JP2021001024A - Food packaging container - Google Patents

Abstract

To provide a food packaging container that makes it easy to fit a dish part, makes it difficult to remove the dish part during cooking, and makes it easy for some users to remove the dish part.SOLUTION: A food packaging container 100 includes at least a container body 1 and a dish part 2. The container body 1 has a lower fitting part 14 on a container side extending over one round on an inner peripheral side surface of the container body 1 and an annular container-side horizontal part that extends endlessly over one round in a radial direction of the container body 1 at a position higher than the lower fitting part 14 and extends horizontally outward in the radial direction of the container body 1. The dish part 2 has a dish side fitting part 26 that extends over one round on an outer peripheral side surface of the dish part 2 and fits with the lower part fitting part 14 and an annular upper rib 28 that extends endlessly over one round in a radial direction of the dish part 2 at a position higher than the dish side fitting part 26 and rests on the horizontal part on the container side and swells upward.SELECTED DRAWING: Figure 2

Description

The present invention relates to a food packaging container in which food can be separated into upper and lower parts by a mounted dish.

There is a food packaging container having a container body, a dish and a lid. In this type of food packaging container, the dish portion is pushed into the internal space of the container body, and the dish portion is internally fitted into the container body. Since the internal space defined by the bottom surface and the side surface of the container body is separated into upper and lower parts by the dish portion, the food packaging container can store food separately in the dish portion and the bottom of the container body. This is useful when you do not want to mix the food placed on the dish and the food placed on the bottom of the container until just before cooking.

The internal pressure of such a food packaging container increases due to heating using a microwave oven. When the internal pressure acts on the dish, the dish may come off from the container body during cooking, and the food placed on the dish and the food placed on the bottom of the container may be mixed.

Therefore, in the food packaging container of Patent Document 1, the shape of the engaging portion between the dish portion and the container body is devised so that the dish portion does not easily come off from the container body. Specifically, on the outer peripheral side surface of the dish portion, a reverse-tapered engaging portion whose diameter is linearly expanded from the opening on the upper surface of the dish portion toward the bottom surface is bulged endlessly over one circumference in the circumferential direction. ing. Further, on the inner peripheral side surface of the container body, an inverted tapered engaging portion in which the inner peripheral side surface is recessed, that is, a recess that linearly expands in diameter from the upper surface opening of the container body toward the bottom surface is endless over one circumference. Is formed in. By fitting these reverse tapers together, the fitting strength between the dish and the container body is increased.

Japanese Unexamined Patent Publication No. 2016-102177

When assembling a food packaging container, it is desirable that the dish portion be easily fitted to the container body. If an even and large force is required to fit the dish into the container body, poor fitting of the dish is likely to occur. As a result, even if the counter-tapered engaging portion is provided on the dish portion side and the container body side, the dish portion that is poorly fitted due to the internal pressure will come off during cooking.

Further, while it is desirable that the dish portion is easily fitted to the container body, it is desirable that the dish portion does not easily come off from the container body during cooking. Therefore, an engaging portion having a reverse taper shape is provided on the dish portion side and the container body side to increase the contact area of the engaging portion. However, depending on the individual food packaging container, providing an engaging portion having an inverted taper shape on the dish side and the container body side causes a situation in which the container body is easily disengaged.

That is, the container body of the food packaging container is obtained by sheet molding in which a expanded polystyrene sheet is sandwiched between molds. At the time of molding, the expanded polystyrene sheet is foamed again. Therefore, in order to accurately match the detailed shape of the container body with the design, highly accurate refoaming control of the expanded polystyrene sheet is required. Further, in order to mass-produce the container body, a plurality of the same molds are prepared. Therefore, in order to accurately match the detailed shape of the container body with the design, dimensional accuracy between molds and mold reproducibility are also important.

If there is a problem in the refoaming control and the mold reproducibility at the time of molding, the depth and the inclination angle of the reverse taper shape of the engaging portion will differ between the individual container bodies. Further, the engaging portion is formed in an endless shape so as to go around the inner peripheral side surface of the container body once, but the depth and the inclination angle of the reverse taper shape may be partially different from the design. On the other hand, solid polypropylene is used for the dish instead of foam. Therefore, it is relatively easy to match the reverse taper shape of the engaging portion of the dish portion with the design with high accuracy over one circumference.

Then, the engaging portion of the container body and the engaging portion of the dish portion do not match accurately on the entire circumference, and there is a possibility that an individual having a reduced fitting strength between the container body and the dish portion may occur. For example, it is assumed that in a part of the engaging portion of the container body, the inclination angle of the reverse taper is gentler than the design, and there is a defective portion having a shallow dent from the inner peripheral side surface of the container body. In the fitting of the reverse tapers, the inclined surfaces rub against each other due to surface contact, but in the defective part, the inclined angle on the container body side and the inclined angle of the dish portion are different, so that the inclined surfaces are in line contact. Because it ends up, it easily floats up.

Further, it is desirable that the dish portion is easily fitted to the container body and that the dish portion does not easily come off from the container body during cooking, but it is further desirable that the dish portion is easily removed from the container body by the user. However, when both the dish portion and the container body engaging portion both have an inverted tapered shape, it is rather difficult to disengage.

Further, when the dish is lifted while being removed, the dish is distorted and deformed so that the detached region is inclined diagonally upward and the non-disengaged region remains flat. Then, while removing the dish, the food on the dish may hit an avalanche and collapse to the side opposite to the range gripped by the user, causing the food to fall from the dish. Therefore, the user needs to carefully remove the dish while changing the gripping area, but since the gripping area and the area where the steam is ejected coincide with each other, there is a risk of causing burns to the user. Therefore, it is difficult for the user to remove the dish from the container body.

The present invention has been proposed to solve the above-mentioned problems of the prior art, and the purpose of the present invention is to easily fit the dish, prevent the dish from coming off during cooking, and depending on the user, the dish. An object of the present invention is to provide a container for food packaging that can be easily removed.

In order to achieve the above object, the container for food packaging according to the embodiment of the present invention has a bottom surface portion and a peripheral wall portion, and has a container body having an open top surface and a bottom surface portion and a peripheral wall portion. The container side includes a dish portion that fits into the internal space of the container body and is supported apart from the bottom surface of the container body, and the container body extends over one circumference on the inner peripheral side surface of the container body. An annular shape that extends endlessly over one circumference in the circumferential direction of the container body at a position higher than the fitting portion and the container-side fitting portion, and extends horizontally outward in the radial direction of the container body. It has a container-side horizontal portion, and the dish portion extends over the outer peripheral side surface of the dish portion over one circumference, and the dish-side fitting portion that fits with the container-side fitting portion and the dish. It has an annular upper rib that extends endlessly over one circumference in the circumferential direction of the dish portion and bulges upward on the horizontal portion on the container side at a position higher than the side fitting portion. It is characterized by that.

The upper rib may be hollow inside and the lower surface may be open.

The dish-side fitting portion includes a first annular bulging portion that extends endlessly over one circumference in the circumferential direction of the dish portion and bulges in a semicircular or trapezoidal shape in a cross-sectional view, and the first annular bulging portion. A second annular bulge that is located below the annular bulge of 1 and extends endlessly over one circumference in the circumferential direction of the dish and bulges in a semicircular or trapezoidal shape in cross section. And an annular groove portion defined by the first annular bulge portion and the second annular bulge portion and extending endlessly over one circumference in the circumferential direction of the dish portion. It may be.

The container body may be made of foam.

The container-side fitting portion may be formed of a recess having a reverse taper shape that linearly expands in diameter toward the lower side.

The upper rib is a narrow region in which the difference between the inner peripheral diameter and the outer peripheral diameter is small in each of the first arc range and the second arc range on the opposite side of the ring center from the first arc range. May have.

The upper rib may have an outwardly inclined inclined surface on the inner peripheral wall of one of the narrow regions.

The dish portion has an annular bottom rib that rises from the bottom surface portion of the dish portion, surrounds the bottom surface portion of the dish portion over one circumference, and extends at a position lower than the dish side fitting portion. You may do so.

A lid portion that closes the internal space of the container body while being fitted to the internal space of the container body is further provided, and the lid portion has an annular lid-side horizontal portion whose lower surface is in contact with or close to the upper surface of the upper rib. You may have it.

A lid portion that closes the internal space of the container body may be further provided while being fitted into the internal space of the container body.

A film that closes the upper surface opening of the container body may be further provided.

According to the present invention, the dish portion is easy to fit when it is fitted into the container body, and even if there is a defective portion in the recess, it is difficult to remove during cooking, and it is easy to remove it after cooking.

It is an overall sectional view of the food packaging container which shows the separated state. It is an overall sectional view of the container for food packaging which shows the combined state. It is sectional drawing of the peripheral wall part which shows the detailed shape of a container body. It is a side view of the peripheral wall part which shows the detailed shape of a dish part. It is sectional drawing of the peripheral wall part which shows the detailed shape of a dish part. It is a top view of the dish part. It is sectional drawing of the peripheral wall part which shows the detailed shape of a lid. It is sectional drawing which shows the engaging state of the container body, the dish part, and the peripheral wall part of a lid in relation to the combined state. It is a figure which shows how the force which tries to roll up the upper rib of a dish part from the inside, and the drag action on the outer edge of the upper rib against the force. (A) is a schematic view showing a state in which a part of the protruding portion is detached, and (b) is a schematic view showing a state in which a part of the bulging portion that bulges once in an endless manner is detached. It is a side view of another example of the peripheral wall part which shows the detailed shape of a dish part. It is sectional drawing of another example of the peripheral wall part which shows the detailed shape of a dish part. It is sectional drawing which shows the dish side fitting part which concerns on another example in the tilted food packaging container.

The food packaging container according to the embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, the thickness, dimensions, positional relationship, ratio, etc. are emphasized for easy understanding. The bottom side of the food packaging container is referred to as the lower side or the lower side, and the top surface side of the lid is referred to as the upper side or the upper side.

(Food packaging container)
FIG. 1 is a view showing a separated state of the food packaging container 100, in which the left side is a side view and the right side is a cross-sectional view of the dish portion. FIG. 2 is a view showing a united state of the food packaging container 100, in which the left side is a cross-sectional view and the right side is a side view of the dish portion. As shown in FIGS. 1 and 2, the food packaging container 100 includes a container body 1, a dish portion 2, and a lid 3. The container body 1, the dish 2 and the lid 3 are separate bodies, and are detachably combined into one by fitting to form a food packaging container 100.

The container body 1 is a bowl type with a top opening. The container body 1 includes a bottom surface portion 11 and a peripheral wall portion 12 that is continuous endlessly along the edge of the bottom surface portion 11. The bottom surface portion 11 is circular in a plan view. The mouth edge 13 of the container body 1 is an annular shape having a diameter larger than that of the bottom surface portion 11. That is, the peripheral wall portion 12 rises from the bottom surface portion 11 toward the top surface opening while gradually increasing the diameter as a whole. The dish portion 2 has a diameter smaller than that of the mouth edge 13 of the container body 1 and a diameter smaller than that of the outer circumference of the lid 3, and has a disc shape with a shallow bottom. The dish portion 2 includes a bottom surface portion 21 and a peripheral wall portion 22. The bottom surface portion 21 is circular in a plan view as a whole. The peripheral wall portion 22 stands up continuously along the edge of the bottom surface portion 21 in an endless manner. The lid 3 has a dome portion 31 whose top surface is flattened.

The dish portion 2 is pushed into the internal space through the upper opening of the container body 1. The pushed-in dish portion 2 is internally fitted to the inner peripheral side surface of the container body 1 at a height at which the diameter of the dish portion 2 and the diameter of the container body 1 match. The height at which the diameter of the dish portion 2 and the diameter of the container body 1 match is higher than the total height of the dish portion 2. Therefore, the dish portion 2 is separated from the bottom surface portion 11 of the container body 1 and is hollowly supported in the inner space of the container body 1. The lid 3 is pushed into the internal space through the upper opening of the container body 1 after the dish portion 2 is internally fitted. The pushed lid 3 covers the dish portion 2 and is internally fitted with the container body 1 at a height at which the diameter of the dish 3 and the diameter of the container body 1 match, and the container body 1 is closed.

In a state where the container body 1, the dish 2 and the lid 3 are united, the dish 2 is supported apart from the bottom surface 11 of the container body 1. The internal space of the container body 1 is divided into two upper and lower regions, an upper internal space 101 and a lower internal space 102, by the dish portion 2. The food packaging container 100 can store food separately in the upper internal space 101 and the lower internal space 102. The food packaging container 100 is suitable when it is desired to cook food in a microwave oven with the lid closed while separating the food on the dish 2 and the bottom surface 11 of the container body 1. For example, the lower internal space 102 accommodates soup or the like that is liquid or hardened with gelatin or the like, and the upper internal space 101 contains noodles or ingredients.

(Container body)
The container body 1 will be described in more detail. FIG. 3 is a cross-sectional view showing a detailed shape of the container body 1. A lower fitting portion 14 that engages with the dish portion 2 and an upper fitting portion 15 that engages with the lid 3 are formed on the inner peripheral side surface of the container body 1. The lower fitting portion 14 is formed on the bottom surface portion 11 side, that is, at a lower position than the upper fitting portion 15, and the upper fitting portion 15 is relatively closer to the mouth edge 13 than the lower fitting portion 14. That is, it is formed at a high position.

The lower fitting portion 14 extends on the inner peripheral side surface of the container body 1 in an endless manner while maintaining the same height over one circumference. The lower fitting portion 14 has a recess 141, a lower step portion 142, and a container-side horizontal portion 143. A lower step portion 142 is formed on the lower side directly connected to the recess 141, and a container-side horizontal portion 143 is formed on the upper side directly connected to the recess 141.

The recess 141 is a recess formed on the inner peripheral side surface of the container body 1. The recess 141 extends on the inner peripheral side surface of the container body 1 in an endless manner while maintaining the same height over one circumference. Further, the recess 141 has an inverted tapered shape. That is, the inner peripheral side surface of the container body 1 linearly expands the diameter of the recess 141 from the upper surface opening of the container body 1 toward the bottom surface portion 11. The lower step portion 142 has an endless shape extending the inner peripheral side surface of the container body 1 over one circumference at the same height, and bulges toward the internal space side of the container body 1 from the lower end of the recess 141. .. The container-side horizontal portion 143 extends horizontally from the upper end of the recess 141 to the outside along the radial direction of the container body 1 and has a constant height.

In other words, the peripheral wall portion 12 rises from the bottom surface portion 11 while expanding its diameter, and then is provided with a lower step portion 142 by smoothly increasing the degree of diameter expansion, and upwards from the upper end of the lower step portion 142 as a base point. The recess 141 is provided by reducing the diameter toward the container, and the container-side horizontal portion 143 is provided by extending horizontally from the upper end of the recess 141 as a base point.

The upper fitting portion 15 includes a recess 151 and an upper step portion 152. The upper step portion 152 is formed in the outer peripheral side region of the container-side horizontal portion 143 of the lower fitting portion 14, and the recess 151 is directly connected to the upper step portion 152 and is formed on the upper side.

The recess 151 is a recess formed on the inner peripheral side surface of the container body 1. The recess 151 extends on the inner peripheral side surface of the container body 1 in an endless manner while maintaining the same height over one circumference. Further, the recess 151 has an inverted tapered shape. That is, the inner peripheral side surface of the peripheral wall portion 12 linearly expands the diameter of the recess 151 from the upper surface opening of the container body 1 toward the bottom surface portion 11. The upper step portion 152 is a region that is one step higher than the container-side horizontal portion 143, and is formed directly below the recess 151. The upper step portion 152 has an endless shape extending from the inner peripheral side surface of the container body 1 over one circumference at the same height, and bulges toward the internal space side of the container body 1 from the lower end of the recess 151. There is.

In other words, the peripheral wall portion 12 is provided with the upper step portion 152 by raising the outer edge of the container-side horizontal portion 143 of the lower fitting portion 14 by one step higher, and the outer edge of the upper step portion 152 is directed upward from the outer edge. By reducing the diameter, the recess 151 is provided. Then, the peripheral wall portion 12 is further raised from the upper end of the recess 151, and is provided with a mouth edge 13 at the rising destination.

The rim 13 has an upward convex bead shape in which the upper end of the peripheral wall portion 12 is curved outward from the container body 1. The outer edge of the mouth edge 13 includes a edging portion 131 extending outward in the radial direction of the container body 1. The edging portion 131 reinforces the strength of the rim 13.

Such a container body 1 is manufactured by sheet molding in which a expanded polystyrene sheet is sandwiched between molds. The expanded polystyrene sheet is softened by heating during molding, and is formed into the container body 1 while being foamed again when sandwiched between molds. The material of the container body 1 is not limited to expanded polystyrene as long as it is a foam. The mold that forms the inner surface shape of the container body 1 has a lower flange portion and an upper flange portion that form a recess 141 of the lower fitting portion 14 and a recess 151 of the upper fitting portion 15. Both the lower flange portion and the upper flange portion have an inverted tapered shape, and the diameter is linearly expanded from the upper surface opening of the container body 1 toward the bottom surface portion 11.

Depending on the dimensional accuracy and mold reproducibility of a plurality of molds for producing the same type of container body 1, the sheet storage condition of the expanded polystyrene sheet, the expanded state at the time of molding, or both of these, the lower fitting portion 14 The recess 141 of the upper fitting portion 15, the recess 151 of the upper fitting portion 15, or both of them does not have a reverse taper having a desired inclination angle or has a desired deepest portion in the entire range or a part of the circumference. It may not be tapered, or it may have a tapered shape in which the diameter is reduced from the upper surface opening of the container body 1 toward the bottom surface portion 11, and the diameter may protrude from the inner peripheral side surface of the container body 1 into the inner space. Hereinafter, the range of the recess 141 standing on the vertical side of the desired inclination angle and the range of the recess 141 shallower than the desired deepest portion are referred to as defective portions.

(Dish part)
Next, the dish portion 2 will be described in more detail. FIG. 4 is a side view of the peripheral wall portion showing the detailed shape of the dish, FIG. 5 is a cross-sectional view of the peripheral wall portion showing the detailed shape of the dish, and FIG. 6 is a plan view of the dish portion 2. The dish portion 2 is manufactured, for example, by sheet molding in which a solid polypropylene sheet is sandwiched between molds.

By sheet molding, the peripheral wall portion 22 of the dish portion 2 rises endlessly from the peripheral edge of the bottom surface portion 21 having a circular shape in a plan view from the bottom surface portion 21 to the end portion of the peripheral wall portion 22, and is radially in the middle. A step portion 231 extending horizontally is formed along the above. The step portion 231 rises steeper than the rising angle of the peripheral wall portion 12 below the lower fitting portion 14 of the container body 1. The boundary between the step portion 231 and the bottom surface portion 21 is rounded to form a chamfered portion 232. Further, the peripheral wall portion 22 is formed with a vertical portion 233 that rises by rapidly changing the inclination angle in the vertical direction from the horizontal plane of the step portion 231. Further, the peripheral wall portion 22 is formed with a dish-side horizontal portion 234 extending horizontally along the radial direction.

The step portion 231 of the dish portion 2 serves as a bottom rib 25. The bottom rib 25 is an annular shape formed on the outer peripheral surface of the bottom surface 21 at the same height and in an endless shape over one circumference. The bottom rib 25 has a predetermined thickness in the vertical direction, a predetermined width in the horizontal direction, and bulges toward the inner peripheral side of the dish portion 2. The inner peripheral diameter of the bottom rib 25 is determined so that the chamfered portion 232 comes into contact with the inner peripheral side surface of the container main body 1 when the dish portion 2 is internally fitted with the container main body 1. The bottom rib 25 suppresses the deformation of the bottom surface 21 from spreading to the shape above the bottom rib 25. The bottom surface portion 21 is deformed into a dome shape that bulges upward due to an increase in pressure in the lower internal space 102. The pressure increase is caused by cooking the food packaging container 1 in a microwave oven.

A dish side fitting portion 26 is formed in the vertical portion 233 which is directly connected to the bottom side rib 25 and is formed on the upper side. The dish-side fitting portion 26 is formed on the outer peripheral surface side of the peripheral wall portion 22, and engages with the lower fitting portion 14 of the container body 1. The dish-side fitting portion 26 has a protrusion 261 and an annular bulge 262. The protrusion 261 is arranged in the lower region of the vertical portion 233, and the annular bulge 262 is arranged in the upper region of the vertical portion 233. That is, the protrusion 261 faces the position where the recess of the reverse-tapered recess 141 is deep, and the annular bulge 262 faces the position where the recess of the reverse-tapered recess 141 is shallow. The protrusion 261 fits into the recess 141 of the lower fitting portion 14. The annular bulging portion 262 is in close contact with the upper region of the recess 141 of the lower fitting portion 14.

The protrusion 261 protrudes from the vertical portion 233 to the outside of the dish portion 2, and has a circumferential length sufficiently shorter than the circumferential length of the dish portion 2, such as a dot shape. The protrusion 261 is, for example, a hemispherical bulge. The hemisphere includes a bulge with a central angle of less than 180 degrees and an elliptical bulge. A plurality of the protrusions 261 are formed. The plurality of protrusions 261 are arranged on the outer peripheral side surface of the dish portion 2 while maintaining the same height position over one circumference. The protrusions 261 are arranged at equidistant positions on the circumference with a space between them. The shape and dimensions of each protrusion 261 are the same.

The annular bulging portion 262 has an annular shape in which the outer peripheral side surface of the dish portion 2 is maintained at the same height over one circumference and extends in an endless manner, and is a semicircle in a cross-sectional view along the vertical direction. It has a shape or trapezoidal shape. The vertical length and the horizontal width of the annular bulge 262 are uniform.

The upper dish-side horizontal portion 234 directly connected to the dish-side fitting portion 26 is a flange portion 27 that sits on the container-side horizontal portion 143 of the lower fitting portion 14. An upper rib 28 is formed on the upper surface of the flange portion 27. The upper rib 28 has an annular shape that extends in an endless manner over one circumference along the annular extension of the flange portion 27. The upper rib 28 suppresses a force that tends to deform the dish side fitting portion 26.

Further, the upper rib 28 has an annular opening 283 on the lower surface over the entire circumference and a storage space 284 inside, and is a rectangle surrounded by three sides without a lower side in a cross-sectional view along the vertical direction. Has a shape. That is, in detail, the horizontal portion 234 on the dish side of the dish portion 2 extends horizontally from the upper end of the vertical portion 233, then bends in the middle and rises vertically, and is perpendicular to the outside in the radial direction of the dish portion 2. It bends to extend horizontally, bends vertically from the horizontal to the dish portion 2 and extends vertically downward, and returns to a direction extending horizontally at the same height as the horizontal starting from the upper end of the vertical portion 233.

The upper rib 28 is erected so as to leave the outer peripheral region of the flange portion 27 over the entire circumference. That is, the outermost diameter of the flange portion 27 is larger than the outermost diameter of the upper rib 28. The upper rib 28 is not the same in width over one circumference and has a narrow region 281. The narrow width region 281 is a range in which the width of the upper surface flat region is narrower than the other arc ranges of the upper rib 28, that is, a range in which the difference between the inner peripheral diameter and the outer peripheral diameter is small. The narrow region 281 extends to a first arc range that is a part of the upper rib 28 and a second arc range on the opposite side of the partial range with the ring center interposed therebetween. An inclined surface 282 having an inner peripheral wall inclined outward in the radial direction is formed in one of the narrow regions 281. The inclined surface 282 serves as a sliding port when the food is taken out from the dish portion 2.

Further, following the inclined surface 282, an inclined surface 211 that is inclined toward the inclined surface 282 is inclined on the upper surface of the bottom surface portion 21. The food slides on the inclined surface 211 toward the upper rib 28, slides on the inclined surface 282, and slides down to the outside of the dish portion 2.

Of the outer peripheral edge of the flange portion 27, the tongue piece portion 29 extends from the range in which the other narrow region 281 extends. The tongue piece portion 29 is formed within the range of the narrow region 281 opposite to the narrow region 281 on which the inclined surface 282 is formed. The tongue piece portion 29 is an elongated plate piece extending from the outer peripheral side of the upper rib 28, and is gripped when the dish portion 2 is removed from the container body 1. At the base end of the tongue piece portion 29, a concave annular rib 291 recessed downward and a convex annular rib 292 bulging upward are formed (see FIG. 1). The concave annular rib 291 and the convex annular rib 292 are connected to each other, and the concave annular rib 291 is located closer to the proximal end side of the tongue piece portion 291 than the convex annular rib 292. When the tongue piece portion 29 is gripped, a bending force is applied to the concave annular rib 291 to facilitate bending of the tongue piece portion 29. However, when the convex annular rib 292 is connected to the outside, the bending force is reduced to the concave annular rib. It becomes easy to join 291.

(lid)
FIG. 7 is a cross-sectional view of the lid 3. The center of the top surface of the dome portion 31 is flat, and the dome portion 31 hangs down while expanding its diameter downward outside the flat region. At the lower end of the hanging dome portion 31 of the lid 3, a lid-side horizontal portion 32 extending horizontally outward in the radial direction is extended. A convex portion 33 stands up on the outer edge of the horizontal portion 32. A flange portion 34 extending horizontally outward in the radial direction is further extended to the upper end of the convex portion 33.

The diameter range from the inner circumference to the outer circumference of the lid-side horizontal portion 32 and the diameter range from the inner circumference to the outer circumference of the upper rib 28 partially or completely overlap. When the dish portion 2 and the lid 3 are attached to the container body 1, the lid side horizontal portion 32 and the upper rib 28 have the lower surface of the lid side horizontal portion 32 in contact with the upper surface of the upper rib 28, or the lid side horizontal portion 32 and the lid side horizontal portion 32. The upper rib 28 and the upper rib 28 are close to each other with a slight gap. The convex portion 33 has a tapered portion 331 connected to the outer edge of the lid-side horizontal portion 32, and further has a reverse tapered portion 332 continuously from the upper end of the tapered portion 331. The diameter of the tapered portion 331 is linearly reduced from the upper side to the lower side, and the diameter of the reverse tapered portion 332 is linearly increased from the upper side to the lower side.

(Action)
(At the time of assembly)
The assembly of the food packaging container 100 having the container body 1, the dish 2 and the lid 3 will be described with reference to FIG. First, food is placed on the upper surface of the bottom surface portion 11 of the container body 1. Then, the dish portion 2 is pushed into the internal space of the container body 1 from the bottom surface portion 21 side. The pressing force for pushing the dish portion 2 is applied to the upper surface of the upper rib 28 having high strength. Therefore, since the pressing force is not evenly applied to the entire circumference, the upper rib 28 maintains the flatness even if the pressing force distribution is uneven. Therefore, when the dish portion 2 is pushed into the container body 1, a part of the dish portion 2 is prevented from being distorted so as to warp. As a result, the dish portion 2 is easily pushed into the internal space of the container body 1 by the upper rib 28. When the inner fitting of the dish portion 2 with respect to the container body 1 is completed, the food is placed on the bottom surface portion 21 of the dish portion 2. After that, the lid 3 is pushed into the internal space of the container body 1.

The recess 141 of the lower fitting portion 14 is formed at a position facing the protrusion 261. In the process of pushing the dish portion 2 into the internal space of the container body 1, each protrusion 261 of the dish side fitting portion 26 is fitted into the recess 141 of the lower fitting portion 14. Hereinafter, unlike the present embodiment, a bulging portion that is formed endlessly on the outer peripheral surface of the dish portion in the circumferential direction and is fitted into the recess 141, or a dish portion having this bulging portion is to be compared. That is.

The protrusions 261 are independent and not connected to each other, and the contact area between the protrusions 261 and the recesses 141 is small. Therefore, the pressing force for fitting one protrusion 261 into the recess 141 can be small. Further, there is a gap between the protrusions 261 that does not fit with the recess 141. Therefore, the total fitting distance between the total protrusions 261 and the recesses 141 is shorter than that of the comparison target. As a result, the total pressing force for fitting the total protrusions 261 into the recesses 141 can be reduced. Therefore, the protrusion 261 makes it easy to fit the dish portion 2 into the container body 1.

Further, even if a defective portion exists in the concave portion 141, the protruding portion 261 does not come into contact with all of the defective portions. Therefore, the pressing force for fitting the protrusion 261 into the defective portion can be relatively small. Therefore, the protrusion 261 makes it easy to fit the dish portion 2 into the container body 1 regardless of the presence of the defective portion. On the other hand, the comparison target comes into contact with the entire defective portion. Therefore, in the comparison target, it is necessary to apply a large pressing force to the portion corresponding to the defective portion. The uneven distribution of the pressing force with respect to the dish portion 2 causes the dish portion to rise with the defective portion as a fulcrum. As a countermeasure, it is necessary to apply an even pressing force to the dish portion in anticipation of the pressing force to be fitted to the defective portion. As described above, it is difficult to fit the dish portion into the container body 1 in the comparison target.

Focusing on other than the protrusion 261, in the process of pushing the dish 2 into the internal space of the container body 1, the annular bulge 262 of the dish side fitting 26 abuts against the upper region of the recess 141 and comes into close contact with it. The lower end of the vertical portion 233 is caught by the lower step portion 142 of the lower engaging portion 14. The flange portion 27 is seated on the container-side horizontal portion 143 of the lower engaging portion 14, and the lower surface of the flange portion 27 and the upper surface of the container-side horizontal portion 143 are in full contact with each other. The upper rib 28 formed on the flange portion 27 is also placed on the container-side horizontal portion 143 over the entire circumference. Further, the chamfered portion 232 at the boundary between the bottom surface portion 21 and the bottom side rib 25 contacts the inner peripheral side surface of the container body 1.

Further, in the process of pushing the lid 3, the convex portion 33 is fitted into the concave portion 151 provided in the upper fitting portion 15 of the container body 1. The flange portion 34 of the lid 3 rides on the mouth edge 13 of the container body 1. The horizontal portion 32 of the lid 3 is in contact with the upper surface of the upper rib 28 of the dish portion 2 or is in close proximity to the upper surface of the upper rib 28.

(During cooking)
The user puts the food packaging container 100 containing the food in a microwave oven and heats it. Foods such as soup are often stored in the lower internal space 102. Foods such as soup tend to get hot, and the pressure of the lower internal space 102 tends to rise more than that of the upper internal space 101. That is, in the process of cooking, the internal pressure of the lower internal space 102 becomes relatively high, and this internal pressure tends to push up the dish portion 2.

The dish portion 2 is fixed to the inner peripheral side surface of the container main body 1 by the peripheral wall portion 22 by fitting the lower fitting portion 14 and the dish side fitting portion 26. As a result, the internal pressure first causes the bottom surface portion 21 of the dish portion 2 to bulge in a hemispherical shape. Bottom side ribs 25 are arranged on the outer peripheral side surface of the bottom surface portion 21 over one circumference. The bottom rib 25 has a higher strength than the bottom portion 21. Therefore, the bottom rib 25 is not distorted and deformed at an internal pressure that causes the bottom surface 21 to bulge. The dish-side fitting portion 26 is above the bottom-side rib 25. Therefore, the bottom rib 25 prevents the deformation of the bottom surface 21 from spreading to the dish-side fitting portion 26, and makes it difficult for the force to release the fitting between the recess 141 and the protrusion 261 to be exerted. That is, the bottom rib 25 makes it difficult for the dish portion 2 to come off during cooking.

As the cooking progresses, the internal pressure further increases. The dish portion 2 is fixed to the inner peripheral side surface of the container body 1 by the lower fitting portion 14, and the bottom rib 25 protects the lower fitting portion 14. Further, the bottom surface portion 21 is hemispherically bulged. Therefore, the pushing force acting on the dish portion 2 by the internal pressure includes a component that radiates from the center of the dish portion 2 toward the outer circumference and is obliquely upward.

As shown in FIG. 9, this pushing force tends to roll up the upper rib 28 from the inner peripheral side. The entire circumference of the lower end of the outer edge of the upper rib 28 is pressed against the container-side horizontal portion 143 of the lower fitting portion 14 by this pushing force. As a result, the force for rolling up the upper rib 28 from the inner peripheral surface side is diminished by the reaction force received from the container side horizontal portion 143, and the upper rib 28 is flat against the rolling up from the inner peripheral side. Maintain a good condition. Then, the dish-side fitting portion 26 is also supported by the upper rib 28 and is not distorted and deformed, and the protrusion 261 is unlikely to come off from the recess 141 of the lower fitting portion 14.

Further, the protrusions 261 and the recesses 141 do not match in shape, and the individual areas of the protrusions 261 are small. Therefore, each protrusion 261 is pressed against the recess 141 and sinks into the inclined surface of the recess 141. As a result, the inclined surface of the recess 141 has a shape that matches the protrusion 261. The protrusions 261 and the recesses 141 are in good surface contact with each other due to the recessing, and the fitting strength of the protrusions 261 is increased. Therefore, even if the internal pressure becomes higher and the force starts to be applied to the dish-side fitting portion 25, the protrusion 261 is unlikely to come off from the recess 141 of the lower fitting portion 14.

Moreover, since the protrusion 261 has a spherical surface, surface contact can be made with a fixed area even with a defective portion. Therefore, the protrusion 261 is difficult to come off from the recess 141 of the lower fitting portion 14 even due to the presence of the defective portion. On the other hand, it is assumed that the bulging mode to be compared is an inverted taper shape that follows the shape and dimensions of the recess 141. In this case, in the defective portion, the inclination angles of the concave portion 141 and the comparison target do not match, the comparison target and the concave portion 141 approach line contact, and the contact area is significantly reduced. That is, in the defective portion, the static friction with respect to the comparison target becomes small. Therefore, due to the further increased internal pressure, the comparison target easily slides up the inclined surface of the recess 141 and comes off from the recess 141.

Further, each protrusion 261 is independent and is not connected. Therefore, as shown in FIG. 10 (a), even if a part of the protrusions 261 loses the internal pressure and comes off from the recess 141, the protrusions 261 on both sides are attached to the detached protrusions 261. The risk of being dragged off is reduced, and the range of the protruding protrusion 261 and the protruding protrusion 261 that is about to come off is within a narrow range. Therefore, the protrusion 261 makes it difficult for the dish 2 to come off during cooking.

On the other hand, as shown in FIG. 10B, when the bulging portion 500 to be compared is separated from the defective portion 141a, the bulging portion 500 that fits in a good fixed range on both sides of the defective portion 141a , It is dragged upward and falls into insufficient fitting with the recess 141. Therefore, the bulging portion 500 is almost removed from the recess 141 even in a good fixed range on both sides of the defective portion 141a, and the range in which the bulging portion 500 is removed extends over a wide range. Moreover, since the bulging portions 500 are linked in an endless manner, each range deviates from the Imozuru formula, and as a result, as soon as the bulging portion 500 to be compared is removed from the defective portion 141a, all the bulges The protruding portion comes off from the concave portion 141, and the dish portion 2 easily comes off during cooking.

In the first place, the upper rib 28 extends above the protrusion 261 that is about to come off from the recess 141. If there is no upper rib 28, if a part of the protrusions 261 comes off from the recesses 141, the protrusions 261 around the protrusions 261 maintain the fitting with the recesses 141, so that the dish portion 2 is from the recesses 141. It will be distorted and deformed so that a mountain is completed with the detached protrusion 261 as the apex. However, since the upper rib 28 that suppresses the distortion deformation of the dish portion 2 extends above the protrusion 261, the dish portion 2 is less likely to be distorted and deformed, and therefore the protrusion 261 is also less likely to come off from the recess 141. ing.

Further, the upper rib 28 is pressed by the lid side horizontal portion 32 of the lid portion 3. When the lid-side horizontal portion 32 and the upper rib 28 are close to each other, if the dish portion 2 is slightly lifted, the lid-side horizontal portion 32 presses the upper rib 28. Therefore, the upper rib 28 is less likely to be distorted and deformed, the dish portion 2 is also less likely to be distorted and deformed, and the protrusion 261 is also less likely to come off from the recess 141.

(After cooking)
After the heating by the microwave oven is completed, the user takes out the food packaging container 100 containing the warm food from the microwave oven. It is assumed that the user has tilted the food packaging container 100 when removing it from the microwave oven. The liquid such as soup contained in the container body 1 flows through the peripheral wall portion 12 of the container body 1 and tends to leak to the dish portion 2 side. However, the chamfered portion 232 is in contact with the inner peripheral side surface of the container body 1, and the passage toward the liquid dish portion 2 is blocked. Therefore, the possibility that the liquid leaks to the dish portion 2 side is reduced.

When the tilt angle of the food packaging container 100 is large, the liquid that cannot be prevented by the chamfered portion 232 goes to the region where the protrusions 261 are arranged side by side. This liquid further advances to the dish portion 2 side through the gap between the adjacent protrusions 261. However, an annular bulge 262 is arranged above the protrusion 261. The annular bulging portion 262 is in close contact with the recess 141 of the lower fitting portion 14 of the container body 1. That is, the passage toward the liquid dish portion 2 is blocked by the annular bulging portion 262, and the liquid leaks to the dish portion 2 side even when the tilt angle of the food packaging container 100 is large. The risk of

When the tilt angle of the food packaging container 100 is further large and the liquid passes through the annular bulging portion 262, the liquid enters between the flange portion 27 and the container side horizontal portion 143 and enters from the outer edge of the dish side horizontal portion 234. Attempts to leak to the plate 2. However, the upper rib 28 is arranged on the flange portion 27. The upper rib 28 has an opening 283 on the lower surface. Therefore, the liquid passing between the flange portion 27 and the dish-side horizontal portion 234 is sucked up from the opening 283 of the upper rib 28 into the storage space 284 of the upper rib 28 and stored in the upper rib 28. Therefore, even when the tilt angle of the food packaging container 100 is further large, the risk of liquid leaking to the dish portion 2 side is reduced.

After taking out the food packaging container 100 from the microwave oven, the user first applies force to the lid 3 to remove it from the container body 1. Next, the tongue piece portion 29 is grasped, and the dish portion 2 is lifted upward from one side.

At this time, for the comparison target, the total of both the force of removing the recess 141 from a part of the bulging portion and the force of pulling up the ranges on both sides of the range to be removed in order to create a trigger for the dish portion 2 to come off. Is required, so a great deal of power is required first. After the trigger is created, it will be out of the Imozuru formula, so the force will be less than the initial force. Then, the dish portion 2 may come off vigorously due to a large force for creating a trigger for removal, and the food on the dish portion 2 may pop out.

However, since the protrusions 261 may be removed from the recesses 141 one by one in order, the user may continue to apply a certain force. Therefore, the dish portion 2 is gently disengaged, and the possibility that the food on the dish portion 2 pops out is suppressed. Further, since the dish portion 2 is less likely to be distorted by the upper rib 28, the total protrusion 261 can be removed at once. Then, the steam in the container body 1 rises from a wide range such as a half-circumferential range or a full-circumferential range. Therefore, it is possible to prevent the steam in the container body 1 from concentrating on the hand and locally overflowing, and it is possible to reduce the risk of causing burns to the user.

Further, even if a force for lifting the dish portion 2 is applied only to the tongue piece portion 29, the dish portion 2 is less likely to be distorted and deformed by the upper rib 28. Therefore, during the removal of the dish portion 2, the food on the dish portion 2 hits an avalanche and collapses to the side opposite to the tongue piece portion 29, suppressing the possibility that the food falls from the dish portion 2. After removing the dish portion 2 from the container body 1, the food on the dish portion 2 is moved to the container body 1 side and mixed to complete the cooking.

When the food on the dish 2 is transferred to the container body 1, the dish 2 is U-shaped with a line segment passing through both the narrow region 281 of the upper rib 28 and the annular center of the upper rib 28 as the center. Alternatively, it is bent into a V shape to form a food outlet. Therefore, the food can be transferred from the dish 2 to the container body 1 without spilling. When the food is slid down from the dish 2 from the sliding opening, since the inclined surface 282 exists in the narrow region 281, the narrow region 281 does not serve as a barrier and the food slides down smoothly.

(effect)
As described above, the food packaging container 100 is provided with at least a container body 1 and a dish portion 2. The container body 1 has a bottom surface portion 11 and a peripheral wall portion 12, and the upper surface thereof is open. The dish portion 2 has a bottom surface portion 21 and a peripheral wall portion 22, is fitted to the inner peripheral side surface of the container body 1, and is supported apart from the bottom surface portion 11 of the container body 1. The dish portion 2 is provided with a plurality of protrusions 261 arranged on the outer peripheral side surface of the dish portion 2 so as to be arranged with a space between adjacent ones over one circumference in the circumferential direction. The container body 1 is formed at a position facing the protrusion 261 on the inner peripheral side surface of the container body 1 so as to have a recess 141 into which the protrusion 261 fits. As a result, the dish portion 2 is easy to fit when fitting into the container body 1, and even if there is a defective portion in the recess 141, it is difficult to remove during cooking, and it is easy to remove when removing after cooking.

In addition, in that it is possible to prevent the other protrusions 261 from being dragged and detached from the protrusions 261 that are detached from the defective portion, the protrusions 261 extend one by one at a short distance in the circumferential direction, and as a whole. As a result, they may be lined up one lap with a space between them. Therefore, the protrusion 261 is not limited to a hemisphere, and may have a shape such as a triangle, a rectangle, a polygon, or an oval when viewed toward the vertical portion 233, and is not a curved bulge. , Trapezoidal, polygonal or triangular. Further, the recesses 141 do not have to be endless over one circumference, and a plurality of recesses 141 are arranged so as to include the protrusions 261 one by one or a predetermined number of protrusions 261 by one. You may do so.

However, since the protrusion 261 bulges hemispherically, it can be fitted to the recess 141 in a certain area regardless of the shape and size of the defective portion of the recess 141, and the difficulty of coming off during cooking is improved. At the same time, regardless of the instability of the shape of the recess 141, the difficulty of coming off is unified among the individuals of the food packaging container 100.

Further, the dish portion 2 extends endlessly over one circumference in the circumferential direction on the outer peripheral side surface of the dish portion 2 and at a position higher than the protrusion 261 and swells in a semicircular or trapezoidal shape in a cross-sectional view. It has an annular bulge 262 to be ejected. The annular bulging portion 262 is in close contact with the inner surface of the recess 141 of the container body 1. As a result, even if the liquid in the lower internal space 101 leaks from the gap formed between the protrusions 261 but the annular bulge 262 blocks the path to the dish 2, the liquid leaks to the dish 2. It can be suppressed. The annular bulging portion 262 may be in close contact with the container body 1 to block the liquid path, and the contact destination does not have to be the recess 141. That is, another recess on the inner peripheral side surface of the container body 1 may be formed so as to be brought into close contact with the other recess.

The dish portion 2 rises from the bottom surface portion 21 of the dish portion 2, surrounds the bottom surface portion 21 of the dish portion 2 over one circumference, and has an annular bottom rib 25 extending at a position lower than the protrusion 261. To have. The bottom rib 25 has no engagement relationship with the container body 1. As a result, it becomes difficult for the force for removing the dish portion 2 to be applied to the protrusion 261, and the dish portion 2 becomes more difficult to remove during cooking.

The protrusions 261 do not all have to have the same width. For example, two types of short-width protrusions 261 and long-width protrusions 261 may be arranged side by side, and short-width protrusions 261 and long-width protrusions 261 may be arranged alternately. The length of the short-width protrusion 261 along the circumferential direction of the dish portion 2 is shorter than that of the long-width protrusion 261 and is relatively easy to come off from the recess 141. The length of the long-width protrusion 261 along the circumferential direction of the dish portion 2 is longer than that of the short-width protrusion 261 and is relatively difficult to come off from the recess 141. The height of the protrusion 261 is easier to adjust as compared with the case where the bulge that fits into the recess 141 is endless in the circumferential direction, and the short-width protrusion 261 and the long-width protrusion 261 are formed. Since it is possible to adjust the fitting strength as a whole by arranging the two types alternately, it is possible to finely adjust the fitting strength between the dish portion 2 and the container body 1.

Further, the container body 1 extends in an endless manner over one circumference in the circumferential direction of the container body 1 at a position higher than the recess 141, and extends horizontally outward in the radial direction of the container body 1 on the annular container side. A horizontal portion 143 is provided, and the dish portion 2 extends at a position higher than the protrusion 261 in an endless manner over one circumference in the circumferential direction of the dish portion 2, and is placed on the container-side horizontal portion 143 and bulges upward. An annular upper rib 28 to be ejected is provided. Even with this, the dish portion 2 is easy to fit when fitting into the container body 1, and even if there is a defective portion in the recess 141, it is difficult to remove during cooking, and it is easy to remove when removing after cooking.

Further, the upper rib 28 is hollow inside and the lower surface is open. As a result, the liquid that is about to leak from the lower internal space 102 to the dish portion 2 side is stored in the upper rib 28, so that the liquid can be suppressed from leaking to the dish portion 2 side.

Further, the upper rib 28 has a width in which the difference between the inner peripheral diameter and the outer peripheral diameter is small in each of the first arc range and the second arc range on the opposite side of the ring center from the first arc range. It was made to have a narrow region 281. As a result, the user can fold the dish portion 2 into a U-shape or a V-shape with a line segment passing through the pair of narrow regions 281 so that the food can be transferred to the container body 1 without spilling.

Further, the upper rib 28 has an inclined surface 282 inclined outward on the inner peripheral wall of one narrow region 281. As a result, the food can easily ride on the upper rib 28 and can be transferred to the container body 1 without spilling the food.

Further, a lid 3 for closing the internal space of the container body 1 while being fitted to the internal space of the container body 1 is further provided, and the lower surface of the lid 3 is an annular lid side in contact with or close to the upper surface of the upper rib 28. It has a horizontal portion 33. As a result, the counterforce against the change in strain of the upper rib 28 can be strengthened, and the dish portion 2 is less likely to come off during cooking even if there is a defective portion in the recess 141.

However, in the present embodiment, the food packaging container 100 is provided with the lid 3, but since the dish portion 2 is difficult to remove, the lid 3 is unnecessary, and a film is placed on the upper surface opening of the container body 1 to cover the upper surface. The opening may be closed.

In the present embodiment, the protrusion 261 is provided as the shape of the dish-side fitting portion 26 that extends over the outer peripheral side surface of the dish portion 2 and fits with the lower fitting portion 14 on the container body 1 side. Although the upper rib 28 is provided, the upper rib 28 makes it easy for the dish portion 2 to come off by a function of suppressing the strain deformation of the dish portion 2, and any known shape can be applied to the dish side fitting portion 26. That is, the dish-side fitting portion 26 is provided with, for example, a bulging portion that maintains the same height over one circumference of the inner peripheral side surface and extends in an endless manner in order to fit with the recess 141. You may. The shape of the bulge may also be inverted tapered, rectangular, trapezoidal or semicircular in cross section along the vertical direction. The bulging portion is not endless, but is long in an arc shape in the circumferential direction, and may be divided into a plurality of portions.

In FIGS. 11 and 12, instead of the protrusion 261 as the dish-side fitting portion 26, a bulging portion that maintains the same height on the inner peripheral side surface over one circumference and extends in an endless manner is applied. This is an example of the dish portion 2. FIG. 11 is a side view of another example of the peripheral wall portion 22 showing the detailed shape of the dish portion 2, and FIG. 12 is a cross-sectional view of another example of the peripheral wall portion 22 showing the detailed shape of the dish portion 2.

As shown in FIGS. 11 and 12, the dish-side fitting portion 26 formed in the vertical portion 233 of the dish portion 2 includes an annular bulging portion 262 arranged in the upper region of the vertical portion 233 and a protrusion 261. Instead, an annular bulge 263 is formed which is arranged in the lower region of the vertical portion 233. The annular bulging portion 263 fits into the recess 141 of the lower fitting portion 14. The annular bulging portion 263 has an annular shape in which the outer peripheral side surface of the dish portion 2 is maintained at the same height over one circumference and extends in an endless manner, and is semicircular in a cross-sectional view along the vertical direction. It has a circular or trapezoidal shape. The vertical length and the horizontal width of the annular bulge 263 are uniform.

The annular bulge 262 and the annular bulge 263 are separated in the vertical direction, and at the intermediate height of the vertical portion 233, an annular groove 264 serving as a gap between the annular bulge 262 and the annular bulge 263 is provided. It is defined. The annular groove portion 264 has an annular shape that extends endlessly on the outer peripheral side surface of the countersunk portion 2 while maintaining the same height over one circumference, and is based on the annular bulge portion 262 and the annular bulge portion 263. Then, it becomes a concave portion and has a semicircular or trapezoidal inner space in a cross-sectional view along the vertical direction.

According to the dish-side fitting portion 26 having the two annular bulging portions 262 and 263 and the annular groove portion 264 formed between them, even if the user tilts the food packaging container 100, the food packaging container 100 is tilted. It can be expected that the risk of liquid such as soup contained in the container body 1 leaking out of the container can be further reduced.

That is, as shown in FIG. 13, when the food packaging container 100 is tilted, the oil content floating on the water surface of the soup first tries to get over the lower annular bulging portion 263 and leak to the outside. At this time, the surface of the annular bulging portion 263 is coated with the oil content 103 of the soup. Therefore, when there is a gap between the annular bulge 263 and the recess 141, the water content of the soup slides on the surface of the oil 103 coated with the annular bulge 263, and the annular bulge 263 is easily formed. Overcome.

However, the oil 103 is stored in the annular groove 264 after passing over the lower annular bulge 263. Since the annular groove portion 264 continues in an endless manner along the circumference of the dish portion 2, the oil 103 that has surpassed a part of the annular bulging portion 263 spreads over the entire annular groove portion 264 without staying locally. To go. Therefore, the oil content 103 of the soup does not reach over the upper annular bulge portion 262, and the upper annular bulge portion 262 is difficult to be coated by the oil content 103. Then, since the upper annular bulge 262 is not coated with the oil 103, the water content of the soup is difficult to get over the annular bulge 262 formed of a hydrophobic resin such as polypropylene, and leaks from the annular bulge 262. The delivery is blocked.

In this way, in the case of the dish-side fitting portion 26 having the two annular bulging portions 262 and 263 and the annular groove portion 264 formed between them, the soup oil 103 is stored by the annular groove portion 264. It is also expected to have the effect of preventing the coating of the upper annular bulging portion 262 by the oil content 103 and further reducing the risk of water leakage from the soup.

(Other embodiments)
Although the embodiments of the present invention have been described above, various omissions, replacements, and changes can be made without departing from the gist of the invention. The embodiment and its modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

1 Container body 11 Bottom surface 12 Peripheral wall 13 Mouth edge 131 Border 14 Lower fitting 141 Recess 142 Lower step 143 Container side horizontal 15 Upper fitting 151 Recess 152 Upper step 2 Dish 21 Bottom 22 Peripheral wall Part 231 Step part 232 Chamfering part 233 Vertical part 234 Dish side horizontal part 25 Bottom side rib 26 Dish side fitting part 261 Protrusion part 262 Circular bulge part 263 Ring bulge part 264 Circular groove part 27 Flange part 28 Upper rib 281 Part 282 Inclined surface 283 Opening 284 Storage space 29 Tongue piece part 3 Lid 31 Dome part 32 Lid side horizontal part 33 Convex part 331 Tapered part 332 Reverse tapered part 34 Flange part 100 Food packaging container 101 Upper internal space 102 Lower internal space 103 Oil

Claims (11)

A container body that has a bottom surface and a peripheral wall and has an open top surface,
A dish portion having a bottom surface portion and a peripheral wall portion, which fits into the internal space of the container body and is supported apart from the bottom surface of the container body.
With
The container body
A container-side fitting portion extending over one circumference on the inner peripheral side surface of the container body,
An annular container-side horizontal portion that extends endlessly over one circumference in the circumferential direction of the container body at a position higher than the container-side fitting portion and extends horizontally outward in the radial direction of the container body. ,
Have,
The dish is
A dish-side fitting portion extending around the outer peripheral side surface of the dish portion and fitting with the container-side fitting portion,
An annular upper rib that extends endlessly over one circumference in the circumferential direction of the dish portion at a position higher than the dish side fitting portion, and is placed on the container side horizontal portion and bulges upward.
To have
A container for food packaging characterized by. The upper rib is hollow inside and the lower surface is open.
The food packaging container according to claim 1. The dish side fitting portion is
A first annular bulging portion that extends endlessly in the circumferential direction of the dish portion and bulges into a semicircular or trapezoidal shape in cross section.
A second annular bulge that is located below the first annular bulge, extends endlessly over one circumference in the circumferential direction of the dish, and bulges in a semicircular or trapezoidal cross-sectional view. Departure and
An annular groove portion defined by the first annular bulge portion and the second annular bulge portion and extending endlessly over one circumference in the circumferential direction of the dish portion.
To have
The food packaging container according to claim 1 or 2. The container body shall be made of foam.
The food packaging container according to any one of claims 1 to 3. The container-side fitting portion shall be composed of an inverted tapered recess that linearly expands in diameter toward the lower side.
The food packaging container according to claim 4. The upper rib is a narrow region in which the difference between the inner peripheral diameter and the outer peripheral diameter is small in each of the first arc range and the second arc range on the opposite side of the ring center from the first arc range. To have
The food packaging container according to any one of claims 1 to 5. The upper rib has an outwardly inclined inclined surface on one of the inner peripheral walls of the narrow region.
The food packaging container according to claim 6. The dish portion has an annular bottom rib that rises from the bottom surface portion of the dish portion, surrounds the bottom surface portion of the dish portion over one circumference, and extends at a position lower than the dish side fitting portion. thing,
The food packaging container according to any one of claims 1 to 7. Further provided with a lid portion that closes the internal space of the container body while fitting into the internal space of the container body.
The lid portion has an annular lid-side horizontal portion whose lower surface is in contact with or close to the upper surface of the upper rib.
The food packaging container according to any one of claims 1 to 8. Further provided with a lid portion that closes the internal space of the container body while fitting into the internal space of the container body.
The food packaging container according to any one of claims 1 to 8. Further provided with a film for closing the upper surface opening of the container body.
The food packaging container according to any one of claims 1 to 8.

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