JPH05112357A - Easily-openable can lid - Google Patents
Easily-openable can lidInfo
- Publication number
- JPH05112357A JPH05112357A JP33381991A JP33381991A JPH05112357A JP H05112357 A JPH05112357 A JP H05112357A JP 33381991 A JP33381991 A JP 33381991A JP 33381991 A JP33381991 A JP 33381991A JP H05112357 A JPH05112357 A JP H05112357A
- Authority
- JP
- Japan
- Prior art keywords
- top plate
- buckling
- lid
- opening
- center
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 81
- 239000011324 bead Substances 0.000 claims description 65
- 238000004049 embossing Methods 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 230000035622 drinking Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 235000013361 beverage Nutrition 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003405 preventing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/06—Integral, or permanently secured, end or side closures
- B65D17/08—Closures secured by folding or rolling and pressing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers Opened By Tearing Frangible Portions (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は保存安定性を改良したブ
ッシュオープンタイプの容易開口罐蓋に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bush open type easy opening can lid having improved storage stability.
【０００２】[0002]
【従来の技術】容易開口容器の罐蓋には一般にプルオー
プンタイプと称されるタブを有する形式のものが極めて
多く用いられている。しかし、プルオープンタイプのも
のは開口部分を形成する開口片が一般に罐蓋天板から除
去されるものが多く、開口片が散逸し、該開口片の端部
は比較的鋭利である故、手足等に損傷を与えたり、分離
した開口片を鳥や魚が飲み込んで死ぬ事故が多く問題と
なっている。そのため、開口片を罐蓋天板から完全に分
離し得ない様に開口片が天板に対し連接部分を有する形
式の罐蓋も提案されている。2. Description of the Related Art As a can lid for an easy opening container, a type having a tab generally called a pull open type is very often used. However, in the pull-open type, the opening piece forming the opening is generally removed from the can lid top plate, and the opening piece scatters, and the ends of the opening piece are relatively sharp, so There are many problems that birds and fish swallow the separated opening pieces and die when they are damaged. Therefore, a can lid of a type in which the opening piece has a connecting portion to the top plate so that the opening piece cannot be completely separated from the top plate of the can lid is proposed.
【０００３】プルオープンタイプの開口片と蓋体の連接
部分を有する形式の罐は、液体飲料用容器の様に容器か
ら直接に内容物を飲む場合、鼻先に開口片が位置し、開
口片の破断端部が比較的鋭利である故、該鼻先の開口片
により違和感を免れず、需要者に好まれない欠点がある
が、この点を改良した開口片を天板から完全分離をさせ
ない容易開口容器の罐蓋としてはプッシュオープンタイ
プと称し開口片を容器内に押し込む形式のものがある。A can of a type having a connecting portion of a pull-open type opening piece and a lid body, when the contents are directly drinkable from a container such as a liquid beverage container, the opening piece is located at the tip of the nose, and Since the broken end is relatively sharp, the opening piece at the tip of the nose inevitably causes discomfort and is not preferred by consumers. However, the opening piece improved on this point is an easy opening that is not completely separated from the top plate. As a can lid for a container, there is a type called a push-open type in which an opening piece is pushed into the container.
【０００４】これ等のプッシュオープンタイプの罐蓋は
前記の分離した開口片による欠点は解消されるが、実用
に供したとき新しい問題が発生した。液体飲料の多くは
炭酸ガス等のガスを含有するものが多い。これ等のガス
含有飲料を内蔵した飲料容器は保存中に内圧が上昇する
と、内部から押し上げられ、バックリングと称する現象
が多発し、蓋が外方に押し上げられて部分的に突出す
る。このため開口スコアが破断して開罐して飲料が吹出
してしまうのである。この現象はプッシュオープンタイ
プの罐蓋に多発する。この問題を解決した発明が整理番
号ＰＴ００００３−６４号の発明である。この発明はス
コアに囲まれた開口片の先端部付近を除いて天板の周縁
溝近傍をコイニングして薄肉強化部を配置し、開口片の
先端部付近以外の天板周縁にエンボス凹所又はコイニン
グ溝等の耐圧弱化部を設けた罐蓋である。この発明は厚
肉罐蓋においては非常に有効であって問題は解決され
た。しかしながら肉厚が０．２８５ｍｍ以下の薄肉罐蓋
においてはバックリングが複数回発生すると、蓋は円弧
状に大きく盛上ってしまう。そして特に薄肉罐蓋で問題
となるのは２回目のバックリングが初回のバックリング
の位置と罐中心に対して反対側に発生する。したがって
上記の蓋では２回目のバックリングは開口片先端に発生
してしまう。Although these push-open type can lids solve the above-mentioned drawbacks due to the separate opening pieces, when they are put into practical use, new problems occur. Many liquid beverages contain gas such as carbon dioxide. When the internal pressure of a beverage container containing these gas-containing beverages rises during storage, it is pushed up from the inside, and a phenomenon called buckling frequently occurs, and the lid is pushed outward and partially protrudes. As a result, the opening score is broken and the opening is opened and the beverage is blown out. This phenomenon often occurs in push-open type can lids. The invention that solves this problem is the invention of reference number PT00003-64. This invention coins the vicinity of the peripheral groove of the top plate except for the vicinity of the tip of the opening piece surrounded by the score, and arranges the thin-walled strengthening portion, and embossed recesses or It is a can lid provided with a pressure weakening portion such as a coining groove. The present invention is very effective in a thick-walled can lid and the problem has been solved. However, in the case of a thin can lid having a wall thickness of 0.285 mm or less, if the buckling occurs a plurality of times, the lid will largely rise in an arc shape. The problem with thin-walled cans is that the second buckling occurs on the opposite side to the position of the first buckling and the center of the can. Therefore, in the above lid, the second buckling occurs at the tip of the opening piece.
【０００５】[0005]
【発明が解決しようとする課題】本発明の課題は従来不
可能であった初回、および２回目以後のバックリングの
位置を制御して、順次予め定めた順序でバックリングさ
せ開口片先端のバックリングを防止しスコアの破断を防
ぐことである。本発明は特別の手段によりこの課題の解
決に成功した。The problem to be solved by the present invention is to control the positions of the bucklings for the first time and the second time and thereafter, which have not been possible in the past, so that the bucklings are performed sequentially in a predetermined order, and the backing of the tip of the opening piece is performed. It is to prevent the ring and the score from breaking. The present invention has succeeded in solving this problem by special means.
【０００６】[0006]
【課題を解決した手段】本発明は、 「１． 天板と天板周縁部に設けた周縁溝とを有する罐
蓋であって、天板のほぼ中央部にリベットにより連結し
たタブと、始点と終点をリベット前方でかつヒンジとな
る間隔を設けて配置したスコアと、スコアに囲まれた開
口片と、からなる容易開口罐蓋であって、該罐蓋を開口
片先端と天板の中心を結ぶ線とこの線に対して天板の中
心を通って直交する直線で扇状の４部分に区分けしたと
き開口片と反対側にある２つの扇状の部分の何れか１方
又は両方の周縁溝外壁の天板と同じ高さの位置から天板
の中心に向かって１２ｍｍの環状部分であって前記の開
口片先端と天板の中心を結ぶ線より天板の中心から２５
度〜６５度の範囲に座屈部を配設した容易開口罐蓋。 ２． 開口片側にある２つの扇状の部分の何れか１方又
は両方の周縁溝外壁の天板と同じ高さの位置から天板の
中心に向かって１２ｍｍの環状部分であって前記の開口
片先端と天板の中心を結ぶ線より天板の中心から２５度
〜６５度の範囲に開口片と反対側にある２つの扇状の部
分に設けた座屈部より座屈性の小さい座屈部を配設した
１項に記載された容易開口罐蓋。 ３． 座屈部がコイニングまたはスコアリングにより天
板に形成された溝である１項または２に記載された容易
開口罐蓋。 ４． 座屈部がエンボシングにより天板に形成された凹
所である１項または２に記載された容易開口罐蓋。 ５． 座屈部が天板を押し上げて天板に形成したディン
プルである１項または２に記載された容易開口罐蓋。 ６． 座屈部が周縁溝内壁を天板の中心側に向けて傾斜
を部分的に変形させた変型内壁部である、１項または２
に記載された容易開口罐蓋。 ７． 座屈部が周縁溝内壁を天板の中心と反対側に向け
て部分的に変形させた変形内壁部である、１項または２
に記載された容易開口罐蓋。 ８． 座屈部が周縁溝外壁を天板の中心側に向けて部分
的に変形させた変型外壁部である、１項または２に記載
された容易開口罐蓋。 ９． 座屈部が周縁溝外壁を天板の中心と反対側に向け
て部分的に変形させた変型外壁部である、１項または２
に記載された容易開口罐蓋。 １０． 座屈部が周縁溝の底部を部分的に薄肉とした薄
肉部である、１項または２に記載された容易開口罐蓋。 １１． 座屈部が周縁溝のチャックウオールラジアスを
部分的に薄肉とした薄肉部である、１項または２に記載
された容易開口罐蓋。 １２． 座屈部がビーディングにより天板に形成したビ
ードの先端である１項または２に記載された容易開口罐
蓋。 １３． 座屈部が直線状または弧状のビードの先端であ
る、１２項に記載された容易開口罐蓋。 １４． 座屈部が天板の周縁溝近傍に沿って設けられて
いるビードの先端である、１２項または１３に記載され
た容易開口罐蓋。 １５． 座屈部が開口片と反対側にある２つの扇状の部
分に跨がっているビードの先端である、１２項ないし１
４のいずれか１項に記載された容易開口罐蓋。 １６． 座屈部が開口片と反対側にある２つの扇状部分
の夫々と開口片側にある２つの扇状部分の夫々に跨がっ
て配設されているビードの先端であり、開口片側の扇状
部分のビードの先端深さが反対側より浅いビードであ
る、１２項または１３に記載された容易開口罐蓋。 １７． 座屈部が、一端が周縁溝外壁の天板とほぼ同じ
高さの位置から天板の中心に向かって１２ｍｍの巾の周
縁溝に沿った同心円環状部分の開口片先端と天板の中心
を結ぶ線より天板の中心から２５度〜６５度の範囲内に
あり、他端がこの範囲より天板の中心側にある直線状ま
たは弧状の２本のビードの周縁溝側の先端であって開口
片と反対側にある２つの扇状の部分に夫々配置されてい
る、１２項または１３に記載された容易開口罐蓋。 １８． 座屈部が、一端が周縁溝外壁の天板とほぼ同じ
高さの位置から天板の中心に向かって１２ｍｍの巾の周
縁溝に沿った同心円環状部分の開口片先端と天板の中心
を結ぶ線より天板の中心から２５度〜６５度の範囲内に
あり、他端がこの範囲より天板の中心側にある直線状ま
たは弧状の４本のビードの周縁溝側の先端であって全て
の扇状の部分に配置されている、１２項または１３に記
載された容易開口罐蓋。 １９． 座屈部が弧状のビードの先端であって、該弧状
のビードの先端が開口片と反対側にある２つの扇状の部
分の夫々と開口片側にある２つの扇状の部分の夫々にに
跨がって配設されており該弧状のビードが蓋の中心側に
凸に形成された、１２項または１３に記載された容易開
口罐蓋。 ２０． 天板と周縁溝の連結部にコイニングによる薄肉
強化部を配設した、１項ないし１９のいずれか１項に記
載された容易開口罐蓋。」に関するMeans for Solving the Problems The present invention relates to a "1. a can lid having a top plate and a peripheral groove provided in a peripheral portion of the top plate, wherein a tab connected to a substantially central portion of the top plate by a rivet and a starting point. An easy-opening can lid consisting of a score whose end points are located in front of the rivet and at a distance to serve as a hinge, and an opening piece surrounded by the scores, the can lid being the tip of the opening piece and the center of the top plate. And a line connecting the lines and a straight line passing through the center of the top plate at right angles to this line and divided into four fan-shaped portions, one or both of the two fan-shaped portions on the side opposite to the opening piece 25 mm from the center of the top plate from the line connecting the tip of the opening piece and the center of the top plate, which is an annular portion of 12 mm from the same height as the top plate of the outer wall toward the center of the top plate.
An easy-opening can lid with a buckling part in the range of 65 degrees to 65 degrees. 2. One of the two fan-shaped portions on the side of the opening, or both of the peripheral groove outer walls are 12 mm toward the center of the top from a position at the same height as the top, which is an annular portion of the opening. A buckling part that is less buckling than the buckling part provided on the two fan-shaped parts on the opposite side of the opening piece is arranged in the range of 25 degrees to 65 degrees from the center of the top plate with respect to the line connecting the centers of the top plate. The easy opening can lid described in the above item 1. 3. The easy opening can lid described in 1 or 2, wherein the buckling portion is a groove formed on the top plate by coining or scoring. 4. The easy opening can lid described in 1 or 2, wherein the buckling portion is a recess formed in the top plate by embossing. 5. The easy opening can lid described in 1 or 2, wherein the buckling portion is a dimple formed by pushing up the top plate to form the top plate. 6. Item 1 or 2 wherein the buckling portion is a modified inner wall portion obtained by partially deforming the inclination of the inner wall of the peripheral groove toward the center side of the top plate.
Easy opening can lid described in. 7. The buckling portion is a deformed inner wall portion obtained by partially deforming the peripheral groove inner wall toward the side opposite to the center of the top plate, 1 or 2
Easy opening can lid described in. 8. The easy opening can lid described in 1 or 2, wherein the buckling portion is a modified outer wall portion obtained by partially deforming the peripheral groove outer wall toward the center side of the top plate. 9. Item 1 or 2 wherein the buckling portion is a modified outer wall portion obtained by partially deforming the outer wall of the peripheral groove toward the side opposite to the center of the top plate.
Easy opening can lid described in. 10. The easy opening can lid described in 1 or 2, wherein the buckling portion is a thin portion in which the bottom portion of the peripheral groove is partially thin. 11. The easy-opening can lid described in 1 or 2, wherein the buckling portion is a thin portion in which the chuck wall radius of the peripheral groove is partially thin. 12. The easy opening can lid described in 1 or 2, wherein the buckling portion is a tip of a bead formed on the top plate by beading. 13. The easy-opening can lid described in Item 12, wherein the buckling portion is a tip of a straight or arc-shaped bead. 14. The easy-opening can lid described in Item 12 or 13, wherein the buckling portion is the tip of a bead provided along the vicinity of the peripheral groove of the top plate. 15. Item 12 to 1, wherein the buckling portion is the tip of a bead that straddles two fan-shaped portions on the opposite side of the opening piece.
The easy opening can lid described in any one of 4 above. 16. The buckling portion is the tip of the bead that is disposed across each of the two fan-shaped portions on the side opposite to the opening piece and each of the two fan-shaped portions on the opening piece side. The easy-opening can lid described in 12 or 13, wherein the bead is a bead having a tip depth that is shallower than the opposite side. 17. The buckling part is such that the end of the opening piece of the concentric annular portion and the center of the top plate along the peripheral groove with a width of 12 mm from the position where one end is almost at the same height as the top plate of the outer wall of the peripheral groove toward the center of the top plate. It is within the range of 25 to 65 degrees from the center of the top plate with respect to the connecting line, and the other end is the tip on the peripheral groove side of two linear or arc-shaped beads located on the center side of the top plate from this range. The easy-opening can lid described in 12 or 13, which is arranged in two fan-shaped portions on the side opposite to the opening piece, respectively. 18. The buckling part has the end of the opening piece of the concentric annular portion along the peripheral groove with a width of 12 mm from the position where one end is almost the same height as the top plate of the outer wall of the peripheral groove toward the center of the top plate and the center of the top plate. It is within the range of 25 to 65 degrees from the center of the top plate with respect to the connecting line, and the other end is the tip on the peripheral groove side of four straight or arc-shaped beads located on the center side of the top plate from this range. The easy-opening can lid described in the item 12 or 13, which is arranged in all the fan-shaped portions. 19. The buckling portion is the tip of the arc-shaped bead, and the tip of the arc-shaped bead extends over each of the two fan-shaped portions on the side opposite to the opening piece and each of the two fan-shaped portions on the opening piece side. The easy-opening can lid described in the above item 12 or 13, wherein the arc-shaped beads are formed so as to be convex toward the center of the lid. 20. 20. The easy opening can lid described in any one of items 1 to 19, wherein a thin-walled reinforcing portion by coining is arranged at a connecting portion between the top plate and the peripheral groove. Regarding
【０００７】[0007]
【作用】さきに述べたように、開口片の分離しないプッ
シュオープン型の罐蓋は分離した開口片による問題を発
生しない点から望ましいが、罐の保存中に罐内温上昇に
よりバックリングによるスコア破断を生じる欠点があ
る。本発明者はこの原因について研究を行なった結果、
プルオープン型罐蓋とプッシュオープン型罐蓋の開口ス
コアの深さの相違によりプッシュオープン型罐蓋にのみ
スコア破断が発生することが解明された。そして薄肉罐
においてバックリングによる罐蓋の持上げ量が著しく大
きいことも判明した。[Function] As described above, the push-open type can lid with the opening piece not separated is preferable in that it does not cause a problem due to the separated opening piece, but the score due to buckling due to the temperature rise in the can during storage of the can. It has the drawback of breaking. As a result of the present inventor's research on this cause,
It was clarified that score rupture occurs only in the push-open type can lid due to the difference in depth of the opening score between the pull-open type can lid and the push-open type can lid. It was also found that the amount of lifting of the can lid by the buckling in the thin can was extremely large.
【０００８】従来のプルオープン型の罐蓋の場合は開口
片を切断する天板周辺付近のスコアが浅く、残肉厚が大
きくてもプルタブで引きちぎるので開口出来るが、プッ
シュオープン型の罐蓋はタブの先端で開口片を罐の内部
に押し込んでスコアを切断するのでスコアの残肉厚を少
くする必要がある。特に開口片先端の天板周辺部付近い
わゆる飲み口部はタブからの距離も遠く力が掛り難いの
でスコア残厚を小さくしなければならない。このように
開口片の天板周縁部付近はスコア残厚が小さいので、こ
の部分にバックリングが発生するとスコアが破断するの
である。In the case of the conventional pull-open type can lid, the score around the top plate for cutting the opening piece is shallow, and even if the remaining thickness is large, it can be opened by pulling it off with the pull tab, but the push-open type can lid is Since the score is cut by pushing the opening piece into the can with the tip of the tab, it is necessary to reduce the residual thickness of the score. In particular, the so-called mouth near the top plate around the tip of the opening piece is far from the tab and is hard to apply force, so the score remaining thickness must be reduced. Since the score residual thickness is small in the vicinity of the peripheral portion of the top plate of the opening piece, the score is broken when buckling occurs in this portion.
【０００９】バックリングは自動車内等の温度の高い所
に置かれると内温が上昇するので罐の内圧が高くなり、
蓋を押し上げるために発生する。罐蓋は胴部に捲締める
必要上、天板周縁に溝部が設けられこの周縁溝の外側に
捲締部が設けられている。溝部をプレス形成するためこ
こに残留応力が発生するため罐内圧が高くなるとこの溝
部が外に膨出して凸部を形成する。これがバックリング
と呼ばれる現象である。When the buckling is placed in a place where the temperature is high, such as in an automobile, the internal temperature rises, so the internal pressure of the can increases.
It occurs to push up the lid. Since the can lid is required to be fastened to the body portion, a groove portion is provided on the peripheral edge of the top plate, and a clamp portion is provided outside the peripheral groove. Since the groove portion is press-formed, a residual stress is generated there, so that when the cantilever internal pressure becomes high, the groove portion bulges outward to form a convex portion. This is a phenomenon called buckling.
【００１０】ガス含有飲料はガスの含有量が液体の４〜
６倍であるので、一度バックリングした後でも保存条件
により膨出部もガスで満たされ、内圧が高くなれば２度
３度とバックリングを発生する。The gas-containing beverage has a gas content of 4 to 4
Since it is 6 times, even after the buckling once, the bulging portion is filled with the gas depending on the storage condition, and the buckling occurs 2 times and 3 degrees when the internal pressure becomes high.
【００１１】本発明者は、プッシュオープンタイプの罐
蓋ではバックリングを完全に防止することが困難である
ことを考え、バックリングを開口スコア特に天板周縁に
近い開口片先端のスコア付近以外の所で発生させること
を研究した。このような位置であればバックリングして
もスコア破断の危険がないからである。The inventor of the present invention considers that it is difficult to completely prevent buckling with a push-open type can lid, so that the buckling is performed at a score other than near the opening score, especially the score at the tip of the opening near the periphery of the top plate. Researched to generate in place. This is because at such a position, there is no risk of score breakage even when buckling.
【００１２】そのためには蓋のこのような位置に耐圧性
の小さいバックリングを発生し易い座屈部を形成するこ
とを考えた。For that purpose, it was considered to form a buckling portion where buckling having low pressure resistance is likely to occur at such a position of the lid.
【００１３】バックリングは、２回、３回と繰り返し発
生する危険があるが、初回が最も変形量が大きいので、
初回のバックリングを開口片先端部以外の箇所で発生さ
せればスコア破断の危険は少くなる。前述のように薄肉
罐では２回目のバックリングは初回のバックリングの位
置とは罐蓋中心に対して反対側の位置に発生するが２回
目のバックリングも開口片先端の反対側で発生させなけ
ればならない。The buckling has a risk of being repeatedly generated twice or three times, but since the deformation amount is the largest at the first time,
If the first buckling occurs at a position other than the tip of the opening piece, the risk of score breakage is reduced. As mentioned above, in the thin-walled can, the second buckling occurs on the opposite side to the center of the can lid with respect to the position of the first buckling, but the second buckling also occurs on the opposite side of the opening piece tip. There must be.
【００１４】このバックリングの順序について詳細に説
明すると、蓋を中心と開口片先端を通る直線（以下Ｙ軸
という）と中心でＹ軸に直交する直線（以下Ｘ軸とい
う）で四等分し開口片先端側を６時の方向、反対側を１
２時の方向というように時計にみたてて考えた場合、１
２時と３時の間を第１象限とし、９時と１２時の間を第
２象限、６時と９時の間を第３象限、３時と６時の間を
第４象限とすると、初回のバックリングを第１象限か第
２象限で発生させ、２回目を残った第１象限か第２象限
で発生させるのである。The order of this buckling will be described in detail. A straight line passing through the lid and the tip of the opening piece (hereinafter referred to as the Y axis) and a line orthogonal to the Y axis at the center (hereinafter referred to as the X axis) are divided into four equal parts. Opening piece tip side is at 6 o'clock, opposite side is 1
If you think of it like a clock at 2 o'clock, 1
If the first quadrant is between 2:00 and 3:00, the second quadrant is between 9:00 and 12:00, the third quadrant is between 6:00 and 9:00, and the fourth quadrant is between 3:00 and 6:00. It is generated in the quadrant or the second quadrant, and the second time is generated in the remaining first quadrant or the second quadrant.
【００１５】２回のバックリングにより蓋は大きく変形
し、外に盛り上がるので３回目以降のバックリングによ
る変形量は小さくなる。したがって３回目、４回目のバ
ックリングを第３象限か第４象限で発生させてもスコア
線の破断は発生しない。そして基本的バックリングは４
回以上は発生しない。The lid is largely deformed by the buckling performed twice and rises to the outside, so that the amount of deformation caused by the buckling after the third time becomes small. Therefore, even if the third and fourth bucklings occur in the third quadrant or the fourth quadrant, the score line does not break. And the basic buckling is 4
Does not occur more than once.
【００１６】このような順序でバックリングを発生させ
るのが本発明の特徴の１つである。そのためには蓋の第
１象限と第２象限に第３象限と第４象限より座屈性の大
きい座屈部を設ければ良いのであるが実際に座屈部を配
置してみたところ、座屈部の配設位置に重大な問題があ
ることがわかった。It is one of the features of the present invention that buckling occurs in such an order. For that purpose, it is necessary to provide buckling portions in the first and second quadrants of the lid, which have greater buckling properties than in the third and fourth quadrants. However, when the buckling portions were actually arranged, It was found that there is a serious problem in the position of the flexion.
【００１７】すなわち、第１象限および第２象限のＹ軸
から２５度〜６５度の扇形部分であって、しかも、周縁
溝外壁の天板とほぼ同じ高さの位置から天板の中心に向
かって１２ｍｍの帯状の同心円環部分の範囲内になけれ
ばならないことがわかった。この範囲に座屈部を配設し
ないと２回目のバックリングが第３ないし第４象限に発
生する場合があり、スコア破断の危険があった。That is, it is a fan-shaped portion of the first and second quadrants at 25 ° to 65 ° from the Y-axis, and is directed toward the center of the top plate from a position substantially the same as the top plate of the outer wall of the peripheral groove. It was found that it must be within the range of a 12 mm band-shaped concentric ring portion. If the buckling portion is not arranged in this range, the second buckling may occur in the third and fourth quadrants, and there is a risk of score breakage.
【００１８】また第３、第４象限にも座屈部を配設する
と、３回目、４回目のバックリングの位置が制御される
のでスコア破断防止効果が大きくなる事がわかった。第
３象限と第４象限に設ける座屈部は座屈性が第１象限と
第２象限に設けた座屈部より小さいことが必要である。
そうでないと初回と２回目のバックリングが、第３象限
と第４象限に発生するからである。Further, it has been found that when the buckling portions are provided also in the third and fourth quadrants, the position of the buckling at the third time and the fourth time is controlled, so that the score rupture preventing effect is increased. The buckling portions provided in the third quadrant and the fourth quadrant need to have a buckling property smaller than that provided in the first quadrant and the second quadrant.
Otherwise, the first and second bucklings occur in the third quadrant and the fourth quadrant.
【００１９】第３象限と第４象限に設ける座屈部の位置
は、夫々Ｙ軸から２５〜６５度の扇形部分であって、し
かも、周縁溝外壁の天板とほぼ同じ高さの位置から天板
の中心に向かって１２ｍｍの帯状の同心円環部分の範囲
内になければならない。この範囲外にあると３回目、４
回目のバックリングにより開口片のスコアが破断する。
座屈部としては、上記の位置の天板に、コイニングまた
はスコアリングにより設けた溝部が良い効果を奏する。
この溝部は座屈性が大きくこの部分でバックリングが発
生する。The positions of the buckling portions provided in the third and fourth quadrants are fan-shaped portions of 25 to 65 degrees from the Y-axis, respectively, and at the same height as the ceiling plate of the outer wall of the peripheral groove. It must be within a 12 mm band of concentric annulus portions towards the center of the top. If it is out of this range, the third time, 4
The score of the opening piece is broken by the second buckling.
As the buckling portion, a groove portion provided by coining or scoring on the top plate at the above position has a good effect.
This groove has a large buckling property, and buckling occurs at this portion.
【００２０】また、上記の溝に代えてエンボッシングに
よる凹所を配置してもよい。バックリングはエンボッシ
ングによる変形の凹所周辺を起点として発生する。エン
ボッシング凹所の場合は、バックリングは凹の変形の大
きい箇所例えば半月形凹所の両端の尖端部に発生するの
で、尖端部が前記の蓋の位置にあればここからバックリ
ングする。この他天板に形成した凸所であるデインプル
も座屈性が大きく効果がある。バックリングはデインプ
ルの頂上ではなく周縁で発生する。Further, instead of the groove, a recess formed by embossing may be arranged. The buckling starts around the recess of the deformation caused by embossing. In the case of the embossing recess, the buckling occurs at a portion where the recess is largely deformed, for example, at the apexes of both ends of the meniscus recess. Therefore, if the apex is at the position of the lid, buckling is performed from here. In addition, the dimples, which are convex portions formed on the top plate, also have a large buckling property and are effective. Buckling occurs at the periphery of the dimples rather than at the top.
【００２１】天板に形成したビードも有効な座屈部を形
成する。ビードの場合はビードの先端が座屈部となりこ
こでバックリングが発生する。したがってビードの先端
の位置が蓋の前記の範囲にある必要があるがこの要件を
満たせばビードの形状は制限されない。直線状でも弧状
でもよい。また、ビードの先端が周縁溝付近の所定の位
置にあればビードは直線状でも蓋の中心に向けて凸状で
もよい。The beads formed on the top plate also form effective buckling portions. In the case of a bead, the tip of the bead becomes a buckling portion and buckling occurs here. Therefore, it is necessary that the position of the bead tip is within the above-mentioned range of the lid, but the shape of the bead is not limited as long as this requirement is satisfied. It may be linear or arcuate. Further, if the tip of the bead is located at a predetermined position near the peripheral groove, the bead may be linear or convex toward the center of the lid.
【００２２】座屈部がコイニングまたはスコアリングに
よる溝の場合、第３、第４象限の溝は第１、第２象限の
溝より浅くなくてはならない。またエンボッシングによ
る凹所とビードの場合は第１象限と第２象限にまたがっ
て形成することも出来る。When the buckling portion is a groove formed by coining or scoring, the grooves in the third and fourth quadrants must be shallower than the grooves in the first and second quadrants. In the case of a recess and a bead formed by embossing, the recess and the bead can be formed in the first quadrant and the second quadrant.
【００２３】ビードの場合は、第１象限と第４象限にま
たがったビードと、第２象限と第３象限にまたがったビ
ードを配設してもよい。この場合は第３と第４象限のビ
ードの深さは第１と第２象限より浅くなくてはならな
い。In the case of beads, beads extending over the first and fourth quadrants and beads extending over the second and third quadrants may be arranged. In this case, the bead depth in the third and fourth quadrants must be shallower than in the first and second quadrants.
【００２４】ビードは連続したビードでなく、各象限に
分れて配置してもよく、ビードの一端が周縁溝外壁の天
板とほぼ同じ高さの位置から天板の中心に向かって１２
ｍｍの巾の周縁溝に沿った同心円環状部分の開口片先端
と天板の中心を結ぶ線より天板の中心から２５度〜６５
度の範囲内にあれば他端はこの範囲の外例えば天板の中
心側にあってもよい。このようなビードは第３および第
４象限にも配置するとバックリングの位置の制御に有効
である。第３、第４象限の周縁側のビード先端の深さは
第１、第２象限のビードより浅い。The beads may be arranged in each quadrant instead of being continuous beads, and one end of the bead is 12 from the position where the one end of the bead is almost at the same height as the top plate of the outer wall of the peripheral groove toward the center of the top plate.
25 degrees to 65 degrees from the center of the top plate from the line connecting the tip of the opening piece of the concentric annular portion along the peripheral groove with a width of mm and the center of the top plate.
If it is within the range of degrees, the other end may be outside this range, for example, on the center side of the top plate. If such beads are arranged in the third and fourth quadrants, they are effective for controlling the position of the buckling. The depth of the bead tip on the peripheral side of the third and fourth quadrants is shallower than that of the beads in the first and second quadrants.
【００２５】この他、座屈部を周縁溝内壁を天板の中心
側に向けて部分的に変形させて形成したり周縁溝外壁を
天板の中心側に向けて部分的に変形させて形成すること
も出来る。天板中心と反対側に部分的に変形させてもよ
い。変形された部分は構造的な不連続と、残留応力によ
り座屈性が大きくなりそこでバックリングする。In addition, the buckling portion is formed by partially deforming the inner wall of the peripheral groove toward the center side of the top plate or forming the outer wall of the peripheral groove partially deforming toward the center side of the top plate. You can also do it. It may be partially deformed on the side opposite to the center of the top plate. Due to structural discontinuity and residual stress, the deformed part becomes buckled and buckles there.
【００２６】さらに、周縁溝の底部であるチャックウオ
ールラジアスを部分的に薄肉とした薄肉部も座屈部とし
て有効である。底部を部分的に薄肉にしてもよい。これ
等の場合も薄肉部は前記の蓋の位置になくてはならな
い。本発明においては、これ等の座屈部を適宜併用する
ことも出来る。Further, a thin portion in which the chuck wall radius which is the bottom of the peripheral groove is partially thin is also effective as the buckling portion. The bottom may be partially thinned. In these cases as well, the thin-walled portion must be at the position of the lid. In the present invention, these buckling portions may be appropriately used together.
【００２７】天板と周縁溝の連結部分にコイニングによ
る薄肉強化部を設けると蓋の耐強度が大きくなる効果が
ある。この場合も座屈部が配設され座屈部の効果はコイ
ニングの補強効果より大きいのでバックリングは確実に
座屈部の位置で発生する。Providing a thin-walled reinforcing portion by coining at the connecting portion between the top plate and the peripheral groove has the effect of increasing the strength of the lid. Also in this case, since the buckling portion is provided and the effect of the buckling portion is greater than the reinforcing effect of the coining, the buckling surely occurs at the position of the buckling portion.
【００２８】[0028]
【実施例】次に、本発明を実施例をあげて具体的に説明
する。EXAMPLES Next, the present invention will be specifically described with reference to examples.
【００２９】図１は本発明の実施例である罐蓋の説明図
である。図１で１は蓋の天板であり２は周縁溝である。
３はタブであってリベット４によって天板に結合されて
いる。５はスコアであり６はスコアに囲まれた開口片で
ある。タブ先端により押し下げられるとスコアが破断
し、開口片が下方に押し下げられて飲み口が形成され
る。Ｙは開口片先端と蓋の中心を通る直線でＹ軸とい
う。Ｘは蓋の中心でＹ軸と直交する直線でＸ軸という。
Ｘ軸とＹ軸は説明上引いた線で蓋にある構造ではない。
Ｘ軸とＹ軸によって区画された第１象限８の周縁溝付近
に座屈部であるコイニングにより形成した溝７が配置さ
れている。溝７はＹ軸から４５度の位置にある。そして
開口片側の第３象限１０と第４象限１１には座屈部は配
設されていない。図１では座屈部は第１象限に配置した
が、第２象限９に配置しても同じである。初回のバック
リングは座屈部を設けた、第１または第２象限に発生す
る。バックリングによる変形量の多い初回のバックリン
グを開口片の反対側の第１または第２象限で発生させる
ので開口スコア５の破断の危険は少ない。FIG. 1 is an explanatory view of a can lid which is an embodiment of the present invention. In FIG. 1, 1 is a top plate of the lid and 2 is a peripheral groove.
A tab 3 is connected to the top plate by a rivet 4. 5 is a score and 6 is an opening piece surrounded by the score. When pushed down by the tip of the tab, the score breaks and the opening piece is pushed down to form a drinking mouth. Y is a straight line passing through the tip of the opening piece and the center of the lid and is called the Y axis. X is a straight line that is orthogonal to the Y axis at the center of the lid and is called the X axis.
The X-axis and the Y-axis are lines drawn for the purpose of explanation, and are not the structure on the lid.
A groove 7 formed by coining, which is a buckling portion, is arranged near the peripheral groove of the first quadrant 8 partitioned by the X axis and the Y axis. The groove 7 is located at 45 degrees from the Y axis. The buckling portion is not provided in the third quadrant 10 and the fourth quadrant 11 on one side of the opening. Although the buckling portion is arranged in the first quadrant in FIG. 1, it is the same even if it is arranged in the second quadrant 9. The first buckling occurs in the first or second quadrant where the buckling portion is provided. Since the first buckling with a large amount of deformation due to the buckling is generated in the first or second quadrant on the opposite side of the opening piece, the risk of breaking the opening score 5 is small.
【００３０】図２は座屈部７を第１象限と第２象限に配
設した。初回のバックリングは第１象限と第２象限のい
ずれかに発生し、２回目は残りの象限に発生するが座屈
部のない第３象限と第４象限には発生しない。変形量が
最大である初回のバックリングと変形量が２番目に大き
い２回目のバックリングを開口片の反対側の象限で発生
させるのでスコア５の破断の危険は非常に少なくなる。In FIG. 2, the buckling portions 7 are arranged in the first quadrant and the second quadrant. The first buckling occurs in either the first quadrant or the second quadrant, and the second time occurs in the remaining quadrants, but not in the third and fourth quadrants without buckling. Since the first buckling with the largest deformation amount and the second buckling with the second largest deformation amount are generated in the quadrant on the opposite side of the opening piece, the risk of breaking the score 5 is very small.
【００３１】図３は、座屈部を第３象限と第４象限にも
配置した。勿論どちらが１ヶ所でも良い。第３象限と第
４象限に配置する座屈部は座屈性が第１象限と第２象限
の座屈部より小さくなくてはならない。この例では第
３、４象限のコイニング溝の深さが第１、２象限のコイ
ニング溝より浅い必要がある。図３の蓋はバックリング
が第１、２象限で発生した後、第３、４象限で順次発生
する。In FIG. 3, the buckling portions are also arranged in the third and fourth quadrants. Of course, either one may be in one place. The buckling portions arranged in the third quadrant and the fourth quadrant must be less buckling than the buckling portions in the first and second quadrants. In this example, the depth of the coining grooves in the third and fourth quadrants needs to be shallower than that of the coining grooves in the first and second quadrants. In the lid of FIG. 3, buckling occurs in the first and second quadrants and then sequentially in the third and fourth quadrants.
【００３２】図１〜図４で座屈部は、Ｙ軸またはＸ軸よ
り４５度の位置にある。２５度６５度の範囲にないとバ
ックリングした時の形状がスコア破断を防止する効果を
劣化させ、また次のバックリングの位置を所定の位置か
ら移動する危険がある。コインニグ溝に代ってスコア溝
を配置してもよい。In FIGS. 1 to 4, the buckling portion is located at a position of 45 degrees from the Y axis or the X axis. If it is not within the range of 25 degrees and 65 degrees, the shape when buckling deteriorates the effect of preventing score breakage, and there is a risk of moving the position of the next buckling from a predetermined position. A score groove may be arranged instead of the coin nig groove.
【００３３】図４は座屈部として凸部デインプル１２を
象限に設けた蓋である。勿論どちらかに設けたものも含
まれる。デインプルは天板を押し上げて形成される。FIG. 4 shows a lid in which a convex dimple 12 is provided as a buckling portion in a quadrant. Of course, the one provided in either side is also included. The dimples are formed by pushing up the top plate.
【００３４】図５は、エンボッシングして座屈部である
周縁溝近傍に広がる凹所１３を形成した例である。この
例ではエンボス凹所は第１象限と第２象限にまたがって
いる。エンボス凹所の変化の大きい尖端部１４が第１象
限と第２象限の周縁溝の付近で且つＹ軸から２５度〜６
５度の範囲になければならない。図５では４５度の位置
にある。バックリングは尖端部１４で発生する。FIG. 5 shows an example in which a recess 13 is formed by embossing to spread near the peripheral groove which is a buckling portion. In this example, the embossed recess spans the first and second quadrants. The sharp tip 14 of the embossed recess having a large change is located near the peripheral groove in the first quadrant and the second quadrant, and is 25 degrees to 6 degrees from the Y axis.
Must be within 5 degrees. In FIG. 5, it is at a position of 45 degrees. Buckling occurs at the tip 14.
【００３５】図６は、図５のエンボス凹所１３の中に更
にエンボッシングより、深い凹所１５を設け該凹所の変
形尖端部１６を第１象限と第２象限のＹ軸から４５度の
位置に配置した。この蓋は座屈部の座屈性が向上するの
でバックリングの位置がより確実される。バックリング
は１６で発生する。In FIG. 6, a deeper recess 15 is further provided by embossing in the embossing recess 13 of FIG. 5, and the deformed tip portion 16 of the recess is formed at 45 degrees from the Y axis in the first and second quadrants. Placed in position. This lid improves the buckling property of the buckling portion, so that the position of the buckling is more secured. Buckling occurs at 16.
【００３６】図７は座屈部としてビードを周縁溝付近に
配設した例である。ビード１７は第１象限と第２象限に
またがっている。ビードを形成するとビード自体は耐圧
強度は大となるがビード部と普通部の境では金属板はビ
ード側に引っ張られる。ビードの先端１８で金属板にい
わゆるひきつれが発生し天板の円周方向のバランスが崩
れておりこの点が座屈部となる。先端部１８はＹ軸から
４５度の位置で且つ周縁溝の近くに配置されている。FIG. 7 shows an example in which a bead is arranged near the peripheral groove as a buckling portion. Bead 17 straddles the first and second quadrants. When the bead is formed, the pressure strength of the bead itself becomes large, but the metal plate is pulled to the bead side at the boundary between the bead part and the normal part. The metal plate is so-called twitch at the tip 18 of the bead, and the balance of the top plate in the circumferential direction is lost, and this point becomes the buckling portion. The tip portion 18 is arranged at a position of 45 degrees from the Y axis and near the peripheral groove.
【００３７】図８は座屈部である２本のビードを第１象
限と第４象限、第２象限と第３象限に夫々またがらせて
配設した蓋である。ビードは周縁溝に沿いその先端は４
つの象限の全てに配置されている。そして夫々Ｙ軸から
４５度で且つ周縁溝の近くに設けられている。そして、
第１、第２象限にあるビード先端部１８より第４、３象
限にあるビード先端部１９は深さが浅く座屈性が小さい
ので、初回と２回目のバックリングは第１、２象限に発
生しついで３回目と４回目が第３、第４象限に発生す
る。FIG. 8 shows a lid in which two beads, which are buckling parts, are arranged in the first and fourth quadrants, and in the second and third quadrants, respectively. The bead runs along the peripheral groove and its tip is 4
It is located in all four quadrants. Each of them is provided at 45 degrees from the Y axis and near the peripheral groove. And
Since the bead tips 19 in the fourth and third quadrants are shallower and have less buckling properties than the bead tips 18 in the first and second quadrants, the first and second bucklings are performed in the first and second quadrants. Then, the third and fourth times occur in the third and fourth quadrants.
【００３８】図９はビードが周縁溝に沿っていない例で
ある。この場合もビード先端は、夫々Ｙ軸から４５度で
且つ周縁溝の近くに設けられている。そして、第１、第
２象限にあるビード先端部１８より第４、３象限にある
ビード先端部１９は深さが浅く座屈性が小さいので、初
回と２回目のバックリングは第１、２象限に発生しつい
で３回目と４回目が第３、第４象限に発生する。FIG. 9 shows an example in which the beads are not along the peripheral groove. Also in this case, the bead tips are provided at 45 degrees from the Y axis and near the peripheral groove. The bead tips 19 in the fourth and third quadrants are shallower and have less buckling properties than the bead tips 18 in the first and second quadrants. It occurs in the quadrant, and then the third and fourth times occur in the third and fourth quadrants.
【００３９】図１０は座屈部が周縁溝２の内壁２０を天
板１の中心側に向けて部分的に変形させた変形内壁２０
である蓋である。周縁溝部の断面を示す図１１の周縁溝
２の内壁２１を天板中心側に向かって変形させるが、図
１２のように内壁全体を変形してもよく、図１３のよう
に一部を変形してもよい。また天板の中心と反対側に変
形させてもよい。周縁溝内壁に部分的に設けられた変形
部分２０は、構造的不連続性と、残留応力により座屈性
が大きくなり、ここでバックリングが発生する。図１４
は座屈部が周縁溝２の外壁２２の１部分を天板の中心反
対側に部分的に変形させた変形外壁２０である蓋であ
る。図１５は座屈部が周縁溝２の外壁２２の全体を天板
の中心反対側に部分的に変形させた変形外壁２０である
蓋である。これ等の蓋においてはバックリングは周縁溝
の変形部分を起点として発生する。FIG. 10 shows a deformed inner wall 20 in which the buckling portion partially deforms the inner wall 20 of the peripheral groove 2 toward the center of the top plate 1.
Is a lid. The inner wall 21 of the peripheral groove 2 of FIG. 11 showing the cross section of the peripheral groove portion is deformed toward the center of the top plate, but the entire inner wall may be deformed as shown in FIG. 12 or a part thereof is deformed as shown in FIG. You may. Further, it may be deformed to the side opposite to the center of the top plate. The deformed portion 20 partially provided on the inner wall of the peripheral groove has a large buckling property due to structural discontinuity and residual stress, and buckling occurs here. 14
Is a lid whose buckling portion is a deformed outer wall 20 obtained by partially deforming a part of the outer wall 22 of the peripheral groove 2 to the side opposite to the center of the top plate. FIG. 15 shows a lid whose buckling portion is a deformed outer wall 20 obtained by partially deforming the entire outer wall 22 of the peripheral groove 2 to the side opposite to the center of the top plate. In these lids, the buckling starts from the deformed portion of the peripheral groove.
【００４０】図１６は座屈部が周縁溝の底部に部分的に
設けた薄肉部２３である蓋である。図１７は座屈部が周
縁溝の底部のチャックオールラジアスに部分的に設けた
薄肉部２４である蓋である。この図１６と図１７の蓋の
場合はバックリングはこの溝の薄肉部で発生する。FIG. 16 shows a lid in which the buckling portion is a thin portion 23 partially provided at the bottom of the peripheral groove. FIG. 17 shows a lid in which the buckling portion is a thin portion 24 partially provided in the chuck all-radius at the bottom of the peripheral groove. In the case of the lid shown in FIGS. 16 and 17, buckling occurs at the thin portion of this groove.
【００４１】図１８は第３図に示す蓋を設けた罐のバッ
クリングした状態を示し、蓋はドーム状に盛り上がって
いる。バックリングは座屈部７で発生し、周囲の天板１
を上方に持上げる。この例ではバックリングは４回発生
した。第１、第２象限の所定の位置で初回、２回目が発
生し、変形量の少ない３回目と４回目が第３、第４象限
の所定の位置で発生し、蓋は大きく外方に盛り上がって
いる。しかしながらバックリングの位置と順序を制御し
ているのでスコア５は破断しなかった。FIG. 18 shows a state in which the can provided with the lid shown in FIG. 3 is buckled, and the lid is raised like a dome. Buckling occurs at the buckling part 7, and the surrounding top plate 1
Lift up. In this example, buckling occurred 4 times. The first and second times occur at the predetermined positions in the first and second quadrants, the third and fourth times with less deformation occur at the predetermined positions in the third and fourth quadrants, and the lid largely bulges outward. ing. However, score 5 did not break because the buckling position and sequence were controlled.
【００４２】図１９はビードの深い端部が周縁溝付近の
所定の位置にあり、他端が蓋の中心に向かっている弧状
のビードであり蓋の全扇形状部に配置されている例であ
る。バックリングは深い方のビード先端１８で発生す
る。図２０は直線状のビードとした例である。これ等の
蓋では第１、第２象限の次に第３、第４象限でバックリ
ングする。FIG. 19 shows an example in which the deep end of the bead is a predetermined position near the peripheral groove and the other end is an arc-shaped bead that is directed toward the center of the lid and is arranged in the entire fan-shaped portion of the lid. is there. Buckling occurs at the deeper bead tip 18. FIG. 20 shows an example of a linear bead. These lids buckle in the third and fourth quadrants after the first and second quadrants.
【００４３】図２１は、蓋全体の耐圧性を大きくするた
め周縁溝と天板の連結部にコイニングによる強化薄肉部
２７を一周して配設した。連続して配置しなくても耐圧
補強効果は大きい。勿論座屈部が配置されている。座屈
部の効果は大きいのでコイニング補強部があってもバッ
クリングは必ず座屈部で発生する。次に比較試験の結果
を示す。In FIG. 21, in order to increase the pressure resistance of the entire lid, a thin portion 27 reinforced by coining is arranged around the connecting portion between the peripheral groove and the top plate. Even if they are not arranged consecutively, the pressure resistance reinforcing effect is great. Of course, the buckling part is arranged. Since the effect of the buckling part is great, buckling always occurs at the buckling part even if there is a coining reinforcement part. Next, the results of the comparative test are shown.
【００４４】比較試験 実施例１ 肉厚０．２５ｍｎのアルミ板で成形した図１の蓋をアル
ミ罐胴に捲締めた罐を使用した。 実施例２ 図３の蓋を用いた以外は実施例１と同様にした。 比較例１ 座屈部のない蓋を用いた以外は実施例１と同様にした。 比較例２ コイニング溝の座屈部を第３象限のみに設けた。各罐１
００本に４Ｇ．Ｖ．の炭酸水を充填して直射日光に当て
てバックリングを発生させ炭酸水の吹出した罐をカウン
トした。試験結果を表１に示す。Comparative Test Example 1 A can was used in which the lid of FIG. 1 formed from an aluminum plate having a wall thickness of 0.25 nm was wound around an aluminum can barrel. Example 2 The same as Example 1 except that the lid shown in FIG. 3 was used. Comparative Example 1 The procedure of Example 1 was repeated except that a lid having no buckling portion was used. Comparative Example 2 The buckling portion of the coining groove was provided only in the third quadrant. Each can 1
4G. V. The carbonated water of No. 1 was filled and exposed to direct sunlight to generate buckling, and the number of cans of carbonated water blown out was counted. The test results are shown in Table 1.
【００４５】[0045]
【表１】 [Table 1]
【００４６】[0046]
【発明の効果】本発明の罐蓋はバックリングによるスコ
ア線の破断が少い優れた効果を奏する。EFFECTS OF THE INVENTION The can lid of the present invention has an excellent effect in that the score line is less broken due to buckling.
【図１】本発明の罐蓋の座屈部説明図である。FIG. 1 is an explanatory view of a buckling portion of a can lid of the present invention.
【図２】本発明の罐蓋の座屈部説明図である。FIG. 2 is an explanatory view of a buckling portion of the can lid of the present invention.
【図３】本発明の罐蓋の座屈部説明図である。FIG. 3 is an explanatory view of a buckling portion of the can lid of the present invention.
【図４】本発明の罐蓋の座屈部説明図である。FIG. 4 is an explanatory view of a buckling portion of the can lid of the present invention.
【図５】本発明の罐蓋の座屈部説明図である。FIG. 5 is an explanatory view of a buckling portion of the can lid of the present invention.
【図６】本発明の罐蓋の座屈部説明図である。FIG. 6 is an explanatory view of a buckling portion of the can lid of the present invention.
【図７】本発明の罐蓋の座屈部説明図である。FIG. 7 is an explanatory view of the buckling portion of the can lid of the present invention.
【図８】本発明の罐蓋の座屈部説明図である。FIG. 8 is an explanatory view of a buckling portion of the can lid of the present invention.
【図９】本発明の罐蓋の座屈部説明図である。FIG. 9 is an explanatory view of the buckling portion of the can lid of the present invention.
【図１０】本発明の罐蓋の座屈部説明図である。FIG. 10 is an explanatory view of the buckling portion of the can lid of the present invention.
【図１１】蓋の周縁溝部の断面図である。FIG. 11 is a cross-sectional view of a peripheral groove portion of the lid.
【図１２】本発明の蓋の周縁溝壁の座屈部の説明図であ
る。FIG. 12 is an explanatory view of a buckling portion of a peripheral groove wall of the lid of the present invention.
【図１３】本発明の蓋の周縁溝壁の座屈部の説明図であ
る。FIG. 13 is an explanatory view of the buckling portion of the peripheral groove wall of the lid of the present invention.
【図１４】本発明の蓋の周縁溝壁の座屈部の説明図であ
る。FIG. 14 is an explanatory view of a buckling portion of a peripheral groove wall of the lid of the present invention.
【図１５】本発明の蓋の周縁溝壁の座屈部の説明図であ
る。FIG. 15 is an explanatory view of the buckling portion of the peripheral groove wall of the lid of the present invention.
【図１６】本発明の蓋の周縁溝底部の座屈部の説明図で
ある。FIG. 16 is an explanatory view of a buckling portion of the bottom of the peripheral groove of the lid of the present invention.
【図１７】本発明の蓋の周縁溝底部のチャックオールラ
ジアスの座屈部の説明図である。FIG. 17 is an explanatory view of the buckling portion of the chuck all-radius at the bottom of the peripheral groove of the lid of the present invention.
【図１８】本発明の蓋を用いた罐のバックリングした状
態を示す説明図である。FIG. 18 is an explanatory view showing a buckled state of a can using the lid of the present invention.
【図１９】本発明の罐蓋の座屈部説明図である。FIG. 19 is an explanatory view of the buckling portion of the can lid of the present invention.
【図２０】本発明の罐蓋の座屈部説明図である。FIG. 20 is an explanatory view of the buckling portion of the can lid of the present invention.
【図２１】本発明の罐蓋の座屈部説明図である。FIG. 21 is an explanatory view of the buckling portion of the can lid of the present invention.
１ 天板 ２ 周縁溝 ３ タブ ４ リベット ５ 開口スコア ６ 開口片 ７ スコア溝 ８ 第１象限 ９ 第２象限 １０ 第３象限 １１ 第４象限 １２ デインプル １３ エンボス凹所 １４ エンボス凹所尖端部 １５ エンボス深凹所 １６ エンボス深凹所尖端部 １７ ビード １８ ビード先端 １９ 浅いビード先端 ２０ 変形壁 ２１ 内壁 ２２ 外壁 ２３ 薄肉底部 ２４ 薄肉チャックオールラジアス ２５ Ｙ軸 ２６ Ｘ軸 ２７ 連結部コイニング 1 top plate 2 peripheral groove 3 tab 4 rivet 5 opening score 6 opening piece 7 score groove 8 first quadrant 9 second quadrant 10 third quadrant 11 fourth quadrant 12 dimple 13 embossing recess 14 embossing recess tip 15 embossing depth Recess 16 Emboss Deep Recess Point 17 Bead 18 Bead Tip 19 Shallow Bead Tip 20 Deformed Wall 21 Inner Wall 22 Outer Wall 23 Thin Wall Bottom 24 Thin Wall Chuck All-Radius 25 Y Axis 26 X Axis 27 Joint Coining
Claims (20)
する罐蓋であって、天板のほぼ中央部にリベットにより
連結したタブと、始点と終点をリベット前方でかつヒン
ジとなる間隔を設けて配置したスコアと、スコアに囲ま
れた開口片とからなる容易開口罐蓋であって、該罐蓋を
開口片先端と天板の中心を結ぶ線とこの線に対して天板
の中心を通って直交する直線で扇状の４部分に区分けし
たとき開口片と反対側にある２つの扇状の部分の何れか
１方又は両方の周縁溝外壁の天板とほぼ同じ高さの位置
から天板の中心に向かって１２ｍｍの巾の周縁溝に沿っ
た同心円環状部分の前記の開口片先端と天板の中心を結
ぶ線より天板の中心から２５度〜６５度の範囲内に座屈
部を配設した容易開口罐蓋。1. A can lid having a top plate and a peripheral groove provided in a peripheral portion of the top plate, wherein a tab connected to the top plate at a substantially central portion by a rivet, a start point and an end point in front of the rivet, and a hinge. An easy-opening can lid consisting of scores arranged at intervals and an opening piece surrounded by the scores, wherein the can lid is a line connecting the tip of the opening piece and the center of the top plate and the ceiling to this line. When divided into four fan-shaped sections with straight lines passing through the center of the plate, one of the two fan-shaped sections on the opposite side of the opening piece or both of the peripheral grooves of the same height as the top plate of the outer wall From the position to the center of the top plate, within a range of 25 to 65 degrees from the center of the top plate from the line connecting the tip of the opening piece of the concentric annular portion along the peripheral groove with a width of 12 mm and the center of the top plate. Easy opening can lid with buckling part.
か１方又は両方の周縁溝外壁の天板と同じ高さの位置か
ら天板の中心に向かって１２ｍｍの周縁溝に沿った同心
円環状部分の前記の開口片先端と天板の中心を結ぶ線よ
り天板の中心から２５度〜６５度の範囲にも、開口片と
反対側にある２つの扇状の部分に設けた座屈部より座屈
性の小さい座屈部を配設した、請求項１に記載された容
易開口罐蓋。2. A concentric circle extending along a peripheral groove of 12 mm from a position at the same height as the top plate of the outer wall of the peripheral groove of any one or both of the two fan-shaped portions on one side of the opening toward the center of the top plate. A buckling part provided in two fan-shaped parts on the opposite side of the opening piece in the range of 25 degrees to 65 degrees from the center of the top plate from the line connecting the tip of the opening piece of the annular portion and the center of the top board. The easy opening can lid according to claim 1, wherein a buckling portion having a smaller buckling property is provided.
により天板に形成された溝である、請求項１または２に
記載された容易開口罐蓋。3. The easy opening can lid according to claim 1, wherein the buckling portion is a groove formed in the top plate by coining or scoring.
された凹所である、請求項１または２に記載された容易
開口罐蓋。4. The easy opening can lid according to claim 1, wherein the buckling portion is a recess formed in the top plate by embossing.
たディンプルである、請求項１または２に記載された容
易開口罐蓋。5. The easy opening can lid according to claim 1, wherein the buckling portion is a dimple formed by pushing up the top plate to form the top plate.
けて部分的に変形させた変形内壁部である、請求項１ま
たは２に記載された容易開口罐蓋。6. The easy opening can lid according to claim 1, wherein the buckling portion is a deformed inner wall portion obtained by partially deforming the peripheral groove inner wall toward the center side of the top plate.
側に向けて部分的に変形させた変形内壁部である、請求
項１または２に記載された容易開口罐蓋。7. The easy opening can lid according to claim 1, wherein the buckling portion is a deformed inner wall portion obtained by partially deforming the peripheral groove inner wall toward the side opposite to the center of the top plate.
けて部分的に変形させた変型外壁部である、請求項１ま
たは２に記載された容易開口罐蓋。8. The easy opening can lid according to claim 1 or 2, wherein the buckling portion is a modified outer wall portion obtained by partially deforming the peripheral groove outer wall toward the center side of the top plate.
側に向けて部分的に変形させた変型外壁部である、請求
項１または２に記載された容易開口罐蓋。9. The easy opening can lid according to claim 1, wherein the buckling portion is a modified outer wall portion obtained by partially deforming the peripheral groove outer wall toward the side opposite to the center of the top plate.
とした薄肉部である、請求項１または２に記載された容
易開口罐蓋。10. The easy opening can lid according to claim 1, wherein the buckling portion is a thin portion in which a bottom portion of the peripheral groove is partially thin.
ジアスを部分的に薄肉とした薄肉部である、請求項１ま
たは２に記載された容易開口罐蓋。11. The easy opening can lid according to claim 1 or 2, wherein the buckling portion is a thin portion in which the chuck wall radius of the peripheral groove is partially thin.
成したビードの先端である、請求項１または２に記載さ
れた容易開口罐蓋。12. The easy opening can lid according to claim 1, wherein the buckling portion is a tip of a bead formed on the top plate by beading.
先端である、請求項１２に記載された容易開口罐蓋。13. The easy opening can lid according to claim 12, wherein the buckling portion is a tip of a straight or arc-shaped bead.
けられているビードの先端である、請求項１２または１
３のいずれか１項に記載された容易開口罐蓋。14. The buckling portion is the tip of a bead provided along the vicinity of the peripheral groove of the top plate.
The easy opening can lid described in any one of 3 above.
扇状の部分に跨がっているビードの先端である、請求項
１２ないし１４のいずれか１項に記載された容易開口罐
蓋。15. The easy-opening can according to claim 12, wherein the buckling portion is a tip of a bead straddling two fan-shaped portions on the side opposite to the opening piece. lid.
扇状部分の夫々と開口片側にある２つの扇状部分の夫々
に跨がって配設されているビードの先端であり、開口片
側の扇状部分のビードの先端深さが反対側より浅いビー
ドである、請求項１２または１３に記載された容易開口
罐蓋。16. The tip of a bead, the buckling portion of which is disposed across each of the two fan-shaped portions on the side opposite to the opening piece and each of the two fan-shaped portions on the opening piece side, The easy-opening can lid according to claim 12 or 13, wherein the bead of the bead of the fan-shaped portion on one side is shallower than the bead on the opposite side.
ほぼ同じ高さの位置から天板の中心に向かって１２ｍｍ
の巾の周縁溝に沿った同心円環状部分の開口片先端と天
板の中心を結ぶ線より天板の中心から２５度〜６５度の
範囲内にあり、他端がこの範囲より天板の中心側にある
直線状または弧状の２本のビードの周縁溝側の先端であ
って開口片と反対側にある２つの扇状の部分に夫々配置
されている、請求項１２または１３に記載された容易開
口罐蓋。17. The buckling portion is 12 mm toward the center of the top plate from a position where one end is approximately the same height as the top plate of the outer peripheral wall of the peripheral groove.
Is within the range of 25 degrees to 65 degrees from the center of the top plate from the line connecting the tip of the opening piece of the concentric annular part along the peripheral groove of the width of the top plate and the center of the top plate, and the other end is the center of the top plate from this range. 14. The ease according to claim 12 or 13, wherein the two ends of the two straight or arc-shaped beads on the side of the peripheral groove side are respectively arranged in two fan-shaped portions on the side opposite to the opening piece. Open can lid.
ほぼ同じ高さの位置から天板の中心に向かって１２ｍｍ
の巾の周縁溝に沿った同心円環状部分の開口片先端と天
板の中心を結ぶ線より天板の中心から２５度〜６５度の
範囲内にあり、他端がこの範囲より天板の中心側にある
直線状または弧状の４本のビードの周縁溝側の先端であ
って全ての扇状の部分に配置されている、請求項１２ま
たは１３に記載された容易開口罐蓋。18. The buckling portion is 12 mm toward the center of the top plate from a position where one end is substantially the same height as the top plate of the peripheral groove outer wall.
Is within the range of 25 degrees to 65 degrees from the center of the top plate from the line connecting the tip of the opening piece of the concentric annular part along the peripheral groove of the width of the top plate and the center of the top plate, and the other end is the center of the top plate from this range. The easy opening can lid according to claim 12 or 13, which is arranged at all the fan-shaped portions at the tips on the peripheral groove side of the four linear or arc-shaped beads on the side.
て、該弧状のビードの先端が開口片と反対側にある２つ
の扇状の部分の夫々と開口片側にある２つの扇状の部分
の夫々にに跨がって配設されており該弧状のビードが蓋
の中心側に凸に形成された、請求項１２または１３に記
載された容易開口罐蓋。19. The buckling portion is the tip of an arc-shaped bead, and the tip of the arc-shaped bead has two fan-shaped portions on the side opposite to the opening piece and two fan-shaped portions on the opening piece side, respectively. The easy-opening can lid according to claim 12 or 13, wherein the arc-shaped beads are provided so as to straddle each other and are formed so as to be convex toward the center side of the lid.
よる薄肉強化部を配設した、請求項１ないし１９のいず
れか１項に記載された容易開口罐蓋。20. The easy opening can lid according to any one of claims 1 to 19, wherein a thin-walled reinforcing portion formed by coining is arranged at a connecting portion between the top plate and the peripheral groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3333819A JP2799795B2 (en) | 1991-10-18 | 1991-10-18 | Easy opening can lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3333819A JP2799795B2 (en) | 1991-10-18 | 1991-10-18 | Easy opening can lid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05112357A true JPH05112357A (en) | 1993-05-07 |
| JP2799795B2 JP2799795B2 (en) | 1998-09-21 |
Family
ID=18270304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3333819A Expired - Fee Related JP2799795B2 (en) | 1991-10-18 | 1991-10-18 | Easy opening can lid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2799795B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0663346A1 (en) * | 1994-01-18 | 1995-07-19 | Toyo Seikan Kaisha Limited | Easily openable can lid |
| US5685449A (en) * | 1995-01-24 | 1997-11-11 | Brockway Standard, Inc. | Lug lid for materials container with sacrificial depressions and annular expansion bead |
| US5829623A (en) * | 1992-12-08 | 1998-11-03 | Toyo Seikan Kaisha, Ltd. | Easily openable can lid |
| US6761280B2 (en) * | 2001-12-27 | 2004-07-13 | Alcon Inc. | Metal end shell and easy opening can end for beer and beverage cans |
| JP2008105740A (en) * | 2006-10-27 | 2008-05-08 | Toyo Seikan Kaisha Ltd | Easily unsealable container and method for manufacturing the same |
| JP2009067407A (en) * | 2007-09-11 | 2009-04-02 | Daiwa Can Co Ltd | Easy-to-open can lid |
| US7819275B2 (en) | 2001-07-03 | 2010-10-26 | Container Development, Ltd. | Can shell and double-seamed can end |
| US8157119B2 (en) | 2002-04-22 | 2012-04-17 | Crown Packaging Technology, Inc. | Can end |
| US8931660B2 (en) | 2001-07-03 | 2015-01-13 | Ball Corporation | Can shell and double-seamed can end |
| EP2969800A1 (en) * | 2013-03-15 | 2016-01-20 | Ball Corporation | Container end closure with buckle control feature |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6260526U (en) * | 1985-10-03 | 1987-04-15 | ||
| JPH02148932U (en) * | 1989-05-18 | 1990-12-18 | ||
| JPH0314455A (en) * | 1989-06-06 | 1991-01-23 | Kazuo Ariyoshi | Recess for use in unstoppering beverage can |
-
1991
- 1991-10-18 JP JP3333819A patent/JP2799795B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6260526U (en) * | 1985-10-03 | 1987-04-15 | ||
| JPH02148932U (en) * | 1989-05-18 | 1990-12-18 | ||
| JPH0314455A (en) * | 1989-06-06 | 1991-01-23 | Kazuo Ariyoshi | Recess for use in unstoppering beverage can |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5829623A (en) * | 1992-12-08 | 1998-11-03 | Toyo Seikan Kaisha, Ltd. | Easily openable can lid |
| EP0663346A1 (en) * | 1994-01-18 | 1995-07-19 | Toyo Seikan Kaisha Limited | Easily openable can lid |
| US5685449A (en) * | 1995-01-24 | 1997-11-11 | Brockway Standard, Inc. | Lug lid for materials container with sacrificial depressions and annular expansion bead |
| US8931660B2 (en) | 2001-07-03 | 2015-01-13 | Ball Corporation | Can shell and double-seamed can end |
| US10843845B2 (en) | 2001-07-03 | 2020-11-24 | Ball Corporation | Can shell and double-seamed can end |
| US10246217B2 (en) | 2001-07-03 | 2019-04-02 | Ball Corporation | Can shell and double-seamed can end |
| US7819275B2 (en) | 2001-07-03 | 2010-10-26 | Container Development, Ltd. | Can shell and double-seamed can end |
| US9371152B2 (en) | 2001-07-03 | 2016-06-21 | Ball Corporation | Can shell and double-seamed can end |
| US6761280B2 (en) * | 2001-12-27 | 2004-07-13 | Alcon Inc. | Metal end shell and easy opening can end for beer and beverage cans |
| US8496132B2 (en) | 2002-04-22 | 2013-07-30 | Crown Packaging Technology, Inc. | Can end |
| US8851323B2 (en) | 2002-04-22 | 2014-10-07 | Crown Packaging Technology, Inc. | Can end |
| US8157119B2 (en) | 2002-04-22 | 2012-04-17 | Crown Packaging Technology, Inc. | Can end |
| JP2008105740A (en) * | 2006-10-27 | 2008-05-08 | Toyo Seikan Kaisha Ltd | Easily unsealable container and method for manufacturing the same |
| JP2009067407A (en) * | 2007-09-11 | 2009-04-02 | Daiwa Can Co Ltd | Easy-to-open can lid |
| EP2969800A1 (en) * | 2013-03-15 | 2016-01-20 | Ball Corporation | Container end closure with buckle control feature |
| EP2969800A4 (en) * | 2013-03-15 | 2017-04-05 | Ball Corporation | Container end closure with buckle control feature |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2799795B2 (en) | 1998-09-21 |
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