EP2246465A1 - Yarn guide in circular knitting machine and knitting method using the yarn guide - Google Patents

Yarn guide in circular knitting machine and knitting method using the yarn guide Download PDF

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Publication number
EP2246465A1
EP2246465A1 EP09715203A EP09715203A EP2246465A1 EP 2246465 A1 EP2246465 A1 EP 2246465A1 EP 09715203 A EP09715203 A EP 09715203A EP 09715203 A EP09715203 A EP 09715203A EP 2246465 A1 EP2246465 A1 EP 2246465A1
Authority
EP
European Patent Office
Prior art keywords
yarn
guide surface
feeder
knit
knitting
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Withdrawn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
EP09715203A
Other languages
German (de)
English (en)
French (fr)
Inventor
Yasushi Onishi
Tsuyoshi Yamada
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
Original Assignee
Precision Fukuhara Works Ltd
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 Precision Fukuhara Works Ltd filed Critical Precision Fukuhara Works Ltd
Publication of EP2246465A1 publication Critical patent/EP2246465A1/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/16—Circular knitting machines with independently-movable needles with provision for incorporating internal threads in laid-in fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/10—Patterned fabrics or articles
    • D04B1/102—Patterned fabrics or articles with stitch pattern
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/10—Patterned fabrics or articles
    • D04B1/12—Patterned fabrics or articles characterised by thread material
    • D04B1/123—Patterned fabrics or articles characterised by thread material with laid-in unlooped yarn, e.g. fleece fabrics
    • 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
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/80—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the thread guides used

Definitions

  • the present invention relates to a yarn guide in a circular knitting machine and a knitting method using said yarn guide.
  • the invention relates in particular to a preventive tool (thread keeper) that prevents dropped stitches when welt needle selection continues for long at a feeder for jacquard knitting in knit-welt needle selections and a knitting method using said preventive tool.
  • a quilted knit fabric is generally knitted using a double knit circular knitting machine set up for rib gating in a knitting process as shown in FIG. 1 .
  • B1 in FIG. 1 is an example of a movement line of a cylinder needle (code 1 in FIG. 2 ), and A1 is an example of a movement line of a dial needle (code 2 in FIG. 2 ).
  • first yarn Y1 is supplied to cylinder needles 1 in knit-welt positions at first feeder F1; second yarn Y2, which will be filler, is fed from between first feeder F1 and second feeder F2 to between cylinder verge S1 and dial verge D1; third yarn Y3 is supplied to cylinder needles 1 in knit-welt positions and to dial needles 2 in knit positions at second feeder F2; fourth yarn Y4 is supplied to cylinder needles 1 in knit-welt positions at third feeder F3; and fifth yarn Y5 is supplied to cylinder needles 1 in knit-welt positions and to dial needles 2 in knit positions at fourth feeder F4.
  • a fabric obtained in the knitting process as described above has three layers: front fabric N1, which is knitted by cylinder needles 1 (see FIG. 6 ), back fabric N2, which is knitted by dial needles 2 (see FIG. 6 ), and filler Y2, which is inserted between them. If all cylinder needles 1 are in knit positions from the first feeder F1 to the fourth feeder F4 shown in FIG. 1 , a solid front fabric is obtained. In order to obtain an intricate design, however, these feeders may also be used to perform jacquard knitting. Specifically, to obtain a desired jacquard pattern, cylinder needles 1 from the first feeder F1 to the fourth feeder F4 are in knit-welt positions.
  • a preventive tool (code 3 in FIG. 1 and FIG. 2 ) is installed at the stitch parts of these feeders.
  • a problem with the prior art as described above is that when knit-welt needle selections are performed at high speed to knit a jacquard pattern, in which there are few knit needle selections and a long sequence of welt needle selections, if a yarn of a hard and non-elastic material is used, such as a rayon spun yarn or a polypropylene yarn, yarn breaking tends to occur while forming a loop at a yarn tension of 7 grams or more because of the lack of elasticity of the yarn. For this reason, the yarn feeding tension has to be set at 4-6 grams. At this time, as shown in FIGs.
  • yarn Y4 between the yarn carrier 4 and the cylinder needle 1, which captures the yarn supplied from the yarn carrier 4, is not required as much to form a loop as the amount of yarn actually supplied, so the excess yarn deflects substantially for approximately 3 mm as shown by dotted lines and comes off the guide surface of the preventive tool.
  • yarn may not be supplied to the cylinder needle 1, which should be selected to be in the knit position, and this causes dropped stitches. If the yarn comes off the guide surface of the preventive tool and welt selection continues for long, the welt yarn may run horizontally and be knitted at the stitch part of the next feeder, resulting in an erroneous pattern.
  • the object of the present invention is to provide a dropped stitch preventive tool (thread keeper) that prevents the knitting yarn from coming off the guide surface of the preventive tool that guides the knitting yarn.
  • the dropped stitch preventive tool of the present invention is a tool for preventing dropped stitches in a double knit circular knitting machine that performs knit and welt knitting with only cylinder needles, which is one process of knitting various fabrics, and comprises a first guide surface for preventing knitting yarn from deflecting in the radial direction of the circular knitting machine and coming off the guide surface and a second guide surface for preventing the same from deflecting in the vertical direction and coming off the guide surface.
  • the knitting method of the present invention is a method for knitting a quilted knit fabric using a double knit circular knitting machine set up for rib gating, comprising: a step for supplying first yarn to cylinder needles in knit-welt positions at the first feeder, a step for feeding second yarn, which will be filler, from between the first feeder and the second feeder to between the cylinder verge and the dial verge, a step for supplying third yarn to cylinder needles in knit-welt positions and to dial needles in knit positions at the second feeder, a step for supplying fourth yarn to cylinder needles in knit-welt positions at the third feeder, and a step for supplying fifth yarn to cylinder needles in knit-welt positions and to dial needles in knit positions at the fourth feeder, characterized in that the dropped stitch preventive tool is installed between the third feeder and the fourth feeder.
  • a yarn supplied from the feeder is guided by the first guide surface of the dropped stitch preventive tool installed between the yarn carrier and the cylinder needle, so it can maintain the same yarn-feed angle regardless of the yarn selection that varies according to the desired jacquard pattern.
  • the second guide surface that is positioned substantially parallel to the needle dial prevents the yarn from being routed to the back of the cylinder needle and causing dropped stitches. As a result, when knitting a quilt, for example, this can effectively prevent the knitting yarn from coming off the needle and prevent production of a defective knit fabric.
  • Knitting and welting using only cylinder needles is a process commonly performed in the production of various knit fabrics.
  • the dropped stitch preventive tool of the present invention can be used, for example, in quilt knitting.
  • the dropped stitch preventive tool of the present invention is shaped like a plate and is installed from the top toward the bottom of a cylinder stitch part of a feeder, where only cylinder needles are selected in knit and welt positions.
  • a first guide surface of the dropped stitch preventive tool located just above the hook of the cylinder needle slants upward by 10-30 degrees (preferably approximately 20 degrees) toward the center of the circular knitting machine, and bends at an angle of approximately 90 degrees toward the yarn carrier, to which the guide surface supplies yarn in the back of the cylinder needle, forming a second guide surface.
  • the lower side of the second guide surface is positioned substantially parallel to the needle dial. After that, the second guide surface extends horizontally at about the same height as the stitch bottom of the needle dial.
  • the dropped stitch preventive tool is preferably adjustable vertically, horizontally and depthwise according to the approach angle of the knitting yarn. This structure makes it possible to fine tune the position of the dropped stitch preventive tool.
  • the dropped stitch preventive tool is made of carbon tool steel and has a thickness of 0.1-0.3 mm (preferably 0.2 mm). By using this material and thickness, when the circular knitting machine is in operation, the dropped stitch preventive tool is fastened at the aforementioned position, but when an abnormal event occurs and a foreign body hits the dropped stitch preventive tool, a spring action kicks in and the dropped stitch preventive tool escapes to a different position so as to prevent damage from spreading.
  • the lower side of the second guide surface of the dropped stitch preventive tool may be formed of a linear part such as wire.
  • the lower side of the first guide surface can also be formed of a linear part such as wire.
  • the components can be installed horizontally inverted to obtain the same effect as the present invention.
  • FIG. 3 shows an elevation view of a dropped stitch preventive tool 5 in a first embodiment.
  • FIG. 5 shows a left side view of the dropped stitch preventive tool 5.
  • FIG. 4 is a front view showing the knitting process of quilt knitting of the present invention, which also shows front views of the dropped stitch preventive tool 5.
  • dropped stitch preventive tool 5 is supported by rod 58.
  • the rod 58 has a cylindrical upper part and a flat lower part 581.
  • the dropped stitch preventive tool 5 is attached to the flat lower part 581 of the rod 58 via mounting screws 59.
  • Dropped stitch preventive tool 5 and rod 58 are established adjacent to a yarn carrier 4.
  • rod 58 of the dropped stitch preventive tool 5 is mounted to dropped stitch preventive tool holder 55 via screw 60 in such a way that it can move vertically and rotate.
  • the dropped stitch preventive tool holder 55 is fastened adjustably in the left and right direction of the dropped stitch preventive tool 5 via screw 62 so as to grab yarn carrier ring 6.
  • Screw 63 of the dropped stitch preventive tool holder 55 is mounted adjustably in the direction of the depth of the dropped stitch preventive tool 5.
  • the dropped stitch preventive tool 5 is a plate made of carbon tool steel and has a thickness of approximately 0.2 mm.
  • the dropped stitch preventive tool 5 is located at a feeder where only cylinder needles 1 are in knit-welt positions, and comprises an extension 51 that extends from the top toward the bottom of the cylinder stitch part as well as a formation part 52 that forms first and second guide surfaces 53, 54, which are established at the lower end of this extension.
  • the end of the first guide surface 53 is a protrusion 57 that extends downwards.
  • the protrusion 57 which prevents yarn from loosening and coming off the first guide surface 53, has a height of approximately 1.6 mm.
  • the first guide surface 53 is installed between yarn carrier 4 and cylinder needle 1 that captures the yarn supplied from the yarn carrier 4.
  • the first guide surface 53 of the dropped stitch preventive tool 5 is located just above the hook of cylinder needle 1 at the stitch part and is upwardly slanted by approximately 20 degrees toward the center of the circular knitting machine. If the yarn deflects and strays off point X, it comes back to point X along this slant thanks to the tension of the yarn.
  • the lower side of the second guide surface 54 extends substantially parallel to needle dial D (see FIG. 5 ) and horizontally at about the same height as the height of the stitch bottom of the needle dial D.
  • the second guide surface 54 continues from the first guide surface 53 and bends at an angle of approximately 90 degrees at the dashed and dotted line of FIG. 3 toward the yarn carrier 4.
  • FIG. 4 shows a knitting process of a double knit circular knitting machine (Model V-LEC6BSB, 38-inch, 20-gauge manufactured by Precision Fukuhara Works, Ltd.) for quilt knitting.
  • cylinder needle 1 that is inserted into needle cylinder S (see FIG. 5 )
  • dial needle 2 that is inserted into needle dial D (see FIG. 5 ) are installed in the vertical direction and radial direction of the circular knitting machine respectively in such a way that they face each other.
  • Movement line B2 shown in FIG. 4 shows an example of a movement line of cylinder needle 1
  • movement line A2 shows an example of a movement line of dial needle 2.
  • a yarn carrier 4 for feeding knitting yarn to knitting needles is supported by a yarn carrier holder (not shown).
  • the yarn carrier holder is mounted to a dial cam holder (not shown) or a yarn carrier ring (code 6 of FIG. 7 ).
  • a quilted knit fabric is knitted by selecting cylinder needles 1 and dial needles 2 according to the desired jacquard pattern and inserting filler Y2 between needle cylinder S and needle dial D, thereby selectively connecting the front fabric N1 and back fabric N2.
  • cylinder needles are selected to be in knit-welt positions according to the desired jacquard pattern.
  • the L needles (low butt needles) of the dial are selected to be in support positions (actually selected to be in welt positions without being fed to the dial needle) where dial needles 2 are projected just a little to press the fabric in order to prevent the fabric from being raised together with cylinder needles 1 as cylinder needles 1 ascend, and the H needles (high butt needles) of the dials are selected to be in welt positions.
  • First yarn Y1 (polyester 220dtex) is supplied from the yarn carrier 4 to the selected cylinder needles 1.
  • a pipe yarn carrier 7 is installed, and by means of this yarn carrier 7, filler Y2 (polyester 660dtex) is supplied between verges S1 and D1 of the cylinder and the dial toward the next feeder.
  • cylinder needles 1 are selected to be in knit-welt positions according to the desired jacquard pattern.
  • the L and H needles 2 of the dial are both selected to be in knit positions.
  • Third yarn Y3 (polyester 220dtex) is supplied from the yarn carrier 4 to the selected cylinder needles 1 and to all of the dial needles 2.
  • cylinder needles 1 are selected to be in knit-welt positions according to the desired jacquard pattern.
  • the H needles 2 of the dial are selected to be in support positions where dial 2 is projected just a little to press the fabric in order to prevent the fabric from being raised together with cylinder needles 1 as cylinder needles 1 ascend, and the L needles of the dial are selected to be in welt positions.
  • Fourth yarn Y4 (rayon spun 20s) is supplied from the yarn carrier 4 to the selected cylinder needles 1.
  • a dropped stitch preventive tool 5 for the fourth yarn Y4 that is fed at the third feeder F3 is installed.
  • the fourth yarn Y4 supplied at the third feeder F3 is guided near the intersection X of the first guide surface 53 and the second guide surface 54 of the dropped stitch preventive tool 5 installed between the yarn carrier 4 and the cylinder needle 1 that captures the yarn supplied from the yarn carrier 4, and maintains the same yarn feed angle regardless of the yarn selection that varies according to the desired jacquard pattern. Moreover, even if the fourth yarn Y4 makes a large swing, the second guide surface 54 that is positioned substantially parallel to the needle dial D prevents the fourth yarn Y4 from being routed to the back of the cylinder needle 1 and causing dropped stitches.
  • cylinder needles 1 are selected to be in knit-welt positions according to the desired jacquard pattern.
  • the L and H needles of the dial are both selected to be in knit positions.
  • Fifth yarn Y5 (polyester 167dtex) is supplied from the yarn carrier 4 to the selected cylinder needles 1 and to all of the dial needles 2.
  • the above embodiment is about quilt knitting of a four-color jacquard using all the feeders from the first feeder F1 to the fourth feeder F4, and cylinder needles 1 are selected to be knit positions at least once at any of the feeders from the first feeder F1 to the fourth feeder F4.
  • FIG. 6 shows arrangements of needles at each feeder.
  • the lower series are arrangements of cylinder needles 1 and the upper series are arrangements of dial needles 2.
  • the arrangements of dial needles 2 include two kinds of needles, the L needles and the H needles, which are arranged alternately and selected by 2-race cams.
  • the arrangements of cylinder needles 1 include only one kind of needles, which are selected by computer.
  • a front fabric N1 is jacquard knitted using cylinder needles.
  • filler Y2 is inserted between dial D and cylinder S, and front fabric N1 is jacquard knitted using cylinder needles 1, and back fabric N2 is knitted using all dial needles 2.
  • front fabric N1 is jacquard knitted using cylinder needles 1. As in this embodiment, if the front fabric N1 has long intervals of welts, dropped stitches are likely to occur. To avoid this, a dropped stitch preventive tool 5 is installed between the third feeder and the fourth feeder.
  • front fabric N1 is jacquard knitted using cylinder needles 1
  • back fabric N2 is knitted using all dial needles 2.
  • the dropped stitch preventive tool 5 is installed only between the third feeder F3 and the fourth feeder F4. But when rayon spun yarn is used for the first yarn Y1, it is also possible to install a pipe yarn carrier 7A together with the dropped stitch preventive tool 5 as necessary between the first feeder F1 and the second feeder F2, as shown in FIG. 7 .
  • the pipe yarn carrier 7A is mounted by means of a pipe yarn carrier holder 71 that projects from the lower part of the dropped stitch preventive tool holder 55.
  • the lower side of the second guide surface 54B of dropped stitch preventive tool 5B can be formed of a linear part 56 such as wire to obtain the same effect.
  • the lower sides of the first guide surface and the second guide surface of the dropped stitch preventive tool can all be formed of linear parts such as wire to obtain the effect of this invention. (A shortcoming of this embodiment, however, is that yarn easily coils itself around such linear parts.)
  • FIG. 9 shows (a) a side view and (b) a front view of a dropped stitch preventive tool 5C according to Embodiment 5 with its holder 55C attached to a knitting machine.
  • rod 58C of the dropped stitch preventive tool 5C is mounted to the dropped stitch preventive tool holder 55C via screw 60C in such a way that it can move vertically and rotate.
  • This dropped stitch preventive tool holder 55C is mounted to dial cam holder 6C or a yarn carrier ring (not shown) via screw 61 in such a way that it is adjustable in the left and right direction and in the depthwise direction.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP09715203A 2008-02-26 2009-02-17 Yarn guide in circular knitting machine and knitting method using the yarn guide Withdrawn EP2246465A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008044960A JP2009203566A (ja) 2008-02-26 2008-02-26 丸編機における給糸案内装置及びそれを使用した編成方法
PCT/JP2009/000612 WO2009107338A1 (ja) 2008-02-26 2009-02-17 丸編機における給糸案内装置及びそれを使用した編成方法

Publications (1)

Publication Number Publication Date
EP2246465A1 true EP2246465A1 (en) 2010-11-03

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Application Number Title Priority Date Filing Date
EP09715203A Withdrawn EP2246465A1 (en) 2008-02-26 2009-02-17 Yarn guide in circular knitting machine and knitting method using the yarn guide

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EP (1) EP2246465A1 (ja)
JP (1) JP2009203566A (ja)
CN (1) CN101910490A (ja)
TW (1) TW200940769A (ja)
WO (1) WO2009107338A1 (ja)

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Publication number Priority date Publication date Assignee Title
JP2012255225A (ja) 2011-06-08 2012-12-27 Precision Fukuhara Works Ltd 丸編機における糸案内装置
CN102733057B (zh) * 2012-07-18 2014-06-11 杭州田野提花织造有限公司 用于床垫的阻燃纬编针织提花织物及其制备方法
JP2015083730A (ja) * 2013-09-17 2015-04-30 株式会社福原精機製作所 目割れを低減させた編地、その編成方法及びその編成方法を利用したデザインシステム
TWM557271U (zh) * 2017-05-05 2018-03-21 Tex Tile Enterprise Co Ltd 雙面圓編彈性織品及其製造系統
JP6318332B1 (ja) * 2017-08-18 2018-04-25 村山　修 既設の石炭使用の火力発電装置からｃｏ２を発生させないで発電することを特徴とする発電装置。
CN113186638B (zh) * 2021-04-15 2022-07-05 江南大学 纬编多层衬经衬纬管状织物及其编织方法和专用圆纬机

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JPS5327147U (ja) * 1976-08-06 1978-03-08
JPS6135582Y2 (ja) * 1979-06-19 1986-10-16
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US5109680A (en) * 1990-10-24 1992-05-05 Monarch Knitting Machinery Corporation Method and machine for knitting jacquard pile fabric
IT1309215B1 (it) * 1999-06-11 2002-01-16 Sangiacomo Spa Dispositivo blocca/taglia-filo per machine circolari da calzetteria emaglieria.
JP2002371449A (ja) * 2001-06-12 2002-12-26 Precision Fukuhara Works Ltd キルト編地の編成方法、キルト編地およびこれを用いた製品
ITMI20012776A1 (it) * 2001-12-21 2003-06-21 Santoni & C Spa Dispositivo per la pinzatura del filo in macchine circolari per maglieria calzetteria o simili
JP2005042260A (ja) * 2003-07-24 2005-02-17 Precision Fukuhara Works Ltd 丸編機における給糸切換装置及び方法
JP2008280641A (ja) * 2007-05-10 2008-11-20 Precision Fukuhara Works Ltd 給糸切換機におけるストライプ柄編成装置とその方法

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Publication number Publication date
WO2009107338A1 (ja) 2009-09-03
TW200940769A (en) 2009-10-01
JP2009203566A (ja) 2009-09-10
CN101910490A (zh) 2010-12-08

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