EP0135640A1 - Fabric take-down device for flat knitting machines - Google Patents
Fabric take-down device for flat knitting machines Download PDFInfo
- 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
- Authority
- EP
- European Patent Office
- Prior art keywords
- machine
- rollers
- knitting
- pinching
- 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.)
- Granted
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Classifications
-
- 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
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.
- 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)
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 true EP0135640A1 (en) | 1985-04-03 |
EP0135640B1 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 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0135640B1 (en) |
JP (1) | JPS6039457A (en) |
ES (1) | ES8405861A1 (en) |
Cited By (3)
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)
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)
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 |
-
1983
- 1983-08-05 ES ES524774A patent/ES8405861A1/en not_active Expired
- 1983-11-11 JP JP58213169A patent/JPS6039457A/en active Granted
- 1983-12-27 EP EP83402539A patent/EP0135640B1/en not_active Expired
Patent Citations (4)
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)
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 |
---|---|
JPH0411661B2 (en) | 1992-03-02 |
EP0135640B1 (en) | 1989-03-15 |
JPS6039457A (en) | 1985-03-01 |
ES524774A0 (en) | 1984-06-16 |
ES8405861A1 (en) | 1984-06-16 |
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