JPS63228163A - Plate inspection device - Google Patents

Abstract

PURPOSE:To prevent an operator from being restrained at the time of scanning by previously storing all the addresses where abnormality exists and successively moving only the position of the addresses where the abnormality exists automatically after all the ranges to be subjected to plate inspection are scanned. CONSTITUTION:A CPU 52 stores in which addresses of the different part of plates 10, 11 exists into a memory 54 by the abnormality output signal indicating that the two signals differ from a comparator 50 and the signal of the addresses from a moving mechanism 70. The ranges for plate inspection (addresses to be subjected to plate inspection) can also be stored in the memory 54 by the instruction from a pane. A table 20 moves in such a manner that the first address among the addresses stored as the abnormality in the memory 54 is photographed by a TV camera when the operator turns on the switch of the panel after all the ranges to be subjected to the plate inspection are scanned in such a manner. The part corresponding thereto is projected on a monitor TV 28. The operator decides visually whether that part is defective or not. The operator is thereby prevented from being restrained by the plate inspection device during the scanning.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a plate inspection device for printing, and more particularly, to a device for displaying two plates (usually an old edition and a new edition) in different colors on a TV monitor. This invention relates to a plate inspection device that visually inspects plates to see if there are any different parts.

[Subject skill]

Conventionally, two plates are placed on a table, these two plates are photographed by two TV cameras, and the obtained signals are displayed on a TV monitor in different colors, respectively. A plate inspection device that facilitates comparison and visually inspects projected images on a TV monitor is disclosed, for example, in Japanese Unexamined Patent Application Publication No. 57-1981 filed by the same applicant.
This is known from, for example, Japanese Patent No. 108854.

In addition, Japanese Patent Application No. 60-213549 filed by the same applicant is
This is a further improved and simplified plate inspection device.

[Problem that the invention seeks to solve]

The present invention further relates to an improvement of this type of device, and is a plate inspection device that can handle severe plate inspections such as those used for printing efficacy labels inserted into pharmaceutical boxes, for example.

In other words, when printing efficacy statements for pharmaceuticals, even the slightest mistake in the content cannot be tolerated, and if "ka" becomes "ga" due to dirt, etc., it will cause a big social problem. There is a risk.

In order to meet such plate inspection requirements, the present invention provides a printing plate inspection device that has been further improved.

Means for Solving Problem c] The present invention provides a plate inspection device using this type of TV monitor, in other words, when printing, the patterns of two plates are displayed in an overlapping manner, and different parts of the plates are displayed. This is a plate inspection device that compares and inspects two plates, and includes an For printing, it is equipped with a TV camera, a monitor TV that can overlay video signals from the TV camera and display them in different colors, a comparator that compares the signals from the two TV cameras, an operation panel that controls the device, etc. In the plate inspection device, the table is moved in a matrix, the part to be photographed is defined by the address of the matrix, and has a memory for storing the address, and the table is scanned and inspected by scanning two plates with the table. When printing, remember the address where the abnormality occurred.
After continuously scanning all the areas to be inspected,
This is a plate inspection device that is configured so that only addresses with abnormalities are automatically moved sequentially, making it a convenient plate inspection device as the operator is not restricted during scanning while inspecting the plate. Aderu.

〔Example〕

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

As shown in FIGS. 1 and 2, this plate inspection apparatus includes an XY table 20 movable in the X and Y directions on which two plates 10 and 11 to be inspected are placed. XY table 20
The two plates 10 and 11 are fixedly placed in the correct position in a register bin. At least one of the plates is configured to be slightly rotated with respect to the table 20. This minute rotation is made by turning the screw 21, which causes the two plates 10 and 11 to move toward the TV camera 30.
．． 31, it is configured such that even if it is in a twisted position, it can be corrected to the correct position. Light f122 to illuminate each of these two plates 10.11 through transmission
．． 23 and a light source 24.25 for illumination by reflection. If the plate 10.11 is a transmissive type, the light 11122.23 is emitted, and if the plate is a reflective type, the light source 24.2 is provided.
5 lights up to illuminate each one. TV cameras 30 and 31 for photographing each of the plates 10 and 11 are installed on the upper side of the XY table 20, and one camera 31
is attached so as to be able to move slightly in the X and Y directions, and this movement is achieved by rotating the screws 32 and 33. Thereby, even if the plates 10, 11 are slightly shifted in the X direction and the Y direction with respect to the camera 30, 31, it can be corrected. Said screws 21.32.33 place the plate 10111 in the correct corresponding position relative to the camera.

The two plates 10 and 11 placed on the table 20 are TV
Cameras 30 and 31 take photographs of corresponding portions divided into a matrix according to the movement of table 20. That is, as shown in FIG. 3, in this embodiment, there are 18 rows and 30 columns.
The image is divided into 40 parts, and as shown in the figure, each square is assigned an address from 1 to 540. By moving the table 20, the photographing order is divided and photographed in the order of addresses 1, 2, 3, . . . 540, but when the plate is small or the part of the plate that needs to be inspected is small ( For example, when there are characters only on a part of the plate, by specifying two addresses from the panel 80, a right-angled quadrilateral with the two addresses as diagonals is automatically controlled by the CPU 52, which will be described later. The configuration is such that only the portion of the image is automatically photographed and the plate inspection described below is performed.

TV signals (analog signals) obtained from the two cameras 30 and 31 are sent to a TV controller 27 and a comparator 50, as shown in FIG. Furthermore, this TV controller 27
The two images of versions 10 and 11 are displayed on the monitor TV in different colors and superimposed for visual inspection. The output signal from the comparator is sent to the TV controller 27
and is also sent to the CPU 52. A memory 54 and a printer 60 are connected to the CPU 52.

Furthermore, a moving mechanism 70 for moving the XY table 20, an operation panel 80, etc. are also connected to the CPU 52.

Now, the video signals obtained by the cameras 30 and 31 are sent to the TV controller 27, and are further displayed on the monitor TV 28 in a different color. The images from the above are displayed as magenta M overlapping each other.

(This color can be arbitrarily selected using the switch on the panel 80.

) If the two versions 10.12 have exactly the same pattern, the pattern will be displayed as Blue Violet B, which is a mixture of C and M, but if there are any differences,
Since the portion is displayed as C or M, the different portion can be easily determined by visual inspection.

On the other hand, the signals from the cameras 30 and 31 are input to the comparator 50 and compared, and if the two signals are different and their levels are above a certain level, the TV controller 27,
A signal indicating that there is an abnormality is sent to the CPU 52. The above level can be adjusted using a knob 82 on an operation panel 80. Different parts of the image on the monitor TV 2B can be flashed (blinked) as needed, so that the position can be seen more clearly than if the colors simply change. Whether or not to perform this flushing can be selected using a switch on the panel 80.

That is, it is easier to detect different positions by flashing, but it is better not to use flashing to visually determine whether the different parts are good or bad, so either can be selected.

Due to the abnormal output signal from the comparator 50 that the two signals are different and the address signal from the moving mechanism 70, the
The PU 52 can store in the memory 54 the address at which the different parts of version 10.11 are located.

The memory 54 can also store plate inspection ranges (addresses to be inspected) according to instructions from the panel, and during plate inspection, the table 20 is sequentially moved from the specified range to correspond to the addresses in the specified range. The range of version 10.11 is checked.

Next, the plate inspection work of this plate inspection device will be explained.

First, in the normal plate inspection mode (plate inspection mode 1), the plate is inspected as follows. If you specify a plate inspection range in advance using the panel 80, the addresses in the specified range are sequentially imaged and a comparator detects whether there is an abnormality (a difference in level of more than a certain level between the signals from the two cameras). 50, and the address where the abnormality occurred is stored in the memory 54. After scanning the entire area to be inspected in this way, when the operator turns on the panel, the first address among the addresses stored as abnormal in the memory 54 will be photographed by the TV camera. The table 20 moves, and the part corresponding to that address is displayed on the monitor TV 2B, and the operator visually determines whether or not that part is defective. If it is determined to be OK, a switch on the panel 80 is pressed, and the next stored abnormality address is automatically moved and that part is displayed to make a determination. Proceed with the plate inspection in the same manner.

In mode 1 plate inspection, the operator is not bound to the plate inspection device during scanning.

In the second plate inspection mode 2, when an abnormality is detected during scanning, the scanning is stopped, the quality of the address is determined, and the plate inspection can proceed to the next step.

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

Note that the printer 60 prints out abnormal addresses and the like.

〔Effect of the invention〕

Since the present invention has the above-described configuration, it has excellent practical effects as shown below. ! pchi, when printing, 2
This is a plate inspection device that displays the patterns of two plates overlappingly and compares the different parts to inspect the plate.The two plates are arranged in parallel, and an XY table that moves in the X and Y directions is mounted on the top surface of this table. Two TV cameras to bridge the arranged plates, a monitor TV that can overlap the video signals from the TV cameras and display them in different colors, and a comparator to compare the signals from the two TV cameras. In a printing plate inspection device equipped with an operation panel for controlling the device, the table is moved in a matrix, the portion to be photographed is defined by the address of the matrix, and the address is memorized. It has a memory, and when inspecting two plates by scanning them with a table, it memorizes the address where the error occurred, and after scanning the entire range to be inspected continuously, the address where the error occurred is stored. This is a plate inspection device configured to automatically move only the positions of
With this configuration, the operator is not constrained by the plate inspection device during plate inspection and scanning, resulting in a convenient plate inspection device with good work efficiency.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view showing the entire plate inspection device, FIG. 2 is a front view of the entire plate inspection device, and FIG. 3 is a perspective view showing the entire plate inspection device. Explanatory diagram showing the address of 4th
The figure is a diagram of the main plate inspection device. 10.11...plate 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...Knobs

Claims (1)

[Claims] 1) A plate inspection device that displays the patterns of two plates in an overlapping manner during printing, and compares and inspects the different parts.The two plates are placed in parallel and moved in the X and Y directions. An XY table, two TV cameras placed on the top of this table to photograph each plate, and a monitor T that can overlay the video signals from the TV cameras and display them in different colors.
In a plate inspection device for printing, which is equipped with a comparator for comparing signals from two TV cameras, an operation panel for controlling the device, etc., the table is moved in a matrix, and the portion to be photographed is It is defined by the address of the matrix and has a memory that stores the address, and when scanning two plates with a table and inspecting the plate, it memorizes the address where there is an abnormality and the range to be inspected. The plate inspection device is configured so that after successively scanning all of the addresses, only addresses with abnormalities are automatically moved one after another.