JP3251406B2 - Abnormal inspection method for can contents - Google Patents
Abnormal inspection method for can contentsInfo
- Publication number
- JP3251406B2 JP3251406B2 JP32108393A JP32108393A JP3251406B2 JP 3251406 B2 JP3251406 B2 JP 3251406B2 JP 32108393 A JP32108393 A JP 32108393A JP 32108393 A JP32108393 A JP 32108393A JP 3251406 B2 JP3251406 B2 JP 3251406B2
- Authority
- JP
- Japan
- Prior art keywords
- internal pressure
- pressure
- contents
- measured
- value
- 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.)
- Expired - Fee Related
Links
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Measuring Fluid Pressure (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、缶詰の内容物の腐敗に
よる変質等の異常を検査する方法に関し、特に、缶詰の
缶内圧を測定することにより内容物の変質等の異常の有
無を検査する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting for abnormalities such as deterioration due to decay of the contents of cans, and more particularly, to inspecting for abnormalities such as deterioration of contents by measuring the internal pressure of a can. On how to do it.
【０００２】[0002]
【従来の技術】食品や飲料等を内容物として充填し密封
した缶詰においては、殺菌が不充分であったり密封が不
完全であったりすると内容物が腐敗して変質し、人体に
有害なものとなって衛生上問題となるため、出荷前に缶
の漏れや内容物に変質がある不良缶詰を確実に排除して
おくことが要求されている。2. Description of the Related Art In cans filled with foods and beverages as contents and sealed, if the sterilization is insufficient or the sealing is incomplete, the contents will rot and deteriorate, causing harm to the human body. Therefore, there is a need for sanitary problems. Therefore, it is required to surely eliminate defective cans that have leaks or deteriorated contents before shipping.
【０００３】そのため、不良缶詰を確実に把握すること
ができるように、内容物が加熱されている状態で密封す
ることによりその冷却後に缶内が負圧状態になるように
して、密封の不完全による漏れや内容物の腐敗によりガ
スが発生することによる缶内圧の変化を、打検装置によ
り検出したり（特開昭５３−１１９０８７号公報等参
照）、本来凹状態であるべき缶蓋部分の膨らみを外部か
ら観察することによって、容易に判別できるようにする
ということが従来から一般的に行われている。[0003] Therefore, in order to be able to grasp defective cans with certainty, the contents are sealed in a heated state so that the inside of the can is brought into a negative pressure state after cooling, so that incomplete sealing is achieved. A change in the internal pressure of the can due to leakage due to gas generation and gas generation due to decay of the contents is detected by a beating device (see Japanese Patent Application Laid-Open No. 53-119087, etc.) Conventionally, it has been generally performed that the bulge can be easily identified by observing the bulge from the outside.
【０００４】一方、近年、省資源、低コストという観点
から、缶材であるアルミニウム合金板や表面処理鋼板の
使用を少なくするために、内容物が非炭酸飲料であって
も、できるだけ薄い缶胴を使用すると共に液体窒素等を
添加することにより缶内圧を外気圧よりも大きくして缶
の形状を維持するようにした陽圧缶詰が多く生産されて
いるが、このような陽圧缶詰では、上記のような負圧缶
詰と同様の缶内圧の検知方法では不良缶詰の検出を行う
ことが困難であるため、これに対応できるように、缶詰
の缶内圧を更に正確に測定するための方法や装置、或い
は、缶詰からの微細な漏れを検出する方法等が既に提案
されている。（例えば、特開昭６２−１６２９３７号公
報、特開昭６４−４３５号公報、特開平２−２８４０３
３号公報等参照）On the other hand, in recent years, from the viewpoint of resource saving and low cost, in order to reduce the use of aluminum alloy sheets and surface-treated steel sheets as cans, even if the contents are non-carbonated beverages, the can body is as thin as possible. Many positive pressure cans have been produced in which the internal pressure of the can is made higher than the external pressure by adding liquid nitrogen or the like and the shape of the can is maintained, but in such positive pressure cans, Since it is difficult to detect a defective can with the same method for detecting the can internal pressure as the above-described negative pressure can, a method for measuring the can internal pressure of the can more accurately to cope with this is necessary. A method for detecting minute leakage from a device or a can has been already proposed. (For example, JP-A-62-162937, JP-A-64-435, JP-A-2-28403)
No. 3 publication etc.)
【０００５】[0005]
【発明が解決しようとする課題】ところで、缶内圧を外
気圧よりも大きくした陽圧缶詰においても、内容物が腐
敗して変質するとガスが発生してその缶内圧が更に増加
するため、従来の缶内圧を正確に測定できる装置を用い
ることにより、缶に内容物を充填し密封した後の缶詰の
それぞれの缶内圧を測定してその基準値を出し、その
後、製造工場から出荷する時点で再びそれぞれの缶詰の
缶内圧を測定してそれらの測定値を当初の基準値と比較
することによって、個々の缶詰について製造から出荷ま
での間に内容物に腐敗による変質が生じているか否かを
判定することが可能と考えられる。By the way, even in a positive pressure can where the internal pressure of the can is made higher than the outside air pressure, if the contents rot and deteriorate, gas is generated and the internal pressure of the can further increases. By using a device that can accurately measure the internal pressure of the can, it measures the internal pressure of each of the cans after filling and sealing the contents of the can and gives the reference value, and then again when shipping from the manufacturing plant By measuring the internal pressure of each can and comparing those measured values to the initial reference value, it is possible to determine whether or not the contents of each can have deteriorated due to decay from production to shipment. It is considered possible.
【０００６】しかしながら、実際上は、液体窒素などを
用いて強制的に缶内圧を高めて缶形状を維持させる絞り
しごき等の陽圧缶詰では、同じ内容物の缶詰であっても
缶に内容物を密封した当初の缶内圧に大きなバラツキが
出るため、所定時間経過後の出荷段階において缶内圧値
を正確に測定して当初の基準値と比較しても、個々の缶
詰における内容物の変質を正確に判定することは困難で
あり、そのため、例えば、ミルクコーヒーのような耐熱
性の高い高温細菌胞子を含む乳製品を使用した腐敗し易
いような食品については品質管理の上でブリキやアルミ
ニウム合金製の絞りしごき缶を使用しにくいというよう
な問題が生じることとなる。However, in practice, in positive pressure canning such as drawing and ironing in which the internal shape of a can is maintained by forcibly increasing the internal pressure of the can using liquid nitrogen or the like, even if the same contents are canned, the contents are stored in the can. Since the internal pressure of the can at the time of sealing greatly varies, even if the internal pressure of the can is accurately measured at the shipping stage after the lapse of a predetermined time and compared with the initial reference value, the deterioration of the contents in each can It is difficult to make an accurate determination, so, for example, for foods that are easily perishable using dairy products containing heat-resistant high-temperature bacterial spores, such as milk coffee, tin and aluminum alloys are required for quality control. A problem arises that it is difficult to use a wrung and ironed can made of iron.
【０００７】本発明は、上記のような従来の缶内容物の
異常検査方法の持つ問題を解決することを目的としてお
り、具体的には、缶詰の製造後所定時間が経過した時
に、缶詰の内容物に腐敗による異常が生じているか否か
を、複雑な缶内圧測定装置を使用することなく、従来の
缶内圧測定装置等を用いることにより正確に判定するこ
とができる缶内容物の異常検査方法を提供することを目
的としている。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the above-mentioned conventional method for inspecting the abnormality of can contents, and more specifically, when a predetermined time has elapsed after the production of cans, Abnormal inspection of can contents that can be accurately determined by using a conventional can internal pressure measuring device, etc., without using a complicated can internal pressure measuring device, as to whether or not abnormalities have occurred in the contents due to decay. It is intended to provide a way.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記の課題を
解決しかつ目的を達成するために、缶内容物の異常検査
方法において、内容物が充填され密封された缶詰の当初
の缶内圧を測定して、その測定結果を個々の缶詰の外表
面の所定箇所に表示しておくと共に、当初の缶内圧の測
定時から所定時間経過後に、当該缶詰について再度缶内
圧の測定を行い、この測定結果と個々の缶詰の表面に表
示されている当初の缶内圧とを比較することにより、個
々の缶詰における内容物の異常の有無を判定することを
特徴とするものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the object, the present invention relates to a method for inspecting an abnormality in can contents, which comprises the steps of: Is measured, and the measurement result is displayed at a predetermined position on the outer surface of each can, and after a predetermined time has elapsed since the initial measurement of the can internal pressure, the can internal pressure is measured again for the can. It is characterized by comparing the measurement result with the initial can pressure displayed on the surface of each can to determine whether there is any abnormality in the contents of each can.
【０００９】また、上記のような缶内容物の異常検査方
法において、当初の缶内圧の測定とほぼ同時にその缶表
面温度を測定し、この缶内圧と缶表面温度の測定結果に
基づいて当該缶詰が所定の基準温度となったときの缶内
圧を予測算出した缶内圧補正値を出し、この缶内圧補正
値を測定結果として缶詰の外表面に表示しておくと共
に、所定時間経過後の缶内圧の再測定を、それらの缶詰
が所定の基準温度にある状態で行うようにしたことを特
徴とするものである。In the above-described method for inspecting an abnormality in the contents of a can, the can surface temperature is measured at substantially the same time as the initial measurement of the internal pressure of the can. A can pressure correction value that predicts and calculates the can pressure when the temperature reaches a predetermined reference temperature is displayed on the outer surface of the can as a measurement result, and the can pressure after a predetermined time elapses. Is re-measured in a state where the cans are at a predetermined reference temperature.
【００１０】[0010]
【作 用】上記のような構成により、まず、缶詰が製造
された当初の缶内圧測定時において、各缶詰の缶内圧の
測定結果を見ることにより、缶の形状維持に必要な缶内
圧を有していないものや缶の密封状態が不良で漏れ（リ
ーク）があるような不良缶詰をチェックすることができ
る。[Operation] With the above configuration, first, at the time of measuring the internal pressure of the can at the time when the can is manufactured, the internal pressure required for maintaining the shape of the can is determined by observing the measurement result of the internal pressure of each can. It is possible to check for defective cans such as those that have not been made or that the sealing state of the can is poor and there is leakage (leak).
【００１１】さらに、当初の缶内圧測定時から所定時間
経過した後、すなわち、出荷前で缶詰の内容物に腐敗が
生じたかどうかを判断すべき時期に再度缶内圧の測定を
行い、それぞれの缶詰についての測定結果を個々の缶詰
の缶表面に表示されているそれぞれの当初の測定値と比
較することにより、個々の缶詰により当初の缶内圧にバ
ラツキがある場合でも、それぞれの缶詰毎に正確に個々
の缶内圧の上昇値あるいは下降値（スローリーク缶詰の
場合）を検出することができて、缶詰の内容物の腐敗の
有無の判定を正確に行うことができると共に、スローリ
ーク缶詰を検出することもできる。Further, after a lapse of a predetermined time from the initial measurement of the internal pressure of the can, that is, at the time when it is necessary to judge whether or not the contents of the can have decayed before shipment, the internal pressure of the can is measured again, and each can pressure is measured. By comparing the measurement results for each can with the initial measurement values displayed on the can surface of each can, even if the initial internal pressure varies due to individual cans, accurate It is possible to detect an increase value or a decrease value (in the case of slow leak canning) of the internal pressure of each can, and to accurately determine whether or not the contents of the can have decayed, and to detect a slow leak can. You can also.
【００１２】なお、当初の缶内圧測定とほぼ同時に缶表
面温度を測定し、この缶表面温度に基づいて当該缶詰が
所定の基準温度となったときの缶内圧を予測算出した缶
内圧補正値を出し、この缶内圧補正値を測定結果として
缶詰の外表面に表示しておくことにより、加熱殺菌が行
われた直後の缶詰の缶内圧を測定したような場合やいろ
いろな温度の缶詰が混在しているような場合において
も、個々の缶詰によって温度変化の幅が異なるにもかか
わらず、それぞれの缶詰毎に正確に個々の缶内圧の上昇
値あるいは下降値を検出することができ、缶詰の内容物
の腐敗の有無の判定を正確に行うことができる。It should be noted that the can surface temperature is measured at substantially the same time as the initial can pressure measurement, and a can pressure correction value obtained by predicting and calculating the can pressure when the can reaches a predetermined reference temperature based on the can surface temperature is calculated. By displaying the can pressure correction value on the outer surface of the can as a measurement result, it is possible to measure the can pressure inside the can immediately after heat sterilization, or to mix cans at various temperatures. Even in such cases, the rise or fall of the internal pressure of each can can be accurately detected for each can, even though the range of temperature change varies depending on the individual can. It is possible to accurately determine the presence or absence of decay of an object.
【００１３】[0013]
【実施例】以下、本発明の缶内容物の異常検査方法の一
実施例について図面を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for inspecting an abnormality of can contents according to the present invention will be described below with reference to the drawings.
【００１４】図１は、本発明の缶内容物の異常検査方法
を実施するための装置全体の概略を示すもので、製造さ
れた缶詰１０の当初の缶内圧を測定する缶内圧測定装置
１１については、ベルトコンベア１２に載置されて搬送
されてくる缶詰１０の一側方に円筒形で回転自在な受け
ロール１３が配置され、他側方にその外周面の形状が中
高形状の測定ロール１４が同じく回転自在に配置されて
いて、測定ロール１４は缶詰１０の中心方向に進退可能
に支持されており、測定ロール１４の進退状態は支持軸
１５を介してロードセル等の荷重検出器１６に伝達され
てるもので、このような構造の缶内圧測定装置１１自体
については、例えば、特開昭５９−１５７５３７号公
報，特開昭６２−１６２９３７号公報等により従来から
既に知られているものである。FIG. 1 schematically shows an entire apparatus for carrying out a method for inspecting an abnormality of can contents according to the present invention. A can pressure measuring apparatus 11 for measuring an initial can pressure of a manufactured can 10 is shown. A cylindrical and rotatable receiving roll 13 is arranged on one side of the can 10 placed and conveyed on the belt conveyor 12, and a measuring roll 14 whose outer peripheral surface has a middle-high shape is arranged on the other side. Are also rotatably arranged, and the measurement roll 14 is supported so as to be able to advance and retreat in the center direction of the can 10, and the advance and retreat state of the measurement roll 14 is transmitted to a load detector 16 such as a load cell via a support shaft 15. The can pressure measuring device 11 having such a structure is already known from, for example, Japanese Patent Application Laid-Open Nos. 59-1557537 and 62-162937. It is.
【００１５】この缶内圧測定装置１１は、受けロール１
３と測定ロール１４の間隙を通過する缶詰１０の缶内圧
に応じて測定ロール１４が進退させられ、この進退時の
荷重値が荷重検出器１６により検出され、荷重検出器１
６の出力を見ることによって缶詰１０の缶内圧値を検知
することができるものであって、この缶内圧測定装置１
１の荷重検出器１６からの出力信号は荷重値補正回路２
に入力される。The can pressure measuring device 11 includes a receiving roll 1
The measuring roll 14 is advanced and retracted according to the internal pressure of the can 10 passing through the gap between the measuring roll 14 and the measuring roll 14, and the load value at the time of the advance and retreat is detected by the load detector 16.
6, the can pressure can be detected by checking the output of the can 6.
The output signal from the load detector 16 is a load value correction circuit 2
Is input to
【００１６】缶内圧測定装置１１の近傍には、缶内圧測
定時における缶詰１０の缶表面温度を測定するための赤
外線センサ３が配置されており、この赤外線センサ３に
より測定された缶詰１０の温度についての出力信号は温
度補正回路４に入力される。なお、缶は熱伝導性の良い
鋼板又はアルミニウム合金板を主材としているので、缶
表面温度は缶内温度とほぼ等しくなっている。An infrared sensor 3 for measuring the can surface temperature of the can 10 at the time of measuring the can internal pressure is arranged near the can internal pressure measuring device 11, and the temperature of the can 10 measured by the infrared sensor 3 is measured. Is output to the temperature correction circuit 4. Since the can is mainly made of a steel plate or an aluminum alloy plate having good heat conductivity, the surface temperature of the can is substantially equal to the temperature in the can.
【００１７】温度補正回路４には、缶詰の温度による缶
内圧（荷重値）の変化特性が記憶されており、赤外線セ
ンサ３から入力された缶詰１０の実際の温度と所定の基
準温度（例えば２０℃）との差に応じた荷重値補正用の
補正係数信号が温度補正回路４から出力され、この補正
係数信号は荷重値補正回路２に入力される。The temperature correction circuit 4 stores a change characteristic of the can pressure (load value) depending on the temperature of the can. The actual temperature of the can 10 input from the infrared sensor 3 and a predetermined reference temperature (for example, 20 (° C.) is output from the temperature correction circuit 4, and the correction coefficient signal is input to the load value correction circuit 2.
【００１８】温度補正回路４から出力された補正係数信
号は、缶内圧値補正手段として利用されるもので、荷重
検出器１６から出力されて荷重値補正回路２に入力され
た荷重値を所定の基準温度における荷重値（補正缶内圧
値）に補正するためのものである。The correction coefficient signal output from the temperature correction circuit 4 is used as means for correcting the internal pressure of the can, and the load value output from the load detector 16 and input to the load value correction circuit 2 is converted into a predetermined value. This is for correcting the load value (correction can internal pressure value) at the reference temperature.
【００１９】なお、所定の基準温度の設定は、缶内に内
容物が充填され密封されてから更に加熱処理が行われた
後、それが冷えて常温状態に戻ったときの温度に近い温
度（例えば２０℃）に設定するのが好適である。The predetermined reference temperature is set at a temperature close to the temperature at which the can is cooled and returned to the normal temperature state after the can is filled with the contents and sealed, and further subjected to a heat treatment. For example, it is preferable to set to 20 ° C.).
【００２０】上記の缶内圧測定装置１１において缶内圧
が測定され、赤外線センサ３により缶表面温度が測定さ
れた缶詰１０は、ベルトコンベア等で搬送されてインク
ジェットプリンタ６に送られる。The can 10 whose can inner pressure is measured by the above-mentioned can inner pressure measuring device 11 and whose can surface temperature is measured by the infrared sensor 3 is conveyed by a belt conveyor or the like and sent to the ink jet printer 6.
【００２１】このインクジェットプリンタ６は、荷重値
補正回路２から出力される補正缶内圧値を缶詰１０の缶
外表面の所定箇所に表示するためのもので、荷重値補正
回路２からの信号が入力されたプリンターコントローラ
５によりそのプリント動作が制御され、補正缶内圧値を
示す文字や記号、例えば具体的数字やバーコードまたは
マークなどを缶詰１０の缶底部１０ｂに印刷するもので
ある。The ink jet printer 6 is for displaying the corrected can pressure value output from the load value correction circuit 2 at a predetermined position on the outer surface of the can of the can 10, and receives a signal from the load value correction circuit 2. The printing operation is controlled by the printer controller 5 and the characters and symbols indicating the corrected can internal pressure value, for example, specific numbers, bar codes or marks are printed on the bottom 10b of the can 10.
【００２２】インクジェットプリンタ６に対してその缶
底部１０ｂを対向させるように送られてきた缶詰１０に
は、図２に示されているように、缶底部１０ｂに印刷さ
れた製造年月日の表示の下側に補正缶内圧値を示す文字
等１０ｃが印刷されることとなる。As shown in FIG. 2, the can 10 sent to the ink-jet printer 6 so that the can bottom 10b is opposed to the ink printer 6 has a date of manufacture printed on the can bottom 10b. A character 10c or the like indicating the correction can internal pressure value is printed on the lower side.
【００２３】上記のようにして当初の缶内圧の測定後に
その測定結果（所定の基準温度における缶内圧値に補正
されたもの）が個々に缶底部１０ｂに印刷されたそれぞ
れの缶詰１０は、製造から所定時間経過後の出荷前の段
階、すなわち、最終的に缶詰の内容物の検査を行うべき
時点で、各缶詰１０が所定の基準温度となっている状態
において、缶内圧測定装置１１と同様の構造を有する缶
内圧測定装置２１によってそれぞれの缶内圧が再び測定
されることとなる。After the measurement of the initial can pressure as described above, the measurement results (corrected to the can pressure value at the predetermined reference temperature) are individually printed on the can bottom 10b. The same as the can internal pressure measuring device 11 in a state before the shipment after a lapse of a predetermined time, that is, at a time when the contents of the can are finally to be inspected and each can 10 is at a predetermined reference temperature. The internal pressure of each can is measured again by the internal pressure measuring device 21 having the above structure.
【００２４】その際、缶内圧測定装置２１の近傍には測
定される缶詰１０の底部１０ｂに対向するように読取器
８が設置されていて、それぞれの缶詰１０について、缶
内圧測定装置２１の荷重値検出器２６からその時点の缶
内圧を示す荷重値が出力されて比較判定回路７に入力さ
れると同時に、当該缶詰１０に表示されている補正缶内
圧値を示す文字等１０ｃが読取器８によって読み取ら
れ、それに基づいて出力される信号が読取器８から判定
比較回路７に入力される。At this time, a reader 8 is installed in the vicinity of the can pressure measuring device 21 so as to face the bottom 10b of the can 10 to be measured, and for each can 10, the load of the can pressure measuring device 21 is measured. At the same time as the load value indicating the can pressure at the time is output from the value detector 26 and input to the comparison determination circuit 7, a character 10 c indicating the corrected can pressure value displayed on the can 10 is read by the reader 8. And a signal output based on the read signal is input from the reader 8 to the determination comparison circuit 7.
【００２５】そして、判定比較回路７では、読み取られ
た補正缶内圧値とその時点での缶内圧値とが比較され、
その差が所定値以上である場合には缶詰の内容物に異常
ありと判定されて異常発見信号が出力され、比較判定回
路７から出力された異常発見信号が表示手段９に入力さ
れて、表示手段９を通じて音声あるいはランプの点灯表
示などによって外部にその旨が知らされることとなる。Then, the judgment and comparison circuit 7 compares the read corrected can pressure value with the can pressure value at that time.
If the difference is equal to or greater than a predetermined value, it is determined that the contents of the can are abnormal, and an abnormality detection signal is output. The abnormality detection signal output from the comparison determination circuit 7 is input to the display means 9 and displayed. The means is notified to the outside through the means 9 by voice or lamp lighting display.
【００２６】以上、本発明の缶内容物の異常検査方法の
一実施例についてこれを実施するための装置と共に説明
したが、このような方法によれば、不良缶詰を検出する
時点において個々の缶詰の缶内圧を測定しこれを予め定
めた１つの基準値と比較して内容物の腐敗の有無を判定
する場合と比べて、当初の缶詰の缶内圧にバラツキがあ
っても、判定不良の生じる恐れを確実に解消することが
できる。As described above, one embodiment of the method for inspecting an abnormality of can contents according to the present invention has been described together with an apparatus for carrying out the method. However, according to such a method, individual cans are detected at the time of detecting defective cans. In comparison with the case where the internal pressure of the can is measured and compared with a predetermined reference value to determine the presence or absence of decay of the contents, even if the internal pressure of the can initially varies, a determination failure occurs. The fear can be reliably eliminated.
【００２７】すなわち、液体窒素などを用いて強制的に
缶内圧を高めて缶形状を維持させる絞りしごき缶を使用
したものでは、同じ内容物で缶温度が２０℃のときの缶
内圧平均値が１．５ｋｇ／ｃｍ2 である種類の缶詰で
も、個々の缶詰については、缶内圧がその平均値から上
下０．２ｋｇ／ｃｍ2 程度のバラツキがあり、低いもの
では１．３ｋｇ／ｃｍ2 、高いものでは１．７ｋｇ／ｃ
ｍ2 程度の缶内圧値となっている。That is, in the case of using a drawn ironing can for maintaining the shape of the can by forcibly increasing the internal pressure of the can using liquid nitrogen or the like, the average value of the internal pressure of the same contents when the can temperature is 20 ° C. at 1.5 kg / cm 2 at a different canned the individual canned cans internal pressure has vertically 0.2 kg / cm 2 about the variation from the average value, is 1.3 kg / cm 2, high in low 1.7kg / c
It has a m 2 about the can internal pressure values.
【００２８】このような缶詰について１つの基準値と比
較して内容物の腐敗の有無を判定すると、例えば、缶内
圧平均値１．５ｋｇ／ｃｍ2 を基準として、一週間後に
０．３ｋｇ／ｃｍ2 以上上昇しているもの（１．８ｋｇ
／ｃｍ2 以上）については腐敗の可能性ありとした場
合、当初１．７ｋｇ／ｃｍ2 缶内圧があったものについ
ては、腐敗の恐れのない０．１ｋｇ／ｃｍ2 程度しか缶
内圧が変化していない場合でも異常ありと判定されるこ
ととなるWhen the presence or absence of decay of the contents of such a can is determined by comparing it with one reference value, for example, 0.3 kg / cm after one week based on the average value of the internal pressure of the can of 1.5 kg / cm 2. 2 or more (1.8 kg
/ Cm 2 ), if there is a possibility of decay, if the internal pressure of the can was 1.7 kg / cm 2 at the beginning, the internal pressure of the can was changed only about 0.1 kg / cm 2 without fear of decay. Even if not, it will be determined that there is an abnormality
【００２９】一方、基準値缶内圧１．５ｋｇ／ｃｍ2 に
対して、一週間後に０．４ｋｇ／ｃｍ2 以上上昇してい
るもの（１．９ｋｇ／ｃｍ2 以上）を腐敗の可能性があ
りとした場合でも、当初１．３ｋｇ／ｃｍ2 しか缶内圧
がなかったものについては、腐敗の恐れが極めて高い
０．５ｋｇ／ｃｍ2 以上缶内圧が上昇していても、未だ
異常ありとは判定されないこととなる。On the other hand, if the internal pressure of the can increased to 0.4 kg / cm 2 or more one week later (1.9 kg / cm 2 or more) with respect to the reference internal pressure of 1.5 kg / cm 2 , there is a possibility of decay. However, even if the internal pressure of the can was initially only 1.3 kg / cm 2 , it was judged that there was still an abnormality even if the internal pressure of 0.5 kg / cm 2 or more was extremely likely to rot, even if the internal pressure was increased. It will not be done.
【００３０】ところが、上記の実施例のような方法によ
れば、判定の基準となる値がそれぞれの缶毎の当初に測
定された缶内圧に基づくものであるため、当初の缶内圧
のバラツキに関係なく、個々の缶詰それぞれについて正
確な缶内圧の変化状態を把握することができる。However, according to the method as in the above embodiment, the value used as the criterion for determination is based on the initially measured can pressure inside each can. Irrespective of this, it is possible to grasp the accurate change state of the internal pressure of each can.
【００３１】さらに、上記の実施例においては、判定の
基準となる値が、当初に測定された缶内圧そのものでは
なく、所定の基準温度となったときの缶内圧を予測算出
した缶内圧補正値であるため、加熱殺菌が行われた直後
の缶詰について当初の缶内圧を測定したような場合や、
当初の缶内圧の測定時にいろいろな温度の缶詰が混在し
ているような場合でも、個々の缶詰のその後の温度変化
の幅が相違するということがあるにもかかわらず、個々
の缶詰それぞれについて正確な缶内圧の変化状態を把握
することができる。Further, in the above embodiment, the reference value for the judgment is not the can pressure itself measured at the beginning, but the can pressure correction value for predicting and calculating the can pressure at the predetermined reference temperature. Therefore, when the initial can pressure was measured for cans immediately after heat sterilization was performed,
Even when cans of various temperatures are mixed at the time of the initial measurement of the internal pressure of the can, it is possible to obtain accurate values for each of the It is possible to comprehend the changing state of the can internal pressure.
【００３２】以上、本発明の方法を一実施例に基づいて
説明したが、本発明はこのようなものに限定されるもの
ではなく、例えば、加熱殺菌後の冷却が終わってそれぞ
れの缶詰の温度が全て所定の基準温度となっているよう
な時点で当初の缶内圧の測定を行うような場合には、赤
外線温度センサ３，温度補正回路４，荷重値補正回路２
等は必要なく、荷重検出器１６からの出力を直接プリン
タコントローラ５に入力して、測定された当初の缶内圧
値そのものを缶詰１０に表示することによっても実施可
能なものであり、また、缶内圧値の印刷は缶底部に限ら
ず、缶蓋や缶胴にしても良い。Although the method of the present invention has been described based on one embodiment, the present invention is not limited to such an example. In the case where the initial can pressure is measured at the time when all of them are at the predetermined reference temperature, the infrared temperature sensor 3, the temperature correction circuit 4, the load value correction circuit 2
There is no necessity, and the present invention can be implemented by directly inputting the output from the load detector 16 to the printer controller 5 and displaying the measured initial can pressure value itself on the can 10. The printing of the internal pressure value is not limited to the bottom of the can, but may be performed on a can lid or a can body.
【００３３】さらに、上記の実施例では缶内圧の変化状
態を把握するために比較判定回路７と読取器８を用いた
が、このような自動化のための装置を用いる場合に限定
されるものではなく、作業者が肉眼で缶１０の底部１０
ｂに表示された数値等を確認し、缶内圧測定装置２１の
荷重検出器２６からの出力された缶内圧値とこれを比較
して直接腐敗等の異常の有無を判定することによっても
実施可能なものである。Further, in the above-described embodiment, the comparison / judgment circuit 7 and the reader 8 are used to grasp the change state of the can internal pressure. However, the present invention is not limited to the case of using such an apparatus for automation. The operator can visually check the bottom 10 of the can 10
It can also be carried out by checking the numerical value and the like displayed in b and comparing the can pressure value output from the load detector 26 of the can pressure measurement device 21 with this to directly determine the presence or absence of an abnormality such as rot. It is something.
【００３４】[0034]
【発明の効果】以上説明したような本発明の缶内容物の
異常検査方法によれば、缶詰の内容物の腐敗等による異
常の有無を、当初の缶内圧にバラツキがあっても、複雑
な缶内圧測定装置を使用することなく、従来の缶内圧測
定装置等を用いることにより正確に判定することができ
ると共に、スローリーク缶詰を検出することもできる。
また、当初の缶内圧値を基準温度における缶内圧値に補
正しておくことにより、加熱殺菌が行われた直後やいろ
いろな温度の缶詰が混在している状態で当初の缶内圧の
測定を行った場合についても、内容物の腐敗等による異
常の有無についての正確な判定を行うことができる。According to the method for inspecting an abnormality of can contents according to the present invention as described above, the presence or absence of an abnormality due to decay of the contents of a can is complicated even if the initial internal pressure of the can varies. The determination can be made accurately by using a conventional can internal pressure measuring device or the like without using the can internal pressure measuring device, and it is also possible to detect a slow leak can.
Also, by correcting the initial can pressure value to the can pressure value at the reference temperature, the initial can pressure can be measured immediately after heat sterilization or in a state where cans of various temperatures are mixed. In this case, it is possible to accurately determine whether there is an abnormality due to decay of the contents.
【図１】本発明の缶内容物の異常検査方法の一実施例を
実施するための装置全体の概略を示す説明図。FIG. 1 is an explanatory view schematically showing an entire apparatus for carrying out an embodiment of a method for inspecting an abnormality of can contents according to the present invention.
【図２】本発明における当初の缶内圧の測定結果が外表
面の所定箇所に表示された缶詰の一例を示す絞りしごき
缶の斜視図。FIG. 2 is a perspective view of an ironing and squeezing can showing an example of canning in which the initial measurement result of the can internal pressure in the present invention is displayed at a predetermined location on the outer surface.
２ 荷重値補正回路 ３ 赤外線温度センサ ４ 温度補正回路 ５ プリントコントローラ ６ インクジェットプリンタ ７ 比較判定回路 ８ 読取器 １０ 缶 １１ 缶内圧測定装置 １３ 受けロール １４ 測定ロール １６ 荷重検出器 ２１ 缶内圧測定装置 ２３ 受けロール ２４ 測定ロール ２６ 荷重検出器 2 Load value correction circuit 3 Infrared temperature sensor 4 Temperature correction circuit 5 Print controller 6 Inkjet printer 7 Comparison judgment circuit 8 Reader 10 Can 11 Can internal pressure measuring device 13 Receiving roll 14 Measurement roll 16 Load detector 21 Can internal pressure measuring device 23 Receiving Roll 24 Measurement roll 26 Load detector
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 7/00 G01L 5/00 G01M 3/00 ＪＩＣＳＴファイル（ＪＯＩＳ)──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) G01N 7/00 G01L 5/00 G01M 3/00 JICST file (JOIS)
Claims (2)
の缶内圧を測定して、その測定結果を個々の缶詰の外表
面の所定箇所に表示しておくと共に、当初の缶内圧の測
定時から所定時間経過後に、当該缶詰について再度缶内
圧の測定を行い、この測定結果と個々の缶詰の表面に表
示されている当初の缶内圧とを比較することにより、個
々の缶詰における内容物の異常の有無を判定することを
特徴とする缶内容物の異常検査方法。An internal pressure of a can which is filled and sealed is measured, and the measurement result is displayed at a predetermined position on an outer surface of each can, and the initial internal pressure is measured. After a lapse of a predetermined time from the time, the internal pressure of the can is measured again, and the measurement result is compared with the initial internal pressure indicated on the surface of each can to obtain the content of each can. An abnormality inspection method for can contents, which is characterized by determining the presence or absence of an abnormality.
表面温度を測定し、この缶内圧と缶表面温度の測定結果
に基づいて当該缶詰が所定の基準温度となったときの缶
内圧を予測算出した缶内圧補正値を出し、この缶内圧補
正値を測定結果として缶詰の外表面に表示しておくと共
に、所定時間経過後の缶内圧の再測定を、それらの缶詰
が所定の基準温度にある状態で行うようにしたことを特
徴とする請求項１に記載の缶内容物の異常検査方法。2. The can surface temperature is measured at substantially the same time as the initial measurement of the can internal pressure. Based on the measurement results of the can internal pressure and the can surface temperature, the can internal pressure when the can reaches a predetermined reference temperature is determined. Predicted and calculated can pressure correction value is output, and the can pressure correction value is displayed on the outer surface of the can as a measurement result, and the can pressure is re-measured after a predetermined time has passed, and the can is measured at a predetermined reference temperature. 2. The method according to claim 1, wherein the inspection is performed in the state of (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32108393A JP3251406B2 (en) | 1993-11-26 | 1993-11-26 | Abnormal inspection method for can contents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32108393A JP3251406B2 (en) | 1993-11-26 | 1993-11-26 | Abnormal inspection method for can contents |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07151665A JPH07151665A (en) | 1995-06-16 |
| JP3251406B2 true JP3251406B2 (en) | 2002-01-28 |
Family
ID=18128626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32108393A Expired - Fee Related JP3251406B2 (en) | 1993-11-26 | 1993-11-26 | Abnormal inspection method for can contents |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3251406B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11193016A (en) * | 1997-12-26 | 1999-07-21 | Toyo Seikan Kaisha Ltd | Low positive pressure canned goods and can body thereof having internal pressure inspection bearability |
-
1993
- 1993-11-26 JP JP32108393A patent/JP3251406B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07151665A (en) | 1995-06-16 |
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