Stacking device and sheet production line comprising same

Abstract

The invention relates to a stacking device and a sheet production line including the same. The stacking device comprises a stacking conveyor suitable for receiving a series of sheets which are aligned with each other and are not overlapped; and a braking device positioned above the overlapping conveyor and configured to decelerate the sheets arriving at the overlapping conveyor and partially overlap the arriving sheets in an overlapping manner. The brake device includes: a first set of brake wheels aligned with each other along a first rotation axis orthogonal to a feeding direction in which a sheet is fed onto a stacking conveyor; and a second set of brake wheels aligned with each other along a second rotation axis orthogonal to a feeding direction in which the sheet is fed onto the overlap conveyor.

Description

Technical Field

[0001] This disclosure relates to the field of sheet production, and particularly, but not limited to, the field of corrugated cardboard sheet production. Background Technology

[0002] Corrugated board is typically produced from continuous strips of paper. At least one continuous strip of paper is corrugated in a corrugating machine and combined with two flat strips. The resulting corrugated board is cut into sheets, and the sheets are stacked for later distribution.

[0003] Production lines are typically divided into an upstream section (the so-called "wet end"), where machines operate under humid and warm conditions to process paper webs and produce continuous corrugated board; and a downstream section (the so-called "dry end"), where the continuous corrugated board is slit into longitudinal strips, which are then slit into individual sheets. The sheets are fed to a stacker, which is part of the "dry end," and are stacked into bundles or stacks. To do this, the sheets, fed at high speed from the cutter, are slowed down and arranged to partially overlap each other, i.e., in a so-called "overlapping" manner. For this purpose, conveyors and braking mechanisms are provided. Typically, the braking mechanism includes brushes that slow down the sheets through friction, rubbing against the upper surface of the sheets, posing a risk of damage.

[0004] Other braking systems use wheels or rollers, see, for example, US4240856. These systems have some drawbacks and have therefore been practically obsolete. Specifically, braking wheel or roller systems are very bulky compared to braking brushes and are slow in positioning when transitioning from one order to another on the production line, especially when the sheet lengths differ in the feed direction between successive orders.

[0005] Therefore, it is useful to provide a production line for producing and stacking sheets (especially but not limited to corrugated cardboard) with a stacking system that can overcome the limitations and defects of existing technology systems. Summary of the Invention

[0006] According to the first aspect, an overlapping device is disclosed herein for partially overlapping sheets in a stacking manner in a stacking manner.

[0007] Overlapping occurs when sheets partially overlap each other.

[0008] The overlapping device includes an overlapping conveyor adapted to receive a series of aligned but non-overlapping sheets. The overlapping device also includes a braking device positioned above the overlapping conveyor and configured to decelerate the sheets arriving at the overlapping conveyor and to partially overlap the arriving sheets in an overlapping manner. The braking device includes: a first set of brake wheels aligned with each other along a first axis of rotation orthogonal to the feed direction of the sheets on the overlapping conveyor; and a second set of brake wheels aligned with each other along a second axis of rotation orthogonal to the feed direction of the sheets on the overlapping conveyor. The first and second sets of brake wheels can move independently along the overlapping conveyor, thereby taking working positions at different distances from the inlet end of the overlapping conveyor.

[0009] Overlapping devices can be used in various processing lines that require the production of overlapping sheets.

[0010] Specifically, the application of this device in a production line for producing sheets (e.g., corrugated cardboard sheets) is described herein.

[0011] Other features and applications of the device will be described below and defined in the appended claims. Attached Figure Description

[0012] The invention can be better understood through the following description and the accompanying drawings, which illustrate non-limiting embodiments of the invention. More specifically, in the figures:

[0013] Figures 1A-1D A production line for producing corrugated cardboard sheets is shown;

[0014] Figure 2 yes Figures 1A-1D An enlarged view of the end section of the production line;

[0015] Figure 2A This is a schematic enlarged view of corrugated cardboard sheets overlapping each other on a stacking conveyor;

[0016] Figure 3 An enlarged side view of the stacking conveyor with corresponding braking device is shown;

[0017] Figure 4 It is based on Figure 3 IV-IV plan view;

[0018] Figures 5A-5F This illustrates the first operational sequence of the stacking conveyor and braking device when transitioning from one production order to the next; and

[0019] Figures 6A-6F The second operating sequence of the stacked conveyor and braking device is shown when switching from one production order to the next. Detailed Implementation

[0020] The following description will specifically address the use of stacking equipment in a corrugated board sheet production line. The production line is described as a whole, from the equipment for unwinding the paper webs (used to produce corrugated board) to the stacking machine.

[0021] However, it should be understood that the stacking apparatus described herein can also be used in other types of production lines, even for production lines that produce sheets of materials other than corrugated cardboard, as long as there are problems similar to those solved by the stacking apparatus disclosed in this invention.

[0022] Referring to the accompanying drawings, in which reference numeral 1 generally indicates a facility or production line for producing appropriately scored corrugated cardboard sheets using a continuous, flat paper web.

[0023] In the illustrated embodiment, the facility is used to produce double-wall corrugated cardboard sheets, which involves inserting two grooved paper webs between two flat paper webs (i.e., the so-called liner), and inserting a flat paper web between two grooved paper webs. Furthermore, the facility is configured to form two sheet stacks on two adjacent stackers.

[0024] The overall structure of the facility is similar to that disclosed in WO2017 / 0366685 or WO2021005123A1. However, the various sections and machines constituting the facility can be arranged in a manner very different from that shown in the disclosed embodiments. For example, the facility may have the structure disclosed in EP3678859 or DE10201000890.

[0025] Referring to the illustrated embodiment, facility 1 includes a first section 3 for producing a first single-faced corrugated board web NS, a second section 5 for producing a second single-faced corrugated board web NS, a third section 7 for feeding two single-faced corrugated board webs and a flattened paper web to a duplexer 8, and a section 9 including the duplexer 8 and corresponding auxiliary devices. Exiting from section 9 is a double-walled corrugated board CC, which is formed by a combination of a single-faced corrugated board web NS and a flattened paper web glued thereon, the flattened paper web forming a second lining of the corrugated board web.

[0026] Downstream of section 9, a conversion system is provided to convert the corrugated cardboard web (CC) into individual sheets for one or more different production orders or batches. Generally, the conversion system includes longitudinal and transverse cutting systems as well as a longitudinal notching system for cutting the corrugated cardboard web (CC) into strips, notching the strips, and cutting the individual strips into separate sheets.

[0027] Downstream of the duplexer 8, a section 11 is provided, at which means for removing trimmings and changing orders are arranged, and downstream of section 11, a section 13 is provided for longitudinally cutting and scoring the corrugated board CC from section 9 containing the duplexer 8, so as to divide the corrugated board web into multiple longitudinal corrugated board strips.

[0028] In addition, facility 1 also includes: section 15 for laterally cutting corrugated cardboard strips from section 13, a dual conveyor system 17, and finally two stacking platforms or stackers 19A, 19B for stacking cardboard sheets cut in section 15 and fed by the dual conveyor system 17.

[0029] In section 3, a first corrugating machine 21 is arranged. Corrugating machines that can be used to produce single-face corrugated board webs are known in themselves. Only the main components of the corrugating machine are described below, such as those disclosed in US 78714223 or EP 1362691, the contents of which are incorporated herein by reference.

[0030] In short, the corrugating machine 21 includes a first corrugating roll 23, which works in conjunction with a second corrugating roll 25 and a pressure roll 27 or other pressure members to join a flat paper web and a grooved paper web together. More specifically, the first flat paper web N1 is fed to the corrugating machine 21 from a first uncoiler 29. The uncoiler 29 can be constructed in a manner known in the art and therefore will not be described in detail. The uncoiler 29 may include two or more positions for supplying the first flat paper web N1 from the first unwound roll B1 and the second spare roll B1X to be unwound when the roll B1 is depleted.

[0031] The second flat paper web N2 is unwound from the second uncoiler 31, which is basically the same as the uncoiler 29. The first roll B2 and the second spare roll B2X are arranged on the second uncoiler 31. The flat paper web N2 is unwound from the first roll B2, and when the roll B2 is used up, the spare roll B2X begins to be unwound.

[0032] The first flattened paper web N1 is guided to the corrugated roll 23 after traveling around the heating roll 33. The wrap angle of the flattened paper web N1 around the heating roll 33 can be modified to transfer more or less heat to the flattened paper web N1, which comes from inside the heating roll 33 or the heating plate (e.g., heated by steam circulating therein).

[0033] The first flattened paper web N1 is pressed into grooves after passing through the roll gap formed between corrugating rolls 23 and 25. Appropriate glue is applied to the ridges formed on the grooved paper web by the application roll 36 of the application unit, so that the grooved paper web N1 can be glued to the flattened paper web N2, which is fed together with the grooved paper web N1 through the roll gap formed between the second corrugating roll 25 and the pressure roll 27.

[0034] The application roller contacts the ridge of the grooved paper web N1 that travels around the second corrugated roller 25. The application roller 36 receives glue from a can or similar device.

[0035] In some embodiments, the second flattened web N2 travels around one or more heated rolls or plates 37, 39 arranged between the uncoiler 31 and the corrugator 21 for heating. The wrap angle between the flattened web N2 and any or both of the rolls 37, 39 can be modified to change the amount of heat transferred to the flattened web N2 by the rolls 37, 39 before it contacts the pressure roll 27. Furthermore, the pressure roll can be internally heated to glue the webs N1 and N2 under high pressure and high temperature conditions.

[0036] A heating plate with the same purpose can be provided to replace the heating roller, or used in combination with the heating roller.

[0037] like Figure 2 As shown in the enlarged view, at the output end of the corrugator 21, a single-faced corrugated board web NS is obtained, formed by a first grooved paper web N1 and a second flat paper web N2. The corrugations or grooves formed on the first grooved paper web N1 are glued to the surface of the flat paper web N2 facing the grooved paper web N1 by glue C (applied by the gluing unit to the grooves O of the grooved paper web N1).

[0038] Both the first uncoiler 29 and the second uncoiler 31 include a splice, which is designated as reference numeral 100 for both uncoilers. The splice 100 typically consists of more components, schematically shown in the figure, which may take different relative positions based on which roll is being processed and which roll is awaiting processing.

[0039] A bridge 41 is provided downstream of the corrugator 21, extending toward section 5 of facility 1 and subsequent sections 7 and 9. A stock S of single-faced corrugated board webs NS can be formed on the bridge 41. The single-faced corrugated board webs NS are then fed along a first path extending above the bridge 41 to a heating roller 43 or other heating system, around which the single-faced corrugated board webs NS can travel at an adjustable wrap angle to be properly heated before reaching the double-facer 8 in section 9.

[0040] In the illustrated embodiment, facility 1 includes a second section 5, substantially identical to section 3, in which a second single-faced corrugated board web (still denoted as NS) is formed by another pair of paper webs N4 and N5 from an uncoiler similar to uncoilers 29 and 31 and a corrugator similar to corrugator 21. The second single-faced corrugated board web NS is fed onto bridge 41 to form stock S and is fed toward the double-facer 8 of section 9, wound onto a heating roller 45 substantially identical to heating roller 43 or other heating element. In other embodiments, section 5 and the corresponding corrugator may be omitted. In yet another embodiment, more than two sections 3, 5 may be provided, having corresponding corrugators and uncoilers for corrugating and unwinding the paper webs to form corresponding single-faced corrugated board webs NS, which are then glued together by the double-facer 8 of section 9.

[0041] The flattened web N3 is unwound from another uncoiler 47 equipped with a splicer (again denoted by reference numeral 100) and then fed to section 9 of the double-facer 8 (preferably traveling around the heated roll 49 or other heated element). Gluing units 51 and 53 apply glue to the spines of the respective single-faced corrugated webs NS in a known manner to glue them together and onto the flattened web N3, which will form the second liner of the corrugated board CC exiting from section 9, the first liner being formed by the flattened web N2.

[0042] Section 9, which includes the double-sided machine 8, can be implemented in a known manner and will not be described in detail here.

[0043] A rotary shear or other cutting member 61 is provided in section 11, which can perform transverse cuts to completely or only partially sever the corrugated cardboard CC fed from section 9. The rotary shear 61 is particularly useful for removing portions of the corrugated cardboard CC in which glue defects or other defects are detected, and for use in conjunction with other elements in a pattern-changing sequence. Specifically, the rotary shear is adapted to make intermediate transverse cuts on the corrugated cardboard to connect the longitudinal strips of successive orders to each other in a transition area.

[0044] In the illustrated embodiment, the corrugated cardboard CC fed through the cutting and scoring section 13 is divided into strips that can deviate along two paths at different heights defined by the two conveyor systems 17A and 17B of section 17. Generally, the cutting and scoring section 13 may include one or more slotter-scorers 13C that, in addition to longitudinally cutting the corrugated cardboard web CC into longitudinal strips, can also produce side cuts and form scoring lines. For this purpose, the slotter-scorers 13C may include one or more series of longitudinal scoring tools 13A and one or more series of longitudinal cutting tools 13B. Similarly, each series of longitudinal cutting tools may include multiple longitudinal cutting tools adapted to be positioned in a direction transverse to the feeding direction of the corrugated cardboard CC through facility 1.

[0045] Two conveyor systems 17A and 17B convey corrugated cardboard sheets obtained by transversely cutting continuous strips in section 15 to form stacks PA and PB on stacking planes 63 and 65. In the illustrated embodiment, section 15 includes two cutters 15A and 15B configured to divide longitudinal strips S1, S2 into individual sheets FA, FB. Depending on the total number of strips the corrugated cardboard web CC is divided into by the slitter-scorer 13C and how they are distributed toward the two conveyors 17A and 17B, a different number of strips can be fed to each cutter 15A and 15B.

[0046] In the illustrated embodiment, section 17 is configured to operate at two horizontal heights using two separate conveyor systems 17A and 17B. In other embodiments, production line 1 can be simpler and include a single stacking horizontal height, for example, consisting only of conveyor system 17B and a single collection surface 63. In this case, production line 1 also has a single cutter 15B.

[0047] Feed conveyors 16A and 16B are provided between each cutting blade 15A and 15B for feeding the individual sheets cut by the respective cutting blades 15A and 15B to the conveyor systems 17A and 17B.

[0048] The characteristics of each conveyor system 17A and 17B will be described in more detail below. Since the two conveyors are essentially similar, only conveyor system 17B will be described below. It should be understood that conveyor system 17A may have a similar configuration, specifically as follows: Figure 1D As shown.

[0049] Conveyor system 17B includes a series of conveyor elements arranged in sequence, specifically in Figure 2The enlarged view shows this. More specifically, the overlapping conveyor 101 is arranged downstream of the feed conveyor 16B, and the transfer conveyor 103 is arranged downstream of the overlapping conveyor 101. Downstream of the transfer conveyor 103 (e.g. Figure 1D (As shown) Other conveyors can be provided as part of the conveyor system 17B.

[0050] A holding member for temporarily holding the stacked sheets FB is associated with a transfer conveyor 103, wherein the holding member can be configured in any manner and has the function of creating gaps in the continuous flow of sheets FB from the cutter 15B. These gaps are created to allow removal of the sheet stacks formed on the collection surface 63 and the formation of new sheet stacks. An example of a temporary holding device is disclosed, for instance, in US5415389.

[0051] When production line 1 is in use, the overlapping conveyor 101 moves forward at a lower speed than the feed conveyor 16B to partially overlap the sheets FB, such as... Figure 2A The diagram schematically illustrates some overlapping sheets FB. The difference in feed speed between feed conveyor 16B and overlapping conveyor 101 defines the degree of overlap of the sheets FB. In the following diagram, overlapping sheets are shown for simplicity.

[0052] To effectively decelerate the sheet material on the overlap conveyor 101, a suction system is provided, including, for example, a suction box 109 extending along a first section of the upper branch of the overlap conveyor 101, such that the sheet material arriving there is sucked up relative to the overlap conveyor. Reference numeral 107 indicates a wing or brush provided at the inlet of the overlap conveyor 101 for the same purpose. Upstream of the overlap conveyor 101, a pair of rollers 111 are provided, which define the sheet feed gap and rotate in opposite directions at a suitable peripheral speed, typically equal to the feed speed of the feed conveyor 16B.

[0053] An important aspect during the overlapping process is that the sheets F should not be damaged when interacting with the braking components, while at the same time they should be properly braked so that they are positioned correctly along the overlapping conveyor 101 to allow successive sheets to overlap each other smoothly.

[0054] Therefore, in the embodiments described herein, a braking device 121 is arranged on the stacking conveyor 101. The braking device 121 includes a first set of brake wheels 123 aligned with each other along a first rotation axis 123A, which is orthogonal to the feed direction fF of the sheet FB on the stacking conveyor 101. The braking device 121 also includes a second set of brake wheels 125 aligned with each other along a second rotation axis 125A, which is parallel to the first rotation axis 123A and orthogonal to the feed direction of the sheet on the stacking conveyor. The first set of brake wheels 123 and the second set of brake wheels 125 can move independently along the stacking conveyor 101 according to the double arrows f123 and f125, thereby taking working positions at different distances from the inlet end of the stacking conveyor 101.

[0055] For this purpose, the brake wheel 123 of the first set of brake wheels is supported by a first slider 127, and the second slider 127 is operatively connected to a guide rail 129 extending parallel to the stacking conveyor 101. Similarly, the brake wheel 125 of the second set of brake wheels is supported by a second slider 131, which is operatively connected to the guide rail 129.

[0056] To enable the two sliders 127 and 131 to move along the guide rail 129, independent actuators are provided for the two guide rails 127 and 129. In the illustrated embodiment, slider 127 is provided with an actuator 133 (e.g., in the form of an electric motor) that drives a torsion bar to rotate. This torsion bar extends parallel to axis 123A and has a corresponding pinion 134 at its end, which meshes with a rack integral with or forming part of guide rail 129. Similarly, slider 131 is provided with an actuator 135 (e.g., in the form of an electric motor) that drives a torsion bar to rotate. This torsion bar extends parallel to axis 125A and has a corresponding pinion 136 at its end, which meshes with a rack integral with or forming part of guide rail 129.

[0057] Two actuators 133 and 135 allow two sliders 127 and 131 to translate independently along the stacking conveyor 101, the purpose of which will be explained below.

[0058] The wheel 123, supported on the first slider 127, can be raised or lowered relative to the stacking conveyor 101. For this purpose, one or more actuators are provided. In the illustrated embodiment (see details...), Figure 3 and Figure 4Each wheel 123 is provided with a cylinder-piston actuator 137, which controls the pivoting movement of a corresponding movable arm 139, which is hinged to the slider 127 at its proximal end and supports the corresponding wheel 123 at its distal end. The pivot axis of the movable arm 139 is parallel to axes 123A and 125A. Similarly, a wheel 125 supported on a second slider 131 can be raised or lowered relative to the stacking conveyor 101 by a cylinder-piston actuator 141, each cylinder-piston actuator 141 controlling the pivoting movement of a corresponding movable arm 143, which is hinged to the slider 131 at its proximal end and supports the corresponding wheel 125 at its distal end. The pivot axis of the movable arm 141 is parallel to axes 123A and 125A.

[0059] Arm 143 faces the first slider 127, and arm 139 faces the second slider 131.

[0060] Wheels 123 are spaced apart from each other. Similarly, wheels 125 are spaced apart from each other, and the relative positions of the two sets of wheels 123 and 125 allow wheel 125 to enter the space between wheels 123 until wheels 123 and 125 are arranged coaxially, that is, the rotation axes 123A and 125A coincide with each other.

[0061] This arrangement of the braking device 121 allows the wheels 123 and 125 to be quickly positioned in the correct location for each order of sheet FB without disrupting the work cycle; that is, it allows the braking wheels 123 and 125 to be correctly positioned each time in order to process the order following the one being processed.

[0062] exist Figures 5A-5F and Figures 6A-6F The sequence illustrates how this is achieved in two different operation loops.

[0063] Figures 5A-5F The sequence illustrates how the braking device is positioned when the production line needs to switch from producing shorter sheets (in the feed direction fF) to producing longer sheets. Figure 5A In this configuration, wheels 123 and 125 are coaxial with each other, i.e., interlocked, so that they essentially form a single set of wheels enclosed within a cylindrical surface. The positions of wheels 123 and 125 relative to the inlet of the overlap conveyor 101 are defined such that when sheet FB is pushed onto the overlap conveyor 101, the wheels bring each sheet FB to a correct position. This position is determined by the length of sheet FB in the fF direction.

[0064] Assuming the next production order consists of a longer sheet, it is necessary to position the first set of wheels, specifically the second set of wheels 125, at the most forward position along direction fF, defined by the length of the sheet in the next order. This translation is achieved by translating the slider 131 while keeping the slider 127 in the same position. In this way, the first set of wheels 123 remains in the correct position to decelerate the shorter sheet FB, while the second set of wheels 125 moves downstream. The movement begins by lifting wheel 125 (…). Figure 5B Then allow the slider 131 to move in the direction fF. Figure 5C Move to the location required to process longer sheets. Figure 5C In the middle, the second wheel 125 continues to rise and does not interfere with the forward movement of the sheet FB, while the sheet FB continues to be stopped by the wheel 123.

[0065] When production line 1 begins producing longer sheet FB, the leading edge of sheet FB should stop by abutting against wheel 125 of the second set of wheels, while wheel 123 of the first set rises and wheel 125 of the second set lowers onto the overlapping conveyor 101. Figure 5D As shown. The longer sheet FB, starting from the first sheet of a new order, moves forward to the position of wheel 125, stops there, and then moves forward from that position at the same speed as the overlapping conveyor 101, which causes the longer sheet to overlap.

[0066] exist Figure 5E and 5F In the subsequent steps, wheel 123 of the first group is translated and brought to a position coaxial with wheel 125. This operation allows the wheel to be repositioned later to process the next order.

[0067] Figures 6A-6F The sequence illustrates the reverse situation, where the braking device needs to be activated from the position of the braking long sheet FB ( Figure 6A ) was repositioned to the position of the brake short sheet FB. Figure 6F ).

[0068] Therefore, the described device allows for the effective and gentle deceleration of corrugated cardboard sheets without the need for brushes, wings, or other components that could potentially damage the sheet's FB and FA components. Furthermore, the arrangement of the two sets of wheels 123 and 125 allows the brake wheels to be positioned correctly before the arrival of sheets for each subsequent order. This ensures the device is always correctly configured for any order being processed without production loss, eliminating the risk of jamming, and enabling subsequent smooth and rapid operation.

Claims

1. An overlapping device for partially overlapping sheets in a stacking manner; said device comprising: Overlapping conveyors are suitable for receiving a series of sheets that are aligned with each other and do not overlap. A braking device, positioned above the overlapping conveyor, is configured to decelerate the sheets arriving at the overlapping conveyor and to partially overlap the arriving sheets in an overlapping manner. The braking device includes: a first set of brake wheels aligned with each other along a first rotation axis orthogonal to the feeding direction of the sheet on the stacking conveyor; and a second set of brake wheels aligned with each other along a second rotation axis orthogonal to the feeding direction of the sheet on the stacking conveyor; wherein the first set of brake wheels and the second set of brake wheels can move independently along the stacking conveyor to take working positions at different distances from the inlet end of the stacking conveyor; and wherein the brake wheels of the first set of brake wheels are supported by a first sliding member, and the brake wheels of the second set of brake wheels are supported by a second sliding member.

2. The apparatus according to claim 1, wherein, The first set of brake wheels and the second set of brake wheels are offset from each other in the direction of their respective axes of rotation, so that the first set of brake wheels and the second set of brake wheels can be arranged coaxially with each other, wherein the brake wheel of the first set of brake wheels is inserted between the brake wheels of the second set of brake wheels.

3. The apparatus according to claim 1, wherein, A common guide rail extends along the stacking conveyor; and wherein the first slider and the second slider are movable along the guide rail.

4. The apparatus according to claim 2, wherein, A common guide rail extends along the stacking conveyor; and wherein the first slider and the second slider are movable along the guide rail.

5. The apparatus according to claim 3, wherein, Each brake wheel is supported on a corresponding sliding member by a corresponding movable arm, the movable arm being adapted to raise and lower the brake wheel relative to the stacking conveyor.

6. The apparatus according to claim 4, wherein, Each brake wheel is supported on a corresponding sliding member by a corresponding movable arm, the movable arm being adapted to raise and lower the brake wheel relative to the stacking conveyor.

7. The apparatus according to claim 5, wherein, The movable arm is a swing arm that is hinged to a corresponding slider about an axis parallel to the axis of rotation of the brake wheel.

8. The apparatus according to claim 6, wherein, The movable arm is a swing arm that is hinged to a corresponding slider about an axis parallel to the axis of rotation of the brake wheel.

9. The apparatus according to any one of claims 5 to 8, wherein, The movable arm, carried by the first slider, extends from the first slider to the second slider and supports the brake wheel of the first set of brake wheels at the distal end of the movable arm; and wherein the movable arm, carried by the second slider, extends from the second slider to the first slider and supports the brake wheel of the second set of brake wheels at the distal end of the movable arm.

10. The apparatus according to any one of claims 1 to 8, comprising a feeder conveyor disposed upstream of the overlapping conveyor; and wherein, In use, the feeding conveyor has a higher feeding rate than the overlapping conveyor.

11. The apparatus according to any one of claims 1 to 8, comprising a transfer conveyor located downstream of the overlapping conveyor in the sheet feeding direction.

12. The device according to claim 11, wherein, A holding member for temporarily holding the stacked sheets is associated with the transfer conveyor, thereby creating a gap in the flow of the stacked sheets between the stacking conveyor and the stacking machine.

13. A production line for stacking multiple sheets, the production line comprising: A cutting blade configured to laterally cut the web to divide it into multiple sheets; An overlapping device, which is arranged downstream of the cutting blade and configured according to at least one of the preceding claims.

14. A corrugated cardboard production line, comprising: At least one single-facer for producing single-faced corrugated board webs; At least one double-facer is used to combine a single-faced corrugated board web from the single-facer with a flattened paper web and to form a corrugated board web together with the flattened paper web; A cutting blade, used to transversely cut the corrugated cardboard web from the double-facer into corrugated cardboard sheets; The stacking device according to one or more of claims 1 to 12 is arranged downstream of the cutter and upstream of the stacker.

15. The production line according to claim 14, further comprising a slit and scoring section located downstream of the double-sided machine and upstream of the cutting blade, wherein, The slit and notch section is configured to cut the corrugated board web leaving the double-facer into multiple corrugated board strips and to longitudinally notch the corrugated board.

16. The production line according to any one of claims 13 to 15, comprising a stacking machine arranged downstream of the stacking device and configured to stack overlapping sheets fed from the stacking device into a stack or bundle.

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