparatus. The V-lever (11) which cooperates with the cams (7, 8) keyed on the shaft (6) comprises two joints (13, 14) for the ends of two short connecting rods (15, 16), the opposite ends of which are respectively articulated relative to axles (25, 26) placed in opposition on the rockers (21 and 22) which control the levers (17, 18, 19, 20) for actuating the two knife boxes (2, 3). <IMAGE>

Description

La présente invention est relative à un mécanisme de commande du mouvement de va-et-vient des cadres de griffes d'un dispositif de formation de la foule d'un métier à tisser. L'invention a trait plus particulièrement, bien que non exclusivement, à un dispositif du genre en question réalisé sous la forme d'une mécanique d'armure présentant une grande longueur dans le sens de la chaîne.The present invention relates to a mechanism for controlling the reciprocating movement of the claw frames of a device for forming the crowd of a loom. The invention relates more particularly, although not exclusively, to a device of the type in question produced in the form of an armor mechanism having a great length in the direction of the chain.

Les mécaniques d'armure de cette sorte sont généralement actionnées au moyen d'un ensemble de bielles et de leviers à partir d'un arbre tournant en synchronisme avec le métier à tisser. Cet arbre, qui est disposé transversalement, c'est-à-dire dans le sens de la trame du tissu, se trouve à l'extérieur du châssis de la mécanique. Sur l'arbre sont calés des excentriques ou cames actionnant des leviers destinés à commander des basculeurs ou dispositifs analogues à partir desquels partent les leviers usuels de commande des deux cadres de griffes. On comprend aisément que dans une telle structure, les leviers issus de l'arbre de commande de la mécanique sont de grande longueur, de telle sorte qu'ils sont de réalisation peu économique du fait de leur complexité. En outre, ces leviers doivent être conçus pour ne pas flamber lors de la transmission des efforts, ce qui nécessite de leur faire comporter une structure lourde qui nuit au fonctionnement rapide d'une telle mécanique du fait de leur inertie.Armor mechanics of this kind are generally actuated by means of a set of connecting rods and levers from a rotating shaft in synchronism with the loom. This shaft, which is arranged transversely, that is to say in the direction of the weft of the fabric, is located outside the chassis of the machine. On the shaft are fitted eccentrics or cams actuating levers intended to control rockers or similar devices from which the usual control levers for the two claw frames leave. It is easy to understand that in such a structure, the levers from the mechanical control shaft are very long, so that they are not very economical to produce due to their complexity. In addition, these levers must be designed so as not to buckle during the transmission of forces, which requires them to have a heavy structure which impairs the rapid operation of such a mechanism due to their inertia.

Les perfectionnements qui font l'objet de la présente invention visent à remédier à ces inconvénients et à permettre la réalisation d'un mécanisme de commande en va-et-vient des cadres de griffes d'un dispositif de formation de la foule dont l'arbre de commande se trouve dans la partie médiane de son châssis afin que des bielles commandées par cet arbre soient courtes et légères, donc de réalisation économique, bien que très résistantes au flambage.The improvements which are the subject of the present invention aim to remedy these drawbacks and to allow the realization of a back-and-forth control mechanism for the claw frames of a crowd-forming device, the control shaft is located in the middle part of its chassis so that the rods controlled by this shaft are short and light, therefore economical, although very resistant to buckling.

A cet effet, le mécanisme suivant l'invention comprend un arbre disposé dans la partie médiane du châssis du dispositif, tandis que le levier en V calé sur cet arbre comprend deux articulations pour les extrémités de deux bielles courtes dont les extrémités opposées sont respectivement articulées en opposition aux deux balanciers usuels qui commandent les leviers d'actionnement des deux cadres de griffes.To this end, the mechanism according to the invention comprises a shaft arranged in the middle part of the chassis of the device, while the V-shaped lever wedged on this shaft comprises two articulations for the ends of two short connecting rods whose opposite ends are respectively articulated in opposition to the two usual pendulums which control the actuation levers of the two claw frames.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :
   La figure unique du dessin est une vue schématique en élévation du mécanisme suivant l'invention.The attached drawing, given as an example, will allow a better understanding the invention, the characteristics which it presents and the advantages which it is capable of providing:
The single figure of the drawing is a schematic elevation view of the mechanism according to the invention.

On a schématisé en traits discontinus le châssis 1 d'une mécanique d'armure comprenant essentiellement deux cadres de griffes 2, 3 qui sont déplacés verticalement en va-et-vient grâce à un mécanisme de commande suivant l'invention.The chassis 1 of an armor mechanism has been shown diagrammatically in broken lines, essentially comprising two claw frames 2, 3 which are moved vertically back and forth by means of a control mechanism according to the invention.

Le châssis 1 est posé sur deux poutrelles 4, 5 situées au-dessus d'un métier à tisser non représenté dont les fils de chaîne doivent être élevés et/ou abaissés au moyen de la mécanique d'armure illustrée.The frame 1 is placed on two beams 4, 5 located above a not shown weaving loom whose warp threads must be raised and / or lowered by means of the weaving mechanics illustrated.

L'arbre de commande du mécanisme suivant l'invention est disposé dans la partie médiane du châssis 1 et on lui a affecté la référence 6. Cet arbre est commandé en rotation par le métier à tisser et on ne reviendra pas sur cet entrainement bien connu.The control shaft of the mechanism according to the invention is arranged in the middle part of the chassis 1 and it has been assigned the reference 6. This shaft is controlled in rotation by the loom and we will not return to this well known drive .

Sur l'arbre 6 sont calés deux cames 7, 8 coopérant respectivement avec un galet 9, 10 monté à rotation libre à l'extrémité des deux branches en V 11a, 11b d'un levier 11 claveté sur un arbre 12. On comprend aisément que la rotation de l'arbre 6 entraîne un mouvement basculant du levier 11. Un tel agencement est d'ailleurs décrit dans le document FR-A-90 15140 de la présente Demanderesse.On the shaft 6 are wedged two cams 7, 8 cooperating respectively with a roller 9, 10 mounted for free rotation at the end of the two V-shaped branches 11 a , 11 b of a lever 11 keyed onto a shaft 12. We easily understands that the rotation of the shaft 6 causes a rocking movement of the lever 11. Such an arrangement is moreover described in the document FR-A-90 15140 of the present Applicant.

Suivant l'invention, le levier 11 comporte un prolongement 11c dans les angles duquels sont montés deux axes 13, 14 autour desquels sont respectivement articulées l'une des extrémités d'une bielle 15, 16.According to the invention, the lever 11 has an extension 11c in duquels angles are mounted two axes 13, 14 around which are articulated respectively at one end of a connecting rod 15, 16.

Comme cela est bien connu dans la pratique, les cadres 2 et 3 sont animés d'un mouvement vertical de va-et-vient grace à la présence de deux leviers longs 17, 18 associés au cadre supérieur et par deux leviers courts 19, 20 articulés au cadre inférieur 3. En outre les leviers 17, 19 et 18, 20 sont montés oscillants par paire sur un balancier 21, 22 qui pivote autour d'un arbre 23, 24. Ces deux arbres sont disposés symétriquement par rapport au plan transversal du châssis 1 contenant l'axe géométrique de l'arbre 6.As is well known in practice, the frames 2 and 3 are driven in a vertical back and forth movement thanks to the presence of two long levers 17, 18 associated with the upper frame and by two short levers 19, 20 articulated to the lower frame 3. In addition the levers 17, 19 and 18, 20 are mounted oscillating in pairs on a balance 21, 22 which pivots around a shaft 23, 24. These two shafts are arranged symmetrically with respect to the transverse plane of the chassis 1 containing the geometric axis of the shaft 6.

On observe que le balancier 21 est pourvu d'une joue 21a orientée à l'opposé des cadres 2 et 3, tandis que le balancier 22 est muni d'une joue 22a tournée vers les cadres 2 et 3. Chaque joue 21a, 22a comprend un axe fixe 25, 26 autour duquel pivote la seconde extrémité des leviers 15, 16.It is observed that the balance 21 is provided with a cheek 21 a oriented opposite the frames 2 and 3, while the balance 22 is provided with a cheek 22 has turned towards the frames 2 and 3. Each cheek 21 has , 22 a comprises a fixed axis 25, 26 around which the second end of the levers 15, 16 pivots.

Bien entendu, les choses sont arrangées de manière que lors du basculement du levier 11, la rotation inverse des deux balanciers 21, 22 soit de même amplitude dans les deux sens.Of course, things are arranged so that during the tilting of the lever 11, the reverse rotation of the two pendulums 21, 22 is of the same amplitude in both directions.

Grâce à la disposition suivant l'invention, on note que les bielles 15 et 16 sont relativement courtes, de telle sorte qu'elles ne nuisent pas à un fonctionnement rapide de la mécanique du fait qu'ils n'engendrent aucune difficulté sur le plan de leur inertie, même si la longueur du châssis 1 dans le sens de la chaîne est très importante.Thanks to the arrangement according to the invention, it is noted that the connecting rods 15 and 16 are relatively short, so that they do not interfere with rapid operation of the mechanics because they do not cause any difficulty in terms of of their inertia, even if the length of the chassis 1 in the direction of the chain is very large.

Bien entendu et comme cela est bien connu, les extrémités des leviers 17, 18, 19, 20 qui coopèrent avec les balanciers 21 et 22 peuvent être placés à différentes positions dans des lumières 21b, 21c du balancier 21 et 22b, 22c de celui 22 afin de régler la course des cadres 2 et 3.Of course and as is well known, the ends of the levers 17, 18, 19, 20 which cooperate with the pendulums 21 and 22 can be placed in different positions in lights 21 b , 21 c of the pendulum 21 and 22 b , 22 c of that 22 in order to adjust the stroke of frames 2 and 3.

Claims (2)

Mécanisme de commande de mouvement en va-et-vient des cadres de griffes (2, 3) d'un dispositif de formation de la foule d'un métier à tisser du genre comportant des cames (7, 8) qui actionnent un levier oscillant (11) à deux branches (11a, 11b) en V calé sur un arbre (6), et comprenant en outre deux basculeurs (21, 22) auxquels sont associés des leviers d'actionnement (17, 18, 19, 20) desdits cadres de griffes, caractérisé en ce que ledit levier en V (11) comprend un prolongement (11c) dans les angles duquel sont prévues deux articulations (13, 14) pour les extrémités de deux bielles courtes (15, 16) dont les extrémités opposées sont respectivement articulées en opposition aux deux balanciers (21, 22).Mechanism for reciprocating movement of the claw frames (2, 3) of a crowd-forming device of a loom of the kind comprising cams (7, 8) which actuate an oscillating lever (11) with two branches (11 a , 11 b ) in V wedged on a shaft (6), and further comprising two rockers (21, 22) with which are associated actuation levers (17, 18, 19, 20 ) of said claw frames, characterized in that said V-shaped lever (11) comprises an extension (11 c ) in the angles of which two articulations (13, 14) are provided for the ends of two short connecting rods (15, 16) of which the opposite ends are respectively articulated in opposition to the two pendulums (21, 22). Mécanisme suivant la revendication 1, caractérisé en ce que le premier balancier (21) est pourvu d'une joue (21a) orientée à l'opposé des cadres (2, 3) et à laquelle l'une (15) des bielles courtes est articulée au moyen d'un axe (25), tandis que l'autre bielle (16) est articulée par un axe (26) à une joue (22a) de l'autre balancier (22) s'étendant en direction des cadres (2, 3).Mechanism according to claim 1, characterized in that the first balance (21) is provided with a cheek (21 a ) oriented opposite the frames (2, 3) and to which one (15) of the short connecting rods is articulated by means of an axis (25), while the other connecting rod (16) is articulated by an axis (26) to a cheek (22 a ) of the other balance (22) extending towards the frames (2, 3).
EP19930420177 1992-04-30 1993-04-27 Driving system for the reciprocating knife boxes of a loom dobby Expired - Lifetime EP0568473B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9205613 1992-04-30
FR9205613A FR2690696B1 (en) 1992-04-30 1992-04-30 COMPLIANCE MECHANISM OF CLAW FRAMES OF A CROWD FORMING DEVICE OF A WEAVING MATERIAL.

Publications (2)

Publication Number Publication Date
EP0568473A1 true EP0568473A1 (en) 1993-11-03
EP0568473B1 EP0568473B1 (en) 1999-12-22

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EP19930420177 Expired - Lifetime EP0568473B1 (en) 1992-04-30 1993-04-27 Driving system for the reciprocating knife boxes of a loom dobby

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EP (1) EP0568473B1 (en)
JP (1) JP3272097B2 (en)
DE (1) DE69327361T2 (en)
FR (1) FR2690696B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0671493A1 (en) * 1994-03-10 1995-09-13 Staubli-Verdol S.A. Driving system for the reciprocating knife boxes of a loom dobby
BE1017667A3 (en) * 2007-07-02 2009-03-03 Wiele Michel Van De Nv Jacquard device, has knife grid driving levers directly connected to eccentric shaft via drive rods in front and behind this device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102505244A (en) * 2011-10-28 2012-06-20 吴江市金迪喷织厂 Cutter bar connector for loom
CN102618989B (en) * 2012-03-28 2013-12-25 嵊州市盛通电子科技有限公司 Lifting knife transmission mechanism of jacquard
CN104480608B (en) * 2015-01-19 2016-02-10 李素凤 Swing mechanism in a kind of jacquard

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH111971A (en) * 1924-11-11 1925-12-16 Rueti Ag Maschf Double stroke jacquard machine.
DE1111115B (en) * 1956-07-31 1961-07-13 Erich Grosse Jaquard machine, in which the knife box and sinker base are driven by a crank gear
FR2528078A1 (en) * 1982-06-07 1983-12-09 Tagliabue Spa
EP0136244A1 (en) * 1983-08-26 1985-04-03 Staubli-Verdol S.A.R.L. Mechanism for the control of the knife boxes of dobbies
FR2669648A1 (en) * 1990-11-27 1992-05-29 Staubli Verdol ASSEMBLY FOR CONTROLLING THE MOVEMENT OF THE FRAMES OF A CROWD FORMING DEVICE SUCH AS AN ARMOR MECHANICS.
EP0409139B1 (en) * 1989-07-17 1993-12-08 N.V. Michel Van de Wiele System for driving the knife-holder of double-lift jacquards of open-shed type, and jacquards provided with such driving-system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH111971A (en) * 1924-11-11 1925-12-16 Rueti Ag Maschf Double stroke jacquard machine.
DE1111115B (en) * 1956-07-31 1961-07-13 Erich Grosse Jaquard machine, in which the knife box and sinker base are driven by a crank gear
FR2528078A1 (en) * 1982-06-07 1983-12-09 Tagliabue Spa
EP0136244A1 (en) * 1983-08-26 1985-04-03 Staubli-Verdol S.A.R.L. Mechanism for the control of the knife boxes of dobbies
EP0409139B1 (en) * 1989-07-17 1993-12-08 N.V. Michel Van de Wiele System for driving the knife-holder of double-lift jacquards of open-shed type, and jacquards provided with such driving-system
FR2669648A1 (en) * 1990-11-27 1992-05-29 Staubli Verdol ASSEMBLY FOR CONTROLLING THE MOVEMENT OF THE FRAMES OF A CROWD FORMING DEVICE SUCH AS AN ARMOR MECHANICS.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0671493A1 (en) * 1994-03-10 1995-09-13 Staubli-Verdol S.A. Driving system for the reciprocating knife boxes of a loom dobby
FR2717189A1 (en) * 1994-03-10 1995-09-15 Staubli Verdol Back and forth movement control mechanism of the claw frames of an armor mechanic.
BE1017667A3 (en) * 2007-07-02 2009-03-03 Wiele Michel Van De Nv Jacquard device, has knife grid driving levers directly connected to eccentric shaft via drive rods in front and behind this device

Also Published As

Publication number Publication date
FR2690696A1 (en) 1993-11-05
JPH0617347A (en) 1994-01-25
DE69327361D1 (en) 2000-01-27
JP3272097B2 (en) 2002-04-08
FR2690696B1 (en) 1995-06-23
DE69327361T2 (en) 2000-06-21
EP0568473B1 (en) 1999-12-22

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