EP0889149B1 - Flyer wing - Google Patents

Description

The invention relates to a flyer wing for a roving frame, with a pivotable on a wing arm, consisting of Preßfingerstange and Preßfingerarm Preßfingerblatt Preßfinger whose pivot axis is in the center of the connection of the Preßfingers with the wing arm and the coil center with a predetermined radius (R) rotatable is, wherein the Preßfingerstange outside the radius (R) is located on which the Preßfingerarm is arranged, and the Preßfingerstange is acted upon by transversely to the pivot axis on the Preßfingerstange fasteners acting, and the presser finger can be brought into a tilted position.

In the course of advancing automation in the roving field, the design of the flyer vanes, including the presser fingers, is always subject to new requirements, especially since the variety of automatic bobbin changing is constantly being extended. Bobbin changes can be made by e.g. the bobbin rail is lowered with the coil bobbins in full bobbins and thus extended out of the area of the wings to take the full bobbins out with a in the amount of the bobbin rail entering the roving bobbin receiving system, the full bobbins at their free end sleeve taking out of the machine.

To ensure that the presser finger actually rests after the insertion of empty tubes with its Preßfingerblatt on the sleeve surface, for example, from DE-PS 30 04 165 It is known that a cylinder chamber is located within the wing arm supporting the finger in the area of a known roving tube mounted therein, in which a cylindrical torsion spring surrounding it is arranged at one end with the wing arm and at the other end with the roving. This spring causes a pressing of the Pressing finger on the winding tube. A disadvantage of this solution is that a steady contact pressure on the sleeve or the wound roving is present by the spring when Verminder the sleeves with the thread, which can adversely affect the coil formation and the wound material with increasing coil diameter. In addition, special requirements are placed on the design of the Preßfingers and Preßfingerblattes. Special Abweiskufen and stops must be provided to allow an automatic bobbin change at all.

From the DE 195 43 716 A1 Flyers are known for a roving, which have a Preßfingerstange and Preßfingerarm with Preßfingerblatt existing presser fingers. The press finger rod lying outside a pivot axis can be pivoted from transversely to the pivot axis by means of actuating elements acting on the press finger rod, so that the press finger can be pivoted into a tilted position and held in this position. In this case, the presser finger is swung so far that the full bobbins can be removed from the rotation range of the wings. In order to allow the folding back of the presser fingers for automatic piecing, stops must be provided on the wing arm so that the center of gravity of the presser finger resting against the respective stop is such that pivoting of the presser finger during piecing to the bobbin is ensured.

In the known devices that require a wide opening of the Preßfingers, often creates the problem that the press fingers remain in their pivoted-down position during piecing. The causes of this lie mainly in the fact that the attacks on the wing arm are designed as a rigid attacks. By hard positioning of the press fingers in this particular position is a wear of the contacting components and thus a change in the pivoted position of the Preßfingers in the course of machine operation. As a result of this wear, the focus of the Preßfingers with time is so unfavorable that the Anspinnvorgang no immediate Heranklappen the pressing finger takes place in the Anspinnposition. The inevitable consequence is that due to the small wing spacing (diagonal spacing of the pitch), especially in large coil formats, the press fingers engage and are thus destroyed.

The object of the invention is to develop a flyer wing of the type described above so that a wide opening of the Preßfingers for the bobbin change is made possible and the presser fingers for the automatic piecing is automatically guided to the empty tube, without the presser fingers by a contact pressure to the sleeve or coil to load.

This object is achieved according to the invention that at least one spring element is provided on the wing arm, the spring force of which acts on the press finger only in a swivel range thereof in which the press finger blade is outside the maximum circumference of the coil. The spring force of the spring element acts only on the pressing fingers when the Preßfingerblatt is lifted or pivoted away from the maximum wound coil. In the operating state of the roving machine, in which the coil winding is terminated with maximum coil circumference and the automatic bobbin change can begin, the presser finger leaf is still spring loaded on the bobbin surface. In order to remove the coil from the rotation range of the wing, the presser must be beweget in a suitable position for the coil removal. For this purpose, the Preßfingerstange is acted upon by actuators and pivoted against the spring force of the spring element about its pivot axis, so that the force applied to the coil Preßfingerblatt is pivoted away from the coil circumference and the coil surface. If the Preßfingerstange released by the actuators, the spring force of the spring element causes a return of the Preßfingers in the position corresponding to the concerns of Preßfingerblattes at the maximum coil circumference. Thus, the presser finger is due to its lying in the presser bar center of gravity in a position that ensures an immediate pivoting of the presser finger to the bobbin during piecing. At the same time is achieved with the flyer invention wings that the coil is not adversely affected during the Bewicklungsvorganges by additional Preßfingerdruck.

Fig. 1

eine schematische Ansicht eines Flyerflügels mit aus Preßfingerstange und Preßfingerarm mit Preßfingerblatt bestehenden Preßfinger;

Fig. 2

eine schematische Seitenansicht auf den Flügelarm 1 nach Fig. 1;

Fig. 3

eine schematische Unteransicht auf die Spule und Flügelarme;

Fig. 4

einen Flügelarm mit Preßfinger, oberhalb des Klemmstückes geschnitten;

Fig. 5

eine Befestigung des Haltestabes an der unteren Befestigungsöse;

Fig. 6

ein Klemmstück mit integriertem Federelement.

The invention will be explained with reference to exemplary embodiments, which are at least schematically apparent from the drawing. In the drawing show:

Fig. 1

a schematic view of a flyer wing with Preßfingerstange and Preßfingerarm with Preßfingerblatt existing presser fingers;

Fig. 2

a schematic side view of the wing arm 1 after Fig. 1 ;

Fig. 3

a schematic bottom view of the coil and Trowel arms;

Fig. 4

a wing arm with press fingers, cut above the clamping piece;

Fig. 5

an attachment of the retaining rod to the lower attachment eye;

Fig. 6

a clamping piece with integrated spring element.

In Fig. 1 For example, there is shown schematically a spinning lobe for a roving machine having a roving arm 1 (not shown) and a counterweight wing arm 2. On the wing arm 1 of the Preßfingerstange 4 and Preßfingerarm 5 with Preßfingerblatt existing 6 presser fingers 3 is pivotally mounted. The pivot axis 7 is in the center of the connection of the presser finger 3 with the wing arm 1 and is rotatable about the coil center 16 with a predetermined radius R, wherein the presser finger 4 is outside the pivot axis 7. Preßfinger 3 and wing arm 1 each have eyelets 8, 9, through which a holding bar 12 is guided for connecting the Preßfingers 3 and the wing arm 1. The retaining bar 12 has at its one end a fastening tab 11, with which the retaining bar 12 is held against rotation on the lower attachment eye 8 of the wing arm 1. The other end of the support rod 12 opens into a resting on the uppermost attachment eye 8 of the wing arm 1 clamping piece 10 and is firmly clamped or clamped in this. In order to establish the connection between the wing arm 1 and the presser finger 3, the retaining bar 12 is first inserted through the lower eyelets 8, 9, then through an example plastic sleeve 13 and then through the upper eyelets 8, 9. After the retaining bar 12 is fixed with its fastening tab 11 at the desired location on the lower attachment eye 8, the clamping piece 10 is placed on the upper end of the holding rod 12 and clamped by means of set screws (not shown) in the clamping piece 10.

As well as out Fig. 2 it can be seen, connects to the acting as a counterweight presser bar 4 below the wing arm 1 of the curved Preßfingerarm 5 with Preßfingerblatt 6 on. The upper end of the Preßfingerstange 4 has a pointing to the clamping piece 10 curvature. When the presser finger is rotated (not shown) by actuators (not shown) acting on the presser bar 4, the upper curved end of the presser bar 4 abuts against the clamp 10 which is spaced from a stop 14 on the wing arm 1 by a distance A. If the presser finger 3 is in this position, the center of gravity of the presser finger 3 is still outside the radius R.

As an alternative to the curvature at the upper end of the presser-finger bar 4, a stop protruding from the press-finger bar 4, e.g. be welded, which abuts against the clamping piece 10 and presses against this when the presser finger 3 is rotated.

In Fig. 3 three different presser finger positions are shown, which occur during the machine run. As position 1, the Anspinnlage is designated, in which the presser finger 3 is pivoted inwardly such that the Preßfingerblatt 6 abuts the empty tube 15. With increasing Spulenbewicklung the presser fingers 3 together with Preßfingerarm 5 and Preßfingerblatt 6 is moved to the outside and is after completing Spulenbewicklung with maximum coil circumference in position 2. Here, the Preßfingerblatt 6 is due solely to the coil surface, because the focus of the press fingers 3 still always located outside the radius R. The pressing finger 3 is pressed by no additional spring elements to the coil, since this can adversely affect the quality of the wound roving. In order to remove the coil in example of the embodiment in which the coils hang on the center pin of the wing from the rotation range of the wing, the presser finger 3 must be pivoted so far that the Preßfingerarm 5 at least between position 2 and position 3, but preferably is in position 3, that is, the outermost edge of the Preßfingerblattes 6 is at least outside the maximum coil circumference region or is in line with the inside of the wing arm 1. If the Pressing finger 4 acted upon by actuating means (not shown), the Preßfingerarm 5 is moved to position 3. Between position 2 and position 3, the press finger 3 strikes with its upper curvature first on the clamping piece 10, Fig. 2 , At this moment, the focus of the Preßfingers 3 is still outside the radius R. To then finally reach the position 3, that presses on the clamping piece 10 (FIG. Fig. 2 ) adjoining end of the presser finger bar 4 against the clamping piece 10 and twisted this by the distance A while twisting the holding bar 12 (FIG. Fig. 2 ). Only in this position 3 is the focus of the Preßfingers 3 within the radius R. Only in the pivoting range in which the center of gravity of the Preßfingers 3 is within the radius R or the Preßfingerblatt 6 is outside the maximum coil circumference, the spring force acts, If the presser finger 3 is relieved of the actuators (not shown), the presser finger 3 is pushed back into position 2 by the clamp 10 turned back from the support bar 12 and thus is located in a situation in which the presser finger 3 automatically moves into the piecing position during automatic piecing due to its center of gravity when the blade rotational movement starts as a result of the centrifugal force.

In Fig. 4 the presser finger 3 is shown in position 2 already described. The wing arm 1 is cut above the clamping piece 10. From this schematic illustration it can be seen that the upper curved end of the Preßfingerstange 4 has a distance C to the resting on the upper attachment eye 8 of the wing arm 1 clamping piece 10. If the presser finger 3 is acted upon in the direction of arrow B, the presser finger 3 is pivoted about the axis 7 and the curved end of the Preßfingerstange 4 is moved toward the clamping piece 10 until the end of the Preßfingerstange 4 abuts the clamping piece 10. Upon further opening of the Preßfingers 3 then presses the end of the Preßfingerstange 4 so against the clamping piece 10, that it by twisting the trapped Haltestabes 12 is twisted. In this case, the distance A determines the Verdrehweg of the clamping piece 10 and thus the spring-loaded Einschwenkweg the Preßfingers. 3

In Fig. 5 the attachment of the retaining bar 12 is shown enlarged. The lower end of the support rod 12 has a U-shaped bent fastening tab 11 which is pushed to the lower attachment eye 8 of the wing arm and thereby the support rod 12 is held against rotation. In the embodiment in which the clamping piece 10 bears against the stop of the wing arm 1 without a distance A, the fastening tab is arranged (not shown) so that upon pivoting of the presser finger 3 of the Preßfingerarm 5 abuts the fastening tab 11 (position 2), and as soon as the presser finger 3 is turned into a range (position 3) in which the center of gravity of the presser finger 3 lies within the radius R or the presser finger blade 6 is outside the maximum coil circumference, the fastening tab 11 is twisted by twisting the support rod 12.

Another embodiment of the stop member 18 and the clamping piece is in Fig. 6 shown. In this embodiment, the stop member 18 has a spring element 17 and is arranged without spacing A on the upper attachment eye on the wing arm 1. Until the stop of the upper end of the Preßfingerarmes 4 to the spring element 17, the center of gravity of the Preßfingers 3 is outside the radius R. Only when the Preßfinger 3 is pressed against the spring force of the spring element 17 against the spring element 17, the center of gravity of the Preßfingers 3 comes within of the radius R. The spring element 17 in Fig. 6 is a spring-mounted in a bushing ball, which can be pressed against its spring force in the socket. If the presser finger 3 is released by the actuating elements, the presser finger 3 is pushed back by the ball pressed by the spring out of the bush into the position in which the center of gravity of the presser finger 3 lies outside the radius R.

Claims (1)

1. Flyer wing for a roving machine, with a press finger which is arranged pivotably on a wing arm and consists of a press-finger bar and press-finger arm with a press-finger leaf and the pivot axis of which lies at the centre of the connection of the press finger to the wing arm and which is rotatable about the bobbin centre with a predetermined radius (R), the press-finger bar lying outside the radius (R) and having arranged on it the press-finger arm with a press-finger leaf, and the press-finger bar being capable of being acted upon by actuation elements acting on the press-finger bar transversely to the pivot axis, and the press finger being pivotable into a pivoted-away position, characterized in that the wing arm (1) has provided on it at least one spring element (12, 17), the spring force of which acts on the press finger (3) solely in a pivoting range thereof in which the press-finger leaf (6) is outside the maximum bobbin circumference.

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