EP0867545B1 - Vorrichtung zum automatischen Auswechseln des Warenbaums bei Webmaschinen - Google Patents

Vorrichtung zum automatischen Auswechseln des Warenbaums bei Webmaschinen Download PDF

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Publication number
EP0867545B1
EP0867545B1 EP19980105507 EP98105507A EP0867545B1 EP 0867545 B1 EP0867545 B1 EP 0867545B1 EP 19980105507 EP19980105507 EP 19980105507 EP 98105507 A EP98105507 A EP 98105507A EP 0867545 B1 EP0867545 B1 EP 0867545B1
Authority
EP
European Patent Office
Prior art keywords
roller
fabric
cloth beam
standby
edge
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
EP19980105507
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English (en)
French (fr)
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EP0867545A1 (de
Inventor
Mikhail Gendelman
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.)
Promatech SpA
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Promatech SpA
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Filing date
Publication date
Application filed by Promatech SpA filed Critical Promatech SpA
Publication of EP0867545A1 publication Critical patent/EP0867545A1/de
Application granted granted Critical
Publication of EP0867545B1 publication Critical patent/EP0867545B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/001—Cloth or warp beam replacement

Definitions

  • the present invention relates to a device for automatic replacement of the cloth beam in weaving looms.
  • the invention relates to a device which allows the cloth to be cut automatically when the cloth beam has reached the desired dimensions and said beam to be replaced with a new roller, with winding of the free edge of the new cloth being formed thereon.
  • the device according to the present invention allows the abovementioned operations to be performed without having to interrupt the normal operation of the loom and may be applied successfully both to horizontal looms and to vertically extending looms which therefore have the cloth beam in the top part of the loom itself.
  • One object of the present invention is to overcome this drawback by providing a device which is able to perform automatically replacement of the cloth beam with a new roller which, for this operation, does not require action on the part of any operator, except for removal of the full cloth beam.
  • Another particularly important object of the present invention is that of allowing the entire operation of replacement of the cloth beam to be performed without even minimum stoppage of the loom, which is thus able to maintain unchanged its full production output.
  • a further object of the present invention is that of providing an automatic device for replacement of the cloth which allows, where necessary, the operation of picking up of the full cloth beam to be delayed considerably with respect to the moment when it becomes full, for example for up to 30 minutes, without requiring either action on the part of an operator or interruption of the loom operation.
  • a last object of the present invention is that of allowing the operation of replenishing of the loom with the new roller to be performed during a time period different from that in which replacement of the cloth beam takes place, thus allowing optimization of the operator intervention time.
  • a device for automatic replacement of the cloth beam in a weaving loom according to claim 1 of the type in which the cloth beam is supported and driven by a pair of cylinders on which it rests with its peripheral surface, characterized in that it comprises a pair of cradle arms for supporting an empty standby roller, automatic means for cutting the fabric, means for guiding the edge of the cut fabric around said standby cloth roller and means for causing rotation of said roller, said cradle arms oscillating between a first position in which said standby roller is located alongside the cloth beam and a second position in which said roller is free to position itself so as to rest on said driving cylinders.
  • FIGs. 1 and 2 show the cloth beam 1 which rests on the pair of cylinders 2 and 3, respectively called a roll-pushing cylinder and a roll-winding cylinder, which perform and control winding thereof.
  • the two cylinders 2 and 3 are operated by the cloth-pulling cylinder 4, via the toothed chain 5, in accordance with the arrangement already described in WO97/13899 in the name of the same Applicant.
  • the device for automatic replacement of the cloth beam according to the present invention is arranged in this zone of the loom, namely in a lateral position with respect to the cloth beam 1 and the roll-winding cylinder 3.
  • This device consists of several cooperating parts, namely: means for supporting and moving a standby roller; means for guiding and cutting the fabric; means for guiding and winding the new free edge of the fabric around said standby roller. These means will be described separately and in detail below.
  • the means supporting and moving the standby roller 1R consist of a pair of cradle arms 6 arranged at the two ends of the loom, at a distance such as to be able to receive between them the standby roller 1R which rests with its central pin inside the free cradle-shaped ends 7 of the arms.
  • Said arms 6 are pivotably mounted in a central position on a common axis which, in the embodiment shown, coincides for the sake of constructional convenience with that of the roll-winding cylinder 3.
  • the ends of the arms 6 opposite to the cradle-shaped ends 7 are operated by two corresponding cylinder-and-piston units 8, which are preferably pneumatically operated, between a standby position 6A and a loading position 6C which can be clearly seen in Fig. 5.
  • the shape of the cradle arms 6 is such that, in the loading position 6C, they form a slightly inclined support surface for the pin of the roller 1R so as to allow disengagement of the roller IR from the arms 6 simply by means of the force of gravity, as will be explained more clearly below.
  • the means for guiding and cutting the fabric consist of a rectangular guide bar 9 with rounded edges, arranged immediately downstream of the roll-winding roller 3 and able to cause deviation of the path of the fabric being formed, away from the cloth beam 1 and towards the standby roller 1R, as can be clearly seen in Fig. 1.
  • the guide bar 9 accommodates internally the fabric cutting means which can be seen more clearly in Figs. 2, 3 and 4 and which consist of a carriage 10 sliding on the guide 9 and carrying a fixed triangular cutter 11 and a rotary blade 12.
  • the movement is imparted to the carriage 10 by an electric or pneumatic motor 13 via a belt 14 which extends in annular fashion across the whole width of the loom and has its ends fixed to the two sides of the carriage 10.
  • the rotary movement for the rotary blade 12 is obtained by means of engagement of a gearwheel 15, which is fixed thereto and coaxial therewith, with a rectilinear rack 16 contained inside the guide bar 9.
  • the arrangement of the fixed cutter 11 is such that its free end emerges from the edge of the guide bar 9 on which the fabric T rests.
  • the means for guiding and winding the free edge of the fabric T around the standby roller 1R consist of a first series of fixed belt units 17 and a second series of oscillating belt units 18 which are suitable for controlling winding of the fabric T in the bottom part and in the upper part of the roller 1R, respectively.
  • the belt units 17 extend between a rotating transverse shaft 19 which imparts movement to them and transmission bushes 21 mounted idle on a fixed shaft 20 so that the respective toothed belts 22 adhere elastically to the bottom part of the roller 1R.
  • the belt units 18 are arranged between the same bushes 20 onto which the belts 22 engage, from which therefore they receive movement, and transmission bearings 23 fixed to the shaft 20 by means of rigid brackets 24.
  • the shaft 20 - and together with them the brackets 24, the bearings 23 and hence the belt units 18 - are able to oscillate between a working position 23L and a rest position 23R (Fig. 5) as a result of the action of acylinder-and-piston unit 26.
  • a working position 23L the belts 25 of the units 18 adhere elastically to the upper surface of the standby roller 1R, in a manner entirely similar to that already seen for the belts 22 of the units 17.
  • the fabric T supplied from the weaving zone passes, in an entirely conventional manner, across the cloth-pulling cylinder 4 and from here reaches the roll-winding cylinder 3.
  • the fabric T no longer rests, following its usual path, in contact with the surface of the beam 1, but is deviated onto the bar 9 and then returns back onto the beam 1.
  • the fabric T is always kept in close contact and properly tensioned against the side edge of the bar 9 from which the triangular cutter 11 of the cutting device projects.
  • the cutting device is activated by operating the electric motor 13. Owing to the action of the endless belt 14 the cutting unit - formed by the carriage 10, the fixed cutter 11 and the rotary blade 12 - is rapidly displaced from one side to the other of the loom; during displacement the triangular cutter 11 grips the tensioned fabric and displaces it towards the inside of the bar until it is close to the rotary blade 12 where the fabric is cut with the maximum precision.
  • the rotary blade 12 has a polygonal shape in plan view, as can be seen in Fig. 3.
  • the cutting device is brought back into the rest position, while the tail end of the fabric is wound onto the beam 1 which continues to rotate about itself as a result of the action of the cylinders 2 and 3, until it is removed by a special bridge crane or truck and transferred to the packaging and despatch department.
  • a special bridge crane or truck and transferred to the packaging and despatch department.
  • the newly formed fabric therefore starts to be wound uniformly onto the replacement roller 1R, while the latter is in a lateral position - with respect to the ordinary position still occupied by the full cloth beam 1 - determined by the cradle arms in the position 6A shown in Fig. 5.
  • the elasticity of the belts 22 and 25 and the possibility of performing gradual clockwise movement of the shaft 20, preferably in contrast with spring means, as winding of the fabric T onto the roller 1R proceeds, allows the weaving operation to be continued, keeping the roller 1R in this position even for very long periods of time, which can vary depending on the type of fabric being processed, but which are generally longer than at least 30 minutes.
  • the operator therefore has a considerable amount of time available to plan carefully the operation of removing the full cloth beams 1 from the various working looms, avoiding any undesirable stoppage of the looms, since operation continues undisturbed with winding of the fabric onto the rollers 1R in the standby position.
  • the operator performs displacement of the arms 6 which are displaced from the position 6A into the position 6C - an operation, this, which can obviously also be performed automatically by the control panel of the carriage or the bridge crane.
  • the roller 1R is subjected on the one hand to the force of gravity, which pushes it along the inclined surface in the direction of the cylinders 2 and 3, while on the other hand it is retained by the fabric T which exerts a pulling force in the direction of the arrow F according to Fig. 5.
  • the pulling force exerted by the fabric T therefore prevents the roller 1R from sliding with excessive speed along the inclined surface formed by the arm 6 in the position 6C and allows it to come into contact in a sufficiently gentle manner with the cylinder 2 and therefore - after the arm 6 has been brought again into the position 6A - into contact with the cylinder 3,
  • the cylinder 1R has thus occupied its ordinary operating position, without the loom weaving operations or the fabric winding operations having been interrupted at all, providing moreover the operator with a long time during which to plan, more carefully and efficiently, removal of the full cloth beam, thus achieving the main objects of the invention.
  • Replenishing of the loom with the empty replacement roller may therefore be performed at any time during winding of the cloth beam 1, since this operation merely requires positioning of the roller 1R on the cradle-shaped ends 7 of the arms 6. It is obvious, therefore, that, from this point of view as well, the desired objects of the invention have been achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Replacement Of Web Rolls (AREA)

Claims (13)

  1. Vorrichtung für den automatischen Austausch eines Weberbaums in einer Webmaschine von der Art, bei der der Weberbaum (1) von einem Paar von Zylindern (2, 3) getragen und angetrieben wird, auf denen er mit seiner Umfangsfläche ruht, dadurch gekennzeichnet, daß sie ein Paar von Kipphebeln (6) aufweist, die auf den bei Seiten der Webmaschine angeordnet sind, zum Tragen einer Ruhe-Tuchwalze (1R), die parallel zu dem Weberbaum (1) angeordnet ist, automatischen Mitteln (9-12) zum Schneiden des Gewebes (T), Mitteln (27, 22, 25) zum Führen des Randes des geschnittenen Gewebes (T) um die Ruhewalze (1R) und Mitteln (17, 18) zum Verursachen einer Drehung der Walze (1R), wobei die Kipphebel (6) zentrisch auf einer Achse parallel zu der Achse der Ruhewalzen angelenkt sind, um in Ebenen quer zu der Achse der Walze zu schwingen zwischen einer ersten Position, in der die Ruhewalze (1R) entlang des Weberbaums (1) angeordnet ist und in der das anfänglich Aufwickeln des Gewebes (T) stattfinden kann und einer zweiten Position, in der die Walze frei ist, sich selbst zu positionieren, um auf den Antriebszylindern (2, 3) zu ruhen.
  2. Vorrichtung nach Anspruch 1, wobei die Kipphebel (6) freie wiegenförmige Enden (7) haben, auf denen die Enden eines axialen Stifts der Ruhewalze (1R) ruht.
  3. Vorrichtung nach Anspruch 2, wobei die Schwingung der Kipphebel (6) durch ein Zylinder- und Kolben-Mittel betrieben wird, das auf ihre den wiegenförmigen Enden (7) gegenüberliegenden Enden wirkt.
  4. Vorrichtung nach Anspruch 1, wobei die Achse, auf der der Kipphebel (6) angelenkt ist, mit der Achse einer (1) der Antriebszylinder (2, 3) des Weberbaums (1) übereinstimmt.
  5. Vorrichtung nach Anspruch 1, wobei das Mittel zum automatischen Schneiden des Gewebes einen Querriegel (9) aufweist, der sich über die gesamte Breite der Webmaschine erstreckt und wobei auf einem Rand des Querriegels der Weg des Gewebes (T), das zu dem Weberbaum (1) geführt wird, weg von dem Baum und in Richtung auf die Ruhewalze (R) abgelenkt wird, und eine Einrichtung (10-12) zum Schneiden des Gewebes (T), die entlang des Randes verschiebbar ist, aufweist.
  6. Vorrichtung nach Anspruch 5, wobei die Schneideeinrichtung im Inneren des Riegels (9) angeordnet ist und einen festen, dreieckigen Schneider (11) aufweist, dessen Spitze von dem Rand des Riegels (9), auf den das Gewebe (C) abgelenkt wird, und eine Drehschneide (12) mit dem Schneider (11) zusammenwirkt.
  7. Vorrichtung nach Anspruch 6, wobei die Schneideeinrichtung auf einem Wagen (10) befestigt ist, der entlang einer Führung, die sich längs des Riegels (9) erstreckt, beweglich ist und auf diesem durch einen Endlosgurt (14) gezogen wird, der von einem elektrischen oder pneumatischen Motor (13) angetrieben wird.
  8. Vorrichtung nach Anspruch 7, wobei die Drehschneide (12) an einem Zahnrad (15), das mit diesem koaxial ist, befestigt ist, wobei das Zahnrad mit einem zahnstangenartig profilierten Teil (16) kämmt, der sich längs des Riegels erstreckt.
  9. Vorrichtung nach einem Ansprüche 6 - 8, wobei die Drehscheibe (12) ein polygonales Profil hat.
  10. Vorrichtung nach Anspruch 1, wobei das Mittel zum Führen des Randes des geschnittenen Gewebes (11) um die Ruhewalze (1R) und das Mittel zum Verursachen einer Drehung der Ruhewalze aus einer Mehrzahl von Gurteinheiten besteht, die in Kontakt mit dem ansteigenden Halbzylinder der Walze (1R) ist.
  11. Vorrichtung auch Anspruch 10, wobei die Gurteinheiten untere feste oder elastisch fixierte Einheiten (17) und untere Einheiten (18) aufweist, wobei die unteren Einheiten zwischen einer oder mehreren Arbeitspositionen, in der die Einheiten mit der lateralen Fläche der Walze (1R) in Kontakt sind und einer Ruheposition, in der die Einheiten (18) dazu ausgebildet sind, sich weg von der Fläche der Walze (1R) zu bewegen, beweglich sind.
  12. Vorrichtung nach einem der Anspruch 5 - 11, wobei eine geneigte Platte (27) zum Führen des freien Endes des Gewebes (T) unmittelbar nach dem Schneidvorgang, die zwischen dem Rand des Riegels (9), der das Gewebe (T) ablenkt, und dem Bodenteil der Ruhewalze (1) angeordnet ist.
  13. Vorrichtung nach einem der vorangehenden Ansprüche, wobei die Ruhewalze in den ersten Positionen die Fähigkeit hat, das Gewebe etwa für einen 30-minütigen Betrieb der Webmschine aufzunehmen.
EP19980105507 1997-03-27 1998-03-26 Vorrichtung zum automatischen Auswechseln des Warenbaums bei Webmaschinen Expired - Lifetime EP0867545B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI970727 1997-03-27
IT97MI000727A IT1290492B1 (it) 1997-03-27 1997-03-27 Dispositivo per la sostituzione automatica del subbio portapezza in telai di tessitura

Publications (2)

Publication Number Publication Date
EP0867545A1 EP0867545A1 (de) 1998-09-30
EP0867545B1 true EP0867545B1 (de) 2002-01-09

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Application Number Title Priority Date Filing Date
EP19980105507 Expired - Lifetime EP0867545B1 (de) 1997-03-27 1998-03-26 Vorrichtung zum automatischen Auswechseln des Warenbaums bei Webmaschinen

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EP (1) EP0867545B1 (de)
DE (1) DE69803106T2 (de)
IT (1) IT1290492B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3876868D1 (de) * 1987-06-16 1993-02-04 Sulzer Ag Verfahren zum anwickeln eines warenbaumes in einem transportgeraet und transportgeraet dafuer in der weberei.
BE1000684A4 (nl) * 1987-06-29 1989-03-07 Picanol Nv Werkwijze en inrichting om een van weefsel voorziene doekboom te vervangen door een lege doekboom en hulpapparaat hierbij aangewend.
CH682927A5 (de) * 1990-01-24 1993-12-15 Sulzer Ag Warenbaumwechsler an Webmaschine.
BE1004499A3 (nl) * 1990-06-19 1992-12-01 Picanol Nv Werkwijze en inrichting voor het vervangen van een doekboom bij weefmachines.

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Publication number Publication date
IT1290492B1 (it) 1998-12-04
DE69803106D1 (de) 2002-02-14
EP0867545A1 (de) 1998-09-30
ITMI970727A1 (it) 1998-09-27
DE69803106T2 (de) 2002-08-22

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