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JP2000228280A - Induction heating apparatus - Google Patents

Induction heating apparatus

Info

Publication number
JP2000228280A
JP2000228280A JP11030983A JP3098399A JP2000228280A JP 2000228280 A JP2000228280 A JP 2000228280A JP 11030983 A JP11030983 A JP 11030983A JP 3098399 A JP3098399 A JP 3098399A JP 2000228280 A JP2000228280 A JP 2000228280A
Authority
JP
Japan
Prior art keywords
electrode
frequency oscillator
low
electrode unit
dielectric heating
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.)
Withdrawn
Application number
JP11030983A
Other languages
Japanese (ja)
Inventor
Hideo Kurashima
秀夫 倉島
Eki Murakami
恵喜 村上
Shoichi Inaba
正一 稲葉
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP11030983A priority Critical patent/JP2000228280A/en
Publication of JP2000228280A publication Critical patent/JP2000228280A/en
Withdrawn legal-status Critical Current

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  • Constitution Of High-Frequency Heating (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating apparatus capable of efficiently and uniformly heating without producing an unheated part, even if a high frequency oscillator is disposed far away from an induction heating electrode. SOLUTION: A low voltage electrode element 16 can be grounded separately from a high frequency oscillator 1 by connecting an electrode unit 3 having the low voltage electrode element 16 and a high voltage electrode element 17 alternately arranged on it to the high frequency oscillator 1 through a resonator 2 having a secondary coil 7 spatially coupled with a primary coil 5. Thereby, even if the electrode unit 3 is located far away from the high frequency oscillator 1, the low voltage electrode side potential of the electrode unit 3 can be kept at the earth potential.

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、誘電加熱装置、特
に段ボール製造ラインで段ボールシート段頂部の糊を加
熱するのに好適な誘電加熱装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric heating apparatus, and more particularly to a dielectric heating apparatus suitable for heating glue at the top of a corrugated sheet in a corrugated board production line.

【0002】[0002]

【従来の技術】従来、段ボール製造ラインで段ボールシ
ート段頂部の糊を誘電加熱装置により加熱することは公
知である(例えば、特開昭62−70034号、特開平
1−136734号)。従来、使用されている誘電加熱
装置は、例えば、表ライナーが通過する側に誘電加熱電
極である格子電極の(+)極と(−)極を交互に配置
し、該電極を高周波発振器の出力端子に直接接続して、
両電極間に高周波交番電圧を印加することにより、電界
を発生させて糊を誘電加熱するようになっている。
2. Description of the Related Art Conventionally, it is known that a glue at the top of a corrugated cardboard sheet is heated by a dielectric heating device in a corrugated cardboard production line (for example, Japanese Patent Application Laid-Open Nos. 62-70034 and 1-136733). Conventionally, a dielectric heating apparatus used, for example, arranges (+) poles and (-) poles of a grid electrode, which is a dielectric heating electrode, alternately on the side where a front liner passes, and connects the electrodes to the output of a high-frequency oscillator. Connect directly to the terminal
By applying a high-frequency alternating voltage between both electrodes, an electric field is generated and the paste is dielectrically heated.

【0003】[0003]

【発明が解決しようとする課題】段ボール製造ラインで
は、貼合部の長さ等装置の配置関係で高周波発振器と誘
電加熱電極をかなり離して(例えば2m以上)配置しな
ければならない場合が多い。そのような場合、高周波発
振器と誘電加熱電極がすぐ近くに配置されている場合と
比べて、加熱効率が悪く糊の未加熱部分が多く生じ、表
ライナーの接着不良部分が生じる欠点がある。
In a corrugated cardboard production line, the high frequency oscillator and the dielectric heating electrode must often be arranged at a considerable distance (for example, 2 m or more) due to the arrangement of the devices such as the length of the bonding portion. In such a case, as compared with the case where the high-frequency oscillator and the dielectric heating electrode are arranged in the immediate vicinity, there is a disadvantage that the heating efficiency is poor and many unheated portions of the glue are generated and the adhesion failure portion of the surface liner is generated.

【0004】本発明は、上記欠点を解消するために創案
されたものであって、高周波発振器と誘電加熱電極を遠
く離して配置しても、近接して配置した場合と同様に、
未加熱部分を生じることなく効率良く均一に加熱できる
誘電加熱装置を提供することを目的とするものである。
The present invention has been made in order to solve the above-mentioned drawbacks. Even when the high-frequency oscillator and the dielectric heating electrode are arranged far apart, as in the case where they are arranged close to each other,
It is an object of the present invention to provide a dielectric heating device capable of efficiently and uniformly heating without generating an unheated portion.

【0005】[0005]

【課題を解決するための手段】本発明者は、高周波発振
器と誘電加熱電極を遠く離れて配置した場合に生じる未
加熱部分を種々調べた結果、低圧側電極素子周辺に未加
熱部分が多く生じていることが判明した。その原因は、
従来発振機と電極がマッチング回路を介して直接的に結
合され、発振機のアースに電極の低圧電極側が直接つな
がっているため、高周波発振機と電極が遠く離れている
場合、電極の低圧側電極の電位がアース電位(0電位)
より上がってしまうことにあることが分かった。即ち、
低圧側電極の電位が0電位より上がってしまうと、電界
の低圧側は、電極側の近傍のアースされたフレームに影
響にされて、実際の低圧側電極よりもアースされたフレ
ーム側に引き込まれ、低圧側電極の上部に位置する糊に
電界が作用しなくなり、その部分が加熱されなくなるこ
とにある。従って、上記問題点を解決するには、電極の
低圧側電位を0電位に保ち、高圧側電極と低圧側電極と
の間に正確に所望の電界を生じさせれば良いことを知得
し、本発明に到達したものである。
The inventor of the present invention has conducted various studies on unheated portions generated when a high-frequency oscillator and a dielectric heating electrode are arranged far apart, and as a result, many unheated portions are generated around the low-voltage side electrode element. Turned out to be. The cause is
Since the conventional oscillator and the electrode are directly connected via a matching circuit, and the low-voltage electrode side of the electrode is directly connected to the ground of the oscillator, if the high-frequency oscillator and the electrode are far apart, the low-voltage electrode of the electrode Potential is ground potential (0 potential)
It turned out that it was going up. That is,
When the potential of the low-voltage side electrode rises above zero potential, the low-voltage side of the electric field is influenced by the grounded frame near the electrode side, and is drawn to the frame side that is grounded more than the actual low-voltage side electrode. In addition, the electric field does not act on the glue located above the low-voltage side electrode, and the portion is not heated. Therefore, in order to solve the above problems, it is known that the low voltage side potential of the electrode is maintained at 0 potential, and a desired electric field may be accurately generated between the high voltage side electrode and the low voltage side electrode. The present invention has been reached.

【0006】即ち、上記問題点を解決する本発明の誘電
加熱装置は、低圧側電極素子と高圧側電極素子が交互に
配列された電極ユニットと高周波発振機とが、トランス
結合された共振器を介して接続され、前記電極ユニット
の低圧側電極素子を前記高周波発振機と別途に接地して
なることを特徴とするものである。
In other words, the dielectric heating apparatus of the present invention which solves the above-mentioned problems comprises a resonator in which an electrode unit in which low-voltage side electrode elements and high-voltage side electrode elements are alternately arranged and a high-frequency oscillator are transformer-coupled. The low-voltage side electrode element of the electrode unit is grounded separately from the high-frequency oscillator.

【0007】前記共振器は、一次コイルとコンデンサが
並列接続され、二次コイルが前記一次コイルと空間的に
結合してなり、前記一次コイルとコンデンサの並列接続
部における低圧接続点と高圧接続点が前記高周波発振器
の出力端子に接続されているのが望ましい。そして、前
記電極ユニットは金属製架台に組み込まれた低圧側電極
素子と高圧側電極素子を櫛形に交互に配列して構成し、
該電極ユニットを段ボール貼合装置の段ボール貼合部に
段ボール通過路下面に配置することによって、段ボール
貼合装置における段ボール加熱装置として好適に採用で
きる。
In the resonator, a primary coil and a capacitor are connected in parallel, a secondary coil is spatially coupled to the primary coil, and a low voltage connection point and a high voltage connection point in a parallel connection portion of the primary coil and the capacitor are provided. Is preferably connected to the output terminal of the high-frequency oscillator. The electrode unit is configured by alternately arranging low-voltage side electrode elements and high-voltage side electrode elements incorporated in a metal frame in a comb shape,
By arranging the electrode unit on the lower surface of the corrugated cardboard passage in the corrugated cardboard laminating part of the corrugated corrugated cardboard, it can be suitably used as a corrugated cardboard heating device in the corrugated corrugated cardboard.

【0008】[0008]

【発明の実施の形態】以下、本発明の実施形態を詳細に
説明する。図1は本発明の誘電加熱装置の概念図であ
り、図中、1は高周波発振機、2は共振器、3は電極ユ
ニットである。高周波発振器は、従来と同様なのものが
採用でき、本実施例では真空管を使用した高周波発振器
を採用した。共振器3は、一次コイル5とコンデンサ6
が並列接続され、二次コイル7が前記一次コイルと空間
的に結合されたトランス結合をなし、二次コイル7を一
次コイル5に対して変位させることにより、インピーダ
ンスをマッチングさせている。一次コイルとコンデンサ
の並列接続部における低圧接続点9と高圧接続点10が
高周波発振機1の出力端子に接続されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a conceptual diagram of a dielectric heating apparatus according to the present invention, in which 1 is a high-frequency oscillator, 2 is a resonator, and 3 is an electrode unit. A high-frequency oscillator similar to the conventional one can be used. In this embodiment, a high-frequency oscillator using a vacuum tube is used. The resonator 3 includes a primary coil 5 and a capacitor 6
Are connected in parallel, the secondary coil 7 forms a transformer coupling spatially coupled with the primary coil, and the secondary coil 7 is displaced with respect to the primary coil 5 to match the impedance. The low voltage connection point 9 and the high voltage connection point 10 in the parallel connection of the primary coil and the capacitor are connected to the output terminal of the high frequency oscillator 1.

【0009】電極ユニット3は、架台15に組み込まれ
ている低圧電極素子16と高圧電極素子17が櫛形に交
互に平面的に配列され、低圧電極接続点18と高圧電極
接続点19がそれぞれ共振器の二次コイル7の低圧側と
高圧側に接続されている。前記低圧電極素子16は、適
宜位置でアース20され、それによって常に0電位を保
つように構成されている。本発明の誘電加熱装置を段ボ
ールの貼合装置に適用する場合、電極ユニット3は、例
えばダブルフェーサー部で、シングルフェーサーに重ね
合わされた状態の表ライナーが該電極ユニット上を通過
することにより、中芯段頂の糊が全面的に加熱されるよ
うに、ダブルフェーサーの幅よりも大きく形成されて貼
合部のダブルフェーサー通過路下面に配置される。
In the electrode unit 3, low-voltage electrode elements 16 and high-voltage electrode elements 17 incorporated in a gantry 15 are alternately arranged in a comb shape in a plane, and a low-voltage electrode connection point 18 and a high-voltage electrode connection point 19 are respectively connected to a resonator. Are connected to the low voltage side and the high voltage side of the secondary coil 7. The low-voltage electrode element 16 is grounded at an appropriate position so that it is always kept at zero potential. When the dielectric heating device of the present invention is applied to a corrugated cardboard bonding device, the electrode unit 3 is, for example, a double facer portion, in which a front liner in a state of being superimposed on a single facer passes over the electrode unit. The width of the double facer is formed larger than the width of the double facer so that the glue at the top of the center step is entirely heated, and is arranged on the lower surface of the double facer passageway of the bonding portion.

【0010】本実施形態の誘電加熱装置は、以上のよう
に構成され、電極ユニット3を高周波発振器1と共振器
2を介してトランス結合(誘導結合)することにより、
高周波発振機1と別個に電極ユニットをアースすること
が可能となった。その結果、電極ユニット3と高周波発
振器1との距離が離れていても、電極ユニットの低圧電
極素子の電位を0電位に保つことができ、低圧電極素子
と高圧電極素子間に被加熱物を効率良く加熱することが
できるような所望の電界を形成することができる。
The dielectric heating device according to the present embodiment is configured as described above, and the electrode unit 3 is transformer-coupled (inductively coupled) to the high-frequency oscillator 1 via the resonator 2.
The electrode unit can be grounded separately from the high-frequency oscillator 1. As a result, even if the distance between the electrode unit 3 and the high-frequency oscillator 1 is large, the potential of the low-voltage electrode element of the electrode unit can be kept at 0 potential, and the object to be heated can be efficiently placed between the low-voltage electrode element and the high-voltage electrode element. A desired electric field that can be heated well can be formed.

【0011】[0011]

【実施例】段ボール貼合装置において、ダブルフェーサ
ーの加熱装置として、上記実施形態の誘電加熱装置を採
用して、高周波発振器1と電極ユニット3を3メートル
離し、その間に共振器2を設けて配置して、停止した状
態でシングルフェーサーに表ライナーを貼合させてダブ
ルフェーサーを実験的に製造した。十分に乾燥後に、表
ライナーをシングルフェーサーから剥がして、表ライナ
ー紙片の中芯上への付着状況を観察することによって、
段ボールシート段頂部の糊の加熱状況を評価した。その
結果、図2(a)に模式的に示すように、段ボールシー
ト25の段頂部への表ライナー片26の付着が略段ボー
ルシート全面にあり、略全面的に均一に加熱され、接着
不良個所が殆どないことが確認された。
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the corrugated cardboard bonding apparatus, the dielectric heating apparatus of the above embodiment is adopted as the heating apparatus for the double facer, the high-frequency oscillator 1 is separated from the electrode unit 3 by 3 meters, and the resonator 2 is provided therebetween. A double facer was experimentally manufactured by placing and stopping the surface liner on a single facer in a stopped state. After drying sufficiently, peel off the front liner from the single facer and observe the state of adhesion on the core of the front liner paper,
The heating status of the glue at the top of the corrugated cardboard sheet was evaluated. As a result, as schematically shown in FIG. 2A, the surface liner piece 26 adheres to the top of the corrugated cardboard sheet 25 over substantially the entire corrugated cardboard sheet, and is heated substantially uniformly over substantially the entire corrugated cardboard sheet. It was confirmed that there was almost no.

【0012】また、比較例として、電極ユニットを従来
と同様に高周波発振器にマッチング回路を介して直列的
に接合した以外は上記実施例とまったく同様な条件で、
同様な実験を行った。その結果、表ライナーはシングル
フェーサーから容易に剥がれ、図2(b)に示すよう
に、段ボールシート25の段頂部への表ライナーの残留
付着片は実施例の場合と比べて非常に少なかった。特
に、低圧電極素子の上方に位置した部分への付着が少な
かった。そのことは、その部分が十分に加熱されてない
ために接着不良となっていることを意味する。従って、
従来の誘電加熱装置よれば、段ボールシート全面を均一
に加熱することは困難であり、特に低圧電極素子の上方
に未加熱部分が生じることが確認された。
As a comparative example, the electrode unit was connected in series to a high-frequency oscillator via a matching circuit in the same manner as in the prior art, under exactly the same conditions as in the above embodiment.
A similar experiment was performed. As a result, the surface liner was easily peeled off from the single facer, and as shown in FIG. 2 (b), the amount of the remaining adhered pieces of the surface liner on the top of the corrugated cardboard sheet 25 was very small as compared with the case of the example. . In particular, adhesion to the portion located above the low voltage electrode element was small. This means that the part is not sufficiently heated, resulting in poor adhesion. Therefore,
According to the conventional dielectric heating device, it is difficult to uniformly heat the entire corrugated cardboard sheet, and it has been confirmed that an unheated portion is generated especially above the low-voltage electrode element.

【0013】以上の実験結果により、本発明の誘電加熱
装置によれば、高周波発振器と電極ユニットがかなり離
れていても、段ボールシートを効率良く均一に加熱する
ことができ、段ボール貼合装置の加熱装置として、従来
の誘電加熱装置に比べて特段に優れていることが確認さ
れた。
According to the above experimental results, according to the dielectric heating apparatus of the present invention, even if the high-frequency oscillator and the electrode unit are far apart, the corrugated board sheet can be efficiently and uniformly heated, and the heating of the corrugated board laminating apparatus can be performed. It was confirmed that the device was particularly excellent as compared with the conventional dielectric heating device.

【0014】以上、本発明の好適な実施形態について説
明したが、本発明は上記実施形態に限るものでなく、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、電極ユニットは、必ずしも低圧電極素子と高圧
電極素子が平面的に交互に配置されている場合に限ら
ず、立体的に配置されている電極ユニットの場合も適用
可能である。また、共振器及び高周波発振器の具体的構
造は上記実施例のものに限らず、種々の構造のものが採
用可能である。
Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various design changes can be made within the scope of the technical idea.
For example, the electrode unit is not necessarily limited to the case where the low-voltage electrode elements and the high-voltage electrode elements are alternately arranged in a plane, but may be applied to the case where the electrode units are arranged three-dimensionally. Further, the specific structures of the resonator and the high-frequency oscillator are not limited to those of the above-described embodiment, and various structures may be employed.

【0015】[0015]

【発明の効果】以上、本発明によれば、電極ユニットの
低圧電極側をアースすることが可能となったので、高周
波発振器と電極ユニットをかなり離して設置しても、低
圧電極素子の電位をアース電位に保つことができ、低圧
電極素子と高圧電極素子間に所望通りの電界を形成する
ことができ、被加熱物を効率良く加熱することができ
る。また、構造が簡単であり従来の誘電加熱装置に容易
に且つ安全に適用でき、安価に提供できる。そして、本
発明の誘電加熱装置を採用することによって、段ボール
を均一に加熱でき、接着不良のない段ボールを得ること
ができる。
As described above, according to the present invention, the low-voltage electrode side of the electrode unit can be grounded. Therefore, even if the high-frequency oscillator and the electrode unit are installed at a considerable distance, the potential of the low-voltage electrode element can be reduced. It can be maintained at the ground potential, a desired electric field can be formed between the low-voltage electrode element and the high-voltage electrode element, and the object to be heated can be efficiently heated. In addition, the structure is simple, can be easily and safely applied to a conventional dielectric heating device, and can be provided at low cost. Then, by employing the dielectric heating device of the present invention, the cardboard can be heated uniformly, and a cardboard free from poor adhesion can be obtained.

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

【図1】本発明の実施形態に係る誘電加熱装置の概念図
である。
FIG. 1 is a conceptual diagram of a dielectric heating device according to an embodiment of the present invention.

【図2】段ボール貼合装置によって製造された段ボール
シートから表ライナーを剥がして表ライナー片の中芯段
頂への付着状況を示す模式図であり、(a)は図1に示
す装置を使用した実施例の場合、(b)は従来の装置を
使用した比較例の場合を示している。
FIG. 2 is a schematic diagram showing the state of adhesion of a surface liner piece to the middle step of a core by peeling a surface liner from a corrugated cardboard sheet manufactured by a corrugated cardboard laminating apparatus, wherein (a) uses the apparatus shown in FIG. (B) shows the case of the comparative example using the conventional apparatus.

【符号の説明】[Explanation of symbols]

1 高周波発振器 2 共振器 3 電極ユニット 5 一次コイル 6 コンデンサ 7 二次コイル 9 低圧接続点 10 高圧接続点 15 架台 16 低圧電極
素子 17 高圧電極素子 18 低圧電極
接続点 19 高圧電極接続点
DESCRIPTION OF SYMBOLS 1 High frequency oscillator 2 Resonator 3 Electrode unit 5 Primary coil 6 Capacitor 7 Secondary coil 9 Low voltage connection point 10 High voltage connection point 15 Base 16 Low voltage electrode element 17 High voltage electrode element 18 Low voltage electrode connection point 19 High voltage electrode connection point

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 低圧側電極素子と高圧側電極素子が交互
に配列された電極ユニットと高周波発振機とが、トラン
ス結合された共振器を介して接続され、前記電極ユニッ
トの低圧側電極素子を前記高周波発振機と別途に接地し
てなることを特徴とする誘電加熱装置。
An electrode unit in which low-voltage side electrode elements and high-voltage side electrode elements are alternately arranged and a high-frequency oscillator are connected via a transformer-coupled resonator, and a low-voltage side electrode element of the electrode unit is connected to the electrode unit. A dielectric heating device, which is grounded separately from the high-frequency oscillator.
【請求項2】 前記共振器は、一次コイルとコンデンサ
が並列接続され、二次コイルが前記一次コイルに空間的
に結合している共振器であり、前記一次コイルとコンデ
ンサの並列接続部における低圧接続点と高圧接続点が前
記高周波発振器の出力端子に接続されている請求項1記
載の誘電加熱装置。
2. The resonator according to claim 1, wherein a primary coil and a capacitor are connected in parallel, and a secondary coil is spatially coupled to the primary coil. 2. The dielectric heating device according to claim 1, wherein a connection point and a high voltage connection point are connected to an output terminal of the high frequency oscillator.
【請求項3】 前記電極ユニットは架台に組み込まれた
低圧側電極素子と高圧側電極素子が櫛形に交互に配列さ
れた電極ユニットであり、該電極ユニットが段ボール貼
合装置の段ボール貼合部の段ボールシート通過路下面に
配置される段ボール加熱用である請求項1又は2記載の
誘電加熱装置。
3. An electrode unit in which low-voltage side electrode elements and high-voltage side electrode elements incorporated in a gantry are alternately arranged in a comb shape. 3. The dielectric heating apparatus according to claim 1, wherein the dielectric heating apparatus is for heating a corrugated cardboard disposed on a lower surface of a corrugated cardboard sheet passage.
JP11030983A 1999-02-09 1999-02-09 Induction heating apparatus Withdrawn JP2000228280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11030983A JP2000228280A (en) 1999-02-09 1999-02-09 Induction heating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11030983A JP2000228280A (en) 1999-02-09 1999-02-09 Induction heating apparatus

Publications (1)

Publication Number Publication Date
JP2000228280A true JP2000228280A (en) 2000-08-15

Family

ID=12318882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11030983A Withdrawn JP2000228280A (en) 1999-02-09 1999-02-09 Induction heating apparatus

Country Status (1)

Country Link
JP (1) JP2000228280A (en)

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