Abstract
A slot drum for a winding machine for traversing a yarn has a drum body including a first half and an adjacent second half, the drum body held in a rotationally fixed manner on a drum shaft. The adjacent first and second halves defining a yarn guide slot that extends around the drum body. The first and second halves include a side shield, a cylindrical jacket, and a hub for mounting on the drum shaft. The first half is displaceable on the drum shaft in a direction of the drum axis via an actuator. The first half rotates relative to the second half as the first half moves in the direction of the drum axis.
Claims
1-11. (canceled)
12. A slot drum for a winding machine for traversing a yarn, comprising: a drum body comprising a first half and an adjacent second half; a drum shaft with a drum axis, wherein the drum body is held in a rotationally fixed manner on the drum shaft; the adjacent first and second halves defining a yarn guide slot therebetween that extends around the drum body; each of the first and second halves comprising a side shield, a cylindrical jacket, and a hub for mounting on the drum shaft; the first half displaceable on the drum shaft in a direction of the drum axis; an actuator configured with the first half to move the first half on the drum shaft; and wherein the first half rotates relative to the second half as the first half moves in the direction of the drum axis.
13. The slot drum according to claim 12, comprising a rotary drive configured with the first half and independent of the actuator, the rotary drive configured to rotate the first half as the first half moves in the direction of the drum axis.
14. The slot drum according to claim 12, wherein the drum shaft comprises a guide groove defined therein, and the first hub comprising a guide pin that engages in the guide groove.
15. The slot drum according to claim 12, wherein the actuator is connected to the hub of the first half.
16. The slot drum according to claim 15, wherein the actuator comprises a pneumatic cylinder or an electric drive.
17. The slot drum according to claim 15, wherein the actuator is connected to the hub of the first half via a driver that is rotatably held on the hub of the first half.
18. The slot drum according to claim 12, further comprising a coupling connection between the drum shaft and the first half.
19. The slot drum according to claim 18, wherein the coupling connection is arranged between the drum shaft and the hub of the first half.
20. The slot drum according to claim 12, wherein rotation of the drum shaft or of the drum body about the drum axis is locked when the first half is moved away from the second half along the drum axis.
21. The slot drum according to claim 12, wherein movement of the first half along the drum axis provides a space of at least 10 mm between the first and second halves along the yarn guide slot.
22. A winding machine, comprising: the slot drum according to claim 12; and a protective cover, wherein the first half automatically moves along the drum axis away from the second half when the protective cover is opened.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Further advantages of the invention are described in the following exemplary embodiment. In the figures:
[0027] FIG. 1 shows a schematic view of a slot drum according to the prior art;
[0028] FIG. 2a shows a schematic view of a first embodiment of a slot drum according to the invention in the closed state;
[0029] FIG. 2b shows a schematic view of a first embodiment of a slot drum according to the invention in the open state;
[0030] FIG. 3 shows a schematic representation of a longitudinal section of a second embodiment of a slot drum according to the invention in the open state;
[0031] FIG. 4 shows a schematic representation of an embodiment of an actuator for opening the slot drum; and
[0032] FIG. 5 shows a schematic representation of a side view of a slot drum according to the invention.
DETAILED DESCRIPTION
[0033] Reference will now be made to embodiments of the invention, one or more examples of which are shown in the drawings. Each embodiment is provided by way of explanation of the invention, and not as a limitation of the invention. For example features illustrated or described as part of one embodiment can be combined with another embodiment to yield still another embodiment. It is intended that the present invention include these and other modifications and variations to the embodiments described herein.
[0034] FIG. 1 shows a schematic top view of an embodiment of a slot drum according to the prior art. The slot drum consists of a drum body 1, which is composed of a first half 2 and a second half 3. The first half 2 has a first side shield 4 and a first jacket 6 and a first hub 8. The first side shield 4 is connected to the first hub 8 and the first jacket 6, wherein a one-piece design may also be provided; in particular, the first hub 8 and the first side shield 4 may be provided as a one-piece component. The second side shield 5 is connected to the second hub 9 and the second jacket 7, wherein a one-piece structure may also be provided in the case of the second half 3. The respective halves 2 and 3 are held in a rotationally fixed manner with their hubs 8 and 9 on a drum shaft 10 with a drum axis 11. The drum shaft 10 is rotatably held in a machine frame 18. A schematically illustrated drive 15 sets the drum shaft 10 into a rotation 17 about the drum axis 11. The adjacent edges of the first jacket 6 and of the second jacket 7 are spaced apart from one another in such a way that a yarn guide slot 12 forms between the edges. A yarn 13 is guided through the yarn guide slot 12 in such a way that a reciprocating movement 14 for the yarn 13 results during a rotation 17 of the drum body 1 about the drum axis 11. The yarn 13 impinging on the yarn guide slot 12 in the yarn conveying direction 33 is deflected by the rotation 17 of the drum body 1 and the course of the yarn guide slot 12 in the direction of the drum axis 11.
[0035] FIG. 2a shows a schematic view of a first embodiment of a slot drum according to the invention in the closed state. The closed state is to be understood as the position of the first half 2 and of the second half 3 of the drum body 1 that results in a yarn guide slot 12 between the halves 2 and 3 and enables a reciprocating movement 14 of the yarn 13 during a rotation of the drum body 1. The slot drum 1 shown comprises a first half 2 and a second half 3, each of the halves 2 and 3 respectively having a side shield 4 and 5, respectively, a hub 8 and 9, respectively, and a jacket 6 and 7, respectively. The yarn guide slot 12 through which the yarn 13 is guided is formed by the adjacent edges of the first jacket 2 and of the second jacket 3. The drum body 1 is held in a rotationally fixed manner on the drum shaft 10, and the drum shaft 10 is mounted rotatably in the machine frame 18. By means of a drive 15, the drum shaft 10 is set into rotation about the drum axis 11 and the reciprocating movement 14 for the yarn 13 is thus triggered. The hub 8 of the first half 2 of the drum body 1 is connected to an actuator 19. By means of the actuator 19, the first half 2 of the drum body 1 is set into a linear movement 20 in the direction of the drum axis 11. This results in a change in the distance between the first half 2 and the second half 3 of the drum body 1.
[0036] Accordingly, FIG. 2b subsequently shows the slot drum according to FIG. 2a in the open state. The slot drum 1 shown comprises a first half 2 and a second half 3, each of the halves 2 and 3 respectively having a side shield 4 and 5, respectively, a hub 8 and 9, respectively, and a jacket 6 and 7, respectively. By means of the actuator 19, the first half 2 of the drum body 1 has been moved so far away from the second half 3 of the drum body 1 in the direction of the drum axis 11 that a distance 21 is established. As a result of the distance 21 between the first jacket 6 and the second jacket 7, the edges, forming the yarn guide slot 12 (see FIG. 2a) in the closed state, of the jackets 6 and 7 can be cleaned. Simple threading of the yarn 13 between the two drum halves 2 and 3 is also possible. The distance 21 is determined by the linear movement 20 of the actuator 19. Accordingly, the drum body 1 can be opened at a predetermined distance 21 and can also be closed up to a specific yarn guide slot 12 (see FIG. 2a) adapted to the respective yarn.
[0037] FIG. 3 shows a schematic representation of a longitudinal section of a second embodiment of a slot drum according to the invention in the open state. The drum shaft 10 is held rotatably about the drum axis 11 in the machine frame 18. A drive wheel 16 is provided on the drum shaft 10. By means of a drive (not shown), the drum shaft 10 can be set into rotation via the drive wheel 16. The drive wheel 16 can be designed as a chain wheel, belt pulley or toothed wheel depending on the design of the drive. The second half 3 consists of a second side shield 5, a second jacket 7, and a second hub 9 and is connected to the drum shaft in a rotationally fixed and stationary manner by the second hub 9. The first half 2 has a first side shield 4, a first jacket 6 and a first hub 8. In contrast to the second half 3, the first hub 8 is held by the drum shaft 10 but is not connected thereto in a stationary manner or in a rotationally fixed manner.
[0038] A pin 27 which is arranged transversely to the drum axis 11 and penetrates through the drum shaft 10 is provided in the drum shaft 10, said pin serving as a coupling half for a rotationally fixed connection between the first half 2 and the drum shaft 10. A depression 26 is formed as a counterpart on the first hub 8. If the first half 2 is displaced by the actuator 19 in the direction of the drum axis 11 toward the second half 3 on the drum shaft 10, the pin 27 engages in the depression 26 and a rotationally fixed connection is established between the drum shaft 10 and the first hub 8 and thus the first half 2. The interaction of pin 27 and depression 26 creates a coupling connection between the drum shaft 10 and the first half 2 of the drum body 1. A driver 25 is held in a rotatable and stationary manner on the first hub 8. The driver 25 is partially enclosed by a fork 32. The fork 32 is fastened to the actuator 19 or is moved by the actuator 19 in the direction of the drum axis 11. As a result of this movement of the fork 32, the first hub 8 on the drum shaft 10 is pushed back and forth in the direction of the drum axis 11 with the linear movement 20, resulting in a distance 21 between the first half 2 and the second half 3.
[0039] In addition, a guide groove 23 is provided in the drum shaft 10, wherein the guide groove 23 is created with a slope in the direction of the drum axis 11. A guide pin 24 directed toward the drum shaft 10 is attached to the first hub 8. The guide pin 24 engages in the guide groove 23. This has the effect that, as a result of the guide pin 24, when a linear movement 20 is carried out, the hub 8 follows the course of the guide groove 23 and, in addition to the linear movement 20, experiences a rotation 22 about the drum axis 11 in the direction of the drum axis 11. Due to the course of the yarn guide slot, or of the separating line between the first half 2 and the second half 3, the additional rotation 22 of the two halves 2 and 3 relative to one another during a linear movement 20 by the distance 21 results in a significantly larger opening than in the case of a linear movement 20 without rotation 22.
[0040] FIG. 4 shows a schematic representation of an embodiment of an actuator for opening the slot drum as it is used, for example, in an embodiment according to FIG. 3. FIG. 4 shows the first half 2 with the first jacket 6, the first side shield 4 and the first hub 8. The first half 2 is held on the drum shaft 10 by the first hub 8. The drum shaft 10 is held rotatably about its drum axis 11 in the machine frame 18. A driver 25 is rotatably mounted on the first hub 8. A fork 32, which in turn is fastened to an electric drive 31, partially engages via the driver 25. The actuator 19 illustrated in the embodiment shown consists of the fork 32, the electric drive 31 and a toothed wheel 28. The toothed wheel 28 is fastened to the electric drive 31 and is driven by the latter. Furthermore, a toothed rack 29 is provided, which is fastened to the machine frame 18 in a stationary manner. When the electric drive 31 is started up, the toothed wheel 28 rotates, for example, in a direction of rotation, indicated by the arrow, about an actuator axis 30. As a result of the toothed wheel 28 engaging in the toothed rack 29, the actuator 19, in the embodiment shown, the electric drive 31, the fork 32 and the toothed wheel 29 are moved away from the machine frame 18 by a linear movement 20 in the direction of the drum axis 11. The actuator axis 30 is displaced on the drum shaft 10 in the direction of the drum axis 11. As a result of the fork 32, during this displacement, the driver 25 and thus also the first half 2 are moved by the actuator 19 in the direction of the drum axis 11.
[0041] A guide groove 23 in which a guide pin 24 engages is additionally provided in a surface of the drum shaft 10. The guide pin 24 is connected to the first hub 8. In the case of a linear movement 20 by the first hub 8, the first hub 8 is moved in a rotation 22 about the drum axis 11 as a result of the guide pin 24 extending in the guide groove 23. Since the driver 25 is rotatably mounted on the first hub 8, the rotation 22 of the first hub 8 has no influence on the movement of the actuator 19, which carries out a mere linear movement 20.
[0042] FIG. 5 shows a schematic representation of a side view of a slot drum, wherein the yarn 13 with its yarn conveying direction 33 is shown for a better understanding of the side view. The first half 2 of the drum body is shown, said half being formed from the first side shield 4 and the first jacket 6 and the first hub 8. The first half 2 is held on the drum shaft 10. The drum shaft 10 is mounted rotatably in the drum axis 11 in the machine frame 18. The drum shaft 10 is set into a rotation 17 by a drive (not shown) and subsequently rotates at a high rotational speed. In order to exclude a hazard to the operating personnel, a protective cover 34 is arranged in front of the operating side 36. The protective cover 34 is held on the machine frame 18 via a hinge 35. By simply monitoring the position of the protective cover 34, a controller (not shown) could trigger or correspondingly lock various functions. For example, operation of the slot drum with an open protective cover 34 can be locked, or a linear movement of the first half 2, as shown in FIGS. 2a, 2b, can be triggered.
[0043] The present invention is not limited to the shown and described exemplary embodiments. Modifications within the scope of the claims are possible, as well as a combination of the features, even if these are shown and described in different embodiments.
TABLE-US-00001 List of reference signs 1 Drum body 19 Actuator 2 First half 20 Linear movement 3 Second half 21 Distance 4 First side shield 22 Rotation 5 Second side shield 23 Guide groove 6 First jacket 24 Guide pin 7 Second jacket 25 Driver 8 First hub 26 Depression 9 Second hub 27 Pin 10 Drum shaft 28 Toothed wheel 11 Drum axis 29 Toothed rack 12 Yarn guide slot 30 Actuator axis 13 Yarn 31 Electric drive 14 Reciprocating movement 32 Fork 15 Drive of drum shaft 33 Yarn conveying direction 16 Drive wheel 34 Protective cover 17 Rotation of drum shaft 35 Hinge 18 Machine frame 36 Operating side
