EP0433832A1 - Device for threading a thread through the opening of a textile machine - Google Patents

Device for threading a thread through the opening of a textile machine Download PDF

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Publication number
EP0433832A1
EP0433832A1 EP90123714A EP90123714A EP0433832A1 EP 0433832 A1 EP0433832 A1 EP 0433832A1 EP 90123714 A EP90123714 A EP 90123714A EP 90123714 A EP90123714 A EP 90123714A EP 0433832 A1 EP0433832 A1 EP 0433832A1
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EP
European Patent Office
Prior art keywords
docking body
thread
bore
groove
opening
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
EP90123714A
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German (de)
French (fr)
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EP0433832B1 (en
Inventor
Walter Slavik
Reto Braunschweiler
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication date
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Publication of EP0433832A1 publication Critical patent/EP0433832A1/en
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01HSPINNING OR TWISTING
    • D01H15/00Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/002Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for false-twisting spinning machines

Definitions

  • a device according to the preamble of claim 1 is also known from Japanese published application No. 62-46666.
  • a two-part docking body has an axially continuous, slightly conical bore for receiving the thread to be attached and a bore which opens into this bore and is strongly inclined to the axis of the bore. If compressed air is blown through the inclined hole, the thread is sucked through the conical hole and transported further. When the thread is threaded, the docking body is separated into its two parts so that it can be removed from the attached thread.
  • reliable threading cannot be achieved according to this proposal, in particular not by means of air swirl nozzles with a relatively narrow and long, stepped axial through hole.
  • the present invention is based on the object of developing a device according to the preamble of claim 1 in such a way that a thread can be reliably threaded through a relatively narrow opening, which is also of complex design. This object is achieved by the characterizing features of claim 1.
  • the design according to the invention ensures that the docking body can be centered precisely relative to the opening without affecting the positioning accuracy of the device carrying the docking body, e.g. of the operating machine, excessive demands must be made.
  • the radially open groove is also closed, so that the docking body can be formed in one piece, which simplifies its construction and its manipulation.
  • This centering engagement also enables the axially parallel arrangement of the compressed air hole. As a result, the air flow transporting the thread is hardly swirled. The thread can therefore be reliably threaded over longer distances and above all through tighter holes in the opening, in particular through complicatedly shaped air swirl nozzles.
  • FIG. 1 to 3 schematically show an air swirl nozzle 1 of a spinning machine and a device 2 according to the invention, which is mounted on an automatic control device.
  • the machine operates a whole range of spinning units and for this purpose can be moved along the row of spinning units. From the rest of the machine, only a console 3 is indicated, on which the device 2 is mounted.
  • the air vortex nozzle 1 has a continuous, stepped, axial bore 5. Tangential bores 7 open into the bore 5 in two radial planes and inclined eccentrically to the axis 6 of the air vortex nozzle 1 gives a false twist.
  • the bore 5 has a conical extension 8 at its upper, axial end.
  • the device 2 comprises two arms 10, 11 pivotably mounted on the bracket 3 and a bracket 12 articulated at the free end of the arms 10, 11.
  • the bracket 3, arms 10, 11 and bracket 12 form a quadrilateral joint, which is separated by a pneumatic cylinder 13 from the 1 is pivoted into the working position shown in Fig. 2.
  • a housing 14 which is open at the bottom is fastened to the carrier 12.
  • a further carrier 15 can be displaced in the housing 14 along a guide rail 16.
  • the carrier 15 can be moved by a further pneumatic cylinder 17 between the raised basic position shown in FIG. 1 and a lowered working position shown in FIG. 2.
  • An electric motor 20 with an output shaft 21 is mounted on the carrier 15.
  • a gear wheel 22 sits on the shaft 21.
  • a proximity switch 23 is mounted adjacent to the gear ring of the gear wheel 22, the output of which is connected via a line 24 to a counter (not shown).
  • a roller 25 is seated on the free end of the shaft 21.
  • a second roller 26, which is freely rotatably mounted, is pressed against the roller 25.
  • the rollers 25, 26 are tapered spherically at their end facing away from the motor 20.
  • a docking element 30 is attached to the carrier 15, consisting of an arm 31 projecting from the carrier 15 and a one-piece pin 32 projecting downward from the arm 31.
  • the cone angle of this lateral surface 33 is equal to the opening angle the conical extension 8.
  • the pin 32 has an axially continuous, radially open groove 34 with parallel side walls.
  • the central plane of the groove 34 coincides with the common tangential plane of the rollers 25, 26 through their line of contact (FIG. 3) and is parallel, but eccentric to the axis 35 of the pin 32, which in the working position (FIG. 2) with the axis 6 coincides.
  • the pin 32 has a bore 36 which opens onto the lower end face 37 of the pin 32.
  • the bore 36 communicates with a transverse bore 38 of larger diameter, which in turn is connected to a compressed air source via a valve, not shown.
  • the bore 36 is slightly inclined relative to the pin axis 35 such that it points into the center of the narrowest point of the bore 5 of the air swirl nozzle 1 in the working position of the device 2.
  • the housing 14 In the common tangential plane of the rollers 25, 26 through their line of contact, the housing 14 has a slot 39 which extends to approximately the depth of the bottom of the groove 34.
  • the device shown works as follows: If a thread break is detected on a spinning unit, the automatic control system positions itself on the relevant spinning unit.
  • the device 2 is in the basic position according to FIG. 1.
  • the automatic control unit lifts the bobbin from the drive roller and searches for the thread end with a suction nozzle, for example in the manner described in DE-OS 33 36 294.
  • the air supply to the tangential bores 7 of the air swirl nozzle 1 is interrupted.
  • a suction tube 45 of the automatic control unit takes over the separate thread end from the suction nozzle.
  • a sufficient length of thread 46 is unwound from the bobbin and stored in the suction tube 45.
  • the suction pipe 45 threads the thread 46 into the thread path above the air swirl nozzle 1.
  • the suction tube 45 introduces the thread 46 to be attached into the slot 39 of the housing 14, into the groove 34 of the pin 32 and into the clamping line of the pair of rollers 25, 26.
  • the thread 46 is stretched past the mouth 47 of a suction storage tube 48.
  • the motor 20 is now switched on, so that the pair of rollers 25, 26 rotates backwards and the thread 46 is withdrawn from the suction tube 45.
  • the thread 46 is drawn into the groove 34.
  • the thread 46 drawn from the suction pipe 45 is stored in a loop in the storage pipe 48. After a precisely defined number of revolutions, which is measured by the proximity switch 23 and the counter connected to it, the motor 20 is stopped and the thread end is cut off immediately below the end face 37.
  • the carrier 12 is positioned above the air swirl nozzle 1 by means of the cylinder 13.
  • the slotted housing 14 prevents the thread end in the groove 34 of the pin 32 from aligning with the suction arranged behind the air swirl nozzle 1.
  • the housing 14 strikes a stop 49 of the spinning unit so that the pin 32 is positioned exactly in one direction relative to the axis 6.
  • the carrier 15 is lowered by means of the cylinder 17.
  • the pin 32 moves into the extension 8 and is thereby positioned exactly in the second direction to the axis 6.
  • the compressed air for bore 36 and motor 20 are turned on.
  • the rollers 25, 26 return the thread 46 from the storage tube 48 through the air swirl nozzle 1.
  • the strength of the air flow must be selected so that no back pressure forms at the narrowest point of the air swirl nozzle 1 and the thread 46 is reliably transported through the air swirl nozzle 1 so that the suction of the air swirl nozzle 1 does not catch the thread.
  • the suction tube 45 has been positioned at the inlet end of the air swirl nozzle 1 above the pair of delivery rollers 50 of the drawing unit of the spinning unit, not shown.
  • the thread end emerges from the entry end of the air swirl nozzle 1, it is sucked into the suction pipe 45.
  • the carrier 15 is raised by means of the cylinder 17 and then the carrier 12 is returned to the basic position according to FIG. 1 by means of the cylinder 13. Due to the inclined pull resulting from this movement, the thread 46 is removed from the nip of the rotating pair of rollers 25, 26 extended.
  • suction tube 45 is positioned laterally offset below the pair of delivery rollers 50.
  • the operator control is now ready for the attachment process.
  • a precisely defined thread length is stored in the suction pipe 45, so that a defined overlap between the thread to be attached and the fiber sliver newly supplied by the drafting device is achieved during the piecing process.
  • the device 2 has been described in connection with threading the thread into an air swirl nozzle 1. However, it is generally applicable for threading threads through openings in textile machines. The advantages of the design according to the invention are particularly evident when it comes to relatively long, narrow openings.

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

Abstract

The device comprises a tenon-shaped one-part docking body (32) having a conical outer surface (33) for centring in a bore (5). The docking body (32) has an axially continuous radially open groove (34) and an approximately axis-parallel bore (36) which is connected to a compressed-air source and which opens out on the narrowed end face (37) of the docking body (32). This design ensures an operationally reliable threading even through narrow and long bores. The device is especially suitable for the threading of a thread through an air-vortex nozzle of an air-jet spinning machine. <IMAGE>

Description

Bei Luftspinnmaschinen z.B. gemäss DE-PS 33 36 294 muss zum Ansetzen eines Fadens im Bereich des Streckwerkes nach einem Fadenbruch oder nach einem Spulenwechsel der anzusetzende Faden bzw. ein Hilfsfaden von der Spule her rückwärts, das heisst entgegen der normalen Laufrichtung des Fadens, durch die Luftwirbeldüse eingefädelt werden. Angestrebt wird das Einfädeln durch einen Bedienungsautomaten, der eine ganze Reihe von Spinneinheiten bedient. Die DE-PS 33 36 294 schlägt dazu vor, an das Eintrittende der Luftwirbeldüse ein Saugrohr anzusetzen und das Fadenende damit durch die Luftwirbeldüse durchzusaugen. Dies gelingt allerdings nur bei einfachen Luftwirbeldüsen ohne Querschlitze. Ausserdem hat diese Art des Einfädelns des Fadens durch die Luftwirbeldüse den Nachteil, dass das Abzugwalzenpaar des Streckwerkes weit gespreizt werden muss, damit die Eingangsseite der Luftwirbeldüse zugänglich ist.In air spinning machines, for example according to DE-PS 33 36 294, in order to attach a thread in the area of the drafting system after a thread break or after a bobbin change, the thread to be attached or an auxiliary thread must be moved backwards from the bobbin, i.e. contrary to the normal running direction of the thread Air vortex nozzle to be threaded. The aim is to thread through an automatic operator that operates a whole range of spinning units. DE-PS 33 36 294 proposes to attach a suction pipe to the inlet end of the air swirl nozzle and thus suck the thread end through the air swirl nozzle. However, this is only possible with simple air swirl nozzles without cross slots. In addition, this type of threading the thread through the air vortex nozzle has the disadvantage that that the drafting roller pair of the drafting system must be spread wide so that the inlet side of the air swirl nozzle is accessible.

Aus der DE-OS 35 41 218 ist es bekannt, bei komplizierteren Luftwirbeldüsen mit Querschlitzen zusätzliche, rückwärts gerichtete Düsenöffnungen zum Durchsaugen des anzusetzenden Fadens vorzusehen. Diese zusätzlichen Düsen bedingen jedoch eine grössere Länge der Luftwirbeldüse und wirken beim Spinnen störend, so dass sie die Qualität des gesponnenen Garns nachteilig beeinflussen.From DE-OS 35 41 218 it is known to provide additional, rearward-directed nozzle openings for sucking through the thread to be applied in the case of more complicated air vortex nozzles with transverse slots. However, these additional nozzles require a longer length of the air vortex nozzle and have a disruptive effect when spinning, so that they adversely affect the quality of the spun yarn.

Aus der japanischen veröffentlichten Anmeldung Nr. 62-46666 ist ferner eine Vorrichtung gemäss Oberbegriff des Anspruchs 1 bekannt. Ein zweiteiliger Andockkörper hat eine axial durchgehende, leicht konische Bohrung zur Aufnahme des anzusetzenden Fadens sowie eine in diese Bohrung mündende, zur Bohrungsachse stark geneigte Bohrung. Wird durch die geneigte Bohrung Druckluft geblasen, dann wird der Faden durch die konische Bohrung durchgesaugt und weiter transportiert. Wenn der Faden eingefädelt ist, wird der Andockkörper in seine beiden Teile getrennt, so dass er vom angesetzten Faden entfernt werden kann. Es hat sich jedoch gezeigt, dass ein zuverlässiges Einfädeln nach diesem Vorschlag nicht erreicht werden kann, insbesondere nicht durch Luftwirbeldüsen mit einer relativ engen und langen, abgestuften axialen Durchgangsbohrung.A device according to the preamble of claim 1 is also known from Japanese published application No. 62-46666. A two-part docking body has an axially continuous, slightly conical bore for receiving the thread to be attached and a bore which opens into this bore and is strongly inclined to the axis of the bore. If compressed air is blown through the inclined hole, the thread is sucked through the conical hole and transported further. When the thread is threaded, the docking body is separated into its two parts so that it can be removed from the attached thread. However, it has been shown that reliable threading cannot be achieved according to this proposal, in particular not by means of air swirl nozzles with a relatively narrow and long, stepped axial through hole.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung gemäss Oberbegriff des Anspruchs 1 derart weiterzubilden, dass ein Faden zuverlässig durch eine auch kompliziert ausgebildete relativ enge Oeffnung eingefädelt werden kann. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The present invention is based on the object of developing a device according to the preamble of claim 1 in such a way that a thread can be reliably threaded through a relatively narrow opening, which is also of complex design. This object is achieved by the characterizing features of claim 1.

Durch die erfindungsgemässe Ausbildung wird erreicht, dass der Andockkörper relativ zur Oeffnung präzis zentriert werden kann, ohne dass an die Positionierungsgenauigkeit des den Andockkörper tragenden Gerätes, z.B. des Bedienungsautomaten, übermässig hohe Anforderungen gestellt werden müssen. Durch den zentrierenden Eingriff mit der Oeffnung wird ausserdem die radial offene Nut geschlossen, so dass der Andockkörper einteilig ausgebildet werden kann, was seinen Aufbau und seine Manipulation vereinfacht. Durch diesen zentrierenden Eingriff wird ausserdem die achsparallele Anordnung der Druckluftbohrung ermöglicht. Dadurch ist der den Faden transportierende Luftstrom kaum verwirbelt. Der Faden kann daher über längere Strecken und vor allem durch engere Bohrungen der Oeffnung, insbesondere durch kompliziert geformte Luftwirbeldüsen, zuverlässig eingefädelt werden.The design according to the invention ensures that the docking body can be centered precisely relative to the opening without affecting the positioning accuracy of the device carrying the docking body, e.g. of the operating machine, excessive demands must be made. By means of the centering engagement with the opening, the radially open groove is also closed, so that the docking body can be formed in one piece, which simplifies its construction and its manipulation. This centering engagement also enables the axially parallel arrangement of the compressed air hole. As a result, the air flow transporting the thread is hardly swirled. The thread can therefore be reliably threaded over longer distances and above all through tighter holes in the opening, in particular through complicatedly shaped air swirl nozzles.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Darin zeigt:

  • Fig. 1 einen schematischen Querschnitt durch eine erfindungsgemässe Vorrichtung in der Grundstellung,
  • Fig. 2 die Vorrichtung nach Fig. 1 in der Arbeitsstellung,
  • Fig. 3 einen Schnitt längs der Linie III-III in Fig. 2 in vereinfachter Darstellung, und
  • Fig. 4 einen Schnitt längs der Linie IV-IV in Fig. 3.
An exemplary embodiment of the invention is explained below with reference to the drawing. It shows:
  • 1 shows a schematic cross section through a device according to the invention in the basic position,
  • 2 shows the device according to FIG. 1 in the working position,
  • Fig. 3 is a section along the line III-III in Fig. 2 in a simplified representation, and
  • 4 shows a section along the line IV-IV in FIG. 3rd

In den Figuren 1 bis 3 ist schematisch eine Luftwirbeldüse 1 einer Spinnmaschine und eine erfindungsgemässe Vorrichtung 2 dargestellt, welche an einem Bedienungsautomaten montiert ist. Der Automat bedient eine ganze Reihe von Spinneinheiten und ist zu diesem Zweck längs der Reihe von Spinneinheiten fahrbar. Vom Rest des Automaten ist lediglich eine Konsole 3 angedeutet, auf welcher die Vorrichtung 2 montiert ist.1 to 3 schematically show an air swirl nozzle 1 of a spinning machine and a device 2 according to the invention, which is mounted on an automatic control device. The machine operates a whole range of spinning units and for this purpose can be moved along the row of spinning units. From the rest of the machine, only a console 3 is indicated, on which the device 2 is mounted.

Die Luftwirbeldüse 1 hat eine durchgehende, abgestufte, axiale Bohrung 5. In zwei Radialebenen münden in die Bohrung 5 geneigt und exzentrisch zur Achse 6 der Luftwirbeldüse 1 Tangentialbohrungen 7. Im Betrieb bewirken diese Tangentialbohrungen 7 in der Bohrung 5 zwei rotierende Luftströmungen, welche dem Faden einen Falschdrall verleiht. Die Bohrung 5 hat an ihrem oberen, axialen Ende eine konische Erweiterung 8. Die Vorrichtung 2 umfasst zwei auf der Konsole 3 schwenkbar gelagerte Arme 10, 11 und einen am freien Ende der Arme 10, 11 angelenkten Träger 12. Konsole 3, Arme 10, 11 und Träger 12 bilden ein Gelenkviereck, welches durch einen Pneumatikzylinder 13 aus der in Fig. 1 dargestellten Grundstellung in die in Fig. 2 dargestellte Arbeitsstellung geschwenkt wird. Am Träger 12 ist ein nach unten offenes Gehäuse 14 befestigt. Im Gehäuse 14 ist ein weiterer Träger 15 längs einer Führungsschiene 16 verschiebbar. Der Träger 15 kann durch einen weiteren Pneumatikzylinder 17 zwischen der in Fig. 1 dargestellten, angehobenen Grundstellung und einer in Fig. 2 gezeigten, abgesenkten Arbeitsstellung verschoben werden. Auf dem Träger 15 ist ein Elektromotor 20 mit einer Abtriebswelle 21 montiert. Auf der Welle 21 sitzt ein Zahnrad 22. Benachbart dem Zahnkranz des Zahnrades 22 ist ein Näherungsschalter 23 montiert, dessen Ausgang über eine Leitung 24 mit einem nicht dargestellten Zähler verbunden ist. Auf dem freien Ende der Welle 21 sitzt eine Rolle 25. Eine zweite, frei drehbar gelagerte Rolle 26 ist gegen die Rolle 25 angepresst. Die Rollen 25, 26 sind an ihrem dem Motor 20 abgewandten Ende ballig verjüngt. Unterhalb des Rollenpaares 25, 26 ist am Träger 15 ein Andockelement 30 befestigt, bestehend aus einem vom Träger 15 abstehenden Arm 31 und einem vom Arm 31 nach unten ragenden, einteiligen Zapfen 32. Der Zapfen 32 hat eine nach unten verjüngte, kegelförmige Mantelfläche 33. Der Konuswinkel dieser Mantelfläche 33 ist gleich dem Oeffnungswinkel der konischen Erweiterung 8. Der Zapfen 32 hat eine axial durchgehende, radial offene Nut 34 mit parallelen Seitenwänden. Die Mittelebene der Nut 34 fällt mit der gemeinsamen Tangentialebene der Rollen 25, 26 durch ihre Berührungslinie zusammen (Fig. 3) und ist parallel, aber exzentrisch zur Achse 35 des Zapfens 32, welche in der Arbeitsstellung (Fig. 2) mit der Achse 6 zusammenfällt. Neben der Nut 34 hat der Zapfen 32 eine Bohrung 36, die an der unteren Stirnfläche 37 des Zapfens 32 mündet. Die Bohrung 36 kommuniziert mit einer Querbohrung 38 grösseren Durchmessers, die ihrerseits über ein nicht dargestelltes Ventil mit einer Druckluftquelle verbunden ist. Die Bohrung 36 ist gegenüber der Zapfenachse 35 geringfügig derart geneigt, dass sie in der Arbeitsstellung der Vorrichtung 2 ins Zentrum der engsten Stelle der Bohrung 5 der Luftwirbeldüse 1 weist. In der gemeinsamen Tangentialebene der Rollen 25, 26 durch ihre Berührungslinie hat das Gehäuse 14 einen Schlitz 39, der sich bis etwa auf die Tiefe des Grundes der Nut 34 erstreckt.The air vortex nozzle 1 has a continuous, stepped, axial bore 5. Tangential bores 7 open into the bore 5 in two radial planes and inclined eccentrically to the axis 6 of the air vortex nozzle 1 gives a false twist. The bore 5 has a conical extension 8 at its upper, axial end. The device 2 comprises two arms 10, 11 pivotably mounted on the bracket 3 and a bracket 12 articulated at the free end of the arms 10, 11. The bracket 3, arms 10, 11 and bracket 12 form a quadrilateral joint, which is separated by a pneumatic cylinder 13 from the 1 is pivoted into the working position shown in Fig. 2. A housing 14 which is open at the bottom is fastened to the carrier 12. A further carrier 15 can be displaced in the housing 14 along a guide rail 16. The carrier 15 can be moved by a further pneumatic cylinder 17 between the raised basic position shown in FIG. 1 and a lowered working position shown in FIG. 2. An electric motor 20 with an output shaft 21 is mounted on the carrier 15. A gear wheel 22 sits on the shaft 21. A proximity switch 23 is mounted adjacent to the gear ring of the gear wheel 22, the output of which is connected via a line 24 to a counter (not shown). A roller 25 is seated on the free end of the shaft 21. A second roller 26, which is freely rotatably mounted, is pressed against the roller 25. The rollers 25, 26 are tapered spherically at their end facing away from the motor 20. Underneath the pair of rollers 25, 26, a docking element 30 is attached to the carrier 15, consisting of an arm 31 projecting from the carrier 15 and a one-piece pin 32 projecting downward from the arm 31. The cone angle of this lateral surface 33 is equal to the opening angle the conical extension 8. The pin 32 has an axially continuous, radially open groove 34 with parallel side walls. The central plane of the groove 34 coincides with the common tangential plane of the rollers 25, 26 through their line of contact (FIG. 3) and is parallel, but eccentric to the axis 35 of the pin 32, which in the working position (FIG. 2) with the axis 6 coincides. In addition to the groove 34, the pin 32 has a bore 36 which opens onto the lower end face 37 of the pin 32. The bore 36 communicates with a transverse bore 38 of larger diameter, which in turn is connected to a compressed air source via a valve, not shown. The bore 36 is slightly inclined relative to the pin axis 35 such that it points into the center of the narrowest point of the bore 5 of the air swirl nozzle 1 in the working position of the device 2. In the common tangential plane of the rollers 25, 26 through their line of contact, the housing 14 has a slot 39 which extends to approximately the depth of the bottom of the groove 34.

Im Betrieb arbeitet die dargestellte Vorrichtung wie folgt: Wenn an einer Spinneinheit ein Fadenbruch festgestellt wird, positioniert sich der Bedienungsautomat an der betreffenden Spinneinheit. Die Vorrichtung 2 ist in der Grundstellung nach Fig. 1. Der Bedienungsautomat hebt die Spule von der Antriebswalze ab und sucht das Fadenende mit einer Saugdüse, z.B. in der in DE-OS 33 36 294 beschriebenen Art. Die Luftzufuhr zu den Tangentialbohrungen 7 der Luftwirbeldüse 1 wird unterbrochen. Ein Saugrohr 45 des Bedienungsautomaten übernimmt das getrennte Fadenende von der Saugdüse. Von der Spule wird eine hinreichende Länge Faden 46 abgespult und im Saugrohr 45 gespeichert. Das Saugrohr 45 fädelt den Faden 46 in den Fadenlauf oberhalb der Luftwirbeldüse 1 ein. Nach dem Unterlegen unter die abgehobene Abzugsdruckwalze führt das Saugrohr 45 den anzusetzenden Faden 46 in den Schlitz 39 des Gehäuses 14, in die Nut 34 des Zapfens 32 und in die Klemmlinie des Rollenpaares 25, 26 ein. Der Faden 46 ist dabei an der Mündung 47 eines Saug-Speicherrohres 48 vorbeigespannt. Nun wird der Motor 20 eingeschaltet, so dass das Rollenpaar 25, 26 rückwärts dreht und der Faden 46 aus dem Saugrohr 45 zurückgezogen wird. Der Faden 46 wird dabei in die Nut 34 eingezogen. Der aus dem Saugrohr 45 abgezogene Faden 46 wird in einer Schlaufe im Speicherrohr 48 gespeichert. Nach einer genau definierten Anzahl Umdrehungen, welche durch den Näherungsschalter 23 und den daran angeschlossenen Zähler gemessen wird, wird der Motor 20 gestoppt und das Fadenende unmittelbar unterhalb der Stirnfläche 37 abgeschnitten.In operation, the device shown works as follows: If a thread break is detected on a spinning unit, the automatic control system positions itself on the relevant spinning unit. The device 2 is in the basic position according to FIG. 1. The automatic control unit lifts the bobbin from the drive roller and searches for the thread end with a suction nozzle, for example in the manner described in DE-OS 33 36 294. The air supply to the tangential bores 7 of the air swirl nozzle 1 is interrupted. A suction tube 45 of the automatic control unit takes over the separate thread end from the suction nozzle. A sufficient length of thread 46 is unwound from the bobbin and stored in the suction tube 45. The suction pipe 45 threads the thread 46 into the thread path above the air swirl nozzle 1. After placing it under the lifted trigger pressure roller, the suction tube 45 introduces the thread 46 to be attached into the slot 39 of the housing 14, into the groove 34 of the pin 32 and into the clamping line of the pair of rollers 25, 26. The thread 46 is stretched past the mouth 47 of a suction storage tube 48. The motor 20 is now switched on, so that the pair of rollers 25, 26 rotates backwards and the thread 46 is withdrawn from the suction tube 45. The thread 46 is drawn into the groove 34. The thread 46 drawn from the suction pipe 45 is stored in a loop in the storage pipe 48. After a precisely defined number of revolutions, which is measured by the proximity switch 23 and the counter connected to it, the motor 20 is stopped and the thread end is cut off immediately below the end face 37.

Der Träger 12 wird mittels des Zylinders 13 über der Luftwirbeldüse 1 positioniert. Das geschlitzte Gehäuse 14 verhindert, dass sich das Fadenende in der Nut 34 des Zapfens 32 nach der hinter der Luftwirbeldüse 1 angeordneten Absaugung ausrichtet. Das Gehäuse 14 schlägt an einen Anschlag 49 der Spinneinheit an, so dass der Zapfen 32 in der einen Richtung exakt relativ zur Achse 6 positioniert ist. Nun wird der Träger 15 mittels des Zylinders 17 abgesenkt. Dabei fährt der Zapfen 32 in die Erweiterung 8 ein und wird dadurch auch in der zweiten Richtung genau zur Achse 6 positioniert. Dazu kann es zweckmässig sein, den Arm 31 um eine zur Achse 35 des Zapfens 32 parallele Achse schwenkbar und federzentriert am Gehäuse 14 zu befestigen. Die Druckluft für die Bohrung 36 und der Motor 20 werden eingeschaltet. Die Rollen 25, 26 liefern den Faden 46 vom Speicherrohr 48 durch die Luftwirbeldüse 1 zurück. Die Stärke des Luftstromes muss so gewählt werden, dass sich an der engsten Stelle der Luftwirbeldüse 1 kein Rückstau bildet und der Faden 46 zuverlässig durch die Luftwirbeldüse 1 transportiert wird, damit die Absaugung der Luftwirbeldüse 1 den Faden nicht erfasst.The carrier 12 is positioned above the air swirl nozzle 1 by means of the cylinder 13. The slotted housing 14 prevents the thread end in the groove 34 of the pin 32 from aligning with the suction arranged behind the air swirl nozzle 1. The housing 14 strikes a stop 49 of the spinning unit so that the pin 32 is positioned exactly in one direction relative to the axis 6. Now the carrier 15 is lowered by means of the cylinder 17. The pin 32 moves into the extension 8 and is thereby positioned exactly in the second direction to the axis 6. For this purpose, it can be expedient to fasten the arm 31 to the housing 14 in a pivotable and spring-centered manner about an axis parallel to the axis 35 of the pin 32. The compressed air for bore 36 and motor 20 are turned on. The rollers 25, 26 return the thread 46 from the storage tube 48 through the air swirl nozzle 1. The strength of the air flow must be selected so that no back pressure forms at the narrowest point of the air swirl nozzle 1 and the thread 46 is reliably transported through the air swirl nozzle 1 so that the suction of the air swirl nozzle 1 does not catch the thread.

In der Zwischenzeit ist das Saugrohr 45 am Eintrittsende der Luftwirbeldüse 1 oberhalb des Lieferwal zenpaares 50 des nicht dargestellten Streckwerkes der Spinneinheit positioniert worden. Sobald das Fadenende aus dem Eintrittsende der Luftwirbeldüse 1 austritt, wird es ins Saugrohr 45 eingesaugt. Bevor der Fadenvorrat im Speicherrohr 48 zur Neige geht, wird der Träger 15 mittels des Zylinders 17 hochgefahren und anschliessend der Träger 12 mittels des Zylinders 13 in die Grundstellung nach Fig. 1 zurückgefahren. Durch den bei dieser Bewegung entstehenden Schrägzug wird der Faden 46 aus dem Klemmspalt des drehenden Rollenpaares 25, 26 ausgefahren. Es kann jedoch auch zweckmässig sein, die nicht angetriebene Rolle 26 mittels eines zusätzlichen Pneumatikzylinders von der Rolle 25 abhebbar auszubilden.In the meantime, the suction tube 45 has been positioned at the inlet end of the air swirl nozzle 1 above the pair of delivery rollers 50 of the drawing unit of the spinning unit, not shown. As soon as the thread end emerges from the entry end of the air swirl nozzle 1, it is sucked into the suction pipe 45. Before the thread supply in the storage tube 48 runs out, the carrier 15 is raised by means of the cylinder 17 and then the carrier 12 is returned to the basic position according to FIG. 1 by means of the cylinder 13. Due to the inclined pull resulting from this movement, the thread 46 is removed from the nip of the rotating pair of rollers 25, 26 extended. However, it can also be expedient to design the non-driven roller 26 to be liftable from the roller 25 by means of an additional pneumatic cylinder.

Schliesslich wird noch das Saugrohr 45 seitlich versetzt unterhalb des Lieferwalzenpaares 50 positioniert. Damit ist der Bedienungsautomat für den Ansetzvorgang bereit. Im Saugrohr 45 ist eine genau definierte Fadenlänge gespeichert, so dass beim Ansetzvorgang eine definierte Ueberlappung zwischen dem anzusetzenden Faden und dem durch das Streckwerk neu gelieferten Faserband erzielt wird.Finally, the suction tube 45 is positioned laterally offset below the pair of delivery rollers 50. The operator control is now ready for the attachment process. A precisely defined thread length is stored in the suction pipe 45, so that a defined overlap between the thread to be attached and the fiber sliver newly supplied by the drafting device is achieved during the piecing process.

Die Vorrichtung 2 wurde im Zusammenhang mit dem Einfädeln des Fadens in eine Luftwirbeldüse 1 beschrieben. Sie ist jedoch allgemein zum Einfädeln von Faden durch Oeffnungen bei Textilmaschinen anwendbar. Die Vorteile der erfindungsgemässen Ausbildung kommen besonders zur Geltung, wenn es sich dabei um relativ lange, enge Oeffnungen handelt.The device 2 has been described in connection with threading the thread into an air swirl nozzle 1. However, it is generally applicable for threading threads through openings in textile machines. The advantages of the design according to the invention are particularly evident when it comes to relatively long, narrow openings.

Claims (11)

Vorrichtung zum Einfädeln eines Fadens (46) durch eine Oeffnung (5) einer Textilmaschine, umfassend einen Andockkörper (32) mit einer axial durchgehenden Ausnehmung zur Aufnahme des Fadens (46) und einer mit einer Druckluftquelle verbindbaren Bohrung (36), sowie eine Einrichtung (10-13) zum Verschieben des Andockkörpers (32) quer zur Achsrichtung der Ausnehmung, dadurch gekennzeichnet, dass der Andockkörper (32) zapfenförmig ausgebildet ist, dass er eine gegen das eine axiale Ende verjüngte Mantelfläche (33) zum Zentrieren des Andockkörpers (32) in der Oeffnung (5) aufweist, dass die Ausnehmung als radial nach einer Seite offene Nut (34) ausgebildet ist, dass die Bohrung (36) annähernd achsparallel angeordnet ist und an der verjüngten Stirnfläche (37) des Andockkörpers (32) mündet, und dass zusätzlich eine Einrichtung (15,17) zum Verschieben des Andockkörpers (32) parallel zu seiner Achse (35) vorhanden ist.Device for threading a thread (46) through an opening (5) of a textile machine, comprising a docking body (32) with an axially continuous recess for receiving the thread (46) and a bore (36) which can be connected to a compressed air source, and a device ( 10-13) for displacing the docking body (32) transversely to the axial direction of the recess, characterized in that the docking body (32) is designed in the form of a pin, that it has a lateral surface (33) tapered towards the one axial end for centering the docking body (32) in the opening (5), that the recess is designed as a groove (34) which is open radially on one side, that the bore (36) is arranged approximately axially parallel and opens at the tapered end face (37) of the docking body (32), and that in addition there is a device (15, 17) for moving the docking body (32) parallel to its axis (35). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Nut (34) an der verjüngten Stirnfläche (37) exzentrisch zur Achse (35) des Andockkörpers (42) angeordnet ist.Device according to claim 1, characterized in that the groove (34) on the tapered end face (37) is arranged eccentrically to the axis (35) of the docking body (42). Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die verjüngte Mantelfläche (33) kegelförmig ist.Device according to claim 1 or 2, characterized in that the tapered lateral surface (33) is conical. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass sie auf der der verjüngten Stirnfläche (37) gegenüberliegenden Seite des Andockkörpers (32) zwei gegeneinander anliegende Rollen (25,26) aufweist, von denen eine mit einem Motor (20) verbunden ist.Device according to one of claims 1 to 3, characterized in that it has on the side of the docking body (32) opposite the tapered end face (37) two rollers (25, 26) resting against one another, one of which is connected to a motor (20) is. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die gemeinsame, die Berührungslinie der Rollen (25,26) enthaltende Tangentialebene der Rollen (25,26) mit der Mittelebene der Nut (34) zusammenfällt.Device according to claim 4, characterized in that the common tangential plane of the rolls (25, 26) containing the line of contact of the rolls (25, 26) coincides with the central plane of the groove (34). Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass mit der einen Rolle (25,26) ein Messelement (22,23) zum Messen ihres Drehwinkels verbunden ist.Apparatus according to claim 4 or 5, characterized in that a measuring element (22,23) for measuring its angle of rotation is connected to the one roller (25, 26). Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Messelement (22,23) einen Winkelschrittgeber und einen digitalen Zähler umfasst.Apparatus according to claim 6, characterized in that the measuring element (22,23) comprises an angle step encoder and a digital counter. Vorrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass die eine Rolle (26) von der anderen Rolle (25) abhebbar ist.Device according to one of claims 4 to 7, characterized in that one roller (26) can be lifted off the other roller (25). Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass um den Andockkörper (32) ein nach der verjüngten Seite des Andockkörpers (32) hin offenes Gehäuse (14) angeordnet ist, das einen mit der Nut (34) fluchtenden Schlitz (39) aufweist.Device according to one of Claims 1 to 8, characterized in that a housing (14) which is open towards the tapered side of the docking body (32) and which has a slot (39) aligned with the groove (34) is arranged around the docking body (32) ) having. Vorrichtung nach den Ansprüchen 4 und 9, dadurch gekennzeichnet, dass sich das Gehäuse (14) über die Rollen (25,26) erstreckt.Device according to claims 4 and 9, characterized in that the housing (14) extends over the rollers (25, 26). Vorrichtung nach Anspruch 9 oder 10, gekennzeichnet durch einen Anschlag (49) benachbart der Oeffnung (5) der Textilmaschine, gegen welchen das Gehäuse (14) in der Arbeitsstellung der Vorrichtung (2) anliegt.Device according to claim 9 or 10, characterized by a stop (49) adjacent to the opening (5) of the textile machine against which the housing (14) rests in the working position of the device (2).
EP19900123714 1989-12-19 1990-12-10 Device for threading a thread through the opening of a textile machine Expired - Lifetime EP0433832B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH455089 1989-12-19
CH4550/89 1989-12-19

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EP0433832A1 true EP0433832A1 (en) 1991-06-26
EP0433832B1 EP0433832B1 (en) 1994-02-16

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JP (1) JP2911593B2 (en)
DE (1) DE59004609D1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000626A1 (en) * 1992-06-25 1994-01-06 Maschinenfabrik Rieter Ag Process and device for automatically attaching yarn to be spun to the end of existing yarn
US5379581A (en) * 1991-01-04 1995-01-10 Tobler; Martin Apparatus for reverse-threading a central yarn-spinning passage
US5689945A (en) * 1991-11-21 1997-11-25 Maschinenfabrik Rieter Ag Drawing unit for a fine-spinning machine, in particular a jet-spinning machine
EP0874071A2 (en) * 1997-04-24 1998-10-28 Murata Kikai Kabushiki Kaisha Threading apparatus
EP1967620A2 (en) 2007-03-08 2008-09-10 Rieter CZ a.s. Method and device for introducing of yarn end into a spinning nozzle of a jet spinning machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022092A1 (en) * 1979-06-26 1981-01-07 Officine Savio S.p.A. Re-attachment device for an open-end type spinning frame
DE3336294C2 (en) * 1982-10-07 1987-05-14 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi, Jp
WO1988006650A1 (en) * 1987-03-02 1988-09-07 Schubert & Salzer Maschinenfabrik Aktiengesellscha Process and device for joining a thread to a spinning device with pneumatic twister

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022092A1 (en) * 1979-06-26 1981-01-07 Officine Savio S.p.A. Re-attachment device for an open-end type spinning frame
DE3336294C2 (en) * 1982-10-07 1987-05-14 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi, Jp
WO1988006650A1 (en) * 1987-03-02 1988-09-07 Schubert & Salzer Maschinenfabrik Aktiengesellscha Process and device for joining a thread to a spinning device with pneumatic twister

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP-U-6204666 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379581A (en) * 1991-01-04 1995-01-10 Tobler; Martin Apparatus for reverse-threading a central yarn-spinning passage
US5689945A (en) * 1991-11-21 1997-11-25 Maschinenfabrik Rieter Ag Drawing unit for a fine-spinning machine, in particular a jet-spinning machine
WO1994000626A1 (en) * 1992-06-25 1994-01-06 Maschinenfabrik Rieter Ag Process and device for automatically attaching yarn to be spun to the end of existing yarn
EP0874071A2 (en) * 1997-04-24 1998-10-28 Murata Kikai Kabushiki Kaisha Threading apparatus
EP0874071A3 (en) * 1997-04-24 1999-06-09 Murata Kikai Kabushiki Kaisha Threading apparatus
EP1967620A2 (en) 2007-03-08 2008-09-10 Rieter CZ a.s. Method and device for introducing of yarn end into a spinning nozzle of a jet spinning machine

Also Published As

Publication number Publication date
DE59004609D1 (en) 1994-03-24
JP2911593B2 (en) 1999-06-23
EP0433832B1 (en) 1994-02-16
JPH03193941A (en) 1991-08-23

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