JP3818919B2 - Plastic container with snap lid - Google Patents

Plastic container with snap lid Download PDF

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Publication number
JP3818919B2
JP3818919B2 JP2001572378A JP2001572378A JP3818919B2 JP 3818919 B2 JP3818919 B2 JP 3818919B2 JP 2001572378 A JP2001572378 A JP 2001572378A JP 2001572378 A JP2001572378 A JP 2001572378A JP 3818919 B2 JP3818919 B2 JP 3818919B2
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Japan
Prior art keywords
container
lid
seal
edge
rib
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Expired - Fee Related
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JP2004501836A (en
JP2004501836A5 (en
Inventor
ディースターベック、フランク
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ヨーケイ プラスチーク グンメルスバッハ ゲゼルシャフト ミット ベシュレンクテル ハフツング
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0204—Removable lids or covers without integral tamper element secured by snapping over beads or projections
    • B65D43/0212—Removable lids or covers without integral tamper element secured by snapping over beads or projections only on the outside, or a part turned to the outside, of the mouth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D21/00—Nestable, stackable or joinable containers; Containers of variable capacity
    • B65D21/02—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together
    • B65D21/0209—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together stackable or joined together one-upon-the-other in the upright or upside-down position
    • B65D21/0217—Containers with a closure presenting stacking elements
    • B65D21/0219—Containers with a closure presenting stacking elements the closure presenting projecting peripheral elements receiving or surrounding the bottom or peripheral elements projecting from the bottom of a superimposed container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2401/00—Tamper-indicating means
    • B65D2401/10—Tearable part of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00027—Stackable lids or covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/00074—Shape of the outer periphery curved
    • B65D2543/00092—Shape of the outer periphery curved circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00296—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B65D2543/005—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container both cup and skirt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00555—Contact between the container and the lid on the inside or the outside of the container on both the inside and the outside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00583—Means for limiting the axial insertion of the lid on the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00611—Profiles
    • B65D2543/00648—Flange or lip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00675—Periphery concerned
    • B65D2543/00685—Totality
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00712—Snapping means on the lid
    • B65D2543/00722—Profiles
    • B65D2543/0074—Massive bead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00712—Snapping means on the lid
    • B65D2543/00787—Periphery concerned
    • B65D2543/00796—Totality
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00944—Located only on the container, e.g. recesses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00953—Sealing means
    • B65D2543/00962—Sealing means inserted
    • B65D2543/00972—Collars or rings

Abstract

A plastic container with a snap lid and with a snap element provided on an upper edge area of the container for the lid to snap onto, where the lid being snapped onto the container has an area that comes into tight contact with the upper edge area of the container, the areas of the lid and of the container cooperating under tight contact generate a sealing region. The object of the invention is to design a plastic container with snap lid, which reliably fulfils special demands on leak-proofness. To this end, the sealing region between the container and the lid is provided with a circumferential seal made of a material of greater elasticity than the container and the lid and in that the seal is integrally moulded on at least one of the cooperation areas of the lid and of the container generating the sealing region. The seal can be located in a circumferential groove in the lid. The seal can have two sealing regions spaced apart that are at different angles to the main axis of the container, where the container and/or lid has areas that provide for tight contact on the sealing regions. The container and the seal are provided with elevations in the form of ribs which come into contact when the lid is on. At the height of the seal, the outer flank of the groove on the lid laterally contacts the outside of the container.

Description

【０００１】
本発明は、スナップ蓋と、この蓋をスナップ止めするために容器上部周縁部に設けられたスナップ要素とを備え、前記蓋が容器にスナップ止めされたときに容器上部周縁部と緊密に接する部分を有し、蓋のこの部分と容器上部周縁部とが緊密接触状態でシールを形成するプラスチック容器に関するものである。
【０００２】
この種のプラスチック容器は様々な物品の輸送に利用されており、特に産業及び食品関連部門においては輸送目的に極めて有効であることが判っている。しかしながら、液体もしくは低粘性物質の輸送には依然としてプラスチック容器の充分な漏洩防止性能に関する問題が残されている。これは、例えば油類、特に鉱油類のような揮発性その他の臨界性物質を輸送する場合に特に問題となる。これらの物質の輸送に用いるプラスチック容器には、容器上部周縁部と蓋とに対応形状を与えて充分な漏洩防止性能を達成する努力が種々なされてはいるものの、既知のプラスチック容器では到底満たすことのできないような高い漏洩防止性能が必須とされている。
ドイツ特許公開第４４２２５３４号公報にはスナップ蓋付きの全体的に射出成形された単一エッジプラスチック容器が開示されており、そこでは蓋を装着することにより蓋が容器の開口内に挿入されて容器内面に接し、それにより蓋の周縁部がその内側で容器周壁と密に接するようになっている。
【０００３】
本発明の目的は、漏洩防止性能に課せられる上述の特別な要求を高い信頼性で満たすことのできるスナップ蓋付きプラスチック容器を提供することである。
【０００４】
係る目的は、本発明によるスナップ蓋付きプラスチック容器によれば、容器と蓋との間のシール部として容器及び蓋よりも大なる弾性を有する材料からなる全周シール部を設け、該シール部を容器及び蓋の少なくとも一方の対応部分に一体成形してシールと成すことにより解決される。即ち、シール部は一体成形された全周シール部からなり、このシール部は容器に蓋が装着されたときには容器と蓋との間に緊密に着座し、しかも蓋及び／又は容器よりも大なる弾性の材料、特にラバー材からなるものである。このように、シール部は本発明によるスナップ蓋付き容器を構成する容器及び蓋の少なくとも一方に一体成形されている。この場合、手作業で挿入されるシールにつきものの許容誤差は排除され、また、蓋或いは容器に対するシール部の固定も、例えば容器の落下など、外部の力を受けた場合であっても、シール部が常に不動状態を維持して部材に定置されているようにすることができる。シール部は、射出成形法のような射出法により一体成形することが好ましく、それによって例えば継目などの形成も排除される。シール部の成形に際しては、蓋又は容器の関連部分の成形直後に同一成形型内に上記弾性材料を射出することができ、それにより特に製造公差と嵌合公差を小さくすることができる。
【０００５】
シール部は有利には蓋に一体成形され、その場合、シール部の幅は容器上部周縁部の厚さよりも例えば約１．５〜３倍程度厚くすることができるが、本発明はこれに限定されるものではない。シール部は本質的に水平に延在するシール領域を持つことができ、このシール領域は例えばＵ字状又はＶ字状などの断面形状とすることもできる。シール領域は単一であってもよく、或いは線状又は面状のシール接触幅や材料厚み或いは材質特性の異なる二つ以上の別個のシール領域を形成していてもよい。これら複数のシール領域は、相互に結合及び／又は径方向乃至軸方向で相互に分割されていてもよい。
【０００６】
シール部は、容器上部周縁に対面して開口している蓋の周縁溝内に配置することが好ましく、この場合、シール部は上記周縁溝内の全幅に亘って拡がっていてもよく、それにより横方向のずれに対して付加的な固定作用を得るようにしてもよい。周縁溝の両側の内側面によって、好ましくは僅かな横方向の遊びを形成もしくは形成せずに容器頂縁の内外両側面を囲むことができるが、本発明はこれに限定されるものではない。
【０００７】
シール部は、異なる角度で容器頂縁領域と緊密に接触するように互いに異なる向きに延在する二つのシール領域を有することが好ましい。この目的で、シール部は特にＵ字状、Ｖ字状又はＬ字状の断面形状、或いはその他の例えばシールすべき部分が凸部であっても各シール領域がそれぞれ対面シールを形成できるような断面形状を持つことができる。これら異なる向きのシール領域は単一部分として構成できるほか、複数部分、即ち非連続的な設計構造として構成することもでき、これらの単一又は複数のシール領域の各々または好ましくは全てが、容器及び／又は蓋と一体成形されたシールセグメントとして構成される。
【０００８】
蓋を装着して容器を閉じた際に、シール部は、容器上部周縁の頂縁と緊密に接触するほぼ水平なシール領域と、容器頂縁よりも径方向内側位置で好ましくは容器内部へ向かって下向き傾斜で延在して容器頂縁の内周面と緊密に接触する傾斜シール領域とを有することが好ましい。傾斜シール領域は容器が直立した状態でほぼ縦向きで僅かに傾斜し、二つのシール領域間の角度は９０°〜１３５°以上に及ぶ範囲とすることができる。傾斜シール領域は傾斜領域内で終端し、好ましくはほぼ直線状に延在する。傾斜シール領域の長さは水平シール領域の長さとほぼ同等とすることができ、例えばシール領域全長の１／４以上とすることができる。同様に、容器上部周縁部も、水平なシール領域と、縦向き傾斜シール領域を位置決めするための径方向内側のベベル又は面取り部とを有することが好ましいが、勿論、他の設計構造も可能である。結果的に、たとえシール領域に横向きに作用する力であっても柔軟なシールによって常に吸収されるので高い漏洩防止性能を保証することができる。
【０００９】
シール部は、容器の一部の領域、特に容器上部周縁部と緊密に接するように容器頂縁へ向かって突出した一つ又は複数の全周シールリブを有していてもよい。このシールリブの高さは、容器の壁厚よりも小さくすることができる。容器頂縁は平面でもよく、或いは一つ又は複数の全周リブを有していてもよいが、これらの全周リブは、対構成で蓋側の一つ又は複数のシールリブと少なくとも部分的に係合可能な全周溝を形成していてもよい。シールリブをシールの異なる領域、例えば水平及び／又は縦向き傾斜領域に設けることも可能である。シールリブの断面形状は、充分なシール効果が得られる限り容器頂縁の全周溝と一致している必要はない。容器頂縁の全周溝の断面形状は、シールリブの断面形状と同等又はそれより小形に構成可能であり、これにより蓋が適正に装着された際に柔軟なシールリブによって全周溝が完全に塞がれるようになる。また、全周溝の断面形状は嵌合するシールリブの断面形状よりも大形に構成することもでき、この場合、全周溝の周囲のウエブ部がシールリブの横方向の相対移動を防止する働きをする。このウエブ部は全周溝を画定する縁部にあり、シール部と緊密に接する。容器頂縁には必要に応じて一つ以上の全周リブを設け、上記目的のために柔軟なシール側に設けた溝部と係合させるようにしてもよい。特に、シール部と容器頂縁との接触部分の構造は合致もしくは相補的でない形状とすることができ、それによってシール側のリブが容器頂縁側の対向溝部に嵌入しなくなる。却ってこれで容器頂縁側のリブの例えば側面部にシール部のリブが緊密に接触することになる。この結果、信頼性のある高い漏洩防止性能のシール作用を確実にする不整合型相互嵌合が達成される。この場合、シールリブの高さは容器の壁厚より小さいことが好ましく、例えば容器壁厚の１／２〜１／５、或いはそれ以下とすることができるが、本発明はこれに限定されるものではない。
【００１０】
また容器頂縁には、シール部の平面領域と接触して容器をシールする少なくとも一つのリブを設けることもできる。このリブは、蓋が装着された際に少なくとも部分的に、又はほぼ完全に、シール部に嵌入する程度の高さとすることが好ましく、この場合、シール部は容器を構成する材料よりも大なる弾性を有していることは述べるまでもない。
【００１１】
シール部は、容器又は蓋のシール領域に力が加えられると同時に変形領域として機能可能な高さ又は厚みを有していることが好ましく、それにより何らかの力が加えられた場合にシール部よりも硬い蓋及び容器の部分的な変形を回避することができる。
【００１２】
蓋を装着した際に容器をシールするために、シール部の水平シール領域及び／又は縦向き傾斜シール領域は、容器又は蓋の対応接触領域の一部の表面、好ましくは全表面（即ち径方向の拡がり全体）と面接触するようにしておくことが可能である。
【００１３】
容器頂縁に隣接する容器外周面部分には、その外向きに下方へ向かって傾斜する外周面部分で径方向外向きに突出する複数のリブを一体成形してもよく、これらのリブは、径方向寸法が容器壁厚よりも小さな全周リブとして構成することができる。これらのリブは容器外周面と同一材料で構成可能であり、実質的には蓋を押し込む際の摩擦を軽減するのに寄与し、その場合、柔軟且つ圧縮可能なシールによる主なシール機能を補完する二次的なシール機能も発揮する。容器の外周縁には、このような全周リブを二つ以上設けることも可能である。蓋が適正な装着位置にあるときには、これら全周リブは遊び及び過大な圧縮応力の作用無しに蓋と接することが望ましく、それにより蓋が正確にシール位置に嵌合することになるが、場合によっては僅かな遊びを介して蓋から離れていてもよく、本発明はこれらに限定されるものではない。
【００１４】
本発明の好適な実施形態によれば、シール領域を安定させるために、容器の頂縁に対面するスナップ要素側の容器頂縁、好ましくは外周面に、径方向外向きに突出した補強リブが一体成形されている。この補強リブは、容器外周面を全周で囲むように延在し、一体的に連続していることが好ましいが、幾つかの補強リブセグメントに分割されていてもよい。これに代えて、或いはこれに加えて、一つ又は複数の付加的補強リブを容器頂縁と対面するスナップ要素側又はその反対側に一体成形してもよい。補強リブの厚さ、即ち高さ及び／又は幅は、容器壁厚の半分程度でよく、場合によっては壁厚と同等或いはそれ以上とすることも可能である。柔軟なシール部に隣接して補強リブを配置することにより、容器のシール領域が特に安定化される。蓋は、圧縮応力の存在又は非存在下で補強リブの径方向外側部分に接することが好ましく、それにより蓋の側面に作用する力が補強リブに直接吸収されるようになる。この目的で補強リブの径方向外側部分を平面部として構成してもよい。補強リブとスナップ要素との間の空間は、蓋のスナップ縁を収容するように構成することができる。補強リブは、必要に応じて容器の内側に設けることもできる。
【００１５】
蓋のスナップ係合は、既に一回開かれた容器に対しても変わらず有効であることが好ましく、換言すればスナップ領域とシール領域とが例えば不正開封防止シールとして機能する薄手の材料で分断されることなく、蓋部分が容器を開けるために部分的又は完全に取り外されるか折り畳まれるようになっていることが有利である。スナップ要素は容器の頂縁に直接設けるか、例えば外向きに突出する縁部の表面など、頂縁から離れた位置に設けることができる。
【００１６】
蓋を装着するためのスナップ要素は容器外周面に設けることが好ましいが、場合によっては容器内側に設けることもできる。
【００１７】
蓋の周縁には好ましくはほぼ縦向き断面部分の上に外向きのスライド傾斜面を有することが好ましく、該傾斜面は、蓋の頂縁又はその下部に接合しておくことが好ましい。スライド傾斜面は、容器外周面のスナップ要素に設けられた周方向の補強リブの直上に、或いはそこから若干離れた位置に配置することができる。スライド傾斜面は、外側で蓋のスナップ縁と径方向に面一とすることも可能であり、スナップ縁を超えて張り出すことも可能であるが、容器壁部から突出している領域を超えて径方向外側へ張り出していることが好ましい。
【００１８】
容器上部周縁部は、径方向外向きで下向きに突出する全周カラー部を有していることが好ましく、このカラー部にスナップ要素が一体成形される。この場合、スナップ要素の上方に一体成形された外向きの補強リブは、容器側の全周カラー部上に（この場合はカラー部も補強することができる）及び／又は容器外周面の全周カラー部よりも上方部分に一体成形することができる。全周カラー部が容器外周面から離れて下向きに延在していることにより、スナップ要素の領域はシール部に作用する力から隔離されていることになる。
【００１９】
下向きの全周カラー部は、容器の頂縁、即ちシール部の高さレベル或いは壁厚の数倍（例えば１〜２倍）だけ離れた箇所で接合されていることが好ましいが、本発明はこれに限定されるものではない。
【００２０】
容器の上部周縁部には、径方向外方へ張り出して下向きに延在する全周カラー部が設けられていることが好ましく、この全周カラー部は容器上に装着されている状態の蓋の直下部に位置し、蓋の周縁まで或いは蓋の周縁を超えて径方向外側へ張り出している。この全周カラー部は容器の壁部に別途一体成形可能であり、この場合、蓋のスナップ縁に対して全周カラー部の底縁が面一とされ、或いは高さ方向に離れた構成とされる。この全周カラー部は、スナップ要素を内包する延長カラー部分、即ち下向きに外方へ連続する肩部として構成するとよい。この部分に対応する不正開封防止タブ又は貼付シールを配置することができる。蓋の底縁は、圧縮応力の存在又は非存在下で全周カラー部上に当接し、或いはカラー部に対して僅かな遊びをもって接し、好ましくは蓋の底縁を手で触れることができないようになっている。この全周カラー部は、蓋の底縁を部分的又は完全に内包するように放射状のくびれ部を含んでいてもよい。
【００２１】
一つ又は複数の全周カラー部を縦向きのリブによって補強してもよく、また補強リブをカラー部の内側に設けて容器外周面に接合してもよい。補強リブは底部に凹部又はノッチを有することが好ましく、この凹部又はノッチによりカラー部が或る程度の可撓性を保持し、変形領域として機能することが可能となる。
【００２２】
蓋には、蓋を容器に装着したときに柔軟なシール部から縦方向及び／又は径方向に離れた部分に容器内周面と緊密に接する環状シール部を設けることが好ましい。この部分におけるシール構造は蓋と同一材料で構成可能である。即ち、この場合のシール構造としては、環状シール部を蓋の下面から一体的に下方へ延在する環状突リブとして構成し、或いはまた蓋下面側の環状肩部として構成することも可能であり、これら環状シール部を蓋が適正に装着された状態にあるときに容器内周壁の段部上方に位置させて密着させるようにすることが好ましい。いずれにせよシール構造を形成する環状シール部は蓋が適正に装着されている状態で容器内周面の段部に緊密に接触すればよく、場合によっては別の容器が上に積み上げられるなど、何らかの外部の力が加わった状態で環状突リブ下縁又は環状肩部下縁が容器側の段部に載るように段部から離れていてもよい。この場合、蓋側の環状部は好ましくはほぼ縦向きの容器側の段部と直線的に、即ち縦方向の高さ領域に亘って緊密に接触可能であり、この接触部位は、好ましくは補強リブ又は容器外周面側に位置する蓋のスナップ縁の下縁高さとほぼ一致するようにする。
【００２３】
容器のシールの信頼性を高めるために、蓋の内面側に一体成形された環状突リブよりも径方向内側の位置で該環状突リブの下端縁よりも上方へ突出する対向環状立上部を容器内周面に設けることができる。この対向環状立上部は全周に分散するように分割された複数の突部として設けてもよが、全周に亘って連続する全周リブとして構成することが好ましい。この対向環状立上部は蓋裏面の環状突リブが内側へずれるのを防止するのに有効であり、上記立上部の高さは容器の壁厚又は蓋側の環状突リブの厚さよりも小さいことが好ましいが、本発明はこれに限定されるものではない。対向環状立上部の上向きに突出する部分は、圧縮応力の存在又は非存在下で蓋側の環状突リブの側面と接するか、或いは僅かに離れている。この場合、蓋側の環状突リブもその内外両周面で径方向に隣接する容器側の環状突部間に圧力嵌めにより位置することができる。
【００２４】
蓋側の環状突リブ又は環状肩部の下方に位置する容器内周面の段部は、ほぼスナップ要素又は補強リブの高さレベル、或いは容器壁厚の１〜数倍の間隔を空けた位置に配置可能である。
【００２５】
シール部を安定化するために、容器内周面よりも径方向内側位置において蓋の頂面側に少なくとも一つの径方向内向きの***部を一体成形してもよい。この一つ又は複数の***部は、環状、箱状（例えば立方体又は角柱状）又はリブ状とすることができるが、本発明はこれに限定されるものではない。箱状又は環状の***部の安定化を図るため、内側に補強リブを設けてもよい。
【００２６】
***部の頂部は、容器内周面と密に接する蓋の環状シール部から縦方向、好ましくは上方へ離れた位置にあることが好ましく、縦方向の接点は実質的に点状又は線状とすることができる。***部の断面形状は非対称三角形又は矩形状に構成可能であり、***部の両側壁の頂縁及び／又は底縁は容器内側に向かって下向きに傾斜するよう構成することができる。***部の径方向内側の端壁は縦向きに傾斜するよう構成可能である。これらの***部は、蓋の頂面側に一体成形可能である。***部の頂縁は、蓋の頂縁よりも下方に位置し、別の肩部を形成するようにすることが好ましい。この構成により、例えば成形時の収縮過程に起因して材料に応力又は変形を引き起こす可能性のある容器内側のシール部位の高さレベルに***部を一体成形する必要性が排除される。
【００２７】
蓋の中央主軸に対面するこれらの***部は、全周シールリブを備えて縦方向に延在する接合面の大部分又は全部が、例えば***部、即ちリブ状の***部の側面としてシール領域内に入らないように設計することが有利である。この目的で、全周の比較的大きな部分に亘って部分的に***する***部、或いは好ましくは蓋の内面側で周方向に延在する周縁部を形成する***部などを設けておくことが好ましい。この場合、***部の両側面は、その頂部側の全周シール領域から径方向に離れた位置に配置でき、それによって蓋を下側（裏面側）から見たときに例えばほぼ台形状又は三角形状の断面形状で内側に一層広い領域を持つ全周溝を形成することができる。これらの***部、特に環状の全周***部は内側リブによって補強することもでき、この場合の補強リブは、容器内周面と接しているシール又はその支持リブから径方向に離れた位置で終結させるか、このリブのシール領域から離れた位置で容器内周面に当接させておくことが好ましい。
【００２８】
この場合、***部の頂部は蓋の内周縁とほぼ水平に、好ましくは容器内側に向かって１５°未満の下降傾斜角、例えば５°の下降傾斜角で接触させることが望ましい。
【００２９】
容器開口部を閉鎖する側の蓋の裏面は、内側のシール領域と同等レベル、或いはそれより下方のレベル、好ましくは蓋のスナップ縁と同等又はそれより下方のレベルに位置させるとよい。
【００３０】
蓋には注出口を設けることも可能であり、この注出口は容器を傾けて内容物の液体を注ぐ際に実用的な操作性が得られるように蓋表面部分の直径の約１／４の箇所に配置することが好ましい。
【００３１】
本発明の実施形態を添付図面に基づいて説明すれば以下の通りである。
【００３２】
図１は、蓋２をスナップ止めしたプラスチック射出成形円筒容器１の要部を示しており、容器外周壁３の頂縁４には平面領域が設けられている。頂縁４には径方向外方に突出した全周カラー部５が接合されており、このカラー部５にはスナップ要素として外向きに突出したスナップ縁６が一体成形され、該スナップ縁６には蓋側のスナップ要素としての掛止突起付き全周スナップ縁７が下方から係合している。蓋側及び容器側の相互にスナップ係合する面は径方向外側の周縁に丸みを持たせずにほぼ水平面となるように構成されており、それによって最終的にインターロック掛止効果が働いて特に安定したスナップ係合が果たされるようになっている。尚、容器及び蓋の各スナップ縁は、インターロック掛止効果を増すために下向きに外方へ傾斜させても差し支えない。
【００３３】
容器頂縁４に接する部分の蓋２の構造は凹部又は溝形状に構成されており、この場合、蓋側の全周溝３４の外周側の内側面８は、容器側の上下に二カ所に分離形成された全周リブ９の外側面と接している。これら各リブ９の径方向の突出長は容器の壁厚よりも充分に小さく、本実施例では容器壁厚の約１／３である。リブ９の頂縁が面取りされており、しかもリブ幅が小さいので、容器の上部周縁部に対して蓋を極めて緊密に嵌着する場合でも蓋の嵌め込みは容易である。尚、リブ９はシール領域１２の高さレベルに位置しているが、この高さレベルは、これらリブが存在しない場合でも圧縮応力を殆ど或いは実質的に全く与えることなく蓋を容器外周壁に装着することができる部分である。
【００３４】
弾性で圧縮性を有するゴム材料からなるシール部１１は、蓋の溝内の水平内底面上で内周側の内側面１０に径方向で隣接した位置に単一部材として射出成形されている。材料間の接合性を良くするため、溝の内底面及びそれに接するゴムシールの接触面は互いに噛み合う凹凸形状を有している。溝の内周側内側面１０と接するシール領域１２は縦方向に傾斜して延在し、この傾斜角は本実施例では約２０°であるが、５〜４５°の範囲内の値としてもよく、いずれにせよ本発明はこれに限定されるものではない。容器に蓋がスナップ止めされている状態では、シール１１の傾斜シール領域１２は容器側の下向きに傾斜したベベル１３上に面接触している。尚、このベベル面は容器頂縁４の内周縁に隣接（図２、３参照）し、その傾斜角は傾斜シール領域１２の接触面の傾斜角に対応しているが、本発明はこれに限定されるものではない。このようなシール部の構成により、容器上部周縁部に大きな力が作用する場合でも容器を確実に密閉することができる。シール部の外周部を囲む部分の蓋の断面構造も傾斜形状である。
【００３５】
容器の全周カラー部５はほぼ頂縁４の高さレベルで一体に接合されており、カラー部５によって頂縁４の近傍、即ち壁厚程度の空間を残す位置までキャビティ１４が形成されている。これにより、容器頂縁４の部分も全周で逆Ｕ字状の断面形状となるように構成されている。
【００３６】
逆Ｕ字状の頂縁４のほぼ縦向きの外周辺は外方部分で水平面から約３０°の角度の下向き傾斜面１５に移行して段差肩部を形成している。容器のスナップ縁６はこの肩部の下方に一体成形され、これらスナップ縁と肩部との間には径方向に厚みのある全周補強リブ１６が肩部の高さレベルで一体形成され、本実施例では補強リブ１６の径方向外方の張り出し端はスナップ縁６と面一であり、その幅、即ち縦方向の厚みもスナップ縁６とほぼ同一である。補強リブ１６の底縁はスナップ縁６の底縁と同一断面形状となるように構成されており、従って蓋側のスナップ縁７は容器側のスナップ縁６と補強リブ１６との間に位置する凹部にも係合可能であり、この目的で容器側のスナップ縁６の頂縁部も外方へ向かって下向きに傾斜させてある。従って完全なスナップ係合状態では、蓋の縁部は容器側のスナップ縁６と、補強リブ１６と、二つの全周リブ９の各外側縁と接し、この状態では傾斜面１５とその上に位置する蓋のスライド傾斜面１７との間に僅かな隙間が形成される。スライド傾斜面１７は、容器頂縁を覆う蓋周縁部の底縁よりも上方に配置してもよく、その場合は傾斜面１５又は容器外周部のほぼ水平な張り出し面に当接できるように傾斜面１７の基部下面側から傾斜面１５へ向かって下向きに環状リブを形成すればよい。
【００３７】
全周カラー部５は、スナップ縁７の下側位置で蓋２の外縁を超えてスナップ縁７よりも外方へ突出する全周肩部１８を有し、本実施例ではスナップ縁７が圧縮応力の作用の下に肩部１８と当接できるようになっているが、スナップ縁７と肩部１８との間に隙間が形成されるようにしてもよい。肩部１８は不正開封防止タブ１９を有しており、この防止タブを取り除いた後にスナップ縁７を下側から手で掴んで蓋を剥ぎ取ることができるようになっている。このタブは、比較的広い扇形範囲に亘って容器外周部に一箇所又は複数箇所隣接配置してもよい。また、必要があれば更に不正開封防止貼付シールをスナップ縁７に貼付してもよい。ここで、軟質シール部１１を収容する溝３４とスナップ縁７との間の蓋構造は極端な薄肉部が存在しないようにし、それによりスナップ係合部と容器１の内側に位置するシール部１１等の蓋部分との間に高い安定性、従って高い漏洩防止性能を保証するようにすることが重要である。
【００３８】
蓋２には、シール部１１よりも容器内側の位置に環状シール突リブ２０が一体成形されており、この環状シール突リブはその高さ部分の一部のみで容器の内周面と極めて緊密に接し、本実施例においては環状シール突リブの底端縁がほぼ補強リブ１６とスナップ縁６の間の高さに位置して全周シールを形成している。環状シール突リブ２０はほぼ縦向き下方へ突き出しており、その底端縁は容器内周面の内向き突出肩部２１の高さよりも縦方向上方へ僅かに離れている。例えば蓋に対して僅かな圧力が縦方向下向きに作用すると、環状シール突リブ２０は肩部２１上に着座する。環状シール突リブのシール機能が無くてもよい場合は、代わりに独立した下向きの環状突部を設ておくだけでもよい。肩部２１の内周縁は全周に延在する対向環状立上部２２によって画定されているが、この部分を独立した複数の突起の配列で構成することも可能であり、いずれにせよ立上部２２は環状シール突リブ２０の底端縁よりも上方位置まで延在して環状シール突リブ２０が容器内側へずれるのを防止する。また、環状シール突リブ２０を立上部２２とそれに隣接する容器内周面との間に圧力嵌めで収容するようにしてもよい。環状シール突リブ２０のシール部分は、容器から蓋が取り外された際に突リブ２０が基部から底端縁へ向かって僅かに外側へ拡がり（図２参照）、その底端縁３５が容器内周面よりも若干径方向外側になるような寸法形状に定められている。本実施例の場合、底端縁の厚みは突リブの厚さとほぼ同等であるが、好ましくは突リブの厚さの１／４以上とし、僅かに厚みに先細テーパー形状を持たせるとよい。このようにして、容器内周面に対して径方向の圧縮応力を伴う突リブの接触が蓋装着状態において常に維持される。本実施例において、蓋が取り外された際の突リブ底端縁の拡径は突リブの厚さよりも小さく、底端縁の厚みの約１／４程度である。
【００３９】
環状シール突リブ２０には、蓋中心部へ向かって僅かに下方へ傾斜した内周縁端面２３が該突リブのシール部分よりも上方位置で一体成形されており、この内周縁端面２３には、複数の内向き傾斜面２４、或いは所々に幅広の縁を持つほぼ縦向きの複数の***壁２５がセグメントとして一体成形され、これらはいずれも水平な蓋中央部２６へ一体に移行している。蓋中央部２６はスナップ縁６より下方位置にくるように形成されており、その直径は図示のように別の同様の容器を積み重ねることができるように定められている。このようにして、本実施例では断面三角形の複数の***部が容器底部へ向かって開放している台形凹部と共に一体成形されている。
【００４０】
容器の外周壁３は、蓋を外した容器の内側に別の同様の容器を重ねたり、或いは重ねた容器における力の伝達を良好にするために、３°未満、好ましくは２°未満のテーパー、即ち底部へ向かって細くなる傾斜角を有しているが、それより小さな傾斜角とすることも可能である。一方、蓋を装着した容器同士を積み重ねる際に生じる力を周縁部で良好に吸収できるように、容器中心に向いた各***壁２５の表面と、それに対面する積重ね容器の外面２７との間の間隙も、極く僅かな遊びを残すように例えば２ｍｍ未満、好ましくは１ｍｍ未満に設計される。
【００４１】
図２及び図３に拡大して示すように、容器周縁の頂縁４には二つの全周リブ３６が設けられており、これらの全周リブはシール部１１の下面に形成されている全周凹凸形状部と全周で接し、シール部の凹凸形状部の下向きに突出している全周リブ３７の幾つかは容器頂縁の全周リブ３６に対して例えばそれらの側面部で接して全周リブ３７の横方向のずれを防止し、また幾つかはリブ間に形成された溝部においてリブ３６と隣接して接し、更に幾つかは容器頂縁４の全周リブの外側面と接することになる。このように、あえて互いに整合しない二部分のリブ凹凸形状により容器の漏洩防止性が飛躍的に向上する。
【００４２】
更に、図示されているようにキャビティ１４内において容器外周壁には直角に配列された複数の縦向き補強リブ３８が一体形成されており、これらの補強リブは底部へ向かって開いている凹部３３を有し、この凹部の頂端部は容器外周壁寄りに位置している。
【００４３】
図４に示すように、容器外周壁３よりも内側の位置において蓋に設けられている内周縁傾斜端面２３は径方向寸法が異なる複数のセグメント２８及び２９を備えており、これらの***部及び凹部の配列により環状シール突リブ２０又はシール部１１のシール部分に印加される無用の力を吸収するための効果的な補強構造を達成している。本実施例によれば、セグメント２８及び２９の周方向の寸法はそれらの径方向寸法の倍数である。従ってこれらセグメントによる内向き***部は箱状となっている。各傾斜面２４及び***壁２５は、それぞれ容器の主軸から均等な距離で終結しており、両側で傾斜面２４を画定している側面３０は蓋の周縁部へ向かって傾斜している。蓋の中央部２６には、容器径の約１／４に相当する位置に閉鎖可能な注出口も設けられている。
【００４４】
図５に示す積み重ね状態では、蓋のスナップ縁７の底端縁はスライド傾斜面１７上に載っており、環状シール突リブ２０の底端縁３５はシール部１１を保持している溝３４の水平な底部３１の外面上に載っている。これに代えて、或いは付加的に、箱状の***部の底縁部３２を下の蓋の***部の頂縁の上に載せるようにしてもよい。
【図面の簡単な説明】
【図１】 別の容器を上に積み重ねた状態にある本発明による蓋付き容器の要部を示す部分断面図である。
【図２】 図１による蓋付き容器の要部の詳細を示す部分断面図である。
【図３】 図１による容器の要部の詳細を示す部分断面図である。
【図４】 図１による蓋付き容器の平面図である。
【図５】 図１による容器の蓋を積み重ねた状態の要部を示す模式部分断面図である。
【符号の説明】
１：円筒容器
２：蓋
３：外周壁
４：頂縁
５：カラー部
６，７：スナップ縁
８：外周側内側面
９：リブ
１０：側面
１１：シール部
１１ａ：シールリブ
１２：縦向きシール領域
１３：ベベル面
１４：キャビティ
１５：傾斜面
１６：補強リブ
１７：スライド傾斜面
１８：肩部
１９：不正開封防止タグ
２０：環状シール突リブ
２１：肩部
２２：対向環状立上部
２３，２４：傾斜面
２５：***壁
２６：蓋中央部
２７：容器外周壁
２８，２９：セグメント
３０：側面
３１：水平底部
３２：底縁部
３３：凹部
３４：周縁溝
３５：底端縁
３６，３７，３８：リブ[0001]
The present invention comprises a snap lid and a snap element provided at the upper peripheral edge of the container for snapping the lid, and a portion that comes into close contact with the upper peripheral edge of the container when the lid is snapped to the container And a plastic container in which this part of the lid and the upper peripheral edge of the container form a seal in intimate contact.
[0002]
This type of plastic container is used to transport a variety of goods, and has proved to be extremely effective for transportation purposes, particularly in the industrial and food related sectors. However, there still remains a problem with the sufficient leakage prevention performance of plastic containers for the transport of liquids or low viscosity materials. This is especially a problem when transporting volatile and other critical materials such as oils, especially mineral oils. Although various efforts have been made to achieve sufficient leakage prevention performance for plastic containers used for transporting these substances by providing a corresponding shape for the upper peripheral edge of the container and the lid, the known plastic containers are sufficient. High leakage prevention performance that cannot be performed is essential.
German Offenlegungsschrift 4,422,534 discloses a totally injection molded single edge plastic container with a snap lid, in which the lid is inserted into the opening of the container by mounting the lid. In contact with the inner surface, the peripheral edge of the lid is in close contact with the peripheral wall of the container inside.
[0003]
The objective of this invention is providing the plastic container with a snap lid which can satisfy | fill the above-mentioned special request | requirement imposed on the leakage prevention performance with high reliability.
[0004]
According to the plastic container with a snap lid according to the present invention, the entire periphery seal portion made of a material having elasticity larger than that of the container and the lid is provided as a seal portion between the container and the lid, and the seal portion is The problem is solved by integrally forming at least one corresponding part of the container and the lid to form a seal. That is, the seal portion is formed of an integrally formed all-around seal portion, and this seal portion sits tightly between the container and the lid when the lid is attached to the container, and is larger than the lid and / or the container. It is made of an elastic material, particularly a rubber material. As described above, the seal portion is integrally formed with at least one of the container and the lid constituting the container with the snap lid according to the present invention. In this case, tolerances associated with manually inserted seals are eliminated, and even if the seal part is fixed to the lid or container, even if it receives an external force, such as dropping the container, the seal part Can always be fixed and fixed on the member. The seal portion is preferably integrally molded by an injection method such as an injection molding method, thereby eliminating the formation of, for example, a seam. In forming the seal portion, the elastic material can be injected into the same mold immediately after forming the lid or the related portion of the container, and in particular, manufacturing tolerances and fitting tolerances can be reduced.
[0005]
The sealing part is advantageously formed integrally with the lid, in which case the width of the sealing part can be made, for example, about 1.5 to 3 times thicker than the thickness of the peripheral edge of the upper part of the container, but the invention is not limited to this. Is not to be done. The seal part may have a seal region that extends essentially horizontally, and this seal region may have a cross-sectional shape such as a U-shape or a V-shape, for example. The seal region may be single, or two or more separate seal regions having different linear or planar seal contact widths, material thicknesses, or material characteristics may be formed. The plurality of seal regions may be coupled to each other and / or divided from each other in the radial direction or the axial direction.
[0006]
The seal part is preferably arranged in the peripheral groove of the lid that opens facing the upper peripheral edge of the container. In this case, the seal part may extend over the entire width of the peripheral groove, thereby You may make it acquire an additional fixing effect | action with respect to the shift | offset | difference of a horizontal direction. The inner side surfaces on both sides of the peripheral groove can surround the inner and outer side surfaces of the container top edge, preferably without forming or forming a slight lateral play, but the present invention is not limited to this.
[0007]
The sealing part preferably has two sealing regions extending in different directions so as to be in intimate contact with the container top edge region at different angles. For this purpose, the seal portion is particularly U-shaped, V-shaped or L-shaped in cross section, or other seal regions can form a face-to-face seal even if the portion to be sealed is a convex portion, for example. It can have a cross-sectional shape. These differently oriented seal areas can be configured as a single part, or can be configured as multiple parts, i.e., non-continuous design structures, each or preferably all of these single or multiple seal areas being the container and And / or configured as a seal segment integrally formed with the lid.
[0008]
When the container is closed with the lid attached, the seal portion is in a substantially horizontal seal area that is in intimate contact with the top edge of the upper peripheral edge of the container, and preferably inward of the container at a position radially inward of the top edge of the container. It is preferable to have an inclined sealing region that extends downward and inclines and is in intimate contact with the inner peripheral surface of the container top edge. The inclined sealing area may be slightly inclined in the vertical direction with the container standing upright, and the angle between the two sealing areas may range from 90 ° to 135 ° or more. The inclined sealing area terminates in the inclined area and preferably extends substantially linearly. The length of the inclined seal region can be substantially equal to the length of the horizontal seal region, and can be, for example, ¼ or more of the total length of the seal region. Similarly, the upper peripheral edge of the container also preferably has a horizontal sealing area and a radially inner bevel or chamfer for positioning the longitudinally inclined sealing area, but of course other design configurations are possible. is there. As a result, even if the force acts laterally on the seal region, it is always absorbed by the flexible seal, so that high leakage prevention performance can be ensured.
[0009]
The seal portion may have one or a plurality of circumferential seal ribs that protrude toward the top edge of the container so as to be in close contact with a partial region of the container, particularly the upper peripheral edge of the container. The height of the seal rib can be made smaller than the wall thickness of the container. The top edge of the container may be flat or may have one or more circumferential ribs, but these circumferential ribs are at least partly in combination with one or more sealing ribs on the lid side. An all-around groove that can be engaged may be formed. It is also possible to provide seal ribs in different areas of the seal, for example in horizontal and / or longitudinally inclined areas. The cross-sectional shape of the seal rib need not coincide with the entire circumferential groove on the top edge of the container as long as a sufficient sealing effect is obtained. The cross-sectional shape of the circumferential groove on the top edge of the container can be configured to be the same as or smaller than the cross-sectional shape of the sealing rib, so that the circumferential groove is completely closed by the flexible sealing rib when the lid is properly installed. It comes off. Also, the cross-sectional shape of the circumferential groove can be made larger than the cross-sectional shape of the sealing rib to be fitted, and in this case, the web portion around the circumferential groove prevents the relative movement of the sealing rib in the lateral direction. do. This web portion is at the edge that defines the circumferential groove and is in intimate contact with the seal portion. If necessary, one or more circumferential ribs may be provided on the top edge of the container and engaged with a groove provided on the flexible seal side for the above purpose. In particular, the structure of the contact portion between the seal portion and the container top edge can be a shape that is not matched or complementary, so that the rib on the seal side does not fit into the opposing groove on the container top edge side. On the other hand, the rib of the seal portion comes into close contact with, for example, the side portion of the rib on the container top edge side. As a result, a misaligned inter-fitting is achieved that ensures a reliable and leak-proof sealing action. In this case, the height of the seal rib is preferably smaller than the wall thickness of the container, and may be, for example, 1/2 to 1/5 or less of the container wall thickness, but the present invention is not limited to this. is not.
[0010]
The container top edge can also be provided with at least one rib for sealing the container in contact with the planar area of the seal. The rib is preferably at least partially or almost completely high enough to fit into the seal part when the lid is attached, in which case the seal part is larger than the material constituting the container. Needless to say, it has elasticity.
[0011]
The seal portion preferably has a height or thickness that can function as a deformation region at the same time that a force is applied to the seal region of the container or the lid, so that when some force is applied, the seal portion is more than the seal portion. Partial deformation of the hard lid and the container can be avoided.
[0012]
In order to seal the container when the lid is installed, the horizontal sealing area and / or the longitudinally inclined sealing area of the seal part is a part of the corresponding contact area of the container or the lid, preferably the entire surface (ie radial) It is possible to keep it in surface contact with the entire spread.
[0013]
A plurality of ribs protruding outward in the radial direction at the outer peripheral surface portion inclined outwardly downward may be integrally formed on the outer peripheral surface portion of the container adjacent to the container top edge. It can be configured as a circumferential rib whose radial dimension is smaller than the container wall thickness. These ribs can be made of the same material as the outer peripheral surface of the container, contributing to a substantial reduction in friction when pushing the lid, and in that case complementing the main sealing function with a flexible and compressible seal It also exhibits a secondary sealing function. Two or more such circumferential ribs can be provided on the outer peripheral edge of the container. When the lid is in the proper mounting position, these circumferential ribs should contact the lid without play and excessive compressive stress effects, so that the lid will fit correctly into the sealing position. May be separated from the lid by a slight play, and the present invention is not limited to these.
[0014]
According to a preferred embodiment of the present invention, in order to stabilize the sealing region, a reinforcing rib projecting radially outward is provided on the container top edge, preferably the outer peripheral surface, on the snap element side facing the top edge of the container. It is integrally molded. This reinforcing rib preferably extends so as to surround the outer peripheral surface of the container and is continuously continuous, but may be divided into several reinforcing rib segments. Alternatively or additionally, one or more additional reinforcing ribs may be integrally formed on the snap element side facing the container top edge or on the opposite side. The thickness, i.e., height and / or width, of the reinforcing ribs may be about half of the container wall thickness, and in some cases may be equal to or greater than the wall thickness. By placing the reinforcing rib adjacent to the flexible seal, the sealing area of the container is particularly stabilized. The lid preferably contacts the radially outer portion of the reinforcing rib in the presence or absence of compressive stress so that forces acting on the side of the lid are directly absorbed by the reinforcing rib. For this purpose, the radially outer portion of the reinforcing rib may be configured as a flat portion. The space between the reinforcing rib and the snap element can be configured to accommodate the snap edge of the lid. The reinforcing rib can be provided inside the container as necessary.
[0015]
The snap engagement of the lid is preferably effective even for a container that has already been opened once. In other words, the snap area and the seal area are separated by a thin material that functions as, for example, a tamper-evident seal. Without being advantageous, it is advantageous for the lid part to be partly or completely removed or folded to open the container. The snap element can be provided directly on the top edge of the container or at a position away from the top edge, for example the surface of the edge protruding outward.
[0016]
The snap element for mounting the lid is preferably provided on the outer peripheral surface of the container, but may be provided on the inner side of the container in some cases.
[0017]
The periphery of the lid preferably has an outward slide inclined surface on a substantially longitudinal section, and the inclined surface is preferably joined to the top edge of the lid or its lower part. The slide inclined surface can be arranged directly above the circumferential reinforcing rib provided on the snap element on the outer peripheral surface of the container or at a position slightly away from the circumferential reinforcing rib. The inclined slide surface can be flush with the snap edge of the lid on the outside and can extend beyond the snap edge, but beyond the region protruding from the container wall. It is preferable to project outward in the radial direction.
[0018]
The upper peripheral portion of the container preferably has an outer peripheral collar portion that protrudes radially outward and downward, and a snap element is integrally formed on the collar portion. In this case, the outward reinforcing ribs integrally formed above the snap element are formed on the entire collar portion on the container side (in this case, the collar portion can also be reinforced) and / or the entire circumference of the outer peripheral surface of the container. It can be integrally formed in the upper part of the collar part. Since the entire peripheral collar portion extends downward from the outer peripheral surface of the container, the region of the snap element is isolated from the force acting on the seal portion.
[0019]
Although the downward all-around collar portion is preferably joined at the top edge of the container, that is, at a location separated by several times (for example, 1 to 2 times) the height level or wall thickness of the seal portion, It is not limited to this.
[0020]
The upper peripheral edge of the container is preferably provided with an all-around collar portion that projects outwardly in the radial direction and extends downward, and this all-around collar portion is a lid that is mounted on the container. It is located directly below and projects outward in the radial direction up to or beyond the periphery of the lid. This all-around collar part can be separately integrally formed on the wall part of the container. In this case, the bottom edge of the all-around collar part is flush with the snap edge of the lid, or is separated in the height direction. Is done. The all-around collar portion may be configured as an extended collar portion containing the snap element, that is, a shoulder portion that continues downward and outward. A tamper-evident tab or a sticker seal corresponding to this part can be arranged. The bottom edge of the lid abuts on the entire collar portion in the presence or absence of compressive stress, or a slight play against the collar portion, preferably so that the bottom edge of the lid cannot be touched by hand. It has become. The all-around collar portion may include a radial constriction so as to partially or completely enclose the bottom edge of the lid.
[0021]
One or a plurality of all-around collar portions may be reinforced by vertical ribs, or reinforcing ribs may be provided inside the collar portions and joined to the outer peripheral surface of the container. The reinforcing rib preferably has a recess or notch at the bottom, and the recess or notch allows the collar portion to retain a certain degree of flexibility and function as a deformation region.
[0022]
The lid is preferably provided with an annular seal portion that is in close contact with the inner peripheral surface of the container at a portion separated from the flexible seal portion in the longitudinal direction and / or the radial direction when the lid is attached to the container. The seal structure in this part can be made of the same material as the lid. That is, as the seal structure in this case, it is possible to configure the annular seal portion as an annular projecting rib that integrally extends downward from the lower surface of the lid, or as an annular shoulder portion on the lower surface side of the lid. It is preferable that these annular seal portions be positioned and adhered to the upper portion of the step on the inner peripheral wall of the container when the lid is properly attached. In any case, the annular seal part that forms the seal structure may be in close contact with the stepped portion of the inner peripheral surface of the container with the lid properly attached, and in some cases, another container is stacked on top, The annular projecting rib lower edge or the annular shoulder lower edge may be separated from the step portion so that the outer edge of the annular projecting rib is placed on the step portion on the container side in a state where some external force is applied. In this case, the annular part on the lid side is preferably in direct contact with the step part on the side of the container in the vertical direction, i.e. over the height region in the vertical direction, and this contact part is preferably reinforced. It is made to correspond with the lower edge height of the snap edge of the lid located on the rib or container outer peripheral surface side.
[0023]
In order to increase the reliability of the seal of the container, the container is provided with an opposed annular upright portion that protrudes upward from the lower end edge of the annular projecting rib at a position radially inward of the annular projecting rib integrally formed on the inner surface side of the lid. It can be provided on the inner peripheral surface. The opposed annular uprights may be provided as a plurality of protrusions divided so as to be distributed over the entire circumference, but are preferably configured as all-around ribs extending over the entire circumference. This opposed annular upright is effective in preventing the annular projecting rib on the back of the lid from shifting inward, and the height of the upright is less than the wall thickness of the container or the thickness of the annular projecting rib on the lid side. However, the present invention is not limited to this. The upward projecting portion of the opposed annular ridge is in contact with or slightly away from the side of the lid-side annular projecting rib in the presence or absence of compressive stress. In this case, the lid-side annular projecting ribs can also be located by pressure fitting between the container-side annular projecting portions radially adjacent to each other on the inner and outer peripheral surfaces thereof.
[0024]
The step on the inner peripheral surface of the container located below the ring-shaped protruding rib or the shoulder on the lid side is located at a height level of the snap element or the reinforcing rib, or at a distance of 1 to several times the container wall thickness. Can be arranged.
[0025]
In order to stabilize the seal portion, at least one radially inwardly raised portion may be integrally formed on the top surface side of the lid at a position radially inward from the inner peripheral surface of the container. The one or more raised portions may be annular, box-like (for example, cubic or prismatic) or rib-like, but the present invention is not limited to this. In order to stabilize the box-shaped or annular ridges, reinforcing ribs may be provided inside.
[0026]
The top of the raised portion is preferably located at a position vertically away from the annular seal portion of the lid that is in close contact with the inner peripheral surface of the container, preferably upward, and the contact in the longitudinal direction is substantially punctiform or linear. can do. The cross-sectional shape of the raised portion can be configured as an asymmetrical triangle or a rectangle, and the top edge and / or the bottom edge of both side walls of the raised portion can be configured to be inclined downward toward the inside of the container. The end wall on the radially inner side of the raised portion can be configured to be inclined in the vertical direction. These raised portions can be integrally formed on the top surface side of the lid. The top edge of the ridge is preferably located below the top edge of the lid so as to form another shoulder. This arrangement eliminates the need to integrally mold the ridges at the level of the seal site inside the container that can cause stress or deformation in the material due to, for example, the shrinking process during molding.
[0027]
These ridges facing the central spindle of the lid have a circumferential surface with ribs and most or all of the joint surfaces extending in the longitudinal direction, for example as ridges, i.e. side surfaces of rib-like ridges, in the sealing area. It is advantageous to design so that it does not enter. For this purpose, it is possible to provide a bulging portion that partially bulges over a relatively large portion of the entire circumference, or preferably a bulging portion that forms a peripheral edge extending in the circumferential direction on the inner surface side of the lid. preferable. In this case, both side surfaces of the raised portion can be arranged at positions radially away from the entire peripheral sealing region on the top side thereof, so that, for example, when the lid is viewed from the lower side (back side), for example, substantially trapezoidal or triangular A circumferential groove having a wider area on the inside can be formed with a cross-sectional shape. These ridges, in particular the annular circumferential ridges, can also be reinforced by inner ribs, in which case the reinforcement ribs are located radially away from the seal in contact with the inner circumferential surface of the container or its supporting ribs. It is preferable to terminate or to contact the inner peripheral surface of the container at a position away from the sealing region of the rib.
[0028]
In this case, it is desirable that the top of the raised portion is brought into contact with the inner peripheral edge of the lid substantially horizontally, preferably toward the inside of the container with a downward inclination angle of less than 15 °, for example, a downward inclination angle of 5 °.
[0029]
The back surface of the lid that closes the container opening may be located at a level equivalent to or below the inner sealing area, preferably at a level equivalent to or below the snap edge of the lid.
[0030]
It is also possible to provide a spout on the lid, and this spout is about 1/4 of the diameter of the lid surface portion so that practical operability can be obtained when the container is tilted to pour the liquid of the contents. It is preferable to arrange in a place.
[0031]
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0032]
FIG. 1 shows a main part of a plastic injection-molded cylindrical container 1 with a lid 2 snapped thereto, and a planar region is provided on the top edge 4 of the container outer peripheral wall 3. A collar portion 5 that protrudes outward in the radial direction is joined to the top edge 4, and a snap edge 6 that protrudes outward as a snap element is integrally formed on the collar portion 5. In this case, the entire peripheral snap edge 7 with a latching projection as a snap element on the lid side is engaged from below. The surfaces of the lid side and the container side that are snap-engaged with each other are configured so as to be substantially horizontal without rounding the outer periphery in the radial direction. In particular, stable snap engagement is achieved. It should be noted that the snap edges of the container and the lid may be inclined downward and outward in order to increase the interlock locking effect.
[0033]
The structure of the lid 2 at the portion in contact with the container top edge 4 is formed in a concave or groove shape. In this case, the inner side surface 8 on the outer circumferential side of the circumferential groove 34 on the lid side is located at two locations above and below the container side. The outer peripheral surface of the all-around rib 9 formed separately is in contact. The protruding length in the radial direction of each rib 9 is sufficiently smaller than the wall thickness of the container, and in this embodiment is about 1/3 of the container wall thickness. Since the top edge of the rib 9 is chamfered and the rib width is small, the lid can be easily fitted even when the lid is fitted very tightly to the upper peripheral edge of the container. The ribs 9 are positioned at the height level of the seal region 12, but this height level allows the lid to be placed on the outer wall of the container with little or substantially no compressive stress even in the absence of these ribs. This is the part that can be attached.
[0034]
The seal portion 11 made of an elastic and compressible rubber material is injection-molded as a single member at a position adjacent to the inner side surface 10 on the inner peripheral side in the radial direction on the horizontal inner bottom surface in the groove of the lid. In order to improve the bondability between the materials, the inner bottom surface of the groove and the contact surface of the rubber seal in contact therewith have an uneven shape that meshes with each other. The seal region 12 that is in contact with the inner peripheral side surface 10 of the groove extends while being inclined in the vertical direction, and this inclination angle is about 20 ° in this embodiment, but it may be a value within the range of 5 to 45 °. In any case, the present invention is not limited to this. In a state where the lid is snapped to the container, the inclined seal region 12 of the seal 11 is in surface contact with the bevel 13 inclined downward on the container side. The bevel surface is adjacent to the inner peripheral edge of the container top edge 4 (see FIGS. 2 and 3), and the inclination angle thereof corresponds to the inclination angle of the contact surface of the inclined seal region 12, but the present invention is not limited thereto. It is not limited. With such a configuration of the seal portion, the container can be reliably sealed even when a large force acts on the upper peripheral edge of the container. The cross-sectional structure of the lid surrounding the outer periphery of the seal portion is also inclined.
[0035]
The all-around collar portion 5 of the container is integrally joined at substantially the height level of the top edge 4, and the cavity 14 is formed by the collar portion 5 to the vicinity of the top edge 4, that is, to a position that leaves a space about the wall thickness. Yes. Thereby, the part of the container top edge 4 is also configured to have an inverted U-shaped cross-sectional shape on the entire circumference.
[0036]
A substantially vertical outer periphery of the inverted U-shaped top edge 4 is shifted to a downward inclined surface 15 at an angle of about 30 ° from the horizontal plane at the outer portion to form a stepped shoulder. The snap edge 6 of the container is integrally formed below the shoulder, and a circumferential reinforcing rib 16 having a thickness in the radial direction is integrally formed between the snap edge and the shoulder at the height of the shoulder. In this embodiment, the radially outward projecting end of the reinforcing rib 16 is flush with the snap edge 6, and the width, that is, the thickness in the vertical direction is substantially the same as the snap edge 6. The bottom edge of the reinforcing rib 16 is configured to have the same cross-sectional shape as the bottom edge of the snap edge 6. Therefore, the snap edge 7 on the lid side is located between the snap edge 6 on the container side and the reinforcing rib 16. For this purpose, the top edge of the container-side snap edge 6 is also inclined downwardly. Therefore, in the complete snap engagement state, the edge of the lid is in contact with the container side snap edge 6, the reinforcing rib 16, and the outer edges of the two circumferential ribs 9, and in this state, the inclined surface 15 and above it A slight gap is formed between the sliding inclined surface 17 of the lid. The slide inclined surface 17 may be disposed above the bottom edge of the peripheral edge of the lid that covers the top edge of the container, and in that case, the slide inclined surface 17 is inclined so as to be able to contact the inclined surface 15 or the substantially horizontal protruding surface of the outer periphery of the container. What is necessary is just to form an annular rib downward toward the inclined surface 15 from the base lower surface side of the surface 17.
[0037]
The all-around collar portion 5 has an all-around shoulder portion 18 that protrudes outward from the snap edge 7 beyond the outer edge of the lid 2 at the lower position of the snap edge 7, and in this embodiment, the snap edge 7 is compressed. Although it can come into contact with the shoulder 18 under the action of stress, a gap may be formed between the snap edge 7 and the shoulder 18. The shoulder 18 has a tamper-evident prevention tab 19, and after removing the prevention tab, the snap edge 7 can be grasped by hand from below and the lid can be peeled off. This tab may be disposed adjacent to the outer periphery of the container at one or a plurality of locations over a relatively wide sector range. Further, if necessary, an unauthorized opening preventing sticking sticker may be stuck on the snap edge 7. Here, the lid structure between the groove 34 for accommodating the soft seal portion 11 and the snap edge 7 prevents an extremely thin portion from being present, and thereby, the snap engagement portion and the seal portion 11 located inside the container 1. It is important to ensure high stability and therefore high leakage prevention performance between the lid portion and the like.
[0038]
An annular seal protrusion rib 20 is integrally formed on the lid 2 at a position inside the container relative to the seal portion 11, and this annular seal protrusion rib is very tightly connected to the inner peripheral surface of the container only at a part of the height portion. In this embodiment, the bottom end edge of the annular seal protruding rib is located at a height between the reinforcing rib 16 and the snap edge 6 to form an all-round seal. The annular seal protruding rib 20 protrudes substantially downward in the vertical direction, and the bottom end edge thereof is slightly separated upward in the vertical direction from the height of the inwardly projecting shoulder portion 21 on the inner peripheral surface of the container. For example, when a slight pressure acts on the lid downward in the vertical direction, the annular seal protrusion rib 20 is seated on the shoulder portion 21. If the sealing function of the annular seal protrusion rib is not necessary, an independent downward annular protrusion may be provided instead. The inner peripheral edge of the shoulder portion 21 is defined by an opposed annular upright portion 22 that extends around the entire circumference. However, this portion can also be constituted by an array of a plurality of independent protrusions. Extends to a position above the bottom end edge of the annular seal protrusion rib 20 to prevent the annular seal protrusion rib 20 from shifting to the inside of the container. Moreover, you may make it accommodate the annular seal protrusion rib 20 by press-fitting between the upright part 22 and the container internal peripheral surface adjacent to it. When the lid is removed from the container, the seal rib of the annular seal projecting rib 20 slightly expands outward from the base toward the bottom edge (see FIG. 2), and the bottom edge 35 is in the container. The size and shape are determined so as to be slightly outside in the radial direction from the peripheral surface. In the case of the present embodiment, the thickness of the bottom edge is substantially the same as the thickness of the protruding rib, but it is preferable that the thickness of the protruding rib is preferably ¼ or more, and the thickness is slightly tapered. In this way, the contact of the protruding rib with the radial compressive stress with respect to the inner peripheral surface of the container is always maintained in the lid mounted state. In this embodiment, the diameter of the bottom edge of the protruding rib when the lid is removed is smaller than the thickness of the protruding rib and is about 1/4 of the thickness of the bottom edge.
[0039]
The annular seal protrusion rib 20 is integrally formed with an inner peripheral edge face 23 inclined slightly downward toward the center of the lid at a position above the seal portion of the protrusion rib. A plurality of inwardly inclined surfaces 24 or a plurality of substantially vertical raised walls 25 having wide edges in some places are integrally formed as segments, all of which are integrally transferred to a horizontal lid central portion 26. The lid center part 26 is formed so as to be positioned below the snap edge 6, and its diameter is determined so that other similar containers can be stacked as shown. In this way, in this embodiment, a plurality of ridges having a triangular cross section are integrally formed with a trapezoidal recess that opens toward the bottom of the container.
[0040]
The outer peripheral wall 3 of the container has a taper of less than 3 °, preferably less than 2 °, in order to allow another similar container to be stacked inside the container with the lid removed or for better force transmission in the stacked container. That is, it has an inclination angle that narrows toward the bottom, but it is also possible to make the inclination angle smaller than that. On the other hand, between the surface of each raised wall 25 facing the center of the container and the outer surface 27 of the stacked container that faces the center of the container so that the force generated when the containers with the lids are stacked can be satisfactorily absorbed by the peripheral edge. The gap is also designed to be, for example, less than 2 mm, preferably less than 1 mm, leaving very little play.
[0041]
As shown in enlarged views in FIGS. 2 and 3, two circumferential ribs 36 are provided on the top edge 4 of the peripheral edge of the container, and these circumferential ribs are all formed on the lower surface of the seal portion 11. Some of the circumferential ribs 37 that are in contact with the circumferential concavo-convex shape portion on the entire circumference and project downwardly on the concavo-convex shape portion of the seal portion are in contact with the circumferential rib 36 on the top edge of the container, for example, on their side portions. The circumferential rib 37 is prevented from being laterally displaced, and some are adjacent to the rib 36 in the groove formed between the ribs, and some are in contact with the outer surface of the entire circumferential rib of the container top edge 4. become. In this way, the leakage prevention property of the container is greatly improved by the two-part rib unevenness shape that is not aligned with each other.
[0042]
Further, as shown in the figure, a plurality of longitudinal reinforcing ribs 38 arranged at right angles are integrally formed on the outer peripheral wall of the container in the cavity 14, and these reinforcing ribs are recessed portions 33 that open toward the bottom. The top end portion of the recess is located closer to the outer peripheral wall of the container.
[0043]
As shown in FIG. 4, the inner peripheral edge inclined end surface 23 provided on the lid at a position inside the outer peripheral wall 3 of the container includes a plurality of segments 28 and 29 having different radial dimensions. An effective reinforcing structure for absorbing unnecessary force applied to the annular seal protrusion rib 20 or the seal portion of the seal portion 11 is achieved by the arrangement of the recesses. According to this embodiment, the circumferential dimensions of the segments 28 and 29 are multiples of their radial dimensions. Therefore, the inwardly raised portions by these segments are box-shaped. Each inclined surface 24 and raised wall 25 terminate at an equal distance from the main axis of the container, and the side surfaces 30 defining the inclined surface 24 on both sides are inclined toward the peripheral edge of the lid. The central portion 26 of the lid is also provided with a spout that can be closed at a position corresponding to about 1/4 of the diameter of the container.
[0044]
In the stacked state shown in FIG. 5, the bottom end edge of the snap edge 7 of the lid rests on the slide inclined surface 17, and the bottom end edge 35 of the annular seal protrusion rib 20 is formed in the groove 34 holding the seal portion 11. It rests on the outer surface of the horizontal bottom 31. Alternatively or additionally, the bottom edge 32 of the box-like ridge may be placed on the top edge of the ridge of the lower lid.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a main part of a container with a lid according to the present invention in a state in which another container is stacked thereon.
FIG. 2 is a partial cross-sectional view showing details of a main part of the lidded container according to FIG.
FIG. 3 is a partial cross-sectional view showing details of a main part of the container according to FIG. 1;
4 is a plan view of the lidded container according to FIG. 1. FIG.
FIG. 5 is a schematic partial cross-sectional view showing a main part in a state where the container lids according to FIG. 1 are stacked.
[Explanation of symbols]
1: Cylindrical container
2: Lid
3: Outer wall
4: Top edge
5: Color part
6, 7: Snap edge
8: Outer side inner side
9: Rib
10: Side
11: Seal part
11a: Seal rib
12: Vertical seal area
13: Bevel surface
14: Cavity
15: Inclined surface
16: Reinforcement rib
17: Sliding inclined surface
18: Shoulder
19: Tamper-evident tag
20: Annular seal protrusion rib
21: Shoulder
22: Opposed annular upright
23, 24: Inclined surface
25: Raised wall
26: Center of lid
27: Container outer peripheral wall
28, 29: Segment
30: Side
31: Horizontal bottom
32: Bottom edge
33: Recess
34: peripheral groove
35: Bottom edge
36, 37, 38: Ribs

Claims (18)

スナップ蓋と、この蓋をスナップ止めするために容器上部周縁部に設けられたスナップ要素とを備え、前記蓋は、全周スナップ縁（７）と容器（１）の頂縁（４）を受け入れる周縁溝（３４）とを有すると共に容器にスナップ止めされたときに容器の上部周縁部と緊密に接して前記周縁溝（３４）内で全周シールを形成するシール部を有する射出成形プラスチック容器において、前記シール部が容器及び／又は蓋よりも大なる弾性を有する材料からなると共に射出成形によって前記蓋（２）及び／又は容器（１）に一体成形され、容器（１）の上部周縁部には外側で下方へ向かって延在する全周カラー部（５）が設けられ、該全周カラー部が前記全周シール部分の高さレベル又はそこから容器壁厚の数倍以内の箇所で容器（１）の頂縁（４）に接合され、この全周カラー部に前記スナップ要素（６）が一体成形されていることを特徴とするスナップ蓋付きプラスチック容器。A snap lid, and a snap element provided at the upper peripheral edge of the container for snapping the lid, said lid receiving the entire circumferential snap edge (7) and the top edge (4) of the container (1) in the injection-molded plastic containers having a seal portion which forms the entire periphery sealed with the peripheral groove (34) in closely with the upper periphery of the container in contact when snapped into the container and having a peripheral groove (34) The seal portion is made of a material having elasticity larger than that of the container and / or the lid, and is integrally formed with the lid (2) and / or the container (1) by injection molding, and is formed on the upper peripheral edge of the container (1). Is provided with an all-around collar portion (5) extending downward on the outside, and the all-around collar portion is disposed at a height level of the all-around seal portion or at a location within several times the container wall thickness therefrom. Top edge of (1) (4) Bonded, snap lid plastic container the snap element in the entire circumference collar (6) is characterized in that it is integrally molded. シール部が、蓋を容器にスナップ止めした状態において容器上部周縁部の頂縁及び周面と緊密に接してそれぞれ全周シールを形成する少なくとも二つの互いに異なる角度で延在するシール領域（１１，１２）を有することを特徴とする請求項１に記載の容器。Seal regions (11, 11) extending at different angles from each other , wherein the seal portion is in close contact with the top edge and the peripheral surface of the upper peripheral edge of the container in the state where the lid is snapped to the container to form an entire peripheral seal The container according to claim 1, comprising 12). シール部（１１）が容器の主軸に対して互いに異なる角度を成す二つのシール領域（１１，１２）を有すると共に、これらシール領域が互いに離れていることを特徴とする請求項１又は２に記載の容器。  3. The sealing part (11) according to claim 1 or 2, characterized in that the sealing part (11) has two sealing areas (11, 12) at different angles with respect to the main axis of the container and these sealing areas are separated from each other. Container. シール部（１１）が、容器頂縁（４）よりも径方向内側位置で容器内へ向かって下向きに傾斜した容器内周面部分に対して緊密に接触可能なシール領域（１２）を有することを特徴とする請求項１〜３のいずれか１項に記載の容器。  The seal portion (11) has a seal region (12) that can come into close contact with the inner peripheral surface of the container inclined downward toward the inside of the container at a position radially inward of the container top edge (4). The container according to any one of claims 1 to 3, wherein: シール部（１１）が、容器（１）の上部周縁部と緊密に接するように容器頂縁（４）へ向かって突出した少なくとも一つの全周シールリブ（３７）を有することを特徴とする請求項１〜４のいずれか１項に記載の容器。  The sealing part (11) has at least one circumferential seal rib (37) projecting toward the container top edge (4) so as to be in intimate contact with the upper peripheral edge of the container (1). The container of any one of 1-4. 容器（１）が、シール部（１１）に対面して該シール部（１１）に接触可能な少なくとも一つの全周リブ（３６）を備えていることを特徴とする請求項１〜５のいずれか１項に記載の容器。  The container (1) is provided with at least one circumferential rib (36) that faces the seal portion (11) and can contact the seal portion (11). The container according to claim 1. 容器（１）とシール部（１１）がそれぞれリブ状の突部（３６，３７）を備え、これら突部は、蓋（２）を装着した際に容器（１）側とシール部（１１）側の各突部（３６，３７）同士が接触状態となるように相対的に位置付けられていることを特徴とする請求項６に記載の容器。  The container (1) and the seal part (11) are each provided with rib-like protrusions (36, 37), and these protrusions are connected to the container (1) side and the seal part (11) when the lid (2) is attached. The container according to claim 6, wherein the protrusions (36, 37) on the side are relatively positioned so as to be in contact with each other. シール部（１１）を収容した前記溝（３４）とシール部（１１）との接触面同士が互いに密に噛み合う凹凸形状を有することを特徴とする請求項１〜７のいずれか１項に記載の容器。The contact surface of the said groove | channel (34 ) which accommodated the seal part (11), and the seal part (11) has the uneven | corrugated shape which meshes | engages closely mutually, The any one of Claims 1-7 characterized by the above-mentioned. Container. シール部（１１）を収容した溝（３４）の両側面のうち蓋（２）の外周側の側面（８）の内周面がシール部（１１）の高さ位置で容器頂縁（４）の領域における容器（１）の外周面と側方で接することを特徴とする請求項１〜８のいずれか１項に記載の容器。The inner peripheral surface of the side surface (8) on the outer peripheral side of the lid (2) among the both side surfaces of the groove (34) containing the seal portion (11) is the height of the seal portion (11), and the container top edge (4) The container according to any one of claims 1 to 8, wherein the container is in contact with the outer peripheral surface of the container (1) in the region. 容器外周面の頂縁（４）に隣接する部分に容器壁厚以内で径方向外向きに突出する複数のリブ（９）が一体成形されていることを特徴とする請求項９に記載の容器。  10. A container according to claim 9, wherein a plurality of ribs (9) projecting radially outward within a container wall thickness are integrally formed in a portion adjacent to the top edge (4) of the container outer peripheral surface. . 容器の頂縁（４）に対面する蓋のスナップ要素（７）側の容器外周面に、径方向外向きに突出する少なくとも一つの補強用周方向リブ（１６）が一体成形されていることを特徴とする請求項１〜１０のいずれか１項に記載の容器。At least one reinforcing circumferential rib (16) projecting radially outward is integrally formed on the outer peripheral surface of the container on the side of the snap element (7) of the lid facing the top edge (4) of the container. The container according to any one of claims 1 to 10, which is characterized by the following. 蓋（２）がシール部（１１）から離れた部分に容器内周面と密に接する環状部（２０）を有することを特徴とする請求項１〜１１のいずれか１項に記載の容器。The container according to any one of claims 1 to 11, characterized in that the lid (2) has an annular part (20) in close contact with the inner peripheral surface of the container at a part away from the seal part (11). 環状部が蓋の下面から下方へ突き出た環状突リブ（２０）からなることを特徴とする請求項１２に記載の容器。13. A container according to claim 12, characterized in that the annular part comprises an annular protruding rib (20) protruding downward from the lower surface of the lid. 容器内周面に蓋の環状突リブ（２０）よりも径方向内側位置で該突リブ（２０）の下端縁よりも上方へ突出する対向環状立上部（２２）が設けられていることを特徴とする請求項１３に記載の容器。  An opposed annular upright portion (22) is provided on the inner peripheral surface of the container so as to protrude above the lower end edge of the protruding rib (20) at a position radially inward of the annular protruding rib (20) of the lid. The container according to claim 13. 蓋（２）が容器内周面（３）よりも径方向内側位置に少なくとも一つの***部（２５，２９）を有し、該***部が蓋の頂面側に一体成形されて容器の主軸に向かって***していることを特徴とする請求項１２〜１４のいずれか１項に記載の容器。The lid (2) has at least one raised portion (25, 29) at a position radially inward of the inner peripheral surface (3) of the container, and the raised portion is integrally formed on the top surface side of the lid, and the main shaft of the container The container according to any one of claims 12 to 14, wherein the container projects upward. ***部（２５，２９）の頂部が、容器内周面と密に接する環状部（２０）から縦方向上方へ離れた位置にあることを特徴とする請求項１５に記載の容器。A container according to claim 15 in which the top portion, characterized in that located away annular portion in contact with the container inner peripheral surface closely from (20) in the longitudinal direction above the ridges (25, 29). ***部が蓋の内側で全周に延在する周縁部を形成していることを特徴とする請求項１５又は１６に記載の容器。The container according to claim 15 or 16, wherein the raised portion forms a peripheral edge extending all around inside the lid. 前記周縁部に内方へ向いた***部（２９）が一体成形されていることを特徴とする請求項１７に記載の容器。 18. A container according to claim 17, characterized in that an inwardly raised ridge (29) is integrally formed on the peripheral edge.
JP2001572378A 2000-04-01 2001-02-08 Plastic container with snap lid Expired - Fee Related JP3818919B2 (en)

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DE20006093U DE20006093U1 (en) 2000-04-01 2000-04-01 Plastic container with snap-on lid
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ATE287363T1 (en) 2005-02-15
ES2236196T3 (en) 2005-07-16
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MXPA02009624A (en) 2003-10-14
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CA2404876C (en) 2006-09-19
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