US20070227197A1 - Yarn Feeder Device - Google Patents

Yarn Feeder Device Download PDF

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Publication number
US20070227197A1
US20070227197A1 US11/569,082 US56908205A US2007227197A1 US 20070227197 A1 US20070227197 A1 US 20070227197A1 US 56908205 A US56908205 A US 56908205A US 2007227197 A1 US2007227197 A1 US 2007227197A1
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United States
Prior art keywords
yarn
rod
tension
control unit
sensor
Prior art date
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Abandoned
Application number
US11/569,082
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English (en)
Inventor
Giovanni Corsani
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Individual
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Individual
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Publication of US20070227197A1 publication Critical patent/US20070227197A1/en
Abandoned legal-status Critical Current

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    • 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

Definitions

  • This invention relates to a device for feeding yarns to textile machines, such as circular or straight knitting machines, that can be adapted either to machines in which the yarn consumption rate is constant or to machines in which the yarn is knitted discontinuously (it is a well-known fact that said discontinuous yarn consumption induces periodic changes in the yarn's tension that can combine with tension variations due to irregularities in the yarn itself in negatively influencing the quality of the resulting fabric and the continuity of its production).
  • the device forming the object of this invention can also be used in certain stages of the spinning process, e.g. to feed yarn at a uniform tension to twisting or stranding machines, or the like.
  • This invention refers to a yarn feeder device comprising a yarn tension sensor and a yarn feed roller around which the yarn is wound to prevent any relative slipping, the roller being motorized by means of a variable-speed motor complete with a rotation sensor and governed by a microprocessor-controlled electronic unit suitable for adjusting the speed of the roller as a function of the signal coming from said tension sensor.
  • the device comprises a pulley for carrying the yarn, wherein the incoming and outgoing lengths of yarn together form a relatively narrow, or substantially near-zero angle ( ⁇ ).
  • the pulley is suspended from a sensitive element of the tension sensor suitable for transmitting a signal to said feed roller motor control unit that is proportional to the resultant of the forces exerted on the pulley by the yarn, and the control unit has a program resident in its memory for keeping the value of said resultant of the forces (corresponding to the yarn tension) within a pre-established range of yarn tensions by adjusting the speed of the motor, and consequently of the feed roller.
  • the yarn thus brings a force to bear on the tension sensor that is approximately twice the actual tension of the yarn, thereby increasing the sensor's sensitivity by comparison with known feeder devices.
  • the electronic control unit of the device can also be interfaced with the machine to which the device is attached in order to receive data (e.g. using suitable sensors) and/or instructions from the latter, and to adjust the working tension of the yarn being fed to the machine accordingly, depending on its working program, or it can send the machine information such as the length of yarn delivered in each working stage.
  • the previously-mentioned tension adjustments can be made in steps or continuously, depending on the needs of the garment being made by the machine, and they can be set by means of an operator interface connected to the control unit of the device, such as a personal computer either connected to said control unit or on board the machine itself.
  • the pulley supporting block comprises a U-shaped bracket housing the pulley, the stud supporting the pulley being attached to the ends of said bracket.
  • the sensor is of the slender cylinder-shaped type and is glued to a flat or concave seat coinciding with the end of the rod, with its axis lying parallel to said rod, said U-shaped bracket resting up against the sensor on the side opposite said seat on the rod.
  • the pulley block bracket is hinged onto one free end of a tab to which a bending sensor is attached, composed for instance of one or more strain gauges.
  • the tension sensor and consequently also a stud from which the pulley carrying the yarn is suspended, can be solidly attached to the body of the feeder device, or applied to the free end of a yarn take-up rod.
  • This second solution is particularly suitable when the machine served by the feeder device has a discontinuous yarn consumption rate.
  • FIGS. 1 and 2 schematically illustrate an elevational view and a view from above (along II-II of FIG. 1 ), respectively, of the device according to a first embodiment of the invention
  • FIGS. 3 and 4 show partial views from above along III-III and IV-IV of FIG. 1 ;
  • FIG. 5 is an enlargement of the detail V in FIG. 1 ;
  • FIG. 6 is a cross-section along VI-VI of FIG. 5 ;
  • FIG. 7 shows a side view of another form of embodiment of the device according to the invention.
  • FIG. 8 shows an enlargement of the detail VIII in FIG. 7 ;
  • FIG. 9 shows a view along IX-IX of FIG. 8 .
  • the device according to the invention has a plate-shaped body 1 , to which a variable-speed electric motor (e.g. of the brushless, direct-current type) and a corresponding electronic control unit (not illustrated in the drawing) are attached.
  • a variable-speed electric motor e.g. of the brushless, direct-current type
  • a corresponding electronic control unit not illustrated in the drawing
  • the device has a revolving roller 3 mounted co-axially on the output shaft of the motor, a plate-type yarn tensioner 5 , a rod 7 swinging around an axis X-X, a rod-returning spring 9 , an arched blade serving as a rabbet 10 for the rod 7 , and a graduated segment 12 of a circle whose center lies on the axis X-X, suitable for identifying the angular position of the rod 7 .
  • the roller 3 has a cylindrical outer surface suitable for generating a friction with the yarn wound thereon, made of elastomer for instance, or with a hard, rough metal surface layer.
  • the plate-type yarn tensioner comprises a pair of plates 5 A, 5 B ( FIG. 3 ) kept in contact with each other—on their smooth, wear-proof sides—by a compression spring 5 C adjustable by means of a threaded knob 5 D.
  • the spring 9 is a traction spring that obliges the rod 7 to turn in the direction of the arrow F 1 , one end of the spring being attached by means of a screw to the periphery of the hub 7 A of the rod, and the other end being fixed by means of another screw to the periphery of a bush 8 attached to the front of the body 1 by means of a swivel screw 8 A ( FIG. 4 ).
  • the tension on the spring 9 can be adjusted by loosening the screw 8 A, turning the bush 8 one way or the other, and then tightening it again in the required position.
  • a block 11 is attached to the free end of the rod 7 and comprises an idle pulley 13 with an outer race 13 A, and a holder for the pulley substantially composed of a bracket 11 A bent into a U shape, with the stud 11 B supporting the pulley 13 caulked onto its ends.
  • the block 11 is kept axially on the rod 7 with some degree of clearance by means of a pair of elastic rings 7 B inserted in corresponding grooves (not illustrated) in the rod 7 , and rests against the rod 7 with a pressure sensor 15 sandwiched between the two and attached to the rod, e.g. by means of glue, in a cavity 7 C in said rod.
  • the pressure sensor 15 is electrically connected to the electronic control unit contained in the body 1 , by means of electric wires not illustrated in the drawing.
  • the above-described device can feed yarn 17 to a textile machine for processing, to produce a knitted fabric for instance.
  • the yarn (coming from a reel that is not illustrated in the drawing) passes through the adjustable yarn tensioner 5 , then winds at least one turn around the roller 3 before passing through the race 13 A in the pulley 13 , which returns it through a yarn guide 19 to deliver it to the machine for processing.
  • the lengths of yarn entering and exiting from the pulley 13 together form a very narrow angle ⁇ (e.g. approximately 7° in the example in FIG. 1 ).
  • ⁇ e.g. approximately 7° in the example in FIG. 1 .
  • the tension of the yarn being processed makes the rod 7 turn in the direction opposite the arrow F 1 of FIG. 1 , overcoming the effect of the spring 9 .
  • the force exerted by the spring is adjusted by the operators, who adjust the angular position of the bush 8 so that, with the required tension on the yarn, the rod 7 is positioned at a certain angle with respect to the graduated segment 12 , e.g. approximately at the midline thereof.
  • the control unit contained in the body 1 receives a signal from the pressure sensor 15 that is proportional to the tension on the yarn 17 ; it compares the signal with the required tension previously specified in its resident memory, and then it adjusts the speed of the motor driving the roller 3 so as to keep the tension of the yarn 17 close to the required value.
  • the control unit accelerates the movement of the roller 3 ; vice versa, it makes the roller turn more slowly if said pressure tends to diminish with respect to the pre-set value.
  • the device has a plate-shaped body 201 , to which a variable-speed electric motor (e.g. of the brushless, direct-current type) and a corresponding electronic control unit (not illustrated in the drawing) are attached.
  • a variable-speed electric motor e.g. of the brushless, direct-current type
  • a corresponding electronic control unit not illustrated in the drawing
  • the device has a revolving roller 203 mounted co-axially on the output shaft of the motor, that is on the opposite side of the plate 201 , a plate-type yarn tensioner 205 entirely similar to the one 5 in FIG. 1 , a rod 207 swinging around an axis X-X, and a rod-returning device 209 .
  • the take-up rod 207 is obliged to move clockwise (looking at FIG. 7 ) by a wheel 212 idly supported onto the end of a small rod 214 , which is in turn hinged along an axis Y-Y to a saddle 216 sliding on a horizontal guide 217 and attachable thereto, in the preferred position, by means of fixing means that are not illustrated in the drawing.
  • a spiral spring 220 working between the small rod 214 and the saddle 216 , obliges said small rod to move clockwise so as to rest against the take-up rod 207 , making the latter turn in the same direction.
  • the saddle 216 also has an extension 216 A, which serves as a rabbet for the rod 207 , restricting its downward movement due to the tugging of the yarn.
  • a tab 221 in the form of a thin, narrow and elongated plate, is welded onto the free end of the rod 207 ; the upper side of the other end of said tab is welded to a bush 221 A for a stud enabling the swinging of a bracket 211 , which carries an idle pulley 213 , said bracket and pulley being similar and serving the same purposes as the corresponding elements 11 and 13 of FIG. 1 .
  • Two strain gauges 215 are attached to the two sides of the tab 221 , which are electrically connected, forming a bridge, to the control unit (not illustrated) of the device and serving the same purpose as the sensor 15 of FIG. 1 .
  • the yarn 17 ( FIG. 7 ) fed by the device encounters the plate-type tensioner 205 first and then, after being diverted by a counter-roller 223 (which is idly hinged onto a lever 225 , that is in turn hinged to the plate 201 and held by a spring 227 up against the roller 203 ), the yarn is wound through approximately 180° onto the motor-driven roller 203 and then passes onto the pulley 213 , being diverted by the latter through approximately 180° and exiting from the device through a yarn guide 219 attached to the plate 201 .
  • a counter-roller 223 which is idly hinged onto a lever 225 , that is in turn hinged to the plate 201 and held by a spring 227 up against the roller 203
  • the yarn is wound through approximately 180° onto the motor-driven roller 203 and then passes onto the pulley 213 , being diverted by the latter through approximately 180° and exiting from the device through a yarn guide 219 attached to the plate 201
  • the device according to this embodiment of the invention is extremely sensitive to the feed tension of the yarn due to the sensor with the two bridging strain gauges 215 , so it facilitates the passage of the yarn onto the feed roller 203 , where it is wound only through 180°, and it also enables a precise and easy adjustment of the take-up rod 207 returning torque by means of the adjustable saddle 216 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Knitting Machines (AREA)
US11/569,082 2004-05-14 2005-05-12 Yarn Feeder Device Abandoned US20070227197A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITFI2004A000113 2004-05-14
IT000113A ITFI20040113A1 (it) 2004-05-14 2004-05-14 Dispositivo alimentatore di filo
PCT/IT2005/000273 WO2005111287A1 (en) 2004-05-14 2005-05-12 Yarn feeder device

Publications (1)

Publication Number Publication Date
US20070227197A1 true US20070227197A1 (en) 2007-10-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US11/569,082 Abandoned US20070227197A1 (en) 2004-05-14 2005-05-12 Yarn Feeder Device

Country Status (6)

Country Link
US (1) US20070227197A1 (zh)
EP (1) EP1751335A1 (zh)
JP (1) JP2007537369A (zh)
CN (1) CN1969071A (zh)
IT (1) ITFI20040113A1 (zh)
WO (1) WO2005111287A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110006096A1 (en) * 2008-03-11 2011-01-13 B.T.S.R. International S.P.A. Device and method for the constant tension feeding of threads or yarns fed in a discontinuous way
CN104034472A (zh) * 2014-06-20 2014-09-10 桂林电子科技大学 捻股机张力在线测量装置、测控系统及测控方法
US9181064B2 (en) 2010-05-18 2015-11-10 Btsr International S.P.A. Method and device for feeding a yarn or thread to a processing machine with constant tension and velocity
CN114808266A (zh) * 2022-05-24 2022-07-29 五洋纺机有限公司 一种新型连续性调节纱线张力平衡的装置

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20060335A1 (it) * 2006-12-22 2008-06-23 Giovanni Corsani Un dispositivo alimentatore e recuperatore del filo per macchine tessili
EP2503039B1 (en) 2008-12-30 2013-06-26 L.G.L. Electronics S.p.A. Positive yarn feeder with tension limiter
CN101988233B (zh) * 2010-09-03 2012-09-26 孙嘉良 电脑型贾卡经编机的单纱控制装置
CN101992952B (zh) * 2010-09-20 2012-10-03 沈阳矿山机械有限公司 一种回转圈数限制保护装置
CN102134785B (zh) * 2011-04-01 2013-01-02 厉力永 横机纱线自动上蜡装置
KR101295048B1 (ko) 2011-11-30 2013-08-09 주식회사 라지 판형 복합섬유용 장력조절장치
ITTO20120805A1 (it) * 2012-09-17 2014-03-18 Lgl Electronics Spa Alimentatore di filato a tamburo rotante per lavorazioni tessili con selezione del filato.
CN103245333B (zh) * 2013-05-09 2015-04-22 浙江理工大学 高速纺杯内剪切流场中纱线运动测量装置
CN103437057A (zh) * 2013-08-29 2013-12-11 江苏金龙科技股份有限公司 电脑针织横编机的定向导纱机构
CN103510211A (zh) * 2013-09-17 2014-01-15 吴江永固纺配有限公司 一种加捻锭子的主动喂纱装置
CN103510212A (zh) * 2013-09-17 2014-01-15 吴江永固纺配有限公司 一种并线机单个锭位上的纱线张力控制系统
ITMI20131761A1 (it) 2013-10-22 2015-04-23 Marsilli & Co Dispositivo per la regolazione automatica del tensionamento del filo durante le varie fasi di avvolgimento in macchine per l'avvolgimento di bobine elettriche.
CN108103651A (zh) * 2018-01-31 2018-06-01 海盐宏丰针织有限公司 一种可自动停机的针织横机
JP7358697B2 (ja) * 2021-12-20 2023-10-11 株式会社松原設備 墨出し補助具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3558026A (en) * 1967-09-25 1971-01-26 Rosen Karl I J Yarn feeder
US4706476A (en) * 1984-05-02 1987-11-17 Gustav Memminger Yarn supply apparatus for textile machines especially circular knitting machines
US4752044A (en) * 1986-08-16 1988-06-21 Gustav Memminger Yarn supply apparatus with electronic yarn tension control, particularly for knitting machines having rapidly varying yarn supply requirements
US5931023A (en) * 1995-10-12 1999-08-03 Du Pont Process and apparatus for knitting fabric with non-elastic yarn and bare elastomeric yarn and sweater knit fabric construction
US6170301B1 (en) * 1998-01-17 2001-01-09 H. Stoll Gmbh & Co. Method for producing a knitted article on a flat knitting machine
US7218988B2 (en) * 2003-10-17 2007-05-15 Shima Seiki Manufacturing Limited Yarn feeding apparatus of weft knitting machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3558026A (en) * 1967-09-25 1971-01-26 Rosen Karl I J Yarn feeder
US4706476A (en) * 1984-05-02 1987-11-17 Gustav Memminger Yarn supply apparatus for textile machines especially circular knitting machines
US4752044A (en) * 1986-08-16 1988-06-21 Gustav Memminger Yarn supply apparatus with electronic yarn tension control, particularly for knitting machines having rapidly varying yarn supply requirements
US5931023A (en) * 1995-10-12 1999-08-03 Du Pont Process and apparatus for knitting fabric with non-elastic yarn and bare elastomeric yarn and sweater knit fabric construction
US6170301B1 (en) * 1998-01-17 2001-01-09 H. Stoll Gmbh & Co. Method for producing a knitted article on a flat knitting machine
US7218988B2 (en) * 2003-10-17 2007-05-15 Shima Seiki Manufacturing Limited Yarn feeding apparatus of weft knitting machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110006096A1 (en) * 2008-03-11 2011-01-13 B.T.S.R. International S.P.A. Device and method for the constant tension feeding of threads or yarns fed in a discontinuous way
US8382023B2 (en) 2008-03-11 2013-02-26 B.T.S.R. International S.P.A. Device and method for the constant tension feeding of threads or yarns fed in a discontinuous way
US9181064B2 (en) 2010-05-18 2015-11-10 Btsr International S.P.A. Method and device for feeding a yarn or thread to a processing machine with constant tension and velocity
CN104034472A (zh) * 2014-06-20 2014-09-10 桂林电子科技大学 捻股机张力在线测量装置、测控系统及测控方法
CN114808266A (zh) * 2022-05-24 2022-07-29 五洋纺机有限公司 一种新型连续性调节纱线张力平衡的装置

Also Published As

Publication number Publication date
ITFI20040113A1 (it) 2004-08-13
JP2007537369A (ja) 2007-12-20
CN1969071A (zh) 2007-05-23
EP1751335A1 (en) 2007-02-14
WO2005111287A1 (en) 2005-11-24

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