JP7587249B2 - Lid for packaging container - Google Patents
Lid for packaging container Download PDFInfo
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- JP7587249B2 JP7587249B2 JP2020071163A JP2020071163A JP7587249B2 JP 7587249 B2 JP7587249 B2 JP 7587249B2 JP 2020071163 A JP2020071163 A JP 2020071163A JP 2020071163 A JP2020071163 A JP 2020071163A JP 7587249 B2 JP7587249 B2 JP 7587249B2
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- lid
- top surface
- side wall
- packaging container
- resin sheet
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- 238000004806 packaging method and process Methods 0.000 title claims description 27
- 229920005989 resin Polymers 0.000 claims description 25
- 239000011347 resin Substances 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims 1
- -1 polypropylene Polymers 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 235000013305 food Nutrition 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000003856 thermoforming Methods 0.000 description 3
- 240000008415 Lactuca sativa Species 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 235000021156 lunch Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920005990 polystyrene resin Polymers 0.000 description 2
- 235000012045 salad Nutrition 0.000 description 2
- 235000012046 side dish Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
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- Closures For Containers (AREA)
- Stackable Containers (AREA)
Description
本発明は、段積みするのに適した、樹脂シートからなる包装用容器の蓋体又は容器本体に関する。 The present invention relates to a lid or container body for a packaging container made of a resin sheet, suitable for stacking.
お弁当、お惣菜、サラダ、麺類などが薄肉の樹脂シートからなる包装用容器に収容され、スーパーマーケットやコンビニエンスストアなどの店頭で段積みに陳列されていることがよく見かけられる。
このような包装用容器は、薄肉の樹脂シートから形成されていながら、段積みされても変形しない剛性を有するように設計されている。
Boxed lunches, side dishes, salads, noodles, etc. are often packed in packaging containers made of thin plastic sheets and displayed in stacks on store shelves at supermarkets, convenience stores, etc.
Although such packaging containers are made of thin resin sheets, they are designed to have sufficient rigidity so as not to deform even when stacked.
例えば、下記特許文献１には、容器本体と蓋体とを備え、容器本体の底面部に形成された凸部を受け入れるための凹部が蓋体の天面部に形成され、容器本体の凸部が蓋体の凹部に入り込むようにして多段に積み重ねることが可能な包装用容器において、蓋体の凹部の周縁に、蓋体内に突出する凸条からなる屈曲部が形成されることを特徴とする包装用容器が開示され、この包装用容器は多段積みにしても蓋体が潰れにくいものである。 For example, the following Patent Document 1 discloses a packaging container that includes a container body and a lid, in which a recess is formed on the top surface of the lid for receiving a protrusion formed on the bottom surface of the container body, and that can be stacked in multiple layers so that the protrusion of the container body fits into the recess of the lid. The packaging container is characterized in that a bent portion consisting of a protrusion that protrudes into the lid is formed around the periphery of the recess of the lid, and the lid is resistant to being crushed even when stacked in multiple layers.
上記特許文献１に記載の包装用容器の好ましい態様として、蓋体の天面部の外周から下方に延びる周壁部に、リブが周方向に適宜間隔を有して形成されることが開示されているように、周壁部の剛性を高めるために、リブを設けることがよく行われている。
しかし、周壁部に多数のリブを設けるとリブが視界を遮り内部に収容した収容物の視認性が悪くなる。特に段積みした場合は天面部が覆われ、内部を視認できる箇所が周壁部に限定されるため、ここに多数のリブを設けてしまうと収容物がどのようなものであるか確認しにくくなってしまうことがあった。
As disclosed in a preferred embodiment of the packaging container described in Patent Document 1 above, ribs are formed at appropriate intervals in the circumferential direction on the peripheral wall portion extending downward from the outer periphery of the top surface of the lid, and it is common to provide ribs in order to increase the rigidity of the peripheral wall portion.
However, providing many ribs on the peripheral wall portion reduces visibility of the contents stored inside because the ribs block the view. In particular, when containers are stacked, the top surface is covered and the only visible part of the container is the peripheral wall portion, so providing many ribs here can make it difficult to check what is stored inside.
そこで、本発明の目的は、周壁部に多数のリブなどを設けなくとも段積みできる剛性を備えた包装用容器の蓋体を提供することにあり、同様の構造を備えた容器本体も提供する。 The object of the present invention is to provide a lid for a packaging container that is rigid enough to be stacked without the need for multiple ribs on the peripheral wall, and also to provide a container body with a similar structure.
本発明の一形態の包装用容器の蓋体は、天面部と、その周縁から下方に向かう側壁部と、その下端部側に設けた、容器本体に嵌合する嵌合部と、を有し、樹脂シートからなる包装用容器の蓋体であって、該天面部を他の包装用容器を載せ置く平坦面状とし、該天面部と該側壁部との連結部分を、該天面部及び該側壁部をともに蓋体内側に向かい凹ませた凹状部とし、該凹状部を、断面において曲線からなる湾曲状として、該天面部の縁部全周に渡り設け、該天面部と該凹状部との結合部分である第一連結部及び該側壁部と該凹状部との結合部分である第二連結部の表面側の曲率半径が１．０ｍｍ以下になるよう折り曲げて形成してあることを特徴とする。 One form of the lid for a packaging container of the present invention has a top surface, a side wall portion extending downward from the periphery of the top surface, and a fitting portion provided on the lower end side of the top surface that fits into the container body, and is made of a resin sheet, wherein the top surface is made flat on which another packaging container is placed, and the connecting portion between the top surface and the side wall portion is made into a concave portion in which the top surface and the side wall portion are both recessed toward the inside of the lid body, and the concave portion is curved in cross section and provided around the entire edge of the top surface, and is formed by folding so that the radius of curvature on the surface side of the first connecting portion which is the connecting portion between the top surface and the concave portion and the second connecting portion which is the connecting portion between the side wall portion and the concave portion is 1.0 mm or less .
このように、樹脂シートからなる薄肉の包装用容器の蓋体において、天面部と側壁部との連結部分を凹状部にすることにより、天面部に他の包装用容器などを載せても凹状部が撓み、外力を適度に吸収するため、段積みしても側壁部などが押し潰れにくくなる。 In this way, by making the connecting portion between the top surface and the side wall of the thin-walled packaging container lid made of a resin sheet a concave portion, the concave portion bends even when another packaging container is placed on the top surface, absorbing external forces appropriately, so the side wall portion is less likely to be crushed even when stacked.
上記形態において、凹状部を、断面において湾曲状とすることができる。
このようにすることにより、凹状部が外力を吸収しやすくなるとともに弾性により復元しやすくなる。
In the above embodiment, the concave portion may be curved in cross section.
This allows the recessed portion to easily absorb external forces and easily return to its original shape due to its elasticity.
上記形態において、天面部及び側壁部をそれぞれ平坦面状にすることができる。
このようにすることにより、蓋体を透明などにした場合、天面部及び側壁部にリブなどがないため容器内部を視認しやすくなる。容器を段積みした場合は、側壁部を通して収容物を確認することができる。
In the above embodiment, the top surface and the side wall can each be flat.
By doing so, if the lid is made transparent, the inside of the container can be easily seen because there are no ribs on the top surface and side walls. If the containers are stacked, the contents can be seen through the side walls.
また、参考形態の包装用容器の容器本体は、底面部と、その周縁から上方に向かう側壁部と、その上端部側に設けた、蓋体に嵌合させる被嵌合部と、を有し、樹脂シートからなる包装用容器の容器本体であって、該底面部と該側壁部との連結部分を、該底面部及び該側壁部をともに本体内側に向かい凹ませた凹状部とし、該凹状部を、断面において曲線からなる湾曲状として、該底面部の縁部全周に渡り設け、該底面部と該凹状部との結合部分である第一連結部及び該側壁部と該凹状部との結合部分である第二連結部の表面側の曲率半径が１．０ｍｍ以下になるよう折り曲げて形成してあることを特徴とする。
このようにしても、蓋体と同様に、段積みしても凹状部が撓み、外力を適度に吸収するため、側壁部などが押し潰れにくくなる。
In addition, the container body of a packaging container of a reference form has a bottom portion, a side wall portion extending upward from the periphery of the bottom portion, and a fitting portion provided on the upper end side of the bottom portion to fit into a lid body, and is made of a resin sheet, and is characterized in that the connecting portion between the bottom portion and the side wall portion is a concave portion formed by recessing both the bottom portion and the side wall portion toward the inside of the body, the concave portion is curved in cross section and provided around the entire edge of the bottom portion, and is formed by folding so that the radius of curvature on the surface side of the first connecting portion which is the connecting portion between the bottom portion and the concave portion and the second connecting portion which is the connecting portion between the side wall portion and the concave portion is 1.0 mm or less .
Even in this case, as with the lids, the recessed portions bend even when stacked and absorb external forces appropriately, so that the side walls and the like are less likely to be crushed.
以下、本発明の包装用容器の蓋体の一実施形態を図面に基づいて説明する。 Below, one embodiment of the lid for a packaging container of the present invention will be described with reference to the drawings.
本発明の一実施形態の包装用容器の蓋体１は、図１に示すように、天面部１１と、側壁部１２と、凹状部１３とを備える。 As shown in FIG. 1, the lid 1 of a packaging container according to one embodiment of the present invention includes a top surface 11, a side wall 12, and a recessed portion 13.
天面部１１は、図２～図４に示すように、平面視長方形状の平坦面とした水平面状に形成してある。平坦面にすることにより、段積みしやすく、また、透明などにした場合、内部が視認しやすくなる。
本実施形態では平面視長方形状にしてあるが、これに限定されるものではなく、正方形や菱形などの平面視矩形状、六角形や八角形などの平面視多角形状、円形状、長円形状などにしてもよい。また、本実施形態では平坦面にしてあるが、中央付近が膨らむ曲面（ドーム）状、側面視で湾曲したアーチ状、凹凸を繰り返す波状などにしてもよい。
2 to 4, the top surface 11 is formed as a horizontal surface that is a flat surface having a rectangular shape in a plan view. By making it a flat surface, it is easy to stack the containers, and if it is transparent, it is easy to see inside.
In this embodiment, the shape is rectangular when viewed from above, but is not limited to this, and may be rectangular when viewed from above, such as a square or a rhombus, polygonal when viewed from above, such as a hexagon or an octagon, circular, elliptical, etc. Also, in this embodiment, the surface is flat, but the surface may be curved (dome) with a bulge near the center, arched when viewed from the side, or wavy with repeated projections and recesses.
側壁部１２は、図５に示すように、天面部１１の周囲から下方傾斜した平坦面に形成してある。平坦面にすることにより、透明などにした場合、内部が視認しやすくなる。
本実施形態では傾斜状の平坦面にしてあるが、これに限定されるものではなく、垂下面状、凸曲面状や凹曲面状にしてもよい。
天面部１１と側壁部１２とのなす角（図５のθ）は、特に限定するものではないが、９０°以上が好ましい。その上限値は１１０°以下にするのが好ましい。
5, the side wall portion 12 is formed as a flat surface that is inclined downward from the periphery of the top surface portion 11. By making the surface flat, if the side wall portion 12 is made transparent, the inside can be easily seen.
In this embodiment, the surface is an inclined flat surface, but the present invention is not limited to this, and the surface may be a drooping surface, a convex curved surface, or a concave curved surface.
The angle (θ in FIG. 5) between the top surface 11 and the side wall 12 is not particularly limited, but is preferably 90° or more, and the upper limit is preferably 110° or less.
凹状部１３は、天面部１１と側壁部１２の連結部分付近を凹ませ、周方向全周に渡り形成してある。本実施形態では凹状部１３を蓋体の周方向の全周に渡り形成してあるが、これに限定されるものではなく、凹状部１３を一部に設け、断続的に形成してもよい。他の部分は直角又は鈍角の折れ角状に屈曲させるのが好ましい。凹状部１３を周方向全周に渡り設けると外力吸収の機能を最大限に発揮できるが、蓋体１の剛性が低下するおそれがある。また、凹状部１３ではなく角状にすれば、蓋体１の剛性を高めることができる。さらに、デザイン性の観点から角状にするのが好ましい場合もある。この外力吸収との剛性の調整を図りつつ、デザイン性を加味して蓋体１の設計をするのが好ましい。このような観点から、凹状部１３を、天面部１１と側壁部１２の連結部分付近の周方向全周の長さに対して約半分以上、特に約７０％以上、さらに約８０％以上に設けるのが好ましい。
凹状部１３は、断面を湾曲状にしてある。この断面は、曲線状に形成してあれば半径が一定の円弧状でなくてもよい。このようにすることにより、天面部１１への荷重を凹状部１３で吸収することができ、復元しやすくなる。
本実施形態では断面湾曲状としてあるが、これに限定されるものではなく、断面において凹ませてあればよく、折れ線状に凹ませてもよい。
The concave portion 13 is formed around the entire circumference in the circumferential direction by recessing the vicinity of the connecting portion between the top surface portion 11 and the side wall portion 12. In this embodiment, the concave portion 13 is formed around the entire circumference in the circumferential direction of the lid body, but this is not limited thereto, and the concave portion 13 may be provided in a portion and formed intermittently. It is preferable that the other portions are bent at right angles or obtuse angles. If the concave portion 13 is provided around the entire circumference in the circumferential direction, the function of absorbing external forces can be maximized, but the rigidity of the lid body 1 may be reduced. In addition, if the concave portion 13 is made angular, the rigidity of the lid body 1 can be increased. Furthermore, from the viewpoint of design, it may be preferable to make it angular. It is preferable to design the lid body 1 while adjusting the rigidity with respect to the external force absorption and taking into account the design. From this viewpoint, it is preferable to provide the concave portion 13 at about half or more of the length of the entire circumference in the circumferential direction around the connecting portion between the top surface portion 11 and the side wall portion 12, particularly at about 70% or more, and further at about 80% or more.
The cross section of the recessed portion 13 is curved. This cross section does not have to be a circular arc with a constant radius as long as it is curved. By doing so, the load on the top surface portion 11 can be absorbed by the recessed portion 13, making it easier to restore the shape.
In this embodiment, the cross section is curved, but the present invention is not limited to this. It is sufficient that the cross section is concave, and the cross section may be concave in a broken line shape.
天面部１１と凹状部１３との結合部分である第一連結部１４は、特に限定するものではないが、蓋体１の表面側の曲率半径Ｒが１．０ｍｍ以下であるのが好ましい。また、側壁部１２と凹状部１３との結合部分である第二連結部１５は、特に限定するものではないが、蓋体１の表面側の曲率半径Ｒが１．０ｍｍ以下であるのが好ましい。このようにすることにより、凹状部１３で荷重を効率よく吸収することができる。 The first connecting portion 14, which is the connecting portion between the top surface portion 11 and the recessed portion 13, is not particularly limited, but it is preferable that the radius of curvature R on the surface side of the lid body 1 is 1.0 mm or less. The second connecting portion 15, which is the connecting portion between the side wall portion 12 and the recessed portion 13, is not particularly limited, but it is preferable that the radius of curvature R on the surface side of the lid body 1 is 1.0 mm or less. By doing so, the recessed portion 13 can efficiently absorb the load.
凹状部１３は、一定の幅で形成し、幅を狭く形成するのが好ましい。より具体的には、図２に示すように、平面視における凹状部１３の幅Ｗが、天面部１１及び凹状部１３の幅Ｗ´に対して８％以下の割合になるようにするのが好ましい。幅が広いと凹状部１３が撓み過ぎ、段積みした際に天面部１１が大きく沈み込んでしまう。なお、幅Ｗ´は、天面部１１及び凹状部１３の最大幅を示す。 The recessed portion 13 is preferably formed with a constant width and is preferably formed with a narrow width. More specifically, as shown in FIG. 2, it is preferable that the width W of the recessed portion 13 in a plan view is 8% or less of the width W' of the top surface portion 11 and the recessed portion 13. If the width is too wide, the recessed portion 13 will bend too much, and the top surface portion 11 will sink significantly when stacked. Note that the width W' indicates the maximum width of the top surface portion 11 and the recessed portion 13.
側壁部１２の下端部には、蓋体外側に向くフランジ部１６が形成してあり、その先端部には、垂下面とした嵌合部１７が設けてある。
嵌合部１７には、蓋体内側に向けて突出する係合部１８が形成してあり、容器本体２に嵌合できるようにしてある。係合部１８は、周方向に適宜長さで断続的に形成してある。蓋体１の四隅には舌片状に突き出る摘み部１９が設けてある。
A flange portion 16 is formed at the lower end of the side wall portion 12 so as to face outward from the lid body, and a fitting portion 17 is provided at the tip of the flange portion 16 as a hanging surface.
The fitting portion 17 is formed with engagement portions 18 that protrude toward the inside of the lid body so that it can be fitted into the container body 2. The engagement portions 18 are formed intermittently at an appropriate length in the circumferential direction. The lid body 1 is provided at its four corners with knobs 19 that protrude like tongues.
蓋体１を被せる容器本体２は、蓋体１を被せられるように設計してあればどのような形態でもよい。
容器本体２は、例えば、図６に示すように、いわゆるはかま型であり、平面視長方形状で水平面状の底面部２１の周縁から上方に立ち上がる側壁部２２を備え、壁面部２２の上端部を本体外側に折り返して被嵌合部２３を設け、その下端部を下方に延ばして脚部２４としたものである。
The container body 2 on which the lid 1 is to be placed may have any shape as long as it is designed so that the lid 1 can be placed thereon.
The container body 2 is, for example, as shown in Figure 6, of a so-called knuckle type, and has a rectangular shape when viewed from above, and a side wall portion 22 that rises upward from the periphery of a horizontal bottom portion 21, the upper end of the wall portion 22 is folded back to the outside of the body to form a fitting portion 23, and the lower end of the wall portion 22 extends downward to form legs 24.
被嵌合部２３は、蓋体１の嵌合部１７が外嵌合できるようにしてあり、本体外側に突出した係止部２５を全周に渡り形成し、係合部１８が係合するようにしてある。
本実施形態では、蓋体１を容器本体２に外嵌合する構造としてあるが、これに限定されるものではなく、内嵌合、内外嵌合などの嵌合構造でもよく、蓋体１を容器本体２に載せ置く構造でもよい。
The fitted portion 23 is designed so that the fitting portion 17 of the lid 1 can be fitted onto it from the outside, and a locking portion 25 is formed around the entire periphery, protruding outward from the main body, so that the engaging portion 18 can engage with it.
In this embodiment, the lid body 1 is structured to be externally fitted to the container body 2, but this is not limited to this and may be a fitting structure such as internal fitting or internal and external fitting, or a structure in which the lid body 1 is placed on the container body 2.
蓋体１及び容器本体２からなる包装用容器は、例えば、食料品などを収容物として収容することができ、より具体的には、お弁当、お惣菜、お寿司、サラダなどを収容することができる。 The packaging container consisting of the lid 1 and the container body 2 can hold, for example, food items, and more specifically, bento lunches, side dishes, sushi, salads, etc.
蓋体１及び容器本体２は、特に限定するものではないが、合成樹脂シートを熱成形して製造することができる。合成樹脂シートは、非発泡樹脂シート、発泡樹脂シートのいずれでもよいが、非発泡樹脂シートが好ましい。
非発泡樹脂シートの場合には、いわゆる薄肉樹脂シートを用いるのが好ましく、具多的には、厚みが０．１ｍｍ～２．０ｍｍの範囲内、特に０．２ｍｍ～１．２ｍｍの範囲内のシートを用いるのが好ましい。
発泡樹脂シートの場合には、厚みが０．５ｍｍ～４．０ｍｍの範囲内、特に０．７ｍｍ～２．２ｍｍの範囲内のシートを用いるのが好ましい。また、発泡樹脂シートの場合には、発泡倍率を１．０５倍～２０．０倍、特に１．５倍～１５．０倍にするのが好ましい。
The lid 1 and the container body 2 can be produced by thermoforming a synthetic resin sheet, although there is no particular limitation thereto. The synthetic resin sheet may be either a non-foamed resin sheet or a foamed resin sheet, with a non-foamed resin sheet being preferred.
In the case of a non-foamed resin sheet, it is preferable to use a so-called thin resin sheet, specifically, a sheet having a thickness in the range of 0.1 mm to 2.0 mm, particularly 0.2 mm to 1.2 mm.
In the case of a foamed resin sheet, it is preferable to use a sheet having a thickness in the range of 0.5 mm to 4.0 mm, particularly in the range of 0.7 mm to 2.2 mm. In addition, in the case of a foamed resin sheet, it is preferable to set the expansion ratio to 1.05 times to 20.0 times, particularly in the range of 1.5 times to 15.0 times.
非発泡樹脂シートとしては、例えば、ポリエチレン系樹脂シート・ポリプロピレン系樹脂シートなどのポリオレフィン系樹脂シート、ポリスチレン系樹脂シート、ポリエチレンテレフタレート系樹脂シート・耐熱性を付与した変性ポリエチレンテレフタレート系樹脂シートなどのポリエステル系樹脂シートなどの熱可塑性樹脂シートを用いることができる。また、電子レンジの加熱に耐え得るもの、例えば、耐熱性ポリスチレン系樹脂シート、ポリプロピレン系樹脂シート、耐熱性を付与した変性ポリエチレンテレフタレート系樹脂シートを用いてもよい。 As the non-foamed resin sheet, for example, a thermoplastic resin sheet such as a polyolefin resin sheet such as a polyethylene resin sheet or a polypropylene resin sheet, a polyester resin sheet such as a polystyrene resin sheet, a polyethylene terephthalate resin sheet, or a modified polyethylene terephthalate resin sheet with heat resistance can be used. In addition, a sheet that can withstand heating in a microwave oven, for example, a heat-resistant polystyrene resin sheet, a polypropylene resin sheet, or a modified polyethylene terephthalate resin sheet with heat resistance can be used.
発泡樹脂シートとしては、例えば、発泡ポリオレフィン系樹脂シート、発泡ポリスチレン系樹脂シート、発泡ポリエチレンテレフタレートなどの発泡ポリエステル系樹脂シートを用いることができる。
合成樹脂シートを積層した積層シートを用いることもでき、積層シートとしては、例えば、非発泡樹脂シート又は発泡樹脂シートに樹脂フィルムを熱ラミネートした積層シート、共押出法による積層シート、押出ラミネート法による積層シートなどを挙げることができる。
As the foamed resin sheet, for example, a foamed polyolefin-based resin sheet, a foamed polystyrene-based resin sheet, a foamed polyester-based resin sheet such as a foamed polyethylene terephthalate resin sheet, etc. can be used.
A laminated sheet obtained by laminating synthetic resin sheets can also be used. Examples of the laminated sheet include a laminated sheet obtained by thermally laminating a resin film onto a non-foamed resin sheet or a foamed resin sheet, a laminated sheet produced by a co-extrusion method, and a laminated sheet produced by an extrusion lamination method.
熱成形としては、真空成形、圧空成形、真空圧空成形、熱板成形などを挙げることができる。蓋体１を熱成形する際には、雄型を用いて成型するのが好ましい。雄型を用いることにより、天面部１１の厚みを厚くしやすくなり、剛性を上げることができる。 Examples of thermoforming include vacuum forming, pressure forming, vacuum pressure forming, and hot plate forming. When thermoforming the lid 1, it is preferable to use a male mold. By using a male mold, it becomes easier to increase the thickness of the top surface 11, and the rigidity can be increased.
蓋体１及び容器本体２は、黒色や白色などの有色でもよいが、内部が視認できるように透明乃至半透明であることが好ましく、特に、蓋体１は透明乃至半透明が好ましく、容器本体２は黒色などの非透明が好ましい。また、蓋体１の表面に、視認性を妨げない程度に、文字、絵柄などの印刷や刻印を施してもよく、補強のためのリブを設けることや滑り止めのためのシボ加工を施してもよい。直方体状に膨出させたスタック用突起部Ｓを設けることもでき、蓋体１を重ねた際に各蓋体１が密着しないようにすることができる。 The lid 1 and container body 2 may be colored, such as black or white, but are preferably transparent or translucent so that the inside can be seen. In particular, it is preferable that the lid 1 be transparent or translucent, and the container body 2 be non-transparent, such as black. The surface of the lid 1 may be printed or engraved with letters, patterns, etc., to the extent that visibility is not hindered, and ribs may be provided for reinforcement or textured to prevent slipping. A stacking protrusion S that bulges out in a rectangular parallelepiped shape may also be provided, so that the lids 1 do not stick to each other when stacked.
図示しないが、本発明の他の実施形態として、容器本体に凹状部を設けた構造にすることもできる。
この容器本体は、例えば、蓋体１を天地逆さにした構造をなし、より具体的には、平面状の底面部の周縁から上方に向かう側壁部を有し、底面部と側壁部との連結部分を本体内側に向かい凹ませた凹状部として形成することができる。この場合も、凹状部を、断面において湾曲状とし、底面部及び側壁部をそれぞれ平坦面状にすることが好ましい。
このような容器本体は、凹状部で容器本体への荷重を吸収することができるため、側壁部が押し潰されにくくなる。
Although not shown, as another embodiment of the present invention, a structure in which a recess is provided in the container body can also be used.
This container body can have a structure in which the lid 1 is turned upside down, and more specifically, it has a side wall extending upward from the periphery of the flat bottom, and the connecting portion between the bottom and the side wall can be formed as a concave portion recessed toward the inside of the body. In this case, too, it is preferable that the concave portion is curved in cross section, and the bottom and side wall are each flat.
In such a container body, the recessed portion can absorb the load on the container body, so that the side wall portion is less likely to be crushed.
蓋体１と容器本体２をヒンジ部で一体的に連結した、いわゆるフードパックにしてもよい。 The lid 1 and container body 2 may be integrally connected by a hinge to form a so-called food pack.
本実施形態の包装用容器は、例えば、容器本体２に食料品を収容した後、蓋体１を嵌合させて使用することができる。 The packaging container of this embodiment can be used, for example, by placing food in the container body 2 and then fitting the lid body 1.
この包装用容器は段積みした場合、天面部１１が押下されても、図７に示すように、凹状部１３が撓み、側壁部１２に荷重がかかりにくく、側壁部１２が押し潰されにくくなる。そのため、側壁部１２に補強するためのリブなどを設けなくともよい。特に蓋体１を透明にした場合は、段積みしても側壁部１２にリブなどがないため、視認性がよく、内部の収容物を確認することができる。 When these packaging containers are stacked, even if the top surface 11 is pressed down, as shown in FIG. 7, the recessed portion 13 bends, so that the side wall portion 12 is less likely to be loaded and is less likely to be crushed. Therefore, it is not necessary to provide ribs or the like for reinforcing the side wall portion 12. In particular, when the lid 1 is made transparent, there are no ribs or the like on the side wall portion 12 even when stacked, so visibility is good and the contents inside can be confirmed.
天面部１１にかかる荷重を取り除けば、凹状部１３の弾性力により、元の形状に復元することができる。 When the load on the top surface 11 is removed, the elasticity of the recessed portion 13 allows it to return to its original shape.
上記実施形態の構成態様は、本発明を限定するものとして挙げたものではなく、技術目的を共通にする限り変更は可能であり、本発明はそのような変更を含むものである。 The configuration aspects of the above embodiment are not intended to limit the present invention, and modifications are possible as long as the technical objective is the same, and the present invention includes such modifications.
１蓋体
１１天面部
１２側壁部
１３凹状部
１４第一連結部
１５第二連結部
１６フランジ部
１７嵌合部
１８係合部
１９摘み部
２容器本体
２１底面部
２２側壁部
２３被嵌合部
２４脚部
２５係止部
Ｓスタック用突起部
1 Lid 11 Top surface 12 Side wall 13 Concave portion 14 First connecting portion 15 Second connecting portion 16 Flange portion 17 Fitting portion 18 Engagement portion 19 Handle portion 2 Container body 21 Bottom surface 22 Side wall 23 Fitted portion 24 Leg portion 25 Locking portion S Stacking projection
Claims (4)
該天面部を、他の包装用容器を載せ置く平坦面状とし、
該天面部と該側壁部との連結部分を、該天面部及び該側壁部をともに蓋体内側に向かい凹ませた凹状部とし、
該凹状部を、断面において曲線からなる湾曲状として、該天面部の縁部全周に渡り設け、
該天面部と該凹状部との結合部分である第一連結部及び該側壁部と該凹状部との結合部分である第二連結部の表面側の曲率半径が１．０ｍｍ以下になるよう折り曲げて形成してある、
包装用容器の蓋体。 A lid for a packaging container made of a resin sheet, the lid having a top surface portion, a side wall portion extending downward from the periphery of the top surface portion, and a fitting portion provided on the lower end side of the side wall portion for fitting into a container body,
The top surface is a flat surface on which other packaging containers can be placed,
A connecting portion between the top surface portion and the side wall portion is a concave portion formed by concaving both the top surface portion and the side wall portion toward the inside of the lid body,
The recessed portion is curved in cross section and is provided around the entire edge of the top surface portion,
a first connecting portion which is a connecting portion between the top surface portion and the recessed portion, and a second connecting portion which is a connecting portion between the side wall portion and the recessed portion are bent so that the radius of curvature on the surface side is 1.0 mm or less ;
A lid for a packaging container.
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| JP2020071163A JP7587249B2 (en) | 2020-04-10 | 2020-04-10 | Lid for packaging container |
| JP2024094383A JP7803573B2 (en) | 2020-04-10 | 2024-06-11 | Container body of packaging container |
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| JP2021167210A (en) | 2021-10-21 |
| JP2024113173A (en) | 2024-08-21 |
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