Winding drum for a winding machine and winding machine

Abstract

The present invention relates to a slotted drum for a dishwasher for traversing a yarn (13), comprising a drum body (1) consisting of a first half (2) and a second half (3), and a drum shaft (10) with a drum axle (11), wherein the drum body (1) is held rotationally fixed on the drum shaft (10) and has a yarn guide slot (12) circumferential around the drum body (1), which is formed by the adjacent halves (2, 3) of the drum body (1). Each half (2, 3) is formed from a side plate (4, 5), a cylindrical shell (6, 7), and a hub (8, 9) for mounting on the drum shaft (10).At least the first half (2) of the drum body (1) is held displaceably on the drum shaft (10) in the direction of the drum axis (11) and an actuator (19) is provided for moving the at least first half (2) of the drum body (1) on the drum shaft (10) in the direction of the drum axis (11), wherein in addition to moving the at least first half (2) of the drum body (1) in the direction of the drum axis (11) a simultaneous rotation (22) of the at least first half (2) relative to the second half (3) about the drum axis (11) is provided.

Description

[0001] The present invention relates to a slotted drum for a winding machine for traversing a yarn, comprising a drum body consisting of a first half and a second half, and a drum shaft with a drum axle. The drum body is held rotationally fixed on the drum shaft and has a yarn guide slot circumferential around the drum body, which is formed by the adjacent halves of the drum body. Each half of the drum body is formed from a side plate, a cylindrical shell, and a hub for mounting on the drum shaft.

[0002] Slit drums of this type are used in winding machines to traverse yarn during the production of sewing thread spools. During winding, the yarn is moved back and forth along the longitudinal axis of a sewing thread spool sleeve by a traversing mechanism, creating various windings in different structures and shapes. The sewing thread spool sleeve is driven either directly by a motor, which rotates at least one spool holder or a spool mandrel, or indirectly by a friction roller arranged parallel to the sewing thread spool sleeve. The friction roller also serves as a support roller. The friction roller can also be designed as the slit drum itself. Due to the nature and properties of the sewing thread, no additional yarn guide is necessary; the yarn is guided directly through the yarn guide slot in the slit drum and by the rotation of the slit drum, causing the yarn to move back and forth.The yarn is clamped between the slotted drum and the sewing thread spool sleeve, or the yarn already on the sewing thread spool sleeve, and is thus laid down on the sewing thread spool sleeve.

[0003] When starting a new winding process, the yarn must be manually inserted into the yarn guide slot of the slot drum, requiring considerable operator dexterity. If the yarn color is changed from one winding process to the next, cleaning the yarn guide slot or even the drum body may be necessary to prevent color transfer to the newly wound yarn or dirt from entering the sewing thread spool. Depending on the yarn's properties, fine abrasion during traversing can discolor the yarn guide slot or cause the abrasion to accumulate inside the drum body.

[0004] Spooling machines of this type with slotted drums are known from the prior art; for example, CN 209 635 606 U discloses a slotted drum which is formed from four shells forming the guide slot and which are held on two side plates. The side plates in turn are fixed to a shaft to prevent rotation.

[0005] The design allows for cleaning or replacement of the components forming the yarn guide slot by disassembling them. EP 2 170 750 A1 further discloses a slot drum with a one-sided bearing for the drum shaft, so that the slot drum can be removed from the drum shaft to one side. CN 209 427 865 U discloses a slot drum with a lightweight design to reduce its own weight and achieve energy-efficient operation at high speeds compared to steel constructions. A disadvantage of known slot drum designs is that cleaning is complex and requires disassembly of the slot drum or at least parts of it. Furthermore, the narrow width of the yarn guide slot necessitates complicated yarn movements during the threading process.

[0006] Other winding machines with slotted drums are known from publications JP2003112852A, GB814293A, US3532279A, KR 101 194 983 B1 and CH507147A. The object of the present invention is therefore to propose a device for traversing a yarn which enables easy cleaning and threading, without compromising high quality and uniformity of the spools.

[0007] The problem is solved by a slotted drum for a winding machine for traversing a yarn, comprising a drum body consisting of a first half and a second half, and a drum shaft with a drum axis. The drum body is fixedly mounted on the drum shaft and has a yarn guide slot running around its circumference, formed by the adjacent halves of the drum body. Each of the two halves consists of a side plate, a cylindrical shell, and a hub for mounting on the drum shaft. At least the first half of the drum body is slidably mounted on the drum shaft in the direction of the drum axis, and an actuator is provided for moving at least the first half of the drum body on the drum shaft in the direction of the drum axis.In addition to the movement of at least the first half of the drum body in the direction of the drum axis, a simultaneous rotation of at least the first half relative to the second half about the drum axis is provided. Since the yarn guide slot is guided obliquely to the drum axis over the drum body's shell, the additional rotation of the first halves of the drum body about the drum axis, even with a small linear displacement, results in a larger opening in the width of the yarn guide slot. This allows the linear movement in the direction of the drum axis, as well as the actuator, to be designed for a smaller displacement. Consequently, sufficiently large openings in the width of the yarn guide slot can be achieved even with relatively narrow winding sections, and the characteristic opening of the yarn guide slots in the present invention does not lead to an excessive widening of the winding sections.This also minimizes movements along the winding axis, thereby reducing potential interference with adjacent winding points (which may be in winding operation) due to vibrations. Rotation can be generated by a suitable arrangement of the actuator for linear motion or by a suitable design of the first hub of the drum body. For example, the actuator for moving the first half can engage the first hub via a pin in such a way that a guide groove in the first hub causes the pin, and thus the first half of the drum body, to simultaneously perform an axial and a rotational movement, with the actuator moving only in a linear direction. In an alternative embodiment, rotation is provided by a drive independent of the actuator.In this way, the linear movement and rotation can be set and performed independently of each other, allowing for the most advantageous movement for the necessary tasks. Each of the two halves of the drum body is constructed, for example, from a side plate and a cylindrically shaped shell detachably attached to the side plate. The respective side plate is held rotationally fixed on the drum shaft by a hub formed on the side plate. In an alternative design, the cylindrical shell, the side plate, and the hub are manufactured as a single piece. The edge of the cylindrical shell facing away from the side plate is shaped to correspond to the yarn guide slot.When the two halves are mounted on the drum shaft, the edges of the casings facing away from the respective side plate are positioned opposite each other and spaced apart in such a way that the yarn guide slot is formed between the cylindrical casings. Yarn guide slots typically have a width of 0.2 mm to 2.0 mm, depending on the yarn being processed. The two halves of the drum body are therefore mounted on the drum shaft at a distance corresponding to the width of the yarn guide slot and are connected to it in a rotationally fixed manner. The mounting on the drum shaft, the side plate, and the casing can be manufactured and screwed together as separate parts or, alternatively, designed as a single piece. Advantageously, the casing is detachably connected to the side plate, allowing for easy replacement of the casing, for example, if a change in the slot shape is necessary.The drum casing is also subject to wear from the yarn sliding across its surface and must be replaced after a certain operating period. A drive mechanism sets the drum shaft, and thus the drum body, into rotation. Due to the arrangement of the yarn guide slot, this rotation of the drum shaft, and therefore of the drum body, results in a shifting motion of the yarn guided within the slot.

[0008] According to the invention, at least the first half of the drum body is mounted on the drum shaft in such a way that it can be displaced in the direction of the drum axis. For movement in the direction of the drum axis, the first half of the drum body is connected to an actuator. The actuator can be connected to the first side plate or to the first hub arranged between the first side plate and the drum shaft for mounting the first side plate on the drum shaft.

[0009] Before threading yarn into the yarn guide slot or when the drum body needs cleaning, the actuator can shift the first half of the drum body along the drum axis, causing the two halves to move apart and widening the yarn guide slot. In a further development, this widening of the yarn guide slot can occur in two stages. In the first stage, the width of the yarn guide slot is widened to simplify threading, allowing it to be performed manually or by a robot. In the second stage, the two halves are moved further apart to provide good accessibility for maintenance and cleaning of the drum body.

[0010] In an alternative embodiment, the drum shaft has a guide groove, and a guide pin is provided on the first hub, engaging in the guide groove. This design allows a single actuator to provide both linear movement along the drum axis and rotation of the first half of the drum body. The guide groove can be located directly in the drum shaft or in a hollow shaft mounted on the drum shaft. When the actuator connected to the first hub is actuated, the first hub is moved along the drum axis and rotated by the action of the guide pin in the guide groove, depending on the rotation of the guide groove around the drum axis. To allow adjustment of the yarn guide slot width, the guide groove can have a corresponding first section extending towards the drum axis.

[0011] Preferably, the first hub is connected to the actuator. By connecting the actuator to the first hub, the movement of the first half of the drum body is converted by the actuator into a relative movement between the first hub and the drum shaft, or, if a hollow shaft is present, between the first hub and the hollow shaft.

[0012] A pneumatic cylinder or an electric drive is used as the actuator. Due to the short travel distances, the electric drive can be implemented as a simple electromagnetic linear actuator. Alternatively, however, it is also possible to use an inexpensive stepper motor in combination with a rack and pinion to convert the motor's rotary motion into a linear motion.

[0013] Advantageously, the actuator is connected to the first hub via a drive wheel, which is rotatably mounted on the first hub. This makes it possible to maintain the connection between the first hub / drive wheel and the actuator even during spooling operation. For example, a ring held by a bearing on the first hub can be provided, which is partially enclosed by a fork-shaped connecting part of the actuator. With such a design, a simple rotary movement of the first hub, and thus of the first half of the drum body, is possible during a linear movement of the drive wheel. Further design possibilities arise from shaping the drive wheel as a fork or eyelet.

[0014] Preferably, a coupling connection is provided between the drum shaft and at least the first half of the drum body. This allows the first half of the drum body to move independently of the drum shaft after the coupling is opened. This is particularly advantageous when the first half is subject to a rotary movement, as this can be performed with the drum shaft stationary.

[0015] It is advantageous if the coupling connection is located between the first hub of the first half of the drum body and the drum shaft. The first half of the drum body is mounted in a fixed position on the first hub, through which the drum shaft is guided. This allows the first half of the drum body to move along the drum shaft together with the first hub. If a coupling is provided between the first hub and the drum shaft, rotation of the first hub around the drum axis is only possible after disengaging the connection, independent of the drum shaft. Such a coupling can be of a disengageable design, in which the first hub can be mechanically decoupled from the drum shaft. Alternatively, a non-disengageable coupling is also possible, in which, for example, a raised section, such as a pin, is attached to the drum shaft that engages in a corresponding recess in the first hub.Such a design ensures that a linear movement of the first hub towards the drum axis automatically disengages the clutch, eliminating the need for separate clutch disengagement. For winding operation, only the axial position of the first hub needs to be locked in this case.

[0016] Preferably, rotation of the drum shaft or drum body about the drum axis is locked when the two halves of the drum body are moving apart. Such locking can be achieved mechanically or electronically. In the case of mechanical locking, it can be coupled to the same actuator that performs the movement of one half of the drum body.

[0017] Preferably, the movement of at least the first half of the drum body creates a gap of at least 10 mm between the two halves. An opening of 10 mm is sufficient to facilitate threading. A movement of at least 20 mm is particularly preferred. With a gap of 20 mm or more, threading the yarn with just one hand is easily possible. Simple manual cleaning can also be carried out with this opening. Furthermore, it is advantageous if the rotation of at least the first half around the drum axis is provided within a range of 5 to 40 degrees when the drum body opens. With an opening in the direction of the drum axis and an additional rotation of the two drum halves relative to each other, optimal access can be achieved with a short axial movement.The small axial displacement of one half allows for a compact design of the movement mechanism. A distance of 50 mm and a rotation of 30 degrees have proven particularly advantageous. This enables a sufficiently large opening of the two halves to allow for easy manual cleaning of the slit drum. It also ensures a sufficiently large opening regardless of the shape of the slit drum or the yarn guide slot. Therefore, the opening mechanism does not need to be replaced or modified when the two halves are exchanged due to a change in the winding characteristics caused by a different yarn guide slot configuration.

[0018] Furthermore, a winding machine with at least one slotted drum is proposed according to the previous description, wherein the winding machine has a protective cover for the slotted drum and, upon opening the protective cover, the halves of the slotted drum are automatically moved apart. The advantageous automatic mechanism can be of a mechanical or electrical design. For example, the position of the protective cover can be reported to the control system by a corresponding sensor. As soon as this sensor detects that the protective cover has been opened, the halves of the drum body are moved apart. As soon as the protective cover leaves the open position, the halves of the drum body are moved back together. Alternatively, a mechanical automatic mechanism would mean that the halves of the drum body are moved apart by a corresponding device when the door is opened.In this case, according to the invention, the protective cover constitutes the actuator that moves the first half of the drum body. For example, the protective cover can be connected to the hub via a lever. The opening of the protective cover itself can also be provided mechanically by an operator or automatically via a suitable pneumatic, electric, or electropneumatic drive.

[0019] Further advantages of the invention are described in the following exemplary embodiment.

[0020] They show: Figure 1 a schematic view of a slotted drum according to the state of the art; Figure 2a a schematic view of a first embodiment of a slotted drum in the closed state Figure 2b a schematic view of a first embodiment of a slotted drum in the open state; Figure 3a schematic representation of a longitudinal section of a second embodiment of a slotted drum according to the invention in the open state; Figure 4 a schematic representation of an embodiment of an actuator for opening the slot drum and Figure 5 a schematic representation of a side view of a slotted drum according to the invention.

[0021] Figure 1Figure 1 shows a schematic top view of an embodiment of a slotted drum according to the prior art. The slotted 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 plate 4, a first shell 6, and a first hub 8. The first side plate 4 is connected to the first hub 8 and the first shell 6, whereby a one-piece construction is also possible; in particular, the first hub 8 and the first side plate 4 can be provided as a single component. The second side plate 5 is connected to the second hub 9 and the second shell 7, whereby a one-piece construction is also possible in the case of the second half 3. The respective halves 2 and 3 are held non-rotatably by their hubs 8 and 9 on a drum shaft 10 with a drum axle 11. The drum shaft 10 is rotatably mounted in a machine frame 18.The drum shaft 10 is set into rotation 17 about the drum axis 11 by a drive 15 (shown schematically). The adjacent edges of the first cover 6 and the second cover 7 are spaced apart such that a yarn guide slot 12 is formed between the edges. A yarn 13 is guided through the yarn guide slot 12 such that a shifting motion 14 occurs for the yarn 13 when the drum body 1 rotates 17 about the drum axis 11. The yarn 13, which encounters the yarn guide slot 12 in the yarn conveying direction 33, is deflected in the direction of the drum axis 11 by the rotation 17 of the drum body 1 and the path of the yarn guide slot 12.

[0022] Figure 2aFigure 1 shows a schematic view of a first embodiment of a slotted drum in the closed state. The closed state refers to the position of the first half 2 and the second half 3 of the drum body 1 that forms a yarn guide slot 12 between halves 2 and 3 and allows the yarn 13 to move 14 during rotation of the drum body 1. The slotted drum 1 shown consists of a first half 2 and a second half 3, each half 2 and 3 having a side plate 4 and 5 respectively, a hub 8 and 9 respectively, and a cover 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 cover 2 and the second cover 3. The drum body 1 is fixedly mounted on the drum shaft 10, and the drum shaft 10 is rotatably mounted in the machine frame 18.A drive 15 rotates the drum shaft 10 about the drum axis 11, thereby initiating the changing motion 14 for the yarn 13. The hub 8 of the first half 2 of the drum body 1 is connected to an actuator 19. The actuator 19 moves the first half 2 of the drum body 1 into a linear motion 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.

[0023] The following shows Figure 2b the slot drum after the Figure 2acorrespondingly in the open state. The slotted drum 1 shown consists of a first half 2 and a second half 3, each half 2 and 3 having a side plate 4 and 5 respectively, a hub 8 and 9 respectively, and a cover 6 and 7 respectively. By means of the actuator 19, the first half 2 of the drum body 1 was moved away from the second half 3 of the drum body 1 in the direction of the drum axis 11, such that a gap 21 was created. The gap 21 between the first cover 6 and the second cover 7 allows the yarn guide slot 12 (see Figure 2aThe edges of the drum halves 6 and 7 forming the drum halves can be cleaned. It is also possible to easily thread the yarn 13 between the two drum halves 2 and 3. The distance 21 is determined by the linear movement 20 of the actuator 19. Accordingly, the drum body 1 can be opened to a predetermined distance 21 and also to a specific yarn guide slot 12 adapted to the respective yarn (see figure). Figure 2a ) will be closed.

[0024] Figure 3Figure 1 shows a schematic longitudinal section of a second embodiment of a slotted drum according to the invention in the open state. The drum shaft 10 is rotatably mounted about the drum axis 11 in the machine frame 18. A drive wheel 16 is provided on the drum shaft 10. The drum shaft 10 can be set into rotation via the drive wheel 16 by means of a drive (not shown). Depending on the drive design, the drive wheel 16 can be a chain, belt, or gear. The second half 3 consists of a second side plate 5, a second casing 7, and a second hub 9 and is connected to the drum shaft in a rotationally and spatially fixed manner by the second hub 9. The first half 2 has a first side plate 4, a first casing 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 spatially or rotationally fixed to it.

[0025] A bolt 27, arranged transversely to the drum axis 11 and passing through the drum shaft 10, is provided in the drum shaft 10. This bolt serves as one half of the coupling for a rotationally fixed connection between the first half 2 and the drum shaft 10. A recess 26 is formed on the first hub 8 as a counterpart. When the first half 2 is displaced by the actuator 19 towards the drum axis 11 against the second half 3 on the drum shaft 10, the bolt 27 engages in the recess 26, creating a rotationally fixed connection between the drum shaft 10 and the first hub 8, and thus between the first half 2 and the drum body 1. The interaction of the bolt 27 and the recess 26 creates a coupling connection between the drum shaft 10 and the first half 2 of the drum body 1. A driver 25 is rotatably and fixedly mounted on the first hub 8. The driver 25 is partially enclosed by a fork 32.The fork 32 is attached to the actuator 19 or is moved by the actuator 19 in the direction of the drum axis 11. This movement of the fork 32 pushes the first hub 8 back and forth on the drum shaft 10 in the direction of the drum axis 11 with the linear movement 20, resulting in a gap 21 between the first half 2 and the second half 3.

[0026] Additionally, a guide groove 23 is provided in the drum shaft 10, with the guide groove 23 having a slope in the direction of the drum axis 11. A guide pin 24, directed towards the drum shaft 10, is attached to the first hub 8. The guide pin 24 engages in the guide groove 23. This causes the hub 8, when a linear movement 20 is performed by the guide pin 24, to follow the path of the guide groove 23 and, in addition to the linear movement 20 in the direction of the drum axis 11, to undergo a rotation 22 about the drum axis 11. Due to the path of the yarn guide slot, or rather the dividing line between the first half 2 and the second half 3, a linear movement 20 through a distance 21 results in a significantly larger opening due to the additional rotation 22 of the two halves 2 and 3 relative to each other than a linear movement 20 without rotation 22.

[0027] Figure 4shows a schematic representation of an embodiment of an actuator for opening the slotted drum, as it is used, for example, in a design according to Figure 3 is applied. Figure 4Figure 1 shows the first half 2 with the first casing 6, the first side plate 4, and the first hub 8. The first hub 8 holds the first half 2 on the drum shaft 10. The drum shaft 10 is rotatably mounted in the machine frame 18 about its drum axis 11. A driver 25 is rotatably mounted on the first hub 8. A fork 32, which is attached to an electric drive 31, partially engages the driver 25. The actuator 19 shown in the illustrated embodiment consists of the fork 32, the electric drive 31, and a gear 28. The gear 28 is attached to the electric drive 31 and is driven by it. A rack 29 is also provided, which is fixedly attached to the machine frame 18. When the electric drive 31 is activated, the gear 28 rotates, for example, in the direction of rotation indicated by the arrow, about an actuator axis 30.By engaging the gear 28 with the rack 29, the actuator 19 (in the illustrated embodiment, the electric drive 31), the fork 32, and the gear 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 moves along the drum shaft 10 in the direction of the drum axis 11. During this movement, the fork 32 moves the driver 25, and thus also the first half 2, in the direction of the drum axis 11 via the actuator 19.

[0028] A guide groove 23 is provided in a surface of the drum shaft 10, into which a guide pin 24 engages. The guide pin 24 is connected to the first hub 8. During a linear movement 20 through the first hub 8, the first hub 8 is moved about the drum axis 11 with a rotation 22 by the guide pin 24 running along 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 performs a purely linear movement 20.

[0029] Figure 5Figure 1 shows a schematic side view of a slotted drum, with the yarn 13 and its yarn conveying direction 33 shown for better understanding of the side view. The first half 2 of the drum body is shown, which consists of the first side plate 4, the first cover 6, and the first hub 8. The first half 2 is held on the drum shaft 10. The drum shaft 10 is rotatably mounted in the machine frame 18 in the drum axis 11. The drum shaft 10 is set into rotation 17 by a drive (not shown) and subsequently rotates at high speed. To prevent injury to the operating personnel, a protective cover 34 is provided on the operating side 36. The protective cover 34 is held on the machine frame 18 by a hinge 35. Various functions can be triggered or locked accordingly by a control unit (not shown) simply monitoring the position of the protective cover 34.For example, operation of the slotted drum with the protective cover 34 open can be locked, or a linear movement of the first half 2, as in . Figures 2a, 2b shown, triggered.

[0030] The present invention is not limited to the embodiments shown and described. Modifications within the scope of the claims are possible. Reference symbol list 1 drum body 21 Distance 2 First half 22 Twist 3 Second half 23 Guide groove 4 First side panel 24 guide pen 5 Second side panel 25 drive 6 First case 26 in-depth 7 Second case 27 bolt 8 First hub 28 gear 9 Second hub 29 rack and pinion 10 drum shaft 30 Actuator axis 11 Drum axle 31 electric drive 12 Yarn guide slot 32 Fork 13 yarn 33 Yarn conveying direction 14 Changing movement 34 Protective cover 15 Drive drum shaft 35 hinge 16 drive wheel 36 User interface 17 Rotation drum shaft 18 machine frame 19 actuator 20 Linear motion

Claims

1. A slot drum for a winding machine for traversing a yarn (13), having a drum body (1) consisting of a first half (2) and a second half (3), and comprising a drum shaft (10) with a drum axis (11), wherein the drum body (1) is held in a rotationally fixed manner on the drum shaft (10) and has a yarn guide slot (12) which extends around the drum body (1) and is formed by the adjacent halves (2, 3) of the drum body (1), and wherein each half (2, 3) is formed from a side shield (4, 5) and a cylindrical jacket (6, 7) and a hub (8, 9) for mounting on the drum shaft (10), characterized in that at least the first half (2) of the drum body (1) is held on the drum shaft (10) displaceably in the direction of the drum axis (11), and an actuator (19) for moving the at least first half (2) of the drum body (1) on the drum shaft (10) in the direction of the drum axis (11) is provided, wherein, in addition to the movement of the at least first half (2) of the drum body (1) in the direction of the drum axis (11), a simultaneous rotation (22) of the at least first half (2) relative to the second half (3) about the drum axis (11) is provided and wherein the actuator (19) is a pneumatic cylinder or an electric drive.

2. The slot drum in accordance with claim 1, characterized in that the rotation (22) is provided by a rotary drive that is independent of the actuator (19).

3. The slot drum in accordance with at least one of the preceding claims, characterized in that the drum shaft (10) has a guide groove (23), and a guide pin (24), which engages in the guide groove (23), is provided on the first hub (8).

4. The slot drum in accordance with at least one of the preceding claims, characterized in that the first hub (8) is connected to the actuator (19).

5. The slot drum in accordance with at least one of the preceding claims, characterized in that the actuator (19) is connected to the first hub (8) via a driver (25), wherein the driver (25) is rotatably held on the first hub (8).

6. The slot drum in accordance with at least one of the preceding claims, characterized in that a coupling connection (26, 27) is provided between the drum shaft (10) and the at least first half (2) of the drum body (1).

7. The slot drum in accordance with claim 6, characterized in that the coupling connection (26) is arranged between the drum shaft (10) and the first hub (8) of the first half (2) of the drum body (1).

8. The slot drum in accordance with at least one of the preceding claims, characterized in that a rotation (17) of the drum shaft (10) or of the drum body (1) about the drum axis (11) is locked when the halves (2, 3) of the drum body (1) are moved apart.

9. The slot drum in accordance with at least one of the preceding claims, characterized in that the movement of the at least first half (2) of the drum body (1) provides for the formation of a distance (21) of at least 10 mm between the two halves (2, 3) of the drum body (1).

10. A winding machine having at least one slot drum in accordance with at least one of the preceding claims and comprising a protective cover (34) of the slot drum, characterized in that provision is made that the halves (2, 3) of the drum body (1) automatically move apart when the protective cover (34) is opened.

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