EP0246182A1 - Weft-storing device for looms - Google Patents

Weft-storing device for looms Download PDF

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Publication number
EP0246182A1
EP0246182A1 EP87810155A EP87810155A EP0246182A1 EP 0246182 A1 EP0246182 A1 EP 0246182A1 EP 87810155 A EP87810155 A EP 87810155A EP 87810155 A EP87810155 A EP 87810155A EP 0246182 A1 EP0246182 A1 EP 0246182A1
Authority
EP
European Patent Office
Prior art keywords
braking
drum
weft
weft thread
circumference
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
EP87810155A
Other languages
German (de)
French (fr)
Other versions
EP0246182B1 (en
Inventor
Rolf Benz
John Dalton Griffith
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.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
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Filing date
Publication date
Application filed by Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0246182A1 publication Critical patent/EP0246182A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/364—Yarn braking means acting on the drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • 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
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/364—Yarn braking means acting on the drum
    • D03D47/366—Conical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/13—Actuating means linear magnetic, e.g. induction motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/20—Actuating means angular
    • B65H2555/23—Actuating means angular magnetic, e.g. rotary solenoids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a weft store for weaving machines, to which thread is fed from a supply spool and from which thread is drawn discontinuously for entry into the shed of a weaving machine, with a drum for storing a supply of weft threads and with a braking device consisting of a rotationally symmetrical braking surface, at least an elastically deformable braking member adjustable against the braking surface and an adjusting device for the braking member relative to the braking surface.
  • the German design specification 22 53 259 describes such a braking device on a weft thread store, which is formed from a ring with an elastic insert that is axially adjustable against the drum of the weft thread store.
  • the brake disc is moved against the drum by an angle lever via a cam drive, the. Kinetic energy of the disk is destroyed when it hits the drum circumference. The resulting impact is mitigated by the elastic insert, but the weft thread between the drum circumference and the brake disc is pinched gently. Misalignment between the axes of the drum and the The brake disc can be compensated for by the elastic insert, but surface pressures of different strengths occur in the contact zone, as a result of which the weft thread is braked to different extents depending on the position on the circumference of the drum. This allows the weft thread lengths to vary from one weft to another.
  • the invention which achieves the above object, is characterized in that the adjusting device is directly connected to the parts of the braking member which are low-mass and adhere to the circumference of the braking surface.
  • the braking member can consist of a plurality of rod-like disks lying next to one another on the outer drum circumference, which are pressed against the drum circumference, for example, by the action of a magnetic field.
  • the slats can be articulated or rigidly attached to a ring surrounding the drum at one end and lie against the drum circumference under the action of magnetic forces, the weft thread being trapped between the slats and the drum and being delayed to a standstill.
  • the disk-like braking elements can also be integrated into the circumference of the drum.
  • the braking element can also be formed by a single wire loop enclosing the drum circumference, which is contracted when the braking process is initiated, whereby it rests on the entire drum circumference.
  • the braking elements As far as the braking elements can come into contact with the drum circumference, they are designed to be flexible so that they lie evenly firmly on the drum circumference.
  • the effect of the braking device can be finely dosed by the described embodiments, so that the weft thread can be braked gently at the end of the weft insertion.
  • the weft thread store 1 is supplied with the weft thread 21 from the thread spool 2 through a bore in the winder axis 11 and the winding arm 111. It is first placed on the left part of the drum 10 in several loops and then by a second winding arm 112 on the right part of the drum 10 in FIG. 1 wraps.
  • the braking device 13 surrounds the thread take-off end of the drum 10 with an annular magnet 131 and low-mass braking members 132, which are arranged on the circumference of the drum on the annular magnet 131 and, when the magnet is excited, with their ends facing the axis of the drum on the right-hand conical drum circumference, the braking surface 103.
  • the thread 21 is clamped between the braking surface 103 and the braking members 132 and decelerated to a standstill.
  • the drum 10 is supported by a bearing 12 in the winder axis 11 and secured against rotation by known means, not shown.
  • the winder axis 11 is driven via the drive belt 31 by a controllable drive motor 3, which is connected to the controller 4 via a control line 45.
  • the motor speed is set at the beginning of the weaving process to a value corresponding to the selected speed of the machine and the width of the fabric 6. If the thread length delivered by the winder arm 111 or 112 per work cycle of the weaving machine is as large as the thread length required per weft, the winding condition of the drum 10 will not change from one weft to the other. If too little thread supply is supplied from the winder arms 111 and 112, this is reported by a thread supply sensor 84 to the control 4 via a control line 48, whereupon the speed of the winder axis 11 is increased.
  • the length of the weft thread inserted by means of the main nozzle 5 is determined by the time interval between the opening of the braking device 13 and the subsequent closing.
  • the time at which the braking device 13 is opened and closed is coordinated with the respective state of the weaving machine via an angle disk 71 on the main shaft of the weaving machine 7, the angle sensor 85, the control line 47 and the controller 4. While the release of the braking device and thus the release of the weft can be determined at a certain position of the angle disk 71 relative to the angle sensor 85, the time of the closing process of the braking device depends on whether the weft thread tip 22 gets more or less far into the monitoring path along the weft thread monitoring 8.
  • the opening interval of the braking device can be extended somewhat for the following weft, so that the weft thread does not become too short on the loom side. Conversely, the opening interval of the braking device 13 is shortened if the weft thread tip comes to a standstill close to the sensor 83.
  • the control processes described are controlled by the controller 4, which is connected to the thread sensors 81-83 by means of the control lines 41-43 and to the magnet 131 by the control line 46.
  • Fig. 2 shows on an enlarged scale compared to Fig. 1 schematically the structure of the braking device 13.
  • the magnet 131 is arranged in the form of a ring. It carries the brake members 132 articulated at 133, which are arranged close to one another on the entire circumference of the ring. They are in the position 132 'during the opening time of the braking device 13 and thus leave a space between the braking surface 103 and through which the weft thread 21 through the eyelet 14 in the direction of the Main nozzle 5 can run.
  • the magnet 131 When the magnet 131 is energized, the parts of the braking members 132 close to it are pulled towards it, whereby the braking process is initiated.
  • the braking members 132 Due to the low-mass design of the braking members 132 inertial forces of the moving parts remain largely switched off during the braking process, so that the braking force can be finely regulated with the current in the control line 46. The braking force can thus be matched to the weft yarn to be entered.
  • FIG. 3 shows an embodiment of the braking device 13, in which the braking members 132 are integrated in the drum circumference and can be pulled against the magnetic ring 131 surrounding them, as a result of which the space for thread passage is reduced.
  • the braking members 132 are oriented obliquely to the surface lines of the drum 10 so that the weft thread, which takes a curve according to the dash-dotted position 21 ′ against the drum circumference during the running, cannot get caught in the spaces between the braking members 132.
  • the right-hand end of the drum 10 here forms a disk 102, around the edge of which the weft thread is deflected in the direction of the eyelet 14. When braking, the braking members move from position 132 'to position 132.
  • the braking member 132 being formed by a wire loop. As shown in FIG. 4, it can surround the circumference of the drum 10 in several turns.
  • the ends of the braking member 132 can be provided with magnet armatures 135, which in each case in an armature guide 136 by a magnet 131 from the dot-dash position to the extended position in FIG.
  • Fig. 5 can be moved. If the magnetic force ceases to exist, the magnet armatures 135 can be retracted into the dashed position due to the elasticity of the braking member 132. The magnet armatures 135 move parallel to the arrows 137.
  • guide rings 134 can be arranged which guide the wire loop 132 in the radial and axial directions. While a simple arrangement of a braking element 132 in the form of a wrap spring is shown in FIG. 7a, a double arrangement can be seen in FIG. 7b. The same applies to the effect of this embodiment with regard to a gentle and controlled braking process for the weft thread as described above for other embodiments of the braking device.

Abstract

In einem Schussfadenspeicher für Webmaschinen mit stillstehender Trommel (10) zur Speicherung eines Schussfadenvorrats (23) und mit einer Bremsvorrichtung (13) am Ende der Trommel ist ein elastisch verformbares Bremsorgan (132) gegen eine Bremsfläche an der Trommel mittels einer Verstellvorrichtung (131) verschiebbar angeordnet. Die Vorrichtung z.B. ein ringförmiger Eiektromagnet (131), ist direkt mit massenarmen Teilen des Bremsorgans (132) wirkungsverbunden. Diese Teile können aus stabartigen nebeneinander am äusseren Trommelumfang (10) liegenden Lamellen bestehen. Dadurch kann die Wirkung der Bremsvorrichtung auf den ablaufenden Schussfaden genau eingestellt werden, so dass ein schonendes Abbremsen des Schussfadens am Ende des Schusseintrags in eine Webmaschine möglich ist.An elastically deformable braking element (132) can be displaced against a braking surface on the drum by means of an adjusting device (131) in a weft thread store for weaving machines with a stationary drum (10) for storing a weft thread supply (23) and with a braking device (13) at the end of the drum arranged. The device e.g. a ring-shaped electromagnet (131) is directly connected to the low-mass parts of the braking member (132). These parts can consist of rod-like slats lying side by side on the outer circumference of the drum (10). As a result, the effect of the braking device on the weft thread running off can be set precisely, so that the weft thread can be braked gently at the end of the weft insertion into a weaving machine.

Description

Die Erfindung betrifft einen Schussfadenspeicher für Webmaschinen, dem von einer Vorratsspule Faden zugeführt wird und von dem diskontinuierlich Faden für den Eintrag in das Webfach einer Webmaschine abgezogen wird, mit einer Trommel zur Speicherung eines Schussfadenvorrats und mit einer Bremsvorrichtung, bestehend aus einer rotationssymmetrischen Bremsfläche, wenigstens einem gegen die Bremsfläche verstellbaren elastisch verformbaren Bremsorgan und einer Verstellvorrichtung für das Bremsorgan relativ zur Bremsfläche.The invention relates to a weft store for weaving machines, to which thread is fed from a supply spool and from which thread is drawn discontinuously for entry into the shed of a weaving machine, with a drum for storing a supply of weft threads and with a braking device consisting of a rotationally symmetrical braking surface, at least an elastically deformable braking member adjustable against the braking surface and an adjusting device for the braking member relative to the braking surface.

In der deutschen Auslegeschrift 22 53 259 ist eine derartige Bremsvorrichtung an einem Schussfadenspeicher beschrieben, die aus einem Ring mit einer elastischen Einlage gebildet wird, der axial gegen die Trommel des Schussfadenspeichers verstellbar ist. Die Bremsscheibe wird von einem Winkelhebel über einen Nockentrieb gegen die Trommel verschoben, wobei die. Bewegungsenergie der Scheibe beim Aufschlagen am Trommelumfang vernichtet wird. Der dabei auftretende Stoss wird zwar durch die elastische Einlage gemildert, jedoch wird der Schussfaden zwischen Trommelumfang und Bremsscheibe unsanft eingeklemmt. Fluchtungsfehler zwischen den Achsen der Trommel und der Bremsscheibe können durch die elastische Einlage ausgeglichen werden, wobei aber unterschiedlich starke Flächenpressungen in der Kontaktzone auftreten, wodurch der Schussfaden je nach Stellung am Umfang der Trommel unterschiedlich stark abgebremst wird. Dadurch können von einem Schuss zum anderen die Schussfadenlängen variieren.The German design specification 22 53 259 describes such a braking device on a weft thread store, which is formed from a ring with an elastic insert that is axially adjustable against the drum of the weft thread store. The brake disc is moved against the drum by an angle lever via a cam drive, the. Kinetic energy of the disk is destroyed when it hits the drum circumference. The resulting impact is mitigated by the elastic insert, but the weft thread between the drum circumference and the brake disc is pinched gently. Misalignment between the axes of the drum and the The brake disc can be compensated for by the elastic insert, but surface pressures of different strengths occur in the contact zone, as a result of which the weft thread is braked to different extents depending on the position on the circumference of the drum. This allows the weft thread lengths to vary from one weft to another.

Es ist Aufgabe der vorliegenden Erfindung, einen Schussfadenspeicher zu schaffen, dessen Bremsvorrichtung den Schussfaden mit einer kontrollierbaren Flächenpressung an der Bremsstelle sanft abbremst, wobei an jeder Stelle der Bremse dieselben reproduzierbaren Bedingungen bei jedem Bremsvorgang bestehen.It is an object of the present invention to provide a weft thread store, the braking device of which gently brakes the weft thread with a controllable surface pressure at the braking point, the same reproducible conditions being present at every point of the brake with each braking operation.

Die Erfindung, welche die vorstehende Aufgabe löst, ist dadurch gekennzeichnet, dass die Verstellvorrichtung direkt mit massenarmen sich an den Umfang der Bremsfläche anschmiegenden Teilen des Bremsorgans wirkungsverbunden ist. Das Bremsorgan kann aus einer Mehrzahl stabartiger nebeneinander am äusseren Trommelumfang liegender Lamellen bestehen, die beispielsweise durch die Wirkung eines Magnetfeldes an den Trommelumfang gedrückt werden. Die Lamellen können an einem die Trommel umgebenden Ring an ihrem einen Ende gelenkig oder starr befestigt sein und legen sich unter der Wirkung magnetischer Kräfte an den Trommelumfang an, wobei der Schussfaden beim Ablauf zwischen Lamellen und Trommel eingeklemmt und bis zum Stillstand verzögert werden kann. Die lamellenartigen Bremsorgane können auch in den Umfang der Trommel integriert sein. Beim Bremsvorgang werden sie dann gegen die Innenseite eines die Trommel umgebenden Ringes gedrückt. Das Bremsorgan kann auch durch eine einzige den Trommelumfang umschliessende Drahtschlinge gebildet werden, welche bei der Einleitung des Bremsvorganges zusammengezogen wird, wobei sie auf dem ganzen Trommelumfang aufliegt.The invention, which achieves the above object, is characterized in that the adjusting device is directly connected to the parts of the braking member which are low-mass and adhere to the circumference of the braking surface. The braking member can consist of a plurality of rod-like disks lying next to one another on the outer drum circumference, which are pressed against the drum circumference, for example, by the action of a magnetic field. The slats can be articulated or rigidly attached to a ring surrounding the drum at one end and lie against the drum circumference under the action of magnetic forces, the weft thread being trapped between the slats and the drum and being delayed to a standstill. The disk-like braking elements can also be integrated into the circumference of the drum. When braking, they are then pressed against the inside of a ring surrounding the drum. The braking element can also be formed by a single wire loop enclosing the drum circumference, which is contracted when the braking process is initiated, whereby it rests on the entire drum circumference.

Soweit die Bremsorgane mit dem Trommelumfang in Berührung kommen können, sind sie biegeweich ausgeführt, damit sie am Trommelumfang gleichmässig fest aufliegen.As far as the braking elements can come into contact with the drum circumference, they are designed to be flexible so that they lie evenly firmly on the drum circumference.

Durch die beschriebenen Ausführungsformen kann die Wirkung der Bremsvorrichtung fein dosiert werden, so dass ein schonendes Abbremsen des Schussfadens am Ende des Schusseintrages möglich ist.The effect of the braking device can be finely dosed by the described embodiments, so that the weft thread can be braked gently at the end of the weft insertion.

Im folgenden wird die Erfindung anhand der Figuren im einzelnen beschrieben.

  • Fig. 1 gibt eine Uebersicht über den gesamten Lauf des Schussfadens u.a. durch den Schussfadenspeicher während des Webvorgangs,
  • Fig. 2 und Fig. 3 zeigen zwei Ausführungsarten gemäss der Erfindung in einer Seitenansicht senkrecht zur Trommelachse,
  • Fig. 4 zeigt eine weitere Ausführungsart der Erfindung in der gleichen Ansicht,
  • Fig. 5 stellt einen Querschnitt durch die Anordnung gemäss Fig. 4 nach Linie V - V dar,
  • Fig. 6 ist ein Meridianschnitt durch die Trommel und die Bremsvorrichtung mit einem umgebenden Stützring der Ausführung nach Fig. 4,
  • Fig. 7a und 7b zeigen zwei Ausführungsarten nach Fig. 4 in perspektivischer Darstellung.
The invention is described in detail below with reference to the figures.
  • 1 gives an overview of the entire course of the weft thread, inter alia through the weft thread store during the weaving process,
  • 2 and 3 show two embodiments according to the invention in a side view perpendicular to the drum axis,
  • 4 shows a further embodiment of the invention in the same view,
  • 5 shows a cross section through the arrangement according to FIG. 4 along line V-V,
  • 6 is a meridian section through the drum and the braking device with a surrounding support ring of the embodiment according to FIG. 4,
  • 7a and 7b show two embodiments according to FIG. 4 in a perspective view.

Dem Schussfadenspeicher 1 wird der Schussfaden 21 von der Fadenspule 2 durch eine Bohrung in der Wicklerachse 11 und dem Wickelarm 111 zugeführt. Er wird zunächst auf dem linken Teil der Trommel 10 in mehreren Schlaufen abgelegt und sodann durch einen zweiten Wickelarm 112 auf den rechten Teil der Trommel 10 in Fig. 1 aufgewickelt. Die Bremsvorrichtung 13 umgibt das fadenabzugsseitige Ende der Trommel 10 mit einem ringförmigen Magnet 131 und massenarmen Bremsorganen 132, die am Umfang der Trommel auf dem ringförmigen Magnet 131 angeordnet sind und bei Erregung des Magneten mit ihren der Achse der Trommel zugewandten Enden am rechten konischen Trommelumfang, der Bremsfläche 103, aufliegen. Am Ende des Schusseintrages zwischen die Kettfäden 61 wird der Faden 21 so zwischen der Bremsfläche 103 und den Bremsorganen 132 eingeklemmt und bis zum Stillstand verzögert. Beim gezeigten Ausführungsbeispiel ist die Trommel 10 über eine Lagerung 12 in der Wicklerachse 11 gelagert und durch nicht dargestellte bekannte Mittel gegen Verdrehung gesichert.The weft thread store 1 is supplied with the weft thread 21 from the thread spool 2 through a bore in the winder axis 11 and the winding arm 111. It is first placed on the left part of the drum 10 in several loops and then by a second winding arm 112 on the right part of the drum 10 in FIG. 1 wraps. The braking device 13 surrounds the thread take-off end of the drum 10 with an annular magnet 131 and low-mass braking members 132, which are arranged on the circumference of the drum on the annular magnet 131 and, when the magnet is excited, with their ends facing the axis of the drum on the right-hand conical drum circumference, the braking surface 103. At the end of the weft insertion between the warp threads 61, the thread 21 is clamped between the braking surface 103 and the braking members 132 and decelerated to a standstill. In the embodiment shown, the drum 10 is supported by a bearing 12 in the winder axis 11 and secured against rotation by known means, not shown.

Die Wicklerachse 11 wird über den Antriebsriemen 31 von einem steuerbaren Antriebsmotor 3 angetrieben, der über eine Steuerleitung 45 mit der Steuerung 4 verbunden ist. Die Motordrehzahl wird zu Beginn des Webvorganges auf einen der gewählten Drehzahl der Maschine und der Breite des Gewebes 6 entsprechenden Wert eingestellt. Sofern die vom Wicklerarm 111 bzw. 112 gelieferte Fadenlänge pro Arbeitszyklus der Webmaschine so gross ist wie die pro Schuss benötigte Fadenlänge, wird sich der Bewicklungszustand der Trommel 10 von einem Schuss zum anderen nicht ändern. Falls von den Wicklerarmen 111 und 112 zu wenig Fadenvorrat nachgeliefert wird, wird dies durch einen Fadenvorratssensor 84 über eine Steuerleitung 48 an die Steuerung 4 gemeldet, worauf die Drehzahl der Wicklerachse 11 erhöht wird. Die Länge des mittels der Hauptdüse 5 eingetragenen Schussfadens wird durch den Zeitintervall zwischen Oeffnen der Bremsvorrichtung 13 und nachfolgendem Schliessen bestimmt. Der Zeitpunkt des Oeffnens und Schliessens der Bremsvorrichtung 13 wird über eine Winkelscheibe 71 auf der Hauptwelle der Webmaschine 7, den Winkelsensor 85, die Steuerleitung 47 und die Steuerung 4 mit dem jeweiligen Zustand der Webmaschine koordiniert. Während das Lüften der Bremsvorrichtung und damit die Schussfreigabe bei einer bestimmten Stellung der Winkelscheibe 71 zum Winkelsensor 85 festgelegt werden kann, richtet sich der Zeitpunkt des Schliessvorgangs der Bremsvorrichtung danach, ob die Schussfadenspitze 22 mehr oder weniger weit in die Ueberwachungsstrecke entlang der Schussfadenüberwachung 8 gelangt. Bleibt bei einem Schuss die Schussfadenspitze 22 nahe beim Fadensensor 81 stehen, so kann für die folgenden Schüsse das Oeffnungsintervall der Bremsvorrichtung etwas verlängert werden, damit die Schussfäden fangseitig der Webmaschine nicht zu kurz werden. Umgekehrt wird das Oeffnungsintervall der Bremsvorrichtung 13 verkürzt, wenn die Schussfadenspitze zu nahe beim Sensor 83 zum Stehen kommt. Die beschriebenen Regelungsvorgänge werden durch die Steuerung 4 kontrolliert, welche mit den Fadensensoren 81 - 83 mittels der Steuerleitungen 41 - 43 und mit dem Magnet 131 durch die Steuerleitung 46 verbunden ist.The winder axis 11 is driven via the drive belt 31 by a controllable drive motor 3, which is connected to the controller 4 via a control line 45. The motor speed is set at the beginning of the weaving process to a value corresponding to the selected speed of the machine and the width of the fabric 6. If the thread length delivered by the winder arm 111 or 112 per work cycle of the weaving machine is as large as the thread length required per weft, the winding condition of the drum 10 will not change from one weft to the other. If too little thread supply is supplied from the winder arms 111 and 112, this is reported by a thread supply sensor 84 to the control 4 via a control line 48, whereupon the speed of the winder axis 11 is increased. The length of the weft thread inserted by means of the main nozzle 5 is determined by the time interval between the opening of the braking device 13 and the subsequent closing. The time at which the braking device 13 is opened and closed is coordinated with the respective state of the weaving machine via an angle disk 71 on the main shaft of the weaving machine 7, the angle sensor 85, the control line 47 and the controller 4. While the release of the braking device and thus the release of the weft can be determined at a certain position of the angle disk 71 relative to the angle sensor 85, the time of the closing process of the braking device depends on whether the weft thread tip 22 gets more or less far into the monitoring path along the weft thread monitoring 8. If the weft thread tip 22 remains close to the thread sensor 81 during a weft, the opening interval of the braking device can be extended somewhat for the following weft, so that the weft thread does not become too short on the loom side. Conversely, the opening interval of the braking device 13 is shortened if the weft thread tip comes to a standstill close to the sensor 83. The control processes described are controlled by the controller 4, which is connected to the thread sensors 81-83 by means of the control lines 41-43 and to the magnet 131 by the control line 46.

Fig. 2 zeigt im vergrösserten Massstab gegenüber Fig. l schematisch den Aufbau der Bremsvorrichtung 13. Um die Trommel 10, auf der der Fadenvorrat 23 gespeichert ist, ist der Magnet 131 in Form eines Ringes angeordnet. Er trägt die bei 133 angelenkten Bremsorgane 132, die dicht nebeneinander am ganzen Ringumfang angeordnet sind. Sie befinden sich während der Oeffnungszeit der Bremsvorrichtung 13 in der Stellung 132' und lassen so einen Zwischenraum zwischen der Bremsfläche 103 und sich, durch den der Schussfaden 21 durch die Oese 14 in Richtung auf die Hauptdüse 5 laufen kann. Wenn der Magnet 131 unter Strom gesetzt ist, werden die ihm naheliegenden Teile der Bremsorgane 132 an ihn herangezogen, wodurch der Bremsvorgang eingeleitet ist. Durch die massenarme Ausführung der Bremsorgane 132 bleiben während des Bremsvorganges Trägheitskräfte der bewegten Teile weitgehend ausgeschaltet, womit die Bremskraft mit der Stromstärke in der Steuerleitung 46 fein regulierbar ist. Die Bremskraft kann so auf das einzutragende Schussgarn abgestimmt werden.Fig. 2 shows on an enlarged scale compared to Fig. 1 schematically the structure of the braking device 13. Around the drum 10, on which the thread supply 23 is stored, the magnet 131 is arranged in the form of a ring. It carries the brake members 132 articulated at 133, which are arranged close to one another on the entire circumference of the ring. They are in the position 132 'during the opening time of the braking device 13 and thus leave a space between the braking surface 103 and through which the weft thread 21 through the eyelet 14 in the direction of the Main nozzle 5 can run. When the magnet 131 is energized, the parts of the braking members 132 close to it are pulled towards it, whereby the braking process is initiated. Due to the low-mass design of the braking members 132 inertial forces of the moving parts remain largely switched off during the braking process, so that the braking force can be finely regulated with the current in the control line 46. The braking force can thus be matched to the weft yarn to be entered.

In Fig. 3 ist eine Ausführungsart der Bremsvorrichtung 13 gezeigt, bei der die Bremsorgane 132 in den Trommelumfang integriert sind und gegen den sie umgebenden Magnetring 131 gezogen werden können, wodurch der Zwischenraum für den Fadendurchtritt verkleinert wird. Die Bremsorgane 132 sind schräg zu den Mantellinien der Trommel 10 orientiert, damit der Schussfaden, der während des Ablaufens eine Kurve gemäss strichpunktierter Lage 21' gegen den Trommelumfang einnimmt, sich nicht in den Zwischenräumen zwischen den Bremsorganen 132 verfangen kann. Den rechtsseitigen Abschluss der Trommel 10 bildet hier eine Scheibe 102, um deren Rand der Schussfaden in Richtung auf die Oese 14 umgelenkt wird. Beim Bremsen gehen die Bremsorgane von Stellung 132' in die Stellung 132 über.3 shows an embodiment of the braking device 13, in which the braking members 132 are integrated in the drum circumference and can be pulled against the magnetic ring 131 surrounding them, as a result of which the space for thread passage is reduced. The braking members 132 are oriented obliquely to the surface lines of the drum 10 so that the weft thread, which takes a curve according to the dash-dotted position 21 ′ against the drum circumference during the running, cannot get caught in the spaces between the braking members 132. The right-hand end of the drum 10 here forms a disk 102, around the edge of which the weft thread is deflected in the direction of the eyelet 14. When braking, the braking members move from position 132 'to position 132.

Die Fig. 4 - 7 illustrieren eine weitere Ausführungsart der Bremsvorrichtung gemäss der Erfindung, wobei das Bremsorgan 132 durch eine Drahtschleife gebildet wird. Sie kann wie in Fig. 4 gezeigt in mehreren Windungen den Umfang der Trommel 10 umgeben. Die Enden des Bremsorgans 132 können mit Magnetankern 135 versehen sein, die in jeweils einer Ankerführung 136 durch einen Magnet 131 von der strichpunktierten Lage in die ausgezogene Lage in4-7 illustrate a further embodiment of the braking device according to the invention, the braking member 132 being formed by a wire loop. As shown in FIG. 4, it can surround the circumference of the drum 10 in several turns. The ends of the braking member 132 can be provided with magnet armatures 135, which in each case in an armature guide 136 by a magnet 131 from the dot-dash position to the extended position in FIG

Fig. 5 verschoben werden können. Bei Wegfall der Magnetkraft können die Magnetanker 135 aufgrund der Elastizität des Bremsorgans 132 in die gestrichelte Lage zurückgezogen werden. Die Magnetanker 135 bewegen sich parallel zu den Pfeilen 137. Damit ein konstanter Spalt zwischen der Trommel 10 und dem Bremsorgan 132 eingehalten wird, können Führungsringe 134 angeordnet werden, welche die Drahtschlinge 132 in radialer und axialer Richtung führen. Während in Fig. 7a eine einfache Anordnung eines Bremsorgans 132 in Form einer Schlingfeder gezeigt wird, ist in Fig. 7b eine zweifache Anordnung zu sehen. Für die Wirkung dieser Ausführung bezüglich eines schonenden und kontrollierten Abbremsvorgangs für den Schussfaden gilt dasselbe wie oben für andere Ausführungsformen der Bremsvorrichtung geschildert.Fig. 5 can be moved. If the magnetic force ceases to exist, the magnet armatures 135 can be retracted into the dashed position due to the elasticity of the braking member 132. The magnet armatures 135 move parallel to the arrows 137. In order to maintain a constant gap between the drum 10 and the braking member 132, guide rings 134 can be arranged which guide the wire loop 132 in the radial and axial directions. While a simple arrangement of a braking element 132 in the form of a wrap spring is shown in FIG. 7a, a double arrangement can be seen in FIG. 7b. The same applies to the effect of this embodiment with regard to a gentle and controlled braking process for the weft thread as described above for other embodiments of the braking device.

Claims (5)

1. Schussfadenspeicher für Webmaschinen, dem von einer Vorratsspule (2) Faden (21) zugeführt wird und von dem diskontinuierlich Faden für den Eintrag in das Webfach einer Webmaschine abgezogen wird, mit einer Trommel (lO) zur Speicherung eines Schussfadenvorrats (23) und mit einer Bremsvorrichtung (13), bestehend aus einer rotationssymmetrischen Bremsfläche (103), wenigstens einem gegen die Bremsfläche verstellbaren elastisch verformbaren Bremsorgan (132) und einer Verstellvorrichtung (131) für das Bremsorgan relativ zur Bremsfläche, dadurch gekennzeichnet , dass die Verstellvorrichtung (131) direkt mit massenarmen sich an den Umfang der Bremsfläche anschmiegenden Teilen des Bremsorgans wirkungsverbunden ist.1. weft storage for looms, which is fed from a supply spool (2) thread (21) and from which discontinuous thread is drawn for entry into the shed of a loom, with a drum (10) for storing a supply of weft thread (23) and with a braking device (13) consisting of a rotationally symmetrical braking surface (103), at least one elastically deformable braking member (132) adjustable against the braking surface and an adjusting device (131) for the braking member relative to the braking surface, characterized in that the adjusting device (131) is direct with low-mass parts of the braking member which adhere to the circumference of the braking surface. 2. Speicher nach Anspruch 1, dadurch gekennzeichnet, dass die elastischen massenarmen Teile des Bremsorgans (132) aus einer Mehrzahl stabartiger nebeneinander am äusseren Trommelumfang (10) liegender Lamellen bestehen.2. Memory according to claim 1, characterized in that the elastic, low-mass parts of the braking member (132) consist of a plurality of rod-like plates lying side by side on the outer drum circumference (10). 3. Speicher nach Anspruch 1, dadurch gekennzeichnet, dass die Verstellvorrichtung (131) für das Bremsorgan (132) ein Elektromagnet ist.3. Memory according to claim 1, characterized in that the adjusting device (131) for the braking member (132) is an electromagnet. 4. Speicher nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Lamellen (137) in den Umfang der Trommel (10) integriert sind und rings um die Trommel (10) im Bereich der Lamellen (137) ein ringförmiger Elektromagnet (131) angeordnet ist.4. Memory according to claim 1 and 2, characterized in that the lamellae (137) are integrated into the circumference of the drum (10) and an annular electromagnet (131) is arranged around the drum (10) in the region of the lamellae (137) is. 5. Speicher nach Anspruch l, dadurch gekennzeichnet, dass das Bremsorgan (132) durch wenigstens eine den Trommelumfang umschliessende Schlinge gebildet ist.5. Memory according to claim l, characterized in that the braking member (132) is formed by at least one loop surrounding the drum circumference.
EP87810155A 1986-05-15 1987-03-18 Weft-storing device for looms Expired - Lifetime EP0246182B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1977/86A CH669804A5 (en) 1986-05-15 1986-05-15
CH1977/86 1986-05-15

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EP0246182A1 true EP0246182A1 (en) 1987-11-19
EP0246182B1 EP0246182B1 (en) 1990-01-31

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ID=4223037

Family Applications (1)

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EP87810155A Expired - Lifetime EP0246182B1 (en) 1986-05-15 1987-03-18 Weft-storing device for looms

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US (1) US4785855A (en)
EP (1) EP0246182B1 (en)
JP (1) JPS62276054A (en)
CH (1) CH669804A5 (en)
DE (1) DE3761573D1 (en)

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EP0330951A1 (en) * 1988-03-02 1989-09-06 L.G.L. ELECTRONICS S.p.A. Weft feeding device, particularly for looms
EP0345216A1 (en) * 1988-06-03 1989-12-06 GebràœDer Sulzer Aktiengesellschaft Weft yarn storage device for a loom
EP0357975A2 (en) * 1988-09-08 1990-03-14 NUOVA VAMATEX S.p.A. System to control the tension of the weft fed to a loom with continuous weft feed
EP0536088A1 (en) * 1991-09-20 1993-04-07 L.G.L. ELECTRONICS S.p.A. Modulated thread braking device for weft feeders
WO1994020402A1 (en) * 1993-02-23 1994-09-15 Nuova Roj Electrotex S.R.L. Yarn feeder
EP0652312A1 (en) * 1993-11-05 1995-05-10 L.G.L. ELECTRONICS S.p.A. Device for the positive modulated braking of thread for weft feeders
WO1995020700A2 (en) * 1994-01-26 1995-08-03 Iro Ab Controllable yarn brake, yarn feed device and projectile or gripper weaving machine
EP0707102A3 (en) * 1994-10-10 1998-05-27 L.G.L. ELECTRONICS S.p.A. Device for the positive modulated braking of the thread for weft feeders
CN109750410A (en) * 2019-03-08 2019-05-14 浙江宁巍机械科技有限公司 A kind of water-jet loom weft insertion system and its adjustment method

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JPH0759775B2 (en) * 1986-07-15 1995-06-28 津田駒工業株式会社 Weft insertion control device for fluid jet loom
JPH01260038A (en) * 1988-04-06 1989-10-17 Tagawa Kikai Kk Static drum-type weft reservoir
JP2905596B2 (en) 1990-03-12 1999-06-14 イーロー アーベー Yarn braking system
DE4127796A1 (en) * 1991-08-22 1993-02-25 Iro Ab THREAD FOURNISSEUR
DE19612720A1 (en) * 1996-03-29 1997-10-02 Iro Ab Thread delivery device
ITUB20152769A1 (en) * 2015-08-03 2017-02-03 Btsr Int Spa ACCUMULATION WIRE FEEDER WITH BRAKING ORGAN AND INTERCHANGEABLE ELEMENTS

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DE2253259A1 (en) * 1972-10-30 1974-05-09 Zbrojovka Vsetin Np Continuous weft measuring device - esp. for shuttleless looms adjusting length accurately by varying angular winding speed on measuring drum
DE2555802A1 (en) * 1975-12-11 1977-06-23 Lawson Hemphill Yarn tensioner for yarn storage drum - has two or more tensioning rings arranged axially over one another around drum
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330951A1 (en) * 1988-03-02 1989-09-06 L.G.L. ELECTRONICS S.p.A. Weft feeding device, particularly for looms
EP0345216A1 (en) * 1988-06-03 1989-12-06 GebràœDer Sulzer Aktiengesellschaft Weft yarn storage device for a loom
EP0357975A2 (en) * 1988-09-08 1990-03-14 NUOVA VAMATEX S.p.A. System to control the tension of the weft fed to a loom with continuous weft feed
EP0357975A3 (en) * 1988-09-08 1991-02-13 NUOVA VAMATEX S.p.A. System to control the tension of the weft fed to a loom with continuous weft feed
US5050648A (en) * 1988-09-08 1991-09-24 Vamatex S.P.A. System to control weft tension in a loom with continuous weft feed
EP0536088A1 (en) * 1991-09-20 1993-04-07 L.G.L. ELECTRONICS S.p.A. Modulated thread braking device for weft feeders
TR27557A (en) * 1993-02-23 1995-06-08 Roj Electrotex Nuova Srl Thread feeding tool with improved braking element.
WO1994020402A1 (en) * 1993-02-23 1994-09-15 Nuova Roj Electrotex S.R.L. Yarn feeder
US5673729A (en) * 1993-02-23 1997-10-07 Nuova Roj Electrotex S.R.L. Yarn feeder with adjustable braking mechanism
CN1039895C (en) * 1993-02-23 1998-09-23 诺瓦·罗伊电子公司 Yarn feeder
EP0652312A1 (en) * 1993-11-05 1995-05-10 L.G.L. ELECTRONICS S.p.A. Device for the positive modulated braking of thread for weft feeders
WO1995020700A2 (en) * 1994-01-26 1995-08-03 Iro Ab Controllable yarn brake, yarn feed device and projectile or gripper weaving machine
WO1995020700A3 (en) * 1994-01-26 1995-09-14 Iro Ab Controllable yarn brake, yarn feed device and projectile or gripper weaving machine
US5778943A (en) * 1994-01-26 1998-07-14 Iro Ab Controllable output brake, thread feed device as well as projectile or gripper weaving machine
CN1040676C (en) * 1994-01-26 1998-11-11 Iro有限公司 Controllable yarn brake, Yan feed device and projectile or gripper weaving machine
EP0707102A3 (en) * 1994-10-10 1998-05-27 L.G.L. ELECTRONICS S.p.A. Device for the positive modulated braking of the thread for weft feeders
CN109750410A (en) * 2019-03-08 2019-05-14 浙江宁巍机械科技有限公司 A kind of water-jet loom weft insertion system and its adjustment method
CN109750410B (en) * 2019-03-08 2023-10-10 浙江宁巍机械科技有限公司 Weft insertion system of water jet loom and debugging method thereof

Also Published As

Publication number Publication date
DE3761573D1 (en) 1990-03-08
US4785855A (en) 1988-11-22
JPS62276054A (en) 1987-11-30
CH669804A5 (en) 1989-04-14
EP0246182B1 (en) 1990-01-31

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