CS202431B1 - Knitting mechanisms for knit-weaving machines - Google Patents

Description

(54) Knitting mechanism of knitting machine

It is an object of the present invention to improve the knitting mechanism of a knitting machine, formed by a transversely arranged system of laying members in which weft yarns unwound from a stationary weft supply are placed outside the shed, whose arms are reciprocally pivotable in the open shed; moving reed knitting needles arranged across the formed fabric to catch the laid weft yarns and form stitch pillars.

The known knitting machine is provided with a shed-forming mechanism

A warp yarn and a warp-knitting knitting mechanism, having stitch columns disposed between groups of warp yarns that interweave in a weaving weave with warp stitch bonding loops.

The knitting mechanism consists of a plurality of reed knitting needles arranged in a row across the fabric to be formed and moving in a direction substantially parallel to the warp yarns between the throwing and laying position in the open shed and back, and a plurality of guide members with guide eyelets the weft yarns unwound from the pattern are rotatably supported in a transverse bed parallel to the knitting needle system. The bed of the laying members is either fixed to the perch or is stationary.

In the open shed, the laying members simultaneously insert the weft loops in the form of a hairpin of the weft threads which are caught by the knitting needles in the extreme laying positions.

202 431

202 431 and tied into the stitch pillars.

By sliding the eyelet from the tongue to the stitch of the knitting needle, especially when the warp knitting ties are high, the tongue bounces and unwanted closure of the knitting needle hook prevents the weft yarn from loading into the knitting needle hook, thereby creating warp binding errors.

Correct function of the tongues is especially necessary when creating knitted warp open cloth according to MS. No. 153,246. In this weave, the weft thread is placed under the knitting needle by the roller and is not inserted into the needle hook until the roller is retracted.

In warp knitting machines, the self-closing of the needles of the knitting needles is prevented by various securing means to force the tabs to open or prevent them from closing at a certain stage of the movement of the knitting needle, for example by a transversely secured securing wire.

However, these means are not applicable to a weaving machine for the production of knitted fabrics, since the knitting operation takes place between the warp threads in the open shed and during the beam movement.

The purpose of the invention is to propose a simple, operationally reliable and space-saving securing means for forming a perfect knitting warp-weave, in particular a cloth-weave on a knitting machine.

Essentially, the knitting mechanism of the knitting machine produces such a condition that above each knitting needle a band is attached to the needle bed, resiliently flexible to contact the tongue of the knitting needle as it moves between the two extreme positions.

Preferably, the strips are formed as teeth of a ridge attached to the needle bed. The length of the strap is chosen such that the tongue at the ejection position (by the needle flight lengthwise extends beyond the end of the strap).

The strip is made of a suitable resilient, resilient material, in particular a rigid plastic film, such as a neural film.

The placement of the tape relative to the hook of the knitting needle must ensure that a new weft loop is inserted into the hook, but at the same time it must not impede the movement of the tongue.

Another, not negligible advantage of the solution is that the strip effectively protects the knitting needles from dust.

An exemplary embodiment of the invention is shown schematically in the accompanying drawing, in which: FIG. 1 is a side view of a needle bed with a ridge at the laying position of knitting needles, FIG. 2 is a side view of a needle bed with a ridge at the throwing position of knitting needles; FIG. 3 is a partial top plan view of the needle bed of FIG. 2;

On the needle bed 1 of the knitting needles 2 with the tongues 2 a crest 4 of flexible plastic foil, of suitable plastic, is fastened with a clamping bar 4 and screws 2, whose teeth, in the form of strips 2, are located above the knitting needles 2, in the tongue path 2 ( 1, 2). The length of the strips 20 is selected such that the tongue 2 is at the ejection position of the knitting needles (FIG. 2). extends over the end

In practice, the end of the band 2 is located about halfway between the end of the hook 8 of the knitting needle 2 and the axis of rotation 2 of the tongue 2 at the ejection position of the knitting needle 2.

During the working movement of the knitting needles 2, the flexible bands 2 allow the movement of the tongues 2 between the laying and the throwing position of the knitting needles 2 (Figs. 1, 2), but simultaneously limit the individual extreme positions of the tongues 2 so that the weft loops needles 2.

The use of a film of suitable parameters ensures reliable operation of the ridge with sufficient service life.

Claims (4)

SUBJECT OF THE INVENTION Knitting mechanism of a knitting machine, formed by a transversely arranged system of laying members in which weft yarns unwound from a stationary weft stock are placed outside the shed, the arms of which are reciprocally pivotable in an open shed, and from a set of reciprocating reed knitting needles arranged transversely to form the weft yarns and stitch pillars, characterized in that a strip (7), attached to the needle bed (1), resiliently flexible to engage the reed (3) is positioned above each knitting needle. knitting needles ¢ 2) when moving between the two extreme positions. Device according to claim 1, characterized in that the strips (7) are designed as teeth of a ridge (6) attached to the needle bed (1). Device according to claim 1, characterized in that the tongue (3) extends longitudinally beyond the end of the band (7) in the ejection position of the knitting needle (2). Device according to claim 1, characterized in that the strip (7) is made of a rigid plastic film.