EP0599930B1 - Messfournisseur - Google Patents

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Publication number
EP0599930B1
EP0599930B1 EP92917625A EP92917625A EP0599930B1 EP 0599930 B1 EP0599930 B1 EP 0599930B1 EP 92917625 A EP92917625 A EP 92917625A EP 92917625 A EP92917625 A EP 92917625A EP 0599930 B1 EP0599930 B1 EP 0599930B1
Authority
EP
European Patent Office
Prior art keywords
stop
yarn
stop element
clamping
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
EP92917625A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0599930A1 (de
Inventor
Anders SVANSTRÖM
Pär JOSEFSSON
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6438846&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0599930(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Iro AB filed Critical Iro AB
Publication of EP0599930A1 publication Critical patent/EP0599930A1/de
Application granted granted Critical
Publication of EP0599930B1 publication Critical patent/EP0599930B1/de
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
    • D03D47/362—Drum-type weft feeding devices with yarn retaining devices, e.g. stopping pins
    • D03D47/363—Construction or control of the yarn retaining devices

Definitions

  • the invention relates to a measuring feeder of the type specified in the preamble of claim 1.
  • a measuring feeder known from EP 0 441 288 A is used for the delivery of weft threads, for example on jet looms, the stop element serving to limit the length of the weft thread.
  • the stop element After the stop element has been disengaged, the weft thread is pulled off until the desired weft thread length is reached.
  • the thread runs around the storage body.
  • the stop element which is reinserted in time then forms a circumferential stop for the circulating thread which, after stopping from the last turn on the storage surface, extends obliquely to the stop element and from there to a thread guide element arranged approximately coaxially to the storage body or to an insertion or auxiliary nozzle, pulling the thread.
  • a swivel arm is provided, which is moved from the inside of the drum with a clamping part against an external counter-clamping part.
  • the swivel arm forms the stop device with the movably held clamping element, which holds the thread after the insertion process by clamping, but without a circumferential stop.
  • the swivel arm is adjusted by a control cam and a spring.
  • the invention has for its object to provide a measuring feeder of the type mentioned, in which thread errors due to loose windings on the storage surface and / or the thread slipping under the stop element are avoided.
  • the thread caught on the stop element in the circumferential direction is additionally stabilized by the thread clamp, so that the thread windings on the storage surface do not loosen upstream of the stop element due to the tension increases and relaxation in the thread.
  • the thread clamp prevents the thread from sliding back and also loosens the thread immediately when Stop element because it fixes the thread over a relatively large area. Since the thread clamp is controllable, it no longer has a negative influence when the thread is pulled off.
  • the thread clamp is brought into a passive clamping position by the movement of the stop element and is ready for the thread. If the thread comes to a stop at the stop element, then not only is the weft thread length precisely dimensioned, but the thread automatically sticks, so that the last thread turns on the thread storage surface do not relax inadmissibly, nor does the thread slip under the stop element.
  • the thread clamp keeps the thread relatively stretched at the stop element between at least two clamping points. As a result, a small penetration depth of the stop element and a short actuation stroke for the stop element can be selected, which enables the use of an inexpensive and quickly responding actuation magnet or an extension spring that extends the stop element only over a short stroke.
  • the embodiment according to claim 2 is structurally simple, in which the storage area forms the passive clamping area, so that a simple clamping element is sufficient to to fix the thread. Since the clamping element is mounted in a recess of the stop device in the rest position, the thread that may follow during the retraction movement of the stop element can be removed.
  • the embodiment according to claim 3 is expedient because the thread clamp is actuated synchronously with the stop element when the stop element has to catch the thread.
  • the thread clamp is inoperative when the stop element is moved out of the passage gap.
  • the embodiment according to claim 4 is advantageous, in which the stop element serves as a carrier of the clamping element.
  • the clamping element defines the thread outside the edge of the engagement recess several times, so that the thread does not slip under the stop element, even if a small depth of penetration is selected for the stop element.
  • a structurally simple, functionally reliable and space-saving embodiment emerges from claim 7.
  • a leaf spring can also achieve desirable elasticity, and thus gradually effective pull-down braking when the thread is clamped.
  • a particularly advantageous embodiment is also apparent from claim 8.
  • the leg of the leaf spring or of the wire bracket facing the passage gap and movably guided on the stop element clamps the thread gently but securely.
  • the movable lower leg strips the thread when the stop element is withdrawn.
  • the retracting movement of the stop element may be supported by the relaxing leaf spring or the wire bracket.
  • the clamping element has an additional function which effects the movement of the stop element in the push-out direction or in the return direction.
  • Components previously required in the stop device e.g. a push-out spring or a return spring can either be omitted or only weak and thus small.
  • the embodiment of claim 11 is advantageous so that the thread, despite the thread clamp provided in the stop element, reliably comes to rest against the stop element, which is important for the exact dimensioning of the weft thread length.
  • the tapering clamping gap brings about a desirable delay effect which dampens the dreaded whip effect. This improves the entry conditions in the weaving machine and reduces the risk of thread breaks.
  • a measuring feeder M is used to supply, for example, an air-jet weaving machine (not shown) with weft thread sections that are precisely dimensioned in length and are pulled off one after the other.
  • the measuring feeder M has a housing G, on which a storage body F is arranged in drum form, which has an external storage area 1 for the a winding element 2 in thread W applied thread Y.
  • the thread Y is drawn off from a thread supply spool (not shown) and introduced into the measuring feeder M, where the winding member 2, which can be driven to rotate, winds it in successive turns onto the storage surface 1.
  • the thread Y is withdrawn from the storage surface 1 under a stop device S attached to the housing G through an entry or auxiliary nozzle 3 overhead.
  • the stop device S contains an optionally extendable stop element P and a controllable thread clamp K.
  • the storage area 1 has axial fingers 5 distributed in the circumferential direction.
  • a finger 5 is aligned with the stop device S and is provided with a recess 7 for a free end 8 of the stop element P designed as a pin.
  • the stop element P can be extended by an actuating magnet 4 into the stop position shown as far as the recess 7 and retracted by a return spring (not shown).
  • a return spring not shown
  • a passage gap A is formed between the stop device S and the storage surface 1, through which the thread Y passes in the circumferential direction when it is drawn off.
  • the thread clamp K arranged on the stop device S has a clamping element C, in the present case a plate 6 with upturned edges, which is positioned on the stop element P and with it from a rest position, indicated by broken lines, into the solid lines shown clamping position is adjustable.
  • the stop element P forms a peripheral stop B for the thread Y.
  • the storage surface 1 forms a passive clamping surface 1 ', with which the clamping element C interacts in order to clamp the thread Y resting on the stop element P.
  • a downwardly open recess 9 is provided for the clamping element C, which is adapted to the shape of the clamping element C, so that when the stop elements S P and the clamping element C are withdrawn, the thread Y which is possibly raised is stripped off.
  • FIG. 2C illustrates how the thread comes to rest against the circumferential stop B after it has been pulled off in the circumferential direction 10.
  • the entry or auxiliary nozzle 3 Through the entry or auxiliary nozzle 3, it is loaded with a tensile force in the direction of an arrow 11 and is held approximately axially stretched. Upstream of the stop element P, the thread Y runs obliquely to the next thread turn on the storage area 1.
  • the clamping element C is so large that it extends beyond the edge of the engagement recess 7 and fixes the thread at least in two spaced apart areas 12 and 13, so that the thread Y cannot slip under the free end 8 of the stop element P.
  • the clamping element C is a U-shaped or V-shaped leaf spring 16, which is secured with its upper leg 17 on a shoulder 15 of the stop element B.
  • Your lower leg 18 is movably guided with a recess 19 on a lower part 14 of the stop element B.
  • the leaf spring 16 is advantageously biased so that the leg 18 is slightly raised when the thread Y strikes the lower part 14 of the stop element B and clamps the thread Y.
  • the bottom view of Fig. 3B is recognizable that the lower leg 18 is possibly supported on the stop element P for guidance, but remains movable.
  • FIG. 3C which matches the view of FIG.
  • the clamping element C is a spring wire clip 16 ', which is fixed with its upper leg 17' to the stop element B and is guided with its lower leg 18 'to the stop element or it engages with lateral play (recess 19 ').
  • the spring wire clip 16 ' also clamps the thread Y, as in FIG. 2C, on both sides outside the engagement recess 7 on the passive clamping surface 1'.
  • the clamping element C is a leaf spring or a spring steel stamped part 20 with a fastening end 21 and a mouth-shaped cutout 24 at the free end.
  • the leaf spring 20 is supported with its fastening end 21 in the stop device S.
  • the mouth-shaped incision 24 encompasses a transverse groove 22 of the stop element B above its free end 8.
  • the magnet 31 of the stop element can be designed so strong that it moves the leaf spring 20 from the rest position shown in FIG. 4A together with the stop element P into the position shown in FIG 4B deflects the clamping position shown, in which the thread Y attached to the stop element P is pressed against the passive clamping surface 1 'on the storage surface 1.
  • the leaf spring 20 with a pretension in the direction of an arrow 23 and to fix it in the stop device S such that it serves as an extension spring for the stop element P and pushes out the stop element P as soon as the magnet 31 designed as a return magnet de-excites becomes. It would also be conceivable for the leaf spring 20 as a return spring upwards to be biased so that it works against the magnet 31 working as a push-out magnet.
  • the recess 9 is provided in the stop device S, so that the passage gap A for the thread Y is free in the rest position. 4C shows a top view of a possible shape of the leaf spring 20.
  • the stop element P serves as a driver for the clamping element C, which is, for example, a curved leaf spring 25, a plastic plate, a wire bracket or the like, and is pivotably supported in the stop device S in a rotary bearing 26.
  • a driver connection 27 between the stop element P and the clamping element C ensures that, in the stop position of the stop element P (FIG. 5B), the clamping element at least partially comes out of the stop device S into the passage gap A and clamps the thread Y as soon as it stops at the stop element P. has come to the plant.
  • the clamping element with the storage surface 1 forms a clamping gap 28 tapering in the direction of the stop element, in which the thread Y is braked as it moves to the stop element.
  • the clamping element C can be designed with a low weight, so that the actuating force to be applied by the stop element P remains low.
  • 6A shows a further embodiment in the rest position; 6B, however, in the stop or clamping position.
  • the clamping element C is a leaf spring 30 biased in the direction of an arrow 23, which is supported at 31 ′ with the ends in the stop device S and rests on a shoulder 29 of the stop element P in its central region.
  • the magnet 31 is a pull magnet formed, which generates a tensile force in the direction of arrow 32 when excited. To move the stop element P into the stop position according to FIG. 6B, the magnet 31 is de-energized, so that the leaf spring 30 presses the stop element P into the engagement recess 7 in the storage area 1.
  • the leaf spring 30 partially enters the passage gap A in order to clamp the thread Y which has reached the stop element 8 and to define a clamping gap which tapers in the direction of the stop element P.
  • the recess 9 in the stop device S is adapted at least in its mouth region to the shape of the leaf spring 30, so that when the stop element P is pulled up, the thread Y is stripped off.
  • the thread clamp K arranged in the stop device S could also be designed differently from the illustrated embodiments. It is important to move the thread clamp synchronously with the stop element and to bring it into the clamped position or to adjust it to the rest position so that it is only effective when the stop element also performs its stop function.
  • the arrangement of the thread clamp in the stop device saves a separate holder for the thread clamp. Furthermore, there is no need for an independent control for the thread clamp because this uses the stop device or the stop element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
EP92917625A 1991-08-22 1992-08-21 Messfournisseur Expired - Lifetime EP0599930B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4127798A DE4127798A1 (de) 1991-08-22 1991-08-22 Messfournisseur
DE4127798 1991-08-22
PCT/EP1992/001927 WO1993004225A1 (de) 1991-08-22 1992-08-21 Messfournisseur

Publications (2)

Publication Number Publication Date
EP0599930A1 EP0599930A1 (de) 1994-06-08
EP0599930B1 true EP0599930B1 (de) 1996-05-29

Family

ID=6438846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92917625A Expired - Lifetime EP0599930B1 (de) 1991-08-22 1992-08-21 Messfournisseur

Country Status (7)

Country Link
US (1) US5462096A (cs)
EP (1) EP0599930B1 (cs)
JP (1) JP3282038B2 (cs)
KR (1) KR100251563B1 (cs)
CZ (1) CZ281325B6 (cs)
DE (2) DE4127798A1 (cs)
WO (1) WO1993004225A1 (cs)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0699790B1 (en) * 1994-07-19 2000-01-19 L.G.L. ELECTRONICS S.p.A. Thread arrester for weft feeders for air-jet looms
IT1271787B (it) * 1994-12-22 1997-06-09 Roj Electrotex Nuova Srl Unita' elettromagnetica di arresto del filo di trama per porgitrama misuratori
IT1277659B1 (it) * 1995-09-27 1997-11-11 Roj Electrotex Nuova Srl Dispositivo di blocco del filo di trama in fase di taglio associabile a porgitrama misuratori
DE19706288A1 (de) * 1997-02-18 1998-08-20 Iro Ab Meßliefergerät
DE10252604A1 (de) * 2002-11-12 2004-05-27 Iropa Ag Liefergerät
DE10340008A1 (de) * 2003-08-29 2005-03-24 Iropa Ag Messliefergerät
EP1811068B1 (de) * 2006-01-24 2009-06-17 Sultex AG Gesteuerte Fadenbremse
EP2169099A1 (en) * 2008-09-25 2010-03-31 L.G.L. Electronics S.p.A. Negative yarn feeder with weft-braking device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH647999A5 (de) * 1980-06-17 1985-02-28 Rueti Ag Maschf Fadenliefervorrichtung fuer textilmaschinen und verfahren zum betrieb der fadenliefervorrichtung.
US4627474A (en) * 1982-09-03 1986-12-09 Aktiebolaget Iro Yarn storing, feeding and measuring device
IT8323187V0 (it) * 1983-10-07 1983-10-07 Roy Electrotex Spa Struttura perfezionata di elettromagnete per arrestare lo svolgimento del filo di trama in dispositivi porgitrama per telai di tessitura.
EP0250359B1 (de) * 1986-06-16 1990-01-17 GebràœDer Sulzer Aktiengesellschaft Schussfadenspeicher für Webmaschine
EP0344100B1 (de) * 1988-05-20 1992-07-08 GebràœDer Sulzer Aktiengesellschaft Elektromagnetische Einrichtung für Webmaschinen
IT1237967B (it) * 1990-02-05 1993-06-19 Roy Electrotex Spa Alimentatore di trama per telai di tessitura a getto di fluido
IT1246421B (it) * 1990-08-03 1994-11-18 Roy Electrotex Spa Alimentatore di trama per telai di tessitura con gruppo di avvolgimento della riserva a sezione regolabile

Also Published As

Publication number Publication date
DE59206437D1 (de) 1996-07-04
EP0599930A1 (de) 1994-06-08
CZ281325B6 (cs) 1996-08-14
DE4127798A1 (de) 1993-02-25
WO1993004225A1 (de) 1993-03-04
CZ40594A3 (en) 1994-05-18
JPH07500802A (ja) 1995-01-26
JP3282038B2 (ja) 2002-05-13
US5462096A (en) 1995-10-31
KR100251563B1 (ko) 2000-04-15

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