EP2289706A1 - Pressing device - Google Patents

Abstract

The rubbing device (1) has two oppositely acting book block side pressing devices (8), where a vertically fixed book block back pressing device (16) is provided. A longitudinal-promoting medium is provided with a conveyor section, where another conveyor section is provided with the back pressing device in a conveying direction.

Description

The invention relates to a rubbing device for rubbing a cover on a book block spine of a book block, with two oppositely acting on the book block side pressing devices and on the back of the side presses vertically fixed book block attacking back press device, in particular with several press rollers through which the book block by means of a longitudinal conveyor on the book block rests with the book block back, transportable.

Important for the visual impression and the quality of a substantially cuboid print product to be produced, in particular a book or a catalog, are the most accurate possible parallelepiped shape and, as far as possible, bubble-free seating of the cover of the book block back. The book block is usually referred to the already bonded and / or thread stitched arrangement of the printed and folded individual sheets of a book. In order to obtain the finished product, a cover is applied to the book block back both in softcover printing units as well as hardcover printing units. In the case of a softcovers, this itself already serves to cover the book block back, in the case of hard covers, for example, a gauze strip is used. This cover must be rubbed to obtain a high quality product, which means being pressed so that an intimate connection without air bubbles is formed, also an equal distribution of the glue must be ensured, for example, if due to gravity results in a rather round shape of the book block back.

For this purpose, friction means such as the initially mentioned are basically known, in which the book block is placed on the spine and already provided with the cover, to be then fixed by two side presses, while a back press device from below the cover rubs against the book block back.

Problems in the quality of the final product may arise if, for example, in a production line, the books are not all exactly in the correct position in the grinder and / or have manufacturing tolerances. Then it may happen, for example, that there is a region of too low Anreibdruck so that the Anreibevorgang is not carried out correctly or may cause blemishes.

The invention is therefore the object of a friction device of the type mentioned in such a way that a better adaptation to the incoming book block can be done.

To solve this problem is provided according to the invention in a friction device of the type mentioned that the longitudinal conveyor comprises a first conveyor section and a second conveyor section downstream thereof in the conveying direction with the back pressing device, wherein the first conveyor section adjustable in position relative to the second conveyor section by means of an actuating means is.

The adjustable first conveyor section in the context of the present invention thus represents a correction means by means of which, for example, directly from the glue binder entering book block before passing through the back press means can be pre-positioned so that an ideal grinding results. In this way, misalignments, but also manufacturing tolerances can be compensated so that always produces a quality product. The present invention thus provides the possibility of introducing the product to be indicated into the grinding device so that an optimum grinding result can be achieved.

In a particularly advantageous embodiment of the present invention, the side pressing means may comprise a press belt engaging the lower edge of the book block. In this case, the gripping device additionally serves, for example, to eliminate lateral buckling or backward slopes arising in the course of thread binding (often also in the form of a "mushroom"). designated) by evenly pressing, acting at the bottom of the book block press belts are provided with which a uniform appearance and a flat side profile of the book block can be restored. At the same time, the side press devices fulfill the purpose of fixing the book block against the back press device. Thus, two tasks are thus carried out with the grating device according to the invention, namely grinded on the cover on the book block back, on the other hand, the back slope is reduced by the abpressive side press and ideally canceled altogether.

The inventive division into a first and a second conveyor section, wherein the first conveyor section is adjustable in its position relative to the second conveyor section, therefore, the position of the book block with respect to the pressing by the side pressing means can be selected so that in this respect a optimal result is obtained.

If the side press devices thus also act as a pressing device, the press belt designed as a toothed belt is preferably guided over toothed wheels. On the outside, the press belts of the two side press devices can also be coated, in particular with PUR, in order to ensure optimum press-out result, good grip and integrity of the book block. Of course, in order for the grinder device according to the invention to be able to machine book blocks of different thicknesses, the side press devices, ie in practice the press belts, are adjustable in their distance from one another. It can also be provided press rollers over which the press belt runs, which are resiliently mounted.

It should also be noted at this point that the rubbing device according to the invention is intended for use in a production line. The book blocks can already be glue-bound and / or thread-bonded, and it is basically also conceivable to provide the piecing device according to the invention at two points in the production line in the case of glue-binding and thread-binding.

The gripping device may additionally comprise a guide device which can be adjusted in particular in its width, for example with a sheet metal guide, which ensures a coarse guidance of the book block transported by the gripping device. Such a guide device can also be continued above the side press devices, in particular if they engage only at the lower edge of the book block.

The first conveying section can be pivotable and / or displaceable relative to the second conveying section. In this case, in particular a pivotability about a horizontal axis perpendicular to the conveying direction proves to be advantageous, so that the book block back can be inclined relative to the horizontal. Height adjustability has also proved to be particularly advantageous in order to determine at which height the book blocks enter the second conveyor section.

In a concrete embodiment, it can be provided that the adjusting means comprises an inlet-side and an outlet-side height adjustment device, which height adjustment devices are independently or jointly actuated. Accordingly, both the inlet side and the outlet side can be adjusted in height on the first conveyor section in order to allow different inclinations and initial heights with independent actuation, which is preferred. In this way, a pivotability of the first conveyor section is made possible by a horizontal axis perpendicular to the conveying direction as well as a total height adjustment.

Conveniently, the first conveyor section may comprise a arranged below the conveying plane movable roller carrier provided with at its inlet side and its outlet end recesses, in which recesses engages the disc of an eccentric for height adjustment. The first conveying section accordingly comprises a carrier, in particular for rollers, which forms the ultimately pivotable and / or height-adjustable element. About the roles of the role carrier becomes directly or indirectly transported the book block, for example, as will be discussed later, a conveyor belt may be provided, which is guided over rollers arranged on the roller carrier. Now, if the carrier is moved, in particular pivoted or höhenverstellt, the way in which the book block is promoted changes. As adjusting means eccentric are proposed, which are easy to implement and allow height adjustment in a meaningful area in a simple manner. Preferably, each eccentric comprise a rotary shaft with a user-side height adjustment operating element, in particular with a rotary knob provided on an outer panel. For example, a continuous, on both sides of the support frame of the Anreibevorrichtung supported rotary shaft are provided on both sides, which carries the otherwise lateral stable guided roller carrier on the recesses arranged in the eccentric discs, for example, opposite, lateral recesses a single eccentric with two discs and a Rotary shaft can be assigned, so that the roller carrier can therefore be designed as a supporting frame, for example, rollers. Supporting can also be a further storage of the described carrier, for example a spring bearing or the like, are provided, but any configurations are conceivable. The rotary shafts can, as described, project through to the outer lining and comprise a rotary knob, the height adjustment takes place when actuated by a user. If an independent height adjustment provided by the eccentric, so one of the recesses may be laterally extended to compensate for the independent eccentric movements. Thus, a defined sideways movement is realized at different eccentric settings.

In a particularly advantageous embodiment of the rubbing device according to the invention, it is provided that the back pressing device comprises a pressure adjusting device for setting the rubbing pressure. It should be expressly pointed out at this point that such a pressure adjusting device for setting the Anreibedrucks also independent of the adjustable against the second conveyor section first conveyor section represents an advantageous development of a grinder, thus also can be realized independently of this embodiment. As a result, a second adjustment is given, which aims at an optimal grinding result and optionally pressing result. Thus, the quality of the resulting product can be further improved, especially for individual or a few book blocks.

In a concrete embodiment of such a pressure adjustment device can be provided that the return device comprises a support support, in particular a support frame against which the otherwise guided press rollers elastic, in particular by means of at least one spring element, supported, which support support is at least at one point adjustable in height. It is therefore a support support, in particular a support frame provided, against which the example arranged on roller blocks press rollers are resiliently mounted to generate the pressing pressure. This can be done for example by means of spring elements. A guide device ensures the further guidance of the press rollers and the support carrier. The support beam is now designed to be height-adjustable at least at one point, so that ultimately, if the support carrier is placed higher on one side, there increases the contact pressure of the press rollers. A lower position lowers the contact pressure of the press rollers. Specifically, it can be provided that the support support comprises at its inlet side and its outlet end provided recesses, in which recesses engages the disc of an eccentric for height adjustment. Here, too, the height adjustment can thus be realized via an eccentric, in turn, in turn, both pivoting about a horizontal axis perpendicular to the conveying direction as well as common adjustment of the eccentric height adjustment of the support support and thus a similar pressure adjustment along the conveying direction. By pivoting can be achieved, for example, that the pressure to the outlet end of the back press device is slowly increased or the like. Thus, there are advantageous ways to adapt the concrete rubbing process on the book block to be pressed. In this case, as already described with regard to the roller carrier of the first conveyor section, be further provided that each eccentric comprises a rotary shaft with a control element for user-side height adjustment, in particular with a provided on an outer panel knob. Here, too, it is conceivable that the support carrier is essentially carried by the continuous rotary shafts. With regard to the support carrier, provision may also be made for one of the recesses to be laterally extended to compensate for the independent eccentric movements. As can be seen, the statements relating to the roller carrier of the first conveyor section can be analogously transmitted.

In a further advantageous embodiment of the present invention can be provided that the longitudinal conveyor comprises an attacking on the book block back, both conveyor sections continuous conveyor belt. A conveyor belt per se is an advantageous extension of the invention, which may be, for example, a coated, in particular PUR coated, conveyor belt. Such a conveyor belt protects the product from contamination and damage by rollers, for example, the rollers of the first conveyor section or the press rollers. In particular, however, a continuous conveyor belt can be used, so that only one drive device is necessary. For this purpose, the conveyor belt may be guided between the conveyor sections via a preferably spring-mounted deflection roller. If this deflection roller is spring-loaded, the length compensation can also be carried out during an adjustment of the conveyor sections. However, the length compensation is also conceivable at another location.

If an abovementioned support carrier for the press rollers is provided, it can be provided in a further advantageous embodiment of the present invention that the press rollers of the back press device are supported elastically on both sides on the supporting support designed as a support frame, through which the lower run of the conveyor belt is guided. In this way, it is possible to save space to lead both the conveyor belt below the conveyor sections and at the same time to realize the adjustment options according to the invention. It is particularly advantageous if the side pressing devices and the longitudinal conveying means comprise a common drive device, whereby a uniform operation is ensured; This means that, for example, the conveyor belt and the press belts of the side presses are operated at the same speed. Of course, it is also possible that the side press devices and the longitudinal conveyor are operated by matched drive devices. Thus, no problems arise due to different transport speeds.

It can further be provided that the side pressing devices are already designed to attack the book block in the region of the first conveying section. The book block can thus be positioned on the first conveyor section by its adjustability via the adjusting means and is gripped and fixed in this position so as to be supplied to the second conveyor section and thus the back press device. In any case, the book block is already fixed when it reaches the back press device.

Fig. 1

eine erfindungsgemäße Anreibevorrichtung,

Fig. 2

einen Querschnitt durch die erfindungsgemäße Anreibevorrichtung senkrecht zur Förderrichtung,

Fig. 3

das Längsfördermittel der Anreibevorrichtung,

Fig. 4

eine Schnittansicht im Bereich des ersten Förderabschnitts, und

Fig. 5

eine Schnittansicht im Bereich des zweiten Förderabschnitts.

Further advantages and details of the present invention will become apparent from the embodiments described below and with reference to the drawing. Showing:

Fig. 1

a rubbing device according to the invention,

Fig. 2

a cross section through the grating device according to the invention perpendicular to the conveying direction,

Fig. 3

the longitudinal conveyor of the grinder,

Fig. 4

a sectional view in the region of the first conveyor section, and

Fig. 5

a sectional view in the region of the second conveyor section.

The Fig. 1 and 2 show an embodiment of a grinder according to the invention 1. It shows Fig. 1 a perspective view, Fig. 2 a section perpendicular to the conveying direction. In the Fig. 1 shown, front side largely transparent outer panel 2 shown can be made actually transparent in the areas shown so that transported by the gripping device 1 book block can be seen and optionally settings can be made, which will be discussed in more detail below.

The rubbing device 1 is designed for use in a production line, for example a laminated beam. Book blocks, already provided with a cover of the book block back, are fed along the arrow 3 of the gripper 1 and leave them along the arrow 4 again. The book blocks are standing on the book block back and are taken by the Anreibevorrichtung 1 by a width-adjustable guide device 5 in reception, which is realized on the visible side for better inspection by rods 6, on the opposite side by a sheet guide 7. A respect to the Fig. 3 longitudinally conveying means 14 described in further detail transports the book block standing on the book block back through the rubbing device 4, wherein first two second pressing devices 8 acting on the lower edge of the book block are reached. These comprise as coated press belts 9 each have a toothed belt 10, which is guided over gears 11. Operates the gears 11 and thus the press belts 9 via a respective side press 8 associated drive devices 12, which are tuned with a drive device 13 for the longitudinal conveyor 14 such that a more uniform and damage-free transport of the book block is still possible if the book block through the pressing belts 9 is fixed. The drive device 13 operates thereby a continuous conveyor belt 15, which with respect to the Fig. 3 will be explained in more detail.

The side press devices 8 serve two purposes: On the one hand, a backward inclination originating, for example, from a thread binding is achieved Eliminates squeezing, including optionally not shown here spring-loaded press rollers can be provided over which the press belt 9 runs. On the other hand, the book block is fixed relative to a press-back device 16, via which the actual rubbing of the cover takes place by means of a plurality of press rollers 17. The gripping device 1 is therefore designed both for rubbing the cover and for pressing off the book block pages. As can be seen, the book block is first fixed by the side press devices 8 and then transported through the area of the back press 16.

It should also be noted at this point that, like the guide device 5, the spacing of the press belts can of course also be adjusted to different book thicknesses, wherein the contact pressure can additionally be regulated by this distance in the side press devices 8.

How out Fig. 3 4, the longitudinal conveyor 14 comprises a first conveyor section I and a second conveyor section 11, wherein the second conveyor section 11 comprises the press-back device 16 with the press rollers 17. Both conveyor sections I, II corresponds to a portion of the working strand of the conveyor belt 15, which is returned below again. In this case, in the grinding device 1 according to the invention, there are now two further adjustment possibilities, which are respectively realized via eccentric 18. On the one hand, the first conveying section I can be changed in its position relative to the second conveying section II connected downstream thereof, specifically pivotable and height-adjustable about a horizontal axis perpendicular to the conveying direction 19. For this purpose, the first two eccentrics 18 are used in the conveying direction, while the following two eccentrics 18 are assigned to a pressure adjustment device for the back pressing device 16. Both will now be related to the Fig. 4 and 5 explained in more detail.

Fig. 4 shows a sectional view in the region of the first conveying section I. It is apparent that the conveyor belt 15 is guided there via an inlet-side guide roller 20 and an outlet-side guide roller 21. Between the first conveyor section I and the second conveyor section II is a spring-loaded Deflection pulley 22 is provided for the conveyor belt 15, via which a possibly necessary length compensation takes place.

Below the Arbeitstrums of the conveyor belt 15 in the first conveying area I is now, laterally between in Fig. 3 guided to see metal elements 23, a roller carrier 24 is arranged, on the transport rollers not shown here, the conveyor belt 15 is guided. At its inlet side and its outlet end, the roller carrier 24 has recesses 25, 26. The roller carrier 24 may be formed as a frame, wherein then on both sides mutually aligned recesses 25, 26 are provided. In these recesses now engage discs 27 of the eccentric 18 each one. The discs 27 are eccentrically fixed as known on a continuous rotary shaft 28 which is guided and supported by the metal elements 23. A rotation of the respective rotary shaft 18 now leads in a known manner to a height adjustment of the roller carrier 24, wherein the rotary shafts continue 28 through the outer panels 2 and end there in a knob 29 for user adjustment. The knobs 29 are independently operable, so that an independent height adjustment on the inlet side and outlet side end of the roller carrier 24 is made possible, therefore, a pivoting can be realized. However, a height adjustment of the entire roller carrier 24 is possible if both eccentrics 18 are actuated simultaneously.

In order to allow a compensation of the displacement of the roller carrier 24 with independent actuation of the two eccentrics, the input-side recess 25 is seen to be laterally expanded.

By adjusting the first conveyor section I can thus be determined, as the book block of the side already in the first conveyor section I attacking side pressing 8, see. Fig. 1 , are received and the back press 16 are supplied. In this way, the quality of the resulting product can be improved because of the concrete position of the book block and manufacturing tolerances can be addressed.

Regarding Fig. 5 Now, the pressure-adjusting device of the back press 16 will be described in more detail. The press rollers 17 are arranged in pairs in the present example on roller blocks 30, which follow one another in the conveying direction 19. The roller blocks 30 and thus the press rollers 17 are supported elastically by means of spring elements 31 which are placed on corresponding mandrels on a carrier frame 32 designed as a support carrier 33, respectively left side and right side of the conveyor belt 15, the lower run 34, as shown Fig. 5 can be seen, is passed through the support frame 32.

The spring elements 31 and the position of the support frame 32 thus define the contact pressure of the pressure rollers 17, which in particular can be adjusted individually for each pressure roller pair 17 at the factory. In the rubbing device 1 according to the invention, however, the user also has the option of adapting the pressure conditions to his needs. For this purpose, in the support frame 32 in turn on the inlet side and outlet side recesses 35, 36 are provided which receive the discs 27 of eccentrics 18, which in turn are arranged on rotary shafts 28. The shafts 28 in turn carry the disc 27, the support frame 32. Thus, the support frame 32 on the inlet side and outlet side independently user side via knobs 29 height adjustable, so effectively a height adjustment of the entire support bracket 33 (resulting in a general increase or decrease of the contact pressure) and a pivoting of the support carrier 33 (generation of different pressure zones) is conceivable. For example, the contact pressure to the rear roller blocks 30 can be increased or the like. Also, this additional adjustment makes it possible to obtain higher quality products.

It should also be noted that in principle it would also be possible to operate both the longitudinal conveyor 14 and the side press devices 8 via a common drive device.

Of course, other embodiments of the height adjustment are conceivable within the scope of the invention, for example via screw thread or hydraulic / pneumatic solutions, even if they are not shown here. Other and additional options are possible. For example, in the context of the present invention, tilting about the conveying direction 19 as an axis or pivoting about a vertical axis would also be conceivable in principle. However, it has been shown that the settings shown here already lead to an excellent improvement in the quality of the final product.

Claims (15)

Serving device (1) for rubbing a cover against a book block spine of a book block, comprising two side pressing devices (8) acting on the book block and a back pressing device (16) acting on the back of the book block vertically fixed in the side pressing devices (8), in particular with a plurality of press rollers (17 ), by which the book block by means of a longitudinal conveyor (14) on which the book block rests with the book block back, is transportable, characterized in that the longitudinal conveyor (14) has a first conveyor section (I) and a downstream in the conveying direction (19) second Conveyor section (II) with the back press device (16), wherein the first conveyor section (I) in its position relative to the second conveyor section (II) by means of an adjusting means is adjustable. Grinding device according to claim 1, characterized in that the side pressing means (8) comprise a pressing band (9) acting on the lower edge of the book block. Grinding device according to claim 1 or 2, characterized in that the first conveying section (I) relative to the second conveying section (II), in particular about a horizontal axis perpendicular to the conveying direction (19), pivotable and / or, in particular in height, is displaceable. Grinding device according to one of the preceding claims, characterized in that the adjusting means comprises an inlet-side and an outlet-side height adjustment device, which height adjustment devices are independently or jointly actuated. Grinding device according to one of the preceding claims, characterized in that the first conveying section (I) comprises a below the conveying plane arranged movable roller carrier (24) provided at its inlet side and its outlet end end recesses (25, 26), in which recesses (25, 26) engages a disc (27) of an eccentric (18) for height adjustment. Grinding device according to claim 5, characterized in that one of the recesses (25) is laterally extended to compensate for the independent eccentric movements. Grinding device according to one of the preceding claims, characterized in that the back pressing device (16) comprises a pressure adjusting device for adjusting the rubbing pressure. Grinding device according to claim 7, characterized in that the back pressing device (16) comprises a support support (33), in particular a support frame (32) against which the otherwise guided press rollers (17) elastically, in particular by means of at least one spring element (31), support, which support carrier (33) is designed to be height-adjustable at least at one point. Grinding device according to claim 8, characterized in that the support carrier (33) provided at its inlet side and its outlet end end recesses (35, 36), in which recesses (35, 36) a disc (27) of an eccentric (18) for height adjustment intervenes. Grinding device according to claim 9, characterized in that one of the recesses (35) is laterally extended to compensate for the independent eccentric movements. Grinding device according to one of the preceding claims, characterized in that the longitudinal conveying means (14) comprises an engaging on the book block back, both conveyor sections (I, II) continuous conveyor belt (15). Grinding device according to claim 11, characterized in that the conveyor belt (15) is guided between the conveyor sections (I, II) via a preferably spring-mounted deflection roller (22). Grinding device according to claim 11 or 12, characterized in that the press rollers (17) of the back press device (16) are elastically supported on both sides on the support frame (32) carrying support (33) through which the lower run (34) of the conveyor belt (15). is guided. Grinding device according to one of the preceding claims, characterized in that the side pressing devices (8) and the longitudinal conveyor (14) comprise a common drive device and / or operated by matched drive devices (12, 13). Grinding device according to one of the preceding claims, characterized in that the side pressing means (8) for attacking the book block is already formed in the region of the first conveying section (I).

Images