EP2468665B1 - Device for laying a cover - Google Patents

Description

The invention relates to a device for applying and aligning an envelope according to the preamble of claim 1.

State of the art

Perfect binders, used for the production of adhesive booklets or book blocks for hard covers, wherein the folded sheets and / or single sheets are combined to form a book block by applying an adhesive or glue on the previously processed block spine. The terms glue and adhesive are used synonymously below. The possible binding methods and the product variants depend on the machine equipment. This consists essentially of the functional units book block transport system, book block insertion station, back processing, back gluing, intermediate drying, side gluing, back reinforcement, put on envelope and press on, press envelope and dry.

The DE 20 2005 007 012 U1 shows such a perfect binder, also referred to as a bookbinding machine. This has a book block transport system consisting of around deflection wheels running conveyors and a plurality of in a same spaced apart therefrom attached thereto brackets for clamping sheet stacks. The staples transport the stacks of sheets and glued book blocks through the various processing stations.

In the production of hard-bound books, the binding of the envelope to the book block is accomplished by a turn-up applying and pressing station. About a Umschlagzuführstation a possibly provided by grooving with kinked edges envelope is first fed to the Umschlaganlegestation. Here, the envelope is lightly pressed against the provided at his book block back with adhesive book block and thereby fixed. In the subsequent envelope press station, the envelope becomes Pressed by a Rückenanpressplatte and by Seitenanpressschienen by applying force to the book block. This gives the perfect bound book its angular back shape. Depending on the grammage of the envelope, the adhesive used, and the speed of the machine, when the envelope is applied to the book block in the envelope applicator, the envelope may shift relative to the book block. In the envelope press station, the envelope is then falsely connected to the book block, resulting in books that do not meet the high quality requirements of adhesive bound booklets.

The DE 33 40 859 C2 shows a Umschlaganlege- and pressing device for a bookbinding machine. The device includes side pressure rails and a back pressure plate which are movable in synchronism with the book block transport system for carrying out horizontal movements or vertical movement for pressing the envelope against the book block. The Seitenanpressschienen have suction or clamping elements that hold a respective envelope until pressed against a respective book block back in the aligned position and thus prevent relative movement between the envelope and book block back. A disadvantage of this device is that the suction or clamping elements require a separate control for clocked operation of the suction or clamping elements with the movements of the pressing elements and the book block transport system. Another disadvantage is that the suction power of the suction elements must be adjusted depending on the surface structure of the envelope in order to ensure a sufficient suction force for fixing the envelope. Also, the cleaning and maintenance of the suction or clamping elements designed consuming. Other envelope application and -anpresseinrichtungen are from the EP 1 834 805 A2 which the preamble of claim 1 discloses, and the EP 2 020 305 A1 known.

From the DE 10 2008 059 079 A1 is a device for applying an isolated by a cover feeder envelope to a moving of a Bedruckstoffblocktransportsystem in a transport direction printing material block, in particular a book block, known which has a movable in a vertical direction pressing element. The pressing element has a substantially horizontal Andrückfläche, which can be formed by a pressure plate. Through this, the envelope is applied to the provided with still viscous adhesive substrate back. According to the invention, the pressing element has a needle-shaped element for fixing the envelopes, which protrudes from the pressing surface. The needle-shaped element may in particular be a needle with a small diameter in the region of its tip. The needle-shaped element dips into an envelope resting on the horizontal pressing surface, thereby fixing it in a form-fitting manner, thereby preventing the envelope from slipping during the application and before the setting of the adhesive. This solution according to the invention has the advantage that the needle-shaped element ensures the fixation of the envelope and thereby requires no complicated control or adjustment. The maintenance and cleaning of the needle-shaped element is easily possible. The problem is the dimensioning of the needle-shaped element for a variety of envelope materials.

task

The object of the present invention is therefore to provide a device for applying and aligning an envelope, which overcomes the disadvantages of the prior art.

This object is achieved by a device for applying an envelope with the characterizing features of claim 1.

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

An inventive embodiment of an apparatus for applying and aligning an envelope has a pressure table with a substantially horizontal pressing surface of a Umschlaganlege- and -anpressstation. The envelope is fed by a transport system to an envelope feed station of the envelope application and pressure station and provided with an adhesive layer

Substrate applied, which is moved by another transport system by the Umschlaganlege and -anpressstation in a transport direction, aligned and pressed pressed. The transport systems are powered by individual drives. The orientation of the envelope is effected by a driver, which is attached to the pressure table and protrudes beyond the pressure surface. The driver can either be firmly mounted on the pressure table, or mounted vertically and / or horizontally adjustable on the pressure table via a pneumatic cylinder.

In a preferred embodiment, the envelope feed station additionally comprises retaining elements. These are arranged fixed to the housing relative to the envelope transport movement. Advantageously, these retaining elements are designed as retaining springs or vacuum shoes or as drag springs and are variably adjustable in the pressure they exert on the envelope.

• keine aufwändige Ausrichtungsmechanik (nur fester Anschlag und Rückhaltefeder an Führungsschienen des Umschlaganlegers).
• leichte Einstellung und sehr gute Reproduzierbarkeit der Positionierung von Umschlag zu Buchblock über Steuerung bzw. Bedienoberfläche der Maschine.
• keine schwierige und teure zusätzliche Automation zum Abspeichern und Aufrufen von Voreinstellwerten über Auftragsverwaltung zum Minimieren der Rüstzeit.
• keine Anfälligkeit gegenüber Verschmutzung durch fest angebrachte Anschläge ohne integrierten Federweg.
• keine Anfälligkeit gegenüber Verschmutzung durch fest angebrachte Anschläge ohne integrierten Federweg.
• kein Verschleiß und kein Wartungsaufwand (berührungslose Ausrichtung zur Klammer)
• mechanische Toleranzen bei der Zuführung des Umschlages mittels Mitnehmerkette haben keine Auswirkungen auf die Genauigkeit

Advantages of the device according to the invention are:

• no complex alignment mechanism (only fixed stop and retaining spring on guide rails of the cover feeder).
• easy adjustment and very good reproducibility of the positioning from cover to book block via control or user interface of the machine.
• No difficult and expensive additional automation for saving and recalling preset values via order management to minimize set-up time.
• no susceptibility to contamination by fixed stops without integrated travel.
• no susceptibility to contamination by fixed stops without integrated travel.
• no wear and no maintenance (non-contact alignment to the bracket)
• mechanical tolerances in the supply of the envelope by means of driving chain have no effect on the accuracy

embodiment

Fig. 1

einen Klebebinder in einer Übersichtsdarstellung

Fig. 2

eine Anpressstation gemäß Stand der Technik

Fig. 3

eine Ansicht einer erfindungsgemäßen Umschlaganlege- und - anpressstation

Figuren 4 bis 9

zeigen erfindungsgemäße Ausgestaltungen des Mitnehmens und der Rückhaltevorrichtungen

The invention will be explained in more detail with reference to an embodiment. In a schematic representation:

Fig. 1

an adhesive binder in an overview

Fig. 2

a pressing station according to the prior art

Fig. 3

a view of a Umschlaganlege- - and-pressing station according to the invention

FIGS. 4 to 9

show inventive embodiments of takeaway and the restraint devices

Fig. 1 shows a section of an adhesive binder 1000 with a part of the associated book block transport system 33, which is formed by a non-illustrated, driven circulating chains with clips 1002 attached thereto. The drive of the circulating chain is formed for example by a servomotor, not shown.

Book blocks 100 are fed from the gathering machine 1010 in the direction of transport T to the perfect binder 1000. The book blocks 100 are grasped by staples 1002 and transported to a first processing station, a back processing station 1020. The spine processing station 1020 may have a plurality of processing tools, not shown. The processed at his back book block 100 is further transported to a glue application station 1030 and

provided with adhesive. In a subsequent Fälzelstation 1040 optionally a Fälzel can be applied. In an apparatus for applying and fixing the envelope 20.1, envelopes 101 fed from an envelope feeding station 1 are applied to the book blocks 100 and fixed and pressed in the press-fitting apparatus 20.2 and joined together. Subsequently, the book blocks 100 are further transported by a cooling section 1060 to a trimming station 3 (not shown in detail).

In FIG. 2 a device for pressing an envelope 20.2 of a Umschlaganlege- and -pressing station 2 according to the prior art is shown. One of collected signatures, z. Paper sheets, existing book block 100 is held in a book block clamp 1002 and clamped by the clamp 1002 in FIG Transport direction T along a straight line with substantially uniform speed promoted. Transport takes place through a book block transport system 33 (FIG. Fig. 1 ), which consists of a non-illustrated, circumferential chain on which the transport tongs 1002 are attached. The chain is driven by a servomotor, not shown.

At the machine position of the device for pressing an envelope 20.2, an envelope 101 is preferably pressed or pressed from below in the vertical direction (upward) to the block 100 and thereby connected to the back 42 of the block 100, preferably glued or glued. The back 42 and / or the envelope 101 is previously, d. H. in an upstream station of the perfect binder, with glue or glue, z. B. with hot melt adhesive or with cold glue, provided by applying.

The pressing of the envelope 101 is effected by a vertical movement 43 (up and down movement) of a frame 44 along the rails 45 of the device 20.2. The frame 44 carries a first pressing element (or pressure plate) 21, in particular an Anpresstisch 21. In this way, the necessary pressure for the connection of the envelope 101 and block 100 is generated.

In order to follow the transport movement of the block 100 during pressing, the pressure table 21 is mounted as a slide on a rail 46 of the frame 44 and movable or displaceable. The Anpresstisch 21 performs during pressing a horizontal movement 47 (forward and backward movement), which is parallel to the transport direction T and during the forward movement with uniform, the transport speed of the block 100 corresponding speed. The pressing is thus done during a synchronous phase between the transported block 100 and the moving pressure table 21st

Since the cover 101 is connected to the book block 100, except in the region of the back 42 also in the back near side portions of the book block 100, the application of the adhesive or glue (in the upstream station of the perfect binder) also takes place in these side areas.

The lateral pressing of the envelope 101 in the side regions is effected by a transverse movement 48 of at least one second pressing element 22, or a second and third pressing element 22, 23 (Aufeinanderzu- and Voneinanderwegbewegung), in particular from respective lateral pressure rails 22, 23 on each side of the device 20.2 or the book block 100. For this purpose, the contact pressure rails 22, 23 are mounted on respective rails 49 of the Anpresstischs 21 and movable or displaceable. The distance between the pressure rails 22, 23 to each other is initially greater by a desired amount than the block thickness (expansion of the book block 100 transverse to the transport direction T). This so-called "run-in width" (corresponds to the block thickness plus twice the lateral run-in distance between book block 100 and contact rail 22, 23) is kept essentially constant over a certain travel of the press table 21 (in a first phase of lateral pressing). Thereafter (in a second phase of the lateral pressing) move in synchronism with the book block 100 Anpressschienen 22, 23 move towards each other and press the envelope laterally.

As a result of the superimposition of the vertical movement 43 with the horizontal movement 47, the pressing table 21 performs a web movement 50. The web movement 50 is generated by a servomotor 58 in conjunction with a corresponding coupling mechanism 64 (FIG. Figures 2 and 4 ). Furthermore, the contact pressure rails 22, 23 perform respective counterrotating path movements 51 by the superimposition of the horizontal movement 47 with the transverse movement 48, wherein the path movements 51 are still superimposed with the path movement 50.

The generation of the contact pressure movement (transverse movement) of the respective pressure rails 22, 23 is preferably carried out by a respective, preferably fixedly arranged or frame-fixed (with respect to the frame of the device 20.2) drive unit 52 on each side of the device 20.2, ie each Anpressschiene 22, 23rd is preferably assigned its own drive unit 52.

The drive unit 52 comprises a preferably separately controllable servomotor 53, which drives a rotatable spindle 54 (eg via a toothed belt or other transmission means (not shown for the sake of clarity). The rotational movement of the spindle 54 initiated by the servomotor 53 is translated (via a spindle nut, not shown for the sake of clarity, inside a displaceable element 55) into a controllable transverse movement 48 of the displaceable element 55.

As an alternative to the described cost-effective drive unit 52 with servomotor 53 and linear unit of spindle 54 and displaceable element 55, a drive unit 52 with a linear servomotor can also be used.

On the displaceable element 55, a coupling rod 56 is articulated at its first, drive-side end, which transmits the transverse movement 48 from the drive unit 52 or from the displaceable element 55 to its associated pressure bar 22, 23. For this purpose, the coupling rod 56 is further articulated at its second, output-side end to its associated pressing bar 22, 23. The drive-side pivot point 57 of the coupling rod 56 is thus controlled in accordance with the controllable transverse movement 48 of the displaceable element 55 slidably. Preferably, the drive-side pivot point 57 is in the lateral direction (transversely to the transport direction T) outside the range of the horizontally moving (forward and backward movement) Anpresstischs 21st

Fig. 3 shows a Umschlaganlege- and-contact pressure station 2 according to the invention in an overview. The turn-up and press station 2 is located in an adhesive binder 1000 between an envelope feed station 1 (FIG. Fig. 1 ) and a subsequent cooling section 1060 and / or a trimming station 3 (shown only symbolically Fig. 1 ). In the upstream, not shown, stations of Klebebinders book block 100 were already processed, namely the book block back roughened and applied adhesive. By a Umschlagzuführstation at position 1 an envelope is separated and by a transport system 35 in the transport direction T to Envelope application and pressure station 2 moves. A book block 100 is also moved by a book block transport system 33, not shown, in the direction of transport T to the envelope application and pressure station 2 and therethrough. In the area of the illustrated envelope application and pressure station 2, an envelope 101 is first lightly pressed against a book block 100 and thus applied and then pressed firmly against the book block 100 with a pressing force. Therefore, the envelope application and - Anpressstation 2 has a device for applying and fixing 20.1 and a device for pressing 20.2.

Here, as already described, in the device for applying and fixing the envelope 20.1, the envelope is attached to the glued spine 42 of the book block 100 with the aid of a pressure table 28, which is also attached to the frame 44 of the device and thus performs the same web movement 50 applied and fixed by slight pressure. For this purpose, the pressure table 28 has a substantially horizontal pressure surface 24. For aligning the envelope 101, the pressure table has a driver 29, which protrudes beyond the pressure surface 24 on. Subsequently, the envelope 101, as already in the description of FIG. 2 executed, pressed in the device for pressing an envelope 20.2.

The FIG. 4 now shows the essential parts for the transport of the envelope from the Umschlagzuführstation 1 for Umschlaganlege- and -npress station 2. The Umschlagzuführstation 1 has a transport system 35. This transport system consists of circulating chains 60, which are driven by a servo motor 59 via sprockets 62, which are mounted on a drive shaft 61. The chains 60 are arranged laterally by a support plate 65. The envelopes 101 are transported by carriers 63, which are arranged on the chains 60, in the transport direction U to Umschlaganlege- and - Anpressstation 2. Here they rest on the support plate 65 and are guided right and left in Umschlagführungsschienen 31. By a delayed movement of the driver 63 before the time of acquisition of the device for applying and fixing an envelope 20.1 of Umschlaganlege- and -printer 2, the envelope 101 is slightly slowed down. To support this braking process retaining elements 30, 34, 36, 37 are provided, which during the braking process a Make sure contact of the trailing edge of the envelope 101 with the carriers 63 of the transport system 35 of the envelope feeder station 1. These retaining elements can be used, for example, as retaining springs 30 or as vacuum shoes 34 (FIG. FIGS. 6 . 7 ) or as drag springs 36, which are pressurized by pneumatic cylinder 37, be formed. In this case, the holding elements can be attached either to the guide rails 31 or the support plate 65. Alternatively, z. B. the drag spring 36 may also be attached to a housing-fixed holding device 66 and the pneumatic cylinder 37 to a housing-fixed holding device 67. Essential in the arrangement of the retaining elements is only that these retaining elements 30, 34, 36, 37 are arranged fixed to the housing relative to the envelope transport movement.

The embodiment with drag spring is intended primarily for holding down the envelope. This is to ensure that a curvature of the envelope does not lead prematurely to a contact with the glued book block. This could lead to the fact that the envelope can not be properly aligned with the driver and thus would result in a Umschlagversatz when pressed. Another important function is the retention of the envelope during the braking process on the carrier of the envelope feeder. For this purpose, retaining elements must be used, which must be adjustable at extreme properties of the envelope material. Remedy for this case, the small pneumatic cylinder, which can indirectly determine the intensity of the retention by the pressure on the drag spring.

After the immersion of the driver 63, the driver 29 of the pressure table 28 emerges behind the envelope 101 in order to guide it safely in the further course of the pressing movement. Due to the further accelerated movement of the linkage 64 of Umschlaganlege- and pressing station 2, the envelope 101 is taken from the driver 29 and aligned accurately.

After takeover and alignment of the pressing operation is performed by contact with the previously applied adhesive layer on the block back. During the entire Andrückphase the envelope to the book block through the pressure plate can the envelope can be guided safely. A "blurring" of the envelope can thus be prevented.

The invention combines the advantages of a mechanical solution with the technique for aligning the envelope by means of individual drives.

This is achieved with a very simple mechanical guidance of the envelope on the pressure table of the pressure station. Aiding means is a fixed guide stop ( Figures 3-6 ). This allows the envelope, with the help of the individual drives already used, to be aligned in a repeatable manner according to the transport clamp of the book block. Adjustments to other format settings can be made electronically and saved for repeat jobs. Due to the possible automation setup times can be minimized, the operation is simplified and the adjustment can be realized repeatable. The orientation to the transport clamp is non-contact and therefore subject to no fine adjustment, maintenance or wear.

The FIGS. 6 and 7 show inventive embodiments of the driver (29), and the retaining elements in the form of retaining springs 30 and / or in the form of a vacuum shoe 34th

Another embodiment ( FIGS. 7 and 8th ) could be instead of the fixed driver on Andruckisch also moving driver. The mobility in both horizontal and vertical motion can be useful. In our preferred application, the feed movement of the envelope must be precisely matched to the movement of the pressure table to allow the driver to appear both behind the envelope and to be able to safely align it in the further course by an accelerated movement.

A mitigation of the accuracy of these movements could bring vertically moving drivers that emerge position-controlled.

Even a horizontal movement can make sense. The background for such an embodiment is the envelope alignment with the aid of the carriers of the press table, independently or in addition to the accelerated movement of the press table.

LIST OF REFERENCE NUMBERS

1

Umschlagzuführstation

2

Envelope application and pressure station

3

Beschnittstation

20.1

Device for applying and fixing an envelope

20.2

Device for pressing an envelope

21

first contact element

22

second contact element

23

third contact element

24

horizontal pressure surface

28

Andrücktisch

29

takeaway

30

Retaining spring

31

Envelope guide rail

32

pneumatic cylinder

33

Book block transport system

34

vacuum shoe

35

transport system

36

drag spring

37

pneumatic cylinder

42

move

43

vertical movement

44

frame

45

rail

46

rail

47

Horizontal movement

48

transversal

49

rail

50

orbital motion

51

orbital motion

52

drive unit

53

servomotor

54

spindle

55

sliding element

56

coupling rod

57

fulcrum

58

servomotor

59

servomotor

60

Chain

61

drive shaft

62

Sprocket

63

takeaway

64

coupling gear

65

Support plate

66

housing-fixed holding device

67

housing-fixed holding device

100

book block

101

envelope

1000

Perfect binder

1002

Book block clamp

1010

Position gathering machine

1020

Spine preparation station

1030

glue application

1040

lining station

1060

cooling section

T

transport direction

U

transport direction

v

vertical driver movement

H

horizontal driver movement

Claims (9)

1. Device for laying and aligning a cover (101), fed by a transport system (35) of a cover feeder station (1), on a printing substrate block (100), provided with an adhesive coating, which is moved in a transport direction (T) by a book block transport system (33), with a pressing bench (28) which can be moved in a vertical and horizontal direction, with a substantially horizontal pressing surface (24) of a cover laying and pressing station, wherein the transport systems (33, 35) are driven by means of individual drives, characterised in that the pressing bench (28) is equipped with a driver lug (29) which projects beyond the pressing surface (24).
2. Device according to claim 1, characterised in that the driver lug (29) is mounted firmly on the pressing bench (28).
3. Device according to claim 1, characterised in that the driver lug (29) is vertically and / or horizontally adjustable by means of a pneumatic cylinder (32)
4. Combination of a cover feed station (1) and a device according to one of the preceding claims, characterised in that the cover feed station (1) has retaining elements (30, 34, 36), wherein the retaining elements are arranged fixed to the housing relative to the cover transport movement.
5. Combination according to claim 4, characterised in that the retaining elements are retaining springs (30).
6. Combination according to claim 4, characterised in that the retaining elements are vacuum shoes (34).
7. Combination according to claim 4, characterised in that the retaining elements are drag springs (36).
8. Combination according to claim 7, characterised in that pressure is applied to the drag springs (36) by means of pneumatic cylinders (37).
9. Combination according to one of the claims 4 to 8, characterised in that the retaining elements are variably adjustable in terms of pressure.

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