JPH0644144B2 - Plate inspection device - Google Patents

Description

The present invention relates to a plate inspection apparatus for printing, and more specifically, it displays two plates (usually an old version and a new version) on a TV monitor in different colors in an overlapping manner. The present invention relates to a plate inspection device for visually inspecting whether or not there is a different portion by comparing them.

[Prior art]

Conventionally, two plates are arranged on a table, and these two plates are photographed by two TV cameras, and the obtained signals are projected in different colors on a TV monitor, and the two plates are compared. A plate inspection device that facilitates the above-mentioned process and visually inspects a projected image on a TV monitor is disclosed in, for example, Japanese Patent Application Laid-Open No. 57-10885.
It is known in Japanese Patent No. 4, etc.

Japanese Patent Application No. 60-213549, which is assigned to the same applicant, is a further improved and simplified plate inspection device.

[Problems to be solved by the invention]

The present invention further relates to an improvement of this type of device, and is a plate inspection device that can be used for severe plate inspection such as used for printing effect writing to be inserted in a medicine box.

In other words, in the case of printing the efficacy statement of pharmaceuticals, even if a little mistake is not allowed in the content, if "ka" becomes "ga" due to the attachment of dust etc., it causes a big social problem. There is a risk.

The present invention provides a plate inspection apparatus for printing, which is further improved in order to meet such a plate inspection request.

[Means for solving problems]

The present invention relates to a plate inspection device using this type of TV monitor, that is, a plate inspection device for displaying patterns of two plates in an overlapping manner when printing, and comparing different parts to perform plate inspection. And, an XY table in which two plates are arranged in parallel and moving in the XY directions, two TV cameras for shooting each plate arranged on the table top, and a video signal from this TV camera. In a plate inspection device for printing, which is equipped with a monitor TV capable of displaying in different colors by overlapping with each other, a comparator for comparing signals from two TV cameras, an operation panel for controlling the device, and the like, the table is The area that is moved and photographed in a matrix is defined by the addresses of the matrix, and has a memory that stores the addresses, and when scanning two plates with a table and inspecting them, It is a plate inspection device that is configured to memorize the addresses that have always existed, scan all the areas to be inspected continuously, and then sequentially move only the positions of the addresses that have an abnormality to the automatic machine. This is a convenient plate inspection device because the operator is not restricted during scanning during plate inspection.

〔Example〕

 The present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, the plate inspection apparatus includes an XY table 20 on which two plates 10 and 11 to be inspected are placed and movable in the X and Y directions. XY table 20
The two plates 10 and 11 are fixedly mounted in proper positions by register pins. At least one of the plates is minutely rotated with respect to the table 20. This minute rotation is performed by turning the screw 21, so that the two plates 10 and 11 are mounted on the TV camera 3
Even if the position is twisted with respect to 0 and 31, it can be corrected to a correct position. Light source 2 for illuminating each of these two plates 10 and 11 with transmission
2 and 23 and 4 of light sources 24 and 25 for illuminating by reflection
Two light sources are provided, and the light sources 22 and 23 are used when the plates 10 and 11 are transmissive, and the light sources 24 and 25 are used when they are reflective.
Lights up to illuminate each. TV cameras 30 and 31 for photographing the plates 10 and 11 are attached to the upper side of the XY table 20, and one camera 31 is attached so as to be finely movable in the X and Y directions. By rotating the screws 32 and 33,
Move slightly in the Y direction. Thereby, even if the plates 10 and 11 are slightly deviated from the cameras 30 and 31 in the X direction and the Y direction, the correction can be performed. The screws 21, 32, and 33 allow the plates 10 and 11 to be placed at positions corresponding to the cameras correctly.

The two plates 10 and 11 placed on the table 20 are TVs.
Corresponding portions are divided by the cameras 30 and 31 into a matrix according to the movement of the table 20 and photographed. That is, as shown in FIG. 3, in this embodiment, there are 540 rows and 30 columns.
The images are divided into two parts and photographed, and as shown in the figure, addresses 1 to 540 are assigned to each square. The shooting order is 1st address, 2nd address, 3rd address ...
... The images are divided into images in the order of 540, but if the plate is small, or if the part of the plate to be inspected is small (for example, if only a part of the plate has letters), By designating two addresses on the panel 80, the CPU 52, which will be described later, automatically controls only the right-angled quadrilateral part having the two addresses as diagonal lines to be automatically photographed, and the plate inspection described below is performed. Is configured to.

TV signals (analog signals) obtained from the two cameras 30 and 31 are sent to the TV controller 27 and the comparator 50 as shown in FIG. Furthermore, this TV controller 27
From the monitor 10 to the monitor TV 28, the two images of the plates 10 and 11 are displayed on the monitor TV in a different color in an overlapping manner and visually inspected. The output signal from the comparator is the TV controller 27.
And also to the CPU 52. A memory 54 and a printer 60 are connected to the CPU 52. Further, the CPU 52 is also connected to a moving mechanism 70 for moving the XY table 20, an operation panel 80, and the like.

Now, the video signals obtained by the cameras 30 and 31 are sent to the TV controller 27, and further projected on the monitor TV 28 in another color. For example, the image from one camera 30 is displayed as cyan C, and the image from the other camera 31 is displayed as magenta M in an overlapping manner.

(This color can be arbitrarily selected with the switch of the panel 80.) If the two plates 10 and 12 have exactly the same pattern, the pattern is displayed by blue violet B which is a mixture of C and M. If there is a different portion, that portion is displayed as C or M, so that the different portion can be easily judged visually.

On the other hand, the signals from the cameras 30 and 31 are input to the comparator 50 and compared with each other. If the two signals are different and their levels are above a certain level, the TV controller 27, C
A signal indicating an abnormality is sent to the PU 52. The level can be adjusted by the knob 82 of the operation panel 80. Then, the different portion of the image on the monitor TV 28 can be flashed (blinking) as needed, and the position can be more clearly understood than simply changing the color. Whether to perform this flushing can be selected by a switch on the panel 80. That is, it is easier to find the different positions by flushing, but it is better not to perform the flushing to visually judge whether the different parts are good or bad. Therefore, either one can be selected.

By the abnormal output signal that the two signals are different from the comparator 50 and the address signal from the moving mechanism 70, C
The PU 52 can store in the memory 54 what address the different parts of the plates 10 and 11 are.

The inspection range (addresses to be inspected) can also be stored in the memory 54 according to an instruction from the panel, and at the time of inspection, the range sequentially designated from the table 20 is sequentially moved to correspond to the instructed range of addresses. The range of the printing plates 10 and 11 to be printed is inspected.

Next, the plate inspection work of this plate inspection apparatus will be described.

First, in the normal plate inspection mode (plate inspection mode 1), plate inspection is performed as follows. If the plate inspection range is designated in advance by the panel 80, the comparator 50 determines whether or not the addresses in the designated range are sequentially photographed and there is an abnormality (the signals from the two cameras have a certain level difference or more). And the address having the abnormality is stored in the memory 54. After scanning the entire range to be printed in this way, when the operator switches on the panel, the first address among the addresses stored in the memory 54 as an abnormality is shot by the TV camera. The table 20 moves, a portion corresponding to the address is displayed on the monitor TV 28, and the operator visually determines whether or not the portion is defective. Then, when it is determined that it is good, the switch of the panel 80 is pressed, and the next automatically stored address of the abnormality is automatically moved, and that portion is displayed for determination. Similarly, the plate inspection proceeds.
In this mode 1 plate inspection, the operator is not restricted by the plate inspection device during scanning. In particular, when comparing the originals with each other, it is the case of comparing the original created first and the modified original, in which case the following two points are confirmed. Whether the planned part (corrected part) has been modified. Are there any mistakes in the areas other than planned (when the film is turned over and dust, film scraps, etc. are attached and turned over together)? Therefore, it is correct that the plate inspection device determines that there is an abnormality, and that the plate inspection device does not determine that an abnormality is correct, and these are stored together. Therefore, it is absolutely necessary for the operator to confirm whether the operation is normal or abnormal, and this determination can be made collectively, resulting in good work efficiency.

In the second plate inspection mode 2, it is also possible to stop the scanning at the time when an abnormality is detected during scanning, determine whether the address is good or bad, and perform the plate inspection so as to proceed to the next.

In the third plate inspection mode 3, each time the switch of the panel 80 is pressed, the address to be plate-inspected advances by one.

The printer 60 prints out an abnormal address or the like.

〔The invention's effect〕

Since the present invention has the above-described structure, it has excellent practical effects as shown below. That is, when printing, a pattern inspection apparatus that displays patterns of two plates in an overlapping manner and compares the different portions to perform plate inspection, in which the two plates are arranged in parallel and moved in the XY directions. XY table, 2 for shooting each plate placed on the table top
Printing with one TV camera, a monitor TV that can display video signals from this TV camera in different colors and display them in different colors, a comparator that compares signals from two TV cameras, an operation panel that controls the device, etc. In the plate inspection device for
The table is moved in a matrix form, and a portion to be photographed is defined by the address of the matrix, and has a memory for storing the address, and when two plates are scanned by the table and the plate is inspected, an abnormal condition is detected. It is a plate inspection device configured to store the existing address, scan the entire area to be inspected continuously, and then automatically move only the position of the abnormal address. Since the operator is not restricted by the plate inspection device during the plate inspection during scanning due to the configuration, the plate inspection device has good working efficiency and is convenient.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view showing the whole of the plate inspection apparatus, FIG. 2 is a front view of the plate inspection apparatus, and FIG. Explanatory drawing showing the address of No. 4,
The figure is a block diagram of the plate inspection apparatus. 10, 11 ... Edition 20 ... Table 21, 32, 33 ... Screws 22, 23, 24, 25 ... Light source 27 ... TV controller 28 ... Monitor TV 30, 31 ... Camera 50 ... Comparator 52 ... CPU 54 ... memory 60 ... printer 70 ... table moving mechanism 80 ... operation panel 82 ... knob

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Suzuki 1-5-1 Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. Examiner Baku Tokuzo (56) Reference JP-A-57-108854 (JP , A) JP 50-127574 (JP, A) JP 53-117978 (JP, A) JP 56-100416 (JP, A)

Claims (1)

[Claims] 1. A printing plate inspection apparatus which displays patterns of two plates in an overlapping manner and compares the different portions to each other for printing when printing, wherein the two plates are arranged in parallel and XY. XY table that moves in any direction, two TV cameras for shooting each plate placed on the table, a monitor TV that can display video signals from the TV cameras in different colors, and two TV cameras. In a plate inspection device for printing, which comprises a comparator for comparing signals from a TV camera, an operation panel for controlling the device, etc., the table is moved in a matrix shape, and a portion to be photographed is an address of the matrix. It has a memory for storing the addresses defined by the above, and when scanning two plates with a table and inspecting them, the addresses that have an abnormality are stored and the range to be inspected is stored. After scanning continuously Te, abnormalities there was movement position only sequential automatic machine address configured to cause out movies on the monitor TV a plate inspection device.