JP2008150084A - Container inspecting method and container inspecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container inspecting method and a container inspecting device capable of correctly inspecting the quality of a container. <P>SOLUTION: The container inspecting device comprises a conveying means for continuously conveying containers 14 with a metal foil end being exposed from an end face of a fin 23, a discharging electrode 17a arranged close to a top wall of the container to be conveyed, a grounding electrode 17d arranged so as to come in contact with a bottom face of the container to be conveyed, a high-voltage power source 17c for applying a high voltage between the discharging electrode 17a and the grounding electrode 17d, a detector 17b for detecting the discharging current when the discharging current is generated between both electrodes, the determining means 17b for determining acceptance/rejection of the container, and a discharging means for discharging defective containers based on the output from the determining means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an inspection method and an inspection apparatus for containers filled with beverages and the like.

In some containers filled with liquid foods such as juice and milk, a web-shaped packaging laminate material having a predetermined crease line is formed into a tube shape, and vertically sealed in the vertical line direction of the tube. A horizontal sealing zone formed by filling food in, sealing with a transverse seal in the transverse direction at predetermined intervals, cutting in the middle of the transverse sealing zone to obtain a pillow-shaped preform, and folding it along the crease line Are joined to the container top wall, the container side wall, and the container bottom to obtain a final shaped container.
An outline of an example of a paper container filling and packaging machine is shown in FIG. In the filling machine shown in this example, the paper-containing packaging material web 1 having a thermoplastic material layer in the inner and outer layers and wound into a roll is unwound, conveyed inside the filling machine by a roller, and the sealing tape 2 is transferred to the sealing tape applicator. 3 is joined to one end of the packaging material web, sterilized by passing the packaging material web through the sterilant tank 4, the sterilizing agent is removed by the air knife 5, placed in the sterilization chamber 40, and tubular by the forming roller 6. The liquid food is filled from the filling pipe 7 into the tube.

Next, both edges of the tube are vertically sealed by the longitudinal seal element 8, and the tube is sandwiched by the seal jaw 10 and the opposing jaw while being sent downward by the length corresponding to one packaging container, and is moved in the transverse direction. Two horizontal seal zones are formed by horizontal sealing, and simultaneously formed into a pillow-shaped preform 12 at the same time. It cut | disconnects by each etc. and cut | disconnects to each pillow-shaped preform 13, and the upper and lower flaps of the pillow-shaped preform which were cut | disconnected in the final shaping | molding apparatus are bend | folded, and it shape | molds in the package filling container 14 of the last form.
The packaging and filling container 14 is continuously translated and conveyed by a conveying means such as a belt conveyor, and is packed by a certain quantity through a straw applicator or the like that sticks the straw to the container wall.

A mode in which the pillow-shaped preform 13 is folded by the final molding apparatus is shown in FIG. The pillow-shaped preform 13 is sealed with a vertical seal portion 26 and two upper and lower horizontal seal zones 23, and has a side wall 22 divided by a crease line. (See Fig. 4 (A))
As shown in FIG. 4 (B), the body portion of the pillow-shaped preform is formed in a rectangular parallelepiped shape along the crease line, and fins 23 and flaps 24 of the lateral seal band are provided at the edge of the ridge side. It is formed to stand upright from the wall. The fins 23 in the lateral seal zone stand upright from the bottom surface 20 and the top surface 21, and the flap 24 communicates integrally with the container wall via the edge 25.
Next, as shown in FIG. 4 (C), the fins 23 in the lateral seal zone are folded into the bottom surface 20 (shown upside down as a container in FIG. 4) and the top surface 21, and then the flap is centered on the edge. , The container top side flap 24 is folded into the side wall 22, and the container bottom side flap 24 is folded into the bottom surface 20.
FIG. 2A shows an external perspective view of a brick-type liquid food-filled paper container. The container has folded side seal zone fins 23, flaps 24, bottom and top walls, and container sidewalls. The fins 23 are folded into the container front wall surface 22a side opposite to the vertical seal portion 26. Furthermore, the flap 24 folded in the side wall via the edge is provided.

Liquid food containers are continuously manufactured from a filling and packaging machine, and the appearance is inspected by an inspector. In addition, it is periodically extracted by machine operators and quality-inspected for various items. (For example, see Patent Document 1)
JP 2004-123184 A

However, if the containers that are continuously transported and the containers that are periodically removed are manually operated by the workers, even if they are the same worker due to individual differences among the workers, the difference will appear and the inspection results Is uncertain. Accurate test results are desired.
In the appearance inspection, when there is an inconvenience in the flap portion and the fin portion of the container, the visual inspection by the inspector is likely to be overlooked.
The present invention meets the above-described needs and desires, and an object thereof is to provide a container inspection method and a container inspection apparatus capable of accurately inspecting a container.

In the container inspection method of the present invention, the web-shaped metal foil laminated packaging material having a predetermined crease line is formed into a cylindrical shape, and both edges of the packaging material are overlapped to form an overlap. Is vertically sealed to form a vertical seal zone, food is filled in the cylindrical packaging material, the packaging material is pressed in the transverse direction at predetermined intervals, and sealed by a horizontal seal to form a horizontal seal zone. A container obtained by cutting in the middle of the seal zone to obtain a pillow-shaped preform, and joining flaps and fins formed by folding along the crease line to the container top wall, container side wall and / or container bottom Is a method of inspecting this container.
The container inspection method of the present invention is characterized in that a container with a metal foil edge exposed from the end face of the fin is continuously translated by a conveying means and conveyed so as to be close to the top wall of the container to be conveyed. A step of applying a high voltage between the discharge electrode and the ground electrode by a high voltage power source, and bonding to the top wall of the container. Detected with the discharge electrode toward the end surface of the fins, contacted with the ground electrode substantially toward the end surface of the fin joined to the bottom surface of the container, when a discharge current was generated between the two electrodes, A step of detecting the discharge current, and a step of determining whether the container is good or bad by the detected discharge current.

In a preferred aspect of the present invention, the method further includes the step of discharging the defective product from the obtained container by the discharging unit based on the output from the determining unit.

In the container inspection apparatus of the present invention, a web-shaped metal foil laminated packaging material having a predetermined crease line is formed into a cylindrical shape, and both edges of the packaging material are overlapped to form an overlap, and the overlap is a vertical line direction. Is vertically sealed to form a vertical seal zone, food is filled in the cylindrical packaging material, the packaging material is pressed in the transverse direction at predetermined intervals, and sealed by a horizontal seal to form a horizontal seal zone. A container obtained by cutting in the middle of the seal zone to obtain a pillow-shaped preform, and joining flaps and fins formed by folding along the crease line to the container top wall, container side wall and / or container bottom This is an inspection device.
The container inspection apparatus of the present invention is characterized in that it is disposed so as to be close to the top wall of the container to be transported, and the transport means for continuously translating the container with the metal foil end exposed from the end surface of the fin. A discharge electrode, a ground electrode arranged so as to be in contact with the bottom surface of the container to be transported, a high voltage power source for applying a high voltage between the discharge electrode and the ground electrode, and a top wall of the container. Detected with the discharge electrode toward the end surface of the fin, and substantially contacted with the ground electrode toward the end surface of the fin joined to the bottom of the container, and when the discharge current is generated between the two electrodes, the discharge current is detected And a detector that determines the quality of the container based on the detected discharge current, and a discharge unit that discharges a defective product from the container based on an output from the determination unit.

In the container inspection according to the present invention, the following containers are inspected.
A container to be inspected according to the present invention is formed by forming a web-shaped metal foil laminated packaging material having a crease line into a cylindrical shape, overlapping both edges of the packaging material to form an overlap, and the overlap in the vertical line direction. Seal to form a vertical seal zone, fill the cylindrical packaging material with food, press the packaging material in the transverse direction at predetermined intervals, and seal with a horizontal seal to form a horizontal seal zone. A pillow-shaped preform is obtained by cutting in the middle, and flaps and fins formed by folding along a crease line are joined to the container top wall, container side wall and / or container bottom.
This container can be manufactured continuously. It is continuously translated and transported by a transport means such as a belt conveyor, and is packed in a certain quantity through a straw applicator or the like for sticking the straw to the container wall.

In the container inspection feature of the present invention, the container with the metal foil edge exposed from the end face of the fin is continuously translated by the conveying means and conveyed.
Since the metal foil is laminated, the packaging material has electrical conductivity along the laminated metal foil, and the end of the metal foil is exposed from the end face of the fin. Can exhibit electrical conductivity. Since the thermoplastic material layer is laminated on the inner and outer layers, the inner and outer surfaces of the packaging material are electrically insulating.

In the container inspection according to the present invention, the discharge electrode is disposed so as to be close to the top wall of the container to be transported, and the ground electrode is disposed so as to be in contact with the bottom surface of the container to be transported. A high voltage is applied between the working electrode and the ground electrode.
Since the fin is joined to the top wall of the container and the end of the metal foil is exposed from the end face of the fin, the discharge electrode may be close to the exposed end of the metal foil. On the other hand, the fin is also bonded to the bottom surface of the container, and the end of the metal foil is exposed from the end surface of the fin, so that the ground electrode substantially contacts the exposed end of the metal foil.
As described above, since the metal foil end exposed from the end face of the fin on the bottom surface of the container and the metal foil end exposed from the end face of the fin on the top wall of the container exhibit conductivity, the discharge electrode and the ground electrode When a high voltage is applied between the discharge electrode and the ground electrode, there is a possibility of electrical conduction, that is, discharge.

In the container inspection of the present invention, the discharge electrode is detected toward the end face of the fin joined to the top wall of the container, and is substantially in contact with the ground electrode toward the end face of the fin joined to the bottom face of the container. When a discharge current is generated in the battery, the detector detects the discharge current.
Discharge is a phenomenon in which a charged body loses charge. Here, the insulator loses its insulating property under a strong electric field, and the discharge electrode is not in contact with the end of the metal foil on the end surface of the fin. is there.
When both positive and negative electrodes are placed in a gas and the voltage between them is increased, a very weak current (dark current) flows due to a small number of electrons and ions, ionization of gas atoms due to electron collision occurs, and the electric field accelerates the collision. Electrons are knocked out by this, and this process is repeated one after another, the number of electrons increases in a spurious manner, causing an avalanche phenomenon, and a discharge current flows.
That is, in this invention, when the discharge electrode is positioned close to and opposed to the metal foil end of the fin end surface, when a high voltage is applied between the foil end and the electrode, the discharge is performed between the foil end and the electrode. A discharge current flows from the vicinity of the needle tip of the discharge electrode during the interval.

In the container inspection of the present invention, the quality of the container is determined by the determining means based on the detected discharge current.
Depending on the external shape and state of the fins joined to the top wall of the container, a discharge occurs and a discharge current flows or the amount of discharge current fluctuates with time.
Based on the detected discharge current, it is possible to determine the quality of the bonding state and sealing state of the fins of the container.

In the container inspection apparatus of the present invention, the defective product is discharged from the obtained container by the discharge means based on the output from the determination means.
Inspecting continuously transported containers and regularly extracted containers and automatically discharging defective products with the equipment, so there is no need for manual work by workers, there are no individual differences or differences among workers, Accurate inspection results are possible.
With this container inspection device, it is possible to accurately inspect the container.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a conceptual diagram for explaining the operation of the container inspection apparatus example of the present invention. FIG. 2 is an external view of a container example to be inspected by the container inspection apparatus of the present invention. FIG. 3 is a pattern diagram of the discharge current according to the container inspection apparatus example of the present invention. FIG. 4 is a perspective view showing a molding process of a container example to be inspected by the container inspection apparatus of the present invention. FIG. 5 is a schematic perspective view of a packaging and filling apparatus including a container inspection apparatus according to an embodiment.

As shown in FIG. 5, the web-like band-shaped packaging laminate material 1 is accommodated in a packaging filling device in a reel state. The packaging laminate material 1 is composed of a paper substrate and a flexible laminate in which polyethylene resin is laminated on both sides of the paper substrate, and a metal foil layer of aluminum foil is formed between the paper substrate and the film. Then, exterior printing is performed in advance on a portion corresponding to the surface of the packaging container 14.

The fed packaging laminate material 1 is continuously conveyed by a feeding device as a conveying means, is sent to a sealing tape adhering device 3 through a bending roller, a damper roller, and the like, and is wrapped by the sealing tape adhering device. The sealing tape 2 is stuck along one edge of the.
When the sealing tape 2 is joined to the edge of the belt-shaped packaging laminate material 1, the pressure roller is arranged and pressed on one side with the belt-shaped packaging laminate material and the sealing tape 2 being sandwiched, and the pressure by the pressure roller is applied to the other side. The counter roller is disposed so as to be opposed to and pressed and supported.
As the packaging laminate material is conveyed, the pressure roller and the counter roller are pressed and rotated with the packaging laminate material and the sealing tape sandwiched therebetween, and the mating surfaces of the vertical seal portions are sealed and bonded.

Subsequently, the pulling tab of the packaging laminate material 1 is stuck by a pull tab sticking device as necessary. The packaging laminated material 1 is sent to the sterilization tank 4 and sterilized with a sterilization liquid such as hydrogen peroxide in the sterilization tank 4. The packaging laminate material 1 is sent to the air knife 5, dried by the air knife 5, and then sent to the sterilization chamber 40. Then, the packaging laminate material 1 is gradually deformed by the upper molding ring 6 and other molding rings into a cylindrical shape (cylindrical shape). The packaging laminate material 1 is sealed in the longitudinal direction by the longitudinal sealing device 8, and the flowable food supplied via the filling pipe 7 is filled into the packaging laminate material 1.

When both ends of the packaging laminate material formed into a cylindrical shape are pressed together with a sealing tape by a longitudinal seal device and vertically sealed, sandwiching one edge and the other edge of the strip packaging laminate material, On one side, a pressure roller is rotatably arranged and pressed, and on the other side, a counter roller is rotatably arranged to receive pressure from the pressure roller so as to oppose and support the pressure roller. The face is sealed and glued.

The cylindrical packaging laminated material is guided by a roller, sent to the horizontal sealing device 10, sandwiched and sealed in the horizontal direction, and the laterally sealed packaging laminated material 12 is cut with a knife or the like to be a pillow-shaped preform. 13 is formed.
As shown in FIG. 4 (A), the pillow-shaped preform 13 is sealed with fins 23 in the lateral seal zone and has side walls 22 that are divided by crease lines. Next, as shown in FIG. 4 (B), along the crease line, the main body portion of the pillow-shaped preform is formed into a rectangular parallelepiped shape. Is formed upright from the vessel wall. Finally, as shown in FIG. 4 (C), after the fins 23 of the lateral seal zone are folded into the bottom surface 20 and the top surface 21, the container top side flap 24 is on the side wall 22 and the container bottom side flap 24 is The bottom surface 20 is folded.
The pillow-shaped preform 13 is formed into a final shape by a final forming apparatus, and a packaging container 14 for containing a fluid food is completed.

The example of the packaging and filling apparatus shown in FIG. 5 includes a container inspection apparatus.
Containers continuously manufactured from the packaging and filling apparatus are inspected by the determination means 17 of the container inspection apparatus, and the defective containers are discharged from the production line by the discharge means 18 based on the output from the determination means 17.

In FIG. 1, the conceptual diagram explaining operation | movement of the container inspection apparatus example of this invention is shown. FIG. 2 shows an external view of a container example to be inspected by this container inspection apparatus example. FIG. 3 is a pattern diagram (time chart) of the discharge current according to this inspection apparatus example.
FIG. 2A shows a normal brick-type liquid food-filled paper container. The container includes the fins 23 and the container walls of the folded horizontal seal zone, and the fins 23 are folded to the container front wall surface 22 a side opposite to the vertical seal portion 26. Furthermore, the flap 24 folded through the edge is provided.
FIG. 2B shows an example of a defective container. In the container, the flap 24 a is folded into the side wall, but the fin 23 a is folded into the same side as the vertical seal portion 26. The vertical seal portion may overlap, causing a large stress on the container wall to cause leakage, and the vertical seal portion is bulky, and the container appearance / shape is unsatisfactory.
FIG. 2C shows an example of a second defective container. In the container, the flap 24 is folded in the normal direction on one side wall, while the flap 24a on the other side wall is folded in the opposite direction. The fins 23 appear to be twisted at the container top 21, and particularly stand up near the vertical seal portion 26.

The container inspection apparatus example shown in FIGS. 1 and 5 includes a conveying means 19 that continuously translates and conveys the container 14 with the metal foil end 23c exposed from the end face of the fin 23, and the top wall of the container 14 to be conveyed. A high frequency / high voltage between the discharge electrode 17a disposed so as to be close to the ground, the ground electrode 17d disposed so as to be in contact with the bottom surface of the container to be transported, and the discharge electrode 17a and the ground electrode 17d. Is detected by the discharge electrode 17c toward the end surface of the fin 23 bonded to the top wall of the container and the ground electrode 17d toward the end surface of the fin 23 bonded to the bottom surface of the container. Based on the detector 17b for detecting the discharge current when the discharge current is generated substantially between the two electrodes, the determination means 17b for determining the quality of the container based on the detected discharge current, and the output from the determination means. The From the container line, comprising a discharge means 18 for discharging the defective product, the.

The container inspection apparatus example includes a high-frequency / high-voltage power source 17c and applies a high-frequency / high voltage of, for example, 5 to 15 kV. Further, a DC high-voltage power supply that applies an appropriate DC high voltage between 0.6 KV and 30 KV, for example, corresponding to the thickness and material of the test container can be used.

In the example of the container inspection apparatus shown in FIG. 1, the container 14 is transported by a transport means (not shown) from the back to the front on the surface of the drawing. In a preferred embodiment, the ground electrode 17d can also be used as a conductive (for example, metal) belt conveyor. The belt conveyor of the zone where the example of the container inspection apparatus is installed is made of metal.

The operation of the inspection apparatus example of the container example shown in FIG. 1 (A) is to inspect a normal container (FIG. 2 (A)) in which the fins 23 are folded into the container front wall surface 22a side opposite to the vertical seal portion 26. Is an operation function.
The container 14 is conveyed vertically from the back to the front on the surface of the drawing.
Since the aluminum foil is laminated, the packaging material has electrical conductivity along the foil, and since the aluminum end is exposed from the end face 23c of the fins 23, 23, it is exposed from the end faces of the fins 23, 23. Between the aluminum foil ends shows conductivity.

In the container inspection example shown in FIG. 1A, since the end of the aluminum foil is exposed from the end face 23c of the fin 23 on the top wall, the discharge electrode 17a may be close to the exposed end of the aluminum foil. On the other hand, since the end of the aluminum foil is exposed from the end face of the fin 23 on the bottom surface, the ground electrode 17d substantially contacts the exposed end of the aluminum foil.
When a high frequency / high voltage is applied between the discharge electrode 17a and the ground electrode 17d, there is a possibility of electrical conduction between the discharge electrode and the ground electrode, that is, discharge.
In the container inspection example shown in FIG. 1 (A), however, the discharge electrode 17a is positioned so as not to be close to or opposed to the end of the aluminum foil on the end face of the fin 23, so that the gap between the end of the aluminum foil 23c and the electrode 17a is not. Even when a high frequency / high voltage is applied, the discharge current does not flow from the tip of the discharge electrode between the foil end and the electrode.

FIG. 3A shows a pattern diagram (time chart) of the discharge current according to the container inspection example shown in FIG.
At time t1, the tip of the container 14 passes the position of the discharge electrode 17a, and the discharge electrode 17a starts scanning the container top wall. At time t2, the rear end of the container 14 passes the position of the discharge electrode 17a, and the discharge electrode 17a finishes scanning the container top wall.
In the container inspection example shown in FIG. 1A, since the discharge current does not flow from the tip of the discharge electrode between the foil end and the electrode, the pattern of the discharge current remains off.

The operation of the inspection apparatus example of the container example shown in FIG. 1B is an operation function when inspecting a defective container (FIG. 2B) in which the fins 23a are folded into the vertical seal portion 26 side.
The container 14 is conveyed vertically from the back to the front on the surface of the drawing. The space between the aluminum foil ends exposed from the end surfaces of the container top wall fins 23 and the container bottom fins 23 exhibits electrical conductivity.

In the container inspection example shown in FIG. 1B, since the end of the aluminum foil is exposed from the end face 23c of the fin 23a on the top wall, the discharge electrode 17a is very close to the exposed end of the aluminum foil. On the other hand, since the end of the aluminum foil is exposed from the end face of the fin 23 on the bottom surface, the ground electrode 17d substantially contacts the exposed end of the aluminum foil.
When a high frequency / high voltage is applied between the discharge electrode 17a and the ground electrode 17d by the high frequency / high voltage power source 17c, the discharge electrode and the ground electrode are electrically connected, that is, discharged.
In the container inspection example shown in FIG. 1B, the discharge electrode 17a is positioned close to and opposed to the end of the aluminum foil on the end surface of the fin 23c, so that the discharge electrode is disposed between the end of the aluminum foil 23c and the electrode 17a. Discharge current flows from the tip of the.

FIG. 3B shows a pattern diagram (time chart) of the discharge current according to the container inspection example shown in FIG.
At time t1, the tip of the container 14 passes the position of the discharge electrode 17a, and the discharge electrode 17a starts scanning the container top wall. At that time, since the discharge current flows from the tip of the discharge electrode between the aluminum foil end 23c and the electrode 17a, the pattern is turned on. At time t2, the rear end of the container 14 passes the position of the discharge electrode 17a, and the discharge electrode 17a finishes scanning the container top wall. At that time, the aluminum foil end 23c and the electrode 17a are separated from each other, the discharge is stopped, and the discharge current does not flow, so the pattern is turned off.

The operation of the inspection apparatus example of the container example shown in FIG. 1C is an operation function when inspecting a defective container (FIG. 2C) in which the fins 23b rise at the vertical seal portion 26 on the top wall.
The container 14 is conveyed vertically from the back to the front on the surface of the drawing. The space between the ends of the aluminum foil exposed from the end faces of the container top wall fins 23b and the container bottom fins 23 exhibits conductivity.

In the container inspection example shown in FIG. 1C, since the end of the aluminum foil is exposed from the end face 23b of the fin 23 on the top wall, the discharge electrode 17a is very close to the exposed end of the aluminum foil. On the other hand, since the end of the aluminum foil is exposed from the end face of the fin 23 on the bottom surface, the ground electrode 17d substantially contacts the exposed end of the aluminum foil.
When a high frequency / high voltage is applied between the discharge electrode 17a and the ground electrode 17d by the high frequency / high voltage power source 17c, the discharge electrode and the ground electrode are electrically connected, that is, discharged.
In the container inspection example shown in FIG. 1 (C), the discharge electrode 17a is located close to and opposed to the end of the aluminum foil on the end surface of the fin 23c, so that the discharge electrode is disposed between the end of the aluminum foil 23b and the electrode 17a. Discharge current flows from the tip of the.

FIG. 3 (C1) and FIG. 3 (C2) show discharge current pattern diagrams (time charts) according to the container inspection example shown in FIG.
At time t1, the tip of the container 14 passes the position of the discharge electrode 17a, and the discharge electrode 17a starts scanning the container top wall. In the container, the flap is folded in the normal direction on one side wall, and the flap on the other side wall is folded in the opposite direction, so that the fins 23 stand up in the vicinity of the vertical seal portion 26 on the top wall of the container. When one is normal and the other is defective, initially, the discharge current does not flow from the tip of the discharge electrode between the end of the aluminum foil and the electrode 17a, so the pattern is turned off. In the vicinity of the vertical seal portion 26 on the top wall of the container, the discharge current flows from the tip of the discharge electrode between the end of the aluminum foil on the fin end surface and the electrode 17a, so the pattern is turned on. At time t2, the rear end of the container 14 passes the position of the discharge electrode 17a, and the discharge electrode 17a finishes scanning the container top wall. At that time, the aluminum foil end 23c and the electrode 17a are separated from each other, the discharge is stopped, and the discharge current does not flow, so the pattern is turned off. (Reference, Fig. 3 (C1))
When one is defective and the other is normal, the pattern is turned on because a discharge current flows from the tip of the discharge electrode between the end of the aluminum foil and the electrode 17a. Since the distance between the fin end face aluminum foil edge and the discharge electrode tip 17a is away from the vertical seal portion 26 on the top wall of the container, the discharge stops and the discharge current does not flow, so the pattern is turned off. At time t2, the rear end of the container 14 passes the position of the discharge electrode 17a, and the discharge electrode 17a finishes scanning the container top wall. The pattern remains off. (Reference, Fig. 3 (C2))

In this embodiment, the discharge current is detected by the detector 17b. A detector 17b including a detection circuit is integrated with the determination unit 17b. The determination means 17b compares the detected discharge current pattern with the recorded container quality pattern to determine the quality of the container. Based on the detected discharge current, it is possible to determine the quality of the bonding state and sealing state of the fins of the container.
In this example of the container inspection apparatus, the defective product is discharged by the discharge means 18 from the line of the manufactured container, as shown in FIG. 5, based on the output from the determination means 17b.
Inspecting continuously transported containers and regularly extracted containers and automatically discharging defective products with the equipment, so there is no need for manual work by workers, there are no individual differences or differences among workers, Accurate inspection results are possible.

As demonstrated above, the container inspection apparatus and method of the present invention can accurately inspect a container.

In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

By the method / apparatus of the present invention, packaging containers such as beverages such as milk, juice, mineral water, and liquid foods can be produced.

It is a conceptual diagram explaining operation | movement of the container inspection apparatus example of this invention. It is an external view of the container example of the object which the container inspection apparatus of this invention inspects. It is a pattern figure of the discharge current by the container inspection apparatus example of this invention. It is a perspective view which shows the formation process of the container example of the object test | inspected with the container inspection apparatus of this invention. It is a schematic perspective view of the packaging filling apparatus provided with the container inspection apparatus of one Example.

Explanation of symbols

14 Container 17a Discharge electrode 17b Detector / determination means 17c High voltage power source 17d Ground electrode 23 Fin

Claims (3)

A web-like metal foil laminated packaging material having a predetermined crease line is formed into a cylindrical shape, and both edges of the packaging material are overlapped to form an overlap. The overlap is vertically sealed in the vertical line direction. A sealing zone is formed, the cylindrical packaging material is filled with food, the packaging material is pressed in the transverse direction at predetermined intervals, and sealed by a transverse seal to form a transverse sealing zone. A container obtained by cutting to obtain a pillow-shaped preform, and joining flaps and fins formed by folding along the crease line to the container top wall, container side wall and / or container bottom, A method for inspecting a container,
Transporting the container with the metal foil end exposed from the end face of the fin by continuously translating it with a transport means;
Discharging electrodes are disposed so as to be close to the top wall of the container to be transported, ground electrodes are disposed so as to be in contact with the bottom surface of the transported container, and the discharging electrode and the ground electrode are provided by a high voltage power source. Applying a high voltage between,
Detection is made with a discharge electrode toward the end face of the fin joined to the top wall of the container, and is substantially contacted with an earth electrode toward the end face of the fin joined to the bottom face of the container. Detecting the discharge current by a detector when it occurs,
A step of determining whether the container is good or bad by the detected discharge current;
Container inspection method. The container inspection method according to claim 1, further comprising a step of discharging a defective product from the container by a discharge unit based on an output from the determination unit. A web-like metal foil laminated packaging material having a predetermined crease line is formed into a cylindrical shape, and both edges of the packaging material are overlapped to form an overlap. The overlap is vertically sealed in the vertical line direction. A sealing zone is formed, the cylindrical packaging material is filled with food, the packaging material is pressed in the transverse direction at predetermined intervals, and sealed by a transverse seal to form a transverse sealing zone. An inspection apparatus for a container obtained by cutting and obtaining a pillow-shaped preform and joining flaps and fins formed by folding along the crease line to the container top wall, container side wall and / or container bottom Because
Conveying means for continuously translating and conveying the container in which the end of the metal foil is exposed from the end surface of the fin;
A discharge electrode disposed so as to be close to the top wall of the container to be conveyed;
A ground electrode arranged to contact the bottom surface of the container to be transported;
A high voltage power supply for applying a high voltage between the discharge electrode and the ground electrode;
Detection is made with a discharge electrode toward the end face of the fin joined to the top wall of the container, and is substantially contacted with an earth electrode toward the end face of the fin joined to the bottom face of the container. A detector that detects the discharge current when it occurs,
Determining means for determining the quality of the container based on the detected discharge current;
Based on the output from the determination means, discharge means for discharging defective products from the container;
Including container inspection equipment.