JP2589863B2 - Printer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing press capable of replacing a printing plate without stopping the printing press during printing.

[Conventional technology]

Printed materials, especially those intended for news-related information such as newspapers, are often printed by replacing only part of the surface during printing.For example, when top news enters, only the first surface is replaced. Alternatively, as a preset case, only the local version is replaced in one version.

As a conventional printing press that prints a printed matter while performing such a printing plate replacement operation, when performing multicolor printing on one side, a printing unit including a blanket cylinder and a plate cylinder around one common impression cylinder is used. A multi-color printing press provided with a number of sets corresponding to the number of colors to be printed, or a pair of blanket cylinders provided opposite to each other on both sides of a printed material when printing on both sides and engaging with each blanket cylinder 2 2. Description of the Related Art A printing machine including two plate cylinders and the like is known.

[Problems to be solved by the invention]

However, in the conventional printing press as described above, when replacing any one of the printing plates, the entire printing press must be stopped and the old printing plate and the new printing plate must be replaced. And there is an inconvenience that a lot of waste paper is generated.

As a method for addressing the above-described inconvenience, a method of performing continuous printing using the configuration of a printing machine that performs printing with spot colors can be considered.

The printing machine that performs the spot color printing, such that one of the pair of blanket cylinders selectively engages the first plate cylinder, and the other blanket cylinder engages either the second plate cylinder or the third plate cylinder. When printing with spot colors, color ink is supplied to the third printing cylinder to perform color printing.For normal text printing, the third printing cylinder is not used and the other blanket cylinder is used. The gear is disengaged to release the gear.

When such a printing press is diverted, the third plate cylinder is used instead of the second plate cylinder not for color printing but for standby in normal printing.

However, even if it is simply diverted in the above configuration, if the printing plate to be replaced during standby is attached to the third plate cylinder in advance, the time until printing by the third plate cylinder is reduced. However, the printing press must be stopped when the plate cylinder is changed due to the engagement of the gears, and it is still impossible to change the printing plate and perform continuous printing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the conventional printing press, and has as its object to change printing plates freely in order to change the print content of printed matter and to perform continuous printing. To provide a printing machine that can

[Means for solving the problem]

Therefore, in the present invention, as a means for solving the above problems, one blanket cylinder, a plurality of plate cylinders provided to be able to freely contact and separate from the blanket cylinder, provided for each plate cylinder, and an impression cylinder or a blanket cylinder are provided. A printing unit comprising a phase adjusting means for adjusting the phase of the printing cylinder and a switching means for switching the drive shaft of each plate cylinder, and an impression cylinder, and printing on one plate cylinder while printing on another plate cylinder. Replace and wait for preparation,
During this preparation standby, the phase is adjusted by the phase adjusting means, and immediately after the end of the printing, the printing medium is switched to one of the other printing cylinders by the switching means so that the printing cylinder can be selectively replaced, and printing is continuously performed. That is, the configuration of the printing machine used was adopted.

Further, as a solution in the case of performing double-sided printing, it is possible to adopt a configuration of a printing machine which includes two sets of the printing units and has blanket cylinders provided to face each other.

Further, as a solution in the case of performing multi-color printing, a configuration of a printing machine in which a plurality of sets of the printing units are provided around one impression cylinder can be used. Alternatively, as another solution, the printing unit of the printing unit can be used. A configuration of a printing press in which a plurality of sets are provided to be able to freely contact and separate around one impression cylinder may be adopted.

Also, as another solution corresponding to the first solution,
One blanket cylinder, one plate cylinder detachably provided on the blanket cylinder, phase adjustment means provided for the plate cylinder for adjusting the phase with the impression cylinder, and switching for switching the drive shaft of the plate cylinder. A plurality of sets of printing units comprising a plurality of printing units and an impression cylinder, wherein one set of printing units is performing printing and one of the printing units of another printing unit is replaced with a printing plate to be ready for preparation. Adjust the phase by adjusting means,
Immediately after the printing is completed, the printing unit may be switched to one plate cylinder of the other printing unit by a switching unit so that the printing unit can be selectively replaced, and a printing machine that performs continuous printing may be employed.

Furthermore, as a solution in the linear printing method, one impression cylinder, a plurality of plate cylinders which are engaged with and separated from the impression cylinder, and the phases of the impression cylinders provided for each plate cylinder are adjusted. A phase adjusting means and a switching means for switching the drive axis of the plate cylinder, wherein one plate cylinder is being printed and one of the other plate cylinders is replaced with a printing plate to be ready for preparation; Immediately after the printing is completed, the phase is adjusted by the adjusting means, and the printing cylinder is switched by one of the other printing cylinders so that the printing cylinder can be selectively replaced. You can also.

The phase adjusting means in any one of the above-mentioned solving means may comprise a differential device provided on a support shaft of the plate cylinder, a motor for vertical registration adjustment connected to the differential device, and rotation with respect to an impression cylinder or a blanket cylinder. It comprises a phase detector for detecting the phase.

The switching means comprises an eccentric bearing supported on a support shaft of the plate cylinder and a driving means therefor.

Alternatively, the phase-neutral means detects a common motor for vertical register adjustment provided on a common shaft selectively connected to a support shaft of each of the plurality of plate cylinders, and a rotational phase with respect to an impression cylinder or a blanket cylinder. It can also be composed of a phase detector.

[Action]

In the first invention configured as described above, one blanket cylinder and a plurality of plate cylinders are provided for one impression cylinder on one side of the printed matter. When the printing plate is to be replaced during printing at high speed by one of the plurality of plate cylinders, the printing plate is first wound around one of the other plate cylinders at rest and printing is performed.

When printing is completed, the plate cylinder is rotated by the drive shaft to obtain a synchronous speed at which the plate cylinder can be engaged with the impression cylinder. Even when the plate cylinder is rotated synchronously, the printing position may not match the printing plate which is still printing. For this reason, the phase adjustment means detects the phase of the plate cylinder to be replaced with the reference phase of the impression cylinder, calculates the phase difference in the electric control circuit, and rotates the plate cylinder until the phase difference becomes zero. Accelerate and adjust the top and bottom register.

When the phase difference becomes 0, the top / bottom register adjustment is stopped, the detection signal is sent to the switching means, and the plate cylinder to be changed at the same time as the plate cylinder for which printing is to be changed is inserted while the plate cylinder being printed is missed. Replacement is completed. Printing is thus performed continuously on the printed matter without stopping the printing press.

According to a second aspect of the invention, a printing unit according to the first aspect of the present invention, in which a plurality of plate cylinders are selectively and removably engaged with a blanket cylinder, is provided on both sides of a printed material. Therefore, if any one of the plate cylinders is selectively and alternately replaced on any one side, the operation is basically the same as that of the first invention.

The third invention has a configuration suitable for multicolor printing. A plurality of printing units are provided with the number of units matching the color of the print content to be printed.

When performing color printing with different print designs, a set of other plate cylinders from the first set of plate cylinders is selected and used for each printing unit.

The fourth invention also has a configuration suitable for multi-color printing, but in this case, it is possible to select some specific colors as the colors to be used and print them in combination.

If it is desired to change the content of the printing without changing the color, another set of printing cylinders is used as in the third invention.

The fifth invention is suitable for single-color printing as in the first and second inventions, and the printing unit includes one blanket cylinder and one plate cylinder, and selects one of a plurality of sets of the printing unit. To engage with the impression cylinder to perform printing. The blanket cylinder is driven by a synchronous rotation mechanism provided between the blanket cylinder and the plate cylinder.

The sixth invention is a configuration in which the basic idea of the present invention is applied to the configuration of a printing machine using a direct printing system, while the above-mentioned inventions are all indirect printing systems. Therefore, a blanket cylinder is not provided, and printing is performed by engaging one of the plurality of plate cylinders with the impression cylinder.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. First Embodiment (FIGS. 1 and 2) This embodiment is for a case where a single color is printed on one side of a printed material W.

As shown in FIG. 1, the printing press of this embodiment has a plate cylinder 3, 3 'with respect to a blanket cylinder 2 which engages one impression cylinder 1.
Are provided so as to selectively engage with each other. Although not shown in the illustrated example, the plate cylinders 3 and 3 ′ are respectively supported by the blanket cylinder 2 so that they can be inserted and released.

The support mechanism generally supports the support shafts at both ends of the plate cylinders 3 and 3 'with eccentric bearings, and rotates the eccentric bearings by drive means to move the plate cylinders 3 and 3' to the blanket cylinder 2 as in a normal printing press. (Not shown). The eccentric bearing and the driving means form a switching means.

In this embodiment, a synchronous rotation mechanism (not shown) using gears is provided between the impression cylinder 1 and the blanket cylinder 2, but the synchronous rotation mechanism is provided between the blanket cylinder 2 and the plate cylinders 3 and 3 '. No mechanism is provided.

The impression cylinder 1 is driven to rotate by a drive shaft 21. This drive shaft
21 is a main drive shaft 20 that rotationally drives a plurality of printing presses, a gear 2
2. It is connected to a gear 24 via a shaft coupling 23, is branched and connected by the gear 24, and the other branched drive shafts 21 are respectively connected to the plate cylinders 3 and 3 'as described later. .

Each of the plate cylinders 3 and 3 'has a plate hanging motor 9 on one side of its support shaft via a gear 7 and a clutch 8, respectively. Ten
Is an encoder for detecting the rotation phase of the plate cylinder by the motor 9.

Further, each of the plate cylinders 3 and 3 'is provided with the drive shaft 21 on the other side of its support shaft by a powder clutch 11, a gear clutch 12, a gear 13,
They are connected via a differential device 14. The differential device 14 is connected to a motor 15 for top and bottom register adjustment. Differential device 14 is of a conventional type. The encoder 10, the differential device 14, and the motor 15 form phase adjusting means. An encoder 17 for detecting the rotational phase of the impression cylinder 1 is connected via a gear 16.

FIG. 2 shows the detailed structure including the drive units of the two sets of plate cylinders 3, 3 '. The structure of each set is basically the same.

The printing press of this embodiment configured as described above operates as follows.

Now, it is assumed that the plate cylinder 3 is inserted and the plate cylinder 3 'is in a state of being released. In this state, it is assumed that the printing machine is printing on the print W at a speed of, for example, 100,000 copies per hour. When the contents of the printing plate are to be replaced at a certain point, another printing plate (not shown) is first attached to the plate cylinder 3 'at rest. Installation of this printing plate
This is performed by turning on the clutch 8 and the plate hanging motor 9.

When the printing operation is completed, the motor 9 is stopped, and then the printing drum 3 '
Is driven to rotate. At this stage, the plate cylinder 3 'has not been inserted yet. The rotation drive transmits the rotation of the drive shaft 21 to the plate cylinder 3 'by first turning on the powder clutch 11. However, the powder clutch 11 synchronizes with a slight delay from the stop state to the predetermined rotation of the plate cylinder 3 'and the blanket cylinder 2 due to the slip.

When the rotation completely reaches the predetermined rotation, the clutch is switched to the gear clutch 12. The reason why the clutch is a two-stage clutch is to reduce the impact when the plate cylinder 3 'starts rotating. Since both the impression cylinder 1 and the plate cylinder 3 ′ are rotated by the drive shaft 21, it is easy to synchronize the rotation of the plate cylinder 3 ′ with the impression cylinder 1.

In this way, printing cannot be performed immediately even if the rotations are synchronized, and before that, mutual vertical registration of the printing plate of the plate cylinder 3 'to be replaced with the printing plate being printed is required. Therefore, this time, the motor 15 for top and bottom register adjustment is started.

When the motor 15 is started, the housing 14 '(see FIG. 2) of the differential device 14 rotated by this is rotated,
The number of rotations is added to the number of rotations of the drive shaft 21, and the plate cylinder 3 'rotates faster than the impression cylinder 1 by that amount.

On the other hand, the number of rotations of the impression cylinder 1 is measured every moment by the encoder 17, the number of generated pulses is calculated by an electric control circuit (not shown), and the phase with respect to the reference point is calculated based on the lapse of time.

The rotation speed and phase of the rotation of the plate cylinder 3 'are similarly calculated by the encoder 10. Accordingly, the difference between the phase of the origin by the encoder 17 of the impression cylinder 1 and the phase by the encoder 10 of the plate cylinder 3 'is compared by, for example, a comparison circuit of an electric control circuit. If there is a phase difference, a command based on the phase difference is issued. The motor 15 for top and bottom register adjustment is driven by a signal to rotate the plate cylinder 3 'at a higher speed than the impression cylinder 1.

During the phase control, the reference phases of the plate cylinder 3 'and the impression cylinder 1 match. If the two phases match, the matching signal is sent to the switching means as required for switching, the plate cylinder 3 is escaped, the plate cylinder 3 'is inserted, and printing by the plate cylinder 3' is started. . Immediately after switching, the plate cylinder 3 '
Is returned to a state of rotating synchronously with the impression cylinder 1.

When the user wants to change the print content by replacing another printing plate, the plate cylinder 3 'is replaced with the plate cylinder 3 in the same manner as described above. In this way, the plate cylinder 3 and the plate cylinder 3 'can be selectively and alternately replaced.

In performing the above-described plate cylinder replacement work, conventionally, it was necessary to stop the entire printing press and replace the plate cylinder, but in the case of this embodiment, plate hanging on the plate cylinder to be replaced, If the operations of the synchronous rotation drive and the vertical registration adjustment are performed in advance, the plate cylinder can be replaced continuously without stopping the operation of the printing press.

When replacing the plate cylinder, the encoder 1
0, 17 to detect the rotational phase of the impression cylinder 1, the plate cylinder 3, 3 ',
A command signal for driving the rotation of the motor 15 of the differential device 14, the motor 9 for printing, and the drive unit of the switching means, a powder latch
11, the on / off instruction of the gear clutch 12 and the like are all performed by sequence control from an electric control circuit (not shown),
The description is omitted here because it is not a main part of the present invention.

Second Embodiment (FIG. 3) This embodiment is an example in which a single color is printed on both sides of a printed material W.

As shown in FIG. 3, the configuration of the printing press of this embodiment is as follows.
The printing unit of the first embodiment is provided so as to face both sides of a printed material W. Therefore, a pair of blanket cylinders 4,
4 'are provided facing each other, and each blanket cylinder 4,
4 'is provided with two sets of two plate cylinders which selectively engage one another, a total of four plate cylinders 5, 6, and 5', 6 '. The plate cylinder is selectively replaced between 5 and 6 and between 5 'and 6'.

A printing gear 7, a clutch 8, a motor 9, an encoder 10, and a powder clutch 11 for driving and phase adjustment, which are provided in connection with each of the plate cylinders 5, 6, 5 ', 6'.
The gear clutch 12, the gear 13, the differential device 14, the motor 15 and the like are configured exactly the same as in the first embodiment. The same reference numerals are given to the same members in the drawing.

The gear 16 and the encoder 17 for detecting the rotation and phase of the impression cylinder 1 in the first embodiment are provided on the shaft of one blanket cylinder 4 as 16 'and 17', respectively. One of the blanket cylinders 4, 4 'is rotationally driven by a drive shaft 21, and the other is synchronously driven by a synchronous driving device using gears (not shown).
No synchronous rotation mechanism using gears is provided between the plate cylinders 5, 6 and 5 ', 6'.

The printing press of this embodiment configured as described above is different from the same embodiment in the main configuration, but when viewed on one side of the printed material W, for example, on the right side thereof, the impression cylinder 1 is the blanket cylinder 4 and the blanket cylinder 2 is the If the plate cylinders 3 and 3 'are regarded as corresponding to the plate cylinders 6' and 5 ', the operation is almost the same. That is, the plate cylinders 5, 6 and 5 ', 6' are selectively replaced alternately with the blanket cylinders 4, 4 ', respectively.
Printing is continuously performed while replacing the printing plate on one or both sides without stopping the entire printing press.

In the first embodiment, the top and bottom register adjustment is performed to adjust the printing position within one side of the printed matter, but in the case of this embodiment, the printing position of the front and back of the printed matter is also adjusted. Slightly different.

Since the printing press of this embodiment performs continuous printing on both sides of a printed material as described above, it is suitable for rotary printing of newspapers. When top news comes in, the first plate can be easily replaced to respond to changes in the situation.

Third Embodiment (FIG. 4) This embodiment is an example in which multicolor printing is performed on one side of a printed material.

As shown in the drawing, the printing press of this embodiment is arranged such that the blanket cylinder 2, the plate cylinders 3, 3 'of the first embodiment correspond to one impression cylinder 1.
And four printing units. The same components as those in the first embodiment are denoted by the same reference numerals, and a plurality of sets are denoted by lowercase letters a, b, c, and d.

Each blanket cylinder 2a... 2d is fixedly engaged with the impression cylinder 1, and is rotated by a synchronous rotation mechanism (not shown) using gears. There is no synchronous rotation mechanism between each of the blanket cylinders 2a... 2d and the plate cylinders 3a, 3'a.

In the printing machine of this embodiment configured as described above, multicolor printing is continuously performed as follows.

For example, the four printing units shown are lowercase letters a, b,
It is assumed that those marked with c and d are printed with cyan (blue), magenta (red), yellow (yellow) and black inks, respectively. It is assumed that the first printing plates are respectively mounted on plate cylinders 3a, 3b... 3d.

In this state, multi-color printing is performed at high speed, and when color printing with different plate contents is performed next, separate printing is performed on each of the plate cylinders 3'a. Attach the plate. The attachment of the printing plate to each printing cylinder, the phase adjustment, and the switching of the drive shaft are performed in exactly the same procedure as in the first embodiment. However, the switching of the drive shaft is performed simultaneously by the four printing units.

Therefore, since the printing plate is replaced in the above procedure,
Printing is performed continuously without stopping the entire printing press.

Fourth Embodiment (FIG. 5) This embodiment is also a case in which multicolor printing is performed on one side of a printed material, but is an example in which colors are selectively switched. Therefore, in this embodiment, the construction is almost the same as that of the third embodiment, except that the blanket cylinders 2a... Each cylinder 3a so that the cylinders 2a ... 2d can escape
a, 3'a... 3d and 3'd are different.

The mechanism for supporting each blanket cylinder so as to freely contact and separate from the impression cylinder is basically the same as the mechanism for supporting the plate cylinder of the first embodiment. FIG. 5 shows only the differences in the above arrangement. The same components as those in the third embodiment are denoted by the same reference numerals, and are driven to the plate cylinders 3a, 3'a... 3d, 3'd. The components on the shaft and the drive for plate hanging are not shown.

Color ink, for example, red, yellow is supplied to each printing unit of the blanket cylinder 2a, 2b, blue, for each printing unit of the blanket cylinder 2c, 2d,
Black shall be supplied. It goes without saying that the color selection and the combination of the printing unit and the color may be any combination other than the above.

First, it is assumed that the printing is performed by the red and yellow printing units among the four printing units. In this case, red,
The blanket cylinders 2a and 2b of the yellow printing unit are engaged with the impression cylinder 1, and a predetermined printing plate is attached to each of the first plate cylinders 3a and 3b in each of the blanket cylinders 2a and 2b to perform high-speed printing. .

Next, printing of blue and black with different print contents is performed by the blanket cylinders 2c and 2d. Also in this case, a predetermined printing plate is attached to each of the first plate cylinders 3c and 3d for each blanket cylinder, and the engagement of the red and yellow blanket cylinders 2a and 2b with the impression cylinder 1 is released at the same time. Blanket cylinder 2c, 2d
Is engaged with the impression cylinder 1 to perform continuous printing.

The attachment of the printing plate to each unit of the blanket cylinders 2c and 2d is performed in the same procedure while the printing unit is at rest, as in the first embodiment.

Furthermore, if the color selection is again the same as the previous red and yellow printing, but the printing of different printing plate contents is continuously performed, the plate cylinders 3a and 3b with the red and yellow printing plates attached two times before are printed plates. The second plate cylinder 3 'is disengaged from the blanket cylinders 2a and 2b while leaving (or may be removed) while the second plate cylinder 3' is attached.
a, 3'b are engaged with the blanket cylinders 2a, 2b, and these are engaged with the impression cylinder 1. At the same time, the blanket cylinders 2c, 2d, which have been printing blue and black previously, are applied to the impression cylinder 1. Printing is continuously performed by releasing the engagement.

Printing using the second printing plate of blue and black is also performed continuously in the same manner as described above, and thus various printing contents can be continuously performed a plurality of times in multiple colors.

Fifth Embodiment (FIG. 6) This embodiment is an example in which a single color is printed on one side of the printed material W again. As can be seen from the drawing, two blanket cylinders 2, 2 'are different from the first embodiment. Consists of two printing units provided one-to-one with each of the plate cylinders 3, 3 '. Therefore, in this case, a synchronous rotation mechanism (not shown) using gears is provided between the plate cylinders 3 and 3 'and the blanket cylinders 2 and 2', and the blanket cylinders 2 and 2 'and the impression cylinder 1 are provided.
And the synchronous rotation mechanism is not provided between them.

In addition, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The operation of this embodiment is based on the point that the two blanket cylinders 2 and 2 'described above are provided one-to-one with the two plate cylinders 3 and 3', and the manner in which the synchronous rotation mechanism is provided is different. The contacting / separating operation is different from that of the first embodiment, and is basically the same in that printing can be continuously performed without stopping the printing press by selectively engaging the two printing units with the impression cylinder 1.

Sixth Embodiment (FIG. 7) While the above-described embodiments are all printing machines using the indirect printing method, the printing machine according to this embodiment uses a direct printing method to perform single-color printing on one side of a printed material W. It is an example.

Therefore, the two printing drums 3 and 3 'are configured to selectively engage with the pressing machine 1. No synchronous rotation mechanism is provided between each of the plate cylinders 3 and 3 'and the impression cylinder 1. In addition, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

The operation of this embodiment configured as described above is different from that of the blanket cylinder 2 of the first embodiment in that the impression cylinder 1 of this embodiment corresponds to the blanket cylinder 2 of the first embodiment. It is the same in that the unit is selectively engaged with the impression cylinder 1 to perform continuous printing without stopping the printing press.

Seventh Embodiment (FIGS. 8 and 9) This embodiment is an example in which a single color is printed on one side of the printed material W again as in the first embodiment. A method of obtaining phase adjustment and synchronous rotation Are completely different.

First, two sets of plate cylinders 3, 3 'are selectively engaged with the blanket cylinder 2 which engages with the impression cylinder 1, and the blanket cylinder 2
The third embodiment is the same as the first embodiment in that the plate cylinders 3 and 3 'are respectively supported so that they can be inserted and released.

The supporting mechanism, the configuration of the switching means according to this, and the synchronous rotation mechanism are provided between the impression cylinder 1 and the blanket cylinder 2 (not shown). Is the same. Further, the same is true in that the impression cylinder 1 is driven by the drive shaft 21 and the plate cylinders 3, 3 'are driven by the other branched drive shafts 21.

However, as shown in the figure, the mechanism for giving the rotation of the branched drive shaft 21 to each plate cylinder 3, 3 'and the mechanism for adjusting the phase are different as follows.

As shown in a detailed view of FIG. 9, each plate cylinder 3, 3 'has pulleys 7X, 7X' and clutches 8X,
'Have a common servo motor 9 through a timing belt T _B' 8X is connected to.

The servo motor 9 'is used for a printing operation and a phase adjustment as described later. 10X and 10X ′ are encoders for detecting the rotational phase of the plate cylinder, and reduce the rotational speed of the plate cylinder to 1: 1.
Uses an absolute encoder that detects with.

The mechanism for transmitting the rotational driving force to each of the plate cylinders 3 and 3 'during normal operation is completely different as shown in FIG.

That is, the rotational force from the branched drive shaft 21 is transmitted in parallel from the gear 13 to the clutches 11X and 11X 'and the gears 12X and 12X' provided at the other ends of the plate cylinders 3 and 3 '. It is configured as follows. Thus, one clutch is provided for each plate cylinder.
There is only a set, and the differential device 14 as in the first embodiment is not provided.

The top and bottom adjustment unit 14X and the motor 15X in FIG. 9 are provided in connection with the following eighth embodiment, and the description will be given later.

17X is an absolute encoder for detecting the rotation phase of the blanket cylinder 2.

 Next, the operation of the printing press of this embodiment will be described.

Now, the plate cylinder 3 is inserted, and the plate cylinder 3 'is set in the state of being released.
For example, it is assumed that a print W is being printed at a speed of 100,000 copies per hour. In this case, the clutch 11X is ON, the other clutches 11X ',
8X and 8X 'are OFF.

In this state, another plate is attached to the plate cylinder 3 'at rest to replace the contents of the plate. Installation of this printing plate
This is performed by turning on the clutch 8X 'and the servomotor 9'.

When the plate hanging operation is completed, the servo motor 9 'is turned on, for example, three times per hour.
Accelerate to the speed of 10,000 presses. At the same time, the rotation of the main drive shaft 20 is reduced to the above-mentioned speed of 30,000 parts per hour, and the printing speed of the plate cylinder 3 during printing is reduced.

While the rotational speed of the plate cylinder 3 'is synchronously controlled by the servomotor 9' with respect to the reduced printing speed of the plate cylinder 3,
The phase adjustment of the plate plates of the plate cylinders 3 and 3 'is performed by a control circuit (not shown) based on the pulse signals from the absolute encoders 17X and 10X'.

When the phase adjustment and the synchronous rotation adjustment are completed, a completion signal is sent to the switching means of each of the plate cylinders 3 and 3 ', the plate cylinder 3 is released, the plate cylinder 3' is inserted, and the clutch 11
X is OFF, the clutch 11X 'is turned ON, and printing by the plate cylinder 3' is started.

After the start of the printing, the rotation of the main drive shaft 20 is accelerated again to the normal speed, and the operation shifts to the normal operation.

Further, when replacing with another printing plate, the plate cylinder 3 'is replaced with 3 in the same manner as described above, and both can be selectively replaced to continue printing continuously.

Eighth Embodiment (FIG. 10) This embodiment is an example in which monochrome printing is performed on both sides of a printed matter W in the same manner as in the second embodiment. This is a printing machine provided on both sides.

The plate cylinders 5, 6 and 5 ', 6' of the pair of blanket cylinders 4, 4 'are provided in the same relationship as in the second embodiment. Thus, the plate cylinder is selectively replaced between 5 and 6 and between 5 'and 6'.

One of the blanket cylinders 4, 4 'is rotationally driven by a drive shaft 21 and the other is synchronously driven by a synchronous driving device, so that the blanket cylinders 4, 4' and the respective plate cylinders 5, 6, and 5 ',
No synchronous rotation mechanism using gears is provided between 6 '.

A phase adjustment (synchronization adjustment) mechanism connected to the plate cylinders 5, 6 and 5 ', 6' and a mechanism for transmitting the main driving force are also provided similarly to the seventh embodiment.

The operation of the printing press of this embodiment is also the same as the operation obtained by providing the printing unit of the first embodiment in opposition in the second embodiment, and therefore, for each of the blanket cylinders 4 and 4 '. The plate cylinders 5, 6 and 5 ', 6' are selectively replaced alternately, and the plate is replaced on one or both sides without stopping the entire printing press.
Printing is performed continuously.

The top and bottom adjustment unit 14X and the motor 15X in FIG. 9 are provided in the case of the printing press of this embodiment. The top and bottom adjustment unit 14X
A screw is provided on the shaft connected to the motor 15X, and when the motor 15X is rotated, the helical gear 12X is moved in the axial direction, and the counterpart can be adjusted by changing the tooth contact with the helical gear. it can.

However, this apparatus is unnecessary for the present invention, and is used when the printing press of this embodiment is used for the spot color printing of the above-described conventional example.

In each of the above-described embodiments, the printed matter W is described as a continuous sheet. However, it is needless to say that the printed matter W is not limited to this, and can be applied to, for example, continuous printing on a single sheet. No.

It will be apparent to those skilled in the art that the present invention can be applied to various printing machines within the scope of the basic idea of the present invention other than the various embodiments according to the present invention.

〔effect〕

As described in detail above, the present invention provides a printing unit including a blanket cylinder and a plurality of plate cylinders provided on an impression cylinder, a printing unit including two sets of the printing units opposed to each other, Units provided for multiple sets of impression cylinders, or multiple sets of printing units consisting of one blanket cylinder and one plate cylinder provided for impression cylinders, or multiple plate cylinders for impression cylinders A printing unit comprising two sets of blanket cylinders and plate cylinders, wherein each printing unit or plate cylinder is selectively engaged with or separated from an impression cylinder or blanket cylinder. Are provided, and each printing unit can be selectively replaced. Therefore, in the event that printing needs to be replaced urgently, such as in top use, the plate cylinder or printing unit can be used without stopping the printing press. Replacement can continuously printed, thus lowering the productivity is prevented, the advantage of being able to significantly reduce the occurrence of waste paper obtained.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of a first embodiment of a printing press according to the present invention, FIG. 2 is a detailed plan view including various components provided on a support shaft of a plate cylinder, and FIG. FIG. 4 is an overall schematic configuration diagram of the third embodiment, FIG.
FIG. 6 is an overall schematic configuration diagram of the fourth embodiment, FIG. 6 is an overall schematic configuration diagram of the fifth embodiment, FIG. 7 is an overall schematic configuration diagram of the sixth embodiment, and FIG. 8 is an overall schematic diagram of the seventh embodiment. FIG. 9 is a detailed plan view including various components provided on the support shaft of the plate cylinder, and FIG. 10 is an overall schematic configuration diagram of the eighth embodiment. 1 ... impression cylinder, 2, 2 '... blanket cylinder, 3, 3' ... plate cylinder, 4, 4 '... blanket cylinder, 5, 5', 6, 6 '... plate cylinder, 7 ... Gear, 8, 8X, 8X '... Clutch, 9 ... Motor for plate hanging, 9' ... Servo motor, 10, 17, 17 '... Encoder, 10X, 10X', 17X, 17X '... Ab Lute encoder, 11 ... powder clutch, 11X, 11 '... clutch, 12 ... gear clutch, 14 ... differential device, 15, 15X ... motor for top and bottom register adjustment, 21 ... drive shaft.

Claims (9)

(57) [Claims] 1. A blanket cylinder, a plurality of plate cylinders provided on the blanket cylinder so as to be able to come and go, a phase adjusting means provided for each plate cylinder to adjust the phase with the impression cylinder or the blanket cylinder. And a printing unit comprising switching means for switching the drive shaft of each plate cylinder, and an impression cylinder, and while printing is being performed on one plate cylinder, the printing plate is replaced with one of the other plate cylinders, and a preparation standby is performed. During this preparation standby, the phase is adjusted by the phase adjusting means, and immediately after the end of the printing, the printing medium is switched to one of the other printing cylinders by the switching means so that the printing cylinder can be selectively replaced, and printing is continuously performed. A printing machine characterized by performing. 2. A blanket cylinder, a plurality of plate cylinders provided so as to be able to contact and separate from the blanket cylinder, phase adjusting means provided for each plate cylinder to adjust the phase with the blanket cylinder, and each plate. Two sets of printing units each comprising switching means for switching the drive shaft of the cylinder are provided, and blanket cylinders of each printing unit are provided so as to face each other, and each printing unit performs printing on one printing cylinder with one of the other printing cylinders. The printing plate is exchanged to prepare for standby, and during this standby for preparation, the phase is adjusted by the phase adjusting means. Immediately after the end of the printing, the printing medium is switched to one of the other printing cylinders by the switching means to change the printing cylinder. A printing machine characterized by being capable of being selectively replaced and performing continuous printing. 3. The printing press according to claim 1, wherein a plurality of sets of the printing units are provided around one impression cylinder. 4. The printing press according to claim 1, wherein a plurality of sets of the printing units are provided so as to be able to freely contact and separate around one impression cylinder. 5. A blanket cylinder, one plate cylinder provided on the blanket cylinder so as to be able to come and go, phase adjusting means provided for the plate cylinder to adjust the phase with the impression cylinder, and driving of the plate cylinder. A printing unit comprising a plurality of sets of printing units comprising switching means for switching axes, and an impression cylinder are provided. During printing by one set of printing units, a plate cylinder printing plate of one of the other printing units is exchanged to be ready for preparation. During the preparation standby, the phase is adjusted by the phase adjusting means, and immediately after the end of the printing, the printing unit is switched to one plate cylinder of the other printing unit by the switching means so that the printing unit can be selectively replaced. A printing machine characterized in that printing is performed on a printing machine. 6. An impression cylinder, a plurality of plate cylinders which are engaged with and separated from the impression cylinder, phase adjustment means provided for each plate cylinder to adjust the phase of the impression cylinder, and a plate. Switching means for switching the drive axis of the cylinder, while printing is being performed on one plate cylinder, the printing plate is exchanged with one of the other plate cylinders, and the plate is prepared for standby. During the preparation standby, the phase is adjusted by the phase adjusting means. The printing press is characterized in that, immediately after the printing, the printing cylinder is switched by one of the other printing cylinders so that the printing cylinder can be selectively replaced and printing is continuously performed. 7. The phase adjusting means includes a differential provided on a support shaft of the plate cylinder, a motor for adjusting a vertical register connected to the differential, and a rotational phase with respect to an impression cylinder or a blanket cylinder. The printing press according to any one of claims 1 to 6, comprising a phase detector for detecting. 8. The printing press according to claim 1, wherein said switching means comprises an eccentric bearing for supporting a support shaft of said plate cylinder and a driving means therefor. 9. A phase-adjustment common motor provided on a common shaft selectively connected to a support shaft of each of the plurality of plate cylinders, and a rotational phase with respect to an impression cylinder or a blanket cylinder. The printing device according to claim 1, further comprising a phase detector that detects the phase difference.