EP1094139A1 - Slider needle with asymmetrical formed slider - Google Patents

Abstract

A slide needle (1) has a slide (3) which has two slide springs (22, 23). These are designed to be asymmetrical with respect to one another or at least provided with openings or cutouts which, during operation of the slide needle, are brought into line with a corresponding cutout or other openings in the base body of the slide needle, so that deposits can be removed into the needle channel. An asymmetrical design of the slide springs (22, 23) prevents the slide (3) from jamming in the slide channel (7), even if deposits are only incompletely removed, which significantly reduces wear on the slide needle and increases operational reliability.

Description

The invention relates to a slide needle with the Features of the preamble of claim 1 or Claim 2.

Slider needles, such as those for flat knitting machines or Circular knitting machines have a needle body with a slide channel in which a slide is slidably mounted. At the free end of the needle body a needle head is designed in the form of a hook, which are opened or closed by the slide can. The knitting machine has at least one flat or a cylindrical and or a plate-shaped needle bed on, formed in each of several needle channels are. The slider needles are in these needle channels arranged longitudinally displaceable, being during the Knitting a reciprocating in the longitudinal direction Carry out movement. The slide must be matched to this be moved back and forth. The slide points to this a so-called foot, which acts as a means of transmission serves and engages with curved surfaces. Such For example, curved surfaces are the edges of one so-called castle channel.

In the knitting process comes both the head and the slide of the slide needle is in contact with the yarn, whereby depending on the nature and carried dirt load dust or filament deposits on the yarn Slider can occur. For example, if wool is knitted, dust particles adhering to the wool, from salt crystals, sand or short ones from woolen laundry Filaments are deposited on the slider. Through the back and forth movement of the slide can do this Particles get into the gate valve, causing difficulties can lead.

Such a slide needle is known from US Pat. No. 1,673,634 known with divided slide. The slider is through two interconnected slide springs formed the each side over the hook of the slide needle push, causing them to spread out.

The arrangement of the slide needle is similar DE 44 30 705 A1. Again, the slider formed by two slide springs, which are located on the side of the Spread the hook over, creating dirt deposits between the slide springs can get.

This also applies to the needle according to EP 08 75 614 A2 to. The slide needle has a needle body with needle channel that guides a slide. The slider is formed by a slide body, on which two mutually symmetrical trained slide springs are. The slide springs are operated by the Periodically spreading the needle head, leaving dirt and fiber residues in the defined between the slide springs Gap can reach.

From DE-OS 21 46 981 is also a Slider needle known, the needle body a slider channel with openings on the back. The two Side walls of the slide channel are continuous without openings trained and limit the Slide channel. The slider held in it has elongated holes which are penetrated by guide pins. The Guide pins are each in the slide side walls anchored. The slide is formed in one piece.

Another previously known needle is from the DE 31 23 785 A1 discloses. This slide needle has one in two mutually symmetrical slide springs divided slide on which is closed on three sides Slider channel of the slider needle arranged is. To guide the slider, it has an elongated hole provided by a guide pin is penetrated.

Here too, as with most of the aforementioned Pushpins, the problem that dirt between the can reach both slide springs. If this happens, you can this for the gradual spreading of the slide springs in the slide channel so that the slide in the Slider channel becomes stiff with increasing contamination becomes. This leads to increased friction and wear. in the In extreme cases, the slide can become stiff and jam in the slide channel that the stitch formation, stitch transfer and knitting is hindered. In extreme cases, the slide parts stop moving in the slide channel of the needle body, so it breaks the foot.

Proceeding from this, it is an object of the invention, a to create a needle that is less susceptible to contamination.

This task is alternatively done with the slide needle according to claim 1 or the slide needle according to claim 2 solved:

Both solutions have in common that the shared Slider is less prone to jamming when contaminated. At least one space is present in the slide channel, in where fiber remnants can collect without the slide springs to spread. According to claim 1, the slide springs mutually asymmetrical. This means that they only partially overlap in the slide channel can and therefore not fill parts of the slide channel. This alone creates additional buffer space in the slide channel created to absorb foreign substances, so that the slide becomes less likely to jam and occurs less quickly. It is advantageous here if the slide channel is also open laterally, that At least one of the channel side walls is called an opening or has recess. Alternatively or additionally you can one or more openings in the bottom of the slide channel be provided. The side opening can be through a cutout can be formed in the slide channel wall. Due to the relative movement between the slide and the Needle bodies can build up deposits as a result of Asymmetry of the two slide springs to the slide channel wall can get through these openings or recesses be discharged into the needle channel. For this become it in turn by the relative movement between the Needle and the needle channel removed.

This principle is also the slide needle according to claim 2 based. Leave recesses in the slide springs first to that accumulated between the slide springs Deposits from between the slide springs formed gap to the slide channel walls and through their Open openings to the outside.

By preventing that between the slide springs accumulating deposits the slide springs firmly spread and clamp against the slide channel walls, will the smooth running of the needle even then permanently get when yarns with relatively high dirt load too are processed. The slide needle according to the invention proves is therefore less susceptible to contamination.

It is advantageous if the slide springs have recesses have at different points in the two slide springs are arranged. The cutouts create recording rooms and passages for in the Dirt channel got dirt and also prevent jamming the dirt between the slide springs. This also applies in part if the recesses are opposite each other are arranged overlapping areas. The overlap The cutouts minimize areas between the Slider springs, in which dirt and the Could spread slide springs.

An advantageous embodiment of the slide needle has a multi-piece slide that consists of a Slider body and slider springs is formed. This Parts (slide springs and slide body) can be detached or be inextricably linked. The slide springs have longitudinally extending through the slide channel, staggered web areas and web sections that preferably do not overlap each other. Thereby the above advantages in particular Dimensions reached. The web sections and web areas extend and preferably through the slide channel guided laterally from the canal side walls. A tour is parallel to the slide walls by guide sections get into which the web sections merge. These guide sections are preferably based on the longitudinal direction, offset from each other, so that the dirt does not even come between the guide sections can accumulate.

In addition, the slide springs can also be between the guide sections and a respective mesh support section be asymmetrical what here too a reduced tendency to accumulate dirt and tendency to jam. The slide springs are thus largely free of overlaps.

It is advantageous if the are asymmetrical to each other trained sections of the slide springs largely in the slide channel are arranged. This will be a good one Lateral guidance of the slide springs is achieved, which is a reliable The needle works even at high working speeds enables.

Further details of advantageous embodiments the invention result from the drawing, the description or subclaims.

Figur 1 eine erfindungsgemäße Schiebernadel in perspektivischer Explosionsdarstellung,

Figur 2 und 3 die Schieberfedern 22, 23 der Schiebernadel 1 nach Figur 1, in einer Seitenansicht

Figur 4 den Schiebergrundkörper 21 der Schieberfedern 22, 23 der Schiebernadel 1 nach Figur 1, in einer Seitenansicht

Figur 5 die Schiebernadel nach Figur 6, geschnitten entlang der Linie VI-VI, in einem anderen Maßstab,

Figur 6 die Schiebernadel nach Figur 1 mit Schieber in einer perspektivischen Darstellung,

Figur 7 einen Schieber in abgewandelter Form einer Schiebernadel, in einer Seitenansicht,

Figur 8 und 9 zu dem Schieber nach Figur 7 gehörige Schieberfedern, in Seitenansicht,

Figuren 10 und 11 Schieberfedern einer Schiebernadel in einer abgewandelten Ausführungsform, in schematisierter Seitenansicht.

Exemplary embodiments of the invention are illustrated in the drawing. Show it:

FIG. 1 shows a slide needle according to the invention in an exploded perspective view,

Figures 2 and 3, the slide springs 22, 23 of the slide needle 1 of Figure 1, in a side view

Figure 4 shows the slide main body 21 of the slide springs 22, 23 of the slide needle 1 of Figure 1, in a side view

FIG. 5 the slide needle according to FIG. 6, cut along the line VI-VI, on a different scale,

FIG. 6 the slide needle according to FIG. 1 with slide in a perspective view,

FIG. 7 shows a slide in a modified form of a slide needle, in a side view,

8 and 9 slide springs belonging to the slide according to FIG. 7, in a side view,

Figures 10 and 11 slide springs of a slide needle in a modified embodiment, in a schematic side view.

A slide needle 1 is illustrated in FIG. 1, to which a needle body 2, a slide 3, consisting of two slide springs 22, 23 and a slide body 21 belong. The needle body 2 is for insertion into the needle channel provided a knitting machine and has a elongated needle shaft 4 on at its free end carries a hook 5. The needle shaft 4 extends away from the hook 5 in a straight longitudinal direction. Right away following the hook 5 begins a slit-shaped Slider channel 7, the two sides of two channel side walls 8, 9 is limited. The channel side walls 8, 9 are flat, plate-shaped structures that are parallel at a distance protrude towards each other from the needle body 2. You point starting from a slot start 11, initially an increasing one Height up. In a first, look at this area increasing height adjoining area 12 is the height of the side walls 8, 9 then approximately constant. After another The side walls 8, 9 then increase in height an area 14 with increased height. The slide channel 7 therefore has two different guide sections on, which are formed by the regions 12, 14.

The channel side walls 8, 9 are related to the longitudinal direction of the needle body 2 starting from the hook 5 at least so long that the side walls during the practical Use of the slide needle 1 is not complete move out of a needle channel. This gives the Needle 1 at least part of their leadership.

Following on from the channel side walls 8, 9 Area is the needle body 2 with an elongated Cutout 15 provided with respect to the longitudinal direction on one side through the channel side walls 8, 9 and another side delimited by a projection 16 becomes. The cutout 15 forms an area in which the Slider channel 7 is open. Instead of section 15 can also be provided side or bottom openings his.

The slide 3 has a slide body 21 (FIG. 4) and two slide springs 22, 23 on the slide body 21 are held. It is essentially through an elongated body with a rectangular cross section, on which one or more feet 24 are formed. These protrude at right angles from the slide body 21 and serve to drive it. In operation they intervene the lock channel of a lock and are used by this moved relative to the needle body 2. In his front Area, the slide body 21 has a receiving area 82 to which the slide springs 22, 23 are connected are. On its side facing the needle body 2 the slide body 21 has a flat surface 84. The Thickness of the slide base body 21 is approximately the same, like that of the needle body 2.

The slider 3 can be made in one piece from the slider body 21 and the two slide springs 22, 23 are formed, these being detachable or non-detachable with the slide body 21 can be connected. In operation, they form a common Part.

In Figure 2 and 3, the slide springs 22, 23 are separate shown. The slide spring 22 is essentially by an elongated, rectangular in cross section Body formed. Extending from its end region 81 a web area 34 to a guide section 35, which is arranged so that it to the bottom of the slide channel 7 maintains a clear distance if the Slider spring 22 in or on the needle body 2 on or. is scheduled. In other words, the slide spring 22 has a recess or recess in the web area 34 34a.

Following the web area 34 is a guide section 35 trained, which is approximately the full amount of Slider channel 7 has, in special applications protrudes beyond this. The guide section 35 is with provided with a lower contact surface 37 which is in use abuts the flat bottom of the slide channel 7 and thus in Figure 3 also marked its height.

The guide section 35 is on its hook 5 or stitch retaining nose 33 facing side by a step 38 bounded at right angles to the contact surface 37 is aligned and goes here again in a narrow Web section 39 over. This web section 39 carries one plate-shaped, larger section 41, which at its the Mesh holding nose 33 facing side a mesh support shoulder 42 specifies.

The slide spring 23 illustrated in FIG. 2 is built up asymmetrically to the slide spring 22 in some areas. Both slide springs 22, 23 are in relation to one plane between them not mirror-symmetrical. The slide spring 23 extends from the end region 81 starting from a web area 47 to a guide section 48, into which he passes with a steep step 49. The Slide spring 23 is from above with a recess 47a provided, preferably with a lateral overlap the web area 34 of the slide spring 22. Both Recesses 34a, 47a can be of such a size that they partially overlap on their broad sides. At the Recess 47a opposite side, is on the slide spring 23 a contact surface 52 is formed. This lower one Contact surface 52 lies on the bottom of the slide channel 7 on.

The guide portion 48 of the slide spring 23 is against the guide section 35 of the slide spring 22 in Staggered in the longitudinal direction such that the steps 38, 49 in are spaced from each other. There are also Applications in which the slide springs 22, 23 so are designed so that the two stages 38, 49 cover or stand in alignment with each other. Largely The web areas 34, 47 are arranged without overlap. This is particularly evident from FIG. 1 and FIG. 5. The guide section 48 of the slide spring 23 goes via a web section 53 without a transition or through a Cutout (not shown) in a plate-like Section 54 about. This is mirror symmetrical to that Section 41 of the slide spring 22 is formed and lays a mesh support shoulder 55 firmly.

The formation of the slide needle 1 and in particular the slide springs 22 and 23 go in detail from the Figure 6 out. When assembled, the grips Receiving area 82 of the slider body 21 in the cutout 15 of the needle body 2. The slide springs 22, 23 extend freely through the slide channel 7, the Web areas 34, 47 as can be seen from FIGS. 5 and 6, do not significantly overlap each other. As in Figure 5 shown, the lower edge of the web area 34 can approximately level with the upper edge of the web area 47 be arranged. In many cases, however, it can also be beneficial be to allow a distance here so that the The lower edge of the web area 34 clearly above the upper edge of the web area 47 is arranged and the recesses 34a, 47a overlap. Then it is a gap S formed, which is inclined against the channel side wall 8, 9.

In addition, it can be advantageous if the web area 47 not over its full length at the bottom of the Slider channel 7 is present.

The steps 38, 49 of the guide sections 35, 48 are spaced apart in the longitudinal direction so that this do not overlap. The slide channel 7 extends as Figures 1 and 6 illustrate, far in the direction on the hook 5 and the beginning of the slot 11 is thus arranged in the immediate vicinity of the hook 5. This front area 12 of the slide channel 7 gives the web sections 39, 53 guide up to close to the hook 5 approach.

The slide needle 1 described so far works as follows:

In operation, the slide 3 reciprocates moved against the needle body 2. In a withdrawn Position, the slide springs 22, 23 are almost completely retracted into the slide channel 7. The recording area 82 of the slide body 21 gives a front Part of the cutout 15 free, so that a large area Passage between the slide channel 7 on the channel side walls 8, 9 released over to the flanks of the needle channel is.

If the slide 3 is now moved against the needle body 2, the hook 5 enters the gap between the stitch retaining noses and spreads the slide springs 22, 23rd something on. Filaments, dust or other can also be used Deposits get between the slide springs 22, 23. The slider 3 is then retracted back into its Moved position hears the spreading of the slide springs 22, 23 and they will be included in the Gap of dirt is drawn into the slide channel 7. Carried filaments or other dirt can now however, this also does not lead to jamming of the slide springs 22, 23 lead in the slide channel 7, if many successive strokes always new deposits in reach the gap. The web areas 34, 47 do not press against each other, but past each other. The slide needle is therefore largely insensitive to dirt accumulation. Dirt that is carried along is also removed the relative movement between the web areas 34, 47 and the channel side walls 8, 9 in the cutout 15 and through discharged this into the needle channel.

FIG. 7 shows a modified form of the slide 3. It has a slide body 21 'and two slide springs 22 ', 23', which are held on the slide body 21 '. The slide 3 'can also be formed in one piece. The Slider body 21 'is essentially an elongated, cross-sectionally rectangular web on which one or more feet 24 'are formed. These protrude at right angles from the slide body 21 'and serve the Same drive. In operation they reach into the lock channel of a castle and are relative to it Needle body 2 moves.

The slide body has in its front area 21 'has a guide section 25 on which the Needle body 2 facing side formed a flat surface 26 is. The thickness of the guide section is the same like the one that extends to the feet 24 ' Section of the slide body 21 'and coincides approximately the thickness of the needle body 2 match.

A holding section closes the guide section 25 27 on, as a projection from the slide body 21 'protrudes away into the cutout 15. The height of the holding section 27 agrees with the depth of the section 15 match. In the longitudinal direction, however, it is shorter than that Section 15, so that a significant longitudinal movement of the Slider 3 'is allowed.

Furthermore, the slide 3 'has on its holding section 27 a flat, wide, laterally open groove 28 for receiving holding ends 29 of the slide springs 22 ', 23' on with a window cutout 31 of the slider body 21 'are caulked.

Starting from the holding ends 29, the Slide springs 22 ', 23' on a window cutout 31 or a fastener over. They always take action a mounting foot 32 in the window cutout 31 and are set up for caulking with this. The outermost opposite end is by stitch retaining lugs 33 educated.

8 and 9, the slide springs 22 ', 23' shown separately. The slide spring 22 'essentially by an elongated, rectangular in cross section Body formed. Starting from their stopping area 29, a web area 34 'extends to a guide section 35 '. Following the mounting foot 32 goes the slide spring 22 'in a web area 34', the is less high than the side walls 8, 9 of the needle body and which is arranged to face the floor the slide channel 7 maintains a clear distance, if the slide 3 'in or on the needle base 2 is inserted or scheduled. In other words, the slide spring 22 'has a recess in the web area 34' or recess 34a '.

Following the web area 34 'is a guide section 35 'formed, which is approximately the full height of the Slider channel 7 has, in special applications protrudes beyond this. At its upper end it is with a contact surface 36 for the flat surface 26 of the guide section 25 of the slide body 21 '. At his opposite side is the guide portion 35 ' a lower abutment surface 37 'which is in use abuts on the flat bottom of the slide channel 7 and thus also marked its height in FIG.

The guide section 35 ′ is on the hook 5 thereof or stitch retaining nose 33 facing side by a step 38 'bounded at right angles to the contact surface 37' is aligned and goes here again in a narrow Web section 39 'over. This web section 39 'carries a plate-shaped, larger section 41 'which at its a stitch support shoulder facing the stitch retaining nose 33 42 '.

The slide spring 23 'illustrated in FIG. 9 is to the slide spring 22 'constructed asymmetrically in some areas. Both slide springs 22 ', 23' are with respect to one plane between them not mirror-symmetrical. In the slide spring 23 'extends from the holding end 29 starting from a web area 47 'to a guide section 48 ', into which it merges with a steep step 49'. The slide spring 23 'is from above with a Recess 47a 'provided, which is preferably a lateral Overlap with the web area 34 'of the slide spring 22' having. Both cutouts 34a ', 47a' can be such Size that they are partially on their broadsides overlap. The guide section 48 'has at its upper Side a contact surface 51, which in use on the Flat surface 26 of the slide body 21 'abuts. On his lower side opposite the contact surface 51, a contact surface 52 'is formed on the slide spring 23', which spans a large part of the dock area 47 'extends. This lower contact surface 52 'lies on the Bottom of the slide channel 7.

In addition, it can be advantageous if the web area 47 'not over its full length at the bottom of the Slider channel 7 is present. For this purpose, the web area 47 ' a stage 58 illustrated in FIG. 9.

The guide portion 48 'of the slide spring 23' is against the guide section 35 'of the slide spring 22' in Staggered in the longitudinal direction such that the steps 38 ', 49' are at about the same level or slightly Longitudinal spacing are arranged. There are Applications are also conceivable in which the slide springs 22 ', 23' are designed so that the two stages 38 ', 49' cover or stand in alignment with each other. The land areas are also largely free of overlaps 34 ', 47' arranged. The slide spring 23 'has Connection to the guide section 48 'a web section 53 'which merges into a plate-like section 54'. This is mirror-symmetrical to section 41 ' the slide spring 22 'is formed and places a mesh support shoulder 55 'firmly.

A modified embodiment of the slide needle 1 is with the slide springs 22 ", 23" according to Figure 10 and 11 received. The slide springs 22 ″, 23 ″ are mirror-symmetrical to each other, with in their land areas or sections 34 '', 39 '' or 47 '', 53 '' slot-shaped recesses 61, 62 are formed, the both as collection rooms for fibers and other deposits can serve, as well as at least occasionally in the Area of the cutout 15 of the needle body 2 transferred so that existing deposits here in the needle channel can be dissipated. It may be Pinch sensitivity of a needle with the slide springs 22 '', 23 '' but slightly larger than that of a slide needle with the slide springs 22, 23 or 22 ', 23' after Figure 2, 3 or 8 and 9. Otherwise, the slide springs are correct 22 '', 23 '' largely with the slide springs 22 ', 23' match, so that on the corresponding description under On the basis of the same reference numerals. The Slide springs 22 ″, 23 ″ can also be designed asymmetrically be by the recesses 61, 62 against each other are offset.

A slide needle 1 has a slide 3, the has two slide springs 22, 23. These are related to each other asymmetrical or at least with openings or recesses 34a, 47a provided during operation of the Slide needle 1 with a corresponding recess 15 or other openings in the base body 2 of the slide needle 1 be matched so that Deposits can be removed into the needle channel. An asymmetrical design of the slide springs 22, 23 prevents sticking of the slide 3 in the slide channel 7, even if deposits are incomplete be removed, which shows the wear of the slide needle 1 significantly reduced and operational reliability increased.

Reference list

1

Slide needle

2nd

Needle body

3rd

Slider 3 '

4th

Needle shaft

5

hook

6

7

Slide channel

8.9

Canal sidewalls

10th

11

Slot start

12th

Area

13

14

Area

15

Neckline

16

head Start

17th

Guide groove

21

Slide body 21 '

22.23

Slide springs 22 ', 23' 22 '', 23 '

24th

Foot 24 '

25th

Guide section

26

Flat area

27

Holding section

28

Groove

29

Stop ends

31

Window cutout

32

Mounting foot

33

Stitch retaining nose

34a

Recess 34a '

34

Bridge area 34 '34' '

35

Guide section 35 '

36

Contact surface

37

lower contact surface 37 '

38

Level 38 '

39

Bridge section 39 '39' '

41

Section 41 '

42

Mesh support shoulder 42 '

43

47

Bridge area 47 '47' '

47a

Recess 47a '

48

Guide section 48 '

49

Level 49 '

51

Contact surface

52

lower contact surface 52 '

53

Bridge section 53 '53' '

54

Section 54 '

55

Mesh support shoulder 55 '

56

57

58

step

59

61.62

Recess

81

End area

82

Recording area

83

84

Flat area

Claims (14)

Slider needle (1) for knitting and knitting machines, in particular for flat knitting machines or circular knitting machines, with a needle body (2) which has a slide channel (7), with a slide (3) which is arranged to be longitudinally displaceable in the slide channel (7) and which has two slide springs which extend through the slide channel (7),
characterized, that the slide springs (22, 23, 22 ', 23') are designed to be asymmetrical to one another at least in their sections which extend through the slide channel (7). Slider needle (1) for knitting and knitting machines, in particular for flat knitting machines or circular knitting machines, with a needle body (2) which has a slide channel (7), which is delimited in sections by slide channel walls, with a slide (3) which is arranged to be longitudinally displaceable in the slide channel (7) and which has two slide springs which extend through the slide channel (7),
characterized, that at least one of the slide springs (22, 23, 22 ', 23', 22 '', 23 '') has at least one recess (34a, 34a ', 47a, 47a', 61, 62), which at least briefly during operation is transferred into the open area (15) of the slide channel (7). Sliding needle according to claim 1 or 2, characterized in that the slide springs (22, 23, 22 ', 23', 22 '', 23 '') with recesses (34a, 34a ', 47a, 47a', 61, 62) are provided, which are preferably on the two slide springs are arranged in different places. Sliding needle according to claim 3, characterized in that the recesses (34a, 34a ', 47a, 47a', 61, 62) are arranged partially overlapping one another. Sliding needle according to claim 1 or 2, characterized in that the slide springs (22, 23, 22 ', 23', 22 '', 23 '') on a slide body (3) at an attachment point (31) and that they differ from the Fastening point (31) extending web sections (34, 47, 34 ', 47', 34 '', 47 ''), each in pass over a guide section (35, 48, 35 ', 48'). Sliding needle according to claim 5, characterized in that the web areas (34, 47, 34 ', 47', 34 '', 47 '') arranged essentially not overlapping each other are. Sliding needle according to claim 5, characterized in that the guide sections (35, 48, 35 ', 48') based on the longitudinal direction offset from each other are. Sliding needle according to claim 5, characterized in that the slide springs (22, 23, 22 ', 23', 22 '', 23 '') have a stitch retaining nose (33) and that between the respective guide section and the stitch retaining nose Areas are formed in which the slide springs are asymmetrical to each other. Sliding needle according to claim 1, characterized in that the slide springs are largely free of overlaps are trained. Sliding needle according to claim 1, characterized in that those who are asymmetrical Portions of the slide springs largely in the slide channel (7) are arranged. Sliding needle according to claim 2, characterized in that at least one of the slide channel walls (8, 9) of the needle body (2) has at least one opening (15), through the accumulation of foreign bodies in the needle channel a knitting machine can be removed. Sliding needle according to claim 2, characterized in that the open area (15) by a in the Bottom of the slide channel (7) formed opening is due to the accumulation of foreign bodies in the needle channel a knitting machine can be removed. Sliding needle according to claim 1 and 2, that the slide springs (22 ', 23', 22 '', 23 '') an upper (36, 51) and a lower (37 ', 52 ') have contact surfaces and that these contact surfaces are each approximately equally spaced. Sliding needle according to claim 13, characterized in that the slide springs (22 ', 23', 22 '', 23 '') are formed higher than the channel side walls, so that the contact surfaces (36, 51) above the channel side walls (8, 9) are arranged.

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