FR2474544A1 - KNITTING DEVICE FOR A KNITTING MACHINE - Google Patents

Abstract

STITCH PRESSING DEVICE FOR A KNITTING MACHINE, WHICH ACTS BETWEEN THE NEEDLE FONTURES 14, 15 ON THE MESH 19, 20 RETAINED BY THE NEEDLES 12, 13 AND WHICH INCLUDES AN ELONGATED PROFILED PART PROVIDED WITH A SUPPORT HAVING A STRAIGHT SECTION IN SHAPE OF A ROOF, FOR EXAMPLE THE PROFILE OF A CORNER WITH EQUAL BRANCHES. THE HOLLOW INSIDE SIDE 10 OF THE PROFILED PART WITH A RIGHT SECTION IN THE FORM OF A ROOF IS OPPOSED TO THE SUPPORT OR IS TURNED TOWARDS THE MESH. THE SPECIAL STRAIGHT SECTION SHAPE OF THIS STITCH PRESSURE DEVICE ALLOWS BETTER ACTION ON THE KNITTED, INDEPENDENT OF THICKNESS OF THREAD, TYPE OF KNITTING OR OTHER IRREGULARITIES WHICH OCCUR DURING MESH FORMATION.

Description

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The present invention relates to a press device

stitches for a knitting machine with split needles

parts in at least two needle beds and controlled by a carriage moving above the needle beds, in order to act on the meshes retained by the needles between the needle beds by a command

alternative of the mesh press device by the carriage, this

positive mesh press with an elongated portion which is

provided with a support and which comprises at least one shoe.

According to the German patent 1,956,190, a knitting press device for knitting machines is already known comprising needle beds arranged in a V shape. In this system, each pair of skids is formed from a single metal strip of section

rectangular right.

In a variant of a conforming mesh press device

me to the German patent application no 2,649,387 of the applicant,

we use a combination of overlapping pads, to allow

Also be the use of the device with different types of knitting. The skates shown in the figures clearly have circular cross sections, without this being specified.

in the text.

In an improved mesh press device corresponding to

According to German patent application No. 2,707,637, the width of the shoe of rectangular cross section is reduced in

specific parts, which is advantageous with a view to cooperation

  tion with a control device required for different

types of knitting.

  Finally, according to German patent application No. 2,707,636, a mesh press device is known in which

different thicknesses are associated with different areas of ac-

tion. For this purpose, it is possible to use a curved metal wire of uniform diameter, or else a wire consisting of sections of

different stepped diameters, or a metal strip

astonished.

  All known mesh press devices up to

However, the drawback is that, for different types of knitting, the flexible pads are easily separated

knitting in the area of the movable needles and are thus spread

  tees from their normal position. It has also been found that, with the solid profiles used up to now, of circular or rectangular cross section, for the retaining pads, the contact

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  with knitting, especially during irregularities in training

stitches, always occurs at the highest point of the ran-

  last formed and thus results in an in-

work safety.

  The object of the invention is to give the mesh press device a cross-sectional shape suitable for exerting a better action on the knitted fabric, regardless of the thickness of the thread, the type of knitting or other irregularities occurring.

during the formation of the meshes.

  This problem is solved according to the invention by the fact that the elongated part is constituted by a one-piece profiled part having a cross section in the shape of a roof and the inner side of which

hollow is opposite said support.

  The roof section cross section can

be formed by an angle with equal branches or by a pro-

semi-circular section yarn.

  Advantageously, the profiled part has recesses

elements extending in the longitudinal direction, said profiled piece being able, in the region of said recesses, to be wider

than in other areas.

  Other advantages and characteristics of the invention

  will be highlighted in the following description, given at

by way of nonlimiting example, with reference to the appended drawing in which:

  Figure 1 is a partial view of a press device

  stitches for a straight knitting machine comprising two knitting systems,

  Figure 2 is a front view of a press device

mesh according to the invention, Figure 3 is a sectional view on an enlarged scale according to III-III of Figure 2, Figure 4 is a sectional view on an enlarged scale along IV-IV of Figure 2, Figure 5 is a view along A of FIG. 2, on an enlarged scale,

  Figure 6 is a section of the needle beds,

  presented on an enlarged scale with the mesh press device according to the invention, and

  Figure 7 is a section of needle beds, sem-

  table in Figure 6 but corresponding to another

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example of realization.

  The mesh press device 1 represented in FIG. 1 comprises two mesh presses 2. Each mesh press 2 comprises a shoe 3 which intervenes when the carriage moves from right to left on the knitting machine and a shoe 4, which occurs when the carriage moves in the opposite direction. Stops 5 and 6 are used to ensure the inversion of the mesh presses

each end of travel of the carriage.

  The possibilities of fixing the mesh press device

  1 on the carriage and its reversing members are known and do not

trent not therefore within the scope of the invention. They have therefore not been shown in the figures and will not be

  also not described below.

The pads 3 and 4 are connected to a retaining part 7, which is fixed to a lever 8 using known means, and

not shown.

  The pads 3 and 4 (Figure 2) constitute a roof-shaped profile, which has been shown in more detail in Figure 3. The roof sections 9 form an angle a between them, which

is smaller than the angle d formed by the needles which cross

  sent (figure 6). The lower side of the roof delimits a cavity 10.

As further shown in Figure 2, the pads 3 and 4 have recesses 11 which extend along a length b

in each of pads 3 and 4.

The recesses 11 have been highlighted in the figures

4 and 5. The profile is widened on both sides, in the area of the evi-

  dement il, from a distance c and it presents in this zone the

property to flex elastically.

The situation shown in Figure 6 is obtained immediately before the needles 12 and 13, which are arranged so as to move individually, in a conventional manner in the needle beds 14 and 15, have been moved by the locks

  of knitting the carriage (not shown).

  During knitting on the two needle beds, knitting 16 is held in place by stitches 19 and 20

found in needle hooks 17 and 18.

  The roof-shaped shoe 3, which fills the existing volume

  both between the felling partitions 21 and 22 of the needle beds 14 and 15, exerts pressure, by means of the cavity 10, on either side of the meshes formed last. Accumulations

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mesh or other irregularities in the knitted structure can then easily penetrate into the cavity 10, without modifying

the position of the mesh press.

  The precise lateral guidance of each shoe is favored by the fact that the enlargement provided near the recess il (FIG. 5) can be applied without play and elastically against

slaughter partitions 21 and 22.

  When, however, the position of the mesh press has to be changed, the roof-shaped profile allows a gentle sliding when the needle hooks 17 or 18 move on the inclined surfaces of the roof, because their angle is smaller than

formed by crossing needles.

  The same advantages are also obtained with the profile variant shown in FIG. 7. The beginning of the semi-circular profile 23 is placed in a plane below the zone of displacement of the needles and it thus makes it possible to remove the

risks during work.

  With reference to the figures, a mesh press device has been described which comprises in its end zones a shoe, which is pivotally mounted on the carriage of the knitting machine and

  which is automatically reversed at each end of the carriage travel.

Unlike this structure, it is also possible to provide for each direction of movement a separate mesh press, which is then lowered or raised automatically at each end of travel of the carriage. Such separate mesh presses are

also advantageously arranged in the form of a pro-

  yarn according to the invention and having a shaped section

roof.

  It goes without saying that the mesh press device according to

the invention allows knitting both on a needle bed

  guilles only on two needle beds, in which case we can form

  identical or different rows of stitches.

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Claims (5)

  1. Mesh press device for a knitting machine comprising needles distributed in at least two needle beds and controlled by a carriage moving above the needle beds, in order to act on the meshes retained by the needles between   the beds by an alternative control of the press device   mesh by the carriage, this mesh press device comprising an elongated part which is provided with a support and which comprises at least one shoe, characterized in that the elongated part is constituted by a monobloc profiled part having a straight cross-section roof and whose hollow interior side (10) is opposite to said support (7). 2. A mesh press device according to claim 1, characterized in that the profiled part with a straight section in roof shape is an angle iron with equal branches.   3. A mesh press device according to claim 1, characterized in that the profiled part with a straight section in roof form consists of a semi-circular section profile cular. 4. Mesh press device according to any one of Claims 1 to 3, characterized in that the profiled part   has recesses (11) which are oriented in the longitudinal direction. 5. A mesh press device according to claim 4, characterized in that the profiled part is wider in   the recess area (11) than in the other areas. AL / GB / 50526