WO2011095262A1

WO2011095262A1 - Method and loom for producing woven fabrics having added weft effects

Info

Publication number: WO2011095262A1
Application number: PCT/EP2010/070868
Authority: WO
Inventors: Adnan Wahhoud
Original assignee: Lindauer Dornier Gesellschaft Mit Beschränkter Haftung
Priority date: 2010-02-06
Filing date: 2010-12-29
Publication date: 2011-08-11
Also published as: CN102844482A; CN102844482B; DE102010007048A1; EP2531639B1; EP2531639A1; JP2013518997A; JP5450836B2

Abstract

In a loom for producing woven fabrics (0) having added weft effects, an effect thread (2) fed in the warp direction above a weft thread (3) to be inserted is displaced in the weft direction (12) over a freely programmable displacement path (A) by means of a plurality of adjacent warp threads (1) drawn into different reed gaps (14). In order to interlace the effect thread (2) with the weft thread (3), the effect thread (2) is positioned beneath the weft thread (3) to be inserted and at the same time enters the open reed gaps (14) of a weaving reed device (10, 7, 7.1) that are upwardly open on one side. At the same time, a needle-shaped guide means (11) for the effect thread (2) is moved vertically and in the weft direction (12) in a plane that is located between the shedding elements (4) and the position of the weaving reed device (10, 7, 7.1) during weft insertion. The guide means (11) is displaced by an electromotive displacement drive (6) with respect to a shedding element (4), said drive driving the guide means (11) vertically.

Description

Method and weaving machine for producing fabrics with

Booster Shots effects

The present invention relates to a method and a weaving machine for producing fabrics with additional weft effects.

In weaving machines, it is known in the prior art to include additional threads running in the warp direction in such a way to the weave that certain additional impact effects are achieved. For this purpose, these effect threads are placed in the weft direction before the entry of a weft thread for each cycle of movement of the loom in another position.

Such a loom, for example, shows the device according to

EP 0 957 191. This device is characterized in that means for

Moving additional warp threads are present. These means consist in curved bars, which are arranged on supporting beams, which are downstream from the

Webblatt are arranged. A disadvantage of this arrangement is that the weft insertion is hindered by the curved rods in the area in front of the reed. An application in air-jet looms, in which a channel for guiding the weft thread to be introduced is integrated in the reed, seems impossible and even with the use of gripper elements are with this arrangement

Restrictions given.

US Pat. No. 3,796,234 and US 2009 0272 455 A1 also describe devices for moving additional warp threads or effect threads, which are likewise arranged in front of the reed in the region of the fabric edge, to which the

Weft is struck.

In EP 263 392 is also a weaving machine with devices for

Shifting of additional warp threads - so-called diagonal threads - into

Weft direction described. These devices consist in a

Embodiment in Diagonalfaden-Verschollenollen that carry by means of thread-like grooves, the diagonal threads for each cycle of the weaving machine a Rietlücke farther in the weft direction. In all embodiments of EP 263 392 shifting devices between the supply rolls for the warp threads or diagonal threads and the various shed forming elements arranged, with which the base warp threads or the diagonal threads are deflected vertically to form a shed.

The EP 263 392 also describes Webblatteinrichtungen whose reed teeth can enter and disappear in the crowd of warp threads and diagonal threads. From this entry and exit each of the complete crowd of all warp threads and diagonal threads is affected.

CH 27499 shows a device for shifting warp threads in

Weft direction, which is arranged between the reed and the shed forming elements. With this device, however, additional threads or effect threads in the weft direction can only be displaced over such warp threads and tied off with a weft thread, all together with the respective one

Effect threads are fed into one and the same Rietlücke the reed.

Finally, US Pat. No. 4,429,722 describes a device for moving warp threads in the weft direction, which is arranged between the reed and the shed elements. There are upwardly open Rietlücken present, in the effect threads and dive. The device seems only applicable for coarse effect threads with limited displacement.

The object of the present invention is to provide a method and a weaving machine for the production of fabrics with additional weft effects, in the effect threads, which are supplied in addition to the warp threads, for each cycle of the weaving machine web weave dependent within wide limits variable in

Weft direction can also be moved across several retracted into different Rietlücken warp threads and tied with the weft threads, without being hindered by additional mechanical elements between reed and fabric edge of the weft insertion. The arrangement should be suitable for air and rapier weaving machines and enable high web performance. The use should be possible with fabrics, the warp densities in the range usual

Clothing fabric, but also in mesh-like fabrics with low warp density.

The object is achieved by a method and a loom according to the independent claims.

The inventive method for producing a fabric with

Additional shot effects are based on consecutive motion cycles of a weaving machine. In this case, a movement cycle consists of the process steps already known in the prior art Forming a weaving shed bounded by warp threads by shedding elements,

Positioning an effect thread above a weft thread to be inserted,

- Move the effect thread in the weft direction by one

predetermined displacement for each cycle of motion;

- Positioning of the effect thread below the next to be entered

weft thread

- Entry of the weft thread in the shed in a weft direction

- striking the weft thread to a fabric edge by a

Web blade device that performs a stop movement with two end positions. The method is characterized in that the effect thread in the

Positioning above the weft thread to be introduced in the vertical direction emerges from a unilaterally open reed gap formed by reed teeth and, when positioned below the next weft thread to be inserted, dips into another reed gap.

Such formed Rietlücken arise when summarizing the reed teeth of a reed only at its lower end in a Rietbund, with a provided in conventional reeds upper Rietbund deleted.

To set the effect threads with the registered weft threads, the effect threads must be brought alternately into the upper or lower shed during the weft insertion.

This positioning is accomplished by placing the guide means with the effect thread over one of the shedding elements - e.g. a heald - and by one of the shed drives a shedding machine in the direction of movement of

Shedding elements thus vertically driven up and down.

For this purpose, guide means, displacement device and displacement drive are connected to one of the shedding elements.

In order to produce the movement sequence according to the described method, according to the invention, a guide means of the effect thread in the vertical direction and in the weft direction in a plane which moves between the shedding elements and the end position of the stop movement closer to the

Shedding elements is located, is arranged.

With the method, the desired additional impact effects can be achieved without disturbing the weft insertion by mechanical elements in the area in front of the reed. By dipping or dipping the effect thread, it is possible in accordance with the invention, the effect thread in the position above the

to be inserted weft thread even over several Rietlücken - and thus over one or more warp threads away- to move in firing direction.

In a preferred embodiment of the invention, the guide means on thread eyes with round, oval or slot-shaped opening through which the effect threads are guided. The different opening shapes allow an adaptation to different cross sections of the effect threads used.

Furthermore, it is particularly advantageous if the guide means is designed so that it has a wedge-shaped or conically shaped tip facing the warp threads in the region below the thread eye. The tip is supported according to the invention, that in a vertical movement the

Guide means the base warp threads apart such that adjacent warp threads each form a lane for the passage of the effect yarn when immersed in a Rietlücke. This avoids that the effect thread when entering and exiting undesirably intersects with adjacent warp threads. An advantageous embodiment of the method also provides that several effect threads are moved and positioned simultaneously.

For certain binding forms of the tissue to be produced, it may be useful that the effect thread is not positioned below the weft thread to be introduced during one or more movement cycles. There is then no bond between this effect thread and the subsequently entered weft instead. The effect thread lies in the finished fabric over the

registered weft.

Also possible is a modification of the method according to the invention, in which a plurality of effect threads are displaced in opposite directions and / or with different displacement paths in the weft direction.

This can also achieve more complex additional impact effects.

The loom according to the invention according to the independent device claim includes any known types of shingles for driving shedding elements, the vertical movement of which forms a shed bounded by warp threads. Furthermore, facilities for the entry of a weft thread in the shed in a weft direction and a Webblatteinrichtung for striking the weft thread to a fabric edge are present. Finally, this loom contains a displacement drive, which in Weft direction drives a displacement device to which according to the invention at least one guide means is provided, with which an effect thread can be moved in the weft direction and positioned vertically. In this case, different displacement paths of the effect thread in the weft direction for different movement cycles of the weaving machine can be predetermined via the displacement drive. Of course, a group of several guide means for a plurality of effect threads may also be attached to a displacement device so that they can be displaced synchronously with each other in the weft direction.

In general, the effect threads which come into consideration here run essentially in the warp direction within the weaving machine and are pulled off from a thread supply on the back side of the weaving machine.

The warp direction refers to the course of the warp threads from the back to the front of the loom, regardless of the vertical position in which the respective threads are located.

At the Webblatteinrichtung a weaving machine according to the invention, the reed teeth already described in the method are now mounted such that they form unilaterally open at the top Rietlücken, in which the effect thread on or can dive.

A further feature of the invention is that the guide means is arranged in a plane which extends between the shedding elements and those of two end positions of a stop movement of the reed teeth, which is closer to the shedding elements. This is generally the position of the reeding device with reed teeth during weft insertion.

Because of the described arrangement of the guide means in combination with the unilaterally open Rietlücken is with the invention

Weaving loom, the production of fabrics with a variety of additional weft effects without disturbing the weft insertion by mechanical elements in the area between reed teeth and fabric edge possible. In this area, no guide means of effect threads dip into the shed formed for the weft insertion through the warp threads.

With the weaving machine according to the invention, higher weaving capacities can be achieved in the production of fabrics with additional weft effects, since less consideration has to be given to the weft insertion elements when designing the sequence of movements for the guide means. In addition, there is a structure with which further advantageous embodiments are possible. The guide means are executed needle-shaped with eyelets.

In a preferred embodiment, one or more guide means are attached at one end to a needle bar. This needle bar, together with a weft direction e.g. prism-shaped linear guide the displacement device, which is fastened together with an electric motor drive as a displacement drive on the front of a heald. Of the

Displacement drive can be designed, for example, as a linear drive whose stator is integrated in the frame of the heald or in the prismatic linear guide. However, other drives are conceivable; For example, drives with movement spindles or hydraulic or pneumatic drives that can be controlled by a control device of the loom.

The shedding machine that drives the heald may be, for example, an eccentric machine. In this case, by a rotation between the eccentrics for the plain weave of the warp threads and the eccentrics for the

Effect binding, that is for the vertical movement of the effect threads, a particularly favorable timing of the shedding education can be achieved.

However, other conventional shedding machines, e.g. Shank or

Jacquard machines possible. Also a combination e.g. from Exzentermaschine for effect binding and a Jaquardmaschine for the plain weave is conceivable. It is also conceivable, the displacement device -z.B. a needle bar with in

Weft direction extending linear guide - and the associated

Displacement drive in an additional vertical linear guide in the

To store loom and connect with the strands of a jacquard machine such that the vertical movement of the effect threads can be controlled via the Jacquard machine.

The aforementioned embodiments have the advantage that no expensive additional gear, drives or controls must be used for driving the guide means in the vertical direction, because existing

Shedding elements and shingles drives can be used.

A further embodiment, however, provides that the guide means is vertically driven by one of the shed forming elements by its own independent drive.

Thus, the sequence of movements with respect to timing and with respect to the stroke of the guide means from the top to the lower compartment can be designed freely programmable in an advantageous manner. In the case of small displacement paths, it would also be conceivable to drive the guide means in the direction of firing via one of the shedding elements, ie together with the sheave. Accordingly, one or more displacement drives drive the

Displacement device not directly on, but on the shedding element - e.g. the weave, at the front of the displacement device with the

Guiding elements is arranged.

The displacement device may in this case contain elements with which a unique positioning of the guide means in the weft direction can be carried out during assembly and adjustment of the loom.

In the context of the invention, an additional advantageous embodiment results in that a plurality of guide means are associated with a displacement device and a displacement drive. It is also possible that a plurality of groups of guide means are present, to each of which a displacement device and a displacement drive are assigned. In addition, each of these groups or even each system of a plurality of such groups may each be connected to a different one of the shedding elements.

With such an arrangement, there is the advantageous possibility to drive these groups or systems of displacement devices and displacement drives in the weft direction in opposite directions and / or with different sized displacement paths. Thus, e.g.

mirror image, symmetrical additional firing effects can be achieved.

Since the guide means in the area between the rear, the shedding elements closer lying end position of the reed teeth and the

Shedding elements are, it is obvious if the effect threads, which are generally deducted from a thread supply in the back of the loom, are supplied by means of a deflection over the shedding elements away the guide means. In the course between thread supply and deflection and one of the usual Kettfadenwächter - devices for monitoring in case of yarn breakage can be arranged.

For large displacement paths across several Rietlücken away results between the point at which the respective effect thread is tied to the last registered weft thread on the fabric edge and the current, in the weft direction shifted position of the guide means of this effect thread a thread course, the warp threads of the upper shed at an angle crosses. This crossing or diagonal course can cause the effect thread when immersing in a Rietlücke at the upper end of one of the reed teeth, which limit this Rietlücke, gets stuck.

To avoid this, an advantageous embodiment of the invention provides that the reed teeth at their upper end lying at the exit of the Rietlücken one in the warp direction tapered -. wedge-shaped tapering -

Have material cross-section. The apex of this taper should be near or at the edge of the reed teeth facing the guide means.

The risk that an effect thread gets caught on a reed tooth, is also reduced by a chain in the smallest possible distance between the upper ends of the reed teeth and the tip of the guide means. This distance is selected smaller than 3 mm in an advantageous embodiment; preferred is a distance that is less than 2 mm.

In the following, advantageous embodiments of the invention will be explained in detail with the aid of the figures

Figure 1a Schematic representation of an embodiment of the weaving machine according to the invention with a view in the weft direction

Figure 1 b detail X from Figure 1 a with a view in the weft direction and with

Look in the direction of the chain

FIG. 2 is a plan view of the illustration according to FIG. 1

FIG. 3 shows a diagram of the movements of the reeding device,

Special education and leadership

Figure 4 Tissue pattern 4.1 - 4.4

Figure 5 similar to Figure 1, but in an embodiment with independent

Drive the shed element.

FIG. 6 top view of the embodiment according to FIG. 5 with drive of the FIG

Shifting device in the weft direction over the shedding element Figure 7 arrangement with two groups of guide means and

Sliders

FIG. 8 Top view of the arrangement from FIG. 7, drive of the FIG

Displacement devices on different shedding elements

FIG. 9 fabric pattern 9.1. - 9.4. provided with an arrangement according to the

Figures 7 and 8 can be generated. Figures 1 a, b and 2 show a weaving machine in a partial view

Shed drive 9 for driving shedding elements 4, by the vertical movement of a bounded by warp threads 1 shed 1 .1, 1 .2 is formed. The specialist image drives 9 known to the person skilled in the art can, for example, consist of a group of levers and rods which are located beneath the

Shedding elements 4 are arranged and the drive movements of a machine frame outside arranged not shown shedding machine to the shedding elements 4 transmitted. However, any other electromechanical, hydraulic or pneumatic devices can be used as shedding drives 9.

The shed forming elements 4 consist in the present example of known heddles with strands, through the Litzenaugen the warp threads 1 are performed. Furthermore, the skilled person also known means for entry of a weft thread 3 in the shed 1 .1, 1.2 in a weft direction 12 are present. These may be devices for mechanical weft insertion by means of wipers or grippers or means for pneumatic weft insertion. In the example shown in Figure 2 is a device with grippers, which are pushed in a known manner via not shown gear and two drive wheels from both sides of the loom in the shed. The weft thread 3 is supplied in this embodiment of a shot coil on a Vorspuler and a color picker 19 one of the two grippers and transferred to the other gripper in the machine center. Of course, the use of different weft threads for different movement cycles is conceivable. The selection and presentation of the weft threads to a gripper is e.g. by means of a color selector 19. Such designs are known to the expert for air and rapier weaving machines.

Furthermore, a Webblatteinrichtung 10,7,7.1 for striking the weft thread 3 to a fabric edge 13 is present, which consists of a Webblattlagerung 10 with reed teeth 7 and a Rietbund 7.1. These reed teeth 7 form between one side upwardly open receiving spaces, so-called Rietlücken 14, so that threads that run in the direction of the warp threads 1 from back to front through the loom, dive from above into these Rietlücken 14 and thus of the reed teeth 7 in the weft direction 12 can be performed.

It is well known to the person skilled in the art that with weft direction 12 both opposing directions which are parallel to the weft insertion direction are meant. The reed teeth 7 are attached to the Rietbund 7.1 to the Webblattlagerung 10 and lead together with this at each cycle of motion

Loom a stop movement 15 - 15.1 off. Finally, in the

present embodiment according to Figures 1 and 2, a displacement device 5 mounted with a prismatic guide on the frame of the heald, are attached to the according to Figure 2, three guide means 1 1, with which three effect threads

2 in the weft direction 12 can be moved by the path A.

By a displacement drive 6, which drives the displacement device 5, different displacement paths A of the effect threads 2 can be predetermined for different movement cycles of the weaving machine. It makes sense to use a

electromotive, freely programmable linear drive as a displacement drive 6. Thus, according to the invention can be achieved that the displacement A via a control device 8 of the loom and the displacement drive 6 for each movement cycle of the loom is freely programmable.

To the effect threads also vertically above or below the weft thread to be entered

To be able to position 3, in the present embodiment, guide means 1 1, displacement means 5 and displacement drive 6 with one of

Shedding elements 4 are connected and moved vertically with this. The shed forming element 4 is in this case by one of the above

described shingles 9 driven a shedding machine, not shown. Of course, other types of linear mechanical guidance of elements may be provided instead of the prismatic displacement device 5.

From Figure 1 it is further apparent that the guide means 1 1 is movable in a plane which is between the shedding elements 4 and that of two

End positions of a stop movement 15 - 15.1 of the reed teeth 7 runs, which is closer to the shedding elements 4; this is the position of reed teeth 7 during weft insertion.

As a result of this arrangement, in the process sequence according to the invention, the effect threads 2 can enter or fall out of the reed gaps 14 and can assume another position in the weft direction 12 that can be predetermined within wide limits for each movement cycle of the weaving machine.

In this case, from one cycle of movement to the next, a plurality of score gaps 14 can be swept by the effect threads 2 shifted in the weft direction 12. There are no mechanical elements in the area between the reed teeth 7 and the fabric edge 13 available for the leadership of the effect threads 2, so that the weft insertion can proceed undisturbed. In the event that the weft insertion is to take place pneumatically, it is also readily possible to form the front of the reed teeth 7 channel-shaped in a known manner to the

To allow transport of the weft thread 3 through this channel by means of air jet. Another aspect of the described embodiment of the invention is that for each movement cycle of the weaving machine can be specified by means of a mechanical or an electronic binding cartridge, whether the

Guide means 1 1 with the effect thread 2 during the weft insertion above (in the upper compartment) or below (in the lower compartment) of the weft thread 3 to be introduced. A mechanical binding cartridge can in a suitable choice of eccentrics of a drive mechanism -. an Exzentermaschine - or exist in a punch card of a card-controlled dobby. Modern shedding machines are known to be controlled by electronically generated and stored in the control device 8 of the loom pattern data. Together with a preprogrammed in the control device 8 individual displacement A of the effect yarn 2, which is made between the change of the effect yarn 2 from the upper to the lower compartment, are very different

Binding pattern of the additional impact effects achievable. The person skilled in the art is aware of such a mechanical or electronic binding cartridge for each

Motion cycle of the weaving machine also store more information. These include, for example, the selection and presentation of one or more

Weft threads by means of a so-called color selector 19, the weft density, the warp tension and the speed of the loom. Special effects are also possible in that no weft thread 3 is selected and entered in a movement cycle (see tissue pattern Fig. 4.1.).

Figures 1 a and 2 also show that the effect threads 2 of a

Thread reserve 16 withdrawn in the back of the loom and by means of a deflecting device 17 on the shedding elements 4 away

Guide means 1 1 are supplied. To maintain the thread tension optionally a resilient element in the thread path can be arranged. In this area, the arrangement of a thread monitor, not shown, makes sense, which turns off the loom when breaking an effect thread 2. Figures 1 a, b show guide means 1 1, which have the shape of needles with eyelets 18 and a needle point. One or more of these needles are attached at one end to a needle bar. This needle bar forms the displacement device 5 together with a linear guide.

The needle-shaped guide means 1 1 and 1 1.2 also have suture eyelets 18 with round 18, oval 18.2 or not shown slot-shaped opening through which the effect threads 2 are guided.

The different opening shapes allow an adaptation to

different cross sections of the effect threads 2 used. Fine or coarse fibers or filament yarns in the range of 1 tex to 10,000 tex can be used. The use of electrically conductive threads or optical fibers as the effect thread 2 is conceivable, which still a wealth of other effects can be generated with such fabrics.

In the figure 1 b can be seen that the needle-shaped guide means 1 1 in the region of the warp threads 1 facing tip is wedge-shaped; However, a conical tip is also conceivable. The cone-shaped or tapering region begins at a distance C from the thread eyelet 18.

It can also be seen in FIG. 1 b that the upper ends of the reed teeth 7 have a distance D from the warp threads of the upper shed 1.1 at the point at which the guide means 1 1 crosses the warp threads of the upper shed 1.1 during its vertical movement.

Finally, it can be seen that between the upper ends of the reed teeth 7 and the plane of movement, in which the guide means 1 1 are moved in

Kettrichtung one - not drawn to scale - distance E is present.

The distances C, D and E depend on the warp density and the cross-section of the effect threads 2 used. In the present embodiment, C is chosen to be greater than or equal to D.

To avoid the snagging of diagonally extending effect threads 2 as described above when immersed in a riveting gap 14, the distance E should be as small as the dimensions of the elements involved and the precision of the stop movement allow 15-15.1 just without collision.

To avoid this getting stuck also serves that the reed teeth 7 at its upper end at the exit of Rietlücke 14 a in

Have warp tapered material cross-section, as shown in detail X. Figure 3 shows diagrammatically the movements of some elements of a

Weaving machine which carries out the method according to the invention. Shown are two cycles of movement of the loom over a total of 720 angular degrees Y of a weaving machine main shaft.

The curves F show the stroke of two opposing shedding elements 4, each of which moves a bevy of warp threads into the upper shed 1.1 or lower shed 1 .2. The weft insertion not shown in the diagram takes place in the phase in which the shed 1.1, 1 .2 is open. The curve H represents the stroke of a guide means 1 1. This is also the stroke which is performed by the shedding element 4, with which the guide means 1 1 is moved vertically. In the prior art it is known that shedding machine and shingles 9 are designed so that for each shed 4 individually the vertical position in the loom and the size of the stroke H and F can be adjusted. As described above, in certain embodiments of the shedding machine also the timing between the movements F and H and with respect to the movement Y of

Weaving machine can be moved individually by the operator in the direction of travel. With 15 -15.1 the stop movement of the Webblatteinrichtung 10,7,7.1 is designated, which takes place between two weft entries.

Figures 4.1 to 4.4. show different tissue patterns

Additional shot effects, preferred with the embodiments of

Loom according to the invention can be produced according to Figures 1 and 2.

Figure 5 shows a loom with all the features of Figures 1 and 2, in which, however, the means for vertical movement of the guide means 1 1 is formed by a shedding element 4, which is driven by its own independent drive 9.5. There are any, the

One skilled in the art electromechanical, pneumatic or hydraulic drives used.

In the illustration of Figure 5 also lacks the prism guide shown in Figure 1 as part of the displacement device 5 on the frame of the heald, since the displacement device 5 in this illustration is not directly by a

Linear drive but via the shedding element, e.g. a hive in

Shot direction is shifted.

FIG. 6 shows the embodiment according to FIG. 5 in a plan view, in which it can be seen that the displacement device 5 is moved over the shedding element 4 by means of a Displacement drive 6.6 in the weft direction 12 is driven. In this case, the displacement drive 6.6 can be mounted on the machine frame. The compartmentalized element 4 - in the present case a weaving shank - is displaced in the weft direction together with the displacement devices 5 mounted thereon.

Figures 7 and 8 show an embodiment according to Figure 6, but with two groups of guide means 1 1, 1 1.7 shifters 5, 5.7 and

Displacement actuators 6.6, 6.7, wherein each of the groups is connected to another of the shedding elements 4. The planes in which each group of guide means moves can be arranged one behind the other in the warp direction so that the respective guide means 1 1 of one group can be moved unhindered by the guide means 1 1 .7 of another group in the weft direction 12.

It can also be several such groups with the same shedding element 4 to a system of guide means 1 1, 1 1.7. be connected so that all the guide means 1 1 of this system are moved vertically synchronously.

Finally, several such systems may be different

Shedding elements 4 be connected and are driven independently vertically.

By means of a corresponding specification for the displacement drives 6 or 6.7, different displacement paths A or B for the groups or systems of guide means 11, 11 can be achieved with such an arrangement.

The distance E refers in this case to the foremost, the reed teeth 7 nearest level of movement.

The groups of guide means 1 1, 1 1.7 can also be arranged so offset in the weft direction against each other, that all guide means 1 1, 1 1.7 in the same plane between shedding means 4 and rear end position of the

Move stop movement 15 - 15.1 (not shown).

Due to the possibility of driving these groups in the direction of weft in opposite directions, if necessary also with different displacement paths A and B, it is possible to use mirror-images, symmetrical or asymmetrical ones

Achieve additional firing effects or entire tissue structures, as exemplified in FIGS. 9.1. to 9.4 are shown. reference numeral

0 tissue

1 warp threads

1 .1 shed, upper shed

1 .2 shed, lower shed

2 effect thread

3 weft

4 shed elements

5, 5.7 displacement device

6, 6.6, 6.7 Displacement drive

7 reed teeth

7.1 Rietbund

8 control device

9 Shelf drive

9.5 Independent drive

10 reed storage

1 1, 1 1 .2, 1 1.7 Guide

12 weft direction

13 fabric edge

14 leaks

15, 15.1 stop movement

16 thread stock

17 deflection device

18, 18.2 Thread eyelet

19 color picker

A displacement group 5

B Displacement group 5.7

C distance needle point

D distance reed ends

E distance motion plane

F Hub Shedding elements

H stroke guide

Y loom angle degree

Claims

claims

1 . Method for producing a fabric (0) with additional weft effects by successive movement cycles of a weaving machine, the following method steps being provided:

- Forming of warp threads (1) limited shed (1 .1, 1.2), by shedding elements (4);

- Positioning of a guided by a guide means (1 1) effect thread (2), which extends within the loom substantially in the warp direction, above a weft thread to be introduced (3) and above the shed (1.1, 1 .2);

- Moving the effect yarn (2) in the weft direction (12) by a predetermined for each movement cycle displacement path (A) by a guide means (1 1), which is executed in the form of a needle with a thread eyelet (18);

- Positioning the effect thread (2) below a to be entered

Weft thread (3);

- Entry of the weft thread (3) in the shed (1.1, 1 .2);

- striking the weft thread (3) to a fabric edge (13) by a

Webblatteinrichtung (10,7,7.1), which performs a stop movement (15,15.1) with two end positions;

wherein the effect thread (2) in the positioning above the weft thread (3) to be introduced and above the shed (1.1, 1 .2) from one of reed teeth (7) of the Webblatteinrichtung (10,7,7.1) formed unilaterally upwardly open Rietlücke ( 14) emerges and immersed in positioning below the next weft thread (3) to be introduced into another identically formed Rietlücke (14), wherein the guide means (1 1) via a shedding element (4) in

Movement direction of the shedding elements (4) is driven vertically, characterized in that

the thread eye (18) of the guide means (1 1) is moved in the vertical direction and in the weft direction (12) in a plane which is between the

Shedding element (4) over which the guide means (1 1) is driven vertically, and the end position closer to the shed elements (4)

Stop movement (15,15.1) is arranged, and that

the guide means (1 1) in the displacement of the effect yarn (2) in the weft direction (12) relative to the shedding element (4) is moved over which it is driven vertically, and that the displacement path (A) via a control device (8) of the weaving machine, in which electronically generated pattern data can be stored, and an electromotive displacement drive (6) is freely programmed for each cycle of movement of the loom, and that

before immersion in a Rietlücke (14) of the effect thread (2) over several upwardly open Rietlücken (14) away in the weft direction (12) is displaced, wherein in these Rietlücken (14) one or more warp threads (1) are retracted and that in the case of vertical movement, the guide means (1 1) presses apart the warp threads (1) in such a way that adjacent warp threads (1) each form an alley for the passage of the effect thread (2) when immersed in a reed gap (14).

2. The method according to claim 1, characterized in that the plane in which the thread eye (18) of the guide means (1 1) is moved, seen in the warp direction of the upper ends of the reed teeth (7) at a distance (E) is arranged , which is smaller than 3 mm, preferably smaller than 2 mm.

3. The method according to claim 1 or 2, characterized in that

several effect threads (2) are moved and positioned simultaneously.

4. The method according to one or more of claims 1 to 3, characterized in that during one or more movement cycles of the effect thread (2) is not positioned below the weft thread to be introduced (3).

5. The method according to one or more of claims 1 to 4, characterized in that a plurality of effect threads (2) in the weft direction (12) in opposite directions and / or with different

Moving paths (A, B) are moved.

6. The method according to one or more of claims 1 to 4, characterized in that in one or more movement cycles no weft thread (3) is selected and entered.

7. The method according to one or more of claims 1 to 4 characterized by one or more movement cycles in which the position of the effect yarn (2) in the weft direction (12) is not changed.

8. loom with shedding elements (4) and with shed drives (9) through which the shed forming elements (4) are driven vertically, so that one of warp threads (1) limited shed (1 .1, 1.2) can be formed, further comprising means for Entry of a weft thread (3) in the shed (1.1, 1 .2) in one

Weft direction (12), with a Webblatteinrichtung (10,7,7.1) for striking the weft thread (3) to a fabric edge (13) by means of a stop movement (15,15.1) having two end positions, and with a displacement drive (6), in the weft direction (12) drives a displacement device (5) by means of linearly mechanically guided elements, and with a guide means (1 1) the needle-shaped with a thread eyelet (18) for guiding an effect thread (2) is executed, wherein the displacement drive (6) a displacement path (A) of the effect thread (2) in the weft direction (12) for each movement cycle of the weaving machine can be predetermined, and with a shedding element (4) via which the guide means (1 1) by one of the shedding drives (9 ) is vertically driven, and with at the

Webblatteinrichtung (10,7,7.1) attached reed teeth (7), the unilaterally open up Rietlücken (14) form, in which the effect thread (2) can dip in and out, characterized in that the guide means (1 1) linearly displaceable is attached to the displacement device (5) and that the displacement device (5) on that shedding element (4) mounted and vertically movable together with this, over which the guide means (1 1) is driven vertically, and that the thread eyelet (18) of the Guide means (1 1) is movable in a plane which between the shedding element (4), via which the guide means (1 1) is driven vertically, and the closer to the shed elements (4) lying end position of the stop movement (15, 15.1) is and that a control device (8) on the loom is present in the electronically generated pattern data can be stored and that the displacement drive (6) is carried out by an electric motor and d that the control device (8) with the

Displacement drive (6) signal is transmitted transmitting and that in the

Control device (8) of the displacement path (A) for each movement cycle is freely programmable.

9. loom according to claim 8, characterized in that the

Reed teeth (7) in the direction of their upper, at the exit of the Rietlücke (14) lying lying end in the warp direction tapered material cross-section, the tip of this taper close to or at the

Fachbildemitteln (4) facing edge of the reed teeth (7).

10. loom according to claim 8 or 9, characterized in that the plane in which the thread eye (18) of the guide means (1 1) is movable, seen in the warp direction of the upper ends of the reed teeth (7) arranged at a distance (E) is so small that it is avoided that effect threads (2) between the fabric edge (13) and guide means (1 1) diagonally cross the warp threads of the upper compartment (1 .1) when immersed in a Rietlücke (14) on get stuck on the upper end of the reed teeth (7).

1 1. Weaving machine according to one or more of claims 8 to 10, characterized in that the plane in which the thread eyelet (18) of the guide means (1 1) is movable, seen in the warp direction of the upper ends of

Reed teeth (7) is arranged at a distance (E) which is smaller than 3 mm, preferably smaller than 2 mm.

12. loom according to one or more of claims 8 to 1 1, characterized in that the guide means (1 1) in the region of the eyelet (18) in the weft direction (12) has a width which is greater than the distance between two adjacent reed teeth ( 7) forming an upwardly open Rietlücke (14).

13. loom according to one or more of claims 8 to 12, characterized in that the guide means (1 1) has a warp or wedge-shaped tip facing the warp threads (1), wherein the conical or tapered region at a distance (C) begins below the thread eye (18).

14. Weaving machine according to one or more of claims 8 to 13, characterized in that the displacement device (5) and the displacement drive (6) are arranged on the frame of a shed forming shed element (4), which by one of the shed drives (9) one

Shedding machine can be driven vertically.

15. Weaving machine according to one or more of claims 8 to 13

characterized in that the displacement device (5) and the

Displacement drive (6) on the frame of a heald trained

Shedding element (4) are arranged, which by its own

independent drive (9.5) is driven vertically.

16. Weaving machine according to one or more of claims 8 to 15,

characterized in that a plurality of guide means (1 1) on a

Displacement device (5) are mounted.

17. Weaving machine according to one of claims 13 or 14,

characterized in that one or more guide means (1 1) are fastened with one end to a needle bar and that this needle bar together with a in the weft direction (12) extending linear guide the

Shifter (5) forms, which is fastened together with the displacement drive (6) at the front of the heald.

18. Weaving machine according to one or more of claims 8 to 17,

characterized in that a plurality of groups of guide means (1 1, 1 1.7) are present, each having a displacement device (5, 5.7) and a

Displacement drive (6, 6.6, 6.7) are assigned.

19. loom according to claim 18, characterized in that

each of these groups or even each system of a plurality of such groups is connected to a respective one of the shedding elements (4).

20. Weaving machine according to one of claims 18 or 19, characterized in that these groups in the weft direction (12) also in opposite directions and / or with different displacement paths

(A, B) are drivable.