JP2669280B2 - Automatic carbon dioxide concentration monitor for controlling vessel internal pressure with mixed gas - Google Patents
Automatic carbon dioxide concentration monitor for controlling vessel internal pressure with mixed gasInfo
- Publication number
- JP2669280B2 JP2669280B2 JP4310807A JP31080792A JP2669280B2 JP 2669280 B2 JP2669280 B2 JP 2669280B2 JP 4310807 A JP4310807 A JP 4310807A JP 31080792 A JP31080792 A JP 31080792A JP 2669280 B2 JP2669280 B2 JP 2669280B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon dioxide
- gas
- concentration
- mixed gas
- dioxide concentration
- 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
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Vacuum Packaging (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、炭酸ガスとその他の不
活性ガスとの混合ガスを容器のヘッドスペース充填し
て、密封後の容器内圧を制御する混合ガスによる容器内
圧制御における炭酸ガス濃度自動監視方法及びその装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention fills the head space of a container with a mixed gas of carbon dioxide gas and other inert gas, and controls the internal pressure of the container after sealing. The present invention relates to an automatic monitoring method and an automatic monitoring method.
【０００２】[0002]
【従来の技術】本発明者等は先に炭酸ガスと不活性ガス
との混合ガス（以下、単に混合ガスとする）による容器
内圧の制御方法を提供した（特開平４ー２０１８１４
号）。この方法によれば、窒素、アルゴン、ヘリウム等
の不活性ガスと炭酸ガスとの混合ガスを各種容器詰食品
の密封直前に容器内にフラッシュしてヘッドスペース内
の空気を混合ガスに置換することにより、密封後に炭酸
ガスが食品に吸収されてヘッドスペースが減少し容器内
を減圧状態にすることができると共に、食品の酸化を防
ぐことができ、混合ガスの炭酸ガス濃度を制御すること
によって容器内の減圧度を任意に制御することが可能で
ある。2. Description of the Related Art The present inventors have previously provided a method for controlling the internal pressure of a container by using a mixed gas of carbon dioxide gas and an inert gas (hereinafter, simply referred to as mixed gas) (Japanese Patent Laid-Open No. 4-201814).
issue). According to this method, a mixed gas of an inert gas such as nitrogen, argon, and helium and a carbon dioxide gas is flushed into a container immediately before sealing various packaged foods to replace the air in the headspace with the mixed gas. As a result, after sealing, carbon dioxide gas is absorbed by the food, the head space is reduced, the pressure inside the container can be reduced, and the food can be prevented from being oxidized. By controlling the carbon dioxide concentration of the mixed gas, the container can be reduced. It is possible to arbitrarily control the degree of pressure reduction within.
【０００３】上記方法において、容器内減圧状態は炭酸
ガス濃度に大きく依存し、プラスチック容器詰食品では
炭酸ガス濃度が基準値より低い場合、容器内減圧度が不
足し蓋の張りがなくなり、包装体裁が悪くなる。逆に炭
酸ガス濃度が適正濃度より高いと、容器内減圧度が高く
なり容器が潰れてしまう。一方、金属容器詰食品では、
炭酸ガス濃度が適正濃度より低いと、容器内圧度が低く
なり密封性の管理のための打検適正に不都合が生じる。[0003] In the above method, the depressurized state in the container largely depends on the carbon dioxide gas concentration. When the carbon dioxide gas concentration is lower than a reference value in a plastic packaged food, the degree of depressurization in the container is insufficient, the lid is not tight, and the packaging is cut. Becomes worse. On the other hand, if the carbon dioxide concentration is higher than the proper concentration, the degree of pressure reduction in the container will be high and the container will be crushed. On the other hand, in food packed in metal containers,
If the concentration of carbon dioxide is lower than the proper concentration, the pressure inside the container will be low, which will cause inconvenience in the appropriateness of the inspection for controlling the sealing property.
【０００４】従って、炭酸ガス濃度を常に設定された適
正濃度で供給することは非常に重要なことである。しか
しながら、従来上記方法は、ガス混合装置を充填・密封
装置に取付けるのみで行っていたため、供給される混合
ガスの炭酸ガス濃度を常に検出して監視する手段を有し
てなく、最初の設定時は適正な炭酸ガス濃度であって
も、時間の経過により濃度が変化しても、濃度の変化を
感知することができず、不適正濃度のまま供給される可
能性があった。また、極端な場合、ガス混合装置が不調
あるいは故障した場合には、設定濃度とは全く異なる濃
度の混合ガスを供給することになり、内圧不良製品を多
量に製造する危険性があった。Therefore, it is very important to always supply the carbon dioxide gas concentration at the set proper concentration. However, the above-mentioned method has conventionally been carried out only by mounting the gas mixing device on the filling / sealing device, and therefore has no means for constantly detecting and monitoring the carbon dioxide concentration of the supplied mixed gas. Even if the carbon dioxide concentration was appropriate, even if the concentration changed with the passage of time, the change in concentration could not be sensed, and there was a possibility that the carbon dioxide gas was supplied at an unsuitable concentration. In an extreme case, if the gas mixing device malfunctions or breaks down, a mixed gas having a concentration completely different from the set concentration is supplied, and there is a risk of producing a large number of products with poor internal pressure.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記従来の
混合ガスによる容器内圧制御における炭酸ガス濃度管理
の問題点を解決しようとするものであり、混合ガスの炭
酸ガス濃度を常に監視することができ、且つ混合ガスの
炭酸ガス濃度が設定された適正濃度で常に供給するよう
に混合ガスの供給を制御することができる混合ガスによ
る容器内圧制御における炭酸ガス濃度自動監視装置を提
供することを目的とする。DISCLOSURE OF THE INVENTION The present invention is intended to solve the problem of carbon dioxide concentration control in controlling the internal pressure of a container by the conventional mixed gas, and constantly monitors the carbon dioxide concentration of the mixed gas. It is possible to provide a carbon dioxide concentration automatic monitoring device for controlling the internal pressure of a container by a mixed gas, which can control the supply of the mixed gas so that the carbon dioxide concentration of the mixed gas can always be supplied at a set proper concentration. To aim.
【０００６】[0006]
【課題を解決するための手段】上記課題を全て解決する
ための本発明の混合ガスによる容器内圧制御における炭
酸ガス濃度自動監視装置は、不活性ガス供給管路と炭酸
ガス供給管路に接続された混合筒で不活性ガスと炭酸ガ
スを混合するガス混合装置に連結された混合ガス吹き出
し装置により、炭酸ガスと不活性ガスの混合ガスを容器
のヘッドスペースに充填して、密封後の容器内圧を前記
混合ガスの炭酸ガス量により制御する混合ガスによる容
器内圧制御における炭酸ガス濃度自動監視装置であっ
て、前記ガス混合装置から前記混合ガス吹き出し装置に
流出する混合ガスの炭酸ガス濃度を検出する炭酸ガスセ
ンサー、混合ガスの炭酸ガス濃度を設定する炭酸ガス濃
度設定器、炭酸ガス濃度の上限を設定する上限設定器及
び下限を設定する下限設定器、前記炭酸ガスセンサーが
検出する検出値が前記上限設定器又は下限設定器に設定
された上限設定値又は下限設定値を超えると警報を発す
る警報装置、前記炭酸ガスセンサーにより検出された炭
酸ガス検出値と前記炭酸ガス濃度設定器に設定された炭
酸ガス濃度設定値とを比較して比較値を制御量として前
記ガス混合装置の前記炭酸ガス供給管路に設けられた自
動圧力調整弁を制御する信号を送出する演算制御器から
なることを特徴とする技術手段を有している。In order to solve all the above-mentioned problems , an automatic carbon dioxide concentration monitoring device for controlling the internal pressure of a container using a mixed gas according to the present invention is provided with an inert gas supply line and a carbon dioxide.
A mixing cylinder connected to the gas supply line is used to
Mixed gas blowout connected to a gas mixing device for mixing gas
A mixed device of carbon dioxide gas and inert gas can be stored in a container
Fill the headspace of the
Volume of mixed gas controlled by the amount of carbon dioxide in the mixed gas
It is an automatic carbon dioxide concentration monitoring device for controlling internal pressure.
From the gas mixing device to the mixed gas blowing device
A carbon dioxide gas detector that detects the carbon dioxide concentration of the mixed gas flowing out.
Carbon dioxide concentration to set the carbon dioxide concentration of the sensor and mixed gas
Degree setting device, upper limit setting device for setting the upper limit of carbon dioxide concentration and
Lower limit setting device for setting the lower limit and the carbon dioxide sensor
The detection value to be detected is set in the upper limiter or lower limiter
Alarm is issued when the set upper limit or lower limit is exceeded
Alarm device, charcoal detected by the carbon dioxide sensor
Acid gas detection value and charcoal set in the carbon dioxide concentration setting device
Compare with the acid gas concentration set value and set the comparison value as the control amount before
The gas mixer of the gas mixing device is installed in the carbon dioxide gas supply line.
From the arithmetic controller that sends a signal to control the dynamic pressure regulating valve
And a technical means characterized by comprising.
【０００７】前記炭酸ガス濃度設定器は、炭酸ガスの濃
度（％）を直接設定できるものだけでなく、炭酸ガス流
量及び不活性ガス流量を別々に設定することによって、
間接的に炭酸ガス濃度を設定できるものでも良い。前記
自動流量調整器は、自動圧力調整弁や自動流量調整弁
等、炭酸ガス流量を制御できるものであれば良い。 The carbon dioxide concentration setting device is used for
Not only those that can set the degree (%) directly, but also the carbon dioxide flow
By setting the amount and the inert gas flow rate separately,
It is also possible to indirectly set the carbon dioxide concentration. Said
The automatic flow regulator is an automatic pressure control valve or automatic flow control valve.
As long as the carbon dioxide gas flow rate can be controlled, it is sufficient.
【０００８】[0008]
【作用】炭酸ガス供給管路及び窒素ガス供給管路から供[Function] Supply from the carbon dioxide gas supply line and the nitrogen gas supply line
給される炭酸ガス及び窒素ガスは、混合筒内で混合されCarbon dioxide gas and nitrogen gas to be supplied are mixed in the mixing cylinder.
混合ガスとなって混合ガス吹き出し装置に供給され、吹The mixed gas is supplied to the mixed gas blowing device and blown.
き出し前に混合ガスの炭酸ガス濃度が炭酸ガス濃度センThe carbon dioxide concentration of the mixed gas is
サーによって検出され、吹き出し中の混合ガスの炭酸ガGas of the mixed gas in the blowing air detected by
ス濃度を常に把握できる。炭酸ガスの濃度検出値と炭酸It is possible to always grasp the concentration. Carbon dioxide concentration detection value and carbon dioxide
ガス濃度設定器に設定された設定値とが比較され、そのThe set value set in the gas concentration setter is compared and the
差が制御量として自動圧力調節弁に送信されて自動圧力The difference is sent to the automatic pressure control valve as a controlled variable
弁の開度が自動的に調節され、混合ガスが常に設定されThe valve opening is automatically adjusted and the mixed gas is constantly set.
た濃度を保つようにフィードバック制御される。また、Feedback control is performed to maintain a high concentration. Also,
混合ガスの炭酸ガス濃度検出値が上限設定器又は下限設The carbon dioxide concentration detection value of the mixed gas is set to the upper limit or the lower limit.
定器に設定された設定値を超えると、演算制御器から警If the set value set in the controller is exceeded, the arithmetic controller will warn you.
報器に信号が送出されて炭酸ガス濃度異常を知らせるブA signal is sent to the alarm to notify the abnormal carbon dioxide concentration.
ザー又は警報灯が点滅する等して警報を発する。The alarm is issued by flashing the alarm or warning light.
【０００９】従って、常に適正な炭酸ガス濃度で混合ガ
スを密封充填することができ、内圧不良容器の発生を防
ぐことができる。そして、ライン稼働中に故障等により
混合ガスの炭酸ガス濃度が上限設定値又は下限設定値を
超えると、警報が発せられるので即座に対応することが
でき、内圧不良容器が大量に発生する事故を防ぐことが
できる。そして、炭酸ガス濃度設定器、上限設定器、及
び下限設定器の３つの設定器の組合せにより、混合ガス
の炭酸ガス濃度及びその許容範囲を容器や内容物に応じ
て任意に設定できるので、常に適性な制御ができ、且つ
容器の変更に対しても迅速に対応できる。 Therefore, the mixing gas is always kept at an appropriate carbon dioxide concentration.
Can be sealed and filled to prevent the occurrence of defective internal pressure containers.
Can be passed. And due to breakdown etc. during line operation
If the carbon dioxide concentration of the mixed gas exceeds the upper limit setting value or the lower limit setting value,
If it exceeds, an alarm will be issued so you can respond immediately.
It is possible to prevent the accident that a large number of defective internal pressure containers are generated.
it can. Then, the carbon dioxide concentration setter, the upper limit setter, and
And 3 lower limit setters are combined to create a mixed gas
Carbon dioxide concentration and its allowable range depending on the container and contents
Since it can be set arbitrarily, you can always perform appropriate control, and
It can respond promptly to changes in containers.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づいて詳細
に説明する。図１は、本発明の炭酸ガス濃度自動監視装
置の回路図であり、まず該回路図に基づいて本発明の炭
酸ガス濃度自動監視装置の構成を説明する。炭酸ガス供
給源及び窒素ガス供給源である炭酸ガスボンベ１及び窒
素ガスボンベ２に接続された炭酸ガス供給管路ａ及び窒
素ガス供給管路ｂに、供給ガス圧を調節して流量を調整
する手動の圧力調整弁３、３’、圧力計４、４’、流量
計５、５’、ニードル弁からなる手動流量調節弁６、
６’、自動圧力調節弁７、７’及び逆止弁８、８’がそ
れぞれ設けられ、それぞれの供給管路ａ、ｂがガス混合
筒１０に接続されてガス混合装置を構成している。炭酸
ガス供給管路ａ及び窒素ガス供給管路ｂを介して適宜の
割合で供給されるそれぞれのガスは混合筒１０内で混合
され、混合ガスとなって混合ガス供給管路ｃを介して図
３に示すようなガス置換装置に供給されるようになって
いる。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit diagram of the carbon dioxide concentration automatic monitoring apparatus of the present invention. First, the configuration of the carbon dioxide concentration automatic monitoring apparatus of the present invention will be described based on the circuit diagram. A manual operation for adjusting the supply gas pressure to adjust the flow rate to the carbon dioxide gas supply pipe a and the nitrogen gas supply pipe b connected to the carbon dioxide gas supply source 1 and the nitrogen gas supply cylinder 2 as the nitrogen gas supply source. A manual flow control valve 6 comprising a pressure control valve 3, 3 ', a pressure gauge 4, 4', a flow meter 5, 5 ', a needle valve,
6 ′, automatic pressure control valves 7, 7 ′ and check valves 8, 8 ′ are provided, and the respective supply pipelines a, b are connected to the gas mixing cylinder 10 to form a gas mixing device. The respective gases supplied at an appropriate ratio via the carbon dioxide gas supply conduit a and the nitrogen gas supply conduit b are mixed in the mixing cylinder 10 to become a mixed gas, and the mixed gas is supplied via the mixed gas supply conduit c. 3 is supplied to a gas replacement device.
【００１１】また、混合ガス供給管路ｃの下流端部近く
に炭酸ガスセンサー１５を設けて、ガス置換装置でフラ
ッシュする直前の混合ガスの炭酸ガス濃度を検出し、そ
の濃度を炭酸ガス濃度表示器２１で表示すると共に、演
算制御器１６でその検出値と予め炭酸ガス濃度設定器１
７で設定された炭酸ガス濃度と比較して、設定値との比
較値を制御量として前記自動圧力調整弁７、７’に出力
し、炭酸ガス濃度を設定された目標値に調節するように
フィードバック制御できるようになっている。また、測
定値が上限設定器１８又は下限設定器１９で設定された
設定値を超えるときは、警報器２０に出力して、警報を
発するようになっている。警報器２０としては、ブザー
やランプあるいはライン停止又はこれらの全て等、適宜
の警報手段を採用することができる。前記炭酸ガスセン
サーは、熱伝導度式サーミスタガスセンサー又は赤外線
式ガスセンサー等適宜のものが採用できる。Further, a carbon dioxide sensor 15 is provided near the downstream end of the mixed gas supply pipe c to detect the carbon dioxide concentration of the mixed gas immediately before flushing with the gas replacement device, and display the concentration. In addition to displaying it on the device 21, the detected value and the carbon dioxide concentration setting device 1 are calculated by the arithmetic controller 16 in advance.
Compared with the carbon dioxide concentration set in step 7, the comparison value with the set value is output as a control amount to the automatic pressure control valves 7, 7'to adjust the carbon dioxide concentration to the set target value. Feedback control is available. Further, when the measured value exceeds the set value set by the upper limit setter 18 or the lower limit setter 19, the measured value is output to the alarm device 20 to issue an alarm. As the alarm device 20, an appropriate alarm means such as a buzzer, a lamp, a line stop, or all of these can be adopted. As the carbon dioxide gas sensor, an appropriate one such as a thermal conductivity type thermistor gas sensor or an infrared type gas sensor can be adopted.
【００１２】図２は前記回路構成を有する炭酸ガス濃度
自動監視装置の主要部が格納されている炭酸ガス濃度自
動監視装置本体２５の外観を示している。炭酸ガス濃度
自動監視装置本体２５は、そのパネル盤２６に、前記炭
酸ガス濃度表示器２１、炭酸ガス及び窒素ガスの供給管
路ａ、ｂに設けられたそれぞれの流量計５、５’、圧力
計４、４’、自動圧力調整弁７、７’の表示部がそれぞ
れ表示されている。また、パネル盤２６には、炭酸ガス
及び窒素ガスの供給管路にそれぞれ設けられた手動圧力
調整弁３、３’、手動流量調節弁６、６’の操作ボタン
が設けられ、それらを操作できるようになっている。さ
らに、パネル盤２６には、炭酸ガス濃度設定器１７、上
限設定器１８、下限設定器１９の表示及び設定部がそれ
ぞれ設けられ、それらを設定できると共に設定値が表示
されるようになっている。さらにまた、パネル盤２６に
は、炭酸ガス濃度計のゼロ調節ボタン２７及びスパン調
節ボタン２８、警報ブザー解除ボタン２９等が設けられ
ている。次に、以上のような構成からなる本実施例の炭
酸ガス濃度自動監視装置をプラスチックの成形容器に食
品を充填密封するラインに適用した場合の実施例を図３
により説明する。FIG. 2 shows the external appearance of the main body 25 of the carbon dioxide concentration automatic monitoring device in which the main part of the carbon dioxide concentration automatic monitoring device having the above-mentioned circuit configuration is stored. The main body 25 of the carbon dioxide concentration automatic monitoring device has a panel board 26 on which the carbon dioxide concentration indicator 21, the flowmeters 5 and 5 ′ provided on the carbon dioxide and nitrogen gas supply pipes a and b, and the pressure, respectively. The display units of the total 4 and 4'and the automatic pressure regulating valves 7 and 7'are displayed. In addition, the panel board 26 is provided with operation buttons for the manual pressure adjusting valves 3 and 3 ′ and the manual flow rate adjusting valves 6 and 6 ′ provided in the carbon dioxide gas and nitrogen gas supply pipelines, respectively, and these can be operated. It is like this. Further, the panel board 26 is provided with a display unit and a setting unit of a carbon dioxide concentration setting device 17, an upper limit setting device 18, and a lower limit setting device 19, respectively, and can set them and display a set value. . Furthermore, the panel board 26 is provided with a zero adjustment button 27 and a span adjustment button 28 of a carbon dioxide concentration meter, an alarm buzzer release button 29, and the like. Next, an embodiment in which the carbon dioxide gas concentration automatic monitoring device of the present embodiment having the above-described configuration is applied to a line for filling and sealing food in a plastic molding container is shown in FIG.
This will be described below.
【００１３】成形容器３１は、コンベヤ３０によって搬
送され充填機３２によって内容物である食品が充填さ
れ、混合ガス吹き出し装置３３が配置された下部に達す
ると、該混合ガス吹き出し装置３３から連続的に吹き出
している混合ガスが開口内部に吹き込まれ、容器ヘッド
スペース内の空気が混合ガスに置換される。混合ガス吹
き出し装置の下流側には、蓋材フィルム３４が案内ロー
ラ群３５に案内されて容器搬送方向に沿って繰り出され
ており、混合ガスが充填された容器３１の開口部を覆っ
て、容器内への外部からの空気の流入を防ぎながら容器
を搬送し、下流側に配置された第１シール装置３６、第
２シール装置３７によって、蓋材フィルムがヒートシー
ルされ容器開口部が密封され、冷却プレス３８でシール
部が冷却プレスされ、カッター３９によって容器開口部
を覆った蓋材が蓋材フィルム３４から切断され、蓋材フ
ィルムのスケルトン４０は巻取ローラ４１に巻取られ
る。The molded container 31 is conveyed by the conveyor 30 and is filled with foods as contents by the filling machine 32, and reaches the lower part where the mixed gas blowing device 33 is disposed. The mixed gas being blown is blown into the opening, and the air in the container head space is replaced with the mixed gas. On the downstream side of the mixed gas blowing device, a lid material film 34 is guided by a guide roller group 35 and is fed out along the container transport direction, and covers the opening of the container 31 filled with the mixed gas, The container is conveyed while preventing the inflow of air from the outside into the inside, and the lid material film is heat-sealed by the first sealing device 36 and the second sealing device 37 arranged on the downstream side, and the container opening is sealed, The seal portion is cooled and pressed by the cooling press 38, and the lid material covering the container opening is cut from the lid material film 34 by the cutter 39, and the skeleton 40 of the lid material film is wound up by the winding roller 41.
【００１４】以上は、成形容器への食品充填密封ライン
の概略であるが、上記ラインにおいて混合ガスによる容
器内圧制御は次のようにして行われる。まず、炭酸ガス
濃度設定器１７に混合ガスの炭酸ガス濃度を設定すると
共に、上限設定器１８及び下限設定器１９に上限値及び
下限値を設定する。上限設定値及び下限設定値は通常炭
酸ガスの±２〜５％程度である。炭酸ガス及び窒素ガス
が炭酸ガスボンベ１、窒素ガスボンベ２から炭酸ガス供
給管路ａ及び窒素ガス供給管路ｂに供給されると、まず
圧力計４、４’を見ながら手動圧力調節弁３、３’を操
作して炭酸ガス流及び窒素ガス流を所定の圧力に設定す
る。次いで、炭酸ガス及び窒素ガスの手動流量調節弁
６、６’を全開にして、炭酸ガス及び窒素ガスをガス混
合筒１０に供給する。炭酸ガス及び窒素ガスは、ガス混
合筒内で混合され混合ガスとなって混合ガス供給管路ｃ
を介して混合ガス吹き出し装置３３から吹き出される
が、吹き出し直前の混合ガスの炭酸ガス濃度を炭酸ガス
濃度センサー１５によって検出し、該検出値は演算制御
器１６に入力され、炭酸ガス濃度表示器２１に表示され
る。従って、吹き出し中の混合ガスの炭酸ガス濃度を常
に把握できる。また、炭酸ガスの濃度検出値と炭酸ガス
濃度設定器１７に設定された設定値とが比較され、その
差が制御量として自動圧力調節弁７、７’に送信されて
その開度を自動的に調節し、混合ガスが常に設定された
濃度を保つようにフィードバック制御される。また、混
合ガスの炭酸ガス濃度検出値が上限設定器１８又は下限
設定器１９に設定された設定値を超えると、演算制御器
から警報器２０に信号が送出されて炭酸ガス濃度異常を
知らせるブザー又は警報灯が点滅する等して警報を発す
る。The above is the outline of the food filling and sealing line for the molded container. In the above line, the control of the internal pressure of the container by the mixed gas is performed as follows. First, the carbon dioxide concentration of the mixed gas is set in the carbon dioxide concentration setter 17, and the upper limit and the lower limit are set in the upper limit setter 18 and the lower limit setter 19. The upper limit setting value and the lower limit setting value are usually about ± 2 to 5% of carbon dioxide gas. When carbon dioxide gas and nitrogen gas are supplied from the carbon dioxide gas cylinder 1 and the nitrogen gas cylinder 2 to the carbon dioxide gas supply pipe line a and the nitrogen gas supply pipe line b, first, the manual pressure control valves 3, 3 are observed while observing the pressure gauges 4, 4 '. 'To set the carbon dioxide gas flow and the nitrogen gas flow to predetermined pressures. Next, the carbon dioxide and nitrogen gas manual flow rate control valves 6 and 6 ′ are fully opened to supply carbon dioxide and nitrogen gas to the gas mixing cylinder 10. The carbon dioxide gas and the nitrogen gas are mixed in the gas mixing cylinder to become a mixed gas, and the mixed gas supply pipe c
Is blown out of the mixed gas blowout device 33 through the sensor, the carbon dioxide concentration of the mixed gas immediately before the blowout is detected by the carbon dioxide concentration sensor 15, and the detected value is input to the arithmetic and control unit 16 and the carbon dioxide concentration display 21 is displayed. Therefore, the concentration of carbon dioxide gas in the mixed gas being blown can be always grasped. Further, the detected concentration of carbon dioxide and the set value set in the carbon dioxide concentration setter 17 are compared, and the difference is transmitted to the automatic pressure control valves 7, 7'as a control amount to automatically adjust the opening degree. And the feedback control is performed so that the mixed gas always maintains the set concentration. Further, when the detected value of the carbon dioxide concentration of the mixed gas exceeds the set value set in the upper limiter 18 or the lower limiter 19, a signal is sent from the arithmetic and control unit to the alarm device 20 to notify the alarm of the abnormal carbon dioxide concentration. Or, an alarm is emitted by flashing an alarm light.
【００１５】従って、稼働開始時には、混合ガスの炭酸
ガス濃度が適正濃度に達して警報器の作動が停止した段
階で、充填ラインの稼働を開始すれば、稼働開始から適
正内圧で充填密封することができる。そして、ライン稼
働中に故障等により混合ガスの炭酸ガス濃度が上限設定
値又は下限設定値を超えて警報が発せられると、同時に
充填ラインが自動的に停止するようにすれば、内圧不良
容器が大量に発生する事故を自動的に防ぐことができ
る。Therefore, at the start of the operation, when the operation of the filling line is started at the stage where the concentration of carbon dioxide in the mixed gas reaches the appropriate concentration and the operation of the alarm device is stopped, the filling and sealing at the appropriate internal pressure from the start of the operation can be performed. You can Then, if the carbon dioxide gas concentration of the mixed gas exceeds the upper limit set value or the lower limit set value due to a failure or the like during the line operation and an alarm is issued, at the same time, the filling line is automatically stopped, so that the container having a poor internal pressure can be obtained. Accidents that occur in large numbers can be automatically prevented.
【００１６】以上、本発明の好適な一実施例を示した
が、本発明は上記実施例に限るものでなく、その技術的
思想の範囲内で種々の設計変更が可能である。例えば、
上記実施例では、炭酸ガスの濃度の調節を炭酸ガス供給
管路及び窒素ガス供給管路に設けられた自動圧力調節弁
７、７’の開度を制御することによって行ったが、もち
ろん炭酸ガス供給管路に設けられた自動圧力調節弁７の
開度のみを制御するようにしても良い。また炭酸ガス供
給管路及び窒素ガス供給管路のそれぞれのガス流量を演
算制御器からの信号により制御するものは、必ずしも自
動圧力調節弁に限らず、自動的にガス流量を制御できる
ものであれば、如何なる形態のものであっても良い。The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the technical idea thereof. For example,
In the above embodiment, the concentration of carbon dioxide was adjusted by controlling the opening degrees of the automatic pressure control valves 7 and 7 ′ provided in the carbon dioxide supply pipeline and the nitrogen gas supply pipeline. You may make it control only the opening degree of the automatic pressure control valve 7 provided in the supply line. Further, the device for controlling the gas flow rate of each of the carbon dioxide gas supply line and the nitrogen gas supply line by the signal from the arithmetic controller is not necessarily limited to the automatic pressure control valve, but may be one that can automatically control the gas flow rate. However, it may have any form.
【００１７】また、炭酸ガス濃度設定器として、直接炭
酸ガスの濃度（％）設定できるものの代わりに、炭酸ガ
ス流量設定器と窒素ガス流量設定器とを設けて、炭酸ガ
ス流量と窒素ガス流量を設定して両者の流量割合を制御
することによって炭酸ガス濃度を設定できるようにする
ことも可能である。さらに炭酸ガス濃度自動監視装置の
稼働開始時の一定濃度に達するまでのガスの無駄を省く
ために、ガス混合筒の下流にタンクを設けて、該タンク
に炭酸ガスセンサーを取付け、混合ガスが設定された一
定濃度に達してから混合ガス吹き出し装置に供給するよ
うにすることも可能である。さらに、混合ガスは、コス
トの安価な炭酸ガス・窒素ガス系が最も一般的である
が、この他に、炭酸ガス・アルゴン系や炭酸ガス・ヘリ
ウム系等も可能である。また、ヘリウムは高価であるた
め、特殊なガス系として、炭酸ガス・窒素ガス・低濃度
のヘリウムの３種類のガスを使用することも可能であ
る。混合ガスにヘリウムを使用することによって、充填
密封後の容器の微細漏れの検出が可能となり、シールの
完全性を管理することが可能となる。Further, as the carbon dioxide concentration setting device, a carbon dioxide gas flow rate setting device and a nitrogen gas flow rate setting device are provided in place of the one which can set the concentration (%) of carbon dioxide gas directly, and the carbon dioxide gas flow amount and the nitrogen gas flow amount are set. It is also possible to set the carbon dioxide concentration by setting and controlling the flow rate ratio of both. Furthermore, in order to avoid waste of gas until reaching a certain concentration at the start of operation of the automatic carbon dioxide concentration monitoring device, a tank is provided downstream of the gas mixing cylinder, a carbon dioxide sensor is attached to the tank, and the mixed gas is set. It is also possible to supply the mixed gas to the mixed gas blowing device after the predetermined concentration is reached. Further, as the mixed gas, carbon dioxide / nitrogen gas system, which is low in cost, is most common, but other than this, carbon dioxide / argon system or carbon dioxide / helium system is also possible. Further, since helium is expensive, it is possible to use three kinds of gases of carbon dioxide gas, nitrogen gas, and low-concentration helium as a special gas system. By using helium as the mixed gas, it becomes possible to detect minute leaks in the container after filling and sealing, and it becomes possible to control the integrity of the seal.
【００１８】[0018]
【発明の効果】本発明は、次のような格別の効果を奏す
る。混合ガスの炭酸ガス濃度が常に検出されるので、吹
き出し中の混合ガスの炭酸ガス濃度を常に把握すること
ができる。また、炭酸ガスの濃度検出値と予め設定され
た炭酸ガス濃度設定値とが比較され、その差により自動
圧力弁の開度が自動的に調節されるので、常に設定され
た適正濃度を維持して混合ガスを容器に吹き込むことが
でき、内圧不良容器の発生を防ぐことができる。ライン
稼働中に故障等により混合ガスの炭酸ガス濃度が上限設
定値又は下限設定値を超えると、警報が発せられるので
即座に対応することができ、内圧不良容器が大量に発生
する事故を防ぐことができる。炭酸ガス濃度設定器、上
限設定器、及び下限設定器の３つの設定器の組合せによ
り、混合ガスの炭酸ガス濃度及びその許容範囲を容器や
内容物に応じて任意に設定できるので、常に適性な制御
ができ、且つ容器の変更に対しても迅速に対応できる。
装置が簡単であり、従来の窒素ガス置換包装装置等に簡
単に適用でき、且つ維持管理も容易である。The present invention has the following special effects. Since the carbon dioxide concentration of the mixed gas is always detected, the carbon dioxide concentration of the mixed gas being blown can be always grasped. In addition, the detected carbon dioxide concentration is compared with the preset carbon dioxide concentration set value, and the opening of the automatic pressure valve is automatically adjusted according to the difference, so that the set proper concentration is always maintained. As a result, the mixed gas can be blown into the container, and the generation of a container having a defective internal pressure can be prevented. If the concentration of carbon dioxide in the mixed gas exceeds the upper limit or lower limit due to a failure during line operation, an alarm will be issued so that it is possible to respond immediately and prevent accidents that cause a large number of containers with poor internal pressure. You can Carbon dioxide concentration setting device, upper
By combining the three limiters, the limit setter and the lower limit setter
The concentration of carbon dioxide gas in the mixed gas and its allowable range
Since it can be set arbitrarily according to the contents, it is always suitable control
In addition, it is possible to quickly respond to changes in the container.
The device is simple, it can be easily applied to the conventional nitrogen gas displacement packaging device, and the maintenance is easy.
【図１】本発明の実施例である炭酸ガス濃度自動監視装
置の回路図である。FIG. 1 is a circuit diagram of a carbon dioxide gas concentration automatic monitoring apparatus according to an embodiment of the present invention.
【図２】炭酸ガス濃度自動監視装置本体の概略斜視図で
ある。FIG. 2 is a schematic perspective view of a main body of an automatic carbon dioxide concentration monitor.
【図３】プラスチック成形容器への食品充填ラインに本
発明の実施例である炭酸ガス濃度自動監視装置を適用し
た状態のライン構成説明図である。FIG. 3 is an explanatory diagram of a line configuration in a state where the carbon dioxide concentration automatic monitoring device according to the embodiment of the present invention is applied to a food filling line for a plastic molded container.
７、７’ 自動圧力調節弁 １０ ガス混合
筒 １５ 炭酸ガスセンサー １７ 炭酸ガス
センサー １８ 上限設定器 １９ 下限設定
器 ２０ 警報器 ２１ 炭酸ガス
濃度表示器 ２５ 炭酸ガス濃度自動監視装置本体7, 7'Automatic pressure control valve 10 Gas mixing cylinder 15 Carbon dioxide sensor 17 Carbon dioxide sensor 18 Upper limit setting device 19 Lower limit setting device 20 Alarm device 21 Carbon dioxide concentration indicator 25 Carbon dioxide concentration automatic monitoring device body
Claims (1)
に接続された混合筒で不活性ガスと炭酸ガスを混合する
ガス混合装置に連結された混合ガス吹き出し装置によ
り、炭酸ガスと不活性ガスの混合ガスを容器のヘッドス
ペースに充填して、密封後の容器内圧を前記混合ガスの
炭酸ガス量により制御する混合ガスによる容器内圧制御
における炭酸ガス濃度自動監視装置であって、前記ガス
混合装置から前記混合ガス吹き出し装置に流出する混合
ガスの炭酸ガス濃度を検出する炭酸ガスセンサー、混合
ガスの炭酸ガス濃度を設定する炭酸ガス濃度設定器、炭
酸ガス濃度の上限を設定する上限設定器及び下限を設定
する下限設定器、前記炭酸ガスセンサーが検出する検出
値が前記上限設定器又は下限設定器に設定された上限設
定値又は下限設定値を超えると警報を発する警報装置、
前記炭酸ガスセンサーにより検出された炭酸ガス検出値
と前記炭酸ガス濃度設定器に設定された炭酸ガス濃度設
定値とを比較して比較値を制御量として前記ガス混合装
置の前記炭酸ガス供給管路に設けられた自動圧力調整弁
を制御する信号を送出する演算制御器からなることを特
徴とする混合ガスによる容器内圧制御における炭酸ガス
濃度自動監視装置。1. An inert gas supply line and a carbon dioxide gas supply line
Mix the inert gas and carbon dioxide with the mixing cylinder connected to
The mixed gas blowing device connected to the gas mixing device
The mixed gas of carbon dioxide gas and inert gas to the container heads.
After filling the pace, the internal pressure of the container after sealing is adjusted to
Control of vessel internal pressure by mixed gas controlled by carbon dioxide amount
For monitoring the concentration of carbon dioxide gas in
Mixing flowing from the mixing device to the mixed gas blowing device
Carbon dioxide sensor for detecting carbon dioxide concentration of gas, mixed
Carbon dioxide concentration setter to set the carbon dioxide concentration of the gas, charcoal
Set upper limit setter and lower limit to set upper limit of acid gas concentration
Lower limit setting device, detection detected by the carbon dioxide sensor
The upper limit value whose value is set in the upper limit setter or lower limit setter
An alarm device that issues an alarm when a fixed value or a lower limit setting value is exceeded,
Carbon dioxide detection value detected by the carbon dioxide sensor
And the carbon dioxide concentration setting set in the carbon dioxide concentration setting device.
The gas mixing device is compared with a fixed value and the comparative value is used as a controlled variable.
Pressure control valve installed in the carbon dioxide gas supply line
It consists of an arithmetic controller that sends out a signal to control
Carbon dioxide in the control of vessel internal pressure by the mixed gas to be collected
Automatic concentration monitoring device .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4310807A JP2669280B2 (en) | 1992-10-27 | 1992-10-27 | Automatic carbon dioxide concentration monitor for controlling vessel internal pressure with mixed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4310807A JP2669280B2 (en) | 1992-10-27 | 1992-10-27 | Automatic carbon dioxide concentration monitor for controlling vessel internal pressure with mixed gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06135415A JPH06135415A (en) | 1994-05-17 |
| JP2669280B2 true JP2669280B2 (en) | 1997-10-27 |
Family
ID=18009665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4310807A Expired - Fee Related JP2669280B2 (en) | 1992-10-27 | 1992-10-27 | Automatic carbon dioxide concentration monitor for controlling vessel internal pressure with mixed gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2669280B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007153406A (en) * | 2005-12-06 | 2007-06-21 | Toyo Seikan Kaisha Ltd | Gas replacing and sealing device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01321508A (en) * | 1988-06-23 | 1989-12-27 | Kojima Seisakusho:Kk | Oxygen density controller |
| JPH0457780A (en) * | 1990-06-20 | 1992-02-25 | Sumitomo Seika Chem Co Ltd | Container and transportation method using same |
| JPH0790847B2 (en) * | 1990-11-29 | 1995-10-04 | 東洋製罐株式会社 | Control method of vessel internal pressure by mixed gas |
| JP2836971B2 (en) * | 1990-12-26 | 1998-12-14 | 三菱重工業株式会社 | Rotary beverage filling machine |
-
1992
- 1992-10-27 JP JP4310807A patent/JP2669280B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06135415A (en) | 1994-05-17 |
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