EP2305866B1 - Weft knitting machine equipped with movable sinker - Google Patents

Weft knitting machine equipped with movable sinker Download PDF

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Publication number
EP2305866B1
EP2305866B1 EP09762256.7A EP09762256A EP2305866B1 EP 2305866 B1 EP2305866 B1 EP 2305866B1 EP 09762256 A EP09762256 A EP 09762256A EP 2305866 B1 EP2305866 B1 EP 2305866B1
Authority
EP
European Patent Office
Prior art keywords
sinker
needle bed
bed gap
needle
receiving portion
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
EP09762256.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2305866A1 (en
EP2305866A4 (en
Inventor
Takuya Miyai
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 EP2305866A1 publication Critical patent/EP2305866A1/en
Publication of EP2305866A4 publication Critical patent/EP2305866A4/en
Application granted granted Critical
Publication of EP2305866B1 publication Critical patent/EP2305866B1/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
    • D04B15/06—Sinkers
    • 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
    • D04B15/10—Needle beds
    • 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
    • D04B15/88—Take-up or draw-off devices for knitting products
    • D04B15/90—Take-up or draw-off devices for knitting products for flat-bed knitting machines

Definitions

  • the present invention relates to a flatbed knitting machine provided with movable sinkers capable of pressing down a knitted fabric.
  • a flatbed knitting machine 1 provided with movable sinkers whose schematic construction is shown in Fig. 5 is used (See Patent Citation 1, for example).
  • needle beds 3 are arranged in front and back to face each other and define a needle bed gap 2 between them.
  • Each of the needle beds 3 is slanted so that it becomes high in level at a portion thereof closer to the needle bed gap 2 and decreases in level with distance from the needle bed gap 2.
  • Patent citation 1 and its family member EP1655398 is considered to represent the closest prior art with respect to the present invention.
  • the needle bed 3 is formed with needle plates 5 standing upright and spaced at a regular pitch on a strip base 4 extending in a direction perpendicular to the paper surface.
  • a needle groove 6 is formed between adjacent needle plates 5.
  • a wire 7 is extended through between the base 4 and the needle plate 5, for positioning them.
  • a knitting needle 8 is accommodated in the needle groove 6.
  • the knitting needle 8 in the needle groove 6 is capable of sliding shift in a lateral direction, when viewed in the drawing, so as to advance and retract the hook at the front end of the knitting needle 8 into and from the needle bed gap 2.
  • a movable sinker 10 is placed between the adjacent knitting needles 8 and at one lateral side of the needle plate 5 so as to be juxtaposed thereto.
  • the movable sinker 10 includes a sinker 11 which is shifted to oscillate between an opened state shown in Fig. 5(a) and a closed state shown in Fig. 5(b) .
  • the switching between the opened state and the closed state of the sinker 11 is controlled by a sinker jack 12.
  • the sinker 11 has a working arm 11b in its part extending from a support receiving portion 11a toward the needle bed gap 2.
  • the working arm 11b has a loop forming portion 11c and a yarn receiving portion 11d.
  • a passive arm 11e is also extended from the support receiving portion 11a.
  • a wire spring 13 is accommodated in the interior of the journal portion 11a of the sinker 11.
  • the support receiving portion 11a of the sinker 11 has an outer periphery shaped like a circular arc and is so supported as to be shifted to oscillate via a sinker supporting portion 5a of the needle plate 5.
  • the support receiving portion 11a of the sinker 11 and the wire spring 13 are accommodated in a sinker accommodating portion 5b which is formed by reducing a thickness of the needle plate 5 on a side thereof near to the needle bed gap 2.
  • the wire spring 13 is shifted in such a manner as to be pivoted about the support receiving portion 11a of the sinker 11, whereby a resilient torque is produced to urge the working arm 11b in the direction of advancing to the needle bed gap 2.
  • the sinker jack 12 has a front end portion 12a on the side near to the needle bed gap 2 and has a base portion 12b on the side away from the needle bed gap 2.
  • the base portion 12b is provided with a butt 12c which is driven by a cam mechanism mounted on a carriage which is moved along the needle bed 3 in a direction perpendicular to the paper surface.
  • the base portion 12b is provided, at an intermediate portion thereof, with a split portion 12d extending in a lateral direction when viewed in the drawing.
  • a metal band 15 extending in a direction perpendicular to paper surface is inserted through the split portion 12d.
  • the metal band 15 is extended through a metal band through-hole 5c of the needle plate 5 as well so that when the sinker jack 12 is shifted in the sliding manner, drop of the sinker jack 12 from the needle groove 6 can be restricted.
  • a joint of the sinker jack 12 and the sinker 11 is performed in such a manner that a front end of the passive arm 11e of the sinker 11 is engaged with an engagement portion 12e formed in the vicinity of the front end portion 12a of the sinker jack 12.
  • the engagement portion 12e of the sinker jack 12 has a dimension still larger than that of the front end of the passive arm 11e of the sinker 11, so that the front end of the passive arm 11e is loosely fitted in the engagement portion 12e.
  • the wire spring 13 is supported at one end by a basal end of the working arm 11b of the sinker 11 and at the other end by a spring stopper 5d arranged in the vicinity of the front end of the needle plate 5.
  • the resilient force of the wire spring 13 becomes large in the opened state and becomes small in the closed state.
  • a large resilient force of the wire spring 13 acts so that the engagement portion 12e of the sinker jack 12 is pulled in the direction to the needle bed gap 2 through the passive arm 11e of the sinker 11.
  • the sinker jack 12 is provided with a lug 12f.
  • the lug 12f can be retained by a wire 16 extending through the wire through-hole 5e of the needle plate 5.
  • Figs. 6 and 7 show a sectional side view and a side view showing respectively a construction of the base 4 and a construction of the needle plate 5 combined to form the needle bed 3 of Fig. 5 .
  • the base 4 has a needle plate insertion groove 4a to insert the needle plate 5 and has a surface as a bottom surface 4b of the needle groove 4a.
  • the base 4 has, at a front end thereof, a sinker groove 4c for receiving the working arm 11b of the sinker 11.
  • Fig. 8 shows a side view for a construction of a combined state of the sinker 11 and the wire spring 13 of Fig. 5 .
  • a roundabout portion 13a of the wire spring 13 is accommodated in the interior of the support receiving portion 11a of the sinker 11.
  • An urging portion 13b formed by one end of the wire spring 13 exerts a torque on a portion of the support receiving portion 11a from which the wording arm 11b is extended.
  • a support portion 13c of the wire spring 13 is a free end.
  • a corresponding portion to the urging portion 13b of the wire spring 13 may be formed by being extended from the sinker 11 and the corresponding portion to the sinker 11 and a corresponding portion to the wire spring 13 may be formed integrally (See Patent Citation 2, for example). It is to be noted however that in the corresponding member to the sinker 11 of Patent Citation 2, the corresponding portion to the working arm 11e is formed by being extended laterally and is driven vertically by a presser provided on the carriage.
  • Fig. 9 shows a side view for a construction of the sinker jack 12 of Fig. 5 .
  • the engagement portion 12e of the sinker jack 12 is shifted in the lateral direction as viewed in the drawing by a driving force exerted on the butt 12c.
  • Fig. 10 shows a schematic construction of a drive mechanism used in the flatbed knitting machine 1 of Fig. 5 .
  • the knitting needle 8 of Fig. 5 is driven by a needle actuating cam mechanism 20.
  • the needle actuating cam mechanism 20 is mounted on a carriage 21 which moves in reciprocation to a direction perpendicular to paper surface of Fig. 5 along the needle bed 3.
  • a solenoid 22 is arranged on at least one side with respect to the moving direction of the carriage 21.
  • the carriage 21 is provided with a needle selection mechanism 23 for selectively driving the knitting needle 8 by the needle actuating cam mechanism 20.
  • the needle actuating cam mechanism 20 guides a butt of the knitting needle 8 with a cam including a center cam 25, a stitch cam 26, and a bridge cam 27 so as to trace e.g. a guide trajectory 28a in accordance with the moving direction of the carriage 21.
  • An illustrated guide trajectory 20a is traced when a knit knitting motion is impaired to the knitting needle 8.
  • the guiding path 20a can be switched by the cam mechanism 20 so that a variety of knitting motions can be impaired to the knitting needle 8 in accordance to multiple needle selection modes by the needle selection mechanism 23.
  • a slider cam 28 for the slider is used to guide the butt of the slider so as to trace the guide trajectory 28a.
  • the switching between the opened state and the closed state of the movable sinker 10 of Fig. 5 is driven by a sinker actuating cam mechanism 30.
  • the sinker actuating cam mechanism 30 includes a moving cam 31, oscillating cams 32, 33, and a rest cam 34 and guides the butt 12c of the sinker jack 12 so that a guiding trajectory 30a can be traced.
  • the moving cam 31 is moved downstream with respect to the moving direction of the carriage 21 by a reaction force produced when the butt 12c is driven.
  • the sinker 11 is driven in the open direction by the moving cam 31 so that the working arm 11b can be retreated from the needle bed gap 2 to prevent from trouble on feeding of the knitting yarn.
  • the oscillating cams 32, 33 are so associated that only a portion of the carriage 21 on the upstream side with respect to the moving direction of the carriage 21 can be actuated.
  • the oscillating cam 32 draws the sinker jack 12 to retreat the working arm 11b of the sinker 11 from the needle bed gap 2 before the butt of the knitting needle 8 is so guided as to be advanced into the needle bed gap 2 by the center cam 25.
  • the sinker 11 is retreated from the needle bed gap 2
  • a distance between the urging portion 13b and the support portion 13c of the wire spring 13 is narrowed and a resilient force of the wire spring is increased.
  • the oscillating cam 32 stops the drawing of the sinker jack 12, so that, as a result, the working arm 11b is urged by the increased resilient force and is advanced into the needle bed gap 2 again to press down the knitting yarn reliably by the yarn receiving portion 11d.
  • the rest cam 34 is actuated by the solenoid 22 to retreat the sinker jack 12.
  • the torque of the wire spring 13 to urge the working arm 11b of the sinker 11 in the direction of the needle bed gap 2 increases to a maximum value in the opened state and decreases to a minimum value in the closed state.
  • the force to press down the knitted fabric in the needle bed gap 2 by the yarn receiving portion 11d decreases to a minimum value in the closed state.
  • the flatbed knitting machine 1 can allow a larger stitch loop to be formed by a half-gauge knitting and the like.
  • the stitch loop increases in size, the working arm 11b advanced to the needle bed gap 2 in the closed state of the sinker 11 increases in advancing stroke and, as a result, it becomes difficult to generate a proper torque from the wire spring 13.
  • a sufficient pressing force is tried to be produced in the closed state in which the advancing stroke of the sinker 11 is increased, there is a possibility that the torque may increase excessively in the opened state so that the wire spring 13 may be broken.
  • the present invention provides a flatbed knitting machine having movable sinkers, in which a number of sinkers are arranged in a oscillating capable manner on a front end side of a needle bed confronting a needle bed gap which is an area where a knitted fabric is knitted, each sinker having a working arm extending to a direction of the needle bed gap in the shape of a curve from a support receiving portion, which has an outer periphery shaped like a circular arc and is so supported as to be shifted to oscillate, and a passive arm provided on the side of the support receiving portion away from the needle bed gap, and the sinker can be switched between its closed state in which a knitted fabric in a needle bed gap is pressed down by a yarn receiving portion provided at a location on the side closer to a front end of the working arm and its opened state in which the yarn receiving portion is away from the needle bed gap by shifting a front end portion of a sinker driving member that acts on the passive arm loosely fitted each other in a direction closer to the needle bed
  • the torque spring is connected to the sinker at a portion thereof to be supported by the working arm, so as to be integrated with the sinker.
  • the torque spring is connected to the sinker driving member at a portion thereof to be supported by the front end portion, so as to be integrated with the sinker driving member.
  • each sinker is provided with a support receiving portion which has an outer periphery shaped like a circular arc and is so supported as to be shifted to oscillate, a working arm in the shape of a curve extended to a needle bed gap from the support receiving portion, and a passive arm provided on the side of the support receiving portion away from the needle bed gap.
  • the torque spring is accommodated in inside the support receiving portion.
  • T he sinker driving member which is shifted to allow the sinker to switch between the closed state and the opened state, supports by its front end portion, which acts the passive arm of the sinker in a loosely fitted state, the other end of the torque spring whose one end is supported by the working arm of the sinker.
  • the torque spring In the closed state of the sinker in which the front end portion of the sinker driving member comes closer to the needle bed gap, the torque spring can be pressed in a direction for the working arm of the sinker to be advanced into the needle bed gap.
  • the torque spring thrusts the front end portion of the sinker driving member from the front side and from the back side in a sandwichin manner, so that even when the sinker increases in stroke from its opened state to its closed state, a pressing force exerted by the yarn receiving portion of the working arm in the closed state can be reinforced by a thrust force exerted on the torque spring pressed by the sinker driving member, to obtain a sufficient pressing force.
  • the sinker and the torque spring may be integrated so that the movable sinker can be decreased in number of components to facilitate the assembly.
  • the sinker driving member and the torque spring may be integrated so that the movable sinker can be decreased in number of components to facilitate the assembly.
  • Needle bed gap 6 Needle groove 8 Knitting needle 43 Needle bed 45 Needle plate 50 Movable sinker 51 Sinker 52 Sinker jack 53 Wire spring
  • FIGs. 1-4 show constructions related to an embodiment of the present invention.
  • Fig. 1 shows a schematic construction of a flatbed knitting machine 41 of an embodiment of the present invention.
  • Figs. 1(a) and 1(b) show the opened state and the closed state respectively presented as sectioned side views in the same manner as in Fig. 5 .
  • a needle bed 43 is formed with needle plates 45 juxtaposed on a base 4.
  • a movable sinker 50 includes a sinker 51, a sinker jack 52 and a wire spring 53.
  • the needle plate 45 has a sinker support portion 45a and a sinker accommodating portion 45b corresponding to the sinker support portion 5a and the sinker accommodating portion 5b of the needle plate 5 of Fig.
  • the wire spring 53 is not supported by the needle plate 45 at a corresponding part thereof to the spring stopper 5d, but is supported in abutment with a front end portion 52a of the sinker jack 52.
  • the wire spring 53 is supported at one end thereof by a base end portion of the working arm 51b of the sinker 51 and is supported at the other end by a front end portion 52a of the sinker jack 52 which is a sinker driving member.
  • the other end of the wire spring 53 whose one end is supported by a front end portion of the working arm 51b of the sinker 51, thrusts the front end portion 52a of the sinker jack 52 from the front side closer to the needle bed gap 2 by the reaction force of the wire spring supported and also thrusts the front end portion 52a from the back side as well through the passive arm 51e of the sinker 51 in a sandwiching manner.
  • the knitted fabric in the needle bed gap 2 can be pressed down by a pressing force nearly equal to that in the opened state.
  • the sinker 51 is basically the same as the sinker 11 of Fig. 5 and has a support receiving portion 51a, a working arm 51b, a loop forming portion 51c, a yarn receiving portion 51d, and a passive arm 51e.
  • a curved portion 52b, a butt 52c, and an engagement portion 52e of a sinker jack 52 of Fig, 1 correspond to the base portion 12b, the butt 12c, and the engagement portion 12e of the sinker jack 12 shown in Fig. 5 , respectively.
  • it is a flat upper surface 52d of the curved portion 52b that is equivalent to the split portion 12d through which the metal band 15 extends.
  • the sinker jack 52 does not have any specific structure to be retained by the wire 16 which is equivalent to the lug 12f of the sinker jack 12, but is simply provided with a tail portion 52f which contacts with side walls of the needle groove 6 to provide an increased sliding resistance, so as to be simplified in structure.
  • Fig. 2 shows a construction of the sinker jack 52 of Fig. 1 .
  • Fig. 2(a) and Fig. 2(b) show the construction presented as a side view and the construction presented as a bottom view, respectively.
  • the sinker jack 52 is provided with the tail portion 52f and thereby is simplified in structure in the neighborhood of the lug 12f of the sinker jack 12 shown in Fig. 9 . Since the wire spring 53 is not flexed so much even in the opened state of the sinker 51, its reaction force is not increased excessively. Accordingly, even the same level of a resistance that offers to the sliding movement of the tail portion 52f along the needle groove 6 is enough to maintain the opened state, without providing the lug. Therefore, the wire 16 of Fig.
  • Fig. 1 In relation to the metal band 15, the construction equivalent to the split portion 12d of the sinker jack 12 is omitted by simply imposing restriction on the curved portion 52b of the sinker jack 52 by the upper surface 52d of the sinker jack 52.
  • the sinker jack 12 may be cannibalized.
  • Fig. 3 shows a side view showing a construction of the sinker 51 combined with the wire spring 53 of Fig. 1 .
  • a roundabout portion 53a and an urging portion 53b correspond to the roundabout portion 13a and the urging portion 13b of wire spring 13 of Fig. 8 , respectively.
  • a support portion 53c of the wire spring 53, or a free end of the same is smaller in bend than the support portion 13c of the wire spring 13 and extends upwards along the passive arm 51e.
  • the support portion 53c is moved leftwards together with the front end 52a of the sinker jack 52 of Fig. 2 . Therefore, even when the sinker 51 is opened and the urging portion 53b is moved leftwards, since the wire spring 53 is not bent too much, no excessive resilient force is generated.
  • Fig. 4 shows a side view showing a construction of the needle plate 45 of Fig. 1 .
  • the needle plate 45 has basically the same construction as that of the needle plate 5 shown in Fig. 7 , including a sinker supporting portion 45a, a sinker accommodating portion 45b, and a metal band through-hole 45c, except that it does not include the spring stopper 5a and the wire through-hole 5e.
  • the spring force to urge the working arm 51b to advance to the needle bed gap 2 can be reduced in the opened state (a) in which the urging force of the spring exerted on the working arm 51b of the sinker 51 is not normally needed.
  • the rested state of the sinker jack 52 can be maintained by the same level of resistance that offers to the sliding movement of the bending portion 52f along the needle groove 6.
  • the support portion 53c of the wire spring 53 receives a urging force from the front end portion 52a of the sinker jack 52, so that the sinker 51 can be pressed down by the urging portion 53b to adequately press down the knitted fabric in the needle bed gap 2. Since the pressing force can be increased by simply advancing the sinker jack 52 in the direction of the needle bed gap 2, the cam mechanism for driving the sinker jack 52 does not require any specific arrangements like the oscillating cams 32, 33 included in the sinker actuating cam mechanism 30 of Fig. 10 , thus providing a simplified structure.
  • the wire spring 53 may be varied in shape, as long as it can generate a torque for allowing the sinker 51 to be shifted to oscillate.
  • the torque spring is varied in shape from the wire spring 53 so that it can be adapted to integration with the sinker.
  • the torque spring may be adapted not only to the integration with the sinker but also to the integration with the sinker driving member such as the sinker jack. Such integration can provide a reduced number of components of the movable sinker and thus can provide a reduced number of assembly processes.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP09762256.7A 2008-06-13 2009-06-09 Weft knitting machine equipped with movable sinker Not-in-force EP2305866B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008155673 2008-06-13
PCT/JP2009/002598 WO2009150825A1 (ja) 2008-06-13 2009-06-09 可動シンカーを備える横編機

Publications (3)

Publication Number Publication Date
EP2305866A1 EP2305866A1 (en) 2011-04-06
EP2305866A4 EP2305866A4 (en) 2012-12-26
EP2305866B1 true EP2305866B1 (en) 2015-09-30

Family

ID=41416538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09762256.7A Not-in-force EP2305866B1 (en) 2008-06-13 2009-06-09 Weft knitting machine equipped with movable sinker

Country Status (4)

Country Link
EP (1) EP2305866B1 (ja)
JP (1) JP5414670B2 (ja)
CN (1) CN102046867B (ja)
WO (1) WO2009150825A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101569012B1 (ko) 2013-03-08 2015-11-13 가부시키가이샤 시마세이키 세이사쿠쇼 가동싱커를 구비하는 횡편기
KR101648378B1 (ko) 2014-01-10 2016-08-16 가부시키가이샤 시마세이키 세이사쿠쇼 싱커장치를 구비한 횡편기

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6161375B2 (ja) * 2013-04-08 2017-07-12 株式会社島精機製作所 可動シンカーを備える横編機
JP6275101B2 (ja) * 2015-11-06 2018-02-07 株式会社島精機製作所 横編機
CN107904768B (zh) * 2017-12-29 2024-02-09 东莞市津马精密五金有限公司 一种弹性沉降片

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Publication number Priority date Publication date Assignee Title
JPH03504991A (ja) * 1988-06-13 1991-10-31 ウニヴエルザル　マシーネンフアブリーク　ドクトル　ルドルフ　シーベル　ゲーエムベーハー　ウント　コムパニー　カーゲー 平床編機
JP2700204B2 (ja) * 1992-12-15 1998-01-19 株式会社島精機製作所 横編機におけるシンカー装置
JP3504991B2 (ja) * 1995-02-13 2004-03-08 積水化学工業株式会社 難燃性熱可塑性樹脂組成物
DE19725073B4 (de) * 1997-06-13 2004-11-25 H. Stoll Gmbh & Co. Strickmaschine, insbesondere Flachstrickmaschine
TW522186B (en) * 1999-11-17 2003-03-01 Shima Seiki Mfg Sinker device of flat knitting machine
JP4015972B2 (ja) * 2003-07-30 2007-11-28 株式会社島精機製作所 横編機のシンカー装置
DE602004032351D1 (de) * 2003-07-30 2011-06-01 Shima Seiki Mfg Kulierstrick- oder kulierwirkmaschine mit bewegbarer platine
JP5161089B2 (ja) * 2006-08-11 2013-03-13 株式会社島精機製作所 可動シンカおよび横編機

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101569012B1 (ko) 2013-03-08 2015-11-13 가부시키가이샤 시마세이키 세이사쿠쇼 가동싱커를 구비하는 횡편기
KR101648378B1 (ko) 2014-01-10 2016-08-16 가부시키가이샤 시마세이키 세이사쿠쇼 싱커장치를 구비한 횡편기

Also Published As

Publication number Publication date
CN102046867A (zh) 2011-05-04
WO2009150825A1 (ja) 2009-12-17
JPWO2009150825A1 (ja) 2011-11-10
EP2305866A1 (en) 2011-04-06
EP2305866A4 (en) 2012-12-26
JP5414670B2 (ja) 2014-02-12
CN102046867B (zh) 2012-08-22

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