EP3128055B1 - Cam system for a flat knitting machine and flat knitting machine - Google Patents

Description

The invention relates to a lock system for a flat knitting machine with a first lock, the lock parts for realizing at least two lock functions of the lock functions "do not knit", "stitch", "catch", "transfer of stitches", "take over stitches" has. Moreover, the invention relates to a flat knitting machine with a lock system according to the invention.

In the production of knitted fabrics which are to be knitted very tightly, the problem often arises that when the needles are sprouted again, the previously formed course of stitches with the ejecting needles is pulled up. This can not be completely prevented by the use of hold-down boards.

To remedy this situation, it is known, the needles, which face the stitch forming needles to drive out a limited way, whereby they get between the stitch forming needles and thus form a kind of comb or rake, which covers the already formed fabric during the emergence of the needles or withholds. This process is called "masking".

A disadvantage of this approach is that the castle, which is used for covering, so "to cover" to perform the lock function, so far only limited is suitable to fulfill other functions in the knitting process.

From the EP 1 867 768 A1 is a device for improving the appearance of edge stitching at the end of a series of knitted fabric in a tubular knitted piece, which is formed on a flat knitting machine known. In order to avoid the contraction of the last stitch of a knitted fabric of the front or rear needle bed when changing to the other bed, after the carriage reversal next to the first needle of the new row of knitting on a needle bed and the last needle of the old knitting row of the opposite needle bed again expelled , However, it is not driven out so far that a thread insert can be made.

From the JP H03 59151 A For example, there is known a device for pressing a knit fabric which is produced on one of two opposing needle beds by means of needle beds of the respective other needle bed.

Object of the present invention is to provide a knitting system, which can fulfill both a variety of functions in the knitting process and is suitable for covering.

This object is achieved according to the invention by a lock system for a flat knitting machine having a first lock which "do not knit" lock parts to realize at least two lock functions of the lock functions, "stitching", "catching", "transferring stitches", "taking over stitches" wherein the first lock has at least one lock part for realizing a covering function, which is designed as a pusher part, which has contact surfaces in at least two different heights for cooperation with a foot of a slider or a needle. The lock can be moved with the aid of a carriage along the needle beds of a flat knitting machine.

A lock system with such a lock can thus be used for at least two lock or stitch forming functions. In addition, the lock can be used for covering. Unlike in the prior art, therefore, no separate lock is provided, which is primarily intended to cover, but an already known lock is modified so that in addition to usual knitting or lock functions and a cover function can be performed. With the lock system according to the invention, it is possible that a lock opposite the straight stitch-forming lock can drive out selected needles so far that they extend between the stitch-forming needles and thus exert a supporting or stripping / covering effect on the stitches located on these needles. The at least two lock functions can be selectable lock functions. in the first lock, apart from the function "strip / cover", at least two further selectable lock functions are available.

The needle used for covering can be withdrawn by means of a Austriebsschlossteils so far that the hook of the needle can not catch a thread. At the end of the lock, the Zwischenschieberfuß the intermediate slide can be pushed back and released in the area after a trailing trigger part again. Alternatively, it is conceivable that a needle to be covered with is expelled by means of a Austriebsschlossteils to catch level and is pushed in this position by means of a pusher the Zwischenschieberfuß an intermediate slide and thus the foot of a needle to half engagement height in the castle. Thus, the foot of the needle can be expelled at the catch level and run into this position in the remote in this area Austriebsschlossteil. By means of the Austriebsschlossteils the needle can be removed so far that they can no longer catch a thread.

The pusher part may have a lock center side contact surface which is higher than a lock outer side contact surface. As a result, it is possible to displace a foot of a slider or a needle to different degrees and thereby realize different lock functions.

Alternatively, it is conceivable that the pusher part has a central contact surface with a lower height than contact surfaces in outer regions of the pusher part. The middle contact surface is located in the middle of the castle. This also makes it possible, in particular to realize a covering function with the first lock of the lock system.

Through the use of switchable pusher parts certain needles can be selected, which are to be used for covering. It is thus not necessary, as is customary in the prior art, to drive out all needles for covering a piece. In particular, a Zwischenschieberfuß an intermediate slide of a needle, which is to be used for the function "cover", are pushed by a leading pusher part to half foot height and the needle can be driven by means of a leading trigger part. It can be ensured that this expulsion occurs significantly before the expulsion of the opposite needle, which expels to form stitches. Particular advantages arise when the first lock has at least one trigger part with a lock track. The castle track can be in particular a recess or a groove in the trigger part. This makes it possible to expel a needle, the needle foot enters the castle track to cover. In this case, only a deduction part may have such a lock track and be provided correspondingly an associated pusher part with contact surfaces at different heights. Thus, a cover function can be realized in a carriage movement direction and in the other carriage movement direction can be realized with a trigger part without Schlossbahn and a pusher part with a contact surface in only one height another function, such as a takeover function.

However, it is also conceivable to equip two trigger parts of the first lock with a lock track, so that in both carriage movement directions a covering function can be realized.

The withdrawal part can be movably arranged on the first lock. In particular, the lock part for performing a cover function be arranged in a retracted action position and arranged to perform a knitting function in an upper, comb-slit closer out-of-action position. By adjusting the trigger part, the desired flash height of the needles for masking can be set individually for each needle.

The lock system may have a second lock. The first and second locks can be moved together via a carriage. The second lock need not be designed to perform a cover function.

The first lock may have a Austriebsschlossteil with a lock curve for the realization of the lock function (s) "catch" and / or "covering". Thus, the expulsion lock member can not only be used to drive a needle completely to form stitches, but also to drive it out only partially for the lock functions "catch" and / or "cover".

According to a further development it can be provided that the outer contour of the Austriebsschlossteils at the height of the lower edge of the at least one trigger part has a distance X to the middle of the castle, which is greater than the distance Y of the outer contour at the level of a trigger member to Schlossmitte a Austriebsschlossteils of the second castle. The outer contour of the Austriebsschlossteils is thus shifted away from the middle of the castle to the outside. The lock is thus wider than a conventional lock.

To realize a transfer function, a trailing deduction part and an additional deduction part can be provided on the first lock. To realize the transfer function, all pusher parts be inactive. A needle can be driven out by means of a leading trigger part to a transfer position and then withdrawn by means of two trigger parts on the same position comb. The first lock may have a leading and a trailing trigger part. This makes it possible to perform several functions with the first lock. If one of the trigger parts has a lock track, a cover function can be realized in a carriage movement direction. If both trigger parts have a lock track, a cover function can be realized in both carriage movement directions. However, it is also conceivable that none of the trigger parts has a Schlossbahn. In this case, other measures must be taken to perform a cover. With the deduction parts can also be deducted needles that have been expelled, for example, to form a stitch or for the function "catch".

The first lock may have two outer pushers. With the contact surfaces of these two outer pusher parts feet of intermediate slides can be applied, so that in both carriage movement directions a covering function can be performed.

The outer pusher parts can be designed differently. In particular, one of the outer pusher parts can have only one contact surface with a uniform height for one foot of an intermediate pusher, while the other outer pusher part has contact surfaces at different heights. In this case, the first lock can be used only in a carriage moving direction to perform a capping function.

Even more functions can be performed by the first lock when the lock has two outer and one middle push piece.

The lock system may have a second lock. The first and second locks can be moved together via a carriage. The second lock need not be designed to perform a cover function.

A flat knitting machine with a lock system according to the invention also falls within the scope of the invention.

Such a flat knitting machine may further comprise knitting needles and intermediate shifters cooperating therewith, the intermediate shifters each having a foot for cooperation with the pusher parts. As a result, individual needles can be selected for different knitting functions. In addition, the needles can be selected to perform a masking function.

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 shows essential to the invention, and from the claims. The features shown there are not necessarily to scale and presented in such a way that the features of the invention can be made clearly visible. The various features may be implemented individually for themselves or for a plurality of combinations in variants of the invention.

In the schematic drawing embodiments of the invention are shown in various stages of use and explained in more detail in the following description.

Fig. 1

eine Darstellung zur Erläuterung einer Abdeckfunktion;

Fig. 2

eine erste Ausführungsform eines Schlosssystems, wobei anhand der Fig. 2 die Funktion "abdecken" erläutert wird;

Fig. 3

die erste Ausführungsform eines Schlosssystems bei der Funktion "stricken";

Fig. 4

die erste Ausführungsform eines Schlosssystems bei der Funktion "Fang";

Fig. 5

die erste Ausführungsform eines Schlosssystems in leicht modifizierter Form für die Funktion "Übergabe";

Fig. 6

die erste Ausführungsform eines Schlosssystems bei der Funktion "Übernahme";

Fig. 6a

eine erste Ausführungsform eines Drückerteils;

Fig. 6b

eine zweite Ausführungsform eines Drückerteils;

Fig. 7

eine zweite Ausführungsform eines Schlosssystems bei der Funktion "Fang";

Fig. 7a

eine Seitenansicht eines Drückerteils;

Fig. 8

das Schlosssystem der zweiten Ausführungsform bei der Funktion "stricken";

Fig. 9

die zweite Ausführungsform eines Schlosssystems bei der Funktion "Übergabe";

Fig. 10

die zweite Ausführungsform eines Schlosssystems bei der Funktion "Übernahme".

Show it:

Fig. 1

a representation for explaining a cover function;

Fig. 2

a first embodiment of a lock system, wherein based on the Fig. 2 the function "cover" is explained;

Fig. 3

the first embodiment of a lock system in the function "knit";

Fig. 4

the first embodiment of a lock system in the function "catch";

Fig. 5

the first embodiment of a lock system in slightly modified form for the function "transfer";

Fig. 6

the first embodiment of a lock system in the function "takeover";

Fig. 6a

a first embodiment of a pusher part;

Fig. 6b

a second embodiment of a pusher part;

Fig. 7

a second embodiment of a lock system in the function "catch";

Fig. 7a

a side view of a pusher part;

Fig. 8

the lock system of the second embodiment in the function "knit";

Fig. 9

the second embodiment of a lock system in the function "transfer";

Fig. 10

the second embodiment of a lock system in the function "takeover".

The Fig. 1 shows a needle 20, which has been partially expelled by a first lock of a lock system, so that it is in a covering position. The needle 20 'was driven out in the knitting position by a second lock of a lock system. The needle 20 prevents a stitch located on the needle 20 'from being moved and expelled therewith. The needle 20 covers the fabric and holds it back.

The Fig. 2 shows a lock system 1, which has a first lock VS and a second lock HS. The second lock HS is a lock in the illustrated embodiment, as is common in the prior art.

The first lock VS has been modified in comparison to a known lock, so that it is suitable firstly for performing a covering function and secondly for carrying out at least two further functions of the lock in a knitting process. The first lock VS has outer pusher parts 30, 30 ', the contact surface 31 of the pusher part 30 leading in the direction of carriage movement S having a lower height than that in FIG The pusher part 30 'is correspondingly designed for a carriage movement direction opposite to the arrow direction S. This means that the contact surface 31' has a lower height than the contact surface 32 '. In a carriage movement in the direction of arrow S and active circuit of the pusher 30 can first by means of the Zwischenschieberfußes 41 of the intermediate slide 40 of the drive 21 of the needle 20 to half foot height and then completely be pushed.

Accordingly, if the carriage, not shown here, moves in the direction of the arrow S, then the intermediate slide foot 41 of the intermediate slide 40 of the needle 20, which is to be used for the "cover" function, is pushed to half foot height by the leading presser part 30 and the Needle 20 is expelled by means of the leading trigger part 10.

The deduction part 10 of the first lock VS has a recess for an additional cam track 11, through which in the direction of carriage S advancing a sprouting of the drive feet 21 of the needle 20 is reached at half the height to the desired level for spotting heightening height. It is ensured that this shoot clearly before the expulsion of the opposite, not shown here needle, which expels to form stitches happens. The withdrawal part 10 'is formed analogously to the deduction part 10 and is used when in a movement of the carriage against the direction of the arrow S, a covering should be performed.

When the drive foot 21 of the needle 20 is within or above the spout lock part 50, it is released. The drive foot 21 is now by means of the cam curve 51 of the Austriebsschlossteils 50 to the system center M deducted so far that the hook 22 of the needle 20 can not catch a thread of the thread guide not shown here.
At the end of the Austriebsschlossteils 50 of the foot 41 of the intermediate slide 40 is again pushed and released in the area after the trailing trigger part 10 'again.

Either both outer pusher parts 30, 30 'may be formed with contact surfaces of different heights or only the left pusher part 30.

If only the deduction part 10 is provided with a cam track 11 and the pusher part 30 is equipped with contact surfaces of different heights, a further function, in particular a transfer function, can be realized in the opposite carriage direction (counter to the arrow direction S).

In the Fig. 2 the solid line sections 15 mean that the foot 41 is not or partially pushed by the pusher parts 30, 30 'and the dotted sections 15.1 mean that the foot 41 is fully pushed.

The solid lines 16 mean that the butt 21 is in engagement with a lock part, while the dotted sections 16.1 mean that the butt 21 is out of engagement with a lock part.

By adjusting the leading trigger parts 10, the desired flash height for each needle 20 can be adjusted individually. The trigger parts 10, 10 'are therefore arranged movably on the first lock VS. In particular, different positions are adjustable.

In the Fig. 3 again the first embodiment of the lock VS is shown. The carriage, not shown, moves in the direction of arrow S. The two pusher parts 30, 30 '(see Fig. 2 ) have been deactivated and are in the Fig. 3 not shown. Therefore, the intermediate slider foot 41 and the drive foot 21 of the needle 20 remain in their upper position. The leading trigger part 10 is located in an upper comb gap closer position and thus does not act on the foot 21 of the needle 20. The foot 21 of the needle 20 strikes the Austriebsschlossteil 50, whereby the needle 20 is expelled to stitch formation and then withdrawn by the trailing trigger member 10 'and an additional trigger member 60' back in the same position comb. Again, the solid line 16 means that the needle butt 21 is in engagement with a lock part, and the solid line 15 means that the intermediate slider foot 41 is not pushed.

The Fig. 3 shows therefore a first lock function, which can be performed in addition to the lock function "cover" with the first lock VS. For this purpose, the first lock VS on the lock parts Austriebsschlossteil 50, deduction part 10 'and deduction part 60'.

Based on Fig. 4 the function "catch" is explained. Again, the carriage, not shown, moves in the direction of the arrow S. The intermediate slide 40 has been in a compared to the view according to Fig. 3 brought forward position. His foot 41 is not acted upon by the leading or trailing press member 30, 30 'so. The pusher parts 30, 30 'may additionally be switched inactive. The leading trigger part 10 is in an upper position and thus does not act on the foot 21 of the needle 20. The foot 21 hits the Austriebsschlossteil 50, whereby the needle 20 is driven out for catching. In the further Course hits the foot 41 of the intermediate slide 40 on the actively switched, central pusher part 70 and is thus pushed. Thus, the foot 21 of the needle 20 also comes out of engagement with the expulsion lock part 50 and slides over it. After passing over the middle pusher part 70 of the foot 41 and thus also the foot 21 comes in an active position (not pushed). The foot 21 moves along the trailing trigger part 10 'and is withdrawn to Kulierposition. To realize the function "catch" thus the lock parts Austriebsschlossteil 50, trailing trigger part 10 'and pusher part 70 are provided.

The solid line 15 means that the foot 41 is not or half pushed, while the dotted line 15.1 means that along this dotted line the foot 41 is fully pushed. The solid line 16 means that the butt 21 is in engagement with a lock part, while the dotted line 16.1 means that the butt 21 is out of engagement with a lock part.

The Fig. 5 serves to display a transfer function. The carriage, not shown, moves in the direction of arrow S. All pusher parts 30, 30 ', 70 are inactive, so they are in the Fig. 5 are not shown. The needle 20 is driven by the foot 21 and by means of the leading trigger part 10 to the transfer position and then withdrawn by means of deduction parts 10 ', 60' to the comb-like position. The reference numerals 15 and 16 have the same meaning as before.

So that the first lock VS can realize a transfer function, only the left pusher 30 was equipped with different levels of contact surfaces, while the pusher 30 'only one Contact surface has a height. Furthermore, only the withdrawal part 10 has a lock track 11. The pusher 30 is in the Fig. 6a shown where it is clear that the contact surfaces 31, 32 are arranged at different heights. In contrast, the pusher 30 'in the Fig. 6b where it is clear that only one contact surface 31 'of uniform height is provided.

For the transfer function, the carriage, not shown here moves in the direction of arrow S 'to the right. The pusher parts 30, 30 'are activated. By this position of the pusher parts, the foot 21 of the needle 20 is fully pushed to the beginning of the region of the cam curve 51 of the Austriebsschlossteils 50 by means of the pusher 30 '. After the release of the foot 21 this comes into engagement with the lock cam 51 and the needle 20 so performs their takeover movement and subsequent retraction movement in comb match position.

The Fig. 7 shows an alternative embodiment of a lock system 1 'with an alternative embodiment of a first lock VS'. In order to be able to realize a covering function, the first lock VS 'has a pusher part 70, which has a central area with a contact area 71 of lesser height. In particular, the contact surface 71 is lower than the adjoining leading and trailing contact surfaces 72, 73. This is in the Fig. 7a shown. The outer contour of the Austriebsschlossteils 50 has been moved from the middle of the lock to the outside. This ensures that a needle for covering time is expelled in front of the opposite needle of the second lock HS at catch level and thus is suitable for covering. In particular, the distance X of the outer contour of the Austriebsschlossteils 50 at the level of the lower edge of the trigger part 10 of the lock center M is greater than the distance Y of the outer contour of the Austriebsschlossteils 50 'of the lock center M at the level of the lower edge of the trigger part 10 "'.

To realize the covering function of the drive foot 21 of the needle 20 cooperates with the Austriebsschlossteil 50, so that the needle 20 is driven out to catching height. If this position is reached, by means of the contact surface 72 of the central pusher 70 of the foot 41 of the intermediate slide 40 and thus the foot 21 of the needle 20 to half engagement level in the lock VS 'is pushed and runs so expelled at the catch level, in this area remote Austriebsschlossteil 50 a. The lock part 50 does not have the full height in this area. By means of the inner contour 52, which is introduced in the Austriebsschlossteil 50, the needle 20 is withdrawn with her foot 21 to the middle of the castle M so far that they can no longer catch a thread. This is possible because the foot 21 of the needle 20 has been released by the contact surface 71 of the pusher 70. Subsequently, the foot 21 is again pushed through the contact surface 73 of the pusher part 70 to half engagement height and brought by means of a sloping contour 53 at Austriebsschlossteil 50 from the area of the Austriebsschlossteils 50. By the trailing trigger part 10 'and other subsequent castle parts, the needle 20 is brought back into the same position comb.

The Fig. 8 shows performing a knitting function (stitching function) by means of the lock VS '. The feet 21, 41 go through the designated Schlossbahnen in full height. The outer pusher parts 30, 30 'and the middle pusher part 70 are not run over or are switched inactive. In addition to the masking function, another function is thus performed by the lock VS '. Corresponding lock parts 10, 50, 60, 10 'are provided for this purpose. The Line 15 means that the foot 41 is not depressed. The line 16 means that the foot 21 is in engagement with lock parts.

The Fig. 9 shows a transfer function. The feet 21, 41 go through the designated Schlossbahnen in full height. The outer pusher parts 30, 30 'and the middle pusher part 70 are not run over or are switched inactive. For this function, the trigger parts 10, 10 '60' are required.

In the Fig. 10 a transfer function is shown. The drive foot 21 of the needle 20 is pushed by means of the leading pusher 30 and thus passes the leading trigger part 10. Within the Austriebsschlossteils 50 of the drive foot 21 is released again to full engagement height. Here, the needle 20 is driven by the lock track 54 in the transfer position and withdrawn again. From this position, a repressing by means of the trailing pusher 30 'takes place again. In this case, the pusher parts 30, 30 'are equipped only with a contact surface of uniform height. The solid line 15 means that there is a full foot engagement, while the line 15.1 means that the foot 41 is pushed. Correspondingly, the solid line 16 means that the needle butt 21 is in engagement with a lock part, while the dotted line 16.1 means that there is no engagement with a lock part.

From the above it follows that the locks VS, VS 'are not only designed for a cover function, but are also designed to perform at least two other lock functions. For this purpose, corresponding lock parts are provided. By pushers 30, 30 ', 70, which cooperate with the foot 41 of an intermediate slide, is determines with which lock parts the foot 21 of a needle 20 engages and what function performs the first lock VS, VS '.

Claims (16)

1. Cam system (1, 1') for a flat knitting machine with a first cam (VS, VS'), having cam parts for realising at least two cam functions of the cam functions "do not knit", "form stitch", "catch", "transfer stitches", "take over stitches", characterised in that the first cam (VS, VS') has at least one cam part for realising a covering function, designed as a trigger part (30, 30', 70), which has contact surfaces (31, 32, 31', 32', 71, 72, 73) on at least two different heights for cooperation with a foot (21, 41) of a slide (40) or a needle (20).
2. Cam system according to claim 1, characterised in that the trigger part (30, 30') has a central-side cam contact surface (32, 32') which lies higher than an external-side cam contact surface (31, 31').
3. Cam system according to claim 1, characterised in that the trigger part (70) has a central contact surface (71) with a lower height than contact surfaces (72, 73) in external areas of the trigger part (70).
4. Cam system according to one of the preceding claims, characterised in that the trigger part (30, 30', 70') is designed as a switchable trigger part.
5. Cam system according to one of the preceding claims, characterised in that a second cam (HS) is envisaged.
6. Cam system according to one of the preceding claims, characterised in that the first cam (VS, VS') has at least one extraction part (10, 10') with a track path (11, 11').
7. Cam system according to claim 6, characterised in that the extraction part (10, 10') is moveably arranged at the first cam (VS, VS').
8. Cam system according to one of the preceding claims, characterised in that the first cam (VS, VS') has a drive-out cam part (50) with a cam curve (51) for realising at least one (of the) cam function(s) "catch" and "cover".
9. Cam system according to claim 8 in connection with one of the claims 6 or 7, characterised in that the external contour of the drive-out cam part (50) has a distance X from the cam centre (M) at the height of the lower edge of the at least one extraction part (10, 10') that is greater than the distance Y of the external contour at the height of an extraction part (10"') from the cam centre (M) of a drive-out cam part (50') of the second cam (HS).
10. Cam system according to one of the preceding claims, characterised in that a following extraction part (10') and an additional extraction part (60') are envisaged on the first cam (VS, VS').
11. Cam system according to one of the preceding claims, characterised in that the first cam (VS, VS') has a preceding and a following extraction part (10, 10').
12. Cam system according to one of the preceding claims, characterised in that the first cam (VS, VS') has two external trigger parts (30, 30').
13. Cam system according to claim 12, characterised in that the external trigger parts (30, 30') are designed differently.
14. Cam system according to one of the preceding claims, characterised in that the first cam (VS, VS') has two external and one central trigger part (30, 30', 70).
15. Flat knitting machine with a cam system (1, 1') according to one of the preceding claims.
16. Flat knitting machine according to claim 15, characterised in that knitting needles (20) and interim slides (40) cooperating with the same are envisaged, wherein the interim slides (40) each have a foot (41).

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