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EP2570537B1 - Fadenführer für eine Flachstrickmaschine - Google Patents

Fadenführer für eine Flachstrickmaschine Download PDF

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Publication number
EP2570537B1
EP2570537B1 EP20110181582 EP11181582A EP2570537B1 EP 2570537 B1 EP2570537 B1 EP 2570537B1 EP 20110181582 EP20110181582 EP 20110181582 EP 11181582 A EP11181582 A EP 11181582A EP 2570537 B1 EP2570537 B1 EP 2570537B1
Authority
EP
European Patent Office
Prior art keywords
yarn feeding
yarn
arm
flat knitting
knitting machines
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
EP20110181582
Other languages
English (en)
French (fr)
Other versions
EP2570537A1 (de
Inventor
Yu-Sheng Lin
Yi Chen Chen
Kai Ying Cheng
Jian-Hao Peng
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.)
Pai Lung Machinery Mill Co Ltd
Original Assignee
Pai Lung Machinery Mill Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pai Lung Machinery Mill Co Ltd filed Critical Pai Lung Machinery Mill Co Ltd
Priority to EP20110181582 priority Critical patent/EP2570537B1/de
Publication of EP2570537A1 publication Critical patent/EP2570537A1/de
Application granted granted Critical
Publication of EP2570537B1 publication Critical patent/EP2570537B1/de
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
    • D04B15/56—Thread guides for flat-bed knitting machines

Definitions

  • the present invention relates to a yarn feeder for flat knitting machines and particularly to a linkage type yarn feeder for flat knitting machines.
  • a conventional flat knitting machine When a conventional flat knitting machine knits a fabric, it usually employs a plurality of intarsia yarn feeders to form special intarsia on the fabric. In order to efficiently knit complicated intarsia combinations on the fabric, the flat knitting machine commonly uses computer to control movement and operation of the intarsia yarn feeders.
  • design of the intarsia yarn feeder not only provides a state of supplying the yarn via the yarn feeding aperture to the knitting needle for intarsia knitting, but also includes another state of moving the yarn feeding aperture away from the aforesaid position so that the knitting needle does not hook the yarn from the yarn feeding aperture.
  • the conventional intarsia yarn feeder mainly adopts a swinging approach to move the yarn from the yarn feeding aperture away the knitting needle.
  • U.S. patent No. 6,981,393 discloses yarn feeders of flat knitting machine that includes a yarn feeder case slidable on a yarn guide rail at the upper portion of a needle bed and a driven mechanism to selectively perform linkage movements.
  • the yarn feeder case has a switching mechanism that can be swung to switch a yarn feeding aperture between a yarn feeding position and a waiting position.
  • the switching mechanism also can be swung on the yarn feeder case and move a pivotal rod up and down to support the middle portion of a yarn feeding rod.
  • the yarn feeding aperture is formed at the lower end of the yarn feeding rod while the middle portion forms a swing operating portion, and the upper end forms a pressing portion to overcome the lifting elastic force to lower the yarn feeding aperture to a yarn supply position. It further has a setting device to set lift return of the swinging operating portion. When the yarn feeding aperture is located at the yarn supply position and the yarn feeding rod is moved downwards, the swinging operating portion set by the setting device is switched to an upward direction for returning.
  • European patent No. EP 1788132 discloses a yarn feeder for a flat knitting machine that can be moved longitudinally along a yarn feeder guide track via a transmission pulley mounted on a triangular slide rack, and also has a yarn feeder arm movable reciprocatedly between a yarn feeding position and at least one yarn feeding stopping position.
  • the yarn feeder has at least one adjustment element for the yarn feeder arm that has a gear acting on a second adjustment element via a pinion to adjust the movement of the yarn feeder arm.
  • US 4,052,865 discloses a yarn feeder for flat knitting machines located on a yarn feeder guide track and movable transversely thereon; a baseboard slidably coupled on the yarn feeder guide track; a first rocking arm including a first pivot coupled with the baseboard and a first pressed end to receive a horizontal force to swing respectively in a skew manner about the first pivot end serving as fulcrums; and a yarn feeding unit including a yarn feeding arm and a first linkage bar hinged on the yarn feeding arm and the first rocking arm to move simultaneously, the yarn feeding arm including a yarn feeding position in which the first pressed end is not swung and at least one yarn feeding stopping position in which the first pressed is swung by receiving the horizontal force to drive the yarn feeding arm to skew via the first linkage bar.
  • the aforesaid conventional techniques adopt different designs to drive the yarn feeder arm.
  • due to adjustment elements are numerous, they are prone to generate interference among them in movements that could interrupt operation of the yarn feeder arm.
  • the primary object of the present invention is to overcome the problems of the conventional intarsia yarn feeders with complex design and numerous elements that result in higher costs.
  • the present invention provides a yarn feeder for flat knitting machines that is located on a yarn feeder guide track and movable transversely thereon.
  • the yarn feeder includes a baseboard slidably coupled on the yarn feeder guide track, a first rocking arm, a second rocking arm and a yarn feeding unit that are located on the baseboard.
  • the first rocking arm and second rocking arm have respectively a first pivot end and a second pivot end coupled with the baseboard, and a first pressed end and a second pressed end that can receive a horizontal force to swing in a skew manner respectively about the first pivot end and second pivot end serving as fulcrums.
  • the yarn feeding unit includes a yarn feeding arm located between the first and second rocking arms, and a first linkage bar hinged on the yarn feeding arm and the first rocking arm to move simultaneously, and a second linkage bar hinged on the yarn feeding arm and the second rocking arm to move simultaneously.
  • the yarn feeding arm has a yarn feeding position in which the first pressed end of the first rocking arm or the second pressed end of the second rocking arm is not swung, and at least one yarn feeding stopping position in which the first or second pressed end is swung by receiving a horizontal force to drive the yarn feeding arm to skew simultaneously via the first and second linkage bars.
  • the yarn feeding arm includes a guiding portion
  • the baseboard has a guiding track corresponding to the guiding portion
  • the guiding track includes two shifting sections and a retaining section between the shifting sections, and the retaining section is a concave structure.
  • the guiding portion is a guiding roller.
  • the guiding track is located on a guiding bump butted by the guiding portion.
  • the baseboard has an elastic piece
  • the yarn feeding arm has a butting member pressing the elastic piece to allow the guiding portion to butt the guiding track.
  • the first pressed end includes a first switching portion
  • the second pressed end includes a second switching portion
  • the first and second switching portions are bridged by a linkage spring
  • the baseboard has a first positioning bolt and a second positioning bolt
  • the first switching portion and second switching portion have respectively a butting surface leaning on the first and second positioning bolts when the yarn feeding arm is at the yarn feeding position, and a latching surface latching on the first and second positioning bolts when the yarn feeding arm is at the yarn feeding stopping position.
  • the yarn feeding arm has a sliding slot
  • the baseboard has a fastening element inserting into the sliding slot to restrict the swinging displacement of the yarn feeding arm.
  • a cover lid is provided to couple with the baseboard to cover the first rocking arm, second rocking arm and yarn feeding unit.
  • the yarning feeding arm of the invention swings in a skew manner via a linkage bar structure located on the baseboard so that the yarning feeding arm can switch between the yarn feeding position and yarn feeding stopping position, and thus provides many advantages, notably:
  • the flat knitting machine includes at least a yarn feeder guide track 10 to allow a yarn feeder 20 to move transversely by sliding to a position where yarn feeding is performed.
  • the yarn feeder 20 mainly includes a baseboard 21 slidably coupled on the yarn feeder guide track 10, a first rocking arm 22, a second rocking arm 23 and a yarn feeding unit 24 that are located on the baseboard 21.
  • the first rocking arm 22 has a first pivot end 221 coupled with the baseboard 21 and a first pressed end 222 to receive a horizontal force to swing about the first pivot end 221 serving as a fulcrum.
  • the second rocking arm 23 has a second pivot end 231 coupled with the baseboard 21 and a second pressed end 232 to receive another horizontal force to swing about the second pivot end 231 serving as a fulcrum.
  • the yarn feeding unit 24 includes a yarn feeding arm 25 located between the first and second rocking arms 22 and 23, and a first linkage bar 241 hinged on the yarn feeding arm 25 and the first rocking arm 22 to move simultaneously, and a second linkage bar 242 hinged on the yarn feeding arm 25 and the second rocking arm 23 to move simultaneously.
  • the yarn feeding arm 25 has a yarn feeding position in which the first pressed end 222 of the first rocking arm 22 or second pressed end 232 of the second rocking arm 23 is not swung, and at least one yarn feeding stopping position in which the first or second pressed end 222 or 232 is swung by receiving a horizontal force to drive the yarn feeding arm 25 to skew via the first and second linkage bars 241 and 242.
  • the yarn feeding arm 25 has a sliding slot 253.
  • the baseboard 21 has a fastening element 30 inserting into the sliding slot 253 to limit the swinging displacement of the yarn feeding arm 25.
  • the yarn feeding arm 25 swings about the fastening element 30 serving as a fulcrum between the yarn feeding position and yarn feeding stopping position.
  • the yarn feeding arm 25 has a guiding portion 251
  • the baseboard 21 has a guiding bump 26 corresponding to and butted by the guiding portion 251.
  • the guiding bump 26 has a guiding track 261 to guide the guiding portion 251 to move correspondingly.
  • the guiding track 261 includes two shifting sections 262 and 262a and a retaining section 263 located therebetween and formed in a concave structure.
  • the guiding portion 251 is a guiding roller movable along the guiding track 261 and between the shifting sections 262 and 262a and retaining section 263.
  • the baseboard 21 has an elastic piece 27, and the yarn feeding arm 25 has a butting member 252 butting the elastic piece 27 to provide a pressing force for the guiding portion 251 to butt against the guiding track 261.
  • the first pressed end 222 has a first switching portion 223, and the second pressed end 232 has a second switching portion 233.
  • the first and second switching portions 223 and 233 are bridged by a linkage spring 28.
  • the first switching portion 223 and second switching portion 233 have respectively a butting surface 224 and 234, and a latching surface 225 and 235.
  • the baseboard 21 has a first positioning bolt 291 and a second positioning bolt 292 located outside the first switching portion 223 and second switching portion 233.
  • the yarn feeder 20 further has a cover lid 40 to couple with the baseboard 21 to cover the first rocking arm 22, second rocking arm 23 and yarn feeding unit 24 as shown in FIG. 2 .
  • FIGS. 3A and 3B Please refer to FIGS. 3A and 3B for an embodiment of the invention in operating conditions.
  • the first and second pressed ends 222 and 232 of the first and second rocking arms 22 and 23 do not respectively receive a horizontal force from a switch bar (not shown in the drawings) of the flat knitting machine, the first and second switching portions 223 and 233 of the first and second rocking arms 22 and 23 butt the first positioning bolt 291 and second positioning bolt 292 via the butting surfaces 224 and 234 so that the yarn feeding arm 25 remains at the yarn feeding position (referring to FIG. 3A ).
  • the elastic piece 27 provides a pressing force for the butting member 252, and the guiding portion 251 butts the retaining section 263 to be positioned therein temporarily.
  • the first switching portion 223 or 233 of the first or second rocking arm 22 or 23 When the first or second switching portion 223 or 233 of the first or second rocking arm 22 or 23 is driven by the switch bar (not shown in the drawings), the first switching portion 223 swings relative to the first pressed end 222 or the second switching portion 233 swings relative to the second pressed end 232, and also moves towards the first positioning bolt 291 or second positioning bolt 292, and then the first positioning bolt 291 or second positioning bolt 292 enters from the original position at the butting surface 224 or 234 to the latching surface 225 or 235 of the first or second switching portion 223 or 233 to form a latching state, thereby drives the first rocking arm 22 and second rocking arm 23 to swing in a skew manner.
  • the yarn feeding arm 25 coupled with the first and second rocking arms 22 and 23 also swing correspondingly via the first and second linkage bars 241 and 242 to switch from the yarn feeding position to the yarn feeding stopping position shown in FIG. 3B .
  • the guiding portion 251 of the yarn feeding arm 25 escapes from the concave structure of the retaining section 263 and enters the shifting section 262 or 262a.
  • the shifting sections 262 and 262a are inclined to allow the yarn feeding arm 25 to swing about the fastening element 30 serving as a fulcrum in a skew manner at the yarn feeding stopping position.
  • the switch bar (not shown in the drawings) provides a counter horizontal force to the first or second pressed end 222 or 232 to swing the first or second rocking arm 22 or 23 in the opposite direction, and also drive the first and second linkage bars 241 and 242 to return the yarn feeding arm 25 to the yarn feeding position.
  • the yarn feeder of the invention employs a linkage bar system to swing the yarn feeding arm between the yarn feeding position and yarn feeding stopping position.
  • the invention provides a simpler structure, and can reduce production and assembly costs.
  • interference among elements to drive the yarn feeding arm swinging also is eliminated, hence the probability of malfunction also decreases. It provides a significant improvement over the conventional techniques.
  • a yarn feeder for flat knitting machines is located on a yarn feeder guide track 10 to move transversely thereon and includes a baseboard 21 slidably coupled on the yarn feeder guide track 10, a first rocking arm 22, a second rocking arm 23 and a yarn feeding unit 24 located on the baseboard 21.
  • the first and second rocking arms 22, 23 have respectively a first pivot end 221 and a second pivot end 231 coupled with the baseboard 21, and a first pressed end 222 and a second pressed end 232 to receive a horizontal force to swing respectively about the first and second pivot ends 221, 231 serving as fulcrums.
  • the yarn feeding unit 24 includes a yarn feeding arm 25 located between the first and second rocking arms 22, 23, and a first linkage bar 241 hinged on the yarn feeding arm 25 and first rocking arm 22 to move simultaneously, and a second linkage bar 242 hinged on the yarn feeding arm 25 and second rocking arm 23 to move simultaneously.

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

Claims (11)

  1. Fadenführer für Flachstrickmaschinen, der an einer Faden-Zuführungsbahn (10) und quer-beweglich darauf angeordnet ist, umfassend:
    eine Hauptplatte (21), die verschiebbar auf Faden-Zuführungsbahn (10) verkoppelt ist;
    einen ersten Schwenkarm (22) und einen zweiten Schwenkarm (23) mit jeweils einem ersten Schwenkpunkt (221) und einem zweiten Schwenkpunkt (231), die mit der Hauptplatte (21) und einem ersten gepresstem Ende (222) und einem zweiten gepresstem Ende (232) verkoppelt ist, um eine horizontale Kraft aufzunehmen, um jeweils in einer schräglaufenden Weise um den ersten Schwenkpunkt (221) und den zweiten Schwenkpunkt (231) zu schwenken, die als Drehpunkte dienen; und
    eine Fadenzuführeinheit (24), die einen Fadenzuführungsarm (25) aufweist, der zwischen dem ersten Schwenkarm (22) und dem zweiten Schwenkarm (23) angeordnet ist, und eine erste Verbindungsstange (241) aufweist, die an dem Fadenzuführungsarm (25) und dem ersten Schwenkarm (22) angelenkt ist, um sich gleichzeitig zu bewegen, und eine zweite Verbindungsstange (242) aufweist, die an dem Fadenzuführungsarm (25) und dem zweiten Schwenkarm (23) angelenkt ist, um sich gleichzeitig zu bewegen, wobei der Fadenzufuhrungsarm (25) eine Fadenzuführungs-Position vorsieht, in welcher das erste gepresste Ende (222) oder das zweite gepresste Ende (232) nicht geschwenkt wird, und mindestens eine Fadenzuführungs-Stopposition vorsieht, in welcher das erste gepresste Ende (222) oder das zweite gepresste Ende (232) geschwenkt wird die horizontale Kraft, um den Fadenzuführungsarm (25) anzutreiben, gleichzeitig schräg über die erste Verbindungsstange (241) und die zweite Verbindungsstange (242) zu laufen.
  2. Fadenführer für Flachstrickmaschinen nach Anspruch 1, wobei der Fadenzuführungsarm (25) einen Führungsabschnitt (251) aufweist, wobei die Hauptplatte (21) eine Führungsbahn (261) passend zu dem Führungsabschnitt (251) aufweist.
  3. Fadenführer für Flachstrickmaschinen nach Anspruch 2, wobei die Führungsbahn (261) zwei Verstellabschnitte (262, 262a) und einen dazwischen angeordneten Halteabschnitt (263) aufweist.
  4. Fadenführer für Flachstrickmaschinen nach Anspruch 3, wobei der Halteabschnitt (263) einer konkaven Struktur entspricht.
  5. Fadenführer für Flachstrickmaschinen nach einem der Ansprüche 2-4, wobei der Führungsabschnitt (251) einer Führungsrolle entspricht.
  6. Fadenführer für Flachstrickmaschinen nach einem der Ansprüche 2-5, wobei die Führungsbahn (251) auf einem Führungshöcker (26) angeordnet ist, der von dem Führungsabschnitt (251) angeschlagen wird.
  7. Fadenführer für Flachstrickmaschinen nach einem der Ansprüche 2-6, wobei die Hauptplatte (21) ein elastisches Teil (27) aufweist, der Fadenzuführungsarm (25) ein Anschlagelement (252) aufweist, das das elastische Teils (27) presst, um dem Führungsabschnitt (251) zu ermöglichen, an die Führungsbahn (261) anzuschlagen.
  8. Fadenführer für Flachstrickmaschinen nach einem der vorhergehenden Ansprüche, wobei das erste gepresste Ende (222) einen ersten Verstellabschnitt (223) und das zweite gepresste Ende (232) einen zweiten Verstellabschnitt (233) aufweist, wobei der erste Verstellabschnitt (223) und der zweite Verstellabschnitt (233) von einer Verbindungsfeder (28) überbrückt werden.
  9. Fadenführer für Flachstrickmaschinen nach Anspruch 8, wobei die Hauptplatte (21) einen ersten Positionierungsbolzen (291) und eine zweite Positionierungsbolzen (292) aufweist, wobei der erste Verstellabschnitt (223) und der zweite Verstellabschnitt (233) jeweils eine Anschlagfläche (224, 234) aufweisen, die an dem ersten Positionierungsbolzen (291) und dem zweiten Positionierungsbolzen (292) anlehnt, wenn der Fadenzuführungsarm (25) sich an der Fadenzuführ-Position befmdet, und eine Verriegelungsfläche (225, 235) aufweist, die an dem ersten Positionierungsbolzen (291) und dem zweiten Positionierungsbolzen (292) verriegelt, wenn der Fadenzuführungsarm (25) sich an der Fadenzuführ-Stopposition befindet.
  10. Fadenführer für Flachstrickmaschinen nach einem der vorhergehenden Ansprüche, wobei der Fadenzuführungsarm (25) einen Gleitschlitz (253) aufweist und die Hauptplatte (21) ein Befestigungselement (30) aufweist, das in den Gleitschlitz (253) eingeführt ist, um die schwenkende Verlagerung des Fadenzuführungsarm (25) zu begrenzen.
  11. Fadenführer für Flachstrickmaschinen nach einem der vorhergehenden Ansprüche, ferner aufweisen einen Verschlussdeckel (40), der mit der Hauptplatte (21) verkoppelt ist, um den ersten Schwenkarm (22), den zweiten Schwenkarm (23) und die Fadenzuführeinheit (24) abzudecken.
EP20110181582 2011-09-16 2011-09-16 Fadenführer für eine Flachstrickmaschine Not-in-force EP2570537B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110181582 EP2570537B1 (de) 2011-09-16 2011-09-16 Fadenführer für eine Flachstrickmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110181582 EP2570537B1 (de) 2011-09-16 2011-09-16 Fadenführer für eine Flachstrickmaschine

Publications (2)

Publication Number Publication Date
EP2570537A1 EP2570537A1 (de) 2013-03-20
EP2570537B1 true EP2570537B1 (de) 2015-03-04

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ID=44785403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110181582 Not-in-force EP2570537B1 (de) 2011-09-16 2011-09-16 Fadenführer für eine Flachstrickmaschine

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EP (1) EP2570537B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103741359B (zh) * 2013-12-19 2015-05-27 瑞安市威克横机配件有限公司 组合交织导纱器
CN108589003A (zh) * 2018-08-08 2018-09-28 张家港市利佳纺织有限公司 一种氨纶导纱打结处理装置
US11421354B2 (en) * 2019-02-27 2022-08-23 Pai Lung Machinery Mill Co., Ltd. Flat knitting machine yarn feeder with variable yarn feeding positions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1037710B (it) * 1975-04-29 1979-11-20 Zamark Srl Dispositivo guidafili per macchine rettilinee da maglieria
CN100445447C (zh) 2001-03-29 2008-12-24 株式会社岛精机制作所 纬编机的导纱器
EP1715092B1 (de) * 2005-04-21 2012-08-29 H. Stoll GmbH & Co. KG Fadenführer für eine Flachstrickmaschine
EP1788132B1 (de) 2005-11-17 2011-08-17 H. Stoll GmbH & Co. KG Flachstrickmaschine mit einem Fadenführer

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