JPH0389355A - Automatic composer - Google Patents

Abstract

PURPOSE:To improve the work efficiency by executing in parallel positioning to an exposure base of an unexposed photosensitive planographic printing plate and discharge from the exposure base of an exposed printing plate. CONSTITUTION:An unexposed photosensitive planographic printing plate 14 on a photosensitive material holding base 16 is sucked by a first sucking means 74, and a moving member 26 is moved onto an exposure base 22 along a guide rail 36. In this case, on the exposure base 22, an exposed printing plate 14 is placed in advance, and accordingly, the unexposed printing plate 14 and the the exposed printing plate 14 become a state that they are superposed at a prescribed interval in the wall thickness direction. In this case, in a second control means, this exposed printing plate 14 is sucked by a second sucking means 76 and discharged, and after this discharge of the exposed printing plate 14 is ended, in a third control means, the exposure base 22. In such a way, the work efficiency is improved, and the number of processing sheets per unit time can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic plate printing machine that prints an image recorded on a manuscript onto a photosensitive planographic printing plate.

[Prior art]

In a conventional automatic printing plate machine, the photosensitive planographic printing plate is transported by a belt conveyor, guided to the loading section of the automatic printing machine, and then moved along a guide rail with the photosensitive planographic printing plate adsorbed by the suction means. It is transferred to the exposure stage by a movable member. In the exposure table, after the image recorded on the document is printed on the photosensitive planographic printing plate, the photosensitive planographic printing plate is again attracted to the moving means, transferred to the ejecting section, and ejected. By repeating this process, exposure processing is automatically performed on successive photosensitive planographic printing plates.

[Problem to be solved by the invention]

However, in an automatic printing plate machine with such a structure, until one photosensitive planographic printing plate is loaded, exposed, and ejected, the next photosensitive planographic printing plate cannot be processed. First, there is a limit to the number of sheets that can be processed per unit time, making it impossible to work quickly.

The present invention takes the above-mentioned facts into consideration, and takes into account the loading of a photosensitive lithographic printing plate,
It is an object of the present invention to provide an automatic plate printing machine that can perform ejection in parallel, improve work efficiency through this parallel operation, and increase the number of sheets processed per unit time.

[Means to solve the problem]

The automatic plate printing machine according to the present invention includes: an exposure table for printing an image of a document onto a photosensitive lithographic printing plate; a photosensitive material holding table attached to the exposure table and on which an unexposed photosensitive lithographic printing plate is placed; a moving member that moves along a guide rail on the exposure table and the photosensitive material holding table; a first suction means provided on the moving member that adsorbs an unexposed photosensitive lithographic printing plate on the photosensitive material holding table; , a second suction means provided on the moving member for suctioning the exposed photosensitive lithographic printing plate on the exposure table;
a first control means for moving the moving member from the photosensitive material holding table onto the exposure table with the unexposed photosensitive lithographic printing plate suctioned by the suction means; a second control means for adsorbing the exposed photosensitive planographic printing plate and discharging the adsorbed exposed photosensitive planographic printing plate;
a third position for positioning the unexposed photosensitive lithographic printing plate adsorbed by the first suction means onto the exposure table after being ejected by the control means;
and control means.

[Effect]

According to the present invention, first, an unexposed photosensitive lithographic printing plate is placed on a photosensitive material holding table. This photosensitive planographic printing plate is sucked by the first suction means, and the moving member is moved onto the exposure table along the guide rail. At this time, an exposed photosensitive planographic printing plate is placed on the exposure table. Therefore, the unexposed photosensitive lithographic printing plate and the exposed photosensitive lithographic printing plate are stacked at a predetermined interval in the thickness direction. here,
In the second control means, the exposed photosensitive planographic printing plate is sucked by the second suction means and discharged. After the second control means finishes discharging the exposed photosensitive planographic printing plate, the third control means
The control means positions the unexposed photosensitive lithographic printing plate adsorbed by the first suction means onto the exposure table.

In this way, in the present invention, the positioning of an unexposed photosensitive lithographic printing plate on the exposure table and the ejection of the exposed photosensitive lithographic printing plate from the exposure table can be performed in parallel, which improves work efficiency. The number of sheets processed per unit time can be greatly increased.

〔Example〕

FIG. 1 and FIG. 2 show an automatic plate printing machine 10 according to this embodiment.
It is shown. This automatic plate printing machine 10 is a tilt type,
The work surface 12 is inclined at approximately 70° with respect to the horizontal plane.

The work surface 12 is divided into three types of work tables, and the right side in FIG. 1 is used as a photosensitive material holding table on which an unexposed photosensitive lithographic printing plate (hereinafter referred to as PS plate) 14 is placed and a sub-exposure table. This is the first workbench 16.

The unexposed 23rd plate 14 is placed onto the first workbench 16 by a belt conveyor (not shown). The 23rd plate 14 has a plurality of circular holes 18 near its upper side.
A pin 20 protruding from the first workbench 16 is inserted into the circular hole 18 for support and positioning. 23rd plate 14 on workbench 16
The 23rd printing plate 14 is closely held on the workbench 16 by a suction pump through a groove (not shown) provided on the lower surface of the plate.

The second workbench 22, which serves as a main exposure table and is located at the center of the work surface 12, is used as an exposure processing position for the 23rd plate 14. A pin 24 is provided upright on the second workbench 22, similar to the pin 20 provided on the first workbench 16, and by driving a sub-frame body 26, which will be described later, the first workbench is The 16th to 23rd plates 14 are conveyed, and the pins 24 are inserted into the circular holes 18 of the 23rd plate 14 to support and position them. Further, like the workbench 16, the second workbench 22 is also provided with a groove for suction and close contact of the 23rd plate 14.

Furthermore, the work surface 12 on the left side of FIG. 1 serves as a third work table 30 on which documents 28 on which images have been recorded are stored in layers. The original 28 is attached to a main frame 32 which will be described later.
It is taken out from the top layer and conveyed to the second workbench 22. In addition, the third workbench 3
0, there is a discharge section 34 for discharging the original 28 after exposure.
is formed.

Guide rails 36 are provided on both the upper and lower sides of the work surface 12 in FIG.
are laid horizontally and parallel to each other. The main frame body 32 and the sub-frame body 26 are hung on this guide rail 36 . The work surface 12 is provided with an actuator mechanism (not shown) inside thereof, and is driven by a signal from the control device 38 to move toward and away from the main frame 32 and the sub-frame 26 (second direction). It is possible to move in the direction of the arrow in the figure.

A plurality of rollers 40 are attached to the main frame 32, and the rollers 40 are supported on the guide rail 36, thereby making the main frame 32 movable along the guide rail 36. This upper frame body 32 is configured to move in close proximity to the surfaces of the second workbench 22 and the third workbench 30.

The roller 40 is driven by a motor 42 attached to the main frame 32.
It is connected to the rotating shaft of the machine so that it can be rotated. The motor 42 is connected to the control device 38 and the control device 3
The main frame body 32 can be moved along the guide rail 36 by driving this motor 42 with a drive signal from the main frame 8 .

An exposure device 44 is attached to the arm 32A of the arm 32A constituting the main frame 32 and the bar 32B hooked thereto. A motor 45 connected to the control device 38 is attached to the arm 32A.
When the motor 45 is driven by the signal from 8, the exposure device 44
is adapted to be moved in the direction of the arrow Y in FIG. 1 along the arm 32A. As a result, the exposure device 44 moves the main frame 32 along the guide rail 36 and the arm 3
Movement along 2A (X-Y movement) will be performed. Note that instead of attaching the motor 42 to the main frame 32, the motor 42 may be provided on the main body side and the frame 32 may be moved by rotating a ball screw or a shaft.

As shown in FIGS. 3 and 4, the exposure device 44 includes a light source 48 within its housing 46, and a rectangular transparent glass plate 50 is installed on the surface facing the work surface 12. Light source 48 is connected to control device 38 . On the surface of the transparent glass plate 50 inside the housing 46, a mask member 54 wound around a winding shaft 52 is disposed around the four circumferences thereof. Each winding shaft 52 has an axis centered on a transparent glass plate 50.
The motor 56 is connected to the control device 38 to rotate the motor 56 . By this rotation of the winding shaft 52, one end of the mask member 54 is wound up or unwound, and the free end is placed at an arbitrary position on the transparent glass plate 50 to block exposure.
This configuration adjusts the transmission area of the exposure light from the light source 48 at 0.0.

A rod-shaped groove 58 is formed on the surface of the baking frame 46A around the transparent glass plate 50. A part of this groove 58 has a communication pipe 6
A suction pump 62 is installed which sucks air through 0. For this reason, the original 28 is placed on the transparent glass plate 50.
By operating the suction pump 62 while in close contact with the transparent glass plate 50, the original 28 can be attracted to the surface of the transparent glass plate 50.

As shown in FIG. 1, the original 28 is constructed by pasting a thin film 66ifi on which an image is recorded based on the center (intersection of diagonal lines) of a transparent support 64.

The outer dimensions of the transparent glass plate 50 are slightly larger than the dimensions of the film 66, and the original 28 is sucked based on the center of the transparent glass plate 50 (intersection of diagonals). Therefore, the portion other than the image plane (transparent support 64) is shielded by the mask member 54.

Marks 68 are attached on all sides of the portion of the transparent glass plate 50 that is shielded by the mask member 54. This mark 68 is applied as a positioning mark during printing by exposing the 23rd plate 14 to light, and normally four sheets are exposed to a predetermined position on a pair of 23rd plate 14. That is, exposure to the 23rd plate 14 includes Y (yellow) dye, M (magenta) dye, C
(cyan) dye and BK (black) dye are exposed separately, and by sequentially printing with these 23 plates 14,
Color printing is possible.

Here, marks 68 are placed on all sides of the transparent glass plate 50 because the most suitable mark 68 is selected depending on the orientation (vertical and horizontal) when printing the 23rd plate 14 and the position when exposing the mark 68. This is to do so.

When exposing this mark 68 to the 23rd plate 14, the transparent glass plate 50 other than the selected mark 68 is exposed to the mask member 54.
After shielding the light, the exposure device 44 may be positioned at a predetermined position and the light source 48 may be turned on. For example, when applying the mark 68A in the upper right corner of Fig. 4, the mask member 5 on the upper side
4 from the transparent glass plate 50, and remove the mask member 5 on the lower side.
4 to the lower end of the mark 68A, and after unwinding the mask member 54 on the left side to the left end of the mark 68A, the light source 48 is turned on.

On the other hand, the sub-frame body 26 attached to the main frame body 32
2, and a sub-exposure device 69 is attached to the arm 26A. The configuration of the sub-exposure device 69 is the same as that of the exposure device 44, but since it is not necessary to attract the original 28, the groove 58 in FIG. 3 is omitted.

Of the arm 26A constituting the sub-frame body 26 and the bar 70 hooked thereto, an auxiliary bar 72 parallel to this bar 70 is further above the bar 70 on the upper side in FIG.
The hook is passed to A and installed. This sub-frame body 26 is configured to move on the surfaces of the first workbench 16 and the second workbench 22.

These bars 70 and auxiliary bars 72 have suction cups 74 , 76 attached to their faces facing the working surface 12 . The suction cups 74 and 76 are attached to the tip of the support shaft 78,
Connected to a negative pressure source via an on-off valve (not shown), 23rd edition 1
It is said to be used for adsorption of 4. The length of the support shaft 78 attached to the auxiliary bar 72 is longer than the support shaft 78 of the bar 70, so that the suction cup 7 on the auxiliary bar 72 side
6 is closer to the work surface 12 than the suction cup 74 on the bar 70 side.

The bar 70 and the auxiliary bar 72 are connected to each other by a parallel straight section of an endless chain 80, and a portion of the chain 80 is connected to a motor 82 connected to the control device 38.
It is wound around the rotating shaft 84 of. Here, motor 8
By rotating the bar 70 and the auxiliary bar 72 in response to a signal from the control device 38, the bar 70 and the auxiliary bar 72 can be integrally moved in the vertical direction in FIG.

Note that normally, the suction cup 74 provided on the bar 70 is separated from the 23rd plate 14 placed on the first workbench 16 (transport position). Here, when the work surface 12 is moved in the direction approaching the suction cup 74, the suction cup 76 comes into contact with the work surface 12 first, but in this embodiment, the suction cup 76 of the auxiliary bar 72 corresponds to the 1 workbench 16,
A groove 86 is formed so that the work surface 12 and the suction cup 76 do not interfere with each other.

The sub-frame body 26, which has the 23rd plate 14 placed on the first workbench 16 adsorbed by the suction cup 74, is moved along the guide rail 36 from the first workbench 16 to the second workbench 22. However, at this time, the bar 70 and the auxiliary bar 72 move downward in FIG. 1 due to the drive of the motor 82 (discharge preparation position).
Move without force. As a result, the second workbench 22
The sub-frame body 26 that has reached the top comes to face the exposed PS plate 14 on which the suction cup 76 attached to the auxiliary bar 72 is placed on the second workbench 22. Therefore, when the sub frame body 26 and the work surface 12 approach, the suction cup 76 on the side of the auxiliary bar 72 comes into contact with the 23rd plate 14 first, and attracts the 23rd plate 14. In this state, the control device 38 temporarily moves the work surface 12 away from the sub-frame body 26 to which the PS plate 14 is attracted, and at the same time moves the bar 70 and the auxiliary bar 72 upward in FIG. (See FIGS. 5(A) and 5(B)).

Above the second workbench 22 in FIG.
8 are connected in series, and serve as an ejection section for the exposed PS plate 14. That is, when the bar 70 and the auxiliary bar 72 of the sub-frame body 26 are moved upward in FIG. 88 (Fig. 5 (C)
)) The sub-exposure device 69 installed in the sub-frame body 26 is
It is provided to expose unexposed parts other than the part where the image on the 8th plate 14 is exposed and the part where the mark 68 is attached. That is, in order to prevent ink from being deposited on unexposed areas of the 28 plate 14 during printing, it is necessary to expose and burn off unnecessary areas in advance. For this reason, in this embodiment, before image exposure (main exposure) on the second workbench 22, unnecessary portions are exposed (sub-exposure) according to a signal from the control device 38. That is, the control device 3
In No. 8, since the area of the 28 plate 14 to be image-exposed next is set in advance, by using this signal, unnecessary portions can be exposed before image exposure.

The operation of this embodiment will be explained below with reference to the flowcharts of FIGS. 6 to 8.

First, if the 28th plate 14 is not placed anywhere on the work surface 12, an initial routine shown in FIG. 6 is performed.

In step 100, the main frame 32 is positioned on the third workbench 30, and then in step 102, the sub frame 26 is positioned on the second workbench 30.
position on the workbench 22.

In the next step 104, the 28 plates 14 are conveyed by a belt conveyor and placed on the first workbench 16. In this case, the first workbench 1 is inserted into the circular hole 18 provided in the 28th plate 14.
The pin 20 protruding from 6 is inserted, and the 23rd plate is sucked by the suction pump through the groove provided in the workbench 16, so that the 28th plate 14 is transferred to the first workbench 16.
It is held in close contact with and positioned.

After the 28 plate 14 is placed on the first workbench 16, the subframe body 26 is positioned on the first workbench 16 in step 106.

In this state, the control device 38 operates the sub-exposure device 69 to perform sub-exposure (step 108).

Since the control device 38 recognizes in advance the main exposure area and the like of the 28 plate 14 currently placed on the first workbench 16, the sub-exposure can be performed before the main exposure.

After the sub-exposure is completed, the process moves to step 110 and the work surface 12 is moved in a direction approaching the sub-frame 26. Thereby, the 28 plates 14 on the first workbench 16 can be sucked by the suction cup 74. In the next step 112, the work surface 12 is separated again while the 28 plate 14 is being attracted, and the sub frame body 26 is further moved and positioned on the second work table 22. When the positioning on the second workbench 22 is completed, in step 114, the worksurface 12 is again placed on the sub-frame body 2.
After moving in six directions, the pin 24 protruding from the second workbench 22 is inserted into the circular hole 18 of the 28 plate 14, and after releasing the suction by the suction cup 74, the work surface 12 is returned. This results in
It is possible to support and position the 28 plate 14 on the second workbench 22 after the sub-exposure has been completed.

The initial routine is thus completed, and if the exposure work is to be continued thereafter, the process is performed according to the continuation routine shown in FIG.

In step 200, the 28 plate 14 is placed on the first workbench. The 28th plate 14 is conveyed by a belt conveyor in the same way as described above, and the 28th plate 14 is transferred to the circular hole 18 of the 28th plate 14 on the first workbench 1.
This is done by inserting the pin 20 of No. 6.

In the next step 202, the suction pump 62 of the exposure device 44 attached to the main frame 32 on the third workbench 30 is activated to suck the original 28 onto the surface of the transparent glass 50. In this state, the subframe 26 is positioned on the first workbench 16, and the main frame 32 is positioned on the second workbench 22 (steps 204 and 206).

In the next step 208, the exposure device 69 of the sub-frame body 26
Then, in step 210, the exposure device 44 of the main frame 32 performs a main exposure process. When the main exposure is completed, in step 212, the screen 54 is driven to expose only the necessary marks 68 from the surface of the transparent glass 50, and the process proceeds to step 214, where mark exposure control is performed. In this embodiment, a document for mark exposure is not required, and marks 68 are previously attached to the surface of the transparent glass 50, so that exposure control for marking is facilitated. Additionally, a manuscript dedicated to marks is no longer required.

In the next step 216, the 28 plates 14 placed on the first workbench 16 are sucked, and then in step 218, the main frame 32 is positioned on the third workbench 30. In the next step 220, the subframe body 26 is positioned on the second workbench 26. At this time, the bar 70 and the auxiliary bar 72 are moved downward in FIG. 1 (step 222). In this state, by approaching the work surface 12 toward the sub-frame body 26, the suction cup 7
6 comes into contact with the exposed 28 plate 14 placed on the second workbench 26 and is attracted (step 224).

Next, the work surface 12 is returned, the bar 70 and the auxiliary bar 72 are moved upward in FIG. It is held between a pair of rollers 88 and discharged by the conveying force of the pair of rollers 88 . As a result, the 28-plate 14 is not present on the second workbench 26, so in step 230, the 28-plate 14 that has been sucked to the suction cup 74 of the sub-frame body 26 is placed on the second workbench 26.

Further, in step 232, the document 28 adsorbed to the transparent glass 50 is discarded, and the process moves to step 234.

In step 234, it is determined whether or not to continue the exposure process, and if the determination is positive, the process moves to step 200, and if the determination is negative, the continuation routine ends.

According to this embodiment, the main frame 32 and the sub-frame 26 are installed on the guide rail 36, and the main exposure is performed on the second workbench 22 and the sub-exposure is performed on the first workbench 16. This improves overall efficiency and improves workability.

In addition, a suction cup 76 provided on the auxiliary bar 72 of the subframe body 26
Accordingly, the unexposed 28 plate 14 is carried in from the first workbench 16 and the exposed 28 plate 14 is discharged from the second workbench 22, so that the conveyance path for the 28 plate 14 is shortened. Work efficiency is further improved.

If all 28 plates 14 are to be ejected from the automatic printing plate machine 10, step 2 in the continuation routine shown in FIG.
08, Step 216, Step 230 and Step 2
It is sufficient to operate a routine in which step 34 is omitted. Incidentally, FIG. 8 shows a final routine in which the above steps are omitted.
Since each control is the same as the continuation routine shown in FIG. 7, the symbol "A" is added after the same number, and the explanation will be omitted.

〔Effect of the invention〕

As explained above, the automatic printing plate machine according to the present invention can carry out the loading and unloading of photosensitive planographic printing plates in parallel, and this parallel operation improves work efficiency and reduces the number of sheets processed per unit time. It has the excellent effect of increasing

[Brief explanation of drawings]

FIG. 1 is a front view of the automatic printing press according to this embodiment, FIG. 2 is a sectional view taken along the It-n line in FIG. 1, FIG. 3 is a sectional view showing the internal structure of the exposure device, and FIG. Plan view of exposure device, Figure 5 (
A) to (C) are explanatory diagrams showing the procedure for supplying and discharging the PS plate, No. 6
8 through 8 are control flowcharts. 10... Automatic printing plate machine, 14... PS plate, 16... First work table (photosensitive material holding table), 22...
・Second workbench (exposure table), 26...Sub frame, 30...Third workbench, 32...Main frame, 36...Guide rail, 38...Control device , 44.69... Exposure device, 70 Red... Bar 72... Auxiliary bar 74... Suction cup (first suction means), 76... Suction cup (second suction means). Figure 2 Figure 4 Figure 4 Figure (B)

Claims (1)

[Claims] (1) An exposure table that prints the image of the original onto a photosensitive lithographic printing plate, a photosensitive material holding table attached to the exposure table and on which an unexposed photosensitive planographic printing plate is placed, and the exposure table and the photosensitive material holding table. a moving member that moves on the table along a guide rail;
a first suction means provided on the moving member for adsorbing an unexposed photosensitive planographic printing plate on a photosensitive material holding table; and a first suction means provided on the moving member for adsorbing an exposed photosensitive planographic printing plate on an exposure table. a first control means for moving the moving member from the photosensitive material holding table onto the exposure table with the first suction means suctioning the unexposed photosensitive lithographic printing plate; a second control means for adsorbing the exposed photosensitive planographic printing plate on the exposure table with the second suction means and ejecting the exposed photosensitive planographic printing plate that has been adsorbed; An automatic printing plate machine comprising: third control means for positioning the unexposed photosensitive lithographic printing plate adsorbed by the first adsorption means onto an exposure table.