JPS6273266A - Device for inspecting transmission and reflection plate - Google Patents

Abstract

PURPOSE:To obtain a transmission and reflection plate inspecting device which inspects original plate films of block copy, proof, blue print, etc., by providing a light source both below original racks where original plate films are mounted and to a moving frame for cameras and lighting the original plate films by the light source of the moving rack through a mirror. CONSTITUTION:The light sources 70 and 72 which light reflection type original plate films 2 and 4 are fitted to the rack 50 and those light sources 70 and 72 light the reflection type original plate films 2 and 4 through mirrors 74 and 76. These light sources 70 and 72 are connected to a DC stabilized light source as well as light sources 16 and 18 and transmission/reflection selection switches 6 and/or 8 is operated according to the kinds of the original plate films 2 and 4. Namely, when the films are a reflection type, the upper light sources 70 and 72 are turned on selectively and when a transmission type, the lower light sources 16 and 18 are selected and turned on. The switches 6 and 8 are switched between right and left sides individually to select transmission or reflection, so even when a reflection and a transmission type original plate film are mounted on the racks 10 and 12 respectively, they can be inspected.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a plate inspection device for checking whether or not the designs or characters of each color original film of color printing are arranged at predetermined positions as specified. It is related to.

(Prior Art) Conventionally, a plurality of 111 (plate films) for the same printed material are processed by a plurality of TV cameras, and the images are
For example, in the same application, there is a plate inspection device that checks whether the patterns or characters on the original film of each color of color printing are arranged in the specified position as specified by turning the image on a V monitor and covering it. Japanese Patent Publication No. 58-7022 concerning humans
July Publication, JP-A-58-70228 (hereinafter referred to as 4-color plate inspection machine), Japanese Patent Application No. 60-57178, Japanese Patent Application No. 60-57
No. 179, Japanese Patent Application No. 1983-57180, Japanese Patent Application No. 1987-5
No. 7181 (hereinafter known as +2 color inspection plate (Iku)).

(Problems with the Prior Art) By the way, such conventional plate inspection devices can only inspect transparent original film, for example, reflective inspection originals such as block copies, proofs, eye engravings, etc. (simply referred to as the original film) cannot be inspected. However, there are various stages in which corrections are made in the printing process, and therefore plate inspection is required at various stages.This makes it possible to inspect original films such as block drafts, proofs, eye-prints, etc. There was a need. Regardless of the situation, such an inspection has not been possible using conventional inspection machines.

(Problems that the invention can be applied to the wl method) The present invention is as follows.
J: Ue This is an attempt to eliminate the shortcomings of the conventional technology, and it is possible to inspect 64 originals by transmitting as an original film. It is an object of the present invention to provide a plate inspection device capable of inspecting an original film and capable of transmitting and reversing 4 types of film.

(Means for solving the problem) Therefore, in the present invention, a plurality of original films are
By taking pictures with a V-camera and displaying multiple images on a TV monitor, it is possible to check whether the images or characters on the original film for each color of color printing are placed in the specified positions and as specified. In a plate inspection device for inspection, by providing a light source on both the lower side of the document holder and the movable camera holder, it is possible to photograph the original film to be inspected both in transmission and reflection. It was used as a plate inspection device.

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

In explaining this type of plate inspection (details of mounting are explained in detail in the above-mentioned patent publication, etc.)
A detailed explanation (I will omit it).

The following example describes an example of a two-color plate inspection device.

As shown in detail in FIG. 1, the two film stands 10 and 12 on which the original film 2.4 is placed are made up of a light diffusing plate 1 placed under a transparent glass plate, and further below that. is the DC stabilized voltage ti for illuminating the transmission original film lx 2.4! +J-',) I'c lost light source 16
．． 18 are arranged.

Above the film mount 10.12, a movable camera mount 50 to which two TV cameras 30.32 are attached is arranged, and this mount! ') (I L, i Y-direction movement IJ that moves only in the Y direction + Iv that is movable only in the Y direction to the mount 481, and the mount 50 is moved manually with the handle 52 to move the film mount 10. 12 can be freely moved in the X and Y directions.Thereby, the two TV cameras 30 and 32 can photograph any corresponding position on the original film 2.4.

Although not shown, one of the cameras 32 is provided with a fine adjustment mechanism in the X and Y directions, so that the position of the camera 32 with respect to the camera 30 can be adjusted by 11 times. This fine adjustment mechanism adjusts the position between the cameras 30 and 32, especially when inspecting transparent original films, and makes sure that the images of the two original films 2.4 placed in the correct positions are accurately captured. The image is superimposed on the image and displayed on the TV monitor.

Separately from this fine adjustment mechanism, a moving mechanism for moving the camera 32 in the X and Y directions is provided, and movement by this moving mechanism is achieved by rotating the moving knobs 38 and 40. will be moved. This moving mechanism is especially intended for inspection of reflective master films. That is, in the case of a reflective original film, especially an eye-printed original film, the expansion and contraction during development is large, and therefore the difference in expansion and contraction [a] between the two original images 2.4 may be large. Therefore, if the center of the two original films is set to the camera 30.
However, even if the camera is placed at a precise location, the surrounding areas may be photographed at different locations. To eliminate this inconvenience, when inspecting the original reflection film, look at the TV monitor and adjust the rotation of knobs 38 and 40. After adjusting the two images so that they overlap, a post-plate inspection process is performed.

Therefore, the movement using these knobs 38 and 40 will only operate when at least one of the selection switches 6 and 8 of (later) 4 is set to the reflective side, and when both are set to the transmitting side, adjustment is made using the fine adjustment mechanism mentioned above. (The position H of the camera 32 is automatically adjusted at the 11th position.

A light source 70.72 for illuminating the reflective original film 2.4 is attached to the pedestal 50.
72 is the original film 2 for reflection through mirrors 74 and 76.
．． Illuminate 4.

This light source 70.72, like the light source 16.18, is connected to a self-current stabilized power supply.

- Transparent, anti-04 selection switch 6 and father is 8+
O Original film 2.40 Select according to the scale.

That is, in the case of reflection, the upper light source 70.72 selectively lights up the IR white light, and in the case of transmission, the lower light source 16.18 selectively lights up. The two switches 6.8 on the left can be switched between transmission and reflection at any time, so place the original films for reflection and transmission on mounts 1(') and 12, respectively. version is possible.

Images taken with two cameras 30 and 32 (not shown) are displayed overlapping each other. Plate inspection work will be carried out using this video.

(Effects of the Invention) Since the present invention has a simple structure, it has excellent practical effects as described below, namely, proofreading and correction.
There are various stages in which F is added, but according to the plate inspection device of the present invention, it is possible to inspect not only a transparent original film but also a non-transparent original film. The plate inspection work can be done at any point in the printing process, not at the disassembly of the original film (fliI white).

Further, since the light source of the movable mount is configured to illuminate the original film through a mirror, the light source of the movable mount can be changed from one to the other.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an explanatory diagram of the main part (photographing mechanism part) of this inspection plate set. 2.4...Original film 6.8...Selection switch 10.12...Original stand 16.18.70,72...Light source 30.32...TV camera 34. 36...Lens 38.40...Movement knob 42.46...Filter 48...Y direction moving stand 50...Camera moving stand 52...Handle 54... ...Operation panel 74.76...Mirror patent application Person Toppan Printing Co., Ltd. Representative Kazuo Suzuki

Claims (1)

[Claims] (1) By photographing multiple original films with a TV camera and displaying the images of the multiple original films on a TV monitor, the designs or characters of each color of the original film for color printing are placed in the specified position. In a plate inspection device that checks whether the original film has been placed as specified, a light source is provided on both the lower side of the document holder on which the original film is placed and the movable holder of the camera, and the light source of the movable holder is provided through a mirror. A plate inspection device for both transmission and reflection, which is characterized by illuminating an original film.