JP3406060B2 - Operating method of the switching type continuous printing press - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating a switching type continuous operation printing machine which switches a switching printing unit to perform continuous printing while a continuous printing sheet is running. It can be used when cleaning the blanket cylinder provided in the printing unit.

[0002]

BACKGROUND ART Generally, when performing commercial printing of leaflets such as newspaper insert advertisements, direct mails, catalogs, etc. by an offset rotary printing machine, usually the photographic process etc. is left as it is, and the shop name of the character spot, the date , Only the price etc. are replaced. Conventionally, in the case of performing such replacement printing, there has been adopted a method in which the offset rotary printing machine is once stopped, only the store name (sumi) plate is replaced, and the offset rotary printing machine is operated again.
On the other hand, the applicant of the present application proposes a switching-type continuous operation printing press capable of performing continuous printing while the continuous printing paper (web) is running without stopping the rotary offset printing press. (Japanese Patent Application No. 5-11290)
(See No. 3).

This switching type continuous operation printing machine is composed of a plurality of printing units, and at least two or more printing units among them are switched and used as a switching printing unit. Then, some of the switching printing units are selectively used to perform printing, the remaining printing units of the switching printing units are stopped, and then the continuous printing for printing is performed. While the paper is still running, the stopped switching printing unit is activated to bring it into a printing state, and by stopping the switching printing unit that is being used selectively, each switching printing unit is stopped. Is switched to perform continuous printing.

According to such a switching type continuous operation printing machine, the plate changing operation of the switching printing unit that is stopped is performed in advance, and the printing unit is switched to the switching printing unit that is in use. Since replacement printing can be performed while the continuous paper is running without stopping, printing efficiency can be improved and damaged paper (so-called spoilage)
Can be reduced.

In a rotary offset printing press including such a switching type continuous operation printing press, a blanket cylinder (blanket cylinder) for transferring ink from a plate cylinder provided with a printing plate to print on printing paper is provided. It is provided. In order to perform stable and high-quality printing, this blanket cylinder is usually appropriately washed by a blanket washing device during the printing operation of the offset rotary printing press. As such a blanket cleaning device, a cleaning liquid is sprayed onto the rotating blanket cylinder and a special cloth is pressed to automatically wipe the blanket dirt on the blanket cylinder, or a cleaning liquid is sprayed onto the blanket cylinder with a brush roll. There is also a method to clean the blanket.

[0006]

However, in the operation by the above-described switching type continuous operation printing machine, compared to the case of performing the replacement printing by the conventional offset rotary printing machine which is not the switching type continuous operation printing machine, the damaged paper is lost. However, when continuous printing is performed by switching the switching printing unit while the continuous paper is still running, there is no change to the loss of paper due to the switching operation. It has been desired to improve the printing efficiency by further reducing the waste paper. In addition, when the blanket cleaning is generally performed in the offset rotary printing machine including the above-mentioned switching type continuous operation printing machine, there is a problem that a waste paper is generated due to the blanket cleaning.

Further, when performing the blanket cleaning in the above-described switching type continuous operation printing machine, since there is a printing unit that is not used in the printing operation after the blanket cleaning (a printing unit for switching that is not selectively used), this printing unit is used. However, there is a problem that the cleaning liquid remains on the blanket, and particularly, the cleaning liquid remaining on the blanket of the blanket cylinder located above the continuous paper drops on the continuous paper during the printing operation to cause defective printing.

That is, in a normal offset rotary printing press, which is not a switching type continuous operation printing press, all the printing units operate, so that the cleaning liquid on the blanket of each printing unit after the blanket cleaning continues when the printing operation is resumed. If there is a printing unit that is completely absorbed on the paper, but is not used in the printing operation after the blanket cleaning, such as a switching continuous printing machine, the cleaning liquid will remain on the blanket of some printing units. There was a problem.

An object of the present invention is to provide an operating method of a switching type continuous operation printing press capable of reducing waste paper and improving printing efficiency. Further, another object of the present invention is, in addition to the above-mentioned object, the cleaning liquid on the blanket after cleaning can be more surely absorbed into the continuous paper, and the occurrence of printing defects can be prevented in advance. It is to provide a method of operating the machine.

[0010]

According to the present invention, a printing unit switching period and a blanket cleaning period of a switching type continuous operation printing machine (at least a period during which the cleaning operation itself is performed).
It is intended to achieve the above-mentioned object by matching with. Specifically, the present invention is a switching printing unit in which at least two or more printing units among a plurality of printing units are switched and selectively used, and a continuous printing paper is kept running. A method for operating a switching-type continuous operation printing machine that performs continuous printing by switching between these switching printing units, wherein each of the printing units has a plate cylinder provided with a printing plate above and below the continuous paper, A blanket cylinder that transfers ink from these plate cylinders to print on continuous paper, an ink supply device that supplies ink to each plate cylinder, a water supply device that supplies water to each plate cylinder, and the blanket cylinder. And a blanket cleaning mechanism portion of a blanket cleaning device for cleaning the blanket cylinder, which is provided in the vicinity of
The provided, the current continuous printing of the plurality of printing units
The printing unit used and the one currently used for continuous printing.
When switching to a printing unit that is not
The continuous paper is run in the print halt state and the switching is performed.
During the switching period of both printing units for printing, the blanket cleaning mechanism section of the blanket cleaning device causes the current continuous
The blanket of the printing unit used for printing
The feature is that the body is washed.

Here, it is preferable that the printing unit for performing the blanket cleaning is all the printing units (including the base printing) that were in the printing state before the switching among the plurality of printing units. In other cases, for example, when all printing units including switching and base printing are used, when all printing units used for printing operation after switching (including base printing) are used, some switching units are used. This includes cases where only the printing unit is used. The phrase "perform blanket cleaning during the printing unit switching period" means that at least the period during which the cleaning operation is performed falls within the printing unit switching period. It does not have to stay within the switching period.

Further, the operating method of the switching type continuously operative printing machine of the present invention is now continuous mark among the plurality of printing units
Printing unit used for printing and the one currently used for continuous printing.
When switching between unused printing units,
The printing unit in the printing state is decelerated from the normal printing speed to the blanket cleaning speed , and
The blanket cleaning is performed separately from the above, and the switching printing unit that becomes the printing state after switching among the switching printing units is accelerated from the stop state to the blanket cleaning speed and synchronized with other rotating printing units. After completion of the blanket cleaning, a printing unit used for printing operation after switching among the plurality of printing units is accelerated to a normal printing speed and is not used for printing operation after switching among the switching printing units. It is characterized in that the printing unit is stopped.

Furthermore, a method of operating switching type continuously operative printing machine of the present invention, the blanket cylinder of the not used in the printing operation after switching the printing unit of the printing unit before Symbol switching, after having reached the blanket cleaning rate Ink supply device and water supply for the blanket cleaning operation to be performed
State to being detached from the apparatus, the Bran
After the washing of the blanket is completed, the washing on the blanket
In order to absorb the cleaning liquid, once put it on the continuous paper and then put it out again, and then print after switching.
It is characterized by stopping the printing unit that is not used for operation .

[0014]

According to the present invention as described above, continuous printing is performed by switching the switching printing unit while the continuous printing paper is running, and concurrently with the switching operation of the switching printing unit. Clean the blanket.
For this reason, the broke generated by the switching operation of the switching type continuous operation printing machine and the broke generated by the blanket cleaning are superposed, so that the broke can be reduced as a whole, and the printing can be reduced. Efficiency is improved.

Further, if the blanket cleaning is performed by decelerating from the normal printing speed to the blanket cleaning speed, the continuous paper running in the non-printing state during the blanket cleaning is reduced by the low speed operation, thereby reducing the loss of paper. In addition, the blanket cleaning can be performed at the number of revolutions of the blanket cylinder suitable for cleaning, and the cleaning efficiency is improved.

Further, after the blanket cleaning is completed, if the blanket cylinder of the printing unit that is not used in the printing operation after the switching among the switching printing units is once attached to the continuous paper for printing and then released. Since the cleaning liquid on the blanket of the blanket cylinder of this printing unit is absorbed by the continuous paper, the inconvenience that the cleaning liquid remaining on the blanket after the printing operation is restarted causes printing failure is prevented. The purpose is achieved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an offset rotary printing press 10, which is a switching type continuous operation printing press of this embodiment. The offset rotary printing press 10 includes five printing units 11, 1.
2, 13, 14, 15 and a printing press main body 40 including a basic control device, an automatic switching control device 41 for switching control of the printing press main body 40, and a blanket cleaning device for performing blanket cleaning of each of the printing units 11-15. And 50.

Of the five printing units 11-15, FIG.
The two printing units 11 and 12 on the right side in the middle are switching printing units that are alternately switched and used, and the remaining three printing units 13, 14 and 15 on the left side in FIG.
Is a printing unit for base printing that is always used. A printing web (continuous paper) 16 is passed through each of the printing units 11 to 15.

Each of the printing units 11 to 15 has a main line shaft 32 and a sub line shaft 33.
1 and are collectively driven by a main motor 31 provided on the left side of the printing unit 15 in FIG. Further, on the right side (upstream side) of the offset rotary printing press 10 in FIG. 1, there is provided a feeding section 20 that feeds the web 16 before printing to the printing unit 11, and the left side of the offset rotary printing press 10 in FIG. 1 (downstream side). ) Is provided with a folder 21 that appropriately folds or cuts the web 16 printed and sent from the printing unit 15.

FIG. 2 shows the detailed construction of each of the printing units 11-15. Each printing unit 11-15
Plate cylinders 23U and 23L with printing plates above and below the web 16
And blanket cylinders 24U, 2 for printing on the web 16 by transferring ink from these plate cylinders 23U, 23L.
4L, an ink supply device 25 for supplying ink to each plate cylinder 23U, 23L, and a water supply device 26 for supplying water to each plate cylinder 23U, 23L. A blanket cleaning mechanism portion 51 of the blanket cleaning device 50 is provided near the right side of the blanket cylinders 24U and 24L in the figure.

Returning to FIG. 1, the automatic switching control device 41 is
This is a device for automatically performing switching control for performing continuous printing by switching the switching printing units 11, 12 while the web 16 is running, and of the printing units 11, 12 before and after switching. It always keeps track of which is being used. The automatic switching control device 41 uses, as a selection signal, information indicating which of the five printing units 11 to 15 has been used in the printing operation before the switching, that is, which printing unit is to be subjected to blanket cleaning. The output is output to the blanket cleaning control unit 52 of the blanket cleaning device 50. Then, this selection signal is sent to each of the five printing units 11 to 15
The blanket cylinders 24U and 24L above and below the blanket cylinders 24U and 24L are provided with information as to whether or not they are individually cleaned.

Further, the automatic switching control device 41 sends a cleaning start / end signal for instructing the start / end of the blanket cleaning, to the blanket cleaning control section 5 of the blanket cleaning device 50.
It is designed to output to 2.

The blanket cleaning device 50 is provided in the vicinity of each of the blanket cylinders 24U and 24L of each of the printing units 11 to 15 to clean the blanket cylinders 51 and 24L, and the blanket cleaning mechanism 51 has a predetermined structure. And a blanket cleaning control unit 52 that outputs a cleaning signal for performing the cleaning operation. This blanket cleaning device 50 is disclosed in Japanese Patent Application No. 5-5 by the applicant of the present application.
The structure is similar to the blanket cleaning device proposed in No. 0971.

The blanket cleaning mechanism section 51 performs a cleaning operation for cleaning the blanket cylinders 24U, 24L based on the cleaning signal sent from the blanket cleaning control section 52. For example, the blanket cylinder 24 in rotation.
U or 24L is sprayed with a cleaning solution and a special cloth is pressed to automatically wipe the blanket on the blanket cylinders 24U and 24L, or a cleaning solution is sprayed to clean the blanket on the blanket cylinders 24U and 24L with a brush roll. System, etc.

The blanket cleaning control unit 52 outputs the selection signal output from the automatic switching control device 41 and the cleaning start /
The cleaning operation of the blanket cleaning mechanism 51 is controlled based on the end signal. That is, when the blanket cleaning control unit 52 inputs the cleaning start signal from the automatic switching control device 41, the blanket cylinders 24 of the printing units 11 to 15 are based on the information obtained by the selection signal.
The automatic switching control device outputs the cleaning signal only to the blanket cleaning mechanism section 51 of U and 24L that requires the blanket cleaning (the one used for the printing operation before the switching) to perform the cleaning operation. When the cleaning end signal is input from 41, the sending of the cleaning signal for causing the blanket cleaning mechanism section 51 to perform the cleaning operation is stopped.

In this embodiment, blanket cleaning is performed during the printing unit switching period of the offset rotary printing press 10 as follows. FIG. 3 is a timing chart of blanket cleaning during the printing unit switching period. First, the offset rotary printing press 10 has a normal printing speed (700 rpm in this embodiment) with a total of four printing units including a switching printing unit 11 and base printing units 13 to 15.
It is assumed that the printing operation is performed in. The switching printing unit 12 is in a stopped state.

In the printing unit switching period from this printing state, each printing unit 11, 13 to 15 is decelerated to the blanket cleaning speed (200 rpm in this embodiment).
Further, substantially in parallel with this deceleration period, the pre-driving of the switching printing unit 12 used in the printing operation after the switching (rotation in a state where the printing unit 12 is not connected to another printing unit) is performed, and the printing unit 12 is cleaned at the blanket cleaning speed. The speed is increased up to (dotted line in FIG. 3) and synchronized (speed synchronized) with the other rotating printing units 11, 13 to 15. Then, during this deceleration period, the blanket cleaning device 50 enters a cleaning preparation stage based on a command from the automatic switching control device 41.

Next, after the printing units 11, 13 to 15 have reached the blanket cleaning speed, each printing unit 1
1, 13 to 15 water supply device 26 and ink supply device 25
The respective rollers and the blanket cylinders 24U and 24L are put into the released state in preparation for the blanket cleaning operation.

Then, the automatic switching controller 41 sends a cleaning start signal to the blanket cleaning controller 52. At the same time, the automatic switching control device 41 informs the blanket cleaning control section 52 of a selection signal indicating that blanket cleaning is performed for each of the printing units 11, 13 to 15 and blanket cleaning is not performed for the printing unit 12. To send. The blanket cleaning control unit 52, to which the cleaning start signal and the selection signal have been input, sends a cleaning signal to the blanket cleaning mechanism unit 51 of each of the blanket cylinders 24U and 24L of each of the printing units 11, 13 to 15 to be subjected to blanket cleaning, The blanket cleaning operation is started.

After a certain time has passed from the start of the blanket cleaning, the automatic switching control device 41 sends a cleaning end signal to the blanket cleaning control section 52 to stop the cleaning operation of the blanket cleaning mechanism section 51 to perform the blanket cleaning. Let it complete.

After the blanket cleaning is completed, the blanket cylinders 24U, 24L of the rotating switching printing unit 11 are temporarily put on (contact with the web 16) and after a predetermined time has passed or the blanket cylinders 24U, 24L. After a predetermined rotation of the printing unit 11, the printing unit 11 is disengaged again, and then the unit clutch (for connecting and disconnecting with the subline shaft 33) of the printing unit 11 is disengaged to release the connection between the printing unit 11 and the printing units 13 to 15 for base printing, and the brake Then, the printing unit 11 is stopped (indicated by a chain double-dashed line in FIG. 3). Therefore, in the stopped state of the printing unit 11, each roller of the water supply device 26 and the ink supply device 25 of the printing unit 11 and the blanket cylinder 24.
U and 24L are all in a de-stated state.

On the other hand, after the blanket cleaning is completed,
A unit clutch (subline shaft 33) of the printing unit 12 for switching which is synchronized with the blanket cleaning speed.
(For intermittent connection with the printing unit 12) and the printing units 13 to 15 for base printing are connected to each other, and then these four printing units 12 and 13 to 15 are temporarily set to 400r.
The speed is increased to pm, and in parallel with this speed-up period, the water supply device 26 of each of the four printing units 12, 13 to 15, the rollers of the ink supply device 25, and the blanket cylinders 24U, 24L are placed in a worn state. To do. Finally, once 4
Each of the four printing units 12 speeded up to 00 rpm,
After confirming the printing quality by keeping 13 to 15 at 400 rpm for a certain period of time, the printing speed is further increased to return to the printing operation at the normal printing speed.

According to this embodiment, the following effects can be obtained. That is, since the blanket cleaning is performed during the unit switching period, the switching printing units 11 and 12 are
Since it is possible to superimpose the broke generated by the switching operation of No. 1 and the broke generated by the blanket cleaning, it is possible to reduce the broke as a whole and improve the printing efficiency.

After the blanket cleaning is completed, the blanket cylinder 24 of the printing unit 11 which is not used in the printing operation after the switching among the switching printing units 11 and 12 is switched.
Since the U and 24L are once attached to and removed from the web 16, the cleaning liquid attached to the blanket of the blanket cylinders 24U and 24L of the printing unit 11 can be surely absorbed by the web 16 and the printing is performed. It is possible to prevent the inconvenience of defective printing caused by the cleaning liquid remaining on the blanket after the operation is restarted.

Further, in the blanket cleaning device 50, the blanket cleaning control unit 52 controls the automatic switching control device 41.
A selection signal from the printer and a cleaning start / end signal are automatically input, and based on these signals, the blanket cleaning controller 52 outputs the blanket cleaning mechanism 51 of each printing unit.
Since it is configured to send a cleaning signal to the blanket cleaner, it is possible to realize the blanket cleaning of only the blanket cylinder that requires cleaning at an appropriate timing. Therefore, the unit switching period and the blanket cleaning period can be matched with each other, and the burden on the operator can be reduced and wasteful use of the cleaning liquid can be prevented.

Further, since the blanket cleaning is performed by decelerating from the normal printing speed to the blanket cleaning speed, it is possible to reduce the web 16 running in the non-printing state during the blanket cleaning to reduce the waste paper and it is suitable for the cleaning. The blanket cylinders 24U and 24L can be cleaned with the number of rotations of the blanket cylinders 24U and 24L, and the cleaning efficiency can be improved.

The present invention is not limited to the above-described embodiments, but includes other configurations that can achieve the object of the present invention, and the following modifications and the like are also included in the present invention. That is, in the above embodiment, the normal printing speed is 700 rpm and the blanket cleaning speed is 200 rp.
However, the number of revolutions is not limited to these. Further, it is not always necessary to distinguish between the normal printing speed and the blanket cleaning speed. However, it is preferable to set different rotation speeds as in the above-described embodiment, and by doing so, it is possible to reduce waste paper, realize blanket cleaning at an appropriate rotation speed, and improve cleaning efficiency.

Further, in the above embodiment, when the blanket cleaning speed is returned to the normal printing speed after the blanket cleaning is completed, the speed is increased in two steps (in the above embodiment, the speed is once increased to 400 rpm and 400 rpm for a fixed time). However, the present invention is not limited to such a two-step speedup, and for example, the normal printing speed may be immediately returned. However, the speed is increased in two steps as in the above embodiment, and in parallel with the speed increase in the first step, the water supply device 26 of each printing unit, the rollers of the ink supply device 25, and the blanket cylinders 24U, 24L are set in the attached state. By doing so, it is possible to reduce the loss of paper that occurs until a stable printing state is achieved.

Further, the details of the timing of each switching operation such as the attachment / detachment of the rollers of the water supply device 26 and the ink supply device 25 of each printing unit and the blanket cylinders 24U and 24L during the printing unit switching period are described in the above embodiment. The timing is not limited, and in short, in the present invention, the blanket cleaning may be performed during the printing unit switching period of the switching type continuous operation printing machine.

Further, in the above embodiment, the blanket cleaning device 50 is configured to perform the blanket cleaning based on the selection signal and the cleaning start / end signal from the automatic switching control device 41. However, the blanket cleaning is performed based on a signal from another portion of the offset rotary printing press 10 instead of a signal from the automatic switching control device 41 or by a manual operation of an operator. May be provided, and in short, the blanket cleaning may be performed during the printing unit switching period.

In the above embodiment, the offset rotary printing press 10, which is a switching type continuous operation printing press, is provided with five printing units 11 to 15, two printing units 11 and 12 of which are for switching. However, the number of printing units of the switching type continuous operation printing machine to which the operating method of the present invention is applied is arbitrary.
For example, the number may be two to four, or six or more.
The number of printing units for switching among the arbitrary plurality of printing units thus installed does not have to be two as in the above-described embodiment, and may be three or more. Good. In the case where the switching type continuous operation printing machine is configured to include two printing units in total, both printing units may be used as switching printing units.

[0042]

As described above, according to the present invention, the blanket cleaning is performed during the printing unit switching period.
The broke generated by the printing unit switching operation and the broke generated by the blanket cleaning can be overlapped, so that the broke can be reduced as a whole and the printing efficiency can be improved. There is.

Further, when the blanket cleaning is performed by decelerating from the normal printing speed to the blanket cleaning speed, waste paper can be further reduced, and the blanket cleaning at the number of revolutions of the blanket cylinder suitable for cleaning can be performed. It has the effect of being able to realize and improving the cleaning efficiency.

Further, when the blanket cylinder of a printing unit that is not used in the printing operation after switching among the switching printing units after the completion of the blanket cleaning is once put on the continuous paper for printing and then released. Is
Since it is possible to reliably absorb the cleaning liquid on the blanket of the printing unit into the continuous paper, it is possible to prevent the inconvenience of printing failure due to the cleaning liquid remaining on the blanket after the printing operation is restarted. .

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an offset rotary printing press which is a switching type continuous operation printing press according to an embodiment of the present invention.

FIG. 2 is a detailed configuration diagram of a printing unit that constitutes the rotary offset printing press of the embodiment.

FIG. 3 is an explanatory diagram showing a timing chart of blanket cleaning during the printing unit switching period of the embodiment.

[Explanation of symbols]

10 Offset rotary press which is a switching type continuous operation printing machine 11, 12 Switching printing unit 13, 14, 15 Printing unit for base printing 16 Web (continuous paper) 24U, 24L Blanket cylinder 41 Automatic switching control device 50 Blanket cleaning equipment

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-2-153743 (JP, A) JP-A-4-7152 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41F 33/16 B41F 33/00

Claims (3)

(57) [Claims] 1. A switching printing unit in which at least two or more printing units of a plurality of printing units are switched and selectively used, and these switching units are used while a continuous paper for printing is running. Is a method of operating a switching-type continuous operation printing machine for performing continuous printing by switching the printing units of the above, wherein each of the printing units includes a plate cylinder provided with a printing plate above and below the continuous paper, and a plate cylinder of these plates. A blanket cylinder that transfers ink from the printer to print on continuous paper, an ink supply device that supplies ink to each plate cylinder, a water supply device that supplies water to each plate cylinder, and is provided near the blanket cylinder. The
And a blanket washing mechanism of the blanket washing device for cleaning the blanket cylinder, said plurality of printing Yoo
Among the knits, the printing unit currently used for continuous printing
And a printing unit that is not currently used for continuous printing.
When switching, run the continuous paper in a printing halt state
In addition, during the switching period of the two printing units for switching, the blanket cleaning mechanism section of the blanket cleaning device is currently used for the continuous printing.
A method for operating a switching type continuous operation printing press, characterized in that the blanket cylinder of the knit is washed. 2. A method of operating a switching-type continuous operation printing press according to claim 1, wherein a printing unit currently used for continuous printing among the plurality of printing units, and
Switch between printing units that are not used for continuous printing
At this time, the printing unit in the printing state is decelerated from the normal printing speed to the blanket cleaning speed, and
While the blanket cleaning is performed separately from the continuous paper , the switching printing unit of the switching printing unit which is in the printing state after switching is accelerated from the stop state to the blanket cleaning speed and the other printing unit is rotating. After completion of the blanket cleaning, the printing unit used in the printing operation after switching among the plurality of printing units is accelerated to a normal printing speed, and the printing operation after switching among the switching printing units is performed. A method for operating a switching type continuous operation printing press, which comprises stopping a printing unit that is not used in the printer. Te 3. A process according to claim 1 or driving method smell the switching type continuously operative printing machine according to claim 2, the blanket cylinder of the not used in the printing operation after switching the printing unit of the printing unit before Symbol switching the preparation for blanket cleaning operation performed after reaching the blanket cleaning rate Lee
State to the relative Nki feed and a water supply device is detached from, after completion of the blanket cleaning, the
In order to absorb the cleaning liquid adhering to the blanket, the continuous paper was once put on and then released again,
After that, the operation method of the switching type continuous operation printing press, characterized in that the printing unit not used in the printing operation is stopped after the switching.