EP2465695A1 - Method and device for pressing a book block - Google Patents

Abstract

A rounded back (2) of book block (1) is clamped between two clamping jaws (41) that are arranged parallel to longitudinal axis (3) of book block. A pressing structure (6) is aligned parallel to longitudinal axis of book block and is movable perpendicular to longitudinal axis of book block so as to press the middle of the rounded back of book block. An independent claim is included for device for pressing book block.

Description

The invention relates to a method for pressing a book block with rounded back according to claim 1 and an apparatus therefor according to claim 14 and a book production line with such a device.

In book blocks, for example, a plurality of signatures and / or single sheets are bound according to a common design, each individual signatures comprising several pages of a book. Alternatively, individual pages can be linked directly. In the production of book blocks, the signatures are first folded into stacks until a desired page size is available for a book block. The folded sheets of a book block are precisely back to back superimposed and tied there, so that a common flat block back arises. In the case of the alternative design with bound single pages, the procedure is analogous, so that a book block with a flat block spine is also created.

In a further method step, the rounding, the signatures and / or single sheets are displaced in a direction perpendicular to the block spine parallel to each other. In this case, the middle folded sheets emerge with their backs from the flat block spine and there is a round back of the book block. Other rounding methods work in addition to the above-described roll round principle, for example, the so-called. Hammer beam principle.

From the EP1872963A2 or the EP0676303B1 Methods are known in which after the processing step of rounding a machine pressing a clamped in a region near the back, already rounded book block is performed by means of known bar-like punch as a tool.

The interchangeable, mostly concave-shaped tools used for the known squeezing in a press beam are available in a narrow-stepped manner and are exchanged to suit the rounding of the back of the book block. The replacement of these tools is usually done in a manual process and is expensive.

However, a book production line for the industrial production of books requires a fast automatic setup of each device of the book production line for job changes, especially for small and very small runs, which are understood as so-called on-demand orders and a single-book production. However, this is hindered when manual setup processes are required.

From the US3280413A is a manual method is known in which a pressing operation is realized by means of a solid roller. By hand, a book block is first inserted into the apparatus with the spine pointing downwards so that the book block is placed above the roller lengthwise. The book block remains in the same position for the rounding and pressing off steps and is then removed manually from this position. For this purpose, a combined interaction of rounding and pressing tools is required.

In this solution, the book block is clamped with rounding between two bars. To round the back, movements of the beams and the rounding devices are coordinated. The roundness of the spine is determined by sensing the thickness of the book block used and by manual presetting. The scan specifies a swing curve of the roller pressing off the spine. The roller passes for pressing alternately, sometimes several times, holding the book block held in position on an arcuate path adapted to the back rounding. However, this solution has due to the taking place in one and the same position rounding and pressing a very high mechanical complexity and a very low productivity.

There are also known various, in particular designed as interchangeable tools compacts. These are, for example, rollers or plates, which are either pressed only vertically against the back of the book block or stroke in a combined arrangement of a pressing and rounding a scan following the back.

The object of the invention is to provide a method and a device for high-quality pressing of a book block, which can be carried out automatically or which can be operated automatically and does not require a change of order due to replacement of tools.

The object is achieved by a method having the features of claim 1 and a device having the features of claim 14. Advantageous embodiments are specified in the respective subclaims.

The book block to be wiped off by the method or apparatus has a rounded spine and a longitudinal axis running along the spine, and according to the invention is subjected to the sequentially proceeding process steps described below.

The book block is first clamped on both sides in a region near the back parallel to the longitudinal axis of the rounded back between two clamping jaws. Subsequently, a compact is at least once moved against the rounded back of the firmly clamped book block, thereby perpendicular to the longitudinal axis and in the middle or at least approximately in the middle of the rounded back placed on this. In the subsequent pressing, the compact is moved over at least a portion of the spine. The compact presses the book block parallel to the longitudinal axis over the back away, where it follows at least one infinitely pre-selectable, lying in a plane perpendicular to the longitudinal axis of the back plane trajectory.

Preselectable means that the requirements of previous processes or changed orders can be met by adjusting parameters of the method or device. Preselecting also means that settings control the press device before or while the book block is being clamped. Such an adjustment may also occur for quality reasons during a job, such as when the speed of book production varies.

The device according to the invention has a clamping device and a pressing device. In the clamping device, two clamping jaws are arranged parallel to each other. The book block can be aligned with its back parallel to its longitudinal axis between the jaws, for example, after a feeder has raised or lowered the book block in the correct position. The jaws serve for clamping the book block on both sides. The jaws are mounted on each other, usually in the horizontal direction, so that the book block can be clamped in a region near the back between the clamping jaws.

The pressing device has a movably mounted compact and is used for vertical movement of the compact perpendicular to the longitudinal axis against the back of the book block and for lifting the compact from the book block. The parallel to the longitudinal axis of the spine aligned press body is placed in a preselectable position on the back.

The compact is in the position assumed by the placement in the pressing device of a continuously selectable path of movement over the back of the book block movable. The trajectory lies in a plane spanned perpendicular to the longitudinal axis of the spine.

With this principle, a condition for intermittent or continuously variable Abpressvorgänge an industrial book production is created.

The vote of the Abpressvorganges on the product is possible in this way with the structured in simple movements less components process without manual intervention. Compared to the state of the art, processes previously combined with one another in complicated apparatuses have been separated into automatically controllable process steps. Process steps that required a tool change according to the prior art could be replaced and corresponding set-up times are eliminated. With the device can thus be more flexible than previously reacted to faster changing requirements.

The movement of the compact usually begins with placement in or near the center of the book block and subsequently describes an arcuate path. Due to this from the book block center outwardly extending path of the compact material displacement takes place in the back of the book block. With the material displacement is accompanied by a plastic deformation of the back, whereby the desired Abpresseffekt is achieved.

Thus, it is possible by infinitely preselectable trajectories, a return to the starting position movement of the compact to assign a slightly different from that during the pressing movement different course. Thus, an unwanted deformation of the already previously pressed back can be avoided and assigned to any rounding of the back an approximately ideal trajectory with a tangential contact of the compact in each case in the uppermost point of the back.

The plastic deformation caused by the compact under the support of the clamping jaws can, for example, be constant from the inside to the outside. It is considered advantageous if the plastic deformation increases from the book block center to the outside. As a result, the leaves of the finished book can be relieved because the back is stabilized by the plastic deformation.

Corresponding courses of the trajectory can be stored and retrieved product-related or derived from format parameters of the products to be produced, so that an automated processing of small, very small and individual editions is possible.

According to an advantageous embodiment of the method, the at least one movement path of the compact is predetermined by a variably configured gear. On the gear acts a first actuator. The actuator adjusts the transmission according to a specification, before the compact is moved on the preselected thereby, at least one trajectory over the back of the book block.

The gearbox can be integrated as a robust component in the pressing device and can be steplessly controlled externally via the first actuator.

According to a further advantageous embodiment of the method, the compact is first moved in a first portion of the trajectories from the center of the back outwards to a first side of the book block before the compact lifted from the back of the book block and following another trajectory again to the center of Back is moved, but without having contact with the back. There, the compact is placed again on the back of the book block and presses this, at least another section of one of the trajectories following, from the center outwards to an opposite, second side of the book block.

According to a further advantageous embodiment of the method, the compact is moved on its way from at least one of the two sides of the book block to the center of the back on a path which is opposite to the trajectory of the compact on its way from the center to one of the two sides of the book block having different radius. If the movement path of the compact to the middle of the spine has a larger radius, the lifting of the compact from the back is advantageously integrated into the respective trajectory. In this type of pressing is avoided that disturbances in a once pressed-off portion of the back result, for example, by repainting the same portion in the reverse direction. Of course, the compact can also be moved on a path to the center of the back, which has a relation to the trajectory of the previously performed pressing smaller radius, whereby the book block can be advantageously further pressed.

According to a further advantageous embodiment of the method, the at least one movement path of the compact is determined by means of a control unit from book block parameters and transmitted by means of the first actuator to the transmission. This concrete design possibility makes it possible to respond to changes in the preferred promoted by the book production line product flow while saving appropriate sensors.

According to a further advantageous embodiment of the method, the compact body presses at least a portion of the back several times. Furthermore, the first actuator can also adjust the transmission during the pressing, so that the section can be pressed in each case with increasing pressure. Repeated overpainting of the back may be beneficial for certain materials. If, in such cases, the same pressure were to be applied to the back in just a single sweep, or in other words a simple squeeze, it could possibly lead to destruction. The advantage here is possibly in quality improvements. There is thus a possibility to react in particular to changes in the choice of material.

According to a further advantageous embodiment of the method, the trajectory or trajectories are determined in dependence on a single or several book block parameters, such as the width, the material or the type of binding of the book block, or the curvature of its back.

According to a further advantageous embodiment of the method, the compact is independent of the preselected trajectory during pressing against a resistance of the back movable to realize an overload protection, so that exceeding a maximum pressing pressure is avoided by avoiding the trajectory. Such an overload protection ensures a high level of quality and a high level of operational safety.

According to a further advantageous embodiment of the method, the transmission is moved together with the compact vertically in a stationary frame. A placement of the compact on and a lifting of the compact from the back are thus possible without changing the arrangement of the compact in the transmission. For the adjustment in a preferred vertical direction only a control unit and an actuator designed in particular as a drive are required in a minimal case. In addition, a format adjustment device can be provided for the superimposed vertical movement of the compact. Depending on one of the book block parameters, for example the thickness of the book block, this will be the top one corrected setting and lifting of the compact corrected by a vertical actuator shortened or extended a distance between a fixed point and the compact in the vertical direction.

According to further advantageous embodiments of the method, the transmission for moving the compact according to a first embodiment, at least two by means of the first actuator horizontally and preferably symmetrically displaceable, designed as a carriage gear elements each having two groove curves. According to a second embodiment, the transmission has at least two by means of the first actuator horizontally and preferably symmetrically toward each other or away from each other movable, constructed as a lever gear elements each having a rotatably mounted in a respective pivoting crank lever. The compact is mounted by means of a traverse in the Nutkurven or the crank levers. By means of this transmission, the movement path is preselected in that the first actuator moves the transmission elements horizontally towards or away from each other.

The two embodiments for the implementation of the transmission are basically the same effect. The first embodiment represents a certain extent a simplification compared to the second embodiment, since pivot points are eliminated. Other alternative embodiments of the transmission with coupling, crank and rocker come for similar implementation into consideration. Also, the embodiments may be performed with multiple components, for example with four transmission elements.

According to a further advantageous embodiment of the method, the traverse travels the trajectories in the groove curves, after the transmission elements have been moved relative to each other if necessary. What is needed is such an adjustment of the transmission, for example, when switching from a thinner to a thicker book block or book blocks with different curves. Alternatively, according to the second embodiment, first, if necessary, the designed as a lever gear elements are shifted from each other. In both embodiments the first actuator acts exclusively in horizontal directions on the two gear elements. As a result, a different path of movement of the compact is established in the transmission.

According to an advantageous embodiment of the device, the pressing body has a flat pressing surface facing the back of the book block. The pressing body of alternative embodiments has a convex pressing surface facing the back of the book block to be pressed. This compact is preferably designed as a partial or solid cylinder. The surfaces of the compacts are in particular corrugated, grooved or smooth. The device thus offers great flexibility with regard to the design of the compact. A change of the compacts due to a job change is eliminated.

According to a further advantageous embodiment of the device according to the invention, the pressing device of the device has a transmission which is variable by means of a first actuator.

According to a further advantageous embodiment, the transmission is arranged together with the compact in the pressing device. The pressing device is mounted vertically displaceable in a stationary frame.

Thus, in the industrial process of book production, it is not problematic to supply book blocks to the device when the pressing device is raised, for example, upwards. Also, a vertical compensation for a change in position of the compact in the vertical direction is possible due to the adjustment of the transmission by a second actuator. Pressing device and compacts are adjusted together with only one actuator or each with its own actuator. The second actuator also has an overload function in the vertical direction, so that damage to the compact can be avoided.

According to a further advantageous embodiment, the transmission has two transmission elements that are horizontally and symmetrically adjustable by the first actuator. Such transmissions are robust and inexpensive.

As already described in the method, the gear elements can be advantageously designed as a horizontally displaceable carriage. The transmission has an inner and an outer transmission element. The inner gear member is disposed along the longitudinal axis of the back viewed at least partially within the outer gear member. Each gear element has in each case at least one groove curve on opposite sides in the direction of the longitudinal axis of the back of the book block, into which the compact can be coupled by means of a crossbeam. The compact is thereby movable parallel to the spine of the book block.

Alternatively, the symmetrically mutually adjustable gear elements each have at least one pivot point, which can be moved towards and away from each other. In each case, a crank lever is rotatably mounted in the pivot points, wherein in the crank lever, connecting them together, a parallel to the longitudinal axis of the back aligned, connected to the compact cross member is coupled. Since the pivot points of the transmission elements with the crank levers mounted therein are arranged at a distance from the traverse, a crank mechanism is realized.

According to a further advantageous embodiment, the traverse and the compact are made in one piece.

Such a component is inexpensive to manufacture and stiff executable over its length. A deflection of the compact is counteracted. Alternatively, the press body having an axle is rotatably mounted on both end faces about its axis in the traverse. Reference is made to the advantages mentioned for the corresponding embodiments of the method.

According to a further advantageous embodiment, the traverse consists of both sides of the compact body the compacts overlapping plates. The respective plate has in the axial direction of the compact on both sides of the compact by a distance from the center of the compacted spaced at least two hinge points. Depending on the embodiment, either a rocker arm or a crank lever is movably received in the articulation points. According to the first embodiment, the rocker arm is guided in each case one of the groove curves. According to the second embodiment, each one of the crank levers is movably received in one of the bearing points pivotally.

According to an advantageous embodiment, the rocker arm is designed as a roller plate. The roller plate has the Nutkurve facing rollers, which are intended to engage in the cam groove. Facing away from the groove cam, the roller plate particularly preferably has an articulated receptacle for the compact, wherein the compact can be accommodated indirectly, particularly preferably outside its center.

According to a further advantageous embodiment, a drive is provided as the first actuator, which is formed by means of a single horizontal actuating element, in particular a spindle, acting on the transmission. For a precise and very reliable adjustment of the pressing element is realized.

According to a further advantageous embodiment, the compact is drivable via a vibrating mechanism for pressing the spine along the trajectory.

According to a further embodiment of the device, the pressing device is coupled to an overload unit such that the overload unit is arranged between the pressing device and the frame of the device. The overload unit preferably has a spring assembly, which is formed in the horizontal direction parallel to the direction of movement of the transmission to the pressing device acting. The spring assembly allows the compact in case of overload of the preselected Departure path to avoid damage to the compact.

The device is preferably used in a book production line.

The invention will be explained in more detail with reference to figures.

Figur 1

eine Seitenansicht eines ersten Ausführungsbeispiels einer erfindungsgemäßen Vorrichtung, mit einem zentral oberhalb eines Buchblocks angeordneten, vom Buchblock abgehobenen Presskörper,

Figur 2

eine Seitenansicht der Vorrichtung aus Figur 1, mit auf dem Buchblock aufgesetztem Presskörper,

Figur 3

eine Seitenansicht der Vorrichtung gemäß Figur 2, mit nach links verschwenktem Presskörper,

Figur 4

eine Seitenansicht der Vorrichtung gemäß Figur 2, mit nach rechts verschwenktem Presskörper,

Figur 5

eine Seitenansicht eines zweiten Ausführungsbeispiels einer Vorrichtung, mit einem zentral oberhalb des Buchblocks angeordneten, auf den Buchblock aufgesetzten Presskörper,

Figur 6

eine Seitenansicht der Vorrichtung gemäß Figur 5, mit nach links verschwenktem Presskörper,

Figur 7

eine perspektivische Ansicht der Vorrichtung gemäß Figur 2,

Figur 8

eine Seitenansicht auf die Vorrichtung gemäß Figur 2, mit einem schmalen Buchblock und einem dementsprechend verstellten Getriebe und

Figur 9

eine Seitenansicht der Vorrichtung gemäß Figur 8, mit nach links verschwenktem Presskörper.

Show it

FIG. 1

a side view of a first embodiment of a device according to the invention, arranged with a centrally above a book block, lifted from the book block compacts,

FIG. 2

a side view of the device FIG. 1 , with pressed body placed on the book block,

FIG. 3

a side view of the device according to FIG. 2 , with pressed body pivoted to the left,

FIG. 4

a side view of the device according to FIG. 2 , with pressed body pivoted to the right,

FIG. 5

a side view of a second embodiment of a device, with a centrally located above the book block, placed on the book block compacts,

FIG. 6

a side view of the device according to FIG. 5 , with pressed body pivoted to the left,

FIG. 7

a perspective view of the device according to FIG. 2 .

FIG. 8

a side view of the device according to FIG. 2 , with a narrow book block and a correspondingly adjusted gear and

FIG. 9

a side view of the device according to FIG. 8 , with pressed body pivoted to the left.

For the sake of clarity, not all reference numbers are entered in all figures.

The FIGS. 1 to 4 and 7 to 9 show a first embodiment of a device 5 according to the invention with a book block 1, 1 'clamped therein, wherein two different formats of the book block 1, 1' are shown. The book block 1 of FIGS. 1 to 4 and 7 is thicker than the narrow book block 1 'of FIGS. 8 and 9 ,

The book block 1, 1 'to be removed by the method or the device 5 has a rounded back 2, 2' with a longitudinal axis 3 running along the back 2, 2 ', which extends through a line of intersection of a median plane 9 through the book block 1, 1 'is formed with the rounded back 2, 2'.

The Figures 5 and 6 show a second embodiment of a device 5 'according to the invention in the positions of Figures 2 and 3 , The second embodiment differs from the first embodiment in terms of a built-in a pressing device 7 variable transmission 10, 10 '.

Common to both embodiments is the installation situation of the pressing device 7, which is accommodated vertically by means of a second actuator 78 movable in a stationary frame 70 of the device 5, 5 '. In addition, the pressing device 7 depends in a frame joint 74th

The device 5, 5 'has below the pressing device 7 in the frame 70, a clamping device 40 for the book block 1, 1'. In the clamping device 40, two clamping jaws 41 are arranged parallel to each other. The book block 1, 1 'is aligned with its upward, the pressing device 7 facing back 2, 2' with the longitudinal axis 3 parallel to the clamping jaws 41 between them. The clamping jaws 41 are movably mounted in the horizontal direction, so that the book block 1, 1 'can be clamped on both sides in a region 4 near the back between the clamping jaws 41 and can be fixed relative to the frame 70 in a stationary manner.

In the vertical direction can be applied to the thus provided back 2, 2 'by means of a compact 6 of the pressing device 7, a pressing pressure. The purpose provided pressing device 7 is used for vertical movement of the compact 6 perpendicular to the longitudinal axis 3 against the back 2, 2 'of the book block 1, 1'. According to the in the Figures 2 and 5 shown positions, the pressing device 7 with the parallel to the longitudinal axis 3 of the back 2, 2 'aligned compact 6 in the middle of the rounded back 2, 2' placed on this. Apart from this preferred variant, the compact 6 can, of course, also be placed approximately in the middle, ie in an area adjacent to the middle of the back 2, 2 '.

The pressing body 6 is rotatable about an axis 19 and approximately continuously along a not shown, preselectable trajectory continuously movably received in the pressing device 7 according to the illustrated embodiments. In its position assumed by the placement of the pressing body 6 following the movement path over the back 2, 2 'of the book block 1, 1' movable. The trajectory lies in a plane perpendicular to the longitudinal axis 3 of the spine 2, 2 'and represents an at least approximate circular path which follows at least approximately a circular path running through the curve of the spine 2, 2'.

The coordination of the movement path following, approximately horizontal movement takes over the transmission 10, 10 '. The transmission 10, 10 'is arranged in the pressing device 7 and can be moved together vertically in the frame 70 with this. Between the pressing device 7 and the frame 70, an overload unit 72 is coupled in the horizontal orientation. The overload unit 72 has a spring assembly 77 which acts in both horizontal directions parallel to a direction of movement 25 of the transmission 10, 10 '. If excessive pressure is applied to the book block 1, 1 ', the spring assembly 77 springs against a spring resistance, ie the pressing device 7 deviates accordingly.

The further description is based on a vertical position of the pressing device 7, in which the compact 6 is already in contact with the spine 2, 2 '. The compact 6 is designed in the figures as a solid cylinder with a convex pressing surface 8. Alternative forms are partial cylinders up to compacts with flat pressing surfaces.

The transmission 10, 10 'of both embodiments has two by a first actuator 53 horizontally and symmetrically to each other, continuously variable transmission elements 11, 21; 81, 82 on. The need for such adjustment of the transmission 10, 10 'is obtained by direct comparison of Figures 3 . 6 and 9 showing the compact 6 in a state pivoted out to the left. The Figures 3 and 9 differ in the thickness of the book block 1, 1 'and of course in the width of the back 2, 2'. The movement path of the compact 6 is determined by means of a control unit 54 connected to the first actuator 53 in accordance with the thickness of the book block 1, 1 'and transmitted to the transmission 10, 10' by means of the first actuator 53. Of course, the trajectory of the compact 6 can also be determined as a function of another book block parameter, such as the material or the type of binding of the book block 1, 1 ', or the curvature of its back 2, 2'. Likewise, a combination of several book block parameters is possible to determine the movement path of the compact 6.

As actuator 53 for the variable transmission 10, 10 'is provided according to the illustrated embodiments, a drive which is formed by means of a single horizontal, for example, designed as a spindle actuator 50 on the gear 10, 10' acting.

According to the first embodiment, horizontally displaceable carriages are provided as gear elements 11, 21 which are adjustable symmetrically with respect to each other. In this case, an inner gear member 11 along the longitudinal axis 3 of the back 2, 2 'seen within an outer gear member 21 is arranged. The gear elements 21, 11 are horizontally in the direction of movement 25 of the transmission 10 and thus perpendicular to the longitudinal axis 3 of the back 2, 2 'to each other. They have parallel to the direction of movement 25 in vertical planes on both sides of the compact 3 mutually spaced front walls 26 and rear walls 18. The front and rear walls 26, 18 form parallel with the longitudinal axis 3 of the back 2, 2 'aligned side walls 14, 24 each seen in cross-section a rectangle (see. Fig. 7 ).

The side walls 14, 24 have congruently arranged through holes 17, 27 which receive along the direction of movement 25 of the transmission 10 displaceable guide rods 51. According to the second embodiment, the through holes 17, 27 are in a guide 89 for the gear elements 81, 82. At the ends of the guide rods 51 of a page, a mounting plate 55 is screwed. The mounting plate 55 carries the first actuator 53 for the parallel to the guide rods 51 arranged actuator 50, which has two non-illustrated areas with opposite threads. The outer gear member 21 engages with a first spindle nut 56 in the thread of one of the areas. The inner gear member 11 engages with a second spindle nut 57 in the thread of the second area ( Fig. 1 . Fig. 8 ). With the same pitch of the thread following a rotation of the actuating element 50 to the book block 1, 1 'symmetrical movements in the horizontal direction of movement 25th

Each gear element 11, 21 has in the direction of the longitudinal axis 3 of the back 2, 2 'opposite sides in the front and rear walls 26, 18 each have a groove curve 12, 13, 22, 23. Each groove curve 12, 13, 22, 23 extends along an upper circular arc portion about an unillustrated center, which centers are each aligned parallel to the longitudinal axis 3 of the back 2, 2 '(see. Fig. 4 ). The inner Gear element 11 has the outer gear member 21 facing outer groove curves 12, 13 and the outer gear member 21 to the inner gear member 11 facing inner Nutkurven 22, 23.

In each case between the front walls 26 and between the rear walls 18 of the gear elements 11, 21 a parallel to the direction of movement 25 and perpendicular to the longitudinal axis 3 of the back 2, 2 'aligned plate 33 is arranged, the rotatably receive the pressing body 6 on both end sides about its axis 19 , The two non-interconnected plates 33 form a traverse 30 and could alternatively be connected to each other.

Each of the plates 33 has on the left and right above the recorded compact 6 each have a hinge point 31, 32. In a first of the hinge points 31 facing the outer gear member 21, a first formed as a roller plate rocker arm 35 is pivotally received. In a second of the hinge points 32 facing the inner gear member 11, a second formed as a roller plate rocker arm 36 is pivotally received. The total of four rocker arms 35, 36, ie two rocker arms per plate 33, each have at least two rollers 37 above the respective associated pivot point 31, 32 ( Fig. 4 ). The rollers 37 of each rocker arm 35, 36 are arranged so as to be able to engage in their entirety in one of the groove curves 12, 13, 22, 23 can. As a result, a certain amount of leverage by means of the rollers 37 on the roller plate 35, 36 can be transferred.

Alternatively, according to the in the Figures 5 and 6 illustrated second embodiment, four substantially symmetrical pairwise lever formed as symmetrical to each other sliding gear elements 81, 82. A pair of gear members 81, 82 on one side of the cross member 30 has first and second levers. The gear elements 81, 82 are each connected by means of a crank lever 85, 86 which is rotatably mounted in a pivot point 87, 88 of the respective gear member 81, 82, each having one of the hinge points 31, 32 of the plate 33.

Lower ends of the gear elements 81, 82 move horizontally towards each other when moving the gear 10 'toward or away from each other, wherein the pivot points 87, 88 are arranged in the lower ends of the gear elements 81, 82.

The coupled into this or comparable manner in the traverse 30 pressing body 6 is by means of a swing mechanism 60 parallel to the longitudinal axis 3 of the back 2, 2 'movable. Also, a one-piece embodiment of the traverse with an integrated compact is conceivable. The oscillating mechanism 60 drives the compact 6 to press the spine 2, 2 'along the trajectory.

To illustrate a method according to the invention, the first embodiment in the FIGS. 2 to 4 during a rolling of the compact 6 shown in snapshots. It shows the FIG. 2 a starting position in which the pressing body 6 on the longitudinal axis 3 of the back 2, 2 'touches on this. In FIG. 3 is the compact 6 to the left, the second side 16 and in FIG. 4 swung to the right, to a first page 15 of the book block 1.

Corresponding FIG. 4 is the according FIG. 2 Pressed on the book block 1 press body 6 for pressing the book block 1 in a first portion of the trajectories initially from the center of the back 2 outward to the first page 15 of the book block 1 method. Subsequently, the compact 6 is returned on the same trajectory to the center of the spine 2 before it presses the book block 1 at least a further portion of one of the trajectories from the center outwards to one of the first side 15 opposite second side 16 ( FIG. 3 ).

Alternatively, the pressing body 6 is first lifted after the first page 15 of the book block 1 pressing off the back 2 of the book block 1 and, without contact to the back 2, another movement path to the middle of the back 2 moves there again on the back. 2 placed and then used for further pressing the book block 1 to the second page 16. In this case, the pressing body 6 on its way from at least one of the two sides 15, 16 of the Book block 1 to the center of the back 2 are moved on a movement path which relative to the movement path of the compact 6 on its way from the center to one of the two sides 15, 16 of the book block 1 has a larger radius. With both alternative solutions described disturbances of an already pressed-off portion of the back 2 can be avoided. Of course, the compact 6 can also be moved on a path to the center of the back 2, which has a relation to the path of movement of the previously performed pressing smaller radius, whereby the book block 1 can be advantageously further pressed.

Both the pressing of a thin book block 1 'according to the FIGS. 8 and 9 as well as the pressing of a book block 1 with a device 5 'according to the Figures 5 and 6 is essentially analog.

Claims (30)

Method for pressing off a book block (1, 1 ') having a rounded spine (2, 2') and a longitudinal axis (3) running along the spine (2, 2 '), the squeezing being carried out via the rounded spine (2, 2) 2 ') takes place with the successive process steps: The book block (1, 1 ') is clamped on both sides in a region (4) near the back parallel to the longitudinal axis (3) of the rounded back (2, 2') between two clamping jaws (41), A pressing body (6) is moved at least once against the rounded back (2, 2 ') of the book block (1, 1'), perpendicular to the longitudinal axis (3) and in the middle or at least approximately in the middle of the rounded back ( 2, 2 ') placed on this and subsequently at least over a portion of the back (2, 2') moves, wherein • The pressing body (6) the book block (1, 1 ') on at least one continuously selectable, in a plane perpendicular to the longitudinal axis (3) of the spine (2, 2') plane lying movement path, parallel to the longitudinal axis (3) over the back (2, 2 ') squeezes. A method according to claim 1, characterized in that the at least one movement path of the compact (6) by a variably ausgestaltetes transmission (10, 10 ') is predetermined, wherein a first actuator (53) according to a specification continuously a certain adjustment of the transmission (10 , 10 ') before and / or during the pressing body (6) over the back (2, 2') is moved. Method according to claim 1 or 2, characterized in that the pressing body (6) in a first section of one of the trajectories first from the center of the spine (2, 2 ') outwards to a first side (15) of the book block (1, 1 ') is moved, the pressing body (6) then from the back (2, 2') of the book block (1, 1 ') lifted and without contact to the back (2, 2') following another trajectory, again to the middle of the back ( 2, 2 ') is moved, the pressing body (6) there again on the back (2, 2 ') of the book block (1, 1') is placed and the back (2, 2 ') at least a further portion of one of the trajectories following from the center outwards to an opposite, second side (16) of the book block ( 1, 1 ') presses. A method according to claim 3, characterized in that the pressing body (6) moves on its path from at least one of the two sides (15, 16) of the book block (1, 1 ') to the center of the spine (2, 2') on a path of movement which has a radius different from the movement path of the compact (6) on its way from the center to one of the two sides (15, 16) of the book block (1, 1 '). Method according to claim 2 to 4, characterized in that the at least one movement path of the compact (6) is determined by means of a control unit (54) and transmitted to the transmission (10, 10 ') by means of the first actuator (53). Method according to one of claims 1 to 5, characterized in that the pressing body (6) repeatedly presses at least a portion of the back (2, 2 '). Method according to one of claims 1 to 6, characterized in that the at least one trajectory is determined in dependence on a single or several of the following book block parameters: the thickness, the material or the type of binding of the book block (1, 1 ') or the curvature of his back (2, 2 '). Method according to one of claims 1 to 7, characterized in that the pressing body (6) during a rolling on the back (2, 2 ') of the following at least one movement path rotates. Method according to one of claims 1 to 8, characterized in that the pressing body (6) during pressing for realizing an overload protection regardless of the preselected trajectory against a resistance of the back (2, 2 ') is movable, so that exceeding a maximum pressing pressure is avoided by avoiding the trajectory. Method according to one of claims 2 to 9, characterized in that the gear (10, 10 ') for placing and for lifting the compact (6) on or from the back (2, 2') together with the compact (6 ) is displaced in a stationary frame (70). Method according to one of claims 2 to 10, characterized in that the transmission (10, 10 ') for moving the pressed body (6) at least two by means of the first actuator (53) horizontally and preferably symmetrically to each other displaceable gear elements (11, 21) in each case two groove curves (12, 13, 22, 23) or at least two by means of the first actuator (53) horizontally and preferably symmetrically toward each other or away from each other movable transmission elements (81, 82) each having a in a respective pivot point (87, 88 ) rotatably mounted crank lever (85, 86), in which the pressing body (6) by means of a crossmember (30) is mounted, and that by means of this transmission (10, 10 '), the movement path is selected by the first actuator (53) the gear elements (11, 21) and the gear elements (81, 82) are moved horizontally toward or away from each other. A method according to claim 11, characterized in that the traverse (30) after the relative movement of the gear elements (11, 21), the trajectory in the groove curves (12, 13, 22, 23) descends. A method according to claim 11, characterized in that the traverse (30) after the relative movement of the transmission elements (81, 82) travels the path of movement by pivoting the crank lever (85, 86) relative to the transmission elements (81, 82). Device for pressing off a book block (1, 1 ') which has a rounded back (2, 2') and a longitudinal axis (3) running along the back (2, 2 '), Having a tensioning device (40), comprising two clamping jaws (41) which can be fixed in a clamping position relative to a stationary frame (70) for clamping the book block (1, 1 ') in a region (4) which is near the back, wherein the book block (1, 1 ') between the clamping jaws (41) with its back (2, 2') is aligned parallel to the longitudinal axis (3), With a pressing device (7) for vertically moving a compact (6) in the stationary frame (70) perpendicular to the longitudinal axis (3) against the spine (2, 2 '), the compact (6) being parallel to the longitudinal axis (3) the back (2, 2 ') aligned and following a continuously preselectable trajectory, which is in a plane perpendicular to the longitudinal axis (3) plane, approximately parallel to the rounded back (2, 2') movably received in the pressing device (7) , Apparatus according to claim 14, characterized in that the compact has a flat pressing surface. Apparatus according to claim 14, characterized in that the pressing body (6) has a convex pressing surface (8) and in particular is designed as a partial or solid cylinder. Device according to one of claims 14 to 16, characterized in that the pressing device (7) by means of a first actuator (53) variable transmission (10, 10 '). Apparatus according to claim 17, characterized in that the transmission (10, 10 ') together with the pressing body (6) arranged in the pressing device (7) and the pressing device (7) is mounted vertically displaceable in the stationary frame (70). Device according to one of claims 17 or 18, characterized in that the transmission (10, 10 ') has two by the first actuator (53) in the horizontal direction of movement (25) and symmetrically adjustable transmission elements (11, 12, 81, 82) , Apparatus according to claim 19, characterized in that the transmission (10) has an inner and an outer, in particular designed as a horizontally displaceable carriage gear member (21), wherein the inner gear member (11) along the longitudinal axis (3) of the back (2, 2 ') seen at least partially within the outer gear member (21) is arranged, and that each transmission element (11, 21) on in the direction of the longitudinal axis (3) opposite sides each having at least one groove curve (12, 13, 22, 23), in which the pressing body (6) by means of a crossbar (30) can be coupled, so that the pressing body (6) parallel to the back (2, 2 ') is movable. Apparatus according to claim 19, characterized in that the transmission elements (81, 82) of the transmission (10 ') are each formed with at least one pivot point (87, 88) and are movable horizontally toward or away from each other, wherein in the pivot points (87 , 88) each having a crank lever (85, 86) is rotatably mounted and wherein in the crank lever (85, 86) parallel to the longitudinal axis (3) of the back (2, 2 ') aligned, with the pressing body (6) connected Traverse ( 30) can be coupled. Device according to one of claims 20 or 21, characterized in that the traverse (30) and the pressing body (6) are made in one piece. Device according to one of claims 20 or 21, characterized in that the pressing body (6) has an axis (19) and in each case at both end sides about its axis (19) rotatably mounted in the crossmember (30). Device according to one of claims 20 to 23, characterized in that the traverse (30) at least from both sides of the compact (6) the pressing body (6) overlapping plates (33) and the respective plate (33) in the axial direction of the compact (6 ) seen on both sides of the compact (6) outside the center of the compact (6) each have at least two pivot points (31, 32), in each of which either one in each of the Nutkurven (12, 13, 22, 23) guided rocker arm (35 , 36) or one of the crank levers (85, 86) is movably received. Apparatus according to claim 24, characterized in that the rocker arm (35, 36) is designed as a roller plate with rollers (37) which engage in the Nutkurven (12, 13, 22, 23). Device according to one of claims 17 to 25, characterized in that a drive is provided as the first actuator (53) which is formed by means of a single horizontal, in particular designed as a spindle actuator (50) on the transmission (10, 10 ') , Device according to one of claims 14 to 26, characterized in that the pressing body (6) via a swing mechanism (60) for pressing the back (2, 2 ') along the movement path is drivable. Device according to one of claims 19 to 27, characterized in that between the pressing device (7) and the frame (70) an overload unit (72) is coupled. Apparatus according to claim 28, characterized in that the overload unit (72) has a spring assembly (77) which in both horizontal directions parallel to the direction of movement (25) on the pressing device (7) is designed to be operative. Book production line with a device according to one of claims 14 to 29.

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