EP0135640B1 - 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
EP0135640B1
EP0135640B1 EP83402539A EP83402539A EP0135640B1 EP 0135640 B1 EP0135640 B1 EP 0135640B1 EP 83402539 A EP83402539 A EP 83402539A EP 83402539 A EP83402539 A EP 83402539A EP 0135640 B1 EP0135640 B1 EP 0135640B1
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EP
European Patent Office
Prior art keywords
machine
rollers
knitting
plate
knitted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83402539A
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German (de)
French (fr)
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EP0135640A1 (en
Inventor
José Abril Cullell
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Individual
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Individual
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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.
  • GB-A-1 243 661 describes a knitting system comprising in particular a plate against which an endless band is wedged, said band being mounted between a roller and another plate and sliding on the upper edge of said other plate, so as to obtain a pinch effect for knitting.
  • the subject of the present invention is a system as characterized in claim 1.
  • the difficulty which the systems of the prior art provide 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 positive drive, so that the rate and the extent of this drive coincide with the rate of the operational cycles of the machine and with the extent of knitting obtained during each cycle.
  • a main roller (1) motor or drive receiving the movement with the collaboration of a ratchet wheel (2), which in turn receives 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 positive movement, at a rate and extent consistent with each working cycle of the machine during the making of knitted pieces (3-4 ).
  • the main roller (1) which rotates in the direction of the arrow shown in Figure 1, transmits a traction or positive drive of the knitting down through 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 plane 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.
  • 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.

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

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.

Le brevet GB-A-1 243 661 décrit un système de tricotage comportant notamment une plaque contre laquelle est coincée une bande sans fin, ladite bande étant montée entre un rouleau et une autre plaque et glissant sur le bord supérieur de ladite autre plaque, de manière à obtenir un effet de pincement pour le tricot.GB-A-1 243 661 describes a knitting system comprising in particular a plate against which an endless band is wedged, said band being mounted between a roller and another plate and sliding on the upper edge of said other plate, so as to obtain a pinch effect for knitting.

La présente invention a pour objet un système tel qu'il est caractérisé dans la revendication 1.The subject of the present invention is a system as characterized in claim 1.

Grâce aux perfectionnements proposés par l'invention, la difficulté que procurent les systèmes de l'art antérieur 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, the difficulty which the systems of the prior art provide 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 positif, 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 positive drive, so that the rate and the extent of this drive coincide with the rate of the operational cycles of the machine and with the extent of knitting obtained during each cycle.

Etant donné que l'étirage est déterminé lors de chaque cycle de travail par l'ampleur de l'entraînement positif, 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 positive 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 machine's work cycles.

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 positif, 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 roller (1) motor or drive receiving the movement with the collaboration of a ratchet wheel (2), which in turn receives 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 positive movement, at a rate and extent consistent with each working cycle of the machine during the making of 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 positif 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 Figure 1, transmits a traction or positive drive of the knitting down through 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 plan rectiligne et descendant qui coïncide 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 plane 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 and regular stretching whatever the shape and thickness of the pieces, 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. 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.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. 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. 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.
2. Improvements according to claim 1, characterised in that the plate 7 oscillates and in that the system comprises a plurality of endless belts made of rubber (5), which exert a pressure on the knitted pieces when these are held on the said oscillating plate (7).
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
ES524774A ES8405861A1 (en) 1983-08-05 1983-08-05 Fabric take-down device for flat knitting machines.
ES524774 1983-08-05

Publications (2)

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

Family

ID=8486128

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1213694B (en) * 1987-10-02 1989-12-29 Emm Srl DEVICE FOR VERTICAL STRETCHING OF THE FABRIC IN AN AUTOMATIC RECTILINEAR KNITTING MACHINE
GB9217068D0 (en) * 1992-08-12 1992-09-23 Univ Montfort Knitting and handling of articles
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
GB2499991A (en) 2012-03-05 2013-09-11 Solaredge Technologies Ltd DC link circuit for photovoltaic array

Family Cites Families (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
CH606569A5 (en) * 1975-11-14 1978-11-15 Steiger Atelier De Constructio
DE2648612A1 (en) * 1976-10-27 1978-05-03 Stoll & Co H ADJUSTABLE DRIVE DEVICE FOR ROLLER GOODS DRAWING FROM FLAT KNITTING MACHINES

Also Published As

Publication number Publication date
JPH0411661B2 (en) 1992-03-02
ES524774A0 (en) 1984-06-16
JPS6039457A (en) 1985-03-01
EP0135640A1 (en) 1985-04-03
ES8405861A1 (en) 1984-06-16

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