EP1015370A1 - Procede pour le stockage intermediaire de fil, et appareil distributeur - Google Patents

Procede pour le stockage intermediaire de fil, et appareil distributeur

Info

Publication number
EP1015370A1
EP1015370A1 EP98951407A EP98951407A EP1015370A1 EP 1015370 A1 EP1015370 A1 EP 1015370A1 EP 98951407 A EP98951407 A EP 98951407A EP 98951407 A EP98951407 A EP 98951407A EP 1015370 A1 EP1015370 A1 EP 1015370A1
Authority
EP
European Patent Office
Prior art keywords
winding
standstill
rotary drive
holding torque
holding
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.)
Granted
Application number
EP98951407A
Other languages
German (de)
English (en)
Other versions
EP1015370B1 (fr
Inventor
Björn Halvarsson
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
Iro Patent 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 Iro Patent AG filed Critical Iro Patent AG
Publication of EP1015370A1 publication Critical patent/EP1015370A1/fr
Application granted granted Critical
Publication of EP1015370B1 publication Critical patent/EP1015370B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
    • 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

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a delivery device according to the preamble of claim 11.
  • the invention is based on the object of specifying a method of the type mentioned at the outset and a delivery device for carrying out the method, with which malfunctions and damage due to a reversing movement after a standstill are avoided.
  • the holding torque prevents the thread from relaxing or loosening during a standstill period.
  • the correct thread position does not change during the standstill period.
  • the holding torque has an additive effect on the rotation resistance of the winding rotary drive and the components connected to it, but without generating a rotation in the winding direction.
  • the winding rotary drive is statically preloaded, so to speak, in the winding direction.
  • the thread breakage rate and also the rate of possible fabric defects can be noticeably reduced. This is particularly advantageous in the case of weaving machines in which there are longer standstill periods for individual delivery devices, depending on the pattern.
  • the backstop can be activated exactly in time by a holding current and is therefore also sufficiently precise for fast-moving delivery devices to suppress the undesired backward turning.
  • components that are provided in terms of control technology and design can also be used for this additional function.
  • the holding torque is only adjusted to such an extent that it compensates for the expected jerk torque, specifically in connection with the system-related rotational resistance in the winding rotary drive.
  • the jerk torque can be the result of a tensile stress acting when the thread is at a standstill, especially with elastic Thread material and / or a reaction of elastic components of the delivery device, for example a full body or an elastic dust seal, ie the one or, for example via a drive mechanism for thread separation, act back into the winding rotary drive
  • the holding torque is constant and simple in terms of control technology by means of a holding current or a holding voltage when a standstill phase begins and is maintained over the entire standstill phase
  • the holding torque is set in advance or lagging or exactly at standstill, it would be ideal to set the holding torque briefly after the standstill, for example a few milliseconds later, in order to then release the breakaway torque of the winding rotary drive that occurs in both Direction of rotation has an effect, however, it can be difficult in terms of control technology to detect the exact point in time of the mechanical standstill of the delivery device and then to adapt the setting of the holding torque to it. In terms of control technology, it is easier to set the holding torque prematurely in order to reliably prevent the jerk rotation prevent
  • the holding torque is set to zero when the electrical speed is reached. This is generally known and occurs before the standstill. Thus, a preliminary to the mechanical standstill is activated
  • the winding rotary drive is electrically braked before setting the holding torque in order to suppress a too long caster movement due to the inertia of the system
  • the winding rotary drive is moved to a standstill with a creeper gear rotation.
  • the creeper gear rotation serves for correct thread control in the run-down phase and possibly also for bringing the winding rotary drive to a standstill in a predetermined position.
  • the holding torque is set as a function of the thread quality and / or the mechanical rotational resistance, specifically with a view to compensating on the one hand for the expected return torque completely or at least as far as possible and on the other hand not causing any further movement in the winding direction .
  • the holding torque is set correspondingly with only a fraction of the maximum electrical speed, but in such a way that no further rotation of the winding drive occurs.
  • the frequency is increased by a multiple while lowering the voltage. This allows the holding torque to be set and maintained with great care.
  • the winding rotary drive forms the reverse rotation lock, which, on the one hand, prevents the thread from loosening without further rotation in or opposite to the winding direction, and on the other hand, prevents winding of further thread during the standstill period.
  • the holding torque is set via a microprocessor of the electrical control device, which is prepared on the software side for this task.
  • Microprocessors usually provided in delivery devices, like the control electronics, are readily able to carry out this additional task without constructive modifications to the delivery device. In principle, a slight backward movement or a small rotation in the winding direction could sometimes occur under special operating conditions. However, this would be tolerable within the scope of the solution to the task at hand, because operational safety has already been considerably improved if it is highly likely that turning back will be avoided or will only occur in a weakened manner at times.
  • FIG. 1 is a schematic side view of a delivery device
  • Fig. 2 is a diagram of the operating behavior of the delivery device
  • FIG. 3 shows a further diagram to clarify the method according to the invention.
  • a thread delivery device F in FIG. 1 serves to temporarily store a thread Y during the thread delivery to a consumer, for example a weaving machine, which processes the thread Y as a weft thread.
  • the delivery device F could also be used in a different training for a knitting machine.
  • a winding element 2 is rotatably arranged, which can be rotated by means of a winding rotary drive 3, for example an asynchronous motor, relative to a drum-shaped, stationary storage body 4, for example in the winding direction 5.
  • the thread Y is drawn off from a supply spool 7, and brought to the outer periphery of the storage body 4 by a hollow shaft with an oblique winding tube 2a and wound tangentially thereon in adjacent turns 6.
  • An electronic control device CU is connected to the winding rotary drive 3 and contains, for example, a microprocessor MP.
  • An optionally provided sensor S1 generates signals that represent the rotational position of the winding element 2.
  • Another sensor S2 can scan the number of thread turns 6 or the size of the thread supply formed by the thread turns on the storage body 4 and whether the thread supply falls below a predetermined limit or exceeds another predetermined limit, supply signals to the control device CU.
  • the control device CU uses the microprocessor MP to control the winding rotary drive 3 such that the winding element 2 is rotated in the winding direction 5 to supplement the thread supply or as a function of signals from the sensors S2 or S1 or a signal from the associated textile machine of the Wik - rotary actuator 3 is stopped for one standstill period and, if necessary, is electronically braked to a standstill. If necessary, a certain angle of rotation or a certain period of time with a rotation in the winding direction is passed through at creep speed before reaching standstill.
  • the winder rotary drive 3 forms an electromotive backstop D of the thread delivery device which can be activated via the control device CU.
  • the thread delivery device F could be equipped with a thread braking device downstream of the windings 6 and could be used for thread delivery to a projectile or rapier weaving machine (not shown).
  • a thread delivery device F When threading to a jet loom (not shown), e.g. an air-jet or a water-jet weaving machine, on the other hand, the thread delivery device F would be designed as a measuring delivery device, which releases a precisely predetermined thread length for the take-off for each insertion process.
  • a stop device that can be adjusted between a release position and a stop position works together with the storage body 4, and scanning devices are provided on the thread delivery device F, which monitor the withdrawal of only a predetermined number of turns.
  • the storage body could be designed with a variable diameter or with an unchangeable diameter.
  • the above-mentioned backstop D has the task of preventing the winding element 2 from turning back when the winding rotary drive 3 is at a standstill, so that the thread Y does not relax or loosen as it passes through the winding element 2, 2a down to the storage body 4.
  • a reversing movement could be caused by a tension acting in the yarn Y at a standstill, which due to the lever arm of the outlet of the winding element 2 closes the winding element 2 in the reverse direction seeks to turn, or for example by elastic components K in the yarn delivery device, which act when the winding element 2 is stationary back into the winding rotary drive 3.
  • These could be elastic dust seals in the winding element 2 and / or in the storage element 4 if this is equipped with feed elements for thread separation, which are driven indirectly by means of the winding rotary drive.
  • the backstop D works as follows:
  • a holding torque preferably of constant strength, is set in the winding rotary drive 3 and maintained over the standstill period.
  • the holding torque is only set so strongly that no further rotation in the winding direction of rotation occurs in the winding rotary drive 3, and that the winding element 2 is not rotated backwards under the reverse torque.
  • the holding torque is controlled by a multiple, for example a factor of 10 or more, with a frequency that is increased compared to the frequency shortly before the standstill, with a correspondingly reduced voltage. If the frequency was approximately 0.5 Hz during the creeper phase to a standstill, the frequency is increased to 5.0 to 10 Hz in order to control the holding torque in order to avoid an undesired step function.
  • the setting of the holding torque is expediently carried out when the electrical speed reaches zero, ie at a point in time at which the mechanical speed is not yet zero or the standstill has not yet occurred.
  • a voltage that is between 2% and 5% of the nominal operating voltage can be used to set the holding torque.
  • the holding torque can be set in accordance with an electrical speed of, for example, only 1% of the maximum electrical speed, so that the winding element does not continue to rotate after it has stopped. It would be optimal to set the holding torque in the winding direction very shortly after the mechanical standstill, for example a few milliseconds afterwards, in order to be able to use the relatively high breakaway torque after the standstill.
  • the setting of the holding torque exactly at standstill or in advance of this can also be used.
  • Fig. 2 the time is plotted on the horizontal axis, while the speed, the torque or the current of the winding rotary drive are shown vertically over time.
  • the initial area B belongs to a running phase, which is followed by a standstill period C, which is followed by a new running phase B.
  • the electrical speed of the winding rotary drive drops sharply because it is expedient to brake electrically.
  • electrical speed zero is reached. The mechanical speed drops until the actual standstill t x .
  • the constantly set holding torque H is maintained, which is either set at time t v , that is, leading to standstill t x , or at mechanical standstill at time t x , or lagging by a time difference ⁇ t at time t n .
  • the winding rotary drive is started again in the winding direction along curve b.
  • the winding rotary drive can be controlled in both directions of rotation, for processing threads with S or Z twist.
  • the holding torque H is generated in each case in the selected winding direction, but only with a strength which avoids further rotation of the winding rotary drive in the winding direction 5, but on the other hand prevents a reverse rotation below the reverse torque.
  • Fig. 3 it is indicated above the time axis t how the holding torque H acting in the winding direction with a constant size is set from standstill t x or leading or lagging at time t v or t n and with the system-related rotational resistance M w of the winding rotary drive and the components of the delivery device coupled to it are effective against the negative return torque R, which stand (time t x ) occurs.
  • the return torque may be variable, but is not able to overcome the sum of the holding torque H and the mechanical rotational resistance M w in the reverse direction.
  • the holding torque H is only so large that it cannot overcome the mechanical rotational resistance M w in the winding direction.
  • the winding rotary drive therefore remains in a statically pretensioned state in the winding direction over the standstill period, without rotating in the winding direction or in the opposite direction.
  • a signal which then occurs from the sensor S1 can be used in the control device CU in FIG. 1 in order to cancel the holding torque H or to lower.
  • the electromotive backstop D can be used for delivery devices that have a stationary or rotating drive body. Such delivery devices with an electromotive backstop D can also be used for thread-consuming textile machines other than those mentioned at the beginning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Looms (AREA)

Abstract

L'invention concerne un procédé de stockage intermédiaire de fil (Y) sur un corps de stockage (4) du type tambour d'un appareil distributeur (F), dans lequel, au moyen d'un dispositif d'entraînement en rotation d'enroulement (3) électrique, le fil est appliqué sur le corps de stockage (4), par des déplacements en rotation relatifs, interrompus par des périodes d'arrêt (C), entre un élément d'enroulement (2) et le corps de stockage (4). Selon ledit procédé, pendant chaque période d'arrêt (C), un couple de rotation de freinage (H) agissant dans le sens de l'enroulement (5) est produit électriquement dans le dispositif d'entraînement en rotation d'enroulement (3). Dans un appareil distributeur permettant la mise en oeuvre de ce procédé, est monté un système de blocage de rotation inverse (D) à moteur électrique, qui peut être activé par un courant d'arrêt pendant chaque période d'arrêt (C).
EP98951407A 1997-09-16 1998-09-15 Procede pour le stockage intermediaire de fil, et appareil distributeur Expired - Lifetime EP1015370B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9703369A SE9703369D0 (sv) 1997-09-16 1997-09-16 Verfahren zum zwischenspeichern von faden und liefergerät
SE9703369 1997-09-16
PCT/EP1998/005870 WO1999014149A1 (fr) 1997-09-16 1998-09-15 Procede pour le stockage intermediaire de fil, et appareil distributeur

Publications (2)

Publication Number Publication Date
EP1015370A1 true EP1015370A1 (fr) 2000-07-05
EP1015370B1 EP1015370B1 (fr) 2002-07-17

Family

ID=20408291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98951407A Expired - Lifetime EP1015370B1 (fr) 1997-09-16 1998-09-15 Procede pour le stockage intermediaire de fil, et appareil distributeur

Country Status (7)

Country Link
US (1) US6279619B1 (fr)
EP (1) EP1015370B1 (fr)
JP (1) JP2001516691A (fr)
KR (1) KR100375717B1 (fr)
DE (1) DE59804821D1 (fr)
SE (1) SE9703369D0 (fr)
WO (1) WO1999014149A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19941889A1 (de) * 1999-09-02 2001-03-08 Iro Patent Ag Baar Fadenliefergerät
EP1087045B1 (fr) * 1999-09-27 2004-02-25 Sultex AG Procédé pour faire fonctionner le fournisseur d'un métier à tisser
US6371169B1 (en) 1999-09-27 2002-04-16 Sulzer Textil Ag Method for the operation of a thread supplying apparatus of a weaving machine
DE10014623A1 (de) 2000-03-24 2001-09-27 Iro Patent Ag Baar Verfahren zum Steuern eines Webmaschinen-Fadenliefergeräts
DE10153856A1 (de) * 2001-11-02 2003-05-15 Iropa Ag Fadenliefervorrichtung und Verfahren zur Fadenlieferung
DE102005023929B3 (de) * 2005-05-24 2006-09-14 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Verfahren zum Betreiben einer Projektilwebmaschine
CN102548884B (zh) 2009-09-30 2016-03-16 村田机械株式会社 纱线卷绕装置
JP5287992B2 (ja) * 2009-09-30 2013-09-11 村田機械株式会社 糸巻取装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH616902A5 (fr) 1976-10-28 1980-04-30 Sulzer Ag
IT1217339B (it) * 1988-02-11 1990-03-22 Roy Electrotex Spa Alimentatore di filo per macchine tessili
JPH05179538A (ja) 1991-12-27 1993-07-20 Ichikawa Tekkosho:Yugen フィーダー装置
NL9201344A (nl) 1992-07-24 1994-02-16 Rueti Inrichting voor het voeden van een periodiek werkende garen-verwerkende inrichting.
SE502175C2 (sv) * 1993-12-17 1995-09-04 Iro Ab Förfarande och anordning för fastställande av trådmagasinets variation på en fournissör
DE19526216A1 (de) * 1995-07-18 1997-01-23 Iro Ab Verfahren zum Abtasten eines Fadens und Fadenabzugssensor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9914149A1 *

Also Published As

Publication number Publication date
KR100375717B1 (ko) 2003-03-15
DE59804821D1 (de) 2002-08-22
EP1015370B1 (fr) 2002-07-17
KR20010024019A (ko) 2001-03-26
SE9703369D0 (sv) 1997-09-16
JP2001516691A (ja) 2001-10-02
US6279619B1 (en) 2001-08-28
WO1999014149A1 (fr) 1999-03-25

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