DE1585536C3 - Warp knitting machine for lace manufacture - Google Patents

Description

The invention relates to a warp knitting machine for lace manufacture, in which a plurality of weft thread guide rails are fixedly arranged in the direction of oscillation in front of the knitting needles, and in which both the loop-forming threads and the weft threads deflect, between the knitting needles and the weft thread guide rails, swing through Yarn guide with a tip provided at the end of its sloping edge hard on the ^; 0nieikäH &
rail past ^ ifen ^ _; . ■ * [·.; - Jf ^ wT .- / ;;

In a known machine of this type, the distance between the lower edges of the Schüßiadenlegescliien from the Fräsblecnöb ^ rkaÄte 'is only slightly greater than " the distance between the needle heads from the; Milling plate upper edge in the upper position of the needles. Because the" 60 Weft threads have to run at a relatively acute angle towards the beginning of the goods located on the upper edge of the milling sheet, only relatively few weft thread guide rails can be arranged in the known machine. This in turn has the consequence that it is only possible with the known machine to produce points with a simple pattern, that is to say points with only slightly variable motifs of small dimensions on a uniform network base. The extent of the offset, at which the weft threads guided by the guide rails can still be properly deflected from the tip of the thread guides, is extremely small because of the small distance between the lower edge of the guide rail and the Fräsbiechbberkänte ■■: '!

The task that the. The present invention is based on the aforementioned To avoid disadvantages and to create a warp knitting machine that makes it possible to produce lace with rich Pattern to produce and at the same time to ensure that the stitch-forming threads in the Tip manufacture are not subject to significant wear and tear.

This object is achieved according to the invention in that the distance between the lower edge of the weft thread guide rails and the upper edge of the milling sheet is a multiple, ie at least twice the distance between the needle head and the upper edge of the milling sheet when the needles are in the upright position, and that the thread guide eyelets are about 'the inclined edge parallel slots are formed. - ' _/ .

The greater distance between the lower edge of the weft thread guide and the upper edge of the milling sheet enables a larger number of guide rails. without the angle enclosing the weft sheets needing to be increased. Furthermore, a greater offset of the laying rails guiding the weft threads is possible, in which case the weft threads are properly deflected from the tips on the thread guides. Because the thread guide eyelets are designed as slots, the deflection of the loop-forming thread is limited to a minimum with this arrangement of the guide rails, despite the large oscillation amplitude of the thread guides leading the _{thread-forming threads, given the relatively large distance between the weft thread guide rails and the "L required with the same inlet angle ratios} so that no significant wear of the loop-forming threads can occur.

It should also be pointed out that thread guide eyelets are already known in a warp knitting machine than approximately parallel to the thread guide edge to form running slots. However, the known machine is a thread guide that in a relatively large and from one weft thread to the other different distance from the Swing the weft thread guide rails through the weft thread sheet. The thread guides with the slit-shaped Eyes do not contribute to the pattern possibilities that can be achieved with the known machine ! to multiply. iWith this * machine it is not possible make a usable tip.

Preferred further developments of the invention result in ^ from the subordinate claims.

Two exemplary embodiments of the invention are explained below with reference to the drawing. In this show: ''..; / ^ m · ί ^! ; ί.ιΓ -, - V -'.- · ■ ■■■ '..'

1 shows a section through the loop formation point a first embodiment of a warp knitting machine according to the invention, ■

F i g. 2 shows a section through the loop formation point of a second exemplary embodiment of a warp knitting machine according to the invention,

3 shows a view of the loop formation point according to FIG. 2 from behind and

3 4

4 shows the same section as FIG. 2 in which when the thread guides 4 are so far in front of the needles 2 phase of the consideration of the loop-forming threads that the pointed end 6 of the front

the. edge 5 of the thread guide 4 in front of the weft thread

The invention shown in FIG. 1 shown is located.

Ten knitting machine has as weft guide rails 5 To reduce the friction on the thread F, a set of juxtaposed straight lines is advantageously enlarged on the transverse side of the steel strips, which in the following as rods 1 are thread guide eyelets 7 in their central area. Are drawn, each of which has a row of eyelets 3 due to the drive, the speed of the thread guide through which a weft thread 4 never passes over the length of its working stroke AC , which leads to the beginning of the goods, and that of io is constant.

a jacquard mechanism (not shown). Taking this variable into account. Before the thread sheets, which run between the linear speed of the thread guide 4 during the bars 1 and the beginning of the goods, the working stroke AC can work the thread a row of plate-like thread guides 4 are arranged, guide 4 compared to known thread guides with which during a laying simultaneously in the weft 15 rectilinear leading edges thereby improved werf adenscharen, first at the level of the rods 1, that this leading edge S is given a variable with the pointed end 6 of the leading edge 5 and curvature, the slope of which is then directly related to this whole, oblique to the threads / the Proximity of the pointed end 6 is initially small in order to penetrate the weft thread sheets running edge 5 to improve the selectivity of this end 6, so that the intersection of the threads / of the rods 20 the inclination of the leading edge 5 then increases rapidly, from 1 to added to the needles 2, so to speak, and then again over the greater part, up to the men. Base of the thread guide 4 to decrease progressively.

Across each yarn guide 4, after the pre This curved shape of the front edge 5 of the derkante 5, performs an eyelet 7, in which a knitted yarn guide 4 protects the threads f characterized in that the thread F is threaded, which of the thread guide 4 25 speed of the combing of the thread tangled through the weft thread sheets over the tongues away from the rods 1 towards the needles 2, crossed threads / is pressed, and at the end, despite the variable linear speed of the thread, the forward movement of the thread guide 4 over the guide 4 is balanced and the increasing thread knitting needle 2 is placed and tension can be adjusted in the loop formation,
the crossed weft threads / binds. 30 The upper curve of the leading edge 5 reversed

To now the variety and the dimensions of the curvature can also be omitted. In this case

To enable the lace motifs to be produced, the front edge 5 is then continuous

a large number of rods 1 are provided. Since the curvature, the slope of which depends on its pointed

from the front and rear Schußfadenschar th end 6 to their other end progressively

included angles cannot be arbitrarily enlarged.

which can, the large number of rods 1 requires instead of the trajectory of the thread guide 4 as

relatively large distance between milling sheet metal in the embodiment shown in FIG

Top edge and bottom edge of the bar. The front edge 5 perpendicular to the path of movement of the knitting needles 2

must accordingly also be relatively long to let run, it is, as in the following still

from which the large required working stroke AC 40 will be clarified, more expedient if the loading

the thread guide 4 results. trajectory of the thread guide 4 α perpendicular to the

Because of the large working stroke AC , one would run in the center plane of the rods 1 α , as shown in FIG

usually as a round hole T, which is in the part F i g. 2 and 4 is shown.

the thread guide 4 is arranged, which in the comparison of FIG from the lower edges of the rods 1 or la thread F cause. Such a deflection would increase the level formed by the upper edge of the milling sheet and wear on the eyelet 7 and cause large, identical working stroke of the thread guide 4 or Aa vibrations of the thread tensioning rocker. a larger number of rods 1 α can be arranged

To overcome this disadvantage, one uses 50 den can.

only a small part BA of the entire work- The ability of a knitting machine to be as large as possible

hubes AC, which the thread guide 4 produce in the lace during each motif, depends on both

Working cycle executes to the mesh threads F of the number of rods 1 and 1 α from which on the

from their common plane, in which they can be arranged by the knitting machine, as well

Thread tensioning rocker between their support points 8 to 55 of the largest possible offsets of the weft

the same and the beginning of the goods held taut threads / or / α from. The amount of offset c is

are to squeeze out and through the between not arbitrary because how F i g. 3 shows between the

the beginning of the goods and the bars 1 tensioned deflection point of the weft thread / α in the eyelet 3 α of the

To push weft threads. Rod 1 α on the one hand and the tip 6 α of the thread

To this end, the lug 7, which is a distance in the 60 leader Aa other hand, yarn guide 4 due behind its front edge 5 for which the way that the thread of the stitch yarn F is provided so at to large Ver passage, a set C no longer deflected by the tip 6 α , given a longitudinal shape, so that this eyelet 7 is impaled by it, pushed away along this front edge 5, against the essentials of the offset direction, or not gripped at all, towards the pointed tip protruding from the thread guide 4. 65 turns. As a result of the large distance h between the lowing end 6 of this edge 5 extends. The eyelet 7 is the lower edge of the bar and the upper edge of the milling sheet metal is dimensioned so that the mesh threads F are straight from the offset c relatively large, in which the front thread tensioning rocker run to the beginning of the goods, said errors do not occur.

1 sheet of drawings

Claims (4)

Claims:. 1. Warp knitting machine for lace manufacture, in which a plurality of weft thread guide rails are fixedly arranged in the direction of oscillation in front of the knitting needles and in which the thread feeders which both guide the stitch-forming threads and deflect the weft threads, between "the knitting needles and jdenVSchußfa ^ enlegeschienen" swinging thread a point provided on the pride J of its inclined edge ^; strip the lower edges of the weft thread guide rails past, characterized in that the distance between the lower edge of the weft thread guide rails and the upper edge of the milling sheet is a multiple of the distance between the needle head and the upper edge of the milling sheet when the knitting needles are in the upper position (2nd ) and that the thread guide eyelets (7) are designed as slots running approximately parallel to the inclined edge (5). 2. warp knitting machine according to claim 1, characterized in that the slots in their middle area are wider than at their end, as 3. Warp knitting machine according to claim 1, characterized in that the inclined Edge (5) is curved such that the slope of this curvature with respect to the direction in of the threads (/, / α) of the central weft sets run at the beginning of the goods, initially relatively little. and in the further course decreases progressively up to the end facing away from the tip (6, 6 a). 4. Warp knitting machine according to one of the preceding claims, characterized in that that the movement path of the thread guides (4 α) for the loop-forming threads (F α) is perpendicular runs to the central plane of the weft thread guide rails.