JP2020033057A - Packaging container - Google Patents

Abstract

To provide a packaging container having a container body and a lid body firmly fitted together, and configured such that the container body is difficult to be bent while a lid is opened or closed.SOLUTION: A target corner 1X is set as an open-lid region 11, the target corner 1X being at least one of four corners of a rectangular container body 3 and a lid body, a reverse-taper engaged part formed by engaging a body reverse-taper part 35 with a lid body reverse-taper part is provided roughly over the entire region of the open-lid region 11 and independently to the middle part of at least one of sides of the container body 3 and the lid body in a region other than the open-lid region 11 in a container outer periphery, a bottom 31 has a mounting part 31A on which an object to be stored is mounted, and a bottom groove 31C formed in the outer edge of the mounting part 31A and recessed below the mounting part 31A, a reinforcing connection part 38 for connecting the mounding part 31A and a body peripheral wall 32 to reinforce the container body 3 is provided above the bottom groove 31C in a region other than the bottom groove 31C in the outer edge of the mounting part 31A.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a packaging container having a container body and a lid.

  For example, in the following Patent Document 1 (Japanese Patent No. 6371023), a main body reverse taper portion [35] provided on the container main body [3] and a lid reverse taper portion [55] provided on the lid [5] are provided. ], The container [1] is disclosed, which enables the container body [3] and the lid [5] to be firmly fitted to each other. And, in the packaging container [1] of Patent Document 1, the lid knob which is held at the time of opening the lid corresponds to the position where the main body reverse taper portion [35] and the lid reverse taper portion [55] engage. Since the portion [56] is provided, the container body [3] and the lid [5] can be firmly fitted as described above, but the lid is easily opened.

  By the way, a packaging container configured so that the container body and the lid are firmly fitted when the lid is closed requires a certain amount of force when the lid is closed, and the lid has a knob portion and is opened. Even with an easy configuration, a certain amount of force is required since the fitting between the container body and the lid must be released when the lid is opened. Therefore, in such a packaging container, a load is applied when the lid is opened or closed, and the container body may be bent. Deflection of the container main body also causes the articles contained in the container to ramp up. For example, in a case where a partition wall [38] for partitioning a storage portion [37] for storing an object to be stored is provided in the container body [3] as in a packaging container [1] of Patent Document 1. The partition wall [38] plays a role of reinforcing the container body [3], and it is also possible to suppress the bending of the container body [3]. However, in this type of field, such a partition wall is not always provided in the packaging container, and furthermore, with respect to suppressing the bending of the container body regardless of the presence or absence of the partition wall. There is room for improvement.

Japanese Patent No. 6371023

  In view of the above situation, in a packaging container in which the container body and the lid are firmly fitted, it is desired that the container body be hardly bent when the lid is opened or closed.

Packaging container according to the present disclosure,
A packaging container comprising a container body and a lid, formed by sheet molding,
The container body and the lid are formed in a rectangular shape in plan view,
The container body includes a bottom portion, a main body peripheral wall portion extending upward from the bottom portion, a main body flange portion extending outward from the main body peripheral wall portion, and a main body reverse taper portion provided on a peripheral side of the main body flange portion. And a main body knob formed of a protruding piece protruding outward from the main body flange,
The lid is provided on a top surface portion, a lid peripheral wall portion extending downward from the top surface portion, a lid flange portion extending outward from the lid peripheral wall portion, and provided on a peripheral side with respect to the lid flange portion. A lid body reverse taper portion that engages with the main body reverse taper portion, and a lid body grip portion that is composed of a projecting piece that protrudes outward from the lid body flange portion and is overlapped with the main body grip portion,
An opening area where the main body knob and the lid knob are overlapped is provided on the outer periphery of the container,
Of the four corners of the rectangular container body and the lid, at least one corner is a target corner, and the target corner is the open area,
A reverse taper engagement portion formed by engaging the main body reverse taper portion and the lid reverse taper portion is provided over substantially the entire region in the cover opening region, and other than the cover opening region on the outer periphery of the container. In the area of the rectangular container body and the lid body independently provided at an intermediate portion of at least one of the sides,
The bottom portion has a mounting portion on which an object is placed, and a bottom groove formed on an outer edge of the mounting portion and recessed below the mounting portion,
A reinforcing connecting portion that connects the placing portion and the peripheral wall portion of the main body to reinforce the container body is provided in a region other than the bottom groove at the outer edge of the placing portion.

  According to this configuration, the container main body and the lid can be firmly fitted by the engagement between the main body reverse taper and the lid reverse taper. The rigidity of the container body can be increased by the reinforcing connecting portion connecting the mounting portion and the main body peripheral wall portion, and when the container body and the lid are closed or the fitting is released. Even when a load is applied when the lid is opened, the container body can be made hard to bend.

In one embodiment,
It is preferable that the reverse taper engaging portion and the reinforcing connection portion are provided corresponding to at least one intermediate portion of each side of the rectangular container body and the lid.

  The load applied at the time of closing or opening the lid increases near the reverse taper engagement portion where the main body reverse taper portion and the lid reverse taper portion engage. According to this configuration, since the reinforcing connection portion is provided so as to correspond to the reverse taper engagement portion of at least one side middle portion, it is possible to increase the rigidity near the reverse taper engagement portion particularly in the easily bent middle portion. Can be. Therefore, even when a large load is applied in the vicinity of the reverse taper engagement portion, it is possible to prevent the container body from bending in the vicinity.

In one embodiment,
It is preferable that the reinforcing connection portion is provided on at least two opposing sides of each side of the rectangular container body.

  In the rectangular container body, each side is easier to bend than the four corners. According to this configuration, the rigidity of a relatively flexible portion of the container body can be increased. In addition, since the reinforcing connection portion is provided at least on each of the two opposing sides, the rigidity of the entire container can be secured in a well-balanced manner.

In one embodiment,
Of the four corners of the rectangular container body and the lid, two corners arranged diagonally are the target corners and the lid opening area, and the remaining two corners are the body knobs. And the lid knob is a non-opening area where the lid knob is not overlapped,
It is preferable that the reverse taper engagement portions are provided in all the open regions and all the non-open regions.

  According to this configuration, since the inverted tapered engagement portions can be arranged at all four corners of the rectangular container body and the lid, the container body and the lid can be fitted in a well-balanced manner as a whole container. The lid opening area where the body knob and the lid knob are overlapped is arranged at two diagonal corners of the four corners of the rectangular container main body and the lid, and the other two corners are non-corner. Since the opening area is not required for the main body knob and the lid knob, the configuration can be simplified.

  Further features and advantages of the technology according to the present disclosure will become more apparent from the following description of exemplary and non-limiting embodiments described with reference to the drawings.

Exploded front view of packaging container Exploded side view of a packaging container Top view of packaging container Top view of container body VV sectional view in FIG. VI-VI sectional view in FIG. VII-VII sectional view in FIG. VIII-VIII sectional view in FIG.

(Schematic configuration of packaging container)
The packaging container 1 according to the present embodiment will be described with reference to the drawings. The packaging container 1 is formed by sheet molding, and includes a container body 3 and a lid 5 as shown in FIGS. 1 and 2. 5 to 8 show a plan view of the packaging container 1 and are cut along the VV cross section line, the VI-VI cross section line, the VII-VII cross section line, and the VIII-VIII cross section line in FIG. It is sectional drawing. And, in order to make the cut portion of the container main body 3 easily understandable, the above-mentioned sectional line is also shown in FIG. 4 showing a plan view of the container main body 3.

  The packaging container 1 stores therein an object such as food (for example, cooking) therein. The packaging container 1 according to the present embodiment is suitable for accommodating, for example, small lump objects such as nigiri sushi and rice balls. In the following, the direction from the inner side of the packaging container 1, that is, the direction from the outer edge side to the center side is defined as “inward” or “inward”. The direction from the outer side of the packaging container 1, that is, the direction from the center to the outer edge is described as “outward” or “outside”.

  As shown in FIG. 3, in the present embodiment, the packaging container 1 is formed in a rectangular shape in plan view. That is, the container main body 3 and the lid 5 constituting the packaging container 1 are formed in a rectangular shape in plan view. In the present embodiment, the container body 3 and the lid 5 are formed in a rectangular shape in plan view, and have a pair of short sides 3SS and 5SS and a pair of long sides 3SL and 5SL, respectively. However, without being limited to such a configuration, the container body 3 and the lid 5 may be formed in a square shape in plan view.

  As will be described later in detail, the container main body 3 is provided with a main body reverse taper portion 35, and the lid 5 is provided with a lid reverse taper portion 55 that engages with the main body reverse taper portion 35. Then, as shown in FIG. 3, the packaging container 1 is provided with a reverse taper engagement portion 15 in which the main body reverse taper portion 35 and the lid reverse taper portion 55 are engaged. As a result, the container body 3 and the lid 5 can be firmly fitted. The container main body 3 is provided with a main body knob 36, and the lid 5 is provided with a lid knob 56 on which the main body knob 36 is overlapped. Then, as shown in FIG. 3, the packaging container 1 is provided with a lid opening area 11 in which the main body knob 36 and the lid knob 56 overlap each other. This makes it easier to pinch the lid knob 56 in the lid opening area 11, and to open the lid while pinching the lid knob 56 during opening.

  Then, as shown in FIGS. 1 to 3, at least one of the four corners of the rectangular container body 3 and the lid 5 is set as the target corner 1 </ b> X, and the target corner 1 </ b> X is set as the lid open area 11. In the present embodiment, of the four corners of the rectangular container body 3 and the lid 5, two diagonally arranged corners are set as the target corners 1 </ b> X and the cover open area 11, and are set as the target corners 1 </ b> X. The other two corners that are not formed are the non-opening regions 12 where the main body knob 36 and the lid knob 56 are not overlapped. In the illustrated example, neither the main body knob 36 nor the lid knob 56 is disposed in the non-opening area 12. However, without being limited to such a configuration, any one of the main body knob 36 and the lid knob 56 may be arranged in the non-covered area 12. Hereinafter, the configuration of each part of the packaging container 1 will be described in detail.

(Container body)
As shown in FIG. 4, the container main body 3 has four main body side portions 3S. In the present embodiment, the main body side 3S includes a pair of main body short sides 3SS forming a short side of the container main body 3 having a rectangular shape in a plan view, and a pair of main body long sides 3SL forming a long side. Contains.

  As shown in FIGS. 4 to 8, the container body 3 includes a bottom surface portion 31, a main body peripheral wall portion 32 extending upward from the bottom surface portion 31, a main body flange portion 33 extending outward from the main body peripheral wall portion 32, and a main body flange portion. It has a main body reverse taper portion 35 provided on the peripheral side (outside) of the main body 33 and a main body knob 36 made of a projecting piece protruding outside the main body flange portion 33.

  As shown in FIG. 4, the container main body 3 has a storage section 37 that is surrounded by the main body peripheral wall section 32 and stores an object to be stored. The bottom portion 31 is provided with a mounting portion 31A on which an object stored in the housing portion 37 is mounted, and a bottom groove portion provided at an outer edge of the mounting portion 31A and recessed below the mounting portion 31A. 31C. In the example illustrated in FIG. 4, the bottom surface portion 31 further includes a linear concave portion 31B that is recessed downward and linearly formed in the mounting portion 31A.

  The mounting portion 31A is provided at the center of the container main body 3, and is disposed above the bottom groove portion 31C. A plurality of (five in this example) linear recesses 31B are provided on the mounting portion 31A. In addition, the linear concave portion 31B is inclined in a plan view with respect to both the direction along the main body long side 3SL and the direction along the main body short side 3SS. The plurality of linear concave portions 31B are configured to have different lengths depending on the positions where they are provided. In the illustrated example, of the five linear concave portions 31B, the linear concave portion 31B disposed at the center is the longest, and the linear concave portion 31B disposed closer to the end is shorter.

  As shown in FIG. 4, the bottom groove 31C is provided intermittently at the outer edge of the mounting portion 31A. In the illustrated example, the bottom groove 31C is provided corresponding to both ends 3E of the main body long side 3SL, and is provided corresponding to the intermediate portion 3M of the main body short side 3SS. In other words, the bottom groove 31C is not provided at the intermediate portion 3M of the main body long side 3SL and at both ends 3E of the main body short side 3SS. As shown in FIG. 8, in the present embodiment, the bottom groove 31C constitutes the leg 30 of the container body 3 on the back surface side.

  The main body peripheral wall portion 32 extends upward from the bottom surface portion 31 as described above. As shown in FIGS. 1, 2, 4, etc., in the present embodiment, the height of the main body peripheral wall portion 32 at the four corners of the container main body 3 is the intermediate portion 3M of each main body side portion 3S of the container main body 3. It is configured to be higher than the height at. In other words, the main body peripheral wall portion 32 is formed so as to rise upward at four corners of the container main body 3. In the present embodiment, the main body peripheral wall portion 32 is connected to the bottom groove portion 31C of the bottom surface portion 31 at a plurality of positions in the circumferential direction, and extends upward from the bottom groove portion 31C (see FIG. 8). In the illustrated example, the main body peripheral wall portion 32 is formed so as to be inclined outward as it goes upward.

  Here, in general, for example, when a partition wall for partitioning a storage section for storing an object to be stored is provided in the container body, such as a container for hors d'oeuvres or a lunch box for storing a large number of dishes, Such a partition wall has a function of increasing the rigidity of the container main body, and can suppress bending of the container main body when a load is applied to the container main body when the lid is opened or closed, for example. However, as described above, the packaging container 1 according to the present embodiment is suitable for accommodating small lump-shaped objects such as nigiri sushi and rice balls, for example, a container for hors d'oeuvres and a lunch container. It does not have a partition wall for partitioning the housing portion 37 as described above.

  Therefore, as shown in FIGS. 4 to 7, the reinforcing connecting portion 38 that connects the mounting portion 31 </ b> A and the main body peripheral wall portion 32 to reinforce the container main body 3 is provided on the outer edge of the mounting portion 31 </ b> A other than the bottom groove 31 </ b> C. Provided in the area. According to this, even when the above configuration does not have the partition wall, the container main body 3 can be made hard to bend when a load is applied to the container main body 3 when the lid is opened or closed. The reinforcing connection portion 38 is disposed above the bottom groove 31C.

  As shown in FIGS. 3 and 4, at least one intermediate portion 1 </ b> M of each side of the rectangular container body 3 and the lid 5 corresponds to the reverse tapered engagement portion 15 and the reinforcing connection portion 38. Is provided. As shown in FIG. 4, the reinforcing connection portion 38 is provided on at least two opposing sides of each side of the rectangular container body 3, and is provided at the intermediate portion 1M between the opposing two sides. , The reverse taper engaging portion 15 and the reinforcing connecting portion 38 are provided correspondingly. Further, the reinforcing connecting portions 38 are provided at each of the four corners of the rectangular container body 3. In the illustrated example, the reinforcing connection portion 38 is disposed so as to be sandwiched between the pair of bottom grooves 31C in a plan view. Specifically, at the outer edge of the mounting portion 31A, a plurality of reinforcing connecting portions 38 and a plurality of bottom groove portions 31C are arranged, and the reinforcing connecting portions 38 and the bottom groove portions 31C alternately appear in the circumferential direction. Are located.

  As shown in FIG. 4, in the present embodiment, the reinforcing connecting portion 38 includes a central reinforcing connecting portion 38 </ b> A provided at each intermediate portion 3 </ b> M of the pair of main body long side portions 3 </ b> SL and four corners of the container main body 3. And a corner-side reinforcing connecting portion 38B provided at the corner.

  The center side reinforcing connecting portion 38A is formed so as to have a bulging curved surface which is convex upward as a whole. The bulging curved surface is formed in a mountain shape in which the bulging height at the center is the largest and the bulging height gradually decreases toward both ends. Further, the center side reinforcing connecting portion 38A has a reinforcing convex portion 38Aa which is convex inward. Thereby, the rigidity of the center side reinforcing connecting portion 38A can be increased. In the illustrated example, one reinforcing protrusion 38Aa is provided for one center-side reinforcing connecting portion 38A. However, without being limited to such a configuration, a plurality of reinforcing protrusions 38Aa may be provided for one center-side reinforcing connecting portion 38.

  As described above, the corner-side reinforcing connection portions 38B are provided at each of the four corners of the container body 3, in other words, correspond to the pair of corners corresponding to the open area 11 and the non-open area 12. It is provided at each of the pair of corners. In the present embodiment, the corner-side reinforcing connecting portions 38B provided at the pair of corners corresponding to the cover opening region 11 are formed so as to have a bulging curved surface that is convex upward as a whole ( (See FIG. 5). On the other hand, the corner-side reinforcing connecting portions 38B provided at the pair of corners corresponding to the non-covered region 12 are formed so as to have a concave curved surface that is concavely concave downward as a whole (FIG. 6). reference). Further, the corner-side reinforcing connecting portions 38B (all the corner-side reinforcing connecting portions 38B provided at the four corners) have reinforcing concave portions 38Ba that are recessed outward. Thereby, the rigidity of the corner side reinforcing connection part 38B can be increased. In the illustrated example, one reinforcing recess 38Ba is provided for one corner-side reinforcing connecting portion 38B. However, without being limited to such a configuration, a plurality of reinforcing concave portions 38Ba may be provided for one corner-side reinforcing connecting portion 38B.

  As shown in FIG. 4, in the present embodiment, the main body peripheral wall portion 32 has a peripheral wall bulging portion 32A bulging inwardly of the container (see also FIG. 7). Thereby, the rigidity of the main body peripheral wall portion 32 can be increased. In the present embodiment, the peripheral wall bulging portion 32A is formed in a mountain shape in which the central portion of the peripheral wall bulging portion 32A bulges most, and the bulging amount gradually decreases (inclines) from the central portion toward the end. Have been. The peripheral wall bulging portion 32 </ b> A is provided on the main body peripheral wall portion 32 so as to be adjacent to the inside of the main body flange portion 33. One or more peripheral wall bulging portions 32A are provided on the main body peripheral wall portion 32 in the main body long side portion 3SL. In the illustrated example, three peripheral wall bulging portions 32A are provided. More specifically, the peripheral wall bulging portion 32A is provided at the intermediate portion 3M and both ends 3E of the main body long side portion 3SL. In the present example, the peripheral wall bulging portion 32A is not provided on the main body peripheral wall portion 32 in the main body short side portion 3SS. May be provided.

  As shown in FIGS. 4 to 8, the main body flange portion 33 extends outward from the upper end of the main body peripheral wall portion 32. In the present embodiment, the container body 3 has a body skirt portion 34 extending downward from the outer end of the body flange portion 33. The main body skirt portion 34 is formed over the entire circumference of the container main body 3. The main body skirt portion 34 is formed with a main body bulging portion 34A bulging outward over the entire circumference of the container main body 3. In the present embodiment, the main body reverse taper portion 35 is formed continuously below the main body bulge portion 34A below the main body bulge portion 34A and is formed over the entire circumference of the container main body 3. . The main body reverse taper portion 35 is formed so as to be inclined inward as going downward.

  As shown in FIGS. 4 and 5, the main body knob portion 36 is formed continuously with the main body flange portion 33 via the main body skirt portion 34 and protrudes outside the main body flange portion 33. In the present embodiment, the main body knobs 36 are arranged at two corners, which are the target corners 1X, of the four corners of the container body 3, and are not arranged at the other two corners that are not the target corners 1X. In the example shown in FIG. 4, the main body knob 36 is formed in a substantially triangular shape in plan view. As shown in FIG. 5, in this embodiment, the main body knob 36 extends outward from the lower end of the main body skirt 34 along the horizontal direction. In the present embodiment, the main body knob 36 is provided with a main body knob 36A formed in a planar shape and an upper protrusion 36B protruding upward from the main body knob 36A.

(Lid)
As shown in FIGS. 1 to 3, the lid 5 has four lid side portions 5S. In the present embodiment, the lid side portion 5S includes a pair of lid short side portions 5SS forming a short side portion of the rectangular lid 5 in a plan view and a pair of lid long side portions 5SL forming a long side portion. And

  The lid 5 includes a top surface portion 51, a lid peripheral wall portion 52 extending downward from the top surface portion 51, a lid flange portion 53 extending outward from the lid peripheral wall portion 52, and a peripheral edge side of the lid flange portion 53. A lid reverse taper portion 55 that is provided and engages with the main body reverse taper portion 35; a lid grip portion 56 that is made of a projecting piece that protrudes outside the lid flange portion 53 and overlaps the main body grip portion 36; have.

  The top surface portion 51 is formed in a rectangular shape (rectangular shape) in plan view. In the example shown in FIG. 3, the top surface portion 51 has a shape in which four corners are chamfered.

  The lid peripheral wall portion 52 is formed continuously to the outer edge of the top surface portion 51. The lid peripheral wall portion 52 is formed so as to be inclined outward as it goes downward.

  As shown in FIGS. 3 and 5 to 8, the lid flange 53 extends outward from the lower end of the lid peripheral wall 52 along the horizontal direction. In the present embodiment, the lid flange 53 is configured such that the height at the four corners of the lid 5 is higher than the height at the intermediate portion 5M of each lid side 5S of the lid 5. . In other words, the lid flange 53 is formed so as to rise upward at the four corners of the lid 5. The lid 5 has a lid skirt 54 extending downward from the outer end of the lid flange 53. The lid skirt 54 is formed over the entire circumference of the lid 5. The lid skirt portion 54 is formed with a lid bulging portion 54A that bulges outward over the entire circumference of the lid 5. In the present embodiment, the lid reverse taper portion 55 is formed below the lid bulge 54A so as to be continuous with the lid bulge 54A. The lid inversely tapered portion 55 is formed so as to be inclined inward as going downward.

  As shown in FIG. 3, in this embodiment, the lid reverse taper portion 55 is formed intermittently on the outer periphery of the lid 5. The lid reverse taper portion 55 is provided over substantially the entire area of the lid opening area 11 (the target corner 1X), and a plurality of lid sides are provided in areas other than the lid opening area 11 on the outer periphery of the container. Of the parts 5S, they are independently provided in the middle part 5M of at least one lid side part 5S.

  In the present embodiment, the lid reverse taper portion 55 is provided in the intermediate portion 5M in the lid long side 5SL and the intermediate portion 5M in the lid short side 5SS. Further, the lid long side portion 5SL and the lid short side portion 5SS are also provided with lid reverse taper portions 55 at both ends 5E. Therefore, in this example, the lid inversely tapered portion 55 is independently provided on both ends 5E and the intermediate portion 5M of the pair of lid long sides 5SL and the pair of lid short sides 5SS of the rectangular lid 5. Is provided.

  As shown in FIGS. 3 and 5, the lid knob 56 is formed continuously with the lid flange 53 via the lid skirt 54, and projects outward from the lid flange 53. In the present embodiment, the lid knob 56 is disposed at two corners, which are the target corners 1X, of the four corners of the lid 5, and is not disposed at the other two corners that are not the target corners 1X. In the example shown in FIG. 3, the lid knob 56 is formed in a substantially triangular shape in plan view. As shown in FIG. 5, in the present embodiment, the lid knob 56 extends outward from the lower end of the lid skirt 54 along the horizontal direction. In the present embodiment, the lid knob 56 is provided with a lid knob surface 56A formed in a planar shape and a lower protrusion 56B protruding downward from the lid knob surface 56A. In the illustrated example, the lower protruding portion 56B has an uneven portion on a part thereof.

  As shown in FIG. 3, a lid opening area 11 (see also FIG. 5) serving as a starting point when the lid 5 is removed from the container body 3 is provided on the outer periphery of the container. As described above, of the four corners of the rectangular container body 3 and the lid 5, two corners arranged diagonally are the target corner 1 </ b> X and the open area 11. The other two corners that are not the target corner 1X are the non-covered areas 12 where the main body knob 36 and the lid knob 56 are not overlapped. In the lid opening region 11, the lid knob 56 and the main body knob 36 are overlapped with the lid knob 56 disposed above the main body knob 36. In a state where the main body knob 36 and the lid knob 56 are overlapped with each other, as shown in FIG. 5, the upper protrusion 36B of the main body knob 36 and the lower protrusion 56B of the lid knob 56 come into contact with each other. As a result, a gap is formed between the main body gripping surface portion 36A and the lid body gripping surface portion 56A. This makes it easy to pinch the lid knob 56 when the lid is opened.

[Reverse taper engagement part]
As shown in FIG. 3, the reverse taper engaging portion 15 in which the main body reverse taper portion 35 (refer to FIG. 4 and the like) and the lid reverse taper portion 55 are engaged with each other over substantially the entire region in the cover opening region 11. In a region other than the lid opening region 11 on the outer periphery of the container, the container is independently provided at at least one intermediate portion 1M of each side of the rectangular container body 3 and the lid 5. As described above, in the present embodiment, two corners of the four corners of the rectangular container body 3 and the lid 5 that are not the target corners 1X are not overlapped with the body knob 36 and the lid knob 56. The area is a non-covered area 12. The reverse taper engagement portions 15 are provided in all the open areas 11 and all the non-open areas 12. Thus, the reverse taper engagement portions 15 are provided at the four corners of the container body 3 and the lid 5. Thus, the entire container body 3 and the entire lid 5 can be fitted in a well-balanced manner.

  The reverse taper engagement portion 15 is provided over substantially the entire region in all the open regions 11 and all the non-open regions 12. As shown in FIGS. 5 and 7, in the reverse taper engagement portion 15, the lid reverse taper portion 55 is engaged with the main body reverse taper portion 35 from outside. And, as described above, the lid reverse taper portion 55 and the main body reverse taper portion 35 are formed so as to be inclined inward as going downward. For this reason, the reverse taper engagement portion 15 formed by the engagement is also inclined inward toward the lower side. In the example shown in FIGS. 5 and 7, the reverse taper engagement portion 15 is inclined so that the angle between the reverse taper engagement portion 15 and the vertical line is θ. “Θ” is preferably, for example, 30 ° to 90 °. With the above configuration, the lid 5 is configured to be hard to come off from the container body 3 in a state where no external force is applied.

  As described above, the reverse taper engagement portion 15 is independently provided in at least one intermediate portion 1M of the sides of the rectangular container body 3 and the lid 5. In this embodiment, the reverse taper engagement portion 15 is provided at the intermediate portion 1M of each of the long sides 3SL, 5SL and the short sides 3SS, 5SS of the container body 3 and the lid 5 (the packaging container 1). I have. Further, in the long sides 3SL, 5SL and the short sides 3SS, 5SS of the container body 3 and the lid 5 (packaging container 1), the reverse taper engagement portions 15 are provided at both ends 1E. Have been. Therefore, in this example, the reverse taper engaging portion 15 is formed by the pair of long sides 3SL, 5SL and the pair of short sides 3SS, 5SS of the rectangular container body 3 and the lid 5 at both ends 1E and the intermediate portion 1M. And are provided independently.

  According to the packaging container 1 described above, a configuration in which the container main body 3 and the lid 5 can be firmly fitted by the engagement of the main body reverse taper portion 35 and the lid reverse taper portion 55 can be realized. Further, with such a configuration, a certain amount of force is required at the time of opening and closing the lid, and a load is applied to the container body 3. However, in the packaging container 1, the rigidity of the container body 3 can be increased by the reinforcing connection portion 38 that connects the mounting portion 31 </ b> A and the main body peripheral wall portion 32, and thus the container body 3 is opened or closed when the cover is opened or closed. , The container body 3 can be made hard to bend.

[Other embodiments]
(1) In the above embodiment, of the four corners of the rectangular container body 3 and the lid 5, two corners arranged diagonally are set as the target corner 1 </ b> X and the open area 11. An example has been described in which the other two corners, which are not the corners 1X, are the non-opening regions 12 in which the main body knob 36 and the lid knob 56 are not overlapped. However, the present invention is not limited to such an example. All four corners of the rectangular container body 3 and the lid 5 may be the target corners 1X and the lid open area 11. Alternatively, only one corner of the rectangular container body 3 and the lid 5 may be the target corner 1 </ b> X and the lid open area 11.

(2) In the above embodiment, the inverse tapered engagement portion 15 and the reinforcing connection portion 38 are provided corresponding to at least one intermediate portion 1M of the sides of the rectangular container body 3 and the lid 5. Examples have been described. However, the present invention is not limited to such an example. The reverse taper engaging portion 15 and the reinforcing connecting portion 38 may be displaced from each other without any correspondence on at least one of the sides of the container body 3 and the lid 5.

(3) In the above-described embodiment, an example in which the main body reverse taper portion 35 is formed over the entire circumference of the container main body 3 has been described. However, the present invention is not limited to such an example. The main body reverse taper portion 35 may be formed intermittently on the outer periphery of the container main body 3 so as to correspond to the lid reverse taper portion 55. Further, the example in which the lid inversely tapered portion 55 is formed intermittently on the outer periphery of the lid 5 has been described, but may be formed over the entire periphery of the lid 5. The reverse taper engaging portion 15 in which the main body reverse taper portion 35 and the lid reverse taper portion 55 are engaged is provided over substantially the entire region in the cover opening region 11, and the cover opening region on the outer periphery of the container. In the region other than 11, the main body reverse taper portion 35 and the lid reverse taper portion 55 are provided so as to be independently provided on the intermediate portion 1 </ b> M of at least one of the sides of the rectangular container main body 3 and the lid 5. What is necessary is just to determine the formation mode.

(4) In the above embodiment, the reverse taper engagement portion 15 is provided at the intermediate portion 1M between the long sides 3SL and 5SL and the short sides 3SS and 5SS of the container body 3 and the lid 5 (packaging container 1). Has been described. However, the present invention is not limited to such an example. The reverse taper engagement portion 15 is provided between the long side portions 3SL and 5SL of the intermediate portions 1M of the long side portions 3SL and 5SL and the short side portions 3SS and 5SS of the container body 3 and the lid 5 (packaging container 1). It may be provided only in the middle part 1M of 5SL, in other words, it may not be provided in the middle part 1M of each short side 3SS, 5SS.

(5) In the above-described embodiment, the center side reinforcing connecting portion 38A and the corner side reinforcing connecting portion 38B provided in the cover opening region 11 are formed so as to have a bulging curved surface, and are provided in the non-cover opening region 12. The example in which the provided corner-side reinforcing connecting portion 38B is formed so as to have a concave curved surface has been described. However, the present invention is not limited to such an example. The center-side reinforcing connecting portion 38A and the corner-side reinforcing connecting portion 38B may be formed so as to have any of a bulging curved surface and a concave curved surface, or both of the bulging curved surface and the concave curved surface. It may be formed so as not to have a flat surface.

(6) In the above-described embodiment, the reinforcing reinforcing portion 38Aa that is inwardly convex is provided in the central reinforcing connecting portion 38A, and the reinforcing concave portion 38Ba that is recessed outward is provided in the corner reinforcing connecting portion 38B. Examples have been described. However, the present invention is not limited to such an example. A reinforcing concave portion may be provided in the center side reinforcing connecting portion 38A and a reinforcing convex portion may be provided in the corner side reinforcing connecting portion 38B, or a configuration in which such a reinforcing convex portion and a reinforcing concave portion are not provided. Can also.

(7) In the above-described embodiment, an example has been described in which the reinforcing connecting portion 38 is configured to include the center-side reinforcing connecting portion 38A and the corner-side reinforcing connecting portion 38B. However, the present invention is not limited to such an example. The reinforcing connecting portion 38 may be configured to include only the central reinforcing connecting portion 38A, or may be configured to include only the corner reinforcing connecting portion 38B.

(8) It should be noted that the configuration disclosed in each of the above embodiments can be applied in combination with the configuration disclosed in other embodiments as long as no contradiction occurs. Regarding other configurations, the embodiments disclosed in this specification are merely examples in all respects. Therefore, various modifications can be appropriately made without departing from the spirit of the present disclosure.

  The technology according to the present disclosure can be used for a packaging container including a container body and a lid.

1: packaging container 1M: intermediate portion 1X of each side of packaging container 1X: target corner 3: container body 3S: main body side portion 3M: intermediate portion 5 of main body side portion: lid 5S: lid side portion 5M: Intermediate portion 11 of the side of the lid: open region 12: non-open region 15: reverse taper engaging portion 31: bottom portion 31 A: mounting portion 31 C: bottom groove portion 32: main body peripheral wall portion 33: main body flange portion 35: Main body reverse taper portion 36: Main body knob portion 38: Reinforced connection portion 51: Top surface portion 52: Lid peripheral wall portion 53: Lid flange portion 55: Lid reverse taper portion 56: Lid knob portion

Claims (4)

A packaging container comprising a container body and a lid, formed by sheet molding,
The container body and the lid are formed in a rectangular shape in plan view,
The container body includes a bottom portion, a main body peripheral wall portion extending upward from the bottom portion, a main body flange portion extending outward from the main body peripheral wall portion, and a main body reverse taper portion provided on a peripheral side of the main body flange portion. And a main body knob formed of a protruding piece protruding outward from the main body flange,
The lid is provided on a top surface portion, a lid peripheral wall portion extending downward from the top surface portion, a lid flange portion extending outward from the lid peripheral wall portion, and provided on a peripheral side with respect to the lid flange portion. A lid body reverse taper portion that engages with the main body reverse taper portion, and a lid body grip portion that is composed of a projecting piece that protrudes outward from the lid body flange portion and is overlapped with the main body grip portion,
An opening area where the main body knob and the lid knob are overlapped is provided on the outer periphery of the container,
Of the four corners of the rectangular container body and the lid, at least one corner is a target corner, and the target corner is the open area,
A reverse taper engagement portion formed by engaging the main body reverse taper portion and the lid reverse taper portion is provided over substantially the entire region in the cover opening region, and other than the cover opening region on the outer periphery of the container. In the area of the rectangular container body and the lid body independently provided at an intermediate portion of at least one of the sides,
The bottom portion has a mounting portion on which an object is placed, and a bottom groove formed on an outer edge of the mounting portion and recessed below the mounting portion,
The packaging container, wherein a reinforcing connecting portion that connects the mounting portion and the peripheral wall portion of the main body to reinforce the container body is provided in a region other than the bottom groove at an outer edge of the mounting portion.   The packaging according to claim 1, wherein the inverse tapered engagement portion and the reinforcing connection portion are provided correspondingly to an intermediate portion of at least one of the sides of the rectangular container body and the lid. Container.   3. The packaging container according to claim 1, wherein the reinforcing connection portion is provided on at least two opposing sides of each side of the rectangular container body. 4. Of the four corners of the rectangular container body and the lid, two corners arranged diagonally are the target corners and the lid opening area, and the remaining two corners are the body knobs. And the lid knob is a non-opening area where the lid knob is not overlapped,
The packaging container according to any one of claims 1 to 3, wherein the reverse taper engagement portion is provided in all of the open regions and all of the non-open regions.

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