EP2014809B1 - Schussfadenliefervorrichtung für Textilmaschinen mit einer Fadenbremsvorrichtung - Google Patents

Schussfadenliefervorrichtung für Textilmaschinen mit einer Fadenbremsvorrichtung Download PDF

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Publication number
EP2014809B1
EP2014809B1 EP20070425433 EP07425433A EP2014809B1 EP 2014809 B1 EP2014809 B1 EP 2014809B1 EP 20070425433 EP20070425433 EP 20070425433 EP 07425433 A EP07425433 A EP 07425433A EP 2014809 B1 EP2014809 B1 EP 2014809B1
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EP
European Patent Office
Prior art keywords
tension
drum
seb
sib
braking
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Active
Application number
EP20070425433
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English (en)
French (fr)
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EP2014809A1 (de
Inventor
Pietro Zenoni
Luca Gotti
Rosario Castelli
Ruggero Magoni
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LGL Electronics SpA
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LGL Electronics SpA
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Publication date
Application filed by LGL Electronics SpA filed Critical LGL Electronics SpA
Priority to EP20070425433 priority Critical patent/EP2014809B1/de
Priority to DE200760004475 priority patent/DE602007004475D1/de
Priority to CN 200810131545 priority patent/CN101343002B/zh
Publication of EP2014809A1 publication Critical patent/EP2014809A1/de
Application granted granted Critical
Publication of EP2014809B1 publication Critical patent/EP2014809B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/364—Yarn braking means acting on the drum
    • D03D47/366—Conical

Definitions

  • weft feeders for textile machines comprise a stationary drum on which a motorized swivel arm winds a plurality of yarn loops forming a weft reserve.
  • the loops are unwound from the drum, then pass through a weft braking device which controls the tension of the yarn in order to maintain it substantially constant, and finally are fed to the loom.
  • the weft-braking device typically comprises a frustoconical hollow member which is coaxially supported with its larger base facing the drum, and is biased with its inner surface against the delivery edge of the drum from which the loops are unwound. Therefore, the unwinding yarn runs between the drum and the frustoconical member, which applies a braking action upon the yarn.
  • the braking unit is fixed to a slide that is arranged to slide in a longitudinal direction and is manually positionable at a fixed position in order to set the static pre-load with which the frustoconical member is biased against the drum.
  • a weft feeder 10 for textile machines comprises a stationary drum 12 on which a motorized swivel arm 14 driven by a motor 16 winds a plurality of loops of yarn F forming a weft reserve or stock RT.
  • yarn F is unwound from drum 12 and is fed to the loom.
  • a stationary arm 17 lying parallel to the axis of drum 12 supports a weft-braking device 18 at its free end, having the aim of controlling the tension of the unwinding yarn in order to maintain it substantially constant.
  • Weft-braking device 18 comprises a pair of linear electric actuators 20, 21 which are driven by a control unit CU ( Fig. 3 ) via respective driving blocks R1, R2 and are supported by a slide 22, with their operating rods lying parallel to the axis of drum 12 at diametrically opposed positions.
  • the slide is slidable along stationary drum 17 under control of a worm-screw mechanism 23 operatable by a knob 24.
  • Linear actuators 20, 21 each incorporate a respective position sensor S1, S2 ( Fig. 3 ) connected to send a position signal to control unit CU.
  • An annular support 30 coaxial to the drum is attached to the free ends of the operating rods, and is provided with radial anchor projections 31.
  • a frustoconical hollow member 32 is coaxially supported with its larger base 32a facing the drum, and is biased with its inner surface against the delivery edge of drum 12, by a spider assembly of springs 34 each having one end anchored to a respective projection 31 of annular support 30, and the opposite end anchored to a ring 36 attached to the smaller base 32b of the frustoconical member.
  • the frustoconical member can be made, e.g., of a metal sheet or synthetic or laminated fabric impregnated with a polimeric resin.
  • a yarn tension sensor 38 of a conventional type is supported downstream of weft-braking device 18 in order to measure the tension of the yarn delivered from the feeder.
  • Sensor 38 is connected to send a measured tension signal Tm to control unit CU, which is programmed to compare the measured tension signal Tm with a reference tension signal Tr and to drive linear actuators 20, 21 in such a way as to minimize the difference between them.
  • Reference tension Tr is preset depending on various parameters, such as the angular position of the machine, whereby different reference tensions may correspond to different angular positions.
  • Yarn F is unwound from drum 12 and runs between the delivery edge of the drum and frustoconical member 32, which applies the desired braking action upon the yarn.
  • knob 24 the preload is adjusted with which the frustoconical member is biased against the drum at rest.
  • control unit CU is programmed to generate a poor braking signal Sib which enables a visual device VD (which is only diagrammatically shown in Fig. 3 ), such as a display or a pilot light, which provides the user with the information that knob 24 should be rotated such as to increase the preload with which frustoconical member 32 is biased against drum 12, whereby the weft braking device will operate with a higher average level of braking forces.
  • VD which is only diagrammatically shown in Fig. 3
  • a visual device VD which is only diagrammatically shown in Fig. 3
  • knob 24 which provides the user with the information that knob 24 should be rotated such as to increase the preload with which frustoconical member 32 is biased against drum 12, whereby the weft braking device will operate with a higher average level of braking forces.
  • control unit CU is programmed to generate an excessive braking signal Seb which enables visual device VD such as to provide the user with the information that knob 24 should be rotated such as to reduce the preload of the springs, whereby the weft braking device will operate with a lower average level of braking forces.
  • control unit CU is programmed to generate an excessive braking signal Seb' which enables motor M such as to reduce the preload, whereby the weft braking device will operate with a lower average level of braking forces.
  • the position-correcting means which in the first embodiment were passive and consisted of a visual device adapted to inform the user that the slide had to be manually moved in order to change the pre-load applied by the braking member upon the drum, are now active and operate in an automatized way to change the preload in view of the poor braking signal or of the excessive braking signal.
  • the frustoconical braking member may be replaced by a different hollow braking member having a circular profile, e.g., a member consisting of bristles or of a plurality of blades, and the spider assembly of springs 34 could be unnecessary if the material of the braking member is sufficiently elastic.
  • the worm-screw mechanism which drives the slide could be provided of both a knob and a motor, and the pilot light or display could be provided even in presence of the motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (5)

  1. Schussfadenzuführer für Textilmaschinen, mit einer fadenspeichernden Trommel (12), von der ein Faden (F) zum Speisen einer Textilmaschine abgewickelt wird, und einer Schussfadenbremseinrichtung (18), die an einem entlang einer Richtung parallel zur Achse der Trommel (12) beweglichen Schlitten (22) angebracht und ausgestattet ist mit:
    - einem hohlen Bremsbauteil (32) mit einem kreisförmigen Profil, das mit seiner Innenseite durch eine Aktuatoreinrichtung (20, 21) koaxial gegen den Abgaberand der Trommel (12) gedrängt wird, um den sich abwickelnden Faden abzubremsen,
    - einem Fadenspannungssensor (38), der ein gemessenes, die Spannung des von der Trommel abgegebenen Fadens angebendes Spannungssignal (Tm) erzeugt,
    - einer Steuerungseinheit (CU), die dazu programmiert ist, das gemessene Spannungssignal (Tm) mit einem Bezugsspannungssignal (Tr) zu vergleichen und die Aktuatoreinrichtung (20, 21) derart anzutreiben, dass der Unterschied zwischen der gemessenen Spannung und der Bezugsspannung minimiert wird,
    dadurch gekennzeichnet, dass die Steuerungseinheit (CU) dazu programmiert ist, ein Signal (Sib, Sib') für schwache Bremsleistung zu erzeugen, wenn die Bezugsspannung (Tr) höher ist als die mit der Aktuatoreinrichtung in einer Hubendstellung erreichbare Maximalspannung, und ein Signal (Seb, Seb') für übermäßige Bremsleistung zu erzeugen, wenn die Bezugsspannung (Tr) geringer ist als die mit der Aktuatoreinrichtung in einer Hubendstellung erreichbare Minimalspannung, und dass sie Mittel zum Korrigieren der Stellung (VD, M) des Schlittens (22, 23) aufweist, die durch das Signal (Sib, Sib') für schwache Bremsleistung und das Signal (Seb, Seb'), für übermäßige Bremsleistung aktiviert werden.
  2. Schussfadenzuführer nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel zum Korrigieren der Stellung eine optische Einrichtung (VD) umfassen, die einen Benutzer darüber zu informieren vermag, dass der Schlitten (23, 23) bewegt werde sollte, um die Vorspannung zu ändern, mit der das Bremsbauteil (32) gegen die Trommel (12) gedrängt wird, wenn das Signal (Sib, Sib') für schwache Bremsleistung und das Signal (Seb, Seb') für übermäßige Bremsleistung vorhanden sind.
  3. Schussfadenzuführer nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Mittel zum Korrigieren der Stellung einen Motor (M) umfassen, der betriebsfähig mit dem Schlitten (22) verbunden und von der Steuerungseinheit (CU) so gesteuert ist, dass die von dem Bremsbauteil (32) auf die Trommel (12) ausgeübte Vorspannung erhöht wird, wenn das Signal (Sib, Sib') für schwache Bremsleistung erzeugt wird, wohingegen die Vorspannung vermindert wird, wenn das Signal (Seb, Seb') für übermäßige Bremsleistung erzeugt wird.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Schlitten (22) durch einen mittels eines Knopfes (24) betreibbaren Schneckenmechanismus (23) angetrieben ist.
  5. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Schlitten (22) durch einen mittels des Motors (M) betreibbaren Schneckenmechanismus (23) angetrieben ist.
EP20070425433 2007-07-13 2007-07-13 Schussfadenliefervorrichtung für Textilmaschinen mit einer Fadenbremsvorrichtung Active EP2014809B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20070425433 EP2014809B1 (de) 2007-07-13 2007-07-13 Schussfadenliefervorrichtung für Textilmaschinen mit einer Fadenbremsvorrichtung
DE200760004475 DE602007004475D1 (de) 2007-07-13 2007-07-13 Schussfadenliefervorrichtung für Textilmaschinen mit einer Fadenbremsvorrichtung
CN 200810131545 CN101343002B (zh) 2007-07-13 2008-07-11 用于织机的带有纬线制动装置的纬线馈送器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070425433 EP2014809B1 (de) 2007-07-13 2007-07-13 Schussfadenliefervorrichtung für Textilmaschinen mit einer Fadenbremsvorrichtung

Publications (2)

Publication Number Publication Date
EP2014809A1 EP2014809A1 (de) 2009-01-14
EP2014809B1 true EP2014809B1 (de) 2010-01-20

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EP20070425433 Active EP2014809B1 (de) 2007-07-13 2007-07-13 Schussfadenliefervorrichtung für Textilmaschinen mit einer Fadenbremsvorrichtung

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EP (1) EP2014809B1 (de)
CN (1) CN101343002B (de)
DE (1) DE602007004475D1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1019590A3 (nl) * 2011-06-20 2012-08-07 Wiele Michel Van De Nv Garenopslaginrichting voor een textielmachine.
ITTO20110840A1 (it) * 2011-09-20 2013-03-21 Lgl Electronics Spa Metodo di taratura di alimentatori di filato a tensione controllata su linee di tessitura.
ITTO20110977A1 (it) * 2011-10-27 2013-04-28 Lgl Electronics Spa "metodo e dispositivo per l'apertura e successiva chiusura di un freno di trama in un alimentatore di filato"
ITMI20111983A1 (it) 2011-11-02 2013-05-03 Btsr Int Spa Dispositivo alimentatore positivo per alimentare a tensione costante fili metallici
ITMI20112091A1 (it) 2011-11-17 2013-05-18 Btsr Int Spa Alimentatore di filo, del tipo ad accumulo e con freno magnetico
ITMI20112267A1 (it) 2011-12-15 2013-06-16 Btsr Int Spa Dispositivo di alimentazione di filo ad una macchina tessile
ITMI20112369A1 (it) 2011-12-23 2013-06-24 Btsr Int Spa Metodo e dispositivo ad accumulo di filato per alimentare un filo senza creare torsioni dello stesso
ITMI20112414A1 (it) 2011-12-28 2013-06-29 Btsr Int Spa Sistema e metodo perfezionati per alimentare a tensione costante fili metallici
EP2924156B1 (de) * 2014-03-28 2016-11-23 L.G.L. Electronics S.p.A. Garnbremsvorrichtung für Speicherfournisseur
DE102014118743B4 (de) 2014-12-16 2023-12-21 Memminger-Iro Gmbh Verfahren zur Steuerung der Fadenlieferung eines Fadenliefergerät und Fadenliefergerät
ITUB20152769A1 (it) 2015-08-03 2017-02-03 Btsr Int Spa Alimentatore di filo ad accumulo con organo frenante e elementi intercambiabili
DE102015118027B3 (de) * 2015-10-22 2016-11-17 Memminger-Iro Gmbh Verfahren zur Steuerung der Fadenlieferung eines Fadenliefergerät und Fadenliefergerät
DE102015120264B3 (de) * 2015-11-23 2016-12-29 Memminger-Iro Gmbh Verfahren zur Steuerung der Fadenlieferung mindestens eines Fadenliefergerätes und Textilmaschine mit einem System mit mindestens einem Fadenliefergerät
CN110997998B (zh) * 2017-08-08 2022-10-04 范德威尔瑞典公司 可调式纱线制动器
CN109626126B (zh) * 2019-01-22 2020-10-16 江苏恒力化纤股份有限公司 一种通过测试长丝张力以控制丝卷卷绕超喂率的方法

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Publication number Priority date Publication date Assignee Title
US3112899A (en) * 1961-07-21 1963-12-03 Essex Wire Corp Wire-unwinding device
DE9406102U1 (de) * 1994-04-13 1995-08-10 Sobrevin Société de brevets industriels-Etablissement, Vaduz Fadenspeicher mit Fadenabzugsbremse
IT1268111B1 (it) * 1994-10-10 1997-02-20 Lgl Electronics Spa Dispositivo di frenatura modulata positiva del filato, per apparecchi alimentatori di trama
IT1295624B1 (it) * 1997-10-15 1999-05-24 Roj Electrotex Nuova Srl Dispositivo di frenatura per filati in alimentatori di trama ed elemento frenante per detto dispositivo
IT1308067B1 (it) * 1999-06-01 2001-11-29 Lgl Electronics Spa Dispositivo di frenatura del filato, per alimentatore di trama,avente tempi di intervento ridotti

Also Published As

Publication number Publication date
CN101343002B (zh) 2012-09-26
DE602007004475D1 (de) 2010-03-11
CN101343002A (zh) 2009-01-14
EP2014809A1 (de) 2009-01-14

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