EP0567428A1 - Process for starting a loom and loom for effecting the same - Google Patents

Process for starting a loom and loom for effecting the same Download PDF

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Publication number
EP0567428A1
EP0567428A1 EP93810211A EP93810211A EP0567428A1 EP 0567428 A1 EP0567428 A1 EP 0567428A1 EP 93810211 A EP93810211 A EP 93810211A EP 93810211 A EP93810211 A EP 93810211A EP 0567428 A1 EP0567428 A1 EP 0567428A1
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EP
European Patent Office
Prior art keywords
weaving
fabric
shed
warp
weft
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
EP93810211A
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German (de)
French (fr)
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EP0567428B1 (en
Inventor
Klaus Berktold
Kurt Günther
Anton Egloff
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
Original Assignee
Sulzer AG
Sultex AG
Gebrueder Sulzer AG
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Application filed by Sulzer AG, Sultex AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Priority to EP93810211A priority Critical patent/EP0567428B1/en
Publication of EP0567428A1 publication Critical patent/EP0567428A1/en
Application granted granted Critical
Publication of EP0567428B1 publication Critical patent/EP0567428B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/005—Independent drive motors

Definitions

  • the invention relates to a method for starting a weaving machine after a standstill phase, in particular after an interruption of the weaving process in order to remedy an error in the formation of the fabric, which weaving machine has a warp let-off device, a goods take-off device, a shedding device and a weaving drawer for attaching a weft thread which is respectively inserted into a shed contains the fabric edge of the fabric, in a first starting phase the fabric edge being held in an alternative position distant from a stop position of the sley, a weft feed is blocked in the shed and the weaving machine is driven idle and the edge of the fabric is then returned against the stop position of the sley, and in a second starting phase the weft thread is entered into the shed.
  • the invention further relates to a weaving machine for carrying out the method.
  • the goods edge is held in a forward avoidance position at a distance from the stop position of the sley until a certain lifting force is reached (JP Patent Publication 2-169749) Rule reached in the second weaving cycle, so that in the known embodiment the weft insertion can take place after the first weaving cycle which is carried out in idle mode.
  • a certain lifting force is reached
  • the measures known hitherto in particular in the case of looms with a high speed and correspondingly high weft insertion rate, cannot reliably prevent the formation of such an increase.
  • the invention has for its object to provide a method, particularly improved in this respect, for starting a weaving machine, in particular for restarting after a malfunction has been remedied, by which the formation of contact points in the fabric is reliably avoided even in weaving machines with a high weft insertion rate.
  • the control of the shedding device and at least one of the warp let-off and fabric take-off devices according to the invention permits a targeted influencing of the parameters which are decisive for a uniform fabric image, in particular a restoration of the tension of the warp threads existing before the weaving process is interrupted, until the weaving machine returns to its original, the normal weaving operation has reached the corresponding speed and its corresponding dynamic operating state resulting from the interaction of the individual units.
  • the shedding device and the aggregates interacting therewith can be operated at any time, i.e. after each of the idle weaving cycles, switchable to the operational weaving program to initiate the second starting phase of the method according to the invention.
  • the weaving machine according to the invention for carrying out the method is the subject of claim 5.
  • 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 take-off roller 6, a pressure roller 7 and a load beam 8.
  • the warp beam 1 is equipped with a warp let-off device 10 according to the Arrows 11 and Ila coupled to be driven.
  • the goods take-off roller 6 is coupled to be driven by a goods take-off device 12 in accordance with the arrows 13 and 13a.
  • Warp threads 14 are guided from the warp beam 1 through the shedding device 3 against a fabric edge 15 and from there 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 goods edge 15 and 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 goods edge 15 and integrated by a subsequent change of subject.
  • the drives of the warp let-off device 10 and the goods take-off device 12 as well as 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 e.g. the tension of the warp threads 14 and the weft threads 22 as well as the condition of the fabric 16 formed is detected.
  • a sensor 25 for monitoring the position of the goods edge 15 and a device 26 for detecting an error e.g.
  • the sensor 25 and the device 26 are connected to the control device 24 via the signal lines 27 and 28, respectively.
  • the drives of the individual units of the weaving machine are coordinated with one another via the control device 24 and are controlled in accordance with the predetermined weaving program during normal weaving operation.
  • the weaving machine is stopped by a corresponding control signal of the monitoring element in question and, if necessary, for example to remove an incorrectly inserted weft thread, by resetting the corresponding units - the warp let-off device 10, the goods take-off device 12 and the shedding device 3 - Returned to an operating position intended for the program continuation of the interrupted weaving process.
  • the goods edge 15 is moved from the position shown in full lines to one of the stop position 4 ′ of the sley 4 by stepwise driving the warp beam 1 and the goods take-off roller 6 according to the arrows 11 and 13 respectively removed, dash-dotted alternative position 15 'adjusted and held in this during part of a first starting phase.
  • the one with at least one unit of the weaving machine e.g.
  • the weaving machine when the weft feed to the weft insertion means 21 is blocked - is used for a number, e.g. two to twenty or more, idle weaving cycles until it has reached its original speed corresponding to normal weaving operation, the original tension of the warp threads 14 is restored and all of their aggregates work together in the appropriate, original rhythm.
  • the shedding device 3 is controlled via the control device 24 independently of the weaving program provided in the operational manner in such a way that the heald frames 17 assume a position in each of the idle weaving cycles that corresponds to an open position of the shed 20 in which the last correctly inserted weft thread 22 is securely bound by the warp threads 14 on the fabric edge 15 in the avoidance position 15 '.
  • the heald frames 17, as shown in FIG. 2 can be kept in the same open shed position over all weaving cycles of the first starting phase or, as shown in FIGS. 3 and 4, according to their own, from the operational weaving program different start program can be controlled.
  • At least one of the monitoring devices of the weaving machine e.g. the device 26 assigned to the fabric 16 or a guard element, not shown, which detects the tension of the warp threads 14, initiates a reverse rotation of the warp beam 1 and / or the goods take-off roller 6 in the direction of the arrows Ila or 13a via the control device 24 and the goods edge 15 against the Stop position 4 'of the sley 4 returned.
  • the monitoring devices of the weaving machine e.g. the device 26 assigned to the fabric 16 or a guard element, not shown, which detects the tension of the warp threads 14 initiates a reverse rotation of the warp beam 1 and / or the goods take-off roller 6 in the direction of the arrows Ila or 13a via the control device 24 and the goods edge 15 against the Stop position 4 'of the sley 4 returned.
  • the shedding device 3, the warp let-off device 10 and the take-off device 12 are again activated in accordance with the operationally predetermined weaving program in the sense of a continuation of the interrupted weaving process, the weft thread 22 being transferred to the weft insertion means 21 into the weaving shed 20 formed according to the weaving program , is struck on the goods edge 15 and is integrated by a program-specific following change of subject. Since this weft insertion takes place with the same warp thread tension and under the same dynamic operating conditions as that before the interruption of the Weft insertion carried out during the weaving process, the formation of a visible contact point in the fabric can be avoided in most cases.
  • the goods edge 15 moved back from the avoidance position 15 'at the end of the first starting phase I can be guided into a compensating position 15a or 15b indicated in FIG are held in this position, which is offset by an adjustable dimension - an undersize in position 15a or a corresponding excess in position 15b - relative to a desired position corresponding to the stop position 4 'of the sley 4.
  • This degree of dislocation corresponds to a defined fraction, e.g. 20 to 60% of the warp and fabric feed determined by the weaving program after each weft insertion and is in each case, e.g. can be influenced in accordance with the properties of the warp and / or weft material to be processed, via the warp let-off device 10 and / or the goods take-off device 12 or by appropriate activation of the tensioning arm 2 and / or the breast arm 5.
  • the goods edge 15 is removed from the compensating position 15a or 15b in a predetermined number, e.g. one to ten or more, the same sub-steps each before one of the following weft entries into an appropriate intermediate position and finally into the target position.
  • the operationally constant weft density of the fabric 16, which is determined by the set warp and fabric feed, can be varied within the predetermined limits and thus prevent the occurrence of a fabric defect which occurs in particular within a selectable fabric section limited by the number of partial steps , if, at constant weft density, the wrap angle of the warp threads wrapping around the weft threads deviate from a target value which is established in normal weaving operation.
  • different wrap angles of the warp threads wrapping around the weft threads can thus be compensated and gradually adjusted to the operational target value of this wrap angle.
  • the formation of a visible contact point in the tissue 16 can also be prevented and an essentially uniform tissue image can be achieved.
  • the direction and the degree of the required displacement of the compensation position 15a or 15b relative to the stop position 4 'of the sley 4 can e.g. when weaving the weaving machine covered with the corresponding warp and weft material, determined by starting operations of the weaving machine carried out on a trial basis and adjusted according to the result that can be achieved in the process.
  • the described correction of the position of the goods at the edge of the goods can be carried out automatically in each case by actuating the tensioning tree 2 and / or the breast tree 5.
  • a separate control unit 24a can be provided in the control device 24, which can be activated during the first starting phase and can be switched off before the start of the second starting phase.
  • a corresponding control unit 24a can also be designed as an installation part, which can optionally be installed in an existing control device, for example for retrofitting an existing weaving machine.
  • another shedding device e.g. a jacquard device may be provided.
  • the shed diagram according to FIG. 2 shows a shed 20a with a weft 22a entered in a weaving cycle Wa before the interruption of the weaving process, a shed 20b formed in accordance with the predetermined weaving program for the next weft insertion with a weft 22b entered in a weaving cycle Wb, and a subsequent one according to the program Shed 20c with a weft 22c entered in a weaving cycle Wc.
  • the shed 20b is held in the open position over a plurality of, as shown, five weaving cycles W1 to W5 of the first starting phase 1, as well as in the weaving cycle Wb of the second starting phase, in which the weft thread 22b is entered according to the program.
  • the first start phase can extend over a number, as shown four idle weaving cycles W1 to W4, the weaving shed 20b described above being formed in weaving cycles W1, W3 and Wb, while in weaving cycles W2 and W4 a different shed 20x is formed, which does not appear in the operational weaving program, so that the weft thread 22a is securely bound.
  • the shed 20b can be held in the corresponding open position over several, as shown three, idle weaving cycles W1, W2 and W3 and combined with the shed 20x formed in the idle weaving cycle W4.

Abstract

In a first starting phase, the fabric edge (15) is held at a distance from the beating-up position (4') of the slay (4), the feed of weft thread into the shed (20) is blocked and the loom is started, the shedding device (3) and the warp let-off device (10) and/or the fabric draw-off device (12) being activated via the control device (24) of the loom over a plurality of weaving cycles executed in the idling mode, independently of the weaving programme provided for the operating mode, in such a way that, in each of these weaving cycles, the weft thread (22) located at the fabric edge (15) is kept tied in and the fabric edge (15) is guided back towards the beating-up position (4') in a controlled manner, as soon as the loom has reached its dynamic operating state corresponding to the normal weaving mode. In a second starting phase, the shedding device (3) and the units cooperating with it are activated according to the weaving programme, whereupon the weft thread (22) is inserted into the shed (20) and the interrupted weaving operation is continued. The process according to the invention prevents the formation of run-on points in the fabric. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Starten einer Webmaschine nach einer Stillstandsphase, insbesondere nach einer Unterbrechung des Webvorgangs zwecks Behebung eines Fehlers bei der Gewebebildung, welche Webmaschine eine Kettablassvorrichtung, eine Warenabzugsvorrichtung, eine Fachbildevorrichtung und eine Weblade zum Anschlagen eines jeweils in ein Webfach eingetragenen Schussfadens an den Warenrand des Gewebes enthält, wobei in einer ersten Startphase der Warenrand in einer von eineranschlagposition der Weblade entfernten Ausweichstellung gehalten, eine Schussfadenzufuhr in das Webfach blockiert und die Webmaschine im Leerlauf angetrieben sowie der Warenrand anschliessend gegen die Anschlagposition der Weblade zurückgeführt wird, und wobei in einer zweiten Startphase der Schussfaden in das Webfach eingetragen wird.The invention relates to a method for starting a weaving machine after a standstill phase, in particular after an interruption of the weaving process in order to remedy an error in the formation of the fabric, which weaving machine has a warp let-off device, a goods take-off device, a shedding device and a weaving drawer for attaching a weft thread which is respectively inserted into a shed contains the fabric edge of the fabric, in a first starting phase the fabric edge being held in an alternative position distant from a stop position of the sley, a weft feed is blocked in the shed and the weaving machine is driven idle and the edge of the fabric is then returned against the stop position of the sley, and in a second starting phase the weft thread is entered into the shed.

Ferner betrifft die Erfindung eine Webmaschine zur Durchführung des Verfahrens.The invention further relates to a weaving machine for carrying out the method.

Nach einem bekannten Verfahren der eingangs genannten Art wird jeweils der Warenrand im Abstand von der Anschlagposition der Weblade in einer vorderen Ausweichstellung gehalten, bis eine bestimmte Anschlagkraft erreicht ist (JP-Patent Publication 2-169749) .Die betriebsmässig vorgesehene, volle Anschlagkraft wird in der Regel beim zweiten Webzyklus erreicht, so dass bei der bekannten Ausführung bereits nach dem ersten im Leerlauf ausgeführten Webzyklus der Schusseintrag erfolgen kann. Bei der Herstellung empfindlicher Gewebe, z.B. leichter Gewebe für die Damen-Oberbekleidung, können beim Wiederstarten der Webmaschine zur Fortsetzung des unterbrochenen Webvorgangs im Gewebe sichtbare Anlaufstellen auftreten. Es hat sich gezeigt, dass durch die bisher bekannten Massnahmen, insbesondere bei Webmaschinen mit hoher Drehzahl und entsprechend hoher Schusseintragsleistung, die Bildung soicherAniaufsteiien nicht zuverlässig verhindert werden kann.According to a known method of the type mentioned, the goods edge is held in a forward avoidance position at a distance from the stop position of the sley until a certain lifting force is reached (JP Patent Publication 2-169749) Rule reached in the second weaving cycle, so that in the known embodiment the weft insertion can take place after the first weaving cycle which is carried out in idle mode. In the manufacture of delicate fabrics, e.g. lighter fabric for the women's outer clothing, visible contact points can appear when restarting the weaving machine to continue the interrupted weaving process in the fabric. It has been shown that the measures known hitherto, in particular in the case of looms with a high speed and correspondingly high weft insertion rate, cannot reliably prevent the formation of such an increase.

Der Erfindung liegt die Aufgabe zugrunde, ein insbesondere in dieser Hinsicht verbessertes Verfahren zum Starten einer Webmaschine, insbesondere zum Wiederstarten nach erfolgter Behebung einer Betriebsstörung, zu schaffen, durch welches auch bei Webmaschinen mit hoher Schusseintragsleistung die Bildung von Anlaufstellen im Gewebe sicher vermieden wird.The invention has for its object to provide a method, particularly improved in this respect, for starting a weaving machine, in particular for restarting after a malfunction has been remedied, by which the formation of contact points in the fabric is reliably avoided even in weaving machines with a high weft insertion rate.

Diese Aufgabe wird erfindungsgemäss durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved according to the invention by the features specified in the characterizing part of claim 1.

Die erfindungsgemässe, vom Webprogramm unabhängige Ansteuerung der Fachbildevorrichtung und mindestens einer der Kettablass- und Warenabzugsvorrichtungen gestattet eine gezielte Beeinflussung der für ein gleichmässiges Gewebebild massgebenden Parameter, insbesondere eine Wiederherstellung der vor der Unterbrechung des Webvorganges bestehenden Spannung der Kettfäden, bis die Webmaschine ihre ursprüngliche, dem normalen Webbetrieb entsprechende Drehzahl und ihren entsprechenden, aus dem Zusammenwirken der einzelnen Aggregate resultierenden dynamischen Betriebszustand erreicht hat. Aufgrund eines beim Erreichen dieses Betriebszustandes ausgelösten Steuersignals einer üblichen Ueberwachungseinrichtung der Webmaschine sind die Fachbildevorrichtung und die damit zusammenwirkenden Aggregate jederzeit, d.h. nach jedem der im Leerlauf ausgeführten Webzyklen, auf das betriebsmässige Webprogramm zur Einleitung der zweiten Startphase des erfindungsgemässen Verfahrens umschaltbar.The control of the shedding device and at least one of the warp let-off and fabric take-off devices according to the invention, which is independent of the weaving program, permits a targeted influencing of the parameters which are decisive for a uniform fabric image, in particular a restoration of the tension of the warp threads existing before the weaving process is interrupted, until the weaving machine returns to its original, the normal weaving operation has reached the corresponding speed and its corresponding dynamic operating state resulting from the interaction of the individual units. On the basis of a control signal from a conventional monitoring device of the weaving machine that is triggered when this operating state is reached, the shedding device and the aggregates interacting therewith can be operated at any time, i.e. after each of the idle weaving cycles, switchable to the operational weaving program to initiate the second starting phase of the method according to the invention.

Ausgestaltungen der Erfindung sind in den abhängigen Patentansprüchen angegeben.Embodiments of the invention are specified in the dependent claims.

Die erfindungsgemässe Webmaschine zur Durchführung des Verfahrens ist Gegenstand des Anspruchs 5.The weaving machine according to the invention for carrying out the method is the subject of claim 5.

Weitere Einzelheiten ergeben sich aus der folgenden Beschreibung eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels der Erfindung, in Verbindung mit den Ansprüchen. Es zeigen:

  • Fig. 1 Teile einer zur Durchführung des erfindungsgemässen Verfahrens geeigneten Webmaschine in einer stark vereinfachten Seitenansicht;
  • Fig. 1a eine Teilansicht der für eine Ausführungsform des erfindungsgemässen Verfahrens eingerichteten Webmaschine;
  • Fig. 2 ein Webfachdiagramm der Webmaschine während der Startphasen des erfindungsgemässen Verfahrens, und
  • Fig. 3 und 4 entsprechende Webfachdiagramme der Webmaschine, je nach einer weiteren Ausführungsform.
Further details emerge from the following description of an exemplary embodiment of the invention shown schematically in the drawing, in conjunction with the claims. Show it:
  • 1 shows parts of a weaving machine suitable for carrying out the method according to the invention in a greatly simplified side view;
  • 1a shows a partial view of the weaving machine set up for an embodiment of the method according to the invention;
  • 2 shows a shed diagram of the weaving machine during the starting phases of the method according to the invention, and
  • 3 and 4 corresponding shed diagrams of the weaving machine, depending on a further embodiment.

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 Ila 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 take-off roller 6, a pressure roller 7 and a load beam 8. The warp beam 1 is equipped with a warp let-off device 10 according to the Arrows 11 and Ila coupled to be driven. Correspondingly, the goods take-off roller 6 is coupled to be driven by a goods take-off device 12 in accordance with the arrows 13 and 13a. Warp threads 14 are guided from the warp beam 1 through the shedding device 3 against a fabric edge 15 and from there 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 einerAnschlagposition 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 goods edge 15 and 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 Einrichtung 26 zur Erfassung eines Fehlers, z.B. eines fehlerhaft eingetragenen Schussfadens 22, im gebildeten Gewebe 16 angedeutet. Der Sensor 25 und die Einrichtung 26 sind über die Signalleitungen 27 bzw. 28 mit der Steuervorrichtung 24 verbunden. 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 as well as 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 e.g. the tension of the warp threads 14 and the weft threads 22 as well as the condition of the fabric 16 formed is detected. In the drawing, a sensor 25 for monitoring the position of the goods edge 15 and a device 26 for detecting an error, e.g. an incorrectly entered weft thread 22, indicated in the fabric 16 formed. The sensor 25 and the device 26 are connected to the control device 24 via the signal lines 27 and 28, respectively. The drives of the individual units of the weaving machine are coordinated with one another via the control device 24 and are controlled in accordance with the predetermined weaving program during normal weaving operation.

Beim Auftreten einer Betriebsstörung, z.B. eines Kett- oder Schussfadenbruchs oder eines Fehlers bei der Gewebebildung, wird die Webmaschine durch ein entsprechendes Steuersignal des betreffenden Ueberwachungselementes stillgesetzt und gegebenenfalls, etwa zum Entfernen eines fehlerhaft eingetragenen Schussfadens, durch Zurückstellen derentsprechenden Aggregate - der Kettablassvorrichtung 10, der Warenabzugsvorrichtung 12 und der Fachbildevorrichtung 3 - in eine für die programmgemässe Fortsetzung des unterbrochenen Webvorganges bestimmte Betriebsstellung zurückgeführt.If a malfunction occurs, e.g. a warp or weft break or an error in fabric formation, the weaving machine is stopped by a corresponding control signal of the monitoring element in question and, if necessary, for example to remove an incorrectly inserted weft thread, by resetting the corresponding units - the warp let-off device 10, the goods take-off device 12 and the shedding device 3 - Returned to an operating position intended for the program continuation of the interrupted weaving process.

Zum Starten der Webmaschine nach erfolgter Behebung der Betriebsstörung wird vorgängig, durch schrittweisen Antrieb des Kettbaums 1 und der Warenabzugswalze 6 entsprechend den Pfeilen 11 bzw. 13, der Warenrand 15 aus der mit vollen Linien dargestellten Position in eine von der Anschlagposition 4' der Weblade 4 entfernte, strichpunktiert dargestellte Ausweichstellung 15' verstellt und in dieser während eines Teils einer ersten Startphase gehalten. In dieser ersten Startphase kann zuerst der mit mindestens einem Aggregat der Webmaschine, z.B. der Schusseintragsvorrichtung, getrieblich verbundene, nicht dargestellte Hauptantrieb der Webmaschine gestartet und anschliessend jeweils wenigstens eines der übrigen Aggregate - die Fachbildevorrichtung 3, die Kettablassvorrichtung 10 und die Warenabzugsvorrichtung 12 sowie gegebenenfalls die Weblade 4- wahlweise nacheinander zugeschaltet werden. Entsprechend wird die Webmaschine - bei blockierter Schussfadenzufuhr zum Schusseintragsmittel 21 - während einer Anzahl, z.B. zwei bis zwanzig oder mehr, Webzyklen im Leerlauf angetrieben, bis sie ihre dem normalen Webbetrieb entsprechende, ursprüngliche Drehzahl erreicht hat, die ursprüngliche Spannung der Kettfäden 14 wieder hergestellt ist und alle ihre Aggregate im entsprechenden, ursprünglichen Rhythmus zusammenwirken.To start the weaving machine after the malfunction has been remedied, the goods edge 15 is moved from the position shown in full lines to one of the stop position 4 ′ of the sley 4 by stepwise driving the warp beam 1 and the goods take-off roller 6 according to the arrows 11 and 13 respectively removed, dash-dotted alternative position 15 'adjusted and held in this during part of a first starting phase. In this first starting phase, the one with at least one unit of the weaving machine, e.g. the weft insertion device, a geared main drive (not shown) of the weaving machine is started and then at least one of the other units - the shedding device 3, the warp let-off device 10 and the fabric take-off device 12 and optionally the sley 4 - are optionally switched on one after the other. Accordingly, the weaving machine - when the weft feed to the weft insertion means 21 is blocked - is used for a number, e.g. two to twenty or more, idle weaving cycles until it has reached its original speed corresponding to normal weaving operation, the original tension of the warp threads 14 is restored and all of their aggregates work together in the appropriate, original rhythm.

Während dieser ersten Startphase wird die Fachbildevorrichtung 3 über die Steuervorrichtung 24 unabhängig vom betriebsmässig vorgesehenen Webprogramm so angesteuert, dass die Webschäfte 17 in jedem der im Leerlauf ausgeführten Webzyklen eine Stellung einnehmen, welche einer Offenstellung des Webfachs 20 entspricht, in der der zuletzt korrekt eingetragene Schussfaden 22 durch die Kettfäden 14 am Warenrand 15 in der Ausweichstellung 15' sicher eingebunden gehalten wird. Je nach der Art des herzustellenden Gewebes können die Webschäfte 17, entsprechend der Darstellung nach Fig. 2, über alle Webzyklen der ersten Startphase in der gleichen Offenfachstellung gehalten oder, wie in den Fig. 3 und 4 dargestellt, nach einem eigenen, vom betriebsmässigen Webprogramm abweichenden Startprogramm gesteuert werden. Wenn die für die Fortsetzung des betriebsmässigen Webvorganges erforderlichen Betriebsbedingungen erfüllt sind, wird auf ein entsprechendes Steuersignal mindestens einer der Ueberwachungseinrichtungen der Webmaschine, z.B. der dem Gewebe 16 zugeordneten Einrichtung 26 oder eines nicht dargestellten, die Spannung der Kettfäden 14 erfassenden Wächterelementes, über die Steuervorrichtung 24 eine Rückwärtsdrehung des Kettbaums 1 und/oder der Warenabzugswalze 6 in Richtung der Pfeile Ila bzw. 13a eingeleitet und der Warenrand 15 gegen die Anschlagposition 4' der Weblade 4 zurückgeführt.During this first starting phase, the shedding device 3 is controlled via the control device 24 independently of the weaving program provided in the operational manner in such a way that the heald frames 17 assume a position in each of the idle weaving cycles that corresponds to an open position of the shed 20 in which the last correctly inserted weft thread 22 is securely bound by the warp threads 14 on the fabric edge 15 in the avoidance position 15 '. Depending on the type of fabric to be produced, the heald frames 17, as shown in FIG. 2, can be kept in the same open shed position over all weaving cycles of the first starting phase or, as shown in FIGS. 3 and 4, according to their own, from the operational weaving program different start program can be controlled. If the operating conditions required for the continuation of the operational weaving process are fulfilled, at least one of the monitoring devices of the weaving machine, e.g. the device 26 assigned to the fabric 16 or a guard element, not shown, which detects the tension of the warp threads 14, initiates a reverse rotation of the warp beam 1 and / or the goods take-off roller 6 in the direction of the arrows Ila or 13a via the control device 24 and the goods edge 15 against the Stop position 4 'of the sley 4 returned.

In der zweiten Startphase werden die Fachbildevorrichtung 3, die Kettablassvorrichtung 10 und die Warenabzugsvorrichtung 12 wieder entsprechend dem betriebsmässig vorbestimmten Webprogramm im Sinne einer Fortsetzung des unterbrochenen Webvorganges angesteuert, wobei der Schussfaden 22 an das Schusseintragsmittel 21 übergeben, in das dem Webprogramm entsprechend gebildete Webfach 20 eingetragen, an den Warenrand 15 angeschlagen und durch einen programmgemäss folgenden Fachwechsel eingebunden wird. Da dieser Schusseintrag, aufgrund des erfindungsgemässen Startverfahrens, bei gleicher Kettfadenspannung und unter gleichen dynamischen Betriebsbedingungen erfolgt wie der vor der Unterbrechung des Webvorganges ausgeführte Schusseintrag, kann die Bildung einer sichtbaren Anlaufstelle im Gewebe in den meisten Fällen sicher vermieden werden.In the second starting phase, the shedding device 3, the warp let-off device 10 and the take-off device 12 are again activated in accordance with the operationally predetermined weaving program in the sense of a continuation of the interrupted weaving process, the weft thread 22 being transferred to the weft insertion means 21 into the weaving shed 20 formed according to the weaving program , is struck on the goods edge 15 and is integrated by a program-specific following change of subject. Since this weft insertion takes place with the same warp thread tension and under the same dynamic operating conditions as that before the interruption of the Weft insertion carried out during the weaving process, the formation of a visible contact point in the fabric can be avoided in most cases.

In gewissen Fällen, z.B. bei der Herstellung von extrem dünnen, nahezu durchsichtigen Geweben, hat sich gezeigt, dass, je nach dem zu verarbeitenden Fadenmaterial, bei den auf den ersten Schusseintrag nach der zweiten Startphase II folgenden Schusseinträgen Gewebestreifen auftreten können, obwohl alle vorstehend erwähnten Aggregate der Webmaschine den für den normalen Webbetrieb erforderlichen Betriebszustand erreicht haben und die Spannung der Kettfäden sowie die Drehzahl der Webmaschine und alle weiteren Parameter mit den entsprechenden Werten vor der Unterbrechung des Webvorganges übereinstimmen. Um auch derartige, relativ selten auftretende Abweichungen im Gewebebild zu verhindern, kann nach einer Ausführungsform des erfindungsgemässen Verfahrens der aus der Ausweichstellung 15' zurückbewegte Warenrand 15 am Ende der ersten Startphase I in eine in der Fig. 1 a angedeutete Ausgleichsstellung 15a oder 15b geführt und in dieser Stellung gehalten werden, welche gegenüber einer der Anschlagposition 4' der Weblade 4 entsprechenden Sollstellung um ein einstellbares Mass - ein Untermass in der Stellung 15a bzw. ein entsprechendes Uebermass in der Stellung 15b - versetzt ist.In certain cases, e.g. in the production of extremely thin, almost transparent fabrics, it has been shown that, depending on the thread material to be processed, fabric strips may appear in the weft entries following the first weft insertion after the second start phase II, although all of the aforementioned units of the weaving machine are suitable for have reached the normal operating condition required for operation and the tension of the warp threads as well as the speed of the weaving machine and all other parameters match the corresponding values before the interruption of the weaving process. In order to prevent such, relatively rarely occurring, deviations in the tissue image, according to one embodiment of the method according to the invention, the goods edge 15 moved back from the avoidance position 15 'at the end of the first starting phase I can be guided into a compensating position 15a or 15b indicated in FIG are held in this position, which is offset by an adjustable dimension - an undersize in position 15a or a corresponding excess in position 15b - relative to a desired position corresponding to the stop position 4 'of the sley 4.

Dieses Mass der Versetzung entspricht einem definierten Bruchteil, z.B. 20 bis 60%, des nach jedem Schusseintrag auszuführenden, durch das Webprogramm bestimmten Kett- und Gewebevorschubs und ist jeweils, z.B. entsprechend den Eigenschaften des zu verarbeitenden Kett- und/oder Schussfadenmaterials, über die Kettablassvorrichtung 10 und/oder die Warenabzugsvorrichtung 12 oder durch entsprechende Ansteuerung des Spannbaums 2 und/oder des Brustbaums 5 beeinflussbar. Nach dem in der zweiten Startphase II ausgeführten ersten Schusseintrag wird der Warenrand 15 aus der Ausgleichsstellung 15a bzw. 15b in einer vorbestimmten Anzahl, z.B. einem bis zehn oder mehr, unter sich gleichen Teilschritten jeweils vor einem der folgenden Schusseinträge in eine entsprechende Zwischenstellung und schliesslich in die Sollstellung geführt.This degree of dislocation corresponds to a defined fraction, e.g. 20 to 60% of the warp and fabric feed determined by the weaving program after each weft insertion and is in each case, e.g. can be influenced in accordance with the properties of the warp and / or weft material to be processed, via the warp let-off device 10 and / or the goods take-off device 12 or by appropriate activation of the tensioning arm 2 and / or the breast arm 5. After the first weft insertion carried out in the second starting phase II, the goods edge 15 is removed from the compensating position 15a or 15b in a predetermined number, e.g. one to ten or more, the same sub-steps each before one of the following weft entries into an appropriate intermediate position and finally into the target position.

Auf diese Weise kann die durch den eingestellten Kett- und Gewebevorschub bestimmte, betriebsmässig konstant gehaltene Schussdichte des Gewebes 16 innerhalb der vorgegebenen Grenzen varriert und damit innerhalb eines durch die Anzahl der Teilschritte begrenzten, wählbaren Gewebeabschnitts die Entstehung eines Gewebefehlers verhindert werden, der insbesondere dann auftritt, wenn bei konstanter Schussdichte die Umschlingungswinkel der die Schussfäden umschlingenden Kettfäden von einem beim den normalen Webbetrieb sich einstellenden Sollwert abweichen. Durch diese Ausführurungsform des erfindungsgemässen Verfahrens können somit unterschiedliche Umschlingungswinkel der die Schussfäden umschlingenden Kettfäden ausgeglichen und schrittweise an den betriebsmässigen Sollwert dieses Umschlingungswinkels angeglichen werden. Entsprechend kann auch die Entstehung einer sichtbaren Anlaufstelle im Gewebe 16 verhindert und ein im wesentlichen gleichmässiges Gewebebild erzielt werden.In this way, the operationally constant weft density of the fabric 16, which is determined by the set warp and fabric feed, can be varied within the predetermined limits and thus prevent the occurrence of a fabric defect which occurs in particular within a selectable fabric section limited by the number of partial steps , if, at constant weft density, the wrap angle of the warp threads wrapping around the weft threads deviate from a target value which is established in normal weaving operation. By means of this embodiment of the method according to the invention, different wrap angles of the warp threads wrapping around the weft threads can thus be compensated and gradually adjusted to the operational target value of this wrap angle. Correspondingly, the formation of a visible contact point in the tissue 16 can also be prevented and an essentially uniform tissue image can be achieved.

Die Richtung und das Mass der jeweils erforderlichen Versetzung der Ausgleichsstellung 15a bzw. 15b gegenüber der Anschlagposition 4' der Weblade 4 können, z.B. beim Anweben der mit dem entsprechenden Kett- und Schussfadenmaterial belegten Webmaschine, durch probeweise ausgeführte Startvorgänge der Webmaschine ermittelt und entsprechend dem dabei erzielbaren Ergebnis eingestellt werden. Durch entsprechende Programmierung der Steuervorrichtung 24 kann, z.B. über eine Ansteuerung des Spannbaums 2 und/ oder des Brustbaums 5, die beschriebene Korrektur der Warenrandstellung jeweils automatisch durchgeführt werden.The direction and the degree of the required displacement of the compensation position 15a or 15b relative to the stop position 4 'of the sley 4 can e.g. when weaving the weaving machine covered with the corresponding warp and weft material, determined by starting operations of the weaving machine carried out on a trial basis and adjusted according to the result that can be achieved in the process. By appropriate programming of the control device 24, e.g. The described correction of the position of the goods at the edge of the goods can be carried out automatically in each case by actuating the tensioning tree 2 and / or the breast tree 5.

Zur Steuerung der Fachbildevorrichtung 3 während der ersten Startphase kann in der Steuervorrichtung 24 eine eigene, während der ersten Startphase aktivierbare und vor dem Beginn der zweiten Startphase abschaltbare Steuereinheit 24a vorgesehen sein. Eine entsprechende Steuereinheit 24a kann auch als Einbauteil ausgebildet sein, der wahlweise, etwa zur Nachrüstung einer bestehenden Webmaschine, in eine vorhandene Steuervorrichtung eingebaut werden kann. Anstelle der beschriebenen Fachbildevorrichtung 3 mit Webschäften 17 kann auch eine andere Fachbildevorrichtung, z.B. eine Jacquard-Vorrichtung, vorgesehen sein.To control the shedding device 3 during the first starting phase, a separate control unit 24a can be provided in the control device 24, which can be activated during the first starting phase and can be switched off before the start of the second starting phase. A corresponding control unit 24a can also be designed as an installation part, which can optionally be installed in an existing control device, for example for retrofitting an existing weaving machine. Instead of the described shedding device 3 with heald frames 17, another shedding device, e.g. a jacquard device may be provided.

Das Webfachdiagramm nach Fig. 2 zeigt ein Webfach 20a mit einem vor der Unterbrechung des Webvorganges in einem Webzyklus Wa eingetragenen Schussfaden 22a, ein entsprechend dem vorbestimmten Webprogramm für den nächsten Schusseintrag gebildetes Webfach 20b mit einem in einem Webzyklus Wb eingetragenen Schussfaden 22b sowie ein programmgemäss anschliessendes Webfach 20c mit einem in einem Webzyklus Wc eingetragenen Schussfaden 22c. Das Webfach 20b ist über mehrere, dargestellungsgemäss fünf, im Leerlauf ausgeführte Webzyklen W1 bis W5 der ersten Startphase 1 sowie im Webzyklus Wb der zweiten Startphase in der Offenstellung gehalten, in welcher der Schussfaden 22b programmgemäss eingetragen wird.The shed diagram according to FIG. 2 shows a shed 20a with a weft 22a entered in a weaving cycle Wa before the interruption of the weaving process, a shed 20b formed in accordance with the predetermined weaving program for the next weft insertion with a weft 22b entered in a weaving cycle Wb, and a subsequent one according to the program Shed 20c with a weft 22c entered in a weaving cycle Wc. The shed 20b is held in the open position over a plurality of, as shown, five weaving cycles W1 to W5 of the first starting phase 1, as well as in the weaving cycle Wb of the second starting phase, in which the weft thread 22b is entered according to the program.

Wie aus der Fig. 3 hervorgeht, kann sich die erste Startphase über eine Anzahl, darstellungsgemäss vier Leerlauf-Webzyklen W1 bis W4 erstrecken, wobei in den Webzyklen W1, W3 und Wb jeweils das vorstehend beschriebene Webfach 20b gebildet wird, während in den Webzyklen W2 und W4 jeweils ein anderes Webfach 20x gebildet wird, welches im betriebsmässigen Webprogramm nicht vorkommt, so dass der Schussfaden 22a sicher eingebunden gehalten wird.As can be seen from FIG. 3, the first start phase can extend over a number, as shown four idle weaving cycles W1 to W4, the weaving shed 20b described above being formed in weaving cycles W1, W3 and Wb, while in weaving cycles W2 and W4 a different shed 20x is formed, which does not appear in the operational weaving program, so that the weft thread 22a is securely bound.

Entsprechend der Darstellung nach Fig. 4 kann das Webfach 20b über mehrere, darstellungsgemäss drei, Leerlauf-Webzyklen W1, W2 und W3 in der entsprechenden Offenstellung gehalten und mit dem im Leerlauf-Webzyklus W4 gebildeten Webfach 20x kombiniert werden.According to the illustration according to FIG. 4, the shed 20b can be held in the corresponding open position over several, as shown three, idle weaving cycles W1, W2 and W3 and combined with the shed 20x formed in the idle weaving cycle W4.

Claims (6)

1. Verfahren zum Starten einer Webmaschine nach einer Stillstandsphase, insbesondere nach einer Unterbrechung des Webvorganges zwecks Behebung eines Fehlers bei der Gewebebildung, welche Webmaschine eine Kettablassvorrichtung (10), eine Warenabzugsvorrichtung (12), eine Fachbildevorrichtung (3) und eine Weblade (4) zum Anschlagen eines jeweils in ein Webfach (20; 20a, 20b,20c) eingetragenen Schussfadens (22; 22a, 22b, 22c) an den Warenrand (15) des Gewebes enthält, wobei in einer ersten Startphase (I) der Warenrand (15) in einer von einer Anschlagposition (4') der Weblade (4) entfernten Ausweichstellung (15') gehalten, eine Schussfadenzufuhr in das Webfach (20; 20b) blockiert und die Webmaschine im Leerlauf angetrieben sowie der Warenrand (15) anschliessend gegen die Anschlagposition (4') der Weblade (4) zurückgeführt wird und wobei in einer zweiten Startphase (11) der Schussfaden (22; 22b) in das Webfach (20; 20b) eingetragen wird, dadurch gekennzeichnet, dass die Fachbildevorrichtung (3) sowie die Kettablassvorrichtung (10) und/oderdie Warenabzugsvorrichtung (12) über eine Steuervorrichtung (24), welche zur betriebsmässigen Steuerung der Webmaschine entsprechend einem vorbestimmten Webprogramm vorgesehen ist, in der ersten Startphase (I) während mehrerer Webzyklen (W1, W2, W3, W4, W5) von diesem Webprogramm unabhängig angesteuert werden, wobei die Fachbildevorrichtung (3) in jedem der im Leerlauf ausgeführten Webzyklen (W1 - W5) eine Betriebsstellung einnimmt, die einer Offenstellung des Webfaches (20; 20b, 20x) entspricht, in welcher der am Warenrand (15) befindliche Schussfaden (22; 22a) eingebunden gehalten wird, und wobei der Warenrand (15) über die entsprechend ansteuerbare Kettablassvorrichtung (10) und/oder die Warenabzugsvorrichtung (12) kontrolliert an die Anschlagposition (4') der Weblade (4) herangeführt wird, und dass die Fachbildevorrichtung (3) sowie die Kettablassvorrichtung (10) und die Warenabzugsvorrichtung (12) in der zweiten Startphase (11) dem Webprogramm entsprechend im Sinne einer Fortsetzung des Webvorganges angesteuert werden.1. Method for starting a weaving machine after a standstill phase, in particular after an interruption of the weaving process in order to correct an error in the formation of the fabric, which weaving machine has a warp let-off device (10), a goods take-off device (12), a shedding device (3) and a weaving drawer (4) for striking a weft thread (22; 22a, 22b, 22c) entered into a shed (20; 20a, 20b, 20c) against the fabric edge (15) of the fabric, with the fabric edge (15) in a first starting phase (I) is held in an alternative position (15 ') distant from a stop position (4') of the sley (4), a weft feed into the shed (20; 20b) is blocked and the weaving machine is driven at idle speed and the fabric edge (15) then against the stop position ( 4 ') of the sley (4) is returned and wherein in a second starting phase (11) the weft thread (22; 22b) is inserted into the shed (20; 20b), characterized in that the shedding device (3) and the warp let-off device (10) and / or the goods take-off device (12) via a control device (24), which is provided for the operational control of the weaving machine in accordance with a predetermined weaving program, in the first starting phase (I) during several weaving cycles (W1, W2, W3, W4, W5) are controlled independently by this weaving program, the shedding device (3) assuming an operating position in each of the idle weaving cycles (W1 - W5) which indicates an open position of the shed (20; 20b, 20x), in which the weft thread (22; 22a) located on the fabric edge (15) is kept bound, and the fabric edge (15) is controlled in a controlled manner via the warp let-off device (10) and / or the fabric take-off device (12) which can be controlled accordingly the stop position (4 ') of the sley (4) is brought up and that the shedding device (3) as well as the warp let-off device (10) and the fabric take-off device (12) are controlled in the second starting phase (11) in accordance with the weaving program in the sense of a continuation of the weaving process will. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Fachbildevorrichtung (3) zumindest während eines Teils der ersten Startphase (I) in einer Betriebsstellung gehalten wird, welche einer über mehrere Webzyklen (W1, W2, W3; W4, W5) sich erstreckenden Offenstellung des Webfaches (20; 20b) entspricht.2. The method according to claim 1, characterized in that the shedding device (3) is held at least during part of the first start phase (I) in an operating position which one over several weaving cycles (W1, W2, W3; W4, W5) extending Open position of the shed (20; 20b) corresponds. 3. Verfahren nach Anspruch 1 oder2, dadurch gekennzeichnet, dass die Fachbildevorrichtung (3) zumindest während eines Teils der ersten Startphase (I) nach einem eigenen, vom Webprogramm abweichenden Startprogramm angesteuert und in mindestens einem der Webzyklen (W2, W4) in einer Betriebsstellung gehalten wird, die einer Offenstellung eines im Webprogramm nicht enthaltenen Webfaches (20x) entspricht.3. The method according to claim 1 or 2, characterized in that the shedding device (3) is controlled at least during part of the first starting phase (I) according to its own starting program deviating from the weaving program and in at least one of the weaving cycles (W2, W4) in an operating position is held, which corresponds to an open position of a shed not included in the weaving program (20x). 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Warenrand (15) am Ende derersten Startphase (I) in eine der Anschiagposition (4') derweblade (4) zugeordnete Ausgieichsstellung (15a bzw. 15b) geführt wird, die gegenüber einer der Anschlagposition (4') entsprechenden Sollstellung um ein Mass versetzt ist, welches einem definierten, z.B. überdie Steuereinrichtung (24) beeinflussbaren Bruchteil eines durch das Webprogramm bestimmten, nach jedem Schusseintrag vorgesehenen Vorschubs des Gewebes (16) entspricht, und aus dieser Ausgleichsstellung (15a bzw. 15b) nach dem in der zweiten Startphase (11) erfolgten ersten Schusseintrag in einer vorbestimmten Anzahl Teilschritten jeweils vor einem der folgenden Schusseinträge gegen die Sollstellung geführt wird.4. The method according to any one of claims 1 to 3, characterized in that the goods edge (15) at the end of the first starting phase (I) is guided into a balancing position (15a or 15b) assigned to the viewing position (4 ') of the drawer (4), the set position corresponding to the stop position (4 ') is offset by an amount which corresponds to a defined, for example via the control device (24) can be influenced a fraction of a feed of the fabric (16) determined by the weaving program and provided after each weft insertion, and from this compensation position (15a or 15b) after the first weft insertion in the second starting phase (11) in a predetermined one Number of steps in each case before one of the following weft entries against the target position. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zuerst ein mit mindestens einem Aggregat der Webmaschine, z.B. einer Schusseintragsvorrichtung, getrieblich verbundener Hauptantrieb der Webmaschine gestartet wird, dass während der folgenden Webzyklen (W1 - W5) der ersten Startphase (I) wahlweise nacheinander jeweils wenigstens ein weiteres Aggregat - die Fachbildevorrichtung (3), die Weblade (4) sowie die Kettablassvorrichtung (10) und die Warenabzugsvorrichtung (12) - zugeschaltet wird, und dass in der zweiten Startphase (II) der Schussfaden (22) einem Schusseintragsmittel (21) zugeführt und/oder für den Schusseintrag freigegeben wird.5. The method according to any one of claims 1 to 4, characterized in that first with at least one unit of the loom, e.g. a weft insertion device, geared main drive of the weaving machine is started, that during the following weaving cycles (W1 - W5) of the first starting phase (I), at least one further unit - the shedding device (3), the weaving drawer (4) and the warp let-off device ( 10) and the goods take-off device (12) - is switched on, and that in the second starting phase (II) the weft thread (22) is fed to a weft insertion means (21) and / or released for the weft insertion. 6. Webmaschine zur Durchführung des Verfahrens nach einem derAnsprüche 1 bis 5, dadurch gekennzeichnet, dass die Steuervorrichtung (24) eine zumindest während der ersten Startphase (I) aktivierbare und in der zweiten Startphase (11) in Abhängigkeit von einem Steuersignal einer Ueberwachungseinrichtung der Webmaschine, z.B. eines eine vorbestimmte Position des Warenrandes (15) erfassenden Wächterelementes (25), abschaltbare Steuereinheit (24a) aufweist, welche eine vom betriebsmässig vorgesehenen Webprogramm unabhängige Ansteuerung der Fachbildevorrichtung (3) sowie der Kettablassvorrichtung (10) und/oder der Warenabzugsvorrichtung (12) gestattet.6. Loom for carrying out the method according to one of claims 1 to 5, characterized in that the control device (24) activates at least during the first start phase (I) and in the second start phase (11) as a function of a control signal from a monitoring device of the weaving machine , e.g. a guard element (25), which detects a predetermined position of the goods edge (15), has a control unit (24a) which can be switched off and which permits control of the shedding device (3) and the warp let-off device (10) and / or the goods take-off device (12) independently of the operationally provided weaving program .
EP93810211A 1992-04-22 1993-03-24 Process for starting a loom and loom for effecting the same Expired - Lifetime EP0567428B1 (en)

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EP93810211A EP0567428B1 (en) 1992-04-22 1993-03-24 Process for starting a loom and loom for effecting the same

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EP92810293 1992-04-22
EP92810293 1992-04-22
EP93810211A EP0567428B1 (en) 1992-04-22 1993-03-24 Process for starting a loom and loom for effecting the same

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EP0567428B1 EP0567428B1 (en) 1997-08-20

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0629725A1 (en) * 1993-06-15 1994-12-21 Sulzer RàœTi Ag Process for starting a loom and loom for effecting the same
DE4438762C1 (en) * 1994-10-29 1995-09-28 Dornier Gmbh Lindauer Weaving errors are avoided in an automatic esp. pneumatic loom
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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0119121A1 (en) * 1983-03-09 1984-09-19 Societe Alsacienne De Construction De Materiel Textile Process and device to prevent cloth faults due to loom arrests
DE3642913A1 (en) * 1986-12-16 1988-08-04 Kaiser Gmbh & Co Kg Method for controlling a weaving machine and weaving machine for carrying out the method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0119121A1 (en) * 1983-03-09 1984-09-19 Societe Alsacienne De Construction De Materiel Textile Process and device to prevent cloth faults due to loom arrests
DE3642913A1 (en) * 1986-12-16 1988-08-04 Kaiser Gmbh & Co Kg Method for controlling a weaving machine and weaving machine for carrying out the method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 435 (C-0760)18. September 1990 & JP-A-02 169 749 ( TSUDAKOMA ) 29. Juni 1990 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0629725A1 (en) * 1993-06-15 1994-12-21 Sulzer RàœTi Ag Process for starting a loom and loom for effecting the same
DE4438762C1 (en) * 1994-10-29 1995-09-28 Dornier Gmbh Lindauer Weaving errors are avoided in an automatic esp. pneumatic loom
EP0715010A1 (en) 1994-10-29 1996-06-05 Lindauer Dornier Gesellschaft M.B.H Method to prevent weaving faults on flat woven or pile fabrics
US5590692A (en) * 1994-10-29 1997-01-07 Lindauer Dornier Gesellschaft Mbh Method for avoiding fabric faults during transitional loom operating conditions
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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