EP0629726A1 - Process to avoid a weaving fault and loom for carrying out this process - Google Patents

Process to avoid a weaving fault and loom for carrying out this process Download PDF

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Publication number
EP0629726A1
EP0629726A1 EP93810428A EP93810428A EP0629726A1 EP 0629726 A1 EP0629726 A1 EP 0629726A1 EP 93810428 A EP93810428 A EP 93810428A EP 93810428 A EP93810428 A EP 93810428A EP 0629726 A1 EP0629726 A1 EP 0629726A1
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EP
European Patent Office
Prior art keywords
weaving
weaving machine
fabric
warp
weft thread
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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.)
Withdrawn
Application number
EP93810428A
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German (de)
French (fr)
Inventor
Klaus Berktold
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.)
Itema Switzerland Ltd
Maschinenfabrik Rueti AG
Original Assignee
Sultex AG
Maschinenfabrik Rueti AG
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 Sultex AG, Maschinenfabrik Rueti AG filed Critical Sultex AG
Priority to EP93810428A priority Critical patent/EP0629726A1/en
Publication of EP0629726A1 publication Critical patent/EP0629726A1/en
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/002—Avoiding starting marks

Definitions

  • the invention relates to a method for avoiding a weaving error according to the preamble of claim 1 and a weaving machine for carrying out the method.
  • Mainly weaving errors in fabric formation are caused by weft errors and / or warp thread breaks because the weaving machine has to be brought to a standstill as a result.
  • other disorders can have the same effect.
  • the braking phase of the weaving machine extends over a substantial part or even more than one weaving cycle.
  • the invention seeks to remedy this.
  • the invention as characterized in claim 1, solves the problem of creating a method for avoiding weaving errors, by means of which the prerequisites are created for weaving machines with a high weft insertion rate to avoid the formation of contact points in the fabric.
  • a loom according to the invention for carrying out the method is characterized by the features of claim 6.
  • the warp beam 1 contains a warp beam 1, a tensioning beam 2, a shedding device 3 and a sley 4, as well as a breast beam 5, a goods take-off roller 6, a pressure roller 7 and a goods beam 8.
  • the warp beam 1 is with a warp let-off device 10 according to the Arrows 11 and 11a coupled to be drivable.
  • the goods take-off roller 6 is coupled to a goods take-off device 12 according to the arrows 13 and 13a.
  • warp threads 14 are against the fabric edge 15 by the shedding device 3 and guided by it as part of a fabric 16 formed there against the fabric tree 8 onto which the fabric 16 is wound.
  • the shedding device 3 contains a number of heald frames 17, only two of which are shown in the drawing, and a drive device 18, by means of which the heald frames 17 can each be adjusted to form a shed 20.
  • a weft insertion device coupled to the main drive of the loom by a weft insertion means, e.g. Compressed air or, as indicated in the drawing, e.g. band-shaped gripper element 21, a weft thread 22 is inserted, which in a stop position 4 'of the sley 4, which can be pivoted via a drive device 23, is attached to the fabric edge 15 and is integrated by a subsequent change of subject.
  • a weft insertion means e.g. Compressed air or, as indicated in the drawing, e.g. band-shaped gripper element 21, a weft thread 22 is inserted, which in a stop position 4 'of the sley 4, which can be pivoted via a drive device 23, is attached to the fabric edge 15 and is integrated by a subsequent change of subject.
  • the drives of the warp let-off device 10 and the goods take-off device 12 and the drive device 18 of the shedding device 3 can each be controlled by a common control device 24 in accordance with a weaving program.
  • the drive device 23 of the sley 4 can be coupled to the main drive of the weaving machine or, as shown, can also be controlled by itself via the control device 24.
  • the control device 24 is in a known manner via signal lines 27, 28, 30; 31, 32 can be influenced by control signals from numerous monitoring devices, by means of which, for example, the tension of the warp threads 14 and the weft threads 22 and the state of the fabric 16 formed are detected.
  • a sensor 25 for monitoring the position of the goods edge 15 and a number of guard elements 26 for detecting an error, for example an incorrectly entered weft thread 22, are indicated in the fabric 16 formed.
  • the guard elements 26 are parallel and in the same or different distances across the weaving width of the loom.
  • the sensor 25 and the monitor elements 26 are connected to the control device 24 via the signal lines 27 and 28, respectively.
  • Warp thread breaks are determined by a warp thread monitor device, not shown here, for example in a known manner.
  • the drives of the individual units of the weaving machine are coordinated with one another via the control device 24 and controlled in accordance with the predetermined weaving program during normal weaving operation.
  • the relevant monitoring element emits an interference signal to the control device 24.
  • the control device emits a switch-off signal for stopping the weaving machine and, at the same time, a control signal for shifting the fabric edge 15 into an avoidance position 15 '.
  • This control signal has the effect that the drive for the warp let-off device 10 and / or the goods take-off device 12 is briefly rotated faster. As a result, the fabric edge 15 is moved away from the stop position 4 'towards the evasive position 15', so that the incorrectly inserted weft thread is at least not hit with full force on the fabric edge by the reed 4.
  • Contact points that may appear after the weaving machine has been restarted can e.g. by a method as disclosed in European Patent Application No. 93810211.8 (T.890).
  • control device 24 in addition to the switch-off signal for stopping the weaving machine, the control device 24 also outputs a control signal for shortening the length of the loading stroke of the weaving sley.
  • the shutter drive device 23 is provided with a shutter control device as described, for example, in EP-A-350 446.

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

Abstract

To prevent weaving faults, according to the process, on the one hand the weaving machine is stopped as a function of a disturbance signal and on the other hand the fabric edge (15) is simultaneously shifted into a set-aside position (15'), so that the reed does not butt against the incorrectly inserted weft thread. Run-on points in the fabric are prevented by means of a starting process coordinated with the type of fabric, of the warp thread and of the weft thread. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Vermeidung eines Webfehlers gemäss dem Oberbegriff des Anspruches 1 sowie eine Webmaschine zur Durchführung des Verfahrens.The invention relates to a method for avoiding a weaving error according to the preamble of claim 1 and a weaving machine for carrying out the method.

In der Hauptsache werden Webfehler bei der Gewebebildung durch Schussfehler und/oder Kettfadenbrüche bewirkt, weil dadurch die Webmaschine zum Stillstand gebracht werden muss. Neben diesen können andere Störungen die gleiche Wirkung haben.Mainly weaving errors in fabric formation are caused by weft errors and / or warp thread breaks because the weaving machine has to be brought to a standstill as a result. In addition to these, other disorders can have the same effect.

Beim Stillsetzen der bekannten Webmaschine kann je nach Auslösepunkt eines Störsignals ein Anschlagen des eingetragenen Schussfadens nicht verhindert werden. Insbesondere bei Hochleistungswebmaschinen erstreckt sich die Bremsphase der Webmaschine über einen wesentlichen Teil oder sogar mehr als einen Webzyklus.When the known weaving machine is stopped, depending on the trigger point of an interfering signal, the inserted weft thread cannot be prevented from striking. In the case of high-performance weaving machines in particular, the braking phase of the weaving machine extends over a substantial part or even more than one weaving cycle.

Hier will die Erfindung Abhilfe schaffen. Die Erfindung wie sie im Anspruch 1 gekennzeichnet ist, löst die Aufgabe ein Verfahren zur Vermeidung von Webfehlern zu schaffen, durch welches bei Webmaschinen mit hoher Schusseintragleistung die Voraussetzung dafür geschaffen wird, die Bildung von Anlaufstellen im Gewebe zu vermeiden.The invention seeks to remedy this. The invention, as characterized in claim 1, solves the problem of creating a method for avoiding weaving errors, by means of which the prerequisites are created for weaving machines with a high weft insertion rate to avoid the formation of contact points in the fabric.

Die mit der Erfindung erzielbare Vorteile sind im wesentlichen darin zu sehen, dass ein Anschlagen eines fehlerhaft eingetragenen Schussfadens über jenen Abschnitt der Webbreite verhindert wird, innerhalb welchem Schussfehler erfahrungsgemäss auftreten und dass ein Anschlagen eines Abschnittes eines fehlerhaft eingetragenen Schussfaden verhindert wird, um eine Deformierung der Kettfäden und/oder eines vorgängig dem Schussfehler eingetragenen Schussfadens zu vermeiden.The advantages achievable with the invention are essentially to be seen in that an incorrectly inserted weft thread is prevented from striking over that section of the weaving width within which, according to experience, weft errors occur and that a section of an incorrectly entered weft thread is prevented in order to prevent deformation of the Avoid warp threads and / or a weft thread previously entered for the weft error.

Vorteilhafte Ausführungsformen der Erfindung ergeben sich aus den abhängigen Patentansprüchen.Advantageous embodiments of the invention result from the dependent patent claims.

Eine erfindungsgemässe Webmaschine zur Durchführung des Verfahrens ist durch die Merkmale des Anspruches 6 gekennzeichnet.A loom according to the invention for carrying out the method is characterized by the features of claim 6.

Nachfolgend wird die Erfindung anhand der beiliegenden Zeichnungen erläutert. Es zeigen:

Fig. 1
eine Seitenansicht einer zur Durchführung des erfindungsgemässen Verfahrens geeignete Webmaschine in vereinfachter Darstellung und
Fig. 2
eine schematische dargestellte Ansicht des Webfaches der in Fig. 1 gezeigten Webmaschine.
The invention is explained below with reference to the accompanying drawings. Show it:
Fig. 1
a side view of a weaving machine suitable for carrying out the method according to the invention in a simplified representation and
Fig. 2
is a schematic view of the shed of the weaving machine shown in Fig. 1.

Die Webmaschine nach Fig. 1 enthält einen Kettbaum 1, einen Spannbaum 2, eine Fachbildevorrichtung 3 und eine Weblade 4, sowie einen Brustbaum 5, eine Warenabzugswalze 6, eine Andrückrolle 7 und einen Warenbaum 8. Der Kettbaum 1 ist mit einer Kettablassvorrichtung 10 entsprechend den Pfeilen 11 und 11a antreibbar gekoppelt. In entsprechender Weise ist die Warenabzugswalze 6 mit einer Warenabzugsvorrichtung 12 entsprechend den Pfeilen 13 bzw. 13a antreibbar gekoppelt. Vom Kettbaum 1 sind Kettfäden 14 durch die Fachbildevorrichtung 3 gegen einen Warenrand 15 und von diesem als Teil eines dort gebildeten Gewebes 16 gegen den Warenbaum 8 geführt, auf den das Gewebe 16 aufgewickelt wird. Die Fachbildevorrichtung 3 enthält eine Anzahl Webschäfte 17, von denen in der Zeichnung nur zwei dargestellt sind, und eine Antriebsvorrichtung 18, über welche die Webschäfte 17 jeweils zur Bildung eines Webfachs 20 verstellbar sind.1 contains a warp beam 1, a tensioning beam 2, a shedding device 3 and a sley 4, as well as a breast beam 5, a goods take-off roller 6, a pressure roller 7 and a goods beam 8. The warp beam 1 is with a warp let-off device 10 according to the Arrows 11 and 11a coupled to be drivable. In a corresponding manner, the goods take-off roller 6 is coupled to a goods take-off device 12 according to the arrows 13 and 13a. From the warp beam 1, warp threads 14 are against the fabric edge 15 by the shedding device 3 and guided by it as part of a fabric 16 formed there against the fabric tree 8 onto which the fabric 16 is wound. The shedding device 3 contains a number of heald frames 17, only two of which are shown in the drawing, and a drive device 18, by means of which the heald frames 17 can each be adjusted to form a shed 20.

In das Webfach 20 wird jeweils über eine mit dem Hauptantrieb der Webmaschine gekoppelte, nicht dargestellte Schusseintragsvorrichtung durch ein Schusseintragsmittel, z.B. Druckluft oder, wie in der Zeichnung angedeutet, ein z.B. bandförmiges Greiferelement 21, ein Schussfaden 22 eingetragen, der in einer Anschlagposition 4' der über eine Antriebseinrichtung 23 verschwenkbaren Weblade 4 an den Warenrand 15 angeschlagen und durch einen folgenden Fachwechsel eingebunden wird.In the shed 20 is in each case via a weft insertion device, not shown, coupled to the main drive of the loom by a weft insertion means, e.g. Compressed air or, as indicated in the drawing, e.g. band-shaped gripper element 21, a weft thread 22 is inserted, which in a stop position 4 'of the sley 4, which can be pivoted via a drive device 23, is attached to the fabric edge 15 and is integrated by a subsequent change of subject.

Die Antriebe der Kettablassvorrichtung 10 und der Warenabzugsvorrichtung 12 sowie die Antriebsvorrichtung 18 der Fachbildevorrichtung 3 sind je für sich über eine gemeinsame Steuervorrichtung 24 entsprechend einem Webprogramm ansteuerbar. Die Antriebsvorrichtung 23 der Weblade 4 kann mit dem Hauptantrieb der Webmaschine gekoppelt oder, wie dargestellt, ebenfalls für sich über die Steuervorrichtung 24 ansteuerbar sein. Die Steuervorrichtung 24 ist in bekannter Weise über in der Zeichnung angedeutete Signalleitungen 27, 28, 30; 31, 32 durch Steuersignale zahlreicher Ueberwachungseinrichtungen beeinflussbar, durch welche z.B. die Spannung der Kettfäden 14 und der Schussfäden 22 sowie der Zustand des gebildeten Gewebes 16 erfasst wird. In der Zeichnung sind ein Sensor 25 zur Ueberwachung der Position des Warenrandes 15 und eine Anzahl von Wächterelementen 26 zur Erfassung eines Fehlers, z.B. eines fehlerhaft eingetragenen Schussfadens 22, im gebildeten Gewebe 16 angedeutet. Die Wächterelemente 26 sind parallel und in gleichen oder unterschiedlichen Abständen über die Webbreite der Webmaschine angeordnet. Der Sensor 25 und die Wächterelemente 26 sind über die Signalleitungen 27 bzw. 28 mit der Steuervorrichtung 24 verbunden. Die Feststellung von Kettfadenbrüchen erfolgt durch eine z.B. in bekannter Weise, hier nicht gezeigte Kettfadenwächtereinrichtung. Ueber die Steuervorrichtung 24 werden die Antriebe der einzelnen Aggregate der Webmaschine aufeinander abgestimmt und während des normalen Webbetriebes entsprechend dem vorbestimmten Webprogramm gesteuert.The drives of the warp let-off device 10 and the goods take-off device 12 and the drive device 18 of the shedding device 3 can each be controlled by a common control device 24 in accordance with a weaving program. The drive device 23 of the sley 4 can be coupled to the main drive of the weaving machine or, as shown, can also be controlled by itself via the control device 24. The control device 24 is in a known manner via signal lines 27, 28, 30; 31, 32 can be influenced by control signals from numerous monitoring devices, by means of which, for example, the tension of the warp threads 14 and the weft threads 22 and the state of the fabric 16 formed are detected. In the drawing, a sensor 25 for monitoring the position of the goods edge 15 and a number of guard elements 26 for detecting an error, for example an incorrectly entered weft thread 22, are indicated in the fabric 16 formed. The guard elements 26 are parallel and in the same or different distances across the weaving width of the loom. The sensor 25 and the monitor elements 26 are connected to the control device 24 via the signal lines 27 and 28, respectively. Warp thread breaks are determined by a warp thread monitor device, not shown here, for example in a known manner. The drives of the individual units of the weaving machine are coordinated with one another via the control device 24 and controlled in accordance with the predetermined weaving program during normal weaving operation.

Beim Auftreten einer Betriebsstörung z.B. eines Schuss- oder Kettfadenbruches wird von dem betreffenden Ueberwachungselement ein Störsignal an die Steuereinrichtung 24 abgegeben. In Abhängigkeit dieses Störsignals gibt die Steuereinrichtung ein Abschaltsignal zum Stillsetzen der Webmaschine und gleichzeitig ein Steuersignal zur Verlagerung des Warenrandes 15 in eine Ausweichstellung 15' ab. Dieses Steuersignal bewirkt, dass der Antrieb für die Kettablassvorrichtung 10 und/oder die Warenabzugvorrichtung 12 kurzzeitig schneller gedreht wird. Dadurch wird der Warenrand 15 von der Anschlagposition 4' weg zur Ausweichstellung 15' hin bewegt, so dass der fehlerhaft eingetragende Schussfaden durch das Webblatt 4 zumindest nicht mit voller Kraft an den Warenrand angeschlagen wird. Anlaufstellen, welche evtl. nach dem Wiederstart der Webmaschine auftreten, können z.B. durch ein Verfahren, wie es in der europäischen Patentanmeldung Nr. 93810211.8 (T.890) offenbart ist, ausgeglichen werden.If a malfunction occurs e.g. of a weft or warp thread break, the relevant monitoring element emits an interference signal to the control device 24. Depending on this interference signal, the control device emits a switch-off signal for stopping the weaving machine and, at the same time, a control signal for shifting the fabric edge 15 into an avoidance position 15 '. This control signal has the effect that the drive for the warp let-off device 10 and / or the goods take-off device 12 is briefly rotated faster. As a result, the fabric edge 15 is moved away from the stop position 4 'towards the evasive position 15', so that the incorrectly inserted weft thread is at least not hit with full force on the fabric edge by the reed 4. Contact points that may appear after the weaving machine has been restarted can e.g. by a method as disclosed in European Patent Application No. 93810211.8 (T.890).

Bei einer anderen Ausführungsform des erfindungsgemässen Verfahrens gibt die Steuereinrichtung 24 neben dem Abschaltsignal zum Stillstandsetzen der Webmaschine gleichzeitig ein Steuersignal zur Verkürzung der Länge des Ladhubes der Weblade ab. Hierzu wird die Webladenantriebsvorrichtung 23 mit einer Webladensteuervorrichtung versehen, wie sie z.B. in der EP-A-350 446 beschrieben ist.In another embodiment of the method according to the invention, in addition to the switch-off signal for stopping the weaving machine, the control device 24 also outputs a control signal for shortening the length of the loading stroke of the weaving sley. For this, the The shutter drive device 23 is provided with a shutter control device as described, for example, in EP-A-350 446.

Die Anwendung der vorstehend beschriebenen Verfahren hängt von verschiedenen Faktoren ab, insbesondere von der Art des Gewebes, des Kettfadens und des Schussfadens.The application of the methods described above depends on various factors, in particular the type of fabric, the warp thread and the weft thread.

Claims (6)

Verfahren zur Vermeidung eines Webfehlers bei der Gewebebildung in einer Webmaschine, welche eine Kettablassvorrichtung (10), eine Warenabzugvorrichtung (12), eine Fachbildevorrichtung (3), eine Weblade (4) und eine Steuereinrichtung (24) enthält, die beim Auftreten eines Störsignals den Antrieb der Webmaschine abschaltet, dadurch gekennzeichnet, dass gleichzeitig mit der Abschaltung die Webmaschine im Sinne einer Vermeidung des Anschlages des Schussfadens an den Warenrand (15) angesteuert wird.Method for avoiding a weaving error in the formation of fabric in a weaving machine, which contains a warp let-off device (10), a goods take-off device (12), a shedding device (3), a weaving drawer (4) and a control device (24) which detects the occurrence of an interference signal Switching off the drive of the weaving machine, characterized in that, simultaneously with the shutdown, the weaving machine is activated in order to prevent the weft thread from striking the goods edge (15). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Warenrand (15) in eine von der Anschlagposition (4') der Weblade (4) entfernte Ausweichstellung (15') geführt wird.A method according to claim 1, characterized in that the goods edge (15) is guided into an alternative position (15 ') remote from the stop position (4') of the sley (4). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Länge des Ladhubes der Weblade (4) verringert wird.A method according to claim 1, characterized in that the length of the loading stroke of the sley (4) is reduced. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Antrieb für die Kettablassvorrichtung und/oder die Warenabzugvorrichtung kurzzeitig schneller gedreht wird.Method according to one of claims 1 or 2, characterized in that the drive for the warp let-off device and / or the goods take-off device is briefly rotated faster. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Eintragsvorgang des Schussfadens in vorbestimmten Abständen überwacht wird.Method according to one of claims 1 to 4, characterized in that the insertion process of the weft thread is monitored at predetermined intervals. Webmaschine zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine Anzahl von Wächterelementen (26) vorgesehen sind, die parallel und in gleichen oder unterschiedlichen Abständen über die Webbreite der Webmaschine angeordnet sind, um einen fehlerhaften Schussfadeneintrag festzustellen.Weaving machine for carrying out the method according to one of claims 1 to 5, characterized in that a number of guard elements (26) are provided which are parallel and in the same or different Distances across the weaving width of the loom are arranged in order to determine an incorrect weft insertion.
EP93810428A 1993-06-15 1993-06-15 Process to avoid a weaving fault and loom for carrying out this process Withdrawn EP0629726A1 (en)

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EP93810428A EP0629726A1 (en) 1993-06-15 1993-06-15 Process to avoid a weaving fault and loom for carrying out this process

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950740A1 (en) * 1998-03-21 1999-10-20 Günne Webmaschinenfabrik GmbH &amp; Co. KG Process to avoid weaving faults and loom for carrying out this process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2310570A1 (en) * 1975-05-05 1976-12-03 Rydborn S A O DEVICE TO INDICATE IF ONE OR MORE OBJECTS ARE MOVING
EP0350446A1 (en) * 1988-07-08 1990-01-10 GebràœDer Sulzer Aktiengesellschaft Terry fabric making process and loom with pile-forming devices
JPH02169749A (en) * 1988-12-16 1990-06-29 Tsudakoma Corp Operation of loom
JPH0376848A (en) * 1989-08-16 1991-04-02 Nissan Motor Co Ltd Device for preventing weaving bar of weaving machine
EP0504110A1 (en) * 1991-03-06 1992-09-16 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for preventing weaving bar in a loom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2310570A1 (en) * 1975-05-05 1976-12-03 Rydborn S A O DEVICE TO INDICATE IF ONE OR MORE OBJECTS ARE MOVING
EP0350446A1 (en) * 1988-07-08 1990-01-10 GebràœDer Sulzer Aktiengesellschaft Terry fabric making process and loom with pile-forming devices
JPH02169749A (en) * 1988-12-16 1990-06-29 Tsudakoma Corp Operation of loom
JPH0376848A (en) * 1989-08-16 1991-04-02 Nissan Motor Co Ltd Device for preventing weaving bar of weaving machine
EP0504110A1 (en) * 1991-03-06 1992-09-16 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for preventing weaving bar in a loom

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 435 (C - 0760) 18 September 1990 (1990-09-18) *
PATENT ABSTRACTS OF JAPAN vol. 15, no. 243 (C - 0843) 16 August 1989 (1989-08-16) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950740A1 (en) * 1998-03-21 1999-10-20 Günne Webmaschinenfabrik GmbH &amp; Co. KG Process to avoid weaving faults and loom for carrying out this process

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