EP1589134A1 - Method of making knit fabric including weft inserted yarn - Google Patents

Abstract

To knit a fabric with a laid weft, on a flatbed knitter, the selected needles (3) are extended to take the weft (5) in their hooks (31). When the weft has been laid in the hooks, the needles are retracted to bring the weft to a neighboring knitting edge. The stitch is formed with a knitting yarn, with the adjacent needle (3') moving over laid weft. The needle to knit the stitch is lifted over the base surface (11) sufficiently for its under side (32) to move over the laid weft. The weft can be laid in empty needles, or needles carrying stitches.

Description

The elastic properties of knitted fabrics can be determined by the insert of Weft threads are specifically influenced. While knits normally have a high transverse elasticity, can by the Weft insert Knitted fabric with at least lower areas Transverse strain are produced. This is used, for example, in medical Knitted like bandages, compression stockings and the like exploited.

In all previously known methods for producing crocheted with Weft insert becomes the weft thread on the courses of the knitted fabric hung up. For double-sided knitted fabric this is without additional effort easily possible. In contrast, single-layered knitwear must be in front of everyone Weft insert selected stitches on needles of the opposite Needle bed are umgehängt, so that support positions for the Weft result. The looped stitches will be back afterwards hung back and thus bind the weft yarn to the fabric. In particular, with single-surface knitted fabrics is thus the insertion of Weft threads a relatively time-consuming process.

In addition, the weft insert special weft guide needed, which the weft leading to the center of the knitting on the Put on a course. Standard thread guides put the knitting thread against it trailing the center of the knitting loop into the needle hooks. The Movement initiation thus takes place with one weft yarn guide on another Place as with a standard thread guide. The weft insertion makes Therefore, in the methods of the prior art, a special Equipment of the flat knitting machine with such special thread guides required.

The present invention has for its object to provide a method for To propose production of a knitted fabric with weft insertion, in which the weft insertion even with einflächigen crocheted without large additional time can be spent.

a) Austreiben von Nadeln, in deren Haken ein Schussfaden eingelegt werden soll,

b) Einlage des Schussfadens in die Haken der ausgetriebenen Nadeln,

c) Rückzug der Nadeln, bis der sich in den Nadelhaken befindende Schussfaden an zur betreffenden Nadel benachbarten Maschenbilderkanten anliegt,

d) Bildung von Maschen für das Gestrick mit mindestens einem Strickfaden, wobei die zu den Nadeln mit eingelegtem Schussfaden benachbarten Nadeln über den Schussfaden hinweg bewegt werden.

The object is achieved with a method for producing a knitted fabric with weft insert on a flat knitting machine, which is characterized by the steps:

a) driving out of needles, in the hook of a weft thread to be inserted,

b) inserting the weft thread into the hooks of the driven-out needles,

c) withdrawal of the needles until the weft thread in the needle hook is in contact with the stitch pattern edges adjacent to the respective needle,

d) forming stitches for the fabric with at least one knitting yarn, the needles adjacent to the needles with inserted weft being moved across the weft yarn.

In contrast to the known method of weft insertion is method of the invention, the weft not on the course, but inserted into the hooks of individual, selected needles. The fixation The weft thread is made with each needle, in the hook he is inserted, and with the adjacent mesh picture edges. The number of fixations over the width of the knit can be according to the knitting technical Requirements of the fabric to be produced are selected.

The insert of the weft thread can both empty needles and in Mesh-bearing needles are made. An empty needle, a weft In addition, a stitch from the opposite Pick up the needle bed. The selection of the fixing positions of the weft This makes the knitting width very flexible. It can also be from Knitting row to knitting row again and again other needles for insertion of the Weft can be used.

The inventive method has the advantage that neither single-surface still with double-sided crocheting a transfer of stitches in front of the Weft insertion is required. The weft insert is therefore a Process that takes little knitting time.

To move adjacent to the needles with pickled weft Needles over the weft thread have different possibilities. So The neighboring needles can over the needle bottom at least as far be raised so that the needle bottoms slide over the weft thread can. This lifting to the needles with pickled weft adjacent needles over the needle bottom, for example, by a Knitting lock the flat knitting machine or via switchable cam or Casseroles take place at the base of the needle. But also a lifting of the needles only through the fixed weft is possible.

Instead of lifting the needles or in addition to this measure can Also, the weft should be pushed down so that the to the needles with inserted weft thread adjacent needles with their needle bottoms slide over the weft thread and thus can easily form stitches. For pressing down the weft thread, for example Hold-down boards are used. But also by the application appropriate knitting techniques for the production of the knitted fabric can Weft yarn pushed down so far that the movement of the too the needles with inserted weft thread adjacent needles through the Weft is not obstructed.

Another advantage of the method according to the invention is that the Weft insertion are performed by means of a standard thread guide can. The insert of the weft thread takes place at the same point, that is trailing to the center of the knitting, as with the yarn guides with or the knitting threads.

Hereinafter, based on the drawing, possible variants of inventive method compared to the method of the prior art the technique described in more detail.

Fig. 1

eine schematische Darstellung eines Strickschlosses mit einem Schussfadenführer zur Durchführung eines Verfahrens zur Schussfadeneinlage nach dem Stand der Technik;

Fig. 2

eine schematische Darstellung eines Querschnitts durch ein Nadelbett einer Flachstrickmaschine mit einer Nadel mit eingelegtem Schussfaden;

Fig. 3

eine der Fig. 2 entsprechende Darstellung mit einer Nadel mit eingelegtem Schussfaden und einer Masche;

Fig. 4

eine der Fig. 2 entsprechende Darstellung mit einer Nadel mit eingelegtem Schussfaden und anschließend übernommener Masche vom gegenüberliegenden Nadelbett;

Fig. 5

eine der Fig. 2 entsprechende Darstellung mit einer Nadel mit eingelegtem Schussfaden und einer zweiten, über den Schussfaden bewegten Nadel.

Show it:

Fig. 1

a schematic representation of a knitting castle with a weft yarn guide for performing a method of weft insertion according to the prior art;

Fig. 2

a schematic representation of a cross section through a needle bed of a flat knitting machine with a needle with pickled weft thread;

Fig. 3

a representation corresponding to Figure 2 with a needle with pickled weft thread and a stitch;

Fig. 4

a representation corresponding to Figure 2 with a needle with pickled weft thread and then taken over stitch from the opposite needle bed.

Fig. 5

one of the Fig. 2 corresponding representation with a needle with pickled weft and a second, moving over the weft needle.

The knitting cam illustration of Fig. 1 illustrates the weft insertion at the method of the prior art for the production of crocheted with Weft insert on a flat knitting machine. The knitting lock 10 moves in the direction of arrow X. With the line S-M is the center of the knitting characterized. It is a weft yarn guide SFF and a standard yarn guide NFF provided. The weft guide SFF places the weft in one Distance V leading to the center of the knitting cam SM on the not shown here Wale. The emergence of needles 30 is just beginning at this position through the knitting cam 10. The inserted in this position weft is from the underside of the knitting needles made in expulsion movement covered and therefore can not be detected by a needle hook.

By contrast, with the normal yarn guide NFF, it is delayed at a distance N for knitting lock center SM a knitting thread inserted into the needle hook. These Position of the normal thread guide NFF corresponds to the position of the Schussfadenführers in carrying out an inventive Process.

Fig. 2 now illustrates the insertion of a weft thread 5 in the hook 31 a Needle 3. The needle 3 is in the needle bed 1 in the direction of arrow Y outward and inwardly movable. Fig. 2 shows the position of the needle 3 after the insertion of the Weft 5 and withdrawal of the needle 3, until the weft 5 at a Mesh image edge 21 of a mesh 3 adjacent to the mesh 3 is applied. In this position, the weft 5 is fixed exactly.

While Fig. 2 shows a stitchless needle 3, it is shown in Fig. 3 that the needle 3 before the insertion of the weft thread 5 in their needle hook 31 also already can wear a stitch 6 of the knitted fabric. The weft 5 is simply in addition to the mesh 6 inserted in the needle hook 31.

Fig. 4 shows in the same view as Figs. 2 and 3, a needle 3, which after the insert of the weft thread 5 still a stitch 6 'from the opposite Needle bed has taken over. The weft 5 is here behind the Mesh 6 ', whereby the weft 5 on the outside of the knitted fabric is tied as soon as the stitch 6 'is knitted. In contrast to In Fig. 3, the weft thread is tied to the fabric inside, as soon as the stitch 6 is knitted, since here the weft 5 in front of the stitch 6 lies.

Fig. 5 illustrates in the view of FIG. 2 that a needle 3 ', the adjacent to the needle 3 with the in its needle hook 31 inserted Weft 5 is arranged, from the needle base 11 of the needle bed 1 lifts, to be able to slide with her needle bottom 32 on the weft thread 5. This lifting of the needle 3 ', for example, by the knitting lock 10th or via switchable cams or casseroles on needle base 11. The Lifting movement of the needle can also without a targeted control The needle take place in that her rounded needle hook 31 'fixed on Weft 5 runs.

Another way, the needle 3 'to slide over the weft thread 5 to allow, is the weft 5 side of the needle 3 down to press. For example, hold-down boards can be used become. Also by applying appropriate knitting techniques is a such depression of the weft 5 possible.

Claims (9)

Process for the production of a weft insert with a weft insert on a flat knitting machine, characterized by the steps: a) expelling needles (3), in the hook (31) a weft thread (5) is to be inserted, b) inserting the weft thread (5) into the hooks (31) of the expelled needles (3), c) retraction of the needles (3) until the weft thread (5) located in the needle hook (31) bears against one of the stitch pattern edges (21) adjacent to the respective needle (3), d) forming stitches for the knitted fabric with at least one knitting thread, wherein the needles (3 ') adjacent to the needles (3) with inserted weft thread (5) are moved over the weft thread (5). Method according to claim 1, characterized in that the needles (3 ') adjacent to the needles (3) with inserted weft thread (5) are raised above the needle base (11) at least so far that the needle undersides (32) are moved over the weft thread (11). 5) can slide. A method according to claim 2, characterized in that the needles (3 ') by a knitting lock (10) of the flat knitting machine or via switchable cams or casseroles on the needle bottom (11) via the needle bottom (11) are raised. A method according to claim 2, characterized in that the needles (3 ') are raised by means of the fixed weft thread (5) over the needle base (11). Method according to one of claims 1 to 4, characterized in that the weft thread (5) is pressed down, so that the needles (3) with inserted weft thread (5) adjacent needles (3 ') with their needle bottoms (32) over can slide the weft thread (5). A method according to claim 5, characterized in that the weft thread (5) is pressed down by hold-down boards. A method according to claim 5, characterized in that the weft thread is pressed down by applying appropriate knitting techniques for the production of the knit fabric. Method according to one of claims 1 to 7, characterized in that the weft insert is carried out by means of a standard thread guide (NFF). Method according to one of claims 1 to 8, characterized in that the weft thread (5) in the hooks (31) of empty and / or mesh-bearing needles (3) is inserted.

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