JP2021031164A - Container lid - Google Patents
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- JP2021031164A JP2021031164A JP2019156934A JP2019156934A JP2021031164A JP 2021031164 A JP2021031164 A JP 2021031164A JP 2019156934 A JP2019156934 A JP 2019156934A JP 2019156934 A JP2019156934 A JP 2019156934A JP 2021031164 A JP2021031164 A JP 2021031164A
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 79
- 229920003002 synthetic resin Polymers 0.000 claims description 22
- 239000000057 synthetic resin Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 description 10
- 238000001746 injection moulding Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005406 washing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- -1 polypropylene Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 241000217377 Amblema plicata Species 0.000 description 1
- 239000004278 EU approved seasoning Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000011194 food seasoning agent Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Closures For Containers (AREA)
Abstract
Description
本発明は、蓋本体とこの蓋本体に旋回自在に接続された上蓋とを具備する、合成樹脂から一体に成形された容器蓋に関する。 The present invention relates to a container lid integrally molded from a synthetic resin, comprising a lid body and an upper lid swivelably connected to the lid body.
下記特許文献１及び２に開示されている如く、液体調味料及び飲料等のための容器の口頸部に適用される容器蓋として、蓋本体と、蓋本体を覆う閉位置と蓋本体を露呈させる開位置との間を旋回自在に接続される上蓋とを具備する、射出成形によって合成樹脂から一体に成形された容器蓋が広く実用に供されている。蓋本体は閉塞壁及び該閉塞壁の周縁から垂下する筒状側壁を含み、閉塞壁には無端薄肉破断可能ラインが形成されており、閉塞壁の上面には薄肉破断可能ラインよりも半径方向外側において上方に隆起する筒状シール壁が付設されている。上蓋は天面壁及び天面壁の周縁から垂下するスカート壁を含み、スカート壁の内周面には、蓋本体の該シール壁の外周面に係止する環状シール突条が形成されている。 As disclosed in Patent Documents 1 and 2 below, as a container lid applied to the mouth and neck of a container for liquid seasonings, beverages, etc., the lid body, the closed position covering the lid body, and the lid body are exposed. A container lid integrally molded from a synthetic resin by injection molding, which is provided with an upper lid that is rotatably connected to an open position to be formed, is widely put into practical use. The lid body includes a closed wall and a tubular side wall hanging from the peripheral edge of the closed wall, the closed wall is formed with an endless thin-walled fractureable line, and the upper surface of the closed wall is radially outside the thin-walled fractureable line. A tubular seal wall that rises upward is attached. The upper lid includes a top wall and a skirt wall hanging from the peripheral edge of the top wall, and an annular seal ridge that locks to the outer peripheral surface of the seal wall of the lid body is formed on the inner peripheral surface of the skirt wall.
而して、本発明者等の経験によれば、上述したとおりの形態の容器蓋においては、蓋本体におけるシール壁の外周面に微小な窪みが生成される傾向があり、かかる窪みが生成されると、上蓋を閉位置にせしめた状態においてシール壁の外周面と上蓋に形成されているシール突条との係止によるシール効果が不充分になってしまって、例えば容器の口頸部に容器蓋を装着した後に容器蓋に洗浄水を噴射した時に容器蓋内に洗浄水が浸入してしまうという問題が発生する虞がある。 Therefore, according to the experience of the present inventors, in the container lid of the form as described above, a minute dent tends to be formed on the outer peripheral surface of the seal wall in the lid body, and such a dent is generated. Then, in the state where the upper lid is closed, the sealing effect due to the locking between the outer peripheral surface of the sealing wall and the sealing ridge formed on the upper lid becomes insufficient, for example, on the mouth and neck of the container. When the washing water is sprayed onto the container lid after the container lid is attached, there is a possibility that the washing water may infiltrate into the container lid.
本発明は上記事実に鑑みてなされたものであり、その主たる技術的課題は、蓋本体におけるシール壁の外周面に微小な窪みが生成されることが可及的に回避される、新規且つ改良された容器蓋を提供することである。 The present invention has been made in view of the above facts, and the main technical problem thereof is a novel and improved method in which the formation of minute dents on the outer peripheral surface of the sealing wall in the lid body is avoided as much as possible. It is to provide a container lid that has been made.
本発明者等は、蓋本体におけるシール壁の外周面に微小な窪みが生成される現象について検討を加えた結果、容器蓋を射出成形する際に、閉塞壁の中央部から流入される溶融状態の合成樹脂が閉塞壁に配設されている無端薄肉破断可能ラインを通って流動する瞬間に空気を巻き込み、巻き込んだ空気が開放されることなくシール壁まで溶融状態の合成樹脂によって流動せしめられることに起因して、シール壁の外周面に微小な窪みが生成されてしまうことを認識した。そして、更に検討を重ねた結果、無端薄肉破断可能ラインを通って流動する溶融状態の合成樹脂が直接的に且つ円滑にシール壁まで流動することを阻止する、換言すれば無端薄肉破断可能ラインを通過した溶融状態の合成樹脂の流動に適宜に干渉し、溶融状態の合成樹脂から巻き込んだ空気を開放することによって、シール壁の外周面に微小な窪みが生成されるのを可及的に回避することができることを認識した。 As a result of investigating the phenomenon that minute dents are formed on the outer peripheral surface of the seal wall in the lid body, the present inventors have studied a molten state inflow from the central portion of the closed wall when the container lid is injection-molded. At the moment when the synthetic resin of No. 1 flows through the endless thin-walled breakable line arranged on the closed wall, air is entrained, and the entrained air is allowed to flow to the seal wall by the molten synthetic resin without being released. It was recognized that a minute dent was generated on the outer peripheral surface of the seal wall due to the above. As a result of further studies, a molten synthetic resin that flows through the endless thin-walled breakable line is prevented from flowing directly and smoothly to the seal wall, in other words, an endless thin-walled breakable line. By appropriately interfering with the flow of the passed synthetic resin in the molten state and releasing the air entrained from the synthetic resin in the molten state, it is possible to avoid the formation of minute dents on the outer peripheral surface of the seal wall as much as possible. Recognized that it can be done.
上記のとおりの認識を踏まえ、本発明者等は、蓋本体の閉塞壁の下面及び／又は上面には、薄肉破断可能ラインよりも半径方向外側で且つシール壁よりも半径方向内側に位置する下面側環状凹部及び／又は上面側環状凹部が形成されており、下面側環状凹部の上端及び／又は上面側環状凹部の下端は薄肉破断可能ラインよりも上方及び／又は下方に位置している形態に容器蓋を改良すれば、成形型における下面側環状凹部及び／又は上面側環状凹部を規定する部片によって、無端薄肉破断可能ラインを通過した溶融状態の合成樹脂の流動が干渉され、溶融状態の合成樹脂から巻き込んだ空気が開放され、かくして上記主たる技術的課題が達成されることを見出した。 Based on the above recognition, the present inventors have described that the lower surface and / or the upper surface of the closed wall of the lid body is a lower surface located radially outside the thin-walled fractureable line and radially inside the seal wall. A side annular recess and / or an upper surface annular recess is formed, and the upper end of the lower surface annular recess and / or the lower end of the upper surface annular recess are located above and / or below the thin-walled fractureable line. If the container lid is improved, the flow of the synthetic resin in the molten state that has passed through the endless thin-walled fractureable line is interfered with by the portion defining the lower surface side annular recess and / or the upper surface side annular recess in the molding die, and the molten state is in the molten state. It has been found that the air entrained from the synthetic resin is released, thus achieving the above-mentioned main technical problems.
即ち、本発明の第一の局面によれば、上記主たる技術的課題を達成する容器蓋として、蓋本体と、該蓋本体を覆う閉位置と該蓋本体を露呈させる開位置との間を旋回自在に該蓋本体に接続された上蓋とを具備する合成樹脂から一体に成形された容器蓋であって、
該蓋本体は閉塞壁及び該閉塞壁の周縁から垂下する筒状側壁を含み、該閉塞壁には無端薄肉破断可能ラインが形成されており、該閉塞壁の上面には該薄肉破断可能ラインよりも半径方向外側において上方に隆起する筒状シール壁が付設されており、
該上蓋は天面壁及び該天面壁の周縁から垂下するスカート壁を含み、該スカート壁の内周面には、該蓋本体の該シール壁の外周面に係止する環状シール突条が形成されている容器蓋において、
該蓋本体の該閉塞壁の下面には、該薄肉破断可能ラインよりも半径方向外側で且つ該シール壁よりも半径方向内側に位置する下面側環状凹部が形成されており、該下面側環状凹部の上端は該薄肉破断可能ラインよりも上方に位置している、
ことを特徴とする容器蓋が提供される。
That is, according to the first aspect of the present invention, as a container lid that achieves the above-mentioned main technical problem, the lid body is swiveled between a closed position that covers the lid body and an open position that exposes the lid body. A container lid integrally molded from a synthetic resin having an upper lid freely connected to the lid body.
The lid body includes a closed wall and a tubular side wall hanging from the peripheral edge of the closed wall, an endless thin-walled breakable line is formed on the closed wall, and the thin-walled breakable line is formed on the upper surface of the closed wall. Also has a tubular seal wall that rises upward on the outer side in the radial direction.
The upper lid includes a top wall and a skirt wall hanging from the peripheral edge of the top wall, and an annular seal ridge that locks to the outer peripheral surface of the seal wall of the lid body is formed on the inner peripheral surface of the skirt wall. In the container lid
On the lower surface of the closed wall of the lid body, a lower surface side annular recess is formed which is located radially outside the thin-walled breakable line and radially inside the seal wall, and the lower surface side annular recess is formed. Is located above the thin-walled breakable line,
A container lid characterized by this is provided.
好ましくは、該蓋本体の該閉塞壁の上面には、該下面側環状凹部よりも半径方向外側で且つ該シール壁よりも半径方向内側に位置する上面側環状凹部が形成されている。この場合には、該上面側環状凹部の下端は該下面側環状凹部の上端と同高であるのがよい。 Preferably, the upper surface of the closed wall of the lid body is formed with an upper surface-side annular recess located radially outside the lower surface-side annular recess and radially inside the seal wall. In this case, the lower end of the upper surface side annular recess may be at the same height as the upper end of the lower surface side annular recess.
本発明の第二の局面によれば、上記主たる技術的課題を達成する容器蓋として、蓋本体と、該蓋本体を覆う閉位置と該蓋本体を露呈させる開位置との間を旋回自在に該蓋本体に接続された上蓋とを具備する合成樹脂から一体に成形された容器蓋であって、
該蓋本体は閉塞壁及び該閉塞壁の周縁から垂下する筒状側壁を含み、該閉塞壁には無端薄肉破断可能ラインが形成されており、該閉塞壁の上面には該薄肉破断可能ラインよりも半径方向外側において上方に隆起する筒状シール壁が付設されており、
該上蓋は天面壁及び該天面壁の周縁から垂下するスカート壁を含み、該スカート壁の内周面には、該蓋本体の該シール壁の外周面に係止する環状シール突条が形成されている容器蓋において、
該蓋本体の該閉塞壁の上面には、該薄肉破断可能ラインよりも半径方向外側で且つ該シール壁よりも半径方向内側に位置する上面側環状凹部が形成されており、該上面側環状凹部の下端は該薄肉破断可能ラインよりも下方に位置している、
ことを特徴とする容器蓋が提供される。
According to the second aspect of the present invention, as a container lid that achieves the above-mentioned main technical problem, the lid body can be swiveled between a closed position that covers the lid body and an open position that exposes the lid body. A container lid integrally molded from a synthetic resin provided with an upper lid connected to the lid body.
The lid body includes a closed wall and a tubular side wall hanging from the peripheral edge of the closed wall, an endless thin-walled breakable line is formed on the closed wall, and the thin-walled breakable line is formed on the upper surface of the closed wall. Also has a tubular seal wall that rises upward on the outer side in the radial direction.
The upper lid includes a top wall and a skirt wall hanging from the peripheral edge of the top wall, and an annular seal ridge that locks to the outer peripheral surface of the seal wall of the lid body is formed on the inner peripheral surface of the skirt wall. In the container lid
An upper surface-side annular recess is formed on the upper surface of the closed wall of the lid body, which is located radially outside the thin-walled breakable line and radially inside the seal wall. The lower end of is located below the thin-walled breakable line,
A container lid characterized by this is provided.
好ましくは、該蓋本体の該閉塞壁の下面には、該上面側環状凹部よりも半径方向外側で且つ該シール壁よりも半径方向内側に位置する下面側環状凹部が形成されている。この場合には、該下面側環状凹部の上端は該上面側環状凹部の下端と同高であるのがよい。 Preferably, the lower surface of the closed wall of the lid body is formed with an annular recess on the lower surface side located radially outside the annular recess on the upper surface side and radially inside the sealing wall. In this case, the upper end of the lower surface side annular recess may be at the same height as the lower end of the upper surface side annular recess.
本発明の容器蓋においては、蓋本体の閉塞壁の下面及び／又は上面には、薄肉破断可能ラインよりも半径方向外側で且つシール壁よりも半径方向内側に位置する下面側環状凹部及び／又は上面側環状凹部が形成されており、下面側環状凹部の上端及び／又は上面側環状凹部の下端は薄肉破断可能ラインよりも上方及び／又は下方に位置している。そのため、成形型における下面側環状凹部及び／又は上面側環状凹部を規定する部片によって、無端薄肉破断可能ラインを通過した溶融状態の合成樹脂の流動は干渉され、溶融状態の合成樹脂がシール壁の先端に到達するよりも先に、溶融状態の合成樹脂が巻き込んだ空気が開放されることとなる。これにより、シール壁の外周面に微小な窪みが生成されることが可及的に回避され、上蓋を閉位置にせしめた状態においてシール壁の外周面と上蓋に形成されたシール突条との係止によって充分なシール効果が得られる。 In the container lid of the present invention, the lower surface and / or the upper surface of the closed wall of the lid body has an annular recess on the lower surface side located radially outside the thin-walled breakable line and radially inside the seal wall and / or. The upper surface side annular recess is formed, and the upper end of the lower surface side annular recess and / or the lower end of the upper surface side annular recess is located above and / or below the thin-walled breakable line. Therefore, the flow of the molten synthetic resin that has passed through the endless thin-walled fractureable line is interfered with by the portion that defines the lower surface side annular recess and / or the upper surface side annular recess in the molding die, and the molten synthetic resin is a seal wall. The air entrained in the molten synthetic resin is released before reaching the tip of the. As a result, it is possible to avoid the formation of minute dents on the outer peripheral surface of the seal wall, and the outer peripheral surface of the seal wall and the seal ridges formed on the upper lid are formed in a state where the upper lid is closed. A sufficient sealing effect can be obtained by locking.
以下、本発明に従って構成された容器蓋の好適実施形態を図示している添付図面を参照して、更に詳細に説明する。 Hereinafter, the description will be made in more detail with reference to the accompanying drawings illustrating preferred embodiments of the container lid configured according to the present invention.
図１乃至図３を参照して説明すると、本発明に従って構成された、全体を番号２で示す容器蓋はポリプロピレン又はポリエチレンの如き適宜の合成樹脂から全体を一体に射出成形することによって形成される。かかる容器蓋２は蓋本体４及び上蓋６を含んでいる。上蓋６はヒンジ手段７を介して蓋本体４に接続されており、上蓋６は蓋本体４の上面を覆う閉位置（図１及び図５において二点鎖線で示す状態）と蓋本体４の上面を露呈させる開位置（図１及び図５において実線で示す状態）との間を旋回自在である。 Explaining with reference to FIGS. 1 to 3, the container lid, which is entirely indicated by No. 2, and which is configured according to the present invention, is formed by integrally injection molding the whole from an appropriate synthetic resin such as polypropylene or polyethylene. .. The container lid 2 includes a lid main body 4 and an upper lid 6. The upper lid 6 is connected to the lid main body 4 via a hinge means 7, and the upper lid 6 has a closed position covering the upper surface of the lid main body 4 (state indicated by a two-dot chain line in FIGS. 1 and 5) and the upper surface of the lid main body 4. Can be swiveled between the open position (the state shown by the solid line in FIGS. 1 and 5).
蓋本体４は、閉塞壁８及び閉塞壁８の周縁から垂下する筒状側壁１０を含んでいる。閉塞壁８は平面視において円形であって実質上水平に延在する。閉塞壁８の略中央領域には無端薄肉破断可能ライン１２が形成されており、閉塞壁８は薄肉破断可能ライン１２の内側の内側領域１４と、薄肉破断可能ライン１２の外側の環状外側領域１６とに区画される。図示の実施形態においては、薄肉破断可能ライン１２は円形であって、その中央位置（つまり内側領域１４の中央位置）は閉塞壁８の中央位置に対してヒンジ手段７とは直径方向反対側（図１乃至図３において左側）に幾分偏心している。内側領域１４には中栓１８が規定されている。中栓１８については後述する。外側領域１６の上面には、上方に延びる円筒形状注出筒２０が形成されている。注出筒２０は外側領域１６の内周縁（つまり薄肉破断可能ライン１２）に沿って形成されている。注出筒２０の内周面の下端部には径方向内側に突出する突条２２が周方向に間隔をおいて３個設けられている。注出筒２０の上端部は径方向外方にカールせしめられている。更に、注出筒２０は、ヒンジ手段７側の軸方向高さが反対側の軸方向高さよりも低く設定されており、上蓋６を開位置から閉位置に旋回せしめた際に、注出筒２０が上蓋６に形成された後述する係止壁と干渉することを回避している。閉塞壁８の上面には薄肉破断可能ライン１２よりも径方向外側において上方に隆起する筒状シール壁２４も付設されている。シール壁２４は閉塞壁８の外周縁部に設けられている。シール壁２４の上端位置は注出筒２０の上端位置よりも低く、シール壁２４の上端部には径方向外方に突出する環状突条２６が形成されている。外側領域１６の下面には、下方に延びる円筒形状シール片２８が形成されている。シール片２８は、径方向に見てシール壁２４と注出筒２０との間に設けられている。 The lid body 4 includes a closed wall 8 and a tubular side wall 10 hanging from the peripheral edge of the closed wall 8. The obstruction wall 8 is circular in a plan view and extends substantially horizontally. An endless thin-walled breakable line 12 is formed in a substantially central region of the closed wall 8, and the closed wall 8 has an inner region 14 inside the thin-walled breakable line 12 and an annular outer region 16 outside the thin-walled breakable line 12. It is divided into. In the illustrated embodiment, the thin-walled breakable line 12 is circular, and its central position (that is, the central position of the inner region 14) is diametrically opposite to the hinge means 7 with respect to the central position of the obstruction wall 8 (that is, the central position of the inner region 14). It is somewhat eccentric to the left side in FIGS. 1 to 3). An inner plug 18 is defined in the inner region 14. The inner plug 18 will be described later. A cylindrical pouring cylinder 20 extending upward is formed on the upper surface of the outer region 16. The dispensing cylinder 20 is formed along the inner peripheral edge of the outer region 16 (that is, the thin-walled breakable line 12). At the lower end of the inner peripheral surface of the dispensing cylinder 20, three ridges 22 protruding inward in the radial direction are provided at intervals in the circumferential direction. The upper end of the dispensing cylinder 20 is curled outward in the radial direction. Further, the pouring cylinder 20 is set so that the axial height on the hinge means 7 side is lower than the axial height on the opposite side, and when the upper lid 6 is swiveled from the open position to the closed position, the pouring cylinder 20 is set. It is avoided that the 20 interferes with the locking wall formed on the upper lid 6 which will be described later. A tubular seal wall 24 that rises upward in the radial direction from the thin-walled breakable line 12 is also attached to the upper surface of the closed wall 8. The seal wall 24 is provided on the outer peripheral edge of the closed wall 8. The upper end position of the seal wall 24 is lower than the upper end position of the pouring cylinder 20, and an annular ridge 26 protruding outward in the radial direction is formed at the upper end of the seal wall 24. A cylindrical seal piece 28 extending downward is formed on the lower surface of the outer region 16. The seal piece 28 is provided between the seal wall 24 and the pouring cylinder 20 when viewed in the radial direction.
本発明の容器蓋にあっては、蓋本体４の閉塞壁８の下面には、薄肉破断可能ライン１２よりも半径方向外側で且つシール壁２４よりも半径方向内側に位置する下面側環状凹部３０が形成されており、下面側環状凹部３０の上端は薄肉破断可能ライン１２よりも上方に位置していることが重要である。図示の実施形態においては、下面側環状凹部３０はシール片２８よりも径方向内側に位置している。下面側環状凹部３０の断面形状は上下方向に長い矩形である。図示の実施形態においては更に、蓋本体４の閉塞壁８の上面には、下面側環状凹部３０よりも半径方向外側で且つシール壁２４よりも半径方向内側に位置する上面側環状凹部３２も形成されている。図１及び図２を参照することによって理解されるとおり、上面側環状凹部３２の中心はシール片２８の中心と整合し、上面側環状凹部３２の外径はシール片２８の径と略同等であるが、上述したとおり、薄肉破断可能ライン１２の中央位置が閉塞壁８の中央位置に対してヒンジ手段７とは直径方向反対側（図１及び図２において左側）に幾分偏心していることに起因して、上面側環状凹部３２の底面は、直径方向に見てヒンジ手段７が形成されている側がヒンジ手段７が形成されていない側に比べて（図１及び図２においては左側が右側に比べて）幅広となっている。上面側環状凹部３２の断面の径方向内側面は上下方向に実質上鉛直に延びているが、径方向外側面は上方に向かって径方向外側に傾斜して延びている。上面側環状凹部３２の下端は下面側環状凹部３０の上端と同高である。 In the container lid of the present invention, the lower surface side annular recess 30 located on the lower surface of the closing wall 8 of the lid body 4 is located radially outside the thin-walled breakable line 12 and radially inside the seal wall 24. Is formed, and it is important that the upper end of the lower surface side annular recess 30 is located above the thin-walled breakable line 12. In the illustrated embodiment, the lower surface side annular recess 30 is located radially inside the seal piece 28. The cross-sectional shape of the lower surface side annular recess 30 is a rectangle that is long in the vertical direction. In the illustrated embodiment, the upper surface of the closed wall 8 of the lid body 4 is further formed with an upper surface side annular recess 32 located radially outside the lower surface side annular recess 30 and radially inside the seal wall 24. Has been done. As understood by referring to FIGS. 1 and 2, the center of the upper surface side annular recess 32 is aligned with the center of the seal piece 28, and the outer diameter of the upper surface side annular recess 32 is substantially the same as the diameter of the seal piece 28. However, as described above, the central position of the thin-walled breakable line 12 is slightly eccentric to the central position of the closing wall 8 on the side opposite to the hinge means 7 in the radial direction (left side in FIGS. 1 and 2). As a result, the bottom surface of the upper surface side annular recess 32 has a side on which the hinge means 7 is formed when viewed in the radial direction, as compared with a side on which the hinge means 7 is not formed (in FIGS. 1 and 2, the left side is on the left side). It is wider (compared to the right side). The radial inner surface of the cross section of the upper surface side annular recess 32 extends substantially vertically in the vertical direction, but the radial outer surface extends radially outward in the upward direction. The lower end of the upper surface side annular recess 32 is at the same height as the upper end of the lower surface side annular recess 30.
図１乃至図３を参照して説明を続けると、中栓１８は、破断可能薄肉ライン１２から下方に垂下する被係止壁３４と、被係止壁３４の下端を閉塞する底壁３６とを含んでいる。被係止壁３４は、上端から下方に向かって実質上鉛直に垂下した後、径方向内側に幾分傾斜しており、破断可能薄肉ライン１２は被係止壁３４の外周面の上端部に接続されている。被係止壁３４の外周面の下端部には径方向外方に幾分膨出する環状膨出部３８が形成されている。被係止壁３４の内周面の上端部には径方向内方に突出する環状被係止突条４０が形成されている。底壁３６は円形であって実質上水平に延在する。底壁３６の中央には番号４２によって示される下方に幾分突出した部位が形成されている。かかる部位４２は、射出成形によって容器蓋２を成形した際の、成形型内への溶融状態の合成樹脂の入口（所謂ゲート）である。これについては後に言及する。底壁３６の径方向中間部には上方に延びる円筒形状の案内壁４４が形成されている。上下方向に見ると、案内壁４４の上端は、被係止壁３４の上端を超えて幾分上方に位置している。案内壁４４の外周面の上端部は径方向外方に幾分膨出している。 Continuing the description with reference to FIGS. 1 to 3, the inner plug 18 includes a locked wall 34 that hangs downward from the breakable thin-walled line 12 and a bottom wall 36 that closes the lower end of the locked wall 34. Includes. The locked wall 34 hangs substantially vertically from the upper end and then is slightly inclined inward in the radial direction, and the breakable thin-walled line 12 is located at the upper end of the outer peripheral surface of the locked wall 34. It is connected. An annular bulging portion 38 that bulges slightly outward in the radial direction is formed at the lower end portion of the outer peripheral surface of the locked wall 34. An annular locked ridge 40 projecting inward in the radial direction is formed at the upper end of the inner peripheral surface of the locked wall 34. The bottom wall 36 is circular and extends substantially horizontally. In the center of the bottom wall 36, a slightly protruding portion is formed, which is indicated by the number 42. Such a portion 42 is an inlet (so-called gate) of the synthetic resin in a molten state into the molding mold when the container lid 2 is molded by injection molding. This will be mentioned later. A cylindrical guide wall 44 extending upward is formed in the radial intermediate portion of the bottom wall 36. When viewed in the vertical direction, the upper end of the guide wall 44 is located slightly above the upper end of the locked wall 34. The upper end of the outer peripheral surface of the guide wall 44 slightly bulges outward in the radial direction.
側壁１０は全体的に円筒形状である。側壁１０の内周面の下部の内径は上部の内径よりも拡径せしめられており、内周面の下端部には、径方向内側に突出する嵌合突条４６が周方向に間隔をおいて複数形成されている。側壁１０の外周面の上端部にはヒンジ手段７の一端が接続されている。側壁１０の外周面の上端部における、ヒンジ手段７とは直径方向反対側には、外径が比較的大きく低減せしめられた第一の切欠き５０が円弧状に形成されている。第一の切欠き５０の下方には、外径が比較的小さく低減せしめられた第二の切欠き５２も円弧状に形成されている。 The side wall 10 has a cylindrical shape as a whole. The inner diameter of the lower part of the inner peripheral surface of the side wall 10 is larger than the inner diameter of the upper part, and the fitting ridges 46 protruding inward in the radial direction are spaced apart from each other in the circumferential direction at the lower end of the inner peripheral surface. And multiple are formed. One end of the hinge means 7 is connected to the upper end of the outer peripheral surface of the side wall 10. At the upper end of the outer peripheral surface of the side wall 10, on the side opposite to the hinge means 7 in the diametrical direction, a first notch 50 having a relatively large reduction in outer diameter is formed in an arc shape. Below the first notch 50, a second notch 52 having a relatively small outer diameter and reduced in diameter is also formed in an arc shape.
図１乃至図３を参照して説明を続けると、上蓋６は、円形天面壁５４と、天面壁５４の周縁から垂下するスカート壁５６とを備えている。ここで、上蓋６の上下方向は、上蓋６が閉位置にあるときを基準として、以下説明を続ける。 Continuing the description with reference to FIGS. 1 to 3, the upper lid 6 includes a circular top wall 54 and a skirt wall 56 hanging from the peripheral edge of the top wall 54. Here, the vertical direction of the upper lid 6 will be described below with reference to the case where the upper lid 6 is in the closed position.
天面壁５４の下面の所要位置には、下方に垂下する円筒形状の係止壁５８が設けられている。係止壁５８は、上蓋６が閉位置にある状態において、中栓１８の案内壁４４及び被係止壁３４の間に規定される環状空間部と対応するように配置される。つまり、係止壁５８の中心も天面壁５４の中心に対してヒンジ手段７とは直径方向反対側に幾分偏心している。係止壁５８の下端部の外周面には径方向外方に突出する係止突条６０が周方向に等角度間隔をおいて８個形成されている。係止壁５８の基端部の外周面には、断面矩形のリブ６２が周方向に等角度間隔をおいて８個形成されている。夫々のリブ６２は周方向に隣接する２つの係止突条６０の間に設けられており、いずれのリブ６２も天面壁５４の下面に固着されている。天面壁５４の下面には、リブ６２を囲繞する２条の円環溝から構成される既知の液だれ防止手段６４が設けられている。 A cylindrical locking wall 58 that hangs downward is provided at a required position on the lower surface of the top wall 54. The locking wall 58 is arranged so as to correspond to an annular space defined between the guide wall 44 and the locked wall 34 of the inner plug 18 in a state where the upper lid 6 is in the closed position. That is, the center of the locking wall 58 is also somewhat eccentric with respect to the center of the top wall 54 on the side opposite to the hinge means 7 in the radial direction. Eight locking ridges 60 projecting outward in the radial direction are formed on the outer peripheral surface of the lower end portion of the locking wall 58 at equal angular intervals in the circumferential direction. Eight ribs 62 having a rectangular cross section are formed on the outer peripheral surface of the base end portion of the locking wall 58 at equal angular intervals in the circumferential direction. Each rib 62 is provided between two locking ridges 60 adjacent in the circumferential direction, and both ribs 62 are fixed to the lower surface of the top wall 54. On the lower surface of the top wall 54, a known dripping prevention means 64 composed of two annular grooves surrounding the rib 62 is provided.
スカート壁５６は、天面壁５４の周縁から径方向外方に向かって下方に弧状に湾曲せしめられた後、実質上鉛直に下方に向かって延びている。スカート壁５６の外周面の下端部にはヒンジ手段７の他端が接続されている。スカート壁５６の内周面の上下方向中間部には既知の環状捨てアンダーカット６６が形成されている。捨てアンダーカットについては、例えば本願の出願人によって本願より先に出願されて公開された特開２００３−２３４８号公報を参照されたい。捨てアンダーカット６６の下方には、蓋本体４のシール壁２４の外周面に係止する環状シール突条６８が形成されている。スカート壁５６の外周面における、ヒンジ手段７とは直径方向反対側の下端部には、径方向外方に突出して使用者の指がかけられる鍔部７０が形成されている。スカート壁５６の下面における、ヒンジ手段７とは直径方向反対側には、下方に垂下する円弧形状の垂下片７２が形成されている。スカート壁５６の下面には、４個の突部７４が周方向に間隔をおいて形成されている。 The skirt wall 56 is curved downward in a radial direction from the peripheral edge of the top wall 54, and then extends substantially vertically downward. The other end of the hinge means 7 is connected to the lower end of the outer peripheral surface of the skirt wall 56. A known annular discard undercut 66 is formed in the vertical intermediate portion of the inner peripheral surface of the skirt wall 56. For the discarded undercut, refer to Japanese Patent Application Laid-Open No. 2003-2348, which was filed and published prior to the present application by the applicant of the present application, for example. Below the discard undercut 66, an annular seal ridge 68 that locks to the outer peripheral surface of the seal wall 24 of the lid body 4 is formed. On the outer peripheral surface of the skirt wall 56, a flange portion 70 is formed at the lower end portion on the side opposite to the hinge means 7 in the radial direction so as to project outward in the radial direction and on which the user's finger can be hung. On the lower surface of the skirt wall 56, on the side opposite to the hinge means 7 in the radial direction, an arc-shaped hanging piece 72 that hangs downward is formed. On the lower surface of the skirt wall 56, four protrusions 74 are formed at intervals in the circumferential direction.
次に、上述したように構成された容器蓋２の射出成形の一例を図１及び図４に基づいて説明する。容器蓋２は図１に示す状態で射出成形される。図４は容器蓋２を射出成形するための成形型７６の要部の断面を示している。同図においては、容易に理解できるよう、成形型７６によって成形される容器蓋２に薄墨を付して示している。成形型７６は、上型７８と、下型８０とを具備している。上型７８は、枠体８２と、外側コア８４と、中間コア８６と、内側コア８８とを具備しており、夫々上下方向に移動可能である。枠体８２は略円筒形状であって、容器蓋２の蓋本体４における、側壁１０の上端部の外周面及びシール壁２４の外周面を規定している。外側コア８４は略円筒形状であって、その端面は、容器蓋２の蓋本体４における閉塞壁８の上面の、シール壁２４と注出筒２０との間の領域（上面側環状凹部３２を含む）を規定している。外側コア８４の外周面下端部は、上面側環状凹部３２の外周面を規定している。外側コア８４の内周面下端部は、上面側環状凹部３２の内周面及び注出筒２０の外周面を規定している。中間コア８６は略円筒形状であって、その端面は、容器蓋２の蓋本体４における閉塞壁８の上面の、注出筒２０と案内壁４４との間の領域（薄肉破断可能ライン１２を含む）を規定している。内側コア８８は略円柱形状であって、その端面は、容器蓋２の蓋本体４における閉塞壁８の上面の、底壁３６を規定している。内側コア８８の外周面下端部は、案内壁４４の内周面を規定している。図示は省略するが、内側コア８８の中央には上下方向に延びる溶融樹脂供給通路が形成されており、溶融樹脂は内側コア８８の下端面の中央から成形型７６に供給される。下型８０は、枠体９０と、外側コア９２と、中間コア９４と、内側コア９６とを具備しており、夫々上下方向に移動可能である。枠体９０は略円筒形状であって、容器蓋２の蓋本体４における、側壁１０の上記上端部よりも下方の外周面を規定している。外側コア９２は略円筒形状であって、その端面は、容器蓋２の蓋本体４における側壁１０と、閉塞壁８の下面のシール片２８との間の領域を規定している。外側コア９２の外周面上端部は、側壁１０の内周面を規定している。外側コア９２の内周面上端部は、シール片２８の外周面を規定している。中間コア９４は略円筒形状であって、その端面は、容器蓋２の蓋本体４における閉塞壁８の下面の、シール片２８と被係止壁３４との間の領域（下面側環状凹部３２及び薄肉破断可能ライン１２を含む）を規定している。中間コア９４の外周面上端部は、シール片２８の内周面及び下面側環状凹部３０の外周面を規定している。中間コア９４の内周面上端部は、下面側環状凹部３０の内周面及び被係止壁３４の外周面を規定している。内側コア９６は略円柱形状であって、その端面は、容器蓋２の蓋本体４における閉塞壁８の下面の、底壁３６を規定している。 Next, an example of injection molding of the container lid 2 configured as described above will be described with reference to FIGS. 1 and 4. The container lid 2 is injection-molded in the state shown in FIG. FIG. 4 shows a cross section of a main part of the molding die 76 for injection molding the container lid 2. In the figure, the container lid 2 molded by the molding die 76 is shown in light ink for easy understanding. The molding die 76 includes an upper die 78 and a lower die 80. The upper die 78 includes a frame body 82, an outer core 84, an intermediate core 86, and an inner core 88, each of which can be moved in the vertical direction. The frame body 82 has a substantially cylindrical shape, and defines the outer peripheral surface of the upper end portion of the side wall 10 and the outer peripheral surface of the seal wall 24 in the lid main body 4 of the container lid 2. The outer core 84 has a substantially cylindrical shape, and its end surface is a region (upper surface side annular recess 32) between the seal wall 24 and the pouring cylinder 20 on the upper surface of the closing wall 8 in the lid body 4 of the container lid 2. Includes). The lower end of the outer peripheral surface of the outer core 84 defines the outer peripheral surface of the upper surface side annular recess 32. The lower end of the inner peripheral surface of the outer core 84 defines the inner peripheral surface of the upper surface side annular recess 32 and the outer peripheral surface of the dispensing cylinder 20. The intermediate core 86 has a substantially cylindrical shape, and its end surface is a region (thin-walled breakable line 12) between the pouring cylinder 20 and the guide wall 44 on the upper surface of the closing wall 8 in the lid body 4 of the container lid 2. Includes). The inner core 88 has a substantially cylindrical shape, and its end surface defines a bottom wall 36 on the upper surface of the closing wall 8 in the lid body 4 of the container lid 2. The lower end of the outer peripheral surface of the inner core 88 defines the inner peripheral surface of the guide wall 44. Although not shown, a molten resin supply passage extending in the vertical direction is formed in the center of the inner core 88, and the molten resin is supplied to the molding die 76 from the center of the lower end surface of the inner core 88. The lower mold 80 includes a frame body 90, an outer core 92, an intermediate core 94, and an inner core 96, each of which can be moved in the vertical direction. The frame body 90 has a substantially cylindrical shape, and defines an outer peripheral surface of the lid body 4 of the container lid 2 below the upper end portion of the side wall 10. The outer core 92 has a substantially cylindrical shape, and its end surface defines a region between the side wall 10 of the lid body 4 of the container lid 2 and the seal piece 28 on the lower surface of the closed wall 8. The upper end of the outer peripheral surface of the outer core 92 defines the inner peripheral surface of the side wall 10. The upper end of the inner peripheral surface of the outer core 92 defines the outer peripheral surface of the seal piece 28. The intermediate core 94 has a substantially cylindrical shape, and its end surface is a region (lower surface side annular recess 32) between the seal piece 28 and the locked wall 34 on the lower surface of the closing wall 8 in the lid body 4 of the container lid 2. And the thin-walled breakable line 12). The upper end of the outer peripheral surface of the intermediate core 94 defines the inner peripheral surface of the seal piece 28 and the outer peripheral surface of the lower surface side annular recess 30. The upper end of the inner peripheral surface of the intermediate core 94 defines the inner peripheral surface of the lower surface side annular recess 30 and the outer peripheral surface of the locked wall 34. The inner core 96 has a substantially cylindrical shape, and its end surface defines a bottom wall 36 of the lower surface of the closing wall 8 in the lid body 4 of the container lid 2.
本発明の容器蓋においては、蓋本体４の閉塞壁８の下面及び／又は上面には、薄肉破断可能ライン１２よりも半径方向外側で且つシール壁２４よりも半径方向内側に位置する下面側環状凹部３０及び／又は上面側環状凹部３２が形成されており、下面側環状凹部３０の上端及び／又は上面側環状凹部３２の下端は薄肉破断可能ライン１２よりも上方及び／又は下方に位置している。そのため、成形型７６における下面側環状凹部３０及び／又は上面側環状凹部３２を規定する部片によって、無端薄肉破断可能ライン１２を通過した溶融状態の合成樹脂の流動は干渉され、溶融状態の合成樹脂がシール壁２４の先端に到達するよりも先に、溶融状態の合成樹脂が巻き込んだ空気が開放されることとなる。これにより、シール壁２４の外周面に微小な窪みが生成されることが可及的に回避され、上蓋６を閉位置にせしめた状態においてシール壁２４の外周面と上蓋６に形成されたシール突条６８との係止によって充分なシール効果が得られる。 In the container lid of the present invention, the lower surface side and / or the upper surface of the closing wall 8 of the lid body 4 is an annular surface on the lower surface side located radially outside the thin-walled fractureable line 12 and radially inside the sealing wall 24. The recess 30 and / or the upper surface side annular recess 32 is formed, and the upper end of the lower surface side annular recess 30 and / or the lower end of the upper surface side annular recess 32 is located above and / or below the thin-walled breakable line 12. There is. Therefore, the flow of the synthetic resin in the molten state that has passed through the endless thin-walled fractureable line 12 is interfered with by the portion defining the lower surface side annular recess 30 and / or the upper surface side annular recess 32 in the molding die 76, and the molten state synthesis is performed. The air entrained by the synthetic resin in the molten state is released before the resin reaches the tip of the seal wall 24. As a result, it is possible to avoid the formation of minute dents on the outer peripheral surface of the seal wall 24, and the seal formed on the outer peripheral surface of the seal wall 24 and the upper lid 6 in a state where the upper lid 6 is closed. A sufficient sealing effect can be obtained by locking with the ridge 68.
上述したとおりにして成形された容器蓋２は、これが容器の口頸部に装着されるより前に、予め、閉塞壁８に一体的に形成された中栓１８を閉塞壁８から分離させておく。かかる操作は上蓋６が閉位置にある状態において行われる。これについて図１及び図５を比較参照して説明すると、図１に示す状態から中栓１８が図示しない適宜の押し上げ具によって上方に押し上げられることで薄肉破断可能ライン１２が破断し、中栓１８（内側領域１４）は閉塞壁８の外側領域１６から分離せしめられる。閉塞壁８から分離せしめられた中栓１８は、閉塞壁８の外側領域１６に対して上方に移動し、中栓１８の被係止突条４０が上蓋６の係止突条６０を弾性的に乗り越えてこれに係止せしめられると共に、中栓１８の膨出部３８が蓋本体６の突条２２を弾性的に乗り越えて注出筒２０の内周面に密着せしめられる。この際、突条２２は上蓋６内の内圧を開放するための通気路として作用し、案内筒４４は中栓１８が傾倒することを防止し、リブ６２は中栓１８が過剰に上昇してしまうのを防止する。これらについては、本願の出願人によって本願よりも先に出願された特願２０１９−５３６９の明細書の記載を参照されたい。 In the container lid 2 formed as described above, the inner plug 18 integrally formed with the closing wall 8 is separated from the closing wall 8 in advance before it is attached to the mouth and neck of the container. deep. Such an operation is performed in a state where the upper lid 6 is in the closed position. Explaining this with reference to FIGS. 1 and 5, the thin-walled breakable line 12 is broken by pushing the inner plug 18 upward by an appropriate push-up tool (not shown) from the state shown in FIG. 1, and the inner plug 18 is broken. (Inner region 14) is separated from the outer region 16 of the obstruction wall 8. The inner plug 18 separated from the closing wall 8 moves upward with respect to the outer region 16 of the closing wall 8, and the locked ridge 40 of the inner plug 18 elastically presses the locking ridge 60 of the upper lid 6. The bulging portion 38 of the inner plug 18 elastically overcomes the ridge 22 of the lid body 6 and is brought into close contact with the inner peripheral surface of the pouring cylinder 20. At this time, the ridge 22 acts as a ventilation path for releasing the internal pressure in the upper lid 6, the guide cylinder 44 prevents the inner plug 18 from tilting, and the rib 62 has the inner plug 18 excessively raised. Prevent it from being stolen. For these, refer to the description of Japanese Patent Application No. 2019-5369 filed prior to the present application by the applicant of the present application.
上述したとおりの容器蓋２は、図５において二点鎖線で示されるとおり、ガラス或いはポリエチレンテレフタレートの如き適宜の合成樹脂から形成することができる容器の口頸部９８に装着される。口頸部９８は上面が開口された略円筒形状であり、その外周面上端には環状被嵌合突条１００が形成されている。容器蓋２は、その蓋本体４のシール片２８を口頸部９８内に挿入し、その側壁１０を口頸部９８の外周に被嵌せしめることによって口頸部９８に装着される。シール片２８の外周面は口頸部９８の内周面に密接せしめられる。側壁１０の内周面に形成されている嵌合突条４６は、口頸部９８の被嵌合突条１００を弾性的に乗り越えて、これに係止せしめられ、容器の口頸部９８に容器蓋２が保持される。本発明の容器蓋にあっては、上述したとおり、シール壁２４の外周面に微小な窪みが生成されることが可及的に回避され、上蓋６を閉位置にせしめた状態においてシール壁２４の外周面と上蓋６に形成されたシール突条６８との係止によって充分なシール効果が得られる。それ故に、容器の口頸部９８に装着された容器蓋２に洗浄水を噴射した際に、容器蓋２に洗浄水が浸入してしまうことが防止される。 The container lid 2 as described above is attached to the mouth and neck 98 of the container, which can be formed from an appropriate synthetic resin such as glass or polyethylene terephthalate, as shown by the alternate long and short dash line in FIG. The mouth neck 98 has a substantially cylindrical shape with an open upper surface, and an annular fitting ridge 100 is formed at the upper end of the outer peripheral surface thereof. The container lid 2 is attached to the mouth and neck 98 by inserting the seal piece 28 of the lid body 4 into the mouth and neck 98 and fitting the side wall 10 on the outer periphery of the mouth and neck 98. The outer peripheral surface of the seal piece 28 is brought into close contact with the inner peripheral surface of the mouth neck 98. The fitting ridge 46 formed on the inner peripheral surface of the side wall 10 elastically overcomes the fitted ridge 100 of the mouth neck 98 and is locked to the fitting ridge 100, and is locked to the mouth neck 98 of the container. The container lid 2 is held. In the container lid of the present invention, as described above, it is possible to avoid the formation of minute dents on the outer peripheral surface of the seal wall 24, and the seal wall 24 is in a state where the upper lid 6 is closed. A sufficient sealing effect can be obtained by engaging the sealing ridge 68 formed on the upper lid 6 with the outer peripheral surface of the above. Therefore, when the washing water is sprayed on the container lid 2 attached to the mouth neck 98 of the container, it is prevented that the washing water infiltrates into the container lid 2.
容器の内容物を消費する際は、鍔部７０に指を掛けて、図５に二点鎖線で示す閉位置に位置する上蓋６を上方に強制することで、上蓋６のシール突条６８が、蓋本体４のシール壁２４に形成された環状突条２６を弾性的に乗り越える。上蓋６はヒンジ手段７を旋回中心として旋回開動せしめられ、注出筒２０を露呈せしめる。この際には、上蓋６の係止突条６０と中栓１８の被係止突条４０との係止によって、中栓１８も上蓋６と一体となって旋回開動せしめられ、かくして、閉塞壁８に排出開口が形成される。次いで、容器を適宜に傾斜せしめれば、容器内の内容物が上記排出開口を通過した後に注出筒２０に案内されて排出される。内容物を所定量排出した後、ヒンジ手段７を旋回中心として上蓋６を旋回閉動せしめると、上蓋６は、蓋本体４の閉塞壁８及びその上面に形成されている注出筒２０を覆う。この際も、中栓１８は上蓋６と一体となって旋回閉動せしめられる。このとき、上述したとおり注出筒２０は、ヒンジ手段７側の軸方向高さが反対側の軸方向高さよりも低く設定されていることに起因して、中栓１８が上蓋６と一体となって開位置から閉位置に旋回閉動せしめられる際に、中栓１８の被係止壁３４又は底壁３６が注出筒２０の上端部と干渉することが回避される。そして、上蓋６が閉位置に到達すると、中栓１８の膨出部３８が注出筒２０の内周面と密着して上記排出開口は解除自在に閉塞せしめる。 When consuming the contents of the container, a finger is placed on the collar 70 to force the upper lid 6 located at the closed position shown by the alternate long and short dash line in FIG. 5 upward, so that the seal protrusion 68 of the upper lid 6 is released. , Elasticly overcomes the annular ridge 26 formed on the seal wall 24 of the lid body 4. The upper lid 6 is swiveled and opened around the hinge means 7 as a swivel center to expose the pouring cylinder 20. At this time, by locking the locking ridge 60 of the upper lid 6 and the locked ridge 40 of the inner plug 18, the inner plug 18 is also swiveled and opened integrally with the upper lid 6, thus blocking the wall. A discharge opening is formed at 8. Then, if the container is appropriately tilted, the contents in the container are guided by the pouring cylinder 20 and discharged after passing through the discharge opening. After discharging a predetermined amount of the contents, when the upper lid 6 is swiveled and closed with the hinge means 7 as the swivel center, the upper lid 6 covers the closing wall 8 of the lid main body 4 and the pouring cylinder 20 formed on the upper surface thereof. .. Also at this time, the inner plug 18 is swiveled and closed together with the upper lid 6. At this time, as described above, in the dispensing cylinder 20, the inner plug 18 is integrated with the upper lid 6 because the axial height on the hinge means 7 side is set lower than the axial height on the opposite side. It is possible to prevent the locked wall 34 or the bottom wall 36 of the inner plug 18 from interfering with the upper end portion of the dispensing cylinder 20 when the inner plug 18 is swiveled and closed from the open position to the closed position. Then, when the upper lid 6 reaches the closed position, the bulging portion 38 of the inner plug 18 comes into close contact with the inner peripheral surface of the dispensing cylinder 20 and the discharge opening is leasably closed.
上述した実施形態にあっては、下面側環状凹部３０は上面側環状凹部３２よりも径方向内側に配置されていたが所望ならば、図６に示すように、下面側環状凹部３０は上面側環状凹部３２よりも径方向外側に配置することができる。このように下面側環状凹部３０及び上面側環状凹部３２を配置しても薄肉破断可能ライン１２を通過した溶融状態の合成樹脂の流動は干渉されるため、図１等に示す容器蓋と同一の作用効果が得られる。更に、下面側環状凹部３０及び上面側環状凹部３２は、薄肉破断可能ライン１２よりも半径方向外側で且つシール壁２４よりも半径方向内側に配置され、下面側環状凹部３０の上端が薄肉破断可能ライン１２よりも上方に、上面側環状凹部３２の下端が薄肉破断可能ライン１２よりも下方に夫々位置するのであれば、いずれか一方のみを配置し他方を省略してもよい。 In the above-described embodiment, the lower surface side annular recess 30 is arranged radially inside the upper surface side annular recess 32, but if desired, the lower surface side annular recess 30 is located on the upper surface side as shown in FIG. It can be arranged radially outside the annular recess 32. Even if the lower surface side annular recess 30 and the upper surface side annular recess 32 are arranged in this way, the flow of the molten synthetic resin that has passed through the thin-walled breakable line 12 is interfered with, so that it is the same as the container lid shown in FIG. Action effect can be obtained. Further, the lower surface side annular recess 30 and the upper surface side annular recess 32 are arranged radially outside the thin-walled fractureable line 12 and radially inside the seal wall 24, and the upper end of the lower surface side annular recess 30 can be thin-walled fractured. If the lower end of the upper surface side annular recess 32 is located above the line 12 and below the thin-walled fractureable line 12, only one of them may be arranged and the other may be omitted.
以上本発明の容器蓋について添付図面を参照して詳述したが、本発明は上述した実施形態に限定されるものではなく、本発明の範囲を逸脱することなく種々の変形が可能である。例えば、上述した実施形態においては、中栓１８は閉塞壁８の一部としてこれと一体的に成形され、容器蓋３が容器の口頸部９８に装着されるのに先立って閉塞壁８から分離されている形式であったが、これに替えて、例えば特開２００５−２８９３８９号公報に開示されているような、外蓋を最初に旋回開動せしめる際に蓋本体の閉塞壁の一部を分離して排出開口を形成する形式のものにも適用することができる。また、本発明の容器蓋は、上述した所謂プルリングレスタイプの容器蓋に限定されず、例えば特開２００３−２３４８号公報に記載されるような、従来から広く使用されているプルリングタイプの容器蓋に対しても適用することができる。また、薄肉破断可能ラインは円形ではなく、例えばヒンジ手段とは直径方向反対側に向かって広がる扇形状や、先端がヒンジ手段とは直径方向反対側を向くような矢印形状であってもよい。 Although the container lid of the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, in the embodiment described above, the inner plug 18 is integrally molded with the closing wall 8 as a part of the closing wall 8 and is formed from the closing wall 8 prior to the container lid 3 being attached to the mouth neck 98 of the container. Although it was a separated form, instead of this, a part of the closing wall of the lid body was partially opened when the outer lid was first swiveled and opened, as disclosed in Japanese Patent Application Laid-Open No. 2005-289389. It can also be applied to a type that separates to form a discharge opening. Further, the container lid of the present invention is not limited to the so-called pull ring type container lid described above, and is a pull ring type container lid that has been widely used conventionally as described in, for example, Japanese Patent Application Laid-Open No. 2003-2348. It can also be applied to. Further, the thin-walled breakable line is not circular, and may be, for example, a fan shape that spreads toward the side opposite to the hinge means in the diametrical direction, or an arrow shape whose tip points toward the opposite side in the diametrical direction from the hinge means.
２：容器蓋
４：蓋本体
６：上蓋
８：閉塞壁
１０：側壁
１２：薄肉破断可能ライン
２４：シール壁
３０：下面側環状凹部
３２：上面側環状凹部
５４：天面壁
５６：スカート壁
６８：シール突条
2: Container lid 4: Lid body 6: Top lid 8: Blocking wall 10: Side wall 12: Thin-walled breakable line 24: Seal wall 30: Bottom side annular recess 32: Top surface side annular recess 54: Top wall 56: Skirt wall 68: Seal ridge
Claims (6)
該蓋本体は閉塞壁及び該閉塞壁の周縁から垂下する筒状側壁を含み、該閉塞壁には無端薄肉破断可能ラインが形成されており、該閉塞壁の上面には該薄肉破断可能ラインよりも半径方向外側において上方に隆起する筒状シール壁が付設されており、
該上蓋は天面壁及び該天面壁の周縁から垂下するスカート壁を含み、該スカート壁の内周面には、該蓋本体の該シール壁の外周面に係止する環状シール突条が形成されている容器蓋において、
該蓋本体の該閉塞壁の下面には、該薄肉破断可能ラインよりも半径方向外側で且つ該シール壁よりも半径方向内側に位置する下面側環状凹部が形成されており、該下面側環状凹部の上端は該薄肉破断可能ラインよりも上方に位置している、
ことを特徴とする容器蓋。 A container lid integrally molded from a synthetic resin including a lid body and an upper lid connected to the lid body so as to be swivelable between a closed position covering the lid body and an open position exposing the lid body. There,
The lid body includes a closed wall and a tubular side wall hanging from the peripheral edge of the closed wall, an endless thin-walled breakable line is formed on the closed wall, and the thin-walled breakable line is formed on the upper surface of the closed wall. Also has a tubular seal wall that rises upward on the outer side in the radial direction.
The upper lid includes a top wall and a skirt wall hanging from the peripheral edge of the top wall, and an annular seal ridge that locks to the outer peripheral surface of the seal wall of the lid body is formed on the inner peripheral surface of the skirt wall. In the container lid
On the lower surface of the closed wall of the lid body, a lower surface side annular recess is formed which is located radially outside the thin-walled breakable line and radially inside the seal wall, and the lower surface side annular recess is formed. Is located above the thin-walled breakable line,
A container lid characterized by that.
該蓋本体は閉塞壁及び該閉塞壁の周縁から垂下する筒状側壁を含み、該閉塞壁には無端薄肉破断可能ラインが形成されており、該閉塞壁の上面には該薄肉破断可能ラインよりも半径方向外側において上方に隆起する筒状シール壁が付設されており、
該上蓋は天面壁及び該天面壁の周縁から垂下するスカート壁を含み、該スカート壁の内周面には、該蓋本体の該シール壁の外周面に係止する環状シール突条が形成されている容器蓋において、
該蓋本体の該閉塞壁の上面には、該薄肉破断可能ラインよりも半径方向外側で且つ該シール壁よりも半径方向内側に位置する上面側環状凹部が形成されており、該上面側環状凹部の下端は該薄肉破断可能ラインよりも下方に位置している、
ことを特徴とする容器蓋。 A container lid integrally molded from a synthetic resin including a lid body and an upper lid connected to the lid body so as to be swivelable between a closed position covering the lid body and an open position exposing the lid body. There,
The lid body includes a closed wall and a tubular side wall hanging from the peripheral edge of the closed wall, an endless thin-walled breakable line is formed on the closed wall, and the thin-walled breakable line is formed on the upper surface of the closed wall. Also has a tubular seal wall that rises upward on the outer side in the radial direction.
The upper lid includes a top wall and a skirt wall hanging from the peripheral edge of the top wall, and an annular seal ridge that locks to the outer peripheral surface of the seal wall of the lid body is formed on the inner peripheral surface of the skirt wall. In the container lid
An upper surface-side annular recess is formed on the upper surface of the closed wall of the lid body, which is located radially outside the thin-walled breakable line and radially inside the seal wall. The lower end of is located below the thin-walled breakable line,
A container lid characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019156934A JP7495214B2 (en) | 2019-08-29 | Container lid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019156934A JP7495214B2 (en) | 2019-08-29 | Container lid |
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| Publication Number | Publication Date |
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| JP2021031164A true JP2021031164A (en) | 2021-03-01 |
| JP7495214B2 JP7495214B2 (en) | 2024-06-04 |
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| US20020050664A1 (en) * | 2000-10-19 | 2002-05-02 | Moore Roy E. | Gate flow diverter, mold for use therewith, and method for use thereof |
| JP2005313964A (en) * | 2004-04-30 | 2005-11-10 | Yoshino Kogyosho Co Ltd | Pull-top type cap |
| JP2006123205A (en) * | 2004-10-26 | 2006-05-18 | Nishikawa Kasei Co Ltd | Skin-integrated molded product |
| JP2009179380A (en) * | 2008-01-31 | 2009-08-13 | Yoshino Kogyosho Co Ltd | Hinged cap |
| JP2009196289A (en) * | 2008-02-25 | 2009-09-03 | Nippon Plast Co Ltd | Injection molding die and resin molded product |
| JP2010030656A (en) * | 2008-07-30 | 2010-02-12 | Yoshino Kogyosho Co Ltd | Hinged cap |
| JP2014080237A (en) * | 2012-09-28 | 2014-05-08 | Yoshino Kogyosho Co Ltd | Hinge cap |
| JP2019038597A (en) * | 2017-08-28 | 2019-03-14 | 東京ライト工業株式会社 | Cap separable from container mouth |
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020050664A1 (en) * | 2000-10-19 | 2002-05-02 | Moore Roy E. | Gate flow diverter, mold for use therewith, and method for use thereof |
| JP2005313964A (en) * | 2004-04-30 | 2005-11-10 | Yoshino Kogyosho Co Ltd | Pull-top type cap |
| JP2006123205A (en) * | 2004-10-26 | 2006-05-18 | Nishikawa Kasei Co Ltd | Skin-integrated molded product |
| JP2009179380A (en) * | 2008-01-31 | 2009-08-13 | Yoshino Kogyosho Co Ltd | Hinged cap |
| JP2009196289A (en) * | 2008-02-25 | 2009-09-03 | Nippon Plast Co Ltd | Injection molding die and resin molded product |
| JP2010030656A (en) * | 2008-07-30 | 2010-02-12 | Yoshino Kogyosho Co Ltd | Hinged cap |
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| JP2019038597A (en) * | 2017-08-28 | 2019-03-14 | 東京ライト工業株式会社 | Cap separable from container mouth |
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