EP3482968A1 - Device and method for book production - Google Patents

Abstract

The invention relates to a device (1) and a method for pasting the spine (16) of book block (15), each having a material section (10, 10 ', 10 ") of a back-adhesive material (3), at least one of two spaced-apart entrainment elements (16). 21, 22) of a transfer device (5) of the device (1) has a first actuator (28), at least one cross cutter (4), a support table (6) and the transfer device (5) for the material sections (10, 10 ', 10 ") having adjustment unit (7) of the back adhesive device (1) has a second actuator (36). Both actuators (28, 36) are operatively connected to a common control unit (31) such that the adjustable entrainment element (21) and the adjustment unit (7) as a function of a change in length of a subsequent material section (10, 10 ', 10 ") relative to a previous Material section (10, 10 ', 10 ") transversely to the vertical center plane (14) of the conveyor (17) are adjustable.

Description

The invention relates to a device for pasting the back of between conveyor elements of a conveyor in a parallel to the back extending conveying direction individually successively transported book block, each having a material portion of a Hinterklebematerials, wherein a laterally fixed, vertical center plane of the conveyor centrally between the transport elements and centrally through the Book block runs. In addition, the invention relates to a corresponding method for pasting the back of book block and a book production line with a Hinterklebevorrichtung.

In this case, the Hinterklebevorrichtung a the Hinterklebematerial transverse to the vertical center plane of the conveyor providing feeder, a cross cutter for separating individual material sections of Hinterklebematerial, arranged downstream of the cross cutter support table for receiving a respective separated material portion and a transmission device with two transverse to the vertical center plane of the conveyor spaced from each other Driving elements for transferring a separated material portion of the support table on the back of a pasted to and already provided previously with adhesive book block. At least the cross cutter, the support table and the transfer device of the back adhesive device form a common adjustment unit, wherein both this adjustment and at least a first carrier element relative to a second carrier element of the transfer device are formed transversely to the vertical center plane of the conveyor adjustable.

To improve the flexibility of their respective backs, the book blocks transported to the back-fastening device are first heated on a heating section and then optionally rounded and pressed. Only then will be glued the back so processed and reinforced with appropriate Hinterklebematerialien. Especially thick, rounded books or books with a straight back require a large, lasting dimensional stability. For unfolded book blocks or books with high usage requirements, the back is then provided with additional backing material prior to capping and pasting. This strip-shaped reinforcing material is usually made of molton, gauze or tear-resistant paper. The gauze is an open-weave, adhesive-pervious material that is usually adhered to the back of the book block with a 10 - 25 mm overlap on both sides. For this purpose, the corresponding material sections are dimensioned correspondingly larger when separating from the backing material.

For book blocks or books with particularly high requirements, such as e.g. in the case of textbooks, a piece of material consisting of gauze is glued to the back of the book block with a supernatant between 15 and 36 mm before the capping and pasting. In Europe, the projection of the material section is fixed and is approx. 20 mm; this is kept as low as possible for cost reasons. For American textbooks, however, the supernatant of this material section is prescribed by the NASTA (National Association of Textbook Administrators) and is at about 36 mm. For standard books, the supernatant is also reduced as usual in the rest of the world for cost reasons.

In industrial book production, the backs of book blocks are pasted into book production lines in which successive book blocks are clamped at the same mutual distance, for example, between conveyor chains of a conveyor and transported in a conveying direction corresponding to the longitudinal direction of their back. The material portions of a backing material used for pasting, are placed on the back in successively arranged Hinterklebevorrichtungen, each consisting of a Beleimeinrichtung for the back of the book block and a supply and transfer device for the pasting used material portion, and then pressed together in a pressing station with a flexible pillow. Here, the processing device for combined pasting and capital is often referred to as capital station and the Hinterklebevorrichtung Begazen as Gazestation.

A Hinterklebevorrichtung and a method for pasting the back of transported in a direction parallel to the back conveying direction book block are from the EP1894739 A1 known. The back-adhesive device has a feed device with a cross-cutter separating a web of a back-adhesive material into material sections and a transfer device transporting the respective material section to the back of the book block to be pasted. In this case, the feeding device conveys the backing material under an upper knife of the cross cutter and places it on a downstream arranged support table until the respective desired length of the next material section is reached. After separation from the backing material, the transfer device takes over this material section, transports it in a pivoting movement transversely to the conveying direction of the book block and finally places it on the back of an associated, clamped between transport elements and previously glued book block. The transmission device has for this purpose designed as a suction plate driving element. A similar solution is from the EP2269835 A2 known, however, which has instead of the suction plate designed as a needle plate driving element.

Since the dimensions of the suction or needle plates are in principle immutable, they can only be adapted insufficiently to the existing due to different block thickness requirement different lengths of material sections. In addition, provided for rounded backs of book block material sections in their filing always only a line contact with the back, so that a material portion applied in this way can not optimally cling to the back of the book block. As a consequence, quality impairments can occur.

With the bookline Diamant MC of the applicant and the book production line BF 530 of Kolbus GmbH and Co. KG solutions were created which overcome these disadvantages. These systems each have a Hinterklebevorrichtung with a transmission device, the latter has over two transverse to the vertical center plane of the conveyor for the book block spaced driving elements for the material sections. In this case, one of the driving elements is adjustable by means of a manual adjustment relative to the other driving element transversely to the vertical center plane of the conveyor for the book block. In addition, the Hinterklebevorrichtung can also be adjusted by means of a servomotor transverse to the vertical center plane of the conveyor.

Is currently in such a Hinterklebevorrichtung a material section required, the length of which differs due to different thickness of the books to be produced and the book block or due to different country-specific requirements for the two-sided projection from the previous section of material, so initially there is a corresponding feed of Hinterklebematerials, so this with a length differing from the previous material section lies on the support table. After separating a material section with the required length of Hinterklebematerial the operator adjusted by means of manual adjustment, the first carrier element relative to the second carrier element transversely to the vertical center plane of the conveyor that the two driving elements can take the material portion of varying length in the region of the two-sided ends. In addition, the machine operator issues a control command to the servomotor. This adjusts the Hinterklebevorrichtung accordingly transversely to the vertical center plane of the conveyor and opposite to the previous adjustment of the first driving element, so that the material portion of another length is stored symmetrically on the back of the book block.

These adjustments require both a great experience of the machine operator as well as a previous calculation of the setting values. In addition, the Adjustment appropriate tools needed. Finally, the Hinterklebevorrichtung must be stopped to change to a section of material with a different length. The method for adjusting the Hinterklebevorrichtung is thus on the one hand relatively time consuming and on the other hand, due to the inclusion of experience of the machine operator correct positioning of the displaced components still not reliably guaranteed, so that in turn a time-consuming Nachkotrolle is required.

In the production of large quantities always the same books takes even a time-consuming changeover to a subsequent production order with a modified length of the material section, a relatively small proportion of the total production time. However, if books are to be produced in small or very small print runs or even as individual copies, such a time-consuming changeover is unacceptable.

Therefore, it was an object of the invention to provide an apparatus and a method by which the back-gluing of the backs of book blocks with variable length sections of material can be carried out more easily, quickly and safely.

This object is achieved in a Hinterklebevorrichtung according to the invention in that at least the first driving element of the transmission device a first actuator and the adjustment of Hinterklebevorrichtung have a second actuator, that the two actuators are operatively connected to a common control unit such that at least the first driving element and the adjustment are adjustable transversely to the vertical center plane of the conveyor by means of their respective actuator in response to a change in length of a subsequent material section relative to a previous material section.

With the common control unit for the actuator of the first driving element as well as for the actuator of the adjustment can be easily and therefore cost-effective way the changeover time when pasting the back of book block with material sections of variable length shortened and increases process reliability become. Depending on the combination of the two adjusting movements, the back-adhesive sections can also be applied symmetrically as well as asymmetrically, ie with any desired protrusion on both sides, on the back of the respective book block. In addition, automation of the positioning processes taking place in the back-fastening device with respect to the length of the material sections is thereby realized.

According to one embodiment of the device according to the invention, the adjusting unit is supported on a machine frame of the back-fastening device accommodating the second actuator. Thus, the adjustment can be adjusted in a simple manner.

According to a further embodiment of the device according to the invention, the transmission device has a pivoting lever pivotable about a pivot axis received in the adjusting unit. The pivot lever is connected to a transverse to the vertical center plane of the conveyor pivotable transport table, which has a support element for the second driving element. In the support element, at least one adjusting spindle connected to the actuator is mounted on which an adjusting nut connected to the first driving element is guided. With this design of the transmission device is a simple, inexpensive and reliable due to the use of known components adjustment of the first driving element over the second driving element guaranteed.

In a next embodiment of the device according to the invention, the entrainment elements are connected to a suction line. For a simple and cost-effective solution for acting on the driving elements is shown.

According to a further embodiment of the device according to the invention, the first entrainment element has a first adjustment path and the adjustment unit has a second adjustment path, in each case transversely to the vertical center plane of the conveyor device in which the second adjustment path corresponds in terms of amount to half the first adjustment path and wherein the adjustment unit has a second adjustment direction aligned opposite to a first adjustment direction of the first drive element. With such a Hinterklebevorrichtung successive Hinterklebeabschnitte with different lengths can be advantageous always stored symmetrically on the back of each book block. If, on the other hand, an asymmetrical storage of back-adhesive sections is to be produced, one or both of the adjustment paths can be changed accordingly, both in terms of the amount and with regard to the adjustment direction.

According to a next embodiment of the device according to the invention, the back-adhesive material consists of gauze. This indicates a suitable back-adhesive material.

The object is achieved in a method for pasting back of transport elements of a conveyor in a parallel to the back extending conveying direction individually successively transported book block solved in that the adjustment of the first driving element of the transfer device with a first actuator and the adjustment of the adjustment of Hinterklebevorrichtung with a second actuator in each case takes place in cooperation with a common control unit. Backing the backs of book blocks with variable length sections of material can be made easier, faster and safer with this method. In addition, an automation of taking place during the pasting with respect to the length of the material sections actuation processes is thus realized.

In one embodiment of the method according to the invention, the back-adhesive material forming the material section to be separated is fixed on a support table prior to removal and until it is taken over by the transfer device with its entrainment elements. As a result, a secure adoption of the material separated from the backing material material section is ensured by the transmission device.

According to a further embodiment of the inventive method, the adjustment of the first driving element on a first adjustment and the adjustment of the adjustment takes place on a second adjustment, wherein the adjustment is adjusted in a direction opposite to a first adjustment of the first driving element aligned second adjustment direction and wherein the adjustment the second adjustment is done only by half the amount of adjustment on the first adjustment. With such a method successive Hinterklebeabschnitte with different lengths can be advantageous always stored symmetrically on the back of each book block. If, on the other hand, an asymmetrical storage of back-adhesive sections is to be produced, one or both of the adjustment paths can be changed accordingly, both in terms of the amount and with regard to the adjustment direction.

According to a next embodiment of the method according to the invention, a gauze backing material is used. This indicates the use of a suitable backing material.

The object is also transported by a book production line with a conveying elements having conveyor elements, in the book block in a direction parallel to their back conveying direction one after the other between the transport elements, wherein a laterally fixed vertical center plane of the conveyor centrally between the transport elements and centrally through the book block runs, and solved with a Hinterklebevorrichtung according to one of claims 1 to 6.

Fig. 1

einen Querschnitt durch eine erfindungsgemässe Vorrichtung, mit einem zu hinterklebenden Buchblock und einem sich dazu über dessen Rücken anschmiegenden, aus Gaze bestehenden Materialabschnitt, wobei ein schwenkbarer Transporttisch mit einem strichpunktierten Halbkreisbogen in seiner Bewegbarkeit skizziert ist,

Fig. 2

eine Darstellung entsprechend Fig. 1, jedoch mit einem auf einem Buchblock gleicher Blockdicke aufliegenden, längeren Materialabschnitt,

Fig. 3

eine Darstellung entsprechend Fig. 1, jedoch mit einem auf einem Buchblock größerer Blockdicke aufliegenden, noch längeren Materialabschnitt,

Fig. 4

die Vorrichtung gemäß Fig. 3, mit in Aufnahmeposition geschwenkter Übertragungseinrichtung,

Fig. 5

eine Berechnungsskizze mit drei bezüglich der Mittelebene der sie transportierenden Fördereinrichtung fluchtend übereinander dargestellten Buchblocks gleicher Blockdicke, wobei über dem oben gezeigten Buchblock ein gerade dessen Rücken berührender und die Mitnahmeelemente seitlich leicht überragender Materialabschnitt mit einem beidseitigen Überstand dargestellt ist, und wobei der Materialabschnitt bei dem in der Mitte gezeigten Buchblock mit äquidistanten Mitnahmeelementen nach unten über dessen Rücken gezogen ist, sodass er sich an den Rücken anschmiegt und leicht von beiden Mitnahmeelementen abgezogen wird, und wobei beim unten gezeigten Buchblock die Anschmiegeposition eines längeren Materialabschnittes dargestellt ist,

Fig. 6

eine weitere Bewegungsskizze zur Verdeutlichung der Schwenkbewegung der Übertragungseinrichtung, vergleichbar mit den Figuren 1 und 2.

The invention will be described in more detail by means of exemplary embodiments and with reference to a calculation sketch. Showing:

Fig. 1

a cross section through a device according to the invention, with a book block to be backed and a to this over the back clinging, consisting of gauze material section, wherein a pivotable transport table is sketched with a dot-dashed semicircle in its mobility,

Fig. 2

a representation accordingly Fig. 1 but with a longer section of material lying on a book block of the same block thickness,

Fig. 3

a representation accordingly Fig. 1 but with an even longer section of material resting on a book block of greater block thickness,

Fig. 4

the device according to Fig. 3 with transfer device pivoted in the receiving position,

Fig. 5

a calculation sketch with three with respect to the median plane of the transporting conveyor conveying book block of the same block thickness, above the book block shown above a straight back touching and the driving elements laterally slightly protruding material portion is shown with a two-sided projection, and wherein the material portion at the in the center of the book block shown with equidistant entrainment is pulled down over the back so that it snuggles against the back and is easily deducted from two entrainment elements, and shown in the book block shown below, the Anschmiegeposition a longer section of material,

Fig. 6

a further movement sketch to illustrate the pivoting movement of the transmission device, comparable to the FIGS. 1 and 2 ,

Fig. 1 shows a cross section through a book production line in the region of a gauze station, not shown, as an example of an inventive Hinterklebevorrichtung 1 for pasting, ie Begazen in this case, the back 16 of book block 15. The book production line has a cooperating with the Hinterklebevorrichtung 1 conveyor 17 with two transport elements 18, 19 for transporting the book block 15 in a parallel to the back 16 extending conveying direction BT. In this case, a laterally fixed, vertical center plane 14 of the conveyor 17 extends centrally between the transport elements 18, 19 and centrally through the book block 15th

The Hinterklebevorrichtung 1 has a feed device 2 for an existing gauze Hinterklebematerial 3 and a cross cutter 4 with an upper blade 8 and a lower blade 9 for successive separation of individual material sections 10 from Hinterklebematerial 3. Downstream of the cross cutter 4 is a support table 6 for receiving a respective material section 10 arranged. Furthermore, the back-adhesive device 1 has a transfer device 5 for transferring in each case one separated material section 10 located on the support element 6 onto the back 16 of a waiting book block 15 to be pasted. The feeder 2, the cross cutter 4, the support table 6 and the transfer device 5 of FIG Back adhesive device 1 form a common adjustment unit 7, which is supported on a machine frame 33 of the back adhesive device 1.

The transmission device 5 has two transverse to the vertical center plane 14 of the conveyor 17 spaced driving elements 21, 22, to each of which a suction line 37 is connected. The first driving element 21 is connected to a first actuator 28 and thus in response to a change in length of the material portion 10 transversely to the vertical center plane 14 of the conveyor 17, ie transversely to the conveying direction BT of the book block 15 adjustable. For this purpose, the transmission device 5 has a pivoting lever 11, which is pivotable about a pivot axis 13 accommodated in the adjusting unit 7 and which is connected to a transport table 20 pivotable transversely to the vertical center plane 14 of the conveyor 17. The transport table 20 has a fixed support element 30 for the second, thus also fixed entrainment element 22. In the support member 30 two associated with the first actuator 28 adjusting spindles 26 are mounted, on each of which a connected to the first driving element 21 first adjusting nut 27 is guided. The adjusting spindles 26 are connected to the first actuator 28 via a first actuating gear 29. The first actuator 28, the first actuating gear 29, the adjusting spindles 26 and the adjusting nut 27 form a first adjusting device 12 with a first adjustment 12 'for adjusting the distance of the first relative to the second driving element 21, 22. Of course, the first actuator 28 also directly to the Actuate spindles 26 attack.

The common adjustment unit 7 of the back adhesive device 1 can be adjusted transversely to the vertical center plane 14 of the conveyor 17 as a function of a change in length of a subsequent, compared to a previous material section 10 by means of a second, associated with this and the machine frame 33 actuator 36. For this purpose, the second actuator 36 is connected by means of a second adjusting gear 32 with two adjusting spindles 34, on each of which a fixed to the common adjusting unit 7 second adjusting nut 35 is arranged. The second actuator 36, the second actuating gear 32, the adjusting spindles 34 and the second adjusting nut 35 form a second adjusting device 25 with a second adjustment 25 'for adjusting the common adjustment 7 of Hinterklebevorrichtung 1. Of course, a Hinterklebevorrichtung 1 is conceivable in which the Feeding device 2 is not part of the adjustment 7, but the adjustment is then compensated by a corresponding, not shown drive the feeder 2.

The two actuators 28, 36 are operatively connected to a common control unit 31 such that at least the first driving element 21 and the adjusting unit 7 by means of their respective actuator 28, 36 in response to a change in length of a subsequent material section 10 relative to a previous material section 10 transverse to the vertical center plane 14th the conveyor 17 are adjustable.

During operation of the back-fastening device 1, it is supplied with a backing material 3 consisting of gauze from a storage device, not shown, in a conveying direction BT of the book block 15 that is perpendicular to the direction of view. The feeding device 2 pushes the band-shaped back-adhesive material 3 previously cut to the correct back length, for example, with the upper knife 8 of the cross cutter 4 in the upper position in the direction of the book block 15, in the upper position. The back-adhesive material 3 is transported so far that there is a required length of the later used for pasting an associated book block 15 material portion 10 downstream of the cross cutter 4 on the support table 6 is located.

For this purpose, the feed device 2, which is likewise connected to the control unit 31, is precisely specified to what extent the back-adhesive material 3 should be cut off. This measure is matched to the back 16 of an associated book block 15 and a predetermined two-sided projection Y of the intended material portion 10 relative to the back 16 of the pasted book block 15 and corresponds to a length A1 ... n of the later material section 10. The advanced Hinterklebematerial 3 is located now on the downstream of the lower blade 9 of the cross cutter 4 adjacent support table 6, which support table 6 is part of the module transverse to the vertical center plane 14 of the conveyor 17 displaceable adjusting unit 7.

Before the cross cutter 4 separates the material section 10 from the back adhesive material 3 by lowering the upper knife 8, the transport table 20 of the transfer device 5 is pivoted into a receiving position 23 and the intended material section 10 between the first, designed as a suction with a suction surface 21 'and adjustable driving element 21st , the second, also designed as a suction with a suction surface 22 'and fixed driving element 22 and the support table 6 clamped and therefore fixed on this. Then suck the two driving elements 21, 22, the advanced backing material 3 at. Finally, the material section 10 is separated by means of the cross cutter 4. Depending on the suction force of the entraining elements 21, 22, a clamping for fixing can be dispensed with.

Subsequently, the variable due to the adjustable driving element 21 in its width transport table 20 of the transfer device 5 transports the separated material portion 10 by means of a 180 ° pivoting movement into a dispensing position 24. The at any time to the support table 6 aligned transport table 20 reaches the receiving position 23 or the dispensing position 24 by a movement about the pivot axis 13 of the transmission device 5 (see also Fig. 4 and 6 ), regardless of its adjustability with the first or second actuator 12, 25.

In the conveying direction BT, ie along the line of sight FIG. 1 , successive, standing arranged book block 15 by means of the two opposite, circumferential and formed as chains transport elements 18, 19 of the conveyor 17 of the otherwise not shown book production line for Hinterklebevorrichtung 1 transported. The center of the book block 15 is thus aligned along the between the transport elements 18, 19 extending and laterally fixed, vertical center plane 14 of the conveyor 17. The block thickness of the in FIG. 1 shown book block 15 is denoted by D1. Symmetrically this is also a distance C1 of the placed next to the back 16, the material portion 10 holding down entrainment elements 21, 22 indicated. The distance between the vertical center plane 14 to the cutting edge of the cross cutter 4 is denoted by B1.

In order to better understand the movement, clarifies FIG. 6 the constructive connections. In FIG. 6 above is first shown how the existing of gauze backing material 3 is fixed by the located in the receiving position 23 of the transfer device 5 driving elements 21, 22 on the support table 6. The length of the subsequently separated with the cross cutter 4 material portion 10 is designated by A1. In addition, a reference point of the transmission device 5 form slightly to the right above the adjustable entrainment element 21 and the pivot axis 13 has a radius R for the pivoting movement of the transmission device 5. The distance B1 of the cross cutter 4 to the vertical center plane 14 of the conveyor 17 is equal to the sum of the double radius R and the half of the length A1 of the material section 10th

The width of the driving elements 21, 22 is in FIG. 6 each designated E. The distance C1 between the two driving elements 21, 22 accordingly corresponds to the difference between the length A1 of the material section 10 and the respective width E of the driving elements 21, 22.

In the dispensing position 24 of the transmission device 5, the transport table 20 places the material section 10 on the previously provided with glue back 16 of the Book block 15 and pivots back into the receiving position 23 back to take over the next material section 10 in the same way.

Fig. 2 shows a book block 15 with the same block thickness D1 as in Fig. 1 but with a gauze material section 10 'of A2 length, also manufactured in the NASTA standard, also in the dispensing position 24. The in FIG. 5 Following the calculation sketch shown, the length A2 corresponds to the original length A1 of the standard material section 10 plus twice a one-sided difference .DELTA.Y of the lateral projection Y 'of the NASTA standard manufactured material section 10' against the corresponding lateral projection Y of the standard material section 10th

The format conversion to the manufactured in the NASTA standard material section 10 'compared to that in the FIG. 1 shown material portion 10 via the two adjusting devices 12, 25, ie on the first adjustment path 12 'of the adjustable driving element 21 relative to the fixed driving element 22 and on the second adjustment 25' of the adjusting unit 7 with respect to the machine frame 33. First, the transmission device adjusted by means of the first actuator 28 of the first actuator 12 and by means of the second actuator 36 of the second actuator 25 with respect to the center plane 14 of the conveyor 17 of the book production line and thus to the center of the book block 15 to a new distance B2 to the center plane 14. The new distance B2 is different from the one in FIG. 1 and FIG. 6 entered distance B1 corresponding to the difference of the length A1 of the previous material section 10 (FIG. FIG. 1 ) to the length A2 of a new material section 10 '( FIG. 2 ). Thus, according to the invention, a new distance B1... N is set when a section of material having a different length A1... N is present.

On the other hand, the adjustable driving element 21 of the transport table 20 with the first adjusting device 12 to a corresponding distance C1 ... n and accordingly FIG. 2 set to a distance C2 to the fixed drive element 22. For this purpose, the first actuating device 12 to the trained as a servomotor first actuator 28, which is connected via the first actuating gear 29 with two parallel adjusting spindles 26. Other are the adjusting spindles 26 in which the second, fixed driving element 22 receiving support member 30 is mounted. Each adjusting spindle 26 also carries the first adjusting nut 27 connected to the adjustable driving element 21.

The distances B1... N, C1... N to be set with the two adjusting devices 12, 25 are determined according to FIG Fig. 5 as well as the Figures 2 and 6 calculated in the control unit 31 of the back adhesive device 1 and transmitted to the respective adjusting device 12, 25 ( Fig. 1 ). In addition, the control unit 31, the respective lateral projection Y, Y 'of the material portion 10, 10' communicate. For this purpose, the adjusting devices 12, 25 are given the difference 2x ΔY between a previous length of a standard material section 10 and a new, desired length of another, here a wider material section 10 '. All other format data, such as the block thickness D1 ... n etc. are available in the machine data.

In FIG. 5 a position of the transfer device 5 in the dispensing position 24 is shown above, in which the still extended, the supernatant Y having standard material portion 10 just touches the back 16 of the book block 15. The illustration below shows the end position of the pivoting movement of the transmission device 5. The material portion 10 with the original length A1 has nestled against the back 16 of the book block 15, which shortens its horizontal width. As a result, the material portion 10 on the suction surfaces 21 ', 22' of the driving elements 21, 22 so slightly shifted to the center that its liability to the respective driving element 21, 22 is maintained. Below is in FIG. 5 the situation for a book block 15 of the same block thickness D1 with a manufactured in the NASTA standard material portion 10 'and correspondingly larger projection Y' shown.

The length A1 of the material section 10 is calculated with the in FIG. 5 shown dimensions as follows: $$\mathrm{A}\mathrm{1}=\mathrm{D}\mathrm{1}+\mathrm{2}\times \mathrm{Y}+\mathrm{2}\times \mathrm{.DELTA.Y}$$

In the case of a standard material section 10, ΔY = 0.

mit ΔY als der einseitigen Differenz zwischen dem Überstand Y des Standard-Materialabschnitts 10 und dem grösseren Überstand Y' des im NASTA-Standard gefertigten Materialabschnitts 10'.Below is the case of the wider material section 10 'made in the NASTA standard, the length of which is calculated as follows: $$\mathrm{A}2=\mathrm{D}\mathrm{1}+\mathrm{2}\times \mathrm{Y}+\mathrm{2}\times \mathrm{.DELTA.Y}$$

with ΔY as the one-sided difference between the supernatant Y of the standard material portion 10 and the larger supernatant Y 'of the material portion 10' made in the NASTA standard.

The Fig. 3 shows a located in the transfer position 24 and manufactured in the NASTA standard material portion 10 ", which is provided for a book block 15 with a larger block thickness D3.

Fig. 4 shows you on the presentation in Fig. 3 following processing step in which the transfer device 5 has been pivoted again into the receiving position 23 to take over there after its separation from the backing material 3 a next material portion 10 "for a subsequent book block 15 with the same block thickness D3.

Fig. 5 illustrates the mathematical relationship already described above for two book block 15 equal block thickness D1 and a length A1 of the material section 10 according to standard, or a length A2 of the material section 10 'according to NASTA standard.

• Länge A1...n des aus Gaze bestehenden Materialabschnitts 10,
• Abstand B1...n des Querschneiders 4 zur Mitte 14 der Fördereinrichtung 17 bzw. zur Mitte des Buchblocks 15,
• Abstand C1...n des verstellbaren Mitnahmeelements 21 zum feststehenden Mitnahmeelement 22 und
• Blockdicke D1...n sowie
• Radius R der Schwenkbewegung der Übertragungseinrichtung 5
• Breite E der Mitnahmeelemente 21, 22.

Fig. 6 illustrates the mathematical relationship that corresponds in principle to the individual influencing variables indicated below and known to the control unit 31:

• Length A1 ... n of the gauze material section 10,
• Distance B1 ... n of the cross cutter 4 to the center 14 of the conveyor 17 or to the center of the book block 15,
• Distance C1 ... n of the adjustable driving element 21 to the fixed driving element 22 and
• Block thickness D1 ... n as well
• Radius R of the pivoting movement of the transmission device 5
• Width E of the driving elements 21, 22nd

und $$\mathrm{C}\mathrm{1}=\mathrm{A}\mathrm{1}-\mathrm{2}\times \mathrm{E}\mathrm{.}$$

This mathematical relationship is according to the inventive arrangement according to the illustrated embodiment: $$\mathrm{B}\mathrm{1}=\mathrm{2}\times \mathrm{R}+\mathrm{1}/\mathrm{2}\mathrm{A}$$

and $$\mathrm{C}\mathrm{1}=\mathrm{A}\mathrm{1}-\mathrm{2}\times \mathrm{e}\mathrm{,}$$

If the block thickness D 1... N and / or the production standard and thus the projection of the material section 10, 10 ', 10 "change in comparison to the previously produced book block 15, then the control unit 31 moves the setting devices 12, 25 in accordance with a movement coupling.

This technical solution is therefore particularly process-reliable because the material section 10, 10 ', 10 "does not have to be aligned .. After the installation of a new roll of the back-adhesive material 3, an initial cut is triggered at the touch of a button and the section of the back-bonding material 3 cut off manually or automatically is removed from the back-fastening device 1. After this initial cut, the front edge of the back-adhesive material is oriented straight along the conveying direction BT corresponding to the knife edge of the cross-cutter 4. An unillustrated stepper motor of the feed device 2 transports as much back-adhesive material 3 onto the support table 6 as the length A1. The transfer device 5 pivots to the support table 6 and sucks this back-adhesive material 3. Only then is the intended material section 10, 10 ', 10 "cut off. Thus, the trailing edge of the material section 10, 10 ', 10 "is also defined, thus defining its length A1. The position of the knife edge of the upper knife 8 of the cross cutter 4 is determined with reference to the center plane 14 of the conveyor 17, depending on the block thickness D1 the book block 15 and / or depending on the projection of the material portion 10, 10 ', 10 "adjusted.

To store with the back-adhesive device 1 by way of example successive Hinterklebeabschnitte 10, 10 ', 10 "with different length advantageously always symmetrically on the back 16 of the respective book block 15, the second displacement 25' by means of the control unit 31 in terms of amount chosen so that it half For this purpose, the adjustment unit 7 is adjusted in a second adjustment direction aligned opposite to a first adjustment direction of the first drive element 21. If, on the other hand, an asymmetrical storage of back-adhesion sections 10, 10 ', 10 "is to be generated, one or both can be generated Adjustment paths 12 ', 25' are changed accordingly, both in terms of the amount and in terms of adjustment.

Claims (11)

Device for pasting back the backs (16) of book blocks (15) transported one after the other between transport elements (18, 19) of a conveyor in a conveying direction (BT) running parallel to the backs (16), each with a material section (10, 10 ', 10 ") of a back-adhesive material (3), wherein a laterally fixed, vertical center plane (14) of the conveyor (17) extends centrally between the transport elements (18, 19) and centrally through the book blocks (15), wherein the back-adhesive device (1 ) having A feed device (2) providing the backing material (3) transversely to the vertical center plane (14) of the conveyor (17), A cross cutter (4) for separating individual material sections (10, 10 ', 10 ") from the back-adhesive material (3), A support table (6) arranged downstream of the cross cutter (4) for receiving a respective separated material section (10, 10 ', 10 "), • A transmission device (5) with two transverse to the vertical center plane (14) of the conveyor (17) spaced driving elements (21, 22) for transferring a separated material portion (10, 10 ', 10 ") from the support table (6) on the back (16) a book block (15) to be pasted and previously provided with adhesive, wherein at least the cross cutter (4), the support table (6) and the transfer device (5) of the back adhesive device (1) form a common adjustment unit (7) and wherein both this adjustment unit (7) and at least one first carrier element (21) with respect to a second carrier element (22) of the transmission device (5) transversely to the vertical center plane (14) of the conveyor (17) are adjustably formed, characterized in that at least the first driving element (21) of the transmission device (5) has a first actuator (28) and the Adjusting unit (7) of Hinterklebevorrichtung (1) have a second actuator (36), that the two actuators (28, 36) with a common control unit (31) are operatively connected such that at least the first driving element (21) and the Adjusting unit (7) by means of its respective actuator (28, 36) in response to a change in length of a subsequent material portion (10, 10 ', 10 ") relative to a previous material portion (10, 10', 10") transverse to the vertical center plane (14) Conveyor (17) are adjustable. Device according to claim 1, characterized in that the adjusting unit (7) is supported on a machine frame (33) of the back-fastening device (1) receiving the second actuator (36). Device according to claim 1 or 2, characterized in that the transmission device (5) has a pivoting lever (11), which is pivotable about a pivot axis (13) received in the adjusting unit (7) and which is pivotable transversely to the vertical center plane (14) of the conveying device (11). 17) pivotable transport table (20) is connected, that the transport table (20) has a support element (30) for the second driving element (22) that in the support element (30) at least one with the first actuator (28) connected adjusting spindle (26) is mounted, and that on the at least one adjusting spindle (26) with the first driving element (21) connected adjusting nut (27) is guided. Device according to one of claims 1 to 3, characterized in that the entrainment elements (21, 22) are connected to a suction line (37). Device according to one of claims 1 to 4, characterized in that the first entrainment element (21) has a first adjustment path (12 ') and the adjustment unit (7) has a second adjustment path (25'), in each case transversely to the vertical center plane (14) of the delivery device (17), wherein the second adjustment path (25 ') amounts to half the first adjustment path (12') and wherein the adjustment unit (7) has a direction opposite to a first adjustment direction of the first driving element (21) aligned second adjustment direction. Device according to one of claims 1 to 5, characterized in that the back-adhesive material (3) consists of gauze. Method for pasting back the backs (16) of book blocks (15) transported one after the other between transport elements (18, 19) of a conveyor in a conveying direction (BT) running parallel to the backs (16), each having a material section (10, 10 ', 10 ") of a backing material (3), wherein A laterally fixed vertical center plane (14) of the conveyor (17) runs centrally between the transport elements (18, 19) and centrally through the book blocks (15), The backing material (3) is provided across the vertical center plane (14) of the conveyor (17), • successively individual material sections (10, 10 ', 10 ") separated from the backing material (3) and each stored such a material section (10, 10', 10") in a transfer position, then from the transfer position of a transfer device (5) with two taken over transversely to the vertical center plane (14) of the conveyor (17) spaced driving elements (21, 22), transported in the direction of a book block to be pasted (15) and positioned on the previously provided with adhesive back (16), • at least the separation, storage, transfer and positioning in a common adjustment (7) takes place and When changing the length of a subsequent material section (10, 10 ', 10 ") relative to a previous material section (10, 10', 10") of the back-adhesive material (3) both the common adjustment unit (7) and at least one first entrainment element ( 21) relative to a second carrier element (22) of the transfer device (5) transversely to the vertical center plane (14) of the conveyor (17) are adjusted, characterized in that
the adjustment of the first carrier element (21) of the transmission device (5) with a first actuator (28) and the adjustment of the adjustment unit (7) of the back adhesive device (1) with a second actuator (36) in each case in cooperation with a common control unit (31) he follows. Method according to Claim 7, characterized in that the backing material (3) forming the material section (10, 10 ', 10 ") to be separated is separated by its transfer elements (21, 22) prior to removal and until taken over by the transfer device (5) Fixed support table (6). Method according to claim 7 or 8, characterized in that the adjustment of the first entrainment element (21) takes place on a first adjustment path (12 ') and the adjustment of the adjustment unit (7) on a second adjustment path (25'), wherein the adjustment unit (7 ) is adjusted in a direction opposite to a first adjustment direction of the first driving element (21) aligned second adjustment and wherein the adjustment on the second adjustment (25 ') only by half the amount of adjustment on the first adjustment (12') takes place. Method according to one of claims 7 to 9, characterized in that a backing material (3) made of gauze is used. Book production line with a transport element (18, 19) having conveyor (17), in the book block (15) in a parallel to their back (16) extending conveying direction (BT) one after the other between the transport elements (18, 19) of the conveyor (17) be transported, wherein a laterally fixed, vertical center plane (14) of the conveyor (17) centrally between the transport elements (18, 19) and centrally through the book block (15) extends, and with a Hinterklebevorrichtung (1) according to one of claims 1 to 6th

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