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WO2020054259A1 - Capuchon en résine synthétique - Google Patents

Capuchon en résine synthétique Download PDF

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Publication number
WO2020054259A1
WO2020054259A1 PCT/JP2019/030818 JP2019030818W WO2020054259A1 WO 2020054259 A1 WO2020054259 A1 WO 2020054259A1 JP 2019030818 W JP2019030818 W JP 2019030818W WO 2020054259 A1 WO2020054259 A1 WO 2020054259A1
Authority
WO
WIPO (PCT)
Prior art keywords
peripheral surface
synthetic resin
top wall
container mouth
cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/030818
Other languages
English (en)
Japanese (ja)
Inventor
靖文 黒岩
伸生 川村
淳史 小野
慎吾 梅木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nihon Yamamura Glass Co Ltd
Original Assignee
Nihon Yamamura Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nihon Yamamura Glass Co Ltd filed Critical Nihon Yamamura Glass Co Ltd
Priority to JP2020546755A priority Critical patent/JP7332613B2/ja
Publication of WO2020054259A1 publication Critical patent/WO2020054259A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • 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 synthetic resin cap to be attached to a mouth of a container for storing contents such as beverages.
  • a conventional synthetic resin cap including a cap body having a top wall (top plate portion) and a skirt wall (skirt-like side wall) descended from the periphery thereof, and a middle foot that is in close contact with the inner surface of the container opening on the inner surface of the top wall.
  • An inner ring and an outer foot (outer ring) that is in close contact with the outer surface of the container opening are known (Patent Document 1).
  • the middle foot and the outer foot are in close contact with the inner and outer surfaces of the container mouth, and the hermeticity of the inside of the container is ensured.
  • the present invention has been made in view of the above-mentioned matters, and an object of the present invention is to provide a synthetic resin cap which is effective in preventing cracks and, as a result, capable of improving sealing performance.
  • a synthetic resin cap includes a top wall, a skirt wall extending downward from an outer peripheral portion of the top wall, and having a female screw screwed into a male screw of a container opening.
  • an annular middle foot that closely adheres to the inner peripheral surface of the container mouth
  • an annular outer foot that closely adheres to the outer peripheral surface of the container mouth are integrally formed.
  • the inner peripheral surface of the skirt wall is bent from the upper side, and is turned back to be connected to the outer peripheral surface of the outer foot, an inclined portion whose inner diameter is larger toward the bottom, A constant straight portion, and the inclined portion has a larger vertical width than the folded portion (claim 1).
  • the inner peripheral surface of the outer foot may increase in diameter toward a lower side, and its gradient may be 10 ° or more.
  • a synthetic resin cap that is effective in preventing cracking and that can enhance sealing performance can be obtained.
  • the thickness of the portion of the skirt wall connected to the outer leg is increased, so that the occurrence of cracks when stress is applied is effectively prevented. be able to.
  • the second aspect of the present invention it is easy to improve the sealing performance by increasing the thickness of the vicinity of the base of the outer foot.
  • FIG. 1 is a bottom view schematically showing a configuration of a synthetic resin cap according to one embodiment of the present invention
  • (B) is a sectional view taken along line AA of (A).
  • FIG. 2 is a sectional view taken along line BB of FIG. (A)-(C) is an explanatory view showing a comparison between the conventional example and the synthetic resin cap of the present invention.
  • the synthetic resin cap (hereinafter referred to as cap) 1 shown in FIGS. 1A and 1B and FIG. 2 is used by being attached to a mouth M of a container such as a PET bottle (see FIG. 2). And are integrally formed of polyethylene by compression molding or injection molding.
  • the material for forming the cap 1 is not particularly limited.
  • polypropylene or the like is preferably used.
  • the cap 1 includes a top wall 2 having a substantially circular shape in a plan view, and a substantially cylindrical skirt wall 3 extending downward from an outer peripheral portion of the top wall 2. have.
  • a knurl groove 4 is provided on the outer peripheral surface of the skirt wall 3, and a female screw 5 is provided on the inner peripheral surface.
  • the female screw 5 is connected to a male screw M1 (see FIG. 2) formed on the outer periphery of the container mouth. (Screwing) is possible.
  • annular ring provided on the inner surface (lower surface) of the top wall 2 is formed.
  • the middle foot (inner ring) 6, the annular rib 7, and the annular outer foot (outer ring) 8 are in close contact with the container opening M, whereby the container opening is sealed (see FIG. 3). That is, as shown by the phantom line in FIG. 2, when the cap 1 is attached to the container mouth M, the middle foot 6 is inserted into the container mouth M and closely adheres to the inner peripheral surface of the container mouth M.
  • the annular rib 7 is configured to be in close contact with the annular upper end surface of the container opening M
  • the outer leg 8 is configured to be in close contact with the outer peripheral surface of the container opening M.
  • the cap 1 is a pill fur proof cap having a function to prove that the cap 1 has not been opened (the cap has never been opened).
  • the cap 1 is rotated so that the connection between the male screw M1 and the female screw 5 is released at the time of opening, the cap 1 is detached from the container mouth M, but the tamper evidence connected to the lower part of the skirt wall 3 is obtained.
  • the band (hereinafter, simply referred to as “band”) 9 is configured to remain at the container opening M.
  • a band 9 is connected to the lower part of the skirt wall 3 via an annular weakening portion 10 extending over the entire circumference of the skirt wall 3 (see FIG. 3), and the annular weakening portion 10 is connected to the skirt wall 3 and the band 9.
  • a slit 10b extending in the circumferential direction of the skirt wall 3 and the band 9 so as to vertically define the skirt wall 3 and the band 9, and the bridge 10a
  • a portion (outer peripheral portion) of the bridge 10a is also cut by the slit 10b such that the bridge 10a is broken when pulled by a predetermined force.
  • a plurality (eight in this example) of locking pieces (flaps) 11 protruding inward are provided on the inner peripheral side of the band 9 at intervals in the circumferential direction (see FIGS. 1 and 2). ).
  • Each locking piece 11 is positioned substantially below the annular projection (bead portion) M2 formed below the male screw M1 on the outer periphery of the container mouth M when the cap 1 is attached to the container mouth M. Then, it is locked to the annular projection M2 by the opening operation (see FIG. 3). That is, the locking piece 11 is configured to be lockable from below on the annular projection M2, and the cap main body (the skirt wall 3 and the top wall 2) above the annular weakening portion 10 is opened at the time of opening.
  • the band 9 detached from the M and located below the annular weakened portion 10 remains in the container mouth M, and the annular weakened portion 10 is broken accordingly.
  • the band 9 is integrally formed with the cap body (the skirt wall 3 and the top wall 2), and the locking pieces 11 provided on the band 9 are in a state of protruding upward as shown in FIG.
  • the inner peripheral surface of the skirt wall 3 is bent from the upper side to bend and connected to the outer peripheral surface of the outer foot 8, And a straight portion 14 having a constant inner diameter.
  • the inclined portion 13 has a larger vertical width than the folded portion 12. Specifically, it is conceivable to provide the folded portion 12 so that the vertical width is 0.05 mm to 0.3 mm, and the inclined portion 13 is 0.5 mm to 2.0 mm.
  • the outer peripheral surface of the outer foot 8 is bent from the upper side to have a folded portion 15 connected to the inner peripheral surface of the skirt wall 3, and a slope whose inner diameter becomes smaller toward the lower side.
  • the folded portion 12 of the skirt wall 3 and the folded portion 15 of the outer foot 8 are configured to be located on the same circumference in a longitudinal sectional view, and the radius of curvature of the folded portion 12 is It is smaller than the radius of curvature of the inclined portion 13 in a vertical sectional view.
  • the radii of curvature of the folded portions 12 and 15 in the vertical cross section are 0.1 mm
  • the radii of curvature of the inclined portions 13 in the vertical cross section are 3 mm.
  • FIG. 3C shows a main part of the cap 1 of the present embodiment, and a broken line in this figure indicates the skirt wall 3 of FIG. 3B.
  • the folded portion 50 extending from the skirt wall 3 to the outer foot 8 is curved so as to be located on the same circumference in a longitudinal sectional view. Since the inclined portion 13 is not provided, the radius of curvature of the folded portion 50 is increased, and the thickness of the portion of the skirt wall 3 connected to the outer leg 8 is reduced accordingly.
  • the folded portions 12, 15 from the skirt wall 3 to the outer foot 8 have the same circumference in a longitudinal sectional view as shown in FIG.
  • the area occupied by the folded portions 12 and 15 is reduced, and the skirt wall 3 is made thicker by the amount of the inclined portion 13 provided between the straight portion 14 and the folded portion 12.
  • the inner peripheral surface of the outer leg 8 expands in diameter toward the lower side, and its gradient ⁇ (see the enlarged view in FIG. 2) is 10 ° or more, preferably 12 ° to 16 °.
  • ⁇ is 10 ° or more, preferably 12 ° to 16 °.
  • this improvement in the sealing performance is achieved by increasing the thickness of the portion of the top wall 2 located on the outer peripheral side of the inner peripheral side of the middle foot 6 (particularly, the portion of the top wall 2 between the middle foot 6 and the outer foot 8). It is also enhanced by doing.
  • the vertical cross-sectional shape of the inclined portion 13 is an arc shape.
  • the shape may be inclined. That is, the inclined portion 13 is not located in the same circumferential shape as the folded portions 12 and 15 in the vertical cross section, and has a gentler gradient than the folded portion 12 and extends downward over a wider range than the folded portion 12. The diameter should just be expanded.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

La présente invention concerne un capuchon en résine synthétique qui est efficace pour empêcher la fissuration et qui permet d'améliorer les performances d'étanchéité. Un capuchon en résine synthétique (1) comprend une paroi supérieure (2) et une paroi de jupe (3) s'étendant vers le bas à partir d'une section périphérique externe de la paroi supérieure et présentant un filetage interne (5) où un filetage externe (M1) d'une embouchure de récipient (M) est fileté, le capuchon incluant une patte centrale annulaire (6) en contact étroit avec une surface périphérique interne de l'embouchure de récipient et une patte externe annulaire (8) en contact étroit avec une surface périphérique externe de l'embouchure de récipient qui sont formées d'un seul tenant sur une surface inférieure de la paroi supérieure, la surface périphérique interne de la paroi de jupe incluant une section pliée (12) qui est incurvée depuis le côté supérieur et mène à une surface périphérique externe de la patte extérieure, une section inclinée (13) où le diamètre interne augmente vers le bas et une section droite (14) qui présente un diamètre interne constant ; et la section inclinée présente une largeur supérieure/inférieure plus importante que celle de la section pliée.
PCT/JP2019/030818 2018-09-13 2019-08-06 Capuchon en résine synthétique Ceased WO2020054259A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020546755A JP7332613B2 (ja) 2018-09-13 2019-08-06 合成樹脂製キャップ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-171089 2018-09-13
JP2018171089 2018-09-13

Publications (1)

Publication Number Publication Date
WO2020054259A1 true WO2020054259A1 (fr) 2020-03-19

Family

ID=69777224

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/030818 Ceased WO2020054259A1 (fr) 2018-09-13 2019-08-06 Capuchon en résine synthétique

Country Status (2)

Country Link
JP (1) JP7332613B2 (fr)
WO (1) WO2020054259A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6126027A (en) * 1995-02-21 2000-10-03 Mcg Closures Limited Self-centering container closure
JP2002068236A (ja) * 2000-08-25 2002-03-08 Shibazaki Seisakusho Ltd 合成樹脂製キャップ
JP2009107704A (ja) * 2007-10-31 2009-05-21 Japan Crown Cork Co Ltd プラスチックキャップ
WO2012020637A1 (fr) * 2010-08-09 2012-02-16 日本山村硝子株式会社 Capuchon en résine
JP2014069828A (ja) * 2012-09-28 2014-04-21 Toyo Seikan Kaisha Ltd 包装容器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705717A1 (de) 1997-02-14 1998-08-20 Bericap Gmbh & Co Kg Kunststoffschraubverschluß
JP5977937B2 (ja) 2011-11-21 2016-08-24 株式会社Ｃｓｉジャパン 炭酸飲料充てん容器用合成樹脂製キャップ、閉止装置、および飲料入り閉止装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6126027A (en) * 1995-02-21 2000-10-03 Mcg Closures Limited Self-centering container closure
JP2002068236A (ja) * 2000-08-25 2002-03-08 Shibazaki Seisakusho Ltd 合成樹脂製キャップ
JP2009107704A (ja) * 2007-10-31 2009-05-21 Japan Crown Cork Co Ltd プラスチックキャップ
WO2012020637A1 (fr) * 2010-08-09 2012-02-16 日本山村硝子株式会社 Capuchon en résine
JP2014069828A (ja) * 2012-09-28 2014-04-21 Toyo Seikan Kaisha Ltd 包装容器

Also Published As

Publication number Publication date
JPWO2020054259A1 (ja) 2021-08-30
JP7332613B2 (ja) 2023-08-23

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