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EP2402491B1 - Machine à tricoter circulaire avec un dispositif de guidage de fil - Google Patents

Machine à tricoter circulaire avec un dispositif de guidage de fil Download PDF

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Publication number
EP2402491B1
EP2402491B1 EP20100194036 EP10194036A EP2402491B1 EP 2402491 B1 EP2402491 B1 EP 2402491B1 EP 20100194036 EP20100194036 EP 20100194036 EP 10194036 A EP10194036 A EP 10194036A EP 2402491 B1 EP2402491 B1 EP 2402491B1
Authority
EP
European Patent Office
Prior art keywords
guiding
fronts
disposed
yarn
knitting machine
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.)
Not-in-force
Application number
EP20100194036
Other languages
German (de)
English (en)
Other versions
EP2402491A1 (fr
Inventor
Kuo-Chao Chao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2402491A1 publication Critical patent/EP2402491A1/fr
Application granted granted Critical
Publication of EP2402491B1 publication Critical patent/EP2402491B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices

Definitions

  • This invention relates to a circular knitting machine, more particularly to a yarn guiding device for guiding a plurality of yarns to needles of a needle cylinder of a circular knitting machine.
  • a conventional circular knitting machine such as a hosiery machine, generally includes a yarn feeding and knitting mechanism, a needle selecting mechanism, a control mechanism, a transmitting mechanism, etc.
  • the yarn feeding and knitting mechanism 2 includes a yarn feeding mount 200 pivotably mounted on a sinker ring 300 disposed coaxially relative to a needle cylinder 400, a plurality of feeding fingers 202 which extend adjacent to the upper circumferential end 401 of the needle cylinder 400 and which respectively have through openings 203 for introducing at least one yarn, and a yarn guiding plate 204 disposed below the feeding fingers 202 for guiding the yarn toward the needle cylinder 400.
  • the yarn feeding mount 200 When it is desired to change yarn, the yarn feeding mount 200 has to be turned about a pivot 205 that is transverse to both axial and radial directions to a non-working position. With such movement, it would be unavoidable for the yarn guiding plate 204 to be incidentally brought into contact with the needles (not shown) on the needle cylinder 400, which may cause needle breakage.
  • a circular knitting machine has a thread guide fixed to a dial cam adjacent to needles on a needle cylinder so as to keep a yarn with a predetermined thread tension.
  • An object of the present invention is to provide a yarn guiding device for a circular knitting machine which has a plurality of adjustable guiding fronts movable away from a needle cylinder for facilitating the task of resuming normal operation of the yarn feeding in a non-working state.
  • the yarn guiding device includes a plurality of guiding fronts, a plurality of biasingmembers, and an actuating unit.
  • the guiding fronts are disposed upstream of needles of a needle cylinder and downstream of a corresponding yarn feeding unit in terms of a yarn feeding direction.
  • Each of the guiding fronts has a leading marginal portion extending in a circumferential direction and, when the guiding front is in a working position, guides a yarn in a working position so as to permit the needles to take up the yarn, and a trailing actuated portion disposed radially opposite to the leading marginal portion and actuated to radially displace the guiding front into a non-working position, where the leading marginal portion is remote from the needles radially as opposed to the working position.
  • Each of the biasing members is disposed to bias a corresponding one of the guiding fronts to move toward the working position.
  • the actuating unit is mounted on the upper circumferential surface of the sinker ring, and is coupled with the trailing actuated portions of the guiding fronts to actuate the trailing actuated portions so as to displace the guiding fronts between the working and non-working positions.
  • a yarn guiding device according to the present invention is shown to be mounted on a sinker ring 10 of a circular knitting machine, such as a hosiery machine.
  • the circular knitting machine includes a needle cylinder 100 with a cylinder axis (X), and having an upper circumferential end 101 for accommodating a plurality of needles (not shown) which are angularly displaced about the cylinder axis (X) and which are movable upwardly and downwardly of the upper circumferential end 101.
  • the sinker ring 10 is disposed coaxially relative to the needle cylinder 100, and has an upper circumferential surface 11 extending inwardly and radially to terminate at an inner marginal region 13 that is disposed axially above and radially spaced apart from the upper circumferential end 101 of the needle cylinder 100, an annular recess 14 extending downwardly from the upper circumferential surface 11 to terminate at a recess bottom surface 141, and extending radially and outwardly from the inner marginal region 13 to terminate at an outer marginal region 142, and a plurality of guiding slots 15 which are angularly displaced from each other about the cylinder axis (X) and each of which extends radially to have inner and outer regions 151, 152 respectively proximate to the inner and outer marginal regions 13, 142.
  • a plurality of yarn feeding units 500 angularly displaced from each other about the cylinder axis (X).
  • Each of the yarn feeding units 500 is disposed above the upper circumferential surface 11 of the sinker ring 10 for feeding a yarn toward the upper circumferential end 101 of the needle cylinder 100.
  • the yarn guiding device according to this embodiment is shown to comprise a plurality of guiding fronts 30, a plurality of biasing members 40, an actuating unit 20, a plurality of positioning units 50, and a driving lever 60.
  • Each of the guiding fronts 30 has a leading marginal portion 32 which is disposed inwardly of the inner marginal region 13 and which extends in a circumferential direction to guide a yarn in a working position so as to permit the needles on the needle cylinder 100 to take up the yarn, a trailing actuated portion 311 which is radially opposite to the leading marginal portion 32, and a guided portion 31 which is disposed between the leading marginal portion 32 and the trailing actuated portion 311 and which is disposed in and slidable radially along the respective guided slot 15 to restrict the leading marginal portion 32 to be movable only radially.
  • the trailing actuated portion 311 has first and second surface regions 312, 313 opposite to each other in the circumferential direction, and a hole 314 formed in the radial direction.
  • Each of the biasing member 40 is received in the hole 314 of the respective guiding front 30 to abut against the outer region 152 and the trailing actuated portion 311 so as to bias the corresponding guiding front 30 toward the needle cylinder 100, i.e., toward the working position.
  • the actuating unit 20 is in form of an actuating ring 20, and is rotatably mounted in the annular recess 14 to permit an outward circumferential surface 21 surrounding the cylinder axis (X) to slidably contact the outer marginal region 142 of the sinker ring 10 so as to guide turning of the actuating ring 20 about the cylinder axis (X).
  • the outward circumferential surface 21 has a plurality of cam regions 22 respectively engaging the trailing actuated portions 311 of the guiding fronts 30.
  • Each of the cam regions 22 has non-actuating and actuating zones 223, 222 distanced from the cylinder axis (X) by smaller and larger lengths, respectively.
  • Each of the positioning units 50 is affixed to the upper circumferential surface 11 of the sinker ring 10, and extends over and slidably contacts with the trailing actuated portion 311 of the respective guiding front 30 so as to stabilize the radial movement of the guiding front 30.
  • the driving lever 60 is pivotally mounted on the sinker ring 10 at a fulcrum 61, a weight end 63 having a groove 631 loosely engaging a pin 23 of the actuating ring 20, and a power end 62 operable to angularly move the weight end 63 so as to turn the actuating ring 20.
  • an anti-friction bearing 24 is interposed between the pin 23 and the groove 631 to facilitate the circumferential movement of the actuating ring 20.
  • the power end 62 is operated by a power force (such as that generated by a pressure cylinder) to turn the actuating ring 20 to a forward position, where the actuating zones 222 of the actuating ring 20 are engaged with the second surface regions 313 of the respective guiding fronts 30, and thus the trailing actuated portions 311 are actuated to radially displace the guiding fronts 30 into a non-working position, where the leading marginal portions 32 are remote from the needle cylinder 100 radially against the biasing force of the biasing members 40.
  • a power force such as that generated by a pressure cylinder
  • FIG. 6 another preferred embodiment of the yarn guiding device according to this invention is shown to be similar to the previous embodiment, except that the actuating ring 20 has a plurality of antifriction bearings 25, each of which is disposed outwardly of the groove 631 and engages the weight end 63 instead of interposition between the pin 23 and the groove 631.

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

Claims (8)

  1. Métier à tricoter circulaire comprenant un dispositif de guidage de fil, ledit métier à tricoter circulaire comportant un cylindre à aiguilles (100) avec un axe de cylindre (X), et présentant une extrémité circonférentielle supérieure (101), une pluralité d'aiguilles déplacées angulairement autour de l'axe de cylindre (X) et disposées, chacune, de manière à être déplaçables vers le haut et vers le bas de l'extrémité circonférentielle supérieure (101), une bague à crapauds (10) disposée coaxialement par rapport à la bague à aiguilles (100), et présentant une surface circonférentielle supérieure (11) s'étendant vers l'intérieur et radialement pour se terminer dans une région marginale intérieure (13) qui est disposée axialement au-dessous et radialement espacée de l'extrémité circonférentielle supérieure (101) du cylindre à aiguilles (100), et une pluralité d'unités d'alimentation de fil (500) déplacées angulairement l'une par rapport à l'autre autour de l'axe de cylindre (X), et disposées, chacune, au-dessus de la surface circonférentielle supérieure (11) de la bague à crapauds (10) pour alimenter un fil vers l'extrémité circonférentielle supérieure (101) du cylindre à aiguilles (100), ledit dispositif de guidage de fil comprenant:
    une pluralité de têtes de guidage (30) disposées, chacune, en amont des aiguilles et en aval de l'une correspondante des unités d'alimentation de fil (500) en termes d'une direction d'alimentation de fil, chacune desdites têtes de guidage (30) présentant une partie marginale avant (32) qui s'étend dans une direction circonférentielle et qui, lorsque ladite tête de guidage (30) se trouve en position de travail, guide le fil de manière à permettre que les aiguilles prennent le fil, et une partie actionnée arrière (311) qui est radialement opposée à ladite partie marginale avant (32), caractérisé par le fait que:
    ladite partie actionnée arrière (311) est actionnée de manière à déplacer radialement ladite tête de guidage (30) en une position non de travail, où ladite partie marginale avant (32) est éloignée radialement des aiguilles, par opposition à la position de travail;
    ledit dispositif de guidage de fil comprend par ailleurs:
    une pluralité d'éléments de déviation (40) disposés, chacun, de manière à dévier l'une correspondante desdites têtes de guidage (30) de manière à se déplacer vers la position de travail; et
    une unité d'actionnement (20) montée sur la surface circonférentielle supérieure (11) de la bague à crapauds (10), et couplée auxdites parties actionnées arrière (311) desdites têtes de guidage (3) pour actionner lesdites parties actionnées arrière (311) de manière à déplacer lesdites têtes de guidage (32) entre les positions de travail et non de travail.
  2. Métier à tricoter circulaire selon la revendication 1, caractérisé par le fait que l'unité d'actionnement (20) est sous forme d'une bague d'actionnement (20) qui peut tourner par rapport à la surface circonférentielle supérieure (11) autour de l'axe de cylindre (X) entre les positions avant et arrière, et qui présente une surface circonférentielle extérieure (21) entourant l'axe de cylindre (X) et présentant une pluralité de régions de came (22) qui viennent en prise respectivement avec lesdites parties actionnées arrière (311) desdites têtes de guidage (30) de sorte que, lorsque ladite bague d'actionnement (20) tourne de la position arrière vers la position avant, lesdites têtes de guidage (32) soient déplacées de la position de travail à la position non de travail.
  3. Métier à tricoter circulaire selon la revendication 2, caractérisé par le fait que chacune desdites régions à came (22) comporte des zones non d'actionnement et d'actionnement (223, 222) distantes de l'axe de cylindre (X) de longueurs respectivement plus petites et plus grandes, et venant en prise avec l'une correspondante desdites parties actionnées arrière (311) dans les positions respectivement arrière et avant.
  4. Métier à tricoter circulaire selon la revendication 2, caractérisé par le fait que la bague à crapauds (10) présente un évidement annulaire (14) s'étendant vers le bas depuis la surface circonférentielle supérieure (11) pour se terminer à une surface inférieure en retrait (141), et s'étendant radialement et vers l'extérieur depuis la région marginale intérieure pour se terminer à une région marginale extérieure (142), et une pluralité de fentes de guidage (15) déplacées angulairement l'une de l'autre autour de l'axe de cylindre (X) et s'étendant, chacune, radialement de manière à présenter des régions respectivement intérieures et extérieures (151, 152) à proximité desdites régions marginales intérieures et extérieures (13, 142);
    ladite bague d'actionnement (20) étant montée de manière rotative dans ledit évidement annulaire (14) pour permettre que ladite surface circonférentielle extérieure (21) entre en contact de manière coulissante avec ladite région marginale extérieure (142) de manière à guider la rotation de ladite bague d'actionnement (20);
    chacune desdites têtes de guidage (30) présentant une partie guidée (31) qui est disposée entre ladite partie marginale avant (32) et la partie actionnelle arrière (311) et qui est disposée dans et de manière coulissante radialement le long de l'une respective desdites fentes guidées (15) pour limiter ladite partie marginale avant (32) de manière qu'elle ne puisse se déplacer que radialement;
    chacun desdits éléments de déviation (40) étant disposé entre ladite région extérieure (152) et ladite partie actionnée arrière (311).
  5. Métier à tricoter circulaire selon la revendication 2, caractérisé par ailleurs par un levier d'entraînement (60) monté de manière pivotante sur la bague à crapauds (10) sur un pivot (61), une extrémité de poids (63) connectée à ladite bague d'actionnement (20), et une extrémité de puissance (62) pouvant être actionnée pour déplacer de manière angulaire ladite extrémité de poids (63) de manière à faire tourner ladite bague d'actionnement (20) entre les positions avant et arrière.
  6. Métier à tricoter circulaire selon la revendication 5, caractérisé par le fait que ladite extrémité de poids (63) présente une rainure (631), ladite bague d'actionnement (20) présentant une goupille (23) disposée de manière à être en prise peu serrée avec ladite rainure (631) pour permettre la rotation de ladite bague d'actionnement (20) lorsque ladite extrémité de puissance (62) est actionnée.
  7. Métier à tricoter circulaire selon la revendication 6, caractérisé par le fait que la bague d'actionnement (20) présente par ailleurs une pluralité de roulements antifriction (24, 25) disposés, chacun, de manière à venir en prise avec ladite extrémité de poids (63) pour faciliter le déplacement angulaire de ladite bague d'actionnement (20).
  8. Métier à tricoter circulaire selon la revendication 1, caractérisé par ailleurs par une pluralité d'unités de positionnement (50) fixées à la surface circonférentielle supérieure (11) de la bague à crapauds (10), et s'étendant sur et entrant en contact de manière coulissante avec lesdites parties actionnées arrière (311) de manière à stabiliser le déplacement radial desdites têtes de guidage (30).
EP20100194036 2010-06-30 2010-12-07 Machine à tricoter circulaire avec un dispositif de guidage de fil Not-in-force EP2402491B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW99121452A TW201200659A (en) 2010-06-30 2010-06-30 Yarn guide plate regulation device of hosiery knifing machine

Publications (2)

Publication Number Publication Date
EP2402491A1 EP2402491A1 (fr) 2012-01-04
EP2402491B1 true EP2402491B1 (fr) 2013-02-13

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EP20100194036 Not-in-force EP2402491B1 (fr) 2010-06-30 2010-12-07 Machine à tricoter circulaire avec un dispositif de guidage de fil

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EP (1) EP2402491B1 (fr)
TW (1) TW201200659A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104109933A (zh) * 2014-07-09 2014-10-22 徐月苗 具有改进型导纱装置的双面小圆机
CN105483925A (zh) * 2016-01-22 2016-04-13 新昌县振兴纺织机械有限公司 全电脑袜机的新型针筒、内外沉降片座及沉降片罩结构

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975927A (en) * 1970-05-19 1976-08-24 Firma Fouquet-Werke Frauz & Planck Striping apparatus for circular knitting machines
IT1069775B (it) * 1976-07-20 1985-03-25 Micheletti Fabrizio Congegno tagliafilo per macchine circolari da maglieria da calze e simili conseghetta azionata per attrito

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104109933A (zh) * 2014-07-09 2014-10-22 徐月苗 具有改进型导纱装置的双面小圆机
CN104109933B (zh) * 2014-07-09 2016-01-06 徐月苗 具有改进型导纱装置的双面小圆机
CN105483925A (zh) * 2016-01-22 2016-04-13 新昌县振兴纺织机械有限公司 全电脑袜机的新型针筒、内外沉降片座及沉降片罩结构

Also Published As

Publication number Publication date
TW201200659A (en) 2012-01-01
TWI434969B (fr) 2014-04-21
EP2402491A1 (fr) 2012-01-04

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