EP0603512A1 - Device for registering textile sliver breakages, before the drafting machine - Google Patents

Device for registering textile sliver breakages, before the drafting machine Download PDF

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Publication number
EP0603512A1
EP0603512A1 EP93117866A EP93117866A EP0603512A1 EP 0603512 A1 EP0603512 A1 EP 0603512A1 EP 93117866 A EP93117866 A EP 93117866A EP 93117866 A EP93117866 A EP 93117866A EP 0603512 A1 EP0603512 A1 EP 0603512A1
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EP
European Patent Office
Prior art keywords
slivers
sliver
monitoring
textile
monitoring device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93117866A
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German (de)
French (fr)
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EP0603512B1 (en
Inventor
Friedrich Hauner
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
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Rieter Ingolstadt Spinnereimaschinenbau AG
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Publication of EP0603512A1 publication Critical patent/EP0603512A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/005—Arrangements for feeding or conveying the slivers to the drafting machine
    • 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
    • D01H13/1616—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 characterised by the detector
    • D01H13/1658—Associated actuators with mutual actuation, e.g. for two or more running yarns

Definitions

  • the invention relates to a device for detecting breaks in textile slivers in front of a stretch of the textile industry.
  • the device must detect the sliver breakage of the slivers in the vicinity of or within a feeder for textile slivers, i.e. even before entering the track.
  • the slivers are removed from cans and fed to the pair of rollers on the infeed table of the drafting system via a feed device.
  • the feed device is located in a section in front of the infeed table of a drafting system.
  • the cans with the sliver to be processed are placed on both sides or only on one side of the feed device.
  • the sliver of each jug is pulled vertically upward from the jug and deflected by the feed device by approx. 90 ° in the direction of the draw frame.
  • the fiber slivers of all cans are guided parallel to one another by the feed device, this fiber sliver guide being increased compared to the drafting system.
  • the slivers leave the feed device by being guided away from the feed device, inclined downwards, to the draw frame.
  • a monitoring device is arranged in the transport path of the sliver, which detects and signals a sliver break.
  • the signal for a band break causes the line to stop, so that the operating personnel can connect the broken band ends before entering the line.
  • the monitoring device can be arranged within the feed device or between the feed device and the route.
  • a belt break of the running belt is detected by the belt end swiveling down from its transport path after leaving the feed device and being detected by the monitoring path of the monitoring device.
  • the monitoring device works on the optical light barrier principle.
  • Such a known monitoring device between the draw frame and the feed device is shown in the "Drawings" brochure, September 1991, p. 11 of the Rieter Spinning Systems.
  • the object of the invention is to improve the security of the detection of band breaks of textile slivers provided at very high feed speeds of the sliver of a draw frame.
  • the monitoring device for detecting sliver breaks can be located in the vicinity of the feed device, i.e. lie on the side of the sliver running away or within the feed device.
  • a feature according to the invention is that the monitoring device is arranged with a deflection device for the slivers, so that the sliver breaks are detected with greater certainty.
  • the deflection device is arranged in the vicinity of the monitoring device, ie in the transport direction of the slivers before or after the monitoring device.
  • the deflection device lies in a horizontal plane, which lies above the horizontal plane of the monitoring device, so that unbroken fiber slivers pass the monitoring device above their monitoring path.
  • the monitoring path works without contact with the sliver end to be detected. If a sliver end crosses the monitoring path, this is interrupted. This interruption forms a signal in the corresponding signal processing, which is used to stop the machine.
  • the deflecting device deflects the fiber tapes by pressing in the transport path, so that each tape gets a tension.
  • the tension generated is designed so that there are no incorrect delays.
  • the tension is nevertheless sufficiently dimensioned that, in the event of a ribbon break, the tension generated, despite the high ribbon feed speeds and the relatively low fiber ribbon weight, hurls the fiber ribbon end safely into the monitoring path of the monitoring device.
  • the deflection device can be a solid rod or a tubular rod made of low-wear material. The rod is arranged transversely to the running direction of all slivers. This has the advantage that the security of the detection of a strip break is increased with little technical effort.
  • a feed device 19.1 is arranged in front of the entry of a line 19.
  • the feed device consists of a frame 17 which is supported by stands such as stand 17.1.
  • a drive roller 3 is rotatably mounted on the frame in the horizontal, and a contact roller 4 is located directly thereon. Between the drive roller 3 and the contact roller 4, the sliver 1 is pulled out of the can 2.
  • the transport path of the sliver 1 continues to a belt guide roller 5, which is also rotatably mounted.
  • spacer rings are incorporated so that a sliver does not come into contact with the other slivers.
  • a feed device 19.1 can be constructed in two ways. Either as a roller feed, which corresponds to the type shown (Fig. 1), or as a feed frame. The difference is that the drive of the route via a belt drive, which is laid in the frame 17, the drive roller 3 and others are driven. These drive means are dispensed with in the feed frame.
  • the sliver 1 After passing the tape guide roller 5, the sliver 1 leaves the feed device 19.1.
  • the transport path of the sliver is now on an inclined plane inclined down to the inlet of the route 19.
  • the sliver 1 passes a belt guide 8, which holds the belts at a fixed distance from each other.
  • the belts run into the loading roller pair 9, 9 'via the inlet table 18. From there it goes directly into the drafting system (which was no longer shown in the figure).
  • the monitoring device has a monitoring path. The monitoring path works on the optical light barrier principle.
  • the monitoring path is arranged transversely to the transport tracks of the slivers and runs at a distance below the transport tracks.
  • the monitoring device must not be arranged too far from the entry of the line, ie an arrangement in the middle area of the feed device 19.1 would not make sense because fiber band breaks behind the monitoring device in the direction of the entry of the line would not be detected.
  • the monitoring device must not be installed too close to the inlet of the line 19, because otherwise the end of the line between the roller pairs of the line disappears due to the high strip feed speed and can no longer be connected to the other end of the break with little effort.
  • the monitoring device is therefore preferably arranged before or after the tape guide roller, but in its immediate vicinity. Starting from FIG. 1, which represents the known prior art, FIG.
  • FIG. 2 shows the device according to FIG. 1 in a plan view for better understanding.
  • the feed device 19.1 shown in FIG. 2 is a roller feed in the special case.
  • the filled cans 2, 20, 21, 22, 23, 24, 25, 26 can be seen below the frame 17 .
  • the sliver 1 is conveyed out of the can 2 between the drive roller 3 and the contact roller 4.
  • the sliver 10 it is the drive roller 31 with the contact roller 41.
  • the sliver 11 it is the drive roller 33 with the contact roller 43 and in the sliver 12 it is the drive roller 35 with the contact roller 45.
  • the sliver 16 removed from the can 20 and is located between the drive roller 30 and the contact roller 40.
  • the sliver 15 is removed from the can 22 and is located between the drive roller 32 and contact roller 42.
  • the sliver 14 is removed from the can 24 and is located between the drive roller 34 and Contact roller 44.
  • the sliver 13 is removed from the can 26 and is located between the drive roller 36 and the contact roller 46.
  • FIG. 2 also shows that the monitoring device consists of an optical transmitter / receiver 6 and the associated optical reflector 7. These are arranged in a plane to one another and are located between the fiber ribbons and the frame 17. The optical transmitter / receiver 6 continuously emits a light beam, which is reflected by the reflector 7 onto the receiver. This is the surveillance route. If this light path (light barrier) is interrupted, the path is stopped, ie the sliver feed also comes to a standstill.
  • FIG. 3 shows the arrangement of a monitoring device between the feed device and the line.
  • the feed device is shown in part as a roll feed.
  • FIG. 3a shows in detail the use of a deflection device according to the invention in the vicinity of the monitoring device.
  • a deflection rod 60 or 61 with a circular or elliptical cross section is used as the deflection device. It is also possible to use a pipe. The material is low-friction.
  • the monitoring device consisting of optical transmitter / receiver 6 and optical reflector 7, is thus arranged in combination with the deflecting rods 60, 61.
  • the deflecting rods lie transversely to the transport path of the slivers in front of the monitoring device, ie that the slivers first pass the deflecting rods before they enter Come close to the monitoring device.
  • the sliver 60 deflects the sliver 1 from the original position to the sliver 1 '. This deflection takes place for all slivers at the same time. This deflection gives the slivers a pretension. This pretension is relatively low, but sufficient to hurl the end of the sliver through the pretension in the event of a sliver breakage, so that it can surely interrupt the monitoring path (optical light barrier) of the monitoring device for a short time.
  • the deflecting rod can not only be arranged in front of the monitoring device as shown in FIG. 3, but also in the vicinity of the monitoring device. This is another feature of the invention.
  • Optical transmitter / receiver 6 and optical reflector 7 are each rigidly attached to the axis for the tape guide rollers 5, 50 by their brackets 6.1 and 7.1. The monitoring device is firmly positioned in this position.
  • FIG. 5 shows excerpts of a feed device which is designed as a feed frame 19.2.
  • the monitoring device is arranged inside and at the end of the feed frame.
  • the monitoring device with a deflection rod can also be arranged in front of the belt guides 100, 101.

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

Abstract

The invention relates to a device for recording breaks of textile fibre slivers upstream of a drafting machine in the textile industry. The device has to record the sliver break of presented fibre slivers. The object of the invention is, at very high sliver draw-in speeds of a drafting machine (19), to improve the reliability of the recording of sliver breaks of presented textile fibre slivers. A feature according to the invention is that the monitoring device (6) is arranged with a deflecting device (60) for the fibre slivers. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Erfassung von Brüchen textiler Faserbänder vor einer Strecke der Textilindustrie. Die Vorrichtung muß den Bandbruch vorgelegter Faserbänder in Nähe oder innerhalb einer Zuführvorrichtung für textile Faserbänder erfassen, d.h. noch vor dem Einlauf in die Strecke.The invention relates to a device for detecting breaks in textile slivers in front of a stretch of the textile industry. The device must detect the sliver breakage of the slivers in the vicinity of or within a feeder for textile slivers, i.e. even before entering the track.

Die Faserbänder werden aus Kannen entnommen und über eine Zuführvorrichtung dem Walzenpaar auf dem Einlauftisch des Streckwerkes zugeführt. Die Zuführvorrichtung befindet sich in einem Abschnitt vor dem Einlauftisch eines Streckwerkes. Beiderseits oder nur auf einer Seite der Zuführvorrichtung sind die Kannen mit dem zu verarbeitenden Faserband abgestellt. Das Faserband jeder Kanne wird senkrecht aus der Kanne nach oben abgezogen und durch die Zuführvorrichtung um ca. 90° in Richtung zur Strecke umgelenkt. Die Faserbänder aller Kannen werden durch die Zuführvorrichtung parallel zueinander geführt, wobei diese Faserbandführung gegenüber dem Streckwerk erhöht ist. Die Faserbänder verlassen die Zuführvorrichtung, indem sie von der Zuführvorrichtung weg, schräg nach unten geneigt, zur Strecke geführt werden. Beim Transport der zur Strecke vorgelegten Faserbänder können einzelne Faserbänder brechen. Ursache sind meist ablagebedingte Fehler des Bandes. Zu diesem Zweck ist in der Transportbahn des Faserbandes eine Überwachungsvorrichtung angeordnet, die einen Bandbruch erfaßt und signalisiert. Das Signal für einen Bandbruch veranlasst einen Stop der Strecke, so daß durch das Bedienungspersonal die gebrochenen Bandenden noch vor Einlauf in die Strecke verbunden werden können. Die Überwachungsvorrichtung kann innerhalb der Zuführvorrichtung oder zwischen Zuführvorrichtung und Strecke angeordnet sein.The slivers are removed from cans and fed to the pair of rollers on the infeed table of the drafting system via a feed device. The feed device is located in a section in front of the infeed table of a drafting system. The cans with the sliver to be processed are placed on both sides or only on one side of the feed device. The sliver of each jug is pulled vertically upward from the jug and deflected by the feed device by approx. 90 ° in the direction of the draw frame. The fiber slivers of all cans are guided parallel to one another by the feed device, this fiber sliver guide being increased compared to the drafting system. The slivers leave the feed device by being guided away from the feed device, inclined downwards, to the draw frame. At the Transport of the slivers presented to the route can break individual slivers. The cause is usually storage-related errors in the belt. For this purpose, a monitoring device is arranged in the transport path of the sliver, which detects and signals a sliver break. The signal for a band break causes the line to stop, so that the operating personnel can connect the broken band ends before entering the line. The monitoring device can be arranged within the feed device or between the feed device and the route.

Ein Bandbruch des laufenden Bandes wird erfaßt, indem das Bandende nach Verlassen der Zuführvorrichtung aus seiner Transportbahn nach unten schwenkt und dabei durch die Überwachungswegstrecke der Überwachungsvorrichtung erfaßt wird. Die Überwachungsvorrichtung arbeitet bekannterweise nach dem optischen Lichtschrankenprinzip. Eine solche bekannte Überwachungsvorrichtung zwischen Strecke und Zuführvorrichtung ist im Prospekt "Strecken", September 1991, S. 11 der Rieter Spinning Systems dargestellt.A belt break of the running belt is detected by the belt end swiveling down from its transport path after leaving the feed device and being detected by the monitoring path of the monitoring device. As is known, the monitoring device works on the optical light barrier principle. Such a known monitoring device between the draw frame and the feed device is shown in the "Drawings" brochure, September 1991, p. 11 of the Rieter Spinning Systems.

Mit den hohen, praktizierten Einzugsgeschwindigkeiten des Faserbandes tritt das Problem auf, daß nicht jeder Bandbruch durch die Überwachungsvorrichtung sicher erfaßt wird. Bei den hohen Einzugsgeschwindigkeiten des Faserbandes kommt es vor, daß das Bandende aufgrund des relativ geringen Gewichtes erst nach der Überwachungsvorrichtung eine Falltiefe in Höhe deren Überwachungswegstrecken erreicht, so daß das fallende Bandende kein Signal auslösen konnte. In einem solchen Fall durchläuft das Bandende die Belastungs- bzw. Kontaktwalzen im Einlauf der Strecke und wird erst dort als Bandbruch erkannt. Das hat den Nachteil, daß die Bandenden nicht mehr verknüpft werden können, sondern es muß ein neuer Bandanfang eingefädelt werden. Das ist wesentlich zeitaufwendiger als das Verbinden der Bandenden noch vor dem Einlauf in die Strecke.With the high, practiced retraction speeds of the sliver, the problem arises that not every sliver break is reliably detected by the monitoring device. Given the high retraction speeds of the sliver, it happens that, due to the relatively low weight, the sliver end only reaches a depth of fall equal to the monitoring distance after the monitoring device, so that the falling sliver end could not trigger a signal. In such a case, the end of the strip passes through the loading or contact rollers at the end of the line and is only recognized there as a strip break. This has the disadvantage that the ends of the tape can no longer be linked, but a new beginning of the tape must be threaded. This is much more time-consuming than connecting the ends of the strips before they enter the line.

Aufgabe der Erfindung ist es, bei sehr hohen Einzugsgeschwindigkeiten des Faserbandes einer Strecke, die Sicherheit der Erfassung von Bandbrüchen vorgelegter textiler Faserbänder zu verbessern.The object of the invention is to improve the security of the detection of band breaks of textile slivers provided at very high feed speeds of the sliver of a draw frame.

Die Überwachungsvorrichtung zur Erfassung von Faserbandbrüchen kann in Nähe der Zuführvorrichtung, d.h. auf der Seite der weglaufenden Faserbänder oder innerhalb der Zuführvorrichtung liegen.The monitoring device for detecting sliver breaks can be located in the vicinity of the feed device, i.e. lie on the side of the sliver running away or within the feed device.

Ein erfindungsgemäßes Merkmal ist, daß die Überwachungsvorrichtung mit einer Umlenkvorrichtung für die Faserbänder angeordnet ist, so daß die Faserbandbrüche mit höherer Sicherheit erfaßt werden. Die Umlenkvorrichtung ist in Nähe der Überwachungsvorrichtung, d.h. in Transportrichtung der Faserbänder vor oder nach der Überwachungsvorrichtung angeordnet. Die Umlenkvorrichtung liegt in einer horizontalen Ebene, die über der horizontalen Ebene der Überwachungsvorrichtung liegt, so daß ungebrochene Faserbänder die Überwachungsvorrichtung oberhalb deren Überwachungswegstrecke passieren. Die Überwachungswegstrecke arbeitet berührungslos gegenüber dem zu detektierenden Faserbandende. Passiert ein Faserbandende quer die Überwachungswegstrecke, wird diese unterbrochen. Diese Unterbrechung bildet in der entsprechenden Signalverarbeitung ein Signal, welches dazu benutzt wird, die Maschine zu stoppen.A feature according to the invention is that the monitoring device is arranged with a deflection device for the slivers, so that the sliver breaks are detected with greater certainty. The deflection device is arranged in the vicinity of the monitoring device, ie in the transport direction of the slivers before or after the monitoring device. The deflection device lies in a horizontal plane, which lies above the horizontal plane of the monitoring device, so that unbroken fiber slivers pass the monitoring device above their monitoring path. The monitoring path works without contact with the sliver end to be detected. If a sliver end crosses the monitoring path, this is interrupted. This interruption forms a signal in the corresponding signal processing, which is used to stop the machine.

Ein weiteres Merkmal ist, daß die Umlenkvorrichtung die Faserbänder durch Anpressung in der Transportbahn umlenkt, so daß jedes Band eine Anspannung bekommt. Die erzeugte Anspannung ist so gestaltet, daß es zu keinen Fehlverzügen kommt. Die Anspannung ist dennoch ausreichend dimensioniert, daß bei einem Bandbruch die erzeugte Anspannung, trotz der hohen Bandeinzugsgeschwindigkeiten und des relativ geringen Faserbandgewichtes, das Faserbandende sicher in die Überwachungswegstrecke der Überwachungsvorrichtung schleudert. Die Umlenkvorrichtung kann ein massiver Stab oder ein rohrförmiger Stab aus verschleißarmem Material sein. Der Stab ist quer zur Laufrichtung aller Faserbänder angeordnet. Es ergibt sich der Vorteil, daß mit geringem technischen Aufwand die Sicherheit der Erfassung eines Bandbruches erhöht wird.Another feature is that the deflecting device deflects the fiber tapes by pressing in the transport path, so that each tape gets a tension. The tension generated is designed so that there are no incorrect delays. The tension is nevertheless sufficiently dimensioned that, in the event of a ribbon break, the tension generated, despite the high ribbon feed speeds and the relatively low fiber ribbon weight, hurls the fiber ribbon end safely into the monitoring path of the monitoring device. The deflection device can be a solid rod or a tubular rod made of low-wear material. The rod is arranged transversely to the running direction of all slivers. This has the advantage that the security of the detection of a strip break is increased with little technical effort.

Die Erfindung wird an einem nachfolgenden Ausführungsbeispiel erläutert. Dabei zeigen

Figur 1
schematische Ansicht einer bekannten Überwachungsvorrichtung zwischen Zuführvorrichtung und Strecke
Figur 2
Draufsicht zu Figur 1
Figur 3
Überwachungsvorrichtung mit Umlenkstab in der Draufsicht
Figur 4
Darstellung der erzeugten Vorspannung des Faserbandes durch den Umlenkstab vor der Überwachungsvorrichtung, wobei die Überwachungsvorrichtung zwischen Zuführvorrichtung und Strecke angeordnet ist.
Figur 5
Überwachungsvorrichtung mit Umlenkvorrichtung im Zuführgestell
Figur 1 zeigt ausschnittsweise den Einlauf einer Strecke 19. Am Einlauf sind zu erkennen ein Paar Belastungswalzen 9, 9', der Einlauftisch 18 und ein Bandführer 8.The invention is explained using a subsequent exemplary embodiment. Show
Figure 1
schematic view of a known monitoring device between the feed device and the line
Figure 2
Top view of Figure 1
Figure 3
Monitoring device with deflection rod in top view
Figure 4
Representation of the pretension of the sliver produced by the deflecting rod in front of the monitoring device, the monitoring device being arranged between the feed device and the draw frame.
Figure 5
Monitoring device with deflection device in the feed frame
FIG. 1 shows a section of the entry of a section 19. At the entry, a pair of loading rollers 9, 9 ', the entry table 18 and a belt guide 8 can be seen.

Vor dem Einlauf einer Strecke 19 ist eine Zuführvorrichtung 19.1 angeordnet. Die Zuführvorrichtung besteht aus einem Rahmen 17, der durch Ständer wie beispielsweise den Ständer 17.1 getragen wird. Am Rahmen sind in der Horizontalen, drehbar gelagert eine Antriebswalze 3 und unmittelbar daraufliegend eine Kontaktwalze 4. Zwischen Antriebswalze 3 und Kontaktwalze 4 wird das Faserband 1 aus der Kanne 2 herausgezogen. Die Transportbahn des Faserbandes 1 geht weiter zu einer Bandführungswalze 5, die ebenfalls drehbar gelagert ist. In die Bandführungswalze 5, sind Abstandsringe eingearbeitet, so daß ein Faserband nicht in Berührung mit den anderen Faserbändern kommt.A feed device 19.1 is arranged in front of the entry of a line 19. The feed device consists of a frame 17 which is supported by stands such as stand 17.1. A drive roller 3 is rotatably mounted on the frame in the horizontal, and a contact roller 4 is located directly thereon. Between the drive roller 3 and the contact roller 4, the sliver 1 is pulled out of the can 2. The transport path of the sliver 1 continues to a belt guide roller 5, which is also rotatably mounted. In the tape guide roller 5, spacer rings are incorporated so that a sliver does not come into contact with the other slivers.

Eine Zuführvorrichtung 19.1 kann nach zwei Arten aufgebaut sein. Entweder als Walzenzuführung, das entspricht der dargestellten Art (Fig. 1), oder als Zuführgestell. Der Unterschied besteht darin, daß vom Antrieb der Strecke über einen Riementrieb, der im Rahmen 17 verlegt ist, die Antriebswalze 3 und weitere angetrieben werden. Beim Zuführgestell wird auf diese Antriebsmittel verzichtet.A feed device 19.1 can be constructed in two ways. Either as a roller feed, which corresponds to the type shown (Fig. 1), or as a feed frame. The difference is that the drive of the route via a belt drive, which is laid in the frame 17, the drive roller 3 and others are driven. These drive means are dispensed with in the feed frame.

Das Faserband 1 verläßt nach Passieren der Bandführungswalze 5 die Zuführvorrichtung 19.1. Die Transportbahn des Faserbandes ist nunmehr in einer schiefen Ebene nach unten zum Einlauf der Strecke 19 geneigt. Das Faserband 1 passiert dabei einen Bandführer 8, der die Bänder in festgelegter Distanz zueinander hält. Die Bänder laufen über den Einlauftisch 18 in das Belastungswalzenpaar 9, 9' ein. Von da geht es unmittelbar in das Streckwerk (was in der Figur nicht mehr dargestellt wurde). Auf dem Weg des Faserbandes von der Zuführvorrichtung 19.1 zum Einlauf der Strecke 19, befindet sich in Nähe der Bandführungswalze 5 ein optischer Sender / Empfänger 6. Das ist die Überwachungsvorrichtung für die Faserbänder. Die Überwachungsvorrichtung hat eine Überwachungswegstrecke. Die Überwachungswegstrecke arbeitet nach dem optischen Lichtschrankenprinzip. Die Überwachungswegstrecke ist quer zu den Transportbahnen der Faserbänder angeordnet und verläuft in Abstand unter den Transportbahnen. Die Überwachungsvorrichtung darf nicht zu weit vom Einlauf der Strecke entfernt angeordnet sein, d.h. eine Anordnung im mittleren Bereich der Zuführvorrichtung 19.1 wäre nicht sinnvoll, weil Faserbandbrüche hinter der Überwachungsvorrichtung in Richtung auf den Einlauf der Strecke nicht erkannt würden. Andererseits darf die Überwachungsvorrichtung nicht zu nahe am Einlauf der Strecke 19 installiert sein, weil sonst aufgrund der hohen Bandeinzugsgeschwindigkeit, das Bandende zwischen den Walzenpaaren der Strecke verschwindet und nicht mehr mit dem anderen Bruchende bei geringem Aufwand verbunden werden kann. Die Überwachungsvorrichtung ist deshalb vorzugsweise vor oder nach der Bandführungswalze, aber in deren unmittelbaren Nähe angeordnet. Ausgehend von Figur 1, die den bekannten Stand der Technik darstellt, ist in Figur 2 zum besseren Verständnis die Vorrichtung nach Figur 1 in einer Draufsicht dargestellt. Die in Figur 2 dargestellte Zuführvorrichtung 19.1 ist im speziellen Fall eine Walzenzuführung. Unterhalb des Rahmens 17 sind die gefüllten Kannen 2, 20, 21, 22, 23, 24, 25, 26 zu erkennen. Ausgehend von diesen Kannen wird das Faserband 1 aus der Kanne 2 zwischen Antriebswalze 3 und Kontaktwalze 4 befördert. Beim Faserband 10 ist es die Antriebswalze 31 mit der Kontaktwalze 41. Beim Faserband 11 ist es die Antriebswalze 33 mit der Kontaktwalze 43 und beim Faserband 12 ist es die Antriebswalze 35 mit der Kontaktwalze 45. Auf der gegenüberliegenden Seite des Rahmens 17 wird das Faserband 16 aus der Kanne 20 entnommen und befindet sich zwischen Antriebswalze 30 und Kontaktwalze 40. Das Faserband 15 wird entnommen aus der Kanne 22 und befindet sich zwischen Antriebswalze 32 und Kontaktwalze 42. Das Faserband 14 wird entnommen aus der Kanne 24 und befindet sich zwischen Antriebswalze 34 und Kontaktwalze 44. Das Faserband 13 wird entnommen aus der Kanne 26 und befindet sich zwischen Antriebswalze 36 und Kontaktwalze 46.After passing the tape guide roller 5, the sliver 1 leaves the feed device 19.1. The transport path of the sliver is now on an inclined plane inclined down to the inlet of the route 19. The sliver 1 passes a belt guide 8, which holds the belts at a fixed distance from each other. The belts run into the loading roller pair 9, 9 'via the inlet table 18. From there it goes directly into the drafting system (which was no longer shown in the figure). On the path of the sliver from the feed device 19.1 to the entry of the line 19, there is an optical transmitter / receiver 6 in the vicinity of the sliver guide roller 5. This is the monitoring device for the slivers. The monitoring device has a monitoring path. The monitoring path works on the optical light barrier principle. The monitoring path is arranged transversely to the transport tracks of the slivers and runs at a distance below the transport tracks. The monitoring device must not be arranged too far from the entry of the line, ie an arrangement in the middle area of the feed device 19.1 would not make sense because fiber band breaks behind the monitoring device in the direction of the entry of the line would not be detected. On the other hand, the monitoring device must not be installed too close to the inlet of the line 19, because otherwise the end of the line between the roller pairs of the line disappears due to the high strip feed speed and can no longer be connected to the other end of the break with little effort. The monitoring device is therefore preferably arranged before or after the tape guide roller, but in its immediate vicinity. Starting from FIG. 1, which represents the known prior art, FIG. 2 shows the device according to FIG. 1 in a plan view for better understanding. The feed device 19.1 shown in FIG. 2 is a roller feed in the special case. Below the frame 17 the filled cans 2, 20, 21, 22, 23, 24, 25, 26 can be seen. Starting from these cans, the sliver 1 is conveyed out of the can 2 between the drive roller 3 and the contact roller 4. In the sliver 10 it is the drive roller 31 with the contact roller 41. In the sliver 11 it is the drive roller 33 with the contact roller 43 and in the sliver 12 it is the drive roller 35 with the contact roller 45. On the opposite side of the frame 17, the sliver 16 removed from the can 20 and is located between the drive roller 30 and the contact roller 40. The sliver 15 is removed from the can 22 and is located between the drive roller 32 and contact roller 42. The sliver 14 is removed from the can 24 and is located between the drive roller 34 and Contact roller 44. The sliver 13 is removed from the can 26 and is located between the drive roller 36 and the contact roller 46.

Diese Faserbänder werden parallel und in einer Ebene auf der Zuführvorrichtung 19.1 geführt. Die Faserbänder werden von den Antriebswalzen weg zu den Bandführungswalzen 5, 50 geführt. Die Bandführungswalzen haben Abstandsringe, so daß ein Faserband nicht mit dem anderen in Berührung kommen kann. Die Faserbänder verlassen die Zuführvorrichtung 19.1 und erreichen den Einlauf der Strecke 19. Dort passieren sie den Bandführer 8 und werden durch das Belastungswalzenpaar 9, 9' erfaßt. Figur 2 zeigt weiterhin, daß die Überwachungsvorrichtung aus einem optischen Sender / Empfänger 6 sowie dem dazugehörigen optischen Reflektor 7 besteht. Diese sind zueinander in einer Ebene angeordnet und befinden sich zwischen Faserbändern und Rahmen 17. Der optische Sender / Empfänger 6 sendet ständig einen Lichtstrahl aus, der durch den Reflektor 7 zurückgeworfen wird auf den Empfänger. Das ist die Überwachungswegstrecke. Wird dieser Lichtweg (Lichtschranke) unterbrochen, wird die Strecke gestopt, d.h. auch der Faserbandeinzug kommt zum Stillstand.These slivers are guided in parallel and in one plane on the feed device 19.1. The slivers are guided away from the drive rollers to the ribbon guide rollers 5, 50. The tape guide rollers have spacer rings so that one sliver cannot come into contact with the other. The slivers leave the feed device 19.1 and reach the inlet of the section 19. There they pass the belt guide 8 and are gripped by the pair of loading rollers 9, 9 '. Figure 2 also shows that the monitoring device consists of an optical transmitter / receiver 6 and the associated optical reflector 7. These are arranged in a plane to one another and are located between the fiber ribbons and the frame 17. The optical transmitter / receiver 6 continuously emits a light beam, which is reflected by the reflector 7 onto the receiver. This is the surveillance route. If this light path (light barrier) is interrupted, the path is stopped, ie the sliver feed also comes to a standstill.

Aufgrund des relativ geringen Faserbandgewichtes und der sehr hohen Bandeinzugsgeschwindigkeiten wurde bisher ein vorliegender Bandbruch nicht sicher erfaßt. Oftmals erreichten gebrochende Faserbandenden erst nach der Überwachungsvorrichtung eine Falltiefe, die zum Unterbrechen der Überwachungswegstrecke (Lichtschranke) notwendig ist.Due to the relatively low sliver weight and the very high sliver feed speeds, a sliver break that has been present has not been reliably detected. Often, broken fiber sliver ends only reached a depth of fall after the monitoring device, which is necessary to interrupt the monitoring path (light barrier).

Figur 3 zeigt die Anordnung einer Überwachungsvorrichtung zwischen Zuführvorrichtung und Strecke. Im vorliegenden Fall ist die Zuführvorrichtung auszugsweise als Walzenzuführung dargestellt.FIG. 3 shows the arrangement of a monitoring device between the feed device and the line. In the present case, the feed device is shown in part as a roll feed.

Im Detail zeigt Figur 3a den Einsatz einer erfindungsgemäßen Umlenkvorrichtung in Nähe der Überwachungsvorrichtung. Als Umlenkvorrichtung wird ein Umlenkstab 60 bzw. 61 mit kreisförmigem oder elliptischem Querschnitt verwendet. Möglich ist auch die Verwendung eines Rohres. Das Material ist reibungsarm. Die Überwachungsvorrichtung, bestehend aus optischem Sender / Empfänger 6 und optischem Reflektor 7, wird somit kombiniert angeordnet mit den Umlenkstäben 60, 61. Die Umlenkstäbe liegen quer zur Transportbahn der Faserbänder vor der Überwachungsvorrichtung, d.h. daß die Faserbänder erst die Umlenkstäbe passieren, bevor sie in Nähe der Überwachungsvorrichtung kommen. Wie Figur 4 im einzelnen am Faserband 1 zeigt, wird durch den Umlenkstab 60 das Faserband 1 aus der ursprünglichen Lage umgelenkt zum Faserband 1'. Diese Umlenkung erfolgt für alle Faserbänder zugleich. Durch diese Umlenkung erhalten die Faserbänder eine Vorspannung. Diese Vorspannung ist relativ gering, aber ausreichend, um bei einem auftretenden Faserbandbruch das Faserbandende durch die Vorspannung nach unten zu schleudern, so daß es mit Sicherheit die Überwachungswegstrecke (optische Lichtschranke) der Überwachungsvorrichtung kurzzeitig unterbrechen kann.3a shows in detail the use of a deflection device according to the invention in the vicinity of the monitoring device. A deflection rod 60 or 61 with a circular or elliptical cross section is used as the deflection device. It is also possible to use a pipe. The material is low-friction. The monitoring device, consisting of optical transmitter / receiver 6 and optical reflector 7, is thus arranged in combination with the deflecting rods 60, 61. The deflecting rods lie transversely to the transport path of the slivers in front of the monitoring device, ie that the slivers first pass the deflecting rods before they enter Come close to the monitoring device. As FIG. 4 shows in detail on the sliver 1, the sliver 60 deflects the sliver 1 from the original position to the sliver 1 '. This deflection takes place for all slivers at the same time. This deflection gives the slivers a pretension. This pretension is relatively low, but sufficient to hurl the end of the sliver through the pretension in the event of a sliver breakage, so that it can surely interrupt the monitoring path (optical light barrier) of the monitoring device for a short time.

Der Umlenkstab kann nicht nur wie in Figur 3 dargestellt vor der Überwachungsvorrichtung, sondern auch in Nähe nach der Überwachungsvorrichtung angeordnet sein. Das ist ein weiteres Merkmal der Erfindung.The deflecting rod can not only be arranged in front of the monitoring device as shown in FIG. 3, but also in the vicinity of the monitoring device. This is another feature of the invention.

Die elektrischen Übertragungswege von der Lichtschranke zur Auswertevorrichtung sind nicht dargestellt, da sie allgemein bekannt sind. Optischer Sender / Empfänger 6 sowie optischer Reflektor 7 sind jeweils durch ihre Halterungen 6.1 bzw. 7.1 starr an der Achse für die Bandführungswalzen 5, 50 befestigt. Die Überwachungsvorrichtung ist in dieser Lage fest positioniert.The electrical transmission paths from the light barrier to the evaluation device are not shown since they are generally known. Optical transmitter / receiver 6 and optical reflector 7 are each rigidly attached to the axis for the tape guide rollers 5, 50 by their brackets 6.1 and 7.1. The monitoring device is firmly positioned in this position.

Figur 5 zeigt auszugsweise eine Zuführvorrichtung, die als Zuführgestell 19.2 ausgebildet ist. Die Überwachungsvorrichtung ist innerhalb und am Ende des Zuführgestells angeordnet.FIG. 5 shows excerpts of a feed device which is designed as a feed frame 19.2. The monitoring device is arranged inside and at the end of the feed frame.

Bei einem Zuführgestell 19.2 kann die Überwachungsvorrichtung mit Umlenkstab auch vor den Bandführern 100, 101 angeordnet sein.In the case of a feed frame 19.2, the monitoring device with a deflection rod can also be arranged in front of the belt guides 100, 101.

Claims (8)

Vorrichtung zur Erfassung von Brüchen textiler Faserbänder vor einer Strecke, wobei eine Überwachungsvorrichtung mit einer Überwachungswegstrecke in Nähe oder innerhalb einer Zuführvorrichtung für Faserbänder angeordnet ist und die Überwachungswegstrecke zur Erfassung von Faserbandbrüchen unterhalb der Faserbänder angeordnet sind, dadurch gekennzeichnet, daß eine Umlenkvorrichtung für Faserbänder, die in den Bändern eine Vorspannung erzeugt, in Nähe der Überwachungsvorrichtung angeordnet ist.Device for detecting breaks in textile slivers in front of a line, a monitoring device with a monitoring path being arranged in the vicinity or within a feed device for slivers and the monitoring path for detecting sliver breaks being arranged below the slivers, characterized in that a deflection device for slivers which a bias is generated in the bands, is arranged in the vicinity of the monitoring device. Vorrichtung zur Erfassung von Brüchen textiler Faserbänder vor einer Strecke nach Anspruch 1, dadurch gekennzeichnet, daß die Umlenkvorrichtung bezüglich der Transportrichtung der Faserbänder in Nähe vor oder nach der Überwachungsvorrichtung angeordnet ist.Device for detecting breaks in textile slivers in front of a draw frame according to claim 1, characterized in that the deflection device is arranged in the vicinity of the monitoring device in relation to the direction of transport of the slivers. Vorrichtung zur Erfassung von Brüchen textiler Faserbänder vor einer Strecke nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Umlenkvorrichtung in einer horizontalen Ebene liegt, die über der horizontalen Ebene der Überwachungswegstrecke liegt, so daß ungebrochene Faserbänder die Überwachungsvorrichtung oberhalb deren Überwachungswegstrecke passieren.Device for detecting breaks in textile slivers in front of a draw frame according to claim 1 or 2, characterized in that the deflecting device lies in a horizontal plane which is above the horizontal The level of the monitoring path lies so that unbroken slivers pass the monitoring device above their monitoring path. Vorrichtung zur Erfassung von Brüchen textiler Faserbänder vor einer Strecke nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Umlenkvorrichtung oberhalb der Bänder diese durch Anpressung umlenkt.Device for detecting breaks in textile fiber tapes in front of a draw frame according to one or more of claims 1 to 3, characterized in that the deflecting device above the tapes deflects them by pressing. Vorrichtung zur Erfassung von Brüchen textiler Faserbänder vor einer Strecke nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Umlenkvorrichtung ein Stab ist.Device for detecting breaks in textile slivers in front of a draw frame according to one or more of claims 1 to 4, characterized in that the deflection device is a rod. Vorrichtung zur Erfassung von Brüchen textiler Faserbänder vor einer Strecke nach Anspruch 5, dadurch gekennzeichnet, daß der Stab massiv oder rohrförmig ist.Device for detecting breaks in textile slivers in front of a draw frame according to claim 5, characterized in that the rod is solid or tubular. Vorrichtung zur Erfassung von Brüchen textiler Faserbänder vor einer Strecke nach Anspruch 5, dadurch gekennzeichnet, daß der Stab quer zur Bahn des Faserbandes angeordnet ist.Device for detecting breaks in textile slivers in front of a draw frame according to claim 5, characterized in that the rod is arranged transversely to the path of the sliver. Vorrichtung zur Erfassung von Brüchen textiler Faserbänder vor einer Strecke nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Umlenkvorrichtung aus reibungsarmem Material besteht.Device for detecting breaks in textile slivers in front of a draw frame according to one or more of claims 1 to 7, characterized in that the deflection device consists of low-friction material.
EP93117866A 1992-12-23 1993-11-04 Device for registering textile sliver breakages, before the drafting machine Expired - Lifetime EP0603512B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4243847 1992-12-23
DE4243847A DE4243847A1 (en) 1992-12-23 1992-12-23 Device for detecting breaks in textile slivers in front of a draw frame

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EP0603512A1 true EP0603512A1 (en) 1994-06-29
EP0603512B1 EP0603512B1 (en) 1996-08-28

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US (1) US5487208A (en)
EP (1) EP0603512B1 (en)
JP (1) JPH0770844A (en)
CZ (1) CZ261793A3 (en)
DE (2) DE4243847A1 (en)

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US6081972A (en) * 1997-09-27 2000-07-04 Rieter Ingolstadt Spinnereimaschinenbau Ag Fiber band feed apparatus with guide and monitor for breakage
US6058570A (en) * 1997-10-21 2000-05-09 Zellweger Luwa Ag Inflow sensor for a drawing equipment
DE19908371A1 (en) * 1999-02-26 2000-08-31 Truetzschler Gmbh & Co Kg Sliver drawing apparatus takes slivers from cans into straight and parallel paths through sliver thickness monitor to drawing unit giving high production speeds without fiber damage
DE10003861A1 (en) * 2000-01-28 2001-08-02 Truetzschler Gmbh & Co Kg Sliver monitor at a drawing unit has a passage through the sliver guide with an integrated transmitter and receiver system to register the presence and/or movement of the sliver
DE102005009157B4 (en) * 2005-02-25 2019-05-09 Trützschler GmbH & Co Kommanditgesellschaft Device on a spinning preparation machine e.g. Carding, carding, route o. The like. For monitoring fiber material
DE102005009159B4 (en) 2005-02-25 2021-08-12 Trützschler GmbH & Co Kommanditgesellschaft Device on a spinning preparation machine for monitoring at least one sliver
DE102008021218A1 (en) * 2008-04-28 2009-10-29 TRüTZSCHLER GMBH & CO. KG Monitoring device for at least one running sliver at a drafting of a textile machine, eg. Track, card, combing machine o.
CN102367604A (en) * 2011-05-25 2012-03-07 余叔慧 Sliver fracture and sliver rushing warning device for multi-path drawing frame
CN102367605A (en) * 2011-07-14 2012-03-07 余叔慧 Knitting fiber sliver fracture detector
CN103510254B (en) * 2013-09-18 2015-07-08 浙江美惠地毯有限公司 Output yarn traction method of yarns for carpet production and special creel
CN112226858A (en) * 2020-09-18 2021-01-15 张家港市光明毛纺织有限公司 Drawing frame capable of reducing bar connecting time

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Also Published As

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CZ261793A3 (en) 1994-07-13
JPH0770844A (en) 1995-03-14
EP0603512B1 (en) 1996-08-28
DE4243847A1 (en) 1994-06-30
US5487208A (en) 1996-01-30
DE59303575D1 (en) 1996-10-02

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