EP1939340B1 - A yarn-feeding device for a circular knitting machine - Google Patents

A yarn-feeding device for a circular knitting machine Download PDF

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Publication number
EP1939340B1
EP1939340B1 EP07123608.7A EP07123608A EP1939340B1 EP 1939340 B1 EP1939340 B1 EP 1939340B1 EP 07123608 A EP07123608 A EP 07123608A EP 1939340 B1 EP1939340 B1 EP 1939340B1
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EP
European Patent Office
Prior art keywords
yarn
disengagement
knitting machine
guide roller
elastic yarn
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Application number
EP07123608.7A
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German (de)
English (en)
French (fr)
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EP1939340A1 (en
Inventor
Yasushi Onishi
Masaru Enishi
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.)
Precision Fukuhara Works Ltd
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Precision Fukuhara Works Ltd
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Publication date
Application filed by Precision Fukuhara Works Ltd filed Critical Precision Fukuhara Works Ltd
Publication of EP1939340A1 publication Critical patent/EP1939340A1/en
Application granted granted Critical
Publication of EP1939340B1 publication Critical patent/EP1939340B1/en
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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

Definitions

  • the present device relates to a circular knitting machine for plating knitting according to the preamble of claim 1.
  • a circular knitting machine for plating knitting according to the preamble of claim 1.
  • Such a machine is for example disclosed in US-A-3800564 .
  • the main method is plating knitting, in which an elastic yarn is knitted together with a ground yarn.
  • a guide roller When the elastic yarn is knitted, it is guided by a guide roller so as to keep the feeding tension as low as possible.
  • a guide ring or "a guide roller" is used.
  • Patent US 6386003 B1 discloses a circular knitting machine yarn feeder for stretchable yarn.
  • the yarn feeder includes a roller mounted on a feeding section member from one end of which a so-called jutting section projects. Stretchable yarn is led from the roller over and in frictional contact with the jutting section which thereby acts to prevent the forming of floss or at least retain any floss formed.
  • the blown air can sway the elastic yarn excessively and cause it to come off the periphery of the guide roller. Because the elastic yarn is super fine, it is difficult to visually check whether it is in the right position and not disengaged from the guide roller. If the knitting machine is re-operated with the elastic yarn disengaged from the guide roller, not only is plating knitting impossible but many problems can occur such as the elastic yarn being severed. Should that happen, the elastic yarn needs to be placed on the guide roller again, but because the elastic yarn is super fine, it has to be handled very carefully, so it takes extra time before the knitting machine is ready to be operated again.
  • the object of the present invention is to provide a device that prevents the elastic yarn from coming off the guide roller that guides the elastic yarn.
  • the present invention it is possible to reliably prevent the elastic yarn from coming off the guide roller of the yarn carrier when blowing away the cotton waste accumulated in the knitting head of the circular knitting machine, thereby preventing the production of a defective knitted fabric and improving the productivity of knitted fabric manufacturing.
  • the disengagement-preventive member so that it is movable according to an angle of advance of the elastic yarn, it is possible to reliably prevent the elastic yarn from coming off the guide roller of the yarn carrier.
  • the disengagement-preventive member is movable so that it does not come in contact with the elastic yarn during the knitting process.
  • the movable distance is preferably 3.0 mm to 8.0 mm, and ideally 4.0 mm to 6.0 mm.
  • the disengagement-preventive member may be, for example, a spiral wire mounted on the yarn carrier.
  • the major axis of the spiral may be 5-10 mm (preferably approximately 8 mm), and the minor axis of the spiral may be 3-8 mm (preferably approximately 5 mm).
  • a variation of the disengagement-preventive member is a wire positioned above the guide roller and outside the elastic yarn tangent to the inner diameter of the guide roller. The length of this wire, which is straight, is preferably long enough to cover the V groove of the guide roller. Either wire preferably has a diameter of approximately 2 mm.
  • a U-shaped guide is mounted on the yarn carrier, positioned on the path on which the elastic yarn passes from the guide roller to the knitting needle.
  • the elastic yarn is preferably arranged so that it passes through the U-shaped guide without touching the inside of the guide.
  • the disengagement-preventive member is preferably mounted at a position that is 0.5 to 1.0 mm from either the elastic yarn advancing from the right-hand side or the elastic yarn advancing from the left-hand side.
  • the above components can be installed in a mirror-image arrangement to obtain the same effect as the present device.
  • FIG. 1 is a front view of a circular knitting machine for plating knitting in which an elastic yarn is knitted together with a ground yarn.
  • This circular knitting machine has a knitting head 5 established above a bed 4, which is supported by legs 1, 2 and 3.
  • the knitting head 5 has a number of cylinder needles slidably housed in needle grooves of the cylinder 6. Facing the cylinder 6, a cam holder 7 equipped with control cams for the cylinder needles is supported.
  • the knitting yarn supplied by a yarn-feeding device is fed to the cylinder needle via a yarn carrier 8.
  • the cylinder is driven by a power unit arranged on the leg 1.
  • a number of posts 11 are erected.
  • a radially extending horizontal part 13 is fastened by means of a connecting part 12,
  • support parts 10a, 10b and 10c are mounted.
  • the support parts are provided with support rings 14a, 14b and 14c, which are arranged at different heights and have different diameters.
  • These support rings are provided with a multitude of yanr-feeding devices (only a first yarn-feeding device 15a and a second yarn-feeding device 15b are shown) each corresponding to its respective yarn carrier.
  • driving pulleys 17a, 17b and 17c that are driven synchronously with the revolution of the knitting machine are arranged at positions that correspond to the first yarn-feeding device 15a and the second yarn-feeding device 15b.
  • the driving pulleys 17a, 17b and 17c are connected to the first yarn-feeding device 15a and the second yarn-feeding device 15b via a driving belt (not shown).
  • the knitting yarn 18a (ground yarn) is supplied to the first yarn-feeding device 15a from an adjacent creel stand (not shown) and fed out by the first yarn-feeding device 15a at a desired speed, thereby supplying the knitting head 5 with the knitting yarn 18a (ground yarn) at a certain tension.
  • the second yarn-feeding device 15b is a yarn-supplying device for the elastic yarn and is equipped with a number of bobbins 16. These bobbins 16 are unwound at a desired speed and the elastic yarn 16a is supplied to the knitting head 5 at a certain tension.
  • a device such as that disclosed in JP-A-8-302547 (MER by Memminger-IRO GmbH) can be used.
  • the elastic yarn 16a is supplied to the knitting needle via a guide roller 8b ( FIGs. 2 , 4 , 5 ) mounted on the yarn carrier 8.
  • the guide roller has a cylindrical form with a diameter of 10 to 20 mm and is provided with a V groove 81b on its cylindrical sidewall. The bottom of the V groove is approximately 5 mm lower than the circumference of the guide roller.
  • the yarn carrier 8 is provided with a U-shaped guide 8f on the path through which the elastic yarn 16a runs from the guide roller 8b to the knitting needle in such a way that the elastic yarn 16a passes through the U-shaped guide 8f without touching it.
  • the angle of incidence of the elastic yarn can be finely adjusted using a screw 8i so that the elastic yarn does not touch the inside of the U-shaped guide.
  • the width (z) of the U-shaped groove is approximately 1.8 mm.
  • the upper projection of the U shape is approximately 3 mm (y) from the surface of the yarn carrier; the lower projection of the U shape is approximately 1 mm (x) from the surface of the yarn carrier.
  • the distance between the sensor 19 of the second yarn-feeding device 15b and the guide roller 8b is typically 1 m or longer. Because there is no part that guides the elastic yarn 16a in this space, the blown air can sway the elastic yarn 16a excessively and cause it to come off the periphery of the guide roller 8b.
  • the angle at which the elastic yarn 16a enters from the sensor 19 of the second yarn-feeding device 15b to the guide roller 8b can vary by up to 30° because of the reason explained below.
  • a support part 10c is mounted on a support ring 14c on which the second yarn-feeding device 15b is arranged
  • a guide pulley for guiding the driving belt is arranged on a support ring 14c that faces a driving pulley 17c, therefore a second yarn-feeding device 15b cannot be arranged on this support ring 14c. Because of this, the second yarn-feeding devices 15b are not spaced at equal intervals on the support rings 14c.
  • yarn carriers 8 are arranged at equal intervals on yarn-carrier rings 9 that support the yarn carriers 8. Because of this, the angle at which the elastic yarn 16a enters from the sensor 19 for the second yarn-feeding device 15b to the guide roller 8b for the yarn carrier 8 can vary by up to 30°.
  • a disengagement-preventive member 8c that keeps the warping of the elastic yarn 16a to a minimum, thereby preventing the elastic yarn 16a from coming off the periphery of the guide roller 8b is positioned just before or upstream of the guide roller 8b.
  • the elastic yarn 16a enters at a maximum angle of 30°.
  • the disengagement-preventing member 8c is moved to the right and fastened at that position.
  • Code C in FIG. 5 indicates a cross-section of the right arc or side of the disengagement-preventing member 8c that has been moved to the right. (A cross-section of the left arc or side thereof is not shown so as to avoid making the drawing look too complicated.)
  • the disengagement-preventing member 8c For the elastic yarn 16a entering from the left-hand side (dotted line B in FIG. 4 ), the disengagement-preventing member 8c is moved to the left and fastened at that position.
  • Code D in FIG. 5 indicates a cross-section of the right arc or side of the disengagement-preventing member. (The cross section of the left arc or side thereof is not shown so as to avoid making the drawing look too complicated.)
  • the disengagement-preventing member 8c is mounted in such a way that it is movable between the position marked C and the position marked D in FIG. 5 .
  • the gap between the side labelled C and the elastic yarn entering from the right-hand side (labelled A) and the gap between the side labelled D and the elastic yarn entering from the left-hand side (labelled B) are both approximately 0.5-1.0 mm.
  • the elastic yarn 16a does not come in contact with the disengagement-preventing member 8c so as to keep the yarn-feeding tension of the elastic yarn 16a low.
  • FIG. 2 A specific example of the structure of the disengagement-preventing member 8c is shown in FIG. 2 .
  • the shape of the disengagement-preventing member 8c is most preferably spiral. If it is a ring, the elastic yarn 16a has to be threaded though this ring, but if it is a spiral, the elastic yarn 16a can be passed through the spiral easily from an opening in the spiral.
  • the major axis and the minor axis of the spiral are approximately 8 mm and 5 mm respectively. It is preferable that the diameter of the wire is approximately 2 mm,
  • the disengagement-preventing member 8c In order to adjust the position of the member 8c to accommodate the change of angle of the elastic yarn 16a according to the advancing direction of the elastic yarn 16a and to avoid the preventing member from touching the elastic yarn 16a, the disengagement-preventing member 8c needs to be fastened in such a way that it is movable by approximately 5 mm.
  • a method of mounting the disengagement-preventing member 8c to achieve this is shown in FIG. 7 .
  • a disengagement-preventing-member-fastening block 8d is provided with a holding groove 8g for holding a leg of the disengagement-preventing member 8c.
  • the disengagement-preventing-member 8c is fastened using a screw 8e in this holding groove so that it can be unfastened, slid and fastened again.
  • the depth of the holding groove 8g is smaller than the wire diameter of the disengagement-preventing member 8c, so when the screw 8e is tightened, the leg of the disengagement-preventing member 8c is squeezed and fastened by the head of the screw 8e.
  • the screw 8e also has a role of fastening the block 8d to the yarn carrier 8.
  • the fastening block 8d with a contoured or bumpy shape 8j.
  • a surface engaged by the fastening block 8d may have a complementarily contoured shape.
  • the leg of the shaft 8h that pivotally supports the guide roller 8b is adjustably fastened with a screw 8i in a hole provided on the block 8d.
  • the leg 8c of the disengagement-preventing member 8c can also be fastened in the same way.
  • a second example of the present device is a disengagement-preventing member 88c made of a straight wire as shown in FIG. 3 .
  • the disengagement-preventing member 88c is preferably mounted above the guide roller 8b and outside the elastic yarn's 16a tangent to the inner diameter of the guide roller 8b, and at a position 0.5-1.0 mm away from the elastic yarn 16a.
  • the length of the straight wire can be of any length as long as it covers the V groove of the guide roller 8b. It is preferable that the diameter of the wire is approximately 2 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP07123608.7A 2006-12-25 2007-12-19 A yarn-feeding device for a circular knitting machine Active EP1939340B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2006201734304U CN201040793Y (zh) 2006-12-25 2006-12-25 圆型针织机的喂纱装置

Publications (2)

Publication Number Publication Date
EP1939340A1 EP1939340A1 (en) 2008-07-02
EP1939340B1 true EP1939340B1 (en) 2019-02-27

Family

ID=39092044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07123608.7A Active EP1939340B1 (en) 2006-12-25 2007-12-19 A yarn-feeding device for a circular knitting machine

Country Status (5)

Country Link
EP (1) EP1939340B1 (es)
CN (1) CN201040793Y (es)
ES (1) ES2714382T3 (es)
PT (1) PT1939340T (es)
TR (1) TR201903479T4 (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101787616A (zh) * 2010-02-11 2010-07-28 嘉兴港恒针织有限公司 单面四轨道平纹机
ITMI20110620A1 (it) * 2011-04-13 2012-10-14 Santoni & C Spa Macchina circolare per maglieria o per calzetteria con accessibilita' alla testa tessile migliorata.
JP2012255225A (ja) * 2011-06-08 2012-12-27 Precision Fukuhara Works Ltd 丸編機における糸案内装置
CN104153112A (zh) * 2014-07-10 2014-11-19 泉州恒毅机械有限公司 新型毛巾机喂纱嘴装置
JP6293096B2 (ja) * 2015-07-16 2018-03-14 株式会社島精機製作所 横編機における給糸機構
WO2017157871A1 (de) 2016-03-14 2017-09-21 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Textilmaschine mit gleichmässiger fadenspannung
DE202016001658U1 (de) 2016-03-14 2016-08-01 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Textilmaschine mit gleichmäßiger Fadenspannung
CN106344211B (zh) * 2016-08-31 2017-12-05 桐庐洲济医疗器械有限公司 前交叉韧带重建集合移植肌腱编织器
CN109505052B (zh) * 2018-12-29 2020-06-02 绍兴美科针纺有限公司 一种大圆机的送纱机构
CN111501174B (zh) * 2020-04-24 2022-05-27 广东前进牛仔布有限公司 一种针织面料及其制备方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3352511A (en) * 1965-04-27 1967-11-14 Entpr Machine & Dev Corp Yarn tensioning device
US3800564A (en) * 1971-10-13 1974-04-02 Pilot Res Corp Yarn plating method and apparatus for circular knitting machines
DE19637556C1 (de) * 1996-09-14 1998-01-08 Memminger Iro Gmbh Fadenliefervorrichtung
DE19804211A1 (de) * 1998-02-03 1999-08-05 Teixits De Punt Campmany S A Fadenführer für plattierte dreifädige Gestricke am Rundwebstuhl
CN1401842A (zh) 2001-08-13 2003-03-12 佰龙机械厂股份有限公司 改进型圆编机的给纱器构造
JP2003055866A (ja) 2001-08-20 2003-02-26 Hakuryu Kikaisho Kofun Yugenkoshi 丸編み機の給糸器の構造

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
ES2714382T3 (es) 2019-05-28
EP1939340A1 (en) 2008-07-02
CN201040793Y (zh) 2008-03-26
TR201903479T4 (tr) 2019-04-22
PT1939340T (pt) 2019-03-28

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