JPH10339682A - Device and method for inspecting leakage of container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and method for detecting leakage in a container that eliminates the load of an operator and can improve the accuracy of a leakage inspection. SOLUTION: In an inspection liquid applying device 20, the film of an inspection liquid that allows foam to be generated by the airtight leakage of a can 80 is applied to a part to be inspected, and the image of the part to be inspected is picked up by imaging devices 40 and 41 immediately after the inspection liquid is applied and after the inspection liquid is applied and a specified time passes, the change in expanded state at the part to be inspected is recognized based on image information being sent by the imaging devices 40 and 41, and the absence and presence of the leakage in the container is judged based on the change, thus eliminating the load of an operator, preventing the container leakage from being overlooked, and hence improving the accuracy of airtight leakage inspection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leak inspection apparatus and an inspection method for inspecting an airtight leak of a container such as an 18-liter can.

[0002]

2. Description of the Related Art A differential pressure type air leak inspection has been conventionally performed as an airtight leak inspection after completion of a container such as an 18-liter can, for example. That is, by injecting compressed air into the completed container to set the pressure in the container to, for example, 10 to 20 Kpa, and measuring the pressure in the container again after a predetermined time elapses, the inside of the container before and after the predetermined time elapses A leak test is performed by detecting the pressure difference. However, in such a differential pressure type air leak inspection, the pinhole diameter is 100 μm.
The relatively large leak described above can be detected, but a small leak smaller than that cannot be detected. Therefore, in order to detect even the above-mentioned minute leak, after injecting compressed air into the container of the inspection object, soap water is applied to a portion of the container where the airtight leak is relatively likely to occur. By doing so, if there is the above-mentioned minute leak, bubbles, so-called crab bubbles, are generated in the leaked portion by the soapy water. Therefore, by recognizing the presence / absence of the bubble, the presence / absence of the minute leak can be determined. However,
Conventionally, the presence or absence of the occurrence of bubbles has been visually determined by the operator, and there is a problem that the continuous operation at a high speed places a heavy burden on the operator and may cause a leak container to be overlooked. Was. The present invention has been made to solve such a problem, and an object of the present invention is to provide a container leakage inspection device and an inspection method capable of eliminating the burden on an operator and improving the accuracy of leakage inspection. I do.

[0003]

According to a first aspect of the present invention, there is provided a container leak inspection apparatus in which a film of a test solution for generating bubbles due to airtight leakage of a container to be inspected is formed at a location to be inspected on the outer surface of the container. A leak inspection device for a container, immediately after the formation of the test liquid film, and a photographing device that photographs at least the inspected portion after a lapse of a leaving time suitable for photographing after the formation of the test liquid film, Based on the image information sent by the photographing device, a change in the foaming state of the inspection location immediately after the formation of the test liquid film and after the lapse of the standing time is recognized, and the presence or absence of leakage of the container is determined based on the change. And an analyzing device.

Further, in the container leakage inspection method according to the second aspect of the present invention, when a leakage inspection is performed under atmospheric pressure, the pressure in the container to be inspected is increased to an inspection pressure higher than the atmospheric pressure, and the pressure in the container is increased. Before or after the pressurization of the atmospheric pressure, a film of a test liquid that causes bubbles due to airtight leakage of the container is formed at a location to be inspected on the outer surface of the container, and immediately after the formation of the test liquid film, and the test liquid film At least after the elapse of the standing time suitable for photographing, the foamed state is photographed at least after the formation of the test liquid. It is characterized by recognizing a change in the foaming state of the inspected portion later and judging the presence or absence of leakage of the container based on the change.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A container leakage inspection apparatus and an inspection method according to one embodiment of the present invention will be described below with reference to the drawings. The inspection method is executed by the inspection device. In each drawing, the same components are denoted by the same reference numerals. In addition, the following test liquid application device 20 corresponds to one embodiment that fulfills the function of the test liquid film forming device. Also, in the following description,
As shown in FIG. 6, the body plate 82 is welded along the axial direction of the container to form a welded portion 81, and the body plate 82, the top plate 83, and the main plate 84 are formed by being wound, respectively.
A liter can 80 (hereinafter simply referred to as “can 80”) is taken as an example, but the container to be inspected is not limited to this.

As shown in FIG. 1, a container leak inspection apparatus 100 according to the present embodiment is capable of performing a conventional leak inspection on a can 80 and has a conventional inspection apparatus 10 having a pressurizing device 1.
The test liquid application device 20, the first photographing device 40, and the second
It has a configuration including an imaging device 41 and an analysis device 60. Hereinafter, these components will be described. The conventional inspection apparatus 10 is provided as a plurality of units at equal intervals on the disk 2 rotating in the direction of arrow I, and the cans 80 are arranged at equal intervals in each unit. A pressurizing device that automatically pressurizes each can 80 placed under atmospheric pressure to a test pressure exceeding atmospheric pressure and automatically returns to atmospheric pressure after a predetermined time has elapsed. One. In addition, when the can 80 is placed around the disc 2,
The can 80 is placed so that the welded portion 81 of the can 80 is oriented on the outer peripheral side of the disk 2 and along the diametrical direction. When the can 80 is placed on the disk 2, the pressurizing device 1 pressurizes the inside of the can to the test pressure. The test pressure is a pressure specified by JIS (Japanese Industrial Standard), specifically, 10 to 20 Kpa.

In the present embodiment, the test liquid application device 20 is located at a position where the pressurization in the can 80 is completed, and at a position where the test liquid can be applied to the inspection point 85 of the can 80.
The inspected portion 85 is a portion where airtight leakage is most likely to occur in various containers to be inspected. In the present embodiment, the welded portion 81 of the can 80 intersects the tightened portion 86 between the body plate 82 and the base plate 84. Parts correspond. Further, as in the present embodiment, it is preferable to apply the test liquid to the can 80 after the pressurization of the can 80 is completed. However, the time before and after the pressurization and the test liquid application are not limited. As shown in FIG. 4, the test liquid application device 20 according to the present embodiment includes a tank 21 for storing the test liquid 22, a brush 23 for applying the test liquid 22 to a location 85 to be inspected, and a test from the tank 21 to the brush 23. A metering pump 24 for dropping the liquid 22 by a fixed amount.
The test liquid 22 does not generate bubbles when the test liquid film is formed at the inspection location 85, and also generates bubbles due to airtight leakage of the container to be inspected. In the present embodiment,
As will be described later, since the state of occurrence of bubbles due to the hermetic leakage is recognized by image processing, a test liquid that simply generates a large amount of bubbles is not preferable, and the amount of bubbles that is appropriate for the image processing is described below. The test solution generated within the standing time is preferable. In this embodiment, 95% of a nonionic surfactant, 3% of a wetting material, and 2% of a rust preventive additive are used as the test liquid 22 in this embodiment.
The stock solution of the soap water consisting of the above components is diluted 70- to 90-fold. The amount of the test liquid 22 dropped from the metering pump 24 is about 2 to 3 drops, or about 0.5 cc, per can 80 in the present embodiment.

The method of forming the film of the test liquid 22 on the inspection point 85 is not limited to the method using the brush 23 of the present embodiment, but may be, for example, spraying the test liquid 22 with a spray. There is a way. However, it is necessary to prevent generation of unnecessary bubbles when the film of the test liquid 22 is formed. In addition, the test solution 2 for the inspection location 85
It is desirable to provide a device for confirming that the formation of the film 2 is performed surely and an alarm device.

Further, in the present embodiment, in the rotation direction of the disk 2, the test liquid application device 20 and the first photographing device
Between 0 and 0, the liquid dripping wiping device 30 is installed. The amount of the test liquid 22 applied to the inspection location 85 by the test liquid application device 20 is excessive, and the lower end 86 of the tightening portion 86 of the can 80
When the water droplet 31 is formed on the first photographing device 4 described later,
At 0, the water droplet 31 may be photographed and adversely affect image processing. That is, as will be described later, in the present embodiment, the base plate 84 and the body plate 8 are used as a reference for setting the measurement area 61.
2, the water drop 31 may be erroneously set as the reference when the water drop 31 exists. Therefore, it is preferable to remove the water droplet 31. Therefore, in the present embodiment, the liquid dripping wiping device 30 is installed to remove the water droplet 31. Such liquid dripping wiping device 3
5, a brush 32 that contacts the lower end 86a of the tightening portion 86 to remove the water droplet 31 and a compressed air 32 for blowing out the test liquid 22 accumulated in the brush 32.
And an air nozzle 33 for jetting toward the air nozzle. still,
The air nozzle 33 is connected to a compressed air source 34.

The first photographing device 40 and the second photographing device 41 will be described. The first photographing device 40 is for photographing the initial state of the inspected portion 85 to which the test liquid 22 is applied, while the second photographing device 41 is for photographing the inspected portion 85 after the elapse of the leaving time from the initial state. This is for photographing the state of the location 85. Therefore, the first photographing device 40
It is preferably arranged immediately after the test liquid application device 20 along the direction of arrow I, which is the direction of rotation of the disk 2 of the test device 10. In this embodiment, it is arranged immediately after the above-mentioned liquid dripping wiping device 30. Specifically, the first photographing device 40 applies the test liquid 22 to the area including the inspection location 85 by the inspection liquid application device 20 and then, after 1 to 2 seconds,
Is preferably arranged at a position where an image including an area is photographed. In the case where there is an airtight leak, bubbles are generated by the test liquid 22 applied to the portion 85 to be inspected. However, if the amount of generated bubbles is too large, light diffusely reflected by the bubbles is excessively increased. For example, the entire image after image processing becomes white, for example, which is inconvenient in image processing. On the other hand, if the amount of the generated bubbles is too small, it is difficult to recognize a change from the initial state. Therefore, it is necessary to take an image of the inspected portion 85 with the second imaging device 41 when the amount of bubbles is appropriate. Therefore, it is preferable that the second photographing device 41 photograph the region including the inspection location 85 after the photographing is performed by the first photographing device 40 and after the above-mentioned leaving time of 3 to 10 seconds.
In the present embodiment, the can 80 is attached to the disc 2 rotating in the direction of arrow I.
Is placed, the second photographing device 41 is located along the outer periphery of the disk 2 and after the photographing is performed by the first photographing device 40, after 3 to 10 seconds, the above-described inspection It is arranged at a position where an area including the location 85 can be photographed.
In addition, since the amount of the generated bubbles is correlated with the components and the concentration of the test liquid 22 described above, the leaving time of 3 to 10 seconds varies depending on the components and the concentration of the test liquid 22. In a preferred embodiment, the second imaging device 41 is located along the outer periphery of the disk 2 and includes the inspected portion 85 again four seconds after the first imaging device 40 has taken an image. The region is arranged at a position where photographing can be performed.

The first photographing device 40 and the second photographing device 41 have the same configuration, and the structure will be described by taking the first photographing device 40 as an example. As shown in FIG. 2, the first imaging device 40 includes at least
A camera 42 for photographing the area No. 5, a first light source 43, and a second light source 44 are provided. The camera 42 is connected to the base plate 8 of the can 80.
The winding portion 86 between the body 4 and the body plate 82 is positioned substantially at the center of the photographing area, and is arranged at a position where the distance from the winding portion 86 to the tip of the lens of the camera 42 becomes II during photographing. Is done. The dimension II is 115 mm in a preferred embodiment. The first light source 43 is opposed to the tightening portion 86 of the main plate 84 and the body plate 82 at the time of photographing, and from the lower end 86a of the tightening portion 86 immediately below the tightening portion 86 along the axial direction of the can 80. The light source is arranged at a position where the distance is equal to the dimension III, and mainly emits light to the tightening portion 86 to increase the brightness of the tightening portion 86 as compared with other portions. As will be described later, it is necessary to set a measurement area for observing the foaming state at the inspection point 85 in the image supplied from the camera 42. In the present embodiment, a predetermined area set based on a certain reference line is used as a reference. The area is defined as the measurement area. Therefore, it is necessary to determine the reference line, and the first light source 43 makes the tightened portion 86 brighter than other portions to recognize the reference line. Also, the first light source 43
Uses a halogen lamp in one preferred embodiment,
The dimension III is about 120 mm. Second light source 44
Is a light source that mainly emits light to the inspection location 85 and generates irregular reflection due to bubbles. In the present embodiment,
The position where the distance from the lower end 86a of the tightening portion 86 to the upper side along the axial direction of the can 80 becomes the dimension IV and the can 8
It is arranged at a position where the distance along the diametrical direction of the disk 2 from the welded portion 81 of the zero is the dimension V. Also, the second light source 44
Uses a halogen lamp in one preferred embodiment,
The dimension IV is 160 to 170 mm, and the dimension IV is
V is 40 mm. In the camera 42 of the first imaging device 40 and the second imaging device 41 configured as described above,
An imaging area as shown in FIG. 3 is obtained. Table 1 shows measurement conditions in the first imaging device 40 and the second imaging device 41.

[0012]

[Table 1]

The analysis device 60 is connected to each of the cameras 42 and 42 provided in the first and second photographing devices 40 and 41, and the hermetic leakage of the can 80 based on the image information supplied from each of the cameras 42 and 42. Is determined. That is, the analysis device 60 first performs image processing on the white and black images of the image information supplied from the camera 42 of the first imaging device 40 in accordance with the binarization levels shown in Table 1 above. Further, based on such image processing information, the analysis device 60 mainly increases the brightness of the first light source 43 as compared with the other portions, that is, the above-mentioned white tightening portion, as described above. After recognizing 86 as a reference line, the measurement area 61 is set at a height of a predetermined dimension from the recognized tightened portion 86. The measurement area 61
The width VI corresponds to the width of the shooting area of the camera 42. In a preferred embodiment, the width VI is 42.5 mm,
The predetermined dimension VII is 4.5 mm. Therefore, the size of the measurement area 61 is 4.5 mm × 42.5 mm.
Becomes The region 8 indicated by a two-dot chain line in FIG.
Reference numeral 8 denotes a varnish removal portion. The size of the measurement area 61 is
It can be appropriately changed according to the type of the container to be inspected and the like. Further, the analysis device 60 counts and stores, for example, the number of pixels determined to be white as described above, out of the total number of pixels in the measurement area 61 for the first imaging device 40. The number of pixels determined to be white is hereinafter referred to as a “binarized value”. The above-described binarized value obtained based on the image information of the first photographing device 40 is defined as a first binarized value.

When the can 80 reaches the position where the second photographing device 41 takes a picture with the rotation of the disk 2, the camera 42 of the second photographing device 41 takes a picture of the area including the inspection location 85. In the present embodiment, the first photographing device 40 uses the can 80.
The time from the time when is photographed to the time when the can is photographed by the second photographing device 41 corresponds to the idle time. The analysis device 60 sets the measurement area 61, counts and stores the binarized value for the image information obtained from the camera 42 of the second imaging device 41 in the same manner as in the case of the imaging by the first imaging device 40 described above. Do. The above-described binarized value obtained based on the image information of the second photographing device 41 is defined as a second binarized value. In the case of the can 80 having an airtight leak, the number of bubbles in the inspection location 85 is larger at the time of imaging with the second imaging device 41 than at the time of imaging with the first imaging device 40. Since the light mainly from the second light source 44 is irregularly reflected by the bubbles and is received by the camera 42 of the second photographing device 41, in the case of the can 80 having an airtight leak, the binarized value in the measurement area 61 is The number of times of shooting with the second shooting device 41 is larger than the time of shooting with the first shooting device 40. Therefore, when the counting and storage of the binarized value for the image information supplied from the second photographing device 41 is completed, the analyzing device 60 calculates the second binarized value obtained based on the second photographing device 41 from the second binarized value. The first binarized value obtained based on the first photographing device 40 is subtracted.

On the other hand, light is irregularly reflected by the scratches or deformation of the can 80, and the inspection liquid application device 20 causes the inspection target 85 to be inspected.
When the test liquid 22 is applied to a region including the above, the bubbles may cause irregular reflection of light. In order to remove a so-called noise component caused by other than such an airtight leak, in the analysis device 60, a value obtained by subtracting the first binary value from the second binary value exceeds a predetermined threshold value. Only in this case, it is determined that the can 80 has an airtight leak. Of course, when the subtraction value is equal to or less than the threshold value, it can be determined that there is no or almost no change in the binarized value in the measurement area 61, that is, no or almost no bubble is generated. it can. According to the experiment of the applicant, the binarized value due to the noise component was substantially “80” or less.
“80” is adopted as the threshold value. In addition, the airtight leak having a binarized value of “80” corresponds to the generation of 3 to 4 bubbles having a diameter of about 1.5 mm,
This corresponds to a pinhole having a diameter of about 10 μm. In practice, it is sufficient to detect a pinhole having a diameter of about 50 μm, so that the threshold value of “80” can be determined to be an appropriate value. Needless to say, the threshold value can be appropriately changed depending on the type of the container to be inspected. Table 2 shows specific values of the binarization value, visual judgment, estimated pinhole diameter, and the like for various cans 80 having an airtight leak.

[0016]

[Table 2]

In the present embodiment, the conventional inspection apparatus 10 is used, and the disc 2 rotates and the can 80 is placed on the disc 2, so that the first photographing apparatus 40 and the second photographing apparatus 41 are used. With 2
A set is installed, but is not limited to this. For example, only one set of photographing devices is installed, photographing is performed immediately after the test liquid 22 is applied to the region including the inspection location 85, and the analysis device stores the first binarized value. After the lapse of the above-described predetermined time, the photographing is performed again to obtain the second binarized value. Then, the analysis device may subtract the first binarized value from the second binarized value to determine whether there is an airtight leak. Further, for example, a printer 70 can be connected to the analysis device 60, and the inspection result for each can 80 can be printed.

The operation of the thus configured container leakage inspection apparatus 100 of this embodiment will be described below. After the can 80 is placed on the outer peripheral portion of the disk 2 of the existing inspection device 10 so that the inspection point 85 is oriented in the diameter direction of the disk 2, the inside of the can 80 is And pressurize to a predetermined inspection pressure. With the rotation of the disk 2, the pressurized can 80
In the area including the inspection location 85 of the inspection liquid application device 20
The test solution 22 is applied at
Is dripped from the winding portion 86 of the can 80, the water droplets are wiped by the liquid dripping wiping device 30. Furthermore, disk 2
When the can 80 reaches the photographing area of the first photographing device 40 with the rotation of the CCD camera 4, the CCD camera 4 of the first photographing device 40
The area including the inspected portion 85 is photographed by 2, and the image information is sent to the analyzer 60. Analysis device 60
Then, the measurement area 61 is set as described above, and the first binarized value in the measurement area 61 is measured. Further, with the rotation of the disk 2, the can 80 is placed in the photographing area of the second photographing device 41.
Is reached, the region including the inspection location 85 is photographed by the CCD camera 42 of the second photographing device 41,
The image information is sent to the analyzer 60. Analysis device 6
At 0, the measurement area 61 is set and the second binarized value in the measurement area 61 is measured as in the case of the first imaging device 40. When the second binarized value is measured, the analysis device 60 subtracts the first binarized value from the second binarized value, and the subtraction value is set in advance. It is determined whether or not the threshold value exceeds “80”. And
If the subtraction value exceeds the threshold value “80”,
It is determined that the can 80 has an airtight leak. On the other hand, when the subtraction value is equal to or less than the threshold value “80”, the can 80 is determined to have no airtight leak, that is, a good can. As described above, the cans 80 arranged at equal intervals on the outer peripheral portion of the disk 2 are sequentially inspected according to the rotation of the disk 2 to continuously determine the presence or absence of airtight leakage. The second photographing device 41
After the photographing of the can 80 is completed, the pressurizing device 1 returns the pressure in the can 80 to the atmospheric pressure state. Also, cans that are determined to have airtight leaks are:
In a reject device provided at the subsequent stage of the inspection device 100, the signal is removed from the production line by a signal from the analysis device 60.

As described above, according to the container leak inspection apparatus 100 of the present embodiment, the load on the worker can be eliminated by performing the determination of the presence / absence of bubbles due to the airtight leak by the analyzer 60. Since the leakage container is not overlooked, the accuracy of the airtight leakage inspection can be improved.

In this embodiment, since the conventional inspection apparatus 10 is used, the apparatus 1 includes the pressurizing device 1 for the can 80. However, the pressurizing device 1 is not an essential component.
That is, for example, when a container in a pre-pressurized state is supplied, or when a pressure difference can be generated inside and outside the container without pressurizing the inside of the container, such as when the outside of the container is depressurized to the atmospheric pressure or less. Does not require the pressurizing device 1.

In the present embodiment, the test liquid application device 20
And the test liquid 22 is automatically applied to the can 80,
The film of the test liquid 22 may be formed on the can 80 manually by an operator without providing the test liquid coating device 20.

Further, in the present embodiment, the tightening portion 86 between the main plate 84 and the body plate 82 of the can 80 is set as the reference line, but the present invention is not limited to this. Depending on the type of container to be inspected, there may not be a tightened portion.In such a case, for example, a characteristic portion in the outer shape of the container, such as a concave portion or a convex portion, is used as the reference line, or an aluminum tape is used. The reference line may be appropriately set by, for example, attaching an adhesive tape capable of reflecting light as described above to the container. Note that, depending on the method of setting the reference line, it is necessary to change the arrangement of the above-described first light source 43 and the like in the present embodiment.

[0023]

As described above in detail, according to the container leakage inspection apparatus of the first aspect and the container leakage inspection method of the second aspect of the present invention, an inspection liquid film forming apparatus, a photographing apparatus, and an analyzing apparatus are provided. From this, it is possible to recognize a change in the foaming state of the inspected portion immediately after forming the test liquid film that generates bubbles due to airtight leakage at the inspected portion of the container, and after the passage of the standing time, and to recognize the change in the foaming state. Based on this, it is possible to determine whether or not the container has an airtight leak. Therefore, the load on the worker can be eliminated, and the leakage container is not overlooked, so that the accuracy of the airtight leakage inspection can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a container leakage inspection device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a first imaging device and a second imaging device illustrated in FIG. 1;

FIG. 3 is a diagram showing a region photographed by a first photographing device and a second photographing device shown in FIG. 2, and a measurement region.

FIG. 4 is a diagram showing a configuration of the test liquid application device shown in FIG.

FIG. 5 is a view showing a configuration of a liquid dripping wiping device shown in FIG. 1;

FIG. 6 is a perspective view of an 18-liter can, which is an example of a container inspected by the container leak inspection device shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pressurizing device, 10 ... Inspection device, 20 ... Inspection liquid application device, 30 ... Liquid dripping wiping device, 40 ... First imaging device, 41
... Second imaging device, 42 CCD camera, 43 First light source, 44 Second light source, 60 Analysis device, 80 Can, 85
... Inspection location, 86 ... Winding part, 100 ... Container leak inspection device.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroyasu Nakamura 1 Shinjamacho, Chuo-ku, Chiba-shi, Chiba Prefecture Inside Kawatetsu Container Co., Ltd. No. 13 Osaka International Building Minolta Co., Ltd. (72) Inventor Koichi Nomura 2-3-13 Azuchicho, Chuo-ku, Osaka

Claims (12)

[Claims] 1. A leak inspection apparatus for a container formed at a location to be inspected on an outer surface of the container, wherein the film of the inspection liquid that generates bubbles due to airtight leakage of the container to be inspected is provided. And an imaging device (40, 41) for imaging at least the inspected portion after a lapse of a standing time suitable for imaging after the formation of the inspection solution film.
Recognizing a change in the foaming state of the inspected portion immediately after the formation of the test liquid film and after the elapse of the standing time based on the image information sent by the photographing device, and based on the change, whether the container is leaked or not. An analyzer for judging the condition of the container (60). 2. The container leakage inspection apparatus according to claim 1, further comprising an inspection liquid film forming apparatus (20) for forming a film of the inspection liquid on the inspection target portion. 3. When performing a leak inspection of a container under atmospheric pressure,
3. The container leak inspection device according to claim 1, further comprising a pressurizing device (1) that pressurizes a pressure in the container to an inspection pressure exceeding atmospheric pressure before or after the formation of the test liquid film. . 4. The inspection location is an area extending from the reference line to the axial direction of the container with the tightened portion (86) of the body plate and the top plate or the base plate forming the container as a reference line. The container leakage inspection device according to any one of claims 1 to 3. 5. The camera according to claim 1, wherein the camera is arranged along a direction orthogonal to an axial direction of the container, the camera being opposed to a tightening portion (86) of a body plate and a top plate or a base plate forming the container. The leak inspection apparatus for containers according to any one of claims 1 to 4, further comprising (42) and a light source (43, 44) for supplying light necessary for photographing by the camera. 6. The camera according to claim 1, wherein the camera is disposed along a direction perpendicular to an axial direction of the container, the camera being opposed to a tightening portion (86) between a body plate and a top plate or a base plate forming the container. (42) and arranging the tightened portion photographed by the camera on an extension line along the axial direction of the container and projecting light onto the photographed tightened portion to set the tightened portion to the reference. A first light source (43) for providing brightness to be recognized as a line, and a light which is disposed on the opposite side of the camera from the first light source and emits light necessary for causing the inspected portion to recognize a foaming state. 5. A device according to claim 4, further comprising a second light source. 7. The analyzer according to claim 1, wherein a value obtained by subtracting the binarized value of the image information immediately after the formation of the test liquid film from the binarized value of the image information after the elapse of the standing time at the inspection location is obtained. The container leakage inspection device according to any one of claims 1 to 6, wherein it is determined that there is leakage when the threshold value is exceeded. 8. The test liquid is a solution that does not generate bubbles when the test liquid film is formed, and generates bubbles after the standing time when the container has an airtight leak. A container leakage inspection device according to any one of claims 1 to 7. 9. The leak inspection apparatus for a container according to claim 8, wherein the inspection liquid is a solution obtained by diluting a stock solution containing a nonionic surfactant, a wetting agent, and a rust preventive additive 70 to 90 times. 10. Immediately after the formation of the test liquid film, 1 to 2 seconds after the formation of the test liquid film, and after elapse of the standing time, 3 to 10 seconds after the formation of the test liquid film. Is,
A container leakage inspection device according to any one of claims 1 to 9. 11. The leak inspection apparatus for containers according to claim 3, wherein the inspection pressure is 10 to 20 Kpa. 12. When performing a leak test under atmospheric pressure, pressurize the inside pressure of a container to be inspected to an inspection pressure exceeding atmospheric pressure, and before or after pressurizing the inside pressure of the container, A film of a test liquid that causes bubbles due to airtight leaks is formed at a location to be inspected on the outer surface of the container, and immediately after the formation of the test liquid film, and after the test liquid film is formed, the foaming state is a time period suitable for imaging. At least after the lapse of time, the inspected portion is photographed, and a change in the foaming state of the inspected portion immediately after the formation of the test liquid film and after the lapse of the standing time is recognized based on image information obtained by photographing the inspected portion. And determining whether or not the container leaks based on the change.