EP0067279B2 - Hinging suction pipe for gripping a yarn from a spool - Google Patents

Hinging suction pipe for gripping a yarn from a spool Download PDF

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Publication number
EP0067279B2
EP0067279B2 EP82102807A EP82102807A EP0067279B2 EP 0067279 B2 EP0067279 B2 EP 0067279B2 EP 82102807 A EP82102807 A EP 82102807A EP 82102807 A EP82102807 A EP 82102807A EP 0067279 B2 EP0067279 B2 EP 0067279B2
Authority
EP
European Patent Office
Prior art keywords
thread
suction pipe
slide
slot
closure member
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
Application number
EP82102807A
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German (de)
French (fr)
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EP0067279B1 (en
EP0067279A1 (en
Inventor
Rupert Karl
Walter Mayer
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.)
Rieter Ingolstadt Spinnereimaschinenbau AG
Original Assignee
Schubert und Salzer Maschinenfabrik AG
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Publication date
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Application filed by Schubert und Salzer Maschinenfabrik AG filed Critical Schubert und Salzer Maschinenfabrik AG
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/22—Automatic winding machines, i.e. machines with servicing units for automatically performing end-finding, interconnecting of successive lengths of material, controlling and fault-detecting of the running material and replacing or removing of full or empty cores
    • B65H54/26—Automatic winding machines, i.e. machines with servicing units for automatically performing end-finding, interconnecting of successive lengths of material, controlling and fault-detecting of the running material and replacing or removing of full or empty cores having one or more servicing units moving along a plurality of fixed winding units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
    • B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a pivotable suction tube for receiving a thread from a bobbin, which has a longitudinally extending slot on its side facing the bobbin for transferring a thread to a working element, to which a controllable closure piece is assigned.
  • a suction tube for automatically taking up the thread from the bobbin, which can be pivoted into the immediate vicinity of the bobbin.
  • the suction tube has a longitudinal slot on its side facing the bobbin, so that a section of the thread sucked into the suction tube leaves it through the longitudinal slot in the manner of a chord, so that it is accessible to and from working organs that are involved in the piecing process this can be recorded (DE-A-2 008 142).
  • this slot has the disadvantage that a very large negative pressure must be generated because of the large negative pressure loss through the slot, so that the thread is safely taken up by the bobbin and sucked into the suction tube. A strong vacuum source with high power consumption is therefore required.
  • the object of the present invention is to create a suction tube for receiving a thread from a bobbin and for its defined transfer to a working organ, which works safely, quickly and with little effort.
  • the intake manifold is pivotable and divides the closure piece and is designed as a slide movable transversely to the longitudinal slot, which covers the entire length of the longitudinal slot in its closed position and releases the thread by its movement into the open position.
  • the pivotability of the suction tube also ensures that the thread reaches the area that is also reached by the working organ, so that expensive thread transmitters are avoided. In this way, the entire thread transfer can take place in a space-saving manner in a very small space. Because the closure piece is subdivided, the shape and control of the partial closure pieces can be adapted to the pipe sections assigned to them. In addition, in such an embodiment of the subject matter of the invention, the two partial closure pieces can be actuated one after the other.
  • the suction pipe advantageously has a pipe section with an axially symmetrical shape, while the closure piece in the region of the pipe section is designed as a rotary slide valve provided with an axial slot.
  • the rotary valve preferably surrounds this pipe section.
  • the axial slot in the rotary slide valve is wider than the longitudinal slot in the tube section in order to be able to maintain large tolerances in the adjustment paths for the closure piece designed as a rotary slide valve with reliable function.
  • the end of the closure piece facing the bobbin is expediently mounted in a groove of the suction tube.
  • the thread is guided in the longitudinal slot of the non-adjustable part of the suction tube on both sides of the closure piece and is thus prevented from following the movement of the closure piece, which then ensures that the thread is not carried along between the non-adjustable suction tube and the closure piece .
  • the closure piece can be driven in various ways, for example by a single drive which acts in two directions. Conveniently, however, the closure piece is by an elastic element, for. B. a spring, which holds it when released by its actuator in its closing position defined by a stop. In this way, a very simple drive can be used to adjust the closure piece. It is preferably provided as the drive that the closure piece carries a stop to which a counter-stop which becomes effective as a function of the pivoting movement of the suction tube is assigned.
  • the suction tube has a thread-receiving part facing the bobbin with a gap-like cross-section and with a rectilinearly movable slide and, at an angle to the thread-receiving part, a main part with an axially symmetrical cross-section and with a rotary slide, the slide and the rotary slide being controlled as a function of the pivoting movement of the suction tube.
  • a thread-receiving part facing the bobbin with a gap-like cross-section and with a rectilinearly movable slide and, at an angle to the thread-receiving part, a main part with an axially symmetrical cross-section and with a rotary slide, the slide and the rotary slide being controlled as a function of the pivoting movement of the suction tube.
  • the subject of the invention also has the advantage that the thread is not released at an undesired point in time and can be pulled out of the intake manifold by external influences or thus be affected in some way, since it is only when it is to be taken over by another work organ, is released to the work area of this work organ by releasing the longitudinal slot.
  • the open-end spinning machine 1 is assigned a piecing device 2 which can be moved along the machine.
  • FIG. 1 shows a spinning station shown only with its parts essential for understanding the invention.
  • Each of these spinning stations has a spinning device 10, from which the thread 5 produced there is drawn off through a draw-off tube 100 with the aid of draw-off rollers 11/12.
  • the thread 5 is wound during normal spinning operation with the aid of a traversing thread guide 17 onto a bobbin 13 which is rotatably carried between two bobbin arms 14 and is driven by being supported on a drive shaft 15.
  • the thread tension 16 is registered in the thread path 16 and the drop in the thread tension is registered and the fiber feed is switched off in the spinning device 10.
  • a coil support element 18 is pushed between the drive shaft 15 and the coil 13, so that the coil 13 is stopped.
  • the piecing device 2 has, in addition to other elements not explained here, a pivotable suction tube 3, the end of which facing the coil 13 is formed in the form of a gap and extends over the entire width of the coil 13.
  • This gap-like cross section of the thread receiving part 31 merges into a round cross section which extends over the main part 30 of the suction pipe 3.
  • the end of this tube section forming the main part 30 facing away from the coil 13 is connected directly or via an articulated intermediate piece 40 to an intake port 4 which is stationary with respect to the piecing device 2 and which in turn is connected to a vacuum source (not shown).
  • the intake manifold 3 is assigned a swivel drive which has a swivel lever 41 holding the intake manifold 3 and a drive rod 42 which are connected to one another via a coupling member 43.
  • the thread receiving part 31 is arranged at an angle to the cylindrical main part 30, the main part 30 and the thread receiving part 31 being connected to one another in a rotationally fixed manner.
  • the thread receiving part 31 and the main part 30 have a continuous longitudinal slot 32.
  • the main part 30 is surrounded by a sleeve forming a rotary slide 33, which has an axial slot 330 over its entire length.
  • the rotary valve 33 has at its end facing away from the coil 13 a flange 331 in which one end of a torsion spring 34 is anchored.
  • the other end of the torsion spring 34 is anchored in a flange 300 carried by the main part 30 of the suction pipe 3.
  • the rotary slide 33 carries a stop 333 designed as a roller on a radial arm 332, to which a stationary stop 20 in the piecing device 2 is assigned. This assignment is made so that the stop 333 in the last part of its movement 1 in its dashed starting position shown in dashed lines on the stop 20 and rotates the rotary valve 33 against the action of the torsion spring 34 in the position shown in FIG. 2, in which the axial slot 330 releases the longitudinal slot 32.
  • the rotary slide 33 has a radially projecting stop 334, to which a stop 310 on the thread receiving part 31 is assigned.
  • the thread receiving part 31 has no cylindrical shape, since it has a mouth that extends over the entire bobbin width, so that no rotary slide valve can be used as the closure part as in the main part 30. Therefore, the thread receiving part 31 has a guide surface in the area around the longitudinal slot 32, along which a slide 35 can be displaced perpendicular to the course of the longitudinal slot 32.
  • the slide 35 is guided in a holder 36 (FIG. 2) carried by the suction pipe 3, to which the pivot lever 41 is also articulated.
  • the slide 35 is acted upon in the closing direction by a compression spring 360 supported on the holder 36.
  • a fork 351 which also serves as a stop and carries a stop 352 designed as a roller, is connected to the slide 35 via a guide pin 350.
  • the swivel lever 41 carries a stop 410 designed as a control wedge, which is arranged on the swivel lever 41 in such a way that the stop 410 engages in the last part of the movement of the suction pipe 3 from its thread take-up position into the starting position on the side of the stop 352 facing the slide 35 and this and thus also moves the slide 35 so far that the longitudinal slot 32 is released.
  • This piecing device 2 has u. a. a spool lifting arm 21, which is pivotally mounted and can be brought into contact with the spool arm 14.
  • the piecing device 2 also has a pair of feed rollers 22, which is pivotably supported by means of a swivel arm 220 in such a way that when it swivels, it can grasp the thread 5 emerging from the suction pipe 3 and bring it exactly up to the take-off pipe 100.
  • the subject matter of the invention works as follows: If a thread breakage occurs - which can occur both when the machine is switched off or as a result of a fault in the thread - the end of the thread 5 reaches the bobbin 13.
  • the thread monitor 16 causes the thread tension to drop, that the fiber feed is placed in the spinning element and the bobbin support element 18 lifts the bobbin 13 from its drive shaft 15.
  • the piecing device 2 is now called in a known manner to the spinning station concerned, where it lifts the bobbin 13 from the bobbin support element 18 with the aid of the pivotable bobbin lifting arm 21.
  • the suction pipe 3 is pivoted in the direction of the coil 13 up to its immediate vicinity.
  • the stops 333 and 352 are released by the stops 20 and 410, so that the slide 35 and the rotary slide 33 close the longitudinal slot 32 of the suction pipe 3 under the action of the springs 34 and 360.
  • the stop 334 and the fork 351 come to rest against the stop 310 or the holder 36.
  • the suction pipe 3 is connected to a vacuum source, while the coil 13 is driven in a manner not shown in the unwinding direction.
  • the suction air flow acting in the thread receiving part 31 of the suction tube 3 detects the thread end and pulls the thread 5 released by turning the spool 13 back into the suction tube 3. Since the longitudinal slot 32 of the suction pipe 3 is closed, no negative pressure is lost, so that the entire negative pressure applied to the suction pipe 3 becomes effective at the mouth of its thread-receiving part 31.
  • a sufficient length of thread 5 has been drawn off - which is controlled in a known manner, for example by the number of revolutions of the bobbin 13 or its drive in the unwinding direction - the suction tube 3 is moved from its thread take-up position shown in full line in FIG. 1 to its starting position (dashed lines) shown) pivoted back.
  • the stop 333 runs onto the stop 20 which is stationary with respect to the piecing device 2, while the stop 352 runs onto the stop 410, which is carried as a control wedge and is carried by the swivel lever 41, which, if desired, can also be done in a time-graded manner.
  • the longitudinal slot 32 is released by the slide 35 and by the rotary slide 33, which together form a divided closure piece.
  • the thread 5 emerges from the longitudinal slot 32 in an attempt to take the shortest path between the bobbin 13 and the end of the longitudinal slot 32 facing away from the bobbin 13, while the free end of the thread extends into the drinking spout 4 and thus in the suction pipe 3 is kept safe.
  • the outside of the intake manifold The outside of the intake manifold.
  • the fiber feed into the spinning element is released in a known manner and the bobbin 13 is lowered onto the bobbin support element 18 by lowering the bobbin lifting arm.
  • This is now withdrawn so that the bobbin 13 is driven again in the winding direction and the thread 5 again enters the working area of the traversing thread guide 13 and, due to the restored thread tension, into the clamping line of the take-off rollers 11/12.
  • the suction air in the suction pipe 3 is now also turned off. The piecing process is now complete.
  • the closure piece can, as the above description shows, be designed differently. Its shape also largely depends on the shape of the suction pipe 3. It can e.g. B. a single closure piece may be provided, which extends over the entire length of the longitudinal slot 32.
  • This main part is not required to have a cylindrical shape; other axisymmetric shapes, e.g. B. cone with low taper or composite body with circular cross sections are also possible.
  • this axisymmetric shape the design of the closure piece as a rotary slide 33 - with an axial slot 330 - is possible, which has advantages in terms of manufacture, storage and guidance on the intake manifold 3.
  • the rotary slide 33 is designed as a jacket surrounding the main part 30 of the suction pipe 3, since it is then particularly easy to actuate the rotary slide 33.
  • the closure piece (slide 35 and / or rotary slide 33) can be controlled in various ways by a stationary stop 20 or by a stop 410 arranged on the linkage of the suction pipe 3, which is activated by the pivoting movement of the suction pipe 3; but it is also possible to provide other drives for the adjustment of the closure piece. This can act on the closure piece in both directions, for. B. in the form of an electromagnet or a hydraulic or pneumatic piston. But it is also possible that the drive controls only one movement and that the closure piece (slide 35, rotary slide 33) is acted upon by a spring (34, 360) or another elastic element which, when released by its drive (e.g. B. stops 20 and 410) abut against a stop (310 or fork 351).
  • a spring 34, 360
  • another elastic element which, when released by its drive (e.g. B. stops 20 and 410) abut against a stop (310 or fork 351).
  • This position then corresponds to the closed position of the closure piece.
  • This elastic element can then be attached in any way between the suction pipe 3 and the slide 35 or rotary slide 33, z. B. as a compression spring or tension spring between extension arms or as a torsion spring etc.
  • the closure piece is mounted in a groove 37 or 38.
  • this groove 38 is formed by turning the mouth of the thread receiving part 31 inside out, so that the slide 35 is guided between the thread receiving part 31 itself and the inside out 311.
  • this groove 37 is formed between the main part 30 of the suction tube 3, which is non-rotatably connected to the thread take-up part 31, and an annular projection 312 of the thread take-up part 31.
  • both the inverted portion 311 and the annular projection 312 are also slotted in accordance with the longitudinal slot 32 of the suction pipe 3.
  • the thread 5 rests on the end of the closing piece (slide 35 or rotary slide 33) facing the bobbin 13, the thread 5 becomes on both sides of the closing piece by the thread receiving part 31 and its inverted portion 311 or the main part 30 of the suction tube 3 and the projection 312 of the thread receiving part 31 out.
  • the closure piece is moved relative to the suction pipe 3, the thread 5 is prevented by the closure piece by this guide on both sides, the movement of the Ver to follow the closing piece, thereby also preventing the thread 5 from becoming jammed between the closing piece and the suction pipe 3. Since the thread 5 is severed and the separated thread end is removed when the thread 5 in position 5 'is taken over by the feed roller pair 22, the thread 5 cannot be pinched by the closure piece even when the longitudinal slot 32 is closed.
  • the subject matter of the invention also offers the advantage that the thread 5 is not released at an undesired point in time and can be pulled out of the suction pipe 3 by external influences or can thus be somehow impaired because it if it is to be taken over by another work organ, is released to the working area of this work organ by releasing the longitudinal slot 32.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)

Description

Die vorliegende Erfindung betrifft ein schwenkbares Saugrohr zur Aufnahme eines Fadens von einer Spule, das zur Übergabe eines Fadens an ein Arbeitsorgan auf seiner der Spule zugewandten Seite einen sich in Längsrichtung erstreckenden Schlitz aufweist, dem ein steuerbares Verschlussstück zugeordnet ist.The present invention relates to a pivotable suction tube for receiving a thread from a bobbin, which has a longitudinally extending slot on its side facing the bobbin for transferring a thread to a working element, to which a controllable closure piece is assigned.

Zum automatischen Anspinnen ist es bei Offenend-Spinnmaschinen bekannt, zur automatischen Aufnahme des Fadens von der Spule ein Saugrohr vorzusehen, das in die unmittelbare Nähe der Spule geschwenkt werden kann. Das Saugrohr weist auf seiner der Spule zugewandten Seite einen Längsschlitz auf, so dass ein Abschnitt des in das Saugrohr hineingesaugten Fadens dieses durch den Längsschlitz in Art einer Sehne wieder verlässt, so dass er für Arbeitsorgane, die am Anspinnvorgang beteiligt sind, zugänglich ist und von diesen erfasst werden kann (DE-A-2 008 142). Dieser Schlitz hat jedoch den Nachteil, dass ein sehr grosser Unterdruck erzeugt werden muss wegen des grossen Unterdruckverlustes durch den Schlitz, damit der Faden sicher von der Spule aufgenommen wird und in das Saugrohr hineingesaugt wird. Eine starke Unterdruckquelle mit hoher Leistungsaufnahme ist somit erforderlich.For automatic piecing, it is known in open-end spinning machines to provide a suction tube for automatically taking up the thread from the bobbin, which can be pivoted into the immediate vicinity of the bobbin. The suction tube has a longitudinal slot on its side facing the bobbin, so that a section of the thread sucked into the suction tube leaves it through the longitudinal slot in the manner of a chord, so that it is accessible to and from working organs that are involved in the piecing process this can be recorded (DE-A-2 008 142). However, this slot has the disadvantage that a very large negative pressure must be generated because of the large negative pressure loss through the slot, so that the thread is safely taken up by the bobbin and sucked into the suction tube. A strong vacuum source with high power consumption is therefore required.

Zur Vermeidung dieses Nachteils ist es auch bereits bekannt, ein Saugrohr ohne Schlitz auszubilden (DE-A-2 620 805). Um hier dennoch den Faden zugänglich machen und einem Arbeitsorgan zuführen zu können, werden zusätzliche Greif- und Fadenführungsorgane benötigt, um den vom Saugrohr erfassten Faden einem Arbeitsorgan zuzuführen.To avoid this disadvantage, it is also known to design a suction pipe without a slot (DE-A-2 620 805). In order to still be able to make the thread accessible and to feed it to a working organ, additional gripping and thread guiding members are required to feed the thread caught by the suction pipe to a working organ.

Es ist auch bekannt, dem Saugrohr ein Verschlusselement zuzuordnen (FR-A-1584194). Dieses Verschlusselement sitzt schwenkbar auf einer Achse, die parallel zum Hauptteil des Saugrohres angeordnet ist. Bei einer solchen Ausführung besteht die Gefahr, dass der Faden beim Abheben des Verschlusselementes an diesem haften bleibt und zu einem unbestimmten Augenblick freigegeben wird, so dass auch die Bahn, die der Faden bis zum Erreichen des gestreckten Fadenlaufs durchläuft, nicht bestimmt ist.It is also known to assign a closure element to the suction pipe (FR-A-1584194). This closure element is pivotally seated on an axis which is arranged parallel to the main part of the suction pipe. In such an embodiment, there is a risk that the thread will stick to the closure element when it is lifted off and will be released at an indefinite moment, so that the path through which the thread runs until the stretched thread path is reached is not determined.

Aufgabe der vorliegenden Erfindung ist es, ein Saugrohr zur Aufnahme eines Fadens von einer Spule und zu seiner definierten Übergabe an ein Arbeitsorgan zu schaffen, das sicher, schnell und unter geringem Aufwand arbeitet.The object of the present invention is to create a suction tube for receiving a thread from a bobbin and for its defined transfer to a working organ, which works safely, quickly and with little effort.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Saugrohr schwenkbar ist und das Verschlußstück unterteilt und als ein quer zum Längsschlitz bewegbarer Schieber ausgebildet ist, der in seiner Verschlußstellung im wesentlichen die gesamte Länge des Längsschlitzes abdeckt und durch seine Bewegung in die Öffnungsstellung den Faden freigibt. Durch die Schwenkbarkeit des Saugrohres wird außerdem erreicht, daß der Faden sicher in den Bereich gelangt, der auch vom Arbeitsorgan erreicht wird, so daß aufwendige Fadenübergeber vermieden werden. Auf diese Weise kann die gesamte Fadenübergabe platzsparend auf engstem Raum erfolgen. Dadurch, daß das Verschlußstück unterteilt ist, können Form und Steuerung der Teilverschlußstücke den ihnen zugeordneten Rohrabschnitten angepaßt werden. Darüber hinaus können bei einer solchen Ausbildung des Erfindungsgegenstandes die beiden Teilverschlußstücke zeitlich nacheinander betätigt werden.This object is achieved in that the intake manifold is pivotable and divides the closure piece and is designed as a slide movable transversely to the longitudinal slot, which covers the entire length of the longitudinal slot in its closed position and releases the thread by its movement into the open position. The pivotability of the suction tube also ensures that the thread reaches the area that is also reached by the working organ, so that expensive thread transmitters are avoided. In this way, the entire thread transfer can take place in a space-saving manner in a very small space. Because the closure piece is subdivided, the shape and control of the partial closure pieces can be adapted to the pipe sections assigned to them. In addition, in such an embodiment of the subject matter of the invention, the two partial closure pieces can be actuated one after the other.

Vorteilhafterweise besitzt das Saugrohr dabei einen Rohrabschnitt mit achssymmetrischer Form, während das Verschlussstück im Bereich des Rohrabschnittes als ein mit einem Axialschlitz versehener Drehschieber ausgebildet ist. Der besseren Steuerzugänglichkeit wegen umgibt der Drehschieber vorzugsweise diesen Rohrabschnitt.The suction pipe advantageously has a pipe section with an axially symmetrical shape, while the closure piece in the region of the pipe section is designed as a rotary slide valve provided with an axial slot. For better control accessibility, the rotary valve preferably surrounds this pipe section.

Um bei den Stellwegen für das als Drehschieber ausgebildete Verschlussstück grosse Toleranzen einhalten zu können bei sicherer Funktion, ist gemäss einem weiteren Merkmal der Erfindung der Axialschlitz im Drehschieber breiter als der Längsschlitz im Rohrabschnitt.According to a further feature of the invention, the axial slot in the rotary slide valve is wider than the longitudinal slot in the tube section in order to be able to maintain large tolerances in the adjustment paths for the closure piece designed as a rotary slide valve with reliable function.

Damit beim Verstellen des als Schieber ausgebildeten Verschlussstückes ein Einklemmen des Fadens mit Sicherheit vermieden wird, ist zweckmässigerweise das der Spule zugewandte Ende des Verschlussstückes in einer Nut des Saugrohres gelagert. Auf diese Weise wird der Faden im Längsschlitz des nicht verstellbaren Teils des Saugrohres beidseitig des Verschlussstückes geführt und somit daran gehindert, der Bewegung des Verschlussstückes zu folgen, wodurch dann sichergestellt wird, dass der Faden nicht bis zwischen das nicht verstellbare Saugrohr und das Verschlussstück mitgenommen wird.To ensure that the thread is reliably prevented from jamming when adjusting the closure piece designed as a slide, the end of the closure piece facing the bobbin is expediently mounted in a groove of the suction tube. In this way, the thread is guided in the longitudinal slot of the non-adjustable part of the suction tube on both sides of the closure piece and is thus prevented from following the movement of the closure piece, which then ensures that the thread is not carried along between the non-adjustable suction tube and the closure piece .

Der Antrieb des Verschlussstückes kann auf verschiedene Weise erfolgen, beispielsweise durch einen einzigen, in zwei Richtungen zur Wirkung kommenden Antrieb. Zweckmässigerweise ist das Verschlussstück jedoch durch ein elastisches Element, z. B. eine Feder, beaufschlagt, das es bei Freigabe durch seinen Stellantrieb in seiner durch einen Anschlag definierten Schliessstellung hält. Auf diese Weise kann zur Verstellung des Verschlussstückes ein sehr einfacher Antrieb Anwendung finden. Vorzugsweise ist als Antrieb vorgesehen, dass das Verschlussstück einen Anschlag trägt, dem ein in Abhängigkeit von der Schwenkbewegung des Saugrohres wirksam werdender Gegenanschlag zugeordnet ist.The closure piece can be driven in various ways, for example by a single drive which acts in two directions. Conveniently, however, the closure piece is by an elastic element, for. B. a spring, which holds it when released by its actuator in its closing position defined by a stop. In this way, a very simple drive can be used to adjust the closure piece. It is preferably provided as the drive that the closure piece carries a stop to which a counter-stop which becomes effective as a function of the pivoting movement of the suction tube is assigned.

Dadurch, dass während der Aufnahme des Fadens an der Spule und während des Abziehens des Fadens der Längsschlitz im Saugrohr geschlossen ist, tritt während dieser Phase kein Unterdruckverlust im Saugrohr auf und der Unterdruck wirkt voll auf den Faden ein. Hierdurch ist gegenüber den bisher bekannten geschlitzten Saugrohren ein erheblicher Minderbedarf an Unterdruck erforderlich, so dass die Unterdruckquelle kleiner sein kann, was die Wirtschaftlichkeit der Arbeit dieses Saugrohres wesentlich erhöht. Da der Faden durch den jetzt freigegebenen Schlitz teilweise aus dem Saugrohr austreten kann und dabei bis in unmittelbare Nähe eines Arbeitsorganes gelangt, ist weder ein grosser Schwenkweg des Saugrohres noch ein zusätzliches Zuführorgan erforderlich, das den Faden über einen weiteren Weg vom Fadenlauf zwischen der Mündung des Saugrohres und der Spule bis hin zum Arbeitsorgan befördert. Durch die erfindungsgemässe Vorrichtung wird somit gegenüber am Umfang geschlossenen Saugrohren auch eine grosse Platz- und Zeitersparnis durch das Entfallen zusätzlicher Schwenkwege erzielt.Because the longitudinal slot in the suction tube is closed while the thread is being picked up on the spool and while the thread is being pulled off, there is no loss of vacuum in the suction tube during this phase and the vacuum acts fully on the thread. As a result, a considerable reduction in vacuum is required compared to the previously known slotted suction pipes, so that the vacuum source le can be smaller, which significantly increases the economy of the work of this suction pipe. Since the thread can partially emerge from the suction pipe through the now released slot and thereby get into the immediate vicinity of a working element, neither a large swiveling path of the suction pipe nor an additional feed element is required, which takes the thread over a further path from the thread path between the mouth of the Suction tube and the coil transported to the working organ. The device according to the invention thus also saves a large amount of space and time compared to suction pipes closed on the circumference by eliminating additional pivoting paths.

Vorzugsweise weist das Saugrohr ein der Spule zugewandtes Fadenaufnahmeteil mit spaltartigem Querschnitt und mit einem geradlinig bewegbaren Schieber sowie im Winkel zum Fadenaufnahmeteil ein Hauptteil mit achssymmetrischem Querschnitt und mit einem Drehschieber auf, wobei der Schieber und der Drehschieber in Abhängigkeit von der Schwenkbewegung des Saugrohres gesteuert werden. Hierdurch wird in einfacher Weise eine Anpassung der Verschlußstücke in Form und Bewegung an unterschiedliche Teilabschnitte des Saugrohres sowie ein zeitversetztes Betätigen der beiden Teilverschlußstücke erreicht.Preferably, the suction tube has a thread-receiving part facing the bobbin with a gap-like cross-section and with a rectilinearly movable slide and, at an angle to the thread-receiving part, a main part with an axially symmetrical cross-section and with a rotary slide, the slide and the rotary slide being controlled as a function of the pivoting movement of the suction tube. In this way, an adaptation of the closure pieces in shape and movement to different partial sections of the suction pipe and a time-delayed actuation of the two partial closure pieces is achieved in a simple manner.

Neben den genannten Vorteilen der Platz-, Unterdruck- und Zeiterspamis bietet der Erfindungsgegenstand noch den Vorteil, daß der Faden nicht zu einem ungewünschten Zeitpunkt freigegeben ist und durch äußere Einflüsse aus dem Saugrohr herausgezogen oder somit irgendwie beeinträchtigt werden kann, da er erst, wenn er von einem anderen Arbeitsorgan übernommen werden soll, durch Freigabe des Längsschlitzes dem Arbeitsbereich dieses Arbeitsorganes zugeführt wird.In addition to the above-mentioned advantages of space, vacuum and time spam, the subject of the invention also has the advantage that the thread is not released at an undesired point in time and can be pulled out of the intake manifold by external influences or thus be affected in some way, since it is only when it is to be taken over by another work organ, is released to the work area of this work organ by releasing the longitudinal slot.

Weitere Einzelheiten der Erfindung werden nachstehend anhand von Zeichnungen näher erläutert. Es zeigen :

  • Fig. eine Offenend-Spinnstelle mit dem erfindungsgemäss ausgebildeten Saugrohr in der Seitenansicht, wobei neben der mit voller Linie gezeigten Fadenaufnahmestellung des Saugrohres dessen Ausgangsstellung durch gestrichelte Linien angedeutet ist;
  • Fig. 2 eine Ansicht auf die den Schlitz aufweisende Seite des In Fig. 1 gezeigten Saugrohres sowie der Steuerorgane für die dem Schlitz zugeordneten Verschlussstücke ;
  • Fig. 3 einen Querschnitt durch das Saugrohr im Bereich des der Spule zugewandten Endes des Verschlussstückes ; und
  • Fig. 4 eine perspektivische Ansicht der Mündung des Fadenaufnahmeteils des Saugrohres sowie eines Teils des Verschlussstückes.
Further details of the invention are explained in more detail below with reference to drawings. Show it :
  • Fig. An open-end spinning station with the suction tube designed according to the invention in side view, wherein in addition to the thread-receiving position of the suction tube shown in full line, its starting position is indicated by dashed lines;
  • FIG. 2 shows a view of the side of the suction tube shown in FIG. 1 and the control elements for the closure pieces assigned to the slot;
  • 3 shows a cross section through the suction tube in the region of the end of the closure piece facing the coil; and
  • Fig. 4 is a perspective view of the mouth of the thread receiving part of the suction tube and a part of the closure piece.

Der nachstehend anhand der Fig. 1 erläuterte Erfindungsgegenstand kann prinzipiell an jeder individuellen Spinnstelle einer Offenend-Spinnmaschine 1 vorgesehen sein. Üblicherweise ist jedoch, um das Anspinnen des Fadens an einer Vielzahl von Spinnstellen sicher durchführen zu können und um hierbei ferner Fadenansetzer gleicher Qualität zu erhalten, der Offenend-Spinnmaschine 1 eine längs der Maschine verfahrbare Anspinnvorrichtung 2 zugeordnet.The subject matter of the invention explained below with reference to FIG. 1 can in principle be provided at each individual spinning position of an open-end spinning machine 1. Usually, however, in order to be able to carry out the spinning of the thread safely at a plurality of spinning positions and also to obtain thread attachments of the same quality in this case, the open-end spinning machine 1 is assigned a piecing device 2 which can be moved along the machine.

In Fig. 1 ist eine nur mit ihren für das Verständnis der Erfindung wesentlichen Teilen dargestellte Spinnstelle gezeigt. Jede dieser Spinnstellen besitzt eine Spinnvorrichtung 10, aus welcher der dort erzeugte Faden 5 durch ein Abzugsrohr 100 mit Hilfe von Abzugswalzen 11/12 abgezogen wird. Der Faden 5 wird während des normalen Spinnbetriebes mit Hilfe eines Changierfadenführers 17 auf eine Spule 13 aufgewickelt, die zwischen zwei Spulenarmen 14 drehbar getragen wird und durch Auflage auf einer Antriebswelle 15 angetrieben wird.1 shows a spinning station shown only with its parts essential for understanding the invention. Each of these spinning stations has a spinning device 10, from which the thread 5 produced there is drawn off through a draw-off tube 100 with the aid of draw-off rollers 11/12. The thread 5 is wound during normal spinning operation with the aid of a traversing thread guide 17 onto a bobbin 13 which is rotatably carried between two bobbin arms 14 and is driven by being supported on a drive shaft 15.

Tritt ein Fadenbruch auf, so wird durch einen im Fadenlauf befindlichen Fadenwächter 16 das Absinken der Fadenspannung registriert und das Abstellen der Faserzufuhr in die Spinnvorrichtung 10 bewirkt. Gleichzeitig wird ein Spulenstützelement 18 zwischen Antriebswelle 15 und Spule 13 geschoben, so dass die Spule 13 stillgesetzt wird.If a thread break occurs, the thread tension 16 is registered in the thread path 16 and the drop in the thread tension is registered and the fiber feed is switched off in the spinning device 10. At the same time, a coil support element 18 is pushed between the drive shaft 15 and the coil 13, so that the coil 13 is stopped.

Die Anspinnvorrichtung 2 weist neben anderen, hier nicht erläuterten Elementen ein schwenkbares Saugrohr 3 auf, dessen der Spule 13 zugewandtes Ende spaltförmig ausgebildet ist und sich über die gesamte Breite der Spule 13 erstreckt. Dieser spaltartige Querschnitt des Fadenaufnahmeteils 31 geht in einen runden Querschnitt über, der sich über den Hauptteil 30 des Saugrohres 3 erstreckt. Je nach Ausbildung des Saugrohres 3 ist das der Spule 13 abgewandte Ende dieses den Hauptteil 30 bildenden Rohrabschnittes direkt oder über ein gelenkiges Zwischenstück 40 mit einem in bezug auf die Anspinnvorrichtung 2 stationären Saugstutzen 4 gelenkig verbunden, der seinerseits mit einer nichtgezeigten Unterdruckquelle in Verbindung steht. Dem Saugrohr 3 ist ein Schwenkantrieb zugeordnet, der einen das Saugrohr 3 haltenden Schwenkhebel 41 sowie eine Antriebsstange 42 aufweist, die über ein Koppelglied 43 miteinander verbunden sind.The piecing device 2 has, in addition to other elements not explained here, a pivotable suction tube 3, the end of which facing the coil 13 is formed in the form of a gap and extends over the entire width of the coil 13. This gap-like cross section of the thread receiving part 31 merges into a round cross section which extends over the main part 30 of the suction pipe 3. Depending on the design of the suction tube 3, the end of this tube section forming the main part 30 facing away from the coil 13 is connected directly or via an articulated intermediate piece 40 to an intake port 4 which is stationary with respect to the piecing device 2 and which in turn is connected to a vacuum source (not shown). The intake manifold 3 is assigned a swivel drive which has a swivel lever 41 holding the intake manifold 3 and a drive rod 42 which are connected to one another via a coupling member 43.

Wie aus Fig. 2 hervorgeht, ist der Fadenaufnahmeteil 31 winkelig zum zylindrischen Hauptteil 30 angeordnet, wobei Hauptteil 30 und Fadenaufnahmeteil 31 drehfest miteinander verbunden sind. Das Fadenaufnahmeteil 31 und das Hauptteil 30 weisen einen durchgehenden Längsschlitz 32 auf. Das Hauptteil 30 ist von einer einen Drehschieber 33 bildenden Hülse umgeben, die über ihre ganze Länge einen Axialschlitz 330 aufweist. Der Drehschieber 33 besitzt an seinem der Spule 13 abgewandten Ende einen Flansch 331, in welchem das eine Ende einer Torsionsfeder 34 verankert ist. Das andere Ende der Torsionsfeder 34 ist in einem vom Hauptteil 30 des Saugrohres 3 getragenen Flansch 300 verankert.As can be seen from FIG. 2, the thread receiving part 31 is arranged at an angle to the cylindrical main part 30, the main part 30 and the thread receiving part 31 being connected to one another in a rotationally fixed manner. The thread receiving part 31 and the main part 30 have a continuous longitudinal slot 32. The main part 30 is surrounded by a sleeve forming a rotary slide 33, which has an axial slot 330 over its entire length. The rotary valve 33 has at its end facing away from the coil 13 a flange 331 in which one end of a torsion spring 34 is anchored. The other end of the torsion spring 34 is anchored in a flange 300 carried by the main part 30 of the suction pipe 3.

Der Drehschieber 33 trägt einen an einem radialen Ausleger 332 als Rolle ausgebildeten Anschlag 333, dem ein stationärer Anschlag 20 in der Anspinnvorrichtung 2 zugeordnet ist. Diese Zuordnung ist dabei so getroffen, dass der Anschlag 333 im letzten Teil seiner Bewegung aus der in Fig. 1 mit voller Linie dargestellten Fadenaufnahmestellung in seine gestrichelt dargestellte Ausgangsstellung auf den Anschlag 20 aufläuft und den Drehschieber 33 entgegen der Wirkung der Torsionsfeder 34 in die in Fig. 2 gezeigte Stellung verdreht, in welcher der Axialschlitz 330 den Längsschlitz 32 freigibt. An seinem dem Fadenaufnahmeteil 31 des Saugrohres 3 zugewandten Ende besitzt der Drehschieber 33 einen radial vorstehenden Anschlag 334, dem ein Anschlag 310 am Fadenaufnahmeteil 31 zugeordnet ist. Solange der Anschlag 333 durch den stationären Anschlag 20 freigegeben ist, liegt der Anschlag 334 durch die Wirkung der Torsionsfeder 34 am Anschlag 310 an, so dass diese beiden Anschläge 334 und 310 den Drehschieber 33 in einer solchen Schliessstellung halten, dass der Anschlag 333 bei der Schwenkbewegung des Saugrohres 3 mit Sicherheit auf den Anschlag 20 auflaufen kann.The rotary slide 33 carries a stop 333 designed as a roller on a radial arm 332, to which a stationary stop 20 in the piecing device 2 is assigned. This assignment is made so that the stop 333 in the last part of its movement 1 in its dashed starting position shown in dashed lines on the stop 20 and rotates the rotary valve 33 against the action of the torsion spring 34 in the position shown in FIG. 2, in which the axial slot 330 releases the longitudinal slot 32. At its end facing the thread receiving part 31 of the suction tube 3, the rotary slide 33 has a radially projecting stop 334, to which a stop 310 on the thread receiving part 31 is assigned. As long as the stop 333 is released by the stationary stop 20, the stop 334 bears against the stop 310 due to the action of the torsion spring 34, so that these two stops 334 and 310 hold the rotary slide 33 in such a closed position that the stop 333 at the Pivoting movement of the suction pipe 3 can surely run onto the stop 20.

Das Fadenaufnahmeteil 31 weist keine zylindrische Form auf, da es eine sich über die ganze Spulenbreite erstreckende Mündung besitzt, so dass als Verschlussstück kein Drehschieber wie beim Hauptteil 30 Anwendung finden kann. Deshalb besitzt das Fadenaufnahmeteil 31 im Bereich um den Längsschlitz 32 herum eine Führungsfläche, längs welcher senkrecht zum Verlauf des Längsschlitzes 32 ein Schieber 35 verschoben werden kann. Der Schieber 35 wird in einer vom Saugrohr 3 getragenen Halterung 36 (Fig. 2) geführt, an welcher auch der Schwenkhebel 41 angelenkt ist. Der Schieber 35 ist durch eine sich an der Halterung 36 abstützende Druckfeder 360 in Schliessrichtung beaufschlagt. Mit dem Schieber 35 ist über einen Führungsbolzen 350 eine auch als Anschlag dienende Gabel 351, die einen als Rolle ausgebildeten Anschlag 352 trägt, verbunden. Der Schwenkhebel 41 trägt einen als Steuerkeil ausgebildeten Anschlag 410, der so am Schwenkhebel 41 angeordnet ist, dass der Anschlag 410 im letzten Teil der Bewegung des Saugrohres 3 aus seiner Fadenaufnahmestellung in die Ausgangsstellung auf der dem Schieber 35 zugewandten Seite des Anschlages 352 angreift und diese und somit auch den Schieber 35 soweit verschiebt, dass der Längsschlitz 32 freigegeben wird.The thread receiving part 31 has no cylindrical shape, since it has a mouth that extends over the entire bobbin width, so that no rotary slide valve can be used as the closure part as in the main part 30. Therefore, the thread receiving part 31 has a guide surface in the area around the longitudinal slot 32, along which a slide 35 can be displaced perpendicular to the course of the longitudinal slot 32. The slide 35 is guided in a holder 36 (FIG. 2) carried by the suction pipe 3, to which the pivot lever 41 is also articulated. The slide 35 is acted upon in the closing direction by a compression spring 360 supported on the holder 36. A fork 351, which also serves as a stop and carries a stop 352 designed as a roller, is connected to the slide 35 via a guide pin 350. The swivel lever 41 carries a stop 410 designed as a control wedge, which is arranged on the swivel lever 41 in such a way that the stop 410 engages in the last part of the movement of the suction pipe 3 from its thread take-up position into the starting position on the side of the stop 352 facing the slide 35 and this and thus also moves the slide 35 so far that the longitudinal slot 32 is released.

Um die Funktion des Erfindungsgegenstandes im Zusammenhand mit dem Arbeitsablauf beim Anspinnen - allerdings auf die wesentlichsten Schritte reduziert - erläutern zu können, werden nachstehend noch weitere Mittel der Anspinnvorrichtung 2 beschrieben. Diese Anspinnvorrichtung 2 weist u. a. einen Spulenabhebearm 21 auf, der schwenkbar gelagert ist und zur Anlage an den Spulenarm 14 gebracht werden kann.In order to be able to explain the function of the subject matter of the invention in conjunction with the workflow during piecing - but reduced to the most essential steps - further means of piecing device 2 are described below. This piecing device 2 has u. a. a spool lifting arm 21, which is pivotally mounted and can be brought into contact with the spool arm 14.

Die Anspinnvorrichtung 2 weist ferner ein Zubringerwalzenpaar 22 auf, das mit Hilfe eines Schwenkarmes 220 in der Weise schwenkbar gelagert ist, dass es bei seiner Schwenkbewegung den aus dem Saugrohr 3 ausgetretenen Faden 5 erfassen und genau bis oberhalb des Abzugsrohres 100 bringen kann.The piecing device 2 also has a pair of feed rollers 22, which is pivotably supported by means of a swivel arm 220 in such a way that when it swivels, it can grasp the thread 5 emerging from the suction pipe 3 and bring it exactly up to the take-off pipe 100.

Der Erfindungsgegenstand arbeitet wie folgt : Bei Auftreten eines Fadenbruches - der sowohl beim Abstellen der Maschine oder auch infolge eines Fehlers im Faden entstehen kann - gelangt das Ende des Fadens 5 auf die Spule 13. Der Fadenwächter 16 bewirkt bei dem hierbei entstehenden Abfall der Fadenspannung, dass die Faserspeisung in das Spinnelement abgestellt wird und das Spulenstützelement 18 die Spule 13 von ihrer Antriebswelle 15 abhebt.The subject matter of the invention works as follows: If a thread breakage occurs - which can occur both when the machine is switched off or as a result of a fault in the thread - the end of the thread 5 reaches the bobbin 13. The thread monitor 16 causes the thread tension to drop, that the fiber feed is placed in the spinning element and the bobbin support element 18 lifts the bobbin 13 from its drive shaft 15.

Die Anspinnvorrichtung 2 wird nun in bekannter Weise zu der betroffenen Spinnstelle gerufen, wo sie mit Hilfe des schwenkbaren Spulenabhebearmes 21 die Spule 13 vom Spulenstützelement 18 abhebt. Gleichzeitig wird das Saugrohr 3 in Richtung zur Spule 13 bis in deren unmittelbare Nähe verschwenkt. Dabei werden die Anschläge 333 und 352 durch die Anschläge 20 und 410 freigegeben, so dass der Schieber 35 sowie der Drehschieber 33 unter Einwirkung der Federn 34 und 360 den Längsschlitz 32 des Saugrohres 3 verschliessen. Der Anschlag 334 und die Gabel 351 gelangen dabei zur Anlage an den Anschlag 310 bzw. die Halterung 36. Gleichzeitig wird das Saugrohr 3 mit einer Unterdruckquelle verbunden, während die Spule 13 in nichtgezeigter Weise in Abwickelrichtung angetrieben wird. Hierbei erfasst der im Fadenaufnahmeteil 31 des Saugrohres 3 wirkende Saugluftstrom das Fadenende und zieht den durch Rückdrehen der Spule 13 freiwerdenden Faden 5 ins Saugrohr 3 hinein. Da der Längsschlitz 32 des Saugrohres 3 geschlossen ist, geht kein Unterdruck verloren, so dass der gesamte, am Saugrohr 3 anliegende Unterdruck an der Mündung seines Fadenaufnahmeteiles 31 wirksam wird. Wenn eine ausreichende Länge Faden 5 abgezogen ist - was auf bekannte Weise, beispielsweise durch die Anzahl Umdrehungen der Spule 13 oder ihres Antriebes in Abwickelrichtung gesteuert wird - wird das Saugrohr 3 aus seiner in Fig. 1 mit voller Linie dargestellten Fadenaufnahmestellung in seine Ausgangsstellung (gestrichelt dargestellt) zurückgeschwenkt. Dabei läuft der Anschlag 333 auf den in bezug auf die Anspinnvorrichtung 2 stationären Anschlag 20 auf, während der Anschlag 352 auf den vom Schwenkhebel 41 getragenen, als Steuerkeil ausgebildeten Anschlag 410 aufläuft, was, falls gewünscht, auch in zueinander zeitlich abgestufter Weise erfolgen kann. Durch dieses Auflaufen der Anschläge 333 und 352 wird der Längsschlitz 32 vom Schieber 35 und vom Drehschieber 33 freigegeben, die zusammen ein unterteiltes Verschlussstück bilden. Der Faden 5 tritt hierbei in dem Bestreben, den kürzesten Weg zwischen Spule 13 und dem der Spule 13 abgewandten Ende des Längsschlitzes 32 einzunehmen, aus dem Längsschlitz 32 aus, während das freie Fadenende sich bis in den Saufstutzen 4 hinein erstreckt und somit im Saugrohr 3 sicher gehalten wird. Der sich ausserhalb des Saugrohres. 3 befindliche Fadenabschnitt nimmt nun die Position 5' ein, in welcher er sich im Schwenkbereich des Zubringerwalzenpaares 22 befindet, das den Faden 5 durch Verschwenken erfasst und nach Durchtrennen mittels einer nichtgezeigten Trennvorrichtung dem Abzugsrohr 100 der Spinnvorrichtung 10 zuführt. Durch an sich bekannte Fadenleitorgane (nicht gezeigt) wird ein frühzeitiger Kontakt mit den Abzugswalzen 11/12 vermieden. Das abgetrennte Fadenende wird durch den im Saugrohr 3 wirkenden Unterdruck abgeführt. Durch Antreiben des sich oberhalb des Abzugsrohes 100 befindlichen Zubringerwalzenpaares 22 sowie der Spule 13 in Abwickelrichtung wird der Faden 5 bis zur Sammelfläche des einen Teil der Spinnvorrichtung 10 bildenden Spinnelementes (nicht gezeigt) zurückgeliefert, woraufhin durch Spreizen und Rückschwenken des Zubringerwalzenpaares 22 der Faden 5 freigegeben wird. Gleichzeitig werden die Faserspeisung in das Spinnelement auf bekannte Weise freigegeben und die Spule 13 durch Absenken des Spulenabhebearmes auf das Spulenstützelement 18 abgesenkt. Dieses wird nun zurückgezogen, so dass die Spule 13 wieder in Aufwickelrichtung angetrieben wird und der Faden 5 erneut in den Arbeitsbereich des Changierfadenführers 13 und aufgrund der wiederhergestellten Fadenspannung in die Klemmlinie der Abzugswalzen 11/12 gelangt. Die Saugluft im Saugrohr 3 wird nun auch abgestellt. Der Anspinnvorgang ist somit abgeschlossen.The piecing device 2 is now called in a known manner to the spinning station concerned, where it lifts the bobbin 13 from the bobbin support element 18 with the aid of the pivotable bobbin lifting arm 21. At the same time, the suction pipe 3 is pivoted in the direction of the coil 13 up to its immediate vicinity. The stops 333 and 352 are released by the stops 20 and 410, so that the slide 35 and the rotary slide 33 close the longitudinal slot 32 of the suction pipe 3 under the action of the springs 34 and 360. The stop 334 and the fork 351 come to rest against the stop 310 or the holder 36. At the same time, the suction pipe 3 is connected to a vacuum source, while the coil 13 is driven in a manner not shown in the unwinding direction. The suction air flow acting in the thread receiving part 31 of the suction tube 3 detects the thread end and pulls the thread 5 released by turning the spool 13 back into the suction tube 3. Since the longitudinal slot 32 of the suction pipe 3 is closed, no negative pressure is lost, so that the entire negative pressure applied to the suction pipe 3 becomes effective at the mouth of its thread-receiving part 31. When a sufficient length of thread 5 has been drawn off - which is controlled in a known manner, for example by the number of revolutions of the bobbin 13 or its drive in the unwinding direction - the suction tube 3 is moved from its thread take-up position shown in full line in FIG. 1 to its starting position (dashed lines) shown) pivoted back. The stop 333 runs onto the stop 20 which is stationary with respect to the piecing device 2, while the stop 352 runs onto the stop 410, which is carried as a control wedge and is carried by the swivel lever 41, which, if desired, can also be done in a time-graded manner. Through this run-up of the stops 333 and 352, the longitudinal slot 32 is released by the slide 35 and by the rotary slide 33, which together form a divided closure piece. The thread 5 emerges from the longitudinal slot 32 in an attempt to take the shortest path between the bobbin 13 and the end of the longitudinal slot 32 facing away from the bobbin 13, while the free end of the thread extends into the drinking spout 4 and thus in the suction pipe 3 is kept safe. The outside of the intake manifold. 3 located thread section now takes the position 5 ', in which it is located in the pivoting range of the pair of feed rollers 22, which detects the thread 5 by pivoting and after cutting by means of a not shown Separating device feeds the exhaust pipe 100 of the spinning device 10. Known thread guide members (not shown) prevent premature contact with the take-off rollers 11/12. The separated thread end is removed by the vacuum acting in the suction pipe 3. By driving the feed roller pair 22 located above the draw-off tube 100 and the spool 13 in the unwinding direction, the thread 5 is returned to the collecting surface of the spinning element (not shown) forming part of the spinning device 10, whereupon the thread 5 is released by spreading and pivoting back the feed roller pair 22 becomes. At the same time, the fiber feed into the spinning element is released in a known manner and the bobbin 13 is lowered onto the bobbin support element 18 by lowering the bobbin lifting arm. This is now withdrawn so that the bobbin 13 is driven again in the winding direction and the thread 5 again enters the working area of the traversing thread guide 13 and, due to the restored thread tension, into the clamping line of the take-off rollers 11/12. The suction air in the suction pipe 3 is now also turned off. The piecing process is now complete.

Das Verschlussstück kann, wie die vorstehende Beschreibung zeigt, unterschiedlich ausgebildet sein. Seine Form hängt auch weitgehend von der Form des Saugrohres 3 ab. Es kann so z. B. ein einziges Verschlussstück vorgesehen sein, das sich über die gesamte Länge des Längsschlitzes 32 erstreckt.The closure piece can, as the above description shows, be designed differently. Its shape also largely depends on the shape of the suction pipe 3. It can e.g. B. a single closure piece may be provided, which extends over the entire length of the longitudinal slot 32.

Es ist nicht erforderlich, dass dieses Hauptteil 30 Zylinderform aufweist; andere achssymmetrische Formen, z. B. Kegel mit geringer Konizität oder zusammengesetzte Körper mit kreisförmigen Querschnitten, sind ebenfalls möglich. Bei dieser achssymmetrischen Form ist die Ausbildung des Verschlussstückes als Drehschieber 33 - mit einem Axialschlitz 330 - möglich, was Vorteile hinsichtlich der Fertigung, der Lagerung und der Führung am Saugrohr 3 mit sich bringt.This main part is not required to have a cylindrical shape; other axisymmetric shapes, e.g. B. cone with low taper or composite body with circular cross sections are also possible. With this axisymmetric shape, the design of the closure piece as a rotary slide 33 - with an axial slot 330 - is possible, which has advantages in terms of manufacture, storage and guidance on the intake manifold 3.

Bei der gezeigten Ausbildung des Erfindungsgegenstandes ist der Drehschieber 33 als ein den Hauptteil 30 des Saugrohres 3 umgebender Mantel ausgebildet, da es dann besonders einfach ist, den Drehschieber 33 zu betätigen. Prinzipiell ist es jedoch auch möglich, den Drehschieber 33 innerhalb des Saugrohres 3 anzuordnen und Betätigungsorgane am Drehschieber 33 vorzusehen, die durch Umfangsschlitze im Saugrohr 3 nach aussen ragen, so dass der Drehschieber in der geschilderten Weise betätigt werden kann.In the embodiment of the subject matter shown, the rotary slide 33 is designed as a jacket surrounding the main part 30 of the suction pipe 3, since it is then particularly easy to actuate the rotary slide 33. In principle, however, it is also possible to arrange the rotary valve 33 within the intake manifold 3 and to provide actuators on the rotary valve 33 which protrude outwards through circumferential slots in the intake manifold 3, so that the rotary valve can be actuated in the manner described.

Die Steuerung des Verschlussstückes (Schieber 35 und/oder Drehschieber 33) kann auf verschiedene Weise durch einen stationären Anschlag 20 oder durch einen am Gestänge des Saugrohres 3 angeordneten Anschlag 410 erfolgen, der durch die Schwenkbewegung des Saugrohres 3 wirksam wird ; es ist aber auch möglich, für die Verstellung des Verschlussstückes andere Antriebe vorzusehen. Dieser kann dabei in beiden Richtungen auf das Verschlussstück einwirken, z. B. in Form eines Elektromagneten oder eines hydraulischen oder pneumatischen Kolbens. Es ist aber auch möglich, dass der Antrieb nur eine Bewegung steuert und dass das Verschlussstück (Schieber 35, Drehschieber 33) durch eine Feder (34, 360) oder ein anderes elastisches Element beaufschlagt ist, das das Verschlussstück bei Freigabe durch seinen Antrieb (z. B. Anschläge 20 und 410) in Anlage an einen Anschlag (310 bzw. Gabel 351) hält. Diese Stellung entspricht dann der Schliessstellung des Verschlussstückes. Dieses elastische Element kann dann in beliebiger Weise zwischen dem Saugrohr 3 und dem Schieber 35 bzw. Drehschieber 33 angebracht sein, z. B. als Druckfeder oder Zugfeder zwischen Auslegearmen oder als Torsionsfeder etc.The closure piece (slide 35 and / or rotary slide 33) can be controlled in various ways by a stationary stop 20 or by a stop 410 arranged on the linkage of the suction pipe 3, which is activated by the pivoting movement of the suction pipe 3; but it is also possible to provide other drives for the adjustment of the closure piece. This can act on the closure piece in both directions, for. B. in the form of an electromagnet or a hydraulic or pneumatic piston. But it is also possible that the drive controls only one movement and that the closure piece (slide 35, rotary slide 33) is acted upon by a spring (34, 360) or another elastic element which, when released by its drive (e.g. B. stops 20 and 410) abut against a stop (310 or fork 351). This position then corresponds to the closed position of the closure piece. This elastic element can then be attached in any way between the suction pipe 3 and the slide 35 or rotary slide 33, z. B. as a compression spring or tension spring between extension arms or as a torsion spring etc.

Um bei der Verstellung des Verschlussstückes nicht den Hubweg durch Anschläge, elastische Übertragungselemente etc. begrenzen zu müssen, ist gemäss Fig. 2 vorgesehen, dass der Axialschlitz 330 im Drehschieber 33 breiter ist als der Längsschlitz 32 im Saugrohr 3. Bei einer derartigen Ausführung werden - ebenso wie bei einem geradlinig bewegbaren Schieber 35 - keine besonderen Anforderungen an die Toleranzen gestellt, da lediglich sichergestellt sein muss, dass in der einen Stellung des Verschlussstückes der Längsschlitz 32 geschlossen ist, während dieser in der anderen Stellung des Verschlussstückes freigegeben sein muss.2 so that the axial slot 330 in the rotary slide 33 is wider than the longitudinal slot 32 in the intake manifold 3. In such an embodiment, in order to avoid having to limit the stroke by stops, elastic transmission elements, etc., when adjusting the closure piece, as with a linearly movable slide 35 - no special requirements are placed on the tolerances, since it only has to be ensured that the longitudinal slot 32 is closed in one position of the closure piece, while this must be released in the other position of the closure piece.

Da der Faden 5 während der Bewegung des Verschlussstückes an dessen der Spule 13 zugewandten Kante anliegt, besteht die Gefahr, dass der Faden 5 bei der Stellbewegung des Verschlussstückes mitgenommen und dabei in dem Schlitz zwischen Verschlussstück (Schieber 35 bzw. Drehschieber 33) und Saugrohr 3 (Fadenaufnahmeteil 31 bzw. Hauptteil 30) eingeklemmt wird. Um dies mit Sicherheit zu vermeiden, ist gemäss den Fig. 3 und 4 vorgesehen, dass das Verschlussstück in einer Nut 37 oder 38 gelagert ist. Für den Schieber 35 wird diese Nut 38 durch Umstülpen der Mündung des Fadenaufnahmeteils 31 gebildet, so dass der Schieber 35 zwischen dem Fadenaufnahmeteil 31 selber und der Umstülpung 311 geführt wird. Für den Drehschieber 33 ist diese Nut 37 zwischen dem drehfest mit dem Fadenaufnahmeteil 31 verbundenen Hauptteil 30 des Saugrohres 3 und einem ringförmigen Vorsprung 312 des Fadenaufnahmeteiles 31 ausgebildet. Selbstverständlich sind sowohl die Umstülpung 311 als auch der ringförmige Vorsprung 312 in Übereinstimmung mit dem Längsschlitz 32 des Saugrohres 3 ebenfalls geschlitzt.Since the thread 5 abuts the edge of the bobbin 13 facing the bobbin 13 during the movement of the breech block, there is a risk that the thread 5 will be carried along during the actuating movement of the breech block and thereby in the slot between the breech block (slide 35 or rotary slide valve 33) and suction pipe 3 (Thread take-up part 31 or main part 30) is clamped. In order to avoid this with certainty, it is provided according to FIGS. 3 and 4 that the closure piece is mounted in a groove 37 or 38. For the slide 35, this groove 38 is formed by turning the mouth of the thread receiving part 31 inside out, so that the slide 35 is guided between the thread receiving part 31 itself and the inside out 311. For the rotary slide valve 33, this groove 37 is formed between the main part 30 of the suction tube 3, which is non-rotatably connected to the thread take-up part 31, and an annular projection 312 of the thread take-up part 31. Of course, both the inverted portion 311 and the annular projection 312 are also slotted in accordance with the longitudinal slot 32 of the suction pipe 3.

Wenn der Faden 5 auf dem der Spule 13 zugewandten Ende des Verschlussstückes (Schieber 35 bzw. Drehschieber 33) aufliegt, so wird der Faden 5 beidseitig des Verschlussstückes durch das Fadenaufnahmeteil 31 sowie seiner Umstülpung 311 bzw. das Hauptteil 30 des Saugrohres 3 und dem Vorsprung 312 des Fadenaufnahmeteiles 31 geführt. Wird somit das Verschlussstück relativ zum Saugrohr 3 bewegt, so wird der Faden 5 durch diese beidseitige Führung vom Verschlussstück gehindert, der Bewegung des Verschlussstückes zu folgen, wodurch auch ein Einklemmen des Fadens 5 zwischen Verschlussstück und Saugrohr 3 verhindert wird. Da bei der Übernahme des sich in der Position 5' befindlichen Fadens 5 durch das Zubringerwalzenpaar 22 der Faden 5 durchtrennt und das abgetrennte Fadenende abgeführt wird, kann auch beim Schliessen des Längsschlitzes 32 der Faden 5 durch das Verschlussstück nicht eingeklemmt werden.If the thread 5 rests on the end of the closing piece (slide 35 or rotary slide 33) facing the bobbin 13, the thread 5 becomes on both sides of the closing piece by the thread receiving part 31 and its inverted portion 311 or the main part 30 of the suction tube 3 and the projection 312 of the thread receiving part 31 out. Thus, if the closure piece is moved relative to the suction pipe 3, the thread 5 is prevented by the closure piece by this guide on both sides, the movement of the Ver to follow the closing piece, thereby also preventing the thread 5 from becoming jammed between the closing piece and the suction pipe 3. Since the thread 5 is severed and the separated thread end is removed when the thread 5 in position 5 'is taken over by the feed roller pair 22, the thread 5 cannot be pinched by the closure piece even when the longitudinal slot 32 is closed.

Neben den genannten Vorteilen der Platz-, Unterdruck- und Zeitersparnis bietet der Erfindungsgegenstand noch den Vorteil, dass der Faden 5 nicht zu einem ungewünschten Zeitpunkt freigegeben ist und durch äussere Einflüsse aus dem Saugrohr 3 herausgezogen oder somit irgendwie beeinträchtigt werden kann, da er erst, wenn er von einem anderen Arbeitsorgan übernommen werden soll, durch Freigabe des Längsschlitzes 32 dem Arbeitsbereich dieses Arbeitsorganes zugeführt wird.In addition to the above-mentioned advantages of saving space, negative pressure and time, the subject matter of the invention also offers the advantage that the thread 5 is not released at an undesired point in time and can be pulled out of the suction pipe 3 by external influences or can thus be somehow impaired because it if it is to be taken over by another work organ, is released to the working area of this work organ by releasing the longitudinal slot 32.

Claims (8)

1. Device for gripping a yam from a spool and for transferring it to an operating element, especially for returning the yarn to the withdrawal tube of a spinning station of an open-end spinning machine, by means of a suction pipe comprising a yarn suction nozzle, the suction pipe having in its longitudinal direction a slot on its side towards the spool, for the passage of a sucked-in yarn, which slot is adapted to be closed by means of a controllable closure member, characterized by the fact that the suction (3) is pivotable and that the closure member (33, 35) is subdivided and is formed as a slide which is movable transversely of the longitudinal slot (32), which slide in its closure position covers essentially the whole length of the longitudinal slot (32) and releases the yam by its movement into its opening position.
2. Device according to claim 1, wherein the suction pipe (3) has a tube section (30) which is of a shape symmetrical about its axis, and the closure member near the tube section (30) is constituted as a rotary slide having an axial slot (330).
3. Device according to claim 2, wherein the rotary slide (33) surrounds the tube section (30).
4. Device according to claim 2 or 3, wherein the axial slot (330) in the rotary slide (33) is wider than the longitudinal slot (32) in the tube section (30).
5. Device according to any of claims 1 to 4, wherein the end of the closure member nearest the spool (13) is mounted in a groove (37, 38) of the suction pipe (3).
6. Device according to any of claims 1 to 5, wherein the closure member is acted on by a resilient element (34, 360), which holds the closure member in its closure position by a stop (310, 351).
7. Device according to any of claims 1 to 6, wherein the closure member carries a stop (333, 352) with which there is associated a counterabut- ment (20, 410) which becomes operative in dependence on the pivotal movement of the suction pipe (3).
8. Device according to any of claims 1 to 7, where the suction pipe (3) has a thread gripping portion (31) with a section in the form of a slot, which thread gripping portion faces the spool, and a rectilinearily movable slide (35), and which suction pipe (3) has, at an angle to the thread gripping potion (31), a main portion (30) having a section which is symmetric with respect to its axis, and a rotary slide (33), the slide (35) and the rotary slide (33) being controlled in dependence on a pivotal movement of the suction pipe (3).
EP82102807A 1981-06-12 1982-04-02 Hinging suction pipe for gripping a yarn from a spool Expired EP0067279B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3123282 1981-06-12
DE3123282A DE3123282C1 (en) 1981-06-12 1981-06-12 Device for picking up a thread from a bobbin and transferring it to a working organ

Publications (3)

Publication Number Publication Date
EP0067279A1 EP0067279A1 (en) 1982-12-22
EP0067279B1 EP0067279B1 (en) 1985-07-24
EP0067279B2 true EP0067279B2 (en) 1989-06-07

Family

ID=6134512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102807A Expired EP0067279B2 (en) 1981-06-12 1982-04-02 Hinging suction pipe for gripping a yarn from a spool

Country Status (10)

Country Link
US (1) US4463548A (en)
EP (1) EP0067279B2 (en)
JP (1) JPS57209174A (en)
BR (1) BR8203403A (en)
CS (1) CS274258B2 (en)
DE (1) DE3123282C1 (en)
GB (1) GB2100298B (en)
HK (1) HK42385A (en)
IN (1) IN156433B (en)
MY (1) MY8600113A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH663428A5 (en) * 1983-05-21 1987-12-15 Schlafhorst & Co W METHOD AND DEVICE FOR STARTING UP A FRICTION SPINDING MACHINE.
CS257672B1 (en) * 1986-03-03 1988-05-16 Frantisek Burysek Device for yarn spinning-in on spindleless spinning frame
DE102014012419A1 (en) * 2014-08-21 2016-02-25 Saurer Germany Gmbh & Co. Kg Workplace of a cheese-producing textile machine
EP3489399B1 (en) * 2017-11-27 2021-06-09 Savio Macchine Tessili S.p.A. Open-end type spinning machine with enhanced intake nozzle unit and relative piecing method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432722A (en) * 1945-07-12 1947-12-16 Foster Machine Co Winding machine
US3136494A (en) * 1956-10-18 1964-06-09 Reiners Walter Method and means for preparing spinning cops for rewinding
US3077312A (en) * 1959-06-12 1963-02-12 Reiners Walter Yarn-coil winding machine
US3131879A (en) * 1961-07-13 1964-05-05 Glastra Yarn winding machine
US3343756A (en) * 1964-09-01 1967-09-26 Hayashi Junichi Suction means for retrieving a yarn end from a supply cop for automatic winding machines
US3595493A (en) * 1967-08-19 1971-07-27 Kamitsu Seisakusho Ltd Device for use with yarn clearer automatic winders
AT306585B (en) * 1967-09-09 1973-04-10 Elitex Zavody Textilniho Service facility for automatic winding machines
GB1175929A (en) * 1967-11-04 1970-01-01 Harilaos Theochari Hadjikokolo Transportation Apparatus for Bulk Liquids
CH508745A (en) * 1969-02-25 1971-06-15 Toyoda Automatic Loom Works Process for the automatic piecing of a thread after a thread break at a spinning station of a ringless spinning machine and spinning machine for its implementation
JPS4926496U (en) * 1972-06-07 1974-03-06
JPS5130953Y2 (en) * 1972-06-08 1976-08-03
DE2620805C2 (en) * 1976-05-11 1986-02-13 W. Schlafhorst & Co, 4050 Mönchengladbach Method and device for piecing a thread
DE2647048A1 (en) * 1976-10-19 1978-04-27 Schlafhorst & Co W DEVICE FOR RETURNING THE THREAD END OF A RECOVERY REEL TO THE DISCHARGE TUBE OF A ROTOR SPINNING MACHINE
JPS5621715A (en) * 1979-07-20 1981-02-28 Seiko Seiki Co Ltd Beveling device
JPS57121566A (en) * 1981-01-19 1982-07-29 Murata Mach Ltd Spun-yarn joining device

Also Published As

Publication number Publication date
BR8203403A (en) 1983-05-31
CS274258B2 (en) 1991-04-11
EP0067279B1 (en) 1985-07-24
GB2100298A (en) 1982-12-22
EP0067279A1 (en) 1982-12-22
JPS57209174A (en) 1982-12-22
HK42385A (en) 1985-06-07
DE3123282C1 (en) 1988-12-22
IN156433B (en) 1985-08-03
CS435582A2 (en) 1990-09-12
GB2100298B (en) 1984-11-14
US4463548A (en) 1984-08-07
MY8600113A (en) 1986-12-31

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