EP1489214A1 - Thread stop motion device and bar - Google Patents

Thread stop motion device and bar Download PDF

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Publication number
EP1489214A1
EP1489214A1 EP03405433A EP03405433A EP1489214A1 EP 1489214 A1 EP1489214 A1 EP 1489214A1 EP 03405433 A EP03405433 A EP 03405433A EP 03405433 A EP03405433 A EP 03405433A EP 1489214 A1 EP1489214 A1 EP 1489214A1
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EP
European Patent Office
Prior art keywords
magnet
thread
thread monitor
monitor according
switching plate
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Granted
Application number
EP03405433A
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German (de)
French (fr)
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EP1489214B1 (en
Inventor
Franz Lässer
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Franz Laesser AG
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Franz Laesser AG
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Filing date
Publication date
Application filed by Franz Laesser AG filed Critical Franz Laesser AG
Priority to DE50301194T priority Critical patent/DE50301194D1/en
Priority to EP03405433A priority patent/EP1489214B1/en
Priority to AT03405433T priority patent/ATE304624T1/en
Priority to KR1020040043908A priority patent/KR100643219B1/en
Priority to CN200410049519A priority patent/CN100582345C/en
Publication of EP1489214A1 publication Critical patent/EP1489214A1/en
Application granted granted Critical
Publication of EP1489214B1 publication Critical patent/EP1489214B1/en
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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
    • D05C11/14—Stop motions responsive to thread tension or breakage

Definitions

  • EP 0 894 886 proposes the force in order to prevent the switching lamella from fluttering use a spring that counteracts the thread tension. Will continue proposed the flutter movement by a movement-dependent force, i.e. one Power from an aerodynamic, hydrodynamic or electrodynamic Dampen effect.
  • An exemplary embodiment shows one on the shift plate attached damping wing, which by its movement in a gaseous or liquid medium triggers vortex. It is also proposed a magnetic field to create eddy currents in the damping wing and thereby one Trigger braking effect. In practice, however, these measures have failed proven. The stress on the springs is so great that they break relatively quickly. Also, thread monitors for high-speed machines don't just have to counteract Vibrations are largely insensitive, but must also respond quickly. The switch plates should therefore have the lowest possible mass. With the Attaching damping wings, however, does the opposite.
  • EP 1 098 025 describes an advantageous construction of a thread monitor bar a variety of thread monitors.
  • a thread monitor of the type mentioned above is thereby characterized that the magnet acts on the lever arm with the eyelet.
  • the Switch plate can therefore have a very low mass, which is a short Response time allowed. On the other hand, it prevents or suppresses that of Magnet exerted force on the switch plate a flutter of the switch plate.
  • the magnet can in the slot of a receiving part, e.g. be made of plastic. It can a scale shows the position of the magnet.
  • electromagnets are used, means can be provided for the To regulate current for the electromagnet.
  • the invention also relates to a thread monitor bar for embroidery or quilting machines with a plurality of thread monitors according to one of claims 1 to 12.
  • Thread guard bar can have magnets on a common organ, which are jointly adjustable by actuating this organ.
  • the thread monitor bar shown in Figure 1 according to the known state of the Technology according to EP 1,098,025 has a large number of thread monitors Monitoring the thread tension in a variety of embroidery sites, e.g. one Schiffli.
  • Each thread monitor has one around an axis 11 pivotable switching plate 13, which consists of wire and two lever arms 15, 17 having.
  • On the lever arm 15 there is an eyelet 19 for receiving the needle thread educated.
  • On the lever arm 17 acts a spring 21, which strives to Switch plate 13 together with the gravity acting on it in the Bring drawn position where the lever arm 17 contact with the contact rail 18 makes. This generates an error signal to indicate thread breakage.
  • the switching lamella is replaced by the Tension in the needle thread 14 is kept high, as is dash-dotted in FIG is shown and thus prevents contact with the contact rail 18.
  • the magnet 23 is a permanent magnet. However, it would also be possible to use the magnet 23 to train as electromagnets. In this case, funds could also be provided to regulate the current for the electromagnet. So that from this generated magnetic field changed and thus also on the switching plate 13th exerted force.
  • the distance of the magnet 23 from the axis of rotation 11 of the switching plate 13 is adjustable.
  • the magnet 23 is one through a slot 25 Receiving part 27 slidable.
  • a scale 29 enables an exact placement of the Magnet 23.
  • the magnets 23 are with their receiving parts 27 on a common member 31 arranged, which in the exemplary embodiment shown by means of an adhesive film 33 is attached to the profile 35. But it would also be possible to use the common organ 33 in To be adjustable in the longitudinal direction or transversely thereto, so that the magnets 23 can be adjusted together by actuating this member 33.
  • the thread monitor has a switching lamella pivotably mounted about an axis 11 13, which sinks to the lower layer in the event of a thread break in order to receive an error signal produce.
  • the magnet 23 acts on the lever arm 15 with the eyelet 19, so that Response of the thread monitor is not solely dependent on the acceleration due to gravity. Since, in contrast to the prior art, no massive anchor is provided, speaks the switch plate on thread break very quickly.
  • the magnet 23 on the Switching lamella13 can be exerted according to the requirements of the processing yarns adjusted by moving the magnet in the slot 25 become.

Abstract

Yarn (14) passes through an eyelet at the end of a lever arm (15) and lifts it to prevent the other end (17) of the arm from engaging an electrical contact (18). The arm is loaded by a magnet (23) that acts directly on the arm (15) and reinforces the gravitational load. The magnet can be a permanent magnet and its position can be adjusted singly or in groups in the mounting. Alternatively an adjustable electro-magnet can be used.

Description

Die Erfindung betrifft einen Fadenwächter für Stick- oder Steppmaschinen, mit einer um eine Achse schwenkbar gelagerten Schaltlamelle mit ein oder zwei Hebelarmen, von welchen einer eine Oese zum Aufnehmen des Nadelfadens aufweist, und einem Magneten, welcher bestrebt ist, die Schaltlamelle entgegen der Fadenspannung zu verschwenken, um bei Fadenbruch ein Fehlersignal zu erzeugen.The invention relates to a thread monitor for embroidery or quilting machines, with a switching lamella pivoted about an axis with one or two lever arms, one of which has an eyelet for receiving the needle thread, and one Magnet, which strives to close the switch plate against the thread tension swivel to generate an error signal if the thread breaks.

Fadenwächter werden schon seit Jahrzehnten bei Stick- oder Steppmaschinen verwendet. So beschreibt beispielsweise die CH 597 080 einen Fadenwächter, bei welchem der zu überwachende Faden auf eine Schaltlamelle einwirkt, die in Abhängigkeit von der jeweiligen Spannung des Fadens die elektrische Verbindung zwischen zwei unter verschiedenen elektrischen Spannung stehenden Stangen herstellt oder unterbricht. In der Zwischenzeit ist die Arbeitsgeschwindigkeit von Stick- und Steppmaschinen stark erhöht worden. Dies hat zu Problemen geführt. So heisst es beispielsweise in der Firmenschrift ALGE Timing aus dem Jahre 1997, dass je schneller eine Maschine laufe, desto grösser die Gefahr sei, dass die Maschine vibriere. Vibrationen würden bei Fadenbruch verhindern, dass die Schaltlamelle guten Kontakt gebe, denn sie würden dauernd leicht hochgeschleudert. Untersuchungen mit dem Oszilloskop hätten gezeigt, dass wegen der Vibrationen kaum mehr auswertbare Fehlersignale zur Verfügung stünden. Ein weiterer Effekt verhindere ebenfalls ein störungsfreies Funktionieren des Fadenwächters. Werde nämlich die Schaltlamelle kurz vor der Fehlerabfrage scharf beschleunigt, könne es sein, dass ihre Energie trotz Fadenspannung ausreiche, um kurz Kontakt zu geben. In der Praxis ergebe dies eine unruhige Anzeige, d.h. auch ohne dass ein Fadenbruch bestehe, würden die Anzeigen unregelmässig aufleuchten. Es gebe zwar Schaltungen, welche die Möglichkeit solcher Störungen unterdrücken würden. Dies habe aber den Nachteil, dass sogenannte Schiffchenfehler, welche sich nur sporadisch melden, dadurch unterdrückt würden. Thread monitors have been used in embroidery or quilting machines for decades used. For example, CH 597 080 describes a thread monitor at which the thread to be monitored acts on a switch plate, which in Depending on the respective tension of the thread the electrical connection between two rods with different electrical voltage or pauses. In the meantime, the working speed of embroidery and Quilting machines have been greatly increased. This has caused problems. So it says for example in the company publication ALGE Timing from 1997 that the faster a machine is running, the greater the risk that the machine will vibrate. Vibrations would prevent the switch plate from making good contact if the thread breaks give, because they would be flung up easily all the time. Investigations with the Oscilloscope would have shown that due to the vibrations hardly evaluable Error signals would be available. Another effect also prevent one trouble-free functioning of the thread monitor. Become the switch plate accelerated sharply shortly before the error query, it could be that their energy despite Thread tension is sufficient to give short contact. In practice, this results in one troubled display, i.e. even without a thread break, the ads would light up irregularly. There are circuits that offer the possibility of such Would suppress interference. However, this has the disadvantage that so-called Boat errors, which only report sporadically, would be suppressed.

Weiter heisst es in der Beschreibung: "Was an der Schaltlamelle versäumt wird, kann mit keiner noch so raffinierten Elektronik wettgemacht werden."The description also says: "What can be missed on the switch plate can be compensated for with no sophisticated electronics. "

Um ein Flattern der Schaltlamelle zu vermeiden, schlägt die EP 0 894 886 vor, die Kraft einer Feder einzusetzen, welche der Fadenspannung entgegenwirkt. Weiter wird vorgeschlagen, die Flatterbewegung durch eine bewegungsabhängige Kraft, also einer Kraft aus einem aerodynamischen, hydrodynamischen oder elektrodynamischen Effekt zu dämpfen. So zeigt ein Ausführungsbeispiel einen an der Schaltlamelle angebrachten Dämpfungsflügel, der durch seine Bewegung in einem gasförmigen oder flüssigen Medium Wirbel auslöst. Weiter wird vorgeschlagen, ein Magnetfeld anzulegen, um im Dämpfungsflügel Wirbelströme zu erzeugen und dadurch einen Bremseffekt auszulösen. In der Praxis haben sich jedoch diese Massnahmen nicht bewährt. Die Beanspruchung der Federn ist so gross, dass sie relativ rasch brechen. Auch müssen Fadenwächter für schnellaufende Maschinen nicht nur gegen Vibrationen weitgehend unempfindlich sein, sondern müssen auch rasch ansprechen. Die Schaltlamellen sollten daher eine möglichst geringe Masse aufweisen. Mit dem Anbringen von Dämpfungsflügeln wird jedoch das Gegenteil erreicht.EP 0 894 886 proposes the force in order to prevent the switching lamella from fluttering use a spring that counteracts the thread tension. Will continue proposed the flutter movement by a movement-dependent force, i.e. one Power from an aerodynamic, hydrodynamic or electrodynamic Dampen effect. An exemplary embodiment shows one on the shift plate attached damping wing, which by its movement in a gaseous or liquid medium triggers vortex. It is also proposed a magnetic field to create eddy currents in the damping wing and thereby one Trigger braking effect. In practice, however, these measures have failed proven. The stress on the springs is so great that they break relatively quickly. Also, thread monitors for high-speed machines don't just have to counteract Vibrations are largely insensitive, but must also respond quickly. The switch plates should therefore have the lowest possible mass. With the Attaching damping wings, however, does the opposite.

In der DE 1,142,139 wird ein Fadenwächter beschrieben, der eine um eine Achse schwenkbar gelagerte Schaltlamelle mit zwei Hebelarmen aufweist. Ein Hebelarm besteht aus einem Drahtstück, an dessen freiem Ende eine Oese zur Aufnahme des Nadelfadens ausgebildet ist. Der andere Hebelarm ist als Bügel aus ferromagnetischem Werkstoff ausgebildet und dient als Anker, auf den ein Magnetstab einwirkt. Dazu heisst es, dass infolge der Verwendung eines Magnetfeldes das Ansprechen des Fadenwächters nicht bzw. nicht allein abhängig von der Erdbeschleunigung der Schaltlamelle wie bei bekannten Fadenwächtern sei und dass dementsprechend die Ansprechzeit, d.h. die Reaktionszeit vom Bruch des Fadens bis zum Abstellen der Maschine verkürzt werde. Es wird auch auf die Problematik hingewiesen, dass eine möglichst kurze Ansprechzeit gewünscht ist, andererseits aber bei dünnen synthetischen Garnen nur eine geringe Kraft auf den Faden ausgeübt werden sollte. Beim beschriebenen Fadenwächter kann durch Drehen des Magnetstabs das auf den Anker einwirkende Magnetfeld verändert werden, um so die Rückstellkraft der Schaltlamelle der Garnqualität anzupassen. Als nachteilig erweist sich jedoch die relativ grosse Masse der zweiteiligen Schaltlamelle bestehend aus Anker und Drahtstück, welche die Ansprechgeschwindigkeit vermindert. Den gleichen Nachteil hat auch der Fadenwächter gemäss der DE 41 42 078, bei dem an der Schaltlamelle ein Permanentmagnet angeordnet ist.A thread monitor is described in DE 1,142,139, one around an axis has pivotally mounted switching plate with two lever arms. A lever arm consists of a piece of wire with an eyelet at its free end for receiving the Needle thread is formed. The other lever arm is made of ferromagnetic as a bracket Material formed and serves as an anchor on which a magnetic rod acts. To it is said that due to the use of a magnetic field, the response of the Thread monitor not or not solely depending on the gravitational acceleration of the Switching lamella as with known thread monitors and that accordingly Response time, i.e. the reaction time from the break of the thread to the turning off of the Machine will be shortened. Attention is also drawn to the problem that a response time as short as possible is desired, but on the other hand with thin ones synthetic yarns should only exert a slight force on the thread. In the thread monitor described, this can be done by turning the magnetic rod Magnetic field acting on the armature can be changed so that the restoring force of the Adjust the control slat to the yarn quality. However, that proves to be disadvantageous relatively large mass of the two-part switching plate consisting of armature and Piece of wire that reduces the response speed. The same disadvantage also has the thread monitor according to DE 41 42 078, in which on the switch plate Permanent magnet is arranged.

In der EP 1 098 025 wird eine vorteilhafte Konstruktion einer Fadenwächterleiste mit einer Vielzahl von Fadenwächtern gezeigt.EP 1 098 025 describes an advantageous construction of a thread monitor bar a variety of thread monitors.

Es ist Aufgabe der vorliegenden Erfindung einen Fadenwächter bzw. eine Fadenwächterleiste zu schaffen, welche sich auch für Stick- und Steppmaschinen eignet, welche mit 600 und mehr Stichen pro Minute arbeiten.The object of the present invention is a thread monitor or a To create thread monitor bar, which is also suitable for embroidery and quilting machines suitable, which work with 600 and more stitches per minute.

Erfindungsgemäss ist ein Fadenwächter der eingangs erwähnten Gattung dadurch gekennzeichnet, dass der Magnet auf den Hebelarm mit der Oese wirkt. Die Schaltlamelle kann daher eine sehr geringe Masse aufweisen, welche eine kurze Reaktionszeit ermöglicht. Andererseits verhindert oder unterdrückt aber die vom Magnet auf die Schaltlamelle ausgeübte Kraft ein Flattern der Schaltlamelle.According to the invention, a thread monitor of the type mentioned above is thereby characterized that the magnet acts on the lever arm with the eyelet. The Switch plate can therefore have a very low mass, which is a short Response time allowed. On the other hand, it prevents or suppresses that of Magnet exerted force on the switch plate a flutter of the switch plate.

Vorteilhaft besteht die Schaltlamelle aus einem einzigen Drahtstück. Dies erlaubt eine kostengünstige Fertigung und erlaubt die Masse der Schaltlamelle gering zu halten.The switching plate advantageously consists of a single piece of wire. This allows one cost-effective production and allows the mass of the switch plate to be kept low.

Zweckmässigerweise ist die Schaltlamelle so angeordnet, dass die auf sie wirkende Magnetkraft durch die Erdanziehungskraft unterstützt wird.The switching plate is expediently arranged such that the one acting on it Magnetic force is supported by the gravitational pull.

Vorteilhaft ist der Magnet ein Permanentmagnet. Dies hat den Vorteil, dass keine Stromversorgung notwendig ist. Es ist aber auch möglich, einen Elektromagneten zu verwenden. Elektromagnete ermöglichen eine Variation der Feldstärke entsprechend den Bedürfnissen.The magnet is advantageously a permanent magnet. This has the advantage that none Power supply is necessary. But it is also possible to use an electromagnet use. Electromagnets allow the field strength to be varied accordingly the needs.

Vorteilhaft ist der Abstand des Magneten von der Drehachse der Schaltlamelle verstellbar. Dies ermöglicht eine Vergrösserung oder Verkleinerung der von der Schaltlamelle auf den Nadelfaden ausgeübten Kraft.The distance of the magnet from the axis of rotation of the switching plate is advantageous adjustable. This enables the enlargement or reduction of the size of the Switching lamella exerted on the needle thread.

Es ist aber auch möglich, Magneten in einem Schlitz verschiebbar zu lagern, um die von der Schaltlamelle auf den Nadelfaden ausgeübte Kraft zu verändern. Der Magnet kann im Schlitz eines Aufnahmeteils, z.B. aus Kunststoff verschiebbar sein. Dabei kann eine Skala die Stellung des Magneten anzeigen.But it is also possible to slidably support magnets in a slot around the to change the force exerted by the switch plate on the needle thread. The magnet can in the slot of a receiving part, e.g. be made of plastic. It can a scale shows the position of the magnet.

Es ist auch möglich, eine Konstruktion vorzusehen, bei der die Winkellage des Magneten veränderbar ist.It is also possible to provide a construction in which the angular position of the Magnet is changeable.

Werden Elektromagneten verwendet, können Mittel vorgesehen werden, um den Strom für den Elektromagneten zu regeln.If electromagnets are used, means can be provided for the To regulate current for the electromagnet.

Um ein Flattern der Schaltlamelle zu vermeiden, ist es zweckmässig, einen Anschlag zur Begrenzung des Ausschlags der Schaltlamelle vorzusehen.In order to avoid fluttering of the switch plate, it is advisable to make a stop to limit the deflection of the switch plate.

Die Erfindung betrifft auch eine Fadenwächterleiste für Stick- oder Steppmaschinen mit einer Vielzahl von Fadenwächtern nach einem der Ansprüche 1 bis 12. Eine solche Fadenwächterleiste kann Magnete auf einem gemeinsamen Organ aufweisen, welche durch Betätigung dieses Organs gemeinsam verstellbar sind.The invention also relates to a thread monitor bar for embroidery or quilting machines with a plurality of thread monitors according to one of claims 1 to 12. Such Thread guard bar can have magnets on a common organ, which are jointly adjustable by actuating this organ.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels beschrieben. Es zeigt:

Figur 1:
Die Seitenansicht einer Fadenwächterleiste gemäss dem Stand der Technik, wie er in der EP 1 098 025 offenbart wird,
Figur 2:
eine Seitenansicht der Fadenwächterleiste gemäss einem Ausführungsbeispiel der Erfindung und
Figur 3:
eine perspektivische Darstellung der Fadenwächterleiste von Figur 2.
The invention is described below using an exemplary embodiment. It shows:
Figure 1:
The side view of a thread monitor bar according to the prior art, as disclosed in EP 1 098 025,
Figure 2:
a side view of the thread monitor bar according to an embodiment of the invention and
Figure 3:
a perspective view of the thread monitor bar of Figure 2.

Die in Figur 1 dargestellte Fadenwächterleiste gemäss dem bekannten Stand der Technik nach der EP 1,098,025 besitzt eine Vielzahl von Fadenwächtern zur Ueberwachung der Fadenspannung in einer Vielzahl von Stickstellen, z.B. einer Schifflistickmaschine. Jeder Fadenwächter besitzt eine um eine Achse 11 verschwenkbare Schaltlamelle 13, welche aus Draht besteht und zwei Hebelarme 15,17 aufweist. Am Hebelarm 15 ist eine Oese 19 zur Aufnahme des Nadelfadens ausgebildet. Auf den Hebelarm 17 wirkt eine Feder 21, welche bestrebt ist, die Schaltlamelle 13 zusammen mit der auf sie wirkenden Schwerkraft in die eingezeichnete Lage zu bringen, wo der Hebelarm 17 Kontakt mit der Kontaktschiene 18 macht. Dadurch wird ein Fehlersignal erzeugt, um Fadenbruch anzuzeigen. Normalerweise wird im Betrieb der Stickmaschine die Schaltlamelle durch die Spannung im Nadelfaden 14 hochgehalten, wie dies in Figur 2 strichpunktiert dargestellt ist und somit einen Kontakt zur Kontaktschiene 18 verhindert.The thread monitor bar shown in Figure 1 according to the known state of the Technology according to EP 1,098,025 has a large number of thread monitors Monitoring the thread tension in a variety of embroidery sites, e.g. one Schiffli. Each thread monitor has one around an axis 11 pivotable switching plate 13, which consists of wire and two lever arms 15, 17 having. On the lever arm 15 there is an eyelet 19 for receiving the needle thread educated. On the lever arm 17 acts a spring 21, which strives to Switch plate 13 together with the gravity acting on it in the Bring drawn position where the lever arm 17 contact with the contact rail 18 makes. This generates an error signal to indicate thread breakage. Normally, when the embroidery machine is in operation, the switching lamella is replaced by the Tension in the needle thread 14 is kept high, as is dash-dotted in FIG is shown and thus prevents contact with the contact rail 18.

In Figuren 2 und 3 wird der Fadenwächter in der Stellung nach Fadenbruch gezeigt, wo der Hebelarm 17 Kontakt mit der Kontaktschiene 18 steht. Im Unterschied zu Fig. 1 fehlt die Feder 21, welche auf den Hebelarm 17 wirkt. Es ist aber ein Magnet 23 vorgesehen, welcher direkt auf den anderen Hebelarm 15 wirkt. Es ist aber nicht wie in der DE 1,142,139 ein Magnet beim kurzen Hebelarm vorgesehen und der kurze Hebelarm als separates Teil mit einer relativ grossen Masse ausgebildet, welche eine schnelle Reaktion der Schaltlamelle bei Fadenbruch verhindern würde. Vielmehr ist die Schaltlamelle 11 einstückig aus Draht aus einem ferromagnetischem Werkstoff gefertigt. In Figures 2 and 3 the thread monitor is shown in the position after thread break, where the lever arm 17 is in contact with the contact rail 18. In contrast to Fig. 1 missing the spring 21, which acts on the lever arm 17. But it is a magnet 23 provided, which acts directly on the other lever arm 15. But it's not like in DE 1,142,139 provides a magnet for the short lever arm and the short one Lever arm formed as a separate part with a relatively large mass, which a would prevent the switching lamella from reacting quickly if the thread breaks. Rather is the switching plate 11 in one piece from wire made of a ferromagnetic material manufactured.

Der Magnet 23 ist ein Permanentmagnet. Es wäre aber auch möglich, den Magneten 23 als Elektromagneten auszubilden. In diesem Fall könnten auch Mittel vorgesehen werden, um den Strom für den Elektromagneten zu regeln. Damit wird das von diesem erzeugte Magnetfeld verändert und somit auch die auf die Schaltlamelle 13 ausgeübte Kraft.The magnet 23 is a permanent magnet. However, it would also be possible to use the magnet 23 to train as electromagnets. In this case, funds could also be provided to regulate the current for the electromagnet. So that from this generated magnetic field changed and thus also on the switching plate 13th exerted force.

Der Abstand des Magneten 23 von der Drehachse 11 der Schaltlamelle 13 ist verstellbar. Zu diesem Zweck ist der Magnet 23 durch einen Schlitz 25 eines Aufnahmeteils 27 verschiebbar. Eine Skala 29 ermöglicht eine genaue Platzierung des Magneten 23.The distance of the magnet 23 from the axis of rotation 11 of the switching plate 13 is adjustable. For this purpose the magnet 23 is one through a slot 25 Receiving part 27 slidable. A scale 29 enables an exact placement of the Magnet 23.

Die Magnete 23 sind mit ihren Aufnahmeteilen 27 auf einem gemeinsamen Organ 31 angeordnet, welches beim gezeigten Ausführungsbeispiel mittels einer Klebefolie 33 am Profil 35 befestigt ist. Es wäre aber auch möglich, das gemeinsame Organ 33 in Längsrichtung oder quer dazu verstellbar auszugestalten, so dass die Magnete 23 durch Betätigung dieses Organs 33 gemeinsam verstellbar sind.The magnets 23 are with their receiving parts 27 on a common member 31 arranged, which in the exemplary embodiment shown by means of an adhesive film 33 is attached to the profile 35. But it would also be possible to use the common organ 33 in To be adjustable in the longitudinal direction or transversely thereto, so that the magnets 23 can be adjusted together by actuating this member 33.

Zusammenfassend kann folgendes festgehalten werden:In summary, the following can be stated:

Der Fadenwächter besitzt eine um eine Achse 11 schwenkbar gelagerte Schaltlamelle 13, welche bei Fadenbruch in die untere Lage absinkt, um ein Fehlersignal zu erzeugen. Der Magnet 23 wirkt auf den Hebelarm 15 mit der Oese 19, so dass das Ansprechen des Fadenwächters nicht allein von der Erdbeschleunigung abhängig ist. Da im Gegensatz zum Stand der Technik kein massiger Anker vorgesehen ist, spricht die Schaltlamelle auf Fadenbruch sehr rasch an. Die vom Magneten 23 auf die Schaltlamelle13 ausgeübte Kraft kann gemäss den Anforderungen des zu verarbeitenden Garns durch Verschieben des Magneten im Schlitz 25 angepasst werden.The thread monitor has a switching lamella pivotably mounted about an axis 11 13, which sinks to the lower layer in the event of a thread break in order to receive an error signal produce. The magnet 23 acts on the lever arm 15 with the eyelet 19, so that Response of the thread monitor is not solely dependent on the acceleration due to gravity. Since, in contrast to the prior art, no massive anchor is provided, speaks the switch plate on thread break very quickly. The magnet 23 on the Switching lamella13 can be exerted according to the requirements of the processing yarns adjusted by moving the magnet in the slot 25 become.

Claims (14)

Fadenwächter für Stick- oder Steppmaschinen, mit einer um eine Achse (11) schwenkbar gelagerten Schaltlamelle (13) mit ein oder zwei Hebelarmen (15,17), von welchen einer eine Oese (19) zur Aufnahme des Nadelfadens aufweist, und einem Magneten, welcher bestrebt ist, die Schaltlamelle (13) entgegen der Fadenspannung zu verschwenken, um bei Fadenbruch ein Fehlersignal zu erzeugen, dadurch gekennzeichnet, dass der Magnet (23) auf den Hebelarm (15) mit der Oese (19) wirkt.Thread monitor for embroidery or quilting machines, with a switching plate (13) pivotably mounted about an axis (11) with one or two lever arms (15, 17), one of which has an eyelet (19) for receiving the needle thread, and a magnet, which strives to pivot the switching plate (13) counter to the thread tension in order to generate an error signal when the thread breaks, characterized in that the magnet (23) acts on the lever arm (15) with the eyelet (19). Fadenwächter nach Anspruch 1, dadurch gekennzeichnet, dass die Schaltlamelle (13) aus einem einzigen Drahtstück besteht.Thread monitor according to claim 1, characterized in that the switching plate (13) consists of a single piece of wire. Fadenwächter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Schaltlamelle (13) so angeordnet ist, dass die auf sie wirkende Magnetkraft durch die Erdanziehungskraft unterstützt wird.Thread monitor according to claim 1 or 2, characterized in that the switching plate (13) is arranged so that the magnetic force acting on it is supported by the force of gravity. Fadenwächter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Magnet (23) ein Permanentmagnet ist.Thread monitor according to one of claims 1 to 3, characterized in that the magnet (23) is a permanent magnet. Fadenwächter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Magnet (23) ein Elektromagnet ist.Thread monitor according to one of claims 1 to 3, characterized in that the magnet (23) is an electromagnet. Fadenwächter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Abstand zwischen dem Magneten (23) und der Schaltlamelle (13) verstellbar ist.Thread monitor according to one of claims 1 to 5, characterized in that the distance between the magnet (23) and the switching plate (13) is adjustable. Fadenwächter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Abstand des Magneten von der Drehachse (11) der Schaltlamelle (13) verstellbar ist. Thread monitor according to one of claims 1 to 5, characterized in that the distance of the magnet from the axis of rotation (11) of the switching plate (13) is adjustable. Fadenwächter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Magnet in einem Schlitz (25) verschiebbar gelagert ist.Thread monitor according to one of claims 1 to 7, characterized in that the magnet is slidably mounted in a slot (25). Fadenwächter nach Anspruch 8, dadurch gekennzeichnet, dass der Magnet (23) im Schlitz (25) eines Aufnahmeteils (17) verschiebbar ist.Thread monitor according to claim 8, characterized in that the magnet (23) in the slot (25) of a receiving part (17) is displaceable. Fadenwächter nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Winkellage des Magneten (23) veränderbar ist.Thread monitor according to one of claims 1 to 8, characterized in that the angular position of the magnet (23) is variable. Fadenwächter nach einem der Ansprüche 5 bis 10, dadurch gekennzeichnet, dass Mittel vorgesehen sind, um den Strom für den Elektromagneten (23) zu regeln.Thread monitor according to one of claims 5 to 10, characterized in that means are provided to regulate the current for the electromagnet (23). Fadenwächter nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass ein Anschlag zur Begrenzung des Ausschlags der Schaltlamelle vorgesehen ist.Thread monitor according to one of claims 1 to 11, characterized in that a stop is provided to limit the deflection of the switching plate. Fadenwächterleiste für Stick- oder Steppmaschinen, mit einer Vielzahl von Fadenwächtern nach einem der Ansprüche 1 bis 12.Thread monitor bar for embroidery or quilting machines, with a variety of Thread monitor according to one of claims 1 to 12. Fadenwächterleiste nach Anspruch 13, dadurch gekennzeichnet, dass Magnete auf einem gemeinsamen Organ (31) angeordnet und durch Betätigung dieses Organs gemeinsam verstellbar sind.Thread monitor bar according to claim 13, characterized in that magnets are arranged on a common organ (31) and are jointly adjustable by actuating this organ.
EP03405433A 2003-06-16 2003-06-16 Thread stop motion device and bar Expired - Lifetime EP1489214B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE50301194T DE50301194D1 (en) 2003-06-16 2003-06-16 Thread monitor and thread monitor strip
EP03405433A EP1489214B1 (en) 2003-06-16 2003-06-16 Thread stop motion device and bar
AT03405433T ATE304624T1 (en) 2003-06-16 2003-06-16 THREAD WATCH AND THREAD WATCH BAR
KR1020040043908A KR100643219B1 (en) 2003-06-16 2004-06-15 Thread guard and thread guard strip
CN200410049519A CN100582345C (en) 2003-06-16 2004-06-16 Thread stop device and its bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03405433A EP1489214B1 (en) 2003-06-16 2003-06-16 Thread stop motion device and bar

Publications (2)

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EP1489214A1 true EP1489214A1 (en) 2004-12-22
EP1489214B1 EP1489214B1 (en) 2005-09-14

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EP03405433A Expired - Lifetime EP1489214B1 (en) 2003-06-16 2003-06-16 Thread stop motion device and bar

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EP (1) EP1489214B1 (en)
KR (1) KR100643219B1 (en)
CN (1) CN100582345C (en)
AT (1) ATE304624T1 (en)
DE (1) DE50301194D1 (en)

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CN103922193A (en) * 2014-04-17 2014-07-16 郎溪和心化纤织造有限公司 Automatic yarn breakage alarm device of yarn reeling machine
DE102015011682A1 (en) * 2015-09-05 2017-03-09 Saurer Ag Shuttle embroidery machine with improved detection of shuttle breakage

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Publication number Priority date Publication date Assignee Title
CN104088064A (en) * 2014-07-31 2014-10-08 安徽华茂纺织股份有限公司 Tension warp stop hook device of air jet loom
CN107956013B (en) * 2016-08-18 2019-12-31 刘慧� Broken yarn protection method for spinning frame
CN110592834B (en) * 2019-09-19 2021-09-07 浙江信胜科技股份有限公司 Pearl embroidery machine send pearl mechanism and pearl embroidery machine

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DE4142078A1 (en) * 1991-01-04 1992-07-09 Benninger Ag Maschf Yarn tension regulator - has bow spring tension and sensor to indicate loss of yarn, not affected by dust and lint
EP0894886A1 (en) * 1997-07-31 1999-02-03 Franz Lässer AG Method for monitoring thread tension, thread stop-motion device and stop-motion bar
US20030000439A1 (en) * 2001-06-15 2003-01-02 Brother Kogyo Kabushiki Kaisha Thread breakage detection device for sewing machine

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
DE4142078A1 (en) * 1991-01-04 1992-07-09 Benninger Ag Maschf Yarn tension regulator - has bow spring tension and sensor to indicate loss of yarn, not affected by dust and lint
EP0894886A1 (en) * 1997-07-31 1999-02-03 Franz Lässer AG Method for monitoring thread tension, thread stop-motion device and stop-motion bar
US20030000439A1 (en) * 2001-06-15 2003-01-02 Brother Kogyo Kabushiki Kaisha Thread breakage detection device for sewing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103922193A (en) * 2014-04-17 2014-07-16 郎溪和心化纤织造有限公司 Automatic yarn breakage alarm device of yarn reeling machine
DE102015011682A1 (en) * 2015-09-05 2017-03-09 Saurer Ag Shuttle embroidery machine with improved detection of shuttle breakage

Also Published As

Publication number Publication date
CN100582345C (en) 2010-01-20
ATE304624T1 (en) 2005-09-15
KR100643219B1 (en) 2006-11-10
CN1572949A (en) 2005-02-02
KR20040111050A (en) 2004-12-31
DE50301194D1 (en) 2005-10-20
EP1489214B1 (en) 2005-09-14

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