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JP3561796B2 - Metal can with screw - Google Patents

Metal can with screw Download PDF

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Publication number
JP3561796B2
JP3561796B2 JP2000025058A JP2000025058A JP3561796B2 JP 3561796 B2 JP3561796 B2 JP 3561796B2 JP 2000025058 A JP2000025058 A JP 2000025058A JP 2000025058 A JP2000025058 A JP 2000025058A JP 3561796 B2 JP3561796 B2 JP 3561796B2
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JP
Japan
Prior art keywords
mouth
screw
shoulder
metal
present
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2000025058A
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Japanese (ja)
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JP2001213416A (en
Inventor
成典 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takeuchi Press Industries Co Ltd
Original Assignee
Takeuchi Press Industries Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Takeuchi Press Industries Co Ltd filed Critical Takeuchi Press Industries Co Ltd
Priority to JP2000025058A priority Critical patent/JP3561796B2/en
Priority to TW089124871A priority patent/TW448120B/en
Priority to EP05108478A priority patent/EP1632436B1/en
Priority to KR1020027006723A priority patent/KR100558374B1/en
Priority to PCT/JP2000/008320 priority patent/WO2001038185A1/en
Priority to DE60042132T priority patent/DE60042132D1/en
Priority to CA002392234A priority patent/CA2392234C/en
Priority to CA002529831A priority patent/CA2529831C/en
Priority to EP00977937.2A priority patent/EP1247750B1/en
Priority to US10/148,003 priority patent/US6959830B1/en
Publication of JP2001213416A publication Critical patent/JP2001213416A/en
Application granted granted Critical
Publication of JP3561796B2 publication Critical patent/JP3561796B2/en
Priority to US11/032,077 priority patent/US7171840B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【0001】
【発明の属する技術分野】
この発明は、ねじ部を有する口部及び肩部上端の強度向上を図ったねじ付金属缶に関する。
【0002】
【従来の技術】
従来、図10に示すように、アルミニウム等の金属材料から絞り加工、絞りしごき加工またはインパクト成形によって造られるねじ付金属缶は、金属缶の口部外周に形成されたねじ部に、キャップが螺合されて口部が密閉されていた。図10は、従来のねじ付金属缶を示す断面図である。50は、缶本体であり、この缶本体50は上方からカール部51、ねじ部を有する口部52、テーパー状の肩部53、胴部54及び底部55から構成されている。そして、キャップ56の雌ねじと、口部52の雄ねじとを螺合し、缶本体50の口部52が封鎖されていた。そして、従来の缶本体50にあっては、肩部53が、その肩部上端53aに至るまで、直線的に形成され、肩部上端53aからねじ部下端52aに連続している。
【0003】
また、図12に示す従来の缶本体60において、肩部61の全体に、略等間隔毎に、複数の凸部62(図面では3個)を形成したねじ付金属缶が市場に流出している。
【0004】
【発明が解決しようとする課題】
しかし、図10に示す缶本体50にあっては、図11に示すように、口部52のねじ部下端52aと、肩部53の肩部上端53a(領域W)が、半径方向及び軸方向の押圧力(圧力P、Q)に対して弱く、領域Wが潰れたり、座屈する欠点があった。また、図12に示す缶本体60においては、肩部61全体に複数の凸部62を形成した目的は、主としてねじ付金属缶の意匠的効果を目的とすると共に、製造工程であるネッキング加工において、肩部61に皺が発生するのを防止する目的で形成されたものである。したがって、口部及び肩部上端における強度向上を企図したものではなかった。
【0005】
この発明は、このような従来の課題に着目してなされたもので、ねじ部52、特にねじ部下端52aと、肩部53の肩部上端53a(領域W)の半径方向及び軸方向の強度向上を企図したねじ付金属缶を提供することを目的とする。
【0006】
【課題を解決するための手段】
この課題を解決するために、請求項1記載の発明に対応する手段は、金属材料から絞り加工、絞りしごき加工またはインパクト成形によって造られ、かつ缶本体がねじ部を有する口部、テーパー状の肩部、胴部及び底部から構成され、キャップを螺合して高い密封性を保持でき、半径方向及び軸方向の押圧力に対して口部又は肩部上端が変形又は座屈しやすいねじ付金属缶において、キャッピングする際に、ねじ部及びビード部にかかる荷重により、ねじ部又はビード部の半径方向の変形又は軸方向の座屈が生じないように、部下端から、半径方向に拡大するテーパー状の肩部上端周囲に一個の内側に滑らかに湾曲する凹部および/または一個の外側に滑らかに湾曲する凸部を形成したものである。
【0007】
この課題を解決するために、請求項2記載の発明に対応する手段は、金属材料から絞り加工、絞りしごき加工またはインパクト成形によって造られ、かつ缶本体がねじ部を有する口部、テーパー状の肩部、胴部及び底部から構成され、キャップを螺合して高い密封性を保持でき、半径方向及び軸方向の押圧力に対して口部又は肩部上端が変形又は座屈しやすいねじ付金属缶において、キャッピングする際に、ねじ部及びビード部にかかる荷重により、ねじ部又はビード部の半径方向の変形又は軸方向の座屈が生じないように、部下端から、半径方向に拡大するテーパー状の肩部上端周囲に一個の内側に滑らかに湾曲する凹部を形成したものである。
【0008】
【発明の実施の形態】
次に、この発明の実施の形態を図面に基づいて説明する。図1〜図3は、この発明の第1実施の形態を示す図面である。この第1実施の形態の特徴は、口部下(ねじ部下端)2aから下方に連続する、肩部3の肩部上端3aの部位(領域A)に、内側に滑らかに湾曲する凹部4を形成し、その下方に連続して、外側に滑らかに湾曲する凸部5を形成したものである。そして、凸部5の下方は、直線的に連続している。
【0009】
図3は、この第1実施の形態の領域Aを、さらに拡大した断面図である。口部下端2aから下方に連続する凹部4の曲率半径はR=0.5〜5mmであり、具体的にはR=3mm程度が好ましい。次に、凹部4から連続する滑らかな凸部5の湾曲の程度は、垂直方向に対してθ=35°〜60°の傾斜を呈しており、具体的にはθ=45°程度が好ましい。
【0010】
図4は、この発明の第2実施の形態を示す図面である。この第2実施の形態の特徴は、口部下端2aから連続する肩部3の肩部上端3aの部位(領域B)に内側に湾曲する、一個の滑らかな凹部6を形成したものである。この凹部6の曲率半径は、第1実施の形態の凹部4と同程度が好ましい。
【0011】
図5は、この発明の第3実施の形態を示す図面である。この第3実施の形態の特徴は、口部下端2aから連続する肩部3の肩部上端3aの部位(領域C)に外側に湾曲する、一個の滑らかな凸部7を形成したものである。この凸部7の湾曲の程度は、第1実施の形態の凸部5と同程度が好ましい。
【0012】
図6は、この発明の第4実施の形態を示す図面である。この第4実施の形態の特徴は、口部下端2aから連続する肩部3の肩部上端3aの部位(領域D)に内側に湾曲する滑らかな凹部8を形成し、次に連続して、外側に滑らかな凸部9を形成し、さらに連続して、内側に湾曲する滑らかな凹部10を形成したものである。すなわち、領域Dに二個の凹部8、10と、一個の凸部9を形成したものである。この他の実施の形態として、例えば各二個の凹部、凸部が混在して形成されてもよい(図示せず)。
【0013】
次に、この発明の作用について説明する。この発明に係る第1実施の形態〜第4実施の形態における各々の領域A、B、C、Dに曲げ加工を施して凹部または/及び凸部を形成したから、半径方向及び軸方向の夫々の押圧力P、Qに対しての強度が向上した。凹部または/及び凸部の曲率半径R、傾斜角θを大きくすることもできる。しかし、大きくした場合半径方向の押圧力Pに対しては強くなるが、軸方向の押圧力Qに対しては弱くなる欠点がある。したがって、押圧力P、Q共に強度を向上させるためには、前記した凹部の曲率半径R=0.5〜5mm、傾斜角θ=35°〜60°程度が好ましい。
【0014】
【実施例】
次に、この発明の第1実施の形態におけるねじ付金属缶の口部及び肩部上端の強度試験結果を次に示す。図7は、口部2のビート部2bに、上方から押圧力F1で押圧するビート部の潰れ試験を示す図面、図8は、口部2に上方から押圧力F2で押圧する、ねじ部の潰れ試験を示す図面、図9は、口部2の上端に、上方から押圧力F3で押圧する、座屈強度試験を示す図面である。
(試験条件)
缶外径;66mmφ、缶高さ;166mm、口部外径;37.8mmφ、ねじ部及びビート部の肉厚;0.32mm、肩部下端の肉厚;0.2mm、缶胴の肉厚;0.15mm
【表1】
上記試験結果によれば、本発明に係るねじ付金属缶は、ビート部の潰れ強度が47.8%、ねじ部の潰れ強度が3.6%、ねじ部、ビード部及び肩部上端の座屈強度が14.2%、夫々向上していることが判明した。
【0015】
【発明の効果】
以上説明してきたように、この発明によれば、ねじ付金属缶の口部、特にねじ部下端から肩部上端における領域の強度の向上を図ることができる効果を有する。
【図面の簡単な説明】
【図1】この発明の第1実施の形態を示す正面断面図。
【図2】この発明の第1実施の形態の口部及び肩部上端を示す断面図。
【図3】この発明の第1実施の形態の領域Aを示す拡大断面図。
【図4】この発明の第2実施の形態の口部及び肩部上端を示す断面図。
【図5】この発明の第3実施の形態の口部及び肩部上端を示す断面図。
【図6】この発明の第4実施の形態の口部及び肩部上端を示す断面図。
【図7】この発明に係るねじ付金属缶のビート部の潰れ強度試験を示す図面。
【図8】この発明に係るねじ付金属缶のねじ部の潰れ強度試験を示す図面。
【図9】この発明に係るねじ付金属缶の肩部の座屈強度試験を示す図面。
【図10】従来のねじ付金属缶を示す断面図。
【図11】従来のねじ付金属缶の口部及び肩部上端を示す断面図。
【図12】従来の肩部周囲に段部を形成したねじ付金属缶の正面図。
【符号の説明】
1 缶本体
2 口部
2a ねじ部下端
3 肩部
3a 肩部上端
4 6 10 凹部
5 7 9 凸部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a threaded metal can with improved strength at a mouth portion having a thread portion and an upper end of a shoulder portion.
[0002]
[Prior art]
Conventionally, as shown in FIG. 10, a metal can with a screw made from a metal material such as aluminum by drawing, drawing and ironing or impact molding has a cap formed on a screw portion formed around the mouth of the metal can. The mouth was sealed. FIG. 10 is a cross-sectional view showing a conventional screwed metal can. Reference numeral 50 denotes a can main body. The can main body 50 includes a curl portion 51, a mouth portion 52 having a screw portion, a tapered shoulder portion 53, a body portion 54, and a bottom portion 55 from above. Then, the female screw of the cap 56 and the male screw of the mouth 52 were screwed together, and the mouth 52 of the can body 50 was closed. In the conventional can main body 50, the shoulder 53 is formed linearly up to the shoulder upper end 53a, and is continuous from the shoulder upper end 53a to the screw lower end 52a.
[0003]
Further, in the conventional can main body 60 shown in FIG. 12, a threaded metal can having a plurality of convex portions 62 (three in the drawing) formed at substantially equal intervals on the entire shoulder portion 61 flows out to the market. I have.
[0004]
[Problems to be solved by the invention]
However, in the can main body 50 shown in FIG. 10, as shown in FIG. 11, the screw lower end 52a of the mouth 52 and the shoulder upper end 53a (region W) of the shoulder 53 are formed in the radial direction and the axial direction. This is weak against the pressing force (pressures P and Q), and the area W is crushed or buckled. Further, in the can main body 60 shown in FIG. 12, the purpose of forming the plurality of convex portions 62 over the entire shoulder portion 61 is mainly to achieve the design effect of the metal can with a screw, and to perform the necking process in the manufacturing process. , Are formed for the purpose of preventing wrinkles from occurring on the shoulder portion 61. Therefore, it was not intended to improve the strength at the mouth and the upper end of the shoulder.
[0005]
The present invention has been made in view of such a conventional problem, and the radial and axial strengths of the screw portion 52, particularly the lower end portion 52a of the screw portion and the upper end portion 53a (region W) of the shoulder portion 53, are provided. An object of the present invention is to provide a metal can with a screw which is intended to be improved.
[0006]
[Means for Solving the Problems]
In order to solve this problem, a means corresponding to the invention described in claim 1 is provided by drawing, drawing or ironing or impact molding from a metal material, and the can body has a mouth having a threaded portion, a tapered shape. It is composed of a shoulder, a torso, and a bottom, and can be screwed with a cap to maintain high sealing performance, and a threaded metal whose upper end of the mouth or shoulder is easily deformed or buckled against radial and axial pressing forces. in the can, upon capping, the load applied to the screw portion and the bead portion, as buckling deformation or axial radial screw portion or the bead portion does not occur, to expand from the mouth subordinates end, radially One inwardly curved concave portion and / or one outwardly curved convex portion are formed around the upper end of the tapered shoulder.
[0007]
In order to solve this problem, a means corresponding to the invention described in claim 2 is provided by drawing, drawing or ironing or impact molding from a metal material, and the can body has a mouth portion having a thread portion, a tapered shape. It is composed of a shoulder, a torso, and a bottom, and can be screwed with a cap to maintain high sealing performance, and a threaded metal whose upper end of the mouth or shoulder is easily deformed or buckled against radial and axial pressing forces. in the can, upon capping, the load applied to the screw portion and the bead portion, as buckling deformation or axial radial screw portion or the bead portion does not occur, to expand from the mouth subordinates end, radially the shoulder portion around top of the tapered is obtained by forming a concave portion smoothly curved one inside.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 are drawings showing a first embodiment of the present invention. The features of the first embodiment, continuously mouth subordinates end (threaded portion lower end) 2a downward, a portion of the shoulder the upper end 3a of the shoulder 3 (region A), a concave portion 4 to smoothly curved inward The convex portion 5 is formed and continuously formed below the convex portion 5 and smoothly curved outward. The lower part of the convex portion 5 is linearly continuous.
[0009]
FIG. 3 is a cross-sectional view further enlarging the region A of the first embodiment. The radius of curvature of the concave portion 4 to be continuous from the mouth subordinates end 2a below is R = 0.5 to 5 mm, in particular approximately R = 3 mm are preferred. Next, the degree of curvature of the smooth convex portion 5 continuing from the concave portion 4 exhibits an inclination of θ = 35 ° to 60 ° with respect to the vertical direction, and specifically, preferably θ = 45 °.
[0010]
FIG. 4 is a drawing showing a second embodiment of the present invention. The feature of this second embodiment is curved inwardly in a portion of the shoulder portion upper end 3a of the shoulder 3 continuous from the mouth subordinates end 2a (area B), it is obtained by forming a single smooth recess 6. The radius of curvature of the concave portion 6 is preferably substantially the same as that of the concave portion 4 of the first embodiment.
[0011]
FIG. 5 is a drawing showing a third embodiment of the present invention. The feature of this third embodiment is curved outward portion of the shoulder the upper end 3a of the shoulder 3 continuous from the mouth subordinates end 2a (region C), it is obtained by forming a single smooth protrusions 7 . It is preferable that the degree of curvature of the convex portion 7 is the same as that of the convex portion 5 of the first embodiment.
[0012]
FIG. 6 is a drawing showing a fourth embodiment of the present invention. This feature of the fourth embodiment is to form a smooth recess 8 which is curved inwardly in a portion of the shoulder portion upper end 3a of the shoulder 3 continuous from the mouth subordinates end 2a (region D), then in succession, A smooth convex portion 9 is formed on the outside, and a smooth concave portion 10 that curves inward is formed continuously. That is, two concave portions 8 and 10 and one convex portion 9 are formed in the region D. In another embodiment, for example, two concave portions and convex portions may be formed in a mixed manner (not shown).
[0013]
Next, the operation of the present invention will be described. Since each of the regions A, B, C, and D in the first to fourth embodiments according to the present invention is subjected to bending to form a concave portion and / or a convex portion, the regions A, B, C, and D are respectively formed in the radial direction and the axial direction. The strength with respect to the pressing forces P and Q was improved. The curvature radius R and the inclination angle θ of the concave portion and / or the convex portion can be increased. However, when it is increased, there is a drawback that it becomes stronger with respect to the pressing force P in the radial direction but becomes weaker with respect to the pressing force Q in the axial direction. Therefore, in order to improve the strength of both the pressing forces P and Q, it is preferable that the curvature radius R of the concave portion is about 0.5 to 5 mm and the inclination angle θ is about 35 ° to 60 °.
[0014]
【Example】
Next, the strength test results of the mouth and the upper end of the shoulder of the screwed metal can according to the first embodiment of the present invention are shown below. FIG. 7 is a drawing showing a crush test of a beat portion pressing the beat portion 2b of the mouth portion 2b from above with a pressing force F1, and FIG. 8 is a drawing of a screw portion pressing the mouth portion 2 from above with a pressing force F2. FIG. 9 is a drawing showing a crushing test, and FIG. 9 is a drawing showing a buckling strength test in which the upper end of the mouth 2 is pressed from above with a pressing force F3.
(Test condition)
Can outer diameter: 66 mmφ, can height: 166 mm, mouth outer diameter: 37.8 mmφ, wall thickness of screw and beat part; 0.32 mm, wall thickness of shoulder lower end; 0.2 mm, wall thickness of can body ; 0.15 mm
[Table 1]
According to the above test results, the threaded metal can according to the present invention has a crush strength of the beat portion of 47.8%, a crush strength of the screw portion of 3.6%, a screw portion, a bead portion, and a seat at the upper end of the shoulder portion. It was found that the flexural strength was improved by 14.2%.
[0015]
【The invention's effect】
As described above, according to the present invention, there is an effect that the strength of the mouth portion of the threaded metal can, particularly the region from the lower end of the screw portion to the upper end of the shoulder portion can be improved.
[Brief description of the drawings]
FIG. 1 is a front sectional view showing a first embodiment of the present invention.
FIG. 2 is a sectional view showing a mouth and a shoulder upper end according to the first embodiment of the present invention.
FIG. 3 is an enlarged sectional view showing a region A according to the first embodiment of the present invention.
FIG. 4 is a sectional view showing the mouth and the upper end of a shoulder according to a second embodiment of the present invention.
FIG. 5 is a sectional view showing a mouth and a shoulder upper end according to a third embodiment of the present invention.
FIG. 6 is a sectional view showing a mouth and an upper end of a shoulder according to a fourth embodiment of the present invention.
FIG. 7 is a view showing a crushing strength test of a beat portion of the threaded metal can according to the present invention.
FIG. 8 is a view showing a crushing strength test of a screw portion of the metal can with a screw according to the present invention.
FIG. 9 is a view showing a buckling strength test of a shoulder portion of the metal can with a screw according to the present invention.
FIG. 10 is a sectional view showing a conventional metal can with a screw.
FIG. 11 is a cross-sectional view showing the mouth and the upper end of a shoulder of a conventional screwed metal can.
FIG. 12 is a front view of a conventional threaded metal can having a shoulder formed around a shoulder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Can main body 2 Mouth part 2a Screw part lower end 3 Shoulder part 3a Shoulder upper end 4 6 10 Concave part 5 7 9 Convex part

Claims (2)

金属材料から絞り加工、絞りしごき加工またはインパクト成形によって造られ、かつ缶本体がねじ部を有する口部、テーパー状の肩部、胴部及び底部から構成され、キャップを螺合して高い密封性を保持でき、半径方向及び軸方向の押圧力に対して口部又は肩部上端が変形又は座屈しやすいねじ付金属缶において、
キャッピングする際に、ねじ部及びビード部にかかる荷重により、ねじ部又はビード部の半径方向の変形又は軸方向の座屈が生じないように、
部下端から、半径方向に拡大するテーパー状の肩部上端周囲に一個の内側に滑らかに湾曲する凹部および/または一個の外側に滑らかに湾曲する凸部を形成したことを特徴とするねじ付金属缶。
Made from metal material by drawing, drawing and ironing or impact molding, and the can body is composed of a mouth with a threaded portion, a tapered shoulder, a body and a bottom, and screwed a cap to provide high sealing performance In a metal can with a screw, which can easily deform or buckle the upper end of the mouth or shoulder against the pressing force in the radial and axial directions ,
At the time of capping, the load on the screw portion and the bead portion does not cause radial deformation or axial buckling of the screw portion or the bead portion,
Mouth subordinates end, characterized in that the formation of the convex portions smoothly curved in a recess and / or one outer smoothly curving one of the inside shoulder around top of the tapered expanding radially Metal can with screw.
金属材料から絞り加工、絞りしごき加工またはインパクト成形によって造られ、かつ缶本体がねじ部を有する口部、テーパー状の肩部、胴部及び底部から構成され、キャップを螺合して高い密封性を保持でき、半径方向及び軸方向の押圧力に対して口部又は肩部上端が変形又は座屈しやすいねじ付金属缶において、
キャッピングする際に、ねじ部及びビード部にかかる荷重により、ねじ部又はビード部の半径方向の変形又は軸方向の座屈が生じないように、
部下端から、半径方向に拡大するテーパー状の肩部上端周囲に一個の内側に滑らかに湾曲する凹部を形成したことを特徴とするねじ付金属缶。
Made from metal material by drawing, drawing and ironing or impact molding, and the main body of the can is composed of a mouth with a threaded portion, a tapered shoulder, a trunk and a bottom. In a metal can with a screw, which can easily deform or buckle the upper end of the mouth or shoulder against the pressing force in the radial and axial directions ,
At the time of capping, the load on the screw portion and the bead portion does not cause radial deformation or axial buckling of the screw portion or the bead portion,
Mouth subordinates end, tapered shoulder upper metal can with a screw, characterized in that the formation of the concave portion for smoothly curved one inside the periphery to expand radially.
JP2000025058A 1999-11-26 2000-02-02 Metal can with screw Expired - Lifetime JP3561796B2 (en)

Priority Applications (11)

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JP2000025058A JP3561796B2 (en) 2000-02-02 2000-02-02 Metal can with screw
TW089124871A TW448120B (en) 1999-11-26 2000-11-23 Metal container with thread
US10/148,003 US6959830B1 (en) 1999-11-26 2000-11-24 Metal container with thread
PCT/JP2000/008320 WO2001038185A1 (en) 1999-11-26 2000-11-24 Metal container with thread
DE60042132T DE60042132D1 (en) 1999-11-26 2000-11-24 Metal container with thread
CA002392234A CA2392234C (en) 1999-11-26 2000-11-24 Metal container with thread
EP05108478A EP1632436B1 (en) 1999-11-26 2000-11-24 Metal container with thread
EP00977937.2A EP1247750B1 (en) 1999-11-26 2000-11-24 Metal container with thread
KR1020027006723A KR100558374B1 (en) 1999-11-26 2000-11-24 Metal container with thread
CA002529831A CA2529831C (en) 1999-11-26 2000-11-24 Metal container with thread
US11/032,077 US7171840B2 (en) 1999-11-26 2005-01-11 Metal container with thread

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