EP0035098B1 - Control arrangement for a textile machine - Google Patents

Control arrangement for a textile machine Download PDF

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Publication number
EP0035098B1
EP0035098B1 EP81100231A EP81100231A EP0035098B1 EP 0035098 B1 EP0035098 B1 EP 0035098B1 EP 81100231 A EP81100231 A EP 81100231A EP 81100231 A EP81100231 A EP 81100231A EP 0035098 B1 EP0035098 B1 EP 0035098B1
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EP
European Patent Office
Prior art keywords
thread
roll
monitoring apparatus
spindle
machine
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81100231A
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German (de)
French (fr)
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EP0035098A1 (en
Inventor
Walter Ernst
Hans Giger
Ernst Sigrist
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0035098A1 publication Critical patent/EP0035098A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/18—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
    • D01H13/188—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only by cutting or clamping yarns or rovings

Definitions

  • the present invention relates to a monitoring arrangement for a textile machine equipped with at least one roller and a ring / spindle system, in which a thread winds along its path from a supply bobbin to the winding bobbin plugged onto the spindle first around the cylindrical surface of the roll with at least one turn and then guided to the ring / spindle system via a thread eyelet that is coaxial with the spindle axis.
  • a winding monitoring device in which the detection of the formation of a thread winding on a roll is carried out by means of a pushbutton designed as a lever, which is positioned close to the roll surface and directed towards the roll surface, after the pushbutton has responded a cutter placed in front of the roll in the direction of the thread stops the thread supply.
  • This device has some significant disadvantages, which its application in a textile machine equipped with a ring / spindle system, such as. B. a draw twister or a stretch texturing twine, impossible. It does indeed allow the formation of coils on the roll, regardless of whether they originate from material coming from the supply reel or from material taken off from the take-up reel; however, it presupposes that the formation of a roll of minimal thickness has already taken place, so that a cleaning operation is always necessary to remove the roll from the roll. Furthermore, this known monitoring device is not able to effectively counter the winding formation caused by unwinding the thread from the take-up spool, since it probably feels the take-up but cannot interrupt its further development. The winding is therefore getting bigger and there is a great risk of damage to the working elements of the machine.
  • DE-OS 1 535 034 it is also known to use a device for interrupting the thread feed in a textile machine of the type mentioned above, in which the thread breakage between the drawing or delivery unit and the spindle (by a between the drawing or delivery unit and Spindle on the thread sensing element recognized) an electrical heating element arranged in the vicinity of the thread run and intended for separating the thread separates the thread from its inlet to the drawing or delivery unit.
  • This device also has the disadvantage that the winding formation caused by unwinding the thread "overhead" from the take-up spool cannot be detected and prevented. The risk of wrapping therefore remains.
  • the present invention also aims to completely eliminate the risk of unwinding "overhead" of the take-up reel placed on the spindle, and this with a simple, cheap and reliable arrangement.
  • Claims 3 to 6 relate to particularly advantageous uses of the monitoring arrangement according to the invention.
  • Fig. 1 which shows the working elements of a processing station of a draw twisting machine
  • 1 is the supply spool, which is attached to a plug-in 2 of the machine, which is shown only schematically, and from which an undrawn film 5 is drawn off by means of a driven delivery roller pair 3/4.
  • the filament 5 is unwound from the spool 1 such that the nip of the filament between the delivery rollers 3 and 4 lies essentially on the axis a of the spool.
  • This type of unwinding is called "overhead” and is characterized in that the thread to be unwound forms a balloon 6 around the bobbin 1.
  • the spool can stand still, which is the real advantage of "overhead unwinding", or it can also turn around its axis a. In both cases, “overhead” deduction is possible: the only difference between these cases is the number of turns that are present in the thread after the delivery rollers 3/4.
  • the thread 9 with a deflection roller is designated, which is substantially parallel to the axis 8 of the stretching roller 7 and cooperates with the roller 7 in a known manner.
  • the thread is now wound with several turns 10a (FIG. 2) around the stretching roller 7 and around the deflecting roller 9 and forms on the surface of the roller 7 from top to bottom in FIG. 1 between the point of impact A (see also FIG. 1 ) and the sequence point B (see also Fig. 1) running helix.
  • the thread is stretched due to the difference in speed.
  • the thread 10, now stretched is fed from thread point B to a thread eyelet 11.
  • the thread is wound to form a thread balloon 12 and after passing through a rotor 14 circling on a ring 13 onto a winding spool 15 driven in rotation.
  • the take-up reel 15 is seated on a spindle 16 which is driven in rotation by suitable means (for example in FIG. 1 with a belt 17).
  • suitable means for example in FIG. 1 with a belt 17.
  • the winding mechanism of such a ring / spindle system is assumed to be known here and is therefore not described further.
  • 18 represent the spindle bench and 19 the ring bench.
  • the direction of rotation of the stretching roller 7 is indicated by the arrow f.
  • a first thread separating element 20 is provided in front of the stretching roller 7, as seen in the thread running direction.
  • This element which is shown in FIG. 1 as scissors, for example, is able to thread the thread between the supply spool 1 and the drawing roller 7 in some way (e.g. by mechanical cutting or cutting, by cutting by means of temperature increase, etc .) and is controlled by a control device 21 via line 22 in a manner explained later.
  • the above-mentioned thread separating element 20 can be placed in the immediate vicinity of the thread eyelet 11, in such a way that it is able to separate the thread between the stretching roller 7 and the spindle 16 (or the take-up spool 15) when the winding spool is m tracked.
  • the thread separating element 23 thus cuts through the unwinding path m.
  • This thread separating element 23 is also controlled in a suitable manner by means of the control device 21 via the line 24.
  • the separation elements 20 and 23 may be controlled electrically, pneumatically, hydraulically, etc., depending on the type of elements selected. Accordingly, the lines 22 and 24 can be of the most varied types, and the control device 21 also functions in accordance with the selected type of thread separating elements 20 and 23.
  • the spatial position of the slot 26 plays a crucial role in the context of this invention: namely, the slot 26 should be able to release the thread 10 in a plane which is substantially perpendicular to the roller axis 8, and the release must be from the side against which the Roll 7 lies, can be done. This therefore means that the slot 26 is open from the side where the roller 7 is located, that is to say to the left in FIGS. 1 and 2.
  • each of the two flanks 27 and 28 of the slot 26 lie essentially in a plane which is perpendicular to the roller axis 8.
  • the position of the thread sensor 25 is selected so that a thread following the dash-dotted unwinding path m can no longer be reliably sensed by the thread sensor 25. It is therefore advisable to place the thread sensor 25 at a sufficient distance in front of the thread eyelet 11.
  • thread sensor 25 or its mode of operation, can be chosen arbitrarily within the scope of this invention: the most suitable are contactless thread sensors (e.g. optical, capacitive, etc.), since they do not interfere with the normal thread run: but also mechanically scanning thread sensors (not shown) are quite usable as long as they meet the above-mentioned condition about the release of the thread 10.
  • contactless thread sensors e.g. optical, capacitive, etc.
  • the thread sensor 25 is connected to the control unit 21 via a line 29.
  • this line 29 can also be an electrical, a pneumatic, a hydraulic, a mechanical, etc.
  • the control elements 21, 22, 24 and 29 must meet a single condition, namely that if there is no thread in the thread sensor 25 (ie if the latter no longer feels thread 10 in the area of its slot 26), both thread separating elements 20 and 23 via the lines 22 and 24 be operated and cause the separation of the thread at both designated locations.
  • Such a control of the working elements 20, 23 and 25, or the circuits required in the control device 21, are familiar to any person skilled in the art and need not be described here.
  • the second thread separating element 23 and the thread eyelet 11 in the immediate vicinity of the arrangement of FIGS. 1 and 2 can advantageously be combined in a single thread separating element 30, as shown in FIG. 3.
  • This consists e.g. B. from a lower plate 31, in which a suitable bore 32 is present as a thread eyelet with threading slot 33, and from a knife 34 which is pivotally mounted about an axis 35 on the plate 31 and pivoted by means of a cylinder / piston system 36 for the cutting operation can be.
  • the knife 34 is pivoted, the thread passing through the thread eyelet is then severed between the upper edge of the bore 32 and the lower, front edge of the knife 34.
  • FIG. 4 also shows the use of the arrangement according to the invention in a stretch texturing twisting machine, the same elements as in the arrangement of FIGS. 1 and 2 being designated with the same reference numbers. Unlike the arrangement of FIGS. 1 and 2, the fact that the thread in this machine is not only subjected to a drawing process, but also to a texturing process with an increase in temperature, is different here. The path from the supply spool 1 to the spindle 16, or to the take-up spool 15, is therefore much longer and more complicated here.
  • a stretch texturing twisting machine for the so-called simultaneous process is shown schematically, has a first thread guide 37, seen in the thread running direction, a feed mechanism 38 consisting of two rollers, a heater 39, in which the thread z. B. heated by contact to a certain temperature, a false twist member 40 (z. B. in the form of a multi-letter false twist member), with which the thread between the twist-stop role 41 and the organ 40 gives a false twist, a stretching roll 7, on which the thread is wound with several turns and which allows the thread in the texturing zone to be kept under tension by stretching (which is why we are talking about crimping during stretching, ie simultaneously) and finally the thread eyelet 11 with balloon 12 and ring 13 with runner 14.
  • the arrangement of the elements after the stretching roller 7 corresponds exactly to that of FIGS. 1 and 2 and here too the task to be solved, ie the prevention of the risk of the reel 15 being unwound, is the same as there.
  • the arrangement of the second thread separating element 23 and the thread sensor 25 corresponds exactly to that of FIGS. 1 and 2: only the first thread separating element 20 is in the thread running direction, not directly in front of the stretching roller 7 as in the arrangement of FIG. 1, but in front of the above-mentioned working members 38 placed to 41.
  • the thread separating element 20 thus, when actuated, separates the thread immediately after the supply spool 1. According to the invention, however, it is irrelevant where exactly the first thread separating element is placed in the thread path: it only has to be able to separate the thread in front of the stretching roller 7.
  • the thread separating elements 20 and 23 and the thread sensor 25 are connected to the control device 21 by means of the lines 22, 24 and 29, and the thread separating elements 20 and 23 are controlled in exactly the same way as in the case of the arrangement of FIGS. 1 and 2 4 also shows the thread run with m, which the thread would follow when unwinding from the bobbin 15, if this were not prevented by the arrangement according to the invention
  • the thread separating element 23 must be placed in such a way that it must sever the thread following the unwinding path m: however, as in the case of the variant of FIG. B. cut the track of the normal running thread 10.
  • the advantages of the described monitoring arrangement according to the invention are, in addition to the already mentioned high reliability, their easy, subsequent installation in existing textile machines for the processing of endless filaments and the fact that the winding formation is prevented even before it occurs.
  • the monitoring arrangement described can advantageously be used on draw twisting machines and on draw texturing twisting machines, and in these uses described here the roll 7 can then be a so-called streokrolte.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Description

Die vorliegende Erfindung betrifft eine Überwachungsanordnung für eine mit mindestens einer Rolie und einem Ring/Spindel-System ausgerüstete Textilmaschine, bei welcher ein Faden längs seiner Laufbahn von einer Vorlagespule zur auf die Spindel aufgesteckten Aufwikkelspule zuerst um die zylindrische Oberfläche der Rolle mit mindestens einer Windung gewunden und anschließend über eine zur Spindelachse gleichachsige Fadenöse zum Ring/Spindel-System geführt wird.The present invention relates to a monitoring arrangement for a textile machine equipped with at least one roller and a ring / spindle system, in which a thread winds along its path from a supply bobbin to the winding bobbin plugged onto the spindle first around the cylindrical surface of the roll with at least one turn and then guided to the ring / spindle system via a thread eyelet that is coaxial with the spindle axis.

Beim Fördern von Endlosfilamenten, im folgenden Fäden genannt, wird in der Regel ein erheblicher Teil des Umfang-s einer Streck-oder Umlenkrolle, im foIgenuon Rolle genannt, belegt. Es kommt dabei relativ oft vor, daß der Faden bei einem Fadenbruch auf der Oberfläche der Rolle durch Haftreibung kleben bleibt. Erfolgt der Fadenbruch zwischen der Rolle und der nachfolgenden Spindel, dann wird der von der Vorlagespule weiter abgezogene Faden auf die Rollenoberfläche aufgewunden, was zu einer störenden Wickelbildung führt, die sich unangenehm auf den Arbeitsablauf auswirkt. Erfolgt hingegen der Fadenbruch vor der Rolle, d. h. zwischen der Vorlagespule und der Rolle, so kommt es oft vor, daß der »herauslaufende Fadenschwanz« sich nicht von der Rollenoberfläche ablöst und von dieser mitgenommen wird; womit der Faden auf die Rolle in umgekehrter Laufrichtung aufgewunden wird. Da nach der Rolle ein Ring/Spindel-System folgt, bei welchem der Faden über den Kopf der Spule abgezogen werden kann, ergibt sich somit auch in diesem Fall auf der Rolle eine Wickelbildung, welche theoretisch nicht aufhört, bis die ganze auf die Spindel aufgesteckte Aufwickelspule abgespult wurde.When conveying continuous filaments, hereinafter referred to as threads, a considerable part of the circumference of a stretching or deflecting roller, hereinafter referred to as the roller, is usually occupied. It happens relatively often that the thread sticks to the surface of the roll due to static friction in the event of a thread break. If the thread breaks between the roll and the subsequent spindle, then the thread drawn further from the supply spool is wound onto the surface of the roll, which leads to an annoying winding formation, which has an unpleasant effect on the workflow. On the other hand, if the thread breaks before the reel, H. between the supply spool and the roll, it often happens that the "thread tail that runs out" does not detach from the roll surface and is carried along by it; with which the thread is wound onto the roll in the reverse direction. Since the reel is followed by a ring / spindle system, in which the thread can be drawn off over the head of the bobbin, this also results in a winding formation on the reel, which theoretically does not stop until the whole is placed on the spindle Take-up spool has been unwound.

Es sind nun bereits Überwachungsanordnungen bekannt, welche bezwecken, die schädlichen Folgen solcher Wickelbildungen dadurch zu beseitigen, daß, falls ein Fadenbruch festgestellt wird, die Fadenzufuhr von der Vorlagespule abgestellt wird. So ist nach der DE-PS 1 940 272 eine Wickel-Überwachungsvorrichtung bekannt, bei welcher die Feststellung der Entstehung eines Fadenwickels auf einer Rolle mittels einem nahe an der Rollenoberfläche angestellten, zur Rollenoberfläche gerichteten, als Hebel ausgebildeten Taster erfolgt, wobei nach Ansprechen des Tasters ein in Fadenlaufrichtung vor die Rolle gelegter Abschneider die Fadenzufuhr abstellt.Monitoring arrangements are now already known which aim to eliminate the harmful consequences of such winding formations in that if a thread break is detected, the thread feed is switched off by the supply spool. Thus, according to DE-PS 1 940 272, a winding monitoring device is known, in which the detection of the formation of a thread winding on a roll is carried out by means of a pushbutton designed as a lever, which is positioned close to the roll surface and directed towards the roll surface, after the pushbutton has responded a cutter placed in front of the roll in the direction of the thread stops the thread supply.

Diese Vorrichtung weist einige bedeutende Nachteile auf, welche ihre Anwendung bei einer mit einem Ring/Spindel-System ausgerüsteten Textilmaschine, wie z. B. einer Streckzwirnmaschine oder einer Strecktexturierzwirnmaschine, unmöglich machen. Zwar gestattet sie die Bildung von Wickeln auf der Rolle, unabhängig davon, ob sie durch von der Vorlagspule kommenden oder durch von der Aufwickelspule über Kopf abgezogenem Material herrühren, zu erkennen; sie setzt aber voraus, daß die Bildung eines Wickels minimaler Dicke bereits stattgefuiiden hat, so daß immer eine Reinigungsoperation für die Entfernung des Wickels von der Rolle nötig ist. Weiter ist diese bekannte Überwachungsvorrichtung nicht in der Lage, den durch Abspulung des Fadens von der Aufwickelspule hervorgerufenen Wickelbildungen wirksam entgegenzutreten, da sie wohl den Wickel spürt, nicht aber seine Weiterbildung unterbrechen kann. Der Wickel wird also immer größer, und es besteht eine große Beschädigungsgefahr für die Arbeitselemente der Maschine.This device has some significant disadvantages, which its application in a textile machine equipped with a ring / spindle system, such as. B. a draw twister or a stretch texturing twine, impossible. It does indeed allow the formation of coils on the roll, regardless of whether they originate from material coming from the supply reel or from material taken off from the take-up reel; however, it presupposes that the formation of a roll of minimal thickness has already taken place, so that a cleaning operation is always necessary to remove the roll from the roll. Furthermore, this known monitoring device is not able to effectively counter the winding formation caused by unwinding the thread from the take-up spool, since it probably feels the take-up but cannot interrupt its further development. The winding is therefore getting bigger and there is a great risk of damage to the working elements of the machine.

Nach der DE-OS 1 535 034 ist es ebenfalls bekannt, in einer Textilmaschine der oben genannten Art eine Vorrichtung zum Unterbrechen des Fadenzulaufes anzuwenden, bei welcher beim Fadenbruch zwischen Streck- bzw. Lieferwerk und Spindel (durch ein zwischen Streck- bzw. Lieferwerk und Spindel am Faden anliegendes Tastglied erkannt) ein in der Nähe des Fadenlaufes angeordnetes, zum Trennen des Fadens vorgesehenes elektrisches Heizelement den Faden von seinem Zulauf zum Streck- oder Lieferwerk trennt. Auch diese Vorrichtung weist den Nachteil auf, daß die durch Abspulung des Fadens »über Kopf« von der Aufwickelspule hervorgerufenen Wickelbildungen nicht erfaßt und verhindert werden können. Die Wickelgefahr bleibt somit bestehen.According to DE-OS 1 535 034 it is also known to use a device for interrupting the thread feed in a textile machine of the type mentioned above, in which the thread breakage between the drawing or delivery unit and the spindle (by a between the drawing or delivery unit and Spindle on the thread sensing element recognized) an electrical heating element arranged in the vicinity of the thread run and intended for separating the thread separates the thread from its inlet to the drawing or delivery unit. This device also has the disadvantage that the winding formation caused by unwinding the thread "overhead" from the take-up spool cannot be detected and prevented. The risk of wrapping therefore remains.

Auch nach dem ebenfalls bekannten Vorschlag nach der CH-PS 582257, welcher zur Entdeckung eines Fadenbruches die Überwachung der Rotation des Läufers auf dem Ring mittels eines berührungslos arbeitenden Läuferfühlers vorsieht, ist es nicht mit ausreichender Sicherheit möglich, die oben geschilderte Gefahr des Abspulens des Fadens »über Kopf« zu beseitigen, da auch in diesem Fall der Faden im Läufer eingefädelt bleiben kann, womit der Läufer weiter auf dem Ring rotiert.Even according to the also known proposal according to CH-PS 582257, which provides for the detection of a thread break, the monitoring of the rotation of the rotor on the ring by means of a non-contacting rotor sensor, it is not possible with sufficient certainty to avoid the above-described risk of the thread unwinding Eliminate "overhead", because in this case too the thread can remain threaded in the runner, whereby the runner continues to rotate on the ring.

Es ist Aufgabe der vorliegenden Erfindung, in einer Anordnung wie die obengenannte die erwähnten Nachteile des Standes der Technik zu beseitigen und insbesondere dafür zu sorgen, daß eine Wickelbildung um die Rolle sofort verhindert wird, d. h. praktisch keine Windung sich um die Rolle aufwickeln kann, und dies nicht nur wenn der Faden zwischen der Rolle und der Spindel, bzw. der Aufwickelspule, bricht, sondern auch wenn der Fadenbruch zwischen der Vorlagespule und der Rolle sich ereignet.It is an object of the present invention to eliminate the disadvantages of the prior art mentioned in an arrangement such as the above, and in particular to ensure that the formation of wraps around the roll is immediately prevented, i. H. practically no turn can wind up around the reel, and not only if the thread breaks between the reel and the spindle or the take-up spool, but also if the thread break occurs between the supply spool and the reel.

Anders gesagt, die vorliegende Erfindung bezweckt auch die komplette Beseitigung der Gefahr des Abspulens »über Kopf« der auf die Spindel gesteckten Aufwickelspule und dies mit einer einfachen, billigen und betriebssicheren Anordnung.In other words, the present invention also aims to completely eliminate the risk of unwinding "overhead" of the take-up reel placed on the spindle, and this with a simple, cheap and reliable arrangement.

Diese Aufgabe wird mit der Anordnung nach Anspruch 1 gelöst.This object is achieved with the arrangement according to claim 1.

Besonders vorteilhaft ist die Überwachungsanordnung nach Anspruch 2, da dank der Zusammenlegung des zweiten Fadentrennelementes mit der Fadenöse eine sehr einfache Anordnung entsteht.Monitoring is particularly advantageous Arrangement according to claim 2, since thanks to the merging of the second thread separating element with the thread eyelet, a very simple arrangement is created.

Die Ansprüche 3 bis 6 betreffen besonders vorteilhafte Verwendungen der erfindungsgemäßen Überwachungsanordnung.Claims 3 to 6 relate to particularly advantageous uses of the monitoring arrangement according to the invention.

Die Erfindung wird nun anhand einiger illustrierter Ausführungsbeispiele näher erläutert. Es zeigt

  • Fig. 1 die erfindungsgemäße Überwachungsanordnung in schematischer Darstellung in einer Streckzwirnmaschine;
  • Fig. einen Schnitt längs der Linie 11-11 der Anordnung der Fig. 1;
  • Fig. 3 eine Variante eines Details der Anordnung der Fig. 1 und 2;
  • Fig. 4 die erfindungsgemäße Überwachungsanordnung ebenfalls in schematischer Darstellung in einer Strecktexturierzwirnmaschine.
The invention will now be explained in more detail with the aid of a few illustrated exemplary embodiments. It shows
  • Figure 1 shows the monitoring arrangement according to the invention in a schematic representation in a draw twisting machine.
  • Fig. A section along the line 11-11 of the arrangement of Fig. 1;
  • 3 shows a variant of a detail of the arrangement of FIGS. 1 and 2;
  • Fig. 4, the monitoring arrangement according to the invention also in a schematic representation in a stretch texturing twisting machine.

In Fig. 1, welche die Arbeitselemente einer Verarbeitungsstelle einer Streckzwirnmaschine zeigt, ist 1 die Vorlagespule, welche auf einer nur schematisch dargestellten Aufsteckung 2 der Maschine befestigt ist und aus welcher, mittels eines angetriebenen Lieferwalzenpaares 3/4, ein unverstrecktes Filmanet 5 abgezogen wird. Die Abspulung des Filaments 5 aus der Spule 1 erfolgt dabei im gezeigten Beispiel so, daß der Klemmpunkt des Filaments zwischen den Lieferwalzen 3 und 4 im wesentlichen auf der Achse a der Spule liegt. Diese Art von Abspulung nennt man »über Kopf« und ist dadurch charakterisiert, daß der abzuspulende Faden einen Ballon 6 um die Spule 1 bildet. Dabei kann die Spule still stehen, was den eigentlichen Vorteil von der »über Kopf-Abspulung« darstellt, oder auch sich um ihre Achse a drehen. In beiden Fällen ist ein Abzug »über Kopf« möglich: der einzige Unterschied zwischen diesen Fällen liegt in der Anzahl Drehungen, welche im Faden nach den Lieferwalzen 3/4 vorhanden sind. Diese Erklärungen dienen nur, um den Begriff »Abspulung über Kopf«, welcher bei dieser Erfindung eine maßgebende Rolle spielt, zu präzisieren. Im Rahmen dieser Erfindung spielt hingegen keine Rolle, ob die Vorlagespule 1 »über Kopf« oder durch Abrollen abgezogen wird. Die Lieferwalzen 3 und 4 liefern den Faden an eine Streckrolle 7, welche mit einer angetriebenen, in der Maschine gelagerten Achse 8 (s. auch Fig. 2) rotiert. Mit 9 ist eine Umlenkwalze bezeichnet, welche im wesentlichen parallel zur Achse 8 der Streckrolle 7 liegt und in bekannter Weise mit der Rolle 7 zusammenarbeitet. Der Faden wird nun mit mehreren Windungen 10a (Fig. 2) um die Streckrolle 7 und um die Umlenkwalze 9 gewunden und bildet auf der Oberfläche der Rolle 7 eine in Fig. von oben nach unten zwischen dem Auflaufpunkt A (s. auch Fig. 1) und dem Ablaufpunkt B (s. auch Fig. 1) laufende Schraubenlinie. In der Strecke zwischen dem Lieferwalzenpaar 3/4 und dem Auflaufpunkt A wird dabei der Faden infolge Geschwindigkeitsunterschied gestreckt. Vom Ablaufpunkt B wird der nun gestreckte Faden 10 einer Fadenöse 11 zugeführt. Von dort wird der Faden unter Bildung eines Fadenballons 12 und nach Passieren eines auf einem Ring 13 kreisenden Läufers 14 auf eine in Rotation angetriebene Aufwickelspule 15 aufgewunden. Die Aufwickelspule 15 sitzt auf einer Spindel 16, welche mit geeigneten Mitteln (z. B. in Fig. 1 mit einem Riemen 17) in Rotation angetrieben wird. Der Aufwindemechanismus eines solchen Ring/Spindel-Systems wird hier als bekannt vorausgesetzt und deshalb nicht weiter beschrieben. Es sei nur noch bemerkt, daß 18 die Spindelbank und 19 die Ringbank darstellen. Mit dem Pfeil f ist der Drehsinn der Streckrolle 7 angedeutet.In Fig. 1, which shows the working elements of a processing station of a draw twisting machine, 1 is the supply spool, which is attached to a plug-in 2 of the machine, which is shown only schematically, and from which an undrawn film 5 is drawn off by means of a driven delivery roller pair 3/4. In the example shown, the filament 5 is unwound from the spool 1 such that the nip of the filament between the delivery rollers 3 and 4 lies essentially on the axis a of the spool. This type of unwinding is called "overhead" and is characterized in that the thread to be unwound forms a balloon 6 around the bobbin 1. The spool can stand still, which is the real advantage of "overhead unwinding", or it can also turn around its axis a. In both cases, "overhead" deduction is possible: the only difference between these cases is the number of turns that are present in the thread after the delivery rollers 3/4. These explanations serve only to clarify the term "unwinding overhead", which plays a decisive role in this invention. In the context of this invention, on the other hand, it does not matter whether the supply spool 1 is pulled off "overhead" or by unrolling. The delivery rollers 3 and 4 deliver the thread to a drawing roller 7, which rotates with a driven axis 8 (see also FIG. 2) mounted in the machine. 9 with a deflection roller is designated, which is substantially parallel to the axis 8 of the stretching roller 7 and cooperates with the roller 7 in a known manner. The thread is now wound with several turns 10a (FIG. 2) around the stretching roller 7 and around the deflecting roller 9 and forms on the surface of the roller 7 from top to bottom in FIG. 1 between the point of impact A (see also FIG. 1 ) and the sequence point B (see also Fig. 1) running helix. In the distance between the delivery roller pair 3/4 and the run-up point A, the thread is stretched due to the difference in speed. The thread 10, now stretched, is fed from thread point B to a thread eyelet 11. From there, the thread is wound to form a thread balloon 12 and after passing through a rotor 14 circling on a ring 13 onto a winding spool 15 driven in rotation. The take-up reel 15 is seated on a spindle 16 which is driven in rotation by suitable means (for example in FIG. 1 with a belt 17). The winding mechanism of such a ring / spindle system is assumed to be known here and is therefore not described further. It should only be noted that 18 represent the spindle bench and 19 the ring bench. The direction of rotation of the stretching roller 7 is indicated by the arrow f.

Wenn nun bei einer solchen Anordnung keine Überwachungselemente vorhanden sind, kann es vorkommen, daß der Faden z. B. vor der Streckrolle 7 entweder bricht oder wegen Erschöpfung der Vorlagespule 1 fehlt. In diesem Fall müßte das auslaufende Fadenende auf der Rollenoberfläche bis zum Ablaufpunkt B sich verschieben und dann die Rolle 7 verlassen und durch die Fadenöse 11 zur Aufwickelspule 15 gelangen. Leider geschieht es aber immer wieder, daß der Ablauf des freien, d. h. nicht mehr straff geführten Fadenendes, nicht, wie oben geschildert, korrekt erfolgt, sondern daß das Fadenende aus den verschiedensten Gründen an der Oberfläche der Rolle 7 haften bleibt und von dieser mitgenommen wird. In diesem Fall gelangt dann der Faden in die in Fig. 1 strichpunktiert dargestellte Lage, welche der Abspulbahn m entspricht, womit der Faden 10 nicht mehr dem Weg von der Rolle 7 zur Aufwickelspule 15, sondern dem umgekehrten Weg von der Aufwickelspule 15 zur Rolle 7, unter Passieren der Fadenöse 11, folgt. Der Faden ändert also seine Bewegungsrichtung und wird unter Weiterbildung eines Ballons 12 von der Aufwickelspule 15 »über Kopf« abgespult. Das abgespulte Material wird dabei auf der Oberfläche der Streckrolle 7 als störender Wickel aufgewunden, und dieser Abspulprozeß geht theoretisch weiter, bis die ganze Aufwickelspule 15 vollständig leer steht. Dies ergibt in den meisten Fällen, insbesondere wenn die Aufwikkelspule 15 viel Material aufweist, große bedienungstechnische Schwierigkeiten, welchen nach der vorliegenden Erfindung durch eine bestimmte Anordnung der Überwachungselemente wirksam entgegengetreten wird.If there are no monitoring elements in such an arrangement, it may happen that the thread z. B. before the stretching roller 7 either breaks or is missing due to exhaustion of the supply spool 1. In this case, the thread end that is running out would have to shift on the roll surface to the outlet point B and then leave the roll 7 and reach the take-up spool 15 through the thread eyelet 11. Unfortunately, however, it happens again and again that the course of the free, i.e. H. no longer taut thread end, not correctly, as described above, but that the thread end sticks to the surface of the roller 7 for a variety of reasons and is entrained by it. In this case, the thread then reaches the position shown in dash-dotted lines in FIG. 1, which corresponds to the unwinding path m, with which the thread 10 no longer travels from the reel 7 to the take-up spool 15, but the opposite way from the take-up spool 15 to the roll 7 , passing the eyelet 11, follows. The thread thus changes its direction of movement and is unwound from the take-up spool 15 "overhead" with the development of a balloon 12. The unwound material is wound on the surface of the stretching roller 7 as a troublesome winding, and this unwinding process theoretically continues until the entire winding reel 15 is completely empty. In most cases, particularly when the winding reel 15 has a large amount of material, this results in major operating difficulties which, according to the present invention, are effectively countered by a specific arrangement of the monitoring elements.

Zu diesem Zwecke ist, in Fadenlaufrichtung gesehen, ein erstes Fadentrennelement 20 vor der Streckrolle 7 vorgesehen. Dieses Element, welches in Fig. 1 beispielsweise als Schere dargestellt wird, ist in der Lage, den Faden zwischen der Vorlagespule 1 und der Streckrolle 7 in irgendeiner Weise (z. B. durch mechanisches Trennen bzw. Schneiden, durch Abtrennen mittels Temperaturerhöhung, usw.) abzutrennen und wird ausgehend von einem Steuergerät 21 über die Leitung 22 in später erklärter Art gesteuert. Ein weiteres Fadentrennelement 23, welches im Aufbau z. B. genau gleich wie das obgenannte Fadentrennelement 20 sein kann, ist in unmittelbarer Nähe der Fadenöse 11 plaziert, und zwar so, daß es in der Lage ist, den Faden zwischen der Streckrolle 7 und der Spindel 16 (bzw. der Aufwickelspule 15) abzutrennen, wenn er die Abepulbahn m verfolgt. Das Fadentrennelement 23 durch schneidet also die Abspulbahn m. Auch dieses Fadentrennelement 23 wird mittels des Steuergeräts 21 über die Leitung 24 in passender Weise gesteuert. Dabei darf die Steuerung der Trennelemente 20 und 23 je nach Art der gewählten Elemente elektrisch, pneumatisch, hydraulisch, usw. erfolgen. Die Leitungen 22 und 24 können also dementsprechend verschiedenster Art sein, und auch das Steuergerät 21 richtet sich in seiner Funktionsweise nach der gewählten Art der Fadentrennelemente 20 und 23.For this purpose, a first thread separating element 20 is provided in front of the stretching roller 7, as seen in the thread running direction. This element, which is shown in FIG. 1 as scissors, for example, is able to thread the thread between the supply spool 1 and the drawing roller 7 in some way (e.g. by mechanical cutting or cutting, by cutting by means of temperature increase, etc .) and is controlled by a control device 21 via line 22 in a manner explained later. Another thread separating element 23, which in construction z. B. exactly the same as that The above-mentioned thread separating element 20 can be placed in the immediate vicinity of the thread eyelet 11, in such a way that it is able to separate the thread between the stretching roller 7 and the spindle 16 (or the take-up spool 15) when the winding spool is m tracked. The thread separating element 23 thus cuts through the unwinding path m. This thread separating element 23 is also controlled in a suitable manner by means of the control device 21 via the line 24. The separation elements 20 and 23 may be controlled electrically, pneumatically, hydraulically, etc., depending on the type of elements selected. Accordingly, the lines 22 and 24 can be of the most varied types, and the control device 21 also functions in accordance with the selected type of thread separating elements 20 and 23.

Weiter ist in der Laufbahn des normal laufenden, gestreckten Fadens 10, zwischen der Streckrolle 7 und dem zweiten Fadentrennelement 23, ein Fadenfühler 25 vorgesehen, welcher einen offenen Schlitz 26 (Fig.2) aufweist. Die räumliche Lage des Schlitzes 26 spielt dabei im Rahmen dieser Erfindung eine entscheidende Rolle: der Schlitz 26 soll nämlich den Faden 10 in einer Ebene freigeben können, welche im wesentlichen senkrecht zur Rollenachse 8 steht, und die Freigabe muß von der Seite, gegen welche die Rolle 7 liegt, erfolgen können. Dies bedingt also, daß der Schlitz 26 von der Seite offen ist, wo die Rolle 7 sich befindet, also in der Fig. 1 und 2 gegen links. Die obengenannten Bedingungen bezüglich der Freigabe des Fadens 10 bedeuten, daß jede der zwei Flanken 27 und 28 des Schlitzes 26 im wesentlichen in einer Ebene liegen, welche senkrecht zur Rollenachse 8 steht. Die Lage des Fadenfühlers 25 wird dabei so gewählt, daß ein der strichpunktierten Abspulbahn m folgender Faden mit Sicherheit nicht mehr durch den Fadenfühler 25 gefühlt werden kann. Es empfiehlt sich also, den Fadenfühler 25 in ausreichender Distanz vor der Fadenöse 11 zu plazieren.Furthermore, a thread sensor 25, which has an open slot 26 (FIG. 2), is provided in the track of the normally running, stretched thread 10, between the stretching roller 7 and the second thread separating element 23. The spatial position of the slot 26 plays a crucial role in the context of this invention: namely, the slot 26 should be able to release the thread 10 in a plane which is substantially perpendicular to the roller axis 8, and the release must be from the side against which the Roll 7 lies, can be done. This therefore means that the slot 26 is open from the side where the roller 7 is located, that is to say to the left in FIGS. 1 and 2. The above-mentioned conditions with regard to the release of the thread 10 mean that each of the two flanks 27 and 28 of the slot 26 lie essentially in a plane which is perpendicular to the roller axis 8. The position of the thread sensor 25 is selected so that a thread following the dash-dotted unwinding path m can no longer be reliably sensed by the thread sensor 25. It is therefore advisable to place the thread sensor 25 at a sufficient distance in front of the thread eyelet 11.

Die Art des Fadenfühlers 25, bzw. seiner Arbeitsweise, kann im Rahmen dieser Erfindung beliebig gewählt werden: am geeignetsten sind berührungslos arbeitende Fadenfühler (z. B. optisch, kapazitiv, usw.), da sie den normalen Fadenlauf nicht stören: aber auch mechanisch abtastende Fadenfühler (nicht gezeigt) sind durchaus brauchbar, sofern sie die obengenannte Bedingung über die Freigabe des Fadens 10 erfüllen.The type of thread sensor 25, or its mode of operation, can be chosen arbitrarily within the scope of this invention: the most suitable are contactless thread sensors (e.g. optical, capacitive, etc.), since they do not interfere with the normal thread run: but also mechanically scanning thread sensors (not shown) are quite usable as long as they meet the above-mentioned condition about the release of the thread 10.

Der Fadenfühler 25 ist über eine Leitung 29 mit dem Steuergerät 21 verbunden. Auch diese Leitung 29 kann je nach gewählter Art des Fadenfühlers 25 eine elektrische, eine pneumatische, eine hydraulische, eine mechanische, usw. sein. Die Steuerelemente 21, 22, 24 und 29 müssen erfindungsgemäß eine einzige Bedingung erfüllen, nämlich daß bei fehlendem Faden im Fadenfühler 25 (d. h. wenn dieser keinen Faden 10 mehr im Bereich seines Schlitzes 26 fühlt) beide Fadentrennelemente 20 und 23 über die Leitungen 22 und 24 betätigt werden und die Trennung des Fadens an beiden vorgesehenen Stellen bewirken. Eine solche Steuerung der Arbeitselemente 20, 23 und 25, bzw. die im Steuergerät 21 nötigen Schaltungen, sind jedem Fachmann geläufig und brauchen hier nicht beschrieben zu werden.The thread sensor 25 is connected to the control unit 21 via a line 29. Depending on the type of thread sensor 25 selected, this line 29 can also be an electrical, a pneumatic, a hydraulic, a mechanical, etc. According to the invention, the control elements 21, 22, 24 and 29 must meet a single condition, namely that if there is no thread in the thread sensor 25 (ie if the latter no longer feels thread 10 in the area of its slot 26), both thread separating elements 20 and 23 via the lines 22 and 24 be operated and cause the separation of the thread at both designated locations. Such a control of the working elements 20, 23 and 25, or the circuits required in the control device 21, are familiar to any person skilled in the art and need not be described here.

Das zweite Fadentrennelement 23 und die in seiner unmittelbaren Nähe liegende Fadenöse 11 der Anordnung der Fig. 1 und 2 können vorteilhafterweise, wie Fig. 3 zeigt, in einem einzigen Fadentrennelement 30 kombiniert werden. Dieses besteht z. B. aus einer unteren Platte 31, in welcher eine passende Bohrung 32 als Fadenöse mit Einfädelungsschlitz 33 vorhanden ist, und aus einem Messer 34, welches um eine Achse 35 auf die Platte 31 schwenkbar gelagert ist und mittels eines Zylinder/Kolbensystems 36 zur Schneideoperation geschwenkt werden kann. Bei der Schwenkung des Messers 34 wird dann der durch die Fadenöse gehende Faden zwischen dem oberen Rand der Bohrung 32 und der unteren, vorderen Kante des Messers 34 durchgetrennt.The second thread separating element 23 and the thread eyelet 11 in the immediate vicinity of the arrangement of FIGS. 1 and 2 can advantageously be combined in a single thread separating element 30, as shown in FIG. 3. This consists e.g. B. from a lower plate 31, in which a suitable bore 32 is present as a thread eyelet with threading slot 33, and from a knife 34 which is pivotally mounted about an axis 35 on the plate 31 and pivoted by means of a cylinder / piston system 36 for the cutting operation can be. When the knife 34 is pivoted, the thread passing through the thread eyelet is then severed between the upper edge of the bore 32 and the lower, front edge of the knife 34.

Die hier gezeigte Lösung der Kombination einer Fadenöse mit einer Fadentrennvorrichtung, welche hier stellvertretend für viele andere denkbare Varianten aufgeführt wurde, weist den Vorteil der Einfachheit auf.The solution shown here of combining a thread eyelet with a thread separating device, which was listed here as representative of many other conceivable variants, has the advantage of simplicity.

In Fig.4 wird ferner die Anwendung der erfindungsgemäßen Anordnung in einer Streckexturierzwirnmaschine gezeigt, wobei die gleichen Elemente wie in der Anordnung der Fig. 1 und 2 mit denselben Bezugszahlen bezeichnet werden. Anders gegenüber der Anordnung der Fig. 1 und 2 ist hier die Tatsache, daß der Faden in dieser Maschine nicht nur einem Streckprozeß, sondern auch einem Texturierprozeß unter Temperaturerhöhung, unterworfen ist. Der Weg von der Vorlagespule 1 bis zur Spindel 16, bzw. zur Aufwickelspule 15, ist also hier wesentlich länger und komplizierter. Die Darstellung der Fig. 4, in welcher schematisch eine Strecktexturierzwirnmaschine für das sogenannte Simultan-Verfahren gezeigt wird, weist, in Fadenlaufrichtung gesehen, eine erste Fadenführung 37, ein Zufuhrwerk 38 aus zwei Walzen, einen Heizer 39, in welchem der Faden z. B. durch Kontakt auf eine bestimmte Temperatur erwärmt wird, ein Falschdrahtorgan 40 (z. B. in der Form eines Mehrschreiben-Falschdrahtorgans), mit welchem dem Faden zwischen der Drall-Stop-Role 41 und dem Organ 40 eine Falschdrehung erteilt, eine Streckrolle 7, auf welcher der Faden mit mehreren Windungen aufgewickelt wird und welche gestattet, den Faden in der Texturierzone unter Spannung durch Verstrecken zu halten (weshalb vom Kräuseln während des Streckens, d. h. simultan, geredet wird) und schließlich die Fadenöse 11 mit Ballon 12 und Ring 13 mit Läufer 14 auf. Die Anordnung der Elemente nach der Streckrolle 7 entspricht genau derjenigen der Fig. 1 und 2 und auch hier ist die zu lösende Aufgabe, d. h. die Verhinderung der Gefahr der Abspulung der Aufwickelspule 15, dieselbe wie dort. Die Anordnung des zweiten Fadentrennelementes 23 und des Fadenfühlers 25 entspricht genau derjenigen der Fig. 1 und 2: lediglich das erste Fadentrennelement 20 ist in Fadenlaufrichtung, nicht wie in der Anordnung der Fig. 1 unmittelbar vor der Streckrolle 7, sondern vor den obengenannten Arbeitsorganen 38 bis 41 plaziert. Das Fadentrennelement 20 trennt also, wenn betätigt, den Faden unmittelbar nach der Vorlagespule 1. Erfindungsgemäß ist es jedoch unerheblich, wo genau das erste Fadentrennelement im Fadenlauf plaziert wird: es muß nur vor der Streckrolle 7 den Faden trennen können.FIG. 4 also shows the use of the arrangement according to the invention in a stretch texturing twisting machine, the same elements as in the arrangement of FIGS. 1 and 2 being designated with the same reference numbers. Unlike the arrangement of FIGS. 1 and 2, the fact that the thread in this machine is not only subjected to a drawing process, but also to a texturing process with an increase in temperature, is different here. The path from the supply spool 1 to the spindle 16, or to the take-up spool 15, is therefore much longer and more complicated here. The illustration in FIG. 4, in which a stretch texturing twisting machine for the so-called simultaneous process is shown schematically, has a first thread guide 37, seen in the thread running direction, a feed mechanism 38 consisting of two rollers, a heater 39, in which the thread z. B. heated by contact to a certain temperature, a false twist member 40 (z. B. in the form of a multi-letter false twist member), with which the thread between the twist-stop role 41 and the organ 40 gives a false twist, a stretching roll 7, on which the thread is wound with several turns and which allows the thread in the texturing zone to be kept under tension by stretching (which is why we are talking about crimping during stretching, ie simultaneously) and finally the thread eyelet 11 with balloon 12 and ring 13 with runner 14. The arrangement of the elements after the stretching roller 7 corresponds exactly to that of FIGS. 1 and 2 and here too the task to be solved, ie the prevention of the risk of the reel 15 being unwound, is the same as there. The arrangement of the second thread separating element 23 and the thread sensor 25 corresponds exactly to that of FIGS. 1 and 2: only the first thread separating element 20 is in the thread running direction, not directly in front of the stretching roller 7 as in the arrangement of FIG. 1, but in front of the above-mentioned working members 38 placed to 41. The thread separating element 20 thus, when actuated, separates the thread immediately after the supply spool 1. According to the invention, however, it is irrelevant where exactly the first thread separating element is placed in the thread path: it only has to be able to separate the thread in front of the stretching roller 7.

Auch hier sind die Fadentrennelemente 20 und 23 und der Fadenfühler 25 mittels der Leitungen 22, 24 und 29 mit dem Steuergerät 21 verbunden, und die Steuerung der Fadentrennelemente 20 und 23 erfolgt in genau gleicher Weise wie im Falle der Anordnung der Fig. 1 und 2. Auch in Fig. 4 wird mit m der Fadenlauf gezeigt, welchem der Faden beim Abspulen von der Spule 15 folgen würde, falls dies nicht durch die vorliegende erfindungsgemäße Anordnung verhindert würdeHere, too, the thread separating elements 20 and 23 and the thread sensor 25 are connected to the control device 21 by means of the lines 22, 24 and 29, and the thread separating elements 20 and 23 are controlled in exactly the same way as in the case of the arrangement of FIGS. 1 and 2 4 also shows the thread run with m, which the thread would follow when unwinding from the bobbin 15, if this were not prevented by the arrangement according to the invention

Die Anordnungen der Fig. 1 und 2, bzw. 4, funktionieren nun folgendermaßen:

  • Wenn, aus irgendeinem Grund (z. B. weil sich zwischen der Vorlagespule 1 und der Streckrolle 7 ein Fadenbruch ereignet hat, oder weil sich ein Fadenbruch zwischen der Streckrolle 7 und der Spindel 16, bzw. der Aufwickelspule 15, ereignet hat, der weiter von der Streckrolle 7 aus der Vorlagespule 1 abgezogene Faden sich auf die Streckrolle 7 aufwickelt, oder weil die Vorlagespule 1 fertig war und das auslaufende Fadenende sich nicht von der Oberfläche der Streckrolle 7 trennen konnte und der Faden, der Abspulbahn m folgend, nun von der Spule 15 abgespult wird) der Fadenfühler 25 keine zwischen der Streckrolle 7 und der Fadenöse 11 normal laufende Fäden mehr spürt, wird er dem Steuergerät 21 ein signal in passender Form abgeben. Das Steuergerät 21 veranlaßt sofort die Betätigung der beiden Fadentrennelemente 20 und 23, womit der Faden mit Sicherheit vor und nach der Rolle 7 so durchgetrennt wird, daß jede Wickelbildung auf der Rolle 7 verunmöglicht wird. Diese Sicherheit wird erfindungsgemäß dadurch erreicht, daß beide möglichen Fadenzufuhrrichtungen zur Rolle 7, nämlich ausgehend von der Vorlagespule 1 und von der Aufwickelspule 15 bei deren Abspulung, unterbrochen werden.
The arrangements of FIGS. 1 and 2 or 4 now function as follows:
  • If, for some reason (e.g. because a thread break has occurred between the supply spool 1 and the drawing roller 7, or because a thread break has occurred between the drawing roller 7 and the spindle 16 or the take-up spool 15, respectively), the further thread drawn from the supply roll 7 from the supply spool 1 winds itself up on the draw roll 7, or because the supply spool 1 was finished and the thread end running out could not separate from the surface of the draw roll 7 and the thread, following the unwinding path m, now from the Spool 15 is unwound) the thread sensor 25 no longer senses normal running threads between the stretching roller 7 and the thread eyelet 11, it will give the control unit 21 a signal in a suitable form. The control device 21 immediately causes the actuation of the two thread separating elements 20 and 23, with which the thread is certainly cut before and after the roll 7 so that any winding formation on the roll 7 is impossible. This security is achieved according to the invention in that both possible thread feed directions to the roll 7, namely starting from the supply spool 1 and from the take-up spool 15 when they are unwound, are interrupted.

Es sei ferner bemerkt, daß das Fadentrennelement 23 so plaziert werden muß, daß es den der Abspulbahn m folgenden Faden durchtrennen muß: es darf jedoch ohne weiteres, wie im gezeigten Fall der Variante der Fig. 3, auch z. B. die Laufbahn des normal laufenden Fadens 10 durchschneiden.It should also be noted that the thread separating element 23 must be placed in such a way that it must sever the thread following the unwinding path m: however, as in the case of the variant of FIG. B. cut the track of the normal running thread 10.

Die Vorteile der beschriebenen erfindungsgemäßen Überwachungsanordnung sind, neben der bereits erwähnten hohen Zuverlässigkeit, ihre leichte, nachträgliche Einbaubarkeit bei schon vorhandenen Textilmaschinen für die Verarbeitung von endlosen Filamenten sowie die Tatsache, daß die Wickelbildung bereits vor ihrer Entstehung verhindert wird. Die beschriebene Überwachungsanordnung läßt sich vorteilhafterweise an Streckzwirnmaschinen und an Strecktexturierzwirnmaschinen verwenden, und in diesen hier beschriebenen Verwendungen kann dann die Rolle 7 eine sogeannte Streokrolte sein.The advantages of the described monitoring arrangement according to the invention are, in addition to the already mentioned high reliability, their easy, subsequent installation in existing textile machines for the processing of endless filaments and the fact that the winding formation is prevented even before it occurs. The monitoring arrangement described can advantageously be used on draw twisting machines and on draw texturing twisting machines, and in these uses described here the roll 7 can then be a so-called streokrolte.

Claims (6)

1. Monitoring apparatus for a textile machine equipped with at least one roll and a ring/spindle system and in which a thread is guided along a path from a feed package to a wind-up package mounted on the spindle firstly around the cylindrical surface of the roll, being wound with at least one turn, and thereafter via a thread guide coaxial with the spindle axis to the ring/spindle system, characterised by the following elements:
- a first thread cutting element (2) located before the roll (7) considered in the direction of movement of the thread and which when operated cuts the running thread between the feed package (1) and the roll (7),
- a second thread cutting element (25, 30) located immediately adjacent the thread guide (11) and which when operated cuts, between the roll (7) and wind-up package (15), the thread which in the event of a fault may be running back form the wind-up package (15) onto the roll (7),
- a thread sensor (25), having an open slot, located in the path of the normally running thread (10) between the roll (7) and the thread guide (11) and the slot (26), of which can release the thread in a plane which is substantially normal to the roll axis (8) and is open form the side where the roll (7) is located,
- a control device (21) which effects operation of both thread cutting elements (20 and 23; 30) when the thread is missing form the slot (26) of the thread sensor (25).
2. Monitoring apparatus according to claim 1 characterised in that the second cutting element (30) is also formed as thread guide (11).
3. Use of the monitoring apparatus according to claim 1 in a textile machine for processing of endless filament.
4. Use of the monitoring apparatus according to claim 3, characterised in that the machine is a draw twisting machine.
5. Use of the monitoring apparatus according to claim 3, characterised in that the machine is a drawtexturise-twisting machine.
6. Use of the monitoring apparatus according to claim 4 or 5, characterised in that the roll (7) is a draw roll.
EP81100231A 1980-02-28 1981-01-14 Control arrangement for a textile machine Expired EP0035098B1 (en)

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JPS6026137Y2 (en) * 1982-09-28 1985-08-06 村田機械株式会社 Yarn cutting device in yarn twisting machine
CH670663A5 (en) * 1986-01-22 1989-06-30 Tashkent Sp K B Textil Mash
CN115948831B (en) * 2023-03-10 2023-06-20 微山虹纬纺织科技有限公司 Spinning equipment control system and control device

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