Material web unwinding device

Abstract

The invention relates to a material web unwinding device having a machine frame (6) and a first unwinding device (3) arranged on the machine frame (6) for unwinding a limited first material web from a first material web roll (2). The first unwinding device (3) comprises a first receiving device (11) for receiving the first material web roll (2) and a first transfer device for position transfer of the first receiving device (11) between an unwinding position and a material web roll replacement position. Furthermore, the material web unwinding device has a first area safety device comprising at least one first safety device (32), the invention relates to a protection device (1) for protecting a material web roll feeding region for feeding a first material web roll (2) into a first unwinding device (3), a material web roll discharging region for discharging the first material web roll (2) from the first unwinding device (3) and / or a working region of the first unwinding device (3) at least in some regions.

Description

[0001] This patent application claims the priority of German patent application DE 10 2022 210 508.7, the content of which is incorporated herein by reference. Technical Field

[0002] The invention relates to a material web unwinding device for unwinding a material web, such as a paper web, a cardboard web or the like, for example for forming a corrugated board web, such as a single-sided or double-sided laminated corrugated board web. The invention also relates to an apparatus, such as a corrugated board apparatus, having at least one such material web unwinding device. The invention also relates to a corresponding method. Background Art

[0003] It is known from the prior art through prior art examples to install accident prevention light curtains around material web unwinding devices in order to protect personnel, in particular, from accidents. The accident prevention light curtains operate in a contactless manner and form a beam field in order to protect the danger zone around the respective material web unwinding device. An interruption of one or more beam paths triggers a command, for example, to shut down the entire material web unwinding device or a part thereof. The disadvantage in this case is that accidents still occur despite the accident prevention light curtains. Occasionally, false triggering also occurs, which often has a negative impact on production. Summary of the invention

[0004] The object of the invention is to overcome the disadvantages of the prior art. In particular, a material web unwinding device is to be realized which provides a particularly high and reliable protection. False triggering is to be avoided. Furthermore, a corresponding device having at least one such material web unwinding device and a corresponding method are to be provided.

[0005] This object is achieved according to the invention by the features specified in the main claims 1, 11 and 13. The core of the invention is a first area safety device which is able to protect a (dangerous) area or region which extends in the vicinity of the material web unwinding device or the first unwinding device.

[0006] The first area safety device advantageously operates in a contactless manner and is, for example, reliably capable of protecting persons from injuries or accidents, for example when the first unwinding device is in operation. The first area safety device preferably forms a protective field consisting of a beam, in particular a laser beam, in operation, in particular a fine protective field, which has, for example, a (maximum) extension of between 2 m and 5 m from the respective first safety device. The first area safety device is preferably capable of detecting or identifying unauthorized or authorized material web rolls, unauthorized or authorized transport devices, persons and / or other unauthorized or authorized objects. Due to the first area safety device, no intervention by (operating) personnel is required when the material web unwinding device is in operation. Preferably, the first area safety device is capable of meeting performance level d.

[0007] Advantageously, the at least one first safety device is designed as a scanner, in particular a laser scanner. Preferably, there are between two and four first safety devices. These first safety devices are preferably arranged spaced apart from each other. Preferably, these first safety devices are identical in structure. They may also be different in structure or have different properties.

[0008] The frame is rigid and preferably has a base, columns and beams. The frame is preferably fixed in / at the ground or base.

[0009] The first unwinding device expediently comprises a first braking unit which is capable of exerting a first braking force on the first material web roll when unwinding it.

[0010] The first receiving device can be displaced axially and / or tilted, for example. The first receiving device preferably comprises at least one retaining mandrel which can be inserted axially into the first material web roll or its central support sleeve. The first material web roll is thus supported and then preferably extends horizontally. The first material web roll is kept at a distance from the ground. Advantageously, the first receiving device has two oppositely disposed retaining mandrels which, when in use, are inserted into the material web roll or its support sleeve at the end faces opposite each other.

[0011] The first transfer device comprises, for example, at least one first transfer drive. Advantageously, the first transfer drive enables a vertical position shift, in particular a pivoting, of the first receiving device between the unwinding position and the material web roll changing position. The at least one first transfer drive is, for example, embodied as a hydraulic, pneumatic or electric drive. The at least one first transfer drive is preferably designed to be variable in length and is preferably designed as a piston-cylinder unit. The first receiving device and the transfer device are preferably in direct or indirect connection with one another.

[0012] The unwinding position of the first receiving device is preferably located above the material web roll changing position of the first receiving device. When the material web unwinding device is in operation, unwinding of the first material web takes place when the first receiving device is in the unwinding position. In the material web roll changing position, the first receiving device can receive a new first material web roll or unload an old, for example already at least partially used, first material web roll.

[0013] Advantageously, at least one sensor (such as an angle sensor, a camera or the like) detects the unwinding position and / or the material web change position or the corresponding position of the first transfer device or the first receiving device. Advantageously, the corresponding position signals are directly or indirectly transmitted to the safety processing unit.

[0014] Preferably, the material web unwinding device can operate automatically (eg semi-automatically or fully automatically), in particular receive and / or unwind the first material web roll.

[0015] A material web roll is understood here to be a roll which is new / full and therefore carries a limited amount of material web, or which is empty and therefore carries no (any more) material web, or carries an intermediate amount of material web, for example residual material web.

[0016] The transport device is designed, for example, as a ground, underground or overhead transport device. The web rolls of material can preferably be transported into the web unwinding device and / or handed over to the web unwinding device in an automated or unmanned manner. These web rolls of material can preferably be transported out of the web unwinding device and / or received by the web unwinding device in an automated or unmanned manner. The transport device preferably has at least one drive device. It is expedient for the transport device to include at least one own safety device, such as a camera, a scanner or the like, in particular the transport device can be operated or transported in an autonomous manner and is designed as a transport trolley. The at least one safety device of the transport device, if any, can, for example, immediately stop the transport device when a danger is detected.

[0017] The transport device is, for example, a ground transport, such as a transport trolley, which is preferably capable of transporting the material web rolls in an autonomous or automated manner. The transport device preferably has a travel unit, such as a wheel unit, a chain unit or the like, for support on a substrate or floor. The transport device advantageously comprises its own energy storage unit and is capable of receiving travel signals or operating signals when operated. The transport device is preferably capable of communicating directly or indirectly with a safety processing unit. The safety device / s, if any, of the transport device is, for example, directed to the front, to the side outside and / or to the rear.

[0018] Alternatively, the transport device is correspondingly designed, for example, as an (infinite) conveyor transport device, such as a chain conveyor for transporting material web rolls, or a rail conveyor for transporting material web rolls on rails.

[0019] The material web unwinding device is expediently symmetrical with respect to the plane of symmetry.

[0020] Further advantageous embodiments of the invention are disclosed in the dependent claims.

[0021] The safety fields that can be generated by the first safety device according to the dependent claim 2 are fictitious and invisible. Advantageously, the safety fields are synchronous or exist simultaneously. It is expedient that the safety fields extend from the material web unwinding device and / or at least partially along the material web unwinding device, for example at least partially along the first unwinding device. These safety fields can have the same shape and / or size when in operation. By means of these safety fields, abnormal situations, such as unauthorized access to a danger zone, such as (operating) personnel, material web rolls, transport devices and / or other objects, can be detected or identified. These safety fields are preferably freely configurable.

[0022] The material web unwinding device according to the dependent claim 3 is particularly functionally reliable and not prone to malfunctions. The safety fields provide a particularly large identification or detection area. The safety fields preferably extend horizontally.

[0023] The embodiment according to dependent claim 4 is also particularly functionally reliable and resistant to malfunctions. It is advantageous if the safety fields overlap in certain areas near the first safety device generating the safety fields. Advantageously, the safety fields also have areas that do not overlap one another.

[0024] The safety field according to the dependent claim 5 has, for example, a (substantially) rectangular, trapezoidal, triangular and / or sector-shaped, such as a partially circular, such as a semicircular shape, when in operation. Combinations are possible. Advantageously, the shape or size of these safety fields remains unchanged during operation. The shape and / or size depends, for example, on the spatial conditions and / or on the transport route of the material web roll or on at least one transport device.

[0025] The material web unwinding device according to the dependent claim 6 is particularly functionally reliable and not prone to malfunctions. For example, the safety fields extend from the respective first safety device in opposite directions, obliquely or perpendicularly to one another. It is expedient for at least one safety field to extend along the first receiving device and / or perpendicularly thereto.

[0026] According to the dependent claim 7, interruptions of the safety field are preferably monitored, in particular the time or logical sequence of interruptions. Advantageously, the first area safety device or the safety processing unit is aware of interruptions of the safety field that exist during the correct transport in, transport out, receipt and / or discharge of the first material web roll. Thus, abnormal situations can be detected in the event of deviations, for example when persons or objects in the danger zone interrupt the safety field in a manner that deviates from a predetermined or prescribed (time) sequence.

[0027] The design according to dependent claim 8 results in a very functionally reliable and simple material web unwinding device. At least one first securing device is stationary or immovable. Thus, the first securing device and the first receiving device or first transfer device are movable relative to one another.

[0028] The embodiment according to dependent claim 9 allows, for example, safe identification or detection of persons and / or material web rolls being transported in or out.

[0029] In the embodiment according to dependent claim 10, a functionally reliable, non-interfering detection of persons and / or material web rolls is again possible. The at least one first safety device is arranged on the machine frame, for example, directly below the first transfer device or (laterally) offset therefrom.

[0030] The material web unwinding device advantageously comprises a second unwinding device for unwinding a limited second material web from a second material web roll. The second unwinding device is preferably constructed like the first unwinding device. Advantageously, the limited second material web is implemented like the limited first material web. The material web unwinding device is preferably designed as a material web splicing device, which can produce or unwind an unlimited material web from a limited first material web and a second material web, in particular for corrugated board production. Advantageously, there is also a second area safety device, which is constructed like the first area safety device and works in a similar manner. The safety fields of the first area safety device and the second area safety device are preferably arranged spaced apart from each other during operation. They have, for example, symmetrical directions to each other.

[0031] The safety processing unit according to claim 12 is preferably of electrical or electronic type. It is, for example, a component of a material web unwinding device or a superordinate safety processing unit thereof. The zone signals are signals that characterize the protected zone. These zone signals are of electrical type and form safety signals.

[0032] The safety handling unit can, for example, stop or slow down dangerous movements in production in the event of a danger. The safety handling unit can, for example, stop or slow down at least one transport device in the event of a danger, in order to avoid accidents, for example with personal injury. Alternatively or additionally, the safety handling unit can, for example, completely stop or slow down the first unwinding device in the event of a recognized danger, alternatively only stop or slow down at least one individual function of the first unwinding device, such as unwinding the first material web roll, raising and / or lowering the first material web roll, in order to avoid accidents. For example, an optical or acoustic warning signal can additionally be output.

[0033] The signal processing device can receive and process signals, such as zone signals or safety signals. The signal processing device can also preferably output signals, such as control signals or error signals.

[0034] The embodiments according to dependent claim 12 apply essentially analogously to dependent claim 14 .

[0035] According to the dependent claim 15, interruptions of the safety field are preferably monitored, in particular the time or logical sequence of interruptions. Advantageously, the safety processing unit is aware of interruptions of the safety field that exist during the correct transport in, transport out, receipt and / or discharge of the first material web roll. Thus, abnormal situations can be detected in the event of deviations, for example when persons or objects in the danger zone interrupt the safety field in a manner that deviates from a predetermined or prescribed (time) sequence.

[0036] The signal connection indicated here is implemented as wireless, for example. Alternatively, a wired signal connection may also exist.

[0037] Dependent claims 2 to 10 and 12 also relate to preferred developments of the method according to dependent claim 13 . BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. In the accompanying drawings:

[0039] Figure 1 shows a simplified side view of a material web unwinding device according to the invention with two received material web rolls;

[0040] Figure 2 Mainly shows Figure 1 A partial view of a material web unwinding device shown in FIG. 1 , wherein a receiving device or transfer arm is shown in a different position and the material web roll is omitted for ease of illustration;

[0041] Figure 3 Shown with Figure 2 a corresponding partial view with the two unwinding devices in their material web roll changing position;

[0042] Figure 4 A top view is shown, which shows the Figures 1 to 3 A material web unwinding device is shown, wherein the material web roll and portions of the material web unwinding device are omitted for ease of illustration;

[0043] Figure 5 Shown with Figure 4 a corresponding top view, in which the safety field generated by the first safety device is shown together for the sake of illustration;

[0044] Figure 6 Shown with Figure 5 A corresponding top view, in which, for example, a further safety field is generated by the first safety device;

[0045] Figure 7 Shown with Figure 5 a corresponding top view showing the entire safety field; and

[0046] Figure 8 A top view is shown showing the process of conveying a material web roll into a material web unwinding device, with Figure 7 Active area safety devices. DETAILED DESCRIPTION

[0047] The corrugated board plant (not shown in its entirety in the figure) comprises a known corrugated board production device for producing a single-sided laminated corrugated board web (not shown in the figure). Such a corrugated board production device is generally also called a single-facer and has an embossing device including an embossing roller for producing a corrugated board web with a corrugated shape from a material web. In order to connect the corrugated web to a flat paper web, the corrugated board production device has a gluing device, which applies glue to the crests of the corrugated web. The corrugated board production device has a pressing module for pressing the flat paper web against the corrugated web coated with glue, thereby producing a single-sided laminated corrugated board web from the corrugated web and the flat paper web.

[0048] Arranged upstream of the corrugated board production device is a first material web unwinding device for unwinding or supplying an endless material web 1 and a further or second material web unwinding device (not shown) for unwinding or supplying a further or second endless material web (not shown).

[0049] For example, a corrugated web can be produced from the infinite material web 1, which is a component of a single-sided corrugated board web and is also infinite. Alternatively, the infinite material web 1 forms a flat paper web or a face paper web of a single-sided corrugated board web. The flat paper web is also infinite.

[0050] The single-sided laminated corrugated cardboard web is preferably connected to another infinite flat paper web or laminated web or a single-sided laminated corrugated cardboard web by gluing to form a double-sided laminated corrugated cardboard web, which is, for example, three-layer or five-layer. The other infinite flat paper web and / or single-sided laminated corrugated cardboard web can also be formed by the infinite material web 1.

[0051] The double-sided laminated corrugated board web is preferably cut into partial corrugated board webs. Corrugated board sheets are preferably produced from the double-sided laminated corrugated board web or partial corrugated board webs.

[0052] Since the two material web unwinding devices are preferably identical, only one of the material web unwinding devices will be described in detail below with reference to the drawings. First, their design will be explained.

[0053] The material web unwinding device comprises a first unwinding device 3 for unwinding a limited first material web from a first material web roll 2 and a second unwinding device 14 for unwinding a limited second material web 4 from a second material web roll 5 .

[0054] The first limited material web and the second limited material web 4 are firmly connected to each other, in particular by means of a splicing strip or adhesive tape (not shown), in order to supply the unlimited material web 1 in the material web unwinding device. The adhesive tape can be applied to these material webs, for example manually or mechanically. The adhesive tape is preferably double-sided adhesive.

[0055] The material web unwinding device has a frame 6 including a frame base 7, a frame column 8 and a frame beam 9. The frame base 7 is fixed in or at a floor or substrate 10, such as a workshop floor. The frame column 8 is mounted on top of the frame base 7. The frame column 8 extends substantially vertically or perpendicularly to the floor 10. The frame column 8 and / or the frame base 7 are each formed, for example, by two side parts. The frame beam 9 is arranged at the upper end region of the frame column 8 opposite the frame base 7 and substantially parallel to the floor 10. The frame beam extends spaced apart from the floor 10.

[0056] The first unwinding device 3 has a first receiving device 11 for receiving the first material web roll 2, which, when the first material web roll 2 is in the received state, is introduced into a central opening (not shown) of the first material web roll 2. The first receiving device 11 comprises two holding mandrels, which are arranged at two mutually parallel first transfer arms 12 of the first unwinding device 3 and extend towards each other therefrom. The first transfer arms 12 are mounted in a manner that allows them to pivot about a first pivot axis 13.

[0057] The second unwinding device 14 is designed corresponding to the first unwinding device 3. It has a second receiving device 15 for receiving the second material web roll 5, which is introduced into the central opening (not shown) of the second material web roll 5 when the second material web roll 5 is in the received state. The second receiving device 15 comprises two holding mandrels, which are arranged at two mutually parallel second transfer arms 16 of the second unwinding device 14 and extend towards each other therefrom. The second transfer arm 16 is supported in a manner that allows it to pivot about a second pivot axis 17. The pivot axes 13 and 17 are horizontal and parallel to each other. The unwinding devices 3, 14 can be operated independently of each other.

[0058] The first transfer arm 12 and the second transfer arm 16 extend from the frame base 7 and / or the frame column 8. The first transfer arm 12 and the second transfer arm 16 are pivotably supported on the frame base 7 and / or the frame column 8 and are arranged opposite to the frame base 7 or the frame column 8.

[0059] The first transfer arms 12 are components of a first transfer device and are in drive connection with at least one first transfer drive 18. They can preferably be moved in position independently of one another.

[0060] The second transfer arms 16 are components of a second transfer device and are in drive connection with at least one second transfer drive 19. They can preferably be moved in position independently of one another.

[0061] The first transfer arm 12 and the second transfer arm 16 can be pivoted between a lower material web roll changing position and an upper unwinding position. Thus, the first receiving device 11 or the second receiving device 15 can be pivoted, if appropriate with the material web roll 2 or 5. Figure 2 In the drawing, the first transfer arm 12 shown in solid lines is in its material web roll changing position, while the second transfer arm 16 shown in solid lines is in its unwinding position.

[0062] like Figure 1 As shown, the frame beam 9 supports the first feed roller 20 and the second feed roller 21 of the material web unwinding device at the bottom. The limited first material web can be fed into the cutting and connecting device or the splicing device of the material web unwinding device via the first feed roller 20, and the limited second material web 4 can be fed into the cutting and connecting device or the splicing device via the second feed roller 21. Each feed roller 20, 21 is rotatably supported at a support arm 22 or 23, which is pivotably supported at the frame beam 9 above the material web roll 2 or 5 for tensioning the respective limited material web 4.

[0063] The cutting and connecting device is used to manufacture the limited first material web and the second material web 4 into the infinite material web 1. The cutting and connecting device comprises, for example, a first preparation device 24, a second preparation device 25, a first connection device 26, a second connection device 27, a table device (not shown) and a guide rail (not shown).

[0064] The guide rail runs straight in / at the frame beam 9 and parallel to the floor 10 .

[0065] Each preparation device 24 , 25 has its own transfer drive for positional transfer along the guide rails in order to prepare for connecting the limited material webs 4 to one another.

[0066] Each connecting device 26, 27 is capable of connecting the web end of a limited material web to the web beginning of another limited material web by means of an adhesive tape. The connecting devices 26, 27 are arranged spaced apart from each other along the guide rail. These connecting devices are arranged at the frame beam 9 above the guide rail or preparation device 24, 25. Each connecting device 26, 27 preferably comprises a cutting unit for cutting the material web after connection.

[0067] The preparation devices 24 , 25 and the table device can be displaced relative to the connection devices 26 , 27 .

[0068] The workbench device is arranged between the two preparation devices 24, 25 and can be shifted along the guide rail like the preparation devices 24, 25. The workbench device cooperates with the first preparation device 24, the second preparation device 25, the first connecting device 26 or the second connecting device 27 according to its respective position and can be shifted along the guide rail, especially independently of these devices.

[0069] In the transport direction of the endless material web 1, downstream of the cutting and connecting device, a first deflection roller 28 is arranged, which is rotatably supported on a storage trolley (not shown) of the material web unwinding device. The storage trolley is arranged in the region of the upper end of the frame beam 9 facing away from the frame column 8 and can be shifted along storage trolley rails (not shown) extending parallel to the floor 10 and above the above rails. The storage trolley rails define the transfer path for the storage trolley and extend substantially along the entire frame beam 9.

[0070] When the material web unwinding device or the corrugated board machine is in operation, it may happen that the web tension of the infinite material web 1 changes, which causes the storage trolley to automatically or autonomously shift its position along the storage trolley guide rail and thus also causes the storage amount of the infinite material web 1 in the material web unwinding device to automatically or autonomously change.

[0071] In order to deflect the endless material web 1, in the region of the material web outlet 29 of the material web unwinder, a second deflecting roller 30 is rotatably mounted on the frame beam 9. A third deflecting roller 31 is arranged downstream of the second deflecting roller 30 with respect to the transport direction of the endless material web 1, which is likewise rotatably mounted on the storage trolley.

[0072] according to Figure 1 , the second material web roll 5 is active. The finite second material web 4 is unwound from the second material web roll 5 and thus conveyed. It will eventually be exhausted. The finite first material web is then bonded and unwound with the finite second material web 4 or the infinite material web 1 before exhaustion.

[0073] according to Figure 1 , the limited second material web 4 is guided to the cutting and connecting device via the second feed roller 21. The limited second material web is guided through between the preparation devices 24 and 25. In addition, the limited second material web is also guided through between the first preparation device 24 and the second connecting device 27. The limited second material web is also guided through between the second connecting device 27 and the first connecting device 26. The preparation devices 24, 25 and the connecting devices 26, 27 are currently essentially inactive.

[0074] After the cutting and joining device, the endless material web 1 is guided around a first deflecting roller 28. The endless material web is then guided around a second deflecting roller 30 and then around a third deflecting roller 31. The endless material web then runs to a material web outlet 29.

[0075] A limited first material web from a first material web roll 2 is currently held in a waiting position, for example by a cutting and connecting device, so that it can be connected to a limited second material web 4 to form an unlimited material web 1 when necessary. Figure 1 , the first unwinding device 3 is currently in an inactive state.

[0076] With this material web unwinding device, an unlimited material web 1 can be continuously supplied. The material web unwinding device can also be of different configurations. A material web unwinding device of this type is known, for example, from EP 3 231 750 A1 or the parallel US 2017 / 297849 A1, to which reference may be made for the specific structure, operation and detailed function.

[0077] As shown, below each first transfer arm 12, at the machine frame 6, for example, outside, a first safety device 32 is arranged, which is a component of the first area safety device. Therefore, the material web unwinding device includes a total of two first safety devices 32, which are arranged spaced apart from each other in the horizontal direction.

[0078] Under each second transfer arm 16, at the machine frame 6, for example outside, a second safety device 33 is arranged, which is a component of the second area safety device. Therefore, the material web unwinding device comprises a total of two second safety devices 33, which are arranged spaced apart from each other in the horizontal direction.

[0079] The first safety device 32 and the second safety device 33 are arranged in a fixed position at the bottom of the frame 6 , in particular at the frame base 7 and / or the frame column 8 thereof.

[0080] Each first safety device 32 is arranged adjacent to the first transfer arm 12 at the machine frame 6. For example, the two first safety devices 32 are arranged between the first transfer arms 12, or are arranged directly below these first transfer arms at the machine frame 6. These first safety devices are each oriented in a direction away from the second unwinding device 14.

[0081] Each second safety device 33 is arranged adjacent to the second transfer arm 16 at the frame 6. For example, the two second safety devices 33 are arranged between the second transfer arms 16, or are arranged directly below the second transfer arms at the frame 6. The second safety devices are each oriented in a direction away from the first unwinding device 3.

[0082] The first safety device 32 is arranged opposite to the second safety device 33 .

[0083] Each of the first safety device 32 and the second safety device 33 is in signal connection with the safety processing unit 34 at least at certain times, preferably continuously or always. Figure 2 ).

[0084] like Figure 5 As shown by way of example, the first safety device 32 can generate, in particular continuously generate, a rectangular first safety field 35 when in operation. The first safety field 35 spreads uniformly to both sides starting from the first corresponding first safety device 32 and extends parallel to the first pivot axis 13. The first safety field also extends perpendicularly to the first pivot axis 13 in a direction away from the material web unwinding device or the second unwinding device 14 over the adjacent first transfer arm 12. The first transfer arm 12 arranged adjacent to the first safety device 32 is at least partially, preferably at least mostly, located in the first safety field 35.

[0085] Furthermore, the first safety device 32 generates, in particular continuously generates, a second safety field 36 during operation, which second safety field has, for example, the shape of a right triangle and extends mostly laterally next to the first safety field 35. The second safety field 36 extends from the corresponding first safety device 32 laterally outwardly parallel to the first pivot axis 13 or in a direction away from the other first safety device 32. In addition, the second safety field extends perpendicularly to the first pivot axis 13 in a direction away from the material web unwinding device or the second unwinding device 14, just like the first safety field 35. As the distance of the second safety field 36 from the first safety device 32 along the first pivot axis 13 increases, the extension of the second safety field perpendicular to the first pivot axis 13 also increases. The second safety field 36 forms a laterally external safety field.

[0086] The first safety field 35 and the second safety field 36 extend, for example, with the same magnitude, starting from the corresponding first safety device 32 perpendicularly to the first pivot axis 13. They overlap in the vicinity of the corresponding first safety device 32.

[0087] Furthermore, the first safety device 32 is capable of generating, in particular continuously generating, a third safety field 37, which is again implemented as a rectangular triangle and extends from the first safety device 32 in the opposite direction compared to the second safety field 36. The third safety field extends from the corresponding first safety device 32 parallel to the first pivot axis 13 in the direction of the other first safety device 32 and preferably crosses the other first safety device and the first transfer arm 12 arranged there. As the distance of the third safety field 37 from the corresponding first safety device 32 along the first pivot axis 13 increases, the extension of the third safety field 37 perpendicular to the first pivot axis 13 also increases. The third safety field 37 detects the central area of ​​the first unwinding device 3 or the material web roll receiving area.

[0088] The maximum extension 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 extension of the first safety field 35 perpendicular to the first pivot axis 13 in a direction away from the corresponding first safety device 32 .

[0089] The first safety field 35 and the third safety field 37 overlap in the vicinity of the corresponding first safety device 32 .

[0090] The first safety field 35 is arranged approximately between the second safety field 36 and the third safety field 37 .

[0091] The first safety field 35 , the second safety field 36 and the third safety field 37 each have mutually flush base lines which extend in the vicinity of the first pivot axis 13 and parallel to the first pivot axis.

[0092] The safety zones 35 , 36 , 37 detect the first unwinding device 3 and processes such as the transport of the first material web roll 2 into the first unwinding device and the transport of the first material web roll 2 out of the first unwinding device.

[0093] The other first safety device 32 can, for example, generate corresponding safety fields 35, 36, 37, which here mainly cover different side areas of the material web unwinding device, thereby ensuring that a large area is protected in an improved manner. These safety fields 35, 36, 37 of the two first safety devices 32 jointly detect the first unwinding device 3 and, for example, the process of transporting the first material web roll 2 into the first unwinding device and the process of transporting the first material web roll 2 out of the first unwinding device. The two first safety devices 32 are preferably active when the material web unwinding device is in operation. The two first safety devices can be symmetrical to each other during operation. The safety fields 37 of these first safety devices 32 overlap. The safety fields 35, 36, 37 generated by the two first safety devices 32 can also be different from each other.

[0094] The second safety device 33 can also generate corresponding safety fields 35, 36, 37, which extend relative to the material web unwinding device opposite to the safety fields 35, 36, 37 generated by the first safety device 32. The safety fields 35, 36, 37 generated by the second safety device 33 detect the second unwinding device 14 and, for example, the process of transporting the second material web roll 5 into the second unwinding device and the process of transporting the second material web roll 5 out of the second unwinding device. The two second safety devices 33 are preferably active when the material web unwinding device is in operation. Advantageously, the first safety device 32 and the second safety device 33 are active at the same time. The second safety device 33 can also generate other safety fields. The safety fields 35, 36, 37 generated by the first safety device 32 and the second safety device 33 can be different from each other.

[0095] like Figure 6As shown, alternatively, the one first safety device 32 generates a plurality of (e.g., between two and six) first safety fields 35 when in operation, which are arranged laterally offset from each other parallel to the first pivot axis 13. These first safety fields 35 overlap to a large extent here. It generates a plurality of (e.g., between two and six) second safety fields 36 when in operation, which are arranged laterally offset from each other parallel to the first pivot axis 13. These second safety fields 36 overlap to a large extent here. The first safety device 32 also generates a plurality of (e.g., between two and six) third safety fields 37 when in operation, which are arranged laterally offset from each other parallel to the first pivot axis 13. These third safety fields 37 overlap to a large extent. These first safety fields 35 overlap the second safety field 36 and the third safety field 37 near the first safety device 32, respectively.

[0096] Another first safety device 32 can generate a corresponding safety field 35, 36, 37 or other safety fields. The second safety device 33 can also generate a corresponding safety field 35, 36, 37 or other safety fields.

[0097] according to Figure 7 , the two first safety devices 32 alternatively generate a common first safety field 38 when in operation. The safety sub-fields generated by the two first safety devices 32 merge with each other. The common first safety field 38 extends uniformly in the lateral direction beyond the two first safety devices 32 parallel to the first pivot axis 13 and detects the external area. In addition, the common first safety field extends perpendicularly to the first pivot axis 13 and across the first transfer arm 12 in a direction away from the second unwinding device 14. The common first safety field 38 has a basically elongated polygonal shape. The extension parallel to the first pivot axis 13 is significantly greater than the extension perpendicular to the first pivot axis. The common first safety field 38 has two parallel sides. In addition, the common first safety field also has an outer edge closed edge perpendicular to the side. The common first safety field 38 is symmetrical.

[0098] The second safety device 33 can generate a corresponding common second safety field 39 which extends from the second safety device 33 in a direction away from the first unwinding device 3 .

[0099] Figure 8 The following is an example of how the second material web roll 5 is brought in and how it is brought in from the side to the outside parallel to the second pivot axis 17. Figure 7The common second safety field 39 shown. The second material web roll 5 is here transported in by a transport trolley 40, which has a plurality of travel units, such as travel wheels, and at least one own mobile drive. The transport trolley 40 is unmanned or self-driving. The transport trolley is steerable. Preferably, the transport trolley travels between the material web unwinding device and the material web roll bearing. Advantageously, there are a large number of transport trolleys 40. These transport trolleys are preferably controllable or movable in different ways. Instead of the transport trolley 40, it is also possible, for example, to transport it in via a conveyor chain or a rail transport device or the like.

[0100] The operation of the material web unwinding device will be described below by taking the transport trolley 40 as an example.

[0101] The automatic operation of the material web unwinding device is started by operating the operating device, preferably once. The automatic operation continues automatically until the process of receiving the material web roll 2 or 5 into the corresponding receiving device 11 or 15 or the process of unloading the material web roll 2 or 5 from the corresponding receiving device 11 or 15 onto the transport trolley 40 is completed.

[0102] In automatic operation, for the process of receiving the material web roll 2 or 5 from the transport trolley 40 into the corresponding receiving device 11 or 15, the following steps are performed:

[0103] - By manually operating the operating device, for example by pressing the operating device, the process of transporting the corresponding material web roll 2 or 5 by means of the transport trolley 40 is started, preferably via a predetermined transport route or a predetermined side

[0104] - Moving the material web roll 2 or 5 on the transport trolley 40 to the receiving device 11 or 15

[0105] - when the material web roll 2 or 5 is in the center relative to the receiving device 11 or 15, the feeding of the material web roll 2 or 5 is stopped

[0106] - lowering the transfer arms 12 or 16 from their upper unwinding position to the lower material web roll changing position by means of corresponding transfer devices, provided that they are not already in the material web roll changing position

[0107] - After the transfer arm 12 or 16 has reached the material web roll change position, tensioning the material web roll 2 or 5

[0108] - tensioning the material web roll 2 or 5 until it is reliably detected that the material web roll 2 or 5 is tensioned

[0109] - Transferring the material web roll 2 or 5 from the transport carriage 40 upwards to its unwinding position by means of a corresponding transfer device

[0110] - Centering of the material web roll 2 or 5; preferably monitoring the tension of the corresponding material web roll 2 or 5

[0111] - The process of receiving the material web roll 2 or 5 by the receiving device 11 or 15 is completed and the automatic operation is stopped

[0112] After receiving, the transport trolley 40 leaves the area below the received material web roll 2 or 5. The web start of the material web roll 2 or 5 can be manually or automatically inserted into the material web unwinding device.

[0113] Individual steps may be omitted. For another transport device, the indicated steps are performed (substantially) in a similar manner.

[0114] In automatic operation, the following steps are performed for the process of unloading the material web roll 2 or 5 from the corresponding receiving device 11 or 15 onto the transport trolley 40:

[0115] - By manually operating the operating device, for example by pressing, the empty transport trolley 40 is triggered to move towards the receiving device 11 or 15 in order to transport the corresponding material web roll 2 or 5 (for example, a residual roll of the material web or an empty roll); the transport trolley 40 is aligned with the center of the receiving device

[0116] - unloading the material web roll 2 or 5 onto the transport trolley 40 by lowering the material web roll by means of a corresponding transfer device; in this case the transfer arm 12 or 16 is transferred downwards from the unwinding position to the material web roll changing position

[0117] - when it is ensured that the material web roll 2 or 5 is securely placed on the transport trolley 40, it is released

[0118] - transporting the material web roll 2 or 5 from the material web unwinding device via a pre-set transport route or a predetermined side

[0119] - Then end the automatic operation

[0120] Individual steps may be omitted. For another transport device, the indicated steps are performed (substantially) in a similar manner.

[0121] In fully automatic operation, the following steps are performed for the process of receiving the material web roll 2 or 5 from the transport trolley 40 into the corresponding receiving device 11 or 15:

[0122] - the material web unwinding device sends a signal, for example to a higher-level processing unit, that it is ready to receive the material web roll 2 or 5

[0123] - The transport trolley 40 automatically moves the material web roll 2 or 5 to the center of the unwinding device 3 or 14

[0124] In other respects, fully automatic operation is essentially the same as automatic operation. For another transport device, the indicated steps are performed (essentially) in a similar manner.

[0125] In fully automatic operation, the following steps are performed for the process of unloading the material web roll 2 or 5 from the receiving device 11 or 15 to the transport trolley 40:

[0126] - the material web unwinding device signals, for example to a higher-level processing unit, that it is ready to unload the material web roll 2 or 5; thus requesting an empty transport trolley 40

[0127] - when the transport trolley 40 is in the center of the material web unwinding device or the corresponding unwinding device 3 or 14, this is communicated

[0128] - Unloading the material web roll 2 or 5 respectively onto the transport trolley 40

[0129] Fully automatic operation is similar to automatic operation in unloading material webs, and reference is made to its description. After unloading the material web roll 2 or 5 onto the transport trolley 40, the material web unwinding device sends a signal indicating that the transport trolley 40 can transport the material web roll 2 or 5 out, and the transport trolley then performs this operation.

[0130] For another transport device, the indicated steps are performed (substantially) in a similar manner.

[0131] It is possible to switch between individual operations.

[0132] The operation of the material web unwinding device with active zone safety device when a material web roll 2 or 5 is received into the receiving device 11 or 15, respectively, will be described below.

[0133] If according to Figure 7 and Figure 8 The first area safety device and the second area safety device shown only generate a common safety field 38 or 39, so there is a simple safety monitoring. The first area safety device and the second area safety device can detect people, material rolls 2 or 5, transport trolleys 40 and other objects in the danger zone and, if appropriate, stop or slow down dangerous movements in the danger zone. This applies to the transport of material web rolls 2, 5, the transport of material web rolls 2, 5 and the operation of the material web unwinding device.

[0134] If the first area safety device or the second area safety device is operated according to Figure 5 , Figure 6If a plurality of safety fields 35, 36, 37 are generated, the safety fields 35 to 37 must be interrupted successively by the transport trolley 40 or the material web roll 2 or 5 in a predetermined precise order or sequence when the material web roll 2 or 5 is transported in. If an error or an abnormal situation occurs in the sequence, an error signal is output to the safety processing unit 34. Such an abnormal situation can be caused, for example, by a person who is in the safety field 35, 36 or 37. It is expedient to perform a plausibility check when the safety field 35, 36, 37 is interrupted. After interrupting one of the safety fields 35 to 37, at least one other safety field must be interrupted within a predetermined or pre-known cycle or time period. If this is not the case, it can be determined that this is not a correct material web roll transport. By means of logic, it can be determined whether this is a moving material web roll 2 or 5, or additionally whether the safety field 35, 36, 37 is interrupted by a person or other object instead of a material web roll 2, 5. If appropriate, the dangerous movement in the danger zone is stopped or slowed down. This safety monitoring is more complex than the simple safety monitoring described above, and the effect is also better.

[0135] Reception can be resumed, for example, via a corresponding manual release.

[0136] The removal of the material web roll 2 or 5 is essentially monitored or protected in a similar manner.

[0137] The material web unwinding device can also be used in other fields besides corrugated board production. For example, the device can be used in the printing industry and can unwind a printing web. The device can also be used, for example, in the field of gypsum board production and stamping.

Claims

1. A material web unwinding device, a) having a frame (6), b) having a first unwinding device (3) arranged at the frame (6) for unwinding a limited first material web from a first material web roll (2), wherein the first unwinding device (3) has i) a first receiving device (11) for receiving the first material web roll (2), and ii) a first transfer device for transferring the first receiving device (11) between a reel-out position and a material web reel changing position, and c) having a first area safety device including at least one first safety device (32) for protecting, at least in certain areas, a material web roll transporting area for transporting the first material web roll (2) into the first unwinding device (3), a material web roll transporting area for transporting the first material web roll (2) out of the first unwinding device (3) and / or a working area of ​​the first unwinding device (3).

2. The material web unwinding device according to claim 1, characterized in that Each first safety device (32) is capable of generating at least two, preferably two to ten different safety fields (35, 36, 37) for detecting abnormal situations.

3. The material web unwinding device according to claim 2, characterized in that The safety fields (35, 36, 37) are at least partially adjacent to each other during operation.

4. The material web unwinding device according to claim 2 or 3, characterized in that The safety fields (35, 36, 37) overlap each other in certain areas during operation.

5. The material web unwinding device according to any one of claims 2 to 4, characterized in that The safety fields (35, 36, 37) have different shapes and / or sizes during operation.

6. The material web unwinding device according to any one of claims 2 to 5, characterized in that The safety fields (35, 36, 37) extend in different directions starting from the respective first safety device (32) during actuation.

7. The material web unwinding device according to any one of claims 2 to 6, characterized in that When an abnormal situation is detected when the safety field (35, 36, 37) is interrupted, the first area safety device outputs an error signal.

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

9. The material web unwinding device according to claim 8, characterized in that The at least one first safety device (32) is arranged at the bottom of the frame (6).

10. The material web unwinding device according to claim 8 or 9, characterized in that The at least one first safety device (32) is arranged below the first transfer device.

11. An apparatus, in particular a corrugated board apparatus, a) having at least one material web unwinding device according to any one of the preceding claims, and b) having at least one transport device (40) for transporting the first material web roll (2) into the first unwinding device (3) and / or transporting the first material web roll (2) out of the first unwinding device (3).

12. The device according to claim 11, characterized in that A safety processing unit (34), the safety processing unit being in signal connection with the following devices at least at certain times: - said at least one first safety device (32) for receiving a zone signal, and - the at least one transport device (40) is used to stop or slow down the at least one transport device when appropriate to avoid accidents, and / or the first unwinding device (3) is used to stop or slow down the first unwinding device when appropriate at least at some time to avoid accidents.

13. A method comprising the steps of: - by means of a first area safety device comprising at least one first safety device (32), a material web roll infeed area for conveying a first material web roll (2) into a first unwinding device (3) arranged at a frame (6) so as to unwind a limited first material web from the first material web roll (2), a material web roll outfeed area for conveying the first material web roll (2) out of the first unwinding device (3) and / or a working area of ​​the first unwinding device (3) are protected at least in certain areas, wherein the first unwinding device (3) has a first receiving device (11) for receiving the first material web roll (2), and a first transfer device, used to transfer the first receiving device (11) between a reel-out position and a material web roll replacement position.

14. The method according to claim 13, characterized in that Upon identifying an abnormal situation when the safety field (35, 36, 37) of the first area safety device is interrupted, the safety processing unit (34) outputs an error signal, and preferably - at least one transport device (40) for transporting the first material web roll (2) into the first unwinding device (3) and / or for transporting the first material web roll (2) out of the first unwinding device (3) is stopped or slowed down when appropriate, and / or the process of receiving the first material web roll (2) by the first receiving device (11) is stopped or slowed down at least at some time, and / or the process of unloading the first material web roll (3) from the first receiving device (11) to the at least one transport device (40) is stopped or slowed down at least at some time.

15. The method according to claim 14, characterized in that The safety processing unit (34) monitors the interrupt sequence of the safety field (35, 36, 37).

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