EP1590287A1 - Thread take-off device - Google Patents

Thread take-off device

Info

Publication number
EP1590287A1
EP1590287A1 EP04706160A EP04706160A EP1590287A1 EP 1590287 A1 EP1590287 A1 EP 1590287A1 EP 04706160 A EP04706160 A EP 04706160A EP 04706160 A EP04706160 A EP 04706160A EP 1590287 A1 EP1590287 A1 EP 1590287A1
Authority
EP
European Patent Office
Prior art keywords
thread
thread guide
movement
freedom
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04706160A
Other languages
German (de)
French (fr)
Other versions
EP1590287B1 (en
Inventor
Klaus Bartkowiak
Bernd Neumann
Manfred Stüttem
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Saurer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saurer GmbH and Co KG filed Critical Saurer GmbH and Co KG
Publication of EP1590287A1 publication Critical patent/EP1590287A1/en
Application granted granted Critical
Publication of EP1590287B1 publication Critical patent/EP1590287B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/02—Methods or apparatus in which packages do not rotate
    • B65H49/04—Package-supporting devices
    • B65H49/10—Package-supporting devices for one operative package and one or more reserve packages
    • B65H49/12—Package-supporting devices for one operative package and one or more reserve packages the reserve packages being mounted to permit manual or automatic transfer to operating position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/086—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle responsive to completion of unwinding of a package
    • 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
    • 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 thread take-off device according to the preamble of claim 1 and a texturing machine with a thread take-off device according to the invention.
  • Such thread take-off devices are known from WO 00/21866 A2.
  • the end of the Norlages bobbin is connected to the beginning of the thread of a reserve bobbin. The connection is carried out in such a way that the thread continues to run smoothly from the reserve spool after the norage spool has run dry.
  • connection is usually made by knotting or splicing.
  • the resulting thickening in the thread represents an inevitable reduction in quality in the subsequent process.
  • WO 00/21866 A2 proposes to use a sensor to sense the transition from the supply spool to the reserve spool and to react to it in the processing process.
  • this object is achieved in that the sensor has a means which, due to its geometry, prevents the thread guide from rebounding into the rest position.
  • the advantage of the invention is that the thread guide is prevented from rebounding regardless of the speed at which it is moved into the reporting position and thus works reliably.
  • This is achieved by creating a second degree of freedom of movement in addition to the movement of the thread guide from the rest position to the reporting position. By coordinating the second accordingly Degree of freedom of movement with the first degree of freedom of movement ensures that the movement of the thread guide from the rest position into the reporting position is different than in the opposite direction. In the embodiment of the thread take-off device according to the invention, this is used to block the return path of the thread guide after rebounding.
  • the second degree of freedom of movement is realized by a pawl, which can run over a catch in the direction of the reporting position at high speed of the thread guide, while blocking the movement in the opposite direction.
  • This pawl can either be integrated in the fixed part of the sensor or be provided directly on the thread guide. At a standstill, the lock must be able to be canceled or removed manually.
  • the thread guide itself is movable in two degrees of freedom of movement.
  • the thread guide interacts with a curve that coordinates the degrees of freedom of movement of the thread guide. This curve is designed so that the thread guide is initially guided on a first part of the curve when moving from the rest position to the reporting position. When the signaling position is reached, the thread guide is guided to a second part of the curve at its speed and inertia, in which movement back to the rest position is blocked.
  • the second part of the curve is shaped in such a way that the thread guide can go through this curve several times and thus reduce its kinetic energy by means of friction.
  • the second part of the curve has a circular path that repeatedly guides the thread guide back to the end position so that it does not leave the reporting position. Once the thread guide is at rest, it can easily be returned to its rest position on the first part of the curve by an operator who changes the supply bobbins.
  • the thread take-off device according to the invention is used on a texturing machine for texturing and winding threads, in that the texturing machine draws the thread from the thread take-off device via a delivery mechanism.
  • Fig. 3 shows a further embodiment of the sensor of the thread take-off device.
  • FIG. 1 shows a thread take-off device 1 according to the invention and schematically a texturing machine (10 to 17).
  • a continuous thread 2 is provided in the thread take-off device 1.
  • the thread 2 is drawn off from a supply spool 4.1, which is provided at a first supply point 3.1, via a thread guide 9.
  • the thread end 5.1 of the supply spool 4.1 has been led out of the lifting area when the supply spool is spooled inside the spool and can therefore be connected to the thread beginning of a reserve spool 4.2, which is provided at a second supply point 3.2, by means of a binding 5.3. If the supply spool 4.1 is now completely unwound, the connection between the thread end 5.1 and the thread start 5.2 is tensioned, so that the thread 2 is pulled out of the sensor 6. This event is recognized by the sensor 6 and passed on as a signal 7 to a signal processing 8.
  • the thread 2 is first required in the texturing machine by a first delivery unit 10, which also builds up the thread tension required for the thread take-up.
  • the thread is first heated in a heater 11 and cooled in a cooling rail 12 so that a twist applied to the thread 2 by the texturing unit 13 is fixed.
  • the thread is then drawn off from a second delivery unit 14, heated again in a second heater 15, and fed to the winding 17 via a third delivery unit 16.
  • the Aufwicldung consists of a traverse 17.1, which traverses the thread 2 transversely to the axis of the bobbin 17.3 and a drive roller 17.2, which presses the thread 2 onto the bobbin 17.3 and drives it at the same time.
  • the sensor 6 is shown in detail in FIG.
  • the sensor 6 essentially consists of an insertion slot 19 introduced into a thread guide carrier 18, and a thread guide 20.
  • the thread guide 20 is rotatably mounted about the axis of rotation 21.
  • the thread guide 20 is shown in the rest position 20.1.
  • the thread 2 is inserted behind the thread guide 20 such that a thread tension, as occurs when the thread passes from the supply spool 4.1 to the reserve spool 4.2 from FIG. 1, pulls the thread 2 out of the feed slot 19 and thereby the thread guide 20 from the Rest position 20.1 in the reporting position 20.2.
  • This change in position is detected by a switch 28.
  • a mechanical cam switch is shown here as representative of other switching principles, such as optical, inductive, capacitive switches.
  • the tip of the thread guide 20 in the area of the insertion slot 19 is fork-shaped here. This has the advantage that the thread guide 20 is moved together with the thread 2 from the signaling position 20.2 to the rest position 20.1 in one operating step when the thread 2 is inserted into the threading slot 19.
  • the movement of the thread guide 20 during the transition of the thread 2 from the supply spool 4.1 to the reserve spool 4.2 is described below.
  • the thread 2 is pulled laterally out of the insertion slot 19 at the thread tension.
  • very high accelerations act on the thread guide 20.
  • the thread guide 20 rotates at high speed around the axis of rotation 21 in the direction of the reporting position 20.2.
  • the steep flank on the back of the catch 27 prevents the pawl 22 from passing over the catch in the opposite direction and thus prevents the spring from rebounding Thread guide 20 in the rest position 20.1.
  • the thread guide 20 is connected to the thread guide carrier 18 by means of a push rotary joint 29.
  • the curve 31 is divided into a first part 31.1 for the movement of the thread guide 20 from the rest position 20.1 into the reporting position 20.2 and a second part 31.2 for the movement of the thread guide 20 after reaching the reporting position 20.2.
  • the thread guide 20 executes a movement which is determined by the guidance of the cam 30 in the first part 30.1 of the curve 31.
  • this is a pivoting movement about the pivot point of the thrust swivel joint 29. This applies until the reporting position 20.2 is reached.
  • the cam 30 is guided into the second part 31.2 of the curve 31.
  • the second part 31.2 of curve 31 represents a circular path. This circular path is designed in such a way that the thread guide 20 can bounce back in an orderly manner, but prevents the thread guide 20 from leaving the area of the reporting position 20.2.
  • the cam 30 runs through the circular path one or more times and thereby reduces the kinetic energy of the thread guide 20. Due to the circular movement of the cam 30, the thread guide 20 executes a combined pivoting / pushing movement with a small amplitude. The thrust movement in the thrust rotary joint 29 removes energy from the thread guide 20 due to the friction. Because of the limited space available, the cam is ideally frustoconical. In this way, a high bending strength of the cam can be achieved despite the small design.

Abstract

A yarn withdrawal apparatus for continuously withdrawing a yarn from a feed yarn package and then from a reserve package, where the trailing yarn end on the feed package is knotted to the leading end of the yarn on the reserve package. The transition of the yarn from the feed yarn package to the reserve yarn package is detected by a sensor, which includes a movable yarn guide, which moves during the transition from an inactive position to a signaling position in a first degree of freedom of movement. To prevent the movable yarn guide from rebounding when it reaches the signaling position, the yarn guide or an element connected thereto defines a second degree of freedom of movement which is different from the first degree of freedom of movement, and such that after the rebound the movement is of such a kind that a departure from the signaling position back toward the inactive position is geometrically not possible.

Description

Fadenabzugsvorrichtung Yarn withdrawal device
Die Erfindung betrifft eine Fadenabzugsvorrichtung gemäß dem Oberbegriff des Anspruchs 1 sowie eine Texturiermaschine mit einer erfindungsgemäßen Fadenabzugsvorrichtung. Derartige Fadenabzugsvorrichtungen sind aus der WO 00/21866 A2 bekannt. Um in einem Faden verarbeitenden Prozess, in dem ein Faden von einer Norlagespule abgezogen und weiterverarbeitet wird, einen kontinuierlichen Prozessablauf zu gewährleisten, wird das Fadenende der Norlagespule mit dem Fadenanfang einer Reservespule verbunden. Dabei wird die Verbindung so ausgeführt, dass der Faden störungsfrei nach Leerlaufen der Norlagespule weiter von der Reservespule abläuft.The invention relates to a thread take-off device according to the preamble of claim 1 and a texturing machine with a thread take-off device according to the invention. Such thread take-off devices are known from WO 00/21866 A2. In order to ensure a continuous process flow in a thread processing process, in which a thread is drawn from a Norlages bobbin and further processed, the end of the Norlages bobbin is connected to the beginning of the thread of a reserve bobbin. The connection is carried out in such a way that the thread continues to run smoothly from the reserve spool after the norage spool has run dry.
Die Verbindung wird in der Regel durch Verknoten oder Verspleißen hergestellt. Die dabei entstehende Verdicku g im Faden stellt eine unvermeidliche Qualitätsminderang im Folgeprozess dar. Aus diesem Grund schlägt die WO 00/21866 A2 vor, den Übergang von der Vorlagespule auf die Reservespule durch einen Sensor zu sensieren, und im Verarbeitungsprozess darauf zu reagieren.The connection is usually made by knotting or splicing. The resulting thickening in the thread represents an inevitable reduction in quality in the subsequent process. For this reason, WO 00/21866 A2 proposes to use a sensor to sense the transition from the supply spool to the reserve spool and to react to it in the processing process.
Dies wird durch einen Sensor, der zwischen den Spulen vorgesehen ist und mittels eines bewegbaren Fadenführers, dessen Bewegung durch den Fadenwechsel zwischen den Spulen ausgelöst wird und dessen Position detektiert wird, sensiert. Das Problem, das hierbei auftritt, ist, dass der bewegliche Fadenführer durch den schnell laufenden Faden in sehr kurzer Zeit auf eine sehr hohe Geschwindigkeit aus der Ruheposition in Richtung Meldeposition beschleunigt wird. Dabei ist es möglich, dass der Fadenfuhrer in der Meldeposition an seinem Anschlag reflektiert wird und in die Ruheposition zurückfallt. Es ist zwar möglich, diesen kurzen Aufenthalt zu detektieren und elektrisch zu speichern, jedoch ist es aus der Sicht der schnellen und leichteren Bedienbarkeit und der Betriebssicherheit bei elektrischen Störungen unerwünscht, dass sich der Fadenfuhrer im freigegebenen Zustand in der Ruheposition befindet.This is sensed by a sensor which is provided between the bobbins and by means of a movable thread guide, the movement of which is triggered by the thread change between the bobbins and the position of which is detected. The problem that arises here is that the movable thread guide is accelerated from the rest position towards the reporting position in a very short time by the fast running thread. It is possible that the thread guide is reflected at its stop in the reporting position and falls back into the rest position. It is possible to detect this short stay and to store it electrically, but from the point of view of quick and easy usability and operational safety electrical interference undesirable that the thread guide is in the rest position in the released state.
Naheliegende Lösungsansätze wie beispielsweise weich dämpfende Anschlags- materialien fuhren nicht zum Ziel. Dies gilt auch für Schüttgutfüllungen, die im Fadenführer integriert sind, oder andere dämpfende aufgebrachte Zusatzmassen. Der Grund ist darin zu suchen, dass aufgrund der geringen Masse des Fadenführers in Kombination mit einer hohen Geschwindigkeit bereits eine geringe nicht gedämpfte Restenergie ausreicht, um den Fadenf hrer in seine Ruheposition zu reflektieren. Daher führten auch andere naheliegende Lösungen wie bistabile Lagen mit Hilfe von Permanentmagneten nicht zum Ziel. Ebenfalls sind Luftdämpfüng und elektromagnetisch wirkende Dämpfer nicht geeignet, die geforderten hohen Dämpfungskräfte aufzubringen. Als zusätzliche Schwierigkeit ist hier die Tatsache anzusehen, dass die Geschwindigkeit, mit der der Fadenführer in die Meldeposition bewegt wird, sehr stark streut. Daher ist es kaum möglich, beispielsweise eine Reibbremse so einzustellen, dass sie sowohl bei hohen als auch bei niedrigem Geschwindigkeiten des Fadenführers gleichermaßen betriebssicher wirkt.Obvious solutions such as soft damping stop materials do not lead to the goal. This also applies to bulk material fillings that are integrated in the thread guide or other damping applied additional masses. The reason for this is that due to the low mass of the thread guide in combination with a high speed, a small undamped residual energy is sufficient to reflect the thread guide into its rest position. Therefore, other obvious solutions such as bistable positions with the help of permanent magnets did not lead to the goal. Air damping and electromagnetic dampers are also not suitable for applying the required high damping forces. An additional difficulty is the fact that the speed at which the thread guide is moved into the reporting position is very varied. It is therefore hardly possible, for example, to set a friction brake in such a way that it acts in an operationally reliable manner both at high and at low speeds of the thread guide.
Es ist daher Aufgabe der Erfindung, eine Fadenabzugsvorrichtung mit einem beweglichen Fadenfuhrer bereitzustellen, bei der der Fadenführer auch bei variierenden Geschwindigkeiten zuverlässig am zurückprallen gehindert wird.It is therefore an object of the invention to provide a thread take-off device with a movable thread guide, in which the thread guide is reliably prevented from rebounding even at varying speeds.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass der Sensor ein Mittel aufweist, das auf Grund seiner Geometrie den Fadenführer daran hindert, in die Ruheposition zurückzuprallen. Der Vorteil der Erfindung liegt darin, dass der Fadenführer unabhängig von der Geschwindigkeit, mit der er in die Meldeposition bewegt wird, ein Zurückprallen gehindert wird und somit zuverlässig arbeitet. Dies wird dadurch erreicht, dass zusätzlich zu der Bewegung des Fadenführers von der Ruheposition in die Meldeposition ein zweiter Bewegungsfreiheitsgrad geschaffen wird. Durch eine entsprechende Koordination des zweiten Bewegungsfreiheitsgrades mit dem ersten Bewegungsfreiheitsgrad wird erreicht, dass sich die Bewegung des Fadenführers von der Ruheposition in die Meldeposition anderes darstellt als in umgekehrter Richtung. In der erfindungsgemäßen Ausführung der Fadenabzugsvorrichtung wird dies genutzt, um den Rückweg des Fadenführers nach dem Zurückprallen zu blockieren.According to the invention, this object is achieved in that the sensor has a means which, due to its geometry, prevents the thread guide from rebounding into the rest position. The advantage of the invention is that the thread guide is prevented from rebounding regardless of the speed at which it is moved into the reporting position and thus works reliably. This is achieved by creating a second degree of freedom of movement in addition to the movement of the thread guide from the rest position to the reporting position. By coordinating the second accordingly Degree of freedom of movement with the first degree of freedom of movement ensures that the movement of the thread guide from the rest position into the reporting position is different than in the opposite direction. In the embodiment of the thread take-off device according to the invention, this is used to block the return path of the thread guide after rebounding.
In einer Ausführungsvariante der erfindungsgemäßen Fadenabzugsvorrichtung wird der zweite Bewegungsfreiheitsgrad durch eine Klinke realisiert, die bei hoher Geschwindigkeit des Fadenführers eine Raste in Richtung der Meldeposition überfahren kann, während sie in umgekehrter Richtung die Bewegung sperrt. Diese Klinke kann sowohl in dem feststehenden Teil des Sensors integriert sein als auch direkt am Fadenfuhrer vorgesehen sein. Im Stillstand muss die Sperrung sich aufheben oder manuell entfernt werden können.In an embodiment variant of the thread take-off device according to the invention, the second degree of freedom of movement is realized by a pawl, which can run over a catch in the direction of the reporting position at high speed of the thread guide, while blocking the movement in the opposite direction. This pawl can either be integrated in the fixed part of the sensor or be provided directly on the thread guide. At a standstill, the lock must be able to be canceled or removed manually.
In einer anderen, bevorzugten Ausführungsvariante ist der Fadenführer selbst in zwei Bewegungsfreiheitsgraden beweglich. Der Fadenführer wirkt mit einer Kurve zusammen, die die Bewegungsfreiheitsgrade des Fadenführers koordiniert. Diese Kurve ist so gestaltet, dass der Fadenführer bei seiner Bewegung von der Ruheposition in die Meldeposition zunächst auf einem ersten Teil der Kurve geführt wird. Bei Erreichen der Meldeposition wird der Fadenführer auf Grand seiner Geschwindigkeit und Massenträgheit in einen zweiten Teil der Kurve geleitet, in der eine Bewegung zurück in die Ruheposition blockiert ist.In another preferred embodiment variant, the thread guide itself is movable in two degrees of freedom of movement. The thread guide interacts with a curve that coordinates the degrees of freedom of movement of the thread guide. This curve is designed so that the thread guide is initially guided on a first part of the curve when moving from the rest position to the reporting position. When the signaling position is reached, the thread guide is guided to a second part of the curve at its speed and inertia, in which movement back to the rest position is blocked.
In einer Weiterbildung dieser Ausführungsvariante ist der zweite Teil der Kurve so geformt, dass der Fadenführer diese Kurve mehrfach durchlaufen kann und somit seine kinetische Energie durch Reibleistung abbaut. Im idealen Fall weist der zweite Teil der Kurve eine Kreisbahn auf, die den Fadenfuhrer wiederholt in die Endlage zurückführt, so dass er die Meldeposition nicht verlässt. Ist der Fadenführer einmal in Ruhe, kann er dann leicht durch einen Bediener, der die Vorlagespulen wechselt, auf dem ersten Teil der Kurve in seine Ruheposition zurückgeführt werden. Die erfϊndungsgemäße Fadenabzugsvorrichtung wird an einer Texturiermaschine zum Texturieren und Aufspulen von Fäden eingesetzt, indem die Texturiermaschine den Faden über ein Lieferwerk von der Fadenabzugsvorrichtung abzieht.In a further development of this embodiment variant, the second part of the curve is shaped in such a way that the thread guide can go through this curve several times and thus reduce its kinetic energy by means of friction. In the ideal case, the second part of the curve has a circular path that repeatedly guides the thread guide back to the end position so that it does not leave the reporting position. Once the thread guide is at rest, it can easily be returned to its rest position on the first part of the curve by an operator who changes the supply bobbins. The thread take-off device according to the invention is used on a texturing machine for texturing and winding threads, in that the texturing machine draws the thread from the thread take-off device via a delivery mechanism.
Ein Ausführangsbeispiel wird im folgenden unter Hinweis auf die beigefügten Zeichnungen näher beschrieben.An exemplary embodiment is described below with reference to the accompanying drawings.
Es stellen dar:They represent:
Fig. 1 Eine erfindungsgemäße Fadenabzugsvorrichtung sowie schematisch eine Texturiermaschine,1 a thread take-off device according to the invention and schematically a texturing machine,
Fig. 2 eine Ausführungsvariante des Sensors der Fadenabzugsvorrichtung,2 shows an embodiment variant of the sensor of the thread take-off device,
Fig. 3 eine weitere Ausführungsvariante des Sensors der Fadenabzugsvorrichtung.Fig. 3 shows a further embodiment of the sensor of the thread take-off device.
In Figur 1 ist eine erfindungsgemäße Fadenabzugsvorrichtung 1 und schematisch eine Texturiermaschine (10 bis 17) dargestellt.FIG. 1 shows a thread take-off device 1 according to the invention and schematically a texturing machine (10 to 17).
In der Fadenabzugsvorrichtung 1 wird ein kontinuierlicher Faden 2 bereitgestellt. Dazu wird der Faden 2 von einer Vorlagespule 4.1, die an einer ersten Vorlagestelle 3.1 vorgesehen ist, über einen Fadenführer 9 abgezogen. Das Fadenende 5.1 der Vorlagespule 4.1 ist beim Aufspulen der Vorlagespule in Inneren der Spule aus dem Hubbereich herausgeführt worden und kann daher mit dem Fadenanfang einer Reservespule 4.2, die an einer zweiten Vorlagestelle 3.2 vorgesehen ist, mittels einer Bindung 5.3 verbunden werden. Ist nun die Vorlagespule 4.1 vollständig abgewickelt, spannt sich die Verbindung des Fadenendes 5.1 und des Fadenanfangs 5.2, so dass der Faden 2 aus dem Sensor 6 herausgezogen wird. Dieses Ereignis wird von dem Sensor 6 erkannt und als Signal 7 an eine Signalverarbeitung 8 weitergeleitet.A continuous thread 2 is provided in the thread take-off device 1. For this purpose, the thread 2 is drawn off from a supply spool 4.1, which is provided at a first supply point 3.1, via a thread guide 9. The thread end 5.1 of the supply spool 4.1 has been led out of the lifting area when the supply spool is spooled inside the spool and can therefore be connected to the thread beginning of a reserve spool 4.2, which is provided at a second supply point 3.2, by means of a binding 5.3. If the supply spool 4.1 is now completely unwound, the connection between the thread end 5.1 and the thread start 5.2 is tensioned, so that the thread 2 is pulled out of the sensor 6. This event is recognized by the sensor 6 and passed on as a signal 7 to a signal processing 8.
Nach Verlassen der Fadenabzugsvorrichtung 1 wird der Faden 2 zunächst in der Texturiermaschine von einem ersten Lieferwerk 10 gefordert, das auch die für den Fadenäbzug erforderliche Fadenspannung aufbaut. In der Texturiermaschine wird der Faden zunächst in einem Heizer 11 erhitzt, und in einer Kühlschiene 12 so abgekühlt, dass ein durch das Texturieraggregat 13 auf den Faden 2 aufgebrachter Drall fixiert wird. Anschließend wird der Faden von einem zweiten Lieferwerk 14 abgezogen, in einem zweiten Heizer 15 noch einmal erhitzt, und über ein drittes Lieferwerk 16 der Aufwicklung 17 zugeführt. Die Aufwicldung besteht aus einer Changierung 17.1, die den Faden 2 quer zur Achse der Spule 17.3 changiert und einer Treibwalze 17.2, die den Faden 2 auf die Spule 17.3 aufdrückt und diese zugleich antreibt. Es ist nachvollziehbar, dass eine durch den Prozess durchlaufende Bindung 5.3 einen Fehler in texturierten Garn darstellt. Daher ist es wichtig, eine durch den Prozess durchgelaufene Bindung 5.3 mit einem Sensor zu erkennen und entsprechend zu reagieren. Dies kann dadurch geschehen, dass die zu diesem Zeitpunkt erzeugte Spule 17.3 als fehlerhaft klassifiziert wird, oder dass zu diesem Zeitpunkt auch ein Wechsel der Spule 17.3 stattfindet, so dass der fehlerhafte Abschnitt des Garnes 2 nicht mit aufgespult wird.After leaving the thread take-off device 1, the thread 2 is first required in the texturing machine by a first delivery unit 10, which also builds up the thread tension required for the thread take-up. In the texturing machine, the thread is first heated in a heater 11 and cooled in a cooling rail 12 so that a twist applied to the thread 2 by the texturing unit 13 is fixed. The thread is then drawn off from a second delivery unit 14, heated again in a second heater 15, and fed to the winding 17 via a third delivery unit 16. The Aufwicldung consists of a traverse 17.1, which traverses the thread 2 transversely to the axis of the bobbin 17.3 and a drive roller 17.2, which presses the thread 2 onto the bobbin 17.3 and drives it at the same time. It is understandable that a bond 5.3 running through the process represents an error in textured yarn. It is therefore important to recognize a bond 5.3 that has gone through the process with a sensor and to react accordingly. This can be done by classifying the bobbin 17.3 generated at this point in time as faulty, or by changing the bobbin 17.3 at this point in time, so that the faulty section of the yarn 2 is not also wound up.
In Figur 2 ist im Detail der Sensor 6 dargestellt. Der Sensor 6 besteht im wesentlichen aus einem in einen Fadenführerträger 18 eingebrachten Einlegeschlitz 19, und einem Fadenführer 20. Der Fadenführer 20 ist um die Drehachse 21 drehbar gelagert. In der Figur 2 ist der Fadenführer 20 in der Ruheposition 20.1 dargestellt. Der Faden 2 ist so hinter dem Fadenfuhrer 20 eingelegt, dass eine Fadenspannung, wie sie beim Übergang des Fadens von der Vorlagespule 4.1 auf die Reservespule 4.2 aus Figur 1 auftritt, den Faden 2 aus dem Anlegeschlitz 19 heraus zieht und dabei den Fadenführer 20 von der Ruheposition 20.1 in die Meldeposition 20.2 mitnimmt. Diese Lageänderung wird durch einen Schalter 28 detektiert. Stellvertretend für andere Schaltprinzipien, wie optische, induktive, kapazitive Schalter, ist hier ein mechanischer Nockenschalter dargestellt. Die Spitze des Fadenführers 20 im Bereich des Einlegeschlitzes 19 ist hier gabelförmig ausgeführt. Dies hat den Vorteil, dass der Fadenfuhrer 20 beim Einlegen des Fadens 2 in den Einfadelschlitz 19 in einem Bedienschritt zusammen mit dem Faden 2 von der Meldeposition 20.2 in die Ruheposition 20.1 bewegt wird.The sensor 6 is shown in detail in FIG. The sensor 6 essentially consists of an insertion slot 19 introduced into a thread guide carrier 18, and a thread guide 20. The thread guide 20 is rotatably mounted about the axis of rotation 21. In Figure 2, the thread guide 20 is shown in the rest position 20.1. The thread 2 is inserted behind the thread guide 20 such that a thread tension, as occurs when the thread passes from the supply spool 4.1 to the reserve spool 4.2 from FIG. 1, pulls the thread 2 out of the feed slot 19 and thereby the thread guide 20 from the Rest position 20.1 in the reporting position 20.2. This change in position is detected by a switch 28. A mechanical cam switch is shown here as representative of other switching principles, such as optical, inductive, capacitive switches. The tip of the thread guide 20 in the area of the insertion slot 19 is fork-shaped here. This has the advantage that the thread guide 20 is moved together with the thread 2 from the signaling position 20.2 to the rest position 20.1 in one operating step when the thread 2 is inserted into the threading slot 19.
Nachfolgend wird die Bewegung des Fadenführers 20 beim Übergang des Fadens 2 von der Vorlagespule 4.1 auf die Reservespule 4.2 beschrieben. Auf Grand der Fadenspannung wird der Faden 2 seitlich aus dem Einlegeschlitz 19 herausgezogen. Bei hohen Fadengeschwindigkeiten von mehreren Hundert Metern pro Minute wirken sehr hohe Beschleunigungen auf den Fadenführer 20. Der Fadenführer 20 dreht sich mit hoher Geschwindigkeit um die Drehachse 21 in Richtung der Meldeposition 20.2. Die Klinke 22, die mittels der Klinkenfeder 23 gegen die Klinkenkurve 26 gedrückt wird, überfahrt die Raste 27. Die steile Flanke auf der Rückseite der Raste 27 verhindert, dass die Klinke 22 die Raste in der umgekehrten Richtung überfahren kann und verhindert somit ein Rückprallen des Fadenführers 20 in die Ruheposition 20.1. Ein zusätzliches in den Fadenführer 20 eingebrachtes System aus einer Zugfeder 25 und einer Masse 24, in der die Klinke 22 und die Klinkenfeder 23 untergebracht sind, bewirkt, dass die Klinke 22 nur bei hohen Geschwindigkeiten mit der Kli kenkurve 26 ∑-usammenwirkt. Auf Grund der Reibung zwischen der Masse 24 und dem Fadenf hrer 20 kann diese während des Zurückprallens nicht in ihre Ruhelage zurückfedern. Erst wenn der Fadenführer 20 zur Ruhe gekommen ist, wird die Masse 24 und damit die Klinke 22 zurückgezogen und der Bediener kann den Fadenführer 20 wie oben beschrieben in seine Ruheposition 20.1 bewegen. Ebenfalls möglich, aber hier nicht weiter erläutert, ist eine Integration der Klinke 22 in den feststehenden Fadenführerträger 18. Auch ist es möglich, die beschriebenen Elemente Klinke 22, Klinkenfeder 23, Masse 24 und Feder 25 zum Beispiel durch biegeweiche Festkörpergelenke in den Fadenführer 20 zu integrieren.The movement of the thread guide 20 during the transition of the thread 2 from the supply spool 4.1 to the reserve spool 4.2 is described below. The thread 2 is pulled laterally out of the insertion slot 19 at the thread tension. At high thread speeds of several hundred meters per minute, very high accelerations act on the thread guide 20. The thread guide 20 rotates at high speed around the axis of rotation 21 in the direction of the reporting position 20.2. The pawl 22, which is pressed against the pawl curve 26 by means of the pawl spring 23, passes over the catch 27. The steep flank on the back of the catch 27 prevents the pawl 22 from passing over the catch in the opposite direction and thus prevents the spring from rebounding Thread guide 20 in the rest position 20.1. An additional system introduced into the thread guide 20 from a tension spring 25 and a mass 24, in which the pawl 22 and the pawl spring 23 are accommodated, causes the pawl 22 to interact with the pawl curve 26 only at high speeds. Due to the friction between the mass 24 and the thread guide 20, it cannot spring back into its rest position during the rebound. Only when the thread guide 20 has come to rest is the mass 24 and thus the pawl 22 withdrawn and the operator can move the thread guide 20 into its rest position 20.1 as described above. Also possible, but not explained further here, is an integration of the pawl 22 in the fixed thread guide carrier 18. It is also possible to use the described pawl elements 22, pawl spring 23, mass 24 and spring 25 can be integrated into the thread guide 20, for example by flexible solid joints.
In Figur 3 ist im Detail eine andere Ausfuh ungsvariante des Sensors 6 beschrieben. Hier ist der Fadenführer 20 mit einem Schub- Drehgelenk 29 mit dem Fadenführerträger 18 verbunden. Ein Nocken 30, der in einer Kurve 31 geführt wird, koordiniert den rotatorischen und translatorischen Freiheitsgrad. Die Kurve 31 ist in einen ersten Teil 31.1 für die Bewegung des Fadenführers 20 von der Ruheposition 20.1 in die Meldeposition 20.2 und einen zweiten Teil 31.2 für die Bewegung des Fadenführers 20 nach Erreichen der Meldeposition 20.2 unterteilt.Another embodiment of the sensor 6 is described in detail in FIG. Here, the thread guide 20 is connected to the thread guide carrier 18 by means of a push rotary joint 29. A cam 30, which is guided in a curve 31, coordinates the rotational and translational degrees of freedom. The curve 31 is divided into a first part 31.1 for the movement of the thread guide 20 from the rest position 20.1 into the reporting position 20.2 and a second part 31.2 for the movement of the thread guide 20 after reaching the reporting position 20.2.
Aufbauend auf der Beschreibung zu Figur 2 wird die Bewegung des Fadenführers 20 beim Fadenwechsel beschrieben. Zunächst führt der Fadenführer ausgehend von der Ruheposition 20.1 eine Bewegung, die durch die Führung des Nockens 30 in dem ersten Teil 30.1 der Kurve 31 bestimmt wird, aus. In der Figur 3 ist dies eine Schwenkbewegungum den Drehpunkt des Schub-Drehgelenkes 29. Dies trifft bis zum Erreichen der Meldeposition 20.2 zu. Dort wird der Nocken 30 in den zweiten Teil 31.2 der Kurve 31 geführt. Der zweite Teil 31.2 der Kurve 31 stellt eine Kreisbahn dar. Diese Kreisbahn ist so gestaltet, dass ein geordnetes Zurückprallen des Fadenführers 20 zulassen wird, jedoch verhindert wird, dass der Fadenführer 20 den Bereich der Meldeposition 20.2 verlässt. Statt dessen durchläuft der Nocken 30 ein- oder mehrfach die Kreisbahn und baut dabei die kinetische Energie des Fadenführers 20 ab. Auf Grund der Kreisbewegung des Nockens 30 führt der Fadenfuhrer 20 eine kombinierte Schwenk-/ Schub- Bewegung mit kleiner Amplitude aus. Durch die Schubbewegung im Schub- Drehgelenk 29 wird auf Grund der Reibung dem Fadenführer 20 Energie entzogen. Wegen der geringeren Platzverhältnisse wird der Nocken idealerweise kegelstumpfförmig ausgeführt. Dadurch kann trotz kleiner Bauform eine hohe Biegefestigkeit des Nockens erreicht werden. Building on the description of FIG. 2, the movement of the thread guide 20 when changing the thread is described. First, starting from the rest position 20.1, the thread guide executes a movement which is determined by the guidance of the cam 30 in the first part 30.1 of the curve 31. In Figure 3, this is a pivoting movement about the pivot point of the thrust swivel joint 29. This applies until the reporting position 20.2 is reached. There, the cam 30 is guided into the second part 31.2 of the curve 31. The second part 31.2 of curve 31 represents a circular path. This circular path is designed in such a way that the thread guide 20 can bounce back in an orderly manner, but prevents the thread guide 20 from leaving the area of the reporting position 20.2. Instead, the cam 30 runs through the circular path one or more times and thereby reduces the kinetic energy of the thread guide 20. Due to the circular movement of the cam 30, the thread guide 20 executes a combined pivoting / pushing movement with a small amplitude. The thrust movement in the thrust rotary joint 29 removes energy from the thread guide 20 due to the friction. Because of the limited space available, the cam is ideally frustoconical. In this way, a high bending strength of the cam can be achieved despite the small design.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1. Fadenabzugsvorrichtung1. Thread take-off device
2. Faden2nd thread
3.1 erste Vorlagestelle3.1 first submission point
3.2 zweite Vorlagestelle3.2 second submission point
4.1 Vorlagespule4.1 Supply spool
4.2 Reservespule4.2 Reserve spool
5.1 Fadenende5.1 Thread end
5.2 Fadenanfang5.2 Thread start
5.3 Bindung5.3 Binding
6. Sensor6. Sensor
7. Signal7th signal
8. Signalverarbeitung8. Signal processing
9. Fadenführer9. Thread guide
10. erstes Lieferwerk10. first delivery plant
11. Heizer11. Heater
12. Kühlschiene12. Cooling rail
13. Texturieraggregat13. Texturing unit
14. zweites Lieferwerk14. second delivery plant
15. zweiter Heizer15. second heater
16. drittes Lieferwerk16. third delivery plant
17. Aufwicklung17. Winding up
17.1 Changierung17.1 Change
17.2 Treibwalze17.2 Driving roller
17.3 Spule17.3 coil
18. Fadenführerträger18. Thread guide carrier
19. Einlegeschlitz19. Insert slot
20. Fadenführer20. Thread guide
20.1 Ruheposition 20.2 Meldeposition20.1 Rest position 20.2 Reporting position
21. Drehachse21st axis of rotation
22. Klinke22. Jack
23. Klinkenfeder23. Pawl spring
24. Masse24. Mass
25. Zugfeder25. Tension spring
26. Kliiikenkurve26. Kliiikenkurve
27. Raste27. Rest
28. Schalter28. Switch
29. Schub-Drehgelenk29. Thrust swivel
30. Nocken30. Cam
31. Kurve31st curve
31.1 erster Teil der Kurve31.1 first part of the curve
31.2 zweiter Teil der Kurve 31.2 second part of the curve

Claims

Patentansprüche claims
1. Fadenabzugsvorrichtung (1) zum kontinuierlichen Abziehen eines Fadens (2), mit zumindest zwei Vorlagestellen (3.1, 3.2), wobei eine der1. Thread take-off device (1) for continuously pulling a thread (2), with at least two feed points (3.1, 3.2), one of the
Vorlagestellen (3.1) eine Vorlagespule (4.1) und die andere VorlagestellePresentation points (3.1) a supply reel (4.1) and the other presentation point
(3.2) eine Reservespule (4.2) trägt, wobei der Faden (2) von der(3.2) carries a reserve spool (4.2), the thread (2) from the
Vorlagespule (4.1) und von der Reservespule (4.2) abziehbar ist und wobei das Fadenende (5.1) der Vorlagespule (4.1) mit dem Fadenanfang (5.2) der Reservespule (4.2) durch eine Bindung (5.3) zusammengeknotet ist, wobei ein Sensor (6) zwischen den beiden Vorlagestellen (3.1, 3.2) vorgesehen ist, der den Fadenübergang von dem Garn der Vorlagespule (4.1) zu dem Garn der Reservespule (4.2) erfasst und signalisiert und wobei der Sensor einen durch den Fadenübergang von einer Ruheposition (20.1) in eine Meldepostion (20.2) bewegbaren Fadenführer (20) und einen die Position des Fadenführers (20) detektierenden Lagegeber (28) aufweist, dadurch gekennzeichnet, dass der Sensor (6) ein Mittel aufweist, das eine Reflektion des Fadenführers (20) von der Meldeposition (20.2) in Richtung derSupply spool (4.1) and can be removed from the reserve spool (4.2) and the thread end (5.1) of the supply spool (4.1) is knotted together with the thread start (5.2) of the reserve spool (4.2) by a binding (5.3), a sensor (6 ) is provided between the two feed points (3.1, 3.2), which detects and signals the thread transition from the thread of the feed spool (4.1) to the thread of the reserve spool (4.2) and the sensor detects one through the thread transition from a rest position (20.1) in has a signaling position (20.2) movable thread guide (20) and a position sensor (28) detecting the position of the thread guide (20), characterized in that the sensor (6) has a means for reflecting the thread guide (20) from the signaling position (20.2) in the direction of
Ruheposition (20.1) beim Fadenüberlauf verhindert.Rest position (20.1) prevented when the thread overflows.
2. Fadenäbzugsvorrichtung nach Ansprach 1, dadurch gekennzeichnet, dass das Mittel zur Verhinderung der Reflektion an dem Fadenführer (20) oder einem mit dem Fadenführer (20) verbundenen Element einen zusätzlich zu dem ersten Bewegungsfreiheitsgrad des Fadenfuhrers (20) zwischen der Ruheposition (20.1) und der Meldeposition (20.2) vorhandenen2. Thread take-up device according to spoke 1, characterized in that the means for preventing reflection on the thread guide (20) or an element connected to the thread guide (20) an additional to the first degree of freedom of movement of the thread guide (20) between the rest position (20.1) and the reporting position (20.2)
Bewegungsfreiheitsgrad einen zweiten Bewegungsfreiheitsgrad bereitstellt, und dass der erste Bewegungsfreiheitsgrad und der zweite Bewegungsfreiheitsgrad so miteinander koordiniert sind, dass die Reflektion des Fadenführers (20) von der Meldeposition (20.2) in Richtung der Ruheposition (20.1) verhindert wird. Degree of freedom of movement provides a second degree of freedom of movement, and that the first degree of freedom of movement and the second degree of freedom of movement are coordinated with one another in such a way that the reflection of the thread guide (20) from the reporting position (20.2) in the direction of the rest position (20.1) is prevented.
3. Fadenabzugsvorrichtung nach Ansprach 2, dadurch gekennzeichnet, dass der zweite Bewegungsfreiheitsgrad durch eine Klinke (22) erbracht wird, die bei einer Bewegung des Fadenführers (20) eine Raste (27) in Richtung Meldeposition (20.2) überfahren kann und in Richtung Ruheposition (20.1) sperrt.3. Thread take-off device according to spoke 2, characterized in that the second degree of freedom of movement is provided by a pawl (22) which can move over a catch (27) in the direction of the signaling position (20.2) when the thread guide (20) is moving and in the direction of the rest position ( 20.1) blocks.
4. Fadenabzugsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Klinke (22) an dem Fadenfuhrer (20) angebracht ist.4. Thread take-off device according to claim 3, characterized in that the pawl (22) is attached to the thread guide (20).
5. Fadenabzugsvorrichtung nach Ansprach 3, dadurch gekennzeichnet, dass die Klinke (22) an dem feststehenden Teil des Sensors (6) angebracht ist.5. Thread take-off device according spoke 3, characterized in that the pawl (22) is attached to the fixed part of the sensor (6).
6. Fadenabzugsvorrichtung nach Ansprach 2, dadurch gekennzeichnet, dass der Fadenführer (20) in dem ersten und zweiten Bewegungsfreiheitsgrad bewegbar ist und dass eine Kurve (31) die Freiheitsgrade so miteinander koordiniert, dass bei der Bewegung des Fadenführers (20) in die Meldeposition (20.2) ein erster Teil (31.1) der Kurve durchfahren wird und dass ein Zurückprallen des Fadenführers (20) dazu führt, dass ein zweiter Teil (31.2) der Kurve durchfahren wird, wobei der zweite Teil (31.2) der Kurve so gestaltet ist, dass die Massenkräfte des Fadenführers diesen daran hindern, die Ruheposition (20.1) zu erreichen.6. Thread take-off device according to spoke 2, characterized in that the thread guide (20) is movable in the first and second degrees of freedom of movement and that a curve (31) coordinates the degrees of freedom with one another such that when the thread guide (20) moves into the reporting position ( 20.2) a first part (31.1) of the curve is traversed and that a rebounding of the thread guide (20) leads to a second part (31.2) of the curve being traversed, the second part (31.2) of the curve being designed such that the mass forces of the thread guide prevent it from reaching the rest position (20.1).
7. Fadenäbzugsvorrichtung nach Ansprach 6, dadurch gekennzeichnet, dass der zweite Teil (31.2) der Kurve so geformt ist, dass sie mehrfach durchlaufen werden kann.7. Thread take-up device according to spoke 6, characterized in that the second part (31.2) of the curve is shaped so that it can be run through several times.
8. Fadenabzugsvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der zweite Teil (31.2) der Kurve näherungsweise einer Kreisbahn entspricht.8. Thread take-off device according to claim 6, characterized in that the second part (31.2) of the curve corresponds approximately to a circular path.
9. Texturieπnaschine zum Texturieren und Aufwickeln eines Fadens, mit zumindest einem Lieferwerk (10), das den Faden von einer Fadenäbzugsvorrichtung (1) abzieht, dadurch gekennzeichnet, dass die Fadenabzugsvorrichtung (1) eine Fadenabzugsvorrichtung nach zumindest einem der vorhergehenden Ansprüche ist. 9. Texturing machine for texturing and winding up a thread, with at least one delivery unit (10) which removes the thread from a Thread take-off device (1) takes off, characterized in that the thread take-off device (1) is a thread take-off device according to at least one of the preceding claims.
EP04706160A 2003-02-05 2004-01-29 Thread take-off device Expired - Lifetime EP1590287B1 (en)

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US7197796B2 (en) 2007-04-03
DE502004005323D1 (en) 2007-12-06

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