EP3066247B1 - Device for monitoring the schiffli thread on a large or small schiffli embroidery machine - Google Patents

Device for monitoring the schiffli thread on a large or small schiffli embroidery machine Download PDF

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Publication number
EP3066247B1
EP3066247B1 EP14796666.7A EP14796666A EP3066247B1 EP 3066247 B1 EP3066247 B1 EP 3066247B1 EP 14796666 A EP14796666 A EP 14796666A EP 3066247 B1 EP3066247 B1 EP 3066247B1
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EP
European Patent Office
Prior art keywords
thread
contact element
embroidery machine
machine according
contact
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EP14796666.7A
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German (de)
French (fr)
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EP3066247A1 (en
Inventor
Roman LÄSSER
Jürgen TÜRTSCHER
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Laesser AG
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Laesser AG
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Publication of EP3066247A1 publication Critical patent/EP3066247A1/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

  • the invention relates to a device for monitoring the Schifflifadens on a large or small Schifflistickmaschine according to the preamble of patent claim 1.
  • Such a device has many disadvantages, because in the area of the Schifflifadens below the throat plate caused by the multiple friction of the upper and lower threads unavoidable lint, which after a short time the optics, whether it is the mirror or the light source with which Light beam is generated, cover, so that their effect is lost. Deposits on these sensor elements can no longer be achieved with reliable results. Furthermore, a disadvantage is that the mostly very thin used to be used Schifflifäden consist of materials that are optically difficult to detect and detectable, for example, when white or transparent threads are used. Another disadvantage of this device is that even miniaturized optical elements require relatively much space and also need to be powered by power cables with energy. Such custom-made miniaturized sensor elements are They are also very expensive and have to be individually supplied with energy. Considering that several hundred to more than a thousand ships have to be monitored simultaneously on a ship's embroidery machine, this is hardly economically feasible.
  • An object of the present invention is therefore to provide a device for monitoring the Schifflifadens, which does not have the disadvantages of the two known devices and in particular ensures a reliable control over the presence of Schifflifaden.
  • this device can monitor every single embroidery point, that is, every single Schifflifaden and stop the embroidery machine at a yarn breakage or when used Schifflifaden or empty bobbin and after elimination of the cause of the thread break or after replacement of the emptied shuttle against a full to continue the embroidery operation at the point of interruption.
  • the device can be produced inexpensively, since the pin for controlling the device only an electrical connection, that is a fine wire, must be provided.
  • the inventive device has a further advantage over conventional monitoring elements, as it monitors itself.
  • the pins are very thin springs, for example, at 700 stitching / min. Millions of bites and thus deflections must endure, even endangered by a fatigue break. Should a fatigue fracture of a contact pin occur, this break also immediately triggers an error message and the machine shuts down or is stopped. Faulty stitches due to yarn breakage can therefore not be undetected because self-monitoring does not allow uncontrolled embroidery marks.
  • tap hole plate 1 on a large embroidery machine carries on its back four Schifflibahnen 3, also called Stöckli.
  • an intermediate plate 5 ( Fig. 3 ) made of a non-conductive, but good sliding properties having material.
  • the Schifflibahnen 3 are large embroidery machines by about 15 ° inclined to the vertical, so that the sliding Schiffli 9 rest with their sole by their weight on the smooth surface of the Schiffli 3.
  • FIG. 1 shows Schiffli in the lowest position and resting on the lower driver pin 8.
  • FIG. 2 is also the bottom or inside of the intermediate plate 5 visible.
  • groove-shaped slots 17 are shown, in which also in FIG. 2 between the tap hole plate 1 and the intermediate plate 5 shown, for example, consisting of spring wire pins 19 can be inserted.
  • Each contact pin 19 essentially has a shape of a "U” placed to the side, as well as the slots 17 receiving it.
  • the upper leg 19 '(FIG. FIGS. 1 . 2 . 5 ) of the contact pin 19 leaves the slot 17 and projects beyond it and crosses the recess 11 in the intermediate plate 5.
  • the contact pin 19 is thus within the cross section of the intermediate plate 5, ie between the top and bottom.
  • the contact pin 19 is preferably made of spring steel and bent such that the upper leg 19 'or its end when the tap hole plate 1 is connected to the intermediate plate 5 and the underlying Schifflibahn 3 by the screws 7, abuts the Schifflibahn 3.
  • the overhead leg 19 'of the contact pin 19 is thus in the path of the Schifflifadens 23, which leads from the eyelet 21 on Schiffli 9 to the stitch hole 13 in the tap hole plate 1, when the Schiffli 9 after passing through the thread loop 22 of the upper thread down to the starting position as in the FIGS. 1 . 2 and 6 represented is performed.
  • loop strings 23 are consumed, albeit minimally.
  • the force exerted by the strained Schifflifaden 23 on the contact pin 19 and the legs 19 'of the contact pin 19 is sufficient to deflect the leg 19' slightly, so that its end 19 "lifts from the contact position with the surface of the metallic shuttle track 3 and no electrical contact
  • the leg 19 'of the contact pin 19 generates during deflection by the Schifflifaden 23 deformation of the long, acting as a spring element base leg of the U-shaped contact pin 19 of a cover 20, which serves as insulation against the needle plate 1 in the With this arrangement, it is possible, by simply inserting into the slot 17, covering with the cover or a suitable film (not shown) and then joining the tap hole plate 1 with the intermediate plate 5 and the Schifflibahen 3 the contact pin or to hold the contact pins properly 19.
  • the end 19 'of the Contact pin 19 opposite end 31 of the contact pin 19 is connected to a wire with the machine control (wire not shown).
  • the position of the leg 19 'of the contact pin 19 can also be arranged such that at the correct thread tension of the Schifflifadens 23 of the leg 19' is deflected by the Schifflifaden 23 so that it comes into contact with the tap hole plate 1. In this case, therefore, means that an electrical connection from the taphole plate 1 to the controller represents a fault-free operation and an interruption of the connection is an error message, which leads to a machine stop.
  • the contact pin 19 consists of a straight running wire, preferably spring wire or a metal strip as a contact pin 19 which at the back of the Schifflibahn 3 and / or attached to the back of the intermediate plate 5 and is held resiliently.
  • the rear end of the contact pin 19 is connected to a connector 25.
  • the plug-in coupling 25 (see Figures 3 and 4 ) serves to make an electrically conductive connection with a wire for transmitting state to the controller of the Schifflitickmaschine.
  • the connector 25 according to the Figures 3 and 4 is fastened by means of a screw 27, on the shank of which the rear end or the lower leg of the contact pin 19 is fastened. In a preferred embodiment of the attachment of the contact pin 19 this wraps around the shaft 29 partially and is firmly connected to the shaft 29, for example, welded.
  • the rear end of the contact pin 19 preferably made of spring wire may also be wound several times around the shaft 29 to hold the rectilinear portion of the contact pin 19 resiliently biased by the recess 11 to a contact plate 18 with conductive connection to the tap hole plate 1.
  • the plug-in coupling 25, which is fixedly connected to the shaft 29, further serves to make the clamping force of the contact pin 19 adjustable and thus to be able to adjust the sensitivity of the thread monitor ( Figures 3 and 5 ).
  • a locking element 37 is formed with different locking positions on the connector 25.
  • the contact pin 19 may be formed such that at correct thread tension contact to the tap hole plate 1 and in the absence of tension the contact pin 19 is at rest from the tap hole plate 1 is removed and does not make contact.

Description

Gegenstand der Erfindung ist eine Vorrichtung zur Überwachung des Schifflifadens auf einer Gross- oder Klein-Schifflistickmaschine gemäss Oberbegriff des Patentanspruchs 1.The invention relates to a device for monitoring the Schifflifadens on a large or small Schifflistickmaschine according to the preamble of patent claim 1.

Vorrichtungen zur Überwachung der Fäden an Stickmaschinen, insbesondere Schifflistickmaschinen, sind in vielen Ausführungen bekannt. Sie werden auch als Vorrichtung zur Überwachung von Fadenbruch bezeichnet. Das Überwachen der Nadelfäden an Schifflistickmaschinen ist heute Standard, da auf der Seite der Nadel über der Vorderseite der Stichlochplatte sehr viel Raum für eine Vorrichtung zur Überwachung des Fadens, der von einer Grossspule herangeführt wird, zur Verfügung steht und folglich fast beliebig ausgebildete mechanische oder elektromechanische Detektoren auf dem Markt sind.
Die Überwachung des Schifflifadens, welcher mit dem Schiffli durch die Fadenschlaufe des Nadelfadens auf der Rück- oder Hinterseite der Stichlochplatte geführt wird, ist aus vielen Gründen sehr schwierig. Insbesondere steht dem Konstrukteur im Wesentlichen kein freier Raum zur Verfügung, um eine entsprechende zuverlässige Vorrichtung zwischen der Schifflibahn und der Stichlochplatte anordnen zu können. Der dort verfügbare Raum ist für das Schiffli reserviert.Devices for monitoring the threads on embroidery machines, in particular Schifflistickmaschinen, are known in many designs. They are also referred to as a device for monitoring thread breakage. The monitoring of the needle threads on Schifflitickmaschinen is standard today, as on the side of the needle over the front of the needle plate much space for a device for monitoring the thread, which is brought from a large coil, is available and therefore almost arbitrarily formed mechanical or electromechanical Detectors are in the market.
The monitoring of the Schifflifadens, which is guided with the Schiffli through the thread loop of the needle thread on the back or rear side of the needle plate, is very difficult for many reasons. In particular, the designer is essentially no free space available to order a corresponding reliable device between the Schifflibahn and the tap hole plate can. The space available there is reserved for the Schiffli.

Mit dem Einzug der Elektronik im Stickmaschinenbereich wird in der EP 1 013 814 eine Schifflifaden-Überwachung offenbart, bei welcher im Bereich der Schiffliführungsbahn zwischen dem Stickloch und dem Schiffli Sensoren angeordnet sind, welche das Vorhandensein des Hinterfadens (das heisst des Schifflifadens) in diesem Bereich überwachen. Zwei Sensoren sind so angeordnet, dass sie sich gegenüberliegen und der zu überwachende Faden berührungsfrei zwischen den beiden Elementen hindurchläuft. In einer Ausführungsform wird dort vorgeschlagen, einen Lichtstrahl an einem Spiegel zu reflektieren, wenn er den Fadenlauf durchquert hat. Eine solche Vorrichtung ist mit vielen Nachteilen behaftet, denn im Bereich des Schifflifadens unterhalb der Stichplatte entstehen durch die mehrfache Reibung der Ober- und Unterfäden nicht vermeidbare Flusen, welche nach kurzer Zeit die Optik, sei es nun der Spiegel oder die Lichtquelle, mit welcher ein Lichtstrahl erzeugt wird, bedecken, so dass deren Wirkung verloren geht. Durch Ablagerungen auf diesen Sensorelementen können keine zuverlässigen Resultate mehr erreicht werden. Im Weiteren besteht ein Nachteil darin, dass die meist sehr dünnen zum Einsatz gelangenden Schifflifäden aus Materialien bestehen, die optisch schlecht erfassbar und detektierbar sind, zum Beispiel wenn weisse oder transparente Fäden verwendet werden. Ein weiterer Nachteil dieser Vorrichtung besteht darin, dass auch miniaturisierte optische Elemente verhältnismässig viel Raum benötigen und zudem über Stromkabel mit Energie versorgt werden müssen. Solche speziell angefertigte miniaturisierte Sensorelemente sind zudem sehr kostspielig und müssen einzeln mit Energie versorgt werden. Wenn man bedenkt, dass auf einer Schifflistickmaschine mehrere hundert bis über tausend Schiffli gleichzeitig überwacht werden müssen, ist dies wirtschaftlich kaum realisierbar.With the introduction of electronics in the embroidery machine area is in the EP 1 013 814 discloses a Schifflifaden monitoring in which are arranged in the region of the Schiffliführungsührungsbahn between the embroidery hole and the Schiffli sensors which monitor the presence of the back thread (that is, the Schifflifadens) in this area. Two sensors are arranged so that they face each other and the thread to be monitored passes without contact between the two elements. In one embodiment, it is proposed there to reflect a light beam on a mirror when it has traversed the yarn path. Such a device has many disadvantages, because in the area of the Schifflifadens below the throat plate caused by the multiple friction of the upper and lower threads unavoidable lint, which after a short time the optics, whether it is the mirror or the light source with which Light beam is generated, cover, so that their effect is lost. Deposits on these sensor elements can no longer be achieved with reliable results. Furthermore, a disadvantage is that the mostly very thin used to be used Schifflifäden consist of materials that are optically difficult to detect and detectable, for example, when white or transparent threads are used. Another disadvantage of this device is that even miniaturized optical elements require relatively much space and also need to be powered by power cables with energy. Such custom-made miniaturized sensor elements are They are also very expensive and have to be individually supplied with energy. Considering that several hundred to more than a thousand ships have to be monitored simultaneously on a ship's embroidery machine, this is hardly economically feasible.

Aus der CH 448 699 ist eine weitere Vorrichtung zur Überwachung der Schifflifäden bekannt. Um das Problem bzw. die Schwierigkeit der direkten Überwachung des Schifflifadens zwischen dem Schiffli bzw. der darin liegenden Bobine und dem Stickgut zu beheben, wird vorgeschlagen, das Aufliegen eines Schifflis auf dem unteren Treiberstift zu überwachen. Es wird davon ausgegangen, dass bei Fadenbruch das Schiffli vorzeitig auf dem unteren Treiberfinger aufliegt, weil durch den nicht mehr vorhandenen Faden das Schiffli nicht durch den Fadenauszug beim Nach-unten-Fahren gebremst wird. Mit anderen Worten, das Schiffli gelangt ungebremst früher in Kontakt mit dem unteren Treiberfinger, wenn kein Fadenauszug erfolgt oder der Faden der Bobine aufgebraucht ist, als im Falle, wenn beim Nach-unten-Fahren des Schifflis der Faden abgezogen und das Schiffli gebremst wird. Es handelt sich hier also um eine indirekte Feststellung, ob Fadenbruch vorliegt oder nicht. Durch nicht vermeidbare Verschleisserscheinungen oder Verschmutzung der Schifflibahn und/oder des Schifflis kann aber auch ohne Fadenbruch das Schiffli gebremst werden und dann kein Fadenbruch angezeigt werden. Es handelt sich somit nicht um eine sichere Erkennung, ob Faden vorhanden ist oder nicht.From the CH 448 699 is another device for monitoring the Schifflifäden known. To remedy the problem or the difficulty of direct monitoring of the Schifflifadens between the Schiffli or lying therein reel and the embroidery material, it is proposed to monitor the resting of a Schifflis on the lower driver pin. It is assumed that in case of yarn breakage, the Schiffli rests prematurely on the lower driver finger, because the Schiffli is not slowed down by the thread extraction when driving downwards by the no longer existing thread. In other words, the ship comes unchecked sooner in contact with the lower driver finger when no thread extraction occurs or the thread of the reel is used up, as in the case when pulled down when driving down the Schifflis the thread and the Schiffli is braked. So this is an indirect statement as to whether there is thread breakage or not. Due to unavoidable signs of wear or contamination of the Schifflibahn and / or Schifflis but can be braked without thread break Schiffli and then no thread break are displayed. It is therefore not a sure detection, whether thread is present or not.

Eine Aufgabe der vorliegenden Erfindung besteht nun darin, eine Vorrichtung zur Überwachung des Schifflifadens zu schaffen, welche die Nachteile der beiden bekannten Vorrichtungen nicht aufweist und insbesondere eine zuverlässige Kontrolle über die Anwesenheit von Schifflifaden gewährleistet.An object of the present invention is therefore to provide a device for monitoring the Schifflifadens, which does not have the disadvantages of the two known devices and in particular ensures a reliable control over the presence of Schifflifaden.

Gelöst wird diese Aufgabe durch eine Vorrichtung gemäss den Merkmalen des Patentanspruchs 1. Vorteilhafte Ausgestaltungen der Vorrichtungen werden in den abhängigen Ansprüchen umschrieben.
Hiermit gelingt es auf einwandfreie und sichere Weise durch die direkte Überwachung der Fadenspannung zwischen der Fadenöse am Schiffli und dem Stichloch in der Stichlochplatte, bzw. dem Stickgut, das Vorhandensein von Schifflifaden zu überwachen. Die Vorrichtung kann nicht durch Flusen oder andere Verunreinigungen ausser Betrieb gesetzt werden und besteht einzig aus einem länglichen oder drahtförmigen Element, welches quer zum Lauf des Schifflifadens liegt und von diesem seitlich verdrängt wird, wenn die Fadenzufuhr und Fadenspannung korrekt ist. Es ist mit dieser Vorrichtung einfach möglich, jede einzelne Stickstelle, das heisst jeden einzelnen Schifflifaden zu überwachen und bei einem Fadenbruch oder bei aufgebrauchtem Schifflifaden oder leerer Bobine, die Stickmaschine anzuhalten und nach Behebung der Ursache des Fadenbruchs oder nach Austausch des geleerten Schiffchens gegen ein volles, den Stickbetrieb an der Stelle des Unterbruchs weiterzuführen. Die Vorrichtung ist kostengünstig herstellbar, da vom Stift zur Steuerung der Vorrichtung einzig eine elektrische Verbindung, das heisst ein feiner Draht, vorgesehen sein muss. Um die Vorrichtung noch kostengünstiger herzustellen, ist es auch möglich, eine Mehrzahl von Stiften, zum Beispiel in einem Modul von mehreren Stickstellen zusammenzufassen und einen Fadenbruch von einem der Fäden im Modul über eine einzige elektrische Verbindung an die Steuerung zu melden. Es sind dazu keine elektronischen Geräte an den Stickstellen notwendig und die Steuerung wird mit dem Signal Strom "ein" oder Strom "aus" auf den Fadenbruch aufmerksam gemacht.This object is achieved by a device according to the features of claim 1. Advantageous embodiments of the devices are described in the dependent claims.
This manages to properly and safely by the direct monitoring of the thread tension between the eyelet on Schiffli and the tap hole in the tap hole plate, or the embroidery to monitor the presence of Schifflifaden. The device can not be put out of action by fluff or other impurities and consists solely of an elongated or wire-shaped element, which is transverse to the barrel of the boat and laterally displaced by this, if the thread supply and thread tension is correct. It is easily possible with this device to monitor every single embroidery point, that is, every single Schifflifaden and stop the embroidery machine at a yarn breakage or when used Schifflifaden or empty bobbin and after elimination of the cause of the thread break or after replacement of the emptied shuttle against a full to continue the embroidery operation at the point of interruption. The device can be produced inexpensively, since the pin for controlling the device only an electrical connection, that is a fine wire, must be provided. In order to make the device even more cost effective, it is also possible to combine a plurality of pins, for example in a module of several embroidery sites and to report a yarn breakage of one of the threads in the module via a single electrical connection to the controller. There are no electronic devices to the embroidery points necessary and the controller is made aware of the thread break with the signal power "on" or power "off".

Die erfindungsgemässe Vorrichtung hat einen weiteren Vorteil gegenüber herkömmlichen Überwachungselementen, da sie sich selbst überwacht. Die Kontaktstifte sind sehr dünne Federn, die beispielsweise bei 700 Stichbildungen/Min. Millionen von Stichen und damit Auslenkungen über sich ergehen lassen müssen, auch durch einen Ermüdungsbruch gefährdet. Sollte ein Ermüdungsbruch eines Kontaktstifts eintreten, so löst auch dieser Bruch sofort eine Fehlermeldung aus und die Maschine stellt ab bzw. wird gestoppt. Fehlstiche durch Fadenbruch können somit nicht undetektiert auftreten, weil die Selbstüberwachung keine unkontrollierten Stickstellen zulässt.The inventive device has a further advantage over conventional monitoring elements, as it monitors itself. The pins are very thin springs, for example, at 700 stitching / min. Millions of bites and thus deflections must endure, even endangered by a fatigue break. Should a fatigue fracture of a contact pin occur, this break also immediately triggers an error message and the machine shuts down or is stopped. Faulty stitches due to yarn breakage can therefore not be undetected because self-monitoring does not allow uncontrolled embroidery marks.

Anhand illustrierter Ausführungsbeispiele wird die Erfindung näher erläutert. Es zeigen:

Figur 1
Eine perspektivische Darstellung des Moduls in Figur 2 in Explosionsdarstellung,
Figur 2
eine Darstellung eines Moduls mit vier Schifflibahnen, vorne die Stichlochplatte, in Explosionsdarstellung,
Figur 3
in Explosionsdarstellung eine Schifflibahn für eine Kleinstickmaschine mit horizontal liegender Stichplatte,
Figur 4
ein vergrösserter Ausschnitt A in Figur 3,
Figur 5
einen Schnitt V-V in Figur 3 parallel vor dem Kontaktstift bei zusammengefügten Elementen der Schifflibahn mit geöffnetem Kontakt und
Figur 6
eine Aufsicht auf eine Schifflibahn mit Sticknaht- und Fadenverlauf, der Übersicht halber auf Nadel, Schiffli und Stoff beschränkt.
Based on illustrated embodiments, the invention will be explained in more detail. Show it:
FIG. 1
A perspective view of the module in FIG. 2 in exploded view,
FIG. 2
a representation of a module with four Schifflibahnen, front the tap hole plate, in exploded view,
FIG. 3
an exploded view of a Schifflibahn for a small stitching machine with horizontal throat plate,
FIG. 4
an enlarged detail A in FIG. 3 .
FIG. 5
a section VV in FIG. 3 parallel in front of the contact pin with assembled elements of the Schifflibahn with open contact and
FIG. 6
a view of a Schifflibahn with stitching and thread course, for clarity, limited to needle, Schiffli and fabric.

Die in Figur 1 dargestellte Stichlochplatte 1 auf einer Grossstickmaschine trägt an ihrer Rückseite vier Schifflibahnen 3, auch Stöckli genannt. Zwischen der Stichlochplatte 1, die hier ein Modul aus einer Vielzahl von Modulen an der Stickmaschine darstellt, welche aus Metall gefertigt ist und den Schifflibahnen 3, die ebenfalls aus Metall gefertigt sind, liegt eine Zwischenplatte 5 (Fig. 3) aus einem nicht-leitenden, jedoch gute Gleiteigenschaften aufweisenden Material. Mit Schrauben 7, welche die Stichlochplatte 1 und die Zwischenplatte 5 durchdringen, werden die Schifflibahnen 3 in regelmässigen Abständen befestigt und liegen an der Zwischenplatte 5 an. Die Schifflibahnen 3 sind bei Grossstickmaschinen um ca. 15° geneigt zur Vertikalen verlaufend, so dass die darauf gleitenden Schiffli 9 mit ihrer Sohle durch ihr Gewicht auf der glatten Oberfläche der Schifflibahnen 3 aufliegen. Figur 1 zeigt Schiffli in tiefster Position und auf dem unteren Treiberstift 8 aufliegend.In the FIG. 1 shown tap hole plate 1 on a large embroidery machine carries on its back four Schifflibahnen 3, also called Stöckli. Between the tap hole plate 1, which here represents a module of a plurality of modules on the embroidery machine, which is made of metal and the Schifflibahnen 3, which are also made of metal, is an intermediate plate 5 ( Fig. 3 ) made of a non-conductive, but good sliding properties having material. With screws 7, which penetrate the tap hole plate 1 and the intermediate plate 5, the Schifflibahnen 3 attached at regular intervals and are applied to the intermediate plate 5. The Schifflibahnen 3 are large embroidery machines by about 15 ° inclined to the vertical, so that the sliding Schiffli 9 rest with their sole by their weight on the smooth surface of the Schiffli 3. FIG. 1 shows Schiffli in the lowest position and resting on the lower driver pin 8.

In der Zwischenplatte 5 sind benachbart zu jeder Schifflibahn 3, Ausnehmungen 11 ausgebildet, so dass an den entsprechenden Stellen, das heisst im Querschnittsbereich der Ausnehmungen 11, von der Schifflibahnseite her gesehen, die Rück- oder Unterseite der Stichlochplatte 1 sichtbar ist. Innerhalb dieses sichtbaren Bereichs der Stichlochplatte 1 liegt das Stichloch 13, durch welches eine in Figur 6 dargestellte Nadel 33 die Stichlochplatte 1 und die Zwischenplatte 5 durchdringt und in einer Nut (Nadelkanal) 15 in der Oberfläche 3' der Schifflibahn 3 diese unter einem Schiffli 9 durchqueren kann. Diese Ausnehmungen werden als Freistellung für den Schifflifaden 23 und Nadelfaden 24 benötigt, damit der Nadelfaden 24, wenn er vom Schiffli 9 durchdrungen wird, nirgends streifen oder eingezwickt werden kann.In the intermediate plate 5 adjacent to each Schifflibahn 3, recesses 11 are formed, so that at the corresponding locations, ie in the cross-sectional area of the recesses 11, seen from Schifflibahnseite, the back or bottom of the tap hole plate 1 is visible. Within this visible area of the tap hole plate 1 is the stitch hole 13 through which a in FIG. 6 shown needle 33 penetrates the tap hole plate 1 and the intermediate plate 5 and in a groove (needle channel) 15 in the surface 3 'of the Schifflibahn 3 this can pass under a Schiffli 9. These recesses are required as an exemption for the Schifflifaden 23 and needle thread 24 so that the needle thread 24 when it is penetrated by Schiffli 9, nowhere can strip or be pinched.

In der Figur 2 ist auch die Unterseite bzw. Innenseite der Zwischenplatte 5 sichtbar. In der Unterseite der Zwischenplatte 5 sind nutförmige Schlitze 17 dargestellt, in welche die ebenfalls in Figur 2 zwischen der Stichlochplatte 1 und der Zwischenplatte 5 dargestellten, z.B. aus Federdraht bestehenden Kontaktstifte 19 eingelegt werden können. Jeder Kontaktstift 19 weist im Wesentlichen eine Gestalt eines zur Seite gelegten "U's" auf, wie auch die ihn aufnehmenden Schlitze 17. Der obenliegende Schenkel 19' (Figuren 1, 2, 5) des Kontaktstifts 19 verlässt den Schlitz 17 bzw. ragt über diesen hinaus und überquert die Ausnehmung 11 in der Zwischenplatte 5. Der Kontaktstift 19 liegt folglich innerhalb des Querschnitts der Zwischenplatte 5, d.h. zwischen deren Ober- und Unterseite. Der Kontaktstift 19 ist vorzugsweise aus Federstahl hergestellt und derart gebogen, dass der obenliegende Schenkel 19' oder dessen Ende, wenn die Stichlochplatte 1 mit der Zwischenplatte 5 und der dahinterliegenden Schifflibahn 3 durch die Schrauben 7 verbunden ist, an der Schifflibahn 3 anliegt. Der obenliegende Schenkel 19' des Kontaktstifts 19 liegt folglich im Laufweg des Schifflifadens 23, der aus der Fadenöse 21 am Schiffli 9 zum Stichloch 13 in der Stichlochplatte 1 führt, wenn das Schiffli 9 nach dem Passieren der Fadenschlaufe 22 des Oberfadens nach unten in die Ausgangsposition, wie in den Figuren 1, 2 und 6 dargestellt, geführt wird. Während der Stichbildung wird, wenn auch nur minimal, Schifflifaden 23 verbraucht. Beim Zurückführen des Schifflis 9 durch den oberen Treiberstift (Treiberstift nicht dargestellt) in die Ausgangsposition, erfolgt dann ein Fadenabzug aus der Bobine 35, die sich im Innern des Schifflis 9 befindet. Während des Abzugs des Schifflifadens 23 wird dieser Schifflifaden 23 im Schiffli 9 mittels einer Fadenbremse leicht gebremst und das Trum des Schifflifadens 23, welches zum Stichloch 13 verläuft und dort im Stickgut gehalten ist, wird dadurch gespannt. Der gespannte Schifflifaden 23 wird am Schenkel 19' des Kontaktstifts 19 im Bereich der Ausnehmung 11 in der Zwischenplatte 5 leicht ausgelenkt. Die vom gespannten Schifflifaden 23 auf den Kontaktstift 19 bzw. den Schenkel 19' des Kontaktstifts 19 ausgeübte Kraft genügt, den Schenkel 19' leicht auszulenken, so dass dessen Ende 19" aus der Kontaktlage mit der Oberfläche der metallischen Schiffchenbahn 3 abhebt und kein elektrischer Kontakt mehr besteht. Der Schenkel 19' des Kontaktstifts 19 erzeugt bei der Auslenkung durch den Schifflifaden 23 eine Verformung des langen, als Federelement wirkenden Basisschenkels des U-förmigen Kontaktstifts 19, der von einer Abdeckung 20, die als Isolierung gegenüber der Stichlochplatte 1 dient, im Schlitz 17 gehalten wird. Mit dieser Anordnung ist es möglich, durch einfaches Einlegen in den Schlitz 17, Abdecken mit der Abdeckung oder einer geeigneten Folie (nicht dargestellt) und darauffolgendem Zusammenfügen der Stichlochplatte 1 mit der Zwischenplatte 5 und den Schifflibahnen 3 den Kontaktstift bzw. die Kontaktstifte 19 einwandfrei festzuhalten. Das dem Ende 19' des Kontaktstifts 19 gegenüberliegende Ende 31 des Kontaktstifts 19 ist mit einem Draht mit der Maschinensteuerung verbunden (Draht nicht dargestellt). Bei Fadenbruch oder aufgebrauchtem Schifflifaden 23 wird eine elektrische Verbindung zwischen der Schifflibahn 3 und der Maschinensteuerung hergestellt. Diese bewirkt eine Fehlermeldung und stoppt die Maschine. Alternativ kann selbstverständlich die Lage des Schenkels 19' des Kontaktstifts 19 auch derart angeordnet werden, dass bei korrekter Fadenspannung des Schifflifadens 23 der Schenkel 19' vom Schifflifaden 23 derart ausgelenkt wird, dass er in Kontakt mit der Stichlochplatte 1 gelangt. In diesem Fall bedeutet folglich, dass eine elektrische Verbindung von der Stichlochplatte 1 zur Steuerung einen fehlerfreien Betrieb darstellt und ein Unterbruch der Verbindung eine Fehlermeldung darstellt, welche zu einem Maschinenstopp führt.In the FIG. 2 is also the bottom or inside of the intermediate plate 5 visible. In the bottom of the Intermediate plate 5 groove-shaped slots 17 are shown, in which also in FIG. 2 between the tap hole plate 1 and the intermediate plate 5 shown, for example, consisting of spring wire pins 19 can be inserted. Each contact pin 19 essentially has a shape of a "U" placed to the side, as well as the slots 17 receiving it. The upper leg 19 '(FIG. FIGS. 1 . 2 . 5 ) of the contact pin 19 leaves the slot 17 and projects beyond it and crosses the recess 11 in the intermediate plate 5. The contact pin 19 is thus within the cross section of the intermediate plate 5, ie between the top and bottom. The contact pin 19 is preferably made of spring steel and bent such that the upper leg 19 'or its end when the tap hole plate 1 is connected to the intermediate plate 5 and the underlying Schifflibahn 3 by the screws 7, abuts the Schifflibahn 3. The overhead leg 19 'of the contact pin 19 is thus in the path of the Schifflifadens 23, which leads from the eyelet 21 on Schiffli 9 to the stitch hole 13 in the tap hole plate 1, when the Schiffli 9 after passing through the thread loop 22 of the upper thread down to the starting position as in the FIGS. 1 . 2 and 6 represented is performed. During the stitch formation, loop strings 23 are consumed, albeit minimally. When returning the Schifflis 9 through the upper driver pin (Driver pin not shown) in the starting position, then takes a thread withdrawal from the reel 35, which is located inside the Schifflis 9. During the withdrawal of the Schifflifadens 23 of this Schifflifaden 23 is slightly braked in Schiffli 9 by means of a yarn brake and the strand of the Schifflifadens 23, which extends to the stitch hole 13 and is held there in the embroidery is stretched by it. The stretched Schifflifaden 23 is easily deflected on the leg 19 'of the contact pin 19 in the region of the recess 11 in the intermediate plate 5. The force exerted by the strained Schifflifaden 23 on the contact pin 19 and the legs 19 'of the contact pin 19 is sufficient to deflect the leg 19' slightly, so that its end 19 "lifts from the contact position with the surface of the metallic shuttle track 3 and no electrical contact The leg 19 'of the contact pin 19 generates during deflection by the Schifflifaden 23 deformation of the long, acting as a spring element base leg of the U-shaped contact pin 19 of a cover 20, which serves as insulation against the needle plate 1 in the With this arrangement, it is possible, by simply inserting into the slot 17, covering with the cover or a suitable film (not shown) and then joining the tap hole plate 1 with the intermediate plate 5 and the Schifflibahnen 3 the contact pin or to hold the contact pins properly 19. The end 19 'of the Contact pin 19 opposite end 31 of the contact pin 19 is connected to a wire with the machine control (wire not shown). When broken yarn or used Schifflifaden 23 an electrical connection between the Schifflibahn 3 and the machine control is made. This causes an error message and stops the machine. Alternatively, of course, the position of the leg 19 'of the contact pin 19 can also be arranged such that at the correct thread tension of the Schifflifadens 23 of the leg 19' is deflected by the Schifflifaden 23 so that it comes into contact with the tap hole plate 1. In this case, therefore, means that an electrical connection from the taphole plate 1 to the controller represents a fault-free operation and an interruption of the connection is an error message, which leads to a machine stop.

In der Ausgestaltung der Vorrichtung gemäss den Figuren 3-5, welche speziell geeignet für Klein-Stickmaschinen mit horizontal liegendem Stickgut ist, das jedoch auch bei Grossstickmaschinen einsetzbar ist, besteht der Kontaktstift 19 aus einem geradlinig verlaufenden Draht, vorzugsweise Federdraht oder einem Blechstreifen als Kontaktstift 19, der an der Rückseite der Schifflibahn 3 und/oder an der Rückseite der Zwischenplatte 5 befestigt und federnd gehalten ist.In the embodiment of the device according to the Figures 3-5 , which is particularly suitable for small embroidery machines with horizontally lying embroidery, but which can also be used in large embroidery machines, the contact pin 19 consists of a straight running wire, preferably spring wire or a metal strip as a contact pin 19 which at the back of the Schifflibahn 3 and / or attached to the back of the intermediate plate 5 and is held resiliently.

Das hintere Ende des Kontaktstifts 19 ist mit einer Steckverbindung 25 verbunden. Die Steckkupplung 25 (siehe Figuren 3 und 4) dient dazu, eine stromleitende Verbindung mit einem Draht zur Zustandsübermittlung an die Steuerung der Schifflistickmaschine herzustellen.
Die Steckverbindung 25 gemäss den Figuren 3 und 4 ist mittels einer Schraube 27 befestigt, auf deren Schaft das hintere Ende bzw. der untenliegende Schenkel des Kontaktstifts 19 befestigt ist. In einer bevorzugten Ausgestaltung der Befestigung des Kontaktstifts 19 umschlingt dieser den Schaft 29 partiell und ist fest mit dem Schaft 29 verbunden, zum Beispiel verschweisst. Alternativ kann das hintere Ende des vorzugsweise aus Federdraht hergestellten Kontaktstifts 19 auch mehrmals um den Schaft 29 herum gewickelt sein, um den geradlinig verlaufenden Abschnitt des Kontaktstifts 19 federelastisch vorgespannt durch die Ausnehmung 11 hindurch an ein Kontaktblech 18 mit leitender Verbindung zur Stichlochplatte 1 zu halten. Die Steckkupplung 25, welche mit dem Schaft 29 fest verbunden ist, dient weiter dazu, die Spannkraft des Kontaktstifts 19 einstellbar zu gestalten und so die Empfindlichkeit des Fadenwächters einstellen zu können (Figuren 3 und 5). Zu diesem Zweck ist an der Steckverbindung 25 ein Rastelement 37 mit unterschiedlichen Raststellungen ausgebildet. Selbstverständlich könnte auch bei dieser Ausführungsform der Kontaktstift 19 derart geformt sein, dass bei korrekter Fadenspannung Kontakt zur Stichlochplatte 1 besteht und bei fehlender Spannung der Kontaktstift 19 in Ruhestellung von der Stichlochplatte 1 entfernt liegt und keinen Kontakt herstellt.The rear end of the contact pin 19 is connected to a connector 25. The plug-in coupling 25 (see Figures 3 and 4 ) serves to make an electrically conductive connection with a wire for transmitting state to the controller of the Schifflitickmaschine.
The connector 25 according to the Figures 3 and 4 is fastened by means of a screw 27, on the shank of which the rear end or the lower leg of the contact pin 19 is fastened. In a preferred embodiment of the attachment of the contact pin 19 this wraps around the shaft 29 partially and is firmly connected to the shaft 29, for example, welded. Alternatively, the rear end of the contact pin 19 preferably made of spring wire may also be wound several times around the shaft 29 to hold the rectilinear portion of the contact pin 19 resiliently biased by the recess 11 to a contact plate 18 with conductive connection to the tap hole plate 1. The plug-in coupling 25, which is fixedly connected to the shaft 29, further serves to make the clamping force of the contact pin 19 adjustable and thus to be able to adjust the sensitivity of the thread monitor ( Figures 3 and 5 ). For this purpose, a locking element 37 is formed with different locking positions on the connector 25. Of course, in this embodiment, the contact pin 19 may be formed such that at correct thread tension contact to the tap hole plate 1 and in the absence of tension the contact pin 19 is at rest from the tap hole plate 1 is removed and does not make contact.

Alternativ zu einem federnd einseitig gelagerten Kontaktstift 19 ist auch eine Ausführung mit einem gegen die Schwerkraft durch den Schifflifaden 23 verschiebbar gelagerten Kontaktstift 19 möglich (keine Abb.).As an alternative to a resiliently mounted on one side contact pin 19 is also a version with a against gravity by the Schifflifaden 23 slidably mounted contact pin 19 possible (no Fig.).

Dem Maschinenhersteller ist es folglich überlassen, die Wahl zu treffen, ob das Auslösen einer Fehlermeldung durch einen existierenden Kontakt oder einen fehlenden Kontakt ausgelöst werden soll.It is thus up to the machine manufacturer to make the choice as to whether the triggering of an error message should be triggered by an existing contact or a missing contact.

Claims (12)

  1. An embroidery machine comprising a device for monitoring the presence and the tension of the shuttle thread (23) at each embroidery location, comprising a needle plate (1), characterized in that an intermediate plate (5) is arranged on the rear side of the needle plate (1), wherein a multiplicity of shuttle races (3) are attached resting on the intermediate plate (5), a contact element (19) which is configured to be resilient, and a recess (11) is arranged in a traversing manner in the intermediate plate (5), wherein the contact element (19) in the recess (11) extends in a crossing manner in order to run the shuttle thread (23) between the needle hole (13) in the needle plate (1) and a thread eye (21) in the shuttle (9), and can be deflected in said recess by the shuttle thread (23).
  2. The embroidery machine according to Claim 1, characterized in that, in the event of the thread tension not being correct due to the omission of the shuttle thread and/or of the thread tension, the contact element (19) comes into contact with a contact receiver and establishes an electrical connection to the machine-control system.
  3. The embroidery machine according to Claim 1, characterized in that, in the event that the thread tension is not correct, the contact element (19) comes out of contact with a contact receiver and interrupts an electrical connection to the machine-control system.
  4. The embroidery machine according to any one of Claims 2 to 3, characterized in that the needle plate (1) or the shuttle race (3) serves as the contact receiver.
  5. The embroidery machine according to any one of Claims 1 to 4, characterized in that the contact element (19) comprises a bent wire or pin which is held in a groove-shaped slot (17) in the intermediate plate in an electrically insulated manner such that one leg (19') thereof can be deflected by the shuttle thread (23).
  6. The embroidery machine according to Claim 5, characterized in that there is configured in the intermediate plate (5) a recess (11) which is at least partially traversed by the leg (19') of the contact element (19) such that the leg (19') can be deflected by the shuttle thread (23) within the recess (11).
  7. The embroidery machine according to any one of Claims 1 to 4, characterized in that the contact element (19) is attached at a single end to a bolt or to a screw (27), with which bolt (27) a tension can be applied to the contact element (19).
  8. The embroidery machine according to Claim 7, characterized in that the bolt (27) is connected to a plug-in coupling (25), with which an electrical connection of the contact element (19) to the machine-control system can be established.
  9. The embroidery machine according to any one of Claims 1 to 8, characterized in that in the event of a fracture or defect of a contact element (19) an error message is output and the machine is stopped.
  10. The embroidery machine according to any one of Claims 1 to 6, characterized in that the contact element (19) is resiliently held on one side.
  11. The embroidery machine according to any one of Claims 1 to 6, characterized in that the contact element (19) is held rigidly on one side, but consists of a resilient material.
  12. The embroidery machine according to any one of Claims 1 to 6, characterized in that the contact element (19) is held in a guide and can be displaced by gravity against the force of the shuttle thread (23), in order to come into connection with the contact receiver.
EP14796666.7A 2013-11-08 2014-10-31 Device for monitoring the schiffli thread on a large or small schiffli embroidery machine Not-in-force EP3066247B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01877/13A CH708828A1 (en) 2013-11-08 2013-11-08 Device for monitoring the Schifflifadens on an upper or lower-Schiffli.
PCT/CH2014/000158 WO2015066825A1 (en) 2013-11-08 2014-10-31 Device for monitoring the schiffli thread on a large or small schiffli embroidery machine

Publications (2)

Publication Number Publication Date
EP3066247A1 EP3066247A1 (en) 2016-09-14
EP3066247B1 true EP3066247B1 (en) 2017-09-13

Family

ID=51897013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14796666.7A Not-in-force EP3066247B1 (en) 2013-11-08 2014-10-31 Device for monitoring the schiffli thread on a large or small schiffli embroidery machine

Country Status (5)

Country Link
EP (1) EP3066247B1 (en)
CN (1) CN104955997B (en)
CH (1) CH708828A1 (en)
TW (1) TWI627323B (en)
WO (1) WO2015066825A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020201936A1 (en) * 2019-03-30 2020-10-08 Lohia Corp Limited A system and method to monitor tape breakage

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US602876A (en) * 1898-04-26 Louis schultz
US2908237A (en) * 1957-02-21 1959-10-13 Ragnar W Winberg Throat plate
DE1295341B (en) 1964-08-25 1969-05-14 Saurer Ag Adolph Thread monitor for shuttle embroidery machines
US3732834A (en) * 1971-04-23 1973-05-15 N Mayer Bobbin runout signalling device
DE8329216U1 (en) * 1983-10-10 1984-01-05 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern THREAD GUARD FOR SEWING, EMBROIDERY AND TUFTING MACHINES OR THE LIKE
DE3432527A1 (en) * 1984-09-05 1986-03-13 Zsk Stickmaschinen Gmbh, 4150 Krefeld Device for monitoring the under-thread of an embroidering, quilting or sewing machine
DE3501632A1 (en) * 1985-01-19 1986-07-24 Friedrich Wietzke GmbH, 4800 Bielefeld TEXTILE MACHINE
DE19859158A1 (en) * 1998-12-21 2000-06-29 Saurer Sticksysteme Ag Arbon Shuttle thread monitoring
ATE244785T1 (en) * 1999-11-05 2003-07-15 Laesser Franz Ag THREAD GUARD BAR
ATE327362T1 (en) * 2004-04-29 2006-06-15 Laesser Ag SHIP EMBROIDERY MACHINE
TWI444516B (en) * 2006-07-20 2014-07-11 Lasser Ag Shuttle embroidery machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
TW201522738A (en) 2015-06-16
EP3066247A1 (en) 2016-09-14
WO2015066825A1 (en) 2015-05-14
TWI627323B (en) 2018-06-21
CN104955997B (en) 2018-03-02
CH708828A1 (en) 2015-05-15
CN104955997A (en) 2015-09-30

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