JP2021011312A - Packaging container lid and packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid of a packaging container and a packaging container which can be easily attached to the container body with the minimum force and the minimum man-hours by an operator, in addition to the strength to withstand the stacking of another container body. SOLUTION: A lid of a packaging container includes a top surface portion 1, a side wall step portion 2 hanging downward from the peripheral edge, and a side wall portion 3 extending downward from the peripheral edge and sloping. From the flange step portion 4 inclined upward from the lower end edge of the side wall portion 3, the flat flange portion 5 extending outward from the upper end edge of the flange step portion 4, and the outer peripheral edge of the flange portion 5. A fitting wall portion 6 that hangs down on the lower side is provided, and the side wall portion 3 has a convex shape that protrudes outward from the first side wall portion 31 and the second side wall portion 32 that are adjacent to the corner portions and is gently inclined. 33, the upper end of the protruding portion 33 is located at the upper end edge of the side wall portion 3, the lower end portion of the protruding portion 33 is located outside the inner peripheral end edge of the flange portion 5, and the protruding portion 33 The end face shape from the upper end to the lower end is characterized by being linear. [Selection diagram] Fig. 2

Description

The present invention relates to, for example, a lid of a packaging container and a packaging container to be attached to a container body on which food is placed.

Conventionally, the lid of a packaging container for storing foods such as bento boxes and prepared foods sold at supermarkets and convenience stores has been selected in consideration of the type of food and the shape of the container body. However, when the lid was changed, it was necessary to devise a way to attach it to the container body (how to close the lid). That is, depending on how each lid is closed, there is a risk that the lid may not be completely closed, or the lid or container body may be bent or damaged.

In addition, there is also a case in which a container holder of another packaging container is stacked on the lid of the packaging container. For example, a round corner that bulges outward and in an arc shape on a part of the peripheral wall that goes downward from the outer edge of the top surface, and an inward and concave curved surface near the corner where the top surface and the round corner meet. A technique is disclosed in which a round corner portion and a concave curved surface portion function integrally with a lid body provided with a concave curved surface portion to increase the strength of the lid body against a load in the vertical direction during stacking (Patent Document 1). reference.).

JP-A-2018-140787

However, Patent Document 1 does not describe how to close the lid by an operator. That is, the lid body externally fits the engaging portion formed at a predetermined position of the hanging lower surface portion hanging from the outer edge of the flange portion to the container body, and the operator applies a force to any part of the lid body. Since it is unclear whether the lid is attached to the container body, there is a concern that the same problem as before may occur depending on how the lid is closed, or that it may take time to close the lid.

In particular, in a lid having a high top surface as in Patent Document 1, the degree and location of pressurization tend to affect the lid. For example, since the top surface portion has a large area, it is easy for the operator to pressurize it, but depending on the degree of closure, not only the top surface portion but also other parts are easily bent or damaged. Further, since the flange portion is in contact with the container body, it is easy for the operator to grasp it, but it is difficult to close it unless pressure is applied to each engaging portion. In response to such problems, the inventors have arrived at a structure of a lid that is easily bent and damaged during stacking and mounting, and is easy to mount on the container body, as a result of ingenuity.

Therefore, an object of the present invention is to provide a lid of a packaging container and a packaging container that can be easily attached to the container body with the minimum force and the shortest man-hours by an operator, in addition to the strength to withstand the stacking of another container body. To provide.

That is, the lid of the packaging container in the present invention has a top surface portion, a side wall portion that extends downward from the peripheral edge of the top surface portion and has a corner portion, and an outer side of the lower end edge of the side wall portion. A flange portion extending to the surface and a fitting wall portion hanging below the outer peripheral edge of the flange portion are provided, and the side wall portion includes a first side wall portion and a second side wall portion adjacent to the corner portion. It has a convex protrusion that protrudes outward from the side wall and is gently inclined, the upper end of the protrusion is located at the upper edge of the side wall, and the lower end of the protrusion is of the flange. It is located outside the inner peripheral edge, and the end face shape from the upper end to the lower end of the protruding portion is linear.

Further, the lid of the packaging container further includes a side wall step portion that hangs downward from the peripheral edge of the top surface portion and has corner portions scattered in the circumferential direction, and the side wall portion is the side wall step portion. The side wall step portion is inclined downward from the lower end edge of the portion, and the side wall step portion has a corner cut portion that is inclined to the corner portion, and the inclination angle between the corner cut portion and the protruding portion is substantially the same. It is desirable that the lower end portion of the corner cutting portion and the upper end portion of the protruding portion are substantially flush with each other.

Further, the lid of the packaging container further includes a flange step portion that is inclined upward from the lower end edge of the side wall portion, and the flange portion extends outward from the upper end edge of the flange step portion. Therefore, it is desirable that the lower end portion of the protruding portion is located outside the inner peripheral edge of the flange portion beyond the flange step portion.

Further, it is desirable that the fitting wall portion has a wide fitting portion at a position close to the lower end portion of the protruding portion.

Further, the packaging container in the present invention is characterized by including a lid of the packaging container and a container body that is externally fitted to the fitting portion of the lid.

The lid of the packaging container according to the present invention can be expected to have the effect of being easily attached to the container body with the minimum force and the shortest man-hours by the operator, in addition to the strength to withstand the stacking of another container body. That is, since the minimum external force applied to the top surface from the palm and fingertips of the worker is easily transmitted to the flange through the protrusion, it is easy to fit into the container body without bending or breaking. It can be expected that the lid will be attached to the body.

It is a perspective view of the packaging container in which the lid is located above the container body in one embodiment of the present invention. It is a top view of the lid body. It is an enlarged front perspective view of the corner part of the lid body. It is an enlarged end view of the AA portion shown in FIG. 2 of the lid body. It is a top view of another lid body in one Embodiment of this invention. It is an enlarged front perspective view of the corner part of the lid body.

Hereinafter, the packaging container (hereinafter, also referred to as “the present packaging container”) according to the embodiment of the present invention will be described with reference to FIGS. 1 and 4.
In the figure, for the same multiple parts, only one part may be numbered, and overlapping parts may be omitted. For convenience of explanation, predetermined parts and leader lines are indicated by broken lines or imaginary lines (dashed-dotted lines).

<Overview of packaging container>
As shown in FIG. 1, the packaging container C includes a lid C1 having a substantially rectangular shape and a box-shaped dome shape in a plan view, and a container body C2 having the same shape as the lid C1 and covered with the lid C1 in a plan view. It has.
The shape of the lid C1 and the container body C2 in a plan view may be square, circular, or elliptical. The lid C1 may have a hemispherical dome shape. The size of the lid C1 and the container body C2 is not limited. The foods contained in the packaging container C are sushi, salads, bento boxes, prepared foods, etc., and are not limited.

<Overview of lid>
As shown in FIG. 1, the lid C1 is continuously formed from the top surface portion 1, the side wall step portion 2 that hangs continuously downward from the peripheral edge of the top surface portion 1, and the peripheral edge of the side wall step portion 2. A side wall portion 3 that extends downward and is inclined, a flange step portion 4 that is continuously inclined upward from the lower end edge of the side wall portion 3, and a flange step portion 4 that is continuously extended outward from the upper end edge of the flange step portion 4. It includes a flat flange portion 5 and a fitting wall portion 6 that continuously hangs downward from the outer peripheral edge of the flange portion 5.
The shape of the top surface portion 1, the side wall step portion 2, the side wall portion 3, the flange step portion 4, and the flange portion 5 in a plan view may be the same as that of the lid C1, or may be square, circular, oval, or the like, and are different from each other. You may be. The size and dimensions of the top surface portion 1, the side wall step portion 2, the side wall portion 3, the flange step portion 4, and the flange portion 5 are not limited.

<Overview of the container body>
As shown in FIG. 1, the container body C2 corresponds to an unnumbered bottom on which food is placed and a corner portion of the peripheral edge of the bottom in order to make the bottom higher than the ground plane of furniture or the like on which the container is placed. A concave, unnumbered leg that is continuously provided downward from the position to be used, and an unnumbered main body flange that continuously extends outward from the peripheral edge of the bottom and the outer peripheral edge of the leg. It is provided with a portion and an unnumbered fitting portion provided on the peripheral edge of the main body flange portion for fitting with the lid body C1.

<Explanation of the top surface>
As shown in FIG. 2, the top surface portion 1 has a longitudinal side portion 11, a short side portion 12, and a top surface corner portion 13 continuous with the longitudinal side portion 11 and the short side portion 12.
The long side portion 11 and the short side portion 12 may be linear or curved. The angle of the top surface portion 13 may be inclined by 45 ° with respect to the longitudinal side portion 11 and the lateral side portion 12, or may be inclined at other angles.

<Explanation of the step on the side wall>
As shown in FIG. 2, the side wall step portion 2 is a portion that fits inside the leg portion of the container body when the container body of another packaging container is placed on the lid C1 and is the first side wall. The longitudinal side wall step portion 21 corresponding to the step portion, the short side wall step portion 22 corresponding to the second side wall step portion, and the longitudinal side wall step portion 21 and the short side wall step portion 22 are scattered in the circumferential direction. It has a flat corner cut portion 23 formed in an inclined shape at a position corresponding to a corner portion to be formed. The upper end edge of the side wall step portion 2 corresponds to the peripheral edge of the top surface portion 1.
The height of the side wall step portion 2 is not limited. The long side wall step portion 21 and the short side wall step portion 22 may be flat or curved.

<Explanation of side wall>
As shown in FIG. 2, the side wall portion 3 includes a flat longitudinal side wall portion 31 corresponding to the first side wall portion, a short side wall portion 32 corresponding to the second side wall portion, and a longitudinal side wall portion 31 and a short side wall portion. At a position corresponding to the corner portion formed by the portion 32, the longitudinal side wall portion 31 and the convex protruding portion 33 protruding outward from the short side wall portion 32 and gently inclining are provided. The upper end edge of the side wall portion 3 corresponds to the lower end edge of the side wall step portion 2.
The side wall portion 3 may be inclined by 5 ° to 30 ° with respect to the vertical direction, more preferably 7 to 25 °, and more preferably 10 to 25 °. The long side wall portion 31 and the short side wall portion 32 may be flat or curved.

<Explanation of flange stepped part>
As shown in FIG. 1, the flange step portion 4 forms a groove portion having a predetermined height and width between the side wall portion 3 and the flange portion 5, and is inclined upward from the lower end edge of the side wall portion 3. doing.
According to this configuration, since the flange step portion 4 and the fitting wall portion 6 sandwich the main body flange portion of the container main body C2, the fitting force of the lid body C1 with respect to the container main body C2 can be increased.

<Explanation of flange>
As shown in FIG. 1, the flange portion 5 is a portion facing the main body flange portion when the lid body C1 is attached to the container main body C2.
As shown in FIG. 2, the flange portion 5 has a flange inner peripheral edge 51 which is also a boundary with the flange step portion 4 and a flange outer peripheral edge 52 which is also a boundary with the fitting wall portion 6.

<Explanation of corner cuts>
As shown in FIG. 3, the corner cutting portion 23 includes a corner cutting upper end portion 23a which is a part of the peripheral edge of the top surface corner portion 13 in a plan view, a longitudinal side wall step portion 21, and a lateral side wall step portion 22. It has a linear corner cutting side portion 23b which is a boundary portion of the above and is inclined downward, and a corner cutting lower end portion 23c in which each of the corner cutting side portions 23b is continuously formed in an arc shape. In other words, the corner cutting portion 23 is formed in a substantially semicircular shape and a flat shape by the corner cutting upper end portion 23a, the corner cutting side portion 23b, and the corner cutting lower end portion 23c. The end face shape from the corner cutting upper end portion 23a to the corner cutting lower end portion 23c is a straight line.
According to this configuration, it can be expected that the external force transmitted from the top corner portion 13 can be easily collected from the corner cutting upper end portion 23a to the corner cutting lower end portion 23c via the corner cutting side portion 23b.
The corner cutting side portion 23b may be curved. The corner cutting lower end portion 23c may be linear.

<Explanation of protruding parts>
As shown in FIG. 3, the protruding portion 33 is a boundary portion between the longitudinal side wall portion 31 and the short side wall portion 32, and is a linear protruding first boundary portion 33a that is inclined downward and a protruding first boundary portion 33a. It is a boundary portion between each of the protruding side portion 33b and the protruding side portion 33b, which are formed in a flat shape continuously outward from 33a, and is gently inclined downward from the protruding first boundary portion 33a. A linear protruding second boundary portion 33c, a protruding front portion 33d having a rectangular shape in a front view formed in a continuous outward arch shape from each of the protruding second boundary portions 33c, and a protruding front portion. A protruding upper end portion 33e formed by an arch-shaped upper end portion that is a part of 33d, a linear lower end portion that is a part of a protruding side portion 33b, and an arch-shaped lower end portion that is a part of a protruding front portion 33d. It has a protruding lower end portion 33f formed by a protruding front lower end portion 33fa. The protruding upper end portion 33e is located at the upper end edge of the side wall portion 3, and the protruding lower end portion 33f is located at the flange portion 5. The shape of the end face from the protruding upper end portion 33e to the protruding lower end portion 33f is linear. In other words, the front view of the protruding portion 33 extends from the protruding upper end portion 33e to the protruding lower end portion 33f, and the protruding first boundary portion 33a, the protruding side portion 33b, the protruding second boundary portion 33c, and the protruding front portion 33d are continuous. Then, as it approaches the protruding lower end portion 33f, it projects outward from the longitudinal side wall portion 31 and the lateral side wall portion 32. The width of the protruding front portion 33d is not particularly limited, but may be 7.0 to 13.0 mm, more preferably 9.0 to 11.0 mm, and 7.0 to 15.0 mm. It may be 8.0 to 14.0 mm, or 9.0 to 14.0 mm. The radius of curvature of the protruding front lower end 33fa may be 6.5 to 10 mm, preferably 7.5 mm to 9 mm, more preferably 7.5 mm to 8.5 mm, which is larger than the radius of curvature of the protruding upper end 33e. Therefore, the protruding portion 33 is formed in a divergent shape.
According to this configuration, it can be expected that the external force transmitted from the corner cutting lower end portion 23c is easily transmitted from the protruding upper end portion 33e to the protruding lower end portion 33f via the protruding side portion 33b and the protruding front portion 33d. Specifically, since the protruding front lower end portion 33fa projects to the flat portion of the flange portion 5, the force applied to the top surface portion 1 at the time of closing the lid is directly transmitted to the four corners of the flange portion 5, and directly below the four corners. The effect of smooth fitting by the positioned fitting wall portion 6 can be expected.

<Explanation of the relationship between the corner cut part and the protruding part>
As shown in FIG. 4, the corner cutting lower end portion 23c of the corner cutting portion 23 and the protruding upper end portion 33e of the protruding portion 33 are substantially flush with each other. The inclination angle of the corner cutting portion 23 with respect to the top surface portion 1 and the inclination angle of the protrusion 33 are substantially the same, and are 30 to 50 ° with respect to the vertical direction.
The portion that is continuous in a substantially uniform surface may be a dot shape or a linear shape having a predetermined width. In other words, the boundary portion between the corner cutting lower end portion 23c and the protruding upper end portion 33e, excluding the portion that is continuous in a substantially uniform surface, may be stepped.
According to this configuration, it can be expected that the external force transmitted from the corner cutting lower end portion 23c is easily transmitted by the protruding upper end portion 33e.

<Explanation of the relationship between the protruding part and the flange stepped part>
As shown in FIG. 3, the protruding front lower end 33fa of the protruding lower end 33f is located outside the flange inner peripheral edge 51 of the flange 5 beyond the flange step portion 4.
Even if the apex of the protruding front lower end 33fa reaches the flange outer peripheral edge 52, in other words, even if the distance between the apex of the protruding front lower end 33fa and the flange outer peripheral edge 52 is zero, the protruding front lower end 33fa If has a shape (for example, an arch shape) having a portion protruding from the flat portion of the flange portion 5 except for the apex, the force applied to the top surface portion 1 may not be transmitted to the four corners of the flange portion 5, but the flange. The ratio of the distance from the inner peripheral edge 51 to the flange outer peripheral edge 52 and the distance from the apex of the protruding front lower end 33fa to the flange outer peripheral edge 52 may be 10: 1 to 10: 9, preferably 5 :. It is 1 to 5: 4, more preferably 3: 1 to 3: 2, and even if the ratio is smaller than 10: 1 or larger than 10: 9, the external force transmitted to the protruding front lower end 33fa is fitted. It may be difficult to transmit to the wall portion 6. The distance from the apex of the protruding front lower end 33fa to the flange outer peripheral edge 52 is not particularly limited, but may be 1.5 to 5 mm, preferably 2.0 to 3.5 mm. If it is smaller than 1.5 mm, when the lid is closed, the apex of the protruding front lower end portion 33fa floats and a gap is generated between the protruding front lower end portion 33fa and the flange portion, which impairs the design. Further, if it exceeds 5 mm, it may be difficult to transmit an external force.

<Explanation of fitting wall>
As shown in FIG. 1, the fitting wall portion 6 is externally fitted to the flange portion of the container body C2.
As shown in FIG. 2, the fitting wall portion 6 is formed of a long fitting wall portion 61, a short fitting wall portion 62, a long fitting wall portion 61, and a short fitting wall portion 62. It has a corner-cut fitting wall portion 63 cut at a position corresponding to a corner portion scattered in the circumferential direction.
As shown in FIG. 3, the long fitting wall portion 61, the short fitting wall portion 62, and the corner cutting fitting wall portion 63 are located close to the protruding lower end portion 33f, respectively, with the wide fitting portions 61a. It has 62a and 63a. In other words, the fitting portions 61a, 62a, and 63a are provided on the fitting wall portion 6 in a planar shape so as to surround the protruding lower end portion 33f. The width of the fitting portions 61a and 62a is wider than the width of the protruding lower end portion 33f, and the width of the fitting portion 63a is at least wider than the width of the protruding front lower end portion 33fa.
The widths of the fitting portions 61a, 62a, and 63a may be the same or different, and are not particularly limited, but are preferably 10 to 28 mm, and more preferably 18 to 25 mm. Further, it is preferable that the fitting portion 62a formed on the short fitting wall portion 62 is longer than the fitting portion 61a formed on the longitudinal fitting wall portion 61.
According to this configuration, since the external force is easily transmitted to the fitting portions 61a, 62a, 63a provided along the shape of the protruding lower end portion 33f, it can be expected that the fitting portion is easily fitted to the container body.

The lid body C1 and the container body C2 in the present embodiment may be formed by thermoforming a synthetic resin sheet by, for example, vacuum forming, thermoforming air forming, vacuum forming air forming, double-sided vacuum forming, or the like. Good. As the synthetic resin sheet, for example, a polyester resin such as polyethylene terephthalate, a styrene resin such as polystyrene, or an olefin resin such as polypropylene may be used, and a single-layer or multi-layer sheet may be used. As the resin, for example, it is preferable to use a foamed resin because it is lightweight and has heat insulating properties. Further, the front surface or the back surface of the sheet may be covered with a synthetic resin film, and when the front surface is covered, printing may be performed. The thickness of the synthetic resin sheet is not particularly limited, but may be 0.25 to 0.45 mm.

Next, with reference to FIGS. 5 and 6, a portion different from the lid of the packaging container described above with respect to the lid of another packaging container according to the embodiment of the present invention will be described, and the equivalent portion will be described. The explanation is omitted. In order to facilitate reference, the parts or parts corresponding to the parts or parts shown in FIGS. 2 and 3 are numbered by adding 100 uniformly in FIGS. 2 and 3.

As shown in FIG. 5, the side wall portion 300 has a longitudinal side wall portion 310 and a convex protruding portion 330 that protrudes outward from the lateral side wall portion 320 and is gently inclined at positions corresponding to the corner portions.

As shown in FIG. 6, the radius of curvature of the protruding front lower end portion 330fa may be 4 to 7 mm, preferably 4.5 mm to 6.5 mm, more preferably 5 mm to 6 mm, and the curvature of the protruding upper end portion 330e. Since it is equal to or less than the radius, the width of the protrusion 330 remains the same.

C1 Lid C2 Container body 1 Top surface 2 Side wall stepped part 23 Corner cutting part 23a Corner cutting upper end part 23b Corner cutting upper end part 23c Corner cutting lower end part 3, 300 Side wall part 31, 310 First side wall part (longitudinal side wall part)
32, 320 2nd side wall (short side wall)
33, 330 Protruding part 33a Protruding first boundary part 33b Protruding side part 33c Protruding second boundary part 33d Protruding front part 33e, 330e Protruding upper end part 33f Protruding lower end part 33fa, 330fa Protruding front lower end part 4 Flange step part 5 Flange part 6 Fitting wall portion 61a, 62a, 63a Fitting portion

Claims (5)

The top surface portion, the side wall portion that extends downward from the peripheral edge of the top surface portion and has a corner portion, the flange portion that extends outward from the lower end edge of the side wall portion, and the flange portion. With a fitting wall that hangs below the outer peripheral edge,
The side wall portion has a convex protrusion portion that protrudes outward from the first side wall portion and the second side wall portion adjacent to the corner portion and is gently inclined.
The upper end of the protrusion is located on the upper edge of the side wall, and the lower end of the protrusion is located outside the inner peripheral edge of the flange.
A lid of a packaging container, characterized in that the shape of the end face from the upper end to the lower end of the protruding portion is linear. Further provided with a side wall step portion that hangs downward from the peripheral edge of the top surface portion and has corner portions scattered in the circumferential direction.
The side wall portion extends downward from the lower end edge of the side wall step portion and is inclined.
The side wall step portion has a corner cut portion that is inclined to the corner portion.
The inclination angles of the corner cut portion and the protruding portion are substantially the same.
The lid of a packaging container according to claim 1, wherein the lower end portion of the corner cutting portion and the upper end portion of the protruding portion are continuously formed in a substantially uniform surface. Further provided with a flange step portion that is inclined upward from the lower end edge of the side wall portion.
The flange portion extends outward from the upper end edge of the flange step portion.
The lid of a packaging container according to claim 1 or 2, wherein the lower end portion of the protruding portion is located outside the inner peripheral edge of the flange portion beyond the flange step portion. The lid of a packaging container according to any one of claims 1 to 3, wherein the fitting wall portion has a wide fitting portion at a position close to the lower end portion of the protruding portion. A packaging container comprising the lid of the packaging container according to any one of claims 1 to 4 and a container body that is externally fitted with a fitting portion of the lid.

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