EP0644286B1 - Arrangement to feed weft yarns - Google Patents

Arrangement to feed weft yarns Download PDF

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Publication number
EP0644286B1
EP0644286B1 EP93810659A EP93810659A EP0644286B1 EP 0644286 B1 EP0644286 B1 EP 0644286B1 EP 93810659 A EP93810659 A EP 93810659A EP 93810659 A EP93810659 A EP 93810659A EP 0644286 B1 EP0644286 B1 EP 0644286B1
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EP
European Patent Office
Prior art keywords
clamping
weft
reference plane
arrangement according
order
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
EP93810659A
Other languages
German (de)
French (fr)
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EP0644286A1 (en
Inventor
Angelo Stacher
Theo Thalmann
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
Maschinenfabrik Rueti AG
Original Assignee
Sultex AG
Maschinenfabrik Rueti 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.)
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8215031&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0644286(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sultex AG, Maschinenfabrik Rueti AG filed Critical Sultex AG
Priority to DE59306205T priority Critical patent/DE59306205D1/en
Priority to EP93810659A priority patent/EP0644286B1/en
Priority to US08/289,824 priority patent/US5492153A/en
Priority to JP21892694A priority patent/JP3413809B2/en
Publication of EP0644286A1 publication Critical patent/EP0644286A1/en
Application granted granted Critical
Publication of EP0644286B1 publication Critical patent/EP0644286B1/en
Anticipated expiration legal-status Critical
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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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/125—Weft holding devices
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/38—Weft pattern mechanisms

Definitions

  • the invention relates to an arrangement for presenting weft threads for a rapier weaving machine according to the preamble of claim 1, and a rapier weaving machine with such an arrangement.
  • EP-A 421 349 describes a device which has two clamping points and, in the manner of a mixed changer, after the transfer of the weft thread to the gripper, provides the relevant clamping point for receiving the inserted weft thread and then clamps the weft thread, the clamping points above or below are arranged below the tissue plane.
  • a first guide element with a slot is provided, through which the weft threads are guided from the weft thread feeders to the clamping points. Because the weft threads are guided in the same plane but are clamped at different levels on both sides of this plane, the weft threads come into contact or cross in the slot or in the path of the weft threads the clamping points and the weft feeders. This is a disadvantage.
  • the slot is widened at the end in order to prevent the weft thread from being carried along.
  • the weft thread is taken over by the gripper, it is pulled over the edge formed by the extension, which leads to weft thread breaks.
  • the paths of the weft threads can cross.
  • weft threads For the presentation of a plurality of weft threads, e.g. four such devices are provided, which are arranged in an upper or lower position and each can be moved up and down individually in order to shift the respective device into a forward position.
  • the shifting of the device extends the period between two weft thread patterns, which undesirably limits the working speed and the number of weft threads that can be placed.
  • each device has a thread guide, the weft threads in each device are displaced with respect to the fabric plane, so that each has an excess length, which leads to crossings of the weft threads.
  • ribbon-shaped metal thread composite material Lix
  • the invention seeks to remedy this.
  • the invention as characterized in the claims solves the problem of creating an arrangement for the insertion of weft threads, so that avoiding the disadvantages mentioned a selective presentation of the weft threads at high Working speed of the loom is guaranteed, and in which the space required for the presentation of the weft thread to be entered is limited to a minimum.
  • the distance between the clamping points is at least 1 mm and an actuating device in the form of a stepper motor is used.
  • an actuating device in the form of a stepper motor is used.
  • US-A-3,921,678 describes a device for selecting a weft thread.
  • This device contains a plate with a slit-shaped opening, with a recess and with a passage opening connecting the opening and the recess, a movable lock for closing the passage opening, a slide with recesses open on one side for receiving the weft threads and for holding the weft threads within the recess and a plunger for ejecting a selected weft thread into the slit-like opening, when the movable barrier of the passage opening is released.
  • weft threads are guided from a weft thread spool to the recesses which are open on one side and are only inserted into them.
  • the holder of the weft thread is therefore essentially dependent on the weft thread tension. Due to tension fluctuations, weft loosening occurs, which leads to misalignment of the weft threads and formation of squeegees.
  • the weft thread is ejected into the recess by the slider and left there, while the barrier closes the passage opening.
  • the weft thread lies freely in the recess before being taken over by a gripper (FIG. 2).
  • the weft thread is thus kept in the correct position. Since this holding does not take place in the device, other means must be provided, which are not described, however. It is a so-called color monitor.
  • the end of the weft thread is held at the clamping point.
  • the weft is aligned to the fabric level by the coordinated movement.
  • the device according to the invention thus also has a positioning function.
  • the arrangement shown in Fig. 1 consists essentially of a known weft sequence control (not shown) with six weft feeders 1, a controlled thread clamp 2 with six clamping points 3a to 3f and a guide member 4 with a slot 5.
  • the arrangement is in a rapier weaving machine mounted in such a way that the clamping points lie one above the other with respect to the tissue plane, which is referred to below as the reference plane 6, and the slot 5 is arranged in the reference plane 6.
  • the guide member 4 has a recess 7 into which the slot 5 opens.
  • the weft feeders 1 are staggered so that the guide openings A to F have a different height with respect to the reference plane 6. With the arrangement, six weft threads 8a to 8f are presented. Each weft thread feeder 1 is assigned to a clamping point 3a to 3f such that each weft thread is guided from the clamping point holding the weft thread through the recess 7 to the guide openings A to F essentially parallel and without crossing. Furthermore, there is an adjusting device 9 around the clamping points 3a to 3f with respect to the reference plane 6 and a device 10 for canceling a selected clamping point is provided.
  • the actuating device 9 is a stepper motor which is connected to the weaving machine with a control device (not shown) and is controlled in accordance with a weaving program.
  • the device 10 is, for example, an electromagnet which is fed from the firing sequence control. It is pointed out that instead of the magnet, a lever arrangement can be provided which is coupled to the weft sequence control device.
  • the thread clamp 2 contains a holder 11, seven clamping bodies 12, an actuator 13, two compression springs 14, two snap rings 15, a pin 16 and an opening element 17.
  • the holder 11 is U-shaped and has a through hole 22 with a square cross section in its legs 21 and an elongated hole 24 in its base section 23.
  • the clamping bodies 12 are essentially cuboid and have a through hole 25 with a square cross section.
  • the clamping bodies are wedge-shaped at the ends in order to facilitate the insertion of the weft thread or the opening member 17.
  • the actuator 13 is rod-shaped and has a section 26 with a square cross section and a second section 27 with a round cross section.
  • the actuating element 13 is arranged in the legs 21 in the direction of the double arrow A so as to be displaceable.
  • the seven clamping bodies 12, which form the six clamping points 3a to 3f, are arranged on the first section 26.
  • the clamping bodies are designed so that the clamping points are at a distance of, for example, 3 mm.
  • the middle clamp is firmly connected to the actuator 13 by means of the pin 16 and three clamping bodies are arranged displaceably on each side of the fixed clamping body.
  • Compression springs 14 are arranged on both sides of the clamping bodies 12, which rest on the one hand on the snap rings 15 and on the other hand on the outer clamping bodies 12 and press the latter against one another.
  • the actuator 13 is coupled to the actuator 9.
  • the opening element 17 is arranged in the slot 24 in the direction of the double arrow B and is coupled to the device 10.
  • the thread clamp 2 and the guide member 4 are connected to one another and form a functional unit.
  • This functional unit is mounted in the rapier weaving machine by means not shown.
  • the thread clamp 2 is arranged at a predetermined distance with respect to the fabric edge 31 such that the clamping points 3 are each aligned with the compartment tip 32.
  • a symbolically illustrated cutting device 33 is arranged between the thread clamp 2 and the fabric edge 31 (FIG. 5). The mode of operation of the arrangement is described below, the arrangement being brought from the position shown in FIG. 1 to the position shown in FIG. 4, in which the weft thread 8a is presented to the hook 35.
  • the weft thread template is composed of two processes, namely the pivoting of the weft thread feeder 1 in the direction of the reference plane 6 and the displacement of the clamping point 3a into the reference plane 6.
  • the weft threads 8a to 8f are guided without crossings between the clamping points and the guide openings. This state is maintained when the weft thread feeder is pivoted.
  • the displacement of the nip 3a in the reference plane 6 ensures that the weft thread 8a is arranged in the reference plane 6 and is already inserted into the slot 5 due to the tensile stress acting on the thread. (Fig. 5).
  • the weft thread 8a Due to this spatial separation of the weft thread 8a from the other weft threads, there is no contact between them when the weft thread is taken over by the gripper 35. After the weft thread 8a has been taken over by the gripper 35, the weft thread end is peeled out of the clamping point 3a and drawn into the shed. During the pulling in of the weft thread 8a, the clamping point 3a is released by the opening member 17 by inserting it between the clamping bodies 12, which form the clamping point 3a. A gap between the clamping bodies 12 is simultaneously formed by this opening member. The weft thread 8a drawn in is inserted into this gap again when struck by the reed (not shown).
  • the weft thread feeder 1 is again in the position shown with dashed lines.
  • the weft 8a is guided through the inlet gap into the slot 5, the weft 8a being guided on the top of the slot 5 due to the position of the weft feeder 1.
  • the weft thread is introduced into the gap between the clamping bodies 12 in a spatially separated manner from the other weft threads.
  • the clamping point is re-established due to the spring force and the weft thread is held in the clamping point.
  • the inserted weft thread is cut by means of the cutting device 33. This provides the weft for a new entry.

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

Description

Die Erfindung betrifft eine Anordnung zum Vorlegen von Schussfäden für eine Greiferwebmaschine gemäss dem Oberbegriff des Anspruches 1, sowie eine Greiferwebmaschine mit einer derartigen Anordnung.The invention relates to an arrangement for presenting weft threads for a rapier weaving machine according to the preamble of claim 1, and a rapier weaving machine with such an arrangement.

In der EP-A 421 349 ist eine Vorrichtung, beschrieben die zwei Klemmstellen aufweist und nach Art eines Mischwechslers nach der Übergabe des Schussfadens an den Greifer die betreffende Klemmstelle zur Aufnahme des eingetragenen Schussfadens bereitstellt und anschliessend den Schussfaden klemmt, wobei die Klemmstellen ober- bzw. unterhalb der Gewebeebene angeordnet sind. Es ist ein erstes Führungsorgan mit einem Schlitz vorgesehen, durch welchen die Schussfäden von den Schussfadenvorlegern zu den Klemmstellen geführt sind. Dadurch, dass die Schussfäden in der gleichen Ebene geführt aber beidseits dieser Ebene auf unterschiedlichen Niveaus geklemmt sind, tritt eine Berührung bzw. ein Verkreuzen der Schussfäden im Schlitz bzw. in der Laufbahn der Schussfäden zwischen den Klemmstellen und den Schussfadenvorlegern auf. Dies ist ein Nachteil. Bei einer Ausführungsform der Vorrichtung ist der Schlitz am Ende erweitert, um das Mitreissen des Schussfadens zu verhindern. Bei der Übernahme des vorgelegten Schussfadens durch den Greifer wird dieser über die durch die Erweiterung gebildete Kante gezogen, was zu Schussfadenbrüchen führt. Ausserdem können sich die Laufbahnen der Schussfäden kreuzen. Dies sind weitere Nachteile.EP-A 421 349 describes a device which has two clamping points and, in the manner of a mixed changer, after the transfer of the weft thread to the gripper, provides the relevant clamping point for receiving the inserted weft thread and then clamps the weft thread, the clamping points above or below are arranged below the tissue plane. A first guide element with a slot is provided, through which the weft threads are guided from the weft thread feeders to the clamping points. Because the weft threads are guided in the same plane but are clamped at different levels on both sides of this plane, the weft threads come into contact or cross in the slot or in the path of the weft threads the clamping points and the weft feeders. This is a disadvantage. In one embodiment of the device, the slot is widened at the end in order to prevent the weft thread from being carried along. When the weft thread is taken over by the gripper, it is pulled over the edge formed by the extension, which leads to weft thread breaks. In addition, the paths of the weft threads can cross. These are other disadvantages.

Zur Vorlage einer Mehrzahl von Schussfäden, z.B. vier sind zwei derartige Vorrichtungen vorgesehen, die in einer oberen bzw. unteren Stellung angeordnet und jede für sich auf und ab bewegbar sind, um die jeweilige Vorrichtung in eine Vorlegestellung zu verlagern. Insbesondere durch die Verlagerung der Vorrichtung wird der Zeitraum zwischen zwei Schussfadenvorlagen verlängert, wodurch die Arbeitsgeschwindigkeit und die Anzahl der vorlegbaren Schussfäden in unerwünschter Weise eingeschränkt wird. Dadurch, dass jede Vorrichtung eine Fadenführung aufweist, werden die Schussfäden in jeder Vorrichtung bezüglich der Gewebeebene verlagert, so dass jeder eine Überschusslänge aufweist, die zu Verkreuzungen der Schussfäden führt. Insbesondere bei bändchenförmigem Metallfaden-Verbundmaterial (Lurex), hochgedrehten Kreppgarnen, Mikrofasern, usw. treten Krangel auf.For the presentation of a plurality of weft threads, e.g. four such devices are provided, which are arranged in an upper or lower position and each can be moved up and down individually in order to shift the respective device into a forward position. In particular, the shifting of the device extends the period between two weft thread patterns, which undesirably limits the working speed and the number of weft threads that can be placed. Because each device has a thread guide, the weft threads in each device are displaced with respect to the fabric plane, so that each has an excess length, which leads to crossings of the weft threads. Especially in the case of ribbon-shaped metal thread composite material (Lurex), twisted crepe yarns, microfibers, etc., cranks occur.

Da die zwei Vorrichtungen nach dem Prinzip eines Mischwechslers arbeiten, ist für die Vorlage einer Mehrzahl von Schussfäden der apparative Aufwand und der Raumbedarf gross, was einen weiteren Nachteil darstellt.Since the two devices work on the principle of a mix changer, the outlay in terms of equipment and the space required for the presentation of a plurality of weft threads is great, which represents a further disadvantage.

Hier will die Erfindung Abhilfe schaffen. Die Erfindung wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, eine Anordnung zum Vorlegen von Schussfäden zu schaffen, so dass unter Vermeidung der genannten Nachteile eine selektive Vorlage der Schussfäden bei hoher Arbeitsgeschwindigkeit der Webmaschine gewährleistet ist, und bei welcher der für die Vorlage des einzutragenen Schussfadens benötigte Raumbedarf auf ein Minimum beschränkt ist.The invention seeks to remedy this. The invention as characterized in the claims solves the problem of creating an arrangement for the insertion of weft threads, so that avoiding the disadvantages mentioned a selective presentation of the weft threads at high Working speed of the loom is guaranteed, and in which the space required for the presentation of the weft thread to be entered is limited to a minimum.

Dadurch, dass die Zuordnung der Schussfadenvorleger zu den Klemmstellen kreuzungsfreie Laufbahnen der Schussfäden gewährleistet und die Verlagerung der Klemmstellen in die Bezugsebene diese Laufbahnen unbeeinflusst lässt, wird durch eine Abstimmung der Bewegungen der Klemmstelle und des zugeordneten Schussfadenvorlegers der Schussfaden in der Bezugsebene dem Greifer vorgelegt, wobei mit Vorteil die Klemmstelle zeitlich vor dem Schussfadenvorleger in die Bezugsebene verstellt wird, um den Schussfaden in den Schlitz des Führungsorgans zu verlagern und eine Berührung zwischen den Schussfäden zu verhindern.The fact that the assignment of the weft thread feeder to the clamping points ensures cross-free raceways of the weft threads and the displacement of the clamping points in the reference plane does not affect these raceways, by coordinating the movements of the clamping point and the assigned weft thread feeder, the weft thread is presented to the hook in the reference plane, whereby advantageously, the clamping point is adjusted in time in front of the weft feeder in the reference plane in order to shift the weft thread into the slot of the guide member and to prevent contact between the weft threads.

Es ist von Vorteil, wenn der Abstand der Klemmstellen mindestens 1 mm beträgt und eine Stelleinrichtung in Form eines Schrittmotors verwendet wird. Dadurch können die Stellzeiten verkürzt werden, so dass bei hohen Arbeitsgeschwindigkeiten der Webmaschine sechs und mehr Schussfäden vorgelegt werden können.It is advantageous if the distance between the clamping points is at least 1 mm and an actuating device in the form of a stepper motor is used. As a result, the positioning times can be shortened, so that six or more weft threads can be presented to the weaving machine at high working speeds.

In der US-A-3,921,678 ist eine Vorrichtung zur Auswahl eines Schussfadens beschrieben. Diese Vorrichtung enthält eine Platte mit einer schlitzförmigen Oeffnung, mit einer Ausnehmung und mit einer die Oeffnung und die Ausnehmung verbindenden Durchtrittsöffnung, eine bewegliche Sperre zum Verschliessen der Durchtrittsöffnung, einen Schieber mit einseitig offenen Ausnehmungen zur Aufnahme der Schussfäden und zum Halten der Schussfäden innerhalb der Ausnehmung und einen Stössel zum Ausstossen eines ausgewählten Schussfadens in die schlitzartige Oeffnung, wenn die bewegliche Sperre der Durchtrittsöffnung aufgehoben ist.US-A-3,921,678 describes a device for selecting a weft thread. This device contains a plate with a slit-shaped opening, with a recess and with a passage opening connecting the opening and the recess, a movable lock for closing the passage opening, a slide with recesses open on one side for receiving the weft threads and for holding the weft threads within the recess and a plunger for ejecting a selected weft thread into the slit-like opening, when the movable barrier of the passage opening is released.

Die Schussfäden sind von einer Schussfadenspule zu den einseitig offenen Ausnehmungen geführt und in diese lediglich eingelegt. Die Halterung des Schussfadens ist somit im wesentlichen von der Schussfadenspannung abhängig. Aufgrund von Spannungsschwankungen tritt eine Lockerung der Schussfäden auf, die zu Verlagerung der Schussfäden und Bildung von Krangeln führt.The weft threads are guided from a weft thread spool to the recesses which are open on one side and are only inserted into them. The holder of the weft thread is therefore essentially dependent on the weft thread tension. Due to tension fluctuations, weft loosening occurs, which leads to misalignment of the weft threads and formation of squeegees.

Zum Eintragen wird der Schussfaden durch den Schieber in die Ausnehmung ausgestossen und dort belassen, während die Sperre die Durchtrittsöffnung schliesst. Der Schussfaden liegt vor der Uebernahme durch einen Greifer frei in der Ausnehmung (Fig. 2).For insertion, the weft thread is ejected into the recess by the slider and left there, while the barrier closes the passage opening. The weft thread lies freely in the recess before being taken over by a gripper (FIG. 2).

Gemäss Beschreibung sei somit der Schussfaden in der korrekten Stellung gehalten. Da dieses Halten nicht in der Vorrichtung erfolgt, müssen andere Mittel vorgesehen werden, welche jedoch nicht beschrieben sind. Es handelt sich hierbei um einen sogenannten Farbwächter.According to the description, the weft thread is thus kept in the correct position. Since this holding does not take place in the device, other means must be provided, which are not described, however. It is a so-called color monitor.

Demgegenüber wird bei der erfindungsgemässen Anordnung das Ende des Schussfadens an der Klemmstelle gehalten. Der Schussfaden wird durch die koordinierte Bewegung auf die Gewebeebene ausgerichtet. Dadurch herrschen die gleichen Bedingungen unabhängig davon, welcher Schussfaden vorgelegt wird. Die erfindungsgemässe Vorrichtung hat somit neben der Auswahlfunktion auch eine Positionierungsfunktion.In contrast, in the arrangement according to the invention, the end of the weft thread is held at the clamping point. The weft is aligned to the fabric level by the coordinated movement. As a result, the same conditions prevail regardless of which weft thread is presented. In addition to the selection function, the device according to the invention thus also has a positioning function.

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

Im folgenden wird die Erfindung anhand der beiliegenden Zeichnungen erläutert.The invention is explained below with reference to the accompanying drawings.

Es zeigen:

Fig. 1,
eine schematisch dargestellte Ausführungsform einer erfindungsgemässen Anordnung,
Fig. 2,
eine bevorzugte Ausführungsform einer gesteuerten Fadenklemme in auseinander gezogener Darstellung,
Fig. 3,
die Fadenklemme nach Fig. 2 im montierten Zustand,
Fig. 4
die Anordnung nach Fig. 1 in der Betriebsstellung beim Vorlegen eines Schussfadens und
Fig. 5
einen Ausschnitt der Anordnung nach Fig. 4 aus der Richtung der Schussfadenvorleger gesehen.
Show it:
Fig. 1
1 shows a schematically illustrated embodiment of an arrangement according to the invention,
Fig. 2,
a preferred embodiment of a controlled thread clamp in an exploded view,
Fig. 3,
2 in the assembled state,
Fig. 4
the arrangement of FIG. 1 in the operating position when presenting a weft and
Fig. 5
a section of the arrangement of FIG. 4 seen from the direction of the weft feeder.

Die in Fig. 1 dargestellte Anordnung besteht im wesentlichen aus einer an sich bekannten Schussfolgesteuerung (nicht dargestellt) mit sechs Schussfadenvorlegern 1, einer gesteuerten Fadenklemme 2 mit sechs Klemmstellen 3a bis 3f und einem Führungsorgan 4 mit einem Schlitz 5. Die Anordnung ist in einer Greiferwebmaschine so montiert, dass die Klemmstellen bezüglich der Gewebeebene, die nachfolgend als Bezugsebene 6 bezeichnet wird, übereinander liegen und der Schlitz 5 in der Bezugsebene 6 angeordnet ist. Das Führungsorgan 4 weist eine Ausnehmung 7 auf, in welche der Schlitz 5 mündet.The arrangement shown in Fig. 1 consists essentially of a known weft sequence control (not shown) with six weft feeders 1, a controlled thread clamp 2 with six clamping points 3a to 3f and a guide member 4 with a slot 5. The arrangement is in a rapier weaving machine mounted in such a way that the clamping points lie one above the other with respect to the tissue plane, which is referred to below as the reference plane 6, and the slot 5 is arranged in the reference plane 6. The guide member 4 has a recess 7 into which the slot 5 opens.

Die Schussfadenvorleger 1 sind gestaffelt angeordnet, so dass die Führungsöffnungen A bis F eine unterschiedliche Höhe bezüglich der Bezugsebene 6 aufweisen. Mit der Anordung werden sechs Schussfäden 8a bis 8f vorgelegt. Jeder Schussfadenvorleger 1 ist einer Klemmstelle 3a bis 3f zugeordnet, derart, dass jeder Schussfaden von der den Schussfaden haltenden Klemmstelle durch die Ausnehmung 7 zu den Führungsöffnungen A bis F im wesentlichen parallel und kreuzungsfrei geführt ist. Ferner sind eine Stelleinrichtung 9, um die Klemmstellen 3a bis 3f bezüglich der Bezugsebene 6 zu verschieben und eine Einrichtung 10 zum Aufheben einer selektionierten Klemmstelle vorgesehen. Die Stelleinrichtung 9 ist ein Schrittmotor, der mit einer nicht dargestellten Steuereinrichtung mit der Webmaschine verbunden ist und entsprechend einem Webprogramm angesteuert wird. Die Einrichtung 10 ist z.B. ein Elektromagnet, welches aus der Schussfolgesteuerung angespeist wird. Es wird darauf hingewiesen, dass anstelle des Magneten eine Hebelanordnung vorgesehen werden kann, die mit der Schussfolgesteuereinrichtung gekoppelt ist.The weft feeders 1 are staggered so that the guide openings A to F have a different height with respect to the reference plane 6. With the arrangement, six weft threads 8a to 8f are presented. Each weft thread feeder 1 is assigned to a clamping point 3a to 3f such that each weft thread is guided from the clamping point holding the weft thread through the recess 7 to the guide openings A to F essentially parallel and without crossing. Furthermore, there is an adjusting device 9 around the clamping points 3a to 3f with respect to the reference plane 6 and a device 10 for canceling a selected clamping point is provided. The actuating device 9 is a stepper motor which is connected to the weaving machine with a control device (not shown) and is controlled in accordance with a weaving program. The device 10 is, for example, an electromagnet which is fed from the firing sequence control. It is pointed out that instead of the magnet, a lever arrangement can be provided which is coupled to the weft sequence control device.

Wie die Fig. 2 zeigt enthält die Fadenklemme 2 einen Halter 11, sieben Klemmkörper 12, ein Stellorgan 13, zwei Druckfedern 14, zwei Sprengringe 15, einen Stift 16 und ein Öffnerorgan 17.As shown in FIG. 2, the thread clamp 2 contains a holder 11, seven clamping bodies 12, an actuator 13, two compression springs 14, two snap rings 15, a pin 16 and an opening element 17.

Der Halter 11 ist u-förmig ausgebildet und weist in seinen Schenkeln 21 jeweils ein Durchgangsloch 22 mit quadratischem Querschnitt und in seinem Basisabschnitt 23 ein Langloch 24 auf. Die Klemmkörper 12 sind im wesentlichen quaderförmig und haben ein Durchgangsloch 25 mit quadratischem Querschnitt. Die Klemmkörper sind an den Enden keilförmig ausgebildet, um das Einführen des Schussfadens bzw. des Öffnerorgans 17 zu erleichtern. Das Stellorgan 13 ist stabförmig ausgebildet und weist einen Abschnitt 26 mit quadratischem Querschnitt und einen zweiten Abschnitt 27 mit rundem Querschnitt auf.The holder 11 is U-shaped and has a through hole 22 with a square cross section in its legs 21 and an elongated hole 24 in its base section 23. The clamping bodies 12 are essentially cuboid and have a through hole 25 with a square cross section. The clamping bodies are wedge-shaped at the ends in order to facilitate the insertion of the weft thread or the opening member 17. The actuator 13 is rod-shaped and has a section 26 with a square cross section and a second section 27 with a round cross section.

Die Fig. 3 zeigt die Fadenklemme im montierten Zustand ohne die Stelleinrichtung 9 und die Einrichtung 10. Das Stellorgan 13 ist in den Schenkeln 21 in Richtung des Doppelpfeiles A verschiebbar angeordnet. Auf den ersten Abschnitt 26 sind die sieben Klemmkörper 12 angeordnet, welche die sechs Klemmstellen 3a bis 3f bilden. Die Klemmkörper sind so ausgelegt, dass die Klemmstellen ein Abstand von z.B. 3mm aufweisen. Der mittlere Klemmkörper ist mittels des Stiftes 16 mit dem Stellorgan 13 fest verbunden und auf jeder Seite des festgelegten Klemmkörpers sind drei Klemmkörper verschiebbar angeordnet. Beidseits der Klemmkörper 12 sind Druckfedern 14 angeordnet, welche einerseits an den Sprengringen 15 und andererseits an den äusseren Klemmkörpern 12 anliegen und letztere gegeneinander drücken. Das Stellorgan 13 ist mit der Stelleinrichtung 9 gekoppelt. Das Öffnerorgan 17 ist in dem Langloch 24 in Richtung des Doppelpfeiles B verschiebbar angeordnet und mit der Einrichtung 10 gekoppelt.3 shows the thread clamp in the assembled state without the actuating device 9 and the device 10. The actuating element 13 is arranged in the legs 21 in the direction of the double arrow A so as to be displaceable. The seven clamping bodies 12, which form the six clamping points 3a to 3f, are arranged on the first section 26. The clamping bodies are designed so that the clamping points are at a distance of, for example, 3 mm. The middle clamp is firmly connected to the actuator 13 by means of the pin 16 and three clamping bodies are arranged displaceably on each side of the fixed clamping body. Compression springs 14 are arranged on both sides of the clamping bodies 12, which rest on the one hand on the snap rings 15 and on the other hand on the outer clamping bodies 12 and press the latter against one another. The actuator 13 is coupled to the actuator 9. The opening element 17 is arranged in the slot 24 in the direction of the double arrow B and is coupled to the device 10.

Es wird auf die Figuren 4 und 5 Bezug genommen, wobei die Fig. 4 die Anordnung von der Weberstandseite her und die Fig. 5 die Anordnung von der entgegengesetzten Seite her zeigt. Die Fadenklemme 2 und das Führungsorgan 4 sind miteinander verbunden und bilden eine Funktionseinheit. Diese Funktionseinheit ist in der Greiferwebmaschine mittels nich dargestellter Mittel montiert. Die Fadenklemme 2 ist in einem vorbestimmten Abstand bezüglich dem Geweberand 31 so angeordnet, dass die Klemmstellen 3 jeweils mit der Fachspitze 32 fluchten. Zwischen der Fadenklemme 2 und dem Geweberand 31 ist eine symbolisch dargestellte Schneidvorrichtung 33 angeordnet (Fig. 5). Nachfolgend wird die Funktionsweise der Anordnung beschrieben, wobei die Anordnung aus der in Fig. 1 dargestellten Stellung in die in Fig. 4 dargestellte Stellung gebracht wird, in welcher der Schussfaden 8a dem Greifer 35 vorgelegt ist. Die Schussfadenvorlage setzt sich aus zwei Vorgängen zusammen und zwar die Schwenkung des Schussfadenvorlegers 1 in Richtung zur Bezugsebene 6 und die Verschiebung der Klemmstelle 3a in die Bezugsebene 6. Wie bereits erwähnt, sind die Schussfäden 8a bis 8f kreuzungsfrei zwischen den Klemmstellen und den Führungsöffnungen geführt. Dieser Zustand wird bei der Schwenkung des Schussfadenvorlegers beibehalten. Andererseits wird durch die Verschiebung der Klemmstelle 3a in die Bezugsebene 6 dafür gesorgt, dass der Schussfaden 8a in der Bezugseben 6 angeordnet und aufgrund der auf den Faden einwirkenden Zugspannung bereits in den Schlitz 5 eingeführt wird. (Fig. 5). Durch diese räumliche Trennung des Schussfadens 8a von den anderen Schussfäden tritt zwischen diesen keine Berührung bei der Übernahme des Schussfadens durch den Greifer 35 auf. Nach der Übernahme des Schussfadens 8a durch den Greifer 35 wird das Schussfadenende aus der Klemmstelle 3a herausgeschält und in das Webfach eingezogen. Während dem Einziehen des Schussfadens 8a wird die Klemmstelle 3a durch das Öffnerorgan 17 aufgehoben indem dieses zwischen die Klemmkörper 12 eingeführt wird, welche die Klemmstelle 3a bilden. Durch dieses Öffnerorgan wird gleichzeitig ein Spalt zwischen den Klemmkörpern 12 gebildet. In diesen Spalt wird der eingezogene Schussfaden 8a beim Anschlagen durch das Webblatt (nicht dargestellt) wieder eingeführt. Vor dem Anschlagen des Schussfadens 8a befindet sich der Schussfadenvorleger 1 wieder in der mit gestrichelten Linien dargestellten Stellung. Beim Anschlagen wird der Schussfaden 8a durch den Einlaufspalt in den Sclitz 5 geführt, wobei der Schussfaden 8a aufgrund der Stellung des Schussfadenvorlegers 1 an der Oberseite des Schlitzes 5 geführt wird. Dadurch wird der Schussfaden räumlich getrennt von den anderen Schussfäden in den Spalt zwischen den Klemmkörpern 12 eingeführt. Durch Zurückziehen des Öffnerorgans 17 wird aufgrund der Federkraft die Klemmstelle wieder etabliert und der Schussfaden in der Klemmstelle gehalten. Anschliessend wir der eingetragene Schussfaden mittels der Schneidvorrichtung 33 geschnitten. Damit ist der Schussfaden für einen neuen Eintrag bereitgestellt.Reference is made to FIGS. 4 and 5, FIG. 4 showing the arrangement from the weaver stand side and FIG. 5 the arrangement from the opposite side. The thread clamp 2 and the guide member 4 are connected to one another and form a functional unit. This functional unit is mounted in the rapier weaving machine by means not shown. The thread clamp 2 is arranged at a predetermined distance with respect to the fabric edge 31 such that the clamping points 3 are each aligned with the compartment tip 32. A symbolically illustrated cutting device 33 is arranged between the thread clamp 2 and the fabric edge 31 (FIG. 5). The mode of operation of the arrangement is described below, the arrangement being brought from the position shown in FIG. 1 to the position shown in FIG. 4, in which the weft thread 8a is presented to the hook 35. The weft thread template is composed of two processes, namely the pivoting of the weft thread feeder 1 in the direction of the reference plane 6 and the displacement of the clamping point 3a into the reference plane 6. As already mentioned, the weft threads 8a to 8f are guided without crossings between the clamping points and the guide openings. This state is maintained when the weft thread feeder is pivoted. On the other hand, the displacement of the nip 3a in the reference plane 6 ensures that the weft thread 8a is arranged in the reference plane 6 and is already inserted into the slot 5 due to the tensile stress acting on the thread. (Fig. 5). Due to this spatial separation of the weft thread 8a from the other weft threads, there is no contact between them when the weft thread is taken over by the gripper 35. After the weft thread 8a has been taken over by the gripper 35, the weft thread end is peeled out of the clamping point 3a and drawn into the shed. During the pulling in of the weft thread 8a, the clamping point 3a is released by the opening member 17 by inserting it between the clamping bodies 12, which form the clamping point 3a. A gap between the clamping bodies 12 is simultaneously formed by this opening member. The weft thread 8a drawn in is inserted into this gap again when struck by the reed (not shown). Before the weft thread 8a is struck, the weft thread feeder 1 is again in the position shown with dashed lines. When struck, the weft 8a is guided through the inlet gap into the slot 5, the weft 8a being guided on the top of the slot 5 due to the position of the weft feeder 1. As a result, the weft thread is introduced into the gap between the clamping bodies 12 in a spatially separated manner from the other weft threads. By retracting the opening member 17, the clamping point is re-established due to the spring force and the weft thread is held in the clamping point. Then the inserted weft thread is cut by means of the cutting device 33. This provides the weft for a new entry.

Claims (11)

  1. Arrangement for the presenting of weft threads (8a-8f) in a reference plane (6) of a rapier weaving machine, the arrangement comprising a plurality of controllable weft thread presenting devices (1), a controllable thread clamp (2) having a plurality of clamping positions (3a-3f) which is disposed removed from the weft thread presenting devices and also a guide member (4) having a slit (5), in order to align the weft threads (8a-8f) in the reference plane (6), wherein the alignment of each weft thread (8a-8f) can be predetermined by the position of the clamping position (3a-3f), by the position of the corresponding weft thread presenting device (1) and also by the position of the guide member (4), characterised in that the thread clamp (2) has at least three clamping positions (3a-3f) which are arranged above one another at constant spacings, and are each movable substantially perpendicular to the reference plane (6) in order to hold the weft threads (8a-8f) extending between the weft thread presenting devices (1) and the clamping positions (3a-3f) both substantially parallel and free of cross-overs, and also, in each case, to align one of the weft threads (8a-8f) into the reference plane (6), in each case without contacting further weft threads (8a-8f).
  2. Arrangement according to claim 1, characterised by a positioning device (9) in order to move one clamping position (3a-3f) in each case into the reference plane (6) and to make ready the weft thread (3a-3f) held in the clamping position for the take-over by the gripper (35).
  3. Arrangement according to claim 2, characterised in that the positioning device (9) is a stepping motor.
  4. Arrangement according to claim 1, characterised by an opening member (17) arranged movably in the reference plane (6) in order to hold open the clamping position (3a-3f) displaced into the reference plane and to make it available for the taking-up of the picked weft thread.
  5. Arrangement according to claim 4, characterised by a driving device (10) for the opening member.
  6. Arrangement according to one of claims 1 to 5, characterised by a holder (11) of fixed position, by clamping bodies (12) which are arranged in the holder and by a positioning member (13) which is operationally connected to the clamping bodies and to the positioning device in order to move the selected clamping position (3a-3f) into the reference plane (6).
  7. Arrangement according to claim 6, characterised in that the opening member (17) is displaceably arranged in the holder (11) and can be brought into engagement with the two clamping bodies (12) forming the selected clamping position (3a-3f) in order to hold open the selected clamping position.
  8. Arrangement according to claim 1, characterised in that the spacing of the clamping positions (3a-3f) amounts to at least 1 mm.
  9. Arrangement according to one of claims 1 to 8, characterised in that the guide member (4) is of fixed position with respect to the reference plane (6) in order to transfer the weft threads (8a-8f) to be inserted in the reference plane (6) and to take-over the inserted weft threads.
  10. Arrangement according to one of claims 2 to 9, characterised in that the guide member (4) includes a recess (7), in that the clamping positions (3a-3f) are displaceable within an area determined by the contour of the recess (7) in order to lead the weft threads (8a-8f), free of contact, from the weft thread presenting devices (1) to the clamping positions (3a-3f), and in that the slit (5) opens into the recess (7) in order to present the weft threads (8a-8f) to be inserted to the gripper (35).
  11. Rapier loom having a frame and an arrangement according to one of the claims 1 to 10, characterised in that the thread clamp (2) is arranged in the frame at a predetermined spacing with respect to the cloth edge (31) and in that a cutting device is provided in order to cut the inserted weft thread after the clamping.
EP93810659A 1993-09-20 1993-09-20 Arrangement to feed weft yarns Expired - Lifetime EP0644286B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59306205T DE59306205D1 (en) 1993-09-20 1993-09-20 Arrangement for placing weft threads
EP93810659A EP0644286B1 (en) 1993-09-20 1993-09-20 Arrangement to feed weft yarns
US08/289,824 US5492153A (en) 1993-09-20 1994-08-12 Clamp type arrangement for presenting weft threads to a gripper
JP21892694A JP3413809B2 (en) 1993-09-20 1994-09-13 Weft introduction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93810659A EP0644286B1 (en) 1993-09-20 1993-09-20 Arrangement to feed weft yarns

Publications (2)

Publication Number Publication Date
EP0644286A1 EP0644286A1 (en) 1995-03-22
EP0644286B1 true EP0644286B1 (en) 1997-04-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810659A Expired - Lifetime EP0644286B1 (en) 1993-09-20 1993-09-20 Arrangement to feed weft yarns

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US (1) US5492153A (en)
EP (1) EP0644286B1 (en)
JP (1) JP3413809B2 (en)
DE (1) DE59306205D1 (en)

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EP0898001A3 (en) * 1997-08-04 1999-12-08 GIVIDI-Italia S.p.A. Method of cutting the selvedge
ES2176866T3 (en) * 1997-09-11 2002-12-01 Dornier Gmbh Lindauer CONTROLLABLE CONTRIBUTION AND SUPPORTING DEVICE FOR THE WEATHER THREAD AND SYSTEM TO REDUCE TO A MINIMUM THE WASTE OF THREAD THREADS IN THE MANUFACTURE OF FABRICS OF FABRICS, BEFORE EVERYTHING OF THE CLAMBERS.
DE19739853C2 (en) * 1997-09-11 2001-04-12 Dornier Gmbh Lindauer Controllable weft feeder and clamping device and device arrangement for minimizing weft waste in the manufacture of fabrics on weaving machines, in particular on rapier weaving machines
US6253795B1 (en) * 1998-03-14 2001-07-03 Stephan Kuster Tensioning apparatus and method for an interlaced thread
EP1127181B2 (en) * 1998-10-21 2010-07-28 Picanol N.V. Thread gripper for a rapier of a rapier loom
DE19852794B4 (en) * 1998-11-16 2004-03-25 Lindauer Dornier Gmbh Controllable weft feeder and clamping device for weaving machines
EP1016744B1 (en) * 1998-12-16 2003-07-09 Sultex AG System and method for adjusting the thread clamp of a feeding gripper and loom with such system
EP1020550B1 (en) * 1999-01-12 2004-07-21 Sultex AG Device for separating a weft thread to be inseted in a shed and loom with such a device
DE59910006D1 (en) * 1999-01-12 2004-08-26 Sultex Ag Rueti Device for separating a weft thread to be introduced into a shed and loom with such a device
BE1012676A3 (en) * 1999-05-12 2001-02-06 Wiele Michel Van De Nv DEVICE FOR IMPACT ON CANCELLATION a loom.
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head
DE502006003985D1 (en) * 2006-01-24 2009-07-30 Sultex Ag Controlled thread brake
DE102006025265A1 (en) * 2006-05-31 2007-12-06 Lindauer Dornier Gmbh Method and apparatus for forming a fabric edge on a rapier loom
BE1019807A3 (en) 2011-07-12 2012-12-04 Picanol DEVICE AND METHOD FOR CLOSING AN IMPOSITION WIRE
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IT201700073787A1 (en) * 2017-06-30 2018-12-30 Itema Spa PLOT WIRE MANAGEMENT DEVICE WITHOUT FALSE FORMATION IN A TEXTILE CLAMP FRAME

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Also Published As

Publication number Publication date
JPH07150443A (en) 1995-06-13
JP3413809B2 (en) 2003-06-09
EP0644286A1 (en) 1995-03-22
US5492153A (en) 1996-02-20
DE59306205D1 (en) 1997-05-22

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