JP2506860B2 - Metal can adhesion part detection device - Google Patents
Metal can adhesion part detection deviceInfo
- Publication number
- JP2506860B2 JP2506860B2 JP62307886A JP30788687A JP2506860B2 JP 2506860 B2 JP2506860 B2 JP 2506860B2 JP 62307886 A JP62307886 A JP 62307886A JP 30788687 A JP30788687 A JP 30788687A JP 2506860 B2 JP2506860 B2 JP 2506860B2
- Authority
- JP
- Japan
- Prior art keywords
- metal
- detection coil
- voltage
- impedance
- 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.)
- Expired - Lifetime
Links
Landscapes
- Vending Machines For Individual Products (AREA)
- General Induction Heating (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は金属缶を誘導加熱する自動販売機等に用いる
金属缶の接着部検知装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting a bonded portion of a metal can, which is used in an automatic vending machine for induction heating a metal can.
従来の技術 近年、誘導加熱を利用して金属缶を加熱しその内部の
飲料水等を加熱するような自動販売機等が考えられてい
る。しかし、このような自動販売機等においては、加熱
する金属缶はその缶径が種々異なるため、これらに対応
するものでなければならない。そのため加熱コイルとし
ては円筒状ではなく半円弧形のものを用い、この上に金
属缶の側面を載せて加熱するようにしたものを発明者は
提案している。このような加熱方式では、金属缶の缶径
が一定なものでなくても加熱することができるというす
ぐれた特徴を有する。2. Description of the Related Art In recent years, there has been considered an automatic vending machine or the like that uses induction heating to heat a metal can to heat drinking water and the like therein. However, in such a vending machine or the like, the metal cans to be heated have different can diameters, and therefore must be compatible with them. Therefore, the inventor has proposed that the heating coil is not a cylindrical shape but a semi-circular shape, and the side surface of the metal can is placed on the heating coil for heating. Such a heating method has an excellent feature that heating can be performed even if the diameter of the metal can is not constant.
発明が解決しようとする問題点 ところが、上記のような加熱方式では、金属缶の接着
部が加熱面にくると、この部分は接着剤により絶縁され
ているため、缶底面または缶天面と缶側面との重なり合
う箇所に集中して異常加熱を起しこげつきが生ずる。そ
のため、金属缶の接着部を検知し、これが加熱面にこな
いようにすることが望まれる。しかしながら、この要請
を満たすための検知装置はこれまでなかった。Problems to be Solved by the Invention However, in the heating method as described above, when the adhesion part of the metal can comes to the heating surface, since this part is insulated by the adhesive, the can bottom surface or the can top surface and the can Concentrated in the area where it overlaps with the side surface, abnormal heating occurs, causing sticking. Therefore, it is desired to detect the bonded portion of the metal can and prevent it from coming into contact with the heating surface. However, no detection device has hitherto been available for satisfying this demand.
本発明は上記のような要請にこたえるもので、金属缶
の接着部か否かを確実に検完する装置を提供することを
目的とするものである。The present invention meets the above demands, and an object of the present invention is to provide an apparatus for surely detecting whether or not it is an adhesive portion of a metal can.
問題点を解決するための手段 上記目的を達成するために、本発明の金属缶の接着部
検知装置は、誘導加熱により加熱される金属缶と、この
金属缶に近接しかつ誘導加熱による加熱面から離れた位
置に配置した検知コイルと、前記検知コイルに対向する
金属缶の部分が接着部であるか否かを、前記検知コイル
のインピーダンスによって判定するインピーダンス判定
回路とを有するものである。Means for Solving the Problems In order to achieve the above object, a device for detecting an adhesive portion of a metal can according to the present invention includes a metal can heated by induction heating, and a heating surface adjacent to the metal can and heated by induction heating. The detection coil is provided at a position distant from the detection coil, and an impedance determination circuit that determines whether or not the portion of the metal can facing the detection coil is an adhesive portion based on the impedance of the detection coil.
作用 この構成により本発明の金属缶の接着部検知装置は、
検知コイルのインピーダンスを判定することにより検知
コイルの対向する金属缶の部分が接着部であるか否かを
検知することができる。With this configuration, the device for detecting a bonded portion of a metal can of the present invention is
By determining the impedance of the detection coil, it is possible to detect whether or not the portion of the metal can facing the detection coil is the adhesive portion.
実施例 以下本発明の一実施例について図面を参照しながら説
明する。第１図は本発明の一実施例における金属缶の接
着部検知装置の回路図である。Embodiment One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram of an adhesion part detection device for a metal can according to an embodiment of the present invention.
第１図において、１は接着剤による接合部1aを有する
金属缶、２はフェライトコア３に巻かれ金属缶１に近接
して配置した検知コイル、４は検知コイル２に直列に接
続した共振コンデンサ、５は共振コンデンサ４の両端の
電圧VCを分圧する分圧回路で、抵抗６および抵抗７で構
成している。８はピークホールド回路で、ダイオード９
とコンデンサ10で構成している。11は基準電圧源、12は
ピークホールド回路８の出力電圧VPと基準電圧源11の電
圧VRを比較し、VP＞VRである場合にはHIGH、VP＜VRであ
る場合にはLOWを出力するコンパレータである。13は検
知コイル２と共振コンデンサ４の直列回路に周波数の
交流電圧VSを供給する交流電源である。そして、上記し
た各部４〜13により検知コイル２のインピーダンスを判
定するインピーダンス判定回路を構成している。In FIG. 1, 1 is a metal can having a joint 1a made of an adhesive, 2 is a detection coil wound around a ferrite core 3 and arranged in the vicinity of the metal can 1, and 4 is a resonance capacitor connected in series to the detection coil 2. Reference numeral 5 denotes a voltage dividing circuit for dividing the voltage V C across the resonance capacitor 4, which is composed of a resistor 6 and a resistor 7. 8 is a peak hold circuit, which is a diode 9
And a capacitor 10. 11 is a reference voltage source, 12 is a comparison between the output voltage V P of the peak hold circuit 8 and the voltage V R of the reference voltage source 11, and when V P > V R is HIGH, when V P <V R Is a comparator that outputs LOW. Reference numeral 13 is an AC power supply that supplies an AC voltage V S of a frequency to the series circuit of the detection coil 2 and the resonance capacitor 4. Then, the above-mentioned respective parts 4 to 13 constitute an impedance determination circuit for determining the impedance of the detection coil 2.
第２図は、本実施例における交流電源13の周波数と
ピークホールド回路８の出力電圧VPの特性を示したグラ
フである。第２図において実線は接着部1aにおける周波
数と出力電圧VPの関係を示し、破線は接着部1aでない
部分における周波数と出力電圧VPの関係を示してい
る。接着部1aと接着部1aでない部分では、検知コイル２
のインピーダンスが変化するため−VP特性に差を生じ
る。第２図に示したように、この特性は金属缶１とフェ
ライトコア３の間のギャップｇによってかなり変化する
が、＝1とすることにより接着部1aにおけるｇ＝0m
m,g＝3mm,g＝10mmでのVPはそれぞれVa0，Va3，Va10とな
り、接着部1aでない部分におけるｇ＝0mm,g＝3mm,g＝10
mmでのVPはそれぞれVb0，Vb3，Vb10となる。FIG. 2 is a graph showing the characteristics of the frequency of the AC power supply 13 and the output voltage V P of the peak hold circuit 8 in this embodiment. In Figure 2 the solid line indicates the relationship between the frequency and the output voltage V P at the adhesive portion 1a, the broken line indicates the relationship between the output voltage V P and the frequency in the portions not bonded portion 1a. In the bonded portion 1a and the non-bonded portion 1a, the detection coil 2
Because the impedance of changes the −V P characteristic. As shown in FIG. 2, this characteristic changes considerably depending on the gap g between the metal can 1 and the ferrite core 3, but by setting = 1 , g = 0 m at the bonded portion 1a.
V p at m, g = 3 mm, g = 10 mm becomes V a0 , V a3 , and V a10 , respectively, and g = 0 mm, g = 3 mm, g = 10 in the non-bonded portion 1a.
V P in mm is V b0 , V b3 , and V b10 , respectively.
このため基準電圧源11の電圧VRをVa10＞VR＞Vb10とす
ることにより、０≦ｇ≦10mmの範囲において接着部1aで
コンパレータ12の出力がHIGHとなり、接着部であること
を検知することができる。接着部1aの検知は例えば金属
缶１を別な手段で回転させながら行えば、接着部1aを容
易に検知することができ、この検知位置では接着部1aが
加熱面から離れるように配属しておけばよい。Therefore, by setting the voltage V R of the reference voltage source 11 to V a10 > V R > V b10 , the output of the comparator 12 becomes HIGH at the adhesive portion 1a within the range of 0 ≦ g ≦ 10 mm, and it is confirmed that it is an adhesive portion. Can be detected. The adhesion part 1a can be easily detected by rotating the metal can 1 by another means, for example, and the adhesion part 1a can be easily separated from the heating surface at this detection position. You can leave it.
なお本実施例では、共振コンデンサ４の両端の電圧を
検出しているが、電流を検出してもよく、また検知コイ
ル２の電圧または電流を検知してもよく、これらのうち
の少なくとも１つを検出するようになればよい。In the present embodiment, the voltage across the resonance capacitor 4 is detected, but the current may be detected, or the voltage or current of the detection coil 2 may be detected, and at least one of them may be detected. Should be detected.
また本実施例では、棒状のフェライトコアに検知コイ
ル２を設けているが、別に空心でも良く、コアを用いる
場合でもコの字形、Ｕ字形、Ｅ形なども考えられる。Further, in the present embodiment, the detection coil 2 is provided on the rod-shaped ferrite core, but an air core may be separately provided, and even when the core is used, a U-shape, a U-shape, an E-shape or the like may be considered.
また交流電源13の出力電圧についても正弦波だけなく
てもよく、例えば方形波、三角波でも良いし、周波数に
ついてもVPのピークよりも高い周波数を用いてもよく、
要するに接着部1aと接着部1a以外の部分での出力に差が
あればよい。Further, the output voltage of the AC power supply 13 does not have to be a sine wave, and may be, for example, a square wave or a triangular wave, and the frequency may be higher than the peak of V P.
In short, it suffices if there is a difference in output between the adhesive portion 1a and the portion other than the adhesive portion 1a.
発明の効果 以上の実施例からも明らかなように、本発明の金属缶
の接着部検知装置は、検知コイルを設け、そのインピー
ダンスの変化によって、前記検知コイルに対向する金属
缶の部分が接着部であるか否かを検知することができる
ものであって、これまでの要請にこたえることができる
ものである。EFFECTS OF THE INVENTION As is apparent from the above embodiments, the metal can adhesive portion detection device of the present invention is provided with a detection coil, and a portion of the metal can facing the detection coil is attached to the adhesive portion due to a change in impedance thereof. It is possible to detect whether or not it is, and it is possible to meet the requests so far.
第１図は本発明の一実施例における金属缶の接着部検知
装置の回路図、第２図は同装置の交流電源周波数とピー
クホールド回路出力電圧の特性を示す図である。 １……金属缶、1a……接着部、２……検知コイル。FIG. 1 is a circuit diagram of a device for detecting a bonded portion of a metal can in one embodiment of the present invention, and FIG. 2 is a diagram showing characteristics of an AC power source frequency and a peak hold circuit output voltage of the device. 1 ... Metal can, 1a ... Adhesive part, 2 ... Detection coil.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 遠藤 勝己 大阪府東大阪市高井田本通３丁目22番地 松下冷機株式会社内 (72)発明者 萩本 剛夫 大阪府東大阪市高井田本通３丁目22番地 松下冷機株式会社内 (56)参考文献 特開 昭63−53401（ＪＰ，Ａ) 特公 平７−3800（ＪＰ，Ｂ２) 特公 昭62−37514（ＪＰ，Ｂ２) 実公 昭57−49918（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Katsumi Endo 3-22 Takaidahondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigeration Co., Ltd. Matsushita Refrigeration Co., Ltd. (56) Reference JP-A-63-53401 (JP, A) JP-B 7-3800 (JP, B2) JP-B 62-37514 (JP, B2) JP-B 57-49918 ( JP, Y2)
Claims (2)
金属缶に近接しかつ誘導加熱による加熱面から離れた位
置に配置した検知コイルと、前記検知コイルに対向する
金属缶の部分が接着部であるか否かを、前記検知コイル
のインピーダンスによって判定するインピーダンス判定
回路とを有する金属缶の接着部検知装置。1. A metal can which is heated by induction heating, a detection coil which is arranged close to the metal can and apart from a heating surface by induction heating, and a portion of the metal can which faces the detection coil are bonded to each other. A device for detecting a bonded portion of a metal can, which has an impedance determination circuit for determining whether or not it is a portion based on the impedance of the detection coil.
電圧または電流、前記検知コイルに接続された共振コン
デンサの電圧または電流の少なくとも１つを検出し、そ
の値が所定の範囲にあるか否かを判定する特許請求の範
囲第１項記載の金属缶の接着部検知装置。2. An impedance determination circuit detects at least one of a voltage or a current of a detection coil and a voltage or a current of a resonance capacitor connected to the detection coil, and determines whether the value is within a predetermined range. The device for detecting an adhesive portion of a metal can according to claim 1, wherein the determination is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62307886A JP2506860B2 (en) | 1987-12-04 | 1987-12-04 | Metal can adhesion part detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62307886A JP2506860B2 (en) | 1987-12-04 | 1987-12-04 | Metal can adhesion part detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01148956A JPH01148956A (en) | 1989-06-12 |
| JP2506860B2 true JP2506860B2 (en) | 1996-06-12 |
Family
ID=17974347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62307886A Expired - Lifetime JP2506860B2 (en) | 1987-12-04 | 1987-12-04 | Metal can adhesion part detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2506860B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022525864A (en) * | 2019-07-30 | 2022-05-20 | エルジー エナジー ソリューション リミテッド | Quality evaluation method for resistance welding of batteries using the characteristics of eddy current signals |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02130695A (en) * | 1988-11-10 | 1990-05-18 | Fuji Electric Co Ltd | Joint detecting method for drink can in automatic vending machine |
| JPH0719648B2 (en) * | 1989-10-11 | 1995-03-06 | 電気興業株式会社 | How to heat canned food |
| IT1257835B (en) * | 1992-06-17 | 1996-02-13 | Gd Spa | TAPE MATERIAL THICKNESS DETECTOR DEVICE, IN PARTICULAR IN DEVICES FOR THE AUTOMATIC CHANGE OF METALLIC TAPE MATERIAL SPOOLS |
| JPH0844946A (en) * | 1995-06-30 | 1996-02-16 | Fuji Electric Co Ltd | Controller of automatic vending machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6353401A (en) * | 1986-08-25 | 1988-03-07 | Toyo Seikan Kaisha Ltd | Circumferential ruggedness detector for metal body |
-
1987
- 1987-12-04 JP JP62307886A patent/JP2506860B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022525864A (en) * | 2019-07-30 | 2022-05-20 | エルジー エナジー ソリューション リミテッド | Quality evaluation method for resistance welding of batteries using the characteristics of eddy current signals |
| JP7152618B2 (en) | 2019-07-30 | 2022-10-12 | エルジー エナジー ソリューション リミテッド | Quality Evaluation Method of Battery Resistance Welding Using Characteristics of Eddy Current Signals |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01148956A (en) | 1989-06-12 |
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