EP0135640A1 - Fabric take-down device for flat knitting machines - Google Patents

Fabric take-down device for flat knitting machines Download PDF

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Publication number
EP0135640A1
EP0135640A1 EP83402539A EP83402539A EP0135640A1 EP 0135640 A1 EP0135640 A1 EP 0135640A1 EP 83402539 A EP83402539 A EP 83402539A EP 83402539 A EP83402539 A EP 83402539A EP 0135640 A1 EP0135640 A1 EP 0135640A1
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EP
European Patent Office
Prior art keywords
machine
rollers
knitting
pinching
knitted
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Granted
Application number
EP83402539A
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German (de)
French (fr)
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EP0135640B1 (en
Inventor
José Abril Cullell
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ABRIL CULLELL
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ABRIL CULLELL
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Application filed by ABRIL CULLELL filed Critical ABRIL CULLELL
Publication of EP0135640A1 publication Critical patent/EP0135640A1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/88—Take-up or draw-off devices for knitting products
    • D04B15/90—Take-up or draw-off devices for knitting products for flat-bed knitting machines

Definitions

  • the present invention relates to a new system for stretching knitted fabrics on straight knitting machines which presents a significant technological progress compared to conventional systems.
  • this difficulty is resolved in a completely satisfactory manner by ensuring a regular stretching of the knitted fabric whatever the shape of the knitted panels and their dimensional variation.
  • the stretching of the knitted panels is kept regular even if their thickness also varies.
  • the recommended improvements are based on the transmission to the panels or parts of a pinching effect with repelling drive, so that the rate and extent of this training coincide with the cadence of the operational cycles of the machine and with the extent of the knitting obtained during each cycle.
  • a main motor or drive roller (1) receiving the movement with the collaboration of a ratchet wheel (2), which receives in turn a movement of an eccentric or else by means of an individual motor, not shown in the figure, regulating the advance of said main roller (1) by a repelling movement at a rate and extent conforming to each work cycle of the machine when making knitted pieces (3-4).
  • the main roller (1) which rotates in the direction of the arrow shown in FIG. 1, transmits a traction or drive pushing the knitting down thanks to the collaboration of a series of rubber bands (5), which are four in number in the embodiment shown, extending between said main roller (1) and the corresponding stretching rollers (6) of reduced diameter, located coaxially at the outlet of the set of needles between the two needle beds of the machine.
  • the arrangement of the rollers (1 and 6) determines for the rubber bands (5) a straight and descending sector which coincides with the mean vertical plane of the machine and adapts to each of the lateral faces of the knitted pieces (3-4) by pressing said parts against an oscillating plate (7).
  • the rubber bands (5) must be perfectly tensioned to fulfill their function of pinching against the oscillating plate (7) and driving the knitted pieces, with the collaboration of tension rollers (8) assisted by springs (9) regulating the unfolding of these bands.
  • FIG. 1 in dotted lines and under reference (10), a set of pressure rollers has been shown corresponding to a conventional stretching system, to highlight the total conceptual and structural disparity of the two systems, as well as the fact of whether or not the installation of such conventional balls (10) has no conventional influence on the stretching system proposed by the invention.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Abstract

1. Improvements to systems of stretching knitting on rectilinear knitting machines of the type comprising a plate (7) cooperating with at least one endless belt (5) so as to pinch the knitted pieces, characterised in that the device also comprises a motor roller (1) appropriately synchronised with the machine, and rollers of a relatively small diameter (6) mounted at the exit from the line of needles, the said belt (5) extending between the motor roller and the said rollers and stretched by virtue of the collaboration of auxiliary tensioning rollers (8) assisted by corresponding springs, in such a manner that the knitted pieces are pinched and positively driven in a vertical plane coinciding with the imaginary vertical plane, which is the median plane of the machine, the pinching and positive driving effect coinciding with the working cycles of the machine, the degree of the said pinching and driving effect corresponding to the amount of knitting obtained with each cycle of the machine.

Description

La présente invention se réfère à un nouveau système d'étirage de tricots sur des machines à tricoter rectilignes qui présente un progrès technologique notable par rapport aux systèmes conventionnels.The present invention relates to a new system for stretching knitted fabrics on straight knitting machines which presents a significant technological progress compared to conventional systems.

Les systèmes conventionnels, qui sont tout à fait acceptables lorsque les panneaux tricotés ont une largeur constante sur toute leur longueur, sont d'une efficacité douteuse lorsqu'il s'agit de panneaux qui, de par leur forme, ont une largeur variable. La difficulté importante à résoudre est dans ce dernier cas un étirage irrégulier et anormal qui s'avère insuffisant aux endroits où le panneau s'élargit et excessif aux autres endroits où il se rétrécit.Conventional systems, which are quite acceptable when the knitted panels have a constant width over their entire length, are of questionable effectiveness when it comes to panels which, by their shape, have a variable width. The major difficulty to be solved in the latter case is an irregular and abnormal stretching which is insufficient at the places where the panel widens and excessive at the other places where it shrinks.

Grâce aux améliorations proposées par l'invention, cette difficulté est résolue de façon pleinement satisfaisante en assurant un étirage régulier du tricot quelle que soit la forme des panneaux tricotés et leur variation dimensionnelle.Thanks to the improvements proposed by the invention, this difficulty is resolved in a completely satisfactory manner by ensuring a regular stretching of the knitted fabric whatever the shape of the knitted panels and their dimensional variation.

L'étirage des panneaux tricotés est maintenu régulier même au cas où leur épaisseur varie également.The stretching of the knitted panels is kept regular even if their thickness also varies.

Pour cela, les perfectionnements préconisés se basent sur la transmission aux panneaux ou pièces d'un effet de pincement avec entraînement repoussant, de telle sorte que la cadence et l'ampleur de cet entraînement coïncident avec la cadence des cycles opérationnels de la machine et avec l'ampleur du tricot obtenu lors de chaque cycle.For this, the recommended improvements are based on the transmission to the panels or parts of a pinching effect with repelling drive, so that the rate and extent of this training coincide with the cadence of the operational cycles of the machine and with the extent of the knitting obtained during each cycle.

Etant donné que l'étirage est déterminé lors de chaque cycle de travail par l'ampleur de l'entraînement repoussant, il s'ensuit que cet étirage est totalement indépendant de la forme et des dimensions du panneau tricoté et qu'il est toujours parfaitement régulier et adapté aux cycles de travail de la machine.Since the stretch is determined during each work cycle by the magnitude of the repelling drive, it follows that this stretch is completely independent of the shape and dimensions of the knitted panel and that it is always perfectly regular and adapted to the working cycles of the machine.

Pour compléter la description réalisée ci-après et afin d'en faciliter la compréhension des caractéristiques de l'invention, on annexe au présent mémoire descriptif, en tant que partie intégrante de celui-ci, des dessins sur lesquels, à titre illustratif et non limitatif :

  • La figure 1 est une coupe transversale d'une machine à tricoter rectiligne pourvue d'un système d'étirage faisant l'objet de la présente invention.
  • La figure 2 est une vue en élévation frontale de la machine représentée sur la figure précédente de laquelle pendent deux panneaux tricotés, concrètement deux corps, pouvant constituer des pièces de dos ou de devant, un ensemble de trois manches étant représenté plus bas et pouvant être obtenu de la même façon que les précédents, sans variation du système d'étirage et avec une parfaite régularité.
To complete the description made below and in order to facilitate understanding of the characteristics of the invention, there is annexed to this descriptive memory, as an integral part thereof, drawings in which, by way of illustration and not limiting:
  • Figure 1 is a cross section of a straight knitting machine provided with a stretching system forming the subject of the present invention.
  • Figure 2 is a front elevational view of the machine shown in the previous figure from which hang two knitted panels, concretely two bodies, which can constitute pieces from the back or front, a set of three sleeves being shown below and can be obtained in the same way as the previous ones, without variation of the stretching system and with perfect regularity.

Sur les figures mentionnées, on représente une des multiples possibilités de réalisation pratique d'un système d'étirage selon les perfectionnements proposés par l'invention, et conformément à cet exemple de réalisation, on dispose sous les fontures de la machine et de façon sensiblement tangentielle à son plan vertical moyen, un rouleau principal (1) moteur ou d'entraînement recevant le mouvement avec la collaboration d'une roue à cliquets (2), laquelle reçoit à son tour un mouvement d'un excentrique ou bien au moyen d'un moteur individuel, non représenté sur la figure, réglant l'avance dudit rouleau principal (1) par un mouvement repoussant à cadence et ampleur conformes à chaque cycle de travail de la machine lors de la confection des pièces tricotées (3-4).In the figures mentioned, one of the multiple possibilities of practical realization of a stretching system according to the improvements proposed by the invention is shown, and in accordance with this exemplary embodiment, there are disposed under the needle beds of the machine and in a substantially tangential to its mean vertical plane, a main motor or drive roller (1) receiving the movement with the collaboration of a ratchet wheel (2), which receives in turn a movement of an eccentric or else by means of an individual motor, not shown in the figure, regulating the advance of said main roller (1) by a repelling movement at a rate and extent conforming to each work cycle of the machine when making knitted pieces (3-4).

Le rouleau principal (1), qui tourne dans le sens de la flèche représentée sur la figure 1, transmet une traction ou entraînement repoussant du tricot vers le bas grâce à la collaboration d'une série de bandes en caoutchouc (5), qui sont au nombre de quatre dans l'exemple de réalisation représenté, s'étendant entre ledit rouleau principal (1) et les rouleaux d'étirage correspondants (6) de diamètre réduit, situés coaxialement à la sortie du jeu d'aiguilles entre les deux fontures de la machine.The main roller (1), which rotates in the direction of the arrow shown in FIG. 1, transmits a traction or drive pushing the knitting down thanks to the collaboration of a series of rubber bands (5), which are four in number in the embodiment shown, extending between said main roller (1) and the corresponding stretching rollers (6) of reduced diameter, located coaxially at the outlet of the set of needles between the two needle beds of the machine.

La disposition des rouleaux (1 et 6) détermine pour les bandes en caoutchouc (5) un secteur rectiligne et descendant qui coincide avec le plan vertical moyen de la machine et s'adapte à chacune des faces latérales des pièces tricotées (3-4) en appuyant lesdites pièces contre une plaque (7) oscillante.The arrangement of the rollers (1 and 6) determines for the rubber bands (5) a straight and descending sector which coincides with the mean vertical plane of the machine and adapts to each of the lateral faces of the knitted pieces (3-4) by pressing said parts against an oscillating plate (7).

Les bandes en caoutchouc (5) doivent être parfaitement tendues pour remplir leur fonction de pinçage contre la plaque oscillante (7) et d'entraînement des pièces tricotées, avec la collaboration de rouleaux tenseurs (8) assistés par des ressorts (9) réglant le déroulement de ces bandes.The rubber bands (5) must be perfectly tensioned to fulfill their function of pinching against the oscillating plate (7) and driving the knitted pieces, with the collaboration of tension rollers (8) assisted by springs (9) regulating the unfolding of these bands.

Il ressort de ce qui précède que les pièces tricotées, à leur sortie de la ligne d'aiguilles, sont pincées entre les bandes en caoutchouc (5) et la plaque oscillante (7) et se voient soumises lors de chaque cycle de travail de la machine à une traction vers le bas de même ampleur que celle du tricot obtenu à l'issue de ce cycle, ce qui assure un étirage continu et régulier quelle que soit la forme et l'épaisseur des pièces, dans la mesure où celles-ci n'affectent pas le système préconisé.It appears from the above that the knitted parts, at their exit from the needle line, are pinched between the rubber bands (5) and the oscillating plate (7) and are subjected during each work cycle of the machine with a pull down of the same magnitude as that of the knitted fabric obtained at the end of this cycle, which ensures continuous stretching and regular regardless of the shape and thickness of the parts, insofar as these do not affect the recommended system.

Sur la figure 1, en pointillés et sous référence (10), on a représenté un ensemble de rouleaux presseurs correspondant à un système conventionnel d'étirage, pour mettre en évidence la totale disparité conceptuelle et structurelle des deux systèmes, ainsi que le fait de ce que l'installation ou non de telles pelotes conventionnelles (10) n'a pas d'influence conventionnelle sur le système d'étirage proposé par l'invention.In FIG. 1, in dotted lines and under reference (10), a set of pressure rollers has been shown corresponding to a conventional stretching system, to highlight the total conceptual and structural disparity of the two systems, as well as the fact of whether or not the installation of such conventional balls (10) has no conventional influence on the stretching system proposed by the invention.

Bien entendu, l'invention n'est nullement limitée au mode de réalisation de l'exemple décrit et représenté, elle est susceptible de nombreuses variantes accessibles à l'homme de l'art, suivant les applications envisagées et sans s'écarter pour cela du cadre de l'invention.Of course, the invention is in no way limited to the embodiment of the example described and shown, it is capable of numerous variants accessible to those skilled in the art, depending on the applications envisaged and without departing from it. of the scope of the invention.

Claims (2)

1. Perfectionnements aux systèmes d'étirage de tricot sur machines à tricoter rectilignes, carac- térisésen ce qu'ils consistent à imprimer aux pièces tricotées, à la ligne de sortie des aiguilles de la machine, un effet de pincement avec entraînement repoussant dont la cadence coïncide avec celle des cycles de travail de la machine et dont l'ampleur est celle du tricot obtenu lors de chaque cycle de la machine.1. Improvements in knitting drawing systems on rectilinear knitting machines, characterized in that they consist in imparting to the knitted pieces, at the output line of the needles of the machine, a pinching effect with repelling drive, the rate coincides with that of the machine's work cycles and the extent of which is that of the knitted fabric obtained during each machine cycle. 2. Perfectionnements aux systèmes d'étirage de tricot sur machines à tricoter rectilignes selon la revendication 1, caractérisés en ce que ledit effet de pincement avec entraînement repoussant est obtenu au moyen d'un rouleau moteur (1) actionné soit par un excentrique (2), soit par un moteur à impulsions individuel dûment synchronisé avec la machine, et un jeu de rouleaux de diamètre réduit (6) installés à la sortie de la ligne d'aiguilles, en disposant entre le rouleau moteur et ce jeu de rouleaux une série de bandes en caoutchouc (5) dûment tendues grâce à la collaboration de rouleaux tenseurs auxiliaires (8) assistés des ressorts correspondants, de sorte que sur ces bandes en caoutchouc soit défini un secteur vertical, à déplacement poussant et descendant, coïncidant avec le plan imaginaire vertical et moyen de la machine, qui exerce une pression sur l'une des faces des pièces tricotées et contre une plaque oscillante (7) se trouvant sur la face opposée, de sorte qu'entre ces bandes et ladite plaque l'on obtient l'effet recherché de pincement et entraînement repoussant.2. Improvements in knitting stretching systems on straight knitting machines according to claim 1, characterized in that said pinching effect with repelling drive is obtained by means of a motor roller (1) actuated either by an eccentric (2 ), either by an individual impulse motor duly synchronized with the machine, and a set of reduced diameter rollers (6) installed at the exit of the needle line, placing a series between the driving roller and this set of rollers of rubber bands (5) duly stretched thanks to the collaboration of auxiliary tension rollers (8) assisted by the corresponding springs, so that on these rubber bands is defined a vertical sector, with pushing and descending movement, coinciding with the imaginary plane vertical and medium of the machine, which exerts pressure on one of the faces of the knitted pieces and against an oscillating plate (7) located on the opposite face, so that between these strips and said plate the desired effect of pinching and entrainment is obtained repulsive.
EP83402539A 1983-08-05 1983-12-27 Fabric take-down device for flat knitting machines Expired EP0135640B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES524774 1983-08-05
ES524774A ES8405861A1 (en) 1983-08-05 1983-08-05 Fabric take-down device for flat knitting machines.

Publications (2)

Publication Number Publication Date
EP0135640A1 true EP0135640A1 (en) 1985-04-03
EP0135640B1 EP0135640B1 (en) 1989-03-15

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EP83402539A Expired EP0135640B1 (en) 1983-08-05 1983-12-27 Fabric take-down device for flat knitting machines

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EP (1) EP0135640B1 (en)
JP (1) JPS6039457A (en)
ES (1) ES8405861A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310576A1 (en) * 1987-10-02 1989-04-05 E.M.M. EMILIANA MACCHINE MAGLIERIE s.r.l. Device for effecting and maintaining the vertical tension of the fabric in automatic flat knitting machines
WO1994004735A1 (en) * 1992-08-12 1994-03-03 De Montfort University Knitting and handling of articles
US9639106B2 (en) 2012-03-05 2017-05-02 Solaredge Technologies Ltd. Direct current link circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102051759B (en) * 2010-12-29 2014-05-07 绍兴金昊机械制造有限公司 Roller structure of computer controlled flat knitting machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1243661A (en) * 1968-01-08 1971-08-25 Courtaulds Ltd A flat bar v-bed knitting machine with improved fabric take down
DE2427117A1 (en) * 1974-06-05 1976-01-02 Stoll & Co H Flat bed knitter fabric withdrawal - has hooked bed and counter pliable band to prevent fabric damage and distortion
FR2331636A1 (en) * 1975-11-14 1977-06-10 Steiger Sa Atelier Constr PULLING DEVICE FOR STRAIGHT-LINE KNITTING MACHINE
DE2648612A1 (en) * 1976-10-27 1978-05-03 Stoll & Co H ADJUSTABLE DRIVE DEVICE FOR ROLLER GOODS DRAWING FROM FLAT KNITTING MACHINES

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1243661A (en) * 1968-01-08 1971-08-25 Courtaulds Ltd A flat bar v-bed knitting machine with improved fabric take down
DE2427117A1 (en) * 1974-06-05 1976-01-02 Stoll & Co H Flat bed knitter fabric withdrawal - has hooked bed and counter pliable band to prevent fabric damage and distortion
FR2331636A1 (en) * 1975-11-14 1977-06-10 Steiger Sa Atelier Constr PULLING DEVICE FOR STRAIGHT-LINE KNITTING MACHINE
DE2648612A1 (en) * 1976-10-27 1978-05-03 Stoll & Co H ADJUSTABLE DRIVE DEVICE FOR ROLLER GOODS DRAWING FROM FLAT KNITTING MACHINES

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310576A1 (en) * 1987-10-02 1989-04-05 E.M.M. EMILIANA MACCHINE MAGLIERIE s.r.l. Device for effecting and maintaining the vertical tension of the fabric in automatic flat knitting machines
US4854134A (en) * 1987-10-02 1989-08-08 E.M.M. S.R.L. Device for effecting and maintaining the vertical tension of the fabric in automatic flat knitting machines
WO1994004735A1 (en) * 1992-08-12 1994-03-03 De Montfort University Knitting and handling of articles
GB2283986A (en) * 1992-08-12 1995-05-24 Univ Montfort Knitting and handling of articles
GB2283986B (en) * 1992-08-12 1996-09-11 Univ Montfort Knitting and handling of articles
US9639106B2 (en) 2012-03-05 2017-05-02 Solaredge Technologies Ltd. Direct current link circuit

Also Published As

Publication number Publication date
ES524774A0 (en) 1984-06-16
JPS6039457A (en) 1985-03-01
EP0135640B1 (en) 1989-03-15
ES8405861A1 (en) 1984-06-16
JPH0411661B2 (en) 1992-03-02

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