EP2312032B1 - Aiguille a tricoter - Google Patents

Aiguille a tricoter Download PDF

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Publication number
EP2312032B1
EP2312032B1 EP09762257.5A EP09762257A EP2312032B1 EP 2312032 B1 EP2312032 B1 EP 2312032B1 EP 09762257 A EP09762257 A EP 09762257A EP 2312032 B1 EP2312032 B1 EP 2312032B1
Authority
EP
European Patent Office
Prior art keywords
needle
end side
jack
tail end
boring
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.)
Active
Application number
EP09762257.5A
Other languages
German (de)
English (en)
Other versions
EP2312032A4 (fr
EP2312032A1 (fr
Inventor
Hisatoshi Toguchi
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.)
Shima Seiki Mfg Ltd
Original Assignee
Shima Seiki Mfg 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 Shima Seiki Mfg Ltd filed Critical Shima Seiki Mfg Ltd
Publication of EP2312032A1 publication Critical patent/EP2312032A1/fr
Publication of EP2312032A4 publication Critical patent/EP2312032A4/fr
Application granted granted Critical
Publication of EP2312032B1 publication Critical patent/EP2312032B1/fr
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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
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
    • D04B15/70—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used in flat-bed knitting machines
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/06—Sliding-tongue needles

Definitions

  • the present invention relates to a knitting needle that is used while being accommodated in a needle groove of a flatbed knitting machine, and a needle jack is coupled to the needle body having a hook on a front end side.
  • a latch needle which has a latch for opening and closing a hook on a needle body, to which the hook is disposed on the front end side
  • a compound needle for opening and closing a hook by a slider separately located from a needle body for example, see Patent Citations 2 and 3
  • Fig. 6 schematically shows a construction of a compound needle 1 as one example of a knitting needle.
  • This kind of compound needle 1 is shown as a slider needle in Fig. 1 of Patent Citation 3 and the like.
  • Figs. 6(a) and (b) correspond to B and C of Fig. 1 of Patent Citation 3, respectively.
  • the compound needle 1 has a needle body 2 and a slider 3.
  • the needle body 2 has a hook 2a on the front end side.
  • two elastic plates 4 are installed so that they nip the hook 2a and the elastic plates 4 are able to be made sliding shift with respect to the needle body 2 by the drive of a slider butt 5a to be installed to a slider body 5.
  • a tongue 4a is formed on the front end side of the elastic plate 4.
  • a concave portion 2b is disposed, to which a needle jack 6 is coupled.
  • the needle jack 6 is able to move the needle body 2 to be advancing to and retreating from the needle bed gap by driving of a needle jack butt 6a by a cam.
  • the needle jack 6 is coupled to the needle body 2 by setting a convex portion 6b disposed on the front end side of the needle jack 6 into the concave portion 2b of the needle body 2. Constructing a knitting needle by coupling the needle body 2 with the needle jack 6 in this way is popularly practiced in various types of knitting needles as shown in Fig. 2 of Patent Citation 1 and Fig. 2 of Patent Citation 2.
  • the needle jack 6 has a tail portion 6c which bends to have the end portion come in contact with the bottom face of the needle groove and elastically levitates other portions in the needle groove. With the surface side of the tail portion 6c, the front end portion of a select jack whose illustration is omitted comes in contact. Sinking the select jack in the needle groove can sink the needle jack 6 in the needle groove, too, as shown in Fig. 6(b) . Under the condition in which the needle jack 6 sinks in the needle groove, the needle jack butt 6a does not protrude from the needle groove, either, and driving to the needle body 2 does not take place.
  • the needle jack 6 has the front end side makes oscillating shift displaced about the convex portion 6b between Fig. 6(a) and Fig. 6(b) .
  • Fig. 7 is an enlarged view showing the construction of the coupled portion between the needle body 2 and the needle jack 6 of Fig. 6 .
  • the concave portion 2b of the needle body 2 and the convex portion 6b of the needle jack 6 must have the fitted portion to prevent dropping off under the condition with walls by the needle plates on both sides of the needle groove and at the same time must be possible to make oscillating shift as shown in Fig. 6(a), (b) . Consequently, the concave portion 2b and the convex portion 6b have shapes nearly symmetrical with respect to the center line 2c of the concave portion 2b.
  • the concave portion 2b has spacing between the front side end portion 2d of the opening portion and the tail side end portion 2e smaller than the length of the bottom portion.
  • the convex portion 6b has a front end side boring 6d and a tail end side boring 6e in the condition corresponding to the front side end portion 2d and the tail side end portion 2e of the concave portion 2b, respectively.
  • a groove 2f is formed halfway of thickness. To the groove 2f, the topmost front end portion of the needle jack 6 is inserted to prevent the coupled portion from coming off in the direction perpendicular to the paper surface.
  • the convex portion 6b of the needle jack 6 may break due to the stress concentration generated in the vicinity of the tail end side boring 6e. It is prescribed that the shape of the convex portion 6b should secure the strength at the foot with the front end side boring 6d and the tail end side boring 6e set as the minimum. Consequently, at these boring portions, the curvature radius R becomes reduced in size.
  • the needle jack 6 is produced by punching out a metal sheet by precision press working called fine blanking or the like.
  • the edges or the like formed at the time of punching out are removed by finishing by barrel working, for example. Since for barrel working, particulate substances called media are used, the portion of the boring with small curvature radius R is unable to be sufficiently polished and edges may remain. If edges remain, stress might be further concentrated on the edges so that partial crack should be generated and breakage should be possibly reached. In order to sufficiently remove edges, the curvature radius R of the boring portion should be increased. However, in order to increase the boring and at the same time secure the strength of the convex portion 6b at the foot of the needle jack 6, the coupled portion should be increased in size.
  • a knitting needle having a needle body and a needle jack, suitable to be accommodated in a needle groove of a flatbed knitting machine and coupled to each other capable of sliding shift, the needle body having a hook on a front end side and a concave portion disposed in the needle groove depth direction on the tail end side, and the needle jack having a convex portion protruding from the front end side in the depth direction of the needle groove to be fitted into the concave portion of the needle body characterized in that borings disposed on both sides of the foot of the convex portion of the needle jack in such a manner as to form a clearance between the edges of both ends of the concave portion of the needle body, the boring of the tail end side is larger than the boring of the front end side, and the shape of the tail end side boring provided with:
  • the needle jack has a width adding part in which the width in the depth direction of the needle groove increases in the vicinity of the bottom head end having the extension part.
  • the convex portion of the needle jack has the width enlarging part provided with a straight-line shape nearly parallel to the bottom head end.
  • the convex portion of the needle jack has borings of shapes including an extension part, curved part, and width enlarging part on the tail end side which may be subject to large impact force.
  • the shape of the tail end side boring continues from the extension part of the tail end side via the depth direction of the needle groove at the curved part after extending inside an opening of the concave portion from the vicinity of the location facing the edge on the tail end side of the concave portion at the extension part and returns to the tail end side. Since the curved part is located inside the foot of the convex portion by the extension part, the curved part is able to be provided in a space wider than the vicinity of the location of the end of the foot facing to the end of the concave portion.
  • the coupled portion of the knitting needle according to the present invention can avoid stress concentration and is free of large strength drop, and therefore, is suited for speeding up.
  • a width adding part is provided to the needle jack to compensate for strength drop by formation of a large tail end side boring.
  • having a large tail end side boring facilitates punching press of the convex portion of the needle jack.
  • Fig. 1 shows a construction of a compound needle 11 as one embodiment of the present invention by the vicinity of a coupled portion.
  • a needle body 2 equivalent to that of the compound needle 1 of Fig. 6 is used.
  • a slider body 15 also has the basic function equivalent to that of the slider body 5 of the compound needle 1 of Fig. 6 , except for a main butt 15a shown in Fig. 3 corresponding to a butt 5a and having a sub butt 15b separately. That is, the compound needle 11 has the construction other than the needle jack 16 basically equivalent to that of the compound needle 1 of Fig. 6 .
  • the portions equivalent to and corresponding to Fig. 6 are given same reference characters and redundant description may be omitted.
  • a front end side boring 16d and a tail end side boring 16e are provided at the foot of a convex portion 16b of a needle jack 16.
  • the front end side boring 16d and the tail end side boring 16e form a clearance with a front side end portion 2d on the front end side and a tail side end portion 2e on the tail end side of a concave portion 2b of the needle body 2, respectively.
  • the front end side boring 16d is compared with the tail end side boring 16e, the tail end side boring 16e is larger than the front end side boring 16d.
  • the tail end side boring 16e becomes large, the tail end side boring is formed on the tail end side from the center line 2c of the concave portion 2b.
  • Providing this kind of large tail end side boring 16e can relax stress concentration and is able to make the convex portion 16b difficult to break even when an impact load is applied.
  • the width of the convex portion 16b decreases between the front end side boring 16d and the tail end side boring 17e, but if the width at the foot as shown in the figure is secured, strength against a load associated with knitting operation can be sufficiently secured.
  • Fig. 2 shows a condition in which coupling between the needle body 2 and the needle jack 16 of Fig. 1 is released.
  • the upper side of the portion where the tail end side boring 16e of the needle jack 16 is provided that is, the portion which becomes the surface side in the needle groove, has the width adding part 16f added and the width is partially increased. Consequently, the needle jack 16 does not have the width H constant as in the case of the needle jack 6 shown in Fig. 7 , but has the width adding part 16f added to increase the width to compensate for the strength.
  • the tail end side boring 16e includes an extension part 16g, curved part 16h, and width enlarging part 16i.
  • the extension part 16g is formed in a curved line of a comparatively large curvature radius or straight line so that the extension part 16g extends from the vicinity of the location facing the tail side end portion 2e of the concave portion 2b to the inside of the opening.
  • the curved part 16h continues to the extension part 16g and curves from the extension direction to the front end side in the extension part 16g to return in the direction to the tail end side via the depth direction of the needle groove.
  • the curved part 16h curving in this way is formed on the tail end side from the center line 2c of the concave portion 2b. Since the curved part 16h is located not at the foot of the convex portion 16b but at the halfway between the foot and the head end, the curvature radius is increased to avoid stress concentration by the use of a space wider than that at the foot.
  • the width enlarging part 16i is formed to be continuous with the curved part 16h so that the width becomes equal to that of the head end at the halfway between the head end and the foot of the convex portion 16b.
  • the head end of the convex portion 16b is divided into a bottom front end side 16j with which the needle jack 16 comes in contact in the floating condition in the needle groove as in the case of Fig. 6(a) and a bottom tail end side 16k with which the needle jack 16 comes in contact in a slanting condition as in the case of Fig. 6(b) .
  • the bottom of the concave portion 2b is flat whereas the bottom tail end side 16k to the bottom front end side 16j at the head end of the convex portion 16b is tilted so that it corresponds to the oscillating shift angle.
  • the shape on the head end side of this kind of convex portion 16b is same in the convex portion 6b of the needle jack 6 of Fig. 6 .
  • the width enlarging part 16i is nearly parallel to the bottom tail end side 16k.
  • Fig. 3 shows a condition in which the needle jack 16 sinks in the needle groove 20 together with the slider body 15 by the pressing force to the main butt 15a of the slider body 15.
  • the needle groove 20 accommodates the compound needle 11 and guides sliding shift of the compound needle 11 in the right and left direction of Fig. 3 .
  • the needle groove 20 is formed between adjacent needle plates 21 by installing needle plates 21 upright on a needle bed substrate 22 at regular intervals. Under a condition in which the needle jack 16 is floating in the needle groove 20, the slider body 15 is also floating, and the main butt 15a and the sub butt 15b protrude on the upper side from the upper edge of the needle plate 21.
  • a cam that drives the compound needle 11 is mounted to a carriage.
  • the slider body 15 sinks in the needle groove 20 and the needle jack 16 also sinks in the needle groove 20.
  • a width adding part 16f shown in Fig. 2 is able to be installed within a range not interfering with the action as shown in Fig. 3 .
  • the sub butt 15b is installed on the slider body 15 to sink it in the needle groove 20 by pressing force and to stop action of the cam 23 on the main butt 15a.
  • Fig. 4 shows a dimensional example of the coupled portion between the needle body 2 and the needle jack 16 with respect to a compound needle 11 for use in a 12-gauge machine.
  • the needle body 2 and the needle jack 16 are formed with steel sheet of about 0.8 mm thick. In processing of this kind of raw material, the minimum curvature radius becomes about 0.3 mm.
  • These curved parts are formed concurrently with the curvature center located above.
  • the extension part 16g continuing to the lower edge on the front end side of the needle jack 16 is formed in such a manner that the curvature radius R becomes 3 mm from the lower center.
  • the curved part 16h has the curvature radius R of 0.4 mm, which is larger than the minimum curvature radius of 0.3 mm.
  • the center of the curvature of the curved part 16h is located inside the concave portion 2b.
  • Fig. 5 shows a construction of a needle jack 26 in the vicinity of the front end as the other embodiment of the present invention.
  • the needle jack 26 is able to form a knitting needle by coupling with the needle body 2 as in the case of the needle jack 16 of Fig. 1 .
  • the needle jack 26 nothing that corresponds to the width adding part 16f such as needle jack 16 is provided.
  • the front end side boring 26d, bottom front end side 26j and bottom tail end side 26k are equivalent to the front end side boring 16d, bottom front end side 16j, and bottom tail end side 16k of the needle jack 16, respectively.
  • the tail end side boring 26e has an extension part 26g, a curved part 26h, and a width enlarging part 26i.
  • the curvature radius of the curved part 26h becomes larger than the curvature radius of the curved part 16 h and is 0.5 mm.
  • the shape of the needle jack 6 is shown by a broken line. That is, the needle jack 26 has a shape that can be formed by post-machining, too, so that a tail end side boring 26e is able to be added to the needle jack 6. However, as shown in Fig. 5(a) , the shape of the width enlarging part 26i becomes a curved boring to the protruded head end of the convex portion 26b, which is difficult to manufacture by punching press.
  • the needle jack 16 of Fig. 1 , the needle jack 26 of Fig. 5 , and the needle jack 6 of Fig. 6 are able to be compared by simulation in the stress concentration condition at the time of impact load.
  • the knitting needle is subject to the maximum impact load when the knitting yarn supplied to a hook advanced to the needle bed gap is drawn in by allowing the stitch cam to work on the butt. Simulating this kind of condition by the use of the finite element method indicates that stress is dispersed to the extension part 16g, 26g and the curved part 16h, 26h. It has been identified that by the stress dispersion, the maximum stress is reduced by about 20% in the needle jack 16 and by about 14% in the needle jack 26 as compared to the needle jack 6.
  • the curvature radius of the curved part 16h and 26h increases thus, the edge tends not to remain. Consequently, even when the knitting operation speed is increased, applying the present invention can reduce the impact force, can avoid stress concentration, and can make the convex portion 6b of the needle jack 6 difficult to break.
  • the present invention is applied to a compound needle as described in Patent Citation 3.
  • the slider body 15 two slider butts of the main butt 15a and the sub butt 15b are provided, but this is equivalent with respect to the coupled portion even when one slider butt 5a is provided as in the case of the slider body 5 of Patent Citation 3.
  • the preset invention is not limited to these compound needles but is able to be applied to other types of knitting needles, such as the latch needle of Patent Citation 1 and the compound needle of Patent Citation 2.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Claims (3)

  1. Aiguille à tricoter (1), comportant un corps d'aiguille (2) et un levier d'aiguille (16, 26) couplés entre eux, apte à être accueillie dans une gorge d'aiguille d'une machine à tricoter à plat et pouvant se déplacer en coulissant,
    le corps d'aiguille (2) comportant un crochet sur le côté d'extrémité avant et une portion concave (2b) disposée dans la direction de la profondeur de la gorge d'aiguille sur le côté d'extrémité arrière, et le levier d'aiguille (16, 26) comportant une portion convexe (16b, 26b) faisant saillie à partir du côté de l'extrémité avant dans la direction de la profondeur de la gorge d'aiguille pour s'adapter dans la portion concave (2b) du corps d'aiguille (2), dans laquelle des alésages (16d, 26d ; 16e, 26e) sont disposés sur les deux côtés du pied de la portion convexe (16b, 26b) du levier d'aiguille (16, 26) de façon à former un jeu entre les bords des deux extrémités de la portion concave (2b) du corps d'aiguille (2), caractérisé en ce que l'alésage (16e, 26e) du côté de l'extrémité arrière est plus grand que l'alésage (16d, 26d) du côté de l'extrémité avant, et la forme de l'alésage du côté de l'extrémité arrière est munie :
    d'une partie d'extension (16g, 26g) ayant une forme en ligne courbe ayant un rayon de courbure relativement grand ou en ligne droite afin que la partie d'extension (16g, 26g) s'étende à partir du voisinage de l'emplacement opposé à la portion d'extrémité du côté arrière (2e) de la portion concave (2b) jusqu'à l'intérieur de l'ouverture,
    d'une partie courbe (16h, 26h) continuant à partir de la partie d'extension (16g, 26g), sur le côté de l'extrémité arrière d'une ligne centrale de la portion concave (2b), suivant la direction d'extension via la direction de la profondeur de la gorge d'aiguille, et revenant vers la direction du côté de l'extrémité arrière ; et
    une partie d'élargissement (16i, 26i) continuant la partie courbe (16h, 26h) de telle sorte que la largeur dans la direction de la longueur de la gorge d'aiguille s'élargit pour être égale à celle d'une extrémité de tête (16j, 16k, 26j, 26k) de la portion convexe (16b, 26b) à mi-chemin entre l'extrémité de tête et le pied de la portion convexe (16b, 26b).
  2. Aiguille à tricoter selon la revendication 1, dans laquelle le levier d'aiguille (2) comporte une partie d'ajout de largeur (16f) sur son côté de bord supérieur dans laquelle la largeur dans la direction de la profondeur de la gorge d'aiguille augmente au voisinage de l'endroit où l'alésage du côté de l'extrémité arrière comporte la partie d'extension (16g, 26g) .
  3. Aiguille à tricoter selon les revendications 1 ou 2,
    dans laquelle la portion convexe (2b) du levier d'aiguille (2) a sa partie d'élargissement (16i, 26i) en forme de ligne droite presque parallèle à l'extrémité de tête.
EP09762257.5A 2008-06-13 2009-06-09 Aiguille a tricoter Active EP2312032B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008155982 2008-06-13
PCT/JP2009/002599 WO2009150826A1 (fr) 2008-06-13 2009-06-09 Aiguille à tricoter

Publications (3)

Publication Number Publication Date
EP2312032A1 EP2312032A1 (fr) 2011-04-20
EP2312032A4 EP2312032A4 (fr) 2013-09-11
EP2312032B1 true EP2312032B1 (fr) 2014-10-08

Family

ID=41416539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09762257.5A Active EP2312032B1 (fr) 2008-06-13 2009-06-09 Aiguille a tricoter

Country Status (4)

Country Link
EP (1) EP2312032B1 (fr)
JP (1) JP5330383B2 (fr)
CN (1) CN102046868B (fr)
WO (1) WO2009150826A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103173926B (zh) * 2013-04-03 2014-07-30 桐乡市巨星针织机械制造有限公司 一种编织横机的针织结构
CN103451845B (zh) * 2013-08-09 2015-05-20 绍兴县大纬针织机械有限公司 全成形电脑针织横机复合针

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331940C1 (de) * 1993-09-21 1994-12-15 Groz & Soehne Theodor Umhängenadel
JP2946323B2 (ja) * 1997-05-01 1999-09-06 株式会社島精機製作所 横編機の複合針
JP2917146B2 (ja) * 1997-07-11 1999-07-12 株式会社島精機製作所 編目形成方法及び該編目形成のための横編機
KR100906752B1 (ko) * 2001-08-24 2009-07-09 가부시키가이샤 시마세이키 세이사쿠쇼 편기의 복합침
CN2813659Y (zh) * 2005-07-29 2006-09-06 冯加林 具有多段压针密度的织针和含有三针踵挺针片的辅针组合

Also Published As

Publication number Publication date
CN102046868A (zh) 2011-05-04
CN102046868B (zh) 2012-08-29
EP2312032A4 (fr) 2013-09-11
EP2312032A1 (fr) 2011-04-20
JPWO2009150826A1 (ja) 2011-11-10
WO2009150826A1 (fr) 2009-12-17
JP5330383B2 (ja) 2013-10-30

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