EP2942429B1 - Warp knitting needle and needle bar - Google Patents

Description

The invention relates to a knitting needle with a bearing portion having a longitudinal extent, a lower boundary wall, an upper boundary wall and two lateral boundary walls, wherein the boundary walls extend in longitudinal extent, with a working area at one end of the bearing portion in the direction of the longitudinal extent and with a butt for receiving tensile forces at the other end of the bearing portion in the direction of the longitudinal extent, which projects beyond the bearing portion and extends at least partially parallel to the longitudinal extent.

Furthermore, the invention relates to a needle bar having a body, a needle holder attached to the body, having grooves formed between webs, the webs being interconnected by a base and a fixing layer being disposed between the base and the body.

Such a knitting needle and such a needle bar are made DE 44 14 703 C2 known.

When producing a knitted fabric in a warp knitting machine, knitting tools of the same type must also be moved in the same way. Accordingly, similar knitting tools are arranged in a bar. When the bar is moved, the knitting tools are moved, thus ensuring that all knitting tools attached to the bar perform the same movement.

For positioning the knitting tools in the needle bar, it is known to provide a needle holder on the needle bar. The needle holder has a plurality of grooves, in which the knitting tools can be used. The knitting tools are supported by the two lateral boundary walls on the walls of the grooves. The grooves extend in the longitudinal extension of the knitting needles.

The knitting needles must be able to absorb certain tensile forces in a stitch forming operation. In order to prevent the tensile forces from displacing the knitting needles in the grooves, the knitting needles usually have a butt which extends beyond the lower boundary wall. This butt may enter into a depression on the body of the needle bar, as is apparent from the above DE 44 14 703 C2 is known.

However, this embodiment has the disadvantage that you need a corresponding groove in the body, which in particular presents certain problems when the body of the bar is formed from a carbon fiber reinforced plastic (CFRP). The formation of a corresponding groove is possible. However, the necessary tools wear out relatively quickly. The formation of the groove in the manufacture of the body of the needle bar by releasing corresponding areas is not always possible.

DE 12 34 351 B shows a latch needle with a foot connecting, elevated rear end portion for circular knitting machines, in which the rear end portion and the foot in the area corresponding to the outer, extended needle guide slot, both sides have pressed-out elevations. By these increases, a game between the bearing portion and needle guide slots can be kept very small.

US 2006/0010924 A1 shows a knitting tool bar in the form of a needle bar whose body is composed of three open profiles. On the body, a needle receptacle is provided which has grooves formed between webs. At one end of the grooves, which faces away from the free end of the body, a groove extending in the longitudinal direction of the body is provided into which a foot of a knitting needle can be inserted.

EP 1 770 193 A1 shows a knitting machine bar in the form of a needle bar, in which an auxiliary element forms a needle holder. This auxiliary element is glued to the body of the barre.

The invention has for its object to ensure a secure attachment of knitting needles in the needle bar with little effort.

This object is achieved with a knitting needle of the type mentioned above in that the needle foot projects laterally beyond a lateral boundary wall and forms a lateral projection for receiving the tensile forces.

The terms "upper boundary wall", "lower boundary wall" and "lateral boundary walls" are used here for clarity. They do not contain any restriction to an appropriate alignment of the knitting needle in the room. The alignment of the knitting needle in space results rather from the arrangement of the needle bar in a knitting machine.

The lower boundary wall is the boundary wall, with which the bearing portion of the knitting needle is inserted into the groove of the needle holder and which is then adjacent to the groove bottom. In many cases, the lower boundary wall forms a bearing surface, with which the bearing portion rests on the bottom of the groove of the needle holder. The upper boundary wall is the boundary wall on the opposite side of the body. The two lateral boundary walls are located between the upper boundary wall and the lower boundary wall. These are the Walls of the groove adjacent when the knitting needle is inserted into the needle holder. Although the needle foot still extends practically parallel to the longitudinal extent, the word "parallel" is not to be understood in the mathematically narrow sense, but it is laterally on a lateral boundary wall, so that the needle foot can now be supported on a bridge, the two adjacent grooves of the needle holder separates from each other. By this support the knitting needle is also held against tensile forces in the needle holder. One can then intercept at least a portion of the tensile forces on the web between the grooves of the needle holder, so that a supernatant of the needle butt on the lower boundary wall is no longer required to the extent, as was previously the case.

Preferably, the bearing portion has a width and the needle butt projects less than the width, preferably less than 0.8 times the width, across the sidewall. This results in a relatively small projection. By a suitable dimensioning of the height of the supernatant, so the extension between the upper boundary wall and the lower boundary wall, but you can ensure that the surface of the needle butt, which is supported on the needle holder and thus on the body, sufficient to those in the kneading process to absorb occurring tensile forces. The fact that the size of the supernatant is limited, there is no space problems, even if one arranges a plurality of knitting needles side by side in the needle holder.

Preferably, the needle foot is bent laterally. The needle butt is thus transformed so that he figuratively speaking has an S- or Z-shaped course. This easily achieves the lateral projection over the lateral boundary wall.

It is preferred that a slot is provided between the needle foot and the bearing portion. You can then deform the needle foot without mitverformen the bearing section accordingly.

Preferably, the slot is perpendicular to the lower boundary wall. This results in a simple way to the working area facing surface of the needle butt, which is perpendicular to the longitudinal extent and thus perpendicular to the tensile forces occurring in the kneading process.

Preferably, the needle foot protrudes beyond the lower boundary wall. This supernatant can be formed significantly lower than was previously the case. By overhanging the lower boundary wall, however, the area with which the needle foot can be supported on the body of the barre increased.

Preferably, the needle foot has a thickening. Even with a thickening, which may also be provided in addition to the above Abkröpfen, it is possible to provide a corresponding support of the needle butt in the web, which separates adjacent grooves in the needle holder from each other.

In a preferred embodiment, the thickening is at least partially formed by a material application. For example, it is possible to apply an adhesive, welding or soldering point to the butt of the needle.

Alternatively or additionally, the thickening may be at least partially formed by a deformation. The deformation can consist of upsetting or embossing. Regardless of the type of deformation is obtained a lateral projection of the needle butt over at least one of the lateral boundary walls.

The thickening may also be partially or partially formed by a joining element. A joining element may be, for example, a rivet or a screw or simply a pin.

In a preferred embodiment, it is provided that a retaining lug is provided on the end remote from the needle foot of the bearing portion, which protrudes beyond the lower boundary wall. This can secure the knitting needles in the longitudinal direction in two opposite directions against movement.

It is preferred that the retaining lug protrudes further than the needle butt over the lower boundary wall. In the area of the retaining lug, the body is usually at the end, so that one can also use a larger retaining lug without having problems in the formation of the body.

The object is achieved by a needle bar having a body, a needle receptacle attached to the body, which has grooves formed between webs, wherein the webs are interconnected by a base and between the base and the body, a fastening layer is arranged, and at least one knitting needle, as described above, wherein the needle butt has a projection over the lower boundary wall which corresponds at most to the sum of the thicknesses of the base and the attachment layer.

In this embodiment, an engagement in the body of the bar by a machining tool is practically no longer necessary. The space required for the needle butt may be provided by the base and the attachment layer. The attachment layer may be, for example, an adhesive layer. In such an embodiment, a processing of the body is not required. Should one Deepening required, then this can already be realized in the production of the original form, because here no contact surfaces for the butt must be made.

It is also preferred that the retaining lug projects beyond the lower boundary wall by more than the sum of the thicknesses of the base and the fastening layer. This makes it possible to rest the retaining lug directly on the body.

Fig. 1

eine Wirknadel in Seitenansicht,

Fig. 2

eine Draufsicht auf die Wirknadel in Richtung auf einen Nadelfuß,

Fig. 3

eine vergrößerte Darstellung des Nadelfußes der Wirknadel nach Fig. 1,

Fig. 4

eine Schnittansicht einer Nadelbarre mit einer abgewandelten Form einer Wirknadel,

Fig. 5

eine perspektivische Darstellung einer Nadelbarre,

Fig. 6

eine abgewandelte Ausführungsform einer Nadelbarre und

Fig. 7

eine perspektivische Darstellung der Nadelbarre nach Fig. 6.

It is also preferred that the needle receptacle has a recess extending transversely to the grooves and the grooves continue beyond the recess with a discharge section. This has the advantage that you can set the knitting needles beyond the recess still in the outlet section. Producing the grooves with a tool, such as a side-milling cutter, is simplified because there is enough space for the side-milling cutter to work. The invention will be described below with reference to preferred embodiments in conjunction with the drawing. Herein show:

Fig. 1

a knitting needle in side view,

Fig. 2

a plan view of the knitting needle in the direction of a needle foot,

Fig. 3

an enlarged view of the butt of the knitting needle after Fig. 1 .

Fig. 4

a sectional view of a needle bar with a modified form of knitting needle,

Fig. 5

a perspective view of a needle bar,

Fig. 6

a modified embodiment of a needle bar and

Fig. 7

a perspective view of the needle bar after Fig. 6 ,

An effect needle 1 has a bearing section 2. The bearing section 2 is a section of the knitting needle 1, with which the knitting needle 1 in grooves of a needle holder 3 (FIG. Fig. 5 ) is used. The bearing section 2 has a lower boundary wall 4, an upper boundary wall 5 and two lateral boundary walls 6, 7. All boundary walls 4-7 extend in the longitudinal extension of the knitting needle. 1

The terms "lower boundary wall 4", "upper boundary wall 5" and "lateral boundary wall 6, 7" have been used here for clarity. They refer to the representation of the knitting needle 1 in Fig. 1 , However, they do not define an absolute alignment of the knitting needle 1 in space. This orientation depends on a later use of the knitting needle 1 in a knitting machine.

Like from the 4 and 5 can be seen, the knitting needles 1 are used for use in a needle holder 3 a needle bar 8. Each groove is bounded by two webs 9, 10. The two lateral boundary walls 6, 7 are, when the knitting needle 1 is inserted into a corresponding groove, parallel to the webs 9, 10 and are held by the webs 9, 10. The lower boundary wall 4 is a groove base 11 ( Fig. 4 ) adjacent and is often on the groove base 11 at. The upper boundary wall 5 projects out of the groove or is directed towards the open end of the groove.

The knitting needle 1 has a working area 12 with a hook 13. At the other end (based on the longitudinal extension of the knitting needle 1), the knitting needle 1 has a needle foot 14, which is separated from the bearing section 2 by a slot 15. The slot 15 extends substantially perpendicular to the longitudinal extent, so that the needle foot 14 has a working area 12 facing the front 16, which is perpendicular to the longitudinal extent. The needle foot 14 can be supported with this front side 16 on the needle holder 3, as will be explained in more detail below.

The butt 14 is as shown in the Fig. 1 and 2 can be seen, about the lower boundary wall 4 something about. However, this projection can be kept relatively small, because the needle butt 14 also projects laterally beyond the lateral boundary wall 6 (see Fig. 2 ). The butt 14 is thus S- or Z-shaped out, or in other words, bent. The front side 16 of the needle butt 14 is thus no longer covered by the bearing section 2 in the longitudinal direction.

It is shown that the needle foot 14 projects beyond the lateral boundary wall 6. But it is also possible that it overcomes the other lateral boundary wall 7. It can also survive over both lateral boundary walls.

The needle foot can now be supported on an end face of a web 9, 10 and thus absorb tensile forces acting in the longitudinal direction. This prevents that the knitting needle 1 is pulled out of the needle holder 3. Due to the lateral projection of the needle butt 14, a surface is provided on the front side 16 of the butt 14, which can absorb the forces. The projection of the butt 14 over the lower boundary wall 4 can thus be reduced by this area. In many cases, this supernatant can even be completely eliminated.

The lateral projection over the lateral boundary wall 6 corresponds at most to the width of the bearing section 2. It is even advantageous if the projection is smaller than the width of the bearing section 2, for example, at most 0.8 times the width of the bearing section 2 corresponds.

In addition to the in Fig. 2 shown bend of the needle butt 14 you can realize the lateral projection in another way. For example, it can be provided that the needle foot 14 has a thickening. This thickening may for example be formed at least partially by a material application, for example an adhesive, welding or soldering point. Alternatively or additionally, the thickening may also be formed at least partially by a deformation. A deformation can be done for example by embossing or upsetting or bending. Alternatively or additionally, the thickening may also be formed at least partially by a joining element.

The 4 and 5 now show a knitting needle 1 (in Fig. 4 in a slightly modified form) inserted into the needle holder 3.

The 4 and 5 show the needle bar 8 with a body 17, which is mainly formed of a carbon fiber reinforced plastic (CFRP). On the body 17, the needle holder 3 is glued. An attachment layer 18 may be formed, for example, as an adhesive layer for this purpose.

How to get in Fig. 4 can recognize the knitting needle 1 is located with its lower boundary wall 4 on the groove base 11 of the needle holder. The needle holder has a base 19, with which the individual webs 9, 10 are connected to each other. This base 19 has a certain thickness, which however can be very small.

The projection of the needle foot 14 on the lower boundary wall 4 is smaller than the sum of the thicknesses of the attachment layer 18 and base 19, so that you can provide the body 17 with a flat support surface 20 for the needle holder 3. This makes the manufacture of the body 17 relatively easy.

In the Fig. 4 shown knitting needle has at the end of the bearing portion 2, which faces the working area 12, a retaining lug 21 which protrudes so far beyond the lower boundary wall 4 of the knitting needle 1 that they can be supported on the body 17 when the knitting needle 1 in the needle holder. 3 is used. The retaining lug 21 is therefore longer than the sum of the thicknesses of the attachment layer 18 and the base 19.

The 6 and 7 show modified embodiments of a needle bar, wherein the same elements are provided with the same reference numerals.

In the embodiment of the 6 and 7 the support surface 20 is provided with a recess 22 which is arranged where, in the mounted state, the needle foot 14 of the knitting needle 1 is located. Again, however, it is provided that the supernatant of the needle butt 14 via the lower boundary wall 4 corresponds at most to the thickness of the base 19 and attachment layer 18. However, one can provide the base with an extension 23 which projects beyond the butt 14, and provide in the extension 23 a recess 24 in the form of a transverse to the longitudinal extension of the knitting needle 1 groove in which the needle butt 14 is supported in the longitudinal direction in both directions is. The extension 23 may have a slightly greater thickness at the end of the needle butt 14, which faces away from the working area 12, than in the area of the bearing section 2 of the knitting needle 1.

In such an embodiment, a retaining lug 21 on the knitting needle 1 is not absolutely necessary. However, it can also be provided here.

The design after Fig. 7 corresponds essentially to the embodiment Fig. 6 with the difference that the grooves of the needle holder 3 extend beyond the recess 24 and beyond the recess 24 have a discharge portion 25, in which a over the needle butt 14 in a direction away from the working area 12 facing supernatant can occur.

The outlet section has essentially manufacturing advantages. For the holder of the knitting needle 1 in the needle holder 3, it is not essential.

Claims (15)

1. Knitting needle (1) comprising a bearing section (2) provided with a longitudinal extension, a lower boundary wall (4), an upper boundary wall (5) and two lateral boundary walls (6, 7), wherein the boundary walls (4-7) extend along the longitudinal extension, with a working area (12) at one end of the bearing section (2) in the direction of the longitudinal extension and with a needle bottom (14) to absorb tensile forces on the other end of the bearing section (2) in the direction of the longitudinal extension, which protrudes from the bearing section (2) and runs at least partially parallel to the longitudinal extension, characterised by the fact that the needle bottom (14) protrudes laterally from at least one lateral boundary wall (6, 7), thereby forming a lateral protrusion to absorb the tensile forces.
2. Knitting needle according to claim 1, characterised by the fact that the bearing section (2) has a width and the needle bottom (14) protrudes from the lateral boundary wall (6, 7) by less than said width, preferably by less than 0.8 times the width.
3. Knitting needle according to claim 1 or 2, characterised by the fact that the needle bottom (14) is laterally bent.
4. Knitting needle according to claim 3, characterised by the fact that a slot (15) is provided between the needle bottom (14) and the bearing section (2).
5. Knitting needle according to claim 4, characterised by the fact that the slot (15) runs perpendicular to the lower boundary wall (4).
6. Knitting needle according to any one of claims 1 to 5, characterised by the fact that the needle bottom (14) protrudes from the lower boundary wall (4).
7. Knitting needle according to any one of claims 1 to 6, characterised by the fact that the needle bottom (14) is provided with a thickening.
8. Knitting needle according to claim 7, characterised by the fact that the thickening is at least partially formed by a material application.
9. Knitting needle according to claim 7 or 8, characterised by the fact that the thickening is at least partially formed by deformation.
10. Knitting needle according to one of claims 7 to 9, characterised by the fact that the thickening is at least partially formed by a mating element.
11. Knitting needle according to any one of claims 1 to 10, characterised by the fact that a retaining collar (21) is provided at the end of the bearing section (2) facing away from the needle bottom (14), which protrudes from the lower boundary wall (4).
12. Knitting needle according to claim 11, characterised by the fact that the retaining collar (21) protrudes further than the needle bottom (14) from the lower boundary wall (4).
13. Needle bar (8) comprising a body (17), a needle holder (3) fastened to the body, having grooves formed between supports (9, 10), wherein said supports (9, 10) are interconnected by means of a base (19) and a fastening layer (18) is arranged between the base (19) and the body (17), and at least one knitting needle (1) according to any one of claims 1 to 12, characterised by the fact that the needle bottom (14) has a protrusion from the lower boundary wall (4) equivalent at most to the sum of the thicknesses of the base (19) and the fastening layer (18).
14. Needle bar according to claim 13, characterised by the fact that the retaining collar (21) protrudes from the lower boundary wall (4) by more than the sum of the thicknesses of the base (19) and the fastening layer (18).
15. Needle bar according to claim 14 or 15, characterised by the fact that the needle holder (3) comprises a recess (24) extending transversely to the grooves and said grooves continue beyond the recess (24) with an outlet section (25).

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