EP2169099A1 - Dispositif d'alimentation négative de fils avec un dispositif de freinage de trame - Google Patents

Dispositif d'alimentation négative de fils avec un dispositif de freinage de trame Download PDF

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Publication number
EP2169099A1
EP2169099A1 EP08425630A EP08425630A EP2169099A1 EP 2169099 A1 EP2169099 A1 EP 2169099A1 EP 08425630 A EP08425630 A EP 08425630A EP 08425630 A EP08425630 A EP 08425630A EP 2169099 A1 EP2169099 A1 EP 2169099A1
Authority
EP
European Patent Office
Prior art keywords
drum
yarn
weft
negative
yarn feeder
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.)
Withdrawn
Application number
EP08425630A
Other languages
German (de)
English (en)
Inventor
Giovanni Pedrini
Ruggero Magoni
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
Priority to EP08425630A priority Critical patent/EP2169099A1/fr
Priority to US12/585,592 priority patent/US20100071799A1/en
Priority to CN200910175743A priority patent/CN101713117A/zh
Publication of EP2169099A1 publication Critical patent/EP2169099A1/fr
Withdrawn legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/22—Guides for filamentary materials; Supports therefor adapted to prevent excessive ballooning of material
    • 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
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • 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
    • D03D47/365—Brushes
    • 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

Definitions

  • the present invention relates to a negative yarn feeder provided with a weft-braking device for locking the unwinding loops of yarn at the final step of the insertion of the yarn into the loom, which step is particularly critical in the case of projectile looms.
  • the so-called "negative" yarn feeders comprise a stationary drum on which a motorized flywheel winds a plurality of yarn loops forming a weft reserve. Upon request from the loom, the loops are unwound from the drum, then pass through a device for controlling the tension of the yarn, and finally are fed to the loom.
  • the yarn feeders of the above type have the essential aim of maintaining the amount of loops substantially constant on the drum, thereby minimizing the tension of the yarn coming from the drum.
  • the yarn feeder is generally provided with an "anti-balloon" device, which essentially consists of a funnel having the aim of containing the balloon which forms while the yarn is unwound from the feeder.
  • an anti-balloon device which essentially consists of a funnel having the aim of containing the balloon which forms while the yarn is unwound from the feeder.
  • Devices of this type are disclosed, e.g., in EP0719354 , EP1094138 , and EP1149793 .
  • the anti-balloon funnel has a frustoconical profile defmed by a plurality of equally-spaced rods arranged along the generatrices of a frustum of cone, whereby the deposit of dust and the friction against the inner surface of the funnel are reduced.
  • a drawback of the above device is that the brushes also brake the yarn during the insertion, when no braking action is required but, on the contrary, the yarn should run as freely as possible. This circumstance affects the smoothness of the yarn-feeding process and leads to a growth of dust generating by friction between the yarn and the brushes, which dust is liable to deposit within the funnel thereby affecting its operation.
  • a negative yarn feeder 10 comprises a stationary drum 12 and a swivel flywheel 14 which is coaxially supported at one end of drum 12 and is driven by a motor 15 for winding loops of yarn F on the drum, thereby forming a stock S.
  • Yam F is unwound from drum 12 upon request from the loom, which in the present invention is preferably a projectile loom (not shown).
  • a stationary drum 16 longitudinally projects from the motor housing and supports an anti-balloon funnel 18.
  • Anti-balloon funnel 18 consists of a plurality of equally-spaced rods 20 which are arranged along the generatrices of a frustum of cone and have one end attached to a smaller ring 22 defining the smaller base of the frustum of cone, and the opposite end attached to a larger ring 24 defining the larger base of the frustum of cone.
  • a yarn-guide delivery eyelet 25 is arranged at the delivery end of the anti-balloon funnel.
  • Funnel 18 is coaxially arranged in front of drum 12 with its larger base facing the delivery end 12a of the drum.
  • the inner surfaces of both smaller ring 22 and larger ring 24 are bevelled, and the innermost circumference of larger ring 24 advantageously has a diameter Da smaller than the yarn-winding diameter Dt of drum 12 ( Fig. 3 ).
  • Funnel 18 is attached to a slide 26 ( Fig. 4 ) which is slidable along stationary drum 16 under control of a screw mechanism (not shown) operable by a knob 28, whereby the axial gap between anti-balloon funnel 18 and drum 12 may be changed.
  • the gap L between the larger base of anti-balloon funnel 18 and the delivery end 12a of the drum may be minimized as a function of the yarn count.
  • An annular support 30 surrounding drum 12 near its delivery end 12a is attached to stationary drum 16 and holds a pair of movable braking members at diametrally opposite positions ( Fig. 5 ).
  • Each braking member consists of an angular sector of a blistle brush (below, brush 34) which is anchored to the operating rod 36 of a linear, electro-magnetic actuator 37 driven by a microprocessor (not shown).
  • the microprocessor which controls the actuators also controls the feeder or the loom.
  • Brush 34 is movable between a resting position spaced from the drum, in which it is received in a respective seat 38 of annular support 30 so that it does not interfere with the unwinding yarn, and an operative position, in which it juts out of seat 38 and engages the outer surface of the drum with the tips of its bristles.
  • the microprocessor is programmed for activating the brushes at a predetermined instant, e.g., as a function of the position degrees of the loom. Programming the times of intervention of the brushes falls within the normal knowledge of the person skilled in the art, therefore no further description will be given about it.
  • the brushes 34 are received in the respective seats 38 and do not interfere with the yarn, which consequently may be freely unwound from the drum without coming into contact with them.
  • Funnel 18 adjusted as above prevents the formation of the balloon.
  • the microprocessor enables the brushes. The latter engage the outer surface of the drum with their tips, brake the unwinding yarn (which yarn runs between the brushes and the outer surface of the drum) by friction, and finally lock it, thereby preventing loops in excess from unwinding from the drum by inertia.
  • the braking action is applied only when required, i.e., at the end of the insertion. Therefore, a smooth insertion is obtained and the formation of dust is limited.
  • the above-described embodiment is only provided with two braking brushes held by the annular support at diametrally opposite positions, of course a higher number of brushes may be installed, e.g., three or four brushes spaced at equal angles; on the contrary, in certain cases a sole brush could be sufficient.
  • the brushes can be operated by conventional actuators of a different type, e.g., electrical actuators.
EP08425630A 2008-09-25 2008-09-25 Dispositif d'alimentation négative de fils avec un dispositif de freinage de trame Withdrawn EP2169099A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08425630A EP2169099A1 (fr) 2008-09-25 2008-09-25 Dispositif d'alimentation négative de fils avec un dispositif de freinage de trame
US12/585,592 US20100071799A1 (en) 2008-09-25 2009-09-18 Negative yarn feeder with weft-braking device
CN200910175743A CN101713117A (zh) 2008-09-25 2009-09-24 具有纬线制动装置的消极式纱线馈送器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08425630A EP2169099A1 (fr) 2008-09-25 2008-09-25 Dispositif d'alimentation négative de fils avec un dispositif de freinage de trame

Publications (1)

Publication Number Publication Date
EP2169099A1 true EP2169099A1 (fr) 2010-03-31

Family

ID=40343512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08425630A Withdrawn EP2169099A1 (fr) 2008-09-25 2008-09-25 Dispositif d'alimentation négative de fils avec un dispositif de freinage de trame

Country Status (3)

Country Link
US (1) US20100071799A1 (fr)
EP (1) EP2169099A1 (fr)
CN (1) CN101713117A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102453989A (zh) * 2010-10-18 2012-05-16 吴江市浪潮纺织有限公司 织机循环导线装置
ITTO20111217A1 (it) * 2011-12-28 2013-06-29 Lgl Electronics Spa Dispositivo frena-trama per alimentatori di filato a tamburo fisso
ITTO20120156A1 (it) * 2012-02-22 2013-08-23 Lgl Electronics Spa Apparato di alimentazione di filato a tensione controllata per macchine tessili, con funzione di recupero del filato.
ITTO20130017A1 (it) * 2013-01-10 2014-07-11 Lgl Electronics Spa Gruppo di alimentazione di filato per macchine tessili.
JP6202648B1 (ja) 2016-07-15 2017-09-27 Ｎｅｃプラットフォームズ株式会社 ロール紙プリンタ
DE102016117506B3 (de) * 2016-09-16 2017-11-23 Memminger-Iro Gmbh Fadenliefergerät
DE102017128327B3 (de) * 2017-11-29 2019-01-10 Memminger-Iro Gmbh Verfahren zur Steuerung der Lieferung von Fäden eines Systems mit mehreren Fadenliefergeräten und Textilmaschine mit einem System mit mehreren Fadenliefergeräten
DE102018115604A1 (de) * 2018-06-28 2020-01-02 Memminger-Iro Gmbh Fadenliefergerät
CN111648006A (zh) * 2020-06-11 2020-09-11 贾数珍 一种基于重力感应的纺织机定量储纱装置
USD1026049S1 (en) * 2022-09-30 2024-05-07 Btsr International S.P.A. Yarn feeder

Citations (9)

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Publication number Priority date Publication date Assignee Title
GB1116486A (en) * 1965-10-05 1968-06-06 Sulzer Ag Looms
US3834635A (en) 1972-04-28 1974-09-10 Sulzer Ag Method and apparatus for braking filamentary material unwound from a package
EP0436197A2 (fr) * 1989-12-29 1991-07-10 ROJ ELECTROTEX S.p.A. Fournisseur de trame pour métiers à jet de fluide
US5462096A (en) * 1991-08-22 1995-10-31 Iro Ab Measuring weft feeder with yarn clamping action
EP0707102A2 (fr) * 1994-10-10 1996-04-17 L.G.L. ELECTRONICS S.p.A. Frein de fil positif modulé pour fournisseurs de trame
EP0719354A1 (fr) 1993-09-15 1996-07-03 Iro Ab Metier a tisser a projectiles ou a navettes a pince et appareillage d'alimentation
US5778943A (en) * 1994-01-26 1998-07-14 Iro Ab Controllable output brake, thread feed device as well as projectile or gripper weaving machine
EP1094138A1 (fr) 1999-10-22 2001-04-25 L.G.L. Electronics S.p.A. Dispositif anti-ballon pour les fournisseurs de trame de métiers à tisser
EP1149793A2 (fr) 2000-04-28 2001-10-31 L.G.L. Electronics S.p.A. Dispositif anti-ballon pour fournisseurs de trame de métiers à tisser, plus particulièrement de métiers à tisser à jet d'air

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Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1116486A (en) * 1965-10-05 1968-06-06 Sulzer Ag Looms
US3834635A (en) 1972-04-28 1974-09-10 Sulzer Ag Method and apparatus for braking filamentary material unwound from a package
EP0436197A2 (fr) * 1989-12-29 1991-07-10 ROJ ELECTROTEX S.p.A. Fournisseur de trame pour métiers à jet de fluide
US5462096A (en) * 1991-08-22 1995-10-31 Iro Ab Measuring weft feeder with yarn clamping action
EP0719354A1 (fr) 1993-09-15 1996-07-03 Iro Ab Metier a tisser a projectiles ou a navettes a pince et appareillage d'alimentation
US5778943A (en) * 1994-01-26 1998-07-14 Iro Ab Controllable output brake, thread feed device as well as projectile or gripper weaving machine
EP0707102A2 (fr) * 1994-10-10 1996-04-17 L.G.L. ELECTRONICS S.p.A. Frein de fil positif modulé pour fournisseurs de trame
EP1094138A1 (fr) 1999-10-22 2001-04-25 L.G.L. Electronics S.p.A. Dispositif anti-ballon pour les fournisseurs de trame de métiers à tisser
EP1149793A2 (fr) 2000-04-28 2001-10-31 L.G.L. Electronics S.p.A. Dispositif anti-ballon pour fournisseurs de trame de métiers à tisser, plus particulièrement de métiers à tisser à jet d'air

Also Published As

Publication number Publication date
CN101713117A (zh) 2010-05-26
US20100071799A1 (en) 2010-03-25

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