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EP0495229B1 - Yarn detector - Google Patents

Yarn detector Download PDF

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Publication number
EP0495229B1
EP0495229B1 EP91121911A EP91121911A EP0495229B1 EP 0495229 B1 EP0495229 B1 EP 0495229B1 EP 91121911 A EP91121911 A EP 91121911A EP 91121911 A EP91121911 A EP 91121911A EP 0495229 B1 EP0495229 B1 EP 0495229B1
Authority
EP
European Patent Office
Prior art keywords
thread
sensor
yarn
bristles
conveying channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91121911A
Other languages
German (de)
French (fr)
Other versions
EP0495229A1 (en
Inventor
Peter Mueller
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.)
Staeubli AG
Original Assignee
Staeubli AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Staeubli AG filed Critical Staeubli AG
Publication of EP0495229A1 publication Critical patent/EP0495229A1/en
Application granted granted Critical
Publication of EP0495229B1 publication Critical patent/EP0495229B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/14—Apparatus for threading warp stop-motion droppers, healds, or reeds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
    • B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
    • B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
    • B65H63/0327—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators using piezoelectric sensing means
    • 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 present invention relates to a thread monitor according to the preamble of claim 1.
  • a thread monitor is known from FR-A-2 343 067.
  • Thread monitors of this type are used wherever a transverse movement of a thread takes place, which can be the case, for example, when a thread is transferred from one organ to another or when a thread is removed from a supply.
  • Examples of this are thread feeders or multi-color changing devices for weaving machines, in particular for rapier weaving machines, or weaving preparation machines, such as, for example, knotting, splicing or drawing-in machines for warp threads.
  • the invention is now intended to provide a thread monitor that requires as little maintenance as possible, that has no wearing parts, that functions reliably under as many environmental conditions as possible, and that is also inexpensive.
  • the thread holding device shown serves to release a piece of thread F present in the form of a loop in a controlled manner under the action of a force pulling the thread from the thread holding device. It comprises an elongated conveying channel 1, which contains the thread loop 1 and thus fulfills the function of a thread store.
  • the loop is outside the delivery channel 1 on one leg in a fixed clamp and on its other leg, that is in the area of the free Thread end, fixed in a means of transport which pulls the thread F in the direction of arrow A out of the feed channel 1. So that this pulling out takes place in a controlled manner and the thread loop is retained until the very end, brake elements which act on the loop knee and hold the thread under tension are provided in the conveying channel 1.
  • the arrangement shown is part of a warp threading machine, as described for example in the international application PCT / CH90 / 00283 from Zellweger Uster AG.
  • the warp thread layer to be drawn is stretched on a vertical frame, which is positioned in front of the drawing-in machine and in front of its pull-in member which can be driven to oscillate perpendicular to the warp thread layer.
  • a so-called thread separation group is assigned to the pull-in member, along which the stretched warp threads are moved and separated and divided. After division, the warp threads are cut off and presented to the pull-in member, the thread holding device shown forming part of this thread presentation stage.
  • the thread presentation level is described in detail in international application no. PCT / CH 91/00229 and is not explained in more detail here.
  • the thread holding device essentially consists of the already mentioned conveyor channel 1, which is formed by two L-shaped rails 3 and 4 mounted on a base plate 2 which surround the shaft-like conveyor channel 1.
  • a continuous slot is formed between the two rails 3 and 4, which is covered by elastic bristles 5 made of a suitable material, for example made of steel or of a plastic such as nylon.
  • the bristles 5 are preferably embedded in a carrier tape, which is glued into a corresponding gradation on the inside of the right rail 4 in FIG. 1, and they are longer than the slot width at their part covering the slot.
  • the free head part of the bristles abuts the left rail 3, hereinafter referred to as the stop rail, and is bent thereon. This means that the bristles 5 press resiliently against the stop rail 3 with their head part.
  • the stop rail 3 has a window-like recess 6 towards the outlet end of the conveying channel 1, into which a piezoelectric sensor 7 is inserted, the wiring of which is located in a housing 8 connected to the stop rail 3 and / or to the base plate 2.
  • the operation of the piezo sensor is as follows: The thread loop F located in the conveying channel 1 is held at its knee, where the two loop legs meet, by a bristle 5 and jumps from one bristle to the next when pulled out of the conveying channel 1, whereby the Loop straight bristle 5 is pushed down and additionally tensioned and springs back into its initial position after passing the thread F.
  • the signal from the sensor 7 rated as confirmation of thread retraction.
  • the bristles 5 are guided in the area of the sensor 7 between two brackets 9 arranged on both sides of the bristle family, which prevent lateral deflection of the bristles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Glass Compositions (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Resistance Heating (AREA)
  • Paper (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Control Of Combustion (AREA)
  • Sewing Machines And Sewing (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

The yarn detector serves for detecting the passage of a yarn (F) moved in the transverse direction and contains a pivoting member (B) actuable by the yarn and a sensor (7) monitoring the actuation of this pivoting member. The pivoting member (B) is designed so that, during the passage of a yarn, a deflection out of its position of rest and thereafter a return to this take place, the sensor (7) being designed to detect this return. The pivoting member (B) is elastic and in one piece and the sensor (7) is pressure-sensitive. The sector of use is yarn stores and yarn-transfer devices, especially those in weaving and in warp preparation. <IMAGE>

Description

Die vorliegende Erfindung betrifft einen Fadenwächter gemäß dem Oberbegriff des Anspruchs 1. Ein solcher Fadenwächter ist aus der FR-A-2 343 067 bekannt.The present invention relates to a thread monitor according to the preamble of claim 1. Such a thread monitor is known from FR-A-2 343 067.

Fadenwächter dieser Art werden überall dort eingesetzt, wo eine Querbewegung eines Fadens stattfindet, was beispielsweise bei einer Fadenübergabe von einem Organ auf ein anderes oder bei Entnahme eines Fadens von einem Vorrat der Fall sein kann. Beispiele dafür sind Fadengeber oder Mehrfarben-Wechseleinrichtungen für Webmaschinen, insbesondere für Greiferwebmaschinen, oder Webereivorbereitungsmaschinen, wie beispielsweise Knüpf-, Spleiss- oder Einziehmaschinen für Kettfäden.Thread monitors of this type are used wherever a transverse movement of a thread takes place, which can be the case, for example, when a thread is transferred from one organ to another or when a thread is removed from a supply. Examples of this are thread feeders or multi-color changing devices for weaving machines, in particular for rapier weaving machines, or weaving preparation machines, such as, for example, knotting, splicing or drawing-in machines for warp threads.

In der Internationalen Anmeldung PCT/CH90/00283 ist eine Kettfadeneinziehmaschine beschrieben, bei welcher die Fadenschicht auf einem Rahmen aufgespannt ist, und die einzelnen Kettfäden nacheinander separiert, einem Einziehgreifer angeboten und von diesem in das Geschirr eingezogen werden. Der vertikal gespannte Kettfaden passiert nach der Uebernahme durch den Einziehgreifer in Schlaufenform einen vertikalen Fadenkanal, in welchem ein Fadenwächter der eingangs genannten Art angeordnet ist. Der Fadenwächter, der bei jedem Einzug überprüft, ob auch wirklich ein Kettfaden eingezogen worden ist, besteht aus einem federnden, durch den passierenden Faden verstellbaren Schwenkhebel, dessen Verstellung durch einen Induktivsensor überwacht wird.International application PCT / CH90 / 00283 describes a warp threading machine in which the thread layer is stretched over a frame, and the individual warp threads are separated one after the other, offered to a pull-in gripper and are pulled into the crockery by the latter. The vertically tensioned warp thread passes through a vertical thread channel after being taken over by the pull-in gripper in the form of a loop, in which a thread monitor of the type mentioned is arranged. The thread monitor, which checks whether a warp thread has really been drawn in with each feed, consists of a resilient swivel lever that can be adjusted by the passing thread, the adjustment of which is monitored by an inductive sensor.

Dieser Fadenwächter hat sich zwar in der Praxis gut bewährt, stellt aber wegen des einer gewissen Abnützung und Beanspruchung ausgesetzten Schwenkhebels noch keine optimale Lösung dar. Es kann auch nicht ausgeschlossen werden, dass der Induktivsensor bei starker Verstaubung nicht zuverlässig funktioniert. Da aber gerade von diesem Fadenwächter eine möglichst hohe Zuverlässigkeit verlangt wird, erfordert sein Betrieb einen gewissen, in jedem Fall unerwünschten Wartungsaufwand.Although this thread monitor has proven itself in practice, it is not yet an optimal solution due to the pivot lever being exposed to a certain amount of wear and tear. It cannot be ruled out that the inductive sensor will not function reliably in the case of heavy dust. However, since the highest possible level of reliability is required of this thread monitor, its operation requires a certain amount of maintenance, which is undesirable in any case.

Durch die Erfindung soll nun ein Fadenwächter angegeben werden, der möglichst keinen Wartungsaufwand erfordert, der keine Verschleissteile aufweist, der unter möglichst allen Umgebungsbedingungen zuverlässig funktioniert, und der noch dazu kostengünstig ist.The invention is now intended to provide a thread monitor that requires as little maintenance as possible, that has no wearing parts, that functions reliably under as many environmental conditions as possible, and that is also inexpensive.

Diese Aufgabe wird erfindungsgemäss durch einen Fadenwächter gemäß dem Anspruch 1 gelöst.This object is achieved according to the invention by a thread monitor according to claim 1.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels und der Zeichnungen näher erläutert; es zeigt:

Fig. 1
einen Ausschnitt aus einer einen erfindungsgemässen Fadenwächter aufweisenden Fadenhaltevorrichtung im Massstab von 1,5:1; und
Fig. 2
einen Ausschnitt aus Fig. 1 im Massstab von 3:1.
The invention is explained in more detail below using an exemplary embodiment and the drawings; it shows:
Fig. 1
a detail of a thread holding device having a thread monitor according to the invention on a scale of 1.5: 1; and
Fig. 2
a section of Fig. 1 on a scale of 3: 1.

Die dargestellte Fadenhaltevorrichtung dient dazu, ein in Form einer Schlaufe vorliegendes Fadenstück F bei Einwirkung einer den Faden aus der Fadenhaltevorrichtung ziehenden Kraft gesteuert freizugeben. Sie umfasst einen länglichen Förderkanal 1, welcher die Fadenschlaufe 1 enthält und somit die Funktion eines Fadenspeichers erfüllt. Die Schlaufe ist ausserhalb des Förderkanals 1 an einem Schenkel in einer ortsfesten Klemme und an ihrem anderen Schenkel, das ist im Bereich des freien Fadenendes, in einem Transportmittel fixiert, welches den Faden F in Richtung des Pfeiles A aus dem Förderkanal 1 herauszieht. Damit dieses Herausziehen kontrolliert erfolgt und die Fadenschlaufe bis zuletzt erhalten bleibt, sind im Förderkanal 1 auf das Schlaufenknie wirkende Bremselemente vorgesehen, welche den Faden gespannt halten.The thread holding device shown serves to release a piece of thread F present in the form of a loop in a controlled manner under the action of a force pulling the thread from the thread holding device. It comprises an elongated conveying channel 1, which contains the thread loop 1 and thus fulfills the function of a thread store. The loop is outside the delivery channel 1 on one leg in a fixed clamp and on its other leg, that is in the area of the free Thread end, fixed in a means of transport which pulls the thread F in the direction of arrow A out of the feed channel 1. So that this pulling out takes place in a controlled manner and the thread loop is retained until the very end, brake elements which act on the loop knee and hold the thread under tension are provided in the conveying channel 1.

Die dargestellte Anordnung ist Bestandteil einer Kettfadeneinziehmaschine, wie sie beispielsweise in der internationalen Anmeldung PCT/CH90/00283 der Zellweger Uster AG beschrieben ist. Bei dieser Einziehmaschine ist die einzuziehende Kettfadenschicht auf einem vertikalen Rahmen aufgespannt, welcher vor der Einziehmaschine und vor deren senkrecht zur Kettfadenschicht oszillierend antreibbarem Einziehorgan positioniert ist. Dem Einziehorgan ist eine sogenannte Fadentrenngruppe zugeordnet, an welcher die aufgespannten Kettfäden vorbeibewegt und dabei separiert und abgeteilt werden. Nach dem Abteilen werden die Kettfäden abgeschnitten und dem Einziehorgan präsentiert, wobei die dargestellte Fadenhaltevorrichtung Teil dieser Fadenpräsentierstufe bildet. Die Fadenpräsentierstufe ist in der internationalen Anmeldung Nr. PCT/CH 91/00229 ausführlich beschrieben und wird hier nicht näher erläutert.The arrangement shown is part of a warp threading machine, as described for example in the international application PCT / CH90 / 00283 from Zellweger Uster AG. In this drawing-in machine, the warp thread layer to be drawn is stretched on a vertical frame, which is positioned in front of the drawing-in machine and in front of its pull-in member which can be driven to oscillate perpendicular to the warp thread layer. A so-called thread separation group is assigned to the pull-in member, along which the stretched warp threads are moved and separated and divided. After division, the warp threads are cut off and presented to the pull-in member, the thread holding device shown forming part of this thread presentation stage. The thread presentation level is described in detail in international application no. PCT / CH 91/00229 and is not explained in more detail here.

Die Fadenhaltevorrichtung besteht im wesentlichen aus dem schon erwähnten Förderkanal 1, welcher durch zwei auf einer Grundplatte 2 montierte, L-förmige Schienen 3 und 4 gebildet ist, die den schachtartigen Förderkanal 1 umschliessen. An der von der Grundplatte 2 abgewandten Seite ist zwischen den beiden Schienen 3 und 4 ein durchgehender Schlitz gebildet, welcher durch elastische Borsten 5 aus einem geeigneten Material, beispielsweise aus Stahl oder aus einem Kunststoff wie Nylon, abgedeckt ist. Die Borsten 5 sind vorzugsweise in ein Trägerband eingebettet, welches in eine entsprechende Abstufung an der Innenseite der in Fig. 1 rechten Schiene 4 geklebt ist, und sie sind an ihrem den Schlitz überdeckenden Teil länger als die Schlitzbreite. Die Borsten stossen mit ihrem freien Kopfteil gegen die nachfolgend als Anschlagschiene bezeichnete linke Schiene 3 und sind an dieser umgebogen. Das bedeutet, dass die Borsten 5 mit ihrem Kopfteil federnd gegen die Anschlagschiene 3 drücken.The thread holding device essentially consists of the already mentioned conveyor channel 1, which is formed by two L-shaped rails 3 and 4 mounted on a base plate 2 which surround the shaft-like conveyor channel 1. On the side facing away from the base plate 2, a continuous slot is formed between the two rails 3 and 4, which is covered by elastic bristles 5 made of a suitable material, for example made of steel or of a plastic such as nylon. The bristles 5 are preferably embedded in a carrier tape, which is glued into a corresponding gradation on the inside of the right rail 4 in FIG. 1, and they are longer than the slot width at their part covering the slot. The free head part of the bristles abuts the left rail 3, hereinafter referred to as the stop rail, and is bent thereon. This means that the bristles 5 press resiliently against the stop rail 3 with their head part.

Die Anschlagschiene 3 weist gegen das Ausstrittsende des Förderkanals 1 zu eine fensterartige Ausnehmung 6 auf, in die ein piezoelektrischer Sensor 7 eingesetzt ist, dessen Beschaltung sich in einem mit der Anschlagschiene 3 und/oder mit der Grundplatte 2 verbundenen Gehäuse 8 befindet.The stop rail 3 has a window-like recess 6 towards the outlet end of the conveying channel 1, into which a piezoelectric sensor 7 is inserted, the wiring of which is located in a housing 8 connected to the stop rail 3 and / or to the base plate 2.

Die Funktionsweise des Piezosensors ist die folgende: Die im Förderkanal 1 befindliche Fadenschlaufe F ist an ihrem Knie, wo die beiden Schlaufenschenkel zusammenstossen, von einer Borste 5 gehalten und springt beim Herausziehen aus dem Förderkanal 1 von einer Borste zur nächsten, wobei die die Schlaufe gerade haltende Borste 5 nach unten weggedrückt und dabei zusätzlich gespannt wird und nach dem Passieren des Fadens F in ihre Ausgangslage zurückfedert.The operation of the piezo sensor is as follows: The thread loop F located in the conveying channel 1 is held at its knee, where the two loop legs meet, by a bristle 5 and jumps from one bristle to the next when pulled out of the conveying channel 1, whereby the Loop straight bristle 5 is pushed down and additionally tensioned and springs back into its initial position after passing the thread F.

Diese Situation ist in Fig. 2 dargestellt, und zwar in dem Moment, in dem der Faden F, oder genauer gesagt, das Knie der Fadenschlaufe, gerade den piezoelektrischen Sensor 7 erreicht. Im nächsten Moment trifft der Faden F auf eine mit B bezeichnete Borste, welche beim Passieren des Fadens von der mit vollen Linien eingezeichneten Stellung in die mit gestrichelten Linien eingezeichnete Stellung verschwenkt wird (gestrichelte Lage des Fadens). Sobald der Faden die Borste B passiert hat, schwenkt diese aus ihrer gestrichelten Lage in die Ruhelage zurück und schlägt dabei gegen den piezoelektrischen Sensor 7. Dieser Druckimpuls wird vom Sensor 7 detektiert und wird in der Signalverarbeitung als Signal für den Durchgang eines Fadens interpretiert. Da der Sensor 7 in der Nähe der Austrittsöffnung der Fadenschlaufe aus dem Förderkanal 1 angeordnet ist, also an einer Stelle, wo die Fadenschlaufe schon sehr kurz, und demzufolge der Faden schon zu einem Grossteil in das Geschirr eingezogen ist, wird das Signal des Sensors 7 als Bestätigung des erfolgten Fadeneinzugs bewertet.This situation is shown in FIG. 2, namely at the moment when the thread F, or more precisely the knee of the thread loop, is just reaching the piezoelectric sensor 7. In the next moment, the thread F meets a bristle labeled B, which is pivoted as it passes the thread from the position drawn with full lines to the position drawn with dashed lines (dashed position of the thread). As soon as the thread has passed the bristle B, it swivels back from its dashed position into the rest position and thereby strikes the piezoelectric sensor 7. This pressure pulse is detected by the sensor 7 and is interpreted in the signal processing as a signal for the passage of a thread. Since the sensor 7 is arranged in the vicinity of the exit opening of the thread loop from the conveying channel 1, that is to say at a point where the thread loop is already very short, and consequently the thread is already largely drawn into the dishes, the signal from the sensor 7 rated as confirmation of thread retraction.

Um sicherzustellen, dass die Teil des Fadenwächters bildende Borste B beim Zurückschwenken in die Ruhelage auf den piezoelektrischen Sensor 7 trifft und nicht neben diesem gegen die Anschlagschiene 3 schlägt, sind die Borsten 5 im Bereich des Sensors 7 zwischen zwei zu beiden Seiten der Borstenschar angeordneten Bügeln 9 geführt, welche ein seitliches Ausweichen der Borsten verhindern.To ensure that the bristle B forming part of the thread monitor hits the piezoelectric sensor 7 when pivoting back into the rest position and not against it against the Stop rail 3 strikes, the bristles 5 are guided in the area of the sensor 7 between two brackets 9 arranged on both sides of the bristle family, which prevent lateral deflection of the bristles.

Die praktische Erprobung hat gezeigt, dass der beschriebene Fadenwächter trotz seines einfachen Aufbaus absolut zuverlässig funktioniert. Besonders gute Resultate wurden mit folgenden Spezifikationen erzielt:
Borstenmaterial: Federstahl
Borstendicke: 0,3 mm
Ueberlänge der Borsten verglichen mit der Spaltbreite: 2 mm
Die Beschreibung der Anwendung des Fadenwächters an einer Kettfadeneinziehmaschine ist nicht als Einschränkung zu verstehen. Es ist für den Fachmann offenkundig, dass ein Fadenwächter dieser Art überall dort eingesetzt werden kann, wo der zu überwachende Faden eine Querbewegung vollführt.Practical testing has shown that the thread monitor described functions absolutely reliably despite its simple structure. Particularly good results were achieved with the following specifications:
Bristle material: spring steel
Bristle thickness: 0.3 mm
Excess length of the bristles compared to the gap width: 2 mm
The description of the use of the thread monitor on a warp threading machine is not to be understood as a restriction. It is obvious to a person skilled in the art that a thread monitor of this type can be used wherever the thread to be monitored makes a transverse movement.

Claims (2)

  1. Thread monitor for detecting the passage of a thread (F) moving in the transverse direction, having a conveying channel (1) for receiving the thread, having bristles (5) which bear flexibly with their one end against a stop rail (3) of the conveying channel, characterized in that the bristles tension the thread counter to a conveying direction (A) in which the thread is moved in the conveying channel, in that the conveying channel (1) has sunken into the stop rail (3) a pressure-sensitive sensor (7) which is passed over by the thread, so that bristles (5) deflected by the thread and in the subsequent return towards the stop rail emit a pressure impulse to the sensor, and in that the sensor is designed for detecting this pressure impulse.
  2. Thread-holding device according to Claim 1, characterized in that the sensor is designed as a piezoelectric quartz crystal.
EP91121911A 1991-01-10 1991-12-20 Yarn detector Expired - Lifetime EP0495229B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH52/91 1991-01-10
CH52/91A CH682676A5 (en) 1991-01-10 1991-01-10 Thread monitor.

Publications (2)

Publication Number Publication Date
EP0495229A1 EP0495229A1 (en) 1992-07-22
EP0495229B1 true EP0495229B1 (en) 1995-11-02

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EP91121911A Expired - Lifetime EP0495229B1 (en) 1991-01-10 1991-12-20 Yarn detector

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US (1) US5428878A (en)
EP (1) EP0495229B1 (en)
JP (1) JPH04300349A (en)
KR (1) KR920014969A (en)
AT (1) ATE129688T1 (en)
AU (1) AU8970591A (en)
CA (1) CA2056686A1 (en)
CH (1) CH682676A5 (en)
CZ (1) CZ281497B6 (en)
DE (1) DE59106824D1 (en)
DK (1) DK0495229T3 (en)
ES (1) ES2080881T3 (en)
PT (1) PT99994B (en)
RU (1) RU2046857C1 (en)
TR (1) TR27356A (en)

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SE515344C2 (en) * 1994-02-08 2001-07-16 Ericsson Telefon Ab L M Distributed database system
CN102851853A (en) * 2012-09-28 2013-01-02 吴江市隆泰喷织厂 Broken warp capture device of water jet loom

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Publication number Priority date Publication date Assignee Title
CH283390A (en) * 1950-03-08 1952-06-15 Benninger Ag Maschf Electric thread monitor device on a slip gate.
GB706192A (en) * 1951-02-07 1954-03-24 Mackie & Sons Ltd J Improvements in stop mechanisms for drawing frames and similar textile machines
JPS52107361A (en) * 1976-03-04 1977-09-08 Nissan Motor Woof detecting device of weaving machine
DE2736979C2 (en) * 1977-08-17 1983-04-14 Karl Mayer Textil-Maschinen-Fabrik Gmbh, 6053 Obertshausen Device for interrupting the thread run in the event of thread breakage on textile machines
CH639486A5 (en) * 1979-09-14 1983-11-15 Mettler S Fr Soehne Ag Maschin PIEZOELECTRIC SENSOR FOR GENERATING A SIGNAL DEPENDING ON THE TENSIONAL STRENGTH OF A TEXTILE THREAD.
US4551591A (en) * 1984-06-18 1985-11-05 Jones Robert E Stop motion switch
CS253087B1 (en) * 1985-04-03 1987-10-15 Otakar Curda Thread motion guard
CH679598A5 (en) * 1989-12-22 1992-03-13 Zellweger Uster Ag

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Publication number Publication date
KR920014969A (en) 1992-08-26
DK0495229T3 (en) 1995-12-18
ES2080881T3 (en) 1996-02-16
RU2046857C1 (en) 1995-10-27
CH682676A5 (en) 1993-10-29
EP0495229A1 (en) 1992-07-22
US5428878A (en) 1995-07-04
CZ281497B6 (en) 1996-10-16
AU8970591A (en) 1992-07-16
DE59106824D1 (en) 1995-12-07
CS5892A3 (en) 1992-08-12
PT99994A (en) 1994-03-31
PT99994B (en) 1999-02-26
JPH04300349A (en) 1992-10-23
ATE129688T1 (en) 1995-11-15
TR27356A (en) 1995-01-17
CA2056686A1 (en) 1992-07-11

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