EP1541730B1 - Weaving loom - Google Patents

Weaving loom Download PDF

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Publication number
EP1541730B1
EP1541730B1 EP03028269A EP03028269A EP1541730B1 EP 1541730 B1 EP1541730 B1 EP 1541730B1 EP 03028269 A EP03028269 A EP 03028269A EP 03028269 A EP03028269 A EP 03028269A EP 1541730 B1 EP1541730 B1 EP 1541730B1
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EP
European Patent Office
Prior art keywords
air
weaving machine
gripper bar
machine according
drive wheel
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP03028269A
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German (de)
French (fr)
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EP1541730A1 (en
Inventor
Angelo Stacher
Theo Thalmann
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m-tec Arbon AG
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m-tec Arbon AG
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Priority to EP03028269A priority Critical patent/EP1541730B1/en
Priority to AT03028269T priority patent/ATE321161T1/en
Priority to DE50302727T priority patent/DE50302727D1/en
Publication of EP1541730A1 publication Critical patent/EP1541730A1/en
Application granted granted Critical
Publication of EP1541730B1 publication Critical patent/EP1541730B1/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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/273—Rapier rods
    • 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
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels
    • 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

Definitions

  • the invention relates to a weaving machine with a rapier rod, which is in engagement with a drive wheel and is reversibly driven by this, and with a pneumatic guide means for guiding and supporting the gripper bar.
  • a rapier rod in a weaving machine is used to enter the weft thread in the warp thread system.
  • two gripper bars are provided in the weaving machine, which are arranged on both sides of the fabric to be produced.
  • the gripper bars are coordinated with each other reversing in a substantially horizontal direction. The higher the speed of the gripper bar, the higher the weaving performance of the weaving machine.
  • the guiding and storing of the gripper bar is therefore of decisive importance in a weaving machine.
  • the guide device must ensure precise guidance for precise insertion and transfer of the weft thread and, on the other hand, permit a high speed of movement of the rapier rod.
  • conventional roller bearings provide precise guidance.
  • at higher speeds results due to the existing Friction considerable heat generation and frictional wear, which limit the speed of the gripper bar.
  • From DE-A-39 16 591 or DE-A-19 07 622 is known to provide pneumatic guide means for guiding the gripper systems for weft insertion.
  • a generic loom with a pneumatic guide device is apparent from EP O 866 156 B1, in which an air bearing in the region of the point of engagement of the drive wheel is arranged opposite this.
  • the invention has for its object to provide a loom, in which both a good leadership property for a rapier and a low energy consumption are given.
  • the loom according to the invention is characterized in that the pneumatic guide means comprises at least two mutually separately mounted air bearings, which are spaced from the engagement point of the drive wheel.
  • a basic idea of the invention is based on the recognition that the gripper bar is exposed to considerable dynamic loads, especially at higher speeds of movement, which have an influence on the pneumatic guide device.
  • the usual length of a rapier bar between 1m to 3m, with special looms even greater lengths are achieved. Due to this length as well as resulting in the reversing movement of the gripper bar times to one side and sometimes to the other side of the drive wheel, there are changing deflections of the gripper bar, which are particularly noticeable in the drive wheel.
  • These deflections can in a pneumatic bearing in the region of the point of engagement, as taught for example in the generic document, periodic changes in the air gap between rapier rod and the air bearing by itself. This not only leads to increased compressed air and thus energy consumption, but can also affect the exact guidance of the gripper bar.
  • the air bearings have housing, which are pivotally mounted, in particular spherical.
  • the respective housings of the air bearings are preferably deflectable about an axis which is directed transversely to the longitudinal axis of the gripper bar.
  • a spherical bearing, recordable by means of a ball joint, relative to the machine frame additionally allows the compensation of torsions of the weft insertion member.
  • a compensation of the bends of the gripper bar is improved according to the invention in that the air bearings are arranged on the side of the gripper bar, which faces away from the drive wheel.
  • the air bearings are arranged symmetrically to the point of entry.
  • the distance between the gripper bar and the air duct can be set very small.
  • the deflection of the gripper bar can be counteracted, thereby improving the guidance accuracy and thus can further increase the speed of movement.
  • a further preferred embodiment of the invention is that the air bearings are arranged on opposite flanks of the gripper bar.
  • the air bearings may be opposite to each other in pairs and arranged along the approximately vertically extending flanks of the gripper bar. In this embodiment, therefore, only a lateral guide is given, while the drive wheel would substantially absorb the bearing forces.
  • the side air bearings can not only be alone, but also be provided in combination with the arrangement of the air bearing set forth above on the side facing away from the drive wheel side of the gripper bar, which contributes to a particularly accurate guidance.
  • the air bearing has a guide surface which is provided with a porous air-permeable material.
  • a porous air-permeable element arranged substantially over the entire guide surface, which allows a uniform passage of air over this surface.
  • Such an element may be, for example, an air-permeable membrane, a porous plastic or a porous ceramic, which preferably also ensure sufficient emergency running properties when the compressed air supply is interrupted.
  • an air consumption is adjustable, regardless of a gap width between air bearing and gripper bar.
  • a change in the gap width between gripper bar and guide surface plays virtually no role.
  • such an air bearing is also distinguished by the fact that no constant force is exerted on the gripper bar. Rather, the force effect only comes about when the rapier rod approaches the guide below a minimum, for example 0.1 mm. This ensures that the arranged guides do not deform the rods additionally.
  • a compressed air source is provided, which is connected to the air bearings for supplying a constant amount of air at a predetermined pressure. Due to the special design of the air bearings can in principle even be dispensed with a complex control of compressed air supply, without resulting in an uneconomical high compressed air consumption.
  • the gripper bar is formed of a carbon material.
  • a carbon material is particularly light with a high strength and stability, which contributes to a low inertia of the gripper bar.
  • pneumatic guide device provision is made for a porous, air-permeable material to be arranged on the guide surface.
  • a pneumatic guide device can also be used for other purposes.
  • an elongated rapier rod 10 is provided which, as shown in FIG. 2, is rectangular in cross section and formed with a toothing 11 on its underside.
  • This linear toothing 11 is in meshing connection with the external toothing of a drive wheel 16, which is driven by a motor, not shown.
  • the gripper bar 10 can be reversibly moved to both sides, wherein in Fig. 1, an approximately central position of the gripper bar 10 is shown.
  • a non-illustrated, well-known gripping system for gripping and entering a weft thread is arranged.
  • air bearings 22a, 22b are arranged on both sides of this engagement point, which together form a guide device 20 for guiding and supporting the rapier rod 10. Structure and function of the two same air bearings 22a and 22b are explained in more detail below in connection with FIG.
  • the air bearing 22 has a housing 24 which is adjustably mounted on a machine frame 5.
  • a screw bolt 7 is screwed, which penetrates the housing 24.
  • a ball sleeve 25 is arranged, which is braced by means of a spacer sleeve 9 between the head of the bolt 7 and the base frame 5.
  • the ball sleeve 9 forms with a correspondingly shaped bearing ring 26 which is fixed in a receiving bore in the housing 24, a spherical bearing.
  • adjusting screws 3 are provided in the machine frame 5, with which a lateral inclination of the housing 24 can be adjusted.
  • a compressed air channel 27 which is fed by a compressed air source and opens into an outlet opening 28. This extends almost along the entire underside of the housing 24.
  • the outlet opening 28 is covered by a porous air-permeable material, not shown, which forms a flat guide surface 30 which extends parallel to the top of the rapier bar 10 to form an air gap or air cushion.
  • FIG. 3 shows an alternative embodiment in which the air bearings 22a, 22b are arranged on the lateral flanks 14 of the rapier bar 10.
  • the drive wheel 16 also serves as a kind of support to accommodate the weight of the gripper bar 10.
  • FIGS. 4 a and 4 b the problem of the deflection of the rapier bar 10 in the course of operation is once again graphically illustrated. Due to the considerable length of the gripper bar 10 results in the operating position shown in FIG. 4a, a corresponding free projection, which leads to a bending of the gripper bar 10 to the drive wheel 16 around. When retracting the rapier rod 10 with the gripper system in the shed, as shown in Fig. 4b, this deflection changes so that it at rigid air ducts can lead to significant air gap changes. This is largely prevented by the invention.

Abstract

A weaving loom has a rapier (10) in rack and pinion tangential reversible contact with a drive wheel (16), and a two-part (22a, 22b) pneumatic guide (20) straddling the contact point. The guide units from an air cushion bearing with the rapier. The air cushion bearings are each located within a symmetrical spherical housing with a porous air inlet zone. The porosity is adjustable.

Description

Die Erfindung betrifft eine Webmaschine mit einer Greiferstange, welche mit einem Antriebsrad in Eingriff steht und von diesem reversierend antreibbar ist, und mit einer pneumatischen Führungseinrichtung zum Führen und Lagern der Greiferstange.The invention relates to a weaving machine with a rapier rod, which is in engagement with a drive wheel and is reversibly driven by this, and with a pneumatic guide means for guiding and supporting the gripper bar.

Eine Greiferstange in einer Webmaschine dient dem Eintrag des Schussfadens in das Kettfadensystem. Überlicherweise sind zwei Greiferstangen in der Webmaschine vorgesehen, welche beidseitig zu dem herzustellenden Gewebe angeordnet sind. Durch entsprechende Greifeinrichtungen an der Spitze der Greiferstangen erfolgt ein Übergeben des Schussfadens. Hierzu werden die Greiferstangen aufeinander abgestimmt reversierend in einer im Wesentlichen horizontalen Richtung verfahren. Je höher die Geschwindigkeit der Greiferstange, desto höher ist auch die Webleistung der Webmaschine.A rapier rod in a weaving machine is used to enter the weft thread in the warp thread system. Usually, two gripper bars are provided in the weaving machine, which are arranged on both sides of the fabric to be produced. By appropriate gripping means at the top of the gripper bars a transfer of the weft thread takes place. For this purpose, the gripper bars are coordinated with each other reversing in a substantially horizontal direction. The higher the speed of the gripper bar, the higher the weaving performance of the weaving machine.

Dem Führen und Lagern der Greiferstange kommt daher in einer Webmaschine eine maßgebliche Bedeutung zu. Die Führungseinrichtung muss einerseits für ein präzises Eintragen und Übergeben des Schussfadens eine exakte Führung gewährleisten und andererseits eine hohe Bewegungsgeschwindigkeit der Greiferstange erlauben. Herkömmliche Rollenlagerungen gewähren zwar eine exakte Führung. Jedoch bei höheren Bewegungsgeschwindigkeiten ergibt sich aufgrund der bestehenden Reibung eine erhebliche Wärmeentwicklung und Reibungsverschleiß, welche die Geschwindigkeit der Greiferstange begrenzen. Aus der DE-A-39 16 591 oder der DE-A-19 07 622 ist bekannt, pneumatische Führungseinrichtungen zur Führung der Greifersysteme zum Schussfadeneintrag vorzusehen. Eine gattungsgemäße Webmaschine mit einer pneumatischen Führungseinrichtung geht aus der EP O 866 156 B1 hervor, bei welcher ein Luftlager im Bereich der Eingriffsstelle des Antriebsrades diesem gegenüberliegend angeordnet ist.The guiding and storing of the gripper bar is therefore of decisive importance in a weaving machine. On the one hand, the guide device must ensure precise guidance for precise insertion and transfer of the weft thread and, on the other hand, permit a high speed of movement of the rapier rod. Although conventional roller bearings provide precise guidance. However, at higher speeds results due to the existing Friction considerable heat generation and frictional wear, which limit the speed of the gripper bar. From DE-A-39 16 591 or DE-A-19 07 622 is known to provide pneumatic guide means for guiding the gripper systems for weft insertion. A generic loom with a pneumatic guide device is apparent from EP O 866 156 B1, in which an air bearing in the region of the point of engagement of the drive wheel is arranged opposite this.

Im Gegensatz zu herkömmlichen Rollen- oder Gleitlagern haben pneumatische Lager den Nachteil, dass diese zum Erzeugen des notwendigen Luftspaltes beständig mit Druckluft versorgt werden müssen, was zu einem entsprechenden Energieverbrauch und erhöhten Betriebskosten führt.In contrast to conventional roller or plain bearings have pneumatic bearing the disadvantage that they must be constantly supplied to generate the necessary air gap with compressed air, resulting in a corresponding energy consumption and increased operating costs.

Der Erfindung liegt die Aufgabe zugrunde, eine Webmaschine anzugeben, bei welcher sowohl eine gute Führungseigenschaft für eine Greiferstange als auch ein geringer Energieverbrauch gegeben sind.The invention has for its object to provide a loom, in which both a good leadership property for a rapier and a low energy consumption are given.

Die Aufgabe wird nach der Erfindung durch eine Webmaschine mit den Merkmalen des Anspruchs 1 gelöst. Bevorzugte Ausführungsformen sind in den abhängigen Ansprüchen angegeben.The object is achieved according to the invention by a loom with the features of claim 1. Preferred embodiments are given in the dependent claims.

Die erfindungsgemäße Webmaschine ist dadurch gekennzeichnet, dass die pneumatische Führungseinrichtung mindestens zwei voneinander getrennt gelagerte Luftlager aufweist, welche beabstandet von der Eingriffsstelle des Antriebsrades angeordnet sind.The loom according to the invention is characterized in that the pneumatic guide means comprises at least two mutually separately mounted air bearings, which are spaced from the engagement point of the drive wheel.

Ein Grundgedanke der Erfindung basiert auf der Erkenntnis, dass die Greiferstange gerade bei höheren Bewegungsgeschwindigkeiten erheblichen dynamischen Belastungen ausgesetzt ist, welche einen Einfluss auf die pneumatische Führungseinrichtung haben. So beträgt die übliche Länge einer Greiferstange zwischen 1m bis 3m, wobei für Sonderwebmaschinen sogar noch größere Längen erzielt werden. Aufgrund dieser Länge sowie der sich bei der Reversierbewegung ergebenden Ausladung der Greiferstange mal zur einen und mal zu anderen Seite des Antriebsrades ergeben sich wechselnde Durchbiegungen der Greiferstange, welche sich insbesondere im Bereich des Antriebrades bemerkbar machen. Diese Durchbiegungen können bei einer pneumatischen Lagerung im Bereich der Eingriffsstelle, wie sie beispielsweise in der gattungsbildenden Druckschrift gelehrt wird, periodische Änderungen des Luftspaltes zwischen Greiferstange und dem Luftlager nach sich ziehen. Dies führt nicht nur zu einem erhöhten Druckluft- und damit Energieverbrauch, sondern kann auch die exakte Führung der Greiferstange beeinträchtigen.A basic idea of the invention is based on the recognition that the gripper bar is exposed to considerable dynamic loads, especially at higher speeds of movement, which have an influence on the pneumatic guide device. Thus, the usual length of a rapier bar between 1m to 3m, with special looms even greater lengths are achieved. Due to this length as well as resulting in the reversing movement of the gripper bar times to one side and sometimes to the other side of the drive wheel, there are changing deflections of the gripper bar, which are particularly noticeable in the drive wheel. These deflections can in a pneumatic bearing in the region of the point of engagement, as taught for example in the generic document, periodic changes in the air gap between rapier rod and the air bearing by itself. This not only leads to increased compressed air and thus energy consumption, but can also affect the exact guidance of the gripper bar.

Diese Problematik wird nach der Erfindung überwunden, indem mindestens zwei voneinander getrennte Luftlager beabstandet zur Eingriffsstelle des Antriebsrades angeordnet sind. Diese von einander getrennt gelagerten Luftlager können sich den Ausbiegungen und Schwingungen der Greiferstange besser anpassen und sogar dämpfend auf diese einwirken. Hierdurch wird der Gefahr von starken Schwankungen der Luftspaltbreite und damit einem übermäßigen Druckluft- und Energieverbrauch entgegengewirkt. Insgesamt wird in Kombination mit der Anzahl mehrerer Luftlager, die beabstandet voneinander sind, eine besonders hohe Führungsgenauigkeit der Greiferstange bei einem geringen Energieverbrauch erreicht.This problem is overcome according to the invention by at least two separate air bearings spaced from the engagement point of the drive wheel are arranged. These air bearings, which are mounted separately from each other, can better adapt to the deflections and vibrations of the gripper bar and even act on them in a damping manner. As a result, the risk of strong fluctuations in the air gap width and thus an excessive compressed air and energy consumption is counteracted. Overall, in combination with the number of multiple air bearings, which are spaced from each other, a particularly high guidance accuracy of the rapier bar is achieved with low energy consumption.

Eine besonders gute Anpassung der Luftlager an die Ausbiegungen der Greiferstange wird erfindungsgemäß dadurch erreicht, dass die Luftlager Gehäuse aufweisen, welche schwenkbar, insbesondere sphärisch gelagert sind. Bei einer einfachen schwenkbaren Lagerung sind die jeweiligen Gehäuse der Luftlager vorzugsweise um eine Achse auslenkbar, welche quer zur Längsachse der Greiferstange gerichtet ist. Eine sphärische Lagerung, bespielsweise mittels eines Kugelgelenkes, gegenüber dem Maschinengestell erlaubt zusätzlich die Kompensation von Verdrehungen des Schusseintragungsorganes.A particularly good adaptation of the air bearings to the bulges of the gripper bar is inventively achieved in that the air bearings have housing, which are pivotally mounted, in particular spherical. In a simple pivotal mounting, the respective housings of the air bearings are preferably deflectable about an axis which is directed transversely to the longitudinal axis of the gripper bar. A spherical bearing, recordable by means of a ball joint, relative to the machine frame additionally allows the compensation of torsions of the weft insertion member.

Ein Kompensation der Ausbiegungen der Greiferstange wird nach der Erfindung dadurch verbessert, dass die Luftlager an der Seite der Greiferstange angeordnet sind, welche von dem Antriebsrad abgewandt ist.A compensation of the bends of the gripper bar is improved according to the invention in that the air bearings are arranged on the side of the gripper bar, which faces away from the drive wheel.

Dabei ist es besonders bevorzugt, dass die Luftlager symmetrisch zur Eintrittsstelle angeordnet sind. Hierdurch kann der Abstand zwischen der Greiferstange und der Luftführung sehr klein eingestellt werden. Insgesamt kann bei dieser Anordnung der Ausbiegung der Greiferstange entgegengewirkt werden, wodurch sich die Führungsgenauigkeit verbessern und damit die Bewegungsgeschwindigkeit weiter erhöhen lässt.It is particularly preferred that the air bearings are arranged symmetrically to the point of entry. As a result, the distance between the gripper bar and the air duct can be set very small. Overall, in this arrangement, the deflection of the gripper bar can be counteracted, thereby improving the guidance accuracy and thus can further increase the speed of movement.

Eine weitere bevorzugte Ausführungsform der Erfindung besteht darin, dass die Luftlager an gegenüberliegenden Flanken der Greiferstange angeordnet sind. Hierbei können sich die Luftlager paarweise gegenüberliegen und entlang den sich etwa vertikal erstreckenden Flanken der Greiferstange angeordnet sein. Bei dieser Ausführungsform ist also nur eine seitliche Führung gegeben, während das Antriebsrad im Wesentlichen die Auflagerkräfte aufnehmen würde. Die seitlichen Luftlager können aber nicht nur alleine, sondern auch in Kombination zu der oben dargelegten Anordnung der Luftlager an der vom Antriebsrad abgewandten Seite der Greiferstange vorgesehen sein, was zu einer besonders exakten Führung beiträgt.A further preferred embodiment of the invention is that the air bearings are arranged on opposite flanks of the gripper bar. Here, the air bearings may be opposite to each other in pairs and arranged along the approximately vertically extending flanks of the gripper bar. In this embodiment, therefore, only a lateral guide is given, while the drive wheel would substantially absorb the bearing forces. The side air bearings can not only be alone, but also be provided in combination with the arrangement of the air bearing set forth above on the side facing away from the drive wheel side of the gripper bar, which contributes to a particularly accurate guidance.

Bei einer weiteren Ausgestaltung der Erfindung ist es vorteilhaft, dass das Luftlager eine Führungsfläche aufweist, welche mit einem porösen luftdurchlässigen Material versehen ist. An der Führungsfläche des Luftlagers sind also keine Lufttaschen oder Luftaustrittsdüsen mehr ausgebildet. Vielmehr ist ein im Wesentlichen über der gesamten Führungsfläche angeordnetes poröses luftdurchlässiges Element vorgesehen, welches über diese Fläche einen gleichmäßigen Luftdurchtritt zulässt. Ein solches Element kann beispielsweise eine luftdurchlässige Membran, ein poröser Kunststoff oder eine poröse Keramik sein, die vorzugsweise auch noch ausreichende Notlaufeigenschaften bei Unterbrechung der Druckluftversorgung sicherstellen.In a further embodiment of the invention, it is advantageous that the air bearing has a guide surface which is provided with a porous air-permeable material. On the guide surface of the air bearing so no air pockets or air outlet nozzles are formed. Instead, a porous air-permeable element arranged substantially over the entire guide surface is provided, which allows a uniform passage of air over this surface. Such an element may be, for example, an air-permeable membrane, a porous plastic or a porous ceramic, which preferably also ensure sufficient emergency running properties when the compressed air supply is interrupted.

Dabei besteht eine bevorzugte Weiterbildung darin, dass durch das poröse luftdurchlässige Material ein Luftverbrauch einstellbar ist, unabhängig von einer Spaltbreite zwischen Luftlager und Greiferstange. Bei einer entsprechenden Auswahl einer feinen Porosität spielt eine Änderung der Spaltbreite zwischen Greiferstange und Führungsfläche praktisch keine Rolle mehr. Somit kann auch bei starken Ausbiegungen der Greiferstange ein übermäßiger Luftverbrauch zuverlässig unterbunden werden. Im Weiteren zeichnet sich ein solches Luftlager auch dadurch aus, dass keine konstante Kraft auf die Greiferstange ausgeübt wird. Die Krafteinwirkung kommt vielmehr erst zustande, wenn die Greiferstange sich der Führung unter ein Mindestmaß, beispielsweise 0,1mm, nähert. Hierdurch wird sichergestellt, dass die angeordneten Führungen die Stangen nicht noch zusätzlich deformieren.In this case, a preferred development is that through the porous air-permeable material an air consumption is adjustable, regardless of a gap width between air bearing and gripper bar. With a corresponding selection of a fine porosity, a change in the gap width between gripper bar and guide surface plays virtually no role. Thus, even with strong bends of the rapier bar excessive air consumption can be reliably prevented. Furthermore, such an air bearing is also distinguished by the fact that no constant force is exerted on the gripper bar. Rather, the force effect only comes about when the rapier rod approaches the guide below a minimum, for example 0.1 mm. This ensures that the arranged guides do not deform the rods additionally.

Weiter ist es erfindungsgemäß, dass eine Druckluftquelle vorgesehen ist, welche zum Liefern einer konstanten Luftmenge bei einem vorgegebenen Druck mit den Luftlagern verbunden ist. Aufgrund der speziellen Ausgestaltung der Luftlager kann grundsätzlich sogar auf eine aufwändige Regelung der Druckluftzufuhr verzichtet werden, ohne dass es zu einem unwirtschaftlich hohen Druckluftverbrauch kommt.It is also according to the invention that a compressed air source is provided, which is connected to the air bearings for supplying a constant amount of air at a predetermined pressure. Due to the special design of the air bearings can in principle even be dispensed with a complex control of compressed air supply, without resulting in an uneconomical high compressed air consumption.

Zur Erreichung besonders hoher Reversiergeschwindigkeiten bei einer gleichzeitig hohen Stabilität der Greiferstangen ist es erfindungsgemäß, dass die Greiferstange aus einem Karbonwerkstoff gebildet ist. Ein Karbonwerkstoff ist bei einer hohen Festigkeit und Stabilität besonders leicht, was zu einer geringen Massenträgheit der Greiferstange beiträgt.In order to achieve particularly high reversing speeds with a simultaneously high stability of the gripper bars, it is inventively that the gripper bar is formed of a carbon material. A carbon material is particularly light with a high strength and stability, which contributes to a low inertia of the gripper bar.

Betreffend die pneumatische Führungseinrichtung ist vorgesehen, dass an der Führungsfläche ein poröses luftdurchlässiges Material angeordnet ist. Neben dem zuvor beschriebenen Einsatz in einer Webmaschine, kann eine solche pneumatische Führungseinrichtung auch zu anderen Zwecken eingesetzt werden.With regard to the pneumatic guide device, provision is made for a porous, air-permeable material to be arranged on the guide surface. In addition to the use described above in a weaving machine, such a pneumatic guide device can also be used for other purposes.

Die Erfindung wird nachfolgend anhand von bevorzugten Ausführungsbeispielen weiter erläutert, welche in den Zeichnungen schematisch dargestellt sind. In den Zeichnungen zeigen:

Fig. 1
eine schematische Seitenansicht auf eine Greiferstange mit Antriebsrad und einer erfindungsgemäßen Führungsanordnung;
Fig. 2
eine vergrößerte Querschnittsansicht durch ein Luftlager nach der Erfindung;
Fig. 3
eine schematische Draufsicht auf eine weitere Führungsanordnung gemäß der Erfindung;
Fig. 4a und 4b
schematische Seitenansichten zur Ausbiegung der Greiferstange in einer Webmaschine.
The invention will be further explained with reference to preferred embodiments, which are shown schematically in the drawings. In the drawings show:
Fig. 1
a schematic side view of a rapier rod with drive wheel and a guide assembly according to the invention;
Fig. 2
an enlarged cross-sectional view through an air bearing according to the invention;
Fig. 3
a schematic plan view of another guide assembly according to the invention;
Fig. 4a and 4b
schematic side views to the deflection of the rapier bar in a loom.

Bei dem Ausführungsbeispiel gemäß Fig. 1 ist eine längliche Greiferstange 10 vorgesehen, welche, wie in Fig. 2.gezeigt ist, im Querschnitt rechteckig und mit einer Verzahnung 11 an ihrer Unterseite ausgebildet ist. Diese lineare Verzahnung 11 steht in kämmender Verbindung mit der Außenverzahnung eines Antriebsrades 16, welches von einem nicht dargestellten Motor angetrieben ist. Entsprechend der Rotation des Antriebsrades 16 kann die Greiferstange 10 reversierend zu beiden Seiten bewegt werden, wobei in Fig. 1 eine etwa mittlere Position der Greiferstange 10 gezeigt ist.In the embodiment according to FIG. 1, an elongated rapier rod 10 is provided which, as shown in FIG. 2, is rectangular in cross section and formed with a toothing 11 on its underside. This linear toothing 11 is in meshing connection with the external toothing of a drive wheel 16, which is driven by a motor, not shown. According to the rotation of the drive wheel 16, the gripper bar 10 can be reversibly moved to both sides, wherein in Fig. 1, an approximately central position of the gripper bar 10 is shown.

An einem freien Ende der Greiferstange 10 ist ein nicht dargestelltes, hinlänglich bekanntes Greifsystem zum Greifen und Eintragen eines Schussfadens angeordnet. Beabstandet von der Eingriffstelle zwischen dem Antriebsrad 16 und der Verzahnung 11 der Greiferstange 10 sind zu beiden Seiten dieser Eingriffstelle Luftlager 22a, 22b angeordnet, welche zusammen eine Führungseinrichtung 20 zum Führen und Lagern der Greiferstange 10 bilden. Aufbau und Funktion der zwei gleichen Luftlager 22a und 22b werden nachfolgend im Zusammenhang mit Fig. 2 näher erläutert.At a free end of the rapier bar 10 is a non-illustrated, well-known gripping system for gripping and entering a weft thread is arranged. Spaced from the point of engagement between the drive wheel 16 and the toothing 11 of the rapier rod 10, air bearings 22a, 22b are arranged on both sides of this engagement point, which together form a guide device 20 for guiding and supporting the rapier rod 10. Structure and function of the two same air bearings 22a and 22b are explained in more detail below in connection with FIG.

Das Luftlager 22 weist ein Gehäuse 24 auf, welches einstellbar an einem Maschinenrahmen 5 gelagert ist. In den Maschinenrahmen ist ein Schraubbolzen 7 eingeschraubt, welcher das Gehäuse 24 durchdringt. Am Schaft des Schraubbolzens 7 ist eine Kugelhülse 25 angeordnet, welche mittels einer Distanzhülse 9 zwischen dem Kopf des Schraubbolzens 7 und dem Grundrahmen 5 verspannt ist. Die Kugelhülse 9 bildet mit einem korrespondierend dazu ausgeformten Lagerring 26, welcher in einer Aufnahmebohrung im Gehäuse 24 befestigt ist, ein sphärisches Lager. Weiterhin sind Justierschrauben 3 im Maschinenrahmen 5 vorgesehen, mit welchem eine Seitenneigung des Gehäuses 24 eingestellt werden kann.The air bearing 22 has a housing 24 which is adjustably mounted on a machine frame 5. In the machine frame, a screw bolt 7 is screwed, which penetrates the housing 24. On the shaft of the bolt 7, a ball sleeve 25 is arranged, which is braced by means of a spacer sleeve 9 between the head of the bolt 7 and the base frame 5. The ball sleeve 9 forms with a correspondingly shaped bearing ring 26 which is fixed in a receiving bore in the housing 24, a spherical bearing. Furthermore, adjusting screws 3 are provided in the machine frame 5, with which a lateral inclination of the housing 24 can be adjusted.

Innerhalb des Gehäuses 24 verläuft ein von einer Druckluftquelle gespeister Druckluftkanal 27, welcher in eine Austrittsöffnung 28 mündet. Diese erstreckt sich nahezu entlang der gesamten Unterseite des Gehäuses 24. Die Austrittsöffnung 28 ist von einem nicht näher dargestellten porösen luftdurchlässigen Material abgedeckt, welches eine ebene Führungsfläche 30 bildet, welche parallel zur Oberseite der Greiferstange 10 unter Bildung einer Luftspalte oder Luftkissens verläuft.Within the housing 24 there is a compressed air channel 27, which is fed by a compressed air source and opens into an outlet opening 28. This extends almost along the entire underside of the housing 24. The outlet opening 28 is covered by a porous air-permeable material, not shown, which forms a flat guide surface 30 which extends parallel to the top of the rapier bar 10 to form an air gap or air cushion.

Fig. 3 zeigt eine alternative Ausführungsform, bei welcher die Luftlager 22a, 22b an den seitlichen Flanken 14 der Greiferstange 10 angeordnet sind. Bei dieser Anordnung dient das Antriebsrad 16 auch als eine Art Auflager, um die Gewichtskraft der Greiferstange 10 aufzunehmen.FIG. 3 shows an alternative embodiment in which the air bearings 22a, 22b are arranged on the lateral flanks 14 of the rapier bar 10. In this arrangement, the drive wheel 16 also serves as a kind of support to accommodate the weight of the gripper bar 10.

In den Fig. 4a und 4b wird nochmals die Problematik der Ausbiegung der Greiferstange 10 im Betriebsverlauf anschaulich dargestellt. Aufgrund der erheblichen Länge der Greiferstange 10 ergibt sich in der Betriebsposition gemäß Fig. 4a eine entsprechende freie Ausladung, welche zu einer Biegung der Greiferstange 10 um das Antriebsrad 16 herum führt. Beim Einfahren der Greiferstange 10 mit dem Greifersystem in das Webfach, wie es in Fig. 4b dargestellt ist, ändert sich diese Ausbiegung, so dass es bei starren Luftführungen zu erheblichen Luftspaltänderungen kommen kann. Dies wird durch die Erfindung weitgehend verhindert. In FIGS. 4 a and 4 b, the problem of the deflection of the rapier bar 10 in the course of operation is once again graphically illustrated. Due to the considerable length of the gripper bar 10 results in the operating position shown in FIG. 4a, a corresponding free projection, which leads to a bending of the gripper bar 10 to the drive wheel 16 around. When retracting the rapier rod 10 with the gripper system in the shed, as shown in Fig. 4b, this deflection changes so that it at rigid air ducts can lead to significant air gap changes. This is largely prevented by the invention.

Claims (9)

  1. Weaving machine comprising a gripper bar (10), which is in engagement with a drive wheel (16) and drivable by the latter in a reversing manner, and a pneumatic guiding device (20) for guiding and supporting the gripper bar (10),
    characterized in that
    the pneumatic guiding device (20) includes at least two air bearings (22a, 22b) supported separately from each other, which are arranged in a spaced manner from the point of engagement of the drive wheel (16).
  2. Weaving machine according to claim 1,
    characterized in that
    the air bearings (22a, 22b) include housings (24) that are supported in a pivotable manner, in particular spherically.
  3. Weaving machine according to claim 1 or 2,
    characterized in that
    the air bearings (22a, 22b) are arranged on the side of the gripper bar (10) which faces away from the drive wheel (16).
  4. Weaving machine according to any one of claims 1 to 3,
    characterized in that
    the air bearings (22a, 22b) are arranged symmetrically to the point of engagement.
  5. Weaving machine according to any one of claims 1 to 4,
    characterized in that
    the air bearings (22a, 22b) are arranged on opposite flanks (14) of the gripper bar (10).
  6. Weaving machine according to any one of claims 1 to 5,
    characterized in that
    the air bearing (22a, 22b) has a guide surface (30) that is provided with a porous air-permeable material.
  7. Weaving machine according to claim 6,
    characterized in that
    by means of the porous air-permeable material an air consumption can be adjusted independently of a gap width between air bearing (22a, 22b) and gripper bar (10).
  8. Weaving machine according to any one of claims 1 to 7,
    characterized in that
    a compressed-air source is provided which is connected to the air bearings (22a, 22b) for supplying a constant quantity of air at a predetermined pressure.
  9. Weaving machine according to any one of claims 1 to 8,
    characterized in that
    the gripper bar (10) is formed of a carbon material.
EP03028269A 2003-12-09 2003-12-09 Weaving loom Expired - Lifetime EP1541730B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP03028269A EP1541730B1 (en) 2003-12-09 2003-12-09 Weaving loom
AT03028269T ATE321161T1 (en) 2003-12-09 2003-12-09 WEAVING MACHINE
DE50302727T DE50302727D1 (en) 2003-12-09 2003-12-09 loom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03028269A EP1541730B1 (en) 2003-12-09 2003-12-09 Weaving loom

Publications (2)

Publication Number Publication Date
EP1541730A1 EP1541730A1 (en) 2005-06-15
EP1541730B1 true EP1541730B1 (en) 2006-03-22

Family

ID=34486155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03028269A Expired - Lifetime EP1541730B1 (en) 2003-12-09 2003-12-09 Weaving loom

Country Status (3)

Country Link
EP (1) EP1541730B1 (en)
AT (1) ATE321161T1 (en)
DE (1) DE50302727D1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1535491A1 (en) * 1964-10-03 1969-11-20 Dornier Gmbh Lindauer Shotless weaving machine with weft thread insertion through a gripper system
JPH01502762A (en) * 1987-04-03 1989-09-21 テクスティルマ・アクチエンゲゼルシャフト gripper loom
IT1218006B (en) * 1988-05-27 1990-03-30 Nuovo Pignone Spa PERFECTED DRIVE SYSTEM FOR FLEXIBLE TAPES CLAMP HOLDERS IN TEXTILE FRAMES WITHOUT SHUTTLE
DE19711594A1 (en) * 1997-03-20 1998-09-24 Dornier Gmbh Lindauer Device for guiding and storing a gripper support member in weaving machines
BE1014950A3 (en) * 2001-08-29 2004-07-06 Wiele Michel Van De Nv Apparatus for driving and guiding a gripper of a weaving machine.

Also Published As

Publication number Publication date
ATE321161T1 (en) 2006-04-15
DE50302727D1 (en) 2006-05-11
EP1541730A1 (en) 2005-06-15

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