EP1359010B1 - Adjustment of the diameter of a folding cylinder - Google Patents

Description

The invention relates to a drive for expansion segments for diameter adjustment on the folding cylinder of rotary printing machines according to the preamble of claim 1.

In web-fed rotary printing machines, a continuous material web, for example a paper web, is printed and cut into signatures in the cutting unit of a folding apparatus of the printing press and then folded.
One possible type of fold is the transverse fold which is perpendicular to the direction of movement of the signatures. The leading edge of the signature is held either before or after the cutting process by Punktumadeln or grippers on a folding cylinder, which is designed for example as folding blade. Subsequently, the signature is pushed along its center line by a folding blade arranged in the folding blade in a jaw or in folding rollers, so that a transverse fold is formed.
For cutting, folding and transporting signatures, it is often necessary that the effective outer diameter of the folding cylinder or Falzeserzylinders must be changed to allow accurate processing of signatures of different page numbers. The thickness of the signature can vary considerably depending on the desired end product. For this purpose, it is known to provide adjustable expansion segments on a folding cylinder or folding blade cylinder for changing the effective diameter of the folding cylinder or the folding blade cylinder.
An expansion segment refers to a portion of a cylinder that forms an outer portion of the cylinder and is adjustable to define the effective diameter of the cylinder.

From the DE 101 10 117 A1 For example, a folding cylinder with an adjustable expansion segment is known, which is arranged on a cylinder base between carriers, wherein the expansion segment forms the effective cylinder diameter. An adjusting device consisting of an eccentric designed camshaft on which the expansion segments are arranged, serves to adjust the expansion segments and thus to set the effective diameter.
From the DE 38 21 442 A1 Furthermore, a device for adjusting the diameter of a folding cylinder is known. In this device, the diameter adjustment is done automatically or via a hand crank, which initially drives a gear train and thereby-Gleitbasen adjusted and thus changed the diameter of the folding cylinder by engaging in bands. Further prior art is known from US 5,313,883 A1 known

It is the object of the invention to provide a drive for expansion segments for diameter adjustment of the folding cylinder, with which all arranged in the folding cylinder expansion segments can be adjusted simultaneously, which is insensitive to the resulting in the folder of the printing paper dust and optimum transfer of Drive torque to the expansion segments guaranteed.

The object is achieved with the features of independent claim 1.

The advantage of the solution according to the invention is that the drive of the eccentric screws by an endless drive means and / or adjusting means, for example a chain, a toothed belt or otherwise ausgestalteter belt drive, accomplished. The endless drive means and / or adjusting means is arranged on the folding cylinder such that it at least partially wraps around the drive wheels of the eccentric spindles. The drive wheels and tension rollers are configured according to the respective endless drive means used and / or adjusting means. Through the use of the endless drive means and / or adjusting means and the above arrangement, a constant transmission angle is achieved. It is significant that the drive by means of an endless drive means and / or adjusting means for the adjustment of the arranged on the eccentric spindle expansion segments is insensitive to contamination by paper dust. In addition, such a drive offers the advantage of easy cleaning.
The folding cylinder may be configured as a puncture needle cylinder or a Punktumadelfalzmesserzylinder a Querfalzapparates.

Other features and advantages will become apparent from the dependent claims in conjunction with the description.

Fig. 1:

eine Ansicht des Falzzylinders und

Fig. 2:

eine Seitenansicht des Falzzylinders nach Fig.1, bei dem zur besseren Darstellung nur ein Trägerelement gezeigt ist.

The invention will be explained in more detail below using an exemplary embodiment. In the drawings shows schematically and partially cut:

Fig. 1:

a view of the folding cylinder and

Fig. 2:

a side view of the folding cylinder after Fig.1 in which only one carrier element is shown for better illustration.

Fig. 1 shows a folding cylinder 1. At the folding cylinder 1 expansion segments 2 are arranged. Outer surfaces 3 of the expansion segments 2 form the effective diameter of the folding cylinder 1. The expansion segments 2 are mounted on an eccentric spindle 5 via support elements 4. The eccentric spindle 5 is, not shown in detail, arranged between carrier elements 6 on the folding cylinder 1. On the eccentric spindle 5, a drive wheel 7 is arranged on the end, for example on the drive side formed by the carrier element 6, (see FIG Fig. 2 ). Between the drive wheels 7 tension rollers 8 are arranged, wherein a tension roller 8 is connected to a transmission gear 9. The tension rollers 8 are preferably arranged stationary.
The folding cylinder 1 is mounted on a shaft 10. On the shaft 10, a central drive wheel 11 is rotatably mounted. The central drive wheel 11 is connected to the transmission gear 9 above an endless drive means 12 in connection. The drive wheels 7 and the tension rollers 8 are connected via a further endless drive means 13, referred to here as adjusting means 13 in connection. The drive wheels 7 and tension rollers 8 are at least partially looped by the adjusting means 13.
The central drive wheel 11 is, not shown in detail, connected to a drive. By selectively rotating the eccentric spindle 5, the position of this can be changed, so that the arranged on the eccentric spindle 5 supporting elements 4 are moved radially and thus allow a process of expansion segments 2 in the adjustment direction 14 to the inside or outside. In this way, the effective outer diameter of the folding cylinder 1 is adjustable.

reference numeral

1

folding cylinder

2

Expansion segment

3

outer surface

4

support elements

5

eccentric spindle

6

support element

7

drive wheel

8th

idler

9

transmission gear

10

wave

11

Central drive wheel

12

drive means

13

adjustment

14

adjustment

Claims (5)

1. A drive for expansion segments (2) for the diameter adjustment on the folding cylinder (1) of rotary printing presses, wherein the expansion segments (2) are arranged on driven eccentric spindles (5) between support elements (6), characterized in that on the eccentric spindles (5) drive wheels (7) are arranged, which are at least partially wrapped by a drivable endless adjusting means (13), in that the drive of the adjusting means (13) is effected via an endless drive means (12), in that the drive means (12) is arranged about a tension roller (8) and about a driven central drive wheel (11), wherein the central drive wheel (11) is arranged coaxially to the folding cylinder (1).
2. The drive according to Claim 1, characterized in that tension rollers (8) are arranged between the drive wheels (7), wherein the tension rollers (8) are at least partially wrapped by the adjusting means (13).
3. The drive according to Claim 1, characterized in that the tension roller (8) that is in connection with the drive means (12) is embodied with a transmission wheel (9).
4. The drive according to any one of the Claims 2 and 3, characterized in that the tension rollers (8) are arranged stationarily.
5. The drive according to any one of the preceding Claims, characterized in that the drive means (12) and the adjusting means (13) are embodied as chain or toothed belt.

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