JPH08244332A - Printing plate engraving printer - Google Patents

Abstract

PURPOSE: To provide a low-cost printing plate engraving printer which can lightly conduct a perfecting print without a printing miss in a short time and has a small size and excellent ink transferrability. CONSTITUTION: A printing plate engraving printer 1 winds a master 22 which is stencil engraved on the outer periphery of a plate cylinder 7, supplies ink from the inner periphery of the cylinder 7, and pushes a sheet 56 to the master 22 to transfer the ink from the perforated holes of the master 22 to the sheet 56, thereby printing. The printer 1 comprises a plurality of ink supply means 8, 28 disposed in the cylinder 7, sheet feeders 4, 54 of the same number as that of the means 8, 28 to feed the sheet 56 to the master 22, and pushing members 9, 49 of the same number as that of the means 8, 28 to push the fed sheet 56 to the master 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-making printing apparatus for punching a master with a thermal head or the like for printing.
More specifically, it relates to a plate-making printing apparatus capable of double-sided printing and high-speed printing.

[0002]

2. Description of the Related Art A punched master is wound around the outer surface of a plate cylinder, ink is supplied from the inner surface of the plate cylinder, and the paper is pressed against the master to transfer the ink from the holes of the master to the paper. Plate-making printing apparatuses for printing are well known. The plate-making printing apparatus printed one sheet by one rotation of the plate cylinder.

By the way, with respect to recent printed matter, double-sided printing tends to increase for reasons such as paper saving and prevention of an increase in file storage space, and 7-8 of users who actually use a plate-making printing apparatus in the market. Split is printed on both sides.

When double-sided printing is performed using this plate-making printing apparatus, first, one-sided printing is performed, and then the single-sided printed sheet is taken out from the paper discharge section and the single-sided printing is completed on the sheet feed tray of the plate-making printing apparatus. The method was to set it inside out so that the side of the was the back side, and then print the remaining one side.

[0005]

In the above technique, the operator has to set the paper, which is printed on one side and is stacked in the paper discharge section, in the paper supply section, which is time-consuming and troublesome. Further, when the number of printed sheets is large, the paper becomes heavy and the work is difficult. In addition, when the paper is set in the paper feed unit, it is difficult to know in which direction the paper should be set so that the front surface and the back surface are correctly printed, and there is a problem that a printing error is likely to occur.

In the above technique, since only one sheet is printed by one rotation of the plate cylinder, in order to perform high-speed printing, it is necessary to increase the printing speed, that is, the number of rotations of the motor, etc. At the same time as it gets higher, the installation space becomes larger. There is also a problem that the transferability of ink deteriorates when the number of rotations of the plate cylinder is increased.

The present invention has been made to solve the above-mentioned problems, and enables double-sided printing in a short time, easily and without printing errors, and is small in size, low in cost, and has good transferability of ink. A printing device is provided.

[0008]

According to the first aspect of the present invention,
The perforated master is wrapped around the outer peripheral surface of the plate cylinder, ink is supplied from the inner peripheral surface of the plate cylinder, the paper is pressed against the master, and the ink is transferred from the perforation of the master to the paper and printed. In the plate-making / printing apparatus, a plurality of ink supply means arranged inside the plate cylinder, and a paper feed section for feeding the paper to the master, the paper feed section having the same number as the ink supply means, are fed. It is characterized in that it is provided with the same number of pressing members as the number of the ink supply means for pressing the sheet against the master.

According to a second aspect of the present invention, the perforated plate-making master is wound around the outer peripheral surface of the plate cylinder, ink is supplied from the inner peripheral surface of the plate cylinder, and the paper is pressed against the master to apply the ink. In a plate-making printing apparatus that transfers from the perforations of a master to the paper and prints, first and second ink supply means arranged inside the plate cylinder, and a first paper feed for feeding the paper to the master. A paper unit, a first pressing member that presses the first surface of the paper fed from the first paper feeding unit against the master, and a paper unit that receives and stacks the paper printed on the first surface A first position and a second position for moving the tray between a first position and a second position for feeding the paper for printing on a second side of the paper; And a moving means for selectively moving the tray and the tray occupying the second position, Second for feeding the sheet on the tray
And a second pressing member for pressing the second surface of the sheet fed from the second sheet feeding section against the master.

According to a third aspect of the present invention, in the plate making / printing apparatus according to the second aspect, a supporting means for supporting a tray other than the tray is provided in the second paper feeding portion, and the first and second trays are provided. A feature is that the paper is fed from both of the paper feed units.

According to a fourth aspect of the present invention, the perforated plate-making master is wound around the outer peripheral surface of the plate cylinder, and ink is supplied from the inner peripheral surface of the plate cylinder. In a plate-making printing apparatus that transfers from the perforations of a master to the paper and prints, first and second ink supply means arranged inside the plate cylinder, and first and second inks for feeding the paper to the master. 2 sheet feeding units, 1st and 2nd pressing members for pressing the above-mentioned sheets fed from the 1st and 2nd sheet feeding units to the master respectively, and fed from the 1st sheet feeding unit A first paper discharge unit having a first conveyor belt that sucks and conveys the surface of the paper that faces the first pressing member;
And a second paper discharge unit having a second conveyor belt that sucks and conveys the surface of the paper fed from the paper feeding unit facing the second pressing member.

[0012]

According to the first aspect of the present invention, the perforated plate-making master is wound around the outer peripheral surface of the plate cylinder, and ink is supplied from the inner peripheral surface of the plate cylinder by a plurality of ink supply means. Paper is fed from the same number of paper feed units as the above, and the paper is pressed against the master by the same number of pressing members as the number of ink supply means, and the ink is transferred from the perforations of the master to the paper and printed.

According to the second aspect of the present invention, the sheet is fed from the first sheet feeding section, the first surface of the sheet is pressed against the master by the first pressing member to print, and the printed sheet is printed. Are discharged and stacked on the tray occupying the first position. The tray is moved to the second position by the moving means to face the second paper feed unit, the printed paper is fed from the second paper feed unit, and the second pressing member moves the second paper of the printed paper to the second position. Printed on the surface.

According to the third aspect of the present invention, the paper is fed from both the first and second paper feed portions and printed on two papers by one rotation of the plate cylinder.

In the invention of claim 4, the perforated plate-making master is wound around the outer peripheral surface of the plate cylinder, and ink is supplied from the inner peripheral surface of the plate cylinder by the first and second ink supplying means. Sheets are fed from the first and second sheet feeding units, and the two sheets are pressed against the master by the first and second pressing members to print. After that, the printed sheet is conveyed while the surfaces facing the first and second pressing members are sucked by the first and second conveying belts, respectively.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 indicates a plate-making printing apparatus. The plate-making printing apparatus 1 includes a printing unit 2, a plate-making unit 3, a first paper feeding unit 4, a second paper feeding unit 54, a plate discharging unit 5, a first paper discharging unit 6, a second paper discharging unit 46, and the like. It is mainly composed of.

The printing unit 2 includes a plate cylinder 7, a first ink supply unit 8, a second ink supply unit 28, a first press roller 9 as a first pressing member, and a second press member 9 as a second pressing member. It is mainly composed of two press rollers 49.

The plate cylinder 7 is formed of a porous thin plate into a cylindrical shape, and is driven to rotate about a support shaft, which will be described later, by plate cylinder driving means (not shown).

On the outer peripheral surface of the plate cylinder 7, a stage portion 10 extending in the same direction as the axis of the plate cylinder 7 and a clamper 11 for holding the tip of the master together with the stage portion 10 are arranged. The clamper 11 is rotatably supported by the support shaft 11 a, and is provided so as to come in contact with and separate from the stage unit 10. The clamper 11 is rotated by an opening / closing means (not shown),
It is selectively swung between a position in contact with the stage unit 10 and a position separated from the stage unit 10.

Inside the plate cylinder 7, a first ink supply means 8 is arranged. The first ink supply means 8 is mainly composed of an ink supply pipe 12, a first ink roller 13, and a first doctor roller 14.

The ink supply pipe 12, which also serves as a support shaft for the plate cylinder 7, is fixed to a housing side plate (not shown) of the plate making / printing apparatus 1, and its surface is for supplying ink to the inside of the plate cylinder 7. Several small holes are drilled. Below the ink supply pipe 12, a first ink roller 13 and a first doctor roller 14 are arranged. The first ink roller 13 rotatably supported by a side plate (not shown) inside the plate cylinder 7 has its outer peripheral surface abutted against the inner peripheral surface of the plate cylinder 7, and the ink supplied from the ink supply pipe 12 is supplied. Is supplied to the plate cylinder 7.

Near the first ink roller 13, a rotatable first doctor roller 14 is arranged. The first doctor roller 14 is arranged so that a slight gap is formed between the outer peripheral surface of the first doctor roller 14 and the outer peripheral surface of the first ink roller 13, and the first doctor roller 14 is close to the outer peripheral surface of the first ink roller 13. In the portion, a wedge-shaped ink reservoir 15 is formed. The ink supplied from the ink supply pipe 12 to the ink reservoir 15 passes through the gap between the first ink roller 13 and the first doctor roller 14 to form a uniform layer, and the ink of the first ink roller 13 Supplied on the surface.

A second ink supply means 28 is disposed inside the plate cylinder 7 at a position symmetrical with respect to the first ink supply means 8 and the ink supply pipe 12. Second
The ink supply means 28 of the second ink roller 43 for supplying ink by contacting the inner peripheral surface of the plate cylinder 7 and the second doctor roller 44 for supplying a predetermined amount of ink to the second ink roller 43. It is mainly composed of and.

Ink is supplied from the ink pipe 12 to the ink reservoir 45 between the second ink roller 43 and the second doctor roller 44 through a pipe (not shown).

The first and second ink rollers 13 and 43 and the first and second doctor rollers 14 and 44 are rotationally driven in synchronization with the plate cylinder 7 by drive transmission means (gear or belt) not shown. It

Below the plate cylinder 7, and above and below the plate cylinder 7, respectively, are supported by swinging means (not shown), and the outer peripheral surfaces of the plate cylinder 7 are attached to and separated from the outer peripheral surface of the plate cylinder 7. Two
First and second press rollers 9 and 49 as pressing members for
Is provided. The first press roller 9 causes the plate cylinder 7 to move the first surface of the paper fed from the first paper feed unit 4 described later.
The second press roller 49 is pressed against the second
The second surface of the paper fed from the paper feeding section 54 is pressed against the plate cylinder 7 to form a print image on the paper.

A document reading unit 20 for reading an image of the document 35 is arranged above the printing unit 2. Document reading unit 2
0 is an ADF unit 29, a fluorescent lamp 30, a mirror 31,
The lens 32 and the CCD 33 are mainly included.

The image information read by the CCD 33 is input to the A / D converter 36 and converted into a digital signal, as shown in FIG. A CCD image processing unit 37 for compressing image information is connected to the A / D converter 36, and the compressed image information is input to the control means 100. The control means 100 is composed of a well-known microcomputer having a CPU 51, a ROM 38 and a RAM 39. The image information is stored in the RAM 39 of the control means 100.

The ADF unit 29 includes a calling roller 40 for pulling out the original 35 and the lowest one of a plurality of originals.
A separation blade (not shown) that separates only one sheet, a pair of conveyance rollers 41 and 42 that conveys the original 35, the read original 3
It is mainly composed of a document tray 50 on which 5 is placed. The calling roller 40 and the conveying roller pair 41, 42 are
Each of them is rotationally driven by a document feeding motor (not shown).

On the right side of the printing section 2, a plate making section 3 is arranged. The plate making unit 3 is mainly composed of a plate making unit 17 for forming a punched image on the master 22, a cutting unit 18, a pair of conveying rollers 19, and the like.

The master 22 is wound in a roll shape, and its core is rotatably supported by the master support means 16. The master 22 has a laminated structure in which a very thin thermoplastic resin film such as polyester and a porous layer in which washi fibers and synthetic fibers are mixed are laminated.

Plate making means 17 is disposed on the left side of the master supporting means 16. The plate making means 17 is mainly composed of a platen roller 24, a thermal head 25 and the like. The platen roller 24 is rotationally driven by a stepping motor (not shown). The thermal head 25 is
It has a large number of heating elements inside, is biased by a biasing means (not shown), and is pressed against the platen roller 24.

As shown in FIG. 2, the thermal head 25 is connected to a thermal head image processing unit 48 for expanding image information and a control means 100 via a thermal head driver 26, and its operation is controlled. It The thermal head 25 receives the command from the CPU 51, and the CCD
It has a well-known function of selectively melting and perforating the thermoplastic resin film of the master 22 based on the image information read in 33 to form a perforated image.

On the downstream side of the master 22 of the plate making means 17 in the conveying direction, there is provided a cutting means 18 comprising a fixed blade for cutting the master 22 and a moving blade, and further downstream thereof is a master 22.
A conveying roller pair 19 for conveying the sheet to the plate cylinder 7 is provided.

Below the plate making section 3, a first sheet feeding section 4 is arranged. The first paper feed unit 4 is mainly configured by a paper feed tray 52, a first paper feed roller 53, a first pair of registration rollers 55, and the like.

The paper feed tray 52, on which the paper 56 is stacked, is supported by the housing so as to be vertically movable in association with the increase and decrease of the paper 56. The first paper feed roller 53 is provided so as to come into contact with the uppermost paper 56 on the paper feed tray 52, and is rotationally driven by a driving unit (not shown).

The first registration roller pair 55 causes the sheet 56 fed by the first sheet feeding roller 53 to be transferred at a timing synchronized with the rotation of the plate cylinder 7 and the swing of the first press roller 9. It is fed between the outer peripheral surface of 7 and the first press roller 9.

On the left side of the printing section 2, a plate discharging section 5 is arranged. The plate discharge unit 5 is mainly configured by an upper plate discharge member 59, a lower plate discharge member 60, a plate discharge box 61, a compression plate 62, and the like.

The upper plate discharging member 59 includes a driving roller 63 and a driven roller 6 which are driven to rotate by a plate discharging unit driving means (not shown).
4 and a rubber belt 65 hung between the rollers. The lower plate discharging member 60 includes a driving roller 63.
And a driven roller 67 that is connected and rotated by a gear (not shown), a driven roller 67, and a rubber belt 68 that is stretched between the rollers. The lower plate discharging member 60 is provided so as to be movable in the left-right direction around a support shaft of the driving roller 63 by a plate discharging unit moving means (not shown), and the outer peripheral surface of the driving roller 66 is relative to the outer peripheral surface of the plate cylinder 7. It is configured so that it can be brought into and out of contact with each other.

The plate discharge box 61 for storing the used master inside is detachably attached to the casing.
A compression plate 62 that moves up and down by an elevating means (not shown) is arranged above it.

Below the plate discharge section 5, a first sheet discharge section 6 is arranged. The first paper discharge unit 6 includes a first peeling claw 69,
The driven roller 70, the driving roller 71, the rubber belt 72, the suction fan 73, the tray 74 and the like are mainly configured.

The first peeling claw 69 for peeling the ink-transferred paper 56 from the outer peripheral surface of the plate cylinder 7 is rotatably supported by a casing side plate (not shown), and its tip is the outer periphery of the plate cylinder 7. It is arranged so that it can be moved toward and away from the surface.

The driven roller 70 and the drive roller 71 are rotatably supported by the housing side plate, and between the rollers,
A rubber belt 72 having a plurality of openings on its surface is spanned. The drive roller 71 is rotationally driven by a paper discharge unit drive means (not shown), and this rotational force is transmitted to the driven roller 70 via the rubber belt 72. A suction fan 73 for sucking the paper 56 printed on the first surface is disposed on the surface of the rubber belt 72 below the driven roller 70 and the drive roller 71.

As shown in FIGS. 1 and 3, a tray 74 for receiving and stacking the paper 56 printed on the first surface is located on the downstream side of the drive roller 71 in the paper carrying direction. The tray 74 has a first position (a position shown by a solid line in FIG. 1) for receiving and stacking the paper 56 printed on the first surface, and a paper 56 for printing on the second surface of the paper 56.
Is moved by the moving means 76 to a second position (position shown by phantom line in FIG. 1) for feeding. The moving means 76 is shown in FIG.
As shown in FIG. 4, the shafts 79, 80, 81, 82 and the pulleys 7 fixed to the shafts 79, 80, 81, 82, respectively.
9a, 79b, 79c, 80a, 80b, 80c, 81
a, 81b, 82a, 82b, a belt 78a stretched between the pulley 79a and the pulley 82a, and the pulley 7
Belt 78b hung between 9b and pulley 82b
A belt 78c stretched between a pulley 80b and a pulley 81b, a belt 78d stretched between a pulley 80a and a pulley 81a, a pulley 79c and a pulley 8
0c, and a tray moving motor M that drives the shaft 80.

Belts 78a, 78b, 78c, 78d
Are fixed to the four convex portions 77a, 77b, 77c, 77d provided so as to project on the side edges of the tray 74 by appropriate means.

In FIGS. 1 and 3, reference numeral 84 is a lower limit sensor 84 for detecting that the tray 74 has occupied the first position for receiving and stacking the paper 56, while reference numeral 85 is for the tray 74. Paper 5 for printing on the second side of
The upper limit sensors 85 for detecting occupancy of the second position for feeding 6 are respectively shown. Both sensors 84, 8
5, the detection signal of the tray 74 is CP as shown in FIG.
Input to U51, the CPU 51 controls the operation of the tray moving motor M.

On the left side of the printing unit 2, there is provided a second paper feeding unit 54 for feeding the paper 56 on the tray 74 when the tray 74 occupies the second position. The second sheet feeding unit 54 is mainly configured by a second sheet feeding roller 86, a second pair of registration rollers 87, and the like.

The second paper feed roller 86 is provided so as to come into contact with the uppermost paper 56 on the tray 74, and is rotationally driven by a driving means (not shown). The second registration roller pair 87 rotates the sheet 56 fed by the second paper feed roller 86 and rotates the plate cylinder 7 and the second press roller 49.
The sheet is fed between the outer peripheral surface of the plate cylinder 7 and the second press roller 49 at a timing synchronized with the swing of the.

On the upper right side of the printing unit 2, a second paper discharge unit 46 is arranged as shown in FIG. Second paper output unit 46
The configuration of the above is different only in that the suction fan is arranged on the upper side of the rubber belt with respect to that of the above-described first paper discharging unit 6, and therefore the reference numeral of the component used for the first paper discharging unit 6 is a. It is indicated by the added reference numeral, and the description of the individual parts is omitted.

As shown in FIG. 1, a discharge tray 88 for receiving and stacking the printed paper 56 is arranged on the downstream side of the drive roller 71a in the conveying direction of the paper 56. The paper discharge tray 88 is detachably attached to the housing.

As shown in FIGS. 5 and 6, the second sheet feeding section 5
4, a tray 89 different from the tray 74 is not shown,
For example, it can be supported by a well-known sheet cassette supporting means in a copying machine or the like.

At the lower front edge of the tray 89, a protruding portion 89
A is formed, and below the upper limit sensor 85, a tray set detection 90 for detecting that the tray 89 is supported at a predetermined position of the second sheet feeding portion 54 is arranged. The protruding portion 89a is inserted into the tray set detection 90 when the tray 89 is supported at a predetermined position of the second paper feeding portion 54.

As shown in FIG. 6, the bottom plate 92 of the tray 89 is swingably supported about a shaft 91. A swing piece 93 fixed to a shaft 93a for swinging the bottom plate 92 is arranged in contact with the lower surface of the bottom plate 92.
A gear 94 is fixed to the end of a. A gear 95 fixed to the shaft of the bottom plate motor 96 meshes with the gear 94. As shown in FIG. 4, the gear 95 is arranged at a position where it does not interfere with the tray 74 when the tray 74 moves.

As shown in FIG. 2, the CPU 51 is connected to an operation unit 75 for setting various conditions for printing and plate making, and further information from various sensors such as an upper limit sensor 85, a lower limit sensor 84, and a tray set detection 90. Is entered. CPU
Reference numeral 51 controls the sequence of all operations of various loads such as the plate cylinder driving means, the tray moving motor M, the bottom plate motor 96, the lamp, the stepping motor, and the document conveying motor, based on these information and various conditions.

Based on the above configuration, the operation of the plate making / printing apparatus 1 will be described below. As shown in FIG. 1, the ADF unit 2
After setting a plurality of originals 35 on the original placing section on 9,
When the plate making and printing conditions are set by the various keys of the operation unit 75 and the plate making start key is pressed, the calling roller 40 is pressed.
Rotates and separates only the lowest one original 35 among the plurality of originals 35 and feeds it to the original conveying roller pair 41, 42.

At approximately the same time as the above operation, the fluorescent lamp 30 is turned on to illuminate the original 35, and the reflected light is reflected by the mirror 31 and guided to the lens 32, and is incident on the CCD 33.
The image information incident on the CCD 33 is analog / digital converted by the A / D converter 36. Then, the image information converted into a digital signal is compressed by the CCD image processing unit 37 and stored in the RAM 39.

In parallel with the original image reading operation of the original 35 in the original reading section 20, the plate discharge operation for separating the used master from the outer peripheral surface of the plate cylinder 7 is performed. The plate cylinder 7 having the used master wound on the outer peripheral surface thereof starts to rotate in the counterclockwise direction by a plate cylinder driving means (not shown). When the plate cylinder 7 reaches a predetermined plate discharge position where the rear end of the used master wound around the outer peripheral surface of the plate cylinder 7 corresponds to the drive roller 63, the plate discharge unit moving unit and the plate discharge unit driving unit (not shown) are activated. The drive rollers 63 and 66 are rotated and the lower plate discharging member 60 is moved to the plate cylinder 7 side. When the outer peripheral surface of the drive roller 66 contacts the outer peripheral surface of the plate cylinder 7,
Continues to rotate in the counterclockwise direction, and the drive roller 66
The used master whose back end was scooped by
It is sandwiched between the lower plate discharging member 60 and the upper plate discharging member 59, and peeled off from the outer peripheral surface of the plate cylinder 7. The peeled used master is conveyed by the lower plate discharging member 60 and the upper plate discharging member 59 and discarded in the plate discharging box 61, and then compressed by the compression plate 62.

When all the used master has been peeled off from the outer peripheral surface of the plate cylinder 7, the plate cylinder 7 further rotates and stops at the plate feeding position shown in FIG. When the plate cylinder 7 stops at the plate feeding position, an opening / closing means (not shown) is activated to rotate the clamper 11 clockwise to a position shown by an imaginary line in the figure, and the plate cylinder 7 waits for the plate feeding shown in FIG. Then, the plate discharge operation is completed.

When the plate discharging operation is completed, the plate making operation is subsequently performed. The platen roller 24 of the plate making unit 3 is rotationally driven by a stepping motor (not shown), and the master 22 is pulled out. And the platen roller 24
When the CPU 51 determines that the image forming area of the master 22 has reached the thermal head 25 based on the number of steps of the stepping motor that drives the CPU 3, the CPU 51 causes the RAM 3 to operate.
The image information stored in 9 is called and expanded by the thermal head image processing unit 48. The thermal head 25 selectively causes each heating element to generate heat based on the image information to form a punched image on the master 22.

The master 22 on which the punched image is formed is conveyed to the clamper 11 by the conveying roller pair 19. The CPU 51 determines that the tip of the master 22 reaches a predetermined position between the clamper 11 and the stage unit 10 based on the number of steps of the stepping motor that rotationally drives the platen roller 24.
When the judgment is made, the opening / closing means (not shown) is actuated to rotate the clamper 11 in the counterclockwise direction, and the front end of the master 22 is held between the stage portion 10 and the clamper 11, and then the plate cylinder 7
Starts rotating at substantially the same peripheral speed as the master transport speed, and the winding of the master 22 around the plate cylinder 7 is started.

When it is determined from the number of steps of the stepping motor that rotationally drives the platen roller 24 that the plate making for one plate is completed, the platen roller 24 and the conveying roller pair 19 are stopped from rotating, and the cutting means. The master 22 is disconnected by 18. Master 22 disconnected
Is pulled out by the rotation of the plate cylinder 7, and the winding operation is completed.

Following the winding operation, the printing process is started. After the master 22 is wound around the outer peripheral surface of the plate cylinder 7, the plate cylinder 7 is rotated in the clockwise direction and the paper feed tray 52
Of the plurality of sheets 56 stacked above, only the uppermost one sheet 56 is pulled out by the first paper feed roller 53 and fed to the first pair of registration rollers 55. First
The pair of registration rollers 55 of the registration roller pair 55 moves the paper 56 to the plate cylinder 7 and the first press roller 9 at the timing when the image area of the master 22 wound around the plate cylinder 7 reaches the position corresponding to the first press roller 9. To be delivered in between.

At this time, the first ink roller 13 is also attached to the plate cylinder 7.
Rotate in the same direction as the rotation direction. The ink in the ink reservoir 15 is attached to the surface of the first ink roller 13 by the rotation of the first ink roller 13 and the first doctor roller 14, and the first ink roller 13 and the first doctor roller 14 When passing through the gap between and, the amount is regulated and supplied to the inner peripheral surface of the plate cylinder 7.

Further, the second ink roller 43 and the second doctor roller 44 also start to rotate. The amount of the ink in the ink reservoir 45 is regulated between the second ink roller 43 and the second doctor roller 44 and adheres to the surface of the second ink roller 43.

The fed paper 56 has the first surface of the master 2 wound around the plate cylinder 7 by the first press roller 9.
Pressed on 2. By this pressing operation, the first press roller 9, the paper 56, the master 22 and the plate cylinder 7 are brought into pressure contact with each other, and the ink is transferred from the perforations of the master 22 to the paper 56 for printing.

The printed paper 56 has a first peeling claw 69.
Is peeled off from the outer peripheral surface of the plate cylinder 7 at the leading end of the sheet, falls downward, is conveyed to the left while being attracted to the upper surface of the rubber belt 72, and is discharged onto the tray 74. By the series of steps described above, the printing of the first side of the paper 56 is sequentially and continuously performed.

Following this operation, the operation for printing on the second side of the paper 56 will be briefly described. When the printing of the first side of the predetermined number of sheets 56 is completed, the tray moving motor M starts to rotate as shown in FIGS. The tray moving motor M transmits the rotation to the shaft 79 via the shaft 80 and the belt 83, and the belts 78a, 78b, 78c, 78.
The tray 74 is raised by rotating d in the direction of the arrow. When the tray 74 moves to the second position and the upper limit sensor 85 detects the paper 56, the detection signal of the upper limit sensor 85 is the CPU.
It is input to 51, and the rotation of the tray moving motor M is stopped based on this input signal.

Then, similarly to the above-described operation, the used master 22 on the outer peripheral surface of the plate cylinder 7 is discharged, the next original is read, and the newly punched master 22 is formed on the outer peripheral surface of the plate cylinder 7. Wrapped around.

After the master 22 is wound around the outer peripheral surface of the plate cylinder 7, the plate cylinder 7 is rotated in the clockwise direction, and the uppermost one of the sheets 56 stacked on the tray 74 is the second sheet. Is fed out to the second registration roller pair 87. Second registration roller pair 87
Feeds the paper 56 between the plate cylinder 7 and the second press roller 49 at a predetermined timing.

At this time, the first and second ink rollers 13,
43 also rotates in the same direction as the rotation direction of the plate cylinder 7. The amount of ink in the ink reservoir 45 is regulated between the second ink roller 43 and the second doctor roller 44, and the second
Attached to the surface of the ink roller 43. On the other hand, the ink in the ink reservoir 15 is attached to the surface of the first ink roller 13 by the rotation of the first ink roller 13 and the first doctor roller 14, and the first ink roller 13 and the first ink roller 13 are rotated.
When passing through the gap with the doctor roller 14, the amount is regulated and supplied to the inner peripheral surface of the plate cylinder 7.

The fed paper 56 is pressed by the second press roller 49 against the master 22 having the second surface wound around the plate cylinder 7. By this pressing operation, the second press roller 49, the paper 56, the master 22, and the plate cylinder 7 are brought into pressure contact with each other, the ink is transferred from the perforations of the master 22 to the paper 56, and printing is performed.

The printed sheet 56 has a second peeling claw 69.
The rubber belt 7 is peeled off from the outer peripheral surface of the plate cylinder 7 at the tip of a.
It is conveyed to the right while being attracted to the lower surface of 2a, and is ejected onto the paper ejection tray 88. By the series of steps described above,
Printing on both sides of the paper 56 is sequentially and continuously performed.

When printing on both sides of the paper 56 is completed, as shown in FIG.
As shown in FIG. 4, the tray moving motor M rotates in the opposite direction to the above case, and the belts 78a, 78b, 78c,
The tray 74 is lowered by rotating 78d in the direction opposite to the arrow direction. When the tray 74 moves to the first position and the lower limit sensor 84 detects the tray 74, the detection signal of the lower limit sensor 84 is input to the CPU 51, and the rotation of the tray moving motor M is stopped based on this input signal. It

In the present example, the second paper feed roller 54 starts from the top of the stacked paper 56.
I tried rubbing the first side of the paper 56 to feed it.
It is also possible to feed the stacked sheets 56 from below without rubbing the first surface.

Next, the operation in the case of feeding the paper 56 from both the first and second paper feed units 4 and 54 will be briefly described. As shown in FIG. 5 and FIG. 6, when the tray 89 on which the sheets 56 are stacked is supported by the second sheet feeder 54, the gear 94
The gear 95 meshes with. On the other hand, the protruding portion 89 a is inserted into the tray set detection 90, the tray set detection 90 detects the tray 89, and the detection signal is input to the CPU 51. The CPU 51 determines the bottom plate motor 96 based on this detection signal.
To rotate the gears 95, 94 and the shaft 93a to swing the swinging piece 93, and swing the bottom plate 92 around the shaft 91. When the paper 56 contacts the second paper feed roller 86 and the upper limit sensor 85 detects the paper 56, the detection signal of the upper limit sensor 85 is input to the CPU 51, and the CPU 51 rotates the bottom plate motor 96 based on this input signal. To stop.

As described above, the used master 22 is discharged, the new master 22 is punched, and the master 22 is used as the plate cylinder 7.
Is wrapped around. After that, the papers 56 loaded on the paper feed tray 52 and the tray 89 are fed by the first and second paper feed rollers 53 and 86, respectively, and printed as described above. In this manner, when the paper 56 is fed to the plate cylinder 7 from the first and second paper feed units 4 and 54, respectively,
It is possible to print on the two sheets of paper 56 by one rotation, and high-speed printing is performed.

In this example, the ink supply means, the paper feed section,
Two pressing members are provided, but the present invention is not limited to this number.

[0078]

According to the first aspect of the invention, the ink is supplied by the plurality of ink supply means, the paper is fed from the same number of paper feed sections as the number of ink supply means, and the same number as the number of ink supply means. Since the paper is pressed against the master by the pressing member and the ink is transferred from the perforation of the master to the paper for printing, it is possible to print on a plurality of papers by one rotation of the plate cylinder, which not only shortens the time but also the plate. A high-speed printing can be performed without increasing the number of rotations of the cylinder, and it is possible to provide a plate-making printing apparatus that is small in size, low in cost, and has good ink transferability.

According to the second aspect of the invention, the tray on which the sheets of paper printed on the first side are stacked is moved to the second position by the moving means, and is fed from the second paper feeding section to feed the first sheet of paper. Since it is printed on the second side, double-sided printing is possible with one plate cylinder. Furthermore, since it is not necessary to reset the paper printed on the first side, it is possible to easily perform double-sided printing without a printing error in a short time.

According to the third aspect of the present invention, the sheet is fed from both the first and second sheet feeding portions, and two sheets can be printed by one rotation of the plate cylinder. In addition, not only the time is shortened, but also high-speed printing can be performed without increasing the rotation speed of the plate cylinder, and it is possible to provide a plate-making printing apparatus that is small in size, low in cost, and has good ink transferability.

According to the fourth aspect of the invention, the printed sheet is conveyed while being sucked by the first and second conveying belts on the surfaces facing the first and second pressing members, respectively.
In addition to the effect of the first aspect, it is possible to prevent the printed surface from being soiled and to reliably discharge the paper.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a plate-making printing apparatus that employs an embodiment of the present invention.

FIG. 2 is a block diagram of electrical equipment according to an embodiment of the present invention.

FIG. 3 is an enlarged side view of a main part of a moving unit.

FIG. 4 is a perspective view of moving means.

FIG. 5 is an overall configuration diagram of a plate-making printing apparatus showing a state in which a tray is supported by a second paper feeding unit.

FIG. 6 is an enlarged cross-sectional view of a main part of the tray.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate-making printing apparatus 2 Printing section 3 Plate-making section 4 1st paper feed section 5 Plate discharge section 6 1st sheet discharge section 7 Plate cylinder 8 1st ink supply means 9 1st press roller as a 1st press member 20 Document Reading Section 22 Master 25 Thermal Head 28 Second Ink Supplying Means 35 Document 49 Second Press Roller as Second Pressing Member 54 Second Paper Feeding Section 74 Tray 76 Moving Means

Claims (4)

[Claims] 1. A perforated plate-making master is wound around the outer peripheral surface of a plate cylinder, ink is supplied from the inner peripheral surface of the plate cylinder, and the paper is pressed against the master to eject the ink through the perforations of the master. In a plate-making printing apparatus that transfers to and prints on the plate cylinder, a plurality of ink supply means arranged inside the plate cylinder, and a paper feed section for feeding the paper to the master, the same number of paper feed units as the ink supply means. A plate-making printing apparatus comprising: a pressing member that presses the fed sheet against the master; the pressing members are the same in number as the ink supply unit. 2. A perforated plate-making master is wound around an outer peripheral surface of a plate cylinder, ink is supplied from the inner peripheral surface of the plate cylinder, and a paper is pressed against the master to apply the ink from the perforations of the master to the paper. In a plate-making printing apparatus that transfers to and prints on a plate, first and second ink supply means arranged inside the plate cylinder, a first paper feed unit for feeding the paper to the master, A first pressing member for pressing the first surface of the paper fed from the paper feeding unit against the master; a first position for receiving and stacking the paper printed on the first surface; A tray movable between a second position for feeding the paper for printing on a second side of the paper, and selectively moving the tray between a first position and a second position Moving means for moving the tray and the paper on the tray when the tray occupies the second position. Plate-making printing comprising: a second paper feeding unit for feeding; and a second pressing member for pressing the second surface of the paper fed from the second paper feeding unit against the master. apparatus. 3. The plate-making printing apparatus according to claim 2, wherein the second paper feeding portion is provided with a supporting means for supporting a tray different from the tray, and the supporting means is provided from both the first and second paper feeding portions. A plate-making printing device characterized by feeding paper. 4. A perforated plate-making master is wound around the outer peripheral surface of a plate cylinder, ink is supplied from the inner peripheral surface of the plate cylinder, and a paper is pressed against the master to apply ink from the perforations of the master to the paper. In a plate-making printing apparatus for transferring to and printing on a sheet, first and second ink supply means arranged inside the plate cylinder, and first and second sheet feeding units for feeding the sheet to the master. , First and second pressing members for pressing the sheets fed from the first and second sheet feeding units to the master, respectively, and a first sheet of the sheets fed from the first sheet feeding unit. A first paper discharge unit having a first conveyor belt that sucks and conveys a surface facing the pressing member, and a surface of the sheet fed from the second paper feeding unit facing the second pressing member. A second sheet discharge section having a second conveyor belt for sucking and conveying the sheet. That plate making printing device.