JP7004565B2 - Bottle can - Google Patents

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JP7004565B2
JP7004565B2 JP2017245161A JP2017245161A JP7004565B2 JP 7004565 B2 JP7004565 B2 JP 7004565B2 JP 2017245161 A JP2017245161 A JP 2017245161A JP 2017245161 A JP2017245161 A JP 2017245161A JP 7004565 B2 JP7004565 B2 JP 7004565B2
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inner peripheral
axis
opening
extension line
end side
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JP2018104094A (en
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友明 飯村
淳 山下
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Universal Can Corp
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Description

本発明は、胴部から上端側に向かうに従い縮径する肩部と、この肩部からさらに上端側に向かって延びる首部と、この首部の上端側に設けられて上端に開口部を備えたキャップ取付部とを有する金属製のボトル缶に関するものである。 In the present invention, a shoulder portion whose diameter is reduced toward the upper end side from the body portion, a neck portion extending further from the shoulder portion toward the upper end side, and a cap provided on the upper end side of the neck portion and having an opening at the upper end. It relates to a metal bottle can having a mounting portion.

このようなボトル缶として、例えば特許文献1には、例えば飲料缶として用いられるものとして、アルミニウムまたはアルミニウム合金等の金属から成り、軸線に沿って延びる胴部を有して、この胴部の上端に開口部が設けられ、胴部の下端に底部が設けられた有底筒状をなす缶本体を備えたものが記載されている。胴部の開口部側部分には絞り加工が施されて一段小径とされており、軸線方向上方側に向かうに従い漸次縮径する肩部と、この肩部の上端に連なり、軸線に沿って延びる円筒状の首部とが設けられるとともに、この首部の上方部分には、ネジ部を有する口金部が設けられている。 As such a bottle can, for example, in Patent Document 1, for example, as used as a beverage can, the body is made of a metal such as aluminum or an aluminum alloy and has a body extending along an axis, and the upper end of the body is provided. A can body having a bottomed tubular shape with an opening provided at the lower end of the body and a bottom provided at the lower end of the body is described. The opening side of the body is drawn to a smaller diameter, and it extends along the axis along the shoulder, which gradually shrinks in diameter toward the upper side in the axial direction, and the upper end of this shoulder. A cylindrical neck portion is provided, and a mouthpiece portion having a screw portion is provided in an upper portion of the neck portion.

特開2009-102042号公報Japanese Unexamined Patent Publication No. 2009-102042

ところで、このようなボトル缶では通常、肩部の胴部に連なる部分が、軸線(缶軸)に沿った断面において缶本体の外周側に膨らむ凸曲線を描く凸曲線部とされるとともに、肩部の首部に連なる部分は、同じく缶軸に沿った断面において缶本体の内周側に凹む凹曲線を描く凹曲線部とされて、肩部が缶本体の上端側に向かうに従い漸次縮径するように成形されている(例えば、特許文献1の図1参照。)。 By the way, in such a bottle can, the portion connected to the body of the shoulder is usually a convex curved portion that draws a convex curve bulging toward the outer peripheral side of the can body in a cross section along the axis (can axis), and the shoulder. The portion connected to the neck of the portion is a concave curved portion that draws a concave curve that is recessed toward the inner peripheral side of the can body in the cross section along the can axis, and the diameter is gradually reduced as the shoulder portion toward the upper end side of the can body. (For example, see FIG. 1 of Patent Document 1).

ところが、そのようなボトル缶において、口金部に口をつけて飲料等の液体の内容物を直接飲もうとしたり、コップやグラスに注ぎ出してから飲もうとしたりして、缶本体を傾けていったとき、上記凸曲線部の膨らみが大きすぎると、内容物の液面が凸曲線部と凹曲線部との境界に達した状態で、凸曲面部の内面が口金部とは反対側の液面の延長面よりも上側に位置してしまい、これら凸曲線部の内面と液面の延長面との間に間隔があいて閉ざされた空間が形成されることがある。 However, in such a bottle can, the body of the can was tilted by putting a mouth on the mouthpiece and trying to drink the liquid contents such as a drink directly, or by pouring it into a cup or a glass and then trying to drink it. When the bulge of the convex curved portion is too large, the inner surface of the convex curved portion is on the opposite side of the base portion while the liquid level of the contents reaches the boundary between the convex curved portion and the concave curved portion. It may be located above the extension surface of the above, and a closed space may be formed with a gap between the inner surface of these convex curves and the extension surface of the liquid surface.

そして、この空間には、液面が上記境界に達するまでは内容物が満たされて残されることになるが、液面が境界から離れた瞬間に上記空間が開放されて空気が取り込まれ、これにより該空間に満たされていた内容物が吹き出して直接飲むときの飲み心地を損ねたり、コップやグラスからこぼれたりすることがある。この点、ガラス瓶のような透明な容器であると、容器内の凸曲線部に空気が溜まっていることが分かるため、内容物が吹き出すであろうことも事前に察知するのは容易であるが、金属製のボトル缶のように内部が見えない容器では、飲料の吹き出しを予測することは困難である。 Then, the contents are filled and left in this space until the liquid level reaches the boundary, but at the moment when the liquid level leaves the boundary, the space is opened and air is taken in. As a result, the contents filled in the space may blow out and impair the drinking comfort when drinking directly, or may spill from a cup or glass. In this respect, in the case of a transparent container such as a glass bottle, it can be seen that air is accumulated in the convex curve portion inside the container, so it is easy to detect in advance that the contents will be blown out. It is difficult to predict the blowout of a beverage in a container whose inside is not visible, such as a metal bottle can.

本発明は、このような背景の下になされたもので、内部が見えない金属製のボトル缶において、内容物が吹き出すのを防ぐことが可能なボトル缶を提供することを目的としている。 The present invention has been made under such a background, and an object of the present invention is to provide a bottle can that can prevent the contents from being blown out in a metal bottle can whose inside cannot be seen.

上記課題を解決して、このような目的を達成するために、本発明は、缶軸を中心とする有底筒状の缶本体の胴部から上端側に向かうに従い縮径する肩部と、この肩部からさらに上端側に向かって延びる首部と、この首部の上端側に設けられて上端に開口部を備えたキャップ取付部とを有する金属製のボトル缶であって、上記肩部は、上記缶軸に沿った断面において、上記胴部の上端から上記缶本体の外周側に膨らむ凸曲線を描きつつ上端内周側に向かう凸曲線部と、上記首部の下端から上記缶本体の内周側に凹む凹曲線を描きつつ下端外周側に向かう凹曲線部とを備え、上記凸曲線部の上端と上記凹曲線部の下端とは、上記缶本体の上端側に向かうに従い内周側に向かう直線部を介して接続されており、上記缶軸に沿った断面において、上記開口部の内周縁に接して上記缶本体の内周側に向かうに従い下端側に延び、上記缶軸を越えて上記開口部の内周縁との接点とは反対側の上記首部の内周面に交差する延長線を想定し、この延長線を、上記開口部の内周縁と接した状態を維持しつつ上記缶本体の下端側に回転させたとき、上記肩部の内周面は、上記延長線と、常に1点で交差し、または上記直線部が重なり合うように形成され、上記直線部が上記延長線と1点で交差し、または重なり合ったとき、上記凸曲線部の内面は、上記缶軸に沿った断面において、上記延長線よりも外周側にはみ出すことがないことを特徴とする。 In order to solve the above problems and achieve such an object, the present invention has a shoulder portion whose diameter is reduced from the body portion of the bottomed tubular can body centered on the can shaft toward the upper end side. A metal bottle can having a neck extending further from the shoulder toward the upper end and a cap attachment portion provided on the upper end side of the neck and having an opening at the upper end, wherein the shoulder is a. In the cross section along the can axis, a convex curved portion extending from the upper end of the body to the outer peripheral side of the can body and toward the inner peripheral side of the upper end, and an inner circumference of the can body from the lower end of the neck. It is provided with a concave curved portion toward the outer peripheral side of the lower end while drawing a concave curve recessed on the side, and the upper end of the convex curved portion and the lower end of the concave curved portion are on the inner peripheral side toward the upper end side of the can body. It is connected via a straight line portion toward which it is connected, and in a cross section along the can axis, it comes into contact with the inner peripheral edge of the opening and extends toward the lower end side toward the inner peripheral side of the can body, and extends beyond the can axis. Assuming an extension line that intersects the inner peripheral surface of the neck on the side opposite to the contact point with the inner peripheral edge of the opening, the can while maintaining the extension line in contact with the inner peripheral edge of the opening. When rotated to the lower end side of the main body, the inner peripheral surface of the shoulder portion is formed so as to always intersect the extension line at one point or overlap the straight portion, and the straight portion overlaps with the extension line. When intersecting or overlapping at one point, the inner surface of the convex curved portion does not protrude to the outer peripheral side of the extension line in the cross section along the can axis .

このようなボトル缶に充填された飲料等の液体の内容物は、缶本体を傾けることによって傾けられた開口部内周縁の下端から注ぎ出されると、内容物の液面がこの開口部内周縁の下端から水平に延び、缶軸に沿った鉛直方向に延びる断面においては、液面は開口部の内周縁と接する水平線を維持しつつ上記開口部内周縁の下端から缶軸を越えて反対側に延びて、内容物が十分に充填されているときは、この反対側の首部の内周面に交差することになる。すなわち、この水平線は上記延長線と重なり合う。 When the liquid content such as a beverage filled in such a bottle can is poured out from the lower end of the inner peripheral edge of the opening tilted by tilting the can body, the liquid level of the content is raised to the lower end of the inner peripheral edge of the opening. In a cross section extending horizontally from the can axis and extending vertically along the can axis, the liquid level extends from the lower end of the inner peripheral edge of the opening to the opposite side beyond the can axis while maintaining a horizontal line in contact with the inner peripheral edge of the opening. When the contents are sufficiently filled, they will intersect the inner peripheral surface of the neck on the opposite side. That is, this horizontal line overlaps with the extension line.

ここで、上記構成のボトル缶では、上記肩部の内周面は、上記延長線と、常に1点で交差し、または上記直線部が重なり合うように形成されているので、さらに缶本体を傾け続けて、この延長線(上記水平線)が缶本体に対して相対的に開口部の内周縁と接した状態を維持しつつ缶本体の下端側に回転することにより、首部の内周面から肩部の内周面に達し、さらに胴部の内周面に達するまでの間に、缶本体の内周面と液面との間に内容物が満たされる閉ざされた空間が形成されることがない。従って、金属製のボトル缶のように内部が見えない容器であっても、開口部に直接口をつけて飲むときの飲み心地が損なわれることがなく、またコップやグラスに飲料を注ぐときでも注ぎ出しがスムーズになる。 Here, in the bottle can having the above configuration, the inner peripheral surface of the shoulder portion is formed so as to always intersect the extension line at one point or to overlap the straight portion, so that the can body is further tilted. Subsequently, this extension line (the above horizontal line) rotates toward the lower end side of the can body while maintaining the state of being relatively in contact with the inner peripheral edge of the opening with respect to the can body, thereby causing the shoulder from the inner peripheral surface of the neck. By the time it reaches the inner peripheral surface of the can and further reaches the inner peripheral surface of the body, a closed space filled with the contents may be formed between the inner peripheral surface of the can body and the liquid surface. do not have. Therefore, even if the inside of the container is invisible, such as a metal bottle can, the drinking comfort will not be impaired when drinking with the mouth directly in the opening, and even when pouring the beverage into a cup or glass. The pouring becomes smooth.

すなわち、肩部の凹曲線部と凸曲線部とが互いに接して直接接続されている場合には、その接線が上記延長線と重なり合うようにすることにより、この延長線は缶本体の下端側に向かうに従い、凹曲線部に1点で交差しつつ下端側に向かい、凹曲線部と凸曲線部との接点においてこの接点における接線と重なって交差した後、凸曲線部と交差する。また、凹曲線部と凸曲線部とが曲折点を介して折れ曲がって直接接続されている場合でも、この曲折点における凹曲線部の缶本体上端側への接線と、曲折点における凸曲線部の缶本体上端への接線との間を通って上記曲折点に交差するようにすることにより、この延長線を凹曲線部と1点で交差した後、曲折点で首部の内周面と1点で交差し、さらに凸曲線部と1点で交差して延びるようにすることができる。 That is, when the concave curved portion and the convex curved portion of the shoulder portion are in contact with each other and are directly connected, the tangent line is overlapped with the extension line so that the extension line is on the lower end side of the can body. As it goes toward the lower end side while intersecting the concave curve portion at one point, it overlaps with the tangent line at this contact point at the contact point between the concave curve portion and the convex curve portion, and then intersects with the convex curve portion. Further, even when the concave curve portion and the convex curve portion are bent and directly connected via the bend point, the tangent line of the concave curve portion to the upper end side of the can body at this bend point and the convex curve portion at the bend point By crossing the bending point through the tangent to the upper end of the can body, this extension line intersects the concave curved portion at one point, and then the bending point intersects the inner peripheral surface of the neck at one point. It can be extended at one point and intersects with the convex curve portion.

さらに、凹曲線部と凸曲線部が直線部を介して接続されている場合に、この直線部が凹曲線部と凸曲線部に接するように形成されているときには、直線部を上記延長線と重なり合うようにすることにより、この延長線は凹曲線部と1点で交差するように延びた後、直線部と重なり合い、さらに凸曲線部と1点で交差して延びるようにすることができ、首部の内周面と液面との間に内容物が満たされる閉ざされた空間が形成されるのを防ぐことができる。また、こうして直線部が凹曲線部と凸曲線部に接するように形成されている場合や、直線部が凹曲線部および凸曲線部と曲折点を介して折れ曲がって接続されている場合でも、直線部と凹曲線部の曲折点を通る延長線と、直線部と凸曲線部の曲折点を通る延長線との間を、直線部に交差する延長線が延びるようにすることにより、やはり首部の内周面に延長線が常に1点で交差して延びるようにすることができる。 Further, when the concave curved portion and the convex curved portion are connected via the straight portion and the straight portion is formed so as to be in contact with the concave curved portion and the convex curved portion, the straight portion is referred to as the extension line. By overlapping, this extension line can be extended so as to intersect the concave curved portion at one point, then overlap with the straight portion, and further extend so as to intersect the convex curved portion at one point. It is possible to prevent the formation of a closed space filled with the contents between the inner peripheral surface of the neck and the liquid surface. Further, even when the straight line portion is formed so as to be in contact with the concave curve portion and the convex curve portion, or when the straight line portion is bent and connected to the concave curve portion and the convex curve portion via a bending point, the straight line portion is straight. By extending the extension line that intersects the straight line portion between the extension line that passes through the bend point of the portion and the concave curve portion and the extension line that passes through the bend point of the straight line portion and the convex curve portion, the extension line of the neck portion also extends. Extension lines can always intersect and extend at one point on the inner peripheral surface.

ここで、上記缶軸に沿った断面において、上記凹曲線部が凹円弧を描きつつ上記首部の下端から上記缶本体の下端外周側に向かっている場合には、この凹円弧の中心は、上記缶軸方向において上記開口部からの距離が30mm~50mmの範囲内に位置していることが望ましい。このようなボトル缶に充填された飲料を直接開口部から飲む場合は、肩部の凹曲線部に指をかけて缶本体を把持することが多いが、上記中心の位置が開口部から30mmよりも短いと指をかけ難く、また首部が短くなってデザイン性が損なわれる。一方、上記中心の位置が開口部から50mmよりも長いと缶本体の容量が少なくなるとともに、肩部がいわゆるなで肩状となってやはりデザイン性が損なわれる。 Here, in the cross section along the can axis, when the concave curved portion draws a concave arc and is directed from the lower end of the neck portion toward the outer peripheral side of the lower end of the can body, the center of the concave arc is the above. It is desirable that the distance from the opening is within the range of 30 mm to 50 mm in the can axis direction. When drinking a beverage filled in such a bottle can directly from the opening, the can body is often gripped by putting a finger on the concave curved portion of the shoulder, but the center position is 30 mm from the opening. If it is too short, it will be difficult to put your finger on it, and the neck will be short, which will impair the design. On the other hand, if the position of the center is longer than 50 mm from the opening, the capacity of the can body is reduced, and the shoulder portion becomes a so-called stroking shoulder shape, which also impairs the design.

また、上記首部は上端側に向かうに従い漸次縮径する上記缶軸を中心とした円錐面状に形成されるのが望ましく、首部上端の外径が同じであれば容量を多く確保することができる。なお、この場合には、上記缶軸に沿った断面において上記首部が上記缶軸に垂直な平面に対してなす傾斜角は70°~85°の範囲内とされるのが望ましく、85°よりも大きいと上述のように容量を確保することができず、また70°よりも小さいと肩部上端の外径が同じなら首部が短くなって肩部に指をかけ難くなるとともにデザイン性が損なわれる。 Further, it is desirable that the neck portion is formed in a conical surface shape centered on the can shaft whose diameter gradually decreases toward the upper end side, and if the outer diameter of the upper end portion of the neck portion is the same, a large capacity can be secured. .. In this case, it is desirable that the inclination angle formed by the neck portion with respect to the plane perpendicular to the can axis in the cross section along the can axis is within the range of 70 ° to 85 °, and is more than 85 °. If it is too large, the capacity cannot be secured as described above, and if it is smaller than 70 °, if the outer diameter of the upper end of the shoulder is the same, the neck becomes shorter and it becomes difficult to put a finger on the shoulder and the design is impaired. Is done.

以上説明したように、本発明によれば、缶本体を傾けたときに飲料等の液体の内容物の液面と肩部の凸曲線部の内面との間に閉ざされた空間が形成されるのを防いで、このような空間に残された内容物が、開口部に直接口をつけて飲料を飲むときやコップやグラスに飲料を注ぐときに吹き出すのを防ぐことができ、良好な飲み心地を確保するとともに、注ぎ出しをスムーズにして飲料がこぼれるような事態を防ぐことができる。 As described above, according to the present invention, when the can body is tilted, a closed space is formed between the liquid surface of the liquid content such as a beverage and the inner surface of the convex curved portion of the shoulder portion. It is possible to prevent the contents left in such a space from blowing out when drinking a beverage with the mouth directly in the opening or when pouring the beverage into a cup or glass, which is a good drink. It is possible to ensure comfort and smooth the pouring to prevent the beverage from spilling.

本発明の第1の実施形態を示す側面図である。It is a side view which shows the 1st Embodiment of this invention. 図1に示す実施形態の平面図である。It is a top view of the embodiment shown in FIG. 図1に示す実施形態の底面図である。It is a bottom view of the embodiment shown in FIG. 図1に示す実施形態の缶軸に沿った断面図である。FIG. 3 is a cross-sectional view taken along the can axis of the embodiment shown in FIG. 図4における缶本体の上端部の拡大断面図である。FIG. 4 is an enlarged cross-sectional view of the upper end portion of the can body in FIG. 本発明の第2の実施形態を示す側面図である。It is a side view which shows the 2nd Embodiment of this invention. 図6におけるA部分の拡大断面図である。It is an enlarged sectional view of the part A in FIG.

図1ないし図5は、本発明の第1の一実施形態を示すものである。本実施形態のボトル缶は、その缶本体1が図1および図4に示すように、底部2と、この底部2と一体に形成されて底部2の外周縁から上端側(図1および図4、図5において上側)に延びる外周部3とを備えた缶軸Cを中心とする概略多段の有底円筒状をなしている。外周部3の外径は例えば52mm~68mmの範囲とされ、底部2の下端から缶本体1の上端までの缶高さは例えば100mm~170mmの範囲とされる。 1 to 5 show a first embodiment of the present invention. In the bottle can of the present embodiment, as shown in FIGS. 1 and 4, the can body 1 is formed integrally with the bottom portion 2 and the bottom portion 2, and is formed from the outer peripheral edge of the bottom portion 2 to the upper end side (FIGS. 1 and 4). , The upper side in FIG. 5) has a substantially multi-stage bottomed cylinder centered on the can shaft C having the outer peripheral portion 3. The outer diameter of the outer peripheral portion 3 is, for example, in the range of 52 mm to 68 mm, and the can height from the lower end of the bottom portion 2 to the upper end of the can body 1 is, for example, in the range of 100 mm to 170 mm.

底部2には、缶軸C方向の内側(缶本体1の上端側)に凹む断面略円弧状のドーム部2aが中央に形成されるとともに、このドーム部2aの外周には缶軸C方向の外側(缶本体1の下端側)に突出する環状凸部2bが缶軸C回りの周方向に連続して形成されている。また、外周部3には底部2から缶本体1の上端側の開口部4に向けて順に、缶軸Cを中心とした円筒状の胴部5と、上端側に向かうに従い漸次縮径する肩部6と、この肩部6からさらに上端側に向かうに従い漸次縮径する円錐面状の首部7と、本実施形態では首部7の上端から外周側に張り出す膨出部8aおよび雄ネジ部8b、カール部8cを備えたキャップ取付部8とが形成されている。 A dome portion 2a having a substantially arcuate cross section recessed inward in the can axis C direction (upper end side of the can body 1) is formed in the center of the bottom portion 2, and the outer periphery of the dome portion 2a is formed in the can axis C direction. An annular convex portion 2b protruding outward (on the lower end side of the can body 1) is continuously formed in the circumferential direction around the can axis C. Further, the outer peripheral portion 3 has a cylindrical body portion 5 centered on the can shaft C in order from the bottom portion 2 toward the opening 4 on the upper end side of the can body 1, and a shoulder whose diameter gradually decreases toward the upper end side. A portion 6, a conical neck portion 7 whose diameter is gradually reduced toward the upper end side from the shoulder portion 6, and a bulging portion 8a and a male screw portion 8b protruding from the upper end of the neck portion 7 to the outer peripheral side in the present embodiment. , A cap mounting portion 8 having a curl portion 8c is formed.

このようなボトル缶を製造するには、まずカッピングプレス機によるカッピングプレス工程においてアルミニウムまたはアルミニウム合金等の金属板を円板状に打ち抜いて絞り加工を施すことにより深さの浅いカップ状素材を製造する。次いで、このカップ状素材にDIプレス機によるDIプレス工程において再絞りおよびしごき加工を施して缶軸C方向に延伸することにより、底部2に上記ドーム部2aと環状凸部2bが形成された有底円筒体(DI缶)を成形する。 In order to manufacture such a bottle can, first, in the cupping press process using a cupping press machine, a metal plate such as aluminum or an aluminum alloy is punched into a disk shape and drawn to produce a cup-shaped material having a shallow depth. do. Next, the cup-shaped material was re-squeezed and ironed in a DI pressing process using a DI press machine to be stretched in the can axis C direction, whereby the dome portion 2a and the annular convex portion 2b were formed on the bottom portion 2. Mold the bottom cylinder (DI can).

カッピングプレス工程においてカップ状素材に成形される金属板は、本実施形態では元板厚が0.285mm~0.500mmのJIS H 4000におけるA3004またはA3104のアルミニウム合金板である。また、このカップ状素材から成形される有底円筒体には、外周部に上記缶軸Cを中心とした円筒部が形成され、この円筒部の外径は缶本体1の胴部5の外径と略等しい一定外径である。 In the present embodiment, the metal plate formed into the cup-shaped material in the cupping press process is an aluminum alloy plate of A3004 or A3104 in JIS H 4000 having a base plate thickness of 0.285 mm to 0.500 mm. Further, in the bottomed cylindrical body formed from this cup-shaped material, a cylindrical portion centered on the can shaft C is formed on the outer peripheral portion, and the outer diameter of this cylindrical portion is the outside of the body portion 5 of the can body 1. It has a constant outer diameter that is almost equal to the diameter.

このように成形された有底円筒体は、第1の洗浄工程において洗浄、乾燥され、次いで塗装工程において内外面に塗装が施されて焼き付けられる。そして、塗装が施された有底円筒体は、ボトルネッカーによるボトルネック成形工程において、円筒部の上端側部分の下端側が金型によって縮径されて上記肩部6と首部7が成形され、次いで首部7の上端側が拡径工具によって拡径されて上記膨出部8aが形成されるとともに、この膨出部8aよりもさらに上端側にねじ切り加工が施されて上記雄ネジ部8bが形成された後、雄ネジ部8bよりも上端側が外周側に折り返されてカールされてからスロットル加工によって潰されてカール部8cが形成されてキャップ取付部8が成形され、図1ないし図5に示したようなボトル缶の缶本体1に成形される。 The bottomed cylinder thus formed is washed and dried in the first washing step, and then the inner and outer surfaces are painted and baked in the painting step. Then, in the bottleneck forming step of the painted bottomed cylinder, the lower end side of the upper end side portion of the cylindrical portion is reduced in diameter by the mold to form the shoulder portion 6 and the neck portion 7, and then the neck portion 7 is formed. The upper end side of the neck portion 7 is expanded by a diameter-expanding tool to form the bulging portion 8a, and the upper end side of the bulging portion 8a is further threaded to form the male screw portion 8b. Later, the upper end side of the male screw portion 8b is folded back to the outer peripheral side and curled, and then crushed by throttle processing to form the curled portion 8c and the cap mounting portion 8 is formed, as shown in FIGS. 1 to 5. It is molded into the can body 1 of a simple bottle can.

こうして成形された缶本体1は、第2の洗浄工程によって洗浄、乾燥された後に、検査工程においてピンホールの有無や外面の異物付着、傷、汚れ、印刷不良等が検査されて飲料工場等に搬送され、飲料等の内容物が充填された後に、開口部4を覆ってキャップ取付部8のカール部8cから雄ネジ部8bおよび膨出部8aにかけて図示されないキャップが取り付けられて封止され、出荷される。なお、缶本体1の上記各工程の間には、有底円筒体の上端縁を切断するトリミングや、必要に応じて底部の環状凸部2bの断面形状を再成形するボトムリフォームが行われる。 The can body 1 thus molded is washed and dried by the second washing step, and then inspected for the presence or absence of pinholes, foreign matter adhesion on the outer surface, scratches, stains, printing defects, etc. in the inspection step, and then sent to a beverage factory or the like. After being transported and filled with contents such as beverages, a cap (not shown) is attached and sealed from the curl portion 8c of the cap mounting portion 8 to the male screw portion 8b and the bulging portion 8a so as to cover the opening 4. Will be shipped. During each of the above steps of the can body 1, trimming is performed to cut the upper end edge of the bottomed cylinder, and bottom reform is performed to reshape the cross-sectional shape of the annular convex portion 2b at the bottom, if necessary.

ここで、上記肩部6は、缶軸Cに沿った断面において図4および図5に示すように、本実施形態では、胴部5の上端において該胴部5に接し、缶本体1の外周側に膨らむ凸曲線を描きつつ胴部5から上端側に向かって延びる凸曲線部6aと、この凸曲線部6aの上端に接して直線状に缶本体1の上端側に向かうに従い内周側に向かって延びる直線部6bと、この直線部6bの上端に接して缶本体1の内周側に凹む凹曲線を描きつつ上端側に向かうに従い内周側に向かって延びる凹曲線部6cとにより形成されている。 Here, as shown in FIGS. 4 and 5 in a cross section along the can axis C, the shoulder portion 6 is in contact with the body portion 5 at the upper end of the body portion 5 and is in contact with the body portion 5 and is the outer periphery of the can body 1. The convex curve portion 6a extending from the body portion 5 toward the upper end side while drawing a convex curve bulging sideways, and the convex curve portion 6a in contact with the upper end of the convex curve portion 6a and linearly toward the upper end side of the can body 1 toward the inner peripheral side. It is formed by a straight line portion 6b extending toward the upper end and a concave curve portion 6c extending toward the inner peripheral side toward the upper end side while drawing a concave curve that is in contact with the upper end of the straight line portion 6b and is recessed toward the inner peripheral side of the can body 1. Has been done.

そして、缶軸Cに沿った断面において、開口部4の内周縁に接して缶本体1の内周側に向かうに従い下端側に延び、缶軸Cを越えて開口部4の内周縁との接点Lとは反対側の首部7の内周面に交差する延長線Mを想定し、この延長線Mを、開口部4の内周縁と接した状態を維持しつつ缶本体1の下端側に回転させたとき、肩部6の内周面は、上記延長線Mと、常に1点で交差し、または上記直線部6bが重なり合うように形成されている。ここで、本実施形態おいては、図5に示すように、上記直線部6bが延長線Mと重なり合うように形成されている。従って、肩部6の凸曲線部6aの内面は、缶軸Cに沿った断面において、上記延長線Mよりも外周側にはみ出すことはなく、すなわち凸曲線部6aの内面が開口部4内周縁を通り缶軸Cを越えて肩部6の内面に接する直線よりも外周側にはみ出すことはない。 Then, in the cross section along the can shaft C, it is in contact with the inner peripheral edge of the opening 4 and extends toward the lower end side toward the inner peripheral side of the can body 1, and extends beyond the can shaft C to the inner peripheral edge of the opening 4. Assuming an extension line M that intersects the inner peripheral surface of the neck portion 7 on the opposite side of L, the extension line M is rotated to the lower end side of the can body 1 while maintaining a state of being in contact with the inner peripheral edge of the opening 4. The inner peripheral surface of the shoulder portion 6 is formed so as to always intersect the extension line M at one point or to overlap the straight portion 6b. Here, in the present embodiment , as shown in FIG. 5, the straight line portion 6b is formed so as to overlap with the extension line M. Therefore, the inner surface of the convex curved portion 6a of the shoulder portion 6 does not protrude to the outer peripheral side of the extension line M in the cross section along the can axis C, that is, the inner surface of the convex curved portion 6a is the inner peripheral edge of the opening 4. It does not protrude to the outer peripheral side of the straight line that passes through the can axis C and touches the inner surface of the shoulder portion 6.

なお、本実施形態では、缶軸Cに沿った断面において、上記凹曲線部6cは凹円弧を描きつつ上端側に向かっており、この凹円弧の中心O1は缶軸C方向において開口部4からの距離N1が30mm~50mmの範囲内とされており、さらにこの凹円弧の半径R1は10mm~30mmの範囲とされている。また、肩部6の凸曲線部6aも凸円弧を描いていて、この凸円弧の中心O2は缶軸C方向において開口部4からの距離N2が55mm~75mmの範囲内とされており、さらにこの凸円弧の半径R2は10mm~30mmの範囲とされている。 In the present embodiment, in the cross section along the can axis C, the concave curved portion 6c is directed toward the upper end side while drawing a concave arc, and the center O1 of the concave arc is from the opening 4 in the can axis C direction. The distance N1 is in the range of 30 mm to 50 mm, and the radius R1 of this concave arc is in the range of 10 mm to 30 mm. Further, the convex curved portion 6a of the shoulder portion 6 also draws a convex arc, and the center O2 of the convex arc has a distance N2 from the opening 4 in the range of 55 mm to 75 mm in the can axis C direction. The radius R2 of this convex arc is in the range of 10 mm to 30 mm.

さらに、首部7は上端側に向かうに従い漸次縮径する円錐面状に形成されており、この首部7が同じく缶軸Cに沿った断面において缶軸Cに垂直な平面Pに対してなす傾斜角θ1は70°~85°の範囲内とされている。さらにまた、肩部6の直線部6bが缶軸Cに沿った断面において缶軸Cに垂直な平面Pに対してなす傾斜角θ2は45°~70°の範囲内とされている。また、開口部4の内径(直径)Dは、例えば20mm~40mmの範囲とされる。 Further, the neck portion 7 is formed in a conical surface shape that gradually shrinks in diameter toward the upper end side, and the inclination angle formed by the neck portion 7 with respect to the plane P perpendicular to the can axis C in the cross section also along the can axis C. θ1 is in the range of 70 ° to 85 °. Furthermore, the inclination angle θ2 formed by the straight line portion 6b of the shoulder portion 6 with respect to the plane P perpendicular to the can axis C in the cross section along the can axis C is within the range of 45 ° to 70 °. The inner diameter (diameter) D of the opening 4 is, for example, in the range of 20 mm to 40 mm.

このような本実施形態のボトル缶において、缶本体1に充填された飲料等の液体の内容物は、開口部4に口を付けて直接飲んだり、コップやグラスに注いで飲んだりする際に缶本体1を傾け始めると、缶軸Cに沿った断面においては、その液面が開口部4の傾いた内周縁の下端から水平線をなして延び、この水平線は缶軸Cを越えて例えば首部7の内周面と交差し、さらに缶本体1を傾けると肩部6の凹曲線部6cの内面の上端に達する。すなわち、この水平線は上記延長線Mと重なり合う。そして、続けて缶本体1を傾けると、延長線M(水平線)と肩部6の凹曲線部6c内面との交点は、凹曲線部6cに沿って移動して、この凹曲線部6cの下端、すなわち凹曲線部6cと直線部6bとの接点に達する。 In such a bottle can of the present embodiment, when the liquid content such as a beverage filled in the can body 1 is directly drunk with the opening 4 attached, or when it is poured into a cup or a glass and drunk. When the can body 1 begins to be tilted, in the cross section along the can axis C, the liquid level extends from the lower end of the inclined inner peripheral edge of the opening 4 in a horizontal line, and this horizontal line extends beyond the can axis C, for example, the neck portion. When it intersects the inner peripheral surface of 7 and the can body 1 is further tilted, it reaches the upper end of the inner surface of the concave curved portion 6c of the shoulder portion 6. That is, this horizontal line overlaps with the extension line M. Then, when the can body 1 is continuously tilted, the intersection of the extension line M (horizontal line) and the inner surface of the concave curved portion 6c of the shoulder portion 6 moves along the concave curved portion 6c, and the lower end of the concave curved portion 6c. That is, it reaches the point of contact between the concave curved portion 6c and the straight portion 6b.

ここで、本実施形態では、上述のように延長線M(水平線)は凹曲線部6cの下端に達したところで直線部6bと重なり合い、同時に直線部6bの下端、すなわち凸曲線部6aの上端における凸曲線部6aと直線部6bとの接点に達する。従って、凸曲線部6aが直線部6bと接していて、延長線Mよりも外周側にはみ出すことがないため、上記水平線が凸曲線部6aと直線部6bと重なり合ったところで、凸曲線部6aは上記水平線の缶本体1下端側への延長線である上記延長線Mよりも下方に位置することになる。 Here, in the present embodiment, as described above, the extension line M (horizontal line) overlaps with the straight line portion 6b when it reaches the lower end of the concave curved line portion 6c, and at the same time, at the lower end of the straight line portion 6b, that is, at the upper end of the convex curved line portion 6a. It reaches the point of contact between the convex curved portion 6a and the straight portion 6b. Therefore, since the convex curve portion 6a is in contact with the straight line portion 6b and does not protrude from the extension line M on the outer peripheral side, the convex curve portion 6a is formed when the horizontal line overlaps the convex curve portion 6a and the straight line portion 6b. The horizontal line is located below the extension line M, which is an extension line toward the lower end side of the can body 1.

このため、この凸曲線部6aの内面と液面の開口部4とは反対側への延長面との間に内容物が残されて満たされた空間が形成されることもないので、そのまま缶本体1を傾け続けても、内容物が吹き出すことはない。従って、上記構成のボトル缶によれば、アルミニウム合金等の金属製のボトル缶のように内部が見えない容器であっても、飲料等の内容物を開口部4に直接口をつけて飲むときの飲み心地が損なわれるようなことはなく、またコップやグラスに注ぐときの注ぎ出しをスムーズにして内容物がこぼれるような事態を防止することができる。 Therefore, no space is formed between the inner surface of the convex curved portion 6a and the extension surface of the liquid surface to the opposite side of the opening 4, so that the contents cannot be left and a filled space is not formed. Even if the main body 1 is continuously tilted, the contents do not blow out. Therefore, according to the bottle can having the above configuration, even if the inside is invisible like a metal bottle can such as an aluminum alloy, when the contents of a beverage or the like are drunk with the mouth directly attached to the opening 4. The drinking comfort is not impaired, and the pouring when pouring into a cup or glass can be made smooth to prevent the contents from spilling.

なお、本実施形態では、肩部6の凸曲線部6aと凹曲線部6cとの間に、これら凸曲線部6aの上端と凹曲線部6cの下端において凸曲線部6aと凹曲線部6cとに接する直線部6bが設けられているが、本発明の参考例では、凸曲線部6aと凹曲線部6cとが、これら凸曲線部6aの上端と凹曲線部6cの下端で互いに直接接するようにして接続されていてもよい。この場合には、これら凸曲線部6aの上端と凹曲線部6cの下端における凸曲線部6aと凹曲線部6cとの接線において上記延長線Mが交差するように延びていればよく、すなわち肩部6の内周面は、上記延長線Mと常に1点で交差することになる。 In the present embodiment, between the convex curve portion 6a and the concave curve portion 6c of the shoulder portion 6, the convex curve portion 6a and the concave curve portion 6c are formed at the upper end of the convex curve portion 6a and the lower end of the concave curve portion 6c. In the reference example of the present invention, the convex curve portion 6a and the concave curve portion 6c are in direct contact with each other at the upper end of the convex curve portion 6a and the lower end of the concave curve portion 6c. It may be connected with. In this case, the extension line M may extend so as to intersect at the tangent line between the convex curve portion 6a and the concave curve portion 6c at the upper end of the convex curve portion 6a and the lower end of the concave curve portion 6c, that is, the shoulder. The inner peripheral surface of the portion 6 always intersects the extension line M at one point.

また、本実施形態では、上記缶軸Cに沿った断面において、凹曲線部6cが凹円弧を描きつつ上端側に向かっており、この凹円弧の中心O1が、缶軸C方向において上記開口部4からの距離N1が30mm~50mmの範囲内とされているので、缶本体1の容量を確保しつつ、缶本体1を把持するときの把持性や缶本体1のデザイン性を向上させることができる。すなわち、凹曲線部6cの上記中心O1の位置が開口部4から30mmよりも短いと、凹曲線部6cに指をかけて缶本体1を把持しようとしたときに、指をかけ難くなって把持性が悪くなるとともに、首部7が短くなってデザイン性が損なわれる。逆に、上記中心O1の位置が開口部4から50mmよりも長いと、缶本体1の容量が少なくなるとともに、肩部6がなで肩状となってやはりデザイン性が損なわれる。 Further, in the present embodiment, in the cross section along the can axis C, the concave curved portion 6c is directed toward the upper end side while drawing a concave arc, and the center O1 of the concave arc is the opening in the can axis C direction. Since the distance N1 from 4 is within the range of 30 mm to 50 mm, it is possible to improve the gripping property when gripping the can body 1 and the design of the can body 1 while securing the capacity of the can body 1. can. That is, if the position of the center O1 of the concave curved portion 6c is shorter than 30 mm from the opening 4, it becomes difficult to hold the can body 1 by putting a finger on the concave curved portion 6c. As the sex becomes worse, the neck 7 becomes shorter and the design is impaired. On the contrary, when the position of the center O1 is longer than 50 mm from the opening 4, the capacity of the can body 1 is reduced, and the shoulder portion 6 is stroked to form a shoulder shape, which also impairs the design.

さらに、本実施形態では、首部7が缶本体1の上端側に向かうに従い漸次縮径する円錐面状に形成されており、この首部7が缶軸Cに沿った断面において缶軸Cに垂直な平面Pに対してなす傾斜角θ1は70°~85°の範囲内とされているので、やはり缶本体1の容量を確保しつつ、缶本体1の把持性やデザイン性の向上を図ることができる。すなわち、傾斜角θ1が85°よりも大きいと、缶本体1の容量を十分に確保することができず、また傾斜角θ1が70°よりも小さいと、肩部6の上端(凹曲線部6cの上端)の外径が同じなら首部7が短くなって肩部6に指をかけ難くなるとともに缶本体1が寸詰まりとなってデザイン性が損なわれる。 Further, in the present embodiment, the neck portion 7 is formed in a conical surface shape in which the diameter gradually decreases toward the upper end side of the can body 1, and the neck portion 7 is perpendicular to the can axis C in a cross section along the can axis C. Since the inclination angle θ1 with respect to the plane P is within the range of 70 ° to 85 °, it is possible to improve the grip and design of the can body 1 while still securing the capacity of the can body 1. can. That is, if the inclination angle θ1 is larger than 85 °, the capacity of the can body 1 cannot be sufficiently secured, and if the inclination angle θ1 is smaller than 70 °, the upper end of the shoulder portion 6 (concave curved portion 6c). If the outer diameter of the upper end) is the same, the neck portion 7 becomes shorter and it becomes difficult to put a finger on the shoulder portion 6, and the can body 1 becomes clogged and the design is impaired.

次に、図6および図7は、本発明の第2の実施形態を示すものであり、第1の実施形態と共通する部分には同一の符号を配してある。上記第1の実施形態では、肩部6の内周面において直線部6bが延長線Mと重なり合っていたのに対し、この第2の実施形態では、直線部6bも延長線Mと常に1点で交差していることを特徴とする。すなわち、直線部6bは、凸曲線部6aおよび凹曲線部6cとその接線として接してはおらず、これら凸曲線部6aの上端における接線および凹曲線部6cの下端における接線と角度をもって曲折している。 Next, FIGS. 6 and 7 show the second embodiment of the present invention, and the same reference numerals are given to the parts common to the first embodiment. In the first embodiment, the straight line portion 6b overlaps the extension line M on the inner peripheral surface of the shoulder portion 6, whereas in the second embodiment, the straight line portion 6b also always has one point with the extension line M. It is characterized by intersecting at. That is, the straight portion 6b is not in contact with the convex curve portion 6a and the concave curve portion 6c as a tangent line thereof, but is bent at an angle with the tangent line at the upper end of the convex curve portion 6a and the tangent line at the lower end of the concave curve portion 6c. ..

ここで、缶軸Cに沿った断面において、上記開口部4の内周縁に接点Lで接して缶本体1の内周側に向かうに従い下端側に延び、缶軸Cを越えて開口部4の内周縁との接点Lとは反対側の缶本体1の内周面に凹曲線部6cと直線部6bとの曲折点Q1で交差する延長線M1は、図7に示すように凸曲線部6aと直線部6bとの曲折点Q2で交差する延長線M2よりも缶本体1の上端側を通るように延びており、直線部6bに交差する延長線M(図示略)は、これらの延長線M1、M2の間を通るように延びる。 Here, in the cross section along the can shaft C, the contact L contacts the inner peripheral edge of the opening 4 and extends toward the lower end side toward the inner peripheral side of the can main body 1, and extends beyond the can shaft C to the opening 4. As shown in FIG. 7, the extension line M1 that intersects the inner peripheral surface of the can body 1 on the side opposite to the contact point L with the inner peripheral edge at the bending point Q1 between the concave curved portion 6c and the straight portion 6b is the convex curved portion 6a. The extension line M (not shown) that extends so as to pass through the upper end side of the can body 1 from the extension line M2 that intersects with the straight portion 6b at the bending point Q2, is an extension line M (not shown). It extends so as to pass between M1 and M2.

従って、本実施形態では、延長線M、M1、M2は、肩部6の内周面と常に1点で交差するように延び、肩部6の内周面が延長線M、M1、M2よりも外周側にはみ出すことがないので、やはり凸曲線部6aの内面と液面の開口部4とは反対側への延長面との間に内容物が残されて満たされた空間が形成されることもなく、缶本体1を傾け続けても内容物が吹き出すことはない。 Therefore, in the present embodiment, the extension lines M, M1 and M2 extend so as to always intersect the inner peripheral surface of the shoulder portion 6 at one point, and the inner peripheral surface of the shoulder portion 6 extends from the extension lines M, M1 and M2. However, since it does not protrude to the outer peripheral side, a filled space is formed in which the contents are left between the inner surface of the convex curved portion 6a and the extension surface to the side opposite to the opening 4 of the liquid surface. Even if the can body 1 is continuously tilted, the contents will not blow out.

なお、この第2の実施形態の参考例のように凸曲線部6aと凹曲線部6cとが直線部6bを介さずに、曲折点を介して折れ曲がって直接接続されているような場合でも、延長線Mを、この曲折点における凹曲線部6cの下端における缶本体1下端側への接線と、この曲折点における凸曲線部6aの上端における缶本体1上端への接線との間を通って該曲折点に交差するようにすることにより、この延長線Mを凹曲線部6cと1点で交差した後、曲折点でも1点で交差して、さらに凸曲線部6aとも1点で交差して延びるようにすることができ、すなわち肩部6の内周面と延長面Mとを常に1点で交差するようにできる。 Even when the convex curved portion 6a and the concave curved portion 6c are bent and directly connected via the bending point without passing through the straight portion 6b as in the reference example of the second embodiment. The extension line M passes between the tangent line to the lower end side of the can body 1 at the lower end of the concave curved portion 6c at this bending point and the tangent line to the upper end of the can body 1 at the upper end of the convex curved portion 6a at this bending point. By intersecting the bending point, the extension line M intersects the concave curved portion 6c at one point, then intersects at the bending point at one point, and further intersects with the convex curved portion 6a at one point. That is, the inner peripheral surface of the shoulder portion 6 and the extension surface M can always intersect at one point.

1 缶本体
2 底部
3 外周部
4 開口部
5 胴部
6 肩部
6a 凸曲線部
6b 直線部
6c 凹曲線部
7 首部
8 キャップ取付部
C 缶軸
L 開口部4の内周縁への延長線M、M1、M2の接点
M、M1、M2 缶軸Cに沿った断面において、開口部4の内周縁に接して缶本体1の内周側に向かうに従い下端側に延び、缶軸Cを越えて開口部4の内周縁との接点Lとは反対側の肩部6の内周面に交差する延長線
O1 凹曲線部6cがなす円弧の中心
O2 凸曲線部6aがなす円弧の中心
N1 開口部4から中心O1までの缶軸C方向の距離
N2 開口部4から中心O2までの缶軸C方向の距離
θ1 首部7が缶軸Cに沿った断面において缶軸Cに垂直な平面Pに対してなす傾斜角
θ2 直線部6bが缶軸Cに沿った断面において缶軸Cに垂直な平面Pに対してなす傾斜角
D 開口部4の内径(直径)
Q1 凹曲線部6cと直線部6bとの曲折点
Q2 凸曲線部6aと直線部6bとの曲折点
1 Can body 2 Bottom part 3 Outer part 4 Opening part 5 Body part 6 Shoulder part 6a Convex curved part 6b Straight part 6c Concave curved part 7 Neck part 8 Cap mounting part C Can shaft L Extension line M to the inner peripheral edge of opening 4 Contact points of M1 and M2 M, M1 and M2 In the cross section along the can axis C, the contact extends toward the lower end side toward the inner peripheral side of the can body 1 in contact with the inner peripheral edge of the opening 4, and opens beyond the can axis C. Extension line crossing the inner peripheral surface of the shoulder portion 6 on the side opposite to the contact point L with the inner peripheral edge of the portion 4 O1 Center of the arc formed by the concave curved portion 6c O2 Center of the arc formed by the convex curved portion 6a N1 Opening portion 4 Distance from the center O1 in the can axis C direction N2 Distance from the opening 4 to the center O2 in the can axis C direction θ1 The neck portion 7 is formed with respect to the plane P perpendicular to the can axis C in the cross section along the can axis C. Inclination angle θ2 Inclination angle formed by the straight line portion 6b with respect to the plane P perpendicular to the can axis C in the cross section along the can axis C. D Inner diameter (diameter) of the opening 4.
Q1 Bending point between the concave curved portion 6c and the straight portion 6b Q2 Bending point between the convex curved portion 6a and the straight portion 6b

Claims (3)

缶軸を中心とする有底筒状の缶本体の胴部から上端側に向かうに従い縮径する肩部と、この肩部からさらに上端側に向かって延びる首部と、この首部の上端側に設けられて上端に開口部を備えたキャップ取付部とを有する金属製のボトル缶であって、
上記肩部は、上記缶軸に沿った断面において、上記胴部の上端から上記缶本体の外周側に膨らむ凸曲線を描きつつ上端内周側に向かう凸曲線部と、上記首部の下端から上記缶本体の内周側に凹む凹曲線を描きつつ下端外周側に向かう凹曲線部とを備え、
上記凸曲線部の上端と上記凹曲線部の下端とは、上記缶本体の上端側に向かうに従い内周側に向かう直線部を介して接続されており、
上記缶軸に沿った断面において、上記開口部の内周縁に接して上記缶本体の内周側に向かうに従い下端側に延び、上記缶軸を越えて上記開口部の内周縁との接点とは反対側の上記首部の内周面に交差する延長線を想定し、
この延長線を、上記開口部の内周縁と接した状態を維持しつつ上記缶本体の下端側に回転させたとき、
上記肩部の内周面は、上記延長線と、常に1点で交差し、または上記直線部が重なり合うように形成され
上記直線部が上記延長線と1点で交差し、または重なり合ったとき、上記凸曲線部の内面は、上記缶軸に沿った断面において、上記延長線よりも外周側にはみ出すことがないことを特徴とするボトル缶。
A shoulder portion whose diameter is reduced from the body of the bottomed tubular can body centered on the can shaft toward the upper end side, a neck portion extending further toward the upper end side from this shoulder portion, and an upper end side of the neck portion are provided. A metal bottle can having a cap attachment with an opening at the top.
The shoulder portion has a convex curve portion extending toward the inner peripheral side of the upper end while drawing a convex curve swelling from the upper end of the body portion to the outer peripheral side of the can body in a cross section along the can axis, and the shoulder portion from the lower end portion of the neck portion. It is equipped with a concave curve portion that goes toward the outer peripheral side of the lower end while drawing a concave curve that is recessed on the inner peripheral side of the can body.
The upper end of the convex curve portion and the lower end of the concave curve portion are connected via a straight line portion toward the inner peripheral side toward the upper end side of the can body.
In the cross section along the can shaft, the contact point with the inner peripheral edge of the opening beyond the can shaft extends toward the lower end side toward the inner peripheral side of the can body in contact with the inner peripheral edge of the opening. Assuming an extension line that intersects the inner peripheral surface of the above neck on the opposite side,
When this extension line is rotated toward the lower end side of the can body while maintaining the state of being in contact with the inner peripheral edge of the opening,
The inner peripheral surface of the shoulder portion is formed so as to always intersect with the extension line at one point or to overlap the straight portion .
When the straight line portion intersects or overlaps with the extension line at one point, the inner surface of the convex curve portion does not protrude to the outer peripheral side of the extension line in the cross section along the can axis. A characteristic bottle can.
上記缶軸に沿った断面において、上記凹曲線部は凹円弧を描きつつ上記首部の下端から上記缶本体の下端外周側に向かっており、
この凹円弧の中心が、上記缶軸方向において上記開口部からの距離が30mm~50mmの範囲内に位置していることを特徴とする請求項1に記載のボトル缶。
In the cross section along the can axis, the concave curved portion draws a concave arc and is directed from the lower end of the neck portion toward the outer peripheral side of the lower end of the can body.
The bottle can according to claim 1, wherein the center of the concave arc is located within a range of 30 mm to 50 mm from the opening in the can axis direction.
上記首部は上端側に向かうに従い漸次縮径する上記缶軸を中心とした円錐面状に形成されており、
上記缶軸に沿った断面において上記首部が上記缶軸に垂直な平面に対してなす傾斜角が70°~85°の範囲内であることを特徴とする請求項1または請求項2に記載のボトル缶。
The neck portion is formed in a conical surface shape centered on the can shaft, which gradually shrinks in diameter toward the upper end side.
The first or second aspect of the present invention, wherein the inclination angle formed by the neck portion with respect to the plane perpendicular to the can axis in the cross section along the can axis is within the range of 70 ° to 85 °. Bottle can.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003165539A (en) 2001-11-29 2003-06-10 Daiwa Can Co Ltd Bottle-shaped can for beverage
JP2007153376A (en) 2005-12-02 2007-06-21 Daiwa Can Co Ltd Small-capacity threaded can made of aluminium alloy
US20080011702A1 (en) 2006-07-12 2008-01-17 Rexam Beverage Can Company Necked-in can body and method for making same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003165539A (en) 2001-11-29 2003-06-10 Daiwa Can Co Ltd Bottle-shaped can for beverage
JP2007153376A (en) 2005-12-02 2007-06-21 Daiwa Can Co Ltd Small-capacity threaded can made of aluminium alloy
US20080011702A1 (en) 2006-07-12 2008-01-17 Rexam Beverage Can Company Necked-in can body and method for making same

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