• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention has for its object to provide a device (1) and a method for the exact storage of at least one signature (2) in a stack former. The invention relates to a device (1) for storing (4) at least one signature (2) in the correct position, the device (1) comprising a first transport device (10) in a first plane (12) for transporting the at least one signature (2) in a first transport direction (11), the device (1) comprising a tray (4) on which the at least one signature (2) is deposited on a second level (13) after leaving the first transport device (10) , wherein the second plane (13) is arranged vertically below the first plane (12). The invention also includes a method for operating such a device (1). In the present invention, the device (1) comprises at least one blowing nozzle (20) for at least temporarily holding the at least one signature (2) against gravity.
    公开号:CH715498A2
    申请号:CH01269/19
    申请日:2019-10-04
    公开日:2020-04-30
    发明作者:Sailer Alexander；Stadler Alwin；Knauer Peter
    申请人:Manroland Goss Web Systems Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a device for positionally accurate storage of at least one signature, the device comprising a first transport device in a first level for transporting the at least one signature in a first transport direction, the device being a storage on which the at least one signature is deposited on a second level after exiting the first transport device, wherein the second level is arranged in a vertical extent below the first level. The invention further comprises a method for operating such a device.
    Signatures in the sense of generally printed, folded or unfolded sheets or isolated web sections are often processed into stacks either for further post-processing or for transport. For this purpose, the signatures are usually transported in a transport device either individually or one after the other or as a shingled stream and fed to a stacking device.
    In such a stacking device, the corresponding signatures are superimposed to form a stack. Such stacks are used either to transport mostly identical or similar signatures to a further processing step.
    However, it is possible in particular in connection with printing form variable, digital printing processes such as the inkjet printing process to successively produce signatures with different print contents, both with digital sheet-fed printing presses and with digital web-fed printing presses with a downstream cutting and / or folding unit is possible. Such successive signatures, each with different print contents, can be processed in a process chain to produce more or less finished books for the production of short and very short runs of books or for the “book-on-demand process”.
    Here, the signatures belonging to a book are placed on top of one another in a branch to form a stack, the stack thus produced is then glued, for example on the back, to a book block and provided with a cover.
    For such a stack formation, stacking devices such as offshoots, bar stackers, modified stacker or so-called collators are usually used, in which the signatures are conveyed with a transport device into a so-called collecting shaft or collecting basket with a corresponding storage. The storage surface of the respective signature is usually located in the vertical direction below the transport device, so that the storage of the respective signature on the stack being formed is ensured, regardless of the signature thickness and / or stack height.
    After a respective signature emerges from the transport device, the signature thus falls a more or less large height difference due to its gravity. In order to avoid extremely different drop heights, the tray is usually, although not absolutely necessary, adjustable in height and thus in the vertical distance from the transport device during stack formation. Furthermore, such stack formers have at least one stop in order to enable an exact stopping of the from the transport device at least in the transport direction.
    [0008] However, the known stack formers essentially have two physically determined disadvantages, which lead to a relatively imprecise position of the signatures in the stack relative to the desired position and thus also of the individual signatures to one another:<tb> <SEP> After the signatures have at least partially left the transport device, the signatures bend according to the force of gravity, the deflection depending on the grammage of the printing material, the number of pages, the stiffness of the printing material, etc.
    Furthermore, the signature released by the transport device has a speed component in the horizontal direction and, due to gravity, an increasing speed component in the vertical direction, which results in a parabolic curve movement.
    The stored signature thus bumps against a stop with a vertical and a horizontal speed component and at least tends to rebound, which is considered both on its own, and in particular with the curvature of the signature due to the deflection that occurred before the transport device released it completely leads to a deviation of the position of each signature from the target position and thus leads to an unclean stack.
    In particular, if a book is bound from a stack formed in this way, a high accuracy of the stack and thus an exact position of the signatures relative to one another is imperative, especially in order to avoid slipping of the individual signatures to one another until the stack is finally glued to a book block the individual signatures are fixed to one another with a so-called auxiliary gluing, which is usually applied punctually. Auxiliary gluing of this type has the advantage that the signatures can no longer slip towards one another until the final gluing on the back, but the stacks can no longer be aligned in the sense of book blocks, for example by shaking or tapping.
    The invention is therefore based on the object to provide a device and a method for the precise storage of signatures in a stack former.
    DE 31 07 551 A1 teaches to arrange blowing nozzles in the region of the transport device designed as a double belt conveyor and to arrange suction nozzles rotating in the region of the front deflection rollers.
    [0014] This object is achieved by a device according to claim 1 and a method according to claim 8.
    In the present invention, the device comprises at least one blow nozzle for at least temporarily holding the at least one signature against gravity.
    Similar blowing nozzles are already known in principle from the prior art, but such blowing nozzles are used exclusively for accelerating or decelerating signatures, but not for holding and guiding signatures against their gravity.
    [0017] DE 10 2004 054 044 A1 discloses to accelerate printed products in a folder in the case of lower transport speeds by means of a guide plate, from which air emerges and sweeps along in the transport direction, the product being guided between the guide plate and a belt line.
    The invention has the advantages that the signature can only be held by the at least one blowing nozzle against gravity and thus without an additional device between the signature and the tray and / or the stack and can be guided until it stops Signature only has to cover a small drop height after reaching the horizontal target position. Furthermore, by holding the signature, the signature's deflection due to gravity is avoided, so that the signature can be placed in the flat state on the shelf or on the stack that is being formed.
    In an advantageous embodiment, the blowing nozzle has an extension which is oriented essentially in the direction of the first transport direction. Alternatively, the blowing nozzle can also have an extension which is arranged at an acute angle α to the first transport direction.
    In an advantageous embodiment, the blowing nozzle is designed such that the outlet of the blowing air is designed essentially in the direction of the extension of the blowing nozzle. The blowing air preferably emerges from the blowing nozzle essentially in the direction of the first transport direction. According to the Bernoulli effect, an air flow with an air velocity forms between the respective signature and the blowing nozzle, whereby the air pressure drops in this area, so that the signature is held against gravity due to the unchanged air pressure on the underside of the signature. In addition, blowing air escaping essentially in the transport direction supports the horizontal movement of the signature up to the stop.
    This physical principle is therefore also justified that the at least one blowing nozzle is arranged on the side of the at least one signature which is turned away from the second level, which ultimately means that the at least one blowing nozzle is arranged on the top of the respective signature is.
    [0022] In a particularly preferred embodiment, the device has at least one stop for stopping and / or guiding the at least one signature. At least one stop can be designed to extend in the first transport direction, so that the respective signature can be stopped by the stop in the transport direction and can thus be positioned exactly. The at least one stop preferably has cutouts or interruptions so that the blown air can escape and no air build-up or air swirls can occur in order to avoid a displacement of the respective signatures.
    However, it is also possible and advantageous to attach at least one stop in the direction perpendicular to the first transport direction, so that the respective signature is not only aligned in its position in the first transport direction, but that the signature is also positioned exactly perpendicular to the first transport direction and / or can be aligned. In order to avoid a change in the position of the signature, such a stop can be attached not only on one side of the signature, but also on both sides. The at least stop can also have a vertical extension, irrespective of the arrangement of the respective signature, in order to be able to guide the respective signature even when it descends onto the shelf.
    The present invention also comprises a method for storing at least one signature in the correct position, the at least one signature being transported in a first transport direction with a first transport device located in a first level, the at least one signature after leaving the first transport device is placed on a shelf located in a second level, the second level being arranged vertically below the first level, and the at least one signature after at least partially exiting the first transport device from at least one blowing nozzle against the effect of gravity at least is held temporarily.
    [0025] In an advantageous embodiment, the at least one signature is conveyed along the extent of the at least one blowing nozzle. For this purpose, according to a further advantageous embodiment, the blowing air emerging from the blowing nozzle is blown out of the at least one blowing nozzle in the extension of the blowing nozzle and essentially in the extension of the first transport direction. The physical principle used here has already been described above.
    Thus, as already mentioned above, the blown air can be held against gravity due to the greater prevailing air pressure on the underside of the respective signature.
    Preferably, after the respective, at least one signature of at least one stop has been stopped in its at least one direction of movement, the respective signature can move in addition to the first transport direction in a direction substantially perpendicular to the first transport direction, the at least one signature is after Reaching the desired position or, if applicable, a short time later, no longer held by the blower nozzle against gravity and released by the blower nozzle, so that the respective signature can sink onto the storage area. A stack, such as a book block, can thus be formed by stacking a plurality of signatures on top of one another.
    Holding the at least one signature against gravity can be caused in one embodiment of the invention by interrupting the blown air. As soon as no more blown air emerges from the blower nozzle, there is no longer any air flow, so that the air pressure on the top and bottom of the signature corresponds to that of the environment, whereby the respective signature follows the action of gravity and sinks to the storage area.
    According to an advantageous embodiment, it is also possible that in the case of the supply of a plurality of overlapping signatures in the form of a shingled stream, the at least one signature located in the desired position is replaced by the wake of the trailing or subsequent signatures from the blowing nozzle.
    Due to the overlap of the signatures in a corresponding scale stream, each respective signature is thus only partially covered by the blowing nozzle. The respective subsequent signature is inserted between the signature, which is at least partially covered by the blow nozzle and thus held by the blow nozzle, and the at least one blow nozzle, so that the air film or the air cushion between the at least one blow nozzle and the respective held signature also tears off the consequence that the respective signature drops due to gravity on the shelf.
    [0031] The subsequent signature is then in turn covered, at least partially, by the blowing nozzle and held accordingly.
    However, it is also possible that the holding of the respective signature by the at least one blowing nozzle is terminated against gravity by the discharge of blowing air in an extension essentially perpendicular to the extension of the blowing nozzle. Due to the need for blowing air for the operation and the basic function of the blowing nozzle, it is advantageous to let blowing air emerge from one or a plurality of openings perpendicular to the extension of the blowing nozzle, so that the respective signature is lifted off the blowing nozzle and the air flow in the direction demolition in the first transport direction.
    However, it is also possible that the respective signature held by the blowing nozzle against gravity through at least one mechanical component such as a pin or a plurality of pins emerge from the blowing nozzle and remove the respective signature from the blowing nozzle until the air flow between the blowing nozzle and the respective signature tears off and the corresponding signature drops due to gravity for storage.
    A combination of these methods for terminating the hold by the blow nozzle is also possible or necessary. For example, if the number of signatures belonging to a stack or book block is fed in a stream of shingles, these signatures can be replaced with the exception of the last supplied signature by peeling off by undermining the previous signature, whereas the last signature belonging to this stack should be interrupted Scale flow must be released from the blow nozzle by another previously described method.
    Preferred developments of the invention result from the subclaims and the following description. Various exemplary embodiments of the invention are explained in more detail with reference to the drawings, without being limited thereto. It shows:<tb> Fig. 1 <SEP> a device for forming stacks, as is known from the prior art<tb> Fig. 2 <SEP> a device according to the invention with a blowing nozzle in the extension of the first transport direction<tb> Fig. 3 <SEP> a detailed view of the blow nozzle used<tb> Fig. 4 <SEP> a device according to the invention with a blowing nozzle arranged at an angle to the first transport direction
    Fig. 1 shows the basic structure of a device 1 for forming stacks 3 such as book blocks, for which purpose at least one signature 2 is placed on a shelf 4 with the aim of positioning as accurately as possible, as is known from the prior art is.
    The at least one signature 2 to be filed is transported by means of a first transport device 10, which transports the at least one signature 2 in a first transport direction 11 to the storage area 4 on which the stack 3 is formed. 1 shows that the signatures 2 are occasionally transported one behind the other, but the signatures 2 can also be transported overlapping in the form of a shingled stream.
    The first transport device 10 is drawn as a conveyor belt on which the signatures 2 rest, but the first transport device 10 can also be designed as a belt line, in which the at least one signature 2 is guided by means of preferably a plurality of upper belts and lower belts be.
    The first transport device 10 is located on a first level 12, which is arranged in a vertical extension above the shelf 4 placed on the second level 13. There is a first height difference H between the first level 12 and the second level 13, the second height difference h being decisive for the storage 4 of the signatures 2 on the stack 3. For this reason, the shelf 4 is in many cases height-adjustable, so that the signature 2 fed to the stack 3 via the first transport device 10 preferably only has to overcome the second height difference h up to the shelf 4 on the stack 3.
    To form the stack 3, a plurality of signatures 2, but at least one signature 2, is usually transported in a first transport direction 11 via the first transport device 10 of the tray 4, which can also be configured as a collecting basket or collecting shaft, and fall after exiting from the first transport device 10 onto the tray 4 or the stack 3 already formed.
    In order to obtain a relatively positionally accurate storage 4 of the signatures 2 on the stack 3 and thus a stack 3 stacked as precisely as possible, at least one stop 5 is attached in addition to the storage 4. Although only one stop 5 in the direction of the first transport direction 11 is shown in FIG. 5, a plurality of stops 5 can also be attached in the direction of the first transport direction 11.
    It is also possible, although not shown in FIG. 1, that at least one further stop 5 is attached in an extension perpendicular to the first transport direction 11, so that each signature 2 to be deposited on a stack 3 is also in the direction perpendicular to the first Transport direction 11 can be aligned.
    However, the signatures 2 bend after at least partial exit of the signatures 2 from the transport device in accordance with the acting gravity, which is why in FIG. 1 the signature 2 emerging from the first transport device 10 is shown correspondingly curved.
    Furthermore, the signature 2 released by the transport device has a speed component in the horizontal direction and, due to gravity, an increasing speed component in the vertical direction, which results in a parabolic curve movement.
    The signature 2 placed on the stack 3 thus encounters a vertical and a horizontal speed component against a stop 5 and on the stack 3 and tends to bounce off the stop 5, which is considered both on its own and in particular with the curvature the signature 2, due to the deflection that occurred before the complete release by the transport device, leads to a deviation of the position of each signature 2 from the desired position and thus to an unclean stack 3, which is why the stack 3 shown in FIG. 1 is shown accordingly.
    Fig. 2 shows schematically a device 1 according to the invention for forming stacks 3 by stacking supplied signatures 2. Identical to the prior art described in Fig. 1, the signatures 2 are also here in a first transport direction by means of a first transport device 10 11 on a first level 12 to the collecting shaft shown as storage 4, the height ratios and the first and second height differences H, h being identical to the prior art.
    In contrast to the prior art shown in FIG. 1, seen in the first transport direction 11, a blowing nozzle 20 is attached after the first transport device 10, so that the signature 2 emerging from the first transport device 10 is at least partially covered by the blowing nozzle 20.
    Although only one blowing nozzle 20 is shown in FIGS. 2 to 4, a plurality of blowing nozzles 20 can also be used instead of the one blowing nozzle 20 shown. These nozzles can be arranged one behind the other in the extension of the first transport direction 11 and / or perpendicular to the extension of the first transport direction 11.
    The at least one blowing nozzle 20 is arranged on the side of the at least one signature 2 emerging from the first transport device 10, which is turned away from the second level 13, which ultimately means that the at least one blowing nozzle 20 on the top of the at least one respective Signature 2 is arranged.
    An air flow between the blowing nozzle 20 and the signature 2 is generated by the blowing air 21 emerging from the blowing nozzle 20, which is why the pressure drops there, so that the regular air pressure holds the signature 2 in the vertical direction on the blowing nozzle 20.
    The emerging from the first transport device 10 signature 2 can thus be transported without deflection downwards and without vertical speed component up to the at least one stop 5, which limits the movement of the signature 2 in the extension of the first transport direction 11 and so after Departure of the air flow between the blowing nozzle 20 and the signature 2 slide onto the stack 3 in the vertical direction only due to gravity.
    Due to the lack of deflection of the signature 2 as well as by sinking the signature 2 onto the stack 3 or the tray 4 in only the vertical direction, the signature 2 can thus be guided and filed with a correspondingly high accuracy, which is why the stack 3 is essential has higher stacking accuracy.
    3 shows an enlarged area of the exit of the signature 2 from the first transport device 10, the blowing nozzle 20 and the tray 4 from FIG. 2.
    The blowing nozzle 20 here has an extension on the side facing the signature 2, which is essentially aligned in the direction of the first transport direction 11.
    Furthermore, it is schematically shown in FIG. 3 that the blowing nozzle 20 is designed in such a way that blowing air 21 emerges essentially in the direction of the extension of the blowing nozzle 20. Furthermore, the blown air 21 exits in the direction of the first transport direction 11, so that the signature 2 cannot be deformed or deflected when it enters the air flow.
    Because of this type of outlet and the flow of the blowing air 21, the air in the gap between the at least one blowing nozzle 20 and the signature 2 has a relatively high flow velocity, which is why the air pressure drops in this area according to the Bernoulli equation. Since there are unchanged air conditions on the underside of the signature 2 in the sense of no noticeable flow speed and a normal ambient air pressure, the higher air pressure on the underside of the signature 2 presses the signature 2 evenly against gravity against the blowing nozzle 20 and thus prevents bending as well as a decrease in the signature 2.
    Through the flow direction of the blowing air 21 in the direction of the first transport direction 11, the signature 2 is also supported in its first transport direction 11 until it is securely guided to the stop 5.
    At this point, it should be noted that the representation of the length of the signature 2, the length and arrangement of the blow nozzle 20 shown as well as the positioning of the blow nozzle 20 to the first transport device 10 and the positioning of the blow nozzle 20 to the stop 5 are purely schematic takes place and any length relationships and distances are not to be considered to scale.
    As soon as the signature 2 has reached the stop 5 or a relatively short period of time later, the flow conditions between the at least one blowing nozzle 20 and the corresponding signature 2 are interrupted, for example by interrupting the blowing air supply. Other variants of the interruption of the flow conditions are explained above, such as the interruption in the case of the supply of the signatures 2 in a shingled stream or the discharge of blown air 21 or mechanical components perpendicular to the active surface of the blower nozzle 20.
    The signature 2 released in this way by the blowing nozzle 20 now drops due to the force of gravity the second height difference h according to FIG. 2 in the exclusively vertical direction of movement onto the stack 3 and can thus be guided in a correspondingly clean manner by the at least one stop 5.
    Although not shown in FIG. 3, the at least one stop 5 preferably has cutouts, openings or a rake-like configuration, or at least in the upper area facing the blowing nozzle 20, so that the blowing air 21 emerging from the blowing nozzle 20 is not dammed up by the at least one stop 5, which would result in air turbulence and an influence on the position accuracy of the at least one signature 2 to be filed.
    4 shows an embodiment of the device 1 according to the invention shown in FIGS. 2 and 3. In contrast to the arrangement of the blowing nozzle 20 shown in FIGS. 2 and 3, the blowing nozzle 20 has an extension in the arrangement shown in FIG. 4 which is arranged at an acute angle α to the first transport direction 11. With such an arrangement of the blowing nozzle 20, the signature 2 can already be deflected somewhat in the direction of the tray 4, which is particularly advantageous if the first transport device 10 or in particular the region of the delivery point of the first transport device 10 does not run exactly in the horizontal direction.
    The angle α is usually in a range between 1 ° and approximately 30 ° and should be chosen so that an impact of the signatures 2 on the blowing nozzle 20 is avoided.
    Reference symbol list
    1 device 2 signature 3 stack 4 tray 5 stop 10 first transport device 11 first transport direction 12 first level 13 second level 20 blowing nozzle 21 blowing air H first height difference h second height difference α angle
    权利要求:
    Claims (15)
    [1]
    1. Device (1) for storing (4) at least one position (4), the device (1) being a first transport device (10) in a first plane (12) for transporting the at least one signature (2) in one comprises the first transport direction (11), the device (1) comprising a tray (4) on which the at least one signature (2) is deposited on a second level (13) after leaving the first transport device (10), wherein the second plane (13) is arranged in a vertical extension below the first plane (12), characterized in that the device (1) comprises at least one blowing nozzle (20) for at least temporarily holding the at least one signature (2) against gravity.
    [2]
    2. Device (1) according to claim 1, characterized in that the at least one blowing nozzle (20) has an extension which is oriented essentially in the direction of the first transport direction (11).
    [3]
    3. Device (1) according to claim 1, characterized in that the at least one blowing nozzle (20) has an extension which is arranged at an acute angle α to the first transport direction (11).
    [4]
    4. The device (1) according to claim 1, characterized in that the at least one blowing nozzle (20) is designed for the discharge of blowing air (21) essentially in the direction of the extension of the blowing nozzle (20).
    [5]
    5. Device (1) according to one of the preceding claims, characterized in that the at least one blowing nozzle (20) is arranged on the side of the at least one signature (2) which faces away from the second level (13).
    [6]
    6. Device (1) according to one of the preceding claims, characterized in that the device (1) has at least one stop (5) for stopping and / or guiding the at least one signature (2).
    [7]
    Device (1) according to one of the preceding claims, characterized in that the first transport device (10) is designed as a conveyor belt or as a belt line.
    [8]
    8. Method for storing at least one signature (2) in the correct position, the at least one signature (2) being transported in a first transport direction (11) with a first transport device (10) located in a first plane (12), the at least one after leaving the first transport device (10), a signature (2) is placed on a shelf (4) located in a second level (13), the second level (13) being arranged vertically below the first level (12) , characterized in that the at least one signature (2) is at least temporarily held by at least one blowing nozzle (20) after the at least partial exit from the first transport device (10) against the action of gravity.
    [9]
    9. The method according to claim 8, characterized in that the at least one signature (2) is conveyed along the extent of the at least one blowing nozzle (20).
    [10]
    10. The method according to any one of claims 8 to 9, characterized in that blowing air (21) is blown from the at least one blowing nozzle (20) in the extension of the blowing nozzle (20) and essentially in the extension of the first transport direction (11).
    [11]
    11. The method according to any one of claims 8 to 10, characterized in that the at least one signature (2) is stopped by at least one stop (5) in its direction of movement.
    [12]
    12. The method according to any one of claims 8 to 11, characterized in that the at least one signature (2) is no longer held and released by the blowing nozzle (20) against gravity after reaching the desired position.
    [13]
    13. The method according to claim 12, characterized in that the holding of the at least one signature (2) is caused by an interruption of the blowing air (21).
    [14]
    14. The method according to claim 12, characterized in that in the case of the supply of a plurality of overlapping signatures (2) in the form of a shingled stream, the at least one signature (2) located in the desired position by the trailing of the subsequent signatures (2) from the blow nozzle (20) is replaced.
    [15]
    15. The method according to any one of claims 12 to 14, characterized in that the holding of the at least one signature (2) is terminated by the discharge of blowing air (21) in an extension substantially perpendicular to the extension of the blowing nozzle (20).
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    同族专利:
    公开号 | 公开日
    DE102018125717A1|2020-04-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3107551C2|1981-02-27|1985-08-08|Windmöller & Hölscher, 4540 Lengerich|Device for stacking flat objects|
    DE3418344C2|1984-05-17|1987-08-27|Georg Spiess Gmbh, 8906 Gersthofen, De|
    DE102004054044B4|2004-11-05|2016-06-16|Manroland Web Systems Gmbh|Method and device for transporting flat products|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102018125717.1A|DE102018125717A1|2018-10-17|2018-10-17|Device and method for the exact storage of signatures|
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