EP0377403A2 - Zickzack-Nähmaschine - Google Patents

Zickzack-Nähmaschine Download PDF

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Publication number
EP0377403A2
EP0377403A2 EP89810867A EP89810867A EP0377403A2 EP 0377403 A2 EP0377403 A2 EP 0377403A2 EP 89810867 A EP89810867 A EP 89810867A EP 89810867 A EP89810867 A EP 89810867A EP 0377403 A2 EP0377403 A2 EP 0377403A2
Authority
EP
European Patent Office
Prior art keywords
needle bar
bearing
bearings
supports
seat
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.)
Granted
Application number
EP89810867A
Other languages
English (en)
French (fr)
Other versions
EP0377403B1 (de
EP0377403A3 (en
Inventor
Antonio Jimenez
Michel Combepine
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.)
Mefina SA
Original Assignee
Mefina SA
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 Mefina SA filed Critical Mefina SA
Publication of EP0377403A2 publication Critical patent/EP0377403A2/de
Publication of EP0377403A3 publication Critical patent/EP0377403A3/fr
Application granted granted Critical
Publication of EP0377403B1 publication Critical patent/EP0377403B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/02—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing with mechanisms for needle-bar movement

Definitions

  • a cradle generally in the form of a support pivoted about a generally vertical axis, that a mechanism makes tilt laterally in an alternating movement and which comprises two supports, for example two superimposed arms, with which are associated coaxial bearings intended to receive a needle bar mounted axially sliding inside them.
  • the axial, easy and precise sliding of the needle bar depends essentially a condition: the machining of the passages must be such that, at its end, the passages in question must occupy a rigorous aligned position.
  • the present invention precisely proposes a new design of a zig-zag sewing machine and various methods of mounting its components making it possible to obviate the cited drawbacks.
  • the cradle 1 has, traditionally, two superimposed arms 5 and 6, forming a support for a needle bar 7 which is slidably mounted in bearings 8 and 9 carried by the support 5 and by the support 6, respectively.
  • the axial drive of the needle bar 7 is carried out, in a traditional manner, from a rotary plate 10 controlled by a motor, not shown, and to which is attached a connecting rod, also not shown, carrying a pin 11 for the fixing the needle bar.
  • the bearings 8 and 9 are constituted, in substance, by a partially spherical body, preferably made of material with a low coefficient of friction, for example TEFLON, DELRIN (registered trademarks) or sintered metals, crossed by an axial passage in which the needle bar is able to slide freely.
  • a partially spherical body preferably made of material with a low coefficient of friction, for example TEFLON, DELRIN (registered trademarks) or sintered metals, crossed by an axial passage in which the needle bar is able to slide freely.
  • the bearings 8 and 9 are each engaged in a seat formed by the frustoconical wall of windows 5A and 6A formed in the arms 5 and 6, respectively, of the cradle.
  • each bearing 8 or 9 the seat which constitutes the wall of the windows 5A and 6A takes place practically between a particularly narrow annular segment of this face and a corresponding annular segment of the frustoconical wall of the respective window.
  • the width of these annular segments will be directly dependent on the inherent elasticity of the material of the bearing body and on the force exerted on the body in the direction of the corresponding seat.
  • the two bearings 8 and 9 of the machine shown are held in place by the thrust exerted on each of them thanks to an elastic blade 12 having the general shape of a U whose the free ends have lugs 12 A and 12 B by which the blade engages respectively on the body of the bearings 8 and 9.
  • This blade also has a pleat 12C in its intermediate part, pleats intended to improve the characteristics of elasticity of the blade.
  • the bearings 5 and 6 are automatically centered during assembly as soon as the needle bar has been threaded inside them, the whole taking its correct position relative to the cradle when the bearing body is engaged. in the respective seat of the supports 5 and 6 of the cradle and that the leaf spring exerts its thrust on the two bodies.
  • the assembly of the arrangement described can be carried out very simply, without any particular tool, by the implementation of one of the four processes below, for example: the two bearing bodies are placed at the ends of the leaf spring 12, as illustrated in the drawing, keeping the whole assembled in any suitable manner; the ends of the blade are then tightened towards each other until it is possible to engage the body of each bearing in the respective seat; the whole is released and then the needle bar is engaged, through the opening of one of the seats, in a first bearing, then between the supports of the cradle, finally, in the second bearing.
  • each bearing in the respective seat, then take an elastic blade 12 whose ends of the two arms are bent and engages the shells 12A and 12B on the body of the bearings 8 and 9 respectively.
  • the assembly of the assembly described starting by introducing one end of the needle bar into the space between the supports 5 and 6 of the cradle by passing this bar through one of the windows 5A or 6A, then threading on the bar successively the first and the second bearing, in inverted position from bearing to bearing. We then engage the end of this bar through the other window and place the bearings on their respective seats, then we engages the elastic blade between the bearings in the preloaded position and bears at its ends on one and on the other bearing, the strips provided at each end of the blade taking place on either side of the needle bar.
  • the sewing machine according to the invention may as well be a machine with mechanical control as a machine with electronic control, for example by microprocessor.
  • FIGS. 3 and 4 The one illustrated in FIGS. 3 and 4 is intended essentially to be controlled electronically, in particular by means of electrical pulses generated from computerized instructions.
  • the drawing shows in particular a stepping motor comprising a shaft 13 mounted on two ball bearings 14 and 15, between two flanges 16 and 17, and carrying the armature 18 of the motor as well as, at its lower end, a pinion 19.
  • the inductor 20 is represented, on the left of the shaft 18, by its stack of stator sheets and, on the right, by one of its windings.
  • the flange 16 extends to the right, beyond the inductor 20 to form a lug 16a having an opening 16b of frustoconical profile, tapering towards the top of the figure and which forms a seat for the external face, spherical, of a bearing 21 held in this opening by a vertical spring 22 engaged, by the upper end, on a neck 21a projecting from the lower part of the bearing 21 and, by its lower end, on a neck 23a which has the upper part of a second bearing 23, identical to the bearing 21 and resting on a seat formed by an opening 24a, of frustoconical profile, formed in a horizontal lever 24.
  • This profile is narrowed towards the bottom of the figure.
  • the lever 24 is in the general form of a circle sector, toothed at 24b, in engagement with the pinion 19 and resting on the upper face of a complementary flange 26, on the one hand, by two semi-spherical projections 24c and 24d, and, on the other hand, by a ball 25, engaged both in a semi-spherical housing 24e of the lever only in a semi-spherical housing 26a of the flange 26.
  • a slot 24f extending near the toothing 24b, guarantees elastic contact without play and damping, between the pinion 19 and the toothing itself (FIGS. 3 and 4).
  • the flange 26 is fixed to a flange 17e of the flange 17, of which only a portion is visible in the drawing but which also extends along the longitudinal edges of the latter, up to its straight end. This fixing is achieved by screws, not shown, passing through passages 26b and engaging in corresponding threaded holes formed in the flange.
  • the flange 26 and the flange 17 could very well be constituted by elements of a single piece.
  • a window 26c of arcuate shape, allows the vertical passage and the lateral movement of a needle bar 27 slidably mounted in the bearings 21 and 23.
  • the ball 25 constitutes a pivot axis for the lever 24 which can therefore be tilted clockwise and counterclockwise by corresponding angular displacement of the armature 18 of the stepping motor, each time in one direction contrary to that of lever 24 tilting.
  • the needle bar in a pendulum movement around the upper pivot point which constitutes the bearing 21 and thus to obtain the throwing of the needle 28 carried by the needle bar 27.
  • the pendulum movement in question will be of amplitude programmed by sending to the stepping motor voltage pulses, in number and polarity depending on the type of stitches to be sewn.
  • FIG. 6 As regards the axial drive of the needle bar 27, by sliding in the bearings 21 and 23, this is controlled by the mechanism illustrated diagrammatically in FIG. 6 in which 29 represents a driven shaft, at its right end, by a motor not shown; 30 is a plate integral with this shaft to which is fixed, in an eccentric position, a pivot axis 31 for a bearing 32, the external face of which, with a spherical profile, is mounted in a seat of complementary shape, formed at the lower end , in the drawing, of a link 33.
  • this link has a seat, with a spherical profile, in which a bearing 34 is mounted, the external face of which has a profile complementary to that of this seat and which is pivotally mounted on an axis 35.
  • a spring 36 is stretched between a plate 37, integral with the axis 35, and a bearing 34, this spring being intended to compensate for the play that may exist between this bearing and the axis 35.
  • This axis is integral with the upper end of the needle bar 27 to which it transmits the axial movement of which it is the object during the rotation of the plate 30.
  • this lever is ensured to be permanently maintained in the correct position on the flange 26, by support of the projections. 24c and 24d on this flange, on the one hand, and by engagement of the ball 25 both in the housing 26a of the flange and in the housing 24e of the lever 24, on the other hand, without involving other organs of maintenance.
  • the assembly described consists of a reduced number of parts, capable of being mounted in particular in any of the ways described above with reference to the embodiment of the figures. 1 and 2.
  • the spring 22 is allowed to relax so that the bearings engage in the above seats.
  • the needle bar 27 is introduced into the opening of the first bearing (21 or 23), then through the spring 22 and, finally, into the opening of the second bearing, by axial sliding of the bar in the bearings.
  • the spring 22 of the embodiment of FIG. 3 could very well be replaced by an elastic pre-stressed blade of the kind used in the embodiment of FIGS. 1 and 2 and having for example the shape of a V, in support, by the end of its arms on the bearings 21 and 23 respectively.
  • FIG. 5 The structure of the variant of FIG. 5 is not distinguished from the embodiment described with reference to FIGS. 3 and 4 by the fact that it is the upper bearing which is movable transversely while the lower bearing remains stationary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP89810867A 1988-11-30 1989-11-13 Zickzack-Nähmaschine Expired - Lifetime EP0377403B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4439/88 1988-11-30
CH4439/88A CH676999A5 (de) 1988-11-30 1988-11-30

Publications (3)

Publication Number Publication Date
EP0377403A2 true EP0377403A2 (de) 1990-07-11
EP0377403A3 EP0377403A3 (en) 1990-08-22
EP0377403B1 EP0377403B1 (de) 1993-07-28

Family

ID=4276150

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89810867A Expired - Lifetime EP0377403B1 (de) 1988-11-30 1989-11-13 Zickzack-Nähmaschine
EP89810868A Expired - Lifetime EP0377404B1 (de) 1988-11-30 1989-11-13 Zickzack-Nähmaschine

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP89810868A Expired - Lifetime EP0377404B1 (de) 1988-11-30 1989-11-13 Zickzack-Nähmaschine

Country Status (15)

Country Link
US (2) US5063865A (de)
EP (2) EP0377403B1 (de)
JP (2) JPH02182284A (de)
KR (2) KR900008093A (de)
CN (2) CN1025538C (de)
AU (2) AU621422B2 (de)
BR (2) BR8906043A (de)
CA (2) CA2003958A1 (de)
CH (1) CH676999A5 (de)
DD (2) DD289302A5 (de)
DE (2) DE68907884T2 (de)
ES (2) ES2043096T3 (de)
PT (2) PT92429B (de)
RU (1) RU2050425C1 (de)
ZA (2) ZA899035B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205230A (en) * 1990-11-29 1993-04-27 Mefina S.A. Sewing machine

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5365298A (en) * 1993-04-05 1994-11-15 Eastman Kodak Company Camera shutter with oscillation damping
JP2001340675A (ja) * 2000-05-31 2001-12-11 Aisin Seiki Co Ltd オーバーロックミシン
KR20010007724A (ko) * 2000-07-04 2001-02-05 임준기 마취효과와 살균력을 가진 밴드
JP2003117271A (ja) * 2001-10-17 2003-04-22 Yamato Sewing Mach Co Ltd ミシン
RU2215838C1 (ru) * 2002-06-11 2003-11-10 Общество с ограниченной ответственностью "Завод бытовых швейных машин" Швейная машина зигзаг
RU2215840C1 (ru) * 2002-07-17 2003-11-10 Общество с ограниченной ответственностью "Завод бытовых швейных машин" Блок-модуль фронтальных механизмов швейной машины
JP4913373B2 (ja) * 2005-01-07 2012-04-11 Ｊｕｋｉ株式会社 ミシンの針駆動機構
JP2009061031A (ja) * 2007-09-05 2009-03-26 Juki Corp ボタン穴かがりミシン
JP2010094272A (ja) * 2008-10-16 2010-04-30 Juki Corp サージングミシン
CN101942745B (zh) * 2010-07-27 2013-04-24 际华三五三四制衣有限公司 一种由平缝机改装的临缝机
CN203051709U (zh) * 2012-11-09 2013-07-10 台州拓卡奔马机电科技有限公司 一种套结机上的下轴齿密封机构
US9657418B2 (en) * 2013-03-14 2017-05-23 Windham Sewing Machines, Llc Sewing machine
CN105970491B (zh) * 2016-05-19 2018-12-18 台山山度士制衣厂有限公司 旋轴式高厚材料缝纫装置
CN111364181B (zh) * 2020-04-10 2023-08-29 诸暨轻工时代机器人科技有限公司 毛巾线圈的挑动机构和单电机梭式毛巾装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2253110A (en) * 1937-11-19 1941-08-19 Jr Edward S Cornell Self-compensating bearing
FR881686A (fr) * 1941-05-03 1943-05-05 Int Button Hole Sewing Machine Machine à coudre
US2862468A (en) * 1954-11-29 1958-12-02 Singer Mfg Co Ornamental stitch sewing machines

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE596356C (de) * 1933-02-28 1934-05-04 Carl J Lehmann Fa Naehmaschine, insbesondere zum Einnaehen von Hutleder in Schirmmuetzen
NL106140C (de) * 1954-11-29
US3026831A (en) * 1957-12-02 1962-03-27 Singer Mfg Co Zigzag mechanisms for sewing machines
US2932268A (en) * 1958-06-24 1960-04-12 Singer Mfg Co Needle bar drives for zigzag sewing machines
US3518954A (en) * 1968-06-21 1970-07-07 Singer Co Round end buttonhole mechanism for zigzag sewing machines
FR2198500A5 (en) * 1972-09-05 1974-03-29 Arvai T Sewing machine zig-zag stitch device - producing stitches of increased amplitude
US3782311A (en) * 1972-12-29 1974-01-01 Singer Co Simplified basting stitch mechanism
US4000706A (en) * 1976-05-06 1977-01-04 The Singer Company Skip stitch mechanism for sewing machines
MC1176A1 (fr) * 1977-02-02 1978-09-25 T Arvai Perfectionnements au montage de l'aiguille dans une machine a coudre
US4215638A (en) * 1978-06-12 1980-08-05 The Singer Company Needle bar suspension means for a zig-zag sewing machine
US4213409A (en) * 1978-10-05 1980-07-22 The Singer Company Needle bar support
US4458611A (en) * 1980-11-10 1984-07-10 White Consolidated Industries, Inc. Needle bar guide for a zig zag sewing machine
ES8701259A1 (es) * 1986-02-03 1986-11-16 Coser Alfa Maquinas Maquina de coser perfeccionada
JPH0756338B2 (ja) * 1987-10-16 1995-06-14 本田技研工業株式会社 車輌用無段変速機の制御方法
JP2578444B2 (ja) * 1987-10-16 1997-02-05 日産自動車株式会社 自動車用シートスライド装置
US4873932A (en) * 1989-02-01 1989-10-17 Ssmc Inc. Stepper driven stitch patterning mechanism for sewing machines using spiral cam groove and follower
US4895090A (en) * 1989-02-10 1990-01-23 Ssmc Inc. Lost motion compensation for sewing machine needle vibrating gate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2253110A (en) * 1937-11-19 1941-08-19 Jr Edward S Cornell Self-compensating bearing
FR881686A (fr) * 1941-05-03 1943-05-05 Int Button Hole Sewing Machine Machine à coudre
US2862468A (en) * 1954-11-29 1958-12-02 Singer Mfg Co Ornamental stitch sewing machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205230A (en) * 1990-11-29 1993-04-27 Mefina S.A. Sewing machine

Also Published As

Publication number Publication date
US5099776A (en) 1992-03-31
EP0377404B1 (de) 1993-05-26
EP0377404A2 (de) 1990-07-11
EP0377403B1 (de) 1993-07-28
CN1025538C (zh) 1994-07-27
ZA899035B (en) 1990-09-26
RU2050425C1 (ru) 1995-12-20
DD289301A5 (de) 1991-04-25
KR910009993A (ko) 1991-06-28
DE68906774T2 (de) 1994-01-05
CH676999A5 (de) 1991-03-28
DE68906774D1 (de) 1993-07-01
ES2044212T3 (es) 1994-01-01
EP0377403A3 (en) 1990-08-22
DE68907884D1 (de) 1993-09-02
KR900008093A (ko) 1990-06-02
JPH02182284A (ja) 1990-07-16
PT92430B (pt) 1995-09-12
CN1043172A (zh) 1990-06-20
BR8906042A (pt) 1990-06-19
ES2043096T3 (es) 1993-12-16
CA2003958A1 (fr) 1990-05-31
PT92429A (pt) 1990-05-31
BR8906043A (pt) 1990-06-19
CN1025537C (zh) 1994-07-27
US5063865A (en) 1991-11-12
PT92430A (pt) 1990-05-31
ZA899171B (en) 1990-09-26
AU621422B2 (en) 1992-03-12
EP0377404A3 (en) 1990-08-29
AU4570389A (en) 1990-06-07
AU621421B2 (en) 1992-03-12
JPH02182285A (ja) 1990-07-16
DE68907884T2 (de) 1994-03-10
PT92429B (pt) 1995-08-09
CN1043169A (zh) 1990-06-20
DD289302A5 (de) 1991-04-25
AU4570289A (en) 1990-06-07
CA2003959A1 (fr) 1990-05-31

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