WO2000011250A1 - Metier a tisser a lance - Google Patents

Metier a tisser a lance Download PDF

Info

Publication number
WO2000011250A1
WO2000011250A1 PCT/EP1999/005139 EP9905139W WO0011250A1 WO 2000011250 A1 WO2000011250 A1 WO 2000011250A1 EP 9905139 W EP9905139 W EP 9905139W WO 0011250 A1 WO0011250 A1 WO 0011250A1
Authority
WO
WIPO (PCT)
Prior art keywords
gripper
rapier
belt
guide
weaving machine
Prior art date
Application number
PCT/EP1999/005139
Other languages
German (de)
English (en)
Inventor
Kristof Roelstraete
Original Assignee
Picanol N.V.
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 Picanol N.V. filed Critical Picanol N.V.
Publication of WO2000011250A1 publication Critical patent/WO2000011250A1/fr

Links

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

Definitions

  • the invention relates to a rapier weaving machine with at least one rapier band, which is provided at its end with a rapier which can be inserted and pulled out again in a shed made of warp threads in front of a sley by means of the rapier band.
  • a rapier weaving machine of the type mentioned at the outset is known, for example, from EP 0 576 854 AI.
  • the rapier belt and a guide part of the rapier fastened to it are guided by means of guide means which can be moved into and out of a shed with the movement of the shutter.
  • guide means which can be moved into and out of a shed with the movement of the shutter.
  • warp threads that are not completely correctly positioned may be caught between the guide means and the rapier belt and damaged or torn.
  • the aim of such rapier weaving machines is to increase the working speed and in particular the weft frequency.
  • the weft frequency can be increased in particular if the shed into which a weft thread has just been inserted is already closed again before the gripper (s) have been completely pulled out of the shed.
  • the warp threads with the looper band or the guide belt of the gripper come into contact and are drawn into the guide means.
  • the invention has for its object to develop a rapier weaving machine of the type mentioned so that the risk is reduced that the rapier or a guide part of the rapier comes into contact with the warp threads.
  • the gripper is provided on the side facing the reed with an attachment which, seen in the longitudinal direction of the gripper belt, forms a guide rib projecting downward beyond the contour of the gripper belt and extending in the direction of movement of the gripper belt.
  • This guide rib keeps the warp threads at a distance from the underside of the hook belt so that it does not come into contact with the warp threads. This also prevents warp threads from being caught and damaged between the looper belt and the guides. Since the approach is part of the metallic gripper, it has a relatively low coefficient of friction with the warp threads, so that the risk of damage is significantly reduced, while also the approach has a relatively long life, since it is also not significantly worn by the warp threads.
  • the extension is designed as an angle, one leg of which is flush with the top of the rapier band and the other of which is flush with the side surface of the rapier band facing the reed.
  • FIG. 1 shows a cross section through a rapier weaving machine according to the invention in a schematic representation
  • FIG. 2 shows a section along the line II-II of FIG. 1 with different positions of the reed and guide means
  • FIG. 3 is a perspective view of an encoder gripper designed according to the invention.
  • Fig. 4 is a perspective view of a gripper designed according to the invention.
  • the loom shown in Fig. 1 has two side parts 1, 2, in which a sley 3 is mounted.
  • the sley 3 is provided on both sides with drives 4, 5, by means of which it can be driven to move back and forth.
  • a reed 6 is arranged on the sley 3, by means of which inserted weft threads are struck on the edge of the goods.
  • the weft threads are introduced into a shed in a known manner by means of a donor gripper 7 and a slave gripper 8.
  • the donor gripper 7 takes over a weft thread on one side of the weaving machine in a known manner and transports it to approximately the middle of the weaving machine, ie into the Middle of a shed. There it is taken over by the take-up rapier 8, which then brings it to the opposite side of the weaving machine.
  • the master gripper 7 and the slave gripper 8 are each driven by means of a gripper belt 9, which push the master gripper 7 and the slave gripper 8 into an open shed and pull them out again.
  • the gripper belts 9 are preferably made of fiber-reinforced plastic and have a flat, rectangular cross section, with their flat sides each lying approximately horizontally.
  • the gripper belts 9 are guided in the area of the side parts 1, 2 by means of stationary guides 10, 11.
  • the gripper belts 9, which have a row of holes in their longitudinal center, are driven by means of gear wheels 12, 13, which they wrap around. They are held on the circumference of the gear wheels 12, 13 by means of guide blocks 14.
  • the gears 12, 13 are driven by means of drives 15, 16 for the reciprocating rotary movement.
  • the drives 15, 16 are synchronized with the drives 4, 5 of the sley 3.
  • the master gripper 7 and the slave gripper 8 are fastened on guide parts 17, 18 which extend the respective front ends of the gripper belts 9.
  • the gripper belts 9 and the guide parts 17, 18 are guided within the shed by means of guide means 19, 20, which are shown exaggeratedly wide in FIG. 1.
  • the guide means 19, 20 are attached to a profile 24 of the sley 3, so that they move together with the sley 3 and the reed 6.
  • the reed pivots into the position shown in dashed lines.
  • the guide means 19, 20 are pivoted out of a shed 21 formed by warp threads 22, 23.
  • thaw Chen the guide means 19, 20 again in the shed 21, where they penetrate between the warp threads of the lower warp thread sheet 23.
  • the guide means 19, 20 form guides for the underside of the gripper belt 9 and the guide parts 17, 18 of the grippers 7, 8 as well as guides for the upper side, the side surfaces facing away from the reed 6 and for a rib 25, which are separated from the guide part 17 and / or the gripper belt 9 projects downwards.
  • the guide means 19, 20 thus guide at least the guide parts 17, 18 in the vertical direction and in the horizontal direction.
  • the encoder gripper 7 according to FIG. 2 or the encoder gripper according to FIG. 3 is provided with an attachment 27 in the form of an angle, which is fastened in alignment with one leg on the top of the guide part 17 and the other leg in alignment with or close to that of the reed 6 facing side surface of the guide part 17 extends downward and projects beyond the guide part 17 and thus - seen in the longitudinal direction of the gripper belt 9 - also the gripper belt 9.
  • the slave gripper 8 according to FIG. 4 is provided with an extension 32 which extends over the guide part 18 and extends in part over the gripper belt 9 and projects beyond the guide part 18 and the gripper belt 9 downwards.
  • the lugs 27, 32 as well as the entire grippers 7, 8 are made of metal, for example of a stainless steel or aluminum.
  • the lugs 27, 32 form guide ribs with the lower edges, by means of which warp threads are kept out of the area of the gripper 7, 8 and also out of the area of the guide parts 17, 18 of the grippers 7, 8.
  • this guide rib prevents warp threads between the gripper belts 9 and / or the guide parts 17, 18 and the guides 19, 20 from being caught and possibly destroyed.
  • it is possible, as indicated by the dash-dotted line to at least partially overlap the closing movement or alternating movement for the shed with the movement of the grippers 7, 8. like to close the shed 21 before the grippers 7, 8 are completely pulled out of the shed 21.
  • the warp threads of the lower warp thread family 23 shown with the dash-dotted line 23 ' are held outside the area of the grippers 7, 8 and the guide parts 17, 18 by means of the lugs 27, 32 which function as a guide rib.
  • rib 25 of the guide parts 17, 18 and / or the gripper belt 9 is preferably made of metal, e.g. made of stainless steel, existing strip 26 used, for example glued, which extends over the range of the length of the gripper 7, 8. As can be seen from FIG. 2, this strip 26 serves as a second guide rib, which helps to keep warp threads 23 'outside the area of the grippers 7, 8 and the guide parts 17, 18.
  • FIG. 3 An example of a sensor gripper 7 is shown in FIG. 3.
  • This encoder gripper 7 is fastened on the guide part 17 in a manner not shown, for example with the aid of screws.
  • the angular extension 27 is attached, which in the embodiment shown is limited to the area of the guide part 17.
  • the encoder gripper 7 is provided with a guide rib 28 which extends into the area of the gripper belt 9.
  • an extension 27 of appropriate length i.e. an extension 27 which extends into the area of the gripper belt 9.
  • the extension 27 is provided at both ends with bevels 29, 30, on which warp threads possibly lying in this area can slide along the warp thread family 23.
  • the 4 shows an example of a sensor gripper 8 which is fastened on the top of a guide part 18, for example by means of screws.
  • the encoder gripper 8 is provided with an upper guide bar 31 which extends into the region of the front end of the gripper belt 9.
  • the approach 32 of the gripper 8 is part of the gripper 8 or directly attached to the guide member 18. It extends beyond the front end of the guide part 18. It also extends to the rear into the area of the gripper belt 9. In deviation from the embodiment shown, it can be provided that the extension has approximately the length of the guide bar 31.
  • the lower edges of the lugs 27, 32 serving as guide ribs, along which warp threads may slide, are expediently rounded.
  • they are ground and / or polished in order to have the lowest possible coefficient of friction with the material of the warp threads.
  • guide parts 17, 18 are provided for the grippers 7, 8.
  • these grippers 7, 8 are then attached directly to the end of the gripper belts.
  • these gripper belts are then provided with one or two ribs on their underside.
  • a bar, which serves as a guide rib, corresponding to the bar 26, directly into an area of the underside of the gripper belt 9 which does not come into contact with the guide means 19, 20.
  • the underside of the rib 25 is not in contact with the guide means 19, 20, so that the strip 26 can be attached there.
  • such a strip like the lugs 27, 32, may only extend over the area of the gripper belt that is not bent around the toothed wheels 12, 13.

Landscapes

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

Abstract

L'invention concerne un métier à tisser à lance comprenant au moins une bande (9) pourvue à son extrémité d'une lance (7). Cette lance (7) est dotée, côté opposé au peigne miseur (6), d'une saillie (27) constituant - vu dans le sens longitudinal de la lance - une nervure de guidage qui est orientée vers le bas en enveloppant le contour de la bande, qui déborde sur un élément de guidage (17) de la lance (7) et qui s'étend dans le sens de déplacement de la lance.
PCT/EP1999/005139 1998-08-25 1999-07-19 Metier a tisser a lance WO2000011250A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838477.7 1998-08-25
DE1998138477 DE19838477A1 (de) 1998-08-25 1998-08-25 Greiferbandwebmaschine

Publications (1)

Publication Number Publication Date
WO2000011250A1 true WO2000011250A1 (fr) 2000-03-02

Family

ID=7878581

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/005139 WO2000011250A1 (fr) 1998-08-25 1999-07-19 Metier a tisser a lance

Country Status (2)

Country Link
DE (1) DE19838477A1 (fr)
WO (1) WO2000011250A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE522719C2 (sv) * 2003-03-25 2004-03-02 Texo Ab Anordning vid vävmaskin

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0576854A1 (fr) * 1992-07-03 1994-01-05 Picanol N.V. Métier à tisser à griffes
DE19713628A1 (de) * 1997-04-02 1998-10-08 Picanol Nv Greiferwebmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0576854A1 (fr) * 1992-07-03 1994-01-05 Picanol N.V. Métier à tisser à griffes
DE19713628A1 (de) * 1997-04-02 1998-10-08 Picanol Nv Greiferwebmaschine

Also Published As

Publication number Publication date
DE19838477A1 (de) 2000-03-02

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