DE2064526A1 - Method and device for loop formation on circular knitting machines - Google Patents

Description

Patent attorney

. Dr. Walther 3unius

Hanover, Abfaesir. 20 _{29 # ΒθΖβπιΐ3β} Γ 1970

Dr..J / K. My file: 1956

ELITEX - Zavody textilnilio stroj / renstv /,

· /
generalni reditelstvi, Literec

Method and device for loop formation on circular knitting machines

The present invention relates to a method and a device for loop formation on circular knitting machines for the production of stockings with the help of a needle system and sinkers assigned to it.

In known circular knitting machines for the production of hosiery move the containment sinkers in a horizontal direction, their function mainly on the tee of knitwear is set. The stitch formation is done by knitting yarn over a constantly the same Sinker level of sinkers, the mesh size of

109830/1228

2064525

the needle depth below the mentioned level of the sinkers depends. The stitching is So in these designs of knitting machines depending on the needle movement.

The main part of these circular knitting machines is that it is necessary from the standpoint of the friction of the cultivated yarn over sinkers and needles, the pitch angle on a cam lock part by which the needle movement is controlled, relatively to have large, so that the number of simultaneously cultivated needles does not exceed the limit at which due to high friction, the yarn tension is increased to such an extent that the yarn tears. A large angle of incline However, the gate lock part limits the possibility of increasing the operating speed of the Machine and causes a considerable susceptibility to failure and a considerable consumption of needles on the machine .

The invention overcomes these disadvantages.

The invention consists in the fact that in the formation of stitches a part of the weft movement by means of needles and a part is carried out by means of inclined movement of containment plates.

The method is advantageously carried out on a device according to the invention, the essence of which is

1098 30/1228

20S4526

stands that the boards in slots or grooves one outer sinker ring and an inner sinker guide sr ing it slidably mounted and to the needles are inclined at an acute angle.

The advantage of the method and apparatus of the invention resides in the fact that, when present of a pitch angle on a cam lock part as in known devices the number of needles during of killing is smaller. In addition, the specified deficiencies have been eliminated without affecting the construction of the Machine and its operation would be more complicated than with known devices.

The essence of the invention as well as further advantages and features of the invention are shown below with reference to one in the Drawing schematically illustrated embodiment explained in more detail. Show it:

Fig. 1 is a longitudinal section through the axis of a circumferential Needle cylinder of a circular knitting machine with built-in inner sinker guide ring and attached outer sinker ring at the bearing point of a latch needle and a corresponding ™ chenden circuit board;

Fig. 2 is a side view of a needle and sinker at the beginning of their sinker movement;

3 is a side view of a needle and sinker at the end of their sinker movement;

Fig. 4 shows a loop formation process according to the previously known Procedure;

- 4 109830/1228

5 shows a loop-forming process according to the method according to the invention.

Enclosing sinkers 1 are with their foot part 2 in slots or grooves 3 of an outer sinker ring 4 and with their Head part 5 mounted radially displaceably in slots or grooves 7 of an inner plate guide ring 9, wherein the grooves 3 and 7 are in alignment. A nose 6 of each containment board 1, which in an inside Plate guide ring 9 provided continuous annular groove

8 occurs, serves to guide the sinker head part 5

in the associated groove 7 · The inner plate guide ring

9 is in the upper part of a rotating needle cylinder 10 and the outer sinker ring 4 on the outer diameter of the Needle cylinder 10 attached in a known manner, with needles mounted in the longitudinal grooves 11 between ribs 12 13 are operated with the aid of lock parts, not shown. The outer sinker ring 4 is with a cover provided, through which the foot parts 2 of the sinkers 1 in the grooves 3 of the sinker ring 4 are held down. On the inside of the cover 14, key parts (not shown) are provided, which in the exemplary embodiment are represented by a plate guide groove 15 through which, depending on their shape, the radial movement of the boards 1 is caused by the working feet 16 of which engage in the board guide groove 15. The single ones Sinker working feet 16 are under the action of an endless spiral spring 17, which projections 18 of the spanned individual boards 1, pressed against an effective inner wall of the board guide groove 15. The grooves 3 and 7 and the annular groove 8 assume an inclined position,

_ 5 _ 109830/1228

2084526

thus one between sinker working feet 16 and corresponding Heads of the needles 13 lying angle o * - is an acute angle.

The drive of individual parts of the device takes place in a known manner and is therefore, as well as the design of the needles 13 and the functional surfaces of the sinkers 1 are not described.

The stitch formation according to the method according to the invention runs

measure:

It runs on the device described as follows

In the starting position in which the needle 13 is in the lowest position, it is with its head between the sinkers 1 (Fig. 5). In the needle hook 19 lies a loop 20 of a knitted fabric 21 and a needle tongue 22 closes the needle hook 19 or leaves it open.

In the tee movement, the board 1 moves in Pfeilriohtung S (Fig. 1) obliquely to the associated needle 13% and detects a hanging in the needle hook 19 row of stitches.

At the same time sioh moves the needle 13 in the direction of naeh even, so that in the direction of the arrows after the plate movement has been completed S the loop 20 of the row already formed rom the needle hook 19 slips onto the needle shaft 23. Well then the Masohen row is held by the sinkers 1, cannot lift one with needle 13 at the same time.

109830/1228

^ ™ O "" "

As soon as the loop 20 slides over the needle tongue 22, the needle 13 moves in a downward direction, whereby the board 1, as a result of its return movement, loosens the previously held row and thus relies on the formation prepared for another row. During a downward movement of the needles 13, even earlier than it closes the needle hook 19 through the needle tongue 22 with the aid of the displaced on the needle shaft 23 Stitch 20 comes, yarn 24 is inserted into the needle hook 19 by a device (not shown) (Fig. 5) introduced. As a result of further downward movement of the needle 13, the needle hook 19 is closed by the needle tongue 22, in which the yarn 24 is inserted. The needle 13 continues its downward movement and in cooperation with the sinker 1, which again moves obliquely to the needle 13 in the direction of arrow S, it comes to Kulate a nine mesh 20. At the Kulate the mesh 20 takes both the vertical movement of the needle 13 and the oblique movement of the plate 1 in the direction of the arrow S part. The movement of the needle 13, like the movement of the plate 1, is relatively small, which is why the helix angle of the Kulx wear part, not shown, is smaller than in known machines is.

In the mement in which the stitch knitting is finished, the needle 13 is in the starting position.

- 7 -109830/1228

Claims (2)

2064528 Patent claims: Method for loop formation on circular knitting machines, in particular small diameter circular knitting machines for Production of stockings with the help of a needle system and blanks assigned to it, characterized, that in the formation of the stitch a part of the gate movement by means of needles and a part by means of inclined movement of containment plates. 2. Device for performing the method according to claim 1, characterized, that boards (1) in grooves (3, 7 and 8) of an outer Sinker ring (4) and an inner sinker guide ring (9) mounted displaceably and to the needles (13) are inclined at an acute angle (oC). 109830/1228 Blank page