JPS645698B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scribing device, and more specifically, to a device for printing a desired number of images of one film original (hereinafter referred to as "original image") onto a photosensitive plate. The present invention relates to a device which can be attached to a plate printing machine and can be used to perform desired marking work by operating the mechanism equipped on the plate printing machine and the mechanism equipped in the device of the present invention. It is something.

In platemaking work, it is a common experience to print a mixture of original images of different sizes and designs on a single photosensitive plate. The work to create this has so far been based on the following:

That is, as shown in Figure 1A, the position of the register mark printed around the original image to be printed is measured using a scale, and this is then measured using a scale using arbitrary cardboard or an old photosensitive plate. On the original board 1, marks and register marks 2 are applied manually using a ruler or the like, or by using an independent drawing device or the like. Next, on the original plate 1 shown in Fig. 1A, on which the Resister mark 2 was marked,
As shown in Figure 1B, use a cutter knife to cut out a semicircular or triangular shape using the register mark 2 as a base line, and make a cutout hole 3 for forming a register mark on the photosensitive plate on which the original image is to be printed. Then, a lining paper 1' is prepared.

Therefore, place this scribing mount 1' on the unexposed photosensitive plate 4 to be printed (see Figure 1 C), and insert the writing instrument through the cutout hole 3 while keeping the peripheral edges well aligned. Then, register marks 2' are sequentially written on the photosensitive plate 4. In this way, register marks 2' are formed at desired positions on the photosensitive plate 4, as shown in FIG. 1D.

Then, the film original 5 is placed on the photosensitive plate 4, and the register mark written on the photosensitive plate 4 is placed on the photosensitive plate 4.
The mark 2' is aligned with the register mark 2'' printed around the original image 6, and the periphery of the film original 5 is fixed with adhesive tape 7. In this way, the film original 5 is accurately placed on the photosensitive plate 4. After positioning them, they are fixed one after another (see Figure 1 E).

By following the above steps, a photosensitive plate 4 is formed on which film originals 5 of different sizes and patterns are pasted, and this photosensitive plate 4 is baked in a contact printing machine (not shown) to create a printing plate. -ing

By the way, it is a fact that does not require explanation that the printing plate printed as described above is run on a printing machine, and at this time, the image on the printing plate is transferred to the printing paper, resulting in the desired printed matter. In order to obtain color printed matter, for one original image, red version, yellow version,
Four-color printing plates for the indigo and black versions are required, and in order to create each of these plates, it is natural to create one original image for each plate, each consisting of halftone dots of a desired size. A total of four film originals are prepared for photographing, one at a time, and each film original is printed on a separate photosensitive plate 4 by repeating the procedure explained with reference to FIG. 1 four times. According to the conventional method, the base line of the cutout hole 3 itself becomes uncertain due to a slight difference in the angle of the knife when forming the cutout hole 3, and the cutout hole 3
Due to the slight difference in the direction of the writing instrument when marking the register mark 2' on the photosensitive plate 4 through the pen, a slight deviation occurs in the position of the register mark 2' for each plate, and as a result, in the printed matter, the plate In many cases, color misregistration occurs at different times.

In addition, in the conventional method, the lining paper 1'
This involves the complicated and inefficient work of creating a marking board 1' and applying register marks 2' to the photosensitive plate 4 from the marking board 1', which is also a drawback that cannot be ignored.

Now, most plate-making workshops are equipped with the above-mentioned printing presses as a necessity for the work carried out there, and these printing presses are becoming more automated and more sophisticated year by year. The mechanism for moving the document holder that holds the film document in a required direction and stopping and fixing it at a required position, that is, the document holder positioning mechanism, has also been automated.
The precision of positioning the document holder at that time has shown perfect results.

The present invention has been proposed in view of the above, and has an object to provide a scribing device that enables accurate and highly efficient scribing work that eliminates all the defects associated with the scribing work of the conventional method described above. In order to achieve this objective, we aim to make effective use of the printing press, which is equipped in most plate-making workshops and has excellent performance. A detailed description will be given below with reference to the accompanying drawings showing.

As mentioned above, the marking device according to the present invention is configured to be attached to a printing press, and operating the printing printing machine involves operating the device to perform the desired marking work. First, an example of a known printing press will be briefly explained with reference to FIG. 2.

This figure is a front view of the entire rigid plate printing machine, and is 8
is a base, and a pair of columns 9, 9' are erected at the rear of this base 8, and a photosensitive plate holder 11 holding the photosensitive plate 4 is supported by these columns 9, 9'. .

Reference numeral 12 denotes a support stand mounted on the base 8 so as to be able to freely engage on the feed screw 13, and by operating the feed screw 13, the support stand 12 can move on the base 8. It slides left and right.

The support base 12 also has a pair of guide rails 14,1.
4' are erected, and furthermore, this guide rail 14,
A moving frame 15 is placed between the guide rails 14 and 14'.
4' so as to be movable up and down, and furthermore, at the lower end of this moving frame 15, a support stand 1 is provided.
A guide rod 17 is fixedly installed that engages a pair of feed screws 16, 16' vertically provided on the top of the feed screw 2, and by operating the feed screws 16, 16',
The guide rod 17 and the moving frame 15 are connected to the guide rail 14,
14', it moves up and down integrally.

The moving frame 15 also includes a translucent plate 18 for placing an original.
A document holder 19 on which a paper is stretched is removably fitted, and the document holder 19 can be moved toward and away from the photosensitive plate 4, although its mechanism is not shown.

The method of operating the printing press having the above-mentioned structure to perform exposure printing is as follows.

That is, first, a document (not shown) is mounted on the transparent plate 18 for document placement of the document holder 19, and then the horizontal feed screw 13 and the vertical feed screws 16, 16' are operated as desired. The moving frame 15, that is, the document holder 19, is moved along the surface of the photosensitive plate 4 attached to the photosensitive plate holder 11, and the photosensitive plate 4 is moved.
Stop at the desired burning position on the surface. Therefore, the mechanism for bringing the original holder 19 into contact with the photosensitive plate 4 is activated to bring the original holder 19 into close contact with the photosensitive plate 4, and the vacuum mechanism (not shown) is activated to bring the original and the photosensitive plate 4 into vacuum contact. In this state, a light source lamp (not shown) is turned on for a desired amount of time, and the original image is printed at a predetermined location on the surface of the photosensitive plate 4.

By repeating the above operations, one document image is sequentially printed on a plurality of predetermined locations on one photosensitive plate.

The apparatus of the present invention has a document holder 19 of the plate printing machine.
It is constructed so that it can be installed in place of the other one, and will be described in detail below with reference to FIGS. 3 to 6.

In these figures, reference numeral 20 denotes a cross-shaped base frame that is partitioned at the center by a left frame 20A, a right frame 20A', an upper frame 20B, and a lower frame 20B'. A fitting hole 21 is bored.

Therefore, in order to install this device on a plate printing machine,
A pin 22 protruding from the front surface of the movable frame 15 of the plate printing machine is fitted into the fitting hole 21, and the pin 22 is tightened and fixed using an appropriate fastener (not shown).

Next, each frame of the base frame 20 has a guide groove 2 of a desired length.
3 are drilled in each guide groove 23, and a position setting body that is engaged with a feed screw and holds a writing instrument is fitted in the guide groove 23 so that it can be slid while being prevented from rattling. I will explain about it.

That is, 24 is a position setting body, which is attached on the base frame 20 in parallel with the base frame 20, and one end is connected to the rotating shaft 26 of the pulse motor 25. The feed screw 27 is in mesh with the feed screw 27, so that the position setting body 24 meshes with the feed screw 27 by operating the pulse motor 25 and rotating the feed screw 27. However, as is clear from FIG. 5, the other bottom of the position setting body 24 is fitted tightly and slidably into the guide groove 23 of the base frame 20, so that the base can be positioned without wobbling in the slightest. It moves on the frame 20.

Furthermore, as is clear from FIG. 4, a writing instrument holding cylinder 28 is hung vertically on the position setting body 24.
A fastener 2 is provided at the upper position of this writing instrument holding cylinder 28.
9 is tightened and held, and the writing instrument holding cylinder 28 is secured to the position setting body 24 by this fastener 29.
while the jaw 28' formed at the bottom
and the position setting body 24
Since it is pulled downward by the position setting body 24, it is firmly held by the position setting body 24.

Further, the writing instrument 31 is fitted into the writing instrument holding cylinder 28 so that only the tip part is exposed.
The writing instrument 31 is screwed and fixed to the writing instrument holding cylinder 28 by a threaded portion 31' formed at the top.

Furthermore, both the left and right axes and the up and down axes have a feed screw 27.
Since the screw grooves are carved in opposite directions with the center support frame 32 as the border, for example, if the pulse motor 25 on the left frame 20A is operated, the equipment on the left frame 20A and the right frame 20A' will be removed. position setting body 2
4 are moved toward and away from the center at equal distances from the center to the left and right, and when the pulse motor 25 on the upper frame 20B is operated, the position setting bodies 24 installed on the upper frame 20B and the lower frame 20B' are moved to the center. It is designed to approach and separate at equal distances above and below.

Furthermore, in the embodiment shown in FIG. 4, the writing instrument 31 is configured to be screwed and fixed into the writing instrument holding tube 28 by a threaded portion 31' formed at the top, and the writing instrument holding tube 28 In other words, the writing instrument 3 is configured to be virtually fixed to the position setting body 24 by the bullet body 30 and the fastener 29.
1. Although it is configured so that it does not operate independently, it is an operating means of a writing instrument that has been adopted in conventionally known drawing instruments, etc., that is, the writing instrument can be moved out and back at will with respect to the scribing surface (drawing surface). Of course, it is also free to configure and equip the system in this manner, and just to be sure, an example of such a configuration will be explained with reference to the drawings (FIG. 7).In the following explanation of the operation of the present invention, As shown in the fourth diagram, the writing instrument 31 is configured so that it does not operate by itself, and in order to move the writing instrument 31 back and forth from the scribing surface, the entire device of the present invention must be moved toward and away from the scribing surface. According to writing instrument 31
The explanation is based on the case where the line is substantially moved back and forth with respect to the scribed surface.

Therefore, to explain based on FIG. 7, the position setting body 24, the writing instrument holding cylinder 28 having a jaw part 28' at the lower part, and the writing instrument 3 screwed and fixed in the holding cylinder 28.
1. The configurations of the fastener 29, the projectile body 30 interposed between the jaw 28' and the position setting body 24 are the same as the example shown in FIG.

In this example, the iron core 33 is fixedly attached to the top of the writing instrument 31, and an electromagnetic solenoid 34 is installed to attract and release the iron core 33.
Thus, by keeping the electromagnetic solenoid 34 energized except during marking,
Using the elastic force of the bullet body 30, the iron core 33 is attracted to the electromagnetic solenoid 34, the writing instrument 29 is isolated from the scribing surface for an arbitrary period of time, and the energization to the electromagnetic solenoid 34 is stopped only when scribing. If so, the iron core 33 adsorbed by the electromagnetic solenoid 34 is released, and at this time, the writing instrument 31 is pulled toward the scribing surface by the elastic body 30 and comes into contact with the scribing surface. In this case, there is no need for a mechanism for bringing the entire device of the invention closer to the scribing surface.

The present invention is constructed as described above, and the procedure for operating the present device to perform a desired marking operation will be described below.
This will be explained with reference also to FIGS. 1 and 2.

First, using a well-known operation panel (not shown) for the original document holder positioning mechanism attached to the plate printing machine, each film original is placed one by one in accordance with the preset placement of each film original on the photosensitive plate. It is set and memorized as follows.

That is, there are, for example, five film originals A, B, C, D, and E to be printed on one photosensitive plate, and due to the arrangement of each film original, the registers are placed in the order of C, B, A, D, and E.・When placing marks on the photosensitive plate, first set the placement position of the film original C on the photosensitive plate, and then set the writing positions of the upper, lower, left and right register marks according to the size of the film original C. do. Thereafter, film originals B, A, D, and E are also set in the same manner.

Meanwhile, in parallel with this operation, the photosensitive plate 4 is attached and fixed to the photosensitive plate holder 11 as shown in FIG.

Next, when the operation start button on the operation panel for the positioning mechanism of the document holder 19 is pressed, the left and right feed screws 13 and the vertical feed screws 16 and 16' are operated by the required amount, and the moving frame 15, that is, the device, moves by the required amount. It is moved to the placement position of the film original C set above and stopped.

In addition, during the above operation, the pulse motor 2 of this device
5 are rotated by the required amount, and at the same time, the feed screws 27 are also rotated by the required amount, so that the respective position setting bodies 24, that is, the writing instruments 31, can write the register marks on the film original C set above. be moved to a certain position.

Subsequently, the mechanism for moving the document holder 19 toward and away from the photosensitive plate 4 of the plate printing machine is activated, and the moving frame 15 approaches the photosensitive plate 4. At this time, the writing instrument 31 is moved against the photosensitive plate 4.
Touch with light pressure.

Subsequently, each pulse motor 25 rotates by an amount to move the writing instrument 31 by a pitch (approximately 10 mm) in a predetermined direction, thereby completing writing of the register mark on the film manuscript C. .

Following the above operation, the original holder 1 of the plate printing machine
The approaching/separating mechanism 9 is activated, and the device is separated from the photosensitive plate 4 by a booth, and the document holder positioning mechanism is activated to move it to the position where the next film document B set above is placed. .

At this time, as described above, the pulse motors 25 of this device also rotate by the required amount to rotate the feed screws 27 by the required amount, so each position setting body 24, that is, the writing instrument 31 is set as described above. The film document B is then moved to the writing position of the register mark on the film document B.

Therefore, the document holder 19 provided in the plate printing machine
When the writing instrument 31 is pressed against the photosensitive plate 4 by the contact/separation mechanism, each pulse motor 25
is a writing instrument 31 for writing the register mark.
The film original B rotates by an amount that moves the
A register mark is written to.

The same operation is repeated thereafter, and the film original A,
Register marks D and E are written in sequence, and register marks 2' are formed at required positions on the surface of the photosensitive plate 4, as shown in FIG. 1D.

It should be noted that the continuous operation of each mechanism as described above can be easily accomplished by making full use of known electric and electronic means, and therefore will not be described in detail.

When the register marks 2' have been formed at the desired positions on the surface of the photosensitive plate 4 in this manner, the photosensitive plate 4 is removed from the plate printing machine, and as shown in FIG.
All that is required is to attach the respective film originals 5 and then print them using a contact printing machine.

As is clear from the above description, the present invention eliminates the work of creating a scribing mount 1 and scribing register marks using it, which are operations that are inevitably inaccurate, which are necessary in the conventional method. By eliminating this, we have fulfilled the basic requirements for ensuring the accuracy of the scribing position of register marks.
In particular, in the present invention, in order to thoroughly ensure the accuracy of the scribing position of the register mark, the writing instrument is set on the scribing position of the register mark,
Since we have made it possible to operate the writing instrument and scribe the register mark on the same trajectory, we can place the writing instrument precisely at the starting position of the register mark and operate the writing instrument there. , the consistency (completeness) of the orientation of the register mark is automatically ensured, that is, extremely high positional accuracy is achieved for the scribing position of the register mark.

Further, in the present invention, since it is possible to simultaneously write four register marks at the top, bottom, left, right, and center of the document image necessary for one film document, speed of operation is also achieved.

Furthermore, the present invention is designed to make effective use of the features of the printing press, which is equipped with a precise feeding function in the X and Y directions, so it is desirable to operate the printing plate with maximum efficiency. This also meets the intentions of those who use printing presses and has high practical significance.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the process of scribing and pasting work according to the conventional method. FIG. 2 is a schematic front view of a known printing press. FIG. 3 is a top view of the device of the present invention. FIG. 4 is an enlarged longitudinal sectional view taken along the line A--A in FIG. 3. Figure 5 shows
FIG. 3 is an enlarged vertical cross-sectional view taken along line BB in FIG. 3. FIG. 6 is a related explanatory diagram of the moving frame, document holder, and base frame with some structures omitted. FIG. 7 is another embodiment diagram corresponding to FIG. 4. Explanation of symbols, 2, 2'2''...Register mark, 4...Photosensitive plate, 5...Film original, 6...
...Original image, 11...Photosensitive plate holder, 15...
Moving frame, 19... Original holder, 20... Base frame,
23... Guide groove, 24... Position setting body, 25...
Pulse motor, 26... Rotating shaft, 27... Feed screw, 31... Writing instrument.

Claims (1)

[Scope of Claims] 1. A cross-shaped base frame that is partitioned at the center by a left frame, a right frame, an upper frame, and a lower frame; and a cross-shaped base frame that is attached to the base frame in parallel with the base frame. two orthogonal feed screws; a position setting body that is meshed with the feed screws and is slidably attached to each of the frames, one of which is attached to each of the frames; It consists of a writing instrument supported upright facing a surface, and a precision rotation drive source for rotating each of the above-mentioned feed screws in forward and reverse directions. A marking device configured such that the base frame can be attached to a mounting portion of a document holder that is precisely driven in the XY directions.