Device for providing a band of material, in particular a cord band

Abstract

Device for supplying a material tape, in particular a cord tape, comprising: - a disentanglement device (2) for disentangling a material tape, comprising two receptacles (18, 20) for each of a material tape roll (4, 4a, 4b), wherein both receptacles (18, 20) are movable from a non-working position in which a roll (3, 3a, 3b) is received and a working position in which the roll is disentangled, - a transport device (5) downstream of the disentangling device (2) for the disentangled material tape (4, 4a, 4b), - a device (13) for joining a rear end (19) of the disentangled material tape to a front end of the material tape to be disentangled, - a position detection device (10) with a sensor device (11) for detecting sensor information describing the position of the tape material in the receptacles, and a control device (12) for detecting position information based on the sensor information,wherein, depending on the position information, the position of the material strip to be unwound (4a, 4c) relative to the unwound material strip (4b) can be aligned, wherein the sensor information can be acquired by means of the sensor device (11) during the movement of the supports (18, 20) from the non-working position to the working position, and the control device (12) for determining the position information and for controlling actuating means (22, 39) for moving the respective support transversely to the transport direction of the transport device is configured, depending on the position information, such that the respective support is positioned at the end of the movement into the working position such that the end of the material strip to be unwound is aligned with the end of the unwound material strip.

Description

[0001] The invention relates to a device for providing a material tape, in particular a cord tape, comprising: An unwinding device for unwinding a material strip received in the form of a roll, comprising a first and a separate second receiving device for each receiving a roll of the material strip, wherein the first and the second receiving device are each reversibly movable from a non-working position, in which a roll is received or prepared, and a working position, in which the roll is unwound; a transport device downstream of the unwinding device for receiving the unwound material strip; a device for connecting a rear end of the unwound material strip located on the transport device to a front end of the material strip to be unwound; a position detection device comprising a sensor device for receiving sensor information describing the position of the strip material to be unwound in the first and the second receiving device.as well as a control device for acquiring position information based on sensor information, wherein, depending on the position information, the position of the material strip to be unwound can be aligned relative to the unwound material strip.

[0002] Such a device for supplying a strip material is used in the strip or web processing industry, for example, the tire industry. The strip material is, for example, a cord, usually an adhesive material, such as a textile cord or steel cord. The device serves to unwind a strip of material, which is typically held wound onto a roll as the output strip, and to make it available for downstream processing. For processing, the strip of material is unwound, i.e., rolled out, fed through the production process, and rewound at the end of the system. Such a device is described, for example, in DE 20 2013 103 530 U1.

[0003] The device itself comprises an unwinding unit for unwinding the material strip, which is supplied in the form of a roll. The material strip is wound regularly onto a spool core, over which it is held in a receptacle of the unwinding unit. The receptacle allows the roll to rotate for unwinding. The unwinding unit comprises a first and a separate second receptacle, each for holding a roll of the material strip, with the two receptacles offset from each other. Each receptacle is reversibly movable from a non-working position, in which a roll is loaded or prepared, to a working position, in which the roll is unwound. In the non-working position, a new roll can be loaded into the respective receptacle, i.e., inserted or removed.The process involves preparing the free end of the new material strip, positioning it so that, as explained below, it can be connected to the rear end of the previously unwound or cut material strip. In the working position, the strip is unwound. Both fixtures are reversibly movable between the non-working and working positions; that is, one fixture can be in the non-working position and loaded while the other is in the working position and the strip is unwound.

[0004] A transport device for receiving the unwound material strip is connected downstream of the unwinding unit. This transport device typically includes a roller assembly that serves as both a take-off and guide roller. The transport device actively moves the material strip, thus unwinding the roll, and simultaneously transports the material strip to a downstream processing unit.

[0005] Furthermore, a device is provided for connecting a rear end of the unwound material strip located on the transport device to a front end of the material strip to be unwound. This connecting device, which in the case of an adhesive cord strip such as that used in the tire industry as described, is a splicing device, serves to connect the rear end of the unwound strip with the front end of the strip to be unwound, so that the two strips from different rolls are joined together, thus creating an endless strip.

[0006] Furthermore, a position detection device comprises a sensor device for acquiring sensor information describing the position of the strip material to be unwound in the first and second stages, and a control device for acquiring position information based on the sensor information, whereby the position of the material strip to be unwound can be aligned relative to the unwound material strip depending on the position information. As described, the two ends of the unwound and the material strip to be unwound are joined together in the connection device, i.e., the splicing device.For this purpose, the two ends, and thus ultimately the edges, must be aligned with each other to prevent an unwanted lateral offset between the two tape ends during joining. Such an offset would result in the subsequently unwound tape being fed into the downstream processing unit in an undesirable lateral position. This offset can occur because, as described, the material tape is wound onto a spool or core, which holds and stores it in the fixture. It can happen that the tape is wound off-center onto the spool core, meaning that a lateral offset of a few millimeters to centimeters occurs. Since the spool core is always held in the same position within the fixture, this lateral offset would then connect the tape being unwound to the unwound tape.To compensate for this lateral offset, a position detection device is provided, which uses a sensor system to acquire sensor information. Based on this information, an associated control unit then acquires positional information about the strip being unwound. This allows for a corresponding correction to the working position, meaning the strip being unwound is adjusted accordingly in its final position so that the two ends are aligned with each other.

[0007] In a known setup, suitable optics are used to detect the outer edges of the new material roll, which is already in the working position. For this purpose, the optics must be positioned accordingly. After detecting the edges, the current position of the new material roll is known. The optics also detect the edges of the unwound roll, allowing for verification of any lateral misalignment. If misalignment is detected, the actual working position is corrected accordingly; that is, the unwinding device is readjusted. This is achieved by linearly moving the sensors.The unwinding device can be designed as a shuttle system, in which the two fixtures are arranged on a linearly movable support frame. This allows the two fixtures to be moved between the non-working and working positions by lateral displacement relative to the unwinding direction. In such a case, the alignment or tracking is achieved by a slight lateral displacement as part of the correction of the working position. Another design of an unwinding device is a rotary device. Here, both fixtures are arranged on a rotating frame that can be turned about an axis of rotation. This means they are moved between the non-working and working positions by a rotary motion. The rotating frame is also mounted to allow linear movement.If a correction of an initially adopted working position is necessary, this is done by a slight lateral displacement of the rotating frame and with it the recordings, depending on the given offset.

[0008] While this allows for correction or readjustment, the process is complex because it first requires returning to the original working position, then positioning the optics accordingly, and finally acquiring and evaluating the sensor information before any necessary readjustment can be made. This naturally involves a significant amount of time.

[0009] The invention therefore addresses the problem of providing an improved device for supplying a tape material.

[0010] To solve the problem, in a device of the type mentioned at the outset, the invention provides that the sensor information can be detected by means of the sensor device during the movement of the first and second receivers from the non-working position to the working position, and that the control device for determining the position information and for controlling the actuating means for moving the first and second receivers transversely to the transport direction of the transport device is set up as a function of the position information such that the first and second receivers are positioned at the end of the movement into the working position such that the end of the material strip to be unwound is aligned with the end of the unwound material strip.

[0011] In the supply device according to the invention, the relevant position information for the new tape to be subsequently unwound is acquired during its movement from the non-working position to the working position. The sensor device is arranged and configured such that, during the movement of the respective first or second holder from the non-working position, i.e., after the new tape roll has been inserted into the holder, to the working position for unwinding, the sensor information is acquired that allows for the determination or characterization of the tape's position in the holder, thus ultimately enabling the determination of the actual position of the tape winding on the spool core and therefore in the holder.The control unit is now able to use this sensor information to determine the exact position of the working position into which the fixture is to be moved during the movement into the working position. It then controls the positioning devices that move the fixture perpendicular to the conveyor belt's direction of travel during unwinding, ensuring that the final working position is reached immediately. This means that, in a single movement from the non-working position to the working position, the new belt roll, and thus its end to be joined, is precisely in the final joining position for connecting to the end of the unwound belt, and therefore in a perfectly aligned position. Consequently, there is no need for a non-specific approach to a working position followed by a position correction.

[0012] The device according to the invention therefore allows for a significantly more efficient and faster provision of a new roll of material tape, which is precisely aligned so that the joining of the two ends can take place almost immediately upon entering the working position, followed by the unwinding of the new tape. This means that the feeding process is interrupted only for a very short time.

[0013] The sensor device itself expediently comprises at least one first sensor and at least one second sensor, the first sensor being located in the path of movement of one recording device and the second sensor in the path of movement of the other recording device. Thus, at least two separate sensors are used, one assigned to one recording device and the other to the other. Both are positioned in the respective path of movement of the recording device, meaning they are located where the recording device, and consequently the material tape roll, moves past, so that the relevant sensor information, particularly regarding the position of the tape's longitudinal edges, is captured as the tape passes the respective sensor. The sensors are, of course, positioned so that the tape moves as close to them as possible.

[0014] In a further development of the invention, the detection device may include at least one third sensor, which is associated with the transport device and uses this sensor to detect position information describing the position of the end of the unwound strip material in or on the transport device. The control device is configured to determine further position information based on the sensor information and to control the actuating means of the first and second receiving devices depending on this further position information. This third sensor, which is part of the detection device, is associated with the transport device.This device allows for the acquisition of relevant information about the end of the unwound belt, enabling the control system to determine the actual position of the outgoing belt end. This actual position ultimately represents the target position against which the end of the new, incoming belt, or the receiving unit, is aligned. The control system, which also determines corresponding position information for the unwound, outgoing belt, is configured to incorporate this position information into the control of the actuators that regulate the movement of the respective receiving unit. This means it determines the appropriate control parameters for these actuators, taking into account both the position information for the new, incoming belt and the position information for the old, unwound belt.

[0015] In a simpler alternative, such a third sensor can be omitted, since the edge position of the unwound tape was originally measured when it was still in the fixture and being positioned. It can be assumed that the position of the end of the unwound tape does not differ from the position of the beginning. This means that the respective fixture can be aligned with the previously recorded position of the earlier tape. However, slight winding inaccuracies can occur when the tape is wound onto the material roll, or the tape can be slightly misaligned during unwinding. Therefore, a misalignment of a few millimeters or centimeters at the tape end cannot be entirely ruled out. For this reason, recording the current position of the end of the unwound tape is advisable.

[0016] If such a third sensor is used, it is advantageous to detect the entire width of the unwound material strip. This is advantageous because both longitudinal edges can be detected by the sensor. The sensor itself is, of course, fixed in position, just as the end of the strip is fixed in position, meaning it does not move laterally.

[0017] In a further development of the invention, it can be provided that the control device can determine the position of one or both longitudinal edges of the material strip to be unwound, and / or the position of one or both longitudinal edges of the unwound material strip, based on which position information the positioning means can be controlled. Thus, at least one longitudinal edge of the strip to be unwound is detected, and if the strip width is known, the position of the second longitudinal edge is automatically known as well. Naturally, the radiation device can also determine the position of both longitudinal edges, since both are moved through the detection range of the sensor.The longitudinal edge position is in every case the basis for the subsequent determination of the corresponding control information, which is used to actuate the positioning devices in order to reach the final working position in a single movement. For the unwound, i.e., moving, belt, the position information for the longitudinal edge(s) is either known from the previous work cycle, or it is acquired via the third sensor, as described. In any case, based on the longitudinal edge information, the two belts or their ends can be aligned with respect to at least one longitudinal edge of the two belts, provided the belts nominally have the same width.

[0018] An alternative design, in contrast, provides that the control device for determining the center position of the material strip to be unwound uses position information based on the position of the longitudinal edges of the material strip being unwound and / or the center position of the unwound material strip as further position information based on the position of the longitudinal edges of the unwound material strip, and for controlling the positioning devices such that the center of the strip being unwound aligns with the center of the unwound strip. According to this design, the two strips or strip ends are not aligned with respect to a longitudinal edge, but rather with respect to their respective center points.This design is particularly advantageous because, firstly, the actual width of the two nominally equally wide strips can vary slightly, and secondly, a narrower strip can be joined to a wider one if a deliberate change in width is desired. If, in this case, the two ends or strips are aligned with their respective centers, it is ensured that the new strip is fed into the transport device in a comparable position and conveyed further. The basis for determining the center of the new strip to be unwound is the prior determination of the position of both longitudinal edges, from which the exact width, and thus the center, can be calculated. The center of the unwound strip can be determined in the same way from the originally recorded longitudinal edge position data or from the newly recorded position data for the longitudinal edges of the end.This is done using the common control system.

[0019] As described, the two ends are to be joined together, for which purpose the joining device is provided, i.e., a suitable splicing device comprising a preparation strip and a splice strip. It is customary to fix the leading end of the strip to be unwound, which is to be spliced ​​to the trailing end of the unwound strip, to a preparation strip in its non-working position, which can also be referred to as the preparation position. In the case of a shuttle-type unwinding device, each receptacle is assigned a separate preparation strip; in the case of a rotary-frame-type unwinding device, each receptacle can also be assigned a separate preparation strip, but preferably a pivotable preparation strip is provided, which, in the case of receptacles arranged in opposite directions, can be assigned to the receptacle in its respective non-working position by pivoting it.In any case, the end of the new material strip is fixed to this preparation bar. However, it is positioned in such a way that this end is transported past the respective assigned sensor; that is, the first and second sensors are positioned below the level at which the preparation bar moves past them. This ensures that the strip end is inevitably moved through the detection range of the respective sensor.

[0020] As described, two fundamentally different designs of the unwinding device are conceivable: a shuttle design and a rotary frame design. In the case of a shuttle design, the two fixtures are arranged on a common support frame or on separate support frames, which are movable on linear guides in a direction perpendicular to the transport direction of the conveyor system via actuating means. The first and second sensors are offset on either side of the conveyor system. The two fixtures can be moved linearly and perpendicular to the conveyor system's transport direction via the common support frame or the two separate support frames. They can thus be moved into the appropriate position by mutual movement, with the two non-working positions spaced apart and the working position located between them.For this purpose, the support frame(s) are mounted on suitable linear guides so that they can move linearly, with the actuating means effecting the linear movement. The movement is achieved, for example, via one or more suitable spindle drives controlled by servo motors or similar devices. The two sensors are arranged offset on both sides of the transport device, i.e., at a position where the respective material belt roll is moved past it across its entire width, so that each sensor can easily detect both longitudinal edges.

[0021] In the case of a rotating frame design, the sensors are arranged on a common rotating frame that can be turned around a pivot axis via a drive mechanism. The first and second sensors are positioned on a circular path around this axis. To move between the two positions, the rotating frame rotates, and with it, both sensors. One sensor moves from the non-working position to the working position, and the other from the working position to the non-working position. The two sensors thus move along a circular path, which is why the first and second sensors are positioned on a corresponding circular path around the pivot axis. This positioning ensures that the strip being unwound passes through the detection range of each sensor, allowing both longitudinal edges to be detected.A gear drive is preferably provided for moving the rotating frame together with the fixtures, with one or more suitable servo drives that allow the exact determination of the position of the respective fixture along the path of movement, i.e. the exact angular position of the rotating frame and thus of the fixture, so that the recorded sensor information and thus the determined position data can also be assigned to an exact angle and thus an exact position on the circular path.

[0022] Preferably, the two mounts are positioned 180° apart on the rotating frame, meaning they are opposite each other. In this case, the movement to change the position of the mounts is expediently a 180° movement with alternating directions of movement, i.e., a 360° rotation does not occur.

[0023] With such a 180° offset arrangement of the sensors, it is advantageous to position the first and second sensors at 90° angles between the non-working and working positions, offset by 180° from each other. In this configuration, the non-working position is identical for both sensors, as is the working position, except for any necessary correction offset. If the two sensors are now positioned at 90° angles, one relative to one direction of rotation and the other relative to the other, this is advantageous because, in this position, the two longitudinal edges of the roller have the same speed when moving past the sensor. In contrast, if positioned closer to a working or non-working position, they would pass through the detection range of the remaining sensor at different speeds due to deceleration or acceleration.The 90° positioning provided according to the invention therefore facilitates position determination.

[0024] In addition to the device, the invention further relates to a method for operating a device for providing a material tape, in particular a cord tape, comprising: an unwinding device for unwinding a material strip received in the form of a roll, comprising a first and a separate second receiving device for receiving a roll of the material strip each, wherein the first and the second receiving devices are each reversibly movable from a non-working position in which a roll is received or prepared and a working position in which the roll is unwound, a transport device downstream of the unwinding device for receiving the unwound material strip, a device for splicing a rear end of the unwound material strip located on the transport device to a front end of the material strip to be unwound, a position detection device comprising a sensor device for receiving sensor information describing the position of the strip material to be unwound in the first and second receiving points, and a control device for receiving position information based on the sensor information, wherein, depending on the position information, the position of the material strip to be unwound can be aligned relative to the unwound material strip.

[0025] The method according to the invention is characterized in that the sensor device captures the sensor information during the movement of the first and second receivers from the non-working position to the working position, and the control device determines the position information and controls actuating means for moving the first and second receivers transversely to the transport direction of the transport device as a function of the position information, such that the first and second receivers are positioned at the end of the movement into the working position such that the end of the material strip to be unwound is aligned with the end of the unwound material strip.

[0026] Furthermore, it may be provided that a sensor device with at least one first sensor and one second sensor is used, of which the first sensor is arranged in the path of motion of the first recording and the second sensor is arranged in the path of motion of the second recording.

[0027] It is also advantageous to use at least a third sensor, which is assigned to the transport device and by means of which sensor information, the position information that describes the position of the end of the unwound strip material in or on the transport device, is recorded, whereby the control device determines further position information based on the sensor information and controls the actuating means of the first and the second intake depending on the further position information.

[0028] Furthermore, it may be provided that the control device uses the position of one or both longitudinal edges of the material strip to be unwound as position information and / or the position of one or both longitudinal edges of the unwound material strip as further position information, on the basis of which position information the positioning devices are controlled.

[0029] In a further development of the method according to the invention, the control device can determine the center position of the material strip to be unwound as position information based on the position of the longitudinal edges of the material strip to be unwound and / or the center position of the unwound material strip as further position information based on the position of the longitudinal edges of the unwound material strip and control the positioning means in such a way that the center of the strip to be unwound is aligned with the center of the unwound strip.

[0030] In a further embodiment, the invention provides that the leading end of the tape to be unwound is arranged on a preparation bar of the first or the second receiving during the movement, wherein the first and the second sensor detect the sensor information in a plane that lies below the plane in which the preparation bar is moved past them.

[0031] In a design of the unwinding device as a shuttle device, it can be provided that the two receivers are arranged on a common support frame or on separate support frames, which is moved on linear guides in a direction perpendicular to the transport direction of the transport device via the actuating means, wherein the first and the second sensor are arranged offset to both sides of the transport device.

[0032] Finally, in a design of the unwinding device as a rotary frame, it can be provided that the fixtures are arranged on a common rotary frame which is rotatable about an axis of rotation via drive means and movable transversely to the transport direction of the transport device via the actuating means, and which is rotated to move the fixtures, wherein the first and second sensors are arranged on a circular path around the axis of rotation.

[0033] All features described for the device according to the invention also apply equally to the method according to the invention.

[0034] Further advantages and details of the present invention will become apparent from the exemplary embodiments described below and from the drawing. The drawings show: Fig. 1 a schematic representation of a device for providing a material strip, in particular a cord strip, Fig. 2 a schematic representation of a roll of a material strip with a centrally wound strip, Fig. 3 a schematic representation of a roll of a material strip with an off-center wound strip, Fig. 4 a schematic representation of a roll with a material strip to be unwound and the end of an already unwound material strip, wherein both material strips are to be joined together, Fig. 5 a schematic representation of a device according to the invention in the form of a shuttle device with linear movement for moving the holders and changing the material strip rolls, with centrally wound material strips, Fig. 6 a schematic representation accordingly Fig. 5 , however, with off-center wound material strips, Fig. 7 a schematic representation accordingly Fig. 5 , however, with narrower material strips which are to be connected to a wider material strip, Fig. 8 a schematic representation of a device according to the invention in the form of a rotary frame device with rotary movement for moving the fixtures and changing the material strip rolls, with centrally wound material strips, Figs. 9-14 schematic representations to explain the changing and connecting process, Figs. 15-19 schematic representations of the movement of a fixture with an off-center wound material strip into the working position showing the detection of the material strip via the associated sensor as well as correction of the working position, and Figs. 20-22 schematic representations of the movement of both fixtures with centrally wound material strip for exchanging an unwound material strip roll for a new material strip roll.

[0035] Fig. 1 Figure 1 shows a schematic representation of a device 1 according to the invention for providing a tape material, in particular a cord tape. The device 1 comprises an unwinding device 2 for unwinding a material tape 4 received in the form of a roll 3, wherein the unwinding device 2 has separate receptacles, each serving to receive a roll 3. Fig. 1 For clarity, only one image with a roll 3 is shown; the specific setup will be discussed below. In any case, each image, or rather each roll 3, can be used in a Fig. 1 The material strip 4 is brought into the working position shown, in which it can be unwound from the roll 3. The material strip 4 is moved from the roll 3 onto a transport device 5 downstream of the unwinding device 2. This transport device 5 consists of a corresponding roller arrangement over which the material strip 4 is conveyed and unwound. Downstream of the transport device 5 is a material support 6, on which the material strip 4 is transported further to the downstream processing device. The entire device 1 is rotatable about a vertical axis of rotation 7, so that the angle at which the material strip 4 is fed to the downstream processing device can be varied. This processing device could, for example, be a cutting device by means of which corresponding sections are cut from the material strip 4 for subsequent further processing.To enable this angle adjustment, a drive device 8 is provided, by means of which the entire device 1 can be moved along an arc path around the axis of rotation 7, for which purpose the device 1 is movably mounted via suitable bearing means 9.

[0036] Furthermore, a position detection system 10 is provided, comprising a sensor device 11 and a control unit 12, which can also be used to control the entire operation of the operating elements of the device 1, i.e., all actuating means, drive means, etc. The sensor device 12, which has at least two sensors, each of which is arranged in the path of movement of one of the following described fixtures, acquires sensor information. Based on this information, the control unit provides corresponding position information for the belt material 4, which, after a previous roll 3 has been unwound, is fed into the Fig. 1 The control system detects the position of the unit as it is brought to the working position and is to be attached to the end of the unwound belt. Based on this position information, the control unit then activates the corresponding actuators, which move the respective fixture transporting the new roll 3 into the working position. This process is described in more detail below.

[0037] As described, once a new roll 3 has been brought into the working position, the leading end of the new strip material 4 and the trailing end of the previous, unwound strip material 4 are to be joined together, preferably by splicing. For this purpose, a suitable device 13 is provided for joining the two ends, which device 13 is preferably a splicing device. This device comprises a preparation bar and a splice bar, wherein the end of the new material strip 4 to be unwound is arranged on the preparation bar and the end of the unwound material strip 4 is arranged on the splice bar. By moving the splice bar, the two ends are spliced ​​together.

[0038] As described, the position detection device 10, comprising the sensor device 11, serves to acquire sensor information describing the position of the strip material to be unwound, or its end. Based on this sensor information, the control device 12 is able to determine the position of the two longitudinal edges of the new material strip 4 and, if applicable, the center of the new material strip 4, and, based on this, to control the positioning means by which the respective fixture with the new material strip 4 is moved.The sensor information is acquired during the movement of the respective holder and thus of the new material belt 4 from the non-working positions to the working position, as well as the determination of the position data and, based on this, the control parameters, via which the positioning means of the holder drive are controlled, so that the new material belt is exactly aligned with the end of the unwound material belt 4 when it enters the working position and no subsequent correction is necessary.

[0039] Appropriate position detection and longitudinal edge determination may be necessary, since, as the Fig. 2 und 3 This shows that the respective rolls do not necessarily have to be wound identically. Fig. 2 A first roll 3 encompassing a spool core 14, onto which the material strip 4 is wound centrally, is shown. In contrast, it shows Fig. 3 a roller 3 with a spool core 14, onto which the material strip 4 is wound off-center. How Fig. 4 However, as shown, the two material strips 4, i.e., the new material strip 4 to be unwound and the outgoing, unwound material strip 4, must be aligned exactly with each other, either with respect to their respective longitudinal edges or their respective centers. The material strip to be unwound is in Fig. 4 The material strip to be unwound is designated with reference numeral 4a, the unwound material strip with reference numeral 4b. The material strip 4a to be unwound has two longitudinal edges 15a, 16a and a center point 17a, while the unwound material strip 4b has two longitudinal edges 15b, 16b and a center point 17b. In the example shown, both material strips 4a, 4b are of the same width; ideally, the longitudinal edges 15a, 15b and 16a, 16b, as well as the two centers 17a, 17b, are aligned. In the example, the material strip 4a is wound centrally onto the spool core 14a. It is therefore a roll 3 according to Fig. 2 provided for. However, a role 3 would be according to Fig. 3 As intended, with the same positioning of the holder and thus of the roller 3, the longitudinal edge 15a would be positioned laterally offset on the spool core 14 and thus, with the same positioning of the holder and thus of the roller 3 in the working position, would be offset perpendicular to the transport direction T relative to the longitudinal edge 15b. The same applies, of course, to the longitudinal edges 16a, 16b and the centers 17a, 17b. This transverse offset must be compensated for, for which purpose the position detection of the material strip 4a or the longitudinal edges 15a, 16a serves. Based on this position detection, the holder is moved directly during its movement from the non-working positions to the working position into the exact position aligned with the end of the unwound material strip 4b.

[0040] It can happen that the material strip 4 becomes misaligned during the unwinding process, i.e., after the beginning of the material strip has been spliced. This occurs because the material strip 4 was wound crooked onto the spool core 14 (coming from the calender) in a previous process, or because the operator attached the beginning of the material strip to the preparation bar at an angle. Consequently, the material strip 4 is also fed slightly crookedly towards the unwinding device 2 during unwinding. To compensate for this in the subsequent process, it is advantageous to align the roller 3 with the center of the unwinding device 2. This means that the center 17a of the material strip 4 is not aligned with the center 17b of the unwound material strip 4b, but rather with the center of the unwinding device 2. Although the centers 17a and 17b will then have a slight offset from each other, this will be compensated for in the subsequent process.The control unit 12 allows these additional offset options in positioning to be taken into account when changing from a non-working position to a working position.

[0041] Fig. 5 Figure 1 shows a schematic representation of a device according to the invention for illustrating a roll change. A first receptacle 18 is shown, on which a first roll 3a with a material strip 4a is wound. This first receptacle 18 is shown in two positions: a non-working position, shown with dashed lines, and a working position, shown with solid lines, in which it is adjacent to the trailing end 19 of the already wound roll. Fig. 4 The described material strip 4b is located. The double arrow P1 indicates this reversible linear displacement movement. Also shown is a second receptacle 20, on which another roller 3c with another material strip 4c is mounted. This second receptacle 20 is in a non-working position, which can also be called a preparation position, in which a roller 3c, to be brought into the working position at a later time, is mounted and pre-positioned such that its free end, which is to be spliced ​​to the end 19 of the material strip 4b via the connecting device 13, is in a defined position, i.e., arranged as described on the preparation strip associated with the receptacle 20.

[0042] The two mounts 18, 20 are arranged on a common support frame 21, shown here only as a dashed line. This frame can be linearly displaced along suitable linear guides and perpendicular to the transport direction T by means of appropriate actuating devices 22, such as a spindle drive controlled by a servo motor. The actuating devices 22 are controlled by the control units 12, which are part of the position detection unit 10, which also includes the two sensors 23, 24 shown here.

[0043] The two sensors 23, 24 are located laterally adjacent to the transport device 5, on which the material belt 4 lies. The respective detection area 25, 26, as indicated by the respective arrow, is directed towards the receptacles 18, 20. The arrangement is such that a roller or the respective belt material to be moved from the respective non-working position to the working position is moved through the detection area 25, 26 of the respective sensor 23, 24, so that the sensor 23 detects the two longitudinal edges 15a, 16a of the roller 3a in the example shown. Fig. 5 Sensor 24 can detect the two longitudinal edges 15c, 16c of the other roller 3c located in the second fixture 20 as it moves into the working position. The position of sensors 23, 24 is such that the sensor information is acquired and completed during the movement of the respective fixture and thus of the respective roller 3a, 3c, before the working position is reached.The sensor information is evaluated by the control units 12, and the corresponding positions of the longitudinal edges and the center of the strip are determined. Based on this, corresponding control parameters for the positioning devices 22 are determined. These devices are then controlled in such a way that the ongoing movement of the respective holder 18, 20 is controlled to precisely reach the determined working position in which the leading end 27 of the new material strip 4a to be unwound is aligned with the fixed, trailing end 19 of the unwound material strip 4b. The respective holder 18, 20 therefore stops only once in precisely the determined, aligned working position; no further correction of the position is necessary, as the strip is already perfectly aligned.

[0044] Fig. 5 Figure 5 further shows the optional possibility of a third sensor 28 being assigned to the transport device 5. This sensor detects the longitudinal edges 15b, 16b of the material belt 4b and thus the exact position of the end 19 of the material belt 4b. This sensor information is also given to the control device 12, which determines the corresponding position information for the longitudinal edges 15b, 16b and the center 17b, respectively. This ultimately determines the actual position of the end 19, with respect to which the end 27 of the material belt 4a or 4c is to be aligned. This actual position of the end 19 therefore represents the target position with respect to which the movement of the respective holder 18, 20, and thus of the respective roller 3a, 3c, is to be aligned.

[0045] The measurement of roller 3c is carried out in the same manner when it is to be moved into the working position, which is the case when the material strip 4a is fully unwound. In this case, the support frame 21 moves in the opposite direction, the fixture 18 is moved from the working position to the non-working position, while the fixture 20 is moved from the non-working position to the working position. During this process, both longitudinal edges 15c, 16c pass through the detection range 26 of the sensor 24, so that corresponding edge-related sensor information is again acquired. This information is then used by the control devices 12 to determine the position information for the longitudinal edges 15c, 16c and the center 17c, and the corresponding control parameters for the positioning devices 22 are determined, so that roller 3c is also moved precisely into the aligned working position.The respective ends can then be connected via the connection device 13 shown.

[0046] Fig. 5 The device 1 shows the process with material strips 4a and 4c wound centrally on the spools. Fig. 6 In contrast, the device according to the invention 1 shows the material strip 4a wound off-center onto the spool core 14; the same applies, by way of example, to the material strip 4c. Again, it is assumed that the first fixture 18, from the non-working position (shown with dashed lines), is moved with the roller 3a and the material strip 4a into the working position (shown with solid lines), as indicated by arrow P1. As it passes through the detection area 25 of the sensor 23, the two longitudinal edges 15a and 16a are detected, and the control devices 12 determine the corresponding position information. Similarly, position information can be determined simultaneously based on the sensor information from the third sensor 28.In order to align the longitudinal edges 15a, 16a with the longitudinal edges 15b, 16b of the material strip 4b, as well as the two centers 17a, 17b, the mounting 18 must necessarily be positioned somewhat differently than in the initial example according to . Fig. 5 Because of the off-center winding and the resulting transverse offset 30 relative to a central winding, the resulting transverse offset 29 is, as in Fig. 6 shown, which, when positioned in the same position as to Fig 5 The described situation would need to be compensated for. That is, the recording 18 must move to a slightly different working position than in the example according to... Fig. 5 . In this work position according to Fig. 5 staggered work position according to Fig. 6 However, the longitudinal edges 15a, 16a are aligned with the longitudinal edges 15b, 16b, as are the centers 17a, 17b, since the two material bands 4a, 4b are of the same width here.

[0047] The same procedure is followed when the second recording 20 is to be brought into the working position; its material strip 4c is also wound off-center, so that here too, compared to the working position according to Fig. 5 , a slightly different working position must be adopted.

[0048] Fig. 7 Figure 1 shows an embodiment of a device 1 according to the invention, the structure of which is identical to the devices 1 described above. In contrast to the embodiment according to Figure 1, the device 1 is structured differently. Fig. 5 Here, the two material strips 4a and 4c are significantly narrower than the already unwound material strip 4b. In the example shown, no center alignment is to be performed, but rather an alignment with respect to a longitudinal edge, here longitudinal edge 16a to longitudinal edge 16b. The first fixture 18 with the first roll 3a and the material strip 4a is again moved from the non-working position shown by the dashed line, according to arrow P1. In doing so, the material strip 4a is moved through the detection area 25 of the sensor 23, which again detects the two longitudinal edges 15a and 16a. Likewise, the optional third sensor 28 detects the longitudinal edges 15b and 16b. The control device 12 now determines the position information of the longitudinal edges 15a, 16a, 15b, 16b and thus the control parameters by which the actuating means 22 are to be controlled to move the support frame 21 so that the two longitudinal edges 16a, 16b are aligned with each other.

[0049] How Fig. 7 Furthermore, the two material strips 4a, 4c are also wound off-center on the coil core 14, as shown by the transverse offset 30. This transverse offset 30 is also compensated for, so that the resulting transverse offset 29 is determined and set via the corresponding control parameters, and as a result, despite the narrower material strip 4a and the off-center winding, a working position is reached in which the two longitudinal edges 16a, 16b are aligned.

[0050] Fig. 8 Figure 1 shows an embodiment of a device 1 according to the invention, in which the two receptacles 18, 20 are mounted on a rotatable about an axis of rotation 31, in Fig. 8 The components are arranged in rotating frames (not shown in detail). The two mounts 18 and 20 are shown again, each holding a roll of material strip 4a and 4c, respectively. Mount 18 is in the working position, meaning that the end 27 is to be spliced ​​with the end 19 of the unwound material strip 4b, or has already been spliced. Mount 20, with the material strip 4c, is in the non-working or preparation position. To exchange the two fixtures 18, 20, i.e., to move the first fixture 18 from the working position to the non-working position to receive a new roll and simultaneously move the second fixture 20 with the new material strip to be unwound into the working position, the entire unwinding device 2 rotates about the axis of rotation 31, as shown by the double arrow P2. The fixtures 18, 20 and thus the material strips 4a, 4c consequently move on an indicated circular path 32.

[0051] The two sensors 23, 24 with their respective detection ranges 25, 26 are also shown here. These sensors are arranged adjacent to the circular path 32 such that the respective longitudinal edges 15a, 16a move through the detection range 25 of the first sensor 23, while the longitudinal edges 15c, 16c move through the detection range 26 of the second sensor 24. The corresponding sensor information describing the edge position is again acquired and evaluated by the control units 12. The control units then adjust the corresponding control parameters for activating a drive element 33, which rotates the rotating frame (not shown). The drive element 33 is, for example, a servo motor that drives a gear which meshes with a toothed ring or toothed segment of the support frame.The movement of the rotating frame is a changing movement by 180°, so that each shot 18, 20 is moved past the respective assigned sensor 23, 24.

[0052] A corresponding transport device 5 is also provided here, on which the unwound material strip 4b rests, as well as an optionally provided third sensor 28. Also shown is the connection device 13, i.e. the splicing device, which serves to connect the corresponding ends 27 of the material strip 4a and 19 of the material strip 4b.

[0053] The Fig. 9-14 They exemplify the process of a role reversal. Fig. 9 The first image 18 shows the situation in which the roll is completely unwound, with the end 19 of the material strip 4b hanging freely. The second image 20 shows a new roll 3c with the material strip 4c, the end 27 of which is already fixed to a preparation strip 34. The rotary frame 35 is shown here, which can be rotated about the vertical axis 31 via the drive means 33 and can be moved linearly and transversely to the transport direction T via positioning means 39, e.g., a spindle drive with a driving servo motor.

[0054] If the material belt 4c is to be provided, the rotating frame 35 is turned, which causes both fixtures 18 and 20 to move around the axis of rotation 31 along the circular path 32. During this movement, the material belt 4c passes through the detection range of the sensor 24, which in turn records the sensor information. Based on this information, the control devices 12 determine the exact working position into which the second fixture 20 is to be placed and control the movement of the rotating frame accordingly. This working position is in Fig. 10 The figure shows the second intake 20, and thus the material strip 4c, in the working position. The end 27 is clearly positioned adjacent to the end 19, so that the connecting device 13 can splice the two ends. A movable splice strip 36 is shown, which is moved against the stationary preparation strip 34, as shown. Fig. 11 and the arrow P3 there indicates. The two material strips 4c and 4b are now firmly connected, so that after opening the connection device 13, i.e. retracting the splice strip 36 (see Figur 12 , arrow P4) and the associated release of the material belt 4c during continued transport operation via the transport device 5 and its take-off rollers, the belt material 4c is unwound.

[0055] The Fig. 10 - 12 Furthermore, they show that the first recording (18) is in a non-working position; a new role has not yet been recorded. This will be according to Fig. 13 in the form of the roll 3a with the material strip 4a, and received in the second receptacle 18. After receiving the roll 3a, the preparation strip 34, which is arranged on a swivel bracket 37, is pivoted as shown by arrow P5 and inserted into the Fig. 14 The position shown is brought into which it is assigned to the first intake 18. In this position, the free, leading edge of the new material strip 4a can then be attached to the preparation strip 34, thus completing the preparation. Once the material strip 4c has been unwound, a new cycle begins and the rotating frame 35 rotates again until the first intake 18 is back in the working position, naturally accompanied by corresponding position detection and control of the adjusting device 39 of the rotating frame for any necessary immediate offset compensation.

[0056] The Fig. 15 - 22 They show a role change process. It is assumed that in Fig. 15 The second recording 20, with a roller 3c carrying a strip material 4c, is moved from the non-working position to the working position. For clarity, the first recording is not shown. As the figure shows, the strip material 4c is wound off-center on the spool core 14, meaning that there is a transverse offset 30. As the movement progresses in the direction of arrow P6, one longitudinal edge 15c of the strip end, which is located on the preparation strip 34 (not shown in detail), enters the detection area 26 of the sensor 24, thus establishing a first measuring point. The detection of the longitudinal edge 15c, i.e., the first measuring point, occurs at a specific rotational position of the rotating frame 35, which can be detected by the actuating device 33, e.g., the servo motor, so that the detection of the longitudinal edge 15c can be assigned to a specific frame position along the rotation path.

[0057] As the movement progresses, the second longitudinal edge 16c of the end fixed to the preparation strip 34 moves into the detection range 26 of the sensor 24, thus creating a second measuring point, which in turn corresponds to a specific angular position of the rotating frame 35. Consequently, there are corresponding measuring points correlated to each rotating frame position, with the measuring points representing the specific given lateral offset 30, since, relative to a central arrangement of the material strip 4b, they are detected at a slightly earlier point in time, i.e., at slightly different angular positions of the rotating frame. Conversely, this would be the case if the lateral offset 30 were in the other direction. Based on the respective detected rotating frame positions, the control device 12 can determine precisely when the rotational movement is to be stopped, which occurs when the two longitudinal edges or longitudinal centers, which are to be aligned with each other, are parallel to one another.The lateral offset compensation is achieved by laterally moving the rotating frame 35 during the correction movement described below.

[0058] In any case, the control device 12 now determines the corresponding transverse offset 30, after the sensor information for both longitudinal edges is available, whereupon, see Fig. 17 The entire rotating frame 35, including both mounts 18 and 20, is linearly displaced, as indicated by arrow P7, meaning that a correction movement begins. This correction movement is visible from the center line 38, which runs parallel to the transport direction T and passes through the axis of rotation 31, as well as the center 17b of the unwound material belt 4b. At the beginning of the correction movement, see Fig. 17 Since the center line 38 still runs below the line of the center 17b, the center line 38 is shifted by the increasing linear movement of the rotating frame 35 and thus of the recording 20, as already Fig. 18 shows until the in Fig. 19 The working position shown is reached, in which the determined lateral offset 30 is exactly compensated and the longitudinal edges 15c, 16c are aligned with the longitudinal edges 15b, 16b. Of course, any detection of the position of the longitudinal edges 15b, 16b via the third sensor 28 can also be taken into account during the correction run.

[0059] Is, as in the example after Fig. 20 As shown, once the tape material 4c has been unwound, the first intake 18, shown here additionally, in which a new tape material 4a is taken up, the end 27 of which is already fixed to the preparation strip 34 (not shown in detail), is to be brought into the working position. Fig. 21 und 22 The relevant movement is shown. A pivoting movement begins, as indicated by arrow P8, but in the opposite direction compared to arrow P6. At a specific point in time, the longitudinal edge 15a passes through the detection area 25 of the first sensor 23, and this measurement point is associated with a corresponding specific position of the rotating frame. The material strip 4a is evidently wound in the middle, so that, relatively speaking, the detection point of the longitudinal edge 15a occurs somewhat later and at a different, more advanced position of the rotating frame 35, compared to the detection of the longitudinal edge 15c according to [reference missing]. Fig. 15 and the off-center wound material strip 4c. With continued movement, the second longitudinal edge 16a also enters the detection range 25 of the sensor 23, and a specific rotating frame position is assigned to this detection point as well. The control unit is now able, on the one hand, to determine precisely the final rotating frame position in which the longitudinal edges of the material strip 4a and the material strip 4b, or rather the centers of the strips, are parallel to each other, and on the other hand, to determine any offset that results in the entire rotating frame 35, and with it both mounts 18, 20, having to be moved to compensate for the lateral offset, with the corresponding lateral movement in Fig. 22as already indicated by arrow P9. The control device 12 determines the corresponding control parameters and controls, on the one hand, the drive means 33, so that the rotary frame 35 is rotated accordingly, and on the other hand, the actuating means 39, by means of which the rotary frame 35 is moved laterally to correct the lateral offset.

Claims

1. Device for supplying a material strip, in particular a cord strip, comprising: - a discharging device (2) for discharging a material strip (4, 4a, 4b) received in the form of a roll (3, 3a, 3c), comprising a first and a separate second receiving device (18, 20) for receiving one roll (3, 3a, 3c) of the material strip (4, 4a, 4c) each, wherein the first and the second receiving device (18, 20) are each reversibly movable from a non-working position in which a roll (3, 3a, 3c) is received or prepared, and a working position in which the roll (3, 3a, 3c) is discharging, - a transport device (5) downstream of the discharging device (2) for receiving the discharging material strip (4, 4a, 4b, 4c), - a device (13) for joining a rear end (19) of the unwound material strip (4b) located on the transport device (5) to a front end (27) of the material strip (4a, 4c) to be unwound,- a position detection device (10) comprising a sensor device (11) for acquiring sensor information describing the position of the strip material to be unwound (4, 4a, 4c) in the first and second receptacles (18, 20), and a control device (12) for acquiring position information based on the sensor information, wherein, depending on the position information, the position of the material strip to be unwound (4, 4a, 4c) relative to the unwound material strip (4b) can be aligned, , characterized by the fact thatby means of the sensor device (11) the sensor information can be acquired during the movement of the first and second holders (18, 20) from the non-working position to the working position and the control device (12) for determining the position information and for controlling actuating means (22, 39) for moving the first and second holders (18, 20) transversely to the transport direction (T) of the transport device (5) depending on the position information is set up such that the first and second holders (18, 20) are positioned at the end of the movement into the working position such that the end (27) of the material strip to be unwound (4, 4a, 4c) is aligned with the end (19) of the unwound material strip (4b).

2. Device according to claim 1, characterized by the fact thatthe sensor device (11) comprises at least a first sensor (23) and a second sensor (24), of which the first sensor (23) is arranged in the path of movement of the first recording (18) and the second sensor (24) is arranged in the path of movement of the second recording (20).

3. Device according to claim 2, characterized by the fact that the detection device (10) comprises at least one third sensor (28) which is assigned to the transport device (5) and by means of which sensor information is detected, the position information which describes the position of the end (19) of the unwound strip material (4b) in or on the transport device (5), wherein the control device (12) is set up to determine further position information on the basis of the sensor information and to control the actuating means (22, 39) of the first and the second receiving (18, 20) depending on the further position information.

4. Device according to claim 3, characterized by the fact thatthe third sensor (28) is a sensor that detects the entire width of the unwound material strip (4b).

5. Establishment according to one of the preceding claims, characterized by the fact that by means of the control device (12) the position of one or both longitudinal edges (15a, 16a, 15c, 16c) of the material strip to be unwound (4a, 4c) and / or as further position information the position of one or both longitudinal edges (15b, 16b) of the unwound material strip (4b) can be determined, based on which position information the actuating means (22, 39) can be controlled.

6. Device according to claim 5, characterized by the fact thatthe control device (12) is set up to determine the center position of the material strip to be unwound (4a, 4c) as position information based on the position of the longitudinal edges (15a, 16a, 15c, 16c) of the material strip to be unwound (4a, 4c) and / or the center position of the unwound material strip (4b) as further position information based on the position of the longitudinal edges (15b, 16b) of the unwound material strip (4b) and to control the positioning means (22, 39) such that the center of the material strip to be unwound (4a, 4c) is aligned with the center of the unwound material strip (4b).

7. Establishment according to one of the preceding claims, characterized by the fact thatthe leading end (27) of the material strip (4a, 4c) to be unwound is arranged during the movement on a preparation bar (34) of the first or the second receiving (18, 20), wherein the first and the second sensor (23, 25) are positioned below the plane in which the preparation bar (34) is moved past them.

8. Establishment according to one of the preceding claims, characterized by the fact that the two receivers (18, 20) are arranged on a common support frame (21) or on separate support frames, which are movable on linear guides in a direction perpendicular to the transport direction (T) of the transport device (5) via the actuating means (22), wherein the first and the second sensor (23, 25) are arranged offset to both sides of the transport device (5).

9. Device according to any one of claims 1 to 7, characterized by the fact thatthe recordings (18, 20) are arranged on a common rotating frame (35) which is rotatable about an axis of rotation (31) via drive means (33) and perpendicular to the transport direction (T) of the transport device (5) via actuating means (39), wherein the first and the second sensor (23, 24) are arranged on a circular path around the axis of rotation (31).

10. Device according to claim 9, characterized by the fact that the two recordings (18, 20) are arranged 180° apart from each other on the rotating frame (35).

11. Device according to claim 10, characterized by the fact that the first and second sensors (23, 24) are arranged at 90° positions between the non-working position and the working position, offset by 180° from each other.

12. Method for operating a device for providing a material strip, in particular a cord strip, comprising: - a disentanglement device (2) for disentangling a material strip (4, 4a, 4b) received in the form of a roll (3, 3a, 3c), comprising a first and a separate second receiving device (18, 20) for receiving a roll (3, 3a, 3c) of the material strip each, wherein the first and the second receiving device (18, 20) are each reversibly movable from a non-working position in which a roll (3, 3a, 3c) is received or prepared, and a working position in which the roll (3, 3a, 3c) is disentangled, - a transport device (5) downstream of the disentanglement device (2) for receiving the disentangled material strip (4b), - a device for splicing a rear end (19) of the disentangled material strip located on the transport device (5). (4b) to a front end (27) of the material strip to be unwound (4a, 4c),- a position detection device (10) comprising a sensor device (11) for acquiring sensor information describing the position of the strip material to be unwound (4a, 4c) in the first and second recordings (18, 20), and a control device (12) for acquiring position information based on the sensor information, wherein, depending on the position information, the position of the material strip to be unwound (4a, 4c) relative to the unwound material strip (4b) can be aligned, , characterized by the fact thatby means of the sensor device (11) the sensor information is acquired during the movement of the first and second holders (18, 20) from the non-working position to the working position and the control device (12) determines the position information in such a way and controls actuating means for moving the first and second holders (18, 20) transversely to the transport direction of the transport device (5) depending on the position information in such a way that the first and second holders are positioned at the end of the movement into the working position such that the end of the material strip to be unwound (4a, 4c) is aligned with the end (19) of the unwound material strip (4b).

13. Method according to claim 12, characterized by the fact thata sensor device (11) with at least one first sensor (23) and one second sensor (24) is used, of which the first sensor (23) is arranged in the movement path of the first recording (18) and the second sensor (24) is arranged in the movement path of the second recording (20).

14. Method according to claim 13, characterized by the fact that at least one third sensor (28) is used, which is assigned to the transport device (5) and by means of which sensor information, the position information describing the position of the end (19) of the unwound or cut strip material (4b) in or on the transport device (5), is recorded, wherein the control device (12) determines further position information on the basis of the sensor information and controls the actuating means (22, 39) of the first and the second receiving (18, 20) depending on the further position information.

15. Method according to any one of claims 12 to 14, characterized by the fact thatThe control device (12) determines the position of one or both longitudinal edges (15a, 16a, 15c, 16c) of the material strip to be unwound (4a, 4c) and / or the position of one or both longitudinal edges (15b, 16b) of the unwound material strip (4b) as further position information, based on which position information the actuating means (22, 39) are controlled.

16. Method according to claim 15, characterized by the fact thatthe control device (12) determines the center position of the material strip to be unwound (4a, 4b, 4c) as position information based on the position of the longitudinal edges (15a, 16a, 15c, 16c) of the material strip to be unwound and / or the center position of the unwound material strip (4a, 4c) as further position information based on the position of the longitudinal edges (15b, 16b) of the unwound material strip (4b) and controls the positioning means (22, 39) such that the center of the strip to be unwound (4a, 4c) is aligned with the center of the unwound strip (4b).

17. Method according to any one of claims 12 to 16, characterized by the fact that the leading end (27) of the tape to be unwound (4a, 4c) is arranged during the movement on a preparation bar (34) of the first or the second intake (18, 20), wherein the first and the second sensor (23, 25) detect the sensor information in a plane which is below the plane in which the preparation bar (34) is moved past them.

18. Method according to any one of claims 12 to 17, characterized by the fact that the two receivers (18, 20) are arranged on a common support frame (21) or on separate support frames, which is moved on linear guides in a direction perpendicular to the transport direction (T) of the transport device (5) via the actuating means (39), wherein the first and the second sensor (23, 24) are arranged offset to both sides of the transport device (5).

19. Method according to any one of claims 12 to 17, characterized by the fact that The receptacles (18, 20) are arranged on a common rotating frame (35) which is rotatable about an axis of rotation (31) via drive means (33) and movable transversely to the transport direction (T) of the transport device (5), and which is rotated to move the receptacles (18, 20), wherein the first and the second sensor (23, 24) are arranged on a circular path about the axis of rotation (31).

Images