EP0511939A1 - Pneumatic weft insertion device and a weaving machine with such a device - Google Patents

Pneumatic weft insertion device and a weaving machine with such a device Download PDF

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Publication number
EP0511939A1
EP0511939A1 EP92810247A EP92810247A EP0511939A1 EP 0511939 A1 EP0511939 A1 EP 0511939A1 EP 92810247 A EP92810247 A EP 92810247A EP 92810247 A EP92810247 A EP 92810247A EP 0511939 A1 EP0511939 A1 EP 0511939A1
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EP
European Patent Office
Prior art keywords
weft
thread
weft insertion
nozzle
clamping
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
EP92810247A
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German (de)
French (fr)
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EP0511939B1 (en
Inventor
Godert Dr. De Jager
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Itema Switzerland Ltd
Original Assignee
Sulzer AG
Sultex AG
Gebrueder Sulzer AG
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Publication date
Application filed by Sulzer AG, Sultex AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0511939A1 publication Critical patent/EP0511939A1/en
Application granted granted Critical
Publication of EP0511939B1 publication Critical patent/EP0511939B1/en
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    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34Handling the weft between bulk storage and weft-inserting means
    • D03D47/38Weft pattern mechanisms
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3066Control or handling of the weft at or after arrival
    • D03D47/308Stretching or holding the weft
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/125Weft holding devices

Definitions

  • the present invention relates to a device for inserting a weft into the shed of a weaving machine, according to the preamble of claim 1, and a weaving machine, in particular an air jet loom with a Profilriet weft insertion channel, with a thread stop arranged on the weft insertion side for braking the weft thread after insertion of a preselected one Length of weft thread in the shed and a thread holding device fastened in the area of the shed exit side together with the reed on the sley to take over the end of the weft after completion of the weft insertion.
  • CH 651 861 describes a thread holding device which, on the shed exit side, has a blow nozzle attached to the sley, acting transversely to the thread running direction, deflecting the weft thread end, and directed into a mixing tube, with which the weft thread reaches up to subsequent stops and change of subject is kept tense. This avoids jumping back into the shed.
  • the disadvantages of these blowing and / or suction nozzles - also known as stretching or tensioning nozzles - are in particular the high air consumption and the relatively high yarn waste.
  • the reason for the high air consumption is the relatively long holding time, i.e. the long blowing or suction duration to maintain the air flow until the weft thread is woven in and can no longer jump back into the shed.
  • the relatively large weft yarn waste arises from the necessity to exert a sufficiently large tensile force on the weft thread by means of the compressed or suction air flow, which is largely determined by the yarn surface exposed to the air flow.
  • the smoother e.g. the yarn surface or the thinner a yarn, the larger the excess yarn length and / or the level of air pressure must generally be selected.
  • the device according to the invention has the features of the characterizing part of claim 1.
  • the dependent claims relate to particularly advantageous developments of the invention, for example arranging the wedge-shaped thread clamping gap of the thread holding device essentially parallel to the direction of travel of the weft thread, or forming the thread clamping gap by at least one stationary and one movable clamping part, with mutually facing contours of the two clamping parts together the said clamping gap form.
  • the movable clamping part can be moved by an actuating device from a thread holding position into a thread release position, the edges forming the clamping gap being moved away from one another.
  • This actuating device is activated at the latest after the weft thread has been struck by means of the weaving reed on the fabric edge in order to release the weft thread in good time before the weaving shed retracts.
  • the actuator is e.g. from a housing located on the sley, with a piston movable therein via a membrane by compressed air, one end of which is directed against the movable clamping part.
  • an actuator consists of a fixed or movable part, e.g. a cam or a roller, which acts on the movable clamping part during the weft stop movement of the reed by enlarging the thread clamping gap and releasing the weft end.
  • a fixed or movable part e.g. a cam or a roller
  • the thread clamping device forming the thread clamping gap and the blowing or suction nozzle producing the air jet are arranged on the side of the path of the weft thread, the clamping parts forming the clamping gap preferably being either aligned essentially with the reed abutment plane and the nozzle opening being arranged on the fabric side, or conversely the nozzle opening is essentially also arranged aligned with the reed stop plane and the clamping parts forming the clamping gap are arranged on the fabric side.
  • the blowing or suction start, duration and pressure of the nozzle can be regulated automatically during machine operation, depending on the type of thread or weft color sequence. In multi-color weaving machines, this regulation is preferably carried out with the aid of the color selection and color control unit.
  • the weft insertion device has on the weft exit side of the shed a thread holding device for taking over and releasing the weft end, which essentially comprises two clamping parts and a nozzle.
  • the one clamping part is preferably stationary and the other clamping part is movable and together form a wedge-shaped clamping gap.
  • a blowing or suction nozzle sucks or blows the end of the weft end into the nip just as the weft insertion is finished.
  • the weft end When blowing or sucking in the weft end into the nip with the compressed air pulse from the blowing nozzle or the suction pulse with the suction nozzle, the weft end automatically jams or wedges as soon as the tensile force in the weft thread, which occurs when braking with the thread stopper in the weft thread on the weft insertion side builds up, becomes effective.
  • An actuating device acting on the movable clamping part releases the weft thread end during or after the weft thread is struck in the fabric.
  • the weft device enables a substantial reduction in air consumption and yarn waste.
  • Fig. 1 shows a fabric web 1, with the warp threads 2, 3 and weft threads 4, 4 '.
  • the weft insertion system comprises a weft insertion nozzle 5 for inserting a weft 4 into the shed 6, a reed 7 with profiled reed bars 8 for forming a guide channel 9 for the weft during insertion, as well as for striking the weft after it has entered the fabric edge 10, a thread stop 11 with an actuator 12, for braking a weft at the end of the insertion, and a thread holding device 13 according to the invention for holding the weft after completion of the weft insertion.
  • the weft insertion of the weft takes place, for example, with the help of the main nozzle 5 and any additional auxiliary nozzles, not shown here, arranged over the width of the shed.
  • the thread holding device 13 is on the sley 7 ', detachable with means not shown and slidably attached in the longitudinal direction of the reed 7.
  • the thread holding device 13 essentially comprises a carrier 14, which has a groove 15 in continuation of the reed channel 9. Furthermore, a stationary clamping part 16, a movable clamping part 17, a blowing nozzle 18 with compressed air connection 19 and an actuating device 20 with compressed air connection 21 are fastened on the carrier 14.
  • a lower edge 22 of the stationary clamping part 16 and an upper edge 23 of the movable clamping part 17 together form a wedge-shaped clamping gap 24. The position of the lower edge 22 can be changed by moving the clamping part 16 over e.g.
  • Fig. 1 shows the moment of completion of a weft insertion with the thread stopper 11 in the closed position.
  • the blowing nozzle 18 has deflected the weft end 4 ⁇ with a short blowing pulse from the flight path and blown into the clamping gap 24.
  • the weft thread is stretched and tensioned. Before the thread can snap back due to this tension, the thread end 4 ⁇ , as described above, must be steered through the blowing nozzle 18 into the clamping gap 24 and held there.
  • the blowing pulse for deflecting the thread end is advantageously timed when the thread clamp 11 is actuated.
  • Fig. 2 shows the essential parts of the thread holding device 13 in a side view looking towards the open shed, seen from the weft exit side.
  • the solid line shows the device in the rear position facing away from the fabric, specifically at the moment of deflecting the weft thread end 4endes into the thread clamping gap 24 with the blowing nozzle 18.
  • the actuating device 20 is in a retracted, inactive position.
  • the device is shown in dash-dotted lines in the tissue stop position.
  • the warp threads 2, 3 were crossed by a shed changing device, not shown, ie heald frames, and the lower clamping part 17 was moved by means of the actuating device 20 moved in the direction of arrow B into the open position 17 'to release the weft end 4'.
  • the weft thread 4 ' is now sufficiently secured by crossing the warp threads in its stretched position so that the weft thread end 4 ⁇ can be released.
  • the sley 7 ' with the thread holding device attached to it, now goes back to the starting position facing away from the fabric, while the actuating device 20 in the direction of arrow C. is moved and the resilient or spring-loaded lower clamping part 17 reaches the thread take-over position on the carrier 14 again. The next weft thread can now be pinched.
  • FIG. 3 shows part of the thread holding device 13 from FIG. 2 viewed in direction A.
  • the mutual position of the clamping parts 16, 17 and the blowing nozzle 18 of the thread holding device 13, which are important for the function of the thread holding device, and on the other hand the actuating device 20 are shown.
  • Fig. 4 shows a cross section along line IV - IV of the thread holding device of Fig. 3, wherein essential parts of the actuating device 20 are shown.
  • a piston 20 ' With a shaft part 27 of smaller diameter and a head part 28 of larger diameter.
  • the piston 20 ' is axially slidably guided in corresponding bores 29, 30 of the carrier 14.
  • the piston end with the small diameter is directed against the clamping part 17 and the piston end with the larger diameter is directed against the membrane 31.
  • the membrane 31 is attached to the carrier 14 together with the plate 32.
  • the outlet 34 opens into the space delimited by the membrane 31.
  • the carrier 14 is provided in the area between the head part 28 of the piston and the membrane with a conical recess 35.
  • the actuating device 20 works as follows: After a weft thread has been inserted into the shed, the thread end has been gripped by the thread holding device 13 and the weft thread has been struck against the fabric edge by the reed and at the same time upper and lower If the warp threads cross, the membrane 31 is pressurized with compressed air - indicated by the arrow P - via the compressed air connection 21. The piston 31 is axially displaced via the diaphragm 31, which moves against the depression 35, and presses with the end of the shaft part against the clamping part 17. This opens or extends the clamping gap of the thread holding device 13 and releases the thread end 4 ⁇ , as is the case here is shown in broken lines in Fig. 2.
  • FIG. 5 schematically illustrates a thread holding device in which the blowing nozzle 18 and the actuating device 20 are each immersed in an alley between two reed bars 8.
  • This embodiment of the thread holding device has the advantage that it can be used in a variety of ways regardless of the reed feed width.
  • This solution only requires a suitable reed division, reed rod thickness, and suitable mass of the nozzle 18 and the actuating device 20. 5, the position of the clamping parts 16, 17 is indicated by dash-dotted lines.
  • FIGS. 6 and 7 show a modified thread holding device 40, in which the clamping parts 24 forming clamping parts 41, 42 are substantially in a common plane with the thread guide channel base 9 'and the blowing nozzle 43 blows in the direction facing away from the fabric to the thread end 4 ⁇ to bring into the holding position of the thread holding device 40.
  • the upper, stationary clamping part 41 can be produced, for example, as a sheet metal part and shaped to match the reed profile, so that the weft thread end is directed as undisturbed as possible by the air jet from the blowing nozzle 43 into the wedge gap.
  • the warp direction behind the nip is preferably also on the sley 7 'attached, curved Pipe 44 arranged. Such a tube is used to remove parts of broken weft threads.
  • weft monitors can be arranged which, for example in the case of incorrect weft yarn length or a weft yarn break, emit a signal to the weaving machine control which, for example, causes the weft yarn length to be changed or the weaving machine to stop in the event of a weft yarn break.
  • Fig. 7 is further dash-dotted line, the actuator 20, with the lower clamping part 42 'shown in the open position.
  • Fig. 8 finally shows a further variant of a thread holding device 50, which is attached to the sley 7 '.
  • the lower clamping part 51 is provided with a rotary bearing 52 which is supported on the reed by a support 53.
  • the clamping part On the side of the pivot bearing 52 facing away from the sley, the clamping part is provided with a lever 54.
  • This lever extension 54 is deflected by the reed 7 with the cam 55 at the weft stop.
  • a spring 56 causes the clamping part 51 to be reset up to the stop 57 of the support 53 as soon as the reed returns to the open shed position.
  • the jet of the nozzle is shown in the drawings largely almost parallel to the course of the warp threads, the clamping gap practically parallel to the course of the weft threads and the clamping parts approximately perpendicular to the warp thread family, the invention is of course not restricted to this advantageous arrangement of the parts of the thread holding device.
  • the suction or blowing jet of the nozzle but also the clamping gap and clamping parts, inclined to the weft direction and / or the warp direction.

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

Abstract

The weft-insertion device has, on the weft exit side of the shed (6), a yarn-holding device (13) for receiving and releasing the weft end (4''), which device essentially comprises two clamping parts (16, 17) and a nozzle (18). Preferably, one clamping part (16) is stationary and the other clamping part (17) movable and together they form a wedge-shaped nip (24). A blowing or suction nozzle (18) sucks or blows the end (4'') of the weft end into the nip (24) at the moment when the weft insertion is completed. During the blowing or suction of the weft end (4'') into the nip (24) by means of the compressed-air pulse of the blowing nozzle (18) or the suction pulse by means of the suction nozzle, the weft end (4'') is automatically jammed or wedged as soon as the tensile force in the weft yarn (4), which builds up in the weft yarn during braking by means of the yarn stop (11) mounted on the weft-insertion side, takes effect. An actuating device (20) acting on the movable clamping part (17) releases the weft end again during or after the beating up of the weft yarn (4') in the fabric (10). The weft device makes it possible to achieve a substantial reduction in the air consumption and yarn waste. <IMAGE>

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zum Eintragen eines Schussfadens in das Webfach einer Webmaschine, nach dem Oberbegriff von Anspruch 1, sowie eine Webmaschine, insbesondere eine Luftdüsenwebmaschine mit Profilriet-Schusseintragskanal, mit einem auf der Schussfadeneintragsseite angeordneten Fadenstopper zum Abbremsen des Schussfadens nach Eintrag einer vorgewählten Schussfadenlänge in das Webfach und einer im Bereich der Webfachaustrittsseite zusammen mit dem Webblatt auf der Weblade befestigten Fadenhaltevorrichtung zur Übernahme des Schussfadenendes nach Vollendung des Schussfadeneintrags.The present invention relates to a device for inserting a weft into the shed of a weaving machine, according to the preamble of claim 1, and a weaving machine, in particular an air jet loom with a Profilriet weft insertion channel, with a thread stop arranged on the weft insertion side for braking the weft thread after insertion of a preselected one Length of weft thread in the shed and a thread holding device fastened in the area of the shed exit side together with the reed on the sley to take over the end of the weft after completion of the weft insertion.

CH 651 861 beschreibt eine Fadenhaltevorrichtung, die an der Webfachaustrittsseite eine auf der Weblade befestigte, quer zur Fadenlaufrichtung wirkende, das Schussfadenende umlenkende, in ein Mischrohr gerichtete Blasdüse aufweist, mit welcher der Schussfaden bis zum anschliessenden Anschlagen und Fachwechsel gespannt gehalten wird. Damit wird ein Zurückspringen in das Webfach vermieden. Die Nachteile dieser Blas- und/oder Saugdüsen - auch als Streck bzw. Spanndüsen bekannt - sind insbesondere der hohe Luftverbrauch, sowie der relativ hohe Garnabfall.CH 651 861 describes a thread holding device which, on the shed exit side, has a blow nozzle attached to the sley, acting transversely to the thread running direction, deflecting the weft thread end, and directed into a mixing tube, with which the weft thread reaches up to subsequent stops and change of subject is kept tense. This avoids jumping back into the shed. The disadvantages of these blowing and / or suction nozzles - also known as stretching or tensioning nozzles - are in particular the high air consumption and the relatively high yarn waste.

Grund für den hohen Luftverbrauch ist die relativ lange Haltezeit, d.h. die lange Blas- oder Saugdauer zum Aufrechterhalten des Luftstromes, bis der Schussfaden eingewoben ist und nicht mehr zurück ins Webfach springen kann. Der relativ grosse Schussgarnabfall entsteht aus der Notwendigkeit, durch den Druck- bzw. Saugluftstrom eine ausreichend grosse Zugkraft auf den Schussfaden auszuüben, was wesentlich durch die dem Luftstrom ausgesetzte Garnoberfläche mitbestimmt wird. Je glatter z.B. die Garnoberfläche bzw. je dünner ein Garn ist, desto grösser muss in der Regel die Garnüberlänge und/oder die Höhe des Luftdruckes gewählt werden.The reason for the high air consumption is the relatively long holding time, i.e. the long blowing or suction duration to maintain the air flow until the weft thread is woven in and can no longer jump back into the shed. The relatively large weft yarn waste arises from the necessity to exert a sufficiently large tensile force on the weft thread by means of the compressed or suction air flow, which is largely determined by the yarn surface exposed to the air flow. The smoother e.g. the yarn surface or the thinner a yarn, the larger the excess yarn length and / or the level of air pressure must generally be selected.

Es ist die Aufgabe der Erfindung, eine Fadenhaltevorrichtung, zu schaffen, welche, weitgehend unabhängig von der jeweils verarbeiteten Schussgarnart, gleiche und gegenüber bekannten Vorrichtungen geringere Garnüberlängen und weniger Blas- oder Saugluft erfordert.It is the object of the invention to provide a thread holding device which, largely independently of the type of weft yarn processed in each case, requires the same excess length of yarn and less blowing or suction air than known devices.

Die erfindungsgemässe Vorrichtung weist die Merkmale des kennzeichnenden Teils von Anspruch 1 auf. Die abhängigen Ansprüche betreffen besonders vorteilhafte Weiterbildungen der Erfindung, beispielsweise das im wesentlichen zur Laufrichtung des Schussfades parallele Anordnen des keilförmigen Fadenklemmspaltes der Fadenhaltevorrichtung oder das Bilden des Fadenklemmspalte durch mindestens einen stationären und einen bewegbaren Klemmteil, wobei einander zugewandte Konturen der beiden Klemmteile zusammen den genannten Klemmspalt bilden.The device according to the invention has the features of the characterizing part of claim 1. The dependent claims relate to particularly advantageous developments of the invention, for example arranging the wedge-shaped thread clamping gap of the thread holding device essentially parallel to the direction of travel of the weft thread, or forming the thread clamping gap by at least one stationary and one movable clamping part, with mutually facing contours of the two clamping parts together the said clamping gap form.

Ferner kann der bewegbare Klemmteil durch eine Betätigungsvorrichtung aus einer Fadenhalteposition in eine Fadenfreigabepostion bewegt werden, wobei die den Klemmspalt bildenden Kanten voneinander wegbewegt werden. Diese Betätigungsvorrichtung wird spätestens nach dem Anschlagen des Schussfadens mittels des Webblattes an den Geweberand aktiviert, um den Schussfaden rechtzeitig vor Rückgang der Weblade freizugeben. Die Betätigungsvorrichtung besteht z.B. aus einem sich auf der Weblade befindlichen Gehäuse, mit einem darin über eine Membrane durch Druckluft bewegbaren Kolben, dessen eines Ende gegen den beweglichen Klemmteil gerichtet ist.Furthermore, the movable clamping part can be moved by an actuating device from a thread holding position into a thread release position, the edges forming the clamping gap being moved away from one another. This actuating device is activated at the latest after the weft thread has been struck by means of the weaving reed on the fabric edge in order to release the weft thread in good time before the weaving shed retracts. The actuator is e.g. from a housing located on the sley, with a piston movable therein via a membrane by compressed air, one end of which is directed against the movable clamping part.

Eine andere Ausführung einer Betätigungsvorrichtung besteht aus einem festen oder beweglichen Teil, z.B. einem Nocken oder einer Rolle, welcher während der Schussfadenanschlagbewegung des Webblattes auf den bewegbaren Klemmteil einwirkt, indem der Fadenklemmspalt vergrössert und das Schussfadenende freigegeben wird. Die den Fadenklemmspalt bildende Fadenklemmvorrichtung und die den Luftstrahl erzeugende Blas- bzw. Saugdüse sind seitlich der Durchlaufbahn des Schussfadens angeordnet, wobei die den Klemmspalt bildenden Klemmteile vorzugsweise entweder im wesentlichen mit der Webblattanschlagebene fluchtend und die Düsenöffnung gewebeseitig angeordnet sind oder umgekehrt die Düsenöffnung im wesentlichen mit der Webblattanschlagebene fluchtend und die den Klemmspalt bildenden Klemmteile gewebeseitig angeordnet sind.Another embodiment of an actuator consists of a fixed or movable part, e.g. a cam or a roller, which acts on the movable clamping part during the weft stop movement of the reed by enlarging the thread clamping gap and releasing the weft end. The thread clamping device forming the thread clamping gap and the blowing or suction nozzle producing the air jet are arranged on the side of the path of the weft thread, the clamping parts forming the clamping gap preferably being either aligned essentially with the reed abutment plane and the nozzle opening being arranged on the fabric side, or conversely the nozzle opening is essentially also arranged aligned with the reed stop plane and the clamping parts forming the clamping gap are arranged on the fabric side.

Blas- bzw. Saug-Beginn, -Dauer und -Druck der Düse können im Betrieb der Maschinen, abhängig von der Garnart bzw. Schussfarbfolge, automatisch regelbar sein. Bei Mehrfarbenwebmaschinen erfolgt diese Regelung vorzugsweise mit Hilfe des Farbwahl- und Farbsteuer-Aggregats.The blowing or suction start, duration and pressure of the nozzle can be regulated automatically during machine operation, depending on the type of thread or weft color sequence. In multi-color weaving machines, this regulation is preferably carried out with the aid of the color selection and color control unit.

Die Schussfaden-Eintragsvorrichtung weist auf der Schuss-Austritts-Seite des Webfachs eine Fadenhaltevorrichtung zur Übernahme und Freigabe des Schussfadenendes auf, die im wesentlichen zwei Klemmteile und eine Düse umfasst. Vorzugsweise ist der eine Klemmteil stationär und der andere Klemmteil bewegbar und bilden zusammen einen keilförmigen Klemmspalt. Eine Blas- oder Saugdüse saugt oder bläst das Ende des Schussfadenendes im Moment, da der Schusseintrag beendet ist, in den Klemmspalt. Beim Einblasen bzw. Einsaugen des Schussfadenendes in den Klemmspalt mit dem Druckluftimpuls der Blasdüse, bzw dem Saugimpuls mit der Saugdüse, verklemmt oder verkeilt sich das Schussfadenende selbsttätig, sobald die Zugspannungskraft im Schussfaden, die sich beim Abbremsen mit dem auf der Schussfadeneintragsseite angebrachten Fadenstopper im Schussfaden aufbaut, wirksam wird. Eine auf den beweglichen Klemmteil wirkende Betätigungsvorrichtung setzt das Schussfadenende während bzw. nach dem Anschlagen des Schussfadens im Gewebe wieder frei. Die Schussfaden-Vorrichtung ermöglicht eine wesentliche Reduktion des Luftverbrauchs und Garnabfalls.The weft insertion device has on the weft exit side of the shed a thread holding device for taking over and releasing the weft end, which essentially comprises two clamping parts and a nozzle. The one clamping part is preferably stationary and the other clamping part is movable and together form a wedge-shaped clamping gap. A blowing or suction nozzle sucks or blows the end of the weft end into the nip just as the weft insertion is finished. When blowing or sucking in the weft end into the nip with the compressed air pulse from the blowing nozzle or the suction pulse with the suction nozzle, the weft end automatically jams or wedges as soon as the tensile force in the weft thread, which occurs when braking with the thread stopper in the weft thread on the weft insertion side builds up, becomes effective. An actuating device acting on the movable clamping part releases the weft thread end during or after the weft thread is struck in the fabric. The weft device enables a substantial reduction in air consumption and yarn waste.

Nachstehend wird die Erfindung anhand der Figuren, welche schematisch ein Schusseintragssystem mit Klemme und Teile davon zeigen, näher beschrieben. Obschon die gezeigten Beispiele sich durchwegs auf Fadenhaltevorrichtung mit Blasdüsen beziehen, ist es natürlich für den Fachmann unmittelbar verständlich, dass das Schussfadenende auch mit einer Saugdüse in den Klemmspalt gesaugt werden kann und welche technischen und konstruktiven Massnahmen bei einer derartigen Ausführungsform der Erfindung zu treffen sind.The invention is described in more detail below with reference to the figures, which schematically show a weft insertion system with a clamp and parts thereof. Although the examples shown all relate to thread holding device with blowing nozzles, it is of course immediately understandable for the person skilled in the art that the weft thread end can also be sucked into the clamping gap with a suction nozzle and which technical and constructive measures have to be taken in such an embodiment of the invention.

Es zeigen:Show it:

  • Fig. 1 eine perspektivische Darstellung einer erfindungsgemässen Fadenhaltevorrichtung;Fig. 1 is a perspective view of a thread holding device according to the invention;
  • Fig. 2 eine Seitenansicht der wesentlichen Funktionsteile der Vorrichtung in zwei verschiedenen Wirkstellungen;2 shows a side view of the essential functional parts of the device in two different operative positions;
  • Fig. 3 eine Teilansicht gemäss Fig. 2 in Pfeilrichtung A betrachtet;3 is a partial view according to FIG. 2 viewed in the direction of arrow A;
  • Fig. 4 eine Schnittdarstellung nach Linie IV - IV von Fig. 3 einer Betätigungsvorrichtung der erfindungsgemässen Fadenhaltevorrichtung;4 shows a sectional illustration along line IV-IV of FIG. 3 of an actuating device of the thread holding device according to the invention;
  • Fig. 5 eine Anordnung einer Blasdüse und Betätigungsvorrichtung bezüglich des Webblattes und der Fadenhaltevorrichtung;5 shows an arrangement of a blowing nozzle and actuating device with respect to the reed and the thread holding device;
  • Fig. 6 eine perspektivische Darstellung einer modifizierten Ausführungsart der erfindungsgemässen Fadenhaltevorrichtung;6 shows a perspective illustration of a modified embodiment of the thread holding device according to the invention;
  • Fig. 7 eine Ansicht in Richtung D der Ausführungsart nach Fig. 6;Fig. 7 is a view in direction D of the embodiment of Fig. 6;
  • Fig. 8 eine perspektivische Darstellung einer weiteren Ausführungsart.Fig. 8 is a perspective view of another embodiment.

Fig. 1 zeigt eine Gewebebahn 1, mit den Kettfäden 2, 3 und Schussfäden 4, 4′. Das Schusseintragssystem umfasst eine Schussfadeneintragsdüse 5 zum Einbringen eines Schussfadens 4 in das Webfach 6, ein Webblatt 7 mit profilierten Rietstäben 8 zur Bildung eines Führungskanals 9 für den Schussfaden während des Eintragens, sowie zum Anschlagen des Schussfadens nach dessen Eintrag an den Geweberand 10, einen Fadenstopper 11 mit einem Stellglied 12, zum Abbremsen eines Schussfadens bei Eintragsende, sowie eine erfindungsgemässe Fadenhaltevorrichtung 13 zum Festhalten des Schussfadens nach Vollendung des Schussfadeneintrags. Der Schusseintrag des Schussfadens erfolgt z.B. mit Hilfe Hauptdüse 5 und eventuellen zusätzlichen, hier nicht gezeigten, über die Breite des Webfaches angeordneten Hilfsdüsen.Fig. 1 shows a fabric web 1, with the warp threads 2, 3 and weft threads 4, 4 '. The weft insertion system comprises a weft insertion nozzle 5 for inserting a weft 4 into the shed 6, a reed 7 with profiled reed bars 8 for forming a guide channel 9 for the weft during insertion, as well as for striking the weft after it has entered the fabric edge 10, a thread stop 11 with an actuator 12, for braking a weft at the end of the insertion, and a thread holding device 13 according to the invention for holding the weft after completion of the weft insertion. The weft insertion of the weft takes place, for example, with the help of the main nozzle 5 and any additional auxiliary nozzles, not shown here, arranged over the width of the shed.

Die Fadenhaltevorrichtung 13 ist auf der Weblade 7′, mit nicht dargestellten Mitteln lösbar und in Längsrichtung des Webblattes 7 verschiebbar befestigt. Im wesentlichen umfasst die Fadenhaltevorrichtung 13 einen Träger 14, welcher in Fortsetzung des Rietkanals 9 eine Nut 15 aufweist. Weiter ist auf dem Träger 14 ein stationärer Klemmteil 16, ein bewegbarer Klemmteil 17, eine Blasdüse 18 mit Druckluftanschluss 19 und eine Betätigungseinrichtung 20 mit Druckluftanschluss 21 befestigt. Eine untere Kante 22 des stationären Klemmteils 16 und eine obere Kante 23 des bewegbaren Klemmteils 17, bilden zusammen einen keilförmigen Klemmspalt 24. Die Lage der unteren Kante 22 lässt sich durch Verschieben des Klemmteils 16 über z.B. das Langloch 25 nach Lösen von Befestigungsschrauben 26, gegenüber der Oberkante 23 des unteren Klemmteils verändern, womit eine Einstellmöglichkeit zur Aufnahme von Garnen verschiedener Nummern, d.h. verschiedener Dicke besteht. Mit der strichpunktiert dargestellten Lage des unteren Klemmteils 17′ wird dieser in geöffneter Position dargestellt.The thread holding device 13 is on the sley 7 ', detachable with means not shown and slidably attached in the longitudinal direction of the reed 7. The thread holding device 13 essentially comprises a carrier 14, which has a groove 15 in continuation of the reed channel 9. Furthermore, a stationary clamping part 16, a movable clamping part 17, a blowing nozzle 18 with compressed air connection 19 and an actuating device 20 with compressed air connection 21 are fastened on the carrier 14. A lower edge 22 of the stationary clamping part 16 and an upper edge 23 of the movable clamping part 17 together form a wedge-shaped clamping gap 24. The position of the lower edge 22 can be changed by moving the clamping part 16 over e.g. change the elongated hole 25 after loosening the fastening screws 26, relative to the upper edge 23 of the lower clamping part, so that an adjustment possibility for receiving yarns of different numbers, i.e. of different thickness. With the dot-dash position of the lower clamping part 17 ', this is shown in the open position.

Die Fig. 1 zeigt den Moment der Vollendung eines Schusseintrages mit dem Fadenstopper 11 in Schliessstellung. Die Blasdüse 18 hat das Schussfadenende 4˝ mit einem kurzen Blasimpuls aus der Flugbahn abgelenkt und in den Klemmspalt 24 geblasen. Beim Abbremsen des Schussfadens mit der einschussseitig angeordneten Fadenklemme in der Endphase des Schusseintrags wird der Schussfaden gestreckt und gespannt. Bevor der Faden durch diese Spannung zurückschnellen kann, muss das Fadenende 4˝, wie oben beschrieben, durch die Blasdüse 18 in den Klemmspalt 24 gelenkt und dort festgehalten werde. Schon in der Anfangssphase des Zurückziehens verklemmt oder verkeilt sich das Fadenende im Klemmspalt 24, ohne dass und bevor der gespannte und gestreckte Faden in das noch geöffnete Webfach zurückspringen kann. Der Blasimpuls für das Umlenken des Fadenendes erfolgt mit Vorteil zeitlich abgestimmt mit der Betätigung des Fadenklemme 11.Fig. 1 shows the moment of completion of a weft insertion with the thread stopper 11 in the closed position. The blowing nozzle 18 has deflected the weft end 4˝ with a short blowing pulse from the flight path and blown into the clamping gap 24. When braking the weft With the thread clamp arranged on the weft side in the final phase of the weft insertion, the weft thread is stretched and tensioned. Before the thread can snap back due to this tension, the thread end 4˝, as described above, must be steered through the blowing nozzle 18 into the clamping gap 24 and held there. Already in the initial phase of pulling back, the thread end jams or wedges in the clamping gap 24 without and before the tensioned and stretched thread can spring back into the still open shed. The blowing pulse for deflecting the thread end is advantageously timed when the thread clamp 11 is actuated.

Fig. 2 zeigt die wesentlichen Teile der Fadenhaltevorrichtung 13 in einer Seitenansicht mit Blick in Richtung auf das geöffnete Webfach, von der Schussaustrittsseite aus gesehen. Mit ausgezogener Linien ist die Vorrichtung in der vom Gewebe abgewandten, hinteren Stellung zu sehen, und zwar im Moment der Umlenkung des Schussfadenendes 4˝ in den Fadenklemmspalt 24 mit der Blasdüse 18. Die Betätigungsvorrichtung 20 ist in einer zurückgezogenen, nichtwirksamen Position.Fig. 2 shows the essential parts of the thread holding device 13 in a side view looking towards the open shed, seen from the weft exit side. The solid line shows the device in the rear position facing away from the fabric, specifically at the moment of deflecting the weft thread end 4endes into the thread clamping gap 24 with the blowing nozzle 18. The actuating device 20 is in a retracted, inactive position.

Strichpunktiert ist die Vorrichtung in Gewebeanschlagposition gezeigt. Die Kettfäden 2, 3 wurden durch eine nicht dargestellte Fachwechseleinrichtung, d.h. Webschäfte, verkreuzt und der untere Klemmteil 17 mittels der in Pfeilrichtung B bewegten Betätigungsvorrichtung 20 in die geöffnete Lage 17′ zur Freigabe des Schussfadenendes 4˝ bewegt. In dieser Schussanschlagstellung ist nun der Schussfaden 4′ durch die Verkreuzung der Kettfäden in seiner Strecklage genügend gesichert, so dass die Freigabe des Schussfadenendes 4˝ erfolgen kann. Die Weblade 7′, mit darauf befestigter Fadenhaltevorrichtung, geht nun in die gewebeabgewandte Ausgangsstellung zurück, während die Betätigungsvorrichtung 20 in Pfeilrichtung C bewegt wird und der federnde oder gefederte untere Klemmteil 17 wieder zur Fadenübernahmestellung am Träger 14 gelangt. Jetzt kann der nächste Schussfaden geklemmt werden.The device is shown in dash-dotted lines in the tissue stop position. The warp threads 2, 3 were crossed by a shed changing device, not shown, ie heald frames, and the lower clamping part 17 was moved by means of the actuating device 20 moved in the direction of arrow B into the open position 17 'to release the weft end 4'. In this weft stop position, the weft thread 4 'is now sufficiently secured by crossing the warp threads in its stretched position so that the weft thread end 4˝ can be released. The sley 7 ', with the thread holding device attached to it, now goes back to the starting position facing away from the fabric, while the actuating device 20 in the direction of arrow C. is moved and the resilient or spring-loaded lower clamping part 17 reaches the thread take-over position on the carrier 14 again. The next weft thread can now be pinched.

Fig. 3 zeigt einen Teil der Fadenhaltevorrichtung 13 von Fig 2 in Richtung A betrachtet. Insbesondere wird die gegenseitige Lage der für die Funktion der Fadenhaltevorrichtung wichtigen Klemmteile 16, 17 und der Blasdüse 18 der Fadenhaltevorrichtung 13 einerseits sowie anderseits der Betätigungsvorrichtung 20 gezeigt.FIG. 3 shows part of the thread holding device 13 from FIG. 2 viewed in direction A. In particular, the mutual position of the clamping parts 16, 17 and the blowing nozzle 18 of the thread holding device 13, which are important for the function of the thread holding device, and on the other hand the actuating device 20 are shown.

Fig. 4 zeigt einen Querschnitt nach Linie IV - IV der Fadenhaltevorichtung von Fig. 3, wobei wesentliche Teile der Betätigungsvorrichtung 20 dargestellt sind. Es sind dies ein Kolben 20′ mit einem Schaftteil 27 kleineren Durchmessers und einem Kopfteil 28 grösseren Durchmessers. Der Kolben 20′ ist in entsprechenden Bohrungen 29, 30 des Trägers 14 axial verschiebbar geführt. Das Kolbenende mit kleinem Durchmesser ist gegen den Klemmteil 17 und das Kolbenende mit dem grösseren Durchmesser ist gegen die Membrane 31 gerichtet. Die Membrane 31 ist zusammen mit der Platte 32 am Träger 14 befestigt. Im Zentrum der Platte 32 befindet sich, fluchtend mit der Mittelachse 33 des Kolbens 20′, der Druckluftanschluss 21, dessen Ausgang 34 in den durch die Membrane 31 begrenzten Raum mündet. Der Träger 14 ist im Bereich zwischen dem Kopfteil 28 des Kolbens und der Membrane mit einer kegelförmigen Vertiefung 35 versehen.Fig. 4 shows a cross section along line IV - IV of the thread holding device of Fig. 3, wherein essential parts of the actuating device 20 are shown. There are a piston 20 'with a shaft part 27 of smaller diameter and a head part 28 of larger diameter. The piston 20 'is axially slidably guided in corresponding bores 29, 30 of the carrier 14. The piston end with the small diameter is directed against the clamping part 17 and the piston end with the larger diameter is directed against the membrane 31. The membrane 31 is attached to the carrier 14 together with the plate 32. In the center of the plate 32 is, aligned with the central axis 33 of the piston 20 ', the compressed air connection 21, the outlet 34 opens into the space delimited by the membrane 31. The carrier 14 is provided in the area between the head part 28 of the piston and the membrane with a conical recess 35.

Die Betätigungsvorrichtung 20 funktioniert wie folgt:
   Nachdem ein Schussfaden ins Webfach eingetragen, das Fadenende durch die Fadenhaltevorrichtung 13 erfasst und der Schussfaden durch das Webblatt an den Geweberand angeschlagen wurde und gleichzeitig obere und untere Kettfäden sich verkreuzen, wird über den Druckluftanschluss 21 die Membrane 31 mit Druckluft - angedeutet mit dem Pfeil P - beaufschlagt. Dabei wird via die Membrane 31, welche sich gegen die Vertiefung 35 bewegt, der Kolben axial verschoben und drückt mit dem Schaftteilende gegen den Klemmteil 17. Dadurch öffnet bzw. erweitert sich der Klemmspalt der Fadenhaltevorrichtung 13 und gibt das Fadenende 4˝ frei, wie dies in Fig. 2 strichpunktiert dargestellt ist.
The actuating device 20 works as follows:
After a weft thread has been inserted into the shed, the thread end has been gripped by the thread holding device 13 and the weft thread has been struck against the fabric edge by the reed and at the same time upper and lower If the warp threads cross, the membrane 31 is pressurized with compressed air - indicated by the arrow P - via the compressed air connection 21. The piston 31 is axially displaced via the diaphragm 31, which moves against the depression 35, and presses with the end of the shaft part against the clamping part 17. This opens or extends the clamping gap of the thread holding device 13 and releases the thread end 4˝, as is the case here is shown in broken lines in Fig. 2.

Fig. 5 illustriert schematisiert eine Fadenhaltevorrichtung, bei welcher die Blasdüse 18 und die Betätigungsvorrichtung 20 jeweils in eine Gasse zwischen zwei Rietstäben 8 eintauchen. Diese Ausführungsart der Fadenhaltevorrichtung hat den Vorteil, dass sie unabhängig von der Webblatteinzugsbreite vielseitig einsetzbar ist. Diese Lösung setzt bloss eine passende Webblatteilung, Rietstabdicke, sowie passende Masse der Düse 18 und der Betätigungsvorrichtung 20 voraus. In der Darstellung nach Fig. 5 ist die Lage der Klemmteile 16, 17 strichpunktiert angedeutet.5 schematically illustrates a thread holding device in which the blowing nozzle 18 and the actuating device 20 are each immersed in an alley between two reed bars 8. This embodiment of the thread holding device has the advantage that it can be used in a variety of ways regardless of the reed feed width. This solution only requires a suitable reed division, reed rod thickness, and suitable mass of the nozzle 18 and the actuating device 20. 5, the position of the clamping parts 16, 17 is indicated by dash-dotted lines.

Fig. 6 und 7 zeigen eine modifizierte Fadenhaltevorrichtung 40, bei der die den Klemmspalt 24 bildenden Klemmteile 41, 42 im wesentlichen in einer gemeinsamen Ebene mit dem Fadenführungskanalgrund 9′ liegen und die Blasdüse 43 in die, der Gewebeseite abgewandte Richtung bläst, um das Fadenende 4˝ in die Halteposition der Fadenhaltevorrichtung 40 zu bringen.6 and 7 show a modified thread holding device 40, in which the clamping parts 24 forming clamping parts 41, 42 are substantially in a common plane with the thread guide channel base 9 'and the blowing nozzle 43 blows in the direction facing away from the fabric to the thread end 4˝ to bring into the holding position of the thread holding device 40.

Der obere, stationäre Klemmteil 41 kann z.B. als Blechteil hergestellt und dem Rietprofil angepasst geformt sein, damit das Schussfadenende möglichst ungestört, vom Luftstrahl der Blasdüse 43 in den Keilspalt gelenkt wird. In Kettrichtung hinter dem Klemmspalt ist vorzugsweise ein ebenfalls auf der Weblade 7′ befestigtes, gekrümmtes Rohr 44 angeordnet. Ein solches Rohr dient dem Abführen von Teilen gebrochener Schussfäden. In einem solchen, hier nicht gezeigten Rohr können Schussfadenwächter angeordnet sein die, z.B. bei falscher Schussgarnlänge oder einem Schussfadenbruch, ein Signal an die Webmaschinensteuerung abgeben, das beispielsweise bewirkt, dass die Schussgarnlänge geändert wird oder bei einem Schussfadenbruch die Webmaschine stillsetzt. In Fig. 7 ist ferner strichpunktiert die Betätigungsvorrichtung 20, mit dem unteren Klemmteil 42′ in Offenstellung dargestellt.The upper, stationary clamping part 41 can be produced, for example, as a sheet metal part and shaped to match the reed profile, so that the weft thread end is directed as undisturbed as possible by the air jet from the blowing nozzle 43 into the wedge gap. In the warp direction behind the nip is preferably also on the sley 7 'attached, curved Pipe 44 arranged. Such a tube is used to remove parts of broken weft threads. In such a tube, not shown here, weft monitors can be arranged which, for example in the case of incorrect weft yarn length or a weft yarn break, emit a signal to the weaving machine control which, for example, causes the weft yarn length to be changed or the weaving machine to stop in the event of a weft yarn break. In Fig. 7 is further dash-dotted line, the actuator 20, with the lower clamping part 42 'shown in the open position.

Fig. 8 schliesslich zeigt eine weitere Variante einer Fadenhaltevorrichtung 50, die auf der Weblade 7′ befestigt ist. Im Unterschied zu den oben beschriebenen Fadenhaltevorrichtungen, ist hier der untere Klemmteil 51 mit einem Drehlager 52 versehen, welches über einen Träger 53 am Webblatt abgestützt ist. Auf der der Weblade abgekehrten Seite des Drehlagers 52 ist der Klemmteil mit einem Hebel 54 versehen. Diese Hebelverlängerung 54 wird beim Schussanschlag durch das Webblatt 7 mit dem Nocken 55 ausgelenkt. Eine Feder 56 bewirkt das Rückstellen des Klemmteils 51 bis zum Anschlag 57 des Trägers 53, sobald das Webblatt in die Offenfachstellung zurückgeht.Fig. 8 finally shows a further variant of a thread holding device 50, which is attached to the sley 7 '. In contrast to the thread holding devices described above, here the lower clamping part 51 is provided with a rotary bearing 52 which is supported on the reed by a support 53. On the side of the pivot bearing 52 facing away from the sley, the clamping part is provided with a lever 54. This lever extension 54 is deflected by the reed 7 with the cam 55 at the weft stop. A spring 56 causes the clamping part 51 to be reset up to the stop 57 of the support 53 as soon as the reed returns to the open shed position.

Obschon der Strahl der Düse in den Zeichnungen weitgehend fast parallel zum Verlauf der Kettfäden, der Klemmspalt praktisch parallel zum Verlauf der Schussfäden und die Klemmteile ungefähr senkrecht auf der Kettfadenschar dargestellt sind, bleibt die Erfindung natürlich nicht auf diese vorteilhafte Anordnung der Teile der Fadenhaltevorrichtung beschränkt. So ist es beispielsweise denkbar, den Saug- bzw. Blas-Strahl der Düse, aber auch Klemmspalt und Klemmteile zur Schussrichtung und/oder zur Kettrichtung geneigt anzuordnen.Although the jet of the nozzle is shown in the drawings largely almost parallel to the course of the warp threads, the clamping gap practically parallel to the course of the weft threads and the clamping parts approximately perpendicular to the warp thread family, the invention is of course not restricted to this advantageous arrangement of the parts of the thread holding device. For example, it is conceivable to arrange the suction or blowing jet of the nozzle, but also the clamping gap and clamping parts, inclined to the weft direction and / or the warp direction.

Claims (10)

Pneumatische Schussfaden-Eintragsvorrichtung für eine Webmaschine mit einer Fadenhaltevorrichtung auf der Einschusseite (11) und auf der Austrittsseite (13) des Webfachs (6), dadurch gekennzeichnet, dass die Fadenhaltevorrichtung (13) auf der Austrittsseite einen Fadenklemmspalt (24) und eine Blas- oder Saugdüse (18) aufweist, mit welcher das aus dem Webfach (6) austretende Ende des Schussfadens (4) in den Fadenklemmspalt (24) geblasen oder gesogen wird.Pneumatic weft insertion device for a loom with a thread holding device on the weft side (11) and on the exit side (13) of the shed (6), characterized in that the thread holding device (13) on the exit side has a thread clamping gap (24) and a blow or has a suction nozzle (18) with which the end of the weft thread (4) emerging from the shed (6) is blown or sucked into the thread clamping gap (24). Schussfaden-Eintragsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Fadenklemmspalt (24) der Fadenhaltevorrichtung (13) im wesentlichen parallel zu den Schussfäden (4) ausgerichtet ist.Weft insertion device according to claim 1, characterized in that the thread clamping gap (24) of the thread holding device (13) is aligned substantially parallel to the weft threads (4). Schussfaden-Eintragsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Fadenklemmspalt (24) durch mindestens einen feststehenden (16) und mindestens einen bewegbaren (17) Klemmteil gebildet ist.Weft insertion device according to claim 1 or 2, characterized in that the thread clamping gap (24) is formed by at least one fixed (16) and at least one movable (17) clamping part. Schussfaden-Eintragsvorrichtung nach Anspruch 3, gekennzeichnet durch eine Betätigungsvorrichtung (20) die auf den bewegbaren Klemmteil (17) einwirkt und diesen aus einer Fadenhalteposition in eine Fadenfreigabepostion und wieder zurück bringt.Weft insertion device according to claim 3, characterized by an actuating device (20) which acts on the movable clamping part (17) and brings it from a thread holding position into a thread release position and back again. Schussfaden-Eintragsvorrichtung nach Anspruch 4 dadurch gekennzeichnet, dass das Betätigungsorgan (20′) in Bohrungen (29, 30, 35) eines auf der Weblade (7) befestigten Trägers (14) eingesetzt ist, wobei eine mit Druckluft bewegbare Membrane (31) auf das eine Ende (28) des Betätigungsorgans (20′) einwirkt, dessen anderes Ende (27) den beweglichen Klemmteil (17) betätigt.Weft insertion device according to claim 4, characterized in that the actuating member (20 ′) is inserted into bores (29, 30, 35) of a support (14) fastened to the sley (7), a membrane (31) movable with compressed air one end (28) of the actuator (20 ') acts, the other end (27) actuates the movable clamping part (17). Schussfaden-Eintragsvorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Betätigungsvorrichtung von einem Teil (55) gebildet wird, welcher während der Anschlagbewegung des Webblattes 7 auf den bewegbaren Klemmteil (51, 52, 54) derart einwirkt, dass Fadenklemmspalt (24) vergrössert und somit das Schussfadenende (4′) freigegeben wird.Weft insertion device according to claim 4 or 5, characterized in that the actuating device is formed by a part (55) which acts on the movable clamping part (51, 52, 54) during the stop movement of the reed 7 in such a way that the thread clamping gap (24) enlarged and thus the weft end (4 ') is released. Schussfaden-Eintragsvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Fadenklemmspalt (24) der Fadenhaltevorrichtung (13) und die Düse (18) seitlich vom Schusseintragskanal (9) angeordnet sind, wobei die den Klemmspalt (24) bildenden Klemmteile (16, 17) im wesentlichen mit der Webblattanschlagebene fluchtend angeordnet sind und die Öffnung der Düse (18) gewebeseitig in einem Abstand dazu angeordnet ist.Weft insertion device according to one of claims 1 to 6, characterized in that the thread clamping gap (24) of the thread holding device (13) and the nozzle (18) are arranged to the side of the weft insertion channel (9), the clamping parts (24) forming the clamping gap (24) 16, 17) are essentially aligned with the reed stop plane and the opening of the nozzle (18) on the fabric side is arranged at a distance from it. Schussfaden-Eintragsvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Fadenklemmspalt (24) der Fadenhaltevorrichtung (13) und die Düse (18) seitlich vom Schusseintragskanal (9) und die Öffnung der Düse (18) im wesentlichen mit der Webblattanschlagebene fluchtend angeordnet ist und die den Klemmspalt (24) bildenden Klemmteile (16, 17) gewebeseitig in einem Abstand dazu angeordnet sind.Weft insertion device according to one of claims 1 to 6, characterized in that the thread clamping gap (24) of the thread holding device (13) and the nozzle (18) laterally from the weft insertion channel (9) and the opening of the nozzle (18) essentially with the reed stop plane is aligned and the clamping parts (16, 17) forming the clamping gap (24) are arranged on the fabric side at a distance from it. Schussfaden-Eintragsvorrichtung nach einem der Ansprüche 1 bis 8, gekennzeichnet durch Mittel, welche Zeitpunkt, Dauer und Druck der Düse (18) automatisch regeln.Weft insertion device according to one of claims 1 to 8, characterized by means which automatically regulate the time, duration and pressure of the nozzle (18). Webmaschine mit einer Schussfaden-Eintragsvorrichtung nach einem der Ansprüche 1 bis 9.Loom with a weft insertion device according to one of claims 1 to 9.
EP92810247A 1991-04-30 1992-04-02 Pneumatic weft insertion device and a weaving machine with such a device Expired - Lifetime EP0511939B1 (en)

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CH1296/91 1991-04-30

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EP0778364A3 (en) * 1995-12-08 1999-04-21 Lindauer Dornier Gesellschaft M.B.H Process and loom for handling a weft thread
WO2006122531A1 (en) * 2005-05-19 2006-11-23 Lindauer Dornier Gesellschaft Mbh Method and device for maintaining a weft thread which is introduced into a weaving machine, in particular an air-jet weaving machine, after the starting process
US7650913B2 (en) 2005-05-19 2010-01-26 Lindauer Dornier Gesellschaft Mbh Method and device for maintaining a weft thread which is introduced into a weaving machine, in particular an air-jet weaving machine, after the starting process
CN101389798B (en) * 2005-05-19 2011-04-06 林道尔·多尼尔有限责任公司 Method and device for maintaining a weft thread which is introduced into a weaving machine, in particular an air-jet weaving machine, after the starting process

Also Published As

Publication number Publication date
EP0511939B1 (en) 1996-06-05
KR920019986A (en) 1992-11-20
US5224521A (en) 1993-07-06
JPH06136633A (en) 1994-05-17
DE59206458D1 (en) 1996-07-11
JP3423331B2 (en) 2003-07-07
TW224990B (en) 1994-06-11

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