DE2259170A1 - DRIVE DEVICE FOR THE CIRCULAR NEEDLE MOVEMENT ON CHAIN WHEELING MACHINES, IN PARTICULAR RINKING MACHINES - Google Patents

Description

2259170 W.Schlaihorst & Co. ίο 065 Li / vdM.

405 Mönchengladbach Blumenberger Strasse 143/145 J .. 12. 1972

Drive device for the knitting needle movement on warp knitting machines, especially Raschel machines

The invention relates to a drive device for the knitting needle movement at warp knit, especially Raschelmaschfeien, wherein the knitting needles apart from the up and down movement a tilting movement with the pivot point at the level of the knock-off edge a fixed tee bar is granted.

The tilting movement additionally given to the knitting needles generates a so-called counter movement of the knitting needles to the Hole needles and prevents the build-up of inertia forces during the swinging movement of the guide bars, because on In this way, with an active movement equivalent to the previous active process, a shortening of the swing stroke the guide bar is made possible.

It is already known to have knitting needles so far to pivot a pivot point at the level of the knockdown edge of the fixed knockdown bar that the guide bars only need to carry out the offset movement. In this device, the pivoting movement of a

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Cam gear generated. It is also known to use the needle bar with its knitting needles and the knock-off bar on the one hand and on the other hand to drive the guide bar so that these elements run in opposite directions only anti-phase movement and thus execute the initially mentioned opposite movement. A major disadvantage of the The latter device arises from the fact that the knock-off bar is not fixed, but rather on the swinging movement the knitting needles is involved. In addition to an increase in the inertia forces, there is a risk that the The stitches hanging on the needle shafts are overstretched by several millimeters. In addition, the function of straight guides, as they are used in the known devices, at high engine speeds as a result the forces of inertia that occur are limited.

The disadvantage of the first-mentioned known device consists in the cam mechanism mentioned, which in the The high machine speeds that are sought today as a result of the unfavorable balance of forces causes considerable difficulties.

The invention is based on the object of addressing the above-described disadvantages in a drive device for the active

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nade! movement on warp knitting, especially Rasöiielma * * * machines to eliminate.

This object is achieved according to the invention in that. the drive device from one with a crank mechanism connected four-bar linkage, the rocker arm part of a double rocker arm and the coupling carrier of the Knitting needles is, the support elements of the same firmly connected to the coupling at an angle of 110 ° -X60 ° are. The use of a four-bar gear enables the highest machine speeds. Besides, this is Four-bar gear less sensitive to dust, which leads to cladding in facilities with linear guides can lead.

Runs according to a further advantageous feature of the invention a connecting line from the frame point of the rocker, which predominantly determines the tilting movement of the knitting needle, to the Head of the knitting needle approximately perpendicular to the connecting line between the two end positions of the coupling points Swing, it is achieved that the residual movement of the needle at the knock-off edge is only a few tenths of a millimeter is · This causes an overstretching of the on the liädelschänke hanging stitches avoided and a pronounced rest at the highest point of the knitting thread!

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An embodiment of the invention is shown in the drawing and is described in more detail below.

Show it:

Figure 1 is a partial side view of a drive device in section with a knitting needle in the lowest position,

Figure 2 is a side view according to Figure 1, in which the knitting needle is in its uppermost position,

Figure 3 is a movement diagram for the knitting needle and Swinging movement of the guide bars and

FIG. 4 shows a polar diagram of the knitting needle movement.

In FIG. 1, a crankshaft drive 1 can be seen which is formed by the main shaft 2 of the eccentric disk 2 ′ firmly connected to it and the connecting rod 3. The four-bar linkage consists of the rocker arms 5 and 6 with the frame points and 8 and the coupling 9 with the coupling points 10 and The rocker arm 5 is provided with a boom 5 'which connects to the crank mechanism via the bolt 12. The coupling 9 also has an arm 9 'to the support elements for the knitting needles 13 · The supporting elements are made of the permanently connected to the boom 9 ¹ Ball

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pin l4 and a screw bar 15 for the needle bar l6. With the needle bar 16 are the sockets 17 for the knitting needles 13, which are shown in the here Embodiment consist of latch needles, firmly screwed. Next to the knitting needle IJ you can see the fixed one Knockdown bar 18. Above the knockdown bar 18 are the needles 19 of two guide bars, not shown visible, and next to the tee bar 18 is located a goods take-off roller 20. With the support pin 14 and contours 21, 22 of a gear housing are still elastic Membranes 23 and 24 connected to cover against dust and fluff.

While in FIG. 1 the coupling point 10 reaches its end position which determines the final position of the knitting needle 13 has, Figure 2 shows with the coupling point 10 'the other end position of the four-bar linkage 4 with the others already mentioned parts. Here, the knitting needle 13 has its highest position and also the widest deflection, the one assumed pivot point at the height of the fixed cutting edge l8 'achieved tilting movement. In Figure 1 in turn, the end position of the coupling point 10 'reached in FIG. 2 is indicated by dash-dotted lines. It it can be clearly seen that the connecting line 25 between

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the frame point 7 and the head 13 'of the knitting needle 13 runs approximately perpendicular to the connecting line 25 'between the two end positions with the coupling points 10, 10'. Furthermore, in Figure 2 with the angle 26 is the position of the rigid connection between coupling 9 and the support elements for the knitting needles I) made clear .

FIG. 3 shows a movement diagram from the individual phases of the knitting process for the knitting needle 13 resulting movement. This consists of a movement in direction χ and a movement in direction y. The curve for the swing of the perforated needles is marked with ζ. From the movement diagram it can be seen that up to the angle of rotation α = 80, corresponding to the position of the main shaft 2, the knitting needle 13 only in the y direction is moved, that is, the knitting needle 13 is moved vertically upwards. The underlay is in the position α = 80 ° completed. The perforated needles 19 pivot in the direction of the head of the knitting needle 13. The head of the knitting needle in turn, as a result of the movement that is now beginning, moves in the direction χ towards the perforated needles 19.

FIG. 4 shows particularly clearly the entire sequence of the resulting knitting needle movement in a polar diagram.

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The drive device according to the invention enables except for the advantage already mentioned, which is that the residual movement of the knitting needle at the knock-off edge is only a few tenths of a millimeter and thus an overstretching of the stitches hanging on the needle shafts is avoided, in addition, a particularly large freedom of movement when placing within a warp knitting or Raschel machine. For example, a mirror-image arrangement or the coupling of the Swing arm 6 with the crank mechanism 1 generating the drive movement is possible. Of course, the drive device except for latch or point needles also for tubes, slides or other known needle types be used.

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Claims (2)

W.Schlafhorst & Co. ίο o65 Mönchengladbach £ Blum «nbw« «r SiraB« 143 / 14S 1. 12, 1972 Patent claims: 1. Drive device for knitting needle movement on warp knitting, In particular, Raschel machines, the knitting needles having a tilting movement in addition to the up and down movement with the pivot point at the level of the knockdown edge of a stationary knockdown bar, characterized in that that the drive device consists of a four-bar gear (4) connected to a crank mechanism (l) consists, whose rocker (5) is part of a double rocker and whose coupling (9) is the carrier of the knitting needles (13), the support elements of the same are firmly connected to the coupling (9) at an angle (26) of 110 ° - 160 °. 2. Drive device according to claim I, characterized in that that a connecting line (25) from the frame point (7) which is predominantly the tilting movement of the knitting needle (13) determining rocker (5) to the head (13 ') of the knitting needle approximately perpendicular to the connecting line (25 *) runs between the two end positions of the coupling points (10, 10 ') of the rocker arm (5). 409823/0631