Packaging container

Abstract

To provide a packaging container in which a lid can be fitted to a container body with a small force.SOLUTION: A packaging container 300 having a polygonal shape in a plan view and including a container body 200 and a lid 100, in which the container body 200 includes a container body-side flange 230 and a container body-side fitting portion 250 on the container body-side flange 230, the lid 100 includes a lid-side flange 130 and a lid-side fitting portion 150 that is internally fitted to the container body-side fitting portion 250 on the lid-side flange 130, and the container body-side fitting portion 250 and the lid-side fitting portion 150 are inclined downward at a corner portion 370.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a packaging container. [Background technology]

[0002] BACKGROUND ART Packaging containers for storing food such as prepared dishes and sushi have been used in supermarkets, convenience stores, and the like.

[0003] There are various types of packaging containers, and the packaging container of Patent Document 1 has a polygonal shape in plan view, and is equipped with a container body and a lid, and is sealed by externally fitting a lid-side fitting portion of the lid into a container-body-side fitting portion of the container body. However, because the container-body-side fitting portion and the lid-side fitting portion are formed in a straight line in the horizontal direction, a relatively strong force must be applied when fitting them together, which raises the risk of the container body and the lid being crushed or damaged. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7193195 Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above problems, the present invention provides a packaging container in which a lid can be fitted to a container body with a light force. [Means for solving the problem]

[0006] In order to solve the above problem, the packaging container according to claim 1 of the present invention is a packaging container having a polygonal shape in a plan view, and comprising a container body and a lid body, wherein the container body has a container body side flange and a container body side fitting portion on the container body side flange, the lid body has a lid body side flange and a lid body side fitting portion on the lid body side flange that fits internally with the container body side fitting portion, and the container body side fitting portion and the lid body side fitting portion are inclined downward at the corner portions.

[0007] According to the above feature, the lid-side fitting portion and the container body-side fitting portion are inclined downward at the corners, so that the pressing force applied when fitting tends to be concentrated downward and is easily transmitted to the bottom of the lid-side fitting portion and the container body-side fitting portion. This makes it easy to fit the lid to the container body with light force, preventing the packaging container from being crushed or damaged.

[0008] In order to solve the above problem, the packaging container according to claim 2 of the present invention is characterized in that a non-engaging portion is provided at the bottom of the inclined portion of the container body side engaging portion or the lid side engaging portion in the corner portion, where the container body and the lid body do not engage with each other.

[0009] According to the above feature, the non-fitting portion allows the lid body to be fitted to the container body with a light force.

[0010] In order to solve the above problems, the packaging container according to claim 3 of the present invention is characterized in that a leg portion is provided below the lowest part of the inclined portion of the fitting portion on the container body side.

[0011] According to the above features, the pressing force applied during fitting is transmitted downward along the fitting portion on the container body side and can be released from the fitting portion on the container body side via the legs to the installation surface, etc., thereby preventing the packaging container from being crushed by the pressing force.

[0012] In order to solve the above problem, the packaging container according to claim 4 of the present invention is a packaging container comprising a container body and a lid body, and having a square shape in plan view with cut corners and at least one corner portion recessed inward, wherein the container body comprises a container body side flange and a container body side fitting portion on the container body side flange, the lid body comprises a lid body side flange and a lid body side fitting portion on the lid body side flange that fits internally with the container body side fitting portion, and the container body side fitting portion and the lid body side fitting portion are inclined downward at the cut corner portion.

[0013] According to the above feature, the lid-side fitting portion and the container body-side fitting portion are inclined downward at the corner cutout, so that the pressing force applied when fitting tends to be concentrated downward and is easily transmitted to the lowest part of the lid-side fitting portion and the container body-side fitting portion. This makes it easy to fit the lid to the container body with light force, preventing the packaging container from being crushed or damaged. [Effects of the Invention]

[0014] In the packaging container of the present invention, the lid can be fitted to the container body with a light force. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an overall perspective view of a lid 100 of a packaging container 300 according to the present invention. [Figure 2] 2(a) is a plan view of the lid body 100, and FIG. 2(b) is a front view of the lid body 100. As shown in FIG. [Figure 3] FIG. 3(a) is a side view of the lid 100, and FIG. 3(b) is a side view of the lid 100 as seen from a corner portion 170. [Figure 4] FIG. 4(a) is an end view taken along line AA, and FIG. 4(b) is an end view taken along line BB. [Figure 5] FIG. 5 is an overall perspective view of the container body 200. As shown in FIG. [Figure 6] 6(a) is a plan view of the container body 200, and FIG. 6(b) is a front view of the container body 200. As shown in FIG. [Figure 7]7(a) is a side view of the container body 200, and FIG. 7(b) is a side view of the container body 200 as seen from a corner portion 270. As shown in FIG. [Figure 8] FIG. 8(a) is a CC end view, and FIG. 8(b) is a DD end view. [Figure 9] FIG. 9 is an overall perspective view of the packaging container 300. As shown in FIG. [Figure 10] 10(a) is a plan view of the packaging container 300, and FIG. 10(b) is a side view of the packaging container 300 as seen from a corner portion 370. As shown in FIG. [Figure 11] FIG. 11(a) is an end view taken along line EE, and FIG. 11(b) is an end view taken along line FF. [Explanation of symbols]

[0016] 100 Lid 130 Lid side flange 150 Lid side fitting part 200 container body 230 Container body side flange 250 Container body side fitting part 370 Corner section 300 Packaging containers DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification, "upward" refers to a direction that faces upward in the vertical direction when the packaging container is placed on a horizontal surface, and "downward" refers to a direction that faces downward in the vertical direction.

[0018] First, Fig. 1 to Fig. 4 show the lid body 100 of the packaging container 300 according to the present invention. Fig. 1 is an overall perspective view of the lid body 100, Fig. 2(a) is a plan view of the lid body 100, Fig. 2(b) is a front view of the lid body 100, Fig. 3(a) is a side view of the lid body 100, Fig. 3(b) is a side view of the lid body 100 as seen from a corner portion 170, Fig. 4(a) is an end view taken along line A-A, and Fig. 4(b) is an end view taken along line B-B.

[0019] As shown in FIGS. 1 to 4 , the lid 100 is made of a synthetic resin sheet, has a shallow dish shape that opens downward, and is generally rectangular in plan view with corner portions 170 at the four corners. The lid 100 has a flat, horizontally extending top surface 110, side surfaces 120 that extend downward from the top surface 110, a flat lid flange 130 that extends outward from the side surface 120, and a lid fitting portion 150 that is convex outward at the base side of the lid flange 130 (the connection point with the side surface 120). The side surfaces 120 and the lid flange 130 are provided continuously or intermittently around the entire periphery of the lid 100. Although the lid 100 has a generally rectangular shape in plan view, the shape is not limited thereto and can be any shape that is generally polygonal in plan view, such as a square in plan view.

[0020] The corner portion 170 is disposed between adjacent side portions 180, and the lower end 181 of the side portion 180 is located near the boundary between the side surface 120 and the lower end of the lid-side flange 130. The lower end 171 of the corner portion 170 is continuous with the lower end 181 of the adjacent side portion 180, and the lower end 171 of the corner portion 170 curves downward in an arc from the linear lower end 181. The lid-side fitting portion 150 also curves downward at the corner portion 170 to follow the curved shape from the lower end 181 of the side portion 180 to the lower end 171 of the corner portion 170. Specifically, one end 151 of the lid-side fitting portion 150 is linear along the lower end 181 of the side portion 180, and the other end 152 of the lid-side fitting portion 150 curves downward along the lower end 171 of the corner portion 170. Furthermore, lid body side fitting portions 150 are arranged on both sides of corner portion 170, and lid body side fitting portions 150 on both sides are curved in an inverted V shape, like an arc along lower ends 171 of corner portions 170. The other ends 152, which are the lowest parts of the curved portions of lid body side fitting portions 150, are not connected to each other and are spaced apart. Therefore, these spaced apart parts are not provided with lid body side fitting portions 150 and do not have a fitting function, and therefore form non-fitting portions 159.

[0021] Furthermore, at the corner portion 170 of the lid 100, a portion of the lid-side flange 130 is recessed inward to form a chamfered corner portion 179. In the side view shown in FIG. 3(b), the lid-side fitting portions 150 on both sides of the corner portion 170 are curved downward at the chamfered corner portion 179. As shown in FIG. 3(b), in the side view, the lower end 171 of the corner portion 170 is curved downward from a connecting portion 172 with the lower end 181 of the adjacent side portion 180. However, as shown in FIG. 2(a), in the plan view, the lower end 171 of the corner portion 170 extends linearly from the connecting portions 172 on both sides. If the chamfered corner portion 179 of the corner portion 170 of the lid 100 has a recessed portion toward the inside of the container, stress will be concentrated inward at the recessed portion of the chamfered corner portion 179, making the corner portion 170 more likely to collapse. Therefore, as shown in Fig. 2(a), in plan view, the lower end 171 of the corner portion 170 extends linearly across the connecting portions 172 on both sides, making the corner portion 170 less likely to collapse inward. Also, as shown in Fig. 3(b), in side view, the lid body side fitting portions 150 on both sides of the corner portion 170 are curved downward, but as shown in Fig. 2(a), in plan view, the lid body side fitting portions 150 on both sides of the corner portion 170 are aligned in a straight line. This prevents stress generated when the lid body side fitting portions 150 are fitted from concentrating on the inside of the corner portion 170, making the corner portion 170 less likely to collapse inward.

[0022] The lid body 100 is formed by sheet molding (e.g., vacuum molding, pressure molding, hot plate molding) using a sheet-shaped synthetic resin with a thickness of approximately 0.1 mm to 1.0 mm (millimeters). For example, the material for the lid body 100 may be polystyrene, polypropylene, polyethylene, A-PET, polylactic acid, or biaxially stretched versions of these.

[0023] Next, Fig. 5 to Fig. 8 show the container body 200 of the packaging container 300 according to the present invention. Fig. 5 is an overall perspective view of the container body 200, Fig. 6(a) is a plan view of the container body 200, Fig. 6(b) is a front view of the container body 200, Fig. 7(a) is a side view of the container body 200, Fig. 7(b) is a side view of the container body 200 as seen from a corner portion 270, Fig. 8(a) is a CC end view, and Fig. 8(b) is a DD end view.

[0024] As shown in FIGS. 5 to 8 , the container body 200 is made of a synthetic resin sheet, has a shallow dish shape that opens upward, and is generally rectangular in plan view with corner portions 270 at the four corners. The container body 200 has a flat, horizontally extending bottom surface 210, side surfaces 220 that extend upward from the bottom surface 210, a flat container body flange 230 that extends outward from the side surface 220, and a container body fitting portion 250 that is recessed outward at the base side of the container body flange 230 (the connection point with the side surface 220). The side surfaces 220 and the container body flange 230 are provided continuously or intermittently around the entire periphery of the container body 200. Although the container body 200 has a generally rectangular shape in plan view, the shape is not limited thereto and can be any shape that is generally polygonal in plan view, such as a square in plan view.

[0025] The corner portion 270 is disposed between adjacent side portions 280, and the lower end 281 of the side portion 280 is located near the boundary between the side surface 220 and the lower end of the container body-side flange 230. The lower end 271 of the corner portion 270 is continuous with the lower end 281 of the adjacent side portion 280, and the lower end 271 of the corner portion 270 curves downward in an arc from the linear lower end 281. The container body-side fitting portion 250 also curves downward at the corner portion 270 so as to follow the curved shape from the lower end 281 of the side portion 280 to the lower end 271 of the corner portion 270. Specifically, one end 251 of the container body-side fitting portion 250 is linear along the lower end 281 of the side portion 280, and the other end 252 of the container body-side fitting portion 250 curves downward along the lower end 271 of the corner portion 270. Furthermore, container body side fitting portions 250 are arranged on both sides of the corner portion 270, and the container body side fitting portions 250 on both sides are curved in an inverted V shape, in an arc downward along the lower end 271 of the corner portion 270. The other ends 252, which are the lowest parts of the curved portions of the container body side fitting portions 250, are not connected to each other and are spaced apart. Therefore, the spaced apart portions are not provided with the container body side fitting portions 250 and do not have a fitting function, and therefore form non-fitting portions 259.

[0026] Furthermore, at the corner portion 270 of the container body 200, a portion of the container body-side flange 230 is recessed inward to form a corner cut portion 279. In the side view shown in FIG. 7(b), the container body-side fitting portions 250 on both sides of the corner portion 270 are curved downward at the corner cut portion 279. Also, as shown in FIG. 7(b), in the side view, the lower end 271 of the corner portion 270 is curved downward from a connecting portion 272 with the lower end 281 of the adjacent side portion 280. However, as shown in FIG. 6(a), in the plan view, the lower end 271 of the corner portion 270 extends linearly from the connecting portions 272 on both sides. If the corner cut portion 279 of the corner portion 270 of the container body 200 has a recessed portion toward the inside of the container, stress will be concentrated inward at the recessed portion of the corner cut portion 279, making the corner portion 270 more likely to collapse. Therefore, by extending the lower end 271 of the corner portion 270 in a straight line across the connecting portions 272 on both sides, the corner portion 270 is made less likely to collapse inward. Also, as shown in Fig. 7(b), the container body side fitting portions 250 on both sides of the corner portion 270 are curved downward in side view, but as shown in Fig. 6(a), the container body side fitting portions 250 on both sides of the corner portion 270 are aligned in a straight line in plan view. This prevents stress generated when the container body side fitting portions 250 are fitted from concentrating on the inside of the corner portion 270, making the corner portion 270 less likely to collapse inward.

[0027] In addition, a leg portion 290 is provided on the lower end 271 side of the corner portion 270. This leg portion 290 is formed in a convex or concave shape extending outward from the side surface 220, and a lower end 292 of the leg portion 290 is configured to be able to abut against a placement surface or the like on which the packaging container 300 is placed, and an upper end 291 of the leg portion 290 is connected to the lower end 271 of the corner portion 270. In addition, the leg portion 290 is arranged so as to continue directly below the other end 252, which is the lowest part of the curved portion of the container body-side fitting portion 250.

[0028] The container body 200 is formed by sheet molding (e.g., vacuum molding, compressed air molding, hot plate molding) using a sheet-shaped synthetic resin with a thickness of approximately 0.1 mm to 1.0 mm (millimeters). For example, the material for the container body 200 may be polystyrene, polypropylene, polyethylene, A-PET, polylactic acid, or biaxially stretched versions of these.

[0029] Next, Figures 9 to 11 show the packaging container 300 in a state where the lid 100 is attached to the container body 200. Note that Figure 9 is an overall perspective view of the packaging container 300, Figure 10(a) is a plan view of the packaging container 300, Figure 10(b) is a side view of the packaging container 300 as seen from a corner portion 370, Figure 11(a) is an end view taken along line E-E, and Figure 11(b) is an end view taken along line F-F.

[0030] When the lid 100 is placed over the container body 200 and pressed downward, the lid 100 fits into the container body 200, sealing the packaging container 300. The lid flange 130 of the lid 100 and the container body flange 230 of the container body 200 are arranged so as to overlap one another vertically, preventing foreign matter from entering the packaging container 300 from the outside. When the lid 100 is fitted into the container body 200, the lid-side fitting portion 150 of the lid 100 fits into the container body-side fitting portion 250 of the container body 200 at the corner portion 370 of the packaging container 300, but because the lid-side fitting portion 150 and the container body-side fitting portion 250 are inclined downward at the corner portion 370, the pressing force applied during fitting tends to be concentrated downward and is easily transmitted to the bottom of the lid-side fitting portion 150 and the container body-side fitting portion 250. Therefore, the lid 100 can be fitted into the container body 200 with a light force, preventing the packaging container 300 from being crushed or damaged.

[0031] Furthermore, because the lid body-side fitting portion 150 of the lid body 100 and the container body-side fitting portion 250 of the container body 200 are curved downward at the corner portion 370, the pressing force applied during fitting is gradually concentrated downward, making it easy to fit the lid body 100 to the container body 200. Note that, although the lid body-side fitting portion 150 of the lid body 100 and the container body-side fitting portion 250 of the container body 200 are curved downward at the corner portion 370, this is not limitative, and as long as the lid body-side fitting portion 150 of the lid body 100 and the container body-side fitting portion 250 of the container body 200 are inclined downward at the corner portion 370, the lid body-side fitting portion 150 of the lid body 100 and the container body-side fitting portion 250 of the container body 200 may be inclined linearly downward at the corner portion 370 or have any other configuration.

[0032] Furthermore, at the corner portion 370 of the packaging container 300, a non-fitting portion 159 of the lid body 100 and a non-fitting portion 259 of the container body 200 are provided at the lowest portions of the sloped portions of the lid body-side fitting portion 150 of the lid body 100 and the container body-side fitting portion 250 of the container body 200, respectively. The lowest portion of the sloped portion is where stress applied during fitting is most concentrated, so a strong force is required to fit the lid body-side fitting portion 150 over the container body-side fitting portion 250 at this portion. However, by providing the non-fitting portion 159 of the lid body 100 and the non-fitting portion 259 of the container body 200 at the lowest portion of the sloped portion, and providing a location where the lid body-side fitting portion 150 and the container body-side fitting portion 250 do not fit together, the lid body 100 can be fitted to the container body 200 with a light force. In addition, the packaging container 300 has both a non-engaging portion 159 of the lid body 100 and a non-engaging portion 259 of the container body 200, but this is not limited to this, and it is sufficient to have either the non-engaging portion 159 of the lid body 100 or the non-engaging portion 259 of the container body 200.

[0033] In addition, legs 290 are provided below the lowest part of the inclined portion of container body-side fitting part 250 of container body 200. Therefore, the pressing force applied during fitting is transmitted downward along container body-side fitting part 250 and can be released from container body-side fitting part 250 to the installation surface or the like via legs 290, thereby preventing packaging container 300 from being crushed by the pressing force.

[0034] The packaging container of the present invention is not limited to the above examples, and various modifications and combinations are possible within the scope of the claims and the scope of the embodiments, and these modifications and combinations are also included in the scope of rights.

Claims

1. A packaging container having a polygonal shape in plan view and including a container body and a lid body, The container body includes a container body side flange and a container body side fitting portion on the container body side flange, the lid body includes a lid body side flange and a lid body side fitting portion that fits internally with the container body side fitting portion on the lid body side flange, A packaging container characterized in that the container body side fitting portion and the lid body side fitting portion are inclined downward at corner portions.

2. 2. The packaging container according to claim 1, characterized in that a non-engagement portion is provided at the bottom of the inclined portion of the container body side engaging portion or the lid side engaging portion in the corner portion, where the container body and the lid body do not engage with each other.

3. 3. The packaging container according to claim 1, wherein a leg portion is provided below the lowest part of the inclined portion of the fitting portion on the container body side.

4. A packaging container having a container body and a lid body, and having a square shape with cut corners in a plan view, with at least one corner portion recessed inward, The container body includes a container body side flange and a container body side fitting portion on the container body side flange, the lid body includes a lid body side flange and a lid body side fitting portion that fits internally with the container body side fitting portion on the lid body side flange, A packaging container characterized in that the container body side fitting portion and the lid body side fitting portion are inclined downward at the corner cut portions.

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