EP3418434B1 - Machine knitting tool, in particular machine knitting needle - Google Patents

Description

The invention relates to a machine knitting tool and in particular a machine knitting needle. The machine knitting tool is preferably adapted to be used in knitting staple fiber yarns such as cotton yarns. The machine knitting tool or the machine knitting needle is preferably a latch needle or a slider needle.

A variety of machine knitting tools and machine knitting needles are known. Machine knitting needles, for example, in particular latch needles, are moved in the longitudinal direction during knitting with a knitting machine in a guide or needle channel. For this purpose, each machine knitting needle has a drive section with a foot part. The foot cooperates with a lock of the knitting machine to longitudinally position the machine knitting needle in a needle channel. In circular knitting machines, the knitting cylinder with the machine knitting needles is rotated relative to the lock in a circumferential direction, and the foot parts of the machine knitting needles are guided in a lock track. Not only does a force act on the foot parts in the longitudinal direction of the machine knitting needle, but also transversely thereto in a transverse direction. Other machine knitting tools such as sinkers or slides of slide needles are moved or positioned during knitting in a knitting machine by means of a suitable drive device.

Such machine knitting tools must satisfy a variety of partly competing conditions. To achieve the highest possible productivity, high speeds of movement are required, for example, a high rotational speed of a knitting cylinder of a circular knitting machine, which leads to correspondingly high accelerations and speeds of the machine knitting needle and other machine knitting tools of the knitting machine.

On the one hand, a small mass of the machine-knitting tool is advantageous for enabling high accelerations. On the other hand, machine knitting tools must have a long service life and no excessive signs of wear or damage may occur due to the introduction of the acceleration forces. The replacement of a defective machine-knitting tool requires the standstill of the knitting machine and leads to a loss of productivity. The machine knitting tool must be able to be positioned accurately so as not to cause any stitching errors. The accuracy of the guidance or positioning of the machine-knitting tool in the stitch-forming process must not be affected by yarn residues, fiber residues or other impurities.

In order to take these various boundary conditions into account, very different designs of machine knitting tools have already been proposed. In order to avoid the risk of needle breaks, machine knitting needles are also known in which the shank has meandering sections, such as for example US 5,231,855 or. DE 69 218 303 T2 is known. This is intended to better absorb the influence of jerky accelerations on the machine knitting needle and to avoid the risk of damage. The needles described there form a group, the needles of one group each having a foot portion sitting at a different foot position compared to the foot portions of the other machine knitting needles of the same group. Where one of the needles has a foot part, the other needles each have a shaft bridge.

A machine knitting needle with a meandering shank portion is also in DE 28 20 925 A1 described. There should be arranged at a distance from the bottom web section a web height of max. 1.1 mm or or 0.9 mm.

US 4,036,036 A proposes, instead of meandering sections of a machine knitting needle, to provide openings between the two side surfaces of the shaft, which may have different shapes and forms. This is to avoid depressions or recesses on the underside and the top of the needle in comparison to the meander-shaped shaft sections.

DE 3 014 751 A1 describes, for example, a stamped machine knitting tool in the form of a latch needle. The shank has a plurality of apertures, which completely penetrate the shank in the transverse direction and open out on in each case one side face of the shank. As a result, annular closed chambers are formed. These are bounded by two longitudinally extending parallel to each other webs. As a result, jerky accelerations are better absorbed and needle breaks are avoided.

Out CN 2 178 245 Y is a machine knitting needle with the features of the preamble of claim 1 is known.

Starting from the prior art, it is an object of the present invention to provide a knitting tool which satisfies the boundary conditions described above sufficiently and allows high acceleration with precise guidance.

This object is achieved by a machine knitting tool having the features of claim 1.

According to the invention, a machine-knitting tool and in particular a machine-knitting needle with a shaft extending in the longitudinal direction is proposed. The shaft of the machine-knitting tool has an underside, an upper side opposite the underside, and two side surfaces connecting the underside and the upper side. The side surfaces are spaced apart in a transverse direction at right angles to the longitudinal direction. The two side surfaces are preferably aligned parallel to each other.

The shank or machine knitting tool has a front end and an opposite rear end. The front end is immediately followed by a stitch forming section. In the embodiment of the machine knitting tool as a machine knitting needle, a needle hook is provided in the stitch forming section. If the machine knitting needle is designed as a latch needle, a movably mounted tongue can be present in the stitch formation section, which can be moved between an open position and a closed position.

At the rear end immediately follows a drive section of the machine knitting tool. In the drive section, the machine-knitting tool has at least one foot part. The foot part extends in a height direction at right angles to the longitudinal direction and at right angles to the transverse direction and has, starting from the bottom, a foot part height. The foot part is adapted to interact with a lock of the knitting machine in the stitch forming process. By means of the foot part, the machine knitting tool can be moved and / or positioned.

When the description refers to a height of the shaft or of certain parts of the shaft, the height information is always given in relation to the underside.

The underside of the machine-knitting tool extends at least outside the stitch-forming section in a single plane which is spanned by the longitudinal direction and the transverse direction. The underside is free of elevations or depressions or openings in relation to this plane.

Preferably, the side surfaces are at least in the drive section without recesses or depressions. Thus, neither in a recess or recess on the bottom, nor in a depression or recess on the side surfaces dirt accumulate. The accumulation of dirt can lead to impairments in the positioning accuracy of the machine knitting needle. If too much dirt accumulates in a recess, the friction may also be caused by a movement of the machine knitting tool increase and cause increased wear. The machine-knitting tool is particularly adapted to be used in knitting a staple yarn or cotton yarn. With such yarns, a particularly high level of contamination in the knitting machine results from yarn residues of the staple fiber yarn. The machine knitting tool is therefore particularly resistant to such contamination.

In the drive section of the shaft forms at least one web portion, starting from the bottom of a web height of max. 1.1 mm. Since the underside extends in the drive portion in the common plane, the web portion abuts a corresponding surface at the bottom of the guide channel in a guide in a guide channel of the knitting machine. The web section is designed with a low height. This reduces the needle weight and increases the elasticity of the needle shaft. With jerky accelerations, the load on the foot part, at which the acceleration is initiated, reduced and the risk of breakage of the foot part is reduced. Since the web portion extends without a gap to the bottom and thus can rest with its entire bottom on a surface of the knitting machine, introduced vibrations are sufficiently attenuated. Bar or shaft sections with distance from the bottom are not available.

The at least partially small height of the shank in the drive section, in particular in the at least one web section, also reduces the torsional stiffness about a longitudinal axis which extends parallel to the longitudinal direction. When the machine knitting tool in one Circular knitting machine is moved in its transverse direction relative to a lock, transversely directed forces are introduced to the foot part, which can lead to a tilt or tilting of the foot part about this longitudinal axis. To counteract this and to be able to support machine knitting tools, at least one support elevation is present in the drive section, which elevation extends in the height direction and has a elevation height. The elevation height is greater than the web height and smaller than the Fußteilhöhe. The support elevation is arranged in the longitudinal direction at a distance from the foot part. In the area of the support elevations, the shank has a relatively high height and is supported in the knitting machine with the underside on a guide surface, which improves the supporting effect.

Between immediately adjacent machine knitting tools a channel wall of a guide channel of the knitting machine is present. The machine knitting tools are supported on the support wall on the sewer wall. The local loads on the foot part are reduced and damage is avoided or the service life of the machine knitting tools is increased. Not only at the machine knitting tools but also especially at the channel wall of the knitting machine (knitting cylinder, needle bed) damage can occur in case of breakage or damage of the machine knitting tool, which can be eliminated only with great effort and expense.

The machine knitting tool according to the invention or the machine knitting needle according to the invention has a structural design which allows high knitting speeds and is insensitive to contamination. The design features are coordinated and lead in the claimed combination to a particularly suitable design of the machine knitting tool. The closed bottom and / or the preferably closed side surfaces offer no possibility for larger accumulations of yarn residue or other dirt particles. The at least one land portion renders the machine-knitting tool insensitive to jerky accelerations introduced at the foot. The web portion is supported with the underside on a guide surface in the knitting machine, for example at the bottom of a needle channel, so that vibrations caused there are well damped and high guidance accuracy is achieved. Adjacent machine knitting tools may be supported by the support elevation on a channel wall of the knitting machine such that an inclination or a twist of a machine knitting tool about an axis parallel to the longitudinal direction may be limited.

It is advantageous if at least one pair of each two Abstützerhebungen is arranged in the drive section. Between the Abstützerhebungen a concave depression or a valley of the top of the shaft may be present. The two Abstützerhebungen the same pair may have a support distance to each other in the longitudinal direction. This support distance is in particular the smallest distance in the longitudinal direction between the maxima of the two Abstützerhebungen. The support distance may for example correspond to a length dimension of the foot part in the longitudinal direction or be slightly larger than the length dimension of the foot part.

Each support elevation can, for example, two inclined to the height direction and the longitudinal direction Have flanks. As a result, a cleaning effect can be achieved: dirt is conveyed by the slope of the flanks of the guide channel of the knitting machine. As a result, impurities are conveyed from the guide channel and the penetration of dirt particles or other contaminants under the needle shaft is reduced or avoided.

The rear end of the machine knitting tool may be disposed at an end portion of the shank. The end part, viewed in the transverse direction, has, for example, a rectangular contour. In the longitudinal direction, the end portion may have a Endteillänge. The Endteillänge can at least correspond to the support distance of two Abstützerhebungen a pair.

It is preferred if the web portion or one of the existing web portions between the at least one Abstützerhebung and the foot part is or are arranged.

It is also advantageous if the shaft in the drive section forms a plurality of web sections, each having the same web height. As a result, the bending load of a single web section can be reduced.

In another advantageous embodiment, the foot part is arranged between two support parts. The support members each extend with a support member height in the height direction H, which is at least as large as the elevation height. The two support parts may have the same or different support member heights. The support members may serve to directly engage the machine knitting tool adjacent to the foot on the channel wall of a guide channel support the knitting machine.

The machine knitting tools can form a group. All machine knitting tools of a common group differ from each other in terms of the foot position of their respective foot part. The foot position of the foot part indicates the distance of the foot part from the front end and / or the rear end. Each machine-knitting tool of a common group has at least one support elevation at the location that is in the range of the foot position of another machine-knitting tool of that group.

• Figur 1 eine Gruppe von als Maschinenstricknadeln ausgeführten Maschinenstrickwerkzeugen in perspektivischer Darstellung,
• Figur 2 eine Seitenansicht eines Ausführungsbeispiels einer Maschinenstricknadel,
• Figur 3 einen Maschenbildungsabschnitt der Maschinenstricknadel aus Figur 2,
• Figur 4 einen Querschnitt durch den Schaft der Maschinenstricknadel gemäß Schnittlinie IV-IV in Figur 3,
• Figur 5 eine Teildarstellung eines Antriebsabschnitts der Maschinenstricknadel aus Figur 2 mit einem Fußteil der Maschinenstricknadel,
• Figur 6 eine Teildarstellung des Antriebsabschnitts der Maschinenstricknadel aus Figur 2 mit einem Paar von zwei Abstützerhebungen und
• Figur 7 die Gruppe der Maschinenstricknadeln aus Figur 1, wobei die Maschinenstricknadeln jeweils in Seitenansicht veranschaulicht sind.

Advantageous embodiments of the invention will become apparent from the dependent claims, the description and the drawings. Hereinafter, preferred embodiments will be explained in detail with reference to the accompanying drawings. Show it:

• FIG. 1 a group of machine knitting needles designed as machine knitting needles in perspective view,
• FIG. 2 a side view of an embodiment of a machine knitting needle,
• FIG. 3 a knitting section of the machine knitting needle FIG. 2 .
• FIG. 4 a cross section through the shaft of the machine knitting needle according to section line IV-IV in FIG. 3 .
• FIG. 5 a partial view of a drive section of the machine knitting needle FIG. 2 with a foot part of the machine knitting needle,
• FIG. 6 a partial view of the drive section of the machine knitting needle FIG. 2 with a pair of two outrigger lifts and
• FIG. 7 the group of machine knitting needles FIG. 1 , The machine knitting needles are each illustrated in side view.

In the FIGS. 1 and 7 is a group 10 of several machine knitting tools 11 and for example a plurality of machine knitting needles 12, namely a first machine knitting needle 12a, a second machine knitting needle 12b, a third machine knitting needle 12c and a fourth machine knitting needle 12d illustrated. The number of machine knitting tools 11 per group 10 may vary. Each group 10 may include two or more machine knitting tools 11.

The machine knitting tools 11 or machine knitting needle 12 of a common group 10 are designed differently. The differences will be discussed in more detail later.

The construction of a machine knitting needle 12 will be described with reference to FIGS Figures 2-6 explained with reference to the first machine knitting needle 12a.

The machine knitting needle 12 has a shaft 15 which extends in a longitudinal direction L between a front End 16 and a front end 16 opposite rear end 17 extends. The machine knitting needle 12 is executed, for example, as a latch needle. At the front end 16 of the shaft 15 forms a needle hook 18. The needle hook 18 defines a hook interior 19 which can be opened or closed by a tongue 20 in the embodiment. The tongue 20 is pivotally mounted for this purpose about a pivot axis S in a bearing gap of the shaft 15. The pivot axis S extends in a transverse direction Q perpendicular to the longitudinal direction L. The tongue 20 may be inserted between an in FIG. 3 shown in dashed lines closed position I and an open position II are pivoted about the pivot axis S. In the closed position I, the tongue 20 abuts against the needle hook 18 and closes the hook interior 19. In the open position II, the tongue 20 is removed from the needle hook 18 and releases the hook interior 19, so that a loop in the hook interior 19 or taken from the hook interior 19 can be removed. In the knitting process, the tongue 20 is moved by means of a stitch or a yarn section between the closed position I and the open position II.

By way of example, the area of the machine knitting needle 12 on which the needle hook 18 and the tongue 20 are arranged forms a stitch forming section M. The stitch forming section M immediately adjoins the front end 16. It preferably ends at the point at which a bearing gap for receiving the tongue 20 ends. Alternatively, the front end 16 opposite end of the stitch forming portion M may be formed by the position occupies the free end of the tongue 20 in the maximum of the needle hook 18 removed the open position II.

Apart from the bearing gap, the shaft 15 of the machine knitting needle 12 is preferably designed without cavities or perforations, in particular slots or holes. In FIG. 4 is the shaft 15 in its cross section along section line IV-IV in FIG. 3 shown and has, for example, a substantially rectangular cross-section with gripped corner areas. The cross section could also have an oval, round or other shape.

At the rear end 17, a drive section A of the machine knitting needle 12 connects directly. In the embodiment, the stitch forming portion M is connected to the driving portion A via an intermediate portion Z. The intermediate section Z closes example, on the one hand directly to the stitch forming section M and on the other hand directly to the drive section A.

In the drive section A, the machine knitting needle 12 has a foot part 24 which is adapted to cooperate with a lock of a knitting machine and in particular a circular knitting machine. By means of the foot part 24, the machine knitting needle 12 can be moved or positioned in the longitudinal direction L. In a circular knitting machine for this purpose, a knitting cylinder is driven to rotate about a rotation axis which extends parallel to the longitudinal direction L. Here, the foot part 24 projects into a path of the lock of the knitting machine and positions or moves the machine knitting needle 12 depending on the course of the web in the longitudinal direction L.

The shaft 15 has different heights outside of the stitch formation section M in a height direction H, which is oriented at right angles to the longitudinal direction L and at right angles to the transverse direction Q. The height of the shank 15 or the parts thereof is in each case given in relation to a plane E, in which a lower side 25 of the shank 15 extends. Outside the stitch forming section M, the underside 25 extends at any point of the shaft 15 within the plane E and has no elevations, or depressions relative to this plane E. Only immediately following the rear end 17, the bottom 25 can pass through a radius or bevel in a rear edge at the rear end 17. This radius or chamfer does not belong to the bottom 25, which extends completely within the plane E.

At the bottom 25 close to two side surfaces 26 of the shaft 15, which are arranged in the transverse direction Q at a distance from each other. In the exemplary embodiment, the two side surfaces 26 extend in each case in one plane, wherein these planes are aligned parallel to one another and are spanned by the longitudinal direction L and the height direction H. Opposite to the bottom 25 of the shaft 15 has a top 27. The top 27 and the bottom 25 are connected by the two side surfaces 26 with each other.

The side surfaces 26 are formed outside the stitch forming section M without depressions or perforations, but instead form continuous, closed surfaces. Outside the stitch forming section M, the shaft 15 may have elevations and depressions which are open at the upper side 27.

Within the drive section A forms the Shaft 15 at least one and, according to the example, a plurality of web portions 30 spaced apart from one another in the longitudinal direction L. Each web portion 30 has a web height h1 in the height direction H which is at most 1.1 mm. In the exemplary embodiment, each machine knitting needle 12 has three web sections 30. In the drive section A, the shaft 15 at the web portions 30 with the web height h1 each has its lowest height. The web sections 30 all have the same web height h1 in the exemplary embodiment. It would also be possible for two or more web sections 30 each to have different web heights.

The foot part 24 has in height direction H a Fußteilhöhe h2, which is significantly larger than the web height h1. At the foot part 24, the shaft 15 or the machine knitting needle 12 has its greatest height, so that the foot part height h 2 represents the maximum height of the shank 15.

In the drive section A, the shaft 15 also has at least one support elevation 31. In the embodiment, two support elevations 31 each form a common pair 32. The support elevations 31 are arranged in the longitudinal direction L at a distance from the foot part 24. According to the example, at least one web section 30 is located between the foot part 24 and the at least one support elevation 31.

In the embodiment described here, the machine knitting needles 12 each have two groups 32 and thus a total of four support elevations 31. Each support elevation 31 has a hump-shaped shape and a location of maximum height, which has a height of elevation h3 ( FIG. 6 ). Starting from the area or place with Maximum height (elevation h3), each Abstützerhebung 31 has on opposite longitudinal sides in each case a flank 33 which extends obliquely to the height direction H and obliquely to the longitudinal direction L. The two Abstützerhebungen 31 a common group 32 define in the longitudinal direction therebetween a valley 34 which is connected to a respective flank 33 of the Abstützerhebungen 31. The two Abstützerhebungen 31 have in the longitudinal direction L between their maxima, which they have the elevation h3, a support distance x, which represents the minimum distance in the longitudinal direction L between the maxima of the two Abstützerhebungen 31. Preferably, the height of the shaft in a valley 34 is at least as large and, according to the example, larger than in the web sections 30.

In the exemplary embodiment, the support distance x is at least as great as a longitudinal dimension y of the foot part 24 in the longitudinal direction L (FIG. Figures 2 and 7 ).

In the embodiment described here, the two elevations 31 of a pair 32 can be configured identically. Preferably, each machine knitting needle 12 has at least one group 32 with two identical support elevations 31. The two elevations 31 of a group 32 can also be designed differently from each other.

In the drive section A, the foot part 24 is arranged in the exemplary embodiment between two support parts 38 which each have a support part height h4 in the height direction H ( FIG. 5 ). The support member height h4 of the two support members 38 is preferably the same size. The support member height h4 is at least as large as the elevation height h3 of the Abstützerhebungen 31 and according to example larger. The support member height h4 is smaller than the foot part height h2.

The two support members 38 each pass through a transition section 39 on the upper side 27 into the foot part 24. The transition portion 39 has at least partially a lower height than the support members 38 and may be formed, for example, by a concave profile of the top 27. On the transition section 39 each opposite side of the respective support member 38 in the embodiment has an edge 40 which extends substantially in the vertical direction H or with respect to the height direction H includes an acute angle and in particular a small acute angle with a maximum of 10 ° to 15 °. The steepness of the edge 40 relative to the longitudinal direction L is greater than the steepness of the flanks 33 of the Abstützerhebungen 31st

The machine knitting needle 12 has an end portion 49 immediately following its rear end 17. The end portion 49 has an end portion height h5 which is at least as large as the elevation height h3 and in the embodiment at least as large as the support member height h4. The final part height h5 is smaller than the foot part height h2.

In some of the machine knitting needles 12, particularly the first machine knitting needle 12a, the second machine knitting needle 12b and the third machine knitting needle 12c, the end portion 49 has a substantially rectangular contour. In the fourth machine knitting needle 12d, the foot part 24 is arranged close to the rear end 17, so that there arranged between the rear end 17 and the foot part 24 support member 38 is modified Has shape and instead of its edge 40 by means of a slope 50 to the rear end 17 drops ( FIGS. 1 and 7 ). The end portion 49 of this fourth machine knitting needle 12d thus differs from that of the other machine knitting needles 12a, 12b, 12c.

As it is in particular in the FIGS. 1 and 7 As can be seen, the distance of the foot portion 24 from the front end 16 and the rear end 17 at each machine knitting needle 12a, 12b, 12c, 12d a common group 10 is different, so that each of these machine knitting needles 12a, 12b, 12c, 12d a different Has foot position. In the region of the shaft on which the foot part 24 of another machine knitting needle of this group 10 is located, the machine knitting needle has the at least one support elevation 31 or the pair 32 of two support elevations 31 FIG. 7 is illustrated by the dashed lines that, for example, at the foot position of the foot portion 24 of the second machine needle 12 b, each of the other machine knitting needles 12 a, 12 c and 12 d of this group 10, a pair 32 is arranged with two Abstützerhebungen 31. The machine knitting needles 12a, 12c and 12d may be supported in the guide channel when the foot member 24 is tilted or tilted about an axis parallel to the longitudinal direction L during operation of a circular knitting machine, since a force in the transverse direction Q acts on the foot member 24 during operation. By supporting a damaging the foot part 24 and the knitting machine is avoided or reduced this risk.

All machine knitting needles 12a, 12b, 12c and 12d of a group 10 have the same overall length between the front end 16 and the rear end 17 in FIG Longitudinal direction L.

The machine knitting needle 12 described is particularly suitable for knitting staple fiber yarns, for example cotton yarns. It is insensitive to contamination, especially cotton or yarn remnants that get into the guide channel of the knitting machine during knitting. In addition, the machine knitting needle 12 is capable of absorbing jerky accelerations introduced via the foot member 24 and has a long service life.

The invention relates to a machine knitting tool 11 and more particularly to a machine knitting needle 12 having a shank 15 extending in the longitudinal direction L. The machine knitting tool 11 has a stitch forming section M immediately adjacent to a front end 16 and a drive section A immediately following a rear end 17. At least In the drive section A has a bottom 25 of the shaft 15 no recesses or recesses and extends along a plane E. The shaft 15 forms in the drive section A at least one web portion 30 with a web height h1, which is a maximum of 1.1 mm. In addition, the shaft 15 in the drive section A forms at least one support elevation 31, which extends beyond the web height h1 of the at least one web section 30 in the height direction H and has a raised height h3 in its place with maximum height.

LIST OF REFERENCE NUMBERS

10

group

11

Machine knitting tool

12

Machine knitting needle

12a

first machine knitting needle

12b

second machine knitting needle

12c

third machine knitting needle

12d

fourth machine knitting needle

15

shaft

16

front end

17

rear end

18

needle hook

19

Hook interior

20

tongue

24

footboard

25

bottom

26

side surface

27

top

30

web section

31

Abstützerhebung

32

Pair

33

flank

34

valley

38

supporting part

39

Transition section

40

edge

49

end

50

slope

I

closed position

II

open position

A

driving section

e

level

H

height direction

h1

Base height

h2

footboard

h3

bump height

h4

Supporting part height

h5

Endteilhöhe

L

longitudinal direction

M

Stitch-forming section

Q

transversely

S

swivel axis

x

support distance

y

Longitudinal dimension of the foot part

Z

intermediate section

Claims (12)

1. Machine knitting tool (11), in particular machine knitting needle (12),
   with a shank (25) extending in a longitudinal direction (L) and having an underside (25), a top side (27) opposite the underside (25) and two side faces (26) which are arranged spaced apart in a transverse direction (Q) and connect the underside (25) and the top side (27),
   wherein a stitch-forming portion (M) is present which is directly adjacent to a front end (16),
   wherein a drive portion (A) is present which is directly adjacent to a rear end (17) opposite the front end, and in which a foot part (24) extends with a foot part height (h2) in a height direction (H) perpendicular to the longitudinal direction (L) and the transverse direction (Q), said foot part being configured to cooperate with a lock of a knitting machine,
   wherein the underside (25) extends in a plane (E) at least outside the stitch-forming portion (M) and is free from depressions,
   characterised in that the shank (15) in the drive portion (A) forms at least one web portion (30) with a web height (h1) of maximum 1.1 mm,
   and that at least one support protrusion (31) extends in the height direction (H) in the drive portion (A) and is arranged spaced from the foot part (24) in the longitudinal direction (L) and has a protrusion height (h3) which is greater than the web height (h1) and smaller than the foot part height (h2).
2. Machine knitting tool according to claim 1, characterised in that at least one pair (32) of two support protrusions (31) is arranged in the drive portion (A).
3. Machine knitting tool according to claim 2, characterised in that the two support protrusions (31) of the same pair (32) are arranged at a support distance (x) from each other in the longitudinal direction (L).
4. Machine knitting tool according to claim 3, characterised in that the support distance (x) is the smallest distance between the maxima of the two support protrusions (31) in the longitudinal direction (L).
5. Machine knitting tool according to claim 3 or 4, characterised in that the support distance (x) corresponds to a length dimension (y) of the foot part (24) in the longitudinal direction (L).
6. Machine knitting tool according to any of the preceding claims, characterised in that the rear end (17) is arranged on an end part (49) of the shank (15) with a substantially rectangular contour.
7. Machine knitting tool according to claim 6, characterised in that an end part height (h5) of the end part (49) in the height direction (H) is at least as large as the protrusion height (h3).
8. Machine knitting tool according to any of the preceding claims, characterised in that each support protrusion (31) has two flanks (33) running obliquely to the height direction (H) and obliquely to the longitudinal direction (L).
9. Machine knitting tool according to any of the preceding claims, characterised in that the web portion (30) or one of the web portions (30) is arranged between the at least one support protrusion (31) and the foot part (24).
10. Machine knitting tool according to any of the preceding claims, characterised in that the shank (15) in the drive portion (A) forms several web portions (30) which each have the same web height (h1).
11. Machine knitting tool according to any of the preceding claims, characterised in that the foot part (24) is arranged between two support parts (38) which each extend with a support part height (h4) in the height direction (H) which is at least as large as the protrusion height (h3).
12. Group (10) of several machine knitting tools (11) according to any of the preceding claims,
    wherein the foot part (24) of each machine knitting tool (11) of the group (10) is arranged at another foot position with another distance from the front and/or rear end (16, 17) than all other machine knitting tools (11) of this group (10),
    and wherein each machine knitting tool (11) of the group (10) has the at least one support protrusion (31) at a location in the longitudinal direction (L) which lies the region of the foot position of another machine knitting tool (11) of this group (10).

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