EP0666351B1 - Method and apparatus for embroidering on an embroidering machine with shuttles - Google Patents
Method and apparatus for embroidering on an embroidering machine with shuttles Download PDFInfo
- Publication number
- EP0666351B1 EP0666351B1 EP94117733A EP94117733A EP0666351B1 EP 0666351 B1 EP0666351 B1 EP 0666351B1 EP 94117733 A EP94117733 A EP 94117733A EP 94117733 A EP94117733 A EP 94117733A EP 0666351 B1 EP0666351 B1 EP 0666351B1
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- EP
- European Patent Office
- Prior art keywords
- yarn
- thread
- needle
- embroidering
- shuttle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
-
- 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
- D05C11/02—Machine needles
- D05C11/06—Needle-driving or control mechanisms
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/04—Devices for inserting needles
Definitions
- the invention relates to a method for embroidering with a shuttle embroidery machine according to the preamble of claim 1 and an apparatus for carrying out this method according to the preamble of claim 3.
- each thread loops around a role assigned to it, which engages with a brake shaft common to all embroidery points and which are decoupled from this brake shaft when the relevant embroidery point is switched off can.
- Such an arrangement is known for example from DE-PS 34 16 266.
- the thread guides are arranged, which supply the thread quantity for loop formation and pull it back again. Furthermore, the type of movement of the thread conductors after the formation of a stitch creates a deficiency in the needle thread, which must be deliberately brought about in order to build up tension in the needle threads, which leads to a rotational movement of the rollers and the brake shaft and thus to a specific one Lots of needle thread leads. At the same time, the stitch formed is tightened with this thread tension in the needle thread. Braking the shaft is necessary in order to prevent the rollers and the shaft from running out in an uncontrolled manner, and thus to prevent an excessive amount of thread from being dispensed.
- a major disadvantage of this design is that the amount of thread supplied is insufficiently accurate, because the tension built up in the needle threads and thus the roll rotation depends on the thread consumption due to the formation of the previous stitch. As a result, the tightening tension with which the stitch formed is tightened is not constant, which results in unevenness in the embroidery pattern.
- the tensions in the needle threads increase further, which in turn results in an increase in thread breaks and a deterioration in the embroidery pattern.
- the tension in the needle threads increases more and more with increasing machine speed because the thread roller has to be moved in ever shorter times.
- the mode of operation of the device specified in this publication is limited to emulating the embroidery process as is known from conventional shuttle embroidery machines according to DE-PS 34 16 266.
- the method is also based on building up a thread tension in the needle thread during the process.
- EP-PS 0 014 897 teaches that by turning the roller back after the stitch formation, the stitch formed is tightened by tensioning the needle thread (page 4, column 6, lines 25 to 28). This process in turn leads to tensions in the needle threads, which limit the working speed and result in the occurrence of thread breaks.
- a needle thread length of about 100 millimeters must be supplied and retracted from the roller for each stitch, which requires the use of thread stores in front of the roller and additional means that prevent the threads from uncontrollably being wrapped around by the threads if they are included run onto the roller at high speed and are released again by the roller.
- the present invention is based on the object of specifying an embroidery method in which there are no longer any thread tensions which limit the working speed.
- the thread guide and the delivery unit provide as much thread for each working needle as is required for the penetration of the needle into the fabric to be embroidered, for the formation of a needle thread loop and for the passage of the boat through this loop, as well as the amount of thread that is required remains on the embroidery after the stitch is formed.
- This total amount of thread is supplied by the thread guide and thread delivery unit in such a way that thread tension never occurs in the needle thread.
- the needle thread remains stretched throughout the stitch formation, but always free of tension.
- An essential feature of the invention is that the stitch formed is then tightened by the pulling force of the shuttle thread. Through this type of tightening the stitch formed, the needle thread remains tension-free even in this phase of the embroidery process.
- the thread delivery unit and the thread guide determine the mode of operation of the thread delivery unit and the thread guide in such a way that the thread guide has that amount of thread supplies that is required for the penetration of the needle into the fabric to be embroidered, for the formation of a needle thread loop and for the passage of the boat through this loop, while the thread delivery unit supplies the amount of thread that remains on the fabric after stitch formation.
- the quantities of the thread portions to be delivered by the two elements thread guide and thread delivery unit are selected in such a way that thread tension can never occur in the needle thread.
- the needle thread remains stretched throughout the stitch formation, but always free of tension.
- the stitch formed is then tightened solely by the pulling force of the shuttle thread and the needle thread remains tension-free even during the phase of the embroidery process in which the stitch is tightened.
- the thread delivery unit as a long motor-driven shaft, over which the threads of several embroidery points run.
- a thread roll is assigned to each thread, which conveys the thread between itself and the shaft by friction.
- This arrangement enables the needle threads to be inserted very easily and quickly on the embroidery machine because the time-consuming looping of a brake roller with the threads is eliminated.
- a stationary deflection point as a thread monitor in the thread course from the thread delivery unit to the needle.
- the thread monitor checks for the presence of the needle thread and, if it is missing, initiates a shutdown of the embroidery machine.
- the risk of breakage is very low due to the absence of thread tension in the needle thread, the use of thread monitors is useful for detecting empty needle thread bobbins or thread bobbins.
- the embroidery machine 1 has an embroidery frame 2, in which the fabric 3 to be embroidered is clamped.
- the embroidery material frame 2 is, as usual, displaceable in the directions 4 and 5 perpendicular to the plane of the fabric to produce the pattern.
- a control unit 6 controls the movements of the embroidery material frame 2 and of the motor 8, which drives the thread feed roller 7 in the direction 12.
- Each embroidery point 42 is assigned a thread roll 9 which is rotatably mounted on a lever 10.
- the lever 10 is mounted on the pivot point 11, so that the thread roll 9 is lifted off the roller 7 by pivoting the lever 10 in the direction 13 and by pivoting the Lever 10 in the direction 14 of the needle thread 35 between the thread roller 9 and the thread roller 7 is clamped by the action of the spring 15. In this position, the needle thread 35 is withdrawn from the bobbin 16 by rotation of the thread roller 7 and fed to the embroidery site.
- the control unit 6 also drives the thread guide 17, the needle carriers 22 and the shuttle 25 via drives (not shown).
- the thread guide is pivoted about the pivot point 18 in the directions 19 and 20.
- the needle carrier 22 carries the needle 21, which is guided in the direction 23 into the fabric 3 and in the direction 24 out of this.
- the shuttle 25 is slidably mounted on the shuttle carrier 26 in the directions 27 and 28. Between thread roller 7 and thread conductor 17, needle thread 35 loops around a stationary deflection point 29, which is designed as thread monitor 30.
- FIG 3a shows the start of stitch formation with the needle 21 which has penetrated into the fabric 3 and which enters the needle channel 33 through the stitch hole 31 in the embroidery plate 32.
- a brief movement of the needle 21 in the direction 24 creates a needle thread loop 43 between the needle eye 34 and the tap hole 31, through which the shuttle 25 with the shuttle thread 36 is pushed in the further course.
- the shuttle thread supply is located in the shuttle 25 and exits the shuttle 40 from the opening 40 when an adjustable tensile force is applied.
- the needle eye 34 of the needle 21 enters the substance 3 at the new puncture point 39.
- the shuttle 25 pulls through its further movement in direction 28 by pulling on the shuttle thread 36 in direction 41 the interlacing 37 of needle thread 35 and shuttle thread 36. Due to the multiple deflections of the needle thread at the new puncture point 39 and at the previous puncture point 38, the resulting tension cannot be transferred to that part of the needle thread 35 which lies in front of the needle eye 39 on the front of the fabric 3.
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- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zum Sticken mit einer Schiffchen-Stickmaschine nach dem Oberbegriff des Anspruchs 1, und eine Vorrichtung zur Durchführung dieses Verfahrens nach dem Oberbegriff des Anspruchs 3.The invention relates to a method for embroidering with a shuttle embroidery machine according to the preamble of
An herkömmlichen Schiffchen-Stickmaschinen mit einzeln schaltbaren Stickstellen erfolgt die Zufuhr der Nadelfäden so, dass jeder Faden eine ihm zugeordnete Rolle umschlingt, die bei eingeschalteter Stickstelle mit einer allen Stickstellen gemeinsamen Bremswelle im Eingriff steht und die beim Ausschalten der betreffenden Stickstelle von dieser Bremswelle entkoppelt werden kann. Eine solche Anordnung ist beispielsweise aus der DE-PS 34 16 266 bekannt.On conventional shuttle embroidery machines with individually switchable embroidery points, the needle threads are fed in such a way that each thread loops around a role assigned to it, which engages with a brake shaft common to all embroidery points and which are decoupled from this brake shaft when the relevant embroidery point is switched off can. Such an arrangement is known for example from DE-PS 34 16 266.
Zwischen den Rollen und den Sticknadeln sind die Fadenleiter angeordnet, welche die Fadenmenge für die Schlingenbildung liefern und wieder zurückziehen. Im weiteren sorgen die Fadenleiter durch die Art ihrer Bewegung nach der Bildung eines Stichs für ein Manko im Nadelfaden, welches bewusst herbeigeführt werden muss, um in den Nadelfäden eine Spannung aufzubauen, die zu einer Drehbewegung der Rollen und der Bremswelle und damit zur Abgabe einer bestimmten Menge von Nadelfaden führt. Gleichzeitig wird mit dieser Fadenspannung im Nadelfaden der gebildete Stich festgezogen. Das Bremsen der Welle ist dabei notwendig, um ein unkontrolliertes Auslaufen der Rollen und der Welle und damit die Abgabe einer zu grossen Fadenmenge zu verhindern.Between the rollers and the embroidery needles, the thread guides are arranged, which supply the thread quantity for loop formation and pull it back again. Furthermore, the type of movement of the thread conductors after the formation of a stitch creates a deficiency in the needle thread, which must be deliberately brought about in order to build up tension in the needle threads, which leads to a rotational movement of the rollers and the brake shaft and thus to a specific one Lots of needle thread leads. At the same time, the stitch formed is tightened with this thread tension in the needle thread. Braking the shaft is necessary in order to prevent the rollers and the shaft from running out in an uncontrolled manner, and thus to prevent an excessive amount of thread from being dispensed.
Ein wesentlicher Nachteil dieser Ausführung ist, dass die gelieferte Fadenmenge ungenügend genau ist, weil die in den Nadelfäden aufgebaute Spannung und damit die Walzendrehung vom Fadenverbrauch durch die Bildung des vorhergehenden Stichs abhängt. Dadurch ist auch die Anzugsspannung, mit welcher der gebildete Stich festgezogen wird, nicht konstant, was sich in Ungleichmässigkeiten im Stickbild auswirkt. Beim Arbeiten mit Nadelkombinationen (Rapporten), bei denen nur wenige Nadeln arbeiten, vergrössern sich die Spannungen in den Nadelfäden weiter, was sich wiederum in einer Zunahme von Fadenbrüchen und einer Beeinträchtigung des Stickbildes auswirkt. Im weiteren steigt die Spannung in den Nadelfäden mit zunehmender Maschinendrehzahl immer mehr an, weil die Fadenwalze in immer kürzerer Zeit bewegt werden muss.A major disadvantage of this design is that the amount of thread supplied is insufficiently accurate, because the tension built up in the needle threads and thus the roll rotation depends on the thread consumption due to the formation of the previous stitch. As a result, the tightening tension with which the stitch formed is tightened is not constant, which results in unevenness in the embroidery pattern. When working with needle combinations (repeats), in which only a few needles work, the tensions in the needle threads increase further, which in turn results in an increase in thread breaks and a deterioration in the embroidery pattern. Furthermore, the tension in the needle threads increases more and more with increasing machine speed because the thread roller has to be moved in ever shorter times.
Aus der EP-PS 0 014 897 ist eine Vorrichtung bekannt, bei der eine von den Nadelfäden umschlungene Walze mit einem Antrieb versehen ist, der den Zuführungs- und Abzugsweg der Walze unabhängig von der Fadenspannung vorgibt und bei der zusätzlich die Fadenleiter entfallen, weil die von diesen freigegebene und wieder zurückgezogene Fadenmenge ebenfalls von der angetriebenen Walze geliefert und zurückgezogen wird.From EP-PS 0 014 897 a device is known in which a roller wrapped by the needle threads is provided with a drive which specifies the feed and withdrawal path of the roller independently of the thread tension and in which the thread conductors are also omitted because the of these released and withdrawn thread quantity is also supplied and withdrawn by the driven roller.
Die in dieser Druckschrift angegebene Arbeitsweise der Einrichtung beschränkt sich allerdings darauf, den Stickprozess so nachzubilden, wie dies von herkömmlichen Schiffchen-Stickmaschinen nach der DE-PS 34 16 266 bekannt ist. Das Verfahren beruht weiterhin darauf, während dem Prozess im Nadelfaden eine Fadenspannung aufzubauen. Insbesondere lehrt die EP-PS 0 014 897, dass durch ein Zurückdrehen der Walze nach der Stichbildung der gebildete Stich festgezogen wird, indem der Nadelfaden gespannt wird (Seite 4, Spalte 6, Zeilen 25 bis 28). Dieses Verfahren führt wiederum zu Spannungen in den Nadelfäden, welche die Arbeitsgeschwindigkeit begrenzen und das Auftreten von Fadenbrüchen zur Folge haben.However, the mode of operation of the device specified in this publication is limited to emulating the embroidery process as is known from conventional shuttle embroidery machines according to DE-PS 34 16 266. The method is also based on building up a thread tension in the needle thread during the process. In particular, EP-PS 0 014 897 teaches that by turning the roller back after the stitch formation, the stitch formed is tightened by tensioning the needle thread (
Weiter muss bei dieser Anordnung bei jedem Stich eine Nadelfadenlänge von etwa 100 Millimetern von der Walze geliefert und wieder zurückgezogen werden, was den Einsatz von Fadenspeichern vor der Walze und zusätzliche Mittel erfordert, die das unkontrollierte Umwickeln der Walze durch die Fäden verhindern, wenn diese mit hoher Geschwindigkeit auf die Walze auflaufen und von der Walze wieder abgegeben werden.In addition, with this arrangement, a needle thread length of about 100 millimeters must be supplied and retracted from the roller for each stitch, which requires the use of thread stores in front of the roller and additional means that prevent the threads from uncontrollably being wrapped around by the threads if they are included run onto the roller at high speed and are released again by the roller.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Stickverfahren anzugeben, bei dem keine die Arbeitsgeschwindigkeit begrenzenden Fadenspannungen mehr auftreten.The present invention is based on the object of specifying an embroidery method in which there are no longer any thread tensions which limit the working speed.
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved by the characterizing features of
Vorteilhafte Ausführungen der Erfindung sind in den abhängigen Ansprüchen angegebenAdvantageous embodiments of the invention are specified in the dependent claims
Erfindungsgemäss stellen der Fadenleiter und die Liefereinheit für jede arbeitende Nadel so viel Faden zur Verfügung wie für das Eindringen der Nadel in den zu bestickenden Stoff, für die Bildung einer Nadelfadenschlinge und für den Durchgang des Schiffchens durch diese Schlinge benötigt wird, sowie diejenige Fadenmenge, die nach der Bildung des Stiches auf dem Stickgut verbleibt. Diese gesamte Fadenmenge wird durch Fadenleiter und Fadenliefereinheit so geliefert, dass im Nadelfaden nie eine Fadenspannung entsteht. Dadurch bleibt der Nadelfaden während der gesamten Stichbildung gestreckt, aber immer spannungsfrei. Ein wesentliches Merkmal der Erfindung ist, dass der gebildete Stich anschliessend durch die Abzugskraft des Schiffchenfadens festgezogen wird. Durch diese Art des Festziehens des gebildeten Stiches bleibt der Nadelfaden auch in dieser Phase des Stickprozesses spannungsfrei.According to the invention, the thread guide and the delivery unit provide as much thread for each working needle as is required for the penetration of the needle into the fabric to be embroidered, for the formation of a needle thread loop and for the passage of the boat through this loop, as well as the amount of thread that is required remains on the embroidery after the stitch is formed. This total amount of thread is supplied by the thread guide and thread delivery unit in such a way that thread tension never occurs in the needle thread. As a result, the needle thread remains stretched throughout the stitch formation, but always free of tension. An essential feature of the invention is that the stitch formed is then tightened by the pulling force of the shuttle thread. Through this type of tightening the stitch formed, the needle thread remains tension-free even in this phase of the embroidery process.
In einer bevorzugten Ausführungsform der Erfindung gemäss Anspruch 2 wird vorgeschlagen, die Arbeitsweise der Fadenliefereinheit und des Fadenleiters so festzulegen, dass der Fadenleiter diejenige Fadenmenge liefert, die für das Eindringen der Nadel in den zu bestickenden Stoff, für die Bildung einer Nadelfadenschlinge und für den Durchgang des Schiffchens durch diese Schlinge benötigt wird, während die Fadenliefereinheit diejenige Fadenmenge liefert, die nach der Stichbildung auf dem Stoff verbleibt. Die Mengen der zu liefernden Fadenanteile durch die beiden Elemente Fadenleiter und Fadenliefereinheit werden so gewählt, dass im Nadelfaden zu keinem Zeitpunkt eine Fadenspannung auftreten kann. Dadurch bleibt der Nadelfaden während der ganzen Stichbildung gestreckt, aber immer spannungsfrei. Auch in dieser Ausführung wird der gebildete Stich anschliessend einzig durch die Abzugskraft des Schiffchenfadens festgezogen und der Nadelfaden bleibt auch während derjenigen Phase des Stickprozesses spannungsfrei, in der das Festziehen des Stichs erfolgt.In a preferred embodiment of the invention according to
Es treten damit keine von der Maschinendrehzahl und von der Stichlänge abhängigen Fadenspannungen mehr auf, welche die Arbeitsgeschwindigkeit der Maschine begrenzen. Das Aussehen der nach diesem Verfahren gebildeten Stiche lässt sich einfach und exakt beeinflussen und es resultieren Stiche von hoher Gleichmässigkeit. Die Fadenspannung ist zudem unabhängig von der Zahl arbeitender Nadeln. Dadurch ergibt sich eine grössere Flexibilität. Während in den bisher bekannten Maschinen der jeweilige Rapport wegen der unterschiedlichen Fadenspannung, je nachdem ob mit vielen oder nur wenigen Nadeln gearbeitet wird, einen direkten Einfluss auf die Qualität des Produkts ausübt, entfällt ein solch unerwünschter Einfluss nach der Erfindung und die Qualität ist für alle Rapporte gleichbleibend hoch.There are no longer any thread tensions dependent on the machine speed and stitch length, which limit the working speed of the machine. The appearance of the stitches formed by this method can be influenced simply and precisely and stitches of high uniformity result. The thread tension is also independent of the number of working needles. This results in greater flexibility. While in the previously known machines the respective repeat has a direct influence on the quality of the product due to the different thread tension, depending on whether many or only a few needles are used, such an undesirable influence according to the invention is eliminated and the quality is for everyone Reports consistently high.
Erfindungsgemäss wird weiter vorgeschlagen, die Fadenliefereinheit als eine lange motorisch angetriebene Welle auszubilden, über welche die Fäden mehrerer Stickstellen laufen. Jedem Faden ist eine Fadenrolle zugeordnet, die den Faden zwischen sich und der Welle durch Reibschluss fördert.According to the invention, it is further proposed to design the thread delivery unit as a long motor-driven shaft, over which the threads of several embroidery points run. A thread roll is assigned to each thread, which conveys the thread between itself and the shaft by friction.
Diese Anordnung ermöglicht ein sehr einfaches und schnelles Einlegen der Nadelfäden auf der Stickmaschine, weil das zeitraubende Umschlingen einer Bremswalze mit den Fäden entfällt.This arrangement enables the needle threads to be inserted very easily and quickly on the embroidery machine because the time-consuming looping of a brake roller with the threads is eliminated.
Wird eine Stickstelle vorübergehend stillgelegt, so kann dies durch einfaches Abheben der entsprechenden Fadenrolle von der Walze erfolgen. Dadurch wird die Lieferung von Faden an der betreffenden Stickstelle unterbunden.If an embroidery site is temporarily shut down, this can be done by simply lifting the corresponding thread roll from the roller. This prevents the thread from being delivered to the embroidery site in question.
Weiter wird im Rahmen der Erfindung vorgeschlagen, im Fadenverlauf von der Fadenliefereinheit bis zur Nadel eine stationäre Umlenkstelle als Fadenwächter auszubilden. Der Fadenwächter prüft das Vorhandensein des Nadelfadens und leitet bei dessen Fehlen ein Stillsetzen der Stickmaschine ein. Obwohl durch das Fehlen von Fadenspannungen im Nadelfaden die Gefahr von Brüchen sehr gering ist, ist der Einsatz von Fadenwächtern nützlich, um etwa leergelaufene Nadelfadenspulen oder chenfadenspulen zu erkennen.Furthermore, it is proposed within the scope of the invention to design a stationary deflection point as a thread monitor in the thread course from the thread delivery unit to the needle. The thread monitor checks for the presence of the needle thread and, if it is missing, initiates a shutdown of the embroidery machine. Although the risk of breakage is very low due to the absence of thread tension in the needle thread, the use of thread monitors is useful for detecting empty needle thread bobbins or thread bobbins.
Die Erfindung wird im Folgenden anhand von Ausführungsbeispielen mit Bezug auf die Zeichnungen erläutert. Die Zeichnungen stellen dar:
- Fig. 1
- eine perspektivische Ansicht einer Stickmaschine.
- Fig. 2
- im Querschnitt eine Ausführungsform einer Stickstelle zur Durchführung des erfindungsgemässen Ver fahrens, und
- Fig. 3a bis Fig. 3d
- eine Darstellung der Stichbildung gemäss dem erfindungsgemässen Verfahren in vier Schritten.
- Fig. 1
- a perspective view of an embroidery machine.
- Fig. 2
- in cross section an embodiment of an embroidery site for performing the inventive method, and
- 3a to 3d
- a representation of the stitch formation according to the inventive method in four steps.
Die Stickmaschine 1 besitzt einen Stickgutrahmen 2, in welchen der zu bestickenden Stoff 3 eingespannt ist. Der Stickgutrahmen 2 ist, wie üblich, in den Richtungen 4 und 5 senkrecht zur Ebene des Stoffs zur Erzeugung des Musters verschiebbar. Eine Steuereinheit 6 steuert die Bewegungen des Stickgutrahmens 2 sowie des Motors 8, der die Fadenlieferwalze 7 in Richtung 12 antreibt. Jeder Stickstelle 42 ist eine Fadenrolle 9 zugeordnet, die an einem Hebel 10 drehbar gelagert ist. Der Hebel 10 ist am Drehpunkt 11 gelagert, so dass durch Schwenken des Hebels 10 in Richtung 13 die Fadenrolle 9 von der Walze 7 abgehoben wird und durch Schwenken des Hebels 10 in Richtung 14 der Nadelfaden 35 zwischen der Fadenrolle 9 und der Fadenwalze 7 durch die Wirkung der Feder 15 geklemmt wird. In dieser Stellung wird der Nadelfaden 35 durch Drehung der Fadenwalze 7 von der Spule 16 abgezogen und der Stickstelle zugeführt.The
Weiter treibt die Steuereinheit 6 über nicht dargestellte Antriebe den Fadenleiter 17, die Nadelträger 22 und die Schiffchen 25. Der Fadenleiter wird um den Drehpunkt 18 in die Richtungen 19 und 20 verschwenkt. Der Nadelträger 22 trägt die Nadel 21, die in Richtung 23 in den Stoff 3 und in Richtung 24 wieder aus diesem herausgeführt wird. Das Schiffchen 25 ist auf dem Schiffchenträger 26 in den Richtungen 27 und 28 verschiebbar gelagert. Zwischen Fadenwalze 7 und Fadenleiter 17 umschlingt der Nadelfaden 35 eine stationäre Umlenkstelle 29, die als Fadenwächter 30 ausgebildet ist.The
Die Stichbildung nach dem erfindungsgemässen Verfahren wird nachfolgend anhand der Figuren 3a bis 3d beschrieben:The stitch formation according to the method according to the invention is described below with reference to FIGS. 3a to 3d:
Fig. 3a zeigt den Beginn der Stichbildung mit der in den Stoff 3 eingedrungenen Nadel 21, die durch das Stichloch 31 in der Stickplatte 32 in den Nadelkanal 33 gelangt. Durch eine kurze Bewegung der Nadel 21 in Richtung 24 entsteht zwischen dem Nadelöhr 34 und dem Stichloch 31 eine Nadelfadenschlinge 43, durch die im weiteren Verlauf das Schiffchen 25 mit dem Schiffchenfaden 36 geschoben wird. Der Schiffchenfadenvorrat befindet sich im Schiffchen 25 und tritt bei Anwendung einer einstellbaren Zugkraft aus der Öffnung 40 aus dem Schiffchen aus.3a shows the start of stitch formation with the
In Fig. 3b ist dieser Durchgang des Schiffchens 25 durch die Schlinge 43 erfolgt, wodurch nun der Nadelfaden 35 und der Schiffchenfaden 36 miteinander eine Verschlingung 37 aufweisen. Das Schiffchen 25 wird in Richtung 28 nach unten verschoben, während der Stoff 3 (als zeichnerisches Beispiel) in Richtung 4 verschoben wird.In Fig. 3b this passage of the
In Fig. 3c hat sich die Verschiebung des Schiffchens 25 nach unten in Richtung 28, wie auch die Verschiebung des Stoffes 3 fortgesetzt. Die Verschlingung 37 von Nadelfaden und Schiffchenfaden liegt zwischen dem Stichloch 31 und der letzten Einstichstelle 38. Die Sticknadel 21 setzt sich wieder in Richtung 23 in Bewegung, um einen neuen Einstich vorzunehmen.3c, the displacement of the
In Fig. 3d tritt das Nadelöhr 34 der Nadel 21 an der neuen Einstichstelle 39 in den Stoff 3 ein. Das Schiffchen 25 zieht durch seine weitere Bewegung in Richtung 28 durch Zug am Schiffchenfaden 36 in Richtung 41 die Verschlingung 37 von Nadelfaden 35 und Schiffchenfaden 36 straff. Durch die mehrfachen Umlenkungen des Nadelfadens an der neuen Einstichstelle 39 und an der vorhergehenden Einstichstelle 38 kann sich die dabei entstehende Spannung nicht in denjenigen Teil des Nadelfadens 35 übertragen, der vor dem Nadelöhr 39 auf der Vorderseite des Stoffs 3 liegt.In FIG. 3d, the
Erfindungsgemäss gelingt es dadurch, die gebildete Verschlingung 37 ausschliesslich durch die Abzugskraft im Schiffchenfaden 36, welche aufgebaut wird durch das Herausziehen des Schiffchenfadens aus der Austrittsöffnung 40 im Schiffchen 25, festzuziehen. Der Fadenleiter 17 und die Lieferwalze 7 stellen dabei stets eine so grosse Fadenmenge zur Verfügung, dass der Nadelfaden 34 immer gestreckt, aber immer spannungsfrei bleibt.According to the invention, it is thereby possible to tighten the
Claims (5)
- A method for embroidering on an embroidering machine with shuttles comprising a driven yam delivering unit and at least one movable yarn guide and a control unit for controlling the frame holding the cloth to be fitted with an embroidery and said yarn delivery unit as well as for driving said yarn guide, the needles and the shuttles, characterized in that the yarn guide and the delivery unit are delivering the quantity of yarn necessary for the entry of the needle into the cloth and for the formation of the loop and for the passage of the shuttle through the loop as well as the quantity of yarn to be brought onto the cloth to be embroidered for the formation of the pitch, and in that the needle yarn is held practically without tension during the whole formation of the pitch and in that tensioning of the pitch is made exclusively by the drawing force of the shuttle yarn.
- A method according to claim 1, characterized in that the yarn guide is delivering the quantity of yarn necessary for the entry of the needle into the cloth to be embroidered and for the formation of the loop and for the passage of the shuttle through the loop, and in that the yarn delivery unit is delivering the quantity of yarn remaining on the cloth after the formation of the pitch.
- Apparatus for carrying out the methode of claim 1 or 2, characterized in that the yarn delivery unit comprises a motor driven cylinder (7), over which pass the yarns of a plurality of embroidering places and in that for each embroidering place there is provided a yarn reel (9) transporting the yarn (35) by positive friction between the cylinder (7) and the yarn reel (9).
- Apparatus according to claim 3, characterized in that the yarn reels (9) can be individually switched on or off for each embroidering place, either manually or by a programmed control.
- Apparatus according to any of claims 3 or 4, characterized in that a stationary deflecting means (29) in the form of a stop motion device (30) is mounted in the yarn path between the yarn delivery unit and the needle (21).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4403365 | 1994-02-04 | ||
| DE4403365A DE4403365A1 (en) | 1994-02-04 | 1994-02-04 | Method and device for embroidery on a shuttle embroidery machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0666351A1 EP0666351A1 (en) | 1995-08-09 |
| EP0666351B1 true EP0666351B1 (en) | 1997-05-07 |
Family
ID=6509409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94117733A Expired - Lifetime EP0666351B1 (en) | 1994-02-04 | 1994-11-10 | Method and apparatus for embroidering on an embroidering machine with shuttles |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0666351B1 (en) |
| JP (1) | JPH0835162A (en) |
| KR (1) | KR950032807A (en) |
| AT (1) | ATE152789T1 (en) |
| DE (2) | DE4403365A1 (en) |
| TR (1) | TR27803A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0756031A2 (en) * | 1995-07-26 | 1997-01-29 | Franz Lässer AG | Thread guiding device for schiffli embroidery machine |
| EP0906982A2 (en) | 1997-10-03 | 1999-04-07 | Hiraoka Kogyo Co. Ltd. | Embroidery/lace machine |
| EP1209273A2 (en) * | 2000-11-21 | 2002-05-29 | Franz Lässer AG | Stitch forming process for an embroidery machine and embroidery machine for performing said process |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0795638B1 (en) * | 1996-03-15 | 1999-07-21 | Franz Lässer AG | Method and apparatus for forming the stitch in a Schiffli embroidery machine |
| DE50100006D1 (en) * | 2000-05-31 | 2002-07-18 | Franz Laesser Ag Diepoldsau | embroidery machine |
| DE10130345A1 (en) * | 2001-06-27 | 2003-01-09 | Zsk Stickmasch Gmbh | Depending on the thread tension controlled thread drive mechanism |
| EP1624100B1 (en) | 2004-08-04 | 2006-10-11 | Lässer AG | Stand for embroidery machine and its use with a stand foundation |
| JP2008214837A (en) * | 2007-02-08 | 2008-09-18 | Miyagi Lace Co Ltd | Embroidery lace, embroidery lace fabric, and their method |
| CN113373613A (en) * | 2021-06-11 | 2021-09-10 | 诸暨逸绣科技有限公司 | Automatic thread amount calculation method for sewing equipment and conveying system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE401265C (en) * | 1924-08-30 | Vogtlaendische Maschinenfabrik | Device for achieving an even thread tension on embroidery machines | |
| CH96452A (en) * | 1922-05-09 | 1922-10-16 | Rogg Bernhard | Shuttle embroidery machine with control for lockstitch and satin stitch. |
| US3460495A (en) * | 1967-05-29 | 1969-08-12 | Walter L Cobb | Method for embroidering tufts |
| AT370144B (en) * | 1979-02-20 | 1983-03-10 | August Heinzle | DEVICE FOR FEEDING AND TOWING THE THREAD ON TEXTILE MACHINES |
| US4308812A (en) * | 1980-03-17 | 1982-01-05 | Harry Lenson | Embroidery machine having improved thread supply system |
| DD213705A1 (en) * | 1983-02-23 | 1984-09-19 | Plauener Spitze Veb | THREAD TENSIONING AND WEARING DEVICE FOR EMBROIDERY MACHINES |
| CH659499A5 (en) * | 1983-06-16 | 1987-01-30 | Saurer Ag Adolph | SWITCHABLE BRAKE DEVICE FOR THE THREADS OF AN EMBROIDERY MACHINE. |
| DE3564829D1 (en) * | 1985-03-02 | 1988-10-13 | Motema Textilmaschinen Gmbh | Embroidering machine with shuttles |
| DE3836472C2 (en) * | 1987-10-31 | 1995-08-17 | Juki Kk | Upper thread feed mechanism for sewing machines |
-
1994
- 1994-02-04 DE DE4403365A patent/DE4403365A1/en not_active Withdrawn
- 1994-11-10 AT AT94117733T patent/ATE152789T1/en not_active IP Right Cessation
- 1994-11-10 DE DE59402665T patent/DE59402665D1/en not_active Ceased
- 1994-11-10 EP EP94117733A patent/EP0666351B1/en not_active Expired - Lifetime
- 1994-12-13 TR TR01292/94A patent/TR27803A/en unknown
-
1995
- 1995-02-01 JP JP7015378A patent/JPH0835162A/en active Pending
- 1995-02-04 KR KR1019950002002A patent/KR950032807A/en active IP Right Grant
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0756031A2 (en) * | 1995-07-26 | 1997-01-29 | Franz Lässer AG | Thread guiding device for schiffli embroidery machine |
| EP0906982A2 (en) | 1997-10-03 | 1999-04-07 | Hiraoka Kogyo Co. Ltd. | Embroidery/lace machine |
| EP1209273A2 (en) * | 2000-11-21 | 2002-05-29 | Franz Lässer AG | Stitch forming process for an embroidery machine and embroidery machine for performing said process |
Also Published As
| Publication number | Publication date |
|---|---|
| KR950032807A (en) | 1995-12-22 |
| EP0666351A1 (en) | 1995-08-09 |
| JPH0835162A (en) | 1996-02-06 |
| ATE152789T1 (en) | 1997-05-15 |
| DE59402665D1 (en) | 1997-06-12 |
| TR27803A (en) | 1995-08-29 |
| DE4403365A1 (en) | 1995-08-10 |
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