JP5222612B2 - Sealing defect inspection method and inspection apparatus for containers and packaging products - Google Patents

Sealing defect inspection method and inspection apparatus for containers and packaging products Download PDF

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JP5222612B2
JP5222612B2 JP2008099839A JP2008099839A JP5222612B2 JP 5222612 B2 JP5222612 B2 JP 5222612B2 JP 2008099839 A JP2008099839 A JP 2008099839A JP 2008099839 A JP2008099839 A JP 2008099839A JP 5222612 B2 JP5222612 B2 JP 5222612B2
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canopy
bottom plate
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displacement waveform
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JP2009249004A (en
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孝浩 中島
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Nissin Electronics Co Ltd
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Description

本発明は円筒状の容器内に即席調理食品等の内容物を収納し、薄膜状の天蓋で気体と共に封止した容器包装製品の封止不良検査方法および検査装置に関する。   The present invention relates to a sealing failure inspection method and inspection apparatus for a container package product in which contents such as instant cooked food are stored in a cylindrical container and sealed together with gas by a thin film canopy.

コンビニの普及や若者を中心とした消費者の安価で手軽な食品への需要の高まり、生活スタイルの多様化や多忙化のため個食の食事様式が増加したこと等と相まって、スナック菓子に代表される調理済み食品が広く普及し消費されるようになった。
例えば、普及と多様化が著しいスナック菓子製品の中には、発泡スチロール製または下窄まりの紙製でアルミ箔内装した深底の略椀状容器内に、アルファー化処理され後、真空乾燥処理された調理済み菓子等を収納した後、上部開口を内側がアルミ箔内装された柔軟なプラスチック薄膜シートから成る天蓋で熱圧着処理等の接着処理により封入したものである。 Coupled with the spread of convenience stores, the growing demand for cheap and easy foods by consumers, especially young people, and the increased dietary style of individual meals due to diversified lifestyles and busyness, etc. Pre-prepared food has become widespread and consumed.
For example, some snack confectionery products that have been widely spread and diversified were alpha-treated in a deep bowl-like container made of styrofoam or squeezed paper and covered with aluminum foil, and then vacuum-dried. After storing cooked confectionery, etc., the upper opening is sealed with a canopy made of a flexible plastic thin film sheet with an aluminum foil inside and bonded by a thermocompression treatment or the like.

かかる調理済み食品においても、昨今話題となった中国製輸入食品の危険物質混入事件以来、一層その安全性への要求が強まっている。かかる観点から調理済み食品における密封容器や包装体の封止不良は内部への雑菌や酸素の進入を許容し、内部の食品の腐敗や酸化を招いて食中毒事件に発展する虞があるため、厳重に防止管理する必要がある。
特に、スナック菓子等の円筒状容器に封入した調理済み食品製品の封止不良検出に特化した従来技術として、下記文献に開示された発明が知られている。これらの発明は内部気圧を高めた状態で天蓋を軽圧下し、その前後の該天蓋の膨出量の変化を調べることにより、該調理済み食品包装体の封止不良の有無を検出するものである。
特開平８−４０４２３号公報 特開２００１−５８６１７号公報 本発明者等は上記従来技術の効果を検証するために、これらの文献に開示された密封不良検査装置と同様の封止不良検査装置を試作して、各種評価試験を行った。 Even for such cooked foods, there has been an increasing demand for safety since the incident of contamination of dangerous substances in Chinese imported foods, which has become a hot topic recently. From this point of view, poor sealing of sealed containers and packages in cooked foods allows the invasion of germs and oxygen into the interior, leading to the corruption and oxidation of the food inside, and may lead to food poisoning incidents. Need to prevent and manage.
In particular, the invention disclosed in the following documents is known as a prior art specialized in detecting defective sealing of a cooked food product sealed in a cylindrical container such as a snack. These inventions detect the presence or absence of sealing failure of the cooked food package by lightly lowering the canopy with the internal air pressure raised and examining the change in the amount of swelling of the canopy before and after that. is there.
JP-A-8-40423 JP, 2001-58617, A In order to verify the effect of the above-mentioned prior art, the present inventors made a prototype of a sealing failure inspection device similar to the sealing failure inspection device disclosed in these documents, and performed various evaluation tests. Went.

図１９は上記試作検査装置の概要を示す正面図である。この装置では円筒状容器に密封された調理済み食品包装体に相当する検品３５が搬入コンベア３４上に載置された状態で送り込まれ、一対の側接コンベア３２がその筒側面に加圧接触して周回移動することにより、該検品３５を把持して検査位置へと搬送する。検品３５は側接コンベア３２に把持されることにより内圧が高まり、その天蓋が膨出する。
搬入コンベア３４の下流には弾性力により上方に付勢された複数の加圧コロ３３が配設されていて、搬送されてきた検品３５の下方に膨出した天蓋を複数回上方に押圧する。変位センサ３１は押圧された後の天蓋の変位量を測定し、図示しない良否判定装置に転送する。上記良否判定装置では、該押圧された後の天蓋の変位量データが、図示しないセンサで測定した押圧前の天蓋の変位量データと比較され、検品３５の密封不良の有無が判定される。密封不良の有無が判定された後、検品３５は搬出コンベア３４により下流に搬送され、不良品は図示しない排除装置により異なる排出路に振り分けられる。 FIG. 19 is a front view showing an outline of the prototype inspection apparatus. In this apparatus, an inspection product 35 corresponding to a cooked food package sealed in a cylindrical container is fed in a state of being placed on a carry-in conveyor 34, and a pair of side conveyors 32 are in pressure contact with the cylinder side surfaces. Thus, the inspection product 35 is gripped and conveyed to the inspection position. As the inspection product 35 is gripped by the side conveyor 32, the internal pressure increases and the canopy bulges.
A plurality of pressure rollers 33 urged upward by elastic force are disposed downstream of the carry-in conveyor 34, and presses the canopy bulging below the inspection 35 being conveyed upward a plurality of times. The displacement sensor 31 measures the amount of displacement of the canopy after being pressed, and transfers it to a quality determination device (not shown). In the above pass / fail determination apparatus, the displacement data of the canopy after being pressed is compared with the displacement data of the canopy before being pressed measured by a sensor (not shown), and the presence or absence of a sealing failure of the inspection product 35 is determined. After the presence or absence of sealing failure is determined, the inspection product 35 is conveyed downstream by the carry-out conveyor 34, and the defective product is distributed to different discharge paths by a not-shown exclusion device.

上記試作機で本発明者等が多数の検品について評価試験をした結果、密封不良の検品についてはかなり効率良く判定できたが、不良品と判定された検品の中には少なからず良品の検品が含まれていたことが分かった。図２０は内圧が小さいと思われる検品について良否判定を行った結果を例示したものである。
この表から分かるように、内圧が小さいと思われる封止不良の検品群では、１０個の検品中、９個を正しく不良品として判定しているのに対して、封止良好の検品群では１０個の検品中、４個しか良品判定できていない。このように、良品判定の精度が劣ると、何ら問題なく完成した容器包装製品が不良品として破棄されることになり、販売価格の上昇を招くばかりでなく、不要の廃棄物が排出されることによる環境負荷の増大をも招くことになる。 As a result of the evaluation tests conducted on many inspections by the inventors using the above prototype, it was possible to determine the inspection for defective sealing fairly efficiently, but there were not a few good inspections among the inspections determined to be defective. I found that it was included. FIG. 20 exemplifies the result of accepting or rejecting the inspection that seems to have a low internal pressure.
As can be seen from this table, in the inspection group with poor sealing whose internal pressure seems to be small, 9 out of 10 inspections are correctly judged as defective products, whereas in the inspection group with good sealing, Out of 10 inspections, only 4 are good. In this way, if the accuracy of the non-defective product judgment is inferior, the container / package product completed without any problems will be discarded as a defective product, which will not only increase the selling price but also discharge unnecessary waste. It will also lead to an increase in the environmental load due to.

この理由について本発明者等が検討したところ、上記従来技術では検品の内圧を上昇させる手段として、検品３５は側接コンベア３２で加圧把持されているため、検品３５は加圧により水平断面が楕円形に変形し、その歪み力が検品３５の薄膜状の天蓋に異方性を伴う張力と縮み力を生ぜしめるため、特に内圧が小さいと思われる検品では十分な膨出変位が得られず、誤判定を招いたのではないかと推察される。
本発明は従来技術におけるかかる事情に鑑みて為されたものであり、円筒状の容器内に内容物を収納し、薄膜状の天蓋で気体と共に封止した容器包装製品において、内圧の大小に拘わらず、不良品のみならず、良品も精度良く判定することができる封止不良検査方法および検査装置を提供することを目的とする。 The present inventors have examined the reason for this. As a means for increasing the internal pressure of the inspection in the above-described prior art, the inspection 35 is pressed and held by the side conveyor 32, so that the inspection 35 has a horizontal cross section due to pressurization. Deformation into an ellipse, and the distortion force generates tension and contraction force with anisotropy in the thin film canopy of the inspection product 35. Therefore, sufficient bulging displacement cannot be obtained particularly in the inspection product that seems to have a low internal pressure. It is presumed that an erroneous determination was invited.
The present invention has been made in view of such circumstances in the prior art. In a container package product in which contents are stored in a cylindrical container and sealed with a gas by a thin film canopy, the inner pressure is small or large. In addition, it is an object of the present invention to provide a sealing defect inspection method and inspection apparatus that can accurately determine not only defective products but also non-defective products.

上記目的を達成するために請求項１に記載の本発明の容器包装製品の封止不良検査方法は、  In order to achieve the above-described object, a sealing failure inspection method for a container-packaged product according to the present invention according to claim 1,
円筒状の容器内にスナック菓子等の内容物を収納し、薄膜シート状の天蓋で気体と共に開口部を封止した容器包装製品の封止不良検査方法において、上記容器の側面が一対の部材で強く押圧されることなく把持された状態で上記天蓋に外圧を加えて、上記容器内圧を高めると共に上記天蓋を緊張状態に保ちつつ、上記容器の底板に外方より空気を間欠的に複数回吹き付けることで押圧力を複数回間欠的に付与したときの該底板の変位の変化を表す変位波形の特徴点を調べて上記容器包装製品の封止不良を判定したことを特徴とする。  In a sealing failure inspection method for a container packaged product in which contents such as snacks are stored in a cylindrical container and the opening is sealed together with gas with a thin film sheet canopy, the side surfaces of the container are strongly bonded by a pair of members. Applying external pressure to the canopy in a gripped state without being pressed to increase the internal pressure of the container and keep the canopy in tension, while intermittently blowing air to the bottom plate of the container multiple times from the outside Then, the feature point of the displacement waveform representing the change in displacement of the bottom plate when the pressing force is intermittently applied a plurality of times is examined to determine the sealing failure of the container packaged product.

また、上記目的を達成するために請求項２に記載の本発明の容器包装製品の封止不良検査装置は、  In addition, in order to achieve the above object, a sealing failure inspection device for a container packaged product of the present invention according to claim 2,
円筒状の容器内にスナック菓子等の内容物を収納し、薄膜シート状の天蓋で気体と共に開口部を封止した容器包装製品の封止不良検査装置において、上記円筒状の容器の側面に接触して上記容器を強く押圧することなく把持して搬送する一対の搬送する部材と、上記容器の側面が上記搬送する部材により保持された状態で上記天蓋に外圧を加えて、上記容器内圧を高めると共に上記天蓋を緊張状態に保つ天蓋加圧手段と、上記容器の底板に外方より空気を間欠的に複数回吹き付けることで押圧力を複数回間欠的に付与する底板押圧手段と、該底板押圧手段が上記底板を押圧したときの該底板の変位の変化を表す変位波形の特徴点を調べて上記容器包装製品の封止不良を判定する変位波形調査判定手段を有したことを特徴とする。  In a sealing failure inspection device for a container package product in which contents such as snacks are stored in a cylindrical container and the opening is sealed together with gas by a thin film sheet canopy, the side of the cylindrical container is contacted. A pair of conveying members that grip and convey the container without strongly pressing the container, and external pressure is applied to the canopy while the side surface of the container is held by the conveying member to increase the internal pressure of the container. A canopy pressurizing means for maintaining the canopy in a tensioned state, a bottom plate pressing means for intermittently applying a pressing force a plurality of times by intermittently blowing air to the bottom plate of the container from the outside, and the bottom plate pressing means Has a displacement waveform investigation / determination means for examining a characteristic point of a displacement waveform representing a change in displacement of the bottom plate when the bottom plate is pressed to determine a sealing failure of the container packaged product.

請求項３に記載の発明は、請求項２記載の容器包装製品の封止不良検査装置において、  The invention according to claim 3 is the sealing failure inspection device for the container package product according to claim 2,
変位波形調査判定手段が調べる変位波形の特徴点は、変位波形を構成する複数の凸波形の各頂部変位の変化量の平均値と、該各頂部変位の変化量のばらつきとしたことを特徴とする。  The feature points of the displacement waveform investigated by the displacement waveform investigation judging means are the average value of the change amounts of the top displacements of the plurality of convex waveforms constituting the displacement waveform and the variation of the change amounts of the top displacements. To do.

請求項４に記載の発明は、請求項２記載の容器包装製品の封止不良検査装置において、  The invention according to claim 4 is the sealing failure inspection device for the container package product according to claim 2,
変位波形調査判定手段が調べる変位波形の特徴点は、変位波形の初期値と終端値のレベル差としたことを特徴とする。  The feature point of the displacement waveform investigated by the displacement waveform investigation / determination means is characterized by the difference in level between the initial value and the end value of the displacement waveform.

本発明は上記の手段により、複雑な機構を用いることなく、容器の内圧の大小に拘わらず、不良品のみならず、良品をも極めて精度良く判定することができる。   According to the present invention, not only a defective product but also a non-defective product can be determined with high accuracy regardless of the internal pressure of the container without using a complicated mechanism.

本発明者は、従来技術における円筒状容器の開口を封止する薄膜状の天蓋の膨出変位を計測して封止の良否判定を行うことに無理があったと判断し、天蓋を極力膨出させずに膨出量の調査部としてではなく、被加圧部として機能させた。また、封止の良否判定を行うために軽圧下する部位を円筒状容器の円形の底板とすることにより、圧下による歪み変形が偏って生じることなく、等方的になるようにした。
さらに、複数回の圧下変形させたときの変位を時間と共に描いたときの変位波形は良品と不良品とでは明確な相違があることを発見したことに基づいて、この変位波形の特徴点を調べることにより容器包装製品の封止不良を判定した。 The present inventor determined that it was impossible to measure the bulging displacement of the thin-film canopy that seals the opening of the cylindrical container in the prior art to determine the quality of the sealing, and bulge the canopy as much as possible. It was made to function as a to-be-pressed part rather than as a survey part of the amount of bulging. In addition, by making the portion that is lightly reduced to determine the quality of sealing a circular bottom plate of the cylindrical container, distortion deformation due to the reduction is not biased and is isotropic.
Furthermore, based on the fact that the displacement waveform when drawing the displacement under multiple deformations with time is clearly different between the non-defective product and the defective product, the characteristic points of this displacement waveform are examined. Thus, the sealing failure of the container package product was determined.

図１は本発明の容器包装製品封止不良検査装置に係る第１の実施例の正面図、図２は同じく、平面図、図３は同じく、側面図、図４は同じく、封止判定機構の要部を示す構成図、図５は円筒状の容器包装を有した検品７の正面図である。   FIG. 1 is a front view of a first embodiment of a container / package product sealing failure inspection apparatus according to the present invention, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. FIG. 5 is a front view of an inspection 7 having a cylindrical container packaging.

検品７を搬入コンベア５ａ上に載置した状態で搬入させ、一対の側接コンベア３ａ，３ｂで把持して検査位置へと搬送すると共に、搬出コンベア５ｂにより排除装置９側へと排出させるように構成した点は従来技術と同様である。ただし、本実施例では側接コンベア３ａ，３ｂは検品７を強く押圧することなく、殆ど把持搬送の機能だけを有するようにした。   The inspection product 7 is carried in a state of being placed on the carry-in conveyor 5a, is gripped by the pair of side conveyors 3a and 3b, is conveyed to the inspection position, and is discharged to the removal device 9 side by the carry-out conveyor 5b. The point which comprised is the same as that of a prior art. However, in the present embodiment, the side conveyors 3a and 3b have almost only a gripping and conveying function without strongly pressing the inspection product 7.

検品７が検査位置へと搬送されてくると、側接コンベア３ａの略中央側方に配設された計測開始タイミングセンサ８がこれを検知して検知信号を信号処理装置１０の制御部１０ｆに送ると、制御部１０ｆは天蓋押圧装置４に駆動信号を送ってシリンダーを上昇させ、その頂部で検品７の天蓋７ｂを押圧させる。これにより、天蓋７ｂ全面が緊張すると共に、検品７の内圧が上昇する。   When the inspection product 7 is conveyed to the inspection position, the measurement start timing sensor 8 disposed substantially at the center side of the side conveyor 3a detects this, and sends a detection signal to the control unit 10f of the signal processing device 10. When sent, the control unit 10f sends a drive signal to the canopy pressing device 4 to raise the cylinder and press the canopy 7b of the inspection product 7 at the top. As a result, the entire surface of the canopy 7b is tensioned and the internal pressure of the inspection product 7 is increased.

その後、空気間欠押圧装置２からジェット気流が検品７の底板７ａ目がけて数回噴射され、計測センサ１がその間の底板７ａ中央部の変位を計測し続ける。計測センサ１で計測された底板７ａ中央部の変位信号は信号処理装置１０の入力部１０ａに入力され、Ａ／Ｄ変換部１０ｂでアナログ信号がデジタル信号に変換され、信号処理部１０ｃで判定に適した信号になるように処理されて比較部１０ｅに転送される。   Thereafter, the jet air stream is jetted several times from the intermittent air pressing device 2 toward the bottom plate 7a of the inspection product 7, and the measurement sensor 1 continues to measure the displacement of the central portion of the bottom plate 7a. The displacement signal at the center of the bottom plate 7a measured by the measurement sensor 1 is input to the input unit 10a of the signal processing device 10, the analog signal is converted into a digital signal by the A / D conversion unit 10b, and the signal processing unit 10c determines it. The signal is processed to a suitable signal and transferred to the comparison unit 10e.

設定部１０ｄでは後述する閾値のデータや空気間欠押圧装置２からのジェット気流噴射回数等のデータが設定入力される。比較部１０ｅでは計測センサ１で計測された底板７ａ中央部の変位波形の特徴データと設定部１０ｄで入力設定された閾値とが比較され、その結果の判定信号が制御部１０ｆに送られ、制御部１０ｆは判定信号に基づいて操作表示装置１１に底板７ａ中央部の変位波形や判定結果を表示させたり、封止不良検出の判定結果が得られたときは、それを警報装置１２で知らせたり、排除装置９で不良品排出路側に排出させたりする。   In the setting unit 10d, threshold value data and data such as the number of jet air jets from the intermittent air pressing device 2 are set and input. The comparison unit 10e compares the displacement waveform feature data at the center of the bottom plate 7a measured by the measurement sensor 1 with the threshold value input and set by the setting unit 10d, and sends a determination signal as a result to the control unit 10f for control. Based on the determination signal, the unit 10f displays the displacement waveform and the determination result at the center of the bottom plate 7a on the operation display device 11, or notifies the alarm device 12 when the determination result of the sealing failure detection is obtained. Then, the rejection device 9 discharges the defective product to the defective product discharge path side.

図６〜図１０は比較部１０ｅが行う検品７の封止良否判定処理の動作を示した流れ図である。これらの図を参照して上記封止良否判定処理動作の概略を説明する。   6 to 10 are flowcharts showing the operation of the sealing quality determination process of the inspection 7 performed by the comparison unit 10e. The outline of the sealing quality determination processing operation will be described with reference to these drawings.

始めに、操作者が操作表示装置１１の図示しない「コンベア運転」の押し釦スイッチを押すと（Ｓ１）、側接コンベア３ａ，３ｂ、搬入コンベア５ａおよび搬出コンベア５ｂが周回移動し始め、検品７の把持搬送を開始する（Ｓ２）。次に、計測開始タイミングセンサ８が検品７の検査位置への搬送を検知したか否かを判断し（Ｓ３）、その結果が是ならば、制御部１０ｆは側接コンベア３ａ，３ｂ、搬入コンベア５ａおよび搬出コンベア５ｂの周回移動を停止させる（Ｓ４）。   First, when the operator pushes a push button switch of “conveyor operation” (not shown) on the operation display device 11 (S1), the side conveyors 3a and 3b, the carry-in conveyor 5a and the carry-out conveyor 5b begin to move around, and the inspection 7 Is started (S2). Next, it is determined whether or not the measurement start timing sensor 8 detects the conveyance of the inspection item 7 to the inspection position (S3). If the result is correct, the control unit 10f is connected to the side conveyors 3a and 3b and the carry-in conveyor. The circular movement of 5a and carry-out conveyor 5b is stopped (S4).

また、これに同期して、制御部１０ｆは天蓋押圧装置４に駆動信号を送ってシリンダーを上昇させ、その頂部で検品７の天蓋７ｂを押圧させる（Ｓ５）。この後、天蓋押圧装置４に付設された図示しない上点スイッチが頂部の検品７の天蓋７ｂへの当接を検出したか否かを判断する（Ｓ６）。その結果が是となったならば、計測センサ１で計測された底板７ａ中央部の変位信号のデータ受信を開始させると共に（Ｓ７）、空気間欠押圧装置２によるジェット気流の間欠噴射動作を開始させる（Ｓ８）。   In synchronism with this, the control unit 10f sends a drive signal to the canopy pressing device 4 to raise the cylinder and press the canopy 7b of the inspection product 7 at the top (S5). Thereafter, it is determined whether or not an upper point switch (not shown) attached to the canopy pressing device 4 detects the contact of the top inspection item 7 with the canopy 7b (S6). If the result is correct, the data reception of the displacement signal of the center part of the bottom plate 7a measured by the measurement sensor 1 is started (S7), and the intermittent jet operation of the jet stream by the intermittent air press device 2 is started. (S8).

次に、空気間欠押圧装置２からのジェット気流噴射回数が設定部１０ｄで入力設定された設定値に達したか否かを判断する（Ｓ９）。その結果が是となったならば、空気間欠押圧装置２によるジェット気流の間欠噴射動作を停止させると共に（Ｓ１０）、底板７ａ中央部の変位信号のデータ受信を終了させる（Ｓ１１）。   Next, it is determined whether or not the number of jet air current injections from the intermittent air pressing device 2 has reached the set value input and set by the setting unit 10d (S9). If the result is correct, the intermittent jet operation of the jet airflow by the intermittent air pressing device 2 is stopped (S10), and the data reception of the displacement signal at the center of the bottom plate 7a is terminated (S11).

次に、付設された図示しないメモリー内に記憶させた底板７ａ中央部の変位波形のデータを読み出すと共に（Ｓ１２）、標準波形データの閾値となる頂部傾きデータＤＳとばらつきデータＦＳを読み出す（Ｓ１３）。そして、底板７ａ中央部の変位波形を構成する複数の特徴的な凸波形の頂部の平均変位を求める演算した後、それらの凸波形の頂部の各平均変位の間の変化量を求めて、それらの変化量の平均値＜ΔＴｉ＞と、これらの各凸波形の頂部の平均変位の変化量ΔＴｉのばらつき｛ΔＴｔ｝を演算する（Ｓ１４）。   Next, the displacement waveform data of the central portion of the bottom plate 7a stored in the attached memory (not shown) is read (S12), and the top inclination data DS and the variation data FS which are the threshold values of the standard waveform data are read (S13). . And after calculating the average displacement of the tops of a plurality of characteristic convex waveforms constituting the displacement waveform of the central portion of the bottom plate 7a, the amount of change between the average displacements of the tops of those convex waveforms is obtained, A variation {ΔTt} of the average value <ΔTi> of the change amount and the change amount ΔTi of the average displacement at the top of each convex waveform is calculated (S14).

そして、演算した連続する凸波形の頂部の平均変位の変化量、即ち、平均変位の偏差の平均値＜ΔＴｉ＞と頂部傾きデータＤＳとを比較すると共に、各々の凸波形の平均変位変化量ΔＴｉのばらつき｛ΔＴｔ｝と、ばらつきデータＦＳとを比較し、ＤＳ≦＜ΔＴｉ＞およびＦＳ≦｛ΔＴｔ｝が共に成立するか否かを判断する（Ｓ１５）。   Then, the change amount of the average displacement at the top of the calculated continuous convex waveform, ie, the average value <ΔTi> of the deviation of the average displacement is compared with the top slope data DS, and the average displacement change amount ΔTi of each convex waveform. Is compared with the variation data FS to determine whether DS ≦ <ΔTi> and FS ≦ {ΔTt} are both satisfied (S15).

その結果が否ならば手順Ｓ１６に進み、是ならば手順Ｓ１９に進むが、何れの手順でも天蓋押圧装置４の頂部の下降を開始させた後、天蓋押圧装置４に付設された図示しない下点スイッチが頂部の所定下降位置までの下降を検出したか否かを判断する（Ｓ１７，Ｓ２０）。その結果が是ならば、側接コンベア３ａ，３ｂ、搬入コンベア５ａおよび搬出コンベア５ｂの周回移動を開始させる（Ｓ１８，Ｓ２１）。   If the result is negative, the procedure proceeds to step S16, and if yes, the procedure proceeds to step S19. In any procedure, after the top of the canopy pressing device 4 starts to descend, a lower point (not shown) attached to the canopy pressing device 4 is displayed. It is determined whether or not the switch has detected a descent of the top to a predetermined descent position (S17, S20). If the result is correct, the circumferential movement of the side conveyors 3a, 3b, the carry-in conveyor 5a, and the carry-out conveyor 5b is started (S18, S21).

図１０に移って、手順Ｓ２２に至ったときは、排除装置９を動作させる時刻に到達したか否かを判断し、その結果が是となったならば、排除装置９を動作させてジェット気流噴射により不良品を良品排出経路より排除させる（Ｓ２３）。   Turning to FIG. 10, when the process reaches step S <b> 22, it is determined whether or not the time for operating the rejecting device 9 has been reached. Defective products are removed from the non-defective product discharge route by the injection (S23).

Ｓ１８またはＳ２３の手順が終了したなら、操作者が操作表示装置１１の図示しない「コンベア停止」の押し釦スイッチを押したか否かを判断し、その結果が是ならば、側接コンベア３ａ，３ｂ、搬入コンベア５ａおよび搬出コンベア５ｂの周回移動を停止させて（Ｓ２５）、封止良否判定処理動作を終了する。   When the procedure of S18 or S23 is completed, it is determined whether or not the operator has pushed a “conveyor stop” push button switch (not shown) of the operation display device 11. If the result is correct, the side conveyors 3a and 3b are determined. Then, the circular movement of the carry-in conveyor 5a and the carry-out conveyor 5b is stopped (S25), and the sealing quality determination processing operation is finished.

図１２〜図１５は本実施例に係る操作表示装置１１に表示された底板７ａ中央部の変位波形の例を示したものであり、図１２は良品と判定されたもの、他の図に示されたものは不良品と判定されたものである。これらの図を参照すれば、上述の封止良否判定処理で行った判定が理に適ったものであることが判る。   12 to 15 show examples of displacement waveforms at the center of the bottom plate 7a displayed on the operation display device 11 according to the present embodiment. FIG. 12 shows what is determined to be non-defective, and is shown in other drawings. What has been determined is a defective product. Referring to these figures, it can be seen that the determination made in the sealing quality determination process described above is reasonable.

図１６、図１７は上述の封止良否判定処理において計測された測定値、演算値およびそれらに基づく判定結果の実例を示す表図である。これらの表図から、本実施例による封止良否判定の精度が極めて高いことが判る。   16 and 17 are table diagrams showing actual examples of measured values, calculated values, and determination results based on the measurement values measured in the sealing quality determination process described above. From these charts, it can be seen that the accuracy of the sealing quality determination according to the present embodiment is extremely high.

上述の実施例では、検品７の底板７ａ中央部の変位波形を構成する複数の凸波形の頂部の特徴に注目して封止の良否判定を行ったが、複数の凸波形の初期値と終端値に注目して、それらの値を比較することにより検品７の封止の良否判定を行うこともできる。図１１は本発明の第２の実施例に係る封止良否判定処理の流れ図の要部を示したものである。即ち、この図は第１の実施例の流れ図の中、図８に相当する処理を表したものであり、この処理動作以外の処理は第１の実施例のものと同じである。   In the above-described embodiment, the quality of the sealing is determined by paying attention to the features of the tops of the plurality of convex waveforms constituting the displacement waveform of the center portion of the bottom plate 7a of the inspection product 7. By paying attention to the values and comparing these values, it is possible to determine whether the inspection 7 is sealed or not. FIG. 11 shows a main part of a flow chart of the sealing quality determination processing according to the second embodiment of the present invention. That is, this figure shows the processing corresponding to FIG. 8 in the flowchart of the first embodiment, and the processing other than this processing operation is the same as that of the first embodiment.

この例では、手順Ｓ１１の処理が終了したならば、底板７ａ中央部の変位波形のデータを読み出すと共に（Ｓ２６）、標準波形データの初期値と終端値の閾値となる初期値と終端値の基準変位レベル差データＤＳＥを読み出す（Ｓ２７）。次に、底板７ａ中央部の変位波形の初期値と終端値の変位レベル差を表す変位レベル差分データＤｓｅを演算し（Ｓ２８）、次の手順Ｓ２９で変位レベル差分データＤｓｅは基準変位レベル差データＤＳＥ以上か否かを判断する。以下の動作は第１の実施例のものと同じである。   In this example, when the process of step S11 is completed, the displacement waveform data at the center of the bottom plate 7a is read (S26), and the initial value and the reference value of the end value are used as threshold values for the initial value and the end value of the standard waveform data. The displacement level difference data DSE is read (S27). Next, displacement level difference data Dse representing the displacement level difference between the initial value and the end value of the displacement waveform at the center of the bottom plate 7a is calculated (S28), and the displacement level difference data Dse is the reference displacement level difference data in the next step S29. It is determined whether or not it is greater than DSE. The following operations are the same as those in the first embodiment.

図１８は本発明の第２の実施例により封止の良否判定を行った際の測定値、演算値およびそれらに基づく判定結果の実例を示す表図である。この表図から、本実施例においても検品７の封止良否判定の精度が極めて高いことが判る。   FIG. 18 is a table showing actual values of measured values, calculated values, and determination results based on them when performing sealing quality determination according to the second embodiment of the present invention. From this table, it can be seen that also in this embodiment, the accuracy of the sealing quality determination of the inspection product 7 is extremely high.

本発明の容器包装製品封止不良検査装置に係る第１の実施例の正面図The front view of the 1st Example which concerns on the container packaging product sealing defect inspection apparatus of this invention 同じく、平面図Similarly, top view 同じく、側面図Similarly, side view 同じく、封止判定機構の要部を示す構成図Similarly, the block diagram which shows the principal part of a sealing determination mechanism 検品の正面図Front view of inspection 第１の実施例に係る検品の封止良否判定処理の動作を示した流れ図The flowchart which showed the operation | movement of the sealing quality determination process of the inspection which concerns on 1st Example 同じく、図６に続く流れ図Similarly, the flowchart following FIG. 同じく、図７に続く流れ図Similarly, the flowchart following FIG. 同じく、図８に続く流れ図Similarly, the flowchart following FIG. 同じく、図９に続く流れ図Similarly, the flowchart following FIG. 本発明の第２の実施例に係る封止良否判定処理の要部流れ図Main part flow chart of sealing quality determination processing according to the second embodiment of the present invention 第１の実施例に係る底板中央部の変位波形を例示した波形図The wave form diagram which illustrated the displacement waveform of the baseplate center part which concerns on 1st Example 同じく、他の波形図Similarly, other waveform diagrams 同じく、他の波形図Similarly, other waveform diagrams 同じく、他の波形図Similarly, other waveform diagrams 同じく、封止良否判定処理を行った結果を示す表図Similarly, a table showing the results of sealing quality determination processing 同じく、封止良否判定処理を行った結果を示す表図Similarly, a table showing the results of sealing quality determination processing 本発明の第２の実施例について良否判定を行った結果を示す表図The table which shows the result of having performed quality determination about 2nd Example of this invention 従来技術を模した試作機の概要を示す正面図Front view showing the outline of a prototype that mimics the prior art 同じく、検品について良否判定を行った結果を示す表図Similarly, a chart showing the results of pass / fail judgment for inspections

１ 計測センサ
２ 空気間欠押圧装置
３ａ，３ｂ 側接コンベア
４ 天蓋押圧装置
５ａ 搬入コンベア
５ｂ 搬出コンベア
７ 検品
９ 排除装置
１０ 信号処理装置 DESCRIPTION OF SYMBOLS 1 Measurement sensor 2 Air intermittent press apparatus 3a, 3b Side contact conveyor 4 Canopy press apparatus 5a Carry-in conveyor 5b Carry-out conveyor 7 Inspection 9 Exclusion apparatus 10 Signal processing apparatus

Claims (4)

円筒状の容器内にスナック菓子等の内容物を収納し、薄膜シート状の天蓋で気体と共に開口部を封止した容器包装製品の封止不良検査方法において、上記容器の側面が一対の部材で強く押圧されることなく把持された状態で上記天蓋に外圧を加えて、上記容器内圧を高めると共に上記天蓋を緊張状態に保ちつつ、上記容器の底板に外方より空気を間欠的に複数回吹き付けることで押圧力を複数回間欠的に付与したときの該底板の変位の変化を表す変位波形の特徴点を調べて上記容器包装製品の封止不良を判定したことを特徴とする容器包装製品の封止不良検査方法。 In a sealing failure inspection method for a container packaged product in which contents such as snacks are stored in a cylindrical container and the opening is sealed together with gas with a thin film sheet canopy, the side surfaces of the container are strongly bonded by a pair of members. Applying external pressure to the canopy in a gripped state without being pressed to increase the internal pressure of the container and keep the canopy in tension, while intermittently blowing air to the bottom plate of the container multiple times from the outside in sealed packaging product by examining the feature points of the displacement waveform representing the variation of the displacement of the bottom plate when the pressing force was several times intermittently applied, characterized in that to determine the defective sealing of the packaging products Stop defect inspection method. 円筒状の容器内にスナック菓子等の内容物を収納し、薄膜シート状の天蓋で気体と共に開口部を封止した容器包装製品の封止不良検査装置において、上記円筒状の容器の側面に接触して上記容器を強く押圧することなく把持して搬送する一対の搬送する部材と、上記容器の側面が上記搬送する部材により保持された状態で上記天蓋に外圧を加えて、上記容器内圧を高めると共に上記天蓋を緊張状態に保つ天蓋加圧手段と、上記容器の底板に外方より空気を間欠的に複数回吹き付けることで押圧力を複数回間欠的に付与する底板押圧手段と、該底板押圧手段が上記底板を押圧したときの該底板の変位の変化を表す変位波形の特徴点を調べて上記容器包装製品の封止不良を判定する変位波形調査判定手段を有したことを特徴とする容器包装製品の封止不良検査装置。 In a sealing failure inspection device for a container package product in which contents such as snacks are stored in a cylindrical container and the opening is sealed together with gas by a thin film sheet canopy, the side of the cylindrical container is contacted. A pair of conveying members that grip and convey the container without strongly pressing the container, and external pressure is applied to the canopy while the side surface of the container is held by the conveying member to increase the internal pressure of the container. A canopy pressurizing means for maintaining the canopy in a tensioned state, a bottom plate pressing means for intermittently applying a pressing force a plurality of times by intermittently blowing air to the bottom plate of the container from the outside, and the bottom plate pressing means A container packaging having a displacement waveform investigation / determination means for examining a feature point of a displacement waveform representing a change in displacement of the bottom plate when the bottom plate is pressed to determine a sealing failure of the container package product. Product Stop failure inspection apparatus. 変位波形調査判定手段が調べる変位波形の特徴点は、変位波形を構成する複数の凸波形の各頂部変位の変化量の平均値と、該各頂部変位の変化量のばらつきとしたことを特徴とする請求項２記載の容器包装製品の封止不良検査装置。   The feature points of the displacement waveform investigated by the displacement waveform investigation judging means are the average value of the change amounts of the top displacements of the plurality of convex waveforms constituting the displacement waveform and the variation of the change amounts of the top displacements. An apparatus for inspecting sealing failure of a container packaged product according to claim 2. 変位波形調査判定手段が調べる変位波形の特徴点は、変位波形の初期値と終端値のレベル差としたことを特徴とする請求項２記載の容器包装製品の封止不良検査装置。   3. A sealing failure inspection device for a container packaged product according to claim 2, wherein the feature point of the displacement waveform checked by the displacement waveform check determining means is a level difference between the initial value and the terminal value of the displacement waveform.
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