EP2868608A1 - Positive Fadenzufuhrvorrichtung mit Steuerung der Zufuhrspannung - Google Patents

Positive Fadenzufuhrvorrichtung mit Steuerung der Zufuhrspannung Download PDF

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Publication number
EP2868608A1
EP2868608A1 EP20140002706 EP14002706A EP2868608A1 EP 2868608 A1 EP2868608 A1 EP 2868608A1 EP 20140002706 EP20140002706 EP 20140002706 EP 14002706 A EP14002706 A EP 14002706A EP 2868608 A1 EP2868608 A1 EP 2868608A1
Authority
EP
European Patent Office
Prior art keywords
yarn
winding wheel
tension
feeder
wound
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
Application number
EP20140002706
Other languages
English (en)
French (fr)
Other versions
EP2868608B1 (de
Inventor
Giovanni Pedrini
Pietro Zenoni
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.)
LGL Electronics SpA
Original Assignee
LGL Electronics SpA
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 LGL Electronics SpA filed Critical LGL Electronics SpA
Publication of EP2868608A1 publication Critical patent/EP2868608A1/de
Application granted granted Critical
Publication of EP2868608B1 publication Critical patent/EP2868608B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/388—Regulating forwarding speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/18—Driven rotary elements
    • 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
    • D04B15/48—Thread-feeding devices
    • D04B15/50—Thread-feeding devices for elastic threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B65H2701/319—Elastic threads

Definitions

  • the present invention relates to a positive yarn feeder provided with a system for controlling the feeding tension.
  • the yarn is wound on a drum which is driven to rotate by a motor for drawing the yarn from a reel and delivering it to a downstream textile machine, e.g., a knitting machine.
  • a control unit modulates the speed of the motor based on a tension signal received from a tension sensor, in order to maintain the tension of the yarn (which depends on the difference between the speed at which the yarn is delivered by the feeder and the speed at which it is drawn by the textile machine) substantially constant on a desired level, with advantages in terms of quality of the output mesh.
  • this type of yarn feeder is not suitable for feeding yarns having a high elasticity and/or a relatively high count, e.g., in the range 400 and 1000 decitex, because these yarns al liable to slip on the drum, thereby affecting the accuracy of the feeding process particularly in relation to the control of the tension.
  • feeders in which the yarn passes between two motorized, counter-rotating wheels in tangential contact with each other.
  • the motor is always controlled in axis with the textile machine, so that it always delivers the amount of yarn requested by the machine without any control on the feeding tension, with consequent limitations in terms of quality of the output mesh.
  • a main object of the present invention to provide a positive yarn feeder for textile machines which is also capable of accurately feeding yarns having a high elasticity and/or a high count, under a controlled tension.
  • a yarn feeder 10 comprises a motor 11 received in a housing 12 and provided with a driving shaft 15.
  • a yarn-winding wheel 16 keyed to driving shaft 15 has a yarn Y wound thereon.
  • Yarn-winding wheel 16 is driven to rotate by motor 11 for drawing yarn from a reel R (which is only diagrammatically shown in Fig. 2 ) and feeding it to a textile machine M (which is also diagrammatically shown in Fig. 2 ).
  • Yarn feeder 10 is provided with a brake 18 (known per se) which is adapted to apply a slight, static braking action upon yarn Y upstream of yarn-winding wheel 16, in order to maintain yarn Y under a slight tension.
  • the braking action exerted by brake 18 is manually adjustable by a knob 18a.
  • An anti-baloon disc 19 which is also known per se, is arranged immediately upstream of brake 18.
  • Yarn Y unwinding from yarn-winding wheel 16 operatively engages a tension sensor 26 incorporated in the feeder.
  • motor 11 is driven by a control unit CU, which is also incorporated in the feeder and is programmable by a display 28 and push buttons 30.
  • Control unit CU modulates the speed of yarn-winding wheel 16 by feedback on the basis of the tension signal generated by tension sensor 26, in such a way as to maintain the tension of yarn Y (which depends on the difference between the speed at which the yarn is delivered by the feeder and the speed at which it is drawn by the textile machine) substantially constant on a desired level.
  • yarn Y is wound in a single loop in a circumferential groove 32 of yarn-winding wheel 16, which groove has a substantially V-shaped profile which is defined between two counterposed annular surfaces 34, 36 having respective toothings in an alternated configuration (i.e., the teeth 38 of one toothing face the intervals between the teeth 40 of the opposite toothing); in addition, yarn feeder 10 is provided with a deviating arm 42 having a yarn-guiding eyelet 44 which is slidably engaged by yarn Y between brake 18 and yarn-winding wheel 16, in a position such that the yarn entering yarn-winding wheel 16 does not contact the yarn delivered from the same.
  • deviating arm 42 is arranged in such a way as to deviate yarn Y both laterally and longitudinally with respect to the axis of yarn-winding wheel 16. Accordingly, the yarn entering the wheel initially engages only one of the two toothings (the right-hand toothing in Fig. 5 ) while the yarn delivered from the wheel only engages the opposite toothing (the left-hand toothing in Fig. 5 ), so that any risk of contact is prevented.
  • yarn-winding wheel 16 is advantageously comprised of a disc-shaped support 50 and of a ring 52 removably fitted to disc-shaped support 50; circumferential groove 32 being formed on the ring.
  • Disc-shaped support 50 is provided with a hub 54 by which it is keyed to driving shaft 15, and with a support ring 56 which is connected to the hub by spokes 58.
  • Support ring 56 has a peripheral seat 59 in which ring 52 is received.
  • Yarn feeder 10 is also provided with a loop-separing device 60 known per se.
  • loop-separing device 60 is not used because yarn Y is wound on yarn-winding wheel 16 in the form of a single loop.
  • deviating arm 42 is provided with a foot 62, which is shaped in such a way as to removably engage a corresponding seat 64 of housing 12, so that it can be removed if necessary.
  • toothings 38, 40 of groove 32 increase the friction between yarn Y and yarn-winding wheel 16, thereby preventing slippage even in case of yarns having high elasticity and a relatively high count.
  • deviating arm 42 allows yarn Y to unwind smoothly and regularly from wheel 16 so that it prevents yarn Y from overlapping or creeping against itself while unwinding from the yarn-winding wheel towards tension sensor 26, as shown in detali in Fig. 5 .
  • deviating arm 42 is arranged in such a way as to deviate the yarn upstream of yarn-winding wheel 16.
  • a similar result may be achieved by positioning deviating arm 142 in such a way as to deviate the yarn downstream of yarn-winding wheel 16.
  • annular surfaces 34, 36 have counterposed frustoconical profiles.
  • the yarn, in groove 32 comes into contact with the teeth only, what matters is that the above substantially V-shaped profile is defined between the profiles of the counterposed annular toothings, regardless of the profile of the annular surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Knitting Machines (AREA)
EP14002706.1A 2013-10-29 2014-08-02 Positive Fadenzufuhrvorrichtung mit Steuerung der Zufuhrspannung Active EP2868608B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000875A ITTO20130875A1 (it) 2013-10-29 2013-10-29 Alimentatore di filato positivo con controllo della tensione di alimentazione.

Publications (2)

Publication Number Publication Date
EP2868608A1 true EP2868608A1 (de) 2015-05-06
EP2868608B1 EP2868608B1 (de) 2016-06-08

Family

ID=49920516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14002706.1A Active EP2868608B1 (de) 2013-10-29 2014-08-02 Positive Fadenzufuhrvorrichtung mit Steuerung der Zufuhrspannung

Country Status (3)

Country Link
EP (1) EP2868608B1 (de)
CN (1) CN104555583B (de)
IT (1) ITTO20130875A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019155346A1 (en) * 2018-02-06 2019-08-15 Btsr International S.P.A. Method and improved yarn feeder system and device for optimising yarn feed to a textile machine operating highly discontinuously or with alternating motion

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1023564B1 (nl) * 2015-11-03 2017-05-05 VAN DE WIELE Michel NV Garenspanningssysteem en werkwijze voor het onder spanning houden van een garen dat van een garenopslagsysteem afgenomen wordt naar een garenafneemsysteem van een weefmachine toe
CN111607890B (zh) * 2020-05-29 2022-02-15 江南大学 一种裸氨丝添纱横编针织物的织造方法及其纱线喂入装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714494A (en) * 1953-09-23 1955-08-02 Specialties Dev Corp Yarn tension compensating device
US3772869A (en) * 1970-02-27 1973-11-20 Zinser Textilmaschinen Gmbh Twist stopping device
GB2078792A (en) * 1980-06-27 1982-01-13 Theaker Reginald Yarn Control in Textile Machines
US6131842A (en) * 1998-03-14 2000-10-17 Memminger-Iro Gmbh Yarn feeder with improved yarn travel
WO2003085183A1 (en) * 2002-04-10 2003-10-16 Tiziano Barea Device and method for feeding an elastomeric yarn to a textile machine
US20070210198A1 (en) * 2004-10-21 2007-09-13 Memminger-Iro Gmbh Yarn delivering apparatus having a yarn return operating mode
EP2218670A1 (de) 2009-02-16 2010-08-18 L.G.L. Electronics S.p.A. Fadenliefervorrichtung mit einer leichten Fadenaufwickeltrommel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2503039B1 (de) * 2008-12-30 2013-06-26 L.G.L. Electronics S.p.A. Positiver Garnzuführer mit Spannungsbegrenzer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714494A (en) * 1953-09-23 1955-08-02 Specialties Dev Corp Yarn tension compensating device
US3772869A (en) * 1970-02-27 1973-11-20 Zinser Textilmaschinen Gmbh Twist stopping device
GB2078792A (en) * 1980-06-27 1982-01-13 Theaker Reginald Yarn Control in Textile Machines
US6131842A (en) * 1998-03-14 2000-10-17 Memminger-Iro Gmbh Yarn feeder with improved yarn travel
WO2003085183A1 (en) * 2002-04-10 2003-10-16 Tiziano Barea Device and method for feeding an elastomeric yarn to a textile machine
US20070210198A1 (en) * 2004-10-21 2007-09-13 Memminger-Iro Gmbh Yarn delivering apparatus having a yarn return operating mode
EP2218670A1 (de) 2009-02-16 2010-08-18 L.G.L. Electronics S.p.A. Fadenliefervorrichtung mit einer leichten Fadenaufwickeltrommel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019155346A1 (en) * 2018-02-06 2019-08-15 Btsr International S.P.A. Method and improved yarn feeder system and device for optimising yarn feed to a textile machine operating highly discontinuously or with alternating motion
CN111699144A (zh) * 2018-02-06 2020-09-22 Btsr国际股份公司 用于对高度不连续操作的或具有交替运动的纺织机的纱线进给进行优化的方法及改进的纱线进给器系统和设备
CN111699144B (zh) * 2018-02-06 2022-07-22 Btsr国际股份公司 用于将纱线进给至加工机器的方法、系统及补偿器设备

Also Published As

Publication number Publication date
EP2868608B1 (de) 2016-06-08
CN104555583B (zh) 2018-10-26
CN104555583A (zh) 2015-04-29
ITTO20130875A1 (it) 2015-04-30

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