JP7558313B2 - Packaging containers - Google Patents

Description

The present invention relates to a packaging container suitable for storing food.

Plastic products used in areas such as food packaging have excellent characteristics, such as being durable, light, inexpensive, easy to process, and allowing for mass production, making them indispensable in our daily lives. To give these products the necessary strength, it is sufficient to use thick thermoplastic plastic sheets. However, in recent years, there has been a demand to reduce the use of petroleum-derived plastics as much as possible and to take environmentally friendly measures, and reducing the amount of plastic used has become one of the themes.

The following Patent Document 1 describes providing a bent portion at the bottom of the corner of the side surface, and providing a V-groove-shaped vertical rib that extends from near the opening of the corner to the bent portion. It is said that providing both a bent portion and a vertical rib at the corner in this way makes it possible to prevent the container from deforming when a force is applied to the container from above.

However, the V-groove-shaped vertical ribs reduce visibility at the corners. If the vertical ribs were removed, there would be a risk that the container would deform when force is applied from above, so a thicker sheet would have to be used to ensure strength.

Patent No. 6480207

Therefore, the objective of the present invention is to provide a packaging container that has excellent visibility of the contents at the corners and can ensure strength even when made thin.

The packaging container according to the present invention is a transparent packaging container that includes a container body that is rectangular in plan view and a lid that covers the opening of the container body, the container body having a bottom surface, a body side surface rising from the bottom surface, and a body flange portion provided on the outside of the body side surface, and the corners of the body side surface are provided with corner chamfers that are inclined outwardly toward the upper side, the corner chamfers having a main chamfer that constitutes the main part of the corner chamfer, an upper chamfer that is provided above the main chamfer and has a larger angle of inclination with respect to the horizontal plane than the main chamfer, and a lower chamfer that is provided below the main chamfer and has a larger angle of inclination with respect to the horizontal plane than the main chamfer.

According to this configuration, the upper and lower chamfered portions are provided above and below the main chamfered portion, which is the main portion of the corner chamfered portion, and are steeper inclined than the main chamfered portion. Therefore, when a force acts on the container body from above, the upper and lower chamfered portions of the corner chamfered portion can strongly brace against the force from above. Therefore, the strength of the corner chamfered portion can be easily ensured without providing a vertical rib on the main chamfered portion of the corner chamfered portion. Furthermore, since there is no need to provide a vertical rib on the main chamfered portion, a decrease in visibility of the main chamfered portion can be suppressed. On the other hand, since the main chamfered portion is gentler inclined than the upper and lower chamfered portions, the container body can be easily grasped from below. For example, when holding the container body from below to place food such as cut fruit in the container body, it is easy to place a thumb or the like on the main chamfered portion, and the container body can be stably grasped.

In particular, it is preferable that the angle of inclination of the upper chamfered portion with respect to the horizontal plane is greater than the angle of inclination of the lower chamfered portion with respect to the horizontal plane. With this configuration, the upper chamfered portion, which has a steeper inclination than the lower chamfered portion, can first firmly withstand forces from above. This makes it possible to further improve the strength against forces from above.

Furthermore, it is preferable that the width of the main chamfered portion increases toward the bottom. With this configuration, the container body can be grasped from below by placing a thumb or the like against the main chamfered portion more easily. Also, since the lower chamfered portion is wider than the upper chamfered portion, it becomes easier to place a thumb or the like from the lower chamfered portion to the main chamfered portion, making it easier to grasp the container body.

As described above, because steeply inclined upper and lower chamfers are provided above and below the main chamfer, sufficient strength can be ensured without providing vertical ribs to the main chamfer, and the thickness of the container body can be reduced. In addition, because there is no need to provide vertical ribs to the main chamfer, good visibility can be ensured at the corner chamfer. Moreover, because the main chamfer has a relatively gentle incline, the container body can be firmly and stably grasped from below.

FIG. 2 is a perspective view of a container body of a packaging container according to one embodiment of the present invention, viewed from the bottom side. FIG. FIG. 4 is a side view of the container body as seen from a corner portion. 3A is a cross-sectional view taken along line CC in FIG. 3, and FIG. 3 is a cross-sectional view corresponding to AA in FIG. 2, showing the packaging container in an open state. FIG. 6 is an enlarged view of a main portion of FIG. 5 . FIG. 7 is a cross-sectional view corresponding to FIG. 6, showing the packaging container in a closed state. 3 is an enlarged cross-sectional view of a main part corresponding to B-B in FIG. 2, showing the packaging container in an open state. FIG. 9 is a cross-sectional view corresponding to FIG. 8 and showing the packaging container in a closed state. FIG. 4 is a diagram showing an example of the container body in use.

The following describes a packaging container according to one embodiment of the present invention with reference to Figs. 1 to 10. The container is a transparent container with a lid that can hold various contents, and various foods are particularly suitable as contents. The container has a rectangular shape in a plan view, and has four sides and four corners. Figs. 5 to 7 are vertical cross-sectional views at the center of the sides, and Figs. 8 and 9 are vertical cross-sectional views at the corners.

As shown in FIG. 5, the container has a container body 1 that is open at the top, and a lid 2 that is removably attached to the container body 1 from above so as to cover and close the opening of the container body 1.

The container body 1 and the lid 2 are formed by so-called sheet molding. Examples of sheet molding include vacuum forming, pressure forming, vacuum pressure forming, double-sided vacuum forming, and hot plate forming. In any case, they are formed by thermoforming a synthetic resin sheet. The synthetic resin sheet is made of, for example, a styrene-based resin such as polyethylene terephthalate or polystyrene, or an olefin-based resin such as polypropylene or polyethylene, and transparent sheets are used. In addition, stretched sheets obtained by appropriately stretching these sheets are more preferable sheet materials because they can improve heat resistance and strength while maintaining transparency.

<Container body 1>
The container body 1 is rectangular in plan view, and in this embodiment is substantially square in plan view, but may be substantially rectangular in plan view, etc. The container body 1 includes a bottom surface portion 10, a body side surface portion 11 that rises upward while expanding from the peripheral portion of the bottom surface portion 10, and a body flange portion 12 that is provided around the outside of the body side surface portion 11.

The bottom surface portion 10 is generally square in plan view. The bottom surface portion 10 may be provided with unevenness such as ribs. The peripheral portion of the bottom surface portion 10 may have legs 13 protruding downward. In this embodiment, the legs 13 are provided around the peripheral portion of the bottom surface portion 10, but they may be provided only at the four corners, for example. A continuous rib may be provided from the bottom surface portion 10 to the lower portion of the main body side portion 11.

As shown in FIG. 6, the main body horizontal portion 14, the main body lower tapered portion 15, the main body fitting portion 16, and the main body upper tapered portion 17 are provided between the main body side portion 11 and the main body flange portion 12. As shown in FIG. 2, the main body horizontal portion 14, the main body lower tapered portion 15, the main body fitting portion 16, and the main body upper tapered portion 17 are provided around the entire circumference and have a rounded square shape in a plan view. The main body horizontal portion 14 extends approximately horizontally from the upper end of the main body side portion 11 toward the outside. The main body lower tapered portion 15 extends upward from the outer edge of the main body horizontal portion 14. The main body lower tapered portion 15 is an inclined surface that slopes outward toward the upper side, and has a forward tapered shape. The main body fitting portion 16 extends upward from the upper end of the main body lower tapered portion 15. The main body fitting portion 16 is an internal fitting portion. The shape of the body fitting portion 16 may vary, but in this embodiment, it is an inverted taper shape with an inclined surface that slopes inward toward the top. The upper body taper portion 17 extends upward from the upper end of the body fitting portion 16. Like the lower body taper portion 15, the upper body taper portion 17 is an inclined surface that slopes outward toward the top, and has a forward taper shape.

The body flange portion 12 extends outward from the upper end (outer edge) of the upper body tapered portion 17. The body flange portion 12 has a body flange upper surface portion 20, a body skirt portion 21, and a body edging portion 22. As shown in FIG. 2, the body flange upper surface portion 20 and the body skirt portion 21 are square-shaped with rounded corners in a plan view. The body flange upper surface portion 20 extends outward approximately horizontally from the upper end of the upper body tapered portion 17. The body skirt portion 21 extends downward from the outer edge of the body flange upper surface portion 20. The body skirt portion 21 is an inclined surface that slopes outward as it approaches the bottom.

The body edging 22 extends from the lower end of the body skirt 21 toward the outside in a generally horizontal manner. At least the outer peripheral edge of the body edging 22 may be provided with numerous extremely fine irregularities to reinforce the surface and prevent fingers from being cut when they come into contact with the surface. These irregularities are wavy when viewed enlarged from the front, with numerous peaks and valleys formed in a short direction in the width direction on each side and formed along the radial direction in a plan view on the corners. The irregularities are formed by knurling, such as flat knurling or twill knurling, and are preferably formed by twill knurling to prevent slipping.

A main body gripping portion 23 is provided at the corners of the main body edging portion 22. A main body gripping portion 23 may be provided at each corner. When a main body gripping portion 23 is provided at the corners, the rounded corner shape of the outer edge of the main body edging portion 22 in a plan view has a smaller radius of curvature than the rounded corner shapes of the main body flange upper surface portion 20 and the main body skirt portion 21, resulting in a pointed shape.

<Main body side portion 11>
The main body side portion 11 extends from the periphery of the bottom portion 10 while expanding outward. That is, the main body side portion 11 has a forward tapered shape that is inclined outward toward the upper side as a whole. The main body side portion 11 is provided between the bottom portion 10 and the main body horizontal portion 14, and connects the bottom portion 10 and the main body horizontal portion 14 vertically. The main body side portion 11 has four main side portions 30 provided corresponding to the four sides of a square (rectangle), and four corner chamfered portions 31 provided at each corner portion corresponding to the four vertices of the square. In this embodiment, the four main side portions 30 are all the same shape, but may be different. Similarly, the four corner chamfered portions 31 are all the same shape, but may be different. The corner chamfered portions 31 are provided between a pair of main side portions 30 adjacent to each other on the left and right. The main side surface portion 30 may have a shape that is generally wider toward the top, and the corner chamfered portion 31 may have a shape that is generally wider toward the bottom.

<Main side surface portion 30>
The main side surface portion 30 occupies a large part of the main body side surface portion 11. The main side surface portion 30 rises from the edge of the peripheral portion of the bottom surface portion 10 while inclining outward toward the upper side. The main side surface portion 30 is flat, and no unevenness is formed in the main portion except for the peripheral portion. It is preferable that a blocking prevention convex portion 32 is formed at the upper end of the main side surface portion 30 to prevent a phenomenon (blocking phenomenon) in which the container bodies 1 are tightly fitted together and cannot be separated when stacked up and down. In addition, a rib continuing from the bottom surface portion 10 may be provided at the lower end of the main side surface portion 30. It is to be noted that the main side surface portion 30 is a flat surface that is not curved in this embodiment, but may be a curved surface that is curved inward or outward along the vertical direction or the horizontal direction. The main side surface portion 30 is an inclined surface that is inclined outward toward the upper side. The inclination angle θ1 of the main side surface portion 30 with respect to the horizontal plane is smaller than 90 degrees. The inclination angle with respect to the horizontal plane is simply called the inclination angle.

<Corner chamfered portion 31>
The corner chamfered portion 31 is provided over the entire vertical length (total height) of the main body side portion 11. In other words, the corner chamfered portion 31 is provided over the entire vertical length between the bottom portion 10 and the main body horizontal portion 14. The corner chamfered portion 31 has a main chamfered portion 40, an upper chamfered portion 41, and a lower chamfered portion 42. The corner chamfered portion 31 is divided into three upper and lower regions by the main chamfered portion 40, the upper chamfered portion 41, and the lower chamfered portion 42. From the top, the upper chamfered portion 41, the main chamfered portion 40, and the lower chamfered portion 42 are arranged in this order.

<Main chamfered portion 40>
The main chamfered portion 40 constitutes a main portion of the corner chamfered portion 31. The main chamfered portion 40 is located at the center of the corner chamfered portion 31 in the vertical direction. The vertical length of the main chamfered portion 40 is longer than the vertical length of the upper chamfered portion 41 and longer than the vertical length of the lower chamfered portion 42. The main chamfered portion 40 is the portion of the corner chamfered portion 31 that has the longest vertical length. The vertical length of the main chamfered portion 40 exceeds 1/3 of the total vertical length of the corner chamfered portion 31. It is preferable that the width (dimension in the left-right direction) of the main chamfered portion 40 is wider toward the bottom. In detail, the width of the main chamfered portion 40 gradually becomes wider toward the bottom, and more specifically, it increases toward the bottom at a constant rate. When the main chamfered portion 40 is viewed from the front, the shape of the main chamfered portion 40 is approximately trapezoidal. It is preferable that the main chamfered portion 40 is a flat surface that is not curved in the vertical and left-right directions. The main chamfered portion 40 is an inclined surface that inclines outwardly as it approaches the upper side. In other words, the main chamfered portion 40 has a forward tapered shape. The inclination angle θ2 of the main chamfered portion 40 is smaller than the inclination angle θ1 of the main side surface portion 30. The main chamfered portion 40 has a gentler inclination than the main side surface portion 30. The inclination angle θ2 of the main chamfered portion 40 is preferably 5 degrees to 30 degrees smaller than the inclination angle θ1 of the main side surface portion 30, and more preferably 10 degrees to 20 degrees smaller.

<Upper chamfered portion 41>
The upper chamfered portion 41 is located above the main chamfered portion 40 and extends upward from the main chamfered portion 40. The upper chamfered portion 41 is located between the main chamfered portion 40 and the main horizontal portion 14, and connects the main chamfered portion 40 and the main horizontal portion 14 vertically. The width of the upper chamfered portion 41 may vary, but may be substantially constant along the vertical direction or may be slightly narrower toward the lower side. When the upper chamfered portion 41 is viewed from the front, the shape of the upper chamfered portion 41 is substantially square or substantially inverted trapezoid. It is preferable that the upper chamfered portion 41 is a flat surface that is not curved in the vertical and horizontal directions. The upper chamfered portion 41 is an inclined surface that is inclined outward toward the upper side. In other words, the upper chamfered portion 41 has a forward tapered shape.

The inclination angle θ3 of the upper chamfered portion 41 is greater than the inclination angle θ2 of the main chamfered portion 40. The upper chamfered portion 41 is steeper than the main chamfered portion 40. The inclination angle θ3 of the upper chamfered portion 41 is preferably 0.5 degrees to 30 degrees greater than the inclination angle θ2 of the main chamfered portion 40, more preferably 5 degrees to 25 degrees greater, and even more preferably 10 degrees to 20 degrees greater. When the difference between the inclination angle θ3 of the upper chamfered portion 41 and the inclination angle θ2 of the main chamfered portion 40 is 10 degrees or more, the effect of the upper chamfered portion 41 in tensioning the force from above is significantly obtained, while when the difference between the inclination angle θ3 of the upper chamfered portion 41 and the inclination angle θ2 of the main chamfered portion 40 is 20 degrees or less, the inclination of the main chamfered portion 40 is not too gentle. The inclination angle θ3 of the upper chamfer 41 is preferably the same as or smaller than the inclination angle θ1 of the main side surface portion 30, and the upper chamfer 41 is preferably inclined at the same gradient as the main side surface portion 30 or at a gentler gradient. The inclination angle θ3 of the upper chamfer 41 is preferably 0 degrees to 10 degrees smaller than the inclination angle θ1 of the main side surface portion 30, and more preferably 0 degrees to 5 degrees smaller.

A bent portion 43 is provided at the boundary between the upper chamfered portion 41 and the main chamfered portion 40. The bent portion 43 extends in the horizontal direction. At the bent portion 43, the upper chamfered portion 41 is bent toward the inside of the container relative to the main chamfered portion 40.

<Lower chamfered portion 42>
The lower chamfered portion 42 is located below the main chamfered portion 40 and extends downward from the main chamfered portion 40. The lower chamfered portion 42 is located between the main chamfered portion 40 and the bottom surface portion 10, and connects the main chamfered portion 40 and the bottom surface portion 10 vertically. The vertical length of the lower chamfered portion 42 is longer than the vertical length of the upper chamfered portion 41. The width of the upper end of the lower chamfered portion 42 is wider than the width of the lower end of the upper chamfered portion 41. The lower chamfered portion 42 has a larger area than the upper chamfered portion 41. The width of the lower chamfered portion 42 may vary, but in this embodiment, it narrows toward the bottom. When the lower chamfered portion 42 is viewed from the front, the shape of the lower chamfered portion 42 is approximately an inverted trapezoid. It is preferable that the lower chamfered portion 42 is a flat surface that is not curved in the vertical and horizontal directions. The lower chamfered portion 42 is an inclined surface that is inclined outward toward the upper side. That is, the lower chamfered portion 42 has a forward tapered shape.

The inclination angle θ4 of the lower chamfered portion 42 is greater than the inclination angle θ2 of the main chamfered portion 40. The lower chamfered portion 42 is bent toward the outside of the container relative to the main chamfered portion 40. The lower chamfered portion 42 is more steeply inclined than the main chamfered portion 40. The inclination angle θ4 of the lower chamfered portion 42 is preferably 1 to 45 degrees greater than the inclination angle θ2 of the main chamfered portion 40, more preferably 1 to 10 degrees greater, and even more preferably 1 to 5 degrees greater. By making the difference between the inclination angle θ4 of the lower chamfered portion 42 and the inclination angle θ2 of the main chamfered portion 40 1 degree or more, the lower chamfered portion 42 can exert a bracing effect against a force from above, while by making the difference between the inclination angle θ4 of the lower chamfered portion 42 and the inclination angle θ2 of the main chamfered portion 40 5 degrees or less, the inclination of the main chamfered portion 40 is not too gentle.

However, the inclination angle θ3 of the upper chamfered portion 41 is preferably greater than the inclination angle θ4 of the lower chamfered portion 42. That is, the upper chamfered portion 41 is preferably steeper than the lower chamfered portion 42. The upper chamfered portion 41 may be the steepest in the corner chamfered portion 31. The inclination angle θ3 of the upper chamfered portion 41 is preferably 1 to 20 degrees greater than the inclination angle θ4 of the lower chamfered portion 42, and more preferably 1 to 15 degrees greater. The inclination angle θ4 of the lower chamfered portion 42 is preferably smaller than the inclination angle θ1 of the main side surface portion 30, and the lower chamfered portion 42 is preferably more gently inclined than the main side surface portion 30. The inclination angle θ4 of the lower chamfered portion 42 is preferably 1 to 30 degrees greater than the inclination angle θ2 of the main chamfered portion 40, and more preferably 5 to 15 degrees greater.

A step 44 may be provided at the boundary between the lower chamfered portion 42 and the main chamfered portion 40. The dimension of the step 44 in the container inner/outer direction is small, about 1 mm. A bent portion may be provided at the boundary between the lower chamfered portion 42 and the main chamfered portion 40, similar to the boundary between the upper chamfered portion 41 and the main chamfered portion 40. A step may also be provided at the boundary between the upper chamfered portion 41 and the main chamfered portion 40. The step 44 extends in the horizontal direction. By providing the step 44, the upper end of the lower chamfered portion 42 is located inside the container relative to the lower end of the main chamfered portion 40.

<Auxiliary chamfered portion 45>
An auxiliary chamfered portion 45 may be provided on each of the left and right sides of the lower chamfered portion 42. The auxiliary chamfered portion 45 is provided between the lower chamfered portion 42 and the main side surface portion 30. The pair of left and right auxiliary chamfered portions 45 may have a symmetrical shape and be arranged symmetrically with each other. The shape of the auxiliary chamfered portion 45 in a front view is arbitrary, but may be a shape that narrows toward the upper side as in this embodiment, specifically a triangle. The auxiliary chamfered portion 45 is bent toward the inside of the container with respect to the lower chamfered portion 42.

<Boundary rib 46>
A boundary rib 46 having a width of about 1 mm extending in the vertical direction may be provided at the boundary between the main side surface portion 30 and the upper chamfered portion 41, the boundary between the main side surface portion 30 and the main chamfered portion 40, the boundary between the main side surface portion 30 and the lower chamfered portion 42, or the boundary between the auxiliary chamfered portion 45. The boundary rib 46 may be a protrusion protruding outward. The cross-sectional shape of the boundary rib 46 may be, for example, a generally arc-shaped cross section. The boundary rib 46 is a thin stripe-like shape that does not substantially affect visibility. By providing a narrow boundary rib 46 at the boundary in this manner, it is possible to improve the strength while ensuring visibility at the corner portion.

<Lid 2>
The lid 2 is formed in a planar shape corresponding to the container body 1, and in this embodiment, is a square shape in planar view. The lid 2 includes a top surface portion 50, a lid side surface portion 51 that expands downward from the peripheral portion of the top surface portion 50 and descends, and a lid flange portion 52 that is provided around the outside of the lid side surface portion 51. As shown in FIG. 6, a lid horizontal portion 53, a lid lower taper portion 54, a lid fitting portion 55, and a lid upper taper portion 56 are provided around the lid side surface portion 51 and the lid flange portion 52. The lid horizontal portion 53 extends substantially horizontally from the lower end of the lid side surface portion 51 toward the outside. The lid horizontal portion 53 corresponds to the main body horizontal portion 14. The lid lower taper portion 54 extends upward from the outer edge of the lid horizontal portion 53. The lid lower taper portion 54 is an inclined surface that extends outward toward the upper side, and has a forward taper shape. The lid lower taper portion 54 corresponds to the main body lower taper portion 15. The lid fitting portion 55 extends upward from the upper end of the under-lid tapered portion 54. The lid fitting portion 55 is an inner fitting portion, and fits inside the main body fitting portion 16. The shape of the lid fitting portion 55 may be various, but in this embodiment, it is an inverted tapered shape with an inclined surface that slopes inward as it approaches the upper side. The upper-lid tapered portion 56 extends upward from the upper end of the lid fitting portion 55. Like the under-lid tapered portion 54, the upper-lid tapered portion 56 is an inclined surface that slopes outward as it approaches the upper side, and has a forward tapered shape. The upper-lid tapered portion 56 corresponds to the upper-main body tapered portion 17.

The lid flange portion 52 extends outward from the upper end (outer edge) of the lid upper tapered portion 56. The lid flange portion 52 corresponds to the main body flange portion 12. The lid flange portion 52 has a lid flange upper surface portion 60, a lid skirt portion 61, and a lid edging portion 62. The lid flange upper surface portion 60 extends outward from the upper end of the lid upper tapered portion 56 approximately horizontally. The lid flange upper surface portion 60 corresponds to the main body flange upper surface portion 20. The lid skirt portion 61 extends downward from the outer edge of the lid flange upper surface portion 60. The lid skirt portion 61 is an inclined surface that slopes outward as it approaches the lower side. The lid skirt portion 61 corresponds to the main body skirt portion 21. The lid edging portion 62 extends outward approximately horizontally from the lower end of the lid skirt portion 61. At least on the outer peripheral edge side of the lid edging portion 62, a large number of extremely fine irregularities may be formed, similar to the main body edging portion 22. As shown in Figures 8 and 9, a lid knob 63 may be provided at the corner of the lid edge 62. The lid edge 62 corresponds to the main body edge 22, and the lid knob 63 corresponds to the main body knob 23. To facilitate the lid opening operation, the main body knob 23 may be provided with an upward protrusion 24, and the lid knob 63 may be provided with a downward protrusion 64. The upward protrusion 24 and the downward protrusion 64 may be, for example, hemispherical.

Figure 7 shows a cross-sectional view at the center of the edge. As shown in Figure 7, in the closed state, the lid horizontal portion 53 abuts and overlaps with the main body horizontal portion 14 from above. The lid under taper portion 54 faces the upper side of the main body lower taper portion 15, and the lid under taper portion 54 faces the upper side of the main body upper taper portion 17. The lid fitting portion 55 fits inside the main body fitting portion 16. The lid flange upper surface portion 60 also abuts against the upper side of the main body flange upper surface portion 20, or overlaps with a small gap between them.

When changing from an open state to a closed state, because this is an internally interlocking container, it is necessary to press the lid 2 firmly against the container body 1 from above. In particular, for containers that are rectangular in shape when viewed from above, it is difficult to interlock at the corners, so it is necessary to press the lid 2 firmly against the container body 1 at each corner more strongly than at the center of the sides.

Figures 8 and 9 show cross-sectional views of the corner portion. The corner portion is provided with an upper chamfered portion 41 and a lower chamfered portion 42 that are steeper than the main chamfered portion 40. Therefore, when the lid 2 is pressed against the container body 1 to fit inside, the steeply sloping upper chamfered portion 41 and lower chamfered portion 42 firmly brace themselves against the pressing force from above. Therefore, even if the sheet thickness is thin, the strength of the container body 1 can be ensured, and deformation of the container body 1 during the lid closing operation can be suppressed.

In particular, because the upper chamfered portion 41 is steeper than the lower chamfered portion 42, the upper chamfered portion 41 can firmly support the main body horizontal portion 14 even if a large force acts on the main body horizontal portion 14. Furthermore, because the steeply sloping lower chamfered portion 42 is provided below the main chamfered portion 40, even if the upper chamfered portion 41 and the main chamfered portion 40 try to tilt outward, the lower chamfered portion 42 exerts a bracing function to suppress this. Therefore, the lid fitting portion 55 can be firmly and reliably fitted into the main body fitting portion 16.

On the other hand, because the main chamfered portion 40, which constitutes the main portion of the corner chamfered portion 31, is gently inclined, when grasping the container body 1 from below as shown in FIG. 10, for example, the thumb or the like can be placed against the main chamfered portion 40 to hold the container body 1 firmly and stably. In particular, because the main chamfered portion 40 is formed to be wider toward the downward side, the thumb or the like pointing upward can be easily placed against the main chamfered portion 40 to grasp the container body 1 from below. Moreover, because the lower chamfered portion 42 is also wide, the thumb or the like can be easily placed from the lower chamfered portion 42 to the main chamfered portion 40.

LIST OF SYMBOLS 1 Container body 2 Lid 10 Bottom surface 11 Body side surface 12 Body flange 13 Leg 14 Body horizontal surface 15 Body lower tapered surface 16 Body fitting surface 17 Body upper tapered surface 20 Body flange upper surface 21 Body skirt 22 Body edging 23 Body grip 24 Upward protrusion 30 Main side surface 31 Corner chamfer 32 Anti-blocking convex 40 Main chamfer 41 Upper chamfer 42 Lower chamfer 43 Bending surface 44 Step 45 Auxiliary chamfer 46 Boundary rib 50 Top surface 51 Lid side surface 52 Lid flange 53 Lid horizontal surface 54 Lid lower tapered surface 55 Lid fitting surface 56 Lid upper tapered surface 60 Lid flange upper surface 61 Lid skirt 62 Lid edging 63 Lid knob 64 Downward projection θ1 Slope angle of main side surface θ2 Slope angle of main chamfer θ3 Slope angle of upper chamfer θ4 Slope angle of lower chamfer

Claims (1)

A transparent packaging container comprising a container body having a rectangular shape in a plan view and a lid for covering an opening of the container body,
The container body has a bottom surface, a body side surface rising from the bottom surface, and a body flange provided on the outer side of the body side surface,
The corners of the side of the main body are provided with chamfered corners that are inclined outward toward the upper side,
The corner chamfered portion has a main chamfered portion constituting a main portion of the corner chamfered portion, an upper chamfered portion provided above the main chamfered portion and having a larger inclination angle with respect to the horizontal plane than the main chamfered portion, and a lower chamfered portion provided below the main chamfered portion and having a larger inclination angle with respect to the horizontal plane than the main chamfered portion,
The main chamfered portion, the upper chamfered portion, and the lower chamfered portion are each formed on a flat surface that is not curved in the up-down or left-right direction and has no irregularities ,
The inclination angle of the upper chamfer with respect to the horizontal plane is greater than the inclination angle of the lower chamfer with respect to the horizontal plane,
The vertical length of the main chamfered portion is longer than the vertical length of the upper chamfered portion and the vertical length of the lower chamfered portion,
The vertical length of the lower chamfer is longer than the vertical length of the upper chamfer,
A packaging container , wherein the width of the main chamfered portion increases downward, and the width of the upper end of the lower chamfered portion is wider than the width of the lower end of the upper chamfered portion .

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