DE102005007745A1 - Folding device for use in printing machine, has brake device, which is arranged in folding board to decelerate movement of printed sheet or copies in area of folding board - Google Patents

Abstract

The device has a folding board (13) positioned in a pocket folding unit that is viewed downstream in a transport direction of a printed sheet or copies to form a longitudinal folding that runs parallel to the direction of the printed sheet or copies. A brake device (22) is arranged in the folding board to decelerate the movement of the printed sheet or copies in the area of the folding board.

Description

The The invention relates to a folding apparatus for a printing press after Preamble of claim 1.

folders are used to form folds on a substrate, namely the Forming of so-called transverse folds and Längsfalzen, wherein the Querfalze transverse to the transport direction of the printing material through the folder and the longitudinal folds parallel to the transport direction of the substrate through the folder be introduced into the substrate. From the state of the art are already known folders that a Taschenfalzeinheit and comprise a Falztisch downstream of the Taschenfalzeinheit downstream. The pocket folding unit comprises at least one pocket folder, wherein in the area of the pocket folder unit, transverse folds in the substrate be introduced. In the area of the folding table are longitudinal folds can be introduced into the substrate pre-folded with transverse folds. at The printing material can be printed sheets or a web-shaped printing material separate copies act.

to Forming the longitudinal folds In the area of the folding table, the substrate which has been pre-folded with transverse folds is produced supplied to the folding table and aligned with a stop, in which case one in the transport direction front section of the substrate at the stop to Plant comes. The substrate meets with in the transport direction forward section at full speed on the stop, so that it rebounds from the stop and then to exact orientation to be moved back towards the stop got to. Not only is time lost, but there is more the risk of the substrate hitting the stop tear and thus damaged. This is disadvantageous overall.

Of these, Based on the present invention, the problem is based a novel folder for to create a printing press.

This Problem is solved by a folding apparatus for a printing press according to claim 1 solved. According to the invention Folding table assigned at least one braking device to the movement decelerate the sheet or copies near the folding table.

in the For the purposes of the present invention, it is proposed in a Folder comprising a pocket folder and a pocket folder downstream folding table comprises, in the area of the folding table at least to arrange a braking device. With the braking device can the substrate, namely a sheet or a separated from a web-shaped substrate Copy, be braked so that the substrate with the in Transport direction forward section at reduced speed comes to the stop to the plant. This causes a rebound of the substrate avoided by the stop, allowing the orientation of the substrate total at the stop be carried out within a shorter period of time can. Furthermore, the risk of damage to the substrate avoided. The folding process is therefore improved overall.

preferred Further developments of the invention will become apparent from the dependent claims and the following description. An embodiment of the invention is without limitation to be closer to the drawing explained. Showing:

1 a schematic representation of a folding apparatus according to the invention for a web-fed rotary printing press;

2 : a detail of the folder of the 1 in the area of one of the longitudinal fold forming folding table in a schematic side view; and

3 : the detail of 2 in a schematic plan view;

4 : a possible embodiment of the folding table associated braking devices in a perspective side view.

Hereinafter, the present invention will be described with reference to FIG 1 to 4 described in more detail.

1 shows very schematically a folder 10 for a web-fed rotary press for folding a printing material in the direction of the arrow 11 is moved by the folder. In the illustrated embodiment, the folder has 10 via a pocket folding unit 12 and one of the pocket folding unit 12 downstream folding table 13 , The pocket folding unit 12 is a cutting unit 14 upstream. In the area of the cutting unit 14 are separated by a web-shaped substrate copies by transverse cutting transversely to the direction of movement of the printing material, the separated copies then to form transverse folds of Taschenfalzeinheit 12 and then to form Längsfalzen the folding table 13 be supplied. In the case in which sheet-shaped substrates are to be folded, it goes without saying that the cutting unit can be folded 14 be waived.

In the embodiment shown, as already mentioned, in the region of the cutting unit 14 from a web-shaped substrate copies separated. The copies separated from the printing material become first the pocket folding unit 12 supplied, which comprises at least one pocket folder. In the area of the pocket folding unit 12 At least one transverse fold is formed on a piece separated from the web-shaped printing substrate, which is therefore transverse to the transport direction of the item by the folding apparatus 10 is introduced into the same.

Following the introduction of the or each cross fold in the copies, they are the folding table 13 fed. According to 2 and 3 has the folding table 13 over conveyor belts 15 below a transportable copy 16 are arranged. In the embodiment shown act with the conveyor belts 15 so-called transport brushes 17 together, above the copy 16 run and the copy 16 on the conveyor belts 15 press it so that it is in the area of the folding table 13 in the direction of the arrow 18 can be transported. In place of the transport brushes 17 can also be at the top of the specimens 16 Conveyor belts are used.

The folding table 13 still has an attack 19 for a transport direction (arrow 18 ) front section of the folding table 13 to be folded copy 16 as well as a folding knife 20 , which is parallel to the transport direction 18 the copies 16 runs and therefore the formation of a longitudinal fold in the area of specimens 16 serves. To form a Längsfalzes is how 4 can be removed, the folding blade 20 in the sense of the arrow 21 moved down and takes this in the pocket folding unit 12 Pre-folded copy with cross-folds 16 under formation of a longitudinal fold with.

For the purposes of the present invention, it is now proposed to the folding table 13 at least one braking device 22 assigned. Using the braking devices 22 may be the movement of the specimen to be folded 16 in the area of the folding table 13 be slowed down so as to prevent the copy 16 at full speed at the stop 19 comes to the plant. Rather, the copy is 16 about the or each braking device 22 defined braked and defined aligned with the stop. Thereafter, directly by relative movement of the folding blade 20 in the sense of the arrow 21 the longitudinal fold on the copy 16 be formed.

In the preferred embodiment, there are two brake devices 22 present, with each side of the folding blade 20 in each case a braking device 22 in the immediate vicinity of the folding knife 20 is arranged. The braking devices 22 Accordingly, each run between the folding blade 20 and the conveyor belts 15 , wherein the braking devices 22 immediately adjacent to the folding blade 20 in the area of the stop 19 are positioned. The braking devices 22 close with the folding table 13 or the copy to be transported 16 an angle between 4 ° and 6 °. Preference is given to an angle of 5 ° between the print copy 16 and the braking devices 12 is included. This allows a gentle braking of printed copies 16 ,

The braking devices 22 are according to 4 preferably designed as a brake brush. Each of the brake brushes 22 is on a corresponding bracket 23 stored, being between the brackets 23 and the brake brushes 22 actuators 24 are arranged. About the actuators 24 can the brake brushes 22 relative to the copy 16 be adjusted (the employment can also be speed-dependent) so as the brake brushes 22 to slow down a copy 16 on the same to bring to the plant. On the brackets 23 grab bars 25 in accordance with 4 over a crossbar 26 are connected. About the bars 25 can both brake devices 22 together from the folding table 13 be moved away to z. B. auszuschleusen a missing sheet from the folder. For this purpose, then the stop 19 moved, with the stop 19 in 4 not shown.

in the Accordingly, the present invention is a folding apparatus proposed, at least from a pocket folding unit for training of transverse rabbets and a folding table downstream thereof Training of longitudinal folds serves. In such a folder is at least in the area of the folding table integrated a braking device. About the or each braking device can be provided in the area of the folding table with a longitudinal fold copy be aligned defined on a stop of the folding table. As a result, the entire folding process can be improved.

10

folding

11

arrow

12

Taschenfalzeinheit

13

folding table

14

cutting unit

15

conveyor belt

16

copy

17

transport brush

18

arrow

19

attack

20

folding blade

21

arrow

22

braking means

23

bracket

24

actuator

25

pole

26

traverse

Claims (6)

Folding apparatus for a printing press, for the formation of folds on printed sheets or on copies separated from a web-shaped printing substrate, with a pocket folding unit comprising at least one pocket folder (US Pat. 12 ) in order to form at least one transversely extending transversely to the transport direction of the transverse fold to the sheet or to the separated from the sheet-like substrate, and with a transport direction in the sheet or copies seen downstream of the Taschenfalzeinheit ( 12 ) positioned folding table ( 13 ) in order to form at the pre-folded with the or each transverse fold sheet or copy each a parallel to the transport direction thereof extending longitudinal fold, characterized in that the folding table ( 13 ) at least one braking device ( 22 ) is assigned to the movement of the printed sheets or copies in the area of the folding table ( 13 ) decelerate. Folding apparatus according to claim 1, characterized in that the folding table ( 13 ) a stop ( 19 ) for aligning the sheet to be folded or copies on a front in the transport direction of the same lying section that the folding table ( 13 ) continue to be a parallel to the transport direction of the sheets or copies extending folding blade ( 20 ) for forming the Längsfalzes on the sheet or copies, wherein the or each braking device ( 22 ) in the area of the attack ( 19 ) adjacent to the folding blade ( 20 ) is positioned. Folding apparatus according to claim 2, characterized in that in the region of the stop ( 19 ) directly on both sides of the folding blade ( 20 ) each a braking device ( 22 ) is positioned. Folding apparatus according to one or more of claims 1 to 3, characterized in that the folding table ( 13 ) for transporting the sheets to be folded or copies at the bottom of the sheets or copies running conveyor belts ( 15 ), which are provided with bands or brushes running on the upper side of the printed sheets or copies ( 17 ) interact. Folding apparatus according to claim 4, characterized in that the braking devices ( 22 ) in each case between the folding blade ( 20 ) and the conveyor belts ( 15 ) in the immediate vicinity of the folding blade ( 20 ) are positioned. Folding apparatus according to one or more of claims 1 to 5, characterized in that the or each braking device ( 22 ) is designed as a brake brush, each with the folding table ( 13 ) or to be folded sheet or copy an angle between 4 ° and 6 °.