DE3134685A1 - Method and device for transporting away the projecting selvedge weft yarns of fabrics produced on shuttleless looms - Google Patents

Abstract

Method for transporting away the projecting selvedge weft yarns of fabrics produced on shuttleless looms, in which at least two running transport yarns guided laterally of the fabric selvedge grasp the selvedge weft yarn to form a shed, as in the weaving operation, the selvedge weft yarn is cut off after being grasped by the transport yarns, and the transport yarns are then twisted with one another by executing a complete rotation of the transport yarns after each weft insertion. <IMAGE>

Description

Method and device for transporting the protruding edge weft threads from shuttleless looms manufactured fabrics.

The invention relates to a method and a device for transporting away the protruding edge weft threads from auC Shuttleless weaving machines.

In fabrics that are produced on shuttleless looms, the weft threads are cut after a Leno edge is attached to the edge of the fabric to prevent the fabric from fraying at this point. Since the cut threads are under tension before cutting, there is a risk that the fabric edge through the Weft thread residue turns out unclean, but especially runs into the leno edge.

To avoid this, it is known to use the weft threads from to interweave the side facing away from the leno edge and this interwoven piece after cutting through the edge weft threads to be transported away in order to finally destroy it.

However, this way of working requires the production of a complete one Piece of tissue and thus represents an additional and even unnecessary amount of work, because this piece of tissue will eventually be destroyed.

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OOPY

The invention is based on the object of a method and a device for transporting away the protruding edging threads to create that is less expensive and easier to design. According to the invention the method is thereby characterized in that at least two running transport threads, -preferably three transport threads, the side of the fabric edge are guided, capture the edge weft thread to form a subject as in the weaving process, and that this edge weft thread is cut off after being detected by the transport threads and that then - after cutting - the transport threads together be twisted, in that at least one full turn of the transport threads takes place after each weft insertion.

With this procedure, only two, preferably three, Trausport threads are required around the cut edges Transporting weft threads and finally destroying them. An elaborate weaving process to get these cut edge weft threads holding together in order to be able to transport them away is therefore unnecessary.

The device for carrying out the method is marked by a twisting device arranged in connection with the vertex of the shed formed by the transport threads

According to an exemplary embodiment, the twisting device can consist of a rotating device that grips the transport threads which is arranged at a distance from the vertex.

A preferred embodiment of such a rotating device is made up of one arranged following the vertex of the shed Kohr for the passage of the transport threads together with the edge weft threads, with gilling means provided in the tube in the manner of a thread brake for the transport threads for the purpose of twisting and wherein the tube has means for rotating the tube and wherein a withdrawal device for withdrawing the transpon threads behind the rotating device or the tube is provided.

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In the drawing, the device for performing the method is shown schematically. <

Fig. 1 shows the device y.uv Durclifϋΐιπίημ; the procedure from the side. Fig. 2 is a plan view.

As Fig. 1 shows, the device consists initially of a known shedding device 3, which only is shown schematically. This shedding device guides the transport threads 1 or 2. It can also be inserted a third thread may be provided, which runs next to the transport thread 2, for example. The specialist training then begins in in a known manner, as in the weaving process, in that, for example, the thread 1 upwards and the thread 2 afterwards is moved down. After each shedding, the weft thread 4 is wefted in a manner known per se Edge weft thread, i.e. the protruding part of the weft thread 4, is denoted by 4a.

Following the shed vertex 5, the twisting device designated as a whole by 6 is arranged. This twisting device consists in detail of one at a distance from the technical vertex 5 arranged rotating device 7. In detail, the training is made so that following the vertex 5, a tube 8 is arranged, for example by a Fabric expander - as it is commonly used in weaving machines - is worn.

The weft threads are cut off immediately after they have been grasped of the weft thread through the transport threads, i.e. immediately after the shed vertex 5. Through the pipe 8, they are cut off before entering the pipe Edge weft threads 4a and the transport threads 1, 2 guided. Killing means 10 are provided inside the pipe,

which captured the "transport threads 1, 2 and the edge weft threads 4a so that a twisting process takes place when the pipe_8 is turned, which ultimately ensures that the edge weft threads together result in a cohesive structure with the transport threads, 5. in order to increase the possibility of transporting these weft threads away create. These clamping means can be designed in the manner of a thread brake, in which, for example, the thread around several pins is guided zigzag.

Simultaneously with the turning of the transport threads, c also takes place Pulling off the transport threads by a known pull-off device (not shown) arranged behind the tube thus the removal of the cut edge weft threads to the waste point.

The rotation of the tube 8 takes place in such a way that after each Weft impact takes place at least one full turn. However, a multiple rotation can also be made if it is desirable that the twisting process is multiplied. The rotation of the tube 8 can with the help of a motor and a Transmission take place as it is known per se. Likewise, the removal of the transport threads can be done with means that per se are known.

The knife for cutting the weft threads is arranged in the area of the shed vertex; it can also be immediately on Tube 8 should be attached at 11 so that a cut is made with each tube revolution.

- Expectations -

Claims (3)

Method and device for transporting away the protruding 5 edge weft threads from fabrics produced on shuttleless looms. Claims 1. Process for removing the protruding edge weft threads from fabrics produced on shuttleless weaving machines, 10 characterized in that at least two running transport threads, which are guided to the side of the fabric edge, the edge weft thread to form one Capture subject as in the weaving process and that the edge weft thread is cut off after being detected by the transport threads 15 and that the transport threads are then twisted together, in that a full turn of the transport threads takes place after each weft insertion. 2. Device for performing the method according to claim 1, characterized by 20 a following the technical vertex (5) of the through the Transport threads formed compartment arranged twisting device (6). - II - BATH ORIGINAL 3. Device according to claim 2, characterized in that the twisting device (6) from a rotating device (7) which grips the transport threads (1,2) with the edge weft thread (4a) consists, which is arranged at a distance from the vertex (5). 4; Device according to claim 3, characterized by the fact that following the vertex (5) of the shed, a tube (8) for the passage of the transport threads (1, 2) with the edge weft threads (4a) is arranged, wherein in the tube (8) gill means (10) for the transport threads (1, 2) are provided for the purpose of twisting and that the tube (8) is provided with means for turning is and that behind the rotating device or the pipe (8 ^ a pull-off device for the transport threads (1, 2) is attached.