EP0446561B1 - Shuttleless loom with inserting tapes and spacing elements for the grippers - Google Patents

Shuttleless loom with inserting tapes and spacing elements for the grippers Download PDF

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Publication number
EP0446561B1
EP0446561B1 EP90810998A EP90810998A EP0446561B1 EP 0446561 B1 EP0446561 B1 EP 0446561B1 EP 90810998 A EP90810998 A EP 90810998A EP 90810998 A EP90810998 A EP 90810998A EP 0446561 B1 EP0446561 B1 EP 0446561B1
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EP
European Patent Office
Prior art keywords
gripper
weaving machine
machine according
teeth
spacer
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.)
Expired - Lifetime
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EP90810998A
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German (de)
French (fr)
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EP0446561A1 (en
Inventor
Angelo Stacher
Rudolf Vogel
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Itema Switzerland Ltd
Original Assignee
Sultex AG
Maschinenfabrik Rueti AG
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Publication of EP0446561A1 publication Critical patent/EP0446561A1/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
    • D03D47/277—Guide mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers

Definitions

  • the invention relates to a rapier weaving machine with entry belts and with spacing elements for the rapiers.
  • the rapier gripper In rapier weaving machines, which are in widespread use today, the rapier gripper enters the weft thread in the central area of the shed, where it is taken over by the slave rapier.
  • the shed weaving machine starts the shed closing movement during the comparatively slow gripper pull-out movement.
  • the warp threads lie on the loading track and the grippers slide with their entry belts on this base formed by the warp threads and loading track.
  • the warp threads of the lower shed are deflected around the reed-side hinge edge, which leads to signs of wear and tear on the hinge edge.
  • the damaged belt edge in turn then results in a frictional stress with yarn damage which affects the warp threads.
  • This object is achieved according to the invention in that when the shed is open, an at least approximately constant distance between the entry belt and the lower compartment is provided, this distance being at least greater than half the height that the bringer gripper head has between the belt and its apex line.
  • the distance between the entry belt and the lower compartment is established by means of sliding bodies which are attached to the underside of the gripper heads.
  • the second solution is obtained by means of spacer teeth which are attached to the sley and which ensure the distance between the warp threads.
  • the spacer teeth are similar to guide teeth, as are known for example from DE-OS 2439802.
  • the spacing teeth have a straight, essentially horizontal upper edge oriented in the warp direction, that is to say they have no extensions for guiding the gripper heads and / or feed belts.
  • the combination of the two solutions according to the invention is also possible.
  • Today's rapier weaving machines in which the tapes slide on the warp threads of the lower shed, can easily be converted in order to realize one of the two or the combination of both solutions according to the invention.
  • the lower compartment must be in relation to the two belt wheels with which the entry belts of the The grippers are oscillated back and forth, moved slightly downwards to create an at least approximately constant distance between the belt and the lower compartment.
  • the tapes are made of a bendable material; however, they are stiff enough that - in the case of the rapier heads with sliding bodies - they sag only slightly between the belt wheel and the rapier head even when the rapier is fully inserted into the shed.
  • the center of gravity of the gripper head lies far above the level in which the entry belt runs and engages the gripper head. This results in a torque during the insertion movement, which results in a movement which is difficult to control and tends to lift off the gripper head.
  • the center of gravity shifts in the direction of the belt level. This tends to moderate or even eliminate the above-mentioned tendency to lift off when the common center of gravity of the gripper head and sliding body lies in the belt plane.
  • an abrasion-resistant plastic or a metallic alloy can be selected as the material for the sliding bodies.
  • the entry belts are supported in addition to the gripper heads.
  • the warp thread support can be dispensed with in this case, which must be arranged between the reed and the shafts in the conventional rapier weaving machines in order to ensure that the warp threads lie evenly on the loading track.
  • the omission of the warp thread support results in a larger angle of the open shed.
  • a larger compartment opening is advantageous for fibrous yarns; because such tend to cling, which means that neighboring warp threads, in which one has to be brought into the upper compartment and another into the lower compartment, remain attached to one another due to the fibers protruding from the yarn.
  • FIG. 1 The following parts of the rapier weaving machine can be seen in FIG. 1: the sley 1 with the reed 2, the rapier head 3, the entry belt 4, the belt wheel 5, the machine frame 6a, the floor 6b, the fabric 8a and the fabric tree 8b. Furthermore, three altitudes related to the gripper head 3 are indicated by dashed lines S, B and U.
  • the line S indicates the apex height of the bringer gripper head, which is not shown in FIG. 1.
  • Line B indicates the belt level and line U the position of the sub-compartment when the shed is fully open. In previous rapier weaving machines without guide teeth, lines U and B practically coincide.
  • the gripper head 3a and slave gripper head 3b shown schematically in FIG. 2 have the sliding bodies 10a and 10b according to the invention, which together with the Entry belts 4a and 4b are attached.
  • the two rapier heads, just as their relative positions are drawn, are about to transfer the weft thread.
  • the height positions S, B and U explained with reference to FIG. 1 are again shown in the space between the gripper heads.
  • the three dashed lines are on the vertical plane which runs through the center of the bands 4a and 4b.
  • the line U touches the sliding bodies 10a, b on their bases.
  • the distance between the lines B and U is equal to the distance a between the belt and the lower compartment, and the distance between B and S is equal to the height g of the carrier gripper head 3a without sliding body 10a.
  • the distance a should be at least half the height g.
  • FIG. 3 shows a sley 1 to which spacer teeth 20 according to the invention are fastened with a fastening element 30.
  • the U-shaped fastening element 30 has slots for the teeth 20 and is screwed onto the drawer 1.
  • the number of teeth 20 per fastening element 30 need not be exactly two, as is shown in FIG.
  • the teeth 20 protrude into the shed spanned by the warp threads 7a of the upper compartment and the warp threads 7b of the lower compartment. So that when the shed is opened the warp threads 7b can dip well between the teeth 20, the edges of the teeth 20 are chamfered in the upper area so that they form wedges.
  • the distance a is the distance by which the lower compartment in the arrangement according to the invention is shifted downwards with respect to the belt plane.
  • the warp threads 7a 'of the upper compartment also shift downwards.
  • the angle f' of the shed increases and changes to the larger angle f.
  • the larger compartment opening alleviates the staple problem with fibrous yarns.

Description

Die Erfindung betrifft eine Greiferwebmaschine mit Eintragsbändern und mit Abstandhalteelementen für die Greifer.The invention relates to a rapier weaving machine with entry belts and with spacing elements for the rapiers.

Bei heute weit verbreiteten Greiferwebmaschinen trägt der Bringergreifer den Schussfaden in den mittleren Bereich des Webfachs ein, wo er durch den Nehmergreifer übernommen wird. Anders als bei Projektilwebmaschinen, bei denen während des Schusseintrags das Fach in offenem Zustand verharrt, setzt bei den Greiferwebmaschinen die Fachschliessbewegung während der vergleichsweise langsamen Greiferauszugsbewegung schon ein. Die Kettfäden liegen auf der Ladebahn auf und die Greifer gleiten mit ihren Eintragsbändern auf dieser durch Kettfäden und Ladebahn gebildeten Unterlage. Bei der Fachschliessbewegung werden die Kettfäden des Unterfachs um die rietseitige Bandkante streifend umgelenkt, was zu beschädigenden Abnutzungserscheinungen an der Bandkante führt. Die beschädigte Bandkante ihrerseits hat dann eine auf die Kettfäden rückwirkende Reibbeanspruchung mit Garnbeschädigung zur Folge.In rapier weaving machines, which are in widespread use today, the rapier gripper enters the weft thread in the central area of the shed, where it is taken over by the slave rapier. In contrast to projectile weaving machines, in which the shed remains in the open state during the weft insertion, the shed weaving machine starts the shed closing movement during the comparatively slow gripper pull-out movement. The warp threads lie on the loading track and the grippers slide with their entry belts on this base formed by the warp threads and loading track. During the shed closing movement, the warp threads of the lower shed are deflected around the reed-side hinge edge, which leads to signs of wear and tear on the hinge edge. The damaged belt edge in turn then results in a frictional stress with yarn damage which affects the warp threads.

Es ist Aufgabe der Erfindung, die Reibwechselwirkung zwischen Kettfäden und Eintragsband zu beseitigen oder zumindest zu reduzieren, sodass Garnbeschädigungen durch die Bandkante unterbleiben beziehungsweise seltener auftreten.It is an object of the invention to eliminate or at least reduce the frictional interaction between the warp threads and the entry belt, so that yarn damage is caused by the band edge is absent or occurs less frequently.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass bei geöffnetem Webfach für einen zumindest angenähert konstanten Abstand zwischen Eintragsband und Unterfach gesorgt wird, wobei dieser Abstand zumindest grösser als die Hälfte der Höhe ist, die der Bringergreiferkopf zwischen dem Band und seiner Scheitellinie aufweist.This object is achieved according to the invention in that when the shed is open, an at least approximately constant distance between the entry belt and the lower compartment is provided, this distance being at least greater than half the height that the bringer gripper head has between the belt and its apex line.

Es bestehen zwei verschiedene erfindungsgemässe Lösungen, die beide auf der Verwendung von Abstandhalteelementen beruhen. Bei der ersten Lösung wird der Abstand zwischen Eintragsband und Unterfach mittels Gleitkörpern hergestellt, die an der Unterseite der Greiferköpfe angebracht sind. Die zweite Lösung ergibt sich mittels Abstandhalte-Zähnen, die an der Weblade befestigt sind und die zwischen den Kettfäden durchtretend für den Abstand sorgen. Die Abstandhalte-Zähne weisen Ähnlichkeiten mit Führungszähnen auf, wie sie beispielsweise aus der DE-OS 2439802 bekannt sind. Es besteht allerdings der grundsätzliche Unterschied, dass bei den Abstandhalte-Zähnen die in Kettrichtung orientierte und im wesentlichen horizontale Oberkante gerade ausgeführt ist, also keine Fortsätze zwecks Führung der Greiferköpfe und/oder Eintragsbänder aufweist. Die Kombination der beiden erfindungsgemässen Lösungen ist auch möglich.There are two different solutions according to the invention, both of which are based on the use of spacer elements. In the first solution, the distance between the entry belt and the lower compartment is established by means of sliding bodies which are attached to the underside of the gripper heads. The second solution is obtained by means of spacer teeth which are attached to the sley and which ensure the distance between the warp threads. The spacer teeth are similar to guide teeth, as are known for example from DE-OS 2439802. There is, however, the fundamental difference that the spacing teeth have a straight, essentially horizontal upper edge oriented in the warp direction, that is to say they have no extensions for guiding the gripper heads and / or feed belts. The combination of the two solutions according to the invention is also possible.

Die Erfindung ist in den Ansprüchen 1 und 2 dargelegt. Vorteilhafte Weiterbildungen sind in den Onteransprüchen enthalten.The invention is set out in claims 1 and 2. Advantageous further developments are contained in the online claims.

Heute bestehende Greiferwebmaschinen, bei denen die Bänder auf den Kettfäden des Unterfachs gleiten, lassen sich leicht umbauen, um eine der beiden oder die Kombination beider erfindungsgemässen Lösungen zu verwirklichen. Bei einem solchen Umbau muss das Unterfach bezüglich den beiden Bandräder, mit denen die Eintragsbänder der Greifer oszillierend hin- und herbewegt werden, etwas nach unten versetzt werden, um einen zumindest angenähert konstanten Abstand zwischen Band und Unterfach herzustellen. Die Bänder sind aus einem biegbaren Material gefertigt; sie sind aber steif genug, dass sie - im Fall der Greiferköpfe mit Gleitkörpern - zwischen Bandrad und Greiferkopf auch bei vollständig ins Webfach eingeführtem Greifer nur geringfügig durchhängen.Today's rapier weaving machines, in which the tapes slide on the warp threads of the lower shed, can easily be converted in order to realize one of the two or the combination of both solutions according to the invention. In such a conversion, the lower compartment must be in relation to the two belt wheels with which the entry belts of the The grippers are oscillated back and forth, moved slightly downwards to create an at least approximately constant distance between the belt and the lower compartment. The tapes are made of a bendable material; however, they are stiff enough that - in the case of the rapier heads with sliding bodies - they sag only slightly between the belt wheel and the rapier head even when the rapier is fully inserted into the shed.

Bei den bisherigen Greifern liegt der Schwerpunkt des Greiferkopfs weit über der Ebene, in der das Eintragsband läuft und am Greiferkopf angreift. Daher ergibt sich während der Einführbewegung ein Drehmoment, das eine schwer kontrollierbare Bewegung mit Tendenz des Abhebens des Greiferkopfs zur Folge hat. Mit den Gleitkörpern auf der Unterseite der Greiferköpfe verschiebt sich der Schwerpunkt in Richtung Bandebene. Damit wird die erwähnte Tendenz des Abhebens gemässigt oder sogar eliminiert, wenn der gemeinsame Schwerpunkt von Greiferkopf und Gleitkörper in die Bandebene zu liegen kommt. Als Material für die Gleitkörper kann beispielsweise ein abriebfester Kunststoff oder eine metallische Legierung gewählt werden.With previous grippers, the center of gravity of the gripper head lies far above the level in which the entry belt runs and engages the gripper head. This results in a torque during the insertion movement, which results in a movement which is difficult to control and tends to lift off the gripper head. With the sliders on the underside of the gripper heads, the center of gravity shifts in the direction of the belt level. This tends to moderate or even eliminate the above-mentioned tendency to lift off when the common center of gravity of the gripper head and sliding body lies in the belt plane. For example, an abrasion-resistant plastic or a metallic alloy can be selected as the material for the sliding bodies.

Bei der Lösung mit Abstandhalte-Zähnen werden zusätzlich zu den Greiferköpfen auch die Eintragsbänder gestützt. Ferner kann in diesem Fall auf die Kettfadenstütze verzichtet werden, die bei den gebräuchlichen Greiferwebmaschinen notwendigerweise zwischen Riet und den Schäften angeordnet sein muss, um ein gleichmässiges Aufliegen der Kettfäden auf der Ladebahn zu gewährleisten. Durch den Wegfall der Kettfadenstütze ergibt sich ein grösserer Winkel des geöffneten Webfaches. Eine grössere Fachöffnung ist vorteilhaft bei faserigen Garnen; denn solche neigen zum Klammern, was heissen soll, dass benachbarte Kettfäden, bei denen einer ins Oberfach und ein anderer ins Unterfach gebracht werden muss, durch die aus dem Garn herausstehenden Fasern aneinander hängen bleiben. Je weiter sich das Fach öffnen lässt, desto besser lösen sich klammernde Kettfäden voneinander. Klammernde Kettfäden sind schädlich, da durch sie Kettfadenbrüche entstehen können oder der Schussfaden falsch eingetragen ("Fehlselektion") werden kann.In the solution with spacer teeth, the entry belts are supported in addition to the gripper heads. Furthermore, the warp thread support can be dispensed with in this case, which must be arranged between the reed and the shafts in the conventional rapier weaving machines in order to ensure that the warp threads lie evenly on the loading track. The omission of the warp thread support results in a larger angle of the open shed. A larger compartment opening is advantageous for fibrous yarns; because such tend to cling, which means that neighboring warp threads, in which one has to be brought into the upper compartment and another into the lower compartment, remain attached to one another due to the fibers protruding from the yarn. The further the compartment can be opened, the better the clinging warp threads separate from each other. Clamping warp threads are harmful because they can cause warp thread breaks or the weft thread can be entered incorrectly ("incorrect selection").

Ein kennzeichnendes Merkmal der Erfindung, dass nämlich ein Abstand zwischen Eintragsband und Unterfach besteht, ist besonders bei Kettfäden aus Filamentgarnen vorteilhaft. Denn bei solchen führt die Reibbeanspruchung durch beschädigte Eintragsbänder sehr schnell zu Kettfadenbrüchen.A characteristic feature of the invention, namely that there is a distance between the entry belt and the lower compartment, is particularly advantageous for warp threads made of filament yarns. Because in such cases the stress caused by damage caused by damaged entry belts very quickly leads to warp thread breaks.

Der grundsätzliche Unterschied zwischen Führungszähnen und den erfindungsgemässen Abstandhalte-Zähnen sei noch erläutert: Da die Bandräder ortsfest am Maschinengestell befestigt sind, darf sich die Weblade während der gesamten Eintragsbewegung einschliesslich der Greiferauszugsbewegung nicht bewegen, wenn Führungszähne vorhanden sind. Wegen der geraden Oberkante gilt diese Einschränkung bei den Abstandhalte-Zähnen nicht; bei diesen ist eine Relativbewegung zwischen Greifer und Zähnen in Kettrichtung möglich und somit ist auch in beschränktem Masse eine gleichzeitige Bewegung von Weblade und Greifer möglich. überdies weisen die Führungszähne noch einen weitern Nachteil auf; es besteht die Gefahr, dass sich die Kettfäden an den Führungsnasen, die Fortsätze an der Oberkante der Zähne bilden, verhängen.The basic difference between guide teeth and the spacer teeth according to the invention is still to be explained: since the belt wheels are fixed in place on the machine frame, the sley must not move during the entire entry movement including the gripper pull-out movement if guide teeth are present. Because of the straight upper edge, this restriction does not apply to the spacer teeth; with these a relative movement between the gripper and teeth in the warp direction is possible and thus a simultaneous movement of the sley and the gripper is also possible to a limited extent. moreover, the guide teeth have a further disadvantage; there is a risk of the warp threads becoming caught on the guide lugs, which form extensions on the upper edge of the teeth.

Im folgenden wird die Erfindung anhand der Figuren näher erläutert. Es zeigen:

Fig.1
die Ansicht auf eine Hälfte einer Greiferwebmaschine, von der Warenseite her gesehen,
Fig.2
ein Paar von Greiferköpfen mit erfindungsgemässen Gleitkörpern,
Fig.3
einen Ausschnitt aus einer Weblade mit erfindungsgemässen Abstandhalte-Zähnen und
Fig.4
einen Querschnitt durch Webfach und Weblade mit Abstandhalte-Zähnen.
The invention is explained in more detail below with reference to the figures. Show it:
Fig. 1
the view of one half of a rapier weaving machine, seen from the goods side,
Fig. 2
a pair of gripper heads with sliding bodies according to the invention,
Fig. 3
a section of a sley with spacer teeth according to the invention and
Fig. 4
a cross section through the shed and sley with spacer teeth.

In Fig.1 sind folgende Teile der Greiferwebmaschine erkennbar: die Weblade 1 mit dem Riet 2, der Greiferkopf 3, das Eintragsband 4, das Bandrad 5, das Maschinengestell 6a, der Fussboden 6b, das Gewebe 8a und der Warenbaum 8b. Im weitern sind drei auf den Greiferkopf 3 bezogene Höhenlagen durch gestrichelt gezeichnete Linien S, B und U angegeben. Die Linie S gibt die Scheitelhöhe des Bringergreiferkopfes an, der in Fig.1 nicht dargestellt ist. Die Linie B gibt die Bandebene an und die Linie U die Lage des Unterfachs bei vollständig geöffnetem Webfach. Bei bisherigen Greiferwebmaschinen ohne Führungszähne fallen die Linien U und B praktisch zusammen.The following parts of the rapier weaving machine can be seen in FIG. 1: the sley 1 with the reed 2, the rapier head 3, the entry belt 4, the belt wheel 5, the machine frame 6a, the floor 6b, the fabric 8a and the fabric tree 8b. Furthermore, three altitudes related to the gripper head 3 are indicated by dashed lines S, B and U. The line S indicates the apex height of the bringer gripper head, which is not shown in FIG. 1. Line B indicates the belt level and line U the position of the sub-compartment when the shed is fully open. In previous rapier weaving machines without guide teeth, lines U and B practically coincide.

Die in Fig.2 schematisch dargestellten Bringergreiferkopf 3a und Nehmergreiferkopf 3b weisen die erfindungsgemässen Gleitkörper 10a beziehungsweise 10b auf, die an der Unterseite der Greiferköpfe zusammen mit den Eintragsbändern 4a und 4b befestigt sind. Die beiden Greiferköpfe stehen, so wie deren relativen Positionen gezeichnet sind, kurz vor der Übergabe des Schussfadens. Im Zwischenraum zwischen den Greiferköpfen sind wieder die anhand der Fig.1 erklärten Höhenlagen S, B und U eingezeichnet. Die drei gestrichelten Linien befinden sich auf der vertikalen Ebene, die durch die Mitte der Bänder 4a und 4b verläuft. Die Linie U berührt die Gleitkörper 10a, b an deren Grundflächen. Bei Vernachlässigung der Dicke des Eintragbands ist der Abstand zwischen den Linien B und U gleich dem Abstand a, der zwischen dem Band und dem Unterfach liegt, und der Abstand zwischen B und S ist gleich der Höhe g des Bringergreiferkopfes 3a ohne Gleitkörper 10a. Erfindungsgemäss soll der Abstand a mindestens die Hälfte der Höhe g aufweisen.The gripper head 3a and slave gripper head 3b shown schematically in FIG. 2 have the sliding bodies 10a and 10b according to the invention, which together with the Entry belts 4a and 4b are attached. The two rapier heads, just as their relative positions are drawn, are about to transfer the weft thread. The height positions S, B and U explained with reference to FIG. 1 are again shown in the space between the gripper heads. The three dashed lines are on the vertical plane which runs through the center of the bands 4a and 4b. The line U touches the sliding bodies 10a, b on their bases. If the thickness of the entry belt is neglected, the distance between the lines B and U is equal to the distance a between the belt and the lower compartment, and the distance between B and S is equal to the height g of the carrier gripper head 3a without sliding body 10a. According to the invention, the distance a should be at least half the height g.

Das Schrägbild der Fig.3 zeigt eine Weblade 1, an der erfindungsgemässe Abstandhalte-Zähne 20 mit einem Befestigungselement 30 befestigt sind. Das U-förmige Befestigungselement 30 weist Schlitze für die Zähne 20 auf und ist auf der Lade 1 angeschraubt. Die Anzahl Zähne 20 pro Befestigungselement 30 braucht selbstverständlich nicht gerade zwei zu sein, wie es in Fig.3 dargestellt ist. Die Zähne 20 ragen in das durch die Kettfäden 7a des Oberfachs und die Kettfäden 7b des Unterfachs aufgespannte Webfach hinein. Damit beim öffnen des Webfachs die Kettfäden 7b gut zwischen den Zähnen 20 abtauchen können, sind die Kanten der Zähne 20 im obern Bereich angeschrägt, sodass sie Keile bilden.3 shows a sley 1 to which spacer teeth 20 according to the invention are fastened with a fastening element 30. The U-shaped fastening element 30 has slots for the teeth 20 and is screwed onto the drawer 1. Of course, the number of teeth 20 per fastening element 30 need not be exactly two, as is shown in FIG. The teeth 20 protrude into the shed spanned by the warp threads 7a of the upper compartment and the warp threads 7b of the lower compartment. So that when the shed is opened the warp threads 7b can dip well between the teeth 20, the edges of the teeth 20 are chamfered in the upper area so that they form wedges.

In Ergänzung zur Fig.3 zeigt Fig.4 einen Querschnitt durch die gleiche Anordnung, jedoch mit einigen zusätzlichen Angaben. Ergänzend ist folgendes angegeben: ein Schnitt durch den eine Höhe g aufweisenden Bringergreiferkopf 3a mit dem Band 4a und mit innern Komponenten (z.B. Fadenklemme), die schematisch als Kästchen 3c dargestellt sind; eine Gewebestütze 9a; strichpunktiert das Webfach einer bisherigen Greiferwebmaschine, bei der die Kettfäden 7b' des Unterfachs durch die Kettfadenstütze 9b' etwas angehoben werden. Der Übergang von der bisherigen zur erfindungsgemässen Anordnung lässt sich durch ein Absenken der Gewebestütze 9a und der Schaftpositionen sowie durch das Entfernen der Kettfadenstütze 9b' erreichen. Der Abstand a ist, wie schon erläutert, die Distanz, um die das Unterfach in der erfindungsgemässen Anordnung bezüglich der Bandebene nach unten verlagert wird. Gleich wie beim Unterfach verlagern sich die Kettfäden 7a' des Oberfachs auch abwärts. Da aber nun auf die Kettfadenstütze 9b' verzichtet werden kann, vergrössert sich der Winkel f' des Webfachs und geht in den grössern Winkel f über. Wie bereits erwähnt, entschärft sich durch die grössere Fachöffnung das Klammerproblem bei faserigen Garnen.In addition to Figure 3, Figure 4 shows a cross section through the same arrangement, but with some additional information. The following is also indicated: a Section through the bring gripper head 3a having a height g with the band 4a and with internal components (eg thread clamp), which are shown schematically as box 3c; a tissue support 9a; dash-dot line the shed of a previous rapier weaving machine, in which the warp threads 7b 'of the lower shed are slightly raised by the warp thread support 9b'. The transition from the previous arrangement to the arrangement according to the invention can be achieved by lowering the fabric support 9a and the shaft positions and by removing the warp thread support 9b '. As already explained, the distance a is the distance by which the lower compartment in the arrangement according to the invention is shifted downwards with respect to the belt plane. As with the lower compartment, the warp threads 7a 'of the upper compartment also shift downwards. However, since the warp thread support 9b 'can now be dispensed with, the angle f' of the shed increases and changes to the larger angle f. As already mentioned, the larger compartment opening alleviates the staple problem with fibrous yarns.

Claims (10)

  1. Gripper weaving machine with spacer elements for the grippers, wherein each gripper insertion tape (4) has at least an approximately constant distance (a) from the lower shed over the entire insertion width with the shed fully open and wherein the spacer elements are in the form of spacer teeth (20) fixed on the sley, characterised in that the distance (a) is at least greater than half the height (g) which the giver gripper head has between the gripper insertion tape (4) and its zenithal line, and in that the spacer teeth each have a straight and at least approximately horizontal top edge oriented in the warp direction.
  2. Gripper weaving machine with spacer elements for the grippers, wherein each gripper insertion tape (4) has at least an approximately constant distance (a) from the lower shed over the entire insertion width with the shed fully open, characterised in that the spacer elements are in the form of sliding members (10a, 10b) which are mounted on the underside of the gripper heads (3), and in that the distance (a) is at least greater than half the height (g) which the giver gripper head has between the gripper insertion tape (4) and its zenithal line.
  3. A gripper weaving machine according to claim 2 with a giver gripper and/or a taker gripper, wherein the common centre of gravity of the gripper head (3) and the sliding members (10a, 10b) is at least approximately situated at the base of the gripper head.
  4. A gripper weaving machine containing all the features of claims 1 and 2.
  5. A gripper weaving machine according to claim 4 with spacer teeth (20) which have bevelled edges in the top zone entering the warp shed.
  6. A gripper weaving machine according to claim 4 or 5 with fixing elements (30) for the spacer teeth (20), which fixing elements each fix groups of at least two teeth (20) on the sley (1).
  7. A gripper weaving machine according to claim 6 with releasable, more particularly screw-on, fixing elements (30).
  8. A gripper weaving machine according to any one of claims 4 to 7, wherein no warp thread support (9b') is provided for the warp threads of the lower shed.
  9. Use of a gripper weaving machine according to any one of claims 1 to 8 for weaving filament yarn.
  10. Use of a gripper weaving machine according to any one of claims 1 to 8 for weaving warp threads consisting of fibrous yarn having a clinging tendency.
EP90810998A 1990-03-13 1990-12-18 Shuttleless loom with inserting tapes and spacing elements for the grippers Expired - Lifetime EP0446561B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH800/90 1990-03-13
CH80090 1990-03-13

Publications (2)

Publication Number Publication Date
EP0446561A1 EP0446561A1 (en) 1991-09-18
EP0446561B1 true EP0446561B1 (en) 1997-09-10

Family

ID=4195477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810998A Expired - Lifetime EP0446561B1 (en) 1990-03-13 1990-12-18 Shuttleless loom with inserting tapes and spacing elements for the grippers

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US (2) US5135033A (en)
EP (1) EP0446561B1 (en)
JP (1) JPH05209341A (en)
DE (1) DE59010760D1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573727B1 (en) * 1992-06-12 1996-08-28 Sulzer RàœTi Ag Gripper loom
IT1270144B (en) * 1994-05-27 1997-04-29 Nuovo Pignone Spa IMPROVED GUIDE SYSTEM OF THE PLIER INSERTING TAPE IN A TEXTILE FRAME WITHOUT SHUTTLE
ES2116181B1 (en) * 1994-12-05 1999-03-01 Autotex S A MANUFACTURING PROCEDURE FOR A LOW AIR PERMEABILITY INDUSTRIAL FABRIC AND CORRESPONDING MACHINE.
IT1290837B1 (en) * 1996-02-27 1998-12-14 Nuovo Pignone Spa TAPE HEAD PERFECTED FOR TEXTILE CLAMPS AND PROCEDURE FOR ITS REALIZATION
US6672790B2 (en) * 2002-03-01 2004-01-06 George W. Davis Spliced elongate member and method
FR2866032B1 (en) * 2004-02-09 2006-05-05 Ltaief Bouaziz DEVICE FOR TEXTILE AND LENGTH GUIDING MACHINE AND INSERTION AND USE PROJECTILES

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Publication number Priority date Publication date Assignee Title
US2538630A (en) * 1948-07-13 1951-01-16 Warner Swasey Co Lay bar and shuttle guide
BE570321A (en) * 1957-09-24 1900-01-01
BE658330A (en) * 1964-01-17 1900-01-01
US3842869A (en) * 1973-10-09 1974-10-22 Rockwell International Corp Tapeguide raceway for rapier loom
DE2902729C2 (en) * 1979-01-25 1982-04-01 Lindauer Dornier Gmbh, 8990 Lindau Weft insertion element for shuttleless looms
DD225863A3 (en) * 1983-09-27 1985-08-07 Textimaforschung Malimo Veb Weft insertion apparatus
IT1171737B (en) * 1983-10-10 1987-06-10 Vamatex Spa HOOK FOR GUIDING OF CLAMP-HOLDER TAPES INSIDE THE PITCH OF WEAVING FRAMES AND GUIDE COMPLEX WITH IT REALIZABLE
EP0199880A1 (en) * 1985-05-03 1986-11-05 GebràœDer Sulzer Aktiengesellschaft Weft insertion device for looms, especially for gripper shuttle looms
DE3519685C1 (en) * 1985-06-01 1986-08-28 Lindauer Dornier Gmbh, 8990 Lindau Fastening device for interchangeably arranged guiding bodies on non-contact looms
IT1227335B (en) * 1988-09-08 1991-04-08 Vamatex Spa MEANS FOR DRIVING THE MOTOR OF WEFT FEED PLIERS INSIDE THE PITCH OF WEAVING FRAMES WITHOUT SHUTTLES
DE4000686A1 (en) * 1990-01-12 1991-07-18 Dornier Gmbh Lindauer BRIDGE SHOE SOLE FOR A GRIPPER WEAVING MACHINE

Also Published As

Publication number Publication date
USRE35400E (en) 1996-12-17
JPH05209341A (en) 1993-08-20
DE59010760D1 (en) 1997-10-16
EP0446561A1 (en) 1991-09-18
US5135033A (en) 1992-08-04

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