JP2000065546A - Film packaging inspection method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To judge whether packaging is appropriate or not by applying light to a part to be inspected at the side part of a product being carried for picking up its image from an upper portion and detecting the amount of projection from an article at the part to be inspected. SOLUTION: A product 3 is carried to a position P1 and air is sprayed to side surfaces 3b and 3c of the product 3 from an oblique, upper part by an air injection means 30. Upper and lower films touch side surface of each case 2 or are separated by air force, the failure in packaging becomes prominent, light is applied to the product 3 from a side by a light source 6, and an image is picked up by a camera 7. Packaging failure is allowed to become prominent at the position P2 by an air injection means 31, light is applied to the side surfaces 3b and 3c from the oblique direction of the side surface of the case 2, and an image is picked up by a camera 9. A front edge part 3a of the product 3 touches an end part 10b of a guide body 10 at the position P3 for rotating by 90 degrees, reaches a position P4 along a measurement edge part 10a, packaging failure is allowed to become prominent by an air injection means 32, and an image is picked up from a lower portion by a camera 12. A packaging failure discrimination means 13 detects packaging failure according to the amount of projection in the width direction of the product 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact method of image processing for a product formed by packing an article such as a compact disk in a case with a transparent film, by a non-contact method by image processing. The present invention relates to a technology for detecting a defect.

[0002]

2. Description of the Related Art In a film packaging inspection of a product formed by packaging an article with a transparent film, it is difficult to detect defective packaging even by visual inspection of a person because of the characteristic that the packaging is a transparent film. There is no choice but to judge from the situation or its change, and there has been a demand for an improvement in stable detection and prevention of oversight. Furthermore, under the above circumstances, the burden of the inspector is very large because measures to prevent oversight are taken by the method that uses the contact inspection by the inspector's tentacles in addition to the visual inspection. Also, automation of inspection was desired.

A method of inspecting a packaging defect of a transparent film in a non-contact manner based on an image picked up by a camera by applying the current image processing technology is at a partially feasible level.

[0004]

However, a method and an apparatus for reliably and stably detecting a packaging defect on all three sides of a three-side seal so that it can be used in an actual production line have not been developed.

As shown in the plan view of FIG. 9A, for example, a three-way seal refers to an article such as a compact disc CD in a case, and the front surface 2a of the case 2 has a front surface 1a.
9 (b), the transparent film 1 is folded back on the front surface 2a of the case 2, and the front and back surfaces of the case 2 are wrapped. In this manner, the case 2 is sandwiched, and the portions of the transparent film 1 corresponding to the side surfaces 2b and 2c and the rear surface 2d of the case 2 are thermally welded. Broadly speaking, there are three types of defective packaging of the three-side seal as follows.

[0006] The first type of packaging failure is shown in FIG.
(A) As shown in FIG.
D on the side 3b of the product 3 wrapped with the transparent film 1, the outer surface 1c of the upper film 1a and the lower film 1
b should be bonded to the inner surface 1d by heat welding, but the films 1a and 1b on both sides are not bonded because the heat welding is not performed, and the films 1a and 1b on both sides are bonded together.
The packaging defect is such that 1b is separated from the side surface 2b of the case 2.

The second type of packaging failure is shown in FIG.
As shown in (b), in the rear part 3d of the product 3, the inner surface 1d of the lower film 1b is connected to the outer surface 1c of the upper film 1a.
Is not adhered, and only the lower film 1b is opened. Further, as shown by a broken line in FIG. 10B, when the product 3 is bonded by heat welding, the lower film 1b may be folded under the case 2. In this case, this cannot be imaged from the camera above. On the other hand, in the rear part 3d of the product 3, the upper and lower films 1a and 1b may have the inner and outer positional relations reversed, and the inner surface of the upper film 1a may be bonded to the outer surface of the lower film 1a. Incorrect packaging may occur. Also in this case, when the product 3 is bonded by heat welding, the upper film 1a may be folded over the case 2. In this case, it cannot be imaged from the lower camera.

The third type of packaging failure is shown in FIG.
As shown in (c), since the case 2 was packaged with the arrangement of the case 2 shifted from the film 1 in the width direction, the end of the upper film 1a and the lower film were formed on one side 3b of the product 3. This is a packaging defect in which at least a part of the side surface 2b of the case 2 is exposed without being covered with the transparent film 1 because it does not overlap because the end of the case 1b does not reach, and this is called a cutting defect. I have. At first glance, the appearance of the cut defect is not different from that of a non-defective product. Therefore, it is particularly difficult to detect the cut defect by image processing, and the operator must rely on the tentacles of the inspector.

Accordingly, the present invention is directed to a film packaging method for a product formed by packaging an article such as a compact disk in a case with a transparent film, which can detect various defects generated in the film packaging process in a non-contact manner by image processing. An object of the present invention is to provide an inspection method and an apparatus therefor.

[0010]

According to the present invention, there is provided a method and apparatus for inspecting a film package of a product, wherein the article is wrapped with a transparent film. While illuminating the part to be inspected on the side of the product being transported, the product is imaged from above, and the amount of protrusion of the part to be inspected from the article is detected from the captured image to determine whether the packaging is defective. It is determined whether or not.

According to this configuration, the inspection by the inspector by visual inspection or by tentacles becomes unnecessary, so that the film packaging inspection can be automatically performed. Further, although the inspection is performed by illuminating the inspected portion, it is preferable to illuminate only the inspected portion. By illuminating only the part to be inspected, for example, in the case of an article such as a compact disc in a case, in which various patterns and colors are applied to the front and rear surfaces, the front and rear surfaces of the product are not illuminated, thereby Accurate inspection can be performed without being affected by each pattern and color. Further, since the amount of protrusion of the inspected portion from the article is detected from the captured image, the first packaging defect (FIG. 10A)
Inspection of defective packaging shown in (1)).

According to another aspect of the present invention, there is provided a method and apparatus for inspecting a film package of a product in which an article is wrapped with a transparent film, wherein the article is located inside a side of the product. A number of parallel grooves are formed on the corresponding surface, and the inspected portion is imaged obliquely with respect to the corresponding surface, and from the captured image, whether the packaging of the inspected portion is defective. Is determined.

According to this configuration, when the film illuminates the inspected portion of the package that completely covers the article, the illumination light is specularly reflected on the film surface. On the other hand, in the case where there is a third packaging defect, which is a cutting defect (the packaging defect shown in FIG. 10C), when the film illuminates the inspected portion of the defective packaging in which a part of the article is not covered, the illumination is performed. Light is scattered by a number of grooves. Therefore, since the amount of light incident on the imaging means installed at a predetermined position changes depending on whether the film completely covers the article, it is determined whether there is a disconnection defect from the brightness of the captured image. Can be determined. As a result, it is possible to perform image processing of a cutting defect that has been particularly difficult in the past.

According to another aspect of the present invention, there is provided a method and apparatus for inspecting film packaging of a product in which an article is wrapped with a transparent film, wherein the product is transported by a transport conveyor. Part of the product is projected laterally from the conveyor, and a part of the package of the protruded product is imaged from above or below as a part to be inspected, and the packaging of the part to be inspected is determined to be defective from the captured image. It is determined whether or not there is.

According to this configuration, since a part of the product protruding laterally from the conveyor is imaged from above or below, only the upper film or the lower film which has conventionally been difficult to inspect is opened. Second packaging failure (the packaging failure shown in FIG. 10 (b)), or a second packaging failure where the upper or lower film is folded over or below the article (shown in FIG. 10 (b)). ) Can be accurately performed.

In a preferred embodiment of the film packaging apparatus according to the present invention, the guide body which guides the product during the transportation and projects a part of the product from the transportation conveyor to the side is in contact with a part of the front end of the product. And a side edge that guides the product in the conveying direction of the conveyor by rotating the product in contact with the end by 90 ° with the conveying force of the conveyor. According to this configuration, since the rotation of the direction of the product is performed by the guide body having the end portion and the side edge portion, the first packaging defect (the packaging defect shown in FIG. 10B) without providing complicated facilities. Inspection can be performed accurately.

In a preferred embodiment of the method and apparatus for inspecting a film package according to the present invention, air is blown so that defective packaging of the inspected portion becomes remarkable, and then the inspected portion is imaged. According to this configuration, air is blown so that the lower film and the upper film are separated from each other by heat welding so that the two films are separated from each other. Defects become remarkable. In this way, if the packaging does not seem to be defective, the conventional inspection method has been limited to tentacles. Since it is possible to prevent overlooking of a packaging defect when judging whether or not the packaging is defective from the above, the detection capability is improved, and more accurate inspection can be performed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a film packaging inspection apparatus (hereinafter, simply referred to as “apparatus”) according to a first embodiment of the present invention. The apparatus inspects the packaging of a product 3 formed by packaging a case 2 of a compact disc CD in a case with a transparent film (hereinafter, sometimes simply referred to as “film”) 1. The apparatus first includes a belt conveyor 4 that is a conveyor, and the belt 4a moves in the direction A so that the product 3 on the belt 4a is conveyed at a constant speed.

The apparatus further includes a position P1 on the belt 4a.
By illuminating the product 3 moving from both sides thereof, the first light sources 6 and 6 as two illumination means for illuminating both sides 3b and 3c of the product 3, and the illuminated first object A first camera 7 is provided as imaging means for imaging the inspection units 3b and 3c from above the product 3 moving at the position P1.

The case 2 has a corresponding surface located inside the side portions 3b and 3c of the product 3 which is the first inspected portion of the package, that is, the side surfaces 2b and 2c of the case 2 (FIG. 9).
In (a)), a number of parallel grooves are formed. The device moves the product 3 at the position P2 on the belt conveyor 4.
Are illuminated on the corresponding surfaces 2b and 2c from an oblique direction on the same horizontal plane as the product 3 so that the two second light sources 8 and 8 that illuminate both sides 3b and 3c of the product 3 ,
There are provided two second cameras 9, 9 for imaging the first inspected parts 3 b, 3 c from substantially the same direction as the second light sources 8, 8.

When the product 3 is transported to the position P3, the apparatus guides the product 3 so that the direction of the product 3 is 90 degrees.
And a guide body 10 that is rotated to partially project from the belt conveyor 4 to the side. The guide body 10 has a rectangular parallelepiped shape and is fixed and disposed above the belt conveyor 4, and its bottom surface does not contact the belt 4a,
b and a longitudinal side edge 10 a for guiding the product 3. When the product 3 is conveyed to the position P4, the device 3 detects the rear portion 3 of the protruding product 3, which is the second inspection target.
A third light source 11 that illuminates d, and a third camera 12 that is arranged to capture an image of the illuminated second inspection target from below.

The apparatus is further arranged above the first light sources 6 and 6 so that when the first camera 7 takes an image of the product 3, both sides of the product 3 that is the first inspected portion of the package. 3b, 3c
Of both sides of the product 3 so that the defective packaging of the
Two first air injection means 30, 30 for blowing air obliquely upward from around b, 3c are provided. Similarly, when the second cameras 9, 9 image the product 3, the defects of the packaging on both sides 3 b, 3 c of the product 3, which is the first inspected portion of the packaging, become noticeable. Two second air injection means 31, 31 for blowing air obliquely from above in the vicinity of both sides 3b, 3c are provided. Further, when the third camera 12 captures an image of the product 3, the product 3 may be rejected so that the defective packaging of the rear portion 3 d of the product 3, which is the second inspected portion of the packaging, becomes prominent.
The third that blows air obliquely upward from around the rear part 3d
Is provided.

The apparatus further determines whether the packaging of each inspected portion is defective based on the images captured by the first camera 7, the second cameras 9, 9, and the third camera 12. Is provided.

Next, the operation of this device will be described.
First, when the product 3 is transported to the position P1, that is, the position immediately below the first camera 7, the side surfaces 3b and 3c of the product 3
Then, the first air injection means 30, 30 blows air obliquely from above. FIG. 2A shows the first packaging defect (FIG. 10).
As shown in (a), when the air injection means 5 blows air in the direction B, that is, in the direction toward the side 3b of the product 3, in this case, the side of the case 2 is applied to the upper film 1a. 2b, the air force acts in the direction C so as to come into contact with the lower film 1b, and the air force acts in the direction D so as to separate from the side surface 2b of the case 2 on the lower film 1b.
As shown in (b), the upper film 1a is in contact with the side surface 2b of the case 2 and the lower film 1b is in contact with the side surface 2b of the case 2.
Move away from b. Thus, in the state of the product 3 in FIG. 2 (a), it appears that there is no defective packaging, but by blowing air, the defective packaging becomes more prominent as shown in FIG. 2 (b). .

In this embodiment, since the inner surface 1d of the lower film 1b is bonded to the outer surface 1c of the upper film 1a, air is blown obliquely from above. In the case where the inner surface of 1a is bonded, the defective packaging becomes more noticeable by blowing air obliquely from below.

Next, since the product 3 is located just below the first camera 7 in the state where the air is blown in this way, as shown in FIG. The product 3 illuminated from above is picked up by the first camera 7, and the still image is processed by the packaging defect determination means 13. As shown in FIG. 4, the image processing method is such that, in an image 20 obtained by capturing the product 3 from above, the side portions 3 b and 3 c
Is determined, and the length of the product 3 in the width direction W is measured at regular intervals. Each of the measured lengths is compared with the length of the product 3 stored in the packaging failure determination means 13, that is, the dimension in the width direction of the product 3 when there is no packaging failure. , The amount of protrusion from the case 2 is detected, and it is determined that this is the first packaging failure (the packaging failure shown in FIG. 10A), and the packaging failure can be detected. This image processing method is an example, and any processing method may be used as long as it can detect that the film 1 is separated from the side surface 2b of the case 2.

As described above, the first light source 6 shown in FIG.
6. The first camera 7 and the packaging failure determination means 13 can automatically detect the first packaging failure. Although various patterns and colors according to the product are applied to the front or back surface of the case 2, the first light sources 6 and 6 do not illuminate the upper and lower surfaces of the product 3, so that each product is packaged. The luminance of the image processed by the defect discriminating unit 13 does not greatly change, and an accurate inspection can be performed without being affected by the pattern and color of each product. further,
Since the amount of protrusion of the inspected portion from the article is detected from the captured image, the first packaging defect (the packaging defect shown in FIG. 10A) can be accurately inspected.

Next, the position P2, that is, the side surface 2 of the case 2
When the product 3 moves to a position where the second cameras 9 and 9 image both sides 3b and 3c of the product 3 which is the first inspection target from a diagonal direction with respect to b and 2c, the second light sources 8 and 8 are turned on. The second cameras 9, 9 capture images of the side portions 3 b, 3 c of the illuminated product 3, and the still images are processed by the packaging defect determination unit 13. Here, in the case of the product 3 in which the case-containing compact disc CD is wrapped with the transparent film 1, an angle of 10 ° to 35 °, more preferably 15 ° to 25 ° is made with respect to the side surfaces 2b and 2c of the case 2. An oblique direction is preferred. Also at this position P2, the second air injection means 31, 31
In the same method as the method at the position P1, the defective packaging becomes noticeable.

As shown in FIG. 5A, in the product 3, when the film 1 completely covers the side surface 2b of the case 2, most of the light 21 emitted from the second light source 8 The reflected light 22 is specularly reflected on the film surface 1 e and does not return to the second light source 8, so that it does not enter the second camera 9. On the other hand, as shown in FIG. 5B, there is a third packaging defect, a cutting defect (the packaging defect shown in FIG. 10C), and the film 1 does not cover the entire side surface 2 b of the case 2. In this case, the light 21 emitted from the second light source 8 directly enters the exposed part of the side surface 2 b of the case 2, is reflected by the groove surface 2 e formed on the side surface 2 b, and is transmitted to the second camera 9. The reflected light 23 is directed toward the direction away from the second camera 9 by being mainly reflected by the plane 2f between the grooves, and the light is scattered in various directions. Is done. Therefore, a part of the reflected light enters the second camera 9. The still image obtained by the second camera 9 capturing the first inspected portion is input to the packaging defect determination unit 13, and the packaging failure determination unit 13 determines the luminance of a predetermined portion in the image and the packaging failure determination unit 13. Is compared with the reference luminance stored in the case 2, if the luminance is high, it is determined that there is a cutting defect which is the third packaging defect because the light is scattered on the side surface 2b of the case 2. I do.

As described above, the cutting failure can be automatically detected, and the inspection which conventionally had to rely on the tentacles of the inspector can be performed by image processing.

Next, when the product 3 moves to the position P3 shown in FIG. 1, the front end 3a of the product 3 is moved to the end 1 of the guide body 10.
0b. Since the guide body 10 is provided so that only a part of the front end 3a of the product 3 contacts the end 10b of the guide body 10, when the product 3 contacts the end 10b of the guide body 10, this end The product in contact with 10b is rotated 90 ° by the conveying force of the belt conveyor 4, and the front end 3a of the product 3 is guided by the side edge 10a of the guide body 10 in the conveying direction A of the conveying conveyor and moves. The rear part 3d of the product 3 whose direction has been rotated by 90 ° projects from the belt 4a.

When the product 3 moves to the position P4, the third air jetting means 32 makes the packaging defect noticeable in the same manner as the method at the position P1. In addition, FIG.
As shown in (b), the rear part 3d of the product 3 is the third light source 1
1 illuminated from the side. The third camera 12
When the product 3 is conveyed right above, the part of the product 3 protruding from the belt conveyor 4 is imaged from below. The captured still image is processed by the packaging failure determination unit 13. As shown in FIG. 6A, when the second packaging failure (the packaging failure shown in FIG. 10B) occurs and the end 1 f of the film 1 protrudes from the case 2, In the captured still image, the protruding end 1f shines, and the luminance is high. Further, as shown in FIG. 6B, it is the second packaging failure and the end 1f of the film 1
Is folded under the case 2, the folded end 1f of the still image shines, and the brightness is high. Therefore, the packaging defect determining means 13 checks the luminance of the still image, and detects a second packaging defect when there is a portion larger than the reference luminance.

On the other hand, in the rear portion 3d of the product 3, when the upper and lower films 1a and 1b are opposite in inner and outer positional relationship and only the upper film 1a is open, the third camera 12 is The product 3 is arranged above and the rear part 3d of the product 3 is imaged from above. Also in this case, in the captured still image, the end 1f of the film 1 protruding beyond the case 2 or the end 1f folded into the upper side of the case 2 shines, and the luminance is high. Thus, the second packaging defect can be detected.
As described above, a part of the product protruding laterally from the belt conveyor 4 is imaged from below or above in accordance with the packaging method, so that the inspection of the second packaging defect, which was conventionally difficult to inspect, is accurately performed. be able to.

Thus, the first camera, the second camera,
Since the third camera and the third camera image the inspected portion of each package, the first to third packaging defects (FIGS. 10A to 10C) which are patterns of packaging defects in the packaging of the case 2
All the packaging defects shown in (1) can be automatically inspected by image processing. Therefore, since the tentacle inspection by the inspector becomes unnecessary, the burden on the inspector is reduced.

Next, a second embodiment of the present invention will be described. As shown in FIG. 7 which shows a part of the film packaging inspection apparatus of the present embodiment, this apparatus is not provided with a second light source.
Instead, the side parts 3b, 3c of the product 3 illuminated by the first light sources 6, 6 are imaged by the two second cameras 9, 9.
As shown by the broken line in FIG.
When the side surface 2b is completely covered, most of the dashed light 21 returns to the first light source 6 like the dashed light 22, and does not enter the second camera 9. On the other hand, if there is a cutting defect that is a third packaging defect (the packaging defect shown in FIG. 10C), the light 21 emitted from the first light source 6 is exposed to the exposed part of the side surface 2b of the case 2. Directly, and is reflected by the side surface 2 e to become reflected light 23 toward the second camera 9, or is reflected mainly by the plane 2 f between the grooves and returns to the second first light source 6. The reflected light 22 may be scattered in various directions. Therefore, when there is a third packaging failure, the luminance of the still image input to the packaging failure determination unit 13 increases as in the first embodiment. In this manner, the first camera 7 and the second cameras 9, 9 capture the images of the side portions 3 b, 3 c of the product 3 illuminated by the first light sources 6, 6, so that the first light source 6, 6, the apparatus can be made compact.

Next, a third embodiment of the present invention will be described. As shown in FIG. 8 which shows a part of the film packaging inspection apparatus of the present embodiment, in this apparatus, the second light sources 8 and 8 and the second camera are provided for the side surfaces 3b and 3c of the product 3 at the position P2. 9 and 9 are displaced to the front and rear opposite sides, and the opposing angles θ1 and θ2 are arranged to be substantially the same. In this arrangement, as shown in FIG. 5A, when the film 1 covers the side surfaces 2b and 2c of the case 2,
The light emitted from the second light source 8 is applied to the film surface 2.
The light is specularly reflected at c and enters the second cameras 9, 9. on the other hand,
As shown in FIG. 5B, when the film 1 does not cover all of the side surfaces 2 b and 2 c of the case 2 due to a cutting failure, the light emitted from the light sources 8 and 8 forms many grooves. The amount of light scattered on the exposed side surface 2b of the case 2 and incident on the second cameras 9, 9 decreases. The images obtained by the second cameras 9, 9 capturing the side portions 3b, 3c of the product 3 are as follows.
The packaging defect determining means 13 compares the luminance at a predetermined location in the image with the reference luminance. If the luminance is small, the light is scattered on the side surface 2b of the case 2 and the packaging is defective. Is determined to be.

[0037]

According to the present invention, the inspection by the inspector visually or by tentacles becomes unnecessary, so that the film packaging inspection can be performed automatically.

[Brief description of the drawings]

FIG. 1 is a plan view of a film packaging inspection device according to a first embodiment of the present invention.

FIGS. 2 (a) and (b) are first and second embodiments of the present invention, respectively.
It is a front sectional view showing some steps of a film packaging inspection method concerning an embodiment.

FIG. 3 is a front view showing a part of the film packaging inspection device according to the first embodiment of the present invention.

FIG. 4 is a view showing an image processed by a packaging failure determination unit in the film packaging inspection method according to the first embodiment of the present invention.

FIGS. 5 (a) and (b) are first and second embodiments of the present invention, respectively.
1A is a plan sectional view showing the principle of a film packaging inspection method according to an embodiment, where FIG.
Indicates the case where the packaging is defective.

FIG. 6 is a front view showing a part of the film packaging inspection device according to the first embodiment of the present invention.

FIG. 7 is a plan view of a film packaging inspection device according to a second embodiment of the present invention.

FIG. 8 is a plan view of a film packaging inspection device according to a third embodiment of the present invention.

9A is a plan view showing a compact disk packaging process, and FIG. 9B is a perspective view showing a compact disk packaging process.

10A is a front sectional view showing a first packaging defect, FIG. 10B is a front sectional view showing a second packaging defect, and FIG. 10C is a front view showing a third packaging defect. It is sectional drawing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transparent film, 2 ... Case, 3 ... Product, 3a ... Product front end, 3b, 3c ... 1st inspected part, 3d ... 2nd inspected part, 4 ... Conveyor, 6 ... First Lighting means, 7
... first imaging means, 8 ... second illumination means, 9 ... second imaging means, 10 ... guide body, 10a ... side edge of the guide body,
10b: end of guide body, 11: third lighting means, 12
... third imaging means, 13 ... packaging defect discriminating means, CD ... compact disc (article), 30 ... first air jetting means, 31 ... second air jetting means, 32 ... third air jetting means.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F065 AA61 BB22 CC02 DD00 FF04 HH12 HH13 JJ03 JJ05 JJ08 JJ09 MM22 PP15 QQ31 RR06 2G051 AA01 AA90 AB05 AB20 CA01 CA07 DA05 DA20 5B057 AA02 BA15 BA19 DA03 DC03

Claims (9)

[Claims] 1. A method for inspecting a film package of a product obtained by packaging an article with a transparent film, wherein the product is imaged from above while illuminating a part to be inspected on a side of the product being conveyed by a conveyor. A film packaging inspection method for detecting the amount of protrusion of the inspected portion from the article from the captured image to determine whether the packaging is defective. 2. A method for inspecting a film package of a product obtained by packaging an article with a transparent film, wherein the article has a number of parallel grooves formed on a corresponding surface located inside a side portion of the product. A film packaging inspection method for imaging the inspected portion from an oblique direction with respect to the corresponding surface, and determining whether or not the packaging of the inspected portion is defective based on the captured image. 3. A method for inspecting film packaging of a product obtained by packaging an article with a transparent film, wherein when the product is transported by a transport conveyor, a part of the product protrudes laterally from the transport conveyor. A film packaging inspection method in which a part of the package of the protruding product is imaged from above or below as a part to be inspected, and it is determined whether or not the packaging of the part to be inspected is defective from the captured image. 4. The film packaging inspection method according to claim 1, wherein an image of the inspected portion is taken while blowing air so that defective packaging of the inspected portion becomes remarkable. 5. A film packaging inspection apparatus for a product, wherein an article is wrapped with a transparent film, comprising: a transport conveyor for transporting the product; and a part to be inspected on a side portion of the product being transported by the transport conveyor. Illuminating means for illuminating; imaging means for imaging a product illuminated by the inspected portion from above; detecting a protruding amount of the inspected portion from the article from the captured image to determine that the packaging is defective. A film packaging inspection device comprising: a packaging failure determination unit that determines whether or not the packaging is defective. 6. A film packaging inspection device for a product, wherein the product is packaged with a transparent film, wherein the product has a number of parallel grooves formed on a corresponding surface located inside a side portion of the product. A transport conveyor for transporting the product; lighting means for illuminating a portion to be inspected on a side portion of the product being transported by the transport conveyor; and A film packaging inspection apparatus, comprising: an imaging unit arranged to capture an image from an oblique direction with respect to a corresponding surface; and a packaging failure determination unit configured to determine whether the packaging is defective based on the captured image. 7. A film packaging inspection device for a product, wherein an article is wrapped with a transparent film, comprising: a transport conveyor for transporting the product; and a guide for guiding the product during transport to transport the part of the product. A guide body that protrudes laterally from the conveyor, imaging means arranged to image a part of the packaging of the protruding product from above or below, and whether the packaging is defective based on the captured image A film packaging inspection device comprising: a packaging failure determination unit that determines whether the package is defective. 8. The guide body according to claim 7, wherein the guide body is configured to rotate an end contacting a part of the front end of the product and the product contacting the end by 90 ° by the conveying force of the conveying conveyor. And a side edge portion for guiding the product in a transport direction of a transport conveyor. 9. The film packaging inspection apparatus according to claim 5, further comprising an air jetting unit that blows air at the time of imaging so that a defect of the packaging of the inspection target part becomes prominent.