EP2161359B1 - Stripe pattern knitting device in feed changer, and method therefor - Google Patents

Stripe pattern knitting device in feed changer, and method therefor Download PDF

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Publication number
EP2161359B1
EP2161359B1 EP08751639.9A EP08751639A EP2161359B1 EP 2161359 B1 EP2161359 B1 EP 2161359B1 EP 08751639 A EP08751639 A EP 08751639A EP 2161359 B1 EP2161359 B1 EP 2161359B1
Authority
EP
European Patent Office
Prior art keywords
yarn
knitting
changer
yarn feed
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.)
Not-in-force
Application number
EP08751639.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2161359A1 (en
EP2161359A4 (en
Inventor
Yasuo Nakamura
Masayoshi Hijikigawa
Shingo Sasaki
Shunji Takeuchi
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 EP2161359A1 publication Critical patent/EP2161359A1/en
Publication of EP2161359A4 publication Critical patent/EP2161359A4/en
Application granted granted Critical
Publication of EP2161359B1 publication Critical patent/EP2161359B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
    • D04B15/60—Thread guides for circular knitting machines; Thread-changing devices with thread-clamping or -severing devices
    • D04B15/61—Thread guides for circular knitting machines; Thread-changing devices with thread-clamping or -severing devices arranged within needle circle
    • 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
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
    • D04B15/60—Thread guides for circular knitting machines; Thread-changing devices with thread-clamping or -severing devices

Definitions

  • the present invention relates to a circular knitting machine and a method for knitting stripe patterns using that circular knitting machine equipped with yarn feed changers capable of knitting stripe patterns.
  • Patent Document 1 in order to knit a stripe pattern using a circular knitting machine, yarns that are selectively fed by a yarn feed changer installed on the circular knitting machine are fed to knitting needles and formed into a fabric.
  • the invention according to Patent Document 1 below is not capable of changing a number of yarns exceeding the number of fingers arranged in a yarn feed changer, whereas the invention according to Patent Document 2 is capable of doing that.
  • Patent Document 2 JP-A-2006-16747
  • Patent Document 2 describes a circular knitting machine in which a engaging member 81 equipped with a clamping organ 81 a that automatically tightens yarn is allocated to a stripe patterning attachment, and an opening organ 85 is fastened on the back of a yarn guide.
  • These components 81 a and 85 are made of spring wire.
  • protrusions such as the aforementioned made of wire can cause an injury to the operator at work.
  • Other objects of the present invention are to feed a knitting yarn to a yarn carrier without fail when changing yarns, thereby preventing malfunction of the knitting machine when knitting a fabric, and to ensure the safety of the operator by eliminating protrusions.
  • the present invention is a mechanism for knitting stripe patterns in a yarn feed changer in a circular knitting machine having yarn feed changers that change at least two knitting yarns, comprising: a first yarn feed changer established in a first feeder and having a plurality of yarn feed fingers that are selectively moved; a second yarn feed changer established in a second feeder and having a plurality of yarn feed fingers that are selectively moved; a yarn cutter and a yarn catcher for retaining and cutting an old knitting yarn that ceases to be fed after a new knitting yarn is fed to a knitting needle from the first and second yarn feed changers and formed into a loop; a yarn carrier that is established opposite the second feeder and feeds a yarn to a knitting needle; and a trapper that moves in the circumferential direction along with the rotation of the knitting machine and catches the yarn that is at the feed position and feeds the same to the knitting needle; characterized in that when any of the yarn feed fingers of the first yarn feed changer moves to the yarn feed position for newly feeding a yarn to the knitting needle, the newly fed yarn
  • the present invention is also a method for knitting stripe patterns in a circular knitting machine having yarn feed changers that change at least two knitting yarns, in which a first feeder having a first yarn feed changer and a second feeder having a second yarn feed changer are used to knit one course, comprising: a step in which welt needle selection is performed by the first feeder; a step in which, when a knitting yarn is newly fed to a knitting needle from the first yarn feed changer, the knitting yarn caught by a trapper stably retains the angle at which it enters the yarn carrier; and a step in which, after new knitting yarns are fed to the knitting needles from the first and second yarn feed changers and formed into loops, old knitting yarns that cease to be fed are retained and cut at approximately the same position.
  • the present invention when the manufacture of fabrics using a number of knitting yarns (color yarns) that exceeds the number of yarn feed fingers arranged in a yarn feed changer is desired using a circular knitting machine equipped with such a yarn feed changer, it is possible to manufacture stripe pattern fabrics by using two or more yarn feed changers and changing the multiple color knitting yarns. Moreover, when changing the yarns, it is possible to feed the knitting yarn to the yarn carrier without fail, thereby preventing malfunction of the knitting machine during the knitting process. According to the present invention it is also possible to ensure the safety of the operator by eliminating protrusions.
  • the present invention can be achieved, while using a circular knitting machine equipped with a conventional yarn feed changer, by simply modifying a part of the yarn feed changer. There is no need to newly install a special device.
  • the yarn feed changer of the present invention the one that is described in JP-A-2005-42260 can be used.
  • This yarn feed changer can be used in either a double knit circular knitting machine or a single knit circular knitting machine.
  • a first feeder and a second feeder are used to knit one course. So for example, if a yarn feed changer equipped with three yarn feed fingers is used (for each feeder), it is possible to knit a multiple color stripe pattern with six color knitting yarns.
  • the first feeder performs welt needle selection. For this reason, this part of yarn carrier is removed.
  • a yarn guide is provided between the first yarn feed changer established in the first feeder and the second yarn feed changer established in the second feeder.
  • the yarn guide is preferably provided with a guide plane and a retaining part
  • the guide plane helps the knitting yarn caught by the trapper that moves in sync with the rotation of the knitting machine to go up.
  • the retaining part stably retains the angle at which this knitting yarn enters the yarn carrier.
  • said trapper has a protrusion at its lower end.
  • the device of the present invention is equipped with sets of yarn cutters and a yarn catcher that retain and cut old yarns that cease to be fed after new knitting yarns are fed to the knitting needles from the first and second yarn feed changers and formed into loops.
  • Switch cams for opening and closing these have protrusions at different positions in the first yarn feed changer and the second yarn feed changer.
  • Two kinds of cutter cams are provided, one for the first yarn feed changer and the other for the second yarn feed changer, each corresponding to the respective protrusion positions of the switch cams.
  • the positions of the first cutter cam for the first yarn feed changer and the second cutter cam for the second yarn feed changer are set so that after new knitting yarns are fed to the knitting needles from the first and second yarn feed changers and formed into loops, old knitting yarns that cease to be fed are retained and cut at the same position.
  • the distance between the first cutter cam and the second cutter cam equals the distance between each feeder, and the lower surfaces of the cutter cams have angles that correspond to the inclinations of the switch cams.
  • knitting yarns are not knit at the first feeder that is in welt needle selection. For this reason, the knitting yarn fed from the first yarn feed changer of the first feeder is fed to the knitting needle that is in knit needle selection or tuck needle selection in the second feeder. Therefore, the position of the first cutter cam is shifted so that the (old) knitting yarn that was being fed from the first yarn feed changer is retained by the yarn catcher for the yarn feed fingers of the yarn feed changer and cut by a moving blade after a new knitting yarn passes the stitch point of the second feeder and overlaps the old knitting yarn at the yarn changing part of the fabric.
  • FIG. 1 is a cross section of the core part of a knitting head of a double knit knitting machine, in which the knitting head 31 is established above a bed 30 supported by a plurality of legs (not shown).
  • code 33 refers to a needle cylinder.
  • a vertically slidable cylinder needle (not shown) is housed in the upper part of a needle groove (not shown) formed in the periphery of the needle cylinder 33.
  • the cylinder needle is activated by a cam (not shown) housed in a cam holder 34 and moves up and down.
  • the machine shown in FIG. 1 is a double knit circular knitting machine, it is further equipped with a needle dial 35 and a dial cam holder 36.
  • a needle dial 35 Along needle grooves formed on the upper surface of the needle dial 35, dial needles (not shown) are slidably housed in the horizontal direction.
  • the dial needles are activated by cams (not shown) housed in the dial cam holder 36 and move back and forth horizontally.
  • a yarn carrier 37 is installed on the dial cam holder 36, and this yarn carrier 37 feeds yarn to the knitting needles.
  • the driving gear 38 rotates at the same speed as the needle cylinder 33 when driven by the driving source installed in the knitting machine.
  • a yarn feed changer 40 is installed above the dial cam holder 36.
  • the yarn feed changer 40 is provided with a plurality of yarn feed fingers for guiding a plurality of individual knitting yarns.
  • the yarn feed fingers operate in two steps: first moving downwards, then retreating upwards. Moving selectively between the low position, i.e., the yarn changing position, and the high position, i.e., the normal position, the yarn feed fingers feed the knitting yarns to the knitting needles.
  • the actuator 1 rotating at the same speed as the knitting machine is established.
  • the actuator 1 has a peg 1-1 using a piezoelectric element having a number of steps equaling the total of the number of steps corresponding to the number of yarns used for one yarn feed outlet and one special step for putting all yarns into a non yarn feeding condition.
  • the selector unit 21 is made up of a select lever 21-1, a rocking bar 21-2, a slider 21-3, a switch plate 21-4 and a switch cam 21-5.
  • the select lever 21-1 is engaged and pushed in when the peg 1-1 moves in response to the signal for either yarn feeding or non yarn feeding.
  • the rocking lever 21-2 is positioned in the same space as the select lever 21-1 and is pushed in by the select lever 21-1 to rock around an engaging part 21-2b.
  • the slider 21-3 is positioned in the same space as the rocking bar 21-2, engages with the rocking bar 21-2 at said engaging part 21-2b, and moves together with the rocking bar 21-2.
  • the slider 21-3 is provided with a long hole 21-3a. Inside the long hole, a pin 21-3b is fastened, so that the slider 21-3 can move horizontally over the distance of this long hole.
  • the switch plate 21-4 is positioned in the same space as the slider 21-3, engages with the slider 21-3 via a joint 21-4a, and moves together with the slider 21-3.
  • a first cam 2 and a second cam 3 engage with a butt 21-2a and a butt 21-2b, which are at the left end and the right end of the rocking bar 21-2 respectively, and move the rocking bar 21-2 to the yarn feed position or the non yarn feed position.
  • a third cam 4 (hereinafter referred to as "cutter cam 4") pushes in the switch cam 21-5 that is raised.
  • a fourth cam 22 pushes down the butt 21-2a, which is at the left end of the rocking bar 21-2.
  • Pushed down by the cutter cam 4 ("third cam") via the switch cam 21-5 and the switch plate 21-4 are a switch lever cam 5, a first link plate 6 that is linked to the switch lever cam 5, and a second link plate 7 that is linked to the first link plate 6.
  • a switch lever 8 is linked to the first link plate 6 and the second link plate 7.
  • a third link plate 9 is linked to the switch lever 8. Because the switch lever 8 is rotatable around a fulcrum 8-1, the third link plate 9 moves in the opposite direction from the second link plate 7.
  • a long hole 24-1 provided in a housing plate 24 functions as the rotation guide.
  • Code 10 is a spring for returning the components moved by the cutter cam 4 ("third cam") to their original positions.
  • a fourth link plate 11 is positioned in the same space as the slider 21-3, engages with the slider 21-3 via a joint 11-1, and swings together with the slider 21-3.
  • the fourth link plate 11 is rotatable around a fulcrum 11-2.
  • a fifth link plate 12, which engages with the fourth link plate 11 via a joint 11-3 and swings, and a sixth link plate 13, which engages with the fifth link plate 12 via a joint 12-2 and swings, are provided respectively.
  • the fifth link plate 12 is rotatable around a fulcrum 12-1.
  • the finger unit 14 is made up of a fixed blade 14-1 for cutting the yarn that has been fed, a yarn catcher 14-3 for retaining the end of the yarn, a moving blade 14-2 for cutting the yarn that is retained in contact with the fixed blade 14-1, and a case 14-4 for retaining the yarn catcher 14-3 and the moving blade 14-2 while at the same time opening and closing them repeatedly.
  • a first pin 19 Connected to the tip of the second link plate 7 is a first pin 19, which pushes down a protrusion 14-4a of the case 14-4 and closes the yarn catcher 14-3 and the moving blade 14-2 together with the case 14-4, thereby retaining and cutting the yarn.
  • a second pin 20 Connected to the tip of the third link plate 9 is a second pin 20, which pulls up a protrusion 14-4b of the case 14-4 and opens the yarn catcher 14-3 and the moving blade 14-2 together with the case 14-4, thereby releasing the retained yarn.
  • Other components include a trapper 15 and a yarn guide 16 such as those shown in FIG. 5 .
  • a protrusion 15-1 it is preferable to provide a protrusion 15-1 at the tip of the trapper.
  • the trapper 15 moves in the circumferential direction along with the rotation of the knitting machine, catches the yarn at the yarn feed position, and feeds the yarn to the knitting needle without fail.
  • the yarn guide 16 separates a plurality of yarns and stabilizes their positions.
  • the yarn guide 16 used in this example is a long and narrow plate provided with an indentation and a protrusion on the side facing the outside of the knitting machine.
  • the indentation and protrusion includes a guide plane 16-1 made up of an upward slope and an elevated part, and a retaining part 16-2, which is an indentation provided above said guide plane.
  • FIG 6 (b) shows how yarns are changed in a conventional changing method.
  • yarn feed changers 40 each having three yarn feed fingers 14 are installed on a first feeder F1 and a second feeder F2 respectively.
  • FIG. 6 (a) shows how yarns are changed using the changing method of the present invention.
  • yarn feed changers 40-1 and 40-2 are installed on a first feeder F1 and a second feeder F2 respectively.
  • a yarn guide 16 Between the first yarn feed changer 40-1 and the second yarn feed changer 40-2, however, is a yarn guide 16, while the yarn carrier for the first feeder is removed to allow welt needle selection, making this method different from that of the prior art.
  • the knitting yarn that is fed from the first yarn feed changer 40-1 is fed to the second feeder F2 without being knit at the first feeder F1, which is in welt needle selection. For this reason, when a newly fed knitting yarn reaches position A, the yarn is not changed satisfactorily at the normal position at which the cutter operates because timing is too early. It should be arranged so that yarn change takes place when a newly fed knitting yarn reaches position B.
  • the opening and closing motions of the yarn cutter 14-1, 14-2 and the yarn catcher 14-3 are effected by the actions of the switch cams 21-5 and the cutter cams 4.
  • the positions of the protrusions of the switch cams 21-5 for opening and closing these are different in the first yarn feed changer 40-1 and the second yarn feed changer 40-2.
  • the arrangement of the two kinds of switch cams, 21-5a and 21-5b, and two kinds of cutter cams, 4-1 and 4-2, is important.
  • the first switch cam 21-5a and the second switch cam 21-5b are arranged in the upper parts of the first and second yarn feed changers 40-1 and 40-2.
  • FIGs. 2 (d) and (e) are arrow views of FIGs. 2 (a) and (c) respectively, showing the arrangement of the cutter cams 4-1, 4-2 and the standard cutter cam 4.
  • the arrows in FIGs. 2 (d) and (e) indicate the rotational directions of the circular knitting machine.
  • the distance between the first cutter cam 4-1 and the second cutter cam 4-2 in FIG. 2 (a) is the distance between each feeder, which is the same as the distance between A and B in FIG. 6 (a) or the distance between X and X in FIG. 6 (b) .
  • the first cutter cam 4-1 and the second cutter cam 4-2 are mounted on the knitting machine in such a way that the distance between them is adjustable.
  • the lower surfaces of the cutter cams 4-1 and 4-2 have angles that correspond to the inclinations of the switch cams 21-5a and 21-5b.
  • the knitting yarn that was fed from either of the first and second yarn feed changers 40-1 and 40-2, i.e., old yarn, is retained and cut at position B in FIG. 6 (a) .
  • FIG. 5 (a) shows how a knitting yarn fed from the first yarn feed changer 40-1 to the yarn carrier 37 is changed.
  • the end of the yarn held by the yarn catcher 14-3 is released as the yarn catcher 14-3 opens.
  • the old yarn OY that was being knit is retained and cut, allowing the knitting yarn to enter the opening of the yarn catcher 14-3, and as shown in FIG. 2 , the cutter cams 4-1 and 4-2, moving at the same speed as the knitting machine in the circumferential direction, push down the switch cams 21-5a and 21-5b, thereby closing the yarn catcher 14-3 and the moving blade 14-2 via link parts 6, 7, 8 and 9.
  • the present invention can be carried out in a conventional circular knitting machine by modifying part of it, and it is also possible to revert the machine of the present invention to a conventional machine.
  • the standard cutter cam 4 (See FIG. 2 (c) ) is arranged so that it acts on the first switch cam 21-5a and the second switch cam 21-5b at the same timing when the knitting yarn reaches position X shown in FIG. 6 (b) .
  • the standard cutter cam 4 is desirably designed wide enough so that it acts on the protrusions of both the first switch cam 21-5a and the second switch cam 21-5b.
  • FIG. 2 (c) shows both the first switch cam 21-5a and the second switch cam 21-5b for convenience, in fact, the first switch cam 21-5a is built into the first yarn feed changer 40-1 and the second switch cam 21-5b is built into the second yarn feed changer 40-2.
  • the stripe pattern knitting apparatus of the present invention can also be installed on a single knit machine.
  • FIG. 4 is a cross section of the core part of a knitting head of a single knit machine, in which the knitting head 32A is established above a bed 31A supported by a plurality of legs (not shown).
  • code 33A refers to a needle cylinder. Housed in a needle groove (not shown) formed in the periphery of the needle cylinder 33A is a vertically slidable cylinder needle (not shown).
  • the machine shown in FIG. 4 is a single knit machine, it is further equipped with a sinker dial 41 and a sinker cap 42.
  • a sinker 43 which cooperates with the cylinder needle (not shown), is provided so that it is radially slidable on the sinker dial 41, which is arranged horizontally.
  • the sinker 43 is controlled by a sinker cam 44, which is attached to the sinker cap 42.
  • the sinker cap 42 is supported by an annular sinker cap ring 45, which is supported by an intermediate ring 47 via a support 46.
  • a yarn carrier holder 48 for mounting a yarn carrier 37A that feeds yarn to the knitting needle is established and attached to a yarn carrier ring 47.
  • the driving gear 38A rotates at the same speed as the needle cylinder 33A when driven by the driving source installed in the circular knitting machine.
  • the yarn feed changer 40A is provided with a plurality of yarn feed fingers 14A for guiding a plurality of individual knitting yarns.
  • the yarn feed fingers operate in two steps: first moving downwards, then retreating upwards. Moving selectively between the low position, i.e., the yarn changing position, and the high position, i.e., the normal position, the yarn feed fingers feed the knitting yarns to the knitting needles.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Knitting Of Fabric (AREA)
EP08751639.9A 2007-05-10 2008-04-28 Stripe pattern knitting device in feed changer, and method therefor Not-in-force EP2161359B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007125712A JP2008280641A (ja) 2007-05-10 2007-05-10 給糸切換機におけるストライプ柄編成装置とその方法
PCT/JP2008/001114 WO2008139713A1 (ja) 2007-05-10 2008-04-28 給糸切換機におけるストライプ柄編成装置とその方法

Publications (3)

Publication Number Publication Date
EP2161359A1 EP2161359A1 (en) 2010-03-10
EP2161359A4 EP2161359A4 (en) 2011-03-16
EP2161359B1 true EP2161359B1 (en) 2015-07-29

Family

ID=40001938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08751639.9A Not-in-force EP2161359B1 (en) 2007-05-10 2008-04-28 Stripe pattern knitting device in feed changer, and method therefor

Country Status (6)

Country Link
EP (1) EP2161359B1 (ja)
JP (1) JP2008280641A (ja)
KR (1) KR101470668B1 (ja)
CN (1) CN101680141B (ja)
TW (1) TWI444514B (ja)
WO (1) WO2008139713A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009203566A (ja) * 2008-02-26 2009-09-10 Precision Fukuhara Works Ltd 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
DE102009040739A1 (de) 2009-09-08 2011-03-10 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Verfahren und Strickmaschine zur Herstellung von Strickwaren mit Ringelmustern
EP2374920B1 (en) * 2010-04-12 2014-11-05 Pai Lung Machinery Mill Co., Ltd. Circular knitting machine having integrated multiple yarn changing apparatus
CN107829205B (zh) * 2017-12-14 2023-07-04 唐山雾谷机电设备有限公司 换线器的喂纱结构
CN107881640B (zh) * 2017-12-14 2023-07-04 唐山雾谷机电设备有限公司 换线器的导纱结构
CN108411480B (zh) * 2018-04-28 2024-01-23 黄创能 一种针织机变色头结构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511949B4 (de) * 1995-03-31 2009-10-15 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Strickmaschine und Fadenwechselvorrichtung
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
DE102004032270A1 (de) * 2004-06-30 2006-01-19 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Strickmaschine mit wenigstens einem Ringelapparat

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Publication number Publication date
TWI444514B (zh) 2014-07-11
EP2161359A1 (en) 2010-03-10
KR20100017329A (ko) 2010-02-16
JP2008280641A (ja) 2008-11-20
KR101470668B1 (ko) 2014-12-08
EP2161359A4 (en) 2011-03-16
WO2008139713A1 (ja) 2008-11-20
CN101680141B (zh) 2012-05-23
TW200912066A (en) 2009-03-16
CN101680141A (zh) 2010-03-24

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