EP1793027B3 - Device for positioning a moving transport belt in a machine for the thermal treatment of yarns - Google Patents

Device for positioning a moving transport belt in a machine for the thermal treatment of yarns Download PDF

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Publication number
EP1793027B3
EP1793027B3 EP06301188.6A EP06301188A EP1793027B3 EP 1793027 B3 EP1793027 B3 EP 1793027B3 EP 06301188 A EP06301188 A EP 06301188A EP 1793027 B3 EP1793027 B3 EP 1793027B3
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EP
European Patent Office
Prior art keywords
frame
movable door
conveyor belt
positioning
rollers
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EP06301188.6A
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German (de)
French (fr)
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EP1793027B1 (en
EP1793027A1 (en
Inventor
Philippe Massotte
Michel Mazoyer
Serge Munschi
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Superba SAS
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Superba SAS
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Publication of EP1793027B1 publication Critical patent/EP1793027B1/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
    • D06B23/04—Carriers or supports for textile materials to be treated
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
    • D06B23/14—Containers, e.g. vats
    • D06B23/18—Sealing arrangements

Definitions

  • the present relates to the field of the textile industry, in particular the treatment of son by means of heat treatment machines commonly called heat-setting machines, and relates to a device for positioning the conveying conveyor belt in such machines.
  • the heat treatment machines essentially consist of a pressurized heat treatment chamber for textile threads deposited on a conveyor belt passing through said chamber, which is closed at its two ends by sealing heads, each comprising a frame or mobile door attached to the housing.
  • pressurized vessel a pair of superposed horizontal rollers which are pressed against the opposite faces of the conveyor belt and sealing means to form a seal between the rollers and the frame, see for example US 5,074,130 .
  • the horizontal rollers are actuated by clamping means allowing at least one of the rollers to move towards the other, in order to clamp them against the conveyor belt.
  • the sealing heads are mounted, each via its frame or movable door, pivotally relative to a vertical central axis and are connected to the treatment chamber via a bellows extending between the vertical pivot axis and the frame or movable door of said sealing heads.
  • the conveyor belt may undergo a drift between the inlet and outlet of the heat treatment machine, drift may cause, in case of exceeding a predetermined limit, a risk of snagging inside of the machine, which can cause at least stops of the machine to remedy the problem, or even damage.
  • the conveyor belt is pivotally driven, because of its nip between the longitudinal rollers, along a transverse generatrix, which induces a corresponding rectification of the latter, to correct its drift and bring it back to its normal service position.
  • the means for detecting and correcting the position of the conveyor belt of such machines are perfectly suitable for ensuring a good positioning of said conveyor belt.
  • the object of the present invention is to overcome these drawbacks by proposing a device for positioning the moving conveyor belt in wire heat treatment machines making it possible to continuously control and straighten the drift of said conveyor belt, while limiting the amplitude of the movements of the sealing heads.
  • the positioning device of the conveyor belt according to the invention intended to equip heat treatment machines son, essentially consisting of a pressurized chamber crossed by a conveyor belt and closed at each end by a head sealing member mounted on a frame or movable door connected to the pressurized enclosure via a bellows, each sealing head having a pair of superposed horizontal rollers which are pressed against the opposite faces of the conveyor belt, is characterized in that it comprises a positioning means and a position control means acting on a very short area in the immediate vicinity of each sealing head, and, furthermore, characterized in that the position control means is constituted by at least one position sensor disposed near at least one edge of the conveyor belt, close to the superposed horizontal rollers of the sealing head, this sensor being a proportional analog sensor connected to a calculating means delivering a correction signal a servo-drive controller of an actuator drive motor constituting the positioning means of the frame or movable door.
  • FIG. 1 of the accompanying drawings represents, by way of example, a wire heat treatment machine, consisting essentially of a pressurized enclosure 1 traversed by a conveyor belt 2 and closed at each end by a sealing head mounted on a frame or mobile door 3 connected to the pressurized enclosure 1 via a bellows 4, each sealing head having a pair of superposed horizontal rollers 5, 6 which are pressed against the opposite faces of the conveyor belt 2.
  • this son heat treatment machine is equipped with a positioning device 7 of this carpet.
  • FIG. 1 to 3 drawings attached only one end of a wire heat treatment machine is shown in sectional and plan view, so that only one roller of the pair of rollers 5 and 6 forming the sealing head is visible. Furthermore, it is clear that the not shown end of the son heat treatment machine is symmetrical to that shown in said appended drawings.
  • the positioning device 7 comprises a positioning means 8 and a position control means 9 acting on a very short area in the immediate vicinity of each sealing head.
  • the positioning means 8 consists, according to the preferred embodiment according to the figure 1 , in a pivot axis 10 of the frame or movable door 3 secured directly with said frame or movable door 3 and in an actuator 11 of pivoting of the frame or movable door 3 via a linkage 12 mounted between the edge of the frame or mobile door 3 and said actuator 11.
  • the latter is advantageously constituted in the form of a screw jack.
  • the position control means 9 is constituted by at least one position sensor disposed near at least one edge of the conveyor belt 2, near the superimposed horizontal rollers 5 and 6 of the sealing head, this sensor being a sensor proportional analogue connected to a calculation means 13 delivering a correction signal to a servo-drive 14 for controlling a drive motor 15 of the actuator 11 constituting the positioning means 8 of the frame or movable door 3.
  • the sensor forming the position control means 9 is an optical sensor extending on either side of a selvedge of the conveyor belt 2.
  • the sensor forming the control means in the form of a pneumatic sensor, with a current of foucauld or with probe. The operation of such sensors is known to those skilled in the art and will not be described in detail.
  • the position control means 9 may be completed by a security device consisting of detection cells 16 extending laterally on either side of the conveyor belt 2 upstream or downstream of the sensor forming the means of detection. position control 9, these detection cells 16 may be of the same type as the latter.
  • the calculation means 13 of the positioning means 8 and the position control means 9 equipping the sealing heads of the two ends of the son heat treatment machines are advantageously connected to each other and the positioning means 8 of the frame or movable door 3 are arranged in a reverse manner so as to achieve the same direction of movement for the two sealing heads.
  • the positioning means 8 of the frame or movable door 3 are arranged in a reverse manner so as to achieve the same direction of movement for the two sealing heads.
  • the belt 2 scrolls in the longitudinal direction of the treatment line passing through said machine and, when the belt deviates from its trajectory to the left or to the right, its deviation is measured close to the sealing head by the position control means 9, which transmits the data read by calculation means 13.
  • the calculation means 13 determines a deflection correction to realize and delivers a control signal corresponding to the drive servo-drive 14 of the actuating motor 15 of the screw jack 11.
  • the latter then drives the linkage 12 in a pivoting movement about an axis 12 'having the effect to cause a corresponding pivoting of the frame or movable door 3 about the axis 10 and thus a corresponding angular displacement of the sealing head. It follows that the rollers 5, 6 of the latter, which enclose the conveyor belt 2, cause a ripping of said conveyor belt 2 corresponding to the pivoting direction of the sealing head and the frame or movable door 3. The conveyor belt 2 is, therefore, brought back in a normal scrolling direction within the allowed tolerances.
  • the pivot actuator of the frame or movable door 3 can also act directly on said frame or movable door 3 and be constituted, for this purpose, by a toothed sector 17 secured at one end with said frame or movable door 3 and by a pinion 18 meshing with said toothed sector 17 and driven by a stepping motor 19 controlled by means of the servo-variator 14.
  • the transmission elements of the pivoting movement to the frame or movable door 3 are limited to a minimum, which reduces the risk of mechanical incidents, as well as maintenance work.
  • FIG. figure 3 of the accompanying drawings it is also possible, according to another embodiment of the invention, shown in FIG. figure 3 of the accompanying drawings, to constitute the pivoting actuator of the frame or movable door 3 in the form of a toothed sector 17 secured at one end to said frame or movable door 3 and a rack 20 meshing with said toothed sector 17 and driven by a screw jack 21, whose motor 22 is controlled via the servo-variator 14.
  • This embodiment allows obtaining results and advantages comparable to those obtained by means of the device according to the figure 2 .
  • the positioning means 8 can be made directly by the horizontal rollers 5, 6 of the sealing heads, at least one of these rollers being assignable at its application pressure ends on the conveyor belt 2. different, by individual control actuators 23 pressurizing the ends of these rollers.
  • the positioning device 7 in the form of an assembly comprising a single positioning means disposed inside the enclosure 1 of the heat treatment machine son and position control means 9 acting in the immediate vicinity of each sealing head.
  • the single positioning means can be made in the form of two rollers 5 ', 6' disposed inside the treatment chamber 1, substantially in the middle thereof, and clamped on both sides. against the conveyor belt 2, in the manner of the horizontal rollers 5 and 6 of the sealing heads, clamping the ends of these rollers 5 ', 6' towards the conveyor belt 2 is effected independently and in a controlled manner by means of of actuator cylinders 23 '.
  • the recovery of the conveyor belt 2 by ripping can also be performed by applying a higher drive pressure on an edge of the conveyor belt, so that it is automatically rectified in the opposite direction. Indeed, increasing the pressure of the rollers on one edge of the conveyor belt causes an increased drive effect of said edge or a relative sliding effect of the other edge, so that the conveyor belt 2 naturally tends to undergo a modification of its alignment.
  • An embodiment of a son heat treatment machine makes it possible to considerably modify the constitution of the heat treatment machine, because the frame or mobile door 3 can be replaced by a fixed device closure of the ends of the treatment chamber, of simpler constitution and no longer requiring junction bellows with said enclosure.
  • the invention it is possible to perfectly control the drift of a conveyor belt, that it is perfectly new and straightened or worn and having deformations such as an arrow or corrugations by a continuous correction of said drift .
  • This correction is advantageously performed by performing micro pivoting of the frame or movable door 3, regardless of the speed of travel of the carpet and possibly also when the latter is subjected to backward movements of relatively short length.
  • the invention therefore makes it possible to position perfectly, over a given portion of its length, a conveyor belt 2 of great length, in continuous movement in a plane. Indeed, the deflection correction of the conveyor belt 2 is performed without changing the direction of the carpet out of the plane by means of return rollers or the like, as is customary to do, for example for the guidance of moving strips.

Description

La présente concerne le domaine de l'industrie textile, en particulier du traitement de fils au moyen de machines de traitement thermique couramment appelées machines de thermofixation, et a pour objet un dispositif de positionnement du tapis transporteur en défilement dans de telles machines.The present relates to the field of the textile industry, in particular the treatment of son by means of heat treatment machines commonly called heat-setting machines, and relates to a device for positioning the conveying conveyor belt in such machines.

Les machines de traitement thermique sont essentiellement constituées par une enceinte pressurisée de traitement thermique de fils textiles déposés sur un tapis transporteur traversant ladite enceinte, qui est fermée à ses deux extrémités par des têtes d'étanchéité comportant chacune un bâti ou porte mobile fixé à l'enceinte pressurisée, une paire de rouleaux horizontaux superposés qui sont pressés contre les faces opposées du tapis transporteur et des moyens d'étanchéité pour former une fermeture étanche entre les rouleaux et le bâti, voir par exemple US 5,074,130 .The heat treatment machines essentially consist of a pressurized heat treatment chamber for textile threads deposited on a conveyor belt passing through said chamber, which is closed at its two ends by sealing heads, each comprising a frame or mobile door attached to the housing. pressurized vessel, a pair of superposed horizontal rollers which are pressed against the opposite faces of the conveyor belt and sealing means to form a seal between the rollers and the frame, see for example US 5,074,130 .

Les rouleaux horizontaux sont actionnés par des moyens de serrage permettant un déplacement d'au moins un des rouleaux en direction de l'autre, en vue de leur serrage contre le tapis transporteur. En outre, les têtes d'étanchéité sont montées, chacune par l'intermédiaire de son bâti ou porte mobile, de manière pivotante par rapport à un axe médian vertical et sont reliées à l'enceinte de traitement par l'intermédiaire d'un soufflet s'étendant entre l'axe de pivotement vertical et le bâti ou porte mobile desdites têtes d'étanchéité.The horizontal rollers are actuated by clamping means allowing at least one of the rollers to move towards the other, in order to clamp them against the conveyor belt. In addition, the sealing heads are mounted, each via its frame or movable door, pivotally relative to a vertical central axis and are connected to the treatment chamber via a bellows extending between the vertical pivot axis and the frame or movable door of said sealing heads.

En cours de fonctionnement, le tapis transporteur peut subir une dérive entre l'entrée et la sortie de la machine de traitement thermique, dérive risquant de provoquer, en cas de dépassement d'une limite prédéterminée, un risque d'accrochage à l'intérieur de la machine, ce qui peut entraîner pour le moins des arrêts de la machine en vue de remédier au problème, voire des détériorations.During operation, the conveyor belt may undergo a drift between the inlet and outlet of the heat treatment machine, drift may cause, in case of exceeding a predetermined limit, a risk of snagging inside of the machine, which can cause at least stops of the machine to remedy the problem, or even damage.

Actuellement, ce problème est solutionné par prévision d'un positionnement du tapis transporteur entre les têtes d'entrée et de sortie par l'intermédiaire de cellules de détection de la positon de ladite bande aux extrémités de la machine, c'est-à-dire près des têtes d'étanchéité, ces cellules de détection délivrant un signal de commande de modification de la position des têtes au moyen d'actionneurs agissant sur le bâti ou porte mobile de ces dernières pour provoquer leur pivotement. Un tel pivotement des têtes d'étanchéité a pour effet de modifier la position de l'axe des rouleaux d'étanchéité, de telle sorte que le tapis transporteur est redressé en direction opposée de la déviation constatée, ce du fait du pincement du tapis transporteur entre les rouleaux horizontaux superposés. En effet, lors du pivotement de la tête d'étanchéité le tapis transporteur est entraîné en pivotement, du fait de son pincement entre les rouleaux longitudinaux, suivant une génératrice transversale, ce qui induit un redressement correspondant de cette dernière, afin de corriger sa dérive et de la ramener dans sa position de service normale.Currently, this problem is solved by predicting a positioning of the conveyor belt between the input and output heads via positon detection cells of said strip at the ends of the machine, that is to say say near the sealing heads, these detection cells delivering a control signal for changing the position of the heads by means of actuators acting on the frame or mobile door thereof to cause their pivoting. Such pivoting sealing heads have the effect of changing the position of the axis of the sealing rollers, so that the conveyor belt is straightened in the opposite direction of the observed deflection, due to the nip of the conveyor belt between the rollers horizontal overlapping. Indeed, during the pivoting of the sealing head the conveyor belt is pivotally driven, because of its nip between the longitudinal rollers, along a transverse generatrix, which induces a corresponding rectification of the latter, to correct its drift and bring it back to its normal service position.

Généralement, les moyens de détection et de correction de position du tapis transporteur de telles machines conviennent parfaitement pour assurer un bon positionnement dudit tapis transporteur. Cependant, il se pose un problème de détection et donc de correction de la déviation lorsque le tapis transporteur, suite à son vieillissement, s'incurve. En effet, les capteurs de position du tapis transporteur à l'entrée et à la sortie de la machine sont sensibles à la déformation de ce tapis transporteur.Generally, the means for detecting and correcting the position of the conveyor belt of such machines are perfectly suitable for ensuring a good positioning of said conveyor belt. However, there is a problem of detection and thus correction of the deflection when the conveyor belt, following aging, is curved. Indeed, the position sensors of the conveyor belt at the entrance and exit of the machine are sensitive to the deformation of the conveyor belt.

Par ailleurs, du fait du montage des bâtis ou portes mobiles des têtes d'étanchéité, chacun sur un axe de pivotement vertical prévu à distance desdits bâtis ou portes mobiles des têtes d'étanchéité, il est nécessaire de tenir compte de manière anticipée du pivotement desdites têtes d'étanchéité, qui est augmenté par un effet de bras de levier dû à la distance entre l'axe de pivotement et le plan des rouleaux horizontaux superposés et de la distance entre les capteurs et les têtes, entraînant une amplification du redressement de la dérive constatée.Moreover, because of the mounting of the frames or mobile doors of the sealing heads, each on a vertical pivot axis provided at a distance from said frames or movable doors of the sealing heads, it is necessary to take account in advance of the pivoting. of said sealing heads, which is increased by a lever effect due to the distance between the pivot axis and the plane of the superposed horizontal rollers and the distance between the sensors and the heads, resulting in an amplification of the rectification of the the drift found.

De plus, le montage des têtes d'étanchéité de la manière décrite ci-dessus induit un porte-à-faux important des têtes et donc des contraintes correspondantes sur l'axe de pivotement, nécessitant un dimensionnement correspondant de l'ensemble des éléments de montage desdites têtes.In addition, the mounting of the sealing heads in the manner described above induces a significant overhang of the heads and therefore the corresponding stresses on the pivot axis, requiring a corresponding dimensioning of all the elements of the mounting said heads.

La présente invention a pour but de pallier ces inconvénients en proposant un dispositif de positionnement du tapis transporteur en défilement dans des machines de traitement thermique de fils permettant de contrôler et de redresser en continu la dérive dudit tapis transporteur, tout en limitant l'amplitude des mouvements des têtes d'étanchéité.The object of the present invention is to overcome these drawbacks by proposing a device for positioning the moving conveyor belt in wire heat treatment machines making it possible to continuously control and straighten the drift of said conveyor belt, while limiting the amplitude of the movements of the sealing heads.

A cet effet, le dispositif de positionnement du tapis transporteur conforme à l'invention, destiné à équiper des machines de traitement thermique de fils, essentiellement constituées par une enceinte pressurisée traversée par un tapis transporteur et fermée à chaque extrémité par une tête d'étanchéité montée sur un bâti ou porte mobile relié à l'enceinte pressurisée par l'intermédiaire d'un soufflet, chaque tête d'étanchéité comportant une paire de rouleaux horizontaux superposés qui sont pressés contre les faces opposées du tapis transporteur, est caractérisé en ce qu'il comporte un moyen de positionnement et un moyen de contrôle de position agissant sur une zone très courte à proximité immédiate de chaque tête d'étanchéité, et, de plus, caractérisé en ce que le moyen de contrôle de position est constitué par au moins un capteur de position disposé près d'au moins un bord du tapis transporteur, à proximité des rouleaux horizontaux superposés de la tête d'étanchéité, ce capteur étant un capteur analogique proportionnel relié à un moyen de calcul délivrant un signal de correction à un servo-variateur de commande d'un moteur d'entraînement de l'actionneur constitutif du moyen de positionnement du bâti ou porte mobile.For this purpose, the positioning device of the conveyor belt according to the invention, intended to equip heat treatment machines son, essentially consisting of a pressurized chamber crossed by a conveyor belt and closed at each end by a head sealing member mounted on a frame or movable door connected to the pressurized enclosure via a bellows, each sealing head having a pair of superposed horizontal rollers which are pressed against the opposite faces of the conveyor belt, is characterized in that it comprises a positioning means and a position control means acting on a very short area in the immediate vicinity of each sealing head, and, furthermore, characterized in that the position control means is constituted by at least one position sensor disposed near at least one edge of the conveyor belt, close to the superposed horizontal rollers of the sealing head, this sensor being a proportional analog sensor connected to a calculating means delivering a correction signal a servo-drive controller of an actuator drive motor constituting the positioning means of the frame or movable door.

L'invention sera mieux comprise, grâce à la description ci-après, qui se rapporte à des modes de réalisation préférés, donnés à titre d'exemples non limitatifs, et expliqués avec référence aux dessins schématiques annexés, dans lesquels :

  • la figure 1 est une vue partielle en plan et en coupe d'une machine de traitement thermique de fils équipée du dispositif conforme à l'invention ;
  • les figures 2 et 3 sont des vues analogues à celle de la figure 1 de variantes de réalisation de l'invention ;
  • les figures 4 et 5 sont des vues en coupe, respectivement en élévation frontale et en élévation latérale d'une autre variante de réalisation de l'invention, et
  • les figures 6 et 7 sont des vues analogues à celles des figures 4 et 5 d'une autre variante de réalisation de l'invention.
The invention will be better understood, thanks to the following description, which refers to preferred embodiments, given by way of non-limiting examples, and explained with reference to the appended diagrammatic drawings, in which:
  • the figure 1 is a partial plan and sectional view of a wire heat treatment machine equipped with the device according to the invention;
  • the Figures 2 and 3 are views similar to that of the figure 1 embodiments of the invention;
  • the Figures 4 and 5 are views in section, respectively in front elevation and side elevation of another embodiment of the invention, and
  • the Figures 6 and 7 are views similar to those of Figures 4 and 5 of another embodiment of the invention.

La 1 figure des dessins annexés représente, à titre d'exemple, une machine de traitement thermique de fils, essentiellement constituée par une enceinte pressurisée 1 traversée par un tapis transporteur 2 et fermée à chaque extrémité par une tête d'étanchéité montée sur un bâti ou porte mobile 3 relié à l'enceinte pressurisée 1 par l'intermédiaire d'un soufflet 4, chaque tête d'étanchéité comportant une paire de rouleaux horizontaux superposés 5, 6 qui sont pressés contre les faces opposées du tapis transporteur 2. En vue d'éviter une dérive inadmissible du tapis transporteur, cette machine de traitement thermique de fils est équipée d'un dispositif de positionnement 7 de ce tapis. Dans les figures 1 à 3 des dessins annexés, seule une extrémité d'une machine de traitement thermique de fils est représentée en vue en coupe et en plan, de sorte que seul un rouleau de la paire de rouleaux 5 et 6 formant la tête d'étanchéité est visible. Par ailleurs, il est clair que l'extrémité non représentée de la machine de traitement thermique de fils se présente de manière symétrique à celle représentée sur lesdits dessins annexés.1 of the accompanying drawings represents, by way of example, a wire heat treatment machine, consisting essentially of a pressurized enclosure 1 traversed by a conveyor belt 2 and closed at each end by a sealing head mounted on a frame or mobile door 3 connected to the pressurized enclosure 1 via a bellows 4, each sealing head having a pair of superposed horizontal rollers 5, 6 which are pressed against the opposite faces of the conveyor belt 2. In view to prevent inadmissible drift of the conveyor belt, this son heat treatment machine is equipped with a positioning device 7 of this carpet. In the Figures 1 to 3 drawings attached, only one end of a wire heat treatment machine is shown in sectional and plan view, so that only one roller of the pair of rollers 5 and 6 forming the sealing head is visible. Furthermore, it is clear that the not shown end of the son heat treatment machine is symmetrical to that shown in said appended drawings.

Conformément à l'invention et comme le montrent, à titre d'exemples, les figures 1 à 3 des dessins annexés, le dispositif de positionnement 7 comporte un moyen de positionnement 8 et un moyen de contrôle de position 9 agissant sur une zone très courte à proximité immédiate de chaque tête d'étanchéité.According to the invention and as shown by way of examples, the Figures 1 to 3 In the accompanying drawings, the positioning device 7 comprises a positioning means 8 and a position control means 9 acting on a very short area in the immediate vicinity of each sealing head.

Le moyen de positionnement 8 consiste, suivant le mode de réalisation préférentiel selon la figure 1, en un axe 10 de pivotement du bâti ou porte mobile 3 solidarisé directement avec ledit bâti ou porte mobile 3 et en un actionneur 11 de pivotement du bâti ou porte mobile 3 par l'intermédiaire d'une tringlerie 12 montée entre le bord du bâti ou porte mobile 3 et ledit actionneur 11. Ce dernier est avantageusement constitué sous forme d'un vérin à vis.The positioning means 8 consists, according to the preferred embodiment according to the figure 1 , in a pivot axis 10 of the frame or movable door 3 secured directly with said frame or movable door 3 and in an actuator 11 of pivoting of the frame or movable door 3 via a linkage 12 mounted between the edge of the frame or mobile door 3 and said actuator 11. The latter is advantageously constituted in the form of a screw jack.

Ainsi, il est possible d'effectuer des pivotements de très faible amplitude du bâti ou porte mobile 3, de sorte que la tête d'étanchéité constituée par les rouleaux 5 et 6 est pivotée autour de son axe de pivotement 10 et induit un déplacement du tapis transporteur 2 en sens contraire de la dérive constatée.Thus, it is possible to perform pivoting of very small amplitude of the frame or movable door 3, so that the sealing head constituted by the rollers 5 and 6 is pivoted about its pivot axis 10 and induces a displacement of the conveyor belt 2 in the opposite direction of the observed drift.

Le moyen de contrôle de position 9 est constitué par au moins un capteur de position disposé près d'au moins un bord du tapis transporteur 2, à proximité des rouleaux horizontaux superposés 5 et 6 de la tête d'étanchéité, ce capteur étant un capteur analogique proportionnel relié à un moyen de calcul 13 délivrant un signal de correction à un servo-variateur 14 de commande d'un moteur 15 d'entraînement de l'actionneur 11 constitutif du moyen de positionnement 8 du bâti ou porte mobile 3.The position control means 9 is constituted by at least one position sensor disposed near at least one edge of the conveyor belt 2, near the superimposed horizontal rollers 5 and 6 of the sealing head, this sensor being a sensor proportional analogue connected to a calculation means 13 delivering a correction signal to a servo-drive 14 for controlling a drive motor 15 of the actuator 11 constituting the positioning means 8 of the frame or movable door 3.

De préférence, le capteur formant le moyen de contrôle de position 9 est un capteur optique s'étendant de part et d'autre d'une lisière du tapis transporteur 2. Cependant, il est également possible de réaliser le capteur formant le moyen de contrôle de position 9 sous forme d'un capteur pneumatique, à courant de foucauld ou à palpeur. Le fonctionnement de tels capteurs est connu de l'homme du métier et ne sera pas décrit en détail.Preferably, the sensor forming the position control means 9 is an optical sensor extending on either side of a selvedge of the conveyor belt 2. However, it is also possible to produce the sensor forming the control means. in the form of a pneumatic sensor, with a current of foucauld or with probe. The operation of such sensors is known to those skilled in the art and will not be described in detail.

Par ailleurs, le moyen de contrôle de position 9 peut être complété par un dispositif de sécurité consistant en des cellules de détection 16 s'étendant latéralement de part et d'autre du tapis transporteur 2 en amont ou en aval du capteur formant le moyen de contrôle de position 9, ces cellules de détection 16 pouvant être de même type que ce dernier.Furthermore, the position control means 9 may be completed by a security device consisting of detection cells 16 extending laterally on either side of the conveyor belt 2 upstream or downstream of the sensor forming the means of detection. position control 9, these detection cells 16 may be of the same type as the latter.

Conformément à une autre caractéristique de l'invention, les moyens de calcul 13 du moyen de positionnement 8 et du moyen de contrôle de position 9 équipant les têtes d'étanchéité des deux extrémités des machines de traitement thermique de fils sont avantageusement connectés entre eux et les moyens de positionnement 8 du bâti ou porte mobile 3 sont disposés de manière inverse de façon à réaliser un déplacement de direction identique pour les deux têtes d'étanchéité. En effet, lors de la détection d'une dérive du tapis transporteur à l'une ou à l'autre extrémité de la machine de traitement thermique de fils, il est nécessaire de redresser ledit tapis transporteur 2 de manière à le centrer parfaitement à l'intérieur de la machine de traitement de fils et la correction de déviation nécessaire à une extrémité doit automatiquement être reportée à l'autre extrémité, au moins en ce qui concerne la direction.According to another characteristic of the invention, the calculation means 13 of the positioning means 8 and the position control means 9 equipping the sealing heads of the two ends of the son heat treatment machines are advantageously connected to each other and the positioning means 8 of the frame or movable door 3 are arranged in a reverse manner so as to achieve the same direction of movement for the two sealing heads. Indeed, when detecting a drift of the conveyor belt at one or the other end of the son heat treatment machine, it is necessary to straighten said conveyor belt 2 so as to center it perfectly on the conveyor belt. The inside of the wire processing machine and the deflection correction required at one end should automatically be carried over to the other end, at least as far as the direction is concerned.

En fonctionnement de la machine de traitement thermique, le tapis 2 défile dans le sens longitudinal de la ligne de traitement passant dans ladite machine et, lorsque le tapis dévie de sa trajectoire vers la gauche ou vers la droite, sa déviation est mesurée à proximité de la tête d'étanchéité par le moyen de contrôle de position 9, qui transmet les données relevées au moyen de calcul 13. Dès lors qu'une dérive supérieure à une valeur maximale autorisée est constatée, le moyen de calcul 13 détermine une correction de déviation à réaliser et délivre un signal de commande correspondant au servo-variateur 14 de commande du moteur 15 d'actionnement du vérin à vis 11. Ce dernier entraîne alors la tringlerie 12 dans un mouvement de pivotement autour d'un axe 12' ayant pour effet de provoquer un pivotement correspondant du bâti ou porte mobile 3 autour de l'axe 10 et ainsi un déplacement angulaire correspondant de la tête d'étanchéité. Il s'ensuit que les rouleaux 5, 6 de cette dernière, qui enserrent le tapis transporteur 2, provoquent un rippage dudit tapis transporteur 2 correspondant au sens de pivotement de la tête d'étanchéité et du bâti ou porte mobile 3. Le tapis transporteur 2 est, de ce fait ramené dans une direction de défilement normale se situant dans les tolérances autorisées.In operation of the heat treatment machine, the belt 2 scrolls in the longitudinal direction of the treatment line passing through said machine and, when the belt deviates from its trajectory to the left or to the right, its deviation is measured close to the sealing head by the position control means 9, which transmits the data read by calculation means 13. As soon as a drift greater than a maximum authorized value is found, the calculation means 13 determines a deflection correction to realize and delivers a control signal corresponding to the drive servo-drive 14 of the actuating motor 15 of the screw jack 11. The latter then drives the linkage 12 in a pivoting movement about an axis 12 'having the effect to cause a corresponding pivoting of the frame or movable door 3 about the axis 10 and thus a corresponding angular displacement of the sealing head. It follows that the rollers 5, 6 of the latter, which enclose the conveyor belt 2, cause a ripping of said conveyor belt 2 corresponding to the pivoting direction of the sealing head and the frame or movable door 3. The conveyor belt 2 is, therefore, brought back in a normal scrolling direction within the allowed tolerances.

Selon une variante de réalisation de l'invention, représentée à la figure 2 des dessins annexés, l'actionneur de pivotement du bâti ou porte mobile 3 peut également agir directement sur ledit bâti ou porte mobile 3 et être constitué, à cet effet, par un secteur denté 17 solidarisé à une extrémité avec ledit bâti ou porte mobile 3 et par un pignon 18 engrenant avec ledit secteur denté 17 et entraîné par un moteur pas à pas 19 commandé par l'intermédiaire du servo-variateur 14. Dans un tel cas, les éléments de transmission du mouvement de pivotement au bâti ou porte mobile 3 sont limités à un minimum, ce qui a pour conséquence de réduire les risques d'incidents mécaniques, ainsi que les travaux de maintenance.According to an alternative embodiment of the invention, represented in FIG. figure 2 appended drawings, the pivot actuator of the frame or movable door 3 can also act directly on said frame or movable door 3 and be constituted, for this purpose, by a toothed sector 17 secured at one end with said frame or movable door 3 and by a pinion 18 meshing with said toothed sector 17 and driven by a stepping motor 19 controlled by means of the servo-variator 14. In such a case, the transmission elements of the pivoting movement to the frame or movable door 3 are limited to a minimum, which reduces the risk of mechanical incidents, as well as maintenance work.

Il est également possible, selon une autre variante de réalisation de l'invention, représentée à la figure 3 des dessins annexés, de constituer l'actionneur de pivotement du bâti ou porte mobile 3 sous forme d'un secteur denté 17 solidarisé à une extrémité avec ledit bâti ou porte mobile 3 et d'une crémaillère 20 engrenant avec ledit secteur denté 17 et entraînée par un vérin à vis 21, dont le moteur 22 est commandé par l'intermédiaire du servo-variateur 14. Ce mode de réalisation permet l'obtention de résultats et d'avantages comparables à ceux obtenus au moyen du dispositif suivant la figure 2.It is also possible, according to another embodiment of the invention, shown in FIG. figure 3 of the accompanying drawings, to constitute the pivoting actuator of the frame or movable door 3 in the form of a toothed sector 17 secured at one end to said frame or movable door 3 and a rack 20 meshing with said toothed sector 17 and driven by a screw jack 21, whose motor 22 is controlled via the servo-variator 14. This embodiment allows obtaining results and advantages comparable to those obtained by means of the device according to the figure 2 .

Conformément à une autre variante de réalisation de l'invention, et comme le montrent les figures 4 et 5 des dessins annexés, les moyens de positionnement 8 peuvent être réalisés directement par les rouleaux horizontaux 5, 6 des têtes d'étanchéité, au moins l'un de ces rouleaux pouvant être affecté à ses extrémités de pressions d'application sur le tapis transporteur 2 différentes, par commande individuelle d'actionneurs 23 de mise en pression des extrémités de ces rouleaux. Ainsi, il est possible, par une commande séparée et maîtrisée de la pression d'application des rouleaux 5, 6 contre le tapis transporteur 2, d'effectuer une pression plus forte à une extrémité des rouleaux, par exemple du côté gauche (figures 4 et 5), ce qui a pour effet de repousser le bord correspondant du tapis transporteur 2 vers l'extrémité des rouleaux subissant une moindre pression, à savoir vers la droite, suivant la flèche (figure 4), de sorte que la déviation constatée au préalable peut être rattrapée rapidement et aisément.According to another variant embodiment of the invention, and as shown by the Figures 4 and 5 In the accompanying drawings, the positioning means 8 can be made directly by the horizontal rollers 5, 6 of the sealing heads, at least one of these rollers being assignable at its application pressure ends on the conveyor belt 2. different, by individual control actuators 23 pressurizing the ends of these rollers. Thus, it is possible, by a separate and controlled control of the application pressure of the rollers 5, 6 against the conveyor belt 2, to make a stronger pressure at one end of the rollers, for example on the left side ( Figures 4 and 5 ), which has the effect of pushing the corresponding edge of the conveyor belt 2 toward the end of the rollers under a lower pressure, namely to the right, along the arrow ( figure 4 ), so that the deviation noted beforehand can be caught quickly and easily.

Il est également possible, selon une autre variante de réalisation de l'invention, représentée aux figures 6 et 7 des dessins annexés, de réaliser le dispositif de positionnement 7 sous forme d'un ensemble comportant un seul moyen de positionnement disposé à l'intérieur de l'enceinte 1 de la machine de traitement thermique de fils et des moyens de contrôle de position 9 agissant à proximité immédiate de chaque tête d'étanchéité. Dans un tel cas, le moyen de positionnement unique peut être réalisé sous forme de deux rouleaux 5', 6' disposés à l'intérieur de l'enceinte de traitement 1, sensiblement au milieu de celle-ci, et serrés de part et d'autre contre le tapis transporteur 2, à la manière des rouleaux horizontaux 5 et 6 des têtes d'étanchéité, le serrage des extrémités de ces rouleaux 5', 6' en direction du tapis transporteur 2 étant effectué indépendamment et de manière maîtrisée au moyen de vérins d'actionneurs 23'. Dans un tel mode de réalisation, qui correspond dans sa constitution à celui décrit précédemment à propos des têtes d'étanchéité selon les figures 4 et 5, le redressement du tapis transporteur 2 par rippage peut également être effectué par application d'une plus forte pression d'entraînement sur un bord du tapis transporteur, de sorte que celui-ci est automatiquement redressé en sens inverse. En effet, l'accroissement de la pression des rouleaux sur un bord du tapis transporteur provoque un effet d'entraînement accru dudit bord ou un effet de glissement relatif de l'autre bord, de sorte que le tapis transporteur 2 a naturellement tendance à subir une modification de son alignement.It is also possible, according to another variant embodiment of the invention, shown in FIGS. Figures 6 and 7 of the accompanying drawings, to produce the positioning device 7 in the form of an assembly comprising a single positioning means disposed inside the enclosure 1 of the heat treatment machine son and position control means 9 acting in the immediate vicinity of each sealing head. In such a case, the single positioning means can be made in the form of two rollers 5 ', 6' disposed inside the treatment chamber 1, substantially in the middle thereof, and clamped on both sides. against the conveyor belt 2, in the manner of the horizontal rollers 5 and 6 of the sealing heads, clamping the ends of these rollers 5 ', 6' towards the conveyor belt 2 is effected independently and in a controlled manner by means of of actuator cylinders 23 '. In such an embodiment, which corresponds in its constitution to that described above with respect to the sealing heads according to the Figures 4 and 5 , the recovery of the conveyor belt 2 by ripping can also be performed by applying a higher drive pressure on an edge of the conveyor belt, so that it is automatically rectified in the opposite direction. Indeed, increasing the pressure of the rollers on one edge of the conveyor belt causes an increased drive effect of said edge or a relative sliding effect of the other edge, so that the conveyor belt 2 naturally tends to undergo a modification of its alignment.

Une réalisation d'une machine de traitement thermique de fils selon les deux derniers modes de réalisation évoqués, permet de modifier considérablement la constitution même de la machine de traitement thermique, du fait que le bâti ou porte mobile 3 peut être remplacé par un dispositif fixe de fermeture des extrémités de l'enceinte de traitement, de constitution plus simple et ne nécessitant plus de soufflet de jonction avec ladite enceinte.An embodiment of a son heat treatment machine according to the last two embodiments mentioned, makes it possible to considerably modify the constitution of the heat treatment machine, because the frame or mobile door 3 can be replaced by a fixed device closure of the ends of the treatment chamber, of simpler constitution and no longer requiring junction bellows with said enclosure.

Grâce à l'invention, il est possible de maîtriser parfaitement la dérive d'un tapis transporteur, que ce dernier soit parfaitement neuf et redressé ou usé et présentant des déformations telles qu'une flèche ou des ondulations par une correction en continue de ladite dérive. Cette correction est avantageusement effectuée en réalisant des micro pivotements du bâti ou porte mobile 3, ce quelque soit la vitesse de défilement du tapis et éventuellement également lorsque ce dernier est soumis à des déplacements en marche arrière de relativement faible longueur.Thanks to the invention, it is possible to perfectly control the drift of a conveyor belt, that it is perfectly new and straightened or worn and having deformations such as an arrow or corrugations by a continuous correction of said drift . This correction is advantageously performed by performing micro pivoting of the frame or movable door 3, regardless of the speed of travel of the carpet and possibly also when the latter is subjected to backward movements of relatively short length.

Cette limitation des dérives est essentiellement due à la limitation, voire à la suppression de l'effet bras de levier du montage du bâti ou porte mobile 3. Par ailleurs, ce montage simplifié de ce bâti ou porte mobile 3 procure l'avantage d'une constitution plus simple de la machine.This limitation of the drifts is essentially due to the limitation, or even the elimination of the leverage effect of mounting the frame or mobile door 3. Moreover, this simplified assembly of this frame or mobile door 3 provides the advantage of a simpler constitution of the machine.

L'invention permet donc de positionner parfaitement, sur une portion déterminée de sa longueur, un tapis transporteur 2 de grande longueur, en défilement continu dans un plan. En effet, la correction de déviation du tapis transporteur 2 est effectuée sans changement de direction du tapis hors du plan au moyen de rouleaux de renvoi ou analogue, comme il est habituel de faire, par exemple pour le guidage de bandes en défilement.The invention therefore makes it possible to position perfectly, over a given portion of its length, a conveyor belt 2 of great length, in continuous movement in a plane. Indeed, the deflection correction of the conveyor belt 2 is performed without changing the direction of the carpet out of the plane by means of return rollers or the like, as is customary to do, for example for the guidance of moving strips.

Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté au dessin annexé. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.Of course, the invention is not limited to the embodiment described and shown in the accompanying drawing. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims (13)

  1. Device for positioning a conveyor belt moving in machines for thermally treating yarns, essentially comprising a pressurized chamber (1) traversed by a conveyor belt (2) and closed at each end by a sealing head mounted on a frame or movable door (3) connected to the pressurized chamber (1) by means of bellows (4), each sealing head comprising a pair of superposed horizontal rollers (5, 6), which are pressed against opposite surfaces of the conveyor belt (2), characterised in that it comprises positioning means (8) and position control means (9) acting on a very short zone immediately adjacent to each sealing head and moreover, characterised in that the position control means (9) consists of at least one position detecting means arranged close to at least one edge of the conveyor belt (2), close to superposed horizontal rollers (5 and 6) of the sealing head, said detector being a proportional analogue detector connected to computing means (13) delivering a correction signal to a servo-mechanism (14) for controlling a drive motor (15) of the actuator (11) which constitutes the positioning means (8) of the frame or movable door (3).
  2. Device according to claim 1, characterised in that the positioning means (8) consists of a pivoting axle (10) of the frame or movable door (3) secured directly to said frame or movable door (3), and an actuator (11) for pivoting said frame or movable door (3).
  3. Device according to claim 2, characterised in that the actuator (11) acts on the frame or movable door (3) by means of a linkage (12) mounted between the edge of the frame or movable door (3) and said actuator (11).
  4. Device according to claim 2, characterised in that the actuator (11) is in the form of a screw jack.
  5. Device according to claim 1, characterised in that the detector forming the position control means (9) is an optical detector extending on either side of an edge of the conveyor belt (2).
  6. Device according to claim 1, characterised in that the detector forming the position control means (9) is in the form of a pneumatic detector, an eddy current detector or a feeler.
  7. Device according to claim 1, characterised in that the position control means (9) is completed by a safety device consisting of detection cells (16) which extend laterally on either side of the conveyor belt (2) upstream or downstream of the detector forming the positioning control means (9), said detection cells (16) being of the same type as the latter.
  8. Device according to claim 1, characterised in that the computing means (13) of the positioning means (8) and of the position control means (9) equipping the sealing heads of the two ends of the machines for the thermal treatment of yarns are interconnected and the positioning means (8) of the frame or movable door (3) are arranged in an inverse manner so as to perform movement in an identical direction for the two sealing heads.
  9. Device according to claim 2, characterised in that the actuator for pivoting the frame or movable door (3) acts directly on said frame or movable door (3) and comprises a toothed sector (17) joined at one end to said frame or movable door (3) and by a pinion (18) engaging with said toothed sector (17) and driven by a stepping motor (19) controlled by means of a servo-mechanism (14).
  10. Device according to claim 2, characterised in that the actuator for pivoting the frame or movable door (3) acts directly on said frame or movable door (3) and comprises a toothed sector (17) joined at one end to said frame or movable door (3) and by a rack (20) engaging with said toothed sector (17) and driven by a screw jack (21), whose motor (22) is controlled by means of a servo-mechanism (14).
  11. Device according to claim 1, characterised in that the positioning means (8) of each sealing head is formed directly by the horizontal rollers (5, 6) of said sealing heads, at least one of these rollers being affected at its ends by different pressure applications on the conveyor belt (2) by the individual control of actuators (23) for pressing the ends of these rollers.
  12. Device according to claim 1, characterised in that the positioning device (7) is in the form of an assembly comprising a single positioning means arranged inside the chamber (1) of the thermal processing machine for yarns, and position control means (9) arranged immediately adjacent to each sealing head.
  13. Device according to claim 12, characterised in that the single positioning means (7) is in the form of two rollers (5', 6') arranged inside the treatment chamber (1), substantially in the middle of the latter, and gripped on either side against the conveyor belt (2), in the manner of horizontal rollers (5 and 6) of the sealing heads, the ends of these rollers (5', 6') being clamped independently in the direction of the conveyor belt (2) and in a controlled manner by actuators (23').
EP06301188.6A 2005-12-02 2006-11-29 Device for positioning a moving transport belt in a machine for the thermal treatment of yarns Active EP1793027B3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0553695A FR2894258B1 (en) 2005-12-02 2005-12-02 DEVICE FOR POSITIONING THE RUNNING CARRIER BELT IN THERMAL WIRE PROCESSING MACHINES

Publications (3)

Publication Number Publication Date
EP1793027A1 EP1793027A1 (en) 2007-06-06
EP1793027B1 EP1793027B1 (en) 2008-07-23
EP1793027B3 true EP1793027B3 (en) 2014-07-16

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EP06301188.6A Active EP1793027B3 (en) 2005-12-02 2006-11-29 Device for positioning a moving transport belt in a machine for the thermal treatment of yarns

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US (1) US8113255B2 (en)
EP (1) EP1793027B3 (en)
CN (1) CN1974911B (en)
DE (1) DE602006001924D1 (en)
FR (1) FR2894258B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2926823B1 (en) 2008-01-24 2010-06-11 Superba Sa DEVICE FOR POSITIONING THE RUNNING CARRIER BELT IN THERMAL WIRE PROCESSING MACHINES
CN102126629A (en) * 2010-12-28 2011-07-20 东莞大同数控机械有限公司 Obliquely shearing automatic forward feeding device
FR2974820B1 (en) * 2011-05-04 2014-10-24 Superba Sa ROLL FOR SEAL HEAD AND METHOD OF MANUFACTURE
CZ2018395A3 (en) * 2018-08-07 2020-02-19 Rieter Cz S.R.O. A method of controlling an annular spinning machine service apparatus and an annular spinning machine for carrying it out

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59163210A (en) * 1983-03-07 1984-09-14 Ricoh Co Ltd Width position controller for endless belt
FR2629106B1 (en) * 1988-03-25 1991-01-25 Superba Sa SEALING HEAD OF A CONTINUOUS STEAM TREATMENT ENCLOSURE OF TEXTILE THREADS
FR2652829B1 (en) * 1989-10-11 1992-02-07 Superba Sa SEALING HEAD FOR AN INPUT OR OUTPUT OF A TEXTILE YARN PROCESSING ENCLOSURE.
GB2410233A (en) * 2004-01-20 2005-07-27 Ace Conveyor Equip Correction of lateral conveyor belt movement
US20070044428A1 (en) * 2005-09-01 2007-03-01 Michel Mazoyer Sealing head for machines for heat treating threads

Also Published As

Publication number Publication date
FR2894258B1 (en) 2008-02-08
US20070128567A1 (en) 2007-06-07
DE602006001924D1 (en) 2008-09-04
CN1974911A (en) 2007-06-06
EP1793027B1 (en) 2008-07-23
EP1793027A1 (en) 2007-06-06
FR2894258A1 (en) 2007-06-08
US8113255B2 (en) 2012-02-14
CN1974911B (en) 2011-07-20

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