JP4509419B2 - Coaxial epi-illumination camera photography device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coaxial epi-illumination type camera photographing apparatus for photographing an inspection object such as a blister pack containing a tablet with coaxial epi-illumination.
[0002]
[Prior art]
In general, tablets are often contained in blister packs. This blister pack is produced by placing tablets in a transparent PTP sheet having pockets formed at equal intervals, covering with a flat aluminum foil sheet, and thermally welding.
[0003]
When this blister pack is produced, tablets are broken, powder is adhered, and foreign substances such as dust and hair are adhered and mixed.
[0004]
Therefore, in general, put a tablet in a pocket, shoot light with a camera in a state before it is covered with an aluminum foil sheet, perform predetermined processing on this image data, and inspect for foreign objects Was.
[0005]
However, foreign matters may adhere and mix at the stage of covering with an aluminum foil sheet. For that purpose, inspection in the state of being contained in a blister pack is necessary, and eventually, it was dealt with by visual inspection by humans.
[0006]
[Problems to be solved by the invention]
In the visual inspection by humans, there is a problem that variations in inspection standards and mistakes occur.
[0007]
Therefore, it is conceivable to perform an automatic inspection by image processing. However, in the conventional imaging apparatus, the inspection is performed in the state of the blister pack because the light of the aluminum foil sheet is taken out and the foreign object is removed. It was extremely difficult.
[0008]
Therefore, for example, an attempt was made with coaxial epi-illumination as shown in FIG. 6, but it is possible to shoot only the image of the blister pack, but the CCD camera shoots even the glare of the blister pack. There was a problem that correct inspection could not be performed.
[0009]
Further, the coaxial incident light shown in FIG. 6 has a problem that the inner side of the light shielding cover box is reflected due to its shape.
[0010]
The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a coaxial epi-illumination type camera photographing apparatus that does not cause the camera side to photograph the glare light of a blister pack.
[0011]
[Means for Solving the Problems]
The present invention includes a CCD camera, and a rectangular parallelepiped having a LED illuminator placed in the light shielding box, the CCD camera and the rectangular parallelepiped are those which are vertically supported by struts, a PTP sheet or blister packs rectangular is irradiated with light from the LED illuminators against the inspection object, the coaxial incident illumination type camera imaging device for projecting reflected light to the CCD camera from the object to be inspected,
The rectangular parallelepiped and the CCD camera are supported in the vertical direction by being fixed by the support in the light shielding box with a space therebetween,
The rectangular parallelepiped is
Said first surface to be inspected object side is on the entire surface opening rectangular to match the shape of該被test subject査物, second surface side opposite to the opening is in the first viewing window of said rectangular and A rectangular second viewing window is provided at a predetermined location on either side,
And one side to be the LED illuminator side, which is located between the other opposite sides with respect to the light from the second viewing window with bent 90 degrees to the opening side, the object to be inspected A half mirror that projects reflected light from an object onto the first viewing window;
Said LED illuminator provided in the second viewing window side,
A first polarizing filter that is located between the LED illuminator and the second viewing window, has an incident surface facing the LED illuminator, and causes light from the LED illuminator to travel straight to the half mirror; ,
Have
The CCD camera attached to the first viewing window side of the second surface of the rectangular parallelepiped,
A second polarizing filter arranged incident surface provided to face the front Stories second surface,
A holder that changes the polarization plane of the second polarizing filter by being rotated,
The inner peripheral surface of each side of the rectangular body,
With the half mirror as a boundary, the gist is that the inner peripheral surface of the object to be inspected from the boundary is white and the second surface is black.
[0014]
The boundary surface is
The four surrounding surfaces on the inspected object side are white, and the four surrounding surfaces and the second surface on the second surface side are based on the rectangular-shaped support portion indicated by the side surfaces of the half mirror. The gist is that the inside is black.
Furthermore, the inspection object is a PTP sheet or blister pack whose longitudinal direction is perpendicular to the transport direction,
The opening is
It is in a longitudinal shape to cover only the PTP sheet or blister pack
Is the gist.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic configuration diagram of a coaxial incident camera apparatus according to the present embodiment. The coaxial incident camera device 10 is used in a PTP packaging machine 20 including a compression roller 11, a transport table 12, a roller 14 for an aluminum sheet 13, a heat shaping roller 15, a die-cutting roller 16, a tablet permeator 17, and the like.
[0016]
The PTP wrapping machine 20 is connected to an image processing device 21. The image processing device 21 controls the CCD camera 18 of the coaxial incident camera device 10 and performs predetermined processing on the captured image of the coaxial incident camera device 10. And discriminate between good and defective products.
[0017]
The PTP packaging machine 20 described above forms a PTP sheet 26 having pockets of equal intervals by compressing the original PTP sheet 25 with the compression roller 11, while guiding the PTP sheet 26 to the transport table 12 and transporting it, The tablet 27 is put in the pocket of the PTP sheet 26. The blister pack 28 is photographed by the coaxial incident camera device 10.
[0018]
And the aluminum sheet 13 is thermocompression-bonded with respect to the PTP sheet 26 in which the tablet 27 was put with the heat shaping roller 15, and it conveys to a post process. In a subsequent process, the die-cutting roller 16 forms a blister pack 28 that has been die-cut.
[0019]
The configuration of the coaxial incident camera device 10 will be described in detail with reference to FIG. As shown in FIG. 1, the coaxial incident camera device 10 of the present embodiment has a shape that can receive reflected light from the blister pack 28.
[0020]
That is, the shape of the opening 30 that becomes the blister pack 28 is a rectangular shape that can receive only the reflected light from the blister pack 28.
[0021]
A rectangular cube box 31 (hereinafter referred to as a rectangular cube box 31) having the rectangular opening 30 is formed. Further, the side surfaces 32 of the straight cubic box 31 (sides PTP sheet is perpendicular to the direction to be conveyed) is provided with a rectangular shape viewing window 33 and the polarizing filter 34 and the LED illuminators 35.
[0022]
The viewing window 33 and the polarizing filter 34 is a rectangular viewing window 33 in accordance with the blister pack 28, so that the light emitted from the LED illuminator 35 is irradiated to the blister pack 28 through the polarizing filter 34 I have to.
[0023]
A half mirror 36 is provided inside the rectangular cube box 31. The half mirror 36 has a rectangular shape, and is attached to the inside at an angle so as to bend the irradiation light from the LED illuminator 35 by 90 degrees and irradiate the blister pack 28.
[0024]
Furthermore, sight glass 38 of the same shape as the viewing window 33 on the upper surface of the straight-cube 31 is provided a camera 41 having a polarizing filter 37 in the lens unit 40 on the viewing window 38 is provided.
[0025]
Also, the color inside the cubic box 31 will be described. The inside of the rectangular cubic box 31 is black around the upper half of the half mirror 36 and is white around the lower half of the half mirror 36.
[0026]
Polarizing filter 34 of the above aspects, X-axis as shown in FIG. 1, for example with respect to the upper surface of the opening 38, when giving the Y-axis, the polarization plane with respect to the Y-axis is the characteristic that is horizontal with polarizing filter 37 of the top surface, the polarization plane with respect to the Y-axis is set to be horizontal.
[0027]
Further, the polarizing filter 37 on the upper surface is provided on the CCD camera 41 side as shown in FIG. As shown in FIG. 2, the CCD camera 41 is protected by a glass 39 by attaching a polarizing filter 37 to the lens unit 40. And the polarization plane can be changed by rotating the holder.
[0028]
That, CCD camera 41 of this embodiment, light emitted from the LED illuminator 35 is polarized by the polarizing filter 34, the irradiation bent 90 degrees by the half mirror 36 from the lower opening 30 to the blister pack 28 Is done.
[0029]
This irradiation light is reflected by the blister pack 28, and this reflected light reaches the camera side via the half mirror 36.
[0030]
At this time, since the periphery of the lower part of the half mirror 36 is white, the irradiation light is strongly reflected by white as shown in FIG. In particular, the irradiation light itself with respect to the periphery of the blister pack 28 also becomes strong. For this reason, the periphery becomes bright like the center part of the blister pack 28.
[0031]
The reflected light from the blister pack 28 itself is reflected upward through the half mirror 36 while being irregularly reflected by white. However, since the upper periphery of the half mirror 36 is black, the irregular reflection component is absorbed. That is, the glittering light of the blister pack 28 is also absorbed.
[0032]
For this reason, there exists an effect demonstrated below. For example, the image processing device 21 binarizes image data obtained by photographing the blister pack 28, and when the binarized data exceeds a reference value (powder, hair), it is excluded as a defective sheet. It was.
[0033]
However, the aluminum sheet may have wrinkles. A wrinkle is not a foreign substance such as hair or powder. However, the above-described image processing apparatus simply excludes a defective sheet when the binarized data of the image data exceeds a reference value.
[0034]
However, the coaxial epi-illumination camera device 10 can remove glare from the blister pack 28, and thus can distinguish wrinkles. Further, when used in the PTP transport machine 20, since the LED illumination is used, the illumination under the transport table is unnecessary.
[0035]
Also, the coaxial epi-illumination camera device 10 of the present embodiment is used by being housed in a light-shielding BOX 45 whose interior is black as shown in FIG. The light shielding BOX 45 is provided with a column 46 that supports the coaxial epi-illumination camera device 10 vertically.
[0036]
Moreover, as shown in FIG. 5, the apparatus of this Embodiment may provide this apparatus also in a PTP packaging machine, and may test | inspect the foreign material on the tablet surface. Further, in the PTP packaging machine, the tablets may be inspected in both directions from the upper side and the lower side through the PTP sheet with the tablet in the pocket of the PTP sheet.
[0037]
Further, the surface of the PTP sheet after sealing with the heat shaping roller 15 but before punching may be inspected.
[0038]
Further, in the present embodiment, the tablet has been described as an object, but any other items such as confectionery and the like that are packaged in a blister pack can be applied.
[0039]
【The invention's effect】
As described above, according to the present invention, it is possible to cause the CCD camera to capture an image in which shining (glaring) from an inspection object such as a PTP sheet or a blister pack is suppressed .
[0045]
Also, since P TP sheet, thereby suppressing the gloss of the blister pack, it is possible to wrinkles of the sheet also regarded as an image.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a coaxial incident camera apparatus according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram illustrating a CCD camera.
FIG. 3 is an explanatory diagram for explaining the relationship between a rectangular cube box and a blister pack.
FIG. 4 is an explanatory diagram for explaining a relationship between a coaxial incident camera device and a light shielding BOX.
FIG. 5 is an explanatory diagram for explaining another example of use of the coaxial incident camera device according to the present embodiment;
FIG. 6 is a perspective view of a conventional coaxial epi-illumination.
[Explanation of symbols]
10 coaxial incident camera device 11 compression rollers 12 transport boards 20 PTP packaging machine 26 PTP sheet 28 blister packs 31 straight cubic box 34 polarizing filters 35 LED illuminator 36 a half mirror

Claims (1)

A CCD camera, and a rectangular parallelepiped having a LED illuminator placed in the light shielding box, the are those in which the CCD camera and the rectangular parallelepiped is vertically supported by pillars, rectangular object to be inspected is a PTP sheet or blister packs In a coaxial epi-illumination type camera photographing apparatus that irradiates light from the LED illuminator on an object and projects reflected light from the inspection object onto the CCD camera.
The rectangular parallelepiped and the CCD camera are supported in the vertical direction by being fixed by the support in the light shielding box with a space therebetween,
The rectangular parallelepiped is
Said first surface to be inspected object side is on the entire surface opening rectangular to match the shape of該被test subject査物, second surface side opposite to the opening is in the first viewing window of said rectangular and A rectangular second viewing window is provided at a predetermined location on either side,
And one side to be the LED illuminator side, which is located between the other opposite sides with respect to the light from the second viewing window with bent 90 degrees to the opening side, the object to be inspected A half mirror that projects reflected light from an object onto the first viewing window;
Said LED illuminator provided in the second viewing window side,
A first polarizing filter located between the LED illuminator and the second viewing window, having an incident surface facing the LED illuminator, and directing light from the LED illuminator straight to the half mirror; ,
Have
The CCD camera attached to the first viewing window side of the second surface of the rectangular parallelepiped,
A second polarizing filter arranged incident surface provided to face the front Stories second surface,
A holder that changes the polarization plane of the second polarizing filter by being rotated,
The inner peripheral surface of each side of the rectangular body,
A coaxial epi-illumination type camera photographing apparatus, characterized in that, with the half mirror as a boundary, the inner peripheral surface of the object to be inspected is coated with white and the second surface side is coated with black.

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