JPH05246002A - Drive for rotary sheet fed printing presses - Google Patents

Abstract

PURPOSE: To facilitate changing between one side printing and both sides printing, phase changing, and increasing the number of printing units by designing in such a manner that each printing unit has a separate gear train decoupled from the preceding or subsequent printing unit, and each gear train is engaged via an intermediate gear with an impression cylinder or drum gear so that torque is equally distributed over each printing unit. CONSTITUTION: Each printing unit 1 to 6 is a separate compact gear train that is engaged with the preceding or subsequent printing unit via an intermediate gear. A drive transfer device 10, which is branched from a drive shaft 9 of each printing unit, is engaged with an intermediate gear 15 at the unit 1 and is engaged directly with a transfer or turning drum gear 13 of the separate compact gear train at the subsequent units 2 to 6. The separate compact gear train, which is decoupled from the preceding or subsequent printing unit, is composed from the gear 13, the intermediate gears 15 to 17, and an impression cylinder 12. When the turning drum is used instead of the transfer drum, an E-clutch 11 is used, and when to change from one side printing to both sides printing, the shaft 9 is decoupled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive for a sheet-fed rotary printing press arranged in rows.

[0002]

2. Description of the Prior Art Drives for sheet-fed rotary printing presses arranged in series, in which the individual printing units are connected by a closed gear train, are known (for example from the German Patent No. 1). 2334177 and U.S. Pat. No. 2,115,975). Furthermore, it is also known that each printing unit has its own drive transmission device in the closed gear train (East German Patent Addition No. 1).
59862 specification). The disadvantage of a closed gear train is that the printing units cannot avoid affecting each other due to vibrations, errors and the like. The different drive moments cause in part the load of the drive elements to be significantly increased, which leads to premature wear of the drive device and poor print quality.
In double-sided printing, a complex solution is required to realize the phase shift when using a closed gear train (eg German Utility Model 8319431).

[0003]

The object of the present invention is therefore to avoid the disadvantages heretofore known.

[0004]

According to the invention, the object is solved by a drive unit for a sheet-fed rotary printing press according to the invention as defined in the characterizing part of claim 1.

[0005]

The drive according to the invention ensures a uniform torque distribution for the individual printing units.
In the case of a machine having a double-sided printing unit, an E / clutch is arranged in the drive shaft for each printing unit. By using a separate compact gear train and E-clutch in the drive shaft of each printing unit, the switch from single-sided printing to double-sided printing is greatly simplified. In order to cause a phase shift, a predetermined part of the drive shaft may be cut off. The number of printing units can be increased if they are the same size.
According to the building-unit principle, for example, a multicolor sheet-fed rotary printing machine with 10 printing units is obtained. Printing errors that can be caused by a closed printing unit can be detected quickly (direct error detection) and possible leaks can be reduced.

Assembly is facilitated by using a gear that is one size larger. When the bearing diameter is formed larger than the diameter of the cutting edge circle of the gear, it is unnecessary to pull out the gear when mounting the cylinder, for example.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The sheet-fed rotary printing press shown in FIGS. 1 and 2 comprises six printing units 1 to 6 in a column structure. Each printing unit has an impression cylinder, a blanket cylinder, a plate cylinder and a transfer drum, but a sheet turning drum can be used instead of this transfer drum. The cylinder and the journal of the transfer or turning drum carry gears and each printing unit uses an intermediate gear to form a separate compact gear train which is connected to the preceding or following printing unit. ing. The required drive power is supplied by a drive motor 7, which drives a connectable drive shaft 9 extending along the machine via a V-belt drive 8. A drive transmission device 10 for each printing unit branches off from the drive shaft 9. The drive transmission device 10 is directly connected to the intermediate gear 15 in the printing unit 1 and directly to a size of a compact gear train in the subsequent printing units 2 to 6. Is engaged with the transfer drum or turning drum gear 13. A separate compact gear train for each printing unit, which is decoupled from the preceding or following printing unit, has a transfer drum gear 13 of one size, intermediate gears 15 to 17 and It is formed by arranging an impression cylinder gear 12 of a size.

If a sheet turning drum is used instead of the transfer drum, an E-clutch 11 is arranged in the drive shaft 9 for each printing unit. In order to switch from single-sided printing to double-sided printing, it is only necessary to disconnect the drive shaft 9.

A synchronizing device 20 is arranged in the sheet transfer area between the transfer drum or the sheet turning drum and the impression cylinder. The synchronizing device 20 is composed of, for example, a prism body arranged on a transfer drum and rollers (catch fork principle) arranged on an impression cylinder or tooth ring segments which are engaged with each other.

A torque adjusting mechanism 19 is arranged in each printing unit, which torque adjusting mechanism 19 is preferably connected on the operating side to the respective impression cylinder. Thus, for example, a braking device formed by at least a gear pump can be used.

The sheet-fed rotary printing press shown in FIGS. 3 and 4 has a basic structure corresponding to that of the sheet-fed rotary press shown in FIGS. 1 and 2.

The drive transmission 10 is in each case directly connected to a double-size impression gear 14 in each printing unit. A separate compact gear train for each printing unit is formed in the illustrated embodiment by arranging double the size of impression cylinder gear 14, intermediate gears 15, 16 and single size transfer drum gear 13. . The synchronizing device 20 and the torque adjusting mechanism 19 are constructed in accordance with the embodiment shown in FIGS. 1 and 2.

In another embodiment (not shown), each drive transmission 10 is engaged with an intermediate gear 15, which is directly or via another intermediate gear 16 A separate compact gear train is formed for each printing unit together with an impression cylinder gear of a size or a transfer drum gear 13 of a size of one.

[Brief description of drawings]

FIG. 1 shows a sheet-fed rotary printing press having a separate compact gear train and a large number of printing units, each having an impression cylinder gear of a size and a drum gear of a size of 1 for each printing unit. FIG.

FIG. 2 is a plan view of FIG.

FIG. 3 shows a sheet-fed rotary printing press having a separate compact gear train and a large number of printing units, each having a double-sized impression cylinder gear and a single-sized drum gear for each printing unit. FIG.

FIG. 4 is a plan view of FIG.

[Explanation of symbols]

1, 2, 3, 4, 5, 6 Printing unit 7 Drive motor 8 V belt drive device 9 Drive shaft 10 Drive transmission device 11 E / Clutch 12,14 Pressure drum gear 13 Transfer drum or turning drum gear 15,16,17 , 18 Intermediate gear 19 Torque adjusting mechanism 20 Synchronizer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Harald Baier, Federal Republic of Germany Rothgau 3 Einsteinstrasse 8

Claims (3)

[Claims] 1. A drive unit for a sheet-fed rotary printing press arranged in rows, each print unit having a connectable drive shaft and drive transmission extending along the machine. Type, each printing unit (1,
2, 3, 4, 5, 6) has a separate compact gear train which can be decoupled from the preceding or following printing unit, this compact gear train being the intermediate gear train (1).
5, 16, 17, 18) by arranging a single size impression cylinder gear (12) and a single size transfer drum or turning drum gear (13) or It is formed by disposing an impression cylinder gear (14) of a size and a transfer drum or turning drum gear (13) of a size of one, and each drive transmission device (10) has an intermediate gear (1).
5) for sheet-fed rotary printing presses, characterized in that they are engaged directly or via separate impression gears (12, 14) of a compact gear train or transfer or turning drum gears (13) Drive. 2. The drive device according to claim 1, wherein a synchronizing device (20) is arranged in the sheet transfer range between the transfer drum or the turning drum and the impression cylinder. 3. Each printing unit (1, 2, 3,
2. The drive device according to claim 1, wherein a torque adjusting mechanism (19) is arranged on the 4,5, 6).