JP2003136168A - Can lid - Google Patents
Can lidInfo
- Publication number
- JP2003136168A JP2003136168A JP2001334547A JP2001334547A JP2003136168A JP 2003136168 A JP2003136168 A JP 2003136168A JP 2001334547 A JP2001334547 A JP 2001334547A JP 2001334547 A JP2001334547 A JP 2001334547A JP 2003136168 A JP2003136168 A JP 2003136168A
- Authority
- JP
- Japan
- Prior art keywords
- lid
- seaming
- winding
- chuck wall
- wall
- 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
- 238000004826 seaming Methods 0.000 claims abstract description 59
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 description 70
- 239000000463 material Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Rigid Containers With Two Or More Constituent Elements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、缶蓋、特に缶蓋材
料の節約を図った缶蓋に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can lid, and more particularly to a can lid in which can lid material is saved.
【０００２】[0002]
【従来の技術】材料コスト低減の見地から、蓋材の使用
材料を最大限に低減させることが製罐メーカーにとって
重要な技術的課題となっており、以前から種々の方法が
提案されている。蓋材の低減を図るには、蓋の構成から
みれば、蓋材の薄肉化、及び蓋材表面積の縮小化が考え
られるが、これらの方策は当然缶内の陽圧又は負圧に対
する耐圧性（耐変形性）及び容器の密封性が確保でき、
しかも巻締作業性や使用勝手性が良い等の条件を満たさ
なければならない。2. Description of the Related Art From the viewpoint of material cost reduction, it has been an important technical issue for a can manufacturer to minimize the amount of material used for a lid material, and various methods have been proposed. In order to reduce the lid material, from the viewpoint of the lid structure, it is possible to make the lid material thinner and reduce the surface area of the lid material, but these measures are naturally resistant to positive pressure or negative pressure in the can. (Deformation resistance) and container tightness can be secured,
Moreover, it is necessary to satisfy the conditions such as workability for winding and good usability.
【０００３】従来、耐圧性を向上させて蓋材の薄肉化を
図る手段として、チャックウォールとパネル面との間に
強化環状溝を形成することが提案されている（例えば、
特開平３−２７５４４３号公報、実用新案登録第２５４
４２号公報等）。さらに、耐圧性を維持しつつ蓋材の表
面積を小さくして蓋材の節約を図る手段として、チャッ
クウォールを中央パネルとの間で２０°〜７０°の角度
で傾斜させたもの（実開昭５７−１１７３２３号公
報）、又は３０°〜６０°の角度で傾斜させ、強化環状
溝の直径を小さくするようにしたものが提案されている
（特表平１１−５０５７９１号公報）。図６は３０°〜
６０°の角度で傾斜させた従来例の缶蓋の要部断面を示
し、図７は該缶蓋を缶胴に二重巻締する際の１次巻終了
後の巻締状態を示す要部断面図であり、図８は巻締完了
後の巻締部断面を示している。Conventionally, as a means for improving the pressure resistance and reducing the thickness of the lid member, it has been proposed to form a reinforced annular groove between the chuck wall and the panel surface (for example,
JP-A-3-275443, Utility model registration No. 254
42, etc.). Furthermore, as a means for reducing the surface area of the lid material while maintaining the pressure resistance and saving the lid material, the chuck wall is inclined at an angle of 20 ° to 70 ° with respect to the central panel. No. 57-117323) or a structure in which the diameter of the reinforced annular groove is reduced by inclining at an angle of 30 ° to 60 ° (Japanese Patent Publication No. 11-505791). 6 ° to 30 °
FIG. 7 is a cross-sectional view of a main part of a conventional can lid tilted at an angle of 60 °, and FIG. 7 is a main part showing a winding state after completion of primary winding when the can lid is double-wound around the can body. FIG. 8 is a cross-sectional view, and FIG. 8 shows a cross section of the winding portion after the winding is completed.
【０００４】[0004]
【発明が解決しようとする課題】図６に示す缶蓋４０の
ようにチャックウォール４１の傾斜角を大きくして強化
環状溝４２の直径を小さくすることは、中央パネル面の
面積を小さくさせることができ、蓋材節約に有効である
が、缶胴との巻締性、密封性の点で次のような問題点が
ある。
蓋のチャックウォール４１とシーミングチャック４５
との係合は、図７に示すように、チャックウォール４１
と略同傾斜角度に形成された傾斜面４６と軸方向にほぼ
垂直な略垂直面４７とで行われるが、巻締時の缶蓋の回
転を防止するのは傾斜面４６の接触抵抗であるので、十
分な接触抵抗が得られず、スリップして巻締不良を起こ
し易く、且つチャックウォール面を傷つけたりする恐れ
がある。
図７に示すように、巻締時のシーミングチャックとシ
ーミングロールとの隙間角θが従来の缶蓋の場合と比べ
て大きいので、巻締時のバックアップが十分でなく、特
に図７に示すように１次巻締終了まではシーミングチャ
ックによるバックアップがないので、緊密な巻締ができ
ず、巻締終了後シーミングロールとシーミングチャック
係合が解かれると、巻締部がスプリングバックにより緩
み、図８に５０、５１で示すように、巻締部に隙間がで
き易い。そのため、この隙間が内容液の漏洩経路となり
漏れが生じたり、また缶胴のフランジ端縁の金属露出部
に内容液が接触し、そこから腐食が生じるなどの恐れが
ある。Increasing the inclination angle of the chuck wall 41 and decreasing the diameter of the reinforcing annular groove 42 as in the can lid 40 shown in FIG. 6 reduces the area of the central panel surface. Although it is possible to save the lid material, there are the following problems in terms of the tightness of the winding and the sealing property with the can body. Chuck wall 41 of lid and seaming chuck 45
The engagement with the chuck wall 41 is as shown in FIG.
The contact resistance of the inclined surface 46 prevents the can lid from rotating during winding. Therefore, a sufficient contact resistance cannot be obtained, slipping is likely to occur, and winding failure may occur, and the chuck wall surface may be damaged. As shown in FIG. 7, since the gap angle θ between the seaming chuck and the seaming roll at the time of winding is larger than that of the conventional can lid, the backup at the time of winding is not sufficient. As shown in the figure, since there is no backup by the seaming chuck until the end of the primary winding, tight winding cannot be performed. It becomes loose due to the back, and as shown by 50 and 51 in FIG. Therefore, there is a risk that this gap serves as a leakage path for the content liquid, causing leakage, or that the content liquid comes into contact with the metal exposed portion of the flange edge of the can body and causes corrosion.
【０００５】そこで、本発明は、チャックウォールの傾
斜角を大きくして、強化環状溝の直径を小さくしてセン
ターパネル面を小さくした缶蓋において、巻締時に缶蓋
とチャックウォールとのスリップが生じないでシーミン
グウォールに損傷を与えることがなく、且つシーミング
ロールに対する十分なバックアップができて巻締終了後
の巻締部のスプリングバックが少なく、強固に巻締する
ことができる缶蓋を提供することを目的とする。Therefore, according to the present invention, in the can lid in which the angle of the chuck wall is made large and the diameter of the reinforcing annular groove is made small so that the center panel surface is made small, a slip between the can lid and the chuck wall occurs at the time of winding. A can lid that does not cause damage to the seaming wall without being generated, and that can sufficiently back up to the seaming roll and has little springback of the winding portion after the winding is completed, and can firmly wind. The purpose is to provide.
【０００６】[0006]
【課題を解決するための手段】本発明者は、上記課題を
解決するために種々研究した結果、耐圧性を増すために
シーミングチャックを緩傾斜した缶蓋において、シーミ
ングチャックと缶蓋の滑りが生じやすい原因は、シーミ
ングチャックウォールを緩傾斜した缶蓋用のシーミング
チャックが、シーミングウォールが急傾斜である通常の
缶蓋を巻締するものと形状が相違していることによる缶
蓋との接触抵抗の低下にあり、また巻締が緩くなる原因
は、１次巻締完了時までシーミングチャックによるバッ
クアップがないために、十分な１次巻締が得られにく
く、２次巻締でシーミングチャックのバックアップで所
定形状の巻締が得られても、１次巻締が十分でないた
め、２次巻締ロールが離れると巻締部がスプリングバッ
クして緩くなることにあることが判明した。そして、さ
らに研究した結果、これらの問題点は缶蓋のシーミング
チャックウォールの形状を工夫することによって、解消
することができることを知見し、本発明に到達したもの
である。As a result of various studies to solve the above problems, the present inventor has found that in a can lid in which the seaming chuck is gently inclined to increase the pressure resistance, the seaming chuck and the can lid are separated. The reason why slippage is likely to occur is that the seaming chuck for a can lid with a slightly inclined seaming chuck wall has a different shape from that of a normal can lid with a steeply inclined seaming wall. The reason for the decrease in contact resistance with the can lid and the loosening of the winding is that the primary winding is difficult to obtain because there is no backup by the seaming chuck until the completion of the primary winding. Even if the seaming chuck can be backed up to obtain a predetermined shape of winding, the primary winding is not sufficient, and if the secondary winding roll separates, the winding portion will spring back and become loose. Rukoto was found. As a result of further research, they have found that these problems can be solved by devising the shape of the seaming chuck wall of the can lid, and arrived at the present invention.
【０００７】即ち、上記課題を解決する本発明の缶蓋
は、センターパネル、強化環状溝、シーミングチャック
ウォール、及びカール部を有する缶蓋において、前記シ
ーミングチャックウォールは、前記カール部から続く急
傾斜部と前記強化環状溝の外周壁に続く緩傾斜部が連接
してなり、前記急傾斜部が垂直軸線に対して５°〜１５
°外側に急傾斜し、前記緩傾斜部が垂直軸線に対して３
０゜〜６０゜外側に緩傾斜していることを特徴とするも
のである。前記急傾斜部の垂直軸線に対する傾斜角が５
°よりも小さいとシーミングチャックの嵌合が困難であ
り、１５°よりも大きいと二重巻締時の巻締ロールに対
するバックアップ効果が得られず巻締がルーズになる。
また、緩傾斜部の傾斜角度は、３０°未満及び６０°以
上であると耐圧向上効果が少なくなり、望ましくは４０
〜５０°である。That is, the can lid of the present invention for solving the above problems is a can lid having a center panel, a reinforced annular groove, a seaming chuck wall, and a curl portion, wherein the seaming chuck wall continues from the curl portion. A steep slope and a gentle slope continuing from the outer peripheral wall of the reinforced annular groove are connected to each other, and the steep slope is 5 ° to 15 ° with respect to the vertical axis.
° Sloping outward, the gentle slope is 3 with respect to the vertical axis
It is characterized in that it is gently inclined outward from 0 ° to 60 °. The angle of inclination of the steep slope with respect to the vertical axis is 5
If the angle is less than °, it is difficult to fit the seaming chuck, and if the angle is more than 15 °, the backup effect for the winding roll at the time of double winding cannot be obtained and the winding becomes loose.
Further, when the inclination angle of the gentle inclination portion is less than 30 ° and 60 ° or more, the pressure resistance improving effect is reduced, and it is preferably 40
~ 50 °.
【０００８】上記課題を解決する本発明の他の缶蓋は、
前記缶蓋において、前記シーミングチャックウォール
が、前記急傾斜部と前記緩傾斜部との間に設けられた略
水平部を有することを特徴とするものである。シーミン
グチャックウォールの中間部に略水平部を設けることに
より、巻締中のスリップ防止効果が高まり、より緊密な
二重巻締が得られる。前記略水平部の環状水平幅は０．
５〜０．７５ｍｍであることが望ましい。Another can lid of the present invention for solving the above problems is
In the can lid, the seaming chuck wall has a substantially horizontal portion provided between the steeply inclined portion and the gently inclined portion. By providing a substantially horizontal portion in the middle portion of the seaming chuck wall, the slip prevention effect during winding is enhanced, and a tighter double winding can be obtained. The annular horizontal width of the substantially horizontal portion is 0.
It is desirable to be 5 to 0.75 mm.
【０００９】前記チャックウォールの急傾斜部と緩傾斜
部の連接位置、又は前記略水平部の位置は、前記カール
部頂面から２．５〜３．５ｍｍの深さ位置にあることが
望ましい。また、前記カール部頂面から前記強化環状溝
下面までの高さが、５．５〜７．５ｍｍの範囲であるこ
とが望ましい。さらに、前記強化環状溝の内面半径が
０．４５〜１．０ｍｍ、望ましくは０．４８〜０．５５
ｍｍの範囲望ましい。It is desirable that the connecting position of the steeply inclined portion and the gently inclined portion of the chuck wall, or the position of the substantially horizontal portion is at a depth position of 2.5 to 3.5 mm from the top surface of the curl portion. Further, the height from the top surface of the curl portion to the lower surface of the reinforcing annular groove is preferably in the range of 5.5 to 7.5 mm. Furthermore, the inner surface radius of the reinforced annular groove is 0.45 to 1.0 mm, preferably 0.48 to 0.55.
A range of mm is desirable.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施形態を図面に
基づき詳細に説明する。図１は本発明の実施形態に係る
缶蓋の要部断面を拡大して示している。本実施形態の缶
蓋１は、センターパネル２、強化環状溝３、シーミング
チャックウォール４、カール部５からなっている。前記
シーミングチャックウォール４は、全体としては緩傾斜
状であるが、中窪み状にアール屈曲部６でアール屈曲し
ており、カール部５から続く部分が垂直軸線に対して本
実施形態では傾斜角α＝１５°外側に急傾斜した急傾斜
部４ａと、垂直軸線に対して傾斜角β＝４５゜外側に緩
傾斜した緩傾斜部４ｂとからなり、緩傾斜部の下端が強
化環状溝３の外周壁３ａにアール屈曲部７を介して続い
ている。前記強化環状溝３の底部とカール部５の底面と
の距離、即ち缶蓋の高さｈ1は６．８５ｍｍであり、ア
ール屈曲部６は、カール部頂点からの垂直距離ｈ2は
３．０ｍｍの位置にある。そして、強化環状溝３は、断
面係数を大きくして機械的強度を高めるため、垂直で細
くて深い溝であることが望ましい。そのため、その深さ
ｈ3は２．３ｍｍであり、底部の曲率半径は０．５１ｍ
ｍであり、その外側側壁３ａ及び内側側壁３ｂは互いに
軸線に対して平行（即ち、垂直壁）であることが望まし
いが、側壁３ａは軸線に対して外側に０°〜２°、側壁
３ｂは軸線に対して内側に０°〜２°傾斜しても良い。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an enlarged view showing a cross section of a main part of a can lid according to an embodiment of the present invention. The can lid 1 of this embodiment includes a center panel 2, a reinforced annular groove 3, a seaming chuck wall 4, and a curl portion 5. The seaming chuck wall 4 has a gentle slope shape as a whole, but has a radius bend at a radius bend portion 6 in the form of a hollow, and a portion continuing from the curl portion 5 is inclined in the present embodiment with respect to the vertical axis. The angle α = 15 ° consists of a steeply inclined portion 4a that is steeply outward and a gentle inclination 4b that is gently inclined outward at an inclination angle β = 45 ° with respect to the vertical axis. To the outer peripheral wall 3a via a curved portion 7. The distance between the bottom of the reinforced annular groove 3 and the bottom of the curl portion 5, that is, the height h 1 of the can lid is 6.85 mm, and the radius bend portion 6 has a vertical distance h 2 from the apex of the curl portion 3. It is located at 0 mm. The reinforced annular groove 3 is preferably a vertical, thin and deep groove in order to increase the section modulus and increase the mechanical strength. Therefore, the depth h 3 is 2.3 mm, and the radius of curvature of the bottom is 0.51 m.
m, and the outer side wall 3a and the inner side wall 3b are preferably parallel to each other with respect to the axis (that is, vertical walls), but the side wall 3a is 0 ° to 2 ° outside the axis, and the side wall 3b is You may incline 0 degree-2 degrees with respect to an axis line.
【００１１】上記各寸法は、代表的な一例であり、傾斜
角αは５°〜１５°、傾斜角βは３０゜〜６０゜、缶蓋
の高さｈ1は５．５〜７．５ｍｍ、そして強化環状溝３
の深さｈ3は２〜３ｍｍの範囲をそれぞれが満たせば、
前記課題を解決することができる。そして、アール屈曲
部６は、カール部頂点からの垂直距離ｈ2は２．５〜３
ｍｍの範囲、缶蓋の高さｈ1に対してはその上部から約
３５〜５５％、望ましくは４０〜５０％の範囲内の位置
にあればよい。The above dimensions are typical examples. The inclination angle α is 5 ° to 15 °, the inclination angle β is 30 ° to 60 °, and the can lid height h 1 is 5.5 to 7.5 mm. , And reinforced annular groove 3
Depth h 3 of each is within the range of 2-3 mm,
The above problems can be solved. Further, the radius bend portion 6 has a vertical distance h 2 from the apex of the curl portion of 2.5 to 3
In the range of mm, for the height h 1 of the can lid, the position may be within the range of about 35 to 55%, preferably 40 to 50% from the upper part.
【００１２】上記缶蓋１を巻締するシーマーのシーミン
グチャック１０は、図２に示すように、缶蓋１のシーミ
ングチャックウォールの急傾斜部４ａに係合する略垂直
な急傾斜部作用面１１と、実質的にチャックウォールの
緩傾斜部４ｂと略同じ角度傾斜し、該緩傾斜部４ｂと係
合する緩傾斜部作用面１２を有し、両作用面の接合部１
３は半径ｒ＝０．５〜１．０ｍｍのアールとなってい
る。As shown in FIG. 2, the seaming seaming chuck 10 for winding the can lid 1 tightens a substantially vertical steep portion which engages with the steep portion 4a of the seaming chuck wall of the can lid 1. The surface 11 and the gently inclined portion working surface 12 that is inclined substantially at the same angle as the gently inclined portion 4b of the chuck wall and engages with the gently inclined portion 4b.
3 has a radius r of 0.5 to 1.0 mm.
【００１３】以上のように形成された缶蓋をシーマーで
巻締するには、缶蓋１のカール部５を缶胴１７のフラン
ジ１８に載せて缶蓋を被せた状態の缶体をリフター（図
示せず）に載置し、リフターが上昇することによって、
その上部に位置するシーミングチャック１０とで缶体を
所定のリフター圧で挟持し、缶体が自転及び公転して巻
締を開始する。第１次巻締開始時には、図２に示すよう
に、シーミングチャックの緩傾斜部作用面１２がチャッ
クウォールの緩傾斜部４ｂと圧接係合すると共に、接合
部１３が缶蓋のチャックウォールのアール屈曲部６と圧
接係合し、それらの圧接抵抗が第１次巻締ロール２５に
よる巻締加工抵抗に打ち勝つことにより、シーミングチ
ャック１０と缶蓋１の滑りがなく、良好に巻締ができ
る。特に、本発明の缶蓋形状によれば、シーミングチャ
ック１０が缶蓋１に嵌合した状態ではチャックウォール
の急傾斜部４ａとシーミングチャックの急傾斜部作用面
１１との屈曲部からの隙間傾斜角θが小さいので、屈曲
部６とシーミングチャックの接合部１３とが、巻締開始
時から広い接触面積で圧接することができ、その部分で
従来のものと比べて強い接触抵抗が得られ、第１巻締ロ
ールの接触開始時の強い抵抗に対しても缶蓋とシーミン
グチャックとのが滑りが生じることなく巻締することが
できる。In order to wind the can lid thus formed with a seamer, the curl portion 5 of the can lid 1 is placed on the flange 18 of the can body 17 and the can body is covered with the can lid. (Not shown), lifter lifts,
The can body is clamped by a predetermined lifter pressure with the seaming chuck 10 located above it, and the can body rotates and revolves to start winding. At the start of the primary winding, as shown in FIG. 2, the gently inclined portion working surface 12 of the seaming chuck is press-contacted with the gently inclined portion 4b of the chuck wall, and the joint portion 13 is the chuck wall of the can lid. Since the pressure contact engagement with the R-curved portion 6 and the pressure contact resistance thereof overcomes the resistance to the winding processing by the primary winding roll 25, the seaming chuck 10 and the can lid 1 do not slip and the winding can be performed well. it can. Particularly, according to the can lid shape of the present invention, when the seaming chuck 10 is fitted to the can lid 1, the steeply inclined portion 4a of the chuck wall and the steeply inclined portion working surface 11 of the seaming chuck are bent from a bent portion. Since the gap inclination angle θ is small, the bent portion 6 and the joint portion 13 of the seaming chuck can be pressed against each other with a wide contact area from the start of winding, and a stronger contact resistance than that of the conventional one can be obtained at that portion. The obtained can be wound without slipping between the can lid and the seaming chuck even with respect to the strong resistance at the start of contact of the first winding roll.
【００１４】第１次巻締巻締ロール２５による第１次巻
締が進行することにより、急傾斜部４ａが次第に軸心側
に立ち上がるので、屈曲部での接触抵抗が楔効果により
一層増大し、滑りが生じることなく、１次巻締が遂行す
る。そして、チャックウォールの急傾斜部４ａとシーミ
ングチャックの急傾斜部作用面１１との隙間傾斜角が小
さいので、１次巻締終了時には、図３に示すように、巻
締部のチャックウォール４がシーミングチャックの急傾
斜部作用面１１にバックアップされた状態になり、より
完全に所定形状に１次巻締することができる。As the primary winding by the winding roll 25 progresses, the steeply inclined portion 4a gradually rises to the axial center side, so that the contact resistance at the bent portion is further increased by the wedge effect. The primary winding is performed without slippage. Since the gap inclination angle between the steeply inclined portion 4a of the chuck wall and the steeply inclined portion working surface 11 of the seaming chuck is small, at the end of the primary winding, as shown in FIG. Is in a state of being backed up on the steeply inclined portion working surface 11 of the seaming chuck, and the primary winding can be completed more completely in a predetermined shape.
【００１５】そして、この状態から第２巻締ロールによ
る２次巻締が行われるので、２次巻締は巻締開始から巻
締部がシーミングチャックにバックアップされた状態で
行われる。その結果、より強い圧接力で巻締することが
でき、巻締部が強固に成形される。従って、巻締終了後
のスプリングバック量が少なく、図４に示すように、巻
締部が緩むことなく強固な巻締が達成できる。以上のよ
うに本実施形態によれば、巻締時のシーミングチャック
とチャックウォールの滑りを確実に防止することがで
き、且つ十分に巻締部をバックアップした状態で巻締す
ることができて強固な巻締部が得られるので、シーミン
グチャック部を緩傾斜させたこの種缶蓋の上記問題点を
解消することができた。From this state, the secondary winding is performed by the second winding roll, so the secondary winding is performed with the winding portion backed up by the seaming chuck from the start of the winding. As a result, it is possible to perform tightening with a stronger pressure contact force, and the wound part is firmly formed. Therefore, the amount of spring back after the completion of winding is small, and as shown in FIG. 4, a strong winding can be achieved without loosening the winding portion. As described above, according to the present embodiment, slippage between the seaming chuck and the chuck wall at the time of winding can be reliably prevented, and winding can be performed with the winding portion sufficiently backed up. Since a strong winding portion can be obtained, the above problems of this kind of can lid in which the seaming chuck portion is gently inclined can be solved.
【００１６】以上のように形成された缶蓋の最終的巻締
形態は、シーミングチャック全体を緩傾斜した場合と変
わらないので、このように構成された缶蓋は、センター
パネル２の面積が、チャックウォールの緩傾斜部の投影
面積分だけ小さくなり、受圧面積の減少によって、そこ
に作用する軸方向荷重が小さくなり、所定の耐圧性を確
保するに必要な肉厚を減少させることができる。しか
も、チャックウォールが傾斜している結果、センターパ
ネルに作用する軸方向荷重は、その全部がチャックウォ
ールにたわみ変形の原因となる横荷重として機能するの
でなく、一部分はチャックウォール（緩傾斜部）の軸荷
重として分散されるので、チャックウォールの緩傾斜部
の撓みも小さく、缶蓋全体としてバックリングに対して
大きな機械的強度を持つことになり、缶蓋の薄肉化を図
ることができる。しかも、センターパネルの面積も小さ
いから、その面からも蓋材の節約を図ることができる。
また、本発明では、環状強化溝３を外側垂直壁、内側垂
直壁で構成しその深さを深くし、底部の曲率半径を小さ
くしてあるので、この部分の機械的強度が向上するた
め、板厚をさらに薄くすることができる。The final winding form of the can lid formed as described above is the same as when the whole seaming chuck is tilted gently. Therefore, the can lid thus constructed has an area of the center panel 2. By reducing the projected area of the gently inclined portion of the chuck wall and reducing the pressure receiving area, the axial load acting on the chuck wall is reduced, and the wall thickness required to secure a predetermined pressure resistance can be reduced. . Moreover, as a result of the tilt of the chuck wall, the axial load acting on the center panel does not entirely function as a lateral load that causes flexural deformation of the chuck wall, but a part thereof does not function as a chuck wall (slowly inclined portion). Since it is distributed as the axial load of the chuck wall, the bending of the gently inclined portion of the chuck wall is small, and the entire can lid has a large mechanical strength against the buckling, so that the can lid can be made thin. Moreover, since the area of the center panel is small, it is possible to save the lid material from that aspect as well.
Further, in the present invention, since the annular reinforcing groove 3 is composed of the outer vertical wall and the inner vertical wall to make the depth deep and the radius of curvature of the bottom portion small, the mechanical strength of this portion is improved, The plate thickness can be further reduced.
【００１７】図５は、本発明の他の実施形態であり、前
記実施形態と同様な部分は同一引出符号を用いて説明を
省き、相違している部分のみ説明する。本実施形態の缶
蓋２０は、チャックウォールの形状を改善することによ
って前記実施形態のものよりもさらに確実にシーミング
チャックとチャックウォールの滑りを防止することがで
きるようにしたものである。本実施形態における缶蓋２
０のシーミングチャックウォール２１は、カール部５か
ら続く急傾斜部２１ａと前記強化環状溝の外周壁３ａに
続く緩傾斜部２１ｃとの間に略水平部２１ｂを設けたこ
とを特徴とするものである。前記急傾斜部が垂直軸線に
対して前記実施形態同様に５°〜１５°外側に急傾斜
し、前記緩傾斜部が垂直軸線に対して３０゜〜６０゜外
側に緩傾斜している。そして、前記略水平部の環状水平
幅ｓは０．５〜０．７５ｍｍの範囲が望ましく、本実施
形態で０．５ｍｍにした。また、急傾斜部２１ａと略水
平部２１ｂのアール屈曲部２２は半径ｒ＝０．５〜１．
０ｍｍのアールとなっているのが望ましく、本実施形態
ではｒ＝０．５ｍｍとした。FIG. 5 shows another embodiment of the present invention. The same parts as those in the above-mentioned embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described. The can lid 20 of the present embodiment is configured to improve the shape of the chuck wall so that slippage between the seaming chuck and the chuck wall can be prevented more reliably than in the above embodiments. Can lid 2 in the present embodiment
The seaming chuck wall 21 of No. 0 is characterized in that a substantially horizontal portion 21b is provided between the steeply inclined portion 21a continuing from the curl portion 5 and the gently inclined portion 21c continuing to the outer peripheral wall 3a of the reinforcing annular groove. Is. The steeply inclined portion is steeply inclined outwardly by 5 ° to 15 ° with respect to the vertical axis, and the gently inclined portion is gently inclined outwardly by 30 ° to 60 ° with respect to the vertical axis. The annular horizontal width s of the substantially horizontal portion is preferably in the range of 0.5 to 0.75 mm, and is 0.5 mm in this embodiment. Further, the radiused portions 22 of the steeply inclined portion 21a and the substantially horizontal portion 21b have a radius r = 0.5 to 1.
It is desirable that the radius is 0 mm, and in this embodiment, r = 0.5 mm.
【００１８】以上のように形成された缶蓋の巻締に使用
するシーマのシーミングチャック３０は、図５に示す形
状をし、缶蓋のシーミングチャックウォール２１の急傾
斜部２１ａに係合する略垂直な急傾斜部作用面３１、略
水平部２１ｂと同じく略水平面となっている略水平部作
用面３２、及び実質的にチャックウォールの緩傾斜部２
１ｃと略同じ角度傾斜し、該緩傾斜部２１ｃと係合する
緩傾斜部作用面３３を有し、急傾斜部作用面３１と略水
平部作用面３２の接合部３４は半径０．５〜１．０ｍｍ
のアールとなっている。The seaming seaming chuck 30 used for winding the can lid formed as described above has the shape shown in FIG. 5 and engages with the steeply inclined portion 21a of the can lid seaming chuck wall 21. A substantially vertical steeply inclined portion working surface 31, a substantially horizontal portion working surface 32 that is also a substantially horizontal plane like the substantially horizontal portion 21b, and a substantially gentle slope 2 of the chuck wall.
1c has a gently inclined portion working surface 33 which is inclined at substantially the same angle as the gently inclined portion 21c, and the joint portion 34 of the steeply inclined portion working surface 31 and the substantially horizontal portion working surface 32 has a radius of 0.5 to 0.5. 1.0 mm
Has become
【００１９】以上のように形成された缶蓋を上記シーミ
ングチャックを有するシーマーで巻締すると、第１次巻
締開始時には、シーミングチャック３０の緩傾斜部作用
面３３がチャックウォールの緩傾斜部２１ｃと圧接係合
すると共に、略水平部作用面３２が略水平部２１ｂと圧
接接合し、さらに接合アール部３４がチャックウォール
の接合アール部に圧接係合するので、強い接触抵抗を得
ることができ、缶蓋の滑りを確実に防止することができ
る。When the can lid formed as described above is wound with the seamer having the seaming chuck, the gently inclined portion working surface 33 of the seaming chuck 30 is gently inclined at the chuck wall at the start of the first winding. Since the substantially horizontal portion working surface 32 is pressure-welded to the substantially horizontal portion 21b while the portion 21c is pressure-contact engaged, the joint radius portion 34 is pressure-contact engaged to the joint radius portion of the chuck wall to obtain a strong contact resistance. Therefore, slippage of the can lid can be reliably prevented.
【００２０】[0020]
【発明の効果】以上のように、本発明によれば、チャッ
クウォールの傾斜角を大きくして、強化環状溝の直径を
小さくしてセンターパネル面を小さくして耐圧性を大き
くして薄肉化を図った缶蓋において、巻締時の缶蓋とチ
ャックウォールとのスリップが生じることを確実に防止
することができ、缶蓋にシーミングウォールに損傷を与
えることがなく良好に巻締ることができ、且つ巻締加工
中缶蓋のチャックウォールを巻締ロールに対して十分に
バックアップができて巻締終了後の巻締部のスプリング
バックが少なく、強固に巻締することを可能にし、従来
密封性の点で実用化が困難であったチャックウォールの
傾斜角を大きくして耐圧性の向上をめざした缶蓋の実用
化を図ることができる。As described above, according to the present invention, the chuck wall has a large inclination angle, the diameter of the reinforced annular groove is small, the center panel surface is small, and the pressure resistance is large to reduce the wall thickness. With this can lid, it is possible to reliably prevent slipping between the can lid and the chuck wall during winding, and to perform good winding without damaging the seaming wall on the can lid. In addition, the chuck wall of the can lid can be sufficiently backed up to the winding roll during the winding process, and there is little springback of the winding part after the winding is completed, which enables strong winding. It is possible to put the can lid into practical use aiming at the improvement of the pressure resistance by increasing the inclination angle of the chuck wall, which has been difficult to put into practical use in terms of sealing performance.
【図１】本発明の実施形態に係る缶蓋の要部断面図であ
る。FIG. 1 is a cross-sectional view of essential parts of a can lid according to an embodiment of the present invention.
【図２】缶胴への第１次巻締前の状態を示す要部断面図
ある。FIG. 2 is a cross-sectional view of an essential part showing a state before the first winding around the can body.
【図３】その第１次巻締終了時の状態を示す要部断面図
である。FIG. 3 is a cross-sectional view of an essential part showing a state at the end of the primary winding.
【図４】その巻締完了後の缶の巻締部の密封状態を示す
要部断面図である。FIG. 4 is a cross-sectional view of essential parts showing a sealed state of a winding portion of the can after the winding is completed.
【図５】本発明の他の実施形態に係る缶蓋の要部断面図
である。FIG. 5 is a cross-sectional view of essential parts of a can lid according to another embodiment of the present invention.
【図６】従来の缶蓋の要部断面図である。FIG. 6 is a sectional view of a main part of a conventional can lid.
【図７】従来の缶蓋の第１次巻締終了時の状態を示す要
部断面図である。FIG. 7 is a cross-sectional view of an essential part showing a state of a conventional can lid at the end of primary winding.
【図８】前記従来の缶蓋の巻締完了後の缶の巻締部の密
封状態を示す要部断面図である。FIG. 8 is a cross-sectional view of essential parts showing a sealed state of the winding portion of the can after the conventional winding of the can lid is completed.
１、２０ 缶蓋 ２ センターパ
ネル
４、２１ チャックウォール ４ａ、２１ａ 急
傾斜部
４ｂ、２１ｃ 緩傾斜部 ２１ｂ 略水平部
６、２２ アール屈曲部 １０ シーミング
チャック
１１、３１ 急傾斜部作用面 １２、３３ 緩
傾斜部作用面
１３ 接合部 １７ 缶胴
２５ 第１次巻締ロール ３２ 略水平部
作用面1, 20 Can lid 2 Center panel 4, 21 Chuck wall 4a, 21a Steep slope part 4b, 21c Slow slope part 21b Substantially horizontal part 6, 22 Earl bending part 10 Seaming chuck 11, 31 Steep slope part working surface 12, 33 Slowly inclined part working surface 13 Joining part 17 Can body 25 Primary winding roll 32 Substantially horizontal part working surface
───────────────────────────────────────────────────── フロントページの続き (72)発明者 金田 進一 神奈川県横浜市鶴見区矢向１−１−70 東 洋製罐株式会社技術本部内 Ｆターム(参考） 3E061 AA16 AB04 BA01 BA02 BB07 DB09 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Shinichi Kaneda Kanagawa Prefecture Yokohama City Tsurumi Ward Yamu 1-1-70 East Yokan Co., Ltd. F-term (reference) 3E061 AA16 AB04 BA01 BA02 BB07 DB09
Claims (6)
グチャックウォール、及びカール部を有する缶蓋におい
て、前記シーミングチャックウォールは、前記カール部
から続く急傾斜部と前記強化環状溝の外周壁に続く緩傾
斜部が連接してなり、前記急傾斜部が垂直軸線に対して
５°〜１５°外側に急傾斜し、前記緩傾斜部が垂直軸線
に対して３０゜〜６０゜外側に緩傾斜していることを特
徴とする缶蓋。1. A can lid having a center panel, a reinforced annular groove, a seaming chuck wall, and a curl portion, wherein the seaming chuck wall is formed on a steeply inclined portion extending from the curl portion and an outer peripheral wall of the reinforced annular groove. The following gently sloping portions are connected to each other, the steeply sloping portion steeply inclines outward by 5 ° to 15 ° with respect to the vertical axis, and the gently sloping portion gently inclines outwardly by 30 ° to 60 ° with respect to the vertical axis. A can lid characterized by being.
グチャックウォール、及びカール部を有する缶蓋におい
て、前記シーミングチャックウォールは、前記カール部
から続く急傾斜部、前記強化環状溝の外周壁に続く緩傾
斜部、及び前記急傾斜部と前記緩傾斜部との間に設けら
れた略水平部が連接してなり、前記急傾斜部が垂直軸線
に対して５°〜１５°外側に急傾斜し、前記緩傾斜部が
垂直軸線に対して３０゜〜６０゜外側に緩傾斜している
ことを特徴とする缶蓋。2. A can lid having a center panel, a reinforced annular groove, a seaming chuck wall, and a curl portion, wherein the seaming chuck wall is formed on a steeply inclined portion extending from the curl portion and an outer peripheral wall of the reinforced annular groove. The following gentle sloping portion and a substantially horizontal portion provided between the steep sloping portion and the gentle sloping portion are connected to each other, and the steep sloping portion steeply inclines 5 ° to 15 ° outward with respect to the vertical axis. The can lid, wherein the gently sloping portion is gently sloping outward by 30 ° to 60 ° with respect to the vertical axis.
０．７５ｍｍである請求項２に記載の缶蓋。3. The annular horizontal width of the substantially horizontal portion is 0.5 to
The can lid according to claim 2, which is 0.75 mm.
斜部の連接位置、又は前記略水平部の位置は、前記カー
ル部頂面から２．５〜３．５ｍｍの深さ位置にある請求
項１、２又は３に記載の缶蓋。4. The connecting position of the steeply sloped portion and the gently sloped portion of the chuck wall, or the position of the substantially horizontal portion is at a depth position of 2.5 to 3.5 mm from the top surface of the curl portion. The can lid according to 1, 2, or 3.
面までの高さが、５．５〜７．５ｍｍである請求項１〜
４いずれかに記載の缶蓋。5. The height from the top surface of the curl portion to the lower surface of the reinforcing annular groove is 5.5 to 7.5 mm.
4. The can lid according to any one of 4.
１．０ｍｍである請求項１〜５何れかに記載の缶蓋。6. The reinforced annular groove has an inner surface radius of 0.35 to 0.35.
It is 1.0 mm, The can lid in any one of Claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001334547A JP4003435B2 (en) | 2001-10-31 | 2001-10-31 | Can lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001334547A JP4003435B2 (en) | 2001-10-31 | 2001-10-31 | Can lid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003136168A true JP2003136168A (en) | 2003-05-14 |
| JP4003435B2 JP4003435B2 (en) | 2007-11-07 |
Family
ID=19149658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001334547A Expired - Fee Related JP4003435B2 (en) | 2001-10-31 | 2001-10-31 | Can lid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4003435B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005119747A (en) * | 2003-09-26 | 2005-05-12 | Jfe Steel Kk | Can lid excellent in pressure resistance |
| JP2008254049A (en) * | 2007-04-06 | 2008-10-23 | Showa Aluminum Kan Kk | Shell press forming method of can lid, and shell press die used therefor |
| US7591392B2 (en) * | 2002-04-22 | 2009-09-22 | Crown Packaging Technology, Inc. | Can end |
| US7673768B2 (en) | 1999-12-08 | 2010-03-09 | Metal Container Corporation | Can lid closure |
| JP2010132355A (en) * | 2007-03-29 | 2010-06-17 | Showa Aluminum Kan Kk | Can lid |
| US8490825B2 (en) | 1999-12-08 | 2013-07-23 | Metal Container Corporation | Can lid closure and method of joining a can lid closure to a can body |
| CN106672390A (en) * | 2017-03-07 | 2017-05-17 | 苏州斯莱克精密设备股份有限公司 | Pressure-resistant basic cover, easy-to-pull cover and ring-pull can with easy-to-pull cover |
-
2001
- 2001-10-31 JP JP2001334547A patent/JP4003435B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8490825B2 (en) | 1999-12-08 | 2013-07-23 | Metal Container Corporation | Can lid closure and method of joining a can lid closure to a can body |
| US7673768B2 (en) | 1999-12-08 | 2010-03-09 | Metal Container Corporation | Can lid closure |
| US7591392B2 (en) * | 2002-04-22 | 2009-09-22 | 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 |
| US8496132B2 (en) | 2002-04-22 | 2013-07-30 | Crown Packaging Technology, Inc. | Can end |
| JP2005119747A (en) * | 2003-09-26 | 2005-05-12 | Jfe Steel Kk | Can lid excellent in pressure resistance |
| JP4517799B2 (en) * | 2003-09-26 | 2010-08-04 | Ｊｆｅスチール株式会社 | Can lid with excellent pressure resistance |
| AU2005302008B2 (en) * | 2004-11-01 | 2012-01-12 | Crown Packaging Technology, Inc. | Can end |
| JP2010132355A (en) * | 2007-03-29 | 2010-06-17 | Showa Aluminum Kan Kk | Can lid |
| JP4554640B2 (en) * | 2007-04-06 | 2010-09-29 | 昭和アルミニウム缶株式会社 | Shell press molding method of can lid and die for shell press used therefor |
| JP2008254049A (en) * | 2007-04-06 | 2008-10-23 | Showa Aluminum Kan Kk | Shell press forming method of can lid, and shell press die used therefor |
| CN106672390A (en) * | 2017-03-07 | 2017-05-17 | 苏州斯莱克精密设备股份有限公司 | Pressure-resistant basic cover, easy-to-pull cover and ring-pull can with easy-to-pull cover |
| CN106672390B (en) * | 2017-03-07 | 2018-07-13 | 苏州斯莱克精密设备股份有限公司 | Pressure-resistant basic lid, easy open cover and the pop can with easy open cover |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4003435B2 (en) | 2007-11-07 |
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