JPS63308538A - Leak inspection and selection of acceptable container - Google Patents
Leak inspection and selection of acceptable containerInfo
- Publication number
- JPS63308538A JPS63308538A JP14455787A JP14455787A JPS63308538A JP S63308538 A JPS63308538 A JP S63308538A JP 14455787 A JP14455787 A JP 14455787A JP 14455787 A JP14455787 A JP 14455787A JP S63308538 A JPS63308538 A JP S63308538A
- Authority
- JP
- Japan
- Prior art keywords
- container
- leak
- displacement
- pressing force
- liquid
- 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.)
- Granted
Links
- 238000007689 inspection Methods 0.000 title abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000006073 displacement reaction Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims description 21
- 230000002950 deficient Effects 0.000 claims description 9
- 238000010998 test method Methods 0.000 claims description 2
- 230000005489 elastic deformation Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、キャップが密に組付けられた状態における容
器のリーク（漏れ）の有無の検査方法。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is a method for inspecting the presence or absence of leakage in a container with a cap tightly assembled.
およびリークの有無を含む良品容器の選別方法に関する
ものである。The present invention also relates to a method for selecting good containers, including the presence or absence of leaks.
従来、キャップが密に組付けられた容器のリークを検査
する方法としては、容器を逆立させて内容液が漏れるか
否かによって判断する原始的なものから、キャップの頂
壁に穴をあけ、セプタムと呼ばれるゴム製部品をその穴
に密嵌入し、そのセプタムに圧力計に連通された注射針
を差込んで容器内の圧力を測定するといった科学的なも
のまで様々存在する。Conventional methods to check for leaks in containers with tightly assembled caps range from the primitive method of turning the container upside down and determining whether the contents leak out, to the primitive method of checking whether the contents leak or not, to the method of drilling a hole in the top wall of the cap. There are various scientific methods, such as measuring the pressure inside a container by tightly fitting a rubber part called a septum into the hole and inserting a syringe needle connected to a pressure gauge into the septum.
又、容器に変形等が発生しているか否かといった良品容
器選別方法は、目視によるものが一般的である。In addition, visual inspection is generally used to select non-defective containers to determine whether the containers are deformed or not.
従来のリーク検査方法において、前者の方法は大きなリ
ークは発見出来るものの、小さなリークを発見すること
は難しい。又、後者の方法においては、キャップに穴を
あけなければならないため全ての容器を検査することが
出来ないと共に、キャップにあけた穴からリークが発生
することもあって、正確な検査を行うことが困難であっ
た。Among conventional leak inspection methods, although the former method can detect large leaks, it is difficult to detect small leaks. In addition, in the latter method, it is not possible to inspect all containers because a hole must be made in the cap, and leakage may occur from the hole in the cap, making it difficult to perform accurate inspection. was difficult.
さらに、従来の良品容器選別方法にあっては。Furthermore, in the conventional method of sorting out good containers.
大きな変形等は見つけることが出来るが、そうでない小
さな変形等を見つけ出すことは困難であった。It is possible to find large deformations, but it is difficult to find other small deformations.
本発明は、こうした問題に鑑み考えられたもので、容易
に、全ての容器を正確に検査出来るリーク検査方法、お
よび良品容器の選別方法を提供することを目的とする。The present invention was conceived in view of these problems, and aims to provide a leak testing method that can easily and accurately test all containers, and a method for selecting non-defective containers.
そのため、内容液３を高温充填あるいはレトルト処理し
、内容液３が冷却した状態において、容器１胴部の片側
を固定し、その固定された側の反対側に外方から内方に
向けて一定の押圧力を加える。そして、その押圧力によ
って内方に弾性変形した前記胴部の変形変位量を測定し
、その変位量を、リークのない容器１において、上記と
同じ条件のもとで行って得た変位基準値と比較してリー
クの有無を判断することとした。Therefore, when the content liquid 3 is filled at high temperature or retorted, and the content liquid 3 is cooled, one side of the body of the container 1 is fixed, and a constant amount is applied from the outside to the inside on the opposite side of the fixed side. Apply a pressing force of Then, the amount of deformation displacement of the body that is elastically deformed inward by the pressing force is measured, and the amount of displacement is determined as a displacement reference value obtained by performing the measurement in the leak-free container 1 under the same conditions as above. The decision was made to determine the presence or absence of a leak by comparing the
又、良品容器１を選別するために、一定量の内容液３が
高温充填され、あるいはレトルト処理がされた後の、キ
ャップ２が密に組付けられた容器１において、内容液３
が冷却した際におけるその内容液３の液面を、あらかじ
め同一状況下において良品を使用して行った際の液面と
の高低の比較で良品を選んだ後、上記したリーク検査方
法を行うこととした。In addition, in order to select non-defective containers 1, a certain amount of the content liquid 3 is filled in at high temperature or retorted, and the cap 2 is tightly assembled in the container 1.
After selecting a good product by comparing the level of the content liquid 3 when it is cooled with the liquid level when using a good product under the same conditions in advance, perform the leak inspection method described above. And so.
高温の内容液３を充填したり、内容液３にレトルト処理
を施したりした後、内容液３が常温にまで冷却するに従
い容器１内の内圧は必然的に減少する。そして、この内
圧の程度によって容器１胴部の剛性は変化する。After filling the container 1 with high-temperature liquid 3 or subjecting the liquid 3 to retort treatment, the internal pressure within the container 1 inevitably decreases as the liquid 3 cools down to room temperature. The rigidity of the body of the container 1 changes depending on the level of this internal pressure.
すなわち、減圧の度合いが大きくて容器１の内圧が低い
ほど外力に対する抵抗力が小さくなるため、容器１胴部
は内方へ変形し易くなる。これをリークのない容器１と
リークのある容器１において比較してみると、リークの
ない容器１は、大気と通じていないため減圧の度合いが
高く、よって内圧が低くなる。逆にリークのある容器ｌ
においては、大気と通じているため、減圧され難く、よ
って内圧もリークのない容器１と比較して高いものとな
る。That is, the greater the degree of pressure reduction and the lower the internal pressure of the container 1, the smaller the resistance to external force, and the more easily the body of the container 1 deforms inward. Comparing this between a container 1 without a leak and a container 1 with a leak, the container 1 without a leak has a high degree of depressurization because it does not communicate with the atmosphere, and therefore has a low internal pressure. Container with leak on the contrary
Since the container 1 communicates with the atmosphere, it is difficult to reduce the pressure, and the internal pressure is therefore higher than that of the container 1 without leaks.
第４図は、−実験結果を示すグラフである。二つの折れ
線のうち、上側に示す線がリークのない容器１から得た
変位基準値で、下側に示す線がリークのある容器１から
得た変形変位量である。FIG. 4 is a graph showing experimental results. Of the two polygonal lines, the upper line is the displacement reference value obtained from the container 1 without leaks, and the lower line is the deformation displacement amount obtained from the container 1 with leaks.
この実験は１口筒の口径４０胴、高さ１２５ｍｍ、胴部
の外径７０ｍｍ、胴部の肉厚０．６髄で容積が３５０ｃ
ｃのポリエチレンテレフタレート樹脂製容器１に。In this experiment, the diameter of the barrel was 40 mm, the height was 125 mm, the outer diameter of the barrel was 70 mm, the wall thickness of the barrel was 0.6 mm, and the volume was 350 cm.
In the polyethylene terephthalate resin container 1 of c.
８０°Ｃの熱湯を充填してキャップ２を組付け、２０’
Ｃの常温に冷却して行ったものである。この容器１を第
２図に示すように、その胴部の片側を固定し。Fill with 80°C hot water, attach cap 2, and heat for 20'
It was cooled to room temperature of C. As shown in FIG. 2, this container 1 is fixed at one side of its body.
その反対側に１ｋｇ／ｃｎ（の荷重を加えたところ、リ
ークのない容器１の胴部は、リークのある容器１の胴部
の約１．６５倍変位した。８ｋｇ／ｃｒｒｒの荷重を加
えた場合、その数は約３．１倍に増えた。When a load of 1 kg/cn was applied to the opposite side, the body of container 1 without a leak was displaced approximately 1.65 times as much as the body of container 1 with a leak.A load of 8 kg/crrr was applied. In this case, the number increased approximately 3.1 times.
こうしたことから本発明は、あらかじめリーク検査を行
う容器１と同一の容器１から基準値を測定しておき、リ
ーク検査をおこなった容器１の変位量をその基準値と比
較し、その変位量が基準値とほぼ等しければリークは発
生しておらず、又。Therefore, in the present invention, a reference value is measured in advance from the same container 1 as the container 1 to be tested for leakage, and the amount of displacement of the container 1 that has been tested for leakage is compared with the reference value, and the amount of displacement is determined. If it is almost equal to the reference value, no leak has occurred.
変位量が基準値より小さければ、その容器１にはリーク
が発生していることが容易にわかる。If the amount of displacement is smaller than the reference value, it can be easily seen that a leak has occurred in the container 1.
良品容器１選別方法においては、内容液３液面の高低を
比較するわけであるが、これによって。In the method for selecting good containers 1, the levels of the liquid contents 3 are compared.
まず容器１の変形等を発見することが出来る。例えば、
容器１が変形して容器１内の容積が増加していれば、液
面は良品容器１の液面より低くなるし、逆に容積が減少
していれば液面は高くなる。First, deformation of the container 1 can be detected. for example,
If the container 1 is deformed and the volume inside the container 1 increases, the liquid level will be lower than the liquid level of the good container 1, and conversely, if the volume is decreased, the liquid level will become higher.
又、同様に、容器１に引けが発生していれば、容器１の
容積が増加するため液面が良品容器１の液面より低くな
る。従って、こうした液面の高低を検査することによっ
て、容器１に変形等が発生しているか否かを検出するこ
とが出来る。Similarly, if the container 1 is shrinking, the volume of the container 1 increases and the liquid level becomes lower than the liquid level of the good container 1. Therefore, by inspecting the height of the liquid level, it is possible to detect whether or not the container 1 has been deformed.
それと同時に、この方法によってリークの検査も行うこ
とが出来る。高温充填あるいはレトルト処理がなされた
容器１内は、冷却と共に減圧するが、この減圧により容
器１は内方に変形し、容器１内の容積が減少する。この
ため、内容液３の液面が上昇することになる。この場合
、リークのある容器１とリークのない容器１とを比較し
た場合。At the same time, this method can also be used to test for leaks. The inside of the container 1 that has been filled at high temperature or retorted is depressurized as it cools down, but this depressurization causes the container 1 to deform inward and the volume inside the container 1 to decrease. Therefore, the level of the content liquid 3 will rise. In this case, when comparing container 1 with a leak and container 1 without a leak.
リークのある容器１は大気と連通しているため減圧は小
さく、容積変化は少ない。従って、液面は良品容器１の
液面と比較して高くなる。こうして液面の高低を比較す
ることによって、容器１に変形やリーク等の何らかの欠
陥が発生しているか否かを発見することが出来る。Since the container 1 with the leak communicates with the atmosphere, the pressure reduction is small and the volume change is small. Therefore, the liquid level is higher than that of the good container 1. By comparing the height of the liquid level in this way, it is possible to discover whether or not the container 1 has some kind of defect such as deformation or leakage.
この検査によって良品とされた容器１に、さらに前記し
た容器１胴部を押圧することによって得た変形変位量の
比較によるリーク検査を行い、良品容器１の選別を行う
ものである。Containers 1 determined to be non-defective through this inspection are further subjected to a leakage test by comparing the amount of deformation obtained by pressing the body of the container 1 described above, and non-defective containers 1 are selected.
第１図は９本発明による方法を実施するための一実施例
である。容器１胴部の片側を固定し、その反対側を、押
圧棒の先端部に荷重測定器５（ここではひずみゲージ）
を設けたシリンダー４で押圧するものである。この荷重
測定器５によって胴部に加わっている押圧力を測定し、
一定の押圧力が加わるように調節する。又、胴部の変形
変位量は、変位量測定器６（ここではレーザー変位計）
によって測定するものとしている。シリンダー４は、空
圧式や油圧式がある。FIG. 1 shows an embodiment for carrying out the method according to the invention. One side of the body of the container 1 is fixed, and the other side is attached to the tip of a pressure rod with a load measuring device 5 (here, a strain gauge).
It is pressed by a cylinder 4 equipped with a. This load measuring device 5 measures the pressing force applied to the trunk,
Adjust so that a constant pressing force is applied. In addition, the amount of deformation and displacement of the torso is measured using a displacement measuring device 6 (here, a laser displacement meter).
It is assumed to be measured by The cylinder 4 may be of a pneumatic type or a hydraulic type.
第２図に示す実施方法においては、容器１胴部を押圧す
る動力源にモーター７（パルスモータ−や、ＤＣサーボ
モーター等がある）を使用し、変位置測定器６としてエ
ンコンダーを使用している。In the implementation method shown in FIG. 2, a motor 7 (such as a pulse motor or a DC servo motor) is used as the power source for pressing the body of the container 1, and an encoder is used as the displacement position measuring device 6. There is.
変位量測定器としては、この外、リニアゲージ等の使用
も考えられる。In addition to this, a linear gauge or the like may be used as the displacement measuring device.
第３図に示す実施方法においては、容器１胴部にフラン
ジ９を組付け、そのフランジ９を固定および押圧するこ
とによって、変形変位量を測定するものとしている。In the implementation method shown in FIG. 3, a flange 9 is attached to the body of the container 1, and the flange 9 is fixed and pressed to measure the amount of deformation displacement.
第５図は、液面の高低によって良品容器１を選別する一
実施例を示すものである。ここでは、液面の高さをライ
ンセンサー８で計測し、それをあらかじめ測定しておい
た良品の液面の高さと比較し、その差によって容器１に
変形やリークがあるか否かの判断を行うものである。FIG. 5 shows an embodiment in which non-defective containers 1 are selected based on the height of the liquid level. Here, the height of the liquid level is measured by the line sensor 8, compared with the height of the liquid level of a good product measured in advance, and based on the difference, it is determined whether there is deformation or leakage in the container 1. This is what we do.
この検査によって変形等がないとされたものがさらに前
記した容器胴部の変形変位量を測定して基準値と比較す
ることによるリーク検査を経て。Those that were determined to be free of deformation through this inspection were further subjected to a leakage inspection by measuring the amount of deformation of the container body described above and comparing it with a reference value.
最終的な良品としての選別を受けるものである。The final product is selected as a good product.
このように本発明によるリーク検査方法によれば、容器
１胴部の変形変位量と、変位基準値との比較によって、
リークの有無を判断するもので。As described above, according to the leak test method of the present invention, by comparing the amount of deformation displacement of the body of the container 1 with the displacement reference value,
This is to determine whether there is a leak.
従来のようにキャップ２に穴をあける必要がないため、
大きなリークはもとより小さなリークをも容易に発見す
ることが出来ると共に、全ての容器１を検査することも
可能であり、かつキャップ２にあけた穴からリークが発
生するといったこともないので、正確な検査を行うこと
が出来る。Since there is no need to drill a hole in the cap 2 as in the conventional case,
Not only can large leaks but also small leaks be easily detected, all containers 1 can be inspected, and leaks will not occur from holes made in the cap 2, so accurate Tests can be carried out.
又２本発明による良品容器１選別方法にあっては、液面
の高低による容器１の変形やリーク、そして容器１胴部
の変形変位量の測定および比較によるリークの有無の二
つの検査を行うので、小さな変形やリークを発見出来、
確実に良品を選別出来る優れた効果を発揮する。In addition, in the method for selecting good containers 1 according to the present invention, two tests are performed: deformation and leakage of the container 1 due to the height of the liquid level, and presence or absence of leakage by measuring and comparing the amount of deformation and displacement of the body of the container 1. Therefore, small deformations and leaks can be detected.
It has an excellent effect of reliably selecting good products.
第１図は本発明方法を実施するだめの一実施例。
第２図は別の実施例、第３図はさらに別の実施例。
第４図はリークのない容器から得た変位基準値とリーク
のある容器から得た変形変位量を示すグラフ、第５図は
本発明の良品選別方法の一実施例を示す図である。
符号の説明
１：容器、 ２：キャップ、 ３：内容液。
４ニジリンダ−１５：荷重測定器。
６：変位量測定器、 ７：モーター。
８ニラインセンサー、 ９：フランジ。
ンψし２FIG. 1 shows an embodiment of the method of the present invention. FIG. 2 shows another embodiment, and FIG. 3 shows yet another embodiment. FIG. 4 is a graph showing the displacement reference value obtained from a container with no leaks and the deformation displacement amount obtained from a container with a leak, and FIG. 5 is a diagram showing an embodiment of the non-defective product selection method of the present invention. Explanation of symbols 1: Container, 2: Cap, 3: Content liquid. 4 Nijilinda-15: Load measuring device. 6: Displacement measuring device, 7: Motor. 8 line sensor, 9: flange. Nψshi2
Claims (2)
リークを検査する方法であって、 内容液（３）を高温充填あるいはレトルト処理し、該内
容液（３）が冷却した際における前記容器（１）胴部の
片側を固定し、該固定された側の反対側に外方から内方
に向けて一定の押圧力を加え、該押圧力によって内方に
弾性変形した前記胴部の変形変位量を、 リークのない容器（１）において、上記と同一条件下の
もとで行って得た変位基準値と比較してリークの有無を
判断するリーク検査方法。(1) A method of inspecting for leaks in a container (1) in which a cap (2) is tightly assembled, in which the liquid content (3) is filled at high temperature or retorted, and the liquid content (3) is cooled. When one side of the body of the container (1) is fixed, a certain pressing force is applied from the outside to the inside on the opposite side to the fixed side, and the container is elastically deformed inward by the pressing force. A leak test method in which the presence or absence of a leak is determined by comparing the amount of deformation displacement of the body with a displacement reference value obtained under the same conditions as above in a leak-free container (1).
の内容液（３）が高温充填され、あるいはレトルト処理
がされた後のキャップ（２）が密に組付けられた容器（
１）において、前記内容液（３）が冷却した際における
該内容液（３）の液面を、あらかじめ同一状況下におい
て良品を使用して行った際の液面との高低の比較で良品
を選んだ後、 前記容器（１）胴部の片側を固定し、該固定された側の
反対側に外方から内方に向けて一定の押圧力を加え、該
押圧力によって内方に弾性変形した前記胴部の変形変位
量を、 リークのない容器（１）において、上記と同一条件下の
もとで行って得た変位基準値と比較してリークの有無を
判断して成る良品容器選別方法。(2) A method for selecting non-defective containers (1), in which containers (2) are tightly assembled with caps (2) that have been filled with a certain amount of liquid (3) at high temperature or have been subjected to retort treatment.
In 1), when the content liquid (3) is cooled, the liquid level of the content liquid (3) is compared with the liquid level when using a non-defective product under the same conditions. After selecting, one side of the body of the container (1) is fixed, and a certain pressing force is applied from the outside to the inside on the opposite side of the fixed side, and the pressing force causes elastic deformation inward. The amount of deformation and displacement of the body is compared with the displacement reference value obtained in the leak-free container (1) under the same conditions as above to determine the presence or absence of a leak. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62144557A JP2824574B2 (en) | 1987-06-10 | 1987-06-10 | Leak inspection method and non-defective container selection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62144557A JP2824574B2 (en) | 1987-06-10 | 1987-06-10 | Leak inspection method and non-defective container selection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63308538A true JPS63308538A (en) | 1988-12-15 |
| JP2824574B2 JP2824574B2 (en) | 1998-11-11 |
Family
ID=15365038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62144557A Expired - Fee Related JP2824574B2 (en) | 1987-06-10 | 1987-06-10 | Leak inspection method and non-defective container selection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2824574B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002234513A (en) * | 2001-02-08 | 2002-08-20 | Ishida Co Ltd | Seal checker |
| JP2008542699A (en) * | 2005-05-24 | 2008-11-27 | ユニベルシテ デ シアンス エ テクノロジー ドゥ リール | Color for measuring the lateral deformation of the specimen during the compression test |
| JP2015072248A (en) * | 2013-10-04 | 2015-04-16 | ライオン株式会社 | Seal part-inspecting press member for tube container, seal part inspection device for the tube container, seal part inspection method for the tube container using the same, and method for producing the tube container |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990026A (en) * | 1982-11-16 | 1984-05-24 | Kishimoto Akira | Inspecting method of sealing defect of hermetically sealed container |
| JPS59163532A (en) * | 1983-03-09 | 1984-09-14 | Hokkai Can Co Ltd | Method and device for inspecting internal pressure of tightly sealed-up vessel |
| JPS59224536A (en) * | 1983-06-03 | 1984-12-17 | Honshu Paper Co Ltd | Leak detecting method of hermetically sealed liquid enclosure |
-
1987
- 1987-06-10 JP JP62144557A patent/JP2824574B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990026A (en) * | 1982-11-16 | 1984-05-24 | Kishimoto Akira | Inspecting method of sealing defect of hermetically sealed container |
| JPS59163532A (en) * | 1983-03-09 | 1984-09-14 | Hokkai Can Co Ltd | Method and device for inspecting internal pressure of tightly sealed-up vessel |
| JPS59224536A (en) * | 1983-06-03 | 1984-12-17 | Honshu Paper Co Ltd | Leak detecting method of hermetically sealed liquid enclosure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002234513A (en) * | 2001-02-08 | 2002-08-20 | Ishida Co Ltd | Seal checker |
| JP2008542699A (en) * | 2005-05-24 | 2008-11-27 | ユニベルシテ デ シアンス エ テクノロジー ドゥ リール | Color for measuring the lateral deformation of the specimen during the compression test |
| JP2015072248A (en) * | 2013-10-04 | 2015-04-16 | ライオン株式会社 | Seal part-inspecting press member for tube container, seal part inspection device for the tube container, seal part inspection method for the tube container using the same, and method for producing the tube container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2824574B2 (en) | 1998-11-11 |
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