EP1155181A1 - Sewing machine with a thread withdrawing device - Google Patents

Sewing machine with a thread withdrawing device

Info

Publication number
EP1155181A1
EP1155181A1 EP00991240A EP00991240A EP1155181A1 EP 1155181 A1 EP1155181 A1 EP 1155181A1 EP 00991240 A EP00991240 A EP 00991240A EP 00991240 A EP00991240 A EP 00991240A EP 1155181 A1 EP1155181 A1 EP 1155181A1
Authority
EP
European Patent Office
Prior art keywords
thread
needle
sewing machine
rest position
pin
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
EP00991240A
Other languages
German (de)
French (fr)
Other versions
EP1155181B1 (en
Inventor
Franz Gries
Hermann Rutz
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.)
Pfaff Industriemaschinen GmbH
Original Assignee
GM Pfaff 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 GM Pfaff AG filed Critical GM Pfaff AG
Publication of EP1155181A1 publication Critical patent/EP1155181A1/en
Application granted granted Critical
Publication of EP1155181B1 publication Critical patent/EP1155181B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/06—Devices for severing the needle or lower thread and for disposing of the severed thread end ; Catching or wiping devices for the severed thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B49/00—Take-up devices, e.g. levers, for the needle thread

Definitions

  • the invention relates to a sewing machine according to the preamble of claim 1.
  • Such thread pulling devices could be used in which the end of the needle thread is moved out of the area of the presser foot not by a mechanical thread wiper but by a compressed air stream.
  • Such a thread path pulling device is known, for example, from US Pat. No. 3,371,632.
  • Such devices are disadvantageous compared to mechanically acting devices insofar as resistant and possibly additionally twisted threads u. U. are insufficiently pulled away from the area of the presser foot can and the facilities also require a comparatively high compressed air and thus energy consumption.
  • the invention has for its object to provide a thread-pulling device that can be used without restriction both in the processing of thin and particularly thick material.
  • the object is achieved by the characterizing features of claim 1.
  • the invention is based on the idea of pulling the needle thread end back through the needle eye by the pin which can be moved transversely to the path of the needle thread, that on the one hand the presser foot cannot lower the thread end between itself and the sewing material when lowering, and on the other hand the thread end hanging down from the needle eye is still of sufficient length for perfect thread linking at the beginning of the next sewing process.
  • an essential prerequisite for secure thread linking is that the withdrawn thread quantity is released before the sewing starts again and is thus available as a free thread reserve.
  • a thread path pulling device which, in addition to a thread wiper, also has a thread pull-back pin which can be moved transversely to the path of the needle thread.
  • This thread retraction pin which can be moved simultaneously with the thread wiper, is intended to support the effect of the thread wiper, which only has a comparatively small pivoting path, by additionally pulling a small amount of thread back through the eye of the needle. Since this thread retraction pin thus only serves as an aid in addition to the actual thread path pulling means, namely the thread wiper, by using the thread wiper and the like.
  • the DE-GM could not have suggested the idea of the invention, namely to create a thread pulling device that only has a thread retraction pin.
  • Fig. 1 is a side view of a sewing machine
  • Fig. 2 is a view of the inside of the head cover
  • Fig. 3 is a sectional view of the head cover.
  • the base plate is designated 1, the housing base with 2 and the head cover closing the housing head with 3.
  • the sewing machine has a needle bar 4 which can be moved up and down with a thread-guiding needle 5, a thread feeder 6, a thread tensioning device 7 and a presser bar 8 with a presser foot 9 which can be moved up and down between a rest position and a pressing position ,
  • a gripper 10 cooperating with the needle 5 and a thread cutting device 11 are arranged in the base plate 1.
  • an angle lever 13 is mounted on a bolt 12, the arms of which are designated 14 and 15.
  • the arm 14 is in drive connection with a pressure air cylinder 16 by a hinge pin 17, which is received in a fork head 18 fastened to the piston rod, engages in a slot 19 of the arm 14.
  • the compressed air cylinder 16 is arranged on an angular support 20, which in turn can be adjusted in height by means of screws 21 on the head cover 3.
  • a transversely projecting thread retraction pin 22 is attached, the free end of which is shaped into a thread eyelet 23.
  • the compressed air cylinder 16 and the angle lever 13 together form a thread pulling device 24.
  • the angle lever 13 can be pivoted back and forth between a rest position shown in solid lines and a functional position shown in broken lines.
  • the thread retraction pin 22 with the thread eyelet 23 is located between a thread eyelet 25 fastened to the housing head and a thread eyelet 26 attached to the needle bar 4
  • the angle lever 13 remains in its rest position during sewing. Only at the end of a seam is the compressed air cylinder 16 acted upon after thread cutting with an effective thread tensioning device 7, whereby it pivots the angle lever 13 from the rest position into the functional position.
  • the thread retraction pin 22 moves transversely to the path of the needle thread 27 defined by the two thread eyelets 25, 26, as a result of which it pulls out at an angle, as shown in FIG. 1.
  • the thread retraction pin 22 pulls the thread back through the thread eyelet 26 of the needle bar 4 and the unspecified eye of the needle 5 against the normal thread withdrawal direction and in this way shortens the thread end hanging from the needle eye ,
  • the position of the rest and the functional position of the angle lever 13 so that the length of the shortened needle thread end has an optimal dimension, that is, on the one hand it is short enough not to be trapped between the presser foot 9 and the sewing part when the presser foot 9 is lowered onto a new sewing material part and, on the other hand, is long enough for secure thread linking at the start of a new sewing process. It is of great importance that the angle lever 13 is pivoted back into its rest position before the next sewing process begins, so that the thread quantity previously withdrawn is now available as a free thread reserve.

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

Abstract

The invention relates to a sewing machine with a thread withdrawing device (24), which prevents the needle thread end from being caught under the material pressure plate (9), at the beginning of a sewing process. The thread withdrawing device (24) comprises an arm (22), with a thread eyelet (23), said arm being arranged perpendicular to the path of the needle thread (27), running between two thread guides (25, 26). Said arm may be displaced perpendicularly across the said path of the needle thread (27), between a rest position and an operating position.

Description

(84) Bestimmungsstaaten (regional): europäisches Patent (AT, Zur Erklärung der Zweibuchstaben-Codes, und der anderen BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, Abkürzungen wird auf die Erklärungen ("Guidance Notes on NL, PT, SE, TR). Codes and Abbreviations") am Anfang jeder regulären Ausgabe der PCT-Gazette verwiesen(84) States of destination (regional): European patent (AT, to explain the two-letter codes, and the other BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC Abbreviations are referred to the explanations ("Guidance Notes on NL, PT, SE, TR). Codes and Abbreviations") at the beginning of every regular edition of the PCT Gazette
Veröffentlicht:Released:
— Mit internationalem Recherchenbericht.- With an international search report.
— Vor Ablauf der für Änderungen der Ansprüche geltenden Frist, Veröffentlichung wird -wiederholt, falls Änderungen eintreffen - Before the deadline for changes in claims expires, publication will be repeated if changes occur
Nähmaschine mit einer FadenrückzieheinrichtungSewing machine with a thread retractor
Die Erfindung betrifft eine Nähmaschine nach dem Oberbegriff des Anspruches 1.The invention relates to a sewing machine according to the preamble of claim 1.
Wenn vor Beginn eines Nähvorganges der Stoffdrückerfuß der Nähmaschine auf das Nähgut abgesenkt wird, sollte das von der Nadel herabhängende Fadenende nicht unter dem Stoffdrückerfuß liegen, weil sonst die Gefahr besteht, daß das Fadenende zwischen dem Stoffdrückerfuß und dem Nähgut eingeklemmt wird. Dies hätte zur Folge, daß das Fadenende zu Beginn des Nähvorganges nicht auf die Unterseite des Nähgutes gezogen werden könnte, sondern auf der Oberseite als abstehendes, das Erscheinungsbild der Naht beeinträchtigendes Fadenende verbliebe.If the presser foot of the sewing machine is lowered onto the material to be sewn before the start of a sewing process, the thread end hanging from the needle should not lie under the presser foot, otherwise there is a risk that the end of the thread will become trapped between the presser foot and the material. This would have the consequence that the end of the thread could not be pulled onto the underside of the material to be sewn at the beginning of the sewing process, but would remain on the top as a protruding end of the thread which would impair the appearance of the seam.
Um dies zu verhindern, ist es z. B. durch die DE 25 26 694 C2To prevent this, it is e.g. B. by DE 25 26 694 C2
(US 3 901 171) bekannt, das Nadelfadenende mittels einer zwischen dem Stoffdrückerfuß und der Nadel hindurchbewegten, als Fadenwischer ausgebildeten Fadenwegzieheinrichtung aus dem Bereich des Stoffdrückerfußes herauszubewegen. Derartige Fadenwegzieheinrichtungen arbeiten sehr zuverlässig und werden daher häufig angewendet.(US 3 901 171) to move the needle thread end out of the area of the presser foot by means of a thread pulling device, which is designed as a thread wiper and is moved between the presser foot and the needle. Such thread path pulling devices work very reliably and are therefore often used.
Allerdings findet ihr Einsatz bei der Verarbeitung von sehr dickem Nähgut, wie z. B. Polsterware, eine Einschränkung, da in diesem Fall der Abstand zwischen dem Stoffdrückerfuß und der in angehobener Stellung befindlichen Nadel so eng sein kann, daß für die Hindurch- bewegung des Fadenwischers kein ausreichender Platz zur Verfügung steht.However, they are used in the processing of very thick sewing material, such as. B. upholstery, a restriction, since in this case the distance between the presser foot and the needle in the raised position can be so narrow that there is insufficient space for the thread wiper to move through.
Bei der Verarbeitung von dickem Nähgut könnten dagegen solche Fadenwegzieheinrichtungen verwendet werden, bei denen das Nadelfaden- ende nicht durch einen mechanischen Fadenwischer, sondern durch einen Druck luftstrom aus dem Bereich des Stoffdrückerfußes herausbewegt wird. Eine derartige Fadenwegzieheinrichtung ist beispielsweise durch die US 3 371 632 bekannt. Solche Einrichtungen sind aber gegenüber mechanisch wirkenden Einrichtungen insofern nachteilig, als wider- standsfähige und ggf. zusätzlich noch drallbehaftete Fäden u. U. nur unzureichend aus dem Bereich des Stoffdrückerfußes weggezogen werden können und die Einrichtungen überdies einen vergleichsweise hohen Druckluft- und somit Energieverbrauch bedingen.When processing thick sewing material, on the other hand, such thread pulling devices could be used in which the end of the needle thread is moved out of the area of the presser foot not by a mechanical thread wiper but by a compressed air stream. Such a thread path pulling device is known, for example, from US Pat. No. 3,371,632. However, such devices are disadvantageous compared to mechanically acting devices insofar as resistant and possibly additionally twisted threads u. U. are insufficiently pulled away from the area of the presser foot can and the facilities also require a comparatively high compressed air and thus energy consumption.
Der Erfindung liegt die Aufgabe zugrunde, eine Fadenwegzieheinrichtung zu schaffen, die sowohl bei der Verarbeitung von dünnem als auch von besonders dickem Nähgut ohne Einschränkung verwendbar ist. Die Aufgabe wird durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.The invention has for its object to provide a thread-pulling device that can be used without restriction both in the processing of thin and particularly thick material. The object is achieved by the characterizing features of claim 1.
Die Erfindung beruht auf dem Gedanken, das Nadelfadenende durch den quer zum Weg des Nadelfadens bewegbaren Stift gerade so weit durch das Nadelöhr zurückzuziehen, daß einerseits der Stoffdrückerfuß beim Absenken das Fadenende nicht zwischen sich und dem Nähgut einklemmen kann und andererseits das aus dem Nadelöhr herabhängende Fadenende noch eine ausreichende Länge für die einwandfreie Fadenverknüpfung zu Beginn des nächsten Nähvorganges aufweist. Hierbei besteht eine wesentliche Voraussetzung für die sichere Fadenverknüpfung darin, daß die zurückgezogene Fadenmenge vor dem erneuten Nähstart freigegeben wird und auf diese Weise als freie Fadenreserve zur Verfügung steht.The invention is based on the idea of pulling the needle thread end back through the needle eye by the pin which can be moved transversely to the path of the needle thread, that on the one hand the presser foot cannot lower the thread end between itself and the sewing material when lowering, and on the other hand the thread end hanging down from the needle eye is still of sufficient length for perfect thread linking at the beginning of the next sewing process. Here, an essential prerequisite for secure thread linking is that the withdrawn thread quantity is released before the sewing starts again and is thus available as a free thread reserve.
Durch das DE-GM 75 01 449 (US 3847 102) ist eine Fadenwegzieheinrichtung bekannt, die außer einem Fadenwischer auch einen quer zum Weg des Nadelfadens bewegbaren Fadenrückziehstift aufweist. Dieser gleichzeitig mit dem Fadenwischer bewegbare Fadenrückziehstift soll die Wirkung des nur einen vergleichsweise kleinen Schwenkweg ausführenden Fadenwischers unterstützen, indem er zusätzlich eine kleine Fadenmenge durch das Nadelöhr zurückzieht. Da dieser Fadenrückziehstift somit neben dem eigentlichen Fadenwegziehmittel, nämlich dem Fadenwischer, nur als ein Hilfsmittel dient, indem er das durch den Fadenwischer u. U. nicht weit genug vom Stoffdrückerfuß entfernte Fadenende so weit verkürzt, daß es nicht mehr unter dem Stoffdrückerfuß eingeklemmt werden kann, konnte das DE-GM den erfindungsgemäßen Gedanken nicht nahegelegt haben, nämlich eine Fadenwegzieheinrichtung zu schaffen, die ausschließlich nur einen Fadenrückziehstift aufweist.From DE-GM 75 01 449 (US 3847 102) a thread path pulling device is known which, in addition to a thread wiper, also has a thread pull-back pin which can be moved transversely to the path of the needle thread. This thread retraction pin, which can be moved simultaneously with the thread wiper, is intended to support the effect of the thread wiper, which only has a comparatively small pivoting path, by additionally pulling a small amount of thread back through the eye of the needle. Since this thread retraction pin thus only serves as an aid in addition to the actual thread path pulling means, namely the thread wiper, by using the thread wiper and the like. U. Not far enough from the presser foot distant end of the thread so far that it can no longer be pinched under the presser foot, the DE-GM could not have suggested the idea of the invention, namely to create a thread pulling device that only has a thread retraction pin.
Daß die erfindungsgemäße Maßnahme, das Einklemmen des Nadelfadenendes allein durch Verkürzen des Fadenendes zu verhindern, nicht naheliegend gewesen sein kann, ergibt sich insbesondere auch daraus, daß durch die DE-OS 1 933 780 (US 3 640 236) und die DE 22 07 366 B2 (US 3 695 200) vorgeschlagen wird, bei Verwendung eines Fadenwischers eine zusätzliche Fadenreserve für die sichere Fadenverknüpfung zu Beginn des nächsten Nähvorganges bereitzustellen, obwohl durch einen Fadenwischer die Länge des vom Nadelöhr herabhängenden Fadenendes unbeeinflußt bleibt und daher die Fadenverknüpfung zu Beginn des nächsten Nähvorganges nicht beeinträchtigt wird. Diese Fadenreserve wird dadurch erzeugt, daß ein quer zum Weg des Nadelfadens bewegbarer Fadenabziehstift vor dem Fadenschneiden eine bestimmte Fadenmenge durch die geöffnete Fadenspannvorrichtung hindurch vom Fadenvorrat abzieht und vor dem erneuten Nähstart wieder freigibt.That the measure according to the invention, to prevent the pinching of the needle thread end solely by shortening the thread end, could not have been obvious, results in particular from the fact that the DE-OS 1 933 780 (US 3 640 236) and DE 22 07 366 B2 (US 3 695 200) propose, when using a thread wiper, to provide an additional thread reserve for secure thread linking at the beginning of the next sewing process, although by means of a thread wiper the length of the thread end hanging from the eye of the needle remains unaffected and therefore the thread linkage is not impaired at the beginning of the next sewing process. This thread reserve is generated in that a thread pulling pin movable transversely to the path of the needle thread pulls a certain amount of thread through the opened thread tensioning device from the thread supply before thread cutting and releases it again before starting the sewing again.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.
Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels erläutert. Es zeigen:The invention is explained with reference to an embodiment shown in the drawing. Show it:
Fig. 1 eine Seitenansicht einer Nähmaschine;Fig. 1 is a side view of a sewing machine;
Fig. 2 eine Ansicht der Innenseite des Kopfdeckels undFig. 2 is a view of the inside of the head cover and
Fig. 3 eine Schnittdarstellung des Kopfdeckels.Fig. 3 is a sectional view of the head cover.
Von der in Fig. 1 dargestellten Nähmaschine ist die Grundplatte mit 1, der Gehäusesockel mit 2 und der den Gehäusekopf verschließende Kopfdeckel mit 3 bezeichnet.Of the sewing machine shown in Fig. 1, the base plate is designated 1, the housing base with 2 and the head cover closing the housing head with 3.
Die Nähmaschine weist in an sich bekannter Weise eine auf- und abbewegbare Nadelstange 4 mit einer fadenführenden Nadel 5, einen Fadengeber 6, eine Fadenspannvorrichtung 7 und eine zwischen einer Ruhe- und einer Andruckstellung auf- und abbewegbare Stoffdrücker- stange 8 mit einem Stoffdrückerfuß 9 auf. In der Grundplatte 1 sind ein mit der Nadel 5 zusammenarbeitender Greifer 10 sowie eine Fadenschneideinrichtung 11 angeordnet. Auf der Innenseite des Kopfdeckels 3 ist auf einem Bolzen 12 ein Winkelhebel 13 gelagert, dessen Arme mit 14 und 15 bezeichnet sind. Der Arm 14 steht mit einem Druc luftzylinder 16 in Antriebsverbindung, indem ein Gelenkstift 17, der in einem an der Kolbenstange befestigten Gabelkopf 18 aufgenommen ist, in einen Schlitz 19 des Armes 14 eingreift. Der Druckluftzylinder 16 ist auf einem winkelförmigen Träger 20 angeordnet, der wiederum mittels Schrauben 21 am Kopfdeckel 3 höhenmäßig einstellbar ist.In a manner known per se, the sewing machine has a needle bar 4 which can be moved up and down with a thread-guiding needle 5, a thread feeder 6, a thread tensioning device 7 and a presser bar 8 with a presser foot 9 which can be moved up and down between a rest position and a pressing position , A gripper 10 cooperating with the needle 5 and a thread cutting device 11 are arranged in the base plate 1. On the inside of the head cover 3, an angle lever 13 is mounted on a bolt 12, the arms of which are designated 14 and 15. The arm 14 is in drive connection with a pressure air cylinder 16 by a hinge pin 17, which is received in a fork head 18 fastened to the piston rod, engages in a slot 19 of the arm 14. The compressed air cylinder 16 is arranged on an angular support 20, which in turn can be adjusted in height by means of screws 21 on the head cover 3.
Am Ende des Armes 15 ist ein quer abstehender Fadenrückziehstift 22 befestigt, dessen freies Ende zu einer Fadenöse 23 geformt ist. Der Druckluftzylinder 16 und der Winkelhebel 13 bilden gemeinsam eine Fadenwegzieheinrichtung 24.At the end of the arm 15 a transversely projecting thread retraction pin 22 is attached, the free end of which is shaped into a thread eyelet 23. The compressed air cylinder 16 and the angle lever 13 together form a thread pulling device 24.
Gemäß Fig. 2 kann der Winkelhebel 13 zwischen einer in Vollinien dargestellten Ruhestellung und einer strichpunktiert dargestellten Funktionsstellung hin- und hergeschwenkt werden. In der Ruhestellung befindet sich der Fadenrückziehstift 22 mit der Fadenöse 23 zwischen einer am Gehäusekopf befestigten Fadenöse 25 und einer an der Nadel- Stange 4 angebrachten Fadenöse 26. In dieser Stellung läuft der vom2, the angle lever 13 can be pivoted back and forth between a rest position shown in solid lines and a functional position shown in broken lines. In the rest position, the thread retraction pin 22 with the thread eyelet 23 is located between a thread eyelet 25 fastened to the housing head and a thread eyelet 26 attached to the needle bar 4
Fadengeber 6 kommende Nadelfaden 27 im wesentlichen geradlinig von der oberen Fadenöse 25 durch die Fadenöse 23 des Fadenrückziehstiftes 22 hindurch zur unteren Fadenöse 26 an der Nadelstange 4.Thread take-up 6 coming needle thread 27 essentially straight from the upper thread eyelet 25 through the thread eyelet 23 of the thread retraction pin 22 to the lower thread eyelet 26 on the needle bar 4th
Der Winkelhebel 13 verbleibt während des Nähens in seiner Ruhestellung. Erst am Ende einer Naht wird nach dem Fadenschneiden bei wirksamer Fadenspannvorrichtung 7 der Druckluftzylinder 16 beaufschlagt, wodurch er den Winkelhebel 13 aus der Ruhestellung in die Funktionsstellung verschwenkt. Dabei bewegt sich der Fadenrückzieh- stift 22 quer zu dem von den beiden Fadenösen 25, 26 definierten Weg des Nadelfadens 27, wodurch er ihn, wie in Fig. 1 gezeigt, winkelförmig auszieht. Da hierbei der Nadelfaden 27 in der Fadenspannvorrichtung 7 reibschlüssig gehalten wird, zieht der Fadenrückziehstift 22 Faden durch die Fadenöse 26 der Nadelstange 4 und das nicht näher bezeichnete Öhr der Nadel 5 entgegen der normalen Fadenabzugsrichtung zurück und verkürzt auf diese Weise das aus dem Nadelöhr herabhängende Fadenende. Durch Justieren des Trägers 20 läßt sich die Lage der Ruhe- und der Funktionsstellung des Winkelhebels 13 so einstellen, daß die Länge des verkürzten Nadelfadenendes ein optimales Maß hat, d. h., daß es einerseits kurz genug ist, um nicht beim Absenken des Stoffdrückerfußes 9 auf ein neues Nähgutteil zwischen dem Stoffdrückerfuß 9 und dem Nähgutteil eingeklemmt zu werden und andererseits für die sichere Fadenverknüpfung zu Beginn eines neuen Nähvorganges lang genug ist. Hierbei ist es von großer Wichtigkeit, daß vor Beginn des nächsten Nähvorganges der Winkelhebel 13 in seine Ruhestellung zurückgeschwenkt wird, damit die zuvor zurückgezogene Fadenmenge jetzt als freie Faden- reserve zur Verfügung steht. The angle lever 13 remains in its rest position during sewing. Only at the end of a seam is the compressed air cylinder 16 acted upon after thread cutting with an effective thread tensioning device 7, whereby it pivots the angle lever 13 from the rest position into the functional position. The thread retraction pin 22 moves transversely to the path of the needle thread 27 defined by the two thread eyelets 25, 26, as a result of which it pulls out at an angle, as shown in FIG. 1. Since the needle thread 27 is held frictionally in the thread tensioning device 7, the thread retraction pin 22 pulls the thread back through the thread eyelet 26 of the needle bar 4 and the unspecified eye of the needle 5 against the normal thread withdrawal direction and in this way shortens the thread end hanging from the needle eye , By adjusting the carrier 20, the position of the rest and the functional position of the angle lever 13 so that the length of the shortened needle thread end has an optimal dimension, that is, on the one hand it is short enough not to be trapped between the presser foot 9 and the sewing part when the presser foot 9 is lowered onto a new sewing material part and, on the other hand, is long enough for secure thread linking at the start of a new sewing process. It is of great importance that the angle lever 13 is pivoted back into its rest position before the next sewing process begins, so that the thread quantity previously withdrawn is now available as a free thread reserve.

Claims

Schutzansprüche protection claims
1. Nähmaschine mit einer auf- und abbewegbaren Nadelstange (4) mit einer fadenführenden Nadel (5), einem Fadengeber (6), wenigstens einer Fadenspannvorrichtung (7), einer zwischen einer Ruhe- und einer Andruckstellung auf- und abbewegbaren Stoffdrückerstange (8) mit einem auf eine Nähgutauflagefläche absenkbaren Stoffdrückerfuß (9), einem unterhalb der Nähgutauflagefläche angeordneten, mit der Nadel zusammenarbeitenden Greifer (10), einer zumindest für das Durchtrennen des Nadelfadens (27) vorgesehenen Fadenschneideinrichtung (11) und einer nach dem Fadenschneidvorgang betätigbaren Einrichtung (24) zum Wegziehen des vorratseitigen Nadelfadenendes, dadurch gekennzeichnet, daß die Einrichtung (24) zum Wegziehen des Nadelfadenendes von einem Stift (22) gebildet ist, der sich quer zu dem zwischen zwei Fadenführungen (25, 26) verlaufenden Weg des Nadelfadens (27) erstreckt und im wesentlichen quer durch den besagten Weg des Nadelfadens (27) hindurch zwischen einer Ruhestellung und einer Funktionsstellung bewegbar ist, wobei die Bewegung des Stiftes (22) aus der Ruhestellung in die Funktionsstellung nach einem Fadenschneidvorgang bei wirksamer Fadenspannvorrichtung (7) und in Ruhestellung zurück vor einem erneuten Nähstart erfolgt.1. Sewing machine with a needle bar (4) that can be moved up and down with a thread-guiding needle (5), a thread feeder (6), at least one thread tensioning device (7), a fabric presser rod (8) that can be moved up and down between a rest position and a pressure position. with a presser foot (9) that can be lowered onto a workpiece support surface, a gripper (10) arranged below the workpiece support surface and cooperating with the needle, a thread cutting device (11) provided at least for severing the needle thread (27) and a device (24) that can be actuated after the thread cutting process ) for pulling away the end of the needle thread, characterized in that the device (24) for pulling the end of the needle thread is formed by a pin (22) which extends transversely to the path of the needle thread (27) running between two thread guides (25, 26) and substantially across said path of needle thread (27) between a rest position and a functional position is movable, the movement of the pin (22) from the rest position into the functional position after a thread cutting operation with an effective thread tensioning device (7) and in the rest position back before a new sewing start.
2. Nähmaschine nach Anspruch 1, dadurch gekennzeichnet, daß auf einem am Kopfdeckel (3) des Maschinengehäuses angeordneten2. Sewing machine according to claim 1, characterized in that arranged on a on the head cover (3) of the machine housing
Bolzen (12) ein Winkelhebel (13) gelagert ist, dessen einer Arm (15) den Stift (22) trägt und dessen anderer Arm (14) mit einem innerhalb des Kopfdeckels (3) angeordneten Antriebsmittel (16) verbunden ist.Bolt (12) an angle lever (13) is mounted, one arm (15) carries the pin (22) and the other arm (14) is connected to a drive means (16) arranged inside the head cover (3).
3. Nähmaschine nach Anspruch 2, dadurch gekennzeichnet, daß das Antriebsmittel (16) auf einem innerhalb des Kopfdeckels (3) einstellbar befestigten Träger (20) angeordnet ist.3. Sewing machine according to claim 2, characterized in that the drive means (16) is arranged on an adjustable within the head cover (3) carrier (20).
4. Nähmaschine nach Anspruch 2 oder 3, dadurch gekennzeichnet,, daß als Antriebsmittel ein Druckluftzylinder (16) oder ein Elektromagnet verwendet wird. 4. Sewing machine according to claim 2 or 3, characterized in that a compressed air cylinder (16) or an electromagnet is used as the drive means.
EP00991240A 1999-12-22 2000-12-21 Sewing machine with a thread withdrawing device Expired - Lifetime EP1155181B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29922786U DE29922786U1 (en) 1999-12-22 1999-12-22 Sewing machine with a thread retractor
DE29922786U 1999-12-22
PCT/EP2000/013072 WO2001046508A1 (en) 1999-12-22 2000-12-21 Sewing machine with a thread withdrawing device

Publications (2)

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EP1155181A1 true EP1155181A1 (en) 2001-11-21
EP1155181B1 EP1155181B1 (en) 2003-05-14

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EP00991240A Expired - Lifetime EP1155181B1 (en) 1999-12-22 2000-12-21 Sewing machine with a thread withdrawing device

Country Status (6)

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US (1) US6422164B1 (en)
EP (1) EP1155181B1 (en)
JP (1) JP2003517909A (en)
CA (1) CA2363122C (en)
DE (2) DE29922786U1 (en)
WO (1) WO2001046508A1 (en)

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JP4094867B2 (en) * 2002-02-20 2008-06-04 Ｊｕｋｉ株式会社 sewing machine
SE528712C2 (en) * 2005-06-01 2007-01-30 Vsm Group Ab Sewing machine comprising thread feeder for feeding predetermined upper thread to the needle and method of such sewing machine
IT1396822B1 (en) * 2009-11-11 2012-12-14 Chee Siang Ind Co Ltd FILTERHIP DEVICE AGENT TO START THE SEWING PROCESS FOR A SEWING MACHINE WITH THE POSSIBILITY OF AUTOMATIC WIRE CUTTING.
DE102010003180B3 (en) * 2010-03-23 2011-07-28 RSG Rombold System GmbH & Co. KG, 71642 Device for providing a sewing thread
CN102912567B (en) * 2012-10-17 2014-04-16 丁立明 Cross-stitch embroidery machine
CN108505234A (en) * 2018-06-16 2018-09-07 无锡品益缝纫机有限公司 A kind of sewing machine take-up structure

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DE7501449U (en) * 1974-01-21 1975-07-24 The Singer Co sewing machine
US3901171A (en) * 1974-08-05 1975-08-26 Clinton Ind Thread wiper
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Also Published As

Publication number Publication date
DE29922786U1 (en) 2000-03-23
US6422164B1 (en) 2002-07-23
WO2001046508A1 (en) 2001-06-28
CA2363122A1 (en) 2001-06-28
DE50002171D1 (en) 2003-06-18
CA2363122C (en) 2008-07-15
EP1155181B1 (en) 2003-05-14
JP2003517909A (en) 2003-06-03

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