JP5635158B2 - Sealed container - Google Patents
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- JP5635158B2 JP5635158B2 JP2013109882A JP2013109882A JP5635158B2 JP 5635158 B2 JP5635158 B2 JP 5635158B2 JP 2013109882 A JP2013109882 A JP 2013109882A JP 2013109882 A JP2013109882 A JP 2013109882A JP 5635158 B2 JP5635158 B2 JP 5635158B2
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- 230000013011 mating Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 239000004743 Polypropylene Substances 0.000 description 8
- -1 polyethylene terephthalate Polymers 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 235000013305 food Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 235000021067 refined food Nutrition 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 241000219310 Beta vulgaris subsp. vulgaris Species 0.000 description 1
- 235000021536 Sugar beet Nutrition 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 235000021438 curry Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
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Description
本発明は、ともに合成樹脂製の容器本体と蓋とからなり、蓋の縁部を容器本体の開口縁部に嵌合することにより密封され、内部に収容した食品等への雑菌侵入を防止したり、食品等に付随している液体の外部漏出を防止することができる包装用容器の改良に関する。 Both the present invention consists of a container body and a lid made of synthetic resin, and is sealed by fitting the edge of the lid to the opening edge of the container body, preventing invasion of germs into the food contained therein. In addition, the present invention relates to an improvement in a packaging container that can prevent external leakage of liquid accompanying food or the like.
加工食品の流通販売に際しては、外部から収容物が視認できるように透明な合成樹脂製の包装用容器が用いられることが多い。最も汎用されているのは、蓋の縁部において断面伏せコ字状をした下向きの凹条をなす嵌合部を設ける一方、容器本体の開口縁部においても同様な上向の凸条をなす嵌合部を設けて、両嵌合部により容器本体に対する蓋の嵌着を図ることとした、いわゆる内外嵌合タイプの包装用容器である。このタイプの容器では、薄肉のシート成形品であっても蓋と容器本体が嵌合する周縁部分の接触面積が広いので、比較的液漏れしにくいとされている。 In the distribution and sale of processed foods, transparent synthetic resin packaging containers are often used so that the contents can be visually recognized from the outside. The most widely used is to provide a fitting part that forms a downward concave line with a U-shaped cross-section at the edge of the lid, while forming a similar upward convex line at the opening edge of the container body. This is a so-called inside / outside fitting type packaging container in which fitting parts are provided and a lid is fitted to the container body by both fitting parts. In this type of container, even a thin sheet molded product has a large contact area at the peripheral edge where the lid and the container main body are fitted, so that it is relatively difficult to leak.
しかしながら、容器の設計・成形精度や成形後の変形等によって嵌合部分に所期の密着性が得られなかったり、あるいは搬送時の変形によって嵌合部分に隙間が生じることにより密封性(気密性・水密性)が損なわれ、水分の多い惣菜や汁物などにおいては液漏れすることが多かった。そこで、従来から様々な構造の密封容器が提案されている。 However, due to the design / molding accuracy of the container, deformation after molding, etc., the desired adhesion to the mating part cannot be obtained, or due to deformation during transportation, a gap is created in the mating part (sealing performance)・ Watertightness) was impaired, and liquid dishes such as sugar beet and soup were often leaked. Therefore, conventionally, various sealed containers have been proposed.
例えば、本件出願人が先に提案した密封容器(特許文献1)は、容器本体及び蓋をともにポリエステル樹脂を用いて成形し、嵌合縁部における少なくとも口縁側を略S字状に屈曲させつつ、口縁側と外縁側との間の天井部を丸く形成することによって、蓋を嵌めるときに蓋側の嵌合縁部内に容器本体側の嵌合縁部が滑り込み易くする一方、両嵌合部分における密着性を高めるように形成している。すなわち、蓋と容器本体の嵌合縁部をともに断面略Ω字状として全周に亘って広幅に密着させた結果、高い密封性が確保されたのである。 For example, in the sealed container previously proposed by the present applicant (Patent Document 1), the container body and the lid are both formed using a polyester resin, and at least the mouth side of the fitting edge is bent in a substantially S shape. By forming the ceiling part between the mouth edge side and the outer edge side round, the fitting edge part on the container body side can easily slip into the fitting edge part on the lid side when the lid is fitted, while both fitting parts It forms so that the adhesiveness in may be improved. That is, both the lid and the fitting edge of the container main body have a substantially Ω-shaped cross section and are brought into close contact with each other over the entire circumference. As a result, high sealing performance is ensured.
また、容器本体における嵌合部分の周壁面に複数列の嵌着溝を設けるとともに、蓋における嵌合部分の周壁面に複数列の嵌着凸条を設けて、主としてこれら嵌着溝と嵌着凸条の嵌着により密閉状態を実現しようとする蓋付容器も提案されている(特許文献2)。 In addition, a plurality of rows of fitting grooves are provided on the peripheral wall surface of the fitting portion of the container body, and a plurality of rows of fitting protrusions are provided on the peripheral wall surface of the fitting portion of the lid. There has also been proposed a container with a lid that attempts to realize a sealed state by fitting convex protrusions (Patent Document 2).
ところが、前記特許文献1に係る密封容器は、ポリエステル(PE)やポリエチレンテレフタレート(PET)のように樹脂自体の特性として腰があり粘りがある材料を用いた場合には、とくに嵌合部分を高くして容器本体と蓋の密着幅を広くすることによって密封性を高めることが可能であったが、軟質なポリプロピレン(PP)製の容器とした場合には望ましい密封性が得られなかった。腰の弱いポリプロピレンでは容器本体と蓋との嵌合部分に隙間が生じやすいことが原因と考えられる。
However, the hermetic container according to
また、前記特許文献2に係る蓋付容器では、容器本体における外側周壁と、蓋におけるカバー周壁とはわずかに重なり合っているにすぎず、実質的にはいわゆる内内嵌合タイプであり、複数列の嵌着溝と嵌着凸条の嵌着のみによって密閉状態を実現しようとしているため、やはりポリプロピレンのような腰の弱い樹脂製品とした場合には、運搬時等に容器自体が変形してしまうために嵌合部分に隙間が生じやすく、結果的に内容物からの液漏れがしやすいという欠点があったのである。
Further, in the container with a lid according to
ここで、容器をポリプロピレン製とした場合には、温度変化に強く、冷凍保存していた加工食品をそのまま電子レンジで解凍加熱することが可能となるため、カレーなど惣菜用の包装用容器としては最適となる。しかるに、本発明では、軟質で腰の弱いポリプロピレン製とした場合においても高い密封性を確保することができる包装用容器を提供することを課題とするものである。 Here, when the container is made of polypropylene, it is resistant to temperature changes, and it is possible to thaw and heat the processed food that has been stored frozen in a microwave oven, so as a packaging container for prepared dishes such as curry It will be optimal. However, an object of the present invention is to provide a packaging container that can ensure high sealing performance even when it is made of soft and weak polypropylene.
前記所期の課題解決を図るため、本発明に係る密封容器では、開口部の周囲に嵌合凸条を周設した容器本体と、前記嵌合凸条に対応した下向きの嵌合凹条を周設した蓋とからなる内外嵌合タイプとして、嵌合凸条の外壁外面において水平な線条溝を周設するとともに、嵌合凹条の外壁内面において内向きに水平な線条突起を周設し、容器本体に蓋を嵌着したときには線条溝内に線条突起が嵌入するよう形成した。 In order to solve the desired problem, in the sealed container according to the present invention, a container main body provided with a fitting protrusion around the opening, and a downward fitting groove corresponding to the fitting protrusion. As an inner / outer fitting type consisting of a cover provided around the periphery, a horizontal linear groove is provided on the outer surface of the outer wall of the fitting protrusion, and an inward horizontal linear protrusion is provided around the inner surface of the outer surface of the fitting groove. It was formed so that when the lid was fitted to the container body, the line projections were fitted into the line grooves.
容器本体における嵌合凸条と蓋における嵌合凹条による嵌合部分は、前記特許文献1により開示した容器と同じく、断面略Ω字状として全周に亘って広幅に密着させるようにしておくとよい。すなわち、(1)内嵌合部の断面形状が略S字形をなすように、各内壁の基部側がやや外方向に膨れた(すなわち、各内壁の頂部側がやや内方向に膨れた)形状とし、(2)天井部(頭頂部)は断面ドーム型をなすように丸く形成し、(3)外縁外周に広幅のツバ部を形成することで、本来的に密着性を高めておく。その上で、容器本体側の線条溝と蓋側の線条突起を嵌合させることにより、蓋と容器のズレ、隙間の発生を防止したのである。とくに腰の弱いポリプロピレン製とした場合には、内嵌合部における蓋側の押圧力が弱いためか、内嵌合部に線条溝と線条突起を周設するよりも、外嵌合部に線条溝と線条突起を周設する方が効果的であった。
The fitting portion formed by the fitting protrusion on the container main body and the fitting groove on the lid is made to have a substantially Ω-shaped cross section so as to be in close contact with the entire circumference, like the container disclosed in
また、容器本体における線条溝の深さを蓋における線条突起の高さより大として、容器本体に蓋を嵌着したときには線条溝と線条突起間に隙間(空間)が確保されるようにするとよい。両者の隙間は恰もトンネルのように容器の全周に亘る空間として形成されるところ、運搬時の変形等に起因してわずかながらも嵌合凸条を乗り越えた水分は、その表面張力により当該トンネル空間内に残存し、容器外への漏出が抑制されるのである。 Further, the depth of the linear groove in the container body is made larger than the height of the linear protrusion in the lid so that a gap (space) is secured between the linear groove and the linear protrusion when the lid is fitted to the container body. It is good to. The gap between the two is formed as a space around the entire circumference of the container like a tunnel, but the moisture that has slightly overcome the fitting ridge due to deformation during transportation etc. is caused by the surface tension of the tunnel. It remains in the space and is prevented from leaking out of the container.
そして、容器本体と蓋をともにポリプロピレンシート材を用いて成形するときには、容器本体を真空成形する一方、蓋を圧空成形するとよい。真空成形は深物に適しているばかりでなく溝形の再現性がよくなる特徴がある一方、圧空成形は高い透明性を確保できるばかりでなく溝形が緩やかになる特徴があるので、線条溝と線条突起間における隙間が容易に確保できる利点がある。 When both the container main body and the lid are molded using a polypropylene sheet material, the container main body is vacuum-formed while the lid is pressure-molded. Vacuum forming is not only suitable for deep objects, but also has the feature of improving the reproducibility of the groove shape, while compressed air forming has the feature of not only ensuring high transparency but also a gentle groove shape. There is an advantage that a gap between the wire projections can be easily secured.
本発明に係る密封容器では、内外嵌合方式の外嵌合部において容器本体側の線条溝と蓋側の線条突起による嵌合を図ったので、例えば容器内に封入された空気圧の上昇により蓋が持ち上げられようとしても嵌合状態を維持することができるため、高い密封性を確保することができる。 In the sealed container according to the present invention, since the fitting is performed by the linear groove on the container body side and the linear protrusion on the lid side in the outer fitting portion of the inner / outer fitting method, for example, the increase in the air pressure enclosed in the container Thus, even if the lid is lifted, the fitted state can be maintained, so that high sealing performance can be ensured.
とくに、線条溝と線条突起間においてトンネル空間が容器の全周に亘って確保されるようにしておくと、内嵌合部の密着部分や嵌合凸条を乗り越えた水分がトンネル空間内にとどまり、容器外への漏出が防止されるのである。 In particular, if the tunnel space is ensured over the entire circumference of the container between the line grooves and the line protrusions, the moisture that has passed over the tightly fitting part of the inner fitting part and the fitting protrusions will enter the tunnel space. However, leakage to the outside of the container is prevented.
以下、本発明に係る密封容器につき、図面にもとづいて詳細に説明する。図1は、本発明に係る密封容器の一例を示した縦端面図であり、(イ)が蓋C、(ロ)が容器本体Bをそれぞれ示している。また、図2は、図1における左上縁の嵌合部分を拡大した図であり、やはり(イ)が蓋C、(ロ)が容器本体Bをそれぞれ示している。図3は、容器本体Bに蓋Cを嵌着した状態を示す嵌合部分の部分拡大端面図である。これらに図示された例の密封容器は平面視円形で、閉蓋時には全体が略円柱状をした容器を想定しているが、本発明は平面視方形や平面視多角形など様々な容器に適用できることは言うまでもない。ただ、平面視円形とした場合には、嵌合部分に内圧が均等に作用するので、より液漏れしにくくなる利点がある。 Hereinafter, the sealed container according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal end view showing an example of a sealed container according to the present invention, in which (A) shows a lid C and (B) shows a container body B, respectively. FIG. 2 is an enlarged view of the fitting portion at the upper left edge in FIG. 1, where (A) shows the lid C and (B) shows the container body B, respectively. FIG. 3 is a partially enlarged end view of the fitting portion showing a state where the lid C is fitted to the container body B. FIG. The sealed containers of the examples shown in the drawings are circular in plan view, and are assumed to be generally cylindrical when closed, but the present invention is applicable to various containers such as a square in plan view and a polygon in plan view. Needless to say, you can. However, in the case of a circular shape in plan view, there is an advantage that the liquid pressure is less likely to leak because the internal pressure acts uniformly on the fitting portion.
図1に示されるように、本発明に係る密封容器では、容器本体Bにおける上面側の開口部の全周囲に嵌合凸条B1を設ける一方、この嵌合凸条B1に対応した下向きの嵌合凹条C1を全周縁に設けた蓋Cとから構成される。容器本体Bの嵌合凸条B1における外壁B11の外面には、水平方向に延びる線条溝B12が全周に亘って設けられている(図2(ロ)参照)。線条溝B12の断面形状は、図示されるような半円形状に限定されるものではないが、成形金型との関係で抜きやすいように、滑らかな曲面形状にしておくのが望ましい。 As shown in FIG. 1, in the sealed container according to the present invention, the fitting protrusion B1 is provided around the entire opening of the upper surface side of the container body B, while the downward fitting corresponding to the fitting protrusion B1 is provided. It is comprised from the cover C which provided the recessed groove C1 in the whole periphery. On the outer surface of the outer wall B11 of the fitting protrusion B1 of the container body B, a linear groove B12 extending in the horizontal direction is provided over the entire circumference (see FIG. 2 (B)). The cross-sectional shape of the linear groove B12 is not limited to a semicircular shape as shown in the drawing, but it is desirable that the linear groove B12 has a smooth curved shape so that it can be easily pulled out in relation to the molding die.
一方、蓋Cの嵌合凹部C1における外壁C11の内面には、内向きに凸となる線条突起C12が水平方向に全周に亘って設けられている。この線条突起C12の断面形状も図示されるような半円形状に限定されるものではないが、前記線条溝B12内におさまるようやや小さめに、換言すれば、線条溝B12の深さを線条突起C12の高さよりも大とすることによって、蓋Cを容器本体Bに嵌着した際には線条溝B12と線条突起C12間に隙間(空間)が確保されることになる。 On the other hand, on the inner surface of the outer wall C11 in the fitting recess C1 of the lid C, a linear protrusion C12 that protrudes inward is provided over the entire circumference in the horizontal direction. The cross-sectional shape of the line protrusion C12 is not limited to the semicircular shape as shown in the figure, but is slightly smaller to fit in the line groove B12, in other words, the depth of the line groove B12. When the lid C is fitted to the container body B, a gap (space) is secured between the linear groove B12 and the linear protrusion C12. .
すなわち、図3に示されるように、容器本体Bに対して蓋Cを嵌着した際には、内嵌合部における容器本体Bの内壁B13が蓋Cの内壁C13と密着し、頭頂部においては容器本体Bの天井部B14と蓋Cの天井部C14は共に断面ドーム型をなすように丸く形成されつつも離隔して隙間S1が確保されており、外嵌合部における容器本体Bの外壁B11と蓋Cの外壁C11とは密着しているものの、容器本体Bの線条溝B12と蓋Cの線条突起C12との間には隙間S2が確保され、引き続き前記外壁B11と外壁C11とが密着した上で広幅の各ツバ部B15,C15に至るように形成されている。図面上は各ツバ部B15,C15間は離隔しているように描かれているが、実際には、切り離し端部となるこれら各ツバ部B15,C15同士はほぼ密着するようになる。 That is, as shown in FIG. 3, when the lid C is fitted to the container main body B, the inner wall B13 of the container main body B in the inner fitting portion is in close contact with the inner wall C13 of the lid C, and at the top of the head. The ceiling part B14 of the container body B and the ceiling part C14 of the lid C are both rounded so as to form a dome-shaped cross section, but are spaced apart to ensure a gap S1, and the outer wall of the container body B at the outer fitting part Although B11 and the outer wall C11 of the lid C are in close contact with each other, a gap S2 is secured between the linear groove B12 of the container body B and the linear projection C12 of the lid C. Subsequently, the outer wall B11 and the outer wall C11 Are formed so as to reach the wide brim portions B15 and C15. In the drawing, the flanges B15 and C15 are drawn so as to be separated from each other, but in actuality, the flanges B15 and C15 serving as the separation end portions are almost in close contact with each other.
そして、容器本体Bの外壁B11と、蓋Cの外壁C11とを可能なかぎり広い範囲で密着させるべく、容器本体Bにおける嵌合凸条B1と蓋Cにおける嵌合凹条C1は、いずれも基部側の内幅Yよりも頂部側の内幅Xが広くなるように形成するとよい。閉蓋するべく、容器本体Bにおける嵌合凸条B1の頂部を蓋Cにおける嵌合凹条C1の基部から嵌入させる際には、前者で後者をやや押し広げるような力を要するものの、いったん嵌入されてしまえば脱落しづらく密着度も高まる利点がある。 In order to bring the outer wall B11 of the container body B and the outer wall C11 of the lid C into close contact with each other as much as possible, the fitting protrusion B1 in the container body B and the fitting groove C1 in the lid C are both base parts. Preferably, the inner width X on the top side is wider than the inner width Y on the side. In order to close the lid, when the top of the fitting protrusion B1 in the container body B is fitted from the base of the fitting groove C1 in the lid C, the former requires a force that slightly expands the latter, but once fitted If it is done, there is an advantage that it is difficult to drop off and the degree of adhesion increases.
B 容器本体
B1 嵌合凸条
B11 外壁
B12 線条溝
B13 内壁
B14 天井部
B15 ツバ部
C 蓋
C1 嵌合凹条
C11 外壁
C12 線条突起
C13 内壁
C14 天井部
C15 ツバ部
B Container body B1 Mating protrusion B11 Outer wall B12 Linear groove B13 Inner wall B14 Ceiling part B15 Head part C Lid C1 Mating groove C11 Outer wall C12 Linear protrusion C13 Inner wall C14 Ceiling part C15 Head part
Claims (1)
嵌合凸条の外壁外面において水平な線条溝を周設するとともに、
嵌合凹条の外壁内面において内向きに水平な線条突起を周設して、
容器本体に蓋を嵌着したときには線条溝内に線条突起が嵌入するよう形成してなり、
線条溝の深さを線条突起の高さより大として、容器本体に蓋を嵌着したときには、容器本体の外壁と蓋の外壁とは密着しつつ、容器本体及び蓋の全周に亘り、曲面状の線条溝と曲面状の線条突起間に隙間が確保されるようにしてなり、
前記隙間は、前記嵌合凸条を乗り越えた水分を表面張力により残存させるためのものであることを特徴とする密封容器。
An inner / outer fitting type sealed container comprising a container main body provided with a fitting protrusion around the opening, and a lid provided with a downward fitting groove corresponding to the fitting protrusion,
A horizontal linear groove is provided around the outer surface of the outer wall of the fitting protrusion,
On the inner surface of the outer wall of the mating recess, a horizontal line projection is placed inward,
When the lid is fitted to the container body, the linear protrusion is inserted into the linear groove,
When the depth of the linear groove is greater than the height of the linear protrusion and the lid is fitted to the container body, the outer wall of the container body and the outer wall of the lid are in close contact with each other over the entire circumference of the container body and the lid. A gap is secured between the curved line groove and the curved line protrusion,
The said clearance gap is for making the water | moisture content which got over the said fitting ridge remain by surface tension, The sealed container characterized by the above-mentioned.
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JP2007231887A Division JP5441327B2 (en) | 2007-09-06 | 2007-09-06 | Sealed container |
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JPH0191757U (en) * | 1987-12-10 | 1989-06-15 | ||
JP2790794B2 (en) * | 1996-06-20 | 1998-08-27 | 東洋エコー株式会社 | Mating container |
JP2004067140A (en) * | 2002-08-05 | 2004-03-04 | Japan Xanpak Corp | Food container |
JP4895631B2 (en) * | 2006-02-14 | 2012-03-14 | 株式会社北原産業 | Packaging container |
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