MATERIAL TRACK ROLL-OFF ARRANGEMENT

Description

[0001] The invention relates to a material web unwinding arrangement for unwinding a material web, such as a paper web, cardboard web, or the like, for example, to form a corrugated board web, such as a corrugated board web laminated on one or both sides. Furthermore, the invention relates to a system, for example, a corrugated board system, with at least one such material web unwinding arrangement. The invention also relates to a corresponding method.

[0002] It is known from prior art, through obvious use, to install safety light curtains on material web unwinding systems to protect people from accidents. These safety light curtains operate without contact and create a field of beams to secure the danger zone around the respective material web unwinding system. An interruption of one or more beam paths triggers a command, such as switching off the entire material web unwinding system or a part thereof. A disadvantage is that accidents still occur despite the safety light curtains. False triggers also occasionally occur, which frequently disrupts production.

[0003] DE 10 2020 119 565 A1 relates to a method for monitoring an access leading into a safety area of ​​a roll unwinder or rewinder, through which material rolls can be transported in and / or out, wherein the access is formed by an opening provided between two elements mechanically limiting the safety area, and wherein the access is monitored by a monitoring sensor system.

[0004] US Patent 2003 / 0071162 A1 discloses a roll changer for a web processing or handling machine, preferably for a web rotary printing press, the roll changer comprising: a) a first roll arm pivotable about a pivot axis and a pivotable second roll arm, b) a first wiper movable relative to the first pivot pin, c) a drive device for pivoting the roll arms and moving the first wiper, d) a control device which controls the drive device for manual removal of the web roll such that the web roll supported on the pivot pin is wiped off the first pivot pin by means of the first wiper, while remaining on the second pivot pin.

[0005] WO 2020 / 074564 A1 describes a processing line for web materials. This line includes a detection system for recording the presence of people near the processing section. The detection system comprises at least one primary presence sensor and is designed to detect the presence of people in at least one controlled area. The controlled area is divided into an accessible area, which can be entered while the system is running, and an alarm area. The detection system is designed to distinguish between the presence of a person in the accessible area and the presence of a person in the alarm area.

[0006] German patent DE 29602098 U1 discloses a sensor system comprising at least one sensor. From a multitude of signals generated by the sensor, an actual image of the environment of the reel changer is obtained. The sensor reacts to acoustic or electromagnetic waves and is, in particular, an optical sensor.

[0007] The invention aims to overcome the disadvantages of the prior art. In particular, it seeks to create a material web unwinding arrangement that offers a particularly high and reliable level of protection. False triggering should be avoided. Furthermore, a corresponding system with at least one such material web unwinding arrangement and a corresponding method are to be supplied.

[0008] This problem is solved according to the invention by the features specified in main claims 1, 11 and 13. The core of the invention lies in a first area safety device that is capable of securing a (danger) area or region that extends adjacent to the material web unwinding arrangement or first unwinding device.

[0009] The first area safety device preferably operates without contact and is reliably capable of protecting persons from injuries or accidents, such as those that can occur during the operation of the first unwinding device. In operation, it preferably forms a protective field, particularly a dense one, consisting of beams, especially laser beams, which, for example, has a (maximum) extent of between 2 m and 5 m from the respective first safety device. The first area safety device is preferably capable of detecting or recognizing an unauthorized or authorized roll of material, an unauthorized or authorized transport device, a person, and / or another unauthorized or authorized object. Due to the first area safety device, intervention by an operator during the operation of the material unwinding arrangement is unnecessary. Preferably, it is capable of meeting a performance level d.

[0010] It is advantageous if the at least one first safety device is designed as a scanner, in particular a laser scanner. Preferably, between two and four first safety devices are present. These are preferably arranged at intervals from one another. It is expedient if the first safety devices are structurally identical. They can also be structurally different or have different performance levels.

[0011] The frame is rigid and preferably includes a base, stand, and support. It is preferably attached to a floor or substrate.

[0012] It is advantageous if the first unwinding device includes a first braking unit capable of applying a first braking force to the first roll of material as it unwinds.

[0013] The first receiving device is, for example, axially displaceable and / or tiltable. It preferably comprises at least one retaining boss capable of axially engaging the first web roll or its central support sleeve. The first web roll is thus mounted and then preferably extends horizontally. It is held at a distance from the base. Advantageously, the first receiving device has two opposing retaining mandrels that, in operation, engage the web roll or its support sleeve at opposite ends.

[0014] The first displacement device comprises, for example, at least one first displacement drive. It is advantageous if it is capable of vertically displacing, and in particular pivoting, the first receiving device between the unwinding position and the material web roll change position. The at least one first displacement drive is, for example, designed as a hydraulic, pneumatic, or electric drive. It is preferably variable in length and preferably designed as a piston-cylinder unit. The first receiving device and displacement device are preferably in direct or indirect communication with each other.

[0015] The unwind position of the first receiving device is preferably located above the material web reel change position of the first receiving device. In the unwind position of the first receiving device, the first material web is unwound during operation of the material web unwinding arrangement. In the material web reel change position, the first receiving device is able to receive a new first material web reel or to release an old one, such as one that is already at least partially used.

[0016] It is advantageous if at least one sensor, such as an angle sensor, camera, or similar device, detects the unwind position and / or material web change position, or the respective position of the first transfer device or first receiving device. Ideally, corresponding position signals are transmitted directly or indirectly to a safety processing unit.

[0017] Preferably, the material web unwinding arrangement is capable of operating automatically, semi-automatically or fully automatically, in particular of receiving and / or discharging a first roll of material web.

[0018] In this context, a material web roll is understood to be a roll that is new / full and thus carries the finite material web, or is empty and thus does not carry any material web (anymore), or carries an intermediate amount of material web, such as a remnant thereof.

[0019] The transport system is designed, for example, as a floor-mounted, underfloor, or above-floor transport system. Material web rolls are preferably transported to and / or transferred to the material web unwinding system automatically or driverlessly. They are preferably also transported away from and / or picked up from the material web unwinding system automatically or driverlessly. The transport system preferably has at least one drive. It is advantageous if the transport system includes at least one of its own safety devices, such as a camera, scanner, or the like, particularly if it is capable of operating or transporting autonomously and is designed as a transport cart. The transport system's at least one safety device, if present, is, for example, capable of immediately stopping the transport system upon detection of a hazard.

[0020] The transport device is, for example, a material handling vehicle such as a transport cart, preferably capable of autonomously or automatically transporting rolls of material. It preferably has a running unit, such as a wheel unit, track unit, or the like, for support against a surface or floor. The transport device advantageously includes its own energy storage unit and is capable of receiving operating signals during operation. It is preferably capable of communicating with the safety processing unit, directly or indirectly. Any safety device(s) of the transport device, if present, is / are, for example, facing forward, laterally, and / or to the rear.

[0021] Alternatively, the transport device can be designed, for example, as an (endless) conveyor transport device, such as a conveyor chain transport device, for transporting the material web rolls or a rail transport device for transporting the material web rolls on rails.

[0022] It is advantageous if the material web unwinding arrangement is symmetrical with respect to a plane of symmetry.

[0023] Further advantageous embodiments of the invention are specified in the dependent claims.

[0024] The safety fields generated by the first safety device according to dependent claim 2 are imaginary and invisible. It is advantageous if the safety fields are present simultaneously. It is expedient if the safety fields extend away from the material web unwinding arrangement and / or extend at least partially along it, as well as at least partially along the first unwinding device. The safety fields can have the same shapes and / or sizes during operation. Irregularities, such as unauthorized entry into the danger zone by, for example, an operator, a roll of material web, a transport device, and / or another object, can be detected by the safety fields. The safety fields are preferably freely configurable.

[0025] The material web unwinding device according to dependent claim 3 is particularly reliable and resistant to malfunctions. The safety fields offer a particularly large detection and sensing range. They preferably extend horizontally.

[0026] The embodiment according to dependent claim 4 is also particularly reliable and resistant to malfunctions. It is advantageous if the safety fields overlap in certain areas adjacent to the first safety device that generates them. Ideally, the safety fields also have non-overlapping areas.

[0027] The safety fields according to dependent claim 5, for example, have a (substantially) rectangular, trapezoidal, triangular, and / or sector-shaped, as well as semicircular or semicircular, form during operation. Combinations are possible. Advantageously, the shapes and / or sizes of the safety fields remain constant during operation. The shapes and / or sizes depend, for example, on spatial conditions and / or transport paths of the material web rollers or at least one transport device.

[0028] The material web unwinding arrangement according to dependent claim 6 is also particularly reliable and resistant to malfunctions. For example, the safety fields extend from the respective first safety device in opposite directions, obliquely or perpendicularly to each other. It is advantageous if at least one safety field extends along the first receiving device and / or perpendicular to it.

[0029] According to dependent claim 7, monitoring of the interruption(s) of the safety fields, particularly their temporal or logical sequence, is preferably carried out. Advantageously, the first area safety device or safety processing unit detects an interruption of the safety fields that occurs during the proper transport, removal, picking up, and / or dispensing of the first roll of material. An irregularity is therefore detectable if there is a deviation from this, for example, if a person or object in the danger zone interrupts the safety fields in a sequence other than the predetermined or fixed (temporal) sequence.

[0030] The embodiment according to dependent claim 8 leads to a material web unwinding arrangement that is extremely reliable and simple. The at least one first safety device is stationary or immovable. The first safety device and the first receiving device or first transfer device are movable relative to each other.

[0031] The embodiment according to subclaim 9 allows, for example, the safe detection or recording of persons and / or rolls of material being transported to or from the site.

[0032] In the embodiment according to dependent claim 10, reliable and trouble-free detection of persons and / or material web rolls is again possible. The at least one first safety device is, for example, arranged directly below the first transfer device on the frame or (laterally) offset below the first transfer device on the frame.

[0033] It is advantageous if the material web unwinding arrangement includes a second unwinding device for unwinding a finite second material web from a second material web roll. The second unwinding device is preferably designed like the first unwinding device. Advantageously, the finite second material web is designed like the finite first material web. The material web unwinding arrangement is preferably designed as a material web splicing arrangement capable of producing or unwinding an endless material web, particularly for corrugated board production, from the finite first and second material webs. Advantageously, a second area safety device is also provided, designed like the first area safety device and operating analogously. The safety fields of the first and second area safety devices are preferably spaced apart from each other during operation. For example, they are symmetrical to each other.

[0034] The safety processing unit according to dependent claim 12 is preferably of an electrical or electronic type. It is, for example, a component of the material web unwinding arrangement or a safety processing unit superior to it. Area signals are signals that characterize the secured area. They are electrical in nature and constitute safety signals.

[0035] The safety processing unit is capable, for example, of stopping or slowing down hazardous movements during production in a dangerous situation. It is capable, for example, of stopping or slowing down at least one transport device in a dangerous situation to prevent an accident, such as one involving personal injury. Alternatively or additionally, it is capable, for example, of completely stopping or slowing down the first unwinding device in a detected dangerous situation, or alternatively, of stopping or slowing down at least one individual function of the device, such as unwinding, raising, and / or lowering the first roll of material, in order to prevent an accident. For example, an additional visual or audible warning signal can be emitted.

[0036] The signal processing unit is capable of receiving and processing signals such as area signals or safety signals. It is also preferably capable of outputting signals such as operating signals or fault signals.

[0037] The statements relating to dependent claim 12 apply essentially analogously to dependent claim 14.

[0038] According to dependent claim 15, a sequence of interruptions of the safety fields, particularly a temporal or logical sequence, is preferably monitored. Advantageously, the safety processing unit detects an interruption of the safety fields that occurs during the proper transport, removal, picking up, and / or dispensing of the first roll of material. An irregularity is therefore detectable if there is a deviation from this sequence, for example, if a person or object in the danger zone interrupts the safety fields in a sequence other than the predetermined or fixed (temporal) sequence.

[0039] The signal connections shown here are, for example, wireless. Alternatively, wired signal connections may also be used.

[0040] Subclaims 2 to 10 and 12 also relate to preferred further developments of the method according to independent claim 13.

[0041] A preferred embodiment of the invention is described below by way of example with reference to the accompanying drawing. The drawing shows: Fig. 1 a simplified side view of a material web unwinding arrangement according to the invention with two material web rollers, Fig. 2 essentially a partial view of the in Fig. 1 The illustrated material web unwinding arrangement, wherein the receiving devices or transfer arms are shown in different positions and the material web rollers are omitted for illustrative purposes, Fig. 3 Fig. 2 corresponding partial view, in which the two unwinding devices are in their material web roll change position, Fig. 4 a top view illustrating the material web unwinding arrangement according to Figures 1 to 3, whereby for illustrative purposes the material web rolls and parts of the material web unwinding arrangement are omitted, Fig. 5 a Fig. 4 corresponding top view, wherein safety fields generated by a first safety device are also illustrated, Fig. 6 Fig. 5 corresponding top view, with further safety fields generated by the first safety device as an example, Fig. 7 Fig. 5 corresponding top view, showing the entire safety area, and Fig. 8 a top view showing the transport of a material web roll to the material web unwinding arrangement with the according to Fig. 7 Active area safety devices illustrated

[0042] A corrugated board production line (not shown in its entirety in the figures) comprises a known corrugated board production setup for manufacturing a single-sided laminated corrugated board web (not shown). Such a corrugated board production setup is generally also referred to as a single facer and includes a corrugating unit with corrugating rollers for producing a corrugated web from a web of material. For bonding the corrugated web to a smooth web, the corrugated board production setup includes a glue application unit that applies glue to the peaks of the corrugated web. To press the smooth web against the glue-coated corrugated web, the corrugated board production setup has a pressure module, so that a single-sided laminated corrugated board web is formed from the corrugated and smooth webs.

[0043] The corrugated board production arrangement includes a first material web unwinding arrangement for unwinding or providing an endless material web 1 and a further or second material web unwinding arrangement (not shown) for unwinding or providing a further or second endless material web (not shown).

[0044] The continuous web of material 1 can be used, for example, to produce the corrugated sheet, which is a component of the single-sided laminated corrugated board and is also continuous. Alternatively, the continuous web of material 1 forms the smooth sheet or top sheet of the single-sided laminated corrugated board. The smooth sheet is also continuous.

[0045] The single-sided laminated corrugated board is preferably glued together with another continuous smooth or laminated board, or a single-sided laminated corrugated board, to form a double-sided laminated corrugated board, which is, for example, three or five layers thick. The additional continuous smooth and / or single-sided laminated corrugated board can also be formed by the continuous material web 1.

[0046] The double-sided laminated corrugated board is preferably cut into partial corrugated boards. Corrugated boards are then preferably produced from the double-sided laminated corrugated board or the partial corrugated boards.

[0047] Since the two material web unwinding arrangements are preferably identical, only one of the material web unwinding arrangements will be described in detail below with reference to the drawing. First, its structural design will be explained.

[0048] The material web unwinding arrangement comprises a first unwinding device 3 for unwinding a finite first material web from a first material web roll 2 and a second unwinding device 14 for unwinding a finite second material web 4 from a second material web roll 5.

[0049] The finite first material web and finite second material web 4 are firmly joined together in the material web unwinding arrangement to provide the endless material web 1, in particular by a splice or adhesive tape (not shown). The adhesive tape can be applied to these, for example, manually or mechanically. It is preferably double-sided adhesive.

[0050] The material web unwinding arrangement comprises a frame 6 with a frame base 7, a frame upright 8, and a frame support 9. The frame base 7 is attached to a floor or subfloor 10, such as a hall floor. The frame upright 8 is mounted on top of the frame base 7. The frame upright 8 extends substantially vertically or perpendicular to the floor 10. The frame upright 8 and / or frame base 7 are each formed, for example, by two side sections. The frame support 9 is arranged at an upper end of the frame upright 8 opposite the frame base 7 and runs substantially parallel to the floor 10. It extends at a distance from the floor 10.

[0051] The first unwinding device 3 has a first receiving device 11 for receiving the first roll of material 2. When the first roll of material 2 is received, the receiving device 11 is guided into a central opening (not shown) of the first roll of material 2. The first receiving device 11 comprises two retaining mandrels arranged on two parallel first displacement arms 12 of the first unwinding device 3, which project towards each other. The first displacement arms 12 are pivotably mounted about a first pivot axis 13.

[0052] The second unwinding device 14 is designed in accordance with the first unwinding device 3. It has a second receiving device 15 for receiving the second material web roll 5. When the second material web roll 5 is received, the receiving device 15 is guided into a central opening (not shown) of the second material web roll 5. The second receiving device 15 comprises two retaining pins arranged on two parallel second displacement arms 16 of the second unwinding device 14, projecting towards each other. The second displacement arms 16 are pivotally mounted about a second pivot axis 17. The pivot axes 13 and 17 are horizontal and parallel to each other. The unwinding devices 3 and 14 can be operated independently of each other.

[0053] Starting from the frame base 7 and / or frame stand 8, the first displacement arms 12 and second displacement arms 16 extend. The first displacement arms 12 and second displacement arms 16 are pivotably mounted on the frame base 7 and / or frame stand 8 and are arranged opposite each other relative to the frame base 7 and frame stand 8, respectively.

[0054] The first displacement arms 12 are part of a first displacement device and are connected to at least one first displacement drive 18. They are preferably independently displaceable.

[0055] The second displacement arms 16 are part of a second displacement device and are connected to at least one second displacement drive 19. They are preferably independently displaceable.

[0056] The first and second displacement arms 12 and 16, respectively, can each be pivoted between a lower material web roller change position and an upper unwinding position. Accordingly, the first and second receiving device 11 and 15, optionally with material web roller 2 and 5, respectively, can be pivoted. Fig. 2 The first displacement arms 12 shown in solid lines are in the material web roller change position, while the second displacement arms 16 shown in solid lines are in their unwinding position.

[0057] How Fig. 1 As shown, the frame support 9 carries a first feed roller 20 and a second feed roller 21 of the material web unwinding arrangement at its lower end. The first, finite material web can be fed via the first feed roller 20 to a cutting and joining device or splicing device of the material web unwinding arrangement, while the second, finite material web 4 can be fed via the second feed roller 21 to the cutting and joining device or splicing device. Each feed roller 20, 21 is rotatably mounted on a support arm 22 or 23, respectively, which is pivotably mounted on the frame support 9 above the respective material web roller 2 or 5 to tension the respective finite material web 4.

[0058] The cutting and joining device is used to produce the endless material web 1 from the finite first and second material webs 4. It comprises, for example, a first preparation device 24, a second preparation device 25, a first joining device 26, a second joining device 27, a table device (not shown) and a guide (not shown).

[0059] The guide runs straight in / on the frame support 9 and parallel to the floor 10.

[0060] Each preparation device 24, 25 has its own displacement drive for its displacement in preparation for the connection of the finite material path 4 with each other along the guide.

[0061] Each joining device 26, 27 is capable of joining the end of one finite web of material to the beginning of another finite web of material by means of an adhesive tape. The joining devices 26, 27 are arranged spaced apart from each other along the guide. They are arranged on the frame support 9 above the guide or the preparation devices 24, 25. Each joining device 26, 27 preferably includes a cutting unit for cutting a web of material after joining.

[0062] The preparation facilities 24, 25 and the table facility are movable relative to the connecting facilities 26, 27.

[0063] The table assembly is arranged between the two preparation units 24, 25 and, like the preparation units 24, 25, can be moved along the guide. Depending on its respective position, it interacts with the first preparation unit 24, the second preparation unit 25, the first connecting unit 26, and the second connecting unit 27, and can be moved along the guide, particularly independently of these.

[0064] The cutting and joining device is followed in one transport direction of the endless material web 1 by a first deflecting roller 28, which is rotatably mounted on a storage carriage (not shown) of the material web unwinding arrangement. The storage carriage is arranged in the area of ​​an upper end of the frame support 9 facing away from the frame stand 8 and is displaceable along a storage carriage guide (not shown) that extends parallel to the base 10 and above the guide.

[0065] The storage wagon guide defines a transfer path for the storage wagon and extends essentially along the entire frame support 9.

[0066] During operation of the material web unwinding arrangement or the corrugated board plant, the web tension of the endless material web 1 may change, leading to an automatic or independent shifting of the storage carriage along the storage carriage guide and thus also to an automatic or independent change in the storage quantity of the endless material web 1 in the material web unwinding arrangement.

[0067] To deflect the endless material web 1, a second deflection roller 30 is rotatably mounted on the frame support 9 in the area of ​​a material web outlet 29 of the material web unwinding arrangement. Downstream of the second deflection roller 30, with respect to the transport direction of the endless material web 1, is a third deflection roller 31, which is also rotatably mounted on the storage carriage.

[0068] According to Fig. 1 The second material web roller 5 is active. The finite second material web 4 is unwound from the second material web roller 5 and thus conveyed. It will eventually end. The finite first material web is then adhesively bonded to the finite second material web 4 (or the endless material web 1) and unwound.

[0069] The final second material track 4 is according to Fig. 1 The material is guided via the second feed roller 21 to the cutting and joining device. It passes between the preparation units 24 and 25. It also passes between the first preparation unit 24 and the second joining unit 27. Furthermore, it passes between the second joining unit 27 and the first joining unit 26. The preparation units 24 and 25 and the joining units 26 and 27 are essentially inactive.

[0070] After the cutting and joining device, the endless material web 1 is guided around the first deflection roller 28. It is then guided around the second deflection roller 30 and then around the third deflection roller 31. It then runs to the material web outlet 29.

[0071] The first finite web of material, originating from the first web roll 2, is held in a waiting position by the cutting and joining device, so that it can be joined to the second finite web 4 to form the endless web 1 when needed. The first unwinding device 3 is according to Fig. 1 Currently inactive.

[0072] The material web unwinding arrangement continuously provides the endless material web 1. It can also be configured differently. A generic material web unwinding arrangement is known, for example, from EP 3 231 750 A1 and the parallel US 2017 / 297849A1, to which reference is made regarding the specific design, operation, and detailed function.

[0073] As illustrated, a first safety device 32 is arranged under each first transfer arm 12 on the frame 6, for example on the outside, and is part of a first area safety device. The material web unwinding arrangement thus comprises two first safety devices 32, which are arranged horizontally spaced apart from each other.

[0074] A second safety device 33 is arranged on the frame 6, for example on the outside, under every second transfer arm 16. This second safety device is part of a second area safety device. The material web unwinding arrangement thus comprises two second safety devices 33, which are arranged horizontally spaced apart from each other.

[0075] The first safety devices 32 and second safety devices 33 are fixedly arranged at the base of the frame 6, in particular on its frame base 7 and / or frame stand 8.

[0076] Each first safety device 32 is arranged adjacent to a first displacement arm 12 on the frame 6. For example, the two first safety devices 32 are arranged between the first displacement arms 12 or directly vertically below them on the frame 6. They are each directed away from the second unwinding device 14.

[0077] Every second safety device 33 is arranged adjacent to a second displacement arm 16 on the frame 6. For example, the two second safety devices 33 are arranged between the second displacement arms 16 or directly vertically below them on the frame 6. They are each directed away from the first unwinding device 3.

[0078] The first safety devices 32 are arranged opposite the second safety devices 33.

[0079] Each first and second safety device 32 and 33 respectively is in signal communication with a safety processing unit 34 at least temporarily, preferably continuously or always ( Fig. 2 ).

[0080] How Fig. 5 To illustrate by way of example, a first safety device 32 is capable, particularly continuously, of generating a rectangular first safety field 35 during operation. The first safety field 35 extends uniformly from both sides of the first corresponding first safety device 32 and is parallel to the first pivot axis 13. It also extends perpendicularly to the first pivot axis 13 away from the material web unwinding arrangement or second unwinding device 14 over the adjacent first displacement arm 12. The first displacement arm 12, which is arranged adjacent to the first safety device 32, is located at least partially, preferably at least largely, within the first safety field 35.

[0081] The first safety device 32 also generates, during operation, particularly continuously, a second safety field 36, which, for example, has the shape of a right-angled triangle and extends largely laterally adjacent to the first safety field 35. The second safety field 36 extends laterally outwards from the corresponding first safety device 32 parallel to the first pivot axis 13, i.e., away from the other first safety device 32. Furthermore, like the first safety field 35, it extends perpendicularly to the first pivot axis 13 away from the material web unwinding arrangement or second unwinding device 14. With increasing distance from the first safety device 32 along the first pivot axis 13, the extent of the second safety field 36 perpendicular to the first pivot axis 13 increases. The second safety field 36 forms a laterally external safety field.

[0082] The first safety field 35 and the second safety field 36 extend, for example, by an identical amount from the corresponding first safety device 32 perpendicular to the first pivot axis 13. They overlap adjacent to the corresponding first safety device 32.

[0083] The first safety device 32 is also capable of generating, particularly continuously, a third safety field 37, which is again configured as a rectangular triangle and extends from the first safety device 32 in the opposite direction to the second safety field 36. It extends from the corresponding first safety device 32 parallel to the first pivot axis 13 towards the other first safety device 32 and preferably over this device and the first displacement arm 12 located therein. As the distance of the third safety field 37 from the corresponding first safety device 32 along the first pivot axis 13 increases, the extent of the third safety field 37 perpendicular to the first pivot axis 13 also increases. The third safety field 37 covers a central area, or material web roll receiving area, of the first unwinding device 3.

[0084] The maximum extent of the third safety field 37 perpendicular to the first pivot axis 13 is, for example, between 20% and 60%, preferably between 30% and 50%, of the maximum extent of the first safety field 35 away from the corresponding first safety device 32 perpendicular to the first pivot axis 13.

[0085] The first safety field 35 and the third safety field 37 overlap adjacent to the corresponding first safety device 32.

[0086] The first safety field 35 is located between the second safety field 36 and the third safety field 37.

[0087] The first safety field 35, second safety field 36 and third safety field 37 each have aligned baselines that extend adjacent to and parallel to the first pivot axis 13.

[0088] The safety fields 35, 36, 37 detect the first unwinding device 3 and, for example, the transport of the first material web rolls 2 to this device and the removal of the first material web rolls 2 away from this device.

[0089] The other first safety device 32 is, for example, capable of generating corresponding safety fields 35, 36, 37, which then cover, among other things, a different side area of ​​the material web unwinding device and thus ensure improved, large-area protection. These safety fields 35, 36, 37 of the two first safety devices 32 jointly detect the first unwinding device 3 and, for example, the transport of the first material web rolls 2 to it and the transport of the first material web rolls 2 away from it. Both first safety devices 32 are preferably active during operation of the material web unwinding arrangement. They can be symmetrical to each other during operation. The safety fields 37 of the first safety devices 32 overlap. The safety fields 35, 36, 37 generated by the two first safety devices 32 can also differ from each other.

[0090] The second safety devices 33 are also capable of generating corresponding safety fields 35, 36, 37, which extend relative to the material web unwinding arrangement opposite the safety fields 35, 36, 37 generated by the first safety devices 32. The safety fields 35, 36, 37 generated by the second safety devices 33 detect the second unwinding device 14 and, for example, the transport of two material web rolls 5 to it and the transport of two material web rolls 5 away from it. Both second safety devices 33 are preferably active when the material web unwinding arrangement is in operation. Advantageously, the first and second safety devices 32, 33 are active simultaneously. The second safety devices 33 are also capable of generating other safety fields. The safety fields 35, 36, 37 generated by the first and second safety devices 32, 33 can differ from one another.

[0091] How Fig. 6 As shown, the first safety device 32 alternatively generates several, as many as two to six, first safety fields 35 during operation, which are arranged parallel to the first pivot axis 13 and laterally offset from one another. The first safety fields 35 largely overlap. It also generates several, as many as two to six, second safety fields 36 during operation, which are arranged parallel to the first pivot axis 13 and laterally offset from one another. The second safety fields 36 largely overlap. The first safety device 32 also generates several, as many as two to six, third safety fields 37 during operation, which are arranged parallel to the first pivot axis 13 and laterally offset from one another. The third safety fields 37 largely overlap. The first safety fields 35 overlap the second and third safety fields 36 and 37 adjacent to the first safety device 32.

[0092] The other first safety device 32 is capable of generating corresponding safety fields 35, 36, 37 or other safety fields. The second safety devices 33 are also capable of generating corresponding safety fields 35, 36, 37 or other safety fields.

[0093] According to Fig. 7 The two first safety devices 32 alternatively generate a common first safety field 38 during operation. The safety subfields generated by each of the two first safety devices 32 merge into one another. The common first safety field 38 extends laterally and uniformly beyond the two first safety devices 32, parallel to the first pivot axis 13, and encompasses external areas. It also extends perpendicularly to the first pivot axis 13 away from the second rolling device 14 over the first displacement arms 12. The common first safety field 38 has a substantially elongated, polygonal shape. The extent parallel to the first pivot axis 13 is significantly greater than the extent perpendicular to it. The common first safety field 38 has two parallel side edges. It also has an outer boundary edge that runs perpendicular to the side edges.The common first security field 38 is symmetrical.

[0094] The second safety devices 33 are able to generate a corresponding common second safety field 39, which extends from the second safety devices 33 away from the first rolling device 3.

[0095] Fig. 8 shows, by way of example, how a second roll of material is transported and thereby enters the common second safety field 39 according to Fig. 7 The second material web roll 5 enters from the side, parallel to the second pivot axis 17. It is transported by a transport carriage 40, which has several running units, such as wheels, and at least one independent drive unit. The transport carriage 40 is driverless or self-propelled. It is steerable. Preferably, it travels between the material web unwinding arrangement and a material web roll storage area. Advantageously, a plurality of transport carriages 40 are available. These are preferably controllable or movable differently. Instead of the transport carriage 40, transport via a conveyor chain or rail transport system, or the like, is also possible.

[0096] The operation of the material web unwinding arrangement is described below, for example using a transport trolley 40.

[0097] Automatic operation of the material web unwinding arrangement is started by, preferably once, actuating an actuating device, such as a push button. It continues automatically until the picking up of a material web roll 2 or 5 into the corresponding receiving device 11 or 15, or the placing of the material web roll 2 or 5 from the corresponding receiving device 11 or 15 onto the transport carriage 40, is completed.

[0098] In automatic operation, the following steps are carried out to pick up the material web roll 2 or 5 into the corresponding receiving device 11 or 15 from the transport carriage 40: The transport of the corresponding material web roll 2 or 5 by means of a transport carriage 40, preferably via a designated transport path or a predetermined side, is started by manually actuating the actuating device, such as pressing it. The material web roll 2 or 5 is moved on the transport carriage 40 to the receiving device 11 or 15. The transport of the material web roll 2 or 5 is stopped when the material web roll 2 or 5 is centered with respect to the receiving device 11 or 15. The transfer arms 12 or 16 are lowered from their upper unwinding position to the lower material web roll changeover position by the respective transfer device, provided they are not already in the material web roll changeover position. After the transfer arms 12 or 16 have reached the material web roll changeover position, the material web roll 2 or 5 is tensioned.5, until it has been reliably determined that the material web roll 2 or 5 is tensioned; moving the material web roll 2 or 5 upwards from the transport carriage 40 by the respective moving device into its unwinding position; centrally aligning the material web roll 2 or 5; preferably monitoring is carried out to ensure that the corresponding material web roll 2 or 5 remains tensioned; the picking up of the material web roll 2 or 5 from the receiving device 11 or 15 is completed and the automatic operation is stopped.

[0099] After the pickup is complete, the transport carriage 40 leaves the area below the picked-up material web roll 2 or 5. Threading a web start of the material web roll 2 or 5 into the material web unwinding arrangement can be done manually or automatically.

[0100] Individual steps may be omitted. With a different transport device, the steps described are (essentially) analogous.

[0101] In automatic operation, the following steps are carried out to place the material web roll 2 or 5 from the corresponding receiving device 11 or 15 onto the transport carriage 40: Manual actuation of the actuating device, such as by pressing, triggers the movement of an empty transport carriage 40 to transport the corresponding web roll 2 or 5, which is, for example, a web remnant or empty roll, to the receiving device 11 or 15; the transport carriage 40 aligns itself centrally with this device; the web roll 2 or 5 is placed on the transport carriage 40 by being lowered by the respective transfer device; in doing so, the transfer arms 12 or 16 are moved downwards from the unwinding position to the web roll change position; the web roll 2 or 5 is released when it is ensured that it rests securely on the transport carriage 40; the web roll 2 or 5 is transported away from the web unwinding arrangement via a designated transport path or a predetermined side; the automatic operation is then terminated.

[0102] Individual steps may be omitted. With a different transport device, the steps described are (essentially) analogous.

[0103] The following steps are carried out in fully automatic operation to pick up the material web roll 2 or 5 into the corresponding receiving device 11 or 15 from the transport carriage 40: The material web unwinding arrangement sends a signal, for example to a higher-level processing unit, that it is ready to pick up a material web roll 2 or 5. A transport carriage 40 automatically moves a material web roll 2 or 5 centrally into the unwinding device 3 or 14.

[0104] Otherwise, fully automatic operation is essentially the same as automatic operation. With other transport equipment, the steps described are (essentially) analogous.

[0105] The following steps are carried out in fully automatic operation to transfer a material web roll 2 or 5 from the receiving device 11 or 15 to a transport carriage 40: The material web unwinding arrangement sends a signal, for example to a higher-level processing unit, that it is ready to dispense a material web roll 2 or 5; an empty transport trolley 40 is requested; the transport trolley 40 signals when it is in the middle of the material web unwinding arrangement or the corresponding unwinding device 3 or 14; the material web roll 2 or 5 is then placed on the transport trolley 40 accordingly.

[0106] The fully automatic operation is similar to the automatic operation during the unloading of the material web, to which reference is made. After the material web roll 2 or 5 is placed on the transport carriage 40, the material web unwinding device sends a signal that the transport carriage 40 can transport the material web roll 2 or 5, which it then does.

[0107] For other transport equipment, the steps described are (essentially) analogous.

[0108] A changeover between individual businesses is possible.

[0109] The following describes the operation of the material web unwinding arrangement with active area safety device when a material web roll 2 or 5 is inserted into the receiving device 11 or 15.

[0110] If the first and second area safety devices are functioning correctly Fig. 7 , 8Since only one common safety field 38 or 39 is generated, simple safety monitoring is provided. Both the first and second area safety devices are capable of detecting persons, material rolls 2 or 5, transport trolleys 40, and other objects in the danger zone and, if necessary, initiating the stopping or slowing of a hazardous movement in the danger zone. This applies to the transport of a material roll 2 or 5, the removal of a material roll 2 or 5, and the operation of the material roll unwinding arrangement.

[0111] If the first or second area safety device is in operation accordingly Fig. 5 , 6To generate multiple safety fields 35, 36, 37, the transport carriage 40 or the material web reel 2 or 5 must interrupt these safety fields 35 to 37 in a predetermined, exact sequence. If an error or irregularity occurs in the sequence, an error signal is sent to the safety processing unit 34. This irregularity could, for example, be caused by a person located within a safety field 35, 36, or 37. It is advisable to perform a plausibility check when safety fields 35, 36, or 37 are interrupted. After a safety field 35 to 37 is interrupted, at least one further safety field must be interrupted within a predetermined or known cycle or time period.Otherwise, it can be determined that the material web roll transport is not in accordance with regulations. A logic function determines whether material web roll 2 or 5 is moving, or whether, instead of material web roll 2, 5, or additionally, the safety fields 35, 36, or 37 are being interrupted by a person or other object. If necessary, the system initiates the stopping or slowing of any hazardous movement within the danger zone. This safety monitoring is more complex and effective than simple safety monitoring.

[0112] Recording can be resumed, for example, via a corresponding manual release.

[0113] The removal of material web roll 2 or 5 is monitored and secured in essentially the same way.

[0114] The material web unwinding system can also be used outside of corrugated board manufacturing. For example, it can be used in printing and is capable of unwinding a printed web. It can also be used, for example, in gypsum board production and die-cutting.

Claims

1. Material web unwinding assembly, a) having a frame (6), b) having a first unwinding arrangement (3), arranged on the frame (6), for unwinding a finite first material web from a first material web roll (2), wherein the first unwinding arrangement (3) has i) a first receiving device (11) for receiving the first material web roll (2), and ii) a first displacement device for displacing the first receiving device (11) between an unwinding position and a material web roll change position, and c) having a first region safety device with at least one first safety device (32) for at least partially securing a material web roll transport region for transporting the first material web roll (2) to the first unwinding arrangement (3), a material web roll removal region for removing the first material web roll (2) from the first unwinding arrangement (3) and / or a working region of the first unwinding arrangement (3), wherein each of the at least one first safety devices (32) is capable of generating at least two different safety fields (35, 36, 37) that extend away from the material web assembly, and characterised in that the region safety device is configured to: i) monitor a temporal sequence of interruptions of the safety fields (35, 36, 37), and ii) detect any irregularity in the interruptions during proper transport, removal, receiving and / or delivery of the first material web roll.

2. Material web unwinding assembly according to Claim 1, characterised in that each first safety device (32) is capable of producing between two and ten different safety fields (35, 36, 37) for detecting irregularities.

3. Material web unwinding assembly according to Claim 2, characterised in that the safety fields (35, 36, 37) are at least partially next to one another during operation.

4. Material web unwinding assembly according to Claim 2 or 3, characterised in that the safety fields (35, 36, 37) partially overlap one another during operation.

5. Material web unwinding assembly according to one of Claims 2 to 4, characterised in that the safety fields (35, 36, 37) have different shapes and / or sizes during operation.

6. Material web unwinding assembly according to one of Claims 2 to 5, characterised in that the safety fields (35, 36, 37) extend in different directions from the respective first safety device (32) during operation.

7. Material web unwinding assembly according to one of Claims 2 to 6, characterised in that the first region safety arrangement emits an error signal upon detecting an irregularity in an interruption of safety fields (35, 36, 37).

8. Material web unwinding assembly according to one of the preceding claims, characterised in that the at least one first safety device (32) is arranged on the frame (6).

9. Material web unwinding assembly according to Claim 8, characterised in that the at least one first safety device (32) is arranged at a foot side of the frame (6).

10. Material web unwinding assembly according to Claim 8 or 9, characterised in that the at least one first safety device (32) is arranged below the first displacement device.

11. System, in particular corrugated cardboard system, a) having at least one material web unwinding assembly according to one of the preceding claims, and b) having at least one transport device (40) for transporting the first material web roll (2) to the first unwinding arrangement (3) and / or removing the first material web roll (2) from the first unwinding arrangement (3).

12. System according to Claim 11, characterised by a safety processing unit (34), which is at least temporarily in signal communication - with the at least one first safety device (32) for receiving region signals, and - with the at least one transport device (40) for, if applicable, stopping or slowing down same to avoid an accident and / or with the first unwinding arrangement (3) for, if applicable, at least partially stopping or slowing down same to avoid an accident.

13. Method, comprising the steps of - at least partially securing a material web roll transport region for transporting a first material web roll (2) to a first unwinding arrangement (3), arranged on a frame (6), for unwinding a finite first material web from the first material web roll (2), material web roll removal region for removing the first material web roll (2) from the first unwinding arrangement (3) and / or working region of the first unwinding arrangement (3) by means of a first region safety device with at least one first safety device (32), wherein the first unwinding arrangement (3) has -- a first receiving device (11) for receiving the first material web roll (2), and -- a first displacement device for displacing the first receiving device (11) between an unwinding position and a material web roll change position and wherein each of the at least one first safety devices (32) is capable of generating at least two different safety fields (35, 36, 37) that extend away from the material web assembly, and characterised in that the region safety arrangement is configured to: i) monitor a temporal sequence of interruptions of the safety fields (35, 36, 37), and ii) detect any irregularity in the interruptions during proper transport, removal, receiving and / or delivery of the first material web roll.

14. Method according to Claim 13, characterised in that a safety processing unit (34) emits an error signal when an irregularity in an interruption of safety fields (35, 36, 37) of the first region safety device is detected and preferably - stops or slows down, if applicable, at least one transport device (40) for transporting the first material web roll (2) to the first unwinding arrangement (3) and / or removing the first material web roll (2) from the first unwinding arrangement (3), and / or at least partially stops or slows down a receiving of the first material web roll (2) from the first receiving device (11), and / or at least partially stops or slows down delivery of the first material web roll (3) from the first receiving device (11) to the at least one transport device (40).

15. Method according to Claim 14, characterised in that the safety processing unit (34) monitors a sequence of the interruption of the safety fields (35, 36, 37).