JPH08334469A - Detector for package such as tablet - Google Patents

Abstract

PURPOSE: To uniformly irradiate a subject of a package with an irradiation light, photograph it with a camera without any light spot generation, detect a defective at high inspection accuracy, and enlarge inspection items. CONSTITUTION: The package detector comprises a lighting mechanism 3 composed of a light source 1 such as a stroboscope and a shading case 2, and a camera 4 connected to an image processing system 5 and an image of a package (A) is so imaged as to be photographed with a camera by irradiation with an illumination light from the light source 1 of a lighting device. It is also provided with the cylindrical shading case 2 which is arranged concentrically to and right under a lens 4 of the camera 4 arranged on the packaged good (A) and whose top face is formed into a dome-like curved reflection face 2 for generating a reflection light refracting downward, a light source 1 provided in the internal circumference of the shading case, and a diffusion plate 6 having a transparent hole 10 in its center in the bottom part of the light source 1. Light composed of the reflection light, transmission light, and direct light is uniformly projected on a subject by preventing the illumination light from the light source from directly being projected on the subject so that generation of light spot is prevented, the image of the camera is clarified, and a defective is detected at high inspection accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging inspection line for packaging products such as tablets and capsules such as pharmaceuticals and foods, which are chipped, cracked, foreign matter such as hair, film scrap,
The present invention relates to a package inspection device for tablets and the like for inspecting the adherence and mixing of chips such as chipped chips and other debris by capturing an image with a camera.

[0002]

2. Description of the Related Art Generally, in a PTP packaging inspection line for tablet packaging, an image processing apparatus is provided for automating the inspection of foreign matter adhesion and foreign matter contamination in a packaged product in which a PVC sheet is welded and packaged on an aluminum plate. Is used. It is known that the image processing apparatus takes a clear image by a camera and illumination to make a distinction. And the PTP sheet packaging has a shape that matches the shape of the tablets and the like inside, and even if it is directly irradiated with light such as a fluorescent lamp, strobe, or halogen, it will be affected by the reflection on the surface of the PTP film. Although a filter is added to the illumination to prevent reflection on the sheet, the present condition is that the inspection items are limited to the degree of tablet chipping and foreign matter adhesion.

[0003]

In the image processing of the conventional PTP package inspection apparatus, as shown in FIG. 7, the PTP package product a is directly photographed by irradiating the fluorescent lamp b, halogen or strobe illumination from above. As shown in FIG. 6 (b), the problem is that the illumination light strikes the package a, and light unevenness particularly occurs in the uneven portion of the PTP package, and even if the tablet portion is detected well,
It is difficult to detect foreign substances and adhering substances that are mixed around it, and only foreign substances that are black can be detected, and there are some that pass through a polarizing filter c to prevent light spots, but the detection items are still limited, and packaging sheets Another problem is that it depends on the material. In particular, even if vinyl chloride (PVC) is used in PTP packaging, it can be inspected, but polypropylene (PP), which has recently been recommended for pollution-free disposal,
When a resin sheet such as CPP is used, there is a defect that detection becomes impossible or the inspection accuracy deteriorates extremely. The present invention is intended to eliminate these conventional drawbacks, and prevents the illumination light from the light source from directly illuminating the subject so that the light composed of reflected light, transmitted light and direct light is evenly applied to the subject. Preventing the occurrence of defects, clearing the image of the camera and detecting defective products with high inspection accuracy, ensuring stable and reliable inspection even on high-speed lines, and detecting not only lock surfaces but also seal defects and sheet foreign matter. An object of the present invention is to provide a packaged product inspection device for tablets and the like that can easily cope with the expansion of inspection items and the diversification of packaged products.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a light source such as a strobe and a light-shielding case, and a camera connected to an image processing system. In a package inspection device that captures an image of a package by irradiation with a camera and processes the image, a cylindrical light shielding case is arranged concentrically directly below the camera arranged on the package, and the top surface of the light shielding case is placed downward. The light source is provided on the inner periphery of the light shielding case and is formed on a dome-shaped reflecting surface that produces reflected light refracted in the direction of, and a diffusion plate having a through hole in the center below the light source.

[0005]

[Function] A defective product or a defective product is detected by irradiating strobe illumination light onto the upper part of the package on the package conveying line or the visual inspection table and processing the image photographed by the camera with the image processing system to detect foreign matter mixture and adhesion and detect the foreign matter. However, most of the illumination light from the light source irradiates the upper part of the package through the through hole as indirect light reflected by the reflection surface of the light shielding case, and the transmitted light and direct light transmitted through the diffusion plate are It is included as a part and irradiated to evenly illuminate the subject to ensure stable and reliable quality with high accuracy without light spots. Moreover, not only the lock surface but also the sheet defect and the sheet foreign matter are detected and inspected. It is possible to perform inspections that can easily respond to the expansion of items and diversification of packaged items.

[0006]

1 to 3, an illumination mechanism 3 including a light source 1 such as a strobe and a light shielding case 2 and a camera 4 connected to an image processing system 5 will be described. A video camera or a CCD camera, which is arranged on the package A in a package inspection device in which an image of the package A is captured by the camera 4 by irradiation of illumination light from the light source 1 of the illumination mechanism and image processing is performed. deploying a cylindrical shielding case 2 coaxially directly below the lens 4 ₁ of the camera 4,
The top surface of the light-shielding case 2 is formed as a dome-shaped curved reflecting surface 2 ₁ that produces reflected light that is refracted downward, and a light source 1 of a circle line provided on the inner circumference of the light-shielding case and a center below the light source 1 are formed. Since the diffusion plate 6 having the through holes 10 is provided, the device for inspecting packaged products such as tablets is provided.

The light-shielding case 2 includes a half mirror 7 having a 50% translucency at a portion facing the lens 4 _{1 of the} camera 4 at the center of the top surface thereof, which has good light-collecting properties and causes light spots. Without taking into consideration that the entire subject of the package A is not darkened, the light is evenly illuminated. As the light source 1 of the illumination mechanism 3, stroboscopic illumination is used, but a fluorescent lamp, a halogen lamp, or the like may be used, and in any case, the direct light that hits the subject is about 40% or less of the total light amount. The indirect light including the transmitted light is mainly used for the package A as shown in FIG.
The consideration of the reflective surface 2 ₁ to hit evenly on top, Aru choose in relation to hole 10 of the arrangement of the top wall and the light source 1 of the light shielding case 2.

The light-shielding case 2 is fixedly mounted on a stand or other fixed frame with an interval at an inspection position where it runs at a high speed on the transfer line 9 by the mounting frame body 8. After the process or as a set at the installation place on the inspection table, the lock surface of the package A and its surrounding seal defect,
The sheet is checked for foreign matter.

In the example shown in FIG. 4, the projection light is evenly applied to the subject by the reflected light as an uneven surface which is divided into small sections on the inner surface side of the top surface of the light shielding case 2 into a projecting spherical curved surface 2 _2. Is.

[0010] In the example of FIG. 5, the inner surface side of the top surface of the light shielding case 2 is divided into small sections, which was formed into a dome-shaped reflecting surface as polygonal surfaces 2 ₃ and is irradiated in different directions Irradiation light is evenly applied to the object of the package A by reflected light. In this case, the light shielding peripheral wall 11 may be provided downward along the circle line of the light source 1 to directly adjust the light amount, or the light shielding case 2 may be provided with the ventilation port 12 to have a heat dissipation function. It can also be done.

[0011]

The present invention comprises an illumination mechanism consisting of a light source such as a strobe and a light shielding case, and a camera connected to an image processing system. In a package inspection device that captures an image with a camera and processes the image, a cylindrical light-shielding case is provided concentrically immediately below the camera arranged on the package, and the reflected light that refracts the top surface of the light-shielding case downward. The light source provided on the inner circumference of the light-shielding case and the diffuser plate having a through hole in the center below the light source are provided on the dome-shaped reflecting surface, and the illumination light from the light source is directly captured on the subject. The reflected light, the transmitted light and the direct light are evenly applied to the subject to prevent the occurrence of light spots, the image of the camera is made clear and the defective product is detected with high inspection accuracy. To ensure the boss was a reliable test,
Moreover, not only the lock surface but also the poor seal and the foreign matter on the sheet are detected, and it is possible to easily deal with the expansion of inspection items and the diversification of packaged items.

[Brief description of drawings]

FIG. 1 is a system explanatory view showing an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of FIG.

FIG. 3 is a bottom view of the example of FIG.

FIG. 4 is an enlarged vertical cross-sectional view of the essential parts of another embodiment of the present invention.

FIG. 5 is an enlarged vertical cross-sectional view of the essential parts of yet another embodiment of the present invention.

6A and 6B are explanatory views of the action of illumination light, in which FIG. 6A shows an example of the present invention and FIG. 6B shows a conventional example.

FIG. 7 is an enlarged vertical sectional view of a main part of a conventional example.

[Explanation of symbols]

A Packaged product 1 Light source 2 Light-shielding case 3 Illumination mechanism 4 Camera 4 ₁ Lens 5 Image processing system 6 Diffusion plate 7 Half mirror 8 Mounting frame 9 Transport line 10 Through hole 11 Light-shielding wall

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kazuhiko Nakamura 1-3-7 Honjo, Sumida-ku, Tokyo Lion Engineering Co., Ltd.

Claims (3)

[Claims] 1. A light source such as a strobe, an illumination mechanism including a light-shielding case, and a camera connected to an image processing system. The camera emits illumination light from the light source of the illumination mechanism to display an image of a packaged product. In a package inspection apparatus for image processing, a cylindrical light-shielding case is provided concentrically directly below a camera arranged on the package, and a dome that produces reflected light that refracts the top surface of the light-shielding case downward. A light source provided on the inner periphery of the light-shielding case, while being formed on the reflective surface of the shape of
A device for inspecting packaged products such as tablets, which is provided with a diffusion plate having a through hole in the center below the light source. 2. The package inspection device according to claim 1, wherein the light-shielding case is provided with a 50% translucent half mirror at a portion facing the lens of the camera at the center of the top surface. 3. The packaging according to claim 1, wherein the light-shielding case is a cylindrical case having a spherical curved surface, a polygonal pyramid surface, or a dome-shaped reflecting surface having a large number of inwardly projecting hemispherical surfaces arranged thereon. Product inspection device.