DE1806505A1 - Weft thread insertion device for a knitting machine - Google Patents

Abstract

The improvement comprises a cutting organ for cutting the weft thread to correct lengths, joined to the rotary thread guide. The cutting organ is fixed to the thread guide in the zone of the weft thread extending from the thread guide to the knitted fabric. The thread guide pref. consist of scissor pincers. Before being presented to these thread guides the weft threads are directed by separate thread carriers which are mounted in a common movable organ resembling a revolving head. The weft threads are thus presented as desired in a known order and the changing of the weft thread is carried out without the threads becoming entangled.

Description

Dr.lhg.WalterReine «, ¹⁰

405 Mönchengladbach October 31, 1968 1806505

OhlAHw 1 *

Warp knitting machine

Addition to patent ... (application P 17 85 482.9 - ΊΟ O'i8 -)

In the patent ... (application P 17 85 4-82.9 -10 018-) is a warp knitting machine, in particular a Raschel machine described, with a gate direction for entering a weft thread is provided, which over in the area of Holding members arranged outside the needle zone and positioned by means of guide links the warp thread is applied, a thread guide serving to lay the weft thread, which is on a Orbit is guided, on which several weft threads, optionally by means of the holding members, the thread guide for gripping are presented and the holding members at least one the weft thread to be provided on predetermined Associated length-cutting separating member and the weft threads to the opposite holding member feeding thread guides with one thread for each Shot individually gripping gripper is provided.

009838/0708

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In a warp knitting machine designed in this way, the points in the area of the weft thread reversals, that is to say in the area of a web edge by means of the holding members presented to the thread guide individual threads from the thread guide detected during its circulation movement, guided to the holding element on the other web edge, to this Retaining member released, cut by means of the separating member to the length corresponding to the width of the web and individually to the warp threads by means of the guide links be created. This process can be carried out by the thread guide who then returns or by others thread guides guided on the orbit are repeated with the same or a different thread

The present invention relates to an advantageous development the device described above and consists in that the separating member with the rotating thread guide connected is. It can be advantageous that the separating member is in the area of the thread guide is attached to the web extending weft thread on the thread guide.

If, according to a further feature of the present invention, the thread guide is designed as clamping scissors, so are in the thread guide separating and G-reifing organ for the lap

009838/0708

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thread in a nutshell, which is a major simplification .and means increasing the functional reliability during the insertion of the weft thread.

A · diverse possible range τοη patterns on the Raschel machine is then reached tu when multiple and mutually different weft threads can be provided optionally and in any order the yarn guide easily. This is done in a particularly advantageous manner in that the weft threads to be presented to the thread guide are guided through separate thread feeders, which are mounted in a turret-like manner in a common actuator.The turret-like design enables a simple rotary movement to change the weft threads and twist the weft threads to prevent each other.

An advantageous detecting the weft yarn to be inserted '

is by such an arrangement of the holding member and the thread feeder achieves that the weft threads are separated organ presented approximately at right angles to the orbit will.

009838/0708

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? 806505

An embodiment of the invention is in Drawing shown and is described in more detail below.

Show it;

Figure 1 shows a cross section through a Raschel machine in a schematic representation,

FIG. 2 is a view of the Raschel machine from above along the line H-II in Figure 1,

Figure 3 is the same view as Figure 2, but in one other working condition,

Figure 4 shows a drive for "two rotating thread guides,

FIG. 3 shows, in an enlarged representation, the process of feeding the thread to the thread guide,

Figure 6 is a view of Figure 5 along the line VI-VI.

009838/0708

ORiGlNAL INSPECTED

Vie ia main patent, Figure 1 shows a side part 1 of a laachelmaichine with the connecting parts 66, 67 and For the sake of clarity, the cantilevers 700 that can be seen in FIGS. 2 and 3 are shown in this figure ask the pay-off bobbins 530, 531 for the weft threads not shown. Of the partial warp beams 34, 35 guide the warp threads 36, 37 over spring rockers 38, 38 ' to the perforated needles 39 »4-0 and from there to the latch needles 31 · The latch needles 31 are with the needle bar 21 on the Trä-. ger 23 attached, at the end of which the rocker arm 25 is articulated, which is mounted rotatably about the pin 26. The carrier 23 is supported by the main shaft 17 via the lever 20 supported on the cam disk 18. Behind the latch needles 31 that becomes Knitted fabric 28 connected to the side part 1 in a fixed manner Milling plate 27 and the feed rollers 29, 30 wound onto the tree 32.

FIG. 2 shows a view of the Raschel machine from above along the line II-II in FIG. 1, various details of the machine which are not necessary for explaining the present invention and which affect the clarity have been omitted. One recognizes in Figure 2 _f

J-the finished knitted fabric 28, in front of which a row of stitch patterns:

009838/0708

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019

The needles 31 are arranged on the needle bar 21. The weft threads f and f ¹ are drawn off from the delivery bobbins 530 and 531. It can be seen how the thread part f ″ belonging to the weft thread f is presented by the thread guide 613, which is designed as clamping scissors, to a holding element 538, which at the same time serves as a guide element for the weft thread to rest on the warp threads and can be designed, for example, as a suction nozzle As can be seen from Figures 1, 2 and 3, the holding member 538 is attached to an axis 54-0 which can be pivoted by means of a lever arm 541. This lever arm 54-1 rests against the cam disk 543 under the action of the tension spring which is fastened on the main shaft 17. For the sake of clarity, the lever arm 541 is shown broken off in FIG.

The one coming from the weft bobbin 530, initially designed like a revolver head, with thread feeders 632, 633 provided drum head 639 guided and between the Holding members 635, 636 weft thread f lying ready is held by the thread guide, which is also designed as clamping scissors 612 detected.

00983870708

INSPECTED

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- 7 - "TO

The drum head 659 is clearer for the sake of clarity Bars division in the Amsfänrungsbeispiel only with two Thread feeders 632, 633 drawn. But there can also be more load carriers available to them just as many or even more pay-off bobbins are assigned. Depending on the pattern, several threads can go through a thread feeder. The rotary movement of the Irommelkopfes 639 can take place via a gear 3 ^ 5, depending on which movement impulses by the actuator, which is not shown in detail, but is known per se 638 in order to achieve the desired pattern.

In the state of movement shown in FIG. 3, the thread guide 612 with the clamped weft thread f has reached the center of the machine on its orbit, after the weft thread f between the two holding members 636 and 636 has previously been clamped by the thread guide 612 in the position shown in FIG and was severed, as can be seen from the remnant of the thread f ¹ *. The severed piece of weft thread f ″ is held by the holding element 635 by means of the sliding clamp and on the opposite side by the holding element 538 and is made ready for binding. FIGS. 2 and 3 also show that

009838/0708

ORIGINAL INSPECTED

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18G6565

that the axis'60J of the epicyclic gear 600 of the Main drive shaft 17 is driven via shaft 14 in a ratio of 1: 2, because every half revolution of the Axis 603 from the thread guide 612 or 613 each a weft thread is laid ready.

To the epicyclic gear 600 shown in Figure 4 belongs among other things an inner rod part 601, which is rotatable with its axis 603 in the boom 9 (Figure 1) is stored. At the two ends of the inner rod part 601, the outer rod parts 604, 605 are rotatable stored. At the outer ends of the rod parts 604) 605 the thread guides 612, 613 are rotatably mounted. The transfer of the rotary motion to the external Rod parts 604, 605 and the thread guides 612, 613 takes place via drive means 602, 606 and 607. Since the drive the thread guide via drive means 606, 607 in the transmission ratio 1: 2 takes place, the thread guides 6i2 and 613, designed as clamping scissors, point towards the middle Openings 608, .609 always in the same direction, in Figures 2 and 3 always to the left. Also are on the Arms 604, 605 each have two curved tracks 610 »611 * 614 and to recognize, which serve to open and close the thread guides 612, 613 designed as clamping scissors * like is explained with reference to FIGS. 5 and 6.

0Q9833 / 0708

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Finally, the mode of operation of the holding members 634, 635, 636 and 637 can be seen with reference to FIGS. 5 and 6 and that of the thread guide 612 or 613 when inserting a weft thread.

As can be seen from FIG. 5, the holding members 634-, 635-636 and 637 are hook-shaped and are mounted in a gear in such a way that the tips of the hooks always point in the same direction. Consisting of the Figu- Λ ren 2 and 3 to be detected rotational movement of the holding members for the purpose of providing laying the weft thread is introduced from the main shaft 17 via the transmission 3 ^ 5 and the shaft in the mounted on the machine frame housing 354 ·. A driver 349 is fastened to the shaft 348 by means of the disk 348a and cooperates with the disk 353 in the manner of a Maltese cross. The disk 353 is connected via the shaft 355 to the disk 650, in which the axes 651a to 651d are attached, which are rotatably supported in the levers 652a to 652d. These levers 652a to 652d are firmly connected to the holding members 634 to 637, which in turn are rotatably mounted in the cover 357, which in turn is rotatable relative to the housing 354 by means of the ball bearing 356.

009838/0708

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The holding members 634 to 637 are also provided with clamping pins 660, 661, 662 and 663, their clamping position and open position via «in curve piece 664 is controlled.

It can also be seen from FIGS. 5 and 6 that the thread guide 612 can be designed as a clamping pair of scissors, similar to that known from knotters The central part 612a is rotatably mounted on a bolt 670 and receives the pretension required for clamping the weft thread from the compression spring 671. The movement of the central part 612a is controlled by the cam tracks 610, 611 located on the outer rod part 604. The separating element 612a For this purpose, it also has an elongated hole 672 into which the angle lever 673 moved by the cam tracks 610, 611 engages, which in turn is mounted on a bolt 674 and is pressed against the cams 610, 611 via the torsion spring 675.

009838/0708

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As already mentioned) the thread f, which costs from the weft bobbin, is guided through the thread feeder 632 and "wiped by the holding elements 655" 636, is grasped by the thread guide 612 in the movement bust end shown in FIGS. 2, 5 and 6. The previously prepared thread part f * 'is guided by the thread guide 613 along the μ material web and presented to the holding member 538. At the same time, the core member 661 has clamped this thread f '' in the holding member 635 * If the thread guide 612 is now closed by lowering the middle part 612a immediately after the state of movement in FIG fixed between the middle part 612a and the clamping member 612c sticks, while the thread f '' with the French

member 612b is separated so that in the terminal ^

661 only the thread remnant f ^IM gets stuck.

The thread guide 612 can now the thread f from the pay-off bobbin through the holding member 636, whose Hemme 662 is open, pull it through until it is also in the position of the thread guide 613

OHiQ (NAL INSPECTED

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1806565

of Figure 2 arrives. In this state of motion, the Maltese cross gear has rotated the holding elements 634- to 637 counterclockwise by 90 ° according to the arrow A in FIG. The process can now be repeated in that the clamping member 662 clamps the thread in the holding member 636. The clamping of the thread f ″ in the holding member 635 by means of the clamping member 661 has been opened after the thread f ^{11 has been placed} behind the row of needles ^ 1 and meshed.

During the process of capturing and Laying the thread f is the thread f 'of the Thread feeder 633 held in such a position that it is held by the thread guide; 612 cannot be detected. If the weft thread f 'is to be presented instead of the weft thread f' during the next weft presentation, the Drum head 639 rotated by 180 ° so that the thread f is in the position of the thread shown in the figures f arrives. In this case, of course, when the thread guide 612 is closed, the one leading to the material web becomes Thread end of the thread f 'separated during the The thread f remains connected to the web of material until it is to be inserted again as a weft thread.

ORiON INSPECTED

009838/0708

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18-65-5

As already mentioned, the process is only shown with the change of two weft threads to facilitate the overview. However, any number of thread feeders 632, 633 can be distributed around the drum head 639, which are controlled depending on the desired pattern so that the desired threads are presented to the thread guide 612 for detection. To Verzwimungen the ready DETERMINED bearing threads to avoid is to make sure a that the drum head is not 639 always rotated in one direction but back and forth between two extreme positions and can be rotated back. In addition, it is advantageous if, as shown in FIG. 6, the center point 639a of the rotary movement of the drum head is arranged in such a way that the thread length does not change when the weft thread is changed.

It has already been pointed out on several occasions that the invention can also be implemented in other ways can. For example, instead of the rotating holding elements 634 to 637, it is possible to have stationary holding elements to be arranged and the thread laid out along the material web to the material web in the same way transfer, as shown on the other side of the web by means of the holding member 538. Another

009838/0708

Modification possibility of a device produced according to the invention consists.noch that the thread guide 612 and 613 also with separate separating and KIeBmorganen can be equipped. Under certain circumstances, both the thread guides 612, 613 and the holding organs 6 ^ 4- to 637 instead of a mechanical one Clamping element another clamping element, for example a pneumatic clamping element, can be used. Farther it is possible to have the thread feeder 632,633 not concentrically in a drum head, but linearly to be arranged as in the earlier patent ... (Application P 17 85 269.6 -10 0I6-). The various possible modifications of the exemplary embodiment are with the construction of such machines familiar to those skilled in the art, so that a special presentation of these modifications is not required. It is only essential for the present invention that the thread guides 612 and 6I3 Not only grasp the laid-out thread, but also cut it off from the thread part leading to the material web, so that a single thread is always placed ready in front of the web.

mmmh inspected 009838 / 07Of ^0B

Claims (5)

Dr. Ing. Watter Pure 10 -019 Li / ha Mönchengladbach _jr Patent claims 1 warp knitting machine, especially Raschel machine, with a device for inserting a weft thread, which is placed outside the needle zone via holding elements arranged in the area of the web edges and is applied to the warp threads by means of guide links, with the ready to use Weft thread a thread guide * is used, which on a Orbit is guided, on which several weft threads optionally by means of the holding members the thread guide are presented for detection and the holding members at least one weft thread to be provided assigned length cutting separating member and the weft threads to the opposite Retaining member feeding thread guide with a gripping member that grips the thread individually for each shot is provided, according to patent ... (Application Ϊ'17 85482.9 - "ΪΌ 018), characterized in that that the separating element (612b) is connected to the rotating thread guide (612). 009838/0708 JL 2. warp knitting machine according to claim 1, characterized in that the separating member (612b) in the region of the attached from the thread guide (612) to the web (28) extending weft thread öin thread guide is. . 3. Warp knitting machine according to claim 1, characterized in that that the thread guides (612, 613) as clamping scissors are trained. 4. warp knitting machine according to claim 1 to 3 »thereby characterized in that the weft threads to be presented to the thread guides (612, 613) by separate thread feeders (632, 633) are guided, which are mounted like a turret head in a common actuator (638). 5. warp knitting machine according to claim 1 to 4-, characterized by such an arrangement of the holding members (634 to 637) and the thread feeder (6J52, 633), that the weft threads are presented to the separating element (612b) approximately at right angles to the orbit (616). 009838/0708 Le e rs e ι te