EP2458051B1 - Compound needle for flatbed knitting machine - Google Patents

Compound needle for flatbed knitting machine Download PDF

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Publication number
EP2458051B1
EP2458051B1 EP11009236.8A EP11009236A EP2458051B1 EP 2458051 B1 EP2458051 B1 EP 2458051B1 EP 11009236 A EP11009236 A EP 11009236A EP 2458051 B1 EP2458051 B1 EP 2458051B1
Authority
EP
European Patent Office
Prior art keywords
needle
joining
groove
opening
concave
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
EP11009236.8A
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German (de)
English (en)
French (fr)
Other versions
EP2458051A2 (en
EP2458051A3 (en
Inventor
Minoru Sonomura
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.)
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Publication date
Application filed by Shima Seiki Mfg Ltd filed Critical Shima Seiki Mfg Ltd
Publication of EP2458051A2 publication Critical patent/EP2458051A2/en
Publication of EP2458051A3 publication Critical patent/EP2458051A3/en
Application granted granted Critical
Publication of EP2458051B1 publication Critical patent/EP2458051B1/en
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Classifications

    • 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 compound needle for a flatbed knitting machine, the compound needle being put in a needle groove formed in a needle bed of the flatbed knitting machine to open and close a hook with a slider.
  • a large number of needle grooves are arranged in line on a needle bed, and a knitting needle put in each of the needle grooves is driven in such a way that a hook at a front end moves to and back from a needle bed gap at a tip end of the needle bed, and a fabric is knitted with a knitting yarn supplied to the hook in the needle bed gap.
  • the knitting needle there is a compound needle that opens and closes a hook with a slider. More particularly, if a tongue, which is a portion to open and to close a hook with a slider, would be formed of two blades, the tongue might be capable of moving beyond the hook, and transferring using the slider is also might be possible (for example, see Patent Literature 1).
  • the needle bed of the flatbed knitting machine is tilted in such a way that its needle bed gap side is high and becomes lower as apart from the needle bed gap.
  • the longitudinal direction is determined in such a way that the needle bed gap side is the front and the side where the needle bed is apart from the needle bed gap is the back.
  • the vertical direction, vertical to the longitudinal direction is determined in such a way that the direction in which a tongue floats in the needle groove is the upper side and the direction in which the tongue sinks in the needle groove is the lower side.
  • the widthwise direction of the needle groove seen from the front is the lateral direction.
  • the needle bed and the needle groove are omitted in the drawings.
  • Figs. 3 show partial structures of a slider of a compound needle having a tongue formed at a front end of two blades, as disclosed in Patent Literature 1, for example.
  • Fig. 3(a) shows a structure on a left side of a base body 1 and a cross sectional structure of the base body 1 seen on a cutting surface line A-A.
  • the cross sectional structure of this part is asymmetric to a center line 1a.
  • a butt 1b is projected from a rear portion of the base body 1, and guided by a cam mounted on a carriage moved along a needle bed.
  • An upper joining part 1c provided between a forward portion and the rear portion of the base body 1, has a longitudinal groove 1d faced on a left side and a concave positionle opening to both right and left lateral side to make a continuous connection.
  • an arm 1f is formed to be capable of elastic bending to deform. It is noted that the arm 1f is shown to be shortened in the longitudinal direction thereof.
  • Fig. 3(b) shows a plan structure of a right side blade 2 and a left side structure thereof.
  • Fig. 3(c) shows a plan structure of a left side blade 3 and a left side structure thereof.
  • Fig. 3(d) shows a plan structure of a slider 4 and a left side structure thereof.
  • Fig. 3(e) shows with enlargement the joining portion 5 for the base body 1 and the blades 2, 3 shown in Fig. 3(d) .
  • the slider 4 of the compound needle is formed by joining the base body 1, formed of a metal plate by press working, to the two blades 2, 3 using the joining portion 5.
  • the blades 2, 3 have tongues 2a, 3a, respectively, at front portions.
  • the lower portions of the blades 2, 3 are put in a slider groove, not shown in the drawing, the slider groove being formed in a needle body.
  • the blades 2, 3 relatively move forward and back in the slider groove to open and close a hook of the needle body with the tongues 2a, 3a.
  • the blades 2, 3 are formed with curving portions 2b, 3b subsequent to the tongues 2a, 3b, respectively, upper ends of the curving portions 2b, 3b being opened to the outside of the slider groove.
  • Lower joining part 2c, 3c are provided on rear portions of the blades 2, 3, respectively.
  • the lower joining parts 2c, 3c respectively have joining butts 2d, 3d and tail portions 2e, 3e extending to rearward.
  • arms 2, 3f are provided and forward portions thereof are capable of rocking by elastic deformation.
  • the tail portion 3e of the blade 3 swells to the lateral side in such a way that the tail portion 3e to make slide contact with a side wall of the needle groove in an elastic manner to provide sliding resistance.
  • the concave position 1e of the base body 1 and the joining butts 2d, 3d of the blades 2, 3 are joined to each other, and swaging positions 5a, 5b, 5c are provided circumferentially to form strong joint so as not to allow the removal of the components.
  • Patent Literature 1 Japanese Patent No. 2946323
  • Prior art document JP 2001 032154 A discloses a compound needle with a needle body and a slider.
  • the needle body is received in a needle groove formed in the needle bed of a flat knitting machine, has a hook portion formed at the tip, and further has a throat portion and a cheek portion formed at the next positions.
  • the slider has two blades at whose tips tongues are formed.
  • the needle body and the slider are relatively moved to open or close the hook by the actions of the tongues disposed at the tip of the slider.
  • the tongues can be moved over the hook for the transfer of loops.
  • at least both the side surfaces of the needle body including the cheek portion are removed, while leaving the lower edge portion, thus forming a guide portion comprising a thin portion and a step portion there.
  • the blades of the slider are slid and supported on the step portion, and the slider is combined with the needle body so as to nip the thin portion with the blades.
  • the needle part has a needle shaft and a needle hook, the needle shaft being provided with a slot-shaped recess and a guide channel.
  • the slide part has a slide shaft, which is insertable into the guide channel and is movable to and fro in the latter, and a slide hook which is open in the opposite direction to the needle hook, said slide hook being insertable into the recess in order to take over a stitch located on the needle shaft.
  • the guide channel is provided with a cover bridging the slide shaft at least on a part of its length, and the thickness of the slide hook is greater at least in a spread portion taking over the stitch and keeping it wide than the width of the guide channel, and/or the thickness of the needle hook is smaller than the thickness of the needle shaft.
  • the longitudinal groove 1d and the concave position 1e of the upper joining part 1c are formed slightly larger than the joining butts 2d, 3d of the lower joining parts 2c, 3c, and the tail portions 2e, 3e. Therefore, the joining butts 2d, 3d and the tail portions 2e, 3e being joined to the longitudinal groove 1d and the concave position 1e, and then it is necessary to perform post-process, in which after the joining butts 2d, 3d and the tail portions 2e, 3e are inserted into the longitudinal groove 1d and the recess 1e, they are again positioned and fixed to each other.
  • Positioning is performed in which the top surfaces of the tail portions 2e, 3e, for example, are contacted with the upper wall surface of the longitudinal groove 1d.
  • the front ends of the blades 2, 3 are rocked by an undulation, formed on the bottom surface of the slider groove, becoming as a cam while moving in relative displacement to the needle body. This rocking might apply a large bending moment to the joining part 5 enough for joining components to be removed, so that it is necessary to strongly fix the components by providing the swaging positions 5a, 5b, 5c or the like.
  • the present invention is a compound needle for a flatbed knitting machine, being a combination of:
  • said opening and closing body of said slider consists of two blades, having said tongues separated on both sides of said hook and being capable of moving forward beyond the hook.
  • said concave part is formed as said lower joining part on a portion where said two blades are laid on each other; and said groove, provided at a lower end of said convex part as said upper joining part, sandwiches a portion below a lower part of the concave part in the portion where the two blades are laid on each other in said joining state.
  • joining between the lower joining part of the opening and closing body and the upper joining part of the base body is performed in such a way that, to the concave part provided on the one of the lower joining part or the upper joining part, the other of the lower joining part or the upper joining part is inserted.
  • the concave portion is provided with the narrowing part in which the width between the side walls is narrower than the width of the opening end, and the convex part is provided with the widening part having wider width than that of the narrowing part.
  • the concave part is elastically deformed midway through the insertion in the vertical direction, and the widening part is allowed to pass through the narrowing portion, so that it is possible to join the opening and closing body to the base body at the joining part.
  • the narrowing part prevents the widening part from passing through in the vertical direction, so that it is possible to fix the opening and closing body to the base body only by insertion.
  • the concave part and the convex part are joined to each other also in the widthwise direction in such a way that into the groove on one of the concave part or the convex part, the other of the concave part or the convex part is inserted, so that it is possible to prevent the opening and closing body and the base body from coming off from each other. Accordingly, it is possible to eliminate the necessity of post-process for strongly fixing the opening and closing body to the base body after forming the joining part.
  • the opening and closing body of the slider is formed of two blades, it is possible to join and fix the opening and closing body to the base body only by inserting.
  • the concave part is provided on the lower joining part of each of the two blades at the joining part of the base body of the slider to the two blades.
  • the lower part of the concave part, where the two blades are laid on each other, is sandwiched by the groove at the front end of the convex part of the upper joining part provided on the base body side, so that it is possible to prevent the blade from coming off from the joining part in the widthwise direction.
  • FIGS. 1 show a partial structure of a joining part 15 of a compound needle according to an example of the present invention.
  • Figs. 2 show a structure of a compound needle 17 provided with a joining part 15 shown in Figs. 1 .
  • overlapping explanations are sometimes omitted for matters explained on ahead with attaching the identical reference marks or matters corresponding to those explained in Figs. 3 with attaching the identical numerals except a different tens digit.
  • matters not described in the drawings are mentioned with the reference marks previously explained.
  • Fig. 1(a) shows a state in which a base body 11 is apart from a blade 13 as an opening and closing body.
  • An upper joining part 11c of the base body 11 has a convex part 11e projecting downward, the convex part 11e being provided with a groove 11d at a tip end.
  • An arm 11f is formed so as to extend beyond rear side of the upper joining part 11c.
  • the width of the convex part 11e in the longitudinal direction is the maximum at a widening part 11g.
  • the blade 13 has a lower joining part 13c that is joined to the upper joining part 11c.
  • the lower joining part 13c is provided with a concave part 13d opening upward.
  • the concave part 13d is provided with a narrowing part 13e in which the width between side walls extending downward from both sides of an opening end is narrower than the width at the opening end.
  • the front end of the blade 13 is laid on a different blade 12 for use, as similar to the blades 2, 3 shown in Figs. 3 .
  • a cross sectional structure, seen on a cutting surface line A-A, is shown on the right side of Fig. 1(a) .
  • the blade 12 is provided with a lower joining part 12c and a concave part 12d as similar to the blade 13.
  • Fig. 1(b) shows a state in which the base body 11 is joined to the blades 12, 13 to form a joining part 15.
  • a cross sectional structure of the joining part 15 seen on a cutting surface line B-B is shown on the right side.
  • the concave parts 12d, 13d are respectively provided with narrowing parts 12e, 13e having the width between the side walls narrower than the width of the opening end, and the convex part 11e is provided with the widening part 11g having wider width than that of the narrowing parts 12e, 13e.
  • the concave parts 12d, 13d are elastically deformed midway through the insertion in the vertical direction, and the widening part 11g is allowed to pass through the narrowing parts 12e, 13e.
  • the narrowing parts 12e, 13e prevent the widening part 11g from passing through in the vertical direction, so that it is possible to fix the opening and closing body to the base body 11 only by insertion.
  • the portion where the two blades 12, 13 are laid on each other is inserted into the groove 11d at the tip end of the convex part 11e, and the two blades 12, 13 are joined to each other, it is possible to prevent the two blades 12, 13 from coming off in the widthwise direction only by insertion in the vertical direction. Consequently, it is possible to eliminate the necessity of post-process for strongly fixing the opening and closing product to the base 11 after forming the joining part 15.
  • Figs. 2 show a structure of a compound needle 17 according to an example of the present invention and the base body 11, the blade 13, and the needle body 16, which are main components.
  • the base body 11 shown in Fig. 2(a) has the upper joining part 11c described in Figs. 1 and a longitudinal groove 11h at the front lower portion.
  • the longitudinal groove 11h is formed at a midpoint in the widthwise direction in a state to open downward.
  • the arm 11f is extended, and having a butt similar to the butt 1b shown in Fig. 3(a) projected thereon, which is omitted to be shown in the drawing.
  • the blade 13 shown in Fig. 2(b) has a tongue 13a and a curving portion 13b at the front portion as well as a sloping portion 13f.
  • the tongue 13a and the curving portion 13b are the same as the tongue 3a and the curving portion 3b shown in Fig. 3(c) , respectively.
  • the sloping portion 13f is provided for sinking the tongue 13a in clearing time. In clearing time, the needle body moves forward, the tongue 13a relatively moves back to open the hook of the needle body, and the tongue 13a receives a stitch retained in the hook. While this clearing time, it is necessary to sink the tongue 13a in the slider groove of the needle body in order that the tongue 13a does not become an obstacle to transfer a stitch. The same is applied to the blade 12, which is omitted to bet shown in the drawing.
  • the needle body 16 shown in Fig. 2(c) has a hook 16a at the front end, and a slider groove 16b is formed on a needle shank subsequent to the hook 16a.
  • a cam part 16c is provided on a bottom surface in a front side of the slider groove 16b.
  • the cam portion 16c causes the tongue 13a to float out of the slider groove 16b during closing the leading end of the hook 16a with the tongue 13a of the blade 13.
  • the tongue 13a moves back in the slider groove 16b, the sloping portion 13f is pressed by a pressing portion 16d provided on the needle body 16, and the tongue 13a is sunk in the slider groove 16b.
  • the compound needle 17 shown in Fig. 2(d) includes a slider 14, in which the base body 11 and the blade 13 form the joining part 15 and combined with each other, and the needle body 16.
  • the compound needle 17 is put in a needle groove arranged in line on a needle bed of a flatbed knitting machine and has the hook 16a at the front end for functioning as a knitting needle to move back and forth in the longitudinal direction along the needle groove.
  • the two blades 12, 13 form the opening and closing body to be combined with the base body 11, the blade 13 having the tongue 13a to open and close the hook 16a of the needle body 16, the blade 12 being the same as the blade 13, the opening and closing body may be formed of a single blade. Even though the number of blades is single or plural, the opening and closing body can be exchanged by removing the base body and the opening and closing body in such a case where the opening and closing body is damaged after forming the joining part 15.
  • the convex part 11e is formed on the upper joining part 11c of the base body 11, and the concave part 12d, 13d are formed on the lower joining parts 12c, 13c of the blades 12, 13, it is also possible to form convex parts on the blades 12, 13 and a concave part on the base body 11.
  • an opening and closing body is constructed with one piece, it is possible that a groove is provided on a base body on which a concave part is formed and a tip end of a convex part of the opening and closing body is inserted into the groove.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP11009236.8A 2010-11-22 2011-11-22 Compound needle for flatbed knitting machine Active EP2458051B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010260512A JP5766430B2 (ja) 2010-11-22 2010-11-22 横編機の複合針

Publications (3)

Publication Number Publication Date
EP2458051A2 EP2458051A2 (en) 2012-05-30
EP2458051A3 EP2458051A3 (en) 2014-05-21
EP2458051B1 true EP2458051B1 (en) 2015-09-30

Family

ID=45093271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11009236.8A Active EP2458051B1 (en) 2010-11-22 2011-11-22 Compound needle for flatbed knitting machine

Country Status (3)

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EP (1) EP2458051B1 (ja)
JP (1) JP5766430B2 (ja)
CN (1) CN102477662B (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6718856B2 (ja) * 2017-12-14 2020-07-08 株式会社島精機製作所 複合針

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6075654A (ja) * 1983-09-30 1985-04-30 株式会社島アイデア・センター 編機用複合針
DE4100931A1 (de) * 1991-01-15 1992-07-16 Groz & Soehne Theodor Schiebernadel, insbesondere fuer strickmaschinen
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
JP2001032154A (ja) * 1999-07-15 2001-02-06 Shima Seiki Mfg Ltd 編機用複合針
TW528822B (en) * 1999-10-27 2003-04-21 Shima Seiki Mfg Compound needle
FR2821093B1 (fr) * 2001-02-20 2003-05-09 Steiger S A C Atel Const Aiguille a coulisse pour machine a tricoter
KR100906752B1 (ko) * 2001-08-24 2009-07-09 가부시키가이샤 시마세이키 세이사쿠쇼 편기의 복합침
DE10164550A1 (de) * 2001-12-18 2003-07-10 Sipra Patent Beteiligung Nadel für Strick- oder Wirkmaschinen und damit ausgerüstete Strickmaschine
US7152437B2 (en) * 2002-12-20 2006-12-26 Shima Seiki Manufacturing, Ltd. Compound needle

Also Published As

Publication number Publication date
CN102477662A (zh) 2012-05-30
EP2458051A2 (en) 2012-05-30
JP5766430B2 (ja) 2015-08-19
JP2012112060A (ja) 2012-06-14
EP2458051A3 (en) 2014-05-21
CN102477662B (zh) 2015-04-01

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