JPS6047948B2 - Needle control and selection device for knitting machines, especially flat knitting machines - Google Patents

Description

Detailed Description of the Invention The present invention includes a cam, an electromagnetic selection mechanism that can be excited depending on the handle, a needle supported movably in the longitudinal direction on the needle bed, and a cam attached to the needle that moves in the longitudinal direction. A knitting machine, particularly a flat knitting machine, having a needle pusher piece supported movably and swingably, the needle pusher piece being able to come into contact with an electromagnetic selection mechanism by means of a pressing cam against the force of a return spring. This invention relates to a needle control and selection device for use in a computer.

Devices of this type are known, for example, from German Patent Application No. 1 635 900 and German Patent Application No. 21
53428 or German Patent Application No. 1952827. Ru.

SUMMARY OF THE INVENTION The object of the invention is to design a needle control and selection device for an electrically controlled knitting machine as simply as possible without compromising the reliability of its operation.

This problem is solved according to the invention in a needle control and selection device of the type mentioned at the beginning.

That is, the selection range of the cam device is provided with two symmetrical selection cams that are arranged offset from each other at right angles to the running direction of the knitting machine and can be adjusted in opposite directions, and these selection cams are arranged on the cam surface. The needle pushing piece has a rising surface that acts perpendicular to the cam surface and a pushing surface that acts within the cam surface, and the needle pushing piece has a compound selection and pushing pad, and the electromagnetic selection mechanism Acts from below or behind the end of the needle pusher protruding from the edge. In the needle control and selection device constructed according to the invention, therefore, an electromagnetic selection mechanism, preferably a known permanent magnet with a recovery coil, acts on the end of the needle pusher protruding from the edge of the needle bed.

In this range, the formation of leakage flux is less than if an electromagnetic selection mechanism is provided in the area of the knitting machine needle bed, which facilitates precise selection of the individual needles. 9. The manufacture of the cam is advantageous due to the use of a composite selection cam which can be used both as a push cam and as a push cam.

The symmetrical selection cams used in pairs work together so that, for flat knitting machines, the selection cam that is in front in the carriage running direction in each case acts as a pressure cam 7 and the following selection cam acts as a selected needle pusher. Extrude the piece. During reverse movement of the carriage, the functions of the two selection cams are interchanged. At each reversal of the carriage stroke, both selection cams are adjusted in opposite directions. In the device constructed according to the invention, at the selection point, after a very short restoring stroke assisted by the return spring, the needle pusher engages the push-out surface of the selection cam. In this case, the push-out surfaces of the selection cams, which can be adjusted in opposite directions as a pair, extend obliquely toward the cam mounting plate so as to form a notch, so that when the edge of the push-piece pad runs onto the push-out surface, , the similarly inclined extrusion edge of the pusher pad of the needle pusher is completely retracted into the pusher pad track. This facilitates rapid selection and increases reliability of operation. The device constructed according to the invention furthermore allows adjustment of the oppositely adjustable selection cams at any time and readjustment if necessary, and for this purpose the cam mounting plate of the carriage can be adjusted at will. It has the advantage that it does not need to be removed.

In other words, the cam mounting plate has a peephole in the area where two selection cams that can be adjusted in opposite directions are adjacent to each other, and through this hole, the selection location and the immediately following protrusion on the extrusion surface of the selection cam pair are cam mounted. You can make it visible from the back of the board. Of all the selective cam pairs of the cam mounting plate, one in each case must be provided between successive knitting systems, but the adjustment of all these selective cam pairs in mutually opposite directions is, according to the invention, carried out by the carriage. This can be done by a common switching rod which is movable in the direction of travel and is equipped with a switching cam. The switching rod and the switching cam are preferably provided on the back side of the cam mounting plate and cooperate with a switching member fixedly connected to the cam on the front side of the cam mounting plate and having an engagement recess. The movement of the switching rod at the point of carriage reversal can be effected by applying a mechanical force to the end of the switching rod or by means of an electrical actuation mechanism provided on the carriage together with other electromechanical actuation mechanisms. . The pair of switching cams on the back side of the cam mounting plate are configured so that only one of them makes the adjustment. Embodiments of the invention will now be described with reference to the accompanying drawings.

The cross-sectional views in FIGS. 1 and 2 show an outer edge portion of a needle bed 10 of a flat knitting machine.

This sectional view extends through the needle groove 11, into which the needle 12 and needle pusher 13 shown in FIG. 3 are inserted. Of the carriage that can move longitudinally on the needle bed 11 in a known manner, only the cam mounting plate 14 is shown, and a magnet and a holder 16 are attached to the outer edge of the cam mounting plate 14.
A retaining curved piece 15 for attachment is screwed. Only one magnet holder 16 with selection magnet 17 is shown here. The selection magnet 17 is a permanent magnet having a restoration coil that can be excited depending on the handle, and its magnetic pole protrudes from the bottom surface of the needle groove 11 in the immediate vicinity of the outer edge 18 of the needle bed 10. The switching rod, switching cam and switching member shown in FIG. 5 are not shown in FIGS. 1 and 2 for clarity. The needle pushing piece 13 is constructed as a swinging pushing piece and is preloaded by a spring 19 supported on the bottom of the needle groove 11.

The needle pushing piece 13 has a return pad 20 at its inner end,
A composite selection/extrusion pad 21 is provided in the intermediate range, and an end portion 22 projecting from the outer edge of the needle bed 10 forms an armature of the selection magnet 17. The compound selection/extrusion pad 21 of the needle pushing piece 13 cooperates with a pair of selection cams 23a and 23b. These cams 23a and 2
3b further describes FIGS. 3 and 4. FIG. 1 shows the needle pushing piece 13 just before needle selection, and since the needle pushing piece 13 is pushed into the needle groove 11 by the selection cam 23 against the force of the spring 19, its contact pole child 2
2 is in contact with the selection magnet 17. FIG. 2 shows the needle pushing piece 13 immediately after being selected, its armature 22 is repelled from the selection magnet 17 by the excitation of the selection magnet 17, and its composite selection/extrusion pad 21 is on the extrusion surface of the selection cam 23. It has reached 24 areas of influence.

3 and 4 show part of the cam device of the knitting machine.

Here, only the outer selection range A is relevant. Similarly, among the selection magnets 17 attached to the carriage,
Only two are shown in dashed lines. These magnets are each aligned at a transition point between two selection cams 23 arranged side by side in pairs, which cams are shown in FIGS. 3 and 4.
In the figure, they are designated as 23a and 23b for distinction. Both selection cams 23a and 23b of the selection cam pair are constructed symmetrically, with a running surface 25 acting perpendicularly to the needle bed surface and the cam mounting plate 14, and a pushing surface acting in the needle pushing direction within the cam surface. It has 24. The run-up surface 25 and its function can be seen from FIG. 1, and the extrusion surface 24 and its function can be seen from FIG. From FIG. 2, the extrusion surface 24
extends obliquely toward the cam mounting plate 14 so as to form a notch, and the composite selection/extrusion pad 21 of the needle pusher piece 13
It can be seen that the extruded edge also has an extruded edge that extends at an angle in the same way. Due to this inclination, the selection magnet 11
After the needle pushing piece 13 is restored by
Once the range of influence is reached, it is possible to cause this pad 21 to be pulled towards the cam mounting plate 14 towards the selection cam 23. In FIG. 3, where the selection cam has been switched in the direction of arrow 26 because the needle and needle pusher pass through the cam track, the subsequent selection cam is selection cam 23b.
Among the cams switched in the running direction 27 according to FIG. 4, the subsequent selection cam is selection cam 523a. 3 and 4, it can be seen that for both selection cams 23a and 23b of each selection cam pair, a guide slit 28 extends at right angles to the longitudinal movement of the carriage, as indicated by arrows 38, 39.

In the direction of these O slits 28, both selection cams 23a and 23b are moved from the position shown in FIG.
It is adjusted to the position shown in the figure or vice versa, depending on the direction of travel of the carriage. The adjustment device will now be described with reference to FIG. Due to the mutually shifted arrangement of both selection cams 23a and 23b and the replacement of the shifted state of both selection cams every time the carriage is reversed, the carriage travels in each case in the range of the selection point indicated by the selection magnet 17. The rising surface 25 of the previous selection cam (selection cam 23a in FIG. 3) acts in the direction, and the push-out surface 24 of the subsequent selection cam 23b in the carriage traveling direction acts on the recovered needle pusher piece 13. be able to. Due to the offset arrangement of the selection cams that follow each selection cam pair, their running surfaces 25 do not affect the padding of the needle pusher piece 13. From FIG. 3 and FIG.
3b, it can be seen that there is a peephole 29 in the cam mounting plate 14.

Through this peephole 29, the restored push piece pad 21
The protrusion position of the extrusion surface 24 of the selection cam 23 at is monitored for adjustment. FIG. 5 shows the selection cam 23a,
23b - shows the adjusting device.

Each selection cam 23a, 23b is coupled to a switching member 30a, 30b provided on the back surface of the cam mounting plate 14 through a guide slit 28 of the cam mounting plate 14. Each switching member 30a, 30b has a side stopper protrusion 31
and two engaging recesses 32. The lateral stop 31 cooperates with an adjusting eccentric 33 so that the switching element 30 and the corresponding selection cam 2
3 end positions are set. In FIG. 5, the switching member 30
To this end position 3, in which it is located b, the switching element 30 is pressed by a spring 40 shown in FIG. The spring 40 is provided in the slit 28 in this case. The switching member 30a and the other end positions are either a switching cam 34 or 35. In its illustrated switching position, the switching cam 34 fits into the engagement recess 32 of the switching member 30a. As can be seen from the foregoing description, the position of the needle pushing piece 13 shown in FIG. .

If the selection magnet 17 is not energized, the needle pushing piece 13 remains in this position until the selection and ejection pan 21 passes the protrusion of the ejection surface 24 of the selection cam following the selection cam pair 23a, 23b. The needles 12 then remain in the non-knitting position.
On the other hand, when the selection magnet 17 is excited at the selection point, the needle pushing piece 13 is restored from the selection position shown in FIG.
, 23b by the extrusion surface 24 of the subsequent selection cam. The corresponding needle 12 is then moved to the knitting position or to the tank position or to the loop transfer device, depending on how the other cams of the system which are not relevant here are switched.

[Brief explanation of drawings]

1 is a sectional view of the outer edge area of the needle bed of a flat knitting machine and the corresponding part of the cam mounting plate of the carriage; FIG. 2 is a sectional view of the knitting machine of FIG. 1 in different positions of the cam mounting plate; The figure is a front view of the cam corresponding to the cam mounting plate system, also showing the needle and needle pusher, Figure 4 is a front view of the cam in the carriage running direction opposite to that in Figure 3, and Figure 5 is the selected one. FIG. 3 is a front view of the back side of the cam mounting plate with the cam control device. 10... Needle bed, 12... Needle, 13... Needle pusher piece,
14...Cam mounting plate, 17...Selection magnet, 18.
...Outer vertical edge, 19...Spring, 21...Combined selection and extrusion pad, 22...Needle pusher end, 23a, 23
b... Selection cam, 24... Extrusion surface, 25... Riding surface.

Claims (1)

[Claims] 1. A cam, an electromagnetic selection mechanism that can be excited according to the handle, a needle that is supported movably in the length direction on the needle bed, and a cam that is attached to the needle and that is movable in the length direction. In a knitting machine having a swingably supported needle pusher piece, the needle pusher piece can come into contact with an electromagnetic selection mechanism by a push cam against the force of a return spring, in the selection range A of the cam device. two parts arranged offset from each other at right angles to the running direction of the knitting machine and adjustable in opposite directions;
Two symmetrical selection cams 23a, 23b are provided, and these selection cams act perpendicularly to the cam surface 2.
5 and the extrusion surface 24 acting within the cam surface are connected to the needle pusher piece 13
The needle pushing piece 13 serves as a composite selection and extrusion butt 2.
1, and the electromagnetic selection mechanism 17 is provided with an outer longitudinal edge 18 of the needle bed 10.
Needle control and selection device for a knitting machine, characterized in that it acts from below or from behind on the end 22 of the needle pusher piece 13 protruding from the needle. 2. The needle according to claim 1, characterized in that, in the running direction of the knitting machine, a selection cam located in front each time prepares the selection of the needle pusher piece, and a selection cam located each time behind carries out the selection. Control and selection device. 3. The electromagnetic selection mechanism 17 is connected to the movable knitting machine part (cam mounting plate 14) by at least one curved piece 15, 16 surrounding the free end 22 of the needle pusher piece 13. A needle control and selection device according to scope 1. 4 The cam mounting plates 14 are adjustable in opposite directions.
The needle control and selection device according to claim 3, characterized in that the two selection cams 23a, 23b have a peephole 29 in an adjacent range. 5 Two selection cams 23a, 2 whose selection locations form a pair
3b and between two adjacent systems, and the selection cams 23a, 23b overlap the knitting cams of these adjacent systems in the running direction of the knitting machine. The needle control and selection device according to item 1. 6 Selection cams 23a, 23 adjustable in opposite directions as a pair
The extrusion surface 24 of b extends obliquely toward the cam mounting plate 14 so as to form a notch, and the composite selection/extrusion butt 13 of the needle pushing piece 13 has an extrusion edge that also extends obliquely. A needle control and selection device according to claim 1, characterized in that the needle control and selection device comprises: 17 All selected cam pairs 23a on the cam mounting plate 14,
23b in mutually opposite directions, the knitting machine traveling direction 26, 2
The selection is carried out by a common switching rod 37 with switching cams 34, 35 which are movable to the selection cams 7 and which can fit into the engagement recesses 32 of the switching members 30a, 30b fixedly connected to these selection cams. Cams 23a, 23
b is preloaded by a spring 40,
A needle control and selection device according to claim 6. 8. According to claim 7, the switching rod 37 is provided on the back surface of the cam mounting plate 14, and is movable by an electrical or mechanical operating mechanism at a carriage reversal point in the case of a flat knitting machine. Needle control and selection device as described. 9. The needle control and selection device according to claim 1, characterized in that the position of one of the cams 23a, 23b of the pair of selection cams is determined by an adjustable eccentric wheel 33, respectively. 10 At least a portion of the selection cam pair 23a, 23b is 2
characterized in that it belongs to two adjacent systems and influences one system in the running direction of one knitting machine and the other system in the running direction of the other knitting machine. Needle control and selection device as described.