WO2018047711A1 - Capuchon en plastique - Google Patents

Capuchon en plastique Download PDF

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Publication number
WO2018047711A1
WO2018047711A1 PCT/JP2017/031441 JP2017031441W WO2018047711A1 WO 2018047711 A1 WO2018047711 A1 WO 2018047711A1 JP 2017031441 W JP2017031441 W JP 2017031441W WO 2018047711 A1 WO2018047711 A1 WO 2018047711A1
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WO
WIPO (PCT)
Prior art keywords
peripheral surface
outer peripheral
taper angle
container mouth
inner peripheral
Prior art date
Application number
PCT/JP2017/031441
Other languages
English (en)
Japanese (ja)
Inventor
広則 見城
淳史 小野
慎吾 梅木
一馬 境野
Original Assignee
日本山村硝子株式会社
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 日本山村硝子株式会社 filed Critical 日本山村硝子株式会社
Priority to JP2018538381A priority Critical patent/JP6932705B2/ja
Publication of WO2018047711A1 publication Critical patent/WO2018047711A1/fr

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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

Definitions

  • the present invention relates to a resin cap that is attached to the mouth of a container that contains contents such as beverages.
  • the conventional resin cap has room for improving moldability and sealing performance.
  • the present invention has been made in consideration of the above-mentioned matters, and an object of the present invention is to provide a resin cap that is excellent in moldability and can also improve the sealing performance.
  • a resin cap according to the present invention comprises a top wall and a skirt wall having a female thread extending downward from an outer peripheral portion of the top wall and screwed into a male thread of a container mouth. And an annular middle foot that is in close contact with the inner peripheral surface of the container mouth portion and an annular outer foot that is in close contact with the outer peripheral surface of the container mouth portion are integrally formed on the lower surface of the top wall. It is a resin cap, the inner peripheral surface of the outer leg expands downward, the outer peripheral surface contracts downward, and the taper angle of the outer peripheral surface is larger than the taper angle of the inner peripheral surface. (Claim 1).
  • the taper angle of the inner peripheral surface may be 5 ° or more and the taper angle of the outer peripheral surface may be 20 ° or less (Claim 2).
  • a portion that needs to be forcibly removed is not formed on the outer foot, so that it is possible to improve the punching property (moldability), and the outer surface of the outer foot. Since the taper angle on the side is larger than the taper angle on the inner surface side and the outer foot is not easily elastically deformed in the diameter-expanding direction, the adhesion force of the outer foot to the container mouth portion is increased, thereby improving the sealing performance.
  • FIG. 2 is a sectional view taken along line AA in FIG. 1.
  • FIG. 2 is a sectional view taken along line BB in FIG.
  • a resin cap (hereinafter referred to as a cap) 1 shown in FIGS. 1 to 3 is used by being attached to a mouth M (see FIG. 3) of a container such as a PET bottle, for example, and compression molding or injection molding.
  • a container such as a PET bottle, for example, and compression molding or injection molding.
  • the raw material which forms the cap 1 is not specifically limited, Polypropylene etc. other than the polyethylene used by this embodiment are used suitably.
  • the cap 1 has a substantially circular top wall 2 in a plan view, and a substantially cylindrical skirt wall 3 extending downward from the outer peripheral portion of the top wall 2. Yes.
  • a knurled 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 coupled to a male screw M1 (see FIG. 3) formed on the outer periphery of the container mouth. Is possible.
  • the annular shape connected to the inner surface (lower surface) of the top wall 2 is provided.
  • the middle leg (inner ring) 6, the annular rib 7 and the annular outer leg (outer ring) 8 are in close contact with the container mouth M, whereby the container mouth is sealed (see FIG. 3). That is, as shown by the phantom line in FIG. 3, in the state where the cap 1 is attached to the container mouth portion M, the middle foot 6 is inserted into the container mouth portion M and is in close contact with the inner peripheral surface of the container mouth portion M.
  • the annular rib 7 is configured to be in close contact with the annular upper end surface of the container mouth portion M
  • the outer leg 8 is configured to be in close contact with the outer peripheral surface of the container mouth portion M.
  • the cap 1 is a pilfer-proof cap having a function of proving that it has not been opened (that has never been opened).
  • the unopened cap 1 attached to the container mouth M is opened (first time)
  • the cap 1 is rotated so that the coupling between the male screw M1 and the female screw 5 is released, the cap 1 is detached from the container mouth M, but the tamper evidence connected to the lower part of the skirt wall 3
  • a band (hereinafter simply referred to as “band”) 9 is configured to remain in the container mouth M.
  • the band 9 is connected to the lower part of the skirt wall 3 via an annular weakened portion 10 extending over the entire circumference of the skirt wall 3 (see FIG. 3).
  • the annular weakened portion 10 is connected to the skirt wall 3 and the band 9.
  • a part (outer peripheral part) of the bridge 10a is also cut by the slit 10b so that it is broken when pulled by a predetermined force.
  • each locking piece 11 protruding inward is provided on the inner peripheral side of the band 9 (eight in this example) at intervals in the circumferential direction (see FIGS. 1 to 3).
  • Each locking piece 11 is positioned substantially below an annular protrusion (bead portion) M2 formed below the male screw M1 on the outer periphery of the container mouth M in a state where the cap 1 is mounted on the container mouth M. Then, it is locked to the annular protrusion M2 by an opening operation (see FIG. 3).
  • the locking piece 11 is configured to be able to be locked to the annular protrusion M2 from below, and the cap main body portion (the skirt wall 3 and the top wall 2) above the annular weakening portion 10 when opened is the container mouth portion.
  • the band 9 which is separated from M and 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 piece 11 provided on the band 9 protrudes downward as shown in FIG.
  • the cap 1 is attached to the container mouth M, the cap 1 is pushed up by the annular projection M2 to be inverted, and protrudes upward as indicated by a virtual line in FIG.
  • the outer leg 8 has extended 1.35 mm or more below the lower surface 2a located in the outer peripheral side of the outer leg 8 in the top wall 2.
  • the length L of the outer leg 8 (projection length from the lower surface 2a of the top wall 2) L is set to 1.35 mm or longer, which is longer than a general one.
  • adhere with respect to the outer peripheral surface of the container mouth part M increases, and the improvement of a sealing performance can be aimed at.
  • the length L of the outer leg 8 can be 1.58 mm, 1.78 mm, or the like.
  • the outer diameter of the middle foot 6 is the largest at the outer diameter maximum portion 6 a formed between the proximal end and the distal end of the middle foot 6, and the outer foot 8 is outside the proximal end of the middle foot 6. It extends to a position corresponding to the maximum diameter portion 6a.
  • the inner peripheral surface of the outer foot 8 is expanded downward, the outer peripheral surface is decreased in diameter, and the outer periphery is reduced from the taper angle ⁇ of the inner peripheral surface.
  • the taper angle ⁇ of the surface is increased.
  • the taper angle ⁇ of the inner peripheral surface is 5 ° or more and the taper angle ⁇ of the outer peripheral surface is 20 ° or less.
  • the outer leg 8 Since the outer leg 8 is less than the taper angle ⁇ and hardly elastically deforms in the diameter-expanding direction, the adhesion force of the outer leg 8 to the container mouth M is increased, so that the sealing performance can be improved.
  • the latter effect is further increased by forming the lower surface 2b positioned on the inner peripheral side of the outer leg 8 on the top wall 2 above the lower surface 2a positioned on the outer peripheral side.
  • the taper angle ⁇ of the inner peripheral surface is 10 °
  • the taper angle ⁇ of the outer peripheral surface is 15 °
  • the taper angle ⁇ of the inner peripheral surface is 5 °
  • the taper angle ⁇ of the outer peripheral surface is 10 °.
  • the difference between the taper angles ⁇ and ⁇ is preferably 3 to 10 °, more preferably about 5 ° or about 5 ° (4 ° to 6 °).
  • the lower surface 2b positioned on the inner peripheral side of the outer leg 8 is formed above the lower surface 2a positioned on the outer peripheral side in the top wall 2, but not limited thereto, the lower surfaces 2a and 2b are Even if formed at the same height, the lower surface 2a may be formed above the lower surface 2b.
  • the middle foot 6 protrudes downward from the outer foot 8, and the container mouth M contacts the middle foot 6 before the outer foot 8 at the time of capping.
  • the thickness of the base end portion of the outer foot 8 (inside / outside width) is made larger than the thickness of the base end portion (inside / outside width) of the middle foot 6.
  • the length L of the outer leg 8 is 1.35 mm or more, but it may be shorter than this.
  • the resin cap according to the present invention can be used for containers that contain various drinks, liquids other than drinks, powders, and the like in addition to fruit juice drinks and carbonated drinks.
  • SYMBOLS 1 Cap 2 Top wall 2a The lower surface located in the outer peripheral side of an outer leg 2b The lower surface located in the inner peripheral side of an outer foot 3 Skirt wall 4 Knurled groove 5 Female screw 6 Middle foot 6a Outer diameter maximum part 7 Annular rib 8 Outer foot 9 Tamper Evidence band 10 Annular weakened portion 10a Bridge 10b Slit 11 Locking piece L Length of outer leg M Container mouth M1 Male screw M2 Annular projection ⁇ Tapered angle of outer peripheral surface of outer foot ⁇ Tapered angle of outer peripheral surface of outer foot

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

Abstract

Capuchon en plastique dans lequel l'aptitude au moulage est exceptionnelle, et il est par conséquent possible d'obtenir une étanchéité améliorée. La présente invention concerne un capuchon en plastique pourvu d'une paroi supérieure et d'une paroi de collerette qui s'étend vers le bas à partir de la périphérie extérieure de la paroi supérieure et comporte un filetage interne qui s'enfile avec une vis externe d'une ouverture de récipient, la surface inférieure de la paroi supérieure ayant, formées d'un seul tenant avec celle-ci, une patte centrale annulaire qui est étroitement reliée à la surface périphérique intérieure de l'ouverture de récipient et une patte extérieure annulaire qui est étroitement reliée à la surface périphérique extérieure de l'ouverture de récipient, la surface périphérique intérieure de la patte extérieure augmentant en diamètre vers le bas, la surface périphérique extérieure de la patte extérieure diminuant en diamètre vers le bas, et l'angle de conicité de la surface périphérique extérieure étant supérieur à l'angle de conicité de la surface périphérique intérieure.
PCT/JP2017/031441 2016-09-06 2017-08-31 Capuchon en plastique WO2018047711A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018538381A JP6932705B2 (ja) 2016-09-06 2017-08-31 樹脂製キャップ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016173268 2016-09-06
JP2016-173268 2016-09-06

Publications (1)

Publication Number Publication Date
WO2018047711A1 true WO2018047711A1 (fr) 2018-03-15

Family

ID=61561437

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/031441 WO2018047711A1 (fr) 2016-09-06 2017-08-31 Capuchon en plastique

Country Status (2)

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JP (1) JP6932705B2 (fr)
WO (1) WO2018047711A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020158168A (ja) * 2019-03-27 2020-10-01 キヤノン株式会社 液体収容ボトル
JP7434275B2 (ja) 2019-03-07 2024-02-20 日本山村硝子株式会社 合成樹脂製キャップ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322012A (en) * 1980-05-09 1982-03-30 Dairy Cap Corporation Threaded plastic bottle cap
DE4203238A1 (de) * 1992-02-05 1993-08-12 Mouldtec Pvg Ag Verschlusskappe aus kunststoff fuer insbesondere pet-flaschen
JP2010149886A (ja) * 2008-12-24 2010-07-08 Japan Crown Cork Co Ltd 合成樹脂製容器蓋

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905852A (en) * 1989-05-26 1990-03-06 Zapata Industries, Inc. Plastic closure with improved seal
JP2015077999A (ja) * 2013-10-17 2015-04-23 日本山村硝子株式会社 樹脂製キャップ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322012A (en) * 1980-05-09 1982-03-30 Dairy Cap Corporation Threaded plastic bottle cap
DE4203238A1 (de) * 1992-02-05 1993-08-12 Mouldtec Pvg Ag Verschlusskappe aus kunststoff fuer insbesondere pet-flaschen
JP2010149886A (ja) * 2008-12-24 2010-07-08 Japan Crown Cork Co Ltd 合成樹脂製容器蓋

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7434275B2 (ja) 2019-03-07 2024-02-20 日本山村硝子株式会社 合成樹脂製キャップ
JP2020158168A (ja) * 2019-03-27 2020-10-01 キヤノン株式会社 液体収容ボトル
JP7336227B2 (ja) 2019-03-27 2023-08-31 キヤノン株式会社 インク収容ボトル

Also Published As

Publication number Publication date
JP6932705B2 (ja) 2021-09-08
JPWO2018047711A1 (ja) 2019-06-24

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