HK1180019A1 - Loom for producing woven goods or material with an incorporated cover thread - Google Patents

Abstract

The weaving machine has a shedding motion to form a shed (3) out of warp threads (2) with an upper shed (5) and a lower shed (4), and a weft insertion device (7) for insertion of weft threads, where a reed (1) is provided for attaching incorporated weft threads. A laying device is provided for a covering thread. The warp thread laying devices (9,11) are provided with a warp laying element for laying other warp threads (8).

Description

Weaving machine for producing a woven fabric or material with an inserted cover thread

Technical Field

The invention relates to a weaving machine for producing woven material with an embedded cover yarn (covered thread).

Background

A weaving machine of the above type has been disclosed in CH 490541. Wherein the connecting yarn is arranged by a feeding needle while the tape is woven. No teaching is given as to how a needle braider can be knitted in electrically conductive yarns, in particular antenna yarns, in a more advantageous manner. US3796234 also discloses a similar technique independently.

A different way of imbedding the electrically conductive yarn is known from WO2007/071077a1 by arranging the feed needle on a shaft perpendicular to the warp direction, which shaft is connected to a first drive for performing a pivoting movement of the shaft and further to a second drive for generating an axial offset. The blade is able to enter and leave the shed as a result of the pivoting movement. Thus, the blade can move across the entire belt width.

JP 2005/015954a discloses a weaving machine which is capable of weaving in fancy yarns which are laid into or on the surface of a base fabric. The weaving machine of JP 2005/015954a is equipped with a shed forming device for the warp yarns, which is capable of picking individual warp yarns. In this case, fancy yarns are the additional warp yarns selected. Thus, the effect yarn and any additional warp yarns can be guided in the shed. Therefore, a series of fancy yarns fed from the above-mentioned additional warp and the selected fancy yarn and these warps are knitted upon the transverse movement of the fancy yarn. This means that the patterned yarns are not attached to the base fabric, but are part of the base fabric, thereby altering the fabric structure.

Disclosure of Invention

The invention aims to provide a weaving machine which is suitable for manufacturing a woven material with embedded covering yarns. Accordingly, the loom should be operable to apply the cover yarn to the woven material without significantly altering the woven material.

The above-mentioned objects are achieved by a weaving machine according to claim 1. Initially, the solution according to the invention has the result that, on the one hand, the cover thread can be knitted in the weft direction even with a transverse movement of the cover thread guide. Furthermore, it is particularly advantageous that no weaving traces are visible on the surface of the webbing by the dispersion of the movement, i.e. both the weaving and the weft inlay. In this way, contrary to the weaving machine of JP 2005/015954a, the weaving machine of the invention is able to apply a covering yarn without significantly changing the weaving material. Due to the fact that the weaving machine comprises, in addition to and independently of the laying device for at least one covering yarn, a warp laying device with a plurality of warp laying elements arranged next to each other for laying additional warp yarns, the drawback of JP 2005/015954a that the covering yarn becomes part of the base fabric and thus changes the fabric structure is avoided.

It is also very advantageous that the covering yarn can be moved and laid in any laying position on the webbing between the warp laying elements.

Advantageous embodiments of the weaving machine are described in the dependent claims.

Advantageously, the warp laying device further comprises a transverse movement device by means of which it can be moved transversely with respect to the warp threads when the warp laying device is not inserted into the shed.

According to an advantageous embodiment of the invention, the laying device comprises at least one further covering thread guide which is arranged behind the covering thread guide with respect to the warp direction and which moves transversely with respect to the warp direction.

According to a further embodiment of the invention, the device comprises at least one gripping hook capable of gripping the covering yarn when the reed is stopped. Thus, the clamping hook is guided: after the covering yarn is laid in, it can be moved away from the webbing back to the starting position.

The above embodiments relate primarily to ribbon looms. The technique of the invention can also be advantageously applied on broad-width weaving machines in which a plurality of warp laying devices are arranged parallel to the selvedge and adjacent to one another at a determined distance. Preferably, the warp yarn laying device is driven in a coupled manner. However, for some applications it is also advantageous if separate drive means are provided, so that the warp inlay devices can be driven separately and independently of each other.

The above-mentioned elements used in the invention and what is claimed and described in the following exemplary embodiments are not subject to any special restrictions with regard to their size, shape, material use and technical design, and therefore the selection criteria known in the respective field of application can be used without any restrictions.

Drawings

Examples of such looms will be described in more detail below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of a loom of a first example of the present invention illustrating the basic motion;

FIG. 2 is a schematic view of the loom of FIG. 1 illustrating the laying motion of the covering yarn guide;

fig. 3 is a schematic view of a weaving machine with a plurality of covering thread guides according to a second example of the invention;

FIG. 4 is a schematic view of a weaving machine with a clamping hook according to a third example of the invention;

fig. 5 shows a weaving machine according to an example with three warp inlay devices which are adjacent to one another and can be operated in parallel.

Detailed Description

Fig. 1 is a schematic view of a weaving machine according to a first example of the invention, showing the basic movements. In a gripper weaving machine, the warp threads 2 used for producing the webbing 10 form an upper shed 5 and a lower shed 4 for the introduction of weft threads by means of a weft insertion needle 7 or gripper. The reed 1 is arranged in a conventional manner on a woven material 10 which has been manufactured in advance so as to be able to abut against an inserted weft thread.

The warp yarn laying device 9 is inserted through the upper shed 5 into the lower shed 4. At the same time, the reed 1 moves backward. The warp inlay device 9 can be moved in the direction of the reed 1 and also down into the lower shed 4. In this embodiment, the warp yarn laying device 9 moves with the movement of the reed 1. However, the warp laying device can also be switched off or inserted at different frequencies depending on the weaving situation (binding).

The weft thread in the weft insertion needle or gripper 7 crosses the additional warp thread 8 when the warp inlay element is in the lower shed. In the embodiment shown, the weft thread in the weft insertion needle or gripper 7 is caught by the auxiliary thread. The warp inlay device 9 lifts the warp inlay elements from the lower shed 4 and the upper shed 5 and moves them together with the reed 1 into the starting position 11. The additional warp yarn 8 (in this embodiment the binder yarn) is then intercepted by the reed 1. The warp inlay should be arranged such that it never binds with the cover weft.

Fig. 2 shows an additional inlay yarn by means of a cover yarn guide. The cover thread guide 13 for the cover thread 12 can reach any laying position between the warp laying elements 14 by a transverse movement. The basic movement according to fig. 1 described above is then carried out. The cover yarn 12 may be a fancy yarn, such as: metal wires, pearl strings, stretch yarns, etc., or also functional yarns, such as: LED yarn, conductive yarn, etc.

When the warp laying device 9 is in the starting position 11, the covering thread guide 13 can be moved through the warp laying element 14 to a new laying position, for example by the action of a linear motor, a cam mechanism or the like. Depending on the desired effect and function, the covering thread guide 13 can be moved periodically or according to a freely determined weaving pattern.

The cover yarns 12 and the additional warp yarns (i.e., connecting yarns 8) are woven into the webbing 10, particularly in the weft direction. Alternatively or as an additional result, the additional warp threads 8, i.e. the connecting warp threads in the described embodiment, can also be constituted by a series of effect threads.

The warp inlay device 9 can also be moved in a transverse movement by means of one or more warp inlay elements 14, so that the covering yarn 12 is inlay and woven in the warp direction of the webbing 10. Doing so can create new weave patterns and effects. The warp inlay elements 14 are arranged adjacent to each other at a fixed mutual distance, in this embodiment equidistantly.

According to another embodiment of the invention shown in fig. 3, a plurality of covering yarn guides can be arranged in tandem.

Each cover yarn guide 13, 16 is driven by a separate drive and can be moved in the transverse direction independently of each other.

On this loom, the cover yarns 12 and 15 can intersect, thereby obtaining a new effect.

Fig. 4 shows another embodiment of the present invention. In this embodiment, a clamping hook is used.

The holding hook 17 holds the covering yarn, thereby reducing the load of the additional warp yarn 8 (i.e., the connecting yarn in the present embodiment). The clamping hook can be moved via a rotary movement or via a linear movement. With respect to the gripping hooks, two or more elements 18 may be used in a single knitting stroke. Once the covering yarn 12 is laid in, the gripping hook 17 is withdrawn from the webbing 10 to its starting position or it remains in its position until the covering yarn 12 is woven.

Fig. 5 shows a weaving machine according to an embodiment with three warp inlay devices 9 which are adjacent to one another and can be operated in parallel. These warp yarn laying devices correspond to those in the above-described embodiments, which are not shown in fig. 5 for the sake of clarity. The technique of the invention is more advantageous for use in broad-width weaving looms, in which a plurality of warp laying devices 9 (exactly three in the present embodiment) are arranged parallel to the selvedge and adjacent to each other at a determined mutual distance. In this embodiment, it can be known that a plurality of woven tapes are manufactured in parallel. If the webbing belts are of the same type (only for increasing the productivity), the individual warp yarn laying devices 9 can be driven in a coupled manner. For certain applications, it is further advantageous to provide separate drive means, for example if differently configured webbing belts are to be manufactured adjacent to each other or differently applied on the wide-width webbing belt 10, so that the warp yarn laying devices 9 can be driven and controlled separately and independently of each other.

List of reference numerals

1 Reed

2 warp of woven tape

3-shed

4 lower shed

5 upper shed

6 gripping needles or needles for crocheting

7 weft insertion needle or gripper

8 additional warp yarns as connecting or effect yarns

9 warp yarn laying device

10 mesh belt

11 start position of warp yarn laying device

12 cover yarn

13 cover yarn guide

14 warp yarn laying element

15 second cover yarn

16 second cover yarn guide

17 clamping hook

18 gripping hook member

Claims (10)

1. A weaving machine for producing a woven material (10) with an embedded covering yarn, comprising:

-shed forming means for forming a shed (3) having at least an upper shed (5) and a lower shed (4) from warp yarns (2);

-a weft insertion device (7) for inserting a weft yarn;

-a reed (1) for stopping an inserted weft yarn;

-a yarn laying device for at least one covering yarn (12);

it is characterized in that the preparation method is characterized in that,

the weaving machine further comprises a warp yarn laying device (9) having a plurality of warp yarn laying elements (14) arranged adjacent to each other for laying additional warp yarns (8);

wherein the warp laying device (9) comprises drive means for inserting a warp laying element (14) of an additional warp (8) from a starting position through the upper shed (5) into the lower shed (4) or through the lower shed into the upper shed; and wherein the warp yarn laying device is arranged such that: -making the weft insertion device (7) cross the additional warp (8); wherein the laying device comprises at least one cover thread guide (13) which is movable transversely to the warp threads (2) in a starting position (11) of the warp laying device (9) by means of a transverse displacement device.

2. Weaving machine according to claim 1, characterized in that the covering thread guide (13) is movable by the transverse movement means at each position of the shed.

3. Weaving machine according to claim 2, characterized in that the warp inlay elements (14) of the warp inlay device (9) are arranged adjacent to each other at a fixed distance.

4. Weaving machine according to claim 3, characterized in that the warp inlay elements (14) of the warp inlay device (9) are arranged adjacent to each other at equal distances.

5. Weaving machine according to any one of claims 1 to 4, characterized in that the warp laying device (9) further comprises a transverse movement device by means of which the warp laying element (14) can be moved transversely with respect to the warp threads (2) when the warp laying element (14) is not inserted in the shed (3).

6. Weaving machine according to any one of claims 1 to 4, characterized in that the laying device comprises at least one second covering thread guide (16) which is arranged behind the covering thread guide (13) with respect to the direction of the warp threads (2) and is movable transversely with respect to the direction of the warp threads (2).

7. Weaving machine according to any one of claims 1 to 4, characterized by at least one movable gripping hook (17) for gripping the covering thread (12) in order to reduce the load of the additional warp thread (8), wherein the gripping hook (17) can be retracted from the webbing (10) to its starting position after the covering thread (12) has been laid.

8. Weaving machine according to any one of claims 1-4, characterized in that a plurality of warp laying devices (9) are arranged parallel to the weaving edge and adjacent to each other at a determined distance.

9. Weaving machine according to claim 8, characterized in that the warp inlay device (9) is driven in a coupled manner.

10. Weaving machine according to claim 8, characterized in that separate drive means are provided, so that the warp laying devices (9) can be driven individually and independently of each other.