FR2773824A1 - CHAIN KNITTING MACHINE, PROCESS FOR MANUFACTURING PATTERNED KNITTED ARTICLE AND PATTERNED KNITTED ARTICLE - Google Patents

Abstract

Said loom has needles (8) for inserting drawing threads (7), which can be brought to at least three stable positions. The fundamental shift is such that the maximum possible total shift of said needles (8) takes place at least above four knitting needles (2). In preset pattern regions, the total shift is selectively below one to four knitting needles (2). Thus, a warp knitted article with a pattern of at least three thickness / thinness gradations, or with a two-tone pattern, is obtained.

Description

CHAIN KNITTING MACHINE, MANUFACTURING METHOD

  OF A KNITTED ARTICLE OF PATTERNED CHAIN AND

KNITTED PATTERN CHAIN ARTICLE

  The present invention relates to a trico-

  chain stage including a Jacquard command in which

  movable drawing thread insertion needles are

  tees by a system of insertion bars of the design giving the said needles the same fundamental offset; and a uni-

  that basic bar carrying non-displaced insertion needles

cables.

  The invention further relates to a method of manufacturing

  tion of a patterned knitted article, on the aforementioned loom, process in which drawing threads are displaceable by needles for inserting drawing threads, by means of

  of a Jacquard command, and have the same fundamental shift

  mental; and basic threads are delivered in a single sheet,

  by non-displaceable insertion needles.

  Furthermore, the invention relates to a knitted article

  patterned chain, of a new type.

  According to the book Raz entitled "Warp Knitting Produc-

  tion ", 1987, pages 304 to 308, we know a trico-

  chain tag with Jacquard control, of the type under consideration, in which

  drawing thread insertion needles, which can be removed

  placed with a distribution of knitting needles, are

  tees by a system of insertion bars of the design which gives,

  to said needles, a fundamental offset identical to-

  below two knitting needles, that is to say a race representing two distributions of knitting needles. This results in different overlaps, and therefore differences in density that can be used to create patterns.

  Patent application DE-196 51 053.8-26, not published an-

  Later, exposes a Jacquard-controlled warp knitting loom in which Jacquard-controlled insertion needles can assume three stable positions. To this end, by means of actuators of a needle activation device, the insertion needles can be moved back and forth between two extreme positions, of which

  the spacing is equal to twice the distribution of the needle

  the. Additional stops, provided elsewhere, can

  be brought along the path of the insertion needles by the

  intermediate of operating devices of an activation device

  tion of stops, and therefore maintain said needle-

them in a central position.

  In general, the object of the invention is to provide warp knitted articles of a new type, provided

of patterns.

  According to the invention, this object is achieved thanks to a warp knitting loom characterized by the fact that the

  drawing thread insertion needles can be moved

  created by the Jacquard command at one of at least three positions

  stable positions respectively offset by a spacing between needles; and by the fact that the fundamental offset is chosen in such a way that the maximum possible total offset of said needles for inserting the drawing threads takes place at the

  at least below four knitting needles.

  This type of warp knitting makes it possible to obtain

  nir of warp knitted items which, as will still be

  explained below, have a pattern with at least three scales

  thick / thin, or a two-tone pattern. An im-

  lift is then granted to the large total offset above

  four or more knitting needles, which allows respec-

  the formation of thick ornamental regions, or the enhancement of a color; and the combination of the fundamental offset with insertion needles that can take more than two positions, as this allows precise scaling

  between different densities of the pattern regions or, respectively-

  ment, a transition in finesse from one color to another.

  According to the invention, the shift of the bar

  base is preferably operated below a tri-needle

  quotation. This improvement is reflected in the fact that a uni-

  that base bar inserts fringes that produce

  an article background, associated with the drawing threads; and that a guide

  corresponding dage of said drawing threads makes possible a

  transition between a flat pattern and a cross-linked pattern.

  According to a characteristic of the invention, the needles

  the insertion of the drawing wires can be preferential-

  placed in three positions, and the fundamental shift can take place below two knitting needles. Of the

  so it is possible to create decorative regions present

  both a three-step pattern of thickness / thinness and

floating wires.

  In accordance with the invention, the needles for inserting the drawing threads can be conveniently placed in three positions, and the fundamental offset can take place below

  of three knitting needles. This allows for a deca-

  total yarn over five knitting needles, and

  define a corresponding gradient of the thick / thin pattern.

  When the base bar is preferably placed before the bar system for inserting the design, considering from the knitting station, this results in a pattern in the bottom

of the article.

  The base bar can be conveniently placed on the side of the design insertion bar system which is turned away from the knitting station, and can be separated from said system by a press bar. This provides a pattern applied to the

bottom of the article.

  According to an improvement of the invention, the system of insertion bars of the drawing can advantageously comprise

  four staggered rows which carry the points respectively

  the insertion of drawing threads according to a quarter of the finesse of the trade. Thus, the needles for inserting the drawing threads can be filled according to the full finesse of the trade. Despite

  the presence of the structural elements necessary for the position-

  in several places, said insertion needles

  do not hinder each other.

  As a variant, the design insertion bar system may conveniently comprise two offset rows which respectively carry the insertion needles for the design threads according to a quarter of the fineness of the loom. In this case, the number of insertion needles represents only 50% of the number of knitting needles. In this way also, it is possible

get staggered patterns.

  Preferably, the Jacquard command activates pre-

  better moving parts moving in the direction of the

  wedging, the needles for inserting the drawing threads, and the

  conds operating elements adjusting stops in order to limit

  move. Thus, three positions of the insertion needles

  drawing threads can be pre-established with a

  acceptable complexity. The second operating devices move

  wind preferably transversely to the direction

  offset. Said members may in particular consist of piezoelectric bending converters, as described in detail in the mentioned application DE-196 51 053.8.

above.

  In addition, the object sought by the invention is achieved

  thanks to a process characterized in that, following the combination

  due to the fundamental shift with a displacement of the

  the insertion of the drawing threads in a respective one of at least three positions, said drawing threads undergo a total offset operating selectively below one to four knitting needles, in the region of the preset pattern , partial regions with different total offset then being provided. The basic threads are preferably inserted in the form of a fringe, which is possible because the fringes

  are connected via drawing wires.

  The total shift can also take place, in part, below five knitting needles. This has the effect

  to increase the ability to stagger the pattern.

  Advantageously, the drawing threads can be partially inserted in the floating state. This allows the

  transition between a flat pattern and a cross-linked pattern.

  The drawing threads can advantageously be inserted in the form of a partial weft. These threads can also be linked, in the form of loops, in the stitches of the basic threads. The above-mentioned insertion methods have the characteristic

  common that drawing threads can take part in the forma-

  tion of the bottom of the article. However, this results in grounds

  totally different from an aesthetic point of view.

  Preferably, a number of drawing threads will

  sins is activated similarly in partial regions-

  the. In this way, very accentuated thick / thin patterns are obtained. A very effective two-color pattern can be obtained if the first and second drawing threads, made of a material

  different, can be alternately paired and be inserted

  res such that, in partial regions, a strong de-

  total timing of first design threads is combined with a smaller total offset of neighboring second design threads, and

Conversely.

  Furthermore, the invention relates to a warp knitted article with a pattern of a new type, in which, depending on the number of drawing threads with low insertion, we obtain

  pattern regions with thickness or density

pectively different.

  The knitted article according to the invention is characterized

  laughed at by a pattern with at least three stages of thickness

  sor / slimming in which are provided regions of pattern which are offset in the directions of the warp and the weft and have, between neighboring fringes, one or two or three

  drawing thread (s) with low insertion.

  Advantageously, a pattern with four thickness / slimming steps can be provided, in which four drawing threads with low insertion are present in additional pattern regions. The number of staggerings can thus be increased. According to an improvement of the invention, it is convenient to provide additional pattern regions in which a crosslinked structure results from the absence of a

  drawing wire with low insertion. This results in the transi-

  tion between a flat pattern and a cross-linked structure. The article according to the invention, of a new type, is also characterized by a two-color pattern produced in

  means of first and second drawing threads of a different material

  and in which pattern regions are provided which are offset in the warp and weft directions and in which only at least two first or only

  at least two second drawing threads, or else first and second

  conds drawing son, are present with low insertion between columns of neighboring meshes, in an identical or different ratio. When only one of the colors has a low insertion, it stands out clearly. If both colors are

  low insertion, this results in staggered lines.

  According to the invention, drawing threads can judiciously form a pattern in the bottom of the article or a

  pattern applied on the base threads.

  The invention will now be described in more detail, by way of non-limiting examples, with reference to the appended drawings in which: FIG. 1 represents the working area of a warp knitting machine according to the invention; Figure 2 is an illustration, on an enlarged scale, of the set of needles of Figure 1; Figure 3 shows a modified set of needles;

  FIG. 4 represents a set of needles during

use a press bar;

  Figure 5 shows another set of mo-

  dified; FIG. 6 is a diagrammatic illustration of the range of offset of the needles for inserting the drawing threads, in a first embodiment;

  Figure 7 is a similar illustration, in a se-

this embodiment;

  Figure 8 is a section of the support of a needle

  drawing of drawing threads; Figure 9 is the section along line A-A of Figure

8;

  Figure 10 is a section similar to Figure 9, in a second position of the stops; Figure 11 shows the insertion configuration

  of a warp knitted item with a four-step pattern

  thickness / thinness elements produced by the set of needles of FIG. 2; FIG. 12 illustrates the configuration for inserting a pattern with three thickness / slimming steps, produced by the set of needles of FIG. 2; Figure 13 shows the configuration of insertion of a two-color pattern produced by the set of needles of Figure 2; FIG. 14 illustrates the configuration for inserting a pattern with two thickness / slimming steps, produced by the set of needles of FIG. 3; FIG. 15 shows the configuration for inserting a pattern with four thickness / thinness increments, produced by the set of needles of FIG. 4; and FIG. 16 represents the configuration for inserting a pattern with two thickness / slimming steps, product

  by the set of needles of Figure 5.

  A work area 1 of the warp knitting loom of FIG. 1 has a row of knitting needles 2 on a bar 3 with knitting needles. Basic wires 4, engaged

  according to the full finesse of the trade, are issued through-

  diary of needles 5 for inserting the basic threads which are

  mounted on a base bar 6. This bar 6 can, for example,

  be driven back and forth in the direction of a knit weave.

  However, it is preferable that the base bar 6 produces fringes which give a coherent background by taking advantage of the drawing threads 7 described below. Said threads 7 are delivered by means of needles 8 for inserting drawing threads which are respectively arranged, according to a quarter of the fineness of the loom, in four offset rows 9, 10, 11 and 12 retained by supports 13 In this way, a system 14 with drawing insertion bars is obtained, on which the insertion needles

  tion 8 are arranged according to the full finesse of the trade. This sys-

  teme undergoes a common fundamental shift, for example

  above three knitting needles 2 (Figure 6) or above two knitting needles 2 (Figure 7). An adjustment device 15, only mentioned, ensures the fundamental offset; the insertion needles 8 are moved thanks to

  a Jacquard 16 control which, similarly, is only evo-

  quée. The set of needles of FIG. 1 is illustrated on an enlarged scale in FIG. 2. The needles 5 for inserting the basic threads are located between the knitting needles 2 and the needles 8 for inserting the drawing threads, arranged in four offset rows. In the embodiment according to FIG. 3, only two offset rows of the insertion needles 8 have been provided, so that the drawing threads are matched only according to half the skill of the loom. In the embodiment according to FIG. 4, the needles 5 for inserting the basic threads are located on the side of the needles 8 for inserting the drawing threads which is turned

  opposite the knitting needles 2, and are separated from the

  your needles 8 by a press bar 17. In this way it is possible to obtain press bar patterns when the drawing threads are paired according to the full finesse of the trade. The

  Figure 5 shows a variant in which only pre-

  views two offset rows with insertion needles

  tion 8, the corresponding structural arrangement nevertheless, for

the rest, in Figure 4.

  The needles 8 for inserting the drawing threads can be brought, by the Jacquard command 16, to three different stable positions respectively offset by a spacing 18 between needles. In Figures 6 and 7, these three positions are identified by the letters R (right), M (center) and L (left). When a fundamental offset is combined, above three knitting needles 2, when ordered according to three positions of the needles 8 for inserting the drawing threads, the possibilities of total offset indicated on the lines are obtained. a to e in FIG. 6. When the insertion needle 8 retains its position, the total offset corresponds to the fundamental offset (line a). If you move to the left end from the right position to the central position, you get a total offset below four hands (line b); and a total offset below five knitting needles (row

  c) if you win the left position at the left end.

  On the other hand, if you gain the central position at the far right, the total offset is only located below two hands (line d) and, if you gain the left position

  at the far right, this results in a total shift

below a needle (line e).

  If we choose, on the other hand, a fundamental shift

  below two needles only, this gives the possibilities

  bilities illustrated in figure 7. One can obtain a shift

  total age below two needles (line f), below

  three needles (line 9), below four needles (li-

  gne a), below a needle (line i) and below

  no needle (line k, corresponding to a floating thread).

  Figures 8 to 10 highlight a possibility

  reach the three stable positions of needle 8 of

  setting of the drawing threads. First operating members 19 and second operating members 20, installed on the support 13, can be actuated each other from the Jacquard command 16. These operating members are produced

  in the form of piezoelectric bending converters.

  The insertion needles 8 are fixed to the first members 19, by which they can be moved back and forth in the direction of the offset. The members 20 are movable transversely relative to this direction and carry, at the lower end, a stop block 21 which can be brought from the position of FIG. 9 to the position of FIG. 10, and vice versa. Block 21 has four fixed stops in the direction of the bar. Among these stops, an extreme left stop 22 and a first central stop 23 are operative in the position of FIG. 9; and, in the position of FIG. 10, an extreme stop 24 on the right and a second central stop 25 are operative. Concerning other particularities, we

  refer to the aforementioned patent application DE-196 51 053.8.

  In the insertion configurations of FIGS. 11 to 16, described below, the fringes formed by the base wires 4 are not shown. The lines with the hairline correspond to the fundamental offset of the system 14 with insertion bars of the

  drawing, the solid lines corresponding to the pace ef-

fective drawing threads 7.

  In the insertion configuration according to Figure 11,

  produced by the set of needles of FIG. 2 and use

  as long as the offset possibilities in figure 6, the drawing threads 7 are inserted below two knitting needles in region d, below one knitting needle in region e, below four needles knitting in the

  region b, below three knitting needles in the region

  gion a and below five knitting needles in region c, respectively materializing a partial weft. The designation of the regions then corresponds to the designation of the lines in FIG. 6. It can clearly be seen that the number of low insertions differs considerably between neighboring columns of meshes. Thus, the thickness of the pattern decreases from region c to region e, passing through region b, region a and region d. This results in a flat pattern with four thickness / thinness increments, with very thick, thick, medium and thin regions. In region e, the drawing thread 7 extends along the fringe, so that discontinuities or a net can also be

  respectively formed in the pattern.

  The insertion configuration of figure 12 is pro-

  also, by the set of needles in FIG. 2. The fundamental offset, evoked by the lines with an untied outline, is

  located above two knitting needles 2 like this

  corresponds to FIG. 7. A region k, in which the drawing thread 7 floats, succeeds in this case a region i in which the

  total offset is located below a needle. In the

  chain, there is a region f with a total offset

  underside of two knitting needles, a region g with a dice

  total setting below three knitting needles and a region h with a total offset below four knitting needles. Consequently, three regions f are obtained. g and h having an increasing number of low inserts of the drawing thread 7, extending between neighboring columns of meshes;

  that is to say a flat pattern with three thick increments

slim / slender.

  In the insertion configuration of Figure 13, pro-

  picked again by the set of needles in accordance with the fig-

  re 2 and comprising a fundamental shift at three steps

  elements according to FIG. 6, drawing wires 7 (in solid lines) and 7 ′ (in dotted lines), engaged alternately, are formed

  of a different material and have, in particular, a

  their different. In this case, the term "color" is also

  supposed to cover all other possibilities of different materials

  possible, for example matt and shiny drawing threads. In a region 1, the drawing threads 7 are inserted below five knitting needles, while the drawing threads 7 'are inserted only below one knitting needle. The drawing wires 7, forming two inserts

  low between neighboring columns of mesh, have a colora-

  markedly contrasted, however the 7 'drawing threads,

  placed along a fringe, are barely visible. He re-

  follows similar conditions in region m, in which

  the 7 'wires are inserted below four sorting needles

  dimensioning, and the yarns 7 are only below a knitting needle. The second color stands out clearly in this case. Intermediate gradations are obtained in the

  regions n and o, in which one of the drawing threads is inserted

  d below three knitting needles, and the other drawing thread below one knitting needle. By taking advantage of the three positions of the insertion needles

  sin, it is still possible to form additional combinations

  effects resulting in various bright effects.

  In the insertion configuration of Figure 14, pro-

  pick using the set of needles of Figure 3 and having

  a fundamental shift below three trico- needles

  step 2, knitting needles 2 and needle 5 to insert

  tion of the basic yarns present the full finesse of the trade; the two offset rows of the needles 8 for inserting the drawing threads, however, have, in common, only half the smoothness of the loom. A region a, with a total offset

  below three knitting needles, is followed by more

  different colored areas with different total offset in the

  direction of the frame. We meet a region a, e in the-

  which alternate a total shift below three points

  knitting and a total offset below a knitting needle; a region b, c, d, e in which shifts

  totals below four, five, two and a sorting needle

  cotage are neighbors; and a region b, a, c in which total offsets below three, two and five needles

  knitting are provided in the direction of the weft.

  The adjoining region e has a total shift

  below a knitting needle, and region c a total offset below five knitting needles. The result

  a flat pattern with two thickness / thinness increments, including

  carrying half the number of drawing threads.

  The insertion configuration of figure 15 is pro-

  picked up by the set of needles in accordance with FIG. 4, and operates with a fundamental offset below three knitting needles. Following the presence of the press bar pattern, the drawing threads 7 are linked, by loops, in the stitches of the fringes formed by the basic threads 4. Again, there is a region d with a total offset au- below two

  knitting needles, an e region with a total offset

  below a knitting needle, a region b with a deca-

  total length below four knitting needles, region a with total offset below three knitting needles, region c with total offset below five knitting needles, and additional regions a

  and F. This implies a four-step pattern of thick-

  sor / slimming which, however, is visible not in the sur-

  face, but on the article because of the press bar. The drawing threads form an authentic fringe in region e and an offset fringe in region f, which also allows

reticulated structure.

  The insertion configuration of figure 16 is pro-

  picked up by the set of needles according to FIG. 5 and presents

  a fundamental shift below three trico- needles

  tage, in accordance with figure 6. A region a, of a deca-

  the total yarn below three knitting needles 2, is

  then followed by a colored region a, e in which alter-

  total offsets below three and below a knitting needle. In direct continuity,

  finds a bright region b, c, a, d in which deca-

  total yarns below four knitting needles,

* below five knitting needles, below three

  knitting needles and below two sorting needles

  dimensioning follow one another in the direction of the frame. We meet, in the sequence, a bright region b, a presenting,

  in succession, total offsets below four knitting needles and below three knitting needles. Next comes a region e with a total offset below a needle, which in turn governs the formation of a fringe by the drawing threads; and a region c

  with a total offset below five knitting needles -

  ge. This again results, on the surface of the article, in a pattern with two thickness / thinness increments having half

the number of drawing threads.

  In many cases it is enough to create a pattern in re-

  current only at the measures described. However, one can also get additional effects by adding other

  patterns known to themselves. As highlighted by the fi-

  Figures 14 and 16, the pattern varies not only in the direction of the warp, but also in the direction of the weft. This also applies when a matching pattern is created

in Figures 11, 12, 13 or 15.

  It goes without saying that many modifications can be made to the invention as described and shown,

without going beyond its framework.

Claims (23)

-R E V E N D I C A T I ON S-   1. Warp knitting machine comprising a Jacquard control in which movable insertion needles   of drawing threads are carried by a bar system of insert-   tion of the design giving said needles the same fundamental offset; and a single base bar carrying non-displaceable insertion needles, a craft characterized in that the needles (8) for inserting the drawing threads can be moved, by the Jacquard control (16), to one of the 'at least   three stable positions respectively offset by one space-   ment (18) between needles; and by the fact that the fundamental shift   mental is chosen in such a way that the maximum possible total offset of said needles (8) for inserting the drawing threads takes place at least below four knitting needles (2). 2. Craft according to claim 1, characterized in that the offset of the base bar (6) takes place below a knitting needle (2).   3. Craft according to claim 1 or 2, characterized in that the needles (8) for inserting the drawing threads   can be placed in three positions, and the offset   damental is operated below two knitting needles (2). 4. Craft according to claim 1 or 2, characterized in that the needles (8) for inserting the drawing threads   can be placed in three positions, and the offset   damental is operated below three knitting needles (2).   5. Craft according to any one of claims 1 to   4, characterized in that the base bar (6) is arranged   before the system (14) with insertion bars of the drawing in consideration   rant from the knitting station.   6. Craft according to any one of claims 1 to   4, characterized in that the base bar (6) is arranged on the side of the design insertion bar system (14) which is turned away from the knitting station, and is separated   of said system by a press bar (17).   7. Craft according to any one of claims 1 to   6, characterized in that the bar system (14) for inserting   tion of the drawing comprises four offset rows (9 to 12) which respectively carry the needles (8) for inserting the wires   of drawing according to the quarter of the smoothness of the trade.   8. Craft according to any one of claims 1 to   6, characterized in that the information bar system (14)   setting of the drawing comprises two offset rows (9, 10) which respectively carry the needles (8) for inserting the wires   of drawing according to the quarter of the smoothness of the trade.   9. Craft according to any one of claims 1 to   8, characterized in that the Jacquard control (16) action-   ne of the first operating members (19) moving, in the direction of the offset, the needles (8) for inserting the drawing threads, and second operating members (20) adjusting   stops (22 to 25) in order to limit displacement.   10. Method for manufacturing a warp knitted article with a pattern, on the warp knitting loom according to any one   claims 1 to 9, method in which drawing threads   can be moved by insertion needles   sin, via a Jacquard command, and present   try the same fundamental shift; and basic threads are delivered in a single ply, by non-displaceable insertion needles, method characterized in that, following the combination of the fundamental offset with a displacement of the needles (8) for insertion of the drawing threads to the respective one   at least three positions, said drawing wires (7) undergo   feels a total offset operating selectively below one to four knitting needles (2), in the region of the   preset pattern, partial regions with total offset differ- then being provided.   11. Method according to claim 10, characterized in that the basic son (4) are inserted in the form of a fringe. 12. Method according to claim 10 or 11, characterized in that the total shift also takes place, in part,   below five knitting needles.   13. Method according to any one of the claims   10 to 12, characterized in that the drawing threads (7) are   partially inserted in floating state.   14. Method according to any one of the claims   to 13, characterized in that the drawing threads (7) are   inserted as a partial frame.   15. Method according to any one of the claims   13, characterized in that the drawing threads (7) are linked, in the form of loops, in the stitches of the basic threads (4).   16. Method according to any one of the claims   10 to 15, characterized in that a number of neighboring drawing threads (7) are activated in a similar manner in partial regions.   17. Method according to any one of the claims   to 16, characterized in that the first and second wires   drawing (7, 7 '), made of a different material, are ap-   similar in alternation and are inserted in such a way that, in partial regions, a large total offset of the first design threads is combined with a smallest total offset of   second neighboring drawing threads, and vice versa.   18. Patterned warp knitted article, characterized by a pattern with at least three thickness / thinness increments in which pattern regions (a, b, d; f, g, i) are provided which are offset in the directions of the warp and the weft and present, between neighboring fringes, one or two or three   drawing thread (s) (7) with low insertion.   19. A knitted article according to claim 18, character-   laughed at by the fact that a four-step pattern is provided   thickness / thinness elements, in which four drawing threads (7) with low insertion are present in pattern regions additional (c; h).   20. The knitted article according to claim 18 or 19,   characterized by the fact that regions of higher motif are provided   additional (e; i) in which a cross-linked structure results from the absence of a drawing thread (7) with low insertion. 21. Warp knitted article with a pattern, characterized by a two-color pattern produced by means of first and second drawing threads (7, 7 ′) made of a different material, and in which pattern regions are provided (1, m, n, o) which are offset in the warp and weft directions and in which only at least two first or only at least two second drawing threads, or else first and second drawing threads, are present with low insertion between columns   of neighboring meshes, according to an identical or different ratio proud.   22. Article knitted according to any one of the claims   cations 18 to 21, characterized in that drawing wires   (7) form a pattern at the bottom of the article.   23. Article knitted according to any one of the claims   cations 18 to 21, characterized in that drawing wires   (7) form a pattern applied to the base threads (4).