JP2003260785A - Rotary press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent driving of an annexed element provided incidentally to a printing unit of an extended part from being a factor of impeding a synchronous control of the printing unit. <P>SOLUTION: The printing unit 21 and the annexed element including a web path 23 at least which is needed incidentally to the printing unit 21 are provided as an extension of an existing rotary press 10, and the printing unit 21 and the annexed element are operated synchronously on the basis of a reference signal generated with the operation of the existing rotary press 10. In the rotary press thus constituted, a driving system 24 of the annexed element 23 is separated from a driving system 13 of the existing rotary press 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary printing press in which an existing rotary press is additionally provided with a printing unit and additional elements such as a web path necessary for the printing unit.

[0002]

2. Description of the Related Art FIG. 3 shows a rotary press in which an extension unit 20 is added to an existing rotary press 10 in order to cope with an increase in the number of pages of printed matter (for example, newspapers). Existing rotary press 10
Is configured to synchronously drive the plurality of printing units 11 and the folding machine 12 via the drive shaft 13. Note that power is transmitted to the drive shaft 13 from a plurality of motors 14. On the other hand, in this example, the additional unit 20 is provided with two printing units 21.

The printing unit 21 of the extension section 20 needs to be driven in synchronization with the operation of the existing rotary press 10. For this synchronous drive, the drive shaft 13 is attached to the extension unit 20.
Then, each printing unit 21 of the expansion section 20 may be driven by the power of the drive shaft 13. However, the work for extending the drive shaft 13 to the extension section 20 not only requires a great deal of labor and cost, but also makes it impossible to operate the existing rotary press 10 during the work. Therefore, as a sensor for detecting the rotation angle and the rotation speed of the drive shaft 13, for example, the pulse encoder 1
5, a master control unit 22 is provided in the extension unit 20, and the output of the encoder 15 is input to the master control unit 22 as a synchronization reference signal to synchronously drive the extension printing unit 21, that is, shaftless synchronization. Driving methods have been proposed.

[0004]

In FIG. 4, the characteristic a
Shows one form of time change of the number of output pulses of the encoder 15 per unit time (for example, 4 msec) (corresponding to the amount of angular change of the shaft 13 per unit time). As is apparent from the time-varying characteristic a, the output pulse number is affected by mechanical fluctuations of the existing rotary press 10, and an unnecessary frequency component is generated.

If the signal with such a change is used as it is as the synchronization reference signal of the extension unit 20, the master control unit 22 cannot smoothly perform the synchronized operation of the extension printing unit 21. Therefore, the master control unit 22 forms a synchronization reference signal having a waveform as shown by symbol b in FIG. 4 by passing the signal accompanied by the above-mentioned fluctuation through a filter for smoothing processing (for example, moving average processing), A command value for driving each of the motors 21a to 21d of the additional printing unit 21 is generated on the basis of the smoothed synchronization reference signal.

By the above smoothing processing, unnecessary frequency components included in the signal before the smoothing processing can be removed, but some frequency components (eg, ultra-low frequency components) included in the signal are smoothed. It will remain in the processed signal b. It is impossible to remove all unnecessary frequency components. Further, the more the complete removal is aimed at, the signal after the smoothing process will be greatly delayed as compared with the signal before the process, and as a result, there occurs an adverse effect that a cutting deviation occurs on the printing surface of the additional printing unit 21. come.

Since the above-mentioned frequency components that cannot be removed are applied to the command values for the respective motors 21a to 21d of the additional printing unit 21, depending on the level of the variation, the synchronous control of the additional printing unit 21 is adversely affected, and the printed matter. It causes quality deterioration (misregistration, etc.). Therefore, when the extension unit 20 is provided, the encoder 15 is attached to the existing rotary press 10 prior to the extension work, the level of the frequency component that cannot be removed by the smoothing process is measured, and the level is increased. It is determined whether or not the size is such that the synchronous control of the portion 20 is not hindered.

By the way, as shown in FIG. 5, a web path 16 (not shown in FIG. 3) provided in the existing rotary press 10 is provided with a belt 17 from a folder 12 of the existing rotary press 10. Power is transmitted. On the other hand, with the addition of the printing unit 21, the web path 23 (in FIG. 3, in FIG.
Although omitted), power is normally transmitted to the additional web path 23 from the web path 16 of the existing rotary press 10 via the belt 30.

Existing web path 1 via the belt 17
The driving of No. 6 is one of the causes of the above-mentioned frequency component that cannot be removed. Therefore, the additional web path 23 is added from the power transmission system of the existing rotary press 10 via the belt 30.
When the power is transmitted to, the level of the fluctuation component may be further increased. Further, the above-mentioned frequency fluctuation may be similarly deteriorated even when the additional web path 23 is driven by a driving method other than the belt (eg, shaft driving).
This means that even if it is determined that the level of the above-mentioned frequency component that cannot be removed and is measured prior to the expansion work of the expansion unit 20 is the “expansion possible level”, the expansion unit 20 including the expansion web 23 described above. Means that proper synchronization control of the expansion unit 20 is not completely guaranteed. Of course, when it is judged that the level of the unnecessary frequency component is the “non-expansion level”, it is unavoidable to abandon the provision of the expansion section 20.

In view of such a situation, it is an object of the present invention to provide a rotary printing press in which the drive of an accompanying element provided in association with the printing unit of the additional section does not become a factor that hinders the synchronous control of the printing unit. I am trying.

[0011]

The rotary press according to the present invention comprises:
A printing unit and an accompanying element including at least a web path necessary for the printing unit are added to the existing rotary press, and the added print unit is used as a reference signal generated in accordance with the operation of the existing rotary press. A rotary press that is synchronously driven based on the drive system of the auxiliary element is separated from the drive system of the existing rotary press.
According to the present invention, it is possible to prevent the driving of the auxiliary element from becoming a factor of worsening the frequency fluctuation of the reference signal.

The drive system for the accessory element may include a dedicated drive source for driving the accessory element. Further, the web path and the associated elements provided in the existing rotary press may be driven by a common drive source that is separated from the drive system of the existing rotary press. According to this configuration, not only the frequency fluctuation of the reference signal due to the driving of the associated element but also the frequency fluctuation of the reference signal due to the driving of the web path provided in the existing rotary press can be prevented. The attendant elements also include a dryer for drying the web and a cooler for cooling the web.

[0013]

1 and 2 are conceptual views of the essential portions of first and second embodiments of a rotary press according to the present invention. In these figures, the elements common to those shown in FIG. 5 are designated by the same reference numerals. That is, in each figure, the web path 16 is provided in the existing rotary press 10 shown in FIG. 3, and the web path 23 is shown in the figure, and the additional printing unit 21 of the additional section 20 shown in FIG.
It has been added to the.

First Embodiment In FIG. 1, the web path 16 of the existing rotary press 10 is driven by the power from the folding machine 12 provided via the belt 17 or other than the belt, as in the conventional case. It is driven by the power given from the folding machine 12 via the driving means (not shown). However, in the first embodiment, the additional web path 23 is independently driven by the dedicated motor 24.

According to the first embodiment, since the drive system of the additional web path 23 is completely separated from the drive system of the existing rotary press (the drive system including the drive shaft 13 of FIG. 1), the additional web path is provided. The operation of No. 23 has no influence on the drive system of the existing rotary press. This means that the addition of the web path 23 cannot be a factor that worsens the frequency fluctuation of the output of the encoder 15 shown in FIG.

However, in the technique according to the first embodiment, the encoder 1 according to the driving of the existing web path 16 is used.
Since it does not contribute to the reduction of the output fluctuation of No. 5, even if this technique is applied to the extension unit 20 shown in FIG. 3, proper synchronization control of the extension unit 20 is not always guaranteed. Therefore, the technique of the first embodiment is
It can be said that it is effective when applied to the case where the level of the non-removable variable component measured prior to the expansion work is the "expansion possible level" in order to determine whether the expansion of the expansion unit 20 is possible.

Second Embodiment As shown in FIG. 2, in the second embodiment, the web path 16 of the existing rotary press 10 is driven by the power of a motor 19 provided via a belt 18. Further, the web path 23 of the extension section 20 is driven by the power from the web path 16 provided via the belt 40. Since the motor 19 is provided along with the installation of the extension unit 20, it is completely separated from the drive system of the existing rotary press 10. Not only the belt driving but also the case where the existing web path 16 and the additional web path 23 are entirely driven by the motor 19 corresponds to this.

According to the second embodiment, the web path 16 and the additional web path 23 of the existing rotary press are both driven by the power of the motor 19, that is, these web paths 16 and 23 are existing rotary presses. Therefore, the operation of the web paths 16 and 23 has no influence on the drive system of the existing rotary press. This is because the addition of the web path 23 is the encoder 1
This means that not only the output fluctuation of No. 5 cannot be a cause of deterioration but also the existing web path 16 cannot be a cause of deterioration. Therefore, according to the second embodiment, even if the level of the variable component measured prior to the expansion work is the “expansion-impossible level”, the expansion unit 20 that guarantees proper synchronous control is provided. Can be provided.

Further, according to the second embodiment, since each of the web paths 16 and 23 is driven by the single motor 19, it is easy to determine the capacity of the motor. Moreover,
This motor 1 loaded with two web paths 16, 23
9 does not always operate in the regenerative mode (the mode in which it is rotated by the power supplied from the load side), so that it is not necessary to additionally provide a means for processing the regenerated electric power. Therefore, the drive system including the motor 19 can be simply configured.

It should be noted that in the above, the power of the motor 19 is supplied to the extension section 20 via the web path 16 of the existing rotary press 10.
Is transmitted to the web path 23 of the
May be transmitted to the web path 16 of the existing rotary press 10 via the web path 23 of the extension section 20.

In addition unit 3 in the third embodiment, in addition to the web path 23, a dryer for drying the web, a cooler for cooling the web (both not shown), and the like are also provided as a printing unit. It is provided as an accessory element of 21.

Since other accessory elements such as the dryer and the cooler have built-in rollers for conveying the web, when these rollers are driven by the power of the drive system of the existing rotary press, they are accompanied by the drive. There is a possibility that the frequency fluctuation amount of the output of the encoder 15 may be deteriorated. Therefore, in the third embodiment, the drive system of the accessory elements such as the dryer and the cooler also has a configuration according to the configuration of the drive system adopted in the first and second embodiments, that is, , The drive system separated from the drive system of the existing rotary press is adopted. The effect of the third embodiment is as follows.
Since it is the same as that of the first and second embodiments, the description thereof is omitted here.

[0023]

According to the present invention, since the drive system of the auxiliary elements including at least the web path, which is required in association with the addition of the printing unit, is separated from the drive system of the existing rotary printing press, it is added. The synchronous control of the printing unit is not disturbed by the driving of the above-mentioned auxiliary elements. Also,
If a configuration is adopted in which the web path provided on the existing rotary press and the above-mentioned associated elements are driven by a common drive source that is separated from the drive system of the existing rotary press, it is carried out prior to the expansion work of the expansion section. Even if the determination result of whether or not the expansion can be performed is “expansion not possible”, the expansion unit can be installed.

[Brief description of drawings]

FIG. 1 is a schematic view of a main part showing a first embodiment of a rotary press according to the present invention.

FIG. 2 is a schematic view of a main part showing a second embodiment of a rotary press according to the present invention.

FIG. 3 is a block diagram showing a schematic configuration of a rotary press provided with an extension unit.

FIG. 4 is a graph exemplifying a variation characteristic of the number of output pulses per unit time of the encoder and a characteristic when the variation characteristic is smoothed.

FIG. 5 is a schematic diagram showing a power transmission system path in the case where both the web path of the existing rotary press and the web path of the additional section are driven by the power from the folding machine.

[Explanation of symbols]

10 Existing rotary press 11 printing unit 12 folding machines 13 Drive shaft 15 pulse encoder 16 Existing Web Pass 17,18 belt 20 expansion section 21 printing unit 22 Master control section 23 Extension Web Pass 30,40 belt

Claims (4)

[Claims] 1. A printing unit and an auxiliary element including at least a web path necessary for the printing unit are added to an existing rotary press, and the added printing unit and the auxiliary element are added to the operation of the existing rotary press. A rotary press that operates synchronously on the basis of a reference signal that is generated, wherein the drive system of the accessory element is separated from the drive system of the existing rotary press. 2. The rotary press according to claim 1, wherein the drive system for the accessory element includes a dedicated drive source for driving the accessory element. 3. The web path and the accompanying element provided in the existing rotary press are configured to be driven by a common drive source separated from the drive system of the existing rotary press. The rotary press according to Item 1. 4. The rotary press according to claim 1, wherein the auxiliary elements include a dryer for drying the web and a cooler for cooling the web.