EP0189497B1 - Arrangement for the insertion of at least one weft thread into looms - Google Patents

Arrangement for the insertion of at least one weft thread into looms Download PDF

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Publication number
EP0189497B1
EP0189497B1 EP85100856A EP85100856A EP0189497B1 EP 0189497 B1 EP0189497 B1 EP 0189497B1 EP 85100856 A EP85100856 A EP 85100856A EP 85100856 A EP85100856 A EP 85100856A EP 0189497 B1 EP0189497 B1 EP 0189497B1
Authority
EP
European Patent Office
Prior art keywords
weft
yarn
tensioning device
thread
arrangement according
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
Application number
EP85100856A
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German (de)
French (fr)
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EP0189497A1 (en
Inventor
Paul Lincke
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
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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
Priority to DE8585100856T priority Critical patent/DE3564596D1/en
Priority to EP85100856A priority patent/EP0189497B1/en
Priority to US06/817,423 priority patent/US4649965A/en
Priority to SU864007952A priority patent/SU1454260A3/en
Priority to JP61011231A priority patent/JPS61174446A/en
Publication of EP0189497A1 publication Critical patent/EP0189497A1/en
Application granted granted Critical
Publication of EP0189497B1 publication Critical patent/EP0189497B1/en
Expired legal-status Critical Current

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    • 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

Definitions

  • the invention relates to an arrangement for inserting at least one weft thread for weaving machines, in particular rapier projectile weaving machines, with a first weft thread tensioning device and a weft thread transfer device for holding the weft thread until it is transferred to a weft thread insertion device.
  • the invention has for its object to provide a weft tensioning device of the type defined, these adverse phenomena can not occur.
  • This object is achieved according to the invention by the features specified in the characterizing part of claim 1.
  • the subclaims relate to advantageous further developments.
  • FIG. 1 shows an arrangement for inserting eight weft threads in alternating operation according to the sample program, which consists of a weft thread tensioning device and a weft thread tensioning device II.
  • the tensioning device is described below with reference to FIG. 2.
  • the tensioning device I has a thread tensioner 1 in the form of a bracket which can be rotated about an axis 2.
  • the thread tensioner 1 is guided with a roller 3 on a control disk 4 which is driven by the main shaft of the weaving machine.
  • a crossbar 5 of the thread tensioner 1 swings in the machine rhythm across a set 6 of weft threads, each of which originates from a supply spool (not shown).
  • the crossbar is provided with eight thread troughs.
  • Furthermore, on both sides of the crossbar 5 there is a carrier 11 and 12, each with eight thread eyelets 13 and 14.
  • FIG. 3 shows three of the eight holding elements which are fastened on the carrier 8.
  • Each holding element 18 consists of two lamellae 18 ′ and 18 ′′, which can hold a weft thread deflected by the thread tensioner 1 by means of their spring.
  • the holding elements fastened on the carrier 9 are designated by 19 in FIG. 1.
  • the weft thread device II has eight thread tensioners 25 in the form of a lever with a thread trough 26 which is rotatable about an axis 27. There is a thread eyelet 28 and 29 on both sides of each thread trough, which are attached to supports 30 and 31, respectively.
  • the weft thread family 6 passes through the tensioning device II and a transmitter nozzle 32, the mouth 33 of which ends in the firing position in front of a gripper projectile. Only the thread clamp 34 is drawn from the projectile.
  • the transmitter nozzle 32 is fed with compressed air via a line 35. Any weft, e.g.
  • each thread tensioner 25 is actuated synchronously with the thread tensioner 1 by an associated motor 37 in accordance with the fabric pattern program, so that the selected thread tensioner 25 is moved up and down between a deflected position 25 ′ and a release position 25 ′′.
  • Fig. 1 The position shown in Fig. 1 is taken as the starting point for the following explanation of the operation of the arrangement. All weft threads are deflected by thread tensioners 1 and 25. The weft threads deflected by the crossbar 5 are held in this position by the holding elements 18 and 19. All weft threads in both tensioning devices I and II are tensioned by pulling the compressed air flowing through the transmitter nozzle 32. The thread clamp 34 is open. When the selected weft thread is inserted - here again the weft thread 16 is considered as an example, the associated thread tensioner 25 first swings clockwise, so that the weft thread can stretch freely in position 16 'due to the tensile force of the nozzle 32.
  • the nozzle 32 blows the end 16 "of the weft thread into the thread clamp 34 of the projectile.
  • the weft thread moves forward over a length x. This length is referred to here as the transfer length.
  • the thread clamp 34 is now closed. The position is as shown in FIG. 4.
  • the thread tensioner 1 of the thread tensioning device was simultaneously lifted from the control disk 4.
  • the holding elements 18 and 19 hold the thread 16 in the deflected position, when the transfer of the weft thread to the thread clamp 34 of the projectile has ended the thread tensioner 1 has reached the position 1 '.
  • the projectile is shot into the shed by a firing mechanism 38.
  • the weft thread 16 is pulled out of the holding elements 18 and 19.
  • the thread brake 17 was opened before the projectile was fired , so that the weft with the required entry length is pulled off the supply spool and entered the shed will agen.
  • the control disk 4 continuously moves the thread tensioner 1 upward, so that the weft thread can stretch freely into the position 16 ′′ under the influence of the tensile force of the projectile 32.
  • the weft threads not to be entered remain clamped in their holding elements the corresponding thread tensioner of the thread tensioning devices II of the weft threads not to be inserted in their deflected position lowered by the control disk 4, so that the weft thread remains stretched.
  • An edge thread clamp on both sides of the shed takes over the weft thread.
  • the weft thread is cut through on the weft side by scissors 39 and released on the catch side by the projectile by opening the thread clamp 34. D the thread is struck by the reed. The weft thread is deflected further by the thread tensioner 1, which further lowers and additionally by the thread tensioner 25, which also lowers, until its end lies within the mouth 33 of the nozzle 32. While the thread tensioner 1 moves to the low position with the weft thread, the thread is clamped between the holding elements 18 and 19.
  • a transport device picks up the projectile ejected from the trap and transports it back to the launch site outside the shed. The projectile is opened by the projectile opener and at the same time swung by a projectile lifter in front of the nozzle 32, so that it is ready to take up the next weft thread. The position is then again as in FIG. 1.
  • FIG. 5 shows an exemplary embodiment, the holding elements 40 and 41 for the weft threads reaching up to the height of the stretched weft threads 42 ′ or even slightly beyond.
  • Such long holding elements brake the weft thread practically during its entire insertion movement. Due to the friction experienced by the weft thread, the weft thread is stretched evenly and not jerkily during the entry process, so that it is not excessively stressed.
  • the arrangement consists of a first tensioning device 111 with a thread tensioner 44 and a second tensioning device IV.
  • the tensioning device IV has a thread tensioner 45 in the form of a double lever for each weft thread, which is rotatable about a fixed point 46 and on its free end is provided with a thread eyelet 47 for the weft thread.
  • the other end of the thread tensioner 45 is connected to an actuating rod 48 of an actuating motor 49.
  • the first tensioning device 111 and the tensioning device IV thus have the thread eyelets 47 in common.
  • the arrangement works in such a way that the transfer of the weft thread 50 to be inserted to the thread clamp of the projectile takes place by a counterclockwise rotation of the thread tensioner 45, so that its part 45 ′ moves the weft thread from the position 47 ′ to the right into the position 47 ′ by means of the thread eyelet Layer 47 ". There is thus a partial stretching or forward movement of the weft thread, so that the thread length x is released for transfer to the projectile.
  • the tensioning device 111 and IV pivoted back into its deflected positions.
  • a pivot point 55 of a thread tensioner 56 of a tensioning device V is selected such that the thread eyelet 57 of the thread tensioner lies in a position 57 'below a transmitter gland 58 at the end of the release movement of the tensioning device.
  • a tensioning device VI for each weft thread has on the one hand three deflecting bodies 65, 66 and 67 below a weft thread 68 and on the other hand two deflecting bodies 69 and 70 which are fastened to an actuating rod 71 of an actuating motor 72.
  • the deflection bodies 69 and 70 are located between the deflection bodies 65, 66 and 67, respectively, so that two loops 73 and 74 are formed and the weft thread end 68 lies in the mouth of a donor nozzle 75.
  • the actuating rod 71 is raised from the low position 71 'by the servomotor 72, so that the two loops 73 and 74 stretch and give a total of the transfer length x to the projectile.
  • both tensioning devices are pivoted back into their deflected position.
  • FIG. 9 shows an exemplary embodiment of an arrangement for inserting the weft threads in two-weft or mixed-change operation, two weft threads alternating or alternating be entered according to a specific sample program.
  • An insertion device is provided for each weft thread 85 or 86.
  • the insertion device 87 for the weft thread 85 consists of a tensioning device VII and a tensioning device VIII.
  • the insertion device 88 for the weft thread 86 consists of a tensioning device IX and a tensioning device X. Both entry devices 87 and 88 work alternately or according to the pattern program as before for the others Embodiments described.
  • the tensioning movement of the weft thread sections 85 'and 86' in the tensioning device VIII and X take place under the influence of a common thread tensioner 89 which vibrates transversely to the two weft threads in the machine rhythm.
  • the arrangement can also be rotated by 180 °, i.e. the thread deflection occurs upwards instead of downwards.

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

Description

Die Erfindung betrifft eine Anordnung zum Eintragen von mindestens einem Schussfaden für Webmaschinen, insbesondere Greiferprojektil-Webmaschinen, mit einer ersten Schussfadenspannvorrichtung und einer Schussfadenübergabevorrichtung zum Halten des Schussfadens bis zu dessen Übergabe an eine Schussfadeneintragsvorrichtung.The invention relates to an arrangement for inserting at least one weft thread for weaving machines, in particular rapier projectile weaving machines, with a first weft thread tensioning device and a weft thread transfer device for holding the weft thread until it is transferred to a weft thread insertion device.

Bei einer bekannten Vorrichtung dieser Art (EP-OS 090 878; Fig. 5) wird der Fadenspanner der Spannvorrichtung mit verhältnismässig geringer Beschleunigung von der Anfangslage in eine Zwischenlage angehoben, derart, dass der Fadenspanner mit dem einzutragenden Schussfaden in Berührung bleibt, wenn dieser von der Geberdüse angezogen wird. Dadurch findet die Übergabe des Schussfadens an das Projektil mit verhältnismässig geringer Geschwindigkeit statt, was die Zuverlässigkeit der Übergabe erhöht. Daraufhin wird der Fadenspanner mit grosser Geschwindigkeit und frei vom Faden von der Zwischenlage in die Endlage angehoben.In a known device of this type (EP-OS 090 878; Fig. 5), the thread tensioner of the tensioning device is raised from the initial position into an intermediate position with relatively little acceleration, such that the thread tensioner remains in contact with the weft thread to be inserted if it is from the donor nozzle is tightened. As a result, the weft thread is transferred to the projectile at a relatively slow speed, which increases the reliability of the transfer. The thread tensioner is then lifted from the intermediate position into the end position at high speed and free of the thread.

Die Erfahrung hat nun gelehrt, dass es eigentlich erforderlich ist, dass der Fadenspanner in der kurzen Zwischenphase zwischen den beiden Bewegungsabläufen verharrt, bis das Schussfadenende vom Projektil erfasst und dieses abschussbereit ist. Weil jedoch der Fadenspanner vor dem Zeitpunkt des Abschusses des Projektils in Richtung Endstellung in Bewegung sein muss damit der Schussfaden nicht bei der nachfolgenden plötzlichen Eintragsbewegung durch den Reibungswiderstand an den Umlenkstellen des Fadenspanners zerrissen wird, staut sich der Schussfaden vor dem Projektil auf und es kann geschehen, dass das Schussfadenende sich vor dem vollständigen Schliessen des Projektils schräg zu diesem stellt und nicht vom Projektil übernommen wird und ein sogenannter Verlierer entsteht oder aber, dass das Fadenende zwischen der Schlagnase der Abschussvorrichtung und dem Projektil gelangt und beim Abschiessen gequetscht wird.Experience has now shown that it is actually necessary for the thread tensioner to remain in the short intermediate phase between the two motion sequences until the end of the weft is caught by the projectile and the projectile is ready to fire. However, because the thread tensioner must be in the direction of the end position before the projectile is fired so that the weft thread is not torn by the frictional resistance at the deflection points of the thread tensioner during the subsequent sudden entry movement, the weft thread builds up in front of the projectile and it can happen that the weft end is at an angle to the projectile before it is completely closed and is not taken over by the projectile and a so-called loser occurs, or that the end of the thread gets between the beating nose of the launcher and the projectile and is squeezed when it is fired.

Der Erfindung liegt die Aufgabe zugrunde eine Schussfadenspannvorrichtung der eingangs definierten Art zu schaffen, wobei diese nachteiligen Erscheinungen nicht auftreten können. Diese Aufgabe wird gemäss der Erfindung durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst. Die Unteransprüche betreffen vorteilhafte Weiterbildungen.The invention has for its object to provide a weft tensioning device of the type defined, these adverse phenomena can not occur. This object is achieved according to the invention by the features specified in the characterizing part of claim 1. The subclaims relate to advantageous further developments.

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

  • Fig. 1 die Anordnung zum Eintragen von Schussfäden gemäss der Erfindung in schematischer Darstellung;
  • Fig. 2 ein Teil der Anordnung;
  • Fig. 3 einige Schussfaden-Halteelemente;
  • Fig. 4 die Anordnung in der Lage nach dem Übergeben des Schussfadens an das Projektil;
  • Fig. 5 eine abgewandelte Ausführung der Halteelemente;
  • Fig. 6, 7 und 8 eine abgewandelte Ausführungsform;
  • Fig. 9 eine Ausführungsform für Zweischuss- bzw. Mischwechselbetrieb.
Some embodiments of the subject matter of the invention are described below with reference to the drawings. It is:
  • Figure 1 shows the arrangement for inserting weft threads according to the invention in a schematic representation.
  • Fig. 2 shows part of the arrangement;
  • 3 shows some weft holding elements;
  • 4 shows the arrangement in the position after transferring the weft thread to the projectile;
  • 5 shows a modified embodiment of the holding elements;
  • 6, 7 and 8 a modified embodiment;
  • Fig. 9 shows an embodiment for two-shot or mixed change operation.

Fig. 1 zeigt eine Anordnung zum musterprogrammgemässen Eintragen von acht Schussfäden in Wechselbetrieb, die aus einer Schussfadenspannvorrichtung und einer Schussfadenspannvorrichtung II besteht. Die Spannvorrichtung ist nachfolgend anhand von Fig. 2 beschrieben.1 shows an arrangement for inserting eight weft threads in alternating operation according to the sample program, which consists of a weft thread tensioning device and a weft thread tensioning device II. The tensioning device is described below with reference to FIG. 2.

Die Spannvorrichtung I weist einen Fadenspanner 1 in Form eines Bügels auf, der um eine Achse 2 drehbar ist. Der Fadenspanner 1 ist mit einer Rolle 3 an einer Steuerscheibe 4 geführt, die von der Hauptwelle der Webmaschine angetrieben ist. Ein Querbalken 5 des Fadenspanners 1 schwingt im Maschinenrhythmus quer zu einer Schar 6 von Schussfäden, die je einer (nicht gezeichneten) Vorratsspule entstammen. Der Querbalken ist mit acht Fadenmulden versehen. Vor jeder Fadenmulde 7 befinden sich beidseits des Querbalkens 5 zwei Träger 8 bzw. 9 mit einem (deutlichkeitshalber hier nicht eingezeichneten) Halteelement für jeden Schussfaden. Weiterhin befindet sich beidseits des Querbalkens 5 ein Träger 11 bzw. 12 mit je acht Fadenösen 13 bzw. 14. Für jeden Schussfaden ist eine Fadenbremse vorgesehen, wovon nur eine, die für einen Schussfaden 16, eingezeichnet und mit der Bezugsnummer 17 versehen ist. Nach Durchlaufen der Spannvorrichtung 1 gelangt die Schussfadenschar 6 in die Schussfadenspannvorrichtung 11. Fig. 3 zeigt drei der acht Halteelemente, die auf dem Träger 8 befestigt sind. Jedes Halteelement 18 besteht aus zwei Lamellen 18' und 18", die durch ihre Feder einen vom Fadenspanner 1 ausgelenkten Schussfaden halten können. Die auf dem Träger 9 befestigten Halteelemente sind in Fig. 1 mit 19 bezeichnet.The tensioning device I has a thread tensioner 1 in the form of a bracket which can be rotated about an axis 2. The thread tensioner 1 is guided with a roller 3 on a control disk 4 which is driven by the main shaft of the weaving machine. A crossbar 5 of the thread tensioner 1 swings in the machine rhythm across a set 6 of weft threads, each of which originates from a supply spool (not shown). The crossbar is provided with eight thread troughs. In front of each thread trough 7 there are two supports 8 and 9 on both sides of the crossbar 5 with a holding element (not shown here for the sake of clarity) for each weft thread. Furthermore, on both sides of the crossbar 5 there is a carrier 11 and 12, each with eight thread eyelets 13 and 14. A thread brake is provided for each weft thread, of which only one, which is drawn for a weft thread 16, and is provided with the reference number 17. After passing through the tensioning device 1, the weft thread set 6 arrives in the weft thread tensioning device 11. FIG. 3 shows three of the eight holding elements which are fastened on the carrier 8. Each holding element 18 consists of two lamellae 18 ′ and 18 ″, which can hold a weft thread deflected by the thread tensioner 1 by means of their spring. The holding elements fastened on the carrier 9 are designated by 19 in FIG. 1.

In Fig. 1 sind beide Spannvorrichtungen I und II schematisch dargestellt. Die Schussfadenvorrichtung II weist acht Fadenspanner 25 in Form eines Hebels mit einer Fadenmulde 26 auf, der um eine Achse 27 drehbar ist. Beidseits jeder Fadenmulde befindet sich eine Fadenöse 28 bzw. 29, die auf Trägern 30 bzw. 31 befestigt sind. Die Schussfadenschar 6 durchläuft von der Spannvorrichtung I kommend die Spannvorrichtung II und eine Geberdüse 32, deren Mündung 33 vor einem Greiferprojektil in Abschussstellung endet. Vom Projektil ist nur die Fadenklemme 34 gezeichnet. Die Geberdüse 32 wird über eine Leitung 35 mit Druckluft gespeist. Jeder Schussfaden, z.B. wiederum der Schussfaden 16, durchläuft die Öse 28, die Fadenmulde 26 im betreffenden Fadenspanner, die Öse 29 und einen der acht Schussfadenführungskanäle in der Geberdüse 32. Jeder Fadenspanner 25 wird gemäss Gewebemusterprogramm von einem zugehörigen Motor 37 synchron mit dem Fadenspanner 1 betätigt, so dass der ausgewählte Fadenspanner 25 zwischen einer ausgelenkten Lage 25' und einer Freigabelage 25" auf- und abbewegt wird.In Fig. 1, both clamping devices I and II are shown schematically. The weft thread device II has eight thread tensioners 25 in the form of a lever with a thread trough 26 which is rotatable about an axis 27. There is a thread eyelet 28 and 29 on both sides of each thread trough, which are attached to supports 30 and 31, respectively. Coming from the tensioning device I, the weft thread family 6 passes through the tensioning device II and a transmitter nozzle 32, the mouth 33 of which ends in the firing position in front of a gripper projectile. Only the thread clamp 34 is drawn from the projectile. The transmitter nozzle 32 is fed with compressed air via a line 35. Any weft, e.g. again the weft thread 16 passes through the eyelet 28, the thread trough 26 in the thread tensioner in question, the eyelet 29 and one of the eight weft thread guide channels in the donor nozzle 32. Each thread tensioner 25 is actuated synchronously with the thread tensioner 1 by an associated motor 37 in accordance with the fabric pattern program, so that the selected thread tensioner 25 is moved up and down between a deflected position 25 ′ and a release position 25 ″.

Die in Fig. 1 gezeichnete Lage ist für die folgende Erklärung der Arbeitsweise der Anordnung als Ausgangslage genommen. Alle Schussfäden sind durch die Fadenspanner 1 und 25 ausgelenkt. Die vom Querbalken 5 ausgelenkten Schussfäden werden von den Halteelementen 18 und 19 in dieser Lage festgehalten. Alle Schussfäden in beiden Spannvorrichtungen I und II sind durch das Ziehen der durch die Geberdüse 32 strömende Druckluft gespannt. Die Fadenklemme 34 ist geöffnet. Beim Eintragen des ausgewählten Schussfadens - es wird hierwiederum als Beispiel der Schussfaden 16 betrachtetschwingt zunächst der zugehörige Fadenspanner 25 im Uhrzeigersinn, so dass sich der Schussfaden frei durch die Zugkraft der Düse 32 in der Lage 16' strecken kann. Die Düse 32 bläst dabei das Ende 16" des Schussfadens in die Fadenklemme 34 des Projektils. Hierbei rückt der Schussfaden über eine Länge x vorwärts. Diese Länge wird hier als Übergabelänge bezeichnet. Die Fadenklemme 34 wird nun geschlossen. Die Lage ist wie in Fig. 4 gezeigt. Bei Anfang der Freigabebewegung des Fadenspanners 25 wurde gleichzeitig der Fadenspanner 1 der Fadenspannvorrichtung von der Steuerscheibe 4 angehoben. Die Halteelemente 18 und 19 halten jedoch den Faden 16 in der ausgelenkten Lage. Wenn die Übergabe des Schussfadens an die Fadenklemme 34 des Projektils beendet ist, hat der Fadenspanner 1 die Lage 1' erreicht. In diesem Zeitpunkt wird das Projektil durch einen Abschussmechanismus 38 in das Webfach geschossen. Dabei wird der Schussfaden 16 aus den Halteelementen 18 und 19 gezogen. Vor dem Abschuss des Projektils wurde die Fadenbremse 17 geöffnet, so dass der Schussfaden mit der erforderlichen Eintragslänge von der Vorratsspule abgezogen und in das Webfach eingetragen wird. Während der Anfangsphase des Abschusses bewegt die Steuerscheibe 4 den Fadenspanner 1 kontinuierlich weiter aufwärts, so dass der Schussfaden sich frei unter dem Einfluss der Zugkraft des Projektils 32 in die Lage 16" strecken kann. Die nicht einzutragenden Schussfäden bleiben in ihren Halteelementen geklemmt. Ebenso bleiben die entsprechenden Fadenspanner der Fadenspannvorrichtungen II der nicht einzutragenden Schussfäden in ihrer ausgelenkten Stellung. Nachdem das Projektil den Schussfaden durch das Webfach gezogen hat, wird es im Fangwerk abgebremst und daraufhin von einem Rückschieber etwas zurückgeschoben bis es die Ausstossstellung erreicht hat. Gleichzeitig wird der Fadenspanner 1 durch die Steuerscheibe 4 gesenkt, so dass der Schussfaden gestreckt bleibt. Eine Randfadenklemme auf beiden Seiten des Webfaches übernimmt den Schussfaden. Der Schussfaden wird schussseitig von einer Schere 39 durchgeschnitten und fangseitig vom Projektil durch Öffnen der Fadenklemme 34 freigegeben. Der Faden wird vom Riet angeschlagen. Der Schussfaden wird vom sich weiter senkenden Fadenspanner 1 und zusätzlich vom sich ebenfalls senkenden Fadenspanner 25 weiter ausgelenkt bis sein Ende innerhalb der Mündung 33 der Düse 32 liegt. Während sich der Fadenspanner 1 mit dem Schussfaden zur Tieflage bewegt, wird der Faden zwischen den Halteelementen 18 und 19 festgeklemmt. Eine Transportvorrichtung nimmt das aus dem Fangwerk ausgestossene Projektil auf und befördert es ausserhalb des Webfaches an die Abschussstelle zurück. Das Projektil wird vom Projektil- öffner geöffnet und gleichzeitig von einem Projektilheber vor die Düse 32 geschwenkt, so dass es bereit ist zum Aufnehmen des nächsten Schussfadens. Die Lage ist dann wiederum wie in Fig. 1.The position shown in Fig. 1 is taken as the starting point for the following explanation of the operation of the arrangement. All weft threads are deflected by thread tensioners 1 and 25. The weft threads deflected by the crossbar 5 are held in this position by the holding elements 18 and 19. All weft threads in both tensioning devices I and II are tensioned by pulling the compressed air flowing through the transmitter nozzle 32. The thread clamp 34 is open. When the selected weft thread is inserted - here again the weft thread 16 is considered as an example, the associated thread tensioner 25 first swings clockwise, so that the weft thread can stretch freely in position 16 'due to the tensile force of the nozzle 32. The nozzle 32 blows the end 16 "of the weft thread into the thread clamp 34 of the projectile. The weft thread moves forward over a length x. This length is referred to here as the transfer length. The thread clamp 34 is now closed. The position is as shown in FIG. 4. At the beginning of the release movement of the thread tensioner 25, the thread tensioner 1 of the thread tensioning device was simultaneously lifted from the control disk 4. However, the holding elements 18 and 19 hold the thread 16 in the deflected position, when the transfer of the weft thread to the thread clamp 34 of the projectile has ended the thread tensioner 1 has reached the position 1 '. At this point in time the projectile is shot into the shed by a firing mechanism 38. The weft thread 16 is pulled out of the holding elements 18 and 19. The thread brake 17 was opened before the projectile was fired , so that the weft with the required entry length is pulled off the supply spool and entered the shed will agen. During the initial phase of the launch, the control disk 4 continuously moves the thread tensioner 1 upward, so that the weft thread can stretch freely into the position 16 ″ under the influence of the tensile force of the projectile 32. The weft threads not to be entered remain clamped in their holding elements the corresponding thread tensioner of the thread tensioning devices II of the weft threads not to be inserted in their deflected position lowered by the control disk 4, so that the weft thread remains stretched. An edge thread clamp on both sides of the shed takes over the weft thread. The weft thread is cut through on the weft side by scissors 39 and released on the catch side by the projectile by opening the thread clamp 34. D the thread is struck by the reed. The weft thread is deflected further by the thread tensioner 1, which further lowers and additionally by the thread tensioner 25, which also lowers, until its end lies within the mouth 33 of the nozzle 32. While the thread tensioner 1 moves to the low position with the weft thread, the thread is clamped between the holding elements 18 and 19. A transport device picks up the projectile ejected from the trap and transports it back to the launch site outside the shed. The projectile is opened by the projectile opener and at the same time swung by a projectile lifter in front of the nozzle 32, so that it is ready to take up the next weft thread. The position is then again as in FIG. 1.

Fig. 5 zeigt ein Ausführungsbeispiel, wobei die Halteelemente 40 und 41 für die Schussfäden bis zu der Höhe der gestreckten Schussfäden 42' heranreichen oder gar etwas darüber hinaus. Solche lange Halteelemente bremsen den Schussfaden praktisch während seiner ganzen Steckbewegung. Durch die vom Schussfaden erfahrene Reibung geht das Strecken des Schussfadens beim Eintragungsvorgang gleichmässig und nicht ruckartig vor sich, so dass er nicht übermässig belastet wird.FIG. 5 shows an exemplary embodiment, the holding elements 40 and 41 for the weft threads reaching up to the height of the stretched weft threads 42 ′ or even slightly beyond. Such long holding elements brake the weft thread practically during its entire insertion movement. Due to the friction experienced by the weft thread, the weft thread is stretched evenly and not jerkily during the entry process, so that it is not excessively stressed.

Bei dem Ausführungsbeispiel nach Fig. 6 besteht die Anordnung aus einer ersten Spannvorrichtung 111 mit einem Fadenspanner 44 und einer zweiten Spannvorrichtung IV. Die Spannvorrichtung IV besitzt für jeden Schussfaden einen Fadenspanner 45 in der Form eines Doppelhebels, der um einen Fixpunkt 46 drehbar ist und an seinem freien Ende mit einer Fadenöse 47 für den Schussfaden versehen ist. Das andere Ende des Fadenspanners 45 ist mit einer Stellstange 48 eines Stellmotors 49 verbunden. Die erste Spannvorrichtung 111 und die Spannvorrichtung IV haben somit die Fadenösen 47 gemeinsam. Die Anordnung arbeitet in der Weise, dass die Übergabe des einzutragenden Schussfadens 50 an die Fadenklemme des Projektils stattfindet durch eine Drehung im Gegenuhrzeigersinn des Fadenspanners 45, so dass sein Teil 45' den Schussfaden mittels der Fadenöse 47 von der Lage 47' nach rechts in die Lage 47" verlegt. Es findet somit eine Teilstreckung bzw. Vorwärtsbewegung des Schussfadens statt, so dass die Fadenlänge x zum Übergeben an das Projektil freigegeben wird. Nach dem Eintragen werden beim Rückschieben des Projektils bzw. nach dem schussseitigen Abschneiden des Schussfadens die Spannvorrichtung 111 und IV in ihre Auslenkstellungen zurückgeschwenkt.6, the arrangement consists of a first tensioning device 111 with a thread tensioner 44 and a second tensioning device IV. The tensioning device IV has a thread tensioner 45 in the form of a double lever for each weft thread, which is rotatable about a fixed point 46 and on its free end is provided with a thread eyelet 47 for the weft thread. The other end of the thread tensioner 45 is connected to an actuating rod 48 of an actuating motor 49. The first tensioning device 111 and the tensioning device IV thus have the thread eyelets 47 in common. The arrangement works in such a way that the transfer of the weft thread 50 to be inserted to the thread clamp of the projectile takes place by a counterclockwise rotation of the thread tensioner 45, so that its part 45 ′ moves the weft thread from the position 47 ′ to the right into the position 47 ′ by means of the thread eyelet Layer 47 ". There is thus a partial stretching or forward movement of the weft thread, so that the thread length x is released for transfer to the projectile. After the insertion, when the projectile is pushed back or after the weft thread is cut off, the tensioning device 111 and IV pivoted back into its deflected positions.

Bei dem Ausführungsbeispiel nach Fig. 7 ist ein Drehpunkt 55 eines Fadenspanners 56 einer Spannvorrichtung V so gewählt, dass die Fadenöse 57 des Fadenspanners am Ende der Freigabebewegung der Spannvorrichtung in einer Lage 57' unterhalb einer Geberdrüse 58 liegen. Dies hat den Vorteil, dass die Unterseite der Eingänge 59 der Schussfadenkanäle in der Geberdrüse 58 Fadenführer bilden.In the exemplary embodiment according to FIG. 7, a pivot point 55 of a thread tensioner 56 of a tensioning device V is selected such that the thread eyelet 57 of the thread tensioner lies in a position 57 'below a transmitter gland 58 at the end of the release movement of the tensioning device. This has the advantage that the underside of the entrances 59 of the weft thread channels in the donor gland 58 form thread guides.

Beim Ausführungsbeispiel nach Fig. 8 weist eine Spannvorrichtung VI für jeden Schussfaden einerseits drei Umlenkkörper 65, 66 und 67 unterhalb eines Schussfadens 68 auf und anderseits zwei Umlenkkörper 69 und 70, die an einer Stellstange 71 eines Stellmotors 72 befestigt sind. In der Ausgangslage befinden sich die Umlenkkörper 69 und 70 jeweils zwischen den Umlenkkörpern 65, 66 bzw. 67, so dass zwei Schlaufen 73 und 74 gebildet sind und das Schussfadenende 68 in der Mündung einer Geberdüse 75 liegt. Zum Übergeben des Schussfadens an eine Fadenklammer 76 des Greiferprojektils wird die Stellstange 71 aus der Tieflage 71' vom Stellmoter 72 angehoben, so dass die beiden Schlaufen 73 und 74 sich strecken und gesamt die Übergabelänge x an das Projektil ergeben. Beim Zurückschieben des Projektils bzw. nach schussseitigem Abschneiden des Schussfadens werden beide Spannvorrichtungen in ihre Auslenkstellung zurückgeschwenkt.In the exemplary embodiment according to FIG. 8, a tensioning device VI for each weft thread has on the one hand three deflecting bodies 65, 66 and 67 below a weft thread 68 and on the other hand two deflecting bodies 69 and 70 which are fastened to an actuating rod 71 of an actuating motor 72. In the starting position, the deflection bodies 69 and 70 are located between the deflection bodies 65, 66 and 67, respectively, so that two loops 73 and 74 are formed and the weft thread end 68 lies in the mouth of a donor nozzle 75. In order to transfer the weft thread to a thread clip 76 of the gripper projectile, the actuating rod 71 is raised from the low position 71 'by the servomotor 72, so that the two loops 73 and 74 stretch and give a total of the transfer length x to the projectile. When the projectile is pushed back or after the weft thread has been cut off, both tensioning devices are pivoted back into their deflected position.

Fig. 9 zeigt ein Ausführungsbeispiel einer Anordnung zum Eintragen der Schussfäden im Zweischuss- bzw. Mischwechselbetrieb, wobei zwei Schussfäden abwechselnd bzw. abwechselnd nach einem bestimmten Musterprogramm eingetragen werden. Es ist für jeden Schussfaden 85 bzw. 86 eine Eintragsvorrichtung vorgesehen. Die Eintragsvorrichtung 87 für den Schussfaden 85 besteht aus einer Spannvorrichtung VII und einer Spannvorrichtung VIII. Die Eintragsvorrichtung 88 für den Schussfaden 86 besteht aus einer Spannvorrichtung IX und einer Spannvorrichtung X. Beide Eintragsvorrichtungen 87 und 88 arbeiten abwechselnd bzw. musterprogrammgemäss jeweils wie vorher für die anderen Ausführungsformen beschrieben. Die Spannbewegung der Schussfädenabschnitte 85' und 86' in der Spannvorrichtung VIII und X erfolgen unter dem Einfluss eines im Maschinenrhythmus quer zu den beiden Schussfäden schwingenden gemeinsamen Fadenspanners 89.9 shows an exemplary embodiment of an arrangement for inserting the weft threads in two-weft or mixed-change operation, two weft threads alternating or alternating be entered according to a specific sample program. An insertion device is provided for each weft thread 85 or 86. The insertion device 87 for the weft thread 85 consists of a tensioning device VII and a tensioning device VIII. The insertion device 88 for the weft thread 86 consists of a tensioning device IX and a tensioning device X. Both entry devices 87 and 88 work alternately or according to the pattern program as before for the others Embodiments described. The tensioning movement of the weft thread sections 85 'and 86' in the tensioning device VIII and X take place under the influence of a common thread tensioner 89 which vibrates transversely to the two weft threads in the machine rhythm.

Obschon die Erfindung hier für GreiferprojektilWebmaschinen beschrieben ist, ist sie selbstverständlich auch verwendbar auf Webmaschinen mit einem anderen Eintragungsorgan.Although the invention is described here for rapier projectile weaving machines, it can of course also be used on weaving machines with another entry organ.

Auch kann die Anordnung um 180° gedreht sein, d.h. die Fadenauslenkung geschieht nach oben statt nach unten.The arrangement can also be rotated by 180 °, i.e. the thread deflection occurs upwards instead of downwards.

Claims (10)

1. An arrangement for picking at least one weft yarn, of use for weaving machines, more particularly gripper projectile weaving machines, the arrangement having a first weft yarn tensioning device and a weft yarn transfer device for retaining the weft yarn until the transfer thereof to a picking device, characterised in that the first tensioning device (I; II VII; IX) is followed by a second tensioning device (II; IV; V; VI; VIII; X) whose yarn-tensioning length is equal to the transfer length (x) of the weft yarn (16) to the picking device (34) and which releases a part of the weft yarn, of a length equal to the transfer length, for transfer to the picking device before the first tensioning device releases the weft yarn for picking and which pulls back an equally long part of the weft yarn after picking.
2. An arrangement according to claim 1, characterised in that the first tensioning device (1) has a yarn tensioner (1) which oscillates at the cadence of the machine and which has a bar (5) disposed transversely of the weft yarns (6), the bar executing, between yarn guides (13, 14) disposed on either side of it, a deflecting movement for the weft yarns in one direction and a release movement for the weft yarns in the other direction; the first tensioning device has retaining elements (18, 19) for each weft yarn (16) to retain the weft yarns in the deflected position and to release them for picking; and the second tensioning device (II) has for each weft yarn a yarn tensioner (25) which executes, between two yarn guides (28, 29) and transversely to the weft yarn, a deflecting movement for the weft yarns in one direction and a release movement for the weft yarns in the other direction.
3. An arrangement according to claim 2, characterised in that the yarn tensioners (71 of the second tensioning device (VI) have at least two deflectors (69, 70) each adapted to engage between two deflectors (65-67) disposed on the other side of the weft yarn (68), in order to form a loop (73, 74).
4. An arrangement according to claim 1, characterised in that the first tensioning device (III) has a tensioner (44) which oscillates at the cadence of the machine and which has a bar extending transversely to the weft yarns, the bar executing, between two yarn guides disposed on either side of the bar, a weft yarn deflecting movement in one direction and a release movement for the weft yarns in the opposite direction; the first tensioning device has a retaining element for each weft yarn to retain the weft yarns in the deflected position and to release them for picking; and the second tensioning device (IV) has for each weft yarn (45) a tensioner (45) which has a yarn guide (47) and which moves parallel to the weft yarns to execute a deflecting movements for the weft yarns in one direction and a release movement for the weft yarns in the other direction.
5. An arrangement according to claim 4, characterised in that the first and second tensioning devices (V) have their contiguous yarn guides (57) in common and the same are disposed on the tensioners (56) of the second tensioning device.
6. An arrangement according to claim 4 or 5, characterised in that the moving yarn guides (57) are disposed below the transfer device (58) at the end of their release movement.
7. An arrangement according to any of claims 1-5, characterised in that the second tensioning device (II; IV; V; VI; VIII; X) operates in synchronism with the first tensioning device (I; III; VII; IX) at least during the release movement.
8. An arrangement according to claim 1 in two- weft or weft-mixing operations, characterised in that the two tensioning devices (VII; VIII; IX; X) are provided for each weft yarn (85, 86) and both operate alternately or in accordance with a pattern programme.
9. An arrangement according to claim 8, characterised in that the two second tensioning devices (VIII, X) have a common tensioner (89) which oscillates at the cadence of the machine transversely to the weft yarns.
10. An arrangement according to any of claims 2-7, characterised in that the retaining elements (40, 41) extend at least as fear as the height of the stretched weft yams (42').
EP85100856A 1985-01-28 1985-01-28 Arrangement for the insertion of at least one weft thread into looms Expired EP0189497B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE8585100856T DE3564596D1 (en) 1985-01-28 1985-01-28 Arrangement for the insertion of at least one weft thread into looms
EP85100856A EP0189497B1 (en) 1985-01-28 1985-01-28 Arrangement for the insertion of at least one weft thread into looms
US06/817,423 US4649965A (en) 1985-01-28 1986-01-09 Picking arrangement for a weaving machine
SU864007952A SU1454260A3 (en) 1985-01-28 1986-01-17 Device for laying at least one weft thread on shuttlless loom, particularly, with microlayers
JP61011231A JPS61174446A (en) 1985-01-28 1986-01-23 Wefting mechanism of loom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85100856A EP0189497B1 (en) 1985-01-28 1985-01-28 Arrangement for the insertion of at least one weft thread into looms

Publications (2)

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EP0189497A1 EP0189497A1 (en) 1986-08-06
EP0189497B1 true EP0189497B1 (en) 1988-08-24

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EP85100856A Expired EP0189497B1 (en) 1985-01-28 1985-01-28 Arrangement for the insertion of at least one weft thread into looms

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US (1) US4649965A (en)
EP (1) EP0189497B1 (en)
JP (1) JPS61174446A (en)
DE (1) DE3564596D1 (en)
SU (1) SU1454260A3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1003558A3 (en) * 1989-09-19 1992-04-21 Picanol Nv BLOW device for weft threads in weaving machines.
DE59304128D1 (en) * 1993-03-26 1996-11-14 Rueti Ag Maschf Method for influencing the movement of a weft thread to be drawn off from a supply spool and running against a weft insertion device of a weaving machine and weaving machine for carrying out the method
WO2017081711A1 (en) * 2015-11-11 2017-05-18 P.T.M.T. S.R.L Controlled system for supplying weft yarn in a loom
ITUB20155496A1 (en) * 2015-11-11 2017-05-11 Pezzoli Miria CONTROLLED PLOT WIRE FEED SYSTEM IN A FRAME

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB353764A (en) * 1929-09-23 1931-07-30 Teeag Textil Finanz A G Improvements in looms with nipping shuttles
US2589429A (en) * 1945-11-24 1952-03-18 Sulzer Ag Device for tensioning the weft thread in looms
FR1260351A (en) * 1960-06-16 1961-05-05 Sulzer Ag Weft material tensioning device to be inserted into the shed
SU589305A1 (en) * 1976-03-01 1978-01-25 Чебоксарский Машиностроительный Завод Weft thread compensator for shuttleless loom
FR2466548A1 (en) * 1979-09-27 1981-04-10 Cretin Louis Atel Shuttleless loom weft withdrawal device - cuts down weft losses at selvedges
CH654601A5 (en) * 1982-04-07 1986-02-28 Sulzer Ag Weft thread tensioning device for weaving machines, especially gripper pojectile weaving machines.

Also Published As

Publication number Publication date
US4649965A (en) 1987-03-17
JPS61174446A (en) 1986-08-06
SU1454260A3 (en) 1989-01-23
DE3564596D1 (en) 1988-09-29
EP0189497A1 (en) 1986-08-06

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