EP0937798A1 - Cutting device for looms - Google Patents

Cutting device for looms Download PDF

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Publication number
EP0937798A1
EP0937798A1 EP99101919A EP99101919A EP0937798A1 EP 0937798 A1 EP0937798 A1 EP 0937798A1 EP 99101919 A EP99101919 A EP 99101919A EP 99101919 A EP99101919 A EP 99101919A EP 0937798 A1 EP0937798 A1 EP 0937798A1
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EP
European Patent Office
Prior art keywords
cutting device
fabric
cutting
blade
edge
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Granted
Application number
EP99101919A
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German (de)
French (fr)
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EP0937798B1 (en
Inventor
Josef Hehle
Hubertus Ludwig
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Lindauer Dornier GmbH
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Lindauer Dornier GmbH
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Publication of EP0937798A1 publication Critical patent/EP0937798A1/en
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Publication of EP0937798B1 publication Critical patent/EP0937798B1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/06—Auxiliary apparatus combined with or associated with looms for treating fabric
    • D03J1/08—Auxiliary apparatus combined with or associated with looms for treating fabric for slitting fabric
    • 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
    • D03D49/70—Devices for cutting weft threads

Definitions

  • the invention relates to a cutting device in weaving machines, in particular for Cutting free the edge of a fabric from a catch strip, according to the characteristics of the Preamble of claim 1.
  • an edge cutting device for a weaving machine for separating the edge strip (catch strip) from the base fabric before it is wound up, consisting of a driven cutting tool designed as scissors in the cutting alley at the edge of the fabric and in a vertical position to the fabric web Level is arranged.
  • the scissors are held reliably in the cutting alley and do not run into the fabric web, it is provided that the scissors are suspended at one end for a pendulum bearing for lateral movement in the weft direction and at their other end, which dips into the cutting alley, in the area of the cutting edges Equipped with parallel guide surfaces for self-guidance in the cutting lane, which are in contact with the fabric edge on the one hand and with the edge of the safety edge on the other hand.
  • the cutting device although it is accommodated in a roller bearing in an oscillating manner, cannot track the fabric edge. In the case of fabric jumps, for example, weft thread ends of different lengths will be present on the fabric edge because the cutting device cannot track the fabric edge directly.
  • DE 20 42 207 B2 discloses a device for trimming the marginal edges of fabric webs, with a shaving head which is fixed relative to the longitudinal movement of the fabric web. So that the shaving head can react quickly to a changing edge condition of the fabric web, the shaving head has a drivable transverse shifting device, by means of which the shaving head can be advanced transversely to the fabric edge depending on a device scanning the fabric edge. Such a shaving head control is expensive.
  • a cutting device in weaving machines which has a carrying device which is mounted displaceably in the direction of the weft threads and is connected to a guide device.
  • the guide device rests on the one hand at least on one side against the tissue edge and on the other hand it is mounted such that it can be moved back and forth transversely to the tissue plane.
  • the aforementioned DE-PS does not disclose how and what ensures that the guiding device is actually tracked on the fabric edge, that is to say inevitably the fabric edge.
  • a cutting device in weaving machines is also known from FR-PS 2 271 320.
  • the cutting blade carrier of this cutting device has guide elements in the area of the cutting blades, which are in contact after the intersection of the cutting blades on the one hand with the fabric edge and on the other hand with the safety edge. This cutting device also does not ensure that the cutting edge corresponds to the course of the fabric edge, because the guide element on the fabric edge does not necessarily track the fabric edge.
  • FR-PS 2 426 106 a cutting device in weaving machines is known which has no guide elements in the area of the cutting blades and consequently the Fabric edge can not be tracked.
  • the cutting process is preceded by an alignment and guiding of the cutting device on a cutting area lying between the fabric edge and the catching strip in order to cut free the tissue edge from a catch strip which is formed parallel to a fabric strip to be produced.
  • Alignment and guiding is carried out by means of a track wheel arranged on the cutting device, which leads the cutting process and which predetermines the cutting line of the cutting means lying between the fabric edge and the catch strip.
  • the cutting device can be pivoted in the cutting plane about a fulcrum spaced from the center axis of the blade bolt.
  • the trace wheel ensures that the cutting device is guided almost parallel to the fabric edge.
  • the length of the ends of the weft threads projecting beyond the fabric edge can, however, be of different lengths in connection with a fabric insertion.
  • fabrics which, owing to the species of the fabric material, have a relatively large jump-in behavior it is not possible to track the cutting device in the direction of the fabric edge due to the design of the cutting device.
  • weft ends that protrude beyond the fabric edge are therefore relatively long and can also be of different lengths.
  • the protrusion behavior of the fabric and thus the position of the fabric edge also change. This means that one and the same fabric edge has weft ends of different lengths.
  • the weft thread ends of different lengths lead to a product edge that does not meet the quality requirements in the subsequent assembly process by folding over the fabric edge and sewing it to the fabric.
  • the cutting device is spring-loaded in addition to its limited pivotability, approximately in the plane in which the fabric web is supported by a fabric spreader. The purpose of this is to ensure that the trace wheel engaging in the weft threads has a certain amount of guiding play both in the direction of the fabric edge and in the direction of the edge of the catch strip.
  • neither the embodiment of the cutting device according to DE 24 35 397 A1 nor the improved embodiment overcomes the aforementioned disadvantage that the cut edge does not correspond to the course of the fabric edge.
  • the object of the invention is independent of the jump-in behavior of those to be produced Realize a cut edge that corresponds to the course of the fabric edge.
  • the object is achieved by the features of patent claim 1.
  • the invention consists in that on a fixed part one per se known cutting device for cutting free the tissue edge of a to be produced Fabric web a guide element is arranged with the cut-away fabric edge resiliently in contact and thus also the cutting device of the fabric edge is tracked in the case of tissue jumps.
  • a fabric web 8 produced on a weaving machine is closed in succession via a fabric spreader 16, consisting of the combination of a fabric support 16a with a needle spreader 16b, via a first shaft 20 and subsequently via a second shaft 21 in the direction of arrow 22 a goods tree, not shown, wound up on this.
  • a firm fabric edge 8a is produced at the edges of the fabric web 8 and a so-called catch bar 15 is produced at least on the output side of the shed, in which the end of each weft thread 15a is firmly tied, see also FIG. 2.
  • the fabric web 8 and the catching strip 15 are connected to one another by the weft threads 15a until a cutting device 1 carried by a machine-fixed support 17 passes.
  • the tissue edge 8a of the tissue 8 is cut free from the catch strip 15 to a predetermined length in a first working step.
  • a guide element 9, which is connected to the cutting device 1 which is spring-loaded in the direction of the fabric edge 8a and is adjustable relative to the fabric web 8 comes into contact with the tissue edge 8a, as a result of which the cutting means 3, 5 of the cutting device 1 and the cutting device 1 itself Fabric edge 8a is trackable. It is irrelevant for tracking whether fabrics with a low or high weft density are produced.
  • the cutting device is designed for tracking, as described below.
  • the cutting device 1 is arranged on a machine-fixed support 17, best seen in FIG. 5, about the central axis 7a of the axis of rotation 7 connected to the support 17, between a first and a second end limitation 11, 12, see also FIG. 2.
  • the cutting device 1 consists of the swivel body 18 which is rotatably mounted about the aforementioned central axis 7a of the axis of rotation 7.
  • the gravity body 18 carries the drive 4 at a distance from the axis of rotation 7, which is an electromotive drive in the exemplary embodiment.
  • the fixed cutting blade 3 and the cutting blade carrier 2 are also connected to the swivel body 18 by means of the screws 19.
  • the cutting blade carrier 2 which lies parallel to the movable cutting blade 5, carries the blade bolt 6, about the center axis 6a of which the cutting blade 5 is movable. Spaced from the center axis 6a of the blade bolt 6, the cutting blade 5 is connected to a driver 4c eccentrically to the center axis 4b of the shaft 4a of the drive 4.
  • a guide element 9 which is in contact with the edge 8a of the fabric 8 is arranged on a fixed part of the cutting device 1, see also FIG. 2.
  • the guide part 9 consists of an end approximately U-shaped profile 9a supporting pin 9b.
  • the pin 9b is adjustably received in the guide 10c of a holding means 10 and can be locked by means of a clamping screw 10b.
  • the retaining means 10 is designed in the manner of a screw in continuation of its longitudinal center axis 10a. The screw part is fastened to the cutting blade carrier 2 by means of the nuts 10d and 10e.
  • the heavy body 18 carrying the blade support 2, the cutting blade 3, the cutting blade 5 and the drive 4 is pivotably received about the central axis 7a of the axis of rotation 7.
  • the axis of rotation 7 extends vertically through the carrier 17 in the region of the free end such that the ends of the axis of rotation 7 form the pivot bearing for the cutting device 1 as a whole.
  • a spring element 14 is integrated between the carrier 17 and the swivel body 18, which permanently generates a torque about the center axis 7a on the swivel body 18 and thus on the entire cutting device 1.
  • the torque ensures that the guide element 9 tracks the cutting device 1 of the cut-away tissue edge 8.
  • the spring element 14 is preferably a compression spring which is held in a receptacle 18a of the swivel body 18 and engages the support 17 flatly at 13 and whose force can be adjusted by means of a threaded pin 14a which can be screwed into the swivel body 18 and locked by a nut 14b is.

Abstract

The cutting mechanism at a loom has a swing body (18) with a fitted cutting blade carrier (2). The electromotor (4) for the drive operates the moving cutting blade (5), in a swing movement round the center axis (6a) of the blade bolt (6). The cutting unit also has a fixed blade (3). A rotary axis (7), fixed to the machine, is at a gap from the blade bolt (6) for the sprung cutting unit (1) to swing round its center axis (7a) on the plane of the woven fabric (8) supported at the spreader (16). A sprung guide for the cutter (1) is held in contact with the selvage of the woven fabric (8), held at a fixed part (2,3) of the cutter (1) and at a gap from the blade bolt (6). The fixed part of the cutter is the blade carrier (2) or the fixed cutting blade (3). The sprung guide has a U-shaped profile (9a) and a pin (9b) carried at an end side of the profile. The cutter (1) swings round the center axis (7a) of the rotary axis (7) between limits at the fabric side and the catch side. The limit at the fabric side is at a gap from the cutter (1) which equals the maximum fabric contraction after the spreader (16). A spring is at the grip surface away from the rotary axis (7), to act on the cutter (1) and the guide. The spring force on the cutter is adjustable. The pin (9b) is held (10) at the blade carrier (2). The center axis (10a) of the pin holder (10) is set at the blade carrier (2) so that the guide is in contact with the selvage after the cutting point of the blades (3,5). The position of the guide can be set in relation to the fabric selvage.

Description

Die Erfindung betrifft eine Schneideinrichtung in Webmaschinen, insbesondere zum Freischneiden der Kante eines Gewebes von einer Fangleiste, nach den Merkmalen des Oberbegriffs von Patentanspruch 1.The invention relates to a cutting device in weaving machines, in particular for Cutting free the edge of a fabric from a catch strip, according to the characteristics of the Preamble of claim 1.

Bekannt ist aus der DE 32 19 457 C2 eine Kantenschneidvorrichtung für eine Webmaschine zum Abtrennen der Randleiste (Fangleiste) vom Grundgewebe vor dessen Aufwicklung, bestehend aus einem in der Schneidgasse am Geweberand geführten, als Schere ausgebildeten, angetriebenen Schneidwerkzeug, das in einer zur Gewebebahn vertikalen Ebene angeordnet ist.
Damit die Schere zuverlässig in der Schneidgasse gehalten wird und nicht in die Gewebebahn läuft, ist vorgesehen, die Schere mit ihrem einen Ende für eine seitliche Bewegung in Schussrichtung an einem Pendellager pendelnd aufzuhängen und an ihrem anderen, in die Schneidgasse eintauchenden Ende im Bereich der Schnittkanten mit parallel verlaufenden, zur Selbstführung in der Schneidgasse bestimmten Führungsflächen auszurüsten, die einerseits mit der Gewebekante und andererseits mit der Fangleistenkante in Berührungskontakt stehen.
Die Schneidvorrichtung kann nicht, obgleich diese pendelnd in einem Rollenlager aufgenommen ist, der Gewebekante nachgeführt werden. Bei Gewebeeinsprüngen z.B. werden unterschiedlich lange Schussfadenenden an der Gewebekante vorhanden sein, weil die Schneidvorrichtung der Gewebekante nicht direkt nachgeführt werden kann.Known from DE 32 19 457 C2 is an edge cutting device for a weaving machine for separating the edge strip (catch strip) from the base fabric before it is wound up, consisting of a driven cutting tool designed as scissors in the cutting alley at the edge of the fabric and in a vertical position to the fabric web Level is arranged.
So that the scissors are held reliably in the cutting alley and do not run into the fabric web, it is provided that the scissors are suspended at one end for a pendulum bearing for lateral movement in the weft direction and at their other end, which dips into the cutting alley, in the area of the cutting edges Equipped with parallel guide surfaces for self-guidance in the cutting lane, which are in contact with the fabric edge on the one hand and with the edge of the safety edge on the other hand.
The cutting device, although it is accommodated in a roller bearing in an oscillating manner, cannot track the fabric edge. In the case of fabric jumps, for example, weft thread ends of different lengths will be present on the fabric edge because the cutting device cannot track the fabric edge directly.

Aus der DE 20 42 207 B2 ist eine Vorrichtung zum Beschneiden der Randkanten von Gewebebahnen bekannt, mit einem relativ zur Längsbewegung der Gewebebahn feststehenden Scherkopf.
Damit der Scherkopf schnell auf eine wechselnde Randbeschaffenheit der Gewebebahn reagieren kann, besitzt der Scherkopf eine antreibbare Querverschiebeeinrichtung, mittels der in Abhängigkeit von einer die Gewebekante abtastenden Einrichtung der Scherkopf quer zum Geweberand zustellbar ist.
Eine solche Scherkopf-Steuerung ist kostenaufwendig. DE 20 42 207 B2 discloses a device for trimming the marginal edges of fabric webs, with a shaving head which is fixed relative to the longitudinal movement of the fabric web.
So that the shaving head can react quickly to a changing edge condition of the fabric web, the shaving head has a drivable transverse shifting device, by means of which the shaving head can be advanced transversely to the fabric edge depending on a device scanning the fabric edge.
Such a shaving head control is expensive.

Aus der DE-PS 870 230 ist eine Schneideinrichtung in Webmaschinen bekannt, die eine Tragvorrichtung besitzt, welche in Richtung der Schussfäden verschiebbar gelagert und mit einer Führungsvorrichtung verbunden ist.
Die Führungsvorrichtung liegt einerseits mindestens einseitig an der Gewebekante an und sie ist andererseits quer zur Gewebeebene hin und her bewegbar gelagert. Die vorgenannte DE-PS offenbart nicht, wie und wodurch gewährleistet wird, dass die Führungsvorrichtung tatsächlich an der Gewebekante, also zwangsläufig der Gewebekante nachgeführt wird.From DE-PS 870 230 a cutting device in weaving machines is known which has a carrying device which is mounted displaceably in the direction of the weft threads and is connected to a guide device.
The guide device rests on the one hand at least on one side against the tissue edge and on the other hand it is mounted such that it can be moved back and forth transversely to the tissue plane. The aforementioned DE-PS does not disclose how and what ensures that the guiding device is actually tracked on the fabric edge, that is to say inevitably the fabric edge.

Bekannt ist des weiteren aus der FR-PS 2 271 320 eine Schneideinrichtung in Webmaschinen.
Der Schneidklingenträger dieser Schneideinrichtung besitzt im Bereich der Schneidklingen Führungselemente, die nach dem Schnittpunkt der Schneidklingen einerseits mit der Gewebekante und andererseits mit der Fangleistenkante in Berührungskontakt stehen.
Auch diese Schneideinrichtung gewährleistet nicht, dass die Schnittkante dem Verlauf der Gewebekante entspricht, weil das gewebekantenseitige Führungselement nicht zwangsweise der Gewebekante nachgeführt wird.A cutting device in weaving machines is also known from FR-PS 2 271 320.
The cutting blade carrier of this cutting device has guide elements in the area of the cutting blades, which are in contact after the intersection of the cutting blades on the one hand with the fabric edge and on the other hand with the safety edge.
This cutting device also does not ensure that the cutting edge corresponds to the course of the fabric edge, because the guide element on the fabric edge does not necessarily track the fabric edge.

Ferner ist aus der FR-PS 2 426 106 eine Schneideinrichtung in Webmaschinen bekannt, die keine Führungselemente im Bereich der Schneidklingen besitzt und folglich der Gewebekante nicht nachgeführt werden kann.Furthermore, from FR-PS 2 426 106 a cutting device in weaving machines is known which has no guide elements in the area of the cutting blades and consequently the Fabric edge can not be tracked.

Aus der DE 24 35 397 A1 ist des weiteren eine Schneideinrichtung bekannt, die folgende Merkmale umfasst:

  • einen Schwenkkörper,
  • einen mit dem Schwenkkörper verbundenen Schneidklingenträger,
  • eine mit einem Antrieb in Verbindung stehende bewegliche Schneidklinge, die um die Mittenachse des Klingenbolzens der Schneideinrichtung schwenkbar angeordnet ist,
  • eine feststehende Schneidklinge und
  • eine beabstandet von dem Klingenbolzen angeordnete maschinenfeste Drehachse, um deren Mittenachse die Schneideinrichtung etwa in der Ebene der durch einen Gewebebreithalter unterstützten Gewebebahn schwenkbar ist.
A cutting device is also known from DE 24 35 397 A1, which comprises the following features:
  • a swivel body,
  • a cutting blade carrier connected to the swivel body,
  • a movable cutting blade connected to a drive, which is arranged pivotably about the central axis of the blade bolt of the cutting device,
  • a fixed cutting blade and
  • a machine-fixed axis of rotation arranged at a distance from the blade bolt, about the center axis of which the cutting device can be pivoted approximately in the plane of the fabric web supported by a fabric spreader.

Dem Schneidvorgang geht, um die Gewebekante von einer Fangleiste, die parallel zu einer herzustellenden Gewebebahn gebildet wird, freizuschneiden, ein Ausrichten und Führen der Schneideinrichtung auf einen zwischen der Gewebekante und der Fangleiste liegenden Schnittbereich voraus.
Das Ausrichten und Führen erfolgt mittels eines an der Schneideinrichtung angeordneten Spurenades, das dem Schneidvorgang vorauseilt und dass die zwischen der Gewebekante und der Fangleiste liegende Schnittlinie der Schneidmittel vorbestimmt.
Die Schneideinrichtung ist in der Schneidebene um einen beabstandet von der Mittenachse des Klingenbolzens gelegenen Drehpunkt schwenkbar. Das Spurenrad sorgt dafür, dass die Schneideinrichtung nahezu parallel zur Gewebekante geführt wird.
Die Länge der über die Gewebekante hinaus stehenden Enden der Schussfäden kann jedoch im Zusammenhang mit einem Gewebeeinsprung unterschiedlich lang sein.
Bei Geweben, die aufgrund der Spezies des Gewebematerials ein relativ großes Einsprungverhalten besitzen, ist wegen der konstruktiven Gegebenheiten der Schneideinrichtung ein Nachführen der Schneideinrichtung in Richtung Gewebekante nicht möglich.
Bei eingesprungener Gewebekante entstehen daher relativ lange, über die Gewebekante hinausragende Schussfadenenden, die zudem unterschiedlich lang sein können.
In Geweben, in denen sich Gewebeabschnitte mit hoher Schussdichte und Gewebeabschnitte mit vergleichsweise geringer Schussdichte abwechseln, ändert sich auch das Einsprungsverhalten des Gewebes und damit die Lage der Gewebekante. Dies führt dazu, dass ein und dieselbe Gewebekante unterschiedlich lange Schussfadenenden besitzt. Die unterschiedlich langen Schussfadenenden führen im nachfolgenden Konfektionsprozess durch Umlegen der Gewebekante und deren Vernähen mit dem Gewebe zu einer nicht qualitätsgerechten Produktkante.The cutting process is preceded by an alignment and guiding of the cutting device on a cutting area lying between the fabric edge and the catching strip in order to cut free the tissue edge from a catch strip which is formed parallel to a fabric strip to be produced.
Alignment and guiding is carried out by means of a track wheel arranged on the cutting device, which leads the cutting process and which predetermines the cutting line of the cutting means lying between the fabric edge and the catch strip.
The cutting device can be pivoted in the cutting plane about a fulcrum spaced from the center axis of the blade bolt. The trace wheel ensures that the cutting device is guided almost parallel to the fabric edge.
The length of the ends of the weft threads projecting beyond the fabric edge can, however, be of different lengths in connection with a fabric insertion.
In the case of fabrics which, owing to the species of the fabric material, have a relatively large jump-in behavior, it is not possible to track the cutting device in the direction of the fabric edge due to the design of the cutting device.
When the fabric edge is cracked, weft ends that protrude beyond the fabric edge are therefore relatively long and can also be of different lengths.
In fabrics in which fabric sections with high weft density and fabric sections with comparatively low weft density alternate, the protrusion behavior of the fabric and thus the position of the fabric edge also change. This means that one and the same fabric edge has weft ends of different lengths. The weft thread ends of different lengths lead to a product edge that does not meet the quality requirements in the subsequent assembly process by folding over the fabric edge and sewing it to the fabric.

In einer vergegenständlichten und verbesserten Ausführungsform einer Schneideinrichtung gemäß der DE 24 35 397 A1 ist die Schneideinrichtung etwa in der Ebene, in der die Gewebebahn durch einen Gewebebreithalter unterstützt wird, neben ihrer begrenzten Schwenkbarkeit zugleich federbelastet. Damit soll bewirkt werden, dass das in die Schussfäden eingreifende Spurenrad sowohl in Richtung der Gewebekante als auch in Richtung der Fangleistenkante ein gewisses Führungsspiel besitzt.
Den vorgenannten Nachteil, wonach die Schnittkante nicht dem Verlauf der Gewebekante entspricht, hebt jedoch weder die Ausführungsform der Schneideinrichtung nach der DE 24 35 397 A1 noch die verbesserte Ausführungsform auf.In an objectified and improved embodiment of a cutting device according to DE 24 35 397 A1, the cutting device is spring-loaded in addition to its limited pivotability, approximately in the plane in which the fabric web is supported by a fabric spreader. The purpose of this is to ensure that the trace wheel engaging in the weft threads has a certain amount of guiding play both in the direction of the fabric edge and in the direction of the edge of the catch strip.
However, neither the embodiment of the cutting device according to DE 24 35 397 A1 nor the improved embodiment overcomes the aforementioned disadvantage that the cut edge does not correspond to the course of the fabric edge.

Aufgabe der Erfindung ist es, unabhängig vom Einsprungverhalten der herzustellenden Gewebebahn eine Schnittkante zu realisieren, die dem Verlauf der Gewebekante entspricht.The object of the invention is independent of the jump-in behavior of those to be produced Realize a cut edge that corresponds to the course of the fabric edge.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des Patentanspruchs 1 gelöst. Einrichtungsseitig besteht die Erfindung darin, dass an einem feststehenden Teil einer an sich bekannten Schneideinrichtung zum Freischneiden der Gewebekante einer herzustellenden Gewebebahn ein Führungselement angeordnet ist, das mit der freigeschnittenen Gewebekante federelastisch in Kontakt steht und dadurch die Schneideinrichtung der Gewebekante auch bei Gewebeeinsprüngen nachgeführt wird.According to the invention the object is achieved by the features of patent claim 1. On the device side, the invention consists in that on a fixed part one per se known cutting device for cutting free the tissue edge of a to be produced Fabric web a guide element is arranged with the cut-away fabric edge resiliently in contact and thus also the cutting device of the fabric edge is tracked in the case of tissue jumps.

Dadurch wird erreicht, dass die freizuschneidende Gewebekante über ihre gesamte Länge gleichbleibend lange Schussfadenenden besitzt. D.h. unabhängig davon, ob die Gewebebahn und damit auch die Gewebekanten zu einem sogenannten Gewebeeinsprung nach der Gewebebildung neigen oder nicht, sind die über die Gewebekante hinaus verbleibenden Schussfadenenden immer gleich lang.
In einem Konfektionsprozess ermöglicht eine derartige Schnittkante das Herstellen einer qualitativ hochwertigen Produktkante.This ensures that the fabric edge to be cut has consistently long weft ends over its entire length. That is, regardless of whether or not the fabric web and thus also the fabric edges tend to so-called tissue insertion after fabric formation, the weft thread ends remaining beyond the fabric edge are always of the same length.
In a finishing process, such a cutting edge enables the production of a high quality product edge.

Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen erläutert.The invention is explained below using exemplary embodiments.

In den Zeichnungen zeigen:

Figur 1
eine in der Schneidposition schematisch dargestellte Schneideinrichtung in der Seitenansicht,
Figur 2
die gemäß Figur 1 schematisch dargestellte Schneideinrichtung an einer Gewebekante geführt, in der Draufsicht,
Figur 3
das mit dem Schneidklingenträger verbundene Führungselement gem. Ansicht "x" in Figur 1,
Figur 4
das Führungselement in Kontakt mit der Gewebekante gem. Ansicht "y" in Figur 3,
Figur 5
den maschinenfesten Tragarm zum federbelastenden Aufnehmen der Schneideinrichtung gem. der Schnittlinie B-B in Figur 1.
The drawings show:
Figure 1
a cutting device shown schematically in the cutting position in side view,
Figure 2
the cutting device shown schematically according to Figure 1 guided on a fabric edge, in plan view,
Figure 3
the guide element connected to the cutting blade carrier in accordance with. View "x" in Figure 1,
Figure 4
the guide element in contact with the fabric edge acc. View "y" in Figure 3,
Figure 5
the machine-fixed support arm for spring-loaded mounting of the cutting device acc. the section line BB in Figure 1.

Gemäß Figur 1 wird eine auf einer nicht näher dargestellten Webmaschine hergestellte Gewebebahn 8 nacheinander über einen Gewebebreithalter 16, bestehend aus der Kombination einer Gewebestütze 16a mit einem Nadelbreithalter 16b, über eine erste Welle 20 und nachfolgend über eine zweite Welle 21 in Richtung des Pfeiles 22 zu einem nicht dargestellten Warenbaum geführt auf diesem aufgewickelt.
Parallel zum Prozess der Gewebebildung wird an den Rändern der Gewebebahn 8 eine feste Gewebekante 8a hergestellt und wenigstens ausgangsseitig des Webfaches eine sogenannte Fangleiste 15 produziert, in der das Ende jedes Schussfadens 15a fest abgebunden ist, siehe auch Figur 2.
Die Gewebebahn 8 und die Fangeleiste 15 sind bis zum Passieren einer von einem maschinenfesten Träger 17 getragenen Schneideinrichtung 1 durch die Schussfäden 15a miteinander verbunden.
Gemäß dem erfindungsgemäßen Verfahren wird die Gewebekante 8a des Gewebes 8 auf einer vorbestimmten Länge in einem ersten Arbeitsschritt durch Schneiden von der Fangleiste 15 freigeschnitten.
Nach dem Freischneiden der Gewebekante 8a kommt eine mit der in Richtung der Gewebekante 8a federbelasteten Schneideinrichtung 1 verbundenes und relativ zur Gewebebahn 8 einstellbares Führungselement 9 mit der Gewebekante 8a in Kontakt, wodurch die Schneidmittel 3,5 der Schneideinrichtung 1 bzw. die Schneideinrichtung 1 selbst der Gewebekante 8a nachführbar ist. Dabei ist es für das Nachführen unerheblich, ob Gewebe mit einer geringen oder hohen Schussdichte hergestellt werden.
Zum Nachführen ist die Schneideinrichtung erfindungsgemäß, wie nachfolgend beschrieben, ausgebildet.According to FIG. 1, a fabric web 8 produced on a weaving machine, not shown in detail, is closed in succession via a fabric spreader 16, consisting of the combination of a fabric support 16a with a needle spreader 16b, via a first shaft 20 and subsequently via a second shaft 21 in the direction of arrow 22 a goods tree, not shown, wound up on this.
Parallel to the process of fabric formation, a firm fabric edge 8a is produced at the edges of the fabric web 8 and a so-called catch bar 15 is produced at least on the output side of the shed, in which the end of each weft thread 15a is firmly tied, see also FIG. 2.
The fabric web 8 and the catching strip 15 are connected to one another by the weft threads 15a until a cutting device 1 carried by a machine-fixed support 17 passes.
According to the method according to the invention, the tissue edge 8a of the tissue 8 is cut free from the catch strip 15 to a predetermined length in a first working step.
After the tissue edge 8a has been cut free, a guide element 9, which is connected to the cutting device 1 which is spring-loaded in the direction of the fabric edge 8a and is adjustable relative to the fabric web 8, comes into contact with the tissue edge 8a, as a result of which the cutting means 3, 5 of the cutting device 1 and the cutting device 1 itself Fabric edge 8a is trackable. It is irrelevant for tracking whether fabrics with a low or high weft density are produced.
According to the invention, the cutting device is designed for tracking, as described below.

An einem maschinenfest angeordneten Träger 17, am besten zu sehen in Figur 5, ist um die Mittenachse 7a der mit dem Träger 17 verbundenen Drehachse 7 die Schneideinrichtung 1 zwischen einer ersten und einer zweiten Endbegrenzung 11,12 schwenkbar angeordnet, siehe auch Figur 2.
Die Schneideinrichtung 1 besteht aus dem Schwenkkörper 18, der um die vorgenannte Mittenachse 7a der Drehachse 7 drehbeweglich gelagert ist.
Der Schwerkkörper 18 trägt beabstandet von der Drehachse 7 den Antrieb 4, der im Ausführungsbeispiel ein elektromotorischer Antrieb ist.
Mit dem Schwenkkörper 18 sind ferner die feststehende Schneidklinge 3 sowie der Schneidklingenträger 2 mittels der Schrauben 19 verbunden.
Der Schneidklingenträger 2, der parallel neben der beweglichen Schneidklinge 5 liegt, trägt den Klingenbolzen 6, um dessen Mittenachse 6a die Schneidklinge 5 beweglich ist. Beabstandet von der Mittenachse 6a des Klingenbolzens 6 steht die Schneidklinge 5 mit einem exzentrisch zur Mittenachse 4b der Welle 4a des Antriebes 4 gelegenen Mitnehmer 4c in Verbindung.
Um nun die Nachteile der vorbekannten Schneideinrichtung zu vermeiden, ist erfindungsgemäß an einem feststehenden Teil der Schneideinrichtung 1 ein mit der Kante 8a des Gewebes 8 in Kontakt stehendes Führungselement 9 angeordnet, siehe auch Figur 2. Das Führungsteil 9 besteht gemäß Figur 4 aus einem endseitig ein etwa u-förmiges Profil 9a tragenden Stift 9b.
Gemäß Figur 3 und 4 ist der Stift 9b in der Führung 10c eines Haltemittels 10 verstellbar aufgenommen und mittels einer Klemmschraube 10b arretierbar.
Das Haltemittel 10 ist in Fortführung seiner Längsmittenachse 10a in Art einer Schraube ausgebildet. Das Schraubenteil ist an dem Schneidklingenträger 2 mittels der Muttern 10d und 10e befestigt. The cutting device 1 is arranged on a machine-fixed support 17, best seen in FIG. 5, about the central axis 7a of the axis of rotation 7 connected to the support 17, between a first and a second end limitation 11, 12, see also FIG. 2.
The cutting device 1 consists of the swivel body 18 which is rotatably mounted about the aforementioned central axis 7a of the axis of rotation 7.
The gravity body 18 carries the drive 4 at a distance from the axis of rotation 7, which is an electromotive drive in the exemplary embodiment.
The fixed cutting blade 3 and the cutting blade carrier 2 are also connected to the swivel body 18 by means of the screws 19.
The cutting blade carrier 2, which lies parallel to the movable cutting blade 5, carries the blade bolt 6, about the center axis 6a of which the cutting blade 5 is movable. Spaced from the center axis 6a of the blade bolt 6, the cutting blade 5 is connected to a driver 4c eccentrically to the center axis 4b of the shaft 4a of the drive 4.
In order to avoid the disadvantages of the known cutting device, according to the invention a guide element 9 which is in contact with the edge 8a of the fabric 8 is arranged on a fixed part of the cutting device 1, see also FIG. 2. According to FIG. 4, the guide part 9 consists of an end approximately U-shaped profile 9a supporting pin 9b.
According to FIGS. 3 and 4, the pin 9b is adjustably received in the guide 10c of a holding means 10 and can be locked by means of a clamping screw 10b.
The retaining means 10 is designed in the manner of a screw in continuation of its longitudinal center axis 10a. The screw part is fastened to the cutting blade carrier 2 by means of the nuts 10d and 10e.

Gemäß Figur 5 ist auf dem freien Ende des maschinenfesten Trägers 17, der den Klingenträger 2, die Schneidklinge 3, die Schneidklinge 5 und den Antrieb 4 tragende Schwerkkörper 18 schwenkbar um die Mittenachse 7a der Drehachse 7 aufgenommen. Die Drehachse 7 durchgreift dabei vertikal im Bereich des freien Endes den Träger 17 derart, dass die Enden der Drehachse 7 die Schwenklagerung für die Schneideinrichtung 1 insgesamt bildet.
In einem wählbarem Abstand von der Mittenachse 7a der Drehachse 7 ist zwischen dem Träger 17 und dem Schwenkkörper 18 ein Federelement 14 integriert, das auf den Schwenkkörper 18 und damit auf die gesamte Schneideinrichtung 1 permanent ein Drehmoment um die Mittenachse 7a erzeugt.
Das Drehmoment gewährleistet, dass das Führungselement 9 die Schneideinrichtung 1 der freigeschnittenen Gewebekante 8 nachführt.
Bei dem Federelement 14 handelt es sich vorzugsweise um eine Druckfeder, die in einer Aufnahme 18a des Schwenkkörpers 18 gehalten ist und am Träger 17 flächig bei 13 angreift und wobei deren Kraft mittels eines in dem Schwenkkörper 18 einschraubbaren und durch eine Mutter 14b arretierbaren Gewindestiftes 14a einstellbar ist. According to FIG. 5, on the free end of the machine-fixed support 17, the heavy body 18 carrying the blade support 2, the cutting blade 3, the cutting blade 5 and the drive 4 is pivotably received about the central axis 7a of the axis of rotation 7. The axis of rotation 7 extends vertically through the carrier 17 in the region of the free end such that the ends of the axis of rotation 7 form the pivot bearing for the cutting device 1 as a whole.
At a selectable distance from the center axis 7a of the axis of rotation 7, a spring element 14 is integrated between the carrier 17 and the swivel body 18, which permanently generates a torque about the center axis 7a on the swivel body 18 and thus on the entire cutting device 1.
The torque ensures that the guide element 9 tracks the cutting device 1 of the cut-away tissue edge 8.
The spring element 14 is preferably a compression spring which is held in a receptacle 18a of the swivel body 18 and engages the support 17 flatly at 13 and whose force can be adjusted by means of a threaded pin 14a which can be screwed into the swivel body 18 and locked by a nut 14b is.

ZEICHNUNGS-LEGENDEDRAWING LEGEND

0101
SchneideinrichtungCutting device
0202
SchneidklingenträgerCutting blade holder
0303
SchneidklingeCutting blade
0404
Antriebdrive
04a04a
Wellewave
04b04b
MittenachseCenter axis
04c04c
MitnehmerCarrier
0505
SchneidklingeCutting blade
0606
KlingenbolzenBlade bolt
06a06a
MittenachseCenter axis
0707
DrehachseAxis of rotation
07a07a
MittenachseCenter axis
0808
GewebebahnFabric web
08a08a
GewebekanteFabric edge
08b08b
SchnittkanteCutting edge
0909
FederelementSpring element
09a09a
Profilprofile
09b09b
Stiftpen
1010th
HaltemittelHolding means
10a10a
LängsmittenachseLongitudinal center axis
10b10b
KlemmschraubeClamping screw
10c10c
Führungguide
10d10d
Muttermother
10e10e
Muttermother
1111
EndbegrenzungEnd limit
1212th
EndbegrenzungEnd limit
1313
AngriffsflächeTarget
1414
Federelement Spring element
14a14a
GewindestiftGrub screw
14b14b
Muttermother
1515
FangleisteSafety edge
15a15a
SchussfadenWeft
15b15b
KettfadenWarp thread
1616
GewebebreithalterFabric spreader
16a16a
GewebestützeTissue support
16b16b
NadelbreithalterNeedle spreader
1717th
Trägercarrier
1818th
SchwenkkörperSwivel body
18a18a
Aufnahmeadmission
1919th
Schraubescrew
2020th
Wellewave
2121
Wellewave
2222
GewebeabzugTissue deduction

Claims (11)

Schneideinrichtung in Webmaschinen umfassend: einen Schwenkkörper (18), einen fest mit dem Schwenkkörper (18) verbundenen Schneidklingenträger (2), eine mit einem elektromotorischen Antrieb (4) in Verbindung stehende bewegliche Schneidklinge (5), die um die Mittenachse (6a) des Klingenbolzens (6) der Schneideinrichtung schwenkbar angeordnet ist, eine feststehende Schneidklinge (3) und eine beabstandet von dem Klingenbolzen (6) angeordnete maschinenfeste Drehachse (7), um deren Mittenachse (7a) die Schneideinrichtung (1) etwa in der Ebene der durch einen Gewebebreithalter (16) unterstützten Gewebebahn (8) federbelastend schwenkbar ist, dadurch gekennzeichnet, dass an einem feststehenden Teil (2;3) der Schneideinrichtung (1) beabstandet von dem Klingenbolzen (6) ein mit der Kante (8a) der Gewebebahn (8) federbelastet in Kontakt stehendes Führungselement (9) zum Führen der Schneideinrichtung (1) angeordnet ist.Cutting device in weaving machines comprising: a swivel body (18), a cutting blade carrier (2) fixedly connected to the swivel body (18), a movable cutting blade (5) which is connected to an electric motor drive (4) and which is arranged pivotably about the central axis (6a) of the blade bolt (6) of the cutting device, a fixed cutting blade (3) and a machine-fixed axis of rotation (7) arranged at a distance from the blade bolt (6), about the center axis (7a) of which the cutting device (1) can be pivoted in a spring-loaded manner approximately in the plane of the fabric web (8) supported by a fabric spreader (16), characterized in that on a fixed part (2; 3) of the cutting device (1) spaced apart from the blade bolt (6) a guide element (9) which is spring-loaded in contact with the edge (8a) of the fabric web (8) for guiding the cutting device ( 1) is arranged. Schneideinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das feststehende Teil der Schneideinrichtung (1) der Schneidklingenträger (2) ist.Cutting device according to claim 1, characterized in that the fixed part of the cutting device (1) is the cutting blade carrier (2). Schneideinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das feststehende Teil der Schneideinrichtung (1) die feststehende Schneidklinge (3) ist.Cutting device according to claim 1, characterized in that the fixed part of the cutting device (1) is the fixed cutting blade (3). Schneideinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Führungselement (9) aus einem etwa u-förmigen Profil (9a) und aus einem das Profil endseitig tragenden Stift (9b) besteht. Cutting device according to claim 1, characterized in that the guide element (9) consists of an approximately U-shaped profile (9a) and a pin (9b) supporting the profile at the end. Schneideinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Schneideinrichtung (1) zwischen einer gewebeseitigen und einer fangleistenseitigen Endbegrenzung (11;12) schwenkbar um die Mittenachse (7a) der Drehachse (7) gelagert ist.Cutting device according to claim 1, characterized in that the cutting device (1) is pivotally mounted about a central axis (7a) of the axis of rotation (7) between an end limitation (11; 12) on the fabric side and on the catch side. Schneideinrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die gewebeseitige Endbegrenzung (11) in einem Abstand (x) von der Schneideinrichtung (1) angeordnet ist und wobei der Abstand (x) dem Maß des maximalen Gewebeeinsprungs nach dem Gewebebreithalter (16) entspricht.Cutting device according to claim 5, characterized in that the fabric-side end boundary (11) is arranged at a distance (x) from the cutting device (1) and wherein the distance (x) corresponds to the measure of the maximum tissue insertion after the fabric spreader (16). Schneideinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass an einer von der Mittenachse (7a) der Drehachse (7) entfernt liegenden Angriffsfläche (13) ein Federelement (14) auf die Schneideinrichtung (1) und somit auf das Führungselement (9) wirksam ist.Cutting device according to Claim 1, characterized in that a spring element (14) acts on the cutting device (1) and thus on the guide element (9) on an engagement surface (13) which is remote from the center axis (7a) of the axis of rotation (7). Schneideinrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die wirksame Kraft des Federelementes (14) auf die Schneideinrichtung (1) durch geeignete Mittel (14a,14b) einstellbar ist.Cutting device according to claim 7, characterized in that the effective force of the spring element (14) on the cutting device (1) is adjustable by suitable means (14a, 14b). Schneideinrichtung nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, dass der Stift (9b) in einem an dem feststehenden Schneidklingenträger (2) angeordneten Haltemittel (10) aufgenommen ist.Cutting device according to claims 1 to 4, characterized in that the pin (9b) is received in a holding means (10) arranged on the fixed cutting blade carrier (2). Schneideinrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die Mittenachse (10a) des am Schneidklingenträger (2) angeordneten Haltemittels (10) derart festgelegt ist, dass das Führungselement (9) nach dem Schnittpunkt der Schneidklingen (3,5) mit der Gewebekante (8a) in Kontakt ist.Cutting device according to claim 9, characterized in that the central axis (10a) of the holding means (10) arranged on the cutting blade carrier (2) is fixed such that the guide element (9) after the intersection of the cutting blades (3, 5) with the fabric edge (8a ) is in contact. Schneideinrichtung nach den Ansprüchen 1 bis 10, dadurch gekennzeichnet, dass das Führungselement (9) relativ zur Gewebekante (8a) einstellbar ist.Cutting device according to claims 1 to 10, characterized in that the guide element (9) is adjustable relative to the fabric edge (8a).
EP99101919A 1998-02-19 1999-01-29 Cutting device for looms Expired - Lifetime EP0937798B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19806953A DE19806953C2 (en) 1998-02-19 1998-02-19 Cutting device in weaving machines
DE19806953 1998-02-19

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EP0937798B1 EP0937798B1 (en) 2002-06-12

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US (1) US6102082A (en)
EP (1) EP0937798B1 (en)
JP (1) JPH11279901A (en)
AT (1) ATE219177T1 (en)
DE (2) DE19806953C2 (en)
ES (1) ES2178309T3 (en)
PT (1) PT937798E (en)

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CN112359469B (en) * 2020-10-29 2022-05-13 佛山市东成立亿纺织有限公司 Textile fabric processing technology

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ES2178309T3 (en) 2002-12-16
ATE219177T1 (en) 2002-06-15
EP0937798B1 (en) 2002-06-12
PT937798E (en) 2002-11-29
US6102082A (en) 2000-08-15
DE59901688D1 (en) 2002-07-18
JPH11279901A (en) 1999-10-12
DE19806953C2 (en) 2000-03-02
DE19806953A1 (en) 1999-08-26

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