EP2029465B1 - Method for operating a workstation of a textile machine which produces crosswound bobbins - Google Patents

Method for operating a workstation of a textile machine which produces crosswound bobbins Download PDF

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Publication number
EP2029465B1
EP2029465B1 EP07725394.6A EP07725394A EP2029465B1 EP 2029465 B1 EP2029465 B1 EP 2029465B1 EP 07725394 A EP07725394 A EP 07725394A EP 2029465 B1 EP2029465 B1 EP 2029465B1
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EP
European Patent Office
Prior art keywords
suction nozzle
thread end
end receiving
receiving position
bobbin
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EP07725394.6A
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German (de)
French (fr)
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EP2029465A1 (en
Inventor
Hans-Günter Wedershoven
Stefan Bungter
Manfred Mund
Bernd-Rüdiger Theele
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Saurer Spinning Solutions GmbH and Co KG
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Saurer Germany GmbH and Co KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
    • B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method for operating a job of a cross-wound producing textile machine according to the preamble of claim 1 and a corresponding job.
  • Such a job of a cheese winder for example, in the DE 101 50 590 A1 described.
  • This known job has, inter alia, a suction nozzle, which receive the accumulated after a thread break or a defined cleaner cut on the surface of a cheese upper thread and can insert into a pneumatic yarn splicing device, where the upper thread is connected to a prepared by a looper thread lower thread.
  • the suction nozzle which is displaceable between two end positions, is either, as in the DE 101 50 590 A1 described, acted upon by a tension spring and guided on a cam, pivoted into a thread receiving position in which the mouth of the suction nozzle is positioned in the region of the surface of the cheese held in the bobbin or the suction nozzle, as for example in the EP 0 717 001 B1 is indicated, acted upon by a single motor, pivotable between its end positions.
  • the suction nozzles are usually at a so-called suction nozzle stop, via which the optimal distance between the mouth of the suction nozzle and the surface of the yarn pickup slowly rotating in unwinding cheese is adjustable.
  • the suction nozzle stop depending on the diameter of the cheese, automatically adjusted over a multi-part lever linkage.
  • the present invention seeks to develop a method and an apparatus which / improves the operation of the jobs of cheese-producing textile machines, especially of cheese winder.
  • the jobs of such textile machines should be designed so that problems that may occur in the Fadenendsuche or at the Fadenending, can be reacted quickly and flexibly.
  • the inventive method in which the suction nozzle, starting from a sensory detected position of the suction nozzle, by the execution of a predetermined number of steps of a stepping motor in a yarn end receiving position is positioned so that the mouth of the suction nozzle is arranged at a defined distance from the surface of the cheese, has the particular advantage that the very important for a successful final thread take-up distance can not only be adjusted quickly and completely easily, but that if necessary, this distance, by appropriate control of the stepping motor, at any time easily corrected or optimized again.
  • the positioning of the suction nozzle in the yarn end receiving position can also be realized by a motor which is equipped with a flywheel.
  • the sensory detectable position of the suction nozzle is removed at least as far from the respective yarn end receiving position arranged that, based on the pivot angle of the suction nozzle in the direction of the yarn end receiving position, always before the yarn end receiving position.
  • the stepping motor which pivots the suction nozzle into the yarn end receiving position, can always be operated with the current position data of the suction nozzle before swiveling the suction nozzle into the yarn end receiving position. That is, any malpositions of the suction nozzle, for example, due to a temporary blockage of the suction nozzle, are recognized and taken into account at the latest at this time. In particular, the risk that the mouth of the suction nozzle unintentionally starts against the surface of the cheese is thus largely eliminated.
  • the number of steps of the stepping motor is adjusted in the course of a coil travel so that it corresponds to the associated change in position of the coil surface. This means that, depending on the particular diameter of the cross-wound bobbin, the suction nozzle successively assumes different yarn end receiving positions. The pivoting of the suction nozzle in each of these optimal Fadenendage sueden takes place automatically, that is, there are no manual intervention by the operating personnel required.
  • this sensory position in order to minimize possible errors, is close to the yarn end receiving position, preferably not more than 100 steps before the yarn end receiving position.
  • the setting of the yarn end receiving positions for the plurality of suction nozzles of the textile machine takes place centrally on a textile machine's own control unit.
  • the distance between the mouth of the suction nozzle and the surface of the cheese is the same at least at the start of a lot at all jobs.
  • the distance of the mouth of the suction nozzle to the surface of the cheese during a Fadenendsuch- and -effortzyklus' of the suction nozzle is variable. That is, the Fadenendam ein the suction nozzle can be corrected immediately when it comes within a Fadenendsuch- and - pickup 'to one or more failed attempts (s) at the Fadenendam, which is detected for example by a sensor disposed within the suction nozzle.
  • the suction nozzle When the suction nozzle, as described in claim 7, performs pitching movements during a yarn end search and pick-up cycle in the case of a miss attempt, the distance of the mouth of the suction nozzle to the surface of the cheese advantageously changed between two pitching movements. That is, before the second or third pitching movement of the suction nozzle, its yarn end receiving position, when the sensor in the suction nozzle does not initiate a signal indicative of a successful yarn end picking attempt, is somewhat corrected.
  • the suction nozzle always first performs a complete Fadenendsuch- and - recording cycle, the success, as indicated above, is monitored by a corresponding sensor device.
  • a self-optimization of the distance of the mouth of the suction nozzle to the surface of the cross-wound bobbin takes place.
  • the yarn end receiving position of the suction nozzle is corrected so long, for example, depending on the successes or failures of the yarn end receiving tests until the number of failed attempts at the Fadenending is minimized.
  • the determined values for the distance can be used as a guideline for the start in later yarn lots, whereby these values are then, in turn, optimized as far as is still possible.
  • the suction nozzle can be moved slowly to the surface of the cheese and slowly placed on the surface for releasing a thread end, which was infiltrated by the bobbin drive drum in the surface of the cheese, (claim 10). Since the cross-wound bobbin is also rotated in the unwinding direction at this time, the thread end runs against the mouth of the suction nozzle and is thereby released from the surface of the cross-wound bobbin. The loosened thread end is then detected by the suction nozzle, which in the meantime is again positioned in a predetermined yarn end receiving position, and, as usual, conveyed to the yarn splicing device.
  • the suction nozzle as described in claim 11, are moved slowly to the surface of the sleeve for determining the inserted into the winding device sleeve format.
  • the number of steps of the stepping motor to stop the suction nozzle is detected by contact with the surface of the sleeve and processed, for example, in the textile machine's own control unit for calculating the sleeve format.
  • the suction nozzle for determining the inserted into the winding device sleeve format is slowly moved up to the surface of the sleeve as the starting position for determining the Fadenendamgnayak that the suction nozzle after contact with the Sleeve pivoted back into the yarn end receiving position and thereby out of the
  • the jobs where the inventive method is used, as set forth in claim 13, each have a winding device for winding a package and a suction nozzle for receiving a accumulated on the surface of the cross-wound yarn end.
  • the suction nozzle has a drive designed as a stepper motor, which is connected to a spool point own control device and controllable so that the suction nozzle is positionable in predeterminable Fadenendage sueden in which the mouth of the suction nozzle has a defined distance to the surface of the cheese.
  • Such stepper motors allow a relatively simple way an accurate and reproducible positioning of the suction nozzle. That is, the suction nozzle can be quickly and easily positioned in predeterminable Fadenendage sueden, the necessary control effort is relatively low.
  • FIGS. 1 and 2 is in each case schematically, in side view, a job 2 of a generally designated by the reference numeral 1 cheesemaking textile machine shown.
  • textile machines of this type which are designed, for example, as spooling machines, have a multiplicity of these identical workstations, in this case winding stations 2, between their end frames (not shown).
  • the spin cords 3, which are produced for example on a ring spinning machine and have relatively few yarn material, are rewound into large-volume cheeses 5 on these winding stations 2.
  • Such automatic packages 1 usually have a logistics device in the form of a bobbin and tube transport system 6, in which 11 spinning cops 3 or empty tubes rotate on transport plates.
  • a logistics device in the form of a bobbin and tube transport system 6, in which 11 spinning cops 3 or empty tubes rotate on transport plates.
  • the delivered spinning cops 3 in one of the Abspul einen AS which are each located in the region of the transverse transport lines 19 at the winding units 2, rewound to large-volume cheeses 5.
  • the individual winding units have, as is known and therefore only indicated, various devices which ensure the proper operation of such winding units 2.
  • These devices are each connected to a workstation own control device 31, wherein the control device 31 in turn is connected via a machine bus 33 to a central control unit 32 of the textile machine 1.
  • workstations 2 include, inter alia, a pivotally mounted suction nozzle 24 and a pivotally mounted gripper tube 25.
  • the suction nozzle 24 is rotatably mounted limited to a pivot axis 23 and has a stepper motor designed as a drive 15 which is connected via a control line 36 to the workstation's own control device 31.
  • the suction nozzle 24 also has a sensor device 41, by which it is possible to check whether a thread take-up test of the suction nozzle 24 was successful.
  • a sensor 40 is installed in the region of the suction nozzle 24, by means of which the pivoting angle of the suction nozzle 24 can be controlled during its pivoting into the yarn end receiving position.
  • Such work stations 2 generally also have a yarn splicing device 26, a thread tensioning device 30, a thread cleaner 28, a yarn tension force sensor 29 and a lower thread sensor 22.
  • the winding device which is generally designated by the reference numeral 4, has a coil frame 8 which is movably mounted about a pivot axis 12.
  • the freely rotatably supported in the coil frame 8 cross-wound bobbin 5 during the winding process with its surface 35 on a bobbin drive roller 9 and is driven by this via frictional engagement.
  • the running of the spinning cop 3 to the cheese 5 thread 16 is also traversed by a Fadenchangier driving 10, which has, for example, a finger-trained, acted upon by an electromechanical drive 14 yarn guide 13, between the two end faces of the cheese 5 during the winding process.
  • Such traversing devices are known and, for example, in the DE 198 58 548.9 described in detail.
  • a cross-coil transport device 7 is also arranged, can be transported through the finished cheeses.
  • the suction nozzle 24 by means of the stepping motor 15 from the in FIG. 1 shown starting position are pivoted into a yarn end receiving position in which the mouth 34 of the suction nozzle 24 is positioned at a defined distance a to the surface 35 of the cheese 5.
  • the distance a between the mouth 34 of the suction nozzle 24 and the surface 35 of the cheese 5 can be exactly adjusted by appropriate driving the stepper motor 15 and at any time, for example, depending on the results that are achieved in the Fadenendage be corrected.
  • a successful Fadenending that is, the presence of the upper thread in the suction nozzle 24 is detected by a sensor device 41 which is disposed within the suction nozzle 24 and connected via a corresponding signal line to the workstation's own control device 31.
  • the workstation computer 31 upon receipt of a corresponding signal from the sensor device 41, ensures that the stepping motor 15 pivots the suction nozzle 24 down again and inserts the picked-up upper thread into the yarn splicing device 26. If no corresponding signal of the sensor device 41 is received, the suction nozzle 24 could thus not receive the upper thread from the surface 35 of the cross-wound bobbin 5, the suction nozzle 24 is positioned in a modified Fadenendamgna.
  • the distance a between the mouth 34 of the suction nozzle 24 and the surface 35 of the cheese 5 is changed, usually reduced in practice.
  • the Fadenendability of the upper thread through the suction nozzle 24 also takes the Fadenendability and Fadenendüber Installation the lower thread.
  • the gripper tube 25, which is preferably also driven by a single motor, receives the lower thread connected to the spinning cop 3, pivots upwards and places the lower thread in the thread splicing device 26.
  • the yarn ends of upper and lower thread are first prepared in a known manner and then, as usual, pneumatically spliced to form a new thread 16.
  • the winding process can be resumed at the winding unit in question.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Looms (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine gemäß dem Oberbegriff des Anspruches 1 sowie eine entsprechende Arbeitsstelle.The invention relates to a method for operating a job of a cross-wound producing textile machine according to the preamble of claim 1 and a corresponding job.

Arbeitsstellen von Kreuzspulen herstellenden Textilmaschinen, die jeweils mit einer Spulvorrichtung zum Wickeln einer Auflaufspule sowie mit einer Saugdüse zum Aufnehmen eines auf die Oberfläche der Kreuzspule aufgelaufenen Fadenendes ausgestattet sind, sind, insbesondere im Zusammenhang mit Kreuzspulautomaten, seit langem bekannt.Workstations of cheese-producing textile machines, each equipped with a winding device for winding a package and a suction nozzle for receiving a accumulated on the surface of the cheese package yarn end, have long been known, in particular in connection with cheese winder.

Eine solche Arbeitsstelle eines Kreuzspulautomaten ist beispielsweise in der DE 101 50 590 A1 beschrieben. Diese bekannte Arbeitsstelle weist unter anderem eine Saugdüse auf, die den nach einem Fadenbruch oder einem definierten Reinigerschnitt auf die Oberfläche einer Kreuzspule aufgelaufenen Oberfaden aufnehmen und in eine pneumatische Fadenspleißvorrichtung einlegen kann, wo der Oberfaden mit einem durch ein Greiferrohr bereitgelegten Unterfaden verbunden wird. Die Saugdüse, die zwischen zwei Endstellungen verlagerbar ist, wird dabei entweder, wie in der DE 101 50 590 A1 beschrieben, durch eine Zugfeder beaufschlagt und an einer Kurvenscheibe geführt, in eine Fadenaufnahmestellung geschwenkt, in der die Mündung der Saugdüse im Bereich der Oberfläche der im Spulenrahmen gehaltenen Kreuzspule positioniert ist oder die Saugdüse ist, wie dies beispielsweise in der EP 0 717 001 B1 angedeutet ist, durch einen Einzelmotor beaufschlagt, zwischen ihren Endstellungen verschwenkbar.Such a job of a cheese winder, for example, in the DE 101 50 590 A1 described. This known job has, inter alia, a suction nozzle, which receive the accumulated after a thread break or a defined cleaner cut on the surface of a cheese upper thread and can insert into a pneumatic yarn splicing device, where the upper thread is connected to a prepared by a looper thread lower thread. The suction nozzle, which is displaceable between two end positions, is either, as in the DE 101 50 590 A1 described, acted upon by a tension spring and guided on a cam, pivoted into a thread receiving position in which the mouth of the suction nozzle is positioned in the region of the surface of the cheese held in the bobbin or the suction nozzle, as for example in the EP 0 717 001 B1 is indicated, acted upon by a single motor, pivotable between its end positions.

In der Fadenaufnahmestellung liegen die Saugdüsen in der Regel an einem sogenannten Saugdüsenanschlag an, über den der optimale Abstand zwischen der Mündung der Saugdüse und der Oberfläche der während der Fadenaufnahme langsam in Abwickelrichtung rotierenden Kreuzspule einstellbar ist.
Um sicherzustellen, daß dieser optimale Abstand sowohl bei kleinen Kreuzspulen zu Beginn einer Spulenreise als auch bei großen Kreuzspulen am Ende einer Spulenreise gegeben ist, wird der Saugdüsenanschlag, in Abhängigkeit vom Durchmesser der Kreuzspule, über ein mehrteiliges Hebelgestänge automatisch nachgestellt.In the thread receiving position, the suction nozzles are usually at a so-called suction nozzle stop, via which the optimal distance between the mouth of the suction nozzle and the surface of the yarn pickup slowly rotating in unwinding cheese is adjustable.
To ensure that this optimal distance is given both small cross-wound bobbins at the beginning of a coil travel and large cross-wound bobbins at the end of a coil travel, the suction nozzle stop, depending on the diameter of the cheese, automatically adjusted over a multi-part lever linkage.

Die vorbeschriebene Anordnung mit automatisch nachgeführten, mechanischen Saugdüsenanschlägen sowie ähnliche, geringfügig modifizierte Ausführungsformen mechanischer Saugdüsenanschläge haben sich in der Praxis im Prinzip zwar bewährt, weisen aber verschiedene Nachteile auf.The above-described arrangement with automatically tracking, mechanical suction nozzle stops and similar, slightly modified embodiments of mechanical suction nozzle stops have been proven in practice in principle, but have several disadvantages.

Wenn bei solchen Einrichtungen beispielsweise Schwierigkeiten bei der Fadenendaufnahme auftreten, die eine Korrektur des Abstandes der Mündung der Saugdüse angeraten erscheinen lassen, sind zunächst einige relativ umständliche Einstellarbeiten notwendig.
Das heißt, bei diesen Einrichtungen erfordert jede Änderung der Lage der Saugdüsenanschläge zur Optimierung des Abstandes zwischen der Mündung der Saugdüse und der Oberfläche der Kreuzspule einen zeitaufwendigen, manuellen Eingriff seitens des Bedienpersonals.If, for example, in such devices difficulties in Fadenendaufnahme occur that make it advisable to correct the distance of the mouth of the suction nozzle, some relatively complicated adjustments are first necessary.
That is, in these devices, any change in the position of the suction nozzle stops to optimize the distance between the mouth of the suction nozzle and the surface of the cheese requires a time-consuming, manual intervention on the part of the operator.

In der Praxis wird eine solche Neujustierung des Saugdüsenanschlages daher oft hinausgeschoben, was aufgrund vermehrter Fehlversuche bei der Fadenendaufnahme zu einer Verschlechterung des Wirkungsgrades der betroffenen Textilmaschine führen kann.In practice, such a readjustment of the suction nozzle stop is therefore often postponed, which can lead to a deterioration in the efficiency of the affected textile machine due to increased failure attempts in the Fadenendaufnahme.

Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zu entwickeln, das/die den Betrieb der Arbeitsstellen von Kreuzspulen herstellenden Textilmaschinen, speziell von Kreuzspulautomaten, verbessert.
Insbesondere sollen die Arbeitsstellen solcher Textilmaschinen so ausgebildet sein, dass auf Probleme, die eventuell bei der Fadenendsuche bzw. bei der Fadenendaufnahme auftreten, schnell und flexibel reagiert werden kann.Based on the aforementioned prior art, the present invention seeks to develop a method and an apparatus which / improves the operation of the jobs of cheese-producing textile machines, especially of cheese winder.
In particular, the jobs of such textile machines should be designed so that problems that may occur in the Fadenendsuche or at the Fadenendaufnahme, can be reacted quickly and flexibly.

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren, wie es im Anspruch 1 beschrieben ist bzw. durch eine Arbeitsstelle gemäß Anspruch 13 gelöst.This object is achieved by a method as described in claim 1 or by a job according to claim 13.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Das erfindungsgemäße Verfahren, bei dem die Saugdüse, ausgehend von einer sensorisch erfassten Position der Saugdüse, durch die Ausführung einer jeweils vorgegebenen Schrittzahl eines Schrittmotors in einer Fadenendaufnahmestellung so positioniert wird, dass die Mündung der Saugdüse in einem definierten Abstand zur Oberfläche der Kreuzspule angeordnet ist, hat insbesondere den Vorteil, dass der für eine erfolgreiche Fadenendaufnahme sehr wichtige Abstand nicht nur schnell und völlig problemlos eingestellt werden kann, sondern dass im Bedarfsfall dieser Abstand, durch entsprechendes Ansteuern des Schrittmotors, auch jederzeit leicht wieder korrigiert bzw. optimiert werden kann. Die Positionierung der Saugdüse in die Fadenendaufnahmestellung kann allerdings auch durch einen Motor realisiert werden, der mit einem Polrad ausgestattet ist.
Die sensorisch erfassbare Position der Saugdüse wird mindestens so weit von der jeweiligen Fadenendaufnahmestellung entfernt angeordnet, dass diese, bezogen auf den Schwenkwinkel der Saugdüse in Richtung auf die Fadenendaufnahmestellung, immer vor der Fadenendaufnahmestellung liegt.
Auf diese Weise wird gewährleistet, dass der Schrittmotor, der die Saugdüse in die Fadenendaufnahmestellung einschwenkt, vor dem Einschwenken der Saugdüse in die Fadenendaufnahmestellung stets mit den aktuellen Positionsdaten der Saugdüse betrieben werden kann.
Das heißt, eventuell aufgetretene Fehlstellungen der Saugdüse, beispielsweise aufgrund einer zwischenzeitlichen Blockierung der Saugdüse, werden spätestens zu diesem Zeitpunkt erkannt und berücksichtigt.
Insbesondere die Gefahr, dass die Mündung der Saugdüse unbeabsichtigt an die Oberfläche der Kreuzspule anläuft, ist damit weitestgehend ausgeschaltet.The inventive method, in which the suction nozzle, starting from a sensory detected position of the suction nozzle, by the execution of a predetermined number of steps of a stepping motor in a yarn end receiving position is positioned so that the mouth of the suction nozzle is arranged at a defined distance from the surface of the cheese, has the particular advantage that the very important for a successful final thread take-up distance can not only be adjusted quickly and completely easily, but that if necessary, this distance, by appropriate control of the stepping motor, at any time easily corrected or optimized again. However, the positioning of the suction nozzle in the yarn end receiving position can also be realized by a motor which is equipped with a flywheel.
The sensory detectable position of the suction nozzle is removed at least as far from the respective yarn end receiving position arranged that, based on the pivot angle of the suction nozzle in the direction of the yarn end receiving position, always before the yarn end receiving position.
In this way, it is ensured that the stepping motor, which pivots the suction nozzle into the yarn end receiving position, can always be operated with the current position data of the suction nozzle before swiveling the suction nozzle into the yarn end receiving position.
That is, any malpositions of the suction nozzle, for example, due to a temporary blockage of the suction nozzle, are recognized and taken into account at the latest at this time.
In particular, the risk that the mouth of the suction nozzle unintentionally starts against the surface of the cheese is thus largely eliminated.

Wie im Anspruch 2 dargelegt, wird die Schrittzahl des Schrittmotors im Laufe einer Spulenreise so angepasst, dass sie der damit verbundenen Positionsänderung der Spulenoberfläche entspricht.
Das bedeutet, abhängig vom jeweils vorliegenden Durchmesser der Kreuzspule nimmt die Saugdüse nacheinander unterschiedliche Fadenendaufnahmestellungen ein.
Das Einschwenken der Saugdüse in diese jeweils optimalen Fadenendaufnahmestellungen erfolgt dabei automatisch, das heißt, es sind keinerlei manuelle Eingriffe seitens des Bedienpersonals erforderlich.As set forth in claim 2, the number of steps of the stepping motor is adjusted in the course of a coil travel so that it corresponds to the associated change in position of the coil surface.
This means that, depending on the particular diameter of the cross-wound bobbin, the suction nozzle successively assumes different yarn end receiving positions.
The pivoting of the suction nozzle in each of these optimal Fadenendaufnahmestellungen takes place automatically, that is, there are no manual intervention by the operating personnel required.

Die im Laufe einer Spulenreise notwendige Anpassung der Fadenendaufnahmestellung der Saugdüse kann allerdings auch hier durch einen Motor realisiert werden, der mit einem Polrad ausgestattet ist (Anspr. 3).However, the adaptation of the yarn end receiving position of the suction nozzle, which is necessary in the course of a bobbin travel, can also be realized here by a motor which is equipped with a flywheel (claim 3).

In vorteilhafter, im Anspruch 4 beschriebener Ausführungsform ist beispielsweise vorgesehen, dass diese sensorisch erfasste Position, um eventuelle Fehler zu minimieren, nahe an der Fadenendaufnahmestellung, vorzugsweise nicht mehr als 100 Schritte vor der Fadenendaufnahmestellung liegt.In an advantageous embodiment described in claim 4, it is provided, for example, that this sensory position, in order to minimize possible errors, is close to the yarn end receiving position, preferably not more than 100 steps before the yarn end receiving position.

Wie im Anspruch 5 beschrieben, ist in vorteilhafter Ausgestaltung des Verfahrens außerdem vorgesehen, dass die Einstellung der Fadenendaufnahmestellungen für die Vielzahl der Saugdüsen der Textilmaschine zentral an einer textilmaschineneigenen Steuereinheit erfolgt.
Durch eine solche gemeinsame Eingabe wird nicht nur der Arbeitsaufwand, der notwendig ist, um während der Fadenendaufnahme eine optimale Positionierung der Saugdüsen zu gewährleisten, deutlich minimiert, sondern es wird auch sichergestellt, dass zumindest bei einem Partiestart an allen Arbeitstellen gleiche Bedingungen gegeben sind.As described in claim 5, it is also provided in an advantageous embodiment of the method that the setting of the yarn end receiving positions for the plurality of suction nozzles of the textile machine takes place centrally on a textile machine's own control unit.
By such a common input is not only the amount of work that is necessary to ensure optimal positioning of the suction nozzles during Fadenendaufnahme significantly minimized, but it is also ensured that at least at a batch start at all workstations are given the same conditions.

Das heißt, der Abstand zwischen der Mündung der Saugdüse und der Oberfläche der Kreuzspule ist zumindest beim Start einer Partie an allen Arbeitsstellen gleich.That is, the distance between the mouth of the suction nozzle and the surface of the cheese is the same at least at the start of a lot at all jobs.

Gemäß Anspruch 6 ist es vorteilhaft, wenn der Abstand der Mündung der Saugdüse zur Oberfläche der Kreuzspule während eines Fadenendsuch- und -aufnahmezyklus' der Saugdüse veränderbar ist. Das heißt, die Fadenendaufnahmestellung der Saugdüse kann sofort korrigiert werden, wenn es innerhalb eines Fadenendsuch- und - aufnahmezyklus' zu einem oder zu mehreren Fehlversuch(en) bei der Fadenendaufnahme kommt, was beispielsweise durch einen innerhalb der Saugdüse angeordneten Sensor detektiert wird.According to claim 6, it is advantageous if the distance of the mouth of the suction nozzle to the surface of the cheese during a Fadenendsuch- and -aufnahmezyklus' of the suction nozzle is variable. That is, the Fadenendaufnahmestellung the suction nozzle can be corrected immediately when it comes within a Fadenendsuch- and - pickup 'to one or more failed attempts (s) at the Fadenendaufnahme, which is detected for example by a sensor disposed within the suction nozzle.

Wenn die Saugdüse, wie im Anspruch 7 beschrieben, während eines Fadenendsuch- und -aufnahmezyklus' Nickbewegungen ausführt, wird im Falle eines Fehlversuches der Abstand der Mündung der Saugdüse zur Oberfläche der Kreuzspule vorteilhafterweise zwischen zwei Nickbewegungen geändert.
Das heißt, vor der zweiten oder dritten Nickbewegung der Saugdüse wird deren Fadenendaufnahmestellung, wenn der Sensor in der Saugdüse kein Signal initiiert, das auf eine erfolgreichen Fadenendaufnahmeversuch schließen lässt, etwas korrigiert.When the suction nozzle, as described in claim 7, performs pitching movements during a yarn end search and pick-up cycle in the case of a miss attempt, the distance of the mouth of the suction nozzle to the surface of the cheese advantageously changed between two pitching movements.
That is, before the second or third pitching movement of the suction nozzle, its yarn end receiving position, when the sensor in the suction nozzle does not initiate a signal indicative of a successful yarn end picking attempt, is somewhat corrected.

Wie im Anspruch 8 beschrieben, kann in alternativer Ausführungsform allerdings auch vorgesehen sein, dass die Saugdüse zunächst stets einen kompletten Fadenendsuch- und - aufnahmezyklus durchführt, wobei der Erfolg, wie vorstehend angedeutet durch eine entsprechende Sensoreinrichtung überwacht wird.As described in claim 8, however, can also be provided in an alternative embodiment, that the suction nozzle always first performs a complete Fadenendsuch- and - recording cycle, the success, as indicated above, is monitored by a corresponding sensor device.

Bei einem erfolglosen Fadenendsuch- und -aufnahmezyklus wird die Position der Fadenendaufnahmestellung der Saugdüse geändert und anschließend mit diesem geänderten Abstand ein neuer Fadenendsuch- und -aufnahmezyklus gestartet.
Das heißt, es wird mit neuem Abstand erneut versucht, das auf die Oberfläche der Kreuzspule aufgelaufene Fadenende aufzunehmen.In an unsuccessful Fadenendsuch- and -aufnahmezyklus the position of the yarn end receiving position of the suction nozzle is changed and then started a new Fadenendsuch- and -aufnahmezyklus with this changed distance.
That is, it is trying again with a new distance to record the accumulated on the surface of the cheese package end.

In vorteilhafter Ausführungsform ist des Weiteren vorgesehen, dass eine Selbst-Optimierung des Abstandes der Mündung der Saugdüse zur Oberfläche der Kreuzspule stattfindet.
Gemäß Anspruch 9 wird beispielsweise in Abhängigkeit von den Erfolgen bzw. Misserfolgen der Fadenendaufnahmeversuche die Fadenendaufnahmestellung der Saugdüse so lange korrigiert, bis die Anzahl der Fehlversuche bei der Fadenendaufnahme minimiert ist.
Die ermittelten Werte für den Abstand können bei späteren Garnpartien als Richtwerte für den Start benutzt werden, wobei diese Werte dann ihrerseits, soweit dies noch möglich ist, optimiert werden.In an advantageous embodiment, it is further provided that a self-optimization of the distance of the mouth of the suction nozzle to the surface of the cross-wound bobbin takes place.
According to claim 9, the yarn end receiving position of the suction nozzle is corrected so long, for example, depending on the successes or failures of the yarn end receiving tests until the number of failed attempts at the Fadenendaufnahme is minimized.
The determined values for the distance can be used as a guideline for the start in later yarn lots, whereby these values are then, in turn, optimized as far as is still possible.

Die Saugdüse kann zum Lösen eines Fadenendes, das durch die Spulenantriebtrommel in die Oberfläche der Kreuzspule eingewalkt wurde, zunächst langsam an die Oberfläche der Kreuzspule herangefahren und vorsichtig auf die Oberfläche aufgesetzt werden (Anspruch 10).
Da die Kreuzspule zu diesem Zeitpunkt außerdem in Abwickelrichtung gedreht wird, läuft das Fadenende gegen die Mündung der Saugdüse und wird dabei von der Oberfläche der Kreuzspule gelöst.
Das gelöste Fadenende wird dann durch die Saugdüse, die inzwischen wieder in einer vorgegebenen Fadenendaufnahmestellung positioniert ist, erfasst und, wie üblich, zur Fadenspleißvorrichtung befördert.The suction nozzle can be moved slowly to the surface of the cheese and slowly placed on the surface for releasing a thread end, which was infiltrated by the bobbin drive drum in the surface of the cheese, (claim 10).
Since the cross-wound bobbin is also rotated in the unwinding direction at this time, the thread end runs against the mouth of the suction nozzle and is thereby released from the surface of the cross-wound bobbin.
The loosened thread end is then detected by the suction nozzle, which in the meantime is again positioned in a predetermined yarn end receiving position, and, as usual, conveyed to the yarn splicing device.

Des Weiteren kann die Saugdüse, wie im Anspruch 11 beschrieben, zur Ermittlung des in die Spulvorrichtung eingelegten Hülsenformates langsam an die Oberfläche der Hülse herangefahren werden.
Dabei wird die Anzahl der Schritte des Schrittmotors bis zum Stoppen der Saugdüse durch Kontakt mit der Oberfläche der Hülse erfasst und zum Beispiel in der textilmaschineneigenen Steuereinheit zur Berechnung des Hülsenformates verarbeitet.Furthermore, the suction nozzle, as described in claim 11, are moved slowly to the surface of the sleeve for determining the inserted into the winding device sleeve format.
In this case, the number of steps of the stepping motor to stop the suction nozzle is detected by contact with the surface of the sleeve and processed, for example, in the textile machine's own control unit for calculating the sleeve format.

In einer alternativen Ausführungsform, die im Anspruch 12 beschrieben ist, ist vorgesehen, dass die Saugdüse zur Ermittlung des in die Spulvorrichtung eingelegten Hülsenformates als Ausgangsposition für die Ermittlung der Fadenendaufnahmestellung langsam an die Oberfläche der Hülse herangefahren wird, dass die Saugdüse nach dem Kontakt mit der Hülse in die Fadenendaufnahmestellung zurückgeschwenkt und dabei aus derIn an alternative embodiment, which is described in claim 12, it is provided that the suction nozzle for determining the inserted into the winding device sleeve format is slowly moved up to the surface of the sleeve as the starting position for determining the Fadenendaufnahmestellung that the suction nozzle after contact with the Sleeve pivoted back into the yarn end receiving position and thereby out of the

Anzahl der Schritte das Hülsenformat berechnet wird.Number of steps the sleeve format is calculated.

Die Arbeitsstellen, an denen das erfindungsgemäße Verfahren eingesetzt wird, verfügen, wie im Anspruch 13 dargelegt, jeweils über eine Spulvorrichtung zum Wickeln einer Auflaufspule sowie über eine Saugdüse zum Aufnehmen eines auf die Oberfläche der Kreuzspule aufgelaufenen Fadenendes.
Die Saugdüse weist dabei einen als Schrittmotor ausgebildeten Antrieb auf, der an eine spulstelleneigene Steuereinrichtung angeschlossen und so ansteuerbar ist, dass die Saugdüse in vorgebbaren Fadenendaufnahmestellungen positionierbar ist, in denen die Mündung der Saugdüse jeweils einen definierten Abstand zur Oberfläche der Kreuzspule aufweist.
Derartige Schrittmotoren ermöglichen auf relativ einfache Weise eine genaue und reproduzierbare Positionierung der Saugdüse.
Das heißt, die Saugdüse kann schnell und problemlos in vorgebbaren Fadenendaufnahmestellungen positioniert werden, wobei der notwendige Steuerungsaufwand relativ gering ist.The jobs where the inventive method is used, as set forth in claim 13, each have a winding device for winding a package and a suction nozzle for receiving a accumulated on the surface of the cross-wound yarn end.
The suction nozzle has a drive designed as a stepper motor, which is connected to a spool point own control device and controllable so that the suction nozzle is positionable in predeterminable Fadenendaufnahmestellungen in which the mouth of the suction nozzle has a defined distance to the surface of the cheese.
Such stepper motors allow a relatively simple way an accurate and reproducible positioning of the suction nozzle.
That is, the suction nozzle can be quickly and easily positioned in predeterminable Fadenendaufnahmestellungen, the necessary control effort is relatively low.

Die im Anspruch 14 beschriebene Ausführungsform, mit spulstelleneigenen Steuereinrichtungen, die an eine zentrale Steuereinheit der Textilmaschine angeschlossen sind, ermöglicht eine gemeinsame Eingabe der Saugdüsen-Einstelldaten.
Das bedeutet, der Abstand zwischen den Mündungen der Saugdüsen der Textilmaschinen und den Oberflächen der in den Spulvorrichtungen gehalterten Kreuzspulen kann von zentraler Stelle aus gemeinsam eingestellt werden, was nicht nur sehr zeitsparend ist, sondern auch gewährleistet, dass alle Saugdüsen, zumindest beim Start einer Partie, gleiche Fadenendaufnahmestellungen aufweisen.The embodiment described in claim 14, with its own control units, which are connected to a central control unit of the textile machine, allows a common input of the suction nozzle setting data.
This means that the distance between the mouths of the suction nozzles of the textile machines and the surfaces of the cheeses held in the winding cheeses can be adjusted together from a central location, which is not only very time-saving, but also ensures that all suction nozzles, at least at the start of a lot have the same Fadenendaufnahmestellungen.

Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles näher erläutert.The invention will be explained in more detail with reference to an embodiment shown in the drawings.

Es zeigen:Show it:

Fig. 1Fig. 1
in Seitenansicht eine Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine, an der das erfindungsgemäße Verfahren durchführbar ist, mit einer Saugdüse, die in ihrer Ausgangsstellung positioniert ist,in side view, a workstation of a cheese-producing textile machine on which the method according to the invention can be carried out, with a suction nozzle, which is positioned in its initial position,
Fig. 2Fig. 2
die Arbeitsstelle gemäß Fig.1, mit einer Saugdüse, die durch ihren als Schrittmotor ausgebildeten Antrieb in einer Fadenendaufnahmestellung positioniert ist.the job according to Fig.1 with a suction nozzle, which is positioned by its drive designed as a stepping motor in a yarn end receiving position.

In den Figuren 1 und 2 ist jeweils schematisch, in Seitenansicht, eine Arbeitsstelle 2 einer insgesamt mit der Bezugszahl 1 gekennzeichneten Kreuzspulen herstellende Textilmaschine dargestellt.
Derartige beispielsweise als Kreuzspulautomaten ausgebildete Textilmaschinen weisen üblicherweise zwischen ihren (nicht dargestellten) Endgestellen eine Vielzahl dieser gleichartigen Arbeitsstellen, im vorliegenden Fall Spulstellen 2, auf.
Auf diesen Spulstellen 2 werden, wie bekannt und daher nicht näher erläutert, die zum Beispiel auf einer Ringspinnmaschine produzierten, relativ wenig Garnmaterial aufweisenden Spinnkopse 3 zu großvolumigen Kreuzspulen 5 umgespult.In the FIGS. 1 and 2 is in each case schematically, in side view, a job 2 of a generally designated by the reference numeral 1 cheesemaking textile machine shown.
For example, textile machines of this type, which are designed, for example, as spooling machines, have a multiplicity of these identical workstations, in this case winding stations 2, between their end frames (not shown).
As is known and therefore not explained in more detail, the spin cords 3, which are produced for example on a ring spinning machine and have relatively few yarn material, are rewound into large-volume cheeses 5 on these winding stations 2.

Solche Kreuzspulautomaten 1 weisen üblicherweise eine Logistikeinrichtung in Form eines Spulen- und Hülsentransportsystems 6 auf, in dem auf Transporttellern 11 Spinnkopse 3 beziehungsweise Leerhülsen umlaufen.
Von diesem Spulen- und Hülsentransportsystem 6 sind in den Figuren lediglich die Kopszuführstrecke 17, die reversierend antreibbare Speicherstrecke 18, eine der zu den Spulstellen 2 führenden Quertransportstrecken 19 sowie die Hülsenrückführstrecke 20 dargestellt.Such automatic packages 1 usually have a logistics device in the form of a bobbin and tube transport system 6, in which 11 spinning cops 3 or empty tubes rotate on transport plates.
Of these coil and sleeve transport system 6, only the Kopszuführstrecke 17, the reversibly drivable storage section 18, one of the leading to the winding units 2 transverse transport sections 19 and the sleeve return path 20 are shown in the figures.

Wie in Figur 1 angedeutet, werden die angelieferten Spinnkopse 3 in einer der Abspulstellungen AS, die sich jeweils im Bereich der Quertransportstrecken 19 an den Spulstellen 2 befinden, zu großvolumigen Kreuzspulen 5 umgespult.
Die einzelnen Spulstellen verfügen zu diesem Zweck, wie bekannt und daher nur angedeutet, über verschiedene Einrichtungen, die einen ordnungsgemäßen Betrieb derartiger Spulstellen 2 gewährleisten.
Diese Einrichtungen sind dabei jeweils an eine arbeitsstelleneigene Steuereinrichtung 31 angeschlossen, wobei die Steuereinrichtung 31 ihrerseits über einen Maschinenbus 33 mit einer zentralen Steuereinheit 32 der Textilmaschine 1 verbunden ist.
Wie in den Figuren weiter angedeutet, weisen derartige Arbeitsstellen 2 unter anderem eine schwenkbar gelagerte Saugdüse 24 sowie ein schwenkbar gelagertes Greiferrohr 25 auf. Die Saugdüse 24 ist dabei um eine Schwenkachse 23 begrenzt drehbar gelagert und weist einen als Schrittmotor ausgebildeten Antrieb 15 auf, der über eine Steuerleitung 36 an die arbeitsstelleneigene Steuereinrichtung 31 angeschlossen ist. Die Saugdüse 24 weist außerdem eine Sensoreinrichtung 41 auf, durch die überprüfbar ist, ob ein Fadenaufnahmeversuch der Saugdüse 24 erfolgreich war.
Des Weiteren ist im Bereich der Saugdüse 24 ein Sensor 40 installiert, mittels dessen der Schwenkwinkel der Saugdüse 24 bei deren Einschwenken in die Fadenendaufnahmestellung kontrolliert werden kann.
Solche Arbeitstellen 2 verfügen in der Regel außerdem über eine Fadenspleißeinrichtung 26, eine Fadenspanneinrichtung 30, einen Fadenreiniger 28, einen Fadenzugkraftsensor 29 sowie einen Unterfadensensor 22.As in FIG. 1 indicated, the delivered spinning cops 3 in one of the Abspulstellungen AS, which are each located in the region of the transverse transport lines 19 at the winding units 2, rewound to large-volume cheeses 5.
For this purpose, the individual winding units have, as is known and therefore only indicated, various devices which ensure the proper operation of such winding units 2.
These devices are each connected to a workstation own control device 31, wherein the control device 31 in turn is connected via a machine bus 33 to a central control unit 32 of the textile machine 1.
As further indicated in the figures, such workstations 2 include, inter alia, a pivotally mounted suction nozzle 24 and a pivotally mounted gripper tube 25. The suction nozzle 24 is rotatably mounted limited to a pivot axis 23 and has a stepper motor designed as a drive 15 which is connected via a control line 36 to the workstation's own control device 31. The suction nozzle 24 also has a sensor device 41, by which it is possible to check whether a thread take-up test of the suction nozzle 24 was successful.
Furthermore, a sensor 40 is installed in the region of the suction nozzle 24, by means of which the pivoting angle of the suction nozzle 24 can be controlled during its pivoting into the yarn end receiving position.
Such work stations 2 generally also have a yarn splicing device 26, a thread tensioning device 30, a thread cleaner 28, a yarn tension force sensor 29 and a lower thread sensor 22.

Die Spulvorrichtung, die insgesamt mit der Bezugszahl 4 gekennzeichnet ist, verfügt über einen Spulenrahmen 8, der um eine Schwenkachse 12 beweglich gelagert ist.
Im vorliegenden Ausführungsbeispiel liegt die im Spulenrahmen 8 frei drehbar gehalterte Kreuzspule 5 während des Spulprozesses mit ihrer Oberfläche 35 auf einer Spulenantriebswalze 9 auf und wird von dieser über Reibschluss angetrieben.
Der vom Spinnkops 3 zur Kreuzspule 5 laufende Faden 16 wird während des Spulprozesses außerdem durch eine Fadenchangiereinrichtung 10, die beispielsweise einen fingerartig ausgebildeten, durch einen elektromechanischen Antrieb 14 beaufschlagten Fadenführer 13 aufweist, zwischen den beiden Stirnseiten der Kreuzspule 5 traversiert.
Solche Changiereinrichtungen sind bekannt und beispielsweise in der DE 198 58 548.9 ausführlich beschrieben.
Im Bereich der Spulvorrichtung 4 ist außerdem eine Kreuzspulentransporteinrichtung 7 angeordnet, über die fertige Kreuzspulen abgefördert werden können.
Wie in Figur 2 angedeutet, kann die Saugdüse 24 mittels des Schrittmotors 15 aus der in Figur 1 dargestellten Ausgangsstellung in eine Fadenendaufnahmestellung geschwenkt werden, in der die Mündung 34 der Saugdüse 24 in einem definierten Abstand a zur Oberfläche 35 der Kreuzspule 5 positioniert ist. Der Abstand a zwischen der Mündung 34 der Saugdüse 24 und der Oberfläche 35 der Kreuzspule 5 kann dabei durch entsprechendes Ansteuern des Schrittmotor 15 exakt eingestellt und jederzeit, beispielsweise in Abhängigkeit der Ergebnisse, die bei der Fadenendaufnahme erzielt werden, korrigiert werden.The winding device, which is generally designated by the reference numeral 4, has a coil frame 8 which is movably mounted about a pivot axis 12.
In the present embodiment, the freely rotatably supported in the coil frame 8 cross-wound bobbin 5 during the winding process with its surface 35 on a bobbin drive roller 9 and is driven by this via frictional engagement.
The running of the spinning cop 3 to the cheese 5 thread 16 is also traversed by a Fadenchangiereinrichtung 10, which has, for example, a finger-trained, acted upon by an electromechanical drive 14 yarn guide 13, between the two end faces of the cheese 5 during the winding process.
Such traversing devices are known and, for example, in the DE 198 58 548.9 described in detail.
In the region of the winding device 4, a cross-coil transport device 7 is also arranged, can be transported through the finished cheeses.
As in FIG. 2 indicated, the suction nozzle 24 by means of the stepping motor 15 from the in FIG. 1 shown starting position are pivoted into a yarn end receiving position in which the mouth 34 of the suction nozzle 24 is positioned at a defined distance a to the surface 35 of the cheese 5. The distance a between the mouth 34 of the suction nozzle 24 and the surface 35 of the cheese 5 can be exactly adjusted by appropriate driving the stepper motor 15 and at any time, for example, depending on the results that are achieved in the Fadenendaufnahme be corrected.

Funktion des erfindungsgemäßen Verfahrens:

  • Wenn an einer Arbeitstelle 2 ein Fadenbruch auftritt oder durch den Fadenreiniger 28 ein definierter Fadenschnitt erfolgt ist, kommt es zunächst zu einem Auflaufen des so genannten Oberfadens auf die Oberfläche 35 der Kreuzspule 5.
Im Anschluss wird durch die arbeitsstelleneigene Steuereinrichtung 31 über die Steuerleitung 36 der Antrieb 15 der Saugdüse 24 so angesteuert, das die Saugdüse 24 nach oben schwenkt.
Das heißt, der als Schrittmotor ausgebildete Antrieb 15 sorgt dafür, dass die Saugdüse 24 in eine Fadenendaufnahmestellung überführt wird, in der zwischen der Mündung 34 der Saugdüse 24 und der Oberfläche 35 der Kreuzspule 5 ein definierter Abstand a gegeben ist.
Während des Einschwenkens der Saugdüse 24 in die Fadenendaufnahmestellung wird die korrekte Winkelstellung der Saugdüse 24 dabei mittels einer Sensoreinrichtung 40 überprüft, die in Richtung auf die Fadenendaufnahmestellung vor dieser positioniert ist.
Die gewünschte Fadenendaufnahmestellung der Saugdüse 24 ist dabei an der arbeitstelleneigenen Steuereinrichtung 31 oder an der zentralen Steuereinheit 32 der Textilmaschine 1 eingebbar. Die Figur 2 zeigt die Saugdüse 24 in einer der möglichen Fadenendaufnahmestellungen.
Wie ersichtlicht, ist die Saugdüse 24 in der Fadenendaufnahmestellungen mit ihrer unterdruckbeaufschlagbaren Mündung 34 in einem Abstand a von der Oberfläche 35 der während der Fadenendaufnahme langsam in Abwickelrichtung 37 drehenden Kreuzspule 5 positioniert.Function of the method according to the invention:
  • If a thread break occurs at a work station 2 or a defined thread cut is made by the thread cleaner 28, the so-called upper thread initially runs onto the surface 35 of the cheese 5.
Subsequently, by the workstation's own control device 31 via the control line 36 of the drive 15 of the suction nozzle 24 is driven so that the suction nozzle 24 pivots upward.
That is, the stepper motor designed as a drive 15 ensures that the suction nozzle 24 is transferred to a yarn end receiving position in which between the mouth 34 of the suction nozzle 24 and the surface 35 of the cheese 5 is given a defined distance a.
During the pivoting of the suction nozzle 24 in the yarn end receiving position, the correct angular position of the suction nozzle 24 is checked by means of a sensor device 40 which is positioned in the direction of the yarn end receiving position in front of this.
The desired yarn end receiving position of the suction nozzle 24 can be entered at the workstation's own control device 31 or at the central control unit 32 of the textile machine 1. The FIG. 2 shows the suction nozzle 24 in one of the possible Fadenendaufnahmestellungen.
As can be seen, the suction nozzle 24 is positioned in the Fadenendaufnahmestellungen with its unterdruckbeaufschlagbaren mouth 34 at a distance a from the surface 35 of the slowly during unwinding in the take-up direction 37 cross-wound bobbin 5 during Fadenendaufnahme.

Eine erfolgreiche Fadenendaufnahme, das heißt die Anwesenheit des Oberfadens in der Saugdüse 24, wird durch eine Sensoreinrichtung 41 detektiert, die innerhalb der Saugdüse 24 angeordnet und über eine entsprechende Signalleitung an die arbeitsstelleneigene Steuereinrichtung 31 angeschlossen ist. Der Arbeitsstellenrechner 31 sorgt bei Eingang eines entsprechenden Signals der Sensoreinrichtung 41 dafür, dass der Schrittmotor 15 die Saugdüse 24 wieder nach unten schwenkt und den aufgenommenen Oberfaden dabei in die Fadenspleißeinrichtung 26 einlegt.
Wenn kein entsprechendes Signal der Sensoreinrichtung 41 eingeht, die Saugdüse 24 den Oberfaden also nicht von der Oberfläche 35 der Kreuzspule 5 aufnehmen konnte, wird die Saugdüse 24 in einer geänderte Fadenendaufnahmestellung positioniert.
Das heißt, der Abstand a zwischen der Mündung 34 der Saugdüse 24 und der Oberfläche 35 der Kreuzspule 5 wird geändert, in der Praxis in der Regel verkleinert.
Gleichzeitig oder nahezu gleichzeitig mit der Fadenendaufnahme des Oberfadens durch die Saugdüse 24 erfolgt auch die Fadenendaufnahme und Fadenendüberführung des Unterfadens.
Das Greiferrohr 25, das vorzugsweise ebenfalls einzelmotorisch angetrieben ist, nimmt den mit dem Spinnkops 3 verbundenen Unterfaden auf, schwenkt nach oben und legt dabei den Unterfaden in die Fadenspleißeinrichtung 26 ein.
In der Fadenspleißeinrichtung 26 werden die Fadenenden von Ober- und Unterfaden zunächst in bekannter Weise vorbereitet und anschließend, wie üblich, pneumatisch zu einem neuen Faden 16 verspleißt.A successful Fadenendaufnahme, that is, the presence of the upper thread in the suction nozzle 24 is detected by a sensor device 41 which is disposed within the suction nozzle 24 and connected via a corresponding signal line to the workstation's own control device 31. The workstation computer 31, upon receipt of a corresponding signal from the sensor device 41, ensures that the stepping motor 15 pivots the suction nozzle 24 down again and inserts the picked-up upper thread into the yarn splicing device 26.
If no corresponding signal of the sensor device 41 is received, the suction nozzle 24 could thus not receive the upper thread from the surface 35 of the cross-wound bobbin 5, the suction nozzle 24 is positioned in a modified Fadenendaufnahmestellung.
That is, the distance a between the mouth 34 of the suction nozzle 24 and the surface 35 of the cheese 5 is changed, usually reduced in practice.
At the same time or almost simultaneously with the Fadenendaufnahme of the upper thread through the suction nozzle 24 also takes the Fadenendaufnahme and Fadenendüberführung the lower thread.
The gripper tube 25, which is preferably also driven by a single motor, receives the lower thread connected to the spinning cop 3, pivots upwards and places the lower thread in the thread splicing device 26.
In the yarn splicing device 26, the yarn ends of upper and lower thread are first prepared in a known manner and then, as usual, pneumatically spliced to form a new thread 16.

Im Anschluss an einen erfolgreichen Spleißprozess kann an der betreffenden Spulstelle der Spulprozess wieder aufgenommen werden.Following a successful splicing process, the winding process can be resumed at the winding unit in question.

Claims (14)

  1. Method for operating a workstation (2) of a textile machine (1) producing cross-wound bobbins, which is equipped with a winding device (4) for winding a take-up bobbin (5) as well as with a suction nozzle (24), which can be driven by a single motor, for receiving a thread end which has run onto the surface (35) of the cross-wound bobbin (5), characterised in that the suction nozzle (24), proceeding from a position of the suction nozzle (24) detected by a sensor, by carrying out a respectively predetermined step number of a stepping motor (15), is positioned in a thread receiving position, in which the mouth (34) of the suction nozzle (24) has a defined spacing (a) from the surface (35) of the cross-wound bobbin (5), wherein the position detected by a sensor is arranged at least so far from the respective thread end receiving position that the latter, in relation to the pivoting angle in the direction of the thread end receiving position, is always located in front of the thread end receiving position.
  2. Method according to claim 1, characterised in that the step number of the stepping motor (15) is adapted in the course of a bobbin travel in such a way that it corresponds with the position change connected therewith of the bobbin surface (35).
  3. Method according to claim 1, characterised in that a motor with a rotor is provided, the rotary movement of which is adapted during the course of a bobbin travel in such a way that it corresponds with the position change connected therewith of the bobbin surface (35).
  4. Method according to claim 1, characterised in that the position detected by a sensor, in order to minimise possible faults, is located close to the thread receiving position, preferably not more than 100 steps in front of the thread end receiving position.
  5. Method according to claim 1, characterised in that the step number for positioning the plurality of suction nozzles (24) of the textile machine (1) in the thread end receiving positions thereof is input centrally at a control unit (32) particular to the textile machine.
  6. Method according to claim 1, characterised in that the spacing (a) between the mouth (34) of the suction nozzle (24) and the surface (35) of the cross-wound bobbin (5) is changed during a thread end search and receiving cycle of the suction nozzle (24).
  7. Method according to claim 6, characterised in that the suction nozzle (24) carries out nodding movements during a thread end search and receiving cycle, a reaction taking place to an unsuccessful thread end receiving attempt, which is detected by a sensor (40), prior to the next nodding movement of the suction nozzle (24) by a change in the spacing (a).
  8. Method according to claim 1, characterised in that after the ending of an unsuccessful thread end search and receiving cycle of the suction nozzle (24), which is detected by a sensor (40), a new thread search and receiving cycle of the suction nozzle (24) is started with a changed spacing (a).
  9. Method according to claim 8, characterised in that, as a function of the success of a plurality of thread end receiving attempts, a self-optimisation of the thread end receiving position of the suction nozzle (24) takes place.
  10. Method according to claim 1, characterised in that the suction nozzle (24) is firstly slowly moved up to the surface (35) of the cross-wound bobbin (5) to release thread ends, which are milled into the surface (35) of the cross-wound bobbin (5), and then positioned in a predetermined thread end receiving position.
  11. Method according to claim 1, characterised in that the suction nozzle (24) is moved up slowly to the surface of the tube to determine the tube format inserted into the winding device (4) as a starting position to determine the thread end receiving position and in that the tube format is calculated from the number of steps of the stepping motor (15) up to the stopping of the suction nozzle (24) by contact with the tube.
  12. Method according to claim 1, characterised in that the suction nozzle (24) is moved up slowly to the surface of the tube to determine the tube format inserted into winding device (4) as the starting position to determine the thread end receiving position, in that the suction nozzle (24), after the contact with the tube, is pivoted back into the thread end receiving position and in the process the tube format is calculated from the number of steps.
  13. Workstation (2) of a textile machine (1) producing cross-wound bobbins, with a winding device (4) for winding a take-up bobbin (5) and a suction nozzle (24) which can be driven by a single motor to receive a thread end which has run onto the surface (35) of the cross-wound bobbin (5), characterised in that the suction nozzle (24) in each case has a drive (15) configured as a stepping motor, which is connected by means of a control line (36) to a control mechanism (31) particular to the winding head and can be activated in such a way that the suction nozzle (24) can be positioned in a thread end receiving position, in which the mouth (34) of the suction nozzle (24) in each case has a defined spacing (a) from the surface (35) of the cross-wound bobbin (5) and wherein the correct angular position of the suction nozzle (24) is checked by means of a sensor device (40) which is positioned in the direction of the thread end receiving position in front of the latter.
  14. Workstation according to claim 13, characterised in that the textile machine (1) has a control unit (32), to which the control mechanisms (31) particular to the winding head are connected and in that the spacing (a) between the mouths (34) of the suction nozzles (24) and the surfaces (35) of the cross-wound bobbins (5) can be adjusted centrally at the control unit (32).
EP07725394.6A 2006-06-08 2007-05-21 Method for operating a workstation of a textile machine which produces crosswound bobbins Active EP2029465B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006026548A DE102006026548A1 (en) 2006-06-08 2006-06-08 Method for operating a workstation of a creel-producing textile machine
PCT/EP2007/004487 WO2007140871A1 (en) 2006-06-08 2007-05-21 Method for operating a workstation of a textile machine which produces crosswound bobbins

Publications (2)

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EP2029465A1 EP2029465A1 (en) 2009-03-04
EP2029465B1 true EP2029465B1 (en) 2016-05-04

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EP (1) EP2029465B1 (en)
CN (1) CN101454231B (en)
DE (1) DE102006026548A1 (en)
WO (1) WO2007140871A1 (en)

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DE102006026548A1 (en) 2007-12-13
CN101454231B (en) 2013-03-20
CN101454231A (en) 2009-06-10
EP2029465A1 (en) 2009-03-04
WO2007140871A1 (en) 2007-12-13

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