JP2011037496A - Food packaging container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a food packaging container capable of appropriately venting ethylene gas generating from vegetables and fruits to the outside of the container while a closed system is held. <P>SOLUTION: The food packaging container includes: a container body 1; and a lid body 10. The container body 1 includes: a body side fitting part consisting of a body side fitting bottom part 4; a body side fitting peripheral wall part 5; a body side fitting top face part 6; and a body side fitting folding-back part 7, and a flange part 8, on the upper part of a food storing part 2. The lid body includes: a top face part 11; a lid body side fitting peripheral wall part 12; a lid body side fitting top face part 13; a lid body side fitting folding-back part 14; and a flange part 15. On the body side fitting folding-back part 7, a recessed channel part is provided at a certain distance from the body side fitting top face part 6 to vent ethylene gas to the outside of the container through this recessed channel part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a container for packaging foods such as vegetables and fruits, and more particularly to a plastic food packaging container suitable for packaging foods that release ethylene gas.

For example, fruits such as melon, persimmon, peach, and persimmon, and vegetables such as leek, spinach, kinusa, and broccoli (collectively referred to as “fruits and fruits”) still breathe after harvesting and emit ethylene gas. It is known. This ethylene gas is generally called an aging hormone and acts on aging and maturation of cells.
Therefore, if it is stored in an airtight container of harvested fruits and vegetables to prevent drying, ethylene gas emanating from the fruits and vegetables itself will accumulate in the container, causing it to wilt, spots, yellowing, and odors. This may cause the product value to decline.

  Therefore, conventionally, a device has been devised for hermetically storing so that ethylene gas emanating from the fruits and vegetables itself does not accumulate in the container. For example, in Patent Document 1 and the like, a synthetic resin foamed container with a lid is provided with a freshness-preserving agent that absorbs ethylene gas generated from fruits and vegetables, and an opening is provided in a part of the container. It has been proposed to close with an oxygen permeable sheet member.

JP 11-46677 A

  In order to prevent drying of fruits and vegetables and maintain freshness, the present invention can appropriately release ethylene gas generated from fruits and vegetables to the outside of the containers while maintaining the hermeticity of the containers. It is intended to provide a new food packaging container that can be stored in a state.

  The present invention includes a container body and a lid, and the container body has a body-side fitting bottom, a body-side fitting peripheral wall, a body-side fitting top surface portion, and a body-side fitting folded portion at the top of the food storage portion. The lid body includes a top surface portion, a lid body-side fitting peripheral wall portion, a lid body-side fitting top surface portion, and a lid body-side fitting folded portion, and in the main body side fitting folded portion, the distance from the main body side fitting top surface portion The food storage container provided with the structure which comprises a recessed groove part below from the lower position which set | placed is proposed.

  The food packaging container of the present invention can maintain hermeticity in a normal state by fitting the container body and the lid, and can prevent the stored food from drying. On the other hand, in the main body side fitting folded portion of the container main body, by providing a recessed groove portion at a distance from the main body side fitting top surface portion, the container main body and the lid body when the cover body is attached to the container main body. Can be provided, and when the internal pressure in the food packaging container increases, gas can escape to the outside through this portion. Therefore, while sealing can be maintained in a normal state, when ethylene gas is generated from the fruits and vegetables to increase the internal pressure in the food packaging container, the gas is appropriately released outside the container through the portion provided with the recessed groove portion. The fruits and vegetables can be stored fresh. Therefore, even if it contains fruits and vegetables that release ethylene gas, such as leeks and spinach, it can be preserved while maintaining its crispness and freshness.

It is a top view which shows an example of the container main body of the food packaging container which concerns on the Example of this invention. It is a side view of FIG. It is a top view which shows an example of the cover body of the food packaging container which concerns on the Example of this invention. It is sectional drawing (thickness abbreviation) of FIG. It is a partial exploded sectional view (thickness abbreviation) for explaining an example of a fitting structure of a container main part and a lid. It is a fragmentary sectional view for explaining an example of a fitting structure of a container main part and a lid, and (A) and (B) are fragmentary sectional views in a place where right-and-left positions differ. (A)-(C) is a fragmentary sectional view (thickness abbreviation) for demonstrating the structural example of a main body side fitting surrounding wall part, respectively. It is a figure for demonstrating the state in which the inversion angle (theta) changes with right-and-left positions in a main body side fitting surrounding wall part, (A) is a top view, (B) is in X position (center part) of (A). Cross section (thickness omitted) of the main body side fitting peripheral wall, (C) is a cross section (thickness omitted) of the main body side fitting peripheral wall at the Y position of (A), and (D) is at the Z position of (A). It is the figure which showed the cross section (thickness omission) of the main body side fitting surrounding wall part. (A) And (B) is a fragmentary sectional view (thickness omitted) for demonstrating the structural example of this main body side fitting part, respectively. It is the perspective view which looked at a part of container main body from the upper surface in order to demonstrate a recessed groove part. It is the fragmentary sectional view which showed an example of the cross section of the part in which the recessed groove part was formed. (A) is sectional drawing which showed an example of the fitting state of the part which formed the recessed groove part, and (B) was an example of the fitting state of the part which does not form the recessed groove part.

  Examples of embodiments of the present invention will be described below. However, the scope of the present invention is not limited to the embodiments described below.

<This packaging container>
The food packaging container (referred to as “the present packaging container”) according to the present embodiment is a plastic food packaging container provided with a container body 1 and a lid 10 in a detachable manner.

  The material of this packaging container is not specifically limited. Examples thereof include transparent synthetic resins such as stretched polyester, amorphous polyethylene terephthalate (A-PET), polypropylene, polyethylene terephthalate, polyethylene, polystyrene, stretched polystyrene, heat-resistant stretched polystyrene, polycarbonate, and polylactic acid. It can be formed from a polymer blend or copolymer consisting of any of these, or combinations of two or more of these.

  Both the container body 1 and the lid body 10 can be formed by a thermoforming method such as compressed air or vacuum forming. However, it is not limited to such a thermoforming method, and may be formed by other manufacturing methods.

  As shown in FIGS. 1-4, this packaging container is provided with the container main body 1 and the lid 10 as described above, and the former container main body 1 includes the food storage portion 2, the main body side fitting bottom portion 4, the main body. A side fitting peripheral wall portion 5, a main body side fitting top surface portion 6 and a main body side fitting folded portion 7, and a flange portion 8. The latter lid body 10 includes a top surface portion 11, A lid body side fitting peripheral wall portion 12, a lid body side fitting top surface portion 13, a lid body side fitting folded portion 14 and a flange portion 15 are provided. As shown in FIGS. The top surface portion 11 of the lid body 10 and the lid body side fitting peripheral wall portion 12 are fitted into the peripheral wall portion 5, and the lid body side fitting top surface portion is disposed outside the main body side fitting top surface portion 6 and the main body side fitting folded portion 7. 13 and the lid-side fitting folded portion 14 are fitted so that the inside of the packaging container can be sealed. To have.

<Container body 1>
The container main body 1 includes a food storage portion 2, a main body side fitting bottom portion 4, a main body side fitting peripheral wall portion 5, a main body side fitting top surface portion 6, and a main body side fitting folded portion 7, and a main body side fitting portion 3. , And a heel part 8. However, other components may be provided.

(Food storage part 2)
The food storage part 2 includes a container bottom part 2a and a container peripheral wall part 2b.

The container bottom surface portion 2a has a shape formed by rounding four corners of a rectangle when viewed from above, and a rib is provided in the container bottom surface portion 2a.
However, the shape of the container bottom 2a is arbitrary. For example, even if it is circular, it can be formed in other shapes. In addition, it is optional to provide a rib on the container bottom 2a.

The container peripheral wall portion 2b is erected from the periphery of the container bottom portion 2a, and forms the container bottom portion 2a and the food storage portion 2.
Although ribs are provided in the container peripheral wall portion 2b of this example, providing ribs is optional.

(Body fitting bottom 4)
The body-side fitting bottom portion 4 is formed by bending the upper edge end portion of the container peripheral wall portion 2b horizontally to the outside, and is formed in a substantially rectangular shape with an appropriate width approximately horizontally on the upper edge portion of the food storage portion 2. It is installed. However, the shape is arbitrary.

(Main body side fitting peripheral wall 5)
The main body side fitting peripheral wall portion 5 is erected from the peripheral edge portion of the main body side fitting bottom portion 4 and is provided with an appropriate height.

  As shown in FIG. 5, the body-side fitting peripheral wall portion 5 is formed in an inverted shape so as to be narrowed upward, and the top surface portion 11 of the lid body 10 is formed in the main-body-side fitting peripheral wall portion 5. When the lid-side fitting peripheral wall portion 12 is pushed in, as shown in FIG. 6A, the main body-side fitting peripheral wall portion 5 and the lid-side fitting peripheral wall portion 12 are fitted.

  At this time, as an example of forming inwardly so as to be narrowed upward, as shown in FIG. 7A, it is formed so as to inward from the base end portion of the body-side fitting peripheral wall portion 5. Alternatively, as shown in FIG. 7 (B), the main body side fitting peripheral wall portion 5 may be formed so as to inward from the middle portion of the main body side fitting peripheral wall portion 5. The inward angle may be changed from the middle part of the main body side fitting peripheral wall part 5 as shown in FIG. 7C. You may form in the curved shape which changes to.

  Moreover, as shown in FIGS. 8A to 8D, for example, the body-side fitting peripheral wall portion 5 is formed such that the inward angle θ thereof varies depending on the left and right positions. That is, when the lid 10 is fitted, as shown in FIG. 6A, the portion where the body-side fitting peripheral wall 5 and the lid-side fitting peripheral wall 12 are in close contact with each other, and FIG. As shown, it is formed so that a gap is formed between the body-side fitting peripheral wall portion 5 and the lid-side fitting peripheral wall portion 12.

At this time, in order to make the inward angle θ of the body-side fitting peripheral wall portion 5 different depending on the left and right positions, for example, when the body-side fitting peripheral wall portion 5 is provided in a substantially rectangular shape in a top view. For example, as shown in FIGS. 8A to 8D, the central portions of the peripheral walls 5a, 5b, 5c, and 5d that form the respective sides of the rectangular shape are erected substantially vertically, and are appropriately separated from the central portion by a distance from side to side. In this range, the inclination angle can be increased as it goes to the left and right sides (θ ′ <θ ″ <θ ′ ″).
However, this example is merely an example, and it is not always necessary to vertically stand the central portion of the peripheral walls 5a, 5b, 5c, and 5d, and the inclination angle of the central portion may not be minimized. Conversely, the inclination angle at the center can be maximized. Furthermore, it is possible to provide a position at which the inward angle θ is varied at another location.
Further, depending on the material, size, and shape of the container, it is not necessary to form the inward angle θ of the main body side fitting peripheral wall portion 5 so as to differ depending on the left and right positions.

(Body side fitting top surface 6)
The main body side fitting top surface portion 6 is bent outward from the upper edge end portion of the main body side fitting peripheral wall portion 5, and is provided in a substantially rectangular shape so as to be flat or slightly curved with an appropriate width. ing. However, the shape is arbitrary.

(Main body side fitting folded part 7)
The main body side fitting folded portion 7 is connected to the outer edge portion of the main body side fitting top surface portion 6 and is inclined obliquely downward and outward from the outer edge portion of the main body side fitting top surface portion 6, for example, as shown in FIG. The inclined surface portion 7a is continuously provided, the inner folding fitting portion 7b is continuously provided below the inclined surface portion 7a, and the drooping surface portion 7c is continuously provided below the inclined surface portion 7a. Can be formed in a row.

  However, as shown in FIG. 9 (A), the drooping surface portion 7c may be provided continuously from the outer edge portion of the main body side fitting top surface portion 6, or from the outer edge portion of the main body side fitting top surface portion 6. The hem spreading part 7d may be provided continuously. Furthermore, you may form in another shape.

(Concave groove 9)
The main body side fitting folded portion 7 is provided with a recessed groove portion 9 downward from a lower position at a vertical distance L from the main body side fitting top surface portion 6.

  For example, in the case where the main body side fitting top surface portion 6 is provided in a substantially rectangular shape as in this example, the recessed groove portion 9 has four corners of the main body side fitting folded portion 7 as shown in FIG. In the example of FIG. 11, from the middle position of the inclined surface portion 7a to the lower end portion, the upper surface is formed as a recessed groove portion 9 recessed inward. When viewed from the side, the groove is formed like a concave groove recessed inside the container.

For example, even when the main body side fitting folded portion 7 is provided in a substantially rectangular shape, the recessed groove portion 9 can be provided at an appropriate place other than the positions corresponding to the four corners. For example, when the main body side fitting peripheral wall portion 5 is provided in a substantially rectangular shape when viewed from above, it can be provided in each side portion of the main body side fitting folded portion 7. However, if it is provided on each side as described above, the strength is likely to be reduced and it is likely to be deformed, and it may be difficult to maintain the sealing property. Therefore, it is preferably provided at positions corresponding to the four corners.
For example, when the main body side fitting folded portion 7 is provided in a substantially circular shape, it may be provided at an appropriate interval.
Furthermore, the number of the recessed groove portions 9 can be changed as appropriate.

The recessed groove 9 is one point that is formed from the lower end position L from the upper end portion of the inclined surface portion 7a, that is, the main body side fitting top surface portion 6, and the upper end portion of the inclined surface portion 7a, that is, the main body side fitting top. It is preferable to form from the position below 0.2 mm-1.5 mm from the surface part 6, and it is preferable to form from 0.5 mm-0.7 mm below especially.
In addition, it is preferable to provide the lower end part of the recessed groove part 9 to the lower end part of the main body side fitting folding | turning part 7 so that the gas in a container may escape through the recessed groove part 9. FIG.

(Human 8)
As shown in FIGS. 1 and 5, the flange portion 8 is formed so that the lower end edge portion of the body-side fitting folded-back portion 7 is bent horizontally and appropriately extended so that the entire outer contour has a rectangular shape. As shown in FIG. 1, the four corners are substantially triangular.
The shape and size of the collar portion 8 are arbitrary, and the collar portion 8 may not be formed.

<Cover body 10>
As shown in FIGS. 3 and 4, the lid body 10 includes a top surface portion 11, a lid body side fitting peripheral wall portion 12, a lid body side fitting top surface portion 13, a lid body side fitting folded portion 14, and a flange portion 15. . However, other components may be provided.

(Top 11)
The top surface portion 11 is formed in a shape and size that can be fitted into the body-side fitting peripheral wall portion 5 of the container body 1. That is, in this example, it is formed in a shape formed by rounding the four corners of the rectangle in top view, and ribs are appropriately formed inside.
In addition, providing a rib etc. in the top | upper surface part 11 is arbitrary. Further, although it is possible to provide a vent hole or the like, it is not preferable to provide it in order to maintain hermeticity.

(Cover side fitting peripheral wall 12)
The lid-side fitting peripheral wall portion 12 is erected from the peripheral edge portion of the top surface portion 11, and is formed in an inverted shape so as to be narrowed upward. At this time, it is preferable that the angle at which the lid-side fitting peripheral wall portion 12 is turned inward is about the largest angle at which the main body-side fitting peripheral wall portion 5 is turned inward.

(Lid side fitting top surface portion 13)
The lid-side fitting top surface portion 13 is formed so as to fit the main body-side fitting top surface portion 6, is bent outward from the upper edge end portion of the lid-side fitting peripheral wall portion 12, and has an appropriate width. It is formed to be flat or slightly curved.

(Cover side fitting folded part 14)
The lid-side fitting folded portion 14 is formed so as to fit the main body-side fitting folded portion 7, that is, as shown in FIG. It is formed in the shape and shape.

(Isobu 15)
The flange portion 15 is formed so as to extend horizontally from the lower end edge of the lid-side fitting folded portion 14 to the outside horizontally, and is formed so that the entire outer contour has a rectangular shape, as shown in FIG. Is formed as a substantially triangular gripping portion.
The shape and size of the collar portion 15 are arbitrary, and the collar portion 15 may not be formed.

<Mated state>
As shown in FIG. 5, when the container body 1 and the lid body 10 are pushed into the body-side fitting peripheral wall portion 5 of the container body 1, the top surface portion 11 and the lid-side fitting peripheral wall portion 12 of the lid body 10 are pushed. 6 (A), the bottom portion of the top surface portion 11 of the lid body 10 is supported in contact with the body-side fitting bottom portion 4, and the lid-side fitting peripheral wall portion 12 and the main body-side fitting peripheral wall portion 5 are fitted. They are jammed and locked together. At the same time, by fitting the lid-side fitting top surface portion 13 and the lid-side fitting folded portion 14 on the outside of the body-side fitting top surface portion 6 and the body-side fitting folded portion 7, FIG. As shown, the main body side fitting top surface portion 6 and the lid side fitting top surface portion 13, the main body side fitting folded portion 7 and the lid side fitting folded portion 14 are in close contact with each other, and the inside of the packaging container is sealed. be able to.

  At this time, since the recessed groove portion 9 is provided in the body-side fitting folded portion 7 of the container body 1, the body-side fitted folded portion is provided at the place where the recessed groove portion 9 is provided, as shown in FIG. 7 and the lid-side fitting folded portion 14 are formed in a space that is not in close contact, that is, a gap, and is formed at a slight vertical distance L from the body-side fitting top surface portion 6. Therefore, when the internal pressure in the storage container increases, the internal gas can escape through this portion and the recessed groove portion 9. Therefore, in the normal state, the inside of the food storage unit 2 can be maintained in a sealed state. On the other hand, when the internal pressure is increased by the ethylene gas generated from the food inside, the gas can be released to the outside of the container. It is designed not to accumulate inside.

  Further, the body-side fitting peripheral wall portion 5 is formed in an inverted shape so as to be narrowed upward, and the angle of the inversion is different depending on the left and right positions. As shown in FIG. 3, when a gap is generated between the lid-side fitting peripheral wall portion 12 and the main-body-side fitting peripheral wall portion 5 depending on the location, and the internal pressure is increased by the ethylene gas generated from the food in the food storage portion 2, this gap Gas can escape to the outside of the container.

  Therefore, according to the present packaging container, it is possible to maintain hermeticity in a normal state and prevent the stored food from being dried and maintain freshness, while ethylene gas is generated from the stored fruits and vegetables. When the internal pressure increases, the gas can be released out of the container through the recessed groove portion 9 or a portion where the contact pressure between the body-side fitting peripheral wall portion 5 and the lid-side fitting peripheral wall portion 12 is weak. Therefore, even if it accommodates fruits and vegetables that release ethylene gas, such as leeks and spinach, it can be preserved while maintaining its crispness and freshness.

  In addition, while providing the recessed groove part 9 and it is preferable to form so that the inward angle of the main body side fitting surrounding wall part 5 may change with right-and-left positions, in any one, ethylene generated from food in the food storage part 2 Since the gas can escape to the outside of the container when the internal pressure is increased by the gas, only one of them may be provided.

<Explanation of terms>
In the present invention, when expressed as “X to Y” (X and Y are arbitrary numbers), “X is preferably greater than X” and “preferably Y”, with the meaning of “X to Y” unless otherwise specified. It is meant to include “less than”.
Further, in the present invention, when expressed as “more than X” (X is an arbitrary number), unless otherwise specified, it means “preferably greater than X” and includes “Y or less” (Y is an arbitrary number) When expressed as (numerical), it means “preferably smaller than Y” unless otherwise specified.

  EXAMPLES Hereinafter, although an Example product and a comparative example product are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.

(Example product)
1-4, the food storage part 2 (122 mm x 122 mm x 34 mm), the main body side fitting bottom part 4, the main body side fitting peripheral wall part 5, the main body side fitting top surface part 6, and the main body side fitting folded back While forming the container main body 1 so as to include the main body side fitting portion 3 including the portion 7 and the flange portion 8, the top surface portion 11, the lid side fitting peripheral wall portion 12, the lid side fitting top surface portion 13, and the lid side The lid body 10 is formed so as to include the fitting folded portion 14 and the flange portion 15.

The body-side fitting peripheral wall portion 5 is formed so as to be inwardly inclined from the base end portion, and the inward inclination angle θ at the central portion of each peripheral wall 5a, 5b, 5c, 5d is set to 0 °. It is formed so that the maximum inward inclination angle θ is 3.5 °.
Further, at the four corners of the main body side fitting folded portion 7, a concave groove portion 9 having a V groove shape in a top view is formed from a position 0.61 mm below the main body side fitting top surface portion 6 to the lower end portion of the main body side fitting folded portion 7. It is formed.

(Comparative product)
In the above-described embodiment product, the main body side fitting peripheral wall portion 5 is formed so as to be inwardly inclined at 3.5 °, and the points other than the formation of the recessed groove portion 9 are the same as those in the above-described embodiment product. It is.

<Refrigeration test>
A plurality of such example products and comparative example products were prepared so that the contents could be evaluated by opening every elapsed day, and 45 g of chopped green onions were stored in each container and stored refrigerated at 5 ° C. . We observed the color, taste, smell, shape, etc.

(result)
When 3 days passed after refrigerated storage, bulges were observed in the lid of the comparative product due to gas generation from the contents (sliced green onions), but no swelling was observed for the example products. .
When 4 days passed after refrigerated storage, the comparative chopped green onions lost their original scent, felt a strange odor, and felt sticky. On the other hand, the chopped green onions of the example products remained unchanged with no change.

DESCRIPTION OF SYMBOLS 1 Container main body 2 Food storage part 3 Main body side fitting part 4 Main body side fitting bottom part 5 Main body side fitting peripheral wall part 5
6 Main body side fitting top surface portion 7 Main body side fitting folded portion 8 ridge portion 9 Recessed groove portion 10 Lid 11 Top surface portion 12 Lid side fitting peripheral wall portion 13 Lid side fitting top surface portion 14 Lid side fitting folded portion 15

Claims (3)

A container body and a lid,
The container body includes a main body side fitting bottom, a main body side fitting peripheral wall portion, a main body side fitting top surface portion, and a main body side fitting folded portion at the top of the food storage portion,
The lid includes a top surface portion, a lid-side fitting peripheral wall portion, a lid-side fitting top surface portion, and a lid-side fitting folded portion,
A food storage container comprising a configuration in which a recessed groove portion is provided downward from a lower position at a distance from the body-side fitting top surface portion in the body-side fitting folded portion.   2. The food container according to claim 1, wherein the recessed groove is formed from a position 0.2 mm to 1.5 mm below the top fitting portion on the main body side. The food storage container according to claim 1 or 2, wherein the main body-side fitting peripheral wall portion has a portion that is inwardly inclined so as to squeeze upward, and has an internal inclination angle that varies depending on the left and right positions.

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