EP0756031A2 - Thread guiding device for schiffli embroidery machine - Google Patents

Thread guiding device for schiffli embroidery machine Download PDF

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Publication number
EP0756031A2
EP0756031A2 EP96810466A EP96810466A EP0756031A2 EP 0756031 A2 EP0756031 A2 EP 0756031A2 EP 96810466 A EP96810466 A EP 96810466A EP 96810466 A EP96810466 A EP 96810466A EP 0756031 A2 EP0756031 A2 EP 0756031A2
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Prior art keywords
thread
movement
guide
small
thread guide
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Granted
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EP96810466A
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German (de)
French (fr)
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EP0756031B1 (en
EP0756031A3 (en
Inventor
Franz Lässer
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Franz Laesser AG
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Franz Laesser AG
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/08—Thread-tensioning arrangements
    • D05C11/10—Guides, e.g. resilient

Definitions

  • the invention relates to a thread guide device for a Schifflistickmaschine, with a small and a large thread guide for the front thread leading from the bobbin to the needle, a first control element which serves for the movement of the large thread guide, and a second control element with which the strength of the thread tightening is adjusted can be.
  • the American patent 831 046 shows the Z-shaped guidance of the thread over the movable small thread guide to the movable large thread guide and from there to the needle.
  • the small and large thread guides are formed by rods. Each of these rods is supported by at least two levers that sit on a shaft that is controlled by a cam. There is therefore a cam for the small thread guide and a cam for the large thread guide.
  • An adjustment device makes it possible to adjust the movement of the small thread guide in order to adjust the strength of the thread tightening.
  • the small and large thread guides in the known Schifflist embroidery machines have the form of rods. Corresponding to the large number of working needles - there may be more than 1000 - a corresponding large number of threads run over these rods.
  • each thread must be passed under the first rod, which forms the small thread guide, and pulled over the second rod, which forms the large thread conductor, and inserted into the ear of the needle.
  • looping through the thread under the small thread guide is time-consuming and requires skillful hands.
  • the design of the small thread guide as a rod also has the disadvantage that reliable thread guidance is not guaranteed.
  • movement errors of the thread guide are to be reduced and the embroidery image is to be improved.
  • the thread guide the so-called "sorting", is to be improved.
  • the threading process should also be simplified.
  • a thread guide device of the type mentioned in the introduction in that the small thread guide is stationary and in that means are provided which superimpose the movement generated by the second control element on the movement generated by the first control element and transmit it to the large thread guide.
  • the thread guide device has the advantage that the small thread guide no longer has to be moved. Since only the large thread guide is thus moved, the possible summation of movement errors is eliminated. This leads to a more even embroidery pattern over the entire length of the machine. Even higher machine speeds are possible without significantly affecting the embroidery image.
  • the invention thus allows an increase in production without loss of quality compared to the known machines. There is also less thread breakage. Fewer parts are required than before and less mass has to be moved.
  • the small thread guide as a rod as before.
  • the small thread guide since the small thread guide no longer has to be moved, but is stationary, it can be formed by an eyelet. So there is an eyelet for hanging each thread.
  • This mounting is a simple and quick process.
  • the formation of the small thread guide as an eyelet also ensures good thread guidance.
  • a lever system is advantageously provided for superimposing the movement generated by the second control element on the movement caused by the first control element. This enables the desired superimposition of the movements to be implemented cost-effectively.
  • the lever system can consist of two lever parallelograms. The arrangement is expediently such that the first control element can act on a first lever parallelogram, that the second control element can act on a second lever parallelogram, that the first and second lever parallelograms have a common lever, and that the second lever parallelogram with the large thread guide connected is.
  • the invention can also be implemented using electronic means.
  • the invention provides a thread guide device for Schifflist embroidery machines, with a large thread guide for the front thread leading from the bobbin to the needle, a first control element which serves to move the large thread conductor, and a second control element with which the strength of the thread tension can be adjusted and characterized in that the first control element is a signal generator for generating a first movement curve signal, and that the second control element is a signal generator for generating a second movement curve signal corresponding to the desired thread take-up is that a protractor for controlling the signal generators according to the rotational position of the drive shaft is provided, that the outputs of the signal generators are connected to an adder circuit to add the two movement curve signals, and that the output of the adder circuit to the motor control for a drive motor for the large one Thread conductor is connected.
  • the tightening can be done to different degrees, as shown in Figure 2.
  • the arrangement of front thread 11 and rear thread 21 in FIG. 2 corresponds to the arrangement achieved when embroidering with the machine according to FIG. 4, where the needle 16 is located on the left side of the fabric web 20, also called the embroidery bottom.
  • FIG. 2a the front thread 11 was strongly tightened.
  • the front thread 11 and the rear thread 21 are equally strong.
  • the tightening of the rear thread 21 is stronger than that of the front thread 11.
  • the tightening strength of the front thread can be adjusted.
  • the setting changes the movement curve of the small thread guide.
  • the small thread guide 14 (FIG. 4) is stationary according to the invention. This is possible because the large thread guide 15 does not execute the movement according to curve G, but rather a movement that corresponds to one of curves G1, G2 or G3. These curves are obtained by superimposing one of the curves K1, K2,, K3, ... on the movement curve G. This can be done by mechanical or electronic means 18, 18 '( Figures 5 and 6). Thanks to the overlay, the small thread guide 14 no longer has to be moved. Rather, a stationary arrangement as shown in FIG. 4 is possible.
  • the small thread conductor 14 is designed as an eyelet, into which the front thread 11 can easily be inserted through a slot 17.
  • the front thread 11 runs over the stationary small thread conductor 14 and from there over the large thread conductor 15, which is shown in three different positions 15, 15 'and 15' '.
  • the front thread 11 leads from the large thread conductor 15 to the needle 16 in the usual way.
  • the large thread guide 15 may conventionally be in the form of a rod carried by two or more arms 25 attached to the shaft 27.
  • the shaft 27 is expediently driven by a lever mechanism, as is shown, for example, in FIG. 5.
  • the shaft 27 could also be driven by a motor, as will be shown later with reference to FIG. 6.
  • the large thread guide 15 is driven by two cam disks 29 and 31 driven by the drive shaft 30.
  • the cam disk 29 represents the control element for the large thread guide 15
  • Cam 31 is basically the same curve as that used in conventional machines for moving the small thread guide 14. Together with an adjusting device 33, it therefore represents a control element with which the strength of the thread tightening can be adjusted.
  • the cam disc 29 acts on a first lever parallelogram I consisting of the levers 35, 36 and 37.
  • the curve 31 acts on the levers 39, 41, 43 on a second lever parallelogram II, which is formed from the levers 37, 45 and 46.
  • the lever 46 is attached to the shaft 27.
  • the lever parallelograms I and II have a common lever 37, at the fulcrum 49 of which the lever 43 engages in order to overlay the movement curve G determined by the cam plate 29 with a movement curve K1, K2 or K3 determined by the cam plate 31 and the adjusting device 33.
  • the movement curves G1, G2 or G3 for the large thread guide 15 can also be generated with electronic means instead of mechanical means.
  • FIG. 6 shows how this can be achieved, for example.
  • An angle meter 51 supplies a signal which indicates the position of the drive shaft 30 of the embroidery machine. This signal controls a first signal generator 53 for generating a first movement curve signal G.
  • the signal of the angle meter 51 also controls a second signal generator 55 for generating a second movement curve signal K1, K2 or K3.
  • the second signal generator is connected to an adjusting device 57 with which the desired curve K1, K2 or K3 can be selected.
  • the outputs of the signal generators 53, 55 lead to an adder circuit 59 to convert the two motion curves, e.g. G and K1 to add.
  • the adder circuit 59 is connected to the motor controller 61, which controls the motor 63 for driving the shaft 27 of the large thread guide 15.

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

Abstract

A thread guiding appts. for a schiffle embroidery machine has a small (14) and a large (15) guide for the front thread (11) running from the reel to the needle (16). There is a first regulating member (29) which contributes to the movement of the large guide and a second regulating member (31) by which the thread tension can be adjusted. The small guide is stationary and means (18) are supplied for superimposing the second member's movement profile on that of the first and to transmit the combined movement to the large guide. Also claimed is a similar thread guiding appts. where the first regulating member is a signal generator to produce a signal analogous to a first movement profile and the second is a generator for a second profile. A phase detector controls the generators in accordance with the angular position of the drive shaft and their outputs are connected to a summing circuit, its output being connected to the controller for the motor drive to large thread guide.

Description

Die Erfindung betrifft eine Fadenleitvorrichtung für eine Schifflistickmaschine, mit einem kleinen und einem grossen Fadenleiter für den von der Spule zur Nadel führenden Vorderfaden, einem ersten Steuerorgan, welches der Bewegung des grossen Fadenleiters dient, und einem zweiten Steuerorgan, mit welchem die Stärke des Fadenanzugs eingestellt werden kann.The invention relates to a thread guide device for a Schifflistickmaschine, with a small and a large thread guide for the front thread leading from the bobbin to the needle, a first control element which serves for the movement of the large thread guide, and a second control element with which the strength of the thread tightening is adjusted can be.

Auch bei den bekannten modernen Schifflistickmaschinen findet bei der Fadenleitvorrichtung ein Prinzip Anwendung, das bereits rund hundert Jahre alt ist. So zeigt beispielsweise das amerikanische Patent 831 046 die Z-förmige Führung des Fadens über den beweglichen kleinen Fadenleiter zum beweglichen grossen Fadenleiter und von dort zur Nadel. Der kleine und der grosse Fadenleiter werden durch Stangen gebildet. Jede dieser Stangen wird durch mindestens zwei Hebel getragen, die auf einer Welle sitzen, die durch eine Kurvenscheibe gesteuert wird. Es ist also eine Kurvenscheibe für den kleinen Fadenleiter und eine Kurvenscheibe für den grossen Fadenleiter vorgesehen. Eine Justiervorrichtung ermöglicht es, die Bewegung des kleinen Fadenleiters zu justieren, um die Stärke des Fadenanzugs einzustellen.In the known modern ship embroidery machines, too, a principle is used in the thread guiding device which is already around a hundred years old. For example, the American patent 831 046 shows the Z-shaped guidance of the thread over the movable small thread guide to the movable large thread guide and from there to the needle. The small and large thread guides are formed by rods. Each of these rods is supported by at least two levers that sit on a shaft that is controlled by a cam. There is therefore a cam for the small thread guide and a cam for the large thread guide. An adjustment device makes it possible to adjust the movement of the small thread guide in order to adjust the strength of the thread tightening.

Wie bereits erwähnt, haben der kleine und der grosse Fadenleiter bei den bekannten Schifflistickmaschinen die Form von Stangen. Entsprechend der Vielzahl der arbeitenden Nadeln-es können über 1000 sein - läuft somit eine entsprechende Vielzahl von Fäden über diese Stangen. Beim Einfädeln der Nadeln muss jeder Faden unter der ersten Stange, welche den kleinen Fadenleiter bildet, hindurchgeführt und über die zweite Stange, welche den grossen Fadenleiter bildet, gezogen und in das Oehr der Nadel eingeführt werden. Insbesondere das Durchschlaufen des Fadens unter dem kleinen Fadenleiter ist zeitaufwendig und verlangt geschickte Hände. Die Ausbildung des kleinen Fadenleiters als Stange hat auch den Nachteil, dass eine sichere Fadenführung nicht gewährleistet ist. Es besteht die Gefahr, dass sich die Fäden von nicht arbeitenden Nadeln mit Fäden der arbeitenden Nadeln verwickeln, da die Stangen keine seitliche Führung der Fäden gewährleisten. Die Verwendung der üblichen Fadenleiter hat auch den grossen Nachteil, dass sich die Bewegungsfehler der beiden Fadenleiter summieren. Dies ist besonders bei langen Maschinen ein Problem. Wegen der Torsion der Antriebswellen ist insbesondere bei hohen Tourenzahlen die Bewegung der Fadenleiter nicht über den ganzen Bereich der Maschine gleichmässig. Die Fäden werden daher nicht über die ganze Maschinenlänge gleich stark angezogen. Darunter leidet dann das Stickbild.As already mentioned, the small and large thread guides in the known Schifflist embroidery machines have the form of rods. Corresponding to the large number of working needles - there may be more than 1000 - a corresponding large number of threads run over these rods. When threading the needles, each thread must be passed under the first rod, which forms the small thread guide, and pulled over the second rod, which forms the large thread conductor, and inserted into the ear of the needle. In particular, looping through the thread under the small thread guide is time-consuming and requires skillful hands. The design of the small thread guide as a rod also has the disadvantage that reliable thread guidance is not guaranteed. It exists the danger that the threads of non-working needles become tangled with threads of the working needles, since the rods do not ensure lateral guidance of the threads. The use of the usual thread guides also has the major disadvantage that the movement errors of the two thread guides add up. This is particularly a problem with long machines. Because of the torsion of the drive shafts, the movement of the thread conductors is not uniform over the entire area of the machine, especially at high speeds. The threads are therefore not tightened equally across the entire length of the machine. The embroidery pattern then suffers from this.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Fadenleitvorrichtung zu schaffen, welche die beschriebenen Nachteile der altbekannten und immer noch gebräuchlichen Fadenleitvorrichtungen vermeidet. Insbesondere sollen Bewegungsfehler der Fadenleiter reduziert und das Stickbild verbessert werden. Die Fadenführung, die sogenannte "Sortierung", soll verbessert werden. Auch soll der Einfädelvorgang vereinfacht werden.It is therefore an object of the present invention to provide a thread guiding device which avoids the described disadvantages of the well-known and still common thread guiding devices. In particular, movement errors of the thread guide are to be reduced and the embroidery image is to be improved. The thread guide, the so-called "sorting", is to be improved. The threading process should also be simplified.

Erfindungsgemäss wird dies durch eine Fadenleitvorrichtung der eingangs erwähnten Gattung dadurch erreicht, dass der kleine Fadenleiter stationär ist und dass Mittel vorgesehen sind, welche die vom zweiten Steuerorgan erzeugte Bewegung der vom ersten Steuerorgan erzeugten Bewegung überlagern und dem grossen Fadenleiter übertragen.According to the invention, this is achieved by a thread guide device of the type mentioned in the introduction in that the small thread guide is stationary and in that means are provided which superimpose the movement generated by the second control element on the movement generated by the first control element and transmit it to the large thread guide.

Die erfindungsgemässe Fadenleitervorrichtung hat den Vorteil, dass der kleine Fadenleiter nicht mehr bewegt werden muss. Da somit nur noch der grosse Fadenleiter bewegt wird, entfällt die mögliche Summierung von Bewegungsfehlern. Dies führt zu einem gleichmässigeren Stickbild über die ganze Länge der Maschine. Es sind sogar höhere Drehzahlen der Maschine möglich, ohne dass das Stickbild wesentlich beeinträchtigt wird. Die Erfindung erlaubt so im Vergleich zu den bekannten Maschinen eine Produktionssteigerung ohne Qualitätseinbusse. Es kommt auch weniger zu einem Fadenbruch. Es sind weniger Teile als bisher notwendig, und es ist auch weniger Masse zu bewegen.The thread guide device according to the invention has the advantage that the small thread guide no longer has to be moved. Since only the large thread guide is thus moved, the possible summation of movement errors is eliminated. This leads to a more even embroidery pattern over the entire length of the machine. Even higher machine speeds are possible without significantly affecting the embroidery image. The invention thus allows an increase in production without loss of quality compared to the known machines. There is also less thread breakage. Fewer parts are required than before and less mass has to be moved.

Es wäre möglich, den kleinen Fadenleiter wie bisher als eine Stange auszubilden. Da aber der kleine Fadenleiter nicht mehr bewegt werden muss, sondern stationär ist, kann er durch eine Oese gebildet werden. Es ist also für jeden Faden eine Oese zum Einhängen vorgesehen. Dies hat den Vorteil, dass beim Einfädeln der Faden nicht mehr unter einer Stange hindurchgezogen werden muss. Der Faden kann vielmehr über den grossen Fadenleiter hinweg zur Nadel geführt und eingefädelt werden, worauf dann der Faden mit den Fingern erfasst und an der Oese eingehängt werden kann. Dieses Einhängen ist ein einfacher und rasch durchführbarer Vorgang. Die Ausbildung des kleinen Fadenleiters als Oese sorgt auch für eine gute Fadenführung.It would be possible to design the small thread guide as a rod as before. However, since the small thread guide no longer has to be moved, but is stationary, it can be formed by an eyelet. So there is an eyelet for hanging each thread. This has the advantage that the thread no longer has to be pulled under a rod when threading. Rather, the thread can be guided and threaded through the large thread guide to the needle, whereupon the thread can be gripped with the fingers and hung on the eyelet. This mounting is a simple and quick process. The formation of the small thread guide as an eyelet also ensures good thread guidance.

Vorteilhaft wird ein Hebelsystem zur Ueberlagerung der vom zweiten Steuerorgan erzeugten Bewegung auf die vom ersten Steuerorgan bewirkten Bewegung vorgesehen. Dies ermöglicht eine kostengünstige Realisierung der gewünschten Ueberlagerung der Bewegungen. Das Hebelsystem kann aus zwei Hebelparallelogrammen bestehen. Die Anordnung ist dabei zweckmässigerweise so, dass das erste Steuerorgan auf ein erstes Hebelparallelogramm einwirken kann, dass das zweite Steuerorgan auf ein zweites Hebelparallelogramm einwirken kann, dass das erste und das zweite Hebelparallelogramm einen gemeinsamen Hebel aufweisen, und dass das zweite Hebelparallelogramm mit dem grossen Fadenleiter verbunden ist.A lever system is advantageously provided for superimposing the movement generated by the second control element on the movement caused by the first control element. This enables the desired superimposition of the movements to be implemented cost-effectively. The lever system can consist of two lever parallelograms. The arrangement is expediently such that the first control element can act on a first lever parallelogram, that the second control element can act on a second lever parallelogram, that the first and second lever parallelograms have a common lever, and that the second lever parallelogram with the large thread guide connected is.

Die Erfindung lässt sich auch mit elektronischen Mitteln realisieren. So sieht die Erfindung eine Fadenleitvorrichtung für Schifflistickmaschinen vor, mit einem grossen Fadenleiter für den von der Spule zur Nadel führenden Vorderfaden, einem ersten Steuerorgan, welches der Bewegung des grossen Fadenleiters dient, und einem zweiten Steuerorgan, mit welchem die Stärke des Fadenzugs eingestellt werden kann und dadurch gekennzeichnet ist, dass das erste Steuerorgan ein Signalgenerator zur Erzeugung eines ersten Bewegungskurvensignals ist, dass das zweite Steuerorgan ein Signalgenerator zur Erzeugung eines zweiten Bewegungskurvensignals entsprechend dem gewünschten Fadenanzug ist, dass ein Winkelmesser zur Steuerung der Signalgeneratoren entsprechend der Drehstellung der Antriebswelle vorgesehen ist, dass die Ausgänge der Signalgeneratoren an eine Addierschaltung angeschlossen sind, um die beiden Bewegungskurvensignale zu addieren, und dass der Ausgang der Addierschaltung an die Motorsteuerung für einen Antriebsmotor für den grossen Fadenleiter angeschlossen ist.The invention can also be implemented using electronic means. Thus, the invention provides a thread guide device for Schifflist embroidery machines, with a large thread guide for the front thread leading from the bobbin to the needle, a first control element which serves to move the large thread conductor, and a second control element with which the strength of the thread tension can be adjusted and characterized in that the first control element is a signal generator for generating a first movement curve signal, and that the second control element is a signal generator for generating a second movement curve signal corresponding to the desired thread take-up is that a protractor for controlling the signal generators according to the rotational position of the drive shaft is provided, that the outputs of the signal generators are connected to an adder circuit to add the two movement curve signals, and that the output of the adder circuit to the motor control for a drive motor for the large one Thread conductor is connected.

Ein Ausführungsbeispiel wird nun unter Bezugnahme auf die Zeichnung beschrieben. Es zeigt:

Fig. 1a-f
Stichbildungsvorgang in sechs Phasen bei einer Schifflistickmaschine gemäss dem Stand der Technik,
Fig. 2
die drei Grundformen des Stichs im Zweifadensystem, nämlich,
  • a) starker Anzug des Vorderfadens
  • b) gleicher Anzug von Vorderfaden und Hinterfaden
  • c) schwacher Anzug des Vorderfadens,
Fig. 3
die für die verschiedenen Stichbildungen notwendigen Bewegungskurven des kleinen Fadenleiters und die Bewegungskurve des grossen Fadenleiters sowie die erfindungsgemässe Ueberlagerung der Bewegungskurven,
Fig. 4
ein Ausführungsbeispiel der erfindungsgemässen Fadenleitvorrichtung,
Fig. 5
ein Hebelsystem zur Ueberlagerung von zwei Bewegungen zur Erzielung von Ueberlagerungskurven gemäss Figur 3 und
Fig. 6
eine schematische Darstellung einer elektronischen Steuerung für eine Fadenleitvorrichtung mit stationärem kleinem Fadenleiter.
An embodiment will now be described with reference to the drawing. It shows:
Fig. 1a-f
Stitch formation process in six phases in a ship embroidery machine according to the prior art,
Fig. 2
the three basic forms of stitch in the two-thread system, namely,
  • a) strong tightening of the front thread
  • b) same tightening of front thread and rear thread
  • c) weak tightening of the front thread,
Fig. 3
the movement curves of the small thread guide necessary for the different stitch formations and the movement curve of the large thread guide as well as the overlaying of the movement curves according to the invention,
Fig. 4
an embodiment of the thread guide device according to the invention,
Fig. 5
a lever system for superimposing two movements to achieve superimposition curves according to Figure 3 and
Fig. 6
is a schematic representation of an electronic control for a thread guide device with a stationary small thread guide.

In Figur 1 wird der Stichbildungsvorgang bei einer Schifflistickmaschine in sechs Phasen dargestellt. Diese Darstellung stammt aus dem Werk von Schöner, "Spitzen, Enzyklopädie der Spitzentechniken", Leipzig, 1980, Seiten 320/321. Der Vorderfaden 11, auch Nadelfaden genannt, führt von der Fadenspule 12 über das Sperrwerk 13 zum kleinen Fadenleiter 14 und von dort über den grossen Fadenleiter 15 zur Nadel 16. Der Hinterfaden 21, der von der Bobine 22 im Schiffchen 23 geliefert wird, wird bei der Stichbildung durch eine Schlaufe 24 des Vorderfadens 11 durchgeführt und von diesem festgezogen.In Figure 1, the stitch formation process in a Schifflistickmaschine is shown in six phases. This representation comes from the work of Schönes, "Spitzen, Encyclopedia of Lace Techniques", Leipzig, 1980, pages 320/321. The front thread 11, also called needle thread, leads from the thread spool 12 via the locking mechanism 13 to the small thread conductor 14 and from there via the large thread conductor 15 to the needle 16. The rear thread 21, which is supplied by the bobbin 22 in the shuttle 23, is included in the the stitch formation through a loop 24 of the front thread 11 and tightened by this.

Das Festziehen kann unterschiedlich stark erfolgen, wie dies in Figur 2 dargestellt wird. Die Anordnung von Vorderfaden 11 und Hinterfaden 21 in Fig. 2 entspricht der Anordnung, wie sie beim Sticken mit der Maschine gemäss Figur 4 erzielt wird, wo sich die Nadel 16 auf der linken Seite der Stoffbahn 20, auch Stickboden genannt, befindet.The tightening can be done to different degrees, as shown in Figure 2. The arrangement of front thread 11 and rear thread 21 in FIG. 2 corresponds to the arrangement achieved when embroidering with the machine according to FIG. 4, where the needle 16 is located on the left side of the fabric web 20, also called the embroidery bottom.

In Figur 2a erfolgte ein starker Anzug des Vorderfadens 11. Beim Stich gemäss Figur 2b ist der Anzug von Vorderfaden 11 und Hinterfaden 21 gleich stark. Beim Stich von Figur 2c jedoch ist der Anzug des Hinterfadens 21 stärker als jener des Vorderfadens 11.In FIG. 2a the front thread 11 was strongly tightened. In the stitch according to FIG. 2b, the front thread 11 and the rear thread 21 are equally strong. In the stitch of FIG. 2c, however, the tightening of the rear thread 21 is stronger than that of the front thread 11.

Bei den bekannten Stickmaschinen kann die Anzugsstärke des Vorderfadens eingestellt werden. Die Einstellung bewirkt eine Veränderung der Bewegungskurve des kleinen Fadenleiters.In the known embroidery machines, the tightening strength of the front thread can be adjusted. The setting changes the movement curve of the small thread guide.

In Figur 3 sind drei Bewegungskurven des kleinen Fadenleiters K1, K2, K3 dargestellt. Je weiter der kleine Fadenleiter 14 gegen den Stickboden 20 hin schwingt, desto mehr Faden 11 wird von der Spule 12 abgezogen. In Figur 3 ist auch die Kurve G des grossen Fadenleiters 15 dargestellt. Wenn dieser sich gegen den Stickboden 20 hin bewegt (Figur 1c), gibt er Faden 11 frei für die Bildung der Schlaufe 24. Bewegt sich dann der grosse Fadenleiter 15 ruckartig vom Stickboden weg in die Stellung von Figur le, so zieht er den Vorderfaden 11 an. Je nachdem der kleine Fadenleiter 14 in der Phase von Figur 1b wenig oder mehr Faden von der Spule abgezogen hat, wird der Vorderfaden straff (Figur 2a) oder weniger straff (Figur 2b oder 2c) angezogen.In Figure 3, three movement curves of the small thread guide K1, K2, K3 are shown. The further the small thread conductor 14 swings against the embroidery base 20, the more thread 11 is drawn off the bobbin 12. In Figure 3, the curve G of the large thread guide 15 is also shown. When this moves against the embroidery base 20 (FIG. 1 c), it releases thread 11 for the formation of the loop 24. If the large thread conductor 15 then moves jerkily away from the embroidery base into the position of FIG. 1, it pulls the front thread 11 at. Depending on the small thread guide 14 in the phase of Figure 1b little or more Has pulled thread from the bobbin, the front thread is tightened (Figure 2a) or less tight (Figure 2b or 2c).

Beim bekannten Stand der Technik bewegen sich der kleine Fadenleiter 14 und der grosse Fadenleiter 15 entsprechend den Kurven K1, K2, K3 und G (Figur 3).In the known prior art, the small thread guide 14 and the large thread guide 15 move in accordance with the curves K1, K2, K3 and G (FIG. 3).

Im Gegensatz zum bekannten Stand der Technik ist jedoch gemäss der Erfindung der kleine Fadenleiter 14 (Figur 4) stationär. Dies ist deshalb möglich, weil der grosse Fadenleiter 15 nicht die Bewegung gemäss der Kurve G ausführt, sondern eine Bewegung die einer der Kurven G1, G2 oder G3 entspricht. Diese Kurven werden dadurch erhalten, dass der Bewegungskurve G eine der Kurven K1, K2, ,K3,... überlagert wird. Dies kann durch mechanische oder elektronische Mittel 18, 18' erfolgen (Figuren 5 und 6). Dank der Ueberlagerung muss der kleine Fadenleiter 14 nicht mehr bewegt werden. Es ist vielmehr eine stationäre Anordnung möglich, wie sie in Figur 4 dargestellt ist. Der kleine Fadenleiter 14 ist als Oese ausgebildet, in welche der Vorderfaden 11 durch einen Schlitz 17 leicht eingeführt werden kann.In contrast to the known prior art, however, the small thread guide 14 (FIG. 4) is stationary according to the invention. This is possible because the large thread guide 15 does not execute the movement according to curve G, but rather a movement that corresponds to one of curves G1, G2 or G3. These curves are obtained by superimposing one of the curves K1, K2,, K3, ... on the movement curve G. This can be done by mechanical or electronic means 18, 18 '(Figures 5 and 6). Thanks to the overlay, the small thread guide 14 no longer has to be moved. Rather, a stationary arrangement as shown in FIG. 4 is possible. The small thread conductor 14 is designed as an eyelet, into which the front thread 11 can easily be inserted through a slot 17.

In Figur 4 führt der Vorderfaden 11 über den stationären kleinen Fadenleiter 14 und von dort über den grossen Fadenleiter 15, der in drei verschiedenen Stellungen 15, 15' und 15'' dargestellt ist. Vom grossen Fadenleiter 15 führt der Vorderfaden 11 in üblicher Weise zur Nadel 16.In FIG. 4, the front thread 11 runs over the stationary small thread conductor 14 and from there over the large thread conductor 15, which is shown in three different positions 15, 15 'and 15' '. The front thread 11 leads from the large thread conductor 15 to the needle 16 in the usual way.

Der grosse Fadenleiter 15 kann in konventioneller Weise die Form einer Stange aufweisen, die von zwei oder mehr Armen 25, welche an der Welle 27 befestigt sind, getragen wird. Der Antrieb der Welle 27 erfolgt zweckmässigerweise durch einen Hebelmechanismus, wie er beispielsweise in Figur 5 dargestellt wird. Die Welle 27 könnte aber auch von einem Motor angetrieben werden, wie dies später unter Bezugnahme auf Figur 6 dargestellt werden wird. Dem Antrieb des grossen Fadenleiters 15 dienen zwei von der Antriebswelle 30 angetriebene Kurvenscheiben 29 und 31. Die Kurvenscheibe 29 stellt das Steuerorgan für den grossen Fadenleiter 15 dar. Die Kurvenscheibe 31 ist grundsätzlich die gleiche Kurve, wie sie bei konventionellen Maschinen zur Bewegung des kleinen Fadenleiters 14 benützt wird. Sie stellt also zusammen mit einer Verstelleinrichtung 33 ein Steuerorgan dar, mit welchem die Stärke des Fadenanzugs eingestellt werden kann. Die Kurvenscheibe 29 wirkt auf ein erstes Hebelparallelogramm I bestehend aus den Hebeln 35, 36 und 37. Die Kurve 31 wirkt über die Hebel 39, 41, 43 auf ein zweites Hebelparallelogramm II, das aus den Hebeln 37, 45 und 46 gebildet ist. Der Hebel 46 ist an der Welle 27 befestigt. Die Hebelparallelogramme I und II haben einen gemeinsamen Hebel 37, an dessen Drehpunkt 49 der Hebel 43 angreift, um der von der Kurvenscheibe 29 bestimmten Bewegungskurve G eine von der Kurvenscheibe 31 und der Verstellvorrichtung 33 bestimmte Bewegungskurve K1, K2 oder K3 zu überlagern.The large thread guide 15 may conventionally be in the form of a rod carried by two or more arms 25 attached to the shaft 27. The shaft 27 is expediently driven by a lever mechanism, as is shown, for example, in FIG. 5. However, the shaft 27 could also be driven by a motor, as will be shown later with reference to FIG. 6. The large thread guide 15 is driven by two cam disks 29 and 31 driven by the drive shaft 30. The cam disk 29 represents the control element for the large thread guide 15 Cam 31 is basically the same curve as that used in conventional machines for moving the small thread guide 14. Together with an adjusting device 33, it therefore represents a control element with which the strength of the thread tightening can be adjusted. The cam disc 29 acts on a first lever parallelogram I consisting of the levers 35, 36 and 37. The curve 31 acts on the levers 39, 41, 43 on a second lever parallelogram II, which is formed from the levers 37, 45 and 46. The lever 46 is attached to the shaft 27. The lever parallelograms I and II have a common lever 37, at the fulcrum 49 of which the lever 43 engages in order to overlay the movement curve G determined by the cam plate 29 with a movement curve K1, K2 or K3 determined by the cam plate 31 and the adjusting device 33.

Die Bewegungskurven G1, G2 oder G3 für den grossen Fadenleiter 15 können statt mit mechanischen Mitteln auch mit elektronischen Mitteln erzeugt werden. Wie dies beispielsweise verwirklicht werden kann, zeigt Figur 6. Ein Winkelmesser 51 liefert ein Signal, das die Stellung der Antriebswelle 30 der Stickmaschine anzeigt. Dieses Signal steuert einen ersten Signalgenerator 53 zur Erzeugung eines ersten Bewegungskurvensignals G. Das Signal des Winkelmessers 51 steuert auch einen zweiten Signalgenerator 55 zur Erzeugung eines zweiten Bewegungskurvensignals K1, K2 oder K3. Der zweite Signalgenerator ist an eine Einstellvorrichtung 57 angeschlossen, mit welcher die gewünschte Kurve K1, K2 oder K3 gewählt werden kann. Die Ausgänge der Signalgeneratoren 53, 55 führen zu einer Addierschaltung 59, um die beiden Bewegungskurven, z.B. G und K1, zu addieren. Die Addierschaltung 59 ist an die Motorsteuerung 61 angeschlossen, welche den Motor 63 zum Antrieb der Welle 27 des grossen Fadenleiters 15 steuert.The movement curves G1, G2 or G3 for the large thread guide 15 can also be generated with electronic means instead of mechanical means. FIG. 6 shows how this can be achieved, for example. An angle meter 51 supplies a signal which indicates the position of the drive shaft 30 of the embroidery machine. This signal controls a first signal generator 53 for generating a first movement curve signal G. The signal of the angle meter 51 also controls a second signal generator 55 for generating a second movement curve signal K1, K2 or K3. The second signal generator is connected to an adjusting device 57 with which the desired curve K1, K2 or K3 can be selected. The outputs of the signal generators 53, 55 lead to an adder circuit 59 to convert the two motion curves, e.g. G and K1 to add. The adder circuit 59 is connected to the motor controller 61, which controls the motor 63 for driving the shaft 27 of the large thread guide 15.

Claims (6)

Fadenleitvorrichtung für Schifflistickmaschine, mit einem kleinen und einem grossen Fadenleiter (14,15) für den von der Spule (12) zur Nadel führenden Vorderfaden (11), einem ersten Steuerorgan (29), welches der Bewegung des grossen Fadenleiters (15) dient, und einem zweiten Steuerorgan (31), mit welchem die Stärke des Fadenanzugs eingestellt werden kann, dadurch gekennzeichnet, dass der kleine Fadenleiter (14) stationär ist und dass Mittel (18,18') vorgesehen sind, welche die vom zweiten Steuerorgan (31) erzeugte Bewegung (G) der vom ersten Steuerorgan (29) erzeugten Bewegung (K1,K2,K3...) überlagern und dem grossen Fadenleiter (15) übertragen.Thread guiding device for a ship embroidery machine, with a small and a large thread guide (14, 15) for the front thread (11) leading from the bobbin (12) to the needle, a first control member (29) which serves for the movement of the large thread guide (15), and a second control element (31) with which the strength of the thread take-up can be set, characterized in that the small thread conductor (14) is stationary and in that means (18, 18 ') are provided which are similar to those of the second control element (31) generated movement (G) overlay the movement (K1, K2, K3 ...) generated by the first control member (29) and transmitted to the large thread guide (15). Fadenleitvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der kleine Fadenleiter (14) durch eine Oese, insbesondere Einhängeöse, gebildet ist.Thread guiding device according to claim 1, characterized in that the small thread conductor (14) is formed by an eyelet, in particular a hanging eye. Fadenleitvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ein Hebelsystem (18) zur Ueberlagerung der vom zweiten Steuerorgan (31) erzeugten Bewegung auf die vom ersten Steuerorgan (29) bewirkten Bewegung vornimmt.Thread guiding device according to claim 1 or 2, characterized in that a lever system (18) for superimposing the movement generated by the second control member (31) onto the movement effected by the first control member (29). Fadenleitvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das erste Steuerorgan (29) auf ein erstes Hebelparallelogramm (I) einwirken kann, dass das zweite Steuerorgan (31) auf ein zweites Hebelparallelogramm (II) einwirken kann, dass das erste und das zweite Hebelparallelogramm (I,II) einen gemeinsamen Hebel (37) aufweisen, und dass das zweite Hebelparallelogramm (II) mit dem grossen Fadenleiter (15) verbunden ist.Thread guiding device according to one of claims 1 to 3, characterized in that the first control member (29) can act on a first lever parallelogram (I), that the second control member (31) can act on a second lever parallelogram (II) that the first and the second lever parallelogram (I, II) has a common lever (37), and that the second lever parallelogram (II) is connected to the large thread guide (15). Fadenleitvorrichtung für Schifflistickmaschinen mit einem grossen Fadenleiter (15) für den von der Spule (12) zur Nadel (16) führenden Vorderfaden (11), einem ersten Steuerorgan (29), welches der Bewegung des grossen Fadenleiters (15) dient, einem kleinen Fadenleiter (14), und einem zweiten Steuerorgan (31), mit welcher die Stärke des Fadenzugs eingestellt werden kann, dadurch gekennzeichnet, dass der kleine Fadenleiter (14) stationär ist, dass das erste Steuerorgan (31) ein Signalgenerator (53) zur Erzeugung eines ersten Bewegungskurvensignals (G) ist, dass das zweite Steuerorgan ein Signalgenerator (55) zur Erzeugung einer zweiten Bewegungskurvensignals ist, dass ein Winkelmesser (51) zur Steuerung des Signalgenerators (53,55) entsprechend der Drehstellung der Antriebswelle (30) vorgesehen ist, dass die Ausgänge der Signalgeneratoren (53,55) an eine Addierschaltung (59) angeschlossen sind, um die beiden Bewegungskurvensignale zu addieren, und dass der Ausgang die Addierschaltung (59) an die Motorsteuerung(61) für einen Antriebsmotor (63) für den grossen Fadenleiter (15) angeschlossen ist.Thread guiding device for ship embroidery machines with a large thread guide (15) for the front thread (11) leading from the bobbin (12) to the needle (16), a first control element (29) which serves to move the large thread guide (15), a small thread guide (14), and a second control element (31) with which the strength of the thread tension can be set, characterized in that the small thread conductor (14) is stationary, that the first control element (31) has a signal generator (53) for generating a first movement curve signal (G ) is that the second control element is a signal generator (55) for generating a second movement curve signal, that an angle meter (51) for controlling the signal generator (53, 55) is provided according to the rotational position of the drive shaft (30), that the outputs of the signal generators (53, 55) are connected to an adding circuit (59) in order to add the two movement curve signals, and that the output of the adding circuit (59) is connected to the motor control (61) for a drive motor (63) for the large thread conductor (15) is. Fadenleitvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der kleine Fadenleiter (14) durch eine Oese, insbesondere Einhängeöse, gebildet ist.Thread guiding device according to claim 5, characterized in that the small thread conductor (14) is formed by an eyelet, in particular a hanging eye.
EP96810466A 1995-07-26 1996-07-15 Thread guiding device for schiffli embroidery machine Expired - Lifetime EP0756031B1 (en)

Applications Claiming Priority (2)

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CH2191/95 1995-07-26
CH219195 1995-07-26

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0896082A1 (en) * 1997-07-31 1999-02-10 Franz Lässer AG Thread guide, particularly stationary thread guide
US6372274B2 (en) 1998-06-22 2002-04-16 Cryovac, Inc. Process for making a packaged product
WO2014114468A1 (en) * 2013-01-28 2014-07-31 Zoje Europe Gmbh Embroidery machine having at least one lockstitch rotating hook

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Publication number Priority date Publication date Assignee Title
DE256936C (en) * 1910-12-28
DE320199C (en) * 1912-07-31 1920-04-15 Charles Farmer Needle thread tensioner for embroidery machines
DE379373C (en) * 1921-12-12 1923-08-25 Vogtlaendische Maschinenfabrik Embroidery machine
US4373457A (en) * 1979-02-20 1983-02-15 August Heinzle Feed arrangement for textile machines
EP0666351B1 (en) * 1994-02-04 1997-05-07 Saurer Sticksysteme Ag Method and apparatus for embroidering on an embroidering machine with shuttles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE256936C (en) * 1910-12-28
DE320199C (en) * 1912-07-31 1920-04-15 Charles Farmer Needle thread tensioner for embroidery machines
DE379373C (en) * 1921-12-12 1923-08-25 Vogtlaendische Maschinenfabrik Embroidery machine
US4373457A (en) * 1979-02-20 1983-02-15 August Heinzle Feed arrangement for textile machines
EP0666351B1 (en) * 1994-02-04 1997-05-07 Saurer Sticksysteme Ag Method and apparatus for embroidering on an embroidering machine with shuttles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0896082A1 (en) * 1997-07-31 1999-02-10 Franz Lässer AG Thread guide, particularly stationary thread guide
US6372274B2 (en) 1998-06-22 2002-04-16 Cryovac, Inc. Process for making a packaged product
WO2014114468A1 (en) * 2013-01-28 2014-07-31 Zoje Europe Gmbh Embroidery machine having at least one lockstitch rotating hook
CN105283596A (en) * 2013-01-28 2016-01-27 中捷欧洲有限责任公司 Embroidery machine having at least one lockstitch rotating hook
CN105283596B (en) * 2013-01-28 2020-07-28 中捷欧洲有限责任公司 Embroidery machine with at least one double-lock stitch rotating shuttle

Also Published As

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ATE167904T1 (en) 1998-07-15
EP0756031B1 (en) 1998-07-01
EP0756031A3 (en) 1997-08-20
DE59600308D1 (en) 1998-08-06

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