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EP0526390B1 - Machine à tisser à pinces avec un dispositif d'insertion qui peut être ajusté suivant les caractéristiques de fil - Google Patents

Machine à tisser à pinces avec un dispositif d'insertion qui peut être ajusté suivant les caractéristiques de fil Download PDF

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Publication number
EP0526390B1
EP0526390B1 EP92810461A EP92810461A EP0526390B1 EP 0526390 B1 EP0526390 B1 EP 0526390B1 EP 92810461 A EP92810461 A EP 92810461A EP 92810461 A EP92810461 A EP 92810461A EP 0526390 B1 EP0526390 B1 EP 0526390B1
Authority
EP
European Patent Office
Prior art keywords
gripper
clamp
giver
taker
thread
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
EP92810461A
Other languages
German (de)
English (en)
Other versions
EP0526390A1 (fr
Inventor
Kurt Günther
Theo Thalmann
Angelo Stacher
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 EP0526390A1 publication Critical patent/EP0526390A1/fr
Application granted granted Critical
Publication of EP0526390B1 publication Critical patent/EP0526390B1/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
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/005—Independent drive motors
    • 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
    • D03D47/18—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 two weft inserters meeting at or near the middle of the shed and transferring the weft from one to the other
    • 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
    • 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
    • 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
    • D03D47/273—Rapier rods
    • 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
    • D03D47/275—Drive mechanisms

Definitions

  • the invention relates to a method for operating a rapier weaving machine according to the preamble of claim 1 and a rapier weaving machine.
  • rapier weaving machines are known in which the rapier and rapier grippers are driven by program-controlled servomotors.
  • DE-A 3 224 708 discloses a rapier weaving machine with a clamp opener in the center. These clamp openers are operated via shafts and cams that are driven by the main drive of the weaving machine.
  • the hook heads have wedge clamps for the weft thread, with which the thread can be picked up automatically at the entrance to the compartment (by the rapier gripper) or in the middle (by the rapier gripper) without the clamps having to be actuated.
  • the existing actuation levers for opening the thread clamps are used to open the clamps at the reversal points of the hook heads outside the compartment by means of overrun cams, in order to be able to remove stuck fibers, for example with blow nozzles (for the holster gripper also to release the weft thread).
  • the automatically acting thread clamps of the rapier heads mean an advantageous simplicity of the rapier weaving machines; however, there is a certain susceptibility to faults depending on the type of yarn. For example, if a heavy, stiff yarn is woven in, there is a risk that the thread transfer from the bringer to the hauler fails.
  • the grippers experience maximum acceleration in the extension direction due to the drive by the space crank mechanism, and thus maximum force of inertia acts on the weft gripper's weft yarn.
  • this inertia force is opposite to the direction of movement and this can lead to the weft yarn sliding out of the thread clamp before being picked up by the rapier gripper and thus no longer being able to be transferred. If you want to remedy this problem by increasing the clamping force of the bringer thread clamp, you are dealing with a new problem. In this case, it can happen that the yarn is damaged - for example torn - when it is pulled out of the bringer by the puller with a force that is inevitably increased in accordance with the greater clamping force.
  • the problem described also applies to weaving machines with bar grippers.
  • the invention therefore also relates to such weaving machines.
  • the clamp openers according to the invention By providing the clamp openers according to the invention in the middle of the compartment at the thread transfer point, further degrees of freedom are gained.
  • the clamping force of the thread clamp can thus be specified to a greater extent, since a forced loosening of the thread clamp by the clamp opener now prevents damage to the weft yarn during takeover.
  • the use of terminal openers is known per se (see for example DE-OS 3224708).
  • the clamp opener according to the invention is driven by a servomotor in a program-controlled manner.
  • this has the advantage that the terminal opener can be individually, i.e. can be adjusted to the individual type of thread or "weft color". Under certain circumstances, actuation of the clamp opener can only be provided for individual shot colors.
  • Both measures according to the invention namely belt drive (or rod drive) by servomotors or clamp openers also with servomotors, when used individually mean a possible improvement in the weft insertion.
  • the combination of both measures results in a particularly advantageous weft insertion device.
  • servomotors of the gripper drives are preferably highly dynamic Servomotors used.
  • Such servomotors are characterized by the fact that they can be used in a program-controlled manner similar to stepper motors, but that, in contrast to stepper motors, they have much higher torques (around 300 Nm) at the speeds typical for rapier weaving machines (around 500 min -1 ) and weaving widths (around 2 m ) can deliver.
  • the two rapiers namely the rapier rapier 1 with the weft thread 3 and the rapier rapier 2, move towards one another in accordance with the arrows B and H in FIG.
  • the rapier rapier 1 moves towards one another in accordance with the arrows B and H in FIG.
  • the mirrored weft 3' is held by the wedge clamp, which is formed by the two legs 11 'and 12', at the clamping point 31 '(or 31).
  • the clamp leg 11 ' is resilient, so that by pressing the actuating lever 13' (or 13), which is connected to the clamp leg 11 ', the thread clamp can be opened.
  • the mirror 9 is, of course, arranged below the carrier gripper 1 for illustration purposes only.
  • the gripper 1 is moved by the flexible belt 4 (mirror image 4 ').
  • the picker 2 is inserted into the picker so far that the hook-shaped tip 22 of the picker 2 can grip the weft thread 3 when it is pulled back (arrow G).
  • the weft thread 3 is held at the clamping point 32 by the wedge clamp formed from the hook 22 and the movable clamping part 21.
  • the wedge clamp is opened outside the shed and by pressing the actuating lever 23 and by means of the indicated mechanism 24, by means of which the clamping part 21 is withdrawn.
  • FIG. 2 the drive of the oscillating movement (double arrow A), which is generated by means of the belt 4, the belt wheel 41 and the space crank drive 50, is shown for the gripper 1.
  • the drive shaft 501 rotates at a constant angular velocity, which is transmitted by the space crank drive 50 into an oscillating pivoting movement of the toothed segment 502 and of the belt wheel 41 - via the toothed wheel 42.
  • 3 shows the servomotor 5, which according to the invention replaces the space crank mechanism 50, the pinion 52 taking the place of the toothed segment 502.
  • the drive energy and the control signals for the servomotor 5 are supplied via the cable 51.
  • the servomotor 5 can of course also be connected directly to the belt wheel without an intermediate gear.
  • the diagram of FIG. 4 shows the working phase of the weaving machine on the downward ordinate.
  • this work phase is related to the angular position of the main shaft and expressed by machine degree (MGR).
  • MGR machine degree
  • the 0 ° position ie the start of the machine cycle, is the gripper reversal point outside the compartment in the present example.
  • the abscissa of the diagram indicates the positions of the gripper heads, more precisely of the clamping points 31 and 32 (see FIGS. 1a, b).
  • the weave or compartment width is indicated by the double arrow W.
  • the two cosine-shaped curves 10 and 20 represent the gripper movements over a machine cycle, as are generated by means of space crank drives.
  • FIG. 6 shows the conditions for a "phase-shifted" gripper movement, in which the point of reversal of the gripper gripper follows approximately 10 MGR after that of the Holger gripper.
  • the shot transfer is "flying" as in a relay race: Before the "change of hand” at point 30, the two gripper heads move briefly in the same direction, the holer gripper (curve 20) with increasing and the bringer gripper (curve 10) with decreasing speed, wherein the point gripper reaches its turning point at point 30 and is therefore currently stationary (although at the same time a maximum acceleration force is exerted on the ring gripper in the extension direction).
  • This transfer method is preferred for yarns with low tensile strength.
  • FIG. 7 shows an example of a clamp opener 6 according to the invention. It is arranged in the weaving machine under the fabric web in the area of the center of the compartment at the transfer point of the weft thread.
  • the control lever 61 is moved by the servomotor 62 via the gear arranged in the housing 63, which consists of the two gear wheels 64a and 64b, and the coupling 65. Some bearings, which are arranged in or on the wall of the housing 63, are indicated by cylinders 66a, 66b and 66c.
  • the gooseneck-shaped control lever 61 which is in the rest position in FIG. 7, must be short and stiff so that it can open the thread clamp of the associated hook as free of vibrations as possible so as not to cause any damaging effect on the weft thread.
  • the control lever 61 is aligned parallel to the warp threads of the shed (not shown). Its head part with the push part 610 must be narrow so that it can be gently pivoted into the shed between the warp threads (double arrow S).
  • the working position 61 'of the control lever 61 is indicated by dash-dotted lines in Figure 7. With a small, downward swiveling movement, the control lever in the working position 61 'can press the operating lever of the hook thread clamp.
  • the clamp opener 6 according to the invention can be made more space-saving. This is very important, since the spatial conditions in a weaving machine below the fabric web are mostly unfavorable and do not allow the known devices to be realized.
  • an intermediate gearbox similar to that of the No servomotor for the belt wheel drive an even more compact clamp opener can be constructed.
  • both hook heads reach their reversed positions practically simultaneously, where they each briefly remain in a standstill phase (curve sections 10a and 20a).
  • the bring thread clamp is opened (interval 601), so that the still standing grab gripper, whose thread clamp is now closed, can pull the weft thread out of the bring thread clamp and then take it with it during its retraction movement.
  • the retractor movement can also be carried out for the bringer gripper.
  • the grippers and in particular their thread clamps can be modified in such a way that the clamp openers according to the invention can act on them while the grippers are moving.
  • the actuating levers of the thread clamps have rollers or sliding surfaces, for example. In this case, it is no longer necessary for the grippers to come to a standstill when the thread clamps are forced to operate by the clamp openers.
  • the automatic operation of the wedge clamps can be dispensed with in the thread clamps. But if, like the first embodiment, only the clamp gripper is assigned a clamp opener, the holer gripper should continue to have a wedge clamp.
  • the belt wheel drive by servomotors can also be used in an advantageous manner during phases other than the thread transfer between the two grippers:
  • the weft thread is taken over by the rapier gripper at the entrance to the compartment, there is a particular susceptibility to faults, since "carry-along errors" can occur there.
  • the frequency of carry-on errors can be reduced by a programmed slowdown or even a brief standstill of the handler at the entrance to the compartment.
  • an asymmetrical course of the gripper movement can also be generated by means of the band wheel drive by servomotors.
  • the dot-dash line in Fig. 10 shows the symmetrical course for the phase-shifted gripper movement (see Fig. 6).
  • the solid curves represent the example of an asymmetrical gripper movement:
  • the thread transfer is "off-center" at line 96, which is shifted towards the bringer side with respect to the center line 95, where the thread transfer takes place in the symmetrical case.
  • Rapier weaving machines with the belt wheel drives according to the invention and the clamp openers according to the invention, with highly dynamic servomotors in particular being used for the servomotors, are particularly suitable if the weaving machines are used by means of control technology, i.e. central computer control.

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

Claims (8)

  1. Procédé pour utiliser un métier à tisser à griffes dans lequel un griffe d'amenée et une griffe de reprise effectuent des déplacements synchronisés en va-et-vient en sens inverse, procédé dans lequel la griffe d'amenée est entraînée par un moteur de positionnement commandé par programme, caractérisé en ce que lors de la transmission du fil au milieu de la foule, la griffe d'amenée est placée dans une phase d'arrêt, en ce que pendant cette phase d'arrêt, la pince de la griffe d'amenée est actionnée par un dispositif d'ouverture de pince commandé par programme, et en ce que le fil de trame est enlevé par la griffe de reprise hors de la pince actionnée de la griffe d'amenée, les paramètres de programmation du dispositif d'ouverture de pince étant déterminés en fonction des propriétés des fils de trame (3) utilisés et de la pince de griffe.
  2. Procédé selon la revendication 1, caractérisé en ce qu'au moins la griffe de reprise (2) présente une pince en biseau, et en ce que le fil de trame est repris automatiquement par cette pince.
  3. Procédé selon la revendication 1, caractérisé en ce que la griffe de reprise est de plus entraînée par un moteur de positionnement commandé par programme, en ce que lors de la transmission du fil, la griffe de reprise est placée dans une phase d'arrêt avant la phase d'arrêt de la griffe d'amenée, et sa pince est ouverte par un dispositif d'ouverture de pince, en ce que le fil de trame est amené par la griffe d'amenée dans la pince ouverte de la griffe de reprise, et en ce qu'ensuite la pince de la griffe de reprise est fermée pendant la phase d'arrêt de la griffe d'amenée, et le fil de trame est enlevé par la griffe de reprise hors de la pince actionnée de la griffe d'amenée.
  4. Procédé selon la revendication 3, caractérisé en ce que lors de la transmission du fil, les deux griffes (1, 2) sont mises à l'arrêt pendant l'ouverture de la griffe d'amenée (1).
  5. Procédé selon la revendication 3 ou 4, caractérisé en ce que l'on commence par l'ouverture de la griffe d'amenée pendant la fermeture de la griffe de reprise.
  6. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif d'ouverture de pince, ou chaque dispositif d'ouverture de pince, est entraîné par un moteur de positionnement commandé par programme.
  7. Métier à tisser en vue de l'exécution du procédé selon la revendication 6, comportant une griffe d'amenée (1), une griffe de reprise (2) et au moins un dispositif (6) d'ouverture de pince commandé par programme, pouvant être entraîné par un moteur de positionnement, situé dans la région du milieu de la foule, et qui est associé à la griffe d'amenée, tandis que les têtes de griffe présentent des leviers d'actionnement (13 ou 23) pour l'ouverture de pince-fil, et au moins la griffe d'amenée peut être entraînée par un moteur de positionnement (5) commandé par programme, tandis que le dispositif (6) d'ouverture de pince ou chaque dispositif d'ouverture de pince est un dispositif qui comprend un mécanisme constitué de deux roues dentées (64a, 64b) de différentes tailles, la petite roue dentée (64b) pouvant être entraînée par le moteur de positionnement associé et la grande roue dentée (64a) étant reliée par l'intermédiaire de l'accouplement (65) à un levier de commande (61), en vue de l'actionnement de la griffe associée au dispositif d'ouverture de pince.
  8. Métier à tisser selon la revendication 7, caractérisé en ce que le moteur de positionnement (5) d'au moins un des entraînements de griffe est un servomoteur à haute dynamique.
EP92810461A 1991-07-24 1992-06-16 Machine à tisser à pinces avec un dispositif d'insertion qui peut être ajusté suivant les caractéristiques de fil Expired - Lifetime EP0526390B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2204/91 1991-07-24
CH220491 1991-07-24

Publications (2)

Publication Number Publication Date
EP0526390A1 EP0526390A1 (fr) 1993-02-03
EP0526390B1 true EP0526390B1 (fr) 1996-09-11

Family

ID=4228330

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Application Number Title Priority Date Filing Date
EP92810461A Expired - Lifetime EP0526390B1 (fr) 1991-07-24 1992-06-16 Machine à tisser à pinces avec un dispositif d'insertion qui peut être ajusté suivant les caractéristiques de fil

Country Status (4)

Country Link
US (1) US5241994A (fr)
EP (1) EP0526390B1 (fr)
JP (1) JPH05195373A (fr)
DE (1) DE59207102D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07331558A (ja) 1994-06-06 1995-12-19 Toyota Autom Loom Works Ltd レピア織機における緯入れ方法及び装置
EP0908547A1 (fr) * 1997-10-07 1999-04-14 Sulzer Rüti Ag Dispositif d'insertion pour un fil de trâme dans un métier à tisser ainsi que métier à tisser equipé d'un tel dispositif
US5990372A (en) * 1998-01-12 1999-11-23 United Catalysts Inc. Adsorbent for the removal of trace quantities from a hydrocarbon stream and process for its use
DE29908543U1 (de) * 1999-05-14 1999-08-12 Lindauer Dornier Gmbh, 88131 Lindau Steuereinrichtung zur Betätigung des Klemmhebels eines Greifers, insbesondere eines Nehmergreifers in Greiferwebmaschinen
SE0300809L (sv) * 2003-03-25 2004-03-02 Texo Ab Anordning vid vävmaskin
EP1637635B1 (fr) * 2004-09-13 2007-10-31 SCHÖNHERR Textilmaschinenbau GmbH Procédé d'entraînement des têtes de pinces d'un métier à pinces et dispositif pour sa mise en oeuvre
BE1019271A3 (nl) * 2010-04-02 2012-05-08 Picanol Nv Aandrijving en werkwijze voor het aandrijven van grijperdragers.
CN103173914A (zh) * 2013-04-15 2013-06-26 广东丰凯机械股份有限公司 引纬传动机构
TWI650456B (zh) 2016-01-28 2019-02-11 耐克創新有限合夥公司 多梭子分區編織系統、方法及材料

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022253A (en) * 1976-05-14 1977-05-10 Barber-Colman Company Rapiers with means for limiting rapier head divergence during weft-yarn transfer
DE2707687A1 (de) * 1977-02-23 1978-08-24 Lentz Textilmaschinen Gmbh Greiferwebmaschine mit einer schusseintragvorrichtung
DD153398A1 (de) * 1980-10-03 1982-01-06 Gunter Jost Greiferstangen-oder greiferbandantrieb einer webmaschine
DE3224708C2 (de) * 1982-07-02 1984-04-26 Florian Dipl.-Ing. 8990 Lindau Windischbauer Einrichtung zur zwangsläufigen Betätigung der Klemmvorrichtung von Schußfadeneintragorganen an schützenlosen Webmaschinen
ES2012386B3 (es) * 1986-06-03 1990-03-16 Picanol Nv Pinza de alimentacion para telares.

Also Published As

Publication number Publication date
EP0526390A1 (fr) 1993-02-03
JPH05195373A (ja) 1993-08-03
DE59207102D1 (de) 1996-10-17
US5241994A (en) 1993-09-07

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