EP2196568B1 - Cam element and knitting machine - Google Patents

Description

The invention relates to a lock part for a knitting machine and a knitting machine with slide needles.

Knitting machines are often equipped with latch needles, which have a freely swinging tongue in the vicinity of the hook. The movement of the tongue is e.g. from the movement of the needle and the effect of the thread on the tongue.

In addition, slide needles are known in which a slider is provided for the controlled closing of the hook instead of the tongue. This slider is slid longitudinally of the needle body toward and away from the hook to close or release the hook interior. The movement of the slider, like the movement of the needle, is controlled by guideways in so-called locks. The shape, in particular the slope of the guide surfaces of the guideways, in conjunction with the needle / lock relative movement causes the longitudinal displacement of the needle body and the slider. These movements are controlled by appropriate design of the guide curves in the lock or locks, wherein a guide curve with one foot of the needle body and another guide curve is in contact with a foot of a slider.

When knitting clad goods, the needles must catch a basic thread and additionally another thread and entangle. For example, the basic thread of cotton and the other thread of an elastic material such as elastane. In this case, it must be ensured that both threads taken up by the hook are securely locked into the hook interior in good time and can no longer escape from it.

This suggests the DE 41 15 198 A1 a special design of the hook interior facing surface of the slider before.

From the US-A-5,182,927 is known a knitting lock, which has adjustable elements. The adjustable element can be positioned on an inclined track to adjust the stitch forming plane.

In the production of needles is not always foresee for which yarns and materials, the needle is really used at the site. It is an effort to be able to release the slider needles as much as possible for a wide variety of different yarn qualities or to ensure that the knitting process is possible even with slider needles, even under difficult conditions, i. For example, in the production of clad goods safely proceeds.

On this basis, it is an object of the invention to provide a way to improve the use of needles in knitting machines.

This object is achieved with the lock part according to claim 1 and alternatively with the knitting machine according to claim 7.

The lock part according to the invention serves to control a foot of a slider needle. The foot is preferably the slider foot. This controls the movement of the slider. Alternatively, the foot may be the needle butt which controls the movement of the needle. The lock part according to the invention has an adjustment fastening means or is connected to an adjustment means which permits an adjustment of the position of the lock part in an adjustment direction. The adjustment is oriented transversely to the needle longitudinal direction and thus also transversely to the slider longitudinal direction. This transverse direction preferably coincides with the direction of the relative movement between the needle lock and the needle bed.

Preferably, the lock of the knitting machine comprises a lock member for controlling the slider and another lock member for controlling the movement of the needle. Because at least one of the two cam parts is provided with a Verstellbefestigungsmittel, they can be adjusted in relation to each other in the above-described adjustment. As a result, the timing for closing the slider can be adjusted exactly. It can be adjusted according to different thread qualities, thread sizes, knitting situations, settings and working speeds.

The lock part comprises a base body with at least one guideway (preferably only a guideway for the foot of the slider or the needle). The guideway may include rounded, straight, curved, ascending or descending sections. These terms refer to the direction of relative movement between the knitting lock and the needle bed. Preferably, a lock part at least a rising and a descending portion to control a reciprocation of the needle or the slider. Preferably, the guideway of a lock part comprises only a reciprocating movement of the slider or the needle.

For adjusting the lock part in the adjustment direction, the fastening means can be formed by a slot extending in the adjustment direction. A bolt passing through the slot can clamp the lock part to a carrier. If the screw is loosened slightly, the lock part can be moved in and against adjustment. In this embodiment, it may be desirable to have the lock part at one end with a recess, e.g. is bounded by two mutually opposite converging surfaces, and to provide at another end with a projection which fits with play in such a recess. In this context, "ends" are understood to mean the end surfaces of the lock part facing in and against the adjustment direction. By means of said measure, adjacent lock parts engage in one another, so that the needle feet encounter a substantially smooth transition in the transition from lock part to lock part, independently of the adjustment of a single lock part. This adjustment affects the distance between adjacent lock parts.

It is also possible and expedient in particular for circular knitting machines to arrange the lock parts provided for adjustment on a common support which is rotatably arranged, for example, with respect to a rotation axis defined by the needle bed. The needle bed may be a knitting cylinder or a dial which surrounds the Rotary axis are driven to rotate. An adjustment of the slide lock relative to the needle lock is done by a slight rotational adjustment about the axis of rotation. This will change the timing between the expulsion and retraction of the slider and the needle body. The arrangement of the slide lock on a common for all lock parts annular support allows easy adjustment of all carried by the carrier lock parts by appropriate positioning of the carrier. The needle lock and the slide lock are arranged stationary in this case during operation of the knitting machine.

The knitting machine may alternatively be designed as a flat knitting machine. In this case, the needle bed is not curved about an axis of rotation, but straight formed and arranged stationary. The path of the here movably mounted knitting lock is a linear course. The knitting lock is moved back and forth across the slider needles to sequentially expel and retract the slider needles while also controlling their slides. The needle lock contains an adjustable lock part for the knitting needles and / or an adjustable lock part for the slides. The relative displacement of a lock part with respect to the other with respect to the direction of movement of the lock, ie transversely to the needles changes, as explained above, in particular the time of closing the slide needles, so that their movement pattern can be optimized. The adjustment can be oriented at right angles or at an acute angle to the needle longitudinal directions. Slide needles pass through the guideways of the locks of flat knitting machines in alternating directions. Therefore, the lock adjustment in To adjust the dependence of the direction of the carriage during the knitting process.

Further details of advantageous embodiments of the invention will become apparent from the drawings, the description or claims. The description is limited to essential aspects of the invention and other circumstances. The drawing is to be used as a supplement. It reveals more details.

• Figur 1 eine Rundstrickmaschine, in schematisierter Darstellung,
• Figur 2 das Nadelbett und Schloss einer Flachstrickmaschine, in schematisierter perspektivischer Darstellung,
• Figur 3 die Rundstrickmaschine nach Figur 1 in ausschnittsweiser vertikaler geschnittener Prinzipdarstellung,
• Figur 4 eine Schiebernadel, in Prinzipdarstellung,
• Figur 5 das Schloss für die Schiebernadel nach Figur 4, in einer Prinzipansicht,
• Figur 6 eine ausschnittsweise Draufsicht auf eine Schieberschlossverstelleinrichtung,
• Figur 7 ein Schieberschloss in einer ersten Einstellposition, in Prinzipdarstellung,
• Figur 8 das Schieberschloss nach Figur 7, in einer zweiten Einstellposition und in Prinzipdarstellung und
• Figur 9 ein Schlossteil des Schieberschlosses nach Figur 7 und 8, in perspektivischer Prinzipdarstellung.

Show it:

• FIG. 1 a circular knitting machine, in a schematic representation,
• FIG. 2 the needle bed and lock of a flat knitting machine, in a schematic perspective view,
• FIG. 3 the circular knitting machine after FIG. 1 in a sectional vertical cut schematic diagram,
• FIG. 4 a needle, in schematic representation,
• FIG. 5 the lock for the needle after FIG. 4 in a schematic view,
• FIG. 6 a fragmentary plan view of a slide lock adjustment,
• FIG. 7 a slide lock in a first setting position, in schematic representation,
• FIG. 8 the slide lock after FIG. 7 , in a second setting position and in schematic representation and
• FIG. 9 a lock part of the slide lock according to Figure 7 and 8, in a perspective schematic representation.

In FIG. 1 is a circular knitting machine 1 illustrated, which has a rotatably mounted about a vertical axis of rotation 2 knitting cylinder 3. This is surrounded by an only schematically illustrated knitting lock 4, which is also arranged concentrically to the axis of rotation 2. The knitting cylinder 3 forms an annular needle bed with parallel needle channels. A frame 5 held on the machine carries yarn packages 6 and yarn feeding devices 7 which serve to guide yarns to slide needles which are seated in the needle channels of the knitting cylinder 3. The not further illustrated needle channels are arranged vertically on the outer periphery of the knitting cylinder 3 parallel to the rotation axis 2.

In contrast, the needle bed of a flat knitting machine is linearly stretched. Fig. 2 1 illustrates such a flat knitting machine with the aid of the schematic illustration of a straight needle bed 8 and a movable knitting lock 9. The knitting lock 9 is moved back and forth in the direction of the arrow 10 in the direction of the arrow 10 transversely to the slider needles 11. In the circular knitting machine 1 after FIG. 1 On the other hand, the knitting lock 4 rests while the knitting cylinder 3 rotates about the rotation axis 2, as indicated by an arrow 12.

The slider needles 11 are in both the circular knitting machine 1 FIG. 1 as well as in the flat knitting machine FIG. 2 in each case a base body 13, which is provided at one end with a hook 14. In or on the base body 13, a slider 15 is slidably mounted in the needle longitudinal direction, wherein the hook 14 facing the end 16 of the slide for on-demand closing or opening of the hook 14 defined hook interior is used. For this purpose, the slider 15 can be moved toward the hook 14 and away from it, wherein the end 16 in the closed position covers the tip of the hook 14 and in the release position is remote from the tip of the hook 14 and optionally retracted into an interior of the body 13 ,

In order to effect the longitudinal movement of the main body 13 and the slider 15, the main body is provided with a butt 17 and the slider with a slider 18 foot. If the main body 13 and the slider 15, as it is preferably the case, are formed as flat sheet metal parts, the needle butt 17 and the slider foot 18 are projections which protrude beyond the needle top and the slide top. The butt 17 and the slider 18 run in guideways of the knitting lock 4 or 9, the in FIG. 5 schematically in its view radially outward, that is, viewed in the direction of its tracks 20, 21 is reproduced. The knitting lock 4 and / or 9 comprises a slider lock 26 and a needle lock 31.

In a circular knitting machine, each guideway 20, 21 preferably extends over a plurality of lock parts, which together form the knitting lock 4. The guide track 20 for the slide foot 18 extends in the main body 67 is formed by a plurality of lock parts 22, 23, 24, 25, and other lock parts, not shown, which in the case of the circular knitting machine 1 to a closed, extending around the knitting cylinder 3 around ring complement and is formed by these lock parts. This lock part 22 to 25 (and the other not illustrated lock parts of said ring) form the slide lock 26th

The guide track 21 for the needle foot 17 extends in the main body 66 of the cam parts 27, 28, 29, 30 (and other lock parts not illustrated), which in the case of the circular knitting machine 1 with the lock parts shown 27 to 30 to a knitting cylinder 3 surrounding and extend to this concentric ring and together form the needle lock 31.

In the case of the flat knitting machine, the knitting lock 9 consists only of one lock part 22 (slide lock part) and 27 (needle lock part) or possibly a few straight rows of lock parts 22, 23, 24; 27, 28, 29, which have the guideways 20, 21.

In FIG. 5 an arrow 32 illustrates the relative movement between the slider needles 11 and the knitting cam 4. By the rotation of the knitting cylinder 3, the feet of the needle 11 slide in the direction of the arrow 32 in the guideways 20, 21 along. They follow both the straight track sections 33 as well as rising sections 34, as well as descending sections 35.

At the circular knitting machine FIG. 1 is the knitting cylinder 3, as in particular also from FIG. 3 emerges surrounded by the knitting lock 4. The knitting lock 4 rests on an annular support 36, on which the lock parts 27 to 30 of the needle lock 31 are arranged directly or by means of an intermediate carrier 37.

The support 36 may have distributed over its circumference a plurality of supports 38 which support, for example, an annular concentrically arranged to the knitting cylinder 3 further support 68 on which the slide lock 26 is arranged via fastening means. In this case, the carrier 68 may be formed in two parts and consist of two rings 39, 40, which are mutually adjustable in rotation. The ring 39 is supported by the support 38 and is thus rigidly connected to the needle lock 31. The ring 40 is at least slightly rotatable against the ring 39 and can be locked in different rotational positions. For explanation will be on FIG. 6 directed. As can be seen, the concentric nested rings 39, 40 can be connected to each other via fastening means, for example in the form of a regulating apparatus 41, which secures the rings 39, 40 against each other. For this purpose, the ring 40 may be provided with a projection 42, which rises from its upper flat side. The ring 39 may be provided with two threaded blocks 43, 44, the mutually aligned bolts 45, 46 lock the projection 42 between each other. An adjustment of the bolts 45, 46 allows a sensitive rotation of the rings 39, 40 against each other for Justierzwecken.

The ring 40 wears, as FIG. 3 shows the slide lock 26, for example by means of individual holder or carrier 47th

The support 38 may also support a generally annular blanket lock 48 which serves to control movement of the containment and knock-down plate 49. These are arranged radially to the axis of rotation 2 of the circular knitting machine 1 in a sinker ring 50 which has radial slots for receiving the Einschließ- and teeing plates 49 and on the upper End of the knitting cylinder 3 is arranged rotatably connected thereto.

The circular knitting machine 1 described so far operates as follows:

In operation, the knitting cylinder 3 rotates about the axis of rotation 2. The slide needles 11 are thereby moved according to the illustrated in Figure 5 guideways 20, 21 of the slide lock 26 and the needle lock 31. As can be seen, the guideways 20, 21 differ slightly from each other. For example, the needle body 13 is further expelled by the increase 34 of the lock member 30 as the slider 15 through the rise 34 of the lock member 25. The lock member 25 and 30 forms a pair of lock parts, which is passed through by the slider needle at the same time. As a result, the hook interior of the slider needle 11 is opened while it is expelled. The straight and descending guide track sections 33, 35 of the two cam parts 25 and 30 then cause the closing of the hook interior and the retraction of the needle 11. The situation is similar with the other cam pairs 24, 29 and 23, 28 and 22, 27.

In order to accurately adjust the timing of closing and opening the hook interior of the hook 14 and retracting the slider needles 11, it may be desirable to adjust the slider lock 26 and the needle lock 31 with respect to each other, which is shown in FIG FIG. 5 is illustrated by the arrow 51. The adjustment can be effected by adjusting the adjusting bolts 45, 46.

It may also be expedient not to adjust the needle lock 31 and the slide lock 26 in each case as a whole, but only in relation to individual lock parts 22, 23, 24. This is illustrated by the FIGS. 7 and 8 , There, the lock parts 22 and 24 are shown unchanged in their setting positions, while the intermediate lock part 23 in FIG. 7 to the right and in FIG. 8 is moved to the left. For fixing the lock parts 22 to 24 on a suitable support, such as the holder 47, the lock parts 22 to 24 fastening means in the form of slots 52, 53, 54 on. These are penetrated by a bolt, by means of which the respective lock part can be locked 22 to 24. After loosening the bolt, each of the lock parts can be adjusted 22 to 24 in the direction of arrow 51. The direction of the arrow 51 corresponds to the direction of the arrow 32, that is to say the direction of the relative movement between the slider needles 11 and the knitting lock 4.

If the individual lock parts 22 to 24 (as well as other subsequent in the FIGS. 7 and 8 not illustrated lock parts) with respect to each other, it is expedient, the lock parts, as described below with reference to FIG. 9 and exemplified at the lock part 22 form.

The lock member 22 has at the end 55, on which the needles arrive in operation, a preferably funnel-shaped recess 56 with two mutually running surfaces which lead to the guide track 21. As a result, the guide track 21 widens in a funnel-like manner at the end. At the opposite other end 57, the lock member 22 may be provided with a beak-like projection 58 which fits into the recess 56 of a similar trained lock part with game fits. Thus, regardless of the setting position of the lock part 22 or 23 according to FIG. 7 or FIG. 8 in each case a smooth, relatively low-impact transition of the slide foot 18 from one lock part to another is ensured.

With the individual adjustability of the individual lock parts, the timing (i.e., the timing fine tuning) of the closing movement of the slider and the return movement of the needle body to each knitting point can be individually adjusted on a circular knitting machine 1. Accordingly, the timing can be adjusted by adjusting a lock part on a flat knitting machine.

The inventive concept of the relative adjustment of at least one lock part of the slide lock 26 with respect to at least one lock part of the needle lock 31 can be applied to the flat knitting machine FIG. 2 realize. In the existing there knitting lock 9 two guideways for the slide feet 18 and the needle feet 17 are provided. At least one of the guideways 20, 21 is realized by an adjustable lock part, the adjustment direction coinciding with the direction of movement 10 of the knitting lock 9. Thus, the timing of closing the slide needles in a flat knitting machine can be set advantageously.

In a circular or flat knitting machine, a needle lock is provided which permits an adjustment of at least one lock part 22 with respect to at least one other lock part 23. This allows the time course of the closing and opening of the hook interior of the needle adjust to the time course of the retraction of the needle and adjust as needed. This measure can be used to increase the knitting quality and reliability of a fitted with needle needles knitting machine.

reference numeral

1

Circular knitting machine

2

axis of rotation

3

Knitting cylinder / needle bed

4

knitting lock

5

frame

6

bobbins

7

Yarn feeding devices

8th

needle bed

9

knitting lock

10

movement direction

11

needle

12

arrow

13

body

14

hook

15

pusher

16

The End

17

butt

18

slider

20

Guideway for the slider foot 18

21

Guideway for the butt 17

22-25

cams

26

slider cam

27-30

cams

31

lifting cam

32

arrow

33

straight guideway sections

34

rising guideway sections

35

descending guideway sections

36

carrier

37

subcarrier

38

support

39, 40

rings

41

parking apparatus

42

head Start

43, 44

thread blocks

45, 46

Adjustment Bolts

47

holder

48

platinum Palace

49

Containment and debit boards

50

platinum ring

51

arrow

52,53,54

slots

55

The End

56

recess

57

The End

58

head Start

66, 67

Basic body of 27, 22 etc.

68

carrier

Claims (15)

1. Cam (22) for a knitting machine (1)
   with a base body (67), which is provided with a guide path (20) for a butt (18) of a compound needle (11)
   with a fastening element (41, 52) for fastening the base body to a support (68, 47), characterised in that
   the fastening element (41, 52) is an adjusting fastening element fitted to adjust the position of the cam (22) in an adjusting direction (51), which is oriented transversely to the longitudinal direction of the needle and thus also transversely to the longitudinal direction of the slider.
2. Cam according to claim 1, characterised in that the guide path (20) is configured directly on the base body (67).
3. Cam according to claim 1, characterised in that the guide path (20) has at least one section (34, 35) inclined relative to the adjusting direction.
4. Cam according to claim 1, characterised in that the adjusting direction (51) is consistent with a direction of relative movement (10, 32) between the cam (22) and a needle bed (3, 8), in which compound needles (11) are disposed, the sliders (15) of which are controlled by the cam (22).
5. Cam according to claim 1, characterised in that the fastening element (41, 52) is formed by an elongated hole (52) extending in the adjusting direction (51) or an adjusting mechanism (41).
6. Cam according to claim 1, characterised in that the cam (22) has a recess (56) at one end (55), at which the guide path (20) begins, and a projection (58) at another end (57), at which the guide path (20) ends.
7. Knitting machine (1),
   with a needle bed (3, 8) for receiving compound needles (11),
   with a cam assembly (4, 9), which has a needle guide path (21) for butts (17) of the compound needles (11) and a slider guide path (20) for butts (18) of the sliders (15) of the compound needles (11),
   wherein the cam assembly (4, 9) and the needle bed (3, 8) are movable relative to one another in a drive direction (32, 51) in order to move the compound needles (11) and their sliders (15) as part of a knitting process,
   characterised in that the knitting machine (1) has an adjusting means (41, 52) for adjusting at least one section of the slider guide path (20) relative to the needle guide path (21) in the drive direction (32, 10).
8. Knitting machine according to claim 7, characterised in that the section of the guide path (20) is formed by a cam (22) according to claim 1.
9. Knitting machine according to claim 8, characterised in that the cam assembly (4, 9) comprises multiple cams (22, 27 or 23, 28), which are adjustable relative to one another in the drive direction (32, 10).
10. Knitting machine according to claim 7, characterised in that the needle bed (3) is driven to rotate around a rotational axis (2).
11. Knitting machine according to claim 10, characterised in that the cam assembly (4,) comprises a needle cam (31) and a slider cam (26).
12. Knitting machine according to claim 11, characterised in that the slider cam (26) is adjustably held against the needle cam (31) in or contrary to the direction of rotation (32).
13. Knitting machine according to claim 11, characterised in that the slider cam (26) is composed of a number of cams (22, 23, 24, 25) arranged next to one another in a row and adjustably spaced from one another.
14. Knitting machine according to claim 9, characterised in that the slider cam (26) is composed of a number of cams (22, 23, 24, 25) arranged in a row and the spacing of said cams from one another is adjustable.
15. Knitting machine according to claim 7, characterised in that the needle bed (3, 8) is fixedly arranged.

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