Multi-format stagger folding machine and corresponding method for format changeover

Abstract

A multi-format interleaving folding machine (100) comprising a frame having a plurality of members (10, 11, 12, 13, 14), at least one connection (71, 72, 73, 74) that makes the members movable relative to each other, and an interleaving folding unit comprising an overlapping device having a first roller (2) comprising first holding means (22) for sheets (A) of a first format (s1) and rotatable relative to a first member (11), and a second roller (2') comprising second holding means (22') for sheets (A) of a second format (s2) and rotatable relative to a second member (12), and an overlapping roller (4) rotatable relative to a member (10). The at least one connection (71, 72, 73, 74) is configured such that the first member (11) and the second member (12) are movable relative to the member (10), and such that the plurality of members (10, 11, 12, 13, 14) are guided from a first arrangement (A1) to a second arrangement (A2) to achieve the first format (s1) and the second format (s2).

Description

Technical Field

[0001] This invention relates to the technical field of production of staggered folded sheet packaging, i.e., sheets or articles in sheet form folded in a zigzag pattern; typically, the sheets are made of one or more layers of paper material, and the packaging can be, for example, a handkerchief packaging, a napkin packaging, or a hand towel packaging. More specifically, this invention relates to a multi-format staggered folding machine, i.e., capable of producing different staggered folded packaging without removing rollers from the machine and introducing other rollers, and a method for changing the format in the multi-format staggered folding machine. As described more fully below, the multi-format staggered folding machine is capable of producing multiple formats that differ in sheet length (often referred to by the term "cut width"), and / or the number of folds, and / or the position of the overlapping portions of the sheets. Background Technology

[0002] In this technical field, sheets to be folded in an interlaced manner to form a stack of sheets (packages) are typically fed in the form of continuous rolls or strips. These continuous rolls or strips are usually drawn from an unwinding device originating from a paper roll, then pass through a cross-cutting device that defines the product in sheet form, and finally reach a folding device, which performs one or more folds on each sheet. Typically, the forming stack of sheets is supported by a support device, and once the desired number of interlaced folded sheets are reached, a separating device separates the sheet packages.

[0003] A cutting device can define a sheet-like article by separating the sheets from each other by straight cutting (also known as the term "net cut") or by processing pre-cut lines or pre-cut points (also known as the term "tongue points") between the sheet-like articles.

[0004] When sheets are folded together in a Z-shape using a folding device, multiple sections separated by corresponding creases are formed within each sheet; each of these sections is typically called a facet. Sheets with multiple creases are also called "multi-folded," while sheets with only one crease are called "single-folded." Thus, it is possible to create staggered folded sheet packages with 2, 3, or 4 facets. A sheet with 4 facets of equal or approximately equal length is also called a W-folded sheet, while a sheet with 3 facets of equal length is also called a Z-folded sheet. Those skilled in the art will understand that the lengths of the facets may not correspond perfectly, as slight variations in the positioning of the components of the staggered folding machine can lead to dimensional variations. Furthermore, these machines typically operate at high speeds, and the sheets are usually made of paper, or in any case, of materials with similar properties; paper materials can withstand varying levels of tension, which can also lead to dimensional variations.

[0005] Typically, sheet folding is performed using two folding rollers, with a support device underneath supporting the forming staggered stack of folded sheets.

[0006] The extension and interaction positions of the overlapping sheet areas vary depending on the specific product or format. For example, in the case of three folds or Z-folds, overlapping folds with subsequent sheets can be obtained, while in the case of four folds or W-folds, two overlapping folds with subsequent sheets can be obtained. Figures 3 to 6 This is observed through examples. Figure 3 This is a schematic diagram of a Z-shaped folded sheet packaging. Figure 4 It is used to implement Figure 3 A schematic diagram of the sequence of overlapping and staggered folded sheets of the packaging body. Figure 5 This is a schematic diagram of a Z-shaped folded sheet packaging body, and Figure 6 It is used to implement Figure 5 A schematic diagram of the sequence of overlapping, staggered folded sheets of the packaging body.

[0007] The overlapping of sheets can be achieved by overlapping two sequences of sheets such that the sheets of one sequence are staggered relative to the sheets of the other sequence, or by a speed difference starting from one sequence. In the case of overlapping due to a speed difference, the speed of the sheets decreases before reaching the folding device, causing subsequent sheets in the sequence to partially overlap each other. In other words, the sheets in the sequence will move at a first speed in the first part and at a second speed lower than the first speed in the second part that follows the first part in order to achieve the desired overlap.

[0008] In a widely used method, staggered folding machines utilize rollers including clamping devices for holding sheets or sheet-like articles; however, those skilled in the art are aware of alternative solutions for conveying sheets, such as plate or belt conveyors that can integrate with or replace some of the rollers. Commonly used clamping devices are holes or suction openings connected to a suction system and / or mechanical clamps.

[0009] Existing staggered folding machines that overlap sheets by speed difference may also include a cutting device for cutting continuous strips, the cutting device including a cutting roller and at least one bottom blade cooperating with the cutting roller; a transfer roller that receives the sheet cut from the cutting roller; an overlapping roller that receives the sheet from the transfer roller; and a folding roller for folding articles into sheet form, the folding roller receiving the articles from the overlapping roller.

[0010] For the reasons mentioned above, overlap occurs due to the different tangential speeds between the transfer roller and the overlapping roller, the arrangement of the suction openings, and usually due to the presence of special recesses in the transfer roller for accommodating a portion of the sheet. Figure 1 and Figure 2 This can be observed through examples. In Figure 1 and Figure 2 In this design, the transfer rollers of two staggered folding units have the same diameter but are configured for different formats of staggered folded sheet packaging. That is, the surfaces of the transfer rollers have the same length, but the sheet is subdivided into multiple sections, and the circumferential angles defined by these sections are both the same and different.

[0011] In similar embodiments, the length of the sheet is determined by the cutting roller, particularly by the circumference of the cutting roller and the position of one or more cutting blades, the amount of overlap is determined by the speed difference between the transfer roller and the overlapping roller, and the number of folds is determined by the folding roller.

[0012] Each type of staggered folding sheet packaging requires specific parameters for various components: traditionally, staggered folding machines are manufactured for a specific production process. This is also taken into account the high speed of the material (usually paper), which typically requires important initial testing steps to identify the correct operating parameters before production begins and usually after component changes.

[0013] To avoid these traditional problems with single-format staggered folding machines, two different solutions have been proposed.

[0014] The first method involves simplifying the replacement of rollers for format switching, as described, for example, in European patent application EP1630118 A1, in order to reduce the time and technical disadvantages associated with this operation. Other examples are described in US2007203007 A1, WO 2023156926 A1 and WO 2023021386 A1.

[0015] The second approach proposes a multi-format staggered folding machine, which can achieve staggered folding of sheet-like products, such as Z-configuration and W-configuration, without the need to change rollers.

[0016] Another example of a multi-format staggered folding machine is disclosed in international patent application publication number WO 2018 / 005099 A1, which discloses a staggered folding machine that splits a single paper feed line into two production lines to increase productivity for the same output, but may also produce different formats.

[0017] Another example of a multi-format staggered folding machine is disclosed in European patent application publication number EP 2308786 A1, which, for example, refers to the corresponding Figure 2 A and Figure 2 B describes a transfer roller suitable for various formats in a staggered folding machine, the staggered folding machine including a transfer roller that cooperates with an overlap roller, and the tangential speed of the transfer roller is greater than the tangential speed of the overlap roller so as to enable the overlapping of sheets on the overlap roller.

[0018] For example, see the same application EP 2308786 A1. Figure 4 A, Figure 4 B and Figure 4 C illustrates a cutting roller that can switch from a first length to a second length of an article in sheet form because: thanks to the multiple suction openings and multiple recesses on the surface of the transfer roller, the transfer roller can operate at both the first and second lengths.

[0019] Other examples are described in US 2012202670 A1 and US 2010075820 A1.

[0020] Among other things, this application references the literature mentioned above, which relates to typical industry solutions known to those skilled in the art and have been described in summary in the prior art section.

[0021] Currently, there remains a need for a staggered folding machine capable of producing packages of sheets with multiple creases (i.e., staggered folded sheets of different formats) without changing rollers, without numerous non-operating components or components operating at low productivity, with a small size, without requiring particularly complex component designs, and / or with ease of implementation and / or maintenance relative to the performance achieved. While the above solutions can positively respond to some needs, they have limitations for other applications. For example, the solution in EP 1630118 A1 doubles some components and requires storage space for non-operating rollers; the solution in WO 2018 / 005099 A1 doubles some components and risks increased volume for the same productivity under conditions requiring production of only one format type; and the solution in EP 2308786 A1 complicates the implementation of transfer rollers and may not allow for some format combinations due to the space occupied by various components inside the rollers for properly holding the sheet. Summary of the Invention

[0022] This invention aims to avoid one or more drawbacks of existing technical solutions.

[0023] The first objective of this invention is to provide a multi-format type of staggered folding machine, that is, it can produce staggered folded packages of articles in sheet form that are different from each other, without changing the rollers installed on the machine.

[0024] Another objective of this invention is to simplify the implementation of a multi-format staggered folding machine.

[0025] Another objective of some embodiments is to achieve simple, fast, and / or repeatable format switching, i.e., to limit the need to identify the correct operating parameters in advance for each format switch or to format switch that does not require prior identification of the correct operating parameters.

[0026] Another objective of some embodiments is to reduce energy consumption and / or wear on components.

[0027] These and other objectives will be apparent to those skilled in the art upon reading the following text, achieved by means of a multi-format staggered folding machine or a method for changing the format in the multi-format staggered folding machine according to the claims, the multi-format staggered folding machine being used to produce staggered folded sheet packages of different formats from strip material.

[0028] According to the teachings of this specification, a multi-format staggered folding machine includes: a frame comprising a plurality of components; a cutting device for cutting strips to achieve a sequence of sheets, wherein each sheet has a front and a rear; a staggered folding unit for staggered folding the sequence of sheets; a moving device; and at least one connecting portion, each connecting portion enabling the components of the plurality of components to move relative to each other.

[0029] The staggered folding unit includes an overlapping device for stacking sheets on top of each other, the overlapping device including a first roller, an overlapping roller, and a folding device for folding the overlapping sheets in order to stagger the sheets.

[0030] The first roller includes a first surface for receiving a sheet and a first holding device for the sheet on the first surface, and the overlapping roller includes a surface for receiving a sheet and a holding device for the sheet on the surface.

[0031] The first component of the plurality of components includes a first seat portion for receiving a first roller rotatable relative to the first component about a first axis of rotation, and the component of the plurality of components includes a seat portion for receiving an overlapping roller rotatable relative to the component about a axis of rotation.

[0032] The moving device is configured to rotate the first roller relative to the first member and to rotate the overlapping roller relative to the member, such that the tangential velocity of the first roller is greater than the tangential velocity of the overlapping roller.

[0033] In a relative first position between the first roller and the overlapping roller, the first surface is separated from the other surface by a distance such that the holding device can attract the sheet from the first surface onto the other surface.

[0034] The first holding device and the holding device are configured such that the surface first receives the front portion of the sheet and then receives the rear portion of the preceding sheet, thereby stacking the subsequent sheet on the surface in a relative first position.

[0035] The overlapping device advantageously includes a second roller, which includes a second surface for receiving the sheet and a second holding device for the sheet on the second surface.

[0036] The second component of the plurality of components includes a second seat portion that accommodates a second roller that is rotatable relative to the second component about a second rotation axis.

[0037] The moving device is configured to rotate the second roller relative to the second member and to rotate the overlapping roller relative to the member, such that the tangential speed of the second roller is greater than the tangential speed of the overlapping roller.

[0038] At a first mutual position between the second roller and the overlapping roller, the second surface is separated from the surface by a certain distance, which allows the holding device to attract the sheet from the second surface onto the surface.

[0039] The second holding device and the holding device are configured such that the surface first receives the front portion of the sheet and then receives the rear portion of the preceding sheet, thereby stacking the subsequent sheet on the surface in a first mutual position.

[0040] The first holding device is configured for the first format, while the second holding device is configured for a second format different from the first format.

[0041] At least one connecting portion is configured such that a first member and a second member are movable relative to the member, and such that a plurality of members are guided from a first arrangement of a plurality of members to a second arrangement of a plurality of members, in which a first roller occupies volume and is in a relative first position and a second roller releases volume, in which a first roller releases volume and a second roller occupies volume and is in a first mutual position, thereby realizing a first format in the first arrangement and a second format different from the first format in the second arrangement.

[0042] According to the teachings of this specification, the method includes the following steps: Provides a multi-format staggered folding machine according to this instruction manual; The components are moved such that the components change from a first arrangement to a second arrangement, thereby achieving at least one displacement of the first component and the second component relative to the component, the at least one displacement being guided by at least one connecting part. Attached Figure Description

[0043] Specific embodiments of the present invention will be described in the following parts of this specification with reference to the claims set forth in the drawings, in which: Figure 1 and Figure 2 It is a schematic cross-sectional view of a corresponding single-format staggered folding machine in the prior art, which realizes staggered folded sheet packaging in different formats; Figures 3 to 6 This is a schematic diagram of W-shaped and Z-shaped staggered folded sheet packages and the relative sheet sequences that realize these staggered folded sheet packages; Figure 7 This is a schematic cross-sectional view of an embodiment of a multi-format staggered folding machine according to the present invention, wherein the rollers are arranged to achieve a second-format staggered folded sheet package. Figure 8 yes Figure 7 A schematic cross-sectional view of an embodiment, wherein the rollers are arranged to achieve an interlaced folded sheet package body of a first format, which is different from the second format; Figure 9 This is a rear axonometric view of an embodiment of the multi-format staggered folding machine according to the present invention; Figure 10 yes Figure 9 A cross-sectional view of an embodiment, wherein the cutting plane is vertical and passes through the middle position between the front and rear of the frame; Figure 11 yes Figure 9 A front view of an embodiment, in which some components are not shown, to observe the front frame in the second arrangement; Figure 12 yes Figure 9 A front view of an embodiment, in which some components are not shown in order to observe the front frame in the first arrangement; Figure 13 It is the trajectory line with the cutting plane shown in the figure below. Figure 9 A view of the transfer roller in an embodiment; Figure 14 yes Figure 13 A partial isometric sectional view; Figure 15 This is a front axonometric view of another embodiment of the present invention, similar to... Figure 9 In some embodiments, some components are not shown; Figure 16 yes Figure 9 and Figure 15 A schematic cross-sectional view of an embodiment, wherein the components of the front frame are in a first arrangement; Figure 17 and Figure 18 A schematic cross-sectional view shows the method for using from Figure 16 The first arrangement changed to Figure 19 The shift sequence between the frame components in the second arrangement; Figure 19 This is a schematic sectional view of the front frame components in the second arrangement; Figure 20 and Figure 21 yes Figure 15 The embodiments include views of some components, including larger scale views, in which the roller and the opposing gear are in adjacent and separated positions, respectively. Figure 22 and Figure 23 The images show the models without gears. Figure 20 and Figure 22 ; Figure 24 This is an isometric view of another embodiment of the multi-format staggered folding machine according to the present invention; Figure 25 This is an isometric view of yet another embodiment of the multi-format staggered folding machine according to the present invention in different arrangements, which is similar to... Figure 24 Examples from the above; Figure 26 and Figure 27 The first and second arrangements are schematically illustrated, which enable the use of Figure 24 and Figure 25 The embodiments implement different formats; Figure 28 It is a schematic sectional view, similar to Figure 19 The sectional view is shown, but the rollers have been removed to show the components of the seat and front frame.

[0044] Referring to the attached figure, reference numeral 100 indicates a multi-format staggered folding machine.

[0045] References are included to facilitate understanding of the invention, but do not limit the scope of protection. Detailed Implementation

[0046] Embodiments of the multi-format staggered folding machine (100) include: The frame comprises multiple components (10, 11, 12, 13, 14). A cutting device for cutting strip (N) in a net-cut manner to achieve a sequence of sheets (A), wherein each sheet (A) has a front (Pf) and a rear (Pr). An interleaved folding unit for interleaved folding of a sequence of sheets (A), the interleaved folding unit comprising: Overlapping device for stacking sheets (A) on top of each other, the overlapping device including a first roller (2) and an overlapping roller (4), and A folding device for folding overlapping sheets (A) to perform staggered folding of the sheets (A); Mobile devices; and At least one connecting part (71, 72, 73, 74), each connecting part enabling the members of the plurality of components (10, 11, 12, 13, 14) to move relative to each other.

[0047] The first roller (2) includes a first surface (21) for receiving a sheet (A) and a first holding device (22) for the sheet (A) on the first surface (21).

[0048] The overlapping roller (4) includes a surface (41) for receiving the sheet (A) and a holding device (42) for holding the sheet (A) on the surface (41).

[0049] The first component (11) of the plurality of components (10, 11, 12, 13, 14) includes a first seat (11a) for receiving a first roller (2); the first roller (2) is rotatable relative to the first component (11) about a first axis of rotation (X1).

[0050] The component (10) of the plurality of components (10, 11, 12, 13, 14) includes a seat (10a) for accommodating an overlapping roller (4); the overlapping roller (4) is rotatable relative to the component (10) about a rotation axis (X).

[0051] The moving device is configured to rotate the first roller (2) relative to the first member (11) and to rotate the overlapping roller (4) relative to the member (10) such that the tangential speed of the first roller (2) is greater than the tangential speed of the overlapping roller (4).

[0052] In the relative first position (RP) between the first roller (2) and the overlapping roller (4), the first surface (21) is separated from the surface (41) by a certain distance, which allows the holding device (42) to attract the sheet (A) from the first surface (21) onto the surface (41).

[0053] The first holding device (22) and the holding device (42) are configured such that the surface (41) first receives the front part (Pf) of the sheet (A) and then receives the rear part (Pr) of the preceding sheet (A), thereby stacking the subsequent sheet (A) on the surface (41) in a relative first position (RP).

[0054] Advantageous: The overlapping device includes a second roller (2') which includes a second surface (21') for receiving a sheet (A) and a second holding device (22') for the sheet (A) on the second surface (21'). The second component (12) of the plurality of components (10, 11, 12, 13, 14) includes a second seat (12a) for receiving a second roller (2'); the second roller (2') is rotatable relative to the second component (12) about a second axis of rotation (X2); The moving device is configured to rotate the second roller (2') relative to the second member (12) and to rotate the overlapping roller (4) relative to the member (10) such that the tangential velocity of the second roller (2') is greater than the tangential velocity of the overlapping roller (4); At a first mutual position (MP) between the second roller (2') and the overlapping roller (4), the second surface (21') is separated from the surface (41) by a certain distance, which allows the holding device (42) to attract the sheet (A) from the second surface (21') onto the surface (41); The second holding device (22') and the holding device (42) are configured such that the surface (41) first receives the front portion (Pf) of the sheet (A), and then receives the rear portion (Pr) of the preceding sheet (A), thereby stacking the subsequent sheet (A) on the surface (41) in a first mutual position (MP); and The first holding device (22) is configured for a first format (s1), that is, configured to hold a type of sheet (A) that can obtain the first format (s1), and the second holding device (22') is configured for a second format (s2), that is, configured to hold a type of sheet (A) that can obtain a second format (s2) different from the first format (s1).

[0055] Furthermore, at least one connecting part (71, 72, 73, 74) is configured as follows: This allows the first component (11) and the second component (12) to move relative to the component (10); This allows multiple components (10, 11, 12, 13, 14) to be guided from a first arrangement (A1) of multiple components (10, 11, 12, 13, 14) to a second arrangement (A2) of multiple components (10, 11, 12, 13, 14), in which a first roller (2) occupies volume (V) and is in a relative first position (RP) and a second roller (2') releases volume (V), in which the first roller (2) releases volume and the second roller (2') occupies volume (V) and is in a first mutual position (MP), thereby realizing a first format (s1) in the first arrangement (A1) and a second format (s2) different from the first format (s1) in the second arrangement (A2).

[0056] The aforementioned multi-format staggered folding machine (100) is capable of staggered folding of a first format (s1) and a second format (s2) of a sheet package (I) without changing any rollers on the machine, i.e., without removing the first roller (2) and introducing the second roller (2'). This effect is achieved by the presence of the second roller (2') and at least one connecting part (71, 72, 73, 74) that guides multiple components (10, 11, 12, 13, 14) from the first arrangement (A1) to the second arrangement (A2).

[0057] Without replacing the first roller (2), the format (s1, s2) can be switched more quickly, and preliminary operations such as adjusting the phase or distance between rollers can be simplified or eliminated.

[0058] The first roll (2) and the second roll (2') can be of conventional type, that is, the first roll (2) does not require a particularly complex design to achieve multiple configurations, and facilitates the combination of formats (s1, s2) that are difficult to obtain by working on a single roll with several operating configurations.

[0059] Generally, the rollers of a staggered folding machine are not cantilevered but inserted between the front and rear frames. To avoid redundancy and to include the case of cantilevered roller mounting, the invention is described herein with respect to multiple components (10, 11, 12, 13, 14) on the same side (i.e., the front side in the accompanying example figures). To clarify the mirror-symmetric nature of the components of the rear frame, reference numerals have been added, which are appended with the letter "r" to multiple components (10r, 11r, 12r, 13r). Obviously, the same operation can be performed on other parts, such as at least one connection (71, 72, 73, 74) transitioning from the first arrangement (A1) to the second arrangement (A2). Those skilled in the art will understand that some components (e.g., at least one actuator (81, 82, 83)) do not need to be mirror-symmetric on both sides, but precise displacement should still be ensured to avoid stress on components that transmit motion from one side to the other.

[0060] In known embodiments, typical holding devices, namely the first holding device (22), the second holding device (22'), the holding device (42) and the third holding device (32) described below, typically include a suction port or opening (24) connected by means of a suction conduit (23) and a suction system and / or mechanical clamps.

[0061] The multi-format staggered folding machine (100) preferably includes at least one actuator (81, 82, 83). Each actuator displaces a component among a plurality of components (10, 11, 12, 13, 14), and at least one actuator (81, 82, 83) is configured to change the plurality of components (10, 11, 12, 13, 14) from a first arrangement (A1) to a second arrangement (A2) and / or (preferably and) from the second arrangement (A2) to the first arrangement (A1).

[0062] The use of at least one actuator (81, 82, 83) further simplifies the format switching (s1, s2), which can then be managed by the control unit of at least one actuator (81, 82, 83), including remote management.

[0063] The first roller (2) in the first arrangement (A1) and the second roller (2') in the second arrangement (A2) are preferably arranged relative to the member (10) to transfer the front part (Pf) of the sheet (A) to the same feed area (In). More preferably, the feed area (In) is located at the upper end of the overlapping roller (4).

[0064] The step of overlapping the sheet (A) by means of the speed difference is a critical step, and the behavior of the first roller (2) and the second roller (2') being as similar as possible simplifies the design and / or manufacturing. For example, in cases involving other components, the components must not be repositioned or disconnected. The inlet of the sheet (A) can also be located in the upper region of the overlapping roller (4) of both the first roller (2) and the second roller (2'), such that the overlap on the surface (41) occurs in the portion away from the first roller (2) and the second roller (2') along the rotation direction of the overlapping roller (4).

[0065] In a preferred embodiment: The first axis of rotation (X1) in the first arrangement (A1) and the second axis of rotation (X2) in the second arrangement (A2) have the same position relative to the member (10); The first roller (2) and the second roller (2') have or substantially have the same outer diameter; The first holding device (22) subdivides the first surface (21) into a first number of portions, the first number of portions defining circumferential angles (α) that are equal or substantially equal to each other, wherein each portion holds a sheet (A). The second holding device (22') subdivides the second surface (21') into a second number of portions, the second number of portions defining circumferential angles (α) that are equal or substantially equal to each other, wherein each portion holds a sheet (A); and The second quantity is different from the first quantity.

[0066] This implementation allows for the production of two formats (s1, s2) by simply modifying the arrangement of the holding device. The same outer diameter allows for the reproduction of the same transfer from the first point toward the overlapping roller (4); this is particularly convenient when the first roller (2) and the second roller (2') receive the sheet (A) directly from the cutting roller (3) shown below.

[0067] The same outer diameter is advantageously applied to the production of staggered folded sheet packaging bodies (I) in either a W or Z configuration. When the first roller (2) and the second roller (2') have or substantially have the same outer diameter, the first surface (21) and the second surface (21') have or substantially have the same length. In the case of lengths that are multiples of 3 and 4, staggered folded sheet packaging bodies (I) in both W and Z configurations can be obtained. For example, in the case of a perimeter of 960 mm, a sheet (A) with a first length (L1) of 320 mm and a sheet with a second length (L2) of 240 mm can be defined, thus enabling staggered folded sheet packaging bodies (I) in both W and Z configurations, i.e., a first format (s1) and a second format (s2) with creases spaced equidistant from each other (80 mm).

[0068] The sheet (A) sequence can be obtained from the strip (N) using a cutting device comprising a cutter inserted between a roll unwinder and a sheet conveyor (A), the roll unwinder typically supplying the strip (N), and the sheet conveyor, such as a plate or suction belt conveyor, located upstream of the first roller (2) and the second roller (2'). Furthermore, the first cutter of the cutting device can be carried by the first roller (2) and the second roller (2') and cooperate with the second cutter of the cutting device.

[0069] When using the cutting roller (3), especially when the cutting roller transfers the sheet (A) directly onto the first roller (2) and the second roller (2'), the multi-format staggered folding machine (100) is particularly compact and / or has high productivity and / or guarantees excellent quality. This option also avoids the complexity of these rollers caused by the need to find space for the first cutter.

[0070] The cutting device preferably includes a first bottom blade (30) or a blade and a cutting roller (3), the cutting roller including a third surface (31) for receiving the sheet (A), a third holding device (32) for the strip and / or sheet (A) on the third surface (31), and at least one blade (33) or bottom blade that cooperates with the first bottom blade (30) or blade to cut the strip (N) in order to achieve the sequence of the sheet (A).

[0071] The third component (13) of the plurality of components (10, 11, 12, 13, 14) includes a third seat (13a) for accommodating the cutting roller (3); the cutting roller (3) is rotatable relative to the third component (13) about a third axis of rotation (X3).

[0072] The moving device is configured to rotate the cutting roller (3) relative to the third member (13) and rotate the first roller (2) relative to the first member (11) such that the tangential speed of the cutting roller (3) is equal to the tangential speed of the first roller (2).

[0073] The moving device is configured to rotate the cutting roller (3) relative to the third member (13) and rotate the second roller (2') relative to the second member (12) such that the tangential speed of the cutting roller (3) is equal to the tangential speed of the second roller (2').

[0074] In the first arrangement (A1), the first surface (21) and the third surface (31) are separated by a certain distance, which allows the first holding device (22) to attract the sheet (A) from the third surface (31) to the first surface (21).

[0075] In the second arrangement (A2), the second surface (21') is separated from the third surface (31) by a certain distance, which allows the second holding device (22') to attract the sheet (A) from the third surface (31) to the second surface (21').

[0076] Usually, such as Figure 7 , Figure 8 , Figure 10 and Figure 16 As illustrated by example, the cutting device is configured to cut a sheet (A) of a first length (L1) or alternatively a second length (L2). Therefore, a first holding device (22) is configured for the sheet (A) having the first length (L1) to obtain a first format (s1), and a second holding device (22') is configured for the sheet (A) having the second length (L2) to obtain a second format (s2).

[0077] As already discussed with respect to the first roller (2) and the second roller (2'), the same cutting roller (3) can produce sheets (A) of different lengths by changing the position of at least one blade (33). Figure 7 , Figure 8 , Figure 10 and Figure 16 The diagram illustrates how the cutting roller (3) operates with right angles between the four blades (33) and with 120° (sexagenary) angles between the three blades (33). Referring to the above embodiment, i.e., with a circumference of 960 mm, a sheet (A) of 240 mm will be obtained in the first case and a sheet (A) of 320 mm will be obtained in the second case.

[0078] Typically, a multi-format staggered folding machine (100) includes a fixed cutting beam, i.e., one that cannot rotate relative to a frame, which includes a first bottom cutter (30) or possibly a first blade. More preferably, the first bottom cutter (30) has a helical extension structure. The fixed beam in Figure 9 , Figure 10 , Figure 16 , Figure 24 and Figure 25 It is clearly visible in the middle.

[0079] While direct start-up of the first roller (2) and the second roller (2') is not excluded, a staggered folding machine typically includes: a motor (60) for the cutting roller (3) and the first roller (2); and another motor (64) for the overlapping roller (4) and typically for the fourth roller (4f) and the fifth roller (5f) and for the folding finger (45), which will be discussed below.

[0080] This particularly allows for simpler and more secure management of synchronization between various components, as will be referenced below. Figure 7 and Figure 8 To better showcase.

[0081] The moving device preferably includes a motor (60), a first gear (61) securely constrained to a first roller (2), a second gear (62) securely constrained to a second roller (2'), and a third gear (63) securely constrained to a cutting roller (3). In a first arrangement (A1), the third gear (63) engages the first gear (61), and in a second arrangement (A2), the third gear (63) engages the second gear (62), and the motor (60) causes the first gear (61) and the second gear (62) to move via the third gear (63).

[0082] Thanks to the connection between the gears (61, 62, 63), motion can be easily transmitted to the first gear (61) or the second gear (62).

[0083] In the example shown in the accompanying drawings, at least one connection (71, 72, 73, 74) can be equivalent to a sliding joint or a revolute joint because the components among the plurality of members (10, 11, 12, 13, 14) are constrained to translation or rotation. More specifically, in Figure 9 and Figure 15 In the embodiments, at least one connecting portion (71, 72, 73, 74): Constrain the third member (13) and member (10) such that the first member (11) is translated relative to member (10) and the second member (12); Constrain the second member (12) and another member (14) inserted between the second member (12) and the member (10) such that the second member (12) translates relative to the member (10) and the first member (11); Constrain the first member (11) and the third member (13) such that the first member (11) can rotate relative to the third member (13), and therefore can rotate relative to the member (10) and the second member (12).

[0084] In the accompanying drawings, another insert member (14) has been inserted, also to illustrate how the first arrangement (A1) and the second arrangement (A2) depend on the connection of at least one connecting part (71, 72, 73, 74), which does not directly connect the first member (11), the second member (12), the third member (13), and two of the members (10). In the example case, the other insert member (14) carries the fifth roller (5f), making it possible to change and / or adjust the distance relative to the fourth roller (4f) of the folding device.

[0085] like Figure 10 and Figure 15 As illustrated by example, at least one connecting portion (71, 72, 73, 74) preferably includes a first connecting portion (71) and a second connecting portion (72), the first connecting portion restricting the movement of the first member (11) relative to the member (10) and thus restricting the movement of the second member (12) along the first path (71a), and the second connecting portion restricting the movement of the second member (12) relative to the member (10) and thus restricting the movement of the first member (11) along the second path (72a).

[0086] The first connecting part (71) and the second connecting part (72) can be implemented, for example, using a linear guide. For example, depending on the load and the desired accuracy, the linear guide may include a recirculating ball slide or a roller slide.

[0087] By using simple connections between components in multiple components (10, 11, 12, 13, 14), components can be guided from the first arrangement (A1) to the second arrangement (A2) without losing important information about the original positioning, thus enabling easy return to the first arrangement (A1).

[0088] More preferably, the rotation axis (X), the first rotation axis (X1), and the second rotation axis (X2) are parallel to the first direction (F), the first path (71a) is horizontal and orthogonal to the first direction (F), and the second path (72a) is horizontal and orthogonal to the first direction (F). The movement can proceed in a direction that allows for easier disengagement from the components of the staggered folding machine, and generally has limited or no effect on the paper path.

[0089] The aforementioned translation allows for the alternative operation of either the first roller (2) or the second roller (2'), however the first surface (21) is always near the third surface (31); this may require the second roller (2') to maintain rotation and / or may cause disturbances or interference.

[0090] The multi-format staggered folding machine (100) is preferably configured such that the first roller (2) can move toward and away from the cutting roller (3), and is configured to prevent the first roller (2) from rotating when it moves away from the cutting roller (3). In this way, energy consumption and / or wear on the components can be reduced.

[0091] At least one connecting portion (71, 72, 73, 74) preferably includes a first rotatable connecting portion (73) that allows the first member (11) to rotate relative to the third member (13) about a predetermined axis of rotation (X73), and the first axis of rotation (X1) and the predetermined axis of rotation (X73) do not coincide, such that: The rotation of the first member (11) relative to the third member (13) in the first direction causes the first surface (21) to move from the adjacent position (PP) away from the third surface (31) to the removed position (PD), and The rotation of the first member (11) relative to the third member (13) in a second direction opposite to the first direction causes the first surface (21) to move from the removed position (PD) toward the third surface (31) to the adjacent position (PP).

[0092] Figure 22 and Figure 23 Especially with Figure 14 When observed together, the first rotatable connection (73) between the first member (11) and the third member (13) is shown by way of example. Figure 22 and Figure 23 In the middle, except for not showing Figure 14 Apart from the support member covering the first gear (61) on the right side, the first gear (61) is not shown, so that the first member (11) and the cover covering the first gear can be observed from the front side. Figure 14 The roller bearing (98) between the first member (11) and the first roller (2) and the sliding bearing (76) or bushing above the first member (11) are shown. Figure 14 A view of the vacuum chamber is also shown.

[0093] Typically, the first roller (2) is not fitted with a brake or idles before rotating about a predetermined axis of rotation (X73); thus, the first roller (2) may lose synchronization or phase coherence with the cutting roller (3) when in the removed position (PD). To prevent this from happening, the multi-format staggered folding machine (100) preferably includes a guide device configured to restrict the rotation of the first roller (2) relative to the third member (13) during the rotation of the first member (11) relative to the third member (13), such that after displacement from the adjacent position (PP) to the removed position (PD) and from the removed position (PD) to the adjacent position (PP), the first roller (2) has the same orientation relative to the third member (13).

[0094] In a particularly simple embodiment, the guiding device includes a guiding surface that forces the first roller (2) to follow a path.

[0095] like Figure 14 and Figure 16 As illustrated by example, the guiding device preferably includes a guiding portion (9) having a shaped hole (91) and being securely constrained to the first roller (2), for example, securely constrained to the first gear (61). The guiding device also includes a movable pin (92) carried by a third member (13) and movable between a position where the movable pin engages the shaped hole (91) and a position where the movable pin releases the shaped hole (91), thereby restricting displacement of the first roller (2) relative to the third member (13) or allowing the first roller (2) to rotate relative to both the first member (11) and the third member (13).

[0096] like Figure 15 As illustrated by example, the guiding device preferably also includes an actuator (93) that moves the movable pin (92) between the two aforementioned positions. Figure 14 It shows how the guide (9) is adjustable relative to the first gear (61), that is, the circumferential position of the guide can be varied because the guide has two grooves.

[0097] When the roller is moved by means of gears, in the adjacent position (PP), the first gear (61) engages the third gear (63), and in the disengaged position (PD), the first gear (61) disengages from the third gear (63). Figure 20 and Figure 21As illustrated in the enlarged view, the guide device is particularly useful to ensure that the first gear (61) re-engages with the third gear (63) in the same interaction position. The larger scale diagram shows two circumferences on the teeth of the third gear (63), which the motor (60) can position in the same location, while the teeth of the first gear (61) are returned to their original position by the action of the guide device. This also allows for engagement between the tooth slots.

[0098] like Figures 24 to 27 As illustrated in the example, at least one connecting part (71, 72, 73, 74) may include a rotatable connecting part (74) that allows the first member (11) and the second member (12) to rotate relative to the member (10) about a predetermined axis of rotation (X74).

[0099] Figures 24 to 27 The constraint provided by the rotatable connector (74) is shown to guide the first member (11) and the second member (12) (which are integral members in this case) to move along a circular trajectory: the rotatable connector (74) guides the first member (11) and the second member (12) so that the first member and the second member can be moved from the first arrangement (A1) to the second arrangement (A2) along a third path (74a).

[0100] exist Figure 24 and Figure 25 In an exemplary embodiment, the first gear (61) which is firmly constrained to the first roller (2), the second gear (62) which is firmly constrained to the second roller (2'), and the third gear (63) are always meshed with each other.

[0101] However, as mentioned above, in order to reduce energy consumption and / or wear on components, the multi-format staggered folding machine (100) is preferably configured such that the first roller (2) and the second roller (2') can move away from the cutting roller (3) when not in use, and is configured to prevent the first roller (2) and the second roller (2') from rotating when the second roller (2') moves away from the cutting roller (3). Figures 24 to 27 In alternative embodiments illustrated by way of example, the first member (11) and the second member (12) may then be reversibly and securely constrained, or may be different members so as to allow further guided displacement from at least another of the at least one connecting portion (71, 72, 73, 74). For example, see reference to Figure 26 and Figure 27The first component (11) and the second component (12) replace the single part that forms a rotation about a predetermined axis of rotation (X74) and can be rotatably connected to the part that rotates about the predetermined axis of rotation (X74), wherein the first axis of rotation (X1) and the second axis of rotation (X2) do not coincide with the predetermined axis of rotation (X74) in a manner similar to that of the first rotatable connection (73). Figure 24 and Figure 25 The embodiments are essentially the same as each other, differing only in the type of at least one actuator (81, 82, 83): Figure 24 The first actuator (81) in the cylinder is a cylinder. Figure 25 The first actuator in it is a stepper motor. Figure 25 In the middle, the stepper motor causes the gear to rotate, which meshes with another gear that is firmly constrained to the first member (11) and the second member (12).

[0102] In a common embodiment, the folding device includes a folding roller that engages with folding fingers (45) to fold the sheet (A), thereby achieving an interleaved folded sheet package (I). The interleaved folded sheet package (I) being formed is supported by a special support device. As known to those skilled in the art, in a common embodiment, the support device includes a forming table (40a) and a separating table (40b), the forming table being vertically movable and the separating table being at least horizontally movable to be inserted between the interleaved folded sheet package (I) already formed on the forming table (40a) and the interleaved folded sheet (A) to be fed in. It is also known to remove the interleaved folded sheet package (I) from the space below the interleaved folding unit by means of a conveyor belt.

[0103] The folding device preferably includes a fourth roller (4f) and a fifth roller (5f), and the frame includes: another seat (10b) that houses the fourth roller (4f), which is rotatable relative to the member (10) about a fourth rotation axis (X4); and yet another seat (14a) that houses the fifth roller (5f), which is rotatable relative to the member (10) about a fifth rotation axis (X5).

[0104] Although the first arrangement (A1) and the second arrangement (A2) can be obtained by shifting the member (10) relative to the ground, it is preferred that the member (10) does not change its position relative to the ground.

[0105] The fourth roller (4f) and the fifth roller (5f) define the exit area of ​​the staggered folded sheet package, and thus define the positioning of the production line downstream. Therefore, the preferred component (10) cannot move relative to the fourth roller (4f) and the fifth roller (5f).

[0106] In the example embodiment shown in the accompanying drawings, as described above, the fourth roller (4f) and the fifth roller (5f) cooperate with the folding finger (45).

[0107] The multi-format staggered folding machine (100) preferably includes one or more strip deflection rollers (99), and the second component (12) includes one or more seats (99a), each of which accommodates a corresponding strip deflection roller (99). The presence of the strip deflection rollers (99) on the second component (12) simplifies the management of the strip (N) during format switching.

[0108] At least one actuator (81, 82, 83) preferably comprises a precision actuator, such as a precision hydraulic cylinder or a precision electric cylinder. A precision actuator can successfully guarantee the necessary accuracy defining the first arrangement (A1) and the second arrangement (A2). However, even with a precision actuator, the use of an adjustable abutment (95) may still be preferred.

[0109] The multi-format staggered folding machine (100) preferably includes adjustable abutments (95), each adjustable abutment being inserted between members of a plurality of components (10, 11, 12, 13, 14). The adjustable abutments (95) are arranged to define positions between at least two members of the plurality of components (10, 11, 12, 13, 14) in a first arrangement (A1) and between at least two members of the plurality of components (10, 11, 12, 13, 14) in a second arrangement (A2). For example, Figure 21 An adjustable abutment (95) is shown that defines the position between the first member (11) and the third member (13) in the first arrangement (A1), and Figure 11 Two adjustable abutments (95) are shown, which are positioned between the third member (13) and the second member (12) and between the third member (13) and the member (10). Figure 11 and Figure 14 A small plate (75) is shown, which is used, for example, to limit the displacement of the roller bearing (98) that is typically inserted between the roller and multiple components (10, 11, 12, 13, 14).

[0110] The adjustable abutment (95) can adjust the relative positions between multiple components (10, 11, 12, 13, 14) during testing, and the changes over time, such as those caused by temperature abrupt changes, are minimal and the effects of such temperature abrupt changes are usually negligible.

[0111] like Figure 20 As illustrated by example, the adjustable abutment (95) may include a calibrating screw and a possible hardening plate.

[0112] The present invention also relates to a method for changing the format in a multi-format staggered folding machine (100).

[0113] An embodiment of this method includes the following steps: A multi-format staggered folding machine (100) according to this instruction manual is provided. Move one of the plurality of components (10, 11, 12, 13, 14) such that the plurality of components (10, 11, 12, 13, 14) change from a first arrangement (A1) to a second arrangement (A2), thereby achieving at least one displacement of the first component (11) and the second component (12) relative to the component (10), the at least one displacement being guided by at least one connecting part (71, 72, 73, 74).

[0114] Thanks to the guidance provided by the constraint response of at least one connecting part (71, 72, 73, 74), multiple components (10, 11, 12, 13, 14) can be repeatedly displaced into the second arrangement (A2).

[0115] The method typically includes the following steps: repositioning one of the plurality of components (10, 11, 12, 13, 14) from the second arrangement (A2) to the first arrangement (A1), thereby achieving at least one displacement of the first component (11) and the second component (12) relative to the component (10), the at least one displacement being guided by at least one connecting part (71, 72, 73, 74).

[0116] The at least one connecting part (71, 72, 73, 74) enables the maintenance of the relationship between the multiple components (10, 11, 12, 13, 14) so ​​that it can be returned to the first arrangement (A1) in a simple manner.

[0117] By maintaining the relationship between multiple components (10, 11, 12, 13, 14), the need for preliminary operations of adjusting and modifying each format switch is eliminated.

[0118] In the provisioning step, the multi-format staggered folding machine (100) is preferably provided with a first member (11) that rotates relative to the third member (13) about a predetermined axis of rotation (X73) as described above, and in the moving step, the first member (11) first translates, and then the first member (11) rotates relative to the third member (13) about a predetermined axis of rotation (X73).

[0119] Figures 16 to 19A shift sequence is shown that is achieved by at least one connecting part (71, 72, 73, 74) from the first arrangement (A1) to the second arrangement (A2), and the shift sequence can be repeated in reverse mode to return to the first arrangement (A1).

[0120] Figure 16 A first path (71a) and a second path (72a) are shown, which, in combination with the rotation of the first member (11) relative to the third member (13), enable a transition from the first arrangement (A1) to the second arrangement (A2). In the sequence given by way of example, the first member (11) first translates along the first path (71a), and the first member (11) rotates about a predetermined axis of rotation (X73), and finally the second member (12) translates along the second path (72a).

[0121] In the supply step, a multi-format staggered folding machine (100) is preferably provided, wherein at least one connecting part (71, 72, 73, 74) includes a first rotatable connecting part (74) that allows the first member (11) and the second member (12) to rotate relative to the member (10) about a predetermined axis of rotation (X74), as described above. Furthermore, in the movement step, the first member (11) and the second member (12) rotate about the predetermined axis of rotation (X74). The rotatable connecting part (74) and the first rotatable connecting part (73) can be implemented using sliding bearings or roller bearings.

[0122] In the supply step, a multi-format staggered folding machine (100) is provided, which preferably includes at least one actuator (81, 82, 83) and a control unit of the at least one actuator (81, 82, 83), and during the movement step, at least one signal is transmitted to the control unit, which is configured to command the at least one actuator (81, 82, 83) in response to the at least one signal to implement the second arrangement (A2).

[0123] Figure 7 , Figure 8 , Figure 24 and Figure 25 An example is shown of a transition from a first arrangement (A1) to a second arrangement (A2) by rotating the first member (11) and the second member (12) relative to a predetermined axis of rotation (X74). As per... Figure 7 and Figure 8 As explained in the text regarding the first roller (2), the second roller (2'), the cutting roller (3), and the overlapping roller (4), for Figure 24 The actuation of the first actuator (81) in the embodiment is obtained Figure 25 The layout is visible in the middle, and for Figure 25The actuation of the first actuator (81) in the embodiment is obtained Figure 25 The layout is visible in the middle.

[0124] Figure 7 and Figure 8 The diagram shows how the first roller (2) and the second roller (2') are typically provided with recesses that accommodate a portion of the sheet (A) after a portion of the sheet has been held by the overlapping roller (4), with the aim of allowing stacking due to the speed difference between the first roller (2) or the second roller (2') and the overlapping roller (4).

[0125] As is known to those skilled in the art, in order to obtain Figure 3 The overlapping shown requires that the tangential velocity of the overlapping roller (4) relative to the member (10) be 2 / 3 of the tangential velocity of the second roller (2') relative to the second member (12), while Figure 5 The overlap shown can be achieved by having the tangential speed of the overlapping roller (4) relative to the member (10) be half that of the tangential speed of the first roller (2) relative to the first member (11). In the embodiment shown in the figure, the cutting roller (3) is driven by a motor (60) at the same speed as the first roller (2) and the second roller (2'), while the fourth roller (4f), the fifth roller (5f), and the folding finger (45) driven by an oscillator are driven by another motor (64) at the same speed as the overlapping roller (4).

[0126] The multi-format staggered folding machine (100) of this specification preferably realizes a W-configuration or Z-configuration staggered folded sheet package (I).

[0127] Therefore, it is preferred that the first format (s1) is a W-shaped staggered folded sheet packaging body, and the second format (s2) is a Z-shaped staggered folded sheet packaging body, or vice versa. Figure 3 and Figure 5 The example provided illustrates this point: Z-shaped folded sheet (A) has three identical or substantially identical folds, typically overlapping a subsequent sheet (A) with one fold and a preceding sheet (A) with one fold (obviously excluding the end sheet (A)). W-shaped folded sheet (A), which has four identical or substantially identical folds, typically with two folds overlapping the upper part of the subsequent sheet (A), and for the two folds of the preceding sheet (A) (obviously excluding the end sheet (A)).

[0128] However, the multi-format staggered folding machine (100) of this specification can produce staggered folded sheet packages (I) of other different formats (s1, s2), such as having 6 or 8 folds, with each format having identical or substantially identical folds, overlapping half of the folds with the subsequent sheet (A) and half of the folds with the preceding sheet (A). It should be understood that the above description has been done by way of non-limiting example, and any structural variations are considered to fall within the scope of protection of the present invention as claimed below.

Claims

1. A multi-format staggered folding machine (100) for producing staggered folded sheet packages (I) of different formats (s1, s2) from a strip (N), the multi-format staggered folding machine comprising: The frame includes multiple components (10, 11, 12, 13, 14). A cutting device for cutting strips (N) to achieve a sequence of sheets (A), wherein each sheet (A) has a front portion (Pf) and a rear portion (Pr). Interlaced folding unit, the interlaced folding unit being used to interlaced fold the sheet (A) sequence, the interlaced folding unit comprising: An overlapping device for stacking the sheets (A) together, the overlapping device including a first roller (2) and an overlapping roller (4), and A folding device for folding overlapping sheets (A) to perform staggered folding of the sheets (A); Mobile devices; as well as At least one connecting part (71, 72, 73, 74), each connecting part enabling the members of the plurality of components (10, 11, 12, 13, 14) to move relative to each other; in: The first roller (2) includes a first surface (21) for receiving the sheet (A) and a first holding device (22) for the sheet (A) on the first surface (21). The overlapping roller (4) includes a surface (41) for receiving the sheet (A) and a holding device (42) for holding the sheet (A) on the surface (41). The first component (11) of the plurality of components (10, 11, 12, 13, 14) includes a first seat (11a) which accommodates the first roller (2) and the first roller is rotatable relative to the first component (11) about a first rotation axis (X1); The component (10) of the plurality of components (10, 11, 12, 13, 14) includes a seat (10a) that accommodates the overlapping roller (4) which is rotatable relative to the component (10) about a rotation axis (X); The moving device is configured to rotate the first roller (2) relative to the first member (11) and to rotate the overlapping roller (4) relative to the member (10) such that the tangential velocity of the first roller (2) is greater than the tangential velocity of the overlapping roller (4); In a relative first position (RP) between the first roller (2) and the overlapping roller (4), the first surface (21) and the surface (41) are separated by a certain distance, such that the holding device (42) can attract the sheet (A) from the first surface (21) to the surface (41); The first holding device (22) and the holding device (42) are configured such that the surface (41) first receives the front portion (Pf) of the sheet (A) and then receives the rear portion (Pr) of the preceding sheet (A), thereby stacking the subsequent sheet (A) on the surface (41) in the relative first position (RP); The multi-format staggered folding machine (100) is characterized by: The overlapping device includes a second roller (2'), the second roller including a second surface (21') for receiving a sheet (A) and a second holding device (22') for the sheet (A) on the second surface (21'). The second component (12) of the plurality of components (10, 11, 12, 13, 14) includes a second seat (12a) that accommodates the second roller (2') which is rotatable relative to the second component (12) about a second rotation axis (X2); The moving device is configured to rotate the second roller (2') relative to the second member (12) and to rotate the overlapping roller (4) relative to the member (10) such that the tangential velocity of the second roller (2') is greater than the tangential velocity of the overlapping roller (4); In a first mutual position (MP) between the second roller (2') and the overlapping roller (4), the second surface (21') is separated from the surface (41) by a certain distance, such that the holding device (42) can attract the sheet (A) from the second surface (21') to the surface (41); The second holding device (22') and the holding device (42) are configured such that the surface (41) first receives the front portion (Pf) of the sheet (A) and then receives the rear portion (Pr) of the preceding sheet (A), thereby stacking the subsequent sheet (A) on the surface (41) in the first mutual position (MP); The first holding device (22) is configured for a first format (s1), and the second holding device (22') is configured for a second format (s2) different from the first format (s1); and The at least one connecting portion (71, 72, 73, 74) is configured such that the first member (11) and the second member (12) are movable relative to the member (10), and such that the plurality of members (10, 11, 12, 13, 14) are guided from a first arrangement (A1) of the plurality of members (10, 11, 12, 13, 14) to a second arrangement (A2) of the plurality of members (10, 11, 12, 13, 14), in the first arrangement in which the first roller (2) occupies volume (V) and is in the relative first position (RP) and the second roller (2') releases volume (V), in the second arrangement in which the first roller (2) releases volume (V) and the second roller (2') occupies volume (V) and is in the first mutual position (MP), thereby realizing a first format (s1) in the first arrangement (A1) and a second format (s2) different from the first format (s1) in the second arrangement (A2).

2. The multi-format staggered folding machine (100) according to the preceding claim, the multi-format staggered folding machine comprising at least one actuator (81, 82, 83), each actuator causing a corresponding component among the plurality of components (10, 11, 12, 13, 14) to shift, wherein, The at least one actuator (81, 82, 83) is configured to move the plurality of components (10, 11, 12, 13, 14) from the first arrangement (A1) to the second arrangement (A2) and / or from the second arrangement (A2) to the first arrangement (A1).

3. The multi-format staggered folding machine (100) according to claim 1 or 2, wherein, The first roller (2) in the first arrangement (A1) and the second roller (2') in the second arrangement (A2) are arranged relative to the member (10) to transfer the front part (Pf) of the sheet (A) to the same feed area (In).

4. The multi-format staggered folding machine (100) according to any one of the preceding claims, wherein: The first axis of rotation (X1) in the first arrangement (A1) and the second axis of rotation (X2) in the second arrangement (A2) have the same position relative to the member (10); The first roller (2) and the second roller (2') have or substantially have the same outer diameter; The first holding device (22) subdivides the first surface (21) into a first number of portions, the first number of portions defining circumferential angles (α) that are equal or substantially equal to each other, wherein each portion holds a sheet (A). The second holding device (22') subdivides the second surface (21') into a second number of portions, the second number of portions defining circumferential angles (α) that are equal or substantially equal to each other, wherein each portion holds a sheet (A); and The second quantity is different from the first quantity.

5. The multi-format staggered folding machine (100) according to any one of the preceding claims, wherein: The cutting device includes a first bottom blade (30) or a blade, and a cutting roller (3) including a third surface (31) for receiving a sheet (A), a third holding device (32) for the strip and / or sheet (A) on the third surface (31), and at least one blade (33) or bottom blade, which cooperates with the first bottom blade (30) or blade to cut the strip (N) thereby realizing the sequence of the sheet (A); The third component (13) of the plurality of components (10, 11, 12, 13, 14) includes a third seat (13a) that accommodates the cutting roller (3) which is rotatable relative to the third component (13) about a third rotation axis (X3). The moving device is configured to rotate the cutting roller (3) relative to the third member (13) and rotate the first roller (2) relative to the first member (11) such that the tangential velocity of the cutting roller (3) is equal to the tangential velocity of the first roller (2); The moving device is configured to rotate the cutting roller (3) relative to the third member (13) and rotate the second roller (2') relative to the second member (12) such that the tangential velocity of the cutting roller (3) is equal to the tangential velocity of the second roller (2'); In the first arrangement (A1), the first surface (21) and the third surface (31) are separated by a certain distance, such that the first holding device (22) can attract the sheet (A) from the third surface (31) to the first surface (21); In the second arrangement (A2), the second surface (21') and the third surface (31) are separated by a certain distance, such that the second holding device (22') can attract the sheet (A) from the third surface (31) to the second surface (21'); The cutting device is configured to cut a sheet (A) of a first length (L1) or alternatively a second length (L2). The first holding device (22) is configured for the sheet (A) of the first length (L1) in order to obtain the first format (s1); The second holding device (22') is configured for the sheet (A) of the second length (L2) to obtain the second format (s2).

6. The multi-format staggered folding machine (100) according to the preceding claims, wherein, The moving device includes a motor (60), a first gear (61) securely constrained to the first roller (2), a second gear (62) securely constrained to the second roller (2'), and a third gear (63) securely constrained to the cutting roller (3), wherein, in the first arrangement (A1), the third gear (63) engages the first gear (61), wherein, in the second arrangement (A2), the third gear (63) engages the second gear (62), and wherein the motor (60) causes the first gear (61) and the second gear (62) to move via the third gear (63).

7. The multi-format staggered folding machine (100) according to any one of the preceding claims, wherein, The at least one connecting portion (71, 72, 73, 74) includes a first connecting portion (71) and a second connecting portion (72), the first connecting portion restricting the movement of the first member (11) relative to the member (10) along a first path (71a), and the second connecting portion restricting the movement of the second member (12) relative to the member (10) along a second path (72a).

8. The multi-format staggered folding machine (100) according to the preceding claims, wherein, The rotation axis (X), the first rotation axis (X1) and the second rotation axis (X2) are parallel to the first direction (F), the first path (71a) is horizontal and orthogonal to the first direction (F), and the second path (72a) is horizontal and orthogonal to the first direction (F).

9. The multi-format staggered folding machine (100) according to claim 7 or 8, wherein: The at least one connecting portion (71, 72, 73, 74) includes a first rotatable connecting portion (73) which enables the first member (11) to rotate relative to the third member (13) about a predetermined axis of rotation (X73). The first rotation axis (X1) and the predetermined rotation axis (X73) do not coincide, such that the rotation of the first member (11) relative to the third member (13) in the first direction causes the first surface (21) to move from the adjacent position (PP) away from the third surface (31) to the removed position (PD), and the rotation of the first member (11) relative to the third member (13) in the second direction opposite to the first direction causes the first surface (21) to move from the removed position (PD) toward the third surface (31) to the adjacent position (PP).

10. The multi-format staggered folding machine (100) according to claim 9, the multi-format staggered folding machine comprising a guiding device configured to restrict the rotation of the first roller (2) relative to the third member (13) during the rotation of the first member (11) relative to the third member (13), such that after a displacement from the adjacent position (PP) to the removed position (PD) and a displacement from the removed position (PD) to the adjacent position (PP), the first roller (2) has the same orientation relative to the third member (13).

11. The multi-format staggered folding machine (100) according to claim 9 or 10, wherein claim 7 or 8 is subordinate to claim 6, wherein, At the adjacent position (PP), the first gear (61) engages the third gear (63), and at the removed position (PD), the first gear (61) disengages from the third gear (63).

12. The multi-format staggered folding machine (100) according to any one of claims 1 to 6, wherein, The at least one connecting portion (71, 72, 73, 74) includes a rotatable connecting portion (74) that allows the first member (11) and the second member (12) to rotate relative to the member (10) about a predetermined axis of rotation (X74).

13. The multi-format staggered folding machine (100) according to any one of the preceding claims, wherein, The folding device includes a fourth roller (4f) and a fifth roller (5f), and the frame includes: another seat (10b) that houses the fourth roller (4f), which is rotatable relative to the member (10) about a fourth rotation axis (X4); and yet another seat (14a) that houses the fifth roller (5f), which is rotatable relative to the member (10) about a fifth rotation axis (X5).

14. The multi-format staggered folding machine (100) according to any one of the preceding claims, the multi-format staggered folding machine comprising one or more strip deflection rollers (99), wherein, The second component (12) includes one or more seats (99a), each of which accommodates a corresponding strip deflection roller (99).

15. A multi-format staggered folding machine (100) according to any one of the preceding claims, the multi-format staggered folding machine comprising adjustable abutments (95), each adjustable abutment being inserted between the members of the plurality of members (10, 11, 12, 13, 14), wherein, The adjustable abutment (95) is arranged to define the position between at least two of the plurality of components (10, 11, 12, 13, 14) in the first arrangement (A1) and the position between at least two of the plurality of components (10, 11, 12, 13, 14) in the second arrangement (A2).

16. A method for changing the format in a multi-format staggered folding machine (100), the method comprising the steps of: A multi-format staggered folding machine (100) according to any one of the preceding claims is provided; Move one of the plurality of components (10, 11, 12, 13, 14) such that the plurality of components (10, 11, 12, 13, 14) change from the first arrangement (A1) to the second arrangement (A2), thereby achieving at least one displacement of the first component (11) and the second component (12) relative to the component (10), the at least one displacement being guided by the at least one connecting portion (71, 72, 73, 74).

17. The method according to claim 16, wherein, In the providing step, a multi-format staggered folding machine (100) according to claim 9 or any of its dependent claims is provided, and wherein, in the moving step, the first member (11) is first translated, and then the first member (11) is rotated relative to the third member (13) about the predetermined axis of rotation (X73).

18. The method according to claim 16, wherein, In the providing step, a multi-format staggered folding machine (100) according to claim 12 or any of its dependent claims is provided, and wherein, in the moving step, the first member (11) and the second member (12) rotate about the predetermined axis of rotation (X74).

19. The method according to any one of claims 16 to 18, wherein, The first format (s1) is a W-shaped staggered folded sheet packaging body that is folded in a W-shape, and the second format (s2) is a staggered folded sheet packaging body that is folded in a Z-shape, or vice versa.

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