JPH0618958U - Foreign substance inspection device for PTP - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention can be installed in an existing blister pack device, and immediately before the packaging material such as PVC sheet is heat-sealed with the aluminum sheet, the entire surface of the sheet can be accurately and at high speed. Inspect for foreign matter such as hair. [Structure] While illuminating one surface of a PTP sheet 6 by an illuminating device 2, the PTP sheet 6 is made visible by a television camera 3.
After the PTP sheet 6 is photographed from the other surface of the sheet 6, the image processor 4 processes the image photographed by the television camera 3 to detect a foreign substance on the PTP sheet 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foreign substance inspection device for PTP which inspects whether or not a foreign substance such as hair is placed on a PTP sheet.

[0002]

[Prior art]

 When making a tablet capsule PTP sheet, an inspector visually inspects whether foreign matter such as hair is placed on the PTP sheet to prevent foreign matter from being placed on the PTP sheet.

[0003]

[Problems to be solved by the device]

 However, in the above-described conventional foreign matter inspection method, since it is inspected by a visual inspection by an inspector whether or not the foreign matter is present on the PTP sheet, it is difficult to improve the accuracy of the inspection and it is difficult for the expert There was a problem that it was necessary to secure the inspector who had done so.

Further, since such a visual inspection is performed after cutting the PTP sheet, there is a problem that it is difficult to distinguish between the mesh of the aluminum sheet and a foreign substance such as hair.

In addition, before the PTP sheet process, it is almost impossible to inspect hair or the like (foreign matter) on a packaging material such as a PVC sheet, and the hair or the like (foreign matter) gets onto the sheet in the production process. There were things.

In view of the above circumstances, the present invention can be installed in an existing blister pack device, and immediately before the packaging material such as a PVC sheet is heat-sealed with the aluminum sheet, the entire surface of the sheet can be quickly and accurately measured. It is an object of the present invention to provide a foreign substance inspection device for PTP that can be inspected for the presence of foreign substances such as hair.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, a foreign substance inspection device for PTP according to the present invention comprises an illuminating device for illuminating a PTP sheet to be inspected from one surface, and the other surface of the PTP sheet illuminated by this illuminating device. And an image processing device that processes the image captured by the image capturing device and detects a foreign substance on the PTP sheet when the image is captured by the image capturing device. It

[0008]

[Action]

 In the above configuration, while the illumination device illuminates one surface of the PTP sheet, the imaging device captures the PTP sheet from the other surface of the PTP sheet, and then the image processing device captures the image on the imaging device. When the processed image is processed and there is a foreign substance on the PTP sheet, this is detected.

[0009]

【Example】

 FIG. 1 is a front view showing an embodiment of the PTP foreign matter inspection apparatus according to the present invention, and FIG. 2 is a side view of the PTP foreign matter inspection apparatus.

The foreign substance inspection device for PTP shown in these figures is provided with an illuminating device 2 provided in a blister pack device 1, a television camera 3 and an image processing device 4, and is in the process of being conveyed. The PTP sheet 6 is photographed from above by the television camera 3 while illuminating 6 from below by the illuminating device 2, and the image signal obtained by this photographing operation is processed by the image processing device 4 to obtain the PTP sheet. 6 Inspect for foreign matter such as hair on the top.

The illuminating device 2 has a semi-transmissive diffusion plate 8 fitted in a part of a conveyance table 7 that conveys the PTP sheet 6, a strobe light source 9 disposed below the semi-transmission diffusion plate 8, and a strobe light source. 9 is provided with a light-shielding hood 10 that shields the space between the carrier 9 and the carrier 7 so that ambient light does not enter the lower side of the semi-transmissive diffusion plate 8. While not entering, the strobe light source 9 is caused to emit light at a predetermined timing to supply light to the semi-transmissive diffusion plate 8 and illuminate the PTP sheet 6 during transportation from below.

In this case, the semi-transmissive diffusion plate 8 includes a half mirror 11 formed in a plate shape as shown in FIG. 3 and two opal-colored polycarbonate plates 12 provided so as to sandwich the half mirror 11. The light from the strobe light source 9 is diffused into uniform light, and the PTP sheet 6 is illuminated from below.

The television camera 3 is arranged above the carrier table 7 that conveys the PTP sheet 6, and the PTP sheet 6 is photographed each time the PTP sheet 6 is illuminated by the lighting device 2. Then, the image signal obtained by this photographing operation is supplied to the image processing device 4.

The image processing device 4 takes in an image signal output from the television camera 3 and divides the image signal into preset areas, for example, the PTP sheet 6 into “10” as shown in FIG. After performing shading correction for each obtained area, each pixel in the image signal is differentiated in the left-right (or up-down) direction to emphasize the contour of the image, and the differential image obtained by this differentiation processing. Is binarized with a preset threshold value to generate a binarized image, and it is determined based on the binarized image whether foreign matter such as hair is placed on the PTP sheet 6.

As a result, there is hair having a size of 0.75 mm × 6 mm in the center of the PTP sheet 6, and when an image signal showing the image shown in FIG. 5 (a) is output from the television camera, Just by looking at this image, it is not known that there is hair in the center, but after differentiating this to a differential image as shown in FIG. 5 (b), the differential image as shown in FIG. As is apparent from the binarized image obtained by binarizing, the hair 15 at the center can be found.

Similarly, when a foreign substance having a size of 0.5 mm square is present in the center of the PTP sheet 6 and the image signal showing the image shown in FIG. Although it is not known that there is a foreign substance in the center only by looking at the image, it is a binary value obtained by differentiating this and making it a differential image, and then binarizing the differential image as shown in FIG. 6 (b). As is apparent from the digitized image, the foreign matter 16 in the center can be found.

As described above, in this embodiment, the PTP sheet 6 which is being conveyed is illuminated by the illumination device 2 from below, and the PTP sheet 6 is photographed from above by the television camera 3 and obtained by this photographing operation. Since the image signal thus processed is processed by the image processing device 4 to inspect whether there is a foreign substance such as hair on the PTP sheet 6, it can be installed in the existing blister pack device 1. As a result, a new installation place is not required, and immediately before the packaging material such as PVC sheet is heat-sealed with the aluminum sheet, the entire surface of the PTP sheet 6 is quickly and accurately inspected, and the hair is It is possible to inspect for the presence of foreign matter such as.

Further, in the above-described embodiment, the image of the PTP sheet 6 is divided into 10, but it may be divided into 4 as shown in FIG. 7 or 30 as shown in FIG. However, the same effect as that of the above-described embodiment can be obtained.

[0019]

[Effect of device]

 As described above, according to the present invention, it can be installed in an existing blister pack device, and immediately before the packaging material such as PVC sheet is heat-sealed with the aluminum sheet, the entire surface of the sheet can be swiftly and accurately measured. Can be inspected for foreign substances such as hair.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a foreign substance inspection device for PTP according to the present invention.

FIG. 2 is a side view of the foreign substance inspection device for PTP shown in FIG.

FIG. 3 is a cross-sectional view showing a detailed configuration example of the semi-transmissive diffusion plate shown in FIG.

FIG. 4 is a schematic diagram showing an operation example of the PTP foreign matter inspection device shown in FIG. 1.

5 is a diagram showing an actual image processing example of the foreign substance inspection device for PTP shown in FIG.

FIG. 6 is a diagram showing an actual image processing example of the foreign substance inspection device for PTP shown in FIG. 1.

FIG. 7 is a schematic view showing an operation example of another embodiment of the PTP foreign matter inspection apparatus according to the present invention.

FIG. 8 is a schematic view showing an operation example of another embodiment of the foreign substance inspection device for PTP according to the present invention.

[Explanation of symbols]

 1 Blister pack device 2 Illumination device 3 TV camera (photographing device) 4 Image processing device 6 PTP sheet 7 Transport table 8 Semi-transmissive diffusion plate 9 Strobe light source 10 Light-shielding hood

Claims (1)

[Scope of utility model registration request] 1. An illuminating device that illuminates a PTP sheet to be inspected from one surface, an imaging device that images the PTP sheet from the other surface of the PTP sheet that is illuminated by the illuminating device, and the imaging device. The image captured by the device is processed to generate the P
A foreign matter inspection device for PTP, comprising: an image processing device for detecting foreign matter on the TP sheet;