EP0286584B1 - Operating process for the weft storage device of a loom - Google Patents

Operating process for the weft storage device of a loom Download PDF

Info

Publication number
EP0286584B1
EP0286584B1 EP88810149A EP88810149A EP0286584B1 EP 0286584 B1 EP0286584 B1 EP 0286584B1 EP 88810149 A EP88810149 A EP 88810149A EP 88810149 A EP88810149 A EP 88810149A EP 0286584 B1 EP0286584 B1 EP 0286584B1
Authority
EP
European Patent Office
Prior art keywords
accumulator
control
control device
drum
weft thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88810149A
Other languages
German (de)
French (fr)
Other versions
EP0286584A1 (en
Inventor
Martinus Dekker
Hubertus Pieter Emannuel Achten
Lodewijk Joanus Hendrikus Cornelis Heinemans
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0286584A1 publication Critical patent/EP0286584A1/en
Application granted granted Critical
Publication of EP0286584B1 publication Critical patent/EP0286584B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/367—Monitoring yarn quantity on the drum
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/362—Drum-type weft feeding devices with yarn retaining devices, e.g. stopping pins
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/362—Drum-type weft feeding devices with yarn retaining devices, e.g. stopping pins
    • D03D47/363—Construction or control of the yarn retaining devices
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/364—Yarn braking means acting on the drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/30—Control systems architecture or components, e.g. electronic or pneumatic modules; Details thereof
    • B65H2557/33—Control systems architecture or components, e.g. electronic or pneumatic modules; Details thereof for digital control, e.g. for generating, counting or comparing pulses

Definitions

  • the invention relates to a method for operating a weft thread store of a weaving machine, with a stationary drum and a control device for the weft thread wound around the drum, the control device having at least two sensors.
  • Such a weft store is described in Swiss Patent No. 647,999. It explains a detection device for the thread to be wound onto the drum and at least one further one for the weft thread to be pulled off the drum. After the second detection device has reported a certain number of signals as a result of the passing weft thread to the control of the weft thread store, a blocking device is switched on, which prevents further thread turns from being pulled off the drum of the weft thread store. The accuracy of the length dimension of the weft thread to be inserted into the weaving machine depends on the function of the second detection device.
  • the signals of the sensors of the control device are compared by an evaluation unit and are only taken into account for the control of the weft thread store and the weaving machine if the chronological sequence of the signals corresponds to at least one expectation model.
  • the absence of a single expected signal from a sensor of the control device is only taken into account if the absence of a corresponding signal from at least one second sensor is also determined by the evaluation unit.
  • a surplus signal that is not expected from a sensor for example as a result of a dirt particle in the sensitive area of the sensor, is not taken into account for the control if it occurs only occasionally and is not detected by at least a second sensor. In this way, interference in the area of the control device, be it in the area of the sensors or to keep away from the control of the weft store and the weaving machine within the control device.
  • the weft thread 10 to be processed in the weaving machine 30 is drawn off from a yarn bobbin 100 by the weft thread store 1, in that a winder 12 winds the weft thread in a plurality of turns on a stationary drum 11, whereupon the weft thread 10 through the control device 19 and the blowing nozzle 33 into the through the warp threads 31 and 32 of the weaving machine 30 formed shed is entered.
  • the weft thread enters the weft thread store 1 through the funnel 172 of the winder shaft 17 and then passes through the winder 12 fastened in the winder shaft is formed from the eyelets 121 and 122 and the intermediate tube 120.
  • a rod 173 is located diametrically opposite the winder as a mass balance.
  • the winder shaft 17 is mounted in the bearings 171 in the housing 15 and is driven by a controlled electric motor 13 via the belt drive 140, 141 and 142.
  • the drum 11 of the weft thread store is mounted on the winder shaft by means of the radial bearing 18. It is prevented from rotating by magnet pairs 16, one of which is located in the housing 15 and another in the drum 11.
  • the drum shell 113 of the drum extends only partially over the circumference of the drum.
  • the drum is formed by brackets 110, the bent ends of which converge radially at flange 111.
  • the flange 111 serves to hold the stirrups 110 in place and enables radial adjustment of the stirrups so that the drum circumference can be changed in accordance with the weft thread length required in the weaving machine 30.
  • the weft thread After the weft thread has been deposited on the conical section 115 of the drum 11, the weft thread turns slide further to the right in FIG. 2 onto the cylindrical section of the drum 11, in order then to be withdrawn discontinuously.
  • the start and end of the removal process are controlled by the locking pin 21, which can be moved radially against the stop 22 in the drum 11 by the electromagnet 20.
  • the magnet 20 has a connection piece 23 for compressed air, which is used for cooling and damping the magnet armature.
  • the cap 112 engages, which forms a narrow annular gap with the drum for braking the thread turns running out of the accumulator.
  • the control device 19 is fastened to the cap 112 by means of the bolts 114 and is essentially formed from the control ring 190, the transmitter 191 and the receiver 192.
  • the control ring 190 is made of transparent material, for example plexiglass.
  • the balloon of the running weft is limited on its conical inside.
  • the trailing edge of the control ring 190 is protected by the wear ring 193, which is made of hardened steel or ceramic, for example.
  • the transmitter 191 and 191 ' forms a light barrier with the receiver 192.
  • Transmitter 191 and receiver 192 are each surrounded by a jacket 194. Since the beam path 195 or 195 'according to FIG. 4 is broken at the transition of the beams into the interior of the control ring 190 or out of the control ring, transmitter 191 and receiver 192 must be arranged in accordance with the angles of refraction of the beams.
  • the beam paths 195 and 195 'according to FIG. 4 are briefly interrupted by the weft thread 10 running from the drum 11, whereupon signals are given to the amplifiers A and B.
  • the temporal sequence of the signals is compared in the evaluation unit W according to FIG. 4 with an expected model.
  • the expected model of the signal sequence in the case of a double arrangement of transmitters 191 and receivers 192 is shown in FIG. 5a.
  • the evaluation unit W forwards a signal to the controller SS for the magnet 20 when a certain number of regular pulses has been registered in the evaluation unit W.
  • the locking pin 21 is pressed against the stop 22 by means of the magnet 20, whereby the Pull-off process of the thread 10 comes to a standstill from the drum 11.
  • the control signals in an embodiment of the control device according to FIG. 4 are alternately generated by the receivers 192 and 192 ', the control device 19 is able to detect interference signals and from an effective disruption of the yarn path, for example as a result of tearing off To distinguish weft.
  • the non-hatched rectangle is intended to represent an interference signal for the amplifier A, which is generated, for example, by a dirt particle crossing the beam path 195 '. Since the other expected signals from the receivers 192 or 192 'arrive according to the program, the evaluation unit W does not detect a fault in the weft thread 10 in this case and consequently suppresses the interference signal.
  • FIG. 5c Another possible interference in the signal processing is shown in FIG. 5c.
  • the dashed, non-hatched rectangle is intended to show that an expected signal does not arrive in amplifier B. This disturbance can exist if a thin spot in the weft yarn crosses the beam path 195 and only leads to an insignificant weakening of the radiation, which is not recognized as an interruption of the beam path.
  • FIG. 8c which is indicated by several expected non-arriving signals and leads to the immediate shutdown of the weaving machine and the weft thread store via the control S.
  • Fig. 1 the control of the electric motor 13 for the winder 12 of the weft thread is shown.
  • the electric motor 13 has the task of driving the winder 12 via the belt drive 14 in such a way that the number of thread windings drawn off the drum 13 is immediately replaced by new ones Winding weft threads are replaced by the bobbin 100 so that there are always enough thread windings on the drum 11.
  • the evaluation unit W continuously reports the number of effectively drawn thread turns to the comparator V, which on the other hand registers the number of new thread turns for the electric motor via the sensor 125 or in response from the control SE for the electric motor.
  • the difference value between newly placed thread turns and drawn thread turns is transmitted from the comparator to the controller R, which compares the difference value from the comparator V with the target value from the input device SW and, depending on the result, issues control commands to the control SE of the electric motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Description

Die Erfindung betrifft ein Verfahren für den Betrieb eines Schussfadenspeichers einer Webmaschine, mit einer stillstehenden Trommel und einer Kontrollvorrichtung für den sich um die Trommel schlingenden Schussfaden, wobei die Kontrollvorrichtung mindestens zwei Sensoren aufweist.The invention relates to a method for operating a weft thread store of a weaving machine, with a stationary drum and a control device for the weft thread wound around the drum, the control device having at least two sensors.

Ein derartiger Schussfadenspeicher ist in der schweizerischen Patentschrift Nr. 647 999 beschrieben. Darin wird eine Detektionseinrichtung für den auf die Trommel aufzuwickelnden Faden und mindestens eine weitere für den von der Trommel abzuziehenden Schussfaden erläutert. Nachdem die zweite Detektionseinrichtung eine bestimmte Anzahl Signale infolge des vorbeilaufenden Schussfadens an die Steuerung des Schussfadenspeichers gemeldet hat, wird eine Sperrvorrichtung eingeschaltet, die das Abziehen weiterer Fadenwindungen von der Trommel des Schussfadenspeichers verhindert. Die Genauigkeit der Längenabmessung des in die Webmaschine einzutragenden Schussfadens hängt von der Funktion der zweiten Detektionseinrichtung ab. Werden von der Detektionseinrichtung im Verhältnis zur Anzahl von Vorbeiläufen des Schussfadens an der Einrichtung zu viele oder zu wenige Signale an die Steuerung gesendet, führt dies dazu, dass der Schussfaden in der Webmaschine entweder zu kurz oder zu lang wird. In beiden Fällen muss durch eine andere Detektionseinrichtung auf der Fangseite der Webmaschine dieser Fehler festgestellt werden, um durch das Betriebspersonal nach Stillsetzung der Webmaschine behoben zu werden. Solche Betriebsunterbrechungen in der Weberei aufgrund von Funktionsstörungen der Ueberwachungsorgane werden nicht toleriert.Such a weft store is described in Swiss Patent No. 647,999. It explains a detection device for the thread to be wound onto the drum and at least one further one for the weft thread to be pulled off the drum. After the second detection device has reported a certain number of signals as a result of the passing weft thread to the control of the weft thread store, a blocking device is switched on, which prevents further thread turns from being pulled off the drum of the weft thread store. The accuracy of the length dimension of the weft thread to be inserted into the weaving machine depends on the function of the second detection device. Are the detection device in If too many or too few signals are sent to the control in relation to the number of passes of the weft thread at the device, this leads to the weft thread being either too short or too long in the weaving machine. In both cases, this error must be determined by another detection device on the catching side of the weaving machine in order to be remedied by the operating personnel after the weaving machine has been shut down. Such interruptions in operation in the weaving mill due to malfunctions in the monitoring organs are not tolerated.

Es ist Aufgabe der vorliegenden Erfindung, eine Kontrollvorrichtung zu schaffen, die betriebsinterne Fehlfunktionen erkennt und unterdrückt.It is an object of the present invention to provide a control device which detects and suppresses internal malfunctions.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass die Signale der Sensoren der Kontrollvorrichtung durch eine Auswerteeinheit verglichen werden, und nur dann für die Steuerung des Schussfadenspeichers und der Webmaschine berücksichtigt werden, wenn die zeitliche Folge der Signale mindestens einem Erwartungsmodell entspricht. Das Ausbleiben eines einzelnen erwarteten Signals eines Sensors der Kontrollvorrichtung wird nur dann berücksichtigt, wenn das Ausbleiben eines entsprechenden Signals mindestens eines zweiten Sensors ebenfalls durch die Auswerteeinheit festgestellt wird. Ebenso wird ein überzähliges nicht erwartetes Signal von einem Sensor, beispielsweise infolge eines Schmutzpartikels im empfindlichen Bereich des Sensors, für die Steuerung nicht berücksichtigt, wenn es nur vereinzelt auftritt und nicht durch mindestens einen zweiten Sensor festgestellt wird. Auf diese Weise gelingt es, Störeinflüsse im Bereich der Kontrollvorrichtung, sei es im Bereich der Sensoren oder innerhalb der Kontrollvorrichtung, von der Steuerung des Schussfadenspeichers und der Webmaschine fernzuhalten.This object is achieved according to the invention in that the signals of the sensors of the control device are compared by an evaluation unit and are only taken into account for the control of the weft thread store and the weaving machine if the chronological sequence of the signals corresponds to at least one expectation model. The absence of a single expected signal from a sensor of the control device is only taken into account if the absence of a corresponding signal from at least one second sensor is also determined by the evaluation unit. Likewise, a surplus signal that is not expected from a sensor, for example as a result of a dirt particle in the sensitive area of the sensor, is not taken into account for the control if it occurs only occasionally and is not detected by at least a second sensor. In this way, interference in the area of the control device, be it in the area of the sensors or to keep away from the control of the weft store and the weaving machine within the control device.

Im folgenden wird die Erfindung anhand der Zeichnungen im einzelnen beschrieben.The invention is described in detail below with reference to the drawings.

Es zeigen:

  • Fig. 1 eine schematische Uebersicht über einen Schussfadenspeicher für eine Webmaschine gemäss der Erfindung,
  • Fig. 2 einen Meridianschnitt durch den Schussfadenspeicher,
  • Fig. 3, 4 Teilschnitte des Schussfadenspeichers bzw. der Kontrolleinrichtung,
  • Fig. 5a-5d mögliche Signalabfolgen von Sensoren der Kontrolleinrichtung,
  • Fig. 6, 7 Teilschnitte des Schussfadenspeichers bzw. der Kontrolleinrichtung mit einer anderen Ausführung der Sensoren,
  • Fig. 8a-8d mögliche Signalabfolgen der Kontrolleinrichtung nach Fig. 7.
Show it:
  • 1 shows a schematic overview of a weft thread store for a weaving machine according to the invention,
  • 2 shows a meridian section through the weft store,
  • 3, 4 partial sections of the weft thread store or the control device,
  • 5a-5d possible signal sequences of sensors of the control device,
  • 6, 7 partial sections of the weft thread store or the control device with a different embodiment of the sensors,
  • 8a-8d possible signal sequences of the control device according to FIG. 7.

Der in der Webmaschine 30 zu verarbeitende Schussfaden 10 wird durch den Schussfadenspeicher 1 von einer Garnspule 100 abgezogen, indem ein Wickler 12 den Schussfaden auf einer stillstehenden Trommel 11 in mehreren Windungen aufwickelt, worauf der Schussfaden 10 durch die Kontrollvorrichtung 19 und die Blasdüse 33 in das durch die Kettfäden 31 und 32 der Webmaschine 30 gebildete Webfach eingetragen wird.The weft thread 10 to be processed in the weaving machine 30 is drawn off from a yarn bobbin 100 by the weft thread store 1, in that a winder 12 winds the weft thread in a plurality of turns on a stationary drum 11, whereupon the weft thread 10 through the control device 19 and the blowing nozzle 33 into the through the warp threads 31 and 32 of the weaving machine 30 formed shed is entered.

Der Schussfaden tritt durch den Trichter 172 der Wicklerwelle 17 in den Schussfadenspeicher 1 ein und durchläuft dann den in der Wicklerwelle befestigten Wickler 12, der aus den Oesen 121 und 122 und dem dazwischenliegenden Rohr 120 gebildet wird. Diametral gegenüber des Wicklers befindet sich ein Stab 173 als Massenausgleich. Die Wicklerwelle 17 ist in den Lagern 171 im Gehäuse 15 gelagert und wird über den Riementrieb 140, 141 und 142 von einem gesteuerten Elektromotor 13 angetrieben. Auf der Wicklerwelle ist die Trommel 11 des Schussfadenspeichers mittels der Radiallager 18 gelagert. Sie wird durch Magnetpaare 16, von welchen je einer im Gehäuse 15 und ein anderer in der Trommel 11 sitzt, am Mitdrehen gehindert. Der Trommelmantel 113 der Trommel erstreckt sich nur teilweise über den Umfang der Trommel. Im übrigen wird die Trommel durch Bügel 110 gebildet, deren abgebogene Enden beim Flansch 111 radial zusammenlaufen. Der Flansch 111 dient zum Festhalten der Bügel 110 und ermöglicht eine radiale Verstellung der Bügel, so dass der Trommelumfang entsprechend der in der Webmaschine 30 geforderten Schussfadenlänge verändert werden kann. Nach der Ablage des Schussfadens auf der konischen Partie 115 der Trommel 11 rutschen die Schussfadenwindungen weiter nach rechts in Fig. 2 auf die zylindrische Partie der Trommel 11, um dann diskontinuierlich abgezogen zu werden. Beginn und Ende des Abziehvorganges werden durch den Sperrstift 21 kontrolliert, welcher durch den Elektromagnet 20 radial gegen den Anschlag 22 in der Trommel 11 bewegt werden kann. Der Magnet 20 weist einen Anschlusstutzen 23 für Pressluft auf, welche zur Kühlung und Dämpfung des Magnetankers dient. Um das abzugsseitige Ende der Trommel 11 greift die Kappe 112, welche mit der Trommel einen schmalen Ringspalt zur Abbremsung der vom Speicher ablaufenden Fadenwindungen bildet. An der Kappe 112 ist mittels der Bolzen 114 die Kontrollvorrichtung 19 befestigt, welche im wesentlichen aus dem Kontrollring 190, dem Sender 191 und dem Empfänger 192 gebildet wird. Der Kontrollring 190 besteht aus durchsichtigem Material, beispielsweise Plexiglas. An seiner konischen Innenseite wird der Ballon des ablaufenden Schussfadens begrenzt. Die Austrittskante des Kontrollrings 190 wird durch den Verschleissring 193 geschützt, der beispielsweise aus gehärtetem Stahl oder Keramik besteht.The weft thread enters the weft thread store 1 through the funnel 172 of the winder shaft 17 and then passes through the winder 12 fastened in the winder shaft is formed from the eyelets 121 and 122 and the intermediate tube 120. A rod 173 is located diametrically opposite the winder as a mass balance. The winder shaft 17 is mounted in the bearings 171 in the housing 15 and is driven by a controlled electric motor 13 via the belt drive 140, 141 and 142. The drum 11 of the weft thread store is mounted on the winder shaft by means of the radial bearing 18. It is prevented from rotating by magnet pairs 16, one of which is located in the housing 15 and another in the drum 11. The drum shell 113 of the drum extends only partially over the circumference of the drum. Otherwise, the drum is formed by brackets 110, the bent ends of which converge radially at flange 111. The flange 111 serves to hold the stirrups 110 in place and enables radial adjustment of the stirrups so that the drum circumference can be changed in accordance with the weft thread length required in the weaving machine 30. After the weft thread has been deposited on the conical section 115 of the drum 11, the weft thread turns slide further to the right in FIG. 2 onto the cylindrical section of the drum 11, in order then to be withdrawn discontinuously. The start and end of the removal process are controlled by the locking pin 21, which can be moved radially against the stop 22 in the drum 11 by the electromagnet 20. The magnet 20 has a connection piece 23 for compressed air, which is used for cooling and damping the magnet armature. Around the end of the drum 11 on the take-off side, the cap 112 engages, which forms a narrow annular gap with the drum for braking the thread turns running out of the accumulator. The control device 19 is fastened to the cap 112 by means of the bolts 114 and is essentially formed from the control ring 190, the transmitter 191 and the receiver 192. The control ring 190 is made of transparent material, for example plexiglass. The balloon of the running weft is limited on its conical inside. The trailing edge of the control ring 190 is protected by the wear ring 193, which is made of hardened steel or ceramic, for example.

Der Sender 191 bzw. 191′ bildet mit dem Empfänger 192 eine Lichtschranke. Sender 191 und Empfänger 192 sind jeweils von einem Mantel 194 umgeben. Da der Strahlengang 195 bzw. 195′ nach Fig. 4 beim Uebergang der Strahlen in das Innere des Kontrollringes 190 bzw. aus dem Kontrollring heraus gebrochen wird, müssen Sender 191 und Empfänger 192 entsprechend den Brechungswinkeln der Strahlen angeordnet sein.The transmitter 191 and 191 'forms a light barrier with the receiver 192. Transmitter 191 and receiver 192 are each surrounded by a jacket 194. Since the beam path 195 or 195 'according to FIG. 4 is broken at the transition of the beams into the interior of the control ring 190 or out of the control ring, transmitter 191 and receiver 192 must be arranged in accordance with the angles of refraction of the beams.

Durch den von der Trommel 11 laufenden Schussfaden 10 werden die Strahlengänge 195 bzw. 195′ nach Fig. 4 kurzzeitig unterbrochen, worauf Signale an die Verstärker A bzw. B gegeben werden. Die zeitliche Folge der Signale wird in der Auswerteeinheit W nach Fig. 4 mit einem erwarteten Modell verglichen. Das erwartete Modell der Signalfolge für den Fall einer doppelten Anordnung von Sendern 191 und Empfängern 192 ist in Fig. 5a dargestellt. Bei jedem Umlauf des Schussfadens im Kontrollring 190 wird der Strahlengang 195 bzw. 195′ zweimal unterbrochen, was zur Bildung und Weiterleitung von jeweils zwei Rechteckimpulsen in zeitlicher Folge an der Auswerteeinheit W führt. Bei störungsfreiem Betrieb der Kontrollvorrichtung gibt die Auswerteeinheit W ein Signal an die Steuerung SS für den Magnet 20 weiter, wenn eine bestimmte Anzahl regelmässiger Impulse in der Auswerteeinheit W registriert worden ist. Nachdem die gewünschte Anzahl von Fadenwindungen von der Trommel 11 des Schussfadenspeichers abgezogen ist, wird der Sperrstift 21 mittels des Magnets 20 gegen den Anschlag 22 gepresst, wodurch der Abzugsvorgang des Fadens 10 von der Trommel 11 zum Stillstand kommt. Dadurch, dass die Kontrollsignale in einer Ausführung der Kontrollvorrichtung gemäss Fig. 4 jeweils abwechselnd durch die Empfänger 192 bzw. 192′ erzeugt werden, ist die Kontrollvorrichtung 19 in der Lage, Störsignale zu erkennen und von einer effektiven Störung des Fadenlaufs, beispielsweise infolge Abreissens des Schussfadens, zu unterscheiden. In Fig. 5b soll das nicht schraffierte Rechteck ein Störsignal für den Verstärker A darstellen, welches beispielsweise durch ein den Strahlengang 195′ kreuzendes Schmutzteilchen erzeugt wird. Da die übrigen erwarteten Signale von den Empfängern 192 bzw. 192′ programmgemäss eintreffen, erkennt die Auswerteeinheit W in diesem Fall nicht auf eine Störung im Ablauf des Schussfadens 10 und unterdrückt demzufolge das Störsignal. In Fig. 5c wird eine andere mögliche Störung in der Signalverarbeitung dargestellt. Durch das gestrichelte, nicht schraffierte Rechteck soll dargestellt werden, dass ein erwartetes Signal im Verstärker B nicht eintrifft. Diese Störung kann gegeben sein, wenn eine Dünnstelle im Schussgarn den Strahlengang 195 kreuzt und nur zur einer unbedeutenden Schwächung der Strahlung führt, welche nicht als Unterbrechung des Strahlengangs erkannt wird. Da die weiteren erwarteten Signale dem erwarteten Modell entsprechen, kann damit gerechnet werden, dass der Schussfaden ordnungsgemäss von der Trommel 11 abläuft, weshalb auch in diesem Fall die Auswerteeinheit W keine Störungsmeldung an die Steuerung S des Schussfadenspeichers gibt. Fig. 5d zeigt schliesslich die Signalfolge bei einem Schussfadenbruch während des Schuseintrages in die Webmaschine, welcher bewirkt, dass der Abzug des Schussfadens von der Trommel 11 des Schussfadenspeichers 1 verfrüht endet, worauf die erwarteten Signale entsprechend den gestrichelten nicht schraffierten Rechtecken in Fig. 5d nicht mehr in der Auswerteeinheit W ankommen, was die Auswerteeinheit W zur Abgabe eines Alarmsignals an die Steuerung S des Schussfadenspeichers veranlasst. Darauf wird die Webmaschine, deren Steuerung mit der Steuerung S des Schussfadenspeichers gekoppelt ist, stillgesetzt, damit der Schussfadenbruch behoben werden kann.The beam paths 195 and 195 'according to FIG. 4 are briefly interrupted by the weft thread 10 running from the drum 11, whereupon signals are given to the amplifiers A and B. The temporal sequence of the signals is compared in the evaluation unit W according to FIG. 4 with an expected model. The expected model of the signal sequence in the case of a double arrangement of transmitters 191 and receivers 192 is shown in FIG. 5a. With each revolution of the weft thread in the control ring 190, the beam path 195 or 195 'is interrupted twice, which leads to the formation and transmission of two square-wave pulses in time sequence at the evaluation unit W. When the control device operates fault-free, the evaluation unit W forwards a signal to the controller SS for the magnet 20 when a certain number of regular pulses has been registered in the evaluation unit W. After the desired number of thread turns has been withdrawn from the drum 11 of the weft thread store, the locking pin 21 is pressed against the stop 22 by means of the magnet 20, whereby the Pull-off process of the thread 10 comes to a standstill from the drum 11. Due to the fact that the control signals in an embodiment of the control device according to FIG. 4 are alternately generated by the receivers 192 and 192 ', the control device 19 is able to detect interference signals and from an effective disruption of the yarn path, for example as a result of tearing off To distinguish weft. In Fig. 5b, the non-hatched rectangle is intended to represent an interference signal for the amplifier A, which is generated, for example, by a dirt particle crossing the beam path 195 '. Since the other expected signals from the receivers 192 or 192 'arrive according to the program, the evaluation unit W does not detect a fault in the weft thread 10 in this case and consequently suppresses the interference signal. Another possible interference in the signal processing is shown in FIG. 5c. The dashed, non-hatched rectangle is intended to show that an expected signal does not arrive in amplifier B. This disturbance can exist if a thin spot in the weft yarn crosses the beam path 195 and only leads to an insignificant weakening of the radiation, which is not recognized as an interruption of the beam path. Since the other expected signals correspond to the expected model, it can be expected that the weft thread will run off the drum 11 properly, which is why in this case the evaluation unit W does not report a fault to the control unit S of the weft thread store. 5d finally shows the signal sequence in the event of a weft thread break during the weft insertion into the weaving machine, which causes the weft thread withdrawal from the drum 11 of the weft thread store 1 to end prematurely, whereupon the expected signals corresponding to the dashed, non-hatched rectangles in FIG. 5d do not more in the Evaluation unit W arrive, which causes evaluation unit W to emit an alarm signal to controller S of the weft thread store. The weaving machine, the control of which is coupled to the control S of the weft thread store, is then stopped so that the weft thread break can be remedied.

In den Fig. 6, 7 und 8 ist eine andere Ausführungsart eines Schussfadenspeichers gemäss der Erfindung dargestellt. Der Lichtstrahl des Senders 191 bzw. 191′ wird durch einen Reflektorkegel 24 nach Fig. 6,7 zu einem unmittelbar neben dem Sender liegenden Empfänger 192 bzw. 192′ reflektiert. Bei dieser Ausführungsart des Kontrollringes wird beim Abzug des Schussfadens von der Trommel 11 des Schussfadenspeichers 1 jeweils nur ein Signal abwechselnd in den Verstärkern A und B empfangen. Auch hier kann ein fälschlich registriertes Signal entsprechend nicht schraffiertem Rechteck in Fig. 8b beispielsweise infolge Faserfluges von der Auswerteeinheit W erkannt und unterdrückt werden. Auch ein nicht empfangenes erwartetes Signal entsprechend dem gestrichelten nicht schraffierten Rechteck in Fig. 8c führt zu keiner Störungsmeldung an die Steuerung des Schussfadenspeichers S durch die Auswerteeinheit W, da die folgenden erwarteten Signale eintreffen. Der Fall des Fadenbruches wird in Fig. 8d dargestellt, der durch mehrere erwartete nicht eintreffende Signale angezeigt wird und zum sofortigen Abschalten der Webmaschine und des Schussfadenspeichers über die Steuerung S führt.6, 7 and 8, another embodiment of a weft store according to the invention is shown. The light beam from the transmitter 191 or 191 'is reflected by a reflector cone 24 according to Fig. 6.7 to a receiver 192 or 192' located directly next to the transmitter. In this embodiment of the control ring, only one signal is received alternately in the amplifiers A and B when the weft thread is withdrawn from the drum 11 of the weft thread store 1. Here too, an incorrectly registered signal corresponding to the non-hatched rectangle in FIG. 8b can be recognized and suppressed by the evaluation unit W, for example as a result of fiber flight. Even an expected signal not received corresponding to the dashed, non-hatched rectangle in FIG. 8c does not result in a fault message to the control of the weft thread store S by the evaluation unit W, since the following expected signals arrive. The case of thread breakage is shown in FIG. 8d, which is indicated by several expected non-arriving signals and leads to the immediate shutdown of the weaving machine and the weft thread store via the control S.

In Fig. 1 ist die Steuerung des Elektromotors 13 für den Wickler 12 des Schussfadens dargestellt. Der Elektromotor 13 hat die Aufgabe, den Wickler 12 über den Riementrieb 14 so anzutreiben, dass die von der Trommel 13 abgezogene Anzahl von Fadenwicklungen umgehend durch neues Aufwickeln von Schussfaden von der Spule 100 ersetzt werden, damit immer genügend Fadenwindungen auf der Trommel 11 vorrätig sind. Von der Auswerteeinheit W wird laufend die Anzahl der effektiv abgezogenen Fadenwindungen an den Vergleicher V gemeldet, welcher andererseits über den Sensor 125 bzw. in Rückmeldung von der Steuerung SE für den Elektromotor die Anzahl neu aufgelegter Fadenwindungen registriert. Der Differenzwert zwischen neu aufgelegten Fadenwindungen und abgezogenen Fadenwindungen wird vom Vergleicher an den Regler R übermittelt, der den Differenzwert vom Vergleicher V mit dem Sollwert vom Eingabegerät SW vergleicht und je nach Ergebnis Steuerbefehle an die Steuerung SE des Elektromotors abgibt.In Fig. 1, the control of the electric motor 13 for the winder 12 of the weft thread is shown. The electric motor 13 has the task of driving the winder 12 via the belt drive 14 in such a way that the number of thread windings drawn off the drum 13 is immediately replaced by new ones Winding weft threads are replaced by the bobbin 100 so that there are always enough thread windings on the drum 11. The evaluation unit W continuously reports the number of effectively drawn thread turns to the comparator V, which on the other hand registers the number of new thread turns for the electric motor via the sensor 125 or in response from the control SE for the electric motor. The difference value between newly placed thread turns and drawn thread turns is transmitted from the comparator to the controller R, which compares the difference value from the comparator V with the target value from the input device SW and, depending on the result, issues control commands to the control SE of the electric motor.

Claims (4)

1. A method of operating a weft accumulator (1) of a loom, the accumulator comprising a stationary drum (11) and a control device (19) for a weft yarn (10) which wraps around the drum and can be drawn off therefrom, the control device (19) having at least two sensors (191, 192 and 191′, 192′ respectively), each of which responds during the drawing-off step to each passage of the weft yarn by outputting a signal transmissible to control means of the accumulator (1), characterised in that the signals of the sensors (191, 192 and 191′, 192′ respectively) are supplied to the control device of an evaluator (W) and compared therein with at least one expected model corresponding to a predetermined sequence in time of these signals in disturbance-free operation of the accumulator, and the delivered signals are taken into consideration for the control (S) of the accumulator (1) and loom (30) only when the sequence in time of the delivered signals corresponds to the expected model.
2. A method according to claim 1, characterised in that absence of a single expected signal of a sensor (191, 192) of the control device (19) is taken into consideration only when the absence of a corresponding signal of at least one second sensor (191′, 192′) is also detected by the evaluator (W).
3. A method according to claim 1, characterised in that an overdigited unexpected signal caused, for example, by a dirt particle in the sensitive zone of the sensor, is not taken into consideration for the control (S) of the accumulator if it occurs only once and is not detected by at least one second sensor (191′, 192′).
4. A control device for a weft yarn accumulator for the performance of the method according to claim 1 and having at least the sensors (191, 192 and 191′, 192′) disposed at the accumulator (1), characterised in that the sensors (191, 192 and 191′, 192′) are connected by way of an evaluator (W) to tie control (S) of the accumulator (1).
EP88810149A 1987-04-08 1988-03-09 Operating process for the weft storage device of a loom Expired - Lifetime EP0286584B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH134987 1987-04-08
CH1349/87 1987-04-08

Publications (2)

Publication Number Publication Date
EP0286584A1 EP0286584A1 (en) 1988-10-12
EP0286584B1 true EP0286584B1 (en) 1991-05-08

Family

ID=4208398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810149A Expired - Lifetime EP0286584B1 (en) 1987-04-08 1988-03-09 Operating process for the weft storage device of a loom

Country Status (4)

Country Link
US (1) US4848417A (en)
EP (1) EP0286584B1 (en)
JP (1) JPS63270839A (en)
DE (1) DE3862670D1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE58907253D1 (en) * 1988-12-07 1994-04-21 Iro Ab OPTOELECTRONIC SENSING DEVICE.
EP0498852B1 (en) * 1989-11-03 1995-01-04 Iro Ab Process for preventing torsional vibrations in a thread-storage and thread-feed device, and thread-storage and thread-feed device
NL9101312A (en) * 1991-07-31 1993-02-16 Rueti APPARATUS FOR FORMING A STOCK WRAP FROM A WIRE SUPPLIED FROM A YARN STOCK.
NL9201344A (en) * 1992-07-24 1994-02-16 Rueti Device for feeding a periodically operating yarn-processing device.
BE1009172A3 (en) * 1995-02-28 1996-12-03 Picanol Nv Gripper loom with shock detection apparatus
DE19526216A1 (en) * 1995-07-18 1997-01-23 Iro Ab Method for scanning a thread and thread take-off sensor
DE19915349A1 (en) * 1999-04-06 2000-10-19 Dornier Gmbh Lindauer Method for avoiding braking deceleration during a weaving stop in a weaving machine
IT1307712B1 (en) * 1999-04-27 2001-11-14 Lgl Electronics Spa SURVEILLANCE METHOD OF WEFT INSERTION IN FEEDING SYSTEMS OF FLUID JET FRAMES WITH YARN PRE-MEASURER
NL1014729C2 (en) * 2000-03-23 2001-09-25 Te Strake Bv A method for recording and counting windings winding from a drum, as well as a device for carrying out this method.
ITTO20020029U1 (en) * 2002-02-08 2003-08-08 L G L Electronics Spa ,, WEFT FEEDER DEVICE FOR TEXTILE MACHINES WITH FIXING SYSTEM OF THE DRUM FIXED TO THE PERFECTED MOTOR BODY ,,
JP5821646B2 (en) * 2012-01-17 2015-11-24 株式会社豊田自動織機 Weft breakage detection device for fluid jet loom that wefts multiple wefts simultaneously

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH647999A5 (en) * 1980-06-17 1985-02-28 Rueti Ag Maschf THREAD DELIVERY DEVICE FOR TEXTILE MACHINES AND METHOD FOR OPERATING THE THREAD DELIVERY DEVICE.
JPS59500975A (en) * 1982-05-12 1984-05-31 アクテイエボラゲツト　イロ loom control system
US4546263A (en) * 1982-12-06 1985-10-08 Nissan Motor Company, Limited Weft sensor for a loom
JPS59106543A (en) * 1982-12-13 1984-06-20 日産自動車株式会社 Weft yarn feeder of segment loom
JPS59187647A (en) * 1983-04-01 1984-10-24 津田駒工業株式会社 Weft yarn defect detecting and stopping apparatus of loom
JPS60162838A (en) * 1984-01-27 1985-08-24 株式会社豊田自動織機製作所 Wefting method in fluid jet type loom
US4614311A (en) * 1985-01-30 1986-09-30 Kasuga Denki Co., Ltd. Yarn storage and delivery apparatus
JPH0733614B2 (en) * 1985-04-05 1995-04-12 津田駒工業株式会社 Horizontal insertion control method and apparatus
JPH0749612B2 (en) * 1986-01-22 1995-05-31 津田駒工業株式会社 Weft unwinding detection device of drum type weft measuring and storing device

Also Published As

Publication number Publication date
DE3862670D1 (en) 1991-06-13
EP0286584A1 (en) 1988-10-12
JPS63270839A (en) 1988-11-08
US4848417A (en) 1989-07-18

Similar Documents

Publication Publication Date Title
EP0286590B1 (en) Weft yarn storage device for a loom
EP0286584B1 (en) Operating process for the weft storage device of a loom
DE2111671C3 (en) Thread storage device for textile machines
EP3802927B1 (en) Ring-spinning line and process thereof
DE68902750T2 (en) YARN DELIVERY DEVICE FOR TEXTILE MACHINES.
EP0530492A1 (en) Method for detecting flaws in a textile web
DE2262425A1 (en) DEVICE FOR THE AUTOMATIC MONITORING AND CONTROL OF A MACHINE SPOILING A NUMBER OF SPOOLS WITH A YARN THREAD
DE3213631C2 (en) Control device for a winding unit of an automatic winder
CH667886A5 (en) METHOD AND DEVICE FOR CONTROLLING A LUNTENSTOP ARRANGEMENT OF A SPINNING MACHINE.
DE3917055C2 (en) Method and device for monitoring the production process of the winding devices of a cross-wound machine
DE60003895T2 (en) METHOD AND DEVICE FOR MONITORING YARN
DE2533754A1 (en) METHOD AND DEVICE FOR PROCESSING STRENGTHS
EP0016871B1 (en) Method and device for obtaining predetermined and exact yarn lengths on cross spools
CH659460A5 (en) DEVICE FOR DETERMINING DEFECT afflicted WRAP FOR GARNHASPEL.
DE2124288C3 (en) Device for controlling an automatic package winder
EP1440193A1 (en) Yarn processing system
EP0679599A2 (en) Monitoring device for sliver
DE3806165C2 (en) Process for checking the rewinding process in an automatic winder
DE3245574C2 (en) Method for monitoring the texturing process in a friction false twist unit
EP0251268B1 (en) Device for spinning yarns
DE19642222A1 (en) Ring spinner for a cladded yarn
DE60204103T2 (en) Device for detecting play between drafting rollers of a spinning machine
DE2951552A1 (en) Yarn-lap preventer for traverse-drum of winding head - monitors synchronisation of yarn traverse with drum revolutions
DE4039121A1 (en) Running yarn monitor - has voltage divider to set limits for automatic tolerance range adjustment after a start-up
DE3411927C2 (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19880311

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE FR GB IT LI

17Q First examination report despatched

Effective date: 19900301

ITF It: translation for a ep patent filed

Owner name: ING. ZINI MARANESI & C. S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE FR GB IT LI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910508

REF Corresponds to:

Ref document number: 3862670

Country of ref document: DE

Date of ref document: 19910613

EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910927

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920331

Ref country code: CH

Effective date: 19920331

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930213

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930216

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19940331

BERE Be: lapsed

Owner name: GEBRUDER SULZER A.G.

Effective date: 19940331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19941201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050309