JPH0695077B2 - Bottom inspection device for glass bottles - Google Patents
Bottom inspection device for glass bottlesInfo
- Publication number
- JPH0695077B2 JPH0695077B2 JP63039276A JP3927688A JPH0695077B2 JP H0695077 B2 JPH0695077 B2 JP H0695077B2 JP 63039276 A JP63039276 A JP 63039276A JP 3927688 A JP3927688 A JP 3927688A JP H0695077 B2 JPH0695077 B2 JP H0695077B2
- Authority
- JP
- Japan
- Prior art keywords
- glass bottle
- glass
- camera
- inspection device
- view
- 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
Links
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明はガラス壜の底面へのガラス破片の付着のほか、
ビリ、ハゼ、泡等の各種の欠陥を確実に検査することが
できるガラス壜の底面検査装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to the adhesion of glass fragments to the bottom surface of a glass bottle,
The present invention relates to a bottom surface inspection device for a glass bottle capable of surely inspecting various defects such as bills, goby and bubbles.
(従来の技術) ガラス壜の底面には成形工程中に微細なガラス破片が付
着したり、業界においてビリ、ハゼと呼ばれる割れ目や
泡、内部突起等のさまざまな欠陥が発生することがあ
り、このためにガラス壜の底面は出荷される前に全数検
査されるのが普通である。このような目的で使用される
検査装置には多くの種類があるが、本出願人の出願に係
る特公昭59-21499号公報に示されるように、テレビカメ
ラと遮光板とを利用したガラス壜の底面検査装置は暗い
視野中に欠陥部分のみが鮮やかなコントラストで浮かび
上がるため、高い検査精度を得ることができるものとし
て知られている。(Prior Art) Fine glass fragments may adhere to the bottom surface of glass bottles during the molding process, and various defects such as cracks and bubbles called buzz in the industry, internal projections, etc. may occur. For this reason, it is usual to inspect all the bottoms of glass bottles before they are shipped. There are many kinds of inspection devices used for such a purpose, but as shown in Japanese Patent Publication No. 59-21499 filed by the present applicant, a glass bottle using a television camera and a light shielding plate. It is known that the bottom surface inspection apparatus of (1) can obtain high inspection accuracy because only a defective portion emerges with a bright contrast in a dark field of view.
ところがこの底面検査装置は微細な欠陥をも確実に拾う
ことができるために、ガラス壜の底面に不可避的に生じ
るバッフルマークや、ガラス壜の底面のナーリングと呼
ばれる接地部に不可避的に生じる微細な汚れ等をも欠陥
として排除してしまい、良品を無駄に排除するムダバネ
率が高い欠点のあることが判明した。However, since this bottom surface inspection device can reliably pick up even minute defects, the baffle mark inevitably occurs on the bottom surface of the glass bottle and the microscopic inevitably generated on the grounding part called knurling on the bottom surface of the glass bottle. It was found that dirt and the like are also eliminated as defects, and the wasteful rate of wasteful non-defective products is high.
(発明が解決しようとする課題) 本発明はこのような従来の問題点を解決して、正常なガ
ラス壜の底面に不可避的に生じるバッフルマーク、型の
シームライン、ガラス壜の底面のナーリング部に不可避
的に生じる微細な汚れ等を誤って欠陥として検出するお
それがなく、しかもガラス壜の底面へのガラス破片の付
着、ビリ、ハゼ、泡等の各種の欠陥は確実に検査するこ
とができるガラス壜の底面検査装置を目的として完成さ
れたものである。(Problems to be Solved by the Invention) The present invention solves such conventional problems, and baffle marks, seam lines of molds, and knurling portions on the bottom surface of a glass bottle inevitably occur on the bottom surface of a normal glass bottle. There is no risk of inadvertently detecting fine dirt and the like as defects, and it is possible to reliably inspect various defects such as adhesion of glass fragments on the bottom surface of the glass bottle, chatter, goby, bubbles, etc. It was completed for the purpose of a bottom inspection device for glass bottles.
(課題を解決するための手段) 上記の課題を解決するためになされた本発明は、底面を
通して光線が透過できる状態で回転されるガラス壜の口
部上方にその底面の中心線付近のみを視野に納めるカメ
ラを設置するとともに、底面の下方には上記カメラの視
野に対応する底面の中心線を含む第1の領域と、底面の
バッフルマーク径に対応する位置から両側に垂直に延び
る第2の領域とをマスキングする遮光板を設置したこと
を特徴とするもである。(Means for Solving the Problem) The present invention made to solve the above-mentioned problem is to view only the vicinity of the center line of the bottom surface above the mouth of a glass bottle rotated in a state where light rays can pass through the bottom surface. The first area including the center line of the bottom surface corresponding to the field of view of the camera and the second area extending vertically from the position corresponding to the baffle mark diameter on the bottom surface to the bottom of the bottom surface. It is also characterized in that a light-shielding plate for masking the area is installed.
(実施例) 次に本発明を図示の実施例によって更に詳細に説明する
と、第1図において(1)は検査されるガラス壜(20)
を支持する孔あきのデッドプレート、(2)はガラス壜
(20)をこのデッドプレート(1)上で回転させるゴム
ローラのような適宜の壜回転機構である。(3)はガラ
ス壜(20)の底面(21)の下方に設置された照明ボック
スであって、その内部には例えば色温度5000゜Kの高周
波U字状蛍光灯のような光源(4)が取付られており、
デッドプレート(1)上で回転するガラス壜(20)の底
面(21)を下方から照明している。(Embodiment) Next, the present invention will be described in more detail with reference to the illustrated embodiment. In FIG. 1, (1) is a glass bottle (20) to be inspected.
A perforated dead plate for supporting the (2) is an appropriate bottle rotating mechanism such as a rubber roller for rotating the glass bottle (20) on the dead plate (1). (3) is an illumination box installed below the bottom surface (21) of the glass bottle (20), and inside thereof is a light source (4) such as a high frequency U-shaped fluorescent lamp with a color temperature of 5000 ° K. Is attached,
The bottom surface (21) of the glass bottle (20) rotating on the dead plate (1) is illuminated from below.
このように底面(21)を通して光線を照射された状態で
回転されるガラス壜(20)の口部上方位置には、ガラス
壜(20)の底面(21)の中心線付近のみを視野に納める
ことができるカメラ(5)が設置されている。本実施例
ではカメラ(5)として1/5000秒のシャッタースピード
で高速度撮影ができるCCDカメラが使用されているが、
カメラ(5)の種類は必ずしもこれに限定されるもので
はない。しかし生産ライン上でのオンライン検査に使用
するためにはこの程度の処理速度をもつものであること
が望ましい。カメラ(5)の視野は例えば第2図にAと
して図示されているとおりの直線的なものであり、この
視野Aの内部の明度の変化のみを高速画像処理装置
(6)により検出することができるよう構成されてい
る。In this way, above the mouth of the glass bottle (20) that is rotated while being irradiated with light rays through the bottom surface (21), only the vicinity of the center line of the bottom surface (21) of the glass bottle (20) can be seen. A camera (5) capable of being installed is installed. In this embodiment, a CCD camera capable of high-speed shooting with a shutter speed of 1/5000 seconds is used as the camera (5).
The type of camera (5) is not necessarily limited to this. However, it is desirable to have a processing speed of this level for use in online inspection on the production line. The field of view of the camera (5) is, for example, a linear one as shown as A in FIG. 2, and only the change in brightness inside the field of view A can be detected by the high-speed image processing device (6). It is configured to be able to.
一方、ガラス壜(20)の底面(21)の下方に設置された
前記した照明ボックス(3)の上面には、第2図に示さ
れるようなキの字状の遮光板(7)が設けられている。
この遮光板(7)は上記カメラ(5)の視野に対応する
ガラス壜(20)の底面(21)の中心線を含む第1の領域
(7A)と、ガラス壜(20)の底面(21)のバッフルマー
ク径に対応する位置から両側に垂直に延びる第2の領域
(7B)との遮光を行うことができる構造のものである。
なおバッフルマークとは、溶融ガラスが投入された粗型
の上面をバッフル金型により閉じ、プレス又はブロー圧
力によってパリソン成形を行う際にはパリソン底面に形
成されるバッフル金型と粗型との合せ目のあとであり、
パリソンが仕上型でガラス壜の最終形状までブロー成形
された後も第3図に(22)として示されるような円形の
マークとしてガラス壜(20)の底面(21)に残るもので
ある。また第3図に(23)として示されているのは仕上
型の合せ目のあとであるシームライン、(24)は壜底の
接地面に形成されているナーリングと呼ばれる凹凸模様
である。前記した遮光板(7)の第2の領域(7B)はカ
メラ(5)の視野Aがこのバッフルマーク(22)と交叉
する2つの位置から両側に向って垂直に延びるものとさ
れている。On the other hand, on the upper surface of the above-mentioned lighting box (3) installed below the bottom surface (21) of the glass bottle (20), a square-shaped light shielding plate (7) as shown in FIG. 2 is provided. Has been.
The shading plate (7) includes a first region (7A) including the center line of the bottom surface (21) of the glass bottle (20) corresponding to the field of view of the camera (5) and the bottom surface (21) of the glass bottle (20). The second area (7B) extending vertically from the position corresponding to the baffle mark diameter in (1) to the second area (7B) can be shielded from light.
Note that the baffle mark is the combination of the baffle mold and the rough mold that are formed on the bottom of the parison when the parison molding is performed by pressing or blowing pressure to close the upper surface of the rough mold filled with molten glass. After my eyes,
Even after the parison is blown to the final shape of the glass bottle with the finishing mold, it remains on the bottom surface (21) of the glass bottle (20) as a circular mark as shown by (22) in FIG. Also shown in FIG. 3 as (23) is a seam line after the seam of the finishing die, and (24) is an uneven pattern called knurling formed on the ground contact surface of the bottle bottom. The second area (7B) of the light shielding plate (7) extends vertically from the two positions where the field of view A of the camera (5) intersects the baffle mark (22) toward both sides.
(作用) このように構成されたものは、ガラス壜(20)の底面
(21)に欠陥が存在しない場合にはカメラ(5)の視野
Aには遮光板(7)の第1の領域(7A)が映るのみであ
り、光源(4)からの光はカメラ(5)に入ることがな
い。しかし底面(21)の外表面にガラス破片が付着して
いたり、底面(21)にビリ、ハゼ、泡、内部突起のよう
な光線を屈折、反射する欠陥があれば、遮光板(7)以
外の部分から中心線上に入射した光線がこれらの欠陥に
よって屈折、反射されて光る点としてカメラ(5)の視
野に入り、暗いバックグラウンド中に欠陥部分のみが鮮
やかなコントラストで浮上がることとなる。従って本発
明の底面検査装置によれば、従来と同様にこれらの欠陥
を精度良くかつ高速度で確実に検査することができる。
しかも本発明においては、遮光板(7)はバッフルマー
ク(22)の径に対応する位置から視野Aに対して垂直に
延びる第2の領域(7B)を備えているので、バッフルマ
ーク(22)、シームライン(23)、ナーリング(24)等
がカメラ(5)の視野Aに入る部分では第3図に矢印で
示される方向からは光線が入ることがない。従ってこれ
らの部分に生ずる不可避的な凹凸等によって光線が反射
され、カメラ(5)の視野Aに入ることが防止される。
なお、これらの部分にも斜方向からは光線が入るために
ガラス破片の付着のような明らかな欠陥の検出は確実に
行われることは勿論である。しかしバッフルマーク(2
2)やシームライン(23)、あるいはナーリング(24)
の部分における汚れ等はその特有の方向性により斜方向
からの光線によっては視野Aに向って反射することがな
く、このような法則性の発見が本発明の基礎となってい
る。(Operation) With such a structure, when there is no defect on the bottom surface (21) of the glass bottle (20), the first area ((1) of the light shielding plate (7) is provided in the visual field A of the camera (5). 7A) is only reflected, and the light from the light source (4) does not enter the camera (5). However, if there are glass fragments attached to the outer surface of the bottom surface (21), or if there are defects on the bottom surface (21) that refract or reflect light rays such as chatter, goby, bubbles, and internal projections, then the light shield (7) The light rays incident on the center line from the area (1) enter the visual field of the camera (5) as a point where they are refracted and reflected by these defects and shine, and only the defective area floats up in the dark background with vivid contrast. Therefore, according to the bottom surface inspection apparatus of the present invention, these defects can be inspected with high accuracy and at high speed as in the conventional case.
Moreover, in the present invention, since the light shielding plate (7) has the second region (7B) extending perpendicularly to the visual field A from the position corresponding to the diameter of the baffle mark (22), the baffle mark (22). , The seam line (23), the knurling (24) and the like are in the field of view A of the camera (5), no light rays enter from the direction indicated by the arrow in FIG. Therefore, the light rays are prevented from entering the visual field A of the camera (5) due to the unavoidable irregularities and the like generated in these portions.
In addition, since light rays also enter these portions from an oblique direction, it is needless to say that a clear defect such as adhesion of glass fragments is surely detected. However, the baffle mark (2
2) or seam lines (23) or knurling (24)
Due to the peculiar directionality of the dirt and the like in the part (2), the light rays from the oblique direction do not reflect toward the visual field A, and the discovery of such a law is the basis of the present invention.
以上のように、本発明によればバッフルマーク(22)、
シームライン(23)やナーリング(24)の部分に生ずる
汚れ等を誤って検出することがないので、良品を無駄に
排除するムダバネ率を低下させることができる。As described above, according to the present invention, the baffle mark (22),
Since the dirt and the like generated on the seam line (23) and the knurling (24) are not erroneously detected, it is possible to reduce the waste spring rate for wastefully excluding non-defective products.
本発明のガラス壜の底面検査装置をラインテストしたと
ころ、次のとおりの結果が得られた。まず129本の良品
中に12本の不良品(0.5×0.5mm程度のガラス片付着壜)
を混入した総数141本のサンプル壜の検査を10回繰返し
行わせた。その結果、10回とも12本の不良壜は全て検出
され、しかも良品を誤って排除した本数は0本でムダバ
ネ率は0%であった。次に総数39975本の別のガラス壜
についてオンラインテストを行ったところ、10本の不良
壜が排除されたがこの装置を通過後に1本の不良壜が検
出されたので検出率は10/11=91%であった。また160本
の良品が誤って排除されたのでムダバネ率は0.4%とな
るが、従来の検査装置によるときはムダバネ率は1〜2
%に及ぶのが普通であり、本発明の効果が実証された。A line test was performed on the bottom surface inspection device for a glass bottle of the present invention, and the following results were obtained. First of all, 12 out of 129 non-defective products (glass bottles with 0.5 x 0.5 mm diameter)
The inspection of a total of 141 sample bottles mixed with was repeated 10 times. As a result, 12 defective bottles were detected in all 10 times, and the number of non-defective products that were mistakenly rejected was 0, and the waste spring rate was 0%. Next, an online test was performed on a total of 39975 glass bottles, and 10 defective bottles were eliminated, but one defective bottle was detected after passing this device, so the detection rate was 10/11 = It was 91%. Also, since 160 good products were mistakenly removed, the waste spring rate is 0.4%, but when using the conventional inspection device, the waste spring rate is 1-2.
%, And the effect of the present invention was demonstrated.
なお第2図に示す例では底面全体を検査するためにガラ
ス壜(20)を少くとも180゜回転させる必要があるが、
第4図に示すようにカメラ(5)の視野Aと遮光板
(7)の第1と第2の領域(7A)、(7B)をクロス状に
配置しておけば、ガラス壜(20)を90゜回転させるだけ
で良いこととなり、検査スピードを更に向上させること
ができる。In the example shown in FIG. 2, the glass bottle (20) needs to be rotated at least 180 ° in order to inspect the entire bottom surface.
As shown in FIG. 4, if the field of view A of the camera (5) and the first and second areas (7A) and (7B) of the light shielding plate (7) are arranged in a cross shape, the glass bottle (20) It only needs to be rotated by 90 °, and the inspection speed can be further improved.
(発明の効果) 本発明は以上の説明からも明らかなように、正常なガラ
ス壜の底面に不可避的に生ずるバッフルマーク等の凹凸
を誤って排除するムダバネ率を従来よりも大幅に減少し
つつ、ガラス壜の底面のガラス破片の付着等の欠陥は確
実に検出することができるものであるから、従来の問題
点を一掃したガラス壜の底面検査装置として、産業の発
展に寄与するところは極めて大である。(Effects of the Invention) As is apparent from the above description, the present invention significantly reduces the waste spring rate that erroneously eliminates irregularities such as baffle marks that are inevitably produced on the bottom surface of a normal glass bottle, while significantly reducing it. Since it is possible to reliably detect defects such as adhesion of glass fragments on the bottom surface of the glass bottle, as a bottom inspection device for glass bottles that eliminates the conventional problems, it is extremely important to contribute to the development of the industry. Is large.
第1図は本発明の実施例を示す一部切欠側面図、第2図
はその要部の平面図、第3図はガラス壜の底面と遮光板
との関係を示す平面図、第4図は他の実施例の要部を示
す平面図である。 (5):カメラ、(7):遮光板、(7A):第1の領
域、(7B):第2の領域、(20):ガラス壜、(21):
底面。FIG. 1 is a partially cutaway side view showing an embodiment of the present invention, FIG. 2 is a plan view of an essential part thereof, FIG. 3 is a plan view showing a relationship between a bottom surface of a glass bottle and a light shielding plate, and FIG. [FIG. 11] is a plan view showing the main parts of another embodiment. (5): Camera, (7): Light-shielding plate, (7A): First area, (7B): Second area, (20): Glass bottle, (21):
Bottom.
Claims (1)
で回転されるガラス壜(20)の口部上方にその底面(2
1)の中心線付近のみを視野に納めるカメラ(5)を設
置するとともに、底面(21)の下方には上記カメラ
(5)の視野Aに対応する底面(21)の中心線を含む第
1の領域(7A)と、底面(21)のバッフルマーク径に対
応する位置から両側に垂直に延びる第2の領域(7B)と
をマスキングする遮光板(7)を設置したことを特徴と
するガラス壜の底面検査装置。1. A glass bottle (20) which is rotated so that light rays can pass through the bottom surface (21), has a bottom surface (2) above the mouth of the glass bottle (20).
A camera (5) is installed so that the field of view is only near the center line of 1), and below the bottom face (21), the center line of the bottom face (21) corresponding to the view A of the camera (5) is included. Glass (7) for masking the area (7A) and the second area (7B) extending vertically on both sides from the position corresponding to the baffle mark diameter of the bottom surface (21). Bottom inspection device for bottles.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63039276A JPH0695077B2 (en) | 1988-02-22 | 1988-02-22 | Bottom inspection device for glass bottles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63039276A JPH0695077B2 (en) | 1988-02-22 | 1988-02-22 | Bottom inspection device for glass bottles |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01213558A JPH01213558A (en) | 1989-08-28 |
JPH0695077B2 true JPH0695077B2 (en) | 1994-11-24 |
Family
ID=12548642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63039276A Expired - Fee Related JPH0695077B2 (en) | 1988-02-22 | 1988-02-22 | Bottom inspection device for glass bottles |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0695077B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5095204A (en) * | 1990-08-30 | 1992-03-10 | Ball Corporation | Machine vision inspection system and method for transparent containers |
US5466927A (en) * | 1994-04-08 | 1995-11-14 | Owens-Brockway Glass Container Inc. | Inspection of translucent containers |
DE29518639U1 (en) * | 1995-11-24 | 1997-03-27 | Heuft Systemtechnik Gmbh | Device for transporting containers past a device for inspecting the bottom of the containers |
DE29706425U1 (en) * | 1997-04-10 | 1998-08-06 | Heuft Systemtechnik Gmbh, 56659 Burgbrohl | Device for the detection of diffusely scattering contaminants in transparent containers |
US7010863B1 (en) | 2004-01-26 | 2006-03-14 | Owens-Brockway Glass Container Inc. | Optical inspection apparatus and method for inspecting container lean |
JP6518911B2 (en) * | 2015-05-19 | 2019-05-29 | キリンテクノシステム株式会社 | Container inspection apparatus and inspection method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5325509B2 (en) * | 1973-06-27 | 1978-07-27 | ||
JPS56166453A (en) * | 1980-05-27 | 1981-12-21 | Mitsubishi Electric Corp | Inspecting apparatus for bottle |
-
1988
- 1988-02-22 JP JP63039276A patent/JPH0695077B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH01213558A (en) | 1989-08-28 |
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