EP2730687A1 - Heald for a weaving machine, in particular a circular loom - Google Patents

Abstract

The heddle (1) has strips (2,3) that form heddle shaft. End eyelets are formed on elements (6,7) in between which thread eye (8) is formed. Securing elements are provided for connecting and securing the elements and strips. The strips are connected at connecting points above and below the thread eye. The connecting points are formed at maximum distance from the thread eye, and the maximum distance is provided to be half as far as the distance between thread eye and respective end eyelet closest to connecting point. An independent claim is included for a method for production of heddle.

Description

The present invention relates to a strand for a loom, which is particularly suitable for use in a circular loom. In addition, the strand should be set up for the use of band-shaped warp threads.

There are a variety of different known shapes and configurations of strands for different applications. For example, describes DE 23 51 795 A1 a strand for processing wires in order to produce mattress supports, for example. The strand has a Litzenschaft, which is held at its two ends in the heald. The Litzenschaft contains two shank parts, which rest against each other at least at the two end portions. To form a thread eye in the middle region of the Litzenschaftes extending cylindrical pins are inserted between the two shaft parts transverse to the direction of extension of the Litzenschaftes. Between these two pins, the thread eye is formed to guide the warp wire.

A strand known for processing band-shaped warp threads is known in EP 1 795 635 B1 described. There, the Litzenschaft is formed by a band which has a recess for forming the Fadenauges. To guide the band-shaped warp thread limiting the thread eye guide surfaces are rounded by various measures, for example by the insertion of elements with curved thread guide surfaces or by the bending of punched tongues of the Litzenschaftes adjacent to the thread eye.

Out EP 2 166 138 A1 is a jacquard strand known for use in Jacquard machines. The stranded body or Litzenschaft is there made of a round material. The round material has a flattened portion, which has an opening for use of a mailing, which is bounded by two legs, which thus represent spaced shaft parts. The Maillon can be glued between the two shank parts. On the shaft parts ribs may be formed, which engage in a groove on the Maillon in order to keep this good and safe.

EP 1 795 636 B1 shows a strand with a Litzenschaft of two approximately parallel extending band-shaped shaft parts, wherein for limiting the Fadenauges in the central region of the Litzenschaftes two in the extension direction of the Litzenschaftes spaced cylindrical pins can be provided. These pins each represent a Kettfadenführungskörper. The cylindrical Kettfadenführungskörper can be glued, welded, riveted or soldered, for example, with the band-shaped shaft parts. A similar strand is also off JP 2001-303383 A known.

For strands made from two separate pieces along the direction of extension of the stringer shaft, it is necessary to ensure that the thread eye is exactly at a desired position between the two end loops to maintain the warp thread in the desired position, depending on the shed position. The thread eye must also ensure that the warp thread is not damaged. In band-shaped warp is added that wrinkling of the warp during weaving must be prevented. It can therefore be regarded as an object of the present invention to provide a strand which meets these requirements and which can be produced simultaneously economically.

This object is achieved by a stranded wire with the features of claim 1. A method for producing the stranded wire is specified in claim 16.

The strand of the invention is particularly suitable for weaving tape-shaped warp or warp. Such warp tapes are often made of plastic, such as stretched polypropylene. Such stretched polypropylene has in its longitudinal direction, ie in the direction in which it was stretched, a high tensile strength. However, the stretching reduces the tensile strength transverse to the direction of extension of the strip. By weaving such tapes can thus be obtained in both directions very tear-resistant fabric, for example, to produce tear-resistant bags.

The stranded wire according to the invention has a strand shank comprising two separate shank parts, which are configured in particular as strip-shaped. The two shaft parts are provided as separate elements and connected indirectly in the manufacture of the strand at least by the at least one Kettfadenführungskörper. At least in sections, for example in the region of a thread eye of the strand, these two shaft parts extend in a transverse direction transversely to the direction of extension of the strand shank and transversely to a warp direction at a distance from each other. Seen in the extension direction of the Litzenschaftes this has at its two end portions in each case an end eyelet to secure the wire to a heddle or other holding device of the heald. The end loops may be present on end-piece parts which are connected to one or both shank parts in the respective end section. Alternatively, the end eyelet may also be formed directly by the shaft parts. At least in the end sections, the two shaft parts can be connected to each other in an embodiment according to the invention and preferably abut each other directly. For indirect connection can serve suitable connecting body, which extend at a connection point between the two shaft parts. The two shaft parts can thus be connected, for example, at least at one connection point by gluing and / or welding or another cohesive connection and / or mechanically non-positively and / or positively-for example by means of a riveted joint - indirectly or directly. The end portion may have a length of several centimeters measured in the extension direction, for example at most 3 to 5 cm. The two shaft parts extend in the extension direction of the Litzenschaftes at least from one end portion to the other end portion and preferably from a free end to the other free end of the Litzenschafts.

To limit the thread eye at least one Kettfadenführungskörper is inserted between the two shaft parts and connected to the two Schaffteilen. The thread eye is completely closed in the circumferential direction about a warp direction and serves to guide a warp thread. In one embodiment, the thread eye is bounded by at least one Kettfadenführungskörper on all sides. In another embodiment, the thread eye is bounded on an upper side and an opposite lower side by a respective Kettfadenführungskörper, wherein the thread eye is bounded laterally directly by the shaft parts. The at least one warp thread guiding body can be formed in one piece or multiple parts. If a single Kettfadenführungskörper used, it has both opposite in the direction of extension guide surfaces on which the warp thread is applied and can be guided by the thread eye. In a preferred embodiment, two Kettfadenführungskörper be inserted between the two shaft parts, each Kettfadenführungskörper has one of the two guide surfaces of the yarn eye and the Kettfadenführungskörper are not directly connected.

A particularly low-wear warp yarn guide is given when the plane of the opening of the yarn eye runs approximately at right angles to a plane which is aligned parallel to the opening of the end eyelets. In other words, the opening of the thread eye lies in a plane which is spanned by the warp direction and the extension direction of the Litzenschaftes and the end eyelets have an opening in a plane which is spanned by the Kettfadenrichtung and the transverse direction.

For simple and accurate positioning of the thread eye, each shaft part has at least one shaft projection produced by cutting and / or bending and / or embossing, the shaft projection projecting from one shaft part towards the other shaft part. By separating any possibility is understood to penetrate the material of the shaft portion in places and thereby divide, in particular punching and / or cutting. For each shaft projection, an associated recess is provided on the at least one warp thread guide body, into which the shaft projection engages. Thus, a positioning means can be provided via the shank projection, which predetermines the position of the warp thread guide body on the shank part. This will be a machine production the strand considerably simplified. The shank projection may alternatively or in addition to a material-locking connection with the depression also effect a frictional and / or positive connection between the warp thread guide body and the respective shank part. Thus, additionally or alternatively to a cohesive connection, a latching and / or clipping of the at least one warp thread guiding body can take place between at least two shank projections of the two shank parts. In this case, the shaft projection, for example, be elastically deformed and exert a pressing force on the Kettfadenführungskörper when manufactured compound. By a connection of the two shaft parts with a connecting element or directly to each other, the pressing force can be supported, whereby the Kettfadenführungskörper is held between the shaft parts.

If a cohesive connection is provided between the shaft parts and the at least one warp thread guide body, this can be produced by gluing and / or welding and / or other thermal joining.

In the manufacture of the strand, the warp thread guide body can be inserted exactly at the desired position between the two shaft parts such that the shaft projections engage in the associated recesses. Subsequently, a cohesive connection is preferably produced by gluing and / or welding between the warp thread guide body and the respective shaft part. In the region of this depression on the warp thread guide body, in which engages the respective shaft projection, a large area for a cohesive connection is provided. In the production of such a cohesive connection, for example, when gluing by excess adhesive or welding Unevenness or protrusions occur at the connection point. The fact that these bumps are optionally formed in the region of the depression of Kettfadenführungskörpers, there is no risk that kettfadenführende portions of the strand are affected in shape. Thus, the possibility is created to connect the at least one Kettfadenführungskörper cohesively with the shaft parts, wherein the portions of the strand where it can come into contact with a warp thread - ie the outer surface of the shaft portion and the region of the thread eye - by producing a cohesive Connection unaffected. Such a strand can be produced very easily and can also be manufactured automatically. Mold changes in the production, which can lead to increased stress or damage to a warp are avoided.

The two shaft parts of the Litzenschaftes are preferably made of a metal or a metal alloy. The at least one warp thread guide body can be made of the same material as the shaft parts. The warp thread guide bodies may also be provided with a coating to minimize the friction between the guide surface of a warp thread guide body against which the warp thread can rest and the warp thread. The at least one Kettfadenführungskörper may be made of ceramic, hard metal or plastic, in particular made of reinforced plastic - for example, a composite - exist.

The two shaft parts are preferably band-shaped, with their width measured in the warp direction at least five or ten times greater than the thickness measured in the transverse direction.

To improve the stability of the strand, that is at least a Kettfadenführungskörper preferably integrally connected to the two shank parts, in particular, this cohesive connection between the shank projection of the respective shaft portion and the respectively associated recess of Kettfadenführungskörpers is provided. The number of depressions on the warp guide body and the shaft protrusions engaging in a respective recess may vary. Multiple shaft projections can thus also be associated with a common depression on the warp thread guiding body. In preferred embodiments of the strand, each shank part for each warp thread guide body has one or two shank projections.

In preferred embodiments of the strand there are two separate warp thread guide bodies not directly connected to each other. At each Kettfadenführungskörper a guide surface is present, which serves as a bearing surface for the warp thread, wherein the warp thread depending on the subject position either on the one guide surface or on the other guide surface. The guide surfaces are viewed in warp direction preferably curved and edged and continuously executed. In the transverse direction, ie between the two shank parts, the guide surfaces are straight, in particular at each point. The height of the thread eye measured in the extension direction of the Litzenschaftes corresponds to the minimum distance between the two guide surfaces and is preferably at most 1.5 mm. The width of the thread eye in the transverse direction is in particular greater and preferably at least two to five times greater than the height of the thread eye in the extension direction of the litz shaft.

The shank projection, in one embodiment, is spaced from the two in the spanwise direction extending edges of the respective shaft part. There may be a distance to the edge of the respective shaft part between the shaft projection.

In one embodiment, the shank part can pass into the shank projection without a gap or without interruption. In this embodiment, there is no opening in the shaft part on and immediately next to the shaft projection. Such a shaft projection can be produced in particular by embossing. The non-piercing production of the at least one shaft projection on the shaft part ensures that no protruding deformations occur when producing a material connection between the shaft projection and the warp thread guide body on the outer surface of the shaft part facing away from the thread eye. In another embodiment, the shaft projection may also be formed by a tongue which is separated from the shaft part by a slot. The slot can be performed, for example, U-shaped square or rounded and expose the tongue on three sides relative to the shaft part. To make the connection, this tongue can be easily bent into the recess.

It is also possible for the at least one warp thread guide body to have a transversely extending extension, in particular in the extension of its guide surface for the warp thread. This extension engages in each case a recess or recess on the associated shaft part. About this extension, the guide surface on Kettfadenführungskörper viewed in the transverse direction can be extended into the recess of the shaft part into it. In this embodiment, no gap extending in the extension direction of the Litzenschaftes between the Kettfadenführungskörper and the respective shaft part, in which pinch a warp and damage could be. The extension preferably has a non-rotationally symmetrical cross-sectional shape. It lies in particular at least at three points and preferably flat over the entire guide surface in the recess on the shaft part. The extension preferably proceeds steplessly into the guide surface or there is a transition surface extending essentially along the adjacent shaft part within the thread eye, which connects the guide surface and the extension gap-free.

In an advantageous embodiment, the Kettfadenführungskörper tapers in the direction of extension of the Litzenschaftes from the thread eye away. For this purpose, he may, for example, have a curved or obliquely to the extension direction at least partially inclined inclined, the respective shaft part associated side surface. In one embodiment, this side surface has two surface portions, which include different angles of inclination with the direction of extent. The two surface sections in particular border directly on each other. By means of this embodiment of the warp thread guiding body, it is possible to guide the two shank parts starting from the warp thread guiding body towards the respective end eyelet so as to allow contact between the two shank parts at a small distance from the thread eye. As a result, relatively short strands can also be produced in the direction of extent E. The two shaft parts can also rest directly against one another outside the end section and / or be connected to one another, which increases the stability and torsional stiffness of the strand.

In one embodiment, the at least one warp thread guiding body can in each case have at least one flow groove in its side surface assigned to the respective shaft part to distribute adhesive. The at least one flow groove preferably extends in the warp direction. The flow groove can also absorb excess adhesive.

In an advantageous embodiment, an adhesive reservoir may be present on the warp thread guiding body, wherein in particular the recess associated with the shank projection may serve as an adhesive reservoir. The production of a cohesive connection by gluing is simplified. In particular, the adhesive reservoir may have a filling opening for the adhesive, which opens on a rear side of the warp thread guiding body. The back of the Kettfadenführungskörpers is remote from the guide surface for supporting the warp thread.

It is also advantageous if the adhesive reservoir is fluidly connected to the at least one flow groove, so that there existing adhesive can be distributed over the flow groove.

• Zunächst werden die beiden Schaftteile bereitgestellt, beispielsweise aus einem platten- oder folienförmigen Ausgangsmaterial ausgestanzt oder ausgeschnitten. Dabei können die Endösen als Aussparungen in jedem Schaftteil bereits vorgesehen sein. Beim Ausstanzen oder Ausschneiden der Schaftteile oder in einem nachfolgenden Bearbeitungsschritt wird der wenigstens eine Schaftvorsprung an jedem Schaftteil durch Trennen und/oder Biegen und/oder Prägen ausgebildet. Beispielsweise kann bei einem Ausführungsbeispiel ein kombiniertes Trennen - insbesondere Stanzen - und Biegen zur Ausbildung des Schaftvorsprungs dienen. Alternativ hierzu kann ein Schaftvorsprung durch Prägen durchbrechungslos am Schaftteil erzeugt werden. Die beiden Schaftteile können zumindest in den beiden Endabschnitten aneinander angelegt und miteinander verbunden werden, beispielsweise durch eine stoffschlüssige Verbindung wie etwa Kleben und/oder Schweißen. Diese Verbindung kann alternativ auch nach dem Anbringen des wenigstens einen Kettfadenführungskörpers hergestellt werden.

A strand having the features described above can be manufactured as follows:

• First, the two shaft parts are provided, for example punched or cut out of a plate-shaped or sheet-shaped starting material. The end eyelets can already be provided as recesses in each shaft part. When punching or cutting out the shaft parts or in a subsequent processing step, the at least one shaft projection is formed on each shaft part by cutting and / or bending and / or embossing. For example, in one embodiment, a combined separation - in particular punching - and bending serve to form the shaft projection. Alternatively, a shaft projection can be perforated by stamping be generated on the shaft part. The two shaft parts can be applied to each other at least in the two end portions and connected to each other, for example by a material connection such as bonding and / or welding. This connection may alternatively be made after attaching the at least one Kettfadenführungskörpers.

To form the thread eye, at least one and preferably two warp thread guiding bodies are arranged between the two shaft parts and fastened there. The shaft projection serves to specify the position of the Kettfadenführungskörpers and / or its orientation relative to the shaft portion. The warp thread guide body is thereby arranged with its recesses between the shank parts in such a way that the at least one shank projection present on each of the shank parts engages in the respectively assigned recess. To produce a cohesive connection, adhesive can be introduced into an adhesive reservoir on the warp thread guide body before or after the warp thread guide body is arranged between the shaft parts, which can be formed, for example, by the depression.

• Figur 1 ein erstes Ausführungsbeispiel einer erfindungsgemäßen Litze in perspektivischer Ansicht,
• Figur 2 einen zur Begrenzung des Fadenauges verwendeten Kettfadenführungskörper des ersten Ausführungsbeispiels nach Figur 1 in einer schematischen Ansicht in Kettfadenrichtung,
• Figur 3 der Kettfadenführungskörper aus Figur 2 in einer perspektivischen Darstellung,
• Figur 4 eine alternative Ausführungsform eines Kettfadenführungskörpers in perspektivischer Darstellung,
• Figur 5 eine weitere alternative Ausgestaltungsmöglichkeit des Kettfadenführungskörpers in perspektivischer Darstellung,
• Figur 5a eine abgewandelte Ausführung des Kettfadenkörpers nach Figur 5 in perspektivischer Darstellung,
• Figur 6 eine schematische Teildarstellung eines zweiten Ausführungsbeispiels einer Litze in einem Querschnitt im Bereich des Fadenauges,
• Figur 7 eine schematische Teildarstellung eines dritten Ausführungsbeispiels einer erfindungsgemäßen Litze in einem Querschnitt im Bereich des Fadenauges und
• Figur 8 eine schematische Teildarstellung eines vierten Ausführungsbeispiels einer erfindungsgemäßen Litze.

Advantageous embodiments of the invention will become apparent from the dependent claims and the description. The description is limited to essential features of the invention. The drawing is complementary. Hereinafter, embodiments of the invention will be explained in detail with reference to the accompanying drawings. Show it:

• FIG. 1 A first embodiment of a strand according to the invention in a perspective view,
• FIG. 2 a Kettfadenführungskörper the first embodiment used to limit the thread eye FIG. 1 in a schematic view in the warp direction,
• FIG. 3 the Kettfadenführungskörper FIG. 2 in a perspective view,
• FIG. 4 an alternative embodiment of a Kettfadenführungskörpers in perspective view,
• FIG. 5 a further alternative embodiment of the Kettfadenführungskörpers in perspective view,
• FIG. 5a a modified embodiment of the warp thread according to body FIG. 5 in perspective,
• FIG. 6 FIG. 2 a schematic partial representation of a second exemplary embodiment of a strand in a cross section in the area of the thread eye, FIG.
• FIG. 7 a schematic partial view of a third embodiment of a strand according to the invention in a cross section in the region of the thread eye and
• FIG. 8 a schematic partial view of a fourth embodiment of a strand according to the invention.

In the FIGS. 1 to 3 a first embodiment 10a of a strand 10 is illustrated. The strand 10 serves to guide a warp thread during weaving. The warp thread runs through a thread eye 11 of the strand 10. The strand 10 is arranged in a weaving sheaf, not shown, of the weaving machine, which moves vertically to bring the guided through the thread eye 11 of the strand 10 warp thread in a desired shed position. The strand 10 described here is used in particular for weaving tape-shaped warp threads, which are generally used in technical fabrics. In particular, it is envisaged to process plastic tapes, for example of stretched polypropylene, into a fabric. Depending on their manufacturing process, the plastic strips in some cases have a higher tensile strength in their direction of extension than transversely thereto. The warp thread must therefore not be loaded too much in a transverse direction transverse to the warp direction K in order to avoid damage. In the produced fabric, the force acting in the transverse direction on the warp thread is absorbed by the weft threads, so that an overall tear-resistant fabric is formed. The strand 10 according to the invention is also particularly suitable for use in circular looms in which tubular fabrics are produced.

In all embodiments, the strand 10 has a strand shank 12, which is made of two separate example according to band-shaped shaft parts 13. The shaft parts 13 extend in an extension direction E completely between the two free ends 14 of the Litzenschaftes 12. The free ends 14 are located at one end portion 15 of the Litzenschaft 12, in each case an end lug 16 for attachment of the wire 10 to a Litzentragschiene of the weave shaft is present. The end eye 16 can - as in the first embodiment 10a of the strand 10 shown - annular closed as an O-shaped end eye 16 is executed. Alternatively, the end eyelet 16 may be partially open at a longitudinal side extending in the direction of extent E, whereby a C-shaped or a J-shaped end eyelet is obtained.

In the two end portions 15, the band-shaped shaft parts are applied directly flat against each other and connected areally or in places. This connection is preferably made cohesively, for example by gluing and / or welding. At the in FIG. 1 illustrated first embodiment 10a of the strand 10, the two shaft parts 13 are not connected to each other outside the end portion 15 and arranged according to example in a transverse direction Q transverse to the extension direction E and transversely to a warp direction K at a distance from each other. The transverse direction Q and the extension direction E span a plane in which the passage opening of the thread eye 11 is located. The warp direction K is oriented at right angles to the extension direction E and to the transverse direction Q. Of course, depending on the subject position, it may well be possible for the warp thread to pass obliquely through the thread eye 11. The warp direction K is here the direction which runs at right angles to the opening plane defined by the thread eye 11.

The end eyelets 16 are formed directly by recesses in the two band-shaped shaft parts 13 in the preferred embodiments of the strand 10 described here. They can be produced, for example, when punching or cutting out the shaft parts 13 from a starting material. The shaft parts 13 consist, for example, of a metal or a metal alloy. Alternatively, the shank parts 13 could also consist of a plastic and / or a composite material.

To form the thread eye 11 is located between the two shank parts 13 at least one warp thread guide body 20 which connects the two shaft parts 13 in the transverse direction Q with each other. In the preferred exemplary embodiments described here, the stranded wire 10 has two warp thread guiding bodies 20 which are arranged at a distance from each other in the direction of extent E and which are executed separately from one another and are not directly connected to one another. Each of the two Kettfadenführungskörper 20 has on its other Kettfadenführungsführörper 20 side facing a guide surface 21 which serves as a bearing surface for the guided through the strand 10 warp thread. The guide surface 21 is viewed in the warp direction K convexly curved. In the transverse direction Q, the guide surface 21 has a straight course. The guide surface 21 extends in the transverse direction Q completely between the two shaft parts thirteenth

In the illustrated embodiments, the two Kettfadenführungskörper 20 are designed to limit the thread eye 11 identical. The strand 10 is symmetrical to a longitudinal center plane, which is spanned by the warp direction K and the extension direction E.

As a modification to the exemplary embodiments described here, it would also be possible to use only one warp thread guide body 20, which binds the thread eye 11 and encloses it annularly. The width of the thread eye 11 is adapted to the width of the web-shaped warp thread to be woven, so that the width of the thread eye 11 measured in the transverse direction Q is equal to or only slightly greater than the width of the band-shaped warp thread. Characterized in that in the embodiments, two separate Kettfadenführungskörper 20 are used and the thread eye in the transverse direction Q is not limited by one or both Kettfadenführungskörper, but by the two shaft parts 13, the dimensions of the strand 10 in the transverse direction Q can be very small. This has the advantage that the density of the warp threads for the fabric to be produced is correspondingly large.

At each shaft portion 13, at least one shaft projection 22 is provided for each of the warp thread guiding bodies 20. The shaft projection 22 of the first embodiment 10a of the strand 10 is particularly in the Figures 2 and 3 to recognize. In the first embodiment 10 a, exactly one shaft projection 22 is provided on each shaft part 13 for each warp thread guiding body 20. The shaft projection 22 is formed from the material of the respective shaft part 13 by a deformation. In the first embodiment 10a, the shaft projection 22 is made by cutting and bending. At the desired position for attaching the Kettfadenführungskörper 20 a tongue 23 is exposed at each shaft portion 13 with a free end 23 a, for example by punching or cutting, which is then bent out of the plane of the shaft portion 13 and thereby forms the shaft projection 22. The tongue 23 is separated at its free end 23a and on two opposite longitudinal sides of the remaining material of the shaft portion 13, whereby around the tongue 23, so to speak a U-shaped slot is formed. At the free end 23 a opposite fixed end 23 b, the tongue 23 is seamlessly and without joints connected to the shaft portion 13. It is understood that other slot shapes are possible. In FIG. 1 It can be seen that the tongues 23 formed in a shaft part 13 for fastening the two warp thread guiding bodies 20 face each other with their free ends 23a.

In FIG. 1 are only two of the shaft projections 22nd to recognize. On the side facing away from the viewer shaft extensions 23 are also present in the respective other shaft part 13, which are not shown in the drawing. As explained, the strand 10 is designed symmetrically to its longitudinal center plane.

At each Kettfadenführungskörper 20, a recess 25 is provided, in which the at least one associated shaft projection 22 can engage. In the first embodiment 10 each shaft projection 22 is assigned a separate recess 25. In a recess 25, alternatively, a plurality of shaft projections 23 could engage, if for mounting or positioning of the warp thread guide body 20 each have a plurality of shaft projections 22 are provided on each shaft part 13, as for example in the embodiment according to FIG FIG. 8 the case is.

The Kettfadenführungskörper 20 of the first embodiment 10a of the strand 10 thus has two recesses 25, which are each arranged in the transverse direction Q opposite sides. Each recess is open to a side surface 26 of the warp thread guide body 20. Each side surface 26 of Kettfadenführungskörpers 20 is associated with a shaft portion 13 and is at least partially on this.

The shape or the contour of the recess 25 can be selected depending on the shape and contour of the shaft projection 22. In the first embodiment 10a of the strand 10, the respective recess 25 does not correspond to the dimensions of the shaft projection 22. The dimensions of the recess 25 are, for example, at least in one or two spatial directions greater than that of the shaft projection 22. The width of the recess 25 measured in Kettfadenrichtung K can Width of the shaft projection 22 correspond. The Width of the shaft projection 22 is smaller than the width of the band-shaped shaft part 13 measured in the warp direction K. The recess 25 is contoured approximately cuboid in the first embodiment 10a.

In the first exemplary embodiment 10a of the strand 10, each warp thread guide body 20 has an extension 27 protruding in the transverse direction Q on both side surfaces. This extension 27 engages in a recess 28 on the shaft portion 13, which is formed as an example according to the opening and may alternatively be designed as a break-free recess. The recess 28 may be formed by the free cutting and inward bending of the tongue 23. It is possible, when exposing the tongue 23 to enlarge the recess 28 in addition to cutting out or punching out an area following the free end 23 a of the tongue 23, which belongs to the recess 28. The length of the extension 27 corresponds at most to the thickness of the shaft part 13 measured in the transverse direction Q, so that the extension 27 does not protrude from the recess 28 of the shaft part 13 on the outer side 12a of the Litzenschaftes 12 facing away from the thread eye 11. He can flush with the shaft portion 13, as in particular in the Figures 2 and 3 illustrated.

In the embodiment, the width of the extension 27 and the width of the recess 28 in each case measured in the warp direction K match. In particular, this width may also be identical to the width of the shaft projection 22 or the tongue 23. The extension 27 has at least one and, for example, two parallel flat sides 29, which are provided in the warp direction K on opposite sides of the extension 27 and preferably each abut an edge of the recess 28. In this way, the Kettfadenführungskörper 20 against rotation and in its orientation defined on the shaft portion 23.

In some embodiments described here, the extension 27 is steplessly and without edges into the guide surface 21. Following the guide surface 21, the extension 27 is therefore curved in the warp direction K corresponding to the guide surface 21. As a result, the guide surface 21 is, so to speak, stepped and edged without extension through the extension 27 into the recess 28. Alternatively, in all embodiments, there is also a transition surface 27a extending essentially along the adjacent shaft part 13 within the thread eye 11, which connects the guide surface 21 and the extension 27 without gaps (FIG. FIG. 5a ). The transition surface 27a is designed gap-free. Both embodiments have the advantage that in the extension direction E no gap can occur between the inside of the thread 30 facing the inner side 30 of the shaft part 13 and the guide surface 21. In such a gap, the warp thread could jam and / or be damaged.

The width of the Kettfadenführungskörpers 20 measured in the transverse direction Q decreases, starting from the guide surface 21 in the direction of extension E from. The warp thread guide body 20 thus tapers, starting from the thread eye 11, toward the end eye 16. The side surfaces 26 of the Kettfadenführungskörpers 20 are inclined in the first embodiment 10a of the strand 10 obliquely to the extension direction E. The side surfaces 26 have, for example, no constant constant inclination, but a first surface portion 26a and a second surface portion 26b. The two surface portions 26a and 26b immediately adjoin one another. The first surface portion 26a terminates with a parallel to the extension direction E. a first inclination angle α1 and the second surface portion 26b have a different inclination angle α2. The second inclination angle α2 is greater in magnitude than the inclination angle α1. The second surface portion 26b immediately adjoins the rear face 31 of the warp thread guide body 20 opposite the guide surface 21. The first surface section 26a extends from the second surface section 26b to the guide surface 21. Both surface portions 26a, 26b are divided by the recess 25 and the extension 27 into respectively spaced partial regions, wherein, according to the example, the extension 27 is arranged between the two partial regions of the first surface segment 26a. At the extension 27, the recess 25 closes example according to directly.

As in FIG. 2 illustrated, the guide body 20 can only lie flat against the respective associated shaft portion 13 along the first surface portion 26a, while between the second surface portion 26b and the shaft portion 13, an example wedge-shaped gap is present.

In the preferred exemplary embodiments described here, the warp thread guide bodies 20 are connected in a material-bonded manner to the shaft parts 13. For this purpose, the warp thread guiding body 20 has an adhesive reservoir 35, which is open towards the respective side face 26. In the first embodiment 10a of the strand 10 according to the FIGS. 1 to 3 This adhesive reservoir 35 is formed by the recess 25. For the material connection of the warp thread guide body 20, adhesive is filled in the adhesive reservoir 35, either before the warp thread guide body 20 is connected to the lace shank 12 or after the preliminary connection or positioning by the Shaft projections 22 and the recesses 25 is made. A cohesive connection within the recess 25 has the advantage that the amount of adhesive must be dosed only approximately. Excess adhesive remains in the adhesive reservoir 35 formed by the recess 25. Shape deviations within the thread eye 11 or in the area of the outer side or outer surface of the Litzenschaftes 12 are avoided. Wherever the shank shaft 12 comes into contact with a warp thread, such deviations in form or unevenness can lead to increased stress on the warp threads and even damage. This is avoided in the strand 10 described here.

At the in FIG. 1 described embodiment 10a of the strand 10, other Kettfadenführungskörper 20 can be used. Further embodiments of Kettfadenführungskörper 20 are in the FIGS. 4 and 5 illustrated. The one related to the FIGS. 1 to 3 described construction of the strand 10 may correspond to the first embodiment 10a, so that reference is made to the explanations to the first embodiment 10a. Concrete deviations from this embodiment through the use of modified chain guide bodies 20 are explained below.

While at the in the FIGS. 1 to 3 shown warp thread guide body 20 of the extension 27 measured in the warp direction K is smaller than the maximum width of the Kettfadenführungskörpers 20, so corresponds in the two embodiments according to FIGS. 4 and 5 the maximum width of the extension 27 of the maximum width of the Kettfadenführungskörpers 20. The adjoining the extension 27 and provided for engagement with the respective shaft portion 13 side surface 26 is in the embodiments according to the FIGS. 4 and 5 not inclined with respect to the extension direction E, but runs in a plane which is spanned by the extension direction E and the warp thread direction K. In a modification to the illustrated embodiments, the side surface 26 could also be inclined as in the first embodiment, wherein the inclination of the side surface 26 may be constant or different in size as in the first embodiment in different surface portions.

The recess 25 or the adhesive reservoir 35 is in the embodiment according to FIG. 4 executed in the form of a cone segment. The size of the recess 25 and the adhesive reservoir 35 decreases starting from the back 31 along the side surface 26 to the extension 27 out. At the in FIG. 5 illustrated embodiment, the recess 25 and the adhesive reservoir 35 is substantially cuboid.

In all embodiments, the adhesive reservoir on the back 31 has an orifice 36. This mouth 36 on the back 31 presented a filling opening 37 for adhesive. Over the filling opening 37, adhesive can be filled when the warp thread guide body 20 is positioned by the shaft projections 22 or temporarily fixed between the two shaft parts 13. In this case, the shaft projection 22 is integrally connected in the recess 25 with the Kettfadenführungskörper 20.

In order to achieve a cohesive connection between the Kettfadenführungskörper 20 and the shaft parts 13 outside the recess 25, has in FIG. 4 illustrated embodiment, one or more flow grooves 38 in the side surface 26. The flow grooves 38 run in the embodiment parallel to each other in warp direction K. In the embodiment according to FIG. 4 There are six flow grooves 38 in each side surface 26. The flow grooves 38 may have any cross-sectional shape and are designed in cross-section example, according to semicircular or circular segment. The flow grooves 38 open into the adhesive reservoir 35, so that they are fluidly connected to the adhesive reservoir 35. In the exemplary embodiment, each flow groove 38 penetrates the side surface 26 from the adhesive reservoir 35 to an edge of the side surface 26. It is also possible that the flow grooves 38 are closed towards the edge of the side surface 26 of the warp thread guide body 20 or end away from this edge at a distance that leakage of adhesive through the flow grooves 38 is avoided.

Also at the in FIG. 5 shown warp yarn guide body 20 may be at least one flow groove 38 in each side wall 26 may be present. In the in the FIGS. 1 to 3 illustrated embodiment, at least in the first surface portion 26a of the side surface 26 may also be present at least one flow groove.

The at least one flow groove 38 may deviate from the in FIG. 4 illustrated embodiment also have a different orientation than in the warp direction K. Preferably, each flow groove runs rectilinearly starting from the adhesive reservoir 35, wherein in principle also curved or kinked courses are conceivable.

In the context of the FIGS. 1 to 3 described first embodiment 10a of the strand 10, the shaft portion 13 in the region of the shaft projection 22 openings, slots or recesses. Alternatively, the shaft projection 22 may be formed by a deformation and be circumferentially gap-free and without seam and joint connected to the remaining shaft portion 13, as in the second embodiment 10b after FIG. 6 , the third embodiment 10c according to FIG. 7 and the fourth embodiment 10d according to FIG FIG. 8 the case is. In these three embodiments, the shaft projections 22 are formed by example according to knob-shaped indentations in the shaft parts 13. On the respective Kettfadenführungskörper 20 associated page are formed by the embossing example according nub or spherical segment-like shaft projections 22, while on the opposite outer side 12a of the Litzenschaftes indentations 40 are formed.

At the in FIG. 6 illustrated embodiment, the Kettfadenführungskörper 20 are formed by pipe sections 41. The limited by the pipe section 41 cylindrical cavity represents the recess 25, which is associated with the shaft projections 22 of both shaft parts 13 in this embodiment. Also in this embodiment, the recess 25 serves as an adhesive reservoir 35th

The warp thread guiding bodies 20 have a cylindrical shape both in the second embodiment 10b of the strand 10 and in the third embodiment 10c of the strand 10. The guide surface 21 on each Kettfadenführungskörper 20 is thereby formed by a portion of the cylinder jacket surface. The shape and configuration of the recess 25 and the recesses 25 of each Kettfadenführungskörpers 20 is basically arbitrary. While in the second embodiment 10b of the strand 10, a single cylindrical recess 25 is provided on each warp thread guide body 20, in the third embodiment 10c of the strand 10, each warp thread guide body 20 has a prismatic or pyramidal recess 25 in each Side surface 26, which can also serve as an adhesive reservoir 35.

The fourth embodiment 10d of the strand 10 is shown in FIG FIG. 8 illustrated schematically. There, in contrast to the previous embodiments, each shaft part 13 has more than one shaft projection 22 per Kettfadenführungskörper 20. The recesses 25 present in the warp guide body 20 are adapted to the shape and size of the shank projections 22, whereby a positive connection between the shank projections 22 and the respective recess 25 can be formed. Alternatively, an adhesive gap between the wall of the respective recess 25 and the associated shaft projection 22 may be provided, so that the recesses 25 may also serve as Klbstoffreservoir 35. According to the example, each shaft projection 22 is assigned a recess 25.

The warp thread guide bodies 20 have, as in the other embodiments, also in the fourth exemplary embodiment 10d of the strand 10, a guide surface 21 which runs curved in the warp direction K. This is provided on a guide portion 42 of the Kettfadenführungskörpers 20. The guide section 42 extends between the two shaft parts 13 between the two guide portions 42 of the two Kettfadenführungskörper 20, the thread eye 11 is formed.

Each Kettfadenführungskörper 20 has two transverse to the guide portion 42 projecting leg 43, where the side surface 26 of the Kettfadenführungskörpers 20 is present. Each leg 43 is associated with a shaft portion 13 and is applied to this. The Kettfadenführungskörper 20 thus has a U-shaped configuration.

The invention relates to a stranded wire 10, which is provided and arranged in particular for weaving band-shaped warp threads. The strand 10 has a strand shank 12, which is formed by the two shaft parts 13. The shaft parts 13 are directly applied to each other in a respective end portion 15 of the Litzenschaftes 12 and connected to each other. In this end portion 15 are also the end eyelets 16 of the strand 10. In order to form a thread eye 11, two separate Kettfadenführungskörper 20 are inserted between the shaft parts 13 between the two shaft parts 13. In order to determine the position of the Kettfadenführungskörper 20 relative to the Litzenschaft 12 is at each shaft portion 13 for each Kettfadenführungskörper 20 at least one shaft projection 22 by cutting and then bending or piercing-free produced by embossing. The shaft projection 22 engages in an associated recess 25 of the Kettfadenführungskörpers 20, wherein preferably between the shaft projection 22 and the Kettfadenführungskörper 20 in the recess 25 is made a cohesive connection.

LIST OF REFERENCE NUMBERS

10

braid

10a

first embodiment of the stranded wire

10b

second embodiment of the stranded wire

10c

third embodiment of the strand

10d

fourth embodiment of the stranded wire

11

thread eye

12

heald rod

12a

Outside of the Litzenschaftes

13

shank part

14

free end of the Litzenschaftes

15

end

16

end loop

20

Kettfadenführungskörper

21

guide surface

22

shaft protrusion

23

tongue

23a

free end of the tongue

23b

tight end of the tongue

25

deepening

26

Side surface of Kettfadenführungskörpers

27

extension

27a

Transition surface

28

recess

29

flat side

30

Inside of the shaft part

31

Rear of Kettfadenführungskörpers

35

adhesive reservoir

36

muzzle

37

fill opening

38

flow groove

40

concavity

41

pipe section

42

guide section

43

leg

α1

first inclination angle

α2

second inclination angle

e

extension direction

K

warp

Q

transversely

Claims (16)

Wire (10) for a weaving machine, in particular a circular loom,
with a Litzenschaft (12) having at its two end portions (15) each have an end eye (16) and the two at least partially spaced apart extending separate shaft parts (13),
with at least one warp thread guide body (20) which is arranged between the two shaft parts (13) and delimits a thread eye (11) for a warp thread,
wherein there is at least one shank projection (22) made by cutting and / or bending and / or embossing on each shank part (13), which engages in a respective associated recess (25) on the warp thread guide body (20) to guide the warp thread guide body (20) on Position and / or fix the litz shaft (12). Litz according to claim 1,
characterized in that the two shaft parts (13) are band-shaped. Litz according to one of the preceding claims,
characterized in that the at least one Kettfadenführungskörper (20) is integrally connected to the two shaft parts (13). Litz according to one of the preceding claims,
characterized in that the Kettfadenführungskörper (20) has the thread eye (11) or that two in a direction of extension (E) of the Litzenschaftes (12) spaced-apart warp thread guide bodies (20) delimit the thread eye (11) at an upper side and a lower side. Litz according to one of the preceding claims,
characterized in that the shaft projection (22) is circumferentially gap-free connected to the shaft part (13). Litz according to one of claims 1 to 4,
characterized in that the shaft projection (22) is formed by a tongue (23) which is exposed from the shaft part (13) by cutting. Litz according to one of the preceding claims,
characterized in that the at least one Kettfadenführungskörper (20) on both sides each have an extension (27) which engages in a recess (28) on each associated shaft part (13). Litz according to claim 7,
characterized in that the extension (27) merges steplessly into a guide surface (21) serving for supporting the warp thread, or a transition surface (27a) extending essentially along the adjacent shaft part (13) within the thread eye (11) is present the guide surface (21) and the extension (27) connects gap-free. Litz according to one of the preceding claims,
characterized in that the at least one Kettfadenführungskörper (20) in the extension direction (E) of the Litzenschaftes (12) from the thread eye (11) tapers away. Litz according to claim 9,
characterized in that the at least one Kettfadenführungskörper (20) has a relation to the extension direction (E) at least partially oblique or curved extending side surface (26). Litz according to claim 10,
characterized in that the side surface (26) has a first surface portion (26a) and a second surface portion (26b) having opposite the extension direction (E) different inclination angle (α1, α2). Litz according to one of the preceding claims,
characterized in that the at least one Kettfadenführungskörper (20) in its the respective shaft part (13) associated side surface (26) each having at least one flow groove (38) for the distribution of adhesive. Litz according to one of the preceding claims,
characterized in that the at least one warp thread guide body (20) has an adhesive reservoir (35) open to its side face (26) associated with the respective shaft part (13). Litz according to claim 13,
characterized in that the recess (25) on the at least one Kettfadenführungskörper (20) serves as an adhesive reservoir (35). Litz according to claim 14 or 15,
characterized in that the adhesive reservoir (35) is formed on a back side (31) of the warp thread guide body (20), that of a support for the warp thread Guide surface (21) facing away from, opens at a filling opening (37). A method for producing a stranded wire (10) for a loom, in particular a circular loom, wherein the stranded wire (10) has at its two end portions (15) in each case one end eyelet (16) and the two at least in sections at a distance and wherein the strand (10) comprises at least one warp thread guiding body (20) which is arranged between the two shaft parts (13) and delimits a thread eye (11) for a warp thread, comprising the following steps: - Providing the shaft parts (13) of the Litzenschaftes (12), - Producing at least one shaft projection (22) by cutting and / or bending and / or embossing on each shaft part (13) and connecting the two shaft parts (13) at least in the two end portions (15) of the Litzenschaftes (12) - arranging and / or fixing the at least one Kettfadenführungskörpers (20) between the shaft parts (13), such that the at least one shaft projection (22) of each shaft part (13) engages in a respective associated recess (25) on Kettfadenführungskörper (20).

Images