EP2107147B1 - Dispositif et procédé de préparation d'au moins un fil dans une machine à coudre à point noué - Google Patents

Dispositif et procédé de préparation d'au moins un fil dans une machine à coudre à point noué Download PDF

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Publication number
EP2107147B1
EP2107147B1 EP20080008338 EP08008338A EP2107147B1 EP 2107147 B1 EP2107147 B1 EP 2107147B1 EP 20080008338 EP20080008338 EP 20080008338 EP 08008338 A EP08008338 A EP 08008338A EP 2107147 B1 EP2107147 B1 EP 2107147B1
Authority
EP
European Patent Office
Prior art keywords
thread
thread guide
needle
guide
deflections
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.)
Expired - Fee Related
Application number
EP20080008338
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German (de)
English (en)
Other versions
EP2107147A1 (fr
Inventor
Hartmut Klapp
Klaus Stutznäcker
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.)
Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG
Original Assignee
Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG
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Publication date
Application filed by Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG filed Critical Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG
Publication of EP2107147A1 publication Critical patent/EP2107147A1/fr
Application granted granted Critical
Publication of EP2107147B1 publication Critical patent/EP2107147B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B49/00—Take-up devices, e.g. levers, for the needle thread
    • D05B49/02—Take-up devices, e.g. levers, for the needle thread operated by cams or linkages

Definitions

  • the invention relates to a device for providing at least one needle thread in a lockstitch sewing machine, in particular a lockstitch sewing machine, with a first thread guide and a second thread guide, which are driven to oscillate at a certain frequency, wherein the needle thread from the first thread guide to the second thread guide and of the second thread guide extends to an oscillating in a certain frequency moving needle.
  • the invention further relates to a method for operating a lockstitch sewing machine, in particular a lockstitch sewing machine, namely for feeding at least one needle thread, in which the needle thread is withdrawn from a storage device and fed to a driven with a specific frequency needle, wherein the needle thread from the storage device coming from a first Thread guide and subsequently a second thread guide is supplied, from where the needle thread of the needle is supplied and wherein at least one, in particular both thread guide (s) is driven to oscillate in a certain frequency or be.
  • a lockstitch sewing machine in particular a lockstitch sewing machine, namely for feeding at least one needle thread, in which the needle thread is withdrawn from a storage device and fed to a driven with a specific frequency needle, wherein the needle thread from the storage device coming from a first Thread guide and subsequently a second thread guide is supplied, from where the needle thread of the needle is supplied and wherein at least one, in particular both thread guide (s) is driven to oscillate in a certain frequency or be.
  • the subject of the invention is a thread take-up for a sewing machine, preferably for a multi-needle lockstitch machine, with at least one oscillating moved needle and two thread guides for one thread, namely upper thread, the thread guides at a distance from each other to two about its longitudinal axis back and forth Shafts are fastened, wherein furthermore the shafts for the purpose of generating the oscillating movements are each driven swinging by a crank and wherein the cranks are designed and matched to each other, that a thread tightening is generated by the oscillating movements.
  • a thread take-up device for sewing machines in particular for multi-needle lockstitch sewing machines, wherein the upper thread passes through two thread guides, which are fixed at a distance from each other on two longitudinal axes about herschwenkbaren waves, further wherein the waves for the purpose of generating the oscillating movements of a respective crank mechanism are driven and wherein finally the crank mechanisms are designed and matched to one another that is generated by the oscillating movements of the thread suit.
  • this previously known thread feeder it is provided that one of the two thread guides can be driven with a frequency which is different from the frequency of the needle by a whole multiple, the amplitudes of the two thread guides being in a very specific relationship.
  • the adjustability of the amplitudes of the thread guides is achieved by rods are hinged adjustable to drive levers. It is also known that in this thread take-up the amplitude ratio of the two thread guides is 1: 1/3 to 1: 2/3.
  • a generic device is further from the US 4,907,517 known.
  • the invention is therefore an object of the invention to provide a device for providing at least one thread in a lockstitch sewing machine or a method for operating a lockstitch sewing machine, with or with the fast-running multi-needle stitch sewing machines, in particular multi-needle lockstitch Sewing machines can be operated, the forces occurring and the associated vibrations of the components can be reduced to a minimum.
  • a fixable relative to the thread guide deflection device is arranged for the needle thread, which has at least two deflections, of which a deflection in the yarn conveying direction to the needle in front of the thread guide and a deflection is arranged in the thread conveying direction to the needle after the thread guide and the thread guide is moved along a movement path which intersects an imaginary plane spanned between the deflections.
  • both thread guides are driven at the frequency of the needle and that at least in the region of a thread guide a relatively fixed to the thread guide deflection device for the needle thread is arranged, the at least two Deflections has, of which a deflection in the conveying direction of the needle thread to the needle before the thread guide and a deflection in the conveying direction of the needle thread to the needle after the thread guide is arranged and the thread guide is moved along a movement path which intersects an imaginary plane spanned between the deflections.
  • the deflections may be formed as eyelets or rods, wherein the rods preferably have a round cross-section.
  • the bar embodiment has proven to be effective since these rods can extend over a plurality of needles, with a configuration in which the rods extend over the entire length of the sewing area of such a lockstitch sewing machine.
  • the deflection device is preferably fastened to a machine frame of the lockstitch machine.
  • the deflection device is adjustable relative to the machine frame and fixable in different positions.
  • the path of movement of the thread guide relative to the deflection device can be adjusted so that different courses of the essentially sinusoidal movements can be set as a function of the further construction of the lockstitch sewing machine, namely, for example, the gripper, the sewing process and the stitch formation. In this way, the course of the substantially sinusoidal movements of the thread guides with respect to a fast thread tightening and a relatively slow yarn return can be accurately adjusted.
  • the movement path of the thread guide runs essentially in the middle between the deflections of the deflection device.
  • this orientation of the thread guide adjustable relative to the deflections in order to be able to make influences on the movement sequences of the threads with regard to a fast thread tightening and a relatively slow thread return.
  • the thread guide as an eyelet or rod, which preferably has a round cross-section.
  • a training this Embodiment provides that at least the, a movement path between the deflections continuous thread guide is formed of two parallel and spaced-apart rods.
  • the thread is guided in this embodiment between the two rods, these rods should have a surface with low frictional resistance, so that the thread runs with the least possible frictional resistance on the rods. It has been shown that in such an embodiment, the rods in cross-section need not be circular.
  • rods are rounded in the area of their mutually facing surfaces, so that the rods can furthermore have a cross section deviating from a circular cross section.
  • cross-section which is for example elliptical, partially elliptical or parabolic.
  • the needle is driven at a frequency corresponding to the oscillating movement of the thread guide. It can be provided that the needle is driven at a frequency corresponding to the frequency of both thread guides or only a thread guide.
  • the thread guides can also be moved in an oscillating manner with different frequencies in order to allow an advantageous thread suit and a favorable thread return.
  • the deflection device is preferably fixed relative to the thread guide as a function of a desired, essentially sinusoidal course of movement of the first and / or second thread guide, wherein the adjustment of the deflection device can take place in a region which corresponds to the length of the movement path of the thread guide.
  • a handlebar 10 is further provided, on the one hand articulated on the needle carrier 12 and on the other hand articulated on the machine frame eleventh is attached.
  • the sewing unit 1 also has a device for providing the thread 6, which has a first thread guide 12 and a second thread guide 13.
  • the first thread guide 12 consists of two spaced apart and parallel aligned rods 14, between which the thread 6 runs.
  • the rods 14 extend parallel over the entire length of the sewing unit 1.
  • the rods 14 are arranged at a free end of an L-shaped lever 15 which is rotatably connected to a rotationally driven shaft 16 driven.
  • FIG. 3 is the sewing unit 1 according to FIG. 1 shown in detail, wherein in addition the rotational vibration movement directions of the shafts 8, 16 and 18 are represented by corresponding circular arc segment-shaped double arrows.
  • the thread 6 has an arrowhead which indicates the usual conveying direction of the thread 6.
  • a double arrow is also provided in the region of the right needle 5, which indicates the directions of movement of the needle carrier 2.
  • the cantilever 21 with the carrier 20 in different positions relative to the machine frame 11 can be attached thereto.
  • a stepless adjustment is provided for this purpose, so that in this way the course of the imaginary plane 23 relative to inflection points of the first thread guide 12 is adjustable.
  • the above-described apparatus makes it possible to set a resulting curve from the movements of the two thread guides 12 and 13, which falls steeply within a relatively small angular range from a maximum to a minimum, which in practice is a fast thread take-up corresponds, while in each case between these steep curve pieces a flat curve is given, which corresponds to a relatively slow yarn return in practice.
  • FIG. 2 a second embodiment of the sewing unit 1 is shown.
  • this second embodiment according to FIG. 2 are with the embodiment according to FIG. 1 matching design elements with identical reference numerals.
  • FIG. 2 corresponds structurally and in terms of their operation essentially the embodiment according to FIG. 1
  • the second thread guide 13 has a second deflection 19 'with deflections 22', between which a further imaginary plane 23 'is formed.
  • FIG. 2 Accordingly, the second thread guide 13 corresponding to the first thread guide 12 according to FIG. 1 but also according to FIG. 2 guided on a path of movement, which intersects between the deflections 22 'imaginary plane 23' intersects. As a result, the movement of the second thread guide 13 with a certain frequency in a substantially sinusoidal curve with twice the frequency is shown.
  • FIG. 4 shows a further embodiment of a sewing unit 1, which substantially with the embodiment according to the FIG. 3 matches, but the lever 15 and the deflector 19 is disposed above the lever 17 with the thread guide 13.
  • FIG. 5 Another embodiment of the sewing unit 1 is shown, with the embodiment of the sewing unit according to FIG. 2
  • FIG. 3 described directions of movement of the individual construction elements are supplemented by arrows.
  • FIGS. 6 to 8 the levers 17 and 15 in different positions relative to the cantilever 21, so that the movement starting in FIG. 6 about the FIG. 7 in the position of FIG. 8 can be seen.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (21)

  1. Dispositif de préparation d'au moins un fil dans une machine à coudre à point noué, notamment une machine à coudre à double point noué, comportant un premier guide-fil et un deuxième guide-fil qui sont entraînés en oscillant à une certaine fréquence, le fil s'étendant du premier guide-fil au deuxième guide-fil et du deuxième guide-fil à une aiguille bougeant à une certaine fréquence,
    caractérisé en ce que,
    au moins au niveau d'un guide-fil (12, 13), est disposé un système d'inversion (19, 19') pouvant être bloqué par rapport au guide-fil (12, 13) pour le fil (6) et comportant au moins deux inverseurs (22, 22') dont un inverseur (22, 22') est disposé dans le sens de convoyage du fil (6) vers l'aiguille (5) avant le guide-fil (12, 13) et un inverseur (22, 22') est disposé dans le sens de convoyage du fil (6) vers l'aiguille (5) après le guide-fil (12, 13) et que le guide-fil (12, 13) bouge le long d'une voie de mouvement qui coupe un plan imaginaire (23, 23') sous-tendu entre les inverseurs (22, 22').
  2. Dispositif selon la revendication 1, caractérisé en ce que le premier guide-fil (12) est disposé en dessous du deuxième guide-fil (13) et que le fil (6) est guidé le long d'une voie de mouvement sensiblement en forme de S.
  3. Dispositif selon la revendication 1, caractérisé en ce que la fréquence du mouvement de l'aiguille équivaut au mouvement oscillant d'au moins un, de préférence les deux, guide-fil(s) (12, 13).
  4. Dispositif selon la revendication 1, caractérisé en ce qu'au moins un inverseur (22, 22') se présente sous la forme d'un oeillet.
  5. Dispositif selon la revendication 1, caractérisé en ce qu'au moins un inverseur (22, 22') se présente sous la forme d'une barre qui présente de préférence une section transversale ronde.
  6. Dispositif selon la revendication 1, caractérisé en ce que le système d'inversion (19, 19') est fixé à un bâti mécanique (11) de la machine à coudre à point noué.
  7. Dispositif selon la revendication 6, caractérisé en ce que le système d'inversion (19, 19') est réglable par rapport au bâti mécanique (11) et peut être fixé dans différentes positions.
  8. Dispositif selon la revendication 1, caractérisé en ce que la voie de mouvement du guide-fil (12, 13) s'étend sensiblement au centre entre les inverseurs (22, 22') du système d'inversion (19, 19').
  9. Dispositif selon la revendication 1, caractérisé en ce que les guide-fils (12, 13) bougent en oscillant aux mêmes fréquences.
  10. Dispositif selon la revendication 1, caractérisé en ce que les guide-fils (12, 13) bougent en oscillant à des fréquences différentes.
  11. Dispositif selon la revendication 1, caractérisé en ce qu'au moins un guide-fil (12, 13') se présente sous la forme d'un oeillet.
  12. Dispositif selon la revendication 1, caractérisé en ce qu'au moins un guide-fil (12, 13') se présente sous la forme d'une barre (14) qui présente de préférence une section transversale ronde.
  13. Dispositif selon la revendication 12, caractérisé en ce qu'au moins le guide-fil (12, 13) traversant une voie de mouvement entre les inverseurs (22, 22') est constitué de deux barres (14) s'étendant parallèlement à distance l'une de l'autre.
  14. Dispositif selon une des revendications 5, 12 ou 13, caractérisé en ce que la(les) barre(s) (14) s'étend(ent) au moins sur une zone partielle d'un porte-aiguille (2) pourvu de plusieurs, à savoir au moins deux, aiguilles (5).
  15. Dispositif selon la revendication 1, caractérisé en ce qu'au moins les inverseurs (22, 22') du système d'inversion (19, 19') sont disposés aux extrémités libres des branches d'un support (20) réalisé en forme de U.
  16. Procédé d'utilisation d'une machine à coudre à point noué, notamment une machine à coudre à double point noué, à savoir d'acheminement d'au moins un fil, dans lequel le fil est extrait d'un dispositif de réserve et est acheminé vers une aiguille entraînée à une certaine fréquence, le fil étant acheminé depuis le dispositif de réserve vers premier guide-fil puis vers un deuxième guide-fil d'où le fil est acheminé vers l'aiguille et au moins un, notamment deux, guide-fil(s) étant entraîné(s) en oscillant à une certaine fréquence,
    caractérisé en ce que,
    le fil (6) est guidé par au moins un système d'inversion (19, 19') comportant deux inverseurs (22, 22') et que le guide-fil (12, 13) bouge en oscillant avec le fil (6) le long d'une voie de mouvement coupant un plan imaginaire (23, 23') sous-tendu entre les inverseurs (22, 22'), la voie de mouvement présentant deux points de retournement qui sont situés des deux côtés du plan imaginaire (23, 23').
  17. Procédé selon la revendication 15, caractérisé en ce que l'aiguille (5) est entraînée à une fréquence qui équivaut à celle du mouvement oscillant du(des) guide-fil(s) (12, 13).
  18. Procédé selon la revendication 16, caractérisé en ce que les guide-fils (12, 13) bougent en oscillant à des fréquences différentes.
  19. Procédé selon la revendication 16, caractérisé en ce que le mouvement d'inversion (19, 19') est défini en fonction d'une évolution souhaitée sensiblement sinusoïdale du premier et/ou deuxième guide-fil (12, 13) par rapport au guide-fil (12, 13), le réglage du système d'inversion (19, 19') pouvant avoir lieu dans une zone qui équivaut à la longueur de la voie de mouvement du guide-fil (12, 13).
  20. Procédé selon la revendication 16, caractérisé en ce que le guide-fil (12, 13) passe sensiblement au centre du plan imaginaire (23, 23') entre les inverseurs (22, 22') du système d'inversion (19, 19').
  21. Distributeur de fil pour machine à coudre, de préférence machine à coudre à double point noué à aiguilles multiples, comportant au moins une aiguille bougeant en oscillant et deux guide-fils respectivement pour un fil, à savoir le fil supérieur, les guide-fils étant fixés à distance l'un de l'autre sur deux arbres pivotant en va et vient autour de leur axe longitudinal, les arbres étant en outre, pour générer les mouvements oscillants, entraînés chacun par une manivelle et les manivelles étant conçues et adaptées l'une à l'autre de manière à générer une traction de fil par les mouvements oscillants, caractérisé en ce que
    les deux guide-fils (12, 13) sont entraînés à la fréquence de l'aiguille (5) et que, au moins au niveau d'un guide-fil (12, 13), est disposé un système d'inversion (19, 19') pour le fil (9) pouvant être bloqué par rapport au guide-fil (12, 13) et comportant au moins deux inverseurs (22, 22') dont un inverseur (22, 22') est disposé dans le sens de convoyage du fil (6) vers l'aiguille (5) avant le guide-fil (12, 13) et un inverseur est disposé dans le sens de convoyage du fil (6) vers l'aiguille (5) après le guide-fil (12, 13) et que le guide-fil (12, 13) bouge le long d'une voie de mouvement qui coupe un plan imaginaire (23, 23') sous-tendu entre les inverseurs (22, 22').
EP20080008338 2008-03-31 2008-05-02 Dispositif et procédé de préparation d'au moins un fil dans une machine à coudre à point noué Expired - Fee Related EP2107147B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008016695 2008-03-31

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EP2107147A1 EP2107147A1 (fr) 2009-10-07
EP2107147B1 true EP2107147B1 (fr) 2011-01-26

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DE (1) DE502008002471D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2801651A1 (fr) * 2013-05-10 2014-11-12 Chee Siang Industrial Co., Ltd. Mécanisme de routage de fil pour machine à coudre
CN106757841B (zh) * 2016-12-19 2020-08-04 杰克缝纫机股份有限公司 一种打线架结构及缝纫机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE250179C (fr) *
DE2247050C3 (de) * 1972-09-26 1975-08-07 Stutznaecker Emil Naehmasch Fadengeber für Nähmaschinen, vorzugsweise für Vielnadel-Doppelsteppstichmaschinen
CH640282A5 (de) * 1979-11-19 1983-12-30 Gegauf Fritz Ag Nadelfaden-fuehrungsvorrichtung mit vertikal oszillierendem fadenhebel an einer naehmaschine mit intervallweise wirkendem fehlstichmechanismus.
AU576149B2 (en) * 1985-05-07 1988-08-11 Maruzen Sewing Machine Co., Ltd. Thread guide
JPS62170289A (ja) * 1986-01-21 1987-07-27 ブラザー工業株式会社 ミシンの糸取上装置
JPH0728975B2 (ja) * 1987-03-19 1995-04-05 蛇の目ミシン工業株式会社 ミシンの自動上糸掛け装置

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EP2107147A1 (fr) 2009-10-07
DE502008002471D1 (de) 2011-03-10

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