Cutting device for piles of sheets with a supporting element

Abstract

The invention relates to a stack cutting apparatus (01) having a cutting device (13) for cutting a stack of sheets (26) and a front support device (11) with a front stack support surface (04), a rear support device (68) with a rear stack support surface (69), and a cutting gap (76) arranged therebetween, wherein a table plane (E) contains this front stack support surface (04) and wherein the cutting device (13) has a movable upper blade (18), a lower blade (77) with cutting edge (81), and a cutting aid (23) for fixing stacks of sheets (26), which cutting aid can be moved vertically and is arranged in front of the upper blade (18) along a transport path provided for transporting stacks of sheets (26), and wherein the cutting device (13) has a movable support element (78) that has a contact surface (79) provided for supporting sheets (71) and can be moved between a support position and a discharge position, and wherein the contact surface (79) is arranged in and / or below the table plane (E) when the support element (78) is in the support position, and wherein the contact surface (79) is arranged closer to a cutting edge (81) when the support element (78) is in the support position than when the support element (78) is in the discharge position.

Description

[0001] The invention relates to a stack cutting device with a support element.

[0002] Stack cutting devices are known which have a lowerable upper blade and a stationary lower blade. These are used to separate stacks of blanks from stacks of sheets. A cutting edge of the upper blade must be lowered at least a little way below a cutting edge of the lower blade so that the cutting process can be carried out completely. Particularly when edge trimming is carried out, it can happen that the part of the bottom sheet which protrudes beyond the lower blade is bent downwards. If the cutting edge of the upper blade is then guided past the cutting edge of the lower blade, the bottom sheet can be folded over around the cutting edge of the lower blade, especially in the case of thin sheets. This can result in the bottom sheet not being cut cleanly, but rather, for example, only a layer of it being scraped off.Then a part that should actually be separated remains on the bottom sheet and causes problems during further processing.

[0003] EP 1 018 408 A1 discloses a stack cutting device with a cutting device having a ruler pivotable about an axis, by means of which a separated stack of blanks can be held in shape laterally when it is erected after a cutting process.

[0004] DE 10 2009 053 975 A1 discloses a stack cutting device which has a movable protective element which, on the one hand, is intended to prevent cut paper strips from reaching a front table and, on the other hand, can be used to push partial stacks onto the front table after cutting.

[0005] DD 62 300 B1 discloses a stack cutting device in which a stack of sheets is transported across a cutting gap and cut by an upper blade located behind the cutting gap and interacting with a cutting bar. A pivoting bridge element is arranged in the cutting gap.

[0006] DE 38 29 682 A1 discloses a device for cutting stacks of books. This device comprises a cutting bar that interacts with an upper blade located behind a cutting gap. A pivoting bridge element is arranged in the cutting gap.

[0007] FR 1 150 136 A discloses a stack cutting device featuring an upper blade that interacts with a cutting bar. In the area after the blade, the stack support surface can be folded down to create a gap through which waste pieces can be disposed of.

[0008] US Pat. Nos. 3,913,750 A and 3,146,650 A each disclose a device for cutting books. It comprises an upper blade and a lower blade with a cutting edge. The blade is positioned after a gap in the transport direction. The gap can be covered by a pivoting bridge element.

[0009] DE 33 02 946 A1 and DE 35 13 418 A1 each disclose a device for cutting books. The device has an upper blade that interacts with a cutting bar. The blade is arranged at the rear end of a cutting gap. A bridge element is provided for transporting the books across the cutting gap.

[0010] WO 91 / 00 168 A1 and US 2007 / 0 227 323 A1 each disclose a device for cutting stacks of sheets. The device has an upper blade that interacts with a cutting bar. According to WO 91 / 00 168 A1, the cut material is transported away using a linearly movable table. US 2007 / 0 227 323 A1 has a bridge element that must be open during cutting to transport the cut material away.

[0011] EP 1 129 972 A2 discloses a device for cutting the edges of books.

[0012] The invention is based on the object of creating a stack cutting device with a support element.

[0013] The object is achieved according to the invention by the features of claim 1.

[0014] A stack cutting device has at least one, in particular first, cutting device for cutting at least one stack of sheets, in particular a cutting device for cutting stacks of sheets into stacks of blanks. The stack cutting device has at least one first front support device with a first front stack support surface. A first, at least temporarily horizontal, table plane contains this first front stack support surface at least partially and preferably completely. The, in particular first, stack cutting device preferably has at least one first rear support device with a first rear stack support surface. A cutting gap is preferably arranged between the first front stack support surface and the first rear stack support surface. The, in particular first, stack cutting device has at least one movable upper blade and at least one, in particular stationary, lower blade.The lower blade preferably has a cutting edge. The first cutting device preferably has at least one first cutting aid for securing sheet stacks, which is arranged to be movable at least with respect to a vertical direction and which is arranged in front of the first upper blade along a transport path provided for transporting sheet stacks and / or intermediate stacks and / or stacks of blanks. The in particular first stack cutting device has at least one movable support element which has at least one contact surface provided for supporting sheets, in particular from below, and which is arranged to be movable, for example switchable, in particular pivotable, at least between a support position and at least one first disposal position. The at least one contact surface of the support element is arranged in and / or below the first table plane when the support element is arranged in the support position.When the support element is arranged in the support position, the at least one contact surface of the support element is arranged closer to a particularly stationary and / or lower cutting edge of the lower blade than when the support element is arranged in the disposal position. This offers the advantage that even a very short end of a bottommost sheet in the stack can be supported from below in order to prevent this end from bending over when the upper blade is lowered and only being partially scraped off instead of being cleanly severed. In addition, it can be ensured that the end of the sheet does not inadvertently get into a gap during the feed, which is necessary to make room for the upper blade. When the support element is arranged in the disposal position, the at least one contact surface of the support element is preferably arranged at least partially and more preferably completely below the first table level.

[0015] In a further development, the stack cutting device is characterized by the support element being pivotable about a switching axis. This offers the advantage of a relatively simple movement and requires only a small amount of installation space.

[0016] In an alternative or additional development, the stack cutting device is preferably characterized in that the first cutting device has at least one bridge element, which is in particular different from the support element and is movable between at least one transfer position and at least one interruption position. The bridge element preferably has at least one support surface. It is preferred that, when the bridge element is arranged in the transfer position, its support surface preferably lies completely in the first table plane and / or has a vertical normal vector. When the bridge element is arranged in the interruption position, its support surface preferably lies at least 50%, more preferably at least 75%, even more preferably at least 95%, and even more preferably at least 99% outside the first table plane and / or has a normal vector that deviates from a vertical direction.This offers the advantage that even those components of the sheet stack that are to be separated and further processed can be properly transferred to the next support surface and the advantages of the support element are still maintained.

[0017] In an alternative or additional development, the stack cutting device is preferably characterized in that the at least one bridge element is arranged to pivot about a pivot axis. This offers the advantage that a relatively simple movement is carried out and only a small installation space is required. In an alternative or additional development, the stack cutting device is preferably characterized in that the at least one support element and the at least one bridge element are rigidly connected to one another and / or are pivotable together about the switching axis. This offers the advantage that only one drive system is required to execute both movements.

[0018] In an alternative or additional development, the stack cutting device is preferably characterized in that the first cutting device has at least one shielding element which is movable between at least one shielding position and at least one release position. When the shielding element is arranged in its shielding position, the shielding element is preferably arranged at least partially above the first table level. When the shielding element is arranged in its release position, the shielding element is preferably arranged completely below the first table level. This offers the advantage that waste pieces only occur in areas provided for them. The at least one shielding element is preferably arranged rigidly relative to the at least one support element and / or rigidly to the at least one bridge element. In this case, a common drive can again be used.

[0019] In an alternative or additional development, the stack cutting device is preferably characterized in that a surface normal of the contact surface of the support element forms an angle with a surface normal of the support surface of the bridge element, which angle is at least 30°, more preferably at least 45°, even more preferably at least 60°, and even more preferably at least 80°, and which is at most 150°, more preferably at most 135°, even more preferably at most 120°, and even more preferably at most 100°. This offers the advantage that, depending on the pivoting position, the support element or the contact element is used, and the other does not obstruct any path.

[0020] The at least one support element is arranged, at least in its supporting position, and preferably always in particular along a transport path intended for sheet stacks, between the first front stack support surface and the first rear stack support surface. This requires only a small amount of installation space.

[0021] In an alternative or additional development, the stack cutting device is preferably characterized in that the first stack cutting device has at least one lowerable cutting aid for pressing a portion of a respective sheet stack against the first front stack support surface and / or in that the first stack cutting device has at least one lowerable hold-down device for pressing a portion of a respective sheet stack, in particular a portion to be separated, against the first rear stack support surface. This enables a particularly clean cut.

[0022] In an alternative or additional development, the stack cutting device is preferably characterized by a guide surface arranged below the upper blade for influencing the fall path of separated stack components. This allows waste pieces to be transported particularly easily along a designated path, for example, into a waste container.

[0023] An embodiment of the invention is illustrated in the drawings and is described in more detail below.

[0024] They show: Fig. 1 is a schematic representation of a stack cutting device in a plan view; Fig. 2 is a schematic representation of a first cutting device in a side view, wherein a switching device is arranged in a run-in state and a support element is arranged in a run-in position and a bridge element is arranged in an interruption position and a shielding element is arranged in a shielding position and an edge region of a sheet stack protrudes beyond a lower knife; Fig. 3 is a schematic representation according to Fig. 2 , wherein the switching device is arranged in a supporting state and the support element is arranged in its supporting position and the bridge element is arranged in an interruption position and the shielding element is arranged in a shielding position; Fig. 4 a schematic representation according to Fig. 3 , with an upper blade lowered; Fig. 5 a schematic representation according to Fig. 2 , wherein the switching device is arranged in a transfer state and the support element is arranged in its first disposal position and the bridge element is arranged in its transfer position and the shielding element is arranged in a release position; Fig. 6 a schematic representation according to Fig. 2 , wherein the switching device is arranged in a disposal state and the support element is arranged in its second disposal position and the bridge element is arranged in an interruption position and the shielding element is arranged in a release position; Fig. 7 a schematic representation according to Fig. 5 , with the upper knife raised and the sheet stack pushed further forward; Fig. 8 a schematic representation according to Fig. 5 , whereby the sheet stack was advanced further; Fig. 9 a schematic representation of a second cutting device in a side view.

[0025] A stack cutting device 01 for cutting sheet stacks 26 into stacks of documents 27, in particular stacks of securities 27, preferably has at least one, in particular, first cutting device 13, which is also referred to as a, in particular, first stack cutting device 13. The first cutting device 13 is preferably designed as a first cutting device 13 for cutting at least one sheet stack 26, in particular for cutting sheet stacks 26 into stacks of documents 27. Preferably, in addition to the first cutting device 13, the stack cutting device 01 has at least one second cutting device 14, which is also referred to as a, in particular, second stack cutting device 14. By arranging a plurality of cutting devices 13; 14, unnecessary multiple pivoting of the corresponding stacks can be avoided and the throughput can be increased.

[0026] The first cutting device 13 preferably has at least one first knife bar 16, on which a first knife 18, referred to as the first upper knife 18, is arranged. The first upper knife 18 preferably has a first upper cutting edge 21, which is preferably designed as a linear cutting edge 21. A respective cutting edge 21; 22; 81 is preferably a straight line, in particular, at which two surfaces of a corresponding knife 18; 19; 77 meet and which is designed to separate or sever material. The first knife bar 16 is preferably arranged to be movable along a preferably linear and more preferably exclusively linear first travel path, in particular in and / or counter to a first travel direction A1.

[0027] The stack cutting device 01 has at least one first front support device 11 with a first front stack support surface 04. This is assigned in particular to the first cutting device 13. The first front support device 11 is also referred to as the first front table 11. A first table plane E contains this first front stack support surface 04, preferably completely, at least insofar as this stack support surface 04 is flat. This is to be distinguished from an imaginary plane that merely intersects the stack support surface 04, i.e. has only one cutting line in common with it. The first table plane E is preferably oriented horizontally at least temporarily, in particular at least during cutting processes, and more preferably permanently. The first front stack support surface 04 serves in particular to support a stack of sheets 26 to be cut before a respective cutting process and / or during a respective cutting process.The first stack cutting device 13 has at least one movable first upper blade 18 and at least one blade 77, in particular a stationary one, designed as a first lower blade 77. The first lower blade 77 preferably has a cutting edge 81, which is referred to as the lower cutting edge 81. For example, at least a part of the first lower blade 77 forms a part and / or a continuation of the first front stack support surface 04. For example, the cutting edge 81 of the first lower blade 77 forms a boundary of the first front stack support surface 04 and / or the cutting edge 81 of the first lower blade 77 is arranged in front of the cutting gap 76 with respect to the transport path provided for sheet stacks 26.

[0028] The stack cutting device 01 preferably has at least one first rear support device 68 with a first rear stack support surface 69. The first rear stack support surface 69 serves to support at least one respective severed intermediate stack 28 or blank stack 27. A cutting gap 76 is preferably arranged between the first front stack support surface 04 and the first rear stack support surface 69. This cutting gap 76 extends along the transport path provided for sheet stacks 26, for example, over at least 2 cm, preferably at least 4 cm and more preferably at least 6 cm and independently thereof, for example, over a maximum of 20 cm, more preferably a maximum of 10 cm and even more preferably a maximum of 8 cm.This cutting gap 76 serves, in particular, to allow the first upper blade 18 to be inserted below the first table level E and / or to accommodate at least one support element 78 and / or at least one bridge element 83 and / or at least one shielding element 86 and / or at least one switching device 89 and / or to transport away waste pieces 91. Preferably, the first table level E contains this rear stack support surface 69 at least partially and, in particular, completely. Then, sheet stacks 26 can lie flat for cutting.

[0029] The first stack cutting device 13 has at least one movable support element 78, which has at least one contact surface 79, which is provided for supporting sheets 71, in particular from below. The at least one support element 78 is arranged so as to be movable, in particular switchable and preferably pivotable, at least between a support position and at least one first disposal position. The contact surface 79 is preferably designed at least partially as a flat contact surface 79. The at least one contact surface 79 of the support element 78 is arranged in and / or below the first table plane E, at least when the support element 78 is arranged in the support position. In particular, when the support element 78 is arranged in the support position, preferably no component of the contact surface 79 of the support element 78 is arranged above the table plane E.The at least one contact surface 79 of the support element 78 is arranged closer to the particularly stationary cutting edge 81 of the lower blade 77 when the support element 78 is arranged in the support position than when the support element 78 is arranged in the disposal position. In this case, the smallest possible distance is the one to be considered. Preferably, the at least one contact surface 79 of the support element 78 is arranged at least partially, and more preferably completely, below the first table plane E when the support element 78 is arranged in the disposal position.

[0030] For example, the at least one support element 78 is arranged pivotably about a switching axis 82, in particular to switch between different positions. Such positions are, for example, an inlet position and / or the support position and / or the first disposal position and / or a second disposal position.

[0031] The inlet position of the support element 78 serves in particular to be able to position an edge region 92 of a sheet stack 26 to be cut off relative to the lower blade 77 and / or the upper blade 18 of the first cutting device 13 such that edge trimming can then take place. The support element 78 should have a distance from the lower blade 77 during the edge trimming process so that the cutting edge 21 of the upper blade 19 can be moved, in particular lowered, at least a short distance below the cutting edge 81 of the lower blade 77 and / or below the first table plane E. This results in a gap which makes up part of the cutting gap 76. The gap extends along the transport path provided for the sheet stack 26, for example, over at least 2 mm and preferably at least 4 mm and independently thereof, for example, over a maximum of 20 mm, more preferably a maximum of 10 mm and even more preferably a maximum of 8 mm.However, this gap must be passed by the edge region 92 of the sheet stack 26 when positioning it. This would entail the risk that at least the edge of the bottommost sheet 71 would slip into the gap and thus not be able to be supported by the support element 78. Therefore, the support element 78 is first positioned in the infeed position, then the sheet stack 26 is positioned relative to the lower blade 77 and / or the upper blade 18 of the first cutting device 13, and then the support element 78 is moved into the support position, in particular raised and / or pivoted. If necessary, a portion of the sheets 71 of the sheet stack 26 to be cut is lifted in the process. Preferably, the at least one contact surface 79 of the at least one support element 78 is arranged below the first table plane E and closer to the cutting edge 81 of the lower blade 77 when the support element 78 is arranged in the infeed position than when the support element 78 is arranged in the disposal position.Preferably, the at least one contact surface 79 of the at least one support element 78 is arranged closer to the cutting edge 81 of the lower blade 77 when the support element 78 is arranged in the support position than when the support element 78 is arranged in the run-in position. (The support element 78 is shown by way of example in . Fig. 2 shown in its entry position.)

[0032] The support position of the support element 78 serves in particular to support at least the bottommost sheet 71 of a sheet stack during an edge trimming process and thereby to prevent this sheet 71 from being cut incompletely. For this purpose, the contact surface 79 of the support element 78 arranged in the support position is preferably contained in the first table plane E or arranged only slightly deviating therefrom. (The support element 78 is shown by way of example in Fig. 3 shown in its supporting position.)

[0033] The first disposal position of the support element 78 serves in particular to dispose of waste pieces 91, in particular cut-off edge pieces of the sheet stack 26, which are too small to be processed further. For this purpose, the support element 78 is preferably brought into the first disposal position, in which its contact surface 79 is arranged substantially entirely outside the first table plane E. Preferably, the contact surface 79 of the support element 78 is arranged obliquely in the first disposal position. As a result, these cut-off edge pieces preferably slide off the support element 78. For example, this is already sufficient for removal. Otherwise, the support element 78 can be moved further, in particular into the second disposal position, for example to create more space or to widen a bottleneck. The second disposal position of the support element 78 therefore serves in particular to ensure the safe removal of the cut-off edge pieces of the sheet stack 26.(The support element 78 is shown as an example in . Fig. 5 shown in its first disposal position.) (The support element 78 is shown as an example in Fig. 6 shown in its second disposal situation.)

[0034] The switching axis 82 is preferably oriented horizontally. The switching axis 82 preferably extends in a transverse direction A. The transverse direction A is preferably the direction A parallel to which the cutting edge 81 of the lower blade 77 extends. The switching axis 82 is preferably located below the table plane E. For example, the switching axis 82 is located in the cutting gap 76 and / or along a transport path provided for sheet stacks 26 after the first front stack support surface 04, in particular between the first front stack support surface 04 and the first rear stack support surface 69, more preferably closer to the first rear stack support surface 69 than to the first front stack support surface 04. Preferably, at least one pivot drive is arranged for pivoting the at least one support element 78.The at least one pivot drive is designed, for example, as an electric motor and / or as a linear motor and / or as a pneumatic drive and / or as a hydraulic drive. In a preferred embodiment, the at least one pivot drive is designed as a pair of pneumatic cylinders arranged in series. A first pneumatic cylinder, with its components movable relative to one another, is therefore fastened, on the one hand, to a frame-fixed component of the cutting device and, on the other hand, to a second pneumatic cylinder. The second pneumatic cylinder, with its components movable relative to one another, is fastened, on the one hand, to the first pneumatic cylinder and, on the other hand, to a pivotable component which is the support element 78 or is rigidly connected to the support element 78.By appropriately controlling the respective two end positions of the two pneumatic cylinders, four positions of the support element can then be realized, in particular the inlet position, the support position, the first disposal position and the second disposal position.

[0035] In an alternative or additional development, the stack cutting device 01 is preferably characterized in that the first cutting device 13 has at least one bridge element 83, which is movable, in particular switchable and, for example, pivotable, between at least one transfer position and at least one interruption position. The bridge element 83 preferably has at least one support surface 84. When the bridge element 83 is arranged in the transfer position, its support surface 84 lies in the first table plane E, preferably completely, and / or its support surface 84 has a vertical normal vector N84.When the bridge element 83 is arranged in the interrupted position, its support surface 84 lies at least 50%, preferably at least 75%, more preferably at least 95%, and even more preferably at least 99% outside the first table plane E and / or its support surface 84 has a normal vector N84 that deviates from a vertical direction V. For example, the at least one bridge element 83 is arranged to be pivotable about a pivot axis 82, in particular in order to be switched between different positions. Such positions are, for example, the transfer position and the at least one interrupted position. This pivot axis 82 is preferably the switching axis 82. The transfer position of the bridge element 83 serves in particular to reliably guide a leading end of a sheet stack 26, from which a part intended for further processing as an intermediate stack 28 or a blank stack 27 is to be cut off, to the second stack support surface 69.For this purpose, the surface normal N84 of the support surface 84 of the bridge element 83 is preferably oriented vertically in its transfer position and / or the support surface 84 of the bridge element 83 is preferably contained in the first table plane E in its transfer position. The at least one interrupted position of the bridge element 83 serves in particular to enable an adjustment of the position of the support element 78 and / or to create space for movements or repositioning of the support element 78. For example, the bridge element 83 can be arranged in several different interrupted positions. Preferably, the cutting gap 76 can be at least partially covered by the bridge element 83. Preferably, the cutting gap 76 can be at least partially covered by the support element 78. Preferably, the cutting gap 76 can be covered at any given time only by either the bridge element 83 or the support element 78 or by neither.

[0036] In an alternative or additional development, the stack cutting device 01 is preferably characterized in that the at least one support element 78 and the at least one bridge element 83 are rigidly connected to one another. Preferably, the at least one support element 78 and the at least one bridge element 83 are arranged jointly so as to be pivotable about the switching axis 82. Preferably, a surface normal N79 of the contact surface 79 of the support element 78 forms an angle W with a surface normal N84 of the support surface 84 of the bridge element 83. This angle W is preferably at least 30°, more preferably at least 45°, even more preferably at least 60°, and even more preferably at least 80°. Preferably, the angle W is at most 150°, more preferably at most 135°, even more preferably at most 120°, and even more preferably at most 100°.

[0037] In an alternative or additional development, the stack cutting device 01 is preferably characterized in that the first cutting device 13 has at least one shielding element 86 which is movable, in particular switchable, for example pivotable, between at least one shielding position and at least one release position. When the shielding element 86 is arranged in its shielding position, the shielding element 86 is preferably arranged at least partially above the first table plane E. When the shielding element 86 is arranged in its release position, the shielding element 86 is preferably arranged completely below the first table plane E. The shielding position of the shielding element 86 serves in particular to prevent waste pieces 91, in particular individual components of cut-off edge regions 92 of a cut sheet stack 26, from being thrown onto the second stack support surface 69, for example during cutting.Preferably, the at least one shielding element 86 is arranged rigidly relative to the at least one support element 78 and / or rigidly relative to the at least one bridge element 83. Preferably, the at least one shielding element 86 is also arranged pivotably about the switching axis 82. The release position of the shielding element 86 serves in particular to enable a stack of sheets 26 to be fed up to the second stack support surface 69. For example, the at least one shielding element 86 has at least one ramp surface 88 and / or the at least one shielding element 86 serves as a ramp element 86 in at least one release position, in particular to facilitate the feed of a respective stack of sheets 26 over the cutting gap 76. This special release position of the shielding element 86 is then referred to, for example, as a ramp position.The ramp position of the shielding element 86 as a special release position of the shielding element 86 serves in particular to ensure that a possibly dangling leading end of the sheet stack 26 is brought back to the height of the first table level E when it is fed in the direction of the second stack support surface 69.

[0038] According to the invention, the at least one support element 78 is arranged at least in its support position and preferably always between the first front stack support surface 04 and the first rear stack support surface 69, in particular along a transport path provided for sheet stacks 26.

[0039] In an alternative or additional development, the stack cutting device 01 is preferably characterized in that at least one switching device 89 is arranged, which comprises the at least one support element 78 and the at least one bridge element 83. More preferably, the at least one switching device 89 also comprises the at least one shielding element 86. The at least one switching device 89 has, for example, a base body 91, relative to which the at least one support element 78 and the at least one bridge element 83 and more preferably also the at least one shielding element 86 are rigidly arranged and / or to which the at least one support element 78 and the at least one bridge element 83 and more preferably also the at least one shielding element 86 are fastened. The at least one switching device 89 and in particular its base body 91 is preferably arranged so as to be pivotable about the switching axis 82.

[0040] For example, the switching device 89 is switchable between at least four or exactly four states. A first such state is a running-in state. Preferably, the support element 78 is arranged in its running-in position when the switching device 89 is arranged in the running-in state. Preferably, the bridge element 83 is arranged in an interrupted position when the switching device 89 is arranged in the running-in state. Preferably, the shielding element 86 is arranged in a shielding position when the switching device 89 is arranged in the running-in state. (For example, a switching device in the running-in state is in Fig. 2 shown.) A second such state is a supporting state. The supporting element 78 is preferably arranged in its supporting position when the switching device 89 is arranged in the supporting state. The bridging element 83 is preferably arranged in an interrupted position when the switching device 89 is arranged in the supporting state. The shielding element 86 is preferably arranged in a shielding position when the switching device 89 is arranged in the supporting state. (By way of example, a switching device in the supporting state is in Fig. 3 and Fig. 4 shown.) A third such state is a transfer state. Preferably, the support element 78 is arranged in its first disposal position when the switching device 89 is arranged in the transfer state. Preferably, the bridge element 83 is arranged in its transfer position when the switching device 89 is arranged in the transfer state. Preferably, the shielding element 86 is arranged in a release position, in particular in a ramp position, when the switching device 89 is arranged in the run-in state. (By way of example, a switching device in the transfer state is in Fig. 5 , Fig. 7 and Fig. 8 shown.) A fourth such state is a disposal state. Preferably, the support element 78 is arranged in its particular second disposal position when the switching device 89 is arranged in the disposal state. Preferably, the bridge element 83 is arranged in an interruption position when the switching device 89 is arranged in the disposal state. Preferably, the shielding element 86 is arranged in a release position when the switching device 89 is arranged in the disposal state. (By way of example, a switching device in the disposal state is in Fig. 6 shown.)

[0041] In an alternative or preferred embodiment, the stack cutting device 01 is preferably characterized in that a guide surface 87 is arranged below the upper blade 18 to influence the falling path of separated stack components or waste pieces 91. These can thus be guided to a disposal facility, for example, a waste container or a means of transport, after they have slid off the contact surface 79 of the support device 78 following the force of gravity.

[0042] In an alternative or additional development, the stack cutting device 01 is preferably characterized in that the first stack cutting device 13 has at least one lowerable cutting aid 23 for pressing a part of a respective sheet stack 26 against the first front stack support surface 04 and / or that the first stack cutting device 13 has at least one lowerable hold-down device 52 for pressing a part of a respective sheet stack 26, in particular to be separated, against the first rear stack support surface 69.In particular, the first cutting device 13 is preferably characterized in that the first cutting device 13 has at least one first cutting aid 23, in particular a first pressure bar 23 for fixing sheet stacks 26 and / or intermediate stacks 28 and / or blank stacks 27, which is arranged to be movable at least with respect to a vertical direction V and which is arranged in front of the first upper blade 18 along a transport path provided for transporting sheet stacks 26 and / or intermediate stacks 28 and / or blank stacks 27. Preferably, maximum contact pressures of between 0.5 N / mm 2 (half a Newton per square millimeter) and 2 N / mm 2 (two Newton per square millimeter) are exerted with the first cutting aid 23. This ensures that no layers are shifted against one another during cutting and that all layers are cut cleanly.For example, at least one first hold-down device 52 is arranged along the intended transport path after the first upper blade 18, which holds-down device 52 serves in particular to prevent cut-off components from jumping away in an uncontrolled manner.

[0043] In an alternative or additional development, the first cutting device 13 is preferably characterized in that the first cutting device 13 has at least one first cutting drive M1 for moving the first cutter bar 16 in and / or counter to the first adjustment direction A1. The at least one first cutting drive M1 is designed, for example, as an electric motor M1 and / or as a linear motor M1 and / or as a pneumatic drive M1 and / or as a hydraulic drive M1.

[0044] The preferably arranged second cutting device 14 preferably has at least one second cutter bar 17, on which a second blade 19, referred to as a second upper blade 19, is arranged. The second upper blade 19 has, in particular, a second upper cutting edge 22, which is preferably designed as a linear cutting edge 22. The second cutter bar 17 is preferably arranged to be movable along a preferably linear and more preferably exclusively linear second travel path in and / or counter to a second travel direction A2.

[0045] In an alternative or additional development, the second cutting device 14 is preferably characterized in that the second cutting device 14 has at least one second cutting aid 24, in particular a second pressure bar 24 for fixing sheet stacks 26 and / or intermediate stacks 28 and / or blank stacks 27, which is arranged to be movable at least with respect to the vertical direction V and which is arranged in front of the second upper knife 19 along a transport path provided for transporting sheet stacks 26 and / or intermediate stacks 28 and / or blank stacks 27. Preferably, maximum contact pressures of between 0.5 N / mm 2 (half a Newton per square millimeter) and 2 N / mm 2 (two Newton per square millimeter) are exerted with the second cutting aid 24. This ensures that no layers are shifted against one another during cutting and that all layers are cut cleanly.For example, at least one second hold-down device 67 is arranged along the intended transport path after the second upper blade 19, which holds-down device 67 serves in particular to prevent cut-off components from jumping away in an uncontrolled manner.

[0046] In an alternative or additional development, the second cutting device 14 is preferably characterized in that the second cutting device 14 has at least one second cutting drive M2 for moving the second knife bar 17 in and / or counter to the second adjustment direction A2 and that the at least one second cutting drive M2 is designed as an electric motor M2 and / or as a linear motor M2 and / or as a pneumatic drive M2 and / or as a hydraulic drive M2.

[0047] In an alternative or additional development, the stack cutting device 01 is preferably characterized in that the stack cutting device 01 has at least one first stack positioning device 02, in particular for positioning at least one respective sheet stack 26. A pivot axis assigned to this first stack positioning device 02 is preferably oriented parallel to a vertical direction V. In an alternative or additional development, the stack cutting device 01 and / or the respective cutting device 13; 14 is preferably characterized in that it has at least one sheet feed area 43 and at least one blank removal area 44 or security removal area 44. The stack cutting device 01 serves in particular to produce a plurality of blank stacks 27, in particular security stacks 27, from at least one respective sheet stack 26.

[0048] For example, the at least one first stack positioning device 02 is arranged in the sheet feed area 43 or along a designated transport path, preferably immediately thereafter. For example, the first cutting device 13 is arranged downstream of the first stack positioning device 02. The first cutting device 13 is preferably assigned to the first stack positioning device 02, in particular in order to be able to align the respective sheet stacks 26 in an optimized manner.

[0049] In an alternative or additional development, the stack cutting device 01 is preferably characterized in that the at least one support element 78 is made of an elastic material, for example, rubber. The support element 78 can then be arranged as close as possible to the lower blade 77 in its supporting position and, upon contact with the upper blade 18, can be displaced by the latter without causing damage. In this way, a critical area of ​​the cutting gap 76 is reduced as effectively as possible. List of reference symbols

[0050] 01Stack cutting device 02Stack positioning device, first 03- 04Stack support surface, first (11) 11Support device, table, first 12- 13Cutting device, stack cutting device, first 14Cutting device, stack cutting device, second 15- 16Knife bar, first 17Knife bar, second 18Knife, upper knife, first 19Knife, upper knife, second 20- 21Cutting edge, upper, first 22Cutting edge, upper, second 23Cutting aid, press bar, first 24Cutting aid, press bar, second 25- 26Sheet stack 27Multiple stack, security stack 28Intermediate stack 43Sheet feed area 44Sheet removal area, security removal area 52Pressure device, first 67Pressure down device, second 68Support device, second 69Stack support surface, second (68) 71 sheets 76Cutting gap 77Knife, lower blade 78Support element 79Contact surface (78) 80- 81Cutting edge, lower (77) 82Pivoting axis, switching axis 83Bridge element 84Support surface (83) 85- 86Shielding element, ramp element 87Guide surface 88Ramp surface (86) 89Switching device 90- 91Waste piece 92Edge area (71) ADirection, transverse direction A1Adjustment direction, first A2Adjustment direction, second ETable plane, first N79Normal vector (79) M1Cutting drive, electric motor, linear motor, pneumatic, hydraulic, first M2Cutting drive, electric motor, linear motor, pneumatic, hydraulic, second N84Normal vector (84) VRection, vertical WAngle

Claims

1. Pile cutting apparatus (01), the pile cutting apparatus (01) comprising at least one first cutting device (13) for cutting at least one sheet pile (26) and the pile cutting apparatus (01) comprising at least one first front bearing device (11) having a first front pile bearing surface (04) and the pile cutting apparatus (01) comprising at least one first rear bearing device (68) having a first rear pile bearing surface (69) and the first rear pile bearing surface (69) being used to carry at least one respective detached intermediate pile (28) or multiple-up pile (27) and a cutting gap (76) being provided between the first front pile bearing surface (04) and the first rear pile bearing surface (69) and a first table plane (E) containing this first front pile bearing surface (04) and the first cutting device (13) comprising at least one movable upper blade (18) and at least one lower blade (77) including a cutting edge (81) and the first cutting device (13) comprising at least one first cutting aid (23) for fixing sheet piles (26), which is arranged so as to be movable at least with respect to a vertical direction (V) and which is arranged upstream from the first upper blade (18) along a transport path provided for a transport of sheet piles (26) and / or intermediate piles (28) and / or multiple-up piles (27), characterized in that the first cutting device (13) comprises at least one movable support element (78), which has at least one contact surface (79) provided for supporting sheets (71) and which is arranged so as to be movable at least between a support position and at least one first disposal position, and in that the at least one support element (78), at least in the support position thereof, is arranged between the first front pile bearing surface (04) and the first rear pile bearing surface (69), and in that the at least one contact surface (79) of the support element (78), when the support element (78) is arranged in the support position, is arranged in and / or beneath the first table plane (E), and in that the at least one contact surface (79) of the support element (78) is arranged closer to the cutting edge (81) of the lower blade (77) when the support element (78) is arranged in the support position than when the support element (78) is arranged in the disposal position.

2. Pile cutting apparatus according to claim 1, characterized in that the support element (78) is arranged pivotably about a switching axis (82).

3. Pile cutting apparatus according to claim 1 or 2, characterized in that the first cutting device (13) comprises at least one bridge element (83) which can be moved between at least one transfer position and at least one interruption position, and in that the bridge element (83) has at least one prop surface (84), and in that, when the bridge element (83) is arranged in the transfer position, the prop surface (84) thereof is located in the first table plane (E) and / or has a vertical normal vector (N84), and in that, when the bridge element (83) is arranged in the interruption position, the prop surface (84) thereof is located at least 50% and / or at least 75% and / or at least 95% and / or at least 99% outside the first table plane (E) and / or has a normal vector (N84) that deviates from a vertical direction.

4. Pile cutting apparatus according to claim 3, characterized in that the at least one bridge element (83) is arranged pivotably about a pivot axis (82).

5. Pile cutting apparatus according to claim 3 or 4, characterized in that the at least one support element (78) and the at least one bridge element (83) are rigidly connected to one another.

6. Pile cutting apparatus according to claim 3 or 4 or 5, characterized in that a surface normal (N79) of the contact surface (79) of the support element (78) forms an angle (W) with a surface normal (N84) of the prop surface (84) of the bridge element (83) which is at least 30° and / or at least 45° and / or at least 60° and / or at least 80°, and which is no more than 150° and / or no more than 135° and / or no more than 120° and / or no more than 100°.

7. Pile cutting apparatus according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that the first cutting device (13) comprises at least one shielding element (86) which can be moved between at least one shielding position and at least one release position, and in that the shielding element (86) is at least partly arranged above the first table plane (E) when the shielding element (86) is arranged in the shielding position thereof, and in that the shielding element (86) is completely arranged beneath the first table plane (E) when the shielding element (86) is arranged in the release position thereof.

8. Pile cutting apparatus according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that the at least one contact surface (79) of the support element (78) is at least partly arranged beneath the first table plane (E) when the support element (78) is arranged in the disposal position, or in that the at least one contact surface (79) of the support element (78) is completely arranged beneath the first table plane (E) when the support element (78) is arranged in the disposal position.

9. Pile cutting apparatus according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, characterized in that a guide surface (87) for influencing a drop path of detached pile components is arranged beneath the upper blade (18).

10. Pile cutting apparatus according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9, characterized in that the first cutting aid (23) is designed as a lowerable cutting aid (23) for pressing a part of a respective sheet pile (26) against the first front pile bearing surface (04).

11. Pile cutting apparatus according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10, characterized in that the first cutting device (13) comprises at least one lowerable holddown device (52) for pressing a part of a respective sheet pile (26) against the first rear pile bearing surface (69).

12. Pile cutting apparatus according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11, characterized in that the support element (78) is arranged pivotably about a switching axis (82), and the switching axis (82) is located beneath the table plane (E).

13. Pile cutting apparatus according to claim 12, characterized in that the switching axis (82) is located in the cutting gap (76).

14. Pile cutting apparatus according to claim 12 or 13, characterized in that the switching axis (82) is located downstream from the first front pile bearing surface (04) along a transport path provided for sheet piles (26).

15. Pile cutting apparatus according to claim 12 or 13 or 14, characterized in that the switching axis (82) is located between the first front pile bearing surface (04) and the first rear pile bearing surface (69) along a transport path provided for sheet piles (26) and is located closer to the first rear pile bearing surface (69) than to the first front pile bearing surface (04).

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