EP3199680B1 - Dispositif de récupération de fil pour appareils de textile - Google Patents

Dispositif de récupération de fil pour appareils de textile 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
Authority
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
German (de)
English (en)
Other versions
EP3199680A1 (fr
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
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
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Application filed by LGL Electronics SpA filed Critical LGL Electronics SpA
Publication of EP3199680A1 publication Critical patent/EP3199680A1/fr
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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. Dispositif de récupération de fil, comportant un support (14) et une bobine d'enroulement de fil motorisée (18) qui est entraînée en rotation par rapport au support (14) et est délimitée axialement entre une face d'extrémité avant (18a) et une face d'extrémité arrière (18b), caractérisé en ce que ledit support (14) porte d'un seul tenant une première bague de guidage de fil (20) et une seconde bague de guidage de fil (22) qui définissent un trajet rectiligne qui passe en oblique à travers la bobine (18) par rapport à l'axe (A) de celle-ci, et en ce que ladite bobine (18) a au moins un évidement radial (24) qui débouche sur ladite face d'extrémité avant (18a) et est adapté pour être traversé par le fil inséré à travers ladite première bague de guidage de fil (20) et ladite seconde bague de guidage de fil (22), ledit évidement radial (24) coopérant avec lesdites première bague de guidage de fil (20) et seconde bague de guidage de fil (22) afin de permettre au fil d'être récupéré par enroulement sur ladite bobine d'enroulement de fil (18) lorsque cette dernière est amenée à tourner dans un sens.
  2. Dispositif de récupération de fil selon la revendication 1, caractérisé en ce que ladite première bague de guidage de fil (20) et ladite seconde bague de guidage de fil (22) sont agencées de telle sorte que ledit trajet rectiligne défini par elles se situe sur un plan contenant l'axe (A) de la bobine (18).
  3. Dispositif de récupération de fil selon la revendication 1 ou 2, caractérisé en ce que ladite bobine (18) a une pluralité desdits évidements radiaux (24) espacés à angles égaux autour de son axe.
  4. Dispositif de récupération de fil selon la revendication 3, caractérisé en ce que ladite bobine (18) comporte une armature pourvue d'un moyeu (28) et d'une pluralité de rayons (30), à partir des extrémités extérieures desquelles font saillie des bras (32) respectifs qui sont sensiblement parallèles à l'axe du moyeu (28), chacun desdits évidements radiaux (24) étant défini entre deux paires de rayons-bras adjacentes.
  5. Dispositif de récupération de fil selon la revendication 4, caractérisé en ce que lesdits rayons (30) et lesdits bras (32) ont un profil aérodynamique dans le sens de rotation.
  6. Dispositif de récupération de fil selon la revendication 5, caractérisé en ce que lesdits rayons (30) ont un profil de section transversale biconvexe et lesdits bras (32) ont un profil de section transversale qui est convexe sur la face extérieure et est concave sur la face intérieure.
  7. Dispositif de récupération de fil selon l'une des revendications 4 à 6, caractérisé en ce que ladite bobine (18) est moulée à partir d'une matière synthétique (26).
  8. Dispositif de récupération de fil selon l'une des revendications 4 à 7, caractérisé en ce que dans la zone de liaison entre les rayons (30) et les bras (32) correspondants, il y a des saillies (34) respectives adaptées pour retenir le fil enroulé sur la bobine.
  9. Dispositif de récupération de fil selon la revendication 8, caractérisé en ce que lesdites saillies (34) font saillie en oblique vers l'extérieur par rapport à l'axe de la bobine (18) dans la direction opposée par rapport auxdits bras (32).
  10. Dispositif de récupération de fil selon l'une des revendications 4 à 9, caractérisé en ce que les extrémités libres desdits bras (32) sont reliées à un anneau raidisseur (36) qui délimite l'armature (26) sur le côté opposé par rapport à la face d'extrémité avant (18a).
EP17152836.7A 2016-01-26 2017-01-24 Dispositif de récupération de fil pour appareils de textile Active EP3199680B1 (fr)

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 (fr) 2017-08-02
EP3199680B1 true EP3199680B1 (fr) 2020-01-15

Family

ID=55919825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17152836.7A Active EP3199680B1 (fr) 2016-01-26 2017-01-24 Dispositif de récupération de fil pour appareils de textile

Country Status (3)

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

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 (fr) 1998-03-14 2004-06-09 Memminger-IRO GmbH Fournisseur de fil avec une voie de fil ameliorée
EP1741817B1 (fr) 2005-07-07 2009-01-07 L.G.L. Electronics S.p.A. Dispositif de retrait de fil pour machines textiles
EP2218670A1 (fr) 2009-02-16 2010-08-18 L.G.L. Electronics S.p.A. Fournisseur de fil avec un tambour léger d'enroulement de fil
EP2642004A1 (fr) 2012-03-22 2013-09-25 L.G.L. Electronics S.p.A. Procédé de récupération/alimentation en fils pour machines textiles et appareil permettant de mettre en ouvre ce procédé

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 (fr) 1998-03-14 2004-06-09 Memminger-IRO GmbH Fournisseur de fil avec une voie de fil ameliorée
EP1741817B1 (fr) 2005-07-07 2009-01-07 L.G.L. Electronics S.p.A. Dispositif de retrait de fil pour machines textiles
EP2218670A1 (fr) 2009-02-16 2010-08-18 L.G.L. Electronics S.p.A. Fournisseur de fil avec un tambour léger d'enroulement de fil
EP2642004A1 (fr) 2012-03-22 2013-09-25 L.G.L. Electronics S.p.A. Procédé de récupération/alimentation en fils pour machines textiles et appareil permettant de mettre en ouvre ce procédé

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 (fr) 2017-08-02
CN106995973A (zh) 2017-08-01
ITUB20160067A1 (it) 2017-07-26
CN106995973B (zh) 2021-03-16

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