EP1972705A1 - Accelerating device for a loom - Google Patents

Accelerating device for a loom Download PDF

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Publication number
EP1972705A1
EP1972705A1 EP08010050A EP08010050A EP1972705A1 EP 1972705 A1 EP1972705 A1 EP 1972705A1 EP 08010050 A EP08010050 A EP 08010050A EP 08010050 A EP08010050 A EP 08010050A EP 1972705 A1 EP1972705 A1 EP 1972705A1
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EP
European Patent Office
Prior art keywords
piston
shuttle
acceleration device
weft
guide element
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.)
Withdrawn
Application number
EP08010050A
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German (de)
French (fr)
Inventor
Markus Farner
Alex Simeon
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Itema Switzerland Ltd
Original Assignee
Sultex AG
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Filing date
Publication date
Application filed by Sultex AG filed Critical Sultex AG
Priority to EP08010050A priority Critical patent/EP1972705A1/en
Publication of EP1972705A1 publication Critical patent/EP1972705A1/en
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—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
    • D03D47/24—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 by gripper or dummy shuttle
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/24—Mechanisms for inserting shuttle in shed
    • D03D49/42—Mechanisms for inserting shuttle in shed whereby the shuttle is propelled by liquid or gas pressure
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/24—Mechanisms for inserting shuttle in shed
    • D03D49/44—Mechanisms for inserting shuttle in shed whereby the shuttle is propelled by electric or magnetic means

Definitions

  • an acceleration device for the at least one weft thread guiding element can be provided on one or both sides of the shed. From projectile weaving machines, different embodiments of accelerating devices are already known.
  • the present invention has for its object to provide an accelerating device with which the performance of a weaving machine can be significantly increased.
  • the object is achieved with an acceleration device which has a pneumatic cylinder whose piston rod is movable towards one end of the weft guide element and thereby shoots into the shed, wherein the piston rod has a weight of less than 100 g, preferably 20 g.
  • This embodiment of the acceleration device has the advantage that it has only a few moving parts.
  • the low weight of the piston rod allows a high acceleration of the piston rod by the compressed air and thus a high acceleration of the weft guide element.
  • the acceleration device according to the invention can be arranged above the guide channel and thus be moved over the guide channel in weaving width reduction.
  • the weft guide element can also have a weight of less than 100 g, preferably 20 g, in order to keep its mass to be accelerated low.
  • the piston rod may be at least partially made of a fiber composite material.
  • a fiber composite material For this example, carbon fiber reinforced plastics or ceramics or such materials reinforced by glass fibers or aramid fibers in question. These very light materials are nevertheless sufficiently stable to transmit the acceleration forces of the piston rod to the weft guide element.
  • the pneumatic cylinder can also be designed so that the piston can be accelerated at least partially by the expansion of previously compressed air.
  • the compressed air flow is interrupted by means of at least one fast-switching valve before the whole cylinder is filled.
  • the compressed air expansion can thus reduce energy consumption.
  • the rapid acceleration of the piston also serves a, arranged close to the pneumatic cylinder, can be filled with compressed air pre-chamber, the air of the pre-chamber can be released by means of at least one fast-switching valve. Through the antechamber, the cylinder can be quickly filled with compressed air.
  • the valve may preferably be designed such that it can be opened and closed in a direction of movement of an adjusting member. As a result, it is possible to dispense with a time-intensive reversal of the direction of the adjusting element in order to open and close the valve.
  • a positioner can also be provided which brings the piston into contact with the weft guide element and positions it before it is accelerated.
  • the volume of air between positioner and piston should be kept as small as possible in the end positions. It is an air volume of at most 15 cm 3 , preferably 5-10 cm 3 strive.
  • this embodiment of the acceleration device provides advantages for each type of projectile weaving machines as well as for shuttle looms.
  • a weft thread guide element can be acted upon, which has a clamping device for a weft thread, which is arranged displaceably from one end of the weft thread guide member to the other end. Due to the displaceability of the clamping device, which can be done for example by means of compressed air, the weft waste can be minimized. The weft transfer to the weft guide element can always be done close to the fabric edge. Also, this weft guide element can be used with the same advantages in other weaving machines with positive weft insertion.
  • weft thread guide element can be provided with a lower side, which has a cross-sectionally at least approximately V-shaped contour. With this configuration, the lateral guidance of the weft thread guide element can be facilitated via the guide channel.
  • At least one weft yarn selection device can be used, which has a plurality of adjacent side by side on a circular arc thread pliers with eyelets, which are arranged together pivotable on the circular arc.
  • the thread tongs hold the end of the weft yarns and tension the weft yarns between them and the eyelet, where they can be easily taken over by a clamping device of the weft yarn guide element.
  • the resulting weft waste is minimal.
  • This weft selection device can also be used in rapier looms and also leads there to a drastic reduction of weft waste.
  • Each of the thread tongs can thereby with their thread eyelet from a selection position be above the weft guide element for thread transfer to this down to be pivoted.
  • Fig. 1 shows an accelerator 13 for a weft yarn guide element 12.
  • the device 13 comprises a pneumatic cylinder 21, the piston rod 22 is movable against the rear end of the weft guide element 12 and thereby shoots into the shed.
  • a fast-switching valve can release the air of the prechamber 29.
  • FIGS. 2a to 2f show in longitudinal section the cylinder 21 of the accelerator 13 in different working positions.
  • Fig. 2a shows the piston rod 22 in its initial position.
  • the end piece 22.1 of the piston rod 22 is located behind a fast-switching valve 30, which consists of obliquely directed, distributed over the circumference of the air inlet openings 31 in the housing of the cylinder 21 and a longitudinally displaceable along the cylinder 21 adjusting member 32 in the form of a sleeve.
  • the adjusting member 32 has black marked solid areas 32.1 and 32.2 and arranged therebetween, provided with air passage openings section 32.3. In the in Fig. 2a shown section closes the section 32.2 the openings 31 in the cylinder 21.
  • the adjusting member 32 can be by means of Move compressed air along the cylinder surface.
  • obliquely directed air ducts 34, 35 are provided in a housing 33.
  • a positioner 36 which is displaceable in the interior of the cylinder 21.

Abstract

A projectile shuttle (12) containing permanent magnets is moved through the shed over electrically conducting guide bars (16, 17) so that a repelling force is induced that balances gravity. Alternatively the conductors can be placed in the shuttle and the guide bars are magnetic. The magnetic forces are arranged to also provide a centralizing action on the shuttle. The induced current in the guide bars (16, 17) can be augmented by rotating them with a motor (20) and drive disk (19). Independent claims are included for the following: (1) A loom equipped with the required magnetic and electrically conducting elements, with moving guide bars to provide a V-shaped guide configuration (18); (2) A shuttle projecting device for such a loom, using a compressed air cylinder and placed at each end of the shuttle path, with a piston rod preferably lighter than 20 g.

Description

Bei einer Webmaschine kann ein- oder beidseits des Webfachs eine Beschleunigungsvorrichtung für das mindestens eine Schussfadenführungselement vorgesehen sein. Von Projektilwebmaschinen sind bereits unterschiedliche Ausgestaltungsformen von Beschleunigungsvorrichtungen bekannt.In a weaving machine, an acceleration device for the at least one weft thread guiding element can be provided on one or both sides of the shed. From projectile weaving machines, different embodiments of accelerating devices are already known.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Beschleunigungsvorrichtung bereitzustellen, mit der sich die Leistungsfähigkeit einer Webmaschine deutlich erhöhen lässt. Die Aufgabe wird mit einer Beschleunigungsvorrichtung gelöst, die einen Pneumatikzylinder aufweist, dessen Kolbenstange gegen ein Ende des Schussfadenführungselements bewegbar ist und dieses dadurch in das Webfach schießt, wobei die Kolbenstange ein Gewicht von kleiner 100 g, vorzugsweise von 20 g aufweist. Diese Ausgestaltung der Beschleunigungsvorrichtung hat den Vorteil, dass sie nur wenige bewegte Teile aufweist. Außerdem ermöglicht das geringe Gewicht der Kolbenstange eine hohe Beschleunigung der Kolbenstange durch die Druckluft und damit auch eine hohe Beschleunigung des Schussfadenführungselements. Die erfindungsgemäße Beschleunigungsvorrichtung kann oberhalb des Führungskanals angeordnet und somit bei Webbreitenreduktion über dem Führungskanal verschoben werden.The present invention has for its object to provide an accelerating device with which the performance of a weaving machine can be significantly increased. The object is achieved with an acceleration device which has a pneumatic cylinder whose piston rod is movable towards one end of the weft guide element and thereby shoots into the shed, wherein the piston rod has a weight of less than 100 g, preferably 20 g. This embodiment of the acceleration device has the advantage that it has only a few moving parts. In addition, the low weight of the piston rod allows a high acceleration of the piston rod by the compressed air and thus a high acceleration of the weft guide element. The acceleration device according to the invention can be arranged above the guide channel and thus be moved over the guide channel in weaving width reduction.

Auch das Schussfadenführungselement kann ein Gewicht von kleiner als 100 g, vorzugsweise von 20 g aufweisen, um seine zu beschleunigende Masse gering zu halten.The weft guide element can also have a weight of less than 100 g, preferably 20 g, in order to keep its mass to be accelerated low.

Bei einer bevorzugten Ausgestaltung kann die Kolbenstange zumindest teilweise aus einem Faserverbundwerkstoff hergestellt sein. Hierfür kommen beispielsweise kohlefaserverstärkte Kunststoffe oder Keramiken oder solche Materialien verstärkt durch Glasfasern oder Aramidfasern in Frage. Diese sehr leichten Werkstoffe sind dennoch ausreichend stabil, die Beschleunigungskräfte der Kolbenstange auf das Schussfadenführungselement zu übertragen.In a preferred embodiment, the piston rod may be at least partially made of a fiber composite material. For this example, carbon fiber reinforced plastics or ceramics or such materials reinforced by glass fibers or aramid fibers in question. These very light materials are nevertheless sufficiently stable to transmit the acceleration forces of the piston rod to the weft guide element.

Weitere Vorteile hinsichtlich der Beschleunigung der Kolbenstange können dadurch erzielt werden, dass eine berührungsfreie Dichtung zwischen dem Kolben und dem Zylindergehäuse vorgesehen ist. Diese berührungsfreie und damit reibungsfreie Dichtung kann vorzugsweise durch einen Luftspalt gebildet werden.Further advantages with regard to the acceleration of the piston rod can be achieved by providing a contact-free seal between the piston and the cylinder housing. This non-contact and therefore friction-free seal can preferably be formed by an air gap.

Der Pneumatikzylinder kann auch so ausgebildet werden, dass der Kolben zumindest teilweise durch die Expansion zuvor komprimierter Luft beschleunigbar ist. Dazu wird der Druckluftstrom mittels mindestens eines schnell schaltenden Ventils unterbrochen, bevor der ganze Zylinder gefüllt ist. Durch die Druckluftexpansion kann somit der Energieverbrauch reduziert werden.The pneumatic cylinder can also be designed so that the piston can be accelerated at least partially by the expansion of previously compressed air. For this purpose, the compressed air flow is interrupted by means of at least one fast-switching valve before the whole cylinder is filled. The compressed air expansion can thus reduce energy consumption.

Der schnellen Beschleunigung des Kolbens dient außerdem eine, dicht am Pneumatikzylinder angeordnete, mit Druckluft befüllbare Vorkammer, wobei die Luft der Vorkammer mittels mindestens eines schnell schaltenden Ventils freigebbar sein kann. Durch die Vorkammer lässt sich der Zylinder schnell mit Druckluft befüllen.The rapid acceleration of the piston also serves a, arranged close to the pneumatic cylinder, can be filled with compressed air pre-chamber, the air of the pre-chamber can be released by means of at least one fast-switching valve. Through the antechamber, the cylinder can be quickly filled with compressed air.

Das Ventil kann vorzugsweise derart ausgebildet sein, dass es in einer Bewegungsrichtung eines Verstellgliedes zu öffnen und zu schließen ist. Dadurch kann zum Öffnen und Schließen des Ventils auf eine zeitintensive Richtungsumkehr des Verstellgliedes verzichtet werden.The valve may preferably be designed such that it can be opened and closed in a direction of movement of an adjusting member. As a result, it is possible to dispense with a time-intensive reversal of the direction of the adjusting element in order to open and close the valve.

Um definierte Beschleunigungsverhältnisse für das Schussfadenführungselement zu erhalten, kann außerdem ein Positionierer vorgesehen sein, der den Kolben mit dem Schussfadenführungselement in Kontakt bringt und positioniert, bevor dieses beschleunigt wird. Das Luftvolumen zwischen Positionierer und Kolben soll dabei in den Endpositionen möglichst klein gehalten werden. Es ist ein Luftvolumen von höchstens 15 cm3, vorzugsweise von 5-10 cm3 anzustreben.In order to obtain defined acceleration ratios for the weft guide element, a positioner can also be provided which brings the piston into contact with the weft guide element and positions it before it is accelerated. The volume of air between positioner and piston should be kept as small as possible in the end positions. It is an air volume of at most 15 cm 3 , preferably 5-10 cm 3 strive.

Es versteht sich, dass diese Ausgestaltung der Beschleunigungsvorrichtung Vorteile für jede Art von Projektilwebmaschinen sowie für Schützenwebmaschinen ergibt.It is understood that this embodiment of the acceleration device provides advantages for each type of projectile weaving machines as well as for shuttle looms.

Mit der Beschleunigungsvorrichtung kann ein Schussfadenführungselement beaufschlagbar sein, das eine Klemmvorrichtung für einen Schussfaden aufweist, die von einem Ende des Schussfadenführungselements zum anderen Ende verschiebbar angeordnet ist. Durch die Verschiebbarkeit der Klemmvorrichtung, die beispielsweise mittels Druckluft erfolgen kann, lässt sich der Schussfadenabfall minimieren. Die Schussfadenübergabe an das Schussfadenführungselement kann stets nahe an der Gewebekante erfolgen. Auch dieses Schussfadenführungselement kann mit denselben Vorteilen bei anderen Webmaschinen mit positivem Schussfadeneintrag eingesetzt werden.With the accelerating device, a weft thread guide element can be acted upon, which has a clamping device for a weft thread, which is arranged displaceably from one end of the weft thread guide member to the other end. Due to the displaceability of the clamping device, which can be done for example by means of compressed air, the weft waste can be minimized. The weft transfer to the weft guide element can always be done close to the fabric edge. Also, this weft guide element can be used with the same advantages in other weaving machines with positive weft insertion.

Weiterhin kann das Schussfadenführungselement mit einer Unterseite versehen sein, die eine im Querschnitt mindestens näherungsweise V-förmige Kontur aufweist. Durch diese Ausgestaltung lässt sich die seitliche Führung des Schussfadenführungselements über den Führungskanal erleichtern.Furthermore, the weft thread guide element can be provided with a lower side, which has a cross-sectionally at least approximately V-shaped contour. With this configuration, the lateral guidance of the weft thread guide element can be facilitated via the guide channel.

Zur sicheren Schussfadenübergabe an das Schussfadenführungselement kann mindestens eine Schussfaden-Auswahlvorrichtung eingesetzt werden, die mehrere nebeneinander auf einem Kreisbogen angeordnete Fadenzangen mit Fadenösen aufweist, die gemeinsam auf dem Kreisbogen verschwenkbar angeordnet sind. Die Fadenzangen halten das Ende der Schussfäden und spannen die Schussfäden zwischen sich und der Öse, wo sie leicht von einer Klemmvorrichtung des Schussfadenführungselements übernommen werden können. Der entstehende Schussfadenabfall ist minimal. Diese Schussfaden-auswahlvorrichtung lässt sich auch bei Greifer-Webmaschinen einsetzen und führt dort ebenfalls zu einer drastischen Reduktion des Schussfadenabfalls. Jede der Fadenzangen kann dabei mit ihrer Fadenöse aus einer Auswahlposition über dem Schussfadenführungselement zur Fadenübergabe an dieses nach unten verschwenkbar sein.For secure weft yarn transfer to the weft yarn guide element, at least one weft yarn selection device can be used, which has a plurality of adjacent side by side on a circular arc thread pliers with eyelets, which are arranged together pivotable on the circular arc. The thread tongs hold the end of the weft yarns and tension the weft yarns between them and the eyelet, where they can be easily taken over by a clamping device of the weft yarn guide element. The resulting weft waste is minimal. This weft selection device can also be used in rapier looms and also leads there to a drastic reduction of weft waste. Each of the thread tongs can thereby with their thread eyelet from a selection position be above the weft guide element for thread transfer to this down to be pivoted.

Nachfolgend werden anhand der Zeichnung ein bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen Beschleunigungsvorrichtung näher erläutert.Hereinafter, a preferred embodiment of an acceleration device according to the invention will be explained in more detail with reference to the drawing.

Es zeigen:

Fig. 1
eine Detaildarstellung einer Beschleunigungsvorrichtung für eine Webmaschine;
Fig. 2a - f
einen Querschnitt durch den Pneumatikzylinder der Beschleunigungsvorrichtung aus Fig. 1 in unterschiedlichen Arbeitspositionen
Show it:
Fig. 1
a detailed view of an accelerator device for a weaving machine;
Fig. 2a - f
a cross section through the pneumatic cylinder of the accelerator device Fig. 1 in different working positions

Fig. 1 zeigt eine Beschleunigungsvorrichtung 13 für ein Schussfadenführungselement 12. Die Vorrichtung 13 weist einen Pneumatikzylinder 21 auf, dessen Kolbenstange 22 gegen das hintere Ende des Schussfadenführungselements 12 bewegbar ist und dieses dadurch in das Webfach schießt. Mittels einer möglichst nahe am Zylinder 21 angeordneten Vorkammer 29 kann die schnelle Befüllung des Zylinders sichergestellt werden. Ein schnell schaltendes Ventil kann dabei die Luft der Vorkammer 29 freigeben. Fig. 1 shows an accelerator 13 for a weft yarn guide element 12. The device 13 comprises a pneumatic cylinder 21, the piston rod 22 is movable against the rear end of the weft guide element 12 and thereby shoots into the shed. By means of a close to the cylinder 21 arranged pre-chamber 29, the rapid filling of the cylinder can be ensured. A fast-switching valve can release the air of the prechamber 29.

Die Figuren 2a bis 2f zeigen im Längsschnitt den Zylinder 21 der Beschleunigungsvorrichtung 13 in unterschiedlichen Arbeitspositionen. Fig. 2a zeigt dabei die Kolbenstange 22 in ihrer Ausgangsposition. Das Endstück 22.1 der Kolbenstange 22 befindet sich hinter einem schnell schaltenden Ventil 30, das aus schräg gerichteten, über den Umfang verteilten Lufteintrittsöffnungen 31 im Gehäuse des Zylinders 21 und einem längs des Zylinders 21 verschiebbaren Verstellglied 32 in Form einer Hülse besteht. Das Verstellglied 32 weist schwarz eingezeichnete, massiv ausgebildete Bereiche 32.1 und 32.2 sowie einen dazwischen angeordneten, mit Luftdurchtrittsöffnungen versehenen Abschnitt 32.3 auf. In der in Fig. 2a gezeigten Position verschließt der Abschnitt 32.2 die Öffnungen 31 im Zylinder 21. Das Verstellglied 32 lässt sich mittels Druckluft längs der Zylinderoberfläche verschieben. Dazu sind in einem Gehäuse 33 schräg gerichtete Luftkanäle 34, 35 vorgesehen. Gegen das Endstück 22.1 der Kolbenstange 22 liegt ein Positionierer 36 an, der im Inneren des Zylinders 21 verschiebbar ist.The FIGS. 2a to 2f show in longitudinal section the cylinder 21 of the accelerator 13 in different working positions. Fig. 2a shows the piston rod 22 in its initial position. The end piece 22.1 of the piston rod 22 is located behind a fast-switching valve 30, which consists of obliquely directed, distributed over the circumference of the air inlet openings 31 in the housing of the cylinder 21 and a longitudinally displaceable along the cylinder 21 adjusting member 32 in the form of a sleeve. The adjusting member 32 has black marked solid areas 32.1 and 32.2 and arranged therebetween, provided with air passage openings section 32.3. In the in Fig. 2a shown section closes the section 32.2 the openings 31 in the cylinder 21. The adjusting member 32 can be by means of Move compressed air along the cylinder surface. For this purpose, obliquely directed air ducts 34, 35 are provided in a housing 33. Against the end piece 22.1 of the piston rod 22 is located on a positioner 36, which is displaceable in the interior of the cylinder 21.

In Fig. 2b ist die Kolbenstange 22 durch den Positionierer 36 nach vorn verschoben worden, bis das Endstück 22.1 der Kolbenstange 22 vor den Öffnungen 31 in Zylinder 21 zu liegen kommt. Anschließend wird das Verstellglied 32 nach vorn verschoben, sodass der Abschnitt 32.3 die Öffnungen 31 in Zylinder 21 freigibt und Druckluft in den Zylinder einströmen kann. Der Kolben 22 wird dadurch beschleunigt, wie Fig. 2c zeigt.In Fig. 2b the piston rod 22 has been displaced forward by the positioner 36 until the end piece 22.1 of the piston rod 22 comes to rest in front of the openings 31 in the cylinder 21. Subsequently, the adjusting member 32 is moved forward, so that the section 32.3 the openings 31 in cylinder 21 releases and compressed air can flow into the cylinder. The piston 22 is thereby accelerated, as Fig. 2c shows.

Nachdem der Kolben 22 das hier nicht dargestellte Schussfadenführungselement beschleunigt hat, wird das Verstellglied 32 weiter nach vorn verschoben, bis sein Abschnitt 32.2 die Öffnungen 31 wieder verschließt. Diese Position ist in Fig. 2d gezeigt. Durch die Komprimierung der Luft zwischen dem Endstück 22.1 und dem vorderen Ende des Zylinders 21 wird der Kolben abgebremst. Danach wird der Positionierer 36 wieder in Ausgangsposition zurückgefahren. Der Kolben 22 bewegt sich durch die zwischen dem Endstück 22.2 und dem vorderen Ende des Zylinders 21 komprimierte Luft selbsttätig nach hinten. Die zwischen dem Endstück 22.2 des Kolbens 22 und dem Positionierer 36 vorhandene Luft kann beim Zurückbewegen des Kolbens 22 durch axiale Öffnungen im Positionierer 36 entweichen. Diese Bewegung des Kolbens 22 ist in Fig. 2e dargestellt. Schließlich wird wieder die in Fig. 2f gezeigte Ausgangsposition von Kolben 22 und Positionierer 36 erreicht. Diese Position entspricht bis auf die Stellung des Verstellgliedes 32 der in Fig. 2a gezeigten Position. Das Verstellglied 32 befindet sich jetzt in seiner vordersten Position und wird beim nächsten Beschleunigen des Kolbens 22 zum Schalten des Ventils 30 längs des Zylinders 21 nach hinten bewegt.After the piston 22 has accelerated the weft yarn guide element, not shown here, the adjusting member 32 is further displaced forward until its section 32.2 closes the openings 31 again. This position is in Fig. 2d shown. By compressing the air between the end piece 22.1 and the front end of the cylinder 21, the piston is braked. Thereafter, the positioner 36 is moved back to the starting position. The piston 22 moves automatically through the air compressed between the end piece 22. 2 and the front end of the cylinder 21 to the rear. The existing between the end 22.2 of the piston 22 and the positioner 36 air can escape when moving back the piston 22 through axial openings in the positioner 36. This movement of the piston 22 is in Fig. 2e shown. Finally, the in Fig. 2f shown starting position of the piston 22 and positioner 36 reaches. This position corresponds to the position of the adjusting member 32 in Fig. 2a shown position. The adjusting member 32 is now in its foremost position and is moved to the rear of the cylinder 21 during the next acceleration of the piston 22 for switching the valve 30.

Claims (8)

Beschleunigungsvorrichtung für eine Webmaschine, dadurch gekennzeichnet, dass sie einen Pneumatikzylinder (21) aufweist, dessen Kolbenstange (22) gegen ein Ende des Schussfadenführungselements (12) bewegbar ist und dessen Kolbenstange (22) ein Gewicht von kleiner oder gleich 20 g aufweist und mindestens zum Teil aus einem Faserverbundwerkstoff gefertigt ist.Accelerator device for a weaving machine, characterized in that it comprises a pneumatic cylinder (21), the piston rod (22) against one end of the weft yarn guide element (12) is movable and the piston rod (22) has a weight of less than or equal to 20 g and at least for Part is made of a fiber composite material. Beschleunigungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie eine berührungsfreie Dichtung zwischen dem Kolben (22) und dem Zylindergehäuse aufweist.Acceleration device according to claim 1, characterized in that it comprises a non-contact seal between the piston (22) and the cylinder housing. Beschleunigungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Kolben (22) zumindest teilweise durch die Expansion zuvor komprimierter Luft beschleunigbar ist.Acceleration device according to claim 1 or 2, characterized in that the piston (22) is at least partially accelerated by the expansion of previously compressed air. Beschleunigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie eine dicht am Pneumatikzylinder (21) angeordnete, mit Druckluft befüllbare Vorkammer (29) aufweist.Acceleration device according to one of the preceding claims, characterized in that it has a close to the pneumatic cylinder (21) arranged, filled with compressed air pre-chamber (29). Beschleunigungsvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Luft der Vorkammer (29) mittels mindestens eines schnell schaltenden Ventils (30) freigebbar ist.Acceleration device according to claim 4, characterized in that the air of the pre-chamber (29) by means of at least one fast-switching valve (30) is releasable. Beschleunigungsvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass das Ventil (30) in einer Bewegungsrichtung eines Verstellgliedes (32) zu öffnen und schließen ist.Acceleration device according to claim 5, characterized in that the valve (30) in a direction of movement of an adjusting member (32) to open and close. Beschleunigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Positionierer (36) vorgesehen ist, der den Kolben (22) mit dem Schussfadenführungselement (12) in Kontakt bringt.Acceleration device according to one of the preceding claims, characterized in that a positioner (36) is provided which brings the piston (22) with the weft thread guide element (12) in contact. Beschleunigungsvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass nach Inkontaktbringen und Positionieren von Kolben (22) und Schussfadenführungselement (12) das Luftvolumen zwischen Positionierer und Kolben möglichst klein ist, höchstens aber 15 cm3 beträgt.Acceleration device according to claim 7, characterized in that after contacting and positioning of piston (22) and weft thread guide element (12), the volume of air between the positioner and piston is as small as possible, but at most 15 cm 3 .
EP08010050A 2005-10-01 2006-09-29 Accelerating device for a loom Withdrawn EP1972705A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08010050A EP1972705A1 (en) 2005-10-01 2006-09-29 Accelerating device for a loom

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05021549A EP1777330A1 (en) 2005-10-01 2005-10-01 Method for supporting a weft guide element
EP06805955A EP1943378A2 (en) 2005-10-01 2006-09-29 Method for supporting a weft thread guiding element
EP08010050A EP1972705A1 (en) 2005-10-01 2006-09-29 Accelerating device for a loom

Related Parent Applications (1)

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EP06805955A Division EP1943378A2 (en) 2005-10-01 2006-09-29 Method for supporting a weft thread guiding element

Publications (1)

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EP1972705A1 true EP1972705A1 (en) 2008-09-24

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EP05021549A Withdrawn EP1777330A1 (en) 2005-10-01 2005-10-01 Method for supporting a weft guide element
EP08010050A Withdrawn EP1972705A1 (en) 2005-10-01 2006-09-29 Accelerating device for a loom
EP06805955A Withdrawn EP1943378A2 (en) 2005-10-01 2006-09-29 Method for supporting a weft thread guiding element

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EP05021549A Withdrawn EP1777330A1 (en) 2005-10-01 2005-10-01 Method for supporting a weft guide element

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EP06805955A Withdrawn EP1943378A2 (en) 2005-10-01 2006-09-29 Method for supporting a weft thread guiding element

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EP (3) EP1777330A1 (en)
CN (2) CN101331254A (en)
WO (1) WO2007039244A2 (en)

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CN110184726B (en) * 2019-05-31 2021-04-20 佛山市杰德纺织有限公司 Picking mechanism of loom
DE102019130773A1 (en) * 2019-11-14 2021-05-20 Kkv Gmbh & Co. Kg Improved Apparatus and Methods for Making a Fabric
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Also Published As

Publication number Publication date
CN101338471A (en) 2009-01-07
WO2007039244A3 (en) 2007-10-11
EP1943378A2 (en) 2008-07-16
EP1777330A1 (en) 2007-04-25
WO2007039244A2 (en) 2007-04-12
CN101331254A (en) 2008-12-24

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