EP2182102A1 - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
EP2182102A1
EP2182102A1 EP09012000A EP09012000A EP2182102A1 EP 2182102 A1 EP2182102 A1 EP 2182102A1 EP 09012000 A EP09012000 A EP 09012000A EP 09012000 A EP09012000 A EP 09012000A EP 2182102 A1 EP2182102 A1 EP 2182102A1
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EP
European Patent Office
Prior art keywords
arm
needle bar
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.)
Granted
Application number
EP09012000A
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German (de)
French (fr)
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EP2182102B1 (en
Inventor
Artur Hinkelmann
Christoph Heckner
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Duerkopp Adler AG
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Duerkopp Adler AG
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Publication of EP2182102A1 publication Critical patent/EP2182102A1/en
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Classifications

    • 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
    • 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
    • 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 sewing material and transports it together with the sub-conveyor 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.

Abstract

The machine has a stand (3) connecting a base plate with an upper arm. An arm shaft is mounted in the arm. Grippers e.g. backstitch grippers, are mounted in the base plate. A main-drive motor (7) drives the arm shaft and the grippers. Thread levers (16, 17) are connected with needle bars (12). A material pressure rod (36) and a presser-foot (38) stay in drive connection with the arm shaft. A controllable needle bar-drive motor (18) is designed as a servomotor and stays in drive connection with the needle bars and the thread levers independent of the arm shaft.

Description

Die Erfindung betrifft eine Nähmaschine

  • mit einer unteren gehäuseartigen Grundplatte,
  • mit einem oberen Arm,
  • mit einem die Grundplatte mit dem Arm verbindenden Ständer,
  • mit einer im Arm gelagerten Armwelle,
  • mit einem in der Grundplatte gelagerten Greifer,
  • mit einem Haupt-Antriebs-Motor zum Antrieb der Armwelle und des Greifers,
  • mit mindestens einer antreibbaren Nadelstange,
  • mit einem mit der Nadelstange verbundenen Fadenhebel,
  • mit einem Stoffdrücker, der mit der Armwelle in Antriebsverbindung steht und
  • mit einer Nähgut-Transport-Einrichtung.
The invention relates to a sewing machine
  • with a lower box-like base plate,
  • with an upper arm,
  • with a stand connecting the base plate to the arm,
  • with an arm shaft mounted in the arm,
  • with a gripper mounted in the base plate,
  • with a main drive motor for driving the arm shaft and the gripper,
  • with at least one drivable needle bar,
  • with a thread lever connected to the needle bar,
  • with a presser foot, which is in drive connection with the arm shaft and
  • with a fabric transport facility.

Bei derartigen in der Praxis üblichen und verbreiteten Einnadel- oder Zweinadel-Nähmaschinen werden auch die mindestens eine Nadelstange von der Armwelle über jeweils einen Kurbeltrieb angetrieben. Eine Optimierung der Einstichzeit der Nadel in das Nähgut in Bezug auf die Stellung zur Greiferspitze und eine Optimierung der Nadelfadenspannung mittels des Fadenhebels ist hierbei nicht möglich.In such customary in practice and common single-needle or two-needle sewing machines and the at least one needle bar are driven by the arm shaft via a respective crank mechanism. An optimization of the puncture time of the needle in the fabric in relation to the position to the hook tip and an optimization of the needle thread tension by means of the thread lever is not possible here.

Der Erfindung liegt die Aufgabe zugrunde, eine Nähmaschine der gattungsgemäßen Art so auszugestalten, dass eine Optimierung der Bewegung der Nadel und der Fadenspannung über einen Bewegungszyklus der mindestens einen Nadelstange mit Nadel möglich ist.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.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass mindestens ein steuerbarer als Servomotor ausgebildeter Nadelstangen-Antriebs-Motor vorgesehen ist, der mit der mindestens einen Nadelstange und dem mit ihr verbundenen Fadenhebel in einer von der Armwelle unabhängigen Antriebsverbindung steht.This object is achieved according to the invention in that 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.

Durch die Abkopplung des Antriebs der mindestens einen Nadelstange und des jeweiligen Fadenhebels von der Armwelle und durch den jeweils eigenständigen Antrieb der Nadelstange mit Fadenhebel durch einen eigenen steuerbaren Nadelstangen-Antriebs-Motor wird ermöglicht, die Nadelstangenbewegung über einen vollen Bewegungszyklus, der normalerweise einer Umdrehung der Armwelle entspricht, in einer Weise zu gestalten, dass eine Optimierung der Stichbildung erfolgt. Beispielsweise kann die Bewegung der Nadel mit dem Nadelfaden exakt so gesteuert werden, dass die Nadel solange in das Nähgut eingestochen bleibt, bis die Nadelfadenschlinge von der Greiferspitze aufgenommen wird. Umgekehrt kann anschließend die Bewegung der Nadelstange mit Nadel und des zugehörigen Fadenhebels aus der unteren Einstichstellung nach oben so beschleunigt erfolgen, dass der Nadelfaden sehr schnell angezogen wird, wodurch die Stichbildung verbessert wird. Andererseits können die Nadelstangen so angetrieben werden, dass unterschiedlich lange Stiche gebildet werden, was bei Ziernähten erwünscht sein kann. Die jeweilige Stichlänge ist hierbei ein ganzzahliges Vielfaches der einzelnen Transportschritte, was insbesondere bei verhältnismäßig langsam laufenden Nähmaschinen ohne weiteres realisierbar ist. Auch beim Beginn einer Naht können Vorteile erreicht werden. Hierbei kann die Steuerung so programmiert werden, dass die Nadelstange und der Fadenhebel nicht bis zum oberen Totpunkt bewegt werden, sondern vorher angehalten werden. Für die nächste Stichbildung läuft der Antrieb der Nadelstange und damit des Fadenhebels rückwärts. So ist es möglich, bei den ersten Stichen einer Nadel weniger Nadelfaden wegzuziehen und damit den Nahtanfang zu verbessern. Die vorstehend entsprechend geschilderten Maßnahmen können durch entsprechende Programmierung der Steuerung erreicht werden. Die Einstichkräfte können ebenfalls programmiert werden. Basis hierfür ist aber die geschilderte Trennung von Nadelstangen-Antrieb und Fadenhebel-Antrieb von der Armwelle und damit vom alternierenden Obertransport.By decoupling the drive of the at least one needle bar and the respective thread lever of the arm shaft and the respective independent drive of the needle bar with thread lever by a separate controllable needle bar drive motor is allowed to move the needle bar over a full cycle of movement, usually one revolution of the Arm shaft corresponds to make in such a way that an optimization of the stitch formation takes place. For example, the movement of the needle with the needle thread can be controlled exactly so that the needle remains inserted into the material until the needle thread loop is picked up by the hook tip. Conversely, then the movement of the needle bar with needle and the associated thread lever from the lower puncture position can be accelerated upwards so that the needle thread is attracted very quickly, whereby the stitch formation is improved. On the other hand, 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. Even at the beginning of a seam benefits can be achieved. Here, 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.

Besonders vorteilhaft sind die erfindungsgemäßen Maßnahmen bei Zweinadel-Nähmaschinen. Hierbei kann durch Abschalten eines Antriebsmotors eine Nadelstange mit Fadenhebel abgeschaltet werden. Es erfolgt deshalb in diesem Fall kein störendes Fadenvorziehen beim Nadelstillstand.The measures according to the invention are particularly advantageous in two-needle sewing machines. In this case, 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.

Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.Advantageous embodiments emerge from the subclaims.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels der Erfindung anhand der Zeichnung. Es zeigt:

Fig. 1
einen vertikalen Längsschnitt durch eine Nähmaschine nach der Erfindung entsprechend der Schnittlinie I-I in Fig. 2,
Fig. 2
eine Stirnansicht der Nähmaschine gemäß dem Sichtpfeil II in Fig. 1 mit abgenommenem stirnseitigen Deckel,
Fig. 3
einen vertikalen Querschnitt durch die Nähmaschine,
Fig. 4
einen vertikalen Teil-Längsschnitt durch die Nähmaschine gemäß der Schnittlinie IV-IV in Fig. 2 und
Fig. 5
eine Stirnansicht der Nähmaschine gemäß dem Sichtpfeil V in Fig. 1.
Further advantages and features of the invention will become apparent from the following description of an embodiment of the invention with reference to the drawing. It shows:
Fig. 1
a vertical longitudinal section through a sewing machine according to the invention according to the section line II in Fig. 2 .
Fig. 2
an end view of the sewing machine according to the viewing arrow II in Fig. 1 with removed frontal lid,
Fig. 3
a vertical cross section through the sewing machine,
Fig. 4
a vertical partial longitudinal section through the sewing machine according to the section line IV-IV in Fig. 2 and
Fig. 5
an end view of the sewing machine according to the viewing arrow V in Fig. 1 ,

Bei der in der Zeichnung dargestellten Nähmaschine handelt es sich um eine Zweinadel-Steppstich-Nähmaschine. Sie weist in der üblichen Weise einen oberen Arm 1, eine gehäuseartige untere Grundplatte 2 und einen den Arm 1 und die Grundplatte 2 zu einer C-Form verbindenden vertikalen Ständer 3 auf. Im Arm 1 ist eine Armwelle 4 angeordnet. In der Grundplatte 2 ist eine Unterwelle 5 drehbar gelagert, die mit der Armwelle 4 mittels eines Zahnriemen-Triebs 6 mit einem Übersetzungsverhältnis 1:1 gekoppelt ist. An der Grundplatte 2 ist weiterhin ein Haupt-Antriebs-Motor 7 angebracht, der mit der Unterwelle 5 mittels eines Zahnriemen-Triebs 8 verbunden ist. Die Armwelle 4 und die Unterwelle 5 werden also vom Haupt-Antriebs-Motor 7 mit identischer Drehzahl angetrieben.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. In arm 1, an arm shaft 4 is arranged. In the base plate 2, 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. On the base plate 2, 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.

An dem außerhalb des Arms 1 befindlichen Ende der Armwelle 4 ist in üblicher Weise ein Handrad 9 angebracht. Benachbart zu dem Handrad 9 ist an der Armwelle 4 ein Positionsgeber 10 angebracht, der in üblicher Weise in gleichen Winkelabständen bei Umdrehungen der Armwelle 4 ein Signal abgibt, woraus jeweils in der zentralen Steuerung 11 die genaue Winkelposition der Armwelle 4 und damit auch der Unterwelle 5 ermittelt wird.At the located outside of the arm 1 end of the arm shaft 4, 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.

Im Arm 1 sind zwei Nadelstangen 12, 13, nämlich eine erste Nadelstange 12 und eine zweite Nadelstange 13 in einer x-y-z-Ebene nebeneinander angeordnet, wobei y die Längsrichtung der Nähmaschine, z die vertikale Bewegungsrichtung der Nadelstangen 12, 13 und x die Nährichtung definiert. Die Nadelstangen 12, 13 weisen in üblicher Weise Nadeln 12a, 13a zur Führung von nicht dargestellten Nadelfäden auf. Der Antrieb der Nadelstangen 12, 13 erfolgt über grundsätzlich bekannte Kurbeltriebe, nämlich einen ersten Kurbeltrieb 14 und einen zweiten Kurbeltrieb 15. Synchron zu der ersten und der zweiten Nadelstange 12, 13 werden ebenfalls ein erster Fadenhebel 16 bzw. ein zweiter Fadenhebel 17 angetrieben. Der Antrieb der Kurbeltriebe 14, 15 erfolgt nicht - wie üblich - mittels der Armwelle 4, sondern mittels voneinander unabhängiger Nadelstangen-Antriebs-Motoren 18, 19, nämlich eines ersten Nadelstangen-Antriebs-Motors 18 bzw. eines zweiten Nadelstangen-Antriebs-Motors 19. Bei diesen Motoren 18, 19 handelt es sich um mit der Steuerung 11 verbundene und über diese ansteuerbare Servomotoren, insbesondere Schrittmotoren. Der Antrieb des ersten Kurbeltriebs 14 und damit der ersten Nadelstange 12 vom ersten Motor 18 erfolgt über einen ersten Zahnriemen-Trieb 20 und eine hiervon angetriebene erste Kurbeltrieb-Welle 21, die in einem ersten Lager 22 am Arm 1 gelagert ist. Der zweite Kurbeltrieb 15 wird von dem zweiten Nadelstangen-Antriebs-Motor 19 mittels eines zweiten Zahnriemen-Triebs 23 über eine zweite Kurbeltrieb-Welle 24 angetrieben, die in einem zweiten Lager 25 im Arm 1 ortsfest, aber frei drehbar gelagert ist. Die Fadenhebel 16 bzw. 17 werden von den Kurbeltrieb-Wellen 21 bzw. 24 angetrieben.In the arm 1, 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 drive of the first crank mechanism 14 and thus of the first needle bar 12 from the first motor 18 via a first toothed belt drive 20 and a first driven crank shaft 21, which is mounted in a first bearing 22 on the arm 1. 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.

Von der Unterwelle 5 werden in der üblichen Weise über jeweils ein Winkel-Getriebe 26, 26a je ein Greifer 27, 27a angetrieben. Bei den Greifern 27, 27a handelt es sich um Steppstich-Greifer, die in üblicher Weise jeweils eine nicht dargestellte Spule mit einem Greiferfaden-Vorrat enthalten. Des Weiteren werden in der üblichen Weise von der Unterwelle 5 über eine Exzenter-Trieb-Anordnung 28 und eine Wellen-Anordnung 29 je ein neben dem Greifer 27 bzw. 27a befindlicher Unter-Transporteur 30 angetrieben, wovon nur ein Transporteur dargestellt ist. Dieser Unter-Transporteur 30 ist derart ausgebildet, dass die übliche Transportbewegung in der Nährichtung (x-Richtung) in angehobenem Zustand durchgeführt wird, während die Rückbewegung in abgesenktem Zustand erfolgt.From the lower shaft 5 are 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. Furthermore, depending on the sub-shaft 5 via an eccentric drive arrangement 28 and a shaft arrangement 29 each one next to the gripper 27 and 27a befindlicher 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.

Die Armwelle 4 endet - vom Handrad 9 aus gesehen - vor dem zweiten Kurbeltrieb 15 in der zweiten Kurbeltrieb-Welle 24 und ist dort in einem Armwellen-Lager 32 gelagert und über das Lager 25 gegenüber dem Arm 1 abgestützt. Mit der Armwelle 4 ist - benachbart zum Armwellen-Lager 32 - ein Exzenter-Getriebe 33 für einen alternierenden Obertransport verbunden, der eine Schwing-Welle 34 antreibt, die wiederum über einen Schwinghebel-Trieb 35 eine Stoff-Drücker-Stange 36 und eine Obertransport-Stange 37 im Wechsel antreibt. Wenn der an der Stoff-Drücker-Stange 36 angebrachte Drückerfuß 38 auf der Grundplatte 2 oberhalb des Greifers 27 befindliches Nähgut auf die Stichplatte 39 drückt, wird die Obertransport-Stange 37 mit ihrem Transportfuß 40 vom Nähgut abgehoben. Wenn dagegen nach einem Stich der Drücker-Fuß 38 abgehoben wird, dann wird der an der Obertransport-Stange 37 befindliche Transportfuß 40 auf das Nähgut abgesenkt und transportiert dieses zusammen mit dem Unter-Transporteur 30 in der Nährichtung x. Das Exzenter-Getriebe 33 mit der Schwing-Welle 34 und dem die Schwing-Welle 34 mit den Stangen 36, 37 verbindenden Schwinghebel-Trieb 35 bilden also ein sogenanntes Hüpfer-Getriebe.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. Connected to the arm shaft 4 - adjacent to the arm shaft bearing 32 - is an eccentric transmission 33 for an alternating top feed which drives 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. When 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. If, on the other hand, the pusher foot 38 is lifted off after a pass, then the transport foot 40 located on the top transport bar 37 is lowered onto the sewing material and transports it together with the sub-conveyor 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.

Die Steuerung 11 ist programmierbar. Sie ist mit dem Haupt-Antriebs-Motor 7, den Nadelstangen-Antriebs-Motoren 18, 19 und dem Positionsgeber 10 gekoppelt sind. Über sie sind die eingangs geschilderten unterschiedlichen Funktionen ansteuerbar.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.

Claims (5)

Nähmaschine - mit einer unteren gehäuseartigen Grundplatte (2), - mit einem oberen Arm (1), - mit einem die Grundplatte (2) mit dem Arm (1) verbindenden Ständer (3), - mit einer im Arm (1) gelagerten Armwelle (4), - mit einem in der Grundplatte (2) gelagerten Greifer (27, 27a), - mit einem Haupt-Antriebs-Motor (7) zum Antrieb der Armwelle (4) und des Greifers (27), - mit mindestens einer antreibbaren Nadelstange (12, 13), - mit einem mit der Nadelstange (12, 13) verbundenen Fadenhebel (16, 17), - mit einem Stoffdrücker (36, 38'), der mit der Armwelle (4) in Antriebsverbindung steht und - mit einer Nähgut-Transport-Einrichtung, dadurch gekennzeichnet,
dass mindestens ein steuerbarer als Servomotor ausgebildeter Nadelstangen-Antriebs-Motor (18, 19) vorgesehen ist, der mit der mindestens einen Nadelstange (12, 13) und dem mit ihr verbundenen Fadenhebel (16, 17) in einer von der Armwelle (4) unabhängigen Antriebsverbindung steht.sewing machine - With a lower box-like base plate (2), with an upper arm (1), - with a base plate (2) with the arm (1) connecting stand (3), with an arm shaft (4) mounted in the arm (1), with a gripper (27, 27a) mounted in the base plate (2), - With a main drive motor (7) for driving the arm shaft (4) and the gripper (27), - With at least one drivable needle bar (12, 13), with a thread lever (16, 17) connected to the needle bar (12, 13), - With a presser foot (36, 38 '), which is in drive connection with the arm shaft (4) and with a fabric transport device, characterized,
in that at least one controllable needle bar drive motor (18, 19) designed as a servomotor is provided, which is connected to the at least one needle bar (12, 13) and the thread lever (16, 17) connected to it in one of the arm shaft (4). independent drive connection stands. Nähmaschine nach Anspruch 1, dadurch gekennzeichnet,
dass eine erste Nadelstange (12) über einen ersten Kurbeltrieb (14) und ein erster Fadenhebel (16) jeweils mittels einer ersten Kurbeltrieb-Welle (21) mit einem ersten Nadelstangen-Antriebs-Motor (18) verbunden sind und
dass eine zweite Nadelstange (13) über einen zweiten Kurbeltrieb (15) und ein zweiter Fadenhebel (17) jeweils mittels einer zweiten Kurbeltrieb-Welle (24) mit einem zweiten Nadelstangen-Antriebs-Motor (19) verbunden sind.Sewing machine according to claim 1, characterized
that a first needle bar (12) via a first crank mechanism (14) and a first thread lever (16) each by means of a first crank drive shaft (21) with a first needle bar drive motor (18) are connected and
that a second needle bar (13) through a second crank drive (15) and a second thread lever (17) respectively by means of a second crank-shaft (24) with a second needle bar drive motor (19) are connected. Nähmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet,
dass ein die Drehzahl der Armwelle (4) und des Greifers (27) erfassender Positionsgeber (10) vorgesehen ist und
dass der Haupt-Antriebs-Motor (7), der mindestens eine Nadelstangen-Antriebs-Motor (18, 19) und der Positionsgeber (10) mit einer gemeinsamen Steuerung (11) verbunden sind.Sewing machine according to claim 1 or 2, characterized
that a speed sensor of the arm shaft (4) and the gripper (27) detecting position sensor (10) is provided and
in that the main drive motor (7), the at least one needle bar drive motor (18, 19) and the position transmitter (10) are connected to a common control (11). Zweinadel-Nähmaschine nach Anspruch 1, dadurch gekennzeichnet,
dass ein Ober-Transporteur (37, 40) vorgesehen ist, der mit der Armwelle (4) in Antriebsverbindung steht.Two-needle sewing machine according to claim 1, characterized in that
in that an upper feed dog (37, 40) is provided which is in drive connection with the arm shaft (4). Zweinadel-Nähmaschine nach Anspruch 4, dadurch gekennzeichnet,
dass der Stoffdrücker (36, 38) und der Ober-Transporteur (37, 40) über ein Exzenter-Getriebe (33) mit der Armwelle (4) verbunden sind.Two-needle sewing machine according to claim 4, characterized in that
in that the presser foot (36, 38) and the top feed dog (37, 40) are connected to the arm shaft (4) via an eccentric gear (33).
EP09012000A 2008-10-29 2009-09-22 Sewing machine Active EP2182102B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008053750A DE102008053750A1 (en) 2008-10-29 2008-10-29 sewing machine

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EP2182102A1 true EP2182102A1 (en) 2010-05-05
EP2182102B1 EP2182102B1 (en) 2011-06-08

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EP (1) EP2182102B1 (en)
JP (1) JP5514510B2 (en)
KR (1) KR101537823B1 (en)
CN (1) CN101724993B (en)
AT (1) ATE512245T1 (en)
DE (1) DE102008053750A1 (en)

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CN104928860A (en) * 2015-06-11 2015-09-23 张文勇 Chain type sewing machine special for knitted hat
CN108360159A (en) * 2016-04-15 2018-08-03 黄广建 Compress driving mechanism, cloth-pressing device and the sewing machine of unobstructed smoothly sewing machine
US11326288B2 (en) * 2019-09-25 2022-05-10 Zhejiang Hehe Electric Machinery Co., Ltd Independent presser foot drive mechanism and embroidery machine

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CN106835523A (en) * 2017-03-10 2017-06-13 陈志锋 A kind of wire picking device

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GB471276A (en) 1936-05-11 1937-09-01 Singer Mfg Co Improvements in or relating to sewing machines
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CN104928860A (en) * 2015-06-11 2015-09-23 张文勇 Chain type sewing machine special for knitted hat
CN108360159A (en) * 2016-04-15 2018-08-03 黄广建 Compress driving mechanism, cloth-pressing device and the sewing machine of unobstructed smoothly sewing machine
CN108360159B (en) * 2016-04-15 2020-08-25 黄广建 Smooth cloth pressing driving mechanism of sewing machine, cloth pressing device and sewing machine
US11326288B2 (en) * 2019-09-25 2022-05-10 Zhejiang Hehe Electric Machinery Co., Ltd Independent presser foot drive mechanism and embroidery machine

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JP5514510B2 (en) 2014-06-04
DE102008053750A1 (en) 2010-05-06
KR101537823B1 (en) 2015-07-17
ATE512245T1 (en) 2011-06-15
KR20100047805A (en) 2010-05-10
CN101724993A (en) 2010-06-09
EP2182102B1 (en) 2011-06-08
JP2010104780A (en) 2010-05-13
CN101724993B (en) 2013-02-13

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