EP0769581B1 - Dispositif pour réduire la charge d'un fil de trame devant être inséré dans la foule d'un métier à tisser - Google Patents

Dispositif pour réduire la charge d'un fil de trame devant être inséré dans la foule d'un métier à tisser Download PDF

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Publication number
EP0769581B1
EP0769581B1 EP96113964A EP96113964A EP0769581B1 EP 0769581 B1 EP0769581 B1 EP 0769581B1 EP 96113964 A EP96113964 A EP 96113964A EP 96113964 A EP96113964 A EP 96113964A EP 0769581 B1 EP0769581 B1 EP 0769581B1
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EP
European Patent Office
Prior art keywords
weft
thread
shed
tension sensor
thread tension
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
EP96113964A
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German (de)
English (en)
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EP0769581A1 (fr
Inventor
Heinz-Peter Löhr
Rainer Schuster
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.)
Lindauer Dornier GmbH
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Lindauer Dornier GmbH
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Publication date
Application filed by Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP0769581A1 publication Critical patent/EP0769581A1/fr
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Publication of EP0769581B1 publication Critical patent/EP0769581B1/fr
Anticipated expiration legal-status Critical
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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

Definitions

  • the invention relates to a device for reducing the load on the Shed of a weft to be entered according to the generic term of claim 1.
  • a device for controlling or regulating is known from EP 0 357 975 B1, which is considered to be the closest prior art the tension of weft threads consisting of each one in the shed weft brake type to be entered, each one Brake downstream weft monitor, which serves as a tension sensor and each tension sensor in connection with an electronic control unit is in which tension setpoints with those of each tension sensor, e.g. over the entry time, compared to the actual tension values and if there is a deviation, the weft brake in question sends a signal to Changes in braking force experienced.
  • the object of the invention is to influence the tension of the respective weft thread during the weft insertion in such a way that both tension peaks and tension troughs are largely avoided.
  • a further task consists in minimizing the number of weft monitors used as tension sensors, irrespective of the number of wefts to be entered, while guaranteeing a functionally reliable tension measurement based on tension.
  • the object is achieved by the features of the characterizing part of claim 1.
  • the large number of weft thread types to be entered into a shed depending on the pattern is assigned only a weft monitor acting as a thread tension sensor between the weft selector and the entrance to the shed in a first arrangement level.
  • the weft thread to be inserted is brought into contact with the thread tension sensor by its compulsory entrainment by the weft thread insertion member over the insertion time or in relation to the angle of rotation of the main loom shaft. The course of the thread tension is thus continuously recorded during the weft thread insertion.
  • This traction force curve is primarily determined by the dynamics of the weaving cycle and its absolute size is dependent on the braking force set for the weft thread brakes upstream of the sensor. It is further provided according to the invention that a second thread tension sensor is assigned in a second arrangement level between the first tension sensor and the weft thread selection device. Thus, while the first tension sensor is brought into contact with the weft thread due to the compulsory entrainment of the weft thread by the insertion member, the second thread tension sensor can be brought into contact with the second weft tension sensor on the way of the weft thread being passed from the weft selector to the weft insertion member.
  • the second tension sensor does not detect the course of the thread tension over the entry time or over a certain angle of rotation of the main shaft, but the course of the tension force when the weft thread is passed to the entry member. This ensures that the course of the thread tension between the thread brakes and the selection device is detected during the handover process and that the maximum and minimum tension can be reacted to.
  • the device according to the invention has the advantage over the prior art that only two thread tension sensors are required for the entirety of the weft thread types to be entered in the shed and therefore all tension values are directly comparable with one another. Another advantage is that all thread brakes can be compared with each other with the help of the two sensors. It is also advantageous that the braking force control on each weft brake can in principle be achieved with only the first thread tension sensor if the tension peak during acceleration of each weft thread is determined by a computing process from the course of the thread tension of a first weft thread entry.
  • the first weft sensor present in the first arrangement level is also effective as a weft monitor, because it monitors the weft for its tension over the entire width of the shed and the absence of a signal can be evaluated as a weft break.
  • a weft insertion element 3 which can be moved alternately into and out of the shed 1, is carried by a guide 4.
  • the guide 4 is designed similar to an angle profile and has an inner base surface 4a and an inner side guide surface 4b for the entry element 3.
  • the weft 6 to be entered into the shed 1 is placed over a weft brake 7 with an actuating element 7a and a weft selector 8 with a hand-in needle 8a to the insertion member 3 and held by a thread clamp, not shown, until the weft is held by the entry member 3 is included.
  • the hand-over needle 8a is one of a plurality of such needles of a weft selector 8.
  • the inserted weft thread 6 is beaten by a reed 9 at the binding point 10 of the fabric 11 by a pivoting movement according to the double arrow 12 to form the fabric 11 and cut by an installed pair of scissors 13.
  • a first thread tension sensor 14 is arranged on the hook guide 4 in a first arrangement level between the shed 1 or between a catch bar 15 of a hand-in needle 8a in such a way that after the picking up of the weft 6 by the entry element 3 and by subsequently inserting the weft 6 into the shed 1 each weft 6 is in contact with the sensor 14 for the time of entry and detects the thread tension prevailing in the weft 6 between the weft brake 7 and the entry member 3 and feeds it via line 16 to the electronic control and comparator unit 17 as an electrical signal. If the electronic comparator 17 detects deviations from a desired or desired thread tension, an electrical signal for regulating the braking force is triggered via the line 18 leading to an actuating element 7a of the weft brake 7.
  • the second thread tension sensor 19 is on in a second arrangement level the guide 4 is provided in an area between the first Thread tension sensor 14 and the weft selector 8.
  • the relevant weft thread 6 is fed through the needle 8a, it is temporarily deflected over the upper edge 4b 'of the side surface 4b of the guide 4, see FIG. 2.
  • the hand-over needle 8a is in position A with the weft thread.
  • the sensor 19 covers the area of the temporary deflection of each weft thread 6. Due to the deflection, the thread tensile force when the thread is passed can be detected within a certain angular range of the weaving machine main shaft, because the weft thread 6 rests in the area of the sensor 19 and is not moved.
  • the detected thread tensile forces are communicated via line 20 to the control and comparator unit 17 as electrical signals.
  • the sensor 19 can detect the tension caused by the acceleration of the weft 6 when the insertion member takes over the weft 6 due to the existing deflection.
  • the hand-over needle 8a is moved into position B after the weft thread 6 has been taken over by the entry member 3. As a result, the weft thread 6 loses contact with the sensor 19. Due to the movement of the entry element 3 into the shed 1, the weft thread 6 is applied to the sensor 14 with a time delay and likewise deflected there. He now has contact with the sensor 14 until the weft thread entry is complete and the reed 9 lifts the weft thread 6 from the sensor 14 due to its stop movement.
  • This procedure serves to optimize the braking force curve on a Rapier weaving machine.

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

Claims (2)

  1. Dispositif pour réduire la charge d'un fil de trame sur des métiers à tisser, en particulier sur des métiers à tisser à lance avec organes de stockage et de délivrance de fils de trame, comportant des freins de fil de trame, avec élément réglant, disposés, en direction de la foule, après l'organe de stockage et de délivrance des fils de trame, ainsi que des détecteurs de tension du fil pour saisir la force de tirage exercée sur le fil de trame et ainsi qu'un organe électronique de régulation et de comparaison qui forme un circuit de régulation avec chaque frein de fil de trame et avec les détecteurs de tension, et ainsi qu'un organe de choix du fil de trame pour faire passer, conformément au modèle, une pluralité de types de fil de trame à un organe d'insertion du fil de trame qui est guidé par un moyen placé à l'extérieur de la foule, caractérisé par le fait qu'à la pluralité des types de fil de trame (6) à insérer correspond, dans un premier plan du dispositif, après l'organe (8) de choix du fil de trame en direction de la foule (1), au moins un premier détecteur commun (14) de la tension du fil, dispositif dans lequel, dans ce plan du disposition, le fil de trame en question est, par suite de son entraínement par l'organe d'insertion (3), mis en contact avec le premier détecteur (14) de tension du fil, et que, dans un second plan du disposition, est disposé, dans la zone située entre l'organe (8) de choix du fil de trame et le premier détecteur (14) de la tension du fil, un second détecteur commun (19) de la tension du fil, le fil de trame en question étant mis en contact, dans ce plan du dispositif, avec le second détecteur (19) de la tension du fil, sur le chemin qu'il parcourt pour passer de l'organe (8) de choix du fil de trame à l'organe d'insertion.
  2. Dispositif selon la revendication 1, caractérisé par le fait que le détecteur (14) de la tension du fil opère sous forme d'un casse-fil de trame.
EP96113964A 1995-09-27 1996-08-31 Dispositif pour réduire la charge d'un fil de trame devant être inséré dans la foule d'un métier à tisser Expired - Lifetime EP0769581B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19535895 1995-09-27
DE19535895A DE19535895C1 (de) 1995-09-27 1995-09-27 Einrichtung zum Reduzieren der Belastung eines in das Webfach einer Webmaschine einzutragenden Schußfadens

Publications (2)

Publication Number Publication Date
EP0769581A1 EP0769581A1 (fr) 1997-04-23
EP0769581B1 true EP0769581B1 (fr) 1999-12-29

Family

ID=7773296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96113964A Expired - Lifetime EP0769581B1 (fr) 1995-09-27 1996-08-31 Dispositif pour réduire la charge d'un fil de trame devant être inséré dans la foule d'un métier à tisser

Country Status (4)

Country Link
US (1) US5725029A (fr)
EP (1) EP0769581B1 (fr)
JP (1) JP2859589B2 (fr)
DE (2) DE19535895C1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59604371D1 (de) * 1996-07-03 2000-03-09 Sulzer Textil Ag Rueti Vorrichtung an einer Greiferwebmaschine zum Erkennen eines fehlerhaften Schussfadeneintrages
IT1283381B1 (it) * 1996-07-31 1998-04-17 Roj Electrotex Nuova Srl Procedimento per controllare l'inserimento del filo di trama in un telaio di tessitura.
US6253795B1 (en) 1998-03-14 2001-07-03 Stephan Kuster Tensioning apparatus and method for an interlaced thread
DE59908000D1 (de) * 1998-09-02 2004-01-22 Sultex Ag Rueti Verfahren und System zum Eintragen eines Schussfadens in einer Greiferwebmaschine
EP0984089B1 (fr) * 1998-09-02 2003-12-10 Sultex AG Procédé et dispositif pour l'insertion d'un fil de trame dans un métier à tisser à griffes
DE29909242U1 (de) 1999-05-27 1999-09-16 Lindauer Dornier Gmbh, 88131 Lindau Schussfadenbremse für Webmaschinen
SE521331C2 (sv) * 1999-12-07 2003-10-21 Texo Ab Anordning vid fournissör
DE10218059A1 (de) * 2002-04-23 2003-11-13 Dornier Gmbh Lindauer Vorrichtung und Verfahren zur Regelung der Fadenspannung eines Fadens bei Textilverarbeitungsmaschinen
DE102007005859A1 (de) * 2007-02-06 2008-08-07 Siemens Ag Vorrichtung zum Erkennen eines mechanischen Defekts in einem Draht einer Oberleitung
DE102010047014A1 (de) 2010-09-30 2012-04-05 Lindauer Dornier Gmbh Ermittlung der Fadenzugkräfte in mehreren Schussfäden einer Webmaschine
ITUB20155266A1 (it) * 2015-10-30 2016-01-30 Roj S R L Freno elettromagnetico pilotato per il controllo della tensione dei fili di trama in macchine tessili
EP3967801A1 (fr) * 2020-09-11 2022-03-16 Picanol Dispositif et procédé de détection d'une tension dans un fil, et procédé de montage d'une unité de capteur

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE351446B (fr) * 1971-04-08 1972-11-27 S Rydborn
CH550879A (de) * 1972-10-21 1974-06-28 Loepfe Ag Geb Verfahren zum gleichzeitigen abtasten zweier schussfaeden an einer schuetzenlosen webmaschine.
CH634885A5 (de) * 1979-01-29 1983-02-28 Loepfe Ag Geb Elektronische abtastvorrichtung zur schussueberwachung an einer greiferschuetzenwebmaschine mit farbwechselvorrichtung.
BE1001513A3 (nl) * 1988-03-16 1989-11-14 Picanol Nv Weefmachine, met een verbeterde voeding voor de inslagdraden.
IT1227077B (it) * 1988-09-08 1991-03-14 Vamatex Spa Sistema per controllare la tensione della trama alimentata ad un telaio tessile senza navette.
IT1265071B1 (it) * 1993-05-18 1996-10-30 Nuovo Pignone Spa Dispositivo di regolazione continua della sensibilita' di tastazione, nel controllo di inserzione trama in un telaio tessile
BE1007850A3 (nl) * 1993-12-01 1995-11-07 Picanol Nv Werkwijze en weefmachine met een voeding voor inslagdraden.

Also Published As

Publication number Publication date
DE59604026D1 (de) 2000-02-03
JPH09209243A (ja) 1997-08-12
EP0769581A1 (fr) 1997-04-23
DE19535895C1 (de) 1996-06-13
JP2859589B2 (ja) 1999-02-17
US5725029A (en) 1998-03-10

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