JPS6144845Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a drive device for transmitting the rotation of a drive motor to a drive line shaft for driving the machine in a rotary printing press.

Generally speaking, as shown in Figs. 1 and 2, in a rotary printing press, each printing cylinder 2 supported by a machine frame 1 on a bed and other units are connected via a drive unit 3 made of gears or the like for each unit. It is driven using the line shaft 4 as a driving source. Furthermore, this line shaft 4 is driven by a motor 5, and power is transmitted by a V-belt 8 stretched between a motor pulley 6 and a driving pulley 7. However, in the conventional drive device, since the line shaft 4 with a high ground clearance is directly driven by the motor 5, the tension side tension of the V-belt 8 is set to F, and the center line of the V-belt 8 is applied to the base of the drive unit 3. If the acting distance to is l, then a rotational moment of F×l acts. When the tension of the V-belt 8 fluctuates due to pulley and belt characteristics, load fluctuations, etc., the frame 1 becomes deflected, and the entire machine vibrates, causing various problems. In particular, the lateral vibration of the printing cylinder 2 has been a major obstacle to the printing function.

This idea was created with these points in mind.
An intermediate pulley is provided below the line shaft, with the axis of the motor pulley on the same horizontal plane as the motor pulley.By transmitting the rotation of the motor to the line shaft via this intermediate pulley, vibrations of the machine caused by motor drive are eliminated. The present invention provides a drive device for a rotary printing press configured to eliminate various obstacles caused by this. The configuration and the like will be explained in detail below with reference to embodiments shown in the drawings.

The drive device according to the present invention is shown in FIGS. 3 and 4, with FIG. 3 being a plan view and FIG. 4 being a side view. In these figures, a line shaft 4 connected by a coupling ring 9 is installed in succession with the drive section 3 of each printing unit, as in the conventional case, and a driving pulley 7 is fixed on the line shaft 4. . Further, the motor 5 that drives the line shaft 4 is installed on the ground on a separate foundation from the main machine. An intermediate pulley shaft 11 is located below the line shaft 4 and approximately on the same horizontal plane as the motor pulley shaft 10 of the motor 5.
has been erected. This intermediate pulley shaft 11 is supported by a bearing 13 on a base 12 that is provided integrally with the bed on which the machine frame 1 is placed, and a packing 14 is provided between the bearing 13 and the base 12. is inserted. Two intermediate pulleys 15, large and small, are mounted on this intermediate pulley shaft 11.
and 16 are fixedly installed, a V-belt 8 is provided between the motor pulley 6 and the intermediate pulley 15, and a V-belt 17 is provided between the intermediate pulley 16 and the driving pulley 7.
are each strung up.

In the drive device configured as described above, the rotation of the motor 5 is transmitted to the driving pulley 7 via the intermediate pulleys 15 and 16, and drives the line shaft 4. In this case, the distance that the tension F of the V-belt 8 acts on the machine frame is the distance shown by l in FIG. 4, and the rotational moment is F×l'. In this embodiment, this number is approximately one third of the rotational moment F×l in the conventional device shown in FIG.

As is clear from the above explanation, in the present invention, in a rotary printing press in which each printing unit is connected and driven by a line shaft, the line shaft is placed on the same horizontal plane as the pulley shaft of the motor that drives the line shaft, and An intermediate pulley shaft is provided below the intermediate pulley shaft, the bearing of this intermediate pulley shaft is provided on a base installed on the floor, and the rotation of the motor is transmitted to the line shaft via this intermediate pulley. The belts between the belts are stretched approximately horizontally or vertically, and the tension acting between the motor pulley and the intermediate pulley no longer acts on the frame, so the rotational moment of these belt tensions relative to the machine frame is lower than before. becomes significantly smaller. Therefore, it is possible to completely eliminate the vibration of the entire machine and the problems caused by this, especially the problems with the printing function caused by the lateral vibrations of the printing cylinder, and the stability of the motor fixation is also improved. .

[Brief explanation of the drawing]

1 and 2 show a drive device of a conventional rotary printing press, FIG. 1 is a plan view thereof, FIG. 2 is a side view thereof, and FIGS. 3 and 4 are a rotary printing press according to the present invention. FIG. 3 is a plan view thereof, and FIG. 4 is a side view thereof. 4...Line shaft, 5...Motor, 6...
Motor pulley, 10...Motor pulley shaft, 11...
...Intermediate pulley shaft, 15, 16...Intermediate pulley.

Claims (1)

[Scope of utility model registration request] In a rotary printing press in which each printing unit is connected and driven by a line shaft 4, an intermediate pulley shaft 11 is located below the line shaft 4 and approximately on the same horizontal plane as the pulley shaft 10 of the motor 5 that drives the line shaft 4. and the motor 5
The rotation of the intermediate pulley 15 on this intermediate pulley shaft,
16, the drive of a rotary printing press is characterized in that a bearing 13 for pivotally supporting the intermediate pulley shaft 11 is provided on a base 12 installed on the floor. Device.