EP2182102B1 - Machine à coudre - Google Patents

Machine à coudre Download PDF

Info

Publication number
EP2182102B1
EP2182102B1 EP09012000A EP09012000A EP2182102B1 EP 2182102 B1 EP2182102 B1 EP 2182102B1 EP 09012000 A EP09012000 A EP 09012000A EP 09012000 A EP09012000 A EP 09012000A EP 2182102 B1 EP2182102 B1 EP 2182102B1
Authority
EP
European Patent Office
Prior art keywords
needle bar
arm
needle
arm shaft
shaft
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
EP09012000A
Other languages
German (de)
English (en)
Other versions
EP2182102A1 (fr
Inventor
Artur Hinkelmann
Christoph Heckner
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.)
Duerkopp Adler AG
Original Assignee
Duerkopp Adler AG
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 Duerkopp Adler AG filed Critical Duerkopp Adler AG
Publication of EP2182102A1 publication Critical patent/EP2182102A1/fr
Application granted granted Critical
Publication of EP2182102B1 publication Critical patent/EP2182102B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/10—Electrical or electromagnetic drives
    • D05B69/12—Electrical or electromagnetic drives using rotary electric motors
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B47/00—Needle-thread tensioning devices; Applications of tensometers
    • D05B47/04—Automatically-controlled tensioning devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B49/00—Take-up devices, e.g. levers, for the needle thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D05B55/14—Needle-bar drives

Definitions

  • the invention has for its object to design a sewing machine of the generic type so that an optimization of the movement of the needle and the thread tension over a cycle of movement of the at least one needle bar with needle is possible.
  • At least one controllable needle bar drive motor designed as a servomotor is provided, which is in a drive connection independent of the arm shaft with the at least one needle bar and the thread lever connected to it.
  • the needle bars can be driven so that different lengths stitches are formed, which may be desirable for decorative stitching.
  • the respective stitch length is in this case an integral multiple of the individual transport steps, which is readily realizable in particular with relatively slow-running sewing machines.
  • the controller can be programmed so that the needle bar and the thread lever are not moved to top dead center, but are stopped before. For the next stitch formation of the drive of the needle bar and thus the thread lever runs backwards. So it is possible to pull away less needle thread with the first stitches of a needle and thus to improve the beginning of the seam.
  • the measures described above can be achieved by appropriate programming of the controller.
  • the puncture forces can also be programmed. The basis for this, however, is the described separation of the needle bar drive and the thread lever drive from the arm shaft and thus from the alternating top feed.
  • the measures according to the invention are particularly advantageous in two-needle sewing machines.
  • a needle bar with thread lever can be switched off by switching off a drive motor. In this case, therefore, there is no disturbing thread advancement during needle standstill.
  • the sewing machine shown in the drawing is a two-needle lockstitch sewing machine. It has in the usual way an upper arm 1, a box-like lower base plate 2 and a arm 1 and the base plate 2 connecting to a C-shape vertical stand 3.
  • arm 1 an arm shaft 4 is arranged.
  • a lower shaft 5 is rotatably mounted, which is coupled to the arm shaft 4 by means of a toothed belt drive 6 with a transmission ratio of 1: 1.
  • a main drive motor 7 is further attached, which is connected to the lower shaft 5 by means of a toothed belt drive 8. The arm shaft 4 and the lower shaft 5 are thus driven by the main drive motor 7 at an identical speed.
  • a handwheel 9 is mounted in the usual manner. Adjacent to the handwheel 9, a position sensor 10 is attached to the arm shaft 4, which emits a signal in the usual manner at equal angular intervals during revolutions of the arm shaft 4, resulting in each case in the central controller 11, the exact angular position of the arm shaft 4 and thus also the lower shaft. 5 is determined.
  • two needle bars 12, 13, namely a first needle bar 12 and a second needle bar 13 are juxtaposed in an xyz plane, y defining the longitudinal direction of the sewing machine, z the vertical direction of movement of the needle bars 12, 13 and x the sewing direction.
  • the needle bars 12, 13 have needles 12a, 13a in the usual way for guiding needle threads, not shown.
  • the drive of the needle bars 12, 13 via basically known crank mechanisms, namely a first crank mechanism 14 and a second crank mechanism 15. Synchronously to the first and the second needle bar 12, 13, a first thread lever 16 and a second thread lever 17 are also driven.
  • the drive of the crank mechanisms 14, 15 is not effected - as usual - by means of the arm shaft 4, but by means of mutually independent needle bar drive motors 18, 19, namely a first needle bar drive motor 18 and a second needle bar drive motor 19th
  • These motors 18, 19 are servo motors connected to the controller 11 and controllable by them, in particular stepper motors.
  • the second crank drive 15 is driven by the second needle bar drive motor 19 by means of a second toothed belt drive 23 via a second crank drive shaft 24 which is stationary in a second bearing 25 in the arm 1, but freely rotatably supported.
  • the thread levers 16 and 17 are driven by the crankshaft shafts 21 and 24 respectively.
  • each a gripper 27, 27 a driven in the usual manner via an angle gear 26, 26 a.
  • the grippers 27, 27a are lockstitch grippers which in the usual way each contain a spool (not shown) with a supply of looper thread.
  • each one next to the gripper 27 and 27a befind Anlagen sub-conveyor 30 is driven, of which only one conveyor is shown.
  • This subtransporter 30 is designed such that the usual transport movement in the sewing direction (x-direction) is carried out in the raised state, while the return movement takes place in the lowered state.
  • the arm shaft 4 ends - seen from the handwheel 9 - before the second crank mechanism 15 in the second crank shaft 24 and is stored there in a arm shaft bearing 32 and supported by the bearing 25 relative to the arm 1.
  • a swinging shaft 34 which in turn via a rocker arm drive 35, a cloth pusher bar 36 and a top feed Rod 37 alternately drives.
  • the presser foot 38 attached to the fabric pusher bar 36 presses the needle plate 39 on the needle plate 39 on the base plate 2 above the gripper 27, the upper transport bar 37 is lifted off the fabric with its transport foot 40.
  • the transport foot 40 located on the top transport bar 37 is lowered onto the work piece and transports it together with the bottom feed dog 30 in the sewing direction x.
  • the eccentric gear 33 with the oscillating shaft 34 and the oscillating shaft drive 35 connecting the oscillating shaft 34 to the rods 36, 37 thus form a so-called hopping gear.
  • the controller 11 is programmable. It is coupled to the main drive motor 7, the needle bar drive motors 18, 19 and the position encoder 10. About them the initially described different functions can be controlled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (5)

  1. Machine à coudre comprenant
    - une plaque de base (2) inférieure de type boîtier,
    - un bras supérieur (1),
    - un support (3) reliant la plaque de base (2) au bras (1),
    - un arbre de bras (4) logé dans le bras (1),
    - une pince (27, 27a) logée dans la plaque de base (2),
    - un moteur d'entraînement principal (7) pour l'entraînement de l'arbre de bras (4) et de la pince (27),
    - au moins une barre à aiguille (12, 13) pouvant être entraînée,
    - un levier releveur de fil (16, 17) relié à la barre à aiguille (12, 13),
    - un pied-de-biche (36, 38') qui est en liaison d'entraînement avec l'arbre de bras (4) et
    - un dispositif de transport de produits à coudre, caractérisée en ce qu'au moins un moteur d'entraînement de barre à aiguille (18, 19) pouvant être commandé et réalisé comme un servomoteur est prévu, lequel est en liaison d'entraînement indépendante de l'arbre de bras (4) avec au moins une barre à aiguille (12, 13) et le levier releveur de fil (16, 17) relié avec celle-ci.
  2. Machine à coudre selon la revendication 1, caractérisée en ce qu'une première barre à aiguille (12) est reliée par le biais d'une première commande à manivelle (14) et un premier levier releveur de fil (16) est relié respectivement au moyen d'un premier arbre de commande à manivelle (21) à un premier moteur d'entraînement de barre à aiguille (18) et
    en ce qu'une seconde barre à aiguille (13) est reliée par la biais d'une seconde commande à manivelle (15) et un second levier releveur de fil (17) est relié respectivement au moyen d'un second arbre de commande à manivelle (24) à un second moteur d'entraînement de barre à aiguille (19).
  3. Machine à coudre selon la revendication 1 ou 2, caractérisée en ce qu'un transmetteur de position (10) détectant la vitesse de rotation de l'arbre de bras (4) et de la pince (27) est prévu et
    en ce que le moteur d'entraînement principal (7), au moins un moteur d'entraînement de barre à aiguille (18, 19) et le transmetteur de position (10) sont reliés à une commande commune (11).
  4. Machine à coudre à deux aiguilles selon la revendication 1, caractérisée en ce qu'un transporteur supérieur (37, 40) est prévu, lequel est en liaison d'entraînement avec l'arbre de bras (4).
  5. Machine à coudre à deux aiguilles selon la revendication 4, caractérisée en ce que le pied-de-biche (36, 38) et le transporteur supérieur (37, 40) sont reliés par un engrenage excentrique (33) à l'arbre de bras (4).
EP09012000A 2008-10-29 2009-09-22 Machine à coudre Not-in-force EP2182102B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008053750A DE102008053750A1 (de) 2008-10-29 2008-10-29 Nähmaschine

Publications (2)

Publication Number Publication Date
EP2182102A1 EP2182102A1 (fr) 2010-05-05
EP2182102B1 true EP2182102B1 (fr) 2011-06-08

Family

ID=41693522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09012000A Not-in-force EP2182102B1 (fr) 2008-10-29 2009-09-22 Machine à coudre

Country Status (6)

Country Link
EP (1) EP2182102B1 (fr)
JP (1) JP5514510B2 (fr)
KR (1) KR101537823B1 (fr)
CN (1) CN101724993B (fr)
AT (1) ATE512245T1 (fr)
DE (1) DE102008053750A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104928860A (zh) * 2015-06-11 2015-09-23 张文勇 一种编织帽专用链式缝纫机
CN105671800B (zh) * 2016-04-15 2018-06-29 黄广建 一种缝纫机的压布驱动机构、压布装置及缝纫机
CN106835523A (zh) * 2017-03-10 2017-06-13 陈志锋 一种挑线装置
CN212175205U (zh) * 2019-09-25 2020-12-18 浙江合和机电有限公司 一种独立压脚驱动机构及绣花机

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB164400A (en) * 1920-09-16 1921-06-15 Frederick John Turner Bell Improvements in and relating to sewing machines
GB471276A (en) 1936-05-11 1937-09-01 Singer Mfg Co Improvements in or relating to sewing machines
DE955023C (de) * 1955-08-25 1956-12-27 Duerkoppwerke Ag Mehrnadelnaehmaschine, insbesondere Zweindelnaehmaschine, mit einer Einrichtung zum wahlweisen Ein- und Ausschalten der Nadelstangen
JPH0451991A (ja) * 1990-06-18 1992-02-20 Tokai Ind Sewing Mach Co Ltd 刺繍ミシン
JP2924504B2 (ja) * 1992-10-23 1999-07-26 ブラザー工業株式会社 ミシン
IT1272600B (it) 1993-09-10 1997-06-26 Rimoldi S R L Ora Rimoldi Necc Dispositivo per formare una catenella continua in macchine per cucire a punto ornamento senza copertura a piu' aghi
DE19538362C1 (de) * 1995-10-14 1996-12-19 Itwe V Chemnitz Näharbeitsplatz
DE19538293A1 (de) * 1995-10-14 1997-04-17 Elektrische Automatisierungs U Nähmaschine mit Einzelantrieben
DE19827846C2 (de) * 1998-06-23 2001-05-31 Frankl & Kirchner Antrieb für eine Nähmaschine, insbesondere eine Industrienähmaschine
GB2353297B (en) 1999-08-16 2003-07-23 Duerkopp Adler Ag A double lockstitch machine comprising a thread gripper
DE19951127C2 (de) * 1999-10-23 2002-06-20 Duerkopp Adler Ag Knopfloch-Nähmaschine
DE102005029955A1 (de) * 2005-06-28 2007-01-04 Dürkopp Adler AG Nähmaschine
DE102006045229A1 (de) * 2006-09-26 2008-04-03 Schaeffler Kg Stickkopf
CN201132889Y (zh) * 2007-10-18 2008-10-15 中捷缝纫机股份有限公司 一种自动缝纫装置

Also Published As

Publication number Publication date
KR101537823B1 (ko) 2015-07-17
CN101724993B (zh) 2013-02-13
JP2010104780A (ja) 2010-05-13
ATE512245T1 (de) 2011-06-15
DE102008053750A1 (de) 2010-05-06
EP2182102A1 (fr) 2010-05-05
JP5514510B2 (ja) 2014-06-04
CN101724993A (zh) 2010-06-09
KR20100047805A (ko) 2010-05-10

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