EP1255885A1 - Procede pour devier une portee de fils de chaine pendant le tissage, et metier a tisser - Google Patents

Procede pour devier une portee de fils de chaine pendant le tissage, et metier a tisser

Info

Publication number
EP1255885A1
EP1255885A1 EP01915225A EP01915225A EP1255885A1 EP 1255885 A1 EP1255885 A1 EP 1255885A1 EP 01915225 A EP01915225 A EP 01915225A EP 01915225 A EP01915225 A EP 01915225A EP 1255885 A1 EP1255885 A1 EP 1255885A1
Authority
EP
European Patent Office
Prior art keywords
warp thread
deflecting
weaving
warp
thread sheet
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
EP01915225A
Other languages
German (de)
English (en)
Other versions
EP1255885B1 (fr
Inventor
Piet Verdiere
Geert Ostyn
Bart Beernaert
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.)
Picanol NV
Original Assignee
Picanol NV
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 Picanol NV filed Critical Picanol NV
Publication of EP1255885A1 publication Critical patent/EP1255885A1/fr
Application granted granted Critical
Publication of EP1255885B1 publication Critical patent/EP1255885B1/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
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for
    • D03C13/02—Shedding mechanisms not otherwise provided for with independent drive motors
    • D03C13/025—Shedding mechanisms not otherwise provided for with independent drive motors with independent frame drives

Definitions

  • the invention relates to a method for deflecting a warp thread sheet during weaving with a weaving machine and a weaving machine.
  • the invention has for its object to improve a method and a weaving machine of the type mentioned in such a way that an improvement in the quality of the fabric produced can be achieved.
  • This object is achieved in that the warp thread sheet is deflected between a stop line for a fabric to be woven and shedding means.
  • the deflection of the warp thread sheet in the section between the stop line and the shedding means means that the warp thread sheet can be brought into a position which deviates from the position which is brought about by the shedding material means. By changing the position, it is possible to influence the tissue quality.
  • the deflection of the warp thread family takes place at changeable times and / or for changeable time periods and / or with changeable paths during a weaving cycle.
  • This makes it possible to bring the section of the warp thread array adjoining the stop line into a predetermined position at predetermined times within a weaving cycle, which position is independent of the position of the shedding means.
  • the course of movement can be freely selected and specified. For example, it can be selected independently of the course of movement of the sley and / or the shedding means and depending on the weaving speed of the weaving machine.
  • the warp threads are deflected into a predetermined position while a weft thread is attached to the fabric. It can be assumed that the weft of a weft thread and thus the fabric formation take place evenly, so that a better fabric quality is achieved if the position of a warp thread group near the fabric is predetermined during the beating of a weft thread.
  • This predetermined position can be chosen so that a weft thread can be easily struck against the fabric, so that a full fabric, a heavy fabric or a high-density fabric such as for example denim.
  • the improved weft threading also has the advantage that so-called attachment strips can be avoided. Such attachment strips can arise in a fabric if the weft threads are struck against the fabric at an irregular height, in particular at a point where the weaving machine starts again after it has come to a standstill.
  • the warp threads are held in a deflected position for a predetermined period of time during the attachment.
  • the warp thread coulter which is also additionally tensioned, is held in a predetermined position during the weft thread weft, which promotes problem-free attachment to the fabric. Therefore, the invention is particularly suitable for use in weaving the aforementioned fabrics.
  • the warp threads are deflected during the attachment essentially up to a crossing plane in which warp thread sets cross when changing shed.
  • the resulting increase in tension and the position of the warp thread coulter bring advantages for a problem-free weft thread.
  • the position in the vicinity of the crossing plane is advantageous in order to prevent warp threads from getting caught when the warp thread sets are crossed.
  • the warp thread sheet is deflected into a predetermined position, while auxiliary elements are inserted through the warp thread sheet into a shed.
  • the auxiliary elements to be introduced for example relay nozzles for air weaving machines or hook-shaped guide elements for rapier weaving machines, can be designed in such a way that they are Damage to the warp threads can be moved through the warp thread sheet.
  • the deflection of the warp thread sheet is matched to the movement of the associated shed forming means in such a way that the warp threads in this warp thread sheet are kept under tension during opening or closing of a shed.
  • the object is achieved in that the means for deflecting are arranged between a stop line of a fabric and shed forming means. In this way, not only the tension of the warp thread coulter can be adjusted, but also the position of the section of the warp thread coulter that adjoins the stop line.
  • the means for deflecting are provided with a controllable drive. This makes it possible to design the course of movement of the means for deflecting as desired and to adapt it to the course of movement of the sley and / or to the course of movement of the specialist training means and also to select them out of phase.
  • the means for deflecting have a frame which is guided in a guide block in which frames of heald frames are also guided. This is a particularly beneficial one
  • Embodiment since such guide blocks are usually already present in a weaving machine. It is within the scope of the invention to utilize this advantage of the arrangement of means for deflection even if these means are then arranged between the technical training means or even in the back compartment. In this case it is only possible to tension the warp thread in question, but the advantage according to the invention of the favorable arrangement of the means already becomes get to deflect. It is easily possible to equip already existing weaving machines with the means for deflecting, for example by using these means instead of a heald frame or by expanding the already existing guide blocks by a guide for the frame of the means for deflecting.
  • FIG. 1 shows a weaving machine equipped according to the invention with means for deflecting a warp thread group
  • FIG. 8 is a view similar to FIG. 1 of a modified embodiment
  • Fig. 10 is a view of a modified embodiment of a frame of means for deflection.
  • the weaving machine shown schematically in FIG. 1 has a warp beam 5, ' from which warp threads via a match beam 6 to a stop line 7 for weft threads and then as fabric 8 run over a breast tree 9 to a goods tree 10.
  • the warp threads are pulled apart across the width of the weaving machine in the form of warp thread sets 1, 2, 3 and 4, so that a shed 45 is formed.
  • Weft threads are inserted into the shed 45, which are then attached to the fabric 8 by means of a reed 12 arranged on a sley 11 on the stop line 7.
  • the shed 45 is formed from four warp thread sets 1, 2, 3, 4, to which shed forming means in the form of heald frames 13, 14, 15, 16 are assigned in the exemplary embodiment.
  • Each of these heald frames 13, 14, 15, 16 consists of a frame, between the transverse legs of which a plurality of strands 17 are arranged, each of which has a thread eye 27 through which a warp thread is guided.
  • the number of warp sets 1 to 4 corresponds to the number of heald frames 13 to 16.
  • the weaving machine has a means 18 for deflecting the respective lower warp thread sheet, in the exemplary embodiment the warp thread sheet 2.
  • the means 18 is arranged between the stop line 7 of the fabric 8 and shed forming means, preferably in a position between the reed 12 and the heald frames 13 to 16 .
  • This means 18 is is 21 arranged in the illustrated embodiment, a rod which extends transversely to the running direction of the warp threads and between the two side arms of a frame 20 '19 (Fig. 2).
  • the side legs 20, 21 are connected by means of an upper cross leg 22 and a lower cross leg 23, so that the frame 19 corresponds in shape to the frame of the heald frames 13 to 16.
  • the rod of the deflection element 18 is connected to the lower cross leg 23 of the frame 19 by means of connecting elements 24.
  • the frame 19 of the means 18 for A ⁇ slenken the lower warp thread sheet 2 is guided with its side legs 20, 21 in guides 25 which in Fig. 3 are shown.
  • These guides 25, which are located on ' both sides of the frame 19, are contained in a guide block 26 which has further guides 28 to 33 for heald frames 13 to 16.
  • seven guides 25, 28 to 33 which are identical to one another, but only four heald frames 13 to 16 are provided in the guide block 26.
  • the guide 25 is located in the ends of the guide blocks 26 facing the reed 12.
  • the means 18 for deflecting the respective lower warp thread sheet in the illustration according to FIG.
  • the heald frames 13 to 16 can be moved back and forth in the same direction.
  • the heald frames 13 to 16 and the means 18 for deflecting the respective lower warp thread sheet are provided with a drive 34, which in the illustrated embodiment consists of a drive motor 36, on the drive shaft 44 of which a cam system 35 for the means 18 for deflecting the lower warp thread sheet as well Cam systems 38 to 43 are arranged, which are associated with heald frames.
  • the drive motor 36 is connected to a controller 37 and can move independently of the movement of the sley 11.
  • cam systems 35 and 38 to 43 are designed and arranged in such an angular position on the shaft 44 of the drive motor 36 that both the means 18 for deflecting the respective lower warp thread array and the heald frames 13 to 16 each carry out a preselected course of movement.
  • FIGS. 1 and 4 The method of operation in the weaving machine according to the invention results from FIGS. 1 and 4 to 7.
  • the crossbar of the means 18 for deflecting the lower warp thread sheet 2 is still at a distance from this warp thread sheet 2, which is connected to the warp thread sheets 1, 3 and 4 forms the shed 45 for inserting a weft thread.
  • weaving compartments are formed one after the other, each with a different heald frame having the takes the lower position while the other three heald frames are in the upper position.
  • the shed is opened and closed again during the insertion of a weft thread, so that the formation of the following shed is started before a weft thread is struck, ie the shed 45 is already partially closed again.
  • the means 18 for laying out the lower warp thread sheet 2 is also raised by means of the cam system 35, so that it comes into contact with the warp thread sheet 2 after the heald frame 14 has already been moved upwards a little. Thereafter, the shed is closed further, the means 18 for deflecting the warp sheet 2 being raised faster than the weaving shank 14, so that the warp thread tension in the warp sheet 2 is not significantly changed while the weaving shank 14 is moving upward.
  • the section 46 of the warp thread sheet which begins at the stop line 7 of the fabric and extends to the means 18 for deflecting the warp thread sheet is changed in its position.
  • This section 46 is brought into a predetermined position in this way, in which a weft thread is struck by means of the reed 12 on the stop line 7 of the fabric 8 (FIG. 5).
  • This predetermined position is preferably close to the crossing plane 47, ie the plane in which the warp thread sheet 2 and the warp thread sheet 3 intersect.
  • This crossing plane 47 is preferably slightly below the plane of a bisector of the angle formed by a fully open shed starting from the stop line 7.
  • This position is something of the means 18 for deflecting below the junction plane 47 is advantageous since the warp 2 on the one hand optimally tensioned when striking a weft thread and on the other hand, the subsequent warp 3 at 'the formation of the next shed only from the Means 18 for deflection is supported after the warp thread sets 2 and 3 have already crossed.
  • the means 18 for deflecting initially moves downwards somewhat more slowly than the heald frame 15, so that the tension in the warp thread sheet 3 increases rapidly, so that the warp thread sets 2 and 3 can be separated quickly and a clean shed 45 is formed (FIG. 6 ). Subsequently, the means 18 for deflection moves downward faster than the heald frame 15, so that the means 18 comes out of engagement with the warp thread sheet 3 when the heald frame 15 assumes its lower position (FIG. 7). This has the advantage that the warp thread tension in the warp thread family 3 is not increased by means of the deflection means 18 when the warp thread family 3 has assumed its lowest position.
  • a different heald frame is used in subsequent weaving cycles - for example, the heald frame 13, the heald frame 16 and then the heald frame again
  • the shape of the cam system 35 determines the course of movement of the means 18 for deflecting the respective lower warp thread group as well as the relative movements that take place in relation to the heald frames 13 through 16.
  • a Drive shaft provided, which is driven by the main drive motor of the loom, which also drives the sley 11.
  • the course of movement of the means 18 for deflecting can be out of phase with the course of movement of the sley 11.
  • the means 18 for deflection and the heald frames 13 to 16 are driven by means of linear motors 49 to 53, which are each controlled by a controller 37 with a predeterminable course of movement.
  • the means 18 for deflection By means of an independent drive for the means 18 for deflection, for example the linear motor 49 according to FIG. 8, it is possible to adapt the course of movement of the means 18 for deflection to the weaving speed.
  • the control unit 37 and the controllable linear motor 49 By means of the control unit 37 and the controllable linear motor 49, the means 18 can be brought into a predetermined position during the setting of a weft thread, which is dependent on the weaving speed, which for its part also depends on the weft thread to be processed.
  • a position near the crossing plane 47 can be selected for the duration of the attack at a low weaving speed, while a position which is further away from the crossing plane 47 can be selected at a high weaving speed . It is also possible to specify a changed position for the section 46 when a weft thread is struck in a start-up phase "when it is switched on again. It is also possible that the means 18 for deflecting a warp thread group is not activated during normal weaving operation with a predetermined weaving speed , however, it is active during slow weaving or when starting up after the weaving machine is switched on again until normal weaving speed is reached, and brings the section 46 of the lower warp thread sheet into a predetermined position during the beating.
  • the means 18 for deflecting can then cooperate with a warp thread group at certain times in order to be able to open the previous shed at low speed without problems, whereby warp threads are prevented from getting caught.
  • the means 18 for deflecting the lower warp thread sheet brings the section 46 of the warp thread sheet running to the stop line 7 into a predetermined position and for a predetermined time period.
  • the predetermined point in time is the point in time at which one or more auxiliary elements 48, which move together with the sley 11, are inserted through the warp thread sheet 2 into the shed 45.
  • This warp thread sheet 2 is simultaneously tensioned by means 18 for deflecting.
  • auxiliary elements 48 are, for example in the case of an air jet weaving machine, relay nozzles or relay nozzles, a lip of a profile reed or a weft monitor. In the case of a rapier weaving machine, these are, for example, guide hooks for a rapier belt.
  • specifying a defined position for section 46 is advantageous for the insertion of any auxiliary element.
  • a further means 55 for deflecting is provided, which is arranged, for example, in the guide 28 of a guide block 26 according to FIG. 3.
  • the means 18 and 55 can optionally, for a predetermined time and / or for a predetermined duration, for for example, for the duration of striking a weft thread, interact with the lower warp thread sheet 2.
  • the means 55 is, for example, part of a frame 56 shown in FIG. 10, which is formed from two side legs 20, 21, an upper cross leg 22 and a cross strut, which forms the means 55 for deflecting with its upper edge and which on the two side legs 20 , 21 is held.
  • either one of the two means 18 or 25 can cooperate with the lower warp thread sheet in order to bring the lower warp thread sheet into a corresponding predetermined position and / or to tension it.
  • both means 18 and 55 work together with the lower warp thread sheet at the same time, for example to increase the tension of the lower warp thread sheet even more. If both means 18 and 55 co-operate with the lower warp thread sheet at the same time, the position of the section 46 is determined by the means 18, while the other means 55 only serves to increase the warp thread tension in this warp thread sheet.
  • the activity of the means 18 or 55 for deflecting the lower warp thread sheet is not only limited to the time when a weft thread is struck or the insertion of an auxiliary element 48 through the warp thread sheet into a shed. It can also be advantageous at other times within a weaving cycle to actuate the deflection means and to bring the lower warp thread family into a predetermined position. For example, by means of the element 18 or 55 for deflecting the section 46 lower warp thread sheet can be brought into a particularly suitable position for the insertion of the weft thread into the shed.
  • the tension in the warp thread sheet can be increased, in particular when a weft thread is struck, but it is not possible to bring the lower warp thread sheet in the area of the stop line into a position that is independent of the shedding means.
  • means for deflecting a warp thread family on the side of the guide block 26 facing the match tree 6. In this case too, only the tension of the warp thread coulter can be checked, but the advantage is used that the guides 25, 28 to 33 of a guide block 26 can also be used for such means for deflecting, provided the means for deflecting are designed in accordance with heald frames.
  • means 18 and / or 25 can also be used to deflect the lower warp thread family. These are then advantageously arranged between the stop line of the fabric and the portion of the harness cords. For example, a shortened guide block with guides 25 and / or 28 is then arranged in this area. If, during weaving, the lower warp thread family is not raised with every stop or weft insertion, there is a risk that the means 18 for deflecting the warp threads of the lower warp thread families will lead to an excessive increase in tension in the warp threads, which can result in warp thread breaks.
  • the invention is preferably suitable for weaving machines which weave with the above-mentioned 3/1 weave, a 1/1 weave, a 2/1 weave, a 4/1 weave or generally with an n / 1 weave, ie in which the lower warp thread coulter is moved upwards with every stop or weft insertion.
  • a further deflection means 57 act briefly on the upper warp thread groups at a predetermined point in time within the weaving cycle. This can be, for example, the point in time immediately after the weft insertion and before the downward movement of one of the upper warp thread groups.
  • the portion of the warp thread sheets 1, 3 and 4 starting from the stop line 7 is brought into a predetermined position, which makes it easier for the warp thread sheet to be moved downward to become detached from the warp thread sheets remaining above. In this way it can be avoided that the warp threads of the individual warp thread sets get caught with each other, which again benefits the quality of the fabric.
  • several such means 57 are provided for deflecting.
  • the means 57 for deflecting is actuated by means of a drive 58 which is connected to a controller 37.
  • a drive 58 which is connected to a controller 37.
  • Linear motors, compressed air cylinders or other drive elements can be provided as the drive means.
  • the means 57 is arranged between the stop line 7 of the fabric 8 and the shed forming means 13 ' to 16. It when it is in a position between the stop line 7 of the Fabric 8 and the swung-back reed 12 attacks the upper warp thread sheet.
  • the means 57 must be naturally released when struck a weft yarn from the path of movement 'of the reed 12th
  • the exemplary embodiments are particularly suitable for weaving with an n / 1 weave.
  • the invention can also be used in a modified manner for weaving with a 1 / n weave, in which case the upper warp thread sheet is expediently deflected by means of the function of the means 18 and / or 55 corresponding means which are supplied to this warp thread sheet from above.
  • means with the function of means 57 can also be delivered to the lower warp thread family.
  • the method according to the invention and the weaving machine according to the invention can be used to produce fabrics of high quality.
  • the means for deflecting the warp thread coulter or warp thread coulters can be easily installed in any machine. Existing machines can also be retrofitted without major problems.
  • the invention is of course not limited to the exemplary embodiments shown and described. Of course, changes can be made to the exemplary embodiments within the scope of the claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)

Abstract

Selon l'invention, pour dévier une portée de fils de chaîne (2) dans un métier à tisser, on utilise un moyen (18) qui est guidé dans des moyens de guidage (26) qui guident eux-mêmes des lames (13, 14, 16). Ce moyen de déviation positionne une section (46) de la portée de fils de chaîne (2) qui commence à la ligne de butée (7) du tissu (8).
EP01915225A 2000-02-14 2001-02-12 Procede pour devier une portee de fils de chaine pendant le tissage, et metier a tisser Expired - Lifetime EP1255885B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE2000/0120A BE1013285A3 (nl) 2000-02-14 2000-02-14 Werkwijze en inrichting voor het steunen van een schaar kettingdraden bij een weefmachine.
BE200000120 2000-02-14
PCT/EP2001/001516 WO2001059192A1 (fr) 2000-02-14 2001-02-12 Procede pour devier une portee de fils de chaine pendant le tissage, et metier a tisser

Publications (2)

Publication Number Publication Date
EP1255885A1 true EP1255885A1 (fr) 2002-11-13
EP1255885B1 EP1255885B1 (fr) 2004-12-01

Family

ID=3896412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01915225A Expired - Lifetime EP1255885B1 (fr) 2000-02-14 2001-02-12 Procede pour devier une portee de fils de chaine pendant le tissage, et metier a tisser

Country Status (9)

Country Link
US (1) US6953067B2 (fr)
EP (1) EP1255885B1 (fr)
CN (1) CN1213180C (fr)
AT (1) ATE283939T1 (fr)
AU (1) AU2001242382A1 (fr)
BE (1) BE1013285A3 (fr)
DE (1) DE50104683D1 (fr)
ES (1) ES2232605T3 (fr)
WO (1) WO2001059192A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040230328A1 (en) * 2003-03-21 2004-11-18 Steve Armstrong Remote data visualization within an asset data system for a process plant
DE10358535A1 (de) 2003-12-13 2005-07-14 Henkel Kgaa Hybridenzyme mit kationischer Bindedomäne
US7806149B2 (en) * 2006-09-28 2010-10-05 Textilma Ag Shedding apparatus for a weaving machine, in particular for a ribbon weaving machine
US8880410B2 (en) * 2008-07-11 2014-11-04 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for generating a bandwidth extended signal
US8256364B2 (en) 2009-11-03 2012-09-04 Columbia Insurance Company Methods and devices for controlling the tension of yarn in a tufting machine
US8430043B2 (en) 2010-10-28 2013-04-30 Columbia Insurance Company Methods and devices for controlling a tufting machine for forming tufted carpet

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1749123A (en) * 1928-08-28 1930-03-04 Draper Corp Shed-diverting means for looms
CS149784B1 (fr) * 1970-04-28 1973-08-23
US3943976A (en) * 1971-10-06 1976-03-16 Maquinaria Textil Del Norte De Espana S.A.-Matesa Continuous insertion weaving machine
CH543621A (de) * 1972-04-14 1973-10-31 Rueti Ag Maschf Einrichtung zum Bilden von Gewebebindungen
US4122871A (en) * 1976-07-07 1978-10-31 Mcginley Thomas F Method of weaving and apparatus therefor
US4253498A (en) * 1979-03-20 1981-03-03 Vinicio Luchi Travelling wave shedding looms relative to the shuttle loading system
JPS5678888A (en) 1979-12-03 1981-06-29 Mitsubishi Precision Co Ltd Patternngenerator using lighttpen
US4425946A (en) * 1980-10-16 1984-01-17 Mcginley Mills, Inc. Weaving method and apparatus
EP0350447B1 (fr) * 1988-07-08 1992-03-25 GebràœDer Sulzer Aktiengesellschaft Procédé de commande de la tension de la chaîne et metier à tisser avec dispositif de tension de la chaîne
EP0456599B1 (fr) * 1990-05-11 1998-05-27 Sulzer RàœTi Ag Métier à tisser multiphasé à foule linéaire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0159192A1 *

Also Published As

Publication number Publication date
EP1255885B1 (fr) 2004-12-01
ES2232605T3 (es) 2005-06-01
ATE283939T1 (de) 2004-12-15
CN1213180C (zh) 2005-08-03
US20030019534A1 (en) 2003-01-30
US6953067B2 (en) 2005-10-11
WO2001059192A1 (fr) 2001-08-16
DE50104683D1 (de) 2005-01-05
AU2001242382A1 (en) 2001-08-20
CN1401026A (zh) 2003-03-05
BE1013285A3 (nl) 2001-11-06

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