EP1401751B1 - Grappin pour fil - Google Patents

Grappin pour fil Download PDF

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Publication number
EP1401751B1
EP1401751B1 EP02701276A EP02701276A EP1401751B1 EP 1401751 B1 EP1401751 B1 EP 1401751B1 EP 02701276 A EP02701276 A EP 02701276A EP 02701276 A EP02701276 A EP 02701276A EP 1401751 B1 EP1401751 B1 EP 1401751B1
Authority
EP
European Patent Office
Prior art keywords
thread
gripping
gripping element
armature
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
EP02701276A
Other languages
German (de)
English (en)
Other versions
EP1401751A2 (fr
Inventor
Björn Halvarsson
Patrik Magnusson
Anders SVANSTRÖM
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.)
Iropa AG
Original Assignee
Iropa 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 Iropa AG filed Critical Iropa AG
Publication of EP1401751A2 publication Critical patent/EP1401751A2/fr
Application granted granted Critical
Publication of EP1401751B1 publication Critical patent/EP1401751B1/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
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/088—Clamping device
    • 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 thread gripper specified in the preamble of claim 1. Art.
  • Such thread grippers (EP-A 0 756 028), for example, in the thread path between a so-called loop memory and a textile machine.
  • a weaving machine, or on a water jet loom used to set the thread under tension between shots and each release to a webtaktjanen time to entry.
  • cam-driven thread grippers US Pat. No. 3,181,569 A, FR 891 832
  • magnetically open thread grippers are known (US Pat. No. 4,351,370 A, WO96 / 27038 A), in which the armature of the magnet releases the second gripping element from the first gripping element, in order to reach the release the thread held there to movement.
  • the armature of the switching magnet is coupled to the gripping element in such a way that the gripping element and the armature of the switching magnet start the opening movement together.
  • the thread begins to move as soon as the contact pressure of the thread clamping surfaces is reduced to such an extent that the tension prevailing in the thread is able to overcome the frictional force of the thread on the thread clamping surfaces. In the thread release position, the thread runs through virtually without contact with the thread clamping surfaces.
  • yarn gripper In a cam-driven in the opening and closing direction yarn gripper according to US 4,192,357 A is in the gripping position between an opening plunger and the second gripping element before a game.
  • the contact pressure between the gripping elements generating spring to relieve the second gripper before he brings the gripping element on the release position in the open position after driving through the game.
  • the contact pressure gradually degraded and only subsequently ⁇ end the gripping element are brought into the open position, it is difficult to adjust the thread release time exactly and reproducible in standing under train thread.
  • the invention has for its object to provide a thread gripper of the type mentioned, which is characterized by an exactly predeterminable thread release time.
  • the second gripping member Only after the armature has consumed the game between the armature and the second gripping member in their caused by energizing the magnet movement, the second gripping member is taken.
  • the second gripping element performs the movement from standstill to the release position very quickly, for example, in a few milliseconds, so that no more sliding transition results, but a sharp and precisely defined, exactly reproducible release time for the thread.
  • Such a switching magnet is characterized in that it has a relatively accurately predeterminable opening force curve, which at most in the acceleration phase by external influences varies, while the part of the opening curve in which a relatively constant speed or constant acceleration is reached, for example, with their gradient exactly is predictable.
  • a second switching magnet and / or a return spring or a permanent magnet may be provided.
  • a second switching magnet has the advantage that it can be de-energized when energizing the first solenoid or shortly before and generates no more disruptive force
  • a permanent magnet which adjusts the valve in the gripping position so that the predetermined clearance is given again for the next opening stroke, can be used profitably for the benefit of a snap movement in the acceleration of the valve.
  • This snap effect allows a precisely predeterminable acceleration phase of the valve to be achieved, in which even varying external influences no longer have a noticeable effect.
  • the principle of the invention is preferably applied to a yarn gripper of the plate principle, the yarn clamping surfaces cooperate annularly, wherein the thread passes between the thread clamping surfaces and at least approximately passes through the central axis.
  • Annular thread clamping surfaces lead to a large clamping area for the thread.
  • the circular ring surfaces can be flat or structured or curved. This does not exclude, however, other forms of thread clamping surfaces and / or differently shaped gripping elements, e.g. Slats or the like to use.
  • a low-friction, clean telescopic guide of the second gripping element is thereby achieved with a cup shape and a guide tube of the pot bottom in the middle passing through shaft of the valve with the driver arranged thereon secures a central power transmission without lateral forces.
  • the game can be provided between the driver fixed to the shaft and the bottom of the pot, or alternatively between the driver and a stop on the shaft. In any case, it is ensured that the fitting first moves over the game to a relatively constant speed and / or acceleration before it interacts mechanically with the second gripping element and entrains it in the opening direction.
  • the tube may also take over the task of guiding the spring responsible for the gripping position.
  • the spring engages the back of the thread clamping surface of the second gripping element, the contact pressure responsible for the gripping position is transmitted directly where it is passed to the thread.
  • the first gripper adjustable In order to adjust the gripping position and the contact pressure for different yarn qualities and / or yarn strengths or different tensile forces in the thread, it is expedient to arrange the first gripper adjustable and / or to make the voltage before the spring adjustable.
  • the thread gripper is preferably used in an entry system for triggering each of the weaving machine clock-dependent entry start, in which a special thread storage device is provided which presents the entry system several turns of thread in a tubular wound configuration without any inner support, such as DE 100 51 635. Since the turns of thread From the beginning of the entry due to a lack of internal support essentially balloon-free and can be registered very quickly, a precise predeterminable and adapted to the weaving machine clock release time in the thread gripper is advantageous to ensure optimal entry conditions and short entry times.
  • Fig. 1 is an opening diagram of a conventional yarn gripper is shown, in which the second gripper element G2 begins the opening movement together with its actuator.
  • the stroke S is plotted on the vertical axis, and the time t on the horizontal axis.
  • the upper horizontal line G1 / G2 represents the positions of the stationary first gripping member G1 and the second gripping member G2 in the gripping position.
  • the lower horizontal line F / G2 represents the position of the second gripping member in the opening stroke at the thread release timing. Since the gradient of the opening curve A increases gradually over the acceleration phase, is still relatively flat when intersecting with the lower horizontal line F / G2, and a relatively constant velocity and / or acceleration occurs later, the opening curve A shown in FIG lower horizontal line at a very small angle.
  • Variable friction conditions, temperature conditions, wear, spring fatigue, and the like may change the acceleration phase so that the gradient of the opening curve increases more (lower dashed part A2) or weaker increases (upper dashed part A1) than in the solid line open curve ,
  • Fig. 2 is the opening diagram for a yarn gripper G according to the invention in Fig. 3.
  • the upper horizontal line G1 / G2 represents the positions of the first and second gripping member in the gripping position.
  • the lower horizontal line F / G2 represents the position of the second gripping element G2 at the release time F, ie, as soon as the contact pressure is reduced to such an extent that the prevailing draft in the thread sets it in motion.
  • A is the opening curve of the actuator.
  • B is the opening curve of the second gripping element G2, which coincides with the curve A from the time X.
  • the adjusting element initially executes its acceleration phase without movement of the second gripping element, for example until the adjusting element has reached a substantially constant speed.
  • Unavoidable external influences upper and lower sides Curve parts A1, A2 then no longer have any influence if the actuating element takes the second gripping element G2 after passing through the clearance H (curve B).
  • the result is the exactly defined release time F at t0, when the common opening curve A, B intersects the lower horizontal line F / G2 very steeply.
  • the entire opening movement of the second gripper G2 takes place at a higher speed and along a very steep curve part, resulting in the precisely defined release time F results.
  • Varying external influences (frictional forces, spring fatigue, temperature influences and the like) no longer affect the release time during the rapid movement of the second gripping element.
  • the gripping position is shown, in which a yarn Y, which is under a pulling action Z in the direction of an arrow, fixed motionless.
  • the thread path defining thread guide elements 2, 3 are arranged.
  • a stationary gripper element G1 is fixed to a support projection 5.
  • the position of the first gripper element G1 can be adjusted by means of a threaded bore 4.
  • an annular, in this embodiment, flat, thread clamping surface K1 is provided on the underside of the first gripping element G1 .
  • the second gripping element G2 works together with the first gripping element G1. This is formed in the manner of a plate with a likewise annular thread clamping surface K2.
  • the plate is formed by a flange 6 at the free opening edge of a pot 7, which is slidably guided in a tube 9.
  • a sliding guide 10 may be interposed therebetween.
  • the designated 8 pot bottom is broken and forms with its top a stop 15.
  • the stop 15 is formed by a damping element 16 on the bottom of the pot 8.
  • a spring 11 is guided, which is supported stationary and acts with its upper end, the rear side of the flange 6.
  • the bias of the spring 11 can be adjusted.
  • a solenoid M On the underside of the housing 1, a solenoid M is arranged, which includes a coil 111 and an internal armature 12, which is pulled upon energization of the coil 11 from the raised position shown downward. With the armature 12, a shaft 13 is connected, which passes through the bottom of the pot 8 and inside the pot. 7 carries a driver 14. In the gripping position shown, the thread clamping surfaces K1, K2 are pressed together by the spring 11 so that the yarn Y is prevented from moving. The armature 12 is in the position shown, in which between the driver 14 and the stop 15 a game H is set. For a more than about 6.5 mm adjustable gripper element G2 game H can be about 2.0 mm.
  • the extent of the clearance H seen in the opening direction corresponds, for example, to the adjusting stroke of the carrier 14 from standstill, with the exception of a substantially constant speed and / or acceleration. That is, the driver 14, the acceleration phase of the valve 12 with gradually increasing speed within the game H performs before the driver 14 meets the stop 15 and the second gripping member G2 in Fig. 3 moves down towards the full open position of the yarn gripper.
  • the contact pressure between the yarn clamping surfaces K1, K2 is reduced very rapidly until the tensile force in the yarn Y is sufficient to move it to the yarn release time. Thereafter, the second gripping element G2 is further adjusted to the full open position of the thread gripper.
  • the shaft 13 may be mounted in a sliding guide 20, e.g. a graphite bush, run, for good centering.
  • a centering slide 21 could be provided for the armature 12.
  • the armature 12 could be guided with an extension in the lower, stationary iron core of the solenoid M.
  • the solenoid M presses the thread clamping surfaces K1, K2 against each other again to set the Y yarn.
  • the valve 12 is taken up.
  • a second solenoid 17 is provided which performs the adjustment of the valve 12 in the position shown in Fig. 3, and / or an indicated return spring 19.
  • the return spring 19 could also be provided between the stop 15 and the driver 14. It would also be conceivable to provide in the cavity in the first gripping element G1 a magnet which pulls the driver 14 into the position shown in FIG. 3, or even better at least one small permanent magnet 18 in the housing 1 adjacent to the valve 12.
  • the permanent magnet 18 can be used profitably to accelerate the valve in a snap movement before it encounters the second gripping element G2.
  • the operating force of the solenoid M builds up gradually.
  • the holding force of the permanent magnet 18 for the armature 12 depends strongly on the gap width and drops sharply as the gap width increases.
  • the switching magnet first builds up an actuating force, which must first overcome the holding force of the permanent magnet, before the armature 12 receives its movement. Thanks to the already high operating force of the solenoid M and the then abruptly degrading holding force of the permanent magnet 18 at this time, the desired snap action results in a precisely predeterminable acceleration phase for the valve 12.
  • the valve 12 then hits in an already relatively steep Publ tion curve on the second gripping element which is moved away from the standstill rapidly over the position in which the yarn Y is released. In this way, outer varying influences affect neither the acceleration phase of the armature 12 nor the opening phase of the second gripping element G2 appreciably.
  • the play H between the driver 14 and a shaft 13 provided above stop 15 may be provided.
  • the driver 14 is permanently on the bottom of the pot 8, while the stop provided on the shaft 13 is offset by the game H upwards.
  • the armature 12 is pulled down and initially accelerated to a relatively constant speed before the stop on the shaft 13 meets the driver 14 and this entrains the second gripping member G2.
  • a return spring could be used between the driver 14 and the stop on the shaft 13, a return spring could be used.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)

Abstract

L'invention concerne un grappin pour fil (G) comprenant un premier élément de préhension (G1) fixe portant une surface de serrage de fil (K1) et un second élément de préhension (G2) portant une surface de serrage de fil (K2), dont les surfaces de serrage de fil (K1, K2) peuvent être comprimées l'une contre l'autre avec une pression de contact ajustable dans une position de préhension maintenant les fils (Y) entre elles, ainsi qu'un élément de réglage (S) pouvant être entraîné hors d'une position de repos, au moins dans un mouvement d'ouverture, qui peut être mis en prise sur le second élément de préhension et déplace les surfaces de serrage de fil en passant par une position de libération de fil, à un moment de libération du fil, jusqu'à ce que le grappin de fil (G) se trouve en position ouverte. En position de préhension du grappin de fil, il est prévu entre l'élément de réglage (S) et le second élément de préhension (G2), une course à vide correspondant dans le sens du mouvement d'ouverture sensiblement à la course de l'élément de réglage pendant sa phase d'accélération entre l'état au repos et une vitesse au moins sensiblement constante et/ou une accélération constante.

Claims (7)

  1. Pince de fil (G) avec un premier élément de pince (G1) qui est stationnaire et qui porte une surface de serrage de fil (K1), avec un second élément de pince (G2) qui est mobile et qui porte une surface de serrage de fil (K2), les surfaces de serrage de fil (K1, K2) étant aptes à être pressées l'une contre l'autre par au moins un ressort (11) avec une pression de contact réglable, dans une position de pince qui tient le fil entre lesdites surfaces de serrage, et avec un élément de réglable (S) qui est apte à être entraîné à partir de l'arrêt, avec un mouvement d'ouverture, qui est apte à être mis en contact avec le second élément de pince (G2) mécaniquement et qui déplace la surface de serrage de fil (K2) de celui-ci par rapport à la surface de serrage de fil (K1) du premier élément de pince jusqu'à une position ouverte de la pince de fil (G), en passant par une position de libération de fil, l'élément de réglage (S) étant constitué par une armure (12) d'un aimant de commutation (M), caractérisée en ce que dans la position de pince, il est prévu entre l'armure (12) et le second élément de pince (G2) un jeu (H) qui correspond essentiellement, dans le sens de mouvement d'ouverture, à la course de l'armure (12) pendant sa phase d'accélération de l'arrêt jusqu'à une vitesse au moins sensiblement constante et/ou une accélération constante.
  2. Pince de fil selon la revendication 1, caractérisée en ce qu'un autre aimant de commutation (17) et/ou un ressort de rappel (19) ou un aimant permanent (18) pour l'armure (12) sont prévus pour former dans la position de pince de la pince de fil (G) le jeu (H) entre l'armure (12) et le second élément de pince (G2).
  3. Pince de fil selon la revendication 2, caractérisée en ce que, entre l'armure (12) entraînée dans le sens de mouvement d'ouverture et l'aimant permanent (18) agissant en sens inverse sur l'armure (12), un mouvement d'enclenchement de l'armure (12) qui renforce le gradient de la courbe d'ouverture (A) jusqu'à épuisement du jeu (H) est réglable.
  4. Pince de fil selon la revendication 1, caractérisée en ce que le second élément de pince (G2) a la forme d'un godet, présente une surface de serrage de fil (K2) disposée dans la zone du bord libre du godet et est guidé dans un tube (9), en ce que l'armure (12) traverse avec une tige (13) le fond (8) du godet et porte dans la zone libre de l'extrémité de la tige un organe d'entraînement (14), et en ce que le jeu (H) est réglé entre l'organe d'entraînement (14) et une butée (15) prévue sur le fond (8) du godet ou une butée prévue sur la tige (13).
  5. Pince de fil selon la revendication 4, caractérisée en ce qu'il est prévu entre l'organe d'entraînement (14) et le raccordement (15) un élément amortisseur (16).
  6. Pince de fil selon la revendication 4, caractérisée en ce qu'il est prévu dans le tube (9) un guidage coulissant (10) pour le second élément de pince (G2).
  7. Pince de fil selon la revendication 4, caractérisée en ce que le contact (11) qui règle la pression de contact est guidé sur l'extérieur du tube (9) et s'appuie contre le côté arrière de la surface de serrage de fil (K2).
EP02701276A 2001-02-16 2002-02-13 Grappin pour fil Expired - Lifetime EP1401751B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10107311 2001-02-16
DE2001107311 DE10107311A1 (de) 2001-02-16 2001-02-16 Fadengreifer
PCT/EP2002/001513 WO2002066354A2 (fr) 2001-02-16 2002-02-13 Grappin pour fil

Publications (2)

Publication Number Publication Date
EP1401751A2 EP1401751A2 (fr) 2004-03-31
EP1401751B1 true EP1401751B1 (fr) 2006-05-03

Family

ID=7674310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02701276A Expired - Lifetime EP1401751B1 (fr) 2001-02-16 2002-02-13 Grappin pour fil

Country Status (5)

Country Link
EP (1) EP1401751B1 (fr)
CN (1) CN1302167C (fr)
AU (1) AU2002234633A1 (fr)
DE (2) DE10107311A1 (fr)
WO (1) WO2002066354A2 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004036996B3 (de) 2004-07-30 2005-12-01 Lindauer Dornier Gmbh Duesenwebmaschine, insbesondere Luftdüsenwebmaschine, mit einer Klemmeinrichtung im Mischrohr
DE102006025968B3 (de) 2006-06-02 2007-11-29 Lindauer Dornier Gmbh Verfahren zum Klemmen eines Schussfadens in einer Düsenwebmaschine, insbesondere Luftdüsenwebmaschine, Klemmeinrichtung und Düsenwebmaschine
JP2008247560A (ja) * 2007-03-30 2008-10-16 Murata Mach Ltd 張力付与装置
WO2008154967A1 (fr) * 2007-06-21 2008-12-24 SSM Schärer Schweiter Mettler AG Porte-fil
EP2388361A1 (fr) * 2010-05-18 2011-11-23 Textilma AG Poignée et dispositif d'entrée de fils de trame pour un métier à tisser à pince
CN103668757B (zh) * 2013-12-18 2015-12-02 海宁市万路针织有限公司 一种五指袜袜机上的导纱架
CN103774340B (zh) * 2014-01-29 2016-06-01 汕头市连兴实业有限公司 全电脑横织机自动夹线装置及其系统
JP6460923B2 (ja) * 2015-06-23 2019-01-30 日特エンジニアリング株式会社 線材把持装置及び線材把持方法
JP6436574B2 (ja) * 2015-06-23 2018-12-12 日特エンジニアリング株式会社 把持装置及び把持方法
CN105137912B (zh) * 2015-07-20 2018-02-13 广东溢达纺织有限公司 成衣生产中裁床自动拉布机的标准工时确定方法及系统
ITUB20155266A1 (it) * 2015-10-30 2016-01-30 Roj S R L Freno elettromagnetico pilotato per il controllo della tensione dei fili di trama in macchine tessili

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR891832A (fr) * 1942-11-30 1944-03-21 Perfectionnements au montage et au fonctionnement des organes de régulation des fils de trame pour métiers à tisser sans navette à trames multiples
US3181569A (en) * 1964-02-06 1965-05-04 Beacon Mfg Co Filling yarn control means
JPS5381758A (en) * 1976-12-27 1978-07-19 Nissan Motor Device for gripping weft on shuttleless loom
US4351370A (en) * 1980-05-05 1982-09-28 Crompton & Knowles Corporation Yarn brake for a textile machine
BE1001207A3 (nl) * 1987-11-12 1989-08-16 Picanol Nv Draadklem.
SE504096C2 (sv) * 1995-03-02 1996-11-11 F & N Mekanik Ab Garngripare för garnmatningssystem i vävstolar
EP0756028B1 (fr) * 1995-07-24 2000-01-19 Sulzer RàœTi Ag Frein de fil électromagnétique et métier à tisser avec un tel frein de fil

Also Published As

Publication number Publication date
CN1535336A (zh) 2004-10-06
DE10107311A1 (de) 2002-08-29
DE50206669D1 (de) 2006-06-08
EP1401751A2 (fr) 2004-03-31
WO2002066354A2 (fr) 2002-08-29
AU2002234633A1 (en) 2002-09-04
WO2002066354A3 (fr) 2003-12-11
CN1302167C (zh) 2007-02-28

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