JPH09196804A - Leak checker for paper container - Google Patents

Leak checker for paper container

Info

Publication number
JPH09196804A
JPH09196804A JP2490696A JP2490696A JPH09196804A JP H09196804 A JPH09196804 A JP H09196804A JP 2490696 A JP2490696 A JP 2490696A JP 2490696 A JP2490696 A JP 2490696A JP H09196804 A JPH09196804 A JP H09196804A
Authority
JP
Japan
Prior art keywords
paper container
closed space
air
holder
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2490696A
Other languages
Japanese (ja)
Inventor
Takuya Adachi
卓也 足立
Takahisa Hirayama
隆久 平山
Yoshiki Arita
芳樹 有田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP2490696A priority Critical patent/JPH09196804A/en
Publication of JPH09196804A publication Critical patent/JPH09196804A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To eliminate a wrong judge at the time of leak check, and to enable the measurement in a short time by measuring the swelled amount of a bottom part on the basis of the existence of the intrusion of air into a container through a pin hole. SOLUTION: When an upper part of a paper container (a) is covered by a holder 2, a pressurizing means 4 supplies air to a closed space 3 and pressurized to a predetermined constant pressure condition, and thereafter, the pressurizing means 4 maintains this constant pressure condition for a predetermined time. When the pressure of the closed space 3 formed by the holder 2 is raised to be under constant pressure condition by the pressurizing means 4, a measuring means 7 measures the downward expanded variable of an air bottom plate (f). The difference of the inner pressure of the paper container (a) is remarkably large between the case where air is fed into the paper container (a) from the closed space 3, in which a pin hole is generated in a heat seal closing part, and the case where the air is fed into the paper container (a) from the closed space 3, in which a pin hole is not generated. A judging means 8 compares the measured value of the measuring means 7, namely, the expanded amount with a preset value so as to judge the quality of the paper container (a).

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は飲料などの液体を収
容した紙容器の封止状態を確認するリークチェッカーに
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leak checker for checking the sealed state of a paper container containing a liquid such as a beverage.

【0002】[0002]

【発明が解決しようとする課題】従来からお酒やジュー
スなどの飲料、そして、油などの工業製品としての液体
を収容する容器の一つとして、廃棄処分が容易な紙容器
がある。図5に示すように、これらの紙容器aにあって
は、一枚のフランクスを組み起こして全体形状を四角柱
状とし上部を切り妻型としたゲーベルトップと称される
もの(ア)や、筒状の紙管の上下に共締めなどにより上
板、底板とを配した缶状のもの(イ)などがあり、前記
ゲーベルトップと称される紙容器にあっては上部開放部
分から内容物を充填した後に上部開放部分を折り込んで
ヒートシールにより封止しており、また、前記缶状と紙
容器にあっても、上板の予め開放されている注出口から
内容物を充填した後にタブにて注出口を覆い上板にヒー
トシールして注出口を封止するようにしている。このよ
うな内容物を充填した後に容器上部をヒートシールして
閉鎖したり、充填口となった注出口をタブによりヒート
シールした紙容器では、そのヒートシールの際に何らか
の原因によりヒートシール閉鎖部にピンホールが生じ、
その紙容器の流通時点などでヒートシール閉鎖部から液
漏れが発生する可能性があるため、従来ではヒートシー
ル閉鎖部にピンホールが発生しているかどうかの検査を
行うようにしている。
As one of the conventional containers for storing drinks such as alcohol and juice and liquids such as oil as industrial products, there is a paper container that can be easily disposed of. As shown in FIG. 5, in these paper containers a, what is called a gobel top (a) in which a single piece of Franks is assembled to form a square column shape and the upper part is a gable type, There is a can-like (a) in which a top plate and a bottom plate are arranged by tightening together on the top and bottom of a tubular paper tube. In the paper container called the Gobel top, the contents are opened from the top open part. After filling, the upper open part is folded and sealed by heat sealing.Also, in the case of the can and the paper container, the tab after filling the contents from the pre-opened spout of the upper plate In order to cover the spout, the upper plate is heat-sealed to seal the spout. In a paper container in which the upper part of the container is heat-sealed and closed after filling with such contents, or the spout that has become the filling port is heat-sealed with a tab, the heat-seal closure part is caused by some cause during the heat-sealing. Pinholes occur in
Since there is a possibility that liquid will leak from the heat-seal closed part at the time of distribution of the paper container, it has been conventionally conducted to inspect whether the heat-sealed closed part has pinholes.

【0003】この検査には特開平2−232544号公
報などに示されているように、一定の外圧を容器の外面
に付与した後、その圧力の時間的変化の度合いによって
ヒートシールの良否を判定するようにしたものがあり、
図6にはその一例を示している。図において、1は缶状
の紙容器aに対応したリークチェッカーであり、このリ
ークチェッカー1は、紙容器aの上板bに形成されてい
るヒートシール閉鎖部c(即ち、注出口dをタブeで覆
ってヒートシールした部分)を含む紙容器の上部を覆う
ホルダー2を有していて、このホルダー2にて紙容器a
の上部を覆うことで閉鎖空間3を形成できるようにして
いる。そして、前記ホルダー2には加圧手段4が接続さ
れていて、前記閉鎖空間3に空気を送り込んで閉鎖空間
3を定圧状態に保つことができるように設けられている
とともに、前記閉鎖空間3の圧力状態を検知できる計測
手段5が接続されている。図7の時間に伴う閉鎖空間の
圧力変化で示されているように、前記加圧手段4は閉鎖
空間3が所定の一定圧になるまで空気の供給圧を高め
(A)、閉鎖空間3が所定の一定圧になった時点で定圧
の空気を送りながら閉鎖空間を定圧状態に一定時間、維
持する(B)ように動作するものであり、一定時間が経
た後に空気の供給を停止する。なお、定圧の空気を送り
ながら閉鎖空間を定圧状態にする点は、ホルダーと紙容
器との接触部分からの空気漏れが生じるためである。そ
して、定圧状態の維持が終了した後の閉鎖空間の減圧度
合いが前記計測手段5に計測され、予め設定された減圧
度合いより大きく変圧する状態(C:不良減圧)がこの
計測手段5により計測された場合には、ヒートシールの
不良として判定し、予め設定された減圧度合いで、或い
は設定減圧度合いより緩やかに変圧する状態(D:適正
減圧)がこの計測手段5により計測された場合には、ヒ
ートシールの良として判定するようにしていた。また、
前記加圧手段に代えて減圧手段をホルダーに接続し、定
圧状態後の昇圧度合いを計測して良否を判定することも
行われていた。
In this inspection, as disclosed in Japanese Patent Laid-Open No. 232544/1990, after applying a constant external pressure to the outer surface of the container, the quality of heat sealing is judged by the degree of temporal change of the pressure. There are things I tried to do,
FIG. 6 shows an example thereof. In the figure, 1 is a leak checker corresponding to a can-shaped paper container a, and this leak checker 1 has a heat-seal closing part c (that is, a spout d a holder 2 for covering the upper part of a paper container including a portion which is covered with e and heat-sealed).
The closed space 3 can be formed by covering the upper part of the. A pressurizing means 4 is connected to the holder 2 so that air can be sent into the closed space 3 to keep the closed space 3 in a constant pressure state. Measuring means 5 capable of detecting the pressure state is connected. As shown by the pressure change in the closed space with time in FIG. 7, the pressurizing means 4 increases the air supply pressure until the closed space 3 reaches a predetermined constant pressure (A), and the closed space 3 becomes It operates so as to maintain the closed space in a constant pressure state for a certain time while sending air at a constant pressure when the pressure reaches a predetermined constant pressure (B), and stops the supply of air after a certain time elapses. The reason why the closed space is kept in a constant pressure state while sending constant pressure air is that air leakage occurs from the contact portion between the holder and the paper container. Then, the degree of decompression of the closed space after the maintenance of the constant pressure state is completed is measured by the measuring means 5, and the state in which the pressure is changed to a degree larger than the preset degree of decompression (C: defective reduced pressure) is measured by the measuring means 5. If it is determined that the heat sealing is defective, and the state (D: proper pressure reduction) at which the pressure reduction degree is set in advance or is gentler than the set pressure reduction degree is measured by the measuring means 5, It was judged as good heat seal. Also,
Instead of the pressurizing means, a depressurizing means is connected to the holder, and the degree of pressurization after the constant pressure state is measured to judge the quality.

【0004】しかしながら、定圧状態を一定時間維持す
る上記リークチェッカーでは、現状においてその維持時
間が2〜3秒程度と長く必要で、かつ、圧力変化を生じ
させるための時間も必要なために一つの紙容器に対して
要する判定のための時間が長くなり、複数の紙容器に対
して連続的にヒートシールの良否を判定できるように複
数のリークチェッカーから構成した連続装置ではその連
続装置自体が大型化すうという問題がある。また、圧力
変化を計測するため、微小圧力変化に対応する高感度の
圧力計が必要となって設備費を押し上げているととも
に、圧力のどのような変化を境として良否を分けるかの
判定基準の設定が非常に難しく、誤判定を招く原因とな
っていた。そこで本発明は上記事情に鑑みて、一つの紙
容器当たりに要する判定のための時間を短くするととも
に、明確な基準にて良否を判定できるようにすることを
課題とし、複数のリークチェッカーよりなる連続装置の
小型化を図り、紙容器製品の流通時点での液漏れを無く
すことを目的とする。
However, the above-mentioned leak checker which maintains a constant pressure state for a certain period of time requires a long maintaining time of about 2 to 3 seconds under the present circumstances, and requires a time for causing a pressure change. It takes a long time to make judgments for paper containers, and in a continuous device composed of multiple leak checkers so that it is possible to continuously judge the quality of heat sealing for multiple paper containers, the continuous device itself is large. There is a problem that it will change. In addition, since pressure changes are measured, a highly sensitive pressure gauge that responds to minute pressure changes is required, increasing equipment costs, and a change in pressure is used as a criterion for determining whether the pressure is good or bad. It was very difficult to set, and it was a cause of erroneous judgment. Therefore, in view of the above circumstances, the present invention has an object to shorten the time required for determination for one paper container and to determine pass / fail based on a clear reference, and includes a plurality of leak checkers. The objective is to reduce the size of the continuous device and eliminate liquid leakage at the time of distribution of paper container products.

【0005】[0005]

【課題を解決するための手段】本発明は上記課題を解消
するためになされたもので、閉鎖されたヒートシール閉
鎖部を含む紙容器の上部を覆い、この覆われた紙容器の
上部とで閉鎖空間を形成するホルダーと、前記ホルダー
に接続されて前記閉鎖空間に空気を供給して定圧状態に
保ち、ホルダーに覆われた紙容器の上部の表面に均一に
外圧を付与する加圧手段と、前記加圧手段の外力付与に
よる紙容器の底部の膨出量を接触又は非接触で計測する
計測手段と、前記計測手段により計測された前記底部の
膨出量が予め設定された許容値より大きい否かを判定し
判定結果を出力する判定手段とを備えることを特徴とす
る紙容器のリークチェッカーを提供して、上記課題を解
消するものである。
The present invention has been made to solve the above-mentioned problems, and covers the upper part of a paper container including a closed heat-seal closing portion, and the upper part of the covered paper container. A holder that forms a closed space; and a pressurizing unit that is connected to the holder to supply air to the closed space to maintain a constant pressure and to apply external pressure evenly to the upper surface of the paper container covered by the holder. The measuring means for measuring the bulging amount of the bottom portion of the paper container by applying the external force of the pressurizing means in contact or non-contact, and the bulging amount of the bottom portion measured by the measuring means are more than a preset allowable value. A leak checker for a paper container is provided, which is provided with a determination unit that determines whether or not it is large and outputs a determination result, and solves the above problem.

【0006】本発明においては、紙容器の頂辺シール部
や注出口をタブにて覆ってなる開封予定部などのヒート
シール閉鎖部を含む上部をホルダーにて覆い、加圧手段
により閉鎖空間の圧力を高めて前記上部に対して空気圧
による外力を均一に加えるようにしている。上記閉鎖空
間の圧力が高まめられても、上記ヒートシール閉鎖部に
おいてピンホールが生じていない場合には紙容器の内圧
が高まらず、紙容器の底部は下方に放出変形することが
ない。また、ピンホールが存在しない状態で紙容器の上
部が凹んででも、紙容器の内圧が僅かに高まるにとどま
って紙容器の底部の膨出量は非常に小さいものとなる。
そして、ヒートシール閉鎖部にピンホールが存在する場
合には、圧力が高められた圧縮空間から空気が紙容器内
に侵入し、そのために紙容器の内圧が上昇して底部が下
方に膨出するようになる。上記計測手段は前記紙容器の
底部の膨出量を計測しており、判定手段は計測された前
記膨出量を設定値と比較して設定値より膨出量が大きい
場合には不良とし、設定値以下の場合には良として判定
するものであり、ピンホールがヒートシール閉鎖部に生
じていて閉鎖空間から空気が紙容器内に送り込まれる場
合と、ピンホールがなく閉鎖空間から空気が紙容器内に
送り込まれない場合とでは、紙容器の内圧の違いが極め
て大きく、よって、紙容器底部の膨出量も両者の場合で
大きく異なり、判定の良否を分ける基準が設定し易いも
のとなる。
In the present invention, the top part including the heat seal closing part such as the opening side sealing part where the top side sealing part and the spout of the paper container are covered with the tab is covered with the holder, and the closed space is closed by the pressurizing means. The pressure is increased so that an external force due to air pressure is uniformly applied to the upper portion. Even if the pressure in the closed space is increased, the internal pressure of the paper container does not increase and the bottom of the paper container is not discharged and deformed downward unless pinholes are formed in the heat seal closed portion. Further, even if the top of the paper container is dented in the absence of pinholes, the internal pressure of the paper container is only slightly increased, and the amount of bulging at the bottom of the paper container is very small.
When there is a pinhole in the heat-seal closing portion, air enters the paper container from the compressed space where the pressure is increased, and therefore the internal pressure of the paper container rises and the bottom part bulges downward. Like The measuring means measures the bulging amount of the bottom of the paper container, and the determining means compares the measured bulging amount with a set value and determines that the bulging amount is larger than the set value, and determines that the bulging amount is defective. If it is less than the set value, it is judged as good.When there is a pinhole in the heat seal closed part and air is sent into the paper container from the closed space, and when there is no pinhole and air is drawn from the closed space to the paper. The difference in the internal pressure of the paper container is very large when it is not fed into the container, so the bulging amount of the bottom of the paper container is also greatly different in both cases, and it becomes easy to set the criterion for judging the quality of the judgment. .

【0007】[0007]

【発明の実施の形態】つぎに本発明を図1から図4に示
す実施の形態に基づいて詳細に説明する。なお、従来例
と構成が重複する部分は同符号を付してその説明を省略
する。図1は従来例と同様に缶状として上板bにヒート
シール閉鎖部cを備えている紙容器aに対応した本発明
のリークチェッカー1を示すものであり、載置台6に配
置された前記紙容器aの上部、即ち、ヒートシール閉鎖
部cを含む上板bを覆うホルダー2に対して、このホル
ダー2により紙容器の上部を覆って形成された閉鎖空間
3に対して空気を送り込む加圧手段4が接続されてお
り、この加圧手段4は前記ホルダー2が紙容器の上部を
覆うと、空気を閉鎖空間3に供給して所定の定圧状態に
なるまで加圧した後、その定圧状態を所定時間保ち、ホ
ルダー2に覆われた紙容器の上部の表面に均一に外圧を
付与するようにしている。
BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail based on the embodiments shown in FIGS. In addition, the same reference numerals are given to portions having the same configuration as the conventional example, and the description thereof will be omitted. FIG. 1 shows a leak checker 1 according to the present invention corresponding to a paper container a having a can-like upper plate b and a heat-seal closing portion c as in the conventional example. The leak checker 1 is arranged on a mounting table 6. With respect to the holder 2 that covers the upper part of the paper container a, that is, the upper plate b including the heat-seal closing part c, air is sent into the closed space 3 formed by the holder 2 to cover the upper part of the paper container. A pressure means 4 is connected, and when the holder 2 covers the upper part of the paper container, the pressure means 4 supplies air to the closed space 3 and pressurizes it until a predetermined constant pressure state is reached, and then the constant pressure is applied. The state is maintained for a predetermined time, and external pressure is uniformly applied to the upper surface of the paper container covered with the holder 2.

【0008】また、本発明のリークチェッカー1にあっ
ては、紙容器aの底部、即ち、底板fに相対するように
して上記載置台6に設けた開口内に計測手段7を配置さ
せている。この計測手段7は光学的距離センサーからな
るもので、底板fにおけるセンサーとの対応位置までの
距離を非接触にて計測できるようにしたものであり、上
記ホルダー2による閉鎖空間3が上記加圧手段4により
一定の定圧状態に昇圧された時に、その底板fの下方へ
の膨出量を計測するようにしている。そして、この計測
手段7には判定手段8が電気的に接続されている。この
判定手段8では、前記計測手段7が計測して出力した計
測値、即ち、膨出量を、予め設定されている値と比較
し、その設定値より膨出量が大きい場合には不良とし、
その膨出量が設定値以下である場合には良として判定結
果を、例えば後述の不良排出装置などに出力するように
設けられているものである。即ち、判定手段8による判
定結果としての出力は、計測後の紙容器中、不良と判定
されたものを除去するための装置に入力される。
Further, in the leak checker 1 of the present invention, the measuring means 7 is arranged in the bottom portion of the paper container a, that is, in the opening provided in the mounting table 6 so as to face the bottom plate f. . The measuring means 7 is composed of an optical distance sensor and is adapted to measure the distance to the position corresponding to the sensor on the bottom plate f in a non-contact manner. When the pressure is increased to a constant pressure by the means 4, the downward expansion amount of the bottom plate f is measured. The determining means 8 is electrically connected to the measuring means 7. The determination unit 8 compares the measured value output by the measuring unit 7, that is, the bulge amount, with a preset value, and if the bulge amount is larger than the set value, it is determined to be defective. ,
When the bulge amount is less than or equal to the set value, the determination result is determined to be good, and the determination result is output to, for example, a defective discharge device described later. That is, the output as the determination result by the determination unit 8 is input to the device for removing the defective paper container after the measurement.

【0009】このように、リークチェッカー1では閉鎖
空間3の空気圧を所定の圧力まで昇圧させることで、ヒ
ートシール閉鎖部にピンホールが生じていた場合には閉
鎖空間から紙容器の内部に空気が入り込んで紙容器の底
部が下方に膨出するようになり、また、紙容器の内部に
加圧空気が入り込んで紙容器底部を膨出させるため、そ
の膨出量が大きく、よって、許容される膨出量と不良と
判定すべき膨出量との差が大きく、良否の判定基準が容
易に設定できるようになる。
As described above, in the leak checker 1, the air pressure in the closed space 3 is increased to a predetermined pressure so that when a pinhole is formed in the heat seal closed portion, air is introduced from the closed space into the paper container. Since the bottom of the paper container bulges downward when it enters, and the pressurized air enters the interior of the paper container to bulge the bottom of the paper container, the bulge amount is large, and therefore, it is allowed. There is a large difference between the bulge amount and the bulge amount that should be determined to be defective, and it becomes possible to easily set the criterion for determining the quality.

【0010】図2は列をなして連続的に供給される複数
の紙容器に対して順次連続的に上記のリーク判定を行え
るように、上記構造の複数台のリークチェッカーを環状
に配置した連続装置9を示していて、この連続装置9
は、紙容器aを一列にして送り出すライン10の途中に
介装され、ライン10の下流側には、前記リークチェッ
カーの判定手段により不良と判定された紙容器をライン
10から取り除く不良排出装置11が配置されている。
なお、説明を容易にするため、図2においてはリークチ
ェッカーを図示していていない。連続装置9では回転部
12の周囲に形成された複数の受け部13に順次紙容器
が保持され、各受け部13にて設けられているリークチ
ェッカーが、(ア)の段階では、図3に示すように上記
ホルダー2と載置台6とで紙容器aを保持し、(イ)の
段階では加圧手段により閉鎖空間に0.1〜0.15K
gf/cm2 の圧力にて空気を供給し、(ウ)、(エ)
の段階では閉鎖空間を定圧状態に維持し、(オ)の段階
では図4に示すように、計測手段7で膨出量を計測し、
計測したその紙容器に対する良否の判定と判定結果の出
力を行い(閉鎖空間は定圧状態を維持)、(カ)の段階
で紙容器を解放しており、解放された紙容器はライン1
0に送り出されるようにしている。そして、上述したよ
うに下流のラインを移動する紙容器のうち、不良と判定
された紙容器に対しては紙容器が不良排出装置11の前
方に移動してきた時点でこの不良排出装置11により除
去されるようにしている。なお、上記した実施の形態に
あっては、計測手段を光学的距離センサーによる非接触
のものとしたが、紙容器の底部の膨出量を計測する方法
として接触式のものであってもよい。また、缶状の紙容
器に対するリークチェッカーを例示したが、本発明はこ
れに限定されるものではなく、ゲーベルトップ型の紙容
器に対しても実施できるものである。そして、閉鎖空間
に送り込まれる気体として空気を例示したが、窒素ガス
などの不活性ガスを利用することも可能である。
FIG. 2 is a continuous view in which a plurality of leak checkers having the above-mentioned structure are arranged in an annular shape so that the above-mentioned leak determination can be successively and successively performed on a plurality of paper containers which are continuously supplied in a row. Shown is the device 9 and the continuous device 9
Is interposed in the middle of a line 10 for feeding the paper containers a in a line, and a defective discharge device 11 for removing from the line 10 a paper container determined to be defective by the leak checker determination means on the downstream side of the line 10. Are arranged.
Note that the leak checker is not shown in FIG. 2 for ease of explanation. In the continuous device 9, the paper containers are sequentially held in the plurality of receiving portions 13 formed around the rotating portion 12, and the leak checker provided in each receiving portion 13 is shown in FIG. As shown, the holder 2 and the mounting table 6 hold the paper container a, and in the step (a), 0.1 to 0.15K is added to the closed space by the pressing means.
Air is supplied at a pressure of gf / cm 2 , and (c) and (d)
In the stage of (3), the closed space is maintained at a constant pressure state, and in the stage of (E), the swelling amount is measured by the measuring means 7 as shown in FIG.
The quality of the measured paper container is judged and the judgment result is output (the closed space maintains a constant pressure state), and the paper container is released at the stage of (f), and the released paper container is line 1
I am trying to send it to 0. Then, as described above, among the paper containers moving on the downstream line, the paper containers that are determined to be defective are removed by the defective discharge device 11 when the paper container moves to the front of the defective discharge device 11. I am trying to do it. In the above-described embodiment, the measuring means is a non-contact type using an optical distance sensor, but a contact type may be used as a method for measuring the bulging amount of the bottom of the paper container. . Further, although the leak checker for the can-shaped paper container has been illustrated, the present invention is not limited to this and can be implemented for a gobel-top paper container. Although air has been illustrated as the gas sent into the closed space, an inert gas such as nitrogen gas can be used.

【0011】[0011]

【発明の効果】以上説明したように、本発明の紙容器の
リークチェッカーによれば、閉鎖されたヒートシール閉
鎖部を含む紙容器の上部を覆い、この覆われた紙容器の
上部とで閉鎖空間を形成するホルダーと、前記ホルダー
に接続されて前記閉鎖空間に空気を供給して定圧状態に
保ち、ホルダーに覆われた紙容器の上部の表面に均一に
外圧を付与する加圧手段と、前記加圧手段の外力付与に
よる紙容器の底部の膨出量を接触又は非接触で計測する
計測手段と、前記計測手段により計測された前記底部の
膨出量が予め設定された値より大きい否かを判定し判定
結果を出力する判定手段とを備えることを特徴とするも
のである。このように、本発明では、紙容器の頂部にお
けるシール部分や注出口をタブにて覆ってなる開封予定
部などのヒートシール閉鎖部を、上記ホルダーにて覆っ
てなる閉鎖空間の内部に位置させるようにし、この閉鎖
空間の圧力を高めて前記上部に対して空気圧による外力
を均一に加えるように加圧手段を備え、この加圧手段で
前記閉鎖空間を昇圧させたことによる紙容器底部の膨出
量を計測手段にて計測するようにしており、そして、ピ
ンホールを通して容器内方に空気が侵入した場合の底部
の膨出量と侵入しない場合の底部の膨出量との差が大き
く、この差の出易い底部の膨出を前記計測手段にて計測
するようにしているため、良否を分ける基準が設定し易
くなり、リークチェックの誤判定を無くすことができ
る。また、底部の膨出量を計測するようにしているた
め、従来の閉鎖空間の変圧状態を計測する方法に比べて
計測が短時間で済むようになり、よって、判定までの時
間が短くなり、リークチェッカーを連続式に構成しても
小型化が図り易くなるなど、実用性に優れた効果を奏す
るものである。
As described above, according to the leak checker for a paper container of the present invention, the upper part of the paper container including the closed heat-seal closing portion is covered and closed with the covered upper part of the paper container. A holder that forms a space, a pressure means that is connected to the holder and supplies air to the closed space to maintain a constant pressure state, and uniformly applies external pressure to the upper surface of the paper container covered with the holder, Measuring means for measuring the bulging amount of the bottom portion of the paper container by the external force application of the pressurizing means in contact or non-contact, and whether the bulging amount of the bottom portion measured by the measuring means is larger than a preset value. And a determination means for determining whether or not and outputting a determination result. As described above, in the present invention, the heat-seal closing part such as the seal part at the top of the paper container or the planned opening part formed by covering the spout with the tab is located inside the closed space formed by the holder. In addition, the pressurizing means is provided so as to increase the pressure in the closed space and uniformly apply an external force by air pressure to the upper part, and the pressurizing means pressurizes the closed space to expand the bottom of the paper container. The amount of swelling is measured by a measuring means, and the difference between the amount of swelling at the bottom when air enters the container through the pinhole and the amount of swelling at the bottom when air does not enter is large, Since the swelling of the bottom portion where this difference is likely to occur is measured by the measuring means, it becomes easy to set a criterion for judging whether the quality is good or bad, and erroneous determination of the leak check can be eliminated. Further, since the amount of bulging of the bottom is measured, the measurement can be completed in a shorter time than the conventional method for measuring the transformation state of the closed space, and therefore the time until the determination is shortened, Even if the leak checker is configured as a continuous type, it is easy to reduce the size and has an effect of excellent practicality.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る紙容器のリークチェッカーの実施
の形態を示す説明図である。
FIG. 1 is an explanatory diagram showing an embodiment of a leak checker for a paper container according to the present invention.

【図2】複数のリークチェッカーを備える連続装置を示
す説明図である。
FIG. 2 is an explanatory diagram showing a continuous device including a plurality of leak checkers.

【図3】連続装置におけるリークチェッカーのホルダー
を紙容器にセットした状態を示す説明図である。
FIG. 3 is an explanatory diagram showing a state in which a holder of a leak checker in a continuous device is set in a paper container.

【図4】連続装置におけるリークチェッカーの紙容器に
対する加圧と計測を示す説明図である。
FIG. 4 is an explanatory diagram showing pressurization and measurement on a paper container by a leak checker in a continuous device.

【図5】紙容器を示す説明図である。FIG. 5 is an explanatory diagram showing a paper container.

【図6】従来のリークチェッカーを示す説明図である。FIG. 6 is an explanatory diagram showing a conventional leak checker.

【図7】従来のリークチェッカ−における閉鎖空間での
圧力変化を示す説明図である。
FIG. 7 is an explanatory diagram showing a pressure change in a closed space in a conventional leak checker.

【符号の説明】[Explanation of symbols]

1…リークチェッカー 2…ホルダー 3…閉鎖空間 4…加圧手段 7…計測手段 8…判定手段 9…連続装置 1 ... Leak Checker 2 ... Holder 3 ... Closed Space 4 ... Pressurizing Means 7 ... Measuring Means 8 ... Judging Means 9 ... Continuous Device

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】閉鎖されたヒートシール閉鎖部を含む紙容
器の上部を覆い、この覆われた紙容器の上部とで閉鎖空
間を形成するホルダーと、前記ホルダーに接続されて前
記閉鎖空間に空気を供給して定圧状態に保ち、ホルダー
に覆われた紙容器の上部の表面に均一に外圧を付与する
加圧手段と、前記加圧手段の外力付与による紙容器の底
部の膨出量を接触又は非接触で計測する計測手段と、前
記計測手段により計測された前記底部の膨出量が予め設
定された値より大きい否かを判定し判定結果を出力する
判定手段とを備えることを特徴とする紙容器のリークチ
ェッカー。
1. A holder that covers an upper portion of a paper container including a closed heat-seal closing portion and forms a closed space with the upper portion of the covered paper container; and an air connected to the holder to the closed space. To maintain a constant pressure state and to apply a uniform external pressure to the upper surface of the paper container covered by the holder, and the bulging amount of the bottom of the paper container due to the external force applied by the pressing device. Alternatively, it is provided with a measuring means for measuring in a non-contact manner, and a judging means for judging whether or not the bulging amount of the bottom portion measured by the measuring means is larger than a preset value and outputting a judgment result. Leak checker for paper containers.
JP2490696A 1996-01-19 1996-01-19 Leak checker for paper container Pending JPH09196804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2490696A JPH09196804A (en) 1996-01-19 1996-01-19 Leak checker for paper container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2490696A JPH09196804A (en) 1996-01-19 1996-01-19 Leak checker for paper container

Publications (1)

Publication Number Publication Date
JPH09196804A true JPH09196804A (en) 1997-07-31

Family

ID=12151231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2490696A Pending JPH09196804A (en) 1996-01-19 1996-01-19 Leak checker for paper container

Country Status (1)

Country Link
JP (1) JPH09196804A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003075230A (en) * 2001-08-31 2003-03-12 Toyo Seikan Kaisha Ltd Method and apparatus for inspection of container
JP2009249004A (en) * 2008-04-07 2009-10-29 Nissin Electronics Co Ltd Sealing failure inspecting method and inspecting device for cylindrical container-packaged product
JP2010001081A (en) * 2009-10-06 2010-01-07 Kao Corp Manufacturing method of self-standing bag
JP2018197667A (en) * 2017-05-23 2018-12-13 第一実業株式会社 Inspection device for containers
CN113039420A (en) * 2018-11-29 2021-06-25 霍伊夫特***技术有限公司 Leak detection
JP2021131309A (en) * 2020-02-20 2021-09-09 株式会社立川製鑵 Inspection device and inspection method of leak from container

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003075230A (en) * 2001-08-31 2003-03-12 Toyo Seikan Kaisha Ltd Method and apparatus for inspection of container
JP2009249004A (en) * 2008-04-07 2009-10-29 Nissin Electronics Co Ltd Sealing failure inspecting method and inspecting device for cylindrical container-packaged product
JP2010001081A (en) * 2009-10-06 2010-01-07 Kao Corp Manufacturing method of self-standing bag
JP2018197667A (en) * 2017-05-23 2018-12-13 第一実業株式会社 Inspection device for containers
CN113039420A (en) * 2018-11-29 2021-06-25 霍伊夫特***技术有限公司 Leak detection
CN113039420B (en) * 2018-11-29 2023-11-07 霍伊夫特***技术有限公司 Leak detection
JP2021131309A (en) * 2020-02-20 2021-09-09 株式会社立川製鑵 Inspection device and inspection method of leak from container

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