EP1550751A1 - Method of controlling the feeding tension of at least one weft yarn, weft yarn feeding device and loom with such a weft yarn feeding device - Google Patents

Method of controlling the feeding tension of at least one weft yarn, weft yarn feeding device and loom with such a weft yarn feeding device Download PDF

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Publication number
EP1550751A1
EP1550751A1 EP04356206A EP04356206A EP1550751A1 EP 1550751 A1 EP1550751 A1 EP 1550751A1 EP 04356206 A EP04356206 A EP 04356206A EP 04356206 A EP04356206 A EP 04356206A EP 1550751 A1 EP1550751 A1 EP 1550751A1
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EP
European Patent Office
Prior art keywords
actuator
weft
drum
weft yarn
yarn
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Granted
Application number
EP04356206A
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German (de)
French (fr)
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EP1550751B1 (en
Inventor
Patrice Przytarski
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Staeubli Lyon SA
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Staeubli Lyon SA
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Publication of EP1550751A1 publication Critical patent/EP1550751A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/02—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein loops of continuous weft thread are inserted, i.e. double picks
    • D03D47/06—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein loops of continuous weft thread are inserted, i.e. double picks by a pivoted needle having a permanently-threaded eye
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/388—Regulating forwarding speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method for controlling the supply voltage and to a power device of at least one weft thread for a loom sickle.
  • the invention also relates to a profession weave equipped with such a feeding device.
  • the rotational speed of the donor must be synchronized with that of the sickle, which implies the use of complex mechanical devices, in particular of the type reducers and / or springs of compensation.
  • the known devices are therefore relatively expensive and their adjustment can be particularly long and tedious.
  • EP-A-0 851 833 or from EP-A-0 619 261 to control a brake of a frame donor in function of the downstream weft thread tension. It is also known from EP-A-0 467 059 to enslave the position a lever forming a voltage regulator. These devices are not effective enough to be associated with a trade to sickle.
  • the invention relates to a method of controlling the supply voltage of at least one wire weft, in a loom having at least one sickle from a supply of yarn, process in which at least over is subject to the action of a donor raster and a compensation device of its accelerations / decelerations, this device comprising a movable member defining the trajectory of the wire of frame.
  • This method is characterized in that it comprises a step of controlling the operation of a electric actuator for driving at least one drum of the frame donor according to a representative signal of the operation of a second electric actuator which drive itself the aforementioned movable member.
  • the frame donor can, by the angular position of its drum, not only provide the just enough thread needed for weaving but also smooth some of the accelerations / decelerations of the frame, which makes it possible to limit in the necessary compensation.
  • compensating device or "compensator” of the invention makes it possible not only to smooth some of the violent acceleration / deceleration of the frame, but also to a certain extent to fix the tension of the weft yarn regardless of its angular position. he also allows you to adjust the speed of the according to the frame requirement, allowing variable unwinding speeds.
  • the invention also relates to a device weft feed of a loom with at least one sickle that allows to put in a process as previously described and, more specifically, a device comprising a reserve of weft threads, at least one thread drive drum frame and at least one compensation device for its accelerations / decelerations of this thread which comprises a movable member defining the trajectory of the weft yarn.
  • This device is characterized in that the drum is driven in rotation by a first electric actuator, in that the movable member is driven by a second electric actuator and in that means are provided to measure the position of the aforementioned movable member, then that means are also provided to control the first electric actuator according to the result of the measurement carried out by the measuring means.
  • the position of the drum training which belongs in practice to the frame donor, can be ordered in a way to constantly adapt to the movements of back and forth sickle and compensate for some of the violent accelerations and decelerations of the weft thread resulting from it.
  • the invention finally relates to a loom for sickle equipped with a feeding device such as described above.
  • a feeding device such as described above.
  • the device represented in FIGS. 1 and 2 is intended to allow the weft feed of a sickle 1 animated with an oscillating pivoting movement, represented by the arrow F 2 , around a fixed point 2.
  • the weft thread 3 is moved relative to the warp threads 4 of the loom M, which makes it possible to weave a ribbon R which moves in the direction of the arrow F 3 .
  • the sickle 1 is supplied with weft thread 3 from a spool 10. Starting from the spool 10, the thread 3 passes through a fixed guide eyelet 11 and a thread brake 12 known per se which ensures the tension of the thread 3 by applying on it a constant pressure P 1 , this pressure being adjustable, as represented by the arrow F 4 .
  • the wire 3 After passing through the wire brake 12, the wire 3 runs along a return roller 14 and then comes to wind on a drum 16 belonging to a frame donor 16 whose function is to deliver to the sickle 1 a quantity of son 3 corresponding to the movements of back and forth of his free end 5.
  • the wire 3 can be in support about 180 ° on the drum 15 or do one or more rounds around this one.
  • the frame donor 16 also includes a actuator 17, for example a brushless motor, controlled by a suitable electronic unit 18.
  • the wire 3 Downstream of the drum 15, the wire 3 bears on a second roller 19 and then passes through an eyelet 20 mounted at the free end of an arm 21 movable between the two positions shown in phantom in FIG. 1, which allows to the eyelet 20 to describe a trajectory globally in an arc C 1 .
  • the position of the arm 21 is controlled by a second servomotor 22, for example a brushless motor which is powered to generate a substantially constant.
  • the thread 3 passes through a second fixed eyelet 23 then through a eyelet 6 formed at the level of the free end 5 of the sickle 1.
  • the torque C 2 exerted by the motor 22 on the arm 21 directly influences the tension T of the weft thread 3 between the eyelets 23 and 6.
  • the motor 22 is supplied so that, in taking into account the trajectory of wire 3 between the elements 19, 20 and 23, the voltage T is substantially constant, the value of this constant that can be set by the adjusting the motor power supply 22.
  • a sensor 25 is installed near the actuator 22 for detecting the angular position of its rotor ⁇ 22a.
  • the sensor 25 is connected to the unit 18 and its electrical output signal S 1 is supplied to this unit to control the servomotor 17 and thereby the drum 15, so as to deliver a quantity of weft yarn 3 which reduces Permanently the arm 21 in the desired position.
  • the drum 15 delivers the amount of weft yarn 3 just needed for the movements of the end 5 of the sickle 1.
  • the assembly formed of elements 20 to 21 constitutes a compensating device or "compensator” 27 that smooth some of the violent acceleration / deceleration to which the weft thread 3 is subjected because of movements of the sickle 1.
  • the donor 16 provides the right amount of yarn required for weaving and participates in the smoothing of the violent accelerations / decelerations of the weft yarn, since the signal S 1 makes it possible to adjust the advance of the weft thread as a function of the position of the arm 21.
  • the compensator 27 makes it possible to give a tension T substantially constant and of desired value to the weft thread in the vicinity of the sickle, this relatively independently of the position of the sickle during its movement F 2 .
  • the invention makes it possible to each moment, the speed of the donor 16 according to the need in weft yarn, so the amount of yarn provided by the donor 16 is always in line with the need for weft yarn which has, moreover, a tension T substantially constant.
  • a single servomotor 17 may be used to drive, around a same axis A-A ', several drums 15 1 to 15 n which are in number corresponding to the number of sickles 1 1 to 1 n .
  • a single servomotor 22 is, moreover, used to drive, simultaneously and around another axis B-B ', n arm 21 1 to 21 n in the eyelets 20 1 to 20 n which pass the weft son 3 1 to 3 n .
  • the torque C 2 exerted by the servomotor 22 is adjusted to take into account the number of arms 21 1 to 21 n to drive.
  • an electrical signal S 1 is used by a control unit 18 to drive the motor 17 as a function of the angular position of the motor 22 detected by a sensor 25.
  • the invention can also be implemented when each sickle is fed with several weft threads.
  • the Servomotors 17 and 22 are structurally identical.
  • the motor 22 can be replaced by a linear motor within compensator 27.

Abstract

The monitoring procedure, for use on a loom on which the weft yarn is delivered by a feed drum (15) with an acceleration/deceleration compensator (27), includes a stage in which a first electrical actuator (17) of the drum is controlled by a signal representing the functioning of a second electrical actuator (22) driving the mobile member (20, 21) of the compensator. The second actuator is in the form of an electric servomotor controlled to give a constant torque, and the angular position of the drum is controlled so that the yarn tension after the yarn feeder (16) and compensator meet a predetermined value.

Description

L'invention a trait à un procédé de contrôle de la tension d'alimentation et à un dispositif d'alimentation d'au moins un fil de trame pour un métier à tisser à faucille. L'invention a également trait à un métier à tisser équipé d'un tel dispositif d'alimentation.The invention relates to a method for controlling the supply voltage and to a power device of at least one weft thread for a loom sickle. The invention also relates to a profession weave equipped with such a feeding device.

Dans le domaine des métiers à tisser utilisés pour la fabrication d'articles relativement étroits, tels que des rubans et/ou étiquettes, il est connu d'utiliser un organe d'entraínement d'un fil de trame qui est animé d'un mouvement d'oscillations en pivotement et qui est le plus souvent dénommé faucille. La faucille doit être alimentée en fil de trame à partir d'une bobine. Compte tenu du mouvement d'oscillations ou de va-et-vient de la faucille, la tension du fil de trame entre la bobine et la faucille doit être contrôlée et il est connu d'utiliser pour ce faire un dispositif mécanique à cabestan, dénommé « donneur », éventuellement associé à un système mécanique de compensation de tension, dénommé « compensateur ». Pour obtenir une tension adéquate du fil de trame en amont de la faucille, la vitesse de rotation du donneur doit être synchronisée avec celle de la faucille, ce qui implique l'utilisation de dispositifs mécaniques complexes, notamment de type réducteurs et/ou ressorts de compensation. Les dispositifs connus sont donc relativement onéreux et leur réglage peut s'avérer particulièrement long et fastidieux.In the field of looms used for relatively narrow articles, such as ribbons and / or labels, it is known to use an organ of training a weft yarn which is animated by a oscillating motion in pivoting and which is the most often referred to as sickle. The sickle must be fed in weft yarn from a reel. Given the movement of oscillations or back and forth of the sickle, the tension of the weft thread between the spool and the sickle must be controlled and it is known to use for this to make a mechanical device with capstan, called "Donor", possibly associated with a mechanical system voltage compensation, called "compensator". For obtain adequate tension of the weft yarn upstream of the sickle, the rotational speed of the donor must be synchronized with that of the sickle, which implies the use of complex mechanical devices, in particular of the type reducers and / or springs of compensation. The known devices are therefore relatively expensive and their adjustment can be particularly long and tedious.

Il est connu, par exemple de EP-A-0 851 833 ou de EP-A-0 619 261 de commander un frein d'un donneur de trame en fonction de la tension du fil de trame en aval. Il est également connu de EP-A-0 467 059 d'asservir la position d'un levier formant régulateur de tension. Ces dispositifs ne sont pas assez efficaces pour être associés à un métier à faucille. It is known, for example from EP-A-0 851 833 or from EP-A-0 619 261 to control a brake of a frame donor in function of the downstream weft thread tension. It is also known from EP-A-0 467 059 to enslave the position a lever forming a voltage regulator. These devices are not effective enough to be associated with a trade to sickle.

Il est également connu de FR-A-2 352 906 d'équiper un métier à lance d'un cylindre entraíneur de trame actionné électriquement en fonction de la position d'un bras compensateur. Un tel mécanisme n'est pas assez réactif pour être associé à un métier à faucille.It is also known from FR-A-2 352 906 to equip a lance loom of a driven weft actuator cylinder electrically depending on the position of an arm compensator. Such a mechanism is not responsive enough for be associated with a sickle loom.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un nouveau procédé de contrôle de la tension d'alimentation d'un fil de trame dans lequel il n'est pas nécessaire de synchroniser mécaniquement le donneur de trame et la faucille, alors que le fil de trame est délivré avec une tension adaptée à son utilisation.It is to these disadvantages that more particularly remedy the invention by proposing a new method of controlling the supply voltage a weft yarn in which it is not necessary to mechanically synchronize the frame donor and the sickle, while the weft yarn is delivered with a voltage adapted to its use.

Dans cet esprit, l'invention concerne un procédé de contrôle de la tension d'alimentation d'au moins un fil de trame, dans un métier à tisser comportant au moins une faucille à partir d'une réserve de fils, procédé dans lequel au moins au fil est soumis à l'action d'un donneur de trame à tambour et d'un dispositif de compensation de ses accélérations/décélérations, ce dispositif comprenant un organe mobile définissant la trajectoire du fil de trame. Ce procédé est caractérisé en ce qu'il comprend une étape consistant à commander le fonctionnement d'un actionneur électrique d'entraínement d'au moins un tambour du donneur de trame en fonction d'un signal représentatif du fonctionnement d'un second actionneur électrique qui entraíne lui même l'organe mobile précité.In this spirit, the invention relates to a method of controlling the supply voltage of at least one wire weft, in a loom having at least one sickle from a supply of yarn, process in which at least over is subject to the action of a donor raster and a compensation device of its accelerations / decelerations, this device comprising a movable member defining the trajectory of the wire of frame. This method is characterized in that it comprises a step of controlling the operation of a electric actuator for driving at least one drum of the frame donor according to a representative signal of the operation of a second electric actuator which drive itself the aforementioned movable member.

Grâce à l'invention, le donneur de trame peut, par la position angulaire de son tambour, non seulement fournir la juste quantité de fil nécessaire pour le tissage mais également lisser une partie des accélérations/décélérations violentes de la trame, ce qui permet de limiter en conséquence la compensation nécessaire. Par ailleurs, le dispositif de compensation ou « compensateur » de l'invention permet non seulement de lisser une partie des accélérations/décélérations violentes de la trame, mais également de fixer, dans une certaine mesure, la tension du fil de trame indépendamment de sa position angulaire. Il permet également d'ajuster à chaque instant la vitesse du donneur en fonction du besoin en trame, en autorisant des vitesses de déroulement variables.Thanks to the invention, the frame donor can, by the angular position of its drum, not only provide the just enough thread needed for weaving but also smooth some of the accelerations / decelerations of the frame, which makes it possible to limit in the necessary compensation. Moreover, compensating device or "compensator" of the invention makes it possible not only to smooth some of the violent acceleration / deceleration of the frame, but also to a certain extent to fix the tension of the weft yarn regardless of its angular position. he also allows you to adjust the speed of the according to the frame requirement, allowing variable unwinding speeds.

Selon des aspects avantageux, un procédé de contrôle de la tension d'alimentation d'un fil de trame peut incorporer une ou plusieurs des caractéristiques suivantes :

  • Le tambour entraíne le fil de trame par rotation, le fil étant enroulé sur le tambour et se déroulant, à partir de celui-ci, de façon tangentielle.
  • On utilise comme second actionneur un servomoteur électrique et on commande ce servomoteur à couple sensiblement constant. Ceci permet d'obtenir une tension sensiblement constante du fil de trame, entre le compensateur et la faucille.
  • La commande de la position angulaire du tambour est effectuée de telle sorte que la tension du fil de trame, en aval du donneur et du dispositif de compensation, est sensiblement égale à une valeur pré-déterminée.
According to advantageous aspects, a method for controlling the supply voltage of a weft thread may incorporate one or more of the following features:
  • The drum drives the weft yarn by rotation, the yarn being wound on the drum and taking place from it tangentially.
  • As the second actuator, an electric servomotor is used and this servomotor is controlled with a substantially constant torque. This makes it possible to obtain a substantially constant tension of the weft thread between the compensator and the sickle.
  • The control of the angular position of the drum is carried out so that the tension of the weft thread, downstream of the donor and the compensation device, is substantially equal to a predetermined value.

L'invention concerne également un dispositif d'alimentation en fil de trame d'un métier à tisser comportant au moins une faucille qui permet de mettre en oeuvre un procédé tel que précédemment décrit et, plus spécifiquement, un dispositif comprenant une réserve de fils de trame, au moins un tambour d'entraínement de fil de trame et au moins un dispositif de compensation de ses accélérations/décélérations de ce fil qui comporte un organe mobile définissant la trajectoire du fil de trame. Ce dispositif est caractérisé en ce que le tambour est entraíné en rotation par un premier actionneur électrique, en ce que l'organe mobile est entraíné par un second actionneur électrique et en ce que des moyens sont prévus pour mesurer la position de l'organe mobile précité, alors que des moyens sont également prévus pour commander le premier actionneur électrique en fonction du résultat de la mesure effectuée par les moyens de mesure.The invention also relates to a device weft feed of a loom with at least one sickle that allows to put in a process as previously described and, more specifically, a device comprising a reserve of weft threads, at least one thread drive drum frame and at least one compensation device for its accelerations / decelerations of this thread which comprises a movable member defining the trajectory of the weft yarn. This device is characterized in that the drum is driven in rotation by a first electric actuator, in that the movable member is driven by a second electric actuator and in that means are provided to measure the position of the aforementioned movable member, then that means are also provided to control the first electric actuator according to the result of the measurement carried out by the measuring means.

Grâce au dispositif de l'invention, la position du tambour d'entraínement, qui appartient en pratique au donneur de trame, peut être commandée d'une façon lui permettant de s'adapter en permanence aux mouvements de va-et-vient de la faucille et de compenser une partie des accélérations et décélérations violentes du fil de trame qui en résultent.Thanks to the device of the invention, the position of the drum training, which belongs in practice to the frame donor, can be ordered in a way to constantly adapt to the movements of back and forth sickle and compensate for some of the violent accelerations and decelerations of the weft thread resulting from it.

Selon des aspects avantageux mais non obligatoires, un dispositif d'alimentation en fil de trame peut incorporer une ou plusieurs des caractéristiques suivantes :

  • Les moyens de mesure sont aptes à détecter la position d'une partie mobile du second actionneur et à générer un signal électrique de commande de l'actionneur d'entraínement du tambour. Le second actionneur peut être un servomoteur rotatif ou un servomoteur linéaire. De façon avantageuse, le second actionneur est alimenté de façon à générer un couple sensiblement constant.
  • L'actionneur électrique peut entraíner plusieurs tambours, alors que les moyens de mesure sont aptes à déterminer la position commune de plusieurs organes mobiles qui définissent la trajectoire des fils de trame entraínés par ces tambours. Dans ce cas, un second actionneur peut être apte à déplacer simultanément les organes mobiles, alors que les moyens précités sont aptes à mesurer la position de se second actionneur et à générer un signal électrique de commande de l'actionneur d'entraínement des tambours.
According to advantageous but not mandatory aspects, a weft feeder can incorporate one or more of the following features:
  • The measuring means are able to detect the position of a moving part of the second actuator and to generate an electrical control signal of the drive actuator of the drum. The second actuator may be a rotary servomotor or a linear servomotor. Advantageously, the second actuator is powered to generate a substantially constant torque.
  • The electric actuator can drive several drums, while the measuring means are able to determine the common position of several movable members that define the trajectory of the weft son driven by these drums. In this case, a second actuator may be able to simultaneously move the movable members, while the aforementioned means are able to measure the position of the second actuator and to generate an electrical control signal of the drive actuator drums.

L'invention concerne enfin un métier à tisser à faucille équipé d'un dispositif d'alimentation tel que décrit ci-dessus. Un tel métier est plus facile à installer et peut fonctionner à une vitesse plus élevée que ceux de l'état de la technique.The invention finally relates to a loom for sickle equipped with a feeding device such as described above. Such a craft is easier to install and can operate at a higher speed than those of the state of the art.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaítront plus clairement à la lumière de la description qui va suivre de deux modes de réalisation d'un dispositif d'alimentation, d'un métier à tisser et d'un procédé de contrôle conformes à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une représentation schématique de principe d'un dispositif conforme à l'invention intégré dans un métier à tisser conforme à l'invention ;
  • la figure 2 est une représentation schématique de principe en perspective d'une partie du dispositif de la figure 1 et
  • la figure 3 est une représentation schématique de principe en perspective d'une partie d'un dispositif conforme à un second mode de réalisation de l'invention.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of two embodiments of a feeding device, a loom and a control method in accordance with its principle, given solely by way of example and with reference to the appended drawings in which:
  • Figure 1 is a schematic representation of a device according to the invention integrated in a loom according to the invention;
  • FIG. 2 is a schematic representation of a perspective view of part of the device of FIG.
  • Figure 3 is a schematic representation of perspective principle of a part of a device according to a second embodiment of the invention.

Le dispositif représenté aux figures 1 et 2 vise à permettre l'alimentation en fil de trame d'une faucille 1 animée d'un mouvement de pivotement oscillant, représenté par la flèche F2, autour d'un point fixe 2.The device represented in FIGS. 1 and 2 is intended to allow the weft feed of a sickle 1 animated with an oscillating pivoting movement, represented by the arrow F 2 , around a fixed point 2.

Compte tenu du mouvement oscillant F2 de la faucille 1, le fil de trame 3 est déplacé par rapport aux fils de chaíne 4 du métier M, ce qui permet de tisser un ruban R qui se déplace dans le sens de la flèche F3.Given the oscillating movement F 2 of the sickle 1, the weft thread 3 is moved relative to the warp threads 4 of the loom M, which makes it possible to weave a ribbon R which moves in the direction of the arrow F 3 .

La faucille 1 est alimentée en fil de trame 3 à partir d'une bobine 10. En partant de la bobine 10, le fil 3 traverse un oeillet fixe de guidage 11 et un frein de fil 12 connu en soi qui assure la tension du fil 3 en appliquant sur celui-ci une pression constante P1, cette pression étant réglable, comme représenté par la flèche F4. The sickle 1 is supplied with weft thread 3 from a spool 10. Starting from the spool 10, the thread 3 passes through a fixed guide eyelet 11 and a thread brake 12 known per se which ensures the tension of the thread 3 by applying on it a constant pressure P 1 , this pressure being adjustable, as represented by the arrow F 4 .

Après avoir traversé le frein de fil 12, le fil 3 longe un galet de renvoi 14 puis vient s'enrouler sur un tambour 15 appartenant à un donneur de trame 16 dont la fonction est de délivrer à la faucille 1 une quantité de fils 3 correspondant aux mouvements de va-et-vient de son extrémité libre 5. En pratique, le fil 3 peut être en appui sur environ 180° sur le tambour 15 ou faire un ou plusieurs tours autour de celui-ci.After passing through the wire brake 12, the wire 3 runs along a return roller 14 and then comes to wind on a drum 16 belonging to a frame donor 16 whose function is to deliver to the sickle 1 a quantity of son 3 corresponding to the movements of back and forth of his free end 5. In practice, the wire 3 can be in support about 180 ° on the drum 15 or do one or more rounds around this one.

Le donneur de trame 16 comprend également un servomoteur 17, par exemple un moteur brushless, commandé par une unité électronique adaptée 18.The frame donor 16 also includes a actuator 17, for example a brushless motor, controlled by a suitable electronic unit 18.

En aval du tambour 15, le fil 3 vient en appui sur un second galet 19 puis traverse un oeillet 20 monté à l'extrémité libre d'un bras 21 mobile entre les deux positions représentées en traits mixtes à la figure 1, ce qui permet à l'oeillet 20 de décrire une trajectoire globalement en arc de cercle C1.Downstream of the drum 15, the wire 3 bears on a second roller 19 and then passes through an eyelet 20 mounted at the free end of an arm 21 movable between the two positions shown in phantom in FIG. 1, which allows to the eyelet 20 to describe a trajectory globally in an arc C 1 .

La position du bras 21 est commandée par un second servomoteur 22, par exemple un moteur brushless qui est alimenté de façon à générer un couple sensiblement constant.The position of the arm 21 is controlled by a second servomotor 22, for example a brushless motor which is powered to generate a substantially constant.

A partir de l'oeillet 20, le fil 3 traverse un second oeillet fixe 23 puis traverse un oeillet 6 ménagé au niveau de l'extrémité libre 5 de la faucille 1.From the eyelet 20, the thread 3 passes through a second fixed eyelet 23 then through a eyelet 6 formed at the level of the free end 5 of the sickle 1.

Le couple C2 exercé par le moteur 22 sur le bras 21 influe directement sur la tension T du fil de trame 3 entre les oeillets 23 et 6.The torque C 2 exerted by the motor 22 on the arm 21 directly influences the tension T of the weft thread 3 between the eyelets 23 and 6.

On alimente le moteur 22, de telle sorte que, en tenant compte de la trajectoire du fil 3 entre les éléments 19, 20 et 23, la tension T soit sensiblement constante, la valeur de cette constante pouvant être réglée par le réglage de l'alimentation du moteur 22.The motor 22 is supplied so that, in taking into account the trajectory of wire 3 between the elements 19, 20 and 23, the voltage T is substantially constant, the value of this constant that can be set by the adjusting the motor power supply 22.

Un capteur 25 est installé à proximité du servomoteur 22 pour détecter la position angulaire  de son rotor 22a. A sensor 25 is installed near the actuator 22 for detecting the angular position of its rotor  22a.

Le capteur 25 est relié à l'unité 18 et son signal électrique de sortie S1 est fourni à cette unité pour commander le servomoteur 17 et par là même le tambour 15, de façon à délivrer une quantité de fil de trame 3 qui ramène en permanence le bras 21 dans la position souhaitée. De ce fait, le tambour 15 délivre la quantité de fil de trame 3 juste nécessaire aux mouvements de l'extrémité 5 de la faucille 1.The sensor 25 is connected to the unit 18 and its electrical output signal S 1 is supplied to this unit to control the servomotor 17 and thereby the drum 15, so as to deliver a quantity of weft yarn 3 which reduces Permanently the arm 21 in the desired position. As a result, the drum 15 delivers the amount of weft yarn 3 just needed for the movements of the end 5 of the sickle 1.

L'ensemble formé des éléments 20 à 21 constitue un dispositif de compensation ou « compensateur » 27 qui lisse une partie des accélérations/décélérations violentes auxquelles est soumis le fil de trame 3 du fait des mouvements de la faucille 1.The assembly formed of elements 20 to 21 constitutes a compensating device or "compensator" 27 that smooth some of the violent acceleration / deceleration to which the weft thread 3 is subjected because of movements of the sickle 1.

Ainsi, le donneur 16 fournit la juste quantité de fil nécessaire pour le tissage et participe au lissage des accélérations/décélérations violentes du fil de trame dans la mesure où le signal S1 permet d'ajuster l'avance du fil de trame en fonction de la position du bras 21. En outre, le compensateur 27 permet de donner une tension T sensiblement constante et de valeur désirée au fil de trame à proximité de la faucille, ceci de façon relativement indépendante de la position de la faucille lors de son mouvement F2.Thus, the donor 16 provides the right amount of yarn required for weaving and participates in the smoothing of the violent accelerations / decelerations of the weft yarn, since the signal S 1 makes it possible to adjust the advance of the weft thread as a function of the position of the arm 21. In addition, the compensator 27 makes it possible to give a tension T substantially constant and of desired value to the weft thread in the vicinity of the sickle, this relatively independently of the position of the sickle during its movement F 2 .

En d'autres termes, l'invention permet d'ajuster, à chaque instant, la vitesse du donneur 16 en fonction du besoin en fil de trame, de sorte que la quantité de fil fournie par le donneur 16 est toujours en adéquation avec le besoin en fil de trame qui a, par ailleurs, une tension T sensiblement constante.In other words, the invention makes it possible to each moment, the speed of the donor 16 according to the need in weft yarn, so the amount of yarn provided by the donor 16 is always in line with the need for weft yarn which has, moreover, a tension T substantially constant.

La juxtaposition de plusieurs dispositifs conformes à l'invention permet d'obtenir une même tension pour les différents fils de trame utilisés dans un même métier à tisser équipé de plusieurs faucilles. The juxtaposition of several devices in accordance with the invention makes it possible to obtain the same voltage for the different weft threads used in the same trade to weave equipped with several sickles.

Dans ce cas, et comme représenté à la figure 3, un unique servomoteur 17 peut être utilisé pour entraíner, autour d'un même axe A-A', plusieurs tambours 151 à 15n qui sont en nombre correspondant au nombre de faucilles 11 à 1n. Un unique servomoteur 22 est, par ailleurs, utilisé pour entraíner, simultanément et autour d'un autre axe B-B', n bras 211 à 21n dans les oeillets 201 à 20n desquels passent les fils de trame 31 à 3n. Le couple C2 exercé par le servomoteur 22 est ajusté pour tenir compte du nombre de bras 211 à 21n à entraíner.In this case, and as represented in FIG. 3, a single servomotor 17 may be used to drive, around a same axis A-A ', several drums 15 1 to 15 n which are in number corresponding to the number of sickles 1 1 to 1 n . A single servomotor 22 is, moreover, used to drive, simultaneously and around another axis B-B ', n arm 21 1 to 21 n in the eyelets 20 1 to 20 n which pass the weft son 3 1 to 3 n . The torque C 2 exerted by the servomotor 22 is adjusted to take into account the number of arms 21 1 to 21 n to drive.

Comme précédemment, un signal électrique S1 est utilisé par une unité de commande 18 pour piloter le moteur 17 en fonction de la position angulaire du moteur 22 détectée par un capteur 25.As before, an electrical signal S 1 is used by a control unit 18 to drive the motor 17 as a function of the angular position of the motor 22 detected by a sensor 25.

L'invention peut également être mise en oeuvre lorsque chaque faucille est alimentée avec plusieurs fils de trame. Dans ce cas, on utilise autant de donneurs que de fils et les fils sont sélectionnés et présentés à la faucille par un sélecteur de trame usuel.The invention can also be implemented when each sickle is fed with several weft threads. In this case, we use as many donors as sons and the threads are selected and presented to the sickle by a usual frame selector.

Par ailleurs, un seul couple de donneur 16 et de compensateur 27 peut être utilisé pour une gamme étendue de tensions de fil de trame dans la mesure où seul le réglage du couple du servomoteur 22 permet d'ajuster cette tension.In addition, only one donor pair 16 and compensator 27 can be used for a wide range of weft thread tensions since only the setting the torque of the servomotor 22 makes it possible to adjust this voltage.

En pratique, quel que soit le mode de réalisation, les servomoteurs 17 et 22 sont structurellement identiques.In practice, whatever the embodiment, the Servomotors 17 and 22 are structurally identical.

Selon une variante non représentée de l'invention, le moteur 22 peut être remplacé par un moteur linéaire au sein du compensateur 27.According to a not shown variant of the invention, the motor 22 can be replaced by a linear motor within compensator 27.

Claims (12)

Procédé de contrôle de la tension d'alimentation d'au moins un fil de trame, dans un métier à tisser comportant au moins une faucille, à partir d'une réserve de fils, procédé dans lequel au moins un fil est soumis à l'action d'un donneur de trame à tambour et d'un dispositif de compensation de ses accélérations/décélérations qui comprend un organe mobile définissant la trajectoire dudit fil, caractérisé en ce qu'il comprend une étape consistant à commander le fonctionnement d'un premier actionneur électrique (17) d'entraínement d'au moins un tambour (15) du donneur de trame (16) en fonction d'un signal (S1) représentatif du fonctionnement d'un second actionneur électrique (22) qui entraíne lui-même ledit organe mobile (20, 21).A method for controlling the supply tension of at least one weft yarn in a loom having at least one sickle from a yarn store, wherein at least one yarn is subjected to action of a drum frame donor and a device for compensating its accelerations / decelerations which comprises a movable member defining the trajectory of said wire, characterized in that it comprises a step of controlling the operation of a first electric actuator (17) for driving at least one drum (15) of the weft donor (16) as a function of a signal (S 1 ) representative of the operation of a second electric actuator (22) which results in even said movable member (20, 21). Procédé selon l'une des revendications précédentes, caractérisé en ce que ledit tambour (15) entraíne le fil de trame (3) par rotation, le fil étant enroulé sur le tambour et se déroulant, à partir de celui-ci de façon tangentielle.Method according to one of the preceding claims, characterized in that said drum (15) drives the weft yarn (3) by rotation, the yarn being wound on the drum and taking place from it tangentially. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'on utilise comme second actionneur un servomoteur électrique (22) et en ce qu'on commande ledit servomoteur à couple sensiblement constant.Method according to one of the preceding claims, characterized in that an electric servomotor (22) is used as the second actuator and in that said servomotor with a substantially constant torque is controlled. Procédé selon l'une des revendications précédentes, caractérisé en ce que la commande de la position angulaire dudit tambour (15) est effectuée de telle sorte que la tension (T) du fil de trame (3) en aval dudit donneur (16) et dudit dispositif de compensation (27) est sensiblement égale à une valeur pré-déterminée.Method according to one of the preceding claims, characterized in that the control of the angular position of said drum (15) is carried out so that the tension (T) of the weft thread (3) downstream of said donor (16) and said compensation device (27) is substantially equal to a predetermined value. Dispositif d'alimentation en fil de trame d'un métier à tisser comportant au moins une faucille, ledit dispositif comprenant une réserve de fils de trame, au moins un tambour d'entraínement de fil de trame et au moins un dispositif de compensation des accélérations/décélérations du fil de trame comportant un organe mobile définissant la trajectoire du fil de trame, caractérisé en ce que ledit tambour (15) est entraíné en rotation par un premier actionneur électrique (17), en ce que ledit organe mobile (20, 21) est déplacé par un second actionneur électrique (22) et en ce que des moyens (25) sont prévus pour mesurer la position () dudit organe mobile (20, 21), alors que des moyens (18) sont également prévus pour commander ledit premier actionneur en fonction du résultat (Si) de la mesure effectuée par lesdits moyens de mesure.Weft feeder for a loom comprising at least one sickle, said device comprising a reserve of weft threads, at least one weft threading drum and at least one accelerator compensation device / decelerations of the weft yarn comprising a movable member defining the trajectory of the weft yarn, characterized in that said drum (15) is rotated by a first electric actuator (17), in that said movable member (20, 21 ) is moved by a second electric actuator (22) and in that means (25) are provided for measuring the position () of said movable member (20, 21), while means (18) are also provided for controlling said first actuator as a function of the result (Si) of the measurement made by said measuring means. Dispositif selon la revendication 5, caractérisé en ce que lesdits moyens de mesure (25) sont aptes à détecter la position () d'une partie mobile (22a) dudit second actionneur (22) et à générer un signal électrique (S1) de commande du premier actionneur (17).Device according to claim 5, characterized in that said measuring means (25) are able to detect the position () of a movable part (22 a ) of said second actuator (22) and to generate an electrical signal (S 1 ) for controlling the first actuator (17). Dispositif selon la revendication 6, caractérisé en ce que ledit second actionneur (22) est un servomoteur rotatif.Device according to claim 6, characterized in that said second actuator (22) is a rotary servomotor. Dispositif selon la revendication 6, caractérisé en ce que ledit second actionneur est un servomoteur linéaire.Device according to claim 6, characterized in that said second actuator is a linear servomotor. Dispositif selon l'une des revendications 7 ou 8, caractérisé en ce que ledit second actionneur (22) est alimenté de façon à générer un couple (C2) sensiblement constant.Device according to one of claims 7 or 8, characterized in that said second actuator (22) is powered to generate a torque (C 2 ) substantially constant. Dispositif selon l'une des revendications 5 à 9, caractérisé en ce que ledit actionneur électrique (17) entraíne plusieurs tambours (151-15n), alors que lesdits moyens de mesure (25) sont aptes à déterminer la position () de plusieurs organes mobiles (201-20n, 211-21n) définissant la trajectoire des fils (31-3n) entraínés par lesdits tambours. Device according to one of claims 5 to 9, characterized in that said electric actuator (17) drives several drums (15 1 -15 n ), whereas said measuring means (25) are able to determine the position () several movable members (20 1 -20 n , 21 1 -21 n ) defining the path of the son (3 1 -3 n ) driven by said drums. Dispositif selon la revendication 10, caractérisé en ce qu'un second actionneur (22) est apte à déplacer simultanément lesdits organes mobiles (20, 21) et en ce que lesdits moyens (25) sont aptes à mesurer la position () dudit second actionneur et à générer un signal électrique (S1) de commande de l'actionneur (17) d'entraínement des tambours.Device according to claim 10, characterized in that a second actuator (22) is able to simultaneously move said movable members (20, 21) and in that said means (25) are able to measure the position () of said second actuator and to generate an electrical signal (S 1 ) for controlling the actuator (17) for driving the drums. Métier à tisser (M) à faucille (1) équipé d'un dispositif d'alimentation en fil de trame (10-27) selon l'une des revendications 5 à 11.Weaving machine (M) with sickle (1) equipped with a weft feeder (10-27) according to one of claims 5 to 11.
EP04356206A 2003-12-24 2004-12-23 Method of controlling the feeding tension of at least one weft yarn, weft yarn feeding device and loom with such a weft yarn feeding device Active EP1550751B1 (en)

Applications Claiming Priority (2)

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FR0315397A FR2864555B1 (en) 2003-12-24 2003-12-24 METHOD FOR MONITORING THE SUPPLY VOLTAGE OF AT LEAST ONE FRAME WIRE, FRAME WIRE FEEDER, AND WEAVING WIRE EQUIPPED WITH SUCH A DEVICE
FR0315397 2003-12-24

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CN105177834A (en) * 2015-09-28 2015-12-23 嵊州市中森电子有限公司 Inlet and outlet weft regulating system for weft accumulator
CN105177831A (en) * 2015-09-28 2015-12-23 嵊州市中森电子有限公司 Weft accumulator with tension adjusting device
CN105332149A (en) * 2015-10-21 2016-02-17 嵊州市中森电子有限公司 Tension-controllable weft storage unit
CN106811856A (en) * 2016-12-29 2017-06-09 重庆节之道竹业有限公司 A kind of weaving machinery bringer mechanism

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TW201319347A (en) * 2011-11-15 2013-05-16 Kyang Yhe Delicate Machine Co Ltd Device to convey and control weft yarn
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KR101554967B1 (en) * 2015-03-04 2015-09-22 주식회사 유니웜 Apparatus controling tension of metallic thread and method for weaving planar heating element using the same
CN105568512B (en) * 2016-01-15 2017-08-25 佛山慈慧通达科技有限公司 Three-dimensional loom weft tension controlling organization and its application method
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CN105177834A (en) * 2015-09-28 2015-12-23 嵊州市中森电子有限公司 Inlet and outlet weft regulating system for weft accumulator
CN105177831A (en) * 2015-09-28 2015-12-23 嵊州市中森电子有限公司 Weft accumulator with tension adjusting device
CN105177834B (en) * 2015-09-28 2018-04-10 福建梭罗复合材料研究有限公司 A kind of disengaging parallel regulation and control system of weft accumulator
CN105332149A (en) * 2015-10-21 2016-02-17 嵊州市中森电子有限公司 Tension-controllable weft storage unit
CN105332149B (en) * 2015-10-21 2018-05-29 泉州市新空间装饰工程有限公司 A kind of controllable weft accumulator of tension
CN106811856A (en) * 2016-12-29 2017-06-09 重庆节之道竹业有限公司 A kind of weaving machinery bringer mechanism

Also Published As

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EP1550751B1 (en) 2012-07-25
KR101156593B1 (en) 2012-06-20
FR2864555A1 (en) 2005-07-01
CN1637185A (en) 2005-07-13
CN1637185B (en) 2010-06-16
KR20050065309A (en) 2005-06-29
FR2864555B1 (en) 2006-01-27

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