JPH11152654A - Generation of pure kind of weft waste from selvage of woven fabric and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To first make obtainable a pure kind of weft waste from the selvage of a woven fabric in a process for producing the woven fabric and make usable again 100% of the obtained weft waste, and to secondly make omissible a conventional darning yarn-winding process for delivering darning yarns. SOLUTION: This method for generating a pure kind of weft waste from the selvage of a woven fabric comprises loosening all the overcast stitches 1a of the selvage 1 comprising weft ends 3a and darning threads 4, after the selvage 1 is separated from the woven fabric 1, collecting the released weft ends 3a in response to the kind of the weft ends, and guiding the released darning threads 4 to again form a selvage 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating / overlocking machine which generates a pure varieties of weft yarn when producing a woven fabric on a loom, and which guides the overhanging yarn of the rotating / overlocking machine. The invention relates to a method and an apparatus for selectively reusing warp yarn material from a gripper edge manufactured in which the direction of rotation can be reversed.

[0002]

2. Description of the Related Art European Patent Application Publication No. 012771.
In U.S. Pat. No. 9, there is known a device for discharging an auxiliary edge, sometimes called a fabric edge or a grip edge, which is separated from a fabric produced on a loom. This device, located near the product take-off roller of the loom, has an auxiliary edge and take-off passage equipped with an injector nozzle. The auxiliary edge consisting of warp and weft yarn is pneumatically guided by this device to a waste container, in which case the warp and weft yarns have not been sorted to obtain pure varieties of waste since the loom.

Further, European Patent Application Publication No. 06810
In the specification of U.S. Pat. No. 44,44, a method for discharging waste edges and a discharge device for carrying out the method are known. In that case, the waste edge formed during weaving on the loom is guided to the waste container by passing between two drive pull-out rollers forming a fastening point for this waste edge. In other words, the waste edge consisting of the warp and the weft yarns is used here in a waste container by mechanical means, without having to carry out a separation process to obtain pure varieties of weft material waste and pure varieties of warp waste after the loom. Be guided.

Further, German Utility Model Registration No. 29708
No. 758 discloses a loom in which the edges of the fabric to be produced and the gripping edges are realized by means of a so-called rotary / overlocker. Here, in contrast to the prior art described above, the weft yarn for forming the gripping edge is tied with only two stitches by means of a rotating / overlocking machine to form a gripping edge or a discarding edge. This document does not disclose the reprocessing or recycling of the gripping edges separated from the fabric edge.

[0005] In any case, since the structure of a twisted yarn such as cashmere yarn, which has a low tensile strength, is too weak to be used as a warp yarn, a pure varieties of weft yarn can be used with this rotating / edge-over machine. No waste is obtained. The loom breaks, resulting in the loom stopping.

In order to eliminate this problem (inadequacy),
At present, cotton yarns of a quality capable of withstanding the load of a rotating / overlocking machine are used as overhanging yarns. However, such cotton strands do not, in some circumstances, contribute to the pure quality of the gripper. Such waste is therefore of little value and is not suitable for reuse in spinning.

[0007]

The problem to be solved by the present invention is as follows.
A method and an apparatus for eliminating a conventional overlock yarn in which a pure varieties of weft waste can be obtained from a gripping edge in a weaving process and can be recycled 100%, and secondly, an overlock yarn is unwound. is there.

[0008]

According to the invention, this object is achieved by the measures according to claims 1 and 8.

According to the invention, after separating the gripper edge from the fabric, the gripper overlock yarn is guided to a rotating body, which is synchronized at least with regard to its control with the drive of the rotary and edgerer. This results in a twisting or unraveling of the all overknot. Only by the synchronous operation or the asynchronous operation of the rotating body and the rotating / overlocking machine that twist back the gripping edge, the entire overlocking of the gripping edge manufactured by the rotating / overlocking machine is loosened and tightly tied into this. The weft ends can be released from the knot, and the weft ends can thus be collected as pure varieties in front of a rotating body that twists back. This pure variety of weft waste is reused in spinning by further processing. The same is true for synthetic wefts or synthetic warps that are made into a pure breed matrix by melting.

[0010] Depending on the use of weft and warp materials, considerable cost savings are achieved per loom and per year. Furthermore, this eliminates the need for expensive disposal of the waste, which contributes significantly to the environment.

[0011] By operating the unraveling device synchronously or asynchronously with the spinning and overdrawing machine, for example, by binding the overlaid yarns of synthetic material to one another in the form of endless yarns, the overlying weft yarns A so-called circulation circuit can be formed. As a result, it is possible to omit the overwinding of the gripping edge.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in the drawings.

The figure shows a device on the left side of a woven fabric 2 for generating pure varieties of weft waste from the fabric gripper edge 1 on a loom. Here, the loom itself is not shown, and only a part of the woven fabric 2 composed of the weft yarn 3 and the warp yarn 12 woven on the loom is shown.

As is known, in order to produce a visually reliable solid fabric edge on a high-speed rotary loom and to form a so-called gripping edge 1, it is known, in particular, from German Utility Model Registration No. 29708758. A rotating / overlocking machine 5 is used.

The method according to the invention does not use a knitting thread from a knitting thread, as is known, to form the gripping edge 1, and the rotating and knitting machine 5 uses a first and a second endless knitting thread. 4, the free end 3a of the weft thread 3 is fully tied by the overlock knot 1a, and the gripping edge 1 is
After being separated from the woven fabric 2 by the fabric 4, the loosening device 6 loosens the entire knot 1 a, and the free weft 3
Is received by a discharge device 8 comprising a suction pipe 8a and at least one collecting container 8b.

In the embodiment of the present invention, in particular, an operation step, that is, a step of forming the entire overhang knot 1a of the gripping edge, a step of separating the gripping edge 1 from the woven fabric 2 by the cutter 14, and a loosening device 6 of the entire overlock knot 1a. The steps are performed by being electrically controlled by the execution control device 9.

The unraveling step of the entire overlock knot 1a is performed synchronously or asynchronously with the production by the rotating / overlocking machine 5. In this case, it is important that the rotation speeds of the rotating bodies 5a and 6a are the same in the asynchronous operation mode and the rotation direction reverse operation mode. This ensures that the entire overlock knot 1a is always loosened at the suction site of the discharge device 8.

That is, when the formation of the entire overlock knot 1a is performed, for example, by repeatedly reversing the rotating direction of the rotating body 5a of the rotating / edge overlocking machine 5 capable of reversing the rotating direction,
The unraveling process of the entire overhang knot 1a is inevitably performed by the unraveling device 6
This must be done by controlling the direction of rotation of the rotating body 6a and reversing it. The control command is sent to the execution controller 9
To the rotating / bending machine 5 or the unraveling device 6 via the wirings 15 and 16.

In another embodiment according to the invention, the collection of pure varieties of weft waste is also involved in the execution control 9, in particular the collection of pure varieties of weft ends is controlled by a weaving machine in a loom control, not shown here. It is adapted to be performed in connection with a process based weft selection program.

The device according to the invention for carrying out the method comprises a rotary body 5 of a rotary and overlocking machine 5 known per se for forming a gripping edge 1 having a full overlock 1a.
a is controlled via the control wiring 15. The rotating direction of the rotating body 5a can be reversed.

Furthermore, the device according to the invention has a device 6 for unraveling the entire overlock knot 1a on a straight extension of the gripping edge 1, the drive 6b of the unraveling device 6 being adapted to unravel the entire overlock knot 1a. It is controlled by the execution control device 9 via the control wiring 16.

The loosening device 6 has a rotatably driven rotating body 6a having an eye for guiding the overhanging thread 4 therethrough.

In this embodiment, the rotating body 6a is connected to an electric drive 6b via a flexible shaft 6c. A cutter 14 is provided between the rotating / binder 5 and the loosening device 6.
Behind the gripper edge 1 separated from the fabric 2 by the weft end 3a, a discharge device 8 of the weft end 3a is provided, after which the catching means 8a in the form of a suction tube has completely unwound the knot 1a.
a is arranged to be sucked and transported to at least one collecting container formed as collecting means 8b.

After passing through the yarn guide 7 provided after the unraveling device 6, the overlying yarn 4 reaches the overlying yarn pulling-out device 10 composed of the rotary drive roller 10a and the pressing roller 10b. The overlying yarn 4 is then properly turned and guided.
1 and subsequently returned as a separate endless knitting thread, optionally via a tension beam 17, through a thread monitor 13 to a spinning and edging machine 5.

Only with the technical teachings according to the invention can the tightly tied weft be released in the entire overlock of the gripper edge and, after having been loosened, collected as pure varieties of weft waste. it can. By using so-called endless overlock yarns as overlock yarns,
A separate overwinding pin as a overrunning feeder is omitted.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an apparatus according to the present invention for generating pure varieties of weft lint when utilizing endless warp yarns.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grab edge 1a All over knots 2 Fabric 3 Weft 3a Weft end 4 Overlock 5 Rotation / edge overroller 5a Rotating body 6 Loosening device 6a Rotating body 6b Drive 6c Shaft 7 Overlock guide 8 Ejecting device 8a Suction pipe Reference Signs List 9 execution (loom) control device 10 pull-out device 10a roller 10b roller 11 turning means 12 warp yarn 13 yarn monitor 14 cutter 15 control wiring 16 control wiring 17 tension beam

Claims (17)

[Claims] A fabric gripping edge formed during the manufacture of a fabric on a loom comprises the ends of a weft thread tied to the fabric and two overhang threads which guide and rotate them. A method of forming a full-over knot using a rotating / edge-over machine with a rotating body capable of reversing the direction, the gripping edge is separated from the fabric after its formation, and a pure variety of weft litter is generated from the gripping edge. In, the entire overlock is loosened after the gripping edge is separated from the woven fabric, and then the weft ends are released after unraveling the entire overlocking, and the overlock made of a material of inseparable nature forms the gripping edge again A method of generating pure varieties of weft litter from a fabric gripping edge, characterized in that it is directed to: 2. The method according to claim 1, wherein the step of unraveling the entire knot is performed synchronously with its production. 3. The method according to claim 1, wherein the step of unraveling the entire knot is performed asynchronously with its manufacture. 4. The weft end is sorted according to the type of material.
2. The method according to claim 1, wherein the waste gas is discharged to a separate collecting means.
The described method. 5. The method according to claim 1, wherein an endless yarn is used as the overlying yarn. 6. The method according to claim 5, wherein the endless yarn is made of a weldable material. 7. The method according to claim 1, wherein the weft ends are discharged or gathered in connection with a weft selection program on which the weaving process is based. . 8. An execution control device (9) for guiding a knitting thread (4) for forming a full overlock knot (1a) at a gripping edge (1) and for rotating the rotating body (5).
a rotary / overlocker (5) having a), a gripper edge (1)
Knot (1a) arranged on a linear extension of
Device (6) for unraveling, a discharge device (8) for the weft end (3a) arranged between this loosening device (6) and the gripper edge (1), which is arranged after the loosening device (6) The device according to claim 1, characterized in that it comprises a device (10) for removing the overlock thread (4) and a plurality of guide means (11) for returning the overfill thread (4) to the rotating and overlocking machine (5) in the form of a circulation circuit. Item 1
An apparatus for performing the described method. 9. An apparatus (6) for unraveling an entire overlock knot (1a) is a rotating body (6a) which guides the overhang thread (4) and is driven to rotate so that its rotation direction can be reversed. An apparatus according to claim 8. 10. A rotation driving device (6b) for a rotating body (6a).
10. The device according to claim 9, wherein is a separate electric drive. 11. The device according to claim 9, wherein the rotating body is a rotor of an electrically controllable electric motor. 12. A weft end (3a) comprising at least one means (8a) for catching a weft end (3a).
9. Device according to claim 8, comprising at least one means (8b) for collecting a). 13. The device according to claim 8, wherein each of the various materials of the weft ends (3a) is provided with a collecting means (8b). 14. The device according to claim 8, wherein the overdrawing device (10) for the overlock yarn (4) comprises a roller set (10a, 10b) with at least one rotary drive roller (10a). apparatus. 15. The rotary drive roller (10a) is a weaving machine pull-in roller and the non-rotary drive roller (10b) is a pressing roller acting on the fabric pull-in roller. apparatus. 16. Means (1) for turning and returning the overhang thread (4).
9. The device according to claim 8, wherein 1) is a rotatably supported turning roller. 17. The device according to claim 8, wherein each of the overlying yarns (4) is guided via a separate deflecting roller before being introduced into the rotary and overhanging machine (5).