Device for forming book blocks

Abstract

Device (1) for stacking printed products (10) to produce a book block (11) from a stream (9) of printed products (10), wherein the stream (9) comprises the printed products (10) of the book block (11) in a sequential arrangement, wherein a book block (11) comprises at least one first printed product (10-1) and a second printed product (10-2), wherein the device (1) comprises: a feeding device (2) for feeding the printed products (10), a collecting device (3) comprising at least one stop (4) for aligning the stacked printed products (10) forming the book block (11), wherein, for forming a book block (11), the at least one first printed product (10-1) and the second printed product (10-2) can be fed to the collecting device (3) for stacking and can be stacked sequentially in the collecting device (3),at least one storage device (5) with a storage surface (6) for storing the at least one first printed product (10-1) and consequently the book block (11) being formed, as well as the formed book block (11) thereon, wherein, for the formation of the book block (11), the at least one first printed product (10-1) and the second printed product (10-2) can be transferred from the feeding device (2) to the collecting device (3), so that the first printed product (10-1) can be stored on the storage surface (6) of the storage device (5) and, after the storage of the at least one first printed product (10-1) on the storage surface (6), the second printed product (10-2) can be stored on the at least one first printed product (10-1), characterized in that the device (1) comprises at least one gluing device (7) arranged in or in the area of ​​the collecting device (3), which is configured such thatthat this applies glue (12) at least at one point on one side (13) of each first printed product (10-1) facing away from the storage surface (6) after the respective first printed product (10-1) has been placed in the collecting device (3).

Description

[0001] The invention relates to a device for stacking printed products to produce a book block from a stream of printed products, wherein the stream comprises the printed products of the book block in a sequential arrangement, wherein a book block comprises at least a first printed product and a second printed product, wherein the device comprises: a feeding device for feeding the printed products, a collecting device comprising at least one stop for aligning the stacked printed products forming the book block, wherein, for the formation of a book block, the at least one first printed product and the second printed product can be fed to the collecting device for stacking and can be stacked sequentially in the collecting device, at least one storage device with a storage surface for placing the at least one first printed product and consequently of the book block in formation and the formed book block on it, wherein, for the formation of the book block, the at least one first printed product and the second printed product can be transferred from the feeding device to the collecting device, so that the first printed product can be placed on the storage surface of the storage device and, after the at least one first printed product has been placed on the storage surface, the second printed product can be placed on the at least one first printed product.

[0002] Various manufacturing processes and, consequently, different equipment are used in book production. For books produced in large quantities, the individual sections, in the form of printed and pre-folded printed products, are generally produced and folded using non-variable-format printing processes, such as offset printing. The various pre-printed and pre-folded sections are then assembled into a book using a collating station. The resulting book block is then glued and / or sewn at the spine, trimmed, and bound with a flexible or rigid cover.

[0003] However, this method is usually only economical for books with medium to very high print runs.

[0004] For books produced in small and very small print runs, the aforementioned traditional manufacturing process is generally not economical. Therefore, such books are produced using the so-called print-on-demand method. In this process, the individual printed products are printed using a variable-plate printing process, separated, usually folded, and fed into a collating unit. The signatures or sheets required for the production of the book block are printed sequentially according to the book's content. Only when a book block is completely printed is the content of the next book block printed, as the already printed products are typically stacked into a book block immediately after printing and an optional folding process.

[0005] Since the book block produced in this way subsequently undergoes various processing stations and procedures, such as trimming the edges, gluing or binding the spine, and attaching a cover, it is advantageous for the book block to receive a so-called auxiliary gluing during or immediately after its production, so that the superimposed printed products cannot change their position relative to each other.

[0006] Various methods for auxiliary gluing in the production of book blocks from sequentially printed products are known from the prior art.

[0007] EP 2 759 070 B2 discloses a method for producing book blocks in which sheets already coated with adhesive are joined together and then folded once or several times around parallel folding edges.

[0008] EP 2 145 773 B1 discloses a method in which the webs printed by means of a digital printing station are brought together and joined along a longitudinal connecting line by means of adhesive, wherein the webs thus joined together are then separated into individual signatures which are joined together to form a book block.

[0009] EP 2 776 252 B1 discloses a method for producing book blocks in which the printed products are stacked on top of each other, with the adhesive required for auxiliary gluing being applied to the material web.

[0010] EP 2 711 193 B1 discloses a method in which sequentially printed printed products are fed to a stacking device in a shingle stream, and in which the adhesive for auxiliary gluing is applied to the printed products running in the shingle stream before the stacking device.

[0011] The methods known from the prior art have in common that the adhesive or glue for the auxiliary gluing of the book blocks is applied to the corresponding signatures well before the formation of the book block.

[0012] However, this early application of glue to signatures that are to be transported and stacked on top of each other has several disadvantages.

[0013] This means the glue can dry out before the book block is formed, which is why adhesives must be used that only set under strong pressure, but this is critical if the auxiliary gluing takes place in the area of ​​the spine and no uniform or sufficiently strong pressure can be applied there.

[0014] Furthermore, the adhesive already applied to the signatures being transported can cause contamination of the corresponding conveyor belts and devices, which requires either a high cleaning effort and / or a high adjustment effort, especially for book blocks of different sizes.

[0015] Furthermore, when applying adhesive to the signatures located in the shingle stream and thus overlapping, it is only possible to apply auxiliary gluing in a very limited area, which can lead to the book blocks being able to open and / or interlock despite auxiliary gluing.

[0016] The invention is therefore based on the objective of finding a solution in which the disadvantages known from the prior art are avoided, so that in particular the transport of printed products already coated with adhesive is avoided and maximum stability of the auxiliary-glued book block is achieved.

[0017] This problem is solved according to the invention by a device in which the device comprises at least one gluing device arranged in the collecting device or in the area of ​​the collecting device, which is designed such that it applies glue at at least one point on a side of each first printed product facing away from the storage surface after the respective first printed product has been placed in the collecting device.

[0018] Such a device has the advantage that the adhesive does not dry out, so that a wide variety of different adhesives can be used.

[0019] Furthermore, no transport routes of the railway or the individual printed products are soiled, which minimizes cleaning and setup efforts for different sizes of book blocks and thus printed products. Additionally, this method makes it possible to apply the adhesive for auxiliary gluing to all edge areas of the printed products and therefore the book block, thus preventing the book block from opening and / or becoming misaligned.

[0020] According to one embodiment of the invention, the gluing device is designed such that no glue can be applied to the second printed product. This allows a multiple stacked book blocks to be produced in a single stacking operation, which positively impacts cycle times and thus output, particularly for book blocks with a low page count. Because there is no adhesive bond between them, the stacked book blocks can be easily separated from one another after stacking using simple technical means.

[0021] According to a further embodiment of the invention, the gluing device comprises at least one glue nozzle which is arranged horizontally and / or vertically offset to the upper edge of the book block being formed.

[0022] This makes it possible to avoid the need for a timed swiveling of the gluing device and / or the glue nozzles, without the gluing device or the glue nozzles interfering with the placement of the printed products into a book block. Depending on the functionality of the gluing device or the glue nozzle in conjunction with the glue, various arrangements can be implemented to ensure a uniform and defined application of glue.

[0023] According to a further embodiment of the invention, the gluing device comprises at least two glue nozzles for applying glue to at least two corners of at least one first printed product of the book block.

[0024] With this design, it is therefore possible to apply the glue simultaneously with a plurality of glue nozzles, preferably at a plurality of glue points, preferably at the corners of the printed products, so that a stably glued book block is achieved which, due to the possible large number of glue points, avoids both opening and interlocking of the auxiliary-glued book block.

[0025] According to a further embodiment of the invention, the gluing device is arranged at a variable distance a from the storage surface.

[0026] Such a design has the advantage that it allows for the production of first printed products of varying heights or numbers using only one gluing device, and / or that it makes it possible to produce a multiple of superimposed book blocks in a single collating process.

[0027] According to a further embodiment of the invention, the distance a between the gluing device and the storage surface is variable in such a way that a distance b of the gluing device to the upper edge of the book block in formation is constant.

[0028] Such a design has the advantage that, when producing a book block by collecting the various printed products, there is always a constant spatial arrangement of the gluing device and the current cover layer of the book block under development, which enables a consistent application of glue and thus a consistent auxiliary gluing across the entire book block.

[0029] According to a further embodiment of the invention, the book block can be pressed using a pressing device after the second printed product has been placed on it.

[0030] This design has the advantage that it allows for an optimal arrangement of the individual printed products relative to each other, that a uniformly dense book block is produced, and that so-called contact adhesives can also be used, which only set under appropriate pressure.

[0031] Preferred embodiments of the invention are described in the dependent claims and the following description. Various exemplary embodiments of the invention are explained in more detail with reference to the drawings, without being limited thereto. These show: Fig. 1 An exemplary bound book, as is known from the prior art Fig. 2 An exemplary book block comprising a plurality of first printed products and a second printed product with auxiliary gluing. Fig. 3. An exemplary book block comprising a first printed product and a second printed product with auxiliary gluing. Fig. 4 An exemplary design of a device for forming book blocks Fig. 5 A section of an exemplary device for forming book blocks with a book block in formation and an obliquely arranged gluing device Fig. 6. A section of an exemplary device for forming book blocks with a finished book block Fig. 7. A section of an exemplary device for forming book blocks, showing a first book block that has been completed and a second book block under construction above it. Fig. 8 A top view of a book block under construction, showing an example of how the glue is applied.

[0032] Fig. Figure 1 shows an exemplary design of a book 16, wherein the book 16 comprises a book block 11 and a cover 15. And wherein the book block 11 comprises a plurality of printed products 10, which, according to the in Fig. The printed product 10, arranged one above the other to form a printed product 10, is glued, sewn, or stapled to the spine 17, so that the cover 15 can also be attached to the spine 17, which is achieved in particular by a Fig. 1. Gluing process not shown separately takes place.

[0033] Depending on the type and design of the cover 15, the book block 11 is partially trimmed before the cover 15 is attached, and the book block 11 is glued or sewn to the future spine 17 accordingly, whereby in some cases the book block 11 is further processed in the area of ​​the future spine 17 before gluing, for example by milling.

[0034] For this reason, it is usually advantageous or even necessary that book block 11 has a Fig. 1 an auxiliary gluing system not shown in the form of a glue 12 applied in spots or lines, so that the individual printed products 10 of the book block 11 are firmly arranged to each other, so that the book block 11 stays together and the individual printed products 10 cannot be moved relative to each other.

[0035] Fig. Figure 2 shows an exemplary design of such a book block, as is known from the prior art.

[0036] Such a book block typically comprises several first printed products 10-1 and a second printed product 10-2. Assuming the book block 11 is assembled from bottom to top, i.e., the individual printed products 10 are stacked on top of each other, each first printed product 10-1 has at least a spot application of glue 12 on its upper side, serving as an auxiliary adhesive. This at least spot application of glue 12 provides at least temporary gluing of the book block 11, ensuring that the individual printed products 10 remain firmly aligned with one another even during the processing steps of the book block 11 described above. The auxiliary adhesive 12 is usually applied to areas that are not used in the subsequent processing of the book block 11, for example, when the book block 11 is trimmed, or in the area of ​​the spine 17.

[0037] Fig. Figure 3 shows an exemplary embodiment of a book block 11 with only one first printed product 10-1 and one second printed product 10-2, wherein glue 12 is applied at least in spots to the top surface of the first printed product 10-1 as an auxiliary adhesive, so that the first printed product 10-1 is bonded to the second printed product 10-2. As shown in Figure 3, the first printed product 10-1 is materially bonded to the second printed product 10-2. Fig. As can be seen from 2, book blocks 11 can also comprise a correspondingly small number of printed products 10.

[0038] Fig. Figure 4 shows an exemplary embodiment according to the invention of a device 1 for stacking printed products 10 for the production of a book block 11.

[0039] The device 1 comprises a feeding device 2, which is located in the Fig. The example shown in section 4 is illustrated as a conveyor belt. Although not in Fig. As shown in Figure 4, the feed device 2 can, for example, also be designed as a belt line known from the prior art comprising an upper belt and a lower belt, wherein both the upper belt and the lower belt consist of a plurality of belt lines arranged side by side, so that the print products 10 or the current 9 of print products 10 can be guided between the belt lines of the upper belt and the belt lines of the lower belt.

[0040] Regardless of the design of the feeder 2, its function is to feed the printed products 10, which are supplied in a stream 9, to the collecting device 3. The printed products 10 supplied by the feeder 2, or the supplied stream 9 of printed products 10, comprise the printed products 10 of the book block 11 in a sequential arrangement. This means that the printed products 10 supplied successively to the collecting device 3, located downstream of the feeder 2, each have different printed content, so that when the successively supplied printed products 10 are stacked, the correct content of a book block 11 is obtained. Consequently, the printed products 10 are typically printed using a variable-format printing process, such as inkjet printing.

[0041] The printed products 10 supplied in a stream 9 can either be, as in Fig. 4 is shown as an example, in which the printed products 10 are fed in a shingle stream, with the printed products 10 partially overlapping in a shingle stream. However, it is also possible, although not in Fig. Figure 4 shows that the printed products 10 are fed to the device 1 in a stream 9 of non-overlapping printed products 10, wherein the printed products 10 may be arranged in a line or may have a more or less large distance between them. Although in Fig. 4. If the printed products 10 are only schematically represented as a line, then the printed products 10 can be unfolded sheets or signatures folded once or several times.

[0042] At the in Fig. In the example shown in 4, the printed products 10 are fed directly from the feeding device 2 to the collecting device 3. The collecting device 3 is located in the Fig. The example shown in section 4 is designed as a collection shaft, such that the collecting device 3 comprises at least one stop 4, wherein the Fig. The 4 exemplary stops 4 align the printed products 10 by resting them against at least one stop 4 and, in addition, also fix the book block 11 in its form or the already completely stacked book block 11 in its shape and position. The in Fig. The 4 stops, shown only schematically, can be designed either as continuous or interrupted sheet metal constructions, as plate-shaped structures, or as rods or tubes arranged side by side, as is the case, for example, with... Fig. 8 is evident.

[0043] Since the representations in the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. Since the figures are only schematic and / or to allow the individual components of the device 1 or a book block 11 to be identified as such, the corresponding components and the corresponding printed products 10 are shown in a highly simplified manner and, in some cases, with exaggerated spacing between them. Although, for example, a relatively large distance is shown between the printed products 10 of a book block 11 or a book block 11 in formation, this serves only to better distinguish the respective components, especially since the glue 12 is also shown disproportionately thick purely for the sake of clarity. The same applies, for example, to the distances shown in the drawing between the book block 11 or the printed products 10 and the stops 4. Although also in the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 Although for the sake of clarity a distance between the book block 11 or the printed products 10 of a book block 11 is shown graphically, it is nevertheless clear and intended that the corresponding printed products 10 or the book block 11 rest against and are aligned with at least one stop 4.

[0044] The printed products 10 fed into the collecting device 3 are thus completely slowed down in the collecting device 3 by means of the at least one stop 4 and come to rest on the storage device 5 aligned by the at least one stop 4 when the printed products 10 are stacked on top of each other in sequential order.

[0045] The storage device 5 comprises a storage surface 6 on which the bottom printed product 10 of a book block 11 is placed and thus comes to rest aligned there due to at least one stop 4. In the case of the Fig. In the example shown in section 4, a first printed product 10-1 is placed on the storage surface 6 of the storage device 5. After this first printed product 10-1 has been aligned on the storage surface 6 by means of the at least one stop 4, and is therefore no longer moving, and only after it has been placed on the storage surface 6, is the Fig. 4 The upper first printed product 10-1 shown is placed on top of the lower first printed product 10-1, so that a book block 11 is formed by sequential arrangement of the printed products 10.

[0046] At the in Fig. In the example shown in section 4, the storage device 5 is designed as a vertically movable stamp, the arrow indicating that the storage device 5 can be moved vertically both downwards and upwards in order to accommodate book blocks 11 of different heights and / or numbers. Although not in Fig. As shown in Figure 4, the storage device 5 can, for example, also be designed as a movable plate, the height of which can be adjusted, for example, by means of chains or at least one threaded spindle. Other deviating designs are also possible, although not in Fig. 4 shown. As briefly outlined above, to form a book block 11, at least one first printed product 10-1 and the second printed product 10-2, which is produced during the in Fig. The printed products 10 are transferred from the feeding device 2 to the collecting device 3 in the phase of book block formation shown in section 4, which is not yet shown. To simplify the transfer of the printed products 10 from the feeding device 2 to the collecting device 3 and to improve the placement accuracy of these products, a device as disclosed in DE 10 2018 125 717 A1 can optionally be used, which, however, is described in section 4. Fig. 4 is not shown.

[0047] Furthermore, the device 1 comprises a gluing device 7, which is arranged in or in the area of ​​the collecting device 3. The gluing device 7 comprises at least one glue nozzle 8 and is designed such that it can apply glue 12 for auxiliary gluing at at least one point on the side 13 of each first printed product 10-1 facing away from the storage surface 6. The gluing device 7 can be attached directly to the collecting device 3, as for example in Fig. Figure 4 is shown as an example. However, it is also possible to arrange the gluing device 7 and thus also the at least one glue nozzle 8 in the area of ​​the collecting device 3, which means that the gluing device 7 is arranged close to or adjacent to the collecting device 3, so that it is nevertheless able to apply glue 12 to the first printed products 10-1, which depends in particular on the arrangement of the glue nozzles 8 to the respective first printed product 10-1, on the glue 12 used as well as on the type of operation and / or the range of the at least one glue nozzle 8, so that the gluing device 7 can be effective in the area of ​​the collecting device 3 and thus in the area of ​​the collecting chute.

[0048] At the in Fig. In the example shown in Figure 4, the gluing device 7 and thus at least one gluing nozzle 8 is arranged on the collecting device 3 or on a stop 4 of the collecting device 3 in such a way that the glue 12 can be applied to the side 13 of each first printed product 10-1 facing away from the storage surface 6, for example by spraying by means of a short pulse.

[0049] After alignment against at least one stop 4 and after placing a first printed product 10-1 on the storage surface 6 of the storage device 5, that is, after the first printed product 10-1 has been aligned and decelerated by the at least one stop 4 of the collecting device 3, consequently coming to a standstill relative to the conveying speed of the feeding device 2 and coming to rest on the storage surface 6 of the storage device 5, glue 12 is applied by the gluing device 7 at at least one point on the side of the first printed product 10-1 facing away from the storage surface 6.

[0050] At the in Fig. In the example shown in Figure 4, the lower first printed product 10-1 was first placed on the storage surface 6 of the storage device 5 after it had been completely decelerated and aligned by the at least one stop 4. After the lower first printed product 10-1 had been placed, glue 12 for auxiliary gluing was applied to the side 13 of the lower first printed product 10-1 facing away from the storage surface 6 at at least one point in the area of ​​the glue nozzle 8, even before the upper first printed product 10-1 was placed on top of the lower first printed product 10-1. After the application of glue 12 to the side 13 of the lower first printed product 10-1 facing away from the storage surface 6, the upper first printed product 10-1 was placed on the lower first printed product 10-1. Fig. 4 upper first printed product 10-1 shown is slowed down at the at least one stop 4, aligned and placed on the lower first printed product 10-1, so that after the upper first printed product 10-1 has been placed, glue 12 is applied to the side 13 of the upper first printed product 10-1 facing away from the placement surface 6 by the gluing device 7 or by the gluing nozzle 8 of the gluing device 7.

[0051] Although not in Fig. As shown in Figure 4, it is also possible that the gluing device 7 comprises a plurality of glue nozzles 8, and that with these additional glue nozzles 8 glue 12 can also be applied at other locations, such as on the surface in Fig. 4. Additional glue 12 is applied to the opposite side of the already applied glue 12. Preferably, at least two glue nozzles 8 are used for applying glue 12, so that glue 12 can be applied to at least two corners of each first printed product 10-1. The use of at least four glue nozzles 8 is particularly advantageous, so that glue 12 can be applied to at least each corner of each first printed product 10-1, as this prevents the book block 11 from opening. In addition, auxiliary gluing at the four corners of each first printed product 10-1 has the advantage that the book block 11 is very dimensionally stable and cannot be twisted or warped, or only minimally so.

[0052] Fig. Figure 5 shows a section of the Fig. 4 device 1 shown, wherein only the feed device 2 is shown in abbreviated form and thus the flow 9 of the printed products 10 is no longer shown.

[0053] Fig. 5 differs in that Fig. 4 by the fact that the at least one glue nozzle 8 of the gluing device 7 is not arranged in a horizontal orientation and thus parallel to the support surface 6 and parallel to the printed products 10, but obliquely above and thus horizontally and vertically offset from the upper edge 14 of the book block 11 being formed. Although not in Fig. As shown in Figure 5, it is also possible that the at least one glue nozzle 8 of the gluing device 7 is arranged only vertically offset from the upper edge 14 of the book block 11 being formed. This arrangement makes it possible to use different types of glue and glue nozzles 8 with different operating principles, with which the glue 12 can be applied in a substantially vertical direction.

[0054] Fig. Figure 6 shows the essentially identical exemplary design of the device as Fig. 5, where in Fig. 6 depicted state on the two lower first printed products 10-1 of the Fig. 5 additionally three further first printed products 10-1 were placed and additionally coated with glue 12 by means of the glue nozzle 8 of the glue device 7 on the side 13 facing away from the storage surface 6 of the storage device 5.

[0055] Furthermore, a second printed product 10-2 was placed on top of the five first printed products 10-1 that were stacked and glued together, and this second printed product was slowed down and aligned by at least one stop 4 of the collecting device 3.

[0056] As from Fig. As can be seen in section 6, no glue 12 was and is applied to this second printed product 10-2 located on top of the book block 11, so that the in Fig. 6 depicted book block 11 the book block 11 of the Fig. 2 with a total of six printed products 10, namely five first printed products 10-1 and one second printed product.

[0057] For this purpose, the gluing device 7 is designed such that it does not apply any glue 12 to the second printed product 10-2 or to every second printed product 10-2, in order to prevent the book block 11 formed in this way from having no glue 12 on either its top or bottom surface, and thus to prevent the book block 11 formed in this way from sticking to other devices or from becoming stuck together when stacked on top of other book blocks 11.

[0058] To prevent glue 12 from being applied to the second printed products 10-2 by the gluing device 7, the device can, for example, have a control device in which the sequence of the book blocks 11 to be produced is stored, so that the glue application by the gluing device 7 is controlled by the Fig. 4. The control device not shown is controlled accordingly.

[0059] However, it is also possible to control the glue application by the gluing device 7 in such a way that, for example, a layer of glue is applied to the first printed products 10-1 to be coated. Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8. To print a brand not shown, which is to be printed by means of a mark in the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 sensor not shown, preferably arranged directly in front of the collecting device 3, is detected, so that the corresponding signals of the detected marks are transmitted via such a sensor either directly to the gluing device 7 or to a device in the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 Control device not shown for controlling the gluing device 7 will be sent.

[0060] However, it is also possible to control the glue application by the gluing device 7 in such a way that, for example, a glue is applied to the second printed products 10-2, which are not to be provided with a glue application. Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8. To print a brand not shown, which is to be printed by means of a mark in the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 sensor not shown, preferably arranged directly in front of the collecting device 3, is detected, so that the corresponding signals of the detected marks are transmitted via such a sensor either directly to the gluing device 7 or to a device in the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 control device not shown for the corresponding control of the gluing device 7 and thus for preventing a glue application.

[0061] As an alternative to the examples above for ensuring that glue is applied exclusively to the first printed products 10-1 placed in the collecting device 3, combinations of the above-mentioned possibilities for controlling the gluing device 7 are also possible, such as printing different marks on the first printed products 10-1 and the second printed products 10-2, in order to send a separate signal to the gluing device 7 for each supplied printed product 10, indicating whether a glue application is required or not.

[0062] Furthermore, the gluing device 7 is preferably arranged at a variable distance a from the storage surface 6 of the storage device 5.

[0063] As from Fig. As can be seen in Figure 5, the glue nozzle 8 of the gluing device 7 has a distance a from the storage surface 6 of the storage device 5. Since the book block 11 continuously gains height as the printed products 10 are stacked to form a book block 11, it is necessary that the book block 11 in formation be lowered to prevent the top edge 14 of the book block 11 in formation from protruding above both the feed device 2 and the gluing device 7, as otherwise neither the depositing of further printed products 10 nor the application of glue 12 by the gluing device 7 would be possible.

[0064] To avoid this, it is therefore necessary either to lower the book block 11 in book block 11 or the book block 11 in formation, or to raise the remaining components of the device 1, in particular the feed device 2, the stop 4 and the gluing device 7.

[0065] During the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. In the exemplary embodiment of such a device 1 shown in Figure 8, this is solved in such a way that the storage device 5 is vertically adjustable, as indicated by the vertical arrows in the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 is symbolically represented. Thus, after the first printed products 10 have been fed in, the depositing device 5 together with the depositing surface 6 is lowered in such a way that the subsequent printed products 10 fed in by the feeder device 2 can continue to be placed on the book block 11 in formation and that the gluing device 7 can apply glue 12 to all first printed products 10-1.

[0066] The adjustment can be made, for example, via the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 threaded spindles not shown, or the storage device 5 can be lowered, for example, via chains not shown in the drawing, the chains being adjustable via sprockets not shown in the drawing.

[0067] In this context, it may be necessary or at least advantageous if the lowering speed is variable, since the increase in the height of a book block in formation 11 depends in particular on the number of printed products supplied per unit of time, the number of pages of the printed products, and the grammage of the printing material used.

[0068] Preferably, the lowering can be carried out in such a way that the upper edge 14 of a book block 11 in formation is lowered by means of a tool inserted into the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 sensor not shown is detected or monitored so that the required lowering speed of the storage device 5 is automatically adjustable and / or controllable.

[0069] In particular, it is advantageous if the distance a between the upper edge 14 of the book block 11 being formed and the gluing device 7 is variable such that the in the Fig. 5, Fig. 6 to Fig. The distance b shown in Figure 7 between the upper edge 14 of the book block 11 under construction and the gluing device 7, and in particular the at least one gluing nozzle 8 of the gluing device 7, is kept constant, which is achieved, for example, with a device described above, but not shown in the figures. Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. The sensor shown in Figure 8 is used to detect the top edge 14. By maintaining such a constant distance b between the top edge 14 of the book block 11 under construction and the glue nozzle 8 of the gluing device 7, a consistently uniform application of glue 12 to the first printed products 10-1 and a consistently uniform placement of all printed products 10 fed into the collecting device 3 onto the book block 11 under construction can be ensured.

[0070] Fig. 7 shows a state in which the in Fig. The book block 11 shown in section 6 was completed and is in Fig. 7 is shown as the lower, first book block 11-1. As from Fig. As can be seen from Figure 7, in one embodiment of the device 1 according to the invention, it is possible to place the printed products 10 of at least one further second book block 11-2 onto a first book block 11-1 located in the collecting device 3 and placed on the storage device 5, wherein the printed products 10 of the upper second book block 11-2 are fed by the feeding device 2 identically to the printed products 10 of the lower first book block 11-1, from which at least one stop 4 is decelerated and aligned and then placed onto the first book block 11-1.

[0071] At the in Fig. Example 7 depicts a state in which the lowest first printed product 10-1 of the second book block 11-2 has been placed on the lower first book block 11-1 after being aligned by at least one stop 4 and completely decelerated. Furthermore, the following was noted: Fig. 7 first printed product 10-1 of the second book block 11-2 also already has glue 12 applied at least at one point to the side 13 facing away from the storage surface 6 by means of the glue nozzle 8 of the glue device 7 for auxiliary gluing.

[0072] This procedure makes it possible to produce a plurality of superimposed book blocks 11 in the collecting device 3, which in particular increases the cycle times and thus the throughput, especially for book blocks 11 with a small number of pages.

[0073] Although not in the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. As shown in Figure 8, it is possible that the at least one book block 11 completed in the collecting device 3 is transferred to a transport device for removal from the device 1 and is conveyed by this device out of the device 1 to form book blocks 11, so that the book blocks 11 can either be stacked or given for further processing.

[0074] It is also not shown in the figures that the device 1 optionally includes a separating device (not shown in the drawing) in the area of ​​the feed device 2 or between the feed device 2 and the collecting device 3 for temporarily retaining the printed products 10 in the flow 9. Such a separating device makes it possible to briefly interrupt the feed of printed products 10 into the collecting device 3, which can be helpful when the at least one book block 11 is being conveyed out of the collecting device 3 by temporarily retaining the printed products 10 fed by the feed device 2 using mechanical elements such as adjustable grippers or adjustable stops.

[0075] Although not in the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. As shown in Figure 8, it is also possible that a completed book block 11 or several superimposed book blocks 11 can be joined by means of a device inserted into the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 pressing device not shown, so that air trapped in the book blocks 11 can escape and / or that it is ensured that the applied glue 12 for auxiliary gluing comes into contact with the adjacent printed products 10 at all points and / or that, in particular with contact adhesives, curing takes place by applying sufficient pressure.

[0076] Such a pressing device can either be integrated into the collecting device 3, for example by pressing on the at least one book block 11 with a stamp not shown in the figures, or by, for example, the storage device 5 against one in the Fig. 5 stamps not shown are used.

[0077] Alternatively, it is also possible to carry out the pressing of the book blocks 11 in the transport device not shown in the drawing or in a separate pressing device not shown in the drawing.

[0078] Fig. Figure 8 shows an exemplary embodiment of a collecting device 3, but without the feeding device 2, wherein the feeding direction of the printed products 10 is indicated in Fig. 8 contains an arrow.

[0079] As from Fig. As can be seen in Figure 8, according to an exemplary embodiment of the collecting device 3, this device can comprise a plurality of tubular or rod-shaped stops 4, which must be adjusted to the corresponding format, that is, to the dimensions of the printed products 10. In the case of the Fig. In the exemplary embodiment 8, two cylindrical stops 4 are arranged on each edge of a printed product 10, so that each printed product 10 can be precisely aligned in its position in the book block 11, ensuring that the printed products 10 are exactly aligned on top of each other in a book block 11.

[0080] At the in Fig. In the variant shown in Figure 8, the adhesive device 7 comprises four adhesive heads 8, namely a first adhesive head 8-1 at the upper right corner of the first printed product 10-1 or the book block 11, a second adhesive head 8-2 at the lower right corner of the first printed product 10-1 or the book block 11, a third adhesive head 8-3 at the lower left corner of the first printed product 10-1 or the book block 11, and a fourth adhesive head 8-4 at the upper left corner of the first printed product 10-1 or the book block 11. These four adhesive heads 8 make it possible to apply adhesive 12 to all four corners of the first printed product 10-1: a first application of adhesive 12-1 at the upper right corner, a second application of adhesive 12-2 at the lower right corner, a third application of adhesive 12-3 at the lower left corner, and a fourth application of adhesive 12-4 at the upper left corner of the first printed product 10-1. Printed product 10-1.The glue heads 8 can be used either horizontally, similar to the design in . Fig. 4 or vertically and / or horizontally offset, comparable to the design in Fig. 6 be arranged.

[0081] Thus, with the present solution, it is possible to apply glue 12 for temporary gluing to all four corners of a first printed product 10-1, and therefore to all four corners of a book block 11, so that a secure temporary gluing of the book block 11 is possible, whereby the book block 11 can remain closed for further processing steps and which ensures high dimensional stability of the book block 11. In the area of ​​the edges of a book block 11, the temporary gluing is also not disruptive, since these areas are cut off until the book is finished. Reference symbol list 1 Device 2 Feeding device 3 Collecting device 4 stops 5 Storage device 6 storage areas 7 Glue device 8 glue nozzle 9 Electricity 10 printed product 11 Book block 12 glue 13. Far-facing side 14 Top edge 15 Cover Book 16 17 book spines a distance b distance QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 2 759 070 B2

[0007] EP 2 145 773 B1

[0008] EP 2 776 252 B1

[0009] EP 2 711 193 B1

[0010] DE 10 2018 125 717 A1

[0046]

Claims

[1] Device (1) for stacking printed products (10) for producing a book block (11) from a stream (9) of printed products (10), wherein the stream (9) comprises the printed products (10) of the book block (11) in a sequential arrangement, wherein a book block (11) comprises at least one first printed product (10-1) and a second printed product (10-2), wherein the device (1) comprises: a feeder (2) for feeding the printed products (10), a collecting device (3) comprising at least one stop (4) for aligning the stacked printed products (10) forming the book block (11), wherein, for forming a book block (11), the at least one first printed product (10-1) and the second printed product (10-2) can be fed to the collecting device (3) for stacking and can be stacked sequentially in the collecting device (3),at least one storage device (5) with a storage surface (6) for depositing the at least one first printed product (10-1) and consequently the book block (11) in formation, as well as the formed book block (11) thereon, wherein, for the formation of the book block (11), the at least one first printed product (10-1) and the second printed product (10-2) can be transferred from the feed device (2) to the collecting device (3), so that the first printed product (10-1) can be deposited on the storage surface (6) of the storage device (5) and, after the at least one first printed product (10-1) has been deposited on the storage surface (6), the second printed product (10-2) can be deposited on top of the at least one first printed product (10-1). characterized by, that the device (1) comprises at least one gluing device (7) arranged in the collecting device (3) or in the area of ​​the collecting device (3), which is designed such that it applies glue (12) at at least one location on a side (13) of each first printed product (10-1) facing away from the storage surface (6) after the respective first printed product (10-1) has been placed in the collecting device (3). [2] Device (1) according to claim 1, characterized by , that the gluing device (7) is designed in such a way that no glue (12) can be applied to the second printed product (10-2). [3] Device (1) according to one of claims 1 to 2, characterized by , that the gluing device (7) comprises at least one gluing nozzle (8) which is arranged horizontally and / or vertically offset to an upper edge (14) of the book block (11) being formed. [4] Device (1) according to any one of claims 1 to 3, characterized by, that the gluing device (7) comprises at least two glue nozzles (8) for applying glue (12) to at least two corners of at least one first printed product (10-1) of the book block (11). [5] Device (1) according to any one of claims 1 to 4, characterized by , that the gluing device (7) is arranged at a variable distance a from the storage surface (6). [6] Device (1) according to claim 5, characterized by , that the distance a is variable such that a distance b of the gluing device (7) to the upper edge (14) of the book block (11) in formation is constant. [7] Device (1) according to any one of claims 1 to 6, characterized by , that the book block (11) can be pressed using a pressing device after the second printed product (10-2) has been placed.

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