EP0890665B1 - Weft yarn tensioning device and loom with such a device - Google Patents

Weft yarn tensioning device and loom with such a device Download PDF

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Publication number
EP0890665B1
EP0890665B1 EP19970810454 EP97810454A EP0890665B1 EP 0890665 B1 EP0890665 B1 EP 0890665B1 EP 19970810454 EP19970810454 EP 19970810454 EP 97810454 A EP97810454 A EP 97810454A EP 0890665 B1 EP0890665 B1 EP 0890665B1
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EP
European Patent Office
Prior art keywords
thread
weft thread
accordance
guide
weft
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
EP19970810454
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German (de)
French (fr)
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EP0890665A1 (en
Inventor
Godert Dr. De Jager
Lorant Gacsay
Dietmar Markward
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.)
Itema Switzerland Ltd
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Sulzer Textil AG
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Filing date
Publication date
Application filed by Sulzer Textil AG filed Critical Sulzer Textil AG
Priority to EP19970810454 priority Critical patent/EP0890665B1/en
Priority to DE59702662T priority patent/DE59702662D1/en
Publication of EP0890665A1 publication Critical patent/EP0890665A1/en
Application granted granted Critical
Publication of EP0890665B1 publication Critical patent/EP0890665B1/en
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Classifications

    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34Handling the weft between bulk storage and weft-inserting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20Co-operating surfaces mounted for relative movement
    • B65H59/26Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/32Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • B65H59/34Surfaces movable automatically to compensate for variation in tension
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/31Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a device for tensioning a Weft thread according to the preamble of claim 1 and a weaving machine with such a device.
  • weft insertion device proves the permanent strain on the thread due to the Friction in the eyelets forming a triangle as well which at e.g. tear-sensitive yarns less Weft insertion performance due to the stretch impact as disadvantageous.
  • the invention has for its object a Improve device for tensioning a weft thread.
  • weft thread is characterized by the features of Claim 9 characterized. It proves to be advantageous here that the resting thread length between Thread store and thread guide shortened and the Device can be arranged near the thread store can, so that the impact of the stretch impact on the Weft is reduced.
  • the Device includes a retractor lever 1 with a Driver 2 and a guide device 3 for one Weft 4, which together on a disc-shaped Support body 5 are mounted.
  • the back lever 1 is a one-armed lever, which on the output shaft of a electric motor 6 is mounted.
  • the driver 2 is a cylindrical pin at the free end of the Retractor lever 1 is attached and with its free End of a running level 7 describes.
  • the leadership facility 3 contains a first and a second disk-shaped plate 8, 9, which are arranged parallel to each other and a Determine guide level 11 for the weft. In the Plates 8, 9 have circular grooves 10. Between the plates 8, 9 is a deflection pin 12 for the Arranged weft.
  • the device has a Thread clamp 13, which is arranged between the plates 8 3 and 4 will be described with reference to FIGS. as well as a control device which, with respect to the Fig. 5 will be described.
  • the retraction lever 1 and the guide device is arranged in relation to one another, that the axis of rotation of the back lever with respect to the Guide level for the weft thread is inclined.
  • the driver 2 during a Rotation of the retraction lever 1 via Angle of rotation range in the grooves 10 of the plates 8, 9 guided, the driver the management level 11 for the Weft sweeps.
  • the Control device contains an electronic computer 51 and a motor controller 52.
  • the computer 51 is signal-transmitting with the angle encoder 53 of the weaving machine connected.
  • the computer 51 controls via the engine controller 52 the drive motor 6 of the retraction lever 1, such that the drive motor synchronized with the weaving machine movement running.
  • the drive motor 6 is a position sensor 54 assigned.
  • the control device is also with the Electromagnet 25 connected.
  • Fig. 6 shows the application of the device in one Weaving machine having a weft store 31, a Weft brake 32, a thread guide 33, the Device and a weft insertion device 35 contains.
  • the weft store 31 and the thread guide 33 are arranged so that the distance between thread eyelet of the weft thread store 31 and the thread guide 33 is a maximum of 100 cm. If a weft store 31 provided with an integrated weft brake, the Device arranged directly on the thread store 31 become.
  • Fig. 6 shows the device in front of the Shot entry, the device being a Assumes basic position "A" without touching the thread and the Weft thread starting from the weft store 31, over the thread brake 32 and the thread guide 33 and the thread clamp and Thread guide 12 in the device for the insertion device 35 runs as shown by a solid line 38 is shown.
  • the V-shaped thread length forms a thread supply.
  • This Device becomes a guide device 41 for the Weft through the first plate 8 and one circular curved rod 42 with a round cross section educated.
  • the rod 42 is held on holders 43 which the first plate 8 are attached (Fig. 7).
  • a thread clamp 44 is provided which is held by a holder 45 is attached to the first plate 8.
  • the advantage of this The device consists in the better accessibility of the Thread guide and clamp for cleaning and especially visual surveillance and Setting the operating steps or sequences.
  • the devices described above can be used a rapier or air weaving machine and at Multi-phase looms with multiple entry systems be applied. Depending on the entry process, the Thread clamp can be omitted or the duration of the Weft guide and thread length storage be interpreted accordingly.
  • the device consists essentially of a Guide device 3, which determines a management level and a retractor 2, which runs along a circular path is movable to deflect the weft.
  • the Rotation axis of the retraction member 2 is inclined to Management level 11 arranged so that the retractor 2nd the weft travel within one revolution sweeps over. In this device, the Deflection of the weft thread in the guide plane 11 for the weft.

Description

Die Erfindung betrifft eine Vorrichtung zum Spannen eines Schussfadens gemäss dem Oberbegriff des Anspruches 1 und eine Webmaschine mit einer derartigen Vorrichtung.The invention relates to a device for tensioning a Weft thread according to the preamble of claim 1 and a weaving machine with such a device.

Im Laufweg des Schussfadens sind für gewöhnlich zwei Fadenführer mit Ösen für den Schussfaden und zwischen diesen Ösen eine Vorrichtung zum Spannen eines Schussfadens durch Zurückziehen des Schussfadens angeordnet, welche einen Rückzieherhebel und eine Antriebseinrichtung für diesen Hebel enthält. Ein solche Vorrichtung ist aus der CH 685 712 A, die als nächstliegender Stand der Technik angesehen wird, bekannt. Der Rückzieherhebel ist zwischen den Fadenführern in einer quer zum Schussfaden verlaufenden Ebene schwenkbar. Durch diese Bewegung wird aus der nach Abschluss der Schussfadeneintragung freiwerdende Fadenlänge eine Schlaufe gebildet. Mit dem Einsetzen der Fadeneintragung und des dadurch verursachten Fadenabzuges, wird der Rückzieherhebel aktiv betätigt und gibt die durch ihn gespeicherte Fadenlänge frei. Ist diese Fadenlänge aufgebraucht, erfolgt der Abzug direkt vom Fadenspeicher. Beim Uebergang vom bereits bewegten zum ruhenden Fadenabschnitt, der sich ausgehend von der vordersten Windung auf dem Fadenspeicher bis zum ersten Fadenführer erstreckt tritt ein sogenannter Streckschlag, d.h. eine schlagartige Erhöhung der Zugspannung im Faden auf. There are usually two in the path of the weft Thread guide with eyelets for the weft thread and between these eyelets a device for tensioning a Weft by pulling back the weft arranged which is a retractor lever and contains a drive device for this lever. Such a device is from CH 685 712 A, which is considered to be the closest prior art. The back lever is in between the thread guides pivotable on a plane running transversely to the weft thread. This movement will result in the completion of the Weft thread entry free thread length one Loop formed. With the insertion of the thread entry and the thread draw caused thereby, the Retractor lever actively actuates and releases through it saved thread length free. Is this thread length used up, the withdrawal takes place directly from the thread store. At the transition from the already moving to the resting one Thread section starting from the foremost Twist on the thread store up to the first thread guide a stretch stroke occurs, i.e. a sudden increase in tension in the thread.

Bei der bekannten Schussfadeneintragsvorrichtung erweist sich die dauernde Beanspruchung des Fadens aufgrund der Reibung in den ein Fadendreieck bildenden Ösen als auch die bei z.B. reissempfindlichen Garnen geringere Schusseintragsleistung aufgrund des Streckschlages als nachteilig.In the known weft insertion device proves the permanent strain on the thread due to the Friction in the eyelets forming a triangle as well which at e.g. tear-sensitive yarns less Weft insertion performance due to the stretch impact as disadvantageous.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Spannen eines Schussfadens zu verbessern.The invention has for its object a Improve device for tensioning a weft thread.

Diese Aufgabe wird erfindungsgemäss mit den Merkmalen des Anspruches 1 gelöst. Durch Auslenkung des Schussfadens in der Führungsebene durch das Rückziehorgan wird die Reibung zwischen Faden und Rückziehorgan verringert und in der Folge Fadenbrüche vermieden.This object is achieved with the features of Claim 1 solved. By deflecting the weft in the management level through the withdrawal body Reduced friction between thread and retractor and consequently, thread breaks avoided.

Eine Webmaschine mit einer Vorrichtung zum Spannen eines Schussfadens ist erfindungsgemäss durch die Merkmale des Anspruches 9 gekennzeichnet. Als vorteilhaft erweist sich hierbei, dass die ruhende Fadenlänge zwischen Fadenspeicher und Fadenführer verkürzt und die Vorrichtung nahe dem Fadenspeicher angeordnet werden kann, so dass die Einwirkung des Streckschlages auf den Schussfaden verringert wird.A loom with a device for tensioning a According to the invention, weft thread is characterized by the features of Claim 9 characterized. It proves to be advantageous here that the resting thread length between Thread store and thread guide shortened and the Device can be arranged near the thread store can, so that the impact of the stretch impact on the Weft is reduced.

Vorteilhafte Ausführungsformen der Erfindung ergeben sich aus den abhängigen Ansprüchen.Advantageous embodiments of the invention result from the dependent claims.

Im folgenden wird die Erfindung anhand der beiliegenden Zeichnungen erläutert.In the following the invention with reference to the enclosed Drawings explained.

Es zeigen:

Fig. 1
Eine Ansicht einer Ausführungsform eines erfindungsgemässen Fadenspanners in vereinfachter Darstellung;
Fig. 2
eine Draufsicht des Fadenspanners gemäss Fig. 1;
Fig. 3
einen Schnitt entlang der Linie III-III in Fig. 2;
Fig. 4
einen Schnitt entlang der Linie IV-IV in Fig. 3;
Fig. 5
ein Blockschaltbild einer Steuereinrichtung für die Vorrichtung;
Fig. 6
eine schematische Darstellung von am Schussfadeneintrag beteiligter Elemente und die Vorrichtung gemäss Fig. 1;
Fig. 7
eine Ansicht einer zweiten Ausführungsform der erfindungsgemässen Vorrichtung und
Fig. 8
einen Schnitt entlang der Linie VIII-VIII in Fig. 7.
Show it:
Fig. 1
A view of an embodiment of a thread tensioner according to the invention in a simplified representation;
Fig. 2
a plan view of the thread tensioner according to FIG. 1;
Fig. 3
a section along the line III-III in Fig. 2;
Fig. 4
a section along the line IV-IV in Fig. 3;
Fig. 5
a block diagram of a control device for the device;
Fig. 6
a schematic representation of elements involved in weft insertion and the device according to FIG. 1;
Fig. 7
a view of a second embodiment of the device according to the invention and
Fig. 8
a section along the line VIII-VIII in Fig. 7th

Es wird auf die Fig. 1 und 2 Bezug genommen. Die Vorrichtung enthält einen Rückzieherhebel 1 mit einem Mitnehmer 2 und eine Führungseinrichtung 3 für einen Schussfaden 4, die gemeinsam an einem scheibenförmigen Tragkörper 5 montiert sind. Der Rückzieherhebel 1 ist ein einarmiger Hebel, welcher auf der Abtriebswelle eines elektrischen Motors 6 montiert ist. Der Mitnehmer 2 ist ein zylindrischer Stift, der am freien Ende des Rückzieherhebels 1 befestigt ist und mit seinem freien Ende eine Laufebene 7 beschreibt. Die Führungseinrichtung 3 enthält eine erste und zweite scheibenförmige Platte 8, 9, die zueinander parallel angeordnet sind und eine Führungsebene 11 für den Schussfaden bestimmen. In den Platten 8, 9 sind kreisförmige Nuten 10 ausgebildet. Zwischen den Platten 8, 9 ist ein Umlenkstift 12 für den Schussfaden angeordnet. Ferner weist die Vorrichtung eine Fadenklemme 13 auf, die zwischen den Platten 8 angeordnet ist und mit Bezug auf die Fig. 3 und 4 beschrieben wird, sowie eine Steuereinrichtung auf, die mit Bezug auf die Fig. 5 beschrieben wird.Reference is made to FIGS. 1 and 2. The Device includes a retractor lever 1 with a Driver 2 and a guide device 3 for one Weft 4, which together on a disc-shaped Support body 5 are mounted. The back lever 1 is a one-armed lever, which on the output shaft of a electric motor 6 is mounted. The driver 2 is a cylindrical pin at the free end of the Retractor lever 1 is attached and with its free End of a running level 7 describes. The leadership facility 3 contains a first and a second disk-shaped plate 8, 9, which are arranged parallel to each other and a Determine guide level 11 for the weft. In the Plates 8, 9 have circular grooves 10. Between the plates 8, 9 is a deflection pin 12 for the Arranged weft. Furthermore, the device has a Thread clamp 13, which is arranged between the plates 8 3 and 4 will be described with reference to FIGS. as well as a control device which, with respect to the Fig. 5 will be described.

Wie insbesondere Fig. 2 zeigt, sind der Rückzieherhebel 1 und die Führungseinrichtung so zueinander angeordnet, dass die Drehachse des Rückzieherhebels bezüglich der Führungsebene für den Schussfaden geneigt ist. Durch diese Anordnung wird der Mitnehmer 2 während einer Umdrehung des Rückzieherhebel 1 über ein Drehwinkelbereich in den Nuten 10 der Platten 8, 9 geführt, wobei der Mitnehmer die Führungsebene 11 für den Schussfaden überstreicht.As particularly shown in FIG. 2, the retraction lever 1 and the guide device is arranged in relation to one another, that the axis of rotation of the back lever with respect to the Guide level for the weft thread is inclined. By this arrangement is the driver 2 during a Rotation of the retraction lever 1 via Angle of rotation range in the grooves 10 of the plates 8, 9 guided, the driver the management level 11 for the Weft sweeps.

Wie die Fig. 3 und 4 zeigen, besteht die Fadenklemme 13 aus einem Federdraht 21, der in der ersten Platte 8 eingelegt ist, einer Blattfeder 22, die an einem Endabschnitt 23 in der zweiten Platte 9 eingelegt und 50 ausgebildet ist, dass der andere Endabschnitt 24 an der Innenseite der ersten Platte 8 anliegt und einen Elektromagneten 25 mit einem Ankerteil 26 zum Oeffnen der Klemme und einer Druckfeder 27 zum Schliessen der Klemme.As shown in FIGS. 3 and 4, there is the thread clamp 13 a spring wire 21 which is in the first plate 8 is inserted, a leaf spring 22 which on a End section 23 inserted in the second plate 9 and 50 is formed that the other end portion 24 on the Bears inside of the first plate 8 and one Electromagnet 25 with an armature part 26 for opening the Clamp and a compression spring 27 to close the clamp.

Die Fig. 5 zeigt ein Blockschaltbild einer Steuereinrichtung für die Vorrichtung. Die Steuereinrichtung enthält einen elektronischen Rechner 51 und einen Motorregler 52. Der Rechner 51 ist signalübertragend mit dem Winkelgeber 53 der Webmaschine verbunden. Der Rechner 51 steuert über den Motorregler 52 den Antriebsmotor 6 des Rückzieherhebels 1, derart, dass der Antriebsmotor synchron mit der Webmaschinenbewegung läuft. Dem Antriebsmotor 6 ist ein Positionsgeber 54 zugeordnet. Die Steuereinrichtung ist ferner mit dem Elektromagnet 25 verbunden.5 shows a block diagram of a Control device for the device. The Control device contains an electronic computer 51 and a motor controller 52. The computer 51 is signal-transmitting with the angle encoder 53 of the weaving machine connected. The computer 51 controls via the engine controller 52 the drive motor 6 of the retraction lever 1, such that the drive motor synchronized with the weaving machine movement running. The drive motor 6 is a position sensor 54 assigned. The control device is also with the Electromagnet 25 connected.

Die Fig. 6 zeigt die Anwendung der Vorrichtung in einer Webmaschine, die einen Schussfadenspeicher 31, eine Schussfadenbremse 32, einen Fadenführer 33, die Vorrichtung und eine Schussfadeneintragvorrichtung 35 enthält. Der Schussfadenspeicher 31 und der Fadenführer 33 sind so angeordnet, dass der Abstand zwischen Fadenöse des Schussfadenspeichers 31 und dem Fadenführer 33 maximal 100 cm beträgt. Wird ein Schussfadenspeicher 31 mit integrierter Schussfadenbremse vorgesehen, kann die Vorrichtung unmittelbar am Fadenspeicher 31 angeordnet werden.Fig. 6 shows the application of the device in one Weaving machine having a weft store 31, a Weft brake 32, a thread guide 33, the Device and a weft insertion device 35 contains. The weft store 31 and the thread guide 33 are arranged so that the distance between thread eyelet of the weft thread store 31 and the thread guide 33 is a maximum of 100 cm. If a weft store 31 provided with an integrated weft brake, the Device arranged directly on the thread store 31 become.

Nachfolgend wird die Funktionsweise der Vorrichtung erläutert. Der Vorgang der Schusseintragung in einer Projektilwebmaschine ist bekannt und wird daher nicht beschrieben.Below is the operation of the device explained. The process of shooting in one Projectile loom is known and therefore will not described.

Die Fig. 6 zeigt die Vorrichtung vor der Schusseintragung, wobei die Vorrichtung eine Grundstellung "A" ohne Fadenberührung einnimmt und der Schussfaden ausgehend vom Schussfadenspeicher 31, über die in einer Bremsstellung befindliche Fadenbremse 32 und den Fadenführer 33 sowie die Fadenklemme und den Fadenführer 12 in der Vorrichtung zur Eintragvorrichtung 35 verläuft, wie dies durch eine durchgehende Linie 38 dargestellt ist. Die V-förmige angeordnete Fadenlänge bildet einen Fadenvorrat. Nach dem Abschuss des Projektils wird einerseits der Schussfaden in das Webfach eingezogen, wobei der Schussfaden aus der Fadenklemme 13 herausgezogen und von den Fadenführern 33 und 12 geführt wird, wie dies durch die gestrichelte Linie 39 gezeigt ist und andererseits der Rückzieherhebel 1 im Gegenuhrzeigersinn in Drehung versetzt. Aufgrund der geneigten Anordnung von Führungseinrichtung 2 und Rückzieherhebel 1 wird der Mitnehmer mit fortschreitender Drehung in die Führungsebene bzw. Nute eintauchen und zwar vorerst ohne Fadenberührung. Mit fortschreitenden Eintragsvorgang wird die Zurückschiebung des Projektils im Fangwerk eingeleitet. Zu diesem Zeitpunkt hat der Mitnehmer 2 aufgrund der Drehbewegung des Rückziehhebels 1 die Position "B" erreicht und steht mit dem Schussfaden in Berührung.Fig. 6 shows the device in front of the Shot entry, the device being a Assumes basic position "A" without touching the thread and the Weft thread starting from the weft store 31, over the thread brake 32 and the thread guide 33 and the thread clamp and Thread guide 12 in the device for the insertion device 35 runs as shown by a solid line 38 is shown. The V-shaped thread length forms a thread supply. After the launch of the On the one hand, projectile becomes the weft thread in the shed retracted, the weft thread from the thread clamp 13 pulled out and guided by the thread guides 33 and 12 as shown by dashed line 39 is and on the other hand the back lever 1 in Counterclockwise rotation. Due to the inclined arrangement of guide device 2 and Withdrawal lever 1, the driver with progressive Immerse the rotation in the guide plane or groove and initially without touching the thread. With advancing The entry process is the retraction of the projectile initiated in the trap. At this point the Driver 2 due to the rotary movement of the pull lever 1 reaches position "B" and stands with the weft in touch.

In der darauffolgenden zweiten Phase wird durch die Koordinierung der Schubbewegung und Drehbewegung die freiwerdende Fadenlänge des eingezogenen Schussfadens mittels des Mitnehmers 2 zurückgezogen und dabei unter Spannung gehalten. Nach Abschluss dieser Vorgänge nimmt der Mitnehmer 2 die Stellung "C" ein und der Schussfaden verläuft entlang der strichpunktierten Linie 40 zwischen den Platten der Führungseinrichtung 3. Nachdem der Faden schusseitig durchschnitten ist, wird dieser zur Aufnahme durch ein Projektil bereitgestellt, wobei erneut eine Fadenlänge freigegeben wird. Bei diesem Vorgang wird in einer dritten Phase durch den Mitnehmer 2 die freigegebene Fadenlänge zurückgezogen und der Schussfaden in die Fadenklemme 13 eingeführt. Der Rückzieherhebel 1 wird danach in die Grundstellung "A" zurückgedreht, wobei der Mitnehmer 2 unter Freigabe des Schussfadens aus der Führungsebene 11 bewegt wird. Damit ist ein neuer Schussfaden bereitgestellt. In the subsequent second phase, the Coordination of the thrust movement and rotary movement free thread length of the drawn weft thread withdrawn by means of the driver 2 and thereby under Tension held. After completing these operations takes the driver 2 a position "C" and the weft runs along the dash-dotted line 40 between the plates of the guide device 3. After the thread is cut on the shot side, this becomes the recording provided by a projectile, again one Thread length is released. In this process, in a third phase by the driver 2 the released thread length withdrawn and the weft thread inserted into the thread clamp 13. The back lever 1 is then turned back to the basic position "A", whereby the driver 2 with the release of the weft from the Management level 11 is moved. This is a new one Weft provided.

Es wird auf die Fig. 7 und 8 Bezug genommen. Bei dieser Vorrichtung wird eine Führungseinrichtung 41 für den Schussfaden durch die erste Platte 8 und einen kreisförmig gebogenen Stab 42 mit rundem Querschnitt gebildet. Der Stab 42 ist an Haltern 43 gehalten, die an der ersten Platte 8 befestigt sind (Fig. 7). Ferner ist eine Fadenklemme 44 vorgesehen, die durch einen Halter 45 auf der ersten Platte 8 befestigt ist. Der Vorteil dieser Vorrichtung besteht in der besseren Zugänglichkeit der Fadenführung und -klemme zwecks Reinigung und insbesondere der visuellen Ueberwachung und zur Einstellung der Betriebsschritte bzw. -abläufe.Reference is made to FIGS. 7 and 8. At this Device becomes a guide device 41 for the Weft through the first plate 8 and one circular curved rod 42 with a round cross section educated. The rod 42 is held on holders 43 which the first plate 8 are attached (Fig. 7). Further is a thread clamp 44 is provided which is held by a holder 45 is attached to the first plate 8. The advantage of this The device consists in the better accessibility of the Thread guide and clamp for cleaning and especially visual surveillance and Setting the operating steps or sequences.

Die vorstehend beschriebenen Vorrichtungen können bei einer Greifer- oder Luftwebmaschine sowie bei Mehrphasenwebmaschinen mit mehreren Eintragssystemen angewendet werden. Je nach Eintragvorgang kann die Fadenklemme weggelassen werden bzw. die Dauer der Schussfadenführung und die Fadenlängenspeicherung entsprechend ausgelegt werden.The devices described above can be used a rapier or air weaving machine and at Multi-phase looms with multiple entry systems be applied. Depending on the entry process, the Thread clamp can be omitted or the duration of the Weft guide and thread length storage be interpreted accordingly.

Die Vorrichtung besteht im wesentlichen aus einer Führungseinrichtung 3, die eine Führungsebene bestimmt und einem Rückziehorgan 2, das entlang einer Kreisbahn bewegbar ist, um den Schussfaden auszulenken. Die Rotationsachse des Rückziehorgans 2 ist geneigt zur Führungsebene 11 angeordnet, so dass das Rückziehorgan 2 innerhalb einer Umdrehung den Schussfadenlaufweg überstreicht. Bei dieser Vorrichtung erfolgt die Auslenkung des Schussfadens in der Führungsebene 11 für den Schussfaden.The device consists essentially of a Guide device 3, which determines a management level and a retractor 2, which runs along a circular path is movable to deflect the weft. The Rotation axis of the retraction member 2 is inclined to Management level 11 arranged so that the retractor 2nd the weft travel within one revolution sweeps over. In this device, the Deflection of the weft thread in the guide plane 11 for the weft.

Claims (10)

  1. Apparatus for drawing back a weft thread after the completion of a weft thread insertion process in a weaving machine, comprising a draw-back member and a drive for the draw-back member characterised in that a guide device (3, 41) is provided which determines a guide plane (11) for the weft thread; and in that the draw-back member (2) can be moved along a circular path in order to deflect the weft thread within the guide plane, with the axis of rotation (14) of the draw-back member (2) being arranged at an inclination to the guide plane in such a manner that the draw-back member brushes over the path of travel of the weft thread within a rotation and adopts a reception position as well as a release position with respect to the weft thread.
  2. Apparatus in accordance with claim 1, characterised by a thread clamp (13, 44) for the weft thread and by an actuation apparatus (25, 26, 27) for the thread clamp (13, 44).
  3. Apparatus in accordance with claim 1 or claim 2 characterised in that the guide device (3) contains a first and a second guide member (8, 9; 42) which are arranged at a spacing and parallel to one another.
  4. Apparatus in accordance with one of the claims 1 to 3, characterised in that the thread clamp (13, 44) is arranged outside of or between the guide members (8, 9; 41).
  5. Apparatus in accordance with one of the claims 1 to 4, characterised by a deflection pin (12) for the weft thread.
  6. Apparatus in accordance with one of the claims 1 to 5 characterised in that the draw-back member consists of a one armed lever (1) and a pin (2).
  7. Apparatus in accordance with one of the claims 1 to 6 characterised in that the drive for the draw-back member (1, 2) is an electric motor (25).
  8. Apparatus in accordance with one of the claims 1 to 7 characterised by a control system with an electronic computer (51) which computes a sequence of movements for the electric motor (25) and determines the time point of the excitation of the electromagnet (25).
  9. Weaving machine comprising a weft thread store (31), a weft thread brake (32), a weft thread guide (33), a weft thread insertion apparatus (35) and an apparatus in accordance with one of the claims 1 to 8, characterised in that the distance between the thread eye of the thread store (31) at the exit side and the weft thread guide (33) amounts to 100 cm at most.
  10. Weaving machine in accordance with claim 9 characterised in that the weaving machine is executed as a projectile, rapier or air jet weaving machine.
EP19970810454 1997-07-09 1997-07-09 Weft yarn tensioning device and loom with such a device Expired - Lifetime EP0890665B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19970810454 EP0890665B1 (en) 1997-07-09 1997-07-09 Weft yarn tensioning device and loom with such a device
DE59702662T DE59702662D1 (en) 1997-07-09 1997-07-09 Device for tensioning a weft thread and weaving machine with such a device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19970810454 EP0890665B1 (en) 1997-07-09 1997-07-09 Weft yarn tensioning device and loom with such a device

Publications (2)

Publication Number Publication Date
EP0890665A1 EP0890665A1 (en) 1999-01-13
EP0890665B1 true EP0890665B1 (en) 2000-11-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970810454 Expired - Lifetime EP0890665B1 (en) 1997-07-09 1997-07-09 Weft yarn tensioning device and loom with such a device

Country Status (2)

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EP (1) EP0890665B1 (en)
DE (1) DE59702662D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10211148B3 (en) * 2002-03-14 2004-02-12 Lindauer Dornier Gmbh The weft yarn tensing mechanism at a jet loom, on a weft which has been cut to length for insertion, has two yarn guides where one has movement to give a retracting pull on the yarn with a controlled release
EP1777329A1 (en) * 2005-10-01 2007-04-25 Markus Farner Dummy shuttle loom

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156441A (en) * 1978-03-14 1979-05-29 Lindauer Dornier Gesellschaft Mbh Yarn tensioner for weaving machines
CH654601A5 (en) * 1982-04-07 1986-02-28 Sulzer Ag Weft thread tensioning device for weaving machines, especially gripper pojectile weaving machines.
EP0389410A1 (en) * 1989-03-17 1990-09-26 Sulzer RàœTi Ag Weft threading system for a loom
CH677369A5 (en) * 1989-09-18 1991-05-15 Sulzer Ag Controlled weft feed - has yarn guide driven between drums to minimise strain on weft between drums
CH685712A5 (en) * 1992-08-25 1995-09-15 Sulzer Ag Tensioner for retracted laid weft yarn length

Also Published As

Publication number Publication date
DE59702662D1 (en) 2000-12-28
EP0890665A1 (en) 1999-01-13

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