DE4324670C2 - Method and device for binding off a knitted fabric on a flat knitting machine - Google Patents

Description

The invention relates to a method and a direction to bind off a knitwear on a Flat knitting machine.

DE-C-32 03 028 describes a method for binding knitted fabrics on a flat knitting machine known in which the stitch to be unlinked on the neighboring stitch and reassigned it Stitch is then knitted. That is what the feeder is for of a thread over a thread guide that during the knitting process over the flat knit machine must be moved. The requisite Such lock carriage movement increases the time wall for the knitting process. With double beds Knitwear is also a change of measure a shifting process and a hanging back of the dimensions necessary. The needle offset can vary because only a limited needle pitch, depending on the Possibility of the machine to take place. Then the Misalignment returned and the misalignment again the needles are carried out in single steps. However, this is with a considerable time lag verbun wall to produce the edge of the goods the.

From GB-A-20 32 470 is a hand flat knit machine with a single needle bed known in the an actuation to be moved on the needle bed device is provided, which is a needle element sums up. This needle element is used for binding off sets and be by hand using a crank mechanism moves. They are also complicated facilities provided to prevent one on the needle element located unwanted from the needle slides. Aside from the fact  that with this known flat knitting machine only single bed Goods can be knitted is this known device constructively complex.

From DE-PS 41 07 316 and DE-OS 22 62 199 are flat knitting or knitting machines with auxiliary needle beds known for knitting tubular goods or for moving, not but are intended or suitable for binding off.

The invention is therefore based on the object, a Ver drive and a device for decoupling a knitted fabric to specify or create on a flat knitting machine, the or the chain off without thread guide and with little enables additional effort with high productivity.

The object is achieved by a Device for binding off a knitted fabric on a Flat knitting machine by means of an auxiliary needle Auxiliary needle bed released, which over the flat knitting machine can be moved away. With the additional auxiliary needle it is possible to chain off without using a Thread guide, d. H. without performing a knitting process make the binding process essential is simplified and facilitated. In particular, it is not more necessary, the offset required for the binding off with an offset device of the flat knitting machine perform one of the needle beds opposite the another needle bed is moved. The offset is at such provided with offset devices Flat line machines only possible with a few needle pitches. After that, all stitches of the offset needle bed must reassembled, the staggered needle bed back into the Returned to the starting position and the stitches open again the needle bed returned to the starting position be reassigned. These operations require several Slide strokes, so that the binding off in the conventional Flat knitting machine is time consuming and unproductive.  

In principle it would be possible to extend the Lock carriage lock parts for controlling the needles in the to provide existing needle beds for the binding process. However, this contradicts the basic requirements a modern flat knitting machine, namely the castle build as short as possible to increase productivity. With the method according to the invention, this disadvantage namely to use a longer lock for decoupling have to bypassed. Normal knitting is just the usual Slide stroke required. And only when bound off the carriage stroke increases.

According to a very advantageous embodiment of the invention is a device for the predetermined movement of the Auxiliary needle provided in the first needle bed. As before the movements of the are repeated Auxiliary needle for binding off the individual stitches periodically. It is therefore advantageous to use such To provide movement devices for the auxiliary needle. On An example of this is a rotatable cam with which a needle foot of the auxiliary needle according to the intended Curve shape of the cam is moved. This is special advantageous if only one auxiliary needle is provided, because then there is space for such a cam. At A plurality of auxiliary needles is another embodiment of the Movement device advantageous, namely a separate for the control device provided with the auxiliary needle bed a power operated by a motor Carrier device, such as one on the estate gripping rack.

According to a particularly advantageous embodiment of the Er is the auxiliary needle bed on one side of the lock attached sled. As stated earlier, it is possible to move the auxiliary needle only by moving it  to move the lock carriage so that with a single Hub the entire knitted fabric can be bound off.

Another very advantageous embodiment of the invention is that the auxiliary needle bed over one of the Needle beds of the knitting machine is arranged. It is particularly advantageous if the auxiliary needle bed with respect to the Goods withdrawal direction arranged at an angle of less than 90 ° is. Since the trigger device on the mesh of one Flat knitting machine exerts a pull down, the Practically not unwittingly stitches from the auxiliary needle be subtracted, which would be the case if the auxiliary needle closed Wagon withdrawal direction has an angle of 90 °.

If the angle of the needle beds of the flat knitting machine to Pull-off direction has, for example, 50 ° for example a corresponding angle of 70 ° for that Auxiliary needle bed advantageous. Generally speaking, needs the distance of the auxiliary needle bed from the needle bed of the flat knitting machine just to be so big that the control the needles of the needle bed through the auxiliary needle bed is impaired or disturbed. It is therefore preferred Auxiliary needle bed at a slightly larger angle than the angle the needle beds are attached to one side of the carriage.

The auxiliary needle bed can have only one auxiliary needle. It is also possible and advantageous in certain cases It is necessary to provide several auxiliary needles in the auxiliary needle bed.

According to the invention, the object is also achieved with a Method by the measures specified in claim 13 solved.

Before the actual chaining process begins, according to step a all stitches of a right Right-hand knits that focus on one, for example rear needle bed are in a known manner on the  others, such as the front bed of needles. The information "front" and "back" needle bed does not mean that the Process steps and procedures not vice versa on the "rear" or "front" needle bed can be performed can. For the sake of simplicity and clarity below, however, in the explanation of the invention, the Be handles "front" and "rear" needle bed used.

After the rear needle bed due to the transfer process none If there are more stitches, knit from right to right (Process step b). This will be on the needles of the rear needle bed tuck handle formed because on this There are no stitches.

In a further step c, the tuck handles thrown off the needles of the rear needle bed so that the stitches on the front needle bed become large. This is desirable and intended because the inventor according to the binding process thereby not elastic warped closing seam results. Furthermore, there is a Knocking off and transferring the stitches during the Easy to implement the binding process, because in the There is enough thread.

The egg now begins with the next process step usual binding process, but no thread guide more is needed.

According to method step d, a stitch to be decoupled becomes from the needle of the front needle bed carrying this stitch slipped on an auxiliary needle. As below will be explained, there is the auxiliary needle preferably over the rear needle bed and can in the usual way in a needle channel of an auxiliary needle bed be moved.  

The transfer process starts from a starting position from which the auxiliary needle and the needle of the front Needle bed with the stitch to be decoupled in comb match are located. This is followed by what is known per se Transfer process an expulsion of the auxiliary needle in the over position and an expulsion of the to be decoupled The front needle bed has a stitch in the Transfer position, so that with a corresponding offset between the transferring process takes place with the two needles. Like in the auxiliary needle is still to be carried out each opposite the needle of the front needle bed, whose Chain should be bound off.

The next process step e, namely the Ab beat the old stitch over the new, stitched stitch by pulling off the auxiliary needle in that the Auxiliary needle is brought into the tee position. The needle of the the front needle bed is in a comb match.

The first stitch to be decoupled is of course no old stitch on the auxiliary needle yet. Throwing the old stitch over the new stitch is therefore only in the next Process cycle possible.

The next step f, the auxiliary needle is so far driven out that the last stitch taken behind the Tongue slips. If necessary, the auxiliary needle afterwards moved so far in the direction of the ridge that an offset of needles is possible.

With the next step g, the auxiliary needle is turned a needle pitch offset. If, as in the following will be explained, the auxiliary needle bed and thus the Auxiliary needle is attached to the lock carriage, the Castle slide one division further, so that the auxiliary needle is moved in this way. The auxiliary needle is located  afterwards, i.e. opposite the needle of the front Needle bed that carries the next stitch to be decoupled.

According to method step h, the binding-off ver Repeat steps d to g until all stitches are bound off.

In the method according to the invention, the decoupling takes place the entire trailing edge gradually during one single sled strokes. In contrast to conventional ones Stapling procedures are therefore no additional sled strokes for the movement of the thread guide and other ver Driving steps required so that productivity is significantly increased.

According to a very advantageous embodiment of the invention the process of chaining off the last one differs Knitting off the remaining stitches in that after after the last stitch has been cast off from the auxiliary needle is put on a needle of the front needle bed. To throwing the old stitch over the new one Stitch by pulling off the auxiliary needle according to process step e becomes the auxiliary needle in the transfer position expelled. However, the corresponding opposite needle of the front needle bed in Takeover position so that the last stitch then is reassigned to the front. After this process becomes both the auxiliary needle and the needle of the front Needle bed brought back in comb match.

According to a further very advantageous embodiment of the Invention will be the auxiliary needle in an auxiliary needle bed moves. The auxiliary needle moves accordingly the process steps b to f, d. H. the auxiliary needle leads the needle movement for transferring, knocking off and ver pass the stitch behind the tongue of the auxiliary needle.  

As already mentioned, it is particularly advantageous when the auxiliary needle bed is attached to the lock slide. This will make the auxiliary needle together with the lock slide shifted and in this way process step g, namely the displacement of the auxiliary needle by at least one Needle division carried out.

The auxiliary needle moves in an auxiliary needle bed preferably with periodically repeating predetermined processes. This is possible because, as before was carried out for each stitch to be decoupled Repeat the binding process according to the invention. That’s it also possible to specify the processes periodically rigid, making the process simple and repeatable can. The individual processes for the Hanging, knocking off and driving out the auxiliary needle summarized a single periodic process.

The invention and further refinements and advantages is or will be based on play explained with reference to the drawings. It demonstrate:  

Fig. 1 is a schematic representation of part of a flat knitting machine in the viewing direction from above on the lock slide with attached auxiliary needle bed,

Fig. 2 is a cross section along the Fig. 1 section line II-II,

Fig. 3 shows an example of a cam to control the needle foot of the auxiliary needle in a schematic representation and

Fig. 4 shows another embodiment of a device for controlling the needle whose stitch is to be linked abge.

Fig. 1 shows a detail of a rear needle bed 1 and a front needle bed 2 , over which a Schlit th 3 with a rear carriage jaw 4 and a front carriage jaw 5 is located, which are connected to each other via a carriage bracket 6 . At one end of the slide jaws 4 and 5 , an additional device 7 is flanged, the auxiliary needle bed 9 with an auxiliary needle 10 in the rear part 8 and a control device 12 for controlling the movement of an auxiliary needle 10 opposite needle in the front in the front part 11 Has needle bed 2 .

As can be seen on the basis of the sectional representation shown in FIG. 2 along the section line II-II drawn in FIG. 1, the front part 11 of the additional device 7 has a control device 12 which has a drive device, for example a motor 14 , in the drive-out direction in FIG . 2 is interpret th needle 15 is movable and moves over the needle foot 16 in a needle channel 17 according to the previously be registered manner for performing the method.

The rear part 8 of the additional device 7 also has a movement device 18 which moves the at least one auxiliary needle 10 in accordance with the required movement process for binding off in an auxiliary needle channel 19 .

The movement device 18 is preferably a cam 20 , as shown in a possible exemplary embodiment from FIG. 3. The curve disc 20 has an inner curve 21 in this embodiment. With a motor, for example a stepper motor, the cam 20 is rotated in a controlled manner about its pivot point 22 . A needle foot 23 of the auxiliary needle 10 performs a curve 21 corresponding movement corresponding to the direction indicated by a double arrow 24 for driving out and pulling off the auxiliary needle 10 . The curve 21 is designed such that the movements of the auxiliary needle 10 required for the binding off are carried out.

An embodiment of the control device 12 for moving the chain-supporting needle 15 is shown schematically in FIG. 4.

The control device 12 is flanged onto a side surface 25 of the lock slide 3 . The control device 12 is preferably part of the additional device 7 , which also includes the rear part 8 with the auxiliary needle bed 9 and the movement device 18 . This entire set to device 7 is detachably attached to one side of the cam carriage 3 so that only then, will be carried out if From kettelvorgänge, the auxiliary device is flange-mounted on the lock slide 3. 7

As shown in Fig. 4, the Steuereinrich device 12 has a plate 26 which is in the plane of the lock plate 27 of the lock carriage 3 . A plate extends through the plate 26 , which has a driver 29 which takes the needle foot (not shown) of the needle which carries the stitch 65 to be decoupled. The control 28 and the driver 29 who is driven by a motor 32 via a rack 30 and a pinion 31 and controlled in motion so that the movement required for binding off movement of this needle on the other needle bed 2 leads out. The selection of the respective needle, the stitch of which is to be bound off, is carried out by moving the lock slide 3 over the needle bed 2 , so that the driver 29 is brought close to the location of the needle to be selected. The lock carriage 3 does not move during the stitching process of a stitch. Only the driver 29 - and of course also the auxiliary needle 10 - are moved in the manner described above.

With the measures and features of the invention, it is thus possible to carry out the chaining off of the entire finished seam with a single slide hub, the chaining process being carried out step by step needle by needle. Since the control of the needle does not have lock parts, and thus not by the movement of the lock slide 3 itself, but is performed by an additional control device 12 , special locks which are set up and trained for the binding process are not required, which means no additional costs hen this arises and in particular the castle does not have to be built larger than is necessary for the actual knitting. In addition, it is also not necessary to move thread guides in the binding process according to the invention, so that because he is not required for required lock slide movements.

The invention has been explained with reference to preferred exemplary embodiments. However, numerous modifications and refinements are possible for the person skilled in the art without departing from the inventive concept. It is possible, for example, to provide the structure of a control device shown in FIG. 4 for the auxiliary needle above the auxiliary needle bed. A cam can also be provided to control the needle carrying the stitch to be unlinked, as described in connection with the movement of the auxiliary needle 10 .

Claims (22)

1. Device for decoupling a knitted fabric on a flat knitting machine, characterized by an auxiliary needle bed ( 9 ) having an auxiliary needle ( 10 ), which can be moved over the flat knitting machine. 2. Device according to claim 1, characterized by a device for the predetermined movement of the auxiliary needle ( 10 ) in the auxiliary needle bed ( 9 ). 3. Apparatus according to claim 1 or 2, characterized in that the movement device ( 18 ) is a rotatable cam ( 20 ). 4. Apparatus according to claim 1 or 2, characterized in that the movement device ( 18 ) is a separate, for the auxiliary needle bed ( 9 ) provided movement device. 5. The device according to claim 4, characterized in that the auxiliary needle bed ( 9 ) has a movement device with a separate motor. 6. Device according to one of claims 1 to 5, characterized in that the auxiliary needle bed ( 9 ) on one side of the lock carriage ( 3 ) is attached. 7. Device according to one of claims 1 to 6, characterized in that a control device ( 12 ) for moving the needle carrying the stitch to be decoupled ( 15 ) is provided on the other needle bed ( 2 ). 8. The device according to claim 7, characterized in that the control device ( 12 ) is attached to the side on which the auxiliary needle bed ( 9 ) of the lock carriage ( 3 ) is arranged. 9. The method according to at least one of claims 1 to 8, characterized in that the auxiliary needle bed ( 9 ) and the control device ( 12 ) is a uniform additional control ( 7 ) which is removably attached to the lock slide ( 3 ). 10. Device according to one of claims 1 to 9, characterized in that the auxiliary needle bed ( 9 ) over one of the needle beds ( 1 , 2 ) of the knitting machine is arranged. 11. Device according to one of claims 1 to 10, characterized in that the auxiliary needle bed ( 9 ) is arranged at an angle of less than 90 ° with respect to the direction of removal of the goods. 12. The device according to one of claims 1 to 11, ge indicates to carry out the method according to a of claims 1 to 8. 13. Method for binding off a knitted fabric on a flat knitting machine with a device according to one of the preceding claims, characterized by the following method steps:

• a) transferring the stitches from needles of one needle bed to needles of the other needle bed;
• b) knitting the needles in right-right;
• c) dropping the tuck handles from needles of the one needle bed;
• d) transferring a stitch to be decoupled from the needle carrying the stitch of the other needle bed to an auxiliary needle;
• e) knocking off the old stitch over the new, knitted stitch by pulling off the auxiliary needle;
• f) driving out the auxiliary needle;
• g) moving the auxiliary needle by at least one needle pitch;
• h) repeating process steps d) to g) until all stitches have been bound off.

14. The method according to claim 13, characterized in that the last stitch after decoupling from the Transfer the auxiliary needle to a needle of the other needle bed is hanged. 15. The method according to claim 13 and 14, characterized shows that the last stitch after knitting off old stitch (process step e) is reassigned. 16. The method according to any one of claims 13 to 15, characterized characterized in that the auxiliary needle in one Auxiliary needle bed is moved. 17. The method according to any one of claims 13 to 16, characterized characterized in that the auxiliary needle bed on one Castle carriage is attached. 18. The method according to any one of claims 13 to 17, characterized characterized in that a control device for movement the needle carrying the bind-off stitch on the another needle bed opposite the auxiliary needle bed is seconded. 19. The method according to any one of claims 13 to 18, characterized characterized in that moving the auxiliary needle around at least one needle pitch each by moving of the castle carriage.   20. The method according to any one of claims 13 to 19, characterized characterized in that the auxiliary needle periodically with itself repetitive, predetermined processes is moved. 21. The method according to any one of claims 13 to 20, characterized characterized that a periodically repeating, predefined procedure for transferring, throwing and Expulsion of the auxiliary needle is carried out. 22. The method according to any one of claims 13 to 21, characterized characterized in that the stitch to be decoupled carrying needle with at least one periodically repeating predetermined sequence is moved.