JP7542256B2 - Packaging Containers - Google Patents

Description

This specification discloses a packaging container.

Patent Document 1 discloses a thin top-opening paper box. The paper box includes a bottom wall, a front wall, a rear wall, and a pair of opposing side walls. The front wall, the rear wall, and the pair of opposing side walls are each connected to the bottom wall. Each of the front wall and the rear wall extends to each of the pair of opposing side walls and includes an attachment flap that is attached to each of the pair of opposing side walls. An extension portion is disposed on each of the pair of opposing walls via a fold line. The attachment flap has an excess end portion that is attached to the extension portion of the side wall via the fold line.

Japanese Utility Model Application Publication No. 7-6114

In packaging containers, before placing the packaged items inside, they may be stacked and stored with their lids open. In the above configuration, if paper boxes are stacked with their lids open, a force is applied to the opposing side walls and front wall in a direction that moves them away from each other, which may damage the corners between the opposing side walls and the front wall. The same applies to the corners between the opposing side walls and the rear wall.

This specification provides a technology that prevents damage to the corners of packaging containers when they are stacked with the lid plates open.

The packaging container disclosed in this specification includes a pair of first side panels facing each other, a pair of second side panels facing each other between the pair of first side panels, a bottom panel connected to each of the pair of first side panels and the pair of second side panels, a lid portion connected to at least one first side panel of the pair of first side panels and facing the bottom panel with a gap when the lid portion is closed, a pair of extension flaps connected to each of the pair of second side panels and overlapping the lid portion when the lid portion is closed, and a small portion of the pair of second side panels from the at least one first side panel on which the lid portion is arranged and the lid portion. and a fixing piece extending between at least one of the second side panels and the extension flap connected to the second side panel, and fixed to the second side panel and the extension flap connected to the second side panel, each fixing piece being disposed at a corner between the first side panel and the second side panel, and extending from the second side panel to the extension flap across the boundary between the second side panel and the extension flap, and may have a first fold line along the boundary between the second side panel and the extension flap, and a second fold line that bends around the extension flap to which the fixing piece is fixed when the lid is closed.

In the above packaging container, the fixing piece arranged at the corner of the packaging container extends from both the first side plate and the lid to both the second side plate and the extension flap. As a result, when the lid is open, the fixing piece is arranged not only at the corner of the first side plate and the second side plate, but also between the lid and the extension flap. With this configuration, by increasing the dimensions of the fixing piece, it is possible to prevent the fixing piece from being damaged by a force acting in a direction that moves the first side plate and the second side plate away from each other when the packaging containers are stacked with the lid open.

The pair of first side plates and the pair of second side plates may be inclined so that the opening defined by the pair of first side plates and the pair of second side plates widens upward. This configuration makes it easier to stack and arrange packaging containers with the lids open.

When the extension flap and the second side panel are arranged on the same plane, the extension flap may be longer than the second side panel in the vertical direction, and the fixing piece above the boundary between the second side panel and the extension flap may be longer than the second side panel. With this configuration, the dimension of the fixing piece can be increased in the vertical direction, thereby suppressing damage to the fixing piece.

In a state where each of the pair of extension flaps is disposed on the extension of each of the pair of second side panels, and the lid portion is disposed on the extension of the first side panel, a gap is provided between the extension flap and the lid portion, the fixing piece passes through the gap between the extension flap and the lid portion and extends from the lid portion to the extension flap, and the second fold line may be disposed on the boundary between the portion located in the gap between the extension flap and the lid portion and the portion overlapping the extension flap. In this configuration, when the extension flap is folded from the extension of the second side panel, the fixing piece bends at the second fold line in accordance with the movement of the extension flap. As a result, the lid portion is pulled by the fixing piece from the extension of the first side panel in the direction in which the lid portion is closed. This makes it easier to close the lid portion from an open state.

The lid portion includes a pair of cover plates connected to each of the pair of first side plates, and the fixing piece may extend from the first side plate and the cover plate connected to the first side plate to each of the pair of second side plates and the extension flap connected to the second side plate, and be fixed to the second side plate and the extension flap connected to the second side plate. In the above packaging container, a cover plate is disposed on each of the pair of first side plates facing each other. Also, the fixing piece extends from the pair of first side plates and the pair of cover plates to the pair of second side plates and the pair of extension flaps. As a result, when the cover plate is open, the fixing piece is disposed not only at the corners of the first side plate and the second side plate, but also between the cover plate and the extension flap. With this configuration, it is possible to suppress a situation in which the fixing piece is damaged by a force in a direction in which the first side plate and the second side plate are separated from each other.

FIG. 2 is a perspective view of the packaging container with the lid plate open. FIG. 2 is a perspective view of the packaging container with the lid plate closed. FIG. 2 is a front view of the packaging container with the lid plate closed. An expanded packaging container. Close-up of the adhesive flap with the cover plate open. FIG. 4 is a perspective view of the packaging container in a state where the lid plate is in the middle of being closed. FIG. 2 is a perspective view of multiple packaging containers stacked with the lid plates open.

(Example)
The packaging container 10 shown in Fig. 1 and Fig. 2 is used for delivery. The use of the packaging container 10 is not limited to delivery, and it may be used for storage, gift giving, etc. Fig. 1 shows the up-down direction, front-rear direction, and left-right direction used throughout this embodiment. These up-down direction, front-rear direction, and left-right directions are used to facilitate the explanation of this embodiment, and do not specify the direction in which the packaging container 10 is used.

The packaging container 10 is a hexahedron made up of six rectangles. Four of the sides of the packaging container 10 are inclined so that they widen upward.

As shown in FIG. 4, the packaging container 10 is assembled by folding a sheet of corrugated cardboard unfoldable body BL along the folding lines. The corrugated cardboard has a thickness of, for example, 1.0 mm. The thickness and material of the unfoldable body BL are not particularly limited. In FIG. 4, the folding lines are drawn with thin dashed lines. The folding lines have grooves formed therein to facilitate folding. In a modified example, the folding lines may not have grooves, as in other parts. The packaging container 10 includes a bottom plate 12, a pair of first side plates 22, 24, a pair of second side plates 26, 28, a pair of cover plates 32, 34, a pair of extension flaps 42, 44, and four adhesive pieces 50.

The bottom plate 12 has a rectangular flat plate. A pair of first side plates 22, 24 are connected to a pair of edges 12a, 12a of the four edges of the bottom plate 12 that extend parallel to each other via a bend line. The first side plate 22 has a trapezoidal flat plate with an upper edge longer than a lower edge. The first side plate 24 has the same shape as the first side plate 22. A pair of second side plates 26, 28 are connected to a pair of edges 12b, 12b of the four edges of the bottom plate 12 that extend parallel to each other via a bend line. The second side plate 26 has a trapezoidal flat plate with an upper edge longer than a lower edge. The second side plate 26 has a length slightly shorter than the first side plates 22, 24 in the vertical direction. The second side plate 28 has the same shape as the second side plate 26.

As shown in FIG. 1, the pair of first side plates 22, 24 are adjacent to the pair of second side plates 26, 28. The pair of first side plates 22, 24 and the pair of second side plates 26, 28 have a rectangular cylindrical shape that surrounds the periphery of the bottom plate 12. Each of the second side plates 26, 28 is inclined upward from the bottom plate 12 toward the outside of the packaging container 10 (see FIG. 3). The distance between the second side plates 26, 28 increases from the bottom plate 12 toward the top. Similarly, each of the first side plates 22, 24 is inclined upward from the bottom plate 12 toward the outside of the packaging container 10. The distance between the first side plates 22, 24 increases from the bottom plate 12 toward the top. Therefore, in the packaging container 10, the opening surrounded by the pair of first side plates 22, 24 and the pair of second side plates 26, 28 increases upward.

The extension flap 42 is connected to the upper edge of the second side panel 26 via a fold line. The extension flap 42 is arranged over the entire length of the upper edge of the second side panel 26 in the front-rear direction. When the extension flap 42 and the second side panel 26 are arranged on the same plane, the extension flap 42 is longer than the second side panel 26 in the up-down direction. Each of the front-rear end edges of the extension flap 42 is inclined so that the extension flap 42 becomes shorter in the front-rear direction as it moves away from the second side panel 26. An opening 26a is arranged along the fold line at the boundary between the extension flap 42 and the second side panel 26. The opening 26a is located in the center of the second side panel 26 in the front-rear direction. The extension flap 44 is connected to the upper edge of the second side panel 28 via a fold line. The extension flap 44 has the same shape as the extension flap 42. An opening 28a is arranged along the fold line at the boundary between the extension flap 44 and the second side panel 28. The opening 28a is arranged in the same position as the opening 26a in the front-rear direction.

A lid plate 32 is connected to the upper edge of the first side plate 22 via a fold line. The lid plate 32 has a generally rectangular shape with a rounded corner on the side opposite the first side plate 22. As shown in FIG. 2, when the lid plate 32 is closed, it extends from the first side plate 22 beyond the center of the packaging container 10 in the front-to-rear direction to the first side plate 24 side. The lid plate 32 is spaced apart from the first side plate 24 in the front-to-rear direction. Insert pieces 32a, 32b that are inserted into the openings 26a, 28a, respectively, are attached to the left and right edges of the lid plate 32.

The lid plate 34 is connected to the upper edge of the first side plate 24 via a fold line. The lid plate 34 has a generally rectangular shape with a rounded corner on the side opposite the first side plate 22. As shown in FIG. 2, when the lid plate 34 is closed, it extends from the first side plate 24 beyond the center of the packaging container 10 in the front-to-rear direction to a position where it overlaps with the lid plate 32. When the lid plates 32, 34 are closed, the lid plates 32, 34 face the bottom plate 12 with a gap between them.

The cover plates 32, 34 can be rotated relative to the first side plates 22, 24 between a state in which the cover plates 32, 34 are open as shown in FIG. 1 and a state in which the cover plates 32, 34 are closed as shown in FIG. 2. When the cover plates 32, 34 are open, the extension flaps 42, 44 are rotated relative to the second side plates 26, 28 first, and the cover plates 32, 34 are rotated accordingly, transitioning to a state in which the cover plates 32, 34 are closed. When the cover plates 32, 34 are closed, the cover plate 32 overlaps the cover plate 34, and the insertion pieces 32a, 32b are inserted into the openings 26a, 28a, preventing the cover plates 32, 34 from being opened unintentionally.

When the cover plates 32 and 34 are open, the cover plate 32 is disposed on the same flat plate as the first side plate 22, and the cover plate 34 is disposed on the same flat plate as the first side plate 24. Similarly, the extension flap 42 is disposed on the same flat plate as the second side plate 26, and the extension flap 44 is disposed on the same flat plate as the second side plate 28. The cover plate 32 is disposed with a gap between each of the extension flaps 42 and 44. The gaps between the cover plate 32 and each of the extension flaps 42 and 44 widen upward. Similarly, the cover plate 34 is disposed with a gap between each of the extension flaps 42 and 44, and the gaps widen upward.

(Configuration of adhesive piece 50)
The first side plate 22 is fixed to each of the second side plates 26 and 28 via an adhesive piece 50. Similarly, the first side plate 24 is fixed to each of the second side plates 26 and 28 via an adhesive piece 50. The packaging container 10 has an adhesive piece 50 disposed at each of the four corners. The four adhesive pieces 50 have the same shape. Here, as shown in FIG. 5, the adhesive piece 50 connected to the first side plate 22 and extending toward the second side plate 28 will be described. The adhesive piece 50 protrudes from the edge of the first side plate 22 on the second side plate 28 side along the inner surface of the second side plate 28. As shown by the parallel hatched area, the adhesive piece 50 is adhered to the inner surface of the second side plate 28. In the vertical direction, the adhesive piece 50 is disposed over the entire length of the first side plate 22. As a result, the adhesive piece 50 is disposed over the entire length of the corner of the packaging container 10 in the vertical direction when the cover plates 32, 34 are closed.

The adhesive piece 50 is also connected to the edge of the cover plate 32 on the extension flap 44 side, straddling the boundary between the first side plate 22 and the cover plate 32. The adhesive piece 50 protrudes from the cover plate 32, beyond the gap between the cover plate 32 and the extension flap 44, along the inner surface of the extension flap 44. The adhesive piece 50 is arranged straddling the fold line at the boundary between the second side plate 28 and the extension flap 44. As shown by the parallel hatched area, the adhesive piece 50 is adhered to the inner surface of the extension flap 44. The adhesive piece 50 is adhered to the extension flap 44 in the entire area overlapping with the extension flap 44. The vertical length of the portion of the adhesive piece 50 above the fold line at the boundary between the second side plate 28 and the extension flap 44 is longer than the vertical length of the second side plate 28.

Two fold lines 50b, 50c are arranged on the adhesive piece 50. The fold line 50c overlaps with the fold line at the boundary between the second side panel 28 and the extension flap 44. The fold line 50b extends parallel to the edge of the extension flap 44 from the end of the fold line 50c on the first side panel 22 side. In other words, the fold line 50b is inclined upward so as to move away from the cover plate 32.

As shown in FIG. 6, when the cover plates 32, 34 are to be moved from an open state to a closed state, the extension flaps 42, 44 are bent relative to the second side plates 26, 28. When the extension flaps 42, 44 are bent relative to the second side plates 26, 28, the adhesive strips 50 are bent along the fold lines 50b, 50c. When the extension flaps 42, 44 are further bent relative to the second side plates 26, 28, the cover plates 32, 34 are pulled by the adhesive strips 50. As a result, the cover plates 32, 34 are pulled in the closing direction, causing the cover plates 32, 34 to collapse. This configuration makes it easier to move the cover plates 32, 34 from an open state to a closed state.

When the cover plates 32, 34 are closed, the adhesive strip 50 is folded at the fold line 50b, sandwiching the extension flaps 42, 44. The cover plates 32, 34 overlap the extension flaps 42, 44 above them.

As shown in FIG. 7, multiple packaging containers 10 can be stacked and stored with the cover plates 32, 34 open. When the cover plates 32, 34 are open, the first side plates 22, 24, the second side plates 26, 28, the cover plates 32, 34, and the extension flaps 42, 44 of the packaging container 10 are inclined so that the opening widens upward, making it easy to stack the packaging containers 10.

When multiple packaging containers 10 are stacked, a force is applied in the direction in which the first side plates 22, 24 and the second side plates 26, 28 move apart so that the opening defined by the first side plates 22, 24 and the second side plates 26, 28 widens. This makes it easier for stress to concentrate at the corners of the packaging container 10 placed underneath. In the packaging container 10, the adhesive pieces 50 placed at the corners are not only placed between the first side plates 22, 24 and the second side plates 26, 28, but also between the cover plates 32, 34 and the extension flaps 42, 44. With this configuration, the corners can be lengthened when the cover plates 32, 34 are open. This can ease the stress concentration at the corners and prevent the corners from breaking.

In the vertical direction, the extension flaps 42, 44 are longer than the second side panels 26, 28. The vertical length of the portion of the adhesive piece 50 above the fold line at the boundary between the second side panel 28 and the extension flap 44 is longer than the vertical length of the second side panel 28. With this configuration, the adhesive piece 50 can be made larger in the vertical direction. By increasing the dimensions of the adhesive piece 50, the load on the adhesive piece 50 can be distributed and stress concentration can be reduced in a situation where the packaging containers 10 are stacked with the cover panels 32, 34 open.

The above describes the embodiments of the present invention in detail, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and variations of the specific examples given above.

For example, the first side panels 22, 24 and the second side panels 26, 28 may be bent perpendicular to the bottom panel 12. In this case, when the cover panels 32, 34 are open, the cover panels 32, 34 and the extension flaps 42, 44 may be disposed perpendicular to the bottom panel 12, or may be disposed at an angle to the vertical direction of the bottom panel 12.

The cover plates 32, 34 do not have to completely close the opening of the packaging container 10. The cover plates 32, 34 may be longer than or shorter than the extension flaps 42, 44 in the vertical direction. The cover plates 32, 34 may be longer than the first side plates 22, 24 in the vertical direction. The cover plates 32, 34 only need to overlap the upper side of the extension flaps 42, 44 when closed.

One of the lid plates 32, 34 may not be placed. In this case, one lid plate may close the opening of the packaging container 10. In this case, the adhesive piece 50 may be fixed from the one lid plate and the first side plate 26 or the first side plate 28 to which the lid plate is connected, to at least one of the second side plates 26, 28, the second side plate, and the extension flap connected to the second side plate.

The adhesive pieces 50 do not have to be placed at each corner of the packaging container 10. In general, the fixing pieces may be placed at at least some of the corners of the packaging container. For example, if the shape of the packaging container is different from that of the packaging container 10 and multiple packaging containers are stacked and force is applied to only some of the corners of the packaging container, the fixing pieces may be placed only at those corners.

The technical elements described in this specification or drawings have technical utility either alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. The technologies illustrated in this specification or drawings achieve multiple objectives simultaneously, and achieving any one of those objectives is itself technically useful.

10: Packaging container 12: Bottom plate 22: First side plate 24: First side plate 26: Second side plate 28: Second side plate 32: Lid plate 34: Lid plate 42: Extension flap 44: Extension flap 50: Adhesive piece 50b: Folding Curve 50c: folding curve

Claims (4)

A pair of first side plates facing each other;
a pair of second side plates opposed to each other between the pair of first side plates;
a bottom plate connected to each of the pair of first side plates and the pair of second side plates;
a lid portion connected to at least one of the pair of first side plates and facing the bottom plate with a gap therebetween in a closed state;
a pair of extension flaps connected to the pair of second side panels, respectively, and overlapping the lid portion when the lid portion is in a closed state;
a fixing piece extending from the at least one first side plate on which the lid portion is arranged and the lid portion to at least one second side plate of the pair of second side plates and the extension flap connected to the second side plate, and fixed to the second side plate and the extension flap connected to the second side plate;
Each fixed piece is
The support member is disposed at a corner between the first side plate and the second side plate,
The extension flap extends from the second side panel to the extension flap across a boundary between the second side panel and the extension flap,
The cover has a first fold line along a boundary between the second side panel and the extension flap, and a second fold line that folds while sandwiching the extension flap to which the fixing piece is fixed when the cover is closed,
a gap is provided between the extension flap and the lid portion when the pair of extension flaps are disposed on the extension of the pair of second side plates, respectively, and the lid portion is disposed on the extension of the first side plate;
the fixing piece passes through the gap between the extension flap and the lid portion and extends from the lid portion to the extension flap,
A packaging container , wherein the second fold line is disposed at the boundary between a portion located in the gap between the extension flap and the lid portion and a portion overlapped by the extension flap. A pair of first side plates facing each other;
a pair of second side plates opposed to each other between the pair of first side plates;
a bottom plate connected to each of the pair of first side plates and the pair of second side plates;
a lid portion connected to at least one of the pair of first side plates and facing the bottom plate with a gap therebetween in a closed state;
a pair of extension flaps connected to the pair of second side panels, respectively, and overlapping the lid portion when the lid portion is in a closed state;
a fixing piece extending from the at least one first side plate on which the lid portion is arranged and the lid portion to at least one second side plate of the pair of second side plates and the extension flap connected to the second side plate, and fixed to the second side plate and the extension flap connected to the second side plate;
Each fixed piece is
The support member is disposed at a corner between the first side plate and the second side plate,
The extension flap extends from the second side panel to the extension flap across a boundary between the second side panel and the extension flap,
The cover has a first fold line along a boundary between the second side panel and the extension flap, and a second fold line that folds while sandwiching the extension flap to which the fixing piece is fixed when the cover is closed,
the cover portion includes a pair of cover plates connected to the pair of first side plates,
The fixing piece extends from the first side plate and the cover plate connected to the first side plate, for each of the pair of first side plates, to the second side plate and the extension flap connected to the second side plate, and is fixed to the second side plate and the extension flap connected to the second side plate. The packaging container according to claim 1 or 2, wherein the pair of first side panels and the pair of second side panels are inclined so that an opening defined by the pair of first side panels and the pair of second side panels widens upward. In a state where the extension flap and the second side plate are disposed on the same plane, in the up-down direction,
The extension flap is longer than the second side panel,
The packaging container according to claim 1 , wherein the fixing piece above the boundary between the second side plate and the extension flap is longer than the second side plate.

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