DE1164016B - Flat warp knitting machine with compound needles - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school KL: D 04 b

German class: 25 a -15/01

Number: 1164 016

File number: F 20509 VII a / 25 a

Filing date: June 13, 1956

Opening day: February 27, 1964

The invention relates to a flat warp knitting machine with compound needles, in which crank eccentric the compound needles and their slide harmoniously up and down as well as the punch needles relative to move the knitting needles back and forth in the transverse direction twice during a knitting cycle.

Such warp knitting machines can run very quickly and smoothly. Because the crank eccentrics there are no complicated lever gears downstream, which significantly transform the harmonic movements, but occur relative movements of the perforated needles to the knitting needles when laying the threads which do not correspond to the ideal conditions that can be achieved with crank eccentric drives. So come with the previously known machines of this type with several needle bars, which are different Carry out long underlays, the threads at different diagonals across the back and front of the knitting needles because they are at different heights of the knitting needles relative to the punch needles placed under and over the needles. The consequence of this is that the threads are of different lengths Need time to get into the needle hook. But with increasing machine speed takes the time available for the threads to take up their correct position in the needle hook stands, accordingly, especially since the slide closes the needle hook relatively early begins, so that the risk of misplacing resulting in drop stitches and mistakes in the Goods increase and the inertia of the threads begins to have an effect at high speeds.

In the relevant known warp knitting machines, the drive of the knitting tools is insofar as well relatively complicated than the relative movement of the needles across the knitting needle bar in the It is achieved that the knitting needle bar has an additional one in addition to its up and down movements harmonic transverse movement is granted. There is also an additional circular one for the perforated needles Movement imparting drive requires a further considerable structural effort, without thereby a relative movement between piercing and knitting needles is achieved during laying, due to which the threads of the various needle bar on the substantially at the same level Knitting needle shafts arrive.

The invention provides a flat warp knitting machine for compound needles in which the Relative movements between perforated needles and knitting needles are coordinated so that even at the highest machine speeds Fehllegun flat warp knitting machine with compound needles

Applicant:

Hobourn - F. N. F. Limited,

Burton-on-Trent, Staffordshire (UK)

Representative:

Dipl.-Ing. H. Beglich, patent attorney,

Regensburg, Lessingstr. 10

Named as inventor:

Alan William Henry Porter,

Burton-on-Trent, Staffordshire (UK)

Claimed priority:

Great Britain June 21, 1955 (No. 17 963)

genes are practically excluded. This is achieved according to the invention in that to generate an absolute movement of the perforated needles along a movement that is essentially transverse to the movement of the knitting needles lying flat elliptical track a part of a four-bar linkage forming a crank eccentric drive is provided and this drive is coordinated with the other knitting tool drives such that the elliptical path is traversed in such a way that at the beginning of the deliberation movement between the knitting needles, which perform the last part of their absolute upward movement, and the perforated needles, who perform the last part of their absolute horizontal movement and are at one end of the move upwards in an elliptical orbit, there is no substantial vertical relative movement and towards the end of the deliberative movement, the and punch needles pass through the reversal points of their trajectories and a perpendicular relative movement takes place before the actual knitting needle withdrawal movement. Get through these measures the threads securely in the needle hooks even at high machine speeds. The one for the individual Phases of the active cycle, the times available are largely used, so that acceleration peaks are avoided. In addition, the machine is also relatively simple in construction. An exemplary embodiment of the invention is described below with reference to the drawings. In this shows

409 510/58

F i g. 1 shows a cross section through part of a pin 21 carried by a handlebar 22 warp knitting machine according to the invention with the rotatable, which in turn around a fixed bearing 23 Knitting tools and their drive devices on a bracket 24 arranged on the bed 6

FIG. 2 shows a cross section like FIG. 1, which is pivotable. That the needle bar 17,18,19 better clarity because only the drive 5 facing away end of each arm 20 is with a device contains the knitting needles, large bore 25 is provided, which has a crank

FIG. 3 also shows a cross section like FIG. 1, but eccentric 26 on a second drive shaft 27 the active barrel only with the drive device. The second drive shaft 27 is of the needle slide, main drive shaft 7 through helical gear 28,

4 also shows a cross section like FIGS. 1, 29 and 30, 31 and an intermediate shaft 32, however, driven only with the drive device for the ben, which of a bearing 33 of the bed 6 and Lochnadelbarren, carried by a bearing 34 which is attached to a

FIG. 5 also shows a cross-section like FIG. 1, but the bracket 35 also arranged on the bed 6, however only with the drive device for the pia- is fastened. The helical gear 30 is double tines, 15 number of teeth like the wheel it drives

F i g. 6 is a time-path diagram in which the 31. In this way, the shaft 27 is made with the dop movement the knitting needles, slides, punch needles and pelten speed like the main drive shaft 7 on boards are related to each other, driven.

Fig. 7 shows the absolute trajectory of the hole. Conventional sinkers 36 with lugs 36a and

needles and 20 knock-off edges 36 b are on a sinker bar 37

F i g. 8 the trajectory of the curved knitting arranged, the needling of several over its length relative to the needle ends. divided arms 38 is carried. Each arm 38 is on

In the flat rocker arm 39 shown in the drawing, which in turn In the warp knitting machine, the knitting needles 1 are pivoted on a bracket 40 attached to the bed 6. and moved. Each needle is tubular with a 25 bar. The end facing away from the sinker bar 37 gene provided shaft, in which each arm 38 is independent of one arm 41 with one The needle moves a slide 12 up and down, which is pivotably connected to the angle lever 42. The angle this Way the needle hook while the shift lever 42 is arranged on a shaft 43, which which phases of the knitting process opens up over the entire length of the machine and closes. 3 ° and attached to the bed 6 at intervals

As shown in FIGS. 1 and 2, the knitting needles are 1 trestles 44 is carried. The second arm 45 of the on a plate 3 and with this on the needle bar 2 angle lever 42 is with a connecting rod 46 attached. The needle bar 2 is hingedly connected by several, which with one of the eccentrics distributed their length, arranged on rods 4 48 on the main drive shaft 7 comprehensive Boh brackets 3a carried. The rods move in 35 tion 47 is provided.

Guides 5 up and down. The guides 5 are When the machine is working, the needles 1

in turn on a machine bed 6 from box through the eccentric 11 to carry out the in F i g. 6-shaped cross-section attached, which extends over the entire length of the machine over the movement shown by curve A in the course. All the knitting elements of the machine are carried by the bed 6 of a knitting cycle during a complete turn. 40 rotation of the shaft 7 driven by 360 °. The one drive shaft 7 also extends transversely eccentrics 11 have an eccentricity of 0.635 cm, over the entire length of the machine and lies in a sump 8 so that the amplitude of the needle movement is 1.27 cm below bed 6. The slides 12 are moved in a similar manner by several bearings 9 distributed over their length by the eccentrics 15, which carry an eccentric which is attached to the bed 6. Each have a tricity of 0.559 cm, so that the amplitude rod 4 is connected by a connecting rod 10 with the up and down movement of the slide 1.12 cm of an eccentric 11 on the drive shaft 7. The eccentrics 15 are opposite on the shaft 7 (Fig. 2). The drive shaft 7 makes a fully rotated loop-forming process of the machine via the eccentrics 11 by an angle of 75 °, so that the phase of the slide constant rotation and moves the needles 150 movement of the phase of the needle movement by 75 ° once during each Stitching Vorgan- lags. The movement of the slide is in Fig. 6 tot up and down. The slide 12 (FIG. 3) are also shown by curve B. In the setting shown in this Kurtend in tubular shafts of the needles 1 ven shown the needle hook is through and attached to the slide bar 13, which from the slide between the crank angle positions blocks 13 a, which is distributed over the length of the bar 55 of 284.5 and 326 ° closed, arranged, carried. The blocks 13 α are the needle bars 17, 18, 19 and the hole

the brackets 3 α similar, are located on which the needles are with reference to F i g. 4 from right to needle bar 2 supporting rods 4 similar rods left and left to right back and forth with a 14 and slide in guides 14 a. The slide bar mainly horizontal movement component 13 is moved in exactly the same way as the needle 60, which has an amplitude equal to twice the bar 2 by eccentric 15 on the shaft 7 via the eccentricity of the eccentric 26, ie an amplification rod 16 up and down emotional. The needles tude of 1.40 cm. At the same time, the right and slider will work together in a known manner. End of arm 20 (FIG. 4) through eccentric 26. The machine has moved three needle bars 17, 18, 19 up and down. This upward and downward movement, each of which carries a row of perforated needles 65, is applied to the perforated needle bars 17, 18, 19 (FIG. 4). The needle bars 17, 18, 19 are carried by a plurality of arms 20 in proportion to the lengths of the two parts of the arm, which also transmit via 20 on each side of the pin 21. Which are distributed along the length of the bars. Each arm 20 is and the needle bars 17, 18 19 are moving away

Due to the aspect ratio, it is much smaller than the movement from right to left and left to right. As a result, the perforated needles move on the path indicated by curve X in FIG. 7 shown path. This path is essentially elliptical with the major axis approximately seven times larger than the minor axis. The punch needle movement component transverse to the row of knitting needles is indicated by curve C in FIG. 6 shown. The angular position of the eccentric 26 is set so that the needles are at the end of their movement on the back of the needles, ie on the left in FIGS. 1 and 4, after the knitting needle drive eccentric have reached their 90 ° position, as can be seen from the comparison of curves A and C in FIG. 6 results. Since the perforated needles swing twice as often as the knitting needles, they then reach their end position on the front of the knitting needles after their eccentrics have themselves reached the 180 ° position. This corresponds to point e on curve C in FIG. 6 and point e on curve X in FIG. 7; Point d on curve C in FIG. 6 corresponds to point d on curve X in FIG. 7. It follows from Fig. 7 that the punch needles during the part of the knitting cycle between points d, e have an upward movement component in the same sense as the movement of the knitting needles which during the same period one through the part of Curve A between points / and g in FIG. 6 perform the movement shown.

During the following 90 ° of the punching needle eccentric movement, that is between points e, d ' in FIG. 7, the path of the punching needles is essentially horizontal. According to curve A in Fig. 6, the knitting needles go down at the same time. In this way, the tendency of the threads, which are also laid over the needles in this period, downwards on the needle shafts, instead of resembling in the hooks, is counteracted.

Curve D in FIG. 6 shows the offset movements of the needle bars and needles during the knitting cycle. The deliberation takes place during the part of the curve between points h, j . At this time, as shown by curve A , the knitting needles are raised and, as shown by curve C, the knitting needles are on the side of the knitting needles on which the needle hook openings are located. The sinkers begin to retract according to the curve £ from the position in which their throats between the needle shafts are in engagement with the beginning of the goods. This movement is brought about by the eccentrics 48, which move the connecting rods 46 up and down and thus pivot the angle levers 42 about the shaft 43. This pivoting movement is transmitted to the sinkers 36, which move back and forth with reference to FIGS. The sinker noses 36a reach their position in which they are withdrawn from the needles at 320 ° and their position in which they are completely advanced against the knitting needles at 140 ° of the knitting cycle, as can be seen from FIG. After thinking about it, the needles quickly swing to the back of the knitting needles, and these move downwards. At 290 ° of the knitting cycle, the needles according to curve D in FIG. 6 begin their underlay. At this moment they are at the end of their swinging movement on the back of the knitting needles. That they take this position at this point in time, as well as the following back and forth oscillation, is not important, however, since the knitting needles are pulled back down between the sinkers. The threads run from the last knitted stitches across the knock-over edges of the sinkers when the noses are almost completely withdrawn, and then in the longitudinal direction of the row of needles to the perforated needles when they have been underlaid. The latter ends at 80 ° of the cycle of action following the one shown. At this point in time, the sinkers have moved with their noses between the knitting needles again.

The curve Y of FIG. 8 shows the movement of the knitting needles relative to the punch needles. Their relative movement between points b and / corresponds to the part of curve D in FIG. 6 between points h and /, between which the perforating needles perform the consideration. The relative movement of the knitting needles to the punching needles has essentially no vertical component before point k on curve Y , ie the knitting needles and the punching needles are moved in the same direction in the vertical direction during this part of the consideration, namely upwards. A vertical relative movement occurs only during the second half of the consideration movement.

Instead of articulating the arm 20 carrying the needle bars 17, 18, 19 to the pivot lever 22, the pin 21 can be carried by a guide which inevitably parallel it on a straight line moved to the straight part of the arm 20.

The length of the major axis of the elliptical needle hole depends on the number of needle bars away. The greater the number of needle bars, the longer the larger axis of the ellipse must be be.

Claims (2)

Patent claims: 1. Flat warp knitting machine with compound needles, in which crank eccentric the compound needles and their slider harmoniously up and down and move the needles relative to the knitting needles back and forth twice during a knitting cycle in the transverse direction, characterized in that to generate an absolute movement of the needles along a substantially transversely to the knitting needle movement, flat, approximately elliptical path (X), a crank eccentric drive forming a part of a joint joint is provided and this drive is coordinated with the other knitting tool drives in such a way that the elliptical path is traversed in such a way that at the beginning of the deliberation movement between the Knitting needles, which carry out the last part of their absolute upward movement, and the perforated needles, which carry out the last part of their absolute horizontal movement and move upwards at one end of the elliptical path, no substantial vertical relative movement takes place and ge At the end of the deliberation movement, the knitting needles and perforating needles pass through the reversal points of their movement paths and a vertical relative movement takes place before the actual knitting needle withdrawal movement. 2. Machine according to claim 1, characterized in that the needle bar (17, 18, 19) are attached with the perforated needles at one end of arms (20) that are attached to their other End through the crank eccentric (26) i-shaped moved and between its two ends to a pivotable about a fixed bearing (23) Handlebar (22) is pivoted rotatably. Publications considered: German Patent No. 681181, British Patent Nos. 524969, 638 421. For this purpose 2 sheets of drawings 409 510/58 2.64 © Bundesdruckerei Berlin