EP0493768B1 - Device for guiding back a yarn end and a cover for, at least, one spinning nozzle - Google Patents

Device for guiding back a yarn end and a cover for, at least, one spinning nozzle Download PDF

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Publication number
EP0493768B1
EP0493768B1 EP91122068A EP91122068A EP0493768B1 EP 0493768 B1 EP0493768 B1 EP 0493768B1 EP 91122068 A EP91122068 A EP 91122068A EP 91122068 A EP91122068 A EP 91122068A EP 0493768 B1 EP0493768 B1 EP 0493768B1
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EP
European Patent Office
Prior art keywords
recess
spinning nozzle
docking body
air
nozzle
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.)
Expired - Lifetime
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EP91122068A
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German (de)
French (fr)
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EP0493768A1 (en
Inventor
Martin Tobler
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0493768A1 publication Critical patent/EP0493768A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing

Definitions

  • the invention relates to a device for returning a thread end according to the preamble of claim 1 and a casing for a spinneret for docking such a device.
  • the blowing nozzle has a guide area and a thread style with a blowing element which is designed to act back and forth so as to act on the guide area.
  • This thread style is open on one side and forms a closed channel in the longitudinal direction with the guide area.
  • the blowing element leads through a channel at an angle of approximately 45 ° into the longitudinal channel of the blowing nozzle.
  • the object of the invention is to provide such a return element that has an excellent suction effect on the thread end and at the same time reliably carry out the thread end through a narrow and long spinneret channel, even if the spinneret is formed in two parts from an injector nozzle and a swirl nozzle.
  • blowing air can now be blown axially into the spinneret. Another advantage arises from the fact that a greater suction effect is exerted on the thread end, so that the thread end is reliably sucked into the docking body.
  • the axial blowing air flow also ensures that the thread end is reliably and quickly passed through the entire spinneret.
  • a docking body 1 is shown schematically with a spinneret 2, which consists of an injector 3 and a swirl nozzle 4.
  • air extraction channels are provided, which are not shown here.
  • the docking body 1 is together with a memory 21 on a known per se Operating trolley attached to the maintenance of the spinning positions of a spinning machine, and consists of a housing 6, on which an air blowing nozzle 7 is arranged below a pair of transport rollers 8.
  • One of the transport rollers 8 is connected to a drive motor 12 via a drive shaft 10 and a clutch 11.
  • the other transport roller 8 is resiliently pressed against one and can be folded away from it.
  • a thread guide 9, shown merely schematically, is arranged above the transport rollers 8.
  • the entire housing is longitudinally movable on guide rollers 13 on a rail element 14.
  • the rail element 14 is fastened in a conventional manner on the frame of the service trolley, not shown.
  • a downwardly stepped link 15 is provided, the function of which will be described with reference to FIG. 2.
  • a piston 16 is provided in a long cylinder 17, which allows a rod 18 to move back and forth.
  • the rod 18 is connected to the housing 6 via an articulated connection 19.
  • the housing can thus be moved back and forth on the transport rollers 13. It goes without saying that other drives can also be provided for the mobile housing 6.
  • the thread end of the thread 20 shown in broken lines is now sought by a winding unit (not shown) with a suction nozzle and is inserted between the transport rollers 8 via the thread guide 9 provided with a hook and brought in front of the inlet of the air blowing nozzle 7.
  • the bobbin is rotated back in a known manner with a friction roller, the excess thread being stored in the memory 21.
  • the rollers 8 are brought together and thus clamp the thread end.
  • the housing 6 is moved into the docking position, which can be seen in FIG. 2.
  • the housing lies at a slight oblique angle to the rail element 14, so that the blowing nozzle and the transport rollers 8 initially slightly above that Arrive the spinneret in the casing 5.
  • the link 15 can also be designed such that the front guide roller 13 is constantly guided by the rail element 14.
  • Fig. 3 now shows the air blowing nozzle 7 in more detail.
  • the air blowing nozzle 7 is shown in longitudinal section and the various views of the air blowing nozzle 7 are given, Fig. 3a shows the view in direction A (top view), Fig 3b shows the view in direction B (bottom view) and Fig. 3c the View in direction C (side view).
  • the air blowing nozzle 7 now has a slot or a slot-shaped recess 22 which is connected from above to a labyrinth-like compressed air channel 23.
  • holes are made in the body of the air-blowing nozzle 7 which are perpendicular to each other and are each closed off with a pin 24a or 24b, so that a continuous channel 23 is created.
  • the slot 22 is provided on the inside with a circular cylindrical wall 25 and is formed like a blind hole upwards along the spinning axis.
  • the compressed air channel 23 is connected to the slot 22 via a blowing opening 26 of smaller diameter.
  • the blowing opening 26 and the circular-cylindrical wall 25 are formed exactly in the spinning axis 27.
  • a funnel-shaped inlet 28 is provided to the side of this blowing opening 26, the funnel axis of which forms an acute angle 30 with the spinning axis. This angle 30 is in the range from 15 ° to 45 °, preferably around 30 °.
  • Below the air injection nozzle 7, a larger recess 31 is provided in the area of the slot 22, which is connected to a groove 32 which is narrower and less wide than the recess 31.
  • the side 33 assigned to the slot 22 is rounded in a prismatic or cylindrical manner.
  • the assigned side 33 form part of a prism with the base of a regular n-corner (eg 6-corner).
  • the assigned side 33 has the shape of a circular cylinder.
  • the recess 31 and the groove 32 now prevent an air cushion from being formed between the air injection nozzle 7 and the spinneret 2, on which the air blowing nozzle 7 has been placed.
  • the groove 32 is also designed so small that only a little air can escape and most of the blown air is passed through the spinneret.
  • At the end of the groove 32 there is a fixedly arranged knife 34 or merely a sharp edge on the air blowing nozzle 7 in order to cut off the thread end.
  • the exact functional sequence of the return is now as follows: The thread end is threaded, as described above, between the transport rollers, the thread end being guided into the groove 32 and cut off by means of the knife 34 or the sharp edge. The entire housing is moved into the docking position (Fig. 2). Then the compressed air of the air blowing nozzle is switched on, so that the thread end is blown into the nozzle. Thereupon, the transport rollers are turned back in the opposite direction by means of the drive motor 12, so that the thread end is now introduced into the spinneret 2.
  • the casing 5 is formed uniformly like the radial side of the air-blowing nozzle 7, ie it is also prismatic or is provided with a circular-cylindrical rounding 33. This ensures that the air injection nozzle is positioned clearly and positively with respect to the spinneret 2, and at the same time the suction effect of the blown air flow is reduced as little as possible.

Abstract

What is presented is a new coupling body (1) which has a blowing nozzle (7) and transport rollers (8), the blowing nozzle (7) possessing a slit-shaped recess (22) which is open on a radial side and the inner wall (25) of which is partially circular-cylindrical in the longitudinal direction and, in the coupled state, is aligned with the longitudinal bore of the spinning nozzle (2). A compressed-air channel (23) opens into the recess (22) in such a way that the blown-in air stream is oriented axially with the spinning nozzle (2). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Rückführung eines Fadenendes nach dem Oberbegriff des Patentanspruchs 1 und eine Ummantelung für eine Spinndüse zum Andocken einer solchen Vorrichtung.The invention relates to a device for returning a thread end according to the preamble of claim 1 and a casing for a spinneret for docking such a device.

Es ist aus dem japanischen Gebrauchsmuster 62-46666 bekannt, ein Andockelement vorzusehen mit einer Blasdüse und einem Transportrollenpaar. Die Blasdüse besitzt einen Führungsbereich und einen Fadenduktus mit einem Blaselement, das hin und her beweglich auf den Führungsbereich einwirkend ausgebildet ist. Dieser Fadenduktus ist einseitig offen und bildet mit dem Führungsbereich einen geschlossenen Kanal in Längsrichtung. Das Blaselement führt über einen Kanal unter einem Winkel von ungefähr 45° in den Längskanal der Blasdüse. Es ist nun ein wesentlicher Nachteil der obengenannten Blasdüse, dass die Saugwirkung zu gering ist, um das Fadenende zuverlässig durch eine Spinndüse mit einem Längskanal geringeren Durchmessers durchzuführen.It is known from Japanese utility model 62-46666 to provide a docking element with a blowing nozzle and a pair of transport rollers. The blowing nozzle has a guide area and a thread style with a blowing element which is designed to act back and forth so as to act on the guide area. This thread style is open on one side and forms a closed channel in the longitudinal direction with the guide area. The blowing element leads through a channel at an angle of approximately 45 ° into the longitudinal channel of the blowing nozzle. It is now a major disadvantage of the above-mentioned blowing nozzle that the suction effect is too low to reliably carry out the thread end through a spinneret with a longitudinal channel of smaller diameter.

Die Erfindung stellt sich nun die Aufgabe, ein solches Rückführelement anzugeben, dass eine ausgezeichnete Saugwirkung auf das Fadenende hat und gleichzeitig das Fadenende zuverlässig durch einen engen und langen Spinndüsenkanal durchzuführen, auch wenn die Spinndüse zweiteilig ausgebildet ist aus einer Injektordüse und einer Dralldüse.The object of the invention is to provide such a return element that has an excellent suction effect on the thread end and at the same time reliably carry out the thread end through a narrow and long spinneret channel, even if the spinneret is formed in two parts from an injector nozzle and a swirl nozzle.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the features of patent claim 1.

Es ist eine weitere Aufgabe der Erfindung, eine Ummantelung einer Spinndüse anzugeben, die für eine erfindungsgemässe Vorrichtung nach Anspruch 1 zum Andocken besonders ausgebildet ist.It is a further object of the invention to provide a sheathing for a spinneret that is suitable for an inventive one Device according to claim 1 for docking is specially designed.

Es ist ein wesentlicher Vorteil der Erfindung, dass nunmehr die Blasluft axial in die Spinndüse eingeblasen werden kann. Ein weiterer Vorteil entsteht dadurch, dass eine grössere Saugwirkung auf das Fadenende ausgeübt wird, so dass das Fadenende zuverlässig in den Andockkörper eingesogen wird. Der axiale Blasluftstrom gewährleistet ebenfalls, dass das Fadenende zuverlässig und schnell durch die gesamte Spinndüse hindurchgeführt wird.It is an essential advantage of the invention that the blowing air can now be blown axially into the spinneret. Another advantage arises from the fact that a greater suction effect is exerted on the thread end, so that the thread end is reliably sucked into the docking body. The axial blowing air flow also ensures that the thread end is reliably and quickly passed through the entire spinneret.

Weitere Vorteile der Erfindung folgen aus der nachstehenden Beschreibung. Dort wird die Erfindung anhand eines in den Zeichnungen dargestellten Beispieles näher erläutert. Es zeigt:

Fig. 1
eine prinzipielle Anordnung eines erfindungsgemässen Andockelementes mit einer Spinndüse in der Vorbereitungsphase zum Andocken,
Fig. 2
dieselbe Anordnung wie in Fig. 1 im angedockten Zustand,
Fig. 3
die Lufteinblasdüse in verschiedenen Ansichten, und
Fig. 4
eine Obenansicht des angedockten Andockkörpers in der Ummantelung der Spinndüse.
Further advantages of the invention follow from the description below. There, the invention is explained in more detail using an example shown in the drawings. It shows:
Fig. 1
a basic arrangement of a docking element according to the invention with a spinneret in the preparation phase for docking,
Fig. 2
the same arrangement as in Fig. 1 in the docked state,
Fig. 3
the air injection nozzle in different views, and
Fig. 4
a top view of the docked docking body in the casing of the spinneret.

In Fig. 1 ist ein Andockkörper 1 schematisch dargestellt mit einer Spinndüse 2, die aus einer Injektordüse 3 und einer Dralldüse 4 besteht. Eine nur teilweise dargestellte Ummantelung 5 ummantelt die Spinndüse nach oben erstreckend. In dieser Ummantelung 5 sind Luftabsaugkanäle vorgesehen, die hier nicht weiter dargestellt sind. Der Andockkörper 1 ist zusammen mit einem Speicher 21 auf einem an sich bekannten Bedienungswagen zur Wartung der Spinnstellen einer Spinnmaschine befestigt, und besteht aus einem Gehäuse 6, auf dem eine Luftblasdüse 7 unterhalb einem Transportrollenpaar 8 angeordnet ist. Eine der Transportrollen 8 ist über einer Antriebswelle 10 und einer Kupplung 11 mit einem Antriebsmotor 12 verbunden. Die andere Transportrolle 8 ist federnd gegen die eine angepresst angeordnet und lässt sich davon wegklappen. Ein bloss schematisch dargestellter Fadenführer 9 ist oberhalb der Transportrollen 8 angeordnet. Das gesamte Gehäuse ist auf Führungsrollen 13 auf einem Schienenelement 14 längsbeweglich. Das Schienenelement 14 ist in üblicher Weise auf dem nicht-dargestellten Gestell des Bedienungswagen befestigt. In der Figur am rechten Ende des Schienenelementes 14, ist eine nach unten abgestufte Kulisse 15 vorgesehen, deren Funktion in bezug auf Fig. 2 beschrieben wird. Für die Längsbewegung ist ein Kolben 16 in einem langen Zylinder 17 vorgesehen, der eine Stange 18 hin und her bewegen lässt. Die Stange 18 ist über eine Gelenkverbindung 19 mit dem Gehäuse 6 verbunden. Somit lässt sich das Gehäuse auf den Transportrollen 13 hin und her bewegen. Es versteht sich, dass aber auch andere Antriebe für das fahrbare Gehäuse 6 vorgesehen sein können. Das Fadenende des strichpunktiert dargestellten Fadens 20 wird nun von einer nicht dargestellten Aufspuleinheit mit einer Saugdüse gesucht und über den mit einem Haken versehenen Fadenführer 9 zwischen die Transportrollen 8 eingeführt und vor dem Eingang der Luftblasdüse 7 gebracht. Die Spule wird in bekannter Weise mit einer Reibwalze zurückgedreht, wobei der Fadenüberschuss in dem Speicher 21 gespeichert wird. Sobald nun das Fadenende zwischen den abgehobenen Transportrollen 8 hindurchgeführt worden ist, werden die Rollen 8 zueinandergebracht und klemmen so das Fadenende ein. Nun wird das Gehäuse 6 in die Andockposition gefahren, die aus Fig. 2 ersichtlich ist. Bei der Bewegung von der Einfädelposition (Fig. 1) zu der Andockposition (Fig. 2) liegt das Gehäuse in einem leichten schrägen Winkel zum Schienenelement 14 auf, so dass die Blasdüse und die Transportrollen 8 zunächst etwas oberhalb der Spinndüse in der Ummantelung 5 eintreffen. Sobald jedoch die Kulisse 15 von der vorderen Transportrolle 13 erreicht wird, setzt die Luftblasdüse 7 plan auf die Spinndüse 2 auf, so dass eine perfekte Dichtung durch das Eigengewicht des Andockkörpers erreicht wird. Es versteht sich, dass die Kulisse 15 auch so ausgebildet sein kann, dass die vordere Führungsrolle 13 ständig vom Schienenelement 14 geführt ist.In Fig. 1, a docking body 1 is shown schematically with a spinneret 2, which consists of an injector 3 and a swirl nozzle 4. A sheath 5, only partially shown, sheaths the spinneret extending upwards. In this casing 5 air extraction channels are provided, which are not shown here. The docking body 1 is together with a memory 21 on a known per se Operating trolley attached to the maintenance of the spinning positions of a spinning machine, and consists of a housing 6, on which an air blowing nozzle 7 is arranged below a pair of transport rollers 8. One of the transport rollers 8 is connected to a drive motor 12 via a drive shaft 10 and a clutch 11. The other transport roller 8 is resiliently pressed against one and can be folded away from it. A thread guide 9, shown merely schematically, is arranged above the transport rollers 8. The entire housing is longitudinally movable on guide rollers 13 on a rail element 14. The rail element 14 is fastened in a conventional manner on the frame of the service trolley, not shown. In the figure at the right end of the rail element 14, a downwardly stepped link 15 is provided, the function of which will be described with reference to FIG. 2. For the longitudinal movement, a piston 16 is provided in a long cylinder 17, which allows a rod 18 to move back and forth. The rod 18 is connected to the housing 6 via an articulated connection 19. The housing can thus be moved back and forth on the transport rollers 13. It goes without saying that other drives can also be provided for the mobile housing 6. The thread end of the thread 20 shown in broken lines is now sought by a winding unit (not shown) with a suction nozzle and is inserted between the transport rollers 8 via the thread guide 9 provided with a hook and brought in front of the inlet of the air blowing nozzle 7. The bobbin is rotated back in a known manner with a friction roller, the excess thread being stored in the memory 21. As soon as the thread end has been passed between the lifted transport rollers 8, the rollers 8 are brought together and thus clamp the thread end. Now the housing 6 is moved into the docking position, which can be seen in FIG. 2. When moving from the threading position (Fig. 1) to the docking position (Fig. 2), the housing lies at a slight oblique angle to the rail element 14, so that the blowing nozzle and the transport rollers 8 initially slightly above that Arrive the spinneret in the casing 5. However, as soon as the backdrop 15 is reached by the front transport roller 13, the air blowing nozzle 7 is placed flat on the spinneret 2, so that a perfect seal is achieved by the weight of the docking body. It goes without saying that the link 15 can also be designed such that the front guide roller 13 is constantly guided by the rail element 14.

Fig. 3 zeigt nun die Luftblasdüse 7 in weiteren Einzelheiten. In Fig. 3d ist die Luftblasdüse 7 im Längsschnitt dargestellt und sind die verschiedenen Ansichten der Luftblasdüse 7 angegeben, wobei Fig. 3a die Ansicht in Richtung A darstellt (Obenansicht), Fig 3b die Ansicht in Richtung B (Untenansicht) und Fig. 3c die Ansicht in Richtung C (Seitenansicht) darstellt. Die Luftblasdüse 7 weist nun einen Schlitz oder eine schlitzförmige Ausnehmung 22 auf, die von oben mit einem labyrinthartigen Druckluftkanal 23 verbunden ist. Dazu sind senkrecht zueinander angebrachte Bohrungen im Körper der Luftblasdüse 7 gebildet, die mit einem Stift 24a oder 24b jeweils abgeschlossen sind, sodass ein durchgehender Kanal 23 entsteht. Der Schlitz 22 ist innen mit einer kreiszylinderförmigen Wandung 25 versehen und nach oben hin längs der Spinnachse sacklochartig ausgebildet. Der Druckluftkanal 23 ist über einer Blasöffnung 26 geringeren Durchmessers mit dem Schlitz 22 verbunden. Die Blasöffnung 26 und die kreiszylinderförmige Wandung 25 sind genau in der Spinnachse 27 gebildet. Seitlich dieser Blasöffnung 26 ist ein trichterförmiger Einlauf 28 vorgesehen, dessen Trichterachse einen spitzen Winkel 30 mit der Spinnachse bildet. Dieser Winkel 30 liegt im Bereich von 15° - 45°, vorzugsweise um 30°. Unterhalb der Lufteinblasdüse 7 ist im Bereich des Schlitzes 22 eine grössere Ausnehmung 31 vorgesehen, die mit einer Nut 32, welche schmaler und weniger breit als die Ausnehmung 31 gebildet ist, verbunden ist. Wie aus den Fig. 3a und 3b ersichtlich, ist die dem Schlitz 22 zugeordnete Seite 33 prismatisch oder zylinderförmig abgerundet. Insbesondere kann die zugeordnete Seite 33 Teil eines Prismas mit der Grundfläche eines regelmässigen n-Ecks (z.B. 6-Ecks) bilden. Im dargestellten Beispiel hat die zugeordnete Seite 33 die Form eines Kreiszylinders. Die Ausnehmung 31 und die Nut 32 verhindern nun, dass ein Luftpolster zwischen der Lufteinblasdüse 7 und der Spinndüse 2, auf dem die Luftblasdüse 7 aufgesetzt worden ist, entstehen kann. Die Nut 32 ist ferner so gering gestaltet, dass nur wenig Luft entweichen kann und der grösste Teil der Blasluft durch die Spinndüse geführt wird. Am Ende der Nut 32 ist ein fest angeordnetes Messer 34 oder auch bloss eine scharfe Kante an der Luftblasdüse 7 vorgesehen, um das Fadenende abzuschneiden.Fig. 3 now shows the air blowing nozzle 7 in more detail. In Fig. 3d the air blowing nozzle 7 is shown in longitudinal section and the various views of the air blowing nozzle 7 are given, Fig. 3a shows the view in direction A (top view), Fig 3b shows the view in direction B (bottom view) and Fig. 3c the View in direction C (side view). The air blowing nozzle 7 now has a slot or a slot-shaped recess 22 which is connected from above to a labyrinth-like compressed air channel 23. For this purpose, holes are made in the body of the air-blowing nozzle 7 which are perpendicular to each other and are each closed off with a pin 24a or 24b, so that a continuous channel 23 is created. The slot 22 is provided on the inside with a circular cylindrical wall 25 and is formed like a blind hole upwards along the spinning axis. The compressed air channel 23 is connected to the slot 22 via a blowing opening 26 of smaller diameter. The blowing opening 26 and the circular-cylindrical wall 25 are formed exactly in the spinning axis 27. A funnel-shaped inlet 28 is provided to the side of this blowing opening 26, the funnel axis of which forms an acute angle 30 with the spinning axis. This angle 30 is in the range from 15 ° to 45 °, preferably around 30 °. Below the air injection nozzle 7, a larger recess 31 is provided in the area of the slot 22, which is connected to a groove 32 which is narrower and less wide than the recess 31. As can be seen from FIGS. 3a and 3b, the side 33 assigned to the slot 22 is rounded in a prismatic or cylindrical manner. In particular, the assigned side 33 form part of a prism with the base of a regular n-corner (eg 6-corner). In the example shown, the assigned side 33 has the shape of a circular cylinder. The recess 31 and the groove 32 now prevent an air cushion from being formed between the air injection nozzle 7 and the spinneret 2, on which the air blowing nozzle 7 has been placed. The groove 32 is also designed so small that only a little air can escape and most of the blown air is passed through the spinneret. At the end of the groove 32 there is a fixedly arranged knife 34 or merely a sharp edge on the air blowing nozzle 7 in order to cut off the thread end.

Der genaue Funktionsablauf des Rückführens ist nun wie folgt: Das Fadenende wird, wie oben beschrieben, zwischen die Transportrollen eingefädelt, wobei das Fadenende in die Nut 32 geführt und mittels des Messers 34 oder der scharfen Kante abgeschnitten wird. Das gesamte Gehäuse wird in die Andockposition gefahren (Fig. 2). Dann wird die Druckluft der Luftblasdüse eingeschaltet, so dass das Fadenende in die Düse eingeblasen wird. Daraufhin werden die Transportwalzen mittels des Antriebsmotors 12 in Gegenrichtung zurückgedreht, so dass das Fadenende nun in die Spinndüse 2 hineingeführt wird. Sobald das Fadenende auf der anderen Seite der Spinndüse 2 erfasst worden ist - wie bspw. in dem schweizerischen Patentgesuch 04 550/89 beschrieben - wird die Druckluft der Luftblasdüse abgeschaltet und werden die Transportrollen 8 voneinander wegbewegt, so dass der Andockkörper 1 weggefahren werden kann in die Einfädelposition.The exact functional sequence of the return is now as follows: The thread end is threaded, as described above, between the transport rollers, the thread end being guided into the groove 32 and cut off by means of the knife 34 or the sharp edge. The entire housing is moved into the docking position (Fig. 2). Then the compressed air of the air blowing nozzle is switched on, so that the thread end is blown into the nozzle. Thereupon, the transport rollers are turned back in the opposite direction by means of the drive motor 12, so that the thread end is now introduced into the spinneret 2. As soon as the thread end on the other side of the spinneret 2 has been grasped - as described, for example, in Swiss patent application 04 550/89 - the compressed air of the air blowing nozzle is switched off and the transport rollers 8 are moved away from one another so that the docking body 1 can be moved away the threading position.

Wie aus Fig. 4 ersichtlich, ist die Ummantelung 5 gleichförmig ausgebildet wie die radiale Seite der Luftblasdüse 7, d.h. sie ist ebenfalls prismatisch ausgebildet oder mit einer kreiszylinderförmigen Abrundung 33 versehen. Dies gewährleistet, dass die Lufteinblasdüse eindeutig und formschlüssig bezüglich der Spinndüse 2 positioniert wird, und gleichzeitig die Saugwirkung des Blasluftstroms so wenig wie möglich verringert wird.As can be seen from FIG. 4, the casing 5 is formed uniformly like the radial side of the air-blowing nozzle 7, ie it is also prismatic or is provided with a circular-cylindrical rounding 33. This ensures that the air injection nozzle is positioned clearly and positively with respect to the spinneret 2, and at the same time the suction effect of the blown air flow is reduced as little as possible.

BezeichnungslisteLabel list

11
AndockkörperDocking body
22nd
Falschdrall-DüsenspinneinheitFalse twist nozzle spinning unit
33rd
InjektordüseInjector nozzle
44th
DralldüseSwirl nozzle
55
UmmantelungSheathing
66
Gehäusecasing
77
LufteinblasdüseAir injection nozzle
88th
Rollenpaar, TransportrollenPair of rollers, transport rollers
99
FadenführerThread guide
1010th
Antriebswelledrive shaft
1111
Kupplungclutch
1212th
AntriebsmotorDrive motor
1313
FührungsrollenLeadership roles
1414
SchienenelementRail element
1515
Abstufung, KulisseGradation, backdrop
1616
Kolbenpiston
1717th
Zylindercylinder
1818th
Stangepole
1919th
GelenkverbindungArticulated connection
2020th
Fadenthread
2121
FadenspeicherThread storage
2222
Schlitzslot
2323
DruckluftkanalCompressed air duct
24a,24b24a, 24b
Stiftpen
2525th
kreiszylinderförmige Wandungcircular cylindrical wall
2626
BlasöffnungBlow opening
2727
SpinnachseSpinning axis
2828
trichterförmiger Einlauffunnel-shaped inlet
2929
TrichterachseFunnel axis
3030th
spitzer Winkelacute angle
3131
AusnehmungRecess
3232
NutGroove
3333
kreiszylinderförmige Abrundungcircular cylindrical rounding

Claims (10)

  1. An apparatus for guiding back a yarn end from a winder unit by a spinning nozzle (2) of a false twist air spinning unit, comprising a docking body (1) with an air-jet nozzle (7) for forming an air stream in the opposite direction in the spinning nozzle (2) and a pair of rollers (8) for turning back the yarn (20) through the spinning nozzle (2) as well as a device for displacing the docking body (1), characterized in that the air-jet nozzle (7) is provided with a slot-like recess (22) which is open towards one radial side, with the inner side (25) having a partially circular-cylindrical shape in the longitudinal direction and being arranged in the docked condition in true alignment with the longitudinal bore of the spinning nozzle (2), and that a compressed air duct (23) opens out into the recess (22) in such a way that the injected air stream is aligned axially with the spinning nozzle (2).
  2. An apparatus as claimed in claim 1, characterized in that the docking body (1) is arranged externally in a prismatic or cylindrical shape on the radial side (33) with the slot-like recess (22).
  3. An apparatus as claimed in claim 1 or 2, characterized in that the circular-cylindrical part of the recess (22) is arranged upwardly, as seen in the direction of the yarn course, in a pocket-hole-like manner and that the compressed air duct (23) opens out into the pocket-hole-like end of the recess (22).
  4. An apparatus as claimed in claim 3, characterized in that a funnel-like inlet (28) is provided in the recess, whose axis (29) forms an acute angle (30) with the axis of the recess (22).
  5. An apparatus as claimed in one of the claims 1 to 4, characterized in that the lower side of the docking body (19 is arranged with a groove (32) which extends from the outlet of the recess (22) to the edge of the docking body (1).
  6. An apparatus as claimed in one of the previous claims, characterized in that the device for displacing the docking body (1) is provided with guide rollers (8) with a rail element (14) arranged on the frame of the operating carriage, so that the docking body (1) can be brought longitudinally movably into the docked condition transversal to the direction of the yarn course.
  7. An apparatus as claimed in claim 6, characterized in that the device is longitudinally movable by means of a hydraulically or pneumatically powered piston (16).
  8. An apparatus as claimed in claim 6 or 7, characterized in that the guide rollers (8) are rotatably attached to the docking body (1) in such a way that the docking body (1) is longitudinally movable on the rail element (14) in a slightly inclined position.
  9. An apparatus as claimed in claim 8, characterized in that the rail element (14) is slightly stepped at the end (15) showing towards the spinning nozzle (2), so that the docking body rests in a plane manner on the spinning nozzle (2) in the docked condition.
  10. An encasing (5) for at least one spinning nozzle (2) of a false twist air spinning unit and for docking on an apparatus as claimed in one of the previous claims, characterized in that it extends above the spinning nozzle and it is arranged in said upper zone evenly encompassing the radial side (33) of the air jet nozzle (7) of the docking body (1).
EP91122068A 1991-01-04 1991-12-21 Device for guiding back a yarn end and a cover for, at least, one spinning nozzle Expired - Lifetime EP0493768B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1691 1991-01-04
CH16/91 1991-01-04

Publications (2)

Publication Number Publication Date
EP0493768A1 EP0493768A1 (en) 1992-07-08
EP0493768B1 true EP0493768B1 (en) 1994-11-30

Family

ID=4177490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91122068A Expired - Lifetime EP0493768B1 (en) 1991-01-04 1991-12-21 Device for guiding back a yarn end and a cover for, at least, one spinning nozzle

Country Status (5)

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US (1) US5379581A (en)
EP (1) EP0493768B1 (en)
JP (1) JP3291586B2 (en)
AT (1) ATE114744T1 (en)
DE (1) DE59103690D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017124989A1 (en) * 2017-10-25 2019-04-25 Maschinenfabrik Rieter Ag Yarn return unit for returning a yarn and workstation of a textile machine with a yarn return unit
CN111137742B (en) * 2019-12-30 2021-05-11 福建省和达智能科技有限公司 Looping mechanism with head and tail chamfering mechanism for computerized flat knitting machine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2361787C3 (en) * 1973-12-12 1981-05-27 Stahlecker, Fritz, 7347 Bad Überkingen Device for piecing which can be moved along an open-end spinning machine
US4114356A (en) * 1976-08-05 1978-09-19 Zinser Textilmaschinen Gmbh Open-end spinning apparatus
JPS5930922A (en) * 1982-08-12 1984-02-18 Toyoda Autom Loom Works Ltd Ending in open end fine spinning frame
JPS5966527A (en) * 1982-10-07 1984-04-16 Toyoda Autom Loom Works Ltd Yarn ending in bundle-binding spinning machine
US4545193A (en) * 1983-04-15 1985-10-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method for piecing fasciated yarn
DE3316108A1 (en) * 1983-05-03 1984-11-08 Zinser Textilmaschinen Gmbh, 7333 Ebersbach BLOW-OFF NOZZLE
DE3325928A1 (en) * 1983-07-19 1985-01-31 Fritz 7347 Bad Überkingen Stahlecker METHOD AND DEVICE FOR SPINNING A YARN ON A SPINNING UNIT OF AN OE-FRICTION SPINNING MACHINE
DE3564296D1 (en) * 1984-05-19 1988-09-15 Schubert & Salzer Maschinen Method and device for performing the piecing operation in an open-end spinning machine
JPS624666A (en) * 1985-07-02 1987-01-10 Nissan Motor Co Ltd Antilock apparatus
DE3744758A1 (en) * 1987-03-02 1988-12-29 Schubert & Salzer Maschinen Method and device for the piecing of a spinning apparatus working with a pneumatic twisting member
DE3831637A1 (en) * 1988-09-17 1990-04-05 Schlafhorst & Co W AGGREGATE FROM A OE SPINNING MACHINE AND A CAN CHANGING DEVICE
JP2911593B2 (en) * 1989-12-19 1999-06-23 マシーネンフアブリーク・リーテル・アクチエンゲゼルシヤフト Equipment for threading through openings in textile machinery

Also Published As

Publication number Publication date
JPH04303366A (en) 1992-10-27
ATE114744T1 (en) 1994-12-15
US5379581A (en) 1995-01-10
EP0493768A1 (en) 1992-07-08
DE59103690D1 (en) 1995-01-12
JP3291586B2 (en) 2002-06-10

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