WO2000011249A1 - Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage - Google Patents

Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage Download PDF

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Publication number
WO2000011249A1
WO2000011249A1 PCT/EP1999/002013 EP9902013W WO0011249A1 WO 2000011249 A1 WO2000011249 A1 WO 2000011249A1 EP 9902013 W EP9902013 W EP 9902013W WO 0011249 A1 WO0011249 A1 WO 0011249A1
Authority
WO
WIPO (PCT)
Prior art keywords
rapier
belt
gripper
rib
guide
Prior art date
Application number
PCT/EP1999/002013
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
Priority claimed from DE19838476A external-priority patent/DE19838476A1/de
Priority claimed from BE9800781A external-priority patent/BE1013013A3/nl
Application filed by Picanol N.V. filed Critical Picanol N.V.
Priority to EP99917854A priority Critical patent/EP1123430B1/fr
Priority to DE59914379T priority patent/DE59914379D1/de
Publication of WO2000011249A1 publication Critical patent/WO2000011249A1/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
    • D03D47/23—Thread grippers
    • 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

  • Rapier weaving machine with at least one rapier belt and guide means
  • the invention relates to a rapier weaving machine with at least one rapier belt that drives a rapier that lies substantially above the upper side of the rapier belt, and with a sley to which a reed and guide means are attached, which have guides for the rapier belt that face the upper side, are assigned to a side flank and the underside of the gripper belt and a rib projecting downwards.
  • the applicant uses a rapier weaving machine of the type mentioned at the outset in its rapier weaving machines currently sold.
  • the construction corresponds essentially to US 5,413,151.
  • a guide part is attached, in the longitudinal center of which a gripper is attached.
  • the guide part has a rib projecting downward on the side facing away from the reed.
  • the leadership ⁇ part and the rapier are performed with mounted on the batten hook-shaped guide means that are open to the reed out.
  • the hook-shaped guide means have guides that the top of the guide member and the gripper belt and the bottom of the guide member and Gripper belt are assigned.
  • a further guide is assigned to the side flank of the gripper belt and the guide part facing away from the reed. Furthermore, guides are provided which guide the rib of the guide part in the transverse direction, so that the guide part is guided on all sides with the gripper.
  • hook-shaped guide elements are attached to the sley, which almost completely enclose the top and the bottom of the rapier belt.
  • the underside of the gripper belt is provided with a groove running in the longitudinal direction, into which guides of the hook-shaped guide means engage, so that the gripper belt is also guided in the transverse direction. Since the hook-shaped guide means almost completely enclose the gripper belt, the gripper is attached to the side of the gripper belt.
  • the lateral arrangement of the gripper on the gripper belt leads to considerable transverse loads on the gripper belt, in particular when braking and accelerating, so that relatively heavy wear also occurs. If a certain amount of wear is reached, the entire gripper belt must be replaced with this type.
  • EP 0 709 505 AI it is also known from EP 0 709 505 AI to provide two different types of guide means instead of the hook-shaped guide means, one of which is the guide means of the top of the gripper belt and the guide means of the other type are assigned to the underside of the gripper belt.
  • the guides of the two guide means can be ground here, remains the disadvantage of the lateral arrangement of the grippers and the resulting stresses in the transverse direction.
  • EP 0 715 009 AI In order to avoid the stresses in the transverse direction of the type according to US 4,834,146 and the type according to EP 0 709 505 AI, it is known from EP 0 715 009 AI to guide only the underside of the gripper belt by means of guide elements and the gripper centrally on the Arrange the top of the gripper belt.
  • the guide elements engage in a groove on the underside of the gripper belt.
  • the gripper should be designed so that its center of gravity coincides with the center of gravity of the gripper belt or is still below this. However, it has not been disclosed how a gripper must be designed so that its center of gravity is in or below the center of gravity of the gripper belt.
  • the invention has for its object to improve a rapier weaving machine of the type mentioned so that the wear is reduced.
  • the rib is arranged at a lateral distance from the side flanks of the gripper belt. net is that the guide means form guides for the top, the side flank and the underside of the rapier in the edge region of the rapier band facing away from the reed, and that the guide means in the area facing the reed guides for the underside of the rapier band and for the reed facing Form the side flank of the rib, while the underside and the side flank of the rib facing away from the reed are unguided.
  • the invention is based on the consideration that the main cause of the wear are forces that are caused in particular when braking and accelerating from the gripper head, which has a center of gravity above the top of the gripper belt, so that the forces tend to the gripper belt and if necessary, a guide part that extends the gripper belt and rotates the gripper is rotated about the longitudinal axis.
  • the invention therefore provides that the guides, which counteract the twisting of the gripper belt, engage the gripper belt with the cheapest possible lever arms, so that the forces acting against the twisting are reduced.
  • the guide means Since the rib is arranged at a distance from the side flank of the gripper belt facing away from the reed, it is possible for the guide means to form guides for the underside of the gripper belt on both sides of the rib.
  • an area of the underside of the gripper belt and / or of the guide part is created, in particular on the side of the rib facing away from the reed, on which a guide is supported, which has a cheap lever arm and thus a relatively small amount Counteracts twisting forces.
  • a particular advantage is that the side flank facing away from the reed and thus towards the edge of the goods and the underside of the rib do not work together with guides of the guide means.
  • FIG. 1 shows a cross section through a rapier weaving machine according to the invention in a schematic representation
  • FIG. 3 shows a detail of FIG. 2 on a further enlarged scale with different positions of a reed and guide means
  • FIG. 4 shows a plan view of the gripper belt according to FIG. 3,
  • FIG. 5 shows a section similar to FIG. 3 with two types of guide means
  • FIG. 6 shows a section similar to FIG. 5 with an additional guide rib
  • FIG. 7 is a view in the direction of arrow F7 of FIG. 5,
  • FIG. 8 shows a section similar to FIG. 3 of a modified embodiment
  • FIG. 9 is a view in the direction of arrow F9 of FIG. 8,
  • FIG. 10 is a plan view of the gripper belt of FIG. 9,
  • FIG. 11 shows a section along the line XI-XI of FIG. 10,
  • FIG. 12 is a view similar to FIG. 9 of a further embodiment.
  • FIG. 13 is a plan view of the gripper belt according to FIG. 12.
  • the weaving machine 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, i.e. in 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 slave gripper 8 and the master gripper 7 into an open shed and pull them out again.
  • the gripper belts 9 are preferably made of fiber-reinforced plastic and essentially have a flat, rectangular cross-section, their flat sides each lying approximately horizontally.
  • a longitudinal rib 53 projects downward from the underside, the height of which corresponds approximately to the thickness of the gripper belts 9.
  • the width of the rib 53 corresponds approximately to its height.
  • 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 are driven by means of gear wheels 12, 13, around which they are guided. 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 a 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 arranged directly on the ends of the gripper belts 9 or on guide parts which are each attached to the front ends of the gripper belts 9.
  • the guide parts are designed so that they correspond to the cross section of the gripper belts 9.
  • the gripper belts 9 are guided by means of guide means 17.
  • These guide means 17, which will be explained in detail in the following figures, are components which have only a slight extension in the longitudinal direction of the shed and which are drawn in an exaggerated manner in FIG. 1 for the sake of illustration.
  • the guide means 17 are arranged on the sley 3 so that they move with the sley 3 and the reed 6. They dip into a shed 21 from below, as shown in FIGS. 2 and 3.
  • This shed 21 is formed by an upper warp thread sheet 22 and a lower warp thread sheet 23, which are raised and lowered by means of shed forming means (not shown) and converge in the fabric edge 24.
  • the thread guide means 17 are so narrow in the longitudinal direction of the shed 21 that they can pass between the warp threads of the lower warp thread sheet 23.
  • the guide means 17 are moved out of the shed 21 through the lower warp thread sheet 23. If the reed 6 is moved back to the position shown in solid lines in FIG. 3, the guide means 17 penetrate the lower warp thread sheet 23 again and enter the shed 21. After a weft thread has been struck, the shed 21 is changed, with at least some of the warp threads of the upper warp thread sheet 22 being moved downward and at least some of the warp threads of the lower warp thread sheet 23 being moved upward.
  • the guide means 17 are fastened to a weaving frame profile 26 by means of screws 25.
  • the master gripper 7 and the slave gripper 8 can be attached to guide parts 18 (FIG. 12), which are arranged in an aligned extension of the gripper belts 9. 2 to 5 only one encoder gripper 7 is shown with its gripper belt 9. Since the guidance of the gripper belt 9 of the slave gripper 8 is identical in mirror image, the description also applies to the guidance of the gripper belt 9 of the slave gripper.
  • the gripper belt 9 shown in FIGS. 2 and 3 has a cross-shaped cross section with arms 50, 51, 52 and 53 arranged symmetrically to a central, vertical plane of symmetry 34.
  • the arm 53 forms a rib projecting downwards.
  • rows of holes 58, 59 are provided (FIG. 4), which are intended for the engagement of teeth of the drive gear wheels 12, 13 arranged in two rows.
  • the guide means 17 have two guide elements 55, 56, of which the guide elements 55 are assigned to the rapier 9 on the side facing the reed 6 and the guide elements 56 are assigned to the rapier 9 on the side facing away from the reed 6.
  • the guide elements 56 form three guides, of which a guide 31 is assigned to the upper side of the rapier belt 9, a guide 34 to the side flank facing away from the reed 6 and a guide 32 to the underside of the rapier belt 9. These three guides 31, 34, 32 enclose the lateral edge region of the gripper belt 9 facing away from the reed 6.
  • the guide elements 55 form two guides, of which a guide 29 on the side of the rib 53 facing the reed 6 is assigned to the underside of the gripper belt 9, while the further guide 30 is assigned to the side flank of the rib 53 facing the reed 6.
  • a distance A is left between the guide 32 and the side flank of the rib 53 facing away from the reed 6, so that guides of the guide means 17 are not assigned to this side flank or the underside of the rib 53.
  • the warp threads lie against this rib 53 when the shed 21 is closed, if the rapier belts 9 have not yet been completely pulled out of the loom, so that they are guided by elements of the rapier belt 9. that are not subject to wear.
  • This rib 53 extends at least over the length of the rapier belt 9, which can be inserted into the shed 21.
  • the embodiment according to FIG. 5 differs from the embodiment according to FIGS. 2 and 3 primarily by the guide means.
  • the guide elements 55, 56 are arranged offset to one another in the direction of movement of the gripper belt 9.
  • the guide elements 55 and the guide elements 56 can each be individual components which are fastened to the weaving frame profile 26 separately from one another by means of screws 25.
  • components are provided which each contain a guide element 55 and a guide element 56 as one structural unit, but which are at a distance from one another in the direction of movement of the gripper belts 9.
  • the guide elements 55 have a guide 30 assigned to the side flank of the rib 53 facing the reed 6 and a guide 29 assigned to the underside of the gripper belt 9.
  • the guide 29 extends approximately over a third of the width of the Gripper belt 9.
  • the guide elements 56 grip the gripper belt 9 on the side facing away from the reed 6 and have a guide 31 assigned to the upper side, a guide 32 assigned to the underside and a guide 34 assigned to the intermediate side flank.
  • fastening means 35 of the gripper 7 are offset off-center in the direction of the reed 6 the gripper belt 9 or a guide part attached.
  • the guides 29, 32 and 31 guide the gripper belt 9 in the vertical direction.
  • the guides 30 and 34 guide the gripper belt 9 in the horizontal direction, so that the gripper belt 9 is guided in all directions.
  • tolerances must be provided between the guides 29, 30, 31, 32, 34 and the gripper belt 9, which are approximately in the order of magnitude of 0.3 mm. Because of the center of gravity of the gripper 7, which is eccentric with respect to the gripper belt 9, forces arise in particular when accelerating and braking, which tend to twist the gripper belt 9. Because of these forces, the gripper belt 9 actually rotates within the tolerances, so that in particular when rotating (counterclockwise) from the reed 6 there are almost point loads in the region of the guides 30, 31 and 32.
  • the guides 30, 31 and 32 are arranged and designed such that the load points act with a lever arm as large as possible against the rotation, so that the forces of the almost punctiform loads are then relatively low can be held.
  • the guide means 55, 56 are usually arranged at uniform intervals in the longitudinal direction of the shed 21. In order to reduce heavy loads on the gripper belt 9 in the areas in which accelerations and braking occur, which want to turn the gripper belt 9 with the gripper 7 away from the reed 6, it can further be provided that the guide means 56 and possibly also the guide means 55 are arranged in closer succession.
  • the use of two different types of guide elements 55, 56, which each form guides 29, 30 and 31, 32, 34, which lie opposite one another, has the advantage that all guides for a grinding tool are accessible and can therefore be machined by grinding.
  • the guides 29, 30 of the guide means 55 can be processed by means of separate grinding processes or by means of a profile grinding wheel.
  • the guides 31, 32, 34 of the guide means 56 can be machined very precisely by means of a profile grinding wheel. This grinding of the guides 29 to 34 has the advantage that very smooth guide surfaces can be created and that these guides can be tolerated very precisely to one another.
  • two types of guide means are provided, in which the guides 29 to 34 are distributed in a different way.
  • a hook-shaped guide means which has the guides 29, 30, 31, 34 and a second guide means which is provided with the guide 32.
  • a guide means can be provided corresponding to the guide means 55, which has the guides 29 and 30, and in addition to this guide means a guide means with the guides 31, 34 and a further guide means with the guide 32.
  • the embodiment according to FIG. 6 differs from the embodiment according to FIGS. 3 and 5 initially in that the rib 53 'of the gripper belt 9' does not lie in the longitudinal center plane, but is offset in the direction of the edge of the goods 24.
  • a metal guide rib 28 is inserted into the underside of this rib 53 'and extends essentially over the length of the gripper.
  • the embodiment according to FIGS. 8 to 11 provides that in the area of the gripper 7 a guide rib 28 'is provided in the form of an angularly bent sheet 70, one leg of which is arranged on the side next to the rib 53', to which no guide is assigned is. This rib maintains a distance B from the guide elements 56, so that this guide rib 28 'cannot be damaged either.
  • the guide rib 28 ' projects downward over the rib 53'.
  • the bent sheet metal 70 is provided in the area opposite the guide rib 28 with a plurality of lugs 71 which engage in recesses 72 which are provided in the top of the beginning of the gripper belt 9, as shown in FIG. 10.
  • the plate 70 is held clamped between the gripper 7 and the gripper belt 9 'by means of the lugs 71.
  • Fig. 10 it is also shown that the gripper belt 9 'is provided with a row of holes 60 which serves to receive the teeth of the gears 12, 13.
  • This row of holes 60 is arranged off-center next to the rib 53 ', on the side closer to the reed 6. As in the embodiment according to FIGS. 2 and 3, this prevents the holes in the rows of holes from going through the rib 53 '.
  • FIGS. 12 and 13 it is of course within the scope of the invention not to fasten the master gripper 7 and / or the slave gripper 8 directly to the front end of the gripper belt 9, but rather to a guide part 18 whose contour is produced as a separate component Contour of the gripper belt 9 essentially corresponds.
  • a guide part 18 is expediently made of plastic.
  • the gripper belt 9 according to FIGS. 12 and 13 has a contour similar to the contour of the gripper belt according to FIG. 3, but the rows of holes 58, 59 are offset from one another in the longitudinal direction of the gripper belt 9. orders, engage in the two rows of teeth of the drive gears 12, 13.
  • the rib 53, 53 ' can be produced in one piece with the gripper belt 9, 9' concerned. It is also possible to produce the rib 9, 9 'as a separate component and to subsequently attach it to the underside of the gripper belt 9, 9', for example by means of screw connections.
  • the gripper belts 9, 9 ' are not guided around the drive gears 12, 13 as in FIG. 1, but are guided tangentially to these drive gears.

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

Abstract

L'invention concerne un métier à tisser à pinces comportant au moins une bande pour pinces (7). Ce métier comprend des moyens de guidage (55, 56) qui forment, dans la zone marginale de la bande à pinces (9) opposée au peigne (6), des guides (31, 32, 34) pour la face supérieure, un flanc et la face inférieure de la bande à pinces (9). Une nervure (53) est placée latéralement à une certaine distance des flancs de la bande à pinces (9) et les moyens de guidage (55) forment, dans la zone faisant face au peigne (6), des guides (29, 30) pour la face inférieure de la bande à pinces (9) et pour le flanc de la nervure (53) faisant face au peigne (6).
PCT/EP1999/002013 1998-08-25 1999-03-24 Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage WO2000011249A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99917854A EP1123430B1 (fr) 1998-08-25 1999-03-24 Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage
DE59914379T DE59914379D1 (de) 1998-08-25 1999-03-24 Greiferwebmaschine mit wenigstens einem greiferband und führungsmitteln

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19838476.9 1998-08-25
DE19838476A DE19838476A1 (de) 1998-08-25 1998-08-25 Greiferbandwebmaschine mit wenigstens einem Greiferband und Führungsmitteln
BE9800781A BE1013013A3 (nl) 1998-10-29 1998-10-29 Grijperband voor een grijperweefmachine.
BE9800781 1998-10-29

Publications (1)

Publication Number Publication Date
WO2000011249A1 true WO2000011249A1 (fr) 2000-03-02

Family

ID=25663153

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/002013 WO2000011249A1 (fr) 1998-08-25 1999-03-24 Metier a tisser a pinces comportant au moins une bande a pinces et des moyens de guidage

Country Status (3)

Country Link
EP (1) EP1123430B1 (fr)
DE (1) DE59914379D1 (fr)
WO (1) WO2000011249A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1397230A (fr) * 1964-01-17 1965-04-30 Perfectionnements aux machines à tisser à alimentation continue en trame
EP0275479A1 (fr) * 1986-12-23 1988-07-27 VAMATEX S.p.A. Moyens pour guider le movement d'une paire de pince-trame dans la foule d'un métier à tisser
EP0285001A2 (fr) * 1987-04-03 1988-10-05 Textilma AG Métier à tisser à griffes
EP0406926A1 (fr) * 1989-07-06 1991-01-09 Picanol N.V. Métier à tisser à griffes avec guidage des rubans
EP0576854A1 (fr) * 1992-07-03 1994-01-05 Picanol N.V. Métier à tisser à griffes
DE9413172U1 (de) * 1994-08-16 1994-10-13 Textilma Ag, Hergiswil Greiferwebmaschine
EP0709505A1 (fr) * 1994-10-27 1996-05-01 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Voie de guidage pour les bandes à griffes dans les métiers à tisser
EP0715009A1 (fr) * 1994-11-30 1996-06-05 NUOVA VAMATEX S.p.A. Moyen pour guider le mouvement d'une paire de griffes lelong de la foule de métiers à tisser
DE19713628A1 (de) * 1997-04-02 1998-10-08 Picanol Nv Greiferwebmaschine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1397230A (fr) * 1964-01-17 1965-04-30 Perfectionnements aux machines à tisser à alimentation continue en trame
EP0275479A1 (fr) * 1986-12-23 1988-07-27 VAMATEX S.p.A. Moyens pour guider le movement d'une paire de pince-trame dans la foule d'un métier à tisser
EP0285001A2 (fr) * 1987-04-03 1988-10-05 Textilma AG Métier à tisser à griffes
EP0406926A1 (fr) * 1989-07-06 1991-01-09 Picanol N.V. Métier à tisser à griffes avec guidage des rubans
EP0576854A1 (fr) * 1992-07-03 1994-01-05 Picanol N.V. Métier à tisser à griffes
DE9413172U1 (de) * 1994-08-16 1994-10-13 Textilma Ag, Hergiswil Greiferwebmaschine
EP0709505A1 (fr) * 1994-10-27 1996-05-01 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Voie de guidage pour les bandes à griffes dans les métiers à tisser
EP0715009A1 (fr) * 1994-11-30 1996-06-05 NUOVA VAMATEX S.p.A. Moyen pour guider le mouvement d'une paire de griffes lelong de la foule de métiers à tisser
DE19713628A1 (de) * 1997-04-02 1998-10-08 Picanol Nv Greiferwebmaschine

Also Published As

Publication number Publication date
DE59914379D1 (de) 2007-07-26
EP1123430B1 (fr) 2007-06-13
EP1123430A1 (fr) 2001-08-16

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