EP0224850B1 - Draw-off device for the cloth in a textile machine - Google Patents

Draw-off device for the cloth in a textile machine Download PDF

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Publication number
EP0224850B1
EP0224850B1 EP86116346A EP86116346A EP0224850B1 EP 0224850 B1 EP0224850 B1 EP 0224850B1 EP 86116346 A EP86116346 A EP 86116346A EP 86116346 A EP86116346 A EP 86116346A EP 0224850 B1 EP0224850 B1 EP 0224850B1
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EP
European Patent Office
Prior art keywords
roll
pressure
take
pressing
presser
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Expired
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EP86116346A
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German (de)
French (fr)
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EP0224850A1 (en
Inventor
Georg Senn
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Sulzer AG
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Gebrueder Sulzer AG
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Publication of EP0224850A1 publication Critical patent/EP0224850A1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/20—Take-up motions; Cloth beams

Definitions

  • the invention relates to a take-off device for the fabric web of a textile, preferably a weaving machine, with a driven fabric take-off roller and a deflecting element for the fabric upstream or downstream thereof, the clear distance between the deflecting elements being smaller than the diameter of the material removal roller, and a pressing device acting on the circumference of the fabric take-off roller, with a pressing part extending essentially over the length of the fabric take-off roller.
  • a rail-shaped pressing part of springs is pressed against the fabric take-off roller.
  • This version brings satisfactory results for a certain material made of a certain material and of a certain web width, given the force of the springs.
  • Sensitive items such as certain fabrics made of synthetic or glass fibers can be damaged by the frictional forces between the fabric and the pressing part, so that pressing is undesirable during normal operation of the weaving machine, i.e. the pressing part is to be lifted off the fabric take-off roller. It is also necessary to lift the contact part off the fabric take-off roller when placing a new chain on the machine.
  • the movable fabric take-off roller is automatically pressed sufficiently strongly against the deflection elements by the normal tensile forces in the fabric web to pull off the fabric without slipping and to maintain the necessary warp tension. If the fabric train e.g. in the event of a malfunction in the warp let-off circuit or in the fabric drive that becomes so low that the self-generated contact pressure is no longer sufficient to ensure the non-slip fabric take-off, additional contact pressure is necessary.
  • the pressing device known from CH-PS 615 644 cannot meet the changing requirements for the contact pressure of the pressing part described above. According to the teaching of the patent specification CH-PS 615 644, the change in the contact pressure would only be possible with complex constructional means.
  • the invention has for its object to provide with simple means an improved fabric removal device that generates a uniform contact pressure across the entire width of the contact part and the contact pressure can be quickly and easily adapted to changing requirements.
  • this object is achieved by a fabric extraction device which has the characterizing features of the claims.
  • a fabric extraction device with hydraulically or hydraulically pneumatically generated contact pressure can also be advantageous.
  • a particularly rapid pressure build-up is achieved if a chamber of the hollow body contains liquid which is separated from the compressed air by a movable membrane. The compressed air acts on the liquid through the membrane. The pressure in the hollow body and thus also the contact pressure build up more quickly when it is switched on, since only a fraction of the volume of the hollow body has to be filled with compressed air.
  • the fabric web 10 is guided over the fixed inlet roller 12, the floating fabric take-off roller 13 and the likewise fixed outlet roller 14.
  • the clear width L between the inlet roller 12 and the outlet roller 14 is smaller than the outer diameter D of the fabric take-off roller 13. Due to the tensile force in the running direction in the fabric web 10, the floating fabric take-off roller 13 is pressed evenly against the inlet and outlet rollers 12, 14. The greater the tension in the fabric, the higher the contact pressure.
  • the floating fabric take-off roller 13, which is movable transversely to the longitudinal axis, is laterally driven via a ball or universal joint, not shown.
  • the inlet and outlet rollers 12, 14 can also be driven laterally at the peripheral speed of the fabric take-off roller 14 or can only be rotatably supported and be driven by the fabric take-off roller 13 via the fabric web 10.
  • the inlet roller 12 is often designed as a spreader roller, with a thread-like structure running in opposite directions from the center to both sides.
  • the pressing device 20 serves to increase the contact pressure of the fabric take-off roller 13 against the fabric web 10 and the inlet and outlet rollers 12, 14. It consists essentially of the U-shaped support profile 21 and the pressure rail 22 and the elastic pressure hose 23 as a flexible hollow body.
  • the pressure hose 23 is pressurized with compressed air via the inlet 24 and presses the pressure rail 22 (arrow) against the fabric web 10 and the fabric take-off roller 13. By changing the pressure in the pressure hose 23, the pressure is adjusted to the operating requirements. If the pressure hose 23 is completely relieved of pressure, the pressure rail 22 moves away from the fabric take-off roller 13 and no longer presses against the fabric web 10 and fabric take-off roller 13.
  • inlet and outlet rollers 12, 14 are rotatably mounted in trough-shaped recesses 32, 34 of the U-shaped holder arms 31, 33 of the holder 3.
  • a plurality of such holders 3 are arranged across the width of the weaving machine, all of which are fixedly connected to the machine frame 4.
  • the U-shaped carrier profile 21 of the pressing device 20 is fastened in the recess 30 of the holder 3.
  • the pressure rail 22 is e.g. Made of an elastic material, so that the contact surface trough-shaped adapts to the circumference of the fabric take-off roller 14 with the fabric web 10.
  • the contact surface can also be trough-shaped.
  • At least the contact surface of the contact part 22 advantageously consists of a material such as e.g. Nylon, Teflon, which exerts low frictional forces on the fabric web 10.
  • the surface of the pressing part 22 facing the pressure hose 23 is trough-shaped adapted to the surface of the hose 23.
  • FIG. 3 and 4 show a fabric take-off device 11 with a pressure roller 27 which is rotatably mounted on the rail 25.
  • This rail 25 made of a rubber or plastic material carries in a groove a metal rail 26 with a smooth surface, on which the pressure roller 27 is supported and rotated with low friction.
  • the pressure roller 27 can consist of metal or a plastic.
  • a fabric take-off device 11 is particularly gentle on the fabric if not only the fabric take-off roller 13 and the inlet and outlet rollers 12, 14, but also the pressure roller 27 which is movable transversely to the longitudinal axis (double arrow) is driven at the same peripheral speed. All four rollers 12, 13, 14, 27 are driven laterally, for example, with a gear drive driven by the main drive of the weaving machine via shafts and movable cardan or ball joints. If the compressed air is discharged into pressure hose 23, drive roller 27 and rail 25 lower under the influence of gravity.
  • the contact pressure of the pressure roller 27 against the fabric take-off roller 13 is adapted to the respective operating requirements by simply changing the pressure in the hose 23.
  • a pressure hose or a pressure chamber of the hollow body 23 is in turn assigned to each of these sections.
  • the compressed air is supplied to the pressure hose 23 of the material take-off device 20 from a Druci fragrance container 40 via the controllable valve 41, the pressure gauge 42 and the pressure relief valve 43.
  • the warp thread tension is continuously measured with the warp thread tension meter 44, 45.
  • the control unit 5 continuously receives the electrical warp tension signal from the converter 44 of the warp tension sensor 45.
  • a threshold value for the warp thread tension is set with the adjusting knob 51.
  • the highest air pressure in the pressure hose 23 that is permissible for a specific article, i.e. the maximum permissible contact pressure is set.
  • the valve 41 is opened and the pressure hose 23 is filled with compressed air from the compressed air tank 40.
  • the level of the pressure is measured by the manometer 42 and transmitted to the control electronics of the control unit 5 in the form of an electrical signal.
  • the valve 41 closes. If a lower pressure is required, the vent valve 43 releases enough air until the new setpoint pressure is reached. This venting process is also monitored by the manometer 42.
  • the push button 53 it is possible at any time to switch off the automatic and to apply compressed air to the pressure hose 23.
  • the push button 54 allows the automatic system to be switched off and the compressed air to be discharged from the pressure hose 23.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Description

Die Erfindung bezieht sich auf eine Abzugsvorrichtung für die Stoffbahn einer Textil-, vorzugsweise Webmaschine mit einer angetriebenen Stoffabzugswalze und je einem ihr vor- bzw. nachgeschalteten Umlänkelement für den Stoff, wobei der lichte Abstand zwischen den Umlenkelementen kleiner als der Durchmesser der Stotfabzugswalze ist, sowie einer auf den Umfang der Stoffabzugswaize wirkenden Anpressvorrichtung, mit einem sich im wesentlichen über die Länge der Stoffabzugswalze erstreckenden Anpressteil.The invention relates to a take-off device for the fabric web of a textile, preferably a weaving machine, with a driven fabric take-off roller and a deflecting element for the fabric upstream or downstream thereof, the clear distance between the deflecting elements being smaller than the diameter of the material removal roller, and a pressing device acting on the circumference of the fabric take-off roller, with a pressing part extending essentially over the length of the fabric take-off roller.

Bei bekannter Abzugsvorrichtung dieser Art (CH-PS 615 644) wird ein schienenförmiger Anpressteil von Federn gegen die Stoffabzugswalze gedrückt. Diese Ausführung bringt jeweils bei einem bestimmten Stoff aus einem bestimmten Material und von bestimmter Warenbahnbreite, bei einer gegebenen Kraft der Federn befriedigende Resultate. Wenn auf einer Maschine aber verschiedenartige Artikel hergestellt werden, kann es erforderlich sein, den Anpressdruck des Anpressteils den jeweiligen Verhältnissen anzupassen und zu erhöhen oder zu erniedrigen. Empfindliche Artikel wie gewisse Gewebe aus Kunst- oder Glasfasern können durch die Reibungskräfte zwischen Stoff und Anpressteil beschädigt werden, so dass im Normalbetrieb der Webmaschine das Anpressen unerwünscht ist, d.h. der Anpressteil von der Stoffabzugswalze abgehoben werden soll. Das Abheben des Anpressteils von der Stoffabzugswalze ist auch beim Auflegen einer neuen Kette auf die Maschine erforderlich. Diese Anfordungen sind mit bisher bekannten Vorrichtungen nur mit Hilfe von aufwendigen maschinenbaulichen Massnahmen möglich.In a known take-off device of this type (CH-PS 615 644), a rail-shaped pressing part of springs is pressed against the fabric take-off roller. This version brings satisfactory results for a certain material made of a certain material and of a certain web width, given the force of the springs. However, if different types of articles are produced on one machine, it may be necessary to adapt the contact pressure of the contact part to the respective conditions and to increase or decrease it. Sensitive items such as certain fabrics made of synthetic or glass fibers can be damaged by the frictional forces between the fabric and the pressing part, so that pressing is undesirable during normal operation of the weaving machine, i.e. the pressing part is to be lifted off the fabric take-off roller. It is also necessary to lift the contact part off the fabric take-off roller when placing a new chain on the machine. These requirements are only possible with previously known devices with the help of complex mechanical engineering measures.

Die bewegliche Stoffabzugswalze wird durch die normalen Zugkräfte in der Stoffbahn, selbsttätig genügend stark gegen die Umlenkelemente gepresst, um den Stoff rutschfrei abzuziehen und die erforderliche Kettspannung aufrechtzuerhalten. Wenn der Stoffzug z.B. bei einer Störung in der Kettnachlassschaltung oder im Warenbaumantrieb so niedrig wird, dass der selbsttätig erzeugte Anpressdruck nicht mehr genügt, den rutschfreien Stoffabzug zu gewährleisten, ist zusätzlicher Anpressdruck notwendig.The movable fabric take-off roller is automatically pressed sufficiently strongly against the deflection elements by the normal tensile forces in the fabric web to pull off the fabric without slipping and to maintain the necessary warp tension. If the fabric train e.g. in the event of a malfunction in the warp let-off circuit or in the fabric drive that becomes so low that the self-generated contact pressure is no longer sufficient to ensure the non-slip fabric take-off, additional contact pressure is necessary.

Die durch CH-PS 615 644 bekannte Anpressvorrichtung vermag den oben beschriebenen wechselnden Anforderungen an den Anpressdruck des Anpressteils nicht zu erfüllen. Die Veränderung der Anpresskraft wäre nach der Lehre der Patentschrift CH-PS 615 644 nur mit aufwendigen konstruktiven Mitteln überhaupt möglich.The pressing device known from CH-PS 615 644 cannot meet the changing requirements for the contact pressure of the pressing part described above. According to the teaching of the patent specification CH-PS 615 644, the change in the contact pressure would only be possible with complex constructional means.

Der Erfindung liegt die Aufgabe zugrunde, mit einfachen Mitteln eine in dieser Hinsicht verbesserte Stoffabzugsvorrichtung zu schaffen, die über die ganze Breite des Anpressteils einen gleichmässigen Anpressdruck erzeugt und der Anpressdruck in einfacher Weise schnell den wechselnden Erfordernissen angepasst werden kann. Diese Aufgabe wird erfindungsgemäss durch eine Stoffabzugsvorrichtung gelöst, welche die kennzeichnenden Merkmale der Ansprüche aufweist. Mit dem Verändern des Drucks im Hohlkörper aus flexiblem Material wird der Anpressdruck des Anpressteils an die Stoffabzugswalze schnell und exakt den wechselnden Erfordernissen angepasst, womit jederzeit ein höchst stoffschonender Stoffabzug gewährleistet ist. Zudem ist der Anpressdruck des Anpressteils über die ganze Warenbreite gleichmässig und der Anpressteil behält dennoch die Fähigkeit, sich wo nötig sogar gewissen Oberflächenstrukturen des Stoffs anzupassen.The invention has for its object to provide with simple means an improved fabric removal device that generates a uniform contact pressure across the entire width of the contact part and the contact pressure can be quickly and easily adapted to changing requirements. According to the invention, this object is achieved by a fabric extraction device which has the characterizing features of the claims. By changing the pressure in the hollow body made of flexible material, the contact pressure of the pressing part on the material take-off roller is quickly and precisely adapted to the changing requirements, which ensures a material-friendly material take-off at all times. In addition, the contact pressure of the contact part is even across the entire width of the goods and the contact part still retains the ability to adapt to certain surface structures of the fabric where necessary.

Obschon gerade bei Luftdüsenwebmaschinen Luft das bevorzugte Druckmittel sein wird, kann auch eine Stoffabzugsvorrichtung mit hydraulisch oder hydraulisch pneumatisch erzeugtem Anpressdruck vorteilhaft sein. Ein besonders schneller Druckaufbau wird erzielt, wenn eine Kammer des Hohlkörpers Flüssigkeit enthält, die durch eine bewegliche Membrane von der Druckluft getrennt ist. Die Druckluft wirkt über die Membrane auf die Flüssigkeit. Der Druck im Hohlkörper und damit auch der Anpressdruck bauen sich beim Zuschalten schneller auf, da nur ein Bruchteil des Volumens des Hohlkörpers mit Druckluft gefüllt werden muss.Although air will be the preferred pressure medium in air jet weaving machines in particular, a fabric extraction device with hydraulically or hydraulically pneumatically generated contact pressure can also be advantageous. A particularly rapid pressure build-up is achieved if a chamber of the hollow body contains liquid which is separated from the compressed air by a movable membrane. The compressed air acts on the liquid through the membrane. The pressure in the hollow body and thus also the contact pressure build up more quickly when it is switched on, since only a fraction of the volume of the hollow body has to be filled with compressed air.

Nachstehend wird die Erfindung anhand der Zeichnung von Ausführungsbeispielen erläutert. Es zeigen:

  • Fig. 1 schematisch, perspektivisch eine erfindungsgemässe Stoffabzugsvorrichtung;
  • Fig. 2 eine schematische Seitenansicht der Stoffabzugsvorrichtung von Fig. 1;
  • Fig. 3 die schematische Seitenansicht einer erfindungsgemässen Stoffabzugsvorrichtung mit einer Anpresswalze;
  • Fig. 4 ein mögliches Schaltprinzip für eine erfindungsgemässe Stoffabzugsvorrichtung mit gesteuertem, veränderbarem Druck im Hohlkörper.
The invention is explained below with reference to the drawing of exemplary embodiments. Show it:
  • Fig. 1 schematically, in perspective, a fabric removal device according to the invention;
  • Fig. 2 is a schematic side view of the fabric take-off device of Fig. 1;
  • 3 shows the schematic side view of a fabric removal device according to the invention with a pressure roller;
  • Fig. 4 shows a possible switching principle for a fabric extraction device according to the invention with controlled, variable pressure in the hollow body.

In der Stoffabzugsvorrichtung 11 von Fig. 1 einer hier nicht gezeichneten Webmaschine wird die Stoffbahn 10 über die feststehende Einlaufwalze 12, die schwimmende Stoffabzugswalze 13 und die ebenfalls feststehende Auslaufwalze 14 geführt. Die lichte Weite L zwischen Einlaufwalze 12 und Auslaufwalze 14 ist kleiner als der Aussendurchmesser D der Stoffabzugswalze 13. Durch die Zugkraft in Laufrichtung in der Stoffbahn 10 wird die schwimmende Stoffabzugswalze 13 gleichmässig gegen Einlauf- und Auslaufwalze 12, 14 gepresst. Der Anpressdruck ist um so höher, je grösser der Zug in der Stoffbahn ist. Die schwimmende, quer zur Längsachse bewegliche Stoffabzugswalze 13 ist über eine nicht gezeigtes Kugel- oder Kardangelenk seitlich angetrieben. Die Ein- und die Auslaufwalze 12, 14 können ebenfalls mit der Umfangsgeschwindigkeit der Stoffabzugswalze 14 seitlich angetrieben oder lediglich drehbar gelagert sein und von der Stoffabzugswalze 13 über die Stoffbahn 10 angetrieben werden. Die Einlaufwalze 12 ist häufig als Breithalterwalze, mit von der Mitte aus nach beiden Seiten gegenläufiger, gewindeartiger Struktur ausgebildet.In the fabric take-off device 11 of FIG. 1 of a weaving machine, not shown here, the fabric web 10 is guided over the fixed inlet roller 12, the floating fabric take-off roller 13 and the likewise fixed outlet roller 14. The clear width L between the inlet roller 12 and the outlet roller 14 is smaller than the outer diameter D of the fabric take-off roller 13. Due to the tensile force in the running direction in the fabric web 10, the floating fabric take-off roller 13 is pressed evenly against the inlet and outlet rollers 12, 14. The greater the tension in the fabric, the higher the contact pressure. The floating fabric take-off roller 13, which is movable transversely to the longitudinal axis, is laterally driven via a ball or universal joint, not shown. The inlet and outlet rollers 12, 14 can also be driven laterally at the peripheral speed of the fabric take-off roller 14 or can only be rotatably supported and be driven by the fabric take-off roller 13 via the fabric web 10. The inlet roller 12 is often designed as a spreader roller, with a thread-like structure running in opposite directions from the center to both sides.

Die Anpressvorrichtung 20 dient zur Erhöhung des Anpressdrucks der Stoffabzugswalze 13 an die Stoffbahn 10 sowie die Ein- und Auslaufwalzen 12, 14. Sie besteht im wesentlichen aus dem U-förmigen Trägerprofil 21 und der Anpressschiene 22 sowie dem elastischen Druckschlauch 23 als flexiblem Hohlkörper. Der Druckschlauch 23 wird über den Eingang 24 mit Druckluft beaufschlagt und drückt die Anpressschiene 22 (Pfeil) gegen Stoffbahn 10 und Stoffab zugswalze 13. Durch Verändern des Drucks im Druckschlauch 23 wird der Anpressdruck den Betriebserfordemissen angepasst. Ist der Druckschlauch 23 vollständig druckentlastet, so bewegt sich die Anpressschiene 22 von der Stoffabzugswalze 13 weg und presst überhaupt nicht mehr gegen Stoffbahn 10 und Stoffabzugswalze 13.The pressing device 20 serves to increase the contact pressure of the fabric take-off roller 13 against the fabric web 10 and the inlet and outlet rollers 12, 14. It consists essentially of the U-shaped support profile 21 and the pressure rail 22 and the elastic pressure hose 23 as a flexible hollow body. The pressure hose 23 is pressurized with compressed air via the inlet 24 and presses the pressure rail 22 (arrow) against the fabric web 10 and the fabric take-off roller 13. By changing the pressure in the pressure hose 23, the pressure is adjusted to the operating requirements. If the pressure hose 23 is completely relieved of pressure, the pressure rail 22 moves away from the fabric take-off roller 13 and no longer presses against the fabric web 10 and fabric take-off roller 13.

In der schematischen Seitenansicht von Fig. 2 sind Ein- und Auslaufwalzen 12, 14 in muldenförmigen Ausnehmungen 32, 34 der U-förmig angeordneten Halterarme 31, 33 des Halters 3 drehbar gelagert. Ueber die Breite der Webmaschine sind mehrere derartige Halter 3 angeordnet, die alle mit dem Maschinengestell 4 ortsfest verbunden sind. Das U-förmige Trägerprofil 21 der Anpressvorrichtung 20 ist in der Ausnehmung 30 des Halters 3 befestigt. Die Anpressschiene 22 besteht z.B. aus einem elastischen Material, so dass die Anpressfläche muldenförmig dem Umfang der Stoffabzugswalze 14 mit der Stoffbahn 10 anpasst. Die Anpressfläche kann auch muldenförmig ausgebildet sein. Wenigstens die Anpressfläche des Anpressteils 22 besteht mit Vorteil aus einem Material wie z.B. Nylon, Teflon, das niedrige Reibungskräfte auf die Stoffbahn 10 ausübt. Die dem Druckschlauch 23 zugekehrte Oberfläche des Anpressteils 22 ist der Oberfläche des Schlauchs 23 muldenförmig angepasst.In the schematic side view of FIG. 2, inlet and outlet rollers 12, 14 are rotatably mounted in trough-shaped recesses 32, 34 of the U-shaped holder arms 31, 33 of the holder 3. A plurality of such holders 3 are arranged across the width of the weaving machine, all of which are fixedly connected to the machine frame 4. The U-shaped carrier profile 21 of the pressing device 20 is fastened in the recess 30 of the holder 3. The pressure rail 22 is e.g. Made of an elastic material, so that the contact surface trough-shaped adapts to the circumference of the fabric take-off roller 14 with the fabric web 10. The contact surface can also be trough-shaped. At least the contact surface of the contact part 22 advantageously consists of a material such as e.g. Nylon, Teflon, which exerts low frictional forces on the fabric web 10. The surface of the pressing part 22 facing the pressure hose 23 is trough-shaped adapted to the surface of the hose 23.

Fig. 3 und 4 zeigen eine Stoffabzugsvorrichtung 11 mit einer Anpresswalze 27, die auf der Schiene 25 drehbar gelagert ist. Diese Schiene 25 aus einem Gummi- oder Plastikmaterial trägt in einer Nute eine Metallschiene 26 mit glatter Oberfläche, auf welcher die Anpresswalze 27 abgestützt und reibungsarm dreht. Die Anpresswalze 27 kann aus Metall oder einem Kunststoff bestehen.3 and 4 show a fabric take-off device 11 with a pressure roller 27 which is rotatably mounted on the rail 25. This rail 25 made of a rubber or plastic material carries in a groove a metal rail 26 with a smooth surface, on which the pressure roller 27 is supported and rotated with low friction. The pressure roller 27 can consist of metal or a plastic.

Besonders stoffschonend arbeitet eine Stoffabzugsvorrichtung 11, wenn nicht nur die Stoffabzugswalze 13, sowie Einlauf- und Auslaufwalze 12, 14, sondern auch die quer zur Längsachse bewegliche (Doppelpfeil) Anpresswalze 27 mit gleicher Umfangsgeschwindigkeit angetrieben ist. Der Antrieb aller vier Walzen 12, 13, 14, 27 erfolgt beispielsweise seitlich, mit einem vom Hauptantrieb der Webmaschine angetriebenen Zahnradgetriebe über Wellen und bewegliche Kardan- oder Kugelgelenke. Wird die Druckluft in Druckschlauch 23 abgelassen, senken sich Antriebswalze 27 und Schiene 25 unter der Einwirkung der Schwerkraft ab.A fabric take-off device 11 is particularly gentle on the fabric if not only the fabric take-off roller 13 and the inlet and outlet rollers 12, 14, but also the pressure roller 27 which is movable transversely to the longitudinal axis (double arrow) is driven at the same peripheral speed. All four rollers 12, 13, 14, 27 are driven laterally, for example, with a gear drive driven by the main drive of the weaving machine via shafts and movable cardan or ball joints. If the compressed air is discharged into pressure hose 23, drive roller 27 and rail 25 lower under the influence of gravity.

Der Anpressdruck der Anpresswalze 27 an die Stoffabzugswalze 13 wird mit dem einfachen Verändem des Drucks im Schlauch 23 den jeweiligen Betrieberfordemissen angepasst. Für breite Webmaschinen auf denen zwei oder mehr Stoffbahnen 10 hergestellt werden, ist es möglich, eine aus mehreren Teilen d.h. Abschnitten, bestehende Anpressschiene - oder Anpresswalze 22, 27 mit z.B. je einem Abschnitt für jede Stoffbahn zu verwenden. Jedem dieser Abschnitte wiederum ist beispielsweise ein Druckschlauch oder eine Druckkammer des Hohlkörpers 23 zugeordnet.The contact pressure of the pressure roller 27 against the fabric take-off roller 13 is adapted to the respective operating requirements by simply changing the pressure in the hose 23. For wide weaving machines on which two or more fabric webs 10 are produced, it is possible to make one out of several parts, i.e. Sections, existing pressure rail - or pressure roller 22, 27 with e.g. to use one section for each fabric. A pressure hose or a pressure chamber of the hollow body 23 is in turn assigned to each of these sections.

In Fig. 4 ist eine mögliche Anordnung für die automatische Anpassung des Anpressdrucks an die wechselnden Betriebserfordemisse schematisch gezeigt.4 shows a possible arrangement for the automatic adaptation of the contact pressure to the changing operating requirements is shown schematically.

Von einem Druciduftbehälter 40 wird die Druckluft über das steuerbare Ventil 41, das Manometer 42 und das Druckablassventil 43 dem Druckschlauch 23 der Stoffabzugsvorrichtung 20 zugeführt. Die Kettfadenspannung wird mit dem Kettfadenspannungsmesser 44, 45 laufend gemessen. Die Steuer- und Regeleinheit 5 erhält vom Wandler 44 des Kettfadenspannungsfühlers 45 laufend das elektrische Kettfadenspannungssignal. Mit den Einstellknopf 51 wird ein Schwellwert für die Kettfadenspannung eingestellt. Am Einstellknopf 52 wird der für einen bestimmten Artikel zulässiger, höchste Luftdruck im Druckschlauch 23, d.h. der höchst zulässige' Anpressdruck eingestellt. Sobald das vom Kettfadenspannungsmesser 44, 45 erzeugte Kettfadenspannungssignal, den an der Einstellung 51 gewählten Wert unterschreitet, wird das Ventil 41 geöffnet und der Druckschlauch 23 wird mit Druckluft vom Druckluftbehälter 40 gefüllt. Die Höhe des Drucks wird vom Manometer 42 gemessen und der Regelelektronik der Regeleinheit 5 in Form eines elektrischen Signals übermittelt. Sobald der erforderliche Druck erreicht ist, schliesst das Ventil 41. Ist ein niedrigerer Druck erforderlich, wird über das Entlüftungsventil 43 soviel Luft abgelassen bis der neue Solldruck erreicht ist. Auch dieser Entlüftungsvorgang wird vom Manometer 42 überwacht.The compressed air is supplied to the pressure hose 23 of the material take-off device 20 from a Druci fragrance container 40 via the controllable valve 41, the pressure gauge 42 and the pressure relief valve 43. The warp thread tension is continuously measured with the warp thread tension meter 44, 45. The control unit 5 continuously receives the electrical warp tension signal from the converter 44 of the warp tension sensor 45. A threshold value for the warp thread tension is set with the adjusting knob 51. The highest air pressure in the pressure hose 23 that is permissible for a specific article, i.e. the maximum permissible contact pressure is set. As soon as the warp tension signal generated by the warp tension meter 44, 45 falls below the value selected at the setting 51, the valve 41 is opened and the pressure hose 23 is filled with compressed air from the compressed air tank 40. The level of the pressure is measured by the manometer 42 and transmitted to the control electronics of the control unit 5 in the form of an electrical signal. As soon as the required pressure has been reached, the valve 41 closes. If a lower pressure is required, the vent valve 43 releases enough air until the new setpoint pressure is reached. This venting process is also monitored by the manometer 42.

Mit der Drucktaste 53 ist es jederzeit möglich, die Automatik auszuschalten und den Druckschlauch 23 mit Druckluft zu beaufschlagen. Umgekehrt erlaubt die Drucktaste 54, die Automatik auszuschalten und die Druckluft aus dem Druckschlauch 23 abzulassen.With the push button 53 it is possible at any time to switch off the automatic and to apply compressed air to the pressure hose 23. Conversely, the push button 54 allows the automatic system to be switched off and the compressed air to be discharged from the pressure hose 23.

Claims (12)

1. A take-up device for the cloth beam of a textile machine, more particularly a loom, having: a driven take-up roll and cloth-deflecting elements disposed one before and one after the roll, the gap between the deflecting elements being less than roll diameter; and a pressing device which acts on the roll periphery and has a presser extending substantially over the length of the roll (13), characterised in that the pressing device (20) has at least one flexible- walled hollow member (23) acting on the presser, the hollow member (23) being so connectable to a pressure source (40) as when under pressure to press the roll (13) against the deflecting elements (12, 14).
2. A device according to claim 1, characterised in that the presser (22, 27) is in a number of parts arranged consecutively over cloth width.
3. A device according to claim 1 or 2, characterised in that the presser (22) has a trough-shaped pressing surface adapted to the take-up roll (13).
4. A device according to claim 1 or 2 or 3, characterised in that the presser (22) has a deformable surface adaptable troughwise to the take-up roll.
5. A device according to claim 1, characterised in that the presser is a pressing roll (27) movable transversely to its axis relatively to the take-up roll (13).
6. A device according to claim 5, characterised in that an intermediate element (25, 26) is disposed between the pressing roll (27) and the hollow member (23).
7. A device according to claim 5 or 6, characterised in that the pressing roll (27) is supported on the intermediate element (25, 26) for rotation therein.
8. A device according to any of claims 5-7, characterised in that the pressing roll (27) is adapted to be driven at the peripheral velocity of the take-up roll (13).
9. A device according to any of claims 1-8, characterised in that the pressure of the pressure source (40) is controllable.
10. A device according to claim 9, characterised in that the pressure in the hollow member (23) can be controlled in dependence upon the warp tension of a loom.
11. A device according to any of claims 1-10, characterised in that the hollow member (23) is a pressure hose of elastic material.
12. A device according to any of claims 9-11, characterised in that the hollow member (23) comprises a chamber for liquid which is separated from the pressure source (40) by a resilient diaphragm.
EP86116346A 1985-12-06 1986-11-25 Draw-off device for the cloth in a textile machine Expired EP0224850B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH521385 1985-12-06
CH5213/85 1985-12-06

Publications (2)

Publication Number Publication Date
EP0224850A1 EP0224850A1 (en) 1987-06-10
EP0224850B1 true EP0224850B1 (en) 1989-07-26

Family

ID=4289836

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Application Number Title Priority Date Filing Date
EP86116346A Expired EP0224850B1 (en) 1985-12-06 1986-11-25 Draw-off device for the cloth in a textile machine

Country Status (7)

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US (1) US4722369A (en)
EP (1) EP0224850B1 (en)
JP (1) JPS62141156A (en)
BR (1) BR8605979A (en)
CS (1) CS888586A2 (en)
DE (1) DE3664648D1 (en)
SU (1) SU1524813A3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1001913A3 (en) * 1988-05-03 1990-04-10 Picanol Nv Device for discharging the fabric of looms.
KR950004158B1 (en) * 1990-12-26 1995-04-27 제일모직 주식회사 Fabric stand for weaving loom
DE59810158D1 (en) * 1998-02-19 2003-12-18 Sultex Ag Rueti Goods take-off device for a weaving machine and loom with a goods take-off device
CN102704183B (en) * 2011-03-26 2015-11-25 卡尔迈尔纺织机械制造有限公司 The device of the fabric web of the weaving of planar is drawn from weaving loom especially warp knitting machine
FR3048435B1 (en) * 2016-03-02 2018-04-06 Safran Aircraft Engines INSTALLATION AND METHOD FOR MANUFACTURING FIBROUS BAND-SHAPED TEXTURE HAVING IN THE CROSS-SECTIONAL SECTION AN EVOLVING PROFILE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE405991B (en) * 1973-05-22 1979-01-15 Jurgens Maschbau Gmbh & Co FABRIC DRAWER FOR WOVEN MACHINES
CH603860A5 (en) * 1976-09-21 1978-08-31 Saurer Ag Adolph
CH615644A5 (en) * 1978-01-19 1980-02-15 Sulzer Ag
IT1210942B (en) * 1982-10-01 1989-09-29 Omv Off Mecc Vilminore SYSTEM TO OBTAIN A DIFFERENTIATED MUTUAL PRESSURE IN THE CONTACT BETWEEN TWO CYLINDERS, IN PARTICULAR BETWEEN THE TAPE-BREAK CYLINDER AND THE PRESSURE BAR OF A WEAVING FRAME.
US4643232A (en) * 1985-12-13 1987-02-17 Wagner Theodor E Harness frame for a weaving loom

Also Published As

Publication number Publication date
CS888586A2 (en) 1989-06-13
SU1524813A3 (en) 1989-11-23
EP0224850A1 (en) 1987-06-10
BR8605979A (en) 1987-09-15
JPS62141156A (en) 1987-06-24
US4722369A (en) 1988-02-02
DE3664648D1 (en) 1989-08-31

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