WO2021117317A1 - Bottle can and bottle container - Google Patents

Bottle can and bottle container Download PDF

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Publication number
WO2021117317A1
WO2021117317A1 PCT/JP2020/036327 JP2020036327W WO2021117317A1 WO 2021117317 A1 WO2021117317 A1 WO 2021117317A1 JP 2020036327 W JP2020036327 W JP 2020036327W WO 2021117317 A1 WO2021117317 A1 WO 2021117317A1
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WO
WIPO (PCT)
Prior art keywords
bottle
cap
outer diameter
mouth
screw
Prior art date
Application number
PCT/JP2020/036327
Other languages
French (fr)
Japanese (ja)
Inventor
健 村瀬
長谷川　俊幸
章太 田中
Original Assignee
東洋製罐株式会社
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 東洋製罐株式会社 filed Critical 東洋製罐株式会社
Priority to JP2021563756A priority Critical patent/JPWO2021117317A1/ja
Publication of WO2021117317A1 publication Critical patent/WO2021117317A1/en

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Classifications

    • 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

Definitions

  • the present invention relates to a bottle can and a bottle container having a locking portion in which the hem of the screw cap is locked below the screw portion in the mouth portion.
  • a metal bottle can used as a beverage container has a can body and a can bottom, has a mouth portion having a diameter smaller than that of the can body at the opening of the can body, and a screw portion is formed at the mouth portion. It is widely used as a bottle container with a screw cap that can be re-plugged at the mouth.
  • a base plate made of a metal material such as aluminum, aluminum alloy, or steel is punched into a circular shape and drawn to obtain a bottomed cylindrical cup-shaped body, which is further processed. After drawing and ironing (DI molding) to obtain a bottomed cylindrical can body, a tapered shoulder and cylindrical mouth are formed in the necking process, and then screwing and the like are performed. Manufactured by molding the including mouth.
  • a screw portion 110 having a male screw shape is formed at the mouth portion of such a bottle can, and a skirt portion 130 that bulges outward in the radial direction is formed below the screw portion 110.
  • the locking portion 120 to be provided is formed in an annular shape over the entire circumference around the can shaft.
  • the locking portion 120 is a portion where the hem portion 153 of the screw cap with a bridge (hereinafter, simply referred to as “cap”) 150 is rolled-on molded, and contracts inward in the radial direction below the bulging skirt portion 130.
  • the shape is such that the hem portion 153 of the cap 150 having the bead portion 140 having a diameter and being bent inward in the radial direction can be locked.
  • the cap 150 is wrapped around the mouth 101 in the capping step. Specifically, the mouth 101 is covered with a climax tubular cap 150, and a downward load is applied to the cap 150 to seal the inside of the bottle can 100, and the peripheral wall of the cap 150 is maintained while maintaining this sealed state.
  • a thread roller is pressed inward in the radial direction at a height position corresponding to the threaded portion 110 against the upper portion of the portion 152, and is rolled in the circumferential direction around the can axis to be screwed onto the peripheral wall portion 152 of the cap 150.
  • a female screw shape that matches the male screw shape of the portion 110 is formed, and a skirt roller is used inward in the radial direction at a height position facing the skirt portion 130 and the bead portion 140 with respect to the lower end of the peripheral wall portion 152 of the cap 150.
  • the hem portion 153 of the cap 150 is rolled-on-molded by rolling around the entire circumference of the can shaft while applying a load to the cap 150, whereby the hem portion 153 of the cap 150 is in close contact with the skirt portion 130 and the bead portion 140. It is stopped (see, for example, Patent Document 1).
  • the two skirt rollers face each other and apply a load inward in the radial direction, so that the bottle can If the strength of the mouth portion is low, the degree of deformation of the mouth portion 101 from a perfect circle to an ellipse in a plan view may be greater.
  • the mouth portion 101 is greatly deformed, the hem portion 153 of the cap 150 is excessively deformed in the radial direction due to the deformation of the mouth portion 101, so that the bridge is broken and the consumer can accurately judge whether or not the cap is opened.
  • the sealing point cannot be formed easily, the holding force of the cap is insufficient, and the sealing cannot be sufficiently performed, resulting in leakage.
  • the present invention solves the above problems, and an object of the present invention is to suppress deformation of the mouth portion in the capping process even when the original plate for forming a bottle can is thinned. It is an object of the present invention to provide bottle cans and bottle containers that can prevent the occurrence of capping defects such as broken bridges and leakage of filled contents.
  • the bottle can of the present invention is a bottomed tubular bottle can having a mouth portion at the top.
  • the mouth portion is perpendicular to the screw portion to which the screw cap is screwed, the annular locking portion in which the hem portion of the screw cap is locked below the screw portion, and the lower portion of the locking portion.
  • 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)
  • the radius difference between the maximum outer diameter and the minimum outer diameter of the locking portion (bead depth).
  • the bottle container of the present invention is a bottle container having a bottomed tubular bottle can having a mouth portion at the top and a screw cap attached to the mouth portion of the bottle can.
  • the bottle can is the bottle can
  • a female screw portion that can be screwed into the male screw shape of the screw portion of the bottle can is formed on the peripheral wall portion of the eclipsed tubular cap body having the top plate portion and the peripheral wall portion hanging from the outer peripheral edge of the screw cap.
  • a hem portion that is locked to the skirt portion of the bottle can is provided below the female screw portion.
  • 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)
  • the hem of the cap is locked.
  • the radius difference (bead depth) between the maximum outer diameter and the minimum outer diameter of the annular locking portion is C (mm)
  • the equation (1): A ⁇ B ⁇ C> 12.7 is satisfied.
  • the radius difference (bead depth) C between the maximum outer diameter and the minimum outer diameter of the locking portion is 1.30 mm or more, so that the peripheral wall portion of the cap is formed in the capping step. Since it is possible to reliably suppress the load applied to the mouth portion of the bottle can through the lower end of the bottle can, it is possible to more reliably suppress the deformation of the mouth portion in the capping process. According to the third aspect of the present invention, it is possible to suppress the occurrence of elliptical deformation on the slope constituting the locking portion when an inward load is applied to the locking portion in the capping step.
  • the bottle can is formed through the lower end of the peripheral wall portion of the cap in the capping step. Since it is possible to reliably suppress the application of a load to the mouth portion, it is possible to reliably suppress the deformation of the mouth portion in the capping process.
  • the bottle container includes a bottomed tubular bottle can 100 which is filled with contents such as a beverage and has a mouth 101 at the top, and the bottle can. It has a screw cap 150 that is attached to the mouth 101 of 100 and seals the bottle can 100.
  • the bottle can 100 is made of a metal material such as aluminum, an aluminum alloy, and steel.
  • the bottle can 100 has a can body (not shown) and a can bottom (not shown), and the can body has a columnar body (not shown) continuous with the can bottom and an upper part from the body.
  • a mouth having a diameter smaller than that of the can body is erected via a tapered shoulder portion 102 (see FIG. 2) that contracts inward in the radial direction toward the can and a vertical portion 144 that hangs above the shoulder portion 102. It has a unit 101.
  • a threaded portion 110 having a male screw shape is formed in the mouth portion 101 by combining a plurality of curved portions having a substantially arcuate cross section to which the cap 150 can be screwed, and a hem of the cap 150 is formed below the threaded portion 110.
  • a locking portion 120 in which the portion 153 is locked by roll-on molding is formed in an annular shape over the entire circumference of the can shaft. As shown in FIG. 2, the locking portion 120 includes a skirt portion 130 formed at a position adjacent to the lower side of the screw portion 110 and a bead portion 140 formed at a continuous position below the skirt portion 130. Have.
  • the skirt portion 130 is an annular convex portion formed by bulging outward in the radial direction (left in FIG.
  • the bead portion 140 is an annular recess formed in which the diameter is reduced inward in the radial direction (to the right in FIG. 2) and the diameter is reduced in the direction opposite to that of the skirt portion 130 over the entire circumference around the can shaft. Further, on the opening edge of the upper end of the mouth portion 101, a curl portion 103 folded downward from the outside in the radial direction is formed in an annular shape over the entire circumference around the can shaft.
  • the skirt portion 130 has an upper slope 131 that goes outward in the radial direction as it goes downward, a wall surface 132 that extends substantially vertically from the upper slope 131, and a lower surface that continues from the wall surface 132. It has a lower slope 133 that goes inward in the radial direction as it goes toward, and each side (each face) has a cross-sectional shape that is continuous in a smooth arc shape, and the upper slope 131 is continuous with the lower end of the threaded portion 110. ing. Further, the lower slope 133 has a substantially straight cross section.
  • the bead portion 140 is continuous with the lower slope 133 of the skirt portion 130 in a vertical cross section along the can axis, and is continuous with the upper slope 141 having a substantially straight cross section inward in the radial direction as it goes downward and the upper slope 141. It has a wall surface 142 extending substantially in the vertical direction and a lower slope 143 that extends outward in the radial direction as it goes downward from the wall surface 142, and each side (each surface) has a smooth arcuate continuous cross-sectional shape. It is a thing.
  • a vertically extending vertical portion 144 is connected below the lower slope 143 of the bead portion 140, whereby the locking portion 120 and the shoulder portion 102 are connected via the vertical portion 144.
  • the upper slope 141 of the bead portion 140 is formed so as to coincide with the extension line of the lower slope 133 of the skirt portion 130, and the lower slope 133 of the skirt portion 130 and the upper slope 141 of the bead portion 140 are formed.
  • the hem portion 153 of the cap 150 is roll-on molded and the hem portion 153 is bent inward in the radial direction, so that the cap 150 is locked.
  • the diameter of the mouth portion 101 of the bottle can 100 is A (mm)
  • the plate thickness of the original plate for forming the bottle can 100 is B (mm)
  • the maximum outer diameter and the minimum outer diameter of the locking portion 120 are satisfied. Equation (1): A ⁇ B ⁇ C> 12.7
  • the diameter of the mouth portion 101 of the bottle can 100 means the maximum outer diameter of the curl portion 103.
  • the maximum outer diameter of the locking portion 120 means the maximum outer diameter of the skirt portion 130, that is, the maximum bulging diameter, and in the present embodiment, means the maximum outer diameter of the wall surface 132.
  • the minimum outer diameter of the locking portion 120 means the minimum outer diameter of the bead portion 140, and in the present embodiment, means the minimum outer diameter of the wall surface 142.
  • the bead depth (indicated by 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. Will be done.
  • the bead depth is 1.30 mm or more, it is possible to reliably suppress the 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 in the capping step. If the bead depth is too small, a load is applied to the mouth portion 101 via the hem portion 153 of the cap 150 during roll-on molding, which may cause deformation of the mouth portion 101.
  • 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 shaft is, for example, 4.42 mm.
  • the diameter of the mouth 101 of the bottle 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 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. it can.
  • the inclination angle ⁇ of the lower slope 133 of the skirt portion 130 and the upper slope 141 of the bead portion 140 is set to, for example, 48.7 ° with respect to the can axis.
  • the maximum outer diameter of the locking portion 120 that is, the maximum outer diameter of the skirt portion 130 and the outer diameter (maximum outer diameter) of the vertical portion 144 can be substantially the same. Since the maximum outer diameter of the skirt portion 130 and the outer diameter of the vertical portion 144 are substantially the same size, a downward load and a radial inward direction are applied to the locking portion 120 along the can axis in the capping process. When a load is applied, it is possible to suppress the occurrence of elliptical deformation on the upper slope 141, the wall surface 142 and the lower slope 143 constituting the bead portion 140, so that a sufficient holding force of the cap can be obtained.
  • the cap 150 is a female threaded portion screwed into the peripheral wall portion 152 of the eclipsed tubular metal cap body having the top plate portion 151 and the peripheral wall portion 152 hanging from the outer peripheral edge in the male thread shape of the threaded portion 110 of the bottle can 100. Is formed, and a hem portion 153 that is locked to the locking portion 120 of the bottle can 100 is formed below the female screw portion.
  • a sealing member 154 made of a soft resin or the like for sealing the open end surface of the bottle can 100 is sandwiched on the back surface of the top plate portion 151 inside the cap 150.
  • a base plate made of a metal material such as aluminum, aluminum alloy, or steel is punched into a circular shape and drawn to obtain a bottomed cylindrical cup-shaped body, which is further drawn and ironed (DI).
  • DI ironed
  • a tapered shoulder portion and a cylindrical mouth portion are formed in a necking process, and then the mouth portion including screw processing is formed. By doing so, it is manufactured as a seamless unit.
  • the bottle container is manufactured by filling the inside of the bottle can 100 with contents such as beverages, and fitting a climax tubular cap 150 to the mouth 101 by a capping device.
  • the cap 150 In the capping step of attaching the cap 150 to the bottle can 100, the cap 150 is covered so that the sealing member 154 comes into contact with the open end surface of the mouth portion 101, and a downward load is applied to the cap 150 to enter the bottle can 100. Is sealed, and while maintaining this sealed state, the thread roller is pressed inward in the radial direction at a height position corresponding to the threaded portion 110 against the upper portion of the peripheral wall portion 152 of the cap 150, and the circumference around the can axis. By rolling in the direction, a screwed state is formed while forming a female screw shape that matches the male screw shape of the screw portion 110 on the peripheral wall of the cap 150, and the skirt portion 130 is formed with respect to the lower end of the peripheral wall of the cap 150.
  • the hem portion 153 of the cap 150 is roll-on molded by rolling around the entire circumference of the can axis while applying a load inward in the radial direction by a skirt roller at a height position facing the boundary between the bead portion 140 and the bead portion 140.
  • the hem portion 153 of the cap 150 is brought into close contact with and locked to the skirt portion 130 and the bead portion 140.
  • the diameter A (mm) of the mouth portion 101 of the bottle can 100, the plate thickness B (mm) of the original plate for forming the bottle can, and the hem portion 153 are locked. Since the radius difference (bead depth) C (mm) between the maximum outer diameter and the minimum outer diameter of the annular locking portion 120 is satisfied with the formula (1): A ⁇ B ⁇ C> 12.7, in the capping step.
  • the hem portion 153 of the cap 150 is wound around the locking portion 120 to form a shape that can be locked, when a load is applied inward in the radial direction to the lower end of the peripheral wall portion 152 of the cap 150.
  • the thickness of the original plate for forming the bottle can 100 is thin. Even when the bottle is made, deformation of the mouth 101 in the capping process can be suppressed, sufficient holding power of the cap 150 can be obtained, and capping defects such as breakage of the bridge and leakage of the filled contents can be obtained. Occurrence can be prevented.
  • the bottle can and the bottle container according to the embodiment of the present invention have been described above, 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. it can.
  • the specific shapes of the skirt portion 130 and the bead portion 140 are such that the hem portion 153 of the cap 150 can be rolled-on molded and locked to the locking portion 120, each surface is not flat. It may be arcuately curved.
  • the bottle can may have a can body and a can bottom formed as separate bodies.
  • the average value was 2.28 mm. The results are shown in FIG. If the amount of deflection is 2.65 mm or less, it is considered that the occurrence of capping defects is suppressed and it can withstand practical use.
  • the amount of deflection is smaller than 2.65 mm, which may cause capping defects, and the weight can be reduced.
  • the same strength (deflection resistance) as that of a bottle can using a thick original plate such as the bottle can [5] according to Reference Example 1 can be obtained.
  • the bottle can [6] according to Comparative Example 1 it was confirmed that the amount of deflection was as large as 3.18 mm and sufficient strength (deflection resistance) could not be obtained.

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

Abstract

The present invention addresses the problem of providing a bottle can and a bottle container in which it is possible to inhibit deformation of an opening in a capping step and to prevent the occurrence of capping defects such as bridge breakage or leaking of contents filling the bottle can, even when a source sheet for forming the bottle can is reduced in thickness.　This bottle can 100 is a bottomed bottle can having an opening 101 in the upper part thereof, wherein the bottle can is characterized in that: the opening has a thread section 110 on which a screw-cap 150 is threaded, and an annular engagement section 120 with which a bottom section 153 of the screw-cap is engaged below the thread section; and the relationship A × B × C > 12.7, where A (mm) is the opening diameter of the opening of the bottle can, B (mm) is the sheet thickness of the source sheet for forming the bottle can, and C (mm) is the radial distance (bead depth) between the largest outside diameter of the engagement section and the smallest outside diameter thereof.

Description

ボトル缶およびボトル容器Bottle cans and bottle containers
　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 in which the hem of the screw cap is locked below the screw portion in the mouth portion.
　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。 A metal bottle can used as a beverage container has a can body and a can bottom, has a mouth portion having a diameter smaller than that of the can body at the opening of the can body, and a screw portion is formed at the mouth portion. It is widely used as a bottle container with a screw cap that can be re-plugged at the mouth. Generally, in such a bottle can, a base plate made of a metal material such as aluminum, aluminum alloy, or steel is punched into a circular shape and drawn to obtain a bottomed cylindrical cup-shaped body, which is further processed. After drawing and ironing (DI molding) to obtain a bottomed cylindrical can body, a tapered shoulder and cylindrical mouth are formed in the necking process, and then screwing and the like are performed. Manufactured by molding the including mouth.
　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。）。 As shown in FIG. 1, a screw portion 110 having a male screw shape is formed at the mouth portion of such a bottle can, and a skirt portion 130 that bulges outward in the radial direction is formed below the screw portion 110. The locking portion 120 to be provided is formed in an annular shape over the entire circumference around the can shaft. The locking portion 120 is a portion where the hem portion 153 of the screw cap with a bridge (hereinafter, simply referred to as “cap”) 150 is rolled-on molded, and contracts inward in the radial direction below the bulging skirt portion 130. The shape is such that the hem portion 153 of the cap 150 having the bead portion 140 having a diameter and being bent inward in the radial direction can be locked.
In such a bottle can 100, after the contents such as beverages are filled in the bottle can 100, the cap 150 is wrapped around the mouth 101 in the capping step. Specifically, the mouth 101 is covered with a climax tubular cap 150, and a downward load is applied to the cap 150 to seal the inside of the bottle can 100, and the peripheral wall of the cap 150 is maintained while maintaining this sealed state. A thread roller is pressed inward in the radial direction at a height position corresponding to the threaded portion 110 against the upper portion of the portion 152, and is rolled in the circumferential direction around the can axis to be screwed onto the peripheral wall portion 152 of the cap 150. A female screw shape that matches the male screw shape of the portion 110 is formed, and a skirt roller is used inward in the radial direction at a height position facing the skirt portion 130 and the bead portion 140 with respect to the lower end of the peripheral wall portion 152 of the cap 150. The hem portion 153 of the cap 150 is rolled-on-molded by rolling around the entire circumference of the can shaft while applying a load to the cap 150, whereby the hem portion 153 of the cap 150 is in close contact with the skirt portion 130 and the bead portion 140. It is stopped (see, for example, Patent Document 1).
特開２００４－２７６９９０号公報Japanese Unexamined Patent Publication No. 2004-276990
　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。 On the other hand, for such bottle cans, for the purpose of reducing the environmental load of reducing CO 2 emissions during manufacturing and transportation of bottle cans, and for the purpose of reducing costs by reducing the amount of metal materials used, etc. Weight reduction is being promoted.
However, in order to realize the weight reduction 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 is reduced due to the weight reduction (thinning). Specifically, when the hem portion 153 of the cap 150 is roll-on formed along the outer shape of the locking portion 120, the two skirt rollers face each other and apply a load inward in the radial direction, so that the bottle can If the strength of the mouth portion is low, the degree of deformation of the mouth portion 101 from a perfect circle to an ellipse in a plan view may be greater. When the mouth portion 101 is greatly deformed, the hem portion 153 of the cap 150 is excessively deformed in the radial direction due to the deformation of the mouth portion 101, so that the bridge is broken and the consumer can accurately judge whether or not the cap is opened. There is a possibility that the sealing point cannot be formed easily, the holding force of the cap is insufficient, and the sealing cannot be sufficiently performed, resulting in 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 solves the above problems, and an object of the present invention is to suppress deformation of the mouth portion in the capping process even when the original plate for forming a bottle can is thinned. It is an object of the present invention to provide bottle cans and bottle containers that can prevent the occurrence of capping defects such as broken bridges and leakage of filled contents.
　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）を満たすことを特徴とする。
　式（１）：Ａ×Ｂ×Ｃ＞１２．７ The bottle can of the present invention is a bottomed tubular bottle can having a mouth portion at the top.
The mouth portion is perpendicular to the screw portion to which the screw cap is screwed, the annular locking portion in which the hem portion of the screw cap is locked below the screw portion, and the lower portion of the locking portion. Has a vertical part that extends to
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 radius difference between the maximum outer diameter and the minimum outer diameter of the locking portion (bead depth). ) Is C (mm), and the following equation (1) is satisfied.
Equation (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 tubular bottle can having a mouth portion at the top and a screw cap attached to the mouth portion of the bottle can.
The bottle can is the bottle can
A female screw portion that can be screwed into the male screw shape of the screw portion of the bottle can is formed on the peripheral wall portion of the eclipsed tubular cap body having the top plate portion and the peripheral wall portion hanging from the outer peripheral edge of the screw cap. A hem portion that is locked to the skirt portion of the bottle can is provided below the female screw 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 the bottle container of the present invention, 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 hem of the cap is locked. When the radius difference (bead depth) between the maximum outer diameter and the minimum outer diameter of the annular locking portion is C (mm), the equation (1): A × B × C> 12.7 is satisfied. In the capping process, when the hem of the cap is wound around the locking part to form a shape that can be locked, it is locked when a load is applied inward in the radial direction to the lower end of the peripheral wall of the cap. Since it is suppressed that a load is applied to the bead portion having a convex shape in the radial direction of the portion through the lower end of the peripheral wall portion of the cap, it is a case where the original plate for forming the bottle can is thinned. However, the deformation of the mouth portion in the capping process can be suppressed, a sufficient holding force of the cap can be obtained, and the occurrence of capping defects such as breakage of the bridge and leakage of the 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 second aspect of the present invention, the radius difference (bead depth) C between the maximum outer diameter and the minimum outer diameter of the locking portion is 1.30 mm or more, so that the peripheral wall portion of the cap is formed in the capping step. Since it is possible to reliably suppress the load applied to the mouth portion of the bottle can through the lower end of the bottle can, it is possible to more reliably suppress the deformation of the mouth portion in the capping process.
According to the third aspect of the present invention, it is possible to suppress the occurrence of elliptical deformation on the slope constituting the locking portion when an inward load is applied to the locking portion in the capping step. Therefore, a sufficient holding force of the cap can be obtained, and it is possible to more reliably prevent the occurrence of capping defects such as leakage of the filled contents.
According to the fourth aspect of the present invention, even if the diameter A of the mouth portion of the bottle can is 33.0 to 34.0 mm, the bottle can is formed through the lower end of the peripheral wall portion of the cap in the capping step. Since it is possible to reliably suppress the application of a load to the mouth portion, it is possible to reliably suppress the deformation of the mouth portion in 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。It is a partial cross-sectional view which shows the bottle can which concerns on one Embodiment of this invention in the state which attached the cap. 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。It is an end view which shows a part of the locking part of the bottle can which concerns on one Embodiment of this 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。It is a bar graph which shows the deflection amount of the bottle can which concerns on Example and comparative example of this invention.
　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。 Hereinafter, the present invention will be described in detail.
As shown in FIG. 1, the bottle container according to the embodiment of the present invention includes a bottomed tubular bottle can 100 which is filled with contents such as a beverage and has a mouth 101 at the top, and the bottle can. It has a screw cap 150 that is attached to the mouth 101 of 100 and seals 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 can 100 according to the embodiment of the present invention is made of a metal material such as aluminum, an aluminum alloy, and steel.
The bottle can 100 has a can body (not shown) and a can bottom (not shown), and the can body has a columnar body (not shown) continuous with the can bottom and an upper part from the body. A mouth having a diameter smaller than that of the can body is erected via a tapered shoulder portion 102 (see FIG. 2) that contracts inward in the radial direction toward the can and a vertical portion 144 that hangs above the shoulder portion 102. It has a unit 101.
　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。 A threaded portion 110 having a male screw shape is formed in the mouth portion 101 by combining a plurality of curved portions having a substantially arcuate cross section to which the cap 150 can be screwed, and a hem of the cap 150 is formed below the threaded portion 110. A locking portion 120 in which the portion 153 is locked by roll-on molding is formed in an annular shape over the entire circumference of the can shaft.
As shown in FIG. 2, the locking portion 120 includes a skirt portion 130 formed at a position adjacent to the lower side of the screw portion 110 and a bead portion 140 formed at a continuous position below the skirt portion 130. Have.
The skirt portion 130 is an annular convex portion formed by bulging outward in the radial direction (left in FIG. 2) over the entire circumference around the can axis, and the outer diameter of the skirt portion 130 is, for example, the screw portion 110. Larger than the outer diameter.
The bead portion 140 is an annular recess formed in which the diameter is reduced inward in the radial direction (to the right in FIG. 2) and the diameter is reduced in the direction opposite to that of the skirt portion 130 over the entire circumference around the can shaft.
Further, on the opening edge of the upper end of the mouth portion 101, a curl portion 103 folded downward from the outside in the radial direction is formed in an annular shape over the entire circumference around the can shaft.
　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 the vertical cross section along the can axis, the skirt portion 130 has an upper slope 131 that goes outward in the radial direction as it goes downward, a wall surface 132 that extends substantially vertically from the upper slope 131, and a lower surface that continues from the wall surface 132. It has a lower slope 133 that goes inward in the radial direction as it goes toward, and each side (each face) has a cross-sectional shape that is continuous in a smooth arc shape, and the upper slope 131 is continuous with the lower end of the threaded portion 110. ing. Further, the lower slope 133 has a substantially straight cross section.
The bead portion 140 is continuous with the lower slope 133 of the skirt portion 130 in a vertical cross section along the can axis, and is continuous with the upper slope 141 having a substantially straight cross section inward in the radial direction as it goes downward and the upper slope 141. It has a wall surface 142 extending substantially in the vertical direction and a lower slope 143 that extends outward in the radial direction as it goes downward from the wall surface 142, and each side (each surface) has a smooth arcuate continuous cross-sectional shape. It is a thing. A vertically extending vertical portion 144 is connected below the lower slope 143 of the bead portion 140, whereby the locking portion 120 and the shoulder portion 102 are connected via the vertical portion 144.
In the present embodiment, the upper slope 141 of the bead portion 140 is formed so as to coincide with the extension line of the lower slope 133 of the skirt portion 130, and the lower slope 133 of the skirt portion 130 and the upper slope 141 of the bead portion 140 are formed. On the other hand, the hem portion 153 of the cap 150 is roll-on molded and the hem portion 153 is bent inward in the radial direction, so that the cap 150 is locked.
　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 the present embodiment, the diameter of the mouth portion 101 of the bottle can 100 is A (mm), the plate thickness of the original plate for forming the bottle can 100 is B (mm), and the maximum outer diameter and the minimum outer diameter of the locking portion 120. When the radius difference (bead depth) from the diameter is C (mm), the following equation (1) is satisfied.
Equation (1): A × B × C> 12.7
The diameter of the mouth portion 101 of the bottle can 100 means the maximum outer diameter of the curl portion 103.
The maximum outer diameter of the locking portion 120 means the maximum outer diameter of the skirt portion 130, that is, the maximum bulging diameter, and in the present embodiment, means the maximum outer diameter of the wall surface 132.
The minimum outer diameter of the locking portion 120 means the minimum outer diameter of the bead portion 140, and in the present embodiment, means 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 by 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. Will be done.
When the bead depth is 1.30 mm or more, it is possible to reliably suppress the 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 in the capping step. If the bead depth is too small, a load is applied to the mouth portion 101 via the hem portion 153 of the cap 150 during roll-on molding, which may cause deformation of the mouth portion 101. On the other hand, when the bead depth is excessive, molding becomes severe and there is a possibility that molding defects such as cracks may occur in the bead portion 140 and the like.
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 shaft 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 101 of the bottle 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 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. it can.
Further, in the present embodiment, the inclination angle θ of the lower slope 133 of the skirt portion 130 and the upper slope 141 of the bead portion 140 is set to, for example, 48.7 ° with respect to the can axis.
　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。 Further, the maximum outer diameter of the locking portion 120, that is, the maximum outer diameter of the skirt portion 130 and the outer diameter (maximum outer diameter) of the vertical portion 144 can be substantially the same.
Since the maximum outer diameter of the skirt portion 130 and the outer diameter of the vertical portion 144 are substantially the same size, a downward load and a radial inward direction are applied to the locking portion 120 along the can axis in the capping process. When a load is applied, it is possible to suppress the occurrence of elliptical deformation on the upper slope 141, the wall surface 142 and the lower slope 143 constituting the bead portion 140, so that a sufficient holding force of the cap can be obtained. This bends inward in the radial direction even when the upper slope 141 (lower slope 133 in the skirt portion 130) and the lower slope 143 of the bead portion 140 are balanced and a load is applied inward in the radial direction. It is presumed that this is because it becomes difficult and deformation in the vertical direction is suppressed, and the axial load strength is improved.
　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 female threaded portion screwed into the peripheral wall portion 152 of the eclipsed tubular metal cap body having the top plate portion 151 and the peripheral wall portion 152 hanging from the outer peripheral edge in the male thread shape of the threaded portion 110 of the bottle can 100. Is formed, and a hem portion 153 that is locked to the locking portion 120 of the bottle can 100 is formed below the female screw portion. A sealing member 154 made of a soft resin or the like for sealing the open end surface of the bottle can 100 is sandwiched on the back surface of the top plate portion 151 inside the cap 150.
　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。 In the bottle can 100, a base plate made of a metal material such as aluminum, aluminum alloy, or steel is punched into a circular shape and drawn to obtain a bottomed cylindrical cup-shaped body, which is further drawn and ironed (DI). After (molding) to obtain a bottomed cylindrical can body, a tapered shoulder portion and a cylindrical mouth portion are formed in a necking process, and then the mouth portion including screw processing is formed. By doing so, it is manufactured as a seamless unit.
The bottle container is manufactured by filling the inside of the bottle can 100 with contents such as beverages, and fitting a climax tubular cap 150 to the mouth 101 by a capping device.
In the capping step of attaching the cap 150 to the bottle can 100, the cap 150 is covered so that the sealing member 154 comes into contact with the open end surface of the mouth portion 101, and a downward load is applied to the cap 150 to enter the bottle can 100. Is sealed, and while maintaining this sealed state, the thread roller is pressed inward in the radial direction at a height position corresponding to the threaded portion 110 against the upper portion of the peripheral wall portion 152 of the cap 150, and the circumference around the can axis. By rolling in the direction, a screwed state is formed while forming a female screw shape that matches the male screw shape of the screw portion 110 on the peripheral wall of the cap 150, and the skirt portion 130 is formed with respect to the lower end of the peripheral wall of the cap 150. The hem portion 153 of the cap 150 is roll-on molded by rolling around the entire circumference of the can axis while applying a load inward in the radial direction by a skirt roller at a height position facing the boundary between the bead portion 140 and the bead portion 140. The hem portion 153 of the cap 150 is brought into close contact with and locked to 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 can 100 and the bottle container as described above, the diameter A (mm) of the mouth portion 101 of the bottle can 100, the plate thickness B (mm) of the original plate for forming the bottle can, and the hem portion 153 are locked. Since the radius difference (bead depth) C (mm) between the maximum outer diameter and the minimum outer diameter of the annular locking portion 120 is satisfied with the formula (1): A × B × C> 12.7, in the capping step. When the hem portion 153 of the cap 150 is wound around the locking portion 120 to form a shape that can be locked, when a load is applied inward in the radial direction to the lower end of the peripheral wall portion 152 of the cap 150. Since it is suppressed that a load is applied to the bead portion 140 having a convex shape inward in the radial direction of the locking portion 120 via the lower end of the peripheral wall portion 152 of the cap 150, the thickness of the original plate for forming the bottle can 100 is thin. Even when the bottle is made, deformation of the mouth 101 in the capping process can be suppressed, sufficient holding power of the cap 150 can be obtained, and capping defects such as breakage of the bridge and leakage of the filled contents can be obtained. Occurrence 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。 Although the bottle can and the bottle container according to the embodiment of the present invention have been described above, 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. it can.
For example, if the specific shapes of the skirt portion 130 and the bead portion 140 are such that the hem portion 153 of the cap 150 can be rolled-on molded and locked to the locking portion 120, each surface is not flat. It may be arcuately curved.
Further, for example, the bottle can may have a can body and a can bottom formed as separate bodies.
　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 thereto.
[Example 1]
Ten bottle cans [1] shown in FIGS. 1 and 2 were produced with the following specifications.
・ Capacity: 300mL
-Original plate material: Aluminum alloy-Original plate thickness: 0.315 mm
・ Mouth diameter: 33.45 mm
-Maximum outer diameter of locking part (maximum outer diameter of skirt part): 37.80 mm
-Minimum outer diameter of the locking part (minimum outer diameter of the bead part): 34.90 mm
-Radius difference (bead depth) between the maximum outer diameter and the minimum outer diameter of the locking part: 1.45 mm
・ Angle of the lower slope of the skirt: 48.7 °
A × B × C = 15.3 (> 12.7), and for the obtained 10 bottle cans, the locking portion was laterally compressed with a load of about 111 N from the left and right, and the initial bead portion in a plan view was obtained. As a result of measuring the difference between the minimum outer diameter of the bead portion and the minimum outer diameter of the bead portion after lateral compression (hereinafter referred to as "deflection amount"), the average value was 2.28 mm. The results are shown in FIG. If the amount of deflection is 2.65 mm or less, it is considered that the occurrence of capping defects is suppressed and it can withstand practical use.
〔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]
In the first embodiment, the bottle can [2] is set to 10 in the same manner except that the minimum outer diameter of the locking portion is changed to set the radius difference (bead depth) between the maximum outer diameter and the minimum outer diameter to 1.30 mm. I made a can.
A × B × C = 13.7 (> 12.7), and when the amount of deflection of the obtained 10 bottle cans was measured in the same manner as in Example 1, the average value was 2.55 mm. .. The results are shown in FIG.
〔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]
In the first embodiment, the bottle can [3] is set to 10 in the same manner except that the minimum outer diameter of the locking portion is changed so that the radius difference (bead depth) between the maximum outer diameter and the minimum outer diameter is 1.50 mm. I made a can.
A × B × C = 15.8 (> 12.7), and when the amount of deflection of the obtained 10 bottle cans was measured in the same manner as in Example 1, the average value was 2.28 mm. .. The results are shown in FIG.
〔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]
In the first embodiment, the bottle can [4] is set to 10 in the same manner except that the minimum outer diameter of the locking portion is changed so that the radius difference (bead depth) between the maximum outer diameter and the minimum outer diameter is 1.80 mm. I made a can.
A × B × C = 19.0 (> 12.7), and when the amount of deflection of the obtained 10 bottle cans was measured in the same manner as in Example 1, 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]
In the first embodiment, the bottle can [5] is set to 10 in the same manner except that the minimum outer diameter of the locking portion is changed to set the radius difference (bead depth) between the maximum outer diameter and the minimum outer diameter to 1.20 mm. I made a can.
A × B × C = 12.6 (<12.7), and when the amount of deflection of the obtained 10 bottle cans was measured in the same manner as in Example 1, the average value was 3.18 mm. .. The results are shown in FIG.
〔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]
Except for the fact that the original plate used in Example 1 has a plate thickness of 0.345 mm and the minimum outer diameter of the locking portion is changed so that the radius difference (bead depth) between the maximum outer diameter and the minimum outer diameter is 1.20 mm. Made 10 bottle cans [6] in the same manner.
A × B × C = 13.8 (> 12.7), and when the amount of deflection of the obtained 10 bottle cans was measured in the same manner as in Example 1, the average value was 2.30 mm. .. The results are shown in FIG.
　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 cans [1] to [4] of the present invention, the amount of deflection is smaller than 2.65 mm, which may cause capping defects, and the weight can be reduced. Although possible, it was confirmed that the same strength (deflection resistance) as that of a bottle can using a thick original plate such as the bottle can [5] according to Reference Example 1 can be obtained.
On the other hand, in the bottle can [6] according to Comparative Example 1, it was confirmed that the amount of deflection was as large as 3.18 mm and sufficient strength (deflection resistance) could not be 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
 
  100 Bottle can 101 Mouth 102 Shoulder 103 Curl 110 Thread 120 Locking 130 Skirt 131 Upper slope 132 Wall 133 Lower slope 140 Bead part 141 Upper slope 142 Wall surface 143 Lower slope 144 Vertical part 150 Cap 151 Top plate part 152 Peripheral wall 153 Hem 154 Sealing member

Claims (5)

  1. 　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）を満たすことを特徴とするボトル缶。
    　式（１）：Ａ×Ｂ×Ｃ＞１２．７     A bottomed tubular bottle can with a mouth at the top.
    The mouth portion is perpendicular to the screw portion to which the screw cap is screwed, the annular locking portion in which the hem portion of the screw cap is locked below the screw portion, and the lower portion of the locking portion. Has a vertical part that extends to
    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 radius difference (bead depth) between the maximum outer diameter and the minimum outer diameter of the locking portion. ) Is C (mm), and the bottle can satisfies the following formula (1).
    Equation (1): A × B × C> 12.7
  2. 　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 can according to claim 1, wherein the radius difference (bead depth) C between the maximum outer diameter and the minimum outer diameter of the locking portion is 1.30 mm or more.
  3. 　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 can according to claim 1 or 2, wherein the maximum outer diameter of the locking portion and the outer diameter of the vertical portion are substantially the same.
  4. 　前記ボトル缶の口部の口径Ａが３３．０～３４．０ｍｍであることを特徴とする請求項１乃至請求項３のいずれかに記載のボトル缶。 The bottle can according to any one of claims 1 to 3, wherein the diameter A of the mouth portion of the bottle can is 33.0 to 34.0 mm.
  5. 　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、請求項１乃至請求項４のいずれかに記載のボトル缶であり、
    　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。
     
          A bottle container having a bottomed tubular bottle can having a mouth portion at the top and a screw cap attached to the mouth portion of the bottle can.
    The bottle can is the bottle can according to any one of claims 1 to 4.
    A female screw portion that can be screwed into the male screw shape of the screw portion of the bottle can is formed on the peripheral wall portion of the eclipsed tubular cap body having the top plate portion and the peripheral wall portion hanging from the outer peripheral edge of the screw cap. , A bottle container having a hem that is locked to the locking portion of the bottle can below the female screw portion.
PCT/JP2020/036327 2019-12-10 2020-09-25 Bottle can and bottle container WO2021117317A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021563756A JPWO2021117317A1 (en) 2019-12-10 2020-09-25

Applications Claiming Priority (2)

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