JP2008195419A - Method for inspecting defective seal of bag-shaped container having spout - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform the total inspection of defects of a seal part in each container reliably in a non-contact manner while a large number of bag-shaped containers with spouts having the seal part by holding the spout between overlapped sheets and sticking the sheets to each other being formed on a peripheral edge of the containers are conveyed by a conveyor or the like. <P>SOLUTION: A first radio tag including a conductive plate part 6, an insulating chip 7 and an antenna coil 8, and a second radio tag composed of a conductive plate part 10, an insulating chip 11, and an antenna coil 12 are arranged on a seal part formed on a peripheral edge of a container so that both radio tags do not overlap. The electromagnetic waves of the predetermined resonance frequency are respectively transmitted with the time difference to each radio tag, and the returned electromagnetic waves of the predetermined resonance frequency to be returned from each radio tag are respectively detected according to the transmitted electromagnetic wave. When the returned electromagnetic wave cannot be detected, it is determined that the seal part is defective. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a so-called pouch that is filled and sealed with the contents, and is a pouch with a spout called a spout. The present invention relates to a method for inspecting a sealing failure at a seal portion formed on a peripheral edge of a container by sandwiching and adhering them, and in particular, it can be inspected in a non-contact manner for a large number of continuously conveyed containers. The present invention relates to a seal inspection method for a bag-like container with a spout.

  As one type of bag-like container called pouch, a bag-like container with a spout that has a cylindrical spout called spout is used for blood for transfusion, physiological saline, glucose solution, etc. It has been widely used as a container for filling and sealing liquid foods such as drops, jelly, and beverages. In such a bag-like container with a spout, using a sheet having an inner surface that can be bonded by heat sealing or the like, with a resin spout sandwiched between the stacked sheets, Fill the contents inside the bag-like container by sealing at the periphery of the container by heat sealing etc. -Sealing has been conventionally performed.

  In such a bag-like container with a spout, the side portion of the spout that is bonded to the sheet on both sides is generally shaped like a boat with a cross-sectional shape so that it can be easily adhered to the sheet by heat sealing or the like. However, in the portion where the spout and the sheet are bonded, it is difficult to bond by heat sealing or the like compared to the portion where the sheets are bonded to each other. There is a risk that the frequency of occurrence will increase. Therefore, it is necessary to inspect the sealability (presence or absence of leakage) at the seal portion for all products in the bag-like container after filling and sealing.

In addition, although it is not a bag-like container with a spout, regarding inspection of a bag-like container, the following Patent Document 1 discloses a leak inspection machine for a flexible pouch by a high-frequency high-voltage application method. As an inspection method using a simple inspection machine, an insulating flexible pouch filled with conductive contents and sealed is interposed between electrodes, and the applied voltage between the electrodes does not break the insulating flexible pouch. If there is a pinhole in the pouch with a predetermined value, in the inspection method by the high-frequency high-voltage application method for detecting the pinhole by a discharge current that flows through the circuit due to a flash, before the pinhole inspection, , A flexible pouch inspection method characterized by pressurizing the pouch for a predetermined time is disclosed.
JP 2000-35373 A

  By the way, according to the conventionally known inspection method as described above, a bag shape with a spout in which a sealing portion is formed on the peripheral edge of the container by sandwiching the spout between the stacked sheets and bonding them together. Although the container can be inspected for a sealing failure at the sealed portion of the filled and sealed container, in the conventional inspection method as described above, each container is pressed in advance by a pressure device. In addition, since it is necessary to install them between both electrodes, there is a problem that it takes a lot of time to inspect all of a large number of containers continuously conveyed by a conveyor or the like.

  In addition, when the filled and sealed product is sterilized by heating and then cooled with cooling water, it is necessary to dry the surface of the container completely after cooling. May occur, and even a product having no problem may be treated as a defective product.

  An object of the present invention is to eliminate the above-described problems. Specifically, a sealing portion is provided at the peripheral edge of the container by sandwiching a spout between the stacked sheets and bonding them together. Regarding the formed bag-like containers with spouts, while transporting a large number of containers on a conveyor, etc., it is possible to inspect 100% of the defective seals in each container without contact. It is to be an issue.

  In order to solve the above-described problems, the present invention provides a spout-equipped bag-like container in which a spout is sandwiched between stacked sheets and a seal portion is formed at the peripheral edge of the container by adhering them. In a method for inspecting a defect in a seal portion of a sheet, a resonance circuit is formed on an inner surface side of one of the sheets to be overlapped, which includes an antenna coil having a predetermined electric circuit constant and a capacitor, and can obtain a predetermined resonance frequency. The first wireless tag is provided, and the inner surface of the other sheet to be overlapped is formed with a resonance circuit that includes an antenna coil and a capacitor having a predetermined electric circuit constant and obtains a predetermined resonance frequency. Two wireless tags are provided, and the first wireless tag and the second wireless tag are arranged so as not to overlap the seal portion formed on the peripheral edge of the container. When the electromagnetic wave having a predetermined resonance frequency is transmitted, and the return electromagnetic wave having a predetermined resonance frequency returned from each wireless tag in response to the transmitted electromagnetic wave is detected. Is characterized in that it is determined that the seal portion is defective.

  According to the sealing failure inspection method for a bag-like container with a spout according to the present invention as described above, if there is no problem with the seal part where the sheets or the spout and the sheet are bonded, When an electromagnetic wave having a predetermined resonance frequency is transmitted with a time difference, the antenna coil resonates in each wireless tag by arranging the first wireless tag and the second wireless tag so as not to overlap each other. An amount of electric charge corresponding to the frequency is generated, the capacitor stores the electric charge, and an electromagnetic wave having a predetermined resonance frequency received by the antenna coil is returned by the energy.

  On the other hand, when there is a problem with the seal part where the sheets or the spout and the sheet are bonded, foreign matter such as contents comes into contact with the antenna coil of at least one of the wireless tags. The inductance of the coil changes, the impedance which is a predetermined electric circuit constant changes, and accordingly, the wireless tag can no longer resonate with an electromagnetic wave with a predetermined resonance frequency, and therefore does not transmit a return electromagnetic wave with a predetermined resonance frequency. Become.

  Therefore, in each of a large number of bag-like containers transported by a conveyor or the like, an electromagnetic wave having a predetermined resonance frequency is transmitted with a time difference with respect to each wireless tag, and from each wireless tag according to the transmitted electromagnetic wave. When the return electromagnetic wave cannot be detected by detecting each return electromagnetic wave having a predetermined resonance frequency, it may be determined that the sheets or the seal portion where the spout and the sheet are bonded is defective. it can. As a result, while a large number of bag-like containers are being conveyed by a conveyor or the like, it is possible to easily inspect all of the defective seals in each container without contact.

  The portion of the sealing portion of the bag-like container where the spout is sandwiched is the portion where adhesion by heat sealing or the like is difficult to perform and the seal failure is most likely to occur. By forming this portion, it is possible to reliably detect a defect in the seal portion at that portion. In addition, the antenna coil and the capacitor constituting each wireless tag are formed thin by printing, so that the sealing performance at the sealing portion is not affected and a good sealing portion can be maintained.

  Furthermore, when there is a problem with the seal part and a return electromagnetic wave with a predetermined resonance frequency cannot be detected, there are various types of resonance circuits for wireless tags whose impedance has changed due to contact with foreign matter such as liquid contents. By transmitting an electromagnetic wave having a frequency to cause the wireless tag to resonate, the degree of failure at the seal portion can be determined by the magnitude of the frequency of the transmitted electromagnetic wave from which the resonance is obtained.

  While carrying a large number of containers on a conveyor, etc., with respect to a bag-like container with a spout formed by sealing the spout between the stacked sheets and bonding them together In addition, the purpose of making it possible to inspect 100% of defective seals in each container without contact is definitely the best mode, as specifically shown in the following embodiment, Provided on the inner surface side is a first wireless tag in which a resonance circuit that includes an antenna coil and a capacitor having a predetermined electric circuit constant and obtains a predetermined resonance frequency is formed, and on the inner surface side of the other sheet to be superimposed Providing a second wireless tag having a resonance circuit comprising an antenna coil having a predetermined electric circuit constant and a capacitor and capable of obtaining a predetermined resonance frequency; The first wireless tag and the second wireless tag are arranged so as not to overlap each other on the formed seal portion, and an electromagnetic wave having a predetermined resonance frequency is transmitted to each wireless tag with a time difference, and the transmitted electromagnetic wave This is realized by a method in which a return electromagnetic wave having a predetermined resonance frequency returned from each wireless tag is detected, and if the return electromagnetic wave cannot be detected, the seal portion is determined to be defective.

A bag-like container with a spout to which the seal failure inspection method of the present invention is applied is a so-called pouch in which the contents are filled and sealed, and has a spout called a spout. For a sheet for forming a bag-like container, a metal foil such as an aluminum foil that shields electromagnetic waves is not used, and the inner surface side of the container can be bonded by heat sealing or the like. For example, the layer structure may be a single layer structure or a multilayer structure in which an EVOH resin or a polyamide resin excellent in gas barrier properties is sandwiched. In addition, about the thickness of a sheet | seat, about 100-120 micrometers is suitable for a total thickness. Also, spouts called spouts are manufactured as separate parts by an injection molding method in which a resin is injected into a mold and molded. The material used is an olefin resin with excellent heat sealability. Is suitable, but is not particularly limited.
An embodiment of the seal failure inspection method of the present invention applied to a bag-like container called a pouch with a spout comprising such a sheet and a spout will be described below.

  As shown in FIG. 6 (A), the bag-like container with a spout to which the seal defect inspection method of the present invention is applied uses two transparent sheets and one spout in this embodiment. The two sheets 2 and 3 (front side and back side) having substantially the same shape and side walls of the container are overlapped so that the heat-sealable surfaces face each other, and the peripheral edges of the sheets 2 and 3 After inserting the spout 4 having a boat-shaped cross section between the sheets 2 and 3 at the portion (lower end portion), as shown in FIG. 6B, a portion along the peripheral edge of the sheets 2 and 3 ( The outer side of the part indicated by the two-dot chain line) is heat-sealed, and the sheets 2 and 3, the sheet 2 and the spout 4, and the sheet 3 and the spout 4 are respectively connected to the inner surfaces of the sheets 2 and 3. Sealing part 1a is formed in the peripheral part of the container by heat bonding on the side surface, and the spout It is formed into a bag-shaped container 1 with a.

  The bag-like container with a spout of the present embodiment so formed is a pouch with a spout whose contents are blood used for blood transfusion, physiological saline used for infusion, and the like. A ring part 5 for suspension is integrally formed at the end on the opposite side, and the ring part 5 is used on the upper side and the spout 4 on the lower side. In addition, the part of the spout 4 is sealed with the cap 4a provided with the top plate part which can insert an injection needle.

  For filling and sealing the contents into such a bag-like container with a spout, after filling the contents from the spout 4 without the cap 4a, the cap 4a is put on and the spout 4 is sealed. Or, although not shown in the figure, the cap 4a is put on the spout 4 and an unbonded portion is provided on a part of the seal portion 1a, and after filling the content from this portion, this portion is By sealing by heat sealing, a product in a container in which the contents are filled and sealed inside the bag-like container is obtained.

  By the way, in the bag-like container 1 with the spout, in which the sheets 2 and 3 and the spout 4 are thermally bonded at the peripheral edge of the container as described above, in this embodiment, the container formed by heat sealing. As shown in FIG. 1, a first wireless tag including a conductive plate portion 6, an insulating chip 7, and an antenna coil 8, a conductive plate portion 10, an insulating chip 11, and an antenna coil 12 are provided on the peripheral seal portion 1 a. Are arranged so that they do not overlap each other.

  Specifically, as shown in FIG. 2, the inner surface of the sheet 3 on the back side and the portion to be bonded to the sheet 2 and the spout 4 on the front side are insulated from the conductive plate portion 6 as shown in FIG. A first wireless tag including a chip 7 and an antenna coil 8 is provided in advance, and a portion of the inner surface of the front-side sheet 2 to be bonded to the rear-side sheet 3 and the spout 4 is illustrated. As shown in FIG. 3, a second wireless tag including a conductive plate portion 10, an insulating chip 11, and an antenna coil 12 is provided in advance. FIG. 2 shows the back side sheet 3 as viewed from the inner surface side, and FIG. 3 shows the front side sheet 2 as viewed from the outer surface side.

    As shown in FIGS. 6A and 6B, the sheet 3 provided with the first wireless tag in advance and the sheet 2 provided with the second wireless tag in advance are inserted between the sheets 2 and 3, respectively. As shown in FIG. 1, the seal portion 1a formed on the peripheral portion of the container is formed by stacking the sheets 2 and 3 with the outlet 4 being sandwiched and then heat-sealing the peripheral portions of the sheets 2 and 3. In addition, the first wireless tag including the conductive plate portion 6, the insulating chip 7, and the antenna coil 8, and the second wireless tag including the conductive plate portion 10, the insulating chip 11, and the antenna coil 12 are mutually connected. It is arranged so that it does not overlap.

  As described above, in the first wireless tag (and second wireless tag) arranged on the seal portion at the peripheral portion of the container, the antenna coil 8 (and antenna coil 12) formed along the entire circumference of the peripheral portion of the container. In order to make a resonant circuit, the conductive plate portion 6, the insulating chip 7, the antenna coil 8 and the antenna coil 8 (and the antenna coil 12) are arranged in the vicinity of the end portion of the coil wire of the antenna coil 8 (and the antenna coil 12). Thus, the capacitor 9 (and the capacitor 13 is formed by the conductive plate portion 10, the insulating chip 11, and the antenna coil 12).

  In this embodiment, the antenna coils 8 and 12 are both printed with resin conductive ink mixed with metal powder that is harmless to the human body such as iron powder, silver powder, and gold powder. In the first wireless tag, the antenna coil 8 is printed on an eight-fold coil, the coil line width is about 0.4 mm, and the distance between each coil line is about 0.8 mm. The length of the short side is about 74 mm, the length of the long side is about 100 mm, and the inductance thereof has a value of 17.6 μH. On the other hand, in the second wireless tag, the antenna coil 12 is printed on a triple coil, the coil line width is about 0.4 mm, and the distance between each coil line is about 0.8 mm. The length on the short side is about 60 mm, the length on the long side is about 85 mm, and the inductance thereof has a value of 2.9 μH.

  Further, any of the capacitors 9 and 13 is formed by printing. In the first wireless tag, a part of the peripheral edge of the container (the upper left part of the container) is arranged outside the antenna coil 8 as shown in FIG. One coil wire end portion on the edge side is connected to the conductive plate portion 6, and the entire coil width of the antenna coil 8 excluding this coil wire end portion and the conductive plate portion 6 are opposed to each other in a state where they are blocked by the insulating chip 7. Thus, this portion is formed in the capacitor 9, and the role of the storage battery, which is an energy source for becoming a wireless tag that resonates with the electromagnetic wave received by the resonance circuit composed of the antenna coil 8 and returns the electromagnetic wave of the resonance frequency. It is done.

  Specifically, in the present embodiment, on the inner surface of the sheet 3, first, the antenna coil 8 with eight coil wires is printed with conductive ink along the entire circumference of the peripheral portion of the sheet 3. In order to cover the antenna coil 8 in the width direction at a part of the periphery of the sheet 3 (in the vicinity of the line end portion of the antenna coil 8), leaving one of the line end portions on the outer edge side of the antenna coil 8. The insulating chip 7 is printed by ink making, and the conductive plate portion 6 is printed by conductive ink so as to cover the entire width of the antenna coil 8 from above, and the outer edge side of the eight coil wires is printed. The remaining seven of the end portions are covered with the insulating chip 7 and one of the wire end portions on the outer edge side of the coil wire is covered with the conductive plate portion 6 so that one of the outer edge sides of the antenna coil 8 is covered. Only the coil wire end is connected to the conductive plate 6 . In such a first wireless tag, the capacitance of the capacitor 9 has a value of 10.7 pf, and the resonance frequency is 13.56 MHz.

  On the other hand, in the second wireless tag, one coil wire end portion on the outer edge side of the antenna coil 12 is connected to the conductive plate portion 10 at a part of the peripheral portion of the container (lower right portion of the container) as shown in FIG. The coil full width (including the inner conductive part 12a that is the line end part on the inner edge side) of the antenna coil 12 excluding the coil wire end part and the conductive plate part 10 are opposed to each other in a state of being blocked by the insulating chip 11. Thus, this portion is formed in the capacitor 13 and plays the role of a storage battery which is an energy source for a wireless tag that resonates with the electromagnetic wave received by the resonance circuit composed of the antenna coil 12 and returns the electromagnetic wave of the resonance frequency. I am letting.

  Specifically, in this embodiment, first, the conductive plate portion 10 is printed on the inner surface of the sheet 2 with conductive ink, and the conductive plate portion 10 is left on the conductive plate portion 10 by leaving a part of the conductive plate portion 10 thereon. The insulating chip 11 is printed with resin ink so as to cover, and further, the antenna coil 12 with the triple coil wire is printed with conductive ink along the entire periphery of the peripheral portion of the sheet 2 from above, The wire end portion on the inner edge side of the coil wire is formed in the plate-like inner conductive portion 12a, and the three remaining ones on the outer edge side of the coil wire that is quadruple at the wire end portion are formed on the insulating chip 11. The inner conductive portion 12a formed on the inner edge side of the coil wire is placed on the insulating chip 11, and one of the wire end portions on the outer edge side of the coil wire is exposed on the conductive plate portion 10 (insulating property). By passing over the part that does not overlap the chip 11, the antenna connector And only then connected to the electrically Denban portion 10 one coil wire end portion of the outer edge side Le 12. In such a second wireless tag, the line end portion on the inner edge side of the antenna coil 12 is formed in the plate-like inner conductive portion 12a, so that the capacitance of the capacitor 13 exhibits a value of 69.0 pf. The resonance frequency is 11.2 MHz.

  By forming the first wireless tag and the second wireless tag on the sheets 2 and 3 as described above, the spout 4 is sandwiched between the sheets 2 and 3, and the peripheral portions of the sheets 2 and 3 are heated. When sealed, there are an antenna coil and a capacitor (conductive plate) in the seal part (between each sheet 2 and 3 and between each sheet 2 and 3 and the spout 4) of the peripheral part of the bag-like container with spout. The first wireless tag and the second wireless tag that are provided with a resonance circuit composed of a first portion, an insulating chip, and an antenna coil are provided. In addition, in the portion of the spout 4 of the bag-like container 1 (between the sheets 2 and 3 and the spout 4), the capacitors 9 and 13 of the respective wireless tags are not formed, and the antenna coil 8 by the coil wire is formed. , 11 are formed.

  In the sealing failure inspection method of the present embodiment using the bag-like container with the spout provided with the first wireless tag and the second wireless tag as described above, the contents are continuously conveyed while being filled and sealed. The electromagnetic waves having a predetermined resonance frequency are transmitted to each container with a time difference, and the response electromagnetic waves having a predetermined resonance frequency returned from each wireless tag according to the transmitted electromagnetic waves are respectively detected and returned. If a magnetic wave is detected, it is determined that there is no problem in the seal portion.

  Specifically, in this embodiment, an electromagnetic wave having a resonance frequency of about 13.56 MHz is transmitted to the first wireless tag by a dip meter, and an amount of electric charge corresponding to the resonance frequency is generated in the antenna coil 8. The electric charge is stored, and the electromagnetic wave having a resonance frequency of about 13.56 MHz received by the antenna coil 8 is returned by the energy. The returned electromagnetic wave is received by the dip meter, and the resonance is about 11.2 MHz with a time difference. An electromagnetic wave having a frequency is transmitted to the second wireless tag by a dip meter to generate an amount of electric charge corresponding to the resonance frequency in the antenna coil 12, the capacitor 13 stores the electric charge, and the energy received by the antenna coil 12 by the energy. An electromagnetic wave with a resonance frequency of 11.2 MHz is returned, and the returned electromagnetic wave is received by the dip meter. Both reply electromagnetic wave when receiving the DIP meter is determines that there is no problem with the sealing portion.

  On the other hand, when there is a problem in the seal portion and foreign matter such as contents are in contact with at least one of the antenna coils 8 and 12, the antenna coil inductance changes in the antenna coil wireless tag. As a result, the impedance changes, and the resonance circuit of the wireless tag does not respond to the electromagnetic wave of the resonance frequency. Even if the electromagnetic wave of the predetermined resonance frequency is transmitted, the return magnetic wave of the predetermined resonance frequency cannot be detected. Therefore, in that case, it is determined that the seal portion is defective.

  According to the sealing failure inspection method for the bag-like container with the spout of the present embodiment as described above, first, each antenna coil 8 constituting the first wireless tag and the second wireless tag provided in the bag-like container, 12 and capacitors 9 and 13 (conductive plate portions 6 and 10 and insulating chips 7 and 11) are all thinly formed by printing, so that the overlapped sheets (and each sheet and spout) Even if they are provided in the intermediate seal portion, the seal performance at the seal portion can be maintained well without substantially affecting the seal performance at the seal portion.

  Then, for each of a large number of bag-like containers conveyed by a conveyor or the like, an electromagnetic wave having a predetermined resonance frequency is transmitted with a time difference between the first wireless tag and the second wireless tag of each container, By detecting each return electromagnetic wave, we check for defects at the seal part of each container, so during the continuous transportation of a large number of bag-like containers on a conveyor etc., at the seal part of each container 100% can be easily inspected for non-contact seals.

  If there is a problem with the seal part and a return electromagnetic wave with a predetermined resonance frequency cannot be detected, and you want to separate the level of defects (defects) at the seal part, a bag-like container rejected as a seal defect by inspection Resonance is obtained by transmitting electromagnetic waves of various frequencies to cause resonance in the wireless tag to the resonance circuit of the wireless tag whose impedance has changed due to contact with foreign matter such as contents. The degree of failure at the seal portion can be easily determined according to the frequency of the transmitted electromagnetic wave.

  That is, when at least one of the antenna coils 8 and 12 of each wireless tag increases the number of shorts due to the contact of foreign matter such as contents among a plurality of coil wires in the width direction of the antenna coil, it resonates and returns. Since the frequency of the electromagnetic wave to be transmitted is high, the higher the frequency of the electromagnetic wave that is resonated and returned, the greater the degree of defects (seal failure) at the seal part due to contact with foreign matter such as contents Can be determined. Specifically, if the resonance frequency is slightly higher than the predetermined resonance frequency, it can be determined that the degree of failure at the seal portion is light, while the resonance frequency is considerably higher than the predetermined resonance frequency. Since most of the plurality of antenna coils in the width direction are short-circuited, it can be determined that there is a serious defect that the contents are likely to leak from the seal portion.

  As mentioned above, although one Example of the sealing defect inspection method of the bag-shaped container with a spout of the present invention was described, the present invention is not limited only to the above examples, for example, about a bag-shaped container. Is not limited to a stack of two sheets as shown in the embodiment, but is not limited to a stack of two long sheets or a so-called pillow type, and includes a plurality of side wall portions. And a single bottom wall portion, and may be a bag-like container having an appropriate structure, and each wireless tag having a resonance circuit including an antenna coil and a capacitor is as shown in the embodiment. The number of coil wires is not limited to that of each antenna coil, and the number of coil wires in the width direction of each antenna coil (how many coils are used) can be appropriately selected, and can be appropriately changed. This thing It is needless to say.

Front explanatory drawing which shows the state in which the 1st radio | wireless tag and the 2nd radio | wireless tag are formed in the seal part of a container peripheral part in an example of the bag-like container with a spout to which the inspection method of this invention is applied. The front view which shows the radio | wireless tag printed on the inner surface of the sheet | seat of the back side about the 1st radio | wireless tag shown in FIG. 1 in the state seen from the inner surface side of the sheet | seat. The front view which shows the state which looked at the radio | wireless tag printed on the inner surface of the sheet | seat of the front side about the 2nd radio | wireless tag shown in FIG. 1 from the outer surface side of the sheet | seat. Sectional drawing of the part along the AA of FIG. 1 which shows the part of the capacitor | condenser provided in the seal | sticker part between each sheet | seat about the 1st radio | wireless tag shown in FIG. Sectional drawing of the part along the BB line of FIG. 1 which shows the part of the capacitor | condenser provided in the seal | sticker part between each sheet | seat about the 2nd radio | wireless tag shown in FIG. About an example of a bag-like container with a spout shown in FIG. 1, (A) a side view showing a state of a sheet and a spout before being formed into a bag-like container by heat sealing, and (B) a peripheral portion of the container The front view which shows the state shape | molded in the bag-like container with a spout by heat-sealing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag-shaped container 1a Seal part 2 Sheet | seat on the front side 3 Sheet | seat on the back side 4 Spout 4a (of spout) Cap 5 Ring part 6 Conductive plate part 7 (of 1st radio tag) Insulation (of 1st radio tag) Chip 8 (first radio tag) antenna coil 9 (first radio tag) capacitor 10 (second radio tag) conductive plate 11 (second radio tag) insulating chip 12 (second radio tag) ) Antenna coil 12a Inner conductive part (of antenna coil) 13 Capacitor (of second radio tag)

Claims (4)

  In a method for inspecting a defect in a sealing portion of a bag-like container with a spout where a sealing portion is formed on the peripheral edge of the container by sandwiching the spout between the stacked sheets and bonding them together, Provided on the inner surface side of one sheet to be combined is a first wireless tag in which a resonance circuit comprising an antenna coil and a capacitor having a predetermined electric circuit constant and having a predetermined resonance frequency is formed. A seal formed on the periphery of the container by providing a second wireless tag on the inner surface side of the sheet, which is formed with an antenna coil having a predetermined electric circuit constant and a capacitor and having a resonance circuit capable of obtaining a predetermined resonance frequency. The first wireless tag and the second wireless tag are arranged so as not to overlap each other, and an electromagnetic wave having a predetermined resonance frequency is applied to each wireless tag with a time difference. By transmitting and detecting a return electromagnetic wave having a predetermined resonance frequency returned from each wireless tag according to the transmission electromagnetic wave, if the return electromagnetic wave cannot be detected, the seal portion is determined to be defective. A sealing failure inspection method for a bag-like container with a spout, characterized by   The seal of the bag-shaped container with spout according to claim 1, wherein a portion of the seal portion of the bag-like container is formed with a portion of the antenna coil of each wireless tag at a portion where the spout is sandwiched. Defect inspection method.   A time difference is set for each wireless tag, an electromagnetic wave having a predetermined resonance frequency is transmitted, and a response electromagnetic wave having a predetermined resonance frequency returned from each wireless tag according to the transmitted electromagnetic wave is detected. When the return electromagnetic wave cannot be detected, the resonance of the RFID tag that cannot be detected is searched for the transmitted electromagnetic wave that can be resonated. 3. The method for inspecting a sealing failure of a bag-like container with a spout according to claim 1 or 2, wherein the degree of the above is determined.   In order to form the first wireless tag and the second wireless tag, an antenna coil is formed along the entire periphery of the peripheral portion of the sheet surface with respect to each sheet surface on the inner surface side of the side wall portion of the bag-like container. In addition, the coil wire end portion of the antenna coil is connected to the conductive plate portion at a part of the periphery of the sheet surface, and the entire coil coil width excluding the coil wire end portion is blocked by the insulating chip, By facing the conductive plate portion, the conductive plate portion made of conductive ink, the insulating chip made of resin ink, and the antenna coil made of conductive ink are formed by printing so as to form a capacitor. The sealing failure inspection method for a bag-like container with a spout according to any one of claims 1 to 3.

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