JP2012103020A - Leakage inspection and appearance inspection device of pet bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leakage inspection and appearance inspection device of a PET bottle whose main rotor for performing a leakage inspection and an appearance inspection of the PET bottle can be made into one and the head of which has no leakage of air.SOLUTION: A leakage inspection and appearance inspection device of the PET bottle includes: a first inspection station S1 consisting of a main rotor 4 which supports a PET bottle 1 to be conveyed; a vessel holding head 35 which seals a mouth part 1m of the PET bottle 1 to supply gas into the bottle, one illumination LED1 arranged outside the radial direction of a circular orbit, and at least two cameras CAM1-a and CAM2-a which are arranged inside the radial direction of the circular orbit; and a second inspection station S2 consisting of one illumination LED2 arranged inside the radial direction of the circular orbit, and at least two cameras CAM3-a and CAM4-a which are arranged outside the radial direction of the circular orbit. The whole circumference of a middle part of the PET bottle 1 can be inspected by the inspection stations S1 and S2.

Description

  The present invention relates to a PET bottle leak inspection and appearance inspection apparatus, and more particularly, to fill a PET bottle with compressed air in order to detect defects such as pinholes before filling the PET bottle with a liquid such as a beverage. In addition to performing a leak inspection to inspect whether compressed air leaks from a PET bottle, a PET bottle leak inspection and an appearance inspection to inspect the body and mouth side of the PET bottle for scratches and foreign matter It relates to the device.

  Conventionally, PET bottles (PET bottles), which are lightweight plastic bottles, are frequently used for filling soft drinks and the like. Before filling a PET bottle with a liquid such as a beverage, it is necessary to inspect the PET bottle for defects such as pinholes, and a PET bottle leak inspection has been conventionally performed. In this leak test, the PET bottle is placed on the container table of the main rotor, the head is lowered and brought into contact with the mouth of the PET bottle, and the mouth of the PET bottle is sealed with the head packing. Then, compressed air is supplied from the compressed air source into the PET bottle through the head. Then, after supplying a predetermined amount of compressed air into the PET bottle, the inside of the PET bottle is sealed, and the PET bottle is conveyed along the circular path by the main rotor, and a pressure sensor connected to the head after a predetermined time has passed. The pressure inside the plastic bottle is measured to detect a leak from the plastic bottle.

  In addition, after performing a leak inspection device, an appearance inspection is performed such as whether there are any scratches or foreign matter adhering on the body and the side of the mouth of the PET bottle. In this visual inspection, the plastic bottle is placed on the container table of the main rotor, the mouth of the plastic bottle is held by the head, the plastic bottle is rotated while being transported along the circular path, and the plastic bottle is rotated. Appearance inspection is performed by photographing the entire circumference of the torso and the entire circumference of the mouth side surface with a camera.

Thus, in order to perform a leak inspection and an appearance inspection of a PET bottle, it is necessary to install two main rotors, a main rotor for a leakage inspection and a main rotor for an appearance inspection, and the apparatus becomes large. In addition, the weight increases, which may hinder transportation and installation. In addition, there is a problem that the number of parts increases and the apparatus becomes expensive. Further, when the PET bottle is square, there is a problem that the direction regulation for aligning the square PET bottle in the same direction after the appearance inspection is required, and the apparatus is further increased in size.
Therefore, the present applicant has proposed a container inspection apparatus capable of performing a leak inspection of a PET bottle and an appearance inspection in which an inspection is performed while rotating the PET bottle with a single main rotor in Patent Document 1. Is.

JP 2003-35623 A

  However, in the apparatus disclosed in Patent Document 1, the mouth of the PET bottle is sealed with the packing of the head, and after supplying compressed air from the compressed air source into the PET bottle through the head in this state, In order to rotate, it is necessary to rotate the head holding the mouth of the plastic bottle. However, since the compressed air is supplied to the PET bottle via the head, when the head is rotated, the leakage of air cannot be suppressed at the rotating and balancing portion of the head. There is a problem that the leak inspection accuracy cannot be obtained because the air cannot be completely sealed.

  The present invention has been made in view of the above-described circumstances, and can have a single main rotor for performing a leak inspection and an appearance inspection of a plastic bottle, making the entire inspection apparatus compact and leaking. An object of the present invention is to provide a PET bottle leak inspection and appearance inspection apparatus that does not cause air leakage in a leak inspection section such as a head during inspection.

  In order to achieve the above-described object, the present invention provides a main rotor that supports a plurality of plastic bottles and conveys them along a predetermined circular path, and is installed in the main rotor and engages with a mouth of the plastic bottle. A plurality of container pressing heads that seal the mouth and supply gas into the PET bottle, and are arranged at predetermined positions on the circular orbit of the main rotor, illuminate the PET bottle conveyed by the main rotor, A plurality of inspection stations that inspect the appearance of the PET bottles by photographing the transmitted light of the plurality of inspection stations, and the plurality of inspection stations include one illumination arranged radially outside the circular orbit and a radius of the circular orbit A first inspection station comprising at least two cameras arranged on the inner side in the direction, one illumination arranged on the inner side in the radial direction of the circular track, and A second inspection station comprising at least two cameras arranged radially outward of the shaped track, and the entire circumference of the body of the plastic bottle can be inspected by the first inspection station and the second inspection station. It is characterized by being.

  According to the present invention, with the rotation of the main rotor, the plastic bottle is transported along a circular track, and during this transport, the container presser head abuts the mouth of the plastic bottle and seals the mouth. In the plastic bottle to start the leak test. During the leak inspection, as the main rotor rotates, the plastic bottle reaches the first inspection station, and the plastic bottle is illuminated by one illumination device arranged radially outside the circular track. The transmitted light from the plastic bottle is imaged by at least two cameras arranged on the inner side in the radial direction. Thereby, the half circumference or more than half circumference of the trunk | drum of a PET bottle is imaged. Further, as the main rotor rotates, the PET bottle reaches the second inspection station, and the PET bottle is illuminated by a single illumination arranged radially inside the circular track, and the radially outer side of the circular track. The transmitted light from the PET bottle is imaged by at least two cameras arranged in the. Thereby, the remaining half or more than half of the trunk of the plastic bottle is imaged. By processing the obtained image with an image processing device, an appearance inspection is performed on the entire circumference of the trunk of the plastic bottle.

In a preferred aspect of the present invention, at least two cameras arranged at the first inspection station are approximately 60 ° to 70 ° centered on the plastic bottle with respect to the plastic bottle at the imaging position of the first inspection station. It is in a separated position.
In a preferred aspect of the present invention, two cameras are arranged at the top and bottom at each position of the first inspection station.

In a preferred aspect of the present invention, at least two cameras arranged in the second inspection station are approximately 60 ° to 90 ° centered on the plastic bottle with respect to the plastic bottle at the imaging position of the second inspection station. It is in a separated position.
In a preferred aspect of the present invention, two cameras are arranged at the top and bottom at each position of the second inspection station.

According to a preferred aspect of the present invention, there is provided a cam installed at a fixed portion of the main rotor, a cam follower connected to the container presser head and capable of contacting the cam, and the cam follower is rotated along with the rotation of the main rotor. By moving the container pressing head while making contact with the cam, the container pressing head can be moved up and down to engage the container pressing head with the mouth of the PET bottle.
According to the present invention, as the main rotor rotates, the container presser head moves up and down by the action of the cam and the cam follower, and the container presser head can be engaged with the mouth of the plastic bottle.

In a preferred aspect of the present invention, the container presser head moves only up and down and does not rotate around its own axis.
According to the present invention, the container presser head only moves up and down, and does not rotate around its own axis, so that the leak inspection unit including the container presser head does not leak air and performs a leak test with high accuracy. It can be carried out.

In a preferred aspect of the present invention, the first inspection station and the second inspection station are capable of photographing the entire circumference of the mouth side surface of the plastic bottle.
In a preferred aspect of the present invention, an inspection station for photographing the entire circumference of the mouth side surface of the PET bottle is provided separately.

The present invention has the following effects.
(1) The main rotor for performing the PET bottle leak inspection and the appearance inspection can be made one, and the entire inspection apparatus can be made compact. Therefore, the inspection apparatus can be easily transported and installed, the number of parts can be reduced, and the apparatus cost can be reduced.
(2) Since it is not necessary to rotate the head and the PET bottle in order to perform the appearance inspection of the entire circumference of the trunk of the PET bottle and / or the entire circumference of the mouth side surface, air leakage may occur in the leak inspection section such as the head. Therefore, it is possible to perform a leak inspection with high accuracy.
(3) Since it is not necessary to rotate the PET bottle to perform the appearance inspection of the PET bottle, the entire inspection apparatus can be transported without changing the direction of the PET bottle. Therefore, a plurality of inspection stations can be distributed and arranged at optimal positions in order to inspect the appearance of each part of the PET bottle, and the accuracy of the appearance inspection of the PET bottle can be improved.

FIG. 1 is a plan view showing the overall configuration of a PET bottle leak inspection and appearance inspection apparatus. FIG. 2 is a diagram showing a detailed structure of the main rotor for inspection, and is a cross-sectional view of the main rotor. FIG. 3 is a diagram showing the detailed structure of the head, the configuration of peripheral devices of the head, and the configuration of the container base. FIGS. 4A and 4B are schematic views showing the configuration of two appearance inspection stations arranged along the circular orbit of the inspection main rotor. FIG. 4A is a plan view, and FIG. FIG. 4B is a view taken along line IV-IV in FIG.

Hereinafter, embodiments of a PET bottle leak inspection and appearance inspection apparatus according to the present invention will be described with reference to FIGS. 1 to 4, the same or corresponding components are denoted by the same reference numerals, and redundant description is omitted.
FIG. 1 is a plan view showing the overall configuration of a PET bottle leak inspection and appearance inspection apparatus. As shown in FIG. 1, the PET bottle leak inspection and appearance inspection apparatus receives an inlet screw 2 for forming a fixed interval in the PET bottle 1 to be inspected, and receives and transports the PET bottle 1 from the inlet screw 2. The entrance star wheel 3, the inspection main rotor 4 for inspecting the PET bottle 1 for leak inspection and the appearance inspection of the PET bottle 1, and the inspected PET bottle 1 are separated into good products and defective products and discharged. And an exit star wheel 5 for the purpose. In addition, an airflow conveyor AFC1 for carrying the PET bottle 1 into the inspection device is installed adjacent to the inlet screw 2, and an airflow conveyor AFC2 for carrying the PET bottle 1 out of the inspection device is an exit star wheel. It is installed adjacent to 5.

As shown in FIG. 1, two appearance inspection stations S <b> 1 and S <b> 2 are arranged along a circular path of the inspection main rotor 4. In these appearance inspection stations S1 and S2, lighting and a camera are arranged, and each part of the PET bottle 1 is imaged to perform an appearance inspection. In the example shown in FIG. 1, a visual inspection is performed by imaging half or more than half of the body and mouth side of the plastic bottle 1 at the appearance inspection station S1, and the body and mouth side of the plastic bottle 1 at the appearance inspection station S2. Visually inspect the remaining half or more than half. In addition, the appearance inspection stations S1 and S2 may be divided into two appearance inspection stations, and the body portion of the PET bottle 1 and the mouth side surface of the PET bottle 1 may be individually imaged and inspected.
In addition, the entrance star wheel 3 is provided with an appearance inspection station S3 that performs an appearance inspection by imaging the bottom of the PET bottle 1.

  FIG. 2 is a diagram showing a detailed structure of the main rotor for inspection, and is a cross-sectional view of the main rotor. As shown in FIG. 2, the inspection main rotor 4 is rotationally driven by a drive source (not shown) and is connected to the upper and lower rotary shafts 12 integrally connected by the coupling 11 and fixed to the lower portion of the rotary shaft 12 to rotate. A base plate 13 that rotates integrally with the shaft 12, a support plate 14 that is fixed to the top of the rotating shaft 12 and rotates integrally with the rotating shaft 12, and moves up and down to the mouth 1 m of the PET bottle 1 during a leak inspection And a plurality of heads 35 to be engaged. A lower portion of the rotary shaft 12 is supported by a support frame 19 via a bearing housing 18 in which a bearing is provided. The upper part of the rotating shaft 12 is supported by a bearing (not shown) in a bearing housing 20 fixed to the support plate 14.

  The base plate 13 is provided with a container table 15 on which the plastic bottle 1 is placed. A plurality of guide bars 28 are erected on the support plate 14, and these guide bars 28 are arranged at predetermined intervals on a predetermined circumference. A slide member 30 having a cam follower 29 is attached to each guide bar 28 so as to be movable up and down. A head 35 is fixed to each slide member 30, and the head 35 and the slide member 30 move up and down integrally.

  A hollow fixed shaft 21 is inserted and supported in the bearing housing 20, and a fixed plate 32 is fixed to the fixed shaft 21. A cylindrical cam 34 is fixed to the fixed plate 32 via a support 33. The upper end surface of the cylindrical cam 34 is formed with a height difference over the entire circumference, and forms a cam profile in the circumferential direction. Accordingly, when the support plate 14 rotates with the rotation of the main rotor 4, the cam follower 29 of each slide member 30 moves up and down following the cam contour of the cam 34, whereby the slide member 30 and the head 35 are moved to the guide bar. It moves up and down along 28.

  FIG. 3 is a diagram showing the detailed structure of the head 35, the configuration of peripheral devices of the head 35, and the configuration of the container base 15. A plurality of heads 35 (36 in this embodiment) are arranged on a predetermined circumference of the main rotor 4, and the heads 35 are container holders that engage with the mouth 1 m of the plastic bottle 1 and press the mouth 1 m. It constitutes the head. Each head 35 includes a support bar 36 fixed to the slide member 30, a head main body 37 fixed to the lower end of the support bar 36, a packing 38 that is adhered to the lower end surface of the head main body 37 and constitutes a seal member, A substantially hemispherical nozzle 39 protruding downward from the head body 37 is provided. A plurality (36 in this embodiment) of container bases 15 installed on the base plate 13 (see FIG. 2) are arranged on the predetermined circumference of the main rotor 4 corresponding to the heads 35. The container base 15 is fixed to the elevating shaft 16 and can be moved up and down with respect to the base plate 13. That is, the height of the container base 15 can be adjusted according to the capacity of the PET bottle by raising and lowering the lifting shaft 16. In the example shown in FIG. 3, the position of the container base 15 in the case of a PET bottle with a capacity of 1000 ml is indicated by a solid line, and the position of the container base 15 in the case of a PET bottle with a capacity of 500 ml is indicated by a two-dot chain line. By adjusting the height of the container table 15, the top surface of the mouth 1m of the plastic bottle 1 placed on the container table 15 becomes a constant height regardless of the bottle capacity.

  As shown in FIG. 3, an opening 39 a for ejecting compressed air into the plastic bottle 1 is formed in the nozzle 39, and the opening 39 a includes a communication path 39 b formed in the nozzle 39 and a head body 37. The air supply tube 41 communicates with a communication passage 37a formed therein.

FIGS. 4A and 4B are schematic views showing the configuration of two appearance inspection stations S1 and S2 arranged along the circular path of the inspection main rotor 4, and FIG. 4A is a plan view. 4 (b) is a view taken along the line IV-IV in FIG. 4 (a). 4 (a) and 4 (b), the case where the PET bottle 1 transported along the circular path Cp is at the imaging position of the inspection stations S1 and S2 will be described.
As shown in FIGS. 4 (a) and 4 (b), the inspection station S1 includes one illumination LED 1 disposed on the radially outer side of the circular track and four cameras disposed on the radially inner side of the circular track. CAM1-a, CAM1-b, CAM2-a, and CAM2-b are arranged. One illumination LED 1 and four cameras CAM1-a, CAM1-b, CAM2-a, and CAM2-b are arranged on the side of the PET bottle 1 that is conveyed in an upright state, and the cameras CAM1-a and CAM1-b. Are arranged at the same position on the plane and slightly separated in the vertical direction, and the cameras CAM2-a and CAM2-b are arranged at the same position on the plane and slightly separated in the vertical direction. The illumination LED 1 is disposed so as to face the four cameras CAM1-a, CAM1-b, CAM2-a, and CAM2-b with the PET bottle 1 interposed therebetween. Moreover, illumination LED1 is arrange | positioned in parallel with the tangent direction of circular track | orbit Cp. The camera CAM1-a (CAM1-b) and the camera CAM2-a (CAM2-b) are connected to the plastic bottle 1 with respect to the optical axis of the camera CAM1-a (CAM1-b) and the camera CAM2-a (CAM2-b). Is disposed at a position where an angle θ1 formed by the optical axis of the first and second optical axes is approximately 60 ° to 70 °. Since PET bottles are transported in a circular orbit, the field of view of the camera can be secured even when the angle θ1 is approximately 60 ° to 70 °, and it is possible to inspect half or more than half of the body of the PET bottle. .

The inspection station S2 includes one illumination LED 2 arranged radially inside the circular track and four cameras CAM3-a, CAM3-b, CAM4-a, arranged radially outside the circular track. CAM4-b is arranged. One illumination LED 2 and four cameras CAM3-a, CAM3-b, CAM4-a, and CAM4-b are arranged on the side of the PET bottle 1 that is conveyed in an upright state, and the cameras CAM3-a and CAM3-b. Are arranged at the same position on the plane and slightly separated in the vertical direction, and the cameras CAM4-a and CAM4-b are arranged at the same position on the plane and slightly separated in the vertical direction. The illumination LED 2 is disposed so as to face the four cameras CAM3-a, CAM3-b, CAM4-a, and CAM4-b with the PET bottle 1 interposed therebetween. Moreover, illumination LED2 is arrange | positioned in parallel with the tangent direction of circular track | orbit Cp. The camera CAM3-a (CAM3-b) and the camera CAM4-a (CAM4-b) are connected to the plastic bottle 1 with respect to the optical axis of the camera CAM3-a (CAM3-b) and the camera CAM4-a (CAM4-b). Is disposed at a position where the angle θ2 formed by the optical axis of the first and second optical axes is approximately 60 ° to 90 °. Since PET bottles are transported in a circular path, the field of view of the camera can be secured even if the angle θ2 is approximately 60 ° to 90 °, and the remaining half or more than half of the body of the PET bottle can be inspected. It is.
Each illumination LED1 and LED2 is comprised from red LED illumination or white LED illumination. Each of the cameras CAM1-a to CAM4-b is composed of a CCD camera.

  As shown in FIGS. 4A and 4B, one illumination LED 1 and four cameras CAM1-a, CAM1-b, CAM2- are provided so as to surround the PET bottle 1 at the imaging position in the inspection station S1. a, CAM2-b is installed, the plastic bottle 1 is illuminated by one illumination, and the light transmitted through the plastic bottle 1 is imaged by four cameras, so that Appearance inspection of half or more than half can be performed. Then, one illumination LED 2 and four cameras CAM3-a, CAM3-b, CAM4-a, and CAM4-b are installed so as to surround the PET bottle 1 at the imaging position in the inspection station S2. By illuminating the plastic bottle 1 with the illumination and imaging the transmitted light from the plastic bottle 1 with the four cameras, the remaining half or more than half of the outer circumference of the trunk and the side of the mouth side of the plastic bottle 1 is inspected. Can do. When the PET bottle 1 passes through the two inspection stations S1 and S2, the appearance inspection of the entire circumference of the trunk and the entire side of the mouth side surface of the PET bottle 1 becomes possible.

4 (a) and 4 (b), two upper and lower cameras are arranged at four positions so that the entire circumference of the body of the plastic bottle and the entire circumference of the mouth side surface can be photographed. Even if they are not arranged one by one, for example, by arranging one camera with a wide angle of view, it is possible to image the transmitted light from the mouth side surface of the plastic bottle to the lower part of the trunk.
As described above, the appearance inspection station S1 may be divided into two appearance inspection stations, and the entire circumference of the body portion and the entire mouth side surface of the PET bottle may be individually photographed.

Next, the operation of the PET bottle leak inspection and appearance inspection apparatus configured as shown in FIGS. 1 to 4 will be described with reference to FIG.
The PET bottle 1 is carried into the inspection apparatus by the air flow conveyor AFC 1, and after a fixed interval is formed between adjacent PET bottles by the inlet screw 2, the PET bottle 1 is transferred to the inlet star wheel 3. When the PET bottle 1 is transferred from the inlet star wheel 3 to the inspection main rotor 4, the support plate 14 rotates with the rotation of the main rotor 4, and due to the cam contour of the cylindrical cam 34 and the action of the cam follower 29, The head 35 is lowered, and the head main body 37 of the head 35 comes into contact with the mouth 1m of the plastic bottle 1. At this time, since the packing 38 is provided on the lower end surface of the head main body 37, the packing 38 is in close contact with the top surface of the mouth 1m of the plastic bottle 1 and seals the mouth 1m of the plastic bottle 1. it can.

  When the seal between the packing 38 provided on the lower end surface of the head 35 and the opening 1m of the plastic bottle 1 is completed, the communication path in the rotary shaft 12, the manifold 43, the electromagnetic valve V, and the air supply from the compressed air source 44 This is supplied to the nozzle 39 via the communication tube 37 a in the tube 41 and the head 35. At this time, since the compressed air supplied from the manifold 43 to the nozzle 39 is cleaned by the HEPA filter 47, the compressed air has a high cleanliness. In this way, a predetermined amount of clean compressed air is supplied from the nozzle 39 into the PET bottle 1, and the PET bottle 1 is filled with clean compressed air.

  In this state, the plastic bottle 1 is transported along the circular path Cp of the main rotor 4 and when it reaches the imaging position of the appearance inspection station S1 shown in FIG. The transmitted light from the PET bottle 1 is imaged by the four cameras CAM1-a, CAM1-b, CAM2-a, and CAM2-b. Then, the obtained image is processed by an image processing device (not shown), thereby performing an appearance inspection of the body part and the mouth side surface of the PET bottle 1 over a half circumference or a half circumference or more. After the inspection is completed at the appearance inspection station S1, the appearance inspection is performed at the remaining half or more than half of the body and mouth side of the PET bottle 1 at the appearance inspection station S2. When the inspection at the appearance inspection station S <b> 2 is completed, since the predetermined time has elapsed since the compressed air was filled in the PET bottle 1, the pressure in the PET bottle 1 is measured by the pressure sensor 46. If the pressure in the PET bottle after the lapse of the predetermined time is the same as the initial pressure, it is determined that there is no leak from the PET bottle and there is no defect such as a pinhole in the PET bottle 1. After this determination, the head 35 is raised and separated from the mouth 1m of the plastic bottle 1, and the leak inspection is finished. In this manner, the PET bottle 1 that has been subjected to the leak inspection and the appearance inspection is transferred from the inspection main rotor 4 to the outlet star wheel 5, and the normal PET bottle 1 is transferred to the next process by the outlet star wheel 5. On the other hand, the plastic bottle 1 determined to be defective is unsupported by the outlet star wheel 5 at the position of the defective product discharge chute 50 and discharged to the defective product discharge chute 50.

  In recent years, the mainstream of soft drink containers has shifted from bottles and cans to plastic bottles. The number of filling lines for implant molding has increased, and inspection after blow molding has become more important. In the inspection of a plastic bottle before filling a beverage, an appearance inspection and a leak inspection such as a pinhole are indispensable. Conventionally, the appearance inspection and the leak inspection have been performed by separate main rotors. According to the PET bottle leak inspection and appearance inspection apparatus shown in FIGS. 1 to 4, it is possible to perform the appearance inspection and the pinhole leak inspection in the PET bottle inspection before beverage filling with one main rotor. .

  Although the embodiment of the present invention has been described so far, the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention may be implemented in various different forms within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 PET bottle 1m mouth part 2 Inlet screw 3 Inlet star wheel 4 Inspection main rotor 5 Outlet star wheel 11 Coupling 12 Rotating shaft 13 Base plate 14 Support plate 15 Container stand 16 Lifting shaft 17 Fixing lever 18 Bearing housing 19 Instruction frame 20 Bearing housing 28 Guide bar 29 Cam follower 30 Slide member 32 Fixed plate 33 Support 34 Cylindrical cam 35 Head 36 Support rod 37 Head body 37a Communication path 38 Packing 39 Nozzle 39a Opening 39b Communication path 41 Air supply tube 50 Defective product discharge chute AFC1, AFC2 Airflow conveyor CAM1-a, CAM1-b, CAM2-a, CAM2-b, CAM3-a, CAM3-b, CAM4-a, CAM4-b Camera Cp circular orbit LED1, LED2 lighting S1-S3 visual inspection station V solenoid valve

Claims (9)

A main rotor that supports a plurality of plastic bottles and conveys them along a predetermined circular path,
A plurality of container presser heads installed in the main rotor, engaged with the mouth portion of the PET bottle to seal the mouth portion, and supply gas into the PET bottle;
A plurality of inspection stations that are arranged at predetermined positions on the circular orbit of the main rotor, illuminate the PET bottles conveyed by the main rotor, and inspect the appearance of the PET bottles by photographing the transmitted light from the PET bottles;
The plurality of inspection stations include a first inspection station including one illumination disposed radially outside the circular track and at least two cameras disposed radially inside the circular track, and the circular A second inspection station comprising one illumination arranged radially inside the track and at least two cameras arranged radially outside the circular track,
A PET bottle leak inspection and appearance inspection device, wherein the first inspection station and the second inspection station can inspect the entire circumference of the body of the PET bottle.   The at least two cameras arranged in the first inspection station are located at a position approximately 60 ° to 70 ° apart from the PET bottle at the imaging position of the first inspection station with the PET bottle as a center. The PET bottle leak inspection and appearance inspection apparatus according to claim 1.   3. The PET bottle leak inspection and appearance inspection apparatus according to claim 2, wherein two cameras are arranged at each of the upper and lower positions.   The at least two cameras arranged at the second inspection station are located at a position approximately 60 ° to 90 ° apart from the PET bottle at the imaging position of the second inspection station with the PET bottle as a center. The PET bottle leak inspection and appearance inspection apparatus according to claim 1.   5. The PET bottle leak inspection and appearance inspection apparatus according to claim 4, wherein two cameras are arranged at each of the upper and lower positions.   A cam installed on the fixed portion of the main rotor and a cam follower that is connected to the container presser head and that can contact the cam are provided, and the cam follower moves while contacting the cam as the main rotor rotates. The plastic bottle leak according to any one of claims 1 to 5, wherein the container presser head is moved up and down so that the container presser head can be engaged with an opening of the plastic bottle. Inspection and visual inspection equipment.   7. The PET bottle leak inspection and appearance inspection apparatus according to claim 1, wherein the container presser head moves only up and down and does not rotate around its own axis.   8. The PET bottle leak inspection and appearance inspection according to claim 1, wherein the first inspection station and the second inspection station can photograph the entire circumference of the mouth side surface of the PET bottle. 9. apparatus.   9. The PET bottle leak inspection and appearance inspection apparatus according to claim 1, further comprising an inspection station for photographing the entire circumference of the mouth side of the PET bottle.

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