EP0290383B1 - Apparatus for releasing a defective weft yarn from the shed of a loom - Google Patents

Apparatus for releasing a defective weft yarn from the shed of a loom Download PDF

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Publication number
EP0290383B1
EP0290383B1 EP88810245A EP88810245A EP0290383B1 EP 0290383 B1 EP0290383 B1 EP 0290383B1 EP 88810245 A EP88810245 A EP 88810245A EP 88810245 A EP88810245 A EP 88810245A EP 0290383 B1 EP0290383 B1 EP 0290383B1
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EP
European Patent Office
Prior art keywords
storage drum
yarn
arrangement according
weft yarn
intermediate storage
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Expired - Lifetime
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EP88810245A
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German (de)
French (fr)
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EP0290383A1 (en
Inventor
Hubertus Henricus Aarts
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Sulzer AG
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Gebrueder Sulzer AG
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Publication of EP0290383A1 publication Critical patent/EP0290383A1/en
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    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085Extraction of defective weft

Definitions

  • the invention relates to an arrangement for removing a defective weft thread from the weaving shed of a weaving machine, comprising a manipulator arranged on one side of the weaving machine for spatially controlling a thread clamp between a rest position and a weft thread detection position, a release device for releasing the weft thread from the stop line of the fabric , and a removal device for the loosened weft thread.
  • the device for releasing the defective weft thread from the stop line consists of a shovel which is moved back and forth across the entire width of the weave by means of a flexible, retractable and extendable strip is moved here.
  • This device is not suitable for large weaving widths.
  • the one-sided end of the loosened weft thread is gripped by a thread clamp controlled by a manipulator and guided in front of the mouth of a suction tube which pulls the weft thread out of the shed and leads it away.
  • the weft thread is subject to a proportionate movement through the shed great friction, so that reliable, but especially economical, extraction of the weft thread with regard to air consumption is not possible for all weft yarns.
  • the invention has for its object to provide an arrangement of the type defined, wherein the release device only has to expose the weft end and no suction air is used during the removal of the weft from the shed.
  • This object is achieved according to the invention in that an intermediate storage drum is additionally provided which can be rotated by means of a drive and has the means for receiving the defective weft thread, that the intermediate storage drum is arranged in the area of action of the thread clamp and that the intermediate storage drum is connected to the mouth of the discharge device is connected that the discharge device can feed the thread to a collection container by suction after the intermediate storage.
  • the arrangement for recovering a defective weft thread has a manipulator 1 for controlling a thread clamp carrier 2.
  • the manipulator 1 is located in a frame 3 which is attached to a machine frame 4.
  • the manipulator 1 has two, e.g. pneumatic servomotors 6 and 7.
  • the servomotor 7 is rotatably mounted about its longitudinal axis in a bore 8 in the frame 3.
  • the rotation of the servomotor 7 is controlled by the servomotor 6, the piston rod 9 of which is connected to a lever arm 10 on the servomotor 7.
  • the free end of a piston rod 11 of the servomotor 7 carries the thread clamp carrier 2.
  • the thread clamp carrier 2 is provided with two mini servomotors 15 and 16 (FIG. 1a).
  • a piston rod 17 of the servomotor 15 is connected by means of a fork 18 to a jaw 19 which is rotatable about a pin 20.
  • the jaw 19 forms a thread clamp 22 with a nose 21.
  • a piston rod 23 of the mini servomotor 16 is provided with a fork 24 in which one end 25 of a lever 26 is rotatably mounted.
  • the other end of the lever 26 is rotatable about a pin 27.
  • This other end of the lever 26 is provided with a clamp 28 in which a hairpin-shaped bent needle 29 is fastened.
  • the needle 29 can be rotated parallel to the plane by means of the mini servomotor 16 in a to the thread clamp 22 and the warp threads 30 and 31 of a shed 32.
  • All servomotors 6, 7, 15 and 16 are connected via control lines shown in broken lines, e.g. the control lines 35 and 36 for the servomotor 7, connected to a programmed control block 37.
  • the manipulator is located on the entry side of the loom opposite the shed 32.
  • the woven cloth is identified by 38, a reed located in the shed by 39.
  • the frame 3 also carries an intermediate storage drum 45 which is driven by an electric motor 46.
  • the storage drum 45 has a catch disc 47 Catch hook 48, which divides the storage drum into two sections 49 and 50 (Fig. 1b).
  • a few axial grooves 52 are provided in the circumference 51 of the storage drum. Where the grooves cross the catch disc, this is provided with a recess 53.
  • the section 50 of the storage drum 45 is surrounded by a sleeve 54 shown in dashed lines to such an extent that a section 55 between the sleeve end 56 and the catching disk 47 remains free and accessible.
  • a suction pipe 60 opens into the sleeve 54, the other end 61 of which ends in a collecting container 62 for weft threads.
  • the suction effect in the suction pipe 60 is generated according to the principle by driving air which is pressed into the suction pipe by a driving pipe 63.
  • a sensor 64 is attached in the suction tube, which, after passing the end of the suction weft thread, generates a signal that the weaving machine is ready for operation again. The signal is fed to the control block 37 via a line 65.
  • the operation of the arrangement is described below with reference to Figures 2-12.
  • the starting point is the position of the arrangement shown in FIGS. 1 and 2 during normal operation of the loom.
  • the mini servomotor 15 opens the thread clamp 22 after winding up a few turns.
  • the mini servomotor 16 rotates the needle 29 back into its starting position.
  • the winding of the weft thread is continued in section 50 to the right of the catch disc 47. It should be noted here that so many turns are required in section 49, approximately 1 1/2, that after opening the thread clamp there is enough friction that the weft thread does not slip when winding up in section 50.
  • a feed mechanism 66 on the storage drum 45 comes into effect according to FIG. 1c.
  • This mechanism essentially consists of a cam drum 57, which is driven to rotate according to arrow 58 in FIG. 1c.
  • the transfer of the weft thread from the surface 44 of the intermediate storage drum 45 to the sleeve 54 can be facilitated in that the intermediate storage drum is set into a rotational movement counter to the direction of rotation when the weft thread is wound up.
  • the control block 37 As soon as the end of the weft 72 has passed the sensor 64 in the suction tube 60, it generates a signal for the control block 37 that the weaving machine is ready for operation again.
  • the control block sends a start signal to the drive control and the weaving machine starts up again.
  • an intermediate storage drum 76 driven by an electric motor 75 has a conical surface 77.
  • the surface 77 is pierced by a driver 79 for the weft thread, which can be moved back and forth by means of a servomotor 78. If the first few turns of the weft thread are wound onto the drum 76 to the left of the driver 79, the servomotor 78 pulls in the driver 79 and this disappears below the surface 77. The winding is then continued to the right of the driver 79.
  • a thread clamp carrier with a third servomotor 85 which actuates a pair of scissors 86.
  • a scissor blade 87 is plate-shaped and rotatable about a pin 88 on the thread clamp carrier 2.
  • the other scissor blade 89 is connected to the servomotor 85.
  • a bow 92 is intended to facilitate the capture of the weft thread. It is attached to the lower scissor blade 89.

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

Description

Die Erfindung betrifft eine Anordnung zum Entfernen eines defekten Schussfadens aus dem Webfach einer Webmaschine, umfassend einen auf einer Seite der Webmaschine angeordneten Manipulator zum räumlichen Steuern einer Fadenklemme zwischen einer Ruhelage und einer Schussfaden-Erfassungslage, einer Lösevorrichtung zum Lösen des Schussfadens von der Anschlaglinie des Gewebes, und eine Abführvorrichtung für den gelösten Schussfaden.The invention relates to an arrangement for removing a defective weft thread from the weaving shed of a weaving machine, comprising a manipulator arranged on one side of the weaving machine for spatially controlling a thread clamp between a rest position and a weft thread detection position, a release device for releasing the weft thread from the stop line of the fabric , and a removal device for the loosened weft thread.

Bei einer bekannten Anordnung nach der DE-OS 33 42 398 (TS 294) besteht die Vorrichtung zum Lösen des defekten Schussfadens von der Anschlaglinie aus einer Schaufel, die mittels eines biegsamen, ein- und ausfahrbaren Streifens über die gesamte Webbreite durch das Webfach hin und her bewegt wird. Diese Vorrichtung eignet sich nicht für grosse Webbreiten. Das einseitige Ende des gelösten Schussfadens wird von einer von einem Manipulator gesteuerten Fadenklemme erfasst und vor die Mündung eines Saugrohres geführt, das den Schussfaden aus dem Webfach zieht und abführt. Der Schussfaden unterliegt bei seiner Bewegung durch das Webfach einer verhältnismässig grossen Reibung, so dass ein zuverlässiges, aber besonders ein wirtschaftliches Ausziehen des Schussfadens hinsichtlich des Luftverbrauchs nicht für alle Schussgarne möglich ist.In a known arrangement according to DE-OS 33 42 398 (TS 294), the device for releasing the defective weft thread from the stop line consists of a shovel which is moved back and forth across the entire width of the weave by means of a flexible, retractable and extendable strip is moved here. This device is not suitable for large weaving widths. The one-sided end of the loosened weft thread is gripped by a thread clamp controlled by a manipulator and guided in front of the mouth of a suction tube which pulls the weft thread out of the shed and leads it away. The weft thread is subject to a proportionate movement through the shed great friction, so that reliable, but especially economical, extraction of the weft thread with regard to air consumption is not possible for all weft yarns.

Der Erfindung liegt die Aufgabe zugrunde, eine Anordnung der eingangs definierten Art zu schaffen, wobei die Lösevorrichtung nur das Schussfadenende freilegen muss und keine Saugluft während des Entfernens des Schussfadens aus dem Webfach verwendet wird. Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass zusätzlich eine Zwischenspeichertrommel vorgesehen ist, die mittels eines Antriebs drehbaren ist und die Mittel für die Aufnahme des defekten Schussfadens aufweist, dass die Zwischenspeichertrommel im Wirkungsbereich der Fadenklemme angeordnet ist und dass die Zwischenspeichertrommel so an die Mündung der Abführvorrichtung angeschlossen ist, dass die Abführvorrichtung den Faden nach der Zwischenspeicherung durch Absaugen einem Sammelbehälter zuführen kann.The invention has for its object to provide an arrangement of the type defined, wherein the release device only has to expose the weft end and no suction air is used during the removal of the weft from the shed. This object is achieved according to the invention in that an intermediate storage drum is additionally provided which can be rotated by means of a drive and has the means for receiving the defective weft thread, that the intermediate storage drum is arranged in the area of action of the thread clamp and that the intermediate storage drum is connected to the mouth of the discharge device is connected that the discharge device can feed the thread to a collection container by suction after the intermediate storage.

Zwei Ausführungsbeispiele des Erfindungsgegenstandes sind nachfolgend anhand der Zeichnungen beschrieben. Es ist:

  • Fig. 1 eine perspektivische Zeichnung der Anordnung gemäss der Erfindung;
  • Fig. 1a eine perspektivische Zeichnung des Fadenklemmenträgers in vergrössertem Massstab;
  • Fig. 1b eine perspektivische Darstellung der Zwischenspeichertrommel;
  • Fig. 1c ein Schnitt durch den Zwischenspeicher mit einem Vorschubmechanismus für den Schussfaden,
  • Fig. 2-12 schematisch dargestellte Bewegungsabläufe zur Erklärung der Arbeitsweise der Anordnung;
  • Fig. 13 ein Detail einer weiteren Ausführung des Fadenklemmenträgers,
  • Fig. 14 zeigt eine Schneidvorrichtung für den Schussfaden, welche am Fadenklemmenträger befestigt ist.
Two exemplary embodiments of the subject matter of the invention are described below with reference to the drawings. It is:
  • Figure 1 is a perspective drawing of the arrangement according to the invention.
  • 1a shows a perspective drawing of the thread clamp carrier on an enlarged scale;
  • 1b is a perspective view of the intermediate storage drum;
  • 1c shows a section through the intermediate store with a feed mechanism for the weft thread,
  • Fig. 2-12 schematically illustrated movements to explain the operation of the arrangement;
  • 13 shows a detail of a further embodiment of the thread clamp carrier,
  • 14 shows a cutting device for the weft thread, which is attached to the thread clamp carrier.

Die Anordnung zum Bergen eines defekten Schussfadens nach Fig. 1 weist einen Manipulator 1 zum Steuern eines Fadenklemmenträgers 2 auf. Der Manipulator 1 befindet sich in einem Rahmen 3, der an einem Maschinengestell 4 befestigt ist. Der Manipulator 1 weist zwei, z.B. pneumatische Stellmotoren 6 und 7 auf. Der Stellmotor 7 ist um seine Längsachse drehbar in einer Bohrung 8 im Rahmen 3 gelagert. Die Drehung des Stellmotors 7 wird gesteuert durch den Stellmotor 6, dessen Kolbenstange 9 dazu mit einem Hebelarm 10 auf dem Stellmotor 7 verbunden ist. Das freie Ende einer Kolbenstange 11 des Stellmotors 7 trägt den Fadenklemmenträger 2. Der Fadenklemmenträger 2 ist mit zwei Mini-Stellmotoren 15 und 16 (Fig. 1a) versehen. Eine Kolbenstange 17 des Stellmotors 15 ist mittels einer Gabel 18 mit einer Backe 19, die um einen Zapfen 20 drehbar ist, verbunden. Die Backe 19 bildet mit einer Nase 21 eine Fadenklemme 22. Eine Kolbenstange 23 des Mini-Stellmotors 16 ist mit einer Gabel 24 versehen, in der ein Ende 25 eines Hebels 26 drehbar gelagert ist. Das andere Ende des Hebels 26 ist um einen Zapfen 27 drehbar. Dieses andere Ende des Hebels 26 ist mit einer Klemme 28 versehen, in der eine haarnadelförmig gebogene Nadel 29 befestigt ist. Die Nadel 29 ist mittels des Mini-Stellmotors 16 in einer zur Fadenklemme 22 und den Kettfäden 30 und 31 eines Webfaches 32 parallel zur Ebene drehbar. Sämtliche Stellmotoren 6, 7, 15 und 16 sind über strichpunktiert gezeichnete Steuerleitungen, z.B. die Steuerleitungen 35 und 36 für den Stellmotor 7, mit einem programmierten Steuerblock 37 verbunden. Der Manipulator befindet sich auf der Eintragsseite der Webmaschine gegenüber dem Webfach 32. Das gewebte Tuch ist mit 38 bezeichnet, ein sich im Webfach befindliches Riet mit 39.The arrangement for recovering a defective weft thread according to FIG. 1 has a manipulator 1 for controlling a thread clamp carrier 2. The manipulator 1 is located in a frame 3 which is attached to a machine frame 4. The manipulator 1 has two, e.g. pneumatic servomotors 6 and 7. The servomotor 7 is rotatably mounted about its longitudinal axis in a bore 8 in the frame 3. The rotation of the servomotor 7 is controlled by the servomotor 6, the piston rod 9 of which is connected to a lever arm 10 on the servomotor 7. The free end of a piston rod 11 of the servomotor 7 carries the thread clamp carrier 2. The thread clamp carrier 2 is provided with two mini servomotors 15 and 16 (FIG. 1a). A piston rod 17 of the servomotor 15 is connected by means of a fork 18 to a jaw 19 which is rotatable about a pin 20. The jaw 19 forms a thread clamp 22 with a nose 21. A piston rod 23 of the mini servomotor 16 is provided with a fork 24 in which one end 25 of a lever 26 is rotatably mounted. The other end of the lever 26 is rotatable about a pin 27. This other end of the lever 26 is provided with a clamp 28 in which a hairpin-shaped bent needle 29 is fastened. The needle 29 can be rotated parallel to the plane by means of the mini servomotor 16 in a to the thread clamp 22 and the warp threads 30 and 31 of a shed 32. All servomotors 6, 7, 15 and 16 are connected via control lines shown in broken lines, e.g. the control lines 35 and 36 for the servomotor 7, connected to a programmed control block 37. The manipulator is located on the entry side of the loom opposite the shed 32. The woven cloth is identified by 38, a reed located in the shed by 39.

Der Rahmen 3 trägt weiterhin eine Zwischenspeichertrommel 45, die von einem Elektromotor 46 angetrieben ist. Die Speichertrommel 45 weist eine Fangscheibe 47 mit Fanghaken 48 auf, die die Speichertrommel in zwei Abschnitte 49 und 50 teilt (Fig. 1b). Im Umfang 51 der Speichertrommel sind einige axiale Nuten 52 angebracht. Wo die Nuten die Fangscheibe kreuzen, ist diese mit einer Aussparung 53 versehen. Der Abschnitt 50 der Speichertrommel 45 ist von einer gestrichelt eingezeichneten Hülse 54 umgeben, so weit, dass ein Teilabschnitt 55 zwischen dem Hülsenende 56 und der Fangscheibe 47 frei und zugänglich bleibt. In die Hülse 54 mündet ein Saugrohr 60, dessen anderes Ende 61 in einem Sammelbehälter 62 für Schussfäden endet. Die Saugwirkung im Saugrohr 60 wird nach dem Prinzip erzeugt durch Treibluft, die durch ein Treibrohr 63 in das Saugrohr gedrückt wird. Im Saugrohr ist ein Sensor 64 angebracht, der nach dem Passieren des Endes des abgesaugten Schussfadens ein Signal erzeugt, dass die Webmaschine wieder betriebsbereit ist. Das Signal wird über eine Leitung 65 dem Steuerblock 37 zugeführt.The frame 3 also carries an intermediate storage drum 45 which is driven by an electric motor 46. The storage drum 45 has a catch disc 47 Catch hook 48, which divides the storage drum into two sections 49 and 50 (Fig. 1b). A few axial grooves 52 are provided in the circumference 51 of the storage drum. Where the grooves cross the catch disc, this is provided with a recess 53. The section 50 of the storage drum 45 is surrounded by a sleeve 54 shown in dashed lines to such an extent that a section 55 between the sleeve end 56 and the catching disk 47 remains free and accessible. A suction pipe 60 opens into the sleeve 54, the other end 61 of which ends in a collecting container 62 for weft threads. The suction effect in the suction pipe 60 is generated according to the principle by driving air which is pressed into the suction pipe by a driving pipe 63. A sensor 64 is attached in the suction tube, which, after passing the end of the suction weft thread, generates a signal that the weaving machine is ready for operation again. The signal is fed to the control block 37 via a line 65.

Die Arbeitsweise der Anordnung wird nachfolgend anhand der Figuren 2-12 beschrieben. Ausgegangen wird von der in Fig. 1 und 2 gezeigten Lage der Anordnung beinormalem Betrieb der Webmaschine.The operation of the arrangement is described below with reference to Figures 2-12. The starting point is the position of the arrangement shown in FIGS. 1 and 2 during normal operation of the loom.

Wenn der Schussfadenwächter 40 am Ende des Tunnelriets gemäss Fig. 1 einen Schussfehler feststellt, wird durch das dann erzeugte Fehlersignal der den Schussfaden nach unten blasende Schussfadenablenker 42 zwischen der Haupteintragsdüse 41 und dem Webfach betätigt, der verhindert, dass der nächste Schussfaden eingetragen wird. Gleichzeitig wird die Webmaschine zum Stillstand gebracht. Da der defekte Schussfaden bereits in die Kette eingewoben worden war, wird die Hauptwelle der Webmaschine zurückgedreht, bis die Bindung zwischen dem Schussfaden und den Kettfäden 30, 31 aufgehoben ist. Jetzt ergeht ein Steuersignal an den Steuerblock 37, der die folgenden Bewegungsabläufe in Reihenfolge veranlasst:

  • Fig. 3. Der Stellmotor 6 dreht den Stellmotor 7 im Uhrzeigersinn über einen Winkel α, so dass der Fadenklemmenträger 2 unterhalb der Speichertrommel 45 passieren kann.
  • Fig. 4. Der Stellmotor 7 fährt die Kolbenstange 11 aus und bewegt den Fadenklemmenträger 2 über einen Weg 70 (Fig. 1 und 2) bis oberhalb einer Hilfskante 71 des Webfaches 32.
  • Fig. 5. Der Stellmotor 6 dreht den Stellmotor 7 über einen Winkel β im Uhrzeigersinn weiter, bis die Fadenklemme 22 sich in der Verlustkante 71 und die Nadel 29 sich auf dem Gewebe 38 befindet.
  • Fig. 6. Die Nadel 29 wird von dem Mini-Stellmotor 16 auf dem Fadenklemmerträger 2 im Gegenuhrzeigersinn, d.h. in Richtung der Kettfäden 30, 31 gedreht.
  • Fig. 7. Gleichzeitig mit der erwähnten Bewegung der Nadel 29 dreht der Stellmotor 7 den Fadenklemmenträger 2 aus dem Bereich des Gewebes 38.
  • Fig. 8. Dabei schiebt die Nadel 29 den zu entfernenden Schussfaden 72 in den Bereich der Fadenklemme 22. Der Mini-Stellmotor 15 schliesst die Fadenklemme 22, bestehend aus Backen 19 und Nase 21, so dass der Schussfaden 72 darin festgeklemmt ist.
  • Fig. 9. Der Stellmotor 6 dreht den Stellmotor 7 im Gegenuhrzeigersinn über einen Winkel β zurück, so dass der Fadenklemmenträger 2 mit dem eingeklemmten Schussfaden 72 ausserhalb des Bereiches der Kette 30, 31 gerät. Er liegt dann wieder wie in Fig. 4 dargestellt.
  • Fig. 10. Der Stellmotor 7 zieht den Fadenklemmenträger 2 zurück und bewegt diesen vorbei an der Speichertrommel 45. Er liegt wieder wie in Fig. 3 gezeichnet.
  • Fig. 11. Der Stellmotor 6 dreht den Stellmotor 7 im Gegenuhrzeigersinn über den Winkel α zurück und bewegt dabei den Fadenklemmenträger 2 mit dem Schussfaden 72 in den Bereich der Fangscheibe 47 der Speichertrommel 45.
  • Fig. 12. Der Steuerblock 37 schaltet den Elektromotor 46 ein und die Speichertrommel 45 fängt zu drehen an. Der Schussfaden 72 wird von der Fangscheibe 47 erfasst und auf die Speichertrommel 45 aufgewickelt (Fig. 1b).
If the weft monitor 40 detects a weft error at the end of the tunnel reed according to FIG. 1, the then generated error signal actuates the weft deflector 42 which blows the weft down between the main insertion nozzle 41 and the shed, which prevents the next weft from being inserted. At the same time, the weaving machine is brought to a standstill. Since the defective weft thread had already been woven into the warp, the main shaft of the weaving machine is turned back until the bond between the weft thread and the warp threads 30, 31 is broken. Now a control signal is sent to the control block 37, which causes the following movement sequences in sequence:
  • Fig. 3. The servomotor 6 rotates the servomotor 7 clockwise through an angle α, so that the thread clamp carrier 2 can pass below the storage drum 45.
  • 4. The servomotor 7 extends the piston rod 11 and moves the thread clamp carrier 2 via a path 70 (FIGS. 1 and 2) to above an auxiliary edge 71 of the shed 32.
  • Fig. 5. The servomotor 6 rotates the servomotor 7 clockwise through an angle β until the thread clamp 22 is in the loss edge 71 and the needle 29 is on the tissue 38.
  • Fig. 6. The needle 29 is rotated by the mini servomotor 16 on the thread clamp carrier 2 in a counterclockwise direction, ie in the direction of the warp threads 30, 31.
  • Fig. 7. Simultaneously with the mentioned movement of the needle 29, the servomotor 7 rotates the thread clamp carrier 2 from the area of the fabric 38.
  • Fig. 8. The needle 29 pushes the weft 72 to be removed into the area of the thread clamp 22. The mini servomotor 15 closes the thread clamp 22, consisting of jaws 19 and nose 21, so that the weft 72 is clamped therein.
  • Fig. 9. The servomotor 6 rotates the servomotor 7 counterclockwise through an angle β, so that the thread clamp carrier 2 with the pinched weft 72 goes outside the area of the chain 30, 31. It is then again as shown in Fig. 4.
  • Fig. 10. The servomotor 7 pulls the thread clamp carrier 2 back and moves it past the storage drum 45. It lies again as shown in Fig. 3.
  • 11. The servomotor 6 rotates the servomotor 7 counterclockwise back through the angle α and thereby moves the thread clamp carrier 2 with the weft thread 72 into the region of the catch disc 47 of the storage drum 45.
  • Fig. 12. The control block 37 turns on the electric motor 46 and the storage drum 45 starts rotating. The weft thread 72 is gripped by the catch disc 47 and wound onto the storage drum 45 (FIG. 1b).

Der Mini-Stellmotor 15 öffnet nach Aufwickeln einiger Windungen die Fadenklemme 22. Der Mini-Stellmotor 16 dreht die Nadel 29 in ihre Ausgangslage zurück. Das Aufwickeln des Schussfadens wird im Abschnitt 50 rechts von der Fangscheibe 47 fortgesetzt. Es sei hier bemerkt, dass man im Abschnitt 49 soviele Windungen braucht, ungefähr 1 1/2, dass nach Oeffnen der Fadenklemme genügend Reibung da ist, dass beim Weiteraufwickeln im Abschnitt 50 der Schussfaden nicht rutscht. Nach dem Aufwickeln des Schussfadens tritt gemäss Fig. 1c ein Vorschubmechanismus 66 auf der Speichertrommel 45 in Wirkung. Dieser Mechanismus besteht im wesentlichen aus einer Kurventrommel 57, die gemäss Pfeil 58 in Fig. 1c rotierend angetrieben wird. Mittels dieser Kurventrommel werden Vorschubgleitstücke 59, welche in der Nut 52 der Zwischenspeichertrommel 45 laufen, entsprechend Pfeil 59′ hin- und herbewegt. Ein Teil 590 der Vorschubgleitstücke 59 ragt über die Oberfläche 44 der Zwischenspeichertrommel 45 radial hinaus, so dass die Fadenwindungen auf der Oberfläche 44 durch die Teile 590 in Fig. 1c nach rechts verschoben werden. Die Windungen gelangen so in die Hülse 54, in der sie vom Luftstrom erfasst und dem Saugrohr 60 übergeben werden. Der Schusfaden gelangt schliesslich in den Sammelbehälter 62.The mini servomotor 15 opens the thread clamp 22 after winding up a few turns. The mini servomotor 16 rotates the needle 29 back into its starting position. The winding of the weft thread is continued in section 50 to the right of the catch disc 47. It should be noted here that so many turns are required in section 49, approximately 1 1/2, that after opening the thread clamp there is enough friction that the weft thread does not slip when winding up in section 50. After winding up the weft thread, a feed mechanism 66 on the storage drum 45 comes into effect according to FIG. 1c. This mechanism essentially consists of a cam drum 57, which is driven to rotate according to arrow 58 in FIG. 1c. By means of this cam drum are feed slide pieces 59, which run in the groove 52 of the intermediate storage drum 45, to and fro according to arrow 59 '. A part 590 of the feed slide pieces 59 projects radially beyond the surface 44 of the intermediate storage drum 45, so that the thread turns on the surface 44 are shifted to the right by the parts 590 in FIG. 1c. The windings thus enter the sleeve 54, in which they are captured by the air flow and transferred to the suction pipe 60. The weft ends up in the collecting container 62.

Das Ueberführen des Schussfadens von der Oberfläche 44 der Zwischenspeichertrommel 45 zur Hülse 54 kann dadurch erleichtert werden, dass die Zwischenspeichertrommel in eine Drehbewegung entgegen dem Drehsinn beim Aufwickeln des Schussfadens versetzt wird.The transfer of the weft thread from the surface 44 of the intermediate storage drum 45 to the sleeve 54 can be facilitated in that the intermediate storage drum is set into a rotational movement counter to the direction of rotation when the weft thread is wound up.

Sobald das Ende des Schussfadens 72 den Sensor 64 im Saugrohr 60 passiert hat, erzeugt er ein Signal für den Steuerblock 37, dass die Webmaschine wieder betriebsbereit ist. Der Steuerblock schickt ein Startsignal an die Anstriebssteuerung und die Webmaschine läuft wieder an.As soon as the end of the weft 72 has passed the sensor 64 in the suction tube 60, it generates a signal for the control block 37 that the weaving machine is ready for operation again. The control block sends a start signal to the drive control and the weaving machine starts up again.

Bei der Ausführungsform der Zwischenspeichertrommel 45 nach Fig. 13 weist eine von einem Elektromotor 75 angetriebene Zwischenspeichertrommel 76 eine konische Oberfläche 77 auf. Die Oberfläche 77 ist von einem mittels eines Stellmotors 78 hin und her bewegbaren Mitnehmer 79 für den Schussfaden durchstossen. Sind die ersten paar Windungen des Schussfadens links vom Mitnehmer 79 auf die Trommel 76 aufgewickelt, zieht der Stellmotor 78 den Mitnehmer 79 ein und dieser verschwindet unterhalb der Oberfläche 77. Danach wird das Aufwickeln rechts vom Mitnehmer 79 fortgesetzt.In the embodiment of the intermediate storage drum 45 according to FIG. 13, an intermediate storage drum 76 driven by an electric motor 75 has a conical surface 77. The surface 77 is pierced by a driver 79 for the weft thread, which can be moved back and forth by means of a servomotor 78. If the first few turns of the weft thread are wound onto the drum 76 to the left of the driver 79, the servomotor 78 pulls in the driver 79 and this disappears below the surface 77. The winding is then continued to the right of the driver 79.

Bei der Ausführungsform nach Fig. 14 ist ein Fadenklemmenträger mit einem dritten Stellmotor 85 vorgesehen, der eine Schere 86 betätigt. Ein Scherenblatt 87 ist plattenförmig ausgeführt und um einen Zapfen 88 auf dem Fadenklemmenträger 2 drehbar. Das andere Scherenblatt 89 ist mit dem Stellmotor 85 verbunden. Beim Ausfahren einer Kolbenstange 90 des Stellmotors 85 wird das Scherenblatt 87 im Uhrzeigersinn gedreht und trennt einen Schussfaden 91 durch, bevor er durch die Fadenklemme 22 freigegeben wird.In the embodiment according to FIG. 14, a thread clamp carrier with a third servomotor 85 is provided, which actuates a pair of scissors 86. A scissor blade 87 is plate-shaped and rotatable about a pin 88 on the thread clamp carrier 2. The other scissor blade 89 is connected to the servomotor 85. When a piston rod 90 of the servomotor 85 is extended, the scissor blade 87 is rotated clockwise and cuts a weft thread 91 before it is released by the thread clamp 22.

Ein Bügel 92 soll das Einfangen des Schussfadens erleichtern. Er ist am unteren Scherenblatt 89 befestigt.A bow 92 is intended to facilitate the capture of the weft thread. It is attached to the lower scissor blade 89.

Claims (13)

1. An arrangement for removing a defective weft yarn from the shed of a loom, the arrangement comprising: a manipulator (1) which is disposed on one side of the loom and which provides three-dimensional control of a yarn clamp (22) between an inoperative position and a position for engagement of the weft yarn; detaching means (29) for detaching the weft yarn from the beating-up line of the cloth (38); and means (60) for removing the detached weft yarn, characterised in that an intermediate storage drum (48) is also provided, is rotatable by means of a drive (46) and has means (47, 48) for receiving the defective weft yarn, the intermediate storage drum (45) is disposed in the operative region of the yarn clamp (22), and the intermediate storage drum (45) is so connected to the inlet of the removal means (60) that the same can by suction supply the yarn to a collecting vessel after intermediate storage.
2. An arrangement according to claim 1, characterised in that the intermediate storage drum (45) has a weft yarn catch disc (47) and a catch hook (48) for receiving the defective weft yarn.
3. An arrangement according to claim 1, characterised in that the inlet of the removal means (60) is in the form of a sleeve (54) extending at least to some extent around the intermediate storage drum (45).
4. An arrangement according to claim 1, characterised in that the detaching means (29) are disposed on a yarn clamp carrier (2) of the yarn clamp (22).
5. An arrangement according to claim 4, characterised in that the detaching means (29) comprise a needle (29) which is rotatably secured to the yarn clamp carrier (2) and which an actuating motor (16) on the yarn clamp carrier actuates in a plane parallel to the warp (30, 31).
6. An arrangement according to claim 2, characterised in that the weft yarn catching disc (47) divides the storage drum (45) into two parts (49, 50).
7. An arrangement according to claims 3 and 6, characterised in that one part (50) of the storage drum (45) has the sleeve (54) extending around it to some extent and at a distance.
8. An arrangement according to claim 1, characterised in that the direction of rotation of the storage drum (45) is reversible and in one direction of rotation the storage drum draws the weft yarn (72) from the shed (32) and stores such yarn whereas in the converse direction of rotation the removal means (60) remove the weft yarn from the storage drum.
9. An arrangement according to claim 6, characterised in that the storage drum (45) is formed on its periphery (51) with at least one axial groove (52).
10. An arrangement according to claim 9, characterised in that a recess (53) is present in the catching disc (47) in the place where the groove (52) crosses the catching disc (47).
11. An arrangement according to claim 1, characterised in that the removal means (60) have a sensor (64) which after the passage of the end of the weft yarn (71) produces a start signal For the loom drive control.
12. An arrangement according to claim 4, characterised in that the yarn clamp (22) is embodied by a rotatable jaw (19) and a tenon (21) of the yarn clamp support or carrier (2), the jaw being controlled by an adjusting motor (15) disposed on the yarn clamp carrier.
13. An arrangement according to claim 1, characterised in that the intermediate storage drum (76) has a conical surface (77) through which an entraining member (79) extends, the entraining member being connected to an adjusting motor (78) for retraction and extension.
EP88810245A 1987-05-08 1988-04-18 Apparatus for releasing a defective weft yarn from the shed of a loom Expired - Lifetime EP0290383B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH177287 1987-05-08
CH1772/87 1987-05-08

Publications (2)

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EP0290383A1 EP0290383A1 (en) 1988-11-09
EP0290383B1 true EP0290383B1 (en) 1991-06-05

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EP88810245A Expired - Lifetime EP0290383B1 (en) 1987-05-08 1988-04-18 Apparatus for releasing a defective weft yarn from the shed of a loom

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US (1) US4899788A (en)
EP (1) EP0290383B1 (en)
JP (1) JPS63288248A (en)
BR (1) BR8802222A (en)
DE (1) DE3863120D1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1001507A3 (en) * 1988-03-10 1989-11-14 Picanol Nv Method for removing from gaap los an incorrect woof wire portion of looms.
DE3843399A1 (en) * 1988-10-11 1990-04-12 Dornier Gmbh Lindauer AIR WOVENING MACHINE WITH A DEVICE FOR REMOVING A DEFECTIVE WIFE FROM THE WEAVING COMPARTMENT
CZ278292B6 (en) * 1989-06-27 1993-11-17 Tovarny Textilnich Potreb Apparatus for catching and pulling out of a mispick on weaving machines
WO1991006696A1 (en) * 1989-11-02 1991-05-16 Mezhotraslevoi Nauchno-Tekhnichesky Komplex 'textil' Device for automatic elimination of weft thread breakage in shuttleless loom
US5199468A (en) * 1990-06-21 1993-04-06 Sulzer Brothers Limited Weft yarn clearing device
US5303745A (en) * 1991-06-11 1994-04-19 Sulzer Brothers Limited Weaving machine with weft break clearing devices
JP3157776B2 (en) * 1998-04-17 2001-04-16 津田駒工業株式会社 How to start the loom

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8202215A (en) * 1982-06-01 1984-01-02 Rueti Te Strake Bv Rinse-free weaving machine, provided with means for removing faulty weft threads from the weaving box.
US4502512A (en) * 1982-07-21 1985-03-05 Seisakusho Kabushiki Kaisha Toyoda Jidoshokki Method for treating a weft yarn upon stoppage of a shuttleless loom and device for effecting the same
NL8204665A (en) * 1982-12-01 1984-07-02 Rueti Te Strake Bv Rinse-free weaving machine, provided with means for removing faulty weft threads from the weaving box.
US4635686A (en) * 1984-10-24 1987-01-13 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method for treating a weft yarn in a shuttleless loom and device for effecting the same
KR890000569Y1 (en) * 1985-01-09 1989-03-11 쯔다고마 고오교오 가부시끼 가이샤 Shuttless weaving machines waste yarn removale apparatus
US4750528A (en) * 1986-07-04 1988-06-14 Tsudakoma Kogyo Kabushiki Kaisha Faulty weft remover for a fluid jet loom

Also Published As

Publication number Publication date
US4899788A (en) 1990-02-13
BR8802222A (en) 1988-12-06
EP0290383A1 (en) 1988-11-09
JPS63288248A (en) 1988-11-25
DE3863120D1 (en) 1991-07-11

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