JPH01308744A - Easily opening can lid with inseparable tab - Google Patents
Easily opening can lid with inseparable tabInfo
- Publication number
- JPH01308744A JPH01308744A JP12601788A JP12601788A JPH01308744A JP H01308744 A JPH01308744 A JP H01308744A JP 12601788 A JP12601788 A JP 12601788A JP 12601788 A JP12601788 A JP 12601788A JP H01308744 A JPH01308744 A JP H01308744A
- Authority
- JP
- Japan
- Prior art keywords
- tab
- line
- lid
- weakness
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 abstract description 9
- 230000002265 prevention Effects 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 8
- 230000003313 weakening effect Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000035622 drinking Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 235000016213 coffee Nutrition 0.000 description 1
- 235000013353 coffee beverage Nutrition 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Containers Opened By Tearing Frangible Portions (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は裂断部を缶内に押し込み、裂断部およびタブが
缶蓋のパネル面から分離しない構造としたタブ不分離型
容易開放缶蓋に係わり、特に裂断部内の平面形状の改良
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a tab non-separable type easy-open can that has a structure in which the torn part is pushed into the can and the torn part and tab do not separate from the panel surface of the can lid. The present invention relates to lids, and particularly to improving the planar shape within the tear portion.
近年、ビール、ジュース、コーヒーなどの飲料缶の容易
開放缶蓋として、タブ(裂断部も含めて)を缶蓋から分
離せずに開缶するタブ不分離方式が広く採用されはじめ
てきた。この種のタブ不分離方式は除去されたタブの散
乱による環境の汚染あるいは思わぬ怪我等を防止する等
の点で従来のタブ分離方式に比べて優れた開缶方式と言
える。In recent years, a non-separable tab method has been widely adopted as an easy-to-open lid for cans of beverages such as beer, juice, and coffee, in which the can can be opened without separating the tab (including the torn portion) from the can lid. This type of tab non-separation method can be said to be a superior can opening method compared to the conventional tab separation method in that it prevents environmental contamination or unexpected injury due to scattering of removed tabs.
しかしながら、このタブ不分離型の缶蓋は、開缶に際し
て開缶力を要し開缶操作が容易でないため、裂断部を規
定するための弱め線の深さを深くする必要があり誤って
缶体を落下した場合に裂断部が破断し易く、更には弱め
線の深さ等の製造管理が繁雑で量産しにくい等の欠点が
あり、また缶蓋の素材としても、弱め線が切り裂き難い
ため安価なスチールを使用することができず、高価なア
ルミニウムを使用せざるを得ないとの材料選択面での制
約もある。However, this tab non-separable type can lid requires a force to open the can and is not easy to open, so it is necessary to increase the depth of the line of weakness to define the tearing part, which may cause accidental damage. If the can body is dropped, the torn part is likely to break, and furthermore, manufacturing control such as the depth of the line of weakness is complicated, making it difficult to mass-produce. There are also constraints in terms of material selection, as it is difficult to use inexpensive steel, and expensive aluminum must be used.
ここで、第4図は現在、電場に出回っているタブ不分離
方式のイージーオープン缶蓋を例示した平面図、第5図
は第4図におけるタブを除いた裂断部近傍の平面図を例
示したものである。Here, Fig. 4 is a plan view illustrating an easy-open can lid of the tab non-separation type that is currently on the market, and Fig. 5 is a plan view illustrating the vicinity of the torn part in Fig. 4, excluding the tab. This is what I did.
これらの図において、lは缶蓋、2はパネル、3はプレ
ス加工によって逆台形の如き断面形状でパネル面に設け
られた弱め線である。該弱め線3は該パネル2の中央部
近傍のA点およびD点を端部とするほぼ楕円形の裂断部
4を形成している。In these figures, 1 is a can lid, 2 is a panel, and 3 is a line of weakness provided on the panel surface with a cross-sectional shape like an inverted trapezoid by press working. The weakened line 3 forms a substantially elliptical tear portion 4 having ends at points A and D near the center of the panel 2.
また該パネル2の中央部近傍にはタブ5の固着部8が設
けられている。なお9はタブ5に設けられた舌状切り込
み線で、10は裂断部4に剛性を附与するための補強用
ビードである。Further, near the center of the panel 2, a fixing portion 8 for the tab 5 is provided. Note that 9 is a tongue-shaped cut line provided on the tab 5, and 10 is a reinforcing bead for imparting rigidity to the tear portion 4.
かかる缶蓋を開缶するには、先ずタブ5の後端把手部6
の下側に指を入れて押し上げ、固着部8を支点とするテ
コの作用でタブ先端部7を介して裂断部4を強く押圧し
てタブ固着部8に近接した弱め線3のB点近傍を破断し
、更に後端把手部6を押し上げることによって裂断部4
を押し下げて弱め線3を出発端部であるA点と缶蓋の周
縁部のC点近傍まで両方向に切り裂き、裂断部4を缶内
に折り下げる。この過程では弱め線3に導入されたクラ
ンクがタブ先端部からの最長離間点となるC点近傍で方
向を転換して周回せねばならないなめ、大きなりランク
伝播力を必要とする。したがって、クランクがC点近傍
を周回する
前にタブ先端部7に接する裂断部4が缶内に局部的に折
り込まれてその後の開缶が不能となったり、またタブ5
が固着部8近傍で折れ曲ってしまったり、更には固着部
8からタブ5が外れたりする等種々のトラブルを生ずる
。To open such a can lid, first the rear end handle 6 of the tab 5 is opened.
Insert your finger under the tab and push it up, and use a lever with the fixed part 8 as a fulcrum to strongly press the torn part 4 through the tab tip 7 to point B on the line of weakness 3 near the tab fixed part 8. By breaking the vicinity and further pushing up the rear end handle part 6, the torn part 4 is removed.
is pressed down and the weakened line 3 is torn in both directions from point A, which is the starting end, to point C, which is the peripheral edge of the can lid, and the torn part 4 is folded down into the can. In this process, the crank introduced into the line of weakness 3 must change direction and rotate around point C, which is the longest distance from the tip of the tab, and therefore requires a large rank propagation force. Therefore, before the crank rotates around the vicinity of point C, the torn part 4 in contact with the tab tip 7 is locally folded into the can, making it impossible to open the can afterwards, or the tab 5
Various troubles may occur, such as the tab 5 being bent near the fixed portion 8, or the tab 5 coming off from the fixed portion 8.
こうした欠点を改善するための従来技術としては、例え
ば米国特許第4.205.760号明細書、あるいは特
開昭58−64945号公報などの提案がある。Conventional techniques for improving these drawbacks include proposals such as U.S. Pat.
前者は第6図〜第8図に示すように、タブ先端部をタブ
弱め線11およびタブ切断線12で規定された内側先端
部13および突端部14からなる二段構造とし、タブ5
の後端把手部6を押し上げる開缶操作において、タブ固
着部8近傍の弱め線3と類似の形状を有するタブの内側
先端部13において弱め線3を破断し、次いで裂断部4
上に太き(突き出た突端部14によって弱め線3を漸次
裂断する。上記突端部14には、開口部4を缶内に折り
曲げた後にタブ5を元の位置に戻しても突端部14が内
側先端部13と一体となって戻ることなく、つまり缶内
容物を飲食する際に邪魔にならないようパネル部2にほ
ぼ垂直な状態に留め置くためにノツチ15が設けられて
いる。この場合タブ先端部の二段構造を規定するための
タブ弱め線11部分は、開缶初期においては曲げ変形を
生じて内側先端部13のみを缶内に押し込みタブ固着部
8近傍の弱め線を破断し、弱め線3を順次破断する開缶
中期においては、突端部14によって裂断部4にC点近
傍の弱め線3を引き裂くための押圧力を有効に作用させ
、なお且つタブ5を元の位置に戻す際には曲げ変形を生
じてタブの突端部14を缶内に留めるというきわどい役
割を担わなければならない。したがって、突端部14を
裂断部4上に大きく張り出すことによって従来技術の問
題点を解決せんとする提案の趣旨は明白であっても、タ
ブ弱め線11の深さ等の最適条件の幅が極めて小さく、
量産化が困難であるのみならず、初期開缶時においてタ
ブ弱め線11部分の曲げ変形に大きな力を要し、開缶が
不可能となったり、逆にこの部位で破断し突端部14が
缶内に混入す・る等の恐れもある。In the former case, as shown in FIGS. 6 to 8, the tab tip part has a two-stage structure consisting of an inner tip part 13 and a tip part 14 defined by the tab weakening line 11 and the tab cutting line 12, and the tab 5
In the can opening operation of pushing up the rear end handle 6, the line of weakness 3 is broken at the inner tip 13 of the tab, which has a similar shape to the line of weakness 3 near the tab fixing part 8, and then the line of weakness 3 is broken at the tearing part 4.
The line of weakness 3 is gradually torn by the upwardly thick (protruding tip 14). A notch 15 is provided in order to keep the can in a substantially perpendicular state to the panel portion 2 so that the can does not return together with the inner tip portion 13, that is, does not get in the way when eating or drinking the contents of the can. The tab weakening line 11 portion, which defines the two-stage structure of the tab tip, bends and deforms when the can is initially opened, pushing only the inner tip 13 into the can and breaking the weakening line near the tab fixing part 8. , in the middle stage of opening the can when the lines of weakness 3 are successively broken, the protruding end 14 effectively applies a pressing force to tear the line of weakness 3 near point C on the tearing part 4, and the tab 5 is returned to its original position. When the tab is returned to its original position, it must take on the critical role of causing bending deformation and retaining the tip end 14 of the tab within the can.Therefore, by overhanging the tip end 14 over the tear portion 4, the problem of the prior art is overcome. Although the purpose of the proposal to solve the problem is clear, the range of optimal conditions such as the depth of the tab weakening line 11 is extremely small.
Not only is mass production difficult, but a large amount of force is required to bend and deform the tab weakening line 11 when initially opening the can, making it impossible to open the can, or conversely causing the can to break at this location and the protruding end 14 to be damaged. There is also a risk of it getting mixed into the can.
後者の特開昭58−64945号公報による提案の骨子
は第9図および第10図に示すようにタブ固着部8を裂
断部4内に設けることにある。つまり、タブ5を引き上
げることによって裂断部4を押し下げるのではなく逆に
引張り上げ、順次弱め線3を切り裂き開缶する方式で、
開缶後の裂断部4およびタブ5はパネル面上に反転した
状態に置かれる。The gist of the latter proposal in Japanese Patent Application Laid-Open No. 58-64945 is to provide a tab fixing portion 8 within the tearing portion 4, as shown in FIGS. 9 and 10. In other words, by pulling up the tab 5, the tearing part 4 is pulled up instead of being pushed down, and the weakened line 3 is sequentially torn to open the can.
After the can is opened, the torn part 4 and the tab 5 are placed in an inverted state on the panel surface.
即ち、上述の提案は、タブ固着部8を裂断部内に設ける
という発想の転換を図った全く新しい開倍力式で、従来
のタブ不分離型缶蓋における裂断部4の缶内への局部的
な折れ曲がりによるI…缶操作の継続不能、あるいはタ
ブ5の腰折れ等の問題が解消されるが、反面、飲み口の
あるパネル面上に鋭利な端部を有する裂断部が現われる
という大きな欠点も併わせ持つ。In other words, the above-mentioned proposal is a completely new expansion force type that aims to change the idea of providing the tab fixing part 8 inside the tearing part, and it is a completely new expansion force type that aims to change the idea of providing the tab fixing part 8 inside the tearing part, and it is a completely new expansion force type that aims to change the idea of providing the tab fixing part 8 inside the tearing part. Problems such as the inability to continue operating the can or the bending of the tab 5 due to local bending are solved, but on the other hand, a large tear with a sharp edge appears on the panel surface where the drinking spout is located. It also has shortcomings.
上述の如く、タブ不分離型容易開放缶蓋において、取り
扱い時の安全性が高く、また開缶も容易で材料の選択上
の制約も受けず、かつ実施が容易な合理的な改善策は未
だ提案されていない。As mentioned above, there is still no rational improvement measure for tab non-separable type easy-open can lids that is safe to handle, easy to open, not subject to restrictions on material selection, and easy to implement. Not proposed.
本発明はかかる問題点を解決するものであり、とくにタ
ブ不分離型イージーオープン缶蓋における開缶性に関す
る問題の解決策を提示することを目的とする。The present invention is intended to solve these problems, and in particular, it is an object of the present invention to present a solution to the problem regarding the openability of a tab non-separable type easy-open can lid.
本発明者はこれらの問題を解決する方策として、開缶の
際の裂断部4の曲げ変形状態について詳細に検討し、中
期開缶過程において弱め線3に開缶力を有効に集中する
ための裂断部4への効果的な剛性附与手段を見い出し、
本発明を構成するに至った。As a measure to solve these problems, the present inventor has studied in detail the bending deformation state of the tearing part 4 during can opening, and has developed a method for effectively concentrating the can opening force on the line of weakness 3 during the intermediate can opening process. found an effective means of imparting rigidity to the ruptured portion 4,
The present invention has now been constructed.
即ち、本発明は、缶蓋パネル部の中央部近くから周辺部
にわたって略楕円形の形状で、且つ、缶蓋の中央部近く
にヒンジ部を形成するための非連続部を設は該楕円形の
長軸線が缶蓋の半径方向となるように配置した弱め線で
規定された裂断部、および該裂断部外にあって該弱め線
の非連続部近傍のパネル部に該裂断部の押し下げ用タブ
を固着したタブ不分離型イージーオープン缶蓋において
、該長軸線上の缶蓋パネル部の周辺部近くの弱め線の曲
率の中心点とタブ固着部に近接したヒンジ部の首部中心
点とを結ぶ直線に対して80°〜100’の傾斜角を有
する1個もしくは複数個の凹条もしくは凸条を裂断部内
に設けることを特徴とするタブ不分離型容易開放缶蓋を
提供するものである。That is, the present invention has an approximately elliptical shape extending from near the center to the periphery of the can lid panel portion, and a discontinuous portion for forming a hinge portion near the center of the can lid. A tear defined by a line of weakness arranged so that the long axis of the can lid is in the radial direction of the can lid, and a tear defined by a line of weakness located outside the tear and near a discontinuous part of the line of weakness. In a tab non-separable type easy-open can lid to which a push-down tab is fixed, the center point of the curvature of the line of weakness near the periphery of the can lid panel on the long axis and the center of the neck of the hinge part near the tab fixed part To provide a tab non-separable type easy-open can lid, characterized in that one or more grooves or protrusions having an inclination angle of 80° to 100' with respect to the straight line connecting the points are provided in the tearing part. It is something to do.
本発明者はかかる缶蓋を開発するために、本発明が対象
とする缶蓋にこれまで使用されたことのなかったスチー
ルを素材としてこの種の缶蓋を試作し、開缶時の裂断部
の曲げ変形状態と弱め線の破断形態との関係について種
々検討した。In order to develop such a can lid, the present inventor prototyped this type of can lid using steel, which has never been used for can lids that are the object of the present invention. Various studies were conducted on the relationship between the bending deformation state of the part and the fracture form of the line of weakness.
この結果、第4図に例示する従来の缶蓋ではタブ5の後
端把手部6を引き起こす開缶操作において弱め線3に導
入されたクランクが0点(第5図)近傍を周回する前に
切り裂かれた側の裂断部が缶内に折れ込むために、タブ
5が開缶終了位置つまりパネル面2にほぼ垂直となる位
置まで移動してしまい、引き続く開缶操作が不可能とな
ることが分った。即ち、第11図は缶胴16に取り付け
た従来デザインによるスチール製の缶M1 (第4図参
照)の開缶途中の状態を説明するための外観斜視図であ
る。同図において、タブ5は開缶終了位置近くまで引き
起されているにも関わらず弱め線3は0点の手前までし
か引き裂かれていないことが概観される。この理由は前
述の如く、弱め線3が引き裂かれて領域内における裂断
部4が局部的に缶内に折り込まれること、更に開缶力の
作用点となるタブ先端部7と接する裂断部4のP点近傍
が座屈すること等のため、クラックが0点を周回する前
に円周移動するタブ先端部7が結果的に裂断部4上の有
効な作用点を失なってしまうことにある。As a result, in the conventional can lid illustrated in FIG. 4, in the can opening operation that causes the rear end handle 6 of the tab 5, the crank introduced into the line of weakness 3 rotates around the 0 point (FIG. 5). Since the torn part on the torn side folds into the can, the tab 5 moves to the can opening end position, that is, the position almost perpendicular to the panel surface 2, and subsequent can opening operations become impossible. I understand. That is, FIG. 11 is an external perspective view for explaining a state in which a steel can M1 (see FIG. 4) of a conventional design attached to a can body 16 is being opened. In the figure, it can be seen that although the tab 5 has been pulled up close to the can opening end position, the line of weakness 3 has been torn only to a point just short of the 0 point. As mentioned above, the reason for this is that the line of weakness 3 is torn and the torn part 4 in the area is locally folded into the can, and furthermore, the torn part 4 in contact with the tab tip 7, which is the point of action of the can-opening force. Due to buckling in the vicinity of point P of 4, the tab tip 7, which moves circumferentially before the crack goes around the 0 point, ends up losing its effective point of action on the rupture part 4. It is in.
このように、タブ先端部7が有効な作用点を作り難くな
る現象はタブ固着部8を裂断部4の外部パネル面2に設
ける、つまり第4図に例示するような裂断部4を缶内に
折り込む開缶方式による缶蓋に特有の問題であって、第
9図に例示の如きタブ固着部8を裂断部4内に設けてタ
ブ5を引き上げながら直接的に裂断部4を引き裂き上げ
る開缶方式による缶蓋と基本的に異なる点と言える。In this way, the phenomenon in which it becomes difficult for the tab tip 7 to create an effective point of action can be solved by providing the tab fixing part 8 on the external panel surface 2 of the tearing part 4, that is, by providing the tearing part 4 as shown in FIG. This is a problem peculiar to can lids that are opened by folding them into the can, and a tab fixing part 8 as shown in FIG. It can be said that this is fundamentally different from the can lid which is opened by tearing up the lid.
そこで、本発明者は裂断部4上にタブ先端部7が有効な
作用点を持続的に確保することが可能で、且つ弱め線3
に開缶力を集中し易くするための裂断部4への効果的な
剛性附与手段について種々検討し、上記のような開缶性
を改善した新規な缶蓋デザインを開発するに至ったもの
である。なお、従来の技術で本発明の目的としている課
題が解決されないのは缶蓋素材として剛性の高いアルミ
ニラムの使用を前提としていたことにあり、弱め線3へ
の応力集中による開缶性の改善策が主眼となっていたこ
とにある。したがって、裂断部の曲げ変形に対する配慮
が不充分でスチールを素材とした場合には、不適当なU
字形の凸条もしくは凹条が好ましいデザインとして多用
されてきた。Therefore, the inventor of the present invention has made it possible to continuously secure an effective point of action of the tab tip 7 on the tearing part 4, and to
We conducted various studies on effective means of imparting rigidity to the tearing part 4 to make it easier to concentrate the can opening force on the can opening, and developed a new can lid design that improves can opening performance as described above. It is something. The problem that the present invention aims at cannot be solved with the conventional technology is that it is based on the use of highly rigid aluminum ram as the can lid material. was the main focus. Therefore, if insufficient consideration is given to the bending deformation of the fractured part and steel is used as the material, inappropriate U
Convex or concave lines in the shape of letters have been frequently used as a preferred design.
以下、本発明を図面に基いて詳細に説明する。Hereinafter, the present invention will be explained in detail based on the drawings.
第1図は本発明による缶蓋の一実施態様を示す平面図、
第2図は第1図における裂断部近傍の平面図、第3図は
、第2図のI−I線部の拡大断面図である。FIG. 1 is a plan view showing an embodiment of the can lid according to the present invention;
2 is a plan view of the vicinity of the rupture portion in FIG. 1, and FIG. 3 is an enlarged cross-sectional view taken along the line II in FIG. 2.
これらの図において、■は缶蓋、2はパネル部、3は弱
め線、4は裂断部、5はタブ、6はタブの後端把手部、
7はタブの先端部、8はタブの固着部、9は舌状切り込
み、10は凹条もしくは凸条である。タブ5は弱め線3
の不連続部に近接した裂断部4の外側のパネル部にリベ
ット加工あるいは接着等の方法によって固着される。In these figures, ■ is the can lid, 2 is the panel part, 3 is the weakened line, 4 is the torn part, 5 is the tab, 6 is the rear end handle of the tab,
7 is a tip of the tab, 8 is a fixed portion of the tab, 9 is a tongue-shaped cut, and 10 is a concave or convex line. Tab 5 is weak line 3
It is fixed to the outer panel part of the tearing part 4 near the discontinuous part by a method such as riveting or gluing.
このように構成された缶蓋において、本発明はC点近傍
の弱め線3の曲率の中心点(以下0点とする)とヒンジ
部の首部つまり最もくびれた部分■の中心点(以下0′
点とする)を結ぶ直線、Ii線、に対して80°〜10
0°の傾斜角、θ、を有する1個もしくは複数個の凹条
もしくは凸条10を裂断部4内に設けるものである。In the can lid constructed in this manner, the present invention is characterized by the center point of the curvature of the line of weakness 3 near point C (hereinafter referred to as 0 point) and the center point of the neck of the hinge, that is, the most constricted part (hereinafter referred to as 0').
80° to 10 to the line Ii, which connects the points
One or more grooves or protrusions 10 having an inclination angle θ of 0° are provided in the tearing portion 4.
このような凹条もしくは凸条を前記0′点と前記0点と
を結ぶ直線、I−1線、に対して80°〜100°の傾
斜角、θ、をなして設けることは本発明の重要な構成要
件であり、その主要な目的は、タブの先端部7で裂断部
4を押し下げて弱め線3を切り裂く開缶過程において、
裂断部4が1−■線部を尾根として缶内に折り込ポれる
のを効果的に抑制することによってC点近傍の弱め線を
裂断し易くすることにある。これらの凹条もしくは凸条
を1−1線から左回りに測った傾斜角θが80゜未満あ
るいは100“超、即ち、直角から大きく外れた場合に
は裂断部の曲げ変形の抑制効果が減退するか、あるいは
凹条等の両端部近傍での弱め線3への応力集中効果が小
さくなり、満足な開缶性改善効果が得難くなる。このよ
うな理由によって本発明においては傾斜角θを80”〜
100”に特定するものである。It is a feature of the present invention that such grooved or convex stripes are provided at an inclination angle, θ, of 80° to 100° with respect to the straight line connecting the 0' point and the 0 point, line I-1. This is an important component and its main purpose is to push down the tearing part 4 with the tip 7 of the tab and tearing the line of weakness 3 in the can opening process.
The purpose is to make it easier to tear the line of weakness near point C by effectively suppressing the tearing part 4 from folding into the can using the 1-■ line part as a ridge. If the inclination angle θ of these grooves or protrusions measured counterclockwise from the 1-1 line is less than 80° or more than 100", that is, if it deviates significantly from the right angle, the effect of suppressing the bending deformation of the torn part will be reduced. Otherwise, the effect of stress concentration on the line of weakness 3 near both ends of the groove etc. becomes smaller, making it difficult to obtain a satisfactory can-openability improvement effect.For these reasons, in the present invention, the inclination angle θ 80”~
100”.
尚、これらの四条もしくは凸条は前記の如く裂断部4の
曲げ変形を抑制し、且つ弱め線への応力集中を図り易く
する目的で設けるものであるから、缶外面側に凸形ある
いは缶内面側に凸形1、つまり外面側からは凹形、のい
ずれの形状で設けても良く、また、断面形状は第3図に
示す略円弧形に限られるものでなく■字形、U字形、逆
台形等いずれの形状でも差し支えない。These four stripes or convex stripes are provided for the purpose of suppressing the bending deformation of the tear portion 4 as described above and making it easier to concentrate stress on the line of weakness. It may be provided in either a convex shape 1 on the inner surface side, that is, a concave shape from the outer surface side, and the cross-sectional shape is not limited to the approximately arc shape shown in FIG. , an inverted trapezoid, or any other shape is acceptable.
また、これら凹条等の長さ、本数および間隔は適宜変更
できるものであるが、長さは凹条等の両端に位置する弱
め線3の間隔の少なくとも273以上としてできるだけ
その両端を弱め線3に近接させることが開缶力を弱め線
に集中するうえで望ましい。In addition, the length, number, and spacing of these grooves can be changed as appropriate, but the length should be at least 273 or more than the distance between the weakened lines 3 located at both ends of the grooved lines, etc., and the length should be at least 273 or more than the distance between the weakened lines 3 located at both ends of the groove It is desirable to have the can opening force close to the line of weakness in order to concentrate it on the line of weakness.
以上、本発明によればタブの先端部7で裂断部4を押し
下げて弱め線3を引き裂く開缶過程において、裂断部4
が局部的に缶内に折り込まれてその後の開缶操作が不能
となることがなく、また弱め、vI3に開缶力が集中し
易くなるため開缶操作がスムーズとなり開缶力も低減で
きる。As described above, according to the present invention, in the can opening process of pushing down the tearing part 4 with the tip 7 of the tab and tearing the line of weakness 3, the tearing part 4
is not locally folded into the can, making subsequent can opening operations impossible, and is weakened, making it easier to concentrate the can opening force on vI3, making the can opening operation smoother and reducing the can opening force.
第1図は本発明の実施態様を例示する缶蓋の平面図、第
2図は第1図の裂断部近傍の平面図、第3図は第2図の
I−1線部分の拡大断面図、第4図は従来の缶蓋を例示
した平面図、第5図は第4図の裂断部近傍の平面図、第
6図は他の従来技術の缶蓋を例示した斜視図、第7図は
第6図の弱め線部分の拡大平面図、第8図は第6図の缶
蓋の開缶後のタブ先端部分の拡大側面図、第9図は他の
従来技術の缶蓋を例示した平面図、第10図は第9図の
裂断部近傍の平面図、第11図は第4図の缶蓋の開缶途
中の状態を説明するための外観斜視図である。
1・・・缶蓋、 2・・・パネル、3・・
・弱め線、 4・・・裂断部、5・・・タブ、
6・・・タブの後端把手部、7・・・タ
ブの先端部、 8・・・タブの固着部、9・・・舌状
切り込み、
10・・・凹条もしくは凸条、
11・・・タブの弱め線、 12・・・切断部、13
・・・タブの内側先端部、
14・・・タブの突端部、 15・・・ノツチ、16
・・・缶胴。Fig. 1 is a plan view of a can lid illustrating an embodiment of the present invention, Fig. 2 is a plan view of the vicinity of the tearing part in Fig. 1, and Fig. 3 is an enlarged cross section taken along line I-1 in Fig. 2. 4 is a plan view illustrating a conventional can lid, FIG. 5 is a plan view near the tearing part in FIG. 4, and FIG. Fig. 7 is an enlarged plan view of the weakened line in Fig. 6, Fig. 8 is an enlarged side view of the tab tip of the can lid of Fig. 6 after opening, and Fig. 9 is an enlarged side view of the can lid of another prior art. The illustrated plan view, FIG. 10 is a plan view of the vicinity of the tearing part in FIG. 9, and FIG. 11 is an external perspective view for explaining the state of the can lid in FIG. 4 during opening. 1...can lid, 2...panel, 3...
・Weak line, 4...Tear part, 5...Tab,
6... Rear end handle portion of the tab, 7... Tip portion of the tab, 8... Fixed portion of the tab, 9... Tongue-shaped cut, 10... Concave or convex line, 11...・Tab weakening line, 12...cutting part, 13
... Inner tip of the tab, 14... Pronged end of the tab, 15... Notch, 16
...Can body.
Claims (1)
形の形状で、且つ缶蓋の中央部近くにヒンジ部を形成す
るための非連続部を設け、該楕円形の長軸線を缶蓋の半
径方向に配した弱め線で規定された裂断部、および該裂
断部外にあって該弱め線の非連続部近傍のパネル部に該
裂断部の押し下げ用タブを固着したタブ不分離型イージ
ーオープン缶蓋において、 該長軸線上の缶蓋パネル部の周辺部近くの弱め線の曲率
の中心点とタブ固着部に近接したヒンジ部の首部中心点
とを結ぶ直線に対して80°〜100°の傾斜角を有す
る1個もしくは複数個の凹条もしくは凸条を裂断部内に
設けることを特徴とするタブ不分離型容易開放缶蓋。[Claims] The can lid panel has a substantially elliptical shape extending from near the center to the periphery, and a discontinuous portion for forming a hinge portion is provided near the center of the can lid, and the elliptical shape is A tear defined by a line of weakness with its long axis oriented in the radial direction of the can lid, and a tab for pushing down the tear on a panel portion outside the tear and near a discontinuous portion of the line of weakness. In the tab non-separable easy-open can lid to which the tab is fixed, connect the center point of the curvature of the line of weakness near the periphery of the can lid panel on the long axis and the center point of the neck of the hinge part close to the tab fixed part. A tab non-separable type easy-open can lid characterized in that one or more grooves or protrusions having an inclination angle of 80° to 100° with respect to a straight line are provided in the tear portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12601788A JPH01308744A (en) | 1988-05-25 | 1988-05-25 | Easily opening can lid with inseparable tab |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12601788A JPH01308744A (en) | 1988-05-25 | 1988-05-25 | Easily opening can lid with inseparable tab |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01308744A true JPH01308744A (en) | 1989-12-13 |
Family
ID=14924662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12601788A Pending JPH01308744A (en) | 1988-05-25 | 1988-05-25 | Easily opening can lid with inseparable tab |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01308744A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0532255A (en) * | 1991-05-02 | 1993-02-09 | Hokkai Can Co Ltd | Easily openable can lid |
JPH0522398U (en) * | 1991-08-02 | 1993-03-23 | 三菱マテリアル株式会社 | Can lid |
US6024239A (en) * | 1997-07-03 | 2000-02-15 | American National Can Company | End closure with improved openability |
US6129230A (en) * | 1998-12-18 | 2000-10-10 | American National Can Company | End closure with improved non-detachable opening panel |
US6761281B2 (en) | 2002-11-26 | 2004-07-13 | Rexam Beverage Can Company | Modified score for smooth openability |
-
1988
- 1988-05-25 JP JP12601788A patent/JPH01308744A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0532255A (en) * | 1991-05-02 | 1993-02-09 | Hokkai Can Co Ltd | Easily openable can lid |
JPH0522398U (en) * | 1991-08-02 | 1993-03-23 | 三菱マテリアル株式会社 | Can lid |
US6024239A (en) * | 1997-07-03 | 2000-02-15 | American National Can Company | End closure with improved openability |
US6129230A (en) * | 1998-12-18 | 2000-10-10 | American National Can Company | End closure with improved non-detachable opening panel |
US6260728B1 (en) | 1998-12-18 | 2001-07-17 | Rexam Beverage Can Company | End closure with improved non-detachable opening panel |
US6761281B2 (en) | 2002-11-26 | 2004-07-13 | Rexam Beverage Can Company | Modified score for smooth openability |
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