EP0563422B1 - Wire-pulling device - Google Patents

Description

The invention relates to a wire drawing device, in particular for use in wire enamelling systems, in which wire drawn from an unwinding device is guided several times around spaced-apart, axially parallel wire guide roller blocks, when circulating around these wire guide roller blocks this passes through the processing stations of the wire enamelling system several times and is then removed from the wire guide roller blocks.

Such wire drawing devices are known. In DE-37 27 976 C1 a wire drawing device is described, in which a laying beam is used to place the wires to be coated on the wire guide roller blocks of the wire coating system, which is mounted on a belt running around these blocks and carries a carriage which is in an am Straight beam located straight guide is displaceable transversely to the direction of movement of the laying beam and is moved by a mechanical switch arrangement after each full revolution of the laying beam by such a distance that is necessary to place the wire attached to the carriage or several wires attached to the carriage in the subsequent rotation of the laying beam in the following free groove or, in the case of several wires, in the following free grooves of the roller blocks.

The invention has for its object to improve a wire drawing device of the type mentioned in such a way that the device in particular requires less maintenance, has an improved service life and requires less manufacturing effort compared to the known device.

The object is achieved by the characterizing features of claim 1. Advantageous embodiments of the invention are the content of the characterizing features of claims 2 to 4.

According to the invention, the wire pulling device comprises wire guide roller blocks, at least one deflection roller being mounted coaxially to the wire guide roller blocks in front of at least one of the respective end faces. A wire guide device is guided around the deflection roller, on which a wire holder for a wire end is provided. Furthermore, seen in the wire running direction, a wire transfer device is provided in front of at least one of the wire guide roller blocks and axially parallel to this.

In a preferred embodiment, the deflecting rollers are formed by tape rolls and the wire guide device by an endless belt, so that the endless belt is guided so that it cannot be twisted. In an advantageous development of the invention, the fastening part for the wire holder is arranged on the outside of the endless belt. In addition, the fastening part can be developed in such a way that it has a laterally discharging fastening device, by means of which the wire during a belt circulation in the Position of the last passage on the wire guide roller block can be stored.

Another embodiment of the invention is that the tape roll, which is located in front of a driven wire guide roller block, can be coupled to this. In a further embodiment, the wire guide roller block is characterized on its circumference transversely to the axial direction by parallel guide grooves which have a certain, equal distance from one another.

Furthermore, the device can comprise wire conversion devices, which are designed as eccentrically mounted, single-thread spindles that have a pitch that corresponds to the distance between two guide grooves on the wire guide blocks. In a further embodiment, the wire guide roller blocks can have smooth peripheral surfaces, the wire conversion device being formed by wire conversion rollers. The wire transfer rollers are in this case mounted centrally and axially displaceable and are characterized on their circumference transversely to the axial direction by parallel guide grooves which have a certain equal distance from one another. In addition, the wire transfer devices here can consist of a centrally mounted core with parallel guide grooves on its circumference transverse to the axial direction with certain, equally spaced spacings and a half-open threaded hollow spindle rotatably mounted about this core. The pitch of the threaded hollow spindle is advantageously equivalent to twice the distance between two guide grooves of the core.

The manufacturing cost of the wire pulling device according to the invention is reduced compared to the known wire pulling devices, since relatively simple components are used, which are also inexpensive to manufacture.

The higher wear and tear associated with the known wire retraction devices due to the multiple sliding guides and the associated susceptibility to faults can be almost completely eliminated by the new solution principles.

Fig. 1

eine perspektivische Ansicht einer Drahteinziehvorrichtung,

Fig. 2

eine Seitenansicht gemäß Fig. 1,

Fig. 3

eine Draufsicht gemäß Fig. 1,

Fig. 4

ein zweites Ausführungsbeispiel in perspektivischer Ansicht,

Fig. 5

eine Seitenansicht gemäß Fig. 4,

Fig. 6

eine Draufsicht gemäß Fig. 4,

Fig. 7

ein drittes Ausführungsbeispiel mit Gewinde-Hohlspindel in perspektivischer Ansicht,

Fig. 8

eine Seitenansicht gemäß Fig. 7; und

Fig. 9

eine Draufsicht gemäß Fig. 7.

The invention will be explained in more detail below using three exemplary embodiments in conjunction with FIGS. 1 to 9. In it show:

Fig. 1

1 shows a perspective view of a wire drawing device,

Fig. 2

2 shows a side view according to FIG. 1,

Fig. 3

2 shows a top view according to FIG. 1,

Fig. 4

a second embodiment in perspective view,

Fig. 5

4 shows a side view according to FIG. 4,

Fig. 6

4,

Fig. 7

A third embodiment with a threaded hollow spindle in a perspective view,

Fig. 8

a side view of FIG. 7; and

Fig. 9

7 shows a plan view according to FIG. 7.

1 to 3 show a first exemplary embodiment in a perspective view.

In order to place the wire 10 around the wire guide roller blocks 2, 3 and 4, the beginning of the wire is fixed on the fastening part 8. The fastening part 8 is firmly connected to the endless belt 1, which is guided over the belt rollers 5, 6 and 7, which are mounted coaxially to the wire guide roller blocks 2, 3 and 4 in front of their end faces. The tape roll 7 can be coupled to the driven wire guide roller block 2 so that it can be driven by it.

In the starting position, the fastening part 8, as seen in the wire running direction, is located immediately after the wire guide roller block 5. The eccentrically rotatably mounted wire transfer rollers 9 and 11, which are designed as threaded spindles and have a thread pitch that correspond to the distance between two guide grooves on the wire guide blocks 2 and 3 are rotated so that the wire to be drawn in does not touch the spindles.

After attaching the beginning of the wire to the fastening part 8, the endless belt 1 is put into circulation by switching on the driven wire guide roller block 2 and the band roller 7 coupled thereto, as a result of which this places the trailing wire in the last grooves of the wire guide blocks 2 and 3. After a full revolution of the endless belt 1, the eccentrically mounted wire transfer rollers 9 and 11, which are designed as threaded spindles, are now rotated by one full rotation, so that the eccentric movement of the wire rotating in the guide grooves of the wire guide roller blocks 2 and 3 from the last grooves of the wire guide blocks 2 and 3 lifted out, laterally shifted by the groove pitch by a groove distance and then lowered again, so that it changes from the last guide grooves to the ones in front. As a result, the last guide grooves on the wire guide roller blocks 2 and 3 are free for placing further wire, and the process described above can be repeated, depending on the desired number of passes.

4 to 6, a second embodiment of the invention is shown.

The wire guide roller blocks 2, 3 and 4 are designed here as cylindrical rollers with smooth peripheral surfaces. The wire guide roller blocks 9 and 11, which are arranged in the wire running direction and in front of the wire guide roller blocks and axially parallel to them, are centrally mounted and axially displaceable and have parallel guide grooves on their circumference transverse to the axial direction with an equal distance from one another, determined by the requirements of the wire coating system.

In the starting position, the fastening part 8, as seen in the wire running direction, is again immediately after the wire guide roller block 4. The wire transfer rollers 9 and 11 are moved axially outward at the start of the wire feed, so that the first guide grooves are located exactly under the wire fixed to the fastening part 8 come to lie. If the band 1, driven by the wire guide roller block 2 and the band roller 7 coupled to it, is set in motion, the fastening part 8 pulls the wire beginning fixed on it behind it and places it around the wire guide roller blocks 2, 3 and 4 and into the first guide grooves of the wire transfer rollers 9 and 11. After one revolution of the belt 1, the wire transfer rollers 9 and 11 are shifted inwards by the distance which corresponds to the distance between two guide grooves on the wire transfer rollers 9 and 11.

As a result, the wire is axially displaced by one groove spacing on each wire circulation on the wire guide roller blocks, and the next free guide grooves of the wire transfer rollers 9 and 11 are made available for a further wire passage. The process described can be repeated according to the desired number of swipes.

7 to 9 show a third exemplary embodiment.

As in the second embodiment, the wire guide roller blocks 2, 3 and 4 have smooth peripheral surfaces. The wire transfer rollers 9 and 11 consist of a centrally mounted core 12 with parallel guide grooves located on its circumference transversely to the axial direction with certain, for. B. dependent on the wire enamelling, mutually equal distances and a centrally rotatable about this core 12, half-open threaded hollow spindle 13, the pitch of which corresponds to twice the distance between two guide grooves of the core 12.
In the starting position, the fastening part 8, as seen in the wire running direction, is again immediately after the wire guide roller block 4. The rotatably mounted, half-open threaded hollow spindles 13 of the wire transfer rollers 9 and 11 are rotated so that the wire to be drawn in does not touch them and that the latter is at the first Circulation of the belt 1 can be inserted into the guide grooves of the cores 12 of the wire transfer rollers 9 and 11 which are exposed beneath it. After the first revolution of the belt 1, the threaded hollow spindles 13 of the wire transfer rollers 9 and 11 are rotated by one full revolution. As a result, the wire lying in the guide grooves of the cores 12 of the wire transfer rollers 9 and 11 is gripped by the thread grooves of the two threaded hollow spindles 13, lifted out of the current guide grooves and axially offset by the pitch of the thread groove and into the guide grooves of the cores 12 next to them Wire transfer rollers 9 and 11 lowered. Thus, the last guide grooves of the cores 12 of the wire transfer rollers 9 and 11 are free for the next passage or the wire wound around the wire guide roller blocks 2, 3 and 4 axially changes its position by a guide groove distance and the process described above can, according to the desired number of Swings, to be repeated.

By linking the different functions, e.g. B. the attachment of the wire to the fastener 8, the commissioning of the tape 1 by coupling with the driven wire guide roller block 2, the twisting or axial displacement of the wire transfer rollers 9 and 11 after each tape circulation, etc., a fully automatic operation of the wire pulling device described above is possible.

The invention is not restricted to these exemplary embodiments. In particular, any combination between the different wire guide roller blocks described, e.g. B. with or without guide grooves, and the various types of wire transfer rollers described result in further advantageous variants of the invention.

Claims (11)

1. Wire-pulling device, particularly for a wire lacquering installation, with which wire withdrawn from an unwinding device is passed a number of times around wire guiding roller blocks (2, 3, 4) which are spaced from one another and whose axes are parallel, whereby the wire loops running around the wire guiding roller blocks (2, 3, 4) are maintained at a predetermined, equal spacing from one another and before applying each new loop all the loops already present on the wire guiding roller blocks (2, 3, 4) are shifted in each case by one spacing, characterised in that mounted coaxially with the wire guiding roller blocks (2, 3, 4) in front of at least one of the respective end faces there is at least one guide roller (5, 6, 7), around which is guided a wire guiding device (1), on which a wire holder (8) is provided and that provided in front of at least one of the wire guiding roller blocks (2, 3, 4), seen in the direction of movement of the wire, and with its axis parallel to it, there is a wire transposition device (9, 11).
2. Wire-pulling device as claimed in Claim 1, characterised in that the guide rollers are constituted by belt rollers (5, 6, 7) and the wire guiding device is constituted by an endless belt (1).
3. Wire-pulling device as claimed in Claim 2, characterised in that the endless belt (1) is guided in a twist-resistant manner.
4. Wire-pulling device as claimed in one of the preceding claims, characterised in that the wire holder is constituted by a fastening member (8) arranged on the outer surface of the endless belt (1).
5. Wire-pulling device as claimed in Claim 4, characterised in that the fastening member has a laterally projecting fastening device by means of which the wire may be placed during a rotation of the band into the position of the last passage on the wire guiding roller block.
6. Wire-pulling device as claimed in one of the preceding claims, characterised in that the band roller (7) which is disposed in front of a driven wire guiding roller block (2) may be coupled to it.
7. Wire-pulling device as claimed in Claim 1, characterised in that the wire guiding roller blocks (2, 3) carry parallel guide grooves on their periphery which are transverse to the axial direction and which have a predetermined, equal spacing from one another.
8. Wire-pulling device as claimed in one of the preceding claims, characterised in that the wire transposition devices (9, 11) are constructed as eccentrically mounted single thread threaded spindles which have a pitch which corresponds to the spacing between two guide grooves on the wire guiding blocks (2, 3).
9. Wire-pulling device as claimed in one of Claims 1 to 6, characterised in that the wire guiding roller blocks (2, 3, 4) have smooth peripheral surfaces and the wire transposition device is constituted by wire transposition rollers (9, 11) which are centrally mounted and axially displaceable and on their periphery carry parallel guide grooves with a predetermined, equal spacing from one another transverse to the axial direction.
10. Wire-pulling device as claimed in one of Claims 1 to 6, characterised in that the wire guiding roller blocks (2, 3, 4) have smooth peripheral surfaces and that the wire transposition device (9, 11) comprises a centrally mounted core (12) with parallel guide grooves, which are disposed on its periphery transverse to the axial direction, with predetermined equal spacings from one another and a half open hollow threaded spindle (13) which is mounted to be rotatable centrally about this core (12).
11. Wire-pulling device as claimed in Claim 10, characterised in that the pitch of the hollow threaded spindle (13) corresponds to twice the spacing between two guide grooves on the core (12).

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