EP1834805B1 - Device and method for pressing a cover to a moving printing substrate block - Google Patents

Description

The present invention relates to a device for pressing an envelope on a moving substrate block with the features of the preamble of claim 1. Furthermore, the present invention relates to a method for pressing an envelope to a moving printing block with the features of the preamble of claim 8.

Adhesive binding machines are used to bond a previously assembled signature stack using adhesives (eg, cold glue or hot melt adhesives). Optionally, it can be used before applying the adhesive machining back machining. The adhesive application can be made on a book block or on an envelope. In addition to the gluing of the block spine, the side areas of the book block that are close to the block spine can be glued in addition.

• eine zum Anpressen des Umschlags an den Rücken vertikal bewegbare, an einer Tragplatte befestigte Rückenanpressplatte;
• an der Tragplatte horizontal verschiebbar gelagerte, zum Anpressen an rückennahen Seitenflächen von einer Betätigungseinrichtung gesteuert bewegte Seitenanpressschienen, wobei die Rückenanpressplatte und die Seitenanpressschienen in zyklischer Vor- und Rückbewegung beim Anpressen synchron zum Buchblocktransport vorbewegbar sind und bei der Rückbewegung mit Abstand zum Rücken geführt sind;
• Koppelstangen, die in Gelenkpunkten außerhalb der vor- und zurückbewegten Tragplatte angelenkt sind und mit dem anderen Ende direkt oder über ein mit der Tragplatte mitbewegtes Zwischengetriebe mit den Seitenanpressschienen gelenkig verbunden sind, und dass die außerhalb liegenden Gelenkpunkte längs der Förderrichtung des Buchblocktransportsystems verschiebbar gesteuert sind.

From the DE 102 27 950 A1 a Umschlaganlege- and Umschlaganpresseinrichtung for applying and pressing an envelope to a continuously transported in the conveying direction book block with the following features:

• a Rückenanpressplatte for attaching the envelope to the back vertically movable, attached to a support plate Rückenanpressplatte;
• horizontally displaceably mounted on the support plate, for pressing on the rear side surfaces controlled by an actuator Seitenanpressschienen, the Rückenanpressplatte and Seitenanpressschienen in cyclic forward and backward movement during pressing synchronous to the book block transport are forward and are guided in the return movement at a distance to the back;
• Coupling rods, which are articulated in articulation points outside of the front and moved back support plate and are connected to the other end directly or via a moving with the support plate intermediate gear with the Seitenanpressschienen, and that the outboard hinge points are slidably controlled along the conveying direction of Buchblocktransportsystems.

Another prior art to Umschlaganlegem is in the DE 33 40 859 C1 , of the DE 37 41 989 A1 , of the CH 433 186 , and the US 4,153,963 described.

Furthermore, from the CH 407 044 A a device for applying envelopes to the backs of book blocks, in which between a Umschlagschrägfördervorrichtung and the horizontal Buchblockförderbahn a transfer rocker is arranged with plan support.

From the EP 0 917 965 A1 a saddle stitcher is known in which the folded sheet feeder are equipped with single drive units.

From the JP 2000168264A a device for pressing the envelope to the book block is known.

The EP 0 384 129 A2 discloses a book forming and pressing machine in which the press plates are driven by special lever systems.

The mechanical elements of the multi-element cam and / or linkage are subject to tolerances and not free of play and are subject to wear due to the heavy load.

In order to achieve the desired quality in terms of positional accuracy of the cover to the book block and durability of the perfect binding, movement sequences and contact pressures must correspond very closely to the technological specifications. Due to the additionally increased requirement to be able to process different materials (back-adhesive materials and cover materials) with very different properties (eg bending stiffness, formability), an adaptation of the process steps "pressing on the block spine" and "pressing on the block side" has become necessary ,

It is therefore an object of the present invention to provide an improved over the prior art device, which overcomes at least one of the disadvantages of the prior art and satisfies the increased demands on the product quality to be achieved.

It is another object of the present invention to provide a method which is improved over the prior art, which overcomes at least one of the stated disadvantages of the prior art and satisfies the increased demands on the product quality to be achieved.

These objects are achieved by a device having the features of claim 1 and by a method having the features of claim 8.

Advantageous developments of the invention will become apparent from the dependent claims and from the following description and the accompanying drawings.

An inventive device for pressing an envelope on a moving in a transport direction printing material block, with a in a first direction movable first pressing element and at least one movable in a first transverse direction to the second direction second pressing element is characterized in that the device comprises a drive unit which is acted upon or acted upon via a connection to a control unit with a variable control profile.

The inventive provision of a drive unit which can be acted upon by a variable control profile, d. H. a variable or exchangeable control profile is provided to the drive unit, is achieved in an advantageous manner, the process of pressing, in particular the movement profile (preferably web profile of the movement and speed profile of the movement and force profile or pressure profile during pressing) of the second contact element on to adapt the product to be processed or manufactured. As a result, products of better quality can be produced.

An advantageous and therefore preferred development of the device according to the invention may be characterized in that the drive unit comprises a servomotor, a spindle and a displaceable element, or a linear servomotor.

A further advantageous and therefore preferred development of the device according to the invention may be characterized in that the drive unit is mechanically decoupled from a drive for moving the first contact element and / or from a drive for moving the printing material block.

A further advantageous and therefore preferred development of the device according to the invention may be characterized in that the device comprises a coupling rod which transmits the movement generated by the drive unit to the second pressing element.

A further advantageous and therefore preferred development of the device according to the invention may be characterized in that the drive unit and / or the second pressing element via the connection sends a feedback message to the control unit for checking, adjusting and / or correcting the control profile.

A further advantageous and therefore preferred development of the device according to the invention may be distinguished by the fact that the first pressing element is a pressing table movable in the vertical plane, that the second pressing element is a pressing rail movable in the horizontal plane, that the device comprises a third pressing element is also a movable in the horizontal plane pressing bar, and that two drive the two pressure rails drive units comprise a respective acted upon by a variable control profile servomotor.

In the context of the invention, a printing material processing machine, in particular an adhesive binder or a pressure station of an adhesive binder can be seen, which is characterized by at least one device as described above with reference to the invention.

A method according to the invention for pressing an envelope against a printing material block moved in a transport direction, the envelope being pressed against the printing substrate block by a first pressing element which is movable in a first direction and by at least one second pressing element which is movable in a second direction substantially transversely to the first direction, is characterized by the fact that the movement in the second direction takes place as a function of a variable control profile.

When carrying out the method according to the invention, there are advantages as already described above with reference to the device according to the invention.

An advantageous and therefore preferred development of the method according to the invention may be characterized in that the pressing with the second pressing element is mechanically decoupled from the pressing with the first pressing element.

A further advantageous and therefore preferred development of the method according to the invention can be distinguished by the fact that the control profile is checked, adjusted and / or corrected in response to feedback from the second pressing element or a drive unit assigned to it.

The described invention and the described, advantageous developments of the invention are also in any combination with each other advantageous developments of the invention.

The invention and further, structurally and functionally advantageous developments of the invention will be described below with reference to the accompanying drawings with reference to at least one preferred embodiment.

The drawing shows:

FIG. 1:

A perspective view of a device according to the invention.

FIG. 1 shows a device 1 according to the invention. The device 1 is preferably used in an adhesive binding machine 100, as a detail of which the device 1 is shown by way of example, for the production of brochures or so-called softcover products. However, the device 1 is also in other machines, eg. B. in Vorsatzbogenanklebemaschinen, for the production of book block for so-called hardcover products used. The device 1 can also be designed as part of a contact pressure station 110 of the machine 100.

One of collected signatures, z. B. paper sheets, existing printing block or book block 2 (hereinafter referred to as block) is held or clamped in a transport tongs 4 and performed or conveyed by the forceps 4 in the transport direction 6 along a straight line with substantially uniform speed.

At the machine position of the device 1, an envelope 8 is preferably pressed or pressed from below in the vertical direction (upward) to the block 2 and thereby connected to the back 10 of the block 2, preferably glued or glued. The back 10 and / or the envelope 8 is previously, ie in an upstream station of the machine 100, with adhesive or glue, z. B. with hot melt adhesive or with cold glue, provided by applying. The term "envelope" is understood in this application not only an envelope as such, but also any other flexible and flat Object, e.g. B. a header sheet, a Fälzelmaterial or other Hinterklebematerial.

The pressing of the envelope 8 is effected by a vertical movement 12 (up and down movement) of a frame 13, a first pressing (or pressure plate) 16, in particular a Anpresstisch 16, along the rails 14 of the device 1, whereby the necessary pressure for the connection of envelope 8 and block 2 is generated.

In order to follow the transport movement of the block 2 during pressing, the Anpresstisch 16 is mounted as a carriage on a rail 18 of the frame 13 and movable or displaceable. The Anpresstisch 16 performs during pressing a horizontal movement 20 (forward and backward movement), which takes place parallel to the transport direction 6 and during the forward movement with uniform, the transport speed of the block 2 corresponding speed. The pressing is thus done during a synchronization phase between the transported block 2 and the moving Anpresstisch 16th

Since the envelope 8 is connected to the block 2, except in the region of the back 10, also in the back near side regions of the block 2, the application of the adhesive or glue (in the upstream station of the machine 100) also takes place in these side regions.

The lateral pressing of the envelope 8 in the side areas is effected by a transverse movement 22 of at least one second pressing element 24, or a second and third pressing member 24 (Aufeinanderzu- and Voneinanderwegbewegung), in particular of respective lateral pressure rails 24 on each side of the device 1 and the block 2. For this purpose, the Anpressschienen 24 are mounted on respective rails 30 of the Anpresstischs 16 and movable or displaceable. The distance between the pressure rails 24 to each other is initially greater by a desired amount than the block thickness (expansion of the block 2 transverse to the transport direction 6). This so-called "inlet width" (corresponds to the block thickness plus twice the lateral inlet clearance between block 2 and pressure rail 24) is over a certain travel of the Anpresstischs 16 (in a first phase of the lateral pressing) in Maintained essentially constant. Thereafter (in a second phase of lateral pressing), the pressing rails 24, which are in synchronism with the block 2, move towards one another and press the envelope laterally.

By the superposition of the vertical movement 12 with the horizontal movement 20 of the Anpresstisch 16 performs a web movement 26. Furthermore, the Anpressschienen 24 perform by the superposition of the horizontal movement 20 with the transverse movement 22 respective opposing path movements 28, the web movements 28 are still superimposed with the web movement 26 ,

The generation of the contact movement (transverse movement) of the respective pressure rails 24 is preferably carried out by a respective, preferably fixedly arranged or frame-fixed (with respect to the frame 31 of the device 1) drive unit 32 on each side of the device 1, d. H. Each pressing bar 24 is preferably assigned its own drive unit 32.

The drive unit 32 comprises a preferably separately controllable servomotor 34 which drives a rotatable spindle 36 (eg via a toothed belt or other transmission means (not shown for the sake of clarity). The rotational movement of the spindle 36 introduced by the servomotor 34 is translated (via a spindle nut, not shown for the sake of clarity, in the interior of a displaceable element 38) into a controllable transverse movement 22 of the displaceable element 38.

As an alternative to the described cost-effective drive unit 32 with servomotor 34 and linear unit of spindle 36 and displaceable element 38, a drive unit 32 with a linear servomotor 34 'can also be used.

On the displaceable element 38, a coupling rod 40 is articulated at its first, drive-side end which transmits the transverse movement 22 from the drive unit 32 or from the displaceable element 38 to the pressure rail 24 assigned to it. For this purpose, the coupling rod 40 is further articulated at its second, output-side end to its associated Anpressschiene 24. The drive-side pivot point 42 of the coupling rod 40 is thus corresponding to the controllable Transversal movement 22 of the displaceable element 38 controlled slidably. Preferably, the drive-side hinge point 42 is in the lateral direction (transverse to the transport direction 6) outside the range of the horizontally moving (forward and backward movement) Anpresstischs 16th

An electronic control unit 120 is in contact with the two servomotors 34 via a connection 124, for example via cable connection (wired) or wireless connection (wireless), and acts on the servomotors 34 with electronic control profiles 122, which represent movement profiles of the associated contact pressure rails 24. Preferably, the two servo motors 34 are acted upon by the same control profile 122. However, it is also possible to assign the two servomotors 34 different control profiles 122, z. B. if the block thickness is not symmetrical to the device 1 builds.

The control profiles 122 can be prepared in an electronic memory and assigned to predetermined processing jobs. Additionally or alternatively, the control profiles 122 may vary depending on predetermined processing jobs, i. H. depending on certain parameters such. B. movement or movement profile of the Anpresstisches 16, block thickness, offset, inlet width, contact pressure, Anpresslänge and / or contact pressure or contact pressure, individually calculated. Furthermore, each of the two servomotors 34 may have its own, preferably integrated control unit 120.

The servo motors 34 can deliver feedback messages to the control unit 120 via the existing connection 124, so that the control profiles 122 can also be checked, adjusted and / or corrected. The connection 124 may alternatively include two separate connections for the transmission of the control profile 122 and for the feedback.

The contact pressure achieved is, apart from the mechanical parameters of the device 1 directly dependent on certain material parameters, for example, the total thickness of block 2 with envelope (corresponds to the block thickness plus twice the envelope thickness). If these material parameters fluctuate during production, the contact pressure actually achieved by the lateral pressure rails 24 changes corresponding. By feedback of the actually achieved contact pressure, which z. B. can be determined by the load current of the servo motor 34, to the control unit 120 corrections to the control profile used 122 can already be made during the current production.

Furthermore, the control unit 120 may receive signals or data from sensors that determine the material parameters, e.g. As the block thickness or the lateral position of the block or the block sides to capture during ongoing production. Thus, the current control profile 122 can already be checked, adjusted and / or corrected during the current production, preferably in real time, so that each individual block 2 is optimally provided with an envelope 8.

Under the control of the control unit 120, the movement of the pressure rails 24 takes place in such a way that one or more of the following parameters are taken into account: movement or movement profile of the pressure table 16, block thickness, offset, inlet width, contact position, contact length and / or contact force or contact pressure.

The invention is also based on the idea of known in the art drives, z. B. cams, for contact rails and their associated mechanical actuating devices, eg. B. eccentric, to simplify and summarize their functions (drive and adjustment) in one unit. By combining the functions in one unit, in this embodiment in the drive unit 32, and by providing a control of the unit, in this embodiment by the control unit 120, it is possible in an advantageous manner, the Anpressschienen in a simple manner and with little technical To act on funds with any movement profiles and thus to control targeted in their movement.

The invention is also based on the idea that provided in the prior art mechanical coupling of the transverse movement of the Anpressschienen to other movements, eg. As to the transport movement of the blocks or to the horizontal movement or vertical movement of Anpresstischs, or to decouple the transverse movement.

• Gegebene Möglichkeit sowohl den Hub als auch den Hubverlauf der seitlichen Anpressschienen variabel einstellen zu können;
• Gegebene Möglichkeit die zur Maschinengeschwindigkeit umgekehrt proportionalen, maximal nutzbaren Zeitfenster für den Anpressvorgang im Wesentlichen vollständig und optimal zu nutzen;
• Gegebene Möglichkeit der Reduzierung der bewegten Massen und der Bauteileanzahl. Damit einhergehend Reduzierung von Spiel in den Übertragungsgliedern und somit höhere Genauigkeit der gewünschten Bewegung der seitlichen Anpressschienen;
• Gegebene Möglichkeit der zusätzlichen Verlängerung der Prozesszeiten für das seitliche Anpressen bei Maschinengeschwindigkeiten unterhalb der Nenngeschwindigkeit durch veränderbare Steuerzeiten;
• Gegebene Möglichkeit der Steigerung der Prozesssicherheit durch Einstellenmöglichkeit der Prozessgrößen Pressdruck und/oder Presskraft und damit einhergehende Verbesserung des Endproduktes; und/oder
• Gegebene Möglichkeit der Verringerung der Bauteilbelastung durch Einstellen der Anpresskraft in Abhängigkeit von Materialeigenschaften und zu verpressender Klebefläche.

The device 1 according to the invention and its use as well as the method according to the invention lead to the following further advantages:

• Given possibility to be able to set both the stroke and the stroke profile of the lateral pressure rails variable;
• Given possibility to use the machine speed inversely proportional, maximum usable time window for the Anpressvorgang substantially completely and optimally;
• Given possibility of reducing the moving masses and the number of components. This concomitantly reduction of play in the transmission links and thus higher accuracy of the desired movement of the lateral pressure rails;
• Given possibility of additional extension of the process times for lateral pressing at machine speeds below the rated speed by means of variable control times;
• Given possibility of increasing the process reliability by adjusting the process variables pressing pressure and / or pressing force and concomitant improvement of the final product; and or
• Given possibility of reducing the component load by adjusting the contact force as a function of material properties and to be pressed adhesive surface.

LIST OF REFERENCE NUMBERS

1

contraption

2

block

4

tongs

6

transport direction

8th

envelope

10

move

12

vertical movement

13

frame

14

rails

16

first pressing element / pressure table

18

rail

20

Horizontal movement

22

transversal

24

second and third pressing element / contact rails

26

orbital motion

28

orbital motion

30

rails

31

frame

32

drive units

34

servomotors

34 '

Linear servo motors

36

spindles

38

movable elements

40

coupling rods

42

pivot points

100

Perfect binding machine

110

pressing station

120

control unit

122

control profiles

124

Compound / compounds

Claims (10)

1. An apparatus for pressing a cover (8) onto a printing material block (2) that is moved in a transport direction (6) having a first pressing element (16) that can be moved in a first direction (12) and at least one second pressing element (24) that can be moved in a second direction (22) which is substantially transverse to the first direction (12), wherein said apparatus (1) comprises a drive unit (32) to which a variable control profile (122) can be applied via a connection (124) to a control unit (120).
2. The apparatus according to claim 1, wherein that drive unit (32) comprises

   - a servo motor (34), a spindle (36) and a displaceable element (38), or

   - a linear servo motor (34').
3. The apparatus according to claim 1, wherein said drive unit (32) is mechanically decoupled from a drive for moving said first pressing element (16) and/or from a drive for moving the printing material block (2).
4. The apparatus according to claim 1, wherein that apparatus (1) comprises a coupling rod (40) which transmits the movement (22) produced by said drive unit (32) to said second pressing element (24).
5. The apparatus according to claim 1, wherein said drive unit (32) and/or said second pressing element (24) sends feedback to said control unit (120) via the connection (124), enabling the control profile (122) to be checked, adapted, and/or corrected.
6. The apparatus according to claim 1, wherein

   - said first pressing element (16) is a pressing table (16) that can be moved in the vertical plane,

   - said second pressing element (24) is a pressing rail (24) that can be moved in the horizontal plane,

   - said apparatus (1) comprises a third pressing element (24) which is also a pressing rail (24) that can be moved in the horizontal plane, and

   - said two driving units (32) driving the two pressing rails (24) respectively comprise a servo motor (34, 34') to which a variable control profile (122) can be applied.
7. A printing material processing machine, in particular adhesive binder (100) or pressing station (110) of an adhesive binder, characterized by an apparatus according to one of the claims 1 to 6.
8. A method for pressing a cover (8) onto a printing material block (2) that is moved in a transport direction (6), said cover (8) being pressed onto the printing material block (2) by a first pressing element (16) that is moved in a first direction (12) and by at least one second pressing element (24) that can be moved in a second direction (22) that is substantially transverse to the first direction (12), wherein the movement in the second direction (22) occurs as a function of a variable control profile (122).
9. The method according to claim 8, wherein carrying out the step of pressing with said second pressing element (24) is mechanically decoupled from the step of pressing with said first pressing element (16).
10. The method according to claim 9, wherein said control profile (122) is checked, adapted and/or corrected as a function of a feedback from said second pressing element (24) or a drive unit assigned thereto.

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