EP1743058A1 - Level adjustment device, cam harness mounting mechanism incorporating said device and weaving machine fitted with said mechanism - Google Patents

Level adjustment device, cam harness mounting mechanism incorporating said device and weaving machine fitted with said mechanism

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Publication number
EP1743058A1
EP1743058A1 EP05744362A EP05744362A EP1743058A1 EP 1743058 A1 EP1743058 A1 EP 1743058A1 EP 05744362 A EP05744362 A EP 05744362A EP 05744362 A EP05744362 A EP 05744362A EP 1743058 A1 EP1743058 A1 EP 1743058A1
Authority
EP
European Patent Office
Prior art keywords
eccentric
axis
weaving
levers
shaft
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
EP05744362A
Other languages
German (de)
French (fr)
Other versions
EP1743058B1 (en
Inventor
Jean-Pierre Pages
Patrick Iltis
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
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
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Application filed by Staubli Faverges SCA filed Critical Staubli Faverges SCA
Publication of EP1743058A1 publication Critical patent/EP1743058A1/en
Application granted granted Critical
Publication of EP1743058B1 publication Critical patent/EP1743058B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
    • D03C5/02—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices operated by rotating cams
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
    • D03C5/005—Leveling mechanisms

Definitions

  • the invention relates to a device for leveling the position of the frames of a weaving loom equipped with a cam-armor mechanism.
  • the invention also relates to an armor mechanism comprising such a device as well as to a loom equipped with such a mechanism.
  • camshaft mechanics are known which include a series of oscillating levers in number equal to that of the heald frames to be mounted on the loom, each oscillating lever being designed to be coupled to the one of the frames and equipped with two rollers which cooperate with the two tracks of a complementary cam driven in rotation by a common shaft.
  • the invention more particularly intends to remedy by proposing a leveling device which is particularly simple to construct and to use and which makes it possible to move with good precision the various roller levers of a cam armor mechanism.
  • the invention relates to a device for leveling the position of the frames of a weaving loom equipped with a camouflage weave mechanism, these frames being actuated by oscillating levers provided with follower rollers and mounted on a common shaft whose position relative to the mechanical frame is variable by means of at least one eccentric.
  • This device is characterized in that the angular orientation of the eccentric is controlled by means of a motorization assembly articulated on the frame around an axis generally parallel to the pivot axis of the eccentric, the shaft outlet of this motor assembly being integral in rotation with, or formed by, a threaded rod engaged in a captive nut of an eccentric operating arm.
  • the threaded rod driven in rotation by the motor directly attacks the captive nut of the operating arm, which has the effect of rotating this operating arm around the pivot axis of the eccentric, that is to say to control the positioning of the common shaft of the oscillating roller levers along its trajectory in an arc imposed by the eccentric.
  • a leveling device can incorporate one or more of the following characteristics: -
  • the nut is articulated relative to the operating arm, at least about an axis generally parallel to the pivot axis of the eccentric.
  • the operating arm is provided with a support surface against an end-of-travel stop when the eccentric is in a position compatible with the use of weave mechanics for weaving.
  • a member driven by the eccentric is able to come into abutment against an end of travel stop when the levers are in the leveling position. In this case, this member is advantageously secured to the operating arm.
  • the limit stop is equipped with means for detecting the support or arm or the aforementioned member in one of the above-mentioned positions.
  • the geometric axis of the shaft common to the levers, the geometric axis of the cam drive shaft and the geometric pivot axis of the eccentric are substantially parallel and co-planar.
  • This aspect of the invention contributes to good stability of the weave mechanics in the weaving configuration.
  • the shaft common to the lever is supported relative to the frame by means of two eccentrics each arranged in the vicinity of one of its ends.
  • the invention also relates to a camming armor mechanism for a weaving loom which comprises a leveling device as described above. Such a mechanism is more economical, more reliable and easier to implement, in particular for leveling the frames of the trade, than known materials.
  • the invention finally relates to a weaving loom equipped with a weaving mechanism as mentioned above.
  • FIG. 1 is a partial schematic representation of the principle of a weaving loom according to the invention
  • - Figure 2 is a schematic representation on a larger scale of the weave mechanics of the loom of Figure 1 in weaving configuration
  • - Figure 3 shows some parts of the mechanics of Figure 2 when these pass from a weaving configuration to a leveling configuration
  • - Figure 4 is a view similar to Figure 3, while the mechanics is in the leveling configuration
  • - Figure 5 is an enlarged view of detail V in Figure 2
  • - Figure 6 is an enlarged view of detail VI in Figure 4
  • Figure 7 is a perspective view of certain components of the mechanical leveling device shown in Figures 2 to 6.
  • the loom M shown in Figure 1 includes several heald frames, only one of which is shown in Figure 1 with the reference 1.
  • the different frames of the loom M are driven by a movement of vertical oscillations represented by the double arrow Fi and printed by a cam mechanism 10, the outlet levers 11 of which respectively attack connecting rods 12 associated with bent levers 13 connected to each other and to the frame 1 by connecting rods 1.
  • the levers 11 are provided in a number equivalent to the number of heddle frames 1 and pivotally mounted, as shown in the double arrow F 2 , around the longitudinal axis of a common shaft 15 supported by the frame 16 of the mechanism 10.
  • the shaft 15 is equipped, at its two ends, with two eccentrics 17 and 17 'which themselves support the shaft 15 and which are supported by two bearings, not shown, defined by the frame 16.
  • the mechanism 10 also includes several cams complementary 18 whose combined tracks 18A and 18B receive the rollers 19A and 19B in support from the same lever 11. Thus, each lever 11 follows a movement imposed by the geometry of the tracks 18A and 18B of the cam 18 with which it is associated .
  • a bevel gear 20 is mounted at the end of the shaft 21 common to the cams 18. For clarity of the drawing, the bevel gear 20 is shown only in the figures
  • a cover 16B shows on the frame 16 and represented by its silhouette in dashed lines only in FIGS. 1 and 2.
  • the axes X ⁇ 5 and X ⁇ 7 and X 2 ⁇ are co-planar, which means that the efforts spacer between shafts the 5 and 21 resulting from the action of the cams on the levers do not tend to rotate the eccentric 17 and its load control device.
  • the levers 11 should be brought into the configuration of FIG. 4 where the rollers 19A and 19B are spaced from the cams 18 and where the levers 11 all have the same angular position relative to to the X15 axis.
  • an electric motor 40 is mounted on a support 41 articulated around an axis X 42 defined by two bearings, only one of which is visible in FIG. 2 with the reference 42, these bearings being carried by a middle part 16A of the frame 16.
  • the axis X 42 is generally parallel to the axes X 15 , X ⁇ and X 2 ⁇ .
  • the assembly formed of the elements 40 and 41 can pivot around the axis X 42 as represented by the double arrow F 3 .
  • the output shaft 40A of the motor 40 is received in a sleeve 43 maintained by a bearing 44 in the support 41.
  • a key 45 makes it possible to associate in rotation the shaft 40A and the sleeve 43.
  • a threaded rod 46 is engaged in the sleeve 43 and secured thereto in rotation by means of a pin 47.
  • the threaded rod can be driven in rotation by the motor 40 in a direction which depends on the supply current of the motor 40
  • the output shaft of the motor 40 could protrude outside the support 41 and be threaded.
  • a nut 50 the thread of which is adapted to the thread of the rod 46, is mounted on this rod and held captive at the end of an operating arm 60 secured to the eccentric 17 and extending substantially in a radial direction relative to the axis X ⁇ 7 .
  • the arm 60 which makes it possible to exert a torque for rotating the eccentric 17 around the axis X i7 , comprises a main part 60A and a plate 60B attached to the part 60A.
  • the nut 50 is trapped between the elements 60A and 60B. It has two pins, only one of which is visible with the reference 61, which are engaged in the corresponding bores of the elements 60A and 60B, so that the nut 50 is articulated relative to the arm 60 around an axis X 6 ⁇ substantially parallel to the axes X 15 , X 17 , X 2 ⁇ and X ⁇ 3 .
  • the plate 60B is not shown in FIGS. 2 to 6 for the sake of clarity of the drawing.
  • the motor 40 is actuated so as to drive the threaded rod 46 in a direction of rotation R inducing a displacement of the nut 50 in the direction of the support 41, as represented by the arrow Fi.
  • This displacement has the effect of rotating the arm 60 and the eccentric 17 in the direction of the arrow F 5 , which has the effect of rotating, in the same direction, the geometric axis X 15 around the axis geometrical X ⁇ thus moving the shaft 15 away from the shaft 21 along a circular arc path C shown in phantom in Figure 3.
  • a stop 70 is mounted on the frame 16 and carries a contact switch 71 provided with a rod 72 against which abuts a surface 62 of the arm 60, as represented in FIG. 5. This makes it possible to detect that the eccentrics 17 and 17 ′ are indeed in an end-of-travel position where the rollers of the various levers 11 are in reduced clearance with the combined tracks of the associated cams 18.
  • the switch 71 is actuated, the power supply to the motor 40 is interrupted and weaving can take place.
  • the arm 60 is extended by an extension 63 diametrically opposite the end of the arm 60 on which the nut 50 pivots and which comes to bear against a surface 73 of the stop 70 in the configuration of FIG. 4.
  • a switch of the type of switch 71 can be provided on the stop 70 to detect the fact that the armor mechanics is in the leveling configuration.
  • the invention is not limited to the single embodiment described and can, in particular, be implemented with the devices shown in FIGS. 2 and 5 of EP-B-0 580 528.
  • the axis of articulation of the motor assembly can be located opposite the motor output shaft relative to this motor, that is to say, in the representation of the figures, at - above the engine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
  • Measurement Of Force In General (AREA)
  • Woven Fabrics (AREA)

Abstract

The invention relates to a weaving machine which is fitted with a cam harness mounting mechanism (10), wherein the frames are actuated by oscillating levers (11) provided with cam followers (19A) and mounted on a common shaft (15) whereby the position thereof can be varied in relation to the frame (16) with the aid of at least one eccentric (17). The angular orientation of said eccentric (17) is controlled with the aid of a motorization unit (40, 41) which is articulated (en 42) on the frame (16) about an axis (X42) which is globally parallel to the pivoting axis (X17) of the eccentric l (17), and the output shaft of the motorization unit (40, 41) is rotationally coupled to or formed by, a threaded rod (46) which is engaged in a plate nut (50) of a maneuvering arm (60) of the eccentric (17).

Description

DISPOSITIF DE NIVELAGE, MECANIQUE D'ARMURE A CAME INCORPORANT UN TEL DISPOSITIF ET METIER A TISSER EQUIPE D'UNE TELLE MECANIQUE LEVELING DEVICE, CAM WEAPON MECHANICAL INCORPORATING SUCH A DEVICE AND WEAVING EQUIPMENT EQUIPPED WITH SUCH A MECHANICAL
L' invention a trait à un dispositif de nivelage de la position des cadres d'un métier à tisser équipé d'une mécanique d'armure à cames. L'invention a également trait à une mécanique d' armure comprenant un tel dispositif ainsi qu'à un métier à tisser équipé d'une telle mécanique. Dans le domaine des métiers à tisser, on connaît des mécaniques d'armure à cames qui comprennent une série de leviers oscillants en nombre égal à celui des cadres de lisses à monter sur le métier, chaque levier oscillant étant prévu pour être attelé à l'un des cadres et équipé de deux galets qui coopèrent avec les deux pistes d'une came complémentaire entraînée en rotation par un arbre commun. Lors de certaines opérations de maintenance ou de réglage d'un métier à tisser, il est nécessaire d'amener tous les cadres du métier à un même niveau. Tel est en particulier le cas lorsqu'on doit procéder à la réparation de fils de chaîne cassés. Pour ce faire, il est connu de EP-A-0 580 528 de monter les différents leviers à galets sur un excentrique et de faire tourner cet excentrique pour amener les différents leviers dans une position commune dite de nivelage. Dans ce genre de dispositif, la rotation de l'excentrique est commandée par un moto-réducteur à pignon droit ou par un réducteur à roue et vis sans fin. Le rapport de réduction de ces matériels doit être élevé, ce qui induit l'utilisation de plusieurs étages réducteurs pour les réducteurs à pignon droit. Dans le cas d'un réducteur à roue et vis sans fin, un tel matériel est volumineux, complexe et de réglage délicat. Dans tous les cas, ces réducteur sont relativement coûteux. C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un dispositif de nivelage particulièrement simple à construire et à utiliser et permettant de déplacer avec une bonne précision les différents leviers à galets d'une mécanique d'armure à cames. Dans cet esprit, l'invention concerne un dispositif de nivelage de la position des cadres d'un métier à tisser équipé d'une mécanique d'armure à cames, ces cadres étant actionnés par des leviers oscillants pourvus de galets suiveurs et montés sur un arbre commun dont la position par rapport au bâti de la mécanique est variable au moyen d' au moins un excentrique. Ce dispositif est caractérisé en ce que l'orientation angulaire de l'excentrique est commandé au moyen d'un ensemble de motorisation articulé sur le bâti autour d'un axe globalement parallèle à l'axe de pivotement de l'excentrique, l'arbre de sortie de cet ensemble de motorisation étant solidaire en rotation avec, ou formé par, une tige filetée engagée dans un écrou prisonnier d'un bras de manœuvre de l'excentrique. Grâce à l'invention, la tige filetée entraînée en rotation par le moteur attaque directement l' écrou prisonnier du bras de manœuvre, ce qui a pour effet de faire tourner ce bras de manœuvre autour de l'axe de pivotement de l'excentrique, c'est—à-dire de contrôler le positionnement de l'arbre commun des leviers oscillants à galets le long de sa trajectoire en arc de cercle imposée par l'excentrique. Selon des aspects avantageux mais non obligatoires de l'invention, un dispositif de nivelage peut incorporer une ou plusieurs des caractéristiques suivantes : - L' écrou est articulé par rapport au bras de manœuvre, au moins autour d'un axe globalement parallèle à l'axe de pivotement de l'excentrique. - Le bras de manœuvre est pourvu d'une surface d' appui contre une butée de fin de course lorsque l'excentrique est dans une position compatible avec l'utilisation de la mécanique d'armure pour le tissage. - Un organe entraîné par l'excentrique est apte à venir en appui contre une butée de fin de course lorsque les leviers sont en position de nivelage. Dans ce cas, cet organe est avantageusement solidaire du bras de manœuvre. - La butée de fin de course est équipée de moyens de détection de l'appui ou bras ou de l'organe précité dans l'une des positions sus-mentionnées . - En configuration d'utilisation de la mécanique d'armure pour tissage, l'axe géométrique de l'arbre commun aux leviers, l'axe géométrique de l'arbre d'entraînement des cames et l'axe géométrique de pivotement de l'excentrique sont sensiblement parallèles et co-planaires . Cet aspect de l'invention concoure à une bonne stabilité de la mécanique d'armure en configuration de tissage. L'arbre commun au levier est supporté par rapport au bâti au moyen de deux excentriques disposés chacun au voisinage d'une de ses extrémités. L'invention concerne également une mécanique d'armure à cames pour métier à tisser qui comprend un dispositif de nivelage tel que décrit ci-dessus. Une telle mécanique est plus économique, plus fiable et plus aisée à mettre en œuvre, notamment pour le nivelage des cadres du métier, que les matériels connus. L' invention concerne enfin un métier à tisser équipé d'une mécanique d'armure telle que mentionnée ci-dessus. Un tel métier est plus facile à utiliser que ceux de l'état de la technique. L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un métier à tisser et d'une mécanique d'armure équipés d'un dispositif de nivelage conforme à l'invention, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels : - la figure 1 est une représentation schématique partielle de principe d'un métier à tisser conforme à 1' invention ; - la figure 2 est une représentation schématique à plus grande échelle de la mécanique d' armure du métier de la figure 1 en configuration de tissage ; - la figure 3 représente certaines parties de la mécanique de la figure 2 lorsque celles-ci passent d'une configuration de tissage à une configuration de nivelage ; - la figure 4 est une vue analogue à la figure 3, alors que la mécanique est en configuration de nivelage ; - la figure 5 est une vue à plus grande échelle du détail V à la figure 2 ; - la figure 6 est une vue à plus grande échelle de détail VI à la figure 4 et la figure 7 est une vue en perspective de certains éléments constitutifs du dispositif de nivelage de la mécanique représentée sur les figures 2 à 6. Le métier à tisser M représenté à la figure 1 comprend plusieurs cadres de lisses, dont un seul est représenté à la figure 1 avec la référence 1. Les différents cadres du métier M sont animés d'un mouvement d'oscillations verticales représenté par la double flèche Fi et imprimé par une mécanique à cames 10 dont les leviers de sortie 11 attaquent respectivement des bielles 12 associées à des leviers coudés 13 reliés entre eux et au cadre 1 par des bielles 1 . Les leviers 11 sont prévus en nombre équivalent au nombre de cadre de lisses 1 et montés pivotants, comme représenté sur la double flèche F2, autour de l'axe longitudinal d'un arbre commun 15 soutenu par le bâti 16 de la mécanique 10. L'arbre 15 est équipé, à ses deux extrémités, de deux excentriques 17 et 17' qui supportent eux-mêmes l'arbre 15 et qui sont supportés par deux paliers non représentés définis par le bâti 16. La mécanique 10 comprend également plusieurs cames complémentaires 18 dont les pistes conjuguées 18A et 18B reçoivent en appui les galets 19A et 19B d'un même levier 11. Ainsi, chaque levier 11 suit un mouvement imposé par la géométrie des pistes 18A et 18B de la came 18 à laquelle il est associé. Un couple conique 20 est monté à l'extrémité de l'arbre 21 commun aux cames 18. Pour la clarté du dessin, le couple conique 20 est représenté uniquement aux figuresThe invention relates to a device for leveling the position of the frames of a weaving loom equipped with a cam-armor mechanism. The invention also relates to an armor mechanism comprising such a device as well as to a loom equipped with such a mechanism. In the field of weaving looms, camshaft mechanics are known which include a series of oscillating levers in number equal to that of the heald frames to be mounted on the loom, each oscillating lever being designed to be coupled to the one of the frames and equipped with two rollers which cooperate with the two tracks of a complementary cam driven in rotation by a common shaft. During certain maintenance or adjustment operations of a loom, it is necessary to bring all the frames of the loom to the same level. This is particularly the case when repairing broken warp threads is required. To do this, it is known from EP-A-0 580 528 to mount the various roller levers on an eccentric and to rotate this eccentric to bring the various levers into a common so-called leveling position. In this type of device, the rotation of the eccentric is controlled by a gear motor with a straight pinion or by a wheel and worm gear reducer. The reduction ratio of these materials must be high, which induces the use of several reduction stages for spur gear reducers. In the case of a worm and wheel reducer, such material is voluminous, complex and delicate adjustment. In all cases, these reducers are relatively expensive. It is to these drawbacks that the invention more particularly intends to remedy by proposing a leveling device which is particularly simple to construct and to use and which makes it possible to move with good precision the various roller levers of a cam armor mechanism. . In this spirit, the invention relates to a device for leveling the position of the frames of a weaving loom equipped with a camouflage weave mechanism, these frames being actuated by oscillating levers provided with follower rollers and mounted on a common shaft whose position relative to the mechanical frame is variable by means of at least one eccentric. This device is characterized in that the angular orientation of the eccentric is controlled by means of a motorization assembly articulated on the frame around an axis generally parallel to the pivot axis of the eccentric, the shaft outlet of this motor assembly being integral in rotation with, or formed by, a threaded rod engaged in a captive nut of an eccentric operating arm. Thanks to the invention, the threaded rod driven in rotation by the motor directly attacks the captive nut of the operating arm, which has the effect of rotating this operating arm around the pivot axis of the eccentric, that is to say to control the positioning of the common shaft of the oscillating roller levers along its trajectory in an arc imposed by the eccentric. According to advantageous but not compulsory aspects of the invention, a leveling device can incorporate one or more of the following characteristics: - The nut is articulated relative to the operating arm, at least about an axis generally parallel to the pivot axis of the eccentric. - The operating arm is provided with a support surface against an end-of-travel stop when the eccentric is in a position compatible with the use of weave mechanics for weaving. - A member driven by the eccentric is able to come into abutment against an end of travel stop when the levers are in the leveling position. In this case, this member is advantageously secured to the operating arm. - The limit stop is equipped with means for detecting the support or arm or the aforementioned member in one of the above-mentioned positions. - In the configuration of use of the weaving mechanics for weaving, the geometric axis of the shaft common to the levers, the geometric axis of the cam drive shaft and the geometric pivot axis of the eccentric are substantially parallel and co-planar. This aspect of the invention contributes to good stability of the weave mechanics in the weaving configuration. The shaft common to the lever is supported relative to the frame by means of two eccentrics each arranged in the vicinity of one of its ends. The invention also relates to a camming armor mechanism for a weaving loom which comprises a leveling device as described above. Such a mechanism is more economical, more reliable and easier to implement, in particular for leveling the frames of the trade, than known materials. The invention finally relates to a weaving loom equipped with a weaving mechanism as mentioned above. Such a loom is easier to use than those of the prior art. The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of a weaving loom and an armor mechanic equipped with a leveling device in accordance with the invention, given solely by way of example and made with reference to the accompanying drawings in which: - Figure 1 is a partial schematic representation of the principle of a weaving loom according to the invention; - Figure 2 is a schematic representation on a larger scale of the weave mechanics of the loom of Figure 1 in weaving configuration; - Figure 3 shows some parts of the mechanics of Figure 2 when these pass from a weaving configuration to a leveling configuration; - Figure 4 is a view similar to Figure 3, while the mechanics is in the leveling configuration; - Figure 5 is an enlarged view of detail V in Figure 2; - Figure 6 is an enlarged view of detail VI in Figure 4 and Figure 7 is a perspective view of certain components of the mechanical leveling device shown in Figures 2 to 6. The loom M shown in Figure 1 includes several heald frames, only one of which is shown in Figure 1 with the reference 1. The different frames of the loom M are driven by a movement of vertical oscillations represented by the double arrow Fi and printed by a cam mechanism 10, the outlet levers 11 of which respectively attack connecting rods 12 associated with bent levers 13 connected to each other and to the frame 1 by connecting rods 1. The levers 11 are provided in a number equivalent to the number of heddle frames 1 and pivotally mounted, as shown in the double arrow F 2 , around the longitudinal axis of a common shaft 15 supported by the frame 16 of the mechanism 10. The shaft 15 is equipped, at its two ends, with two eccentrics 17 and 17 'which themselves support the shaft 15 and which are supported by two bearings, not shown, defined by the frame 16. The mechanism 10 also includes several cams complementary 18 whose combined tracks 18A and 18B receive the rollers 19A and 19B in support from the same lever 11. Thus, each lever 11 follows a movement imposed by the geometry of the tracks 18A and 18B of the cam 18 with which it is associated . A bevel gear 20 is mounted at the end of the shaft 21 common to the cams 18. For clarity of the drawing, the bevel gear 20 is shown only in the figures
1 et 2. Un capot 16B montre sur le bâti 16 et représenté par sa silhouette en traits mixtes uniquement aux figures 1 et1 and 2. A cover 16B shows on the frame 16 and represented by its silhouette in dashed lines only in FIGS. 1 and
2 permet d'isoler les éléments 15 à 21 de l'extérieur. A la figure 2, la trace de l'arbre 15 est représentée en traits mixtes et l'on note Xι5 son axe géométrique. De la même manière, on note Xι l'axe géométrique de pivotement des excentriques 17 et 17' et X2ι l'axe géométrique de l'arbre 21. Ces axes sont globalement parallèles entre eux. Dans la configuration de tissage représentée à la figure 2, dans laquelle les leviers oscillants 11 sont prévus pour entraîner les cadres de lisse 1 et équivalents, les axes Xι5 et Xχ7 et X2ι sont co-planaires, ce qui induit que les efforts d' écartement entre les arbres l'5 et 21 résultant de l'action des cames sur les leviers ne tendent pas à faire tourner l'excentrique 17 et à charger son dispositif de commande. Lorsqu'on souhaite procéder au nivelage des cadres 1, il convient d' amener les leviers 11 dans la configuration de la figure 4 où les galets 19A et 19B sont écartés des cames 18 et où les leviers 11 ont tous la même position angulaire par rapport à l'axe X15. Pour ce faire, un moteur électrique 40 est monté sur un support 41 articulé autour d'un axe X42 défini par deux paliers, dont un seul est visible à la figure 2 avec la référence 42, ces paliers étant portés par une partie médiane 16A du bâti 16. L'axe X42 est globalement parallèle aux axes X15, Xχ et X2χ . Ainsi, l'ensemble formé des éléments 40 et 41 peut pivoter autour de l'axe X42 comme représenté par la double flèche F3. L'arbre de sortie 40A du moteur 40 est reçu dans un manchon 43 maintenu grâce à un palier 44 dans le support 41. Une clavette 45 permet d'associer en rotation l'arbre 40A et le manchon 43. Par ailleurs, une tige filetée 46 est engagée dans le manchon 43 et solidarisée à celui-ci en rotation grâce à une goupille 47. Ainsi, la tige filetée peut-elle être entraînée en rotation par le moteur 40 dans un sens qui dépend du courant d'alimentation du moteur 40. En variante, l'arbre de sortie du moteur 40 pourrait faire saillie à l'extérieur du support 41 et être fileté. Un écrou 50, dont le taraudage est adapté au filetage de la tige 46, est monté sur cette tige et retenu prisonnier à l'extrémité d'un bras de manœuvre 60 solidaire de l'excentrique 17 et s' étendant sensiblement selon une direction radiale par rapport à l'axe Xι7. Le bras 60, qui permet d'exercer un couple de mise en rotation de l'excentrique 17 autour de l'axe Xi7, comprend une partie principale 60A et une plaque 60B rapportée sur la partie 60A. L' écrou 50 est pris en chappe entre les éléments 60A et 60B. Il est pourvu de deux tourillons, dont un seul est visible avec la référence 61, qui sont engagés dans les alésages correspondants des éléments 60A et 60B, de telle sorte que l' écrou 50 est articulé par rapport au bras 60 autour d'un axe X6ι sensiblement parallèle aux axes X15, X17, X2ι et X<3 . Il est à noter que la plaque 60B n'est pas représentée sur les figures 2 à 6 pour la clarté du dessin. Lorsqu'il convient de déplacer les différents leviers oscillants 11 vers leur position de nivelage, le moteur 40 est actionné de façon à entraîner la tige filetée 46 dans un sens de rotation R induisant un déplacement de l' écrou 50 en direction du support 41, comme représenté par la flèche Fi . Ce déplacement a pour effet de faire tourner le bras 60 et l'excentrique 17 dans le sens de la flèche F5, ce qui a pour effet de faire tourner, dans le même sens, l'axe géométrique X15 autour de l'axe géométrique Xπ en éloignant ainsi l'arbre 15 de l'arbre 21 selon une trajectoire en arc de cercle C représentée en traits mixtes à la figure 3. En passant par la position intermédiaire de la figure 3, on peut ainsi atteindre la position de la figure 4 où tous les galets 19a et 19b des leviers 11 sont dégagés des cames 18, les leviers étant alignés, de telle sorte que les cadres 1 sont également alignés. Le fait que l'ensemble formé du moteur 40 et du support 41 est monté oscillant autour de l'axe X42 permet d'atteindre les différentes orientations nécessaires de la tige filetée 46 au cours du mouvement de remontée de 1' écrou 40 le long de cette tige et en direction du support 41, ces différentes orientations provenant de la variation de la distance horizontale d entre l'axe central X46 de la tige 46 et l'axe Xχ . Une butée 70 est montée sur le bâti 16 et porte un interrupteur à contact 71 muni d'une tige 72 contre laquelle vient en appui une surface 62 du bras 60, comme représenté à la figure 5. Ceci permet de détecter que les excentriques 17 et 17' sont bien dans une position de fin de course où les galets des différents leviers 11 se trouvent à jeu réduit avec les pistes conjuguées des cames 18 associées. Lorsque l'interrupteur 71 est actionné, l'alimentation du moteur 40 est interrompue et le tissage peut avoir lieu. En outre, le bras 60 se prolonge par une extension 63 diamétralement opposée à l'extrémité du bras 60 sur laquelle tourillonne l' écrou 50 et qui vient en appui contre une surface 73 de la butée 70 dans la configuration de la figure 4. Selon une variante non représentée de l'invention, un interrupteur du type de l'interrupteur 71 peut être prévu sur la butée 70 pour détecter le fait que la mécanique d'armure est en configuration de nivelage. L' invention n' est pas limitée au seul mode de réalisation décrit et peut, en particulier, être mise en œuvre avec les dispositifs représentés aux figures 2 et 5 de EP-B-0 580 528. Selon une variante non représentée de l'invention, l'axe d'articulation de l'ensemble de motorisation peut être situé à l'opposé de l'arbre de sortie du moteur par rapport à ce moteur, c'est-à-dire, dans la représentation des figures, au-dessus du moteur. 2 isolates the elements 15 to 21 from the outside. In Figure 2, the trace of the shaft 15 is shown in phantom and we denote Xι 5 its geometric axis. In the same way, Xι denotes the geometric axis of pivoting of the eccentrics 17 and 17 ′ and X 2 ι the geometric axis of the shaft 21. These axes are generally parallel to one another. In the weaving configuration shown in FIG. 2, in which the oscillating levers 11 are provided to drive the heald frames 1 and the like, the axes Xι 5 and Xχ 7 and X 2 ι are co-planar, which means that the efforts spacer between shafts the 5 and 21 resulting from the action of the cams on the levers do not tend to rotate the eccentric 17 and its load control device. When it is desired to level the frames 1, the levers 11 should be brought into the configuration of FIG. 4 where the rollers 19A and 19B are spaced from the cams 18 and where the levers 11 all have the same angular position relative to to the X15 axis. To do this, an electric motor 40 is mounted on a support 41 articulated around an axis X 42 defined by two bearings, only one of which is visible in FIG. 2 with the reference 42, these bearings being carried by a middle part 16A of the frame 16. The axis X 42 is generally parallel to the axes X 15 , Xχ and X 2 χ. Thus, the assembly formed of the elements 40 and 41 can pivot around the axis X 42 as represented by the double arrow F 3 . The output shaft 40A of the motor 40 is received in a sleeve 43 maintained by a bearing 44 in the support 41. A key 45 makes it possible to associate in rotation the shaft 40A and the sleeve 43. Furthermore, a threaded rod 46 is engaged in the sleeve 43 and secured thereto in rotation by means of a pin 47. Thus, the threaded rod can be driven in rotation by the motor 40 in a direction which depends on the supply current of the motor 40 As a variant, the output shaft of the motor 40 could protrude outside the support 41 and be threaded. A nut 50, the thread of which is adapted to the thread of the rod 46, is mounted on this rod and held captive at the end of an operating arm 60 secured to the eccentric 17 and extending substantially in a radial direction relative to the axis Xι 7 . The arm 60, which makes it possible to exert a torque for rotating the eccentric 17 around the axis X i7 , comprises a main part 60A and a plate 60B attached to the part 60A. The nut 50 is trapped between the elements 60A and 60B. It has two pins, only one of which is visible with the reference 61, which are engaged in the corresponding bores of the elements 60A and 60B, so that the nut 50 is articulated relative to the arm 60 around an axis X 6 ι substantially parallel to the axes X 15 , X 17 , X 2 ι and X < 3 . It should be noted that the plate 60B is not shown in FIGS. 2 to 6 for the sake of clarity of the drawing. When the various oscillating levers 11 have to be moved towards their leveling position, the motor 40 is actuated so as to drive the threaded rod 46 in a direction of rotation R inducing a displacement of the nut 50 in the direction of the support 41, as represented by the arrow Fi. This displacement has the effect of rotating the arm 60 and the eccentric 17 in the direction of the arrow F 5 , which has the effect of rotating, in the same direction, the geometric axis X 15 around the axis geometrical Xπ thus moving the shaft 15 away from the shaft 21 along a circular arc path C shown in phantom in Figure 3. By passing through the intermediate position of Figure 3, we can thus reach the position of the Figure 4 where all the rollers 19a and 19b of the levers 11 are released from the cams 18, the levers being aligned, so that the frames 1 are also aligned. The fact that the assembly formed by the motor 40 and the support 41 is mounted oscillating around the axis X 42 makes it possible to reach the different necessary orientations of the threaded rod 46 during the movement of raising the nut 40 along of this rod and in the direction of the support 41, these different orientations coming from the variation of the horizontal distance d between the central axis X 46 of the rod 46 and the axis Xχ. A stop 70 is mounted on the frame 16 and carries a contact switch 71 provided with a rod 72 against which abuts a surface 62 of the arm 60, as represented in FIG. 5. This makes it possible to detect that the eccentrics 17 and 17 ′ are indeed in an end-of-travel position where the rollers of the various levers 11 are in reduced clearance with the combined tracks of the associated cams 18. When the switch 71 is actuated, the power supply to the motor 40 is interrupted and weaving can take place. In addition, the arm 60 is extended by an extension 63 diametrically opposite the end of the arm 60 on which the nut 50 pivots and which comes to bear against a surface 73 of the stop 70 in the configuration of FIG. 4. According to a variant not shown of the invention, a switch of the type of switch 71 can be provided on the stop 70 to detect the fact that the armor mechanics is in the leveling configuration. The invention is not limited to the single embodiment described and can, in particular, be implemented with the devices shown in FIGS. 2 and 5 of EP-B-0 580 528. According to a variant not shown of the invention, the axis of articulation of the motor assembly can be located opposite the motor output shaft relative to this motor, that is to say, in the representation of the figures, at - above the engine.

Claims

REVENDICATIONS
1. Dispositif de nivelage de la position des cadres d'un métier à tisser équipé d'une mécanique d'armure à cames, lesdits cadres étant actionnés par des leviers oscillants pourvus de galets suiveurs et montés sur un arbre commun dont la position par rapport au bâti de la mécanique est variable au moyen d'au moins un excentrique, caractérisé en ce que l'orientation angulaire dudit excentrique (17, 17') est commandée au moyen d'un ensemble de motorisation (40, 41) articulé (en 42) sur ledit bâti autour d'un axe (X2) globalement parallèle à l'axe (Xι7) de pivotement dudit excentrique, l'arbre de sortie (40A) dudit ensemble de motorisation étant solidaire en rotation avec, ou formé par, une tige filetée (46) engagée dans un écrou (50) prisonnier d'un bras (60) de manœuvre dudit excentrique (17) . 1. Device for leveling the position of the frames of a weaving loom equipped with a camouflage weaving mechanism, said frames being actuated by oscillating levers provided with follower rollers and mounted on a common shaft whose position relative to to the mechanical frame is variable by means of at least one eccentric, characterized in that the angular orientation of said eccentric (17, 17 ') is controlled by means of an articulated motorization assembly (40, 41) (in 42) on said frame around an axis (X 2 ) generally parallel to the axis (Xι 7 ) of pivoting of said eccentric, the output shaft (40A) of said motorization assembly being integral in rotation with, or formed by , a threaded rod (46) engaged in a nut (50) trapped in an arm (60) for operating said eccentric (17).
2. Dispositif selon la revendication 1, caractérisé en ce que ledit écrou (50) est articulé par rapport audit bras de manœuvre (60) au moins autour d'un axe (Xεi) globalement parallèle audit axe de pivotement (Xι ) dudit excentrique (17, 17'). 2. Device according to claim 1, characterized in that said nut (50) is articulated relative to said operating arm (60) at least about an axis (Xεi) generally parallel to said pivot axis (Xι) of said eccentric ( 17, 17 ').
3. Dispositif selon l'une des revendications précédentes, caractérisé en ce que ledit bras de manœuvre3. Device according to one of the preceding claims, characterized in that said operating arm
(60) est pourvu d'une surface (62) d'appui contre une butée de fin de course (70) lorsque ledit excentrique (17, 17') est dans une position (figures 2, 5) compatible avec l'utilisation de la mécanique d'armure (10) pour le tissage. (60) is provided with a surface (62) bearing against a limit stop (70) when said eccentric (17, 17 ') is in a position (FIGS. 2, 5) compatible with the use of weave mechanics (10) for weaving.
4. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comprend un organe4. Device according to one of the preceding claims, characterized in that it comprises a member
(63) entraîné par ledit excentrique (17) et apte à venir en appui contre une butée de fin de course (73) lorsque lesdits leviers (11) sont en position de nivelage (figures 4 et 6) . (63) driven by said eccentric (17) and able to come into abutment against an end of travel stop (73) when said levers (11) are in the leveling position (Figures 4 and 6).
5. Dispositif selon la revendication 4, caractérisé en ce que ledit organe (63) est solidaire dudit bras de manœuvre ( 60) . 5. Device according to claim 4, characterized in that said member (63) is integral with said operating arm (60).
6. Dispositif selon l'une des revendications 3 à 5, caractérisé en ce que ladite butée (70, 73) est équipée de moyens (71) de détection de l'appui dudit bras (60) ou dudit organe (63) dans ladite position. 6. Device according to one of claims 3 to 5, characterized in that said stop (70, 73) is equipped with means (71) for detecting the support of said arm (60) or of said member (63) in said position.
7. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'en configuration d'utilisation de la mécanique d'armure pour tissage (figures 2, 5), l'axe géométrique (XA de l'arbre (15) commun auxdits leviers (11), l'axe géométrique (X2ι) de l'arbre d'entraînement (21) desdites cames (20) et l'axe géométrique (Xι ) de pivotement dudit excentrique (17, 17') sont sensiblement parallèles et co-planaires . 7. Device according to one of the preceding claims, characterized in that in the configuration of use of the weaving mechanics for weaving (FIGS. 2, 5), the geometric axis (XA of the common shaft (15) to said levers (11), the geometric axis (X 2 ι) of the drive shaft (21) of said cams (20) and the geometric axis (Xι) of pivoting of said eccentric (17, 17 ') are substantially parallel and co-planar.
8. Dispositif selon l'une des revendications précédentes, caractérisé en ce que ledit arbre (15) commun auxdits leviers (11) est supporté par rapport audit bâti (16) au moyen de deux excentriques (17, 17') disposés chacun au voisinage d'une de ses extrémités. 8. Device according to one of the preceding claims, characterized in that said shaft (15) common to said levers (11) is supported relative to said frame (16) by means of two eccentrics (17, 17 ') each arranged in the vicinity from one of its ends.
9. Mécanique d'armure à cames (10) pour métier à tisser, caractérisée en ce qu'elle comprend un dispositif de nivelage (40-72) selon l'une des revendications précédentes . 9. Camouflage weave mechanism (10) for a loom, characterized in that it comprises a leveling device (40-72) according to one of the preceding claims.
10. Métier à tisser (M) équipé d'une mécanique (10) d'armure selon la revendication 9. 10. Weaving machine (M) equipped with a mechanical (10) weave according to claim 9.
EP05744362A 2004-03-29 2005-03-25 Level adjustment device, cam harness mounting mechanism incorporating said device and weaving machine fitted with said mechanism Active EP1743058B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0403218A FR2868090B1 (en) 2004-03-29 2004-03-29 DEVICE FOR LEVELING, MECHANICAL ARMOR WITH CAME INCORPORATING SUCH A DEVICE AND WEAVING FABRIC OF SUCH A MECHANICAL
PCT/FR2005/000725 WO2005098107A1 (en) 2004-03-29 2005-03-25 Level adjustment device, cam harness mounting mechanism incorporating said device and weaving machine fitted with said mechanism

Publications (2)

Publication Number Publication Date
EP1743058A1 true EP1743058A1 (en) 2007-01-17
EP1743058B1 EP1743058B1 (en) 2011-03-02

Family

ID=34944509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05744362A Active EP1743058B1 (en) 2004-03-29 2005-03-25 Level adjustment device, cam harness mounting mechanism incorporating said device and weaving machine fitted with said mechanism

Country Status (8)

Country Link
EP (1) EP1743058B1 (en)
JP (1) JP2007530815A (en)
KR (1) KR101245226B1 (en)
CN (1) CN1938462B (en)
AT (1) ATE500363T1 (en)
DE (1) DE602005026645D1 (en)
FR (1) FR2868090B1 (en)
WO (1) WO2005098107A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2113592B1 (en) 2008-04-30 2013-05-08 Groz-Beckert KG Excenter with levelling device
FR3043097B1 (en) 2015-10-29 2017-12-22 Staubli Sa Ets ARMOR MECHANICAL COMPRISING A LEVELING DEVICE AND WEAVING COMPRISING AN ARMOR MECHANICAL MECHANICAL
FR3043098B1 (en) 2015-10-29 2017-12-22 Staubli Sa Ets CROWN FORMING MACHINE AND WOVEN WEAR COMPRISING SUCH MOBILE FORMING MACHINE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS594775U (en) * 1982-06-30 1984-01-12 株式会社山田ドビ− Leveling device in tapepet opening device
JPH0721584Y2 (en) * 1990-03-19 1995-05-17 株式会社豊田自動織機製作所 Loom heald frame leveling device
JPH086055Y2 (en) * 1992-07-08 1996-02-21 株式会社山田ドビー Active cam leveling device
JP3320841B2 (en) * 1992-07-10 2002-09-03 シュトイブリー・ファベルゲ Cam mechanism used for loom
JP3855482B2 (en) * 1998-08-17 2006-12-13 株式会社豊田自動織機 Opening device in loom

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005098107A1 *

Also Published As

Publication number Publication date
CN1938462A (en) 2007-03-28
JP2007530815A (en) 2007-11-01
EP1743058B1 (en) 2011-03-02
CN1938462B (en) 2010-09-08
KR101245226B1 (en) 2013-03-25
FR2868090B1 (en) 2006-05-26
KR20060132961A (en) 2006-12-22
FR2868090A1 (en) 2005-09-30
WO2005098107A1 (en) 2005-10-20
DE602005026645D1 (en) 2011-04-14
ATE500363T1 (en) 2011-03-15

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