EP2138619B1 - Transporter for transporting sewing material while operating a sewing machine - Google Patents

Transporter for transporting sewing material while operating a sewing machine Download PDF

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Publication number
EP2138619B1
EP2138619B1 EP09006768A EP09006768A EP2138619B1 EP 2138619 B1 EP2138619 B1 EP 2138619B1 EP 09006768 A EP09006768 A EP 09006768A EP 09006768 A EP09006768 A EP 09006768A EP 2138619 B1 EP2138619 B1 EP 2138619B1
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EP
European Patent Office
Prior art keywords
transporter
needle
wall
section
sewing
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
EP09006768A
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German (de)
French (fr)
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EP2138619A1 (en
Inventor
Christoph Heckner
Gerd Langreck
Dorjan Krljar
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Duerkopp Adler AG
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Duerkopp Adler AG
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Publication of EP2138619A1 publication Critical patent/EP2138619A1/en
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Publication of EP2138619B1 publication Critical patent/EP2138619B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means

Definitions

  • the invention relates to a conveyor for transporting sewing material during the operation of a sewing machine according to the preamble of claim 1. Furthermore, the invention relates to a sewing machine with such a conveyor.
  • Such a carrier is among others from the JP 2004/174120 A known.
  • a fabric feeder with two sliders known between which a stitch hole is limited to a sewing needle.
  • An adjustment device with a bridge in the form of a cam member connects the two feed valves such that a distance between them is adjustable.
  • the GB 209,039 shows cloth slide mechanisms for sewing machines.
  • an adjustable conveyor wall provides the ability to effectively secure the sewing needle in operation on the side facing away from the stitch forming tool, which interacts with the needle when sewing with the needle, against an undesirable deflection, for example by heavy material.
  • the conveyor wall can be adjusted so that even small deflections of the sewing needle in the direction of the feed dog wall caused that the feed dog wall supports the sewing needle and thus prevents breakage or bending of the sewing needle.
  • the sewing machine can be a single-needle machine or a two-needle machine.
  • two conveyor walls can be provided which, when the feed dog of the two-needle machine is mounted, are respectively arranged opposite an associated embroidery-forming tool, for example a gripper, facing away from it.
  • an associated embroidery-forming tool for example a gripper
  • two conveyor walls can be provided in the execution as a two-needle machine and a common conveyor wall, which is formed on both sides for supporting one of the two needles of the two-needle machine.
  • a continuous adjustability of the distance of claim 2 leads to the possibility of a particularly fine and thus accurate specification of the distance of the conveyor wall to the needle movement range.
  • an adjustability of the distance via one or more stages is possible.
  • An adjustment device according to claim 3 can be realized with low production costs.
  • a weakening section according to claim 4 represents a solid-state joint for the defined deflection of the conveyor wall for setting this.
  • a reduction in the thickness of the wall thickness in the weakening section according to claim 5 has been found to be particularly suitable for producing an elastic displacement of the conveyor wall for setting of this.
  • the passage grooves are designed in particular as blind grooves, so that despite the passage grooves, the conveyor wall is integrally connected to the adjacent portions of the body.
  • An improved deflectability of the conveyor wall is particularly valid for an embodiment of the adjusting device according to claim 7.
  • An embodiment of the adjusting device according to claim 8 allows easy adjustment.
  • An embodiment of the carrier-fixed adjusting section according to claim 9 is particularly stable.
  • the carrier-fixed adjustment section is not a separate component from the feed dog.
  • the adjustment section can be an integral part of the basic body.
  • a mobility of the carrier-fixed adjustment section to the conveyor wall can then be achieved via a solid-state joint.
  • the solid-state joint can be designed as a weakening section in the transition region between the conveyor wall and a carrier base body be.
  • a multi-part embodiment of the transporter is possible in which, for example, the adjustment section represents a part detachable from the other transporter.
  • an embodiment of the adjustment section as a pivoting element, which is connected via a pivot joint with the main body of the conveyor, is possible.
  • a sewing machine 1 has a base plate 2 with a stand 3 extending upwardly therefrom and an angled arm 4. The latter ends in a head 5.
  • an arm shaft 6 is rotatably mounted, which drives a crank mechanism 7 with a thread lever 8 in the head 5.
  • the crank drive 7 is drivingly connected to a displaceably mounted in the head 5 needle bar 9 in conjunction.
  • the latter has a sewing needle 10 at its lower end.
  • the sewing needle 10 can be moved up and down by the crank mechanism 7.
  • the sewing needle 10 passes through a needle movement range, which will be explained below.
  • the sewing needle 10 leads in an eye from a spool 12 via a thread tensioning device and the thread lever 8 supplied needle thread 13th
  • a support or throat plate 14 is mounted, on which a workpiece 15 rests.
  • the support plate 14 has a feed slide opening or throat plate recess 16, which is designed for the passage of a feed dog or feed dog 17.
  • the feed dog 17 has a tap hole 18 for the passage of the needle 10.
  • the feed dog 17 is driven via a thrust and lifting gear driven below the base plate 2.
  • a gripper 19 is arranged, which has a gripper body 20 with a gripper tip 21.
  • the latter is firmly connected to a shaft which has a vertical axis of rotation 22 extending parallel to the needle bar 9.
  • This shaft is rotatably mounted in a bearing block 23 screwed to the base plate 2.
  • a drive shaft 24 is also mounted, which is connected to a arranged in the interior of the bearing block 23 gear transmission.
  • the drive shaft 24 is drivingly connected to the arm shaft 6 via a belt drive 25.
  • Fig. 2 shows the stitching area of the sewing machine 1 more in detail. Shown is the situation after the sewing needle 10 is withdrawn from the tap hole 18 out again towards the top dead center. The needle thread 13 forms below the stitch hole 18 a needle thread loop 26, which is knotted in the subsequent knotting with a lower thread 27. The latter is fed to the stitch formation area of a coil or thread winding housing housed in the gripper body 20. In Fig. 2 a direction of sewing is indicated by a directional arrow N.
  • Fig. 3 to 6 show the conveyor 17 in detail.
  • This has an upper transport section 28 with a both sides of the stitch hole 18 sawtooth running surface for frictional engagement with the fabric 15.
  • the transport section 28 leads in the cloth slide opening 16, ie in the throat plate recess, a transport movement, controlled by the push and screw gear out. Since the transporting portion 28 annularly surrounds the stitch hole 18, the transporting portion 28 is the needle moving portion 29, which in the Fig. 6 indicated by dashed lines, adjacent.
  • a main body 30 of the transport section 28 is fixedly connected to a feed carrier in the form of a support beam 31, which in turn is part of the thrust and lifting gear for the conveyor 17.
  • a conveyor wall 32 is disposed below the transport section 28 adjacent to the needle-moving area 29.
  • the conveyor wall 32 runs at mounted transporter 17 (see. Fig. 2 ) on that side of the needle 10, which faces away from a stitch forming tool, which cooperates with the needle 10 during sewing, that is from the gripper tip 21 of the gripper 19.
  • the needle 10 is thus in the bottom dead center between the conveyor wall 32 and an optional needle guard plate of the gripper 19th
  • the distance A (see. Fig. 6 ) of the conveyor wall 32 to the needle movement area 29 is adjustable via an adjusting device 33.
  • the latter is listed for continuous adjustment of the distance A.
  • the adjusting device 33 has a carrier-fixed adjusting portion 34. This is formed as mounted transporter 17 horizontally extending web which is integrally connected to the main body 30 of the conveyor 17. Furthermore, the adjusting device 33 has an adjusting body 35 in the form of a hexagon socket screw, which serves as a set screw.
  • the adjusting body 35 is screwed into a complementary internal thread 36 of the carrier-fixed adjustment section 34. With a free end 37, the adjusting body 35 is supported against the side facing away from the needle-movement region 29 side of the conveyor wall 32 from.
  • the adjusting body 35 is supported against the carrier-fixed adjustment section 34 on the one hand and against the conveyor wall 32 on the other hand with adjustable force.
  • the conveyor wall 32 has between a support portion 38, on which the adjusting body 35 is supported, and a transition portion 39 (see FIG. Fig. 6 ) towards the transport section 28 a weakening section 40 with reduced wall thickness.
  • the wall thickness of the conveyor wall 32 is approximately halved.
  • the conveyor wall 32 is of adjacent sections 41 via passageways 42 (see FIG. Fig. 4 ) separated.
  • the adjusting body 35 is supported on the conveyor wall 32 on the support section 38, ie at the free end of the conveyor wall 32, between the two passage grooves 42.
  • the needle 10 should be deflected away from the gripper 19, for example when piercing heavy materials such as leather, this undesired displacement movement of the needle 10 is prevented by abutment of the needle 10 on the adjusted transporter wall 32.
  • the conveyor wall 32 thus acts as a counter support for the needle 10 in the opposite direction to the supporting action of an optionally present needle guard plate of the gripper 19.
  • the set feed dog wall 32 ensures that the needle thread loop 26, which in the loop stroke position, in the Fig. 2 is shown, is formed, not undesirable from the gripper 19 can dodge away, since this evasive movement is prevented by the feed dog wall 32.
  • the conveyor wall 32 can be finely adjusted via the adjusting body 35 in a simple manner.

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

Abstract

The feeder or feed dog (17) has a transport section (28) provided for implementation of a transport movement in a recess of a needle plate. The transport section is provided adjacent to a needle-movement area. A base plate (30) is provided for connecting the transport section with a feeder-carrier i.e. supporting bar. A feeder wall (32) is arranged under the transport section adjacent to the area. The wall is designed such that the wall runs on a side of a sewing needle, during mounting of the feeder. The needle is turned away from a gripper, which co-acts with the needle during sewing. An independent claim is also included for a sewing machine with a needle bar.

Description

Die Erfindung betrifft einen Transporteur zum Transport von Nähgut während des Betriebs einer Nähmaschine nach dem Oberbegriff des Anspruchs 1. Ferner betrifft die Erfindung eine Nähmaschine mit einem derartigen Transporteur.The invention relates to a conveyor for transporting sewing material during the operation of a sewing machine according to the preamble of claim 1. Furthermore, the invention relates to a sewing machine with such a conveyor.

Ein derartiger Transporteur ist unter anderem aus der JP 2004/174120 A bekannt. Aus der DE 100 02 456 A1 ist eine Stoffvorschubvorrichtung mit zwei Stoffschiebern bekannt, zwischen denen ein Stichloch für eine Nähnadel begrenzt ist. Eine Einstelleinrichtung mit einer Brücke in Form eines Nockengliedes verbindet die beiden Stoffschieber derart, dass ein Abstand zwischen diesen einstellbar ist. Die GB 209,039 zeigt Stoffschiebermechanismen für Nähmaschinen.Such a carrier is among others from the JP 2004/174120 A known. From the DE 100 02 456 A1 is a fabric feeder with two sliders known between which a stitch hole is limited to a sewing needle. An adjustment device with a bridge in the form of a cam member connects the two feed valves such that a distance between them is adjustable. The GB 209,039 shows cloth slide mechanisms for sewing machines.

Beim Betrieb einer Nähmaschine kann es insbesondere dann, wenn schwere Materialien wie beispielsweise Leder verarbeitet werden, zu Verformungen der Nähnadel bis hin zum Bruch der Nähnadel kommen. Zudem kommt es bei durch Nähgut verursachtere Verformung der Nähnadel vor, dass Fehlstiche erzeugt werden, da eine Schlinge des von der Nähnadel geführten Oberfadens vom hiermit zusammenwirkenden Stichbildungswerkzeug nicht korrekt ergriffen wird.When operating a sewing machine, it can, in particular when heavy materials such as leather are processed, come to deformations of the sewing needle to break the sewing needle. In addition, when caused by sewing material deformation of the sewing needle before that skip stitches are generated because a loop of the guided from the sewing needle upper thread is not taken correctly by the hereby cooperating stitch forming tool.

Es ist eine Aufgabe der vorliegenden Erfindung, einen Transporteur der eingangs genannten Art derart weiterzubilden, dass die Wahrscheinlichkeit eines Nadelbruchs und/oder eines Fehlstichs verringert ist.It is an object of the present invention to develop a conveyor of the type mentioned in such a way that the likelihood of needle breakage and / or a missed stitch is reduced.

Diese Aufgabe ist erfindungsgemäß gelöst durch einen Transporteur mit den im Anspruch 1 angegebenen Merkmalen.This object is achieved by a conveyor with the features specified in claim 1.

Erfindungsgemäß wurde erkannt, dass eine einstellbare Transporteurwand die Möglichkeit liefert, die Nähnadel im Betrieb auf der Seite, die vom Stichbildungswerkzeug, das beim Nähen mit der Nadel zusammenwirkt, abgewandt ist, wirkungsvoll gegen eine unerwünschte Auslenkung, beispielsweise durch schweres Nähgut, zu sichern. Die Transporteurwand kann so eingestellt werden, dass bereits geringe Auslenkungen der Nähnadel in Richtung auf die Transporteurwand dazu führten, dass die Transporteurwand die Nähnadel abstützt und damit einen Bruch oder ein Verbiegen der Nähnadel verhindert. Zudem ist durch die einstellbare Transporteurwand gewährleistet, dass eine Fadenschlinge bzw. -schlaufe nicht unerwünscht auf die vom mit der Nadel zusammenwirkenden Stichbildungswerkzeug abgewandte Seite ausweicht. Die Fadenschlinge kann dann sicher vom Stichbildungswerkzeug ergriffen werden. Bei der Nähmaschine kann es sich um eine Einnadel- oder um eine Zweinadelmaschine handeln. Bei der Ausführung der Nähmaschine als Zweinadelmaschine können zwei Transporteurwände vorgesehen sein, die bei montiertem Transporteur der Zweinadelmaschine jeweils einem zugeordneten Stickbildungswerkzeug, beispielsweise einem Greifer, gegenüberliegend, also von diesem abgewandt, angeordnet sind. Anstelle von zwei Transporteurwänden kann bei der Ausführung als Zweinadelmaschine auch eine gemeinsame Transporteurwand vorgesehen sein, die beiderseits zum Abstützen jeweils einer der beiden Nadeln der Zweinadelmaschine ausgebildet ist.According to the invention it has been recognized that an adjustable conveyor wall provides the ability to effectively secure the sewing needle in operation on the side facing away from the stitch forming tool, which interacts with the needle when sewing with the needle, against an undesirable deflection, for example by heavy material. The conveyor wall can be adjusted so that even small deflections of the sewing needle in the direction of the feed dog wall caused that the feed dog wall supports the sewing needle and thus prevents breakage or bending of the sewing needle. In addition, it is ensured by the adjustable conveyor wall that a thread loop or loop is not undesirable on the side facing away from the needle forming tool cooperating with the side avoids. The suture loop can then be securely grasped by the stitch forming tool. The sewing machine can be a single-needle machine or a two-needle machine. When the sewing machine is designed as a two-needle machine, two conveyor walls can be provided which, when the feed dog of the two-needle machine is mounted, are respectively arranged opposite an associated embroidery-forming tool, for example a gripper, facing away from it. Instead of two conveyor walls can be provided in the execution as a two-needle machine and a common conveyor wall, which is formed on both sides for supporting one of the two needles of the two-needle machine.

Eine kontinuierliche Einstellbarkeit des Abstand des nach Anspruch 2 führt zur Möglichkeit einer besonders feinen und damit genauen Vorgabe des Abstandes der Transporteurwand zum Nadel-Bewegungsbereich. Alternativ ist auch eine Einstellbarkeit des Abstands über eine oder mehrere Stufen möglich.A continuous adjustability of the distance of claim 2 leads to the possibility of a particularly fine and thus accurate specification of the distance of the conveyor wall to the needle movement range. Alternatively, an adjustability of the distance via one or more stages is possible.

Eine Einstelleinrichtung nach Anspruch 3 lässt sich mit geringen Herstellungskosten realisieren.An adjustment device according to claim 3 can be realized with low production costs.

Ein Schwächungsabschnitt nach Anspruch 4 stellt ein Festkörpergelenk zur definierten Auslenkung der Transporteurwand zum Einstellen von dieser dar.A weakening section according to claim 4 represents a solid-state joint for the defined deflection of the conveyor wall for setting this.

Eine Stärkenverringerung der Wandstärke im Schwächungsabschnitt nach Anspruch 5 hat sich als besonders geeignet zur Erzeugung einer elastischen Verlagerung der Transporteurwand zur Einstellung von dieser herausgestellt.A reduction in the thickness of the wall thickness in the weakening section according to claim 5 has been found to be particularly suitable for producing an elastic displacement of the conveyor wall for setting of this.

Durchgangsnuten nach Anspruch 6 verbessern die Auslenkbarkeit der Transporteurwand beim Einstellen von dieser. Die Durchgangsnuten sind insbesondere als Sacknuten ausgeführt, so dass trotz der Durchgangsnuten die Transporteurwand einstückig mit den benachbarten Abschnitten des Grundkörpers verbunden ist.Durchgangsnuten according to claim 6 improve the deflectability of the conveyor wall when setting this. The passage grooves are designed in particular as blind grooves, so that despite the passage grooves, the conveyor wall is integrally connected to the adjacent portions of the body.

Eine verbesserte Auslenkbarkeit der Transporteurwand gilt besonders für eine Ausführung der Einstelleinrichtung nach Anspruch 7.An improved deflectability of the conveyor wall is particularly valid for an embodiment of the adjusting device according to claim 7.

Eine Ausführung der Einstelleinrichtung nach Anspruch 8 erlaubt eine einfache Einstellung.An embodiment of the adjusting device according to claim 8 allows easy adjustment.

Eine Ausführung des trägerfesten Einstellabschnitts nach Anspruch 9 ist besonders stabil. Bei dieser Ausgestaltung ist der trägerfeste Einstellabschnitt kein vom Transporteur separates Bauteil. Bei dem Einstellabschnitt kann es sich um einen integralen Bestandteil des Grundkörpers handeln. Eine Beweglichkeit des trägerfesten Einstellabschnitts zur Transporteurwand kann dann über ein Festkörpergelenk erreicht werden. Das Festkörpergelenk kann als Schwächungsabschnitt im Übergangsbereich zwischen der Transporteurwand und einem Transporteur-Grundkörper ausgebildet sein. Prinzipiell ist auch eine mehrteilige Ausführung des Transporteurs möglich, bei der beispielsweise der Einstellabschnitt ein vom sonstigen Transporteur lösbares Teil darstellt. Auch eine Ausführung des Einstellabschnitts als Schwenkelement, das über ein Schwenkgelenk mit dem Grundkörper des Transporteurs verbunden ist, ist möglich.An embodiment of the carrier-fixed adjusting section according to claim 9 is particularly stable. In this embodiment, the carrier-fixed adjustment section is not a separate component from the feed dog. The adjustment section can be an integral part of the basic body. A mobility of the carrier-fixed adjustment section to the conveyor wall can then be achieved via a solid-state joint. The solid-state joint can be designed as a weakening section in the transition region between the conveyor wall and a carrier base body be. In principle, a multi-part embodiment of the transporter is possible in which, for example, the adjustment section represents a part detachable from the other transporter. Also, an embodiment of the adjustment section as a pivoting element, which is connected via a pivot joint with the main body of the conveyor, is possible.

Die Vorteile einer Nähmaschine nach Anspruch 10 entsprechen denen, die vorstehend unter Bezugnahme auf den erfindungsgemäßen Transporteur erläutert wurden.The advantages of a sewing machine according to claim 10 correspond to those which have been explained above with reference to the conveyor according to the invention.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend an Hand der Zeichnung näher erläutert. In dieser zeigen:

Fig. 1
eine teilweise innere Details freigebende bedienerseitige Seiten- ansicht einer Nähmaschine;
Fig. 2
vergrößert und stärker im Detail einen Stichbildungsbereich der Nähmaschine nach Fig. 1 mit einer Nähnadel, einem Greifer sowie einem Transporteur für Nähgut,
Fig. 3
eine perspektivische Ansicht des Transporteurs, gesehen schräg von einer von einem Nadel-Bewegungsbereich abgewandten Seite her;
Fig. 4
perspektivisch den Transporteur von einer im Vergleich zu Fig. 3 in etwa gegenüberliegenden Blickrichtung her;
Fig. 5
eine Aufsicht auf den Transporteur; und
Fig. 6
einen Schnitt gemäß Linie VI-VI in Fig. 5.
An embodiment of the invention will be explained in more detail with reference to the drawing. In this show:
Fig. 1
a partial side view of a sewing machine releasing partial internal details;
Fig. 2
enlarged and more detail in detail stitching area of the sewing machine Fig. 1 with a sewing needle, a gripper and a conveyor for sewing material,
Fig. 3
a perspective view of the conveyor, seen obliquely from a side facing away from a needle movement range side;
Fig. 4
in perspective the transporter of one compared to Fig. 3 in about the opposite direction;
Fig. 5
a view of the transporter; and
Fig. 6
a section according to line VI-VI in Fig. 5 ,

Eine Nähmaschine 1 weist eine Grundplatte 2 mit einem sich davon aufwärts erstreckenden Ständer 3 und einem abgewinkeltem Arm 4 auf. Letzterer endet in einem Kopf 5. In dem Arm 4 ist drehbar eine Armwelle 6 gelagert, die in dem Kopf 5 einen Kurbeltrieb 7 mit einem Fadenhebel 8 antreibt. Der Kurbeltrieb 7 steht antriebsmäßig mit einer in dem Kopf 5 verschiebbar gelagerten Nadelstange 9 in Verbindung. Letztere hat an ihrem unteren Ende eine Nähnadel 10. Die Nähnadel 10 ist vom Kurbeltrieb 7 auf und ab bewegbar. Hierbei durchläuft die Nähnadel 10 einen Nadel-Bewegungsbereich, der nachfolgend noch erläutert wird. Die Nähnadel 10 führt in einem Öhr einen von einer Spule 12 über eine Fadenspannvorrichtung und den Fadenhebel 8 zugeführten Nadelfaden 13.A sewing machine 1 has a base plate 2 with a stand 3 extending upwardly therefrom and an angled arm 4. The latter ends in a head 5. In the arm 4, an arm shaft 6 is rotatably mounted, which drives a crank mechanism 7 with a thread lever 8 in the head 5. The crank drive 7 is drivingly connected to a displaceably mounted in the head 5 needle bar 9 in conjunction. The latter has a sewing needle 10 at its lower end. The sewing needle 10 can be moved up and down by the crank mechanism 7. Here, the sewing needle 10 passes through a needle movement range, which will be explained below. The sewing needle 10 leads in an eye from a spool 12 via a thread tensioning device and the thread lever 8 supplied needle thread 13th

Auf der Grundplatte 2 ist eine Auflage- bzw. Stichplatte 14 montiert, auf der ein Nähgutteil 15 aufliegt. Die Auflageplatte 14 hat eine Stoffschieber-Öffnung bzw. Stichplatten-Ausnehmung 16, die für den Durchtritt eines Transporteurs bzw. Stoffschiebers 17 ausgebildet ist. Der Transporteur 17 hat ein Stichloch 18 zum Durchtritt der Nadel 10. Der Transporteur 17 ist über ein unterhalb der Grundplatte 2 angetriebenes Schub- und Hubgetriebe angetrieben.On the base plate 2, a support or throat plate 14 is mounted, on which a workpiece 15 rests. The support plate 14 has a feed slide opening or throat plate recess 16, which is designed for the passage of a feed dog or feed dog 17. The feed dog 17 has a tap hole 18 for the passage of the needle 10. The feed dog 17 is driven via a thrust and lifting gear driven below the base plate 2.

Unterhalb der Auflageplatte 14 ist ein Greifer 19 angeordnet, der einen Greiferkörper 20 mit einer Greiferspitze 21 aufweist. Letzterer ist fest mit einer Welle verbunden, die eine sich parallel zur Nadelstange 9 erstreckende, vertikale Drehachse 22 aufweist. Gelagert ist diese Welle drehbar in einem mit der Grundplatte 2 verschraubten Lagerbock 23. In diesem ist zudem eine Antriebswelle 24 gelagert, die mit einem im Innern des Lagerbocks 23 angeordneten Zahnradgetriebe verbunden ist. Die Antriebswelle 24 ist über einen Riementrieb 25 antriebsmäßig mit der Armwelle 6 verbunden.Below the support plate 14, a gripper 19 is arranged, which has a gripper body 20 with a gripper tip 21. The latter is firmly connected to a shaft which has a vertical axis of rotation 22 extending parallel to the needle bar 9. This shaft is rotatably mounted in a bearing block 23 screwed to the base plate 2. In this, a drive shaft 24 is also mounted, which is connected to a arranged in the interior of the bearing block 23 gear transmission. The drive shaft 24 is drivingly connected to the arm shaft 6 via a belt drive 25.

Fig. 2 zeigt den Stichbildungsbereich der Nähmaschine 1 stärker im Detail. Dargestellt ist die Situation, nachdem die Nähnadel 10 aus dem Stichloch 18 heraus wieder in Richtung auf den oberen Totpunkt zu zurückgezogen ist. Der Nadelfaden 13 bildet unterhalb des Stichlochs 18 eine Nadelfadenschlaufe 26, die bei der anschließenden Verknotung mit einem Unterfaden 27 verknotet wird. Letzterer wird dem Stichbildungsbereich von einem im Greiferkörper 20 untergebrachten Spulen- bzw. Fadenwickelgehäuse zugeführt. In Fig. 2 ist eine Nährichtung durch einen Richtungspfeil N angegeben. Fig. 2 shows the stitching area of the sewing machine 1 more in detail. Shown is the situation after the sewing needle 10 is withdrawn from the tap hole 18 out again towards the top dead center. The needle thread 13 forms below the stitch hole 18 a needle thread loop 26, which is knotted in the subsequent knotting with a lower thread 27. The latter is fed to the stitch formation area of a coil or thread winding housing housed in the gripper body 20. In Fig. 2 a direction of sewing is indicated by a directional arrow N.

Fig. 3 bis 6 zeigen den Transporteur 17 im Detail. Dieser hat einen oberen Transportabschnitt 28 mit einer beiderseits des Stichlochs 18 sägezahnartig ausgeführten Oberfläche zum reibschlüssigen Zusammenwirken mit dem Nähgut 15. Der Transportabschnitt 28 führt in der Stoffschiebe-Öffnung 16, also in der Stichplatten-Ausnehmung, eine Transportbewegung, gesteuert vom Schub- und Hubgetriebe aus. Da der Transportabschnitt 28 das Stichloch 18 ringförmig umgibt, ist der Transportabschnitt 28 dem Nadel-Bewegungsbereich 29, der in der Fig. 6 gestrichelt angedeutet ist, benachbart. Fig. 3 to 6 show the conveyor 17 in detail. This has an upper transport section 28 with a both sides of the stitch hole 18 sawtooth running surface for frictional engagement with the fabric 15. The transport section 28 leads in the cloth slide opening 16, ie in the throat plate recess, a transport movement, controlled by the push and screw gear out. Since the transporting portion 28 annularly surrounds the stitch hole 18, the transporting portion 28 is the needle moving portion 29, which in the Fig. 6 indicated by dashed lines, adjacent.

Über einen Grundkörper 30 ist der Transportabschnitt 28 fest mit einem Transporteur-Träger in Form eines Tragbalkens 31 verbunden, der seinerseits Teil des Schub- und Hubgetriebes für den Transporteur 17 ist.About a main body 30 of the transport section 28 is fixedly connected to a feed carrier in the form of a support beam 31, which in turn is part of the thrust and lifting gear for the conveyor 17.

Eine Transporteurwand 32 ist unterhalb des Transportabschnitts 28 benachbart zum Nadel-Bewegungsbereich 29 angeordnet. Die Transporteurwand 32 verläuft bei montiertem Transporteur 17 (vgl. Fig. 2) auf derjenigen Seite der Nadel 10, die von einem Stichbildungswerkzeug, das beim Nähen mit der Nadel 10 zusammenwirkt, also von der Greiferspitze 21 des Greifers 19, abgewandt ist. Die Nadel 10 liegt also im unteren Totpunkt zwischen der Transporteurwand 32 und einem gegebenenfalls vorhandenen Nadelschutzblech des Greifers 19.A conveyor wall 32 is disposed below the transport section 28 adjacent to the needle-moving area 29. The conveyor wall 32 runs at mounted transporter 17 (see. Fig. 2 ) on that side of the needle 10, which faces away from a stitch forming tool, which cooperates with the needle 10 during sewing, that is from the gripper tip 21 of the gripper 19. The needle 10 is thus in the bottom dead center between the conveyor wall 32 and an optional needle guard plate of the gripper 19th

Der Abstand A (vgl. Fig. 6) der Transporteurwand 32 zum Nadel-Bewegungsbereich 29 ist über eine Einstelleinrichtung 33 einstellbar. Letztere ist zur kontinuierlichen Einstellung des Abstandes A aufgeführt. Die Einstelleinrichtung 33 hat einen trägerfesten Einstellabschnitt 34. Dieser ist als bei montiertem Transporteur 17 horizontal verlaufender Steg ausgebildet, der einstückig mit dem Grundkörper 30 des Transporteurs 17 verbunden ist. Ferner hat die Einstelleinrichtung 33 einen Einstellkörper 35 in Form einer Innensechskantschraube, die als Stellschraube dient. Der Einstellkörper 35 ist in ein hierzu komplementäres Innengewinde 36 des trägerfesten Einstellabschnitts 34 eingeschraubt. Mit einem freien Ende 37 stützt sich der Einstellkörper 35 gegen die vom Nadel-Bewegungsbereich 29 abgewandte Seite der Transporteurwand 32 ab. Je nach der Einschraubtiefe des Einstellkörpers 35 in das Innengewinde 36 stützt sich der Einstellkörper 35 gegen den trägerfesten Einstellabschnitt 34 einerseits und gegen die Transporteurwand 32 andererseits mit einstellbarer Kraft ab.The distance A (see. Fig. 6 ) of the conveyor wall 32 to the needle movement area 29 is adjustable via an adjusting device 33. The latter is listed for continuous adjustment of the distance A. The adjusting device 33 has a carrier-fixed adjusting portion 34. This is formed as mounted transporter 17 horizontally extending web which is integrally connected to the main body 30 of the conveyor 17. Furthermore, the adjusting device 33 has an adjusting body 35 in the form of a hexagon socket screw, which serves as a set screw. The adjusting body 35 is screwed into a complementary internal thread 36 of the carrier-fixed adjustment section 34. With a free end 37, the adjusting body 35 is supported against the side facing away from the needle-movement region 29 side of the conveyor wall 32 from. Depending on the depth of engagement of the adjusting body 35 in the internal thread 36, the adjusting body 35 is supported against the carrier-fixed adjustment section 34 on the one hand and against the conveyor wall 32 on the other hand with adjustable force.

Die Transporteurwand 32 hat zwischen einem Stützabschnitt 38, an dem sich der Einstellkörper 35 abstützt, und einen Übergangsabschnitt 39 (vgl. Fig. 6) hin zum Transportabschnitt 28 einen Schwächungsabschnitt 40 mit verminderter Wandstärke. Im Schwächungsabschnitt 40 ist die Wandstärke der Transporteurwand 32 in etwa halbiert.The conveyor wall 32 has between a support portion 38, on which the adjusting body 35 is supported, and a transition portion 39 (see FIG. Fig. 6 ) towards the transport section 28 a weakening section 40 with reduced wall thickness. In the weakening section 40, the wall thickness of the conveyor wall 32 is approximately halved.

Die Transporteurwand 32 ist von benachbarten Abschnitten 41 über Durchgangsnuten 42 (vgl. Fig. 4) getrennt. Der Einstellkörper 35 stützt sich an der Transporteurwand 32 am Stützabschnitt 38, also am freien Ende der Transporteurwand 32, zwischen den beiden Durchgangsnuten 42 ab.The conveyor wall 32 is of adjacent sections 41 via passageways 42 (see FIG. Fig. 4 ) separated. The adjusting body 35 is supported on the conveyor wall 32 on the support section 38, ie at the free end of the conveyor wall 32, between the two passage grooves 42.

Bei der Justage der Transporteurwand 32 wird der Einstellkörper, also die Innensechskantschraube 35, solange eingeschraubt, bis die Nadel 10 am unteren Totpunkt gerade noch an der dann in Richtung auf den Nadel-Bewegungsbereich 29 zu verlagerten Transporteurwand 32 vorbeikommt. Die eingestellte Transporteurwand 32 ist im Vergleich zur kräftefreien Neutralstellung nach Fig. 6 auf Grund der Kraftwirkung des Einstellkörpers 35 im Bereich des Stützabschnitts 38 um den Schwächungsabschnitt 34 auf den Nadel-Bewegungsbereich 29 zu verschwenkt. Der Schwächungsabschnitt 40 dient insoweit als Festkörpergelenk.In the adjustment of the conveyor wall 32 of the adjusting body, so the hexagon socket screw 35, as long screwed until the needle 10 at bottom dead center just at the then in the direction of the needle-movement area 29 to be moved transporter wall 32 passes. The set transporter wall 32 is compared to the force-free neutral position after Fig. 6 due to the force effect of the adjusting body 35 in the region of the support portion 38 about the weakening portion 34 to the needle-moving portion 29 to be pivoted. The weakening section 40 serves as a solid-state joint.

Falls die Nadel 10, beispielsweise beim Durchstechen von schweren Materialien wie Leder, vom Greifer 19 weg ausgelenkt werden sollte, wird diese unerwünschte Verdrängungsbewegung der Nadel 10 durch Anlage der Nadel 10 an der eingestellten Transporteurwand 32 verhindert. Die Transporteurwand 32 wirkt also als Gegenstütze für die Nadel 10 in Gegenrichtung zur Stützwirkung eines gegebenenfalls vorhandenen Nadelschutzblechs des Greifers 19.If the needle 10 should be deflected away from the gripper 19, for example when piercing heavy materials such as leather, this undesired displacement movement of the needle 10 is prevented by abutment of the needle 10 on the adjusted transporter wall 32. The conveyor wall 32 thus acts as a counter support for the needle 10 in the opposite direction to the supporting action of an optionally present needle guard plate of the gripper 19.

Zudem sorgt die eingestellte Transporteurwand 32 dafür, dass die Nadelfadenschlaufe 26, die in der Schleifenhubstellung, die in der Fig. 2 gezeigt ist, entsteht, nicht unerwünscht vom Greifer 19 weg ausweichen kann, da diese Ausweichbewegung durch die Transporteurwand 32 verhindert ist.In addition, the set feed dog wall 32 ensures that the needle thread loop 26, which in the loop stroke position, in the Fig. 2 is shown, is formed, not undesirable from the gripper 19 can dodge away, since this evasive movement is prevented by the feed dog wall 32.

Je nach der verwendeten Stärke der Nähnadel 10 kann die Transporteurwand 32 über den Einstellkörper 35 in einfacher Weise fein justiert werden. Depending on the strength of the sewing needle 10 used, the conveyor wall 32 can be finely adjusted via the adjusting body 35 in a simple manner.

Claims (10)

  1. Transporter (17) for transporting sewing material (15) during the operation of a sewing machine (1) comprising
    - at least one transport section (28) which is designed for frictional interaction with the sewing material (15) and for performing a transport movement in a needle plate recess (16) of a needle plate (14) and is adjacent to a needle movement area (29),
    - a base body (30), by means of which the transport section (28) is connected securely to a transporter support (31),
    - a transporter wall (32), which is arranged underneath the transport section (28) adjacent to the needle movement area (29), wherein the transporter wall (32) is designed so that in an assembled transporter (17) it runs on the side of a needle (10) facing away from a stitch formation tool (19) which cooperates with the needle (10) during sewing,
    characterised by an adjusting device (33), by means of which the spacing (A) of the transporter wall (32) from the needle movement area (29) can be adjusted, such that even small deflections of the needle (10) in the direction of the transporter wall (32) mean that the transporter wall (32) supports the needle (10).
  2. Transporter according to claim 1, characterised in that the adjusting device (33) is designed for the continual adjustment of the spacing (A).
  3. Transporter according to claim 1 or 2, characterised in that the adjusting device (33) comprises:
    - a support-secured adjusting section (34),
    - an adjusting body (35), which is supported with adjustable force against the support-secured adjusting section (34) on the one hand and against the transporter wall (32) on the other hand.
  4. Transporter according to claim 3, characterised in that the transporter wall (32) between a support section (38), on which the adjusting body (35) is supported, and a transitional section (39) towards the basic body (30) has a weakened section (40) with a reduced wall thickness.
  5. Transporter according to claim 4, characterised in that in the weakened section (40) the wall thickness of the transporter wall (32) is halved.
  6. Transporter according to any one of claims 1 to 5, characterised in that the transporter wall (32) is separated from adjacent sections (41) of the basic body (30) by through grooves (42).
  7. Transporter according to claim 6, characterised in that the adjusting body (35) is supported on the transporter wall (32) at a free end (38) of the latter between the two through grooves (42).
  8. Transporter according to any one of claims 3 to 7, characterised in that the adjusting body (35) is designed as an adjusting screw, which is screwed into a thread (36) of the support-secured adjusting section (34) and is supported at one free end (37) against the transporter wall (32).
  9. Transporter according to any one of claims 3 to 8, characterised in that the support-secured adjusting section (34) is connected in one piece with the basic body (30).
  10. Sewing machine comprising
    - a stitch plate (14) with a stitch plate recess (16),
    - a needle rod (9) driven up and down above the stitch plate (14) with a sewing needle (10) attachable thereto,
    - a transporter (17) according to any one of claims 1 to 9 arranged to perform a transport movement in the stitch plate recess (16).
EP09006768A 2008-06-24 2009-05-20 Transporter for transporting sewing material while operating a sewing machine Not-in-force EP2138619B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008030000A DE102008030000A1 (en) 2008-06-24 2008-06-24 Transporter for the transport of sewing material during the operation of a sewing machine

Publications (2)

Publication Number Publication Date
EP2138619A1 EP2138619A1 (en) 2009-12-30
EP2138619B1 true EP2138619B1 (en) 2012-03-28

Family

ID=41090285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09006768A Not-in-force EP2138619B1 (en) 2008-06-24 2009-05-20 Transporter for transporting sewing material while operating a sewing machine

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EP (1) EP2138619B1 (en)
JP (1) JP2010005393A (en)
KR (1) KR101565618B1 (en)
CN (1) CN101613913B (en)
AT (1) ATE551457T1 (en)
DE (1) DE102008030000A1 (en)

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Publication number Priority date Publication date Assignee Title
CN102277696B (en) * 2010-06-09 2015-03-11 Vsm集团股份公司 Feeder movement compensation
CN102995303B (en) * 2011-09-09 2015-04-01 曾贤长 Guiding structure of cloth feeding mechanism
CN105088546B (en) * 2015-09-30 2018-11-30 杰克缝纫机股份有限公司 A kind of adjustment structure on sewing machine between feeding tooth and needle plate
TWI660085B (en) * 2016-11-30 2019-05-21 龍帝實業有限公司 Stitching method and device? for upper net threads of sewing machine without missing thread at the beginging
CN111910351A (en) * 2019-07-29 2020-11-10 福建亿泰自动化科技有限公司 Sewing machine with empty needle prevention device and using method thereof
JP2023092035A (en) * 2021-12-21 2023-07-03 Juki株式会社 sewing machine
JP2024078286A (en) * 2022-11-29 2024-06-10 Juki株式会社 sewing machine

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Publication number Priority date Publication date Assignee Title
GB206039A (en) * 1922-12-08 1923-11-01 Union Special Machine Co Improvements in feeding mechanism for sewing machines
CH258271A (en) * 1947-05-16 1948-11-30 Gegauf Eugen Fabric feed device on overcasting machines.
CH398182A (en) 1962-11-14 1965-08-31 Saurer Ag Adolph Gas turbine plant
US3320912A (en) * 1965-02-18 1967-05-23 Singer Co Convertible work-feeding devices for sewing machines
US4159004A (en) * 1978-04-28 1979-06-26 The Singer Company Work feeding mechanism for sewing machines
DE4316410C2 (en) * 1992-06-19 1994-10-06 Union Special Gmbh Sewing machine with a material feed device
JP4261698B2 (en) * 1999-01-21 2009-04-30 Ｊｕｋｉ株式会社 Sewing machine cloth feed mechanism
US6646383B2 (en) 2001-03-15 2003-11-11 Siemens Medical Solutions Usa, Inc. Monolithic structure with asymmetric coupling
JP2004174120A (en) 2002-11-29 2004-06-24 Juki Corp Feeding device of sewing machine

Also Published As

Publication number Publication date
ATE551457T1 (en) 2012-04-15
KR20100002138A (en) 2010-01-06
CN101613913A (en) 2009-12-30
EP2138619A1 (en) 2009-12-30
KR101565618B1 (en) 2015-11-03
DE102008030000A1 (en) 2009-12-31
JP2010005393A (en) 2010-01-14
CN101613913B (en) 2013-01-30

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