FR2570096A1 - DEVICE FOR CHAIN KNITTING FABRIC, ESPECIALLY FOR SEWING KNITTING FABRIC, FOR INTENSIVE STRENGTHENING OF THE TABLECLOTH - Google Patents

Abstract

DEVICE CHARACTERIZED IN THAT BELOW AND AT A CERTAIN DISTANCE FROM THE ROW OF BEARD NEEDLES 1, THE TRADE INCLUDES 6 DEVICES WHICH ARE MOUNTED ON A BAR 9 LIKE A COMB AND THAT ENGAGE BETWEEN THE BEARD NEEDLES 1 BY MAKING A LIFTING AND OSCILLATING MOVEMENT IN THE DIRECTION OF THE UNREINFORCED FIBER 7 PARTS OF THE STITCHED TABLECLOTH 8.

Description

The present invention relates to a device

  for loom & knitting, especially for loom

  cot sewn, for intensive reinforcement of the web, during the manufacture of light textile products made up of a loose web of fibers and / or elementary yarns, by formation of rows of perpendicular meshes formed from parts of fibers of the sheet of fibers and / or elementary yarns, the loom comprising pointed beard needles, which can be closed by slides and each have a hook at the front of their point, and being provided with a fixed felling plate located behind

  the sheet of elementary fibers or yarns and a provision

  sitive for guiding the sheet of fibers and / or ele

  in front of which is a counter-holding device, parallel to the row of beard needles, fitted with a support device for the finished textile product being placed under the counter-device and under the

  beard along the device in question.

  A profession for manufacturing a textile product consisting of a sheet of fibers and / or elementary yarns is already known (DD-PS 99 403). In this trade, beard needles are associated with a counter-device for holding the loose web of fibers and / or elementary yarns.

  and a device for supporting the finished textile product, which

  wager the uln in the other like the teeth of a comb. The

  counter-holding device is adjustable in the direction

  tion of the row of bearded and perpendicular needles-

  lie to her. Below the beard needles and at a distance from the felling deck less than that of the

  counter-holding device, the trade includes a provision

  support sitive whose plates engage between the plates of the counter-holding device. The counter-device of

  support and the support device are placed one relative

  port to another in such a way that they form a disposi-

  slaughter, the passage interval reserved for the tablecloth

  of fibers and / or elementary yarns being larger than

  above beard needles than below needles

  with beard. The purpose of the repelling device is to

  In the area of the beard needles, there will be a packing of the fibrous material which ensures the arrival of a sufficient quantity.

  with fibers in the hooks.

  However, the plates of the hand-held counter device

  your and the support device compress, in the area of

  beard needles, the web of fibers and / or elemen-

  not reinforced in such a way that they increase not only the number of fibers bound in the meshes, but also that of the fibers which are not bound in the meshes between the different rows of meshes. This results in the formation of a knitted fabric sewn of tablecloth which, as regards the resistance to reported tearing

  to the dimensions of the surface, presents no improvement

  tion in relation to sheet products manufactured by means of other mechanical reinforcement devices comprising needles forming stitches. In addition, the

  method of construction of the support device and the counter

  holding device, due to their dimensions and

  travel conditions, is very expensive.

  The object of the invention is, by a mechanical reinforcement

  intensive of the sheet of fibers and / or elementary yarns

  res, to increase the solidity of the products, in particular in the case of knitted fabrics sewn to the web and, therefore, to widen

  the fields of use of these textile products.

  The object of the invention is therefore to achieve a dis-

  positive for warp knitting looms, in particular for sewn knitting looms, making it possible to manufacture a light textile product constituted by a loose web of fibers and / or elementary yarns, with which one can form in stitches, in a way continuous, a layer of material

preferably thin.

  This object is achieved, according to the invention, because the loom comprises, below the row of needles to

  beard and at some distance from this row, dis-

  positive, mounted on a bar like a comb, which engage between the beard needles by carrying out a lifting and / or oscillation movement in the

  direction of the unreinforced fibers of the tablecloth knitted fabric.

  Due to the use of this device according to the

  vention arranged like a comb, the fibers which, in the knitted fabrics sewn with tablecloth already known, are between the -rows of stitches and participate only very little in the solidity of the product, are seized and raised above the points of needles with beard, so that in the next work cycle they are again grabbed by

  the beard needles and reinforced with an additional strap

  to hush up. Under these conditions, the proportion of the fibers linked in the meshes clearly increases, so that it is

  the same for the solidity of the knitted fabric sewn.

  Various other features of the invention res-

  emerge from the detailed description which follows.

  An embodiment of the object of the invention is shown, by way of nonlimiting example, in the accompanying drawing. Figure 1 is a cross section schematically showing the area of mesh formation in a

knitting loom.

  Figure 2 is a top view corresponding to the

figure 1.

  The knitting area, represented by FIG. 1, of a knitting loom designed for the manufacture of light textile products constituted by a loose web of fibers and / or elementary yarns comprises needles

  with beard 1 likely to perform a back and forth movement

  comes and has, for example, the shape of sliding needles.

  The needle hooks 10 are opened and closed by closing threads 2. These closing threads 2 close the hooks 10 when the beard needles 1 come out, retreating from the ply 7 of fibers and / or threads

  elementary 7 and pull the loops of fibers which are

  wind on the beard needles 1 and are formed, during the previous operation, from the loops of driven fibers 11. Under these conditions, the ply 7 of fibers and / or elementary yarns is transformed into a knitted fabric sewn to ply 8 produced by means of stitches 12 formed on the right side from the fibers of ply 7. The ply 7 made of elementary fibers and / or yarns and the knitted fabric sewn to the finished ply 8 are, in the zone of formation of the stitches, guided between a fixed dtabatage plate 3, perpendicular to the beard needles 1, and the counter-holding device 9 which is constituted by the engagement plates 4 located opposite, and also the support rail 5 located below the

beard needles 1.

  Also below the row of beard needles 1

  and at a certain distance from this row, the loom com-

  takes, mounted like a comb on the bar 9, devices 6 which engage between the beard needles by carrying out a lifting and / or oscillation movement

  in the direction of the parts 7 of the non-reinforced fibers.

  These devices 6 preferably consist of

wires or turntables.

  At the start of a new mesh formation cycle, the beard needles 1 are in rear dead center in the felling plate 3 and their hook 10 contains a half-mesh 11 consisting of bundles of fibers. When moving beard needles 1 forwards, the thread

  2 is withdrawn further back and the hook -

  needle 10 which was previously closed opens, so that when the beard needles 1 penetrate into the web 7 of fibers and elementary son, the half-mesh ll can slide on the needle shaft. In this phase, the devices 6 engage below the beard needles 1 between the rows of stitches formed during the

  previous work and, as a result of their supporting movements

  lifting and / or swinging, raise the parts of unreinforced fibers, which lie between the rows of perpendicular stitches, above the tips of the beard needles 1, Therefore, it is impossible that, when the needles beard 1 penetrate into the ply 7 of fibers and / or elementary yarns, the parts of fibers which are between the stitches of the rows are not

  pushed in the direction of knitted fabric 8.

  When the beard needles 1 have reached the front dead center, the devices 6 move in the direction of withdrawal of the ply-stitched knit 8, release the parts of fibers raised and then facilitate the withdrawal. During the

  recoil of the needles With beard 1, the parts of fibers lifted

  can be seized by the needles and then participate in the formation of the stitches. As a result, during the manufacture of knitted fabrics with light webs, there are

  a maximum quantity of fibers which intervenes in the

  mation of the stitches and that, as a result, the solidity of these knitted fabrics sewn to the ply can be improved in a considerable way.

Claims (5)

  1 - Device for chain knitting looms, in particular   - for sewing knitted looms, for intensive reinforcement of the web, during the manufacture of light textile products made up of a loose web of fibers and / or elementary yarns, by forming perpendicular rows of stitches, the loom comprising pointed beard needles which can be closed by slides and each have a hook at the front of their point and being provided with a fixed felling plate,   located behind the sheet of fibers and / or elementary yarns   res, and a counter-holding device and a device   support structure, characterized in that below and at a certain   distance from the row of beard needles (1), the loom includes devices (6) which are mounted on a bar (9) in the manner of a comb and which engage between the beard needles (1 ) by making a movement of   lifting and / or oscillation in the direction of the   unreinforced fiber ties (7) of the tablecloth knitted fabric (8).   2 - Device according to claim 1, characterized in that the devices (6) are constituted for example by wires or plates.   3 - Device according to one of claims 1 or 2,   characterized in that the devices (6) are associated with   plates (4) pushing on the fibers.   4 - Device according to one of claims 1 to 3,   characterized in that the devices (6) are placed between   the tips of the needles in place of engagement plates- ment (4).   5 - Device according to one of claims 1 to 4,   characterized in that the devices (6) are located   above the beard needles (1) while these beard needles (1) penetrate into the web of fibers (7) in the opposite direction of the passage of the product and below the beard needles (1) while the beard needles (1) grab   fibers in the direction of product flow.