EP2824054B1 - Workstation of a textile machine for creating cross-wound spools - Google Patents

Workstation of a textile machine for creating cross-wound spools Download PDF

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Publication number
EP2824054B1
EP2824054B1 EP14002016.5A EP14002016A EP2824054B1 EP 2824054 B1 EP2824054 B1 EP 2824054B1 EP 14002016 A EP14002016 A EP 14002016A EP 2824054 B1 EP2824054 B1 EP 2824054B1
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EP
European Patent Office
Prior art keywords
suction nozzle
suction
sealing element
thread
contact roller
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EP14002016.5A
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German (de)
French (fr)
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EP2824054A1 (en
Inventor
Ute Holt
Alexander Marx
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.)
Saurer Spinning Solutions GmbH and Co KG
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Saurer Germany GmbH and Co KG
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Publication of EP2824054A1 publication Critical patent/EP2824054A1/en
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    • 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 invention relates to a workplace of a cross-wound textile machine with a suction nozzle according to the preamble of claim 1.
  • a workstation computer in such a case ensures that, such as in the DE 40 05 752 A1 is described in relative detail, first a so-called suction nozzle with its mouth is applied to the surface of the slowly rotating against the winding direction of package and subjected to negative pressure. The vacuum-loaded suction nozzle then attempts with its mouth to receive the yarn end of the upper thread from the surface of the package designed as a cross-wound bobbin.
  • the suction nozzle pivots back to its original position, in which the mouth of the suction nozzle is positioned below a yarn joining device.
  • the yarn strand extending between the cross-wound bobbin and the suction nozzle is guided into a scissors-mounted electronic cleaner, a clamping and cutting device positioned in this region and, guided by corresponding guide contours of Fadenleitblechen and Fadenleitbügeln, in a pair of scissors located below the thread connecting device cutting device moved in.
  • a so-called gripper tube positioned in a lower starting position pivots into an upper working position, bringing with it a lower thread that has been held, for example, in a thread tensioner and withdrawn from the supply spool.
  • the gripper tube in its upper working position slides the lower thread, which also on corresponding thread guiding contours is guided in an open thread clamp and an open cutting device.
  • the lower and upper threads are then cut to the correct length, prepared in so-called dissolution tubes and pneumatically connected to one another in the thread connecting device.
  • a job of a winder which is equipped with a fixed, that is, not pivotally mounted suction nozzle.
  • the suction nozzle has on the top of its mouth region on a neck which is connected via a lever arrangement with the pivotally mounted creel of the job so that it adapts to the diameter of the package, that is, for effective thread detection reaches close to the surface of the package without touching the surface.
  • the DE 29 08 731 B refers in principle to a further development of the suction nozzle described above. That is, the fixed suction nozzle described in this patent literature has on the top of its mouth region also a slidably mounted approach to which, however, no mechanical drive means is connected to its positioning in a suction position, but only two small return springs. If necessary, the positioning of the sealing element in its suction position should be carried out pneumatically by the pressure prevailing in the suction nozzle negative pressure, with which the suction nozzle is acted upon in the event of a yarn breakage.
  • This movable or displaceably mounted device is in the recording of accumulated on the surface of the take-up spool yarn end of the upper thread on the surface of the take-up spool, thereby mechanically assisting the yarn loosening.
  • the take-up spool itself is lifted off during the thread take-up of its contact roller, which is usually designed as a so-called yarn guide drum and is rotated by the auxiliary drive means of the piecing in the unwinding.
  • Even with the use of such in itself proven piecing often considerable problems arise when the accumulated on the package reel yarn end strongly infiltrated in the surface of the usually designed as a cheese package casserole and / or the yarn to be processed is relatively hairy. That is, the suction nozzles of these known piecing units often have great difficulty in difficult operating conditions to reliably pick up the upper thread from the surface of a package.
  • a workstation of a winding machine which is equipped with a permanently installed suction nozzle whose lip-like mouth region is curved slightly upwards on its underside and ends just below the surface of a rotatably mounted in a pivoting creel cheese.
  • the mouth region of this suction nozzle also has a plurality of openings through which additional air is sucked in with vacuum-loaded suction nozzle, whereby the suction effect is to be improved.
  • the DE 32 06 478 C discloses a job with a pivotally mounted, under-pressurizable suction nozzle, which is equipped in its mouth with additional compressed air nozzles. If necessary, an additional air flow in the direction of the negative pressure flow of the suction nozzle can be initiated via the compressed air nozzles.
  • a suction nozzle which is not open, as usual with suction nozzles, towards the front, but has in its front region on its upper side a transverse opening slot.
  • a cap Above the opening slot, a cap is installed, which is designed so that a sucked thread is deflected several times immediately. This multiple deflection of the thread is to ensure that a looped thread is kept sufficiently tight during its transport and threading in a Fadensverlißvorraum.
  • Textile machines producing modern cheeses are known to often have contact rollers, for example in the form of thread guide drums, in the area of their workstations as cross-wound bobbin drive and thread changer devices.
  • contact rollers for example, after a yarn breakage, an unwanted slipping of the thread end of the surface of the cheese or to allow for a successful thread splicing a problem-free, re-insertion of the thread in the groove of the thread guide drum
  • these contact rollers are usually equipped with so-called sliding and deflector plates.
  • sliding and Abweisbleche each include the individual contact rollers partially and form good yarn guide means.
  • the sliding and Abweisbleche also prevent that the suction nozzle can be positioned in the upper thread receiving in a fluidically optimal receiving position. That is, when using such sliding and Abweisbleche in the contact roller so far, especially in difficult operating conditions, problems in receiving the upper thread are often difficult to avoid.
  • the present invention seeks to propose a job of a cheese-producing textile machine, the suction nozzle cooperates with suitable means so that one on the Cross reel accumulated yarn end of an upper thread, even in difficult operating conditions, such as hairy yarns, reliable and energy-saving can be added.
  • a work station with a suction nozzle which cooperates with a shielding device which prevents a suction air flow, which is introduced from below into the suction opening of the suction nozzle when the suction nozzle is positioned in the suction receiving position, under the suction nozzle produces a suction air flow, which has the advantage that it leads to an advantageous concentration of the suction air flowing into the suction nozzle comes. That is, the device arranged below the suction opening of the suction nozzle prevents the formation of a suction air flow even below the suction nozzle, with the result that the suction air stream flowing into the suction nozzle from above becomes more intense.
  • Such intensification of the suction air stream flowing in from above has a very positive effect on the detachment of the thread end from the surface of the cross-wound bobbin and the subsequent thread take-up.
  • the energy requirement of the suction nozzle can also be optimized. That is, either while maintaining the current energy consumption of the suction nozzle whose error rate at the thread end recording can be significantly reduced and / or the power consumption of the suction nozzle can be significantly reduced, without causing an increase in the number of failed attempts of the suction nozzle at the yarn end.
  • the shielding at positioned in the thread receiving position suction nozzle on the contact roller.
  • suction air flow flowing in from above there are also two lateral suction air flows, which ensure that even thread ends which are located in the face region of the cheese surface can be reliably sucked into the region of the inlet opening of the suction nozzle and subsequently taken up.
  • the shielding device has a sealing element which is installed on the underside of the Saugdüsenkopfes so that it corresponds with positioned in the thread receiving position of the suction nozzle with a arranged below the suction nozzle roller drive roller.
  • a sealing element can be prevented in a simple manner that it comes below the suction nozzle for the emergence of a directed in the unwinding, lower Saugluftströmung.
  • Such oriented lower suction air flow is negative in connection with the thread take-up by a suction nozzle, since the thread end is acted upon by such a lower suction air flow in the sense "create" on the surface of the cheeses, which makes the thread take much more difficult.
  • the shielding device has a hinged sealing element, which may be inexpensively formed as injection molded or die-cast, for example.
  • This hinged sealing element is preferably designed and arranged below the suction nozzle that, on the one hand, it bears against the contact roller arranged below the cross-wound contact roller and, on the other hand, neither during pivoting of the suction nozzle into the yarn end receiving position, nor later during the pivoting of the suction nozzle with deflecting and threading contours that are installed in the area of the job in front of the contact roller. Due to the chosen training and arrangement The sealing element is thus ensured that the sealing element can always create problems with the contact roller when positioned in Fadenendamwolf suction nozzle.
  • the hinged sealing element is acted upon by a spring means that on the one hand always rests reliably on the contact roller, on the other hand is mounted so pivotally that it is on or when swinging the suction nozzle, depending on Demand, temporarily can swing away to the rear or temporarily forward.
  • the hinged sealing element as described in claim 6, also be designed so that it is applied to the contact roller by gravity due to positioned in Fadenendage sued suction nozzle.
  • Such a design represents a very cost-effective variant of the storage of a pivotable sealing element.
  • the shielding device is designed as an elastic sealing element.
  • the suction nozzle elastic sealing element as set forth in claim 8, preferably designed as rubber elastic sealing lip, can be ensured on the one hand in a relatively simple manner that when positioned in Fadenending sued suction nozzle, the space between the suction nozzle and contact roller always As far as possible is closed and thus the emergence of a lower suction air flow is reliably prevented in this area, on the other hand, by such elastic sealing lip and the pivoting in and out of the suction nozzle in any way adversely affected.
  • the workstation of the cheese-producing textile machine has a suction nozzle with an associated separate shielding.
  • a separate shielding device preferably has a movably mounted, if necessary between the suction nozzle and the contact roller positionable sealing element, which, in its operating position on the Contact roller positioned, also reliably prevents the emergence of a suction air flow between the suction port of the suction nozzle and the contact roller.
  • the movably mounted sealing element of the shielding device can, for example, be positioned in a defined manner between the suction nozzle and the contact roller by means of a controllable drive device. It is important in this context only that the sealing element of the shielding on the one hand during normal winding operation is positioned so that the winding operation of the job is not hindered, on the other hand reliably positioned in Fadenendamwolf suction nozzle is in a position in which it is ensured that below the suction nozzle can not form a lower Saugluftströmung.
  • Fig. 1 is a side view schematically a job 2 of a cheese-producing textile machine, in the embodiment of a so-called cross-winding machine 1, shown.
  • spinning workpieces 3 which have been produced, for example, on ring spinning machines and have relatively little yarn material, are rewound into large-volume cheeses 5 on the workstations 2 of such automatic winder 1.
  • the cheeses 5 are after their completion by means of a (not shown) automatically operating service unit, for example, a so-called cheese change, handed over to a machine-length cheese package conveyor 7 and then transported to a machine end side Spulenverladestation or the like.
  • such automatic packages 1 also have a logistics device in the form of a package and tube transport system 6.
  • a logistics device in the form of a package and tube transport system 6.
  • this bobbin and tube transport system 6 run on transport plates 11 spinning cops 3 and Empty tubes 34 um.
  • From the sleeve transport system 6 are in the Fig. 1 only the Kopszu slaughterhouse 24, the reversibly driven storage section 25, one of the leading to the winding units 2 transverse transport sections 26 and the sleeve return path 27 shown.
  • each workstation 2 of the automatic winder 1 has a workstation computer 28, which is connected via a bus connection 29 to a central control unit 30 of the automatic cheese winder 1, as well as various other devices which are necessary for the proper operation of such workstations 2.
  • a winding device 4 has a coil frame 8 which is movably mounted about a pivot axis 12. As in Fig. 1 shown, is in the coil frame 8 freely rotatably supported cross-wound bobbin 5 during the winding operation with its surface on a contact roller 9.
  • a contact roller may, for example, as in Fig.1 shown, a coil drive roller 9, which is acted upon for example by an electric motor 33.
  • the electric motor 33 is connected, for example via a control line 35, also to the workstation computer 28.
  • the coil frame 9, as known per se, could also be equipped directly with a cheese drive. In such a case, the rotating cross-wound bobbin 5 would rest on a so-called support roller and drive it frictionally.
  • Fadenchangier listening 10 For traversing the thread 16 during the winding process a Fadenchangier listening 10 is provided.
  • Fadenchangier stimulating 10 consists for example of a finger thread guide 13, which, acted upon by an electric motor drive 14, traversing the accumulating on the cheese 5 thread 16 between the end faces of the cheese 5 traversed. Via a control line 15 and the thread guide drive 14 is connected to the workstation computer 28 in connection.
  • a so-called thread guide drum can also be used.
  • a thread connecting device 42 preferably a pneumatic yarn splicing device, a gripper tube 43 for handling a lower thread and a suction nozzle 17, with which an accumulated on the cheese 5 top thread can be added and inserted into the thread connecting device 42.
  • the suction nozzle 17 is preferably, as described below with reference to FIGS. 2 and 3 will be explained, equipped with a below the suction port 18 of the suction nozzle 17 installed shielding 19A and 19B, which prevents at positioned in Fadenendam ein suction nozzle 17 with its sealing element 22A and 22B prevents that between the suction nozzle 17 and the contact roller 9, a lower Saugluftströmung SLSu may arise, which would flow from below into the suction port 18 of the suction nozzle 17.
  • FIG. 4 An alternative embodiment of a shielding device is in Figure 4 shown.
  • a separate shielding device 22C is provided in the area of the workstation 2, the movably mounted sealing element 22C of which can be positioned below the suction opening 18 of the suction nozzle 17 if required and, positioned in this position, also prevents the formation of a suction air flow SLSu.
  • the suction nozzle 17 is equipped with a shielding device 19A which has a movably mounted sealing element 22A.
  • the preferably by means of conventional fasteners on the underside 20 of the Saugdüsenkopfes 31 defined sealing element 22A is thereby, for example, by a spring element 21, so acted that it can dodge as required in the case of pivoting the suction nozzle 17 in its / from its Fadenendamyak. That is, the suction nozzle 17 can easily pass the deflecting and threading contours 32 arranged in front of the contact roller 9.
  • the spring element 21 also provides ensure that when positioned in the thread take-up position suction nozzle 17, the sealing element 22A always reliably applied to the slowly in the unwinding R from rotating contact roller 9.
  • the positioned in the thread receiving position of the suction nozzle 17 on the contact roller 9, for example, a coil drive roller, fitting sealing element 22A reliably prevents that, as usual in the prior art (see Figure 5 ), below the suction nozzle 17, that is, between the Saugdüsenkopf 31 and the contact roller 9, a lower Saugluftströmung SLSu may arise, which, as already explained above, the flow conditions in the suction port 18 of the Saugdüsenkopfes 31 of the suction nozzle 17 would adversely affect.
  • the sealing element 22A positioned on the contact roller 9 causes the suction air flow SLS present in the interior of the suction nozzle 17 to initiate a relatively strong upper suction air flow SLSo.
  • This on the surface of slowly rotating in the unwinding AW cross-wound bobbin 5 along sweeping Saugluftströmung SLSo on the one hand promotes the detachment of the thread end of the surface of the cheese 5 and on the other hand ensures that the detached upper thread is securely sucked into the suction nozzle 17.
  • the upper thread sucked into the suction nozzle 17 can then be safely transferred by the downwardly pivoting suction nozzle 17 to the workstation's own pneumatic thread connecting device 42.
  • a gravitational alignment of the sealing element 22A may be provided instead of the above-described spring element 21, which acts on the sealing element 22A. That is, the sealing element 22A is then arranged on the underside 20 of the Saugdüsenkopfes 31, that a freely movable part of the sealing element 224 gravity causes down and rests on the contact roller 9 when positioned in Fadenendam sued suction nozzle 17.
  • the finger thread guide 13 of the Fadenchangier worn 10 is shown in each case in a safety position.
  • the finger thread guide 13 in order to avoid a collision with the suction nozzle 17 pivoting into the yarn end receiving position, is positioned in each case in an outer end position.
  • the finger thread guide 13 of the thread switching device 10 is understood, as in Fig.1 shown, above the deflecting and Einfädelkonturen 32 active and traversing the auf securedden Faden16 over the surface of the cheese 5.
  • the Figure 3 shows a shielding device 19B, which in its function as the above with reference to the Fig.2 Shielding device 19A described corresponds.
  • the shielding device 19B is also arranged on the underside 20 of the suction nozzle head 31.
  • the sealing element 22B of the shielding device 19B is now made of an elastic material, for example a rubber material.
  • the elastic sealing element 22B as already explained above in connection with the shielding 19A, when dipping or swiveling the suction nozzle 17 easily avoid the installed in front of the contact roller 9 deflecting and threading contours 32.
  • alternative shielding 19C has a separately arranged sealing element 22C, which can be positioned below the suction nozzle 17, if necessary, for example by a drive device 23, that between the suction nozzle 17 and the contact roller 9 reliably prevents the emergence of a lower Saugluftströmung SLSu becomes.
  • shielding 19C are numerous, sometimes quite different embodiments conceivable.
  • the separate sealing element 22C could, for example, be pushed by a drive device 23 from above into its working position on the contact roller 9. However, it is also conceivable that the sealing element 22C is swiveled in as required by a drive device 23. It is conceivable, for example, that the sealing element 22C is formed in two parts. In such a case, the two individual elements could each be pivoted from the side into its working position on the contact roller 2.
  • a shielding device 19C with a separate sealing element 22c is ultimately not final, as such a shielding is precisely formed, but it is only important that the sealing element 22C of the shielding 19C can be positioned during the winding operation so that the winding operation in any way is negatively influenced and that is ensured in the operating position of the sealing element 22C that the sealing element 22 is positioned at the yarn end receiving so that the emergence of a lower Saugluftströmung SLSu is reliably prevented.

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

Description

Die Erfindung betrifft eine Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine mit einer Saugdüse gemäß dem Oberbegriff des Anspruches 1.The invention relates to a workplace of a cross-wound textile machine with a suction nozzle according to the preamble of claim 1.

Im Zusammenhang mit dem Betrieb von Arbeitsstellen Kreuzspulen herstellender Textilmaschinen, insbesondere von Kreuzspulautomaten, ist es üblich, im Falle einer Spulunterbrechung, zum Beispiel aufgrund eines Fadenbruches, eines kontrollierten Reinigerschnittes oder eines Vorlagespulenwechsels, über den Arbeitsstellenrechner der betreffenden Arbeitsstelle eine arbeitsstelleneigene Fadenverbindungsautomatik zu aktivieren. Das heißt, ein Arbeitsstellenrechner sorgt in einem solchen Fall dafür, dass, wie beispielsweise in der DE 40 05 752 A1 relativ ausführlich beschrieben ist, zunächst eine so genannte Saugdüse mit ihrer Mündung an die Oberfläche der langsam gegen die Wickelrichtung drehenden Auflaufspule angelegt und mit Unterdruck beaufschlagt wird. Die unterdruckbeaufschlagte Saugdüse versucht dann mit ihrer Mündung, das Fadenende des Oberfadens von der Oberfläche der als Kreuzspule ausgebildeten Auflaufspule aufzunehmen. Nach dem Erfassen des Oberfadens schwenkt die Saugdüse in ihre Ausgangslage, in der die Mündung der Saugdüse unterhalb einer Fadenverbindungsvorrichtung positioniert ist, zurück.
Der sich zwischen der Kreuzspule und der Saugdüse erstreckende Fadenstrang wird dabei in einen oberhalb der Fadenverbindungsvorrichtung angeordneten elektronischen Reiniger, eine in diesem Bereich positionierte Klemm- und Schneideinrichtung sowie, durch entsprechende Leitkonturen von Fadenleitblechen und Fadenleitbügeln geführt, in eine Schere einer unterhalb der Fadenverbindungsvorrichtung befindlichen Schneideinrichtung eingezogen.In connection with the operation of textile cross-machine producing textile machines, in particular of automatic packages, it is customary, in the case of a winding interruption, for example due to a yarn breakage, a controlled cleaner cut or a Nachlagespulenwechsels to activate on the workstation of the job concerned own job automatic threading automatic. That is, a workstation computer in such a case ensures that, such as in the DE 40 05 752 A1 is described in relative detail, first a so-called suction nozzle with its mouth is applied to the surface of the slowly rotating against the winding direction of package and subjected to negative pressure. The vacuum-loaded suction nozzle then attempts with its mouth to receive the yarn end of the upper thread from the surface of the package designed as a cross-wound bobbin. After detecting the upper thread, the suction nozzle pivots back to its original position, in which the mouth of the suction nozzle is positioned below a yarn joining device.
The yarn strand extending between the cross-wound bobbin and the suction nozzle is guided into a scissors-mounted electronic cleaner, a clamping and cutting device positioned in this region and, guided by corresponding guide contours of Fadenleitblechen and Fadenleitbügeln, in a pair of scissors located below the thread connecting device cutting device moved in.

Nahezu gleichzeitig mit der Saugdüse schwenkt ein in einer unteren Ausgangslage positioniertes so genanntes Greiferrohr in eine obere Arbeitsstellung und bringt dabei einen bis dahin beispielsweise in einem Fadenspanner gehaltenen, von der Vorlagespule abgezogenen Unterfaden mit. Beim Einschwenken des Greiferrohres in seine obere Arbeitsstellung gleitet der Unterfaden, der ebenfalls an entsprechenden Faden leitkonturen geführt ist, in eine geöffnete Fadenklemme sowie eine geöffnete Schneideinrichtung. Unter- und Oberfaden werden anschließend auf die richtige Länge abgeschnitten, in so genannten Auflöseröhrchen vorbereitet und in der Fadenverbindungseinrichtung pneumatisch miteinander verbunden.Almost at the same time as the suction nozzle, a so-called gripper tube positioned in a lower starting position pivots into an upper working position, bringing with it a lower thread that has been held, for example, in a thread tensioner and withdrawn from the supply spool. When swinging the gripper tube in its upper working position slides the lower thread, which also on corresponding thread guiding contours is guided in an open thread clamp and an open cutting device. The lower and upper threads are then cut to the correct length, prepared in so-called dissolution tubes and pneumatically connected to one another in the thread connecting device.

Das vorbeschriebene Fadenverbindungsverfahren hat sich in der Praxis bewährt und ist in der Textilindustrie seit langer Zeit im Einsatz.
Im Zusammenhang mit diesem bekannten Fadenverbindungsverfahren treten allerdings gelegentlich Schwierigkeiten bei der Aufnahme des Oberfadens von der Oberfläche der langsam in Abwickelrichtung rotierenden Kreuzspule auf.
Nicht unerhebliche Probleme, den Oberfaden von der Oberfläche der Kreuzspule aufzunehmen, sind beispielsweise oft dann gegeben, wenn das auf die Kreuzspule aufgelaufene Fadenende stark in die Kreuzspulenoberfläche eingewalkt oder das zu verarbeitende Garn relativ haarig ist.The above-described yarn joining method has proven itself in practice and has been used in the textile industry for a long time.
In connection with this known yarn joining method, however, occasionally difficulties in receiving the upper thread from the surface of the slowly rotating in the unwinding cheese on.
Not inconsiderable problems to take the upper thread from the surface of the cheese, for example, are often given when the accumulated on the cross-wound yarn end severely infiltrated into the cheese surface or the yarn to be processed is relatively hairy.

Um diese Probleme bei der Oberfadenaufnahme zu minimieren bzw. zu beseitigen, sind in der Vergangenheit bereits verschiedene Modifikationen der Saugdüse, insbesondere in deren Mündungsbereich, vorgeschlagen worden. Durch diese Modifikationen im Bereich des Saugdüsenkopfes sollten insbesondere die Strömungsverhältnisse im Mündungsbereich der unterdruckbeaufschlagten Saugdüse verbessert werden.In order to minimize or eliminate these problems in the upper thread take-up, various modifications of the suction nozzle, in particular in their mouth region, have already been proposed in the past. These modifications in the region of the suction nozzle head should in particular improve the flow conditions in the mouth region of the vacuum-loaded suction nozzle.

In der DE 1 560 367 A ist beispielsweise eine Arbeitsstelle einer Spulmaschine beschrieben, die mit einer fest installierten, das heißt, nicht schwenkbar gelagerten Saugdüse ausgerüstet ist. Die Saugdüse weist auf der Oberseite ihres Mündungsbereiches einen Ansatz auf, der über eine Hebelanordnung mit dem schwenkbar gelagerten Spulenrahmen der Arbeitsstelle so verbunden ist, dass er sich an den Durchmesser der Auflaufspule anpasst, das heißt, zur effektiven Fadenerfassung nahe an die Oberfläche der Auflaufspule reicht, ohne die Oberfläche zu berühren.In the DE 1 560 367 A For example, a job of a winder is described, which is equipped with a fixed, that is, not pivotally mounted suction nozzle. The suction nozzle has on the top of its mouth region on a neck which is connected via a lever arrangement with the pivotally mounted creel of the job so that it adapts to the diameter of the package, that is, for effective thread detection reaches close to the surface of the package without touching the surface.

Die durch die DE 1 560 367 A bekannte Ausführungsform einer Arbeitsstelle, mit einer festen Saugdüse und einem auf der Oberseite des Mündungsbereiches der Saugdüse beweglich gelagerten, über ein Hebelgestänge angesteuerten Ansatz, ist für moderne Kreuzspulautomaten allerdings ungeeignet.The by the DE 1 560 367 A known embodiment of a job, with a fixed suction nozzle and a movably mounted on the top of the mouth region of the suction nozzle, via a lever linkage driven approach is modern Spinning machines, however, unsuitable.

Die DE 29 08 731 B betrifft im Prinzip eine Weiterentwicklung der vorstehend beschriebenen Saugdüse. Das heißt, die in dieser Patentliteratur beschriebene, fest installierte Saugdüse weist auf der Oberseite ihres Mündungsbereiches ebenfalls einen verschiebbar gelagerten Ansatz auf, an den allerdings keine mechanische Antriebseinrichtung zu dessen Positionierung in einer Ansaugstellung angeschlossen ist, sondern lediglich zwei kleine Rückholfedern.
Im Bedarfsfall soll die Positionierung des Dichtelements in seiner Ansaugstellung pneumatisch durch den in der Saugdüse herrschenden Unterdruck erfolgen, mit dem die Saugdüse im Falle eines Fadenbruchs beaufschlagt wird.The DE 29 08 731 B refers in principle to a further development of the suction nozzle described above. That is, the fixed suction nozzle described in this patent literature has on the top of its mouth region also a slidably mounted approach to which, however, no mechanical drive means is connected to its positioning in a suction position, but only two small return springs.
If necessary, the positioning of the sealing element in its suction position should be carried out pneumatically by the pressure prevailing in the suction nozzle negative pressure, with which the suction nozzle is acted upon in the event of a yarn breakage.

Die Einrichtung gemäß DE 29 08 731 B hat sich allerdings nicht bewährt und entsprechend keinen Eingang in der Praxis gefunden.The device according to DE 29 08 731 B However, has not proven and accordingly found no input in practice.

In der JP HO 3- 56771 sind; wie aus Fig.1 dieser Literaturstelle ersichtlich, Offenend-Spinnmaschinen beschrieben, deren Arbeitsstellen durch so genannte Anspinnaggregate versorgt werden.
Das heißt, es kommen entlang der Arbeitsstellen verfahrbare, bei Bedarf an einer Arbeitsstelle positionierbare Anspinnaggregate zum Einsatz, die unter anderem mit einer schwenkbar gelagerten, unterdruckbeaufschlagbaren Saugdüse sowie einer Hilfsantriebseinrichtung ausgestattet sind.
Ähnlich wie die durch die DE 1 50 367 B1 oder die DE 29 08 731 bekannten arbeitsstelleneigenen Saugdüsen ist auch die in der JP HO 3- 56771 beschriebene Saugdüse des Anspinnaggregates auf der Oberseite ihres Mündungsbereiches mit einer beweglich bzw. verschiebbar gelagerten Einrichtung ausgestattet.
Diese beweglich bzw. verschiebbar gelagerte Einrichtung liegt bei der Aufnahme des auf die Oberfläche der Aufnahmespule aufgelaufenen Fadenendes des Oberfadens an der Oberfläche der Aufnahmespule an, um dadurch das Fadenlösen mechanisch zu unterstützen. Die Aufnahmespule selbst ist während der Fadenendaufnahme von ihrer Kontaktwalze, die in der Regel als so genannte Fadenführungstrommel ausgebildet ist, abgehoben und wird durch die Hilfsantriebseinrichtung des Anspinnaggregates in Abwickelrichtung rotiert.
Auch beim Einsatz derartiger, an sich bewährter Anspinnaggregate ergeben sich oft erhebliche Probleme, wenn das auf die Auflaufspule aufgelaufene Fadenende stark in die Oberfläche der üblicherweise als Kreuzspule ausgebildeten Auflaufspule eingewalkt und/oder das zu verarbeitende Garn relativ haarig ist.
Das heißt, auch die Saugdüsen dieser bekannten Anspinnaggregate haben bei schwierigen Betriebszuständen oft große Schwierigkeiten, den Oberfaden zuverlässig von der Oberfläche einer Auflaufspule aufzunehmen.In the JP HO 3-56771 are; like out Fig.1 This reference will be apparent, Offenend spinning machines described, the jobs are supplied by so-called piecing.
That is, it come along the workstations movable, if necessary positionable on a job Anspinnaggregate used, which are equipped, inter alia, with a pivotally mounted, unterdruckbeaufschlagbaren suction nozzle and an auxiliary drive device.
Similar to the one by the DE 1 50 367 B1 or the DE 29 08 731 known working own suction nozzles is also in the JP HO 3-56771 described suction nozzle of piecing on the top of its mouth region equipped with a movable or displaceably mounted device.
This movable or displaceably mounted device is in the recording of accumulated on the surface of the take-up spool yarn end of the upper thread on the surface of the take-up spool, thereby mechanically assisting the yarn loosening. The take-up spool itself is lifted off during the thread take-up of its contact roller, which is usually designed as a so-called yarn guide drum and is rotated by the auxiliary drive means of the piecing in the unwinding.
Even with the use of such, in itself proven piecing often considerable problems arise when the accumulated on the package reel yarn end strongly infiltrated in the surface of the usually designed as a cheese package casserole and / or the yarn to be processed is relatively hairy.
That is, the suction nozzles of these known piecing units often have great difficulty in difficult operating conditions to reliably pick up the upper thread from the surface of a package.

Des Weiteren ist bereits vorgeschlagen worden, an den Arbeitsstellen einer Kreuzspulen herstellenden Textilmaschine jeweils eine Saugdüse zu installieren, bei der die Strömungsverhältnisse und damit das Fadenendaufnahmevermögen dadurch positiv beeinflusst wird, dass im Bereich der Mündung der Saugdüse zusätzliche pneumatische Einrichtungen eingearbeitet oder angeordnet sind.Furthermore, it has already been proposed to install at the workstations of a textile machine producing textile cheeses each a suction nozzle, in which the flow conditions and thus the Fadenendaufnahmevermögen is positively influenced by the fact that additional pneumatic devices are incorporated or arranged in the mouth of the suction nozzle.

In der EP 0 128 121 A1 ist beispielsweise eine Arbeitsstelle einer Spulmaschine beschrieben, die mit einer fest installierten Saugdüse ausgerüstet ist, deren lippenartiger Mündungsbereich auf seiner Unterseite etwas nach oben gewölbt ist und knapp unterhalb der Oberfläche einer in einem schwenkbaren Spulenrahmen drehbar gelagerten Kreuzspule endet. Auf der Oberseite weist der Mündungsbereich dieser Saugdüse außerdem mehrere Öffnungen auf, durch die bei unterdruckbeaufschlagter Saugdüse zusätzliche Luft angesaugt wird, wodurch die Saugwirkung verbessert werden soll.In the EP 0 128 121 A1 For example, a workstation of a winding machine is described, which is equipped with a permanently installed suction nozzle whose lip-like mouth region is curved slightly upwards on its underside and ends just below the surface of a rotatably mounted in a pivoting creel cheese. On the upper side, the mouth region of this suction nozzle also has a plurality of openings through which additional air is sucked in with vacuum-loaded suction nozzle, whereby the suction effect is to be improved.

Die DE 32 06 478 C offenbart eine Arbeitsstelle mit einer schwenkbar gelagerten, unter-druckbeaufschlagbaren Saugdüse, die in ihrem Mündungsbereich mit zusätzlichen Druckluftdüsen ausgestattet ist. Über die Druckluftdüsen kann im Bedarfsfall eine zusätzliche Luftströmung in Richtung der Unterdruckströmung der Saugdüse initiiert werden.The DE 32 06 478 C discloses a job with a pivotally mounted, under-pressurizable suction nozzle, which is equipped in its mouth with additional compressed air nozzles. If necessary, an additional air flow in the direction of the negative pressure flow of the suction nozzle can be initiated via the compressed air nozzles.

Derartig ausgebildete Saugdüsen sind zwar bezüglich ihres Arbeitsvermögens recht wirkungsvoll, allerdings ist die Anordnung solcher zusätzlicher Druckluftdüsen und deren Anschluss an ein Unterdrucksystem relativ aufwendig und damit kostenintensiv. Außerdem verursacht die benötigte Druckluft zusätzliche Energiekosten, was ebenfalls negativ ist.Such trained suction nozzles are indeed quite effective in terms of their working capacity, however, the arrangement of such additional compressed air nozzles and their connection to a vacuum system is relatively expensive and therefore costly. In addition, the required compressed air causes additional energy costs, which is also negative.

In der GB 2 143 548 A ist eine Arbeitsstelle mit einer Saugdüse beschrieben, die nicht, wie bei Saugdüsen üblich, nach vorne hin geöffnet ist, sondern die in ihrem vorderen Bereich auf ihrer Oberseite einen in Querrichtung verlaufenden Öffnungsschlitz aufweist. Oberhalb des Öffnungsschlitzes ist ein Aufsatz installiert, der so ausgebildet ist, dass ein angesaugter Faden sofort mehrfach umgelenkt wird.
Durch dieses mehrfache Umlenken des Fadens soll sichergestellt werden, dass ein gefasster Faden bei seinem Transport und Einfädeln in eine Fadenspleißvorrichtung ausreichend stramm gehalten wird.In the GB 2 143 548 A is described a job with a suction nozzle, which is not open, as usual with suction nozzles, towards the front, but has in its front region on its upper side a transverse opening slot. Above the opening slot, a cap is installed, which is designed so that a sucked thread is deflected several times immediately.
This multiple deflection of the thread is to ensure that a looped thread is kept sufficiently tight during its transport and threading in a Fadensverlißvorrichtung.

Moderne Kreuzspulen herstellenden Textilmaschinen weisen bekanntlich im Bereich ihrer Arbeitsstellen als Kreuzspulenantriebs- und Fadenchangiereinrichtungen oft Kontaktwalzen, zum Beispiel in Form von Fadenführungstrommeln, auf.
Um bei derartigen Kontaktwalzen, beispielsweise nach einem Fadenbruch, ein ungewolltes Abgleiten des Fadenendes von der Oberfläche der Kreuzspule zu verhindern bzw. um nach einem erfolgreichen Fadenspleiß ein problemfreies, erneutes Einlegen des Fadens in die Nut der Fadenführungstrommel zu ermöglichen, sind diese Kontaktwalzen in der Regel mit so genannten Gleit- und Abweisblechen ausgestattet. Diese Gleit- und Abweisbleche umfassen jeweils die einzelnen Kontaktwalzen teilweise und bilden gute Fadenführungsmittel.
Allerdings verhindern die Gleit- und Abweisbleche auch, dass die Saugdüse bei der Oberfadenaufnahme in einer strömungstechnisch optimalen Aufnahmestellung positioniert werden kann. Das heißt, beim Einsatz derartiger Gleit- und Abweisbleche im Bereich der Kontaktwalze sind bislang, insbesondere bei schwierigen Betriebsverhältnissen, Probleme bei der Aufnahme des Oberfadens oft kaum zu vermeiden.Textile machines producing modern cheeses are known to often have contact rollers, for example in the form of thread guide drums, in the area of their workstations as cross-wound bobbin drive and thread changer devices.
In order to prevent in such contact rollers, for example, after a yarn breakage, an unwanted slipping of the thread end of the surface of the cheese or to allow for a successful thread splicing a problem-free, re-insertion of the thread in the groove of the thread guide drum, these contact rollers are usually equipped with so-called sliding and deflector plates. These sliding and Abweisbleche each include the individual contact rollers partially and form good yarn guide means.
However, the sliding and Abweisbleche also prevent that the suction nozzle can be positioned in the upper thread receiving in a fluidically optimal receiving position. That is, when using such sliding and Abweisbleche in the contact roller so far, especially in difficult operating conditions, problems in receiving the upper thread are often difficult to avoid.

Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine vorzuschlagen, deren Saugdüse mit geeigneten Mitteln so zusammenwirkt, dass ein auf die Kreuzspule aufgelaufenes Fadenende eines Oberfadens auch bei schwierigen Betriebszuständen, zum Beispiel haarigen Garnen, zuverlässig und energiesparend aufgenommen werden kann.Based on the aforementioned prior art, the present invention seeks to propose a job of a cheese-producing textile machine, the suction nozzle cooperates with suitable means so that one on the Cross reel accumulated yarn end of an upper thread, even in difficult operating conditions, such as hairy yarns, reliable and energy-saving can be added.

Diese Aufgabe wird erfindungsgemäß durch eine Arbeitsstelle mit einer Saugdüse gelöst, wie sie im Anspruch 1 beschrieben ist.This object is achieved by a job with a suction nozzle, as described in claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Eine Arbeitsstelle mit einer Saugdüse, die mit einer Abschirmeinrichtung zusammenwirkt, die verhindert, dass bei in Fadenaufnahmesstellung positionierter, unterdruckbeaufschlagter Saugdüse unterhalb der Saugdüse eine Saugluftströmung entsteht, die von unten in die Ansaugöffnung der Saugdüse einströmt, hat den Vorteil, dass es zu einer vorteilhaften Konzentration des in die Saugdüse einströmenden Saugluftstromes kommt. Das heißt, die unterhalb der Ansaugöffnung der Saugdüse angeordnete Einrichtung verhindert, dass es auch unterhalb der Saugdüse zum Entstehen eines Saugluftstromes kommt, mit der Folge, dass der von oben in die Saugdüse einströmende Saugluftstrom intensiver wird. Eine solche Intensivierung des von oben einströmenden Saugluftstromes wirkt sich sehr positiv auf das Ablösen des Fadenendes von der Oberfläche der Kreuzspule sowie die anschließende Fadenaufnahme aus. Durch die Vermeidung der Entstehung einer Saugluftströmung zwischen der Ansaugöffnung der Saugdüse und der Kontaktwalze kann außerdem der Energiebedarf der Saugdüse optimiert werden. Das heißt, entweder kann unter Beibehaltung des bisherigen Energieverbrauchs der Saugdüse deren Fehlerquote bei der Fadenendaufnahme deutlich gesenkt werden und/oder es kann der Energieverbrauch der Saugdüse erheblich gesenkt werden, ohne dass es zu einer Steigerung der Anzahl der Fehlversuche der Saugdüse bei der Fadenendaufnahme kommt.A work station with a suction nozzle, which cooperates with a shielding device which prevents a suction air flow, which is introduced from below into the suction opening of the suction nozzle when the suction nozzle is positioned in the suction receiving position, under the suction nozzle produces a suction air flow, which has the advantage that it leads to an advantageous concentration of the suction air flowing into the suction nozzle comes. That is, the device arranged below the suction opening of the suction nozzle prevents the formation of a suction air flow even below the suction nozzle, with the result that the suction air stream flowing into the suction nozzle from above becomes more intense. Such intensification of the suction air stream flowing in from above has a very positive effect on the detachment of the thread end from the surface of the cross-wound bobbin and the subsequent thread take-up. By avoiding the formation of a suction air flow between the suction port of the suction nozzle and the contact roller, the energy requirement of the suction nozzle can also be optimized. That is, either while maintaining the current energy consumption of the suction nozzle whose error rate at the thread end recording can be significantly reduced and / or the power consumption of the suction nozzle can be significantly reduced, without causing an increase in the number of failed attempts of the suction nozzle at the yarn end.

Durch die unterhalb der Ansaugöffnung der Saugdüse angeordnete Abschirmeinrichtung erhält man im Bereich der Eingangsöffnung der Saugdüse insgesamt eine relativ starke, gegen die Abwickelrichtung der Kreuzspule gerichtete Saugluftströmung, die im Sinne "ablösen" auf das auf der Oberfläche der Kreuzspule aufliegende Fadenende einwirkt. Diese gegen die Abwickelrichtung gerichtete Saugluftströmung gewährleistet zuverlässig, dass der Faden von der Oberfläche der Kreuzspule gelöst wird und anschließend zuverlässig in die unterdruckbeaufschlagte Saugdüse eingesaugt werden kann.By arranged below the suction of the suction nozzle shielding obtained in the region of the inlet opening of the suction nozzle a total of relatively strong, directed against the unwinding of the cheese suction air flow, which acts in the sense "detachment" on the resting on the surface of the cheek thread end. This directed against the unwinding Saugluftströmung reliably ensures that the thread is released from the surface of the cheese and can then be reliably sucked into the vacuum-loaded suction nozzle.

Wie im Anspruch 2 beschrieben, liegt in vorteilhafter Ausführungsform die Abschirmeinrichtung bei in Fadenaufnahmestellung positionierter Saugdüse an der Kontaktwalze an. Das bedeutet, außer einer von oben einströmenden Saugluftströmung stehen noch zwei seitliche Saugluftströmungen an, die dafür sorgen, dass auch Fadenenden, die sich im Stirnbereich der Kreuzspulenoberfläche befinden, zuverlässig in den Bereich der Eingangsöffnung der Saugdüse gesaugt und anschließend aufgenommen werden können.As described in claim 2, is located in an advantageous embodiment, the shielding at positioned in the thread receiving position suction nozzle on the contact roller. This means that in addition to a suction air flow flowing in from above, there are also two lateral suction air flows, which ensure that even thread ends which are located in the face region of the cheese surface can be reliably sucked into the region of the inlet opening of the suction nozzle and subsequently taken up.

Wie im Anspruch 3 dargelegt, ist in vorteilhafter Ausführungsform vorgesehen, dass die Abschirmeinrichtung über ein Dichtelement verfügt, das an der Unterseite des Saugdüsenkopfes so installiert ist, dass es bei in Fadenaufnahmestellung positionierter Saugdüse mit einer unterhalb der Saugdüse angeordneten Spulenantriebswalze korrespondiert.
Durch ein solches Dichtelement kann auf einfache Weise verhindert werden, dass es unterhalb der Saugdüse zum Entstehen einer in Abwickelrichtung gerichteten, unteren Saugluftströmung kommt.
Eine derartig ausgerichtete untere Saugluftströmung ist im Zusammenhang mit der Fadenaufnahme durch eine Saugdüse negativ, da das Fadenende durch eine solche untere Saugluftströmung im Sinne "anlegen" an die Oberfläche der Kreuzspulen beaufschlagt wird, was die Fadenaufnahme erheblich erschwert.As set forth in claim 3, it is provided in an advantageous embodiment that the shielding device has a sealing element which is installed on the underside of the Saugdüsenkopfes so that it corresponds with positioned in the thread receiving position of the suction nozzle with a arranged below the suction nozzle roller drive roller.
By such a sealing element can be prevented in a simple manner that it comes below the suction nozzle for the emergence of a directed in the unwinding, lower Saugluftströmung.
Such oriented lower suction air flow is negative in connection with the thread take-up by a suction nozzle, since the thread end is acted upon by such a lower suction air flow in the sense "create" on the surface of the cheeses, which makes the thread take much more difficult.

Wie entsprechende Versuche ergeben haben, ist eine vorteilhafte Ausführungsform gegeben, wenn, wie im Anspruch 4 dargelegt, die Abschirmeinrichtung ein klappbar gelagertes Dichtelement aufweist, das beispielsweise kostengünstig als Spritz- oder Druckgussteil ausgebildet sein kann. Dieses klappbar gelagerte Dichtelement ist vorzugsweise so ausgebildet und unterhalb der Saugdüse angeordnet, dass es einerseits bei in Fadenendaufnahmestellung positionierter Saugdüse an der unterhalb der Kreuzspule angeordneten Kontaktwalze anliegt und andererseits weder beim Einschwenken der Saugdüse in die Fadenendaufnahmestellung, noch beim späteren Ausschwenken der Saugdüse mit Abweis- und Einfädelkonturen kollidiert, die im Bereich der Arbeitsstelle vor der Kontaktwalze installiert sind. Durch die gewählte Ausbildung und Anordnung des Dichtelements ist folglich gewährleistet, dass sich das Dichtelement bei in Fadenendaufnahmestellung positionierter Saugdüse stets problemlos an die Kontaktwalze anlegen kann.As corresponding tests have shown, an advantageous embodiment is given if, as set forth in claim 4, the shielding device has a hinged sealing element, which may be inexpensively formed as injection molded or die-cast, for example. This hinged sealing element is preferably designed and arranged below the suction nozzle that, on the one hand, it bears against the contact roller arranged below the cross-wound contact roller and, on the other hand, neither during pivoting of the suction nozzle into the yarn end receiving position, nor later during the pivoting of the suction nozzle with deflecting and threading contours that are installed in the area of the job in front of the contact roller. Due to the chosen training and arrangement The sealing element is thus ensured that the sealing element can always create problems with the contact roller when positioned in Fadenendaufnahmestellung suction nozzle.

Gemäß Anspruch 5 ist vorteilhafterweise außerdem vorgesehen, dass das klappbar gelagerte Dichtelement durch ein Federmittel so beaufschlagt wird, dass es einerseits stets zuverlässig an der Kontaktwalze anliegt, anderseits so schwenkbeweglich gelagert ist, dass es beim Ein- bzw. beim Ausschwenken der Saugdüse, je nach Bedarf, temporär nach hinten oder temporär nach vorne wegschwenken kann.According to claim 5 is advantageously also provided that the hinged sealing element is acted upon by a spring means that on the one hand always rests reliably on the contact roller, on the other hand is mounted so pivotally that it is on or when swinging the suction nozzle, depending on Demand, temporarily can swing away to the rear or temporarily forward.

In alternativer Ausführungsform kann das klappbar gelagerte Dichtelement, wie im Anspruch 6 beschrieben, auch so ausgebildet sein, dass es bei in Fadenendaufnahmestellung positionierter Saugdüse schwerkraftbedingt an der Kontaktwalze anliegt.
Eine solche Ausbildung stellt eine sehr kostengünstige Variante der Lagerung eines schwenkbaren Dichtelementes dar.In an alternative embodiment, the hinged sealing element, as described in claim 6, also be designed so that it is applied to the contact roller by gravity due to positioned in Fadenendaufnahmestellung suction nozzle.
Such a design represents a very cost-effective variant of the storage of a pivotable sealing element.

Ebenfalls recht kostengünstig und besonders vorteilhaft ist die im Anspruch 7 beschriebene Ausführungsform, bei der die Abschirmeinrichtung als elastisches Dichtelement ausgebildet ist.
Durch ein solches unterhalb der Saugdüse angeordnetes elastisches Dichtelement, das, wie im Anspruch 8 dargelegt, vorzugsweise als aus Gummi gefertigte elastische Dichtlippe ausgebildet ist, kann einerseits auf relativ einfache Weise gewährleistet werden, dass bei in Fadenendaufnahmestellung positionierter Saugdüse der Raum zwischen Saugdüse und Kontaktwalze stets weitestgehend geschlossen ist und damit in diesem Bereich das Entstehen einer unteren Saugluftströmung sicher verhindert wird, anderseits wird durch eine solche elastische Dichtlippe auch das Ein- und Ausschwenken der Saugdüse in keiner Weise negativ beeinflusst.Also quite inexpensive and particularly advantageous is the embodiment described in claim 7, wherein the shielding device is designed as an elastic sealing element.
By such arranged below the suction nozzle elastic sealing element, as set forth in claim 8, preferably designed as rubber elastic sealing lip, can be ensured on the one hand in a relatively simple manner that when positioned in Fadenendaufnahmestellung suction nozzle, the space between the suction nozzle and contact roller always As far as possible is closed and thus the emergence of a lower suction air flow is reliably prevented in this area, on the other hand, by such elastic sealing lip and the pivoting in and out of the suction nozzle in any way adversely affected.

Gemäß Anspruch 9 ist des Weiteren vorgesehen, dass die Arbeitsstelle der Kreuzspulen herstellenden Textilmaschine eine Saugdüse mit einer zugehörigen separaten Abschirmeinrichtung aufweist. Eine solche separate Abschirmeinrichtung verfügt vorzugsweise über ein beweglich gelagertes, im Bedarfsfall zwischen der Saugdüse und der Kontaktwalze positionierbares Dichtelement, das, in seiner Betriebsstellung auf der Kontaktwalze positioniert, ebenfalls das Entstehen einer Saugluftströmung zwischen der Ansaugöffnung der Saugdüse und der Kontaktwalze zuverlässig verhindert.
Durch das unterhalb der Ansaugöffnung der Saugdüse positionierbare Dichtelement der Abschirmeinrichtung erhält man im Bereich der Eingangsöffnung der Saugdüse insgesamt eine relativ starke, gegen die Abwickelrichtung der Kreuzspule gerichtete Saugluftströmung, die positiv im Sinne "ablösen" auf das auf der Oberfläche der Kreuzspule aufliegende Fadenende einwirkt. Diese gegen die Abwickelrichtung gerichtete Saugluftströmung gewährleistet zuverlässig, dass der Oberfaden von der Oberfläche der Kreuzspule gelöst wird und anschließend zuverlässig in die Saugdüse eingesaugt werden kann.
Das bedeutet, auch bei der Abschirmeinrichtung gemäß Anspruch 9 wird der von oben in die Saugdüse einströmende Saugluftstrom intensiver, was sich positiv auf das Fadenlösen und die Fadenendaufnahme auswirkt, und es werden vorteilhafte, seitliche Saugluftströme initiiert.
Wie vorstehend bereits beschrieben, bringt der Einsatz einer solchen separaten Abschirmeinrichtung außerdem Vorteile in Bezug auf den Energiebedarf der Saugdüse.According to claim 9 is further provided that the workstation of the cheese-producing textile machine has a suction nozzle with an associated separate shielding. Such a separate shielding device preferably has a movably mounted, if necessary between the suction nozzle and the contact roller positionable sealing element, which, in its operating position on the Contact roller positioned, also reliably prevents the emergence of a suction air flow between the suction port of the suction nozzle and the contact roller.
By means of the sealing element of the shielding device which can be positioned below the suction opening of the suction nozzle, a relatively strong stream of suction air directed against the unwinding direction of the cheese is obtained in the region of the inlet opening of the suction nozzle, which positively acts in the sense of "detaching" on the thread end resting on the surface of the cheese. This directed against the unwinding Saugluftströmung reliably ensures that the upper thread is released from the surface of the cheese and can then be reliably sucked into the suction nozzle.
This means that even in the shielding device according to claim 9, the suction air stream flowing from above into the suction nozzle becomes more intense, which has a positive effect on the yarn loosening and yarn end absorption, and advantageous, lateral suction air flows are initiated.
As already described above, the use of such a separate shielding device also brings advantages in terms of the energy consumption of the suction nozzle.

Bezüglich der exakten Ausbildung der im Anspruch 9 beschriebenen separaten Abschirmeinrichtung sind sehr viele verschiedene Ausführungsformen denkbar.With regard to the exact design of the separate shielding device described in claim 9 very many different embodiments are conceivable.

Das beweglich gelagerte Dichtelement der Abschirmeinrichtung kann beispielsweise mittels einer ansteuerbaren Antriebseinrichtung im Bedarfsfall definiert zwischen der Saugdüse und der Kontaktwalze positionierbar sein. Wichtig ist in diesem Zusammenhang lediglich, dass das Dichtelement der Abschirmeinrichtung einerseits während des regulären Spulbetriebes so positionierbar ist, dass der Spulbetrieb der Arbeitsstelle nicht behindert wird, anderseits bei in Fadenendaufnahmestellung positionierter Saugdüse zuverlässig in einer Position steht, in der sichergestellt ist, dass sich unterhalb der Saugdüse keine untere Saugluftströmung ausbilden kann.The movably mounted sealing element of the shielding device can, for example, be positioned in a defined manner between the suction nozzle and the contact roller by means of a controllable drive device. It is important in this context only that the sealing element of the shielding on the one hand during normal winding operation is positioned so that the winding operation of the job is not hindered, on the other hand reliably positioned in Fadenendaufnahmestellung suction nozzle is in a position in which it is ensured that below the suction nozzle can not form a lower Saugluftströmung.

Die Erfindung wird nachfolgend anhand von in den Zeichnungen dargestellten Ausführungsbeispielen näher erläutert.The invention will be explained in more detail with reference to embodiments shown in the drawings.

Es zeigen:

Fig. 1
schematisch in Seitenansicht eine Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine mit einer Saugdüse, die eine erfindungsgemäße Abschirmeinrichtung aufweist,
Fig. 2
in einem größeren Maßstab eine erste Ausführungsform einer an einer Saugdüse angeordneten Abschirmeinrichtung zur Verhinderung der Entstehung einer unteren Saugluftströmung,
Fig. 3
eine zweite Ausführungsform einer an einer Saugdüse angeordneten Abschirmeinrichtung zur Verhinderung der Entstehung einer unteren Saugluftströmung,
Fig. 4
eine weitere Ausführungsform einer Abschirmeinrichtung zur Verhinderung der Entstehung einer unteren Saugluftströmung,
Fig. 5
schematisch eine Darstellung der Saugluftströmungsverhältnisse, wie sie bei Saugdüsen gemäß dem Stand der Technik im Mündungsbereich herrschen.
Show it:
Fig. 1
schematically in side view of a workstation of a cheese-producing textile machine with a suction nozzle having a shielding device according to the invention,
Fig. 2
on a larger scale, a first embodiment of a shielding device disposed on a suction nozzle for preventing the formation of a lower suction air flow,
Fig. 3
A second embodiment of a screening device arranged on a suction nozzle for preventing the formation of a lower suction air flow,
Fig. 4
a further embodiment of a shielding device for preventing the formation of a lower suction air flow,
Fig. 5
schematically a representation of Saugluftströmungsverhältnisse, as prevail in suction nozzles according to the prior art in the mouth area.

In Fig. 1 ist in Seitenansicht schematisch eine Arbeitsstelle 2 einer Kreuzspulen herstellenden Textilmaschine, im Ausführungsbeispiel eines so genannten Kreuzspulautomaten 1, dargestellt.
Auf den Arbeitsstellen 2 derartiger Kreuzspulautomaten 1 werden, wie bekannt und daher nicht näher erläutert, Spinnkopse 3, die zum Beispiel auf Ringspinnmaschinen produziert wurden und relativ wenig Garnmaterial aufweisen, zu großvolumigen Kreuzspulen 5 umgespult. Die Kreuzspulen 5 werden nach ihrer Fertigstellung mittels eines (nicht dargestellten) selbsttätig arbeitenden Serviceaggregates, beispielsweise eines so genannten Kreuzspulenwechslers, auf eine maschinenlange Kreuzspulentransporteinrichtung 7 übergeben und anschließend zu einer maschinenendseitig angeordneten Spulenverladestation oder dergleichen transportiert.In Fig. 1 is a side view schematically a job 2 of a cheese-producing textile machine, in the embodiment of a so-called cross-winding machine 1, shown.
As is known and therefore not further explained, spinning workpieces 3, which have been produced, for example, on ring spinning machines and have relatively little yarn material, are rewound into large-volume cheeses 5 on the workstations 2 of such automatic winder 1. The cheeses 5 are after their completion by means of a (not shown) automatically operating service unit, for example, a so-called cheese change, handed over to a machine-length cheese package conveyor 7 and then transported to a machine end side Spulenverladestation or the like.

Solche Kreuzspulautomaten 1 weisen in der Regel außerdem eine Logistikeinrichtung in Form eines Spulen- und Hülsentransportsystems 6 auf. In diesem Spulen- und Hülsentransportsystem 6 laufen auf Transporttellern 11 Spinnkopse 3 beziehungsweise Leerhülsen 34 um. Vom Hülsentransportsystem 6 sind in der Fig. 1 lediglich die Kopszuführstrecke 24, die reversierend antreibbare Speicherstrecke 25, eine der zu den Spulstellen 2 führenden Quertransportstrecken 26 sowie die Hülsenrückführstrecke 27 dargestellt.As a rule, such automatic packages 1 also have a logistics device in the form of a package and tube transport system 6. In this bobbin and tube transport system 6 run on transport plates 11 spinning cops 3 and Empty tubes 34 um. From the sleeve transport system 6 are in the Fig. 1 only the Kopszuführstrecke 24, the reversibly driven storage section 25, one of the leading to the winding units 2 transverse transport sections 26 and the sleeve return path 27 shown.

Des Weiteren weist jede Arbeitsstelle 2 des Kreuzspulautomaten 1 einen Arbeitsstellenrechner 28, der über eine Busverbindung 29 an eine Zentralsteuereinheit 30 des Kreuzspulautomaten 1 angeschlossen ist, sowie verschiedene weitere Einrichtungen auf, die für einen ordnungsgemäßen Betrieb solcher Arbeitsstellen 2 notwendig sind.
Eine dieser an sich bekannten Einrichtungen ist beispielsweise die Spulvorrichtung 4. Eine solche Spulvorrichtung 4 verfügt über einen Spulenrahmen 8, der um eine Schwenkachse 12 beweglich gelagert ist. Wie in Fig. 1 dargestellt, liegt eine im Spulenrahmen 8 frei rotierbar gehalterte Kreuzspule 5 während des Spulbetriebes mit ihrer Oberfläche auf einer Kontaktwalze 9 auf.
Eine solche Kontaktwalze kann beispielsweise, wie in Fig.1 dargestellt, eine Spulenantriebswalze 9 sein, die beispielsweise durch einen Elektromotor 33 beaufschlagt wird. Der Elektromotor 33 ist dabei, zum Beispiel über eine Steuerleitung 35, ebenfalls an den Arbeitsstellenrechner 28 angeschlossen.
Allerdings könnte der Spulenrahmen 9, wie an sich bekannt, auch direkt mit einem Kreuzspulenantrieb ausgestattetet werden. In einem solchen Fall würde die rotierende Kreuzspule 5 auf einer so genannten Stützwalze aufliegen und diese reibschlüssig antreiben.Furthermore, each workstation 2 of the automatic winder 1 has a workstation computer 28, which is connected via a bus connection 29 to a central control unit 30 of the automatic cheese winder 1, as well as various other devices which are necessary for the proper operation of such workstations 2.
One of these devices known per se is, for example, the winding device 4. Such a winding device 4 has a coil frame 8 which is movably mounted about a pivot axis 12. As in Fig. 1 shown, is in the coil frame 8 freely rotatably supported cross-wound bobbin 5 during the winding operation with its surface on a contact roller 9.
Such a contact roller may, for example, as in Fig.1 shown, a coil drive roller 9, which is acted upon for example by an electric motor 33. The electric motor 33 is connected, for example via a control line 35, also to the workstation computer 28.
However, the coil frame 9, as known per se, could also be equipped directly with a cheese drive. In such a case, the rotating cross-wound bobbin 5 would rest on a so-called support roller and drive it frictionally.

Zur Changierung des Fadens 16 während des Spulprozesses ist eine Fadenchangiereinrichtung 10 vorgesehen. Eine solche, in der Fig. 1 lediglich schematisch angedeutete Fadenchangiereinrichtung 10 besteht beispielsweise aus einem Fingerfadenführer 13, der, durch einen elektromotorischen Antrieb 14 beaufschlagt, den auf die Kreuzspule 5 auflaufenden Faden 16 zwischen den Stirnseiten der Kreuzspule 5 traversiert. Über eine Steuerleitung 15 steht auch der Fadenführerantrieb 14 mit dem Arbeitsstellenrechner 28 in Verbindung.For traversing the thread 16 during the winding process a Fadenchangiereinrichtung 10 is provided. Such, in the Fig. 1 merely diagrammatically indicated Fadenchangiereinrichtung 10 consists for example of a finger thread guide 13, which, acted upon by an electric motor drive 14, traversing the accumulating on the cheese 5 thread 16 between the end faces of the cheese 5 traversed. Via a control line 15 and the thread guide drive 14 is connected to the workstation computer 28 in connection.

Selbstverständlich kann anstelle der im vorliegenden Ausführungsbeispiel beschriebenen Spulenantriebswalze oder Stützwalze sowie zugehöriger Fadenchangiereinrichtung auch eine so genannte Fadenführungstrommel zum Einsatz kommen.Of course, instead of the coil drive roller or back-up roller described in the present embodiment as well as the associated thread switching device, a so-called thread guide drum can also be used.

Derartige, in der Praxis durchaus bewährte, vorzugsweise einzelmotorisch angetriebenen Fadenführungstrommeln rotieren während des Spulbetriebes die Kreuzspulen reibschlüssig und changieren dabei gleichzeig mit einer Fadenführungsnut den auflaufenden Faden.Such, in practice well proven, preferably single-motor driven thread guide drums rotate during cheese winding, the cheese spools frictionally and change the same time with a Fadenführungsnut the tarnished thread.

Die in Fig.1 dargestellte Arbeitsstelle 2 verfügt außerdem über eine Fadenverbindungseinrichtung 42, vorzugsweise eine pneumatische Fadenspleißeinrichtung, ein Greiferrohr 43 zum Handhaben eines Unterfadens sowie über eine Saugdüse 17, mit der ein auf die Kreuzspule 5 aufgelaufener Oberfaden aufgenommen und in die Fadenverbindungseinrichtung 42 eingelegt werden kann.In the Fig.1 illustrated job 2 also has a thread connecting device 42, preferably a pneumatic yarn splicing device, a gripper tube 43 for handling a lower thread and a suction nozzle 17, with which an accumulated on the cheese 5 top thread can be added and inserted into the thread connecting device 42.

Die Saugdüse 17 ist dabei vorzugsweise, wie nachfolgend anhand der Figuren 2 und 3 erläutert werden wird, mit einer unterhalb der Ansaugöffnung 18 der Saugdüse 17 installierten Abschirmeinrichtung 19A bzw. 19B ausgestattet, die bei in Fadenendaufnahmestellung positionierter Saugdüse 17 mit ihrem Dichtelement 22A bzw. 22B verhindert, dass zwischen der Saugdüse 17 und der Kontaktwalze 9 eine untere Saugluftströmung SLSu entstehen kann, die von unten in die Ansaugöffnung 18 der Saugdüse 17 einströmen würde.The suction nozzle 17 is preferably, as described below with reference to FIG FIGS. 2 and 3 will be explained, equipped with a below the suction port 18 of the suction nozzle 17 installed shielding 19A and 19B, which prevents at positioned in Fadenendaufnahmestellung suction nozzle 17 with its sealing element 22A and 22B prevents that between the suction nozzle 17 and the contact roller 9, a lower Saugluftströmung SLSu may arise, which would flow from below into the suction port 18 of the suction nozzle 17.

Eine alternative Ausbildung einer Abschirmeinrichtung ist in Fig.4 dargestellt.
In diesem Fall ist im Bereich der Arbeitsstelle 2 eine separate Abschirmeinrichtung 22C vorgesehen, deren beweglich gelagertes Dichtelement 22C im Bedarfsfall unterhalb der Ansaugöffnung 18 der Saugdüse 17 positioniert werden kann und, in dieser Stellung positioniert, ebenfalls das Entstehen einer Saugluftströmung SLSu verhindert.An alternative embodiment of a shielding device is in Figure 4 shown.
In this case, a separate shielding device 22C is provided in the area of the workstation 2, the movably mounted sealing element 22C of which can be positioned below the suction opening 18 of the suction nozzle 17 if required and, positioned in this position, also prevents the formation of a suction air flow SLSu.

Wie in Fig.2 dargestellt, ist die Saugdüse 17 im Bereich ihres Saugdüsenkopfes 31 mit einer Abschirmeinrichtung 19A ausgestattet, die über ein beweglich gelagertes Dichtelement 22A verfügt.
Das vorzugsweise mittels üblicher Befestigungselemente an der Unterseite 20 des Saugdüsenkopfes 31 festgelegte Dichtelement 22A wird dabei, zum Beispiel durch ein Federelement 21, so beaufschlagt, dass es beim Ein- oder Ausschwenken der Saugdüse 17 in ihre/aus ihrer Fadenendaufnahmestellung bedarfsgerecht ausweichen kann. Das heißt, die Saugdüse 17 kann problemlos die vor der Kontaktwalze 9 angeordneten Abweis- und Einfädelkonturen 32 passieren. Das Federelement 21 sorgt außerdem dafür, dass bei in Fadenaufnahmestellung positionierter Saugdüse 17 das Dichtelement 22A stets zuverlässig an der langsam in Abwickelrichtung Rab rotierenden Kontaktwalze 9 anliegt. Das bei in Fadenaufnahmestellung positionierter Saugdüse 17 an der Kontaktwalze 9, zum Beispiel einer Spulenantriebswalze, anliegende Dichtelement 22A verhindert dabei zuverlässig, dass, wie bislang beim Stand der Technik üblich (siehe hierzu Fig.5), unterhalb der Saugdüse 17, das heißt, zwischen dem Saugdüsenkopf 31 und der Kontaktwalze 9 eine untere Saugluftströmung SLSu entstehen kann, die, wie vorstehend bereits erläutert, die Strömungsverhältnisse im Bereich der Ansaugöffnung 18 des Saugdüsenkopfes 31 der Saugdüse 17 negativ beeinflussen würde.As in Fig.2 In the region of its suction nozzle head 31, the suction nozzle 17 is equipped with a shielding device 19A which has a movably mounted sealing element 22A.
The preferably by means of conventional fasteners on the underside 20 of the Saugdüsenkopfes 31 defined sealing element 22A is thereby, for example, by a spring element 21, so acted that it can dodge as required in the case of pivoting the suction nozzle 17 in its / from its Fadenendaufnahmestellung. That is, the suction nozzle 17 can easily pass the deflecting and threading contours 32 arranged in front of the contact roller 9. The spring element 21 also provides ensure that when positioned in the thread take-up position suction nozzle 17, the sealing element 22A always reliably applied to the slowly in the unwinding R from rotating contact roller 9. The positioned in the thread receiving position of the suction nozzle 17 on the contact roller 9, for example, a coil drive roller, fitting sealing element 22A reliably prevents that, as usual in the prior art (see Figure 5 ), below the suction nozzle 17, that is, between the Saugdüsenkopf 31 and the contact roller 9, a lower Saugluftströmung SLSu may arise, which, as already explained above, the flow conditions in the suction port 18 of the Saugdüsenkopfes 31 of the suction nozzle 17 would adversely affect.

Wie in Fig.2 weiter dargestellt, führt das an der Kontaktwalze 9 positionierte Dichtelement 22A dazu, dass die im Inneren der Saugdüse 17 anstehende Saugluftströmung SLS eine relativ starke obere Saugluftströmung SLSo initiiert. Diese, an der Oberfläche der langsam in Abwickelrichtung AW rotierende Kreuzspule 5 entlang streichende Saugluftströmung SLSo begünstigt einerseits das Ablösen des Fadenendes von der Oberfläche der Kreuzspule 5 und sorgt anderseits dafür, dass der abgelöste Oberfaden sicher in die Saugdüse 17 eingesaugt wird. Der in die Saugdüse 17 eingesaugte Oberfaden kann anschließend durch die nach unten schwenkende Saugdüse 17 sicher an die arbeitsstelleneigene, pneumatische Fadenverbindungseinrichtung 42 überführt werden.
Anstelle des vorstehend beschriebenen Federelements 21, das das Dichtelement 22A beaufschlagt, kann grundsätzlich allerdings auch eine schwerkraftbedingte Ausrichtung des Dichtelements 22A vorgesehen werden. Das heißt, das Dichtelement 22A ist dann so an der Unterseite 20 des Saugdüsenkopfes 31 angeordnet, dass ein frei bewegliches Teil des Dichtelements 224 schwerkraftbedingt nach unten klappt und bei in Fadenendaufnahmestellung positionierter Saugdüse 17 auf der Kontaktwalze 9 aufliegt.As in Fig.2 Furthermore, the sealing element 22A positioned on the contact roller 9 causes the suction air flow SLS present in the interior of the suction nozzle 17 to initiate a relatively strong upper suction air flow SLSo. This, on the surface of slowly rotating in the unwinding AW cross-wound bobbin 5 along sweeping Saugluftströmung SLSo on the one hand promotes the detachment of the thread end of the surface of the cheese 5 and on the other hand ensures that the detached upper thread is securely sucked into the suction nozzle 17. The upper thread sucked into the suction nozzle 17 can then be safely transferred by the downwardly pivoting suction nozzle 17 to the workstation's own pneumatic thread connecting device 42.
However, in principle, a gravitational alignment of the sealing element 22A may be provided instead of the above-described spring element 21, which acts on the sealing element 22A. That is, the sealing element 22A is then arranged on the underside 20 of the Saugdüsenkopfes 31, that a freely movable part of the sealing element 224 gravity causes down and rests on the contact roller 9 when positioned in Fadenendaufnahmestellung suction nozzle 17.

Der Vollständigkeit halber und um Irritationen zu vermeiden, ist in Bezug auf die Figuren 2 - 4 außerdem auszuführen, dass der Fingerfadenführer 13 der Fadenchangiereinrichtung 10 jeweils in einer Sicherheitsstellung dargestellt ist.
In dieser Sicherheitsstellung ist der Fingerfadenführer 13, um eine Kollision mit der in die Fadenendaufnahmestellung einschwenkende Saugdüse 17 zu vermeiden, jeweils in einer äußeren Endstellung positioniert.For the sake of completeness and to avoid irritation, in relation to the Figures 2-4 also to be executed, that the finger thread guide 13 of the Fadenchangiereinrichtung 10 is shown in each case in a safety position.
In this safety position, the finger thread guide 13, in order to avoid a collision with the suction nozzle 17 pivoting into the yarn end receiving position, is positioned in each case in an outer end position.

Während des Spinnbetriebes ist der Fingerfadenführer 13 der Fadenchangiereinrichtung 10 selbstverständlich, wie in Fig.1 dargestellt, oberhalb der Abweis- und Einfädelkonturen 32 tätig und traversiert den auflaufenden Faden16 über die Oberfläche der Kreuzspule 5.During the spinning operation, the finger thread guide 13 of the thread switching device 10 is understood, as in Fig.1 shown, above the deflecting and Einfädelkonturen 32 active and traversing the auflaufenden Faden16 over the surface of the cheese 5.

Die Fig.3 zeigt eine Abschirmeinrichtung 19B, die in ihrer Funktion etwa der vorstehend anhand der Fig.2 beschriebenen Abschirmeinrichtung 19A entspricht.
Bei der Ausführungsform gemäß Fig.3 ist die Abschirmeinrichtung 19B ebenfalls an der Unterseite 20 des Saugdüsenkopfes 31 angeordnet. Das Dichtelement 22B der Abschirmeinrichtung 19B ist jetzt allerdings aus einem elastischen Werkstoff, beispielsweise einem Gummiwerkstoff, gefertigt.
Auch das elastische Dichtelement 22B kann, wie vorstehend bereits im Zusammenhang mit der Abschirmeinrichtung 19A erläutert, beim Ein- oder Ausschwenken der Saugdüse 17 problemlos den vor der Kontaktwalze 9 installierten Abweis- und Einfädelkonturen 32 ausweichen.
Wie in Fig.3 dargestellt, sorgt bei in Fadenaufnahmestellung positionierter Saugdüse 17 das an der Kontaktwalze 9 anliegende elastische Dichtelement 22B zuverlässig dafür, dass unterhalb der Saugdüse 17 keine untere Saugluftströmung SLSu entstehen kann. Das bedeutet, auch die in Fig.3 dargestellte Abschirmeinrichtung 19B mit ihrem elastischen Dichtelement 22B sorgt zuverlässig dafür, dass die im Inneren der unterdruckbeaufschlagten Saugdüse 17 anstehende Saugluftströmung SLS keine untere Saugluftströmung SLSu initiiert, sondern dass eine relativ starke obere Saugluftströmung SLSo entsteht, die bei der Fadenaufnahme die bereits vorstehend beschriebenen Vorteile aufweist.The Figure 3 shows a shielding device 19B, which in its function as the above with reference to the Fig.2 Shielding device 19A described corresponds.
In the embodiment according to Figure 3 the shielding device 19B is also arranged on the underside 20 of the suction nozzle head 31. However, the sealing element 22B of the shielding device 19B is now made of an elastic material, for example a rubber material.
Also, the elastic sealing element 22B, as already explained above in connection with the shielding 19A, when dipping or swiveling the suction nozzle 17 easily avoid the installed in front of the contact roller 9 deflecting and threading contours 32.
As in Figure 3 shown positioned in the thread receiving position of the suction nozzle 17, the voltage applied to the contact roller 9 elastic sealing element 22B reliably ensures that below the suction nozzle 17 no lower Saugluftströmung SLSu can arise. That means also the in Figure 3 Shielding device 19B shown with its elastic sealing element 22B reliably ensures that the suction air flow SLS present in the interior of the vacuum-pressurized suction nozzle 17 does not initiate a lower suction air flow SLSu, but rather that a relatively strong upper suction air flow SLSo arises, which has the advantages already described above for the yarn take-up.

Die in Fig.4 schematisch dargestellte, alternative Abschirmeinrichtung 19C verfügt über ein separat angeordnetes Dichtelement 22C, das im Bedarfsfall, beispielsweise durch eine Antriebseinrichtung 23, so unterhalb der Saugdüse 17 positioniert werden kann, dass zwischen der Saugdüse 17 und der Kontaktwalze 9 zuverlässig das Entstehen einer unteren Saugluftströmung SLSu verhindert wird.
Bezüglich der exakten Ausführungsform der in Fig.4 lediglich schematisch dargestellten Abschirmeinrichtung 19C sind zahlreiche, zum Teil recht unterschiedliche Ausführungsformen vorstellbar.In the Figure 4 schematically shown, alternative shielding 19C has a separately arranged sealing element 22C, which can be positioned below the suction nozzle 17, if necessary, for example by a drive device 23, that between the suction nozzle 17 and the contact roller 9 reliably prevents the emergence of a lower Saugluftströmung SLSu becomes.
With regard to the exact embodiment of the in Figure 4 only schematically illustrated shielding 19C are numerous, sometimes quite different embodiments conceivable.

Das separate Dichtelement 22C könnte beispielsweise durch eine Antriebseinrichtung 23 von oben in seine Arbeitsstellung auf der Kontaktwalze 9 eingeschoben werden. Allerdings ist auch vorstellbar, dass das Dichtelement 22C durch eine Antriebseinrichtung 23 bedarfsgerecht eingeschwenkt wird.
Es ist beispielsweise denkbar, dass das Dichtelement 22C zweiteilig ausgebildet ist.
In einem solchen Fall könnten die beiden Einzelelemente jeweils von der Seite in ihre Arbeitsstellung auf der Kontaktwalze 2 eingeschwenkt werden.The separate sealing element 22C could, for example, be pushed by a drive device 23 from above into its working position on the contact roller 9. However, it is also conceivable that the sealing element 22C is swiveled in as required by a drive device 23.
It is conceivable, for example, that the sealing element 22C is formed in two parts.
In such a case, the two individual elements could each be pivoted from the side into its working position on the contact roller 2.

Bezüglich der anhand der Fig.4 beschriebenen Ausführungsform einer Abschirmeinrichtung 19C mit einem separaten Dichtelement 22c ist letztendlich nicht endscheidend, wie eine solche Abschirmeinrichtung genau ausgebildet ist, sondern es ist lediglich wichtig, dass das Dichtelement 22C der Abschirmeinrichtung 19C während des Spulbetriebes so positioniert werden kann, dass der Spulbetrieb in keiner Weise negativ beeinflusst wird und dass in der Betriebsstellung des Dichtelementes 22C gewährleistet ist, dass das Dichtelement 22 bei der Fadenendaufnahme so positionierbar ist, dass das Entstehen einer unteren Saugluftströmung SLSu zuverlässig verhindert wird.Regarding the basis of the Figure 4 described embodiment of a shielding device 19C with a separate sealing element 22c is ultimately not final, as such a shielding is precisely formed, but it is only important that the sealing element 22C of the shielding 19C can be positioned during the winding operation so that the winding operation in any way is negatively influenced and that is ensured in the operating position of the sealing element 22C that the sealing element 22 is positioned at the yarn end receiving so that the emergence of a lower Saugluftströmung SLSu is reliably prevented.

Claims (9)

  1. Workstation (2) of a textile machine (1) producing cross-wound bobbins comprising a contact roller (9) and a suction nozzle (17), to which negative pressure is applied and which is pivotably mounted, comprising a suction opening (18) at the suction nozzle head, which is positioned for receiving a thread end that has run onto the cross-wound bobbin (5) in the region of the surface of the cross-wound bobbin (5) mounted rotatably in a bobbin frame (8),
    characterised in that
    a shielding device (19A, 19B, 19C) is provided which is arranged in the operating position of the suction nozzle (17) between the suction opening (18) of the suction nozzle (17) and the contact roller (9) for preventing the inflow of air along the lower side of the suction nozzle (17) towards the suction opening (18) subject to suction.
  2. Workstation according to claim 1, characterised in that the shielding device (19A, 19B, 19C) with a suction nozzle (17) positioned in the thread take-up position bears on the contact roller (9).
  3. Workstation according to claim 1 or 2, characterised in that the shielding device (19A, 19B) is installed on the lower side (20) of the suction nozzle head (31) so that with a suction nozzle (17) positioned in the thread take-up position a sealing element (22) of the shielding device (19A, 19B) corresponds with a contact roller (9) arranged underneath the suction nozzle (17).
  4. Workstation according to claim 3, characterised in that the shielding device (19A) is designed as a foldably mounted sealing element (22A).
  5. Workstation according to claim 4, characterised in that the foldably mounted sealing element (22A) is pressurised by a spring means (21).
  6. Workstation according to claim 4, characterised in that the foldably mounted sealing element (22A) is designed so that with a suction nozzle (17) positioned in operating position it bears on the contact roller (9) due to gravity.
  7. Workstation according to claim 3, characterised in that the shielding device (19B) is designed as an elastic sealing element (22B).
  8. Workstation according to claim 7, characterised in that the elastic sealing element (22B) is designed as a sealing lip made of rubber.
  9. Workstation according to claim 1, characterised in that the shielding device (19C) comprises a sealing element (22C) which is mounted movably in the region of the workstation (2) of the textile machine (1) producing cross-wound bobbins and if necessary can be positioned below the suction opening (18) of the suction nozzle (17), bearing on the contact roller (9).
EP14002016.5A 2013-07-11 2014-06-11 Workstation of a textile machine for creating cross-wound spools Active EP2824054B1 (en)

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DE102014009203A1 (en) * 2014-06-20 2015-12-24 Saurer Germany Gmbh & Co. Kg Workplace of a cheese-producing textile machine
JP2019031381A (en) * 2017-08-09 2019-02-28 村田機械株式会社 Yarn draw-out device and yarn winder

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CN104276451B (en) 2018-02-02
JP6465575B2 (en) 2019-02-06
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CN104276451A (en) 2015-01-14
IN2014MU02194A (en) 2015-10-09
EP2824054A1 (en) 2015-01-14

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