EP0385893B1 - Vorrichtung zum selektiven Halten der Schussfadenspannung bei Webemaschinen - Google Patents

Vorrichtung zum selektiven Halten der Schussfadenspannung bei Webemaschinen Download PDF

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Publication number
EP0385893B1
EP0385893B1 EP90420106A EP90420106A EP0385893B1 EP 0385893 B1 EP0385893 B1 EP 0385893B1 EP 90420106 A EP90420106 A EP 90420106A EP 90420106 A EP90420106 A EP 90420106A EP 0385893 B1 EP0385893 B1 EP 0385893B1
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EP
European Patent Office
Prior art keywords
clamp
shuttle
batten
mobile
jaw elements
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
EP90420106A
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English (en)
French (fr)
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EP0385893A1 (de
Inventor
Aimé Fabre
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Individual
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D43/00—Looms with change-boxes
    • D03D43/10—Weft catchers, i.e. means for preventing entanglement of wefts

Definitions

  • the present invention relates to weaving looms with one or more shuttles and it relates more particularly to large width machines of the kind used for the production of tubular fabrics intended for the paper industry.
  • the present invention mainly intends to remedy, and this by means of two selector devices arranged on the loom in front of the leaf and suitable for ensuring the gripping and keeping under tension of each of the weft threads. at the exit of the crowd, before tightening each pick.
  • each of the two devices concerned comprises a number of clamps equal to that of the shuttles of the trade, each of said clamps being carried by a movable member which is controlled so as to affect either an extension position for which said clamp, bearing against a bearing provided on the leaf, is capable of gripping the weft thread under tension, or a retracted position for which this clamp is on standby outside the movement of va -and coming from the leaf, that is to say still a medium position for which the clamp is located a short distance from the abovementioned stop to allow the release of the weft thread when the shuttle enters the crowd again, the movable members holding the clamp being arranged at different levels corresponding to those of each shuttle box and being controlled in height so that the clamp of one comes to cooperate at the oppo moment rtun with the aforementioned span of the leaf.
  • two devices 8 intended to keep the weft threads 5 under tension are fixed on the slides 7 immediately after their installation by one of the three shuttles 9 in the trade.
  • Each device 8 is located substantially midway between the edge of the fabric 6 and the corresponding shuttle box 1.
  • These two devices 8 are symmetrically identical to each other, so that the explanations given for one of them (the one on the left in this case), will be valid, mutatis mutandis, for the other .
  • each device 8 comprises a housing 10 with a rectangular profile.
  • this housing 10 In the vicinity of the wall of this housing 10 which is oriented parallel to the leaf 2 and opposite to it, there is provided an axis 11 on which the movable rod 12 of a pneumatic cylinder is articulated, the cylinder 13 of which is secured to the cylinder 14 of a second pneumatic cylinder.
  • the movable rod 15 of the latter carries at the end a transverse axis 16 on the ends of which are articulated two bent levers 17.
  • each angle lever 17 pivots freely 17a on the corresponding wall of the housing 10, while its free end is profiled in the manner of a fork embracing a roller 18.
  • the axis which supports each roller 18 is fixed laterally against a cross member 19 which is free to move vertically in the part of the housing 10 which opens in the direction of the leaf 2.
  • the two pneumatic cylinders 12-13 and 14-15 are capable of being controlled in succession to vertically move the crosspiece 19 and give it either a high position for which it comes to bear against an upper stop 20 fixed against the housing 10 , either a low position for which it bears against a lower stop 21 of said housing, or even an average position provided midway between the two extreme positions indicated above.
  • the cross member 19 forms a common support for the end of the cylinder 22 of three pneumatic cylinders oriented parallel to each other, but arranged on said cross member 19 at three different heights, of so as to form a sort of fan in a vertical plane.
  • the opposite end of each cylinder 22 articulates freely on the axis 11 carried by the housing 10, while the movable member or rod 23 of each cylinder extends in the direction of the leaf 2 to form a support for a clamp 24 .
  • Each clamp comprises a main body 25 provided with a split flange 25 a which ensures its fixing at the end of the movable member 23.
  • This body 25 is integral with a lateral crosspiece 25 b on which two double links 26 are freely articulated , the free ends of these enclosing two supports 27. As more particularly shown in FIG. 6, these two supports 27 hold between them a blade 28 against which two jaws 29 are resiliently applied under the effect of return systems, three in number in the example considered.
  • Each system comprises two opposite springs 30 compressed between one of the jaws 29 and a stop 31; the two stops 31 are screwed onto the threaded ends of the same stud 32 which crosses the jaws 29 with play and the guidance of which is ensured by said stops 31, engaged practically without play in openings made in the supports 27.
  • one of the double links 26 is provided with an actuating stub 26 a and it is understood that if one exerts a pressure on said heel directed towards the inside of the clamp, the two links 26 rock around their pivots 33, which has the effect of moving laterally the assembly formed by the supports 27, the blade 28 and the jaws 29, as illustrated in broken lines.
  • This lateral movement takes place against elastic return means constituted by a spring 34 housed in a cavity of the main body 25 and held between the annular bottom of said cavity and the head of a screw 35 which is screwed in a cylindrical die 36, which is retained in holes made in one and the other jaws 29.
  • each jaw 29 is shaped so as to constitute a jaw 29 a whose profile emerges well from the examination of FIG. 4 and 6. It is intended that these jaws 29 a , normally maintained applied one against the other by the springs 30, must open automatically when the assembly formed by the supports 27, the central blade 28 and the jaws 29 moves laterally under the effect of a pressure exerted on the heel 26 a ; for this purpose, the body 25 is integral with a rod 37 which is oriented parallel to the screw 35 to engage between the jaws 29 and which carries at the end a stop 38, profiled to cooperate with bearings 29 b provided on said said jaws.
  • each clamp holder cylinder 22-23 is assembled by a transverse flange 39 (FIG. 4) to a tubular rod 40 oriented parallel to said member. Inside of the rod 40 axially slides a plunger 41 associated with a return spring 42 and for the actuation of the bead 26 has the above-mentioned.
  • the rod 40 associated with each cylinder 22-23 freely crosses the crosspiece 19 to come to cooperate with a stroke limitation mechanism.
  • This mechanism comprises a small plate 43 (FIGS. 7 to 9) which flanges 44 make integral with the cylinder 22 of the envisaged jack and which is equipped with a tilting pallet 45 oriented parallel to the axis of said jack.
  • the end of this pallet 45 which is turned in the direction of the axis 11 is subjected to the action of an electromagnetic jack 46 which, when excited, causes said end to tilt downwards against elastic return means 47 associated with the opposite end of the pallet and housed inside a small cover 48 secured to the plate 43.
  • the tipping platform 45 is intended to cooperate with a dog 49 hinged 49 has a vertical leg 50 which is fixed at the end of the free end of the tubular shaft 40 and which freely slides along a guide bar 51 disposed au below said rod, as illustrated in fig. 8 and 9. Things are arranged so that when the pallet 45 is not actuated by the jack 46, the upper end of the dog 49 has the very slight clearance indicated in J in fig. 8 to pass freely below the plate 43. On the other hand, when this pallet 45 is lowered by the aforementioned jack, the dog 49 comes into contact with the end of said pallet (see fig. 9) and therefore rocks around its pivot 49 a , then actuate the pusher 41, the end of which protrudes beyond the end of the tubular rod 40.
  • each clamp 24 is provided with a projection or stop 25 c (see fig. 3, 5 and 6) provided on the underside of said body in order to cooperate with a corresponding bearing 52 fixed laterally against the anterior face of the leaf 2, at each device 8 according to the invention.
  • the cooperation of this projection or stop 25 c and one or other of the spans 52 of the leaf 2 ensures the perfectly precise positioning of each of the clamps 24 relative to the shuttles 9 when these clamps are in the extended position maximum.
  • valves which supply the various pneumatic cylinders 12-13, 14-15 and 22-23 of each of them, as well as the contactors which control the electromagnetic cylinders 46, are placed under the dependence of an automaton 53 which operates the management of the various movements of the assembly formed by the two devices 8 and the loom.
  • this automaton 53 is capable of being programmed so that when the shuttle 9 which has just passed through the crowd by depositing a pick between the warp threads 4 comes out of these, one of the pneumatic cylinders 22-23 is actuated to bring its clamp 24 to the maximum extension position, at the same time as the cylinders 12-13 and 14-15 are themselves powered to vertically move the cross member 19 and ensure that the stop 25 c of the clamp 24 considered comes, at the end of travel of the corresponding movable member 23, to be positioned properly against the bearing 52 of the leaf 2, then in the retracted position.
  • each shuttle 9 of the loom being provided with a lateral lug 9 a (fig. 2 and 4) pierced with an opening traversed by the corresponding warp thread 5, it is understood that said lug 9 a will penetrate between the jaws 29 a qu 'it opens by force against the springs 30; as the latter return the jaws 29 to the closed position as soon as the ear 9 a has come out of the clamp 24, these jaws 29 a close on the wire 5 which is clamped firmly. The pick which has just been deposited is thus kept under tension.
  • the machine 53 While the shuttle in question finishes its race as far as the interior of the box 1, the machine 53 returns the clamp 24 to the maximum retraction position, so that the leaf 2 can carry out its usual tightening movement without being hampered by said clamp 24.
  • the machine 53 actuates the jack 22-23 and the corresponding jack 46 so that the clamp 24 envisaged comes affect the middle position.
  • the pusher 41 is moved axially by the dog 49, the jaws 29 open and the jaws 29 a release the weft thread 5 which has been previously relaxed as a result of the lateral movement of the aforementioned jaws.
  • the shuttle 9 is thus capable of depositing the pick in the crowd, without any risk of default.
  • the automatic device 53 brings the clamp 24 against the cross-member 19 and the device 8 is then ready for a new operation. It is the opposite device 8 which will take hold of the weft thread 5 for keeping it under tension.

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

Claims (10)

  1. Vorrichtung, welche auf der einen und auf der anderen Seite einer Webmaschine mit einem oder mehreren Schützen zwischen der in der Herstellung befindlichen Webkante und dem entsprechenden Schützenkasten im Hinblick auf ein Sicherstellen des Haltens der Spannung eines jeden der Schußfäden von dessen Austritt aus dem Fach angebracht ist, gekennzeichnet durch die folgende Kombination:
    - eine Reihe beweglicher Organe (23), deren Anzahl derjenigen der Schützen (9) der Webmaschine entspricht und die sich parallel zu den Kettfäden (4) erstrecken, wobei die einen im Verhältnis zu den anderen in vertikaler Richtung verschiebbar sind;
    - eine Klemme (24), die am Ende jedes beweglichen Organs (23) vorgesehen und derart angetrieben ist, daß sie den von dem Schützen (9) abzulegenden Schußfaden (5) ergreift und diesen freigibt, wenn derselbe Schützen aus dem entsprechenden Kasten (1) austritt;
    - Mittel (12 bis 15) zum Sicherstellen des Antriebs aller beweglichen Organe (23) in einer vertikalen Ebene im Hinblick auf ein selektives Heranführen einer der Klemmen (24) auf die Höhe der Weblade (2);
    - mit den beweglichen Organen (23) verbundene Mittel (22) zum selektiven Übertragen jeder der Klemmen (24) entweder in eine herausgehobene Stellung, in der die Klemme in Höhe der Weblade (2) zum Ergreifen des abzulegenden Schußfadens (5) angeordnet ist, oder in eine zurückgezogene Stellung, in der sich diese Klemme in Bereitschaft außerhalb der Hin- und Herbewegung der Weblade befindet, oder in eine mittlere Stellung, in der die Klemme mit einem geringen Abstand von dieser Weblade angeordnet ist, um ein Lockern des Schußfadens (5) zu gestatten, wenn der Schützen von neuem in das Fach eindringt; und
    - eine automatische Steuerung (53) zum Betätigen der vorerwähnten Mittel im Gleichtakt mit dem Antrieb der Lade (2) und der Schützenkästen (1).
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jedes eine Klemme tragende bewegliche Organ durch eine Stange eines pneumatischen Hebers (22, 23) gebildet wird, dessen Zylinder (22) an einem festen Gehäuse (10) gelenkig angebracht und bei unterschiedlichen, den verschiedenen Hebern folgenden Höhen durch einen Querträger (19) abgestützt ist, der den Mitteln (12 bis 15) ausgesetzt ist, wodurch der vertikale Antrieb der Heber sichergestellt ist.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Querträger (19) an die bewegbare Stange (15) eines pneumatischen Hebers (12 bis 15) angekuppelt ist.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß jede Klemme (24) einen Anschlag (25c) trägt, der dazu geeignet ist, in der herausgehobenen Stellung sich gegen eine Lagerfläche (52) zu stützen, die entsprechend diesem an der Weblade (2) vorgesehen ist.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß jede Klemme (24) zwei Klemmbacken (29) aufweist, die elastisch die eine gegen die andere angebracht sind und Spannbacken (29a) zum Festklemmen des Schußfadens (5) tragen, wobei die Spannbacken dazu geeignet sind, eine nach der anderen durch eine Öse (9a) abgerückt zu werden, welche seitlich an jedem Schützen (9) vorgesehen und zum Durchqueren mit dem Faden (5) durchbohrt ist.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß jede Klemme (24) derart angetrieben ist, daß sie quer zu den Kettfäden verschoben werden kann und so den Druck auf den Schußfaden (5) vermindert, wenn das die Klemme tragende bewegliche Organ (23) die mittlere Stellung erreicht und vorher ein Öffnen der betreffenden Klemme erfolgt.
  7. Vorrichtung nach Anspruch 5 und 6, dadurch gekennzeichnet, daß die zwei Klemmbacken (29) jeder Klemme (24) an den Hauptkörper (25) der jeweiligen Klemme durch Schwenkarme (26) angekoppelt sind, von denen wenigstens einer einen Betätigungsabsatz (26a) aufweist, der unter der Wirkung der Öffnungsmittel (41 bis 46) die Querverschiebung der Klemmbarken gegen eine elastische Rückholeinrichtung (34) sicherstellt.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der Hauptkörper (25) jeder Klemme (24) einen befestigten Anschlag (38) aufweist, der derart angetrieben wird, daß er mit Lagerflächen (29b) zusammenwirkt, die an den Klemmbacken (29) im Hinblick auf deren Abrücken und ein Öffnen ihrer spannbacken (29a) vorgesehen sind, wenn diese spannbacken ihre Querverschiebung beenden.
  9. Vorrichtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß mit jedem pneumatischen Heber (22, 23) ein Schwenkflügel (45) verbunden ist, der der Einwirkung eines Hebers (46) ausgesetzt und dazu geeignet ist, sich auf der Bahn einer Lasche (50) anzuordnen, die sich gleichzeitig mit dem entsprechenden beweglichen Organ (23) verschiebt, um dessen Verschiebung zu begrenzen und dieses so in die mittlere Stellung zu übertragen und gleichzeitig die Querverschiebung der entsprechenden Klemme (24) und das Öffnen derselben herbeizuführen.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß zwischen dem Schwenkflügel (45) und der Lasche (50) eine Sperrklinke (49) angeordnet ist, die bei einer Schwenkbewegung auf einen federnd gelagerten Rückholstößel (41) einwirkt und dazu dient, den Betätigungsabsatz (26a) der entsprechenden Klemme (24) anzutreiben.
EP90420106A 1989-02-28 1990-02-27 Vorrichtung zum selektiven Halten der Schussfadenspannung bei Webemaschinen Expired - Lifetime EP0385893B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8902870A FR2643658B1 (fr) 1989-02-28 1989-02-28 Dispositif pour le maintien selectif sous tension des fils de trame sur les metiers a tisser
FR8902870 1989-02-28

Publications (2)

Publication Number Publication Date
EP0385893A1 EP0385893A1 (de) 1990-09-05
EP0385893B1 true EP0385893B1 (de) 1992-12-30

Family

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EP90420106A Expired - Lifetime EP0385893B1 (de) 1989-02-28 1990-02-27 Vorrichtung zum selektiven Halten der Schussfadenspannung bei Webemaschinen

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US (1) US5050645A (de)
EP (1) EP0385893B1 (de)
DE (1) DE69000675T2 (de)
FR (1) FR2643658B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693483A1 (fr) * 1992-07-08 1994-01-14 Fabre Pierre Henri Dispositif pour le maintien sélectif sous tension des fils de trame sur les machines à tisser.
EP1811068B1 (de) * 2006-01-24 2009-06-17 Sultex AG Gesteuerte Fadenbremse

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650622A (en) * 1951-02-01 1953-09-01 Fred J Leard Filling end separator for multiple shuttle looms
DE1202740B (de) * 1959-02-20 1965-10-07 Valentin Patent Ges G M B H Hubvorrichtung fuer Webstuehle mit selbsttaetiger Schussspulenauswechselvorrichtung zum Anheben des von der Gewebekante zur Aussenschere fuehrenden Fadenstueckes
DE1232888B (de) * 1960-09-21 1967-01-19 Erhard Kenk Vorrichtung zum Abschneiden und Halten der Wechselfaeden bei Wechselwebstuehlen
US3452784A (en) * 1967-06-30 1969-07-01 Textile Specialties Inc Backstop for transfer tail clamping apparatus
BE704021A (de) * 1967-09-19 1968-02-01
DE1710220A1 (de) * 1967-11-06 1971-09-16 Bielefelder Webereien Ag Webautomat
US3613741A (en) * 1969-01-21 1971-10-19 Boris Kroll Jacquard Looms Inc Shuttleless loom
CH517195A (de) * 1970-06-19 1972-02-15 Rueti Ag Maschf Anordnung zum Halten von Schussfädenstücken zwischen dem Steigkasten einer Webmaschine und der Gewebekante
US3788362A (en) * 1972-12-21 1974-01-29 Blakely Ind Automatic loom filling winder
CH640016A5 (de) * 1979-10-01 1983-12-15 Saurer Ag Adolph Einrichtung zum zubringen eines schussfadens an einer schuetzenlosen webmaschine.
BE1000297A4 (nl) * 1987-02-09 1988-10-11 Wiele Michel Van De Nv Inslagvanginrichting voor grijperweefmachines en weefmachines voorzien van een dergelijke inslagvanginrichting.

Also Published As

Publication number Publication date
US5050645A (en) 1991-09-24
DE69000675D1 (de) 1993-02-11
DE69000675T2 (de) 1993-04-29
EP0385893A1 (de) 1990-09-05
FR2643658A1 (fr) 1990-08-31
FR2643658B1 (fr) 1991-05-31

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