JP7434275B2 - Synthetic resin cap - Google Patents
Synthetic resin cap Download PDFInfo
- Publication number
- JP7434275B2 JP7434275B2 JP2021504017A JP2021504017A JP7434275B2 JP 7434275 B2 JP7434275 B2 JP 7434275B2 JP 2021504017 A JP2021504017 A JP 2021504017A JP 2021504017 A JP2021504017 A JP 2021504017A JP 7434275 B2 JP7434275 B2 JP 7434275B2
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- JP
- Japan
- Prior art keywords
- metatarsal
- sectional shape
- root portion
- root
- synthetic resin
- Prior art date
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- 229920003002 synthetic resin Polymers 0.000 title claims description 24
- 239000000057 synthetic resin Substances 0.000 title claims description 24
- 210000001872 metatarsal bone Anatomy 0.000 claims description 28
- 210000000452 mid-foot Anatomy 0.000 claims description 24
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000002683 foot Anatomy 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- 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
- B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
-
- 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
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/22—Caps or cap-like covers with elastic parts adapted to be stretched over the container
- B65D41/225—Caps or cap-like covers with elastic parts adapted to be stretched over the container with integral internal sealing means
-
- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0202—Removable lids or covers without integral tamper element
- B65D43/0225—Removable lids or covers without integral tamper element secured by rotation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Description
本発明は、例えば、飲料物等の内容物を収容する容器の口部に装着される合成樹脂製キャップに関する。 TECHNICAL FIELD The present invention relates to a synthetic resin cap that is attached to the mouth of a container that accommodates contents such as drinks, for example.
従来の合成樹脂製キャップとして、図３（Ａ）及び（Ｂ）に示すように、天板部５１とその周縁から垂下した筒部５２とを備えたキャップの天板部５１に、容器口部Ｍ内に嵌入される環状の内側シール突起５３と、容器口部Ｍの開口端面に当接する環状の開口端シール突起５４と、容器口部Ｍの外面に当接する環状の外側シール突起５５とが形成され、内側シール突起５３は、わずかに内方に弾性的に湾曲した状態で容器口部Ｍの内面に当接するように構成されたものが知られている（特許文献１）。 As shown in FIGS. 3(A) and 3(B), a conventional synthetic resin cap includes a top plate part 51 and a cylindrical part 52 hanging from its periphery, and a container mouth part. An annular inner seal protrusion 53 that is fitted into the container M, an annular open end seal protrusion 54 that abuts the open end surface of the container mouth M, and an annular outer seal protrusion 55 that abuts the outer surface of the container mouth M. It is known that the inner seal protrusion 53 is configured to abut against the inner surface of the container mouth M in a slightly elastically curved state (Patent Document 1).
斯かる合成樹脂製キャップでは、内側シール突起５３は、十分な押圧力で容器口部Ｍの内面に当接する、とされている。 In such a synthetic resin cap, the inner seal protrusion 53 is said to abut against the inner surface of the container mouth M with sufficient pressing force.
しかし、上記従来の合成樹脂製キャップには、密封性の向上を図る余地があると考えられる。 However, it is thought that there is room for improvement in the sealing performance of the conventional synthetic resin cap.
本発明は上述の事柄に留意してなされたもので、その目的は、密封性の向上を図ることができる合成樹脂製キャップを提供することにある。 The present invention has been made with the above-mentioned considerations in mind, and an object thereof is to provide a synthetic resin cap that can improve sealing performance.
上記目的を達成するために、本発明に係る合成樹脂製キャップは、天壁と、この天壁の外周部から下方に向かって延び、容器口部の雄ねじに螺合する雌ねじを有するスカート壁とを備え、前記天壁の下面には、前記容器口部の内周面に密着する環状の中足を一体的に形成してある合成樹脂製キャップであって、前記中足の外周面は、その縦断面形状をみた場合に、根元側から先端側に向かって、外側根元部、外側上部、外側中央部、外側下部の四つの領域に分けることができ、前記外側根元部は、前記天壁の下面の位置から、前記中足の上方に向かって凹むように湾曲する縦断面形状を有し、前記外側上部は、前記外側根元部の下端から、一定の曲率半径を持つように、かつ、前記中足の内側に向かって凹むように湾曲する縦断面形状を有し、前記外側中央部は、前記外側上部の下端から、一定の曲率半径を持つように、かつ、前記中足の外側に向かって凸となるように湾曲する縦断面形状を有し、また、前記外側中央部の上下方向における中央部には、前記中足の外径が最大となるシールポイントが設けられていて、前記外側中央部は、その上端からシールポイントに向かって下側ほど外径が大きくなるように湾曲しているが、そのシールポイントから下側では逆に下側ほど外径が小さくなるように湾曲し、前記外側下部は、前記外側中央部の下端から、一定の傾斜角度を持つように、かつ、下側ほど外径が小さくなるように直線状に延びる縦断面形状を有し、前記中足の縦断面形状において、前記外側中央部の曲率半径は前記外側上部の曲率半径より小さく、かつ、前記外側上部の上下幅より前記外側根元部の上下幅は小さく、前記外側中央部の上下幅は前記外側根元部の上下幅より小さい（請求項１）。 In order to achieve the above object, the synthetic resin cap according to the present invention includes a top wall, a skirt wall that extends downward from the outer periphery of the top wall, and has a female thread that is screwed into the male thread of the container mouth. a synthetic resin cap having an annular mid-foot integrally formed on the lower surface of the top wall and in close contact with the inner peripheral surface of the container mouth, the outer peripheral surface of the mid-foot being: When looking at its longitudinal cross-sectional shape, it can be divided into four regions from the root side to the tip side: an outer root part, an outer upper part, an outer central part, and an outer lower part. has a vertical cross-sectional shape that is concavely curved upward from the lower surface of the metatarsal, and the outer upper part has a constant radius of curvature from the lower end of the outer root part, and It has a vertical cross-sectional shape that curves concavely toward the inside of the metatarsal, and the lateral central part has a constant radius of curvature from the lower end of the lateral upper part, and extends toward the lateral side of the metatarsal. It has a vertical cross-sectional shape that is curved to be convex toward the outside, and a seal point is provided at the center in the vertical direction of the outer center, and the outer diameter of the metatarsal is at its maximum. The outer central part is curved from the upper end toward the seal point so that the outer diameter becomes larger toward the bottom, but conversely, from the seal point toward the bottom, the outer diameter curves so that the outer diameter becomes smaller toward the bottom. , the outer lower part has a vertical cross-sectional shape that extends linearly from the lower end of the outer central part at a constant inclination angle, and the outer diameter becomes smaller toward the lower part, and In the vertical cross-sectional shape, the radius of curvature of the outer central portion is smaller than the radius of curvature of the outer upper portion, and the vertical width of the outer root portion is smaller than the vertical width of the outer upper portion, and the vertical width of the outer central portion is smaller than the vertical width of the outer upper portion. It is smaller than the vertical width of the outer root portion (Claim 1).
上記合成樹脂製キャップにおいて、前記中足の内周面は、その縦断面形状をみた場合に、根元側から先端側に向かって、内側根元部及び内側本体部の二つの領域に分けることができ、前記内側根元部は、前記天壁下面において前記中足の内側の位置から、一定の曲率半径を持つように、かつ、前記中足の上方に向かって凹むように湾曲する縦断面形状を有し、また、その上端から下方に向かって下側ほど内径が大きくなるように湾曲し、前記内側本体部は、前記内側根元部の下端から直線状に延びる縦断面形状を有し、前記外側根元部より前記内側根元部の方が緩やかに湾曲し、前記中足の内周側に連なる前記天壁の下面と外周側に連なる前記天壁の下面とが略同一高さとなっていて、前記内側根元部の上下幅より前記外側根元部の上下幅の方が大きく、かつ、前記外側根元部は内側根元部よりも下方にまで延びていてもよい（請求項２）。 In the synthetic resin cap, the inner circumferential surface of the metatarsal can be divided into two regions, an inner root portion and an inner main body portion, from the root side to the tip side when looking at the longitudinal cross-sectional shape. , the inner root portion has a longitudinal cross-sectional shape that curves from the inner side of the metatarsal on the lower surface of the ceiling wall so as to have a constant radius of curvature and to be concave toward the upper part of the metatarsal. The inner main body portion is curved downward from the upper end so that the inner diameter becomes larger toward the lower side, and the inner main body portion has a vertical cross-sectional shape extending linearly from the lower end of the inner root portion, and The inner root portion is curved more gently than the inner root portion, and the lower surface of the ceiling wall extending to the inner circumferential side of the metatarsal and the lower surface of the ceiling wall extending to the outer circumferential side are approximately at the same height, and The vertical width of the outer root portion may be larger than the vertical width of the root portion, and the outer root portion may extend below the inner root portion (Claim 2).
上記合成樹脂製キャップにおいて、前記中足の外周面の上部（前記シールポイントより上側）には上下方向に直線状に延びる部分を設けず、前記中足の内周面の上部には直線状に延びる部分である前記内側本体部を設け、前記中足の上部において内外で平行に延びる部分を設けないようにしてもよい（請求項３）。 In the synthetic resin cap, the upper part of the outer peripheral surface of the metatarsal (above the sealing point) is not provided with a linearly extending part in the vertical direction, and the upper part of the inner peripheral surface of the metatarsal is not provided with a linear part. The inner main body portion which is an extending portion may be provided, but there may be no portion extending in parallel between the inside and outside of the upper part of the midfoot (Claim 3).
上記合成樹脂製キャップにおいて、前記外側上部は、前記中足の外周面におけるシールポイントより上側において最も大きな領域を占めてもよい（請求項４）。 In the synthetic resin cap, the outer upper portion may occupy the largest area above a seal point on the outer peripheral surface of the metatarsal (Claim 4).
本願発明では、密封性の向上を図ることができる合成樹脂製キャップが得られる。 The present invention provides a synthetic resin cap that can improve sealing performance.
すなわち、本発明の合成樹脂製キャップでは、容器口部に対するキャッピング時に、容器口部先端の内縁に対してその上部外周面の形状に工夫を凝らした中足が密着し易く、それだけ密封性を高めることができる。 That is, in the synthetic resin cap of the present invention, when capping the container mouth, the middle leg, which has a specially designed upper outer peripheral surface shape, can easily come into close contact with the inner edge of the tip of the container mouth, which improves the sealing performance accordingly. be able to.
請求項２に係る発明の合成樹脂製キャップでは、中足の根元部の形状に工夫を凝らしたことにより、密封性が高まるという上記効果を高めることができる。 In the synthetic resin cap of the invention according to claim 2, the above-mentioned effect of improving the sealing performance can be enhanced by devising the shape of the base of the midfoot.
本発明の実施の形態について図面を参照しながら以下に説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図１（Ａ）及び図２に示す合成樹脂製キャップ（以下、キャップという）１は、例えばペットボトル等の容器の口部Ｍ（図２参照）に装着されて使用されるものであり、コンプレッション成形又はインジェクション成形によって、ポリエチレンで一体的に成形されている。なお、キャップ１を形成する素材は、特に限定されるものではなく、本実施形態で用いたポリエチレンの他、ポリプロピレン等が好適に用いられる。 A synthetic resin cap (hereinafter referred to as a cap) 1 shown in FIGS. 1(A) and 2 is used by being attached to the mouth M (see FIG. 2) of a container such as a plastic bottle, and is used for compression. It is integrally molded from polyethylene by molding or injection molding. Note that the material forming the cap 1 is not particularly limited, and in addition to the polyethylene used in this embodiment, polypropylene and the like are suitably used.
また、キャップ１は、平面視において略円形状の天壁２と、この天壁２の外周部から下向きに延びる略円筒状のスカート壁３とを有している。ここで、スカート壁３の外周面にはローレット溝４を、内周面には雌ねじ５を設けてあり、この雌ねじ５は容器口部の外周に形成された雄ねじＭ１（図２参照）に結合可能である。 The cap 1 also includes a top wall 2 that is approximately circular in plan view, and a skirt wall 3 that is approximately cylindrical and extends downward from the outer circumferential portion of the top wall 2 . Here, a knurled groove 4 is provided on the outer peripheral surface of the skirt wall 3, and a female thread 5 is provided on the inner peripheral surface, and this female thread 5 is connected to a male thread M1 (see FIG. 2) formed on the outer periphery of the container mouth. It is possible.
そして、容器口部Ｍの雄ねじＭ１にスカート壁３の雌ねじ５が結合するようにキャップ１を回転させて容器口部Ｍに装着すると、天壁２の内面（下面）に連設された環状の中足（インナーリング）６、環状リブ７及び環状の外足（アウターリング）８が容器口部Ｍに密着し、これにより、容器口部が密封された状態となる。すなわち、キャップ１が容器口部Ｍに装着された状態では、中足６は容器口部Ｍ内に差し込まれて容器口部Ｍの内周面に密着し、環状リブ７は容器口部Ｍの環状の上端面に密着し、外足８は容器口部Ｍの外周面に密着するように構成されている。 Then, when the cap 1 is rotated and attached to the container mouth M so that the female thread 5 of the skirt wall 3 is connected to the male thread M1 of the container mouth M, an annular ring connected to the inner surface (lower surface) of the top wall 2 is attached. The middle leg (inner ring) 6, the annular rib 7, and the annular outer leg (outer ring) 8 are brought into close contact with the container mouth M, thereby making the container mouth hermetically sealed. That is, when the cap 1 is attached to the container mouth M, the middle leg 6 is inserted into the container mouth M and comes into close contact with the inner peripheral surface of the container mouth M, and the annular rib 7 is attached to the container mouth M. The outer leg 8 is configured to be in close contact with the upper end surface of the annular shape, and the outer leg 8 is in close contact with the outer peripheral surface of the container mouth M.
また、キャップ１は、未開封（開栓が一度もされていないこと）を証明する機能を有するピルファープルーフキャップであり、容器口部Ｍに装着された未開封のキャップ１の開封時（最初の開栓時）に、雄ねじＭ１と雌ねじ５の結合が解除されるようにキャップ１を回転させると、キャップ１は容器口部Ｍから離脱するが、スカート壁３の下部に連結されたタンパーエビデンスバンド（以下、単に「バンド」という）９は容器口部Ｍに残留するように構成されている。 In addition, the cap 1 is a pilfer-proof cap that has the function of proving that it is unopened (that it has never been opened), and when the unopened cap 1 attached to the container opening M is opened (the first When opening the cap), when the cap 1 is rotated so that the connection between the male screw M1 and the female screw 5 is released, the cap 1 separates from the container opening M, but the tamper evidence connected to the lower part of the skirt wall 3 The band (hereinafter simply referred to as "band") 9 is configured to remain in the container mouth M.
すなわち、スカート壁３の下部には、スカート壁３の全周にわたって延びる環状弱化部１０を介してバンド９を連結してあり、環状弱化部１０は、スカート壁３とバンド９との境界の内周側に存在する複数のブリッジ１０ａと、スカート壁３とバンド９とを上下に画するようにスカート壁３及びバンド９の周方向に延びるスリット１０ｂとで構成され、ブリッジ１０ａが所定の力で引っ張られると破断するように、ブリッジ１０ａの一部（外周部分）もスリット１０ｂで切断されている。 That is, the band 9 is connected to the lower part of the skirt wall 3 via an annular weakened part 10 that extends over the entire circumference of the skirt wall 3. It is composed of a plurality of bridges 10a existing on the circumferential side and slits 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. A portion (outer peripheral portion) of the bridge 10a is also cut with a slit 10b so that it will break when pulled.
また、バンド９の内周側には、内向きに突出する係止片（フラップ）１１を、周方向に間隔をおいて複数（本例では８個）設けてある。各係止片１１は、キャップ１が容器口部Ｍに装着された状態で、容器口部Ｍの外周において雄ねじＭ１よりも下方に形成された環状突起（ビード部）Ｍ２（図２参照）の略下側へ位置し、開栓操作によって環状突起Ｍ２に係止する。すなわち、係止片１１は、環状突起Ｍ２に下方から係止可能に構成され、開封の際に、環状弱化部１０より上方にあるキャップ本体部（スカート壁３及び天壁２）は容器口部Ｍから離脱し、環状弱化部１０より下方にあるバンド９は容器口部Ｍに残留し、これに伴って環状弱化部１０は破断する。 Further, on the inner peripheral side of the band 9, a plurality of (eight in this example) locking pieces (flaps) 11 that project inward are provided at intervals in the circumferential direction. Each locking piece 11 is attached to an annular projection (bead portion) M2 (see FIG. 2) formed on the outer periphery of the container mouth M below the male thread M1 when the cap 1 is attached to the container mouth M. It is located substantially downward and is locked to the annular protrusion M2 when the cap is opened. That is, the locking piece 11 is configured to be able to lock onto the annular protrusion M2 from below, and when the cap is opened, the cap main body (skirt wall 3 and top wall 2) located above the annular weakened portion 10 is connected to the container opening. The band 9 that is separated from M and is located below the annular weakened part 10 remains in the container mouth M, and the annular weakened part 10 is broken accordingly.
ここで、バンド９はキャップ本体部（スカート壁３及び天壁２）と一体成形され、バンド９に設けられる係止片１１は、キャップ１の成形時には下向きに突出しているが、容器口部Ｍへのキャップ１の装着の際に、環状突起Ｍ２に押し上げられて反転し、図１（Ａ）、図２に示すように上向きに突出する状態となる。 Here, the band 9 is integrally molded with the cap main body (skirt wall 3 and top wall 2), and the locking piece 11 provided on the band 9 protrudes downward when the cap 1 is molded, but it When the cap 1 is attached to the cap 1, it is pushed up by the annular projection M2 and reversed, so that it protrudes upward as shown in FIGS. 1(A) and 2.
そして、本実施形態では、図１（Ｂ）に示すように、中足６の外周面は、その縦断面形状をみた場合に、根元側から先端側に向かって、外側根元部１２、外側上部１３、外側中央部１４、外側下部１５の四つの領域に分けることができる。 In this embodiment, as shown in FIG. 1(B), when looking at the longitudinal cross-sectional shape, the outer circumferential surface of the metatarsal foot 6 has an outer root portion 12, an outer upper portion, and a 13, an outer central portion 14, and an outer lower portion 15.
外側根元部１２は、天壁２下面において環状リブ７の内側の位置から、一定の曲率半径を持つように、かつ、中足６の上方に向かって凹むように湾曲する縦断面形状を有している。また、外側根元部１２は、その上端から下方に向かって下側ほど外径が小さくなるように湾曲しているが、その下部では逆に下側ほど外径が大きくなるように湾曲している。 The outer root portion 12 has a vertical cross-sectional shape that curves from the inner side of the annular rib 7 on the lower surface of the top wall 2 so as to have a constant radius of curvature and to be concave toward the upper part of the midfoot 6. ing. Further, the outer root portion 12 is curved downward from its upper end so that the outer diameter becomes smaller toward the bottom, but conversely, the outer root portion 12 is curved so that the outer diameter becomes larger toward the bottom. .
外側上部１３は、外側根元部１２の下端から、一定の曲率半径を持つように、かつ、中足６の内側に向かって凹むように湾曲する縦断面形状を有している。 The outer upper part 13 has a vertical cross-sectional shape that curves from the lower end of the outer root part 12 to have a constant radius of curvature and to be concave toward the inside of the midfoot 6.
外側中央部１４は、外側上部１３の下端から、一定の曲率半径を持つように、かつ、中足６の外側に向かって凸となる（突出する）ように湾曲する縦断面形状を有している。また、外側中央部１４の上下方向における中央部には、中足６の外径が最大となるシールポイント１４ａが設けられていて、外側中央部１４は、その上端からシールポイント１４ａに向かって下側ほど外径が大きくなるように湾曲しているが、そのシールポイント１４ａから下側では逆に下側ほど外径が小さくなるように湾曲している。 The outer central part 14 has a vertical cross-sectional shape that curves from the lower end of the outer upper part 13 to have a constant radius of curvature and to become convex (protrude) toward the outside of the midfoot 6. There is. Further, a seal point 14a where the outer diameter of the middle foot 6 is the maximum is provided at the center in the vertical direction of the outer central portion 14, and the outer central portion 14 is lowered from the upper end toward the seal point 14a. Although it is curved so that the outer diameter becomes larger toward the side, it is curved so that the outer diameter becomes smaller toward the bottom from the seal point 14a.
外側下部１５は、外側中央部１４の下端から、一定の傾斜角度を持つように、かつ、下側ほど外径が小さくなるように直線状に延びる縦断面形状を有している。 The outer lower part 15 has a vertical cross-sectional shape extending linearly from the lower end of the outer central part 14 at a constant inclination angle and with an outer diameter decreasing toward the lower side.
また、本実施形態では、図１（Ｂ）に示すように、中足６の内周面は、その縦断面形状をみた場合に、根元側から先端側に向かって、内側根元部１６及び内側本体部１７の二つの領域に分けることができる。 Further, in this embodiment, as shown in FIG. 1(B), the inner peripheral surface of the metatarsal foot 6 has an inner root portion 16 and an inner peripheral surface from the root side toward the distal end side when looking at the longitudinal cross-sectional shape. The main body portion 17 can be divided into two regions.
内側根元部１６は、天壁２下面において中足６の内側の位置から、一定の曲率半径を持つように、かつ、中足６の上方に向かって凹むように湾曲する縦断面形状を有している。また、内側根元部１６は、その上端から下方に向かって下側ほど内径が大きくなるように湾曲している。 The inner root portion 16 has a vertical cross-sectional shape that curves from the inner side of the midfoot 6 on the lower surface of the top wall 2 so as to have a constant radius of curvature and to be concave toward the upper part of the midfoot 6. ing. Further, the inner root portion 16 is curved downward from the upper end so that the inner diameter becomes larger toward the lower side.
内側本体部１７は、内側根元部１６の下端から、一定の傾斜角度（本例では１°）を持つように、かつ、下側ほど内径が大きくなるように直線状に延びる縦断面形状を有している。 The inner main body portion 17 has a vertical cross-sectional shape that extends linearly from the lower end of the inner root portion 16 at a constant inclination angle (1° in this example) and such that the inner diameter increases toward the bottom. are doing.
ここで、中足６の縦断面形状において、外側根元部１２の曲率半径より内側根元部１６の曲率半径の方が大きく（外側根元部１２より内側根元部１６の方が緩やかに湾曲している）、この内側根元部１６の曲率半径より外側中央部１４の曲率半径の方が大きく、この外側中央部１４の曲率半径より外側上部１３の曲率半径の方が大きい。また、中足６において、内側根元部１６の上下幅より外側根元部１２の上下幅の方が大きく、かつ、外側根元部１２は内側根元部１６よりも下方にまで延びており、この外側根元部１２の上下幅より外側上部１３の上下幅の方が大きい一方、外側中央部１４の上下幅は外側根元部１２の上下幅さらには内側根元部１６の上下幅より小さい。 Here, in the longitudinal cross-sectional shape of the midfoot 6, the radius of curvature of the inner root part 16 is larger than the radius of curvature of the outer root part 12 (the inner root part 16 is more gently curved than the outer root part 12). ), the radius of curvature of the outer central portion 14 is larger than the radius of curvature of the inner root portion 16, and the radius of curvature of the outer upper portion 13 is larger than the radius of curvature of the outer central portion 14. Further, in the midfoot 6, the vertical width of the lateral root portion 12 is larger than the vertical width of the medial root portion 16, and the lateral root portion 12 extends further downward than the medial root portion 16. The vertical width of the outer upper portion 13 is larger than the vertical width of the portion 12, while the vertical width of the outer central portion 14 is smaller than the vertical width of the outer root portion 12 and further the vertical width of the inner root portion 16.
上記のように構成された中足６では、その外周面におけるシールポイント１４ａより上側において最も大きな領域を占める外側上部１３の縦断面形状が、中足６の内側に向かって凹む湾曲状をしているので、容器口部Ｍに対するキャップ１の装着時（キャッピング時）に、容器口部Ｍ先端の内縁に対して外側上部１３が密着し易く、それだけ密封性を高めることができる。そして、この効果は、中足６の外周面の上部（シールポイント１４ａより上側）には上下方向に直線状に延びる部分を設けず、内周面の上部には直線状に延びる部分（内側本体部１７）を設け、つまりは中足６の上部において内外で平行に延びる部分を設けないようにしたことにより、一層高まることになる。 In the midfoot 6 configured as described above, the longitudinal cross-sectional shape of the outer upper part 13, which occupies the largest area above the seal point 14a on the outer peripheral surface, is curved toward the inside of the midfoot 6. Therefore, when the cap 1 is attached to the container mouth M (at the time of capping), the outer upper part 13 easily comes into close contact with the inner edge of the tip of the container mouth M, and the sealing performance can be improved accordingly. This effect is obtained by not providing a portion extending linearly in the vertical direction on the upper part of the outer circumferential surface of the midfoot 6 (above the seal point 14a), and providing a linearly extending portion on the upper part of the inner circumferential surface (inner body 17), that is, the upper part of the midfoot 6 is not provided with a portion that extends in parallel inside and out, thereby further increasing the height.
また、中足６の外側根元部１２及び内側根元部１６の縦断面形状が、それぞれ中足６の上方に向かって凹む湾曲状をしていて、外側根元部１２より内側根元部１６の方が緩やかに湾曲しているので、これによっても密封性が高まるという上記効果は高まることになる。 Further, the longitudinal cross-sectional shapes of the outer root portion 12 and the inner root portion 16 of the metatarsal foot 6 are respectively curved upwardly, and the inner root portion 16 is smaller than the outer root portion 12. Since it is gently curved, the above-mentioned effect of improving sealing performance is also enhanced by this.
ここで、外側根元部１２の縦断面形状の曲率半径を、容器口部Ｍの先端の内縁の縦断面形状の曲率半径より小さくするなど、中足６の外側根元部１２の縦断面形状が、容器口部Ｍの先端の内縁の縦断面形状より急峻に湾曲するようにすることによっても、密封性が高まるという上記効果は高まることになる。 Here, by making the radius of curvature of the longitudinal cross-sectional shape of the outer root portion 12 smaller than the radius of curvature of the longitudinal cross-sectional shape of the inner edge of the tip of the container mouth M, the longitudinal cross-sectional shape of the outer root portion 12 of the midfoot 6 is The above-mentioned effect of improving sealing performance is also enhanced by curving more steeply than the vertical cross-sectional shape of the inner edge of the tip of the container mouth M.
また、環状リブ７の下端から中足６のシールポイント１４ａまでの軸方向の距離ｄ１が、１．５ｍｍ以上３．５ｍｍ以下とするのが好ましい。１．５ｍｍ未満であるとシールポイント１４ａが容器口部Ｍの先端に近すぎ、逆に、３．５ｍｍ超であると中足６のシールポイント１４ａから上側の部分が撓み易くなり、いずれの場合も気密漏れし易くなる。 Further, it is preferable that the distance d1 in the axial direction from the lower end of the annular rib 7 to the seal point 14a of the midfoot 6 is 1.5 mm or more and 3.5 mm or less. If it is less than 1.5 mm, the seal point 14a is too close to the tip of the container mouth M, and conversely, if it is more than 3.5 mm, the upper part of the midfoot 6 from the seal point 14a will easily bend. It also makes it easier for the airtight to leak.
また、中足６において、外側下部１５はキャッピング時に容器口部Ｍの当接を受ける部分であり、基本的に、その上下方向の中央位置１５ａは容器口部Ｍが当接することが想定される箇所である。そして、本実施形態では、中足６においてシールポイント１４ａから中央位置１５ａまでの軸方向の距離ｄ２が、中央位置１５ａから中足６の下端までの軸方向の距離ｄ３よりも大きくなるようにしてあり、これにより、中足６の小型化による使用材料量の低減を図りつつ、中足６の下部をある程度厚くして折れ難いようにしてある。しかも、本実施形態では、中央位置１５ａを中足６の最小外径位置より外側（外周側）に位置させ、かつ、外側根元部１２よりも外周側に出ない範囲としたので、キャッピング時に中足６はその根元から下方に向かって広範囲にわたって変形し易くなり、応力が集中せず、それだけ大きな抵抗を受け難いものとすることができる。 In addition, in the middle leg 6, the outer lower part 15 is a part that receives contact with the container mouth M during capping, and it is basically assumed that the container mouth M comes into contact with the vertically central position 15a. It is a place. In the present embodiment, the axial distance d2 from the seal point 14a to the center position 15a in the midfoot 6 is made larger than the axial distance d3 from the center position 15a to the lower end of the midfoot 6. As a result, while reducing the amount of material used by downsizing the middle leg 6, the lower part of the middle leg 6 is thickened to a certain extent to make it difficult to break. Moreover, in this embodiment, the center position 15a is located outside (outer circumferential side) than the minimum outer diameter position of the midfoot 6, and within a range that does not extend beyond the outer root portion 12, so that the center position 15a The leg 6 is easily deformed over a wide range downward from its base, stress is not concentrated, and the leg 6 can be made less susceptible to large resistance.
なお、本発明は、上記の実施の形態に何ら限定されず、本発明の要旨を逸脱しない範囲において種々に変形して実施し得ることは勿論である。例えば、以下のような変形例を挙げることができる。 It should be noted that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention. For example, the following modifications can be given.
上記実施の形態では、内側本体部１７は、内側根元部１６の下端から、一定の傾斜角度（１°）を持つように、かつ、下側ほど内径が大きくなるように直線状に延びる縦断面形状を有しており、これにより型抜きを行い易くしてあるが、これに限らず、例えば、内側本体部１７がキャップ１の軸方向と平行に延びていてもよい。 In the embodiment described above, the inner main body portion 17 has a vertical cross section extending linearly from the lower end of the inner root portion 16 at a constant inclination angle (1°) and with the inner diameter increasing toward the bottom. The shape of the cap 1 is such that it is easy to perform die cutting, but the present invention is not limited to this, and the inner main body portion 17 may extend parallel to the axial direction of the cap 1, for example.
図１（Ａ）、図２の例では、フラップ（バンド９の下側部分を内側に折り返した構造のもの）１１を設けてあるが、このフラップ１１のかわりにフック（バンド９の内周側に突出する部分を設けた構造のもの）を設けて容器口部Ｍの環状突起Ｍ２に係合させるようにしてもよい。 In the examples shown in FIGS. 1A and 2, a flap 11 (a structure in which the lower part of the band 9 is folded back inward) is provided, but instead of this flap 11, a hook (on the inner circumferential side of the band 9) is provided. It is also possible to provide an annular protrusion M2 of the container mouth M by providing a protruding portion thereon.
図１（Ａ）、図２の例では、中足６の内周側に連なる天壁２の下面と外周側に連なる天壁２の下面とが略同一高さとなっているが、これに限らず、前者が後者より上方に位置していても下方に位置していてもよい。 In the examples of FIGS. 1(A) and 2, the lower surface of the top wall 2 that extends to the inner circumference of the midfoot 6 and the lower surface of the ceiling wall 2 that extends to the outer circumference of the midfoot 6 are approximately at the same height, but this is not limited to this. First, the former may be located above or below the latter.
なお、上記変形例どうしを適宜組み合わせてもよいことはいうまでもない。 It goes without saying that the above modifications may be combined as appropriate.
１ キャップ
２ 天壁
３ スカート壁
４ ローレット溝
５ 雌ねじ
６ 中足
７ 環状リブ
８ 外足
９ タンパーエビデンスバンド
１０ 環状弱化部
１１ 係止片
１２ 外側根元部
１３ 外側上部
１４ 外側中央部
１４ａ シールポイント
１５ 外側下部
１６ 内側根元部
１７ 内側本体部
５１ 天板部
５２ 筒部
５３ 内側シール突起
５４ 開口端シール突起
５５ 外側シール突起
ｄ１ 軸方向の距離
ｄ２ 軸方向の距離
ｄ３ 軸方向の距離
Ｍ 容器口部
Ｍ１ 雄ねじ
Ｍ２ 環状突起（被係合部）
1 Cap 2 Top wall 3 Skirt wall 4 Knurled groove 5 Female thread 6 Middle leg 7 Annular rib 8 Outer leg 9 Tamper evidence band 10 Annular weakened part 11 Locking piece 12 Outer root part 13 Outer upper part 14 Outer center part 14a Seal point 15 Outer side Lower part 16 Inner root part 17 Inner body part 51 Top plate part 52 Cylinder part 53 Inner seal protrusion 54 Open end seal protrusion 55 Outer seal protrusion d1 Axial distance d2 Axial distance d3 Axial distance M Container mouth M1 Male thread M2 Annular projection (engaged part)
Claims (4)
前記中足の外周面は、その縦断面形状をみた場合に、根元側から先端側に向かって、外側根元部、外側上部、外側中央部、外側下部の四つの領域に分けることができ、
前記外側根元部は、前記天壁の下面の位置から、前記中足の上方に向かって凹むように湾曲する縦断面形状を有し、
前記外側上部は、前記外側根元部の下端から、一定の曲率半径を持つように、かつ、前記中足の内側に向かって凹むように湾曲する縦断面形状を有し、
前記外側中央部は、前記外側上部の下端から、一定の曲率半径を持つように、かつ、前記中足の外側に向かって凸となるように湾曲する縦断面形状を有し、また、前記外側中央部の上下方向における中央部には、前記中足の外径が最大となるシールポイントが設けられていて、前記外側中央部は、その上端からシールポイントに向かって下側ほど外径が大きくなるように湾曲しているが、そのシールポイントから下側では逆に下側ほど外径が小さくなるように湾曲し、
前記外側下部は、前記外側中央部の下端から、一定の傾斜角度を持つように、かつ、下側ほど外径が小さくなるように直線状に延びる縦断面形状を有し、
前記中足の縦断面形状において、前記外側中央部の曲率半径は前記外側上部の曲率半径より小さく、かつ、前記外側上部の上下幅より前記外側根元部の上下幅は小さく、前記外側中央部の上下幅は前記外側根元部の上下幅より小さい合成樹脂製キャップ。 a top wall; a skirt wall extending downward from the outer periphery of the top wall and having a female thread that is screwed into the male thread of the container mouth; A synthetic resin cap integrally formed with an annular metatarsal that adheres to the surface,
The outer circumferential surface of the metatarsal foot can be divided into four regions from the root side to the tip side, ie, the outer root part, the outer upper part, the outer central part, and the outer lower part, when looking at its longitudinal cross-sectional shape,
The outer root portion has a vertical cross-sectional shape that curves concavely from the lower surface of the ceiling wall toward the upper part of the metatarsal foot,
The outer upper part has a longitudinal cross-sectional shape that curves from the lower end of the outer root part to have a constant radius of curvature and to be concave toward the inner side of the metatarsal,
The outer central part has a longitudinal cross-sectional shape that curves from the lower end of the outer upper part to have a constant radius of curvature and to be convex toward the outer side of the metatarsal, and A seal point is provided at the center in the vertical direction of the central portion, and the outer diameter of the outer central portion increases from the upper end toward the seal point downwardly. However, below the sealing point, it curves so that the outer diameter becomes smaller as it goes lower.
The outer lower part has a vertical cross-sectional shape that extends linearly from the lower end of the outer central part at a constant inclination angle and such that the outer diameter becomes smaller toward the bottom;
In the vertical cross-sectional shape of the metatarsal foot, the radius of curvature of the outer central portion is smaller than the radius of curvature of the outer upper portion, and the vertical width of the outer root portion is smaller than the vertical width of the outer upper portion. A synthetic resin cap whose vertical width is smaller than the vertical width of the outer base portion.
前記内側根元部は、前記天壁下面において前記中足の内側の位置から、一定の曲率半径を持つように、かつ、前記中足の上方に向かって凹むように湾曲する縦断面形状を有し、また、その上端から下方に向かって下側ほど内径が大きくなるように湾曲し、
前記内側本体部は、前記内側根元部の下端から直線状に延びる縦断面形状を有し、
前記外側根元部より前記内側根元部の方が緩やかに湾曲し、
前記中足の内周側に連なる前記天壁の下面と外周側に連なる前記天壁の下面とが略同一高さとなっていて、前記内側根元部の上下幅より前記外側根元部の上下幅の方が大きく、かつ、前記外側根元部は内側根元部よりも下方にまで延びている請求項１に記載の合成樹脂製キャップ。 The inner circumferential surface of the metatarsal can be divided into two regions, an inner root portion and an inner main body portion, from the root side to the tip side when looking at its longitudinal cross-sectional shape,
The inner root portion has a vertical cross-sectional shape that curves from a position inside the metatarsal on the lower surface of the ceiling wall so as to have a constant radius of curvature and to be concave toward the upper part of the metatarsal. , and is curved downward from its upper end so that the inner diameter becomes larger toward the bottom.
The inner main body portion has a vertical cross-sectional shape extending linearly from the lower end of the inner root portion,
The inner root portion is more gently curved than the outer root portion,
The lower surface of the ceiling wall extending to the inner circumferential side of the metatarsal foot and the lower surface of the ceiling wall extending to the outer circumferential side of the metatarsal foot are approximately at the same height, and the vertical width of the outer root portion is larger than the vertical width of the inner root portion. 2. The synthetic resin cap according to claim 1, wherein the outer root portion is larger than the inner root portion.
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| PCT/JP2020/007988 WO2020179607A1 (en) | 2019-03-07 | 2020-02-27 | Synthetic resin cap |
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| JP2009262969A (en) | 2008-04-25 | 2009-11-12 | Csi Japan:Kk | Synthetic resin cap, sealing device, and sealing device containing beverage |
| JP2013107677A (en) | 2011-11-21 | 2013-06-06 | Csi Japan:Kk | Synthetic resin cap for carbonated beverage-filled container, closure device, and beverage-filled closure device |
| JP2013203419A (en) | 2012-03-28 | 2013-10-07 | Nihon Yamamura Glass Co Ltd | Synthetic resin cap |
| US20140263335A1 (en) | 2013-03-14 | 2014-09-18 | Silgan White Cap LLC | Internal, multi-seal plastic closure |
| WO2018047711A1 (en) | 2016-09-06 | 2018-03-15 | 日本山村硝子株式会社 | Plastic cap |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4428776A1 (en) | 1994-08-13 | 1996-02-15 | Philips Patentverwaltung | Circuit arrangement for controlling a display arrangement consisting of several display units |
| ES2247811T3 (en) * | 1998-03-03 | 2006-03-01 | Frank Schellenbach | CONTAINER WITH A PLASTIC CLOSURE COVER WITH SEPARABLE WARRANTY TAPE AND INTERIOR OBTURATION. |
| WO2015193971A1 (en) * | 2014-06-17 | 2015-12-23 | サントリーホールディングス株式会社 | Resin cap |
-
2020
- 2020-02-27 WO PCT/JP2020/007988 patent/WO2020179607A1/en active Application Filing
- 2020-02-27 CN CN202080013708.4A patent/CN113423648B/en active Active
- 2020-02-27 KR KR1020217029538A patent/KR20210129117A/en not_active Application Discontinuation
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009084292A1 (en) | 2007-12-28 | 2009-07-09 | Nihon Yamamura Glass Co., Ltd. | Synthetic resin cap |
| JP2009262969A (en) | 2008-04-25 | 2009-11-12 | Csi Japan:Kk | Synthetic resin cap, sealing device, and sealing device containing beverage |
| JP2013107677A (en) | 2011-11-21 | 2013-06-06 | Csi Japan:Kk | Synthetic resin cap for carbonated beverage-filled container, closure device, and beverage-filled closure device |
| JP2013203419A (en) | 2012-03-28 | 2013-10-07 | Nihon Yamamura Glass Co Ltd | Synthetic resin cap |
| US20140263335A1 (en) | 2013-03-14 | 2014-09-18 | Silgan White Cap LLC | Internal, multi-seal plastic closure |
| WO2018047711A1 (en) | 2016-09-06 | 2018-03-15 | 日本山村硝子株式会社 | Plastic cap |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113423648B (en) | 2022-12-30 |
| WO2020179607A1 (en) | 2020-09-10 |
| JPWO2020179607A1 (en) | 2020-09-10 |
| KR20210129117A (en) | 2021-10-27 |
| CN113423648A (en) | 2021-09-21 |
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