JP2013014370A - Lid for packaging container, and packaging container using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid whose appearance is not damaged by deformation and which is strong enough to withstand against a load onto its top panel, and to provide a packaging container using the lid.SOLUTION: This relates to the lid 1 for a packaging container which is polygonal in planar view and is provided with a top panel 11, a sidewall 12 joined to the top panel 11 and a flange 13 joined to the sidewall 12. On the peripheral edge of the top panel 11 and on the corner X of the polygon, a slide-preventing protrusion 14 is formed along each side forming the corner. The height of declination-preventing protrusion 14 is small at the tip side of the corner X, increases as it moves away from the tip along the side and then decreases.

Description

  The present invention relates to a lid for a packaging container and a packaging container using the lid. In particular, the present invention relates to a lid formed from a synthetic resin sheet, a container main body fitted to the lid, and a packaging container composed of the lid and the container main body.

  In recent years, bento boxes, side dishes, etc. have been transported and sold by putting them in specific packaging containers, and packaging containers therefor have also been manufactured in a wide variety. As this packaging container, a lid using a synthetic resin is formed and used because the one using the lid is hygienic.

  By the way, the lids of these packaging containers are made of synthetic resin sheets (for example, polyethylene terephthalate (A-PET, stretched PET, etc.), stretched polystyrene sheets (OPS), sheets made of olefin resins such as polypropylene, and the like. Sheet) as a material, and is produced by mature forming such as vacuum forming, pressure forming, double-sided vacuum forming, hot plate forming and the like. These synthetic resin sheets are required to be lighter by making the thickness thinner. In particular, when packaging containers in which the lid is fitted to the container main body are stored in a transport box or displayed on a display shelf of a store, they are stacked in, for example, 3 to 5 levels. When carrying out such stacking work or when a consumer tries to pick up a container for purchase, such a thin synthetic resin sheet is covered with a part of the lid. In particular, deformation is likely to occur at the corner (corner) of the lid of the packaging container.

Japanese Utility Model Publication No. 54-104332

  In such a packaging container, for example, in Patent Document 1, as shown in FIG. 5, substantially L-shaped protrusions 101 having the same height are provided at the four corners of the lid of the packaging container 100. Is disclosed.

  However, with such a substantially L-shaped projection 101, the projection 101 is deformed (depressed) particularly when an external force is applied to the corner portion inadvertently, and this deformation does not return to its original state. The appearance of the container 100 may be impaired. And there existed a problem of reducing a commercial value by this. In addition, when stacking packaging containers at a store, there is a problem that the stacking work is poor because the stacking container is caught on the substantially L-shaped protrusion 101 of the container positioned on the lower side.

  On the other hand, a thick synthetic resin sheet is used in order to prevent the top plate portion of the lid from being bent due to a load such as food contained in the container body in spite of the request for weight reduction. There was a conflicting restriction that the lid had to be molded.

  Accordingly, it is an object of the present invention to provide a lid body that does not impair the appearance due to deformation and that has improved strength against a load at the top plate portion, and a packaging container using the lid body.

    The inventor of the present application improved the strength against the load at the top plate portion of the lid body, improved the workability of stacking at the storefront, and once deformed in the container molded with a very thin synthetic resin sheet. As a result of various studies on how to immediately restore the original shape, the present invention has been completed.

  That is, in the present invention, a packaging container having a polygonal shape in plan view, including a top plate portion, a side wall portion connected to the top plate portion, and a flange portion connected to the side wall portion. In the lid body, a protrusion for preventing misalignment is provided at each of the corners of the polygon, which is a peripheral portion of the top plate portion, along each side forming the corner. Is characterized in that the protrusion height is low at the tip end side of the corner portion, becomes higher as it goes away from the tip end along the side, and then gradually decreases.

  In this way, the protrusion for preventing misalignment is formed such that the protrusion height is low at the tip end side of the corner portion, becomes higher as it goes away from the tip end along the side, and then gradually decreases. The corners are difficult to dent due to inadvertent external force. In addition, when stacking at a store or the like, the container placed on the top is not easily caught. In addition, even when the above-mentioned inadvertent external force is applied and it is once deformed, it is immediately restored to its original shape. In addition, since the protrusions for preventing misalignment have two projecting heights across the tip of the corner, misalignment occurs even when a plurality of food containers and the like attached to the container body are stacked. It is hard to tilt or tilt.

  In the present invention, it is preferable that a boundary concave portion that is recessed in a direction opposite to a protruding direction of the deviation preventing projection is provided at a boundary between the flat portion of the top plate portion and the deviation preventing projection.

  Thus, the provision of the boundary recesses can further improve the strength of the corners of the lid, which is the most loaded (stress) when the packaging containers are stacked.

  Moreover, in the present invention, the lid body and a container body to which the lid body is attached are provided, and the lid body is formed on each side forming the corner portion at the flange portion at the polygonal corner portion. A hill portion protruding in the same direction as the protrusion for preventing misalignment is provided, and the container body is provided with a flange portion having a shape substantially coinciding with the shape of the hill portion. Features a container.

  Thus, the strength of the corners in the lid and the container main body, which is the most loaded (stress) when stacking the packaging containers, is provided by providing the hill portion on the lid and the flange on the container main body. Can be further improved.

  According to the present invention, the deformation does not impair the appearance, and in particular, even if the protrusion for preventing misalignment is once deformed, it has a function of immediately restoring the original shape, and the top plate portion It is possible to provide a lid that has sufficient strength against a load and that can reliably prevent displacement when the lid is attached to the container body and stacked, and a packaging container using the lid.

It is a perspective view which shows a cover body among the containers for packaging which concern on one Embodiment of this invention. It is a perspective view which shows a container main body among the containers for packaging which concern on one Embodiment of this invention. The principal part of the cover which concerns on one Embodiment of this invention is shown, (a) is an expansion perspective view, (b) is an expansion vertical end view in the longitudinal direction which passes the top part of both-sides protrusion, (c) is both-side protrusion It is an expansion vertical end view in the width direction which passes through the top part. It is a perspective view which shows the cover body of the packaging container which concerns on other embodiment. It is a perspective view which shows the cover body about an example of the conventional packaging container.

  A packaging container according to an embodiment of the present invention will be described with reference to the drawings. In the following positional relationship expression, “upper and lower” means the upper and lower directions when the lid and the container body are arranged in the directions shown in FIGS. 1 and 2, and “inside and outside” means the packaging container. The direction toward the periphery of the packaging container is defined as the outward direction, and the opposite direction is defined as the inward direction.

[Packaging containers]
This packaging container comprises a lid 1 shown in FIG. 1 and a container body 2 shown in FIG. As shown in FIG. 2, the container body 2 has an opening on the upper side, and can accommodate a stored item from the opening. The lid 1 is detachable from the container body 2. When the lid 1 is attached to the container main body 2, an accommodation space for accommodating the contents is formed between the lid 1 and the container main body 2.

  The packaging container has a polygonal shape in plan view. In the present embodiment, the outer shapes of the lid body 1 and the container body 2 constituting the packaging container are rectangular shapes with chamfered corners. Note that the “polygon” in the present invention refers to all figures composed of vertices and sides extending from the vertices. The sides are not limited to straight sides but may be curved sides. Further, the shape may not be symmetrical (line symmetry, point symmetry). Further, the apexes are not necessarily limited to those having corners formed, and may be chamfered or rounded as in the present embodiment.

  The lid 1 and the container body 2 of the packaging container are formed by thermoforming a synthetic resin sheet. Examples of the synthetic resin sheet include sheets of olefin resins such as polyethylene terephthalate, polystyrene, and polypropylene, and stretched sheets obtained by appropriately stretching these. Examples of thermoforming include vacuum forming, pressure forming, double-sided vacuum forming, and hot plate forming. And as the container main body 2, the synthetic resin sheet | seat which made the said synthetic resin foam can be formed by thermoforming the laminated sheet which laminated | stacked the synthetic resin sheet | seat suitably on these. Moreover, as the lid body 1, it is preferable to use a synthetic resin sheet that becomes transparent after molding.

[Lid]
Next, the lid 1 will be described. The lid 1 is formed so as to cover the opening of the container body 2. Specifically, as shown in FIG. 1, the lid body 1 includes a top plate portion 11, a lid side wall portion 12, and a lid flange portion 13.

  The top plate 11 is formed so as to be positioned above the opening of the container body 2 when attached to the container body 2. In the top plate portion 11 of the present embodiment, a flat portion 111 excluding a portion where a deviation preventing projection 14 (described later) is formed is a surface extending in the horizontal direction. The top plate 11 is formed in a shape corresponding to the opening of the container body 2 (that is, a rectangular shape with four corners chamfered in plan view).

  Most of the top plate portion 11 is a flat surface portion 111, and as much as possible, an uneven portion or a step is not provided. And the top plate part 11 is made transparent. For this reason, when the cover body 1 is attached to the container main body 2, the visibility from above can be made favorable. Therefore, the quality (for example, beauty, deliciousness, freshness) etc. of the contents of the packaging container can be sufficiently appealed to consumers.

  Further, the top plate portion 11 is configured such that the peripheral edge of the top plate portion 11 is located at a position outward from the peripheral edge of the bottom surface portion 21 in the container main body 2 in the closed state. And the periphery of the top-plate part 11 is made to overlap with the cover body side wall part 12 in planar view. That is, the area of the top plate portion 11 is larger than the area of the region surrounded by the periphery of the bottom surface portion 21. Thus, by making the area of the top plate part 11 larger than the area of the bottom face part 21, the area of the flat part 111 is also increased, so that the visibility from above can be improved.

  The lid side wall portion 12 is formed to be connected to the top plate portion 11. The lid side wall part 12 has a surface (slope) extending outward and downward from the periphery of the top plate part 11. A reinforcing rib 121 is provided in the center of a surface along each side of the rectangle in the plan view of the lid body 12 (side excluding the chamfered portion, hereinafter the same). The reinforcing rib 121 is a recess formed inwardly from the surface of the lid side wall portion 12, and is provided from the upper end to the lower end of the lid side wall portion 12. By forming the reinforcing rib 121 on the lid side wall portion 12, the strength of the lid 1 against the downward external force applied to the lid 1 can be improved. However, in the present invention, the formation of the reinforcing rib 12 is not essential, and may be omitted, for example, as shown in FIG.

  In addition, a substantially cubic blocking prevention protrusion 122 that protrudes outward from the surface of the lid side wall 12 is provided at the lower end of the lid side wall 12. This blocking prevention protrusion 122 is a gap between the plurality of stacked lid bodies 1 when the plurality of lid bodies 1... 1 are stacked (stacked) in the step after the lid body 1 is thermoformed. By providing, the plurality of lids 1 are prevented from coming into close contact with each other and becoming difficult to separate. Due to the presence of the anti-blocking protrusion 122, it is easy to separate the plurality of overlapped lid bodies 1 into individual lid bodies 1. The blocking prevention protrusions 122 are provided at different positions for each of the plurality of lids 1 that are simultaneously molded from the synthetic resin sheet. Therefore, since it can prevent that the blocking prevention protrusion 122 in the some cover body 1 shape | molded simultaneously and overlapped after that does not exist in the same position, it can prevent effectively that the cover bodies 1 adhere.

  The blocking prevention protrusion 122 of this embodiment is provided one by one on the surface along each side of the rectangle in plan view in the lid body side wall part 12. In the present invention, the formation of the anti-blocking protrusion 122 is not essential. For example, it may not be formed as shown in FIG. Moreover, when forming the blocking prevention protrusion 122, you may determine the formation quantity per cover body 1 suitably.

  The lid flange portion 13 is formed so as to be connected to the lid side wall portion 12. The lid flange portion 13 includes an overhang portion 131, a hanging portion 132, and an outer edge portion 133. The overhang part 131 is a part having a horizontal plane extending outward from the lower end of the lid side wall part 12. In the present embodiment, a lid pedestal portion 16 is formed on the overhang portion 131 (described later). The drooping portion 132 is a portion having a surface (slope) extending outward and downward from the periphery of the overhang portion 131. The outer edge portion 133 is a portion extending in the horizontal outward direction from the lower end of the hanging portion 132.

  An engagement protrusion (not shown) protruding inward is formed on a part of the inner surface of the drooping portion 132, and the engagement protrusion engages with the outer edge portion 232 of the container body 2, whereby the container The state where the lid 1 is attached to the main body 2 can be maintained. In this embodiment, the engagement is a so-called “outside fitting” type in which the lid body 1 is fitted to the outside of the container body 2. On the contrary, the lid is placed inside the container body 2. It may be a so-called “inner fitting” type in which the body 1 is fitted, or both “outer fitting” and “inner fitting” types may be mixed in one packaging container. .

  The outer edge portion 133 is provided so as to protrude in the horizontal direction from the lower end of the hanging portion 132. The periphery of the outer edge portion 133 is reinforced by forming a very large number of irregularities so that the finger is not cut even if the finger hits it. The irregularities have a wave shape when viewed from the side, and the direction of a large number of peaks and valleys is shortened in the width direction at each side, and the direction connecting the corners and the center at the corners (radiation) Direction). Further, for example, the irregularities are formed by knurled eyes such as flat knurled eyes and twill knurled eyes, and are preferably formed by twill knurled eyes so as not to slip.

  Among the peripheral edges of the top plate portion 11, each rectangular corner portion X (referring to a chamfered portion and its surrounding portion) in a plan view is provided to prevent misalignment along each side forming these corner portions X. A protrusion 14 is provided. In the present embodiment, as shown in FIGS. 1 and 3, misalignment prevention protrusions 14 are provided across the side of the chamfered portion and the sides on both sides of the chamfered portion. In this embodiment, the misalignment prevention protrusions 14 are located at the chamfered portion (that is, located at the tip side of the corner X) and both sides located along both sides sandwiching the chamfered portion. Part projection 142. A groove 143 is provided between the corner protrusion 141 and the side protrusions 142. The groove 143 reinforces both end portions in the longitudinal direction of the corner protrusion 141 and prevents the corner protrusion 141 from being deformed by an external force. Further, the groove portion 143 also reinforces the end portion near the chamfered portion of the both side protrusions 142. In the present invention, the formation of the groove 143 is not essential and may not be formed.

  As shown in FIGS. 3A and 3B, the both side projections 142 have a top portion 142a having the highest protrusion height (which indicates an upward protrusion height with respect to the flat surface portion 111 of the top plate portion 11). In the longitudinal direction, a steep slope 142b is formed on the side close to the corner protrusion 141 in the longitudinal direction, and is formed on the opposite side, and a gentle slope 142c is formed on the opposite side. doing. That is, the both side protrusions 142 have a substantially single slope. Each of the slope portions 142b and 142c has a curved slope that is convex upward as shown in the figure. As for the cross-sectional shape in the width direction of both side protrusions 142, FIG. 3A shows an outline for easy understanding of the shape, but actually, it is shown in FIG. 3C. It has a curved surface shape with no corners.

  The both side protrusions 142 are formed such that the protrusion height at the top 142 a is higher than that of the corner protrusion 141. And the protrusion height of both side part protrusion 142 is low at the front end side (the chamfered part side) of the rectangular corner X in a plan view, and suddenly increases at the steep slope 142b as the distance from the front end of the corner X increases. After passing the top portion 142a, the slope gradually decreases at the gentle slope portion 142c.

  By forming such misalignment prevention protrusions 14, it is possible to reinforce the corner portion X where the load (stress) is applied most in the lid body 1 when the packaging containers are stacked. And since the protrusion height of the corner | angular protrusion 141 is restrained low compared with the both-sides protrusion 142, the intensity | strength with respect to a compressive load can be enlarged rather than setting it as a high protrusion. Therefore, it is difficult for the corner protrusion 141 located in the chamfered portion of the corner X to be recessed due to an inadvertent external force.

  Both side protrusions 142 have gentle slope portions 142c. For this reason, when an operator such as a store clerk performs an operation of stacking the packaging containers at the store, the bottom of the packaging container to be stacked is slid on the gentle slope 142c of the packaging container located below, It can be moved to a predetermined stacking position. Therefore, it is difficult for the packaging container to be stacked to be caught on the protrusion 14 for preventing the shift in the packaging container positioned below, and the workability of the stacking work can be improved.

  Further, the gentle slope portion 142c of the both side projections 142 is formed so that the protruding height gradually decreases. Moreover, as shown in FIGS. 3B and 3C, the cross-sectional shape of the both side protrusions 142 is a curved surface in both the longitudinal direction and the width direction. For this reason, even if the both-side projection 142 is once deformed due to the large external force, the original shape is immediately restored.

  Further, the both side protrusions 142 are provided at two positions across the chamfered portion, and the both side protrusions 142 have a top part 142a having a high protruding height. For this reason, even if a plurality of packaging containers in a state in which the contents are accommodated are stacked, the top portions 142a at these two locations exhibit a displacement preventing action, so that the packaging containers are not displaced or inclined.

  Let's turn here. A boundary recess 15 that is recessed downward is provided at the boundary between the misalignment prevention protrusion 14 and the flat surface portion 111 of the top plate portion 11. By forming the boundary concave portion 15 in this way, the inner edge portion and the longitudinal end portion of the deviation preventing projection 14 are bordered by the boundary concave portion 15. For this reason, in particular, the deviation preventing projection 14 can be reinforced against bending stress applied in the extending direction of the boundary recess 15. Therefore, when the packaging containers are stacked, the corner portion X where the load (stress) is most applied in the lid body 1 is reinforced, and the strength of the lid body 1 can be further improved.

  In addition, a lid hill portion 16 is provided at a corner of the lid flange portion 13. The lid pedestal 16 is provided substantially parallel to the deviation preventing projection 14 at a position outward of the deviation preventing projection 14 in a plan view. It is formed so as to protrude upward from the overhanging portion 131. That is, the lid body hill portion 16 is provided so as to protrude upward from the lid flange portion 13 at each rectangular corner portion X in plan view so as to be along the side located at the corner portion X. Yes. Thus, by forming the lid body ridge portion 16 together with the misalignment prevention protrusions 14, when stacking packaging containers, the corner portion X that is the most loaded (stress) in the lid body 1 is reinforced, and the lid body The strength of 1 can be further improved. In the present invention, the formation of the lid base 16 is not essential, and for example, it may not be formed as shown in FIG.

  A recess 17 is provided between the lid side wall portion 12 and the lid hill portion 16. Similar to the boundary recess 15, the inner portion of the lid pedestal 16 is reinforced by this recess 17.

  And the lid opening assistance part 18 is provided in the upper surface of what is located in one diagonal by the rectangle in planar view among the lid body hill parts 16. FIG. The lid opening assisting portion 18 includes a finger pressing portion 181 and two supporting recesses 182 and 182. The finger pressing portion 181 is a portion that protrudes further upward than the lid body ridge portion 16, and the upper surface of the finger pressing portion 181 is for a person (such as a consumer) who wants to open the lid body 3 to place a finger (such as a thumb). Have been able to. And the support recessed part 182 is a recessed part formed in the downward direction from the upper surface of the lid opening assistance part 18. As shown in FIG. The interval between the two support recesses 182 and 182 is set to such an extent that a finger such as a consumer can be placed between the support recesses 182 and 182.

  The support recess 182 has a shape that is short in the longitudinal direction of the lid pedestal 16 and long in the width direction in plan view. And the cross-sectional shape in the direction orthogonal to the longitudinal direction of the support recessed part 182 is made into V shape or U shape. The support recess 182 is preferably configured such that the lower end of the support recess 182 abuts over a main body pedestal 24 (described later) in the main body flange 23 over substantially the entire width when the lid is closed.

  When opening the lid 1, a consumer or the like places a packaging container on a table or the like and lifts the drooping portion 132 at the corner X where the finger pressing portion 181 of the lid 1 is formed with an index finger or the like. The pressing part 181 is pressed downward with a thumb or the like. At this time, the support recess 182 is in contact with the upper surface of the main body platform 24 of the main body flange portion 23, and the container main body 2 is prevented from being lifted when the drooping portion 132 of the lid body 1 is lifted. And it becomes easy for the engagement protrusion in the inner surface of the hanging part 132 of the cover body 1 to get over the outer edge part 232 of the container main body 2, and to move upward. The locked state of is released. As a result, the lid body 1 can be removed from the container body 2. Since the lid body 1 can be easily removed while the container body 2 is placed on a table or the like, the leakage of the contents to the outside or the arrangement of the contents is unlikely to break.

  By providing the lid opening assisting portion 18 as described above, the lid body 1 can be removed from the closed state in which the lid body 1 is attached to the container body 2 with a slight force applied by a consumer or the like. In addition, the lid 1 can be opened stably even if the lid 1 or the container body 2 is deformed such as warping or twisting. For this reason, it can be set as the packaging container excellent in convenience.

  The lid opening assisting portion 18 may be provided on only one of the plurality of lid body pedestal portions 16 or may be provided on all of them. In addition, when the shape of the packaging container is a quadrangular shape (in the present embodiment, a rectangular shape) in plan view as in this embodiment, two lid opening assisting portions 18 are provided diagonally. As a result, one lid opening assisting part 18 always comes to a position where it can be seen by consumers and the like. For this reason, in order to open the cover 1, it is preferable that a consumer etc. do not have to change the position of the packaging container.

[Container body]
Next, the container body 2 will be described. As shown in FIG. 2, the container main body 2 includes a bottom surface portion 21, a main body side wall portion 22, and a main body flange portion 23.

  An article is placed on the bottom surface portion 21. The bottom surface portion 21 may be flat, or may be provided with a reinforcing rib or a partition or unevenness used when arranging the contents.

  The main body side wall portion 22 is formed so as to be connected to the bottom surface portion 21. The main body side wall portion 22 has a surface (slope) extending outward and upward from the periphery of the bottom surface portion 21. An opening is formed by the upper end of the main body side wall 22. Similar to the reinforcing rib 121 of the lid side wall part 12, the main body side wall part 22 may be provided with a reinforcing rib.

  The container main body 2 is formed so that the cross-sectional area in a plan view becomes wider from the bottom surface portion 21 side to the upper side (opening portion side) because the main body side wall portion 22 has an inclined surface. Thereby, when the container main bodies 2 are stacked, the upper container main body 2 can be put inside the lower container main body 2 and stacked.

  The main body flange portion 23 is formed so as to be connected to the main body side wall portion 22. The main body flange portion 23 includes an overhang portion 231 and an outer edge portion 232. The overhang portion 231 is a portion extending outward from the upper end of the main body side wall portion 22. The projecting portion 231 has a curved surface that is convex upward. Further, in the present embodiment, a main body pedestal portion 24 is formed on the overhang portion 231 (described later). The outer edge portion 232 is a portion extending in the horizontal outer direction from the peripheral edge of the overhang portion 231. The outer edge portion 232 can maintain a state in which the lid body 1 is attached to the container body 2 by engaging with an engagement protrusion (not shown) provided on the inner surface of the lid flange portion 13 in the lid body 1.

  The outer edge portion 232 is reinforced by forming a large number of fine irregularities on the periphery, and even when a finger hits the outer edge 232, the finger or the like is not cut. The irregularities have a wave shape when viewed from the side, and the direction of a large number of peaks and valleys is shortened in the width direction at each side, and the direction connecting the corners and the center at the corners (radiation) Direction). Further, for example, the irregularities are formed by knurled eyes such as flat knurled eyes and twill knurled eyes, and are preferably formed by twill knurled eyes so as not to slip.

  The main body hill portion 24 is provided at a corner of the main body flange portion 23. The main body platform 24 has a shape that substantially matches the shape of the lid body platform 16, more preferably slightly smaller than the lid body platform 16, and obstructs the attachment of the lid body 1 to the container body 2. The shape is such that it will not be. The main body pedestal 24 is formed so as to protrude upward from the overhanging portion 231 of the main body flange 23. The protruding height of the main body platform 24 is set such that the main body platform 24 does not interfere with the lid platform 16 in a state where the lid 1 is attached to the container body 2. Thus, by forming the main body height part 24 together with the lid body height part 16, it is possible to reinforce the corner part where the load (stress) is applied most when the packaging containers are stacked. The lid 1 is provided with a lid opening assisting portion 18, and the shape is different between one diagonal and the other diagonal, but the body hill portion 24 has the same shape at all four corners. Yes. When the lid body ridge portion 16 is not formed, the main body hill portion 24 may not be formed.

  As mentioned above, although one embodiment of the present invention has been described, the packaging container of the present invention is not limited to the above-described embodiment, and various modifications are made without departing from the gist of the present invention. Can do.

  For example, the lid 1 and the container main body 2 are configured separately in the present embodiment, but the present invention is not limited to this, and the lid 1 and the container main body 2 such as a so-called “food pack” are connected via a connecting portion (hinge portion). May be configured integrally.

DESCRIPTION OF SYMBOLS 1 Cover body 11 Top plate part 11 Flat surface part 12 Side wall part, Cover body side wall part 13 Flange part, Cover body flange part 14 Protrusion for slippage 15 Boundary recessed part 16 Elevation part, lid body hill part 2 Container body 23 Flange part, Main body Flange 24 Main body hill part X Polygonal corner of the lid

Claims (3)

In the lid of the packaging container having a polygonal shape in plan view, comprising a top plate portion, a side wall portion connected to the top plate portion, and a flange portion connected to the side wall portion,
In the peripheral portion of the top plate portion, the corner of the polygon is provided with a protrusion for preventing misalignment along each side forming the corner,
The protrusion for preventing misalignment is formed so that the protrusion height is low at the tip end side of the corner portion, becomes higher as it goes away from the tip along the side, and then gradually becomes lower. Container lid.   The packaging according to claim 1, wherein a boundary concave portion is provided at a boundary between the flat portion of the top plate portion and the projection for preventing misalignment so as to be recessed in a direction opposite to a protruding direction of the projection for preventing misalignment. Container lid. The lid body according to claim 1 or 2, and a container body to which the lid body is attached,
The lid body is provided with a hill portion that protrudes in the same direction as the protrusion for preventing misalignment along the sides forming the corner portion at the flange portion at the corner portion of the polygon,
The packaging container, wherein the container main body is provided with a flange portion having a shape substantially coinciding with the shape of the hill portion.

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