JP7500136B2

JP7500136B2 - Plastic Moldings

Info

Publication number: JP7500136B2
Application number: JP2020162343A
Authority: JP
Inventors: 亨佐原; 尚杉山; 雅治江崎
Original assignee: Nippon Closures Co Ltd
Current assignee: Nippon Closures Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2024-06-17
Anticipated expiration: 2040-09-28
Also published as: JP2022055008A

Description

本発明は、容器に固定される本体と、本体に被さって容器を閉塞可能な上蓋とで構成されたプラスチック成形体に関する。 The present invention relates to a plastic molded body that is composed of a main body that is fixed to a container and a top lid that can be fitted over the main body to close the container.

従来、容器口部や吐出キャップ等を閉塞するプラスチック成形体として、容器に固定された本体と、本体に係止して注ぎ口を塞ぐ上蓋とをヒンジ接続したプラスチック成形体が特許文献１等で公知である。 Conventionally, as a plastic molded body for closing a container mouth or a dispensing cap, a plastic molded body in which a main body fixed to the container and a top lid that engages with the main body to close the spout are hingedly connected is known, for example from Patent Document 1.

この特許文献１に記載のプラスチック成形体（合成樹脂製容器蓋２）は、本体（容器蓋本体４）と、上蓋（冠帽部６）とを有し、上蓋（冠帽部６）の天面（天面壁３８）にはシール壁（４２）が天面（天面壁３８）から垂下しており、本体（容器蓋本体４）の頂板部（底壁８）には注出案内壁（２２）が設けられている。
このプラスチック成形体（合成樹脂製容器蓋２）は、頂板部（底壁８）には円形切取領域（２６）が形成されており、円形切取領域（２６）を切り取って生成した開口部（排出開口）を通して容器内の液体を注出できるものである。 The plastic molded body (synthetic resin container lid 2) described in Patent Document 1 has a main body (container lid main body 4) and a top lid (crown cap portion 6), with a sealing wall (42) hanging down from the top surface (top wall 38) of the top lid (crown cap portion 6), and a pouring guide wall (22) is provided on the top plate portion (bottom wall 8) of the main body (container lid main body 4).
This plastic molded body (synthetic resin container lid 2) has a circular cutout area (26) formed in the top plate portion (bottom wall 8), and liquid inside the container can be poured out through an opening (discharge opening) created by cutting out the circular cutout area (26).

また、円形切取領域を切り取るといった開封時の手間の削減が求められている場合では、特許文献２に記載のプラスチック成形体（ヒンジキャップ１）が使用されることもある。
この特許文献２に記載のプラスチック成形体（ヒンジキャップ１）は、本体（キャップ本体２）と、上蓋（外蓋４）と、内蓋（５）とを有し、内蓋（５）は上蓋（外蓋４）の上蓋天面（天壁１５）から垂下した筒壁（１７）内に収まり、内蓋（５）には天面の外周縁から垂下する壁部（２３）と、壁部（２３）よりも内側の天面から垂下するインナーリング（２２）とが設けられている。 Furthermore, in cases where it is desired to reduce the effort required for opening, such as by cutting off the circular cut-out area, the plastic molded body (hinge cap 1) described in Patent Document 2 may be used.
The plastic molded body (hinge cap 1) described in Patent Document 2 has a main body (cap main body 2), a top lid (outer lid 4), and an inner lid (5). The inner lid (5) is contained within a tubular wall (17) that hangs down from the top surface (top wall 15) of the top lid (outer lid 4). The inner lid (5) has a wall portion (23) that hangs down from the outer peripheral edge of the top surface, and an inner ring (22) that hangs down from the top surface more inward than the wall portion (23).

このプラスチック成形体（ヒンジキャップ１）は、本体（キャップ本体２）の本体天面（頂壁７）に、口部（６ａ）を先端に備えた注出筒（６）が設けられており、上蓋（外蓋４）によって本体（キャップ本体２）を閉じることで、注出筒（６）の内周面とインナーリング（２２）の外周面とが密接するとともに、注出筒（６）の外周面と壁部（２３）の内周面とが密接することで注出筒（６）を密封しており、開封時は、上蓋（外蓋４）を本体（キャップ本体２）から離脱させることのみで、円形切取領域を切り取るといった動作を必要とせず、ワンアクションで内蓋（５）を注出筒（６）から離脱させてプラスチック成形体（ヒンジキャップ１）を開封できるものである。 This plastic molded body (hinge cap 1) has a dispensing tube (6) with a mouth (6a) at its tip provided on the top surface (top wall 7) of the main body (cap main body 2), and by closing the main body (cap main body 2) with the top lid (outer lid 4), the inner peripheral surface of the dispensing tube (6) and the outer peripheral surface of the inner ring (22) come into close contact with each other, and the outer peripheral surface of the dispensing tube (6) and the inner peripheral surface of the wall portion (23) come into close contact with each other, sealing the dispensing tube (6). When opening, the plastic molded body (hinge cap 1) can be opened by simply removing the top lid (outer lid 4) from the main body (cap main body 2), without the need to cut out the circular cutout area, and by removing the inner lid (5) from the dispensing tube (6) with a single action.

特開２０００－３２７００５号公報JP 2000-327005 A 特開２０１４－１６２４９９号公報JP 2014-162499 A

しかしながら、上記特許文献等で公知のプラスチック成形体には、未だ改善の余地があった。
すなわち、特許文献２で公知のヒンジキャップは、内蓋を外蓋やキャップ本体と別部材で構成しているため、ヒンジキャップとは別に内蓋を成形するための金型作成費用や内蓋を外蓋に取付ける組立工程の増加等、製造コストが増加してしまう虞があった。 However, there is still room for improvement in the plastic molded articles known in the above patent documents and the like.
In other words, in the hinge cap known from Patent Document 2, the inner lid is made of a separate part from the outer lid and the cap body, so there was a risk of increased manufacturing costs, such as the cost of creating a mold to mold the inner lid separately from the hinge cap and the additional assembly process of attaching the inner lid to the outer lid.

また、特許文献１で公知の合成樹脂製容器蓋では、円形切取領域を切り取り後、シール壁の外周面と注出案内壁の内周面とを密接にすることで密封状態としているが、シール壁を単に注出案内壁に接触させるだけでは密接力が弱く、振動や落下時の衝撃によって上蓋が変形した際にシール壁と注出案内壁との密接が一時的に解除され、容器内の内容物が漏出する虞があった。
また、特許文献２で公知のヒンジキャップでは、注出筒の内周面および外周面をインナーリングおよび壁部で挟みこむように密封しているが、外蓋と内蓋とは別体で形成されているため、注出筒と内蓋との密接の強度や外蓋の開封時の勢いによっては、内蓋が外蓋から外れてしまい注出筒に残って開封不良になってしまう虞があった。 Furthermore, in the synthetic resin container lid known from Patent Document 1, after the circular cut-out area is cut away, the outer peripheral surface of the sealing wall and the inner peripheral surface of the pouring guide wall are brought into tight contact to create a sealed state. However, simply bringing the sealing wall into contact with the pouring guide wall does not provide a strong sealing force, and when the top lid is deformed by vibration or impact when dropped, the tight contact between the sealing wall and the pouring guide wall is temporarily released, which may cause the contents inside the container to leak out.
In addition, in the hinge cap known from Patent Document 2, the inner and outer circumferential surfaces of the pouring tube are sealed by being sandwiched between an inner ring and a wall portion, but because the outer lid and the inner lid are formed separately, depending on the strength of the seal between the pouring tube and the inner lid and the force used when opening the outer lid, there was a risk that the inner lid would come off the outer lid and remain in the pouring tube, resulting in poor opening.

本発明はこれらの問題点を解決するものであり、簡単な構成で、製造コストの増加を抑制でき、確実に開封可能で、耐振動・耐落下衝撃性の高いプラスチック成形体を提供することを目的とするものである。 The present invention aims to solve these problems by providing a plastic molded body that has a simple structure, can suppress increases in manufacturing costs, can be opened reliably, and has high resistance to vibration and drop impacts.

本発明のプラスチック成形体は、容器に固定される本体と、前記本体に被さって容器を閉塞可能な上蓋とを有するプラスチック成形体であって、前記本体には頂板部と前記頂板部から垂下するスカート部とが設けられ、前記頂板部には、容器内外を連通する開口部と、前記開口部を取り囲む筒状に形成された注出用ノズルとが設けられ、前記上蓋には天面と前記天面の外周縁から垂下する周状壁とが設けられ、前記上蓋は、前記天面の前記周状壁よりも内側から下方に突出する突出部をさらに有し、前記突出部は、前記注出用ノズル内に進入可能に構成され、前記突出部の下部には、薄肉に形成された薄肉部を介して接続された弾性シール片が設けられ、前記弾性シール片の内面側には、前記注出用ノズルの内周面に密着可能な環状シール面が形成され、前記弾性シール片は上方へ向かって内外面を反転可能に構成され、前記弾性シール片の下端部には、反転補助延長部が設けられていることにより、前記課題を解決するものである。
また、本発明のプラスチック成形体は、容器に固定される本体と、前記本体に被さって容器を閉塞可能な上蓋とを有するプラスチック成形体であって、前記本体には頂板部と前記頂板部から垂下するスカート部とが設けられ、前記頂板部には、容器内外を連通する開口部と、前記開口部を取り囲む筒状に形成された注出用ノズルとが設けられ、前記上蓋には天面と前記天面の外周縁から垂下する周状壁とが設けられ、前記上蓋は、前記天面の前記周状壁よりも内側から下方に突出する突出部をさらに有し、前記突出部は、前記注出用ノズル内に進入可能に構成され、前記突出部の下部には、薄肉に形成された薄肉部を介して接続された弾性シール片が設けられ、前記弾性シール片の内面側には、前記注出用ノズルの内周面に密着可能な環状シール面が形成され、前記弾性シール片は上方へ向かって内外面を反転可能に構成され、前記突出部は、前記薄肉部よりも内側から下方に延びる接触筒部をさらに有し、前記注出用ノズルには、前記注出用ノズルの内周面から半径方向内方に突出形成された受け面が形成され、前記接触筒部の下端面と前記受け面の上面とは、前記突出部を前記注出用ノズルに進入させた際に近接または接触するように位置していることにより、前記課題を解決するものである。 The plastic molded body of the present invention is a plastic molded body having a main body fixed to a container and a top lid that can cover the main body to close the container, the main body being provided with a top plate portion and a skirt portion hanging down from the top plate portion, the top plate portion being provided with an opening communicating the inside and outside of the container and a cylindrically formed pouring nozzle surrounding the opening, the top lid being provided with a top surface and a peripheral wall hanging down from the outer periphery of the top surface, the top lid further having a protruding portion that protrudes downward from inside the peripheral wall of the top surface, the protruding portion being configured to be able to enter the pouring nozzle, an elastic seal piece being provided at a lower portion of the protruding portion and connected via a thin-walled portion formed to be thin, an annular seal surface that can be in close contact with the inner periphery of the pouring nozzle is formed on the inner side of the elastic seal piece, the elastic seal piece being configured to be able to be inverted between its inner and outer surfaces as it moves upward, and an inversion assist extension portion being provided at the lower end of the elastic seal piece , thereby solving the above-mentioned problem.
The plastic molded article of the present invention is a plastic molded article having a main body fixed to a container and a top lid capable of covering the main body to close the container, the main body being provided with a top plate portion and a skirt portion hanging down from the top plate portion, the top plate portion being provided with an opening communicating between the inside and outside of the container and a cylindrically formed pouring nozzle surrounding the opening, the top lid being provided with a top surface and a peripheral wall hanging down from the outer periphery of the top surface, the top lid further having a protruding portion protruding downward from inside the peripheral wall of the top surface, the protruding portion being configured to be able to enter into the pouring nozzle, and a thin-walled protrusion formed on a lower portion of the protruding portion. The problem is solved by providing an elastic seal piece connected to the inner circumferential surface of the pouring nozzle via a thin-walled portion formed therein, an annular seal surface capable of being intimately attached to the inner circumferential surface of the pouring nozzle is formed on the inner side of the elastic seal piece, the elastic seal piece is configured so that its inner and outer surfaces can be inverted upward, the protrusion further has a contact tube portion extending downward from inside the thin-walled portion, and the pouring nozzle is formed with a receiving surface that protrudes radially inward from the inner circumferential surface of the pouring nozzle, and the lower end surface of the contact tube portion and the upper surface of the receiving surface are positioned so as to be in close proximity to or in contact with each other when the protrusion is inserted into the pouring nozzle.

請求項１に係るプラスチック成形体によれば、突出部と弾性シール片との間には薄肉に形成された薄肉部が設けられているため、薄肉部を折り曲げて弾性シール片を反転させ突出部の外周面に弾性シール片を位置させることができ、注出用ノズルの内周面と突出部とで弾性シール片を挟み込むことができる。
これによって、環状シール面を注出用ノズルの内周面に強く密着させることができるため、注出用ノズルの封止を強固にでき、耐振動・耐落下衝撃性を向上できる。
また、環状シール面を注出用ノズルの内周面に強く密着させていることから、振動・落下衝撃によって注出用ノズルが一時的に微小変形した場合でも、注出用ノズルの変形に追従するように弾性シール片も変形するため、環状シール面と注出用ノズルとの間から内容物が漏出するようなことがない。
また、成形直後のプラスチック成形体が温まっている状態で突出部を注出用ノズルに進入させる場合は、薄肉部がより変形しやすく簡単に弾性シール片を反転させて突出部の外周面に位置させることができ、さらに薄肉部を変形させたまま冷却して薄肉部を癖付けすることで、弾性シール片を突出部の外周面側に留まらせることもできる。
また、突出部と弾性シール片と薄肉部とを一体成形することができ、これによって突出部を注出用ノズルから取り外す際に弾性シール片のみ注出用ノズル内に残って開封不良になることがなく、部品点数の増加を抑え、製造コストの増加を抑制できる。
また、弾性シール片の下部には、反転補助延長部が設けられているため、本体に上蓋を被せる際に反転補助延長部の内面側を注出用ノズルの外周面に当接させながら突出部を注出用ノズルに進入させることのみで、反転補助延長部に接続している弾性シール片を自動的に薄肉部を曲げながら反転させて注出用ノズルの外周面に簡単に移動させることができる。 According to the plastic molded body of claim 1, a thin-walled portion is provided between the protrusion and the elastic seal piece, so that the thin-walled portion can be folded to invert the elastic seal piece and position the elastic seal piece on the outer peripheral surface of the protrusion, and the elastic seal piece can be sandwiched between the inner peripheral surface of the pouring nozzle and the protrusion.
This allows the annular sealing surface to be tightly attached to the inner peripheral surface of the pouring nozzle, thereby strengthening the sealing of the pouring nozzle and improving resistance to vibration and drop impact.
In addition, because the annular sealing surface is tightly adhered to the inner peripheral surface of the pouring nozzle, even if the pouring nozzle is temporarily slightly deformed due to vibration or the impact of being dropped, the elastic sealing piece also deforms to follow the deformation of the pouring nozzle, so that the contents will not leak out from between the annular sealing surface and the pouring nozzle.
Furthermore, when the protrusion is inserted into the pouring nozzle while the plastic molded body is still warm immediately after molding, the thin-walled portion is more easily deformed, and the elastic seal piece can be easily inverted and positioned on the outer circumferential surface of the protrusion; further, by cooling the thin-walled portion while it is still deformed and giving it a shape, the elastic seal piece can be made to remain on the outer circumferential surface side of the protrusion.
In addition, the protrusion, the elastic sealing piece, and the thin-walled portion can be molded as a single unit, which prevents the elastic sealing piece from remaining inside the pouring nozzle when the protrusion is removed from the pouring nozzle, resulting in defective opening, and prevents an increase in the number of parts and manufacturing costs.
In addition, since an inversion assist extension is provided at the bottom of the elastic seal piece, when placing the top lid on the main body, by simply abutting the inner surface of the inversion assist extension with the outer peripheral surface of the pouring nozzle and inserting the protruding portion into the pouring nozzle, the elastic seal piece connected to the inversion assist extension can be easily moved to the outer peripheral surface of the pouring nozzle by automatically inverting it while bending the thin-walled portion.

請求項２に記載の構成によれば、反転補助延長部は、下方に開放した切り欠き部を有しているため、反転補助延長部が開きやすくなり、突出部を注出用ノズルに進入させる際、より一層簡単に弾性シール片を反転させて環状シール面を注出用ノズルの内周面側に密接可能な位置へ移動させることができる。 According to the configuration described in claim 2 , the inversion assist extension has a cutout portion that is open downward, making it easier for the inversion assist extension to open. When the protrusion is inserted into the dispensing nozzle, the elastic seal piece can be more easily inverted and the annular seal surface can be moved to a position where it can come into close contact with the inner surface of the dispensing nozzle.

請求項３に記載の構成によれば、本体と上蓋とは、一体成形されているため、金型の作製数を削減でき、コストアップを抑制できる。
また、本体と上蓋とは、ヒンジを介して接続されているため、開閉時の上蓋の動作を安定させることができ、より確実に突出部を注出用ノズルへ進入させることができる。
請求項４に記載の構成によれば、突出部と弾性シール片との間には薄肉に形成された薄肉部が設けられているため、薄肉部を折り曲げて弾性シール片を反転させ突出部の外周面に弾性シール片を位置させることができ、注出用ノズルの内周面と突出部とで弾性シール片を挟み込むことができる。
これによって、環状シール面を注出用ノズルの内周面に強く密着させることができるため、注出用ノズルの封止を強固にでき、耐振動・耐落下衝撃性を向上できる。
また、環状シール面を注出用ノズルの内周面に強く密着させていることから、振動・落下衝撃によって注出用ノズルが一時的に微小変形した場合でも、注出用ノズルの変形に追従するように弾性シール片も変形するため、環状シール面と注出用ノズルとの間から内容物が漏出するようなことがない。
また、成形直後のプラスチック成形体が温まっている状態で突出部を注出用ノズルに進入させる場合は、薄肉部がより変形しやすく簡単に弾性シール片を反転させて突出部の外周面に位置させることができ、さらに薄肉部を変形させたまま冷却して薄肉部を癖付けすることで、弾性シール片を突出部の外周面側に留まらせることもできる。
また、突出部と弾性シール片と薄肉部とを一体成形することができ、これによって突出部を注出用ノズルから取り外す際に弾性シール片のみ注出用ノズル内に残って開封不良になることがなく、部品点数の増加を抑え、製造コストの増加を抑制できる。
また、突出部は、薄肉部よりも内側から下方に延びる接触筒部をさらに有し、注出用ノズルには、注出用ノズルの内周面から半径方向内方に突出形成された受け面が形成され、接触筒部の下端面と受け面の上面とは、突出部を注出用ノズルに進入させた際に近接または接触するように位置しているため、突出部が注出用ノズルに過剰に進入することを防ぐことができ、環状シール面と注出用ノズルとの密接位置を適正な位置に留めることができる。
また、落下衝撃等を受けた際、突出部が注出用ノズルへさらに進入する方向へ力を受けても、接触筒部が受け面に支持されることから、環状シール面と注出用ノズルとの密接位置を維持でき、密閉性能が劣化することがない。 According to the third aspect of the present invention, the main body and the upper cover are integrally molded, so that the number of molds required can be reduced, and an increase in costs can be suppressed.
Furthermore, since the main body and the top lid are connected via a hinge, the movement of the top lid when opening and closing can be stabilized, and the protrusion can be inserted into the dispensing nozzle more reliably.
According to the configuration described in claim 4 , a thin-walled portion is provided between the protrusion and the elastic seal piece, so that the thin-walled portion can be folded to invert the elastic seal piece and position the elastic seal piece on the outer peripheral surface of the protrusion, and the elastic seal piece can be sandwiched between the inner peripheral surface of the pouring nozzle and the protrusion.
This allows the annular sealing surface to be tightly attached to the inner peripheral surface of the pouring nozzle, thereby strengthening the sealing of the pouring nozzle and improving resistance to vibration and drop impact.
In addition, because the annular sealing surface is tightly adhered to the inner peripheral surface of the pouring nozzle, even if the pouring nozzle is temporarily slightly deformed due to vibration or the impact of being dropped, the elastic sealing piece also deforms to follow the deformation of the pouring nozzle, so that the contents will not leak out from between the annular sealing surface and the pouring nozzle.
Furthermore, when the protrusion is inserted into the pouring nozzle while the plastic molded body is still warm immediately after molding, the thin-walled portion is more easily deformed, and the elastic seal piece can be easily inverted and positioned on the outer circumferential surface of the protrusion; further, by cooling the thin-walled portion while it is still deformed and giving it a shape, the elastic seal piece can be made to remain on the outer circumferential surface side of the protrusion.
In addition, the protrusion, the elastic sealing piece, and the thin-walled portion can be molded as a single unit, which prevents the elastic sealing piece from remaining inside the pouring nozzle when the protrusion is removed from the pouring nozzle, resulting in defective opening, and prevents an increase in the number of parts and manufacturing costs.
In addition, the protrusion further has a contact tube portion extending downward from the inside of the thin-walled portion, and the pouring nozzle is formed with a receiving surface that protrudes radially inward from the inner surface of the pouring nozzle, and the lower end surface of the contact tube portion and the upper surface of the receiving surface are positioned so as to be in close proximity to or in contact when the protrusion is inserted into the pouring nozzle, thereby preventing the protrusion from excessively inserting into the pouring nozzle and keeping the close contact position between the annular sealing surface and the pouring nozzle in an appropriate position.
Furthermore, even if the protrusion receives a force in a direction that causes it to advance further into the dispensing nozzle when it is dropped or otherwise impacted, the contact tube portion is supported by the receiving surface, so that the close contact position between the annular sealing surface and the dispensing nozzle can be maintained, and the sealing performance will not deteriorate.

請求項５に記載の構成によれば、受け面の上面は、注出用ノズルの内周面から半径方向内方に向かうに従って、上方へ傾斜する傾斜面であるため、突出部が注出用ノズルへ進入する際の押し込みや落下衝撃等を受けた際に接触筒部が受け面に押し付けられた際、接触筒部は受け面の傾斜面に沿って半径方向外方へ広がる力を受け、突出部を介して環状シール面も注出用ノズルの内周面側へ広がる力を受けてより一層注出用ノズルの封止を強固にできる。 According to the configuration described in claim 5 , the upper surface of the receiving surface is an inclined surface that slopes upward as it moves radially inward from the inner surface of the pouring nozzle, so that when the contact tube portion is pressed against the receiving surface when the protruding portion is pushed in to enter the pouring nozzle or is subjected to a drop impact, the contact tube portion is subjected to a force that spreads radially outward along the inclined surface of the receiving surface, and the annular sealing surface is also subjected to a force that spreads toward the inner surface of the pouring nozzle via the protruding portion, thereby further strengthening the sealing of the pouring nozzle.

本発明の一実施形態に係るプラスチック成形体１００の斜視図。1 is a perspective view of a plastic molded body 100 according to an embodiment of the present invention. 本発明の一実施形態に係るプラスチック成形体１００の上面図。1 is a top view of a plastic molded body 100 according to an embodiment of the present invention. 本発明の一実施形態に係るプラスチック成形体１００の側面断面図。1 is a side cross-sectional view of a plastic molded body 100 according to an embodiment of the present invention. 本発明の一実施形態に係るプラスチック成形体１００の閉栓途中の状態を示す側面断面図。FIG. 2 is a side cross-sectional view showing a state in which the plastic molded body 100 according to one embodiment of the present invention is in the middle of being capped. 本発明の一実施形態に係るプラスチック成形体１００の閉栓後の状態を示す側面断面図。FIG. 2 is a side cross-sectional view showing the state of the plastic molded body 100 according to one embodiment of the present invention after capping. 本発明の一実施形態に係るプラスチック成形体１００の開栓後の状態を示す側面断面図。FIG. 2 is a side cross-sectional view showing the state after the plastic molded body 100 according to one embodiment of the present invention has been opened. 本発明の他の実施形態に係るプラスチック成形体１００の、受け面１１８を周方向連続して設けた変形例を示す斜視図。FIG. 13 is a perspective view showing a modified example of the plastic molded body 100 according to another embodiment of the present invention, in which the receiving surface 118 is provided continuously in the circumferential direction. 本発明の他の実施形態に係るプラスチック成形体１００に、補助シールリング１３５および補助円筒面１３６を設けた変形例を示す断面図。13 is a cross-sectional view showing a modified example in which an auxiliary seal ring 135 and an auxiliary cylindrical surface 136 are provided in the plastic molded body 100 according to another embodiment of the present invention. FIG.

以下に本発明の一実施形態に係るプラスチック成形体１００について、図面に基づいて説明する。
なお、説明のため、プラスチック成形体１００が固定される容器は図示しない。
プラスチック成形体１００は、図１乃至図３に示すように、容器に固定される本体であるキャップ本体１１０と、キャップ本体１１０に被さって容器を閉塞可能な上蓋１２０とを有している。 A plastic molded body 100 according to one embodiment of the present invention will be described below with reference to the drawings.
For the sake of explanation, the container in which the plastic molded body 100 is fixed is not shown.
As shown in FIGS. 1 to 3, the plastic molded body 100 has a cap body 110 which is a main body fixed to a container, and an upper lid 120 which is capable of covering the cap body 110 to close the container.

キャップ本体１１０には、開口部１１２を有した頂板部１１１と、頂板部１１１の上方からリング状に突出する係止リング１１９と、頂板部１１１の外周縁から垂下するスカート部１１４と、スカート部１１４よりも内側から開口部１１２を囲むように垂下する嵌合筒１１３とが設けられ、スカート部１１４の下部内周側には、半径方向内方に突出した嵌合部１１５が形成されている。
キャップ本体１１０は、容器の口部をスカート部１１４と嵌合筒１１３とで挟むように嵌合し、嵌合部１１５で抜け止めしている。 The cap body 110 is provided with a top plate portion 111 having an opening 112, a locking ring 119 protruding in a ring shape from above the top plate portion 111, a skirt portion 114 hanging down from the outer peripheral edge of the top plate portion 111, and a fitting tube 113 hanging down from inside the skirt portion 114 to surround the opening 112, and a fitting portion 115 protruding radially inward is formed on the lower inner peripheral side of the skirt portion 114.
The cap body 110 is fitted to the mouth of the container so as to sandwich the mouth of the container between the skirt portion 114 and the fitting tube 113, and is prevented from coming off by the fitting portion 115.

頂板部１１０の上面側には、開口部１１２を囲むように上方へ延びる注出用ノズル１１６が設けられ、注出用ノズル１１６の上端には注ぎ口１１７が形成され、注出用ノズル１１６の内周面には半径方向内方に突出形成された受け面１１８が等間隔に３つ設けられている。
受け面１１８の上面は、注出用ノズル１１６の内周面から半径方向内方に向かうに従って、上方へ傾斜する傾斜面で形成されており、受け面１１８の下部には、ゲート１３３が接続されている。 A pouring nozzle 116 extending upward to surround the opening 112 is provided on the upper surface of the top plate portion 110, and a spout 117 is formed at the upper end of the pouring nozzle 116. Three receiving surfaces 118 are formed at equal intervals on the inner surface of the pouring nozzle 116 and protrude radially inward.
The upper surface of the receiving surface 118 is formed as an inclined surface that slopes upward as it moves radially inward from the inner circumferential surface of the pouring nozzle 116, and a gate 133 is connected to the lower part of the receiving surface 118.

上蓋１２０は、天面１２１と、天面１２１の外周縁から垂下する周状壁１２２とが設けられ、周状壁１２２よりも内側にはアウターリング１３０が形成され、アウターリング１３０よりも内側には突出部１２３が形成されている。
周状壁１２２の開口側の内周面には、係止リング１１９と係合可能な係止部１３４が形成されている。
突出部１２３の下部、すなわち、天面１２１に接続されていない先端側には、突出部１２３の外面に沿うように弾性シール片１２５が設けられており、突出部１２３と弾性シール片１２５とは、薄肉に形成された薄肉部１２４によって接続されている。
なお、弾性シール片１２５は、薄肉部１２４側から薄肉部１２４と接続されていない端部側に向かって拡径、すなわち、突出部１２３の外面から遠ざかる方向へ徐々に拡がるように形成されている。 The upper cover 120 has a top surface 121 and a peripheral wall 122 that hangs down from the outer periphery of the top surface 121. An outer ring 130 is formed inside the peripheral wall 122, and a protrusion 123 is formed inside the outer ring 130.
An engaging portion 134 that can engage with the engaging ring 119 is formed on the inner circumferential surface of the peripheral wall 122 on the opening side.
An elastic seal piece 125 is provided on the lower part of the protrusion 123, i.e., the tip side not connected to the top surface 121, so as to fit along the outer surface of the protrusion 123, and the protrusion 123 and the elastic seal piece 125 are connected by a thin-walled portion 124 which is formed to be thin.
In addition, the elastic seal piece 125 is formed so as to gradually expand in diameter from the thin-walled portion 124 side toward the end side that is not connected to the thin-walled portion 124, that is, to gradually expand in the direction away from the outer surface of the protrusion portion 123.

弾性シール片１２５は、半径方向内方側に曲面状に突出形成された環状シール面１２６を有しており、弾性シール片１２５の先端側には、切り欠き部１２９によって周状に離間配置された反転補助延長部１２７が設けられている。
さらに、突出部１２３の先端側の、弾性シール片１２５よりも内側には、接触筒部１２８が形成されている。
なお、キャップ本体１１０と上蓋１２０とは、ヒンジ１３２で接続された一体成形品であり、上蓋１２０の周状壁１２２のうち、ヒンジ１３２との接続部と反対側には、開封用鍔１３１が形成されている。 The elastic seal piece 125 has an annular seal surface 126 that protrudes in a curved shape radially inward, and an inversion assist extension portion 127 that is circumferentially spaced apart by cutout portions 129 is provided at the tip side of the elastic seal piece 125.
Furthermore, a contact cylinder portion 128 is formed on the tip side of the protruding portion 123 and inside the elastic seal piece 125 .
The cap body 110 and the top lid 120 are an integrally molded product connected by a hinge 132, and an opening flange 131 is formed on the peripheral wall 122 of the top lid 120 on the side opposite the connection with the hinge 132.

次に、本発明の一実施形態に係るプラスチック成形体１００の、閉栓および開栓について、図３乃至図６を用いて説明する。 Next, the capping and uncapping of the plastic molded body 100 according to one embodiment of the present invention will be described with reference to Figures 3 to 6.

まず、図３の状態から上蓋１２０をヒンジ１３２を回転中心としてキャップ本体１１０に被せていくと、図４に示すように、注ぎ口１１７にヒンジ１３２側の弾性シール片１２５の内側（環状シール面１２６）が当たり始める。
このとき、弾性シール片１２５は突出部１２３と薄肉部１２４で接続されているため、薄肉部１２４の変形に伴って弾性シール片１２５が外側に倒れて反転し始める。
また、弾性シール片１２５の先端側には、反転補助延長部１２７が設けられているため、より確実に注ぎ口１１７に弾性シール片１２５の内側が当たりやすくなり、一層反転しやすくなる。 First, when top lid 120 is placed on cap body 110 from the state shown in FIG. 3 with hinge 132 as the center of rotation, the inside (annular seal surface 126) of elastic seal piece 125 on the hinge 132 side begins to contact spout 117 as shown in FIG.
At this time, since the elastic seal pieces 125 are connected to the protruding portions 123 and the thin portions 124, the elastic seal pieces 125 start to fall outward and turn over as the thin portions 124 are deformed.
Furthermore, since an inversion assist extension portion 127 is provided on the tip side of elastic seal piece 125, the inside of elastic seal piece 125 can more reliably contact spout 117, making it even easier to invert.

さらに上蓋１２０をキャップ本体１１０に被せていくと、弾性シール片１２５はヒンジ１３２に近い側から次々に注ぎ口１１７に接触して外側に倒れて反転することで、環状シール面１２６が外側に向く。
上蓋１２０がキャップ本体１１０に被さる際、突出部１２３は注出用ノズル１１６内に進入するため、反転した弾性シール片１２５も注出用ノズル１１６内へ引き込まれ、上蓋１２０がキャップ本体１１０に完全に被さると、図５に示すように、係止リング１１９と係止部１３４とが係合して上蓋１２０はキャップ本体１１０に係止され、アウターリング１３０は注ぎ口１１７の外縁に沿うように位置し、注出用ノズル１１６の内面と突出部１２３の外面とで弾性シール片１２５（環状シール面１２６）を挟むようにして密着する。 As top lid 120 is further placed over cap body 110, elastic seal pieces 125 come into contact with spout 117 one after another, starting from the side closest to hinge 132, and fall outward and invert, so that annular seal surface 126 faces outward.
When the top cover 120 is placed over the cap body 110, the protrusion 123 enters the pouring nozzle 116, so that the inverted elastic seal piece 125 is also drawn into the pouring nozzle 116. When the top cover 120 completely covers the cap body 110, as shown in FIG. 5, the locking ring 119 engages with the locking portion 134 to lock the top cover 120 to the cap body 110, and the outer ring 130 is positioned along the outer edge of the spout 117, so that the elastic seal piece 125 (annular seal surface 126) is sandwiched between the inner surface of the pouring nozzle 116 and the outer surface of the protrusion 123, thereby tightly sealing the elastic seal piece 125 (annular seal surface 126).

これによって、周状に連続した環状シール面１２６が注ぎ口１１７の内面と隙間なく密着できるため、注ぎ口１１７に連通する開口部１１２を塞ぐことができ、容器内の内容液の漏出を防止できる。
また、振動・落下衝撃によって一時的に注出用ノズル１１６が変形した場合でも、注出用ノズル１１６の変形に追従するように弾性シール片１２５も変形するため、環状シール面１２６と注出用ノズル１１６との間から内容液が漏出することがない。
さらに、弾性シール片１２５を弾性変形しやすい材料で構成すれば、注出用ノズル１１６の内面と環状シール面１２６との密着をより強固にでき、容器内の内容液の漏出をより一層防止できる。 This allows the circumferentially continuous annular sealing surface 126 to fit tightly with the inner surface of the spout 117 without any gaps, thereby blocking the opening 112 communicating with the spout 117 and preventing the liquid contents in the container from leaking out.
Furthermore, even if the dispensing nozzle 116 is temporarily deformed due to vibration or the impact of being dropped, the elastic seal piece 125 also deforms to follow the deformation of the dispensing nozzle 116, so that the liquid contents will not leak out from between the annular seal surface 126 and the dispensing nozzle 116.
Furthermore, if the elastic seal piece 125 is made of a material that is easily elastically deformed, the adhesion between the inner surface of the pouring nozzle 116 and the annular seal surface 126 can be made stronger, further preventing leakage of the content liquid within the container.

ここで、突出部１２３には接触筒部１２８が設けられ、注出用ノズル１１６の内面には受け面１１８が形成されているため、閉栓動作の方法や落下衝撃によって、上蓋１２０を過剰にキャップ本体１１０に押し付けてしまった場合でも、接触筒部１２８が受け面１１８に近接または接触することで、突出部１２３が注出用ノズル１１６内に過剰に進入することを防ぐことができ、閉栓時の注出用ノズル１１６の内面と環状シール面１２６との密着をより一層安定させることができる。
また、受け面１１８の上面は、注出用ノズル１１６の内周面から半径方向内方に向かうに従って、上方へ傾斜する傾斜面で形成されているため、接触筒部１２８が受け面１１８に押し付けられると、接触筒部１２８は受け面１１８の傾斜面に沿って半径方向外方へ広がる力を受け、突出部１２３を介して環状シール面１２６も注出用ノズル１１６の内周面側へ広がる力を受けてより一層注出用ノズル１１６の封止を強固にできる。 Here, a contact tube portion 128 is provided on the protrusion 123, and a receiving surface 118 is formed on the inner surface of the dispensing nozzle 116. Therefore, even if the top lid 120 is pressed excessively against the cap body 110 due to the method of the capping operation or the impact of being dropped, the contact tube portion 128 comes close to or into contact with the receiving surface 118, thereby preventing the protrusion 123 from penetrating excessively into the dispensing nozzle 116, and making the adhesion between the inner surface of the dispensing nozzle 116 and the annular sealing surface 126 when the cap is closed even more stable.
In addition, since the upper surface of the receiving surface 118 is formed as an inclined surface that slopes upward as it moves radially inward from the inner surface of the dispensing nozzle 116, when the contact tube portion 128 is pressed against the receiving surface 118, the contact tube portion 128 is subjected to a force that spreads radially outward along the inclined surface of the receiving surface 118, and the annular sealing surface 126 is also subjected to a force that spreads toward the inner surface of the dispensing nozzle 116 via the protrusion 123, thereby further strengthening the sealing of the dispensing nozzle 116.

開栓する際は、開封用鍔１３１を上方に向けて押し上げて上蓋１２０を離脱させるように動作させることで係止リング１１９と係止部１３４との係合を解除し、注出用ノズル１１６から突出部１２３を抜く。
このとき、薄肉部１２４は閉栓時に折り曲げられてクセ付けされているため、図６に示すように弾性シール片１２５は反転した状態を維持したまま開栓される。 When opening the bottle, the opening flange 131 is pushed upward to remove the top lid 120, thereby releasing the engagement between the locking ring 119 and the locking portion 134, and the protrusion 123 is removed from the pouring nozzle 116.
At this time, since the thin portion 124 has been bent and shaped when the cap is closed, the elastic seal piece 125 is opened while maintaining the inverted state as shown in FIG.

なお、プラスチック成形体１００を成形直後に閉栓することで、冷却されていない状態の薄肉部１２４が曲がりやすく簡単に弾性シール片１２５を反転でき、プラスチック成形体１００が冷却した後に閉栓する場合に比べて、薄肉部１２４のクセ付けが容易に実施できる。
また、キャップ本体１１０は容器に固定されるものであればその形態は特に限定されず、ペットボトル等の容器の口部に嵌合固定される構成だけでなく、パウチ等の容器の口部に溶着固定されたスパウト状に形成されたものも含むものである。 Furthermore, by capping the plastic molded body 100 immediately after molding, the thin-walled portion 124 in an uncooled state is easily bent, and the elastic seal piece 125 can be easily inverted, making it easier to shape the thin-walled portion 124 than when the plastic molded body 100 is capped after it has cooled.
Furthermore, the shape of the cap body 110 is not particularly limited as long as it is fixed to a container, and includes not only a configuration in which it is fitted and fixed to the mouth of a container such as a PET bottle, but also a configuration in which it is formed into a spout shape and welded and fixed to the mouth of a container such as a pouch.

また、注出用ノズル１１６の内周面に形成される受け面１１８は、必ずしも等間隔に３つ設けられる必要はなく、図７に示すように、受け面１１８が周方向に連続して設けられていてもよい。
また、図８に示すように、受け面１１８を周方向に連続して設けた場合は、受け面１１８の内周側に周方向に連続した補助円筒面１３６を形成できるため、突出部１２３の先端側の弾性シール片１２５よりも内側に、補助円筒面１３６に密着可能な外径の補助シールリング１３５を設けることで、上蓋１２０を閉じてキャップ本体１１０に係止した際、環状シール面１２６と注出用ノズル１１６の内周面とが密着するとともに、補助円筒面１３６と補助シールリング１３５とが密着するため、さらに一層注出用ノズル１１６の封止を強固にできる。 Furthermore, the receiving surfaces 118 formed on the inner peripheral surface of the dispensing nozzle 116 do not necessarily need to be provided in three equally spaced locations, and as shown in FIG. 7, the receiving surfaces 118 may be provided continuously in the circumferential direction.
Furthermore, as shown in FIG. 8, when the receiving surface 118 is provided continuously in the circumferential direction, a circumferentially continuous auxiliary cylindrical surface 136 can be formed on the inner side of the receiving surface 118. By providing an auxiliary seal ring 135 with an outer diameter that can fit closely to the auxiliary cylindrical surface 136 inside the elastic seal piece 125 on the tip side of the protrusion 123, when the top lid 120 is closed and engaged with the cap body 110, the annular seal surface 126 and the inner surface of the pouring nozzle 116 come into close contact, and the auxiliary cylindrical surface 136 and the auxiliary seal ring 135 also come into close contact, thereby further strengthening the sealing of the pouring nozzle 116.

ここで、本発明の一実施形態に係るプラスチック成形体１００の製造過程の一例を説明する。
プラスチック成形体１００は、まず、図３に示すような状態でポリエチレンを材料に射出成形された直後、プラスチック成形体１００が冷却していないうちに、図５に示すように上蓋１２０を閉じてキャップ本体１１０に係止して、薄肉部１２４が柔らかいうちに弾性シール片１２５を反転する。
上蓋１２０を閉じてキャップ本体１１０に係止したプラスチック成形体１００は、図５に示すような状態で内容物の充填された容器の口部に固定されることで、容器を密封する。 Here, an example of a manufacturing process for the plastic molded body 100 according to one embodiment of the present invention will be described.
First, immediately after the plastic molded body 100 is injection molded using polyethylene as the material in the state shown in FIG. 3, before the plastic molded body 100 has cooled, the top lid 120 is closed and engaged with the cap body 110 as shown in FIG. 5, and the elastic seal piece 125 is inverted while the thin-walled portion 124 is still soft.
The plastic molded body 100 with the top lid 120 closed and engaged with the cap body 110 is fixed to the mouth of a container filled with contents in the state shown in FIG. 5, thereby sealing the container.

次に、容器の口部に固定されたプラスチック成形体１００の注出用ノズル１１６から内容物を取り出す手順の一例を説明する。
内容物を取り出す際は、上蓋１２０をキャップ本体１１０から離脱させて注出用ノズル１１６から突出部１２３を抜く。 Next, an example of a procedure for discharging the contents from the dispensing nozzle 116 of the plastic molded body 100 fixed to the mouth of a container will be described.
When removing the contents, the top cover 120 is detached from the cap body 110 and the protruding portion 123 is removed from the dispensing nozzle 116 .

このとき、既にプラスチック成形体１００は射出成形後から時間が経過して十分に冷却されているため、薄肉部１２４は曲がった状態を維持し、図６に示すように弾性シール片１２５も射出成形直後の位置には戻らず、反転した状態を維持する。
内容物を取り出した後、上蓋１２０をキャップ本体１１０に再び被せることで、突出部１２３は再び注出用ノズル１１６内に入り込み、図３に示すように環状シール面１２６は注出用ノズル１１６の内周面に密着して再封止を完了する。 At this time, since the plastic molded body 100 has already been sufficiently cooled down due to the passage of time since injection molding, the thin-walled portion 124 maintains its bent state, and the elastic seal piece 125 does not return to the position it was in immediately after injection molding, but maintains its inverted state, as shown in FIG.
After the contents are removed, the top lid 120 is replaced on the cap body 110, so that the protrusion 123 again enters the dispensing nozzle 116, and the annular sealing surface 126 adheres closely to the inner surface of the dispensing nozzle 116 as shown in Figure 3, completing the resealing.

以上、本発明の実施形態を詳述したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。 Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the invention described in the claims.

なお、上述した実施形態では、プラスチック成形体はキャップ本体と上蓋とをヒンジで接続した一体成形品であるとして説明したが、プラスチック成形体の構成はこれに限定されず、例えば、ヒンジを設けずにキャップ本体と上蓋とが別体で構成されていてもよく、ヒンジの代わりにキャップ本体と上蓋とをピンで連結してピンを回転中心として開閉栓可能に構成してもよい。
また、上述した実施形態では、受け面の上面は、注出用ノズルの内周面から半径方向内方に向かうに従って、上方へ傾斜する傾斜面で形成されているものとして説明したが、受け面の上面の形状はこれに限定されず、例えば、受け面の上面が均一な水平面で形成されていてもよく、受け面の上面が無数の突起状に形成されていてもよい。 In the above-described embodiment, the plastic molded body has been described as an integrally molded product in which the cap body and the top lid are connected by a hinge, but the configuration of the plastic molded body is not limited to this. For example, the cap body and the top lid may be configured as separate bodies without providing a hinge, or instead of a hinge, the cap body and the top lid may be connected by a pin so that the pin can be rotated around the center of opening and closing.
In addition, in the above-described embodiment, the upper surface of the receiving surface is described as being formed as an inclined surface that slopes upward as it moves radially inward from the inner surface of the pouring nozzle, but the shape of the upper surface of the receiving surface is not limited to this, and for example, the upper surface of the receiving surface may be formed as a uniform horizontal surface, or the upper surface of the receiving surface may be formed in the shape of countless protrusions.

また、上述した実施形態では、弾性シール片の先端側には、切り欠き部によって周状に離間配置された反転補助延長部が設けられているものとして説明したが、弾性シール片周辺の構成はこれに限定されず、例えば、反転補助延長部がなくてもよく、反転補助延長部が切り欠き部を有することなく周方向均一に形成されていてもよい。 In addition, in the above-mentioned embodiment, the tip side of the elastic seal piece is described as having a reversal assist extension portion spaced apart circumferentially by a cutout portion, but the configuration around the elastic seal piece is not limited to this. For example, there may be no reversal assist extension portion, or the reversal assist extension portion may be formed uniformly in the circumferential direction without having a cutout portion.

１００・・・プラスチック成形体
１１０・・・キャップ本体（本体）
１１１・・・頂板部
１１２・・・開口部
１１３・・・嵌合筒
１１４・・・スカート部
１１５・・・嵌合部
１１６・・・注出用ノズル
１１７・・・注ぎ口
１１８・・・受け面
１１９・・・係止リング
１２０・・・上蓋
１２１・・・天面
１２２・・・周状壁
１２３・・・突出部
１２４・・・薄肉部
１２５・・・弾性シール片
１２６・・・環状シール面
１２７・・・反転補助延長部
１２８・・・接触筒部
１２９・・・切り欠き部
１３０・・・アウターリング
１３１・・・開封用鍔
１３２・・・ヒンジ
１３３・・・ゲート
１３４・・・係止部
１３５・・・補助シールリング
１３６・・・補助円筒面

100: Plastic molded body 110: Cap body (main body)
REFERENCE SIGNS LIST 111: top plate portion 112: opening 113: fitting tube 114: skirt portion 115: fitting portion 116: pouring nozzle 117: spout 118: receiving surface 119: locking ring 120: upper cover 121: top surface 122: peripheral wall 123: protrusion portion 124: thin portion 125: elastic seal piece 126: annular seal surface 127: inversion assist extension portion 128: contact tube portion 129: cutout portion 130: outer ring 131: opening flange 132: hinge 133: gate 134: locking portion 135: auxiliary seal ring 136: Auxiliary cylindrical surface

Claims

A plastic molded body having a main body fixed to a container and a top cover capable of covering the main body to close the container,
The body is provided with a top plate portion and a skirt portion depending from the top plate portion,
The top plate portion is provided with an opening that communicates between the inside and outside of the container, and a cylindrical pouring nozzle that surrounds the opening,
The upper cover has a top surface and a peripheral wall extending downward from an outer periphery of the top surface,
The upper cover further has a protrusion that protrudes downward from the inside of the peripheral wall of the top surface,
The protrusion is configured to be able to enter the pouring nozzle,
An elastic seal piece is provided at a lower portion of the protruding portion and connected via a thin-walled portion formed in a thin wall,
An annular seal surface capable of closely contacting an inner circumferential surface of the pouring nozzle is formed on the inner surface side of the elastic seal piece,
The elastic seal piece is configured so that the inner and outer surfaces can be inverted upward ,
A plastic molded article, characterized in that a reversal assist extension portion is provided at a lower end portion of the elastic seal piece .

2. The plastic molded article according to claim 1 , wherein the inversion assist extension portion has a notch portion that is open downward.

3. The plastic molded article according to claim 1, wherein the main body and the top cover are integrally molded and connected via a hinge.

A plastic molded body having a main body fixed to a container and a top cover capable of covering the main body to close the container,
The body is provided with a top plate portion and a skirt portion depending from the top plate portion,
The top plate portion is provided with an opening that communicates between the inside and outside of the container, and a cylindrical pouring nozzle that surrounds the opening,
The upper cover has a top surface and a peripheral wall extending downward from an outer periphery of the top surface,
The upper cover further has a protrusion that protrudes downward from the inside of the peripheral wall of the top surface,
The protrusion is configured to be able to enter the pouring nozzle,
An elastic seal piece is provided at a lower portion of the protruding portion and connected via a thin-walled portion formed in a thin wall,
An annular seal surface capable of being in close contact with an inner circumferential surface of the pouring nozzle is formed on the inner surface side of the elastic seal piece,
The elastic seal piece is configured so that the inner and outer surfaces can be inverted upward,
the protruding portion further includes a contact tube portion extending downward from inside the thin-walled portion,
The pouring nozzle is provided with a receiving surface that protrudes radially inward from the inner circumferential surface of the pouring nozzle,
A plastic molded body characterized in that the lower end surface of the contact tube portion and the upper surface of the receiving surface are positioned so as to be in close proximity to or in contact with each other when the protrusion is inserted into the pouring nozzle.

5. The plastic molded article according to claim 4 , wherein the upper surface of the receiving surface is an inclined surface that slopes upward from the inner circumferential surface of the protruding portion toward the inside in the radial direction.