EP4019680A1 - Knitting system for a flat knitting machine - Google Patents

Abstract

The invention relates to a knitting system (1) for a flat knitting machine or warp knitting machine with a first and a second knitting cam (100, 101), in a first knitting cam (100, 101) driven out insert parts between the knitting cams (100, 101) maintaining their respective cam exit position , and wherein pusher parts (2, 5, 21, 51) are present, which ensure that the insert parts remain in their driven-out position.

Description

The invention relates to a knitting system for a flat knitting machine or warp knitting machine with a first and a second knitting cam.
Furthermore, the invention relates to a flat knitting machine or warp knitting machine and a method for operating a flat knitting machine or warp knitting machine.

In the production of knitted fabrics on knitting or warp knitting machines, ever increasing demands are being made in terms of patterns and designs as well as special properties such as e.g. B. with respect to the strength of the entire knitted fabric or areas thereof.
In order to meet these requirements, flat knitting machines have already been developed whose thread guides can be moved independently of the carriage or knitting cam over the needle bed(s) by means of separate drives.

In order to create further options for thread insertion, appropriate options for moving the thread guide in the vertical direction and for pivoting the thread guide rails on which the thread guides are guided were developed. Using these technologies, a wide variety of new types of weave can be realized, since it is now possible to guide threads between the needles, to loop them around and use the threads as warp threads in the knitted fabric.

In order to enable the simultaneous insertion of one or more threads for processing as weft, plating, intarsia or standing threads on knitting or warp knitting machines, the needles selected for this purpose must be brought into a defined, advanced position. Then the carriage takes a position outside the knitting or needle bed area. For this purpose it is known to provide a special lock at the end of the carriage, which brings selected needles out into an advanced position. Since the lock has no trigger parts, normal knitting functions cannot be performed. Incoming, only the needles advanced before the carriage reversal can be processed and retracted.

The object of the present invention is to provide a knitting system and a flat knitting or warp knitting machine in which inserts for a warp thread function can be advanced between the cams and all knitting functions can still be carried out with the knitting cams.

This object is achieved according to the invention by a knitting system for a flat knitting machine or warp knitting machine with a first and a second knitting cam, with inserts driven out in a first knitting cam between the knitting cams each closing their respective cams Maintaining positions and having pusher parts which ensure that the inserts remain in their driven-out position. The expelled inserts can be used for a warp thread application.

Because inserts can be brought into an advanced position between two knitting cams, it is possible to carry out further knitting operations with the inserted insert in the same carriage stroke in the respectively following knitting cam.

A guide cam can be arranged between the first and second cams. The guide cam preferably has at least two guide cam sections and at least one guide cam section can be switched between an active position and an inactive position. In particular, it can be provided that the at least one guide lock subsection can be brought into a lowered position in the direction of the lock plate for an inactive position, or can be moved into, under or over another lock part, in particular another guide lock subsection, and thus be switched to inactive. When the guide cam section is lowered, it can be at least partially sunk into the cam plate. It is also conceivable that the guide lock part section is arranged in an active position at a distance above the lock plate, ie there is "air" between the guide lock part section and the lock plate. The guide lock subsection can be lowered for an inactive position so that the distance to the lock plate is reduced, no longer exists, i.e. the underside of the guide lock subsection is level with the lock plate, or the guide lock subsection is at least partially sunk into the lock plate.

If the guide cam section is shifted for an inactive position, in particular is moved parallel to the upper side of the lock plate, it can be shifted into, over or under another lock part, in particular another guide cam section. The other cam may have a pocket to accommodate the displaced guide cam section.

Due to the fact that at least one guide cam part section can be switched off, a further cam track can be created which can be used by insert parts that have been pushed forward for a warp thread insert. However, if the guide cam portion is used in its active position, the guide cam can be used in its conventional function.

The guide lock part can have three guide lock part sections. At least one partial guide lock section can be switchable. It is thus possible, for example, to form a channel between the two other guide lock subsections by inactivating one guide lock subsection. In particular, this makes it possible to keep the control feet separate from inserts that have been advanced and from inserts that have not been advanced. This supports the reliability of the knitting process.

In particular, a guide cam section can be provided for stabilizing control butts of knitting needles when they pass through a cam track formed by another guide cam section.

It is particularly advantageous if the first and second knitting cams each have a take-off part adjacent to the guide cam part, with a presser part being arranged below the take-off parts, which is also arranged at the same height as a presser part of the respective knitting cam provided to form a tuck loop. The position of the pusher part and the height of the expulsion of the insert part do not necessarily have to be in the position for inserting tuck loops.

If a take-off part is provided, the usual, normal knitting functions can be performed. By providing a further additional pusher part in the area of the trigger part, however, it is possible to prevent the control feet of insert parts that have assumed a pushed-for position from being pulled off the trigger part. Thus, the inserts remain in an advanced position and warp thread applications can be carried out. In the case of knitting locks, a presser part is often already provided in the area of a take-off part, but this is located on a different track than a presser part, which is provided for forming a tuck. In the arrangement according to the invention, two pusher parts are therefore preferably provided below a trigger part. Depending on which knitting function was performed with an insert part that is to remain in an advanced position, a pusher part in the area of the pull-off part can prevent the insert part from being pulled off, so that the insert part remains in an advanced position.

At least one knitting cam can have an additional guide cam part with at least two guide cam part sections, of which at least one is switchable. This makes it possible to repeatedly bring inserts into an advanced position for a warp thread insert in the same carriage stroke and to insert multiple warp threads into the advanced inserts before a carriage reversal.

A flat knitting machine or warp knitting machine with a knitting system according to the invention also falls within the scope of the invention. Such a knitting machine or warp knitting machine is particularly suitable for warp thread applications.

At least two thread guides can be provided, with one thread guide being able to displace the other. This can prevent the threads to be inserted, which are guided through the thread guides, from being damaged.

Alternatively or additionally, it is conceivable that at least one thread guide can be pivoted transversely to the direction of movement of a carriage. This can also prevent damage to threads, since one thread guide can avoid the other thread guide.

According to one embodiment, at least one thread guide that is driven independently and at least one thread guide that can be taken along by a carriage can be provided. This makes it possible to create a variety of different patterns.

Furthermore, the scope of the invention includes a method for operating a flat knitting machine or warp knitting machine, in which one or more inserts, in particular knitting needles, of a front needle bed and/or one or more inserts, in particular knitting needles, of a rear needle bed for a warp thread application cam-ending between two knitting cams be brought into a defined advanced position and then a thread is inserted or presented in the advanced inserts. The fact that inserts can be placed between two knitting cams in an advanced position, it is possible in the same carriage stroke in each subsequent knitting cam to carry out further knitting operations with the advanced insert.

Outgoing lock designates the area following the knitting lock in the direction of the carriage. Incoming cam designates the area that precedes the knitting cam in the direction of the carriage.

In order to ensure that the inserts remain in an advanced position, a pusher part can be provided which prevents the advanced inserts from being pulled off. In addition, a guide lock part can have a guide lock part section that can be switched inactive, so that an additional lock track is created and a withdrawal of the inserts at this point is avoided. In particular, a switchable handle part can lift the correspondingly selected insert parts out of the lock curve via a trigger part and thus prevent the insert parts from being removed. In this case, a section of the respectively trailing guide lock part can be switched inactive, as a result of which the insert parts are moved along the additional lock track created as a result. The selected inserts can thereby remain in their advanced position, allowing warp threads to be inserted into these inserts.

The inserts to be advanced, in particular knitting needles, can be selected and advanced in the needle bed via a cam cam. Then, depending on the switching position of a pusher part and depending on the selected lane, a tuck loop or a stitch can be formed with the inserted inserts. Thereafter, the advanced inserts, as already stated above was lifted over a trigger part by an activated handle part, so that they reach a lock track.

This means that both inserts with which a tuck loop has been formed and inserts with which a stitch has been formed can assume an advanced position for a warp thread application. The preceding insertion of weft threads is also conceivable.

It is particularly advantageous if the control feet are kept separate from inserted parts that have been advanced and from inserts that have not been advanced by a partial guide lock section.

There are particular advantages if the inserted parts that have been pushed forward are pulled back into a basic position in the following knitting cam in the same carriage stroke. By using a knitting system with several knitting cams, different inserts driven out for the warp thread insert and/or inserts driven out for the warp thread insert can be processed several times in a knitting system with several knitting cams and pulled back into the basic position in the subsequent knitting cam. The carriage does not have to be stopped within a stroke, which increases the efficiency of the warp insert within the knitting process.

A cam track can be created on the incoming side of the cam by removing a guide cam section. In particular, this can prevent the advanced insert parts from being pulled off as they enter the lock.

According to a variant of the method, the warp thread insertion can take place without the carriage leaving the knitting area or the needle bed. This makes the knitting process particularly effective.

According to the invention, it is therefore possible, in addition to thread insertion and stitch formation, as is conventionally done, to drive out all inserts or areas of inserts of the front and/or rear needle bed for warp thread applications, each between the cams of a knitting system, into a predefined advanced position. The inserted parts that are advanced or expelled for warp thread applications can be brought into the position for warp thread insertion between the cams, either as a whole or individually or in groups, and can also be removed again.

It is possible to process and knot the inserted parts, which are driven out between the individual cams of a knitting system for warp thread applications, entering the cam in the following knitting cam. With these inserts, knitting operations such as stitch forming, catching, weft thread insertion, etc. can be carried out.

Furthermore, it can be provided that at least one independently driven thread guide, which can have been optimized for warp thread insertion, and/or at least one conventional thread guide carried along by a carriage, can act between the knitting cams. At least one thread guide can be provided, which can simultaneously guide one or more threads to the insert parts driven out for the warp thread insert.

All, some or some of the driven-out insert parts can remain in the driven-out position via one or more locks, i. H. By providing and suitably switching pusher parts, it is possible to prevent inserted parts that have been driven out from being pulled off by cam locks that are moved past the inserted parts after they have been driven out. Inserts, which are in their advanced position between the locks for inserting the warp thread, can originate from the front and/or rear needle bed.

The inserts can be designed as latch needles or compound needles.

A handle part control can have an additional switchable handle part on the lock outgoing and/or on the lock incoming side of the lock. The additional switchable handle part, in particular in the area of a trigger part, can lift the correspondingly selected insert parts from the lock cam over the assigned trigger part and thus prevent the insert part from being removed. In this case, for example, the lower part of the respectively trailing guide lock part can be switched inactive, as a result of which the insert parts are moved along the additional lock tracks created. The selected inserts can thereby remain in their advanced position, whereby the insertion of warp threads into these inserts is possible.

Further features and advantages of the invention result from the following detailed description of exemplary embodiments of the invention, using the figures of the drawing, which show details essential to the invention, and from the claims. The features shown there are not necessarily to be understood to scale and are presented in such a way that the special features according to the invention are clearly visible can be made. The various features can each be implemented individually or in groups in any combination in variants of the invention.

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

Fig. 1

ein Stricksystem mit einem ersten und einem zweiten Strickschloss;

Fig. 2

beispielhaft den möglichen Weg zur Fangbildung in einem ersten Schloss und zum daran anschließenden Austrieb zu einer Kettfadeneinlage zwischen den Schlössern;

Fig. 3

einen Bereich eines der Nadelbetten, innerhalb welchem Nadeln zwischen den Schlössern in eine vorgeschobene Position gebracht wurden;

Fig. 4

einen Bereich eines Nadelbetts, in dem Nadeln zur Maschenbildung ausgetrieben wurden;

Fig. 5

eine Darstellung entsprechend der Figur 4, wobei in zwei Bereichen Nadeln zur Maschenbildung ausgetrieben wurden;

Fig. 6

einen Ausschnitt einer Flachstrickmaschine mit einem Fadenführer;

Fig. 7

eine Darstellung entsprechend der Figur 6, wobei nur in einem kleineren Bereich Nadeln zur Kettfadeneinlage ausgetrieben wurden;

Fig. 8

eine Anordnung mit insgesamt drei Fadenführern;

Fig. 9

eine Anordnung, bei der zwei Fadenführer sich gegenseitig verdrängen können;

Fig. 10

eine Anordnung mit einem Fadenführer, der quer zur Schlittenbewegungsrichtung bewegbar ist;

Fig. 11

eine Darstellung entsprechend der Figur 7, wobei in einem kleinen Bereich Nadeln im vorderen und im hinteren Nadelbett zur Kettfadeneinlage ausgetrieben wurden.

Show it:

1

a knitting system with a first and a second knitting cam;

2

an example of the possible path to catch formation in a first lock and the subsequent budding to a warp insert between the locks;

3

a portion of one of the needle beds within which needles have been brought to an advanced position between the cams;

4

an area of a needle bed where needles have been driven out for stitch formation;

figure 5

a representation according to the figure 4 , whereby needles for stitch formation were driven out in two areas;

6

a section of a flat knitting machine with a thread guide;

7

a representation according to the figure 6 , whereby needles for warp thread insertion were only driven out in a smaller area;

8

an arrangement with a total of three thread guides;

9

an arrangement in which two thread guides can displace each other;

10

an arrangement with a thread guide which is movable transversely to the direction of movement of the carriage;

11

a representation according to the figure 7 , whereby in a small area needles in the front and rear needle bed were driven out for warp thread insertion.

figure 1 shows part of a knitting system 1 with a knitting cam 100 and with a knitting cam 101. A guide cam 11 is arranged between the knitting cams 100, 101, in particular between the take-off parts 3, 31 of the adjacent knitting cams 100, 101, or between the dashed lines. The guide lock part 11 has guide lock sections 11a, 11b, 11c, of which at least one guide lock section 11a, 11b, 11c can be switched, i.e. can be lowered or slid in the direction of lock plate 7 in, under or over another lock part, in particular guide lock section 11a, 11b, 11c .

Presser parts 2, 4, 5, 21, 41, 51 are provided in order to be able to sink control butts of insert parts, such as knitting needles, into a needle bed for various knitting operations.

In the exemplary embodiment shown, a further guide lock part 10 is provided, which is also designed in several parts and in particular has the guide lock part sections 10a, 10b, 10c, in which at least one guide lock part section 10a, 10b, 10c can also be switched, d. H. in the direction of the lock plate 7 can be lowered or displaced in, under or over another lock part, in particular a guide lock part section 10a, 10b, 10c. In the exemplary embodiment shown, the guide lock sub-sections 10a, 11a are designed as a fixed section and the guide lock sub-sections 10b, 11b are each designed as switchable guide lock sub-sections. However, it is also possible to design other guide lock sub-sections to be switchable or fixed, or to design all guide lock sub-sections 10a, 10b, 10c, 11a, 11b, 11c to be switchable.

The switchable guide cam sections 10b, 11b can be driven or switched by means of slides, levers, motors, hydraulically or pneumatically. The switchability of the guide lock part sections 10b, 11b creates an additional lock track for control feet of inserts.

Furthermore, the presser part control on both sides of the switchable presser parts for catching 4, 41 of the two knitting locks 100, 101 has been supplemented by additional presser parts 2, 21, which can also be switched. The switchable handle parts 2, 21 are arranged in the area of trigger parts 3, 31. In particular, they are provided below the trigger parts 3, 31. In addition, the pusher parts 2, 21 are arranged at the same height or track as the pusher parts for catch 4, 41.

If the control feet of inserts are on a different track, further pusher parts 5, 51 can be provided, which are also designed to be switchable. The pusher parts 5, 51 are arranged below the pusher parts 2, 21. In particular, they are also arranged below the trigger parts 3, 31. The control butts of selected inserts can be pressed into the needle bed by the presser parts 2, 21, 5, 51 and thus lifted out of the cam cam via the respective trigger part 3, 31, thereby preventing the selected inserts from being pulled back or crooked.

If, in addition, the trailing guide cam section 10b, 11b is switched away, i.e. lowered or moved into, under or over another cam part, in particular guide cam section 11a, 11c, the control butts of the selected insert parts are guided through the now released, additional cam track. This keeps the inserts in their advanced position. They can be used in this position for warp applications.

The other guide cam sections 10c, 11c, which can be designed to be switchable, enable a reliable separation of the non-selected inserts in the basic position and the inserted inserts selected for the warp thread insert and advanced.

the figure 2 shows the possible path F/M for tuck formation in lock 101 and for the subsequent expulsion to warp thread insertion between the knitting locks 101, 100 when the knitting system 1 (and thus a carriage to which the knitting system is coupled) is moved in the direction of the arrow L. The path F/M is shown as a dashed line.

The selected control butt or butts of inserts first pass the exit cam part 61 of the knitting cam 101, as a result of which the inserts are advanced out of their same comb position in the needle bed. The control butts of the selected inserts are pressed into the needle bed by means of the presser part 41 for catch. So first tuck loops are formed here with these inserts. In the further course of the path, the control butts are also pressed into the needle bed by the additional switchable presser part 21, as a result of which they cannot be pulled back by the subsequent trigger part 31. The trailing guide lock part section 11b is switched to an inactive position, ie lowered or moved into, under or over another lock part. The control feet of the inserts are guided through the additional cam Z1. The selected inserts remain in their advanced position and can be used for warp applications. "Following" means that a cam part or latch part is moved past an insert part after another cam part or latch part during a carriage stroke.

As the carriage continues to move, the selected control butts reach the subsequent (subsequent) knitting cam 100. Here the inserts, into which one or more threads have been inserted in the area of cam track Z1, can knot these threads, form additional stitches and/or tuck loops or in remain in their advanced position. In the exemplary embodiment shown, tuck loops are formed with the knitting cam 101 and stitches are formed with the knitting cam 100. Of course, all other ways of processing the thread in the knitting cams 100, 101 can also be used here.

the figure 3 shows a section of a needle bed N. When the carriage moves in the direction of the arrow L, in the area between the knitting cams 100, 101, the inserts, in particular needles (in the following, inserts are always meant in general when needles are mentioned), become the warp insert in brought to an advanced position, which is indicated by the area B. The advanced needles are then pulled back by the knitting cam 100 to their same comb position. In the example shown, all needles in area B are driven out for warp thread insertion. However, only needles in specific sections or individual needles can also be expelled. Only one side of the needle bed is shown for simplification. The knitting cams 101, 100 are not explicitly shown, only brushes arranged above the knitting cams 100, 101 (in the case of latch needles).

the figure 4 shows that in area B one of the needle beds between the knitting cams 101, 100 needles were advanced for a warp thread insertion. In contrast to figure 3 However, here the needles were additionally driven out by the knitting cam 101 in area C to form stitches. It goes without saying that it is also possible to form tuck loops or a combination of tuck loops and stitches in the cam lock 101 . The same applies to the knitting lock 100.

According to the figure 5 were additionally driven out of the needles in area B, which were advanced for a warp thread application, in areas C, C' with the knitting cams 101, 100 needles, so that one or more stitches can be formed. It goes without saying that it is also possible to form tuck loops etc. in the knitting cam 101 and in the knitting cam 100 .

When depicting the figure 6 It can be seen that a thread guide 20 is provided for warp thread insertion, which can insert threads in area B between the knitting cams 100, 101. In the embodiment shown, the thread guide 20 can bring seven adjacent threads to the needles driven out in area B. Of course, it is also possible to have more or fewer threads at the same or different distances from one another. In this way, threads can be inserted into the needle hook, or the needles can be wrapped around by means of the thread guide 20.

In the embodiment according to figure 7 only needles in area B' were expelled for warp thread insertion. In the example shown, the number of needles driven out corresponds to the number of threads guided through the thread guide 20 . However, more or fewer needles can also be driven out at the same or different distances from one another for a warp thread insert.

In the representation according to the figure 8 a thread guide 20 for inserting the warp thread and two further thread guides 30, 30' are provided. The thread guides 30, 30' can, in addition to the warp thread insertion through the thread guide 20, insert further threads, individually or in groups, into needles driven out by the knitting cams 100, 101. All types of stitch formation and techniques for inserting weft threads are possible in accordance with the state of the art.

The thread guides 30, 30' can be positioned in front of and/or behind the thread guide 20 for inserting the warp thread and feed threads to needles of both the front and the rear needle bed.

In the figure 9 it is shown that the insertion of warp threads through the thread guide 20 for inserting warp threads can be combined with the insertion of knitting threads through the thread guide 30 in the area B'. The two thread guides 20, 30 can displace each other in order not to damage the threads to be inserted.

One of the thread guides 20, 30 can be designed as an independently driven thread guide. Both thread guides 20, 30 can also be designed as independently driven thread guides.

the figure 10 shows the possibility that the yarn guides 20, 30 can be moved past one another in such a way that they do not have to displace one another. This can be achieved in that one of the thread guides, in the exemplary embodiment shown thread guide 20 for inserting warp threads, is moved by means of a pivoting movement transversely to the direction of the carriage next to a driven-out needle and/or between several driven-out needles and thus moves away from thread guide 30. The thread guide 30 can thus pass the thread guide 20 to the warp thread insert without contact.

In the figure 11 it can be seen that the expulsion of inserts for warp thread insertion can be carried out with a knitting system according to the invention on the front and/or on the rear needle bed or on both needle beds at the same time. The advanced areas of the inserts of the respective needle beds can be separated from each other (not shown here) or overlap.

Claims (17)

Knitting system (1) for a flat knitting machine or warp knitting machine with a first and a second knitting cam (100, 101), characterized in that inserted parts driven out in a first knitting cam (100, 101) retain their positions between the knitting cams (100, 101) each cam exit , wherein pusher parts (2, 5, 21, 51) are present, which ensure that the insert parts remain in their driven-out position. Knitting system according to Claim 1, characterized in that a guide cam part (11) is provided between the knitting cams (100, 101). Knitting system according to Claim 2, characterized in that the guide cam part (11) has at least two guide cam part sections (11a, 11b, 11c) and at least one guide cam part section (11b) can be switched between an active position and an inactive position, in particular can be lowered or in, under or can be moved via another part of the lock. Knitting system according to Claim 2 or 3, characterized in that the guide cam part (11) has three guide cam part sections (11a, 11b, 11c). Knitting system according to one of the preceding claims 3 or 4, characterized in that a guide cam part section (11c) is provided for stabilizing control butts of inserts when they pass through a cam track (Z1) formed by another guide cam part section (11b). Knitting system according to one of the preceding Claims 2 to 5, characterized in that the first and second knitting cams (100, 101) each have a take-off part (3, 31) adjacent to the guide cam part (11), with below the take-off parts (3, 31) a presser part (2, 21, 5, 51) is arranged in each case, which is also arranged at the same height as a presser part (4, 41) of the respective knitting cam (100, 101) provided for forming a tuck loop. Knitting system according to one of the preceding claims, characterized in that at least one knitting cam (100) has an additional guide cam part (10) with at least two guide cam sections (10a, 10b, 10c), of which at least one is switchable. Flat knitting machine or warp knitting machine with a knitting system (1) according to one of the preceding claims. Flat knitting machine according to Claim 8, characterized in that at least two thread guides (20, 30, 30') are provided, one thread guide (20, 30, 30') being able to displace the other. Flat knitting machine according to Claim 8 or 9, characterized in that at least one thread guide (30) can be pivoted transversely to the direction of movement of a carriage. Flat knitting machine according to one of the preceding claims 8 to 10, characterized in that at least one independently driven thread guide (20, 30, 30') and at least one thread guide (20, 30, 30') which can be carried by a carriage are provided. Method for operating a flat knitting machine or warp knitting machine, in particular according to one of Claims 8 to 11, in which one or more inserts, in particular knitting needles, of a front needle bed and/or one or more inserts, in particular knitting needles, of a rear needle bed for a warp thread application between two cams knitting locks (100, 101) are brought into a defined advanced position and then a thread is inserted or presented in the advanced inserted parts. Method according to Claim 12, characterized in that a pusher part (2, 21, 5, 51) is activated at the end of the lock in order to lift the control butts of the inserted parts that have been pushed forward over a trigger part (3, 31) and a lock track (Z1) for the control butts of the pushed-out parts Insert parts is created by a guide lock part section (11b) is switched, in particular lowered or is moved into, under or over another lock part. Method according to Claim 12 or 13, characterized in that inserted parts that have been advanced are retracted into a basic position in the following knitting cam (100, 101) in the same carriage stroke. Method according to one of the preceding Claims 12 to 14, characterized in that a cam track (Z1) is created on the incoming side of the lock by switching off a partial guide cam section (11b). Method according to one of the preceding Claims 12 to 15, characterized in that the warp thread is inserted without the carriage leaving the knitting area or the needle bed. Method according to one of the preceding claims, characterized in that the control feet are kept separate from inserted parts that have been advanced and from inserts that have not been advanced by a guide lock part section (11c).

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