EP2078773B1 - Cartridge of a knitting machine - Google Patents

Description

The invention relates to a cassette which can be fastened to the needle bed of a knitting machine, and to a knitting machine with such a cassette.

Since there are flat knitting machines, there is a risk that the mesh images, which protrude from the stitch-side longitudinal side of the needle bed, are damaged in yarn guide or needle collisions. This has initially led to the mesh images are no longer formed frästechnisch on the stitch-side longitudinal side of the needle bed, but are inserted as a separate component in the stitch-near longitudinal side of the needle bed.

In the case of prior art needle beds, defective parts of the stitch forming area may be exchanged. The process of exchange is not easy and requires a considerable amount of time.

The Fig. 1a shows a section of the mesh image area of a needle bed 1 "according to the prior art in a view from above of the needle bed 1".

The Fig. 1b shows the stitching area of the needle bed 1 "in a sectional view along the line AA Fig. 1a ,

In the needle bed 1 ", the needles 50 are guided in the groove 11". The mesh images 70 get their height fiung in the groove 13 "of the needle bed 1". The hold-down boards 80 are located in a similar position on the stitch-side longitudinal side of the needle bed 1 "as the stitches 70 and are therefore at risk of being damaged The stitches 70 and hold-down boards 80 are fixed in position in the needle bed 1" by the same round bar 60 , For the mesh images 70, the round bar 60 forms the fixation of its position to the stitch-side longitudinal side of the needle bed 1 "and for the hold-down boards 80 additionally forms the axis about which the hold-down boards 80 make their pivotal movements must be and these are disadvantageously in the middle of the needle bed 1 ", the round rod 60 must be pulled laterally at least half its length from the needle bed 1" Also at least half its length must be the tee-off edge forming round wire 90 laterally from the needle bed 1 ", since it is circular-hole-shaped from the mesh images 70 and long hole-shaped from the hold-down plates 80. Frequently, the round wire 90 has been given a kink by deformed stitch patterns 70 and therefore can not be pulled out through the holes of the stitch patterns 70 and hold down plates 80 in one direction. In this case, the round wire 90 must be severed before and after the kink so that it can be removed therefrom at both ends of the needle bed 1. As soon as the round bar 60 and the round wire 90 are pulled out of the needle bed 1 ", they lose the mesh images 70 and the hold-down plates 80, which have no contact with the round rod 60 and the round wire 90, their exact fixation and are in an indifferent position in the needle bed 1 "This indifferent position of the mesh images 70 and hold-down boards 80 complicates the insertion of the Round bar 60 in the needle bed 1 "when the damaged mesh images 70 and / or hold-down boards 80 are replaced by functional, because with each stitch pattern 70 and each hold-down plate 80, the rod 60 must slide through the fixing hole. The insertion of the round wire 90 is due to its small diameter and the corresponding small holes in the mesh images 70 also difficult.

Object of the present invention is therefore to remedy this situation and in particular to allow easier replacement of damaged elements of the stitch formation area.

This object is achieved according to the invention by a cassette which is detachably fastened to the needle bed of a knitting machine and has at least one active element required for stitch formation. In this case, preferably each knitting tool, in particular each needle, a cassette assigned. The cassettes can be attached to the needle bed independently of a round bar or round wire. For example, knitting elements needed for the stitch formation can be a stitch pattern and / or a knock-off edge.

Particular advantages arise because the cassette is releasably attachable to the needle bed. This creates the opportunity to exchange individual cartridges that have damaged active elements. It is not necessary to first remove a round rod or round wire which is in contact with all the active elements before a damaged active element can be exchanged. The repair and repair of a knitting machine can thus be done much faster.

It is particularly preferred if the cassette can be locked on the needle bed. By a locking connection, a particularly simple and reliable attachment to the needle bed can be made. In addition, a locking connection is usually easily solvable, so that a replacement of a cassette can be done quickly.

Further advantages result if the cassette can be attached to the needle bed without tools and / or can be detached from the needle bed. This also makes it possible to speed up the replacement of a cassette. The attachment or removal of the cassette on the needle bed can therefore be done without technical aids. This makes it possible to provide the needle bed only with grooves and cutouts, which are needed for guiding and storing the knitting tools and the cassettes. Additional fasteners need not be provided on the needle beds. In particular, no threads need to be cut to secure the cassettes to the needle bed.

In one embodiment of the invention it can be provided that the cassette has a stitch pattern and / or a knock-off edge. As a result, these elements do not have to be formed separately on the needle bed.

Further advantages result if the cassette has at least one knitting element which facilitates the stitch formation. In particular, the cassette may have a hold-down plate and / or a mesh wiper and / or a yarn feeder. It is also possible to store combinations of said elements in the cassettes.

According to one embodiment of the invention, provision can be made for the cassette to have at least one side plate which comprises or is at least partially designed as an active element needed for stitch formation. In particular, two side plates may be provided which contain the active elements needed for stitch formation.

Furthermore, it can be provided that a stitch pattern is formed on a first side panel and a knock-off edge on a second side panel. Between the side plates knitting elements can be arranged, which favor the stitch formation. A particularly simple embodiment of a knock-off edge is obtained when bolts are arranged on the side plates as a knock-off edge.

Between two side plates, a hold-down board may be arranged, which in turn is disposed on a slider which is movable relative to the side plates.

According to a preferred embodiment of the invention can be provided that a side plate has a portion with which it can be arranged in a guide of the needle bed. By this measure, the cassette can be fixed in position to its correspondence needle in the needle bed.

For fixing to the needle bed, the cassette may have a spring leg with a notch. In this case, the spring leg with its notch may comprise a round rod which is mounted in a groove of the needle bed. As a result, the cassette can be fixed in relation to the needle bed longitudinal side. Furthermore, it can be provided that the side plates of the cassette are connected by means of bolts and a slide movable in the cassette is guided by the bolts.

In the scope of the invention also a knitting machine with at least one needle bed and relative to the needle bed movable knitting tools, in particular needles, wherein each knitting tool is associated with a cassette according to the invention. In such a knitting machine, damaged active elements can be exchanged particularly easily by exchanging the cassettes in which the active elements are arranged. The replacement of one cartridge can be done without any impact on another cartridge.

In order to be able to arrange the cassettes exactly with respect to the associated needles on the needle bed, it is advantageous if the needle bed has guides for the cassettes. This defines the position of the cartridges.

In order that the cassettes and needles do not interfere with each other, it is advantageous if the guides for the cassettes and guides for the needles are parallel at least in a stitch formation area.

At the needle bed recesses may be provided for impact noses arranged in the cassette hold-down. The recesses may be arranged perpendicular to a plane of the needle bed extending in the longitudinal direction of the needle bed. In this case, the front end of the cutout can be widened. In this widening, the cassette can be guided laterally in the area of the needle bed that is closest to the stitching.

At the needle bed, a height fixing stop for the cassettes can be provided. In particular, a stepped surface can be provided for this, which extends parallel to a plane in the longitudinal direction of the needle bed. Further advantages arise when at least one needle is guided laterally by two cassettes. Thus, the needle can be additionally guided laterally.

As already mentioned, it is particularly advantageous if the cassettes are locked on the needle bed. As a result, they can also be easily removed from the needle bed so that they can be replaced if necessary.

An alternative mounting option of the cassettes is that they are fixed by means of a wedge-shaped strip on the needle bed.

At the needle bed, a knock-off edge may be provided. In particular, it may be formed on the needle bed.

Further features and advantages of the invention will become apparent from the following detailed description of embodiments of the invention, with reference to the figures of the drawing, which show details essential to the invention, and from the claims. The individual features may be implemented individually for themselves or for a plurality of combinations in variants of the invention.

In the schematic drawing an embodiment of the invention is shown and explained in more detail in the following description.

Fig. 1a

einen Ausschnitt des Maschenbildungsbereichs eines Nadelbetts gemäß dem Stand der Technik in einer Ansicht von oben;

Fig. 1b

eine Schnittdarstellung gemäß der Linie A-A der Fig. 1a;

Fig. 2a

eine Ansicht von oben auf einen Ausschnitt eines Maschenbil- dungsbereichs eines Nadelbetts, in dem Kassetten gelagert wer- den können;

Fig. 2b

eine Schnittdarstellung gemäß der Linie B-B der Fig. 2a;

Fig. 3

ein Nadelbett, welches Kassetten aufweist;

Fig. 4

eine Schnittdarstellung gemäß der Linie C-C der Fig. 3;

Fig. 5a

einen Ausschnitt eines Maschenbildungsbereichs eines Nadelbetts für eine alternative Ausgestaltung einer Kassette;

Fig. 5b

eine Schnittdarstellung gemäß der Linie D-D der Fig. 5a;

Fig. 6

eine der Fig. 4 entsprechende Ansicht mit einer alternativen Aus- gestaltung einer Kassette;

Fig. 7a - 7d

die Bestandteile einer ersten Ausführungsform einer Kassette;

Fig. 8a - 8d

in perspektivischer Darstellung das Zusammenfügen der Einzel- teile für eine Kassette gemäß einer ersten Ausführungsform.

Show it:

Fig. 1a

a section of the stitching area of a needle bed according to the prior art in a view from above;

Fig. 1b

a sectional view along the line AA of Fig. 1a ;

Fig. 2a

a view from above of a section of a stitch forming area of a needle bed, in which cassettes can be stored;

Fig. 2b

a sectional view along the line BB of Fig. 2a ;

Fig. 3

a needle bed having cassettes;

Fig. 4

a sectional view along the line CC of Fig. 3 ;

Fig. 5a

a section of a stitching area of a needle bed for an alternative embodiment of a cassette;

Fig. 5b

a sectional view along the line DD of Fig. 5a ;

Fig. 6

one of the Fig. 4 corresponding view with an alternative design of a cassette;

Fig. 7a - 7d

the components of a first embodiment of a cassette;

Fig. 8a - 8d

in a perspective view the assembly of the individual parts for a cassette according to a first embodiment.

Fig. 2a 11 shows a section of a stitching area of the needle bed 1 in which the cassettes 2 corresponding to a first embodiment of the invention, which contain the elements required for stitch formation, are stored in a view from above onto the needle bed 1.

Fig. 2b shows the area of the needle bed 1 in which the cassettes 2 are stored, in a view according to the section BB of Fig. 2a ,

The needle bed 1 contains the grooves 18, in which the needles 50 are mounted, which are visible only in the area shown, but extend beyond the stitch formation area at right angles to the needle bed longitudinal side over the entire width of the needle bed. In the stitch formation area, the grooves 11 are made parallel to the grooves 18. In them, the cassettes 2 ( Fig. 3 . Fig. 4 ) fixed in position to the needle 50. The recesses 12 which run perpendicular to the needle bed plan side, ie a plane in the longitudinal direction of the needle bed 1, form the free space for the active nose of the hold-down plate 23 (FIG. Fig. 3 . Fig. 4 ), which is integrated in the cassette 2. The front end 13 of the recess 12 is widened. In this widening, the cassette 2 receives its lateral guidance in the mesh-forming region of the needle bed 1. The groove 14 extending over the entire length of the needle bed 1 takes the round rod 6 (FIG. Fig. 4 ) on which the cassette 2 receives its fixation with respect to the needle bed longitudinal side. On the over the entire length of the needle bed 1 reaching flat surface 15 is the cassette 2 with its side plate 21 (FIG. Fig. 3 . Fig. 4 ) on. The stepped surface 16, which runs parallel to the plane surface 15 over the entire length of the needle bed 1, is the contact surface for the height fixing of the cassettes 2 in the mesh-forming region of the needle bed 1 and therefore forms a height fixing stop.

Fig. 3 shows the needle bed 1, equipped with the cassettes 2 according to a first embodiment. The stored in the needle bed 1 cassettes 2 have side plates 21, 22, which contain the necessary for the stitch formation active elements. Between the side plates 21, 22 active elements are arranged, which favor the stitch formation. In a first embodiment of a Cassette 2 is formed on the side plate 21 of the mesh images 210 and on the side plate 22, the tee edge 220. Between the side plates 21, 22 in the slide 24 pivotally mounted hold-down plate 23 is arranged. The needle 50 receives in the stitching area an additional lateral guidance through the cassettes 2, which are located to the left and right of the needle.

Fig. 4 shows the stitching area of the needle bed 1 with a cassette 2 according to a first embodiment in a view according to the section CC of Fig. 3 ,

The side plate 22 protrudes with its portion 223 and the spring leg 221 in the guide groove 11 of the needle bed 1. As a result, the cassette 2 is fixed in position to its correspondence needle. The spring leg 221 of the side plate 22 includes with its notch 222 partially the round bar 6, which is mounted in the groove 14 of the needle bed 1 and thereby fixes the cassette 2 with respect to the needle bed longitudinal side. The laterally projecting from the side plate 22 bolt 220 forms the tee edge for his correspondence needle and extends to the outside of the side plate 21 of the subsequent cassette. The spring leg 221 is locked on the round rod 6. Since the spring leg 221 is deflectable against a restoring force, it can be deducted from the round rod 6. For replacement of the cassette 2, the round rod 6 therefore does not have to be removed. The side plate 21 of the cassette 2 rests with its surface 211 on the surface 15 of the needle bed 1 and thus determines the height position of the cassette 2 to the needle 50. The nose 212 of the side plate 21 abuts the surface 16 of the needle bed 1 and forms The slope at the front of the side plate 21 is the stitch pattern 210. On the bolts 25 and 26, which engage in the side plates 21, 22, slides the slider 24 when he by cam curves, not shown on section 243rd is charged. The bolts 25, 26 also form the connection of the side plate 21 with the side plate 22. The hold-down plate 23 is pivotally mounted in the slider 24 and therefore can perform pivotal movements when it is acted upon by non-illustrated cam tracks on the section 232. With the nose 230 of the hold-down plate 23, the mesh, which is in the stitch formation in the needle hook, are retained when the needle 50 executes its ejection movement.

In the preferred embodiment shown, each cassette 2 can be inserted independently of other cassettes in a movement in their guide groove 11 in the needle bed 1, in which the spring leg 221 snaps with its notch 222 on the rod 6 and automatically fixes the cassette. The locking configuration shown is one of many Verrastungsmöglichkeiten with which the cassette 2 in the needle bed 1 can be fixed. It is also conceivable that all the cassettes 2 of the needle bed 1, which are inserted into their guide groove 11, are fixed with a wedge-shaped strip whose profile is encompassed by a groove in each cassette 2 and a groove extending in the needle bed 1 over the entire length of the needle bed ,

Fig. 5a shows a section of the stitch-forming region of the needle bed 1 ', in which the cassettes 2' corresponding to a further embodiment, which contain the elements necessary for the stitch formation are stored, in one of Fig. 2a corresponding view.

Fig. 5b shows the area of the needle bed 1 ', in which the cassettes 2' are stored, in a view according to the section DD of Fig. 5a ,

The needle bed 1 'has on its longitudinal side, on which the stitch formation happens, before each Nadelelnut 18' the tee edge 19. Otherwise corresponds to the contour and the groove of the needle bed 1 'of the needle bed 1. Components that correspond to those of the previous figures have same reference number with trailing '.

Fig. 6 shows the stitching area of the needle bed 1 'with a cassette 2' according to another embodiment in one of Fig. 4 corresponding view. The cassette 2 'does not have the abutment edge forming bolt 220 (FIG. Fig. 4 ), because the tee edge 19 is formed for each needle 50 through the needle bed 1 '.

Otherwise, the cassette 2 'in its structure, its functionality and in its storage in the needle bed 1' identical to the cassette. 2

Fig. 7a - 7d show the flat components from which the cassette 2 is formed according to a first embodiment.

evidenced Fig. 7a the side plate 21 lies with its surface 211 on the needle bed 1 and therefore determines the height position of the cassette 2 to the needle 50. The nose 212 engages around the surface 16 of the needle bed 1 and forms the height fixing of the cassette 2. The at the front of the side plate 21st formed bevel 210 is the stitch pattern, which is a necessary for the stitch formation active element. The bores 214 and 215 receive the bearing bolts for the slider 24. The distance nubs 216 form the gap which is needed between the side plates 21, 22 so that the slider 24 can perform its sliding movement and the hold-down plate 23 their pivotal movement.

evidenced Fig. 7b the slider 24 is guided in the slots 240, 241 on the bearing pin, not shown, and can perform by moving its section 243 horizontal movements. In the circle segments 242, the hold-down plate 23 is mounted.

evidenced Fig. 7c the hold-down plate 23 is mounted with its circular portion 231 in the slider 24 and can perform pivotal movements by applying the portion 232. The hold-down plate 23 with its nose 230 is the active element, which favors the formation of stitches.

evidenced Fig. 7d engages the side plate 22 with its portion 223 and its spring leg 221 in the guide groove 11 of the needle bed 1. The notch 222 of the spring leg 221 is located on the round bar 6 of the needle bed 1 at. The side plate 22 thereby determines the position of the cassette 2 to its correspondence needle and stitch-forming longitudinal side of the needle bed 1. The bores 224 and 225 take the bearing pin for the slider 24. Of the Bolt 220 is permanently connected to the side plate 22 and forms the knock-off edge for the correspondence needle, ie the needle assigned to the cassette 2. The knock-off edge is the necessary for the stitch formation active element. The active element mounted between the side plates 21, 22 of the cassette 2, which promotes stitch formation, in the illustrated embodiments of the invention is the hold-down plate 23, which is pivotally mounted in the horizontally displaceable slide 24. This configuration of a hold-down plate 23 is only an example of active elements mounted in the cassette 2, which favor the formation of stitches. In the cassette 2, all conceivable hold-down boards, in particular those whose movements are composed of different directions of movement, are stored. Hold down plates, in which a direction of movement is initiated by the force of a spring, can be stored in the cassette 2 so that the spring can be supported in the cassette 2. In addition, in the cassette 2 other, the stitch formation favoring active elements are stored, for. As mesh scraper, which from their correspondence needle, the stitch that must slide over the needle hook strip, or thread assignment elements, which assign the thread of her needle in a position so that it can be reliably detected by the needle hook. With appropriate design several different active elements can be stored in the cassette, which favor the mesh formation in their special effectiveness.

Fig. 8a - 8d show a perspective view of the assembly of the items for a cassette 2, according to a first embodiment of the invention. In the side plate 21, the bolts 25, 26 are inserted ( Fig. 8a ). The slide 24 is flat against the side plate 21 and its slots 240, 241 comprise the bolts 25, 26 (FIG. Fig. 8b ). The hold-down plate 23 is inserted with its arcuate portion 231 in the circular segments 242 of the slider 24 ( Fig. 8c ). The side plate 22 comes to rest on the spacer knobs of the side plate 21 and includes with their bores 224, 225, the bolts 25, 26 (FIG. Fig. 8d ). About the bolts 25, 26, the two side plates 21, 22 are interconnected.

Claims (21)

1. Cassette (2, 2') that is mounted detachable at the needle bed (1, 1') of a knitting machine and is provided with at least one operative element that is required for forming a knitting stitch.
2. Cassette according to claim 1, characterized by, that the cassette (2, 2') can be snapped in at the needle bed (1, 1').
3. Cassette according to one of the preceding claims, characterized by, that the cassette (2, 2') can be fastened at the needle bed (1, 1') and/or detached from the needle bed (1, 1') without any tools.
4. Cassette according to one of the preceding claims, characterized by, that the cassette (2, 2') is provided with a stitch generator (210, 210') and/or is provided with a bind-off edge (220).
5. Cassette according to one of the preceding claims, characterized by, that the cassette (2, 2') is provided at least with one operative element that makes stitch generation easier.
6. Cassette according to claim 5, characterized by, that the cassette is provided with a hold-down plate (23) and/or a stitch stripper and/or a thread allocator.
7. Cassette according to one of the preceding claims, characterized by, that the cassette (2, 2') is provided with at least one lateral plate (21, 22) that comprises an operative element that is required for generating stitches or is designed as such at least partially.
8. Cassette according to claim 7, characterized by, that at a first lateral plate (21) a stitch generator (210, 210') and at a second lateral plate (22), a bind-off edge (220) is formed.
9. Cassette according to one of the preceding claims 7 or 8, characterized by, that a hold-down plate (23) is located between the lateral plates (21, 22).
10. Cassette according to one of the preceding claims 7 to 9, characterized by, that a lateral plate (22) is provided with a section (223) by means of which it can be mounted in a guide of the needle bed (1, 1').
11. Cassette according to one of the preceding claims 7 to 10, characterized by, that the lateral plates (21, 22) of the cassette are connected by means of bolts (25, 26) and a slider (24) that is displaceable in the cassette (2, 2') is guided by bolts (25, 26).
12. Cassette according to one of the preceding claims, characterized by, that the cassette (2, 2') for fixation at the needle bed (1, 1') is provided with a spring bracket (221) with a notch (222).
13. Knitting machine with at least one needle bed and knitting tools that are displaceable relative to the needle bed, whereby each knitting tool (50) is associated with a cassette (2, 2') according to one of the preceding claims.
14. Knitting machine according to claim 13, characterized by, that the needle bed (1, 1') is provided with guides for the cassettes (2, 2').
15. Knitting machine according to one of claims 13 or 14, characterized by, that the guides for the cassettes (2, 2') and guides for the needles extend parallel at least in a stitch generating section.
16. Knitting machine according to one of the preceding claims 13 to 15, characterized by, that cut outs (12) for the operative catches of the hold-down plates (23) that are located in the cassettes are provided at the needle bed (1, 1').
17. Knitting machine according to one of the preceding claims 13 to 16, characterized by, that at the needle bed (1, 1') a height fixation stop is provided for cassettes (2, 2').
18. Knitting machine according to one of the preceding claims 13 to 17, characterized by, that at least one needle (50) is guided laterally by two cassettes (2, 2').
19. Knitting machine according to one of the preceding claims 13 to 18, characterized by, that the cassettes (2, 2') are snapped in at the needle bed (1, 1').
20. Knitting machine according to one of the preceding claims 13 to 18, characterized by, that the cassettes (2, 2') are fixated at needle bed (1, 1') by means of a wedge-shaped bar.
21. Knitting machine according to one of the preceding claims 13 to 20, characterized by, that a bind-off edge (19) is provided at the needle bed (1, 1').

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