EP0451176A1 - Dispositif de livraison du fil. - Google Patents

Dispositif de livraison du fil.

Info

Publication number
EP0451176A1
EP0451176A1 EP90900833A EP90900833A EP0451176A1 EP 0451176 A1 EP0451176 A1 EP 0451176A1 EP 90900833 A EP90900833 A EP 90900833A EP 90900833 A EP90900833 A EP 90900833A EP 0451176 A1 EP0451176 A1 EP 0451176A1
Authority
EP
European Patent Office
Prior art keywords
thread
delivery device
speed
drive
storage
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
EP90900833A
Other languages
German (de)
English (en)
Other versions
EP0451176B1 (fr
Inventor
Lars Helge Gottfrid Tholander
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.)
Iro AB
Original Assignee
Iro AB
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 AB filed Critical Iro AB
Publication of EP0451176A1 publication Critical patent/EP0451176A1/fr
Application granted granted Critical
Publication of EP0451176B1 publication Critical patent/EP0451176B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65H59/16—Braked elements rotated by material
    • 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
    • B65H59/18—Driven rotary 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 yarn delivery device according to the preamble of claim 1 and a method according to the preamble of claim 11.
  • an air nozzle near the yarn supply device is used as the hi-release device, either alone or in cooperation with an arm which can be pivoted resiliently transversely to the yarn path
  • Thread tension changes for the thread storage and delivery device during each take-off cycle of the thread seeks to keep small, which also result from the cyclically changing winding direction of the thread in the storage device designed as a bobbin.
  • the auxiliary device takes over, so to speak, part of the deduction work of the thread storage and delivery device.
  • the aim is to reduce the number of thread breaks.
  • the air nozzle with the swivel arm is a source of error in the thread path, since an exact adaptation of the effect of the pneumatic auxiliary device on the thread to the thread speed in the thread storage and delivery device is difficult.
  • the invention has for its object a
  • Thread supply device of the type mentioned at the beginning and a method by which the number of the
  • Thread breaks in general and specifically in the
  • Thread storage and delivery device is further reduced.
  • the object is achieved with the features specified in the characterizing part of patent claim 1 and with the method according to claim 11.
  • a mechanical friction drive with slip acting on the thread is able to set the thread speed upstream of the thread storage and delivery device so sensitively by means of an assisted conveyance that undesirably high loads for the thread storage and delivery device Thread to be avoided. This results in a noticeable decrease in thread breaks in general and in the thread storage and delivery device in particular.
  • the friction drive can be adapted to the take-off speed of the thread storage and delivery device with little control effort. It also dampens voltage peaks that result from the changing winding direction of the thread (thread plucking) on the bobbin.
  • the friction drive is structurally simple, takes up little space and can be easily adapted to different thread qualities.
  • the surface that the thread touches must not be sticky, but should be relatively smooth, gentle on the thread and wear-resistant.
  • a hard chrome-plated aluminum rotating surface or a plasma-coated ceramic surface is well suited for this purpose.
  • the drive provides power for the thread; depending on the thread tension, the thread absorbs as much force as it needs to reach the required thread speed.
  • the thread storage and delivery device is largely relieved of this task. Modulation of the action on the thread is also possible by influencing the drive transmission in the friction drive.
  • Wrapping angle s of the thread in the friction drive modulates the effect on the thread by using a greater wrap angle to provide more assistance, but using a smaller wrap angle to control weaker assistance.
  • the wrap angle serves as a control variable for the slip.
  • the thread deflection from the bobbin to the store which was previously required in the usual vertical bobbin and horizontal thread feeder and delivery device, is taken over by the fiction drive as an additional advantage (claim 5).
  • the Fri rtionsrol Le can be light and low inertia and can be quickly accelerated and decelerated to the required speed. Thread plucking from the bobbin compensates for the friction roller.
  • the clutch according to claim 6 causes the thread with the friction roller to run without its direct drive if this is favorable under certain operating conditions.
  • the thread is pulled over the engaged clutch and the falling drive speed decelerated cleanly, which at least largely prevents the thread from running on due to its mass and thus an undesirable transfer.
  • the friction roller Le can be braked quickly with the braking device or braked specifically and modulated when working and generate a desired thread tension. Given all this, a one-way locking freewheel is then also provided.
  • the specially selected surface covering of the friction roller according to claim 8 also determines the slippage of the thread.
  • different surface coverings can be provided axially next to one another, of which the appropriate one is used.
  • the embodiment according to claim 9 is important because the speed control unit carries out the precise control of the friction drive as a function of the thread speed determined by the thread storage and delivery device. However, it is also conceivable to drive the friction drive independently, and the actual thread speed can only be achieved by modulating the action, e.g. through the slip to regulate. Even particularly sensitive or weak threads can be processed break-proof at high speed.
  • a uniform adaptation of the thread speed for the thread storage and delivery device is achieved.
  • the thread no longer breaks in the thread storage and delivery device, even at high speed and with a relatively sharp deflection.
  • the deliberately controlled Difference in speed causes the slip that is needed to assist the driver (braking or accelerating).
  • the process variant according to claim 11 is simple in terms of control technology. From the beginning, the increase in slip increases.
  • the work area is divided into several adjoining areas.
  • the thread e.g. braked in the phase-out phase of the thread storage and delivery device to prevent overrun, because the friction drive runs slower than the thread or is at a standstill.
  • the friction drive can be uncoupled from its drive, the thread is then exposed to the mechanical resistance to movement of the friction drive, which
  • the friction drive which is driven faster than the thread, provides an excess overlap that the thread with slippage at least partially absorbs when necessary.
  • the precisely metered assistance also suppresses tension fluctuations in the thread in this speed range.
  • the assist promotion brakes in the area of low thread speed, while it feeds at higher thread speed.
  • FIG. 1 schematically shows a thread delivery device with an auxiliary vor ⁇ 'c Pla
  • a delivery device 1 for a thread Y to a textile machine 2 e.g. an air jet weaving machine
  • an insertion device 3 e.g. an air nozzle provided to the textile machine.
  • the Eint ragvorri chtüng 3 are a thread eye 5 and a thread storage and delivery device 4 placed in front, which, if a length section of sized weft thread is to be processed, can have a measuring device for the weft thread length respectively output.
  • a further thread eyelet 6 is provided upstream of the thread storage and delivery device 4.
  • a drive motor 7, connected to a controller (not shown) of the thread feeder and delivery device, drives a winding element 18 which winds up the thread Y on a feed surface 19.
  • the thread Y comes from a thread supply device 8, for example, a conical bobbin 9, on which it is wound, for example crossing with changing direction.
  • An auxiliary device 10 is arranged between the bobbin 9 and the thread eyelet 6, expediently close to the bobbin 9.
  • the auxiliary device 10 is a friction drive R with a friction roller 11, for example with a frictionally active surface.
  • the friction roller 11 sees with an adjustable drive 12, for example one Stepper motor, in drive connection.
  • the control of the drive 7 of the thread storage and delivery device 4 is connected via a line 16 to a control unit 15 which is informed of the thread speed.
  • the drive 12 can also be connected to the control unit 15 via a line 17.
  • a clutch 13 that can be released and engaged, possibly modulated, can be arranged, if this is not a direct drive connection, which enables the friction roller 11 in the released state, faster or To run slower than the drive motor 12.
  • a modular braking device for the friction roller Le 11 could also be provided. If necessary, instead of clutch 13, a freewheel that only locks in the drive direction is provided.
  • the coil 9 is vertical; the thread storage and delivery device 4, however, approximately horizontal.
  • the thread 4 is deflected on the friction roller 11 with an angle of wrap of approximately 90 °. The angle can be adjusted.
  • the entry device 3 subtracts from the thread feeder and feed device 4, for example, in the length exactly predetermined thread sections.
  • the drive motor 7 constantly maintains a thread supply in the thread storage and delivery device 4 and pulls the thread Y from the bobbin 9. This is done so that the thread runs practically continuously.
  • the pulling of the thread Y from the bobbin 9 is precluded by a certain deviation and, if necessary, tension peaks in the case of changes in the direction of the thread (thread plucking).
  • the auxiliary device 10 assists in conveying the yarn Y at the speed required by the yarn storage and delivery device or brakes it so that changes in the tension in the yarn Y remain small. Voltage fluctuations due to changing winding direction ( thread plucking) on the spool 9 are compensated or filtered by the auxiliary device 10 and are almost no longer noticeable in the area 20 of the thread deflection in the device 4.
  • the thread speed KY remains below that in the entire working range
  • Circumferential speed KR of the friction drive Both speed curves are idealized as straight lines with different increases. Between the thread and the friction drive, an increasing slip occurs with increasing thread speed, so that the friction drive can always push when the thread storage and delivery device 4 so requests.
  • Area A ranges up to a relative low speed reference value a; the range B from a to a higher speed reference value b; the range C from b to the highest speed reference value c (max.
  • Thread speed value VYmax Thread speed value VYmax.
  • the thread is braked by the friction drive, which may be stationary.
  • the clutch is engaged. This is particularly important in the phase-out phase.
  • area B the clutch is released.
  • the friction drive turns freely with the thread; slip occurs due to the rotational resistance of the friction drive.
  • area C the friction drive is positive
  • the curve KR can ideally be a straight line (FIG. 4a) or a flat S curve (FIG. 4b) with the turning point at point d.
  • the friction drive could also be driven with the thread movement in the opposite direction in order to * intentionally generate an even stronger braking.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

Dans un dispositif de livraison du fil pour machines textiles (2), notamment des métiers automatiques à buses d'air, ayant un dispositif (4) de stockage et de livraison du fil agencé entre un dispositif (8) à magasin du fil et le dispositif (3) d'insertion de la machine textile, ainsi qu'un dispositif auxiliaire (10) agencé sur le trajet du fil entre le dispositif à magasin du fil et le dispositif de stockage et de livraison du fil, le dispositif auxiliaire (10) comprend un entraînement par friction (R) du fil (Y). Selon un procédé d'entraînement du fil, la vitesse de rotation (KR) de l'entraînement par friction (10) qui forme le dispositif auxiliaire est fixée à une valeur supérieure ou inférieur à celle de la vitesse du fil (KY) dans le dispositif (4) de stockage et de livraison du fil, et le fil (Y) est accéléré ou freiné sur la circonférence de l'entraînement par friction avec un glissement maintenu pendant l'entraînement.
EP90900833A 1988-12-31 1989-12-29 Dispositif de livraison du fil Expired - Lifetime EP0451176B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8900006 1988-12-31
SE19898900006A SE8900006D0 (sv) 1988-12-31 1988-12-31 Anordning vid en garnlager- och matningsenhet foer textilmaskiner foeretraedesvis vaevmaskiner

Publications (2)

Publication Number Publication Date
EP0451176A1 true EP0451176A1 (fr) 1991-10-16
EP0451176B1 EP0451176B1 (fr) 1993-11-18

Family

ID=20374663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90900833A Expired - Lifetime EP0451176B1 (fr) 1988-12-31 1989-12-29 Dispositif de livraison du fil

Country Status (7)

Country Link
US (1) US5385310A (fr)
EP (1) EP0451176B1 (fr)
JP (1) JP3141137B2 (fr)
KR (1) KR0140237B1 (fr)
DE (1) DE58906222D1 (fr)
SE (1) SE8900006D0 (fr)
WO (1) WO1990007600A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH685778A5 (de) * 1991-05-24 1995-09-29 Rueti Ag Maschf Vorrichtung zum Zuführen eines Schussfadens an eine Schusseintragseinrichtung einer Webmaschine.
WO1994012709A1 (fr) * 1992-12-03 1994-06-09 Iro Ab Procede pour la commande d'un systeme de livraison du fil et systeme de livraison du fil
DE4324160A1 (de) * 1993-07-19 1995-01-26 Iro Ab Eintragsystem für eine Düsenwebmaschine
DE19841699A1 (de) * 1998-09-11 2000-03-16 Iro Patent Ag Fadenverarbeitungssystem
DE19942121A1 (de) * 1999-09-03 2001-03-08 Iro Patent Ag Baar Verfahren zum Steuern eines Fadenverarbeitungssystems und Fadenverarbeitungssystem
WO2012174514A1 (fr) 2011-06-16 2012-12-20 American Linc, Llc Ensemble rouleau de suralimentation, textile et procédé de réglage de la tension d'un fil se déplaçant

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT312146B (de) * 1967-09-13 1973-12-27 Morat Gmbh Franz Fadenzuführung an einer Strickmaschine
CH454697A (de) * 1967-09-26 1968-04-15 Schaerer Maschf Fadenlieferwerk
GB1262179A (en) * 1968-10-14 1972-02-02 Rosen Karl I J Thread storage and delivery device for textile machines
US3831873A (en) * 1970-05-26 1974-08-27 Leesona Corp Take-up system
FR2278817A1 (fr) * 1974-07-17 1976-02-13 Inst Textile De France Dispositif d'alimentation en fil pour metier de bonneterie
JPS6032041Y2 (ja) * 1978-11-07 1985-09-25 帝人株式会社 糸条処理ロ−ラ
US4403634A (en) * 1980-04-01 1983-09-13 Sulzer Brothers Limited Weft yarn storage device for weaving machines
DE3412550A1 (de) * 1984-04-04 1985-10-17 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt Vorrichtung fuer positive fadenlieferung an textilmaschinen
DE3437252C1 (de) * 1984-10-11 1986-01-16 Gustav 7290 Freudenstadt Memminger Fadenspeicher- und -liefervorrichtung,insbesndere fuer Textilmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9007600A1 *

Also Published As

Publication number Publication date
DE58906222D1 (de) 1993-12-23
WO1990007600A1 (fr) 1990-07-12
KR0140237B1 (ko) 1998-07-01
JP3141137B2 (ja) 2001-03-05
KR910700371A (ko) 1991-03-15
SE8900006D0 (sv) 1988-12-31
EP0451176B1 (fr) 1993-11-18
US5385310A (en) 1995-01-31
JPH04502652A (ja) 1992-05-14

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