Sleeve magazine for a cross-coil manufacturing textile machine

Description

[0001] The invention relates to a tube magazine for a textile machine producing cross-wound bobbins, which has a plurality of work stations on both longitudinal sides of the machine, wherein the tube magazine has a plurality of drivable storage rows arranged next to one another, which can be equipped with empty tubes and each have an endless pulling means which is guided over deflection rollers and has a plurality of tube receiving mandrels, on each of which an empty tube can be deposited in a tip-oriented manner, and wherein the tube magazine has a tube stripper with which empty tubes can be transferred to a downstream cross conveyor belt.

[0002] Tube magazines for textile machines producing cross-wound bobbins, in which fresh empty tubes for winding bobbins to be produced can be stored, are known in various designs and described in numerous patent applications.

[0003] DE 199 05 856 A1, for example, describes an open-end rotor spinning machine which has a large number of work stations between its end frames on both longitudinal sides of the machine and has a central tube magazine arranged at the end of the machine.

[0004] The workstations of this textile machine, each of which, as usual, has a spinning device and a downstream winding device, are connected to the tube magazine via a so-called empty tube transport device. The tube magazine has several adjacent storage rows equipped with mandrels. Empty tubes are stored on the mandrels of these storage rows, tip-oriented. The storage rows are coupled via a shaft and driven by a common electric motor. This means that some of the mandrels can be positioned at a specific height, and the empty tubes stored on the corresponding mandrels can then be transferred to a downstream troughed belt by means of a tube pusher. The troughed belt then transports the empty tubes successively either to a tube transfer station or to a tube turner.

[0005] The well-known tube pusher is designed so that all transport chains of the tube magazine are always operated simultaneously. This means that the tube pusher always transfers all empty tubes positioned at a specific height on the transport chains simultaneously to the downstream troughed conveyor, which, as indicated above, is connected to machine-length empty tube conveyors via the tube turner or the tube transfer station. The empty tube conveyors then transport the empty tubes as needed to a service unit located near the workstation that has requested a fresh empty tube. The service unit then transfers the requested empty tube to the corresponding workstation.

[0006] Although the known device and method enable a relatively reliable supply of tip-oriented empty tubes to the workstations located on both longitudinal sides of an open-end rotor spinning machine, the known empty tube transport device is very inflexible, partly due to the design of the tube magazine. This means that due to the shared drive of the storage rows of the tube magazine and the shared tube slide, it is not possible to process several different yarn batches simultaneously on the textile machine in question with the device described in DE 199 05 856 A1.

[0007] A textile machine producing cross-wound bobbins with a similarly designed tube magazine is also described in DE 32 41 032 C2. This known tube magazine also has several adjacent storage rows equipped with tube-receiving mandrels for empty tubes, and a tube pusher designed to operate all transport chains simultaneously when activated. This means that even with this known device, the tube pusher can only transfer all empty tubes of the transport chains positioned at a certain height together to a downstream troughed belt.

[0008] Furthermore, DE 195 12 891 A1 discloses a tube magazine for a cross-winding machine. This magazine also has several adjacent storage rows with tube-receiving mandrels. The storage rows can be driven either separately or by a shared motor. Furthermore, empty tubes of different yarn batches can be stored on the tube-receiving mandrels of adjacent storage rows. The tube magazine is also equipped with a so-called tube ejection device, which can be moved transversely to the storage rows.

[0009] When a specific empty tube is requested by one of the workstations of the automatic cross-winder, the tube ejection device runs to the storage row that contains the empty tubes in question and transfers the empty tube positioned there in a transfer position to a downstream intermediate conveyor, which transfers the empty tube to a machine-length empty tube transport device, which conveys the empty tubes to the requesting workstation.

[0010] A comparable known tube magazine also has several storage rows equipped with tube receiving mandrels, which are driven by several separate electric motors. The tube magazine, for example, has twelve storage rows arranged side by side, with storage rows 1-4, storage rows 5-7, storage rows 8-10, and storage rows 11 and 12 each equipped with their own drive. Furthermore, this known tube magazine has a so-called tube carriage that can be moved transversely along the storage rows and is equipped with a movable tube gripper.

[0011] With this known device, the tube carriage also moves, when needed, to the storage row loaded with empty tubes from the requested yarn batch. The tube carriage positions itself at the respective storage row, grasps the requested empty tube with its tube gripper, and transfers the empty tube, tip-oriented, to a machine-length empty tube transport device, which conveys the empty tubes to the requested work station.

[0012] Using such cross-wound bobbin-producing textile machines, which are equipped with tube magazines having storage rows that can be driven at least partially separately and have a tube carriage equipped with a tube gripper that can be moved transversely with respect to the storage rows, different yarn batches can be produced simultaneously without any problems. However, the known devices have the not insignificant disadvantage that the achievable cycle times are relatively long. This means that after a cross-wound bobbin has been completed, the work stations often have to wait a relatively long time for a fresh empty tube before they can be restarted. Since the work stations are switched off, i.e. not operating, during this waiting time, such waiting times have a very negative impact on the overall efficiency of the cross-wound bobbin-producing textile machines.

[0013] Based on the aforementioned prior art, the invention is based on the object of modifying a tube magazine for a textile machine producing cross-wound bobbins. The tube magazine has several drivable storage rows that can be loaded with empty tubes, which are transferred to a downstream transverse conveyor belt by means of a tube stripper. This modification improves the cycle times of the distribution system. This means that the time required to transfer an empty tube from the tube magazine to a workstation requesting a fresh empty tube is to be significantly shortened by the invention.

[0014] This object is achieved according to the invention in that the sleeve magazine is equipped with a plurality of sleeve strippers, each of which can be controlled separately as required.

[0015] The inventive design of a tube magazine with a plurality of individually controllable tube strippers has the particular advantage that a requested empty tube can be transferred by a tube stripper immediately without any time delay, i.e. without first having to wait for a special, movable tube transfer device, from the tube receiving mandrel of a storage chain to a downstream cross conveyor belt and from there to one of the machine-length empty tube conveyor belts.This means that on a cross-wound bobbin-producing textile machine whose tube magazine has the design according to the invention, not only can several different yarn batches be produced simultaneously, but textile machines equipped in this way are also characterized very positively by the fact that the cycle times achievable during cross-wound bobbin / empty tube changes are very short, which in turn has a very advantageous effect on the overall efficiency of the cross-wound bobbin-producing textile machine.

[0016] According to the invention, each of the storage rows of the tube magazine has its own, definedly controllable tube stripper. With such a tube magazine, in which each of the separately controllable storage rows is assigned its own, definedly controllable tube stripper, an optimal supply of the workstations of a textile machine producing cross-wound bobbins with empty tubes can be ensured in a relatively simple and reliable manner, whereby the requested empty tubes can also be assigned to different yarn batches. According to the invention, one of the deflection rollers, over which the endless traction means is guided, is equipped with an individual drive which is connected to the control system of the tube magazine via a control line. The individual drive can be used to move the endless traction means and thus to position the tube receiving mandrels with the empty tubes correctly.

[0017] Advantageous embodiments of the invention are the subject of the subclaims.

[0018] Advantageously, each of the tube wipers has a pneumatic drive equipped with a pneumatic cylinder. Such pneumatic cylinders are proven, cost-effective, mass-produced parts in textile machinery construction. They are also easy to control and characterized by high fatigue strength.

[0019] However, the sleeve strippers can also be equipped with an electric drive instead of a pneumatic drive.

[0020] Such electric drives, which, for example, have a stepper motor, can be controlled as needed at any time via the textile machine's central control unit, with relatively little control effort required. This means that a tube stripper operated by an electric drive can also be used to achieve proper empty tube transfer relatively easily.

[0021] An advantageous embodiment of the tube magazine according to the invention is provided, for example, in that each of the storage rows of the tube magazine can be equipped with empty tubes of a different yarn batch, wherein the different storage rows of the tube magazine can be equipped with empty tubes of different yarn batches.

[0022] Such a design makes it easy to produce different, even relatively small, yarn batches simultaneously and cost-effectively on a textile machine producing cross-wound bobbins. This means that if adjacent storage rows of a bobbin magazine can each be loaded with empty bobbins of a different yarn batch, demand-based control of the corresponding bobbin strippers can ensure that each workstation on the textile machine is always quickly and reliably supplied with an empty bobbin of the requested yarn batch when needed.

[0023] The invention further relates to a method for operating a tube magazine for a textile machine producing cross-wound bobbins, which has a plurality of workstations on both longitudinal sides of the machine. The tube magazine has several drivable, adjacent storage rows, each of which can be loaded with empty tubes and each has an endless traction device guided over deflection rollers and a plurality of tube-receiving mandrels, on each of which an empty tube can be deposited, tip-oriented. The empty tubes can be transferred to a downstream transverse conveyor belt by means of a tube stripper. The method according to the invention is particularly advantageous because, when an empty tube is requested by a workstation, the separately arranged, definedly controllable tube stripper of the storage row loaded with empty tubes of the requested yarn batch is immediately activated.This means that the activated tube stripper immediately transfers the requested empty tube without any delay, i.e., without having to wait for any movable transfer device, from the tube receiving mandrel of a storage chain to a downstream cross conveyor belt, which in turn immediately transfers the empty tube to the associated, machine-length empty tube conveyor belt. According to the invention, one of the deflection rollers, over which the endless traction device is guided, is equipped with an individual drive that is connected to the control system of the tube magazine via a control line. The individual drive moves the endless traction device, thus positioning the tube receiving mandrels with the empty tubes correctly.

[0024] Consequently, the method according to the invention allows several different yarn batches to be manufactured simultaneously in a very reliable manner, whereby the achievable cycle times are very short and the textile machine accordingly has a very favorable overall efficiency.

[0025] Further details of the invention can be found in the exemplary embodiments explained below with reference to the drawings.

[0026] It shows: Fig. 1 in perspective view an open-end rotor spinning machine with a tube magazine arranged at the end of the machine, which has several storage rows for empty tubes, which can be driven by an individual motor and to which a separate, defined controllable tube stripper is assigned, Fig. 2 schematically in plan view an open-end rotor spinning machine with a tube magazine arranged at the end of the machine, which also has separately drivable tube strippers, which are assigned to the individual, separately drivable storage rows of the tube magazine, whereby for reasons of better clarity a more detailed representation of these in the Fig. 3 The sleeve gripper shown in more detail has been omitted, Fig. 3 shows a schematic side view and a section through a sleeve magazine whose storage rows can be driven separately and which are each equipped with a separately controllable sleeve stripper.

[0027] The Fig. 1shows a perspective view of a textile machine producing cross-wound bobbins with a machine end frame 10 in which the central control unit 11 of the textile machine is installed and a tube magazine 2 arranged in the opposite machine end area. The textile machine producing cross-wound bobbins is designed as an open-end rotor spinning machine 1 and, as is known, has a plurality of work stations 4 which are arranged on both longitudinal sides of the open-end rotor spinning machine 1.

[0028] The workstations 4 are, as usual, each equipped with an open-end spinning device 3 and a downstream winding device (not shown in detail). During the spinning / winding operation, the workstations 4 process fiber material stored in spinning cans 8, each positioned below the open-end spinning devices 3, into cross-wound bobbins 7. As can be seen, the open-end rotor spinning machine 1 is further equipped with service units 5, which are mounted for movement, for example, on a rail structure.

[0029] The service units 5, which are connected to the central control unit 11 of the open-end rotor spinning machine 1 via a bus system 13, are designed, for example, as so-called change and cleaning carriages and intervene when a service call is pending at one of the workstations 4. Such a service call occurs, for example, when a cross-wound bobbin 7 has reached its specified diameter at one of the workstations 4 and must be replaced with a fresh empty tube 6.

[0030] Such open-end rotor spinning machines 1 generally also have a cross-wound bobbin transport device 14, i.e., such textile machines have at least one machine-length conveyor belt between their workstations 4 for transporting finished cross-wound bobbins 7. Furthermore, such open-end rotor spinning machines 1 are usually equipped with a so-called empty bobbin supply device, which in the exemplary embodiment consists of a bobbin magazine 2 designed according to the invention, arranged at the end of the machine, and an empty bobbin supply device designed according to the invention. As is known per se, the bobbin magazine 2 has several individually motor-driven storage rows 12 with bobbin receiving mandrels 19 for empty bobbins 6.

[0031] According to the invention, each of the storage rows 12 of the tube magazine 2 is assigned its own, separately controllable tube stripper 9. The tube strippers 9 are connected to the central control unit 11 of the open-end rotor spinning machine 1, for example, via a tube magazine control 15 and a bus system 13.

[0032] The empty tube supply device further comprises, as is known, two machine-length empty tube conveyor belts 16 and, in the area of ​​the tube magazine 2, a Fig. 1 cross conveyor belt 17 (not shown).

[0033] If necessary, i.e., when a cross-wound bobbin / empty tube change is due at one of the workstations 4, the tube stripper 9 of the relevant storage row 12 pushes a fresh empty tube 6 from the tube receiving mandrel 19 onto the cross conveyor belt 17 arranged behind the tube magazine 2, which transports the empty tube 6 to one of the machine-length empty tube conveyor belts 16. The empty tube conveyor belt 16 then brings the empty tube 6 to the workstation 4 that requested the empty tube 6 and at which one of the service units 5 is already positioned.

[0034] The Fig. 2shows a plan view of an open-end rotor spinning machine 1. As can be seen, the open-end rotor spinning machine 1 is equipped with a cross-wound bobbin transport device 14 and an empty bobbin supply device. The empty bobbin supply device consists, as can be seen, of a bobbin magazine 2, which is equipped with a plurality of storage rows 12 for receiving empty bobbins 6. The storage rows 12 each have an individual drive 18, which is designed, for example, as a stepper motor and is connected, for example, via a bobbin magazine control 15 and a bus system 13 to the central control unit 11 of the open-end rotor spinning machine 1, which is installed in the machine end frame 10 of the textile machine. The individual drives 18 and thus the storage rows 12 of the bobbin magazine 2 can be driven in a defined manner via the central control unit 11 of the open-end rotor spinning machine 1.The service units 5, which supply the workstations 4 in the event of an operation, are also connected to the central control unit 11 via the bus system 13.

[0035] The cartridge magazine 2 also has, as in Fig. 1 indicated, via a plurality of tube strippers 9, each of which is assigned to one of the storage rows 12 of the tube magazine 2 and can be controlled separately. These separately controllable tube strippers 9, when required, i.e. when a corresponding request for an empty tube 6 is received at the central control unit 11 from one of the work stations 4, and activated by the latter, push an empty tube 6 from the storage row 12, which is equipped with empty tubes 6 of the requested yarn batch, onto a cross conveyor belt 17 arranged behind the storage rows 12. The cross conveyor belt 17 then immediately conveys the empty tube 6 to the empty tube conveyor belt 16 at which the work station 4 that requested the empty tube 6 is located.

[0036] The Fig. 3 shows an embodiment of a tube magazine 2 designed according to the invention in a side view and in section. Such tube magazines 2 arranged at the machine end of an open-end rotor spinning machine 1 have a plurality of such storage rows 12 arranged side by side. According to the embodiment of the Fig. 2 For example, the tube magazine 2 has twelve of these storage rows 12, which are arranged according to the viewing direction of the Fig. 3 are arranged one behind the other. In Fig. 3 Only one of these storage rows 12 is shown in side view. As can be seen, each of the storage rows 12 has an endless traction device 20, which is guided over deflection rollers 21 and has a plurality of tube receiving mandrels 19, on each of which an empty tube 6 can be deposited in a tip-oriented manner.

[0037] One of the deflection rollers 21 is equipped with an individual drive 18, which is connected to the control unit 15 of the tube magazine 2 via a control line 22. By means of this individual drive 18, the endless traction device 20 can be moved, thus positioning the tube receiving mandrels 19 with the empty tubes 6 in a functional manner.

[0038] According to the invention, each of the storage rows 12 of the tube magazine 2 is also equipped with its own separately controllable tube stripper 9, which can, when required, immediately push an empty tube 6 from its tube receiving mandrel 19 and thereby convey it in the direction of the empty tube conveyor belts 16. This means that in the present embodiment, the tube stripper 9 first pushes the empty tube 6 onto a chute 23, via which the empty tube 6 is transferred to the cross conveyor belt 17. The cross conveyor belt 17, which is reversibly drivable, transports the empty tube 6 to the empty tube conveyor belt 19 at which the workstation 4 that requested the empty tube 6 is located.

[0039] The separately controllable sleeve strippers 9 can have various designs, particularly with regard to their drive. The sleeve stripper 9 can be driven pneumatically or electrically, for example.

[0040] In the illustrated embodiment, the tube strippers 9 are designed as pneumatically activated tube strippers 9. This means that a pneumatic cylinder 24 is installed below one of the upper deflection rollers 21 for the endless traction device 20 of the storage row 12, to whose piston rod a stripper plate 25 is connected. The stripper plate 25 is designed such that, when the pneumatic cylinder 24 is extended, it can slide past the endless traction device 20 and push the empty tube 6 off its tube receiving mandrel 19. As usual, compressed air lines connected to a compressed air source 27 are connected to the pneumatic cylinder 24. In addition, a pneumatic valve 26, which can be switched magnetically, for example, is connected to the compressed air lines and is connected via a control line 28 to the control unit 15 of the tube magazine 2 and via the bus system 13 to the central control unit 11 of the open-end rotor spinning machine 1. Function of the facility:

[0041] Before each start of operation of the cross-wound bobbin-producing textile machine, the tube magazine 2 is first "loaded." This means that the numerous storage rows 12 of the tube magazine 2 are each loaded with empty tubes 6 of a specific yarn batch. Storage rows 12 arranged next to each other can be loaded, as required, either with empty tubes 6 of the same yarn batch or with empty tubes 6 of other yarn batches. The corresponding loading is also entered, for example via a keyboard, into the central control unit 11 of the open-end rotor spinning machine 1. This then ensures, during the subsequent spinning / winding process, that an empty tube 6 of the correct yarn batch is always delivered to the requesting workstation 4 when needed.This means that if, during regular spinning / winding operation, a cross-wound bobbin / empty tube change is required at one of the work stations 4 because the cross-wound bobbin 7 has reached its prescribed diameter and must be replaced with a fresh empty tube 6 as quickly as possible, the control device of the relevant work station 4 requests a service unit 5, for example a change and cleaner carriage, which then moves to the relevant work station 4 and engages there. Subsequently, the service unit 5 initiates a cross-wound bobbin / empty tube change, i.e., the finished cross-wound bobbin 7 is transferred by the service unit 5 to a cross-wound bobbin transport device 14 arranged behind the work stations 4 and transported from there to a bobbin transfer station arranged at the end of the machine.

[0042] Subsequently or simultaneously, the service unit 5 or the relevant work station 4 requests a fresh empty tube 6 of the relevant yarn batch from the central control unit 11 of the open-end rotor spinning machine 1 via the bus system 13.

[0043] The central control unit 11 then activates the control 15 of the tube magazine 2 via the bus system 13 so that an empty tube delivery process is immediately initiated. This means that in the area of ​​the tube magazine 2, the tube stripper 9 is activated, which is assigned to the storage row 12 equipped with empty tubes 6 of the requested yarn batch. This means that a tube stripper 9, equipped, for example, with a pneumatic cylinder 24, pushes an empty tube 6 with its stripper plate 25 from the empty tube receiving mandrel 19 of the storage row 12 onto a downstream chute 23, which forwards the empty tube 6 to a reversibly drivable cross conveyor belt 17. The cross conveyor belt 17 immediately transfers the empty tube 6 to the empty tube conveyor belt 16, where the workstation 4 that requested the empty tube 6 is located.The relevant empty tube conveyor belt 16 then conveys the requested empty tube 6 as quickly as possible, tip-oriented, to the relevant work station 4, where the empty tube 6 is picked up by the service unit 5 and inserted into the spool frame of the spooling device of the work station 4.

[0044] The cross-wound bobbin / empty tube change cycle is thus completed and a new spinning / winding process can be started at the relevant work station 4. List of reference symbols

[0045] 1Open-end rotor spinning machine 2Core magazine 3Open-end spinning device 4Workstation 5Service unit 6Empty core 7Cross bobbin 8Spinning can 9Core stripper 10Machine end frame 11Central control unit 12Memory row 13Bus system 14Cross bobbin transport device 15Core magazine control 16Empty core conveyor 17Cross conveyor 18Single drive 19Core take-up mandrel 20Endless pulling means 21Deflection roller 22Control line 23Slide 24Pneumatic cylinder 25Strip sheet 26Pneumatic valve 27Compressed air source 28Control line

Claims

1. Tube magazine (2) for a textile machine (1) producing cross-wound bobbins, which textile machine has a plurality of work stations (4) on both longitudinal sides of the machine, the tube magazine (2) having a plurality of drivable, adjacently arranged storage rows (12) which can be fitted with empty tubes (6) and which each have a continuous traction means (20) which is guided over deflection rollers (21), the tube magazine also having a plurality of tube receiving arbors (19), on each of which an empty tube (6) can be deposited in a tip-oriented manner, and the tube magazine (2) having a tube stripper (9) via which empty tubes (6) are transferable to a downstream transverse conveyor belt (17), characterized in that the tube magazine (2) is equipped with a plurality of tube strippers (9), each of which can be controlled separately as required, each of the storage rows (12) of the tube magazine (2) having its own tube stripper (9) which can be controlled in a defined manner, and one of the deflection rollers (21) being equipped with an individual drive (18) which is connected to the control (15) of the tube magazine (2) via a control line (22).

2. Tube magazine (2) according to any of the preceding claims, characterized in that each of the tube strippers (9) has a pneumatic drive which has a pneumatic cylinder (24).

3. Tube magazine (2) according to any of the preceding claims, characterized in that each of the tube strippers (9) is equipped with an electric drive.

4. Tube magazine (2) according to any of the preceding claims, characterized in that each of the storage rows (12) of the tube magazine (2) is fitted with empty tubes (6) of the same yarn batch respectively.

5. Tube magazine (2) according to any of the preceding claims, characterized in that different storage rows (12) of the tube magazine (2) can be fitted with empty tubes (6) of different yarn batches.

6. Method for operating a tube magazine (2) for a textile machine (1) producing cross-wound bobbins, which textile machine has a plurality of work stations (4) on both longitudinal sides of the machine, the tube magazine (2) having a plurality of drivable, adjacently arranged storage rows (12), each of which can be fitted with empty tubes (6) and which each have a continuous traction means which is guided over deflection rollers (21), the tube magazine also having a plurality of tube receiving arbors (19), on each of which an empty tube (6) can be deposited in a tip-oriented manner, and the empty tubes (6) being transferable to a downstream transverse conveyor belt (17) by means of a tube stripper (9), characterized in that when an empty tube (6) is requested by a work station (4), a separately arranged tube stripper (9) of the storage row (12), which tube stripper can be controlled in a defined manner, is immediately activated, the storage row being fitted with empty tubes (6) of the requested yarn batch, and in that one of the deflection rollers (21) is equipped with an individual drive (18), which is connected to the control (15) of the tube magazine (2) via a control line (22), the continuous traction means is moved by means of the individual drive and the tube receiving arbors (19) together with the empty tubes (6) are thus positioned functionally.