EP0016021B1 - Device for inserting the weft by means of a fluid in a loom - Google Patents

Device for inserting the weft by means of a fluid in a loom Download PDF

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Publication number
EP0016021B1
EP0016021B1 EP79900605A EP79900605A EP0016021B1 EP 0016021 B1 EP0016021 B1 EP 0016021B1 EP 79900605 A EP79900605 A EP 79900605A EP 79900605 A EP79900605 A EP 79900605A EP 0016021 B1 EP0016021 B1 EP 0016021B1
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EP
European Patent Office
Prior art keywords
channel
lamellae
nozzle
weft
thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79900605A
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German (de)
French (fr)
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EP0016021A1 (en
Inventor
Walter Scheffel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PETSCHNER, GOETZ
SCHEFFEL, WALTER
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Individual
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Publication date
Priority claimed from DE2825679A external-priority patent/DE2825679C2/en
Priority claimed from DE19792919026 external-priority patent/DE2919026A1/en
Application filed by Individual filed Critical Individual
Publication of EP0016021A1 publication Critical patent/EP0016021A1/en
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Publication of EP0016021B1 publication Critical patent/EP0016021B1/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
    • D03D47/28Looms 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
    • D03D47/3006Construction of the nozzles
    • D03D47/302Auxiliary nozzles

Definitions

  • the invention relates to a device for weft insertion by means of a fluid on a weaving machine, in which the guiding and driving of the weft thread through the shed takes place in a channel, which is formed from a plurality of lamellae and is open towards the reed, with a plurality of nozzles in the channel open for the supply of the transport fluid.
  • DE-OS 2622148 and DE-AS 2608030 by the same applicant have disclosed devices which are comparable to the device in question here. These known arrangements have a flat channel with a diagonal cross-section with a larger opening towards the reed side.
  • This narrow channel which is narrowed at a vertical distance from the plane of the reed and closed off with a curve, offers optimum weft thread transport with low energy consumption and easy release of the inserted weft thread for its stop on the selvedge.
  • the weaving speeds that can be achieved in this way are limited in the mass to be moved of the devices required for the weaving shed formation, so that it is necessary to reduce the lifting height of the shed for increasing working speeds on the shedding devices in order to reduce the measuring forces.
  • the lifting height of the shed can itself be reduced if the flat thread guide channel in its cross-sectional position is brought from its diagonal position into a position parallel to the warp threads with the shed closed. With this measure, the overall height of the lamella channel would be reduced in such a way that the shed could also be reduced accordingly.
  • the slats moved out when the compartment was closed no longer offer any limitation for the weft thread with their upper envelope surface, but instead allow the weft thread to emerge from the channel smoothly regardless of the height of the fabric level.
  • each individual lamella is immersed in the warp thread array of the lower shed in such a way that the upper lamella leg divides the warp threads, whereby this division inevitably continues to the foot of the lamella via the curve rounding off the channel and at a favorable contact angle to the warp thread.
  • this property is lost when the channel cross-section is inclined horizontally, in that the warp threads can no longer slide to the slat base, but instead, after passing through the rounding that closes off the channel, plunge again into the lower slat legs.
  • the channel is delimited on its underside by other lamellae than on the top side, the lower lamellae which form the lower envelope surface being arranged in a different cross-sectional plane of the channel than the upper lamellae which form the upper envelope surface are.
  • each slat can only split the warp threads once in each weaving cycle, so that crossing over within the thread guide channel is impossible. This means that entry errors can no longer be triggered.
  • the device according to the invention in such a way that the upper envelope surface of the channel is approximately parallel to the thread plane of the closed compartment when the sley is in position.
  • the upper and lower slats have different thicknesses.
  • An optimization of the transporting enveloping flow is also achieved in that the cross section of the channel widens after each nozzle and then narrows in the direction of entry to the next nozzle, each nozzle being close to the lateral channel opening and being directed obliquely into the channel.
  • the axis of the exit jet of the nozzle does not intersect the envelope surface of the side of the channel on which the nozzle is located, whereby the nozzle is in a plane that is perpendicular to the Axis of the channel stands and which lies in the area of a vertical extension of the lateral channel opening.
  • a sley 1 with a reed 2 is moved in a circle such that the thread guide channel 7, which is firmly connected to the sley 1 and is formed from lamellae 6 and 19, is inserted into the shed 5 formed from lower warp threads 4 and upper warp threads 3. and emerges.
  • the channel 7 formed from the lamellae 6 and 19 carries nozzles 14 which are arranged at intervals over the weaving width and are supplied with a fluid via supply lines 13.
  • the lying in the lamellae 6 and 19 nozzles 14 with a flow exit direction 15 have a rectilinear feed 13 in multiple lengths of the value of the bore of the nozzle 14, so that their arrangement to the side of the reed 2 through the lower, leaking lamella legs allows that The warp threads of the lower compartment 4 rest on the feeds 13 and also lie in the flow shadow of the lamella leg parts projecting above the feeds 13, as a result of which contact between weft and warp threads is avoided.
  • the thread guide channel 7 consists of lamellae 6, which also carry the curve that closes the channel 7, and of smaller, thinner lamellae 19 therebetween.
  • the two differently, for example alternately arranged lamellae shapes 6, 19 can always share warp threads that are sufficiently separated when immersed .
  • the divided warp threads 3 can thus slide freely on the slats 19, as well as on the slats 6, at a favorable angle 18 to the slat foot or to rest on the feeds 13.
  • the slats 19 have in particular the task of generating the flow shadow for the warp threads 4 resting on the feeds 13, so that contact between the warp threads and the weft threads is avoided.
  • a weaving machine can also be seen from FIGS. 4 and 7, which describes a weaving shed 1 ', which is mounted at 10' and describes the path curve 22 ', a weaving reed 2', the heald frames 9 ', which are connected to the warp threads 3', 4 '.
  • FIG. 4 also shows section A-A in FIG. 5 and FIG. 7 shows section B-B in FIG. 8.
  • the nozzles 14 ' are shown with their differently executable feeds 13', 23 ', 24', 25 ', which are guided through the drawer rail 1', as this from the lamella comb 6 ', 19 ', 20' separately, near the opening of the channel 7 'on the blade side, let the exit jet 15' act on the weft thread in the direction of the main channel axis 8 '.
  • a shed step 12 ' through which the exit beam 15' unhindered up to the channel 7 ', 8 'Final slat part 11', which has at least one curve or a straight shape with angles, can act.
  • the feeds 13 ', 23' carry the nozzles 14 'in such a way that they are in the range of the material thickness of a lamella 6', 16 'or 17', 19 '.
  • the feeds 13 ', 23' allow a particularly streamlined design of the nozzle 14 'with a multiple length of the cross section of the nozzle 14'.
  • the designs of the feed lines 24 ', 25' do not have this optimally favorable shape, the feed 24 'not requiring a shed step 12'.
  • the feeders 26 ', 28' and 30 'shown in FIGS. 7, 8 and 9 are arranged interchangeably, for example, in a separate carrier 32' between the sley 1 'and the slat foot 20'.
  • These feeds 26 ', 28' and 30 ' have an angled portion 27', 29 '31' in the area near the reed-side opening of the channel 7 ', that the nozzles 14 'are respectively downstream behind or in the flow shadow of a lower lamella 19' in the form 17 'and thus in the region of a vertical widening of the leaf-side channel opening.
  • the lower lamellae 19 ' have a uniform curvature on the side directed towards the weft stop.
  • these are of different heights.
  • the lower lamellae 19 'according to shape 17' form a vertical narrowing of the channel 7 'on the leaf side, which is followed by a vertical expansion of the channel opening 7' on the leaf side due to the arrangement of the shape 18 '.
  • the nozzles 14 ' are arranged in the direction of entry behind the lower lamella form 17' or between forms 17 'and 18' and are thus in the region of a vertical expansion of the leaf-side channel opening, which means that the arrangement of the nozzles 14 'is almost in the same plane as the lower lamella 17 'is possible since the unimpeded effect of the exit jet 15' is primary.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)

Abstract

This device mounted in a loom, comprises a thread guide conduit (7) consisting of upper lamellae (6) and lower lamellae (19). This conduit (7) is open at the comb side (2) so that the thrown weft thread may reach the comb (2). The path of the thread is limited at the lower side of the conduit (7) by other lamellae than at the upper side. The lamellae which form the lower enveloping surface, enter the warp in other locations than the lamellae which form the upper enveloping surface.

Description

Die Erfindung betrifft eine Einrichtung zum Schusseintrag mittels eines Fluidum an einer Webmaschine, bei der die Führung und der Antrieb des Schussfadens durch das Webfach in einem, aus einer Mehrzahl von Lamellen gebildeten, zum Webblatt hin offenen Kanal erfolgt, wobei in den Kanal eine Mehrzahl Düsen für die Zuführung des Transportfluidums einmünden. Durch die DE-OS 2622148 und DE-AS 2608030 des gleichen Anmelders sind Einrichtungen bekannt geworden, die mit der hier infrage stehenden Einrichtung vergleichbar sind. Diese bekannten Anordnungen besitzen einen flach ausgebildeten, in seinem Querschnitt diagonal liegenden Kanal mit einer zur Webblattseite hin grösseren Öffnung. Dieser sich in seiner senkrechten Entfernung von der Webblattebene weg verengende, mit einer Rundung abgeschlossene flache Kanal bietet einen optimalen Schussfadentransport bei niedrigem Energiebedarf sowie ein leichtes Freigeben des eingetragenen Schussfadens zu dessen Anschlag an die Webkante.The invention relates to a device for weft insertion by means of a fluid on a weaving machine, in which the guiding and driving of the weft thread through the shed takes place in a channel, which is formed from a plurality of lamellae and is open towards the reed, with a plurality of nozzles in the channel open for the supply of the transport fluid. DE-OS 2622148 and DE-AS 2608030 by the same applicant have disclosed devices which are comparable to the device in question here. These known arrangements have a flat channel with a diagonal cross-section with a larger opening towards the reed side. This narrow channel, which is narrowed at a vertical distance from the plane of the reed and closed off with a curve, offers optimum weft thread transport with low energy consumption and easy release of the inserted weft thread for its stop on the selvedge.

Die damit erreichbaren Webgeschwindigkeiten finden jedoch eine Begrenzung in der zu bewegenden Masse der für die Webfachbildung nötigen Vorrichtungen, so dass es nötig ist, für steigende Arbeitsgeschwindigkeiten an den Fachbildevorrichtungen die Hubhöhe des Webfaches zu verringern, um so die Messkräfte zu reduzieren. Hierbei lässt sich die Hubhöhe des Webfaches an sich dadurch verringern, wenn der flache Fadenführungskanal in seiner Querschnittslage aus seiner diagonalen Lage in eine Lage parallel zu den Kettfäden bei geschlossenem Webfach gebracht wird. Mit dieser Massnahme wäre die Bauhöhe des Lamellenkanals derart verringert, dass auch das Webfach entsprechend verkleinert werden könnte. Zudem ergäbe sich noch der Vorteil, dass die bei geschlossenem Fach herausbewegten Lamellen mit ihrer oberen Hüllfläche für den Schussfaden keine Begrenzung mehr bieten, sondern den Schussfaden ohne Rücksicht auf die Höhe der Gewebeebene reibungsfrei aus dem Kanal austreten lassen.However, the weaving speeds that can be achieved in this way are limited in the mass to be moved of the devices required for the weaving shed formation, so that it is necessary to reduce the lifting height of the shed for increasing working speeds on the shedding devices in order to reduce the measuring forces. In this case, the lifting height of the shed can itself be reduced if the flat thread guide channel in its cross-sectional position is brought from its diagonal position into a position parallel to the warp threads with the shed closed. With this measure, the overall height of the lamella channel would be reduced in such a way that the shed could also be reduced accordingly. There would also be the advantage that the slats moved out when the compartment was closed no longer offer any limitation for the weft thread with their upper envelope surface, but instead allow the weft thread to emerge from the channel smoothly regardless of the height of the fabric level.

Dieses Verlagern des Kanals ist aber nicht ohne weiteres möglich. Bei den bekannten Einrichtungen taucht nämlich jede einzelne Lamelle in die Kettfadenschar des Unterfaches so ein, dass der obere Lamellenschenkel die Kettfäden teilt, wobei sich diese Teilung über die den Kanal abschliessende Rundung weiter zum Fuss der Lamelle zwangsläufig und in einem günstigen Berührungswinkel zum Kettfaden fortsetzt. Diese Eigenschaft geht aber bei einer Neigung des Kanalquerschnittes in die Waagerechte verloren, indem dann die Kettfäden nicht mehr zum Lamellenfuss abgleiten können, sondern, nach Passage der den Kanal abschliessenden Rundung, bereits die unteren Lamellenschenkel erneut teilend eintauchen. Der Berührungspunkt dieser Lamellenschenkel mit den Kettfäden liegt dabei relativ weit von der die Teilung fortführenden Rundung des Kanalbodens entfernt, so dass bei geringem seitlichem Verzug der Kettfäden die Gefahr besteht, dass bei diesem zweiten Teilungsvorgang die Kettfäden verkreuzt über den unteren Lamellenschenkel zu liegen kommen und damit, den Fadenflugkanal kreuzend, Schusseintragsfehler auslösen.This shifting of the channel is not possible without further ado. In the known devices, each individual lamella is immersed in the warp thread array of the lower shed in such a way that the upper lamella leg divides the warp threads, whereby this division inevitably continues to the foot of the lamella via the curve rounding off the channel and at a favorable contact angle to the warp thread. However, this property is lost when the channel cross-section is inclined horizontally, in that the warp threads can no longer slide to the slat base, but instead, after passing through the rounding that closes off the channel, plunge again into the lower slat legs. The point of contact of these lamella legs with the warp threads is relatively far away from the rounding of the channel bottom that continues the division, so that with a slight lateral warping of the warp threads there is a risk that during this second division process the warp threads will cross over the lower lamella leg and thus , crossing the filament flight channel, trigger weft insertion errors.

Aufgabe der vorliegenden Erfindung ist es somit, eine Einrichtung der vorgenannten Art so auszugestalten, dass die Lamellen auch bei einer in der vorstehenden Weise vorteilhaft geänderten Lage des Kanals störungsfrei und sicher in die Kettfäden des Unterfaches eintauchen können.It is therefore an object of the present invention to design a device of the aforementioned type such that the slats can be safely and reliably immersed in the warp threads of the lower shed even if the position of the channel is advantageously changed in the above manner.

Dies wird erfindungsgemäss dadurch erreicht, dass der Kanal auf seiner Unterseite von anderen Lamellen begrenzt ist als auf der Oberseite, wobei die Unterlamellen, welche die untere Hüllfläche bilden, jeweils in einer anderen Querschnittsebene des Kanals als die Oberlamellen, welche die obere Hüllfläche bilden, angeordnet sind.This is achieved according to the invention in that the channel is delimited on its underside by other lamellae than on the top side, the lower lamellae which form the lower envelope surface being arranged in a different cross-sectional plane of the channel than the upper lamellae which form the upper envelope surface are.

Zwar ist die Massnahme der Verwendung von Unter- und Oberlamellen an sich durch die DE-PS 1801044 bekannt, wobei es sich dort aber um einen Projektil-Kanal handelt, mit dem Zweck, die Berührungspunkte zwischen Projektil und Lamellen zu verringern. Die hier vorliegenden strömungstechnischen Erfordernisse sind in dieser Schrift unbeachtet.The measure of the use of lower and upper lamellae is known per se from DE-PS 1801044, but it is a projectile channel with the purpose of reducing the points of contact between the projectile and lamellae. The present fluidic requirements are not considered in this document.

Bei der hier erfindungsgemässen Anordnung von unterschiedlichen Lamellen kann jede Lamelle bei jedem Webzyklus die Kettfäden nur einmal teilen, so dass ein Überkreuzen innerhalb des Fadenführungskanals unmöglich ist. Somit können dadurch keine Eintragsfehler mehr ausgelöst werden.With the arrangement of different slats according to the invention here, each slat can only split the warp threads once in each weaving cycle, so that crossing over within the thread guide channel is impossible. This means that entry errors can no longer be triggered.

Somit ist es hier nunmehr auch möglich, die erfindungsgemässe Einrichtung so auszugestalten, dass die obere Hüllfläche des Kanals bei Eintragsstellung der Weblade annähernd parallel ist zur Fadenebene des geschlossenen Faches.Thus, it is now also possible to design the device according to the invention in such a way that the upper envelope surface of the channel is approximately parallel to the thread plane of the closed compartment when the sley is in position.

Dadurch ergibt sich die gewünschte geringe Bauhöhe für die Lamellen und somit eine wirksame Verkleinerung des Webfaches.This results in the desired low overall height for the slats and thus an effective reduction in the size of the shed.

Um dabei das Verdrängungsvolumen an den zu teilenden Kettfäden nicht zu erhöhen, besteht weiter eine vorteilhafte Weiterbildung darin, dass die Oberlamellen und Unterlamellen unterschiedliche Dicke aufweisen.In order not to increase the displacement volume on the warp threads to be divided, an advantageous further development is that the upper and lower slats have different thicknesses.

Eine Optimierung der transportierenden Hüllströmung wird zudem dadurch erreicht, dass sich der Querschnitt des Kanals jeweils nach einer Düse erweitert und sich dann in Eintragsrichtung bis zur nächsten Düse verengt, wobei jede Düse nahe der seitlichen Kanalöffnung liegt und schräg in den Kanal hinein gerichtet ist.An optimization of the transporting enveloping flow is also achieved in that the cross section of the channel widens after each nozzle and then narrows in the direction of entry to the next nozzle, each nozzle being close to the lateral channel opening and being directed obliquely into the channel.

Um ferner die Verarbeitung auch solcher Garne zuzulassen, die bisher wegen der sich bildenden Verunreinigungen die Leistung der Webmaschine begrenzten, wird vorgeschlagen, dass die Achse des Austrittsstrahles der Düse die Hüllfläche derjenigen Seite des Kanals nicht schneidet, auf der sich die Düse befindet, wobei sich die Düse in einer Ebene befindet, welche senkrecht auf der Achse des Kanals steht und welche im Bereich einer vertikalen Erweiterung der seitlichen Kanalöffnung liegt.In order to also allow the processing of such yarns, which have hitherto limited the performance of the weaving machine because of the contaminants which form, it is proposed that the axis of the exit jet of the nozzle does not intersect the envelope surface of the side of the channel on which the nozzle is located, whereby the nozzle is in a plane that is perpendicular to the Axis of the channel stands and which lies in the area of a vertical extension of the lateral channel opening.

Beispielsweise Ausführungsformen des Erfindungsgegenstandes werden nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

  • Fig. 1 eine Seitenansicht der Vorrichtung zum Schusseintrag zur Durchführung des erfindungsgemässen Verfahrens;
  • Fig. 2 eine Frontansicht der Anordnung gemäss Fig. 1;
  • Fig. 3 eine Draufsicht der Anordnung gemäss Fig. 1 und 2;
  • Fig. 4 eine Seitenansicht der Vorrichtung in einer Webmaschine in Stellung des Schusseintrages sowie als Schnitt A-A gemäss Fig. 5;
  • Fig. 5 eine Rückansicht gemäss Fig. 4 von der Webblattseite aus;
  • Fig. 6 eine Draufsicht gemäss Fig. 5;
  • Fig. 7 eine Seitenansicht der Vorrichtung in einer Webmaschine in Stellung des Schusseintrages sowie als Schnitt B-B gemäss Fig. 8;
  • Fig. 8 eine Rückansicht gemäss Fig. 7 von der Webblattseite aus, und
  • Fig. 9 eine Draufsicht gemäss Fig. 8.
For example, embodiments of the subject matter of the invention are explained in more detail below with reference to the drawing. Show it:
  • 1 shows a side view of the device for weft insertion for carrying out the method according to the invention;
  • FIG. 2 shows a front view of the arrangement according to FIG. 1;
  • 3 shows a top view of the arrangement according to FIGS. 1 and 2;
  • 4 shows a side view of the device in a weaving machine in the position of the weft insertion and as section AA according to FIG. 5;
  • 5 shows a rear view according to FIG. 4 from the reed side;
  • FIG. 6 is a top view according to FIG. 5;
  • 7 shows a side view of the device in a weaving machine in the weft insertion position and as a section BB according to FIG. 8;
  • 8 is a rear view according to FIG. 7 from the reed side, and
  • 9 is a plan view according to FIG. 8.

Gemäss Fig. 1, 2 und 3 wird eine Weblade 1 mit einem Webblatt 2 so kreisförmig bewegt, dass der fest mit der Weblade 1 verbundene, aus Lamellen 6 und 19 gebildete Fadenführungskanal 7 in das aus Unterkettfäden 4 und Oberkettfäden 3 gebildete Webfach 5 ein- und austaucht. Der aus den Lamellen 6 und 19 gebildete Kanal 7 trägt in Abständen über die Webbreite angeordnete Düsen 14, die über Zuleitungen 13 mit einem Fluidum versorgt werden. Die in den Lamellen 6 und 19 liegenden Düsen 14 mit einer Strömungsaustrittsrichtung 15 haben eine geradlinige Zuführung 13 in mehrfacher Länge des Wertes der Bohrung der Düse 14, so dass deren Anordnung zur Seite des Webblattes 2 hin durch die unteren, auslaufenden Lamellenschenkel gestattet, dass die Kettfäden des Unterfaches 4 auf den Zuführungen 13 aufliegen und zudem im Strömungsschatten der die Zuführungen 13 überragenden Lamellenschenkelteile liegen, wodurch eine Berührung zwischen Schuss- und Kettfäden vermieden wird.1, 2 and 3, a sley 1 with a reed 2 is moved in a circle such that the thread guide channel 7, which is firmly connected to the sley 1 and is formed from lamellae 6 and 19, is inserted into the shed 5 formed from lower warp threads 4 and upper warp threads 3. and emerges. The channel 7 formed from the lamellae 6 and 19 carries nozzles 14 which are arranged at intervals over the weaving width and are supplied with a fluid via supply lines 13. The lying in the lamellae 6 and 19 nozzles 14 with a flow exit direction 15 have a rectilinear feed 13 in multiple lengths of the value of the bore of the nozzle 14, so that their arrangement to the side of the reed 2 through the lower, leaking lamella legs allows that The warp threads of the lower compartment 4 rest on the feeds 13 and also lie in the flow shadow of the lamella leg parts projecting above the feeds 13, as a result of which contact between weft and warp threads is avoided.

Der im Querschnitt flach gehaltene Kanal 7 liegt parallel zu den Kettfäden 3, 4 bei geschlossenem Webfach 8, so dass, im Zuge der Bewegung des Kanals 7 zum Webblattanschlag, der in der Ebene 8 liegende Schussfaden auch bei allen möglichen erforderlichen Webfachlagen, die diese Ebene 8 variieren lassen, ungehindert aus der Hüllfläche des Kanals 7 austreten kann, wie es auch die gestrichtelt dargestellte Lage des Kanals 7 erkennen lässt.The channel 7, which is kept flat in cross-section, lies parallel to the warp threads 3, 4 with the shed 8 closed, so that, in the course of the movement of the channel 7 to the reed stop, the weft thread lying in the plane 8 also with all possible necessary shed layers that this plane 8 can vary, can emerge unhindered from the envelope surface of the channel 7, as can also be seen from the position of the channel 7 shown in broken lines.

Neben der dadurch erreichten geringeren Bauhöhe der Lamellen und der damit möglichen Verkleinerung der Webfachhöhe mit der erstrebten Steigerung der Webmaschinendrehzahl kann ein sicheres und störungsfreies Eintauchen der Lamellen durch das Unterfach 4 wie folgt erreicht werden. Hierfür besteht der Fadenführungskanal 7 aus Lamellen 6, die auch die den Kanal 7 abschliessende Rundung tragen, sowie aus dazwischenliegenden kleineren, dünneren Lamellen 19. Dadurch können die beiden unterschiedlich, zum Beispiel wechselweise angeordneten Lamellenformen 6, 19 stets ausreichend getrennt gelegene Kettfäden beim Eintauchen teilen. Die geteilten Kettfäden 3 können somit an den Lamellen 19, wie auch an den Lamellen 6 ungehindert im günstigen Winkel 18 bis zum Lamellenfuss oder zur Auflage auf die Zuführungen 13 abgleiten.In addition to the resulting lower overall height of the slats and the possible reduction in the shed height with the desired increase in the weaving machine speed, a safe and trouble-free immersion of the slats can be achieved by the lower shed 4 as follows. For this purpose, the thread guide channel 7 consists of lamellae 6, which also carry the curve that closes the channel 7, and of smaller, thinner lamellae 19 therebetween. As a result, the two differently, for example alternately arranged lamellae shapes 6, 19 can always share warp threads that are sufficiently separated when immersed . The divided warp threads 3 can thus slide freely on the slats 19, as well as on the slats 6, at a favorable angle 18 to the slat foot or to rest on the feeds 13.

Von Vorteil ist es weiter, die Lamellen 19 in ihrer Dicke gegenüber den Lamellen 6 dünner zu halten, wodurch das verdrängte Volumen der geteilten Kettfäden 3, 4 nicht angehoben wird.It is also advantageous to keep the slats 19 thinner in their thickness than the slats 6, as a result of which the displaced volume of the divided warp threads 3, 4 is not increased.

Die Lamellen 19 haben neben der möglichen Aufgabe zur Halterung der Düsen 14 insbesondere die Aufgabe, den Strömungsschatten für die auf den Zuführungen 13 aufliegenden Kettfäden 4 zu erzeugen, so dass eine Berührung zwischen Kettfäden und Schussfäden vermieden wird. Aus den Figuren 4 und 7 ist weiter eine Webmaschine erkennbar, welche eine Weblade 1', die bei 10' gelagert ist und die Bahnkurve 22' beschreibt, ein Webblatt 2', die Webschäfte 9', die mit den Kettfäden 3', 4' das Webfach 5' bilden und den, durch Schrauben 21' mit der Weblade 1' fest verbundenen und schwenkenden, aus Oberlamellen 6', 16' und Unterlamellen 17', 18', 19' und dem Lamellenfuss 20' bestehenden Fadenführungskanal 7', 8' umfasst. Fig. 4 zeigt zugleich den Schnitt A-A in Fig. 5 und Fig. 7 zeigt den Schnitt B-B in Fig. 8.In addition to the possible task of holding the nozzles 14, the slats 19 have in particular the task of generating the flow shadow for the warp threads 4 resting on the feeds 13, so that contact between the warp threads and the weft threads is avoided. A weaving machine can also be seen from FIGS. 4 and 7, which describes a weaving shed 1 ', which is mounted at 10' and describes the path curve 22 ', a weaving reed 2', the heald frames 9 ', which are connected to the warp threads 3', 4 '. form the shed 5 'and the thread guide channel 7', 8, which is firmly connected and swivels by screws 21 'to the sley 1' and consists of upper slats 6 ', 16' and lower slats 17 ', 18', 19 'and the slat foot 20' 'includes. FIG. 4 also shows section A-A in FIG. 5 and FIG. 7 shows section B-B in FIG. 8.

In den Fig. 4, 5 und 6 sind die Düsen 14' mit ihren verschieden ausführbaren Zuführungen 13', 23', 24', 25', die durch die Ladenschiene 1' geführt sind, so dargestellt, wie diese vom Lamellenkamm 6', 19', 20' getrennt, nahe der blattseitigen Öffnung des Kanals 7' den Austrittsstrahl 15' in Richtung der Kanalhauptachse 8' auf den Schussfaden wirken lassen.4, 5 and 6, the nozzles 14 'are shown with their differently executable feeds 13', 23 ', 24', 25 ', which are guided through the drawer rail 1', as this from the lamella comb 6 ', 19 ', 20' separately, near the opening of the channel 7 'on the blade side, let the exit jet 15' act on the weft thread in the direction of the main channel axis 8 '.

Die Kettfäden 4' bilden im Unterfach gemäss Fig. 4 und 5 durch die teilweise Auflage auf den Zuführungen 13', 23' und 25' eine Webfachstufe 12', durch welche der Austrittsstrahl 15' ungehindert bis zu dem, den Kanal 7', 8' abschliessenden Lamellenteil 11', welcher mindestens eine Rundung oder eine gerade Form mit Winkeln hat, wirken kann.The warp threads 4 'form in the lower shed according to FIGS. 4 and 5, due to the partial support on the feeds 13', 23 'and 25', a shed step 12 ', through which the exit beam 15' unhindered up to the channel 7 ', 8 'Final slat part 11', which has at least one curve or a straight shape with angles, can act.

Die Zuführungen 13', 23' tragen die Düsen 14' derart, dass diese im Bereich der Materialstärke einer Lamelle 6', 16' oder 17', 19' liegen. Die Zuführungen 13', 23' erlauben eine besonders strömungsgünstige Ausbildung der Düse 14' mit einer mehrfachen Länge des Querschnittes der Düse 14'. Die Ausführungen der Zuleitungen 24', 25' haben nicht diese optimal günstige Form, wobei die Zuführung 24' keine Webfachstufe 12' erfordert.The feeds 13 ', 23' carry the nozzles 14 'in such a way that they are in the range of the material thickness of a lamella 6', 16 'or 17', 19 '. The feeds 13 ', 23' allow a particularly streamlined design of the nozzle 14 'with a multiple length of the cross section of the nozzle 14'. The designs of the feed lines 24 ', 25' do not have this optimally favorable shape, the feed 24 'not requiring a shed step 12'.

Die in den Fig. 7, 8 und 9 dargestellten Zuführungen 26', 28' und 30' sind beispielsweise in einem separaten Träger 32' zwischen Weblade 1' und Lamellenfuss 20' auswechselbar angeordnet. Diese Zuführungen 26', 28' und 30' besitzen im Bereich nahe der webblattseitigen Öffnung des Kanals 7' eine Abwinkelung 27', 29' 31' derart, dass die Düsen 14' jeweils stromabwärts hinter bzw. im Strömungsschatten einer Unterlamelle 19' in Form 17' und somit im Bereich einervertikalen Erweiterung der blattseitigen Kanalöffnung liegen.The feeders 26 ', 28' and 30 'shown in FIGS. 7, 8 and 9 are arranged interchangeably, for example, in a separate carrier 32' between the sley 1 'and the slat foot 20'. These feeds 26 ', 28' and 30 'have an angled portion 27', 29 '31' in the area near the reed-side opening of the channel 7 ', that the nozzles 14 'are respectively downstream behind or in the flow shadow of a lower lamella 19' in the form 17 'and thus in the region of a vertical widening of the leaf-side channel opening.

In den Fig. 4 und 7 sind die Oberlamellen 6' mit dem Kanalabschluss 11' so dargestellt, dass die unteren Schenkel 16' eine einheitliche Form besitzen.4 and 7, the upper slats 6 'with the channel end 11' are shown so that the lower legs 16 'have a uniform shape.

Nach den Fig. 4-9 besitzen die Unterlamellen 19' auf der, zum Schussfadenanschlag gerichteten Seite eine einheitliche Rundung. Auf der, nach der blattseitigen Kanalöffnung 7' gerichteten Seite sind diese dagegen unterschiedlich hoch. Hierbei bilden die Unterlamellen 19' nach Form 17' eine vertikale blattseitige Verengung des Kanals 7', worauf, durch die Anordnung solcher nach Form 18', eine vertikale Erweiterung der blattseitigen Kanalöffnung 7' folgt.4-9, the lower lamellae 19 'have a uniform curvature on the side directed towards the weft stop. On the other hand, on the side directed towards the leaf-side channel opening 7 ', these are of different heights. Here, the lower lamellae 19 'according to shape 17' form a vertical narrowing of the channel 7 'on the leaf side, which is followed by a vertical expansion of the channel opening 7' on the leaf side due to the arrangement of the shape 18 '.

Die Düsen 14' sind in Eintragsrichtung hinter der Unterlamelle Form 17' bzw. zwischen Formen 17' und 18' angeordnet und liegen damit im Bereich einer vertikalen Erweiterung der blattseitigen Kanalöffnung, womit auch die Anordnung der Düsen 14' nahezu in gleicher Ebene mit der Unterlamelle 17' möglich ist, da hier die ungehinderte Wirkung des Austrittsstrahles 15' primär ist.The nozzles 14 'are arranged in the direction of entry behind the lower lamella form 17' or between forms 17 'and 18' and are thus in the region of a vertical expansion of the leaf-side channel opening, which means that the arrangement of the nozzles 14 'is almost in the same plane as the lower lamella 17 'is possible since the unimpeded effect of the exit jet 15' is primary.

Die sich aus der wiederholenden Anordnung über die Webbreite von Unterlamellen der Formen 17' und 18' ergebenden stetigen Verengungen und Erweiterungen der blattseitigen Kanalöffnung 7' erbringen verringerte Strömungswirbel und weniger Verunreinigungen durch Faserstaub und dgl.The continuous narrowing and widening of the leaf-side channel opening 7 'resulting from the repeated arrangement over the weaving width of lower lamellas of the forms 17' and 18 'result in reduced flow eddies and less contamination by fiber dust and the like.

Claims (5)

1. Apparatus for weft thread insertion by means of a fluid in a loom, by which the guidance and propulsion of the weft thread through the warp shed takes place in a channel, said weft channel comprising a plurality of lamellae and being open towards the reed of the loom, whereby a plurality of nozzeles for the supply of transport fluid extends into said channel; characterized in that the lamellae defining the under side of said channel (7; 8') differ from those of the upper side, whereby said lower lamellae (19; 17', 18', 19'), which constitute the lower flanks of said cannel, are arranged respectively in another cross-sectional plane of said channel (7; 8') as said upper lamellae (6; 6'), which constitute the upper flanks.
2. Apparatus as in Claim 1, characterized in that, when the sley (1; 1') is in a position of weft- transport, the upper flanks of said channel (7; 8') is approximately parallel to the thread plane of the closed warp shed (5; 5').
3. Apparatus as in claim 1 or 2, characterized in that said upper lamellae (6; 6', 16') are of a different thickness to said lower lamellae (19; 17', 18', 19').
4. Apparatus as in claim 1, characterized in that the crosssection widens after each nozzle (14; 14') and then narrows in direction towards the next nozzle respectively, each nozzle being arranged adjacent a laterally open side of said channel and directed into channel at an angle.
5. Apparatus as in claim 2, characterized in that the axis of the outlet stream (15') of the nozzle (14') does not intersect the flank on the side of the channel where said nozzle (14') is situated; said nozzle being situated on a plane that is vertical on the axis of the channel (8') and that lies in the region of a vertical widening of the lateral channel opening (7').
EP79900605A 1978-06-12 1980-01-29 Device for inserting the weft by means of a fluid in a loom Expired EP0016021B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2825679A DE2825679C2 (en) 1978-06-12 1978-06-12 Device for weft insertion on weaving machines by means of a flowing medium
DE2825679 1978-06-12
DE2919026 1979-05-11
DE19792919026 DE2919026A1 (en) 1979-05-11 1979-05-11 Guide for weft inserted by propelling jets - formed as open channel by differing upper and lower dents

Publications (2)

Publication Number Publication Date
EP0016021A1 EP0016021A1 (en) 1980-10-01
EP0016021B1 true EP0016021B1 (en) 1983-11-23

Family

ID=25774686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79900605A Expired EP0016021B1 (en) 1978-06-12 1980-01-29 Device for inserting the weft by means of a fluid in a loom

Country Status (6)

Country Link
EP (1) EP0016021B1 (en)
CS (1) CS220788B2 (en)
GB (1) GB2037333B (en)
IT (1) IT1125356B (en)
NL (1) NL7904374A (en)
WO (1) WO1980000087A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039741A1 (en) * 1980-05-08 1981-11-18 Walter Scheffel Loom with weft insertion by fluid means
FR2534603A1 (en) * 1982-10-14 1984-04-20 Alsacienne Constr Mat Tex DEVICE FOR FAVORING THE INSERTION OF THE FRAME WIRE ON A WEAVING

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH465521A (en) * 1967-12-08 1968-11-15 Sulzer Ag Guide device for the weft thread insertion element of a weaving machine
CS165002B1 (en) * 1970-09-18 1975-11-28
CS149198B1 (en) * 1971-07-27 1973-05-24

Also Published As

Publication number Publication date
IT7923481A0 (en) 1979-06-12
GB2037333B (en) 1982-11-17
EP0016021A1 (en) 1980-10-01
IT1125356B (en) 1986-05-14
WO1980000087A1 (en) 1980-01-24
NL7904374A (en) 1979-12-14
GB2037333A (en) 1980-07-09
CS220788B2 (en) 1983-04-29

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