JPH062525B2 - Mark detection device for can lid - Google Patents
Mark detection device for can lidInfo
- Publication number
- JPH062525B2 JPH062525B2 JP59028698A JP2869884A JPH062525B2 JP H062525 B2 JPH062525 B2 JP H062525B2 JP 59028698 A JP59028698 A JP 59028698A JP 2869884 A JP2869884 A JP 2869884A JP H062525 B2 JPH062525 B2 JP H062525B2
- Authority
- JP
- Japan
- Prior art keywords
- lid
- light
- mark
- reflected light
- reflection type
- 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
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10831—Arrangement of optical elements, e.g. lenses, mirrors, prisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/02—Articles
- B65G2201/0235—Containers
- B65G2201/0244—Bottles
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Artificial Intelligence (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Attitude Control For Articles On Conveyors (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Discharge Of Articles From Conveyors (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は缶の表裏検出装置、特に缶の箱詰のため缶の
表裏を検出しこれを揃えるためのラインに用いられるマ
ーク検出装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front and back detection device for a can, and more particularly to a mark detection device used for a line for detecting the front and back of a can and aligning it for packaging the can.
（従来技術） 内容物を充填した缶詰缶、いわゆる実缶は、バラ積でレ
トルト殺菌された後、箱詰される場合には、缶の刻印、
捺印、印刷等により総ての缶の表裏が揃った状態となる
ように整列させられていた。この整列作業は従来手作業
によって行なわれていた。しかし、コスト高をさけるた
め、光電センサーにより缶蓋の刻印等を読取り、表を向
けている缶と裏を向けている缶とをコンベヤ上で振り分
け、どちらかの缶列を反転させることによってこの整列
作業を自動化する装置が本発明者によって提案された。(Prior Art) Canned cans filled with contents, so-called real cans, are stamped on the cans when they are packaged in boxes after being sterilized by retort in bulk.
All the cans were arranged so that the front and back sides were aligned by marking, printing, or the like. This alignment work has conventionally been performed manually. However, in order to avoid high cost, by reading the markings on the can lid with a photoelectric sensor, sorting the can facing the front and the can facing the back on the conveyor, and reversing either can row A device for automating the alignment work has been proposed by the present inventor.
この装置の光電センサーは、光源と光検出部を内蔵した
同軸反射型ファイバーを用い、第１図のように、缶１の
缶蓋に垂直にセンサー２を配置し、落射照明光が缶蓋で
反射された反射光を検出し、その強弱によって刻印等の
マークの有無を検出するものである。The photoelectric sensor of this device uses a coaxial reflection type fiber with a built-in light source and photodetector. As shown in FIG. 1, the sensor 2 is arranged vertically to the can lid of the can 1, and the epi-illumination light is emitted from the can lid. The reflected light reflected is detected, and the presence or absence of a mark such as an engraved mark is detected based on the strength of the reflected light.
この装置は良好に作動し、缶の整列の自動化を達成出来
たが、判別精度が８割程度に止まっていた。This device worked well and was able to achieve automation of can alignment, but the accuracy of discrimination was only about 80%.
（発明の目的） この発明は、マークセンサーの改良により、判別精度を
ほぼ１００％に迄高めた缶整列装置を得ようとするもの
である。(Object of the Invention) The present invention is intended to obtain a can aligning device whose discrimination accuracy is improved to almost 100% by improving a mark sensor.
（発明の構成） 以下図面を参照して詳細に説明する。(Structure of the Invention) Hereinafter, a detailed description will be given with reference to the drawings.
上記の判別精度を低下するのは、主として次の２つの理
由による。The reason why the discrimination accuracy is lowered is mainly due to the following two reasons.
マークセンサーのヘッド部からの投光スポットは、
検出面上、約２mm径の大きさであるため、缶蓋上のマー
クの配列によっては、第２図に示すように、マークの間
をスポットが通り抜けてしまい、マークを検出しない場
合が生ずる。The light spot from the mark sensor head is
Since the diameter is about 2 mm on the detection surface, depending on the arrangement of the marks on the can lid, as shown in FIG. 2, a spot may pass between the marks and the marks may not be detected.
缶蓋に傷、打痕等があれば、これにより光が散乱さ
れ、検出光が弱くなり、マークがないのにマーク有との
検出結果を出してしまう。If the can lid has scratches, dents, etc., the light is scattered by this, and the detection light becomes weak, and a detection result indicating that there is a mark is present even if there is no mark.
場合により、コンベヤのゆれ等で缶蓋面の傾斜が生ずる
と、反射光がうまく受光部にもどらない場合が生じ、こ
れは缶蓋と、検出ヘッドの距離が大になるとその影響が
大きくなる。In some cases, when the can lid surface is tilted due to the shake of the conveyor, the reflected light may not return to the light receiving part properly, and this has a large effect when the distance between the can lid and the detection head becomes large.
上記のうち、まず、第２の影響をさけるためには、第３
図に示すように、検出ヘッド２を缶蓋１に対して傾斜さ
せて配置し、同図(a)に示すように無刻印部からの正反
射光は受光せず、同図(b)に示すように刻印1′による乱
反射光のみを受光するようにする。一般に、缶蓋に生ず
る傷は刻印等に比して小さく、これによる乱反射光の強
度は刻印等による乱反射光に比してはるかに弱い。また
打痕は、刻印等に比べてその反射面の傾斜はゆるいの
で、ヘッド２の傾斜角θを適当に選ぶことによって、打
痕からの反射光を受けないようにするのは容易である。Of the above, first, to avoid the second effect, the third
As shown in the figure, the detection head 2 is arranged so as to be inclined with respect to the can lid 1, and the specularly reflected light from the unmarked portion is not received as shown in the figure (a). As shown, only the diffusely reflected light by the marking 1'is received. In general, the scratches that occur on the can lid are smaller than those on the marking, and the intensity of the diffusely reflected light due to this is much weaker than that on the irregularly reflected light due to the marking or the like. Further, since the dent has a gentler inclination of its reflecting surface than that of an inscription, it is easy to prevent reflected light from the nick by appropriately selecting the inclination angle θ of the head 2.
また、コンベアのゆれ等による傾斜は更にゆるく、打痕
の影響を受けない設置角θでは、この影響は全く受けな
いこととなる。Further, the inclination due to the shake of the conveyor is further gentle, and at the installation angle θ where there is no influence of the dent, this influence is not affected at all.
更に、前記の問題は、ヘッド２を複数使用することで
解決出来る。１本のセンサーが第２図に示す状態になっ
たとしても、他のセンサーが同時に同じ状態となる確率
は極めて小さいためである。Further, the above problem can be solved by using a plurality of heads 2. This is because even if one sensor is in the state shown in FIG. 2, the probability that other sensors are in the same state at the same time is extremely small.
実際には、市販のセンサーのヘッドは一定の太さを持
ち、刻印の大きさも定められているため、市販のセンサ
ー、２本を使用すると、ヘッド間の設定距離Ａにもよる
が、第４図のように何れのヘッドも検出出来ない場合を
生ずる。In practice, the head of a commercially available sensor has a certain thickness, and the size of the marking is also defined. Therefore, if two commercially available sensors are used, it depends on the set distance A between the heads. As shown in the figure, there occurs a case where neither head can be detected.
しかし、第５図に示すような３ヘッドとすることにより
上記の欠点を除き、ほぼ１００％の検出精度を得ること
が出来た。However, by using three heads as shown in FIG. 5, almost 100% of detection accuracy could be obtained except the above-mentioned drawbacks.
しかし、これらの結果は刻印の大きさ、配列検出ヘッド
の太さ、配列等により変化することは云う迄もない。However, it goes without saying that these results vary depending on the size of the marking, the thickness of the array detection head, the array, and the like.
第６図は、この発明の表裏検出装置の１実施例を示し、
缶整列装置に取付けられる支持腕３に側面人形のブラケ
ット４に、左右対称に支持腕３の軸に対しθ、この実施
例では２3゜傾いた検出ヘッド５、5′、5″が取付けられ
ている。その光軸は側面図(a)で平行、正面図(b)で一点
に交わるように、すなわち、直線６上にスポットを結ぶ
ように調整され、この直線６が通過する缶蓋の面に一致
するように支持腕３が取付けられる。缶蓋面上で照明光
のスポットが一直線上に並ぶことは、検出開始位置Ｂ、
検出終了位置Ｃを確定するために必要である。FIG. 6 shows an embodiment of the front and back detecting device of the present invention,
The detection heads 5, 5 ', 5 "are attached to the support arm 3 attached to the can aligning device, to the bracket 4 of the side doll, and symmetrically with respect to the axis of the support arm 3 by θ, which is 23 ° in this embodiment. Its optical axis is adjusted so that it is parallel in the side view (a) and intersects with one point in the front view (b), that is, it connects the spots on the straight line 6, and the surface of the can lid through which this straight line 6 passes. The support arm 3 is attached so that the spots of the illumination light are aligned on the can lid surface.
It is necessary to determine the detection end position C.
第７図は他の実施例を示し、印刷蓋の検出用のものであ
る。近時、蓋面にも印刷された缶が増加しているが、印
刷蓋では刻印の場合のように乱反射を検出するのではな
く、色による光の反射率の変化を検出することとなる。
このため、反射光を常に或る程度受光している必要があ
り、検出ヘッド５の取付角θは小さくなり、この実施例
では１3゜とされている。そして、この場合は第２図につ
いて説明したような問題はないので、単一のヘッドで検
出が可能である。このため、ブラケット4′は一方の取
付部を有するだけである。支持腕３への取付は、第７図
の実線或いは点線のように、どちらの側から行なっても
よい。FIG. 7 shows another embodiment, which is for detecting the printing lid. Recently, the number of cans printed on the lid surface has increased, but the printing lid does not detect diffused reflection as in the case of engraving, but detects changes in light reflectance depending on color.
Therefore, it is necessary to always receive the reflected light to some extent, and the mounting angle θ of the detection head 5 becomes small, which is 13 ° in this embodiment. In this case, since there is no problem as described with reference to FIG. 2, it is possible to detect with a single head. Therefore, the bracket 4'has only one mounting portion. The attachment to the support arm 3 may be performed from either side as indicated by the solid line or the dotted line in FIG.
（発明の効果） この発明は上記の構成を有するので、 センサーは正反射光の強弱によって表裏の判別をす
るものでないため、缶蓋の傷、打痕やコンベヤのゆれに
よる影響が極めて少ない。(Effects of the Invention) Since the present invention has the above-described configuration, the sensor does not discriminate between the front and the back depending on the intensity of specular reflection light, and therefore the influence of scratches on the can lid, dents, and shakes of the conveyor is extremely small.
刻印検出の場合は検出ヘッドを複数本用いることに
より、検出精度を格段に高めることができる。In the case of marking detection, by using a plurality of detection heads, the detection accuracy can be significantly improved.
検出ヘッドはブラケットに取付けられ、ブラケット
を取付腕に固定するだけで簡単に交換出来るので、缶種
の変更への対応が容易である 等の顕著な効果を奏する。Since the detection head is attached to the bracket and can be easily replaced by simply fixing the bracket to the mounting arm, it is possible to easily respond to changes in the type of can.
第１図、第２図は従来のマーク検出法の原理説明図、第
３図、第４図、第５図はこの発明のマーク検出法の原理
説明図、第６図はこの発明のマーク検出装置の１実施例
の正面図、側面図、第７図は他の実施例の正面図 １：缶、２：検出ヘッド、３：取付腕、４：ブラケッ
ト、５：検出ヘッドFIGS. 1 and 2 are explanatory views of the principle of the conventional mark detection method, FIGS. 3, 4 and 5 are explanatory views of the principle of the mark detection method of the present invention, and FIG. 6 is the mark detection of the present invention. Front view, side view, and FIG. 7 of one embodiment of the apparatus are front views of other embodiments 1: Can, 2: Detection head, 3: Mounting arm, 4: Bracket, 5: Detection head
Claims (2)
受光・検出する光検出部を共に内蔵する同軸反射型検出
ヘッドによって缶蓋のマークを検出する缶の表裏検出装
置において、上記同軸反射型検出ヘッドの光軸を被検缶
蓋の垂線に対して傾斜させて配置することにより、散乱
反射光のみを検出することを特徴とする缶蓋のマーク検
出装置1. A can front / back surface detection device for detecting a mark on a can lid by a coaxial reflection type detection head, which incorporates both a light source for projecting light onto the surface of the can lid and a light detection section for receiving / detecting reflected light, A mark detecting device for a can lid characterized in that only the scattered reflected light is detected by arranging the optical axis of the coaxial reflection type detection head so as to be inclined with respect to the vertical line of the can lid to be tested.
受光・検出する光検出部を共に内蔵する同軸反射型検出
ヘッドによって缶蓋のマークを検出する缶の表裏検出装
置において、上記同軸反射型検出ヘッドを複数個、該ヘ
ッドと缶蓋との相対的な移動方向と交差する線上に配置
し、かつ上記に同軸反射型検出ヘッドの光軸を被検缶蓋
の垂線に対して傾斜させて配置することにより、散乱反
射光のみを検出することを特徴とする缶蓋のマーク検出
装置2. A front and back surface detection device for a can that detects a mark on the can lid by a coaxial reflection type detection head that incorporates both a light source for projecting light onto the surface of the can lid and a light detection section for receiving and detecting reflected light, A plurality of the coaxial reflection type detection heads are arranged on a line intersecting the relative movement direction of the heads and the can lid, and the optical axis of the coaxial reflection type detection head is set to the perpendicular of the test can lid. Can detect the scattered reflected light only by arranging it in a tilted manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59028698A JPH062525B2 (en) | 1984-02-20 | 1984-02-20 | Mark detection device for can lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59028698A JPH062525B2 (en) | 1984-02-20 | 1984-02-20 | Mark detection device for can lid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60178118A JPS60178118A (en) | 1985-09-12 |
| JPH062525B2 true JPH062525B2 (en) | 1994-01-12 |
Family
ID=12255688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59028698A Expired - Lifetime JPH062525B2 (en) | 1984-02-20 | 1984-02-20 | Mark detection device for can lid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH062525B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008215955A (en) * | 2007-03-01 | 2008-09-18 | Asahi Breweries Ltd | Inverted can detector |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS528606U (en) * | 1975-07-04 | 1977-01-21 | ||
| JPS5570702A (en) * | 1978-11-22 | 1980-05-28 | Yoshida Tsunehiro | Detector for screw pitch |
| JPS60100080U (en) * | 1983-12-12 | 1985-07-08 | エヌ・テ−・エヌ東洋ベアリング株式会社 | Front and back alignment device for parts |
-
1984
- 1984-02-20 JP JP59028698A patent/JPH062525B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60178118A (en) | 1985-09-12 |
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