EP0018320B1 - Weft insertion means for shuttleless looms - Google Patents

Weft insertion means for shuttleless looms Download PDF

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Publication number
EP0018320B1
EP0018320B1 EP80810099A EP80810099A EP0018320B1 EP 0018320 B1 EP0018320 B1 EP 0018320B1 EP 80810099 A EP80810099 A EP 80810099A EP 80810099 A EP80810099 A EP 80810099A EP 0018320 B1 EP0018320 B1 EP 0018320B1
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EP
European Patent Office
Prior art keywords
weft
introducing member
slot
receiving slot
clamping device
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
EP80810099A
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German (de)
French (fr)
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EP0018320A1 (en
Inventor
Jakob Müller
Ferdinand Diesner
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.)
Textilma AG
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Textilma AG
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Filing date
Publication date
Application filed by Textilma AG filed Critical Textilma AG
Publication of EP0018320A1 publication Critical patent/EP0018320A1/en
Application granted granted Critical
Publication of EP0018320B1 publication Critical patent/EP0018320B1/en
Expired legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—Looms 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
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers

Definitions

  • the invention relates to a weft insertion element for a protective weaving machine according to the preamble of claim 1.
  • weft insertion elements of the type mentioned at the outset are known, for example, from DE-A-659180.
  • the weft insertion element has a relatively large cross-sectional dimension, so that the chain compartment must be opened relatively wide in order to be able to carry out the weft insertion element. This leads to large, heavy and therefore slow drives, and thus to poor performance of the weaving machine.
  • the weft insertion organ is otherwise very complicated. Long downtimes occur during maintenance and repair work because the entire weft insertion element has to be replaced.
  • a defenseless weaving machine with a weft insertion element without a cutting device which has a tubular housing, the wall of which contains a housing slot forming a receiving slot.
  • a clamping device interacts with this, which is formed from a sleeve-shaped attachment part which is pushed over the tubular housing.
  • a bolt penetrates the attachment part and the tubular housing in the radial direction, the latter being guided in an axial slot in the latter.
  • a helical spring engages the bolt and pretensions it and thus the attachment part against the front side of the receiving slot in order to clamp a weft thread.
  • a pulling rope is attached to the bolt, which pulls the attachment part back under the influence of a control device in order to release a pinched weft thread.
  • the attachment part is an obstacle that makes it difficult to insert the weft insertion element into a chain compartment and requires the same to be opened wide
  • the arrangement of the prestressing coil spring and the control cable controlled by a control device in the weft insertion element is very complicated, costly, prone to failure and taking up space .
  • any repair work is cumbersome and time consuming.
  • the object of the invention is to design a weft insertion element of the type mentioned at the outset in such a way that it is extremely simple, easy and quick to replace and, furthermore, small in order to make do with a small opening of the chain compartment.
  • the arrangement of the clamping device and a part of the receiving slot in an exchangeable insert body, which is inserted into a tubular housing of the weft insertion member, the housing still forming part of the slot, results in a maintenance and repair-friendly weft insertion member, since the insert body is replaced extremely quickly can be and the weaving machine has practically no downtime in this regard.
  • the insert body contains the clamping device and the housing is the supporting part, the clamping device and thus the insert body can be made very simple and small, so that the weft insertion member has only a small cross-sectional dimension and thus only requires a small opening of the chain compartment. In this way, the drive of the weaving machine can also be kept small, so that it has only low inertial forces and can run correspondingly faster, which leads to higher performance of the weaving machine.
  • the receiving slot of the weft insertion element can have a uniform width over its entire depth.
  • an embodiment according to claim 2 is particularly advantageous, since the wider input part enables the weft thread to be gripped more securely, while the inwardly tapering part ensures improved guidance and hold of the weft thread.
  • a particularly simple embodiment of the clamping device is defined in claim 3. Due to the curved coil spring, the spring turns open to one side and allow a weft thread to engage. The weft thread is guided to the side of the adjacent turns and clamped by the pull during the entry movement.
  • the coil spring can be arranged in the direction of the weft insertion member.
  • an embodiment according to claim 4 is more advantageous.
  • An embodiment of the clamping device according to claims 5 to 7 enables on the one hand a stronger clamping of the weft thread to be inserted in the insertion direction and nevertheless an easier release when the weft thread insertion member is moved in the opposite direction.
  • the cutting device can be designed according to claim 8, wherein the scissor-like design ensures a more secure cutting of the weft thread.
  • the scissor arms can be biased by a spring force into a partially open position of the scissors, whereby an increase in the tension of the weft thread as the weft thread insertion element advances can further actuate the scissors against the spring force of the pretensioning and cuts the weft thread.
  • a simpler design of the cutting device describes claim 9.
  • an increase in the tension of the weft causes a through separate it at the knife edge.
  • a particularly simple embodiment of the cutting device describes claim 10.
  • the knife edge cannot be replaced with the insert body, but the edge of the housing slot serving as knife edge must be reground.
  • FIG. 1 shows in the diagram the production of a fabric 2, for example a band fabric, from warp threads 4 that are open to a compartment 6 and a weft thread 8 that is inserted into the chain compartment 6.
  • the weft thread 8 is drawn off from a yarn spool 12 by means of the weft thread insertion member 10 and inserted into the warp compartment 6 from the fabric side edge 14 and struck with the reed 18.
  • the weft thread insertion member 10 has a receiving slot 20 which points counter to the insertion direction and is used for receiving and carrying the weft thread 8.
  • the weft insertion element 10 contains a tubular housing 22, at the end of which an insert body 24 is inserted.
  • the receiving slot 20 consists of an insert body slot 26 in the insert body 24 and a housing slot 28 of the housing 22.
  • the insert body slot 26 and the housing slot 28 essentially correspond to one another and interact.
  • the insert body 24 has a cutting device 30 for the weft thread 8.
  • the weft insertion member contains a clamping device 32 for receiving and for holding the weft thread 8 to be inserted.
  • the insert body 24 is tapered at its tip.
  • the clamping device 32 contains a helical spring 36 arranged at the base 34 of the receiving slot 20, which is arranged in an opening 38 in the insert body 24.
  • This arrangement is such that the helical spring is arranged coaxially with an axis 40 which is bent transversely to the receiving slot 20 and against it.
  • the turns 42 of the helical spring 36 open against the receiving slot 20 and permit the engagement of a weft thread 8. Since the turns 42 taper on the side facing away from the receiving slot 20, they can clamp a weft thread in this direction, as shown in FIG. 3 emerges.
  • the cutting device 30 consists of a knife edge 44, which in the present case is arranged on the insert body 24 on the side of the weft insertion element 10 facing away from the reed 18.
  • the knife edge protrudes into the receiving slot 20 of the weft insertion element 10.
  • Screws 46 (not shown in more detail) enable the knife edge to be replaced.
  • the knife edge can also be arranged on the outside of the housing. It is also possible to sharpen the housing slot 28 and use it as a knife edge.
  • FIG. 1 shows a further exemplary embodiment of an insert body 48 with a modified clamping device 50.
  • the latter has a chamber 54 which adjoins the base of the receiving slot 52 and in which a clamping body 56 is arranged, which is biased by a spring 58 against the receiving slot 52.
  • the clamping body 56 is designed as a rotating body, preferably as a ball.
  • a lint discharge channel 62, 64 opens into the chamber 60 for receiving the spring 58 and into the chamber 54 of the clamping body 56, in order to be able to remove the lint which arises during weaving.
  • a weft thread passes through the receiving slot 52 into the chamber 54 and displaces the clamping body 56 with increasing tension, whereby it sticks in the gap between the clamping body 56 and the chamber wall. The stronger the pull of the weft thread, the tighter it jams in the clamping device. In the opposite direction of movement of the weft insertion element, the weft is released from the clamping body 56.
  • FIG. 1 shows a further exemplary embodiment of an insert body 66, which is designed analogously to that of FIG. 1, but now the clamping device 68 has a somewhat larger chamber 70 in which two clamping bodies 72 are arranged, which are pressed against the receiving slot 76 by means of a spring 74 are biased.
  • the clamping bodies 72 expediently again consist of rotating bodies, for example cylinders or balls, the weft thread to be inserted being able to clamp between the clamping bodies 72.
  • the clamping bodies 72 roll against each other both when clamping and when later loosening.
  • the weft insertion element 10 reaches from the left side of the fabric in FIG. 1 through the open chain compartment 6 and detects the weft 8 on the right side of the fabric 14 by snapping it into the receiving slot 20.
  • the weft insertion element is then moved to the left, on the one hand pulling the weft 8 from the yarn spool 12 and on the other hand pulling the already woven-in weft.
  • a weft thread loop is first formed and pressed into the clamping device 32 by the increasing tension of the weft thread. As soon as the part of the weft thread facing the fabric has reached a certain tension with the progressive movement of the weft thread insertion member 10, the weft thread is cut off on the side facing away from the reed 18 by means of the cutting device 30.
  • the separated leg of the weft loop remains in the chain compartment.
  • the other leg of the weft thread 8 remains clamped in the clamping device 32 of the weft thread insertion element 10 and is pulled through the chain compartment 6 onto the left side of the fabric by means of the weft thread insertion element 10.
  • the chain compartment 6 now changes and the reed 18 beats the final thread 8 entered.
  • the weft insertion element then moves again from left to right and carries the remaining part of the previous weft thread into the new chain compartment. As a result, the remaining part is stretched and the thread tension thus reached pulls the remaining part of the weft thread out of the clamping device 32 so that it comes to rest in the warp compartment.
  • the weft insertion element 10 continues to move to the right side and can grasp a new weft 8, whereupon the insertion process described above is repeated.
  • the weft insertion member can be a weft rod, but it is also possible to design the weft insertion member as a flexible band or as a missile, the active end of which is designed in the manner according to the invention.

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

Description

Die Erfindung betrifft ein Schussfadeneintragorgan für schützenlose Webmaschine gemäss Oberbegriff des Anspruches 1.The invention relates to a weft insertion element for a protective weaving machine according to the preamble of claim 1.

Schussfadeneintragorgane der eingangs genannten Art sind beispielsweise aus der DE-A-659180 bekannt. Das Schussfadeneintragorgan weist eine relativ grosse Querschnittsabmessung auf, so dass das Kettenfach relativ weit geöffnet werden muss, um das Schussfadeneintragorgan durchführen zu können. Dies führt zu grossen schweren und damit langsamen Antrieben und damit zu geringen Leistungen der Webmaschine. Das Schussfadeneintragorgan ist im übrigen sehr kompliziert aufgebaut. Bei Wartungs- und Reparaturarbeiten entstehen lange Stillstandzeiten, weil das ganze Schussfadeneintragorgan ausgewechselt werden muss.Weft insertion elements of the type mentioned at the outset are known, for example, from DE-A-659180. The weft insertion element has a relatively large cross-sectional dimension, so that the chain compartment must be opened relatively wide in order to be able to carry out the weft insertion element. This leads to large, heavy and therefore slow drives, and thus to poor performance of the weaving machine. The weft insertion organ is otherwise very complicated. Long downtimes occur during maintenance and repair work because the entire weft insertion element has to be replaced.

Weiter ist aus der FR-A-1 456409 eine schützenlose Webmaschine mit einem Schussfadeneintragorgan ohne Schneidvorrichtung bekannt, welches ein rohrförmiges Gehäuse aufweist, dessen Wandung einen einen Aufnahmeschlitz bildenden Gehäuseschlitz enthält. Mit diesem wirkt eine Klemmvorrichtung zusammen, die aus einem hülsenförmigen Aufsatzteil gebildet ist, der über das rohrförmige Gehäuse geschoben ist. Ein Bolzen durchdringt in radialer Richtung den Aufsatzteil und das rohrförmige Gehäuse, wobei er in letzterem in einem achsialen Langloch geführt ist. Innerhalb des rohrförmigen Gehäuses greift einerseits eine Schraubenfeder am Bolzen an und spannt diesen und damit den Aufsatzteil gegen die vordere Seite des Aufnahmeschlitzes vor, um einen Schussfaden einzuklemmen. Andererseits ist an dem Bolzen ein Zugseil befestigt, welches unter dem Einfluss einer Steuervorrichtung den Aufsatzteil zurückholt, um einen eingeklemmten Schussfaden freizugeben. Abgesehen davon, dass der Aufsatzteil ein Hindernis darstellt, welches das Einführen des Schussfadeneintragorganes in ein Kettenfach erschwert und ein weites Oeffnen desselben verlangt, ist die Anordnung der vorspannenden Schraubenfeder und des von einer Steuervorrichtung gesteuerten Zugseiles im Schussfadeneintragorgan sehr kompliziert, kostspielig, störanfällig und Platz verbrauchend. Ausserdem sind etwaige Reparaturarbeiten umständlich und zeitraubend.Furthermore, from FR-A-1 456409 a defenseless weaving machine with a weft insertion element without a cutting device is known, which has a tubular housing, the wall of which contains a housing slot forming a receiving slot. A clamping device interacts with this, which is formed from a sleeve-shaped attachment part which is pushed over the tubular housing. A bolt penetrates the attachment part and the tubular housing in the radial direction, the latter being guided in an axial slot in the latter. Within the tubular housing, on the one hand, a helical spring engages the bolt and pretensions it and thus the attachment part against the front side of the receiving slot in order to clamp a weft thread. On the other hand, a pulling rope is attached to the bolt, which pulls the attachment part back under the influence of a control device in order to release a pinched weft thread. In addition to the fact that the attachment part is an obstacle that makes it difficult to insert the weft insertion element into a chain compartment and requires the same to be opened wide, the arrangement of the prestressing coil spring and the control cable controlled by a control device in the weft insertion element is very complicated, costly, prone to failure and taking up space . In addition, any repair work is cumbersome and time consuming.

Aufgabe der Erfindung ist es, ein Schussfadeneintragorgan der eingangs genannten Art so auszubilden, dass es ausserordentlich einfach, leicht und schnell auswechselbar und überdies klein ist, um mit einer geringen Oeffnung des Kettenfaches auszukommen.The object of the invention is to design a weft insertion element of the type mentioned at the outset in such a way that it is extremely simple, easy and quick to replace and, furthermore, small in order to make do with a small opening of the chain compartment.

Diese Aufgabe wird erfindungsgemäss durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.According to the invention, this object is achieved by the characterizing features of claim 1.

Durch die Anordnung der Klemmvorrichtung und eines Teiles des Aufnahmeschlitzes in einem auswechselbaren Einsatzkörper, der in ein rohrförmiges Gehäuse des Schusseintragorganes eingesetzt ist, wobei das Gehäuse noch einen Teil des Schlitzes bildet, ergibt sich ein wartungs- und reparaturfreundliches Schusseintragorgan, da der Einsatzkörper ausserordentlich schnell ausgewechselt werden kann und die Webmaschine somit diesbezüglich praktisch keine Stillstandszeiten aufweist. Da der Einsatzkörper die Klemmvorrichtung enthält und das Gehäuse der tragende Teil ist, kann die Klemmvorrichtung und damit der Einsatzkörper sehr einfach und klein gebaut werden, so dass das Schusseintragorgan nur eine geringe Querschnittsabmessung aufweist und somit nur eine geringe Oeffnung des Kettenfaches erfordert. Damit kann auch der Antrieb der Webmaschine klein gehalten werden, so dass er nur geringe Massenkräfte aufweist und entsprechend schneller laufen kann, was zu höheren Leistungen der Webmaschine führt.The arrangement of the clamping device and a part of the receiving slot in an exchangeable insert body, which is inserted into a tubular housing of the weft insertion member, the housing still forming part of the slot, results in a maintenance and repair-friendly weft insertion member, since the insert body is replaced extremely quickly can be and the weaving machine has practically no downtime in this regard. Since the insert body contains the clamping device and the housing is the supporting part, the clamping device and thus the insert body can be made very simple and small, so that the weft insertion member has only a small cross-sectional dimension and thus only requires a small opening of the chain compartment. In this way, the drive of the weaving machine can also be kept small, so that it has only low inertial forces and can run correspondingly faster, which leads to higher performance of the weaving machine.

Vorteilhafte Ausbildungen der Webmaschine sind in den Ansprüchen 2 bis 11 umschrieben.Advantageous designs of the weaving machine are described in claims 2 to 11.

Der Aufnahmeschlitz des Schussfadeneintragorganes kann über seine ganze Tiefe eine gleichmässige Breite aufweisen. Besonders vorteilhaft ist jedoch eine Ausbildung nach Anspruch 2, da der breitere Eingangsteil ein sichereres Erfassen des Schussfadens ermöglicht, während der nach innen sich verjüngende Teil eine verbesserte Führung und Halt des Schussfadens gewährleistet.The receiving slot of the weft insertion element can have a uniform width over its entire depth. However, an embodiment according to claim 2 is particularly advantageous, since the wider input part enables the weft thread to be gripped more securely, while the inwardly tapering part ensures improved guidance and hold of the weft thread.

Eine besonders einfache Ausbildung der Klemmvorrichtung ist in Anspruch 3 definiert. Durch die gebogene Schraubenfeder öffnen sich die Federwindungen nach einer Seite und ermöglichen das Eingreifen eines Schussfadens. Durch den Zug bei der Eintragsbewegung wird der Schussfaden auf die Seite der aneinanderliegenden Windungen geführt und festgeklemmt. Die Schraubenfeder kann in Richtung des Schusseintragorganes angeordnet sein. Vorteilhafter ist jedoch eine Ausbildung nach Anspruch 4.A particularly simple embodiment of the clamping device is defined in claim 3. Due to the curved coil spring, the spring turns open to one side and allow a weft thread to engage. The weft thread is guided to the side of the adjacent turns and clamped by the pull during the entry movement. The coil spring can be arranged in the direction of the weft insertion member. However, an embodiment according to claim 4 is more advantageous.

Eine Ausbildung der Klemmvorrichtung nach den Ansprüchen 5 bis 7 ermöglicht einerseits ein stärkeres Klemmen des einzutragenden Schussfadens in Eintragsrichtung und dennoch ein leichteres Lösen, wenn das Schussfadeneintragorgan in entgegengesetzter Richtung bewegt wird.An embodiment of the clamping device according to claims 5 to 7 enables on the one hand a stronger clamping of the weft thread to be inserted in the insertion direction and nevertheless an easier release when the weft thread insertion member is moved in the opposite direction.

Die Schneidvorrichtung kann nach Anspruch 8 ausgestaltet sein, wobei die scherenartige Ausbildung ein sichereres Schneiden des Schussfadens gewährleistet. Dabei können die Scherenarme mittels Federkraft in eine teilweise geöffnete Stellung der Schere vorgespannt sein, wobei ein Ansteigen der Spannung des Schussfadens bei fortschreitendem Schussfadeneintragorgan die Schere entgegen der Federkraft der Vorspannung weiter betätigen kann und ein Durchschneiden des Schussfadens bewirkt. Eine einfachere Ausbildung der Schneidvorrichtung umschreibt Anspruch 9. Auch hier bewirkt ein Anstieg der Spannung des Schussfadens ein Durchtrennen desselben an der Messerschneide. Eine besonders einfache Ausgestaltung der Schneidvorrichtung umschreibt Anspruch 10. Allerdings kann hier die Messerschneide nicht mit dem Einsatzkörper ausgewechselt werden, sondern der als Messerschneide dienende Rand des Gehäuseschlitzes muss nachgeschliffen werden.The cutting device can be designed according to claim 8, wherein the scissor-like design ensures a more secure cutting of the weft thread. The scissor arms can be biased by a spring force into a partially open position of the scissors, whereby an increase in the tension of the weft thread as the weft thread insertion element advances can further actuate the scissors against the spring force of the pretensioning and cuts the weft thread. A simpler design of the cutting device describes claim 9. Here too, an increase in the tension of the weft causes a through separate it at the knife edge. A particularly simple embodiment of the cutting device describes claim 10. However, here the knife edge cannot be replaced with the insert body, but the edge of the housing slot serving as knife edge must be reground.

Von Vorteil ist es, die Webmaschine nach Anspruch 11 auszugestalten, um Flusenrückstände im Schussfadeneintragorgan, insbesondere in der Klemmvorrichtung, abzuführen.It is advantageous to design the weaving machine according to claim 11 in order to remove lint residues in the weft insertion element, in particular in the clamping device.

Ausführungsbeispiele der erfindungsgemässen Webmaschine werden nachfolgend anhand schematischer Zeichnungen näher beschrieben, dabei zeigen :

  • Figur 1 das Prinzip der Herstellung eines Gewebes an einer Webmaschine mit einem Schusseintragorgan, in schaubildlicher Darstellung ;
  • Figur das Schusseintragorgang der Fig. 1, bestehend aus einem Gehäuse und einem Einsatzkörper, in schaubildlicher, auseinandergezogener Darstellung ;
  • Figur 3 den Einsatzkörper der Fig. 2 in teilweisem Längsschnitt ;
  • Figur 4 den Einsatzkörper der Fig. 3 im Schnitt IV-IV ;
  • Figur 5 einen weiteren Einsatzkörper im Längsschnitt ;
  • Figur 6 ebenfalls einen weiteren Einsatzkörper im Längsschnitt.
Exemplary embodiments of the weaving machine according to the invention are described in more detail below with the aid of schematic drawings, in which:
  • Figure 1 shows the principle of manufacturing a fabric on a loom with a weft insertion, in a graphical representation;
  • Figure the weft insertion organ of Figure 1, consisting of a housing and an insert body, in a diagrammatic, exploded view.
  • Figure 3 shows the insert body of Figure 2 in partial longitudinal section.
  • Figure 4 shows the insert body of Figure 3 in section IV-IV;
  • Figure 5 shows another insert body in longitudinal section;
  • Figure 6 also another insert body in longitudinal section.

Die Figur 1 zeigt im Schema die Herstellung eines Gewebes 2, beispielsweise eines Bandgewebes, aus Kettfäden 4, die zu einem Fach 6 geöffnet sind, und einem Schussfaden 8, der in das Kettenfach 6 eingetragen wird. Der Schussfaden 8 wird mittels des Schussfadeneintragorganes 10 von einer Garnspule 12 abgezogen und vom Gewebeseitenrand 14 in das Kettenfach 6 eingetragen und mit dem Webblatt 18 angeschlagen.FIG. 1 shows in the diagram the production of a fabric 2, for example a band fabric, from warp threads 4 that are open to a compartment 6 and a weft thread 8 that is inserted into the chain compartment 6. The weft thread 8 is drawn off from a yarn spool 12 by means of the weft thread insertion member 10 and inserted into the warp compartment 6 from the fabric side edge 14 and struck with the reed 18.

Das Schussfadeneintragorgan 10 weist, wie insbesondere auch in den Fig. 2 bis 4 ersichtlich ist, einen Aufnahmeschlitz 20 auf, der entgegen der Eintragrichtung weist und zum Aufnehmen und Mitführen des Schussfadens 8 dient. Das Schussfadeneintragorgan 10 enthält ein rohrförmiges Gehäuse 22, an dessen Ende ein Einsatzkörper 24 eingesetzt ist. Der Aufnahmeschlitz 20 besteht aus einem Einsatzkörperschlitz 26 im Einsatzkörper 24 und einem Gehäuseschlitz 28 des Gehäuses 22. Der Einsatzkörperschlitz 26 und der Gehäuseschlitz 28 entsprechen im wesentlichen einander und wirken zusammen. Mindestens an der dem Webblatt 18 abgewandten Seite weist der Einsatzkörper 24 eine Schneidvorrichtung 30 für den Schussfaden 8 auf. Ferner enthält das Schusseintragorgan eine Klemmvorrichtung 32 zur Aufnahme und zum Festhalten des einzutragenden Schussfadens 8. Der Einsatzkörper 24 ist an seiner Spitze spitzzulaufend ausgebildet.The weft thread insertion member 10, as can also be seen in particular in FIGS. 2 to 4, has a receiving slot 20 which points counter to the insertion direction and is used for receiving and carrying the weft thread 8. The weft insertion element 10 contains a tubular housing 22, at the end of which an insert body 24 is inserted. The receiving slot 20 consists of an insert body slot 26 in the insert body 24 and a housing slot 28 of the housing 22. The insert body slot 26 and the housing slot 28 essentially correspond to one another and interact. At least on the side facing away from the reed 18, the insert body 24 has a cutting device 30 for the weft thread 8. Furthermore, the weft insertion member contains a clamping device 32 for receiving and for holding the weft thread 8 to be inserted. The insert body 24 is tapered at its tip.

Die Klemmvorrichtung 32 enthält eine am Grunde 34 des Aufnahmeschlitzes 20 angeordnete Schraubenfeder 36, die in einer Oeffnung 38 im Einsatzkörper 24 angeordnet ist. Dabei ist diese Anordnung so getroffen, dass die Schraubenfeder koaxial zu einer quer zum Aufnahmeschlitz 20 und gegen diesen gebogene Achse 40 angeordnet ist. Dadurch öffnen sich die Windungen 42 der Schraubenfeder 36 gegen den Aufnahmeschlitz 20 zu und gestatten das Eingreifen eines Schussfadens 8. Da sich die Windungen 42 auf die dem Aufnahmeschlitz 20 abgewandte Seite zu verjüngen, können sie in dieser Richtung einen Schussfaden festklemmen, wie aus Fig. 3 hervorgeht.The clamping device 32 contains a helical spring 36 arranged at the base 34 of the receiving slot 20, which is arranged in an opening 38 in the insert body 24. This arrangement is such that the helical spring is arranged coaxially with an axis 40 which is bent transversely to the receiving slot 20 and against it. As a result, the turns 42 of the helical spring 36 open against the receiving slot 20 and permit the engagement of a weft thread 8. Since the turns 42 taper on the side facing away from the receiving slot 20, they can clamp a weft thread in this direction, as shown in FIG. 3 emerges.

Die Schneidvorrichtung 30 besteht aus einer Messerschneide 44, die im vorliegenden Falle am Einsatzkörper 24 auf der dem Webblatt 18 abgewandten Seite des Schussfadeneintragorganes 10 angeordnet ist. Die Messerschneide ragt in den Aufnahmeschlitz 20 des Schussfadeneintragorganes 10 hinein. Nicht näher dargestellte Schrauben 46 ermöglichen ein Auswechseln der Messerschneide.The cutting device 30 consists of a knife edge 44, which in the present case is arranged on the insert body 24 on the side of the weft insertion element 10 facing away from the reed 18. The knife edge protrudes into the receiving slot 20 of the weft insertion element 10. Screws 46 (not shown in more detail) enable the knife edge to be replaced.

Im Gegensatz zum dargestellten Ausführungsbeispiel kann die Messerschneide auch auf der Aussenseite des Gehäuses angeordnet sein. Ferner ist es möglich, den Gehäuseschlitz 28 zu schärfen und als Messerschneide zu verwenden.In contrast to the illustrated embodiment, the knife edge can also be arranged on the outside of the housing. It is also possible to sharpen the housing slot 28 and use it as a knife edge.

Die Fig. zeigt ein weiteres Ausführungsbeispiel eines Einsatzkörpers 48 mit abgewandelter Klemmvorrichtung 50. Letztere weist eine sich am Grund des Aufnahmeschlitzes 52 anschliessende Kammer 54 auf, in der ein Klemmkörper 56 angeordnet ist, der mittels einer Feder 58 gegen den Aufnahmeschlitz 52 vorgespannt ist. Der Klemmkörper 56 ist als Rotationskörper, vorzugsweise als Kugel ausgebildet. In die zur Aufnahme der Feder 58 dienende Kammer 60 sowie in die Kammer 54 des Klemmkörpers 56 mündet jeweils ein Flusenabführkanal 62, 64, um die beim Weben entstehenden Flusen abführen zu können. Ein Schussfaden gelangt über den Aufnahmeschlitz 52 in die Kammer 54 und verdrängt mit zunehmender Spannung den Klemmkörper 56, wobei er sich in den Spalt zwischen den Klemmkörper 56 und der Kammerwand festsetzt. Je stärker der Zug des Schussfadens wird, desto fester klemmt er in der Klemmvorrichtung ein. Bei entgegengesetzter Bewegungsrichtung des Schussfadeneintragorganes kommt der Schussfaden vom Klemmkörper 56 frei.FIG. 1 shows a further exemplary embodiment of an insert body 48 with a modified clamping device 50. The latter has a chamber 54 which adjoins the base of the receiving slot 52 and in which a clamping body 56 is arranged, which is biased by a spring 58 against the receiving slot 52. The clamping body 56 is designed as a rotating body, preferably as a ball. A lint discharge channel 62, 64 opens into the chamber 60 for receiving the spring 58 and into the chamber 54 of the clamping body 56, in order to be able to remove the lint which arises during weaving. A weft thread passes through the receiving slot 52 into the chamber 54 and displaces the clamping body 56 with increasing tension, whereby it sticks in the gap between the clamping body 56 and the chamber wall. The stronger the pull of the weft thread, the tighter it jams in the clamping device. In the opposite direction of movement of the weft insertion element, the weft is released from the clamping body 56.

Die Fig. zeigt ein weiteres Ausführungsbeispiel eines Einsatzkörpers 66, der analog jenem der Fig. ausgebildet ist, wobei jedoch jetzt die Klemmvorrichtung 68 eine etwas grössere Kammer 70 aufweist, in der zwei Klemmkörper 72 angeordnet sind, die mittels einer Feder 74 gegen den Aufnahmeschlitz 76 vorgespannt sind. Die Klemmkörper 72 bestehen zweckmässigerweise wiederum aus Rotationskörpern, beispielsweise Zylindern oder Kugeln, wobei der einzutragende Schussfaden sich zwischen den Klemmkörpern 72 festklemmen kann. Sowohl beim Festklemmen wie beim späteren Lösen rollen die Klemmkörper 72 aneinander ab.FIG. 1 shows a further exemplary embodiment of an insert body 66, which is designed analogously to that of FIG. 1, but now the clamping device 68 has a somewhat larger chamber 70 in which two clamping bodies 72 are arranged, which are pressed against the receiving slot 76 by means of a spring 74 are biased. The clamping bodies 72 expediently again consist of rotating bodies, for example cylinders or balls, the weft thread to be inserted being able to clamp between the clamping bodies 72. The clamping bodies 72 roll against each other both when clamping and when later loosening.

Die Funktionsweise der schützenlosen Webmaschine ist wie folgt.How the defenseless Webma works Schine is as follows.

Das Schussfadeneintragorgan 10 greift von dem in Fig. 1 linken Gewebeseitenrand durch das offene Kettenfach 6 und erfasst am rechten Gewebeseitenrand 14 den Schussfaden 8, indem dieser in den Aufnahmeschlitz 20 einrastet. Das Schussfadeneintragorgan wird darauf nach links bewegt, wobei es einerseits den Schussfaden 8 von der Garnspule 12 abzieht und andererseits den bereits eingewebten Schussfaden straffzieht. Dabei wird zunächst eine Schussfadenschlaufe gebildet und durch die anwachsende Spannung der Schussfaden in die Klemmvorrichtung 32 eingedrückt. Sobald der dem Gewebe zugewandte Teil des Schussfadens bei fortschreitender Bewegung des Schussfadeneintragorganes 10 eine gewisse Spannung erreicht hat, wird der Schussfaden an der dem Webblatt 18 abgewandten Seite mittels der Schneidvorrichtung 30 abgetrennt. Der abgetrennte Schenkel der Schussfadenschlaufe verbleibt im Kettenfach. Der andere Schenkel des Schussfadens 8 bleibt in der Klemmvorrichtung 32 des Schussfadeneintragorganes 10 festgeklemmt und wird mittels des Schussfadeneintragorganes 10 durch das Kettenfach 6 auf die linke Seite des Gewebes durchgezogen. Das Kettenfach 6 wechselt nun und das Webblatt 18 schlägt den eingetragenen Schlussfaden 8 an. Darauf bewegt sich das Schusseintragorgan wieder von links nach rechts und trägt den Restteil des Vorhergehenden Schussfadens in das neue Kettenfach ein. Dadurch wird der Restteil gestreckt und die so erreichte Fadenspannung zieht den Restteil des Schussfadens aus der Klemmvorrichtung 32 heraus, so dass er im Kettenfach zu liegen kommt. Das Schussfadeneintragorgan 10 bewegt sich weiter auf die rechte Seite und kann einen neuen Schussfaden 8 erfassen, worauf sich der obenbeschriebene Eintragvorgang wiederholt.The weft insertion element 10 reaches from the left side of the fabric in FIG. 1 through the open chain compartment 6 and detects the weft 8 on the right side of the fabric 14 by snapping it into the receiving slot 20. The weft insertion element is then moved to the left, on the one hand pulling the weft 8 from the yarn spool 12 and on the other hand pulling the already woven-in weft. A weft thread loop is first formed and pressed into the clamping device 32 by the increasing tension of the weft thread. As soon as the part of the weft thread facing the fabric has reached a certain tension with the progressive movement of the weft thread insertion member 10, the weft thread is cut off on the side facing away from the reed 18 by means of the cutting device 30. The separated leg of the weft loop remains in the chain compartment. The other leg of the weft thread 8 remains clamped in the clamping device 32 of the weft thread insertion element 10 and is pulled through the chain compartment 6 onto the left side of the fabric by means of the weft thread insertion element 10. The chain compartment 6 now changes and the reed 18 beats the final thread 8 entered. The weft insertion element then moves again from left to right and carries the remaining part of the previous weft thread into the new chain compartment. As a result, the remaining part is stretched and the thread tension thus reached pulls the remaining part of the weft thread out of the clamping device 32 so that it comes to rest in the warp compartment. The weft insertion element 10 continues to move to the right side and can grasp a new weft 8, whereupon the insertion process described above is repeated.

Sollen die Restteile der Schussfäden nicht in das Kettenfach eingelegt werden, so kann dies mit einfachen Mitteln verhindert werden, indem beispielsweise ein Stecher eines Rückhalters das Einziehen des Restteiles in das Kettenfach verhindert oder diesen Restteil wieder herausholt. Das Gleiche kann beispielsweise auch mittels eines Luftstromes erreicht werden.If the remaining parts of the weft threads are not to be inserted into the chain compartment, this can be prevented with simple means, for example by a prick of a retainer preventing the remaining part from being drawn into the chain compartment or taking this remaining part out again. The same can also be achieved, for example, by means of an air flow.

Das Schusseintragorgan kann, wie oben beschrieben, eine Schusstange sein, es ist aber auch möglich, das Schusseintragorgan als flexibles Band oder als Flugkörper auszubilden, dessen aktives Ende in der erfindungsgemässen Weise ausgestaltet ist.As described above, the weft insertion member can be a weft rod, but it is also possible to design the weft insertion member as a flexible band or as a missile, the active end of which is designed in the manner according to the invention.

Die obigen Ausführungen zeigen, dass die neuartige schützenlose Webmaschine einen ausserordentlich einfachen Aufbau aufweist und insofern hohe Webgeschwindigkeiten ermöglicht, wobei die Leistung der Webmaschine durch geringe Wartungs- und Einstellungszeiten weiter verbessert ist.The above explanations show that the new type of guardless weaving machine has an extremely simple structure and, in this respect, enables high weaving speeds, the performance of the weaving machine being further improved by low maintenance and adjustment times.

Claims (12)

1, dadurch gekennzeichnet, dass das Schusseintragorgan (10) mindestens einen Flusenabführkanal (62, 64) aufweist, der von der Vorder- seite bis zur Klemmvorrichtung (50) reicht.
1. A weft-introducing member for a shuttleless weaving machine, which member has a receiving slot with a clamping device for receiving and securing the weft which is to be introduced and also has a cutting device for the weft which is turned away from the comb, characterised in that the weft-introducing member (10) is designed as a tubular housing (22) with an open front end and a housing slot (28) in the housing wall, and that an interchangeable insertable body (24, 48, 66) having a slot (26) formed in its circumferential area is provided which can be inserted so far into the open front end of the tubular housing (22) that the two flanks of its slot (26) cooperate with the two flanks of the housing slot (28) to form the receiving slot (20, 52, 76) for the weft, and that, in addition, the clamping device (32, 50, 68) is located in the insertable body (24, 48, 66) at the base of its slot (26).
2. A weft introducing member as claimed in claim 1, characterised in that the receiving slot (20, 52, 76) tapers inwardly, preferably in a V-shaped manner.
3. A weft-introducing member as claimed in claim 1 or claim 2, characterised in that the clamping device (32) at the base of the receiving slot (20) includes a helical spring (36) which is preferably curved in the direction of the receiving slot.
4. A weft-introducing member as claimed in claim 3, characterised in that the helical spring (36) is arranged coaxially to an axis (40) which extends across the receiving slot and is curved towards the latter.
5. A weft-introducing member as claimed in claim 1 or claim 2, characterised in that the clamping device (50, 68) has a chamber (54, 70) which is connected to the base of the receiving slot (52, 76), and in which there is located at least one clamping body (56, 72) which is prestressed against the receiving slot (52, 76) by means of a spring (58, 74).
6. A weft-introducing member as claimed in claim 5, characterised in that two clamping bodies (72) are located in the chamber (70).
7. A weft-introducing member as claimed in claim 5 or claim 6, characterised in that the clamping body (56, 72) is designed as a rotatable body, preferably a ball.
8. A weft-introducing member as claimed in claim 1, characterised in that the cutting device is scissorlike in design, the preferably interchangeable pair of scissor blades opening in the direction of the receiving slot.
9. A weft-introducing member as claimed in claim 1, characterised in that the cutting device (30) has a preferably interchangeable knife edge (44).
10. A weft-introducing member as claimed in claim 9, characterised in that the inside edge of the housing slot is designed as a knife edge.
11. A weft-introducing member as claimed in claim 1, characterised in that the weft-introducing member (10) has at least one thread end removal passage (62, 64) which extends from the front side to the clamping device (50).
EP80810099A 1979-03-29 1980-03-24 Weft insertion means for shuttleless looms Expired EP0018320B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH294779A CH634614A5 (en) 1979-03-29 1979-03-29 PROTECTIVE WEAVING MACHINE.
CH2947/79 1979-03-29

Publications (2)

Publication Number Publication Date
EP0018320A1 EP0018320A1 (en) 1980-10-29
EP0018320B1 true EP0018320B1 (en) 1983-02-16

Family

ID=4245212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810099A Expired EP0018320B1 (en) 1979-03-29 1980-03-24 Weft insertion means for shuttleless looms

Country Status (6)

Country Link
US (1) US4350184A (en)
EP (1) EP0018320B1 (en)
CH (1) CH634614A5 (en)
CS (1) CS226012B2 (en)
DE (1) DE2925694C2 (en)
ES (1) ES8101665A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20105091U1 (en) * 2001-03-23 2002-09-05 Wangner Finckh Gmbh & Co Kg Collet for seam weaving machines

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB187084A (en) * 1921-08-26 1922-10-19 Brintons Ltd Improvements in needle looms for weaving carpets or the like
US2072161A (en) * 1933-06-02 1937-03-02 Dewas Raymond Thread carrying apparatus for weaving looms and the like
DE659180C (en) * 1934-06-02 1938-04-27 Dewas Raymond Weft insertion device
FR1122422A (en) * 1955-02-24 1956-09-06 Improvements made to weft-passing devices on looms
ES307145A1 (en) * 1964-12-09 1965-04-16 Balaguer Galobart Ramen Weft thread inserting device in weaving machines
FR1425542A (en) * 1964-12-10 1966-01-24 Loom without shuttles
DE1785467B1 (en) * 1968-09-27 1971-12-16 Guesken Fa J Hook-shaped thread doffer gripper tip for the stump insertion of weft threads in rapier looms
CH508075A (en) * 1970-06-04 1971-05-31 Saurer Ag Adolph Yarn holding device on a weft thread insertion element of a weaving machine
JPS5336498B2 (en) * 1971-08-20 1978-10-03

Also Published As

Publication number Publication date
DE2925694C2 (en) 1983-04-28
CH634614A5 (en) 1983-02-15
DE2925694A1 (en) 1980-10-02
ES490077A0 (en) 1980-12-16
ES8101665A1 (en) 1980-12-16
EP0018320A1 (en) 1980-10-29
CS226012B2 (en) 1984-03-19
US4350184A (en) 1982-09-21

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