JPS6399945A - Table-type lithographic printer and printing method - Google Patents

Abstract

PURPOSE:To enable multi-color printing and obtain stable-quality printed matter by providing a printing-sheet-quantity setting device, a blanket washing device, an ink washing device and an ink supply unit additionally. CONSTITUTION:A pedestal 30 is caused to shuttle back and forth normally 10 20 times for warming-up operation, and the number of printing sheets is freely set and inputted after said operation. Following the setting of the number of printing sheets, the sheets are supplied from a paper feeder 5 by pressing an operating button ON, and a material to be printed which is on a surface plate 3 is printed. A blanket 31 is washed by a blanket washing device 6 provided on a frame 1 of the title printer, and for ink washing, the pedestal 30 is caused to stop at a rear limit, and an ink roller 33 on the pedestal 30 and an inking device on the frame 1 of the printer, i.e. ink fountain roller and rocking roller 24, is washed. For ink change, first a doctor 43 of ink washing device 40 is detached from the rocking roller 24, then ink in the next color is selected and a selector button is pressed. Thus an ink unit 20 moves and is locked and fixed with the selected color ink.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (Industrial Field of Application) The present invention relates to a flatbed lithographic printing machine and printing method capable of multicolor printing, and furthermore to a proofing machine.

The present invention relates to a flatbed lithographic printing machine that can also be used as a printing machine for actual printing, and a printing method.

(Prior art) Before the actual printing called 9-printing in plate-making printing work, proof printing is performed to inspect the printing plate obtained by plate-making and to obtain a standard print for the actual printing. is commonly done.

Since this proof print is an inspection of one print, it is desirable that it be printed under conditions similar to those of two prints.In other words, it is better to perform the proof print using the printing machine used for the main print, but it is better to print the proof print using the printing machine used for the main print. The machine is not designed to be convenient for printing a small number of copies, such as one proof printing, and for reasons such as efficient operation of the printing press, nine proof printing is performed by a printing machine for nine proof printing, that is, a proofing machine. There is.

Furthermore, even if it is not a proof print but a 9-print, the small number of copies is 9.
For example, when printing 500 copies or less, it is not economical to operate a single printing press.

Printing is done by a proofing machine.

A proofing machine generally consists of a pedestal containing an ink roller, a water roller, and a blanket cylinder, a three-plate surface plate, a paper surface plate, a dampening water device at both ends, and an oscillating roller (for applying ink to the inking device or ink roller). Printing is performed by running the printer on a main body frame equipped with rider rollers.

Flatbed lithographic printing machines, such as proofing machines, generally print a single color, i.e. one
When performing color printing, which is multicolor printing,
First, after printing the first color, stop the printing machine,
After cleaning, start printing the second color.

By repeating this process for the required number of colors, multicolor printing can be achieved.

Therefore, multicolor printing using a flatbed lithographic printing machine such as a 5 proofing machine requires nine hours and a considerable amount of labor, and the reality is that it is not possible to obtain multicolor prints quickly and easily.

Incidentally, there are also known attempts to perform multicolor printing using a flatbed lithographic printing machine without stopping the printing machine in the middle, for example,
The printing machine disclosed in Japanese Unexamined Patent Publication No. 134209/1983 performs multicolor printing using an inking device and a plate plate corresponding to the number of nine colors. . It is true that this printing press may be able to print in multiple colors, but since many of the components of the printing press are divided into parts corresponding to the number of colors, not only does the device configuration tend to become complicated.

Furthermore, if the size of the printing material is large, a very large printing machine will be required.Therefore, although it may be good for printing a relatively small printing material of 9 areas, for a printing material with a large area. I haven't passed it.

In addition, flatbed lithographic printing machines such as 2-proofing machines often require one person to perform tasks such as supplying ink.

In order to apply ink to the ink roller, the ink is manually applied to this ink roller and other rollers, that is, the ink is evenly applied by hand. In other words, by applying ink with a spatula, ink supply, replenishment,
Also, the ink film thickness on the rollers is adjusted. This means that the management of the amount of ink supplied to the ink roller relies on the experience of 9 workers. Therefore, in order to obtain stable printed matter of 2 degrees of quality per amount of ink, skill is required. Furthermore, work errors are likely to occur before the printed matter is printed with a constant amount of ink, and the efficiency of the second work is also poor.

Note that proofing machines equipped with an inking device are also known, but since this inking device is similar to a single-print printing machine, if it is attached to a conventional proofing machine, it will not work as an inking device. Requires expensive equipment to be installed.

Furthermore, in most flatbed lithographic printing machines, feeding and discharging of printing materials is generally done manually, which is not an easy task and requires a lot of effort when printing a considerable number of copies. Furthermore, registration during paper feeding, which is the feeding of the printing medium, is also performed manually.

(Problems to be Solved by the Invention) In view of the above, the present invention is a flatbed lithographic printing machine that is generally used as a single proofing machine or a small quantity printing machine, which enables multi-color printing, and further improves printing efficiency. The present invention provides a flatbed lithographic multicolor printing machine that can produce stable printed matter of two qualities by automating the process, and a printing machine that can produce stable and uniform printed matter of one quality even by unskilled workers. provide a method. It also provides a printing machine or method that can produce multicolor printed matter faster than conventional flatbed lithographic printing machines.

"Structure of the Invention" (Means for Solving the Problems) The present invention provides a platform including an ink roller, a water roller, and a blanket, a 9-plate surface plate, a paper surface plate, and a dampening water device and an inking device at both ends. In a flatbed lithographic printing machine that runs on a main body frame provided.

Device for setting the number of prints.

A blanket cleaning device installed in one main body frame that cleans the blanket on the stand after printing the specified number of colors.

Clean the ink roller on the pedestal and the inking device on the main body frame. An ink cleaning device including a cleaning oil supply section provided on a pedestal and a scraping lid lid provided on a main body frame.

A plurality of ink supply members each having an ink fountain, such as an ink supply member which is a pair of ink mixing rollers, which are two rollers that rotate in opposite directions and have an ink fountain between the rollers, are provided depending on the number of colors. Furthermore, it has a feeding roller that transfers the ink kneaded by the ink mixing roller to the swinging roller of the main body frame, so that when one color is changed, the next ink supply member can supply ink to the inking device of the main body frame. A moving ink supply unit.

It is a flatbed lithographic printing machine including.

Furthermore, in a flatbed planographic printing method in which a frame including an ink roller, a water roller, and a blanket is run on a main body frame having a first plate surface plate, a paper surface plate, and a dampening water device and an inking device at both ends. .

(b) Set the number of prints using the setting device.

(b) After printing a set number of prints, the pedestal is moved onto a blanket cleaning device provided on the main body frame, and the blanket on the pedestal is cleaned.

(c) Move the pedestal onto the inking device of the main body frame, and ink the ink roller of the pedestal and the main frame using the cleaning oil supply section provided on the pedestal and the ink cleaning device of the scraping doctor provided on the main body frame. Clean the equipment.

(d) It is two rollers that rotate in opposite directions.

and has a plurality of ink supply members each having an ink fountain according to the number of colors, such as an ink supply member having an ink fountain between the rollers, and a pair of ink mixing rollers having an ink fountain between the rollers; The next ink supply member of the ink supply unit, which has a feed roller that transfers to the swinging roller of the frame, is moved so that it can supply ink to the inking device of the main body frame.

(E) If necessary, supply ink to the inking device, move the pedestal onto the dampening device, supply water to the water roller, and move the pedestal back and forth on the 5th plate for watering. Prepare for printing by supplying ink to the first plate, bringing the blanket into contact with the plate, and registering by making a test print.

(f) Repeat the above steps (b) or (e) depending on the number of colors.

The present invention relates to a printing method including.

9 Hereinafter, one embodiment of the present invention will be explained with reference to drawings. Figure 1 is a side view showing an outline of the flatbed lithographic multicolor printing machine of the present invention. 0 Dampening water is provided at both ends of the main body frame 1.
An apparatus 10 and an ink supply unit 20 are installed, and a pedestal 30 including a blanket 31 (usually a blanket is provided on a blanket cylinder), a water roller (Molton roller) 32 and an ink roller 33 is installed on the main body frame 1. There is a plate surface plate 2 on the body frame 1 on which the machine runs.
and a paper surface plate 3 are provided. A printing plate to be printed is mounted on the plate surface plate 2, a material to be printed is mounted on the paper surface plate 13, and the mount 30 is moved back and forth on the main body frame 1 to apply dampening water and ink to the printing plate. The ink on the printing plate is transferred to the printing material via the blanket 30 to perform printing.
A water basin 4 is provided on the main body frame l.

From the viewpoint of automation, it is preferable to install the supply and discharge of the printing medium. The feeding device 5 for printing materials is provided on the main body frame 1, and the discharging device 34 for printing materials is provided on the pedestal 30.

Next, one printing machine and method of the present invention will be explained while showing the operating procedure.

The outline of the operation is as follows: 1. Preparation, 2. Warming up, 3. Printing, 4. Blanket cleaning, 5° ink cleaning, 6. Ink replacement, 7. Each operation will be explained in order, consisting of repeating. In addition, 1. Preparation.

2. Warming-up is also performed in conventional flatbed lithographic printing machines9.

Preparation 1 includes preparing dampening water and ink. Even if multicolor printing is to be performed, this preparatory work is only performed once.

1-1 (Mountain water) When starting the printing machine.

The mount 30 starts the dampening water, senses the temperature, humidity, dampening water temperature, etc. of the printing room, and supplies the dampening water to the water roller 32 by arbitrarily changing the setting timer. is fixed at the printing press front (dampening side) and dampening water is supplied. After the supply of dampening water for the set time has ended, the rollers on the pedestal side, such as the water roller 32, are turned off by the air cylinder, and the water source roller 11 is idle.

1-2 (Ink) The pedestal 30 is fixed to the rear end of the printing press (on the inking device side). Select the ink color.

By turning on the selection button switch, the ink supply 20 is raised or lowered to the corresponding color, and is stopped and locked by sensor detection. Note that the ink supply unit 20 has one fixed position, which is detected by a sensor and locked.

By a timer that can be set arbitrarily, ink is supplied from the calling ink fountain 21 side to the calling roller (not shown) on the main body side and the ink roller 33 of the gantry 30, and the number of calling times can also be set arbitrarily. After that, the calling operation stops and the ink preparation ends.

In the drawing, each unit of the ink supply unit 20 is
The book rollers (ink mixing rollers) are shown as 22 and 23, and the ink fountain 21 is shown between the rollers 22 and 23. The number of rollers in each unit is not limited to this, and may also be one using an ink fountain like a general printing machine, that is, a plate, etc.
The ink supply member shown in the drawings can supply ink with a relatively simple device and stir the ink, so it also has the effect of preventing the ink film from drying out.

Next 2. Explain about warming up.

This warming-up supplies ink and dampening water to the printing plate after the preparation work is completed.

2-1 (Mountain water) Only the water roller 32 is wet.

Supply dampening water onto the printing plate an arbitrary number of times. After completing the set number of times, the pedestal 30 stops on the rear floor.

2-2 (Ink) After the supply of dampening water is finished, the water roller 32
Then, the ink roller 33 is applied and supplies ink to the printing plate provided on the first plate surface plate 2. After completing the set number of times, the pedestal 30 stops on the rear floor.

2-3 (Blanket) After the ink supply is finished,
Water roller 32. The ink roller 33 and the blanket 31 provided on the blanket cylinder are coated, and streaks are formed on the blanket at an arbitrary set number of times. After completing the set number of times, the pedestal 30 stops in its original position.

Note 1. The pedestal 30 is normally moved back and forth 10 to 20 times by the warming amplifier.

3. Explain about printing. After warming up, set and input the number of prints as desired. In addition, during this time (
(during input) stops the pedestal 30 as necessary,
It is also possible to perform standby operation. In addition.

In the standby operation, the frame 30 is moved from the rear end to the front end, and in the front end, the water roller 32 is repeatedly attached and detached under arbitrary timer control to stabilize the water on the water roller 32.

3-1 After setting the number of sheets to be printed, turn on the operation button to print on the printing material supplied from the paper feeding device 5 and placed on the paper platen 3. The first printed matter is taken out by depressing the Hund pedal, and the quality of the printed matter is determined. That is, if an automatic paper ejecting device is provided for the first printed sheet, the paper will not be automatically ejected.

The printing of the second and subsequent sheets is divided into either 3-2 or 3-3 below.

3-2 (When registration is not performed, that is, the first color) Turn on the operation button to print the remaining set number of sheets. Note that for paper feeding and paper ejection, the pedestal 30 faces the precursor, and the paper feeding device 5
After passing, it is preferable that the paper is automatically fed, and immediately after the mount 30 passes the nine-sheet surface plate 3 toward the rear end, the paper is automatically ejected.

3-3 (When performing registration, that is, after the second color) Register is performed again by inputting the misregistration of the first printed matter into the automatic registration device and turning on the registration button. This operation is continued until registration is achieved. After registration is completed, turn on the operation button to print the remaining set number of sheets.

4. Blanket cleaning: 1. The blanket cleaning device 6 provided on the main body frame 1 cleans the blanket 31. The blanket cleaning device 6 is not particularly limited as long as it is a conventionally known device that can be attached. For example, those using a brush, those using cloth, etc. The platform 30 is moved to the front drive and locked so that it does not run.

5. To wash the ink, release the travel lock and move the mount 3 to the rear end.
0, and the ink cleaning device cleans the ink roller 33 of the pedestal 30 and the inking device of the main body frame 1.
That is, the calling roller and the swinging roller 24 are cleaned. Figure 2 shows an example of an ink cleaning device.
A perspective view is shown.

The ink cleaning device 40 in FIG. 2 includes a cleaning oil supply section 41, a running belt 42. Washing oil tank 43. The cleaning oil supply section 41 consists of two spray devices, and the cleaning oil supply section 41 runs while spraying the ink rollers rotating once from the printing machine operation side, that is, the A side, to the B side and the rollers of the main body frame. It moves along the belt 42. Next, a doctor 43 (shown in FIG. 1) is attached to the swinging roller 24 using an air cylinder using a timer set arbitrarily in advance. Ink is scraped off by this doctor 43.

6.0 For ink replacement, use the doctor 4 of the ink cleaning device 40.
3 is removed from the swinging roller 24, the primary color ink is selected, and the 2 selection button is pressed.

The ink unit moves and is locked and fixed with ink of the specified color.

Ink is supplied to the printing press body from the ink unit whose calling roller has been replaced by a timer that can be set arbitrarily. After the set number of times is completed, the calling operation stops.
4. Note that this ink replacement may be performed 9 times for the first color as well.

Repeating step 7 is usually 9 times as described in step 2 above. The process is repeated and printing is performed using the next color of ink.

The above is an example of the operation using the flatbed lithographic printing machine of the present invention. In the above explanation, each operation was explained individually,
From the point of view of automation, it is preferable to automate everything except the inspection part so that each individual operation can be printed without the intervention of a single person. In other words, it is preferable to use an automated method in which the operation is preset using an operation button at the beginning, so that there is no need to perform any operations other than inspection during the intermediate steps.

Although the flatbed lithographic printing machine of the present invention is particularly effective for multicolor printing, it can of course also be used for printing with only one color.

"Effects of the Invention" The present invention not only improves the speed by about 1.5 times compared to printing in four colors using a conventional proof printing machine, but also provides printed matter with a more stable quality. It has the advantage that it can be printed without having to read it.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an outline of the flatbed lithographic printing machine of the present invention;
FIG. 2 is a perspective view of the ink cleaning device according to the present invention. The main symbols in FIG. 6 - Blanket cleaning device, 10 - Dampening water device, 20 - Ink supply unit, 30 - Frame, 40 - Ink cleaning device.

Claims (1)

[Claims] 1. A frame including an ink roller, a water roller, and a blanket is run on a main body frame provided with a plate surface plate, a paper surface plate, and a dampening water device and an inking device at both ends. In a flatbed lithographic printing machine, there is a device for setting the number of sheets to be printed, a blanket cleaning device installed on the main body frame that cleans the blanket on the stand after printing a specified number of each color, an ink roller on the stand and inking on the main frame. It has a cleaning oil supply part installed on the pedestal and a scraping doctor ink cleaning device installed on the main body frame, which cleans the device, and a plurality of ink supply members each having an ink fountain according to the number of colors, and furthermore, the ink mixing device An ink supply unit that has a calling roller that transfers the ink kneaded by the roller to a swinging roller on the main body frame, and moves so that the next ink supply member can supply ink to the inking device on the main body frame when changing colors. , A flatbed lithographic printing press comprising: 2. The flatbed lithographic printing machine according to claim 1, wherein the ink supply members are two rollers rotating in opposite directions, and a pair of ink mixing rollers serving as an ink fountain between the rollers. 3. A flatbed lithographic printing machine according to claim 1 or 2, which is provided with a printing material supply device and a printing material discharge device after printing. 4. A flatbed planographic printing method in which a frame including an ink roller, a water roller, and a blanket is run on a main body frame provided with a plate plate, a paper plate, and a dampening water device and an inking device at both ends, (b) Set the number of prints using the setting device; (b) After printing the set number of sheets, move the pedestal onto a blanket cleaning device installed in the main body frame and wash the blanket on the pedestal; (c) mount is moved onto the inking device of the main body frame, and the ink roller of the mount and the inking device of the main body frame are cleaned by the cleaning oil supply section provided on the pedestal and the ink cleaning device of the scraping doctor provided on the main body frame. (d) The next ink supply unit has a plurality of ink supply members each having an ink fountain according to the number of colors, and further has a calling roller that transfers the ink kneaded by the ink mixing roller to the swinging roller of the main body frame. Move the ink supply member so that it can supply ink to the inking device on the main body frame. (e) If necessary, supply ink to the inking device, move the pedestal onto the dampening device, and Water is supplied to the plate, the pedestal is moved back and forth over the plate plate to level the plate, ink is supplied to the plate, the blanket is brought into contact with the plate, registration is performed by test printing, and preparations are made for printing. f) A printing method characterized by further repeating the above (b) to (e) depending on the number of colors. 5. The printing method according to claim 4, wherein the ink supply member is a pair of ink mixing rollers that rotate in opposite directions, and the ink fountain is formed between the rollers.