EP0268550B1 - Tendeur de fils pour machine textile - Google Patents

Tendeur de fils pour machine textile Download PDF

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Publication number
EP0268550B1
EP0268550B1 EP19870810518 EP87810518A EP0268550B1 EP 0268550 B1 EP0268550 B1 EP 0268550B1 EP 19870810518 EP19870810518 EP 19870810518 EP 87810518 A EP87810518 A EP 87810518A EP 0268550 B1 EP0268550 B1 EP 0268550B1
Authority
EP
European Patent Office
Prior art keywords
deflecting element
thread
lamella
air
yarn
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
EP19870810518
Other languages
German (de)
English (en)
Other versions
EP0268550A1 (fr
Inventor
Anton Egloff
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 EP0268550A1 publication Critical patent/EP0268550A1/fr
Application granted granted Critical
Publication of EP0268550B1 publication Critical patent/EP0268550B1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/28—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged towards each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/11—Actuating means linear pneumatic, e.g. inflatable elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a device for tensioning a thread to be presented to a textile machine, according to the preamble of claim 1.
  • Such a device is used for example on weaving machines in which the weft thread is inserted into the shed by means of a gripper. To tension the thread, it is deflected from its normal running direction, for example by a spring-loaded lever, before it is guided by a deflection element in a direction outside the effective range of the lever.
  • a deflection element in a direction outside the effective range of the lever.
  • CH-PS No. 182 692, Fig. 17 Such an arrangement is known from CH-PS No. 182 692, Fig. 17.
  • the movement of the lever can partially compensate for fluctuations in consumption of the thread entering the textile machine.
  • the repeated deflection of the thread in the area of the tensioning device also results in a braking effect, as a result of which the thread can only be drawn off in the direction of travel after the tensioning device while overcoming a certain braking force.
  • Tensioning devices of the type described are used in numerous embodiments on various textile machines.
  • the known devices have the disadvantage that the thread is strongly deflected in the tensioning device, whereby the frictional stress on the thread can possibly become too great.
  • a certain system inertia for example due to the lever mass, the mass of a spring element, the bearing friction in the lever bearing, must also be overcome, so that strong fluctuations in tension can occur in the event of very short consumption fluctuations of the thread.
  • the thread can either be stretched too much for a short time, or it falls below a predetermined minimum tension if the tensioning device does not respond quickly enough in the deflection direction. In both cases, this can lead to malfunctions in the textile machine.
  • the weft thread When weaving weft yarn in rapier weaving machines, the weft thread is subject to strong fluctuations in consumption during the entry due to the discontinuous movement sequences. For example, the weft thread is drawn into the center of the shed by a rapier gripper and handed over to a slave rapier there. Such a slave gripper is described in U.S. Patent No. 4,062,382.
  • the weft thread When the weft thread is transferred from the donor gripper into the hook of the above mentioned gripper gripper, the weft thread first slides over the outer edge of the hook before it can slide into the mouth of the hook via the hook tip. After the weft thread has slid into the hook mouth, the thread is slightly relaxed before it is firmly gripped by the hook.
  • FIGS. 19 and 20 of the already mentioned CH-PS 182 692 A tensioning device which reacts quickly to fluctuations is shown in FIGS. 19 and 20 of the already mentioned CH-PS 182 692, where a force field exciting the thread is generated by means of an air flow.
  • Such a thread tensioner is disadvantageous because of poor force transmission between the air flow and the thread compared to a device in which the thread is tensioned by means of a deflection element.
  • the force field can be built up by compressed air flowing against the deflection element on one side, the space between the outlet opening of the air and the lamella being advantageously shielded as completely as possible so that the compressed air losses remain small.
  • the force field can also be generated by electromagnetic or electrostatic means.
  • the deflection element is formed, for example, by a curved lamella fastened on one side to a base plate, which is guided through plates on its narrow sides and which can come into contact with the weft thread on the convex part of its long side.
  • the weft thread is advantageously guided through eyelets in front of and behind the slat, so that the thread deflection is limited due to the position of the slat on the thread area between the eyelets.
  • the selected arrangement ensures that the thread tensioner reacts very quickly to changes during the thread run.
  • the weft thread 2 runs from the weft thread store 1 in the direction of the arrow 2 ⁇ into the thread tensioner 3 and from there through the eyelet of the weft thread selector 4 to the gripper 5.
  • a gripper is described in US Pat. No. 4,071,055. Its function is therefore not explained further here.
  • the rapier gripper 5 takes over the weft thread 2 by moving it along the stop line 13 into the shed 11 formed by the warp threads 7 and 8. Before the carrier gripper 5 enters the shed 11, the weft thread 2 is cut by the scissors 9.
  • the rapier gripper pulls the weft thread into the shed 11 according to arrow 52 up to position 5 ⁇ , where the take-up rapier 6 takes over the weft thread tip 21 from the rapier gripper 5 in position 6 ⁇ and is withdrawn according to directional arrow 62 until it emerges from the shed 11 with the scissors 10 .
  • the weft thread tip 21 is released and clamped by the edge warp threads 71.
  • the weft thread should be kept under as constant a tension as possible, so that no transfer errors occur from the weft thread selector 4 to the gripper 5, from the gripper 5 to the gripper 6.
  • the tension in the weft thread should remain constant even after it has been released by the slave gripper 6 until it touches the stop line 13, which is necessary in order to achieve a uniform fabric image. As indicated at the beginning, strong fluctuations in the weft thread speed occur during the weft insertion. When transferring the weft thread from the hook to the The pick thread comes to a standstill, the weft even has to be pulled back a little.
  • the thread tensioner 3 is used to keep the thread tension constant and to retract the weft thread 2 slightly, the structure of which can be seen in detail in FIG. 2.
  • the thread tensioner 3 consists essentially of a plate 36 fastened on the base plate 31 by means of the screw 39 and guided laterally between side plates 32 and 33.
  • the lamella Under the action of the air flowing out of the bore 36 according to arrow 37, the lamella is pressed against the weft thread 2, which runs through the eyelets 341 and 351 in the end plates 34 and 35.
  • the degree of weft deflection within the thread tensioner and thus its tension during the entry can be achieved by regulating the air supplied.
  • the free end of the lamella 36 moves essentially within the trough 30.
  • the shape of the lamella 36, the position of the trough 30 and the side plates 32 and 33 make the air flowing out of the bore 37 flow freely between the plates 32 and 33 hindered, which results in a reasonably low air consumption.
  • the inside of the thread tensioner is kept free of deposits by the outflowing air.
  • the air required in the thread tensioner 3 can be used, for example, as exhaust air from the suction device 40 on the catching side 16.
  • the air acts directly on the weft thread without a deflection element, the weft thread is only minimally stressed by the air currents.
  • the lamella 36 is from above by the weft thread and gravity due to its own mass as well as kept below in balance by the force field of the air flowing against them.
  • the slat is designed with as little mass as possible so that it can react quickly to changes in the weft thread.
  • a force field can also be applied to the lamella in another way, for example by an electromagnetic field.
  • a permanent magnet or electromagnet is arranged above a lamella made of magnetizable material.
  • the lamella 36 is advantageously produced from plastic, for example from carbon fiber-reinforced synthetic resin.
  • the lamella 36 is pressed, for example, into the dashed position 362, the lamella having its back against a bolt 70 fastened transversely in the side plates 32, 33 and the weft thread 2, in FIG. 2 is drawn in the dash-dotted position 22, is clamped between the lamella 362 and the bolt 70, so that no weft thread can be retightened from the right.
  • the lamella 36 is designed to be flexible, it is curved by the bolt 70, as a result of which the weft thread 2 is retracted further in the area to the left of the bolt 70 in FIG. 2, without 1 thread being able to be drawn from the weft thread store.
  • the interaction of the lamella 36 with the bolt 70 makes it possible to work with a particularly low weft thread tension.

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

Claims (8)

  1. Dispositif tendeur d'un fil (2) devant être dirigé sur une machine textile, un élément de déviation (36) agissant sur le fil (2) en le déviant perpendiculairement à son trajet (2'), caractérisé en ce que l'élément de déviation (36) est déplaçable sous l'action d'un champ de force et en ce que l'élément de déviation (36) consiste en une lamelle incurvée et à faible masse qui est fixée d'un côté sur une plaque d'assise (31).
  2. Dispositif selon la revendication 1 comprenant un raccord d'arrivée d'air (37), l'orifice de sortie de l'air étant dirigé sur l'élément de déviation (36) de manière qu'il se produise à l'arrivée d'air un champ d'écoulement qui forme le champ de force s'exerçant sur l'élément de déviation.
  3. Dispositif selon la revendication 2, comprenant des plaques latérales (32, 33) de guidage latéral de l'élément de déviation (36).
  4. Dispositif selon la revendication 3, caractérisé en ce qu'un espace est délimité entre la plaque d'assise (31) et la lamelle (36), d'une part, et les plaques latérales (32, 33) d'autre part et l'air ne peut s'échapper de cet espace que par des interstices séparant la lamelle (36) et les plaques (31, 32, 33) qui lui sont contiguës.
  5. Dispositif selon la revendication 1, caractérisé par des oeillets (341, 351) de guidage du fil qui sont disposés devant et derrière l'élément de déviation (36) par rapport au sens de l'avance du fil (2').
  6. Dispositif selon la revendication 1, caractérisé en ce que la course de déviation de l'élément correspondant (35) est limitée par une butée (70), le fil de trame (2) étant immobilisé par serrage lorsque l'élément de déviation (36) s'applique contre la butée (70).
  7. Dispositif selon la revendication 1, caractérisé en ce que l'élément de déviation (36) est réalisé de manière à être flexible.
  8. Dispositif selon la revendication 1, caractérisé en ce que l'élément de déviation (36) est réalisé en matière plastique armée de fibres de carbone.
EP19870810518 1986-10-20 1987-09-08 Tendeur de fils pour machine textile Expired - Lifetime EP0268550B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH417286 1986-10-20
CH4172/86 1986-10-20

Publications (2)

Publication Number Publication Date
EP0268550A1 EP0268550A1 (fr) 1988-05-25
EP0268550B1 true EP0268550B1 (fr) 1991-12-11

Family

ID=4271144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870810518 Expired - Lifetime EP0268550B1 (fr) 1986-10-20 1987-09-08 Tendeur de fils pour machine textile

Country Status (3)

Country Link
EP (1) EP0268550B1 (fr)
JP (1) JPS63105148A (fr)
DE (1) DE3775180D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0640603Y2 (ja) * 1988-08-09 1994-10-26 日産テクシス株式会社 緯糸引き通し装置を備えた織機の緯糸テンサ装置
DE58908655D1 (de) * 1988-08-25 1995-01-05 Rueti Ag Maschf Verfahren zum Vermeiden von Spannungsspitzen eines Schussfadens beim Schusseintrag während des Bremsvorganges.
BE1009297A3 (fr) * 1993-04-16 1997-02-04 Nissan Texsys Co Ltd Systeme d'insertion de trame pour metier a jet de fluide.
GB2283762B (en) * 1993-11-11 1997-03-26 Fabio Botturi Yarn feeding device for a loom
BE1007898A3 (nl) * 1993-12-22 1995-11-14 Picanol Nv Inrichting voor weefmachines.
DE19605844A1 (de) * 1996-02-16 1997-08-21 Iro Ab Vorrichtung zum Umlenken eines Fadens
DE102010047031B4 (de) * 2010-09-30 2012-08-02 Honigmann Industrielle Elektronik Gmbh Tänzervorrichtung
CZ2019651A3 (cs) * 2019-10-21 2021-04-28 Rieter Cz S.R.O. Způsob pohonu mechanického prvku obsahujícího přízový záchyt na textilním stroji, zařízení pro pohyb přízí na textilním stroji a textilní stroj

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH182692A (de) * 1934-01-17 1936-02-29 Tefag Textil Finanz Ag Verfahren und Vorrichtung zur Regelung der Schussfadenspannung bei Webstühlen, insbesondere bei solchen mit Greiferwebschützen.
FR2352086A1 (fr) * 1976-05-17 1977-12-16 Saurer Diederichs Sa Dispositif pour retendre un fil de trame au devidage dans une machine a tisser sans navette
FR2466548A1 (fr) * 1979-09-27 1981-04-10 Cretin Louis Atel Dispositif de retirage de trame apres insertion, pour une machine a tisser avec reserve de trame fixe
JPS5940721A (ja) * 1982-08-30 1984-03-06 Sony Tektronix Corp デジタル・アナログ変換器用診断装置

Also Published As

Publication number Publication date
EP0268550A1 (fr) 1988-05-25
DE3775180D1 (de) 1992-01-23
JPS63105148A (ja) 1988-05-10

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