JP2009029464A - Seal check apparatus and seal check method for package - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional dominant package seal check method is used for a package having a content sealed in a bag with air, and when an external pressure is applied to a bag to measure the physical displacement of the bag, a weak sealed part breaks up by compression. <P>SOLUTION: This package seal check apparatus includes a check chamber 1 maintaining a sealed condition and storing a package 8 with air so as to be freely taken in and out, a pressure reducing device 3 for reducing the pressure in the check chamber 1, a detector 4 for detecting the expansion degree of the bag 82 of the package 8 in the check chamber 1 and a controller 7 for determining whether the sealed condition of the bag 82 is acceptable or not based upon the detected value by the detector 4. By determining the sealed condition of the bag under reduced pressure, seal check is allowed without adverse effect on the bag. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seal inspection apparatus and seal inspection method for a package in which contents are hermetically packaged together with air in a bag.

  There are various contents such as bread, confectionery, and noodles that are sealed and packaged with air in the bag. These pneumatic packages have a function to prevent pressure or impact from the outside of the bag from directly affecting the contents due to the enclosed air (function to prevent the contents from being damaged or deformed). is doing.

  By the way, this type of pneumatic package seals the bag opening with the contents and air in the bag (in many cases, heat seal), but the seal is not perfect or the bag is very small. If there are holes (pinholes or minute tears), the air in the bag is gradually released after manufacturing, and there is no “tension” of the bag, and the function of protecting the contents by the enclosed air is reduced.

  Therefore, with this type of pneumatic package, it is necessary to perform a bag seal inspection at the time of manufacture completion. Generally, a pneumatic package is subjected to physical displacement by applying external pressure to the bag. The thing that measures is mainstream. In this case, if the bag has a poor seal, when the external pressure is applied, the air in the bag is released from the poorly sealed portion, the bag becomes thin, and the bag will not be restored after the external pressure is released. I understand that there is.

  However, when applying external pressure to the bag in the seal inspection of a pneumatic package, if there is a portion with weak seal strength, there is a risk that the portion with low seal strength may peel off due to an increase in internal pressure due to compression. There was a problem that even though there was, it would be a defective product.

  Therefore, the present invention provides a seal inspection apparatus and a seal inspection method for a package that can perform a seal inspection of a pneumatic package safely and reliably without adversely affecting the package.

  The present invention has the following configuration as means for solving the above problems.

[Invention of Claim 1 of the Present Application]
The invention of claim 1 of the present application is directed to a seal inspection apparatus for a package in which contents are hermetically packaged together with air in a bag. In addition, as a pneumatic package, there are products such as bread, confectionery, and noodles, and the bag is a thin film and is very flexible. Moreover, in the following description, a pneumatic package may be simply expressed as a package or an object to be inspected.

  The seal inspection apparatus according to claim 1 has an inspection chamber in which the package body can be inserted and removed freely and can maintain a sealed state, a decompression device for decompressing the inspection chamber, and a degree of swelling of the bag of the package body placed in the inspection chamber. It comprises a detector for detecting, and a controller for judging the quality of the bag seal based on the detected value of the degree of bag bulge from the detector.

  The inspection room is provided with an entrance for taking in and out the object to be inspected (packaging body). The entrance is opened and closed by a lid, and the inspection room is sealed in the closed state. The entrance / exit lid is preferably one that can be opened / closed by an appropriate opening / closing device.

  The package is sequentially carried into and out of the inspection room, and a conveyor may be used for carrying in and out. In addition, when using a conveyor, in order to keep an inspection room airtight, it is good to divide | segment a conveyor in the entrance / exit part of an inspection room, and to move a package on each conveyor.

  A blower that can suck air in the examination room is used for the decompression device. This blower may keep the suction action constantly in the examination room during operation, but in that case, an open air opening that can be opened and closed is provided, and when the decompression of the inside of the examination room is released, the outside air introduction opening is opened. It is good to return the inside of the examination room to atmospheric pressure by opening it. In addition, this decompression device should just be what can depressurize the inside of a test chamber to about 0.8 atmosphere.

  And this seal | sticker test | inspection apparatus accommodates to-be-inspected object (pneumatic package) in a test room, and if a pressure reduction device (blower) is operated in the state which sealed the test room, the air in a test room will be excluded ( The bag of the object to be inspected (packaging body) inflates due to the pressure difference between the inside and outside of the bag, and when the pressure inside the inspection chamber is released, the inspection chamber returns to atmospheric pressure (1 atm) and the bag returns to its original state. To do. Note that the inspection object is placed on a platform in the inspection room, and therefore when the pressure in the inspection room is reduced, the bag of the inspection object swells to the upper surface side (the height of the upper surface of the bag increases).

  A distance sensor using ultrasonic waves, infrared rays, or the like can be used as a detector for detecting the degree of bag expansion. This detector (distance sensor) is installed at a position directly above the package placed at a fixed position in the examination room, and detects the distance (the degree of swelling of the bag) to the upper surface of the bag of the package. Yes. The detection signal from this detector is output to the controller every moment.

  The controller receives a detection signal (distance data) from the detector and determines whether the degree of bag bulging when the inside of the examination room is in a reduced pressure state is normal (seal normal) or not (seal failure). Specifically, distance data from a detector in a decompressed state in a package with a normal seal is input (stored) in the controller in advance, and distance data of the normal seal package previously input by the controller. And the distance data (bag bulge degree) of the package to be inspected, if the distance data of the package to be inspected is less than the allowable value (the distance data value decreases as the degree of bag bulge increases) A seal is regarded as a normal product, and if it exceeds the allowable value, it is regarded as a defective seal. When the controller considers a defective seal, the notification means (for example, a buzzer or a warning light) notifies the controller, or if the controller is inspected on an automated line as in the embodiments to be described later, it is a defective seal. Can be excluded from the regular line.

  The seal inspection apparatus according to claim 1 of the present application functions as follows. That is, when the object to be inspected (pneumatic package) is placed at a predetermined position in the inspection room (a position directly below the detector on the mounting table) and the decompression device is operated in a state where the inspection room is sealed, the inspection room is predetermined. The pressure is reduced to atmospheric pressure (for example, 0.8 atmospheric pressure), and the bag inflates to the upper surface side due to the pressure difference between the inside and outside of the bag because the inside of the bag of the object to be inspected is 1 atmosphere (the object to be inspected is placed on the mounting table). Because it is placed, it does not swell on the bottom side of the bag). Then, the height of the bag bulge at that time is detected by a detector (distance sensor), the detected distance data is output to the controller, and the distance data value input by the controller is a normal value (normal seal product). Judgment is made (No seal defective) Note that the object to be inspected (packaging body) determined to have a poor seal is either discarded from the regular line and discarded or returned to the packaging process and repackaged.

[Invention of claim 2 of the present application]
The invention of claim 2 of the present application is directed to a method for inspecting a sealed state of a package in which contents are hermetically packaged in a bag together with air.

  In the seal inspection method according to claim 2, the pneumatic package is placed in a sealed inspection chamber, the pressure in the inspection chamber is reduced to inflate the bag of the package, and the degree of expansion of the bag at that time On the basis of this, the quality of the seal of the bag is judged.

  The seal inspection method according to claim 2 is performed using the inspection chamber and the decompression device of the seal inspection device according to claim 1. However, in the seal inspection method according to claim 2, the degree of bag bulge in the decompressed state is measured. The detection (determining whether the bag seal is good or bad) may be performed using the detector and controller of claim 1 above, or visually confirmed without using the detector or controller. You may go on.

[Invention of claim 3 of the present application]
The invention according to claim 3 of the present application is the seal inspection apparatus according to claim 2, wherein the inside of the inspection chamber is repeatedly changed between a reduced pressure state and an atmospheric pressure state, based on the degree of swelling of the bag at the time of the final pressure reduction. The seal is judged as being good or bad.

  By the way, when the bag of the object to be inspected has a very small portion of poor sealing, even if the object to be inspected is placed in the inspection room and the pressure in the inspection room is reduced, the air in the bag is only reduced by one pressure reduction. In some cases, only a small amount is discharged, and the bag of the object to be inspected expands to a considerable size, and it is difficult to determine whether the seal is good or bad depending on the degree of expansion of the bag.

  Therefore, in the seal inspection method according to claim 3 of the present application, the depressurization in the inspection chamber and the return to the atmospheric pressure are repeated a plurality of times (for example, 3 to 5 times). Even if there is, there is a small amount of air in the bag every time the pressure is reduced, and the degree of swelling of the bag is reduced to the extent that it can be identified as a seal failure at the time of the final pressure reduction.

[Effect of the invention of claim 1 of the present application]
In the seal inspection apparatus according to claim 1 of the present application, by depressurizing the inspection chamber, the bag of the object to be inspected (packaging body) placed in the inspection chamber is inflated, and the degree of swelling of the bag is detected by a detector, The controller is configured to determine whether the seal is good or bad based on the detected value of the bag swelling degree.

  Therefore, if the seal inspection apparatus according to claim 1 of the present application is used, it is possible to determine whether the seal is good or bad without applying external pressure to the object to be inspected (packaging body), and thus adversely affect the bag of the object to be inspected (packaging body). There is an effect that the seal inspection can be performed safely and reliably without any trouble.

[Effect of the invention of claim 2 of the present application]
In the seal inspection method according to claim 2 of the present application, the inspected chamber (packaging body) is placed in the inspection chamber, and the inspection chamber is depressurized to inflate the bag of the inspected object, based on the degree of expansion of the bag at that time. The quality of the bag seal is judged.

  Therefore, in the seal inspection method according to claim 2 of the present application, as in the case of claim 1, the seal inspection can be performed safely and reliably without adversely affecting the bag of the object to be inspected (packaging body). effective.

[Effect of the invention of claim 3 of the present application]
In the invention of claim 3 of the present application, in the seal inspection method of claim 2, the inside of the inspection chamber is repeatedly changed between a reduced pressure state and an atmospheric pressure state. Even if there is a poorly sealed part, the air in the bag is discharged in small amounts at each decompression, and the degree of swelling of the bag is reduced to such an extent that it can be identified as a seal failure at the final decompression.

  Therefore, in the seal inspection method according to the third aspect, even if there is a minute seal failure portion on the bag, it can be reliably determined as a seal failure product, and the inspection accuracy can be improved.

  With reference to FIGS. 1-4, the seal | sticker test | inspection apparatus and seal | sticker test | inspection method of the package of an Example of this application are demonstrated. Note that the inspected body (packaging body) 8 to be inspected in this embodiment is the contents 81 sealed and packaged together with air in the bag 82. In the example of FIG. Such relatively soft properties are used. And this kind of pneumatic packaging body 8 comes to be able to protect the content 81 from external pressure and an impact with the air layer in a bag by sealingly packaging the content 81 in the bag 82 with air. ing.

  FIG. 1 shows a seal inspection apparatus according to an embodiment of the present invention. This seal inspection apparatus includes an inspection chamber 1 that can accommodate a pneumatic packaging body (inspected object) 8 in a freely removable manner and can maintain a sealed state. The inspection device 1 is placed in the inspection chamber 1, the transfer device 2 for carrying in / out the inspection object (packaging body) 8, the decompression device 3 for reducing the pressure in the inspection chamber 1 (excluding air), and the inspection chamber 1. A detector 4 for detecting the degree of swelling (bulge height) of the bag 82 of the package 8, an outside air introduction pipe 5 with an electromagnetic opening / closing valve 51 for introducing outside air into the examination room 1, and an entrance / exit of the examination room 1 And a controller 7 for controlling the entire seal inspection apparatus.

  The inspection chamber 1 is composed of a box 11 provided with an opening serving as an entrance / exit of the package 8 on opposite side surfaces. The box 11 is provided with an inlet 12 on the left side and an outlet 13 on the right side in FIG. The size of the box 11 is not particularly limited, but a relatively small box having a lateral width of 50 to 60 cm, a depth of 40 to 50 cm, and a height of about 40 to 50 cm is employed.

  The entrance 12 and the exit 13 of the examination room 1 are opened and closed by an opening / closing device 14. The opening / closing device 14 has an inlet lid 15 and an outlet lid 16 so that the inlet lid 15 and the outlet lid 16 can be simultaneously opened and closed by a motor 18 via arms 17 and 17 and a plurality of gears 19, respectively. It is a thing. The motor 18 of the opening / closing device 14 is reversibly operated by a signal from the controller 7.

  The opening / closing device 14 has the inlet 12 and the outlet 13 closed by the inlet lid 15 and the outlet lid 16, respectively, in a state where the arms 17 and 17 are moving downward (shown by solid lines in FIG. 1). The inside of the examination room 1 is maintained in a sealed state, and the inlet 12 and the outlet 13 are opened when the arms 17 and 17 are moved upward as shown by chain lines.

  In this embodiment, the transport device 2 includes a carry-in conveyor 21 for carrying the package 8 into the inspection room 1, an indoor conveyor 22 installed in the examination room 1, and two for carrying the package 8 out of the examination room 1. (First and second) carry-out conveyors 23 and 24 are provided. The end portion of the carry-in conveyor 21 is connected to the start end portion of the indoor conveyor 22 so that it can be connected at the entrance 12 portion, and the end portion of the indoor conveyor 22 is connected to the start end portion of the first carry-out conveyor 23 so that transfer can be made at the exit 13 portion. The end portion of the first carry-out conveyor 23 is connected to the start end portion of the second carry-out conveyor 24 so as to be freely contacted and separated.

  The indoor conveyor 22 moves the object to be inspected (packaging body) 8 from the inlet 12 to the outlet 13 in the inspection room 1 and mounts the object to be inspected (packaging body) 8 in the inspection room 1 for seal inspection. It will be. The indoor conveyor 22 is driven by a motor 25 installed in the inspection room 1 because the inside of the inspection room 1 needs to be sealed. After receiving the package 8 from the entrance 12 of the inspection room 1, the indoor conveyor 22 conveys the package 8 to the exit 13 side by a predetermined length and stops. The stop control of the indoor conveyor 22 is detected by a position detector (not shown) when the package 8 moves to a predetermined position (a position directly below the detector 4 described later), and a detection signal from the position detector. Thus, the motor 25 can be stopped.

  In this embodiment, the first carry-out conveyor 23 functions as a seal-defective product removal device for removing a defective seal product from the regular line (not transferring it to the second carry-out conveyor 24 side). That is, the first carry-out conveyor 23 is installed such that the conveyor end side swings up and down by the air cylinder 26. In the air cylinder 26, the air from the air tank 28 is switched by the electromagnetic switching valve 27 (the expansion / contraction direction changes). When the air cylinder 26 is extended, the first carry-out conveyor 23 is connected to the second carry-out conveyor 24 as shown by a solid line, and when the air cylinder 26 is reduced, the first carry-out conveyor 23 is shown by a chain line (reference numeral 23 '). The second carry-out conveyor 24 is made discontinuous by being inclined downward. In the state where the first carry-out conveyor 23 is inclined downward (indicated by the chain line), the packaging body 8 delivered from the inside of the inspection chamber 1 is not transferred to the second carry-out conveyor 24 (defective product box). It is designed to be transported.

  A blower 31 is used in the decompression device 3, and the blower 31 is connected to the bottom of the examination room 1 (box 11) by an intake pipe 32. The decompression device 3 is continuously operated during the inspection operation. In the state where the lids 15 and 16 are closed (the inside of the examination room 1 is hermetically sealed), the air in the examination room 1 is sucked by the decompression device 3 (blower 31) in a very short time ( (Instantly) The inside of the examination room 1 is depressurized to about 0.8 atm.

  By the way, in the seal inspection device of this embodiment, when the inspection object (pneumatic package) 8 is accommodated in the inspection chamber 1 and the inspection chamber 1 is sealed, the decompression device 3 (blower 31) is operated. The air in the inspection chamber 1 is sucked out and is in a reduced pressure state (about 0.8 atm), so that the bag 82 of the object to be inspected (packaging body) 8 is indicated by a chain line (reference numeral 82 ′) due to the pressure difference inside and outside the bag. Swell. Thereafter, when the inside of the inspection chamber 1 is released from decompression (the electromagnetic on-off valve 51 of the outside air introduction pipe 5 is opened), the inside of the inspection chamber 1 returns to the atmospheric pressure (1 atm) and the bag 82 returns to the original state shown by the solid line. To do. The inspection object (pneumatic package) 8 is placed on the indoor conveyor 22 in the inspection room 1, and the bag 82 of the inspection object 8 is shown by a chain line when the inside of the inspection room 1 is decompressed. Swell to the upper surface side (the height of the bag upper surface increases).

  For the detector 4 that detects the degree of swelling of the bag 82, a distance sensor using ultrasonic waves is used. This detector (distance sensor) 4 is installed at a position directly above the package 8 that is stopped at a fixed position on the indoor conveyor 22 in the inspection room 1, and reaches the upper surface of the bag 82 of the package 8. The distance (the degree of swelling of the bag) is detected. The detection signal (distance data) from the detector 4 is output to the controller every moment.

  The outside air introduction pipe 5 communicates with the inside of the examination room 1. In addition, an electromagnetic open / close valve 51 is attached to the outside air introduction pipe 5, and the outside air introduction pipe 5 is opened or closed by opening / closing the electromagnetic on / off valve 51. The electromagnetic opening / closing valve 51 is opened / closed by a signal from the controller 7.

  When the blower 31 is in an operating state and the inlet lid 15 and the outlet lid 16 and the electromagnetic on-off valve 51 are closed, the inside of the examination chamber 1 is in a reduced pressure state (about 0.8 atm). When the electromagnetic on-off valve 51 is opened while the outlet lid 16 is closed, the outside air is introduced from the outside air introduction pipe 5 so that the inside of the examination chamber 1 returns to the atmospheric pressure (1 atm).

  The controller 7 has a function of receiving a detection signal (distance data) from the detector 4 and determining whether the degree of bag expansion when the inside of the examination room 1 is in a reduced pressure state is normal (seal normal) or not (seal failure). is doing.

2 to 4, as a method for inspecting the seal of the package body 8, the inside of the inspection chamber 1 is divided into a reduced pressure state (atmospheric pressure P ₁ = 0.8 atm) and an atmospheric pressure state (atmospheric pressure P ₀ = 1 atm). FIG. 2 is a graph showing changes in the bulge height of the upper surface of the bag when it is changed repeatedly (4 times), FIG. 2 shows a case where the bag seal is normal, and FIG. 3 shows a considerably large seal on the bag. The case where there is a defective portion is shown, and FIG. 4 shows the case where there is a very small seal defective portion in the bag.

In a package with a normal seal, the air in the bag is not released at the time of decompression (atmospheric pressure P ₁ ). Therefore, as shown in FIG. 2, from the detector 4 to the top surface of the bag at the time of decompression (atmospheric pressure P ₁ ). The detection distance H ₀ is short and the detection distance H ₀ at the time of each decompression is the same (the bulge height of the bag upper surface is high and constant). Further, in a package with a bag having a considerably large seal failure portion, a large amount of air is released from the seal failure portion at the time of decompression (atmospheric pressure P ₁ ). Therefore, as shown in FIG. The detection distance from the detector 4 to the bag upper surface in ₁ ) becomes very long as H _{1 to} H ₄ (the bulge height of the bag upper surface becomes low). Further, in a package having a very small poorly sealed portion in the bag, since the air in the bag is released from the poorly sealed portion in a small amount at the time of decompression (atmospheric pressure P ₁ ), as shown in FIG. When the pressure increases, the detection distance from the detector 4 to the upper surface of the bag at the time of depressurization (atmospheric pressure P ₁ ) is sequentially increased as H _{5 to} H ₈ (the bulge height of the upper surface of the bag is sequentially decreased). The detection distance data H _{0 to} H ₈ in FIGS. 2 to 4 are sequentially output to the controller 7.

  On the other hand, the controller 7 previously inputs (stores) the distance data from the detector 4 in the decompressed state in the package 8 with a normal seal, and the normal seal package previously input by the controller 7. 8 is compared with the distance data (bag bulge degree) of the package 8 to be inspected, and the distance data value of the package 8 to be inspected is equal to or less than the allowable value (the distance data value when the bulge degree of the bag increases). Is set to be considered as a normal seal product, and if the allowable value is exceeded, it is considered as a defective seal product. In the case of this embodiment, for the seal inspection of one package 8, the inside of the inspection chamber 1 is repeatedly changed between the reduced pressure state and the atmospheric pressure state four times, and the distance data at the time of the final pressure reduction. As a comparison target, the quality of the seal is determined.

The seal inspection apparatus of the embodiment of FIG. 1 operates as follows. At the start of the inspection operation, the blower 31 is suctioned, the first carry-out conveyor 23 is continuous with the second carry-out conveyor 24, the electromagnetic on-off valve 51 is open, and the open / close device 14 is open. (Shown in chain line). Further, the detection distance data (H _{0 in} FIG. 2) at the detector 4 in the package 8 with a normal seal is input to the controller 7 in advance as a reference value.

  And in order to carry in the to-be-inspected object 8 in the inspection chamber 1, the carrying-in conveyor 21 and the indoor conveyor 22 of the conveying apparatus 2 are operated, and the to-be-inspected object 8 on the carrying-in conveyor 21 is moved on the indoor conveyor 22. (At this time, the carry-in conveyor 21 is stopped), and the indoor conveyor 22 is stopped when the inspection object 8 reaches just below the detector 4. The start / stop control of the conveyors 21 to 24 is also performed by a signal from the controller 7.

After the indoor conveyor 22 is stopped, the opening / closing device 14 is closed by a signal from the controller 7 (the inlet lid 15 and the outlet lid 16 close the inlet 12 and the outlet 13 of the examination chamber 1), while the electromagnetic opening / closing valve 51 is closed. Is also closed. Then, the inside of the examination chamber 1 is depressurized (about 0.8 atm) by the suction of the blower 31. At that time, the bag 82 of the package 8 is swelled upward as indicated by the reference numeral 82 'due to the pressure difference inside and outside the bag. . At this time, the degree of swelling (bulge height) of the bag 82 is detected by the detector 4, and a detection signal (distance data) from the detector 4 is output to the controller 7. In this embodiment, the detection distance data (H ₀ in FIG. 2, H ₄ in FIG. 3, H ₈ in FIG. 4) for which the number of times of decompression is the fourth is used as a comparison target.

When the detected distance data to be compared is H ₀ in FIG. 2, since it is the same as the reference value H ₀ input in advance to the controller 7, no seal failure signal is output from the controller 7, and the opening / closing device 14. Is opened, the indoor conveyor 22, the first carry-out conveyor 23, and the second carry-out conveyor 24 operate as they are, and the normally-sealed package 8 is moved by the indoor conveyor 22, the first carry-out conveyor 23, and the second carry-out conveyor 24. Transport to normal product accumulation position.

On the other hand, when the detected distance data to be compared is H _{4 in} FIG. 3 or H ₈ in FIG. 4, it is larger than the reference value H ₀ input in advance to the controller 7, so that a seal failure signal is output from the controller 7. The Then, the electromagnetic switching valve 27 is turned on, the air cylinder 26 is reduced, and the first carry-out conveyor 23 is tilted downward so as to indicate a chain line (reference numeral 23 '). Before and after that, the opening / closing device 14 is opened, the indoor conveyor 22 and the first carry-out conveyor 23 are operated, and the first carry-out conveyor 23 in which the package 8 with poor seal is inclined downward from the indoor conveyer 22 is moved. After that, it is rejected to the defective product rejection position (defective product box). The first carry-out conveyor 23 returns to the original transfer position (position continuous with the second carry-out conveyor 24) after eliminating the package 8 with poor sealing.

  When the packaging body 8 in the inspection room 1 is discharged, the carry-in conveyor 21 and the indoor conveyor 22 are operated, and the next inspection object (packaging body) 8 is moved to a predetermined position in the inspection room 1 (a position directly below the detector 4). ) And the next seal inspection is performed in the same manner as described above. Note that the object to be inspected (packaging body) 8 that has been excluded as a sealing failure is discarded or returned to the packaging process and repackaged.

Thus, in the seal inspection apparatus (and seal inspection method) of this embodiment, the quality of the seal can be determined by detecting the degree of swelling of the bag 82 under the reduced pressure of the inspection object (packaging body) 8. Therefore, the seal inspection can be performed without adversely affecting the object to be inspected (pneumatic package) 8 such as compression. As a seal inspection method for the package 8, the inside of the inspection chamber 1 is repeated a plurality of times (four times) in a reduced pressure state (atmospheric pressure P ₁ = 0.8 atm) and an atmospheric pressure state (atmospheric pressure P ₀ = 1 atm). If the detection distance data at the time of the final decompression is used as a comparison object after the change, even if there is a minute seal failure portion in the bag 82, it can be detected reliably.

It is sectional drawing of the seal | sticker test | inspection apparatus of this-application Example. It is a graph which shows the change of the bag bulge height when test | inspecting the package with a normal seal | sticker with the seal | sticker test | inspection apparatus of FIG. It is a graph which shows the change of the bag swelling height when the package body with a big seal defect is test | inspected with the seal | sticker inspection apparatus of FIG. It is a graph which shows the change of the bag swelling height when the package body with a micro seal defect is test | inspected with the seal inspection apparatus of FIG.

Explanation of symbols

  1 is an examination room, 2 is a transport device, 3 is a decompression device, 4 is a detector, 5 is an outside air introduction pipe, 7 is a controller, 8 is a package, 31 is a blower, and 51 is an electromagnetic on-off valve.

Claims (3)

  A device for inspecting the sealing state of a package (8) in which the contents (81) are hermetically packaged together with air in a bag (82), wherein the package (8) can be inserted and removed freely and sealed. An inspection room (1) that can maintain the pressure, a decompression device (3) that decompresses the inside of the inspection room (1), and a bulge of the bag (82) of the package (8) placed in the inspection room (1) A detector (4) for detecting the degree, and a controller (7) for determining whether or not the bag (82) is sealed based on a bag bulge degree detection value from the detector (4). A package seal inspection device.   A method for inspecting the sealing state of a package (8) in which the contents (81) are hermetically packaged together with air in a bag (82), the package (8) being in a sealed state (1) The bag (82) of the package (8) is inflated by depressurizing the inside of the examination room (1), and based on the degree of expansion of the bag (82) at that time, the bag (82) A sealing inspection method for a package, characterized in that the quality of the seal is judged.   In Claim 2, the inside of the examination room (1) is repeatedly changed between a reduced pressure state and an atmospheric pressure state several times, and the bag (82) of the bag (82) is changed based on the degree of swelling of the bag (82) at the time of the final pressure reduction. A method for inspecting a seal of a package, wherein the seal is judged to be good or bad.

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