JP7494860B2 - Bottle cans and bottle containers - Google Patents

Bottle cans and bottle containers Download PDF

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JP7494860B2
JP7494860B2 JP2021563756A JP2021563756A JP7494860B2 JP 7494860 B2 JP7494860 B2 JP 7494860B2 JP 2021563756 A JP2021563756 A JP 2021563756A JP 2021563756 A JP2021563756 A JP 2021563756A JP 7494860 B2 JP7494860 B2 JP 7494860B2
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bottle
mouth
outer diameter
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cap
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JPWO2021117317A1 (en
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健 村瀬
俊幸 長谷川
章太 田中
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Toyo Seikan Group Holdings Ltd
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Toyo Seikan Kaisha Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/40—Details of walls
    • B65D1/42—Reinforcing or strengthening parts or members
    • B65D1/46—Local reinforcements, e.g. adjacent closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Discharge Of Articles From Conveyors (AREA)
  • Closures For Containers (AREA)

Description

本発明は、口部において、ねじ部の下方にスクリューキャップの裾部が係止される係止部を有するボトル缶およびボトル容器に関するものである。 The present invention relates to a bottle can and a bottle container having a locking portion at the mouth below the threaded portion to lock the bottom of the screw cap.

飲料用容器として用いられている金属製のボトル缶は、缶胴および缶底を有し、缶胴の開口部に缶胴よりも小径の口部を有し、口部にはねじ部が成形されており、この口部に再栓可能なスクリューキャップが装着されたボトル容器として普及している。一般的に、このようなボトル缶は、アルミニウム、アルミニウム合金、スチール等の金属材料からなる原板を円形状に打ち抜き、それを絞り加工して有底円筒状のカップ成形体を得、更にそれを絞り・しごき加工（ＤＩ成形）して有底円筒状の缶体を得た後、ネッキング工程においてテーパー状に縮径した肩部および円筒状の口部を形成し、その後に、ねじ加工などを含む口部の成形を行うことにより、製造される。Metal bottle cans used as beverage containers have a can body and a can bottom, a mouth at the opening of the can body that is smaller in diameter than the can body, a screw thread is formed at the mouth, and a resealable screw cap is attached to the mouth. These bottle cans are generally manufactured by punching out a blank made of a metal material such as aluminum, aluminum alloy, or steel into a circular shape, drawing the blank to obtain a cylindrical cup body with a bottom, drawing and ironing the blank to obtain a cylindrical can body with a bottom, forming a tapered shoulder and a cylindrical mouth in a necking process, and then forming the mouth, including threading.

このようなボトル缶の口部には、図１に示されるように、雄ねじ形状を有するねじ部１１０が形成され、ねじ部１１０の下方には、径方向外方に膨出するスカート部１３０を有する係止部１２０が缶軸周りの全周にわたって環状に形成されている。係止部１２０は、ブリッジ付きスクリューキャップ（以下、単に「キャップ」という。）１５０の裾部１５３がロールオン成形される部分であり、膨出形状のスカート部１３０の下方に径方向内方に縮径するビード部１４０を有して径方向内方に屈曲されるキャップ１５０の裾部１５３を係止することができる形状とされている。
このようなボトル缶１００においては、その内部に飲料等の内容物が充填された後、キャッピング工程において口部１０１にキャップ１５０が捲き締められる。具体的には、口部１０１に有頂筒状のキャップ１５０を被せ、このキャップ１５０に下方に向かう荷重をかけてボトル缶１００内を密封状態とし、この密封状態を維持しながらキャップ１５０の周壁部１５２の上部に対して、ねじ部１１０に対応する高さ位置にスレッドローラーを径方向内方に押し当てながら缶軸回りの周方向に転動させることにより、キャップ１５０の周壁部１５２にねじ部１１０の雄ねじ形状に適合する雌ねじ形状を成形し、また、キャップ１５０の周壁部１５２の下端に対して、スカート部１３０とビード部１４０とに対向する高さ位置にスカートローラーにより径方向内方に荷重を付与しながら缶軸回りの全周に転動させてキャップ１５０の裾部１５３をロールオン成形し、これにより、キャップ１５０の裾部１５３がスカート部１３０およびビード部１４０に密着して係止される（例えば特許文献１参照。）。 1, a threaded portion 110 having a male thread shape is formed at the mouth of such a bottle-can, and a locking portion 120 having a skirt portion 130 bulging outward in the radial direction is formed in an annular shape around the entire circumference of the can axis below the threaded portion 110. The locking portion 120 is a portion to which a hem portion 153 of a bridged screw cap (hereinafter simply referred to as a "cap") 150 is roll-formed, and has a shape capable of locking the hem portion 153 of the cap 150 that is bent inward in the radial direction and has a bead portion 140 that narrows in the radial direction below the bulging skirt portion 130.
In such a bottle-shaped can 100, after the contents such as a beverage are filled therein, a cap 150 is wrapped around the mouth portion 101 in a capping process. Specifically, a cylindrical cap 150 with a top is placed over the mouth 101, and a downward load is applied to the cap 150 to seal the inside of the bottle-can 100. While maintaining this sealed state, a thread roller is pressed radially inward against the upper part of the peripheral wall 152 of the cap 150 at a height position corresponding to the threaded portion 110 while being rolled circumferentially around the can axis, thereby forming a female thread shape in the peripheral wall 152 of the cap 150 that matches the male thread shape of the threaded portion 110. Furthermore, a skirt roller is applied radially inward to the lower end of the peripheral wall 152 of the cap 150 at a height position facing the skirt portion 130 and the bead portion 140 while being rolled all around the can axis to roll-form the hem portion 153 of the cap 150, whereby the hem portion 153 of the cap 150 is tightly fitted and engaged with the skirt portion 130 and the bead portion 140 (see, for example, Patent Document 1).

特開２００４－２７６９９０号公報JP 2004-276990 A

一方、このようなボトル缶について、ボトル缶の製造時や輸送時のＣＯ2 の排出量を削減する環境負荷を低減させる目的や、金属材料の使用量の削減によってコストダウンを図る目的などから、軽量化を図ることが進められている。
しかしながら、ボトル缶の軽量化を実現するにはボトル缶を形成するための原板の薄肉化を図ることになるが、軽量化（薄肉化）に伴ってボトル缶の強度低下が懸念される。具体的には、キャップ１５０の裾部１５３を係止部１２０の外形に沿ってロールオン成形する際に２つのスカートローラーが互いに対向してそれぞれ径方向内方に向かう荷重をかけるので、ボトル缶の口部の強度が低いと、口部１０１が平面視で真円から楕円に変形する度合いがより大きくなるおそれがある。口部１０１に変形が大きく生じると、キャップ１５０の裾部１５３が口部１０１の変形に伴って径方向内方に過剰に変形することからブリッジ切れが生じて消費者による開栓有無判断が正確に行うことができなくなったり、シールポイントが形成され難くキャップの保持力が不足し、十分に密封することができずに漏洩が生じてしまうなどの問題が生じるおそれがある。 Meanwhile, efforts are being made to reduce the weight of such bottle-shaped cans in order to reduce the environmental impact by reducing CO2 emissions during the production and transportation of bottle-shaped cans, and to cut costs by reducing the amount of metal materials used.
However, in order to reduce the weight of the bottle can, the thickness of the original plate for forming the bottle can is reduced, but there is a concern that the strength of the bottle can will decrease as the weight is reduced (thinned). Specifically, when the bottom part 153 of the cap 150 is rolled on along the outer shape of the locking part 120, two skirt rollers face each other and apply a load in the radially inward direction, so if the strength of the mouth of the bottle can is low, the degree to which the mouth part 101 is deformed from a perfect circle to an ellipse in a plan view may become greater. If the mouth part 101 is significantly deformed, the bottom part 153 of the cap 150 is excessively deformed in the radially inward direction along with the deformation of the mouth part 101, causing bridge breakage, making it impossible for consumers to accurately determine whether or not the bottle has been opened, or the sealing point is difficult to form, resulting in insufficient cap retention, and insufficient sealing, which may cause leakage.

本発明は、上記課題を解決するものであって、その目的は、ボトル缶を形成するための原板の薄肉化を図った場合であっても、キャッピング工程における口部の変形を抑止することができてブリッジ切れや充填した内容物の漏洩などのキャッピング不良の発生を防止することができるボトル缶およびボトル容器を提供することにある。The present invention is intended to solve the above-mentioned problems, and its purpose is to provide a bottle can and bottle container that can suppress deformation of the mouth during the capping process and prevent capping defects such as broken bridges and leakage of filled contents, even when the original plate used to form the bottle can is made thinner.

本発明のボトル缶は、上部に口部を有する有底筒状のボトル缶であって、
前記口部は、スクリューキャップが螺着されるねじ部と、ねじ部の下方に前記スクリューキャップの裾部が係止される環状の係止部と、前記係止部の下方に連接して垂直に伸びる垂直部とを有し、
前記ボトル缶の口部の口径をＡ（ｍｍ）、前記ボトル缶を形成するための原板の板厚をＢ（ｍｍ）、前記係止部の最大外径と最小外径との半径差（ビードデプス）をＣ（ｍｍ）としたときに、下記式（１）を満たし、
前記口部の上端の開口縁には、径方向外側から下方へ向けて折り返されたカール部が形成され、前記口部の口径Ａは、前記カール部の最大外径であり、
前記口部の口径Ａが３３．０～３４．０ｍｍであり、
前記ボトル缶を形成するための原板の板厚Ｂが０．３００～０．３１５ｍｍであることを特徴とする。
式（１）：Ａ×Ｂ×Ｃ＞１２．７
 The bottle can of the present invention is a bottomed cylindrical bottle can having a mouth at an upper portion,
The mouth portion has a threaded portion to which a screw cap is screwed, an annular locking portion below the threaded portion to which a bottom portion of the screw cap is locked, and a vertical portion extending vertically below the locking portion,
When the diameter of the mouth of the bottle-can is A (mm), the thickness of the original plate for forming the bottle-can is B (mm), and the radial difference (bead depth) between the maximum outer diameter and the minimum outer diameter of the engaging portion is C (mm), the following formula (1) is satisfied:
A curled portion is formed on the opening edge of the upper end of the mouth portion by folding back from the outer side in the radial direction toward the lower side, and a diameter A of the mouth portion is a maximum outer diameter of the curled portion,
The diameter A of the mouth portion is 33.0 to 34.0 mm,
The thickness B of the original plate for forming the bottle can is 0.300 to 0.315 mm .
Formula (1): A × B × C > 12.7

本発明のボトル容器は、上部に口部を有する有底筒状のボトル缶と、当該ボトル缶の口部に装着されるスクリューキャップとを有するボトル容器であって、
前記ボトル缶が上記のボトル缶であり、
前記スクリューキャップが、天板部とその外周縁から垂下した周壁部とを有する有頂筒状のキャップ本体の周壁部に前記ボトル缶のねじ部の雄ねじ形状に螺合可能な雌ねじ部が形成され、前記雌ねじ部の下方に前記ボトル缶の前記スカート部に係止される裾部を有することを特徴とする。 The bottle container of the present invention is a bottle container having a bottomed cylindrical bottle can having a mouth at an upper portion and a screw cap attached to the mouth portion of the bottle can,
The bottle-shaped can is the bottle-shaped can described above,
The screw cap is characterized in that a female threaded portion that can be screwed into the male thread shape of the threaded portion of the bottle-can is formed on the peripheral wall of a topped cylindrical cap body having a top plate portion and a peripheral wall portion hanging down from the outer peripheral edge of the top plate, and a hem portion that engages with the skirt portion of the bottle-can is formed below the female threaded portion.

本発明のボトル缶およびボトル容器によれば、ボトル缶の口部の口径をＡ（ｍｍ）、ボトル缶を形成するための原板の板厚をＢ（ｍｍ）、キャップの裾部が係止される環状の係止部の最大外径と最小外径との半径差（ビードデプス）をＣ（ｍｍ）としたときに、式（１）：Ａ×Ｂ×Ｃ＞１２．７を満たすことから、キャッピング工程においてキャップの裾部を係止部に捲き締めて係止することができる形状に成形する際に、キャップの周壁部の下端に径方向内方に向かう荷重がかけられたときに係止部の径方向内方に凸形状を有するビード部にキャップの周壁部の下端を介して荷重がかかることが抑制されるので、ボトル缶を形成するための原板の薄肉化を図った場合であっても、キャッピング工程における口部の変形を抑止することができて十分なキャップの保持力が得られ、ブリッジ切れや充填した内容物の漏洩などのキャッピング不良の発生を防止することができる。According to the bottle can and bottle container of the present invention, when the diameter of the mouth of the bottle can is A (mm), the thickness of the original plate used to form the bottle can is B (mm), and the radial difference between the maximum and minimum outer diameters of the annular locking portion to which the bottom of the cap is locked (bead depth) is C (mm), formula (1): A x B x C > 12.7 is satisfied. Therefore, when the bottom of the cap is formed into a shape that can be wrapped around and locked to the locking portion in the capping process, when a load is applied radially inward to the lower end of the peripheral wall of the cap, the load is prevented from being applied via the lower end of the peripheral wall of the cap to the bead portion having a convex shape radially inward of the locking portion. Therefore, even if the original plate used to form the bottle can is made thinner, deformation of the mouth in the capping process can be prevented, sufficient cap retention force can be obtained, and capping defects such as broken bridges and leakage of filled contents can be prevented.

本発明の請求項２に記載の発明によれば、係止部の最大外径と最小外径との半径差（ビードデプス）Ｃが１．３０ｍｍ以上であることにより、キャッピング工程においてキャップの周壁部の下端を介してボトル缶の口部に荷重がかかることを確実に抑制することができるので、より一層確実にキャッピング工程における口部の変形を抑止することができる。
本発明の請求項３に記載の発明によれば、キャッピング工程において係止部に内方に向かう荷重がかけられたときに係止部を構成する斜面に楕円変形が生じることを抑制することができるので、十分なキャップの保持力が得られ充填した内容物の漏洩などのキャッピング不良の発生をより一層確実に防止することができる。
本発明の請求項４に記載の発明によれば、ボトル缶の口部の口径Ａが３３．０～３４．０ｍｍであっても、キャッピング工程においてキャップの周壁部の下端を介してボトル缶の口部に荷重がかかることを確実に抑制することができるので、確実にキャッピング工程における口部の変形を抑止することができる。 According to the invention described in claim 2 of the present invention, the radial difference (bead depth) C between the maximum outer diameter and the minimum outer diameter of the engaging portion is 1.30 mm or more, thereby reliably preventing a load from being applied to the mouth of the bottle can through the lower end of the peripheral wall portion of the cap during the capping process, thereby more reliably preventing deformation of the mouth during the capping process.
According to the invention described in claim 3 of the present invention, it is possible to suppress the occurrence of elliptical deformation on the inclined surface constituting the locking portion when an inward load is applied to the locking portion during the capping process, thereby obtaining sufficient cap holding force and more reliably preventing the occurrence of capping defects such as leakage of the filled contents.
According to the invention described in claim 4 of the present invention, even if the diameter A of the mouth of the bottle-can is 33.0 to 34.0 mm, it is possible to reliably prevent a load from being applied to the mouth of the bottle-can through the lower end of the peripheral wall of the cap during the capping process, thereby reliably preventing deformation of the mouth during the capping process.

本発明の一実施形態に係るボトル缶を、キャップを装着した状態で示す一部断面図である。1 is a partial cross-sectional view showing a bottle can according to one embodiment of the present invention with a cap attached. 本発明の一実施形態に係るボトル缶の係止部の一部を示す端面図である。FIG. 2 is an end view showing a part of a locking portion of the bottle-shaped can according to one embodiment of the present invention. 本発明の実施例および比較例に係るボトル缶のたわみ量を示す棒グラフである。1 is a bar graph showing the amount of deflection of bottle-shaped cans according to an embodiment of the present invention and a comparative example.

以下、本発明について詳細に説明する。
本発明の一実施形態に係るボトル容器は、図１に示すように、内部に飲料等の内容物が充填され、上部に口部１０１を有する有底筒状のボトル缶１００と、このボトル缶１００の口部１０１に装着されてボトル缶１００を密封するスクリューキャップ１５０とを有する。 The present invention will be described in detail below.
As shown in FIG. 1 , a bottle container according to one embodiment of the present invention has a bottomed, cylindrical bottle can 100 filled with a beverage or other contents and having a mouth 101 at the top, and a screw cap 150 that is attached to the mouth 101 of the bottle can 100 to seal the bottle can 100.

本発明の一実施形態に係るボトル缶１００は、アルミニウム、アルミニウム合金、スチール等の金属材料からなるものである。
ボトル缶１００は、缶胴（図示せず）および缶底（図示せず）を有し、缶胴は、缶底と連続する円柱状の胴部（図示せず）と、この胴部から上方に向かうに従って径方向内方に縮径するテーパー状の肩部１０２（図２参照）と、この肩部１０２の上方に垂立する垂直部１４４を介して立設され缶胴よりも小径の口部１０１とを有している。 The bottle-shaped can 100 according to one embodiment of the present invention is made of a metal material such as aluminum, an aluminum alloy, or steel.
The bottle-shaped can 100 has a can body (not shown) and a can bottom (not shown). The can body has a cylindrical body portion (not shown) that is continuous with the can bottom, a tapered shoulder portion 102 (see FIG. 2 ) that narrows radially inward as it extends upward from the body portion, and a mouth portion 101 that is erected above the shoulder portion 102 via a vertical portion 144 that extends perpendicularly therefrom and has a smaller diameter than the can body.

口部１０１には、キャップ１５０が螺合可能な複数の断面略円弧状の湾曲部を組み合わせた雄ねじ形状を有するねじ部１１０が形成されており、ねじ部１１０の下方には、キャップ１５０の裾部１５３がロールオン成形により係止される係止部１２０が缶軸周りの全周にわたって環状に形成されている。
係止部１２０は、図２に示されるように、ねじ部１１０の下方に隣接した位置に形成されたスカート部１３０と、スカート部１３０の下方に連続した位置に形成されたビード部１４０とを有する。
スカート部１３０は、径方向外方（図２において左方）に缶軸周りの全周にわたって膨出して形成された環状の凸部であり、スカート部１３０の外径は、例えばねじ部１１０の外径よりも大きい。
ビード部１４０は、径方向内方（図２において右方）に縮径する、缶軸周りの全周にわたってスカート部１３０とは反対向きに縮径して形成された環状の凹部である。
また、口部１０１の上端の開口縁には、径方向外側から下方へ向けて折り返されたカール部１０３が、缶軸周りの全周にわたって環状に形成されている。 The mouth portion 101 is formed with a threaded portion 110 having a male screw shape combining multiple curved portions with an approximately arc-shaped cross section onto which the cap 150 can be screwed, and below the threaded portion 110 is formed a locking portion 120 in an annular shape around the entire circumference of the can shaft, to which the bottom portion 153 of the cap 150 is locked by roll-on molding.
As shown in FIG. 2 , the locking portion 120 has a skirt portion 130 formed at a position adjacent to and below the threaded portion 110 , and a bead portion 140 formed at a position continuous with and below the skirt portion 130 .
The skirt portion 130 is an annular convex portion formed by bulging radially outward (to the left in FIG. 2 ) around the entire circumference of the can shaft, and the outer diameter of the skirt portion 130 is larger than the outer diameter of the threaded portion 110, for example.
The bead portion 140 is an annular recess that tapers radially inward (to the right in FIG. 2 ) and is formed around the entire circumference of the can shaft in the opposite direction to the skirt portion 130 .
In addition, a curled portion 103 is formed in an annular shape around the entire circumference of the can axis at the opening edge at the upper end of the mouth portion 101 by folding back from the radially outer side toward the downward direction.

スカート部１３０は、缶軸に沿った縦断面において、下方へ向かうに従って径方向外方に向かう上斜面１３１と、上斜面１３１から連続する略上下方向に延びる壁面１３２と、壁面１３２から連続する下方に向かうに従って径方向内方に向かう下斜面１３３とを有し、各辺（各面）が滑らかな弧状に連続された断面形状のものであり、上斜面１３１はねじ部１１０の下端に連続している。また、下斜面１３３は断面が略直線状とされている。
ビード部１４０は、缶軸に沿った縦断面において、スカート部１３０の下斜面１３３と連続し、下方へ向かうに従って径方向内方に向かう断面略直線状の上斜面１４１と、上斜面１４１から連続する略上下方向に延びる壁面１４２と、壁面１４２から連続する下方に向かうに従って径方向外方に向かう下斜面１４３とを有し、各辺（各面）が滑らかな弧状に連続された断面形状のものである。ビード部１４０の下斜面１４３の下方には垂直に伸びる垂直部１４４が連接されており、これにより、係止部１２０と肩部１０２とが垂直部１４４を介して連接されている。
本実施形態においては、ビード部１４０の上斜面１４１がスカート部１３０の下斜面１３３の延長線上に一致するように形成されており、このスカート部１３０の下斜面１３３およびビード部１４０の上斜面１４１に対してキャップ１５０の裾部１５３がロールオン成形されて裾部１５３が径方向内方に屈曲されることにより、キャップ１５０が係止される。 In a longitudinal cross section along the can axis, the skirt portion 130 has an upper inclined surface 131 that extends radially outward as it extends downward, a wall surface 132 that is continuous with the upper inclined surface 131 and extends in a generally vertical direction, and a lower inclined surface 133 that is continuous with the wall surface 132 and extends radially inward as it extends downward, with each side (each surface) having a cross-sectional shape that continues in a smooth arc, and the upper inclined surface 131 is continuous with the lower end of the threaded portion 110. The lower inclined surface 133 has a generally linear cross section.
In a longitudinal section along the can axis, the bead portion 140 has an upper slope 141 that is continuous with the lower slope 133 of the skirt portion 130 and has a generally linear cross section that extends radially inward as it extends downward, a wall surface 142 that extends generally in the vertical direction and is continuous with the upper slope 141, and a lower slope 143 that extends radially outward as it extends downward and is continuous with the wall surface 142, with each side (each surface) having a cross-sectional shape that is continuous in a smooth arc. A vertical portion 144 that extends vertically is connected below the lower slope 143 of the bead portion 140, thereby connecting the locking portion 120 and the shoulder portion 102 via the vertical portion 144.
In this embodiment, the upper slope 141 of the bead portion 140 is formed to coincide with an extension of the lower slope 133 of the skirt portion 130, and the bottom portion 153 of the cap 150 is rolled onto the lower slope 133 of the skirt portion 130 and the upper slope 141 of the bead portion 140, thereby bending the bottom portion 153 radially inward, thereby engaging the cap 150.

本実施形態においては、ボトル缶１００の口部１０１の口径をＡ（ｍｍ）、ボトル缶１００を形成するための原板の板厚をＢ（ｍｍ）、係止部１２０の最大外径と最小外径との半径差（ビードデプス）をＣ（ｍｍ）としたときに、下記式（１）を満たす。
式（１）：Ａ×Ｂ×Ｃ＞１２．７
ボトル缶１００の口部１０１の口径とは、カール部１０３の最大外径をいう。
係止部１２０の最大外径とは、スカート部１３０の最大外径すなわち最大の膨出径をいい、本実施形態においては壁面１３２の最大の外径をいう。
係止部１２０の最小外径とは、ビード部１４０の最小外径をいい、本実施形態においては壁面１４２の最小の外径をいう。 In this embodiment, when the diameter of the mouth portion 101 of the bottle-can 100 is A (mm), the thickness of the original plate for forming the bottle-can 100 is B (mm), and the radial difference (bead depth) between the maximum outer diameter and the minimum outer diameter of the engagement portion 120 is C (mm), the following formula (1) is satisfied.
Formula (1): A × B × C > 12.7
The diameter of the mouth portion 101 of the bottle-shaped can 100 refers to the maximum outer diameter of the curled portion 103 .
The maximum outer diameter of the engagement portion 120 refers to the maximum outer diameter of the skirt portion 130 , that is, the maximum bulging diameter, and in this embodiment, refers to the maximum outer diameter of the wall surface 132 .
The minimum outer diameter of the locking portion 120 refers to the minimum outer diameter of the bead portion 140 , and in this embodiment, refers to the minimum outer diameter of the wall surface 142 .

ビードデプス（図２においてｄで示す。）は、例えば１．３０ｍｍ以上であり、好ましくは１．３０ｍｍ以上１．７０ｍｍ以下、より好ましくは１．４０ｍｍ以上１．６０ｍｍ以下、特に好ましくは１．４５ｍｍとされる。
ビードデプスが１．３０ｍｍ以上であることにより、キャッピング工程においてキャップ１５０の周壁部の下端を介してボトル缶１００の口部１０１に荷重がかかることを確実に抑制することができる。ビードデプスが過小である場合には、ロールオン成形時にキャップ１５０の裾部１５３を介して口部１０１に荷重がかかり、口部１０１の変形を招来するおそれがある。一方、ビードデプスが過大である場合には、成形が過酷となりビード部１４０などに割れ等の成形不良を生じるおそれがある。
スカート部１３０の最大外径は、例えば３７．８０ｍｍとされる。
ビード部１４０の最小外径は、例えば３４．９０とされる。
また、ビード部１４０の缶軸に沿った高さは例えば４．４２ｍｍとされる。 The bead depth (indicated as d in FIG. 2) is, for example, 1.30 mm or more, preferably 1.30 mm or more and 1.70 mm or less, more preferably 1.40 mm or more and 1.60 mm or less, and particularly preferably 1.45 mm.
By setting the bead depth to 1.30 mm or more, it is possible to reliably prevent a load from being applied to the mouth portion 101 of the bottle-can 100 via the lower end of the peripheral wall portion of the cap 150 during the capping process. If the bead depth is too small, a load is applied to the mouth portion 101 via the bottom portion 153 of the cap 150 during roll-on molding, which may cause deformation of the mouth portion 101. On the other hand, if the bead depth is too large, molding becomes too harsh and molding defects such as cracks may occur in the bead portion 140, etc.
The maximum outer diameter of the skirt portion 130 is, for example, 37.80 mm.
The minimum outer diameter of the bead portion 140 is, for example, 34.90.
The height of the bead portion 140 along the can axis is, for example, 4.42 mm.

ボトル缶１００の口部１０１の口径は、例えば３３．４５ｍｍとされ、３３．０～３４．０ｍｍ程度とすることができる。
ボトル缶１００を形成するための原板の板厚は、例えば容量が３００ｍＬである場合には０．３００～０．３５０ｍｍ、容量が４００ｍＬである場合には０．３００～０．３５０ｍｍとすることができる。
また、本実施形態において、スカート部１３０の下斜面１３３およびビード部１４０の上斜面１４１の傾斜角度θは、缶軸に対して例えば４８．７°とされる。 The diameter of the mouth portion 101 of the bottle-shaped can 100 is, for example, 33.45 mm, and can be about 33.0 to 34.0 mm.
The thickness of the original plate for forming the bottle-shaped can 100 may be, for example, 0.300 to 0.350 mm when the capacity is 300 mL, and 0.300 to 0.350 mm when the capacity is 400 mL.
In this embodiment, the inclination angle θ of the lower inclined surface 133 of the skirt portion 130 and the upper inclined surface 141 of the bead portion 140 with respect to the can axis is, for example, 48.7°.

また、係止部１２０の最大外径すなわちスカート部１３０の最大外径と、垂直部１４４の外径（最大外径）とは、略同等とすることができる。
スカート部１３０の最大外径と垂直部１４４の外径とが略同等の大きさであることにより、キャッピング工程において係止部１２０に缶軸に沿って下方に向かう荷重および径方向内方に向かう荷重がかけられたときに、ビード部１４０を構成する上斜面１４１、壁面１４２および下斜面１４３に楕円変形が生じることを抑制することができるので、十分なキャップの保持力が得られる。これは、ビード部１４０の上斜面１４１（スカート部１３０の下斜面１３３）および下斜面１４３のバランスが保たれて径方向内方に向かう荷重がかけられたときにも径方向内方に屈曲しにくくなると共に上下方向の変形も抑制され、軸荷重強度が向上するためと推測される。 Furthermore, the maximum outer diameter of the engaging portion 120, i.e., the maximum outer diameter of the skirt portion 130, and the outer diameter (maximum outer diameter) of the vertical portion 144 can be made substantially equal.
Since the maximum outer diameter of the skirt portion 130 and the outer diameter of the vertical portion 144 are approximately equal in size, when a load downward along the can axis and a load in the radially inward direction are applied to the locking portion 120 in the capping process, the upper inclined surface 141, the wall surface 142, and the lower inclined surface 143 constituting the bead portion 140 can be prevented from elliptical deformation, and sufficient cap retention force can be obtained. This is presumably because the balance between the upper inclined surface 141 (the lower inclined surface 133 of the skirt portion 130) and the lower inclined surface 143 of the bead portion 140 is maintained, so that even when a load in the radially inward direction is applied, bending in the radially inward direction is unlikely, and deformation in the up-down direction is also suppressed, thereby improving the axial load strength.

キャップ１５０は、天板部１５１とその外周縁から垂下した周壁部１５２を有する有頂筒状の金属製キャップ本体の周壁部１５２にボトル缶１００のねじ部１１０の雄ねじ形状に螺合する雌ねじ部が形成され、雌ねじ部の下方にボトル缶１００の係止部１２０に係止される裾部１５３が形成されている。キャップ１５０内部の天板部１５１の裏面には、ボトル缶１００の開口端面を密閉するための軟質樹脂等からなるシール用部材１５４が挟み込まれている。The cap 150 is a cylindrical metal cap body having a top plate 151 and a peripheral wall 152 hanging down from its outer periphery. A female thread is formed on the peripheral wall 152 of the cap body, which is threaded into the male thread of the threaded portion 110 of the bottle-can 100, and a bottom portion 153 is formed below the female thread to be engaged with the engaging portion 120 of the bottle-can 100. A sealing member 154 made of soft resin or the like is sandwiched between the back surface of the top plate 151 inside the cap 150 and used to seal the open end of the bottle-can 100.

ボトル缶１００は、アルミニウム、アルミニウム合金、スチール等の金属材料からなる原板を円形状に打ち抜き、それを絞り加工して有底円筒状のカップ成形体を得、更にそれを絞り・しごき加工（ＤＩ成形）して有底円筒状の缶体を得た後、ネッキング工程においてテーパー状に縮径した肩部および円筒状の口部を形成し、その後に、ねじ加工などを含む口部の成形を行うことにより、繋ぎ目のない一体物として製造される。
ボトル容器は、ボトル缶１００内部に飲料等の内容物が充填され、キャッピング装置によって口部１０１には有頂筒状のキャップ１５０が嵌着されることにより、製造される。
ボトル缶１００にキャップ１５０を装着するキャッピング工程においては、口部１０１の開口端面にシール用部材１５４が当接するようにキャップ１５０を被せ、このキャップ１５０に下方に向かう荷重をかけてボトル缶１００内を密封状態とし、この密封状態を維持しながらキャップ１５０の周壁部１５２の上部に対して、ねじ部１１０に対応する高さ位置にスレッドローラーを径方向内方に押し当てながら缶軸回りの周方向に転動させることにより、キャップ１５０の周壁にねじ部１１０の雄ねじ形状に適合する雌ねじ形状を成形しながら螺合状態を形成し、また、キャップ１５０の周壁の下端に対して、スカート部１３０とビード部１４０との境目に対向する高さ位置にスカートローラーにより径方向内方に荷重を付与しながら缶軸回りの全周に転動させてキャップ１５０の裾部１５３をロールオン成形して、キャップ１５０の裾部１５３がスカート部１３０およびビード部１４０に密着して係止させる。 The bottle-shaped can 100 is produced by punching out a blank made of a metal material such as aluminum, an aluminum alloy, or steel into a circular shape, drawing the blank to obtain a cylindrical cup shape with a bottom, and then drawing and ironing the blank (DI forming) to obtain a cylindrical can body with a bottom. After that, a tapered shoulder and a cylindrical mouth are formed in a necking process, and the mouth is then shaped, including by threading, to produce a seamless, one-piece product.
The bottle container is manufactured by filling the bottle can 100 with a beverage or other contents, and fitting a topped cylindrical cap 150 onto the mouth portion 101 by a capping device.
In the capping process for fitting the cap 150 to the bottle-can 100, the cap 150 is placed on the opening end face of the mouth 101 so that the sealing member 154 abuts against the opening end face, and a downward load is applied to the cap 150 to seal the inside of the bottle-can 100. While maintaining this sealed state, a thread roller is pressed radially inward against the upper part of the peripheral wall portion 152 of the cap 150 at a height position corresponding to the threaded portion 110 while being rolled in a circumferential direction around the can axis, thereby forming a female thread shape that matches the male thread shape of the threaded portion 110 on the peripheral wall of the cap 150 and forming a screwed state. In addition, a skirt roller is applied radially inward to the lower end of the peripheral wall of the cap 150 at a height position opposite the boundary between the skirt portion 130 and the bead portion 140 while being rolled all around the can axis to roll-on the hem portion 153 of the cap 150, so that the hem portion 153 of the cap 150 is in close contact with and engaged with the skirt portion 130 and the bead portion 140.

以上のようなボトル缶１００およびボトル容器によれば、ボトル缶１００の口部１０１の口径Ａ（ｍｍ）、ボトル缶を形成するための原板の板厚Ｂ（ｍｍ）、裾部１５３が係止される環状の係止部１２０の最大外径と最小外径との半径差（ビードデプス）Ｃ（ｍｍ）が式（１）：Ａ×Ｂ×Ｃ＞１２．７を満たすことから、キャッピング工程においてキャップ１５０の裾部１５３を係止部１２０に捲き締めて係止することができる形状に成形する際に、キャップ１５０の周壁部１５２の下端に径方向内方に向かう荷重がかけられたときに係止部１２０の径方向内方に凸形状を有するビード部１４０にキャップ１５０の周壁部１５２の下端を介して荷重がかかることが抑制されるので、ボトル缶１００を形成するための原板の薄肉化を図った場合であっても、キャッピング工程における口部１０１の変形を抑止することができて十分なキャップ１５０の保持力が得られ、ブリッジ切れや充填した内容物の漏洩などのキャッピング不良の発生を防止することができる。According to the bottle-shaped can 100 and bottle container described above, the diameter A (mm) of the mouth 101 of the bottle-shaped can 100, the thickness B (mm) of the original plate for forming the bottle-shaped can, and the radius difference (bead depth) C (mm) between the maximum outer diameter and the minimum outer diameter of the annular locking portion 120 to which the bottom 153 is locked satisfy the formula (1): A x B x C > 12.7. Therefore, when the bottom 153 of the cap 150 is formed into a shape that can be wrapped around and locked to the locking portion 120 in the capping process, the peripheral wall portion 152 of the cap 150 is When a load is applied radially inward to the lower end of the engaging portion 120, the load is prevented from being applied to the bead portion 140, which has a convex shape radially inward of the engaging portion 120, via the lower end of the peripheral wall portion 152 of the cap 150. Therefore, even if the original plate used to form the bottle-can 100 is made thinner, deformation of the mouth portion 101 during the capping process can be suppressed, sufficient holding force of the cap 150 can be obtained, and capping defects such as bridge breakage and leakage of the filled contents can be prevented.

以上、本発明の実施形態に係るボトル缶およびボトル容器について説明したが、本発明は上記の実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更を加えることができる。
例えば、スカート部１３０およびビード部１４０の具体的な形状は、キャップ１５０の裾部１５３をロールオン成形されて係止部１２０に係止させることができる形状であれば、各面が平面状でなく弧状湾曲状であってもよい。
また例えば、ボトル缶は缶胴と缶底とが別体として形成されたものであってもよい。 The above describes the bottle can and bottle container according to the embodiment of the present invention, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, the specific shapes of the skirt portion 130 and the bead portion 140 may be such that each surface is not flat but is curved in an arc, so long as the bottom portion 153 of the cap 150 can be rolled on and engaged with the engaging portion 120.
Further, for example, a bottle-shaped can may be one in which the body and the bottom are formed separately.

以下、本発明の具体的な実施例について説明するが、本発明はこれらに限定されるものではない。
〔実施例１〕
以下の仕様で、図１および図２に示すボトル缶〔１〕を１０缶作製した。
・容量：３００ｍＬ
・原板の材質：アルミニウム合金
・原板の板厚：０．３１５ｍｍ
・口部の口径：３３．４５ｍｍ
・係止部の最大外径（スカート部の最大外径）：３７．８０ｍｍ
・係止部の最小外径（ビード部の最小外径）：３４．９０ｍｍ
・係止部の最大外径と最小外径との半径差（ビードデプス）：１．４５ｍｍ
・スカート部の下斜面の角度：４８．７°
Ａ×Ｂ×Ｃ＝１５．３（＞１２．７）であり、得られた１０缶のボトル缶について、係止部を左右から約１１１Ｎの荷重で横圧縮し、平面視における初期のビード部の最小外径と横圧縮後のビード部の最小外径との差（以下「たわみ量」とする）を測定した結果、平均値は２．２８ｍｍであった。結果を図３に示す。なお、たわみ量は、２．６５ｍｍ以下であればキャッピング不良の発生が抑制されて実用に耐えると考えられる。 Specific examples of the present invention will be described below, but the present invention is not limited to these.
Example 1
Ten bottle-shaped cans [1] shown in Figs. 1 and 2 were produced according to the following specifications.
Capacity: 300mL
-Material of base plate: Aluminum alloy -Thickness of base plate: 0.315 mm
Mouth diameter: 33.45 mm
Maximum outer diameter of the locking part (maximum outer diameter of the skirt part): 37.80 mm
Minimum outer diameter of the engaging portion (minimum outer diameter of the bead portion): 34.90 mm
Radius difference between the maximum and minimum outer diameters of the engaging portion (bead depth): 1.45 mm
・Angle of the lower slope of the skirt: 48.7°
A x B x C = 15.3 (> 12.7), and the locking portion of the obtained 10 bottle-shaped cans was compressed laterally from the left and right with a load of about 111 N, and the difference between the initial minimum outer diameter of the bead portion in a plan view and the minimum outer diameter of the bead portion after the lateral compression (hereinafter referred to as "deflection amount") was measured, and the average value was 2.28 mm. The results are shown in Figure 3. It is considered that if the deflection amount is 2.65 mm or less, the occurrence of capping failure is suppressed and the can is practically usable.

〔実施例２〕
実施例１において、係止部の最小外径を変化させて最大外径と最小外径との半径差（ビードデプス）を１．３０ｍｍとしたこと以外は同様にして、ボトル缶〔２〕を１０缶作製した。
Ａ×Ｂ×Ｃ＝１３．７（＞１２．７）であり、得られた１０缶のボトル缶のたわみ量を実施例１と同様にして測定したころ、平均値は２．５５ｍｍであった。結果を図３に示す。 Example 2
Ten bottle-shaped cans [2] were produced in the same manner as in Example 1, except that the minimum outer diameter of the engaging portion was changed so that the radial difference between the maximum outer diameter and the minimum outer diameter (bead depth) was 1.30 mm.
A x B x C = 13.7 (>12.7), and the amount of deflection of the resulting 10 bottle-shaped cans was measured in the same manner as in Example 1, and the average value was 2.55 mm. The results are shown in Figure 3.

〔実施例３〕
実施例１において、係止部の最小外径を変化させて最大外径と最小外径との半径差（ビードデプス）を１．５０ｍｍとしたこと以外は同様にして、ボトル缶〔３〕を１０缶作製した。
Ａ×Ｂ×Ｃ＝１５．８（＞１２．７）であり、得られた１０缶のボトル缶のたわみ量を実施例１と同様にして測定したころ、平均値は２．２８ｍｍであった。結果を図３に示す。 Example 3
Ten bottle-shaped cans [3] were produced in the same manner as in Example 1, except that the minimum outer diameter of the engaging portion was changed so that the radial difference between the maximum outer diameter and the minimum outer diameter (bead depth) was 1.50 mm.
A x B x C = 15.8 (>12.7), and the amount of deflection of the resulting 10 bottle-shaped cans was measured in the same manner as in Example 1, and the average value was 2.28 mm. The results are shown in Figure 3.

〔実施例４〕
実施例１において、係止部の最小外径を変化させて最大外径と最小外径との半径差（ビードデプス）を１．８０ｍｍとしたこと以外は同様にして、ボトル缶〔４〕を１０缶作製した。
Ａ×Ｂ×Ｃ＝１９．０（＞１２．７）であり、得られた１０缶のボトル缶のたわみ量を実施例１と同様にして測定したころ、平均値は１．７５ｍｍであった。結果を図３に示す。 Example 4
Ten bottle-shaped cans [4] were produced in the same manner as in Example 1, except that the minimum outer diameter of the engaging portion was changed so that the radial difference between the maximum outer diameter and the minimum outer diameter (bead depth) was 1.80 mm.
A×B×C=19.0 (>12.7), and the amount of deflection of the resulting 10 bottle-shaped cans was measured in the same manner as in Example 1, and the average value was 1.75 mm. The results are shown in FIG.

〔比較例１〕
実施例１において、係止部の最小外径を変化させて最大外径と最小外径との半径差（ビードデプス）を１．２０ｍｍとしたこと以外は同様にして、ボトル缶〔５〕を１０缶作製した。
Ａ×Ｂ×Ｃ＝１２．６（＜１２．７）であり、得られた１０缶のボトル缶のたわみ量を実施例１と同様にして測定したころ、平均値は３．１８ｍｍであった。結果を図３に示す。 Comparative Example 1
Ten bottle-shaped cans [5] were produced in the same manner as in Example 1, except that the minimum outer diameter of the engaging portion was changed so that the radial difference between the maximum outer diameter and the minimum outer diameter (bead depth) was 1.20 mm.
A x B x C = 12.6 (<12.7), and the amount of deflection of the resulting 10 bottle-shaped cans was measured in the same manner as in Example 1, and the average value was 3.18 mm. The results are shown in Figure 3.

〔参考例１〕
実施例１において、用いる原板を板厚０．３４５ｍｍのものとし、係止部の最小外径を変化させて最大外径と最小外径との半径差（ビードデプス）を１．２０ｍｍとしたこと以外は同様にして、ボトル缶〔６〕を１０缶作製した。
Ａ×Ｂ×Ｃ＝１３．８（＞１２．７）であり、得られた１０缶のボトル缶のたわみ量を実施例１と同様にして測定したころ、平均値は２．３０ｍｍであった。結果を図３に示す。 [Reference Example 1]
Ten bottle-shaped cans [6] were produced in the same manner as in Example 1, except that the original plate used had a plate thickness of 0.345 mm and the minimum outer diameter of the engaging portion was changed so that the radial difference between the maximum outer diameter and the minimum outer diameter (bead depth) was 1.20 mm.
A x B x C = 13.8 (> 12.7), and the amount of deflection of the resulting 10 bottle-shaped cans was measured in the same manner as in Example 1, and the average value was 2.30 mm. The results are shown in Figure 3.

図３から明らかなように、本発明のボトル缶〔１〕～〔４〕によれば、いずれもたわみ量がキャッピング不良の発生が懸念される２．６５ｍｍよりも小さく、軽量化を図ることが可能でありながら、参考例１に係るボトル缶〔５〕のような板厚の大きい原板を使用したボトル缶と同程度の強度（耐たわみ強度）が得られることが確認された。
一方、比較例１に係るボトル缶〔６〕においては、たわみ量が３．１８ｍｍと大きく、十分な強度（耐たわみ強度）が得られないことが確認された。 As is clear from FIG. 3, according to the bottle-shaped cans [1] to [4] of the present invention, the amount of deflection is smaller than 2.65 mm, at which there is a concern that capping defects may occur, and it is possible to reduce the weight, while it has been confirmed that the bottle-shaped cans have the same strength (deflection resistance strength) as the bottle-shaped can [5] of Reference Example 1, which uses a base plate with a large plate thickness.
On the other hand, in the bottle-shaped can [6] according to Comparative Example 1, the amount of deflection was large at 3.18 mm, and it was confirmed that sufficient strength (deflection resistance strength) was not obtained.

１００ ボトル缶
１０１ 口部
１０２ 肩部
１０３ カール部
１１０ ねじ部
１２０ 係止部
１３０ スカート部
１３１ 上斜面
１３２ 壁面
１３３ 下斜面
１４０ ビード部
１４１ 上斜面
１４２ 壁面
１４３ 下斜面
１４４ 垂直部
１５０ キャップ
１５１ 天板部
１５２ 周壁部
１５３ 裾部
１５４ シール用部材

 Reference Signs List 100 Bottle can 101 Mouth 102 Shoulder 103 Curl 110 Thread 120 Locking 130 Skirt 131 Upper inclined surface 132 Wall 133 Lower inclined surface 140 Bead 141 Upper inclined surface 142 Wall 143 Lower inclined surface 144 Vertical 150 Cap 151 Top 152 Peripheral wall 153 Bottom 154 Sealing member

Claims (4)

上部に口部を有する有底筒状のボトル缶であって、
前記口部は、スクリューキャップが螺着されるねじ部と、ねじ部の下方に前記スクリューキャップの裾部が係止される環状の係止部と、前記係止部の下方に連接して垂直に伸びる垂直部とを有し、
前記ボトル缶の口部の口径をＡ（ｍｍ）、前記ボトル缶を形成するための原板の板厚をＢ（ｍｍ）、前記係止部の最大外径と最小外径との半径差（ビードデプス）をＣ（ｍｍ）としたときに、下記式（１）を満たし、
前記口部の上端の開口縁には、径方向外側から下方へ向けて折り返されたカール部が形成され、前記口部の口径Ａは、前記カール部の最大外径であり、
前記口部の口径Ａが３３．０～３４．０ｍｍであり、
前記ボトル缶を形成するための原板の板厚Ｂが０．３００～０．３１５ｍｍであることを特徴とするボトル缶。
式（１）：Ａ×Ｂ×Ｃ＞１２．７ A bottomed cylindrical bottle can having a mouth at the top,
The mouth portion has a threaded portion to which a screw cap is screwed, an annular locking portion below the threaded portion to which a bottom portion of the screw cap is locked, and a vertical portion extending vertically below the locking portion,
When the diameter of the mouth of the bottle-can is A (mm), the thickness of the original plate for forming the bottle-can is B (mm), and the radial difference (bead depth) between the maximum outer diameter and the minimum outer diameter of the engaging portion is C (mm), the following formula (1) is satisfied:
A curled portion is formed on the opening edge of the upper end of the mouth portion by folding back from the outer side in the radial direction toward the lower side, and a diameter A of the mouth portion is a maximum outer diameter of the curled portion,
The diameter A of the mouth portion is 33.0 to 34.0 mm,
The bottle-shaped can is characterized in that the thickness B of the original plate for forming the bottle-shaped can is 0.300 to 0.315 mm .
Formula (1): A × B × C > 12.7 前記係止部の最大外径と最小外径との半径差（ビードデプス）Ｃが１．３０ｍｍ以上であることを特徴とする請求項１に記載のボトル缶。 The bottle-shaped can according to claim 1, characterized in that the radius difference (bead depth) C between the maximum and minimum outer diameters of the engaging portion is 1.30 mm or more. 前記係止部の最大外径と前記垂直部の外径とが略同等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 bottle-shaped can according to claim 1 or 2, characterized in that the maximum outer diameter of the locking portion and the outer diameter of the vertical portion are approximately equal. 上部に口部を有する有底筒状のボトル缶と、当該ボトル缶の口部に装着されるスクリューキャップとを有するボトル容器であって、A bottle container having a bottomed cylindrical bottle can having a mouth at an upper portion and a screw cap attached to the mouth of the bottle can,
前記ボトル缶が、請求項１乃至請求項３のいずれかに記載のボトル缶であり、The bottle-shaped can is the bottle-shaped can according to any one of claims 1 to 3,
前記スクリューキャップが、天板部とその外周縁から垂下した周壁部とを有する有頂筒状のキャップ本体の周壁部に前記ボトル缶のねじ部の雄ねじ形状に螺合可能な雌ねじ部が形成され、前記雌ねじ部の下方に前記ボトル缶の前記係止部に係止される裾部を有することを特徴とするボトル容器。The screw cap is a bottle container characterized in that the screw cap has a topped, cylindrical cap body having a top plate portion and a peripheral wall portion hanging down from its outer periphery, and a female thread portion is formed on the peripheral wall portion which can be screwed into the male thread shape of the threaded portion of the bottle-can, and below the female thread portion is a bottom portion which can be engaged with the engaging portion of the bottle-can.
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