EP0198145A1 - Process for operating gripper looms, and device for applying the same - Google Patents

Process for operating gripper looms, and device for applying the same Download PDF

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Publication number
EP0198145A1
EP0198145A1 EP85810172A EP85810172A EP0198145A1 EP 0198145 A1 EP0198145 A1 EP 0198145A1 EP 85810172 A EP85810172 A EP 85810172A EP 85810172 A EP85810172 A EP 85810172A EP 0198145 A1 EP0198145 A1 EP 0198145A1
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EP
European Patent Office
Prior art keywords
belt
entry
shed
weaving
gripper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85810172A
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German (de)
French (fr)
Inventor
Anton Egloff
Lothar Köhler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
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Publication date
Application filed by Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Priority to EP85810172A priority Critical patent/EP0198145A1/en
Publication of EP0198145A1 publication Critical patent/EP0198145A1/en
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick

Definitions

  • the invention relates to a method for the operation of a belt rapier weaving machine with a weft insertion belt carrying a thread rapier.
  • the invention further relates to an apparatus for performing the method.
  • the invention is of particular importance when using a carbon fiber reinforced entry belt, as well as with certain weaves, e.g. Ribs.
  • the entry bar is coated at one or more points that lie between the guide rollers for the entry bar.
  • the coating material is fed to the guide rollers during the entry and delivered to them, as a result of which the guide rollers are lubricated free of oil and grease.
  • the entry bar enters the shed largely without any coating.
  • the invention has for its object to provide a method and an associated device which is particularly improved in this regard.
  • the method according to the invention consists in that the entry belt is coated with a smoothing material, preferably plastic, on at least part of its cross-sectional circumference before it enters the shed and is then moved into the shed while the weft is being inserted while maintaining this applied smoothing layer.
  • a smoothing material preferably plastic
  • the device for performing the method is characterized by a made of an abrasive, e.g. Plastic existing rubbing element located on the entry path of the entry belt outside the shed and in contact with the entry belt.
  • the coating on the entry belt is carried into the shed and is not transferred or transferred to other parts of the weaving machine before the shed is reached can result in the edges of the entry belt, in particular the rear edge facing the reed, being smoothed are.
  • warp threads in particular incorrectly controlled warp threads, come into contact with the entry belt, especially with the rear edge of the entry belt, it can then be avoided that these warp threads are heated and burned (separated or damaged).
  • the belt rapier weaving machine designated as a whole by 1 according to FIG. 1 only the entry belt 3 carrying the carrier rapier 2 and the entry belt 5 carrying the slave rapier 4 are shown.
  • Band 3 runs in a guide 6, band 4 in a guide 7.
  • the belts 3, 5 consist for example of carbon fiber reinforced plastic, e.g. epoxy resin coated with carbon fiber.
  • the parts 2 - 5 are located outside the shed 11, which extends over the weaving width 8 and is formed by the warp threads 9, 10 (cf. FIG. 2).
  • a few edge warp threads 12, 13 are indicated in FIG. 1 on both sides of the weaving width 8.
  • the warp threads 9, 10 run during the weaving operation in the direction of the arrows 14.
  • the compartment is formed by shafts, only one of which is indicated in FIG. 2 and designated by 15.
  • the warp threads 9 located in the upper compartment in FIG. 2 as well as a wrongly controlled warp thread 17 indicated by the dot-dash line are guided through its strands 16.
  • the reed 18 and a warp support 19 are also indicated by the tape gripper machine 1. The reed moves back and forth according to arrow 21.
  • the guide 7 of the entry belt 5 contains a plate 22 attached to the weaving machine frame and two upper guide strips 23, 24 arranged thereon.
  • 33.34 are pivotable according to arrows 35.36, e.g. Coating strips 37, 38 made of tetrafluoroethylene (brand TEFLON) are arranged. They are under the action of spiral springs 41, 42, which endeavor with their angled ends 43, 44 to press the strips 37, 38 against the entry band 5 according to the arrows 35, 36.
  • Coating strips 37, 38 made of tetrafluoroethylene (brand TEFLON) are arranged. They are under the action of spiral springs 41, 42, which endeavor with their angled ends 43, 44 to press the strips 37, 38 against the entry band 5 according to the arrows 35, 36.
  • the operating method of the belt gripper machine 1 proceeds as follows. In the position 2b, 3b, 4b, 5b of the grippers 2, 4 and entry belts 3, 5 shown in dash-dotted lines in FIG. 1, the parts are in the thread transfer position in which the weft thread 30 is currently being transferred from the gripper 2 to the gripper 4 becomes. The parts 2 - 5 then reach the positions shown in solid lines in FIG. 1 outside the weaving width 8 or compartment 11. There is a change of compartment. All or part of the shafts change their new position. At the same time, the reed moves from a rear position 18b, shown in broken lines in FIG. 2, into the front, drawn-out, stop position 18, in which the weft thread 30 is struck against the fabric 51.
  • the insertion members 3, 5 with the grippers 2, 4 are pushed back into the compartment 11.
  • a warp thread 17 shown in dash-dot lines in FIG. Due to the friction of several warp threads located in the same tube (slot) of reed 18, the shaft change caused by the associated shaft 15 does not immediately follow, it can happen that the slave gripper 4 or the associated entry belt 5 is already in the position shown in FIG initial retracted position 4a, 5a indicated by dashed lines.
  • the incorrectly controlled warp thread 17 is in the position 17a running beneath the belt 5, so that during the further movement of the parts 4, 5 running to the right in FIG the high position is hindered.
  • the band 5 is coated on its two edges 55, 56 by the two coating strips 37, 38 with Teflon abrasion 57, 58 indicated in FIG. 3 during its movement into the compartment 8, 11, the edges 55, 56 are particularly smoothed . This prevents the weft thread 17, which is under particular tension, from being heated, in particular at the kink 58, and thus being able to be burnt (separated). Rather, the operation can continue - even if a single, incorrect warp thread position of the thread 17 is accepted. When the entry belt 5 has left the compartment 11 with its gripper 4, the thread 17 can continue to participate in the further weaving operation.
  • the parts 22, 26, 27 forming the guide 7 contain bores 61, 62 into which coating pins 63, 64 made of TEFLON are inserted. These are under the action of compression springs 66 which can be adjusted by means of screws 65, of which only the upper one is shown in FIGS. 6, 7.
  • a tubular holder 72 is fastened to a frame part 71 of the weaving machine 1, into which a coating pin 63 made of TEFLON is inserted. Its lower end is provided with a notch 74, through which only the particularly critical edge 55 facing the reed in position 18b and the shanks 15 is coated.
  • the coating rod 63 is only under the force of its own weight.
  • the guide 6 for the feed belt 3 carrying the gripper 2 is designed in accordance with FIGS. 3-5.
  • circumferential surfaces 81, 82 of the entry belt 5 are coated by appropriate coating elements outside the shed 8, 11 and the belt is inserted into the compartment with a full coating during the weft insertion. If necessary, all surfaces 55, 56, 81, 82 of the circumferential cross section of the band 5 and / or 3 can also be coated.
  • the guide 7 contains a TEFLON on all guide surfaces standing coating layer.
  • the guide 7 can also consist entirely of TEFLON and itself form the coating element for the entry belt.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

In the process for operating a ribbon gripper weaving machine (1), insertion ribbons (3, 5) are coated outside the shed (8, 11) at the edges (55, 56) by means of tetrafluoroethylene strips (37, 38) which act under the influence of springs (41, 42). The ribbons (3, 5) are introduced into the shed (8, 11) on weft insertion while retaining these layers (57, 58). As a consequence the edges (55, 56) are particularly smooth, so that for example stuck, misdirected warp threads (17) can be neither heated, damaged and/or burned off (separated) at the folds (58) despite the tensioned, wrong position (17a). On the contrary, weaving can continue without switching off the weaving machine. The misdirected warp thread (17) can assume the correct position corresponding to the weaving program during the next weft insertion. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren für den Betrieb einer Bandgreifer-Webmaschine mit einem einen Fadengreifer tragenden Schussfadeneintragsband. Ferner bezieht sich die Erfindung auf eine Vorrichtung zur Durchführung des Verfahrens. Die Erfindung hat besondere Bedeutung bei Verwendung eines kohlenfaserverstärkten Eintragsbandes, sowie bei bestimmten Gewebebindungen, z.B. Rips.The invention relates to a method for the operation of a belt rapier weaving machine with a weft insertion belt carrying a thread rapier. The invention further relates to an apparatus for performing the method. The invention is of particular importance when using a carbon fiber reinforced entry belt, as well as with certain weaves, e.g. Ribs.

Bei einer bisherigen Stangengreifer-Webmaschine (DE-PS 27 43 303) wird die Eintragsstange an einer oder mehreren Stellen beschichtet, die zwischen den Führungsrollen für die Eintragsstange liegen. Der Beschichtungsstoff wird während des Eintrages zu den Führungsrollen geführt und an diese abgegeben, wodurch die Führungsrollen öl- und fettfrei geschmiert werden. Infolge der Abgabe des Beschichtungsstoffes an die Führungsrollen gelangt die Eintragsstange weitgehend beschichtungsfrei in das Webfach.In a previous bar rapier weaving machine (DE-PS 27 43 303), the entry bar is coated at one or more points that lie between the guide rollers for the entry bar. The coating material is fed to the guide rollers during the entry and delivered to them, as a result of which the guide rollers are lubricated free of oil and grease. As a result of the release of the coating material to the guide rollers, the entry bar enters the shed largely without any coating.

Es hat sich bei Bandgreifermaschinen gezeigt, dass fehlerhaft gesteuerte Kettfäden insbesondere gegen die hintere, dem Riet zugekehrte Kante des Eintragsbandes geführt werden können. Durch Reibung an dieser Kante können die Kettfäden stark erhitzt und dabei abgebrannt (getrennt bzw. beschädigt) werden.It has been shown in belt gripper machines that incorrectly controlled warp threads can be guided, in particular, against the rear edge of the entry belt facing the reed. By friction on this edge the warp threads can be heated up and burned (separated or damaged).

Der Erfindung liegt die Aufgabe zugrunde, ein besonders in dieser Hinsicht verbessertes Verfahren und eine zugehörige Vorrichtung zu schaffen.The invention has for its object to provide a method and an associated device which is particularly improved in this regard.

Das erfindungsgemässe Verfahren besteht darin, dass das Eintragsband vor seinem Eintritt in das Webfach mindestens an einem Teil seines Querschnittumfanges mit einem Glättungsstoff, vorzugsweise Kunststoff, beschichtet und dann beim Schusseintrag unter Beibehaltung dieser aufgebrachten Glättungsschicht in das Webfach bewegt wird. Die Vorrichtung zur Durchführung des Verfahrens kennzeichnet sich durch ein aus einem Abreibstoff, z.B. Kunststoff bestehendes, am Eintragsweg des Eintragsbandes ausserhalb des Webfaches angeordnetes, in Berührung mit dem Eintragsband stehendes Abreibelement.The method according to the invention consists in that the entry belt is coated with a smoothing material, preferably plastic, on at least part of its cross-sectional circumference before it enters the shed and is then moved into the shed while the weft is being inserted while maintaining this applied smoothing layer. The device for performing the method is characterized by a made of an abrasive, e.g. Plastic existing rubbing element located on the entry path of the entry belt outside the shed and in contact with the entry belt.

Dadurch, dass die Beschichtung auf dem Eintragsband in das Webfach mitgenommen und nicht vor dem Erreichen des Faches an weitere Teile der Webmaschine abgegeben bzw. übertragen wird, kann erreicht werden, dass die Kanten des Eintragsbandes, insbesondere die hinteren, dem Riet zugekehrte Kante, geglättet sind. Bei Berührung von Kettfäden, insbesondere falsch gesteuerten Kettfäden mit dem Eintragsband, besonders mit der hinteren Kante des Eintragsbandes lässt sich dann vermeiden, dass diese Kettfäden erhitzt und abgebrannt(getrennt oder beschädigt) werden.The fact that the coating on the entry belt is carried into the shed and is not transferred or transferred to other parts of the weaving machine before the shed is reached can result in the edges of the entry belt, in particular the rear edge facing the reed, being smoothed are. When warp threads, in particular incorrectly controlled warp threads, come into contact with the entry belt, especially with the rear edge of the entry belt, it can then be avoided that these warp threads are heated and burned (separated or damaged).

Das vorliegende Problem der Abbrennung falsch gesteuerter Kettfäden kann bei Bandgreifer-Webmaschinen auftreten, weil dort der Fachwechsel bei Beginn des Schusseintrages häufig noch nicht vollständig beendet ist. Bei Bandgreifermaschinen gehen die Bewegungsvorgänge von Schäften, Riet und Eintragsband während des Fachwechsels zum Teil mehr oder weniger ineinander über (angenäherte Sinus-Bewegungen). Wenn dabei ein Kettfaden aus irgendeinem Grund während des Fachwechsels zunächst in der bisherigen Position hängen bleibt, kann es vorkommen, dass das Eintragsband bei Beginn seiner bewegung in das neue Fach vor diesen noch in der bisherigen Position befindlichen Faden (falsch gesteuerten Kettfaden) gelangt. Bei der weiteren Bewegung der Teile kann dieser Kettfaden dann das Eintragsband während seiner gesamten Einwärtsbewegung in das Fach und der folgenden Herausbewegung berühren. Dabei kann er beschädigt bzw. abgetrennt werden.The problem of burning incorrectly controlled warp threads can arise with ribbon rapier weaving machines, because there the change of subject at the beginning of the weft insertion is often not completely finished. In the case of belt gripper machines, the movement processes of the shafts, reed and entry belt partly merge more or less into one another during the change of subject (approximate sinus movements). If, for some reason, a warp thread initially gets stuck in the previous position during the change of compartment, it can happen that the entry belt gets into the new compartment in front of this thread (incorrectly controlled warp thread) when it starts to move in the new position. With the further movement of the parts, this warp thread can then touch the entry belt during its entire inward movement into the compartment and the subsequent outward movement. It can be damaged or detached.

Zum Vergleich sei erwähnt, dass ein solcher Betrieb -und damit auch die mögliche Berührung eines falsch gesteuerten Kettfadens in dem erwähnten Sinne -- bei Stangengreifermaschinen nicht möglich ist, weil bei diesen die Eintragsstange erst in das Fach bewegt werden kann, wenn beim Fachwechsel Schäfte und Riet vollständig in der neuen Position sind. Nur in dieser vermag die am Riet geführte Greiferstange in das neue Fach bewegt zu werden. Infolge des späteren Beginnes der Greiferstangenbewegung in das neue Fach ist die Möglichkeit einer Kollision mit falsch gesteuerten bzw. hängengebliebenen Kettfäden praktisch unmöglich.For comparison, it should be mentioned that such operation - and thus the possible touching of an incorrectly controlled warp thread in the sense mentioned - is not possible with bar gripper machines, because with these the entry bar can only be moved into the compartment when shafts and Advised are completely in the new position. Only in this can the gripper bar guided on the reed be moved into the new compartment. Due to the later start of the gripper bar movement in the new compartment, the possibility of a collision with incorrectly controlled or stuck warp threads is practically impossible.

Weitere Merkmale der erfindung ergeben sich aus der folgenden Beschreibung von Ausführungsbeispielen in Verbindung mit der Zeichnung und den Ansprüchen.Further features of the invention result from the following description of exemplary embodiments in conjunction with the drawing and the claims.

  • Fig. 1 zeigt schematisch einen Teil einer nach dem erfindungsgemässen Verfahren arbeitenden Bandgreifer-Webmaschine, in Draufsicht,1 schematically shows a part of a belt rapier weaving machine operating according to the method according to the invention, in a top view,
  • Fig. 2 ist ein zugehöriger Schnitt nach Linie II - II,2 is an associated section along line II - II,
  • Fig. 3 ist ein Detail aus Fig. 1, in grösserem Massstab,3 is a detail from FIG. 1, on a larger scale,
  • Fig. 4 ein Schnitt nach Linie IV - IV in Fig. 3,4 shows a section along line IV-IV in FIG. 3,
  • Fig. 5 eine zu Fig. 3 gehörige Draufsicht,5 is a plan view belonging to FIG. 3,
  • Fig. 6 veranschaulicht ein der Fig. 3 entsprechendes Detail einer abgewandelten Ausführungsform,6 illustrates a detail corresponding to FIG. 3 of a modified embodiment,
  • Fig. 7 ist ein Schnitt nach Linie VII - VII in Fig. 6 undFig. 7 is a section along line VII - VII in Fig. 6 and
  • Fig. 8 veranschaulicht schematisch ein Detail einer noch anderen Bauart.8 schematically illustrates a detail of yet another type.

Von der als Ganzes mit 1 bezeichneten Bandgreifer-Webmaschine nach Fig. l sind nur das den Bringergreifer 2 tragende Eintragsband 3 und das den Nehmergreifer 4 tragende Eintragsband 5 dargestellt. Band 3 läuft in einer Führung 6, Band 4 in einer Führung 7. Die Bänder 3,5 bestehen beispielsweise aus kohlenfaserverstärktem Kunststoff, z.B. mit Kohlenfasergewebe versehenem Epoxyharz.Of the belt rapier weaving machine designated as a whole by 1 according to FIG. 1, only the entry belt 3 carrying the carrier rapier 2 and the entry belt 5 carrying the slave rapier 4 are shown. Band 3 runs in a guide 6, band 4 in a guide 7. The belts 3, 5 consist for example of carbon fiber reinforced plastic, e.g. epoxy resin coated with carbon fiber.

In der in Fig. l ausgezogen dargestellten Position befinden sich die Teile 2 - 5 ausserhalb des sich über die Webbreite 8 erstreckenden, von den Kettfäden 9,10 gebildeten Webfaches 11 (vgl. Fig. 2). An den beiderseitigen Rändern der Webbreite 8 sind in Fig. 1 jeweils einige Randkettfäden 12,13 angedeutet. Die Kettfäden 9,10 laufen während des Webbetriebes in Richtung der Pfeile 14.In the position shown in full line in FIG. 1, the parts 2 - 5 are located outside the shed 11, which extends over the weaving width 8 and is formed by the warp threads 9, 10 (cf. FIG. 2). A few edge warp threads 12, 13 are indicated in FIG. 1 on both sides of the weaving width 8. The warp threads 9, 10 run during the weaving operation in the direction of the arrows 14.

Das Fach wird von Schäften gebildet, von denen in Fig. 2 nur einer angedeutet und mit 15 bezeichnet ist. Durch seine Litzen 16 sind die in Fig. 2 im Oberfach befindlichen Kettfäden 9 sowie ein strichpunktiert angedeuteter, falsch gesteuerter Kettfaden 17 geführt. In Fig. 2 sind von der Bandgreifermaschine 1 ausserdem das Riet 18 und eine Kettfadenstütze 19 angedeutet. Das Riet bewegt sich gemäss Pfeil 21 hin und her.The compartment is formed by shafts, only one of which is indicated in FIG. 2 and designated by 15. The warp threads 9 located in the upper compartment in FIG. 2 as well as a wrongly controlled warp thread 17 indicated by the dot-dash line are guided through its strands 16. 2, the reed 18 and a warp support 19 are also indicated by the tape gripper machine 1. The reed moves back and forth according to arrow 21.

Die Führung 7 des Eintragsbandes 5 enthält eine am Webmaschinengestell angebrachte, Platte 22 und zwei darauf angeordnete, obere Führungsleisten 23,24.The guide 7 of the entry belt 5 contains a plate 22 attached to the weaving machine frame and two upper guide strips 23, 24 arranged thereon.

Ferner sind um 33,34 gemäss Pfeilen 35,36 schwenkbare, z.B. aus Tetrafluoräthylen (Marke TEFLON) bestehende Beschichtungsleisten 37,38 angeordnet. Sie stehen unter der Wirkung von Spiralfedern 41,42, die bestrebt sind, mit ihren abgewinkelten Enden 43,44 die Leisten 37,38 gemäss den Pfeilen 35,36 gegen das Eintragsband 5 zu drücken.Furthermore, 33.34 are pivotable according to arrows 35.36, e.g. Coating strips 37, 38 made of tetrafluoroethylene (brand TEFLON) are arranged. They are under the action of spiral springs 41, 42, which endeavor with their angled ends 43, 44 to press the strips 37, 38 against the entry band 5 according to the arrows 35, 36.

Je mehr die beiden auf dem Eintragsband 5 aufliegenden Abreibkanten 45,46 der Leisten 37,38 abgerieben bzw. abgenutzt werden, umso weiter gelangen die Federenden 43,44 in Schlitze 47,48, bis die Enden 43,44 schliesslich eine Endposition 43a,44a erreicht haben. Die Beschichtungsleisten 37,38 müssen dann ausgewechselt werden.The more the two abrading edges 45, 46 of the strips 37, 38 resting on the entry belt 5 are worn or worn, the further the spring ends 43, 44 enter slots 47, 48 until the ends 43, 44 finally have an end position 43a, 44a achieved. The coating strips 37, 38 must then be replaced.

Das Betriebsverfahren der Bandgreifermaschine 1 verläuft folgendermassen. Bei der in Fig. 1 strichpunktiert dargestellten Position 2b,3b,4b,5b der beiderseitigen Greifer 2,4 und Eintragsbänder 3,5 sind die Teile in der Faden- übergabestellung, in welcher der Schussfaden 30 gerade vom Bringergreifer 2 an den Nehmergreifer 4 übergeben wird. Darauf gelangen die Teile 2 - 5 in die in Fig. 1 ausgezogen dargestellten Stellungen ausserhalb von Webbreite 8 bzw. Fach 11. Darauf ist Fachwechsel. Die Schäfte wechseln sämtlich oder teilweise ihre neue Stellung. Zugleich gelangt das Riet aus einer hinteren, in Fig. 2 gestrichelt dargestellten Position 18b in die vordere, ausgezogen wiedergegebene Anschlagstellung 18, in der der Schussfaden 30 an das Gewebe 51 angeschlagen wird.The operating method of the belt gripper machine 1 proceeds as follows. In the position 2b, 3b, 4b, 5b of the grippers 2, 4 and entry belts 3, 5 shown in dash-dotted lines in FIG. 1, the parts are in the thread transfer position in which the weft thread 30 is currently being transferred from the gripper 2 to the gripper 4 becomes. The parts 2 - 5 then reach the positions shown in solid lines in FIG. 1 outside the weaving width 8 or compartment 11. There is a change of compartment. All or part of the shafts change their new position. At the same time, the reed moves from a rear position 18b, shown in broken lines in FIG. 2, into the front, drawn-out, stop position 18, in which the weft thread 30 is struck against the fabric 51.

Bevor die Schäfte, z.B. der Schaft 15 in der in Fig. 2 ausgezogen dargestellten, neuen, für den folgenden Schusseintrag bestimmten Extremstellung sind, werden die Eintragsorgane 3,5 mit den Greifern 2,4 wieder in das Fach 11 eingeschoben. Wenn z.B. ein in Fig. 1,2 strichpunktiert dargestellter, bisher in der Tieffachstellung 17a gewesener Kettfaden 17 infolge irgendeiner momentanen Störung, z.B. aufgrund der Reibung mehrerer, im gleichen Rohr (Schlitz) des Rietes 18 befindlicher Kettfäden, nicht sofort dem durch den zugehörigen Schaft 15 verursachten Schaftwechsel folgt, kann es vorkommen, dass der Nehmergreifer 4 bzw. das zugehörige Eintragsband 5 bereits in der in Fig. l gestrichelt angedeuteten, anfänglichen Einfahrposition 4a,5a sind. In ihr befindet sich der falsch gesteuerte Kettfaden 17 in der unterhalb des Bandes 5 verlaufenden Position 17a, so dass er bei der weiteren, in Fig. 1 nach rechts verlaufenden Bewegung der Teile 4,5 an dem für ihn bestimmten Fachwechsel aus der Tieffach- in die Hochfachstellung gehindert wird.Before the stems, e.g. the shaft 15 is in the new extreme position shown in FIG. 2 and intended for the following weft insertion, the insertion members 3, 5 with the grippers 2, 4 are pushed back into the compartment 11. If e.g. a warp thread 17, shown in dash-dot lines in FIG. Due to the friction of several warp threads located in the same tube (slot) of reed 18, the shaft change caused by the associated shaft 15 does not immediately follow, it can happen that the slave gripper 4 or the associated entry belt 5 is already in the position shown in FIG initial retracted position 4a, 5a indicated by dashed lines. In it, the incorrectly controlled warp thread 17 is in the position 17a running beneath the belt 5, so that during the further movement of the parts 4, 5 running to the right in FIG the high position is hindered.

Da das Band 5 jedoch während seiner Bewegung in das Fach 8,11 an seinen beiden Kanten 55,56 durch die beiden Beschichtungsleisten 37,38 mit in Fig. 3 gestrichelt angedeutetem Teflonabrieb 57,58 beschichtet wird, sind die Kanten 55,56 besonders geglättet. Dadurch wird vermieden, dass der unter besonderer Spannung befindliche Schussfaden 17 insbesondere an der Knickstelle 58 erhitzt werden und dadurch abgebrannt (getrennt) werden kann. Vielmehr kann der Betrieb -- wenn auch unter Inkaufnahme einer einmaligen, fälschlichen Kettfadenposition des Fadens 17 -- weitergehen. Wenn das Eintragsband 5 mit seinem Greifer 4 das Fach 11 wieder verlassen hat, kann der Faden 17 ungebrochen am weiteren Webbetrieb teilnehmen.However, since the band 5 is coated on its two edges 55, 56 by the two coating strips 37, 38 with Teflon abrasion 57, 58 indicated in FIG. 3 during its movement into the compartment 8, 11, the edges 55, 56 are particularly smoothed . This prevents the weft thread 17, which is under particular tension, from being heated, in particular at the kink 58, and thus being able to be burnt (separated). Rather, the operation can continue - even if a single, incorrect warp thread position of the thread 17 is accepted. When the entry belt 5 has left the compartment 11 with its gripper 4, the thread 17 can continue to participate in the further weaving operation.

Ein Stillstand der Webmaschine mit folgender Reparatur des Kettfadens 17 kann vermieden werden.A standstill of the weaving machine with the following repair of the warp thread 17 can be avoided.

Bei der abgewandelten Ausführungsform nach Fig. 6,7 sind in den die Führung 7 bildenden Teilen 22,26,27 Bohrungen 61,62 enthalten, in die aus TEFLON bestehende Beschichtungsstifte 63,64 eingeschoben sind. Diese stehen unter der Wirkung von mittels Schrauben 65 einstellbaren Druckfedern 66, von denen in Fig. 6,7 nur jeweils die obere dargestellt ist.In the modified embodiment according to FIG. 6.7, the parts 22, 26, 27 forming the guide 7 contain bores 61, 62 into which coating pins 63, 64 made of TEFLON are inserted. These are under the action of compression springs 66 which can be adjusted by means of screws 65, of which only the upper one is shown in FIGS. 6, 7.

Bei dem Ausführungsbeispiel nach Fig. 8 ist an einem Gestellteil 71 der Webmaschine 1 ein rohrförmiger Halter 72 befestigt, in den ein Beschichtungsstift 63 aus TEFLON eingeschoben ist. Sein unteres Ende ist mit einer Kerbe 74 versehen, durch welche nur die besonders kritische,dem Riet in der Position 18b und den Schäften 15 zugekehrte Kante 55 beschichtet wird. Der Beschichtungsstab 63 steht bei diesem Beispiel nur unter der Kraft seines Eigengewichtes.In the embodiment according to FIG. 8, a tubular holder 72 is fastened to a frame part 71 of the weaving machine 1, into which a coating pin 63 made of TEFLON is inserted. Its lower end is provided with a notch 74, through which only the particularly critical edge 55 facing the reed in position 18b and the shanks 15 is coated. In this example, the coating rod 63 is only under the force of its own weight.

Die Führung 6 für das den Bringergreifer 2 tragende Eintragsband 3 ist entsprechend Fig. 3 - 5 ausgebildet.The guide 6 for the feed belt 3 carrying the gripper 2 is designed in accordance with FIGS. 3-5.

Bei einer weiteren Ausführungsform des Verfahrens bzw. der Vorrichtung werden weitere Umfangsflächen 81,82 des Eintragsbandes 5 durch entsprechende Beschichtungselemente ausserhalb des Webfaches 8,11 beschichtet und das Band wird unter voller Beschichtung in das Fach während des Schusseintrages eingefahren. Gegebenenfalls können auch sämtliche Flächen 55,56,81,82 des Umfangsquerschnittes des Bandes 5 und/oder 3 beschichtet werden.In a further embodiment of the method or the device, further circumferential surfaces 81, 82 of the entry belt 5 are coated by appropriate coating elements outside the shed 8, 11 and the belt is inserted into the compartment with a full coating during the weft insertion. If necessary, all surfaces 55, 56, 81, 82 of the circumferential cross section of the band 5 and / or 3 can also be coated.

Bei einer anderen Ausführungsform enthält die Führung 7 an sämtlichen Führungsflächen eine aus TEFLON bestehende Beschichtungsschicht. Die Führung 7 kann auch gesamthaft aus TEFLON bestehen und selbst das Beschichtungselement für das Eintragsband bilden.In another embodiment, the guide 7 contains a TEFLON on all guide surfaces standing coating layer. The guide 7 can also consist entirely of TEFLON and itself form the coating element for the entry belt.

Claims (8)

1. Verfahren für den Betrieb einer Bandgreifer-Webmaschine (1) mit einem einen Fadengreifer (2,4) tragenden Schussfadeneintragsband (3,5), dadurch gekenn- zeichnet, dass das Eintragsband (3,5) vor seinem Eintritt in das Webfach (8,11) mindestens an einem Teil (55,56) seines Querschnittumfanges mit einem Glättungsstoff (57,58), vorzugsweise Kunststoff, beschichtet und dann beim Schusseintrag unter Beibehaltung dieser aufgebrachten Glättungsschicht (57,58) in das Webfach (8, 11) bewegt wird.1. A method for operating a belt gripper weaving machine (1) with a weft thread insertion belt (3,5) carrying a thread gripper (2,4), characterized in that the entry belt (3,5) before it enters the shed ( 8, 11) is coated on at least a part (55, 56) of its cross-sectional circumference with a smoothing material (57, 58), preferably plastic, and then when inserting the weft while maintaining this applied smoothing layer (57, 58) in the shed (8, 11) is moved. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Beschichtung (57,58) des Eintragsbandes (3,5) durch Abreiben eines berührend an ihm ausserhalb des Webfaches (8,11) angeordneten Abreibelementes (37,38, 63) erfolgt.2. The method according to claim 1, characterized in that the coating (57, 58) of the entry belt (3, 5) is carried out by rubbing a rubbing element (37, 38, 63) arranged on it outside of the shed (8, 11). 3. Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 oder 2, gekennzeichnet durch ein aus einem Abreibstoff, z.B. Kunststoff bestehendes, am Eintragsweg des Eintragsbandes (3,5) ausserhalb des Webfaches angeordnetes, in Berührung mit dem Eintragsband (3,5) stehendes Abreibelement (37,38,63).3. Apparatus for performing the method according to claims 1 or 2, characterized by a made of an abrasive, e.g. Plastic existing rubbing element (37, 38, 63) arranged on the entry path of the entry belt (3,5) outside the shed and in contact with the entry belt (3,5). 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Abreibelement (37,38,63) unter der Wirkung einer Feder (41,42,66) gegen das Eintragsband (3,5) gedrückt ist.4. The device according to claim 3, characterized in that the abrading element (37,38,63) under the action of a spring (41,42,66) is pressed against the entry belt (3,5). 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das Abreibelement (37,38) schwenkbar angeordnet ist.5. The device according to claim 4, characterized in that the abrading element (37,38) is pivotally arranged. 6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das Abreibelement (63) stangenförmig ausgebildet ist und unter der Wirkung einer Spiralfeder (41,42) steht.6. The device according to claim 4, characterized in that the abrading element (63) is rod-shaped and is under the action of a spiral spring (41,42). 7. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Abreibelement (63) stangenförmig ausgebildet ist und unter der Schwerkraft gegen das Eintragsorgan (3,5) gedrückt ist.7. The device according to claim 3, characterized in that the abrading element (63) is rod-shaped and is pressed under the force of gravity against the entry member (3,5). 8. Vorrichtung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass das Abreibelement (37,38,63) innerhalb der Führung (7) für das Eintragsband (3,5) angeordnet ist.8. Device according to one of claims 3 to 6, characterized in that the abrading element (37,38,63) is arranged within the guide (7) for the entry belt (3,5).
EP85810172A 1985-04-19 1985-04-19 Process for operating gripper looms, and device for applying the same Withdrawn EP0198145A1 (en)

Priority Applications (1)

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EP85810172A EP0198145A1 (en) 1985-04-19 1985-04-19 Process for operating gripper looms, and device for applying the same

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EP85810172A EP0198145A1 (en) 1985-04-19 1985-04-19 Process for operating gripper looms, and device for applying the same

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1394302A1 (en) * 2002-08-30 2004-03-03 Promatech S.p.A. Improvements in weft carrying grippers for weaving looms and in guiding means thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1131383A (en) * 1966-05-25 1968-10-23 Dewas Raymond Improvements in or relating to looms
GB1206124A (en) * 1967-09-26 1970-09-23 Somet Soc Mec Tessile Improvements in or relating to looms
FR2404063A1 (en) * 1977-09-27 1979-04-20 Dornier Gmbh Lindauer WEAVING MACHINE IN WHICH THE INTRODUCTION OF THE WEFT YARN RESULTS FROM THE ALTERNATE MOVEMENT OF ENTRY AND EXIT OF CARRIERS IN THE CROWD

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1131383A (en) * 1966-05-25 1968-10-23 Dewas Raymond Improvements in or relating to looms
GB1206124A (en) * 1967-09-26 1970-09-23 Somet Soc Mec Tessile Improvements in or relating to looms
FR2404063A1 (en) * 1977-09-27 1979-04-20 Dornier Gmbh Lindauer WEAVING MACHINE IN WHICH THE INTRODUCTION OF THE WEFT YARN RESULTS FROM THE ALTERNATE MOVEMENT OF ENTRY AND EXIT OF CARRIERS IN THE CROWD

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1394302A1 (en) * 2002-08-30 2004-03-03 Promatech S.p.A. Improvements in weft carrying grippers for weaving looms and in guiding means thereof
US6973942B2 (en) 2002-08-30 2005-12-13 Promatech S.P.A. Weft carrying grippers for weaving looms and in guiding means thereof

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