EP1451397B1 - Method and device for controlling a line of drawing rollers of a textile machine - Google Patents

Method and device for controlling a line of drawing rollers of a textile machine Download PDF

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Publication number
EP1451397B1
EP1451397B1 EP02802534A EP02802534A EP1451397B1 EP 1451397 B1 EP1451397 B1 EP 1451397B1 EP 02802534 A EP02802534 A EP 02802534A EP 02802534 A EP02802534 A EP 02802534A EP 1451397 B1 EP1451397 B1 EP 1451397B1
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EP
European Patent Office
Prior art keywords
roller
belt
driven
rotation
notched
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EP02802534A
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German (de)
French (fr)
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EP1451397A1 (en
Inventor
Jean-Louis Dumas
Gérard GAIRE
Jean-Baptiste Schaffhauser
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N Schlumberger SAS
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N Schlumberger SAS
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Publication of EP1451397A1 publication Critical patent/EP1451397A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control

Definitions

  • the present invention relates to the field of textile machines, especially stretching machines and finishers and relates to a method of controlling a stretching unit of a textile machine.
  • the invention also relates to a device for implementing this method.
  • machine-pulling units such as chain gills, intersecting screws, sun or hedgehog gills, and finishers, such as sleeve rubbers and pin benches, generally consist of a set of two corrugated metal cylinders, called draw rolls, against which is pressurized a cylinder covered with an elastic lining called a pressure cylinder.
  • the draw roll which is located in the immediate vicinity of the fiber control zone, has a smaller diameter than the adjacent draw roll, in order to minimize the distance between the drawing unit and the fiber control area.
  • Each drawing cylinder has at its end a pinion through which it receives its rotational movement.
  • Such a stretching unit is shown schematically, for example, in FR-A-1 456 485, in which the gears of each drawing roll are interconnected by an intermediate gear.
  • one of the pinions is a bell pinion inside which meshes the other pinion.
  • more recent embodiments provide for the installation of a lubricated housing containing an intermediate shaft with two gears, in order to connect the gears of the two drawing rolls.
  • This solution has the advantage of allowing greater speeds of rotation of the drawing rolls and thus to increase the production of textile machines. It has, on the other hand, the disadvantage of being expensive, of requiring a perfect seal and of causing a high temperature rise of the moving parts.
  • the elastic material of the pressure cylinder must necessarily compensate by its deformation these slight differences in speed, which leads to a heating of the moving parts, a pulsation may cause regularity defects on the ribbon or the wick produced by the textile machine, a premature wear of the pressure roll liners, overloading of the lubricated sump gearwheels, causing premature wear, overheating and increased operating noise, as well as overheating of the lubricating fluid and rapid wear of the seals sealing, which results in leakage of oil or fluid grease.
  • the object of the present invention is to overcome these drawbacks by proposing a new method of controlling a stretching unit of a textile machine and a device for implementing this process, making it possible to obtain lower manufacturing costs, and rapid disassembly and reassembly of the draw rolls.
  • the method of controlling a stretching unit of a textile machine comprising two drawing rolls and a pressure roll, which is pressurized against the two drawing rolls, and optionally a calender roll cooperating with a roll of pressure, is characterized in that it consists essentially in driving in rotation without slippage one of the drawing rolls and in driving in rotation by friction the other drawing roll.
  • the invention also relates to a device for implementing this method, in the form of a stretching unit comprising two drawing rolls and a pressure cylinder which is pressurized against the two drawing rolls, and optionally a calender roll cooperating with a pressure roll, characterized in that one of the drawing rolls is rotated by a toothed belt meshing on a pinion integral with the first drawing cylinder, and the other drawing cylinder is rotated by a friction device.
  • the method of controlling a drawing unit of a textile machine comprising two drawing rolls 1 and 2 mounted on bearings 6 and a pressure roll 3, which is pressurized against the two drawing rolls 1 and 2, and optionally a calender roll 16 cooperating with a pressure roll 18, essentially consists in driving in rotation without sliding one of the drawing rolls 1 and rotating in rotation by friction the other drawing cylinder 2.
  • This method is implemented by a device in the form of a stretching unit comprising two drawing rolls 1 and 2, mounted on bearings 6, and a pressure cylinder 3 lined with an elastic coating, which is pressurized against two draw rolls 1 and 2, and optionally a calender roll 16 cooperating with a pressure roll 18.
  • the first drawing roll 1 has a smaller diameter than the second drawing roll 2, so that the distance separating the control zone 4 from the fibers and the nip of the fibers, constituted by the contact zone of the pressing roll 3 against the drawing roll 1, the lowest possible.
  • the draw rolls 1 and 2 are helically splined and are mounted on bearings 5 (FIG. 5) inside integral bearings 6. of the machine frame.
  • the first drawing cylinder 1 has at one of its ends, a notched pinion 7 rotated by means of a toothed belt 8, itself driven by a notched pinion 9 rotated by a motor 10, by the intermediate of a kinematic chain (not shown).
  • one of the drawing rolls 1 is rotated by a toothed belt 8, meshing with a pinion 7 integral with this first drawing roll 1, and the other drawing roll 2 is rotated by a device friction.
  • the friction device is in the form of a non-toothed belt 12 rotating in a smooth pulley 11 secured to the second 2.
  • a non-toothed belt 12 with a smooth pulley 11 is not perfectly positive, slight slippage of one on the other are allowed and absorbed by the belt. not notched 12 and not by the lining of the pressure cylinder 3.
  • the dimensions and characteristics of the non-toothed belt 12 and the pulley 11 are determined in such a way that the drawing cylinder or cylinders 2 are driven almost positively, that is that is, as soon as there is a peripheral speed difference of one of the drawing rolls 1 relative to the other 2 or to the pressure roll 3, this is the belt 12 itself sliding on its pulley 11 and absorbs the difference in speed and not the lining of the pressure cylinder 3.
  • the second drawing cylinder 2 has at one of its ends a preferably smooth pulley 11 and convex rim, rotated by means of a non-toothed belt, preferably a flat belt 12 itself driven by an intermediate pulley 13 mounted on an intermediate axis 14. On the same intermediate axis 14 is mounted an intermediate toothed pinion 15 driven in rotation by the toothed belt 8.
  • the motor 10 positively drives the first drawing roll 1 without any slippage, whereas the second drawing roll 2 is driven by the friction device consisting of the smooth pulleys 11 and 13 and the notched belt 12.
  • the friction device acts as soon as a slight peripheral speed difference tends to appear between the pressure roll 3 and the second drawing cylinder 2 allowing the non-toothed belt 12 to slide on one of the smooth pulleys 11 or 13.
  • the non-toothed belt 12 absorbs the sliding energy caused by slight differences in speed of a member relative to the other, the coating of the pressure cylinder 3 is then preserved.
  • Figure 4 of the accompanying drawings is a side elevational view of a drawing group according to the invention.
  • the tension of the non-toothed belt 12 is adjustable by changing the distance between the axes of the smooth pulleys 11 and 13.
  • the smooth pulley 13 is integral with the axis 14 mounted on a bearing inside a bearing Articulated about a hinge axis 21.
  • the hinged bearing 20 can oscillate about the hinge axis 21 and move relative to the frame of the machine, so as to change the distance between the axes of the hinge.
  • a locking means 22, such as a screw and nut assembly, allows the bearing 20 to maintain a stable position relative to the machine frame.
  • the tension of the toothed belt 8 is also adjustable by means of a tensioner 23 whose position is modifiable relative to the frame of the machine. To ensure correct operation of the friction device, the tension of the non-toothed belt 12 is first adjusted, then the tension of the toothed belt 8 is adjusted.
  • the non-toothed belt 12 can also be driven directly via the calender roll 16, the intermediate pulley 13 then being mounted on the axis of the latter and the tension of said non-toothed belt 12 being provided by means of a tensioner roller located on the path of said belt.
  • the bearing 20, the hinge 21 and the locking means 22 are removed.
  • the friction device may consist of the contact between the pressure cylinder 3 and the drawing rolls 1 and 2 (FIG. 3).
  • the first drawing roll 1 is rotated without slipping by means of a toothed belt 8 and a notched pinion 7 integral with the drawing roll 1.
  • the toothed belt 8 cooperates with the notched pinion 9, as indicated above.
  • the first drawing cylinder 1 transmits, by surface contact, its rotational movement to the cylinder of pressure 3.
  • the latter then transmits the rotational movement, also by surface contact, to the second drawing roll 2.
  • the second drawing roll 2 acquires the same peripheral speed as that of the pressure roll 3.
  • At least one of the cylinders constituting the drawing group is mounted on bearings 6 with removable caps, to facilitate disassembly and reassembly of said drawing cylinder.
  • each bearing 6 consists of a support 24a integral with the frame of the machine and a removable cap 24b.
  • the support 24a and the removable cap 24b each have a semi-cylindrical bearing surface adjusted to the outside diameter of the bearing 5.
  • the textile machine when the textile machine is equipped with a calender roll 16 cooperating with a pressure roll 18, the toothed belt 8 meshes, in addition, with a notched pinion 17 mounted at one end of said calender roll 16.
  • a calender roll 16 which is helically grooved, is mounted on bearings inside bearings integral with the frame of the machine, in the same way as the drawing rolls 1 and 2.
  • the pressure roll 18, which is pressurized against the calender roll 16, acquires the same peripheral speed as that of the calender roll 16.
  • calender cylinder 16 relative to that of the drawing group. Indeed, in some cases, the textile material must be more or less stretched, or even sometimes relaxed between the drawing group and the calender roll.
  • the tension that is to say the peripheral speed ratio of the calender cylinder relative to the drawing group, is modifiable by changing the toothed pinion 17.
  • the accuracy of this adjustment depends on the number of teeth of the pinion 17.
  • the calender roll 16 when the textile machine is equipped with a calender roll 16 cooperating with a pressure roll 18, the calender roll 16 can be driven by friction, by providing at one of its ends a smooth pulley 19 driven in rotation by the non-toothed belt 12.
  • the tension that is to say the peripheral speed ratio of the calender roll 16 relative to the stretcher group, is also modifiable by changing the smooth pulley 19.
  • the accuracy of this setting is finer, because it depends on the diameter of the smooth pulley 19 and not an integer number of teeth.
  • the toothed belt 8 when the textile machine does not have a calender roll, the toothed belt 8 cooperates with a notched pinion 17 rotatably mounted in a bearing on the frame of the machine, in eccentric position relative to a straight line connecting the axes of the smooth pulleys 11 and 13.
  • the toothed belt 8 is forced to make a detour identical to that it would perform if the machine was equipped with a calender roll.
  • the invention it is possible to make a new manufacturing stretching unit that is less expensive than the groups that currently exist.
  • a group no longer requires maintenance and is no longer subject to lubricant leakage.
  • the lining of the pressure rollers are formed and said drawing group no longer generates pulsations of said linings, pulsations that were sometimes responsible for textile defects on ribbons or strands.
  • the moving members of the stretching unit in accordance with the invention thus achieve a maximum temperature in operation that is much lower than that of the known devices. previously.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Looms (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Description

La présente invention concerne le domaine des machines textiles, notamment les machines d'étirage et les finisseurs et a pour objet un procédé de commande d'un groupe étireur d'une machine textile. L'invention a également pour objet un dispositif pour la mise en oeuvre de ce procédé.The present invention relates to the field of textile machines, especially stretching machines and finishers and relates to a method of controlling a stretching unit of a textile machine. The invention also relates to a device for implementing this method.

Actuellement, les groupes étireurs des machines, telles que les gills à chaînes, les intersecting à vis, les gills soleil ou à hérisson et les finisseurs, tels que les frotteurs à manchons et les bancs à broches, sont généralement constitués par un ensemble de deux cylindres métalliques cannelés appelés cylindres étireurs, contre lesquels est mis en pression un cylindre recouvert d'une garniture élastique appelé cylindre de pression.Currently, machine-pulling units, such as chain gills, intersecting screws, sun or hedgehog gills, and finishers, such as sleeve rubbers and pin benches, generally consist of a set of two corrugated metal cylinders, called draw rolls, against which is pressurized a cylinder covered with an elastic lining called a pressure cylinder.

Le cylindre étireur, qui est situé à proximité immédiate de la zone de contrôle des fibres, a un diamètre inférieur par rapport au cylindre étireur voisin, afin de réduire au minimum la distance séparant le groupe étireur de la zone de contrôle des fibres. Chaque cylindre étireur présente à son extrémité un pignon par l'intermédiaire duquel il reçoit son mouvement de rotation.The draw roll, which is located in the immediate vicinity of the fiber control zone, has a smaller diameter than the adjacent draw roll, in order to minimize the distance between the drawing unit and the fiber control area. Each drawing cylinder has at its end a pinion through which it receives its rotational movement.

Un tel groupe étireur, dont la réalisation est connue depuis fort longtemps, est schématisé, par exemple, dans FR-A-1 456 485, dans lequel les pignons de chaque cylindre étireur sont reliés entre eux par un pignon intermédiaire.Such a stretching unit, the realization of which has been known for a long time, is shown schematically, for example, in FR-A-1 456 485, in which the gears of each drawing roll are interconnected by an intermediate gear.

Il existe également des modes de réalisation selon lesquels l'un des pignons est un pignon cloche à l'intérieur duquel engrène l'autre pignon.There are also embodiments in which one of the pinions is a bell pinion inside which meshes the other pinion.

Par ailleurs, des réalisations plus récentes prévoient l'installation d'un carter lubrifié contenant un arbre intermédiaire à deux pignons, afin de relier les pignons des deux cylindres étireurs. Cette solution présente l'avantage d'autoriser de plus grandes vitesses de rotation des cylindres étireurs et donc d'augmenter la production des machines textiles. Elle a, par contre, l'inconvénient d'être chère, de nécessiter une parfaite étanchéité et d'entraîner un échauffement élevé des organes en mouvement.In addition, more recent embodiments provide for the installation of a lubricated housing containing an intermediate shaft with two gears, in order to connect the gears of the two drawing rolls. This solution has the advantage of allowing greater speeds of rotation of the drawing rolls and thus to increase the production of textile machines. It has, on the other hand, the disadvantage of being expensive, of requiring a perfect seal and of causing a high temperature rise of the moving parts.

En outre, dans les dispositifs connus d'entraînement en rotation des cylindres étireurs, on cherche à imposer à chacun des cylindres étireurs une même vitesse périphérique, de telle manière que le cylindre de pression qui est mis en contact avec les deux cylindres étireurs acquière également cette même vitesse périphérique. Or, il est impossible d'y parvenir parfaitement, étant donné la déformation non contrôlable du matériau élastique recouvrant le cylindre de pression. Ainsi, par exemple, de très légères différences de diamètre d'un cylindre étireur, qui sont inévitables compte tenu de la précision d'usinage et des tolérances mécaniques acceptables, engendrent de très légères différences de vitesse périphérique d'un cylindre étireur par rapport à l'autre.In addition, in known rotary drive devices the drawing rolls, it is sought to impose on each of the drawing rollers the same peripheral speed, such that the pressure roll which is brought into contact with the two drawing rollers also acquires the same peripheral speed. However, it is impossible to achieve it perfectly, given the uncontrollable deformation of the elastic material covering the pressure cylinder. Thus, for example, very slight differences in the diameter of a drawing roll, which are inevitable in view of the machining precision and the acceptable mechanical tolerances, give rise to very slight differences in the peripheral speed of a drawing roll with respect to the other.

Le matériau élastique du cylindre de pression doit nécessairement compenser par sa déformation ces légères différences de vitesse, ce qui entraîne un échauffement des organes en mouvement, une pulsation pouvant provoquer des défauts de régularité sur le ruban ou la mèche produite par la machine textile, une usure prématurée des garnitures des cylindres de pression, une surcharge des pignons de commande du carter lubrifié, provoquant leur usure prématurée, un échauffement et une augmentation du bruit de fonctionnement, ainsi qu'un échauffement du liquide de lubrification et une usure rapide des joints d'étanchéité, qui a pour conséquence des fuites d'huile ou de graisse fluide.The elastic material of the pressure cylinder must necessarily compensate by its deformation these slight differences in speed, which leads to a heating of the moving parts, a pulsation may cause regularity defects on the ribbon or the wick produced by the textile machine, a premature wear of the pressure roll liners, overloading of the lubricated sump gearwheels, causing premature wear, overheating and increased operating noise, as well as overheating of the lubricating fluid and rapid wear of the seals sealing, which results in leakage of oil or fluid grease.

De plus, actuellement, l'opération de remplacement d'un cylindre étireur usé ou déformé nécessite le démontage du carter lubrifié ce qui est une opération longue et coûteuse.In addition, currently, the operation of replacing a worn or deformed drawing cylinder requires disassembly of the lubricated housing which is a long and expensive operation.

La présente invention a pour but de pallier ces inconvénients en proposant un nouveau procédé de commande d'un groupe étireur d'une machine textile et un dispositif pour la mise en oeuvre de ce procédé, permettant l'obtention de coûts de fabrication moindres, et des démontage et remontage rapides des cylindres étireurs.The object of the present invention is to overcome these drawbacks by proposing a new method of controlling a stretching unit of a textile machine and a device for implementing this process, making it possible to obtain lower manufacturing costs, and rapid disassembly and reassembly of the draw rolls.

A cet effet, le procédé de commande d'un groupe étireur d'une machine textile, comportant deux cylindres étireurs et un cylindre de pression, qui est mis en pression contre les deux cylindres étireurs, et éventuellement un cylindre calandreur coopérant avec un cylindre de pression, est caractérisé en ce qu'il consiste essentiellement à entraîner en rotation sans glissement l'un des cylindres étireurs et à entraîner en rotation par friction l'autre cylindre étireur.For this purpose, the method of controlling a stretching unit of a textile machine, comprising two drawing rolls and a pressure roll, which is pressurized against the two drawing rolls, and optionally a calender roll cooperating with a roll of pressure, is characterized in that it consists essentially in driving in rotation without slippage one of the drawing rolls and in driving in rotation by friction the other drawing roll.

L'invention a également pour objet un dispositif pour la mise en oeuvre de ce procédé, sous forme d'un groupe étireur comportant deux cylindres étireurs et un cylindre de pression qui est mis en pression contre les deux cylindres étireurs, et éventuellement un cylindre calandreur coopérant avec un cylindre de pression, caractérisé en ce que l'un des cylindres étireurs est entraîné en rotation par une courroie crantée engrenant sur un pignon solidaire de ce premier cylindre étireur, et l'autre cylindre étireur est entraîné en rotation par un dispositif à friction.The invention also relates to a device for implementing this method, in the form of a stretching unit comprising two drawing rolls and a pressure cylinder which is pressurized against the two drawing rolls, and optionally a calender roll cooperating with a pressure roll, characterized in that one of the drawing rolls is rotated by a toothed belt meshing on a pinion integral with the first drawing cylinder, and the other drawing cylinder is rotated by a friction device.

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 :

  • les figures 1 à 3 sont des vues en plan représentant les chaînes cinématiques de trois variantes de réalisation d'un groupe étireur conforme à l' invention ;
  • la figure 4 est une vue en élévation latérale d'un groupe étireur conforme à l'invention, et
  • la figure 5 est une représentation du montage d'un cylindre étireur conforme à 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:
  • Figures 1 to 3 are plan views showing the kinematic chains of three embodiments of a drawing group according to the invention;
  • FIG. 4 is a side elevational view of a drawing unit according to the invention, and
  • Figure 5 is a representation of the mounting of a drawing cylinder according to the invention.

Conformément à l'invention, et comme le montrent les figures 1 à 5 des dessins annexés, le procédé de commande d'un groupe étireur d'une machine textile comportant deux cylindres étireurs 1 et 2 montés sur des paliers 6 et un cylindre de pression 3, qui est mis en pression contre les deux cylindres étireurs 1 et 2, et éventuellement un cylindre calandreur 16 coopérant avec un cylindre de pression 18, consiste essentiellement à entraîner en rotation sans glissement l'un des cylindres étireurs 1 et à entraîner en rotation par friction l'autre cylindre étireur 2.According to the invention, and as shown in FIGS. 1 to 5 of the accompanying drawings, the method of controlling a drawing unit of a textile machine comprising two drawing rolls 1 and 2 mounted on bearings 6 and a pressure roll 3, which is pressurized against the two drawing rolls 1 and 2, and optionally a calender roll 16 cooperating with a pressure roll 18, essentially consists in driving in rotation without sliding one of the drawing rolls 1 and rotating in rotation by friction the other drawing cylinder 2.

Ce procédé est mis en oeuvre par un dispositif sous forme d'un groupe étireur comportant deux cylindres étireurs 1 et 2, montés sur des paliers 6, et un cylindre de pression 3 garni d'un revêtement élastique, qui est mis en pression contre les deux cylindres étireurs 1 et 2, et éventuellement un cylindre calandreur 16 coopérant avec un cylindre de pression 18.This method is implemented by a device in the form of a stretching unit comprising two drawing rolls 1 and 2, mounted on bearings 6, and a pressure cylinder 3 lined with an elastic coating, which is pressurized against two draw rolls 1 and 2, and optionally a calender roll 16 cooperating with a pressure roll 18.

Le premier cylindre étireur 1 présente un diamètre inférieur au second cylindre étireur 2, afin que la distance séparant la zone de contrôle 4 des fibres et la ligne de pinçage des fibres, constituée par la zone de contact du cylindre de pression 3 contre le cylindre étireur 1, soit la plus faible possible. Les cylindres étireurs 1 et 2 sont cannelés hélicoïdalement et sont montés sur des roulements 5 (figure 5) à l'intérieur de paliers 6 solidaires du bâti de la machine.The first drawing roll 1 has a smaller diameter than the second drawing roll 2, so that the distance separating the control zone 4 from the fibers and the nip of the fibers, constituted by the contact zone of the pressing roll 3 against the drawing roll 1, the lowest possible. The draw rolls 1 and 2 are helically splined and are mounted on bearings 5 (FIG. 5) inside integral bearings 6. of the machine frame.

Le premier cylindre étireur 1 présente à une de ses extrémités, un pignon cranté 7 mis en rotation par l'intermédiaire d'une courroie crantée 8, elle-même entraînée par un pignon cranté 9 entraîné en rotation par un moteur 10, par l'intermédiaire d'une chaîne cinématique (non représentée).The first drawing cylinder 1 has at one of its ends, a notched pinion 7 rotated by means of a toothed belt 8, itself driven by a notched pinion 9 rotated by a motor 10, by the intermediate of a kinematic chain (not shown).

Conformément à l'invention, l'un des cylindres étireurs 1 est entraîné en rotation par une courroie crantée 8, engrenant sur un pignon 7 solidaire de ce premier cylindre étireur 1, et l'autre cylindre étireur 2 est entraîné en rotation par un dispositif à friction.According to the invention, one of the drawing rolls 1 is rotated by a toothed belt 8, meshing with a pinion 7 integral with this first drawing roll 1, and the other drawing roll 2 is rotated by a device friction.

Selon un premier mode de réalisation de l'invention et comme le montrent les figures 1, 2 et 4 des dessins annexés, le dispositif à friction se présente sous forme d' une courroie non crantée 12 entraînant en rotation une poulie lisse 11 solidaire du second cylindre étireur 2. Ainsi, comme l'entraînement réalisé par coopération d'une courroie non crantée 12 avec une poulie lisse 11 n'est pas parfaitement positif, de légers glissements de l'un sur l'autre sont autorisés et absorbés par la courroie non crantée 12 et non par la garniture du cylindre de pression 3. Les dimensions et les caractéristiques de la courroie non crantée 12 et de la poulie 11 sont déterminées de telle manière que le ou les cylindres étireurs 2 soient entraînés presque positivement, c'est-à-dire de sorte que, dès qu'il y a une différence de vitesse périphérique de l'un des cylindres étireurs 1 par rapport à l'autre 2 ou par rapport au cylindre de pression 3, ce soit la courroie 12 elle-même qui glisse sur sa poulie 11 et absorbe la différence de vitesse et non pas la garniture du cylindre de pression 3.According to a first embodiment of the invention and as shown in Figures 1, 2 and 4 of the accompanying drawings, the friction device is in the form of a non-toothed belt 12 rotating in a smooth pulley 11 secured to the second 2. Thus, as the drive carried out by cooperation of a non-toothed belt 12 with a smooth pulley 11 is not perfectly positive, slight slippage of one on the other are allowed and absorbed by the belt. not notched 12 and not by the lining of the pressure cylinder 3. The dimensions and characteristics of the non-toothed belt 12 and the pulley 11 are determined in such a way that the drawing cylinder or cylinders 2 are driven almost positively, that is that is, as soon as there is a peripheral speed difference of one of the drawing rolls 1 relative to the other 2 or to the pressure roll 3, this is the belt 12 itself sliding on its pulley 11 and absorbs the difference in speed and not the lining of the pressure cylinder 3.

Le second cylindre étireur 2 présente à une de ses extrémités une poulie de préférence lisse 11 et à jante bombée, mise en rotation par l'intermédiaire d'une courroie non crantée, de préférence une courroie plate 12 elle-même entraînée par une poulie intermédiaire 13 montée sur un axe intermédiaire 14. Sur ce même axe intermédiaire 14 est monté un pignon cranté intermédiaire 15 entraîné en rotation par la courroie crantée 8.The second drawing cylinder 2 has at one of its ends a preferably smooth pulley 11 and convex rim, rotated by means of a non-toothed belt, preferably a flat belt 12 itself driven by an intermediate pulley 13 mounted on an intermediate axis 14. On the same intermediate axis 14 is mounted an intermediate toothed pinion 15 driven in rotation by the toothed belt 8.

Ainsi le moteur 10 entraîne positivement et sans glissement possible le premier cylindre étireur 1, alors que le second cylindre étireur 2 est entraîné par le dispositif à friction qui est constitué par les poulies lisses 11 et 13 et la courroie non crantée 12.Thus, the motor 10 positively drives the first drawing roll 1 without any slippage, whereas the second drawing roll 2 is driven by the friction device consisting of the smooth pulleys 11 and 13 and the notched belt 12.

Le dispositif à friction agit dès qu'une légère différence de vitesse périphérique tend à apparaître entre le cylindre de pression 3 et le second cylindre étireur 2 en permettant à la courroie non crantée 12 de glisser sur l'une des poulies lisses 11 ou 13. Il en résulte que la courroie non crantée 12 absorbe l'énergie de glissement provoquée par de légères différences de vitesse d'un organe par rapport à l'autre, le revêtement du cylindre de pression 3 étant alors préservé.The friction device acts as soon as a slight peripheral speed difference tends to appear between the pressure roll 3 and the second drawing cylinder 2 allowing the non-toothed belt 12 to slide on one of the smooth pulleys 11 or 13. As a result, the non-toothed belt 12 absorbs the sliding energy caused by slight differences in speed of a member relative to the other, the coating of the pressure cylinder 3 is then preserved.

La figure 4 des dessins annexés est une vue en élévation latérale d'un groupe étireur conforme à l'invention.Figure 4 of the accompanying drawings is a side elevational view of a drawing group according to the invention.

La tension de la courroie non crantée 12 est réglable par modification de la distance entre axes des poulies lisses 11 et 13. A cet effet, la poulie lisse 13 est solidaire de l'axe 14 monté sur roulement à l'intérieur d'un palier 20 articulé autour d'un axe d'articulation 21. Ainsi, le palier articulé 20 peut osciller autour de l'axe d'articulation 21 et se déplacer par rapport au bâti de la machine, de manière à modifier la distance entre axes de la poulie lisse 13 par rapport à la poulie lisse 11. Un moyen de verrouillage 22, tel qu'un ensemble à vis et écrou, permet au palier 20 de garder une position stable par rapport au bâti de la machine.The tension of the non-toothed belt 12 is adjustable by changing the distance between the axes of the smooth pulleys 11 and 13. For this purpose, the smooth pulley 13 is integral with the axis 14 mounted on a bearing inside a bearing Articulated about a hinge axis 21. Thus, the hinged bearing 20 can oscillate about the hinge axis 21 and move relative to the frame of the machine, so as to change the distance between the axes of the hinge. Smooth pulley 13 relative to the smooth pulley 11. A locking means 22, such as a screw and nut assembly, allows the bearing 20 to maintain a stable position relative to the machine frame.

La tension de la courroie crantée 8 est également réglable au moyen d'un tendeur 23, dont la position est modifiable par rapport au bâti de la machine. Pour assurer un fonctionnement correct du dispositif à friction, on commence par régler la tension de la courroie non crantée 12, puis on règle la tension de la courroie crantée 8.The tension of the toothed belt 8 is also adjustable by means of a tensioner 23 whose position is modifiable relative to the frame of the machine. To ensure correct operation of the friction device, the tension of the non-toothed belt 12 is first adjusted, then the tension of the toothed belt 8 is adjusted.

Selon une autre variante de réalisation de l'invention, non représentée aux dessins annexés, la courroie non crantée 12 peut également être entraînée directement par l'intermédiaire du cylindre calandreur 16, la poulie intermédiaire 13 étant alors montée sur l'axe de ce dernier et la tension de ladite courroie non crantée 12 étant assurée par l'intermédiaire d'un galet tendeur situé sur le parcours de ladite courroie. Dans un tel mode de réalisation, le palier 20, l'articulation 21 et le moyen de verrouillage 22 sont supprimés.According to another embodiment of the invention, not shown in the accompanying drawings, the non-toothed belt 12 can also be driven directly via the calender roll 16, the intermediate pulley 13 then being mounted on the axis of the latter and the tension of said non-toothed belt 12 being provided by means of a tensioner roller located on the path of said belt. In such an embodiment, the bearing 20, the hinge 21 and the locking means 22 are removed.

Conformément à une autre variante de réalisation de l'invention, le dispositif à friction peut être constitué par le contact entre le cylindre de pression 3 et les cylindres étireurs 1 et 2 (figure 3).According to another embodiment of the invention, the friction device may consist of the contact between the pressure cylinder 3 and the drawing rolls 1 and 2 (FIG. 3).

Dans ce cas, le premier cylindre étireur 1 est mis en rotation sans glissement par l'intermédiaire d'une courroie crantée 8 et d'un pignon cranté 7 solidaire du cylindre étireur 1. La courroie crantée 8 coopère avec le pignon cranté 9, comme indiqué plus haut. Le premier cylindre étireur 1 transmet, par contact de surface, son mouvement de rotation au cylindre de pression 3. Ce dernier transmet alors le mouvement de rotation, également par contact de surface, au second cylindre étireur 2. Ainsi, le second cylindre étireur 2 acquière la même vitesse périphérique que celle du cylindre de pression 3.In this case, the first drawing roll 1 is rotated without slipping by means of a toothed belt 8 and a notched pinion 7 integral with the drawing roll 1. The toothed belt 8 cooperates with the notched pinion 9, as indicated above. The first drawing cylinder 1 transmits, by surface contact, its rotational movement to the cylinder of pressure 3. The latter then transmits the rotational movement, also by surface contact, to the second drawing roll 2. Thus, the second drawing roll 2 acquires the same peripheral speed as that of the pressure roll 3.

Selon une autre caractéristique de l'invention et comme le montre la figure 5 des dessins annexés, au moins un des cylindres composant le groupe étireur est monté sur des paliers 6 à chapeaux amovibles, afin de faciliter le démontage et le remontage dudit cylindre étireur.According to another characteristic of the invention and as shown in Figure 5 of the accompanying drawings, at least one of the cylinders constituting the drawing group is mounted on bearings 6 with removable caps, to facilitate disassembly and reassembly of said drawing cylinder.

A cet effet, selon une autre caractéristique de l'invention, chaque palier 6 se compose d'un support 24a solidaire du bâti de la machine et d'un chapeau amovible 24b. Le support 24a et le chapeau amovible 24b présentent chacun une portée semi-cylindrique de roulement ajustée au diamètre extérieur du roulement 5. Ainsi, il devient possible de démonter et remonter rapidement et facilement les cylindres étireurs 1 et 2, lorsqu'ils sont usés ou déformés, sans avoir à les retirer axialement.For this purpose, according to another characteristic of the invention, each bearing 6 consists of a support 24a integral with the frame of the machine and a removable cap 24b. The support 24a and the removable cap 24b each have a semi-cylindrical bearing surface adjusted to the outside diameter of the bearing 5. Thus, it becomes possible to remove and remount quickly and easily the draw rolls 1 and 2, when worn or deformed, without having to remove them axially.

En effet, dans l'état actuel de la technique, étant donné l'existence de carters lubrifiés, il est nécessaire de retirer axialement les cylindres étireurs de leurs paliers après avoir démonté lesdits carters lubrifiés. Cette opération longue et fastidieuse est indispensable lorsque les cylindres étireurs sont usés ou tordus.Indeed, in the current state of the art, given the existence of lubricated housings, it is necessary to remove the drawing cylinders axially from their bearings after removing said lubricated casings. This long and tedious operation is essential when the draw rolls are worn or twisted.

Lorsque le chapeau amovible 24b est désolidarisé de son support 24a, le retrait radial du cylindre étireur 1 ou 2 avec les roulements 5 correspondants devient possible. L'intervention de remplacement de cylindres étireurs s'en trouve facilitée et les temps d'arrêt machine sont réduits.When the removable cap 24b is disengaged from its support 24a, the radial withdrawal of the drawing roller 1 or 2 with the corresponding bearings 5 becomes possible. The intervention of replacing drawing rolls is facilitated and machine downtimes are reduced.

Selon une autre caractéristique de l'invention, lorsque la machine textile est équipée d'un cylindre calandreur 16 coopérant avec un cylindre de pression 18, la courroie crantée 8 engrène, en outre, avec un pignon cranté 17 monté à une extrémité dudit cylindre calandreur 16. Un tel cylindre calandreur 16, qui est cannelé hélicoïdalement, est monté sur des roulements à l'intérieur de paliers solidaires du bâti de la machine, de la même manière que les cylindres étireurs 1 et 2. Le cylindre de pression 18, qui est mis en pression contre le cylindre calandreur 16, acquière la même vitesse périphérique que celle du cylindre calandreur 16.According to another characteristic of the invention, when the textile machine is equipped with a calender roll 16 cooperating with a pressure roll 18, the toothed belt 8 meshes, in addition, with a notched pinion 17 mounted at one end of said calender roll 16. Such a calender roll 16, which is helically grooved, is mounted on bearings inside bearings integral with the frame of the machine, in the same way as the drawing rolls 1 and 2. The pressure roll 18, which is pressurized against the calender roll 16, acquires the same peripheral speed as that of the calender roll 16.

En fonction de la qualité de la matière textile que la machine doit travailler, il est nécessaire de pouvoir ajuster la vitesse périphérique du cylindre calandreur 16 par rapport à celle du groupe étireur. En effet, dans certains cas, la matière textile doit être plus ou moins tendue, voire parfois même détendue entre le groupe étireur et le cylindre calandreur.Depending on the quality of the textile material that the machine has to work, it is necessary to be able to adjust the peripheral speed of the machine. calender cylinder 16 relative to that of the drawing group. Indeed, in some cases, the textile material must be more or less stretched, or even sometimes relaxed between the drawing group and the calender roll.

Aussi, la tension, c'est-à-dire le rapport de vitesse périphérique du cylindre calandreur par rapport au groupe étireur, est modifiable par changement du pignon cranté 17. La précision de ce réglage dépend du nombre de dents du pignon 17.Also, the tension, that is to say the peripheral speed ratio of the calender cylinder relative to the drawing group, is modifiable by changing the toothed pinion 17. The accuracy of this adjustment depends on the number of teeth of the pinion 17.

Selon une autre caractéristique de l'invention et comme le montre la figure 2 des dessins annexés, lorsque la machine textile est équipée d'un cylindre calandreur 16 coopérant avec un cylindre de pression 18, le cylindre calandreur 16 peut être entraîné par friction, par prévision à l'une de ses extrémités d'une poulie lisse 19 entraînée en rotation par la courroie non crantée 12. Dans ce cas, la tension, c'est-à-dire le rapport de vitesse périphérique du cylindre calandreur 16 par rapport au groupe étireur, est également modifiable par changement de la poulie lisse 19. La précision de ce réglage est plus fine, car elle dépend du diamètre de la poulie lisse 19 et non d'un nombre entier de dents.According to another characteristic of the invention and as shown in FIG. 2 of the appended drawings, when the textile machine is equipped with a calender roll 16 cooperating with a pressure roll 18, the calender roll 16 can be driven by friction, by providing at one of its ends a smooth pulley 19 driven in rotation by the non-toothed belt 12. In this case, the tension, that is to say the peripheral speed ratio of the calender roll 16 relative to the stretcher group, is also modifiable by changing the smooth pulley 19. The accuracy of this setting is finer, because it depends on the diameter of the smooth pulley 19 and not an integer number of teeth.

Selon une autre caractéristique de l'invention, non représentée aux dessins annexés, lorsque la machine textile ne dispose pas de cylindre calandreur, la courroie crantée 8 coopère avec un pignon cranté 17 monté libre en rotation dans un palier sur le bâti de la machine, en position excentrée par rapport à une droite reliant les axes des poulies lisses 11 et 13. Ainsi, la courroie crantée 8 est contrainte de réaliser un détour identique à celui qu'elle effectuerait si la machine était équipée d'un cylindre calandreur.According to another characteristic of the invention, not shown in the accompanying drawings, when the textile machine does not have a calender roll, the toothed belt 8 cooperates with a notched pinion 17 rotatably mounted in a bearing on the frame of the machine, in eccentric position relative to a straight line connecting the axes of the smooth pulleys 11 and 13. Thus, the toothed belt 8 is forced to make a detour identical to that it would perform if the machine was equipped with a calender roll.

Grâce à l'invention, il est possible de réaliser un nouveau groupe étireur de fabrication moins coûteuse que les groupes existants actuellement. En outre, un tel groupe ne nécessite plus d'entretien et n'est plus sujet à des fuites de lubrifiant. De plus, il devient possible de choisir librement les diamètres des poulies et des cylindres, de façon à les adapter précisément à la vitesse périphérique souhaitée, sans avoir à dépendre d'un rapport de nombre de dents. Enfin, les garnitures des cylindres de pression sont ménagées et ledit groupe étireur n'engendre plus de pulsations desdites garnitures, pulsations qui étaient parfois responsables de défauts textiles sur rubans ou mèches. De plus, on constate que les organes en mouvement du groupe étireur conforme à l'invention, atteignent ainsi en fonctionnement une température maximale très inférieure à celle des dispositifs connus précédemment.Thanks to the invention, it is possible to make a new manufacturing stretching unit that is less expensive than the groups that currently exist. In addition, such a group no longer requires maintenance and is no longer subject to lubricant leakage. In addition, it becomes possible to freely choose the diameters of the pulleys and cylinders, so as to adapt precisely to the desired peripheral speed, without having to depend on a ratio of number of teeth. Finally, the lining of the pressure rollers are formed and said drawing group no longer generates pulsations of said linings, pulsations that were sometimes responsible for textile defects on ribbons or strands. Moreover, it can be seen that the moving members of the stretching unit in accordance with the invention thus achieve a maximum temperature in operation that is much lower than that of the known devices. previously.

Le temps d'intervention pour un remplacement des cylindres étireurs endommagés est réduit ce qui entraîne une amélioration du rendement de la machine textile. En outre, un tel groupe étireur permet une augmentation des vitesses de production et donc des performances de la machine.The intervention time for a replacement of the damaged draw rolls is reduced which results in an improvement of the efficiency of the textile machine. In addition, such a stretching unit allows an increase in production speeds and therefore machine performance.

Claims (14)

  1. Method for controlling a line of drawing rollers of a textile machine comprising two drawing rollers (1 and 2) mounted on bearings (6) and a pressure roller (3), which is pressed against the two drawing rollers (1 and 2), and optionally a calender roller (16) cooperating with a pressure roller (18), characterised in that it substantially consists in driving in non-slip rotation one of the drawing rollers (1) and in driving in frictional rotation the other drawing roller (2).
  2. Device for the carrying out of the method according to claim 1, mounted on bearings (6), and a pressure roller (3), which is pressed against the two drawing rollers (1 and 2), and optionally a calender roller (16) cooperating with a pressure roller (18), characterised in that one of the drawing rollers (1) is driven in rotation by a notched belt (8) meshing with a pinion (7) that is integral with this first drawing roller (1), and the other drawing roller (2) is driven in rotation by a friction device.
  3. Device according to claim 2, characterised in that the friction device is in the form of a notchless belt (12) driving a smooth pulley (11), which is integral with the second drawing roller (2), in rotation.
  4. Device according to claim 2, characterised in that the second drawing roller (2) comprises at one of its ends a preferably smooth pulley (11) with a rounded rim, driven in rotation by means of a notchless belt, preferably a flat belt (12) that in turn is driven by an intermediate pulley (13) mounted on an intermediate shaft(14).
  5. Device according to claim 4, characterised in that an intermediate notched pinion (15), which is driven in rotation by the notched belt (8), is mounted on the intermediate shaft(14).
  6. Device according to claim 4, characterised in that the smooth pulley (13) is integral with the shaft (14) mounted on a ball-bearing inside a bearing (20) articulated about an articulation axis (21).
  7. Device according to any one of claims 2, 4 and 5, characterised in that the tension of the notched belt (8) is adjustable by means of a tensioning device (23), the position of which may be altered relative to the machine frame.
  8. Device according to claim 3, characterised in that, if the textile machine is provided with a calender roller (16) cooperating with a pressure roller (18), the notchless belt (12) is driven directly by means of the calender roller (16), the intermediate pulley (13) being mounted on the shaft of said calender roller and the tension of said notchless belt (12) being provided by an idler wheel arranged over the length of said belt.
  9. Device according to claim 2, characterised in that the friction device is formed by the contact between the pressure roller (3) and the drawing rollers (1 and 2).
  10. Device according to claim 2, characterised in that at least one of the rollers which make up the line of drawing rollers is mounted on bearings (6) having removable caps.
  11. Device according to claim 10, characterised in that each bearing (6) consists of a support (24a), which is integral with the machine frame, and a removable cap (24b).
  12. Device according to claim 2, characterised in that, if the textile machine is provided with a calender roller (16) cooperating with a pressure roller (18), the notched belt (8) also meshes with a notched pinion (17) mounted at one end of said calender roller (16).
  13. Device according to claim 2, characterised in that, if the textile machine is provided with a calender roller (16) cooperating with a pressure roller (18), the calender roller (16) is frictionally driven, by provision at one of its ends of a smooth pulley (19) driven in rotation by the notchless belt (12).
  14. Device according to claim 2, characterised in that, if the textile machine is not provided with a calender roller, the notched belt (8) cooperates with a notched pinion (17) mounted in a freely rotating manner in a bearing on the machine frame, in an eccentric position relative to a straight line connecting the axles of the smooth pulleys (11 and 13).
EP02802534A 2001-12-05 2002-12-03 Method and device for controlling a line of drawing rollers of a textile machine Expired - Lifetime EP1451397B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0115734A FR2833021B1 (en) 2001-12-05 2001-12-05 METHOD AND DEVICE FOR CONTROLLING A DRAWER GROUP OF A TEXTILE MACHINE
FR0115734 2001-12-05
PCT/FR2002/004161 WO2003050334A1 (en) 2001-12-05 2002-12-03 Method and device for controlling a line of drawing rollers of a textile machine

Publications (2)

Publication Number Publication Date
EP1451397A1 EP1451397A1 (en) 2004-09-01
EP1451397B1 true EP1451397B1 (en) 2006-02-01

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Application Number Title Priority Date Filing Date
EP02802534A Expired - Lifetime EP1451397B1 (en) 2001-12-05 2002-12-03 Method and device for controlling a line of drawing rollers of a textile machine

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EP (1) EP1451397B1 (en)
CN (1) CN100344812C (en)
AU (1) AU2002364920A1 (en)
FR (1) FR2833021B1 (en)
RU (1) RU2293805C2 (en)
WO (1) WO2003050334A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103741284A (en) * 2013-12-20 2014-04-23 张家港市天江精密模具制造有限公司 Textile roving frame flyer
CN112709795A (en) * 2020-12-23 2021-04-27 张振斌 Transmission device for adjusting and controlling motor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715754A (en) * 1953-11-05 1955-08-23 Earl Heard Jr M Drafting system
DE2044996A1 (en) * 1970-09-11 1972-03-16 Schubert & Salzer Maschinen Method and device for drawing fiber slivers
DE4122883A1 (en) * 1991-07-11 1993-01-14 Schurr Stahlecker & Grill Drawing unit for spinning machine - has lower roller mounting to detach it from drive shaft for belt change without stopping the spinner

Also Published As

Publication number Publication date
FR2833021B1 (en) 2004-05-28
CN100344812C (en) 2007-10-24
CN1599811A (en) 2005-03-23
RU2004120271A (en) 2005-03-10
WO2003050334A1 (en) 2003-06-19
EP1451397A1 (en) 2004-09-01
AU2002364920A1 (en) 2003-06-23
RU2293805C2 (en) 2007-02-20
FR2833021A1 (en) 2003-06-06

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