EP3199680B1 - Garnrückgewinnungsvorrichtung für textilvorrichtungen - Google Patents

Garnrückgewinnungsvorrichtung für textilvorrichtungen Download PDF

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Publication number
EP3199680B1
EP3199680B1 EP17152836.7A EP17152836A EP3199680B1 EP 3199680 B1 EP3199680 B1 EP 3199680B1 EP 17152836 A EP17152836 A EP 17152836A EP 3199680 B1 EP3199680 B1 EP 3199680B1
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EP
European Patent Office
Prior art keywords
yarn
recovery device
spool
arms
guiding bush
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.)
Active
Application number
EP17152836.7A
Other languages
English (en)
French (fr)
Other versions
EP3199680A1 (de
Inventor
Pietro Zenoni
Giovanni Pedrini
Rosario Castelli
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
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LGL Electronics SpA
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Publication date
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Application filed by LGL Electronics SpA filed Critical LGL Electronics SpA
Publication of EP3199680A1 publication Critical patent/EP3199680A1/de
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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
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • 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
    • 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
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • D04B15/484—Yarn braking means acting on the drum
    • 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

Definitions

  • the present invention relates to a yarn recovery device for textile apparatuses.
  • Yarn recovery devices which are adapted to be positioned upstream of a generic textile machine in order to recover part of the yarn that was previously dispensed to the machine and then return it at a later time.
  • EP1741817B1 in the name of this same Applicant discloses a recovery device provided with a motorized rotary reel capable of winding thereon the yarn to be recovered.
  • the reel has a continuous cylindrical outer surface.
  • the yarn passes through a channel that extends obliquely from the outer surface of the reel to a front surface thereof.
  • EP2642004A1 also in the name of this same Applicant, also discloses a yarn recovery device having a reel with a continuous cylindrical outer surface.
  • the aim of the present invention is to provide a yarn recovery device that, although based on a principle of operation that is mechanically similar to that of the rotary reel device mentioned above, has a structure that can increase the operating reaction speed thereof.
  • a yarn recovery device 10 is adapted to be arranged along a yarn feeding line for the purpose of recovering part of the yarn that was previously dispensed to a generic textile machine downstream, e.g., a knitting machine, or a frame, and then return it at a later time.
  • the yarn recovery device 10 can be arranged between a yarn feeder (e.g., a storage yarn feeder or a rotary reel yarn feeder) and the textile machine, or also upstream of the yarn feeder.
  • the yarn recovery device 10 comprises a motor 12 accommodated in a support 14 and is provided with a driving shaft 16 ( Figure 2 ).
  • a spool 18 is keyed on the driving shaft 16 and can be actuated in order to recover part of the yarn that was previously dispensed to the machine downstream, by winding it thereon.
  • the spool 18 is delimited axially between a front end face 18a and a rear end face 18b which faces the motor 12.
  • the support 14 carries integrally a first yarn guiding bush 20 and a second yarn guiding bush 22 which define a straight path that passes obliquely through the spool 18 with respect to the axis A thereof, and the spool 18 is provided with a plurality of radial recesses 24 that open on the front end face 18a and are adapted to be passed through by the yarn inserted through the first yarn guiding bush 20 and the second yarn guiding bush 22.
  • the first yarn guiding bush 20 and the second yarn guiding bush 22 are arranged so that the path defined by them lies on a plane containing the axis A of the spool 18.
  • the first yarn guiding bush 20 and the second yarn guiding bush 22 are interconnected by a bridge 25.
  • a spool 18 is used which is known per se, since it is used in positive yarn feeders such as that disclosed in EP 2218670 in the name of this same Applicant.
  • the spool 18 comprises a frame molded from synthetic material, preferably a thermoplastic material like nylon with the addition of carbon fibers.
  • the frame has a hub 28 and a plurality of spokes 30 that are angularly equally spaced apart and extend radially outward from the hub 28.
  • the spokes 30 have an aerodynamic profile in the direction of rotation.
  • Respective arms 32 protrude from the outer ends of the spokes 30 and are substantially parallel to the axis of the hub 28.
  • the arms 32 also advantageously have aerodynamic profile in the direction of rotation.
  • the spokes 30 have a biconvex cross-sectional profile, while the arms 32 have a cross-sectional profile that is convex on the outer face of the arm and is slightly concave on the inner face.
  • Each one of the radial recesses 24 that can be passed through by the yarn is therefore defined between two adjacent spoke-arm pairs.
  • a protrusion 34 is defined in the connection region between the spoke 30 and the respective arm 32.
  • the protrusion 34 extends obliquely outward with respect to the axis of the spool 18 in the opposite direction to the arms 32.
  • the free ends of the arms 32 are connected to a stiffening ring 36 which delimits the frame 26 on the side of the rear end face 18b.
  • the stiffening ring 36 is also made of thermoplastic material like nylon with the addition of carbon fibers.
  • the spool 18 is keyed to the driving shaft 16 with the interposition of a co-molded bushing insert 44 inserted in the hub 28.
  • the bushing insert 44 is preferably made of aluminum, and makes it possible to clamp the spool 18 on the shaft 16 with force without the spool being deformed.
  • the recovery device 10 When not in use, the recovery device 10 is in the active configuration shown in Figures 1 and 2 , with the yarn F being able without interference to travel a straight path that passes through the first yarn guiding bush 20, one of the radial recesses 24 defined between two adjacent spoke-arm pairs, and the second yarn guiding bush 22.
  • the spool 18 is made to rotate in one direction, as illustrated in Figure 3 .
  • the spool 18 is made to rotate in the opposite direction until it returns to the inactive position shown in Figures 1 and 2 .
  • the spool 18 according to the invention has a high structural rigidity, a low inertia, and a low aerodynamic resistance by virtue of the aerodynamic profile of the spokes 30 and of the arms 32. Such fact, as the skilled person will easily grasp, favors the speed of reaction of the yarn recovery device to operating commands.
  • the purpose of the protrusions 34 is to prevent the yarn loops wound on the spool 18 from falling during the step of recovering or returning the yarn.
  • the spool described above which is known per se from yarn feeder devices is particularly advantageous.
  • a specially-designed spool could also be provided, as long as it has at least one radial recess that opens on the front end face, which cooperates with the two fixed bushes in the manner described above in order to allow the winding of the yarn.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (10)

  1. Eine Garnrückgewinnungsvorrichtung, die einen Träger (14) und eine motorisierte Garnwickelspule (18) umfasst, die in Rotation mit Bezug auf den Träger (14) mitgeführt wird und axial durch eine vordere Endfläche (18a) und eine hintere Endfläche (18b) begrenzt ist; dadurch gekennzeichnet, dass der Träger (14) integral eine erste Garnführungsbuchse (20) und eine zweite Garnführungsbuchse (22) trägt, die einen geraden Pfad bestimmen, welcher schräg durch die Spule (18) mit Bezug auf die Achse (A) derselben verläuft; und dadurch, dass die Spule (18) mindestens eine radiale Vertiefung (24) hat, die sich zu der vorderen Endfläche (18a) hin öffnet und ausgebildet ist, um von dem Garn durchquert zu werden, das durch die erste Garnführungsbuchse (20) und die zweite Garnführungsbuchse (22) eingeführt wird; wobei die radiale Vertiefung (24) mit der ersten Garnführungsbuchse (20) und der zweiten Garnführungsbuchse (22) zusammenwirkt, um die Rückgewinnung des Garns durch Aufwickeln auf die Garnwickelspule (18) zu ermöglichen, wenn Letztere in eine Richtung zum Drehen gebracht wird.
  2. Die Garnrückgewinnungsvorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass die erste Garnführungsbuchse (20) und die zweite Garnführungsbuchse (22) so angeordnet sind, dass der durch sie bestimmte gerade Pfad auf einer Ebene liegt, die die Achse (A) der Spule (18) enthält.
  3. Die Garnrückgewinnungsvorrichtung gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Spule (18) eine Vielzahl der radialen Vertiefungen (24), in gleichen Winkeln um ihre Achse beabstandet, hat.
  4. Die Garnrückgewinnungsvorrichtung gemäß Anspruch 3, dadurch gekennzeichnet, dass die Spule (18) einen Rahmen umfasst, der mit einer Nabe (28) und einer Vielzahl von Speichen (30) ausgestattet ist, von deren äußeren Enden entsprechende Arme (32) abstehen, die im Wesentlichen parallel zur Achse der Nabe (28) sind, wobei jede der radialen Vertiefungen (24) zwischen zwei benachbarten Speiche-Arm-Paaren bestimmt ist.
  5. Die Garnrückgewinnungsvorrichtung gemäß Anspruch 4, dadurch gekennzeichnet, dass die Speichen (30) und die Arme (32) in Rotationsrichtung ein aerodynamisches Profil haben.
  6. Die Garnrückgewinnungsvorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass die Speichen (30) ein bikonvexes Querschnittsprofil haben und die Arme (32) ein Querschnittsprofil haben, das an der Außenfläche konvex und an der Innenfläche konkav ist.
  7. Die Garnrückgewinnungsvorrichtung gemäß einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Spule (18) aus synthetischem Material (26) geformt ist.
  8. Die Garnrückgewinnungsvorrichtung gemäß einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass sich im Verbindungsbereich zwischen den Speichen (30) und den dazugehörigen Armen (32) entsprechende Vorsprünge (34) befinden, die ausgebildet sind, um das auf die Spule aufgewickelte Garn zu halten.
  9. Die Garnrückgewinnungsvorrichtung gemäß Anspruch 8, dadurch gekennzeichnet, dass die Vorsprünge (34) mit Bezug auf die Achse der Spule (18) schräg nach außen ragen, in die den Armen (32) entgegengesetzte Richtung.
  10. Die Garnrückgewinnungsvorrichtung gemäß einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass die freien Enden der Arme (32) mit einem Versteifungsring (36) verbunden sind, der den Rahmen (26) auf der Seite, die der vorderen Endfläche (18a) gegenüberliegt, begrenzt.
EP17152836.7A 2016-01-26 2017-01-24 Garnrückgewinnungsvorrichtung für textilvorrichtungen Active EP3199680B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB2016A000067A ITUB20160067A1 (it) 2016-01-26 2016-01-26 Dispositivo di recupero di filato per apparati tessili.

Publications (2)

Publication Number Publication Date
EP3199680A1 EP3199680A1 (de) 2017-08-02
EP3199680B1 true EP3199680B1 (de) 2020-01-15

Family

ID=55919825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17152836.7A Active EP3199680B1 (de) 2016-01-26 2017-01-24 Garnrückgewinnungsvorrichtung für textilvorrichtungen

Country Status (3)

Country Link
EP (1) EP3199680B1 (de)
CN (1) CN106995973B (de)
IT (1) ITUB20160067A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111893632A (zh) * 2020-08-06 2020-11-06 郑素花 一种纺织机械导纱器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158107A (en) 1984-05-02 1985-11-06 Gustav Memminger Yarn feeding apparatus for yarn-processing textile machines such as circular knitting machines
EP0943571B1 (de) 1998-03-14 2004-06-09 Memminger-IRO GmbH Fadenliefergerät mit verbessertem Fadenlauf
EP1741817B1 (de) 2005-07-07 2009-01-07 L.G.L. Electronics S.p.A. Faden-Rückzugsvorrichtung für Textilmaschinen
EP2218670A1 (de) 2009-02-16 2010-08-18 L.G.L. Electronics S.p.A. Fadenliefervorrichtung mit einer leichten Fadenaufwickeltrommel
EP2642004A1 (de) 2012-03-22 2013-09-25 L.G.L. Electronics S.p.A. Garnzuführungs-/-rückgewinnungsverfahren für Textilmaschinen, und Vorrichtung zur Durchführung eines solchen Verfahrens

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1003084B (zh) * 1985-04-23 1989-01-18 古斯塔夫·梅明格 针织圆机用的喂纱装置
ITTO20120805A1 (it) * 2012-09-17 2014-03-18 Lgl Electronics Spa Alimentatore di filato a tamburo rotante per lavorazioni tessili con selezione del filato.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158107A (en) 1984-05-02 1985-11-06 Gustav Memminger Yarn feeding apparatus for yarn-processing textile machines such as circular knitting machines
EP0943571B1 (de) 1998-03-14 2004-06-09 Memminger-IRO GmbH Fadenliefergerät mit verbessertem Fadenlauf
EP1741817B1 (de) 2005-07-07 2009-01-07 L.G.L. Electronics S.p.A. Faden-Rückzugsvorrichtung für Textilmaschinen
EP2218670A1 (de) 2009-02-16 2010-08-18 L.G.L. Electronics S.p.A. Fadenliefervorrichtung mit einer leichten Fadenaufwickeltrommel
EP2642004A1 (de) 2012-03-22 2013-09-25 L.G.L. Electronics S.p.A. Garnzuführungs-/-rückgewinnungsverfahren für Textilmaschinen, und Vorrichtung zur Durchführung eines solchen Verfahrens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"EFS 800", ORIGINALBETRIEBSANLEITUNG 006-920-009, 5 August 2015 (2015-08-05), XP055745682

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111893632A (zh) * 2020-08-06 2020-11-06 郑素花 一种纺织机械导纱器
CN111893632B (zh) * 2020-08-06 2021-08-31 温州市花为媒花边织带有限公司 一种纺织机械导纱器

Also Published As

Publication number Publication date
EP3199680A1 (de) 2017-08-02
CN106995973A (zh) 2017-08-01
ITUB20160067A1 (it) 2017-07-26
CN106995973B (zh) 2021-03-16

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