EP0446561A1 - Métier à tisser à pinces avec bandes d'insertion et éléments d'écartement pour les pinces - Google Patents

Métier à tisser à pinces avec bandes d'insertion et éléments d'écartement pour les pinces Download PDF

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Publication number
EP0446561A1
EP0446561A1 EP90810998A EP90810998A EP0446561A1 EP 0446561 A1 EP0446561 A1 EP 0446561A1 EP 90810998 A EP90810998 A EP 90810998A EP 90810998 A EP90810998 A EP 90810998A EP 0446561 A1 EP0446561 A1 EP 0446561A1
Authority
EP
European Patent Office
Prior art keywords
rapier
weaving machine
machine according
teeth
rapier weaving
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.)
Granted
Application number
EP90810998A
Other languages
German (de)
English (en)
Other versions
EP0446561B1 (fr
Inventor
Angelo Stacher
Rudolf Vogel
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
Sulzer AG
Sultex AG
Gebrueder Sulzer 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 Sulzer AG, Sultex AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0446561A1 publication Critical patent/EP0446561A1/fr
Application granted granted Critical
Publication of EP0446561B1 publication Critical patent/EP0446561B1/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
    • D03D47/12—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 frictional stress on the warp threads with yarn damage.
  • 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 spacing teeth which are attached to the sley and which ensure the distance between the warp threads.
  • the spacer teeth have similarities to guide teeth, as are known for example from DE-OS 2439802. However, there is 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.
  • Today's rapier weaving machines in which the tapes slide on the warp threads of the lower shed, can easily be converted to implement one of the two or the combination of the two solutions according to the invention.
  • the sub-compartment must refer 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 that 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 also supported in addition to the gripper heads.
  • the warp thread support can be dispensed with, which in the conventional rapier weaving machines must necessarily be arranged between the reed and the shafts 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 stuck together due to the fibers protruding from the yarn.
  • the 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 due to damaged entry belts very quickly leads to warp thread breaks.
  • 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 height positions 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 are located on the underside of the gripper heads 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 drawn in 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.
  • Figure 4 shows a cross section through the same arrangement, but with some additional information. The following is also indicated: a Section through the Bringer 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 '.
  • the distance a is the distance by which the lower compartment in the arrangement according to the invention is shifted downward 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP90810998A 1990-03-13 1990-12-18 Métier à tisser à pinces avec bandes d'insertion et éléments d'écartement pour les pinces Expired - Lifetime EP0446561B1 (fr)

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 true EP0446561A1 (fr) 1991-09-18
EP0446561B1 EP0446561B1 (fr) 1997-09-10

Family

ID=4195477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810998A Expired - Lifetime EP0446561B1 (fr) 1990-03-13 1990-12-18 Métier à tisser à pinces avec bandes d'insertion et éléments d'écartement pour les pinces

Country Status (4)

Country Link
US (2) US5135033A (fr)
EP (1) EP0446561B1 (fr)
JP (1) JPH05209341A (fr)
DE (1) DE59010760D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573727A1 (fr) * 1992-06-12 1993-12-15 Sulzer RàœTi Ag Métier à tisser à pinces
EP0684328A1 (fr) * 1994-05-27 1995-11-29 NUOVO PIGNONE S.p.A. Système de guidage amélioré pour la bande d'insertion dans un métier à tisser à pinces

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2116181B1 (es) * 1994-12-05 1999-03-01 Autotex S A Procedimiento de fabricacion de un tejido industrial de baja permeabilidad al aire y maquina correspondiente.
IT1290837B1 (it) * 1996-02-27 1998-12-14 Nuovo Pignone Spa Testa di nastro perfezionata per telaio tessile a pinze e procedimento per la sua realizzazione
US6672790B2 (en) * 2002-03-01 2004-01-06 George W. Davis Spliced elongate member and method
FR2866032B1 (fr) * 2004-02-09 2006-05-05 Ltaief Bouaziz Dispositif pour machine textile et de tissage de guidage de lances et projectiles d'insertion et utilisation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842869A (en) * 1973-10-09 1974-10-22 Rockwell International Corp Tapeguide raceway for rapier loom
DE2902729B1 (de) * 1979-01-25 1980-02-21 Dornier Gmbh Lindauer Schussfadeneintragorgan fuer schuetzenlose Webmaschinen
FR2552455A1 (fr) * 1983-09-27 1985-03-29 Textima Veb K Dispositif d'insertion du fil de trame
DE3519685C1 (de) * 1985-06-01 1986-08-28 Lindauer Dornier Gmbh, 8990 Lindau Befestigungsvorrichtung fuer an einem Traegerteil auswechselbar angeordnete Fuehrungskoerper an schuetzenlosen Webmaschinen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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 (fr) * 1957-09-24 1900-01-01
BE658330A (fr) * 1964-01-17 1900-01-01
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
EP0199880A1 (fr) * 1985-05-03 1986-11-05 GebràœDer Sulzer Aktiengesellschaft Dispositif d'insertion de trame pour métier à tisser, plus particulièrement un métier à tisser à navette à griffe
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
DE4000686A1 (de) * 1990-01-12 1991-07-18 Dornier Gmbh Lindauer Steg-ladensohle fuer eine greifer-webmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842869A (en) * 1973-10-09 1974-10-22 Rockwell International Corp Tapeguide raceway for rapier loom
DE2902729B1 (de) * 1979-01-25 1980-02-21 Dornier Gmbh Lindauer Schussfadeneintragorgan fuer schuetzenlose Webmaschinen
FR2552455A1 (fr) * 1983-09-27 1985-03-29 Textima Veb K Dispositif d'insertion du fil de trame
DE3519685C1 (de) * 1985-06-01 1986-08-28 Lindauer Dornier Gmbh, 8990 Lindau Befestigungsvorrichtung fuer an einem Traegerteil auswechselbar angeordnete Fuehrungskoerper an schuetzenlosen Webmaschinen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573727A1 (fr) * 1992-06-12 1993-12-15 Sulzer RàœTi Ag Métier à tisser à pinces
US5345977A (en) * 1992-06-12 1994-09-13 Sulzer Rueti Ag Gripper loom having warp thread bearer members
EP0684328A1 (fr) * 1994-05-27 1995-11-29 NUOVO PIGNONE S.p.A. Système de guidage amélioré pour la bande d'insertion dans un métier à tisser à pinces
US5615714A (en) * 1994-05-27 1997-04-01 Nuovo Pignone S.P.A. Guide system for the gripper insertion tape in a shuttleless loom
CN1040783C (zh) * 1994-05-27 1998-11-18 新齿轮股份公司 在无梭织机中用于夹纬器引入带的改进的导向系统

Also Published As

Publication number Publication date
USRE35400E (en) 1996-12-17
US5135033A (en) 1992-08-04
DE59010760D1 (de) 1997-10-16
EP0446561B1 (fr) 1997-09-10
JPH05209341A (ja) 1993-08-20

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