EP3390707B1 - Fadenführer mit motoranordnung zur regelung der fadenspannung - Google Patents

Fadenführer mit motoranordnung zur regelung der fadenspannung Download PDF

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Publication number
EP3390707B1
EP3390707B1 EP16876142.7A EP16876142A EP3390707B1 EP 3390707 B1 EP3390707 B1 EP 3390707B1 EP 16876142 A EP16876142 A EP 16876142A EP 3390707 B1 EP3390707 B1 EP 3390707B1
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EP
European Patent Office
Prior art keywords
yarn
motor
yarn feeder
feeder
braking element
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Application number
EP16876142.7A
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English (en)
French (fr)
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EP3390707A4 (de
EP3390707A1 (de
Inventor
Pär JOSEFSSON
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Iro AB
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Iro AB
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Publication of EP3390707A4 publication Critical patent/EP3390707A4/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
    • D04B15/484—Yarn braking means acting on the drum
    • 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

  • the present disclosure relates to a yarn feeder.
  • a yarn feeder for textile machines especially weaving and knitting machines, comprising a motor assembly with the purpose to electronically regulate the tension of the yarn withdrawn from the feeder.
  • Yarn feeders are used to eliminate yarn tension variations to ensure high quality and also to supply the correct amount of yarn. Hereby textile quality and productivity can be increased.
  • One feature of a yarn feeder is to provide a suitable yarn tension for the yarn fed to a weaving machine.
  • the yarn tension applied can be provided in different manners.
  • a frustum-conical braking element can be used that cooperates with the withdrawal rim of the spool body to create a braking force, see EP 0 534 263 .
  • the braking force applied can be controlled by a motor, such as a step motor that is used to control the braking force, see EP 0 707 102 .
  • Yarn feeders can also be provided with a quick adjustment mechanism adapted to release the braking element from a position where it acts to brake the yarn by cooperating with the withdrawal rim of the spool body into a gap position where the braking element is distanced from said withdrawal rim, see EP2586896A2 and EP1059375A1 .
  • the aim of such a quick adjustment mechanism is to i.a. make it possible to preferably in one single action and stroke place the braking element in a position where it is possible to for example replace the spool body or the braking element or to thread a new yarn either by hand or by some automatic means, known per se.
  • Quick adjustment mechanisms can have different designs and be located in different locations on the yarn feeder, but essentially act to in a quick manner release a section of the yarn feeder from the rest of the yarn feeder, thereby releasing the braking element from the braking position and place it in a gap position where maintenance operations can be undertaken.
  • the quick adjustment mechanism is typically also designed to not alter any yarn brake/tension settings when being operated/actuated so that there is no need for any new calibration or setting when the braking element is returned to the braking position.
  • Mechanical quick adjustment mechanisms are for example described in US 5,947,403 and EP 0 826 619 .
  • the feeder has a so called quick release mechanism. It is further provided a yarn brake motor assembly to control the yarn braking force applied by the braking element.
  • the yarn brake motor assembly used is however fixedly mounted on the yarn feeder, which rules out the use of a quick release mechanism. The inventor has realized that if the yarn brake motor of the motor assembly is positioned in the quick release mechanism itself it will in fact be possible to combine a quick release mechanism with the use of a motor assembly for controlling the braking force of the yarn braking element.
  • the motor is at least partly located/integrated in the release handle of a quick release mechanism such as the types described in the above-cited references US 5,947,403 and EP 0 826 619 , or in some other possible type of release mechanism that in one single operational stroke puts the yarn braking element in a gap position.
  • a quick release mechanism such as the types described in the above-cited references US 5,947,403 and EP 0 826 619 , or in some other possible type of release mechanism that in one single operational stroke puts the yarn braking element in a gap position.
  • a yarn feeder comprising a brake motor assembly.
  • the brake motor assembly is adapted to control the position of a braking element cooperating with a spool body of the yarn feeder.
  • the yarn feeder further comprises a quick release mechanism whereby the braking element can be moved from a braking position where the braking element is positioned to brake a yarn withdrawn from the yarn feeder to a gap position where the braking element is distanced from the spool body.
  • a motor of the brake motor assembly is fixedly arranged in or attached to a part that is released when operating said quick release mechanism.
  • the motor is at least partly located in a control handle of the quick release mechanism.
  • the housing of the motor can form the control handle.
  • the housing of the motor can alternatively be a part of the control handle.
  • the motor is controllable via a control input located on said control handle. In another embodiment the motor is controllable via a control input located in electronics of the yarn feeder. In yet another embodiment the motor is controllable via a control input located in a weaving machine with which the yarn feeder is cooperating.
  • the motor can be controlled via a feedback signal from a yarn tension meter mounted downstream of the yarn feeder.
  • Fig. 1 depicts a yarn feeder 10.
  • an extension arm 12 called top cover in the field of yarn feeders, is arranged extending from a housing 14 for example as described in US 5,947,403 .
  • the yarn feeder 10 comprises a yarn braking element 16, which is shown in Fig. 1 in its braking position.
  • the yarn braking element 16 cooperates in a customary manner with the withdrawal rim of the spool body 18.
  • the yarn braking element 16 can thus be moved back and forth along an axis A to control the braking force applied to a yarn withdrawn from the yarn feeder 10.
  • the yarn braking element 16 can be attached to the extension arm 12 via, an along the axis A slidable, brake element holder 27 provided at the extension arm 12.
  • the yarn braking element 16 is in the braking position in which it is axially pressed with a predetermined, settable axial force against the spool body 18.
  • This position can be changed by running a motor of a brake motor assembly 20 to vary the contact pressure of the yarn braking body 18, by making the braking element 16 move along the axis A.
  • the brake motor assembly comprises a motor (see Fig. 3 ) with the motor axis connected to a rotatable threaded element 25.
  • a nut 23, being fixedly attached to the braking element holder 27, cooperates with the threaded element 25 when it is being rotated to move the braking element holder 27, and hence simultaneously the held yarn braking element 16, axially along the extension arm 12.
  • the movement of the yarn braking element 16 can in this manner be controlled by the brake motor assembly 20 by running the motor to rotate the threaded element 25, whereby the slidable braking element holder 27 is moved in axial direction and hence also the braking element 16 fixedly attached to the slidable braking element holder 27.
  • a quick release mechanism for moving the yarn braking element 16 between a respective braking position and a gap position is provided on the yarn feeder 10.
  • the quick release mechanism can in accordance with one embodiment be arranged to move the yarn braking element 16 between a respective braking position and a gap position in one stroke.
  • a control handle 24 on the quick release mechanism is turned by hand, for example in the clockwise direction, whereby the releasable section of the feeder, comprising the yarn brake holder 27 and the yarn braking element 16 will be moved to the right in Fig. 1 , into its released position, at some gap distance from the spool body of the feeder.
  • control handle can act over a bayonet type of connection/transmission in order to release the releasable section of the yarn feeder, comprising the braking element holder 27 and hence the braking element 16, in one single stroke by a one-hand small turning movement of the control handle.
  • a bayonet screw 22 provided with a helical groove on its outer surface, is fixed to the rear end wall of the brake motor assembly 20 facing the feeder.
  • said motor housing in this embodiment forming the control handle 24 of the quick release mechanism, the stationary pin 30, will hereby co-act with the helical groove on said housing, whereby the whole brake motor assembly 20, the motor axis of which being connected to or alternatively itself forming the rotatable threaded element 25, will be displaced a small distance to the right respectively to the left in axial direction, together with a brake ring holder 17 and the yarn braking element 16.
  • Fig. 2 shows the yarn feeder 10 with the quick release mechanism and the releasable section moved to the right.
  • the control handle 24 is again turned. Again preferably with only one hand and in one single stroke, in the opposite direction.
  • the previously adjusted contact pressure of the yarn braking element 16 against the withdrawal rim of the spool body of the feeder will hereby remain un-changed compared to the previously applied contact pressure (before the quick release cycle).
  • a brake motor assembly 20 can form/constitute a part of the quick release mechanism.
  • the brake motor assembly 20 is integrated in the quick release mechanism.
  • a motor 26 (shown in Fig. 3 ) of the brake motor assembly 20 can be controlled via control buttons 28 and 29.
  • the motor 26 can for example be a step motor or a DC motor.
  • the control buttons 28 and 29 can be located on the control handle 24 of the quick release mechanism.
  • Fig. 3 a cross-sectional view from the side of the control handle 24 is shown.
  • the control handle 24 itself in the embodiment depicted in Fig.3 , houses the motor 26 of the brake motor assembly 20.
  • the motor 26 can, at least partly, be located in a control handle 24 of the quick release mechanism.
  • the housing of the motor 26 can form the quick release handle 24 or at least a part of the quick release handle 24.
  • the yarn feeder can be provided with a brake motor mounted on a part that is quickly released by another type of mechanism such as a trigger type mechanism, e.g. a push button, knob, etc. and moved to a gap position by a spring force or simply by hand force to a gap position, and vice versa, by hand.
  • a trigger type mechanism e.g. a push button, knob, etc.
  • the mechanism in accordance with a mechanism as set out in EP 0 826 619 .
  • a trigger mechanism including any kind of unlatch mechanism that is controlled by pressure acting on the mechanism can be used.
  • the term trigger mechanism is intended to cover all such conventional pressure activated mechanisms.
  • the motor 26 can be controllable via a control input located on the handle. In another embodiment the motor 26 is controllable via a control input located in the feeder electronics of the yarn feeder 10. In yet another embodiment the motor 26 is controllable via a control input located in the electronics panel in a weaving machine with which the feeder is cooperating.
  • the motor 26 can also be controlled via a feedback signal received from a yarn tension meter mounted downstream of the feeder.
  • the provision of the motor assembly in the quick release mechanism further facilitates easy brake motor assembly maintenance and repair.

Landscapes

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

Claims (7)

  1. Fadenführer (10), umfassend eine Bremsmotoranordnung (20), wobei die Bremsmotoranordnung (20) eingerichtet ist, die Position eines Bremselements (16) zu steuern, das mit einem Spulenkörper (18) des Fadenführers (10) zusammenwirkt, wobei der Fadenführer (10) weiter einen Schnelllösemechanismus umfasst, wobei das Bremselement (16) von einer Bremsposition, wo das Bremselement (16) positioniert ist, um einen Faden zu bremsen, der vom Fadenführer (10) abgezogen wird, zu einer Spaltposition bewegt werden kann, wo das Bremselement (16) vom Spulenkörper (18) beabstandet ist, und wobei ein Motor (26) der Bremsmotoranordnung (20) fest in einem Teil angeordnet oder an diesem befestigt ist, der gelöst und bewegt wird, wenn der Schnelllösemechanismus betrieben wird,
    dadurch gekennzeichnet, dass der Motor (26) zumindest teilweise in einem Steuergriff (24) des Schnelllösemechanismus gelegen ist.
  2. Fadenführer (10) nach Anspruch 1, wobei ein Gehäuse des Motors (26) den Steuergriff (24) bildet.
  3. Fadenführer (10) nach Anspruch 1, wobei ein Gehäuse des Motors (26) ein Teil des Steuergriffs (24) ist.
  4. Fadenführer (10) nach einem der Ansprüche 1-3, wobei der Motor (26) durch Steuerknöpfe (28, 29), die auf dem Steuergriff (24) gelegen sind, steuerbar ist.
  5. Fadenführer (10) nach einem der Ansprüche 1-4, wobei der Motor (26) durch einen Steuereingang steuerbar ist, der in Elektronik des Fadenführers (10) gelegen ist.
  6. Fadenführer (10) nach einem der Ansprüche 1-5, wobei der Motor (26) durch einen Steuereingang steuerbar ist, der in einer Webmaschine gelegen ist, mit der der Fadenführer (10) zusammenwirkt.
  7. Fadenführer (10) nach einem der Ansprüche 1-6, wobei der Motor (26) durch ein Rückkopplungssignal von einem Fadenspannungsmessgerät steuerbar ist, das stromabwärts des Fadenführers (10) montiert ist.
EP16876142.7A 2015-12-16 2016-11-22 Fadenführer mit motoranordnung zur regelung der fadenspannung Active EP3390707B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1500516 2015-12-16
PCT/SE2016/051153 WO2017105315A1 (en) 2015-12-16 2016-11-22 Yarn feeder with motor assembly for yarn tension regulation

Publications (3)

Publication Number Publication Date
EP3390707A1 EP3390707A1 (de) 2018-10-24
EP3390707A4 EP3390707A4 (de) 2019-01-02
EP3390707B1 true EP3390707B1 (de) 2020-01-15

Family

ID=59057027

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Application Number Title Priority Date Filing Date
EP16876142.7A Active EP3390707B1 (de) 2015-12-16 2016-11-22 Fadenführer mit motoranordnung zur regelung der fadenspannung

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EP (1) EP3390707B1 (de)
CN (1) CN108884610B (de)
WO (1) WO2017105315A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111321507B (zh) * 2020-02-27 2021-04-20 南京玻璃纤维研究设计院有限公司 一种纱线张力调节装置
CN113737369B (zh) * 2021-09-10 2023-03-07 高梵(浙江)信息技术有限公司 一种无缝直充针织羽绒服面料的加工装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29623532U1 (de) * 1995-07-24 1998-09-24 Iro Ab, Ulricehamn Fadenliefergerät
DE19533310A1 (de) * 1995-07-24 1997-01-30 Iro Ab Fadenliefergerät
EP0840706B2 (de) * 1995-07-24 2003-09-03 Iro Ab Fadenliefergerät
IT239803Y1 (it) * 1996-09-03 2001-03-13 Lgl Electronics Spa Dispositivo di ritegno a sgancio rapido del supporto portafreno diapparecchi alimentatori di trama per macchine tessili
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
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"
EP2924156B1 (de) * 2014-03-28 2016-11-23 L.G.L. Electronics S.p.A. Garnbremsvorrichtung für Speicherfournisseur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3390707A4 (de) 2019-01-02
WO2017105315A1 (en) 2017-06-22
EP3390707A1 (de) 2018-10-24
CN108884610B (zh) 2020-10-13
CN108884610A (zh) 2018-11-23

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