EP2251291B1 - Thread buffer for a working station of an open-end spinning machine - Google Patents

Thread buffer for a working station of an open-end spinning machine Download PDF

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Publication number
EP2251291B1
EP2251291B1 EP10004272.0A EP10004272A EP2251291B1 EP 2251291 B1 EP2251291 B1 EP 2251291B1 EP 10004272 A EP10004272 A EP 10004272A EP 2251291 B1 EP2251291 B1 EP 2251291B1
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EP
European Patent Office
Prior art keywords
thread
leaf spring
spring element
yarn
open
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EP10004272.0A
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German (de)
French (fr)
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EP2251291A2 (en
EP2251291A3 (en
Inventor
Wilhelm Oehrl
Maximilian Preutenborbeck
Olaf Reissig
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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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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/36—Floating elements compensating for irregularities in supply or take-up of material
    • 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 yarn store for a workstation of an open-end spinning machine according to the preamble of claim 1.
  • each thread storage are arranged in the workstations of these textile machines, which compensate the thread speed and thread tension fluctuations occurring during the Fadenchangleiter.
  • pneumatic and mechanical thread stores are known, with mechanical thread stores in particular differing considerably in terms of their design.
  • Mechanical yarn stores can have, for example, a relatively complex control device and can be acted upon in a defined manner or have only one spring element which is deflected when the yarn speed changes.
  • Controllable mechanical thread stores are usually used when winding conical cheeses. Such, for example in the DE 24 54 917 C2 described yarn stores have the task of matching the occurring during winding conical cheeses in the field of winding device, sometimes considerable changes in the yarn winding speeds to the constant yarn delivery speed of the yarn take-off device. These yarn stores have, for example, arranged on a pivot lever thread deflection roller, which is positioned in the region of the yarn path and, if necessary, the length of the regular yarn path extended temporarily.
  • the pivot lever is usually movably mounted about an axis of rotation and controlled for example via a machine-length drive rod.
  • a pivotally mounted creel is provided with a measuring member which detects the pivot position of the creel and controls the position of the pivot lever of the thread store via a mechanical coupling member.
  • Such yarn stores have a leaf spring element which is equipped at the end with a thread deflection roller positioned in the region of the thread running path.
  • the Indian DE 28 03 378 C2 yarn store described has, for example, a leaf spring element, wherein the leaf spring is fixed via a holder in the form of two steel brackets on the machine frame of a textile machine and connected via a roller carrier with a Fadenumlenkrolle. In the middle part between the holder and the roller carrier, the leaf spring is also embedded in rubber-elastic elements, which should prevent the occurrence of uncontrollable vibrations.
  • the leaf spring element has a plurality of superimposed, different length leaf springs, which are fixed in a corresponding, common support.
  • the upper, longest of the leaf springs is end equipped with a thread deflection roller and is supported by three shorter, that is, stepped stepped leaf springs.
  • a thread brake device which has a special device for deflecting a thread.
  • This device is equipped with special, spaced successively buckling springs, the front of the buckling springs has a thread guide element, for example in the form of a ring.
  • Such stressed during operation by the thread on bending buckling springs have the property that they produce up to a predetermined by the design buckling pressure point a much higher restoring force than after exceeding the buckling pressure point. That is, such equipped with buckling springs devices that work as a thread brake or thread tension sensor are not suitable as a thread store, which should ensure a largely uniform thread tension.
  • the present invention seeks to develop a mechanical yarn storage for a job of an open-end spinning machine, both during winding of cheeses having a relatively low yarn tension, for example when winding dye packages, as well as in Winding of so-called coarse yarn bobbins, in which the yarn tension during the winding process is significantly higher, can be successfully used.
  • the yarn store according to the invention with a first leaf spring element carrying the thread deflection roller and a second leaf spring element arranged at a distance from this first leaf spring element has the advantage that such a thread store can be used when winding different types of cheeses without the thread store being previously rebuilt or especially new must be adjusted. That is, when winding low tension cross windings, only the first leaf spring element is used, which ensures that the filament tension of such cross windings is 2 to 3 cN throughout the spool travel. When cheeses are wound with a higher yarn tension, the first leaf spring element automatically applies when exceeding a certain thread tension to the second leaf spring element, with the result that in such a case, then both leaf spring elements act together.
  • the inventive design of the yarn store is ensured in a simple manner that both cheeses, which have a relatively low yarn tension, for example, dye packages, as well as cheeses can be wound, the thread tension is higher.
  • the first leaf spring element automatically sets when exceeding a certain thread tension to the second leaf spring element, with the result that then both leaf spring elements are effective together.
  • the spring force of the second leaf spring element is so high that even cheeses with a high Thread tension, for example, can be wound over 100 cN.
  • leaf spring elements with different spring force preferably have different thicknesses.
  • the first leaf spring element for example, a thickness of 0.2 to 0.3 mm, while the thickness of the second leaf spring element is at least 0.4 mm.
  • the leaf spring elements of the yarn store according to the invention are arranged on a pivotally mounted adjusting lever, which is positionable by means of a thrust piston in an operating position. That is, the thread store can, for example, for Wiederanspinnen after a yarn breakage, first pivoted to a repair position outside the yarn path and then easily be positioned back in its operating position.
  • Fig. 1 is a workstation 10 of a cheese-producing textile machine, in the present case an open-end rotor spinning machine shown.
  • Such open-end rotor spinning machines have a multiplicity of such workstations 10, which are arranged next to one another in a row and in each case identically formed.
  • a thread 17 is spun by means of an open-end spinning device 12 from a (not shown) original fiber tape, which is stored in sliver cans, which is then wound on a winding device 18 to form a cheese 19.
  • the winding devices 18 of these jobs 10 have inter alia a coil frame 8 for rotatably supporting a cross-wound bobbin 19, a Fadenchangier noticed 22 with a motor driven Einzelierisch traversing yarn guide 1 and a bobbin drive device 23, the bobbin drive roller 14, for example, by an electric motor 27 is driven.
  • Each of the open-end rotor spinning machine workstations 10 also includes a number of other, different thread handling devices necessary to facilitate proper operation of such workstations.
  • the work stations 10 are each equipped, for example, with a thread monitor 3, a thread withdrawal device 20, a mechanical thread store 2 and a waxing device 5.
  • the work stations 10 each have a suction nozzle 21, which is designed so that, for example, after a thread break on the cheese 19 accumulated thread 17 pneumatically recorded and the open-end spinning device 12 can be submitted to re-spinning.
  • the inventive mechanical yarn store 2 has two stationary, for example, on the housing of the waxing device 5 supported thread guide rollers 38, 39 and a movably mounted, acted upon during the spinning operation by the thread 17 Fadenumlenkrolle 36.
  • the thread deflection roller 36 is arranged on a first leaf spring element 32, which in turn is fixed to a lever 35.
  • the first leaf spring element 32 preferably has a thickness d 1 of only 0.2 to 0.3 mm and thus a relatively low spring force. That is, the first leaf spring member 32 is a relatively soft spring.
  • a second leaf spring element 34 is arranged on the adjusting lever 35 spaced from the first leaf spring element 32, whose thickness d 2 is at least 0.4 mm above the thickness of the first leaf spring element 32.
  • the spring force of the second leaf spring element 34 is thus significantly above the spring force of the first leaf spring element 32. That is, the second leaf spring element 34 is a relatively hard spring.
  • a drive preferably a thrust piston 37 is articulated, which a defined displacement of the control lever 35 and thus optionally a positioning of the Fadenumlenkrolle 36 in a (not shown) Anspinngna or in Fig.1 illustrated operating position I allows.
  • the yarn 17 produced in the open-end spinning device 12 is withdrawn from the open-end spinning device 12 by the yarn withdrawal device 20 at a constant yarn delivery speed and wound on the winding device 18 to form a cylindrical cross-wound bobbin 19.
  • the cross-wound bobbin 19 is rotatably mounted between the arms of a creel 8 and lies with its surface on the motor driven single-motor, rotating at a constant speed bobbin drive roller 14, which carries the cross-wound bobbin 19 via frictional engagement.
  • the accumulating on the cheese 19 thread 17 is simultaneously traversed by the traversing yarn 1 of the Fadenchangier Anlagen 22 so that it runs in criss-crossing layers on the surface of the cheese 19. If no suitable measures were taken, it would be due to the Fadenchang réelle continuously to thread tension changes in the running thread 17 during the winding process.
  • first leaf spring element 32 which is end equipped with a Fadenumlenkrolle 36, positioned in its operating position I in the thread running path that the current thread 17 deflects something by the Fadenumlenkrolle 36 and the thread 17 with one of the spring force of the first leaf spring member 32 and the spring forces of the leaf spring elements 32 and 34 dependent yarn tension is applied.
  • first leaf spring element 32 which is end equipped with a Fadenumlenkrolle 36, positioned in its operating position I in the thread running path that the current thread 17 deflects something by the Fadenumlenkrolle 36 and the thread 17 with one of the spring force of the first leaf spring member 32 and the spring forces of the leaf spring elements 32 and 34 dependent yarn tension is applied.
  • cheeses 19 which are wound with a relatively low yarn tension, for example dye packages, only the first leaf spring element 32 is during the winding operation deflected, with the result that such cheeses 19 are wound with a thread tension which is between 2 and 3 cN.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Description

Die Erfindung betrifft einen Fadenspeicher für eine Arbeitstelle einer Offenend-Spinnmaschine gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a yarn store for a workstation of an open-end spinning machine according to the preamble of claim 1.

Bei Offenend-Spinnmaschinen, bei denen ein von einer Spinnvorrichtung mit konstanter Liefergeschwindigkeit bereitgestellter Faden auf einer Spulvorrichtung als Kreuzspule aufgewickelt wird, sind im Bereich der Arbeitsstellen dieser Textilmaschinen jeweils Fadenspeicher angeordnet, die die bei der Fadenchangierung auftretenden Fadengeschwindigkeits-/ und Fadenspannungsschwankungen ausgleichen.
Im Zusammenhang mit solchen Offenend-Spinnmaschinen sind dabei sowohl pneumatische als auch mechanische Fadenspeicher bekannt, wobei sich insbesondere mechanische Fadenspeicher hinsichtlich ihrer Ausbildung zum Teil erheblich unterscheiden.
Mechanische Fadenspeicher können beispielsweise über eine relativ aufwendige Steuereinrichtung verfügen und definiert beaufschlagbar sein oder lediglich ein Federelement aufweisen, das bei Änderungen der Fadengeschwindigkeit ausgelenkt wird.In open-end spinning machines, in which a provided by a spinning machine with a constant delivery speed yarn is wound on a winding device as a cheese, each thread storage are arranged in the workstations of these textile machines, which compensate the thread speed and thread tension fluctuations occurring during the Fadenchangierung.
In connection with such open-end spinning machines, both pneumatic and mechanical thread stores are known, with mechanical thread stores in particular differing considerably in terms of their design.
Mechanical yarn stores can have, for example, a relatively complex control device and can be acted upon in a defined manner or have only one spring element which is deflected when the yarn speed changes.

Ansteuerbare mechanische Fadenspeicher kommen in der Regel beim Wickeln konischer Kreuzspulen zum Einsatz.
Derartige, beispielsweise in der DE 24 54 917 C2 beschriebene, Fadenspeicher haben vor allem die Aufgabe, die beim Wickeln konischer Kreuzspulen im Bereich der Spuleinrichtung auftretenden, zum Teil erheblichen Änderungen der Fadenwickelgeschwindigkeiten an die konstante Fadenliefergeschwindigkeit der Fadenabzugseinrichtung anzugleichen.
Diese Fadenspeicher besitzen beispielsweise eine an einem Schwenkhebel angeordnete Fadenumlenkrolle, die im Bereich des Fadenlaufweges positioniert ist und bei Bedarf die Länge des regulären Fadenlaufweges vorübergehend verlängert.Controllable mechanical thread stores are usually used when winding conical cheeses.
Such, for example in the DE 24 54 917 C2 described yarn stores have the task of matching the occurring during winding conical cheeses in the field of winding device, sometimes considerable changes in the yarn winding speeds to the constant yarn delivery speed of the yarn take-off device.
These yarn stores have, for example, arranged on a pivot lever thread deflection roller, which is positioned in the region of the yarn path and, if necessary, the length of the regular yarn path extended temporarily.

Der Schwenkhebel ist üblicherweise um eine Drehachse beweglich gelagert und beispielsweise über eine maschinenlange Antriebsstange ansteuerbar.
Bei diesen bekannten Fadenspeichern findet außerdem eine proportionale Anpassung der temporär abzuspeichernden Fadenmenge an die jeweilige Spulenumfangsdifferenz der Kreuzspule statt, die vom Durchmesser der Spule abhängt.
Das heißt, zur Bestimmung des momentanen Spulendurchmessers der Kreuzspule ist ein schwenkbar gelagerter Spulenrahmen mit einem Messglied versehen, das die Schwenkstellung des Spulenrahmens erfasst und über ein mechanisches Kupplungsglied die Position des Schwenkhebels des Fadenspeichers steuert.The pivot lever is usually movably mounted about an axis of rotation and controlled for example via a machine-length drive rod.
In these known thread stores also takes place a proportional adjustment of the temporarily stored amount of thread to the respective coil circumference difference of the cheese, which depends on the diameter of the coil.
That is, for determining the current coil diameter of the cheese, a pivotally mounted creel is provided with a measuring member which detects the pivot position of the creel and controls the position of the pivot lever of the thread store via a mechanical coupling member.

Mechanische Fadenspeicher, die beim Spulen zylindrischer Kreuzspulen zum Einsatz kommen und die durch die Fadenchangierung hervorgerufenen Änderungen der Fadenwickelgeschwindigkeit mittels eines Blattfederelementes ausgleichen, sind beispielsweise in der DE 28 03 378 C2 oder in der DE 35 19 945 C2 beschrieben.Mechanical thread stores, which are used in the winding of cylindrical cheeses and compensate for the changes caused by the Fadenchangierung thread winding speed by means of a leaf spring element, are for example in the DE 28 03 378 C2 or in the DE 35 19 945 C2 described.

Solche Fadenspeicher weisen ein Blattfederelement auf, das endseitig mit einer im Bereich des Fadenlaufweges positionierten Fadenumlenkrolle ausgestattet ist.Such yarn stores have a leaf spring element which is equipped at the end with a thread deflection roller positioned in the region of the thread running path.

Der in der DE 28 03 378 C2 beschriebene Fadenspeicher weist zum Beispiel ein Blattfederelement auf, bei dem die Blattfeder über eine Halterung in Form zweier Stahlklammern am Maschinengestell einer Textilmaschine festgelegt und über einen Rollenträger mit einer Fadenumlenkrolle verbunden ist.
Im Mittelteil zwischen der Halterung und dem Rollenträger ist die Blattfeder außerdem in gummielastische Elemente eingebettet, die das Auftreten von unkontrollierbaren Schwingungen verhindern sollen.
Bei der DE 35 19 945 C2 weist das Blattfederelement mehrere aufeinanderliegende, unterschiedlich lange Blattfedern auf, die in einer entsprechenden, gemeinsamen Halterung festgelegt sind.The Indian DE 28 03 378 C2 yarn store described has, for example, a leaf spring element, wherein the leaf spring is fixed via a holder in the form of two steel brackets on the machine frame of a textile machine and connected via a roller carrier with a Fadenumlenkrolle.
In the middle part between the holder and the roller carrier, the leaf spring is also embedded in rubber-elastic elements, which should prevent the occurrence of uncontrollable vibrations.
In the DE 35 19 945 C2 the leaf spring element has a plurality of superimposed, different length leaf springs, which are fixed in a corresponding, common support.

Die oberste, längste der Blattfedern ist endseitig mit einer Fadenumlenkrolle ausgestattet und wird durch drei kürzere, das heißt, stufenförmig abgesetzte Blattfedern unterstützt.The upper, longest of the leaf springs is end equipped with a thread deflection roller and is supported by three shorter, that is, stepped stepped leaf springs.

Des Weiteren ist durch die EP 0 790 208 B1 eine Fadenbremseinrichtung bekannt, die eine besondere Vorrichtung zum Umlenken eines Fadens aufweist.
Diese Vorrichtung ist mit speziellen, im Abstand hintereinander angeordneten Knickfedern ausgestattet, wobei die vordere der Knickfedern über ein Fadenführungselement zum Beispiel in Form eines Ringes verfügt.
Derartige während des Betriebes durch den Faden auf Biegung beanspruchte Knickfedern weisen die Eigenschaft auf, dass sie bis zu einem durch die Konstruktion vorgegebenen Knick-Druckpunkt eine deutlich höhere Rückstellkraft erzeugen, als nach Überschreiten des Knick-Druckpunktes.
Das heißt, solche mit Knickfedern ausgestattete Vorrichtungen, die als Fadenbremse oder als Fadenspannungsfühler arbeiten, sind als Fadenspeicher, die eine weitestgehend gleichmäßige Fadenspannung gewährleisten sollen, wenig geeignet.Furthermore, by the EP 0 790 208 B1 a thread brake device is known, which has a special device for deflecting a thread.
This device is equipped with special, spaced successively buckling springs, the front of the buckling springs has a thread guide element, for example in the form of a ring.
Such stressed during operation by the thread on bending buckling springs have the property that they produce up to a predetermined by the design buckling pressure point a much higher restoring force than after exceeding the buckling pressure point.
That is, such equipped with buckling springs devices that work as a thread brake or thread tension sensor are not suitable as a thread store, which should ensure a largely uniform thread tension.

Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen mechanischen Fadenspeicher für eine Arbeitsstelle einer Offenend-Spinnmaschine zu entwickeln, der sowohl beim Wickeln von Kreuzspulen, die eine relativ geringe Fadenspannung aufweisen, zum Beispiel beim Wickeln von Färbespulen, als auch beim Wickeln von sogenannten Grobgarnspulen, bei denen die Fadenspannung während des Spulprozesses deutlich höher liegt, erfolgreich eingesetzt werden kann.Based on the aforementioned prior art, the present invention seeks to develop a mechanical yarn storage for a job of an open-end spinning machine, both during winding of cheeses having a relatively low yarn tension, for example when winding dye packages, as well as in Winding of so-called coarse yarn bobbins, in which the yarn tension during the winding process is significantly higher, can be successfully used.

Diese Aufgabe wird erfindungsgemäß durch einen Fadenspeicher gelöst, der die im Anspruch 1 beschriebenen Merkmale aufweist. Vorteilhafte Ausführungsformen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by a yarn storage device having the features described in claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Der erfindungsgemäße Fadenspeicher mit einem ersten, die Fadenumlenkrolle tragenden Blattfederelement und einem beabstandet zu diesem ersten Blattfederelement angeordneten zweiten Blattfederelement, hat den Vorteil, dass ein solcher Fadenspeicher beim Wickeln verschiedener Arten von Kreuzspulen eingesetzt werden kann, ohne dass der Fadenspeicher vorher umgebaut oder jeweils speziell neu eingestellt werden muss.
Das heißt, beim Wickeln von Kreuzspulen mit geringer Fadenspannung ist ausschließlich das erste Blattfederelement im Einsatz, das dafür sorgt, dass die Fadenspannung solcher Kreuzspulen während der gesamten Spulenreise bei 2 bis 3 cN liegt.
Wenn Kreuzspulen mit einer höheren Fadenspannung gewickelt werden, legt sich das erste Blattfederelement bei Überschreitung einer gewissen Fadenspannung automatisch an das zweite Blattfederelement an, mit der Folge, dass in einem solchen Fall dann beide Blattfederelemente gemeinsam wirksam werden.
Durch die erfindungsgemäße Ausbildung des Fadenspeichers wird auf einfache Weise sichergestellt, dass sowohl Kreuzspulen, die eine relativ geringe Fadenspannung aufweisen, zum Beispiel Färbespulen, als auch Kreuzspulen gewickelt werden können, deren Fadenspannung höher liegt.The yarn store according to the invention with a first leaf spring element carrying the thread deflection roller and a second leaf spring element arranged at a distance from this first leaf spring element has the advantage that such a thread store can be used when winding different types of cheeses without the thread store being previously rebuilt or especially new must be adjusted.
That is, when winding low tension cross windings, only the first leaf spring element is used, which ensures that the filament tension of such cross windings is 2 to 3 cN throughout the spool travel.
When cheeses are wound with a higher yarn tension, the first leaf spring element automatically applies when exceeding a certain thread tension to the second leaf spring element, with the result that in such a case, then both leaf spring elements act together.
The inventive design of the yarn store is ensured in a simple manner that both cheeses, which have a relatively low yarn tension, for example, dye packages, as well as cheeses can be wound, the thread tension is higher.

Wie im Anspruch 2 dargelegt, weist in vorteilhafter Ausführungsform das die Fadenumlenkrolle tragende erste Blattfederelement eine relativ geringe Federkraft auf, während das beabstandet zu diesem ersten Blattfederelement angeordnete zweite Blattfederelement eine deutlich höhere Federkraft hat. Auch bei einer solchen Ausbildung des Fadenspeichers legt sich das erste Blattfederelement bei Überschreitung einer gewissen Fadenspannung automatisch an das zweite Blattfederelement an, mit der Folge, dass dann beide Blattfederelemente gemeinsam wirksam werden.
Vorzugsweise ist die Federkraft des zweiten Blattfederelements dabei so hoch, dass problemlos auch Kreuzspulen mit einer hohen Fadenspannung, beispielsweise von über 100 cN gewickelt werden können.As set forth in claim 2, in an advantageous embodiment, the thread guide roller bearing first leaf spring element on a relatively small spring force, while the spaced arranged to this first leaf spring element second leaf spring element has a much higher spring force. Even with such a design of the thread store, the first leaf spring element automatically sets when exceeding a certain thread tension to the second leaf spring element, with the result that then both leaf spring elements are effective together.
Preferably, the spring force of the second leaf spring element is so high that even cheeses with a high Thread tension, for example, can be wound over 100 cN.

Wie im Anspruch 3 dargelegt ist, weisen Blattfederelemente mit unterschiedlicher Federkraft vorzugsweise unterschiedliche Dicken auf.
In vorteilhafter Ausführungsform weist das erste Blattfederelement beispielsweise eine Dicke von 0,2 bis 0,3 mm auf, während die Dicke des zweiten Blattfederelements wenigstens 0,4 mm beträgt.
Wie vorstehend bereits beschrieben, können mit Fadenspeichern, die mit derartig ausgebildeten und angeordneten
Blattfederelementen ausgerüstet sind, problemlos recht unterschiedliche Kreuzspulen gewickelt werden, das heißt, Kreuzspulen, die sich bezüglich ihrer Fadenspannung erheblich unterscheiden.As set forth in claim 3, leaf spring elements with different spring force preferably have different thicknesses.
In an advantageous embodiment, the first leaf spring element, for example, a thickness of 0.2 to 0.3 mm, while the thickness of the second leaf spring element is at least 0.4 mm.
As already described above, can with thread stores, with such trained and arranged
Leaf spring elements are equipped, easily quite different cheeses are wound, that is, cheeses, which differ significantly with respect to their thread tension.

Gemäß Anspruch 4 sind die Blattfederelemente des erfindungsgemäßen Fadenspeichers an einem schwenkbar gelagerten Stellhebel angeordnet, der mittels eines Schubkolbengetriebes in einer Betriebsstellung positionierbar ist.
Das heißt, der Fadenspeicher kann, beispielsweise zum Wiederanspinnen nach einem Fadenbruch, zunächst in eine Reparaturstellung außerhalb des Fadenlaufweges geschwenkt und anschließend problemlos wieder in seiner Betriebsstellung positioniert werden.According to claim 4, the leaf spring elements of the yarn store according to the invention are arranged on a pivotally mounted adjusting lever, which is positionable by means of a thrust piston in an operating position.
That is, the thread store can, for example, for Wiederanspinnen after a yarn breakage, first pivoted to a repair position outside the yarn path and then easily be positioned back in its operating position.

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

Es zeigen:

Fig. 1
perspektivisch in Vorderansicht eine Arbeitsstelle einer Offenend-Rotorspinnmaschine, die mit einem erfindungsgemäßen Fadenspeicher ausgestattet ist,
Fig. 2
den Fadenspeicher gemäß Fig.1 in einem größeren Maßstab.
Show it:
Fig. 1
perspective view in front view of a workstation of an open-end rotor spinning machine, which is equipped with a thread storage according to the invention,
Fig. 2
the thread store according to Fig.1 on a larger scale.

In Fig. 1 ist eine Arbeitsstelle 10 einer Kreuzspulen herstellenden Textilmaschine, im vorliegenden Fall einer Offenend-Rotorspinnmaschine, dargestellt.
Derartige Offenend-Rotorspinnmaschinen weisen eine Vielzahl solcher in Reihe nebeneinander angeordneter, jeweils identisch ausgebildeter Arbeitsstellen 10 auf.
Auf den Arbeitsstellen 10 wird mittels einer Offenend-Spinnvorrichtung 12 aus einem (nicht dargestellten) Vorlagefaserband, das in Spinnkannen bevorratet ist, ein Faden 17 gesponnen, der anschließend auf einer Spulvorrichtung 18 zu einer Kreuzspule 19 aufgewickelt wird.
Die Spulvorrichtungen 18 dieser Arbeitsstellen 10 verfügen unter anderem über einen Spulenrahmen 8 zum drehbaren Haltern einer Kreuzspule 19, eine Fadenchangiereinrichtung 22 mit einem einzelmotorisch antreibbaren Changierfadenführer 1 sowie eine Spulenantriebseinrichtung 23, deren Spulenantriebswalze 14 zum Beispiel durch einen Elektromotor 27 angetrieben wird.In Fig. 1 is a workstation 10 of a cheese-producing textile machine, in the present case an open-end rotor spinning machine shown.
Such open-end rotor spinning machines have a multiplicity of such workstations 10, which are arranged next to one another in a row and in each case identically formed.
On the workstations 10, a thread 17 is spun by means of an open-end spinning device 12 from a (not shown) original fiber tape, which is stored in sliver cans, which is then wound on a winding device 18 to form a cheese 19.
The winding devices 18 of these jobs 10 have inter alia a coil frame 8 for rotatably supporting a cross-wound bobbin 19, a Fadenchangiereinrichtung 22 with a motor driven Einzelierisch traversing yarn guide 1 and a bobbin drive device 23, the bobbin drive roller 14, for example, by an electric motor 27 is driven.

Jede der Arbeitsstellen 10 der Offenend-Rotorspinnmaschine weist außerdem eine Anzahl weiterer, unterschiedlicher Fadenhandhabungs- bzw. Fadenbehandlungseinrichtungen auf, die notwendig sind, um einen ordnungsgemäßen Betrieb derartiger Arbeitsstellen zu ermöglichen.Each of the open-end rotor spinning machine workstations 10 also includes a number of other, different thread handling devices necessary to facilitate proper operation of such workstations.

Die Arbeitsstellen 10 sind beispielsweise jeweils mit einem Fadenwächter 3, einer Fadenabzugseinrichtung 20, einem mechanischen Fadenspeicher 2 sowie einer Paraffiniereinrichtung 5 ausgestattet.
Außerdem verfügen die Arbeitsstellen 10 jeweils über eine Saugdüse 21, die so ausgebildet ist, dass ein zum Beispiel nach einem Fadenbruch auf die Kreuzspule 19 aufgelaufener Faden 17 pneumatisch aufgenommen und der Offenend-Spinnvorrichtung 12 zum Wiederanspinnen vorgelegt werden kann.The work stations 10 are each equipped, for example, with a thread monitor 3, a thread withdrawal device 20, a mechanical thread store 2 and a waxing device 5.
In addition, the work stations 10 each have a suction nozzle 21, which is designed so that, for example, after a thread break on the cheese 19 accumulated thread 17 pneumatically recorded and the open-end spinning device 12 can be submitted to re-spinning.

Wie in Fig.1 dargestellt, sind der Einzelantrieb 24 für die Fadenabzugseinrichtung 20, der Einzelantrieb 25 für die Saugdüse 21, der Einzelantrieb 26 für den Changierfadenführer 1 sowie der Einzelantrieb 27 für die Spulenantriebswalze 14 über Steuerleitungen 28 - 31 an einen Arbeitsstellenrechner 6 angeschlossen, der seinerseits, vorzugsweise über ein Bussystem 7, mit einer (nicht dargestellten) Zentralsteuereinheit der Offenend-Spinnmaschine verbunden ist.As in Fig.1 shown, the individual drive 24 for the thread withdrawal device 20, the single drive 25 for the suction nozzle 21, the single drive 26 for the traversing yarn guide 1 and the single drive 27 for the bobbin drive roller 14 via control lines 28 - 31 connected to a workstation computer 6, in turn, preferably via a bus system 7 is connected to a (not shown) central control unit of the open-end spinning machine.

Der erfindungsgemäße mechanische Fadenspeicher 2 weist zwei stationäre, beispielsweise am Gehäuse der Paraffiniereinrichtung 5 abgestützte Fadenleitrollen 38, 39 sowie eine beweglich gelagerte, während des Spinnbetriebes durch den Faden 17 beaufschlagte Fadenumlenkrolle 36 auf.
Die Fadenumlenkrolle 36 ist dabei an einem ersten Blattfederelement 32 angeordnet, das seinerseits an einem Stellhebel 35 festgelegt ist.
Das erste Blattfederelement 32 weist vorzugsweise eine Dicke d1 von lediglich 0,2 bis 0,3 mm und damit eine relativ geringe Federkraft auf.
Das heißt, beim ersten Blattfederelement 32 handelt sich um eine relativ weiche Feder.The inventive mechanical yarn store 2 has two stationary, for example, on the housing of the waxing device 5 supported thread guide rollers 38, 39 and a movably mounted, acted upon during the spinning operation by the thread 17 Fadenumlenkrolle 36.
The thread deflection roller 36 is arranged on a first leaf spring element 32, which in turn is fixed to a lever 35.
The first leaf spring element 32 preferably has a thickness d 1 of only 0.2 to 0.3 mm and thus a relatively low spring force.
That is, the first leaf spring member 32 is a relatively soft spring.

Wie insbesondere aus der Fig.2 ersichtlich, ist am Stellhebel 35 beabstandet zum ersten Blattfederelement 32 ein zweites Blattfederelement 34 angeordnet, dessen Dicke d2 mit wenigstens 0,4 mm über der Dicke der ersten Blattfederelements 32 liegt.As in particular from the Fig.2 it can be seen, a second leaf spring element 34 is arranged on the adjusting lever 35 spaced from the first leaf spring element 32, whose thickness d 2 is at least 0.4 mm above the thickness of the first leaf spring element 32.

Die Federkraft des zweiten Blattfederelements 34 liegt somit deutlich über der Federkraft des ersten Blattfederelements 32. Das bedeutet, beim zweiten Blattfederelement 34 handelt es sich um einer relativ harte Feder.The spring force of the second leaf spring element 34 is thus significantly above the spring force of the first leaf spring element 32. That is, the second leaf spring element 34 is a relatively hard spring.

An den Stellhebel 35, der begrenzt drehbar gelagert ist, ist ein Antrieb, vorzugsweise ein Schubkolbengetriebe 37 angelenkt, der eine definierte Verlagerung des Stellhebels 35 und damit wahlweise eine Positionierung der Fadenumlenkrolle 36 in einer (nicht dargestellten) Anspinnstellung oder in der in Fig.1 dargestellten Betriebsstellung I ermöglicht.To the adjusting lever 35, which is limited rotatably mounted, a drive, preferably a thrust piston 37 is articulated, which a defined displacement of the control lever 35 and thus optionally a positioning of the Fadenumlenkrolle 36 in a (not shown) Anspinnstellung or in Fig.1 illustrated operating position I allows.

Funktion der erfindungsgemäßen Einrichtung:Function of the device according to the invention:

Während des Spinnbetriebes wird der in der Offenend-Spinnvorrichtung 12 hergestellte Faden 17 durch die Fadenabzugseinrichtung 20 mit konstanter Fadenliefergeschwindigkeit aus der Offenend-Spinnvorrichtung 12 abgezogen und auf der Spulvorrichtung 18 zu einer zylindrischen Kreuzspule 19 aufgewickelt.
Die Kreuzspule 19 ist dabei zwischen den Armen eines Spulenrahmens 8 rotierbar gelagert und liegt mit ihrer Oberfläche auf der einzelmotorisch antreibbaren, mit konstanter Drehzahl rotierenden Spulenantriebswalze 14 auf, die die Kreuzspule 19 über Reibschluss mitnimmt.
Der auf die Kreuzspule 19 auflaufende Faden 17 wird gleichzeitig durch den Changierfadenführer 1 der Fadenchangiereinrichtung 22 so traversiert, dass er in sich kreuzenden Lagen auf die Oberfläche der Kreuzspule 19 aufläuft.
Wenn keine geeigneten Maßnahmen ergriffen würden, käme es während des Spulvorganges aufgrund der Fadenchangierung fortlaufend zu Fadenspannungsänderungen im laufenden Faden 17.During the spinning operation, the yarn 17 produced in the open-end spinning device 12 is withdrawn from the open-end spinning device 12 by the yarn withdrawal device 20 at a constant yarn delivery speed and wound on the winding device 18 to form a cylindrical cross-wound bobbin 19.
The cross-wound bobbin 19 is rotatably mounted between the arms of a creel 8 and lies with its surface on the motor driven single-motor, rotating at a constant speed bobbin drive roller 14, which carries the cross-wound bobbin 19 via frictional engagement.
The accumulating on the cheese 19 thread 17 is simultaneously traversed by the traversing yarn 1 of the Fadenchangiereinrichtung 22 so that it runs in criss-crossing layers on the surface of the cheese 19.
If no suitable measures were taken, it would be due to the Fadenchangierung continuously to thread tension changes in the running thread 17 during the winding process.

Das heißt, bei der Changierung des Fadens 17 in Richtung der Spulenflanken der Kreuzspule 19 käme es aufgrund des Anstieges der Fadengeschwindigkeit stets zu einem deutlichen Fadenspannungsanstieg, während die Fadenspannung abnähme, wenn der Faden 17 in Richtung der Spulenmitte der Kreuzspule 19 traversiert und dabei die Fadengeschwindigkeit verringert wird.That is, in the traverse of the thread 17 in the direction of the coil flanks of the cheese 19 it would always come to a significant increase in yarn tension due to the increase in yarn speed, while the thread tension decreases when the thread 17 traverses in the direction of the coil center of the cheese 19 and thereby the yarn speed is reduced.

Um solche Fadenspannungsschwankungen möglichst zu vermeiden, wird der von der Fadenabzugseinrichtung 20 mit konstanter Liefergeschwindigkeit vorgelegte Faden 17, bevor er zur Fadenchangiereinrichtung 22 gelangt, über den erfindungsgemäßen mechanischen Fadenspeicher 2 geleitet, der den bei der Fadenchangierung auftretenden unterschiedlichen Fadenlängenbedarf ausgleicht und dadurch die Fadenspannung nahezu konstant hält.
Das heißt, durch Auslenkung wenigstens einer der Blattfederelemente 32 bzw. 34 des mechanischen Fadenspeichers 2 erfolgt automatisch ein Fadenlängenausgleich.In order to avoid such thread tension fluctuations as possible, the thread 17 presented by the yarn withdrawal device 20 at a constant delivery speed, before it reaches the thread-changing device 22, passed over the inventive mechanical yarn store 2, which compensates for the occurring during the Fadenchangierung different yarn length requirement and thereby the yarn tension almost constant holds.
That is, by deflection of at least one of the leaf spring elements 32 and 34 of the mechanical thread store 2 is automatically a thread length compensation.

Wie in Fig.1 dargestellt, ist das an einem schwenkbar gelagerten Stellhebel 35 befestigte erste Blattfederelement 32, das endseitig mit einer Fadenumlenkrolle 36 ausgestattet ist, in seiner Betriebsstellung I so im Fadenlaufweg positioniert, dass der laufende Faden 17 durch die Fadenumlenkrolle 36 etwas auslenkt und der Faden 17 dabei mit einer von der Federkraft des ersten Blattfederelements 32 bzw. den Federkräften der Blattfederelemente 32 und 34 abhängigen Fadenzugkraft beaufschlagt wird.
Bei Kreuzspulen 19, die mit relativ geringer Fadenzugkraft gewickelt werden, beispielsweise Färbespulen, wird während des Spulbetriebes lediglich das erste Blattfederelement 32 ausgelenkt, mit der Folge, dass solche Kreuzspulen 19 mit einer Fadenspannung gewickelt werden, die zwischen 2 und 3 cN liegt.As in Fig.1 shown, which is attached to a pivotally mounted lever 35 first leaf spring element 32, which is end equipped with a Fadenumlenkrolle 36, positioned in its operating position I in the thread running path that the current thread 17 deflects something by the Fadenumlenkrolle 36 and the thread 17 with one of the spring force of the first leaf spring member 32 and the spring forces of the leaf spring elements 32 and 34 dependent yarn tension is applied.
In cheeses 19, which are wound with a relatively low yarn tension, for example dye packages, only the first leaf spring element 32 is during the winding operation deflected, with the result that such cheeses 19 are wound with a thread tension which is between 2 and 3 cN.

Insbesondere bei Kreuzspulen 19 mit grobem Garn, die mit einer relativ hohen Fadenspannung von zum Beispiel > 100 cN gewickelt werden, legt sich das erste Blattfederelement 32 nach dem Start des Spulprozesses sofort an das zweite Blattfederelement 34 an, so dass automatisch die Federkraft beider Blattfederelemente 32, 34 zum Tragen kommt.
Auch in diesem Fall ist während der Spulenreise eine nahezu konstante, allerdings deutlich höhere Fadenspannung gewährleistet.In particular, in the case of cheeses 19 with coarse yarn, which are wound with a relatively high yarn tension of, for example,> 100 cN, the first leaf spring element 32 immediately after the start of the winding process to the second leaf spring element 34, so that automatically the spring force of both leaf spring elements 32nd , 34 comes into play.
Also in this case, a nearly constant, but significantly higher thread tension is ensured during the coil travel.

Claims (4)

  1. Thread storage device (2) for a workstation (10) of an open-end spinning machine, in particular for compensating for changes in the thread speed which occur during the winding of a cross-wound bobbin (19) as a result of the thread traversing, comprising a first leaf spring element (32) arranged on a pivotably mounted holder (35) and a thread diverting roller (36) arranged on said first leaf spring element (32),
    characterised in that
    the thread storage device (2) comprises a second leaf spring element (34) spaced apart from the first leaf spring element (32).
  2. Thread storage device according to claim 1, characterised in that the first leaf spring element (32) has a much lower spring force than the second leaf spring element (34).
  3. Thread storage device according to claim 2, characterised in that the thickness (d1) of the first leaf spring element (32) is 0.2 to 0.3 mm and the thickness (d2) of the second leaf spring element (34) is at least 0.4 mm.
  4. Thread storage device according to claim 1, characterised in that both leaf spring elements (32, 34) are arranged on a pivotably mounted holder (35) designed as a control lever (35), which can be positioned in an operating position (I) by means of a thrust piston gear (37).
EP10004272.0A 2009-05-13 2010-04-22 Thread buffer for a working station of an open-end spinning machine Active EP2251291B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009021066A DE102009021066A1 (en) 2009-05-13 2009-05-13 Thread storage for a workstation of an open-end spinning machine

Related Parent Applications (1)

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DE102009021066 Previously-Filed-Application 2009-05-13

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EP2251291A2 EP2251291A2 (en) 2010-11-17
EP2251291A3 EP2251291A3 (en) 2014-02-19
EP2251291B1 true EP2251291B1 (en) 2017-05-31

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Publication number Priority date Publication date Assignee Title
CN102134785B (en) * 2011-04-01 2013-01-02 厉力永 Automatic yarn waxing device of flat knitting machine
DE102016121746A1 (en) 2016-11-14 2018-05-17 Saurer Germany Gmbh & Co. Kg Thread deflection roller for a arranged in the region of the Fadenchangierdreieckes a job of a cross-wound textile machine mechanical thread storage
CN107663711B (en) * 2017-10-31 2019-02-15 宁波源生针织有限公司 Knitwear process wire-sending device
DE102018115601A1 (en) 2018-06-28 2020-01-02 Saurer Spinning Solutions Gmbh & Co. Kg Fadenumlenkeinheit
CN110040571B (en) * 2019-05-17 2021-04-06 常州市新创智能科技有限公司 Yarn constant tension control device, method and system
CN110040578B (en) * 2019-05-17 2020-02-21 常州市新创智能科技有限公司 Yarn winding system and control method
CN113684594B (en) * 2021-08-17 2022-08-30 广东邦诚纺织科技有限公司 Warp-finished warp-broken instant detection self-stopping device and circular weaving machine

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DE2454917C2 (en) 1974-11-20 1981-11-19 W. Schlafhorst & Co, 4050 Mönchengladbach Method and device for winding conical cheese at a constant thread feed speed
FR2303204A1 (en) * 1975-03-06 1976-10-01 Commissariat Energie Atomique TENSIONING DEVICE FOR RIBBONS OR CABLES FOR TELEMANIPULATOR
CH615647A5 (en) 1977-03-01 1980-02-15 Rieter Ag Maschf Thread-tension compensator
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JPS60113612A (en) * 1983-11-24 1985-06-20 三菱重工業株式会社 Leaf spring wire reel stopper unit
DE3519945C2 (en) 1985-06-04 1987-03-19 F.M.N. Schuster GmbH & Co KG, 5030 Hürth Device for feeding threads, yarns, etc. to a winding device with traversing
DE4235203A1 (en) * 1992-10-19 1994-04-21 Rieter Ingolstadt Spinnerei Spinning device
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Publication number Publication date
EP2251291A2 (en) 2010-11-17
CN101885434B (en) 2013-08-14
DE102009021066A1 (en) 2010-11-18
EP2251291A3 (en) 2014-02-19
CN101885434A (en) 2010-11-17

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