EP0468916B1 - Métier à tisser à griffes avec lamelles de guidage des griffes - Google Patents

Métier à tisser à griffes avec lamelles de guidage des griffes Download PDF

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Publication number
EP0468916B1
EP0468916B1 EP91810502A EP91810502A EP0468916B1 EP 0468916 B1 EP0468916 B1 EP 0468916B1 EP 91810502 A EP91810502 A EP 91810502A EP 91810502 A EP91810502 A EP 91810502A EP 0468916 B1 EP0468916 B1 EP 0468916B1
Authority
EP
European Patent Office
Prior art keywords
gripper
guide teeth
runner
weaving machine
machine according
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
Application number
EP91810502A
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German (de)
English (en)
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EP0468916A1 (fr
Inventor
Ursula Rheinganz
Remo D'incau
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.)
Itema Switzerland Ltd
Original Assignee
Sultex AG
Maschinenfabrik Rueti AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sultex AG, Maschinenfabrik Rueti AG filed Critical Sultex AG
Publication of EP0468916A1 publication Critical patent/EP0468916A1/fr
Application granted granted Critical
Publication of EP0468916B1 publication Critical patent/EP0468916B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands

Definitions

  • the invention relates to a rapier weaving machine according to the preamble of claim 1.
  • rapier weaving machines which are in widespread use today, the weft thread is inserted by a rapier and a rapier rapier, whereby a precise transfer of the thread in the middle area of the shed must be ensured.
  • guide teeth With the help of guide teeth, a reliable transfer of the weft thread can be achieved, especially with wide weaving machines.
  • Various forms of guide teeth are already known (see e.g. DE-AS-1 279 565).
  • the disadvantage of the known guide teeth is that the entry belts are guided and that their edges are damaged by the grazing contact.
  • the friction stress exposes fibers that have a very abrasive effect. Damaged entry belts are the cause of many warp thread breaks.
  • a weaving machine with rapiers in which the rapier is guided by guide teeth and the reed.
  • the guide part of the gripper is arranged on the side of the gripper head.
  • the weft insertion element which is, for example, a looper band
  • a gripper head which is wider than the entry belt.
  • Guide elements engage on the edges of the gripper head. The guide elements are arranged with respect to the band in such a way that there can also be no contact between the band and the guide elements.
  • Guide teeth can also be advantageous in weaving machines if the weft is inserted only on one side with a rapier and the pick-up is carried out outside the shed using a stationary device.
  • the guide teeth 20 and 21 in FIG. 1 are fastened to the sley 1 with a fastening element 30. Such guide teeth are attached over the entire width of the sley 1.
  • 2 shows how the gripper runner 10 within the shed, which is formed by the upper warp threads 7a and the lower warp threads 7b, is supported on the one hand by the guide tooth 20 against the reed 2 and on the other hand by the guide tooth 21 in the direction of tissue support 5 or tissue 8.
  • the guide teeth can be arranged uniformly at constant intervals, the two guide teeth 20 and 21 preferably occurring alternately.
  • rapier weaving machines in which the weft thread is transferred from the rapier to the holster rapier, it is advantageous to guide the guide teeth more frequently, i.e. with smaller distances to arrange; because the position of the grippers is to be brought under very particular control there.
  • FIG 2 a cross section through a bringer gripper head 3 is schematically shown, which is attached to the top of the entry belt 4.
  • the internal components of the gripper head e.g. the thread clamp are indicated with the box 3a.
  • the entry belt 4 is at a greater distance from the lower warp threads 7b and is not directly above them, as is the case in the shed (chain-dotted warp threads 7a ', 7b') in previous rapier weaving machines - without guided grippers .
  • the guide teeth 20, 21, a warp thread support 6 ' is not necessary, as a result of which the shed geometry can be improved by making the angle f larger than the corresponding angle f' in previous weaving machines.
  • the guide teeth 20, 21 pass between the warp threads 7b of the lower shed.
  • the guide teeth must be suitably shaped so that there are no problems such as warp thread breaks or the warp threads getting stuck.
  • the edges that come into contact with the warp threads must be rounded or beveled.
  • the tips of the guide teeth which can come into grazing contact behind the gripper runner with the flexible, somewhat sagging entry belt, must be shaped in such a way that the sensitive belt edges remain unaffected, so that any contact that occurs is somewhat offset to the inside of the belt.
  • the length of the gripper skids 10 in the belt direction does not have to match the length of the gripper head. It is advantageous if the runner 10 is longer, so that always several guide teeth 20, 21 are in contact with it.
  • the runner 10 should be as long as possible, namely as long as the space between the driving belt wheel and the sley allow.
  • a long runner means a welcome stiffening of the entry band behind the Gripper head. So that the gripper does not become too massive due to a long runner, it can be designed as a hollow body.
  • the mass of the runner 10 is advantageously chosen such that the common center of gravity with respect to the gripper head 3 and runner 10 comes to lie below the belt level. With the low center of gravity, it is avoided that, as is known for the previous rapier weaving machines, the rapier head is lifted off the sliding support.
  • the guide teeth which are subject to constant frictional stress from the warp threads, must be made of a resistant material, preferably an abrasion-resistant metal alloy. So that no wear occurs on the guide teeth due to the sliding movement of the gripper runner 10, the runner 10 should be made of a softer material, e.g. made of a plastic.
  • the cross-sectional profile of the gripper runner 10 can be convex, as is the case in FIG. 2. Another example is shown in FIG. 3, where the guidance takes place only on the flanks of the runner 10.
  • the elongated shape of the guide teeth 20, 21 is well suited for a low-resistance penetration into the shed.
  • FIG. 3 as well as in the following figures, only the entry belts 4 are shown in addition to the runner 10; the gripper heads are omitted. 4 shows an embodiment in which the sliding surfaces of the guide teeth 20, 21 are crescent-shaped.
  • the complementary shape of the skid profile makes it impossible - in the event that the center of gravity lies above the belt level - to lift the gripper off the sliding support.
  • Another possibility of suppressing the lifting of the gripper is also as follows: permanent magnets are inserted into the gripper runner 10.
  • the guide teeth 20 are made entirely or partially of a ferromagnetic material. This magnetic lift-off protection is advantageously carried out with the embodiment of FIG. because there it is easy to set up a small distance between the magnets 10 and the guide teeth 20 inserted centrally in the runner.
  • FIGS. 5a to 5c show cross sections through gripper runners 10 which have a longitudinal groove in the underside.
  • the longitudinal groove in Fig.5a widens towards the bottom.
  • the guide teeth 20 engaging in the longitudinal groove can all be of the same design. This also applies to the dovetail-shaped longitudinal groove in FIG. 5b.
  • unequal guide teeth 20, 21 can also be used in this case, as shown in FIG. 5c.
  • the longitudinal groove of the gripper runner 10 can of course also have a rectangular one.
  • Guiding outside the shed can be done using a rail several centimeters long.
  • 6 shows the cross-sectional profile of such a guide rail 25 with a corresponding cross-sectional profile of the gripper runner 10 as an exemplary embodiment.
  • the guiding within the shed can be carried out by teeth 20 as shown in FIG. 5a (shown in broken lines). With a skid profile as in FIG. 4, it is of course also possible that the same sliding surfaces are used for the guide rail 25 as well as for the guide teeth 20, 21.

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

Claims (12)

  1. Métier à tisser à griffes avec au moins une bande d'insertion (4) pour le déplacement d'une tête de griffe (3) et avec des dents de guidage (20, 21), placées sous la ou sous chaque tête de griffe (3), qui sont prévues en tant que support de glissement unique pour la griffe, caractérisé en ce que la ou chaque griffe est équipée d'un patin (10) placé sous la tête de griffe (3) et en ce qu'en raison d'une forme appropriée du patin (10) ainsi que des dents de guidage (20, 21), le profil de section transversale du patin (10) s'applique au moins en partie par concordance de forme contre la surface de glissement des dents de guidage (20, 21) et il existe, entre les dents de guidage (20, 21) et les bords de la bande d'insertion (4), une distance de séparation qui est maintenue, même lors d'un contact se produisant dans tous les cas, entre les bords supérieurs des dents de guidage (20, 21) et la bande d'insertion (4), lorsque la bande d'insertion (4) fléchit.
  2. Métier à tisser à griffes selon la revendication 1 avec profil de patin convexe.
  3. Métier à tisser à griffes selon la revendication 1 ou 2 avec surfaces de glissement en forme de croissant des dents de guidage (20, 21), qui empêchent que la griffe ne se soulève du support de glissement.
  4. Métier à tisser à griffes selon l'une des revendications 1 à 3 avec dents de guidage (20, 21) inégales, certaines des dents de guidage (20) soutenant le patin de griffe (10) côté peigne et les autres (21) côté tissu.
  5. Métier à tisser à griffes selon la revendication 1 avec une rainure longitudinale dans la face inférieure du patin de griffe (10) dans laquelle s'engagent les dents de guidage (20) .
  6. Métier à tisser à griffes selon la revendication 5 avec dents de guidage (20), qui s'engagent en queue d'aronde dans la rainure longitudinale du patin de griffe (10).
  7. Métier à tisser à griffes selon l'une des revendications 1 à 6 avec rail de guidage (25), qui se trouve à l'extérieur de la foule et qui guide à cet endroit le patin de griffe (10), aucun contact n'existant entre les bords de la bande d'insertion (4) et le rail de guidage (25).
  8. Métier à tisser à griffes selon l'une des revendications 1 à 7 avec dents de guidage ferromagnétiques et aimants permanents dans le patin de griffe (10).
  9. Métier à tisser à griffes selon l'une des revendications 1 à 8 avec bandes d'insertion pour une griffe d'amenée et une griffe de prélèvement.
  10. Métier à tisser à griffes selon la revendication 9 avec une disposition des dents de guidage (20, 21) qui, dans la zone centrale de la foule, présente une distribution plus dense que sur le bord.
  11. Métier à tisser à griffes selon l'une des revendications 1 à 10 avec dents de guidage (20, 21), qui sont réalisées dans un matériau plus résistant à l'usure que les patins de griffe (10).
  12. Métier à tisser à griffes selon la revendication 11 avec des dents de guidage (20, 21) métalliques et des patins de griffe (10) en matière plastique.
EP91810502A 1990-07-24 1991-06-26 Métier à tisser à griffes avec lamelles de guidage des griffes Expired - Lifetime EP0468916B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH244790 1990-07-24
CH2447/90 1990-07-24

Publications (2)

Publication Number Publication Date
EP0468916A1 EP0468916A1 (fr) 1992-01-29
EP0468916B1 true EP0468916B1 (fr) 1996-01-03

Family

ID=4234041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810502A Expired - Lifetime EP0468916B1 (fr) 1990-07-24 1991-06-26 Métier à tisser à griffes avec lamelles de guidage des griffes

Country Status (3)

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US (1) US5176185A (fr)
EP (1) EP0468916B1 (fr)
DE (1) DE59107193D1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557723B1 (fr) * 1992-02-28 1997-05-21 Lindauer Dornier Gesellschaft M.B.H Dispositif de guidage de bandes ou de lances d'insertion pour métiers à tisser
DE59207009D1 (de) * 1992-06-12 1996-10-02 Rueti Ag Maschf Greiferwebmaschine
IT1270144B (it) * 1994-05-27 1997-04-29 Nuovo Pignone Spa Sistema perfezionato di guida del nastro di inserzione della pinza in un telaio tessile senza navetta
DE9413172U1 (de) * 1994-08-16 1994-10-13 Textilma Ag, Hergiswil Greiferwebmaschine
IT1271130B (it) * 1994-11-30 1997-05-26 Vamatex Nuova Spa Mezzi per guidare il moto di una coppia di pinze all'interno del passo di telai di tessitura
GB2314095B (en) * 1996-06-14 2000-05-17 Griffith Textile Mach Ltd Gripper type loom
BE1010943A3 (nl) * 1997-02-24 1999-03-02 Picanol Nv Grijperweefmachine met een aantal geleidingsmiddelen.
JP4595187B2 (ja) * 2000-10-12 2010-12-08 株式会社豊田自動織機 レピア織機における緯入れ装置
ATE365241T1 (de) * 2002-08-30 2007-07-15 Promatech Spa Verbesserungen an schussfadengreifern für webmaschinen und an webmaschinen mit führungsmitteln dafür
DE10346225A1 (de) * 2003-09-23 2005-05-19 Picanol N.V. Führungselement für ein Greiferband
DE10346224A1 (de) * 2003-09-23 2005-04-14 Picanol N.V. Greiferband für eine Greiferwebmaschine
US20090293983A1 (en) 2008-05-28 2009-12-03 Itema (Switzerland) Ltd. Apparatus And Method For The Insertion Of A Weft Thread In A Rapier Weaving Machine
BE1028436B1 (nl) * 2020-06-25 2022-01-31 Vandewiele Nv Geleidingsinrichting in een grijperweefmachine, grijperweefmachine en werkwijze voor het omvormen van een grijperweefmachine

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR48801E (fr) * 1936-11-21 1938-07-12 Perfectionnements aux métiers à tisser à aiguilles
ES311799A1 (es) * 1965-04-06 1965-07-01 Desveus Duran Magin Un perfeccionamiento en los dispositivos para tramas de los telares
ES400984A1 (es) * 1972-03-04 1975-02-01 Desveus Duran Perfeccionamientos en la construccion de maquinas de tejer sin lanzadera.
CH592760A5 (fr) * 1975-10-01 1977-11-15 Rueti Ag Maschf
JPS6011134B2 (ja) * 1979-05-02 1985-03-23 株式会社豊田中央研究所 フレキシブルタイプレピア織機
DD225863A3 (de) * 1983-09-27 1985-08-07 Textimaforschung Malimo Veb Schussfadeneintragsvorrichtung
IT1171737B (it) * 1983-10-10 1987-06-10 Vamatex Spa Gancio per la guida di nastri portapinze all'interno del passo di telai di tessitura e complesso di guida con esso realizzabile
EP0199881B1 (fr) * 1985-05-03 1988-01-20 GebràœDer Sulzer Aktiengesellschaft Dispositif d'insertion de trame pour les métiers à tisser à navette à pince
DE3519685C1 (de) * 1985-06-01 1986-08-28 Lindauer Dornier Gmbh, 8990 Lindau Befestigungsvorrichtung fuer an einem Traegerteil auswechselbar angeordnete Fuehrungskoerper an schuetzenlosen Webmaschinen
IT1184559B (it) * 1985-06-04 1987-10-28 Vamatex Spa Mezzi per guidare le pinze porta-trama ed i nastri che le comandano all'interno del passo di telai di tessitura a pinze
IT1198246B (it) * 1986-12-23 1988-12-21 Vamatex Spa Mezzi per guidare il moto di una coppia di pinze portatrama all'interno del passo di telai di tessitura
WO1988007600A1 (fr) * 1987-04-03 1988-10-06 Textilma Ag Metier a tisser a pince
IT1227335B (it) * 1988-09-08 1991-04-08 Vamatex Spa Mezzi per guidare il moto di pinze di alimentazione della trama all'interno del passo di telai di tessitura senza navette

Also Published As

Publication number Publication date
DE59107193D1 (de) 1996-02-15
US5176185A (en) 1993-01-05
EP0468916A1 (fr) 1992-01-29

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