EP2465697B1 - Method and device for producing glue-bound print products made from a block and a cover - Google Patents

Description

The invention relates to a method and a device for the production of adhesive-bonded, formed from a book block and an envelope printed products in which the book blocks are guided past in each case in one of several circumferential brackets of an adhesive binder for processing and gluing of their back to processing stations of the adhesive binding device. Subsequently, the envelope is clocked synchronously fed the glued back. In this case, after the merging of the envelope with the book block, a measuring process for detecting a mutual actual position of envelope to book block is provided.

In the industrial production of glued-bound printed products such as magazines, catalogs, paperbacks or similar products, in a first step printed signatures are collected into loose book blocks and then processed in an adhesive binder in the back area, glued and glued to an envelope, ie bound. Fast-moving perfect binders have a plurality of arranged at regular intervals, in a closed path circulating brackets, in which the loose book block clamped in Back longitudinal direction are transported from a supply station to a release station. The drive of the clamps can be effected by a driven by a drive wheel traction means on which the brackets are attached or directly by arranged on the brackets racks, which are drivable via a drive gear. By means of stationary between the feed station and release station processing stations, such as back processing stations, Beleimungsstationen, handling station and press station easily edited with their back area from the brackets down the above book block during promotion. One of the last processing stations in an adhesive binder is the handling station. The accuracy with which the envelopes are attached in the back longitudinal direction relative to the book block, thereby represents an essential quality feature of a bound printed product. The book blocks are aligned exactly after their supply into the brackets in the back longitudinal direction. The envelopes are conveyed by means of a conveyor circulating in a closed path to the merging point of the envelope and book block and are pressed by a pressure station from below to the book block back and side. The drive of the envelope conveyor is connected either mechanically or by means of its own drive synchronously with the drive of the clamps. The achievable accuracy of envelope to book block is significantly affected by errors in the drive means, especially the traction means of the drive means due to manufacturing inaccuracies and wear. In addition, the accuracy can be adversely affected by changing production conditions, such as production speed, glue film thickness, glue application temperature or pressing force of the Umschlaganpressung.

The CH 475098 A5 describes a method in which the position of the envelopes relative to the book blocks is controlled by an adjustment of the feeders of the envelopes to the staples. The feeders are located at a cyclically operating press station and are aligned with the book block after the staple prior to merging the envelope. For this alignment process a relatively short time window is available, so that at high cycle times, the envelope can be deformed by high accelerations and thus the required alignment accuracy is no longer achievable.

The CH 586115 A5 describes a method in which higher beats are possible by referencing an envelope conveyor chain directly to a bracket so that the envelope can be aligned relative to the book block. Although this reduces the accelerations and the associated negative effects on the printed products, this method is not suitable for cycles above 12000 T / h.

In the DE 10221542 A1 Disclosing the preamble of claim 1 or 4, there is disclosed an apparatus in which the staples and at least one processing station are independently drivable. In this case, a measuring system for detecting the position of the brackets or the book blocks in the vicinity of this processing station is provided for their control in the sense of a positioning task. This makes it possible to align a processing station, for example, the envelope feed to the clip, or to the book block.

With such prior art solutions, deviations of the envelopes from the book blocks, caused by tolerances in the drives and traction means for driving the clamps and the envelope feed, can be avoided only prior to their merging. Deviations that occur during and / or after the merging of the envelopes with the book block, can not be detected and compensated with devices of the prior art. Such deviations can be caused, for example, by changing parameters such as the speed of production of the perfect binder, the film thickness or the application temperature of the adhesive or the contact force of the envelope to the book block.

The invention has for its object to provide a method and apparatus for the production of adhesive bound printed products, with which an accurate relative position of the envelope is guaranteed to the book block in the back longitudinal direction even with changed production conditions.

The object is achieved according to the fact that the transfer station has a driver which feeds the envelope to the book block, the actual position of the envelope is compared to the book block with a predetermined target position and in case of deviations of the actual position of the desired position Correction value for a particular pairing of the detected envelope transporting the driver and the book block transported the detected staple is determined. This correction value is stored and prior to the re-occurrence of the particular pairing of driver and clamp, a change in the position of the clamp and / or the driver of this pairing is made corresponding to the correction value.

This method thus makes it possible to correct deviations which are caused both by changing the production conditions and by longer-term drift occurring as a result of the wear of drive elements.

The processing stations have a contact pressure station and a downstream release station. In this method, the actual values determined by the measuring device, which correspond to the respective actual position from cover to book block, are preferably detected downstream of the contact pressure station and particularly advantageously between the contact pressure station and the release station.

In a device according to the invention for producing adhesively bound printed products formed from a book block and an envelope, the transhipment station has a carrier which feeds the envelope to a book block transported in a clamp. In this case, the driver supplying the envelope form and the clip transporting the book block has a certain mating. The adhesive binding device of the device according to the invention also has an evaluation and control unit, in which a predetermined target position of the envelope to the book block storable, comparable to the actual position of the envelope to the book block, a deviation of the actual position of the desired position determined , a correction value for the particular pairing can be determined and stored. Before re-occurrence of the specific pairing of driver and clamp, the evaluation and control unit determines a change in the position of the clamp and / or the driver of this pairing corresponding to the correction value and to a main drive of the clamps connected to the evaluation and control unit. or passed on to a drive device of the transfer station.

In a development of the device, the drive device has a superposition gear connected to a transfer gear via a king shaft and an electric motor.

In another development of the device, the electric motor is designed as a rotation angle-controlled stepper motor or servomotor, which is connected to a motor controller connected to the evaluation and control unit.

The device according to the invention preferably has a reference clock sensor connected to the main drive and a driver sensor for generating a pulse when passing the drivers.

In another embodiment of the device, this has a reference clock generator for generating a pulse on the reference clock sensor at each machine cycle, wherein the reference clock is driven by a reference gear.

In a development of the device, the measuring device is preferably arranged downstream of the contact pressure station and particularly advantageously between the contact pressure station and the release station.

Fig. 1

eine schematische Darstellung einer erfindungsgemässen Vorrichtung in einem ersten Ausführungsbeispiel und

Fig. 2

eine schematische Darstellung einer erfindungsgemässen Vorrichtung in einem zweiten Ausführungsbeispiel,

Fig. 3

einen Ausschnitt des Rückenbereichs eines mit einem Umschlag verbundnen Buchblocks und

Fig. 4

eine Korrekturwerte enthaltende Tabelle.

The invention will be explained below with reference to the drawing and the cited prior art with reference to embodiments. In the drawing show:

Fig. 1

a schematic representation of an inventive device in a first embodiment and

Fig. 2

a schematic representation of an inventive device in a second embodiment,

Fig. 3

a section of the back portion of an associated with an envelope book block and

Fig. 4

a table containing correction values.

As in Fig.1 shown, for the production of adhesive-bound, formed from a book block 1 and an envelope 2 printed products 38 such as books, brochures, magazines, etc., first collected in a collating machine printed products to loose book block 1. Subsequently, the book blocks are bound in a downstream adhesive binding device 3 in the region of the back 4. The adhesive binding device 3 has m in a closed path at regular intervals circumferential, driven by a pulling means 5 brackets 6, where the book block 1 for back processing, gluing and attaching the envelope 2 are supplied. All processing takes place by means of along a conveying path 36 of the brackets 6 fixedly arranged, here only partially illustrated processing stations 37, in which the back 4 down easily be processed from the brackets 6 above book block 1 during its promotion in a conveying direction F. The conveying path 36 corresponds to the path between a feed station, not shown, which feeds the book block 1 in the brackets 6 and a release station 7, in which the bound printed products 38 are removed from the brackets 6. The traction means 5 is driven by a drive wheel 8, which is connected via a drive shaft 9 with a main drive 10 of the adhesive binding device 3.

In a first embodiment of the Fig. 1 For example, the main drive 10 includes a transfer gear 11 and a main motor 12 that drives the transfer gear 11. A handling station 15 essentially formed by a cover feeder 13 and an envelope feeder 14 guides the envelopes 2 in an isochronously controlled manner to the book block 1 by means of a carrier 18 attached to a chain 17 and thus forms one of the last processing stations 37 of the adhesive binding device 3.

By means of a downstream of the transfer station 15 arranged pressing station 24, the envelopes 2 are pressed from below to the back 4 of the book block 1 and laterally to the book block 1, the envelopes 2 and / or the book block 1 are coated with adhesive before pressing. At the end of the conveying path 36 of the clamps 6, i. after the pressing station 24, a measuring device 28 for detecting the mutual position of the envelope 2 and book block 1 along the back 4 is provided. The actual values I determined by the measuring device 28 are transmitted to an evaluation and control unit 19 connected to it, compared with these by a desired value S and calculated correction values K. The formation of the correction values K will be explained after the device description.

In the Fig. 1 and Fig. 2 the measuring device 28 is arranged after the pressing station 24, ie the penultimate processing station 37. However, the measuring device 28 could also be arranged after the release station 7. This can be in the Area of the measuring station 28 located printed product 38 clearly assign a pairing P of a bracket 6 with a driver 18.

The envelopes 2 stacked on each other in a magazine 16 of the envelope feeder 13 are separated by the envelope feeder 13 and transferred to the envelope feeder 14. This has n carrier 18, which are attached to the revolving chain 17 at regular intervals. The chain 17 is driven in a clock-synchronized manner to the clamps 6 by a drive device 20 associated with the envelope feeder 13 and connected to the evaluation and control unit 19. In this case, the drive device 20 is formed from a superposition gear 22 connected to the transfer gear 11 via a king shaft 31 and an electric motor 21. The superposition gear 22 adds, which generated by the superposition gear 22, designed as a servomotor electric motor 21 rotation angle with the rotation angle of the transfer gear 11th

The electric motor 21 is preferably designed as a rotational angle-controlled stepper motor or servomotor, which is connected to a motor controller 23 connected to the evaluation and control unit 19. By using the electric motor 21, corrections can be made to the mutual position of the drivers 18, or of the envelopes 2, to the clamps 6 or the book block 1 clamped in the clamps 6. This is done immediately before the merging of the envelopes 2 with the book block 1 by the pressing station 24. These corrections are based on the determined by means of the measuring device 28 actual position of the envelopes 2 to the book block 1 previously delivered printed products 38th

If the evaluation and control unit 19 is turned off, it loses control of the position of the driver 18 to the brackets 6. After re-switching the evaluation and control unit 19 this is therefore the position of the driver 18 to the brackets 6 not known, thus first printed products 38 are made with undefined position of the envelopes 2 to the book block 1 until after a measurement of the deviations with the measuring device 28, the deviations are compensated by the evaluation and control unit 19.

In order to achieve a defined position of the envelopes 2 to the book blocks 1 already at the beginning of a production, means for a basic adjustment of drivers 18 are provided to the brackets 6. To Fig. 1 a reference clock 32 is driven via a reference gear 35 such that it triggers an impulse at the reference clock sensor 33 at each machine cycle. For synchronization, first the main drive 10 is moved to the position in which the reference clock sensor 33 receives a pulse. Subsequently, the drive device 20 is moved to that position in which the driver sensor 34 receives a pulse. The synchronization can be done with an empty perfect binding device 3, so that the envelopes 2 can already be fed to the book blocks 1 at the correct position in the first printed products 38 to be produced.

In a second embodiment, as in Fig. 2 1, the drive device 20 has a rotational angle-controlled electric motor 21 which drives the chain 17 directly or via a transmission 25 connected therebetween. The main drive 10 drives via a reduction gear 26 exclusively the traction means 5 and the brackets 6 at. For synchronous running of the chain 17 that is the driver 18 to the brackets 6 is connected to the evaluation and control unit 19 connected as a position sensor resolver 27 is provided on the main motor 12, with which the rotational angle position of the main motor 12 is permanently detectable.

On the basis of the rotation angle of the main motor 12, the electric motor 21 follows the main motor 12 in synchronism. The main drive 10 thus constitutes the master drive followed by the drive device 20 as a slave drive. Such systems are also known by the term "electrical wave". Depending on the type of electric motor 21, can also be coupled to the drive shaft, a resolver, which is connected to the evaluation and control unit 19 or the motor controller 23. Analogous to the first exemplary embodiment, a pulse per machine clock is generated in the reference clock sensor 33 by a reference clock, not shown here. The synchronization of the driver 18 with the brackets 6 can also be carried out analogously to the description of the first embodiment.

The following describes a method by which an accurate position of the envelopes 2 to the book blocks 1 in the longitudinal direction of the back 4 is achieved. The actual values I continuously determined by the measuring device 28 are compared with a desired value S entered in an operating unit 29 and stored in the evaluation and control unit 19. The deviations are assigned to the pairings P of the participating brackets 6 and the driver 18. On the basis of these deviations, the evaluation and control unit 19 calculates for the relevant combination of a clamp 6 _m and a driver 18 _n a correction _value K _mn for a pairing P _mn which is stored in a database of the evaluation and control unit 19.

Fig. 4 shows in tabular form the correction _values K _{1.1 ... mn associated with} the pairings P of brackets 6 _1..m and drivers 18 _1..n . On a new adhesive binder device 3, the correction values K _{1.1... Mn} can be set to any desired value since they are automatically corrected during production. It makes sense, however, to set it to a value that corresponds to the actual value I approximately.

If the adhesive binding device has 3 m staples 6 and the chain 17 n driver 18, the maximum possible number of pairings of staples 6 and drivers 18 results as the product of number m of staples 6 multiplied by the number n of drivers 18. Each of these pairings P is in the one computer 30 having or associated with a computer 30 evaluation and control unit 19 associated with at least one memory location in which a previously determined correction value K _{11 mn is} stored, which becomes effective immediately before the next meeting of bracket 6 and driver 18 of the same pairing P.

was einer Proportionalregelung entspricht. Denkbar sind ebenfalls andere aus der Regeltechnik bekannte Regler. Als Referenzmarke R wird ein Impuls innerhalb eines Maschinentaktes angenommen, der mit dem Hauptantrieb 10 direkt oder indirekt erzeugt wird, beispielsweise ein Impuls des Referenztaktsensors 33.In Fig. 3 is the rear portion of a book block 1 with an attached envelope 2 shown. The dimension S corresponds to the desired value S, which the envelope 2 is to protrude above the book block 1, and the dimension I to the actual value I, which is measured by the measuring device 28. The position of the envelope 2 to the book block 1 therefore has a deviation from SI. After each measurement, the correction value K _{11 mn is} recalculated, for example using the following formula: $$\mathrm{correction\; value}\left(\mathrm{New}\right)=\mathrm{correction\; value}\left(\mathrm{old}\right)+\mathrm{Multiplier\; M\; times}\left(\mathrm{S}-\mathrm{l}\right).$$

which corresponds to a proportional control. Also conceivable are other controllers known from control technology. As a reference mark R, a pulse within a machine cycle is assumed, which is generated directly or indirectly with the main drive 10, for example a pulse of the reference clock sensor 33.

The method is then described by way of example with the following assumptions: S = 3 mm; I = 1 mm; K _{4 3} = 3 mm; M = 0.5

The funded with the clip 6 ₄ book block 1 is supplied with the driver 18 ₃ an envelope 2. The valid for this pairing P _{4 3} correction value K ₄₃ is stored in the evaluation and control unit 19. The drive device 20 is adjusted relative to the pulse of the reference clock sensor 33 by K ₄₃ + S = 6 mm. The actual value I measured subsequently on the product is 1 mm and thus the deviation S - I = 2 mm. The new correction value K _{4 3} becomes K _{43 alt} + M * (S - I) = 3 + 0.5 * (3- 1) = 4 mm. At the next time coincidence of the pairing P ₄₃ of bracket 6 ₄ and driver 18 ₃ , the same procedure with the new correction value K _{4 3 is} performed again and so on. The multiplier M can be any value between 0 and 1. With a small multiplier M, the control becomes slower and with a larger multiplier M faster. Preferably, a value of 0.5 is selected for the multiplier M.

The described method can be used to correct deviations caused by changes in the production conditions as well as longer-term drifts caused by wear of, for example, drive elements designed as a chain. For operation and input of relevant parameters, the evaluation and control unit 19 is connected to the operating unit 29.

The use of the method described for the adhesive binder 3 is not limited to this application. It can also be used, for example, for the application of glued envelopes in saddle stitchers in the manufacture of so-called "square backs" or for the attachment of dust covers in dust jacket machines.

Claims (10)

1. Method of producing adhesive-bound printed products (38) formed of a book block (1) and a cover (2), such as books, brochures, magazines, etc., in which the book blocks (1) are each conducted past processing stations (37) of an adhesive binder (3) in one of a plurality of circulating clamps (6) of the adhesive binder (3) for processing and for the application of glue to the spines (4) thereof before a cover (2) is fed in timed synchronism to the glued spine (4) by a cover station (15), wherein, once the cover (2) and the book block (1) have been brought together, a measuring process for determining the relative actual positions of the cover (2) and the book block (1) is provided, wherein

   a) the cover station (15) comprises a pusher (18) that feeds the cover (2) to the book block (1),

   b) the actual position of the cover (2) relative to the book block (1) is compared with a predetermined setpoint position,

   c) in the event of deviations of the actual position from the setpoint position, a correction factor for a specific pairing (P) of the pusher (18) transporting the detected cover (2) and the clamp (6) transporting the detected book block (1) is determined, and

   d) the correction factor is stored,
   characterised in that,

   e) before the specific pairing (P) of pusher (18) and clamp (6) occurs once again, the position of the clamp (6) and/or of the pusher (18) of this pairing (P) is changed in accordance with the correction factor.
2. Method according to claim 1, characterised in that the processing stations (37) comprise a pressing station (24) and a downstream release station (7) and the actual values (I) corresponding to the relative actual positions of the cover (2) and the book block (1) are determined by the measuring device (28) downstream of the pressing station (24).
3. Method according to claim 2, characterised in that the actual values (I) are measured between the pressing station (24) and the release station (7).
4. Device for the production of adhesive-bound printed products (38) formed of a book block (1) and a cover (2), such as books, brochures, magazines, etc., comprising

   a) processing stations (37) for processing and applying glue to the spine (4) of the book block (1) and for placing and pressing a cover (2) on to the book block (1),

   b) a plurality of circulating clamps (6) for conducting the book blocks (1) past the processing stations (37),

   c) a cover station (15) for feeding a cover (2) in timed synchronism to the glued spine (4) of the book block (1), and

   d) a measuring device (28) for measuring the relative actual positions of the cover (2) and the book block (1), wherein

   e) the cover station (15) comprises a pusher (18) feeding the cover (2) to a book block (1) transported in a clamp (6), and

   f) the pusher (18) feeding the cover (2) and the clamp (6) transporting the book block (1) form a specific pairing (P),
   characterised in that

   g) the adhesive binder (3) comprises an evaluation and control unit (19) connected to the measuring device (28), designed to store a predetermined setpoint position of the cover (2) relative to the book block (1), to compare it with the actual position of the cover (2) relative to the book block (1), to detect a deviation of the actual position from the setpoint position and to determine and store a correction factor (K) for the specific pairing (P), wherein, before the specific pairing (P) of pusher (18) and clamp (6) occurs once again, a change in the position of the clamp (6) and/or of the pusher (18) of this pairing (P) corresponding to the correction factor (K) is determined by the evaluation and control unit (19) and is relayed to a main drive (10) of the clamps (6) connected to the evaluation and control unit (19) and/or to a drive device (20) of the cover station (15).
5. Device according to claim 4, characterised in that the drive device (20) comprises a superposition gear (22) connected to a distribution gear (11) by means of a vertical shaft (31) and an electric motor (21).
6. Device according to claim 5, characterised in that the electric motor (21) is designed as a rotation angle-controlled stepper motor or servo motor connected to a motor control unit (23) connected to the evaluation and control unit (19).
7. Device according to one of claims 4 to 6, characterised in that it comprises a reference timing sensor (33) connected to the main drive (10) and a pusher sensor (34) for generating a pulse when passing the pushers (18).
8. Device according to claim 7, characterised in that it comprises a reference timing generator (32) for generating a pulse at the reference timing sensor (33) during each machine cycle, the reference timing generator (32) being driven by means of a reference gear (35).
9. Device according to one of claims 4 to 8, characterised in that the measuring device (28) is arranged downstream of the pressing station (24).
10. Device according to claim 9, characterised in that the measuring device (28) is arranged between the pressing station (24) and the release station (7).

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