Packaging containers
The packaging container design addresses the issue of requiring a large force to remove the lid by incorporating non-adhered fitting step portions that utilize a lever principle, enabling easy removal and resealing without deformation.
Patent Information
- Application Number
- JP2020117463
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2020-07-08
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2040-07-08
AI Technical Summary
Existing packaging containers require a relatively large force to remove the lid, which can lead to deformation of the outer edge and reduced resealability.
The packaging container design features convex ridges on the container body and concave ridges on the lid, with a container-side fitting step portion and a lid-side fitting step portion provided at a lower position than the ridges. These step portions are not adhered to each other, allowing for easy fitting and enabling the lid to be removed with a light force using a lever principle.
The design allows for the lid to be removed with a light force while maintaining high sealing properties, preventing deformation of the outer edge and ensuring excellent resealability.
Smart Images
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Abstract
Description
[Technical field]
[0001] The present invention relates to a packaging container comprising a container body and a lid. [Background technology]
[0002] 2. Description of the Related Art Conventionally, packaging containers consisting of a container body for containing food such as prepared dishes and a lid that can be attached to the container body have been used in supermarkets, convenience stores, and the like.
[0003] For example, the packaging container in Patent Document 1 is a packaging container that includes a container body with convex ribs and a lid body with concave ribs, and the concave ribs of the lid body are overlapped on the convex ribs of the container body and bonded to each other by thermocompression bonding, etc., so that liquids in food stored in the container do not leak to the outside and the container can be stored for a long time. Furthermore, the inside of the convex ribs of the container body and the inside of the concave ribs of the lid body are provided with mating parts that can fit into each other, so that even after the lid body is removed and the food is used, the mating parts allow the lid body to be fitted back into the container body.
[0004] However, in the packaging container of Patent Document 1, in order to provide high sealing performance, the concave ridges of the lid are overlapped with the convex ridges of the container body and are firmly bonded to each other by thermocompression bonding or the like, so a relatively large force is required to remove the lid. Furthermore, the part to which a large force is applied (for example, the flange on the outer edge) is deformed, making it difficult to refit the lid to the container body, resulting in a problem of reduced resealability. [Prior art documents] [Patent documents]
[0005] [Patent Document 1] Patent No. 5041408 Summary of the Invention [Problem to be solved by the invention]
[0006] In view of the above problems, the present invention provides a packaging container having a lid that can be removed with a light force and has good resealability. [Means for solving the problem]
[0007] In order to solve the above problem, the packaging container of claim 1 of the present invention is a packaging container comprising a container body having a convex rib and a lid body having a concave rib, and the concave rib of the lid body is overlapped on the convex rib of the container body and adhered to each other, wherein the container body has a container side mating step that protrudes outwardly from the convex rib and is positioned lower than the convex rib, and the lid body has a lid side mating step that protrudes outwardly from the concave rib and is positioned lower than the concave rib, the container side mating step and the lid side mating step are not adhered to each other but can be fitted to each other, and the upper wall of the convex rib is a flat surface and is overlapped on and adhered to the concave rib.
[0008] According to the above feature, when the lid is pulled up and removed, first, the lid-side fitting step and the container-side fitting step are disengaged, and then, by the principle of leverage (type 2), the adhesion between the concave stripe and the convex stripe can be pulled apart with a light force. As a result, even if the packaging container has high sealing performance due to the adhesion between the concave stripe and the convex stripe, the lid can be removed with a light force. In addition, since the lid can be removed with a light force, the outer edge of the packaging container can be prevented from being deformed by the force applied when the lid is removed, and the resealability of the packaging container is good. Furthermore, since the lid-side fitting step and the container-side fitting step are located at a lower position than the concave stripe and the convex stripe, the outside of the concave stripe and the convex stripe are stepped, which increases the strength and makes them less likely to deform, and effectively prevents the outer edge of the packaging container from being deformed by the force applied when the lid is removed, and the resealability of the packaging container is good.
[0009] Furthermore, the packaging container of claim 2 of the present invention is characterized in that the container side fitting step has a planar container side gripping portion on the outside, and the lid side fitting step has a planar lid side gripping portion on the outside.
[0010] According to the above feature, the lid can be easily removed from the container body by pinching the lid-side gripping portion and the container-side gripping portion with fingers.
[0011] Furthermore, claims of the present invention 1 In the packaging container according to the present invention, the container-side fitting step portion is provided on the outer wall. , in plan view The container-side fitting portion is recessed inward, and the lid-side fitting step portion is formed on the outer wall. , in plan view The container has a lid-side fitting portion recessed inward, and the container-side fitting portion and the lid-side fitting portion fit together.
[0012] According to the above feature, the lid-side fitting step and the container-side fitting step can be fitted together more securely, which further improves the resealability of the packaging container.
[0013] Furthermore, claims of the present invention 3 The packaging container according to the present invention is characterized in that the packaging container has a polygonal shape when viewed in a plane, and the container side mating step and the lid side mating step are provided in at least one corner of the packaging container.
[0014] According to the above-mentioned feature, the force when removing the lid is concentrated on the corners of the packaging container that is polygonal in plan view, making it easier to remove the lid. Also, when the lid is reattached, the fitting step on the lid side and the fitting step on the container side fit securely at the corners of the packaging container, so that the packaging container has good airtightness. Effect of the Invention
[0015] The packaging container of the present invention has a lid which can be removed with a light force and has good resealability. [Brief description of the drawings]
[0016] [Figure 1] FIG. 2(a) is a plan view of a lid for a packaging container according to the present invention, (b) is a side view of the lid, and (c) is an AA end view. [Diagram 2]FIG. 2(a) is a plan view of a container body of the packaging container of the present invention, (b) is a side view of the container body, and (c) is a BB end view. [Diagram 3] FIG. 2(a) is a plan view of the packaging container of the present invention, (b) is a side view of the packaging container, and (c) is a CC end view. [Figure 4] 1A is an enlarged plan view of the area around the lid-side mating step when opening the packaging container of the present invention, and FIG. 1B is an enlarged side view of the area around the lid-side mating step of the packaging container. [Diagram 5] FIG. 4(b) is a DD end view of FIG. [Explanation of symbols]
[0017] 100 Lid 150 groove 160 Lid side fitting step 200 Container body 250 Convex stripe 260 Container side fitting step 300 Packaging containers DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0018] Hereinafter, an embodiment 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 container body of the packaging container is placed on a horizontal surface with the opening side facing up, and "downward" refers to a direction that faces downward in the vertical direction.
[0019] First, Fig. 1 shows a lid 100 according to the present invention. Fig. 1(a) is a plan view of the lid 100, Fig. 1(b) is a side view of the lid 100, and Fig. 1(c) is an AA end view.
[0020] As shown in Fig. 1, the lid body 100 has a generally rectangular shape in plan view with four corners 110, and includes a flat top plate 120, a side wall 130 that continues upward from an edge 121 of the top plate 120, a flat upper surface 140 that extends outward from the side wall 130, and a concave streak 150 that protrudes upward from the upper surface 140. The side wall 130, the upper surface 140, and the concave streak 150 are provided continuously or intermittently over the entire circumference of the lid body 100 in the circumferential direction. Although the lid body 100 has a generally rectangular shape in plan view, this is not limited thereto, and it may have any shape, such as a generally polygonal shape in plan view, a generally circular shape in plan view, or a generally elliptical shape in plan view.
[0021] The concave 150 is formed by the opposing inner wall 151 and outer wall 152 and the upper wall 153 connecting the inner wall 151 and the outer wall 152, so that the inner side is concave. The inner side of the concave 150, i.e., the groove 154 surrounded by the inner wall 151, the outer wall 152, and the upper wall 153, is overlapped with the convex rib of the container body described later, and the two are bonded together. The concave 150 extends in an annular shape in the circumferential direction of the lid 100, and is configured to overlap the annular convex rib of the container body described later over the entire circumference. The concave 150 is formed continuously in an annular shape in the circumferential direction of the lid 100, but is not limited thereto, and may be formed partially in the circumferential direction of the lid 100.
[0022] The corner 110 also includes a lid-side fitting step 160 that protrudes outward from the groove 150 and is provided at a lower position below the groove 150. Specifically, the lid-side fitting step 160 is provided at a lower position than the upper wall 153 of the groove 150 and includes a flat upper wall 161 extending outward and an outer wall 162 extending downward from the upper wall 161. Since the lid-side fitting step 160 protrudes outward, an inner side 164 of the lid-side fitting step 160 is recessed to the side and is concave, so that a container-side fitting step of the container body, which will be described later, can be fitted inside. Furthermore, the approximate center of the outer wall 162 is a lid-side fitting part 163 that is recessed inward, so that it can be fitted with a container-side fitting part provided in the container-side fitting step of the container body, which will be described later. The lid-side fitting step 160 also includes a flat lid-side gripping portion 170 that extends outward from the lower end of the outer wall 162 .
[0023] In addition, since the lid side fitting step 160 has a shape including an upper wall 161 and an outer wall 162, the strength of the lid side fitting step 160 itself is strong and difficult to deform. In addition, the lid side fitting step 160 has a shape of two mountains lined up in a plan view, but is not limited to this, and may have any shape as long as it protrudes outward from the concave 150, is provided at a position lower than the concave 150, and can be fitted with the container side fitting step of the container body described later. In addition, the lid side fitting step 160 is provided at all four corners 110 of the lid 100, but is not limited to this, and the lid side fitting step 160 may be provided at at least one corner 110. In addition, the lid side fitting step 160 is provided at the corner 110, but is not limited to this, and may be provided at any point on the outer edge of the lid 100.
[0024] Next, Fig. 2 shows a container body 200 to be covered by the lid 100 of the present invention. Fig. 2(a) is a plan view of the container body 200, Fig. 2(b) is a side view of the container body 200, and Fig. 2(c) is a BB end view.
[0025] As shown in Fig. 2, the container body 200 is a shallow dish type opening upward, has a generally rectangular shape in plan view with four corners 210, and includes a flat bottom wall 220, a side wall 230 formed to rise from an edge 221 of the bottom wall 220, a flat upper surface 240 extending outward from the side wall 230, and a convex rib 250 protruding upward from the upper surface 240. The side wall 230, the upper surface 240, and the convex rib 250 are provided continuously or intermittently over the entire circumference in the circumferential direction of the container body 200. Although the container body 200 is generally rectangular in plan view, this is not limited thereto, and it may be of any shape, such as a generally polygonal shape in plan view, a generally circular shape in plan view, or a generally elliptical shape in plan view.
[0026] The convex rib 250 is formed in an upwardly convex shape by the opposing inner wall 251 and outer wall 252, and the upper wall 253 connecting the inner wall 251 and the outer wall 252. When the lid 100 is attached to the container body 200, the convex rib 250 is inserted into the groove 154 of the concave rib 150 of the lid 100, and the convex rib 250 and the concave rib 150 overlap each other vertically and are bonded to each other. The convex rib 250 extends in an annular shape in the circumferential direction of the container body 200, and is configured to overlap the concave rib 150 of the lid 100 over the entire circumference. The convex rib 250 is formed in an annular shape continuously in the circumferential direction of the container body 200, but is not limited thereto, and may be formed partially in the circumferential direction of the container body 200.
[0027] The corner portion 210 also includes a container-side fitting step 260 that protrudes outward from the protruding strip 250 and is provided at a lower position below the protruding strip 250. Specifically, the container-side fitting step 260 is provided at a lower position than the upper wall 253 of the protruding strip 250 and includes a flat upper wall 261 extending outward and an outer wall 262 extending downward from the upper wall 261. Since the container-side fitting step 260 protrudes outward, it can be fitted into the inner side 164 of the lid body side fitting step 160 of the lid body 100 when the lid body 100 is attached to the container body 200. Furthermore, the approximate center of the outer wall 262 is a container-side fitting portion 263 that is recessed inward, and it can be fitted into the lid body side fitting portion 163 of the lid body side fitting step 160 when the lid body 100 is attached to the container body 200. The container-side fitting step 260 also includes a flat container-side gripping portion 270 that extends outward from the lower end of the outer wall 262 .
[0028] In addition, since the container side fitting step 260 has a shape including the upper wall 261 and the outer wall 262, the container side fitting step 260 itself has a strong strength and is not easily deformed. In addition, the container side fitting step 260 has a shape of two mountains lined up in a plan view, but is not limited to this, and may have any shape as long as it protrudes outward from the convex strip 250, is provided at a position lower than the convex strip 250, and can be fitted with the lid body side fitting step 160 of the lid body 100. In addition, the container side fitting step 260 is provided at all four corners 210 of the container body 200, but is not limited to this, and the container side fitting step 260 may be provided at at least one corner 210. In addition, the container side fitting step 260 is provided at the corner 210, but is not limited to this, and may be provided at any point on the outer edge of the container body 200.
[0029] Furthermore, the lid body 100 and the container body 200 are formed by sheet molding (e.g., vacuum forming, compressed air forming, hot plate forming) using a sheet-like material having a thickness of approximately 0.1 mm to 1.00 mm. For example, the material for the lid body 100 and the container body 200 may be polystyrene, polypropylene, polystyrene, A-PET, polylactic acid, or biaxially oriented versions of these.
[0030] Next, a packaging container 300 in which the lid 100 of the present invention is attached to the container body 200 will be described with reference to Fig. 3. Fig. 3(a) is a plan view of the packaging container 300, Fig. 3(b) is a side view of the packaging container 300, and Fig. 3(c) is a CC end view.
[0031] As shown in Fig. 3, the lid 100 is placed over the container body 200, and the concave stripes 150 of the lid 100 are bonded to the convex stripes 250 of the container body 200 over the entire circumference of the packaging container 300 in the circumferential direction, thereby sealing the packaging container 300. Specifically, a thermoplastic adhesive or a thermosetting adhesive sheet or the like is interposed between the flat surface of the upper wall 253 of the convex stripes 250 of the container body 200 and the flat back surface of the upper wall 153 of the concave stripes 150 of the lid 100, so that the concave stripes 150 are superimposed on the convex stripes 250. Furthermore, the upper wall 153 of the concave stripes 150 is pressed downward from above the lid 100 with a flat heating plate or the like, and the upper wall 153 of the concave stripes 150 and the upper wall 253 of the convex stripes 250 are thermally compressed to seal them. As a result, the concave ribs 150 of the lid 100 are firmly attached to the convex ribs 250 of the container body 200, providing high sealing performance to the packaging container 300. This prevents the liquid content contained in the container body 200 from leaking out and prevents foreign matter from entering the packaging container 300 from the outside.
[0032] Although a thermoplastic adhesive or a thermosetting adhesive sheet, etc. is interposed between the surface of the upper wall 253 of the convex rib 250 and the back surface of the upper wall 153 of the concave rib 150, this is not limited to this, and a thermoplastic adhesive or a thermosetting adhesive sheet, etc. may also be interposed between the outer wall 152 of the concave rib 150 and the outer wall 252 of the convex rib 250, and a thermoplastic adhesive or a thermosetting adhesive sheet, etc. may be interposed at any location between the concave rib 150 and the convex rib 250 as long as the concave rib 150 and the convex rib 250 can be adhered to each other.
[0033] In addition, since the lid body side fitting step 160 of the lid body 100 fits into the container side fitting step 260 of the container body 200, it is possible to prevent fingers or the like from accidentally getting between the concave strip 150 and the convex strip 250, which would inadvertently peel off the adhesion between the concave strip 150 and the convex strip 250. Furthermore, since the lid body side fitting portion 163 of the lid body side fitting step 160 and the container side fitting portion 263 of the container side fitting step 260 fit into each other, the fit between the lid body side fitting step 160 and the container side fitting step 260 is made stronger.
[0034] The lid body side fitting step 160 is provided at a lower position than the concave streak 150, and the container side fitting step 260 is also provided at a lower position than the convex streak 250. Therefore, when the convex streak 250 of the container body 200 and the concave streak 150 of the lid body 100 are thermocompressed to each other with a thermoplastic adhesive or a thermosetting adhesive sheet or the like interposed between them, the lid body side fitting step 160 and the container side fitting step 260, which are one step lower than the concave streak 150 and the convex streak 250, are not easily affected by heat, and the lid body side fitting step 160 and the container side fitting step 260 can easily be maintained in a state where they are not adhered to each other. In particular, when a thermoplastic adhesive or a thermosetting adhesive sheet, etc. is interposed between the surface of the upper wall 253 of the convex rib 250 and the back surface of the upper wall 153 of the concave rib 150, and the upper wall 153 of the concave rib 150 is pressed downward from above the lid body 100 with a flat heating plate, etc., and the upper wall 153 of the concave rib 150 and the upper wall 253 of the convex rib 250 are thermally compressed to seal them, the flat heating plate does not come into contact with the lid body side fitting step 160 and the container side fitting step 260, which are one step lower than the concave rib 150 and the convex rib 250, so that the lid body side fitting step 160 and the container side fitting step 260 are less affected by the thermal compression, and the lid body side fitting step 160 and the container side fitting step 260 can easily be maintained in a state where they are not adhered to each other. Although the concave ribs 150 and the convex ribs 250 are bonded to each other by thermocompression, this is not limited to this, and any other method may be used as long as the concave ribs 150 and the convex ribs 250 can be bonded to each other, such as using an adhesive that can bond the concave ribs 150 and the convex ribs 250 to each other at room temperature.
[0035] Next, a method for opening the sealed packaging container 300 will be described with reference to Figures 4 and 5. Figure 4(a) is an enlarged plan view of the periphery of the lid body side fitting step 160 when opening the packaging container 300, Figure 4(b) is an enlarged side view of the periphery of the lid body side fitting step 160 of the packaging container 300, and Figure 5 is a DD end view of Figure 4(a).
[0036] As shown in Fig. 4 and Fig. 5, when removing and opening the lid body 100 of the packaging container 300, for example, the lid body side gripping portion 170 of the lid body 100 is pinched with the index finger F1 and thumb F2 of one hand, and the container side gripping portion 270 of the container body 200 is pinched with the thumb F3 and index finger F4 of the other hand, and the lid body side gripping portion 170 of the lid body 100 is pulled upward. At this time, the flat lid body side gripping portion 170 of the lid body 100 is deformed so as to bend upward, but the stepped lid body side fitting step 160 is not easily deformed. Similarly, the flat container side gripping portion 270 of the container body 200 is deformed so as to bend downward, but the stepped container side fitting step 260 is not easily deformed.
[0037] When the lid-side gripping portion 170 of the lid 100 is pulled upward, the lid-side fitting step 160 is also lifted upward. At this time, the lid-side fitting step 160 is fitted into the container-side fitting step 260 but is not bonded, so the fitting between the lid-side fitting step 160 and the container-side fitting step 260 is easily released. Furthermore, the upward force applied to the lid-side gripping portion 170 of the lid 100 is transmitted firmly and efficiently to the concave strip 150 because the lid-side fitting step 160 is not easily deformed. In addition, when removing the lid 100, the container-side gripping portion 270 is pinched with fingers to hold the container body 200 so that it does not move, but because the container-side fitting step 260 is not easily deformed, the container-side fitting step 260 and the adjacent convex strip 250 are also not easily deformed, and the lid 100 can be easily removed.
[0038] Then, when the lid-side gripping portion 170 of the lid 100 is continuously pulled upward, the concave strip 150 adjacent to the lid-side fitting step 160 is peeled off from the convex strip 250 of the container body 200. At this time, as shown in Figs. 4 and 5, the principle of leverage (type 2) is at work, so that the concave strip 150 can be easily peeled off from the convex strip 250 with a light force. Specifically, when the lid 100 is pulled upward, the part where the force is most directly applied, that is, the vicinity of the outer end of the lid-side fitting step 160, becomes the force point P1. Then, the part where the concave strip 150 starts to be peeled off from the convex strip 250, that is, the vicinity of the outer end of the concave strip 150 adjacent to the lid-side fitting step 160, becomes the load point (point of action) P2. Furthermore, the end of the part where the concave strip 150 is peeled off from the convex strip 250, i.e., the vicinity of the inner end of the concave strip 150 farthest from the lid-side fitting step 160, becomes the fulcrum P3. Then, according to the principle of leverage (type 2), the upward force G1 applied at the force point P1 becomes an upward force G2 greater than the force G1 at the load point P2. Due to this upward force G2, the concave strip 150 is gradually peeled off from the convex strip 250 from the outer load point P2 side to the inner fulcrum P3. As a result, the concave strip 150 of the lid 100 can be easily peeled off from the convex strip 250 with a light force.
[0039] On the other hand, when the lid body 100 is removed from the container body 200 to open the packaging container 300, and then the container body 200 is closed again with the lid body 100 to reseal the packaging container 300, the lid body 100 is placed over the container body 200, and the concave stripes 150 of the lid body 100 and the convex stripes 250 of the container body 200 overlap over the entire circumferential direction of the packaging container 300. At that time, even if the concave stripes 150 of the lid body 100 and the convex stripes 250 of the container body 200 are not bonded to each other, the lid body side fitting step 160 of the lid body 100 and the container side fitting step 260 of the container body 200 are firmly fitted together, so that the lid body 100 will not come off inadvertently, and the packaging container 300 can be resealed.
[0040] In this way, the packaging container 300 of the present invention has the lid body side fitting step 160 and the container side fitting step 260 that protrude outward from the mutually bonded concave ribs 150 and convex ribs 250, and the lid body side fitting step 160 and the container side fitting step 260 are not bonded to each other and can be fitted to each other. Therefore, when the lid body 100 is pulled up and removed, the lid body side fitting step 160 and the container side fitting step 260 are first disengaged from each other, and then, by the principle of leverage (type 2), the bond between the concave ribs 150 and the convex ribs 250 adjacent to the lid body side fitting step 160 and the container side fitting step 260 can be pulled apart with a light force. As a result, even though the packaging container 300 has a high sealing performance due to the bond between the concave ribs 150 and the convex ribs 250, the lid body 100 can be removed with a light force. In addition, since the lid body 100 can be removed with a light force, it is possible to prevent the outer edge of the packaging container 300 (for example, the concave ribs 150 and the convex ribs 250, and the areas around the lid body side mating step 160 and the container side mating step 260) from being deformed by the force applied when the lid body 100 is removed, thereby improving the resealability of the packaging container 300.
[0041] 5, the lid body side fitting step 160 and the container side fitting step 260 are provided at a lower position than the concave rib 150 and the convex rib 250, so that the outside of the concave rib 150 and the convex rib 250 is stepped, which increases the strength and makes it difficult to deform. Therefore, it is possible to effectively prevent the outer edge of the packaging container 300 (the concave rib 150 and the convex rib 250, and the periphery of the lid body side fitting step 160 and the container side fitting step 260) from being deformed by the force when the lid body 100 is removed, and the resealability of the packaging container 300 is improved. In addition, since the lid body side fitting step 160 and the container side fitting step 260 are difficult to deform, they are the parts to which the force is most directly applied when the lid body 100 is pulled upward, so that the vicinity of the outer end of the lid body side fitting step 160 is likely to act as the force point P1 in the principle of leverage (type 2).
[0042] Furthermore, when the convex rib 250 of the container body 200 and the concave rib 150 of the lid body 100 are thermocompressed together with a thermoplastic adhesive, a thermosetting adhesive sheet, or the like interposed between them, the lid body side mating step 160 and the container side mating step 260, which are one step lower than the concave rib 150 and the convex rib 250, are less susceptible to the effects of heat, and the lid body side mating step 160 and the container side mating step 260 can easily be maintained in a state where they are not adhered to each other.
[0043] Furthermore, since the lid body side fitting step 160 has a flat lid body side gripping portion 170 on the outside, and the container side fitting step 260 has a flat container side gripping portion 270 on the outside, the lid body 100 can be easily removed from the container body 200 by pinching the lid body side gripping portion 170 and the container side gripping portion 270 with fingers. Note that the lid body side gripping portions 170 are provided at each corner 110 of the lid body 100, and the container side gripping portions 270 are provided at each corner 210 of the container body 200, but this is not limited thereto, and at least one lid body side gripping portion 170 may be provided at any position on the outer edge of the lid body 100, and at least one container side gripping portion 270 may be provided at any position on the outer edge of the container body 200.
[0044] In addition, the lid side fitting step 160 has a lid side fitting portion 163 recessed inward in the outer wall 162, and the container side fitting step 260 has a container side fitting portion 263 recessed inward in the outer wall 262, so that the lid side fitting step 160 and the container side fitting step 260 can be more firmly fitted together, which further improves the resealability of the packaging container 300. In addition, as shown in Fig. 4(a), since the lid side fitting portion 163 and the container side fitting portion 263 are recessed inward, when removing the lid 100, part of a finger (for example, the index finger F1) can be placed in the recessed portion, making it easier to pinch the outer edge of the lid 100 and apply force, which makes it even easier to remove the lid 100.
[0045] Although the lid side fitting portion 163 is formed on the lid side fitting step 160 and the container side fitting portion 263 is formed on the container side fitting step 260, this is not limited to this, and as long as the lid side fitting portion 163 and the container side fitting portion 263 can fit together, the lid side fitting portion 163 may be provided at any position on the outer edge of the lid body 100, and the container side fitting portion 263 may also be provided at any position on the outer edge of the container body 200, to improve the resealability of the packaging container 300.
[0046] In addition, the packaging container 300 has a polygonal shape in plan view, and the lid body side fitting step 160 and the container side fitting step 260 are provided at at least one corner of the packaging container 300 (specifically, corners 110 and 210). Therefore, the force when removing the lid body 100 is concentrated at the corners of the packaging container 300 having a polygonal shape in plan view, so that the lid body 100 can be removed more easily. In addition, when the lid body 100 is reattached, the lid body side fitting step 160 and the container side fitting step 260 are firmly fitted together at the corners of the packaging container 300, so that the packaging container 300 has good airtightness.
[0047] 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. The container has a container body with a convex strip and a lid body with a concave strip, A packaging container in which the convex strips of the container body are overlapped with the concave strips of the lid body and bonded to each other, The container body includes a container-side fitting step portion that protrudes outward from the protrusion and is provided at a position lower than the protrusion, The lid includes a lid-side fitting step portion that protrudes outward from the recessed strip and is provided at a position lower than the recessed strip, The container-side fitting step and the lid-side fitting step are not bonded to each other and can be fitted to each other, The upper wall of the convex strip is a flat surface, and is overlapped and bonded to the concave strip; The container-side fitting step includes a container-side fitting portion on an outer wall, the container-side fitting portion being recessed inward in a plan view, A packaging container characterized in that the lid side fitting step has a lid side fitting portion on its outer wall that is recessed inward when viewed in a plane, and the container side fitting portion and the lid side fitting portion fit together.
2. The container-side fitting step has a flat container-side gripping portion on an outer side, 2. The packaging container according to claim 1, wherein the lid-side fitting step has a flat lid-side gripping portion on an outer side.
3. The packaging container has a polygonal shape in a plan view, 3. The packaging container according to claim 1, wherein the container-side fitting step and the lid-side fitting step are provided in at least one corner of the packaging container.
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