Can changer for a spinning preparatory machine, and method

Abstract

A can changer for a spinning preparatory machine for moving self-propelled spinning cans, having a base plate on which the spinning cans can move, a rotationally drivable can turntable arranged in a recess of the base plate, a can inlet, a can outlet, and a displacement device for displacing the spinning cans on the base plate from a first of at least two can positions towards a second of the at least two can positions specified by the can turntable and / or from the second can position towards the can outlet. A method for moving self-propelled spinning cans in a can changer for a spinning preparatory machine, wherein the spinning cans are moved from a can inlet via an accessible base plate to a rotationally driven can turntable arranged in a recess of the base plate and further to a can outlet, wherein the spinning cans are displaced on the base plate from a first of at least two can positions towards a second of the at least two can positions specified by the can turntable and / or from the second can position towards the can outlet by way of a displacement device.

Description

[0001] Title: Can changer for a spinning preparation machine and process

[0002] Description

[0003] The invention relates to a can changer for a spinning preparation machine for moving self-propelled spinning cans, comprising a base plate traversable by the spinning cans, a rotatably driven can turntable arranged in a recess of the base plate, a can inlet, a can outlet, and a shifting device for shifting the spinning cans on the base plate from a first of at least two can positions to a second of the at least two can positions defined by the can turntable and / or from the second can position to the can outlet.The invention further relates to a method for moving self-propelled spinning jugs in a jug changer for a spinning preparation machine, wherein the spinning jugs are moved from a jug inlet via a drivable base plate onto a rotary-driven jug turntable arranged in a recess of the base plate and further to a jug outlet, wherein the spinning jugs on the base plate are moved from a first of at least two jug positions to a second of the at least two jug positions defined by the jug turntable and / or from the second jug position to the jug outlet by means of a shifting device.

[0004] In conventional can changers, a fiber sliver supplied by the spinning preparation machine is taken from a so-called sliver tray. The fiber sliver is then guided into the waiting can via guides. Once the can is full, the fiber sliver is cut, the full can is removed, and an empty can is fed in. Can changers come in linear and rotary versions, each offering different advantages depending on the can shape and size, as well as the available space. Linear can changers, unlike rotary ones, are very compact and are used where the design of the spinning preparation machine allows for only limited installation space.

[0005] German patent application DE 102015 110 585 A1 discloses a device for the linear exchange of a can on a spinning preparation line, suitable for simultaneously holding an empty and a full can. The device features a driven sliding mechanism that moves the empty can on a base plate along a guide from a waiting position to a rotatable can platform. The invention provides that the sliding mechanism at least partially encompasses the empty can on three sides in the area of ​​the base plate. This ensures secure handling of the can, and the sliding mechanism, due to its symmetrical design, is simple to manufacture. No one-sided guide or high-rigidity construction is required for the sliding mechanism. Furthermore, no components pivot into the path of movement of the cans, thus minimizing the risk of accidents.Furthermore, by loading the jug changer with a jug at ground level, a minimal distance between the upper edge of the jug and the storage plate can be maintained.

[0006] Furthermore, self-propelled spinning cans are known. EP 4 276 228 A1 discloses a self-propelled vehicle for transporting a receiving container for a fiber ribbon between fiber ribbon-delivering and fiber ribbon-fed textile machines over a surface. The vehicle comprises a chassis with multiple wheels, a vehicle body supported by the chassis, a transport surface for the receiving container arranged on the vehicle body, fastening means for attaching the receiving container to the vehicle body, and an on-board electrical system arranged on the vehicle body, comprising an electrical energy storage device, an electric drive unit, and a control unit. The vehicle can be permanently connected to the receiving container. At least two of the wheels can be designed as rigid wheels, aligned longitudinally with the vehicle and having fixed axes of rotation relative to the vehicle body.The rigid wheels are therefore not steerable, but fixed in the longitudinal direction.

[0007] The rigidly aligned wheels of self-propelled spinning cans can cause them to deviate from their intended path and veer to the left or right when being moved within a can changer. External guide elements are not a viable option, as the self-propelled spinning cans would be pushed over the wheels, which would not be aligned with the intended path.

[0008] One object of the invention may be to improve a can changer of the type mentioned above in such a way that the movement of self-propelled spinning cans is made possible by simple and cost-effective means.

[0009] This problem is solved starting from a can changer of the type mentioned at the outset, according to the preamble of claim 1, with the characterizing features. This problem is further solved by a method according to claim 14. Further developments and embodiments are specified in the dependent claims.

[0010] The can changer for a spinning preparation machine for moving self-propelled spinning cans has a base plate that can be traversed by the spinning cans, a rotatably driven can turntable arranged in a recess of the base plate, a can inlet, a can outlet and a shifting device for shifting the spinning cans on the base plate from a first of at least two can positions to a second of the at least two can positions defined by the can turntable and / or from the second can position to the can outlet.The can changer has navigation elements for guiding the spinning cans along a predetermined path from the can entry via the at least two can positions to the can exit via the base plate, wherein the navigation elements along the predetermined path at the at least two can positions each have a stop function marker defining the respective can position to stop the self-propulsion of the spinning cans and, in the direction of the path behind the respective stop function marker, a wake-up function marker to continue the self-propulsion of the spinning cans.

[0011] One advantage of the can changer is that the self-propulsion of the spinning cans can be conveniently interrupted at the can positions using the stop function markers, with the further movement of the spinning cans from the can positions being carried out by the shifting device and the spinning cans being conveniently resumed in a simple way using the wake-up function markers.

[0012] The spinning preparation equipment can be, for example, a drawing machine, carding machine, or combing machine. A self-propelled spinning can is a self-propelled vehicle used to transport a receiving container for a fiber sliver between fiber-slivering and fiber-sliver-fed textile machines. In spinning mills, spinning cans, also called fiber sliver cans or simply cans, are used to transport the fiber slivers between the textile machines. The can entry and can exit points are the beginning and end of the path through the can changer. Before entering and after exiting the can, the spinning cans can move through the spinning mill to other stations, guided by a similar mechanism. The transfer device allows the spinning cans to be moved without them performing their self-propulsion.The spinning jugs are moved from the first jug position towards the second jug position, although the movement does not necessarily bridge the distance between the first and second jug positions. The first jug position can also be called the waiting position. In the waiting position, an empty spinning jug is ready to be moved to the second jug position. The second jug position can also be called the filling position, in which the spinning jug is filled with fiber ribbon. For this purpose, the spinning jug in the second jug position is located on the rotating jug turntable, which rotates the spinning jug during filling to lay the fiber ribbon in loops in the usual manner. In principle, further jug ​​positions are conceivable, for example, a third, additional waiting position, whereby only one spinning jug can be arranged in each jug position.Navigation elements can be defined as devices that guide the spinning cans along a predetermined path, for example, a guide track, particularly in the form of a magnetic tape, which the self-propelled spinning cans can follow. Furthermore, the navigation elements include markers at which the self-propelled spinning cans perform an action, such as stopping their movement, changing direction, or resuming their movement. Such markers are the stop function marker and the wake-up function marker. The markers, including the stop function marker and / or the wake-up function marker, can be configured to transmit unique address information representing their respective location to the self-propelled spinning cans, whereby a control system for the self-propelled spinning cans specifies an action to be performed at the respective location.The unique address information representing each location can, in a simple case, be a unique identifier, such as a number. The control system can be electronic information stored in the spinning can, for example, in an assignment table where each address information of the markers is assigned an action to be performed by the spinning can upon reaching the marker. Alternatively or additionally, the control system can be a central controller for a large number of spinning cans, which communicates with the spinning cans and instructs each spinning can to perform the corresponding action upon reaching the respective marker. The transmission of the unique address information to the self-propelled spinning cans can be contactless and wireless, for example, via a radio signal.Each marker, including the stop function marker and / or the wake-up function marker, can be implemented as an RFID tags.

[0013] The control system can cause the self-propelled spinning wheel to rotate at the stop function marker of the first wheel position, aligning it with the travel path. To execute this rotation, one drive wheel of the self-propelled spinning wheel can be driven forward and another drive wheel backward. This advantageously allows the self-propelled spinning wheel to rotate in the direction of the travel path at the first wheel position.

[0014] The control system can switch the wheels or drive wheels of the self-propelled spinning can to free rotation at the stop function markers, thus advantageously enabling the spinning cans to be moved.

[0015] According to one embodiment, the shifting device can have two shifting means for simultaneously shifting two spinning cans. The shifting device can have a linear adjuster on which the two shifting means are arranged to shift an empty spinning can from the waiting position to the filling position and simultaneously a filled spinning can from the filling position to the can outlet.

[0016] The sliding device can have a displacement path whose length is less than the distance between the first can position and the second can position defined by the can turntable, wherein the length of the displacement path is, in particular, less than one-quarter of the distance between the first can position and the second can position defined by the can turntable, and wherein the ratio of the length of the displacement path to the distance between the first can position and the second can position defined by the can turntable is, in particular, less than 0.5 or less than 0.25. The displacement path can be a maximum of 200 millimeters. The sliding device can advantageously be designed with a shorter displacement path or a shorter stroke, which simplifies the sliding device.

[0017] The second spinning position, determined by the rotating platform, can include parking stops for the wheels of self-propelled spinning cans, for example, in the form of recesses for the wheels. This advantageously increases the centering accuracy of the spinning can, especially in the filling position under the storage device. The first spinning position can optionally have such parking stops. One advantage of the sliding mechanism is that the self-propelled spinning can requires narrower wheels and less drive power to move out of the recesses. The sliding mechanism assists the spinning can in this process and allows for the use of less powerful drive motors.

[0018] The wake-up function markers can be positioned behind the respective stop function marker along the travel path, either by the distance traveled or by a distance less than the distance traveled. This allows the moving device to advantageously bridge the gap between the stop function marker and the wake-up function marker. The spinning can then resume its self-propelled operation along the travel path from the wake-up function marker. If the wake-up function marker is positioned behind the stop function marker by a distance less than the distance traveled, the spinning can detach itself from the moving device by its own propulsion before the latter's movement along the travel path is complete.

[0019] A deceleration marker or several deceleration markers can be arranged along the travel path, in particular in front of one of the stop function markers, wherein the control reduces the travel speed of the self-propelled spinning can at the deceleration marker, thereby advantageously avoiding, for example, tipping of the spinning can, since the stop is less abrupt if the speed is already reduced when reaching the stop marker that triggers the stop.

[0020] According to one embodiment, a plastic module can be arranged at least sectionally along the travel path, wherein the navigation elements and / or the stop function markers and / or the wake-up function markers and / or the delay markers are arranged in the plastic module. The base plate of the can changer can, for example, be made of steel. Since steel interferes with the reading of, for example, RFID tags and the magnetic stripe, the navigation elements can be implemented in a plastic module. The plastic module can have a width perpendicular to the travel path of at least 50 millimeters, in particular 100 millimeters.Another object consists of a method for moving self-propelled spinning jugs in a jug changer for a spinning preparation machine, wherein the spinning jugs are moved from a jug inlet via a traversable base plate onto a rotary-driven jug turntable arranged in a recess of the base plate and further to a jug outlet, wherein the spinning jugs on the base plate are moved from a first of at least two jug positions to a second of the at least two jug positions defined by the jug turntable and / or from the second jug position to the jug outlet by means of a shifting device.The spinning cans are guided by navigation elements along a predetermined path from the can entry point, past at least two can positions, to the can exit point via the base plate, wherein the spinning cans' self-propulsion along the predetermined path is stopped at each of the at least two can positions by a stop function marker, and wherein the spinning cans' self-propulsion is continued by a wake-up function marker located behind the respective stop function marker in the direction of the path.

[0021] According to one embodiment, it can be provided that the spinning jugs are moved by the moving device by a displacement path, the length of which is less than a distance between the first jug position and the second jug position specified by the jug turntable, wherein the length of the displacement path is in particular less than a quarter of the distance between the first jug position and the second jug position specified by the jug turntable, wherein a ratio of the length of the displacement path to the distance between the first jug position and the second jug position specified by the jug turntable is in particular less than 0.5 or less than 0.25.

[0022] Further advantages and features are described below with reference to the accompanying drawings and a preferred embodiment. The descriptions apply equally to the can changer and the method. The figures show

[0023] Figure 1 shows a can changer according to one embodiment in a perspective view;

[0024] Figure 2 shows a self-propelled can for use with the can changer according to Figure 1 in a side view;

[0025] Figure 3 shows the self-propelled can according to Figure 2 in a view of the underside;

[0026] Figure 4 shows a schematic representation of the can changer according to Figure 1. Figure 1 shows a perspective view of a can changer 1 for a spinning preparation machine for moving self-propelled spinning cans 9 (not shown) according to one embodiment. Further details of the can changer 1 are shown in Figure 4. By means of ramp devices 2, 3, self-propelled spinning cans 9 can overcome a height difference between a ground surface and a raised base plate 7 of the can changer 1. An exemplary embodiment of the self-propelled spinning can 9 is shown in Figures 2 and 3. The can changer 1 has the base plate 7, which the spinning cans 9 can traverse, and a rotatable can turntable 8 arranged in a recess of the base plate 7. A can inlet 4 can be located in the area of ​​the ramp device 2 and a can outlet 5 in the area of ​​the ramp device 3.The can changer 1 has navigation elements 16 in the form of a guide track 21 for guiding the spinning cans 9 along a predetermined path from the can inlet 4, via at least two can positions 10, 11, to the can outlet 5, across the base plate 7. A plastic module 20 can be arranged at least partially along the path, with the navigation elements 16 being located in the plastic module 20. The plastic module 20 can have a width perpendicular to the path of at least 50 millimeters, in particular 100 millimeters. Although the can changer 1 is designed in the above-ground version shown here, it can alternatively be designed in an below-ground version, in which the base plate 7 is flush with the surface and, accordingly, no ramp devices 2, 3 are necessary.The can changer 1 is located in the area of ​​a depositing device 14 of the spinning preparation machine. Below the depositing device 14, the second can position 11 is located on the rotatable can turntable 8. The self-propelled spinning can 9, located in the second can position 11, is rotated during a filling process in which fiber sliver produced by the spinning preparation machine is deposited into the spinning can 9 via the depositing device 14.

[0027] An exemplary embodiment of the self-propelled spinning can 9 is shown in Figures 2 and 3, which depict a side view and a bottom view, respectively, and are described together. The self-propelled spinning can 9 has a receiving container 26 for the fiber sliver and a chassis 25 for moving the self-propelled spinning can 9. In operation, the self-propelled spinning can 9 travels back and forth between textile machines (not shown) to transport fiber slivers from fiber-slivering textile machines to fiber-slivered textile machines. For this purpose, the self-propelled spinning can 9 can follow the navigation elements 16 arranged on the ground, for example, in the form of guide tracks 21, which define the travel paths.Figures 2 and 3 illustrate the orientation of the self-propelled spinning can 9 in space by showing a longitudinal direction X, a transverse direction Y, and a vertical direction Z. These directions are defined according to a Cartesian coordinate system associated with the self-propelled spinning can 9 and are indicated by corresponding arrows. The vertical direction Z is perpendicular to a plane spanned by the ground. Terms such as "below," "below," "above," or "below" represent spatial references to the self-propelled spinning can 9 positioned on the ground.

[0028] The self-propelled spinning wheel 9 has a chassis 25 with two electrically driven rigid wheels 22 and two support wheels 23 that are freely pivotable about the vehicle's vertical axis H. The chassis 25 is designed with four wheels and, due to the offset arrangement of the wheels 22, 23 in the transverse direction Q of the vehicle, has four tracks. Those skilled in the art will recognize that the self-propelled spinning wheel 9 can also have a differently designed chassis 25, for example, one with three tracks or a three-wheeled, six-wheeled, etc., configuration. The chassis 25 can have one electric motor per drive wheel 22, in particular a wheel hub motor. The electric motors designed as wheel hub motors can be integrated into the drive wheels 22. The electrically driven drive wheels 22 advantageously allow the self-propelled spinning wheel 9 to rotate about its vertical axis H.Furthermore, the self-propelled spinning can 9 has two receivers 24 and 27 configured to read information from the navigation elements 16. Receiver 24 can be configured as an RFID receiver to read information from a navigation element 16 designed as an RFID tag. The RFID receiver 24 is located under the chassis 25 to keep it close to the ground, particularly the navigation elements 16, during operation. Receiver 27 can be configured as a magnetic tape reader for contactless detection of the path of the guide track 21, which is a navigation element 16 designed as a magnetic tape. The magnetic tape reader 27 is located at the front end of the self-propelled spinning can 9 in a main direction of travel F (forward travel) or in the longitudinal direction X.

[0029] Figure 4 shows a schematic representation of the spinning can changer 1 according to Figure 1. The spinning cans 9 are not shown here. A shifting device 6 is provided for shifting the spinning cans 9 on the base plate 7 in order to move the spinning cans 9 from the first can position 10 to the second can position 11 defined by the can turntable 8, and from the second can position 11 to the can outlet 5. The shifting device 6 can have two shifting means 28 for simultaneously shifting two spinning cans 9. In addition to the guide track 21 along the predetermined travel path, the navigation elements 16 each have a stop function marker 12 defining the respective can position at least at the first can position 10 and at the second can position 11, in order to stop the spinning cans 9 from moving independently.In the direction of travel, a wake-up function marker 15 is arranged behind each stop function marker 12 for resuming the self-propelled movement of the spinning cans 9, with the wake-up function markers 15 also being considered part of the navigation elements 16. The stop function markers 12 and the wake-up function markers 15 can be configured to transmit unique address information representing their respective locations to the self-propelled spinning cans 9, with a control system for the self-propelled spinning cans 9 specifying an action to be performed at the respective location.

[0030] The shifting device 6 has a shift path 17, the length of which is less than the distance between the first can position 10 and the second can position 11 defined by the can turntable 8. In particular, the length of the shift path 17 is less than a quarter of the distance between the first can position 10 and the second can position 11 defined by the can turntable 8, or, for example, a maximum of 200 millimeters, which allows the shifting device 6 to be advantageously smaller, simpler, and more cost-effective than if the spinning cans 9 were shifted from the first can position 10 to the second can position 11.This is achieved by having the spinning cans 9 travel a portion of the path from the first can position 10 to the second can position 11, in particular a predominant portion of the path, independently, namely from the wake-up function marker 15 behind the first can position 10 to the second can position 11. The same applies to the displacement path 17 from the second can position 11 to the can outlet 5. The displacement device 6 can include the displacement means 28 arranged at the second can position 10 for displacing the spinning cans 9 from the second can position 11 to the can outlet 5. The displacement path 17 is identical to the first can position 10. A predominant part of the travel path from the second can position 10 to the can outlet 5 is covered by the spinning cans 9 moving independently, namely from the wake-up function marker 15.The wake-up function markers 15 are arranged in particular at intervals around the displacement path 17 behind the respective stop function marker 12 along the travel path.

[0031] The second can position 11, defined by the can turntable 8, can have parking stop elements 18 for the wheels 22, 23 of the self-propelled spinning cans 9, for example, in the form of recesses. This advantageously increases the centering accuracy of the spinning can 9 in the second can position 11. The first can position 10 can optionally have such parking stop elements 18. The advantage of the shifting device 6 is that the self-propelled spinning can 9 can have narrower drive wheels 22 and require less drive power to move out of the recesses. The shifting device 6 assists the spinning can 9 in this process and allows for less powerful drive motors for the spinning cans 9. The control system can cause the self-propelled spinning cans 9 to rotate 90° to the right at the stop function marker 12 of the first can position 10 to align themselves with the direction of travel.The drive wheels 22 of the self-propelled spinning can 9 can rotate in the opposite direction at the stop function marker 12, so that the RFID receiver 24 remains above the stop function marker 12. After rotation, the drive wheels 22 of the self-propelled spinning can 9 are switched to free rotation by the control unit at both stop function markers 12 to allow movement by the moving device 6. Deceleration markers 19 can be arranged along the travel path, in particular in front of one of the stop function markers 12, with the control unit reducing the travel speed of the self-propelled spinning can 9 at the deceleration marker 19. The travel speed of the self-propelled spinning can 9 can also be reduced by a deceleration marker 19 in front of a navigation element 16 that changes the direction of travel.At the stop function markers 12 and at the navigation element 16 in front of the can outlet 5, where the spinning can 9 rotates, the guide track 21 extends visibly straight ahead beyond the respective positions of the stop function markers 9 and the navigation element 16. This is advantageous because the magnetic tape reader 27 of the spinning can 9 is located at the front in the direction of travel F, and the RFID receiver 24 is located centrally on the spinning can 9, and thus behind the magnetic tape reader 27 (Figure 3). Due to the extended guide track 21, the spinning can 9 continues straight ahead until the RFID receiver 24 is positioned above the respective positions of the stop function markers 9 and the navigation element 16. If the magnetic tape reader 27 could not continue to follow the guide track 21, the spinning can 9 could lose its orientation.The navigation elements 16 including the guide track 21, the stop function marker 12, the wake-up function marker 15 and the delay marker 19 can be arranged in the plastic module 20 (Figure 1).

[0032] During operation, when the self-propelled spinning cans 9 are moved in the can changer 1 from the can inlet 4, across the drive-over base plate 7, onto the rotary can turntable 8 located in the base plate 7, and further to the can outlet 5, the spinning cans 9 are moved on the base plate 7 from the first can position 10 to the second can position 11 and from the second can position 11 to the can outlet 5 by a shifting device 6. The spinning cans 9 are guided by navigation elements 16 along the predetermined travel path from the can inlet 4, across the two can positions 10 and 11, to the can outlet 5 via the base plate 7. The self-propelled movement of the spinning cans 9 along the predetermined route is stopped at at least two can positions 10, 11 by the stop function markers 12 and continued by the wake-up function markers 15 arranged behind the respective stop function marker 12 in the direction of the route.The spinning jugs 9 are moved by the shifting device 6 by a displacement path 17, the length of which is less than a distance between the first jug position 10 and the second jug position 11 specified by the jug turntable 8. Reference numeral.

[0033] 1 can changer

[0034] 2 ramp device

[0035] 3 Ramp device

[0036] 4 Can entry

[0037] 5 Can outlet

[0038] 6. Shifting device

[0039] 7 Base plate

[0040] 8 jug turntables

[0041] 9 spinning cans

[0042] 10 First pitcher position

[0043] 11 Second pitcher position

[0044] 12 stop function markers

[0045] 14 Storage device

[0046] 15 Wake-up function markers

[0047] 16 navigation elements

[0048] 17 Displacement path

[0049] 18 parking stop elements

[0050] 19 delay markers

[0051] 20 plastic modules

[0052] 21 Guide lane

[0053] 22 drive wheels

[0054] 23 non-driven wheels

[0055] 24 receivers, RFID receivers

[0056] 25 Chassis

[0057] 26 collection containers

[0058] 27 receivers, magnetic tape reader

[0059] 28 Displacement devices

[0060] X, Y, Z spatial direction

[0061] H vertical axis

[0062] L Longitudinal axis

[0063] Q transverse axis

[0064] F Main direction of travel

Claims

Patent claims 1. Can changer (1) for a spinning preparation machine for moving self-propelled spinning cans (9), comprising a base plate (7) accessible to the spinning cans (9), a rotatable can turntable (8) arranged in a recess of the base plate (7), a can inlet (4), a can outlet (5), and a displacement device (6) for moving the spinning cans (9) on the base plate (7) from a first of at least two can positions (10) to a second of the at least two can positions (11) defined by the can turntable (8) and / or from the second can position (11) to the can outlet (5), characterized in that the can changer (1) has navigation elements (16) for guiding the spinning cans (9) along a predetermined travel path from the can inlet (4) via the at least two can positions (10, 11) to the can outlet (5) via the base plate (7),wherein the navigation elements (16) along the specified travel path at the at least two can positions (10, 11) each have a stop function marker (12) defining the respective can position for stopping the self-propulsion of the spinning cans (9) and, in the direction of the travel path behind the respective stop function marker (12), a wake-up function marker (15) for continuing the self-propulsion of the spinning cans (9).

2. Can changer according to claim 1, characterized in that the shifting device (6) has two shifting means (28) for simultaneously shifting two spinning cans (9).

3. Can changer according to one of claims 1 or 2, characterized in that the navigation elements (16) have a guide track (21) along the predetermined route.

4. Can changer according to one of claims 1 to 3, characterized in that the stop function marker (12) and / or the wake-up function marker (15) are configured to transmit a unique address information representing their respective placement location to the self-propelled spinning cans (9), wherein a control of the self-propelled spinning cans (9) specifies an action to be performed at the respective placement location.

5. Can changer according to one of claims 1 to 4, characterized in that the displacement device (6) has a displacement path (17) whose length is less than a distance between the first can position (10) and the second can position (11) specified by the can turntable (8), wherein the length of the displacement path (17) is in particular less than a quarter of the distance between the first can position (10) and the second can position (11) specified by the can turntable (8), wherein a ratio of the length of the displacement path (17) to the distance between the first can position (10) and the second can position (11) specified by the can turntable (8) is in particular less than 0.5 or less than 0.

25.

6. Can changer according to one of claims 1 to 5, characterized in that the displacement distance (17) is a maximum of 200 millimeters.

7. Can changer according to one of claims 1 to 6, characterized in that the second can position (11) and / or the first can position (10) specified by the can turntable (8) have parking stop elements (18) for wheels of the self-propelled spinning cans (9).

8. Can changer according to one of claims 4 to 7, characterized in that the control system causes the self-propelled spinning can (9) to perform a rotational movement at the stop function marker (12) of the first can position (10) in order to be aligned in the direction of the travel path.

9. Can changer according to one of claims 4 to 8, characterized in that the control system switches drive wheels (22) of the self-propelled spinning can (9) freely rotating at the stop function markers (12).

10. Can changer according to one of claims 1 to 9, characterized in that the wake-up function markers (15) are arranged spaced apart by the displacement path (17) behind the respective stop function marker (12) along the travel path.

11. Can changer according to one of claims 4 to 10, characterized in that a deceleration marker (19) is arranged along the travel path, in particular in front of one of the stop function markers (12), wherein the control system The speed of the self-propelled spinning can (9) is reduced at the deceleration marker (19).

12. Can changer according to one of claims 1 to 11, characterized in that a plastic module (20) is arranged at least sectionally along the travel path, wherein the navigation elements (16) and / or the stop function markers (12) and / or the wake-up function markers (15) and / or the delay markers (19) are arranged in the plastic module (20).

13. Can changer according to claim 12, characterized in that the plastic module (20) has a width perpendicular to the travel path of at least 50 millimeters, in particular of 100 millimeters.

14. Method for moving self-propelled spinning jugs (9) in a jug changer (1) for a spinning preparation machine, wherein the spinning jugs (9) are moved from a jug inlet (4) via a traversable base plate (7) onto a rotary-driven jug turntable (8) arranged in a recess of the base plate (7) and further to a jug outlet (5), wherein the spinning jugs (9) on the base plate (7) are moved from a first of at least two jug positions (10) to a second of the at least two jug positions (11) defined by the jug turntable (8) and / or from the second jug position (11) to the jug outlet (5) by means of a displacement device (6), characterized in that the spinning jugs (9) are moved by navigation elements (16) along a predetermined travel path from the jug inlet (4) via the at least two jug positions (10, 11) to the can outlet (5) via the base plate (7),wherein the self-propulsion of the spinning cans (9) along the predetermined path is stopped at at least two can positions (10, 11) by a stop function marker (12) and wherein the self-propulsion of the spinning cans (9) is continued by a wake-up function marker (15) arranged in the direction of the path behind the respective stop function marker (12).

5. Method according to claim 14, characterized in that the spinning jugs (9) are moved by the displacement device (6) by a displacement path (17) the length of which is less than a distance between the first jug position (10) and the second jug position (11) specified by the jug turntable (8), wherein the length of the displacement path (17) is in particular less than a quarter of the distance between the first jug position (10) and the second jug position (11) specified by the jug turntable (8), wherein a ratio of the length of the displacement path (17) to the distance between the first jug position (10) and the second jug position (11) specified by the jug turntable (8) is in particular less than 0.5 or less than 0.25.

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