EP0305304B1 - Drafting arrangements for rovings or slivers on a spinning machine - Google Patents

Drafting arrangements for rovings or slivers on a spinning machine Download PDF

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Publication number
EP0305304B1
EP0305304B1 EP88420288A EP88420288A EP0305304B1 EP 0305304 B1 EP0305304 B1 EP 0305304B1 EP 88420288 A EP88420288 A EP 88420288A EP 88420288 A EP88420288 A EP 88420288A EP 0305304 B1 EP0305304 B1 EP 0305304B1
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EP
European Patent Office
Prior art keywords
support
machine
presser
splined shafts
shafts
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Expired - Lifetime
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EP88420288A
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German (de)
French (fr)
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EP0305304A1 (en
Inventor
Pierre Mirabel
Marcel Schoumacher
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Devtex
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Devtex
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Priority to AT88420288T priority Critical patent/ATE69838T1/en
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    • 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
    • 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
    • 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
    • D01H5/56—Supports for drafting elements
    • D01H5/565—Top roller arms

Definitions

  • the present invention relates to an improvement made to fiber drawing devices (in the form of wicks or ribbons) used on spinning machines when making fiber yarns of any type (spun one end, spun yarn with core, self-twisted yarn. It relates more particularly to an improvement made to stretching devices called "pendulum arms", such as for example those sold by the company SKF, well known to technicians and which are described in particular in the French patents published under the numbers 1343069 , 2081694 and 2081886.
  • Such pendulum arms which have been shown diagrammatically in FIGS. 1 and 2 appended, in side view, in the working position in FIG. 1 and in the disengaged position in FIG. 2 essentially consist of an assembly comprising, mounted on the support frame (1) of the machine, on the one hand a series of splined shafts (2), extending over the entire length of the machine and common to all the working positions, said shafts being driven in rotation, their number and spacing being a function of the materials to be treated and the drawing rates to be given and, on the other hand, pressing elements consisting of cylinders (3), mounted on a support arm (4) called "pendulum arm".
  • the pressure exerted by the cylinders (3) on the grooves (2) is obtained by means of coil springs working in compression.
  • the pressure is adjustable on each cylinder (3) individually.
  • Other means such as pneumatic means may possibly be used to ensure this pressure.
  • the arm (4) is mounted around a pivot (5) on a support (6) itself fixed on a bar (7) extending over the entire length of the loom.
  • the pressing of the pressing cylinders against the grooves (2) is obtained by means of a lever (8) on which the operator acts to either put the assembly in the working position ( Figure 1), or on the contrary move aside the pressing cylinders (3) when an operation must be carried out on the drawing system.
  • the clutch is released, after releasing the pressure, in the order of the food zone (A) towards the exit zone (B) and, when closing, the order is reversed.
  • the structure and operation of such stretching devices is clear from French patent 2081886 and will therefore not be described in detail.
  • the invention therefore relates to a device for drawing strands or ribbons of fibers on a spinning machine in order to transform this material into yarn, said device being of the pendulum arm type, essentially consisting of a assembly comprising, mounted on the support frame of the machine, on the one hand a series of splined shafts extending over the entire length of the machine and common to all the working positions, said shafts being driven in rotation and, d on the other hand, pressing elements consisting of cylinders mounted on a pivoting support arm and which comprises means making it possible to ensure the pressure of the pressing cylinders against the splined shafts and it is characterized in that the mounting on the frame of the machine the pendulum arm carrying the pressing elements is produced by means of a support comprising means making it possible to simultaneously separate the pressing cylinders in parallel the splined shaft line.
  • a support comprising means making it possible to simultaneously separate the pressing cylinders in parallel the splined shaft line.
  • the spinning machine comprises, for each working position, a stretching device making it possible to simultaneously treat two locks, that is to say in which two pendulum arms are mounted in parallel on a support bar
  • the mounting of said bar on the frame of the machine is carried out by means of a common support for these two stretching trains, said support serving as a guiding and holding element with two axes sliding, one end of which is connected to the support bar and the other end of which is subjected to the action of means making it possible to control said sliding, these means being constituted, for example, by a pneumatic cylinder whose rod acts on a cross connecting the ends of said axes.
  • the stretching device according to the invention can optionally be associated with means making it possible to automatically pinch the fibrous material when the pendulum arm is moving, as well as possibly means making it possible to separate the wick from the surface of the grooved cylinders, for example by displacement of mobile guides arranged between each cylinder and / or action of an air jet acting against the wick.
  • twin stretching system that is to say comprising two stretching trains mounted on a common support, but it is obvious that this does not is not limiting.
  • the stretching device comprises, in a similar manner to the stretching trains with conventional pendulum arms, mounted on the support frame (1) of the machine, a series of splined shafts (2) extending over the entire length of said machine and common to all working positions. These splined shafts (2) are rotated, their number and spacing being a function of the materials to be treated and the draw rate. Furthermore, some of these shafts can be associated with a sleeve system (9) as shown in FIG. 8.
  • the drawing of the wick (10) is ensured by means of pressing cylinders (3) mounted on a support arm (4) called "pendulum arm".
  • the pressure exerted by the cylinders (3) is generally obtained by means of springs (not shown) working in compression and mounted inside the arm (4).
  • the arm (4) is mounted around a pivot (5) on a support (6) itself fixed on a bar (7).
  • the bar (7) supports two similar drawing trains and which are therefore mounted in parallel on the loom.
  • the pressing of the pressing cylinder (3) against the splined shafts (2) can be obtained by means of a lever (8) on which the operator can act.
  • the mounting of the pendulum arms on the frame of the machine is carried out so as to be able to simultaneously separate all of the pressing cylinders (3) from the splined shafts (2) and this, in parallel to the latter without otherwise acting on the lever (8).
  • this simultaneous movement of all of the pressing cylinders (3) is obtained by mounting the support bar (7) on an assembly capable of being moved orthogonally to the drawing plane and which, in in this case, consists of two rods (11, 12) slidably mounted inside a support (13) itself secured to the frame (1).
  • the ends (14, 15) of the rods (11, 12) are fixed to the support bar (7), while the ends (16, 17) are, in turn, fixed to a crosspiece (18) which is connected to the rod (19) of a jack (20).
  • the jack (20) pushes the crosspiece (18) and, consequently, keeps the cylinders (3) in abutment against the grooves (2).
  • the stroke is preferably limited by providing a stop (21) on the support (13), a stop whose end (22) comes into contact with the support bar (7).
  • the stretching system according to the invention can be associated with a wick clamp (23) disposed opposite the support bar (7), such that when the latter is moved during the spacing of the pressing cylinders (3), it comes to bear against the surface of said wick clamp (23).
  • blowing system could be provided to achieve such a spacing.
  • Such a drawing device is particularly suitable for all spinning machines in which it is desired to carry out a high drawing from a food ribbon since it is possible, thanks to the simultaneous separation of all the pressure rollers, maintain the wick in its stretched state along the length of the drawing system. Furthermore, the very small footprint during opening which results from the design of such a device facilitates the installation of various accessories on the machine and in particular makes it possible to solve many problems posed by the automation of textile machines, especially when you want to associate a service robot with them.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

This invention relates to a device for drawing roves or slivers of fibers on a spinning machine with a view to converting this material into spun yarns, of the type incorporating pendulous arms, constituted essentially by an assembly comprising, mounted on the support frame of the machine, a series of splined shafts extending over the whole length of the machine and common to all the work positions, said shafts being driven in rotation and, on the other hand, presser elements constituted by rollers mounted on a pivoting support arm comprising means ensuring pressure of the presser rollers against the splined shafts, wherein the pendulous arm bearing the presser elements is assembled on the frame of the machine via a support comprising means for simultaneously separating the presser rollers parallel to the line of splined shafts.

Description

La présente invention concerne un perfectionnement apporté aux dispositifs d'étirage de fibres (sous forme de mèches ou rubans) mis en oeuvre sur les machines de filature lors de la réalisation de filés de fibres de quelque type que ce soit (filé un bout, filé à âme, filé autotordu..). Elle a trait plus particulièrement à un perfectionnement apporté aux dispositifs d'étirage dits "à bras pendulaire", tels que par exemple ceux commercialisés par la société SKF, bien connus des techniciens et qui sont décrits notamment dans les brevets français publiés sous les numéros 1343069, 2081694 et 2081886.The present invention relates to an improvement made to fiber drawing devices (in the form of wicks or ribbons) used on spinning machines when making fiber yarns of any type (spun one end, spun yarn with core, self-twisted yarn. It relates more particularly to an improvement made to stretching devices called "pendulum arms", such as for example those sold by the company SKF, well known to technicians and which are described in particular in the French patents published under the numbers 1343069 , 2081694 and 2081886.

De tels bras pendulaires qui ont été schématisés aux figures 1 et 2 annexées, en vue de côté, en position de travail à la figure 1 et en position débrayée à la figure 2 sont constitués essentiellement d'un ensemble comprenant, montés sur le bâti support (1) de la machine, d'une part une série d'arbres cannelés (2), s'étendant sur toute la longueur de la machine et communs à toutes les positions de travail, lesdits arbres étant entraînés en rotation, leur nombre et écartement étant fonction des matières à traiter et des taux d'étirage à donner et, d'autre part, d'éléments presseurs constitués de cylindres (3), montés sur un bras support (4) dit "bras pendulaire". D'une manière générale, ainsi que cela ressort notamment des brevets français précités, la pression exercée par les cylindres (3) sur les cannelés (2), est obtenue au moyen de ressorts à boudins travaillant en compression. La pression est réglable sur chaque cylindre (3) individuellement. D'autres moyens tels que des moyens pneumatiques peuvent éventuellement être utilisés pour assurer cette pression. Le bras (4) est monté autour d'un pivot (5) sur un support (6) lui-même fixé sur une barre (7) s'étendant sur toute la longueur du métier. La mise en appui des cylindres presseurs contre les cannelés (2) est obtenue au moyen d'un levier (8) sur lequel agit l'opérateur pour, soit mettre l'ensemble en position de travail (figure 1), soit au contraire écarter les cylindres pressseurs (3) lorsqu'une opération doit être faite sur le système d'étirage. En général, le débrayage se fait, après lacher de pression, dans l'ordre zone alimentaire (A) vers zone sortie (B) et, à la fermeture l'ordre est inverse. La structure et le fonctionnement de tels dispositifs d'étirage ressortent clairement du brevet français 2081886 et ne seront donc pas décrits en détail.Such pendulum arms which have been shown diagrammatically in FIGS. 1 and 2 appended, in side view, in the working position in FIG. 1 and in the disengaged position in FIG. 2 essentially consist of an assembly comprising, mounted on the support frame (1) of the machine, on the one hand a series of splined shafts (2), extending over the entire length of the machine and common to all the working positions, said shafts being driven in rotation, their number and spacing being a function of the materials to be treated and the drawing rates to be given and, on the other hand, pressing elements consisting of cylinders (3), mounted on a support arm (4) called "pendulum arm". In general, as is apparent in particular from the aforementioned French patents, the pressure exerted by the cylinders (3) on the grooves (2), is obtained by means of coil springs working in compression. The pressure is adjustable on each cylinder (3) individually. Other means such as pneumatic means may possibly be used to ensure this pressure. The arm (4) is mounted around a pivot (5) on a support (6) itself fixed on a bar (7) extending over the entire length of the loom. The pressing of the pressing cylinders against the grooves (2) is obtained by means of a lever (8) on which the operator acts to either put the assembly in the working position (Figure 1), or on the contrary move aside the pressing cylinders (3) when an operation must be carried out on the drawing system. In general, the clutch is released, after releasing the pressure, in the order of the food zone (A) towards the exit zone (B) and, when closing, the order is reversed. The structure and operation of such stretching devices is clear from French patent 2081886 and will therefore not be described in detail.

Il ressort clairement des figures 1 et 2 annexées que lorsque l'on souhaite ouvrir le système d'étirage, par exemple lors d'une relance, qu'il y a un très grand débattement entre les cannelés et les cylindres presseurs, qui dans certains cas, peut être gênant lorsque l'on souhaite automatiser de telles opérations.It is clear from the attached Figures 1 and 2 that when it is desired to open the stretching system, for example during a recovery, that there is a very large clearance between the grooves and the pressure rollers, which in certain case, can be annoying when one wishes to automate such operations.

Outre cet inconvénient, lors du débrayage, il peut se former des enroulements de fibres autour des arbres cannelés et, par ailleurs, lors de la relance, se pose le problème de l'affinage de la mèche alimentaire, problème d'autant plus important que la tendance actuelle vise à réaliser de très gros taux d'étirage et donc à utiliser des mèches alimentaires de titre élevé.In addition to this drawback, when disengaging, windings of fibers can form around the splined shafts and, moreover, during the recovery, the problem of refining the food wick arises, a problem all the more important since the current trend is to achieve very high drawing rates and therefore to use high titer food wicks.

Or on a trouvé, et c'est ce qui fait l'objet de la présente invention, un perfectionnement à de tels trains d'étirage pendulaires qui surmonte ces inconvénients et qui permet notamment d'assurer le débrayage du train d'étirage sans agir sur la pression exercée sur les cylindres presseurs et sans pivotement du bras pendulaire, tout en maintenant la mèche dans son état d'étirage, ce qui facilite les opérations de relance, notamment dans le cas où la matière alimentaire est constituée d'un ruban de fibres de titre élevé.Now we have found, and this is what is the subject of the present invention, an improvement to such pendulum stretching trains which overcomes these drawbacks and which in particular makes it possible to disengage the stretching train without acting on the pressure on pressing cylinders and without pivoting of the pendulum arm, while maintaining the wick in its stretched state, which facilitates recovery operations, in particular in the case where the food material consists of a ribbon of fibers of high titer.

D'une manière générale, l'invention concerne donc un dispositif d'étirage de mèches ou rubans de fibres sur une machine de filature en vue de transformer cette matière en filé, ledit dispositif étant du type à bras pendulaires, constitué essentiellement d'un ensemble comprenant, montés sur le bâti support de la machine, d'une part une série d'arbres cannelés s'étendant sur toute la longueur de la machine et communs à toutes les positions de travail, lesdits arbres étant entraînés en rotation et, d'autre part, d'éléments presseurs constitués de cylindres montés sur un bras support pivotant et qui comporte des moyens permettant d'assurer la pression des cylindres presseurs contre les arbres cannelés et il se caractérise en ce que le montage sur le bâti de la machine du bras pendulaire portant les éléments presseurs est réalisé par l'intermédiaire d'un support comportant des moyens permettant d'écarter simultanément les cylindres presseurs parallèlement à la ligne d'arbres cannelés. Une telle conception permet l'ouverture du bras avec un encombrement minimal, ce qui facilite l'implantation d'accessoires divers sur la machine, tels que par exemple l'installation d'un robot de service permettant une automatisation.In general, the invention therefore relates to a device for drawing strands or ribbons of fibers on a spinning machine in order to transform this material into yarn, said device being of the pendulum arm type, essentially consisting of a assembly comprising, mounted on the support frame of the machine, on the one hand a series of splined shafts extending over the entire length of the machine and common to all the working positions, said shafts being driven in rotation and, d on the other hand, pressing elements consisting of cylinders mounted on a pivoting support arm and which comprises means making it possible to ensure the pressure of the pressing cylinders against the splined shafts and it is characterized in that the mounting on the frame of the machine the pendulum arm carrying the pressing elements is produced by means of a support comprising means making it possible to simultaneously separate the pressing cylinders in parallel the splined shaft line. Such a design allows the arm to be opened with minimal bulk, which facilitates the installation of various accessories on the machine, such as for example the installation of a service robot allowing automation.

Selon une forme de réalisation conforme à l'invention dans laquelle la machine de filature comporte, pour chaque position de travail, un dispositif d'étirage permettant de traiter simultanément deux mèches, c'est-à-dire dans lequel deux bras pendulaires sont montés en parallèle sur une barre support, le montage de ladite barre sur le bâti de la machine est réalisé par l'intermédiaire d'un support commun pour ces deux trains d'étirage, ledit support servant d'élément de guidage et de maintien à deux axes coulissants dont l'une des extrémités est reliée à la barre support et dont l'autre extrémité est soumise à l'action de moyens permettant de commander ledit coulissement, ces moyens étant constitués, par exemple, par un vérin pneumatique dont la tige agit sur une traverse reliant les extrémités desdits axes.According to an embodiment according to the invention in which the spinning machine comprises, for each working position, a stretching device making it possible to simultaneously treat two locks, that is to say in which two pendulum arms are mounted in parallel on a support bar, the mounting of said bar on the frame of the machine is carried out by means of a common support for these two stretching trains, said support serving as a guiding and holding element with two axes sliding, one end of which is connected to the support bar and the other end of which is subjected to the action of means making it possible to control said sliding, these means being constituted, for example, by a pneumatic cylinder whose rod acts on a cross connecting the ends of said axes.

Par ailleurs, le dispositif d'étirage conforme à l'invention peut éventuellement être associé à des moyens permettant d'assurer un pincement automatique de la matière fibreuse lors du déplacement du bras pendulaire ainsi qu'éventuellement des moyens permettant d'écarter la mèche de la surface des cylindres cannelés, par exemple par déplacement de guides mobiles disposés entre chaque cylindre et/ou action d'un jet d'air agissant contre la mèche.Furthermore, the stretching device according to the invention can optionally be associated with means making it possible to automatically pinch the fibrous material when the pendulum arm is moving, as well as possibly means making it possible to separate the wick from the surface of the grooved cylinders, for example by displacement of mobile guides arranged between each cylinder and / or action of an air jet acting against the wick.

L'invention et les avantages qu'elle apporte seront cependant mieux compris grâce à l'exemple de réalisation donné ci-après à titre indicatif et non limitatif et qui est illustré dans les schémas annexés dans lesquels:

  • ― les figures 1 et 2 illustrent comme vu précédémment, de manière schématique, la structure et le fonctionnement d'un bras pendulaire conventionnel;
  • ― les figures 3 et 4 sont des schémas vus respectivement de côté et de dessus d'un bras pendulaire réalisé conformément à l'invention en position normale de travail;
  • ― les figures 5 et 6 sont des vues correspondantes aux figures 3 et 4, montrant un dispositif d'étirage conforme à l'invention en position ouverte, par exemple pour effectuer une opération de relance;
  • ― la figure 7 est une vue partielle, de face, d'une machine de filature équipée d'un dispositif d'étirage conforme à l'invention;
  • ― la figure 8 est une coupe selon l' axe A de la figure 7.
The invention and the advantages which it brings will however be better understood thanks to the example of embodiment given below by way of non-limiting illustration and which is illustrated in the attached diagrams in which:
  • - Figures 1 and 2 illustrate as seen previously, schematically, the structure and operation of a conventional pendulum arm;
  • - Figures 3 and 4 are diagrams viewed respectively from the side and from above of a pendulum arm produced in accordance with the invention in normal working position;
  • - Figures 5 and 6 are views corresponding to Figures 3 and 4, showing a stretching device according to the invention in the open position, for example to perform a recovery operation;
  • - Figure 7 is a partial front view of a spinning machine equipped with a stretching device according to the invention;
  • - Figure 8 is a section along the axis A of Figure 7.

Dans la suite de la description, les éléments du dispositif conforme à l'invention similaires à ceux des bras pendulaires conventionnels, seront désignés par les mêmes références que celles utilisées précédemment pour les figures 1 et 2.In the following description, the elements of the device according to the invention similar to those of conventional pendulum arms, will be designated by the same references as those used previously for FIGS. 1 and 2.

Par ailleurs, dans la suite de la description, l'invention sera décrite pour un système d'étirage jumelé, c'est-à-dire comportant deux trains d'étirage montés sur un support commun, mais il est évident que cela n'est pas limitatif.Furthermore, in the following description, the invention will be described for a twin stretching system, that is to say comprising two stretching trains mounted on a common support, but it is obvious that this does not is not limiting.

Si l'on se reporte aux figures annexées, le dispositif d'étirage conforme à l'invention comporte, d'une manière similaire aux trains d'étirage à bras pendulaire conventionnels, montés sur le bâti support (1) de la machine, une série d'arbres cannelés (2) s'étendant sur toute la longueur de ladite machine et communs à toutes les positions de travail. Ces arbres cannelés (2) sont entraînés en rotation, leur nombre et écartement étant fonction des matières à traiter et du taux d'étirage. Par ailleurs, certains de ces arbres peuvent être associés à un système à manchon (9) comme représenté à la figure 8.Referring to the appended figures, the stretching device according to the invention comprises, in a similar manner to the stretching trains with conventional pendulum arms, mounted on the support frame (1) of the machine, a series of splined shafts (2) extending over the entire length of said machine and common to all working positions. These splined shafts (2) are rotated, their number and spacing being a function of the materials to be treated and the draw rate. Furthermore, some of these shafts can be associated with a sleeve system (9) as shown in FIG. 8.

L'étirage de la mèche (10) est assuré au moyen de cylindres presseurs (3) montés sur un bras support (4) dit "bras pendulaire". La pression exercée par les cylindres (3) est obtenue en général au moyen de ressorts (non représentés) travaillant en compression et montés à l'intérieur du bras (4). Le bras (4) est monté autour d'un pivot (5) sur un support (6) lui-même fixé sur une barre (7). Dans le cas présent, la barre (7) supporte deux trains d'étirage similaires et qui sont donc montés en parallèle sur le métier. Conformément à l'art antérieur, la mise en appui du cylindre presseur (3) contre les arbres cannelés (2) peut être obtenue au moyen d'un levier (8) sur lequel peut agir l'opérateur.The drawing of the wick (10) is ensured by means of pressing cylinders (3) mounted on a support arm (4) called "pendulum arm". The pressure exerted by the cylinders (3) is generally obtained by means of springs (not shown) working in compression and mounted inside the arm (4). The arm (4) is mounted around a pivot (5) on a support (6) itself fixed on a bar (7). In the present case, the bar (7) supports two similar drawing trains and which are therefore mounted in parallel on the loom. According to the prior art, the pressing of the pressing cylinder (3) against the splined shafts (2) can be obtained by means of a lever (8) on which the operator can act.

Par ailleurs, conformément au perfectionnement apporté par l'invention, le montage des bras pendulaires sur le bâti de la machine est réalisé de manière à pouvoir écarter simultanément l'ensemble des cylindres presseurs (3) des arbres cannelés (2) et ce, parallèlement à ces derniers sans par ailleurs agir sur le levier (8). Selon le mode de réalisation illustré, ce déplacement simultané de l'ensemble des cylindres presseurs (3) est obtenue en montant la barre d'appui (7) sur un ensemble susceptible d'être déplacé orthogonalement au plan d'étirage et qui, dans le cas présent, est constitué de deux tiges (11, 12) montées coulissantes à l'intérieur d'un support (13) lui-même solidaire du bâti (1). Les extrémités (14, 15) des tiges (11, 12) sont fixées à la barre d'appui (7), alors que les extrémités (16, 17) sont, quant à elles, fixées à une traverse (18) qui est reliée à la tige (19) d'un vérin (20). En position normale de travail (voir fig. 3 et 4), le vérin (20) repousse la traverse (18) et, par suite, maintient les cylindres (3) en appui contre les cannelés (2). La course est de préférence limitée en prévoyant une butée (21) sur le support (13), butée dont l'extrémité (22) vient en contact avec la barre support (7).Furthermore, in accordance with the improvement provided by the invention, the mounting of the pendulum arms on the frame of the machine is carried out so as to be able to simultaneously separate all of the pressing cylinders (3) from the splined shafts (2) and this, in parallel to the latter without otherwise acting on the lever (8). According to the illustrated embodiment, this simultaneous movement of all of the pressing cylinders (3) is obtained by mounting the support bar (7) on an assembly capable of being moved orthogonally to the drawing plane and which, in in this case, consists of two rods (11, 12) slidably mounted inside a support (13) itself secured to the frame (1). The ends (14, 15) of the rods (11, 12) are fixed to the support bar (7), while the ends (16, 17) are, in turn, fixed to a crosspiece (18) which is connected to the rod (19) of a jack (20). In the normal working position (see fig. 3 and 4), the jack (20) pushes the crosspiece (18) and, consequently, keeps the cylinders (3) in abutment against the grooves (2). The stroke is preferably limited by providing a stop (21) on the support (13), a stop whose end (22) comes into contact with the support bar (7).

Lorsque l'on souhaite arrêter le système d'étirage, par exemple pour effectuer une relève de bobine pleine ou un changement de pot de mèche alimentaire, il suffit de commander le vérin (20) qui permet l'entraînement de la barre de liaison (18), donc l'entraînement des axes (11, 12) et, par suite, le déplacement de la barre support (7), donc des cylindres presseurs (3) (voir fig. 5, 6).When it is desired to stop the stretching system, for example to carry out a full reel rewinding or a change of food wick pot, it suffices to order the jack (20) which allows the drive of the connecting bar ( 18), therefore the drive of the axes (11, 12) and, consequently, the displacement of the support bar (7), therefore of the pressing cylinders (3) (see fig. 5, 6).

Grâce à un tel dispositif, il est donc possible d'écarter les cylindres presseurs (3) des arbres cannelés (2) parallèlement à ces derniers, donc en ayant un encombrement minimum et en maintenant la mèche dans son état d'étirage.Thanks to such a device, it is therefore possible to separate the pressing cylinders (3) from the splined shafts (2) parallel to the latter, therefore having a minimum bulk and keeping the wick in its stretched state.

De plus, ainsi que cela ressort des figures de détail 7 et 8, le système d'étirage conforme à l'invention peut être associé à un pince-mèches (23) disposé en regard de la barre d'appui (7), de telle sorte que lorsque cette dernière est déplacée lors de l'écartement des cylindres presseurs (3), elle vienne s'appuyer contre la surface dudit pince-mèches (23).In addition, as is apparent from the detail figures 7 and 8, the stretching system according to the invention can be associated with a wick clamp (23) disposed opposite the support bar (7), such that when the latter is moved during the spacing of the pressing cylinders (3), it comes to bear against the surface of said wick clamp (23).

De plus, si les éléments de guidage de la mèche à l'entrée du système d'étirage et entre chaque zone comprise entre les cannelés et les cylindres presseurs peuvent être fixes (voir fig. 8), il pourrait être envisagé de relier ces éléments de guidage à la barre support (7) (ou tout autre élément déplacé lors de l'écartement des rouleaux presseurs), ce qui permet d'écarter la mèche des cylindres cannelés et élimine par là tout risque d'enroulement de ladite mèche.In addition, if the guide elements of the wick at the entrance of the drawing system and between each zone between the grooves and the pressure rolls can be fixed (see fig. 8), it could be envisaged to connect these elements guide to the support bar (7) (or any other element moved during the spacing of the pressing rollers), which makes it possible to separate the wick from the fluted cylinders and thereby eliminates any risk of winding of said wick.

D'autres éléments additionnels tels que par exemple un système de soufflage pourrait être prévu pour réaliser un tel écartement.Other additional elements such as for example a blowing system could be provided to achieve such a spacing.

Un tel dispositif d'étirage est particulièrement adapté pour toutes les machines de filature dans lesquelles on souhaite réaliser un étirage élevé à partir d'un ruban alimentaire étant donné qu'il est possible, grâce à l'écartement simultané de tous les rouleaux presseurs, de maintenir la mèche dans son état étiré sur la longueur du système d'étirage. Par ailleurs, le très faible encombrement lors de l'ouverture qui résulte de la conception d'un tel dispositif facilite l'implantation d'accessoires divers sur la machine et notamment permet de résoudre de nombreux problèmes posés par l'automatisation des machines textiles, notamment lorsque l'on souhaite leur associer un robot de service.Such a drawing device is particularly suitable for all spinning machines in which it is desired to carry out a high drawing from a food ribbon since it is possible, thanks to the simultaneous separation of all the pressure rollers, maintain the wick in its stretched state along the length of the drawing system. Furthermore, the very small footprint during opening which results from the design of such a device facilitates the installation of various accessories on the machine and in particular makes it possible to solve many problems posed by the automation of textile machines, especially when you want to associate a service robot with them.

Il est évident, bien que cela n'ait pas été dit précédemment, qu'il est toujours possible d'utiliser un tel dispositif d'étirage de manière conventionnelle comme illustré aux figures 1 et 2.It is obvious, although it has not been said previously, that it is still possible to use such a drawing device in a conventional manner as illustrated in FIGS. 1 and 2.

Claims (5)

1. Device for drawing roves or slivers of fibers on a spinning machine with a view to converting this material into spun yarns, of the type incorporating pendulous arms, constituted essentially by an assembly comprising, mounted on the support frame (1) of the machine, a series of splined shafts (2) extending over the whole length of the machine and common to all the work positions, said shafts being driven in rotation and, on the other hand, presser elements (3) constituted by rollers mounted on a pivoting support arm (4) comprising means ensuring pressure of the presser rollers (3) against the splined shafts (2), characterized in that the pendulous arm (4) bearing the presser elements (3) is assembled on the frame (1) of the machine via a support comprising means for simultaneously separating the presser rollers (3) parallel to the line of splined shafts (2).
2. Drawing device according to the claim 1, comprising two pendulous arms (4) mounted in parallel on a support bar (7), characterized in that said bar (7) is mounted on the frame of the machine via a common support (13) for these two drawing systems, said support (13) serving as element for guiding and maintaining two sliding spindles (11, 12) of which one of the ends (14, 15) is connected to the support bar (7) and of which the other end (16, 17) is subjected to the action of means for controlling said slide.
3. Drawing device according to the claim 2, characterized by the fact that the means for controlling slide of the spindles (3) are constituted by a pneumatic jack (20) whose rod (19) acts on a cross member (18) connecting the ends (16, 17) of the spindles (11, 12).
4. Drawing device of one of claims 1 to 3, characterized in that it is associated with means (21) for ensuring automatic gripping of the fibrous material during displacement of the pendulous arm.
5. Drawing device of one of claims 1 to 4, characterized in that it comprises means for moving the rove away from the surface of the splined shafts (2) during displacement of the presser rollers (3).
EP88420288A 1987-08-28 1988-08-25 Drafting arrangements for rovings or slivers on a spinning machine Expired - Lifetime EP0305304B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88420288T ATE69838T1 (en) 1987-08-28 1988-08-25 DRAFTING DEVICE FOR ROVING YARN OR SLIPPING IN A SPINNING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8712176 1987-08-28
FR8712176A FR2619830B1 (en) 1987-08-28 1987-08-28 DEVICE FOR DRAWING FIBER CORDS OR RIBBONS ON A SPINNING MACHINE

Publications (2)

Publication Number Publication Date
EP0305304A1 EP0305304A1 (en) 1989-03-01
EP0305304B1 true EP0305304B1 (en) 1991-11-27

Family

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Application Number Title Priority Date Filing Date
EP88420288A Expired - Lifetime EP0305304B1 (en) 1987-08-28 1988-08-25 Drafting arrangements for rovings or slivers on a spinning machine

Country Status (9)

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US (1) US4878268A (en)
EP (1) EP0305304B1 (en)
JP (1) JPH01139823A (en)
KR (1) KR890004006A (en)
CN (1) CN1031729A (en)
AT (1) ATE69838T1 (en)
BR (1) BR8804187A (en)
DE (1) DE3866475D1 (en)
FR (1) FR2619830B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3904108A1 (en) * 1989-02-11 1990-08-16 Zinser Textilmaschinen Gmbh LOAD CARRIERS FOR STRETCH WORKS
JP2013253359A (en) * 2012-06-08 2013-12-19 Murata Mach Ltd Spinning machine
DE102018112422A1 (en) * 2018-05-24 2019-11-28 Saurer Spinning Solutions Gmbh & Co. Kg Drawframe and plug-in unit for a spinning machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2398756A (en) * 1943-05-25 1946-04-16 Saco Lowell Shops Textile drawing frame
US2686940A (en) * 1947-08-28 1954-08-24 Saco Lowell Shops Textile drawing mechanism
FR1343069A (en) * 1961-11-22 1963-11-15 Skf Kugellagerf Abriken Gmbh Locking device for the presser support arms of the upper rolls of drawing trains on spinning machines
ES388837A1 (en) * 1970-03-04 1973-06-01 Skf Kugellagerfabriken Gmbh Apparatus for mounting top rollers
FR2081886A1 (en) * 1970-03-12 1971-12-10 Skf Kugellagerfabriken Gmbh Upper roller support arm for spinning machin
JPS5557020A (en) * 1978-10-16 1980-04-26 Toray Ind Inc Manufacturing device of spun yarn
JPS62257426A (en) * 1986-04-25 1987-11-10 Toray Ind Inc Method for stopping spinning frame by winding of fiber on draft roller and spinning frame using said method

Also Published As

Publication number Publication date
US4878268A (en) 1989-11-07
EP0305304A1 (en) 1989-03-01
FR2619830B1 (en) 1989-11-24
BR8804187A (en) 1989-03-14
JPH01139823A (en) 1989-06-01
DE3866475D1 (en) 1992-01-09
FR2619830A1 (en) 1989-03-03
KR890004006A (en) 1989-04-19
ATE69838T1 (en) 1991-12-15
CN1031729A (en) 1989-03-15

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