EP1132327B1 - Drive for a first and a second folding roller - Google Patents

Abstract

The drive for the rollers (22, 122) in the folding section of a web fed rotary printing press has a first driving gear (18) and a first driven gear (21) connected to the first roller (22) and a second driving gear (118) and a second driven gear (121) connected to the second roller (122). The individual rollers and their driving systems are contained in separate housings.

Description

The present invention relates to a drive for a first and a second folding roller, in particular in a folding apparatus of a web-fed rotary printing press according to the preamble of claim 1.

Such a drive is e.g. from US-A-1,985,917.

Furthermore, the present invention relates to a folding apparatus for a printing press according to the preamble of claim 6 and a method for driving a first and a second folding roller according to the preamble of claim 13.

Other drives are known from the publications EP-A-928 767 and DE 32 28 463.

Web-fed rotary printing machines print on a continuous web, e.g. made of paper. In a folder of a printing machine, the continuous web is then cut in a cutting in signatures and then folded.

One way to fold the signatures resulting from this process is to use a folding apparatus with a rotating knife; such a folder comprises a cylinder with rotating knives which fold the signature. The fold is generated in such a way that the signature is pressed by the rotating, or moving up and down folding blade in a gap between the two rotating folding rollers, wherein the two folding rollers take the signature along the fold produced by the folding blade, the Further educate fold and the folded product eg pass on to a paddle wheel arrangement. Each of the folding rollers must be driven.

As shown in Fig. 4, in a known folding apparatus of the prior art with a rotary folding blade, the cooperating folding roller driving means comprise the driving gears 1, 2 and the driven gears 3, 4. The two driving gears 1, 2 act in a gear ratio of 1: 1 together and each of the drive gears 1, 2 independently drives a respective output gear 3, 4, wherein the wheels 3, 4 are arranged coaxially with a respective folding roller. The gears 3, 4 and the folding rollers are about the center of the drive gears 1, 2 adjustable, as from the arrows 5, 6 is displayed, so that the gap between the folding rollers can be adjusted, for example, to allow the processing of printed products of different thickness. A seal or a housing 8, as shown schematically here, usually surrounds all four gears of the folder drive, ie, the two drive gears 1, 2 and the two output gears 3, 4. The seal 8 also serves to ensure the proper lubrication of the wheels. However, the seal 8 is subjected to a stress load at point 7 because the two gears 3, 4 must be moved during the adjustment of a gap between the folding rollers, which can lead to a break in the seal and / or a leak in the lubricating oil supply ,

It is an object of the present invention to provide an apparatus in the form of a drive and a method for improved sealing of the gears of a folder. An additional object of the invention is to provide a high quality folder.

These objects are achieved by the features of claim 1 and 13. Further embodiments of the present invention are contained in the dependent subclaims.

An inventive drive for a first folding roller and a second folding roller of two cooperating folding rollers, in particular in a folding apparatus in a web-fed rotary printing press, the drive a first drive gear, a first driven gear, which is driven by the first drive gear, and a second drive gear and a second driven gear driven by the second drive gear and adjustable apart from the first drive gear, is characterized by a first housing that seals the first drive gear and the first output gear and a second housing that seals the second drive gear and the second output gear ,

By means of the arrangement according to the invention with two seals or two individual housings, stretching or bending of the seal can be avoided even during the gap adjustment in which the first and the second driven gears are moved.

The first and second output gears are preferably arranged coaxially with their respective folding rollers.

The first and second drive gears are preferably connected by a first shaft and a second shaft to a first and second gear or drive wheel. The first and second gear are preferably in meshing engagement. At least one of the first and second gears may be connected to a drive motor.

The first and second shafts preferably penetrate a drive-side wall of the folder, with the drive gears within, i. on the inside of the drive side wall and the drive wheels outside, i. can be arranged on the outside of the drive-side wall.

The first housing is preferably connected to a Spaltinstellarm to be moved with the Spaltinstellarm, the Spaltinstellarm is in turn connected to one of the folding rollers.

The present invention also provides a folding machine for a printing press having a first folding roller and a second folding roller cooperating with the first folding roller for processing the signatures. The folder is characterized by a drive for the first folding roller and the second folding roller as described above.

The present invention also provides a method for driving a first folding roller and a second folding roller, wherein a drive comprises a first drive gear, a first output gear, a second drive gear and a second output gear, and wherein the distance of the first output gear to the second driven gear is adjustable , which is characterized by the sealing of the first drive gear and the first Output gear of the first folding roller by means of a first housing which seals the second drive gear and the second driven gear of the second folding roller by means of a second housing.

A preferred embodiment of the invention will be described below with reference to the drawings.

Fig. 1

eine Seitenansicht eines erfindungsgemäßen Falzapparatantriebs,

Fig. 2

eine Ansicht eines erfindungsgemäßen Falzapparatantriebs unter Hinzufügung von bestimmten Merkmalen zur Verdeutlichung entsprechend dem Querschnitt A-A der Fig. 1,

Fig. 3

eine schematische Ansicht entsprechend dem Querschnitt B-B der Fig. 1,

Fig. 4

einen bekannten Falzapparatantrieb nach dem Stand der Technik.

In the drawings show:

Fig. 1

a side view of a folder drive according to the invention,

Fig. 2

1 is a view of a folder drive according to the invention with the addition of certain features for clarification according to the cross section AA of FIG. 1,

Fig. 3

a schematic view corresponding to the cross section BB of Fig. 1,

Fig. 4

a known folding apparatus drive according to the prior art.

Fig. 1 shows a side view of a drive 10 for a folding apparatus 20 with a rotating knife, which comprises a folding roller 22. The drive 10 has a first gear 12, which can be driven by a motor, for example. However, it is also possible, instead of the first gear 12, to provide a first wheel 12, which can be driven, for example, by a motor via a belt or a chain. The first drive wheel 12 rotates a shaft 14 which is rotatably mounted by the bearings 32 in a drive-side frame 30 of the folder. The shaft 14 is held on the other side by the shielded bearings 16 which are secured in the extension 34 by means of an end plate 234 on the frame 30.

The shaft 14 rotates a drive gear 18 which is connected to a driven gear 21 which is connected to the folding roller 22 and coaxial with its shaft, e.g. in a gear arrangement, is engaged. The two folding rollers 22, 122 form a pull-in gap. The fold is formed with a folding blade, which presses the cut signature in the nip of the two folding rollers 22, 122.

Thus, the gear 12 drives the folding roller 22 by rotating the shaft 14, the driving gear 18 and the driven gear 21.

A Spaltinstellarm 40, which is adjustable by means of a Spaltinstelleinrichtung 42 is rotatably mounted by means of the bearing 36 on the outer side of the extension 34. An upper portion 41 of the Spaltinstellarms 40 is connected to a folding roller 22 by means of a bearing 44. The gap adjuster 42 can move the upper portion 41 about the extension 34 (e.g., into and out of the side as shown in Fig. 1) to move the roller 22 while the gears 21 and 18 are meshed.

A housing or cover 50 shields the drive gear 18 and the output gear 21. The cover 50 may e.g. be made of steel and is fixed on one side along or on the Spaltinstellarm 40 and on the other side 51 with a V-shaped seal shielding arranged around the folding roller 22. At the lower part of the seal 50, an oil drain 52 may be provided. The housing 50 can thus be moved with the Spaltinstellarm 40 and is not exposed by a gap adjustment of the roller 22 to a bending, stretching or tension.

Fig. 2 shows a view of the folder drive 10 according to the invention corresponding to the cross section AA of Figure 1, with some features are added for clarity of illustration. The Spaltinstellarm 40 can be rotated about the extension 34 and the bearing 36 through the gap adjustment 42. The upper end 41 of the Spaltinstellarms 40 moves as shown by the arrow 43 and can Folding roller 22 (shown schematically as a circle with a line) on the basis of the bearing 44 (FIG. 1).

A second folding roller 122 (also shown schematically) cooperates with the folding roller 22 in the folder and is driven by a second drive section 110 of the drive 10. The second drive section 110 has a shaft 114 which is held in the extension 134 of the drive-side frame 30. A bearing 136 allows the second folding roller to be moved in the direction 143 by means of a second gap adjusting arm 140.

The gap adjusting device 42 is connected to the drive side frame 30 (FIG. 1) by means of the bolts 61, 62 and includes a worm gear 63 which rotates a screw axis 64 by means of the gear 66. Depending on the direction of rotation of the screw axis 64, the guide members 65, 165 move toward or away from each other along the screw axis 64 by the screwing motion, i. the guide elements 65, 165, which may be under spring tension, have grooves in their interior, which cooperate with the screw axis 64. The guide members 65, 165 are respectively connected to the upper ends 41, 141 of the Spaltinstellarme 40, 140 and so can the Spaltinstellarme 40, 140 move around the extensions 34, 134. When the gap adjustment arm 40 is moved, the bearings 44 move the folding roller 22. Bearings for the folding roller 122 are also provided in the gap adjusting arm 140.

By turning the worm gear 63, the gap distance between the first folding roller 22 and the second folding roller 122, shown schematically in Fig. 2, can be adjusted.

Also for the sake of clarity, in Fig. 2, the end plates 234 and 334 are shown, which respectively connect to the extensions 34 and 134 and are connected by bolts to the frame 30, which for reasons of clarity in Fig. 2 is not shown.

Also for the sake of clarity, the gear 12 is shown, which is outside the frame 30 with a drive shaft 114 of a second drive wheel 112 is engaged.

FIG. 3 shows the second shaft 114 which drives a second drive gear 118, which in turn drives a second output gear 121. The second output gear 121 is disposed coaxially with the second folding roller 122 and drives them. Also shown in FIG. 3 are the shaft 14, the first drive gear 18, the first driven gear 21 and the first folding roller 22.

The housing 50 is shown schematically as it surrounds the gears 21 and 18 and is penetrated by a rotating folding roller 22 with sealing on a first side 51 (Fig. 1). The housing 50 may be sealingly connected to the gap adjustment arm 40 on the other side (FIG. 2). When the gap adjustment arm 40 is moved, the housing 50 also moves.

Similarly, a housing 150 seals the gears 121 and 118, is sealed by the rotating folding roller 122, and can move with the second gap adjusting arm 140 (Figure 2).

The two independent housings 50, 150 eliminate the stresses and eliminate potential problems with a leak in the lubricating oil supply to the wheels 18, 21, 118 and 121.

Fig. 4 shows a known folder drive described in the prior art reference in this document.

The bearings 44, 16 and 36 may be sealing bearings. Alternatively, the housing 50 may have a second side which is sealingly penetrated only by the shaft 14 and the opposite end of the roller 22.

LIST OF REFERENCE NUMBERS

1

drive gear

2

drive gear

3

output gear

4

output gear

5

movement direction

6

movement direction

7

Position of the housing 8

8th

Housing / sealing

10

drive

12

first gear

14

first wave

16

camp

18

first drive gear

20

Folder with a rotating knife

21

first output gear

22

first folding roller

30

drive-side frame

32

camp

34

renewal

36

camp

40

Spalteinstellarm

41

upper portion of the Spaltinstellarms 40th

42

gap adjustment

43

Arrow / direction

44

camp

50

first housing / cover

51

other side of the case

52

oil drain

61

bolt

62

bolt

63

worm gear

64

screw axis

65

guide element

66

gear

110

second drive section

112

second gear

114

second wave

118

second drive gear

121

second output gear

122

second folding roller

134

renewal

136

camp

140

second column adjustment arm

141

upper end of the gap adjustment arm 140

143

Arrow / direction

150

second housing

165

guide element

234

end disk

334

end disk

A-A

Section line

B-B

Section line

Claims (16)

1. Drive (10) for a first folding roller (22) and a second folding roller (122) of two interacting folding rollers (22, 122), in particular in a folder of a web-fed printing press, wherein the drive comprises a first drive gear (18), a first output gear (21), which is driven by the first drive gear (18), and also a second drive gear (118) and a second output gear (121) which is driven by the second drive gear (118) and is adjustable at a distance from the first output gear (21),
   characterised by
   a first housing (50), which seals the first drive gear (18) and the first output gear (21), and
   a second housing (150), which seals the second drive gear (118) and the second output gear (121).
2. Drive according to Claim 1, characterised in that the first output gear (21) is arranged coaxially to the first folding roller (22).
3. Drive according to Claim 1 or 2, characterised in that the drive (10) additionally comprises a first shaft (14), a second shaft (114), a first gear (12) and a second gear (112), wherein the first drive gear (18) and the second drive gear (118) are connected to the first and the second gear (12, 112) by means of the first shaft (14) and the second shaft (114).
4. Drive according to Claim 3, characterised in that the first gear (12) and the second gear (112) mesh.
5. Drive according to one of Claims 1 to 4, characterised in that the first folding roller (22) penetrates the first housing (50).
6. Folder for a printing press with
   a first folding roller (22),
   a second folding roller (122) interacting with the first folding roller (22) for processing signatures,
   characterised by a drive according to one of the preceding claims.
7. Folder according to Claim 6, characterised in that the folder additionally comprises a wall on the drive side, wherein the first drive gear (18) and the second drive gear (118) are arranged on the inside of the wall on the drive side.
8. Folder according to Claim 7, characterised in that the first gear (12) is arranged on the outside of the wall on the drive side, wherein the first shaft (14) is connected to the first drive gear (18) and the first gear (12) and is rotatably held in the wall on the drive side.
9. Folder according to one of Claims 6 to 8, characterised in that the folder additionally comprises a gap adjustment means (42) for adjusting a gap between the first folding roller (22) and the second folding roller (122).
10. Folder according to one of Claims 6 to 9, characterised in that the folder additionally comprises a gap adjustment arm (40), which is connected to the first folding roller (22) by means of a bearing (44).
11. Folder according to Claim 10, characterised in that the first housing (50) is connected to the gap adjustment arm (40).
12. Folder according to one of Claims 6 to 11, characterised in that the folder is a folder (20) with a rotating blade.
13. Method for driving a first folding roller (22) and a second folding roller (122), wherein a drive (10) comprises a first drive gear (18), a first output gear (21), a second drive gear (118) and a second output gear (121) and wherein the distance of the first output gear (21) to the second output gear (121) is adjustable,
    characterised by the following method steps:

    sealing of the first drive gear (18) and the first output gear (21) of the first folding roller (22) by means of a first housing (50);

    sealing of the second drive gear (118) and the second output gear (121) of the second folding roller (122) by means of a second housing (150).
14. Method according to Claim 13, characterised by
    adjusting a gap between the first folding roller (22) and the second folding roller (122).
15. Method according to Claim 13 or 14, characterised in that the first folding roller (22) is moved by means of a gap adjustment arm (40), wherein the first seal (50) is connected to the gap adjustment arm (40) and moves with the gap adjustment arm (40).
16. Web-fed printing press, characterised by a drive according to one of Claims 1 to 5 or a folder according to one of Claims 6 to 12.

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