Patent Application
20200080238
The present invention relates to a method for feeding a sliver end of a sliver deposited in a can at a spinning station of a spinning machine. The spinning machine comprises a plurality of adjacently arranged spinning stations including cans located under the spinning stations in at least one row. A robot comprising a sliver gripper grasps the sliver end and feeds it to a spinning station to be supplied. In the case of a spinning machine comprising a plurality of adjacently arranged spinning stations and comprising a robot including a sliver gripper, and comprising cans, containing a sliver, located under the spinning stations in at least one row, a sliver end of a sliver deposited in a can is pieced at a spinning station of the spinning machine to be supplied, wherein, for the purpose of feeding the sliver end, the sliver gripper is equipped with elements for gripping the sliver end and feeding it to the spinning station.
DE 10 2005 009 766 A1 describes a service unit for fiber-processing textile machines comprising a plurality of workstations, which includes a handling device for manipulating sliver. The handling device grasps the sliver with the aid of a suction tube and a mechanical and/or pneumatic holding device for the sliver. The suction tube includes a flattened suction tube opening, with the aid of which a sliver end hanging over a can may be drawn in across a relatively wide area. It is disadvantageous in this case that the wide suction tube opening also cannot find the sliver end when the sliver end does not hang over the rim of the can in the area of the workstation to be supplied.
DE 42 04 044 A1 describes a manipulator, which comprises, on its free end, a suction nozzle for taking up and holding the beginning of a sliver. The sliver is held at the can in a clamp, and so the end of the sliver is always to be found at a defined position. The manipulator can therefore grip at this point in a targeted manner and grasp the sliver. It is disadvantageous in this case that each can must be equipped with a clamp and the can must have been placed in a certain direction of rotation at the machine, so that the manipulator can find the sliver end.
DE 43 21 367 A1 describes a device for automatically laying a sliver onto a feed device of a textile machine. The sliver is grasped and is fed to the spinning machine. The grasping of the sliver is facilitated due to the fact that so-called elongate cans are utilized, which are located only under a single spinning station and have a width, which is less than the width of the spinning station itself. As a result, the area in which the sliver end can be located is limited. Elongate cans are more expensive to procure than round cans, however, and require special machines, with the aid of which the sliver can be deposited into the elongate cans.
The problem addressed by the present invention is therefore that of creating a method and a spinning machine, with the aid of which the described disadvantages are to be avoided.
The problem is solved using a method and a spinning machine having the features of the independent claims.
The present invention is utilized for feeding a sliver end of a sliver deposited in a can to a spinning station of a spinning machine. The spinning machine comprises a plurality of adjacently arranged spinning stations including cans located under the spinning stations in at least one row. The cans are preferably round cans. A robot grasps the sliver end with the aid of a sliver gripper and feeds it to a spinning station to be supplied. The sliver end is sought in an area of at least one of the adjacent spinning stations of the spinning station to be supplied, preferably in the area of the spinning station to be supplied and additionally in the area of at least one of the spinning stations adjacent to this spinning station, and is taken up by the sliver gripper. Thereafter, the sliver end is fed to the spinning station to be supplied.
The feeding takes place in that the sliver is inserted into a feed drive of the spinning station equipped with a feed roller. The feed roller can be driven, whereby, once a sliver has been inserted, the spinning operation is restarted and the sliver is continuously drawn into the spinning station.
Due to their large diameter, round cans typically extend along the width of two spinning stations. As a result, when the robot has been positioned with respect to a spinning station, it is possible that the sliver end is to be found either in the area of this spinning station to be supplied or in the area of the adjacent spinning station. With the aid of the method according to the invention, it is now ensured that the sliver end can be reliably grasped, since the sliver gripper seeks the sliver at least in the area of the adjacent spinning station, preferably also additionally in the area of the spinning station to be supplied.
In an advantageous embodiment of the invention, the robot is moved along the spinning machine and is positioned with respect to the spinning station to be supplied or with respect to the spinning station adjacent thereto. The robot can be precisely allocated to this spinning machine with the aid of a running rail laid at this spinning machine. In this case, the robot generally not only feeds the sliver to the spinning station, it also carries out further tasks, which include, for example, piecing a thread, cleaning the spinning station, or exchanging bobbins at the spinning station. Alternatively, the robot can be designed as a can-conveying carriage, which moves along one or multiple spinning machines and not only feeds a sliver to the spinning station, but also exchanges the sliver cans, i.e., replaces the empty sliver can with a full sliver can. It is also possible, of course, that the robot moves along multiple spinning machines similarly to a can-conveying carriage and essentially is responsible only for feeding the sliver to the spinning station.
For the case in which the robot has been positioned with respect to a spinning station adjacent to the spinning station to be supplied, it is preferably provided that the robot is moved, together with the taken-up sliver and before the sliver has been fed into the feed drive of the spinning station, into a position in front of the spinning station to be supplied. As a result, the robot is able to take up the sliver directly at the full can that has been provided for the further spinning. It is particularly easy for the robot to grasp the sliver when the robot has been positioned at the adjacent spinning station in this way, since the robot can execute the same movements for each of the two adjacent spinning stations. As soon as the robot has grasped the sliver, the robot positions the sliver exactly in front of the spinning station to be supplied and is therefore able to insert the sliver end highly precisely into the feed drive of the spinning station.
Advantageously, the sliver gripper is moved in relation to the robot along the spinning machine to an adjacent spinning station and/or to a can located in a second row. Therefore, even when a robot is at a standstill, the sliver gripper is able to seek the sliver in a predefined area, which can be larger than the actual area that the sliver gripper itself can reach. In this case, it is possible, although not absolutely necessary, that the robot is immediately positioned at the spinning station to be supplied and, with the aid of an appropriate movement of the sliver gripper, seeks and grasps the sliver in the area of the adjacent spinning station or in the second row of the positioned cans and inserts the sliver into the feed drive of the spinning station.
Preferably, it is provided that the sliver gripper can take up the sliver simultaneously from multiple possible positions at adjacent spinning stations. Therefore, it is possible that the sliver gripper seeks the sliver at the spinning station to be supplied as well as at adjacent spinning stations arranged to the left or the right of this spinning station and, there, grasps the sliver.
In an advantageous embodiment of the invention, it is provided that the sliver gripper seeks the sliver on the top side of the can and/or on the circumference of the can. When the sliver gripper seeks the sliver on the top side of the can, it is further advantageous when the sliver end is deposited in a chord-like manner on the top side of the can. Therefore, a defined area is specified, in which the sliver gripper can find the sliver end. When the sliver is located on the circumference of the can, it is possible that the sliver is fixed on the can in a defined position or hangs out of the can at least at this position. It is therefore also easily possible for the sliver gripper to quickly find and grasp the sliver end.
A spinning machine according to the invention comprises a plurality of adjacently arranged spinning stations and a robot, on which a sliver gripper is arranged. Cans comprising a sliver and positioned in at least one row are located under the spinning stations. In order to feed a sliver end of a sliver deposited in a can to a spinning station of the spinning machine to be supplied, the sliver gripper is equipped in such a way that it can grasp the sliver end and feed it to the spinning station. For this purpose, the sliver gripper is designed and/or arranged on the robot in such a way that it can take up the sliver end in an area of at least one spinning station, which is adjacent to the spinning station to be supplied, preferably in the area of the spinning station to be supplied and additionally at at least one of the spinning stations adjacent to this spinning station, and then feed the sliver end to the spinning station to be supplied. The sliver gripper is therefore able to reliably find the sliver end and feed the sliver end, in a targeted manner, to the spinning station at which the sliver is lacking, so that the spinning process can be continued at this spinning station.
The invention is directed to the consideration that, in the case of round sliver cans having a diameter approximately corresponding to the width of two spinning stations, the sliver is located either in the area of the spinning station to be supplied or in the area of the adjacent spinning station and is more likely to be found there. It is particularly advantageous when the robot is designed in such a way that it finds the sliver end at only one single spinning station. The likelihood of finding the sliver is therefore greater. As a result, it can also be necessary, however, to position the robot at the adjacent spinning station in order to be able to find the sliver end. As soon as the sliver end has been grasped by the sliver gripper, the robot can be moved, together with the sliver end, into the correct position in front of the spinning station to be supplied and, there, can feed the sliver end to the feed drive of the spinning station. If the sliver end is located in front of the spinning station to be supplied and not at the adjacent spinning station, however, it can also be advantageous when the robot is already positioned correctly and directly in front of the spinning station to be supplied and the sliver gripper seeks and grasps the sliver end there. Provided the sliver end is located between the two spinning stations, it can be advantageous, depending on the design of the sliver gripper, that the robot is positioned either at the adjacent spinning station or at the spinning station to be supplied in order to find the sliver end.
If the robot is advantageously arranged stationarily at the spinning station and/or at a can changer, and/or at the spinning machine so as to be movable along the spinning machine, an approach for feeding the sliver end can be individually provided depending on the necessary productivity of the machine. In the case that the robot is stationarily arranged at the spinning station, it is necessary that each of the plurality of spinning stations at the spinning machine comprises a robot, which can insert the sliver into the feed drive. It is advantageous in this case that a mobile robot does not first need to be requested and, therefore, no waiting time is necessary before the sliver can be pieced. If the robot is situated at a can changer, the feeding of the sliver or at least a preparation for the feeding of the sliver to the feed drive of the spinning station can be carried out together with the exchange of an empty can for a new, full can. The individual spinning station can grasp this presented sliver, if necessary, or draw it into the feed drive and continue the spinning process. In a further alternative, the robot at the spinning machine is movable along this spinning machine. This means, the robot is guided, for example, on a rail of the spinning machine and patrols along the spinning machine. After a can change has been carried out, the robot moves along the spinning machine up to the spinning station to be supplied and carries out the feeding of the sliver. In this case, it is particularly advantageous that the precise positioning of the robot in front of the spinning station can also be utilized for further service actions at the spinning station, for example, feeding a thread or cleaning the spinning station.
In a very particularly advantageous embodiment of the invention, the robot is movable along multiple spinning machines. The robot can therefore switch from one spinning machine to another spinning machine. Waiting times of the robot until a further service requirement or sliver change must be carried out can be kept short as a result.
It is advantageous when the sliver gripper is designed to be movable in relation to the robot along the spinning machine to an adjacent spinning station and/or to a can located in a second row. In the event that a robot is at a standstill in front of or next to the spinning station to be supplied, it is therefore possible for the sliver gripper to seek and grasp the sliver end in a larger area than the sliver gripper would permit per se. The situation is therefore avoided, in which the robot must be repositioned after the sliver end has been found, in order to feed the sliver end to the spinning station to be supplied.
In an advantageous embodiment of the sliver gripper, the sliver gripper is able to simultaneously take up the sliver from multiple possible positions at adjacent spinning stations.
A particularly advantageous embodiment of the sliver gripper consists, for example, of a very wide sliver gripper, which accesses the area of the spinning station to be supplied as well as the adjacent spinning station and simultaneously seeks the sliver end. It is advantageous in this case when the sliver gripper has a width in order to be able to grasp the sliver end at at least two adjacent spinning stations.
In an advantageous embodiment of the invention, if the sliver gripper comprises a suction unit, which is suitable for drawing in the sliver end, the sliver end can simultaneously seek the sliver end in a larger area than is the case with a mechanical gripper.
In a particularly advantageous embodiment of the invention, the sliver gripper comprises a blowing unit for feeding the sliver end into the feed drive of the spinning station. The insertion of the sliver end into the feed drive of the spinning station can therefore be very easily and reliably carried out.
Further advantages of the invention are described in the following exemplary embodiments. Wherein:
In the following description of the alternative exemplary embodiments represented in the figures, the same reference signs are utilized for features that are identical or at least comparable in terms of their configuration and/or mode of operation. Provided the features are not described in detail again, their design and/or mode of operation correspond/corresponds to the design and mode of operation of the above-described features.
When the sliver 8 contained in the can 9 has been used up, the can 9 is exchanged for a full can 9 The sliver end 2 of the sliver 8 contained therein hangs, for example, over the upper rim of the can 9a, as represented by the can 9a. The sliver 8 is lacking at the spinning station 3a to be supplied, at which the sliver 8 is to be pieced in order for the spinning operation to be continued. The adjacent spinning station 3b continues to receive its sliver 8 from a can 9b, which is arranged, not visibly, behind the can 9a in a second row. The sliver end 2, which hangs over the rim of the can 9a, can be located either in an area Ba below the spinning station 3a to be supplied or in the area Bb below the adjacent spinning station 3b.
A robot 12 is located in front of the adjacent spinning station 3b, as indicated with the aid of a center line M. The robot 12 can be moved along the spinning machine 1 as indicated by the double arrow V. When a spinning station 3 reports to a control unit that service is required, for example, a sliver 8 is lacking at a certain spinning station 3, the robot 12 is stopped at this spinning station 3, specifically in this case the spinning station 3a to be supplied or the adjacent spinning station 3b, and begins its service work. In the representation of
A sliver piecing unit 13, on which a sliver gripper 14 is located, is arranged on the robot 12. In the exemplary embodiment represented here, the sliver gripper 14 is a suction tube, which is capable of drawing in the sliver end 2. The sliver gripper 14 can be swiveled according to the double arrow S, so that it can move the drawn-in sliver end 2 in the direction of the feed drive 11 for feeding the sliver end 2 at the spinning station 3a.
The sliver gripper 14 can also be designed in a way other than a pneumatically operated suction tube, of course. For example, a mechanical gripper is also possible, which grasps the sliver end 2 at the can 9a.
According to the exemplary embodiment of
When the sliver end 2 has been inserted into the feed drive 11 and the spinning process is ready for spinning yarn 7 once more or is underway again, the robot 12 leaves the spinning station 3a to be supplied and carries out further service work at other spinning stations 3.
As is apparent from the exemplary embodiment of
Alternatively, it could also be possible that the sliver gripper 14 is designed in such a way that it seeks and grasps the sliver end 2 in the area Bb of the adjacent spinning station 3b on the one hand, but, thereafter, inserts the sliver end 2 into the feed drive 11 of the spinning station 3a to be supplied without a further movement of the robot 12, for example, with the aid of an articulated or telescopic movement of the sliver gripper 14.
The different piecings with and without a movement of the robot 12 according to
As further indicated in the exemplary embodiment of
A further exemplary embodiment of the invention is represented in
The sliver piecing unit 13 can also be designed to be vertically as well as horizontally displaceable, of course, according to the double arrow RV and, additionally, according to the double arrow RH.
In another alternative, the sliver end 2 has been presented hanging over the rim of the can, as represented in the can 9a in the first row R1. In this case, the sliver gripper 14 can grasp the sliver end 2 on the circumference 15 of the can 9a and feed it to the spinning station 3a to be supplied, as described above with respect to the other exemplary embodiments.
Of course, the sliver end 2 lying over the top side 16 can also be presented in the case of a can 9a of the first row R1 and the sliver end 2 hanging over the circumference 15 of the can 9a can also be presented in the case of a can 9a of the second row R2 to be supplied.
The present invention is not limited to the represented and described exemplary embodiments. Modifications within the scope of the claims are also possible, as is a combination of the features individually or in any combination, even if they are represented and described in different exemplary embodiments.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2018 121 906.7 | Sep 2018 | DE | national |
