JP2005008250A - Food packaging container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a food packaging container capable of suppressing the increase in the inner pressure while improving sealing properties better than a half-sealed food packaging container. <P>SOLUTION: This food packaging container is a sealable food packaging container (1). The container (1) has a container body (2) with an inner face (16) and a lid (4). The lid (4) includes a top plate (26) and an inner wall (30) extending upward from the periphery and capable of being sealingly pressed against the inner face (16) of the container body (2). The container body (2) has a groove (50) communicating with the outer part of the the container (1), when the container (1) is sealed, and isolated from the inner part of the container. The top plate (26) and the inner wall (30) can be deformed or moved by the increase in the inner pressure of the container (1) so as to communicate the inner part of the container (1) with the groove (50). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a food packaging container, and more particularly, to a sealable food packaging container.
[0002]
[Prior art]
Sealable food packaging containers that contain fermented foods such as kimchi, kanayamadera miso, and wasabi are known. When this food packaging container is distributed, the stored food may be fermented, the internal pressure of the food packaging container will rise, and the food packaging container may swell. In addition, in order to prevent an increase in the internal pressure of the food packaging container, a semi-sealed food packaging container in which a communication groove or a communication hole for communicating the inside and the outside of the food packaging container is provided in the container body or lid of the food packaging container. Are also known (see, for example, Patent Documents 1 and 2).
[0003]
[Patent Document 1]
Registered Utility Model No. 3020547 (FIGS. 4, 5, and 8)
[Patent Document 2]
Japanese Patent Laid-Open No. 11-314679 (FIG. 3)
[0004]
[Problems to be solved by the invention]
However, in the above-described semi-sealed food packaging container, the inside and outside of the container are always in communication with each other, so the smell inside the food packaging container caused by fermentation always leaks to the outside. In particular, in the case of food containing liquid, for example, kimchi, if the container is tilted, the liquid flows out or the liquid that blocks the communication groove or hole is pushed out due to an increase in the internal pressure of the food packaging container. And dirty around the food packaging container. Furthermore, there is a possibility that various germs may be mixed through the communication groove or the communication groove. When various germs are mixed, there is a possibility that the food may be spoiled or the original flavor of the fermented food may be impaired.
[0005]
Then, this invention is providing the food packaging container which can suppress the raise of the internal pressure of a food packaging container, improving a sealing performance rather than a semi-sealing type food packaging container.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a food packaging container according to the present invention is a food packaging container which can be sealed, has a container body having an inner surface, and extends upward from the peripheral edge of the top plate and the top plate. A lid including an inner wall sealably pressable against the inner surface of the main body, and at least one of the container main body and the lid communicates with the outside of the food packaging container when the food packaging container is sealed and It has an air passage isolated from the inside, and the top plate and the inner wall can be deformed or moved by increasing the internal pressure of the food packaging container so that the inside of the food packaging container and the air passage are communicated. It is a feature.
[0007]
In the food packaging container configured as described above, immediately after the food is stored in the food packaging container, the food packaging container can be sealed by the inner surface of the container body and the inner wall of the lid pressed against the inner surface. Thereafter, when the food is fermented or the like and the internal pressure of the food packaging container is gradually increased, the top plate and the inner wall of the lid are deformed or moved. For example, the top plate is bent so that the central portion thereof is lifted, or the entire lid is pushed upward. Thereby, the isolated air passage and the inside of the food packaging container are communicated. Thus, air inside the food packaging container passes through the air passage to the outside of the food packaging container, and an increase in the internal pressure of the food packaging container can be suppressed. Unlike the semi-sealed food packaging container of the prior art, the food packaging container of the present invention maintains a sealed state immediately after the food is stored until the air inside the food packaging container is released. As a result, while the sealed state is maintained, it is possible to prevent the smell of food, leakage of liquid components, and contamination with germs.
[0008]
The air passage may be provided in the main body container, may be provided in the lid, or may be provided in both. The air passage is, for example, a groove or a hole. The shape of the main body container is preferably a cylindrical shape, but may be a cylindrical shape having a polygonal outline as long as it can be sealed.
[0009]
In the food packaging container of the present invention, preferably, the inner wall of the lid has a lower end portion that is hermetically pressed against the inner surface of the container body, and an end portion of the air passage is disposed above the lower end portion. When the internal pressure rises, the top plate is elastically deformed so that the lower end of the inner wall is moved inward in the lateral direction, and the inner wall has a portion adjacent to the upper end of the lower end away from the inner surface. It elastically deforms so as to allow the end of the air passage to communicate with the inside of the food packaging container.
[0010]
In the food packaging container configured as described above, after the air inside the food packaging container has passed through the air passage, the air passage and the food packaging container can be isolated from each other again. More specifically, the food packaging container is initially sealed by elastically pressing the lower end of the inner wall of the lid against the inner surface of the container body. When the internal pressure of the food packaging container gradually increases, the central portion of the top plate is bent so as to be lifted, and accordingly, the lower end portion of the inner wall moves laterally inward so as to be separated from the inner surface. Furthermore, when the internal pressure of the food packaging container rises, the lower end portion of the inner wall and the portion adjacent above the inner wall are separated from the inner surface, a gap is formed between the inner wall and the main body container, and the end of the air passage and the interior of the food packaging container To communicate. As a result, the air inside the food packaging container escapes through the air passage to the outside of the food packaging container. When the air escapes, the internal pressure of the food packaging container decreases. Due to the elasticity of the top plate and the inner wall, the bending of the top plate is reduced, the lower end portion of the inner wall moves laterally outward, and the lower end portion of the inner wall of the lid is again pressed against the inner surface of the container body. Thus, the air passage and the interior of the food packaging container are again isolated. As a result, the food packaging container can be maintained in a sealed state not only after the food is stored but before the air inside the food packaging container is vented, as well as after the air inside the food packaging container is evacuated. The end of the air passage is preferably in the vicinity of the lower end.
[0011]
In the food packaging container of the present invention, preferably, the inner wall of the lid has a lower end portion that is hermetically pressed against the inner surface of the container body, and the end portion of the air passage is disposed on the container body and above the lower end portion. When the internal pressure of the food packaging container rises, the top plate and the inner wall move upward so as to move the lower end portion upward along the inner surface.
[0012]
In the food packaging container configured as described above, the air inside the food packaging container can be extracted through the air passage with a configuration different from the above-described configuration using the bending of the top plate of the lid. Specifically, the food packaging container is initially sealed by sealingly pressing the lower end of the inner wall of the lid against the inner surface of the container body. When the internal pressure of the food packaging container gradually increases, the entire lid moves upward, and accordingly, the lower end portion of the inner wall moves upward along the inner surface of the container body. Further, when the internal pressure of the food packaging container rises, the lower end portion of the inner wall moves to the end portion of the air passage, and the end portion of the air passage and the inside of the food packaging container communicate with each other. As a result, the air inside the food packaging container escapes through the air passage to the outside of the food packaging container. As a result, the food packaging container is kept sealed immediately after the food is stored until the air inside the food packaging container is released.
[0013]
In this food packaging container, more preferably, the food packaging container has biasing means for biasing the top plate and the inner wall to move downward when the internal pressure of the food packaging container decreases.
[0014]
In the food packaging container configured as described above, the air passage and the food packaging container can be isolated from each other again. More specifically, when the internal pressure of the food packaging container becomes larger than the force that moves the top plate and the inner wall downward by the biasing means, the entire lid moves upward as described above, and the end of the air passage and the food Communicate with the inside of the packaging container. As a result, the air inside the food packaging container escapes through the air passage to the outside of the food packaging container. When the air escapes, the internal pressure of the food packaging container decreases. The force for moving the top plate and the inner wall downward by the urging means becomes larger than the internal pressure of the food packaging container, and the top plate and the inner wall are moved downward. Accordingly, the lower end portion of the inner wall moves downward along the inner surface and moves away from the end portion of the groove. Thus, the groove and the interior of the food packaging container are again isolated. The urging means is, for example, an elastic plate or the like that is fixed to the main body container at one end and abutted against the lid so that the other end pushes the lid downward.
[0015]
In this food packaging container, more preferably, the lid further has an upper wall extending laterally outward from the upper end of the inner wall, and an outer wall extending downward from the periphery of the upper wall, and the inner wall and the outer wall are spaced apart from each other. The container body is arranged so as to become smaller from the upper side toward the lower side and can be elastically widened, and the container body has a body side wall that engages with the inner wall, the upper wall, and the outer wall. The side wall includes an extension for widening the distance between the inner wall and the outer wall when the top plate, the inner wall, the upper wall, and the outer wall move upward, and the biasing means includes the inner wall, the upper wall, the outer wall, and the main body side wall. Composed.
[0016]
In the food packaging container configured as described above, when the food packaging container is sealed, the inner wall, the upper wall, and the outer wall of the lid container are engaged with the side wall of the main body container. When the internal pressure of the food packaging container gradually rises and the entire lid is moved upward, the space between the inner wall and the outer wall is elastically widened by the expansion portion. The force for returning the inner wall and the outer wall to the original state is converted into a force for moving the entire lid downward by the extension portion. When the air escapes and the internal pressure of the food packaging container decreases, the entire lid moves downward by the converted force described above.
[0017]
Moreover, in the above-mentioned food packaging container in which the top plate and the inner wall move upward, preferably, the food packaging container has locking means for locking the top plate and the inner wall moved upward.
[0018]
The locking means can prevent the lid from moving upward and coming off. Furthermore, in the food packaging container having the urging means, the moving distance of the top plate and the inner wall can be limited in order to reliably move the top plate and the inner wall downward.
[0019]
In the food packaging container of the present invention, the air passage is preferably a groove provided on the inner surface of the container body.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a food packaging container according to the present invention will be described with reference to the drawings. FIG. 1 is an exploded longitudinal sectional view of a food packaging container according to the present invention. The food packaging container of this embodiment is substantially cylindrical. Hereinafter, the term “inner” indicates the radially inner direction, and the term “outer” indicates the radially outer direction.
[0021]
As shown in FIG. 1, the food packaging container 1 has a container body 2 and a lid 4. The container main body 2 includes a bottom wall 6, a main body side wall 8 extending upward from the periphery of the bottom wall 6, and an annular main body outer wall 10 disposed outside the main body side wall 8. The bottom wall 6 has a substantially disk shape. The main body side wall 8 has a substantially cylindrical shape, but extends upward. The body side wall 8 includes a lower portion 12 adjacent to the bottom wall 6 and an upper portion 14 disposed adjacent to and above the lower portion 12. The upper portion 14 is thicker than the lower portion 12. The upper portion 14 has an inner surface 16, an upper surface 18, and an outer surface 20. The main body outer wall 10 is disposed around the upper portion 14 of the main body side wall 8. The main body outer wall 10 includes an annular bottom portion 22 that extends laterally outward from the boundary between the lower portion 12 and the upper portion 14 of the main body side wall 8, and an annular tube portion 24 that extends upward from the periphery of the bottom portion 22. have. The distance between the cylindrical portion 24 and the upper portion 14 of the main body side wall 8 is substantially constant in the circumferential direction of the main body side wall 8.
[0022]
The lid 4 has a top plate 26 and an annular lid side wall 28 disposed around the top plate 26. The top plate 26 has a substantially disk shape. The lid side wall 28 has a substantially U-shaped cross section. Specifically, the lid side wall 28 includes a lid inner wall 30 extending upward from the periphery of the top plate 26, a lid upper wall 32 extending laterally outward from the upper end of the lid inner wall 30, and downward from the periphery of the lid upper wall 32. And an extending lid outer wall 34. A lid 4 attached to the container body 2 is shown in FIG. The lid inner wall 30, the lid upper wall 32 and the lid outer wall 34 are respectively engageable with the inner surface 16, the upper surface 18 and the outer surface 20 of the upper portion 14 of the main body side wall 8. The engagement between the container body 2 and the lid 4 will be described in detail later.
[0023]
The container body 2 and the lid 4 are preferably made by molding a plastic material. The plastic material is, for example, polystyrene, polypropylene, polyethylene, polyvinyl chloride, or polyethylene terephthalate. The bottom wall 6, the main body side wall 8, the top plate 26 of the lid, etc. are preferably provided with irregularities from the viewpoint of strength, design, and the like.
[0024]
Next, the container body 2 will be described in more detail with reference to FIGS. FIG. 2 is a partial plan view of the container body. FIG. 3 is an enlarged right side view of a part of the container body. FIG. 4 is an enlarged right side view of a part of the container body with a part of the outer wall of the body removed.
[0025]
As shown in FIGS. 1 to 3, the cylindrical portion 24 of the main body outer wall 10 includes a detachable portion 38 that can be detached from the container main body 2. Specifically, the cylindrical portion 24 of the main body outer wall 10 has two thin portions 40 that are spaced apart from each other in the circumferential direction, and a removal portion 38 is configured by a portion between the thin portions 40. . The bottom portion 22 of the main body outer wall 10 adjacent to the removal portion 38 has a notch 42. The thickness of the thin portion 40 is such a thickness that allows the removal portion 38 to be removed from the container body 2 by hand, and is, for example, 0.1 mm to 0.3 mm. The detachable portion 38 has an extended portion 44 that extends outward from the upper end portion thereof, and a protruding portion 46 that extends inward from an intermediate portion in the vertical direction. The protrusion 46 will be described in detail later.
[0026]
FIG. 4 shows the container body 2 in which the thin portion 40 is broken and the removal portion 38 is removed. As shown in FIGS. 1 and 4, a recess 48 is provided on the outer surface 20 of the upper portion 14 of the main body side wall 8 facing the removal portion 38. The recess 48 is formed flush with and continuously with the lower portion 12 of the main body side wall 8. A groove 50 extending in the vertical direction is provided on the inner surface 16 of the upper portion 14 of the main body side wall 8. The groove 50 will be described in detail later.
[0027]
Next, with reference to FIG. 5, the engaging part of the container main body 2 and the lid | cover 4 is demonstrated in detail. FIG. 5 is an enlarged cross-sectional view of the engaging portion of the food packaging container.
[0028]
As shown in FIG. 5, the lid inner wall 30, the lid upper wall 32, and the lid outer wall 34 are engaged with the inner surface 16, the upper surface 18, and the outer surface 20 of the upper portion 14 of the main body side wall 8, respectively. The lid inner wall 30 includes a lower end 52. The outer diameter of the lower end portion 52 is slightly larger than the inner diameter of the inner surface 16 of the upper portion 14 with which the lower end portion 52 engages. As a result, when the lower end portion 52 engages with the inner surface 16, the lid inner wall 30, in particular, its lower end 52 is elastically pressed against the inner surface 16. The container main body 2 and the lid 4 are sealed by this elastic pressing. On the other hand, the lid upper wall 32 and the upper surface 18 and the lid outer wall 34 and the outer surface 20 are not elastically pressed against each other. Therefore, air passages (not shown) are formed between at least a part between the lid upper wall 32 and the upper surface 18 and between the lid outer wall 34 and the outer surface 20.
[0029]
The groove 50 is formed in the inner surface 16 of the upper portion 14 of the main body side wall 8. The groove 50 extends downward from the upper surface 18, and the lower end portion thereof is disposed above the lower end portion 52 of the lid inner wall 30. Thus, when the food packaging container 1 is sealed, the groove 50 communicates with the outside of the food packaging container 1 but is isolated from the inside of the food packaging container 1. The groove 50 preferably has a width of 0.5 to 1.5 mm and a depth of 0.1 to 0.5 mm.
[0030]
The top plate 26 of the lid 4 can be bent so that the central portion of the top plate 26 is raised when the internal pressure of the food packaging container 1 rises. Accordingly, the lower end 52 of the lid inner wall 30 is movable inward in the lateral direction away from the inner surface 16 of the upper portion 14 of the main body side wall 8. (See FIG. 6). Further, the lower end 52 of the lid inner wall 30 is movable in the vertical direction along the inner surface 16 of the upper portion 14. Accordingly, the entire lid 4, that is, the top plate 26, the lid inner wall 30, the lid upper wall 32 and the lid outer wall 34 can also be moved in the vertical direction (see FIG. 6).
[0031]
The lid inner wall 30 and the lid outer wall 34 are arranged so that the distance between them decreases from the top to the bottom. Furthermore, the space | interval of the lid | cover inner wall 30 and the lid | cover outer wall 34 can be expanded elastically. Further, the outer surface 20 of the upper portion 14 of the main body side wall 8 includes an extended portion 54 that is extended outward and rounded. The extended portion 54 can widen the interval between the lid inner wall 30 and the lid outer wall 34 when the lid 4, that is, the top plate 26 and the lid side wall 28 move upward. The force that the lid inner wall 30 and the lid outer wall 34 elastically return when the top plate 26 and the lid side wall 28 move upward is converted into a force that moves the entire lid 4 downward by the expansion portion 54. The Thus, the lid side wall 28 and the main body side wall 8 constitute an element that biases the entire lid 4 downward. The above-described downward movement force may not be generated when the distance of upward movement of the lid 4 is large. The moving distance of the lid 4 is preferably 0.5 to 1.0 mm.
[0032]
The lid outer wall 34 has an extension 56 extending downwardly and outward therefrom. The extension portion 56 comes into contact with the protruding portion 46 of the removal portion 38 when the lid 4 moves upward. Thereby, the lid 4 moved upward is locked. It is preferable that the positional relationship between the extension portion 56 and the protruding portion 46 is configured so as to limit the upward movement distance of the lid 4.
[0033]
Next, the effect | action of the food packaging container which is embodiment of this invention is demonstrated.
[0034]
First, attachment and removal of the lid 4 will be described. The removal portion 38 is first connected to the cylindrical portion 24 of the main body outer wall 10. When food is accommodated in the main body container 2 and the lid 4 is attached to the main body container 2, the lid outer wall 34 is covered by the cylindrical portion 24 over the entire circumference thereof, so that the lid outer wall 34 cannot be pushed up from below. As a result, the lid 4 cannot be removed from the main body container 2. When removing the lid, the extended portion 44 of the removal portion 38 is pushed down by hand, the thin portion 40 is broken, and the removal portion 38 is removed from the container body 2. Thereby, a part of the lid outer wall 34 is exposed from the cylindrical portion 24 of the main body outer wall 10. The lid outer wall 34 is pushed up from below, and the lid 4 is removed from the main body container 2. Since the recessed part 48 is provided, a finger can be arrange | positioned under the lid | cover outer wall 34, and a lid | cover outer wall can be easily pushed up with a finger | toe. In order to further facilitate the removal of the lid 4, it is preferable to provide the groove 50 in alignment with the removal portion 38.
[0035]
Next, the operation of the food packaging container when the internal pressure of the food packaging container rises will be described with reference to FIGS. 5 and 6. FIG. 6 is an enlarged cross-sectional view of the engaging portion of the food packaging container when the internal pressure of the food packaging container increases.
[0036]
Immediately after the food is stored in the main body container 2, the food packaging container 1 is sealed by attaching the lid 4 to the main body container 2. The food packaging container 1 is sealed by elastically pressing the lid inner wall 30, particularly the lower end portion 52 thereof, against the inner surface 16 (see FIG. 5). Thereafter, when the food is fermented or the like, the internal pressure of the food packaging container 1 gradually increases. Thereby, the top plate 26 of the lid 4 is bent so that the central portion thereof is lifted, and at the same time, the entire lid 4 is pushed upward with respect to the main body container 2 and moves (see FIG. 6). Hereinafter, the bending of the top plate 26 and the movement of the entire lid 4 will be described separately.
[0037]
First, the bending of the top plate 26 will be described. When the center portion of the top plate 26 is bent so as to be lifted, the lower end portion 52 of the lid inner wall 30 is moved laterally inwardly away from the inner surface 16 of the upper portion 14 of the main body side wall 8 accordingly. Further, when the internal pressure of the food packaging container 1 rises, the lower end portion 52 of the lid inner wall 30 and a portion adjacent to the upper side thereof are separated from the inner surface 16, and a gap is formed between the lid inner wall 30 and the inner surface 16 of the main body container 2. This gap extends upward and finally reaches the end of the groove 50. Thus, the end of the air passage and the inside of the food packaging container 1 are communicated. As a result, the air inside the food packaging container 1 passes through the groove 50 and escapes to the outside of the food packaging container 1. When the air escapes, the internal pressure of the food packaging container 1 decreases. Due to the elasticity of the top plate 26 and the lid inner wall 30, the bending of the top plate 26 is reduced, the lower end 52 moves laterally outward, and the lid inner wall 30, particularly the lower end 52 is pressed against the inner surface 16 again. Sealed. Thus, the groove 50 is isolated from the inside of the food packaging container 1 again.
[0038]
Next, the movement of the entire lid 4 will be described. When the internal pressure of the food packaging container 1 gradually increases, the internal pressure becomes larger than the force by which the lid side wall 28 and the main body side wall 8 urge the lid 4 downward, and the entire lid 4 moves upward. Accordingly, the lower end portion 52 of the lid inner wall 30 moves upward along the inner surface 16. Further, when the internal pressure of the food packaging container 1 rises, the lower end portion 52 moves to the end of the groove 50 and makes the groove 50 communicate with the inside of the food packaging container 1. As a result, the air inside the food packaging container 1 passes through the groove 50 and escapes to the outside of the food packaging container 1. At this point, it is preferable that the extension 56 is in contact with the protrusion 46. When the air escapes, the internal pressure of the food packaging container 1 decreases. When the force by which the lid side wall 28 and the body side wall 8 urge the lid 4 downward becomes larger than the internal pressure, the entire lid 4 moves downward. Accordingly, the lower end portion 52 of the lid inner wall 30 moves downward along the inner surface 16 and leaves the end portion of the groove 50. Thus, the groove 50 is isolated from the inside of the food packaging container 1 again.
[0039]
In the embodiment of the present invention, the above-described action due to the bending of the top plate 26 and the action due to the movement of the entire lid 4 are combined. Depending on the thickness of the lid, the main body container, and other dimensions, the action due to the bending of the top plate 26 is predominant, or the action due to the movement of the entire lid 4 is predominant.
[0040]
Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications can be made within the scope of the invention described in the claims. Needless to say, these are included in the scope of the invention.
[0041]
In the above-described embodiment, the food packaging container 1 has one groove 50, but the size, number, arrangement, and the like of the groove 50 are arbitrary. When the internal pressure of the food packaging container 1 gradually increases, generally one groove 50 is sufficient. Further, when mainly utilizing the action due to the bending of the top plate 26, the end of the groove 50 is preferably arranged in the vicinity of the lower end 52 of the lid inner wall 30. Further, when mainly utilizing the action of the movement of the entire lid 4, the end of the groove 50 and the lower end 52 of the lid inner wall 30 may be separated from each other.
[0042]
In the above-described embodiment, the groove 50 is used, but a hole may be used.
[0043]
In the above-described embodiment, the food packaging container 1 is substantially cylindrical. However, if the lid and the main body container are sealed, the shape of the food packaging container 1 is polygonal, for example, a rectangular cylinder. There may be.
[0044]
In the above-described embodiment, the protrusions 46 are provided in the removal part 38, but the number and arrangement of the protrusions 46 are arbitrary.
[0045]
【The invention's effect】
As described above, according to the food packaging container of the present invention, it is possible to suppress an increase in the internal pressure of the food packaging container while improving the sealing performance as compared with the semi-sealed food packaging container.
[Brief description of the drawings]
FIG. 1 is an exploded longitudinal sectional view of a food packaging container according to the present invention taken along line II in FIG.
FIG. 2 is a partial plan view of a container body of a food packaging container according to the present invention.
FIG. 3 is an enlarged right side view of a part of the container body of FIG. 2;
4 is an enlarged right side view of a portion of the container body of FIG. 2 with a portion of the outer wall removed.
FIG. 5 is an enlarged cross-sectional view of a portion of a food packaging container according to the present invention.
FIG. 6 is an enlarged cross-sectional view of a portion of the food packaging container according to the present invention when the internal pressure of the food packaging container increases.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Food packaging container 2 Container main body 4 Lid 8 Main body side wall 16 Inner surface 18 Upper surface 20 Outer surface 26 Top plate 28 Lid side wall 30 Lid inner wall 32 Lid upper wall 34 Lid outer wall 46 Projection part 50 Groove 52 Lower end part 54 Extension part

Claims (7)

A sealable food packaging container,
A container body having an inner surface;
A lid that includes a top plate and an inner wall that extends upward from the periphery of the top plate and can be hermetically pressed against the inner surface of the container body;
At least one of the container body and the lid has an air passage that communicates with and is isolated from the outside of the food packaging container when the food packaging container is sealed;
The food packaging container, wherein the top plate and the inner wall can be deformed or moved by increasing the internal pressure of the food packaging container so that the inside of the food packaging container communicates with the air passage. The inner wall of the lid has a lower end portion that is hermetically pressed against the inner surface of the container body, and an end portion of the air passage is disposed above the lower end portion, and when the internal pressure of the food packaging container rises, The top plate is elastically deformed so as to move the lower end portion of the inner wall laterally inward, and the inner wall has a portion adjacent to the upper end of the lower end portion away from the inner surface and the air passage. The food packaging container according to claim 1, wherein the food packaging container is elastically deformed so as to allow the end of the food container to communicate with the inside of the food packaging container. The inner wall of the lid has a lower end portion that is hermetically pressed against the inner surface of the container body, and an end portion of the air passage is disposed in the container body and above the lower end portion, 2. The food packaging container according to claim 1, wherein the top plate and the inner wall move upward so as to move the lower end portion upward along the inner surface when rising. The said food packaging container is a food packaging container of Claim 3 which has a biasing means which urges | biases so that the said top plate and the said inner wall may be moved below, when the internal pressure of a food packaging container reduces. The lid further includes an upper wall extending laterally outward from an upper end of the inner wall, and an outer wall extending downward from a peripheral edge of the upper wall, and the inner wall and the outer wall are spaced from each other with an interval from above to below. The container body has a body side wall that engages with the inner wall, the upper wall, and the outer wall, and is arranged so as to be elastically widened. Includes an extension for widening the distance between the inner wall and the outer wall when the top plate, the inner wall, the upper wall and the outer wall move upward, and the biasing means includes the inner wall and the upper wall. The food packaging container according to claim 4, comprising the outer wall and the main body side wall. The said food packaging container is a food packaging container of Claim 3 or 4 which has the latching means which latches the said top plate and the said inner wall which moved upwards. The food packaging container according to claim 1, wherein the air passage is a groove provided on an inner surface of the container body.

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