EP0438973B1 - Appareil à former les lisières pour métier à tisser - Google Patents

Appareil à former les lisières pour métier à tisser Download PDF

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Publication number
EP0438973B1
EP0438973B1 EP90810930A EP90810930A EP0438973B1 EP 0438973 B1 EP0438973 B1 EP 0438973B1 EP 90810930 A EP90810930 A EP 90810930A EP 90810930 A EP90810930 A EP 90810930A EP 0438973 B1 EP0438973 B1 EP 0438973B1
Authority
EP
European Patent Office
Prior art keywords
needle
shaft
retaining arm
drive shaft
tuck
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
EP90810930A
Other languages
German (de)
English (en)
Other versions
EP0438973A1 (fr
Inventor
Gotthilf Bertsch
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 EP0438973A1 publication Critical patent/EP0438973A1/fr
Application granted granted Critical
Publication of EP0438973B1 publication Critical patent/EP0438973B1/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
    • D03D47/40—Forming selvedges
    • D03D47/48—Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing

Definitions

  • the invention relates to a pneumatic last laying device of a weaving machine with a threading nozzle for temporarily holding the weft thread end protruding from the shed of the weaving machine and for the subsequent transfer to a laying needle of the last laying device.
  • the carrier of the threading nozzle is provided with a drive for a back and forth movement with respect to the shed. Furthermore, a weft scissors must be provided with a special drive to cut the weft. The last laying needle pivots against the threading nozzle and also requires a drive. In order to generate the various, partly translatory movements of the parts mentioned, relatively complex and space-consuming measures on the weaving machine are necessary.
  • a pneumatic thread holder for temporarily holding a weft thread end is known from EP 0 349 039-A1, which is used in pneumatic strip laying devices.
  • An inserted weft thread is held pneumatically by the thread holder, a hook-shaped laying needle between the warp threads of the open shed swung in, and then the thread holder with a three-dimensional cam track is guided around the end region of the laying needle such that the end region of the weft thread comes to rest in the hook of the laying needle and is thereby held by the latter.
  • a mechanical last laying device is known, with a cutting and holding device, which holds a weft firmly in one place after the cutting process, so that the laying needle grasps the held weft with its pick-up hook via a three-dimensional curved path.
  • the disadvantages of this known last laying device can be seen in the fact that the drive of the laying needle, which has to perform both rotational and translational movements, requires relatively complex and space-consuming devices on the weaving machine. Two different cams and a large number of levers are required to drive the laying needle.
  • Another disadvantage is that the strip laying device requires two cutting blades which act simultaneously and which act on one another, both driven separately by cam disks and levers. This drive is also relatively complex.
  • the invention has for its object to provide a compact strip laying device using a pneumatically operated threading nozzle, in which drive elements which are as simple as possible and have little moving mass allow an inexpensive solution.
  • a holding arm for the threading nozzle is pivotally mounted in a housing above the fabric at the stop edge for the weft thread, the drive shaft for the holding arm being essentially parallel to the weft insertion direction, and that a drive shaft for the laying needle is mounted perpendicular to the shaft of the holding arm in the same housing.
  • the roller lever for the laying needle has an extended lever arm with a toothed segment which meshes with a bevel gear on the drive shaft for the laying needle.
  • the pivot axis for the holding arm lies above the reed and above the attachment point of the reed on the fabric.
  • the holding arm for the threading nozzle can also carry scissors.
  • a lower scissor blade of the scissors is fixedly connected to the holding arm, while an upper scissor blade is pivotally mounted on it and can be actuated by means of a handlebar, one end of which is attached to the scissor blade and the other end of which has a joint in the housing. This eliminates the need for an additional drive and an additional holder for the scissors.
  • the strip laying device can be used for the weft side and for the catching side of the weaving machine as well Separating strip laying device can be arranged between the weft and catch side of the weaving machine.
  • a common drive shaft 11 with cams 11a, 11b is mounted parallel to a second shaft 13.
  • a roller lever 130a for the holding arm 15 carries rollers 130c, 130d which scan the circumference of the cams 11a, 11b.
  • the holding arm 15 is rotatably fixed, which carries a bearing point 22 for the upper scissor blade 20a of a pair of scissors 20 in the lower part.
  • the lower scissor blade 20b of the scissors 20 is fixedly attached to the nozzle holder 16.
  • a scissor arm 21 on the upper scissor blade 20a has a joint 18b at the left end which connects a link 19 to the scissor arm 21.
  • the other end of the link 19 is mounted in the housing 10 by means of a joint 18a. Furthermore, there is a drive shaft in the housing 10 14 with an associated bevel gear 140, which is driven by a toothed segment 132 of a lever arm 131.
  • the drive shaft 14 serves to drive the laying needle. As can be seen from FIG. 1a, the shaft 13 lies almost exactly above the intersection of the warp threads 51 and 52 through which the stop edge 53 for the weft thread according to FIG. 1b runs.
  • the fabric 50 extends horizontally to the left of the stop edge 53.
  • the holding arm 15 with the nozzle carrier 16 is located in each case next to a fabric edge, that is to say on the weft side or on the catching side of the weaving machine next to the fabric or, in the case of a plurality of fabric webs, in each case between the webs.
  • 1a to 1c the reed of an air jet loom is also shown.
  • the lamellae of the reed have openings 40a.
  • the holding arm 15 performs a pivoting movement about the center of the shaft 13 in a counterclockwise direction from the dashed position 15 'into the extended position 15, the joint 18b comes to a higher position relative to the bearing point 22, whereby the scissor blades 20a and 20b moved against each other and thus the scissors 20 is closed.
  • the cutting process of the scissors 20 will be discussed in the following.
  • the drive shaft 14 forms an acute angle with the plane of the fabric 50, the drive shaft 14 rising as viewed from the fabric 50 to the reed 40.
  • Fig. 1b the holding arm 15 is shown without scissors 20.
  • the nozzle carrier 16 carries one above the other an upper threading nozzle 16a and a lower threading nozzle 16b, which are connected to pipes 17a, 17b. Compressed air or suction air can optionally be introduced through the pipes 17a, 17b. This leads to a weft thread end 54b according to FIG. 3b after cutting off the weft thread tip 55 either into the upper threading nozzle 16a or into the lower threading nozzle 16b according to FIG. 1b, depending on which of the two threading nozzles 16a, 16b compressed or suction air flows.
  • the weft end 54b is blown by means of suction air from the threading nozzle 16a into the lower threading nozzle 16b, in which air is sucked in through the tube 17b.
  • the weft end 54b will find its way into the lower threading tube 16b when the nozzle carrier 16 has been brought over the weft thread 54.
  • compressed air is fed into the tube 17b, whereupon the weft thread end 54b is blown through the hole of the laying needle 152 into the threading nozzle 16a.
  • the latter is under pressure, since air is drawn off through the upper tube 17a.
  • the threading nozzles 16a, 16b can, as can be seen from FIG. 1b, be pivoted from a left position of the holding arm 15 'into a right position, shown in solid lines in FIG. 1b.
  • the pivoting back of the holding arm 15 with the nozzle carrier 16 in the dash-dotted position 15 ' is necessary if the reed 40 is pivoted to the left according to arrow 40' up to the stop edge 53 for the reed.
  • 1c shows the drive of the laying needle 142 in the housing 10.
  • the cams 11c and 11d on the common drive shaft 11 pivot the roller lever 130b, which is mounted on the shaft 13 by means of a roller bearing.
  • the lever arm 131 displaces the toothed segment 132 with respect to the bevel gear 140, as a result of which the drive shaft 14 and with it the laying arm 141 and the laying needle 142 are pivoted.
  • the pivoting of the laying needle is explained in more detail below.
  • the roles 130e and 130f on the roller lever 130b are in contact with the cams 11c and 11d on the drive shaft 11.
  • FIG. 2a is the laying needle 142 in the nozzle holder 16 during the transfer of a weft end, not shown, from the nozzle holder 16 to the laying needle 142.
  • the dot-dash position 142 'of the laying needle 142 is the uppermost position of the laying needle 142 outside the shed.
  • the upper and lower scissor blades 20a and 20b and the handlebar 19 with the joints 18a and 18b can be seen.
  • a gearwheel 12a is seated on the invisible common drive shaft 11 of the strip laying device 1.
  • the gearwheel 12a can be driven by a further continuous shaft.
  • the embodiment according to FIG. 2b differs from that in FIG. 2a in that the laying needle 142 including the drive is designed twice.
  • the nozzle holder 16 is also provided twice. In between there is a pair of scissors 20.
  • This embodiment of the strip laying device 1 is used when a plurality of fabric webs are woven parallel to one another on a weaving machine.
  • the embodiment according to FIG. 2c of the strip laying device 1 has only one nozzle holder 16 and the laying needle 142 with the associated drives. It is assumed here that separate scissors are provided for cutting off the weft thread tip before inserting the weft thread end 54b by means of the laying needle 142.
  • a further gear wheel 12b or 12c is provided on the strip laying device.
  • FIGS. 3a to 3c the position of the strip-laying elements relative to the warp threads 51, 52 and to the fabric 50 can be seen in the plan. 3a, the reed 40 has just struck a weft thread 54 on the edge of the fabric 50 and is on the way to the entry position according to arrow 40 ⁇ .
  • the laying needle 142 dips in an arc around the drive shaft 14 according to FIG. 2a between the warp threads 51, 52, the hole 142a at the tip of the laying needle 142 approaching the nozzle carrier 16, which is moved according to arrow 16 ', since it this had to make room for the previous attack of the weft thread 54 by the reed 40.
  • the scissors 20 are also displaced or pivoted in the direction of the weft thread end 54b.
  • the weft thread tip 55 is held by a thread clamp 63, into which the weft thread 54 has been inserted by means of the reed 40 and a drawing nozzle 61.
  • the weft thread tip was previously in the stretching nozzle 61, through which ambient air was sucked in.
  • the weft thread tip 55 is located in FIG. 3a in a suction tube 62 before being cut off by means of the scissors 20.
  • FIG. 3b shows the entry end for the weft thread 54a, which was inserted according to arrow 56 along the reed 40 to the stretching nozzle 61.
  • the scissors 20 is closed in the position shown, whereby the weft tip 55 has been cut off and is pulled through the suction tube 62 in the direction of arrow 62 '.
  • the weft thread end 54b is first blown into one of the threading nozzles 16a, 16b as described above and then blown into the hole 142a of the laying needle 142.
  • the laying needle moves back between the warp threads 51 and 52 according to arrow 143, whereupon the weft end in position 54b 'next to the Weft thread 54 comes to rest.
  • the weft thread end 54b is secured in its inserted position by the next inserted weft thread 54a after it has struck by means of the reed 40.
  • FIG. 3c shows the weft stop of the next inserted weft thread 54a.
  • the reed touches the upper edge of the fabric 50.
  • the nozzle holder 16 and with it the scissors 20 are at a safe distance from the striking reed 40 in a position which is shown in Fig. 1a with the dash-dotted position 15 '.
  • the weft tip 55 is transported through the suction tube 62 in the direction of arrow 62 '.
  • the nozzle holder 16 and the scissors 20 can be moved in the direction of the last inserted weft thread 54a in order to detect the end of this weft thread 54a.

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

Claims (8)

  1. Dispositif pneumatique de formation de lisière (1) d'une machine à tisser, comprenant une buse d'enfilement (16a, 16b) destinée à retenir momentanément l'extrémité (54b) du fil de trame qui ressort de la foule de la machine à tisser, ainsi qu'à transmettre ensuite par voie exclusivement pneumatique le fil de trame (54b) à une aiguille d'insertion (142) du dispositif de formation de lisière (1), la buse d'enfilement (16a, 16b) étant fixée à un bras de support (15), caractérisé en ce que le bras de support (15) est monté oscillant au moyen d'un arbre (13) dans un boîtier (10) qui est positionné au-dessus du tissu (50) à proximité du bord (53) de rabattement du fil de trame (54), l'arbre (13) du bras de support (15) étant sensiblement parallèle au bord de rabattement (53) et en ce qu'un arbre (14) de commande de l'aiguille d'insertion (142) est monté dans le même boîtier (10) transversalement à l'arbre (13) du bras de support (15).
  2. Dispositif selon la revendication 1, caractérisé en ce que les mouvements de l'aiguille d'insertion (142) et du bras de support (15) sont transmis de la commande principale de la machine à tisser au moyen d'un arbre commun de commande (11) qui est situé dans le boîtier (10) parallèlement au bord de rabattement (53).
  3. Dispositif selon les revendications 1 et 2, caractérisé en ce que l'arbre commun de commande (11) supporte des cames (11a, b, c, d) auxquelles sont affectés des leviers à galet (130a, 130b) de transmission des mouvements à l'arbre (13) du bras de support (15) et à l'arbre (14) de commande de l'aiguille d'insertion (142).
  4. Dispositif selon la revendication 3, caractérisé en ce que le levier à galet (130b) de l'aiguille d'insertion (142) comprend un prolongement de bras de levier (131) équipé d'un segment denté (132) qui engrène avec un pignon conique (140) calé sur l'arbre (14) de commande de l'aiguille d'insertion (142).
  5. Dispositif selon la revendication 1, caractérisé en ce que l'arbre (13) du bras de support (15) est placé au-dessus du peigne (40) et au-dessus du bord de rabattement (53) du peigne (40) contre le tissu (50).
  6. Dispositif selon la revendication 1, caractérisé en ce que le bras (15) de support de la buse d'enfilement (16a, 16b) supporte des ciseaux (20).
  7. Dispositif selon la revendication 6, caractérisé en ce qu'une lame inférieure (20b) des ciseaux (20) est solidarisée avec le bras de support (15), tandis qu'une lame supérieure (20a) des ciseaux est montée oscillante sur lui et peut être actionnée au moyen d'une bielle (19) dont une extrémité est fixée à la lame des ciseaux au moyen d'une articulation (18b) et dont l'autre extrémité située dans le boîtier (10) comporte une articulation (18a).
  8. Dispositif selon la revendication 1, caractérisé en ce que l'arbre de commande (14) est disposé obliquement dans le boîtier (10) de manière qu'il inscrive un angle aigu avec le plan du tissu (50), la distance séparant l'arbre de commande (14) et le tissu (15) croissant vers le peigne (40).
EP90810930A 1990-01-23 1990-11-29 Appareil à former les lisières pour métier à tisser Expired - Lifetime EP0438973B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH212/90 1990-01-23
CH21290 1990-01-23

Publications (2)

Publication Number Publication Date
EP0438973A1 EP0438973A1 (fr) 1991-07-31
EP0438973B1 true EP0438973B1 (fr) 1994-06-01

Family

ID=4181823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810930A Expired - Lifetime EP0438973B1 (fr) 1990-01-23 1990-11-29 Appareil à former les lisières pour métier à tisser

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US (1) US5080143A (fr)
EP (1) EP0438973B1 (fr)
JP (1) JPH04214444A (fr)
DE (1) DE59005938D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545839C1 (de) * 1995-12-08 1996-08-29 Dornier Gmbh Lindauer Verfahren und Webmaschine zur Handhabung eines Schußfadens
US6658552B1 (en) * 1998-10-23 2003-12-02 Micron Technology, Inc. Processing system with separate general purpose execution unit and data string manipulation unit
US7048011B2 (en) * 2003-09-10 2006-05-23 Printing Research, Inc. Printing press cylinder flexible jacket covering
BE1016236A6 (nl) * 2004-03-05 2006-05-02 Picanol Nv Kanteninleginrichting voor een weefmachine.
CZ2012797A3 (cs) * 2012-11-16 2014-03-05 Incot Spol. S R.O. Multifunkční zakládací tryska

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH472519A (de) * 1966-12-29 1969-05-15 Sulzer Ag Verfahren für den Betrieb einer Webmaschine und Maschine zur Durchführung des Verfahrens
IT999226B (it) * 1973-11-06 1976-02-20 Nuovo Pignone Spa Procedimento e dispositivi per ot tenere il ripiego nel passo di en trambi i capi del filo di trama in un tessuto realizzato con un telaio senza navetta ad alimentazione con tinua dei fili di trama
CH624440A5 (en) * 1976-07-30 1981-07-31 Silvio Sbabo Device on a weaving machine for cutting off, holding and bending round the weft-thread end to form the selvedge
IT1218130B (it) * 1987-05-25 1990-04-12 Manea Cost Mecc Cimossatrice per la formazione di una cimossa rientrata allehherita e con spessore ridotto in tessuti prodotti su telai senza navetta
BE1000903A4 (nl) * 1987-09-02 1989-05-09 Picanol Nv Kanteninlagapparaat voor weefmachines.
BE1001310A3 (nl) * 1987-12-22 1989-09-19 Picanol Nv Inrichting voor het vormen van een zelfkant aan een weefsel bij weefmachines.
BE1001855A3 (nl) * 1988-06-29 1990-03-20 Picanol Nv Pneumatische draadklem voor een kanteninlegapparaat bij weefmachines.

Also Published As

Publication number Publication date
JPH04214444A (ja) 1992-08-05
DE59005938D1 (de) 1994-07-07
US5080143A (en) 1992-01-14
EP0438973A1 (fr) 1991-07-31

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