EP0675217A1 - Device for cleaning a rotor rotating in the rotor casing of a open-end spinning unit - Google Patents

Device for cleaning a rotor rotating in the rotor casing of a open-end spinning unit Download PDF

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Publication number
EP0675217A1
EP0675217A1 EP95103545A EP95103545A EP0675217A1 EP 0675217 A1 EP0675217 A1 EP 0675217A1 EP 95103545 A EP95103545 A EP 95103545A EP 95103545 A EP95103545 A EP 95103545A EP 0675217 A1 EP0675217 A1 EP 0675217A1
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EP
European Patent Office
Prior art keywords
scraper
rotor
belt
cleaning
collecting groove
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
EP95103545A
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German (de)
French (fr)
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EP0675217B1 (en
Inventor
Hans Raasch
Helmuth Hensen
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
W Schlafhorst AG and Co
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Publication date
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Publication of EP0675217A1 publication Critical patent/EP0675217A1/en
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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
    • D01H4/04—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 imparting twist by contact of fibres with a running surface
    • D01H4/22—Cleaning of running surfaces
    • D01H4/24—Cleaning of running surfaces in rotor spinning

Definitions

  • the invention relates to a device for cleaning a rotor rotating in the rotor housing of an open-end spinning unit, with a scraper that can be positioned in the fiber collecting groove of the rotor.
  • DE 26 18 094 A1 describes a cleaning device which is arranged in an automatic maintenance unit and has a scraper element which can be moved into the spinning rotor and is adapted to the contour of the fiber collecting groove.
  • the scraper element is attached to the end of a rod.
  • the scraper element has an injection device for liquid cleaning agents. With such a device, the fiber collecting groove can be mechanically cleaned and additionally a detergent-air mixture can be blown into the rotor.
  • DE 39 11 946 A1 discloses a cleaning device specially designed for small rotor diameters.
  • the actual cleaning device is arranged in a housing that is positioned in front of the open spin box.
  • a carrier is pivotally mounted within the housing, whose axis of rotation is offset from the rotor axis and is arranged at an acute angle.
  • the carrier has a spatial shape such that the end occupied with the cleaning tool, when rotated about the axis, describes an arc that intersects the plane of the fiber collecting groove of the rotor.
  • the cleaning tool is fed in a forward movement through the rotor opening to the part of the rotor to be cleaned.
  • a cleaning device is known from DE 37 15 934 A1, the scraper of which is arranged on the end of the piston rod of a pneumatic thrust piston transmission and can be moved into the rotor of an OE spinning unit in the direction of the fiber collecting groove.
  • the scraper has a knife-like end part which extends into the fiber collecting groove and is angled in the knife plane against the direction of rotation of the rotor in such a way that the front edge is inclined towards the direction of rotation of the rotor.
  • the invention has for its object to provide an improved cleaning device for open-end rotor spinning units.
  • the design of the scraper according to the invention has the advantage that the scraper automatically adopts an optimal length when the cleaning device is moved into the rotor, regardless of its wear, which ensures that the scraper contacts the bottom of the fiber collecting groove. This ensures that the scraper is consistently effective from the first to the last cleaning process, regardless of the degree of contamination of the spinning rotor.
  • the scraper is preferably designed as a band-like wearing part, so that the service life of such cleaning devices is significantly extended compared to known devices.
  • the optimal length of the scraper belt is automatically adjusted when entering the fiber collecting groove, control inspections by the operating personnel can be largely dispensed with or significantly restricted. Overall, the device according to the invention considerably relieves the strain on machine personnel.
  • the scraper belt is non-positively connected to its displacement device.
  • a pressure roller resting on the scraper belt under spring force is produced just as much friction as is necessary between the scraper belt and the driven feed roller of the displacement device in order to bring the scraper belt into contact sufficiently firmly in the fiber collecting groove of the spinning rotor, that is to say to ensure safe cleaning of this critical area.
  • the feed roller can slide freely under the scraper belt, so that excessive wear due to excessive pressure is avoided.
  • the displacement device for the scraper belt preferably consists of a feed roller having a pivoting lever, a spring-loaded pressure roller and a pneumatic cylinder connected to the pivoting lever with its piston rod.
  • the feed roller When the piston rod is extended or retracted, the feed roller is rotated clockwise or counterclockwise and thereby takes the scraper belt clamped between the feed roller and the pressure roller in the respective direction of rotation of the feed roller.
  • the arrangement is such that the feed path of the scraper belt, which is initiated by the feed roller or the pneumatic cylinder, is limited by the contact of the belt tip in the fiber collecting groove. This means that the feed roller slips under the optimally retracted scraper belt in the last stage of its rotation.
  • Such a design ensures, on the one hand, that the scraper belt is pushed into the fiber collecting groove in accordance with regulations, and on the other hand prevents the contact pressure of the band tip against the wall of the fiber collecting groove from becoming too great.
  • the feed path which the scraper belt travels when the cleaning device is retracted into the rotor is longer than the return path of the scraper belt when the cleaning device is retracted.
  • a stroke limiter is provided for this purpose, which is designed in such a way that the scraper belt can pass the stroke limiter unhindered in the feed direction, while it is clamped in the stroke limiter after a certain distance and thus blocked. In this case too, the feed roller can slip freely under the doctor belt and reach its starting position.
  • a sensor device is arranged in the exit area of the scraper belt store, which detects the leakage of the belt-like wear part, so that the operating personnel can intervene and insert a new scraper belt at the appropriate time. In this way, downtimes of the maintenance unit or malfunctions of the spinning units due to insufficient cleaning can be reliably avoided.
  • the maintenance units patrolling in the area of the spinning machines which automatically eliminate yarn breaks that occur, therefore have a cleaning device by means of which the rotor, in particular its fiber collecting groove, can be cleaned.
  • the cleaning head 5 of such a cleaning device is shown in section.
  • the cleaning head 5 is positioned in front of the open rotor housing 1 of an open-end rotor spinning unit.
  • a spinning rotor 2 is arranged within the rotor housing 1.
  • the spinning rotor 2 is supported with its rotor axis 3 on a running disk bearing and has a fiber collecting groove 4 in the region of its rotor head.
  • the cleaning head 5 has a drive device 6 that can be adjusted from the outside of the rotor head, for example a rubber-tired drive wheel 7 and a cleaning device 8 (see FIG. 1) that can be moved into the fiber collecting groove 4.
  • the cleaning device 8 is designed as a scraper 9 which can be extended in the direction of the fiber collecting groove 4.
  • the scraper 9 consists of a scraper belt 11 which is stored in a memory 10 and which can be extended or retracted in the direction of the fiber collecting groove 4 by means of a displacement device 12.
  • the displacement device 12 consists of a controllable pneumatic cylinder 13, the piston rod 19 of which is connected to a swivel lever 20.
  • the pivot lever 20 is in turn connected in a rotationally fixed manner to a feed roller 14.
  • a pressure roller 15 loaded by a spring element 21 rests on the feed roller 14.
  • the scraper belt 11 is non-positively clamped between the feed roller 14 and the pressure roller 15 and is pushed out in the direction of the fiber collecting groove 4 when the piston rod 19 of the pneumatic cylinder 13 is extended.
  • an actuating element not shown in the exemplary embodiment, for example a pressure screw acting on the spring element 21, can be provided.
  • the flexible, relatively thin scraper band 11 is supported in a guide channel 22, so that migration or kinking of the scraper band 11 when entering the fiber collecting groove 4 is reliably prevented.
  • the filling state or the idling of the doctor belt store 10 is monitored by a sensor device 18 which is arranged at the outlet of the store.
  • the sensor device 18 can be designed, for example, as a limit switch which rests on the scraper belt 11 with a pressure roller 25 and switches a contact in the absence of a scraper belt.
  • the displacement device 12 also has a stroke limiter 17 which is constructed in such a way that there is unimpeded sliding of the scraper belt in the direction of the fiber collecting groove 4, while in the opposite direction the passage of the scraper belt is blocked by the stroke limiter.
  • the stroke limiter 17 is in turn mounted in a longitudinally movable manner in a guide 24 of the cleaning device 5; its displacement is the measure of the return path of the scraper belt 11.
  • the stroke limiter 17 can have various embodiments. For example, it is possible to prevent the scraper belt from sliding through in the reset direction by using a clamping element 23.
  • a clamping element can be designed, for example, as a wedge element, as an eccentric roller or the like.
  • the cleaning head 5 is brought into position in front of the opened rotor housing 1.
  • the pneumatic cylinder 13 is acted upon via a line 24 so that its piston rod 19 extends and the pivot lever 20 is moved in the S direction.
  • the feed roller 14, which is non-rotatably connected to the pivoting lever 20 is rotated clockwise and the scraper belt 11 clamped between the feed roller 14 and the spring-loaded pressure roller 15 is pushed out non-positively in the direction of the fiber collecting groove 4.
  • the extension path of the scraper belt 11 is limited by the belt tip 16 resting in the fiber collecting groove 4.
  • the rotor 2 is slowly rotated by the drive device 6, that is to say by the drive wheel 7 lying on the outside of the rotor head.
  • the material of the scraper belt 11, for example a relatively easily wearing plastic, ensures that the belt tip 16 adapts well to the shape of the fiber collecting groove and thus the entire fiber collecting groove is reliably cleaned.
  • the pneumatic cylinder 13 is retracted and the feed roller 14 is thereby rotated counterclockwise. This means that the scraper belt 11 is withdrawn.
  • the stroke limiter 17 ensures that the return path of the scraper belt 11 is smaller than its feed path. In this way it is ensured that the through Wear-related shortening of the scraper belt is automatically compensated for the next time it is pushed out and the optimal length is set when the scraper belt 11 is moved into the fiber collecting groove of the spinning rotor.
  • a sensor device 18 indicates in good time when the scraper belt 11 stored in a scraper belt store 10 has reached a length which makes it advisable to change the scraper belt soon.
  • the invention is not limited to the exemplary embodiment described above, further embodiments not described in detail in the present application are conceivable both with regard to the displacement device or its drive and with regard to the stroke limiter or the scraper belt store, without departing from the inventive concept. It is essential to the invention that the optimal length of the scraper belt is automatically set when the cleaning device is moved into the rotor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

An appts. for cleaning a rotor running in the rotor housing of an open-end spinning unit has a scraper which can be placed in a predetermination position in the rotor fibre gathering groove (4). Here the scraper (9), when inserted into the rotor (2) cleaning device, automatically adopts an optimal length independently of erosion due to wear and tear. The scraper is thus guaranteed to settle reliably in the base of the groove (4). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Reinigen eines im Rotorgehäuse einer Offenend-Spinneinheit umlaufenden Rotors, mit einem in der Fasersammelrille des Rotors positionierbaren Schaber.The invention relates to a device for cleaning a rotor rotating in the rotor housing of an open-end spinning unit, with a scraper that can be positioned in the fiber collecting groove of the rotor.

Derartige Vorrichtungen sind durch zahlreiche Veröffentlichungen bekannt.Such devices are known from numerous publications.

In der DE 26 18 094 A1 ist beispielsweise eine in einer selbsttätigen Wartungseinheit angeordnete Reinigungsvorrichtung beschrieben, die ein in den Spinnrotor einfahrbares, an die Kontur der Fasersammelrille angepaßtes Schaberelement aufweist. Das Schaberelement ist dabei am Ende einer Stange befestigt. Außerdem weist das Schaberelement eine Einspritzeinrichtung für flüssige Reinigungsmittel auf. Durch eine solche Einrichtung kann die Fasersammelrille mechanisch gereinigt und zusätzlich ein Reinigungsmittel-Luftgemisch in den Rotor eingeblasen werden.DE 26 18 094 A1, for example, describes a cleaning device which is arranged in an automatic maintenance unit and has a scraper element which can be moved into the spinning rotor and is adapted to the contour of the fiber collecting groove. The scraper element is attached to the end of a rod. In addition, the scraper element has an injection device for liquid cleaning agents. With such a device, the fiber collecting groove can be mechanically cleaned and additionally a detergent-air mixture can be blown into the rotor.

Durch die DE 39 11 946 A1 ist eine speziell für kleine Rotordurchmesser konzipierte Reinigungsvorrichtung bekannt. Die eigentliche Reinigungsvorrichtung ist dabei in einem Gehäuse angeordnet, das vor der geöffneten Spinnbox positioniert wird. Innerhalb des Gehäuses ist schwenkbar ein Träger gelagert, dessen Drehachse zur Rotorachse versetzt und spitzwinklig geneigt angeordnet ist. Der Träger weist räumlich eine solche Gestalt auf, daß das mit dem Reinigungswerkzeug besetzte Ende bei Drehung um die Achse einen Kreisbogen beschreibt, der die Ebene der Fasersammelrille des Rotors schneidet. Das Reinigungswerkzeug wird in einer vorwärtsgerichteten Bewegung durch die Rotoröffnung auf den zu reinigenden Teil des Rotors zugestellt.DE 39 11 946 A1 discloses a cleaning device specially designed for small rotor diameters. The actual cleaning device is arranged in a housing that is positioned in front of the open spin box. A carrier is pivotally mounted within the housing, whose axis of rotation is offset from the rotor axis and is arranged at an acute angle. The carrier has a spatial shape such that the end occupied with the cleaning tool, when rotated about the axis, describes an arc that intersects the plane of the fiber collecting groove of the rotor. The cleaning tool is fed in a forward movement through the rotor opening to the part of the rotor to be cleaned.

Des weiteren ist durch die DE 37 15 934 A1 eine Reinigungseinrichtung bekannt, deren Schaber endseitig an der Kolbenstange eines pneumatischen Schubkolbengetriebes angeordnet in Richtung der Fasersammelrille in den Rotor einer OE-Spinneinheit einfahrbar ist. Der Schaber weist ein messerartiges Endteil auf, das bis in die Fasersammelrille reicht und in der Messerebene derart entgegen der Drehrichtung des Rotors abgewinkelt ist, daß die Vorderkante gegen die Drehrichtung des Rotors geneigt verläuft.Furthermore, a cleaning device is known from DE 37 15 934 A1, the scraper of which is arranged on the end of the piston rod of a pneumatic thrust piston transmission and can be moved into the rotor of an OE spinning unit in the direction of the fiber collecting groove. The scraper has a knife-like end part which extends into the fiber collecting groove and is angled in the knife plane against the direction of rotation of the rotor in such a way that the front edge is inclined towards the direction of rotation of the rotor.

In der DE 26 29 161 C2 sowie der DE 33 13 926 A1 sind außerdem Reinigungseinrichtungen für Rotorspinnvorrichtungen beschrieben, die rotierbar gelagerte Reinigungswerkzeuge aufweisen. Als Reinigungswerkzeuge finden Schabereinsätze Verwendung, die endseitig auf Spiralfedern positioniert sind. Während des Reinigungsvorganges legen sich die umlaufenden Schabereinsätze unter dem Einfluß der Massenfliehkräfte in die Rotorrille und reinigen diese von anhaltenden Schmutzpartikeln.DE 26 29 161 C2 and DE 33 13 926 A1 also describe cleaning devices for rotor spinning devices which have cleaning tools mounted in a rotatable manner. Scraper inserts are used as cleaning tools, which are positioned at the ends on spiral springs. During the cleaning process, the rotating scraper inserts lay under the influence of the centrifugal forces in the rotor groove and clean them of persistent dirt particles.

Da die Position der Schabereinsätze aufgrund ihrer Anordnung auf den elastischen Spiralfedern radial verstellbar ist, wird Verschleißabrieb der Schabereinsätze automatisch ausgeglichen.Since the position of the scraper inserts can be adjusted radially due to their arrangement on the elastic coil springs, wear wear on the scraper inserts is automatically compensated for.

Eine solche elastische Lagerung der Reinigungswerkzeuge hat allerdings den Nachteil, daß die Gefahr besteht, daß die Schaberelemente bei festsitzenden Verunreinigungen ungenügend angestellt werden beziehungsweise zurückfedern. In diesen Fällen ist eine einwandreie Reinigung der Fasersammelrille des Spinnrotors nicht gewährleistet.However, such an elastic mounting of the cleaning tools has the disadvantage that there is a risk that the scraper elements are insufficient in the case of impurities which are stuck be employed or spring back. In these cases, the fiber collection groove of the spinning rotor cannot be cleaned properly.

Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine verbesserte Reinigungseinrichtung für Offenend-Rotorspinneinheiten zu schaffen.Starting from the aforementioned prior art, the invention has for its object to provide an improved cleaning device for open-end rotor spinning units.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung gelöst, wie sie Gegenstand des Anspruches 1 ist.This object is achieved according to the invention by a device as is the subject of claim 1.

Die erfindungsgemäße Ausbildung des Schabers hat den Vorteil, daß der Schaber beim Einfahren der Reinigungseinrichtung in den Rotor, unabhängig von seinem Verschleißabrieb, automatisch eine optimale Länge annimmt, die eine Anlage des Schabers im Grund der Fasersammelrille gewährleistet. Auf diese Weise ist sichergestellt, daß der Schaber vom ersten bis zum letzten Reinigungsvorgang, unabhängig vom Verschmutzungsgrad des Spinnrotors , gleichbleibend wirksam ist.The design of the scraper according to the invention has the advantage that the scraper automatically adopts an optimal length when the cleaning device is moved into the rotor, regardless of its wear, which ensures that the scraper contacts the bottom of the fiber collecting groove. This ensures that the scraper is consistently effective from the first to the last cleaning process, regardless of the degree of contamination of the spinning rotor.

Vorzugsweise ist der Schaber dabei als bandartiges Verschleißteil ausgebildet, so daß die Standzeit derartiger Reinigungseinrichtungen gegenüber bekannten Einrichtungen deutlich verlängert wird. Da außerdem die optimale Länge des Schaberbandes beim Einfahren in die Fasersammelrille automatisch nachgestellt wird, können Kontrollinspektionen durch das Bedienpersonal weitestgehend entfallen beziehungsweise deutlich eingeschränkt werden. Insgesamt wird durch die erfindungsgemäße Vorrichtung eine erhebliche Entlastung des Maschinenpersonals erreicht.The scraper is preferably designed as a band-like wearing part, so that the service life of such cleaning devices is significantly extended compared to known devices. In addition, since the optimal length of the scraper belt is automatically adjusted when entering the fiber collecting groove, control inspections by the operating personnel can be largely dispensed with or significantly restricted. Overall, the device according to the invention considerably relieves the strain on machine personnel.

In bevorzugter Ausführungsform ist das Schaberband mit seiner Verschiebeeinrichtung kraftschlüssig verbunden. Eine unter Federkraft auf dem Schaberband aufliegende Druckrolle erzeugt dabei zwischen dem Schaberband und der angetriebenen Vorschubwalze der Verschiebeeinrichtung gerade so viel Reibung wie notwendig ist, um das Schaberband ausreichend fest in der Fasersammelrille des Spinnrotors zur Anlagezubringen, das heißt, um eine sichere Reinigung dieses kritischen Bereiches zu gewährleisten. Andererseits kann die Vorschubwalze, wenn das Schaberband in der Fasersammelrille zur Anlage gekommen ist, frei unter dem Schaberband durchrutschen, so daß überhöhter Verschleiß durch zu starken Andruck vermieden wird.In a preferred embodiment, the scraper belt is non-positively connected to its displacement device. A pressure roller resting on the scraper belt under spring force is produced just as much friction as is necessary between the scraper belt and the driven feed roller of the displacement device in order to bring the scraper belt into contact sufficiently firmly in the fiber collecting groove of the spinning rotor, that is to say to ensure safe cleaning of this critical area. On the other hand, when the scraper belt comes to rest in the fiber collecting groove, the feed roller can slide freely under the scraper belt, so that excessive wear due to excessive pressure is avoided.

Vorzugsweise besteht die Verschiebeeinrichtung für das Schaberband aus einer, einen Schwenkhebel aufweisenden Vorschubwalze, einer federbeaufschlagten Druckrolle sowie einem mit seiner Kolbenstange an den Schwenkhebel angeschlossenen Pneumatikzylinder. Beim Aus- beziehungsweise Einfahren der Kolbenstange wird die Vorschubwalze im Uhrzeigersinn beziehungsweise im Gegenuhrzeigersinn gedreht und nimmt dabei über Reibschluß das zwischen Vorschubwalze und Druckrolle geklemmte Schaberband in der jeweiligen Drehrichtung der Vorschubwalze mit.The displacement device for the scraper belt preferably consists of a feed roller having a pivoting lever, a spring-loaded pressure roller and a pneumatic cylinder connected to the pivoting lever with its piston rod. When the piston rod is extended or retracted, the feed roller is rotated clockwise or counterclockwise and thereby takes the scraper belt clamped between the feed roller and the pressure roller in the respective direction of rotation of the feed roller.

In bevorzugter Ausführungsform ist die Anordnung dabei so getroffen, daß der durch die Vorschubwalze beziehungsweise den Pneumatikzylinder iniziierte Vorschubweg des Schaberbandes durch die Anlage der Bandspitze in der Fasersammelrille begrenzt wird. Das heißt, die Vorschubwalze rutscht im letzten Stadium ihrer Drehung unter dem optimal eingefahrenen Schaberband durch. Eine solche Ausbildung gewährleistet einerseits, daß das Schaberband vorschriftsmäßig in die Fasersammelrille eingeschoben ist, andererseits wird verhindert, daß der Anpreßdruck der Bandspitze an die Fasersammelrillenwandung zu groß wird.In a preferred embodiment, the arrangement is such that the feed path of the scraper belt, which is initiated by the feed roller or the pneumatic cylinder, is limited by the contact of the belt tip in the fiber collecting groove. This means that the feed roller slips under the optimally retracted scraper belt in the last stage of its rotation. Such a design ensures, on the one hand, that the scraper belt is pushed into the fiber collecting groove in accordance with regulations, and on the other hand prevents the contact pressure of the band tip against the wall of the fiber collecting groove from becoming too great.

Im Interesse einer einwandfreien, automatischen Nachstellung ist außerdem vorgesehen, daß der Vorschubweg, den das Schaberband beim Einfahren der Reinigungsvorrichtung in den Rotor zurücklegt, länger ist als der Rückstellweg des Schaberbandes beim Zurückziehen der Reinigungseinrichtung. Vorteilhafterweise ist für diesen Zweck ein Hubbegrenzer vorgesehen, der derart gestaltet ist, daß das Schaberband in Vorschubrichtung den Hubbegrenzer ungehindert passieren kann, während es in Rückstellrichtung nach einer gewissen Wegstrecke im Hubbegrenzer geklemmt und damit blockiert wird. Auch in diesem Fall kann die Vorschubwalze ungehindert unter dem Schaberband durchrutschen und in ihre Ausgangsposition gelangen.In the interest of a flawless, automatic readjustment, it is also provided that the feed path which the scraper belt travels when the cleaning device is retracted into the rotor is longer than the return path of the scraper belt when the cleaning device is retracted. Advantageously, a stroke limiter is provided for this purpose, which is designed in such a way that the scraper belt can pass the stroke limiter unhindered in the feed direction, while it is clamped in the stroke limiter after a certain distance and thus blocked. In this case too, the feed roller can slip freely under the doctor belt and reach its starting position.

In Weiterbildung der Erfindung ist im Ausgangsbereich des Schaberbandspeichers eine Sensoreinrichtung angeordnet, die das Auslaufen des bandartigen Verschleißteiles detektiert, so daß das Bedienpersonal eingreifen und zu gegebener Zeit ein neues Schaberband einlegen kann. Auf diese Weise können Stillstandzeiten der Wartungseinheit oder Fehlfunktionen der Spinneinheiten aufgrund ungenügender Reinigung zuverlässig vermieden werden.In a further development of the invention, a sensor device is arranged in the exit area of the scraper belt store, which detects the leakage of the belt-like wear part, so that the operating personnel can intervene and insert a new scraper belt at the appropriate time. In this way, downtimes of the maintenance unit or malfunctions of the spinning units due to insufficient cleaning can be reliably avoided.

Weitere Einzelheiten der Erfindung sind einem nachfolgend anhand der Zeichnungen dargestellten Ausführungsbeispiele entnehmbar. Es zeigen:

Fig. 1
eine Seitenansicht einer vor einer OE-Rotorspinneinheit positionierten Reinigungseinrichtung im Schnitt,
Fig. 2
eine Draufsicht der in Fig. 1 dargestellten Reinigungseinrichtung,
Fig. 3
eine Draufsicht gemäß Schnitt III-III der Fig. 1.
Further details of the invention can be found in an exemplary embodiment shown below with reference to the drawings. Show it:
Fig. 1
2 shows a side view of a cleaning device positioned in front of an OE rotor spinning unit,
Fig. 2
2 shows a top view of the cleaning device shown in FIG. 1,
Fig. 3
a plan view according to section III-III of FIG. 1st

Beim Betrieb von Offenend-Rotorspinnmaschinen ist es üblich, vor dem Neuanspinnen einer Spinneinheit den Rotor zu reinigen. Insbesondere die Fasersammelrille des Rotors muß von anhaftendem Faserstaub und anderen Verschmutzungen gereinigt werden, da sonst kein einwandfrei es Spinnergebnis zu erzielen ist.When operating open-end rotor spinning machines, it is common to clean the rotor before re-spinning a spinning unit. In particular, the fiber collecting groove of the rotor must be cleaned of adhering fiber dust and other soiling, since otherwise it is not possible to achieve a perfect spinning result.

Die im Bereich der Spinnmaschinen patroullierenden Wartungseinheiten, die auftretende Fadenbrüche selbstätig beseitigen, weisen daher eine Reinigungseinrichtung auf, mittels derer eine Reinigung des Rotors insbesondere seiner Fasersammelrille möglich ist.The maintenance units patrolling in the area of the spinning machines, which automatically eliminate yarn breaks that occur, therefore have a cleaning device by means of which the rotor, in particular its fiber collecting groove, can be cleaned.

In Fig. 1 ist der Reinigungskopf 5 einer solchen Reinigungseinrichtung im Schnitt dargestellt. Der Reinigungskopf 5 ist vor dem geöffneten Rotorgehäuse 1 einer Offenend-Rotorspinneinheit positioniert. Innerhalb des Rotorgehäuses 1 ist ein Spinnrotor 2 angeordnet. Der Spinnrotor 2 ist dabei , wie bekannt und daher nicht näher dargestellt, mit seiner Rotorachse 3 auf einer Laufscheiben-Lagerung abgestützt und weist im Bereich seines Rotorkopfes eine Fasersammelrille 4 auf.In Fig. 1, the cleaning head 5 of such a cleaning device is shown in section. The cleaning head 5 is positioned in front of the open rotor housing 1 of an open-end rotor spinning unit. A spinning rotor 2 is arranged within the rotor housing 1. As is known and therefore not shown in detail, the spinning rotor 2 is supported with its rotor axis 3 on a running disk bearing and has a fiber collecting groove 4 in the region of its rotor head.

Wie in Fig. 2 angedeutet, weist der Reinigungskopf 5 eine von außen an den Rotorkopf anstellbare Antriebseinrichtung 6, zum Beispiel ein gummibereiftes Antriebsrad 7 sowie eine (siehe Fig. 1) in die Fasersammelrille 4 einfahrbare Reinigungseinrichtung 8 auf. Die Reinigungseinrichtung 8 ist dabei als ein in Richtung Fasersammelrille 4 ausfahrbarer Schaber 9 ausgebildet. Der Schaber 9 besteht aus einem, in einem Speicher 10 bevorrateten Schaberband 11, das mittels einer Verschiebeeinrichtung 12 in Richtung Fasersammelrille 4 ausgefahren beziehungsweise eingefahren werden kann.As indicated in FIG. 2, the cleaning head 5 has a drive device 6 that can be adjusted from the outside of the rotor head, for example a rubber-tired drive wheel 7 and a cleaning device 8 (see FIG. 1) that can be moved into the fiber collecting groove 4. The cleaning device 8 is designed as a scraper 9 which can be extended in the direction of the fiber collecting groove 4. The scraper 9 consists of a scraper belt 11 which is stored in a memory 10 and which can be extended or retracted in the direction of the fiber collecting groove 4 by means of a displacement device 12.

Im Einzelnen besteht die Verschiebeeinrichtung 12 aus einem ansteuerbaren Pneumatikzylinder 13, dessen Kolbenstange 19 an einen Schwenkhebel 20 angeschlossen ist. Der Schwenkhebel 20 ist seinerseits drehfest mit einer Vorschubwalze 14 verbunden. Auf der Vorschubwalze 14 liegt eine durch ein Federelement 21 belastete Druckrolle 15 auf. Das Schaberband 11 ist zwischen der Vorschubwalze 14 und der Druckwalze 15 kraftschlüssig geklemmt und wird beim Ausfahren der Kolbenstange 19 des Pneumatikzylinders 13 in Richtung Fasersammelrille 4 ausgeschoben. Zum Einstellen des Auflagedruckes der Druckrolle 15 kann ein im Ausführungsbeispiel nicht dargestelltes Stellelement, zum Beispiel eine auf das Federelement 21 wirkende Druckschraube vorgesehen sein.In detail, the displacement device 12 consists of a controllable pneumatic cylinder 13, the piston rod 19 of which is connected to a swivel lever 20. The pivot lever 20 is in turn connected in a rotationally fixed manner to a feed roller 14. A pressure roller 15 loaded by a spring element 21 rests on the feed roller 14. The scraper belt 11 is non-positively clamped between the feed roller 14 and the pressure roller 15 and is pushed out in the direction of the fiber collecting groove 4 when the piston rod 19 of the pneumatic cylinder 13 is extended. To set the contact pressure of the pressure roller 15, an actuating element, not shown in the exemplary embodiment, for example a pressure screw acting on the spring element 21, can be provided.

Ausgangsseitig ist das biegsame, relativ dünne Schaberband 11 in einem Führungskanal 22 abgestützt, so daß ein Auswandern oder Ausknicken des Schaberbandes 11 beim Einfahren in die Fasersammelrille 4 zuverlässig verhindert wird.On the output side, the flexible, relatively thin scraper band 11 is supported in a guide channel 22, so that migration or kinking of the scraper band 11 when entering the fiber collecting groove 4 is reliably prevented.

Der Füllzustand beziehungsweise das Leerlaufen des Schaberbandspeichers 10 wird durch eine Sensoreinrichtung 18 überwacht, die am Ausgang des Speichers angeordnet ist. Die Sensoreinrichtung 18 kann beispielsweise als Endschalter ausgebildet sein, der mit einem Druckröllchen 25 auf dem Schaberband 11 aufliegt und bei fehlendem Schaberband einen Kontakt schaltet.The filling state or the idling of the doctor belt store 10 is monitored by a sensor device 18 which is arranged at the outlet of the store. The sensor device 18 can be designed, for example, as a limit switch which rests on the scraper belt 11 with a pressure roller 25 and switches a contact in the absence of a scraper belt.

Die Verschiebeeinrichtung 12 weist des weiteren einen Hubbegrenzer 17 auf, der so konstruiert ist, daß ein ungehindertes Durchgleiten des Schaberbandes in Richtung auf die Fasersammelrille 4 gegeben ist, während in Gegenrichtung der Durchschub des Schaberbandes durch den Hubbegrenzer gesperrt ist. Der Hubbegrenzer 17 ist seinerseits längsbeweglich in einer Führung 24 der Reinigungseinrichtung 5 gelagert; sein Verschiebeweg ist das Maß für den Rückstellweg des Schaberbandes 11. Der Hubbegrenzer 17 kann verschiedene Ausführungsformen aufweisen. Es ist beispielsweise möglich, das Durchgleiten des Schaberbandes in Rückstellrichtung durch den Einsatz eines Klemmelementes 23 zu unterbinden. Ein solches Klemmelement kann beispielsweise als Keilelement, als Exzenterwalze oder dergleichen ausgebildet sein.The displacement device 12 also has a stroke limiter 17 which is constructed in such a way that there is unimpeded sliding of the scraper belt in the direction of the fiber collecting groove 4, while in the opposite direction the passage of the scraper belt is blocked by the stroke limiter. The stroke limiter 17 is in turn mounted in a longitudinally movable manner in a guide 24 of the cleaning device 5; its displacement is the measure of the return path of the scraper belt 11. The stroke limiter 17 can have various embodiments. For example, it is possible to prevent the scraper belt from sliding through in the reset direction by using a clamping element 23. Such a clamping element can be designed, for example, as a wedge element, as an eccentric roller or the like.

Funktion der Reinigungsvorrichtung:Function of the cleaning device:

Sobald die Wartungseinheit vor einer Spinneinheit positioniert und die Spinnbox geöffnet ist, wird der Reinigungskopf 5 vor dem geöffneten Rotorgehäuse 1 in Stellung gebracht. Der Pneumatikzylinder 13 wird über eine Leitung 24 beaufschlagt, so daß seine Kolbenstange 19 ausfährt und den Schwenkhebel 20 in Richtung S verlegt. Dadurch wird die drehfest mit dem Schwenkhebel 20 verbundene Vorschubwalze 14 im Uhrzeigersinn gedreht und das zwischen der Vorschubwalze 14 und der federbeaufschlagten Druckrolle 15 geklemmte Schaberband 11 kraftschlüssig in Richtung der Fasersammelrille 4 ausgeschoben. Der Ausschubweg des Schaberbandes 11 wird dabei durch Anlage der Bandspitze 16 in der Fasersammelrille 4 begrenzt. Gleichzeitig wird der Rotor 2 durch die Antriebseinrichtung 6, das heißt, durch das außen am Rotorkopf anliegende Antriebsrad 7 langsam gedreht. Das Material des Schaberbandes 11, zum Beispiel ein relativ leicht verschleißender Kunststoff, stellt dabei sicher, daß sich die Bandspitze 16 gut auf die Form der Fasersammelrille anpaßt und somit die gesamte Fasersammelrille zuverlässig gereinigt wird.As soon as the maintenance unit is positioned in front of a spinning unit and the spinning box is opened, the cleaning head 5 is brought into position in front of the opened rotor housing 1. The pneumatic cylinder 13 is acted upon via a line 24 so that its piston rod 19 extends and the pivot lever 20 is moved in the S direction. As a result, the feed roller 14, which is non-rotatably connected to the pivoting lever 20, is rotated clockwise and the scraper belt 11 clamped between the feed roller 14 and the spring-loaded pressure roller 15 is pushed out non-positively in the direction of the fiber collecting groove 4. The extension path of the scraper belt 11 is limited by the belt tip 16 resting in the fiber collecting groove 4. At the same time, the rotor 2 is slowly rotated by the drive device 6, that is to say by the drive wheel 7 lying on the outside of the rotor head. The material of the scraper belt 11, for example a relatively easily wearing plastic, ensures that the belt tip 16 adapts well to the shape of the fiber collecting groove and thus the entire fiber collecting groove is reliably cleaned.

Nach Beendigung des Reinigungsvorganges wird der Pneumatikzylinder 13 eingefahren und dadurch die Vorschubwalze 14 im Gegenuhrzeigersinn gedreht. Das bedeutet, das Schaberband 11 wird zurückgezogen. Der Hubbegrenzer 17 stellt dabei sicher, daß der Rückholweg des Schaberbandes 11 kleiner ist als dessen Vorschubweg. Auf diese Weise ist gewährleistet, daß das durch Verschleiß bedingte Einkürzen des Schaberbandes beim nächsten Ausschub automatisch ausgeglichen wird und beim Einfahren des Schaberbandes 11 in die Fasersammelrille des Spinnrotors die optimale Länge eingestellt wird.After the cleaning process has ended, the pneumatic cylinder 13 is retracted and the feed roller 14 is thereby rotated counterclockwise. This means that the scraper belt 11 is withdrawn. The stroke limiter 17 ensures that the return path of the scraper belt 11 is smaller than its feed path. In this way it is ensured that the through Wear-related shortening of the scraper belt is automatically compensated for the next time it is pushed out and the optimal length is set when the scraper belt 11 is moved into the fiber collecting groove of the spinning rotor.

Eine Sensoreinrichtung 18 zeigt dabei rechtzeitig an, wenn das in einem Schaberbandspeicher 10 bevorratete Schaberband 11 eine Länge erreicht hat, die ein baldiges Wechseln des Schaberbandes angeraten erscheinen läßt.A sensor device 18 indicates in good time when the scraper belt 11 stored in a scraper belt store 10 has reached a length which makes it advisable to change the scraper belt soon.

Die Erfindung ist nicht auf das vorstehend beschriebene Ausführungsbeispiel beschränkt, es sind sowohl hinsichtlich der Verschiebeeinrichtung beziehungsweise deren Antrieb sowie hinsichtlich des Hubbegrenzers oder des Schaberbandspeichers weitere, in der vorliegenden Anmeldung nicht näher beschriebene Ausführungsformen denkbar, ohne daß der Erfindungsgedanke verlassen wird. Erfindungswesentlich ist vor allem, daß beim Einfahren der Reinigungseinrichtung in den Rotor automatisch die optimale Länge des Schaberbandes eingestellt wird.The invention is not limited to the exemplary embodiment described above, further embodiments not described in detail in the present application are conceivable both with regard to the displacement device or its drive and with regard to the stroke limiter or the scraper belt store, without departing from the inventive concept. It is essential to the invention that the optimal length of the scraper belt is automatically set when the cleaning device is moved into the rotor.

Claims (9)

Vorrichtung zum Reinigen eines im Rotorgehäuse einer Offenend-Spinneinheit umlaufenden Rotors , mit einem in der Fasersammelrille des Rotors in einer vorgegebenen Stellung positionierbaren Schaber,
dadurch gekennzeichnet,
daß der Schaber (9) beim Einfahren der Reinigungseinrichtung (8) in den Rotor (2), unabhängig von seinem Verschleißabrieb, automatisch eine optimale Länge annimmt, so daß eine sichere Anlage des Schabers (9) im Grund der Fasersammelrille (4) gewährleistet ist.Device for cleaning a rotor rotating in the rotor housing of an open-end spinning unit, with a scraper that can be positioned in a predetermined position in the fiber collecting groove of the rotor,
characterized,
that the scraper (9) automatically adopts an optimal length when the cleaning device (8) moves into the rotor (2), regardless of its wear, so that a secure contact of the scraper (9) in the base of the fiber collecting groove (4) is ensured . Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Schaber (9) als bandartiges Verschleißteil ausgebildet ist, das beim Einfahren der Reinigungseinrichtung (8) in den Rotor (2) automatisch auf die optimale Länge ausgefahren wird.Apparatus according to claim 1, characterized in that the scraper (9) is designed as a band-like wear part which is automatically extended to the optimum length when the cleaning device (8) is moved into the rotor (2). Vorrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß das Verschleißteil als biegsames , in einem Speicher (10) bevorratetes und durch eine Verschiebeeinrichtung (12) kraftschlüssig beaufschlagbares Schaberband (11) ausgebildet ist.Apparatus according to claims 1 and 2, characterized in that the wearing part is designed as a flexible scraper band (11) which is stored in a store (10) and can be positively loaded by a displacement device (12). Vorrichtung nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Verschiebeeinrichtung (12) eine an ein Antriebselement (13), vorzugsweise einen Pneumatikzylinder, angeschlossene Vorschubwalze (14) sowie eine unter Federwirkung aufliegende Druckrolle (15) aufweist.Device according to Claims 1 to 3, characterized in that the displacement device (12) has a feed roller (14) connected to a drive element (13), preferably a pneumatic cylinder, and a pressure roller (15) resting on it under spring action. Vorrichtung nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichnet, daß der über die Vorschubwalze (14) kraftschlüssig eingeleitete Vorschubweg des Schaberbandes (11) durch die Anlage der Bandspitze (16) in der Fasersammelrille (4) begrenzt wird.Device according to one or more of the preceding claims, characterized in that the feed path of the scraper belt (11), which is introduced non-positively via the feed roller (14), is limited by the contact of the belt tip (16) in the fiber collecting groove (4). Vorrichtung nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichent, daß am Schaberband (11) ein Hubbegrenzer (17) wirksam wird, der den Rückstellweg des Schaberbandes begrenzt.Device according to one or more of the preceding claims, characterized in that a stroke limiter (17) acts on the scraper belt (11) and limits the return path of the scraper belt. Vorrichtung nach Anspruch 5 und 6, dadurch gekennzeichnet, daß der Vorschubweg des Schaberbandes (11) länger ist als dessen vom Hubbegrenzer (17) beeinflußter Rückstellweg.Apparatus according to claims 5 and 6, characterized in that the feed path of the scraper belt (11) is longer than its return path influenced by the stroke limiter (17). Vorrichtung nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichnet, daß eine Sensoreinrichtung (18) vorgesehen ist, die ein Leerlaufen des Schaberbandspeichers (10) detektiert.Device according to one or more of the preceding claims, characterized in that a sensor device (18) is provided which detects that the scraper belt store (10) is running empty. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Hubbegrenzer (17) derart ausgebildet ist, daß das Schaberband (11) in Vorschubrichtung (V) den Hubbegrenzer (17) ungehindert passieren kann, während es in Rückstellrichtung (R) zu einer Blockierung des Schaberbandes kommt.Apparatus according to claim 6, characterized in that the stroke limiter (17) is designed in such a way that the scraper belt (11) can pass through the stroke limiter (17) unhindered in the feed direction (V), while blocking the scraper belt in the return direction (R) is coming.
EP95103545A 1994-03-31 1995-03-11 Device for cleaning a rotor rotating in the rotor casing of a open-end spinning unit Expired - Lifetime EP0675217B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4411343A DE4411343A1 (en) 1994-03-31 1994-03-31 Device for cleaning a rotor rotating in the rotor housing of an open-end spinning unit
DE4411343 1994-03-31

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EP0675217A1 true EP0675217A1 (en) 1995-10-04
EP0675217B1 EP0675217B1 (en) 1998-06-03

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DE10052672A1 (en) 2000-10-24 2002-05-02 Schlafhorst & Co W Rotary drive for a spinning rotor during its cleaning
DE10057230A1 (en) * 2000-11-18 2002-05-23 Schlafhorst & Co W Spinning rotor cleaning has arm and cleaning head applied by pneumatic cylinder at regulated pressure
DE102007062601A1 (en) 2007-12-22 2009-06-25 Oerlikon Textile Gmbh & Co. Kg Groove's degree of contamination determining method for spinning rotor of open-ended spinning device, involves stopping spinning device for cleaning groove, when actual length of thread section reaches or exceeds preset threshold value
DE102015101590A1 (en) * 2015-02-04 2016-08-04 Rieter Ingolstadt Gmbh Cleaning head and cleaning device for cleaning a spinning rotor and method for cleaning a spinning rotor
EP4015680A1 (en) * 2020-12-18 2022-06-22 Saurer Intelligent Technology AG Cleaning device for a yarn forming element of an air spinning nozzle and method for cleaning such a yarn forming element
CN112760764A (en) * 2021-01-19 2021-05-07 卓郎（江苏）纺织机械有限公司 Self-cleaning structure of rotor spinning device, textile machine and self-cleaning operation method

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FR2313471A1 (en) * 1975-06-03 1976-12-31 Nuova San Giorgio Spa DEVICE FOR CLEANING THE PERIPHERY OF A ROTOR OF A FREE FIBER SPINNING HEAD
EP0022091A1 (en) * 1979-06-26 1981-01-07 Officine Savio S.p.A. Procedure for cleaning a rotor of a spinning unit in an open-end type spinning frame, and device for carrying out said procedure
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US5609015A (en) 1997-03-11
DE59502380D1 (en) 1998-07-09
DE4411343A1 (en) 1995-10-05

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