EP0846797B1 - Warp knitting machine with Jacquard-inlay bar - Google Patents

Description

The invention relates to a warp knitting machine with knitting needles that have a predetermined pitch, and at least one jacquard laying bar, the laying needles by actuators of a needle control between two end positions can be moved back and forth by fixed end stops are specified in the direction of the bars.

In known warp knitting machines of this type, any Laying needle from a needle lane into the neighboring needle lane, that is, by a knitting needle division. The two end positions are determined by that the laying needle either on a left or a right end stop is brought to the system. Relocation can be operated by harness cords Pushing elements (DE 40 28 390 A1), by piezoelectric Bending converter (DE 42 26 899 C1) or any other Way. This controllable single needle offset leads in combination with an offset of the whole Jacquard bar for a variety of pattern options.

The invention has for its object a warp knitting machine of the type described in the introduction, which enables an even greater variety of patterns.

This object is achieved in that the end positions a distance equal to twice Needle pitch and that additional stops are provided are by actuators of a stop control are to be made either effective and in their effective position, the laying needles in a middle position hold.

With this construction, each laying needle can have three different ones Positions, namely two end positions and a middle position, and therefore with one of three neighboring needle streets. This enables, especially if the jacquard laying bar via mirror disks, sample gears or the like. offset laterally, a variety of novel Pattern options. For single needle offset the known measures can be retained. Because the forces that move the laying needle from one to the other Shift end position, hold this needle too against the additional one brought into its path of movement Stop that defines the middle position.

It is recommended that the actuators of the stop control transverse to the plane of movement of the laying needles are relocatable. This allows a mechanical one very easy control of the additional stops.

In a preferred embodiment, it is ensured that that the additional stops the laying needle reach around fork-like and at the end of a two-armed Lever are attached and that an abutment from Actuator optionally in the path of the other lever end can be introduced.

Another preferred alternative is that a block that goes from the actuator into a front and a rear position is shiftable, in the front part a front track between the one stop and a first additional stop, in the rear part a rear track between the other end stop and a second additional stop and one of the additional stops limited transition between the tracks.

It is favorable that the actuators of the needle control are first piezoelectric bending transducers with one end are held bar-tight and at the free end carry a laying needle. Such bending transducers are proportionate little space, so that the Place the actuators of the stop control well to let.

It is recommended that the first bending transducer in a left and a right deflection position are switchable. The bending transducers are therefore included even force on the end stops and with something force pressed against the additional stops.

It is advantageous that the actuators of the stop control second piezoelectric bending transducers are which are held with one end and with the act free end on the additional stops. These actuators can also be arranged to save space.

In particular, the second bending transducers can be free End the abovementioned abutment or the abovementioned Wear block.

Barrier-proof cross stops preferably limit the Stroke of the second bending transducer. These cross stops prevent that the forces exerted by the bending transducers be transferred to the laying needles. So be excessive material stress and wear avoided.

It is also recommended that the second bending transducer in a front and a rear deflection position are switchable. This results in clear relationships the control.

The second bending transducers are preferably between the Carrier of the bar and the first bending transducers arranged. The second bending transducers can with their flat side close to the carrier and hardly take up any additional space. For the The width of the strip-shaped bending transducer is three Needle sizes are available because each lay needle can take three different positions.

It is also convenient that two types of on the bar segments to be fastened are provided a predetermined number of first and second bending transducers, respectively wear. The segments allow the first and second bending transducer outside the warp knitting machine to assemble and after installation via cable bundle to connect with the rest of the stop control.

In particular, the segments 16 can be 16 or 16 second Wear bending transducers. Such units can be operate particularly well with digital control mechanisms.

An optimal patterning option is obtained when there are at least three jacquard laying bars. Then all needle lanes can be controlled with jacquard Laying needles are occupied.

It is particularly favorable that the neighboring middle positions have a distance equal to four times the needle. This allows even with only half Jacquard needle number to work. In this case four jacquard bars for the full machine fineness needed.

Fig. 1

einen Querschnitt durch eine Jacquard-Legebarre bei einer erfindungsgemäßen Kettenwirkmaschine,

Fig. 2

eine Vorderansicht der Jacquard-Legebarre der Fig. 1,

Fig. 3

eine geänderte Ausführungsform in einem Fig. 1 entsprechenden Querschnitt,

Fig. 4

eine Teildarstellung mit der Legenadel in der einen Endstellung,

Fig. 5

eine Teildarstellung mit der Legenadel in der anderen Endstellung,

Fig. 6

eine weitere Abwandlung in einem Querschnitt ähnlich der Fig. 1,

Fig. 7

die Ausführungsform der Fig. 6 in räumlicher Darstellung,

Fig. 8

den Legebarrenbereich einer erfindungsgemäßen Kettenwirkmaschine und

Fig. 9

eine Draufsicht auf ein Segment mit zugehörigen Biegewandlern.

The invention is explained in more detail below with reference to preferred exemplary embodiments illustrated in the drawing. Show it:

Fig. 1

3 shows a cross section through a jacquard laying bar in a warp knitting machine according to the invention,

Fig. 2

2 shows a front view of the jacquard laying bar of FIG. 1,

Fig. 3

2 shows a modified embodiment in a cross section corresponding to FIG. 1,

Fig. 4

a partial view with the laying needle in one end position,

Fig. 5

a partial view with the laying needle in the other end position,

Fig. 6

a further modification in a cross section similar to FIG. 1,

Fig. 7

6 in a spatial representation,

Fig. 8

the bar area of a warp knitting machine according to the invention and

Fig. 9

a plan view of a segment with associated bending transducers.

1 and 2 is a jacquard laying bar 1 with a carrier 2 illustrated. A first bending transducer unit 3 has an angular segment 4, which is connected to the carrier 2 via a connecting piece 5 is. The segment carries 16 first piezoelectric ones Bending transducer 6, each at its free end Have laying needle 7. A second bending transducer unit 8 also has an angular segment 9 which is attached to the carrier 2 by a screw 10. The Segment carries 16 second piezoelectric bending transducers 11, which have an abutment 12 at the free end. Cable bundles 13 and 14 serve the bending transducer units 3 and 8 after installing segments 4 and 9 on Carrier 2 with the associated control devices connect.

On the support 2 there are left end stops 13 and right end stops 14 provided to which the laying needles 7 create under the influence of the associated bending transducer 6 can, like this for the middle of the three laying needles is shown in Fig. 2. Additional stops 15 and 16 are at the lower end of a two-armed lever 17th attached, which around a bar-fixed pivot point 18th is pivotable and with its upper end 19 into the Area of the abutment 12 protrudes. 1 illustrated position of the second bending transducers 11 the abutment 12 does not affect the lever 17. He is therefore from the associated laying needle 7 when actuated of the bending transducer 6 taken loose, like this the middle lever 17 is shown in FIG. 2. If against the abutment 12 by pressing the second Bending transducer 11 into the path of movement of the lever end 19th is shifted, the lever 17 is stopped. Now are the additional stops 15 and 16 effective to the Hold needle 7 in the middle position. Will the Laying needle from the right end stop 14 to the left end stop 13 moves there, it is the additional stop 15, which fixes the needle (right laying needle 7 in Fig. 2). In contrast, the laying needle 7 from the left end stop 13 towards the right end stop 14 moves, the right additional stop 16 is effective (Left laying needle 7 in Fig. 2).

a) Wenn der Block 120 sich in der vorderen Stellung befindet, kann sich die Legenadel 7 entweder am Endanschlag 113 oder durch Betätigen des zugehörigen Biegewandlers 6 an den der Mittelstellung entsprechenden zusätzlichen Anschlag 116 anlegen.

b) Wenn der Block 120 sich in der hinteren Stellung befindet, kann sich die Legenadel 7 entweder an den Endanschlag 114 oder an den der Mittelstellung entsprechenden zusätzlichen Anschlag 115 anlegen.

c) Wenn die Legenadel 7 zwischen den beiden Endstellungen wechseln soll, müssen gleichzeitig die zugehörigen Biegewandler 6 und 111 betätigt werden, so daß die Legenadel 7 den Übergang 123 durchquert.

In the embodiment of FIGS. 3 to 5, the same reference numerals are used for identical parts and reference numerals increased by 100 for functionally identical parts. It is essential here that a block 120 is attached to the free end of each of the second bending transducers 111, which block can be moved by the bending transducer 111 into a front position (FIG. 4) and into a rear position (FIG. 5). The block has in the front part a front track 121, which is delimited by a first fixed end stop 114 and an additional stop 115, a rear track 122, which is delimited by an end stop 113 and an additional stop 116, and a transition 123 from one train to the other. There are three options for operation:

a) When the block 120 is in the front position, the laying needle 7 can rest either on the end stop 113 or by actuating the associated bending transducer 6 on the additional stop 116 corresponding to the middle position.

b) When the block 120 is in the rear position, the laying needle 7 can rest either on the end stop 114 or on the additional stop 115 corresponding to the middle position.

c) If the laying needle 7 is to change between the two end positions, the associated bending transducers 6 and 111 must be actuated at the same time so that the laying needle 7 crosses the transition 123.

6 and 7 correspond to the embodiment 3 to 5. In addition, the carrier 102 Cross bars 124 are provided, the grooves 125 with cross stops 126 and 127 forming side surfaces. Lateral cantilevers 128 engage in these grooves free end of the second bending transducer 111. By this Cross stops 126 and 127 is the transverse movement of the Blocks 120 defined from front to back and vice versa. No forces of the bending transducers act in block 120 111 on the laying needle 7, which has a long service life guaranteed.

8 shows three jacquard laying bars 101, each have a structure according to FIGS. 3 to 5. With these three laying bars, the laying needles 7 are like this staggered against each other that - if everyone Laying needles 7 are in the middle position - everyone A laying needle is assigned to Nadelgasse. These three Laying bars are fixed to the machine frame by a bridge 30 connected, the relative swinging motion through the knitting needles. It is also possible, each laying rail in the longitudinal direction to be offset by an offset control unit. Likewise it is possible to use the ingot package with fixed knitting needles to swing.

In the embodiment according to FIG. 9 there is a bending transducer unit 3 with associated segment 4, which carries a total of 16 first bending transducers 6. These are via a bundle of conductors 31 with a 17-pin connector 32 connected. Behind it is indicated that 16 second Bending transducers 111 are provided which block 120 Taxes. These bending transducers are via bundle 33 connected with a 17-pin connector 34. Hint knitting needles 35 are illustrated, by the Alleys 36 swing the laying needles 7 through. If all Laying needles 7 are in the middle position every fourth alley 36 is covered with a laying needle 7. With four of the same design, but each with a needle pitch staggered laying needles 7 can be achieve that all needle lanes 36 at the same time can be occupied.

Of the illustrated embodiments, in deviated in many ways without the basic idea to leave the invention. In particular can the laying needles 7 also displaced in other ways are considered by piezoelectric bending transducers, for example with push pins or sinkers and return springs. Also the control of the additional stops can be done purely mechanically.

Claims (16)

1. Warp knitting machine with knitting needles, which have a predetermined division, and with at least one Jacquard guide bar (1), the guide needles (7) of which are capable of being moved back and forth by means of actuators of a needle control between two end positions predetermined by limit stops (13, 14) which are fixed in the bar direction, characterized in that the end positions are at a mutual distance equal to double the needle division, and in that additional stops (15, 16; 115, 116) are provided, which are to be made selectively active by means of actuators (8) of a stop control and, when in their active position, hold the guide needles (7) in a middle position.
2. Warp knitting machine according to Claim 1, characterized in that the actuators (8) of the stop control are displaceable transversely to the plane of movement of the guide needles (7).
3. Warp knitting machine according to Claim 1 or 2, characterized in that the additional stops (15, 16) engage around the guide needle (7) in a fork-shaped manner and are mounted on the end of a two-armed lever (17), and in that an abutment (12) is capable of being introduced selectively into the path of the other lever end (19) by the actuator.
4. Warp knitting machine according to Claim 1 or 2, characterized in that a block (120), which is displaceable into a front and a rear position by the actuator, has in the front part a front track (121) between one limit stop (114) and a first additional stop (115), in the rear part a rear track (122) between the other limit stop (113) and a second additional stop (116) and a transition (12) between the tracks (121, 122) which is limited by the additional stops (115, 116).
5. Warp knitting machine according to one of Claims 1 to 4, characterized in that the actuators of the needle control are first piezoelectric bending transducers (6) which at one end are held fixedly relative to the bar and at the free end carry a guide needle (7).
6. Warp knitting machine according to Claim 5, characterized in that the first bending transducers (6) are capable of being switched into a left-hand and into a right-hand deflection position.
7. Warp knitting machine according to one of Claims 1 to 6, characterized in that the actuators of the stop control are second piezoelectric bending transducers (11; 111) which at one end are held fixedly relative to the bar and at the free end act on the additional stops (15, 16; 115, 116).
8. Warp knitting machine according to Claims 3 and 7, characterized in that the second bending transducers (11) carry at the free end the abutment (12).
9. Warp knitting machine according to Claims 4 and 7, characterized in that the second bending transducers (111) carry at the free end the block (120).
10. Warp knitting machine according to one of Claims 7 to 9, characterized in that transverse stops (126, 127) fixed relative to the bar are provided, which limit the stroke of the second bending transducers (111).
11. Warp knitting machine according to one of Claims 7 to 10, characterized in that the second bending transducers (111) are capable of being switched into a front and a rear deflection position.
12. Warp knitting machine according to one of Claims 5 to 11, characterized in that the second bending transducers (11; 111) are arranged between the carrier (2; 102) of the guide bar and the first bending transducers (6).
13. Warp knitting machine according to one of Claims 5 to 12, characterized in that two types of segments (4, 9) are provided, which are to be fastened to the guide bar (1) and carry a predetermined number of first (6) and second (11) bending transducers respectively.
14. Warp knitting machine according to Claim 13, characterized in that the segments (4, 9) carry 16 first and 16 second bending transducers respectively.
15. Warp knitting machine according to one of Claims 1 to 14, characterized in that there are at least three Jacquard guide bars (101).
16. Warp knitting machine according to one of Claims 1 to 15, characterized in that the adjacent middle positions are at a mutual distance equal to four times the needle division.

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