EP0468390B1 - Method and device for forming a spare lap with a thread end on a bobbin of a textile machine - Google Patents

Method and device for forming a spare lap with a thread end on a bobbin of a textile machine Download PDF

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Publication number
EP0468390B1
EP0468390B1 EP91112208A EP91112208A EP0468390B1 EP 0468390 B1 EP0468390 B1 EP 0468390B1 EP 91112208 A EP91112208 A EP 91112208A EP 91112208 A EP91112208 A EP 91112208A EP 0468390 B1 EP0468390 B1 EP 0468390B1
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EP
European Patent Office
Prior art keywords
thread
bobbin
reserve
sleeve
thread end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91112208A
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German (de)
French (fr)
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EP0468390A3 (en
EP0468390A2 (en
Inventor
Dietmar Greis
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
Rieter Ingolstadt Spinnereimaschinenbau AG
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Publication of EP0468390A2 publication Critical patent/EP0468390A2/en
Publication of EP0468390A3 publication Critical patent/EP0468390A3/en
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Publication of EP0468390B1 publication Critical patent/EP0468390B1/en
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Classifications

    • 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
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/34—Traversing devices; Package-shaping arrangements for laying subsidiary winding, e.g. transfer tails
    • B65H54/346—Traversing devices; Package-shaping arrangements for laying subsidiary winding, e.g. transfer tails on or outwardly of the fully wound yarn package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/04—Kinds or types
    • B65H75/08—Kinds or types of circular or polygonal cross-section
    • B65H75/10—Kinds or types of circular or polygonal cross-section without flanges, e.g. cop tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • 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 method for producing a thread end reserve on a package, wherein after reaching a certain diameter of the bobbin or quantity of thread, the thread is passed over the outer surface and then back again onto the outer surface of the package.
  • End-of-thread reserves in particular in the case of conical sleeves, in which the end-of-thread reserve on the part of the sleeve which is the lesser Has the diameter, is stored, have the disadvantage that when handling the bobbin there is a risk that the thread end reserve slips off the sleeve. This can damage the end of the thread and the advantage of finding the end of the thread more easily is lost.
  • the object of the present invention is to propose a method for producing a thread end reserve, with the aid of which it is possible to produce a thread end reserve in particular also with conical sleeves in such a way that the thread end reserve is prevented from detaching from the bobbin.
  • the thread end reserve is easy to grasp. This is achieved in that the sleeve is at least touched by the thread of the thread reserve.
  • the position of the thread end reserve is defined in relation to the sleeve, so that in particular the automatic search and detection is possible. It is particularly advantageous to deposit the thread at a defined point on the sleeve. This can be done particularly easily when using a sleeve equipped with a groove.
  • the search and detection of the thread end reserve is also possible on the outer surface of the bobbin, since the thread end comes to rest on the outer surface of the bobbin.
  • the end of the thread end reserve can be securely fixed.
  • the end of the thread sticks to the spool with its hairy surface.
  • Complex measures and devices, such as have been used so far and which ultimately remained unsatisfactory, can be avoided. It is particularly favorable if the thread end is pressed onto the outer surface of the bobbin after it has been returned to it. This creates an intensive contact that interlocks the thread end with the surface of the bobbin and thereby fixes it. This is done particularly easily by means of the friction roller, which, for example serves to drive the bobbin during the formation of the thread end reserve.
  • the thread end reserve is also placed on the sleeve with tension.
  • a well tensioned thread end reserve is less likely to slip on the core.
  • Another advantage of the formation of the thread end reserve according to the invention is that a substantial part of the thread end reserve can also be laid on the outer surface of the bobbin. As a result, the thread end reserve on the sleeve takes up very little space. In addition, the less thread that is deposited on the sleeve, the smaller the risk of the thread end reserve slipping off the sleeve. If a few turns are deposited, the thread end reserve can be grasped easily and quickly and there is security against the thread end reserve slipping off the sleeve.
  • a further advantageous measure is to lay the thread parallel to the edge of the bobbin to form the end thread reserve before it is led down from the outer surface of the bobbin. This prevents the thread on the bobbin from losing its tension, which could loosen the thread end reserve and thereby release it from the sleeve. It is particularly favorable to carry out the parallel laying at a distance from the edge of the spool so that it cannot slip off the spool.
  • the bobbin is shut down to form the thread end reserve.
  • the thread end reserve is particularly time-saving without having to stop the bobbin or bobbin.
  • the thread can advantageously be guided by the thread guide for normal winding.
  • the device of DE 3734478 A1 is particularly suitable for this purpose. The thread is then separated after the final thread reserve has been formed.
  • a thread end reserve By using a sleeve with a groove, it is possible to form a thread end reserve so that it is largely safe from detaching from the sleeve. This is particularly advantageous with conical sleeves.
  • the thread end reserve is usually formed on the part of the sleeve with the smaller diameter, where slipping of the thread end reserve leads to its detachment. This can be prevented by the presence of a groove. This form of diameter change is the cheapest because it does not hinder the rolling of the sleeve on the friction roller.
  • a groove extending around the entire circumference of the sleeve is particularly advantageous because the difference in the circumferential length of the groove base and sleeve is as large as possible.
  • a piece of thread lying in the groove can only slip out of the groove if it increases in length. However, since it is practically impossible to change the length of the thread, the thread is fixed in the groove. The end thread reserve can thereby be held on the sleeve, since the other turns of the end thread reserve are kept under tension. Further advantageous embodiments of the invention are described in the subclaims.
  • the conical bobbin of FIG. 1 has a thread reserve 31 formed in a known manner at the larger end of its sleeve 2 and a thread end reserve 4 according to the invention at the other end of the sleeve 2, which is equipped with a groove 20.
  • the bobbin is not in it whole width.
  • the maintenance machine In order to form the thread end reserve, the maintenance machine then first searches for the thread end of the idle bobbin, the thread end reserve is formed and the bobbin is removed from its winding station.
  • the bobbin in FIG. 1 is finished with a thread end reserve 4 and has already been removed from the bobbin.
  • thread is first unwound from the bobbin and taken up in a suction device.
  • the bobbin is then rotated in the winding direction without laying the thread, whereby parallel turns 41 are formed on the bobbin.
  • This defined depositing of the thread prevents a loop which is deposited on the spool without tension from being formed when the thread is brought down to form the thread end reserve.
  • the thread is guided laterally over the edge of the bobbin by a thread guide, whereby the thread reserve 4 is wound around the sleeve when the bobbin is rotated further before being guided back in the direction of the bobbin by the thread guide and from there on the bobbin Shell surface 10 is wound.
  • the beginning 42 of the parallel windings 41 is shown, where the thread from the normal laying into the parallel turns 41.
  • a piece of thread 43 is guided from the parallel turns to the bobbin edge 12.
  • the thread end 31 is guided on the lateral surface 10 of the bobbin 1 in the direction of the bobbin center and is deposited thereon.
  • the end section 310 of the thread lies against the outer surface 10 of the bobbin. Due to its hairiness, the thread end lies firmly on the outer surface of the bobbin. Since the entire surface of the bobbin is also hairy, there is no danger that the thread end or the end section 310 will become detached from the outer surface 10 of the bobbin.
  • the thread end reserve 4 is thereby secured against slipping off the sleeve 2.
  • the thread is kept under tension until it is returned to the outer surface of the bobbin. If the thread end reserve is at least slightly under tension, it can be prevented more reliably from detaching from the sleeve.
  • the thread end reserve 4 deposited on the sleeve is deposited on the sleeve in a defined manner. This is particularly easy with the help of the groove 20. This defined positioning of the thread end reserve on the sleeve ensures during further processing of the bobbin that the thread end reserve can be found and gripped both by hand and by machine.
  • the thread end reserve 4 which runs at a distance from the front end 120 of the bobbin, the parts of the thread end reserve which lead from the bobbin edge 12 to the sleeve 2 and back again have a distance from the end end 120 of the bobbin. This makes it particularly easy to grip, in particular to suck off the thread reserve for further processing of the bobbin.
  • the thread end cover By laying the thread end 30 on the outer surface 10 of the bobbin 1, the thread end cover can also be removed from the outer surface of the bobbin.
  • Another measure to securely fix the thread end reserve is that, the thread piece 43 and the thread end 30 as much as possible steep angle to the spool edge and from this back to and from the outer surface. For this purpose, it is necessary to lay the parallel windings 41 at a greater distance from the coil edge 12.
  • Figure 2 shows a side view of a bobbin similar to that of Figure 1.
  • the wrap of the sleeve in Figure 2 is about 2.5 times the circumference the sleeve.
  • a crossover between the descending and ascending part of the thread end reserve, as in FIG. 1, is not necessary.
  • the thread end 30 deposited on the outer surface of the bobbin loops around the bobbin only to about 1/4 of its circumferential length. A short thread end ensures that the thread end reserve is easily detached from the bobbin.
  • a secure hold of the thread end and thus the thread end reserve is ensured in that after the thread end has been placed on the bobbin, the thread end is rolled over by a pressure roller and pressed onto the outer surface. As a result, the thread end interlocks with the surface of the bobbin, so that it does not slide off.
  • the drive roller 51 which rotates the bobbin during the thread search, is advantageously used as the pressure roller.
  • FIG. 3 shows a side view of a bobbin according to the prior art, in which the thread end reserve 4, after being guided down from the outer surface 10 of the bobbin, is returned to the outer surface without touching the sleeve 2.
  • FIG. 4 shows a winding unit 11.
  • a coil 1 is held by a coil arm 110. This is raised from its friction roller 111 to stop. Another thread is not replenished by the thread delivery point 112.
  • a maintenance carriage 6 has moved into position in front of the winding unit 11. This has means for searching the thread on the stopped spool 1, means for driving the spool and means for laying the thread on the spool. After the bobbin has stopped, after a predetermined length or amount of thread has been wound is, the maintenance carriage 6 has brought itself into position in front of the winding unit. The bobbin is lifted from its normal drive means, the friction roller 111, which can also be used to lay the thread on the bobbin.
  • the thread end that has been wound on the outer surface of the bobbin must first be searched for and seized. This is done by supplying the spool with a drive means, the drive roller 51, with which the service vehicle is able to turn the spool in both directions of rotation. Subsequently or at the same time, a means for searching the thread end is delivered to the outer surface of the bobbin from the maintenance trolley. This is the pneumatic suction nozzle 65, which is brought close to the outer surface of the coil and thus sucks the surface thereof. The suction nozzle 65 is designed so that it sucks the entire coil width.
  • a monitoring device (not shown), which is arranged within an air duct of the pneumatic suction nozzle, determines when a sufficient amount of thread has been unwound from the bobbin. The suction nozzle then swivels back from the outer surface of the bobbin, thereby forming a thread web 7 extending from the suction of the thread to the outer surface of the bobbin. After a predetermined amount of yarn has been unwound from the bobbin, the drive roller 51 is stopped.
  • a thread guide swings into the thread path 7 for laying the thread.
  • This is designed as a threaded spindle.
  • the thread path 7 is selected such that after the thread 3 has been brought down to form the thread end reserve on the sleeve 2, the thread remains in the region of the thread guide. This ensures that the thread can be guided back onto the outer surface of the bobbin by the thread guide. It is particularly favorable to bring the thread guide close to the surface of the bobbin, because this makes it easier for the thread to be returned to the outer surface.
  • the drive roller 51 is set in motion in the opposite direction of rotation, so that the thread is first wound up again on the outer surface of the bobbin.
  • the spindle is set in motion, so that the thread is passed over the edge of the bobbin and falls onto the sleeve.
  • the resulting excess thread is absorbed by the suction of the pneumatic suction nozzle 65.
  • the spool is rotated in the winding direction by the drive roller 51 to form the thread end reserve. Depending on the duration, more or less end thread reserve is formed.
  • the spindle is set in motion in the opposite direction, so that the other side of the spindle flank guides the thread over the bobbin edge onto the outer surface of the bobbin.
  • the thread is held taut by the suction nozzle during the entire process. Due to the rotating bobbin, the thread previously drawn into the suction nozzle is deposited on the bobbin. If it is to be achieved that as little thread as possible is deposited on the outer surface of the bobbin, the thread can be cut.
  • the thread end is wound over by it and thereby securely fixed on the bobbin. This can also be done by lowering the spool onto its friction roller 111, which drives the spool.
  • the bobbin can be removed from the bobbin from a bobbin changing carriage or from the maintenance carriage in a known manner and replaced by an empty tube.
  • Figure 6 shows a conical crimp sleeve. At its large diameter end it has a marking 25 for receiving the thread reserve. At its end with the smaller diameter, the sleeve is equipped with a change in diameter, which is designed as a groove. This end has a crimp, for better thread running during further processing of the bobbin. For better running of the thread, the area of the flanging 26 is designed so that the thread can run over the end of the sleeve with little friction. With paper cores, this is done by grinding the surface.
  • the sleeve 2 is furthermore provided with a particularly good surface quality or with a low coefficient of friction in the area between the groove and the area in which the turns of the bobbin come to rest. This ensures that the thread end reserve comes to rest safely in the area of the groove. If the sleeve is low-friction in the area between the groove and the front end of the bobbin, there is no danger that a thread end reserve thread will be formed outside the groove. This could detach itself from the sleeve over time and slide towards the sleeve end, as a result of which the thread end reserve would lose its tension and there would be a risk of it detaching from the sleeve.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Herstellen einer Fadenendreserve an einer Kreuzspule, wobei nach Erreichen eines bestimmten Durchmessers der Spule oder Menge des Fadens der Faden über die Mantelfläche hinweg und anschließend wieder zurück auf die Mantelfläche der Kreuzspule geführt wird.The invention relates to a method for producing a thread end reserve on a package, wherein after reaching a certain diameter of the bobbin or quantity of thread, the thread is passed over the outer surface and then back again onto the outer surface of the package.

Aus der DE-OS 17 60 243 ist es bekannt, auf dem oberen Ende der Spulenhülse einige Parallelwindungen aufzuwickeln, so daß das Fadenende der Spule leicht gefunden und mühelos erfaßt werden kann. Aus der DE-OS 25 06 930 ist es bekannt, mittels Sauggreifern am Hülsenende das Fadenende aufzuwickeln, wobei die Textilspule wieder in Wickelrichtung gedreht wird und der Sauggreifer am Ende der Spulenhülse stehen bleibt.From DE-OS 17 60 243 it is known to wind up some parallel windings on the upper end of the bobbin tube, so that the thread end of the bobbin can be easily found and easily grasped. From DE-OS 25 06 930 it is known to wind up the thread end by means of suction pads on the sleeve end, the textile spool being rotated again in the winding direction and the suction pad remaining at the end of the bobbin tube.

Aus der DE 36 02 574 ist es bekannt, mit Hilfe eines Bedinungsaggregats, das mit einer Fadenansaugvorrichtung und einer Fadenleitvorrichtung ausgestattet ist, den angesaugten, für die Fadenendreserve vorgesehenen Faden durch die Fadenleitvorrichtung in den Zwickel, der von der Hülse- und Spulenstirnseite gebildet wird, zu verlegen.From DE 36 02 574 it is known, with the aid of a conditioning unit, which is equipped with a thread suction device and a thread guiding device, the sucked thread intended for the thread end reserve through the thread guiding device into the gusset, which is formed by the sleeve and bobbin end faces, relocate.

Beim Herstellen von Fadenreserven ist es weiter bekannt, zu deren Festlegen auf der Hülse die ersten Windungen der Fadenreserve von den folgenden zu Überwinden und dadurch auf der Hülse festzulegen.In the manufacture of thread reserves, it is further known to overcome the first turns of the thread reserve from the following ones to fix them on the sleeve and thereby to fix them on the sleeve.

Fadenendreserven insbesondere bei konischen Hülsen, bei denen die Fadenendreserve auf dem Teil der Hülse, die den geringeren Durchmesser besitzt, abgelegt wird, haben den Nachteil, daß beim Handhaben der Spule die Gefahr besteht, daß die Fadenendreserve von der Hülse abrutscht. Dadurch kann das Fadenende geschädigt werden, und der Vorteil des leichteren Auffinden des Fadenendes geht verloren. Es ist bekannt, im Bereich der Ablage der Anfangsfadenreserve Markierungen in Form von flachen Eindrückungen auf der Hülse anzubringen. Deren Aufgabe besteht hauptsächlich darin, die Oberfläche der Hülse für das Festziehen der Fadenreserve vorzubereiten. Ein Verrutschen der Reservewindungen auf der Hülse kann aufgrund ihrer flachen Form kaum verhindert werden. Dies ist auch nicht notwendig, da die Fadenreserve anschließend überwickelt und dadurch festgelegt wird.End-of-thread reserves, in particular in the case of conical sleeves, in which the end-of-thread reserve on the part of the sleeve which is the lesser Has the diameter, is stored, have the disadvantage that when handling the bobbin there is a risk that the thread end reserve slips off the sleeve. This can damage the end of the thread and the advantage of finding the end of the thread more easily is lost. It is known to make markings in the form of flat indentations on the sleeve in the area of the deposit of the initial thread reserve. Their main task is to prepare the surface of the sleeve for tightening the thread reserve. Slipping of the reserve windings on the sleeve can hardly be prevented due to their flat shape. This is also not necessary, since the thread reserve is then overwound and thereby fixed.

Aus der DE-A 37 37 122 ist ein Verfahren zum Herstellen einer Fadenendreserve bekannt, bei dem nach Beendigung der Spulenbildung der Faden über die Mantelfläche der Spule hinweg auf die Stirnseite der Spule geführt wird, wovon er anschließend wieder auf die Mantelfläche der Spule gebracht wird. Dabei kann der Faden auch die Hülse der Spule berühren oder umwinden. Das hier gezeigte Verfahren hat den Nachteil, daß ohne Rücksicht darauf, wie der Faden auf der Mantelfläche der Spule abgelegt ist, er von dieser heruntergeführt wird. Dies kann dazu führen, daß das letzte Stück auf der Mantelfläche der Spule in Form eines Bogens vorliegt, so daß nach dem Herunterführen des Fadens dieser das Bogenstück mit herabziehen kann, wodurch der Faden an Spannung verliert und die ganze Fadenendreserve von der Stirnseite der Spule abfallen kann. Dies muß dabei nicht sogleich geschehen, sondern das kann während des weiteren Transportes der fertigen Spule erfolgen. Ein weiterer Nachteil besteht darin, daß der Faden, wenn er auf die Hülse aufgewunden wird, insbesonderes wenn es sich um eine konische Hülse handelt, ebenfalls an Spannung verliert, da er die Möglichkeit hat, in Richtung des kleineren Durchmessers der Hülse zu gleiten, wodurch seine Umfangslänge größer wird als der Durchmesser der Hülse an dieser Stelle, so daß er ohne Spannung auf der Hülse liegt. Im weiteren Transport der Spule kann sich die Fadenendreserve im ungünstigsten Fall vollständig von der Spule ablösen.From DE-A 37 37 122 a method for producing a thread end reserve is known, in which after the end of the formation of the bobbin, the thread is guided over the outer surface of the bobbin onto the end face of the bobbin, from which it is then brought back onto the outer surface of the bobbin . The thread can also touch or wind around the sleeve of the bobbin. The method shown here has the disadvantage that regardless of how the thread is placed on the outer surface of the bobbin, it is guided down from it. This can lead to the fact that the last piece is present in the form of an arc on the outer surface of the bobbin, so that after the thread has been guided down, the bend can also pull the arc piece down, as a result of which the thread loses tension and the entire thread reserve falls off from the end face of the bobbin can. This does not have to happen immediately, but this can take place during the further transport of the finished coil. Another disadvantage is that when the thread is wound onto the sleeve, especially if it is a conical sleeve, it also loses tension because it has the possibility of sliding in the direction of the smaller diameter of the sleeve, which causes its circumferential length becomes larger than the diameter of the sleeve at this point, so that it lies on the sleeve without tension. In further transport In the worst case, the bobbin end thread reserve can completely detach from the bobbin.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zum Herstellen einer Fadenendreserve vorzuschlagen, mit dessen Hilfe es möglich ist, eine Fadenendreserve insbesondere auch bei konischen Hülsen so herzustellen, daß ein Ablösen der Fadenendreserve von der Spule verhindert wird.The object of the present invention is to propose a method for producing a thread end reserve, with the aid of which it is possible to produce a thread end reserve in particular also with conical sleeves in such a way that the thread end reserve is prevented from detaching from the bobbin.

Diese Aufgabe wird durch das erfindungsgemäße Verfahren zum Bilden einer Fadenendreserve gemäß dem Anspruch 1 gelöst.This object is achieved by the method according to the invention for forming a thread end reserve according to claim 1.

Für die Weiterverarbeitung der Spule ist es von Vorteil, wenn die Fadenendreserve leicht zu erfassen ist. Dies wird dadurch erreicht, daß die Hülse wenigstens vom Faden der Fadenendreserve berührt wird. Die Position der Fadenendreserve wird dadurch in Bezug auf die Hülse definiert, so daß insbesondere das automatische Suchen und Erfassen möglich ist. Besonders vorteilhaft ist es, dabei den Faden an einer definierten Stelle auf der Hülse abzulegen. Besonders einfach kann dies bei Verwendung einer mit einer Rille ausgestatteten Hülse erfolgen. Das Suchen und Erfassen der Fadenendreserve ist bei einer gemäß dem Verfahren der Erfindung gebildeten Spule zusätzlich auch auf der Mantelfläche der Spule möglich, da das Fadenende auf der Mantelfläche der Spule zu liegen kommt.For further processing of the bobbin, it is advantageous if the thread end reserve is easy to grasp. This is achieved in that the sleeve is at least touched by the thread of the thread reserve. The position of the thread end reserve is defined in relation to the sleeve, so that in particular the automatic search and detection is possible. It is particularly advantageous to deposit the thread at a defined point on the sleeve. This can be done particularly easily when using a sleeve equipped with a groove. In the case of a bobbin formed according to the method of the invention, the search and detection of the thread end reserve is also possible on the outer surface of the bobbin, since the thread end comes to rest on the outer surface of the bobbin.

Durch das Verlegen des Fadens zurück auf die Umfangsfläche der Spule kann das Ende der Fadenendreserve sicher fixiert werden. Das Fadenende haftet dabei mit seiner haarigen Oberfläche auf der der Spule. Aufwendige Maßnahmen und Vorrichtungen, wie sie bisher verwendet wurden und die letztlich unbefriedigend blieben, können vermieden werden. Besonders günstig ist es, wenn das Fadenende nach dem Zurückführen auf die Mantelfläche der Spule auf diese aufgedrückt wird. Dadurch entsteht ein intensiver Kontakt, der das Fadenende mit der Oberfläche der Spule verzahnt und dadurch fixiert. Besonders einfach geschieht dies mittels der Friktionswalze, die z.B. während der Bildung der Fadenendreserve zum Antrieb der Spule dient.By laying the thread back on the circumferential surface of the bobbin, the end of the thread end reserve can be securely fixed. The end of the thread sticks to the spool with its hairy surface. Complex measures and devices, such as have been used so far and which ultimately remained unsatisfactory, can be avoided. It is particularly favorable if the thread end is pressed onto the outer surface of the bobbin after it has been returned to it. This creates an intensive contact that interlocks the thread end with the surface of the bobbin and thereby fixes it. This is done particularly easily by means of the friction roller, which, for example serves to drive the bobbin during the formation of the thread end reserve.

Besonders günstig ist es, wenn beim Ablegen der Faden unter Spannung steht, weil dadurch der Faden auf seiner gesamten Länge mit der Spulenoberfläche in Kontakt kommt. Steht der Faden unter Spannung, wird auch die Fadenendreserve mit Spannung auf der Hülse abgelegt. Eine gut gespannte Fadenendreserve neigt weniger zum Rutschen auf der Hülse. Ein weiterer Vorteil der erfindungsgemäßen Bildung der Fadenendreserve ist, daß auch ein wesentlicher Teil der Fadenendreserve auf der Mantelfläche der Spule verlegt werden kann. Dadurch braucht die Fadenendreserve auf der Hülse nur sehr wenig Platz. Außerdem ist die Gefahr des Abrutschens der Fadenendreserve von der Hülse um so kleiner, je weniger Faden auf der Hülse abgelegt ist. Bei Ablage von wenigen Windungen ist ein leichtes und schnelles Erfassen der Fadenendreserve möglich und es besteht die Sicherheit gegen Abrutschen der Fadenendreserve von der Hülse.It is particularly advantageous if the thread is under tension when it is laid down, because this causes the thread to come into contact with the bobbin surface over its entire length. If the thread is under tension, the thread end reserve is also placed on the sleeve with tension. A well tensioned thread end reserve is less likely to slip on the core. Another advantage of the formation of the thread end reserve according to the invention is that a substantial part of the thread end reserve can also be laid on the outer surface of the bobbin. As a result, the thread end reserve on the sleeve takes up very little space. In addition, the less thread that is deposited on the sleeve, the smaller the risk of the thread end reserve slipping off the sleeve. If a few turns are deposited, the thread end reserve can be grasped easily and quickly and there is security against the thread end reserve slipping off the sleeve.

Eine weitere vorteilhafte Maßnahme ist es, den Faden zur Bildung der Fadenendreserve vor dem Herunterführen von der Mantelfläche der Spule parallel zur Kante der Spule zu verlegen. Dadurch wird verhindert, daß der Faden auf der Spule seine Spannung verliert, wodurch die Fadenendreserve sich lockern und dadurch von der Hülse lösen könnte. Besonders günstig ist es die parallele Verlegung mit Abstand zur Spulenkante auszuführen, damit diese nicht von der Spule abrutschen kann.A further advantageous measure is to lay the thread parallel to the edge of the bobbin to form the end thread reserve before it is led down from the outer surface of the bobbin. This prevents the thread on the bobbin from losing its tension, which could loosen the thread end reserve and thereby release it from the sleeve. It is particularly favorable to carry out the parallel laying at a distance from the edge of the spool so that it cannot slip off the spool.

In weiterer vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, die Spule zur Bildung der Fadenendreserve stillzusetzen. Besonders zeitsparend ist die Fadenendreserve zu bilden ohne die Spule oder Spulstelle stillzusetzen. Dazu kann die Führung des Fadens vorteilhaft durch den Fadenführer für die normale Aufwindung erfolgen. Besonders günstig ist dazu die Vorrichtung der DE 3734478 A1 geeignet. Die Trennung des Fadens erfolgt dann nach der Bildung der Fadenendreserve.In a further advantageous embodiment of the invention, it is provided that the bobbin is shut down to form the thread end reserve. The thread end reserve is particularly time-saving without having to stop the bobbin or bobbin. For this purpose, the thread can advantageously be guided by the thread guide for normal winding. The device of DE 3734478 A1 is particularly suitable for this purpose. The thread is then separated after the final thread reserve has been formed.

Durch die Verwendung einer Hülse mit einer Rille ist es möglich, eine Fadenendreserve so zu bilden, daß sie vor dem Ablösen von der Hülse weitgehend sicher ist. Dies ist besonders vorteilhaft bei konischen Hülsen. Die Fadenendreserve wird meist auf dem Teil der Hülse mit dem kleineren Durchmesser gebildet, wo ein Rutschen der Fadenendreserve zu deren Ablösen führt. Durch das Vorhandensein einer Rille kann dies verhindert werden. Diese Form einer Durchmesserveränderung ist am günstigsten, da sie das Abrollen der Hülse auf der Friktionswalze nicht behindert. Besonders vorteilhaft ist eine um den gesamten Umfang der Hülse reichende Rille, weil dadurch die Differenz der Umfangslänge von Rillengrund und Hülse möglichst groß ist. Ein in der Rille liegendes Fadenstück kann aus der Rille nur dann herausrutschen, wenn es an Länge zunimmt. Da eine Längenänderung des Fadens jedoch praktisch nicht möglich ist, wird der Faden in der Rille fixiert. Die Fadenendreserve kann dadurch auf der Hülse festgehalten werden, da die übrigen Windungen der Fadenendreserve unter Spannung gehalten werden. Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen beschrieben.By using a sleeve with a groove, it is possible to form a thread end reserve so that it is largely safe from detaching from the sleeve. This is particularly advantageous with conical sleeves. The thread end reserve is usually formed on the part of the sleeve with the smaller diameter, where slipping of the thread end reserve leads to its detachment. This can be prevented by the presence of a groove. This form of diameter change is the cheapest because it does not hinder the rolling of the sleeve on the friction roller. A groove extending around the entire circumference of the sleeve is particularly advantageous because the difference in the circumferential length of the groove base and sleeve is as large as possible. A piece of thread lying in the groove can only slip out of the groove if it increases in length. However, since it is practically impossible to change the length of the thread, the thread is fixed in the groove. The end thread reserve can thereby be held on the sleeve, since the other turns of the end thread reserve are kept under tension. Further advantageous embodiments of the invention are described in the subclaims.

Im folgenden wird die Erfindung anhand von zeichnerischen Darstellungen beschrieben. Es zeigen:

Figur 1
eine fertig bewickelte konische Spule mit einer erfindungsgemäßen Fadenendreserve;
Figur 2
eine Seitenansicht der Spule von Figur 1 mit der Fadenendreserve;
Figur 3
eine Seitenansicht einer Spule mit einer Fadenendreserve, die nicht auf der Hülse abgelegt ist, gemäß dem Stand der Technik;
Figur 4
eine Spulstelle in der Seitenansicht;
Figur 5
die Spulstelle von Figur 4 in der Vorderansicht;
Figur 6
eine konische Hülse.
The invention is described below with the aid of graphic representations. Show it:
Figure 1
a finished wound conical bobbin with a thread end reserve according to the invention;
Figure 2
a side view of the bobbin of Figure 1 with the thread end reserve;
Figure 3
a side view of a bobbin with a thread end reserve, which is not deposited on the sleeve, according to the prior art;
Figure 4
a winding unit in the side view;
Figure 5
the winding unit of Figure 4 in front view;
Figure 6
a conical sleeve.

Die konische Spule von Figur 1 besitzt am größeren Ende ihrer Hülse 2 eine in bekannter Weise gebildete Fadenreserve 31 sowie am anderen Ende der Hülse 2, die mit einer Rille 20 ausgestattet ist, eine erfindungsgemäße Fadenendreserve 4. Der Einfachheit halber ist die Spule nicht in ihrer ganzen Breite dargestellt. Nach dem Ansetzen des Fadens 3 an der Hülse 2, dem Bilden der Fadenreserve 31 und dem Aufwinden einer vorgegebenen Garnmenge wird in bekannter Weise die Spinnstelle stillgesetzt und die Anlieferung des Fadens 3 unterbrochen. Nach dem Stillsetzen der Spulstelle wird einem Bedienautomaten der Auftrag erteilt, die stillgesetzte Spulstelle zu versorgen. Dies geschieht z.B. durch einen Spulenwechselwagen. Zum Bilden der Fadenendreserve wird dann vom Wartungsautomaten zunächst das Fadenende der stillgesetzten Spule gesucht, die Fadenendreserve gebildet und die Spule aus ihrer Spulstelle entnommen. Die Spule in Figur 1 ist fertig mit einer Fadenendreserve 4 bewickelt und bereits aus der Spulstelle entnommen.The conical bobbin of FIG. 1 has a thread reserve 31 formed in a known manner at the larger end of its sleeve 2 and a thread end reserve 4 according to the invention at the other end of the sleeve 2, which is equipped with a groove 20. For the sake of simplicity, the bobbin is not in it whole width. After the thread 3 has been attached to the sleeve 2, the thread reserve 31 has been formed and a predetermined amount of thread has been wound up, the spinning station is stopped in a known manner and the delivery of the thread 3 is interrupted. After the winding unit has stopped, the operator is given the job of supplying the stopped winding unit. This happens e.g. through a bobbin changer. In order to form the thread end reserve, the maintenance machine then first searches for the thread end of the idle bobbin, the thread end reserve is formed and the bobbin is removed from its winding station. The bobbin in FIG. 1 is finished with a thread end reserve 4 and has already been removed from the bobbin.

Nach dem Suchen und Auffinden des Fadens wird zunächst Faden von der Spule abgewickelt und in einer Saugvorrichtung aufgenommen. Anschließendwird die Spule in Aufwinderichtung gedreht, ohne den Faden zu verlegen, wodurch parallele Windungen 41 auf der Spule gebildet werden. Durch diese definierte Ablage des Faden wird vermieden, daß beim Herunterführen des Fadens zum Bilden der Fadenendreserve eine Schlaufe, die ohne Spannung auf der Spule abgelegt ist, ensteht. Nach dem Ausbilden der parallelen Windungen 41 wird von einem Fadenführer der Faden seitlich über die Kante der Spule geführt, wodurch sich die Fadenreserve 4 beim Weiterdrehen der Spule um die Hülse wickelt, bevor sie durch den Fadenführer zurück in Richtung Spule geführt und von dieser auf ihrer Mantelfläche 10 aufgewunden wird. Dargestellt sind der Beginn 42 der parallelen Windungen 41, wo der Faden aus der normalen Verlegung in die parallele Windungen 41 übergeht. Von den parallelen Windungen aus wird ein Fadenstück 43 zur Spulenkante 12 geführt. Nach dem Zurückführen zur Spulenkante 12 der Spule 1 wird das Fadenende 31 auf der Mantelfläche 10 der Spule 1 in Richtung Spulenmitte geführt und auf dieser abgelegt. Der Endabschnitt 310 des Fadens legt sich dabei an die Mantelfläche 10 der Spule an. Durch seine Haarigkeit legt sich das Fadenende fest auf der Mantelfläche der Spule ab. Da die gesamte Oberfläche der Spule ebenfalls haarig ist, besteht keine Gefahr, daß sich das Fadenende oder der Endabschnitt 310 von der Mantelfläche 10 der Spule ablöst. Die Fadenendreserve 4 ist dadurch gegen das Abrutschen von der Hülse 2 gesichert. Während der Bildung der Fadenendreserve und der parallelen Windungen 41 wird der Faden unter Spannung gehalten, bis er wieder auf die Mantelfläche der Spule zurückgeführt ist. Wenn die Fadenendreserve zumindest leicht unter Spannung steht, kann sicherer verhindert werden, daß sie sich von der Hülse ablöst.After searching for and finding the thread, thread is first unwound from the bobbin and taken up in a suction device. The bobbin is then rotated in the winding direction without laying the thread, whereby parallel turns 41 are formed on the bobbin. This defined depositing of the thread prevents a loop which is deposited on the spool without tension from being formed when the thread is brought down to form the thread end reserve. After the formation of the parallel windings 41, the thread is guided laterally over the edge of the bobbin by a thread guide, whereby the thread reserve 4 is wound around the sleeve when the bobbin is rotated further before being guided back in the direction of the bobbin by the thread guide and from there on the bobbin Shell surface 10 is wound. The beginning 42 of the parallel windings 41 is shown, where the thread from the normal laying into the parallel turns 41. A piece of thread 43 is guided from the parallel turns to the bobbin edge 12. After returning to the bobbin edge 12 of the bobbin 1, the thread end 31 is guided on the lateral surface 10 of the bobbin 1 in the direction of the bobbin center and is deposited thereon. The end section 310 of the thread lies against the outer surface 10 of the bobbin. Due to its hairiness, the thread end lies firmly on the outer surface of the bobbin. Since the entire surface of the bobbin is also hairy, there is no danger that the thread end or the end section 310 will become detached from the outer surface 10 of the bobbin. The thread end reserve 4 is thereby secured against slipping off the sleeve 2. During the formation of the thread end reserve and the parallel turns 41, the thread is kept under tension until it is returned to the outer surface of the bobbin. If the thread end reserve is at least slightly under tension, it can be prevented more reliably from detaching from the sleeve.

Die auf der Hülse abgelegte Fadenendreserve 4 ist definiert auf der Hülse abgelegt. Dies ist mit Hilfe der Rille 20 besonders einfach möglich. Durch diese definierte Positionierung der Fadenendreserve auf der Hülse ist bei der Weiterverarbeitung der Spule gewährleistet, daß die Fadenendreserve sowohl von Hand als auch maschinell sicher gefunden und ergriffen werden kann.The thread end reserve 4 deposited on the sleeve is deposited on the sleeve in a defined manner. This is particularly easy with the help of the groove 20. This defined positioning of the thread end reserve on the sleeve ensures during further processing of the bobbin that the thread end reserve can be found and gripped both by hand and by machine.

Neben der Fadenendreserve 4, die mit Abstand zum stirnseitigen Spulenende 120 verläuft, besitzen auch die Teile der Fadenendreserve, die von der Spulenkante 12 bis auf die Hülse 2 und wieder zurück führen, einen Abstand zum stirnseitigen Ende 120 der Spule. Dadurch ist ein Ergreifen, insbesondere ein Absaugen der Fadenendreserve zum Weiterverarbeiten der Spule besonders einfach. Durch das Verlegen des Fadenendes 30 auf der Mantelfläche 10 der Spule 1 kann die Fadenendreseve auch von der Mantelfläche der Spule aus abgezogen werden.In addition to the thread end reserve 4, which runs at a distance from the front end 120 of the bobbin, the parts of the thread end reserve which lead from the bobbin edge 12 to the sleeve 2 and back again have a distance from the end end 120 of the bobbin. This makes it particularly easy to grip, in particular to suck off the thread reserve for further processing of the bobbin. By laying the thread end 30 on the outer surface 10 of the bobbin 1, the thread end cover can also be removed from the outer surface of the bobbin.

Eine weitere Maßnahme, um die Fadenendreserve sicher zu fixieren, ist die, das Fadenstück 43 sowie das Fadenende 30 mit möglichst steilem Winkel zur Spulenkante hin und von dieser zurück auf und von der Mantelfläche zu führen. Dazu ist es erforderlich, die parallelen Windungen 41 mit größerem Abstand zur Spulenkante 12 zu verlegen.Another measure to securely fix the thread end reserve is that, the thread piece 43 and the thread end 30 as much as possible steep angle to the spool edge and from this back to and from the outer surface. For this purpose, it is necessary to lay the parallel windings 41 at a greater distance from the coil edge 12.

Figur 2 zeigt eine Seitenansicht einer Spule ähnlich der von Figur 1. Im Gegensatz zu dieser, bei der die Umschlingung des Fadens um die Hülse weniger als 360°C beträgt, ist die Umschlingung der Hülse in Figur 2 ca. 2,5 mal dem Umfang der Hülse. Ein Überkreuzen zwischen absteigendem und aufsteigendem Teil der Fadenendreserve, wie in Figur 1, ist nicht erforderlich. Das auf der Mantelfläche der Spule abgelegte Fadendende 30 umschlingt die Spule nur auf ca. 1/4 ihrer Umfangslänge. Durch ein kurzes Fadenende ist ein einfaches Ablösen der Fadenendreserve von der Spule gewährleistet. Für einen sicheren Halt des Fadenendes und damit der Fadenendreserve ist dadurch gesorgt, daß nach dem Ablegen des Fadenendes auf der Spule das Fadenende von einer Andrückrolle überrollt und auf die Mantelfläche gedrückt wird. Dadurch verzahnt sich das Fadenende mit der Oberfläche der Spule, so daß ein Herabrutschen verhindert wird. Als Andrückrolle wird vorteilhafterweise die Antriebsrolle 51, die die Spule während der Fadensuche dreht, verwendet.Figure 2 shows a side view of a bobbin similar to that of Figure 1. In contrast to this, in which the wrap of the thread around the sleeve is less than 360 ° C, the wrap of the sleeve in Figure 2 is about 2.5 times the circumference the sleeve. A crossover between the descending and ascending part of the thread end reserve, as in FIG. 1, is not necessary. The thread end 30 deposited on the outer surface of the bobbin loops around the bobbin only to about 1/4 of its circumferential length. A short thread end ensures that the thread end reserve is easily detached from the bobbin. A secure hold of the thread end and thus the thread end reserve is ensured in that after the thread end has been placed on the bobbin, the thread end is rolled over by a pressure roller and pressed onto the outer surface. As a result, the thread end interlocks with the surface of the bobbin, so that it does not slide off. The drive roller 51, which rotates the bobbin during the thread search, is advantageously used as the pressure roller.

Figur 3 zeigt eine Seitenansicht einer Spule gemäß dem Stand der Technik, bei der die Fadenendreserve 4 nach dem Herunterführen von der Mantelfläche 10 der Spule, ohne die Hülse 2 zu berühren, auf die Mantelfläche zurückgeführt ist.FIG. 3 shows a side view of a bobbin according to the prior art, in which the thread end reserve 4, after being guided down from the outer surface 10 of the bobbin, is returned to the outer surface without touching the sleeve 2.

Figur 4 zeigt eine Spulstelle 11. Von einem Spulenarm 110 wird eine Spule 1 gehalten. Diese ist zum Stillsetzen von ihrer Friktionswalze 111 abgehoben. Ein weiterer Faden wird von der Fadenlieferstelle 112 nicht nachgeliefert. Vor der Spulstelle 11 ist ein Wartungswagen 6 in Position gefahren. Dieser besitzt Mittel zum Suchen des Fadens an der stillgesetzten Spule 1, Mittel zum Antreiben der Spule und Mittel zum Verlegen des Fadens auf der Spule. Nach dem Stillsetzen der Spule, nachdem eine vorgegebene Fadenlänge oder eine vorgegebene Fadenmenge aufgewunden worden ist, hat sich der Wartungswagen 6 selbstständig in Position vor der Spulstelle gebracht. Die Spule ist von ihrem normalen Antriebsmittel, der Friktionswalze 111, die auch zum Verlegen des Fadens auf der Spule dienen kann, abgehoben. Zum Bilden der Fadenendreserve, die vom Wartungswagen 6 vorgenommen wird, muß zunächst das Fadenende, das auf die Mantelfläche der Spule aufgewunden wurde, gesucht und ergriffen werden. Dies erfolgt dadurch, daß der Spule ein Antriebsmittel zugestellt wird, die Antriebsrolle 51, mit der der Wartungswagen in der Lage ist, die Spule in beide Drehrichtungen zu drehen. Anschließend oder gleichzeitig wird der Mantelfläche der Spule vom Wartungswagen aus ein Mittel zum Suchen des Fadenendes zugestellt. Es ist dies die pneumatische Saugdüse 65, die dicht an die Mantelfläche der Spule herangeführt wird und so deren Oberfläche besaugt. Die Saugdüse 65 ist dabei so ausgebildet, daß sie die ganze Spulenbreite besaugt. Während des Besaugens der Mantelfläche der Spule wird diese in Abwickelrichtung durch die Antriebsrolle 51 des Wartungswagen 6 gedreht. Dadurch gerät das Fadenende in den Bereich der pneumatischen Saugdüse 65 und wird in diese eingesaugt. Über eine Überwachungseinrichtung (nicht gezeigt), die innerhalb eines Luftkanals der pneumatischen Saugdüse angeordnet ist, wird festgestellt, wann eine ausreichende Fadenmenge von der Spule abgewickelt worden ist. Daraufhin schwenkt die Saugdüse von der Mantelfläche der Spule zurück, wodurch sich eine von der Absaugung des Fadens bis zur Mantelfläche der Spule reichende Fadenbahn 7 bildet. Nachdem eine vorbestimmte Garnmenge von der Spule abgewickelt wurde, wird die Antriebsrolle 51 stillgesetzt. Daraufhin schwenkt in die Fadenbahn 7 ein Fadenführer zum Verlegen des Fadens ein. Dieser ist als Gewindespindel ausgebildet. Die Fadenbahn 7 ist dabei so gewählt, daß nach dem Herabführen des Fadens 3 zum Bilden der Fadenendreserve auf die Hülse 2 der Faden weiterhin im Bereich des Fadenführers verbleibt. Dadurch ist gewährleistet, daß der Faden vom Fadenführer wieder zurück auf die Mantelfläche der Spule geführt werden kann. Besonders günstig ist es, den Fadenführer bis dicht an die Oberfläche der Spule zu bringen, weil dadurch der Faden leichter wieder auf die Mantelfläche zurückgeführt werden kann. Nachdem der Fadenführer in die Fadenbahn 7 des Fadens 3 geführt wurde, wird die Antriebsrolle 51 mit umgekehrter Drehrichtung in Bewegung gesetzt, so daß der Faden zunächst wieder auf der Mantelfläche der Spule aufgewickelt wird. Dabei erfolgt keine Verlegung des Fadens, so daß sich je nach Einschaltdauer der Antriebsrolle, die mit der Länge des abgesaugten Fadens abgestimmt sein muß, eine oder mehrere parallele Windungen 41 (Figur 1) auf der Spule aufgewickelt werden. Die Stelle, wo die Parallelen Windungen auf der Spule aufgewickelt werden, hängt davon ab, wie der Faden von der pneumatischen Saugdüse gehalten wird. Wenn bereits der Fadenführer in die Fadenbahn 7 geschwenkt ist, kann durch diesen die Position der parallelen Windungen bestimmt werden.FIG. 4 shows a winding unit 11. A coil 1 is held by a coil arm 110. This is raised from its friction roller 111 to stop. Another thread is not replenished by the thread delivery point 112. A maintenance carriage 6 has moved into position in front of the winding unit 11. This has means for searching the thread on the stopped spool 1, means for driving the spool and means for laying the thread on the spool. After the bobbin has stopped, after a predetermined length or amount of thread has been wound is, the maintenance carriage 6 has brought itself into position in front of the winding unit. The bobbin is lifted from its normal drive means, the friction roller 111, which can also be used to lay the thread on the bobbin. To form the thread end reserve, which is carried out by the maintenance carriage 6, the thread end that has been wound on the outer surface of the bobbin must first be searched for and seized. This is done by supplying the spool with a drive means, the drive roller 51, with which the service vehicle is able to turn the spool in both directions of rotation. Subsequently or at the same time, a means for searching the thread end is delivered to the outer surface of the bobbin from the maintenance trolley. This is the pneumatic suction nozzle 65, which is brought close to the outer surface of the coil and thus sucks the surface thereof. The suction nozzle 65 is designed so that it sucks the entire coil width. During the suctioning of the outer surface of the coil, this is rotated in the unwinding direction by the drive roller 51 of the maintenance carriage 6. As a result, the thread end comes into the area of the pneumatic suction nozzle 65 and is sucked into it. A monitoring device (not shown), which is arranged within an air duct of the pneumatic suction nozzle, determines when a sufficient amount of thread has been unwound from the bobbin. The suction nozzle then swivels back from the outer surface of the bobbin, thereby forming a thread web 7 extending from the suction of the thread to the outer surface of the bobbin. After a predetermined amount of yarn has been unwound from the bobbin, the drive roller 51 is stopped. Then a thread guide swings into the thread path 7 for laying the thread. This is designed as a threaded spindle. The thread path 7 is selected such that after the thread 3 has been brought down to form the thread end reserve on the sleeve 2, the thread remains in the region of the thread guide. This ensures that the thread can be guided back onto the outer surface of the bobbin by the thread guide. It is particularly favorable to bring the thread guide close to the surface of the bobbin, because this makes it easier for the thread to be returned to the outer surface. After the thread guide is guided into the thread path 7 of the thread 3 was, the drive roller 51 is set in motion in the opposite direction of rotation, so that the thread is first wound up again on the outer surface of the bobbin. There is no laying of the thread, so that one or more parallel turns 41 (FIG. 1) are wound on the spool, depending on the duty cycle of the drive roller, which must be coordinated with the length of the thread being sucked off. The location where the parallel windings are wound on the spool depends on how the thread is held by the pneumatic suction nozzle. If the thread guide has already been pivoted into the thread path 7, the position of the parallel windings can be determined by this.

Nach dem Beenden der Herstellung der parallelen Windungen wird die Spindel in Bewegung gesetzt, so daß der Faden über die Kante der Spule hinausgeführt wird und auf die Hülse herabfällt. Dabei wird der entstehende Fadenüberschuß von der Absaugung der pneumatischen Saugdüse 65 aufgenommen. Gleichzeitig oder nach dem Herabrutschen des Fadens auf die Hülse wird zum Bilden der Fadenendreserve durch die Antriebsrolle 51 die Spule in Aufwickelrichtung gedreht. Abhängig von der Dauer wird mehr oder weniger Fadenendreserve gebildet. Zum Zurückführen des Fadens auf die Mantelfläche der Spule wird die Spindel in umgekehrter Richtung in Bewegung gesetzt, so daß mit der anderen Seite der Spindelflanke der Faden über die Spulenkante auf die Mantelfläche der Spule geführt wird. Während des gesamten Vorgangs wird der Faden durch die Saugdüse gespannt gehalten. Durch die sich drehende Spule wird der vorher in der Saugdüse angesaugte Faden auf der Spule abgelegt. Soll erreicht werden, daß möglichst wenig Faden auf der Mantelfläche der Spule abgelegt wird, kann der Faden geschnitten werden. Durch Weiterdrehen der Spule durch das Antriebsmittel 51 wird das Fadenende von diesem überwickelt und dadurch sicher auf der Spule festgelegt. Dies kann auch dadurch erfolgen, daß die Spule auf ihre Friktionswalze 111, die die Spule antreibt, abgesenkt wird. Nach dem Bilden der Fadenendreserve kann die Spule von einem Spulenwechselwagen oder vom Wartungswagen aus der Spulstelle in bekannter Weise entnommen und durch eine leere Hülse ersetzt werden.After the completion of the production of the parallel turns, the spindle is set in motion, so that the thread is passed over the edge of the bobbin and falls onto the sleeve. The resulting excess thread is absorbed by the suction of the pneumatic suction nozzle 65. Simultaneously or after the thread slides down onto the sleeve, the spool is rotated in the winding direction by the drive roller 51 to form the thread end reserve. Depending on the duration, more or less end thread reserve is formed. To return the thread to the outer surface of the bobbin, the spindle is set in motion in the opposite direction, so that the other side of the spindle flank guides the thread over the bobbin edge onto the outer surface of the bobbin. The thread is held taut by the suction nozzle during the entire process. Due to the rotating bobbin, the thread previously drawn into the suction nozzle is deposited on the bobbin. If it is to be achieved that as little thread as possible is deposited on the outer surface of the bobbin, the thread can be cut. By turning the bobbin further by the drive means 51, the thread end is wound over by it and thereby securely fixed on the bobbin. This can also be done by lowering the spool onto its friction roller 111, which drives the spool. After the thread end reserve has been formed, the bobbin can be removed from the bobbin from a bobbin changing carriage or from the maintenance carriage in a known manner and replaced by an empty tube.

In Figur 5 ist die Zuordnung der Saugdüse und der Spindel zur Spule in der Draufsicht gezeigt. Durch die asymmetrische Ausbildung der pneumatischen Saugdüse wird erreicht, daß der Faden nach dem Ergeifen in den Bereich der Spindel 66 gebracht wird, so daß diese durch Schwenken in die Fadenbahn 7 den Faden in ihrer Führungsrillen aufnehmen kann. Der Faden tritt durch einen Schlitz in der Saugdüse aus. Entweder durch entsprechendes Anordnen der Antriebsrolle 51 oder durch eine genügende Verlegung des Fadenendes durch die Spindel 66 wird gewährleistet, daß das Fadenende zum Andrücken durch die Antriebsrolle 51 überrollt wird.In Figure 5, the assignment of the suction nozzle and the spindle to the coil is shown in plan view. As a result of the asymmetrical design of the pneumatic suction nozzle, the thread is brought into the region of the spindle 66 after it has been gripped so that it can take up the thread in its guide grooves by pivoting into the thread path 7. The thread exits through a slot in the suction nozzle. Either by appropriately arranging the drive roller 51 or by a sufficient laying of the thread end through the spindle 66, it is ensured that the thread end is rolled over by the drive roller 51 for pressing.

Figur 6 zeigt eine konische Bördelhülse. An ihrem Ende mit großem Durchmesser besitzt sie eine Markierung 25 zum Aufnehmen der Fadenreserve. An ihrem Ende mit dem kleineren Durchmesser ist die Hülse mit einer Durchmesseränderung, die als Rille ausgebildet ist, ausgestattet. Dieses Ende besitzt eine Bördelung, zum besseren Ablaufen des Fadens bei der Weiterverarbeitung der Spule. Zum besseren Ablaufen des Fadens ist der Bereich der Bördelung 26 so ausgebildet, daß der Faden mit geringer Reibung über das Ende der Hülse laufen kann. Bei Papierhülsen geschieht dies durch Überschleifen der Oberfläche. Um ein leichteres Einlaufen der Fadenendreserve in die Rille zu gewährleisten, ist die Hülse 2 darüberhinaus im Bereich zwischen der Rille und dem Bereich, in dem die Windungen der Spule zu liegen kommen, mit einer besonders guten Oberflächenqualität bzw. mit einem geringen Reibwert ausgestattet. Dadurch ist gewährleistet, daß auf einfache Weise die Fadenendreserve sicher im Bereich der Rille zu liegen kommt. Ist die Hülse im Bereich zwischen der Rille und dem stirnseitigen Ende der Spule reibungsarm, besteht nicht die Gefahr, daß eine Fadenendreservewindung außerhalb der Rille gebildet wird. Diese könnte sich im Lauf der Zeit von der Hülse ablösen und in Richtung Hülsenende rutschen, wodurch die Fadenendreserve ihre Spannung verlieren würde, und die Gefahr bestünde, daß sie sich von der Hülse ablöst.Figure 6 shows a conical crimp sleeve. At its large diameter end it has a marking 25 for receiving the thread reserve. At its end with the smaller diameter, the sleeve is equipped with a change in diameter, which is designed as a groove. This end has a crimp, for better thread running during further processing of the bobbin. For better running of the thread, the area of the flanging 26 is designed so that the thread can run over the end of the sleeve with little friction. With paper cores, this is done by grinding the surface. In order to ensure an easier entry of the thread end reserve into the groove, the sleeve 2 is furthermore provided with a particularly good surface quality or with a low coefficient of friction in the area between the groove and the area in which the turns of the bobbin come to rest. This ensures that the thread end reserve comes to rest safely in the area of the groove. If the sleeve is low-friction in the area between the groove and the front end of the bobbin, there is no danger that a thread end reserve thread will be formed outside the groove. This could detach itself from the sleeve over time and slide towards the sleeve end, as a result of which the thread end reserve would lose its tension and there would be a risk of it detaching from the sleeve.

Claims (13)

  1. A method of producing a reserve thread end on a cross-wound bobbin, the thread being guided over the outer surface of the cross-wound bobbin and then back again onto the said outer surface after a specific diameter of the bobbin or quantity of the thread has been attained, characterized in that before the thread is guided down from the outer surface of the bobbin it is deposited on the bobbin in a defined manner and it is brought into contact with the sleeve, and the contact occurs in the region of a change in the diameter of the sleeve, so as to prevent the reserve thread from being separated.
  2. A method according to Claim 1, characterized in that before the thread is guided down from the outer surface of the bobbin it is positioned parallel to the edge of the bobbin.
  3. A method according to Claim 2, characterized in that the thread is positioned parallel to the edge of the bobbin at least for half a revolution of the bobbin.
  4. A method according to one or more of Claims 1 to 3, characterized in that the thread is guided over the outer surface onto the sleeve of the cross-wound bobbin and then back again onto the outer surface of the cross-wound bobbin.
  5. A method according to Claim 4, characterized in that the thread is positioned on the sleeve with more than one winding.
  6. A method according to Claim 4, characterized in that the thread embraces the sleeve by less than 360°.
  7. A method according to Claim 4, characterized in that the embracing amounts to approximately 180°.
  8. A method of producing a reserve thread according to one or more of Claims 1 to 7, characterized in that the reserve thread is deposited in a groove in the sleeve for receiving the reserve thread.
  9. A method according to one or more of Claims 1 to 8, characterized in that the thread returned to the outer surface of the bobbin is pressed onto the outer surface by a pressing device.
  10. A method according to one or more of Claims 1 to 9, characterized in that after the thread has been returned to the outer surface of the bobbin it is deposited thereon in a defined manner.
  11. A method according to one or more of Claims 1 to 10, characterized in that the thread is held under tension while the reserve is formed and/or while the thread end is deposited on the outer surface of the bobbin.
  12. A method according to one or more of Claims 1 to 11, characterized in that after a specific diameter of the bobbin or quantity of the thread has been attained the bobbin is stopped in order to form the reserve thread end.
  13. A method according to one or more of Claims 1 to 11, characterized in that the reserve thread end is formed without stopping the bobbin beforehand.
EP91112208A 1990-07-21 1991-07-20 Method and device for forming a spare lap with a thread end on a bobbin of a textile machine Expired - Lifetime EP0468390B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4023291A DE4023291A1 (en) 1990-07-21 1990-07-21 METHOD AND DEVICE FOR FORMING A THREAD FINAL RESERVE DEVELOPMENT ON COILS ON A TEXTILE MACHINE
DE4023291 1990-07-21

Publications (3)

Publication Number Publication Date
EP0468390A2 EP0468390A2 (en) 1992-01-29
EP0468390A3 EP0468390A3 (en) 1993-02-10
EP0468390B1 true EP0468390B1 (en) 1996-03-20

Family

ID=6410794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112208A Expired - Lifetime EP0468390B1 (en) 1990-07-21 1991-07-20 Method and device for forming a spare lap with a thread end on a bobbin of a textile machine

Country Status (3)

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EP (1) EP0468390B1 (en)
CS (1) CS225791A3 (en)
DE (2) DE4023291A1 (en)

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
CN1101006A (en) * 1992-11-26 1995-04-05 巴马格股份公司 Yarn winding method and apparatus for carrying on same
DE4415677C2 (en) * 1993-05-12 2001-09-13 Barmag Barmer Maschf Process for quality marking of a thread bobbin and winding device
WO1995015907A1 (en) * 1993-12-09 1995-06-15 Barmag Ag Process and device for marking the end of a thread wound on a spool and device for implementing it
JP3698873B2 (en) * 1997-10-03 2005-09-21 ナブテスコ株式会社 Yarn package forming method and forming apparatus
DE102007023490A1 (en) 2007-05-19 2008-11-20 Oerlikon Textile Gmbh & Co. Kg Method and device for operating a winding device of a cross-wound producing textile machine
CN103287925A (en) * 2013-07-05 2013-09-11 吴江龙纺纺织有限公司 Textile machine yarn tube

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DE1760243A1 (en) * 1968-04-23 1971-12-09 Palitex Project Co Gmbh Method for winding a cheese and device for carrying out the method

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DE1760243A1 (en) * 1968-04-23 1971-12-09 Palitex Project Co Gmbh Method for winding a cheese and device for carrying out the method

Also Published As

Publication number Publication date
DE59107567D1 (en) 1996-04-25
DE4023291A1 (en) 1992-05-14
EP0468390A3 (en) 1993-02-10
EP0468390A2 (en) 1992-01-29
CS225791A3 (en) 1992-02-19

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