JP2541209B2 - Plate inspection device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a plate inspection apparatus for printing, and more specifically to 2
The present invention relates to a plate inspection device for visually inspecting whether two different plates (normally old and new) are displayed on a TV monitor in different colors in an overlapping manner and whether there are different parts.

[Prior art]

Conventionally, two plates are placed on a table, these two plates are photographed by two TV cameras, and the obtained signals are projected on the TV monitor in different colors, respectively, and then the two plates are projected. A plate inspection apparatus that facilitates comparison and visually inspects a projected image on a TV monitor is disclosed in, for example, Japanese Patent Application Laid-Open No. 57-108854.
It is known in Japanese Patent Publication No.

In addition, Japanese Patent Application No. Sho 60-213549 (Japanese Patent Application No.
-666545) is a further improved and simplified plate inspection device.

[Problems to be solved by the invention]

The invention further relates to an improvement of this type of device,
For example, it is a plate inspection device that can handle severe plate inspections such as those used for printing efficacy statements 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 apparatus using this type of TV monitor, in which at least one of the two plates on the table can be rotated by a small angle with a screw and the two plates displayed on the TV monitor are superimposed. A plate inspection device characterized in that the positions can be aligned by a pattern, and even if the positions of the two plates on the table are in a slightly twisted positional relationship, the two plates overlapped on the TV monitor are displayed. The pattern can be easily corrected by rotating the screw so that the patterns of the two plates overlap while observing the pattern of the two plates, and the two cameras always photograph the positions corresponding to the two plates exactly. It is a device.

〔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 is movable in the X and Y directions on which two plates 10 and 11 to be inspected are placed.
It has an XY table 20. XY table 20 has 2 plates
10 and 11 are fixedly placed in the correct position with register pins. Then, at least one plate is adapted to be slightly rotated with respect to the table 20. This small rotation is done by turning the screw 21, which results in 2
Even if the plates 10 and 11 are twisted with respect to the TV cameras 30 and 31, they can be corrected to correct positions. Light sources 22 and 23 for illuminating the two plates 10 and 11 with transmission, and a light source 24 for illuminating with reflection.
Four light sources 25 are provided, and when the plates 10 and 11 are of the transmissive type, the light sources 22 and 23 are turned on, and when the plates 10 and 11 are of the reflective type, the light sources 24 and 25 are turned on to illuminate each. Plate 1 above the XY table 20
TV cameras 30 and 31 for photographing 0 and 11 respectively are attached, and one camera 31 is attached so as to be finely movable in the X and Y directions, and such movement is performed by rotating screws 32 and 33. Causes a slight movement in the X and Y directions. As a result, even if the plates 10 and 11 are slightly deviated from the cameras 30 and 31 in the X and Y directions, they can be corrected. Screw 2
With 1, 32, 33, the plates 10, 11 are placed in the correct position for the camera. That is, in this plate inspection device, XY
The patterns of the two plates 10 and 11 fixedly mounted on the table 20 are photographed by the TV cameras 30 and 31, respectively, and are overlaid on the monitor TV28 and displayed in a different color. The screws 21, so that the displayed images exactly overlap.
By adjusting 32 and 33, the version 10 and 11 are TV camera 30,
It is placed in a position that corresponds exactly to 31.

The two plates 10 and 11 placed on the table 20 are TV cameras.
The corresponding portions of 30 and 31 are divided into a matrix according to the movement of the table 20 and photographed. That is, as shown in FIG. 3, in this embodiment, an image is divided into 540 rows of 18 rows and 30 columns, and as shown in the figure, addresses 1 to 540 are assigned to the respective cells. The shooting order is divided into 1st address, 2nd address, 3rd address, ..., 540th address according to the movement of the table 20, but when the number is small, or when the portion of the plate to be inspected is small ( For example, in the case where only a part of the plate has letters, etc., by specifying two addresses on the operation panel 80, the CPU 52, which will be described later, automatically controls the right angle 4 with the two addresses as diagonal lines.
Only the rectangular portion is automatically photographed, and the plate inspection described below is performed.

TV signal (analog signal) obtained from two cameras 30, 31
Is sent to the TV controller 27 and the comparator 50 as shown in FIG. From this TV controller 27 to monitor TV28
Then, the two images of the plates 10 and 11 are superposed on the monitor TV in different colors and visually inspected. The output signal from the comparator is sent to the TV controller 27 and also to the CPU 52. A memory 54 and a printer 60 are connected to the CPU 52. Further, 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 further displayed 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 a superimposed 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 in blue violet B, which is a mixture of C and M. If there are different parts,
Since that part is displayed as C or M, different parts 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, and if the two signals are different and the levels are above a certain level, it is a signal to the TV controller 27 and the CPU 52 that it is abnormal. To send. 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) if necessary, and the position of the image can be seen more clearly than when the color is changed. Whether or not 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.

Due to the abnormal output signal that the two signals are relatively different from 50 and the address signal from the moving mechanism 70, the CPU5
The number 2 can be stored in the memory 54 as to which address has different parts of the plates 10 and 11.

The memory 54 can also store the plate inspection range (addresses to be inspected) according to an instruction from the panel, and at the time of plate inspection, the range specified from the table 20 is sequentially moved to correspond to the supported range of addresses. A range of printing plates 10 and 11 is checked.

 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. When the plate inspection range is specified in advance by the panel 80, the addresses of the specified range are sequentially photographed and it is determined whether or not there is an abnormality (the signals from the two cameras have a level difference above a certain level). The address having the abnormality is stored in the memory 54. After scanning the entire area to be inspected in this way, when the operator switches on the panel, the first address among the addresses stored as abnormal in the memory 54 is shot by the TV camera. The table 20 moves, the part corresponding to the address is displayed on the monitor TV 28, and the operator visually determines whether or not the part is defective. Then, when it is determined that it is good, when the switch of the panel 80 is pressed, it is automatically moved to the next memorized address of the abnormality, and that portion is displayed and the determination is made. Similarly, the plate inspection proceeds. In this mode 1 plate inspection, the operator is not restricted by the plate inspection device during scanning.

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

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

The printer 60 prints out an abnormal address.

〔The invention's effect〕

According to the present invention, in a plate inspection apparatus using this type of TV monitor, since at least one of the two plates on the table can be rotated by a small angle by a screw, the positions of the two plates on the table can be changed. Is in a slightly twisted positional relationship,
Since the correction can be easily performed and the two cameras can always photograph the positions corresponding to the two plates exactly, it is possible to perform the accurate plate inspection.

[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 …… Version 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 Nobuyuki Shimizu (56) Reference JP-A-61-175043 (JP, A) ) JP-A-59-198156 (JP, A) JP-A-56-36264 (JP, A) JP-A-61-215551 (JP, A) JP-A-61-193154 (JP, A) Actually developed 52- 18288 (JP, U)

Claims (1)

(57) [Claims] 1. A plate inspection apparatus for displaying two plate patterns in an overlapping manner and comparing different portions of corresponding positions of the two plates to each other for printing. XY table, which is placed on the table and moves in the XY direction, and two TVs for shooting each plate placed on the table.
A camera, a monitor TV capable of displaying video signals from the TV camera in different colors and displaying them in different colors, a comparator for comparing signals from two VT cameras, and an operation panel for controlling the device, and an inspection plate for printing. In the apparatus, at least one of the two plates on the table can be rotated by a small angle with a screw and can be aligned by the pattern of the two plates displayed on the TV monitor. apparatus.