JPH01148956A - Seam detecting apparatus for metal can - Google Patents
Seam detecting apparatus for metal canInfo
- Publication number
- JPH01148956A JPH01148956A JP30788687A JP30788687A JPH01148956A JP H01148956 A JPH01148956 A JP H01148956A JP 30788687 A JP30788687 A JP 30788687A JP 30788687 A JP30788687 A JP 30788687A JP H01148956 A JPH01148956 A JP H01148956A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- coil
- impedance
- detection coil
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 31
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for detecting bonded parts of metal cans used in vending machines and the like that heat metal cans by induction.
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, vending machines and the like have been developed that use induction heating to heat a metal can to heat drinking water or the like inside the can. However, in such a vending machine, etc., the metal cans to be heated have various can diameters, so the device must be compatible with these. Therefore, the inventor has proposed using a semi-circular heating coil instead of a cylindrical one, on which the side surface of the metal can is placed for heating. Such a heating method has an excellent feature in that it can be heated 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、缶底面または缶入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 described above, when the adhesive part of the metal can comes to the heating surface, since this part is insulated by the adhesive, there is a possibility that the bottom of the can or the inner surface of the can and the can Abnormal heating occurs concentrated in the area where it overlaps with the side surface, resulting in burning. Therefore, it is desirable to detect the adhesive part of the metal can and prevent it from coming into contact with the heating surface. However, until now there has been no detection device that meets this requirement.
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 has been made in response to the above-mentioned demands, and an object of the present invention is to provide an apparatus that can reliably inspect whether a metal can is bonded or not.
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、金属缶に近接して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, the metal can adhesive detection device of the present invention includes a detection coil disposed close to the metal can, and a portion of the metal can facing the detection coil. and an impedance determination circuit that determines whether or not the detection coil is a bonded portion based on the impedance of the detection coil.
作 用
この構成により本発明の金痛缶の接着部検知装置は、検
知フィルのインピーダンスを判定することによシ検知コ
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。Operation With this configuration, the metal can adhesive part detection device of the present invention can detect whether or not the part of the metal can that the detection coil faces is a bonded part by determining the impedance of the detection fill. Can be done.
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。EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram of a metal can adhesive detection device 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、６は共振コンデンサ４０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。In FIG. 1, 1 is a metal can having an adhesive joint 1a, 2 is a detection coil wound around a ferrite core 3 and placed close to the metal can 1, and 4 is a resonant capacitor connected in series to the detection coil 2. , 6 is a voltage dividing circuit that divides the voltage vc across the resonant capacitor 40, and is composed of a resistor 6 and a resistor 7.
８はピークホールド回路で、ダイオード９とコンデンサ
１ｏ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，Ｖ
ｐ（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ｆの交流電圧ｖｓを供給する交流電源であ
る。8 is a peak hold circuit, which is composed of a diode 9 and a capacitor 1o. 11 is a reference voltage source, 12 is a peak hold circuit 8 output voltage vP and a voltage VR of the reference voltage source 11 are compared, and if vP>vR, HIGH, V
p (is a comparator that outputs LOW in the case of VR. 13 is an AC power source that supplies an AC voltage vs of frequency f to a series circuit of the detection coil 2 and the resonant capacitor 4.
そして、上記した各部４〜１３によシ検知コイル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。The above-mentioned parts 4 to 13 constitute an impedance determination circuit that determines the impedance of the detection coil 2.
第２図は、本実施例における交流電源１３０周波数ｆ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ｆと出力電圧Ｖｐの関係を示し、破線は接着部１
ａでない部分における周波数ｆど出力電圧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ｆ−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ｑによって
かなり変化するが、ｆ＝ｆ１ とすることにより接着部
１ａにおけるｇ＝Ｑ胴、ｑ＝３鵬。FIG. 2 is a graph showing the characteristics of the frequency f of the AC power supply 130 and the output voltage vP of the peak hold circuit 8 in this embodiment. In FIG. 2, the solid line indicates the relationship between the frequency f and the output voltage Vp at the bonded portion 1a, and the broken line indicates the relationship between the frequency f and the output voltage Vp at the bonded portion 1a.
It shows the relationship between the frequency f and the output voltage vP in a portion other than a. In the adhesive part 1a and the part other than the adhesive part 1a,
Since the impedance of the detection coil 2 changes, f-VP
Causes differences in characteristics. As shown in FIG. 2, this characteristic changes considerably depending on the gap q between the metal can 1 and the ferrite core 3, but by setting f=f1, g=Q body and q=3peng at the bonded part 1a. .
ｑ＝１０ｍｍでのｖＰはそれぞれｖａｏ、ｖＲ３，ｖａ
ｌ。vP at q=10mm is vao, vR3, va, respectively.
l.
となり、接着部１ａでない部分におけるｑ” Ｏｆｆ１
ｍ ＋９＝ ３ｆｆ’ｍ ＋ ｑ＝ １０１１１ｍでの
ｖＰはそれぞれ”ｂｏ １ｖｂｓ”ｂｌｏ となる・
このため基準電圧源１１の電圧ＶＲをｖａｌ。＞ｖＲ＞
ｖｂｌ。とすることにより、０≦ｑ≦１０．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
なシ、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。q” Off1 in the part that is not the adhesive part 1a
vP at m+9=3ff'm+q=10111m becomes "bo 1vbs"blo. Therefore, the voltage VR of the reference voltage source 11 is val. ＞vR＞
vbl. By setting, 0≦q≦10. If the output of the comparator 12 is HIGH at the bonded portion 1a in the range , it is possible to detect that the bonded portion is a bonded portion. For example, if the detection of the adhesive part 1a is performed while rotating the metal can 1 by another means, the adhesive part 1a can be easily detected.
At this detection position, the adhesive portion 1a may be placed away from the heating surface.
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 this embodiment, the voltage across the resonant capacitor 4 is detected, but the current may also be detected, or the voltage or current of the detection coil 2 may be detected, and at least one of these may be detected. It would be good if it could 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 this embodiment, the detection coil 2 is provided in a rod-shaped ferrite core, but it may be air-core, and even if a core is used, it may be U-shaped, U-shaped, E-shaped, etc.
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 need to be limited to a sine wave; for example, a square wave or a triangular wave may be used, and a frequency higher than the peak of vP may be used. In short, the bonded portion 1a and the bonded portion 1a It is sufficient if there is a difference in output in other areas.
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 clear from the above-mentioned embodiments, the metal can bonded part detection device of the present invention is provided with a detection coil, and by changing the impedance of the detection coil, the part of the metal can facing the detection coil detects the bonded part. This is a device that can detect whether or not it is, and can meet the needs of the past.
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。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名ｊ；
−−−ｗｆ回路
Ｃ２７−玖仇
８−−−じ−クホール）″Ｃ］路FIG. 1 is a circuit diagram of a metal can adhesive detection device according to an embodiment of the present invention, and FIG. 2 is a diagram showing the characteristics of the AC power frequency and peak hold circuit output voltage of the same device. 1...Metal can, 1a...Adhesive part, 2.
...Detection coil. Name of agent: Patent attorney Toshio Nakao and one other person
---wf circuit C27-Ku 8--J-ku hole)''C] path
Claims (2)
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 having a detection coil disposed close to a metal can, and an impedance determination circuit that determines whether or not a portion of the metal can facing the detection coil is an adhesive portion, based on the impedance of the detection coil. Can adhesive detection device.
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) The impedance determination circuit detects at least one of the voltage or current of the detection coil and the voltage or current of a resonant capacitor connected to the detection coil, and determines whether the value is within a predetermined range. Claim 1
A device for detecting bonded parts of metal cans as described in 2.
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 true JPH01148956A (en) | 1989-06-12 |
| JP2506860B2 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 (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 |
| JPH03127483A (en) * | 1989-10-11 | 1991-05-30 | Denki Kogyo Co Ltd | Heating method of canned food |
| JPH0844946A (en) * | 1995-06-30 | 1996-02-16 | Fuji Electric Co Ltd | Controller of automatic vending machine |
| US5521498A (en) * | 1992-06-17 | 1996-05-28 | G.D S.P.A. | Device for sensing the thickness of strip material in particular in devices for changing rolls of metallized strip material automatically |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210014482A (en) * | 2019-07-30 | 2021-02-09 | 주식회사 엘지화학 | Method for testing resistance welding part of battery using eddy current signal |
Citations (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
Patent Citations (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 |
Cited By (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 |
| JPH03127483A (en) * | 1989-10-11 | 1991-05-30 | Denki Kogyo Co Ltd | Heating method of canned food |
| US5521498A (en) * | 1992-06-17 | 1996-05-28 | G.D S.P.A. | Device for sensing the thickness of strip material in particular in devices for changing rolls of metallized strip material automatically |
| JPH0844946A (en) * | 1995-06-30 | 1996-02-16 | Fuji Electric Co Ltd | Controller of automatic vending machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2506860B2 (en) | 1996-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080402 Year of fee payment: 12 |