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EP0478986B1 - Weft selecting and feeding device for looms - Google Patents

Weft selecting and feeding device for looms Download PDF

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Publication number
EP0478986B1
EP0478986B1 EP91115150A EP91115150A EP0478986B1 EP 0478986 B1 EP0478986 B1 EP 0478986B1 EP 91115150 A EP91115150 A EP 91115150A EP 91115150 A EP91115150 A EP 91115150A EP 0478986 B1 EP0478986 B1 EP 0478986B1
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EP
European Patent Office
Prior art keywords
thread
belt
drive wheel
regulators
belts
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
EP91115150A
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German (de)
French (fr)
Other versions
EP0478986A1 (en
Inventor
Walter Kleiner
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
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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP0478986A1 publication Critical patent/EP0478986A1/en
Application granted granted Critical
Publication of EP0478986B1 publication Critical patent/EP0478986B1/en
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
    • D03D47/38—Weft pattern mechanisms

Definitions

  • the invention relates to a weft selection and feeding device for weaving machines according to the preamble of claim 1.
  • Known selection devices such as BE 8800691 or CH 1285/87 use push and pull elements which are moved by control cams and to which transmission elements which are coupled to thread feeders are coupled or uncoupled by means of electromagnets.
  • the mechanics required for such devices include a large number of levers, pawls, springs, pivot points and magnets. These devices are therefore susceptible to functional reliability and wear at the high weaving speeds that can be achieved today and can be an unpleasant source of noise; In addition, careful guiding of the weft threads is at risk because of their susceptibility to vibration.
  • the invention has for its object to provide a simple and reliable selection and feeding device that is easy to use and easy to service.
  • the device consists of a housing with a flanged electric motor, preferably a stepper motor or DC motor.
  • a drive wheel is rotatably arranged on the motor shaft.
  • a deflection wheel is attached to the housing below the drive wheel.
  • a belt, preferably a toothed belt, or a roller chain wraps around the two wheels.
  • One thread feeder is attached to each of the two belt strands so that one thread feeder is in the ready position, while the other is in the transfer position. If the thread feeders have to change their end positions, the electronically controlled motor turns the drive wheel in the corresponding direction until the thread feeders move theirs Swapped end positions. The thread feeders remain in their end position until another weft thread has to be woven in according to the pattern.
  • the feed device is only used with one thread feeder, but one device for each weft thread. But it is also possible with more than two different weft threads to electronically control the feed device with two thread feeders each so that three holding and rest positions are created for the thread feeders, so that only four feed devices are required for eight weft threads, for example.
  • one thread feeder is always in the transfer position, the other thread feeder is in the standby position "high”, while the thread feeders of the other feed device remain in the standby position "center”, where the thread eyelets cross, and no weft threads can be taken away by the weft insertion organ.
  • Each thread feeder is in one of the three positions in accordance with the model control program for the electric motors and changes positions during the weaving process.
  • weft threads 17 are drawn from supply bobbins 16 by a weft insertion member and inserted into the shed.
  • the selection and presentation of the weft threads 17 is carried out in accordance with the pattern by electronic control of the electric motor 2, which is fastened to the housing 1 and has a drive wheel 4 connected to it in a form-fitting manner on the motor shaft 3.
  • the deflection wheel 5 is rotatably fastened to the housing 1 and the center distance and the difference in diameter of the drive wheel 4 and the deflection wheel 5 are dimensioned such that the elongated straight belt strand of the looping belt 6 intersects in the transfer position U.
  • the thread feeders 7, 7a are attached by means of fastening elements 8 and, guided by the guide 10, run parallel to the belt runs.
  • the weft threads 17, 17a slide through the thread eyelets 9 of the thread feeders 7, 7a.
  • the thread feeder 7 with the thread eyelet 9 and weft thread 17 is in the transfer position U while thread feeder 7a with the thread eyelet 9 with weft thread 17a is in the standby position B. If the weft 17a has to be brought into the transfer position U according to the pattern, the electric motor 2 is controlled accordingly and the drive wheel 4 drives the belt 6 and moves the thread feeder 7a with the weft thread 17a into the transfer position U, while the thread feeder 7 inevitably into the standby position B. drives back. The crossing of the weft threads 17, 17a takes place halfway with a mutual distance, so that a mutual hanging of the threads is excluded.
  • control program for the electric motors is programmed so that of all the devices used, only the sample thread feeder is in the transfer position U, while all other thread feeders are in the standby position B ', as shown in FIG. 3, or a thread feeder is in the standby position B is.
  • the thread feeders 14, 14a are arranged between two belts 12, 12a in the plane 11 of the belt pull fiber inserts 13 and are clamped to them in a form-fitting manner by means of the fastening elements 8. Due to the common plane of movement of the belt and the thread feeder, there are no bending and tilting moments as a result of acceleration and deceleration forces caused by the thread feeder movements on the belt. An additional guide for the thread feeder is not necessary with this arrangement. One thread feeder per device, or two, can be used.

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

Description

Die Erfindung betrifft eine Schussfadenauswahl- und Zuführvorrichtung für Webmaschinen gemäß dem Oberbegriff des Anspruches 1.The invention relates to a weft selection and feeding device for weaving machines according to the preamble of claim 1.

Bekannte Auswählvorrichtungen wie z.B. BE 8800691 oder CH 1285/87 verwenden durch Steuerkurven bewegte Stoss- und Zugelemente an die mittels Elektromagnete Übertragungsorgane, die an Fadenzubringer gekoppelt sind, an- oder abgekuppelt werden. Die für solche Vorrichtungen notwendige Mechanik beinhaltet neben den Steuerkurven eine Vielzahl von Hebeln, Klinken, Federn, Drehpunkte und Magnete. Diese Vorrichtungen sind dadurch bei den heute erreichbaren hohen Webgeschwindigkeiten anfällig auf Funktionssicherheit und Verschleiß und können unangenehme Lärmquelle sein; zudem ist eine schonende Führung der Schussfäden wegen Vibrationsanfälligkeit gefährdet.Known selection devices such as BE 8800691 or CH 1285/87 use push and pull elements which are moved by control cams and to which transmission elements which are coupled to thread feeders are coupled or uncoupled by means of electromagnets. In addition to the control cams, the mechanics required for such devices include a large number of levers, pawls, springs, pivot points and magnets. These devices are therefore susceptible to functional reliability and wear at the high weaving speeds that can be achieved today and can be an unpleasant source of noise; In addition, careful guiding of the weft threads is at risk because of their susceptibility to vibration.

Der Erfindung liegt die Aufgabe zugrunde, eine einfache und funktionssichere Auswahl- und Zuführvorrichtung zu schaffen, die leicht zu bedienen und servicefreundlich ist.The invention has for its object to provide a simple and reliable selection and feeding device that is easy to use and easy to service.

Die Vorrichtung besteht aus einem Gehäuse mit angeflanschtem Elektromotor, vorzugsweise ein Schrittmotor oder DC-Motor. Auf der Motorwelle ist ein Antriebsrad drehfest angeordnet. Unterhalb des Antriebsrades ist ein Umlenkrad am Gehäuse befestigt. Ein Riemen, vorzugsweise ein Zahnriemen, oder eine Rollenkette umschlingt die beiden Räder. An den beiden Riementrums ist je ein Fadenzubringer formschlüssig so befestigt, daß ein Fadenzubringer in der Bereitschaftsstellung ist, während der andere in der Übergabestellung ruht. Müssen die Fadenzubringer ihre Endstellungen wechseln, dreht der elektronisch angesteuerte Motor das Antriebsrad in der entsprechenden Richtung bis die Fadenzubringer ihre Endstellungen vertauscht haben. Die Fadenzubringer verbleiben in ihrer Endstellung so lange, bis mustergemäß ein anderer Schussfaden eingewoben werden muß.The device consists of a housing with a flanged electric motor, preferably a stepper motor or DC motor. A drive wheel is rotatably arranged on the motor shaft. A deflection wheel is attached to the housing below the drive wheel. A belt, preferably a toothed belt, or a roller chain wraps around the two wheels. One thread feeder is attached to each of the two belt strands so that one thread feeder is in the ready position, while the other is in the transfer position. If the thread feeders have to change their end positions, the electronically controlled motor turns the drive wheel in the corresponding direction until the thread feeders move theirs Swapped end positions. The thread feeders remain in their end position until another weft thread has to be woven in according to the pattern.

Sind mehr als zwei verschiedene Schussfäden für den Webprozeß notwendig, wird die Zuführvorrichtung nur mit einem Fadenzubringer eingesetzt, jedoch für jeden Schussfaden eine Vorrichtung.
Es ist aber auch möglich bei mehr als zwei verschiedenen Schussfäden die Zuführvorrichtung mit je zwei Fadenzubringer elektronisch so anzusteuern, daß drei Halte- und Ruhestellungen für die Fadenzubringer entstehen, dadurch für z.B. acht Schussfäden nur vier Zuführvorrichtungen benötigt werden. Bei dieser Mehrfachanordnung von Zuführvorrichtungen ist bei einer Zuführvorrichtung immer ein Fadenzubringer in der Übergabestellung, der andere Fadenzubringer in der Bereitschaftsstellung "Hoch", während die Fadenzubringer der andern Zuführvorrichtung in der Position Bereitschaftsstellung "Mitte", wo sich die Fadenösen kreuzen, verbleiben und keine Schussfäden vom Schussfadeneintragungsorgan mitgenommen werden können. Jeder Fadenzubringer ist entsprechend dem mustergemäßen Steuerprogramm für die Elektomotoren in einer der drei Stellungen und wechselt die Stellungen im Verlauf des Webprozesses.If more than two different weft threads are necessary for the weaving process, the feed device is only used with one thread feeder, but one device for each weft thread.
But it is also possible with more than two different weft threads to electronically control the feed device with two thread feeders each so that three holding and rest positions are created for the thread feeders, so that only four feed devices are required for eight weft threads, for example. With this multiple arrangement of feed devices, one thread feeder is always in the transfer position, the other thread feeder is in the standby position "high", while the thread feeders of the other feed device remain in the standby position "center", where the thread eyelets cross, and no weft threads can be taken away by the weft insertion organ. Each thread feeder is in one of the three positions in accordance with the model control program for the electric motors and changes positions during the weaving process.

Weitere Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung und aus den in der Zeichnung schematisch dargestellten Ausführungsbeispielen. In der Zeichnung zeigen:

Fig. 1
die Schussfadenauswahl- und Zuführvorrichtung mit einem Fadenzubringer in der Übergabestellung und in der Bereitschaftsstellung;
Fig. 2
die Vorrichtung nach Fig. 1, in schematischer Darstellung;
Fig. 3
beide Fadenzubringer gleichzeitig in einer Bereitschaftsstellung;
Fig. 4
die Vorrichtung mit parallel zueinander beweglichen, durch den Riemen geführte Fadenzuführer;
Fig. 5
einen Querschnitt durch das Befestigungselement und zwei Riemen mit Fadenzubringer in der Riemenzugfaser-Ebene.
Further features of the invention emerge from the following description and from the exemplary embodiments shown schematically in the drawing. The drawing shows:
Fig. 1
the weft selection and feeding device with a thread feeder in the transfer position and in the standby position;
Fig. 2
the apparatus of Figure 1, in a schematic representation.
Fig. 3
both thread feeders in a standby position at the same time;
Fig. 4
the device with parallel to each other, guided by the belt thread feeder;
Fig. 5
a cross section through the fastener and two straps with thread feeder in the belt tension fiber plane.

Während dem Webprozeß werden durch ein Schusseintragorgan 15 Schussfäden 17 von Vorratsspulen 16 abgezogen und in das Webfach eingetragen. Die Auswahl und die Vorlage der Schussfäden 17 erfolgt mustergemäß durch elektronische Ansteuerung des Elektromotors 2, welcher am Gehäuse 1 befestigt ist und auf der Motorwelle 3 ein damit formschlüssig verbundenes Antriebsrad 4 hat. Das Umlenkrad 5 ist drehbar am Gehäuse 1 befestigt und der Achsabstand und die Durchmesserdifferenz von Antriebsrad 4 und Umlenkrad 5 ist so bemessen, daß die verlängert gedachten geraden Riementrums des umschlingenden Riemens 6 sich in der Übergabestellung U schneiden. Am schlupffrei laufenden Riemen 6 sind mittels Befestigungselementen 8 die Fadenzubringer 7,7a angebracht die, geführt durch die Führung 10, parallel zu den Riementrums laufen. Die Schussfäden 17,17a gleiten durch die Fadenösen 9 der Fadenzubringer 7,7a.During the weaving process, weft threads 17 are drawn from supply bobbins 16 by a weft insertion member and inserted into the shed. The selection and presentation of the weft threads 17 is carried out in accordance with the pattern by electronic control of the electric motor 2, which is fastened to the housing 1 and has a drive wheel 4 connected to it in a form-fitting manner on the motor shaft 3. The deflection wheel 5 is rotatably fastened to the housing 1 and the center distance and the difference in diameter of the drive wheel 4 and the deflection wheel 5 are dimensioned such that the elongated straight belt strand of the looping belt 6 intersects in the transfer position U. On the non-slip belt 6, the thread feeders 7, 7a are attached by means of fastening elements 8 and, guided by the guide 10, run parallel to the belt runs. The weft threads 17, 17a slide through the thread eyelets 9 of the thread feeders 7, 7a.

Wie in Fig. 2 dargestellt, ist z.B. der Fadenzubringer 7 mit der Fadenöse 9 und Schussfaden 17 in der Übergabestellung U während Fadenzubringer 7a mit der Fadenöse 9 mit Schussfaden 17a in der Bereitschaftsstellung B sich befindet. Muß mustergemäß der Schußfaden 17a in die Übergabestellung U gebracht werden, wird der Elektromotor 2 entsprechend angesteuert und das Antriebsrad 4 treibt den Riemen 6 an und bewegt den Fadenzubringer 7a mit dem Schussfaden 17a in die Übergabestellung U, während der Fadenzubringer 7 zwangsläufig in die Bereitschaftsstellung B zurück fährt. Das Kreuzen der Schussfäden 17,17a erfolgt auf halbem Weg mit gegenseitigem Abstand, so daß ein gegenseitiges Verhängen der Fäden ausgeschlossen ist.As shown in FIG. 2, for example the thread feeder 7 with the thread eyelet 9 and weft thread 17 is in the transfer position U while thread feeder 7a with the thread eyelet 9 with weft thread 17a is in the standby position B. If the weft 17a has to be brought into the transfer position U according to the pattern, the electric motor 2 is controlled accordingly and the drive wheel 4 drives the belt 6 and moves the thread feeder 7a with the weft thread 17a into the transfer position U, while the thread feeder 7 inevitably into the standby position B. drives back. The crossing of the weft threads 17, 17a takes place halfway with a mutual distance, so that a mutual hanging of the threads is excluded.

Muß aus mehr als zwei verschiedenen Schussfäden ausgewählt werden, sind entsprechend mehr Vorrichtungen einzusetzen. Dabei ist das Ansteuerprogramm für die Elektromotoren so programmiert, daß von allen eingesetzten Vorrichtungen nur der mustergemäße Fadenzubringer in der Übergabestellung U ist, während alle anderen Fadenzubringer in der Bereitschaftsstellung B' sind, wie in Fig. 3 dargestellt, bzw. ein Fadenzubringer in der Bereitschaftstellung B ist.If more than two different weft threads have to be selected, more devices must be used accordingly. The control program for the electric motors is programmed so that of all the devices used, only the sample thread feeder is in the transfer position U, while all other thread feeders are in the standby position B ', as shown in FIG. 3, or a thread feeder is in the standby position B is.

Fig. 4 zeigt eine Vorrichtung mit gleichgroßen Durchmessern von Antriebsrad 4 und Umlenkrad 5 und parallel zueinander laufenden Fadenzubringern 14,14a. Die Fadenzubringer 14,14a sind zwischen zwei Riemen 12,12a in der Ebene 11 der Riemenzugfasereinlagen 13 angeordnet und mittels der Befestigungselemente 8 daran formschlüssig festgeklemmt. Durch die gemeinsame Bewegungsebene von Riemen und Fadenzubringer entstehen keine Biege- und Kippmomente infolge Beschleunigungs- und Verzögerungskräfte, hervorgerufen durch die Fadenzubringerbewegungen, auf die Riemen. Eine zusätzliche Führung für die Fadenzubringer ist bei dieser Anordnung nicht notwendig. Es kann ein Fadenzubringer pro Vorrichtung eingesetzt werden, oder deren zwei.4 shows a device with the same size diameters of drive wheel 4 and deflection wheel 5 and thread feeders 14, 14a running parallel to one another. The thread feeders 14, 14a are arranged between two belts 12, 12a in the plane 11 of the belt pull fiber inserts 13 and are clamped to them in a form-fitting manner by means of the fastening elements 8. Due to the common plane of movement of the belt and the thread feeder, there are no bending and tilting moments as a result of acceleration and deceleration forces caused by the thread feeder movements on the belt. An additional guide for the thread feeder is not necessary with this arrangement. One thread feeder per device, or two, can be used.

Claims (2)

  1. Weft selecting and feed device for looms, for selective moving of thread regulators between a standby position and a delivery position, characterised in that a belt (6) which runs in a casing (1) without slipping wraps around a drive wheel (4) which is driven by an electronically controlled electric motor (2) and a deflection wheel (5), wherein the wheels (4, 5) have a certain difference in diameter and a certain distance between the axes; in that the extended straight lines of application of the belt strands intersect in the delivery position (U) at a point (P), and in that a thread regulator (7, 7a) is mounted on each of the two belt runs in the line of application of the belt run in such a manner that the one thread regulator (7a) is in the standby position (B) whilst the other thread regulator (7) is in the delivery position (U), and these positions (B, U) are positively exchanged by turning the drive wheel (4).
  2. Device according to Claim 1,
    characterised in that the drive wheel (4) and the deflection wheel (5) have the same diameter and are wrapped around by two belts (12, 12a) and the thread regulators (14, 14a) are secured, between the belts (12, 12a) in the plane (11) of the belt tension-fibre core (13), in a form-locking manner to both belts (12, 12a), such that no bending moments can act on the straps (12, 12a) in consequence of acceleration and deceleration forces from the thread regulators (14, 14a), and when the drive wheel (4) is turned, the thread regulators (14, 14a) perform straight and parallel movements with respect to one another without additional guide elements.
EP91115150A 1990-10-05 1991-09-07 Weft selecting and feeding device for looms Expired - Lifetime EP0478986B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3215/90 1990-10-05
CH3215/90A CH682498A5 (en) 1990-10-05 1990-10-05 Schussfadenauswahl- and feeder loom.

Publications (2)

Publication Number Publication Date
EP0478986A1 EP0478986A1 (en) 1992-04-08
EP0478986B1 true EP0478986B1 (en) 1994-10-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91115150A Expired - Lifetime EP0478986B1 (en) 1990-10-05 1991-09-07 Weft selecting and feeding device for looms

Country Status (5)

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US (1) US5172735A (en)
EP (1) EP0478986B1 (en)
JP (1) JP2620439B2 (en)
CH (1) CH682498A5 (en)
DE (1) DE59103223D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006025265A1 (en) * 2006-05-31 2007-12-06 Lindauer Dornier Gmbh Method and apparatus for forming a fabric edge on a rapier loom

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1006347A3 (en) * 1992-11-16 1994-07-26 Picanol Nv DEVICE FOR PRESENTING weft threads in weaving machines.
DE4325905C1 (en) * 1993-08-02 1994-10-06 Dornier Gmbh Lindauer Device for feeding weft threads to a weft-thread insertion member in weaving machines
IT1293828B1 (en) * 1997-08-07 1999-03-10 Vamatex Nuova Spa WEFT PRESENTING MACHINE FOR WEAVING FRAMES
DE50308119D1 (en) * 2003-07-10 2007-10-18 Staeubli Gmbh Weft changing device for a weaving machine
CN102507089B (en) * 2011-11-30 2013-07-24 长春理工大学 Calibration device and method of car door closing force tester

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293558B1 (en) * 1987-04-03 1991-08-07 GebràœDer Sulzer Aktiengesellschaft Weft thread selection device for a loom
DE3812960A1 (en) * 1987-10-06 1989-04-20 Textilma Ag GRIPPER WEAVING MACHINE
BE1002081A3 (en) * 1988-06-17 1990-06-19 Picanol Nv DEVICE FOR PRESENTING weft threads in weaving machines.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006025265A1 (en) * 2006-05-31 2007-12-06 Lindauer Dornier Gmbh Method and apparatus for forming a fabric edge on a rapier loom

Also Published As

Publication number Publication date
EP0478986A1 (en) 1992-04-08
US5172735A (en) 1992-12-22
JPH05132838A (en) 1993-05-28
JP2620439B2 (en) 1997-06-11
CH682498A5 (en) 1993-09-30
DE59103223D1 (en) 1994-11-17

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