JPH028585B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a lithographic printing press having a plurality of plate cylinders.

More specifically, the present invention relates to a lithographic printing machine capable of freely switching between plates, which prints specified information on the printing paper by switching between various types of plates at any time or alternately on the printing paper fed by a paper feeding means. .

[Prior art and problems to be solved by the invention] Conventionally, planographic printing machines have a large number of plate cylinders and can arbitrarily use multicolor or single color, and each of these plate cylinders is provided with an automatic plate feeding/discharging means. A lithographic printing press is known.

1 and 2 are model diagrams showing the main parts of a lithographic printing press having a plurality of plate cylinders.

In these figures, 1a, 1b, 1c are plate cylinders, 2, 2a, 2b, 2c are blanket cylinders,
3, 3a, 3b, and 3c are impression cylinders, and 4 shows the path of the paper traveling in the direction of the arrow. In these figures,
Inking device, dampening device, etching device,
Blanket cleaning device, paper feed/delivery device,
Illustrations of accessories such as a paper delivery device between printing units are omitted.

Since the lithographic printing press shown in Figures 1 and 2 does not have automatic plate feeding/discharging means, the type of information printed on the printing paper is limited to the total number of combinations of plate cylinders (where n is the number of plate cylinders). , _o 〓 ⁱ⁼¹ Ci).

Therefore, it is extremely limited, and in order to select from among a large number of information to be printed and print the specified information on the printing paper, it is necessary to change the plate. This type of printing press therefore uses a small number of plates,
Suitable for printing a large number of sheets.

On the other hand, automatic plate supply/discharge means have already been proposed in order to quickly and easily attach and detach the plate to the plate cylinder. FIGS. 3 and 4 are model diagrams of the main parts of an example of an offset printing press having automatic plate feeding/discharging means.

In these figures, symbols 1 to 4 represent the first to second
In these figures, 5a, 5
b is a plate feeding table, 6a, 6b are automatic plate feeding devices, 7a,
Reference numeral 7b indicates a plate discharge table, 8a and 8b are automatic plate discharge devices, 9 is a plate storage shelf, 10 is a plate feeding table constituting the same, and 11 is a swinging telescopic conveyor. Similar to FIGS. 1 and 2, illustration of accessories is omitted.

FIG. 3 shows a commercially available printing machine having the main parts of two printing units 12a and 12b. The plate feeding tables 5a and 5b are capable of stacking and placing a large number of plates, and are arranged such that the stacked plates can be sequentially fed and mounted on the plate cylinder.

This printing machine can perform single-color or two-color printing according to the order in which the plates are stacked on the plate feeding table in advance, but during a series of printing, information to be printed may be determined by some external information. If a change is specified, a plate with the specified information to be printed must be manually prepared on the plate feeding stand each time. In addition, in this printing machine, the plate supply/discharge table is provided independently for each plate cylinder of the printing unit, so it is necessary to prepare a large number of plates for each plate cylinder, making the structure of the printing machine complex and large. It has the problem of becoming.

FIG. 4 is a model diagram showing the main parts of a monochromatic offset machine disclosed in Japanese Patent Application Laid-Open No. 53-71904. It has a large number of plate feeding tables 10, and the plates sent from the plate making section (not shown) via a conveyor 13 are sent to the plate storage shelves 9 which can be raised and lowered, and the plates are transported up and down the plate storage shelves 9 and stored on each plate feeding table. The conveyor 11 is stored in sequence one by one every 10, and each time the printing of the pre-specified number of sheets is completed, the conveyor 11 is extended and contracted as shown by the arrow and connected to the plate feeding table 10 on which the plate to be printed next is placed. The plate is taken out from the plate feeding stage and fed to the automatic plate feeding device of the plate cylinder 1.

However, this printing machine was designed to match the number of copies to be printed and the master plate making, and to eliminate unnecessary work on the printing machine. It is unsuitable for rapid switching and printing.

However, in current information processing, there are extremely many types of information to be printed. For example, utility bills such as gas, water, and electricity bills, bills issued by medical institutions to insurance institutions, and various forms at government offices and companies.
The part where information that differs depending on each document, such as the date, address, destination, amount, etc. (referred to as variable information), such as headings, background patterns, ruled lines, etc.
The part where the same information common to each document is recorded, such as the address and name of the issuer (hereinafter referred to as the fixed part,
Characters recorded or recorded in this part;
fixed information (symbols, figures, paintings, photographs, etc.). Information recording sheets such as the above-mentioned forms are prepared by preparing a desired amount of printing paper on which fixed information is printed in advance (hereinafter referred to as pre-printed paper), and then controlling the sheet to a predetermined position on this pre-printed paper using, for example, a computer. The information was processed by recording the variable information using a printing machine such as a line printer.

However, the above conventional technology using pre-printed paper has the following problems: A. If it is necessary to use pre-printed paper having many different types of fixed information, it is necessary to always prepare a considerable amount of each type of pre-printed paper. There is. Therefore, a large space is required to store the pre-printed paper, and inventory management and outsourcing management are also complicated.

B. The task of preparing and supplying the desired amount of pre-printed paper in the desired pattern and color to the printing machine is extremely labor-intensive and error-prone, which reduces the operating rate of the printing machine, i.e. the document creation speed. is low.

It has drawbacks such as.

The printing machines shown in Figures 1 to 4 above select fixed information specified on a series of printing sheets, which requires a large amount of fixed information, and quickly print this information at a predetermined location on the printing sheet. It is inappropriate for

The purpose of the present invention is to eliminate the drawbacks of the prior art as described above, and to select a plate having necessary fixed information from among a large number of plates prepared in advance on a series of printing sheets on which variable information has already been printed or printed. It is an object of the present invention to provide a lithographic printing machine suitable for quickly printing and processing information on a portion of printing paper specified by a selected plate.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration. That is, (a) a plurality of plate cylinders equipped with an automatic plate attachment/detachment mechanism, (b) a plurality of inking devices for supplying ink to the plurality of plate cylinders, and (c) the plurality of plate cylinders. (d) a plurality of automatic plate feeding/discharging means attached to each of the plate cylinders and automatically feeding/discharging plates to/from the plate cylinders; (d) press printing paper against the plurality of plate cylinders or a blanket cylinder in contact with the plurality of plate cylinders; (e) feeding means for feeding the printing paper between the impression cylinder and the plurality of plate cylinders or a blanket cylinder in contact with the plurality of plate cylinders; (f) the printing (g) a plurality of plate feeding tables for storing plates fed to the plate cylinder; and a reader for reading identification information of the printing paper provided on a paper feeding path; a plate storage shelf, which is integrated with at least one plate discharging table for storing printed plates, and in which the plate feeding table and the plate discharging table are supported so as to be connected to and detachable from the automatic plate supplying and discharging means; (H) A lithographic printer comprising: a control means for transmitting a control signal based on a pre-recorded control signal and a read signal from the reader to at least the plate cylinder, the automatic plate supply/discharge means, and the plate storage shelf; (i) The plurality of automatic plate feeding and discharging means are arranged within the range of movement of the plate storage shelves by connecting and disconnecting them, and arranged in the direction of movement of the plate storage shelves. It is a machine.

[Function] According to the present invention, the plate storage shelves included in the plurality of plate storage stands can be vertically connected to and disconnected from the automatic plate supply/discharge means. Here, when the reading signal from the reader is input to the control means, the control means gives an instruction to raise and lower the plate storage shelf, and the plate necessary for printing is placed on the plurality of plate storage racks. The plate feeding platform that is in use quickly stops at the desired position of the automatic plate feeding/discharging means.

Next, the plate placed on the plate feeding table of the plate storage shelf is sent out by a feed roller, and further fed to the plate cylinder by an automatic plate feeding/discharging means.

Further, when discharging the plate, the plate storage shelf is raised and lowered again in response to an instruction from the control means to the plate storage shelf, and the plate discharge table of the plate storage stands stops at the position of the automatic plate feeding/discharging means. Next, by an action opposite to the plate feeding action described above, the used plate is quickly recovered from the plate cylinder to the plate discharging table of the plate storage shelf.

At this time, the reader reads identification information from a printing paper on which identification information specifying the type of fixed information is printed, and generates a reading signal. Since this signal gives specific instructions for raising and lowering the plate storage shelves through the control means, selection and positioning of the plate storage racks for each of the automatic plate feeding and discharging means can be more reliably performed.

[Example] Further, the present invention will be explained in detail based on an example shown in the drawings.

Embodiment 1 FIG. 5 is a side view showing the main parts of a two-color offset printing machine for continuous paper according to the present invention.

In FIG. 5, 1a and 1b are plate cylinders, 2 is
Blanket cylinder, 3, impression cylinder, 14, plate storage shelf, 15, plate feeding table, 16a, 16b, plate discharging table, 19, frame, 20a, 20b, automatic plate feeding/discharging means, 21a, 21b 2 is an inking device, 22 is an automatic blanket cleaning device, and 23 is an inking device.
printing paper; 24 is a paper feeding tractor (paper feeding means);
26 is a folding device, 27 is a reader, 35
is a printing machine, and 40 is a control means.

The printing press 35 of the present invention includes a plurality of plate cylinders 1a, 1
b, a plurality of inking devices 21a, 21b, a plurality of automatic feed/discharge means 20a, 20b, an impression cylinder 3, a paper feed means 24, a reader 27, a plate storage shelf 14, a control means 4
0.

The plate cylinders 1a and 1b have an opening at a part of their circumference, like the plate cylinders of a sheet-fed lithographic printing press, and the opening has an illustration for gripping the front end of the plate to be wound around the plate cylinder. It is equipped with a detachable claw.

The blanket cylinder 2, which once records printing information on the plate cylinder and transfers it to the printing paper, may be of any type as long as it is capable of transferring ink.

The inking devices 21a, 21b include a plate cylinder 1a,
Any material that can supply ink to 1b may be used. In addition, the plate cylinders 1a and 1b can be loaded and unloaded freely.

The automatic plate feeding/discharging means 20a, 20b is a plate feeding section 28.
Consisting of a, 28b and plate discharge parts 29a, 29b,
It is configured to operate plate feeding and plate discharging as necessary, and works to attach or remove plates from the plate cylinders 1a and 1b, respectively, by interlocking the opening and closing operations of the plate cylinder attachment/detachment claws. .

The impression cylinder 3 may be any cylinder that can press the printing paper against a plate cylinder or a blanket cylinder in contact with the plate cylinder.

The above-mentioned blanket cylinder 2 has a fixed axis, and the plate cylinders 1a, 1b and impression cylinder 3 can be independently attached to and removed from the blanket cylinder 2. In addition, the blanket automatic cleaning device 22
Similarly to the plate cylinder, the cylinder can be attached to and detached from the blanket cylinder 2 at will.

The paper feeding means 24 can be a paper feed tractor, a pin feed tractor, or the like.

In addition, the above-mentioned plate cylinders 1a, 1b, inking devices 21a, 21b, automatic plate feeding/discharging means 20a, 20
b, the impression cylinder 3, and the paper feeding means 24, all of which are known, for example, those disclosed in Japanese Utility Model Publication No. 54-3761 can be used.

The reader 27 may be of any type capable of reading the identification information provided on the printed paper 23 being fed, for example a coded hole or cutout. ,or,
It is possible to use a device that optically detects identification information provided on printing paper, such as printed symbols.

The plate storage shelf 14 includes a plurality of plate feeding tables 15 for storing plates fed to the plate cylinder, and at least one plate discharging table 16a or 16b (not shown in the drawing) for storing plates discharged from the plate cylinder. Although two plate discharging tables are shown in the figure, either one of them may be used. Means 2
It is supported so that it can be connected to and separated from 0a or 20b.

Note that the plate feeding table and the plate discharging table are opened on the automatic plate feeding and discharging means side. Furthermore, the above-mentioned "coupling" refers to a state in which one of the plate feeding tables or plate discharging tables and one of the automatic plate feeding/discharging means are facing each other, making it possible to transfer plates. This refers to the state in which the plate feeding table or the plate discharging table is separated from each other by raising and lowering the plate storage shelf 14 from the state where they are facing each other.

Such connection and separation of the plate storage shelves 14 is achieved by raising and lowering the plate storage shelves 14 along guide rails (not shown) provided on the side surfaces of the frame 19. Incidentally, the plate storage shelf 14 can be raised and lowered by using any known means.

In addition, the plate storage shelf 14 moves up and down in a range indicated by a lower limit position 14a and an upper limit position 14b indicated by a two-dot chain line along a guide rail (not shown) provided on the side surface of the frame 19, and moves up and down to any arbitrary position along the way. The machine is positioned at the position and can be stopped at that position.

This positioning is the position where each plate feeding table 15 and each automatic plate feeding section 28a, 28b are connected, or the position where the two plate discharging tables 16a, 16b and the automatic plate discharging section 29 are connected.
a and 29b are connected at the same time. The latter method is the most preferable, since it is possible to discharge the plates from two plate cylinders at the same time.

Note that the range indicated by the lower limit position 14a and the upper limit position 14b indicated by the two-dot chain line is the plate storage shelf 14.
Within this moving range, the automatic plate feeding/discharging means 20a, 20b are arranged in the moving direction.

The plate storage shelf 14 is connected to and disconnected from automatic plate feeding units 28a, 28b and automatic plate discharging units 29a, 29b,
In other words, in order to be able to approach and move away freely, and to make it easy to replenish the plate feeding table with plates and remove unnecessary plates from the plate discharging table, the rails (not shown) provided on the frame 19 are perpendicular to each other. It is convenient to keep it mobile.

In some cases, the plate storage shelf 14 may be of a cassette type, and the plate storage shelf itself may be replaceable. Furthermore, if a plurality of plate storage shelves 14 are installed in parallel and the shelves can be arbitrarily selected, more plate feeding tables can be prepared. In this way, by raising and lowering the plate storage shelf 14, any plate feeding table 15 can be placed.
It is possible to supply and mount a plate on any plate cylinder via any automatic plate supply sections 28a, 28b.

It is also possible to stack and store a plurality of plates on the plate feeding table 15, and the feed roller 17 feeds out only one plate of the stacked plates from the top, facing one of the plate feeding tables. Plate feeding section 28a or 2
It is now ready to be sent to 8b.

Further, a feed roller 1 is also provided on the plate discharge tables 16a and 16b.
8 is provided, and the plate discharged from the plate discharge unit 29a or 29b is transferred to the plate discharge table 16a or 16b.
The structure allows multiple sheets to be stored by stacking them one after another.

Next, a series of operations of the plate storage shelf 14 from when plates are fed from the plate storage shelf 14 to when printing is completed and the plates are discharged will be explained.

First, when one of the plate feeding tables 15 is positioned, for example, at a position facing the plate feeding section 28a, the plate feeding section 28a and the plate feeding table 15 are
They are connected at the same height, and the plate storage shelf 14
A plate feeding path of the plate from the plate feeding means 28a to the automatic plate feeding means 28a is achieved.

Next, when printing on the plate cylinder 1a is finished, the plate storage shelf 14 moves up and down again, so that the plate feeding table 15 is separated from the plate feeding section 28a, and one of the two plate discharging tables 16, For example, the plate discharging table 16a is the plate discharging unit 29.
Stop at a position opposite to a. Here, the plate discharge table 16
a and the plate discharge unit 29a are connected at the same height, and the automatic plate discharge means 29a is connected to the plate storage shelf 14.
The ejection path to is achieved.

In this way, the plate storage shelf 14 is raised and lowered every time printing is completed on the plate cylinders 1a and 1b, and is connected to the plate discharge section 29a or 29b, so that the plurality of discharged plates are sequentially placed on the plate discharge table 16a or 16b. It will be collected.

The control means 40 transmits control signals based on prerecorded control signals and signals read by the reader to at least the plate cylinder, the automatic plate supply/discharge means, and the plate storage shelf.

A known microcomputer can be used as the control means 40. Specifically, it is equipped with a well-known microcomputer commonly used in automatic machine tools, etc., and has a memory and calculation section, an input/output interface section, and a power supply section as its basic components. . In this embodiment, an 8-bit microcomputer is used as the control means 40.

Sequence control of the entire lithographic printing press is also performed via three input/output interface units, an input control unit, an output control unit, and an operation panel control unit, which are built into the microcomputer.

The plate used in this embodiment described above is generally called a waterless lithographic plate. Therefore, this lithographic printing press is not provided with a dampening water device. For example, the waterless planographic plate is
A urethane-based photosensitive resin and silicone rubber that repel printing ink are laminated in this order on a polyester film base. When a positive type film base plate is layered on top of this and exposed, the resin in the exposed non-image areas is is photopolymerized and adheres to the silicone rubber, and the swollen portion of the resin in the unexposed image area is peeled off by treatment with a petroleum solvent after exposure, forming a recess on which the printing ink is placed. In addition, it is of course possible to use a water-filled lithographic plate, such as a PS plate (pre-photosensitive plate), which has a photosensitive layer and a hydrophilic layer, instead of a waterless lithographic plate. It is necessary to add a water device.

Next, using FIG. 5, switching of the fixed information of the lithographic printing press 35 of this embodiment, that is, a plate switching operation in which a plate containing desired fixed information is fed to and ejected from the plate cylinders 1a and 1b. I will explain about it.

First, plates each recording different types of fixed information are placed on each plate feeding table 15, and a plurality of plates each recording the same type of fixed information are stacked and placed on the same plate feeding table 15. .

In this case, it is determined in advance by the above-mentioned operation which plate feeding platform 15 is loaded with a plate containing which type of fixed information, or what color of ink is set in each inking device 21a, 21b. Inputs are made to the control means 40 from the panel.

When printing with the plates mounted on the plate cylinders 1a and 1b is completed, the impression cylinder 3 separates from the blanket cylinder 2, the paper feed tractor 24 is stopped, and the printing paper 23 is stopped. Then, the plate cylinders 1a, 1b are separated from the blanket cylinder 2, and the inking device 21
a and 21b are also separated from the plate cylinders 1a and 1b, respectively.

Next, in response to an elevating command from the control means 40 to the plate storage shelf 14, the plate storage shelf 14 is raised and lowered, and the plate discharge table 16 is moved up and down.
a or 16b stops at a position facing the plate discharge section 29a or 29b.

After that, the feed roller 18 rotates counterclockwise, and the plate discharge table 16a or 16 is moved from the plate cylinders 1a, 1b.
The plate that has been ejected on b is transferred to the ejection table 16a or 16.
Store it correctly in the correct position b.

Meanwhile, during this period, the blanket automatic cleaning device 22
is deposited on the blanket cylinder 2 and comes into contact with it, and the ink on the blanket cylinder is removed by washing.

Next, when printing is to be restarted on the plate cylinder 1a, the plate storage shelf 14 is moved to the plate feeding table 1 storing the plates to be mounted on the plate cylinder 1a in accordance with a lifting/lowering command from the control means 40.
5 moves up and down to a position facing the plate feeding section 28a and stops. Next, the feed roller 17 of this plate feeding table 15
rotates clockwise and transfers only one plate to the plate feeding section 28a. When the plate cylinder 1a has rotated counterclockwise to a predetermined phase, the attachment/detachment pawl is opened, and the leading end of the plate enters the opened attachment/detachment pawl. When the plate cylinder 1a further rotates and reaches a predetermined phase, the attachment/detachment claw closes and the leading end of the plate is fixed, completing the attachment of the plate to the outer periphery of the plate cylinder 1a.

Next, a plate is attached to the plate cylinder 1b by a similar operation. When the automatic blanket cleaning device 22 finishes cleaning, it separates from the blanket cylinder 2 again and stands by.

When the plate replacement is completed in this way, the inking devices 21a and 21b are attached to the plate cylinders 1a and 1b, and then the plate cylinders 1a and 1b are attached to the blanket cylinder 2, and the printing is recorded on the plate surface on the plate cylinder. The fixed information is transferred onto the blanket cylinder 2. Next, the paper feed tractor 24 and the paper discharge roller 25 are driven, and after the printing paper 23 is fed, the impression cylinder 3 is moved to the printing paper 23.
3 to the blanket cylinder 2, and printing is started.

The lithographic printing press shown in this embodiment has the above-mentioned configuration, so that a plurality of plate feeding tables 15, which were conventionally provided for each plate cylinder, can be arranged in parallel on one common plate storage shelf 14. In addition, since the plate storage shelf 14 can be freely connected to and detached from each plate cylinder, it is possible to freely select a plate containing arbitrary information from among a large number of fixed information for printing paper and feed the plate. Furthermore, when discharging a plate, it is possible to handle multiple plate discharging units.
This has the excellent effect of making it possible to handle complex printing information and achieving a significant improvement in printing efficiency.

The fixed information switching method in the lithographic printing machine shown in FIG. Among the plate cylinders 1a and 1b, the plate cylinder to be mounted on the blanket cylinder 2 is selected by a command from the control means 40 to perform monochrome printing (including the case where only the inking devices 21a and 21 are replaced).
(Prepare ink of the same or different color for b)
For example, the plate cylinders 1a and 1b are equipped with plates on which the same type of fixed information is recorded, and the plate cylinder to be used is selected by a command from the control means 40 to perform only color switching.

An appropriate method can be selected from these methods depending on the purpose.

Embodiment 2 Next, FIG. 6 is a side view of an embodiment of the present invention in which a lithographic series three-color printing press is used instead of the printing press 35 shown in FIG. 1.

The lithographic printing press 35 shown in FIG.
a, 1b, 1c and three impression cylinders 3a, 3b, 3c
Each plate cylinder is provided with automatic plate feeding/discharging means 20a, 20b, 20c and inking devices 21a, 21b, 21c, which have the same mechanism as the lithographic printing machine shown in FIG. The plate cylinders 1a, 1b, 1c have fixed axes, unlike the case shown in FIG.
It is rotatably supported on the shaft. In addition, the impression cylinder 3a,
3b and 3c have a mechanism that moves slightly as in the case of FIG. 5, and are configured to freely load and unload each plate cylinder.

As in FIG.
Paper is fed towards 6. The plate storage shelf 14 also has the same configuration as the lithographic printing machine shown in FIG. 5, and can be moved up and down to any arbitrary position between the position 14a and the position 14b along the right side of the frame 19, and can be stopped. The three plate discharge parts 29a, 29
Three plate discharge tables 16 connected simultaneously with b and 29c
a, 16b, and 16c are provided. That is, the vertical distance between each of the master discharge units 29a, 29b, and 29c is equal to the vertical distance between each of the master discharge tables 16a, 16b, and 16c. 14 plate feeding tables 1
Similarly to the lithographic printing press shown in FIG. 5, a plurality of plates can be stored in each of the five and three plate discharge tables 16a, 16b, and 16c.

The lithographic printing machine shown in Fig. 6 uses the same procedure for switching the type of fixed information as the lithographic printing machine shown in Fig. 5, except that it does not require a blanket cylinder or automatic blanket cleaning device because of direct printing. It is.

In addition, the method for switching the type of fixed information is almost the same, but according to this embodiment, it is possible to select three-color printing or three-color printing, it is possible to select single-color printing or two-color printing, and since there is no blanket, it is possible to select the plate cylinder to be used. The fifth point is that when selectively printing, there is almost no wasted time due to switching between plate cylinders, and therefore, in extreme cases, it is possible to efficiently print three different types of fixed information alternately on each page. It is superior to the lithographic printing machine shown in the figure.

Next, an application example of the lithographic printing press according to the present invention will be explained using FIG. 7 and FIG. 8.

FIG. 7 is a block diagram showing the concept of using an information processing device such as a computer in combination with the lithographic printing press according to the present invention, and FIG. It is a perspective view showing an example.

In the figure, 30 is an information processing device such as a computer, and the information processing device 30 is provided with identification information specifying variable information to be printed on each page of printing paper and fixed information to be printed on that page. Once input, this information is encoded as a combination of, for example, four digit numbers and output.

This output, that is, the coded variation information and identification information are stored on the magnetic tape 31 of the external storage device.
is stored once. 34 is a generator 32 for generating characters, symbols, figures, etc., which has a reproducing mechanism for the magnetic tape 31;
(hereinafter simply referred to as a character generating section 32) and a printing section 33. When the magnetic tape 31 is placed in the character generating section 32 and reproduced, a font corresponding to the variable information and identification information code is printed. (a graphic pattern consisting of many small dots) is output to the print section 33. The printing unit 33 receives the above output from the character generating unit 32 and prints a long first image being fed in the direction of the arrow.
Printing of variable information on a predetermined portion of a predetermined page of the subsequent printing paper 23a and recording of identification information specifying the type of fixed information to be reprinted later on that page are performed.

A second step after printing variable information for a predetermined portion of a predetermined page and recording identification information specifying the type of fixed information to be printed later on that page.
The next printing paper 23b is then fed to a lithographic printing machine 35 for printing fixed information. Note that in this embodiment, the feeding direction of the secondary printing paper 23b is the same as that of the primary printing paper 23a with respect to the printer 34.
It is set in the same direction as the direction in which it was fed. The lithographic printing machine 35 shown in FIGS. 5 and 6 is used, and the second printing paper 23 shown in FIGS.
paper feed tractor 24 and paper ejection roller 25, which are means for feeding paper b, and secondary printing paper 2 to be fed.
A reader 27 is provided to read the above-mentioned identification information of plate storage shelf 14, and a reading signal sent from the reader 27 is inputted to the control means 40, and the control signal output from the control means 40 causes the plates to be prepared in the plate storage shelf 14. Select fixed information (type of plate, combination of plates, color of printing ink) that corresponds to the identification information from among multiple types of fixed information, and use the selected fixed information as the second fixed information.
This is to be printed on the next printing paper 23b.

For example, as shown in FIG. 8, the identification information is recorded on the printing paper by the printer on the secondary printing paper 23.
This is done by providing a bar code 38 outside the row of sprocket holes 36 of b and at the beginning of the page separated by perforations 37.

If it is necessary to record a plurality of pieces of identification information for purposes such as multicolor printing, the identification information is recorded at a location different from the barcode 38, such as the barcode 39. . However, it is also possible to include the identification information represented by barcode 39 in barcode 38 by increasing the number of bits in barcode 38. Note that if the printer 34 has a punching mechanism, this identification information can also be recorded as a coded hole or notch.

In the lithographic printing press shown in FIGS. 5 and 6, only two or three colors can be printed in one page. Therefore, if you need to print in more colors than this,
The printed paper 23c is passed through the lithographic printing machine again in the same direction as the second printing paper 23b, and a color different from that of the previous printing is superimposed and printed. In this case, the type of plate and color of printing ink will be specified in the second step.
This is done by reading the barcode 39 (FIG. 8) on the next printing paper 23b.

If there are pages that do not need to be printed, the impression cylinders 3, 3a, 3b, 3c are separated from the blanket cylinder 2 or plate cylinders 1a, 1b, 1c in FIG. 5 or 6, and then the paper feed tractor 24 and The printing paper is only fed by the paper discharge roller 25. Such printing paper feeding can also be used for the purpose of performing multicolor printing only on specific pages. For example, in the lithographic printing machine shown in Fig. 5, if all pages are to be printed in two colors, and the type of fixed information on each page is different, that is, the plate used is different, the first printing is performed every other page, If fixed information is given in advance using a barcode so that the remaining pages are printed in the second printing, the color of the printing ink and the printing plate can be changed only between the first printing and the second printing. It only needs to be done once, which is extremely advantageous in terms of improving printing efficiency and reducing plate material costs.

As described above, according to the embodiment shown in FIG. 7, the process from inputting fixed information to the lithographic printing machine 35 to execution of printing can be performed extremely reliably and automatically. Since the identification information is recorded on the secondary printing paper 23b itself, there is no confusion of information even when the paper is temporarily stocked before printing or when a plurality of lithographic printing machines 35 are used. This is particularly effective when the type of fixed information changes in small lots, or in extreme cases when it changes alternately every page. Since the primary printing paper 23a supplied to the printer 34 is blank, it is possible to keep various types of pre-printed paper in stock or to use them, unlike the conventional technique of using pre-printed paper, that is, printing paper with fixed parts printed in advance. There is no need to sort and feed it to the printing machine.

Therefore, the embodiment shown in FIG. 7 can be said to be an example in which the features of the lithographic printing press 35 having the configuration shown in FIGS. 5 and 6 can be best exhibited.

In Figure 7, we explained a particularly highly automated method of use, but if you change the microcomputer software according to the purpose, you can use the lithographic printing machine shown in Figures 5 and 6 even in the simple case of usage as shown below. 35 is sufficiently useful compared to conventional lithographic printing machines.

A desired plate is arbitrarily selected from among a large number of plates in the plate storage shelf 14 by manually inputting identification information.

A predetermined sequence (the order and combination of plates to be used, and the number of sheets of fixed information printed by each plate) is stored in the control means 40, and the switching is performed.

All of the above explanations have been made with respect to a lithographic printing machine that uses continuous paper, but if a known sheet feeding mechanism is attached to the lithographic printing machine according to the present invention, sheet feeding mechanisms can be used. Needless to say, printing can be easily performed.

[Effects of the Invention] As detailed above, the lithographic printing press according to the present invention replaces the plate feeding table, which was conventionally provided for each plate cylinder, with multiple stages in one common plate storage shelf. control means for the plate storage shelves;
Since the identification information reader is provided, it is easy to connect, disconnect, and position the plate storage shelf to each automatic plate feeding means, and any plate can be easily selected from among a plurality of plates having a large number of fixed information. You can supply the plate.

Furthermore, when discharging plates, at least one plate discharging table is provided in the plate storage shelf, so that after printing is completed, the control means and the plate storage shelf can be freely connected to and disconnected from each automatic plate discharging means. Easily removes plates from within the plate storage shelf.

Therefore, according to the present invention, compared to conventional apparatuses, it is possible to print corresponding to a large number of complex printing information,
This has an excellent effect that allows for a significant improvement in printing efficiency.

[Brief explanation of drawings]

1 to 4 are model diagrams of the main parts of a known lithographic printing machine. 5 and 6 are side views of the main parts of the lithographic printing press according to the present invention. FIG. 7 is a block diagram showing the concept of using the lithographic printing press according to the present invention in conjunction with an information processing device. 8th
The figure is a perspective view showing an example of printing paper used in the lithographic printing machine according to the present invention. Explanation of symbols in the drawings: 1: plate cylinder, 2: blanket cylinder, 3: impression cylinder, 4: paper path, 14: plate storage shelf, 15: plate feeding table, 16: plate discharge table, 19: frame, 20: Automatic plate feeding/discharging means, 21: Inking device, 23: Printing paper, 24: Paper feeding tractor, 2
7: Reader, 30: Information processing device, 34: Printer, 35: Printing machine, 40: Control means.

Claims (1)

[Scope of Claims] 1. (a) A plurality of plate cylinders equipped with an automatic plate attachment/detachment mechanism; (b) a plurality of inking devices for supplying ink to each of the plurality of plate cylinders; and (c) a plurality of automatic plate feeding and discharging means that are attached to each of the plurality of plate cylinders and that automatically feed and discharge plates to and from the plate cylinders; (d) a plurality of plate cylinders or a blanket cylinder that is in contact with the plurality of plate cylinders; , an impression cylinder that presses the printing paper; (e) a paper feeding means that feeds the printing paper between the impression cylinder and the plurality of plate cylinders or a blanket cylinder that is in contact with the plurality of plate cylinders; (f) a reader for reading identification information of the printing paper provided on the feeding path of the printing paper; (g) a plurality of plate feeding stands for storing plates to be fed to the plate cylinder; At least one plate discharge table for storing the plate discharged from the plate cylinder is integrated, and the plate supply table and the plate discharge table are supported so as to be connected to and detachable from the automatic plate supply and discharge means. a plate storage shelf; (h) a control means for transmitting a control signal based on a prerecorded control signal and a read signal of the reader to at least the plate cylinder, the automatic plate supply/discharge means, and the plate storage shelf; (i) The plurality of automatic plate feeding and discharging means are within the range of movement of the plate storage shelves due to connection and disconnection, and in the direction of movement of the plate storage shelves. Arrayed lithographic printing presses.