EP0045759A1 - Improved device for the opening of the pitch on a loom. - Google Patents

Improved device for the opening of the pitch on a loom.

Info

Publication number
EP0045759A1
EP0045759A1 EP81900432A EP81900432A EP0045759A1 EP 0045759 A1 EP0045759 A1 EP 0045759A1 EP 81900432 A EP81900432 A EP 81900432A EP 81900432 A EP81900432 A EP 81900432A EP 0045759 A1 EP0045759 A1 EP 0045759A1
Authority
EP
European Patent Office
Prior art keywords
blades
plate
electromagnets
blade
order
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
EP81900432A
Other languages
German (de)
French (fr)
Other versions
EP0045759B1 (en
Inventor
Paul Sage
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 Verdol SA
Original Assignee
Verdol SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Verdol SA filed Critical Verdol SA
Publication of EP0045759A1 publication Critical patent/EP0045759A1/en
Application granted granted Critical
Publication of EP0045759B1 publication Critical patent/EP0045759B1/en
Expired 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
    • D03C3/20—Electrically-operated jacquards
    • 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

Definitions

  • the present invention relates to improvements made to the devices for opening the step of a loom for shaped fabrics and more particularly, although not exclusively, for silk fabrics.
  • the improvements which are the subject of the present invention aim to allow the production of a device for controlling warp threads on a weaving loom in order to operate the opening of the pitch from information coming from perforated paper, magnetic tape or the like whose size is reduced so that it can control a very large number of heddles arranged vertically close to each other, its cost remaining fairly low.
  • the invention also relates to a device of the kind in question which can be divided into modules which can be separated from one another so that if the density of wires in fabric chain is reduced it is possible to eliminate a certain number of modules without having to dismantle the whole harness.
  • the heddles do not all have a vertical orientation, they are on the contrary slightly oblique but without this inclination playing an unfavorable role relative to the crowd in the open position.
  • the blades associated with the beams pass through a first plate provided with bars and a second plate provided with openings, these blades each carrying a shoe and a hook, this shoe always being in abutment against the second plate so that the translation of the latter causes the beams to descend, while the bars of the first grab the hooks of the selected blades when the first plate is moved in order to lift the selected beams, means being further provided for escaping the hooks of the blades not selected.
  • the shaped fabrics which one envisages to manufacture in a mechanized way are generally established starting from fine threads and delicate materials such as silk, it is necessary to reduce as much as possible the tension of these threads at the time of opening step to avoid permanent deformation.
  • the lift and lower system is used, that is to say a layer of warp threads is lifted while the other threads are lowered by the same amount equal to the half height of the crowd. It is thus possible to obtain high quality shaped fabrics because the down and lift strokes being equal all the threads undergo the same tension.
  • FIG. 1 is a schematic view of a control device established in accordance with the invention in the closed crowd position.
  • Fig. 2 to 6 illustrate the main operating phases of the device according to the invention, including those corresponding to a preferred variant.
  • Fig. 7 is a view similar to that of FIG. 1, but showing the device in the open crowd position.
  • Fig. 8 and 9 illustrate the positions of the plates for respectively leveled and oblique crowds.
  • Fig. 10 to 12 correspond to fig. 4 to 6 but illustrate a variant.
  • a device in the closed position of the crowd.
  • This device comprises a harness composed of a number of heddles 1 in the eyelets la from each of which passes a warp thread 2.
  • the upper end of each of the heddles 1 is associated with an arch 3, while its lower end is connected to the frame by means of elastic bands referenced 0 or other similar devices.
  • the arches have vertical parts 3a and horizontal parts 3b thanks to the presence of return pulleys 4.
  • the end of the horizontal part 3b of each arch is associated with a metal blade 5 carrying a shoe 6 and a hook 7.
  • each blade opposite to that which is joined to the arch is free; but it is supported by a perforated base 8 in which the blades slide freely.
  • Each of the blades still passes through a first plate 9 provided with bars 10 with the underside of which the blades are in support. The latter also pass freely through perforations 11a of a second plate 11.
  • the first plate 9 is used to lift the healds 1, while the second 11 is intended to allow their lowering.
  • the first plate 9 comprises actuating rods 12 guided by bearings 13 and which are articulated by one of their ends to said plate, while their opposite end is associated with a cam 14 by means of a roller 15 circulating in a groove 14a. of this cam. The latter is arranged so that by turning it causes a displacement x to the right in FIG. 1 of tray 9.
  • the plate 11 is associated with operating rods 16 passing through guides 17 and one of which of the ends is articulated to the plate in question while the other carries a roller 18 which cooperates with a groove 19a formed in a cam 19.
  • the rotation of the latter causes a translation y to the left of the plate 11 for reasons that will explain better later.
  • x y.
  • the base 8 supports electromagnets 20 disposed at the end of straight supports 21. It is arranged to give each blade a slight upward arch at the start so that it bears elastically against the underside of each bar 10.
  • the operation follows from the foregoing explanations.
  • the energization of a certain number of the electromagnets 20 takes place according to the selection which is obtained either from a perforated paper or from a magnetic tape or any other system.
  • the blades 5 which correspond to the electromagnets 20 called are deformed downwards so that their hook 7 comes to be disposed below the bar 10 of the plate 9.
  • the blades which correspond to the non-powered electromagnets remain in place.
  • the synchronized rotation of the cams 14 and 19 causes, as explained above, the displacement of the plates 9 and 11 respectively to the right and to the left. I1 goes without saying that the heddles corresponding to the blades called by the electromagnets are not interested in the movement of the plate 9.
  • the plate 23 is reassembled so that the blades not retained by the electromagnets return to the position illustrated in FIG. 5. Thanks to the plate 23, it is thus possible to reduce the power of the electromagnets which no longer have to perform the call for the blades but only their retention. This is also an important safety factor.
  • the two plates 9 and 11 cause the pitch to open according to the selection established as illustrated in FIG. 7, in order to allow the insertion of the frame. They then resume their initial position shown in fig. 1, the step then being closed. The cycle is renewed each time with the defined selection corresponding to the designs to be obtained on the fabric. We observe that plate 23 has been shown in this figure.
  • the lift 9 and drop 11 plates ensuring the movement of the elastic blades can be moved parallel to themselves as illustrated in FIG. 8 in order to obtain a leveled crowd or else they can be in their extreme position in an oblique position as illustrated in FIG. 9 which leads to an oblique crowd. It is also possible to modify the stroke of the plates to obtain variations in crowd height, for example by changing the cams 14 and 19.
  • the trays have been provided vertical for accessibility reasons because this arrangement allows the user to easily change a defective blade or yoke without having to dismantle the entire harness.
  • the plates in question could be provided horizontal, this position causing the removal of the pulleys 4.
  • the device could be split, that is to say that the plates 9, 11, the plate 23 and the box spring 8 would be produced in the form of modules of small width mounted on slides. It would thus be possible to eliminate certain modules and the corresponding part of the harness when the density of the warp threads is reduced.
  • each blade has a projection or hump 5a which abuts against the corresponding bar 10 of the first plate 9.
  • the plate 11 is in its extreme position (to the right in the figures considered) it brings the bump 5a into contact with the bar 10 to press the blade against one electromagnet 20, since said plate drives the shoe 6 to the right.
  • a device for opening the pitch of warp threads in a weaving loom has thus been produced, making it possible to obtain a fabric shaped with very fine patterns and which has remarkable reliability.

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

Abstract

Les Lames (5) traversent un premier plateau (9) pourvu de barrettes (10) et un second plateau (11) muni de perforations (11a). Les lames portent chacune un sabot (6) et un crochet (7). Quand les electro-aimants (20) attirent les lames (5) les crochets des lames non-appelees sont deplaces par le plateau (9) et les crochets des lames appelees suivent la translation du plateau (11) pour ouvrir le pas par leve et baisse des fils de chaine (22). Tissage de tissus faconnes.The Blades (5) pass through a first plate (9) provided with bars (10) and a second plate (11) provided with perforations (11a). The blades each carry a shoe (6) and a hook (7). When the electromagnets (20) attract the blades (5) the hooks of the non-called blades are moved by the plate (9) and the hooks of the called blades follow the translation of the plate (11) to open the step by lifting and lowering of the warp threads (22). Weaving of shaped fabrics.

Description

Dispositif perfectionné d'ouverture du pas sur un métier à tisserImproved device for opening the pitch on a loom
La présente invention est relative à des perfectionnements apportés aux dispositifs d'ouverture du pas d'un métier pour tissus façonnés et plus particulièrement, bien que non exclusivement, pour des étoffes de soie.The present invention relates to improvements made to the devices for opening the step of a loom for shaped fabrics and more particularly, although not exclusively, for silk fabrics.
On sait que pour réaliser des tissus à motifs très larges et à densité importante de fils en chaîne tels que les tableaux, tapisseries ou autres gravures, on utilise jusqu'à présent des métiers manuels. Cette méthode de fabrication entraîne évidemment des frais considérables de main d'oeuvre et des délais de fabrication très longs.It is known that to make fabrics with very wide patterns and with a high density of warp threads such as paintings, tapestries or other engravings, manual looms have so far been used. This manufacturing method obviously involves considerable labor costs and very long manufacturing times.
Si l'on désire fabriquer de tels tissus sur des métiers mécanisés, il est nécessaire de prévoir un nombre important de mécaniques usuelles Jacquard ou Verdol susceptibles d'ouvrir le pas pour permettre le passage des fils de trame ou duites. Si l'on envisage la fabrication d'un tissu comportant 10000 fils de chaîne pour un métier de 140 cm de large, la commande des lisses propres à ouvrir le pas devra être faite par un nombre de mécaniques variant entre 8 et 10. On comprend aisément qu'un tel nombre de ces dispositifs ne soit pas compatible avec l'espace disponible au-dessus d'un métier de 140 cm de large et qu'en plus la commande synchronisée de ces mécaniques ne pourrait être obtenue qu'au prix d'une installation complexe. Enfin le coût d'un tel aménagement serait prohibitif.If it is desired to manufacture such fabrics on mechanized looms, it is necessary to provide a large number of usual Jacquard or Verdol machines capable of opening the pitch to allow the passage of weft threads or picks. If we envisage the manufacture of a fabric comprising 10,000 warp threads for a 140 cm wide loom, the control of the healds suitable for opening the pitch will have to be made by a number of mechanics varying between 8 and 10. We understand easily that such a number of these devices is not compatible with the space available above a 140 cm wide loom and that in addition synchronized control of these mechanics could only be obtained at the cost of 'a complex installation. Finally, the cost of such an arrangement would be prohibitive.
Les perfectionnements qui font l'objet de la présente invention visent à permettre la réalisation d'un dispositif de commande des fils de chaîne sur un métier à tisser en vue d'opérer l'ouverture du pas à partir d'une information provenant d'un papier perforé, d'une bande magnétique ou analogue dont l'encombrement soit réduit de manière qu'il puisse commander un nombre très important de lisses disposées verticalement les unes près des autres, son prix de revient demeurant assez bas.The improvements which are the subject of the present invention aim to allow the production of a device for controlling warp threads on a weaving loom in order to operate the opening of the pitch from information coming from perforated paper, magnetic tape or the like whose size is reduced so that it can control a very large number of heddles arranged vertically close to each other, its cost remaining fairly low.
L'invention vise encore un dispositif du genre en question qui puisse être divisé en modules séparables les uns des autres de telle sorte que si la densité de fils en chaîne du tissu est réduite il soit possible d'éliminer un certain nombre de modules sans avoir à démonter tout le harnais. Lorsque par exemple un module sur deux est démonté ou tout au moins éliminé, les lisses ne présentent pas toutes une orientation verticale, elles sont au contraire légèrement obliques mais sans que cette inclinaison joue un rôle défavorable par rapport à la foule en position ouverte.The invention also relates to a device of the kind in question which can be divided into modules which can be separated from one another so that if the density of wires in fabric chain is reduced it is possible to eliminate a certain number of modules without having to dismantle the whole harness. When, for example, one module out of two is dismantled or at least eliminated, the heddles do not all have a vertical orientation, they are on the contrary slightly oblique but without this inclination playing an unfavorable role relative to the crowd in the open position.
Conformément à l'invention, les lames associées aux lisses traversent un premier plateau pourvu de barrettes et un second plateau muni d'ouvertures, ces lames portant chacune un sabot et un crochet, ce sabot étant toujours en appui contre le second plateau de manière que la translation de celui-ci entraîne la descente des lisses, tandis que les barrettes du premier saisissent les crochets des lames sélectionnées lorsque le premier plateau est déplacé afin de lever les lisses sélectionnées, des moyens étant en outre prévus pour faire échapper les crochets des lames non sélectionnées.According to the invention, the blades associated with the beams pass through a first plate provided with bars and a second plate provided with openings, these blades each carrying a shoe and a hook, this shoe always being in abutment against the second plate so that the translation of the latter causes the beams to descend, while the bars of the first grab the hooks of the selected blades when the first plate is moved in order to lift the selected beams, means being further provided for escaping the hooks of the blades not selected.
Etant donné que les tissus façonnés qu'on envisage de fabriquer de manière mécanisée sont généralement établis à partir de fils fins et de matières délicates telles que la soie, il est nécessaire de diminuer au maximum la tension de ces fils au moment de 1'ouverture du pas afin d 'éviter des déformations permanentes. Pour ce faire on utilise le système de lève et baisse c'est-à-dire qu'une nappe de fils de chaîne est levée tandis que les autres fils sont abaissés d'une même quantité égale à la demi-hauteur de la foule. On peut ainsi obtenir des tissus façonnés de haute qualité du fait que les courses de baisse et de lève étant égales tous les fils subissent la même tension.Since the shaped fabrics which one envisages to manufacture in a mechanized way are generally established starting from fine threads and delicate materials such as silk, it is necessary to reduce as much as possible the tension of these threads at the time of opening step to avoid permanent deformation. To do this, the lift and lower system is used, that is to say a layer of warp threads is lifted while the other threads are lowered by the same amount equal to the half height of the crowd. It is thus possible to obtain high quality shaped fabrics because the down and lift strokes being equal all the threads undergo the same tension.
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 Fig. 1 est une vue schématique d'un dispositif de commande établi conformément à l'invention en position de foule fermée.The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing. 1 is a schematic view of a control device established in accordance with the invention in the closed crowd position.
Fig. 2 à 6 illustrent les phases principales de fonctionnement du dispositif suivant l'invention y compris celles correspondant à une variante préférée. Fig. 7 est une vue semblable à celle de fig..1, mais montrant le dispositif à la position de foule ouverte. Fig. 8 et 9 illustrent les positions des plateaux pour des foules respectivement nivelées et obliques. Fig. 10 à 12 correspondent à fig. 4 à 6 mais illustrent une variante.Fig. 2 to 6 illustrate the main operating phases of the device according to the invention, including those corresponding to a preferred variant. Fig. 7 is a view similar to that of FIG. 1, but showing the device in the open crowd position. Fig. 8 and 9 illustrate the positions of the plates for respectively leveled and oblique crowds. Fig. 10 to 12 correspond to fig. 4 to 6 but illustrate a variant.
On a représenté en fig. 1 un dispositif suivant l'invention à la position fermée de la foule. Ce dispositif comprend un harnais composé d'un certain nombre de lisses 1 dans les oeillets la de chacune desquelles passe un fil de chaîne 2. L'extrémité supérieure de chacune des lisses 1 est associée à une arcade 3, tandis que son extrémité inférieure est reliée au bâti par l'intermédiaire d'élastiques référencés 0 ou autres dispositifs analogues. Comme illustré sur la figure considérée les arcades comportent des parties verticales 3a et des parties horizontales 3b grâce à la présence de poulies de renvoi 4. L'extrémité de la partie horizontale 3b de chaque arcade est associée à une lame métallique 5 portant un sabot 6 et un crochet 7. L ' extrémité de chaque lame opposée à celle qui est réunie à l'arcade est libre; mais elle est soutenue par un sommier perforé 8 dans lequel les lames coulissent librement. Chacune des lames passe encore dans un premier plateau 9 pourvu de barrettes 10 avec le dessous desquelles les lames sont en appui. Ces dernières traversent aussi librement des perforations 11a d'un second plateau 11. Comme on l'expliquera mieux plus loin, le premier plateau 9 est utilisé pour lever les lisses 1, tandis que le second 11 est destiné à permettre leur abaissement. On observe que le premier plateau 9 comporte des tiges d ' actionnement 12 guidées par des paliers 13 et qui sont articulées par l'une de leurs extrémités audit plateau, tandis que leur extrémité opposée est associée à une came 14 par l'intermédiaire d'un galet 15 circulant dans une rainure 14a. de cette came. Cette dernière est agencée de manière qu'en tournant elle provoque un déplacement x vers la droite en fig. 1 du plateau 9.There is shown in fig. 1 a device according to the invention in the closed position of the crowd. This device comprises a harness composed of a number of heddles 1 in the eyelets la from each of which passes a warp thread 2. The upper end of each of the heddles 1 is associated with an arch 3, while its lower end is connected to the frame by means of elastic bands referenced 0 or other similar devices. As illustrated in the figure considered, the arches have vertical parts 3a and horizontal parts 3b thanks to the presence of return pulleys 4. The end of the horizontal part 3b of each arch is associated with a metal blade 5 carrying a shoe 6 and a hook 7. The end of each blade opposite to that which is joined to the arch is free; but it is supported by a perforated base 8 in which the blades slide freely. Each of the blades still passes through a first plate 9 provided with bars 10 with the underside of which the blades are in support. The latter also pass freely through perforations 11a of a second plate 11. As will be better explained below, the first plate 9 is used to lift the healds 1, while the second 11 is intended to allow their lowering. It is observed that the first plate 9 comprises actuating rods 12 guided by bearings 13 and which are articulated by one of their ends to said plate, while their opposite end is associated with a cam 14 by means of a roller 15 circulating in a groove 14a. of this cam. The latter is arranged so that by turning it causes a displacement x to the right in FIG. 1 of tray 9.
De manière semblable le plateau 11 est associé à des tiges de manoeuvre 16 traversant des guidages 17 et dont une des extrémités est articulée au plateau considéré tandis que l'autre porte un galet 18 qui coopère avec une rainure 19a ménagée dans une came 19. La rotation de celle-ci provoque une translation y vers la gauche du plateau 11 pour des raisons qu'on expliquera mieux plus loin. De manière avantageuse et pour les raisons expliquées plus haut on choisit x = y.Similarly, the plate 11 is associated with operating rods 16 passing through guides 17 and one of which of the ends is articulated to the plate in question while the other carries a roller 18 which cooperates with a groove 19a formed in a cam 19. The rotation of the latter causes a translation y to the left of the plate 11 for reasons that will explain better later. Advantageously and for the reasons explained above, we choose x = y.
On note que le sommier 8 supporte des électro-aimants 20 disposés à l'extrémité de supports rectiliges 21. On s ' arrange pour donner au départ à chaque lame une légère cambrure vers le haut de manière qu'elle appuie élastiquement contre la face inférieure de chaque barrette 10.It is noted that the base 8 supports electromagnets 20 disposed at the end of straight supports 21. It is arranged to give each blade a slight upward arch at the start so that it bears elastically against the underside of each bar 10.
En fig. 1 on observe que la foule est fermée, c'est-à-dire que tous les oeillets la des lisses 1 se trouvent dans un même plan horizontal, les différents fils de chaîne 2 étant tous contenus dans ledit plan. Par suite du rappel élastique vers le bas des lisses les sabots 6 reposent contre la face de droite du second plateau 11 du fait qu'ils présentent une section transversale supérieure à celle des ouvertures lia de ce plateau par lesquelles les lames 5 le traversent. Les crochets 7 sont alors disposés un peu à droite de la face biseautée 10a de chaque barrette 10.In fig. 1 we observe that the crowd is closed, that is to say that all the eyelets of the healds 1 are in the same horizontal plane, the different warp threads 2 being all contained in said plane. As a result of the elastic return towards the bottom of the heddles, the shoes 6 rest against the right face of the second plate 11 because they have a cross section greater than that of the openings 11a of this plate through which the blades 5 pass through it. The hooks 7 are then placed a little to the right of the bevelled face 10a of each bar 10.
Le fonctionnement découle des explications qui précèdent La mise sous tension d'un certain nombre des électroaimants 20 a lieu selon la sélection qui est obtenue soit à partir d'un papier perforé soit à partir d'une bande magnétique ou tout autre système. Comme on l'a représenté en fig. 2 les lames 5 qui correspondent aux électro-aimants 20 appelés sont déformées vers le bas de telle sorte que leur crochet 7 vient se disposer en dessous de la barrette 10 du plateau 9. Par contre les lames qui correspondent aux électro-aimants non alimentés restent en place. La rotation synchronisée des cames 14 et 19 provoque comme on l'a explique précédemment le déplacement des plateaux 9 et 11 respectivement vers la droite et vers la gauche. I1 va de soi qu'alors les lisses correspondant aux lames appelées par les électro-aimants ne sont pas intéressées par le déplacement du plateau 9. Par contre la translation du plateau 11 assure le déplacement vers le bas de ces lisses du fait de l'influence des élastiques 0 car les sabots des lames 5 restent en contact avec celui-ci lors de la translation considérée. Au contraire les lames qui n'ont pas été appelées par les électro-aimants sont déplacées vers la droite par coopération des extrémités biseautées 10a des barrettes 10 avec les crochets 7. De manière à laisser le moins longtemps possible les électro-aimants sous tension l'alimentation est automatiquement coupée dès que le plateau 9 a commencé son déplacernent vers la droite de sorte que lors de la cessation de l'alimentation, le crochet 7 ne soit pas pris par cette barrette mais vienne prendre appui contre sa face inférieure comme illustré en fig. 3.The operation follows from the foregoing explanations. The energization of a certain number of the electromagnets 20 takes place according to the selection which is obtained either from a perforated paper or from a magnetic tape or any other system. As shown in fig. 2 the blades 5 which correspond to the electromagnets 20 called are deformed downwards so that their hook 7 comes to be disposed below the bar 10 of the plate 9. On the other hand the blades which correspond to the non-powered electromagnets remain in place. The synchronized rotation of the cams 14 and 19 causes, as explained above, the displacement of the plates 9 and 11 respectively to the right and to the left. I1 goes without saying that the heddles corresponding to the blades called by the electromagnets are not interested in the movement of the plate 9. By against the translation of the plate 11 ensures the downward movement of these heddles due to the influence of the elastic bands 0 because the shoes of the blades 5 remain in contact with the latter during the translation in question. On the contrary, the blades which have not been called by the electromagnets are moved to the right by cooperation of the bevelled ends 10a of the bars 10 with the hooks 7. So as to leave the electromagnets energized for the shortest possible time l the feed is automatically cut off as soon as the plate 9 has started to move to the right so that when the feed ceases, the hook 7 is not taken up by this bar but comes to bear against its lower face as illustrated in fig. 3.
En vue d'améliorer le fonctionnement général de l'ensemble on prévoit comme illustré en fig. 4 à 6 que toutes les lames 5 traversent une plaque 23 dans des trous oblongs 23a de celle-ci, leur hauteur étant nettement plus importante que le déplacement en hauteur des lames de leur position libre à celle en appui sur les électro-aimants 20. On a illustré en fig. 4 le rôle de la plaque 23. Juste avant l'instant où les électro-aimants sont alimentés on provoque sa descente par l'intermédiaire d'un mécanisme non représenté de telle sorte que l'arête supérieure des trous 23a agit sur toutes les lames pour les amener en contact avec les électro-aimants. Au moment de l'alimentation de certains de ceux- ci les lames correspondantes sont rendues solidaires des électro-aimants tandis que les autres sont simplement en appui sur eux. Puis la plaque 23 est remontée de manière que les lames non retenues par les électro-aimants reviennent à la position illustré en fig. 5. Grâce à la plaque 23 on peut ainsi réduire la puissance des électro-aimants qui n'ont plus à effectuer l'appel des lames mais seulement leur retenue. Ceci constitue en outre un important facteur de sécurité.In order to improve the general functioning of the assembly, provision is made, as illustrated in FIG. 4 to 6 that all of the blades 5 pass through a plate 23 in oblong holes 23a thereof, their height being much greater than the displacement in height of the blades from their free position to that resting on the electromagnets 20. Illustrated in fig. 4 the role of the plate 23. Just before the moment when the electromagnets are supplied, it is lowered by means of a mechanism not shown so that the upper edge of the holes 23a acts on all the blades to bring them into contact with the electromagnets. When some of these are fed, the corresponding blades are made integral with the electromagnets while the others are simply supported on them. Then the plate 23 is reassembled so that the blades not retained by the electromagnets return to the position illustrated in FIG. 5. Thanks to the plate 23, it is thus possible to reduce the power of the electromagnets which no longer have to perform the call for the blades but only their retention. This is also an important safety factor.
Par leurs mouvements inversés les deux plateaux 9 et 11 provoquent l'ouverture du pas selon la sélection établie comme illustré en fig. 7, en vue de permettre l'insertion de la trame. Ils reprennent ensuite leur position initiale représentée en fig. 1, le pas étant alors refermé. Le cycle se renouvelle chaque fois avec la sélection définie correspondant aux dessins à obtenir sur le tissu. On observe qu'on a représenté la plaque 23 sur cette figure.By their reverse movements, the two plates 9 and 11 cause the pitch to open according to the selection established as illustrated in FIG. 7, in order to allow the insertion of the frame. They then resume their initial position shown in fig. 1, the step then being closed. The cycle is renewed each time with the defined selection corresponding to the designs to be obtained on the fabric. We observe that plate 23 has been shown in this figure.
Les plateaux de lève 9 et de baisse 11 assurant le mouvement des lames élastiques peuvent être déplacés parallèlement à eux-mêmes comme illustré en fig. 8 en vue d'obtenir une foule nivelée ou bien ils peuvent se trouver à leur position extrême dans une position oblique comme illustré en fig. 9 ce qui entraîne l'obtention d'un foule oblique. On peut également modifier la course des plateaux pour obtenir des variations de hauteur de foule par exemple en changeant les cames 14 et 19.The lift 9 and drop 11 plates ensuring the movement of the elastic blades can be moved parallel to themselves as illustrated in FIG. 8 in order to obtain a leveled crowd or else they can be in their extreme position in an oblique position as illustrated in FIG. 9 which leads to an oblique crowd. It is also possible to modify the stroke of the plates to obtain variations in crowd height, for example by changing the cams 14 and 19.
Sur les exemples illustrés ci-dessus les plateaux ont été prévus verticaux pour des raisons d'accessibilité car cette disposition permet à l'utilisateur de changer facilement une lame ou une arcade défectueuse sans avoir à démonter tout le harnais. I1 va naturellement de soi que les plateaux en question pourraient être prévus horizontaux, cette position entraînant la suppression des poulies 4. Comme indiqué au début des présentes, le dispositif pourrait être fractionné c'est-à-dire que les plateaux 9, 11, la plaque 23 et le sommier 8 seraient réalisés sous la forme de modules de faible largeur montés sur des glissières On pourrait ainsi éliminer certains modules et la partie correspondante du harnais lorsque la densité des fils de chaîne est réduite.In the examples illustrated above, the trays have been provided vertical for accessibility reasons because this arrangement allows the user to easily change a defective blade or yoke without having to dismantle the entire harness. I1 naturally goes without saying that the plates in question could be provided horizontal, this position causing the removal of the pulleys 4. As indicated at the beginning of the present document, the device could be split, that is to say that the plates 9, 11, the plate 23 and the box spring 8 would be produced in the form of modules of small width mounted on slides. It would thus be possible to eliminate certain modules and the corresponding part of the harness when the density of the warp threads is reduced.
Comme illustré en fig. 10 à 12, et en vue de diminuer le nombre des pièces en mouvement, on pourrait supprimer la plaque 23, illustrée en fig. 4 à 6, et provoquer l'appui des lames 5 contre les électro-aimants 20 par un moyen beaucoup plus simple. A cet effet, comme illustré en fig. 10 à 12, on fait comporter à chaque lame une saillie ou bosse 5a, qui vient buter contre la barrette correspondante 10 du premier plateau 9. De cette façon lorsque le plateau 11 est à sa position extrême (vers la droite dans les figures considérées) il amène la bosse 5a en contact avec la barrette 10 pour plaquer la lame contre 1 'électro-aimant 20, puisque ledit plateau entraîne le sabot 6 vers la droite.As illustrated in fig. 10 to 12, and in order to reduce the number of moving parts, the plate 23, illustrated in FIG. 4 to 6, and cause the support of the blades 5 against the electromagnets 20 by a much simpler means. To this end, as illustrated in fig. 10 to 12, each blade has a projection or hump 5a which abuts against the corresponding bar 10 of the first plate 9. In this way when the plate 11 is in its extreme position (to the right in the figures considered) it brings the bump 5a into contact with the bar 10 to press the blade against one electromagnet 20, since said plate drives the shoe 6 to the right.
Grâce à cette disposition, on peut obtenir des vitesses beaucoup plus importantes sans qu'aucune vibration ne soit engendrée.Thanks to this arrangement, it is possible to obtain much higher speeds without any vibration being generated.
On a ainsi réalisé un dispositif d'ouverture du pas des fils de chaîne d'un métier à tisser permettant l'obtention d'un tissu façonné à motifs très fins et qui comporte une remarquable fiabilité.A device for opening the pitch of warp threads in a weaving loom has thus been produced, making it possible to obtain a fabric shaped with very fine patterns and which has remarkable reliability.
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 dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents. It should moreover be understood that the foregoing description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents.

Claims

R E V E N D I C A T I O N S
1. Dispositif de commande des fils de chaîne d'un métier à tisser en vue d'opérer l'ouverture du pas par l'intermédiaire de lisses à partir d'une information donnée par un papier perforé ou analogue, du genre comprenant un mécanisme de sélection de lames solidaires de lisses qui sont rappelées elastiquement ou autrement, caractérisé en ce que les lames (5) traversent un premier plateau (9) pourvu de barrettes (10) ainsi qu'un second plateau (11) muni de perforations (l1a), ces lames (5) portant chacune un sabot (6) et un crochet (7), ledit sabot (6) étant toujours en appui contre le second plateau (11) de manière que la trans lation de celui-ci entraîne la descente des lisses (1), tandis que les barrettes (10) du premier plateau (9) saisissent les crochets (7) des lames (5) sélectionnées lorsque ce premier plateau (9) est déplacé afin de lever les lisses (1) correspondantes, des moyens (20), (23) étant prévus pour faire échapper les crochets (7) des lames (5) non sélectionnées.1. Device for controlling the warp threads of a weaving loom in order to operate the opening of the pitch by means of heddles from information given by a perforated paper or the like, of the type comprising a mechanism for selecting blades integral with beams which are resiliently or otherwise recalled, characterized in that the blades (5) pass through a first plate (9) provided with bars (10) as well as a second plate (11) provided with perforations (l1a ), these blades (5) each carrying a shoe (6) and a hook (7), said shoe (6) always being in abutment against the second plate (11) so that the translation of the latter causes the descent healds (1), while the bars (10) of the first plate (9) grip the hooks (7) of the blades (5) selected when this first plate (9) is moved in order to lift the corresponding healds (1), means (20), (23) being provided for escaping the hooks (7) of the blades (5) not selected.
2. Dispositif suivant la revendication 1, caractérisé en ce que les moyens de faire échapper les crochets (7) des lames (5) non sélectionnées sont réalisés sous la forme d' électro-aimants (20) qui déforment les lames (5) de ces lisses (1).2. Device according to claim 1, characterized in that the means for escaping the hooks (7) of the blades (5) not selected are made in the form of electromagnets (20) which deform the blades (5) these smooth (1).
3. Dispositif suivant la revendication 2, caractérisé en ce que les éléments (20) relâchent les lames (5) des lisses (1) non sélectionnées après le début du déplacement du premier plateau (9).3. Device according to claim 2, characterized in that the elements (20) release the blades (5) of the heddles (1) not selected after the start of movement of the first plate (9).
4. Dispositif suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que les lames (5) sont guidées par un sommier perforé (8) auquel les électro-aimants (20) sont assemblés.4. Device according to any one of claims 1 to 3, characterized in that the blades (5) are guided by a perforated base (8) to which the electromagnets (20) are assembled.
5. Dispositif suivant la revendication 4, caractérisé en ce qu'une plaque (23) que traversent les lames (5) est prévue à proximité des électro-aimants (20) en vue d'appliquer celles-ci sur ces derniers afin que lesdits électro-aimants n'aient à développer qu'une force réduite correspondant seulement à celle de maintien des lames (5).5. Device according to claim 4, characterized in that a plate (23) through which the blades (5) is provided near the electromagnets (20) in order to apply them on the latter so that said electromagnets only have to develop a corresponding reduced force only to that for holding the blades (5).
6. Dispositif suivant la revendication 5, caractérisé en ce que le déplacement des plateaux (9, 11) s'effectue de manière non parallèle à leur position initiale afin de permettre la constituttion d'une foule oblique.6. Device according to claim 5, characterized in that the displacement of the plates (9, 11) is carried out in a manner not parallel to their initial position in order to allow the constitution of an oblique crowd.
7. Dispositif suivant la revendication 6, caractérisé en ce que les plateaux (9,11) et la plaque (23) sont orientés verticalement, les lames (5) étant horizontales tandis que les arcades (3) sont en partie horizontale (3b), en partie verticale (3a) au moyen d'un renvoi approprié (4), leur partie verticale (3a) étant associée à une lisse (1).7. Device according to claim 6, characterized in that the plates (9,11) and the plate (23) are oriented vertically, the blades (5) being horizontal while the arches (3) are partly horizontal (3b) , in vertical part (3a) by means of an appropriate return (4), their vertical part (3a) being associated with a heald (1).
8. Dispositif suivant l'une quelconque des revendications précédentes caractérisé en ce qu'il se compose de modules placés côte-à-côte. 8. Device according to any one of the preceding claims, characterized in that it consists of modules placed side by side.
9. Dispositif suivant la revendication 4, caractérisé en ce que chaque lame (5) est pouvue d'une saillie ( 5a) qui, lors de la translation axiale de la lame (5) vient buter contre la barrette (10) correspondante du premier plateau (9) en vue d'appliquer cette lame (5) contre 1 ' électroaimant (20) afin qu'il n'ait à développer qu'une force réduite correspondant seulement à celle de maintien de la lame. 9. Device according to claim 4, characterized in that each blade (5) is puue of a projection (5a) which, during the axial translation of the blade (5) abuts against the bar (10) corresponding to the first plate (9) in order to apply this blade (5) against one electromagnet (20) so that it only has to develop a reduced force corresponding only to that of holding the blade.
EP81900432A 1980-02-22 1981-02-17 Improved device for the opening of the pitch on a loom Expired EP0045759B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8004281 1980-02-22
FR8004281A FR2476694A1 (en) 1980-02-22 1980-02-22 IMPROVED DEVICE FOR OPENING THE STEP ON A WEAVING

Publications (2)

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EP0045759A1 true EP0045759A1 (en) 1982-02-17
EP0045759B1 EP0045759B1 (en) 1984-08-15

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EP81900432A Expired EP0045759B1 (en) 1980-02-22 1981-02-17 Improved device for the opening of the pitch on a loom

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US (1) US4416310A (en)
EP (1) EP0045759B1 (en)
JP (1) JPH0372732B2 (en)
BE (1) BE887591A (en)
DE (1) DE3165478D1 (en)
FR (1) FR2476694A1 (en)
IT (1) IT1135534B (en)
WO (1) WO1981002434A1 (en)

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Also Published As

Publication number Publication date
FR2476694B1 (en) 1982-03-05
JPS57500111A (en) 1982-01-21
DE3165478D1 (en) 1984-09-20
FR2476694A1 (en) 1981-08-28
JPH0372732B2 (en) 1991-11-19
BE887591A (en) 1981-06-15
EP0045759B1 (en) 1984-08-15
WO1981002434A1 (en) 1981-09-03
US4416310A (en) 1983-11-22
IT1135534B (en) 1986-08-27
IT8119848A0 (en) 1981-02-19

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