EP0243565B1 - Dispositif d'accumulation de fil de trame pour machine à tisser - Google Patents

Dispositif d'accumulation de fil de trame pour machine à tisser Download PDF

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Publication number
EP0243565B1
EP0243565B1 EP86810317A EP86810317A EP0243565B1 EP 0243565 B1 EP0243565 B1 EP 0243565B1 EP 86810317 A EP86810317 A EP 86810317A EP 86810317 A EP86810317 A EP 86810317A EP 0243565 B1 EP0243565 B1 EP 0243565B1
Authority
EP
European Patent Office
Prior art keywords
thread
weft
winder
supply
weft 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
EP86810317A
Other languages
German (de)
English (en)
Other versions
EP0243565A1 (fr
Inventor
Robert Bucher
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.)
Sulzer AG
Original Assignee
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 Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0243565A1 publication Critical patent/EP0243565A1/fr
Application granted granted Critical
Publication of EP0243565B1 publication Critical patent/EP0243565B1/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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/367—Monitoring yarn quantity on the drum
    • 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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • 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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/364—Yarn braking means acting on the drum

Definitions

  • the invention relates to the working method of a weft thread storage device for presenting weft thread for entry into a weaving machine, weft thread being drawn off from a bobbin and temporarily stored on a drum in several turns in a first winding zone as a first supply by means of a winder and by means of a second winder in a second supply can be transferred in a second winding zone.
  • a weft thread store which works according to this method is known from European patent application 0 145 163. He controls the end of the weft insertion by a thread stopper at the end of the second phase stopping the running of thread loops from a drum after a certain number of thread turns have been removed from the store. The drive for winding thread turns is controlled so that a certain number of thread turns for the weft insertion is provided. In this device, the transfer speed is reduced from the first zone to the second after the weft insertion if the next entry is not to be taken from the same store.
  • a weft thread storage device can measure the weft thread exactly, but its length can only be varied in steps corresponding to a circumferential length of the drum.
  • the end of the weft insertion is determined by the immersion of a finger on the circumference of the drum, as a result of which a tension spike occurs in the weft thread, since its braking is jerky due to the immersion.
  • this object is achieved in that the speed of thread removal from the first supply is reduced before the end of the weft insertion according to a predetermined program, the end of each weft insertion coinciding with a sudden reduction in the thread removal speed and that a thread brake for holding on to the end of the weft insertion the weft thread is actuated before entering the weaving machine.
  • the speed of thread removal can be steadily reduced to zero or only reduced to a value that is low relative to the entry speed.
  • the weft insertion is ended by blocking the thread feed to the weaving machine.
  • the thread transfer from the first supply to the second supply can be carried out at a constant maximum thread speed, or the speed of the thread transfer is continuously increased to a value that results during the weft insertion into the weaving machine when the weft thread is consumed shortly before the second supply is exhausted .
  • the weft thread must be held behind the zone of the second supply formation in the discharge direction. The overall measured weft thread length is checked in the weaving machine after the entry, whereupon the run program for the second winder is adjusted in the event of a deviation from a target value.
  • a weft thread store is used to carry out the method.
  • At least the second winder is connected to a drive which is programmable with regard to the switch-on time and speed and which comprises a controlled electric motor and an associated control.
  • the first winder can be driven independently of the second winder, it only being necessary to ensure that a certain thread supply in the first zone is not undershot.
  • both winders can also be rigidly coupled to one another.
  • the control of the drive of the second winder according to the described method enables a gentle weft insertion, whereby in particular the abrupt braking of the weft thread at the end of the insertion can be avoided, since the second winder can be operated towards the end of the weft insertion with a steadily decreasing angular velocity and the insertion speed of the weft thread is reduced in a controlled manner.
  • the device is also suitable for the insertion of different weft threads on a weaving machine, since the second winder can be switched on in any weaving cycle. If several weft colors are entered, a corresponding number of thread stores must be arranged according to the invention.
  • a first winder 12 with a bearing 126 is freely rotatably mounted in the housing 11 of the weft thread store 1 and is driven by a drive 121, for example a frequency-controlled electric motor, via a drive belt 122.
  • the drive 121 is controlled by the supply sensor 123 via the line 124. If a certain weft thread supply 21 is undershot, the drive 121 is switched on, so that the first winder 12 can pull weft thread 2 from a thread spool (not shown) and wind it up on the circumference of a drum 13 in a first winding zone 135.
  • the drum 13 is mounted on the winder shaft 125 via bearings 131 and 132.
  • a steel insert 134 is located in its interior, which lies in the area of influence of the magnetic field of a magnet 112, the magnet being stationary on an arm 111 with the Ge housing 11 of the weft store 1 is connected.
  • a second winder 14 is rotatably arranged in the housing 11 by means of bearings 142. It can be set with a pulley 141 and a drive belt 143 by an electric motor 144 to rotate about the axis 10 of the weft thread store 1, the weft thread supply 21 being reduced, since the weft thread 2 passes through the eyelet 146 of the second winder 14 to a second winding zone 136 is relocated.
  • the second winder operates until the end of the weft insertion, so that the pulling speed of the weft thread is smoothly decelerated to zero before the weft insertion is finished. To the right of the conical end 133 of the drum 13 in FIG.
  • a thread brake 16 with a conical brake ring 161 which can be displaced axially against the drum 13 and which, when the brake is switched on, can be displaced relative to the housing 162 by means of electromagnets 163 in the direction of the conical end, whereby the weft thread is held in the area of the conical end 133.
  • the brake In the dash-dotted position 161 'of the brake ring 161, the brake is closed.
  • the thread brake 16 may only be switched on after the end of the rotary movement of the take-off winder 14 about the axis 10, since otherwise the weft thread jams between the eyelet 146 and the brake ring 161.
  • the thread brake 16 must also be switched on by the second winder 14 before a new build-up in the second winding zone. Simultaneously with the start of withdrawal of the weft thread from the drum 13, the insertion nozzle 36, which is fastened to the frame 35 of the weaving machine 3, is switched on and the weft thread is inserted into the shed 37 supported by nozzles 39 in the extended position. After the entry, the weft thread is struck against the edge of the fabric 38.
  • a controller 15 which reads the angular position of the main shaft 31 of the weaving machine 3 by means of the reader 33 via the line 34.
  • the controller 15 is connected via the line 145 to a controllable electric motor 144 which controls the second winder 14.
  • the controller 15 has a connection to the sensors 41 to 43 on the catching side of the weaving machine via the lines 44 to 46.
  • the sensors 41 to 43, which scan the position of the weft tip 22, are referred to as entry sensors 4.
  • the controller 15 automatically increases the number of revolutions of the electric motor 144 due to this position of the weft thread tip 22, so that during the next or one of the next unwinding processes, more weft thread is drawn off from the weft thread supply 21 by means of the second winder 14 and accordingly the weft thread tip reaches the middle sensor 42 can. So that the control for the position of the weft thread tip is leveled out quickly after the entry to the sensor 42, a third sensor 43 can be arranged which detects control deviations in the direction of an excessively long weft thread length.
  • the second winder 14 is only switched on at the beginning of a weft insertion period, with the nozzles 36 and 39 functioning simultaneously and the thread brake 16 being open, no weft thread supply can form in the second winding zone due to the rotation of the second winder, since the weft thread 2 is immediately withdrawn.
  • this mode of operation of the second winder it is possible to control the weft insertion in jet weaving machines in a manner similar to that in rapier weaving machines, in that the position of the weft thread tip 22 is known at all times during the insertion by the shed 37. It is thus possible to switch the auxiliary nozzles 39 on or off for the further transport of the weft thread through the shed so that unnecessary air consumption is avoided.
  • first and second winders are in alignment with one another.
  • the first winder is held in the extended position as shown in FIG. 1.
  • the second winder 14 then assumes the position 14 'which is dash-dotted in FIG. 1.
  • the weft thread 2 can then easily be threaded into the eyelet 146 of the second winder 14 from the outlet opening from the first winder 12.
  • a certain thread supply 21 must then be formed by the winder 12 in the first winding zone 135, after which the second winder 14 can then also operate.
  • the drum 13 is secured against rotation by an enlarged steel insert 134 which, due to its gravitational force, prevents the drum 13 from rotating without additional action by a magnet.
  • FIG. 3a shows a drive 144 for the second winder 146, which is particularly low in mass.
  • a ring 147 is embedded in the housing 11 and has electrical windings 148 distributed around the circumference.
  • Magnetic fields are to be generated in the windings by means of the control 15 and the lines 145, which magnetic fields act on an insert 149a made of magnetic material in a rotor 149 which is guided in the ring 147.
  • the magnetic fields thus exert acceleration or deceleration or supporting forces on the rotor 149.
  • the eyelet 146 on the inside of the runner 149 unwinds 21 threads from the first thread supply.
  • the rotor 149 takes the place of the second winder 14 and is driven in the same way.
  • V A means the removal speed of the weft thread from the first supply and is nothing else than the peripheral speed of the second winder, measured on the drum circumference.
  • W the weft thread is inserted into the shed of the machine at the speed V E.
  • V A During a machine cycle Zi or Z 2 , one thread transfer takes place from the first winding zone according to the speed profile V A.
  • the weft insertion period is marked with W.
  • the speed profile V E of the thread running through the nozzle 36 in the direction of the loom 3 corresponds in a first approximation to a rectangle.
  • the steep increase in speed is brought about by the air supply to the nozzles 36, 39, while the sharp decrease in speed occurs towards the end of the entry period because the thread supply in the second winding zone 136 is exhausted.
  • the weft thread is then only entered into the shed 37 at the maximum discharge speed V A.
  • the discharge speed also begins to decrease in accordance with the speed profile V A according to the predetermined program in the controller 15.
  • the discharge speed V A is only reduced to a certain value at the end of the weft thread entry in accordance with the profile in FIG. 4a.
  • the removal speed V A is immediately increased again to a maximum value, as a result of which the second winder 14 in turn begins to build up stocks in the second winding zone 136.
  • 4b shows another possible operating mode for the weft thread store.
  • the removal speed V A ', or the winding speed of the second winder 14 is steadily increased from zero to a value close to the maximum entry speed of the weft thread into the shed 37, as a result of which the sudden drop in speed when the thread supply in the second winding zone 136 is exhausted is less severe than 4a is pronounced in the mode of operation.
  • FIG. 5 shows the joint operation of two weft thread stores on a weaving machine in the so-called mixed change operation.
  • the one store according to the upper diagram in FIG. 5 delivers weft thread into the weaving machine during the cycle Zi; thread is stored again during cycle Z 2 and at the beginning of cycle 7 3 , whereupon weft thread is again drawn off from the first store in cycle Z 3 .
  • the end of the weft insertion coincides with the sudden drop in the thread removal speed V A at the end of a storage process.
  • the second memory, for which the discharge rate V A is shown in the lower diagram stores, during the cycle Z 1 and Z 2 are during the cycle weft yarn starting to turn to store only during the cycle Z. 3
  • Fig. 6 shows the operation of two stores with selective thread withdrawal, that is, with controlled two-shot operation.
  • the first weft store supplies Zi, Z 3 etc. during the machine cycles, while the second weft store supplies 2 yarns according to the diagram below during the cycle Z.
  • the storage of the weft thread extends over one cycle.
  • the discharge speed V A of the first store according to the upper diagram in FIG. 6 is reduced towards the end of the weft insertion period W according to the above explanations to a low value at the end of the weft insertion.
  • the second winder 14 then runs down to the machine rotation angle Wi.
  • the dashed line in the upper diagram in FIG. 6 shows the speed curve when the weft yarn is removed in the first winding zone in the first store, even if Z 2 thread would have to be supplied during the machine cycle. Because the winder 14 in the selected example continues to run up to the machine rotation angle W 1 , the removal speed after switching on the second winder 14 can be increased more slowly from the machine rotation angle W 2 than when the winder stops at the end of the weft insertion period W. According to the second memory below The diagram in FIG. 6 is only in operation for one firing during cycle Z 2 .
  • the speed profile V A for removing the weft yarn corresponds to the profile V A in the upper part of FIG. 6.

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

Claims (11)

1. Procédé d'exploitation d'un dispositif d'accumulation de fil de trame permettant la mise à disposition du fil (2) de trame pour son insertion dans une machine (3) à tisser, dans lequel le fil de trame est dévidé d'une canette et est emmagasiné temporairement, au moyen d'un premier bobinoir (12), en plusieurs tours dans une première zone (135) de bobinage sur un tambour (13), constituant une première réserve (21), et peut être transféré, au moyen d'un deuxième bobinoir (14), vers une deuxième réserve (23) dans une deuxième zone (136) de bobinage, caractérisé par le fait que la vitesse de dévidage du fil de la première réserve (21) est diminuée selon un programme prédéterminé (15) avant la fin de chaque insertion du fil de trame, la fin d'une insertion du fil de trame coïncidant alors avec la réduction abrupte de la vitesse (VA) de dévidage du fil, et par le fait qu'à la fin de chaque insertion du fil de trame, un frein (16) de fil est actionné, qui arrête le fil de trame avant qu'il n'entre dans la machine à tisser.
2. Procédé selon la revendication 1, caractérisé par le fait que la vitesse de dévidage du fil est diminuée progressivement jusqu'à zéro.
3. Procédé selon la revendication 1, caractérisé par le fait que, lors de la diminution de la vitesse de dévidage du fil, l'insertion du fil de trame est arrêtée par l'intermédiaire du blocage (16) de l'alimentation en fil de la machine à tisser.
4. Procédé selon la revendication 1, caractérisé par le fait que la vitesse maximale de transfert du fil de la première réserve (21) vers la deuxième zone (136) de bobinage est maintenue de façon constante jusqu'à sa diminution.
5. Procédé selon la revendication 1, caractérisé par le fait que la vitesse de transfert du fil de la première réserve (21) vers la deuxième zone (136) de bobinage est augmentée jusqu'à une valeur qui est définie, lors de l'insertion du fil de trame, par la consommation du fil de trame, peu avant l'épuisement de la deuxième réserve (23).
6. Procédé selon la revendication 1, 2 ou 3, caractérisé par le fait qu'avant de constituer une nouvelle réserve (23), on arrête le fil de trame après la deuxième zone (136) de bobinage, par rapport au sens du dévidage du fil.
7. Procédé selon la revendication 1, caractérisé par le fait que le dévidage du fil de la première réserve (21) ne commence qu'avec l'insertion du fil dans la machine à tisser.
8. Procédé selon la revendication 1, caractérisé par le fait que la longueur mesurée de fil pour une insertion de fil de trame est contrôlée (4) dans la machine à tisser, et que la longueur requise de fil de trame pour les cycles suivants d'insertion de fil de trame est définie (15) en conséquence.
9. Dispositif d'accumulation de fil de trame pour la mise en oeuvre du procédé selon la revendication 1, qui comporte un tambour (13) sur lequel le fil (2) de trame, destiné à être inséré dans une machine (3) à tisser, peut être accumulé en plusieurs tours dans une première zone (135) de bobinage, cette zone étant suivie d'une deuxième zone (136) de bobinage, et qui comporte ensuite un premier bobinoir (12) pour la première zone de bobinage et un deuxième bobinoir (14) pour la deuxième zone de bobinage, ainsi qu'un frein (16) de fil destiné à arrêter le fil de trame avant son introduction dans la machine (3) à tisser, caractérisé par le fait que le premier bobinoir (12) peut être mû indépendamment du deuxième bobinoir (14).
10. Dispositif d'accumulation de fil de trame selon la revendication 9, caractérisé par le fait qu'au moins le deuxième bobinoir (14) comporte un dispositif moteur (144) dont la mise en marche et le nombre de tours sont programmables et qui est composé d'un moteur électrique (144) piloté et d'un système (15) de commande correspondant.
11. Dispositif d'accumulation de fil de trame selon la revendication 10, caractérisé par le fait que le moteur électrique (144) est constitué d'une couronne (147) portant des bobines électriques (148), et d'un rotor (149) guidé dans la couronne et pourvu d'une garniture (149a) en une matière magnétique, le rotor (149) muni d'un oeillet (146) pouvant tourner, le long de la couronne (147), autour du tambour.
EP86810317A 1986-04-29 1986-07-15 Dispositif d'accumulation de fil de trame pour machine à tisser Expired - Lifetime EP0243565B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1754/86A CH669621A5 (fr) 1986-04-29 1986-04-29
CH1754/86 1986-04-29

Publications (2)

Publication Number Publication Date
EP0243565A1 EP0243565A1 (fr) 1987-11-04
EP0243565B1 true EP0243565B1 (fr) 1990-04-18

Family

ID=4217779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810317A Expired - Lifetime EP0243565B1 (fr) 1986-04-29 1986-07-15 Dispositif d'accumulation de fil de trame pour machine à tisser

Country Status (5)

Country Link
US (1) US4799517A (fr)
EP (1) EP0243565B1 (fr)
JP (1) JPS62263350A (fr)
CH (1) CH669621A5 (fr)
DE (1) DE3670516D1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1001188A3 (nl) * 1987-11-12 1989-08-08 Picanol Nv Werkwijze voor het regelen van de toevoer van inslagdraad bij weefmachines en inrichting die deze werkwijze toepast.
IT1217339B (it) * 1988-02-11 1990-03-22 Roy Electrotex Spa Alimentatore di filo per macchine tessili
EP0330951B1 (fr) * 1988-03-02 1992-01-29 L.G.L. ELECTRONICS S.p.A. Dispositif alimenteur de fil, en particulier pour métiers à tisser
US5343899A (en) * 1990-03-12 1994-09-06 Iro Ab Output yarn brake
US5261586A (en) * 1992-03-26 1993-11-16 Chen Jen Fu Yarn feeding device with a guiding flange
NL9200848A (nl) * 1992-05-14 1993-12-01 Rueti Inrichting voor het sturen van de garenloop tussen een stationair garenpakket en een periodiek werkende garen-verwerkende inrichting.
DE4219306A1 (de) * 1992-06-12 1993-12-16 Iro Ab Verfahren und Vorrichtung zum Liefern von Schußfäden
DE9406102U1 (de) * 1994-04-13 1995-08-10 Sobrevin Société de brevets industriels-Etablissement, Vaduz Fadenspeicher mit Fadenabzugsbremse
IT1268111B1 (it) * 1994-10-10 1997-02-20 Lgl Electronics Spa Dispositivo di frenatura modulata positiva del filato, per apparecchi alimentatori di trama
US5546994A (en) * 1994-10-14 1996-08-20 Sobrevin Societe De Brevets Industriels-Etablissement Thread storage drum with frustoconical brake strip
US5669245A (en) * 1996-03-08 1997-09-23 Shieh; Meei-Ju Yarn feeding device of a circular knitting machine
DE19613055A1 (de) 1996-04-01 1997-10-02 Iro Ab Axiale Scheibenbremse und Fadenliefergerät mit axialer Scheibenbremse
DE19839272B4 (de) * 1997-09-11 2007-02-01 Iro Sweden Ab Steuerbare Fadenbremse
IT201700113434A1 (it) * 2017-10-10 2019-04-10 Lgl Electronics Spa Metodo di controllo del consumo di filato in un processo di tessitura
CN109455574A (zh) * 2018-12-05 2019-03-12 大连英蕴科技有限公司 一种海洋工程用线缆回收设备及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2821725C2 (de) * 1978-05-18 1980-05-08 Ab Iro, Ulricehamn (Schweden) Fadenspeicher- und -liefervorrichtung
FR2478144A1 (fr) * 1979-08-06 1981-09-18 Leesona Corp Systeme d'alimentation et d'insertion d'un fil de trame dans un metier a tisser
EP0084032B1 (fr) * 1981-07-14 1988-09-21 Sulzer Brothers Limited Dispositif de mesure du fil de trame
JPS5891849A (ja) * 1981-11-25 1983-05-31 株式会社豊田中央研究所 ジエツトル−ム用緯糸貯留装置
US4627474A (en) * 1982-09-03 1986-12-09 Aktiebolaget Iro Yarn storing, feeding and measuring device
GB8327676D0 (en) * 1983-10-15 1983-11-16 Bonas Machine Co Yarn metering device

Also Published As

Publication number Publication date
JPS62263350A (ja) 1987-11-16
CH669621A5 (fr) 1989-03-31
EP0243565A1 (fr) 1987-11-04
DE3670516D1 (de) 1990-05-23
US4799517A (en) 1989-01-24

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