EP2572022A2 - Gripper and weft-thread insertion device for a gripper weaving machine - Google Patents

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

Info

Publication number
EP2572022A2
EP2572022A2 EP11707403A EP11707403A EP2572022A2 EP 2572022 A2 EP2572022 A2 EP 2572022A2 EP 11707403 A EP11707403 A EP 11707403A EP 11707403 A EP11707403 A EP 11707403A EP 2572022 A2 EP2572022 A2 EP 2572022A2
Authority
EP
European Patent Office
Prior art keywords
torsion bar
clamping
gripper
jaw
clamping tongue
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.)
Granted
Application number
EP11707403A
Other languages
German (de)
French (fr)
Other versions
EP2572022B1 (en
Inventor
Dirk TRÖNDLE
Fabian Neuhaus
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.)
Textilma AG
Original Assignee
Textilma 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 Textilma AG filed Critical Textilma AG
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
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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.
  • the weft thread is usually introduced into the shed from one side by a gripper and then - usually approximately in the middle of the shed - handed over to a holgreifer who then pulls the weft thread out of 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 entering 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.
  • the torsion springs it is proposed to design the torsion springs as a torsion bar spring in such a way that they terminate at one end with the torsion bar spring
  • Shaft part is rotatably connected 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.
  • a mechanical actuator for the clamping tongue is proposed, which is displaced by an actuator and mechanically actuates the clamping tongue.
  • the requirements on the picking frequency of weft threads since WO 2000/070136 A have increased considerably, do that such a solution no longer seems sufficient.
  • EP-A-0 690 160 From EP-A-0 690 160 a different type of weft insertion device is known, in which permanent magnets are provided for the gripping elements, which are mounted on the guide by correspondingly arranged electromagnetic devices. tion elements for the Bringgreifer and the Holgreifer controlled opening or closing of the gripper heads effect.
  • the gripper device of EP-A-0 690 160 is - like other gripper devices with permanent magnets but has the disadvantage that can easily cause a stress on the weft thread by the difficult to be controlled when passing force forces.
  • CH-A-556 930 has been proposed for less strain on the weft yarn 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 thereon, wear-resistant support member.
  • the proposed in CH-A-556 930 embodiment is characterized in that the support member held by its shape and the elasticity of the soft elastic pad (clamped) and thereby a Auswech- 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 according to the present invention ensures safe, trouble-free and low-wear operation even at high speeds of rotation of the weaving machine.
  • the torsion bar displaced slightly, but is still arranged between the two oppositely poled permanent magnets, so that a deflection of the permanent magnet 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.
  • An alternative, very advantageous embodiment of the invention is when the clamping tongue is pivotable by a further spring substantially transversely to the axis of Torsi- onsstabes, abuts by the bias of the other spring to the jaw and by twisting the Torsionsstabes of the
  • 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 by the fact that the lever, Nockenlich. Sliding link is formed as a section-wise flattening or equally effective training of the torsion bar, which engages the clamping jaw in engagement with the clamping tongue to 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.
  • FIG. 1 shows a representation of a gripper according to the invention
  • Figure 2 is a view along the section A-A of FIG.
  • Figure 3 is a representation along the section B-B of Figure 1;
  • Figure 4 is a schematic representation of such a gripper according to the
  • Figure 5 is a schematic representation of such a gripper according to a second embodiment of the present invention. Ways to carry out the invention
  • FIGS 1 to 3 show a gripper to this embodiment.
  • the gripper arranged on a gripper belt or on a gripper bar 18 and guided along the shed 13 has a housing, a clamping part with a clamping tongue 3 and an actuating lug 4 for manual or mechanical actuation 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 of the
  • Clamping jaw 17 is released and thereby releases the weft thread 12 or allows the weft thread to get into the clamping part 11.
  • 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
  • the clamping force is set according to the characteristics of a weft thread.
  • 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)

Abstract

The invention proceeds from a gripper weaving machine, 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) and a clamping jaw. The movable clamping tongue (3) is prestressed in the clamping position by means of a prestressing spring which is configured as a torsion rod (1), and can be opened by means of magnet devices (6, 7) along the sliding track. The effect of the magnet devices (6, 7) is a rotation of the torsion rod (1), wherein the rotation counter to the prestress releases the clamping tongue from the clamping jaw.

Description

Greifer und Schussfadeneintraqvorrichtunq für eine Greiferwebmaschine Technisches Gebiet  Gripper and weft infeed device for a rapier weaving machine. Technical field
Die Erfindung betrifft einen Greifer für eine Greiferwebmaschine gemäss dem Oberbegriff von Anspruch 1. Weiterhin betrifft die Erfindung eine Schussfaden- eintragvorrichtung 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 Technik State of the art
Bei Greiferwebmaschinen wird der Schussfaden üblicherweise von einem Bring- greifer 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 weaving machines, the weft thread is usually introduced into the shed from one side by a gripper and then - usually approximately in the middle of the shed - handed over to a holgreifer who then pulls the weft thread out of 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 Torsionsfe- der als Torsionsstabfeder so auszubilden, dass sie an einem Ende mit dem From WO 2000/070136 A a gripper for entering 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. In WO 2000/070136 A, it is proposed to design the torsion springs as a torsion bar spring in such a way that they terminate at one end with the torsion bar spring
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.  Shaft part is rotatably connected 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 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 on the picking frequency of weft threads since WO 2000/070136 A have increased considerably, do that such a solution no longer seems 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 Füh- rungselementen für den Bringgreifer und den Holgreifer ein Öffnen bzw. Schlies- sen 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 steuer- baren Krafteinwirkungen leicht eine Strapazierung des Schussfadens bewirken können. From EP-A-0 690 160 a different type of weft insertion device is known, in which permanent magnets are provided for the gripping elements, which are mounted on the guide by correspondingly arranged electromagnetic devices. tion elements for the Bringgreifer and the Holgreifer controlled opening or closing of the gripper heads effect. However, the gripper device of EP-A-0 690 160 is - like other gripper devices with permanent magnets but has the disadvantage that can easily cause a stress on the weft thread by the difficult to be controlled when passing force forces.
In der CH-A-556 930 wurde zur geringeren Strapazierung des Schussfadens vorgeschlagen, einen Greifer mit einem beweglichen Klemmteil und einem ortsfes- ten 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 Auswech- sein oder Entfernen des Auflageteils ermöglicht wird . In der Praxis haben sich damit aber Probleme ergeben, insbesondere in Bezug auf den Verschleiss. In CH-A-556 930 has been proposed for less strain on the weft yarn 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 thereon, wear-resistant support member. The proposed in CH-A-556 930 embodiment is characterized in that the support member held by its shape and the elasticity of the soft elastic pad (clamped) and thereby a Auswech- or removal of the support member is made possible. In practice, however, have problems with it, especially in terms of wear.
Darstellung der Erfindung Presentation 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, stö- rungs- 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 according to the present invention ensures safe, trouble-free and low-wear operation even at high speeds of rotation of the weaving machine.
Vorteilhafte Ausgestaltungen des Greifers gemäss der vorliegenden Erfindung sind in den Ansprüchen 2 bis 11 beschrieben. 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. 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 Dauer- magnete 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. Advantageous embodiments of the gripper according to the present invention are described in claims 2 to 11. 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. 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 oppositely poled permanent magnets, so that a deflection of the permanent magnet 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 Vor- spannen 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 for adjusting 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 Torsi- onsstabes schwenkbar ist, durch die Vorspannung der weiteren Feder an der Klemmbacke anliegt und durch ein Verdrehen des Torsionsstabes von der An alternative, very advantageous embodiment of the invention is when the clamping tongue is pivotable by a further spring substantially transversely to the axis of Torsi- onsstabes, abuts by the bias of the other spring to the jaw and by twisting the Torsionsstabes of the
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-, Nockenbzw. Kulissenmittel als abschnittsweise Abflachung oder gleichwirkende Ausbil- dung 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. 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. Jaw is solvable. 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 by the fact that the lever, Nockenbzw. Sliding link is formed as a section-wise flattening or equally effective training of the torsion bar, which engages the clamping jaw in engagement with the clamping tongue to 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. 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 Zeichnungen Brief description of the drawings
Ausführungsbeispiele der Erfindung werden anhand schematischer Zeichnungen nachfolgend näher beschrieben, dabei zeigen :  Exemplary embodiments of the invention will be described in more detail below with reference to schematic drawings, in which:
Figur 1 eine Darstellung eines erfindungsgemässen Greifers gemäss 1 shows a representation of a gripper according to the invention
ersten Ausführungsbeispiel der vorliegenden Erfindung;  first embodiment of the present invention;
Figur 2 eine Darstellung entlang des Schnittes A-A aus Fig Figure 2 is a view along the section A-A of FIG
Figur 3 eine Darstellung entlang des Schnittes B-B aus Figur 1; Figure 3 is a representation along the section B-B of Figure 1;
Figur 4 eine schematische Darstellung eines solchen Greifers gemäss den Figure 4 is a schematic representation of such a gripper according to the
Figuren 1 bis 3;  FIGS. 1 to 3;
Figur 5 eine schematische Darstellung eines solchen Greifers gemäss einem zweiten Ausführungsbeispiel der vorliegenden Erfindung. Wege zur Ausführung der Erfindung Figure 5 is a schematic representation of such a gripper according to a second embodiment of the present invention. Ways 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 ange- ordnete 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, reference is made to Figures 1 to 3, which show a gripper to this embodiment. The gripper arranged on a gripper belt or on a gripper bar 18 and guided along the shed 13 has a housing, a clamping part with a clamping tongue 3 and an actuating lug 4 for manual or mechanical actuation 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 gegen- förmig 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 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 of the
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 (Motor- einheit) 16 aus dem Wirkbereich des Dauermagneten 7 entschwunden ist, erfolgt die Rückstellung der Klemmzunge aufgrund der Vorspannung des Torsionsstabes 1. Im Regelfall wird die Klemmkraft entsprechen den Eigenschaften eines Schussfadens eingestellt. Clamping jaw 17 is released 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 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, which is shown schematically in Figure 5, 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 in (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 or the weft thread allows to get into the clamping part. 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.
Bezuqszeichenliste LIST OF REFERENCES
1 Torsionsstab  1 torsion bar
2 Abstützung  2 support
3 Klemmzunge  3 clamping tongue
4 Betätigungslasche 4 actuating tab
5 Anschlag  5 stop
6 Magnetträger  6 magnetic carrier
7 Auslösemagnet (stationärer Magnet jeweils an den  7 release magnet (stationary magnet each to the
Wendepunkten)  Turning points)
8 Blattträger 8 leaf carriers
11 Klemmteil  11 clamping part
12 Schussfaden  12 weft
13 Webfach  13 shed
14 Greifermagnet anziehend  14 gripper magnet attractive
15 Greifermagnet abstossend 15 repulsive gripper magnet
16 Magneteinheit mit den Magneten 14 und 15 16 magnet unit with the magnets 14 and 15
17 Klemmbacke 17 jaw
18 Greiferband und Greiferstange  18 Gripper band and rapier rod
23 Hebel bzw. Nocke oder Kulisse 23 lever or cam or backdrop
24 Klemmzunge als Hebel 24 clamping tongue as a lever
25 Lagerung bzw. Einspannung der Klemmzunge  25 Storage or clamping of the clamping tongue

Claims

Patentansprüche claims
1. Greifer für eine Greiferwebmaschine mit einer Gleitbahn, längs deren der Greifer aus einer Aufnahmeposition für einen Schussfaden in eine Übergabeposition oder aus der Übergabeposition in eine Abgabeposition für den Schussfaden hin und her bewegbar ist, wobei der Greifer eine Fadenklemme mit einer beweglichen Klemmzunge (3, 24) und einer Klemmbacke aufweist, wobei die bewegliche Klemmzunge (3, 24) mittels eines Feder- elementes in eine Klemmstellung vorgespannt ist, wodurch die Klemmzunge (3, 24) und die Klemmbacke (17) als Fadenklemme zusammenwirken, und wobei die Klemmzunge (3, 24) mit einem Torsionsstab (1) so wirkverbunden ist, dass sie beim Verdrehen des Torsionsstabes (1) von der Klemmbacke (17) lösbar ist, dadurch gekennzeichnet, dass die Faden- klemme weiterhin Dauermagneteinrichtungen (6, 14, 15) aufweist, die längs der Gleitbahn durch Zusammenwirken mit entsprechenden, an der Gleitbahn angeordneten Gegenmagneten (7) ein Verdrehen des Torsionsstabes (1) und ein Lösen der Klemmzunge (3, 24) von der Klemmbacke (17) bewirken können. 1. Gripper for a rapier with a slideway along which the gripper from a receiving position for a weft yarn in a transfer position or from the transfer position to a delivery position for the weft yarn is movable back and forth, wherein the gripper a thread clamp with a movable clamping tongue (3 , 24) and a clamping jaw, wherein the movable clamping tongue (3, 24) is biased by a spring element into a clamping position, whereby the clamping tongue (3, 24) and the clamping jaw (17) cooperate as a thread clamp, and wherein the clamping tongue (3, 24) is operatively connected to a torsion bar (1) so that it can be released from the clamping jaw (17) during rotation of the torsion bar (1), characterized in that the thread clamp further comprises permanent magnet devices (6, 14, 15). has, along the slide by interaction with corresponding, arranged on the slide counter-magnets (7), a twisting of the torsion bar (1) and a Lös en the clamping tongue (3, 24) of the jaw (17) can cause.
2. Greifer nach Anspruch 1, dadurch gekennzeichnet, dass ein Betätigungsorgan (4) zum Verdrehen des Torsionsstabes (1) unabhängig von den Dauermagneteinrichtungen (6, 14, 15) für ein Lösen der Klemmzunge (3) von der Klemmbacke (17) vorgesehen ist. 2. Gripper according to claim 1, characterized in that an actuating member (4) for rotating the torsion bar (1) independently of the permanent magnet means (6, 14, 15) for releasing the clamping tongue (3) of the clamping jaw (17) is provided ,
3. Greifer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Klemmbacke als feste Klemmbacke (17) ausgebildet ist. 3. Gripper according to claim 1 or 2, characterized in that the clamping jaw is designed as a fixed clamping jaw (17).
4. Greifer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Torsionsstab (1) in einem Gehäuse angeordnet ist. 4. Gripper according to one of claims 1 to 3, characterized in that the torsion bar (1) is arranged in a housing.
5. Greifer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Dauermagneteinrichtungen (6, 14, 15) zwei gegenförmig gepolte Dau- ermagnete (14, 15) umfassen, zwischen denen der Torsionsstab (1) so angeordnet ist, dass ein Auslenken der Dauermagnete (14, 15) ein Verdrehen des Torsionsstabes (1) zur Folge hat. 5. Gripper according to one of claims 1 to 4, characterized in that the permanent magnet means (6, 14, 15) two oppositely poled Dau- Magnets (14, 15), between which the torsion bar (1) is arranged so that a deflection of the permanent magnets (14, 15) has a twisting of the torsion bar (1) result.
6. Greifer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Dauermagneteinrichtungen (6, 14, 15) zwei gegenförmig gepolte Dauermagnete (14, 15) jeweils mit Verlängerungselementen umfassen, zwischen deren Verlängerungselementen der Torsionsstab (1) so angeordnet ist, dass ein Auslenken der Dauermagnete (6) ein Verdrehen des Torsionsstabes (1) zur Folge hat. 6. Gripper according to one of claims 1 to 4, characterized in that the permanent magnet means (6, 14, 15) comprise two counter-poled permanent magnets (14, 15) each with extension elements, between the extension elements of the torsion bar (1) is arranged so in that a deflection of the permanent magnets (6) results in a twisting of the torsion bar (1).
7. Greifer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Klemmzunge (3) direkt mit dem Torsionsstab (1) verbunden und im wesentlichen in der Achse des Torsionsstabes (1) verdrehbar ist, durch die Vorspannung an der Klemmbacke (17) anliegt und durch ein Verdrehen des Torsionsstabes (1) von der Klemmbacke lösbar ist. 7. Gripper according to one of claims 1 to 6, characterized in that the clamping tongue (3) directly to the torsion bar (1) and substantially in the axis of the torsion bar (1) is rotatable by the bias on the jaw (17 ) is applied and by a twisting of the torsion bar (1) of the jaw is releasable.
8. Greifer nach Anspruch 7, dadurch gekennzeichnet, dass Mittel zum Vorspannen des Torsionsstabes (1) und damit zum Einstellen der Klemmkraft vorgesehen sind . 8. Gripper according to claim 7, characterized in that means for biasing the torsion bar (1) and thus are provided for adjusting the clamping force.
9. Greifer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Klemmzunge (24) im wesentlichen quer zur Achse des Torsionsstabes (1) schwenkbar ist, durch die Vorspannung einer weiteren Feder an der Klemmbacke (17) anliegt und durch ein Verdrehen des Torsionsstabes von der Klemmbacke (17) lösbar ist. 9. 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 bar (1) by the bias of another spring against the jaw (17) and by a rotation of the torsion bar of the jaw (17) is releasable.
10. Greifer nach Anspruch 9, dadurch gekennzeichnet, dass der Torsionsstab (1) Hebel-, Nocken- bzw. Kulissenmittel (23) aufweist, die durch ein Verdrehen des Torsionsstabes (1) die Klemmzunge (24) gegen deren Vorspannung schwenkt und von der Klemmbacke (17) löst. Greifer nach Anspruch 10, dadurch gekennzeichnet, dass die Hebel-, Nocken- bzw. Kulissenmittel (23) als abschnittsweise Abflachung oder gleichwirkende Ausbildung des Torsionsstabes (1) ausgebildet ist, die im Eingriff mit der Klemmzunge (24) diese an die Klemmbacke (17) anliegen lässt. 10. Gripper according to claim 9, characterized in that the torsion bar (1) lever, cam or sliding means (23) which pivots by a rotation of the torsion bar (1) the clamping tongue (24) against the bias and of the Clamping jaw (17) releases. Gripper according to claim 10, characterized in that the lever, cam or slide means (23) is designed as a section-wise flattening or equivalent design of the torsion bar (1) which engages with the clamping tongue (24) on 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
PCT/EP2011/053344 WO2011144368A2 (en) 2010-05-18 2011-03-04 Gripper and weft-thread insertion device for a gripper weaving machine
EP11707403.9A EP2572022B1 (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 true EP2572022A2 (en) 2013-03-27
EP2572022B1 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

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* 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 Gripper and a weft insertion device for a rapier weaving machine
DE29908675U1 (en) 1999-05-17 1999-08-12 Textilma Ag 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
WO2009026732A1 (en) * 2007-08-28 2009-03-05 Textilma Ag Gripper and weft-thread insertion apparatus for a gripper weaving machine

Non-Patent Citations (1)

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Title
See references of WO2011144368A2 *

Also Published As

Publication number Publication date
BR112012029307A2 (en) 2016-07-26
WO2011144368A3 (en) 2012-01-19
CN103003479B (en) 2014-05-07
EP2572022B1 (en) 2015-10-28
EP2388361A1 (en) 2011-11-23
CN103003479A (en) 2013-03-27
HK1178578A1 (en) 2013-09-13
WO2011144368A2 (en) 2011-11-24

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