EP3248692A1 - Adhesive application roller for use in a glueing device equipped with at least one adhesive application roller - Google Patents

Abstract

A glue application roller (100, 200) for use in a gluing unit (300) equipped with at least one scoop roller (303), wherein the glue application roller has a glue roller body (101) provided with a central bore (102) for receiving a drive shaft (103, 103a) is formed. The glue roller body consists of at least two parts, namely on the one hand from a base body (104), which is in frictional operative connection (113) with the drive shaft (103, 103a), and on the other hand from an outer ring (105) having at least one cavity (106), in that the base body (104) and outer ring (105) are non-positively connected to one another by at least one means (107; 108, 109), that means (116, 118; 116) are provided on at least one side of the glue roller body (101) , 203, 204, 205), which ensure the supply or discharge of compressed air (123) and / or another gaseous or liquid medium into or out of the cavity (106), and that the compressed air and / or a other medium effect a change in the peripheral contour of the cavity (106).

Description

Technical area

The invention relates to a glue application roller for use in a gluing unit equipped with at least one scoop roller, wherein the glue applicator roller is formed from a glue roller body provided with a central bore for receiving a drive shaft. In addition, the invention relates to a method for operating a gluing unit using the glue application roller.

State of the art

In book production, the book blocks not yet provided with a book cover are conveyed by means of a transport device, while an application roller cooperating with a scoop roller is in each case rolled on the back of the book block and thereby applying adhesive thereto.

The contour of the back of the book block can be both straight and round as well as quasi-round, which is why a suitably trained application roller is used. Known application rollers are formed, for example, flat or profiled.

Such and similar methods and devices can be used EP0873882 A1 . DE3502733 C1 or DE4332069 A1 be removed.

The known procedures resp. Devices provide for hand replacement of the applicator roll.

If there is a new production order, the book production line must be stopped for safety reasons, since an expansion resp. Installation of the applicator roll can only be carried out with the shuttering open. Accordingly, after the application of the adhesive on the back of the last book block belonging to the preceding production order, a machine stop first takes place. After opening the shuttering, the previous application roller is removed and mounted on the new production order application roller. Before the removal of the previous application roller, the glue application on the glue-making roller is ideally adjusted to almost 0, and thus the size of the glue film on the application roller is set to minimal thickness, so that the application roller can be removed relatively drip-free. To remove the application roller at least the lateral scraper, which is mounted in the direction of removal, must be swung away. Then the applicator roll is led away by means of an adjusting device manually from the scoop roller and removed by hand. Subsequently, the new application roller is pushed back onto the drive axle and locked and introduced by means of the adjusting device to the scoop roller. Thereafter, the one scraper must be swung back and both scrapers are adapted to the thickness and diameter of the new glue applicator roll and the glue film thickness on the glue scoop roller can be manually adjusted again. After closing the casing, production can be resumed and the new production order processed.

The known methods and devices are thus relatively time consuming and also require manual intervention of the operating personnel. In particular, in the production of smaller runs thus results in a relatively high proportion of changeover time.

Furthermore, it is off EP2634007 B1 a device has become known, which consists of at least two axially spaced-apart applicator rollers and a changing device for the applicator rollers. In each case an applicator roller is aligned with the scoop roller. The changing device is designed for exchanging a first applicator roller aligned in alignment with the scoop roller against a second applicator roller.

Due to this design of the device and the corresponding process sequence, the changing of the applicator rollers arranged in the device can be carried out without manual intervention and independently of the number of copies of a production order.

However, such a solution leads to difficulties when glue residues solidify on the non-engaged glue applicator roll, which glue residues then lead to problems during later use, should they not previously be specifically removed or dissolved. With self-dissolving glue residues, as far as such glues are used, these disturbances are then no longer so virulent.

Out EP2634008 B1 goes out to implement in a Glue when switching from one applicator roll to another a certain automatic. To remove a mounted applicator roll this is pivoted away with its rotary shaft via a pneumatic drive from the glue scoop roller, such that this applicator roller can be extended without touching the glue scoop roller.

The new application roller can then be pushed by hand or automatically on the rotary shaft, and then this order roller can then bring over the already mentioned pneumatic drive against the glue scoop roller back into position. Due to the different round or straight contours of the applicator rollers, the distance between the rotary shaft, and thus the applicator roller, and the glue scoop roller must be readjusted.

For publication DE102004037892 B3 It is about a device for applying a medium to an applicator roll. How out FIG. 1 As can be seen from this document, a plurality of pressure compensation bores 10 are formed in the recess 6b through which the air in the cavity 4 can escape when the cavity 4 is deformed, ie compressed by a deformation of the radial outer surface 3. As a result, an increase in pressure in the cavity 4 is avoided. In the below the rotation axis A in FIG. 1 illustrated further embodiment, the cavity extends not only in the base body 6, but also in the jacket 5. In this case, the recess 6b in the outer surface 6a of the base body 6 as in the embodiment described above (above the axis of rotation A) is formed. Deviating in the embodiment below the axis of rotation A, a second recess 5b in the inner surface 5a of the shell 5 is provided in the circumferential direction of the pressure roller 2. To form the cavity 4, the second recess 5b of the shell 5 at the same height in the longitudinal direction of the pressure roller. 2 arranged, wherein the recess 6b at the transition to the jacket 5 is slightly narrower than the recess 5b of the shell 5. Thus, as in the embodiment described above, the two radial walls 4a, 4b of the cavity 4 are formed by the inner surface 6a of the base body 6, in particular by the bottom of the recess 6b and by the inner surface 5a of the shell 5. In addition, the axial side surfaces 4 c, 4 d are partially formed by the outer surface 6 a of the main body 6 and by the inner surface 5 b of the jacket 5. In the jacket 5, in particular in a front portion of the shell 5, a pressure equalization bore 10 is provided, which connects the cavity 4 with the environment. A further pressure compensation bore 10 may be provided in the bottom of the recess 6b of the main body. This pressure compensation bore 10 is opened in an inner space 6 d of the main body 6, which is formed as a hollow cylinder with a housing 6 e. In FIG. 1 is further shown that the inner surface 5a of the shell 5 in the region of the radially outer walls 4c, 4d of the cavity 4 is profiled. As a result, a better adaptation of the radial outer surface 3 is achieved to the contour of the printed material.

In the publication DE2855210 A1 It concerns a device for printing on bodies with curved surfaces by means of a color on the body over supporting elastically deformable pressure pad. The pressure pad (4 or 4 ') comprises a on the outline of the body to be printed (1) adapted in their dimensions membrane (8 or 8'), wherein the membrane consists of a rubber-elastic material, and wherein the membrane in a the outline of the body to be printed (1) a larger outline having elastic, supporting ring (9 or 9 ') is held.

In the publication US5194116A is about an arrangement for applying a hotmelt adhesive on the spine of a book block. In a bath, the hot melt adhesive is heated by about 350 ° F. A disk is immersed in the bath and this then transfers the absorbed hot melt adhesive to the surface of the book spine of the book block. It is also important here to the material procurement disc, which must meet the increased temperatures of the hot melt.

Presentation of the invention

Here the invention wants to create a total remedy. The object of the invention is to provide a device and a method by which adhesive is transferred from a glue applicator roll on the block spine of a book block, without making a manual intervention, and this regardless of the back shape of the book block to be processed, ie preferably with straight or round back.

In particular, this should be possible in the production of small in the back shape of changing conditions and especially in the number one piece.

According to the invention, this object is achieved by a device having the characterizing features of claim 1 and by a method having the characterizing features of claim 14, wherein claim 14 is a gluing unit which is operated using the glue applicator roll according to claim 1. Advantageous embodiments are given in the dependent claims, respectively.

According to the invention, the device has a glue application roller and an air supply, via which compressed air is supplied into a glue application roller formed with a cavity. Of course, instead of compressed air in principle, another gaseous or liquid medium can be used.

The following is the simple sake of compressed air the speech, but without wanting to do without the other mentioned and operatively possible media.

By means of increasing the pressure of the supplied compressed air, the glue roller round back can be transferred into the contour of the glue roller Straight Back. Via a proportional valve, the pressure is set according to the desired back shape and thus makes a Leimradwechsel superfluous.

The material-moderate design of the pressure-effective cavity part of the glue applicator roll can be designed so that the increase in internal pressure from the round (concave in the overall view) form is not completed to the straight contour, but can be continued until a bulging (convex) contour formed which is used for special book block backs.

Any glue scrapers on the outer contour of the glue application roller are thus not affected by the contour change and can remain at their place of use.

In general, the internal pressure (p _R) in the glue application roller is _round is less than the internal pressure (p _F) of the glue application roller _flat.

When forming the convex peripheral contour, the internal pressure (p _F ) of the glue application roller is smaller than the maximum desired internal pressure (p _k ) of the glue application _{roller convex} .

In the following, the transfer of the Round Back contour into the Straight Back contour is mainly focused: By converting the Round Back contour into the Straight Back contour, the effective diameters of the glue application roller and thus their circumferential speed change. This change is adjusted or controlled by the drive of the gluing unit according to the diameter difference.

For this purpose, according to the invention, the rotational speed of the drive is set individually via a frequency converter. Via a gear so that on the drive shaft on which the glue applicator roller is mounted, generates a predetermined speed. Using a specially created table, each book block is assigned an air pressure in the glue application roller in accordance with its block thickness and back shape. According to the air pressure in the application roller, the effective diameter on the glue application roller and thus also the concave shape of the glue application roller could be determined by means of specially performed test series. The effective diameter describes the vertex of the roll contour, which z. B. is in a rounded and pressed book block with the apex of the rounding of the book block in contact.

The book block is guided according to the production speed of the book production line with a defined transport speed in the transport direction of the book block under the glue application roller. The glue application roller is wetted by the glue scoop roller with a defined glue film thickness, and the glue application roller transfers this picked glue to the book block spine. During this transfer of the glue, approximately the same speeds should prevail at the points of contact between the glue applicator roller and the book block spine. Since the speed of the book block is not dependent on the book block format, but depends on the production speed of the book production line, here the speed of the glue roller must be adjusted accordingly by the speed of the drive shaft is changed.

For this purpose, the effective glue-transferring peripheral surface of the glue scoop roller must have a high degree of flexibility with respect to the respective contour of the glue application roller to be wetted if all the embodiments according to the invention are to be detected.

In order to avoid glue contamination on the head or on the foot of the book block, the speed of the glue application roller can be increased or reduced according to the invention during gluing in these areas and the entire gluing unit can be lifted off the book block via a pneumatic lifting unit.

Of course, air pressure changes in the glue application roller can also be used to improve the glue soiling on the head or foot of the book block. Thus, the air pressure when gluing the book block in the area of the head and / or foot can be different than in the middle area of the book block. For single editions, it is also possible to drive for the transfer of the glue film from the glue scoop roller on the glue application roller with an optimal for this process, compared to the Buchblockbeleimung changed air pressure and then when the book block passes for gluing on the for gluing for switch this book block optimal air pressure.

The resulting from the change in the effective diameter height difference between glue roller and book block spine, according to the difference from radius _round to radius _flat or vice versa, adjusted via an additional height adjustment, so that the transition from flat to round back runs automatically.

For this purpose, an automatic height adjustment is attached to the gluing unit. In this solution according to the invention, the gluing unit is displaced by means of two rollers, which are attached to the outer points of the axis of rotation of the gluing unit, in the direction of transport of the book block as a function of the book block format. The height adjustment described here is only an example. There are also other solutions possible in which a height change is adjusted from flat to round about a cylinder with a fixed stroke. The rotary spindle has a hand wheel for fine adjustment and a switchable wedge rotates the rocker.

About a rocker, to which a roller is attached, the Gluework is on a rigid support. This edition is connected to the rear gluing station, so that when a height adjustment of the back gluing station, the gluing unit is automatically mitverstellt in height by the entire gluing plant is rotated about its axis of rotation. The glue roller makes the same height adjustment as the back glue station.

With the inventive automatic height adjustment can be acted on different diameters of the glue application roller. About a drive a rotary spindle is driven, which is connected via a rotary joint with the rocker in combination, and the rocker is rotated about its axis of rotation. Since the mounted on the rocker roller rests on the support, thereby the axis of rotation of the rocker is adjusted in height and thus the entire gluing plant is pivoted about the rotation axis gluing.

The compressed air supply in the glue roller can be done either centrally via a bore in the drive shaft or via a bell attached to the glue applicator roll. In both cases, compressed air is fed into the rotating glue application roller via an air rotary distributor and regulated in accordance with the desired contour via a proportional valve.

This also has the advantage that hereby the air pressure can be set very accurately. Thus, in these gluing plants it is possible to drive with different hot-melt sizes, so that the temperature of the glues during processing can be up to 100 degrees different. With the proportional valve heating of the glue applicator roll and thus an unwanted pressure increase in the glue application roller can be counteracted and thus a desired pressure can be maintained regulated.

Instead of compressed air, of course, as already stated above, another gaseous medium can be used, which then behaves physically similar to the occurring pressure increases as air.

For this purpose, the glue application roller is designed for use in a gluing unit equipped with at least one scoop roller. This glue applicator roll is formed from a glue roller body with a central bore for receiving a drive shaft.

The glue roller body consists of at least two parts, wherein this is on the one hand from a standing directly with the drive shaft in frictional operative connection body, and on the other hand consists of an outer ring which is formed with at least one cavity. The main body and outer ring are non-positively coupled by at least one means, wherein at least one side of Leimwalzenkörpers the drive shaft is centrally or quasi-centrically provided with means via which a compressed air for generating a contour change of the outer circumference of the cavity of the outer roller of Leimwalzenkörpers einleit- or derivable has.

1. i) Die Drehzahl eines Antriebsmotors wird über einen Frequenzumformer individuell eingestellt;
2. ii) Über einen Getriebe wird an der Antriebswelle, auf welche die Leimauftragswalze montiert ist, eine bestimmte Drehzahl erzeugt;
3. iii) Entsprechend dem eingestellten Luftdruck in der Leimauftragswalze wird der wirksame Durchmesser an der Leimauftragswalze und damit auch die durch eine Druckluftführung erzeugte gewünschte umfangsseitigen Kontur der Leimauftragswalze eingestellt, wobei der ideale Luftdruck vorab entsprechend der Buchblockdicke und eventuell der Rundeform (sehr rund oder weniger rund) ermittelt wurde und in einer Tabelle abgespeichert und operativ nach Tabelle eingestellt wird. Würde nämlich der Luftdruck immer erst beim Aufsetzen der Auftragswalze auf den Buchblock über Sichtkontakt eingestellt und damit ermittelt werden, wäre die Beleimung nicht vollautomatisch. Dies lässt indessen die Möglichkeit offen, dass natürlich während der Produktion den Luftdruck immer noch verändert werden kann;
4. iv) Der Buchblock wird gemäss der Produktionsgeschwindigkeit der Buchfertigungsstrasse mit einer definierten Transportgeschwindigkeit in Transportrichtung des Buchblocks unter der Leimauftragswalze vorbei geführt;
5. v) Die Leimauftragswalze wird durch eine Leimschöpfwalze mit einer definierten Leimfilmdicke benetzt und die Leimauftragswalze überträgt diesen aufgenommenen Leim auf den Buchblockrücken weiter;
6. vi) Die Geschwindigkeit des Buchblocks ist vom Buchblockformat losgelöst und richtet sich nach der Produktionsgeschwindigkeit der Buchfertigungsstrasse, womit die Geschwindigkeit der Leimauftragswalze entsprechend angepasst wird, indem die Drehzahl der Antriebswelle verändert wird;
7. vii) Aus der Änderung des Wirkdurchmessers ergebende Höhenunterschied zwischen Leimauftragswalze und Buchblockrücken, wird gemäss der Differenz mindestens von Radius _Rund zu Radius _Flach oder umgekehrt, über eine zusätzliche Höhenverstellung angepasst, sodass die Umstellung von Flacher- auf Runder Rücken automatisch abläuft;
8. viii) Eine automatische Höhenverstellung am Leimwerk wird mittels zwei Laufrollen, welche an den äusseren Punkten der Drehachse des Leimwerkes angebracht sind, und welche in Transportrichtung des Buchblocks in Abhängigkeit des Buchblockformates verschoben werden;
9. ix) Über eine Wippe, an welcher eine Laufrolle befestigt ist, liegt das Leimwerk auf einer starren Auflage auf, dergestalt, dass diese Auflage mit einer Hinterklebestation verbunden ist, so dass bei einer Höhenverstellung der Hinterklebestation das Leimwerk automatisch in der Höhe mitverstellt wird, indem das gesamte Leimwerk über seine Drehachse verdreht wird, wobei die Leimauftragswalze die gleiche Höhenverstellung wie die Hinterklebestation ausführt.

Furthermore, the operation of the gluing unit is carried out using the glue application roller and has at least the following main process steps:

1. i) The speed of a drive motor is set individually via a frequency converter;
2. ii) A gear is used to generate a specific speed on the drive shaft on which the glue applicator roller is mounted;
3. iii) In accordance with the set air pressure in the glue application roller, the effective diameter at the glue application roller and thus also the desired circumferential contour of the glue application roller generated by a compressed air guide is set, whereby the ideal air pressure in advance corresponding to the book block thickness and possibly the round shape (very round or less round) was determined and stored in a table and set operationally according to table. If, in fact, the air pressure would always be set on the book block by visual contact during placement of the applicator roller and thus determined, the gluing would not be fully automatic. However, this leaves open the possibility that, of course, air pressure can still be changed during production;
4. iv) The book block is guided according to the production speed of the book production line with a defined transport speed in the transport direction of the book block under the glue application roller;
5. v) the glue application roller is wetted by a glue scoop roller having a defined size of glue film, and the glue application roller transfers this absorbed glue to the book block spine;
6. vi) The speed of the book block is detached from the book block format and depends on the production speed of the book production line, whereby the speed of the glue applicator roll is adjusted accordingly by changing the speed of the drive shaft;
7. vii) resulting from the change of the effective diameter difference in height between the glue application roller and the book block back is, according to the difference of at least radius _round to _flat radius or vice versa, via a adjusted additional height adjustment, so that the conversion from flat to round back runs automatically;
8. viii) An automatic height adjustment on Glimwerk is by means of two rollers which are attached to the outer points of the axis of rotation of the gluing unit, and which are moved in the transport direction of the book block depending on the book block format;
9. ix) Via a rocker to which a roller is attached, the gluing unit rests on a rigid support in such a way that this support is connected to a back gluing station so that when the back gluing station is vertically adjusted, the gluing unit is automatically adjusted in height by: the entire gluing unit is rotated about its axis of rotation, wherein the glue application roller performs the same height adjustment as the Hinterklebestation.

Furthermore, reference is made to the embodiment variants and method steps of the dependent claims, the substance of which is self-explanatory in all respects, so that a more extensive commentary is unnecessary, which also applies to the independent claims.

Short description of the drawing

The invention will be described in more detail below with reference to the drawing. All elements not essential to the instant understanding of the invention have been omitted. Identical elements are provided with the same reference numerals in the various figures.

Figur 1

eine zusammengebaute Leimauftragswalze mit einer ersten Druck-luftzuführung;

Figur 2

eine weitere zusammengebaute Leimauftragswalze mit einer zweiten Druckluftzuführung und

Figur 3

ein fertig ausgebautes Leimwerk, unter Anwendung einer Leimauftragswalze nach den Figuren 1 oder 2.

In the drawing shows:

FIG. 1

an assembled glue applicator roll with a first compressed air supply;

FIG. 2

another assembled glue applicator roll with a second compressed air supply and

FIG. 3

a finished gluing unit, using a glue roller according to the FIGS. 1 or 2 ,

Embodiments of the invention

The FIGS. 1 and 2 show two variants of a fully assembled glue applicator roll 100, 200, which are operated on the same principle, ie by the change of the outer effective peripheral contour by a compressed air supply in the peripherally disposed cavity of the glue applicator roll from equip, said cavity in the circumferential direction a single chamber forms.

However, this cavity may also be supplemented by a number of radially extending diaphragms which subdivide the cavity into sectors, these sectors being individually pressurized with compressed air and made airtight to one another, or these sectors forming a communicating system throughout the cavity through openings acting on each other ,

The FIGS. 1 and 2 are designed so that they each show a half-way representation based on the two possible embodiments of the perimeter, so once for the use of round book block back (top) and once for the use of flat book block back (bottom). The pressure prevailing in the cavity is referred to as P _round , ie P _R , and as P _flat , ie P _F , and it is in this constellation, starting from a starting position P _round , that P _R <P _F , The characters in terms of radius or diameter are only qualitative nature.

According to FIG. 1 the glue applicator roller 100 consists of a glue roller body 101, with a central bore 102 for a drive shaft 103. The glue roller body is composed of two parts: this consists on the one hand of a base body 104 made of steel, which acts in operative connection with the drive shaft, and on the other an outer ring 105 made of an elastic material, which has the above-mentioned cavity 106. The main body and outer ring are preferably connected non-positively via a fit 107. In order to maximize the strength of this connection 107, flanges 108, 109 are provided on both sides of the glue roller body, which are formed concentrically to the drive shaft, and which incorporate the base body and outer ring into an immovable unit. For this purpose, the outer protruding edge 110 of each flange is connected by screw 111 with a circular groove 112 in the outer ring, which is certain that the Leimwalzenkörper forms a solid unit. About a locking pin 113, the drive shaft is frictionally coupled to the main body of Leimwalzenkörpers, and so formed a coherent rotating unit, as symbolized by the position V. At least on one side of the glue roller body, the drive shaft is centrally supplemented with an adapter 114 and a protective cover 115, wherein the adapter has internally a rotary distributor 116, via which compressed air 123 is guided into the interior of the drive shaft. Thus, the primary task of the protective cover 115 is to see that the rotary distributor 116 is not damaged. Alternatively, the adapter 114 can be omitted and the rotary distributor 116 can be integrated directly into the drive shaft 103. The rotary distributor 116 is coupled at the end to a hose 117, via which compressed air is guided. In the adapter takes place a diversion for the compressed air, which branch is formed by at least one radially guided bore 118, which opens into the cavity 106 of the Leimwalzenkörpers to change the volume formed by the cavity by generating a pressure difference, as the compressed air supplying unit 122 with the wants to symbolize subsequent proportional valve 124.

With this pressure difference, an outer circular contour 119 of the Leimwalzenkörpers is transferred into a flat contour 120, which mutually both book block back shapes (round / flat) can be edited, which can be accomplished without a replacement of the can roller body. The same way in reverse order also applies if in the capstan body pressure must be released so that the circumferential flat contour 120 of the Leimwalzenkörpers can be reversed back into the (original) circumferential round contour. The sealing of the transition of the radially extending compressed air bearing bore 118 between the outer periphery of the drive shaft and the inner circumference of the base body of the Leimwalzenkörpers is ensured by sealing rings 121 arranged on both sides.

FIG. 2 essentially corresponds to the FIG. 1 , where the differences are opposite FIG. 1 are detected by positions marked with 200 numbers. This glue roller 200 has between FIG. 1 similar flange 108 and the protective sheath 115 an interposed screwed 202 bell 201, which is in operative connection with the rotary distributor 116, wherein within this bell 201 at least one radially extending and compressed air-carrying bore 203 is provided, the guide then at the height of the flange 108 in at least an axially or quasi-axially extending bore 204 passes, which extends into the base body 104. At the level of the cavity 106 branches off from the axially or quasi-axially extending bore 204 from at least one further again radially or quasi-radially extending bore 205, via which compressed air 123 is guided into the cavity 106.

This axially or quasi-axially extending bore 204 is guided via a bolt 206, which serves as a connection between the bell 201 and the base body 104 and seals the bolt 206, which is screwed into the base body 104, with the bell 201 via a seal 207.

Accordingly, in this FIG. 2 as well as in the FIG. 1 a compressed air supply is selected, in which a control with regard to the air supply, the DruckAufbaues and -Zbbaues is set, ie the compressed air 123 is supplied to the rotating glue applicator roll and regulated according to the desired contour via preferably a proportional valve 124.

This is an embodiment in which the air supply takes place in the cavity 106, without affecting the drive shaft 103a

In summary, the compressed air supply into the glue roller either centrally via a bore in the drive shaft (see FIG. 1 ) or according to FIG. 2 over an attached bell takes place. In both cases, compressed air is fed into the rotating glue application roller via an air rotary distributor and regulated in accordance with the desired contour via a proportional valve.

Accordingly, from the description of the FIGS. 1 and 2 recognize that the structure of the embodiment according to FIG. 2 according to those according to FIG. 1 has the advantage that in this case, if necessary, a rapid change of the glue applicator roll can be made, since the energy supply, here the supply of compressed air or other gaseous or liquid medium, part of the Leimwalzenkörpers 101. Thus, the embodiment according to FIG. 2 easily transferred to existing hollow rollers, such that at best only the receiving bore must be modified accordingly. Thus, in this embodiment according to FIG. 2 a slight retrofitting of existing glue rollers is given. In any case, in the embodiment according to FIG. 2 the drive shaft is not exchanged or reworked, which in the embodiment according to FIG. 1 the case is.

By transferring the contour of the round back into the contour of the straight back, the effective diameters of the glue application roller and thus also their circumferential speed change. This change is adjusted or controlled by the drive of the gluing unit 300 in accordance with the diameter difference.

This is done according to Fig. 3 set the speed of the drive motor 301 individually via a frequency converter. Via a gear 316 is thus on the drive shaft 306, to which the glue applicator roll 100 (or 200, see FIG. 2 ), generates a predetermined speed 317. Using a specially created table, each book block is assigned an air pressure in the glue application roller in accordance with its book block thickness and according to its back shape. According to the air pressure in the glue application roller used, the effective diameter on the glue application roller and thus also the concave shape of the glue application roller were determined. The effective diameter describes the vertex of the roll contour, which z. B. is in a rounded and pressed book block with the apex of the rounding of the book block in contact. The book block is guided according to the production speed of the book production line with a defined transport speed in the transport direction of the book block under the glue application roller. The glue applicator roll is wetted by the sizing roller 303 with a defined size of glue film, and the glue applicator roll transfers this picked glue to the book block back 304. During this transfer of the glue, approximately equal speeds should prevail at the points of contact of the glue applicator roller with the book block spine.

Since the speed of the book block 305 does not depend on the book block format, but depends on the production speed of the book production line, must be adjusted here according to the speed of the glue roller by the rotational speed of the drive shaft 306 is changed. In order to avoid glue contamination on the head or on the foot of the book block, the speed of the glue application roller can be increased or reduced during gluing in these areas and the entire gluing unit can be lifted off the book block via a pneumatic lifting unit. Of course, air pressure changes in the glue application roller can also be used to improve the glue soiling on the head or foot of the book block. Thus, the air pressure when gluing the book block in the area of the head and / or foot can be different than in the middle area of the book Book block. For individual runs, it is also possible to drive for the transfer of the glue film from the glue scoop roller 303 on the glue application roller with an optimal for this process, compared to the Buchblockbeleimung changed air pressure and then when the book block for gluing passes over (see Pos. 307) to switch to the optimum for the gluing for this book block air pressure.

The difference in height between the glue application roller and the book block spine, which results from the change in the effective diameter, is adjusted according to the difference between radius _round to radius _flat or vice versa via an additional height adjustment so that the changeover from flat to round back runs automatically.

This is according to FIG. 3 an automatic height adjustment 308 attached to the gluing unit 300. In this solution, the gluing unit is moved by means of two rollers 315, which are attached to the outer points of the axis of rotation of the gluing unit, in the transport direction of the book block depending on the book block format. Shown here is only one roller 315. About a rocker 310, to which a roller 309 is attached, the gluing unit is on a rigid support 311 on. This edition is connected to the rear gluing station, so that when a height adjustment of the Hinterklebestation the gluing unit is automatically mitverstellt in height by the entire gluing unit is rotated about its axis of rotation 302. The glue applicator roller performs the same height adjustment as the rear gluing station.

With the automatic height adjustment 308 can be acted on different diameters of the glue application roller. Here, a rotary spindle 312 is driven via a drive motor, not shown, which is connected via a rotary joint 313 with the rocker 310 in conjunction and the rocker is rotated about its axis of rotation 314. Since the mounted on the rocker roller 309 rests on the support 311, thereby the axis of rotation of the rocker is adjusted in height and thus the entire gluing unit is pivoted about its axis of rotation. The on the Leimwalzenkörper 101 shown arrow 317 symbolizes the speed of the entire predetermined by the drive shaft 306 speed.

This also has the advantage that hereby the air pressure can be set very accurately. For example, these gluing plants use different hot-melt glues so that the temperature of the glues during processing can be up to 100 degrees different. With the proportional valve heating of the glue applicator roll and thus an unwanted pressure increase in the glue application roller can be counteracted and thus a desired pressure can be maintained regulated.

Claims (16)

A glue application roller (100, 200) for use in a gluing unit (300) equipped with at least one scoop roller (303), wherein the glue application roller has a glue roller body (101) provided with a central bore (102) for receiving a drive shaft (103, 103a) is formed, characterized in that the glue roller body (101) consists of at least two parts, namely on the one hand from a base body (104) with the drive shaft (103, 103a) in frictional operative connection (113), and on the other from an outer ring (105), which is formed with at least one cavity (106), that the base body (104) and outer ring (105) by at least one means (107; 108, 109) are non-positively connected, at least on one side the Leimwalzenkörpers (101) means (116, 118; 116, 203, 204, 205) are arranged, which the supply or discharge of compressed air (123) and / or other gaseous or liquid medium in d or from the cavity (106) and ensure that this supply or discharge of compressed air and / or other medium, a change in the peripheral contour (119, 120) of the cavity (106) accomplish, such that starting from a concave Peripheral contour of the outer ring (105), which is designed for the processing of a round or quasi-round book block back, the compressed air and / or other medium in the cavity (106) are introduced until the peripheral contour to a flat or quasi-flat shape for the processing of a corresponding book block back is changeable, that starting from a flat peripheral contour of the outer ring (105) for the processing of a flat book block back continue compressed air and / or other medium in the cavity (106) are introduced until this peripheral contour is a convex shape for the Processing a corresponding book block back has. Glue applicator roll (200) according to claim 1, characterized in that the glue roller body (101) has a directly or indirectly connected rotary distributor (116), from which the compressed air (123) and / or another medium, bypassing the drive shaft (103a) through the Leimwalzenkörper (101) via a continuous flow path (203, 204, 205) are feasible, and that the compressed air and / or another medium then in operative connection with the cavity (106). Glue applicator roll (100) according to claim 1, characterized in that the drive shaft (103) upstream of the Leimwalzenkörpers (101) carries at least one centric or quasi-centric rotary distributor (116), from which the supplied compressed air (123) and / or another Medium through the drive shaft (103) are guided, and that the compressed air and / or another medium then with the cavity (106) are in operative connection. Glue applicator roll according to one of claims 2, 3, characterized in that the rotary distributor (116) is in operative connection with at least one valve (124), which arranged the supply or discharge of the compressed air (123) and / or another medium with respect to the downstream Cavity (106) controls. Glue applicator roller according to claim 4, characterized in that the valve (124) is a proportional valve. Glue applicator roll according to one or more of claims 1-4, characterized in that the rotary distributor (116) is provided with a protective cover (115). Glue applicator roll according to claim 1, characterized in that the base body (104) made of a steel material and the outer ring (105) consist of a volume-flexible material. Glue applicator roll according to claim 1, characterized in that the connection between the base body (104) and outer ring (105) via a frictionally configured fit (107) and / or on both sides of Leimwalzenkörpers (101) flank side mounted flanges (108, 109) is formed. Glue applicator roll according to claim 1, characterized in that the drive shaft (103, 103a) at least with the base body (104) via at least one locking pin (113) is firmly anchored. Glue applicator roll according to claim 1, characterized in that the return of the supplied compressed air and / or another medium from the cavity (106) from a higher to a lower pressure by an emptying process can be accomplished. Glue applicator roll according to claim 1, characterized in that the cavity (106) in the circumferential direction forms a single pressure-effective chamber. A glue applicator roll according to claim 1, characterized in that the cavity (106) is subdivided by at least one radially extending diaphragm which spans the width of the cavity (106) and which circumferentially forms at least two sectors within the cavity (106) which sectors are hermetically sealed against each other, and which in each case can be acted upon by an individual supply of compressed air and / or another medium. Glue applicator roll according to claim 1, characterized in that the cavity (106) in the circumferential direction has a plurality of sectors, which form a communicating system with each other concerning the compressed air and / or another medium. Method for operating a gluing unit using the glue application roller according to one of claims 1-13, characterized by the following steps: a) The speed of a drive motor (301) is set individually via a frequency converter; b) via a gear (316) on the drive shaft (306) on which the glue applicator roll (100, 200) is mounted, a certain speed (317) is generated; c) According to a previously prepared table, the ideal effective diameter on the glue application roller and thus also the desired peripheral contour of the glue application roller produced by a compressed air guide are set via the air pressure in the glue application roller. d) The book block is guided according to the production speed of the book production line at a defined speed in the transport direction of the book block under the glue application roller. e) the glue applicator roll is wetted by a sizing roller (303) with a defined size of sizing film, and the sizing roll transfers this picked glue to the book block spine (304); f) The speed of the book block (305) is independent of the book block format and depends on the production speed of the book production line, so that the speed of the glue applicator roll is adjusted accordingly by changing the speed of the drive shaft (306); g) The resulting from the change in the effective diameter height difference between glue applicator roller and book block back (304) is adjusted according to the difference at least from radius _round to radius _flat or vice versa via an additional height adjustment, so that the switch from flat to round back runs automatically; h) An automatic height adjustment (308) on the gluing unit (300) is produced by two rollers (315), which are attached to the outer points of the axis of rotation of the gluing unit, and which are displaced in the transport direction of the book block depending on the book block format; i) About a rocker (310) to which a roller (309) is attached, the gluing unit on a rigid support (311), such that this support is connected to a Hinterklebestation, so that when a height adjustment of the Hinterklebestation the Leimwerk is automatically mitverstellt in height by the entire gluing plant is rotated about its axis of rotation (302), wherein the glue roller performs the same height adjustment as the Hinterklebestation; A method according to claim 14, characterized in that the speed of the glue applicator roll is increased or reduced to avoid glue contamination on the head or foot of the book block during gluing in these areas, and the entire gluing unit is lifted from the book block via a pneumatic lifting unit. Method according to one of claims 14, 15, characterized in that to avoid glue contamination on the head or the foot of the book block during gluing the air pressure in the glue application roller is adjusted accordingly.

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