JPS5812380B2 - Warp knitting machine and its usage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a warp knitting machine having two needle bars, the knitting needles of which constitute one needle bed, and a common stitch escape lever. .

Warp knitting machines in which the knitting needles of both needle bars are arranged alternately on a common needle bed and are controlled by a Jacquard are known (see "Warp Knitting Machines" by Michael, Vol. 12, published in 1952).
(pages 1-125).

In this case, all knitting needles have the same stroke, the same yarn feed position and the same stitch exit position.

In this manner, a stitch row is obtained in which adjacent stitches are alternately offset from each other in the warp direction.

This type of patterning, which requires two machine cycles to produce each stitch row, is common in single-needle bed warp knitting machines with only one needle bar, e.g. It can be used in addition to the patterning that is performed by controlling the yarn feeding device.

Furthermore, all the knitting needles are assigned to one and only bar, so that in order to produce a pile fabric, the yarn for the ground knitting structure is fed to the even-numbered knitting needles, and the pile yarn is fed to the even-numbered knitting needles to produce the pile fabric. A single needle bed type warp knitting machine in which yarn is alternately fed to odd-numbered knitting needles is known.

In this case, the pile yarn is knitted on the even numbered knitting needles and thrown off on the odd numbered needles in the next knitting cycle.

However, in this case the height of the pile loops is related to the pitch of the knitting needles.

That is, only short pile loops can be formed on the right side of the knitting pile.

An object of the present invention is to provide a single needle bed type warp knitting machine capable of knitting a new knitted fabric or a pile knitted fabric having a pile loop length that is independent of the pitch of the knitting forceps.

According to the present invention, in the Type C warp knitting machine mentioned at the beginning, both needle bars can be driven at the same time or in the same direction, but have different strokes, and the yarn feeding point is approximately This was solved by having the stitches be equal but with different stitch exit points.

When a knitted fabric is manufactured in the usual format with such a warp knitting machine,
Since the stitch exit positions of the knitting needles are different, stitches of different sizes are formed.

This will result in a new organization.

Of course, in this case as well, another known patterning effect can be imparted to the knitting by controlling the knitting reed bar with a patterning chain.

A warp knitting machine of the above type in which knitting needles of both needle bars are combined every other time is used to produce a pile knitted fabric, and the yarns of the ground knitting structure are connected to the knitting needles of the needle bar with the shorter stroke. When the yarn of the pile loop is alternately fed to the knitting needles of the needle bar and the knitting needle of the other needle bar, the stitch exit point of the knitting needles is not related only to the pitch of the knitting needles. The pile loop associated with the difference in is also obtained.

Advantageously, the needle bars are each mounted on a lever, and the levers actuated by a common drive act on said levers with different lever arm lengths.

In this case, the common drive provides different magnitudes of stroke to the needle bar due to the different lengths of the lever arms.

Furthermore, at least one needle bar can also be attached to a lever in which the driven plunger engages with an adjustable lever arm length.

This allows the stroke of at least one needle bar to be varied.

Furthermore, it is advantageous to design the knitting needles as slider needles, the sliders being fixed to a common bar.

This simplifies construction and driving compared to using two slider bars.

Furthermore, the knitting needles of both needle bars may be arranged alternately in a ratio different from 1:1.

In this way, a consistent pattern related to the stitch size is obtained.

Furthermore, it is advantageous to vary the stroke of at least one needle bar during operation using a patterning device, so that the stitch size can be varied in order to form the pattern.

In an advantageous embodiment, particularly suitable for knitting pile fabrics, the stitch escape bar provides a wider needle path in the knitting needle range of one needle bar than in the knitting needle range of the other needle bar. have.

Assigning a wide needle path to a knitting needle with a short stroke is sufficient to knit one or more, often thick pile yarns, rather than knitting the yarns of the ground knitted structure with this knitting needle. space is given.

The narrow width of the other needle passage is sufficient because in this knitting needle the pile yarn is thrown out and no stitches are formed.

, 5 The invention will now be explained with reference to the drawings: in FIG. is shown.

The knitting needles themselves may be of any type and may be configured as tongue needles, press bar actuated barb needles, slider needles, etc.

All knitting needles 2, 4 are located in the same plane.

The knitting needles 2, 4 have different heights at the bottom dead center or stitch exit point shown.

At the top dead center or yarn feeding point, the knitting needles 2 and 4 have the same height as indicated by the broken line 5.

In FIG. 2, this relationship is illustrated for a warp knitting machine equipped with a stitch escape bar 6 having a stitch escape piece 7.

To make the drawing easier to read, the needle bar 1 with knitting needles 2 is shown in broken lines, and the second needle bar 3 with knitting needles 4 is shown in solid lines.

The needle bar 1 moves a distance h1 from the yarn feeding position shown on the left, and the needle bar 3 moves a distance h2.

As a result, the knitting needles 2, 4 assume different height positions shown on the right at the stitch exit point.

In this case, the heights of both knitting needles 2, 4 differ by X.

In a raschel machine in which the stitch escape bar 8 has a stitch escape comb 9, the knitting needles 2, 4 are constructed as slider needles.

Both knitting needles 2, 4 are located at the stitch escape position.

All knitting needles have a common slider bar with slider 11.
10 are assigned.

The slide bar 10 moves through a stroke h3 which approximately corresponds to the stroke h2 of the needle bar 3.

This means that at top dead center both knitting needles 2, 4 are at approximately the same height and are closed approximately simultaneously by the slider during the subsequent downward movement.

It is not a disadvantage that the slider protrudes beyond the hook of the knitting needle 2 at the bottom dead center.

In FIG. 4, needle bar 1 is attached to lever 12, and needle bar 3 is attached to lever 13.

Both levers 12, 13 are pivotable about a common axis of rotation 14 fixed to the frame.

The common drive shaft 15 has a cam disk 16 which includes a protrusion rod 18 connected to the lever 12 via a hinge 19 and a protrusion rod connected to the lever 13 via a hinge 21. 20 are supported via a sliding ring 17.

The spacing between the axis of rotation 14 and the hinges 19, 21 defines different lever arms.

Therefore, the needle bar 1 moves through a larger stroke than the needle bar 3 even though it is driven using the same cam disk 6.

In the embodiment shown in FIG. 5, in which the drive of the needle bar 3 corresponds to the drive of FIG. ing.

The eccentric body 23 is connected to the lever 2 via a chain 24, a gear set 25, another chain 26, another gear set 27, and a transmission member 28.
9.

The lever 29 is pressed elastically against a handle control device 30 in the form of a handle puller.

The eccentric body rotates the eccentric body from the left protrusion rod action point where the strokes of the knitting needles 2 and 4 are equal to the right protrusion rod action point where the knitting needles 2 have a larger stroke than the knitting needles 4. transferred by

Such adjustments can be made during operation.

However, in many cases it is sufficient to do this only at the start of operation.

This adjustment can also be effected in other ways, for example hydraulically using a piston or electrically using a magnet.

In Figure 6, the white circle indicates knitting needle 2, and the black circle indicates knitting needle 4.
It shows.

In this embodiment, the knitting needles 2 and 4 are arranged alternately in a ratio of 2:3.

In FIG. 7, the ratio of knitting needles 2 and 4 is 1:1.

The stitch escape piece 7 of the stitch escape bar 6 forms a small needle passage 32 with a width a for the knitting needle 2 with a larger stroke, and a needle passage 33 with a large width b for the knitting needle 4 with a smaller stroke. do.

This dimension can also be applied to the needle passages formed between the webs of the stitch escape comb 9 in the Latschiel machine shown in FIG.

In order to obtain knitted fabrics with stitches of various sizes,
For example, knitting needles 2 and 4 arranged as shown in FIG.
is supplied with thread in a conventional manner.

The yarn can also be supplied in accordance with a predetermined pattern.

Due to the different stitch withdrawal depths, the knitting needles 2 form larger stitches than the stitches formed by the knitting needles 4 in each stroke.

In order to produce a pile knitted fabric, when the knitting needles are arranged as shown in FIG. 7, the ground knitted structure is knitted using the even-numbered knitting needles 4 having a short stroke.

The pile yarn is alternately fed to knitting needles that throw out pile loops and knitting needles 4 that knit the pile yarn into the ground knitting structure.

Since the stitch withdrawal depths are different, a relatively long pile loop is also formed on the left side of the knitted fabric.

The wide needle passage 33 receives both the yarns of the ground knitting structure and the pile system to be knitted, whereas the narrow needle passage 32 receives the pile yarn to be released. It has the required width.

When producing pile knitted fabrics in this way, it is of course necessary to use all knitting needles whose closing movement is controlled so that the pile loops are reliably released, such as slider needles.

[Brief explanation of the drawing]

The drawings show several embodiments of the invention, the first being
The figure is a perspective view of both needle bars at the bottom dead center position, Figure 2 is a cross-sectional view of both needle bars in a warp knitting machine shown at top dead center and bottom dead center, and Figure 3 is a slider Transverse cross-section of both needle bars of a Ratsiel machine with needles shown at bottom dead center, FIG. 4 showing the drive common to both needle bars, FIG. 5 with adjustable stroke FIG. 6 is a schematic diagram showing the arrangement of knitting needles in both needle bars; FIG. 7 is a diagram showing the arrangement of knitting needles and a stitch escape bar having needle passages of different widths. It is a schematic diagram showing a format. 1... Needle bar, 2... Knitting needle, 3... Needle bar, 4... Knitting needle, 5... Broken line, 6... Stitch escape bar, 7... Stitch escape Piece, 8... Stitch escape bar, 9... Stitch escape comb, 10... Slider bar, 11... Slider, 12... Lever, 13...
Lever, 14... Rotating shaft, 15... Drive shaft, 16.
...Cam disc, 17...Sliding ring, 18...Protrusion bar, 19...Hinge, 20...Protrusion bar, 21...Hinge, 22...Support part, 23... Eccentric body, 24...
Chain, 25...Gear set, 26...Chain, 2
7... Gear set, 28... Transmission member, 29... Lever, 30... Pattern control device, 32... Needle passage, 33
...needle passage.

Claims (1)

[Claims] 1. In a warp knitting machine in which the knitting needles are equipped with two needle bars constituting one needle bed and a common stitch escape bar, the knitting needles 24 of both needle bars 1 and 3 can be driven simultaneously and in the same direction, and have different strokes h1 and h2 with substantially the same yarn feeding point but different stitch exit points. These levers 12, 1
a protrusion 18 actuable by a drive 15 common to 3;
20. The warp knitting machine according to claim 1, wherein the lever arms 20 are engaged with each other at different lengths. 3 At least one needle bar 1, 3 is connected to the needle 12
, and a driven protruding rod 18 is engaged with this lever 12 with an adjustable lever arm length.
Warp knitting machine as described in section. 4 Knitting needles 2 and 4 are configured as slider needles,
The warp knitting machine according to claim 1, wherein the slider 11 is fixed to a common slider bar 10. 5 Knitting needles 2 and 4 of both needle bars 1 and 3 are 1:1
The warp knitting machine according to claim 1, wherein the warp knitting machine is arranged alternately in a ratio different from that of the warp knitting machine. 6. The warp knitting machine according to claim 1, wherein the stroke of at least one needle bar is changed during operation by a pattern control device 30. 7. The stitch escape bar 6 has a needle passage 33 wider in the range of the knitting needles of one needle bar than in the range of the knitting needles of the other needle bar. Warp knitting machine. 8 Knitting needles are provided with two needle bars constituting one needle bed and a common stitch escape bar, and both needle bars 1
The knitting needles 2, 3 of both needle bars 1, 3 can be driven simultaneously and in the same direction, and have substantially the same yarn feeding point but different strokes with different stitch exit points. 4 is 1
Using warp knitting machines arranged alternately in rows, the yarn of the ground knitting structure is transferred to the knitting needles 4 of the needle bar 3 with the shortest stroke, and the yarn of the pile loop is transferred to the knitting needles of the needle bar 3. A method of using a warp knitting machine to produce a pile knitted fabric, in which yarn is alternately fed to the knitting needles of the needle bar 1 and the knitting needles of the other needle bar 1.