EP2572022B1 - Gripper and weft-thread insertion device for a gripper weaving machine - Google Patents

Gripper and weft-thread insertion device for a gripper weaving machine Download PDF

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Publication number
EP2572022B1
EP2572022B1 EP11707403.9A EP11707403A EP2572022B1 EP 2572022 B1 EP2572022 B1 EP 2572022B1 EP 11707403 A EP11707403 A EP 11707403A EP 2572022 B1 EP2572022 B1 EP 2572022B1
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EP
European Patent Office
Prior art keywords
torsion rod
gripper
clamping
clamping jaw
twisting
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.)
Not-in-force
Application number
EP11707403.9A
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German (de)
French (fr)
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EP2572022A2 (en
Inventor
Dirk TRÖNDLE
Fabian Neuhaus
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Textilma AG
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Textilma AG
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Publication date
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Priority to EP11707403.9A priority Critical patent/EP2572022B1/en
Publication of EP2572022A2 publication Critical patent/EP2572022A2/en
Application granted granted Critical
Publication of EP2572022B1 publication Critical patent/EP2572022B1/en
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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
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers

Definitions

  • the invention relates to a gripper for a rapier according to the preamble of claim 1. Furthermore, the invention relates to a weft insertion device with a corresponding gripper.
  • rapier looms of the weft thread is usually introduced by a Bringgreifer from one side into the shed and then - usually in about the middle of the shed - passed a Holgreifer, which then pulls the weft from the shed.
  • gripping elements are formed in a gripping head in both grippers. The grippers move along along guide elements which are attached to the reed.
  • a gripper for introducing a weft thread with a pivotable clamping tongue which is connected to a rotatable shaft part and is under the action of a torsion spring to clamp the weft thread.
  • the torsion spring as a torsion bar spring in such a way that it is rotatably connected at one end to the shaft portion and connected to the other end via adjusting means with the housing of the gripper.
  • Such a configuration has proven to be advantageous in principle, since the weft thread is subjected to little stress and thus very sensitive threads can be used.
  • EP-A-0 690 160 Another type of weft insertion device is known, in which permanent magnets are provided for the gripping elements, which are secured by correspondingly arranged electromagnetic devices on the guide elements effect an opening or closing of the gripper heads controlled for the Bringgreifer and the Holgreifer.
  • the gripper device of EP-A-0 690 160 has the disadvantage that can easily cause a strain of the weft thread by the difficult to control when passing force.
  • CH-A-556 930 was proposed to reduce the stress on the weft thread to form a gripper with a movable clamping part and a stationary abutment, wherein the counter bearing a soft elastic pad is provided with a floating mounted on it, wear-resistant support part.
  • the in the CH-A-556 930 proposed embodiment is characterized in that the support member held by its shape and the elasticity of the soft elastic pad (clamped) and thereby replacement or removal of the support member is made possible. In practice, however, have problems with it, especially in terms of wear.
  • the object of the invention is to improve a gripper device for the weft insertion of a rapier of the type described above and to ensure a safe entrainment of the thread at high weft insertion frequencies.
  • the object is achieved by a gripper device according to claim 1.
  • the measures of the invention initially have the consequence that - especially at high operating frequencies - a weft threads gentle operation of the clamping tongue is possible.
  • the gripper ensures according to the present invention, even at high speeds of the loom safe, trouble-free and low-wear operation.
  • a mechanical actuator which was already known from the prior art, is provided for rotating the Torsionsstabes regardless of the permanent magnet means for releasing the clamping tongue of the jaw. This can be ensured in particular a setting, a manual insertion of the thread and a maintenance and troubleshooting.
  • An embodiment in which the clamping jaw is designed as a fixed clamping jaw and the torsion bar is arranged in a housing is advantageous.
  • an alternative, very advantageous embodiment of the invention is when the clamping tongue is pivotable by a further spring substantially transverse to the axis of the torsion bar, rests by the bias of the other spring on the jaw and can be solved by a twisting of the torsion bar of the jaw.
  • the torsion bar may have as a lever, cam or sliding means acting guide means by twisting of the torsion bar pivots the clamping tongue against their, caused by the bias of the other spring bias and releases from the jaw.
  • This can advantageously be formed in that the lever, cam or slide means is formed as a flattening section or equivalent design of the torsion bar, which in engagement with the clamping tongue this can rest against the jaw. This arrangement has considerable advantages in terms of picking the weft thread, forming a separately operable clamp and a separately operating torsion bar.
  • FIGS. 1 to 3 show a gripper to this embodiment.
  • the arranged on a rapier or a gripper bar 18 and guided along the shed 13 gripper has a housing, a clamping part with a clamping tongue 3 and an actuating tab 4 for manual or mechanical operation of the clamping tongue 3.
  • the housing of the gripper is made of plastic.
  • the clamping part is made of metal and is connected to the housing.
  • the operation of the gripper is clear from the schematic representation of Figure 4.
  • the torsion bar 1 is on the one hand operatively connected to an actuating tab 4 in a conventional manner.
  • the actuating tab 4 abuts against a stop 5.
  • the torsion bar 1 is operatively connected to a pair of oppositely poled permanent magnets 4 and 5.
  • these permanent magnets 4 and 5 are arranged as extension elements of a quasi-motor designed as a magnetic unit 16, wherein the arranged on the torsion bar 1 axis of rotation does not coincide with the magnets 14 and 15. This makes the motor assembly easier to manufacture.
  • the torsion bar 1 is rotated by its motor force acting on this magnet 7 on the two gripper magnets 14 and 15 against its bias in (twisted) and opens - when driving past for a short time - the clamping part 11 by the clamping tongue 3 is released from the jaw 17 and thereby releases the weft thread 12 or allows the weft thread to get into the clamping part 11.
  • the weft transfer completed. After the magnet unit (motor unit) 16 has disappeared from the effective range of the permanent magnet 7, the provision of the clamping tongue is due to the bias of the torsion bar.
  • the clamping force is set according to the characteristics of a weft thread.
  • FIG. 5 is shown schematically, is rotated by the motor force acting from this magnet 7 on the two gripper magnets 14 and 15, the torsion bar 1 against its bias (twisted) and opens - when passing for a short time - the clamping member 11, by the biased by a spring and mounted by means of a storage or clamping 25 clamping tongue 24 is lifted by the cam or link 23 of the jaw 17 and thus released from this, thereby releasing the weft thread 12 and allows the weft, in the clamping part to get.
  • arranged to form a "straight" terminal clamping tongue 24 is thus in an axis which is arranged substantially transverse to the axis of the torsion bar, and not - as in the embodiment described above - in the axis of the torsion bar.
  • This arrangement has considerable advantages in terms of picking the weft thread, forming a separately operable clamp and a separately operating torsion bar.

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

Description

Technisches GebietTechnical area

Die Erfindung betrifft einen Greifer für eine Greiferwebmaschine gemäss dem Oberbegriff von Anspruch 1. Weiterhin betrifft die Erfindung eine Schussfadeneintragvorrichtung mit einem entsprechenden Greifer.The invention relates to a gripper for a rapier according to the preamble of claim 1. Furthermore, the invention relates to a weft insertion device with a corresponding gripper.

Stand der TechnikState of the art

Bei Greiferwebmaschinen wird der Schussfaden üblicherweise von einem Bringgreifer von einer Seite in das Webfach eingebracht und dann - üblicherweise in etwa in der Mitte des Webfaches - einem Holgreifer übergeben, der den Schussfaden sodann aus dem Webfach herauszieht. Dabei sind in beiden Greifern Greifelemente in einem Greifkopf ausgebildet. Die Greifer bewegen sich dabei längs von Führungselementen, die am Webblatt befestigt sind.In rapier looms of the weft thread is usually introduced by a Bringgreifer from one side into the shed and then - usually in about the middle of the shed - passed a Holgreifer, which then pulls the weft from the shed. In this case, gripping elements are formed in a gripping head in both grippers. The grippers move along along guide elements which are attached to the reed.

Aus der WO 2000/070136 A ist ein Greifer zum Eintragen eines Schussfadens mit einer schwenkbaren Klemmzunge bekannt, die mit einem drehbaren Schaftteil verbunden ist und unter Einwirkung einer Torsionsfeder steht um den Schussfaden zu klemmen. In der WO 2000/070136 A wird vorgeschlagen, die Torsionsfeder als Torsionsstabfeder so auszubilden, dass sie an einem Ende mit dem Schaftteil drehfest verbunden ist und mit dem anderen Ende über Stellmittel mit dem Gehäuse des Greifers verbunden ist. Eine solche Ausgestaltung hat sich grundsätzlich als vorteilhaft herausgestellt, da der Schussfaden wenig beansprucht wird und somit auch sehr empfindliche Fäden verwendet werden können. In der WO 2000/070136 A wird ein mechanisches Betätigungsorgan für die Klemmzunge vorgeschlagen, welches durch ein Stellglied verlagert wird und die Klemmzunge mechanisch betätigt. Allerdings sind die Anforderungen an die Eintragsfrequenz von Schussfäden seit der WO 2000/070136 A erheblich gestiegen, do dass eine solche Lösung nicht mehr ausreichend erscheint.From the WO 2000/070136 A a gripper for introducing a weft thread with a pivotable clamping tongue is known, which is connected to a rotatable shaft part and is under the action of a torsion spring to clamp the weft thread. In the WO 2000/070136 A It is proposed that the torsion spring as a torsion bar spring in such a way that it is rotatably connected at one end to the shaft portion and connected to the other end via adjusting means with the housing of the gripper. Such a configuration has proven to be advantageous in principle, since the weft thread is subjected to little stress and thus very sensitive threads can be used. In the WO 2000/070136 A a mechanical actuator for the clamping tongue is proposed, which is displaced by an actuator and mechanically actuates the clamping tongue. However, the requirements for the picking frequency of weft threads since the WO 2000/070136 A increased significantly, do that such a solution is no longer sufficient.

Aus der EP-A-0 690 160 ist eine andere Art von Schussfadeneintragvorrichtungen bekannt, in der für die Greifelemente Permanentmagnete vorgesehen sind, die durch entsprechend eingerichtete elektromagnetische Vorrichtungen an den Führungselementen für den Bringgreifer und den Holgreifer ein Öffnen bzw. Schliessen der Greiferköpfe gesteuert bewirken. Die Greifervorrichtung der EP-A-0 690 160 ist - wie andere Greifervorrichtungen mit Permanentmagneten allerdings mit dem Nachteil behaftet, dass durch die beim Vorbeiführen nur schwer zu steuerbaren Krafteinwirkungen leicht eine Strapazierung des Schussfadens bewirken können.From the EP-A-0 690 160 Another type of weft insertion device is known, in which permanent magnets are provided for the gripping elements, which are secured by correspondingly arranged electromagnetic devices on the guide elements effect an opening or closing of the gripper heads controlled for the Bringgreifer and the Holgreifer. The gripper device of EP-A-0 690 160 However, like other gripper devices with permanent magnets, however, has the disadvantage that can easily cause a strain of the weft thread by the difficult to control when passing force.

In der CH-A-556 930 wurde zur geringeren Strapazierung des Schussfadens vorgeschlagen, einen Greifer mit einem beweglichen Klemmteil und einem ortsfesten Gegenlager auszubilden, wobei am Gegenlager eine weichelastische Unterlage mit einem darauf schwimmend eingelagerten, verschleissfesten Auflageteil vorgesehen ist. Die in der CH-A-556 930 vorgeschlagene Ausführung zeichnet sich dadurch aus, dass das Auflageteil durch seine Form und die Elastizität der weichelastischen Unterlage festgehalten (geklemmt) und dadurch ein Auswechseln oder Entfernen des Auflageteils ermöglicht wird. In der Praxis haben sich damit aber Probleme ergeben, insbesondere in Bezug auf den Verschleiss.In the CH-A-556 930 was proposed to reduce the stress on the weft thread to form a gripper with a movable clamping part and a stationary abutment, wherein the counter bearing a soft elastic pad is provided with a floating mounted on it, wear-resistant support part. The in the CH-A-556 930 proposed embodiment is characterized in that the support member held by its shape and the elasticity of the soft elastic pad (clamped) and thereby replacement or removal of the support member is made possible. In practice, however, have problems with it, especially in terms of wear.

Darstellung der ErfindungPresentation of the invention

Aufgabe der Erfindung ist es, eine Greifereinrichtung für den Schussfadeneintrag einer Greiferwebmaschine der eingangs beschriebenen Art zu verbessern und eine sichere Mitnahme des Fadens bei hohen Schusseintragsfrequenzen zu gewährleisten.The object of the invention is to improve a gripper device for the weft insertion of a rapier of the type described above and to ensure a safe entrainment of the thread at high weft insertion frequencies.

Die Aufgabe wird durch eine Greifereinrichtung nach Anspruch 1 gelöst. Dabei haben die Massnahmen der Erfindung zunächst einmal zur Folge, dass - insbesondere bei hohen Betriebsfrequenzen - ein die Schussfäden schonender Betrieb der Klemmzunge möglich ist. Zudem sichert der Greifer gemäss der vorliegenden Erfindung auch bei hohen Drehzahlen der Webmaschine einen sicheren, störungs- und verschleissarmen Betrieb.The object is achieved by a gripper device according to claim 1. The measures of the invention initially have the consequence that - especially at high operating frequencies - a weft threads gentle operation of the clamping tongue is possible. In addition, the gripper ensures according to the present invention, even at high speeds of the loom safe, trouble-free and low-wear operation.

Vorteilhafte Ausgestaltungen des Greifers gemäss der vorliegenden Erfindung sind in den Ansprüchen 2 bis 11 beschrieben.Advantageous embodiments of the gripper according to the present invention are described in claims 2 to 11.

Vorteilhaft ist es, wenn ein mechanisches Betätigungsorgan, welches schon aus dem Stand der Technik bekannt war, zum Verdrehen des Torsionsstabes unabhängig von den Dauermagneteinrichtungen für ein Lösen der Klemmzunge von der Klemmbacke vorgesehen ist. Dadurch kann insbesondere ein Einstellen, ein händisches Einlegen des Fadens und eine Wartung und Problembehebung gewährleistet werden. Vorteilhaft ist eine Ausgestaltungen, bei der die Klemmbacke als feste Klemmbacke ausgebildet und der Torsionsstab einem Gehäuse angeordnet ist.It is advantageous if a mechanical actuator, which was already known from the prior art, is provided for rotating the Torsionsstabes regardless of the permanent magnet means for releasing the clamping tongue of the jaw. This can be ensured in particular a setting, a manual insertion of the thread and a maintenance and troubleshooting. An embodiment in which the clamping jaw is designed as a fixed clamping jaw and the torsion bar is arranged in a housing is advantageous.

Ideal ist es, wenn zwei gegenförmig gepolte Dauermagnete symmetrisch um den Torsionsstab angeordnet sind, so dass die Auslenkkraft vollumfänglich direkt dem Verdrehen des Torsionsstabes dienen kann. Es ist aber auch möglich, dass der Torsionsstab etwas verlagert, aber immer noch zwischen den beiden gegenförmig gepolte Dauermagnete angeordnet ist, so dass ein Auslenken der Dauermagnete ebenfalls ein Verdrehen des Torsionsstabes zur Folge hat. Weiterhin ist es konstruktiv einfacher, wenn der Torsionsstab noch weiter verlagert zwischen Verlängerungselementen der beiden gegenförmig gepolte Dauermagnete angeordnet ist, so dass ein Auslenken der Dauermagnete ebenfalls ein Verdrehen des Torsionsstabes zur Folge hat.It is ideal if two oppositely poled permanent magnets are arranged symmetrically around the torsion bar, so that the deflection force can fully serve directly to the twisting of the torsion bar. But it is also possible that the torsion bar displaced slightly, but is still arranged between the two counter-magnetically polarized permanent magnets, so that a deflection of the permanent magnets also has a twisting of the torsion bar result. Furthermore, it is structurally simpler if the torsion bar is displaced further displaced between extension elements of the two counter-poled permanent magnets, so that a deflection of the permanent magnets also has a twisting of the torsion bar result.

Eine vorteilhafte Anordnung ist, wenn die Klemmzunge direkt mit dem Torsionsstab verbunden und im wesentlichen in der Achse des Torsionsstabes verdrehbar ist, durch die Vorspannung an der Klemmbacke anliegt und durch ein Verdrehen des Torsionsstabes von der Klemmbacke lösbar ist. Dabei können Mittel zum Vorspannen des Torsionsstabes und damit zum Einstellen der Klemmkraft vorgesehen sein.An advantageous arrangement, when the clamping tongue is connected directly to the torsion bar and is rotatable substantially in the axis of the torsion bar, rests by the bias on the jaw and can be solved by a twisting of the torsion bar of the jaw. In this case, means for biasing the torsion bar and thus to adjust the clamping force can be provided.

Eine alternative, sehr vorteilhafte Ausgestaltung der Erfindung ist, wenn die Klemmzunge durch eine weitere Feder im wesentlichen quer zur Achse des Torsionsstabes schwenkbar ist, durch die Vorspannung der weiteren Feder an der Klemmbacke anliegt und durch ein Verdrehen des Torsionsstabes von der Klemmbacke lösbar ist. Dabei kann der Torsionsstab als Hebel-, Nocken- bzw. Kulissenmittel wirkende Führungseinrichtung aufweisen, die durch ein Verdrehen des Torsionsstabes die Klemmzunge gegen deren, durch die Vorspannung der weiteren Feder bewirkte Vorspannung schwenkt und von der Klemmbacke löst. Dies kann vorteilhafterweise dadurch ausgebildet sein, dass die Hebel-, Nocken- bzw. Kulissenmittel als abschnittsweise Abflachung oder gleichwirkende Ausbildung des Torsionsstabes ausgebildet ist, die im Eingriff mit der Klemmzunge diese an die Klemmbacke anliegen lässt. Diese Anordnung hat in Bezug auf das Einlesen des Schussfadens, der Ausbildung einer separat betätigbaren Klemme und eines separat funktionierenden Torsionsstabes erhebliche Vorteile.An alternative, very advantageous embodiment of the invention is when the clamping tongue is pivotable by a further spring substantially transverse to the axis of the torsion bar, rests by the bias of the other spring on the jaw and can be solved by a twisting of the torsion bar of the jaw. In this case, the torsion bar may have as a lever, cam or sliding means acting guide means by twisting of the torsion bar pivots the clamping tongue against their, caused by the bias of the other spring bias and releases from the jaw. This can advantageously be formed in that the lever, cam or slide means is formed as a flattening section or equivalent design of the torsion bar, which in engagement with the clamping tongue this can rest against the jaw. This arrangement has considerable advantages in terms of picking the weft thread, forming a separately operable clamp and a separately operating torsion bar.

Die vorbenannten sowie die beanspruchten und in den nachfolgenden Ausführungsbeispielen beschriebenen, erfindungsgemäss zu verwendenden Elemente unterliegen in ihrer Grösse, Formgestaltung, Materialverwendung und ihrer technischen Konzeption keinen besonderen Ausnahmebedingungen, so dass die in dem jeweiligen Anwendungsgebiet bekannten Auswahlkriterien uneingeschränkt Anwendung finden können.The above-mentioned as well as the claimed and described in the following embodiments, according to the invention to be used elements are subject to their size, shape design, material usage and their technical conception no special conditions of exception, so that the well-known in the respective field of application selection criteria can apply without restriction.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Ausführungsbeispiele der Erfindung werden anhand schematischer Zeichnungen nachfolgend näher beschrieben, dabei zeigen:

Figur 1
eine Darstellung eines erfindungsgemässen Greifers gemäss einem ersten Ausführungsbeispiel der vorliegenden Erfindung;
Figur 2
eine Darstellung entlang des Schnittes A-A aus Figur 1;
Figur 3
eine Darstellung entlang des Schnittes B-B aus Figur 1;
Figur 4
eine schematische Darstellung eines solchen Greifers gemäss den Figuren 1 bis 3;
Figur 5
eine schematische Darstellung eines solchen Greifers gemäss einem zweiten Ausführungsbeispiel der vorliegenden Erfindung.
Exemplary embodiments of the invention will be described in more detail below with reference to schematic drawings, in which:
FIG. 1
a representation of a gripper according to the invention according to a first embodiment of the present invention;
FIG. 2
a representation along the section AA FIG. 1 ;
FIG. 3
a representation along the section BB FIG. 1 ;
FIG. 4
a schematic representation of such a gripper according to the FIGS. 1 to 3 ;
FIG. 5
a schematic representation of such a gripper according to a second embodiment of the present invention.

Wege zur Ausführung der ErfindungWays to carry out the invention

Zu einem ersten Ausführungsbeispiel der vorliegenden Erfindung wird auf die Figuren 1 bis 3 Bezug genommen, welche einen Greifer zu diesem Ausführungsbeispiel zeigen. Der an einem Greiferband oder an einer Greiferstange 18 angeordnete und längs des Webfachs 13 geführte Greifer weist ein Gehäuse, einen Klemmteil mit einer Klemmzunge 3 und eine Betätigungslasche 4 zum händisches bzw. mechanischen Betätigen der Klemmzunge 3 auf. Das Gehäuse des Greifers besteht aus Kunststoff. Der Klemmteil besteht aus Metall und ist mit dem Gehäuse verbunden.For a first embodiment of the present invention is on the FIGS. 1 to 3 Reference is made, which show a gripper to this embodiment. The arranged on a rapier or a gripper bar 18 and guided along the shed 13 gripper has a housing, a clamping part with a clamping tongue 3 and an actuating tab 4 for manual or mechanical operation of the clamping tongue 3. The housing of the gripper is made of plastic. The clamping part is made of metal and is connected to the housing.

Die Wirkungsweise des Greifers wird aus der schematischen Darstellung von Figur 4 deutlich. Der Torsionsstab 1 ist einerseits mit einer Betätigungslasche 4 in herkömmlicher Weise wirkverbunden. Die Betätigungslasche 4 schlägt an einem Anschlag 5 an. Andererseits ist der Torsionsstab 1 mit einem Paar von gegenförmig gepolten Dauermagneten 4 und 5 wirkverbunden. Im Ausführungsbeispiel sind diese Dauermagnete 4 und 5 als Verlängerungselemente einer quasi als Motor ausgebildeten Magneteinheit 16 angeordnet, bei der die auf dem Torsionsstab 1 angeordnete Drehachse nicht mit den Magneten 14 und 15 zusammenfällt. Dadurch ist die Motoranordnung leichter herzustellen.The operation of the gripper is clear from the schematic representation of Figure 4. The torsion bar 1 is on the one hand operatively connected to an actuating tab 4 in a conventional manner. The actuating tab 4 abuts against a stop 5. On the other hand, the torsion bar 1 is operatively connected to a pair of oppositely poled permanent magnets 4 and 5. In the exemplary embodiment, these permanent magnets 4 and 5 are arranged as extension elements of a quasi-motor designed as a magnetic unit 16, wherein the arranged on the torsion bar 1 axis of rotation does not coincide with the magnets 14 and 15. This makes the motor assembly easier to manufacture.

Wenn der Greifer nun an einem stationären Magneten 7 an einem der Wendepunkte vorbei fährt, so wird durch die motorische Kraft, die von diesem Magneten 7 auf die beiden Greifermagnete 14 und 15 wirkt, der Torsionsstab 1 entgegen seine Vorspannung in sich gedreht (tordiert) und öffnet - beim Vorbeifahren für eine kurze Zeit - den Klemmteil 11, indem die Klemmzunge 3 von der Klemmbacke 17 gelöst wird und gibt dadurch den Schussfaden 12 frei bzw. ermöglicht es dem Schussfaden, in das Klemmteil 11 zu gelangen. Bei einer Kombination eines Bringgreifers mit einem Holgreifer wird dadurch - in bekannter Weise - die Schussfadenübergabe vollzogen. Nachdem die Magneteinheit (Motoreinheit) 16 aus dem Wirkbereich des Dauermagneten 7 entschwunden ist, erfolgt die Rückstellung der Klemmzunge aufgrund der Vorspannung des Torsionsstabes 1.If the gripper now moves past a stationary magnet 7 at one of the turning points, the torsion bar 1 is rotated by its motor force acting on this magnet 7 on the two gripper magnets 14 and 15 against its bias in (twisted) and opens - when driving past for a short time - the clamping part 11 by the clamping tongue 3 is released from the jaw 17 and thereby releases the weft thread 12 or allows the weft thread to get into the clamping part 11. In a combination of a Bringgreifers with a Holgreifer thereby - in a known manner - the weft transfer completed. After the magnet unit (motor unit) 16 has disappeared from the effective range of the permanent magnet 7, the provision of the clamping tongue is due to the bias of the torsion bar. 1

Im Regelfall wird die Klemmkraft entsprechen den Eigenschaften eines Schussfadens eingestellt.As a rule, the clamping force is set according to the characteristics of a weft thread.

In einer alternativen Ausführungsform, die in Figur 5 schematisch dargestellt ist, wird durch die motorische Kraft, die von diesem Magneten 7 auf die beiden Greifermagnete 14 und 15 wirkt, der Torsionsstab 1 entgegen seine Vorspannung in sich gedreht (tordiert) und öffnet - beim Vorbeifahren für eine kurze Zeit - den Klemmteil 11, indem die mit einer Feder vorgespannte und mittels einer Lagerung bzw. Einspannung 25 gelagerte Klemmzunge 24 mittels der Nocken bzw. Kulisse 23 von der Klemmbacke 17 abgehoben und somit von dieser gelöst wird und dadurch den Schussfaden 12 freigibt bzw. dem Schussfaden ermöglicht, in das Klemmteil zu gelangen. In dieser Ausführung wird die zur Ausbildung einer "geraden" Klemme angeordnete Klemmzunge 24 also in einer Achse, die im wesentlichen quer zur Achse zum Torsionsstab angeordnet ist, geschwenkt und nicht - wie im zuvor beschriebenen Ausführungsbeispiel - in der Achse des Torsionsstabes. Diese Anordnung hat in Bezug auf das Einlesen des Schussfadens, der Ausbildung einer separat betätigbaren Klemme und eines separat funktionierenden Torsionsstabes erhebliche Vorteile.In an alternative embodiment, the in FIG. 5 is shown schematically, is rotated by the motor force acting from this magnet 7 on the two gripper magnets 14 and 15, the torsion bar 1 against its bias (twisted) and opens - when passing for a short time - the clamping member 11, by the biased by a spring and mounted by means of a storage or clamping 25 clamping tongue 24 is lifted by the cam or link 23 of the jaw 17 and thus released from this, thereby releasing the weft thread 12 and allows the weft, in the clamping part to get. In this embodiment, arranged to form a "straight" terminal clamping tongue 24 is thus in an axis which is arranged substantially transverse to the axis of the torsion bar, and not - as in the embodiment described above - in the axis of the torsion bar. This arrangement has considerable advantages in terms of picking the weft thread, forming a separately operable clamp and a separately operating torsion bar.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Torsionsstabtorsion bar
22
Abstützungsupport
33
Klemmzungeclamping tongue
44
Betätigungslascheoperating tab
55
Anschlagattack
66
Magnetträgermagnet carrier
77
Auslösemagnet (stationärer Magnet jeweils an den Wendepunkten)Trigger magnet (stationary magnet at the turning points)
88th
Blattträgerblade carrier
1111
Klemmteilclamping part
1212
Schussfadenweft
1313
Webfachshed
1414
Greifermagnet anziehendGripper magnet attracting
1515
Greifermagnet abstossendRepulsive gripper magnet
1616
Magneteinheit mit den Magneten 14 und 15Magnet unit with the magnets 14 and 15
1717
Klemmbackejaw
1818
Greiferband und GreiferstangeGripper band and rapier rod
2323
Hebel bzw. Nocke oder KulisseLever or cam or backdrop
2424
Klemmzunge als HebelClamping tongue as a lever
2525
Lagerung bzw. Einspannung der KlemmzungeStorage or clamping of the clamping tongue

Claims (11)

  1. A gripper for a gripper weaving machine having a sliding track, along which the gripper can be moved to and fro out of a receiving position for a weft-thread into a transfer position, or out of the transfer position into a delivery position for the weft-thread, wherein the gripper has a thread clamp with a movable clamping tongue (3, 24) and a clamping jaw, wherein the movable clamping tongue (3, 24) is prestressed in the clamping position by means of a spring element, whereby the clamping tongue (3, 24) and the clamping jaw (17) cooperate as a thread clamp, and wherein the clamping tongue (3, 24) is cooperatively connected with a torsion rod (1) in such manner that it is releasable from the clamping jaw (17) upon twisting of the torsion rod (1), characterized in that the thread clamp further has permanent magnet devices (6, 14, 15) along the sliding track which are configured to cause a twisting of the torsion rod (1) and a release of the clamping tongue (3, 24) from the clamping jaw (17) by cooperating with corresponding counter magnets (7) arranged at the sliding track.
  2. The gripper according to claim 1, characterized in that an actuating organ (4) is provided for twisting of the torsion rod (1) independently of the permanent magnet devices (6, 14, 15) for releasing the clamping tongue (3) from the clamping jaw (17).
  3. The gripper according to claim 1 or 2, characterized in that the clamping jaw is configured as a fixed clamping jaw (17).
  4. The gripper according to one of claims 1 to 3, characterized in that the torsion rod (1) is arranged in a casing.
  5. The gripper according to one of claims 1 to 4, characterized in that the permanent magnet devices (6, 14, 15) comprise two oppositely poled permanent magnets (14, 15) between which the torsion rod (1) is arranged in such manner that a displacement of the permanent magnets (14, 15) results in a twisting of the torsion rod (1).
  6. The gripper according to one of claims 1 to 4, characterized in that the permanent magnet devices (6, 14, 15) comprise two oppositely poled permanent magnets (14, 15), each having extension elements, the torsion rod (1) being arranged between said extension elements in such manner that a displacement of the permanent magnets (6) results in a twisting of the torsion rod (1).
  7. The gripper according to one of claims 1 to 6, characterized in that the clamping tongue (3) is directly connected with the torsion rod (1) and substantially twistable about the axis of the torsion rod (1), abuts against the clamping jaw (17) due to the prestressing and is releasable from the clamping jaw by a twisting of the torsion rod (1).
  8. The gripper according to claim 7, characterized in that means for prestressing of the torsion rod (1) and thus for adjusting the clamping force are provided.
  9. The gripper according to one of claims 1 to 6, characterized in that the clamping tongue (24) is pivotable substantially transversely to the axis of the torsion rod (1), abuts against the clamping jaw (17) due to the prestressing of a further spring and is releasable from the clamping jaw (17) upon twisting of the torsion rod.
  10. The gripper according to claim 9, characterized in that the torsion rod (1) has lever, cam or coulisse means (23) which upon twisting of the torsion rod (1) pivot the clamping tongue (24) against the prestressing thereof and release it from the clamping jaw (17).
  11. The gripper according to claim 10, characterized in that the lever, cam or coulisse means (23) are configured as segment wise chamfer or equivalent configuration of the torsion rod (1), which upon engaging the clamping tongue (24) causes the same to abut against the clamping jaw (17).
EP11707403.9A 2010-05-18 2011-03-04 Gripper and weft-thread insertion device for a gripper weaving machine Not-in-force EP2572022B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11707403.9A EP2572022B1 (en) 2010-05-18 2011-03-04 Gripper and weft-thread insertion device for a gripper weaving machine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10163061A EP2388361A1 (en) 2010-05-18 2010-05-18 Gripper and weft thread insertion device for a rapier weaving machine
EP11707403.9A EP2572022B1 (en) 2010-05-18 2011-03-04 Gripper and weft-thread insertion device for a gripper weaving machine
PCT/EP2011/053344 WO2011144368A2 (en) 2010-05-18 2011-03-04 Gripper and weft-thread insertion device for a gripper weaving machine

Publications (2)

Publication Number Publication Date
EP2572022A2 EP2572022A2 (en) 2013-03-27
EP2572022B1 true EP2572022B1 (en) 2015-10-28

Family

ID=42937451

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10163061A Withdrawn EP2388361A1 (en) 2010-05-18 2010-05-18 Gripper and weft thread insertion device for a rapier weaving machine
EP11707403.9A Not-in-force EP2572022B1 (en) 2010-05-18 2011-03-04 Gripper and weft-thread insertion device for a gripper weaving machine

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP10163061A Withdrawn EP2388361A1 (en) 2010-05-18 2010-05-18 Gripper and weft thread insertion device for a rapier weaving machine

Country Status (5)

Country Link
EP (2) EP2388361A1 (en)
CN (1) CN103003479B (en)
BR (1) BR112012029307A2 (en)
HK (1) HK1178578A1 (en)
WO (1) WO2011144368A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105506837A (en) * 2016-01-13 2016-04-20 东华大学 Shuttle picking-up device of stereoscopic loom
CN110209069B (en) * 2019-06-28 2020-03-31 武汉纺织大学 Magnetic levitation gripper precise weft insertion control method and system and information processing terminal

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE798958A (en) 1972-08-14 1973-08-16 Dornier Gmbh Lindauer WEFT INSERTION DEVICE FOR SHUTTLE Looms
CN1058815A (en) * 1991-07-27 1992-02-19 郭福成 Magnetic force loom
JPH07331558A (en) 1994-06-06 1995-12-19 Toyota Autom Loom Works Ltd Weft-insertion method for rapier loom and apparatus therefor
DE29808997U1 (en) * 1998-05-18 1998-07-30 Textilma Ag, Hergiswil Gripper and a weft insertion device for a rapier weaving machine
DE29908675U1 (en) 1999-05-17 1999-08-12 Textilma Ag, Hergiswil Gripper and device for inserting a weft thread
DE10107311A1 (en) * 2001-02-16 2002-08-29 Iro Patent Ag Baar thread gripper
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head
WO2008052369A1 (en) * 2006-10-30 2008-05-08 Textilma Ag Weft thread infeed device for a gripper weaving machine
ATE521742T1 (en) * 2007-08-28 2011-09-15 Textilma Ag WEFT THREAD INSERTION DEVICE FOR A HANGER WEAVING MACHINE

Also Published As

Publication number Publication date
CN103003479A (en) 2013-03-27
BR112012029307A2 (en) 2016-07-26
EP2388361A1 (en) 2011-11-23
WO2011144368A2 (en) 2011-11-24
HK1178578A1 (en) 2013-09-13
EP2572022A2 (en) 2013-03-27
WO2011144368A3 (en) 2012-01-19
CN103003479B (en) 2014-05-07

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