EP0409773A1 - Weft changing device for a loom - Google Patents

Weft changing device for a loom Download PDF

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Publication number
EP0409773A1
EP0409773A1 EP90810469A EP90810469A EP0409773A1 EP 0409773 A1 EP0409773 A1 EP 0409773A1 EP 90810469 A EP90810469 A EP 90810469A EP 90810469 A EP90810469 A EP 90810469A EP 0409773 A1 EP0409773 A1 EP 0409773A1
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EP
European Patent Office
Prior art keywords
push rod
bore
plunger
weft
lifting magnet
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
EP90810469A
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German (de)
French (fr)
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EP0409773B1 (en
Inventor
Peter Riesen
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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Publication date
Application filed by Sulzer AG, Sultex AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0409773A1 publication Critical patent/EP0409773A1/en
Application granted granted Critical
Publication of EP0409773B1 publication Critical patent/EP0409773B1/en
Anticipated expiration legal-status Critical
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    • 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 thread changing device with which different weft threads can optionally be presented to an entry member, the device being formed by a multi-link mechanism in which a drive member can be coupled to an output member by an actuator according to the program.
  • Such a device is known from DE-PS 37 16 124 C1.
  • a cam mechanism is monotonously moved from one extreme position to another extreme position by a cam mechanism, in the meantime rest periods are maintained during a work cycle.
  • rest periods are maintained during a work cycle.
  • an electromagnet moves a driving pin into a groove, the groove lying on a drive member for a thread feeder.
  • the electromagnets required for the exchange process sit on the transmission elements and must be moved continuously. They increase the total mass of the multi-link transmission, which is already overloaded anyway and is constantly in motion.
  • the drive member is formed by a pivot lever and the output slide by a push rod, and that the push rod can be moved transversely to its pushing direction by the actuating element, a pivot point of the push rod optionally having a corresponding pivot point of a pivot lever in Connection or out of engagement of this is movable.
  • the push rod When connecting both pivot points, the push rod is in the working position, otherwise in the rest position.
  • the push rod has a bore which represents the pivot point of the push rod, and the pivot lever has a driver adapted to the bore as a pivot point, the driver being in engagement with the bore for the weft thread changing process.
  • the actuating element can be formed by a solenoid with a plunger which, according to the program, causes the transverse displacement of the push rod.
  • the push rod can have a second bore, into which a stationary locking element engages when the push rod is controlled into the rest position by the actuator.
  • the plunger of the lifting magnet can have two shoulders with which the plunger can be acted upon by the plunger in the region of the elongated hole. It is advantageous to guide the push rod in an elongated hole on the ram.
  • the hole in the push rod is preferably circular, and the driver the swivel lever is a circular bolt that fits the hole.
  • the multi-link mechanism With the device according to the invention, the multi-link mechanism, with the exception of the driving pivot lever, is only moved during the changing process. As a result, there is little or no wear at the pivot points of the multi-link transmission.
  • the push rod can be very precisely coupled to or decoupled from the swivel lever by the lifting magnet.
  • the device according to the invention is characterized by its simple structure, the few moving links and precise control during the changing process. Since the solenoid is stationary, there are no problems with its placement and electrical connections.
  • the weft thread changing device 1 is driven by a swivel lever 5 which, for example, with a Cam gear is connected.
  • the pivot lever 5 comes into a front extended and rear dash-dotted position, whereby it swings from the front position to the rear position and back to the front position during a change process.
  • the pivot lever 5 is then stopped for the rest of the weaving cycle.
  • the actuating element 7 which is expediently designed as a lifting magnet, can disengage the pull tab 6 at the articulation points 51 and 61 of the pivoting lever and the push rod, respectively, by means of a plunger 71 which carries the shoulders 73 and 74 and in between an elongated hole 62 leads the push rod 6, pull the push rod 6 in the bore 60 from the driver 51 of the pivot lever.
  • the plunger 71 is attracted to the actuating element or solenoid 7.
  • a second bore 66 is made through a locking element 8 in the form of a pin, so that the entire multi-link mechanism is blocked.
  • the lifting magnet 7 is excited when the control of the weaving machine gives an impulse for a change of position, whereupon the plunger 71 is again moved out of the lifting magnet 7 and the push rod 6 at the articulation points 51, 61 in the engagement area 60 of the pivoting lever 5 with the push rod 6 couples.
  • the push rod 6 is connected to a bell crank 9 which is mounted on an axis.
  • the deflection lever 9 is articulated to a pair of tabs 11, and this in turn to the changer segment 12, which is seated on the axis 13. In the position of the multi-link mechanism 4 shown in FIG. 1, the changer segment is in the upper position, the thread transmitter 20b being in the entry position.
  • a clip 21b of the thread feeder 20b is opened and a weft thread 3b is clamped by the insertion element, a projectile, and is inserted into the weaving machine.
  • a sensor 14 is through the changer segment 12 damped when it is in the upper or in the sensor 14 in the lower position. The sensor 14 is used to monitor whether the changer segment 12 is in the correct position. If this is not the case, the control of the weaving machine, bypassing the control program for the lifting magnet 7, would cause the lifting magnet 7 to execute a switching movement of the plunger 71, so that the position of the changer segment 12 is corrected during the subsequent reciprocating movement of the pivoting lever 5.
  • Fig. 2 the push rod 6 is shown in the extended position in one position during the changing process.
  • the plunger 71 is extended from the solenoid 7, the locking element 8 is disengaged from the bore 66 of the push rod 6, the push rod 6 in the position 6 ⁇ is set in motion by the driver 51 of the pivot lever 5.
  • the plunger 71 pulls back into the solenoid 7, the push rod 6 being moved by the shoulder 73 into the rest position 6', the locking element 8 again resting in the bore 66.
  • the shoulder 73 changes the position of the push rod 6 from the working position to the rest position, the push rod 6 is pressed by the shoulder 74 into the working position.
  • the area of the plunger 71 between the shoulders 73 and 74 serves to roughly guide the push rod, for example during assembly work.
  • a part of the multi-link transmission 4 is again shown during the changing process.
  • Projectile 2 is in the process of changing 3 straight between the two thread feeders 20a and 20b.
  • the lifting magnet 7 is only actuated if a change in position of the changer segment 12 is provided.
  • the program for the control of the weaving machine therefore provides that in the event of malfunctions, for example in the event of weft or warp thread breakage, impulse transmission to the lifting magnet 17 is suppressed. Even if the weaving machine is in crawl mode, there must be no coupling between the pivot lever 5 and the push rod 6, since otherwise the pair of tabs 11 could not overcome the stretched position shown in FIG would have.

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

Abstract

In einer Schussfadenwechselvorrichtung (1) einer Webmaschine werden Schussfäden (3a,3b) wahlweise einem Eintragsorgan vorgelegt, wobei die Vorrichtung durch ein Mehrgelenkgetriebe (4) gebildet ist, in welchem ein Antriebsglied (5) mit einem Abtriebsglied (6) durch ein Stellelement (7) nach Programm gekoppelt werden kann. Das Antriebsglied (5) ist ein Schwenkhebel, und das Abtriebsglied (6) ist eine Schubstange, wobei beide Glieder (5,6) in ihrem gemeinsamen Gelenkpunkt (51,61) miteinander gekoppelt werden. Als Stellelement (7) eignet sich ein doppeltwirkender Hubmagnet, der die Schubstange 6 im Bereich eines Langloches (62) beidseitig angreift. Die Vorrichtung zeichnet sich durch ihren einfachen Aufbau, wenige bewegte Glieder und eine exakte Steuerung des Wechselvorganges aus.In a weft thread changing device (1) of a weaving machine, weft threads (3a, 3b) are optionally presented to an entry element, the device being formed by a multi-link mechanism (4) in which a drive element (5) with an output element (6) is provided by an adjusting element (7 ) can be linked according to the program. The drive member (5) is a swivel lever and the output member (6) is a push rod, the two members (5, 6) being coupled to one another at their common pivot point (51, 61). A double-acting lifting magnet, which engages the push rod 6 in the region of an elongated hole (62) on both sides, is suitable as the adjusting element (7). The device is characterized by its simple structure, few moving links and precise control of the changing process.

Description

Die Erfindung betrifft eine Schussfadenwechselvorrichtung, mit der wahlweise verschiedene Schussfäden einem Eintrags­organ vorgelegt werden können, wobei die Vorrichtung durch ein Mehrgelenkgetriebe gebildet wird, in welchem ein An­triebsglied mit einem Abtriebsglied durch ein Stellelement nach Programm gekoppelt werden kann.The invention relates to a weft thread changing device with which different weft threads can optionally be presented to an entry member, the device being formed by a multi-link mechanism in which a drive member can be coupled to an output member by an actuator according to the program.

Eine solche Vorrichtung ist aus der DE-PS 37 16 124 C1 bekannt. Ein Hebelmechanismus wird von einem Kurvenschei­bengetriebe monoton von einer Extremstellung in eine ande­re Extremstellung bewegt, wobei zwischenzeitlich Ruhepau­sen jeweils während eines Arbeitszyklus eingehalten wer­den. Während dieser Ruhepausen ist ein starres Verbinden zwischen An- und Abtriebsglied dadurch möglich, dass ein Elektromagnet einen Mitnahmestift in eine Nut einfährt, wobei die Nut auf einem Antriebsglied für einen Fadenzu­bringer liegt. Die für den Wechselvorgang nötigen Elektro­magnete sitzen auf den Uebertragungsgliedern und müssen ständig mitbewegt werden. Sie erhöhen die Gesamtmasse des auch ohnedies schon überladenen ständig in Bewegung be­findlichen Mehrgelenkgetriebes.Such a device is known from DE-PS 37 16 124 C1. A cam mechanism is monotonously moved from one extreme position to another extreme position by a cam mechanism, in the meantime rest periods are maintained during a work cycle. During these rest periods, a rigid connection between the input and output member is possible in that an electromagnet moves a driving pin into a groove, the groove lying on a drive member for a thread feeder. The electromagnets required for the exchange process sit on the transmission elements and must be moved continuously. They increase the total mass of the multi-link transmission, which is already overloaded anyway and is constantly in motion.

Es ist Aufgabe der vorliegenden Erfindung, eine Schuss­fadenwechselvorrichtung zu schaffen, bei der die Anzahl der ständig bewegten Glieder möglichst klein gehalten wird, wobei die ganze Vorrichtung möglichst einfach und massenarm gehalten wird und keine zusätzlichen bewegten Teile zum Einleiten des Wechselvorganges nötig sind.It is an object of the present invention to provide a weft changing device in which the number of constantly moving links is kept as small as possible, the entire device being kept as simple and low in mass as possible and no additional moving parts being necessary to initiate the changing process.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass das Antriebsglied durch einen Schwenkhebel und das Ab­triebsgleid durch eine Schubstange gebildet werden, und dass die Schubstange durch das Stellelement quer zu seiner Schubrichtung bewegbar ist, wobei ein Gelenkpunkt der Schubstange wahlweise direkt mit einem zugehöringen Ge­lenkpunkt eines Schwenkhebels in Verbindung bzw. ausser Eingriff von diesem bewegbar ist. Bei Verbindung beider Gelenkpunkte ist die Schubstange in Arbeitsstellung, an­sonsten in Ruhestellung. In einer bevorzugten Ausführungs­form weist die Schubstange eine Bohrung auf, welche den Gelenkpunkt der Schubstange darstellt, und der Schwenkhe­bel weist einen der Bohrung angepassten Mitnehmer als Ge­lenkpunkt auf, wobei der Mitnehmer für den Schussfaden­wechselvorgang mit der Bohrung im Eingriff ist. Das Stell­element kann durch einen Hubmagneten gebildet werden mit einem Stössel, der die Querverschiebung der Schubstange programmgemäss bewirkt. Die Schubstange kann eine zweite Bohrung aufweisen, in welche ein ortsfestes Arretierele­ment eingreift, wenn die Schubstange durch das Stellglied in die Ruhestellung gesteuert ist. Der Stössel des Hubma­gneten kann zwei Schultern aufweisen, mit welchen die Schubstange im Bereich des Langloches mit dem Stössel be­aufschlagbar ist. Es ist vorteilhaft, die Schubstange in einem Langloch auf dem Stössel zu führen. Die Bohrung in der Schugstange ist bevorzugt kreisrund, und der Mitnehmer des Schwenkhebels ist ein kreisrunder zur Bohrung passen­der Bolzen.This object is achieved according to the invention in that the drive member is formed by a pivot lever and the output slide by a push rod, and that the push rod can be moved transversely to its pushing direction by the actuating element, a pivot point of the push rod optionally having a corresponding pivot point of a pivot lever in Connection or out of engagement of this is movable. When connecting both pivot points, the push rod is in the working position, otherwise in the rest position. In a preferred embodiment, the push rod has a bore which represents the pivot point of the push rod, and the pivot lever has a driver adapted to the bore as a pivot point, the driver being in engagement with the bore for the weft thread changing process. The actuating element can be formed by a solenoid with a plunger which, according to the program, causes the transverse displacement of the push rod. The push rod can have a second bore, into which a stationary locking element engages when the push rod is controlled into the rest position by the actuator. The plunger of the lifting magnet can have two shoulders with which the plunger can be acted upon by the plunger in the region of the elongated hole. It is advantageous to guide the push rod in an elongated hole on the ram. The hole in the push rod is preferably circular, and the driver the swivel lever is a circular bolt that fits the hole.

Durch die Vorrichtung gemäss der Erfindung wird das Mehr­gelenkgetriebe mit Ausnahme des antreibenden Schwenkhebels lediglich während des Wechselvorganges bewegt. Dadurch treten in den Gelenkpunkten des Mehrgelenkgetriebes keine bzw. nur sehr geringe Abnutzungen auf. Die Schubstange kann durch den Hubmagnet sehr exakt mit dem Schwenkhebel gekoppelt bzw. von diesem entkoppelt werden. Die Vorrich­tung gemäss der Erfindung zeichnet sich durch ihren einfa­chen Aufbau, die wenigen bewegten Glieder und exakte Steuerung beim Wechselvorgang aus. Da der Hubmagnet orts­fest ist, stellen sich keine Probleme bezüglich seiner Unterbringung und der elektrischen Anschlüsse.With the device according to the invention, the multi-link mechanism, with the exception of the driving pivot lever, is only moved during the changing process. As a result, there is little or no wear at the pivot points of the multi-link transmission. The push rod can be very precisely coupled to or decoupled from the swivel lever by the lifting magnet. The device according to the invention is characterized by its simple structure, the few moving links and precise control during the changing process. Since the solenoid is stationary, there are no problems with its placement and electrical connections.

Im folgenden wird die Erfindung anhand der Zeichnungen näher beschrieben. Es zeigen:

  • Fig. 1 eine perspektivische Uebersicht über eine Schuss­fadenwechselvorrichtung gemäss der Erfindung;
  • Fig. 2 einen Grundriss der Schubstange mit den umlie­genden Teilen;
  • Fig. 3 eine perspektivische Teilansicht der Schussfaden­wechselvorrichtung in einer Zwischenposition während des Wechselvorganges und
  • Fig. 4 eine Darstellung ähnlich wie Fig. 1, jedoch mit geänderter Stellung des Wechslersegments.
The invention is described in more detail below with reference to the drawings. Show it:
  • 1 shows a perspective overview of a weft thread changing device according to the invention;
  • Figure 2 is a plan view of the push rod with the surrounding parts.
  • Fig. 3 is a partial perspective view of the weft thread changing device in an intermediate position during the changing process and
  • Fig. 4 is a representation similar to Fig. 1, but with a changed position of the changer segment.

Die Schussfadenwechselvorrichtung 1 wird durch einen Schwenkhebel 5 angetrieben, der beispielsweise mit einem Kurvenscheibengetriebe in Verbindung steht. Der Schwenkhe­bel 5 gelangt dabei in eine vordere ausgezogene und hinte­re strichpunktierte Lage, wobei er jeweils während eines Wechselvorganges von der vorderen Lage in die hintere und wieder zurück in die vordere Lage schwingt. Anschliessend wird der Schwenkhebel 5 für die übrige Zeit des Webzyklus stillgesetzt. Während dieser Zeit kann das Stellelement 7, welches zweckmässig als Hubmagnet ausgeführt wird, die Zuglasche 6 bei den Gelenkpunkten 51 bzw. 61 des Schwenk­hebels bzw. der Schubstange ausser Eingriff bringen, indem ein Stössel 71, der die Schultern 73 und 74 trägt und da­zwischen in einem Langloch 62 die Schubstange 6 führt, die Schubstange 6 bei der Bohrung 60 vom Mitnehmer 51 des Schwenkhebels abziehen. Dabei wird der Stössel 71 vom Stellelement bzw. Hubmagnet 7 angezogen. Eine zweite Boh­rung 66 wird dabei über ein Arretierelement 8 in Form ei­nes Stifts gebracht, so dass das gesamte Mehrgelenkgetrie­be blockiert ist. Der Hubmagnet 7 wird erregt, wenn von der Steuerung der Webmaschine ein Impuls für eine Stel­lungsänderung kommt, worauf der Stössel 71 wieder aus dem Hubmagnet 7 ausgefahren wird und die Schubstange 6 bei den Gelenkpunkten 51, 61 im Eingriffsbereich 60 des Schwenkhe­bels 5 mit der Schubstange 6 kuppelt. Die Schubstange 6 ist mit einem Umlenkhebel 9 verbunden, der auf einer Achse gelagert ist. Auf der anderen Seite der Schubstange 6 ist der Umlenkhebel 9 mit einem Laschenpaar 11 gelenkig verbunden, und dieses wiederum mit dem Wechslersegment 12, das auf der Achse 13 sitzt. In der in Fig. 1 gezeigten Stellung des Mehrgelenkgetriebes 4 ist das Wechslersegment in der oberen Stellung, wobei der Fadengeber 20b in Ein­tragsstellung steht. Eine Klammer 21b des Fadengebers 20b ist geöffnet und ein Schussfaden 3b wird vom Eintragsor­gan, einem Projektil, festgeklemmt und in die Webmaschine eingetragen. Ein Sensor 14 wird durch das Wechslersegment 12 bedämpft, wenn es in der oberen bzw. beim Sensor 14 in der unteren Position liegt. Der Sensor 14 dient zur Ueber­wachung, ob das Wechslersegment 12 in der richtigen Posi­tion steht. Sollte dies nicht der Fall sein, würde die Steuerung der Webmaschine unter Umgehung des Steuerpro­grammes für den Hubmagnet 7 diesen eine Schaltbewegung des Stössels 71 ausführen lassen, damit bei der folgenden Hin­und Herbewegung des Schwenkhebels 5 die Stellung des Wechslersegments 12 korrigiert wird.The weft thread changing device 1 is driven by a swivel lever 5 which, for example, with a Cam gear is connected. The pivot lever 5 comes into a front extended and rear dash-dotted position, whereby it swings from the front position to the rear position and back to the front position during a change process. The pivot lever 5 is then stopped for the rest of the weaving cycle. During this time, the actuating element 7, which is expediently designed as a lifting magnet, can disengage the pull tab 6 at the articulation points 51 and 61 of the pivoting lever and the push rod, respectively, by means of a plunger 71 which carries the shoulders 73 and 74 and in between an elongated hole 62 leads the push rod 6, pull the push rod 6 in the bore 60 from the driver 51 of the pivot lever. The plunger 71 is attracted to the actuating element or solenoid 7. A second bore 66 is made through a locking element 8 in the form of a pin, so that the entire multi-link mechanism is blocked. The lifting magnet 7 is excited when the control of the weaving machine gives an impulse for a change of position, whereupon the plunger 71 is again moved out of the lifting magnet 7 and the push rod 6 at the articulation points 51, 61 in the engagement area 60 of the pivoting lever 5 with the push rod 6 couples. The push rod 6 is connected to a bell crank 9 which is mounted on an axis. On the other side of the push rod 6, the deflection lever 9 is articulated to a pair of tabs 11, and this in turn to the changer segment 12, which is seated on the axis 13. In the position of the multi-link mechanism 4 shown in FIG. 1, the changer segment is in the upper position, the thread transmitter 20b being in the entry position. A clip 21b of the thread feeder 20b is opened and a weft thread 3b is clamped by the insertion element, a projectile, and is inserted into the weaving machine. A sensor 14 is through the changer segment 12 damped when it is in the upper or in the sensor 14 in the lower position. The sensor 14 is used to monitor whether the changer segment 12 is in the correct position. If this is not the case, the control of the weaving machine, bypassing the control program for the lifting magnet 7, would cause the lifting magnet 7 to execute a switching movement of the plunger 71, so that the position of the changer segment 12 is corrected during the subsequent reciprocating movement of the pivoting lever 5.

In Fig. 2 ist die Schubstange 6 in der ausgezogenen Posi­tion in einer Stellung während des Wechselvorganges darge­stellt. Der Stössel 71 ist aus dem Hubmagnet 7 ausgefah­ren, das Arretierelement 8 ist ausser Eingriff von der Bohrung 66 der Schubstange 6, die Schubstange 6 in der Position 6˝ ist vom Mitnehmer 51 des Schwenkhebels 5 in Bewegung versetzt. Nach Beendigung des Schwenkhebels 5 in der Stellung 5′ zieht sich der Stössel 71 wieder in den Hubmagnet 7 zurück, wobei die Schubstange 6 durch die Schulter 73 in die Ruheposition 6′ bewegt wird, wobei das Arretierelement 8 wieder in der Bohrung 66 ruht. Während die Schulter 73 die Stellungsänderung der Schubstange 6 aus der Arbeitsstellung in die Ruhestellung vollzieht, wird die Schubstange 6 durch die Schulter 74 jeweils in die Arbeitsposition gedrückt. Der Bereich des Stössels 71 zwischen den Schultern 73 und 74 dient zur groben Führung der Schubstange beispielsweise bei Montagearbeiten.In Fig. 2 the push rod 6 is shown in the extended position in one position during the changing process. The plunger 71 is extended from the solenoid 7, the locking element 8 is disengaged from the bore 66 of the push rod 6, the push rod 6 in the position 6˝ is set in motion by the driver 51 of the pivot lever 5. After completion of the pivot lever 5 in the position 5 ', the plunger 71 pulls back into the solenoid 7, the push rod 6 being moved by the shoulder 73 into the rest position 6', the locking element 8 again resting in the bore 66. While the shoulder 73 changes the position of the push rod 6 from the working position to the rest position, the push rod 6 is pressed by the shoulder 74 into the working position. The area of the plunger 71 between the shoulders 73 and 74 serves to roughly guide the push rod, for example during assembly work.

In Fig. 3 wird ein Teil des Mehrgelenkgetriebes 4 wiederum während des Wechselvorganges gezeigt. Die Lasche 11, paar­weise zwischen Umlenkhebel 9 und Wechslersegment 12, liegt gestreckt in der Verlängerung des Wechslersegmentes. Das Projektil 2 befindet sich während des Wechselvorganges gemäss Fig. 3 gerade zwischen den beiden Fadengebern 20a und 20b.In Fig. 3, a part of the multi-link transmission 4 is again shown during the changing process. The tab 11, in pairs between the lever 9 and the changer segment 12, lies stretched in the extension of the changer segment. Projectile 2 is in the process of changing 3 straight between the two thread feeders 20a and 20b.

Fig. 4 zeigt schliesslich den Abschluss des Wechselvorgan­ges von Schussfaden 3b zur Schussfaden 3a. Der Schwenkhe­bel 5 ist in Richtung des Pfeils bei 51 wieder in seine Ruheposition gelangt, der Umlenkhebel 9 wurde im Uhrzei­gersinn so verschwenkt, dass das Laschenpaar 11 wieder in der senkrechten Position ist, in der es das Wechslerseg­ment 12 nach unten gedrückt hält. Auf diese Weise konnte der Schussfaden 3a dem Projektil 2 übergeben werden. Der Schussfaden 3a ist von der geöffneten Fadenklammer 21a freigegeben worden. Der Sensor 14 wird in dieser Position nicht bedämpft. Vor Einleitung des nächsten Arbeitshubes durch den Schwenkhebel 5 ist die Schubstange 6 durch den Hubmagnet 7 aus der strichpunktierten Lage 6˝ in die aus­gezogene Lage 6 verschoben worden.4 finally shows the completion of the change process from weft 3b to weft 3a. The pivot lever 5 has returned to its rest position in the direction of the arrow at 51, the deflection lever 9 has been pivoted clockwise so that the pair of tabs 11 is again in the vertical position in which it holds the changer segment 12 down. In this way, weft 3a could be transferred to projectile 2. The weft thread 3a has been released from the opened thread clip 21a. The sensor 14 is not damped in this position. Before initiation of the next working stroke by the swivel lever 5, the push rod 6 has been moved by the lifting magnet 7 from the dot-dash position 6 'into the extended position 6.

Wie bei der Erläuterung der Fig. 1 erwähnt worden ist, wird der Hubmagnet 7 nur betätigt, wenn eine Stellungsän­derung des Wechslersegments 12 vorgesehen ist. Das Pro­gramm für die Steuerung der Webmaschine sieht daher vor, dass bei Störfällen, beispielsweise bei Schussfaden- oder Kettfadenbruch, eine Impulsübermittlung an den Hubmagnet 17 unterdrückt wird. Auch wenn die Webmaschine sich im Kriechbetrieb befindet, muss eine Koppelung zwischen Schwenkhebel 5 und Schubstange 6 unterbleiben, da sonst das Laschenpaar 11 die in Fig. 3 dargestellte Strecklage nicht überwinden könnte, was ein Erliegen der Mischwech­selfunktion und möglicherweise gar eine Beschädigung der Schussfadenwechselvorrichtung zur Folge hätte.As was mentioned in the explanation of FIG. 1, the lifting magnet 7 is only actuated if a change in position of the changer segment 12 is provided. The program for the control of the weaving machine therefore provides that in the event of malfunctions, for example in the event of weft or warp thread breakage, impulse transmission to the lifting magnet 17 is suppressed. Even if the weaving machine is in crawl mode, there must be no coupling between the pivot lever 5 and the push rod 6, since otherwise the pair of tabs 11 could not overcome the stretched position shown in FIG would have.

Claims (8)

1. Schussfadenwechselvorrichtung, mit der wahlweise verschiedene Schussfäden einem Eintragsorgan vorgelegt werden können, wobei die Vorrichtung durch ein Mehrge­lenkgetriebe gebildet wird, in welchem ein Antriebs­glied mit einem Abtriebsglied durch ein Stellelement nach Programm gekoppelt werden kann, dadurch ge­kennzeichnet, dass das Antriebsglied durch einen Schwenkhebel (5) und das Abtriebsglied durch eine Schubstange (6) gebildet werden, und dass die Schub­stange (6) durch das Stellelement (7) quer zu seiner Schubrichtung bewegbar ist, wobei ein Gelenkpunkt (61) der Schubstange (6) wahlweise direkt mit einem zugehö­rigen Gelenkpunkt (51) des Schwenkhebels (5) in Verbin­dung bzw. ausser Eingriff von diesem bewegbar ist.1.Weft thread changing device with which different weft threads can optionally be presented to an entry member, the device being formed by a multi-link mechanism in which a drive element can be coupled to an output element by an actuating element according to the program, characterized in that the drive element by a swivel lever ( 5) and the driven member are formed by a push rod (6), and that the push rod (6) can be moved transversely to its pushing direction by the adjusting element (7), a pivot point (61) of the push rod (6) optionally being directly connected to an associated one The articulation point (51) of the swivel lever (5) can be moved in connection or out of engagement therewith. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Schubstange (6) eine Bohrung (61) aufweist, welche den Gelenkpunkt der Schubstange darstellt, und dass der Schwenkhebel (5) einen der Bohrung (61) ange­passten Mitnehmer (51) als Gelenkpunkt aufweist, wobei der Mitnehmer (51) für den Schussfadenwechselvorgang mit der Bohrung (61) im Eingriff ist.2. Device according to claim 1, characterized in that the push rod (6) has a bore (61) which represents the hinge point of the push rod, and that the pivot lever (5) has a driver (51) adapted to the bore (61) as the hinge point The driver (51) engages with the bore (61) for the weft change process. 3. Vorrichtung nach Anspruch 1 und 2, dadurch gekennzeich­net, dass das Stellelement (7) durch einen Hubmagneten gebildet wird, wobei im Hubmagneten (7) ein Stössel (71) sitzt, der mit der Schubstange zur Durchführung der Querverschiebung gemäss Steuerprogramm verbunden ist, wobei der Stössel (71) die Schubstange (6) in einem Langloch (62) durchgreift.3. Device according to claim 1 and 2, characterized in that the actuating element (7) is formed by a lifting magnet, a plunger (71) sitting in the lifting magnet (7), which is connected to the push rod for carrying out the transverse displacement according to the control program, wherein the plunger (71) passes through the push rod (6) in an elongated hole (62). 4. Vorrichtung nach Anspruch 1 bis 3, dadurch gekennzeich­net, dass die Schubstange (6) eine zweite Bohrung (65) aufweist, das einem ortsfesten Arretierelement (8) zu­geordnet ist, wobei Bohrung (65) und Arretierelement (8) in der Ruhestellung der Schubstange miteinander fluchten.4. The device according to claim 1 to 3, characterized in that the push rod (6) has a second bore (65) which is associated with a fixed locking element (8), wherein the bore (65) and locking element (8) in the rest position of the Align the push rod with each other. 5. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Stössel (71) des Hubmagneten (7) zwei Schul­tern (73,74) aufweist, welche seitlich an der Schub­stange (6) im Bereich des Langloches (62) anliegen.5. The device according to claim 3, characterized in that the plunger (71) of the lifting magnet (7) has two shoulders (73, 74) which lie laterally on the push rod (6) in the region of the elongated hole (62). 6. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Schubstange (6) mittels des Langloches (62) auf dem Stössel (71) zwischen den Schultern (73,74) geführt ist.6. The device according to claim 3, characterized in that the push rod (6) is guided by means of the elongated hole (62) on the plunger (71) between the shoulders (73, 74). 7. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Bohrung (61) der Schubstange (6) kreisrund ist, und dass der Mitnehmer (51) des Schwenkhebels (5) ein kreisrunder zur Bohrung passender Bolzen ist.7. The device according to claim 2, characterized in that the bore (61) of the push rod (6) is circular, and that the driver (51) of the pivot lever (5) is a circular bolt matching the bore. 8. Webmaschine mit Schussfadenwechselvorrichtung nach den Ansprüchen 1 bis 7.8. loom with weft changing device according to claims 1 to 7.
EP90810469A 1989-07-21 1990-06-22 Weft changing device for a loom Expired - Lifetime EP0409773B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH273789 1989-07-21
CH2737/89 1989-07-21

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EP0409773A1 true EP0409773A1 (en) 1991-01-23
EP0409773B1 EP0409773B1 (en) 1994-04-20

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EP90810469A Expired - Lifetime EP0409773B1 (en) 1989-07-21 1990-06-22 Weft changing device for a loom

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EP (1) EP0409773B1 (en)
DE (1) DE59005415D1 (en)
RU (1) RU1804509C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515308A1 (en) * 1991-05-23 1992-11-25 Gebrüder Sulzer Aktiengesellschaft Weft shifter in a projectile weaving machine
EP0515309A1 (en) * 1991-05-23 1992-11-25 Gebrüder Sulzer Aktiengesellschaft Weft changing device for dummy shuttle looms

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2041419A (en) * 1979-02-09 1980-09-10 Somet Soc Mec Tessile Weft presenting device for weaving looms
GB2106548A (en) * 1981-09-04 1983-04-13 Centralen Savet Pri N Tech Weft patterning devices, shuttleless looms
GB2124663A (en) * 1982-07-19 1984-02-22 Somet Soc Mec Tessile Weft selection and presenting device for weaving looms
DE3716124C1 (en) * 1987-05-14 1988-07-21 Picanol Nv Weft thread changing device on weaving machines for the optional movement of master fingers
EP0293558A1 (en) * 1987-04-03 1988-12-07 GebràœDer Sulzer Aktiengesellschaft Weft thread selection device for a loom

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8600858A (en) * 1986-04-03 1987-11-02 Picanol Nv DRIVE AND STEERING MECHANISM FOR CLAMPING, PRESENTING AND HOLDING WAVES AT GRAPER WEAVING MACHINES.
EP0340162B1 (en) * 1988-04-25 1992-08-12 GebràœDer Sulzer Aktiengesellschaft Loom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2041419A (en) * 1979-02-09 1980-09-10 Somet Soc Mec Tessile Weft presenting device for weaving looms
GB2106548A (en) * 1981-09-04 1983-04-13 Centralen Savet Pri N Tech Weft patterning devices, shuttleless looms
GB2124663A (en) * 1982-07-19 1984-02-22 Somet Soc Mec Tessile Weft selection and presenting device for weaving looms
EP0293558A1 (en) * 1987-04-03 1988-12-07 GebràœDer Sulzer Aktiengesellschaft Weft thread selection device for a loom
DE3716124C1 (en) * 1987-05-14 1988-07-21 Picanol Nv Weft thread changing device on weaving machines for the optional movement of master fingers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515308A1 (en) * 1991-05-23 1992-11-25 Gebrüder Sulzer Aktiengesellschaft Weft shifter in a projectile weaving machine
EP0515309A1 (en) * 1991-05-23 1992-11-25 Gebrüder Sulzer Aktiengesellschaft Weft changing device for dummy shuttle looms
US5186218A (en) * 1991-05-23 1993-02-16 Sulzer Brothers Limited Gripper changer for projectile looms
US5209272A (en) * 1991-05-23 1993-05-11 Sulzer Brothers Limited Gripper changer for projectile looms

Also Published As

Publication number Publication date
RU1804509C (en) 1993-03-23
EP0409773B1 (en) 1994-04-20
DE59005415D1 (en) 1994-05-26
US5031671A (en) 1991-07-16

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