Packing box

Abstract

We provide easy-to-carry packaging boxes. [Solution] The packaging box comprises a body 10 formed by a bottom plate 11, left and right side walls 12, 12, and a top plate 14, with front and rear end walls 20 provided at the front and rear openings of the body 10. The end walls 20 have an upper flap 21 connected to the top plate 14, a lower flap 22 connected to the bottom plate 11, and left and right side flaps 23, 23 connected to the side walls 12, 12, respectively. At the corner between the top plate 14 and the upper flap 21, an inclined portion 30 is formed in the middle portion in the left-right direction. The inclined portion 30 is inclined with respect to the top plate 14 and the upper flap 21 such that the upper edge is positioned inward from the lower edge.

Description

Technical Field

[0001] The present invention relates to a packaging box.

Background Art

[0002] As a cardboard packaging box for accommodating beverage cans and plastic bottles, there is a wrap-around type packaging box in which a cylindrical body is formed by a bottom plate, left and right side walls, and a top plate, and end walls are provided at the front and rear openings of the body respectively (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the front and rear parts of the above-mentioned conventional packaging box are respectively lifted by hand, the arm hits strongly against the corner between the top plate and the end wall, so it is difficult to carry the packaging box.

[0005] An object of the present invention is to solve the above-mentioned problems and provide a packaging box that is easy to carry.

Means for Solving the Problems

[0006] To solve the aforementioned problems, the present invention provides a packaging box comprising a body formed by a bottom plate, left and right side walls connected to the bottom plate, and a top plate connected to the upper edges of the side walls, with front and rear end walls provided at the front and rear openings of the body. The end walls have an upper flap connected to the top plate, a lower flap connected to the bottom plate, and left and right side flaps connected to the side walls, respectively, and overlapping the upper and lower flaps. At the corner between the top plate and the upper flap, an inclined portion is formed in the middle portion in the left-right direction. The inclined portion is inclined with respect to the top plate and the upper flap such that the upper edge is positioned inward from the lower edge.

[0007] In the packaging box of the present invention, an inclined portion is formed at the corner between the top plate and the end wall. As a result of this inclined portion, when the packaging boxes are stacked during distribution or storage, the top plate of the lower packaging box is positioned inward from the bottom plate of the upper packaging box, making it easier to lift the upper packaging box by placing your fingers on the underside of the bottom plate. Furthermore, when lifting a packaging box, it is natural to position the box so that its longitudinal side faces the body and to place one's hands on the shorter side of the box. Therefore, in this invention, if an end wall is positioned along the shorter side of the packaging box and an inclined portion is provided on the end wall side, the ease of lifting the packaging box is improved. Furthermore, when lifting the packaging box by placing your hands on the front and back, positioning your arms to the sides of the sloping sections prevents your arms from hitting the corners between the top plate and the end walls, making the packaging box easier to carry.

[0008] In the packaging box of the present invention, product information can be printed on the slanted surface. This makes it easier for customers to see the product information from an oblique angle above when the packaging boxes are stacked and arranged on a sales floor with the end walls facing forward, thereby effectively promoting the products contained inside the packaging box.

[0009] In the packaging box of the present invention, when other boxes are stacked on top of the top plate, a vertically downward load is less likely to act on the inclined portion of the end wall, thus suppressing bulging of the end wall.

[0010] In the aforementioned packaging box, it is preferable that the top plate and the side wall are connected via an inclined wall, and that the inclined wall has its upper edge positioned inward from its lower edge and is inclined with respect to the side wall and the top plate. In this configuration, when other box-shaped structures are stacked on top of the top plate, a vertically downward load is less likely to act on the upper edge of the side wall, thus suppressing bulging of the side wall. Box bulging refers to the phenomenon where, when stacking boxes, the load from above causes the side walls of the lower boxes to bulge outwards and deform. This bulging is particularly noticeable on the side walls along the length of the box. Box bulging not only impairs the strength of the box but also detracts from its appearance, especially when displayed and sold in stores, which can reduce the likelihood of purchase. By providing an inclined wall between the top plate and the side wall, the side wall slides horizontally outwards while remaining flat under load, rather than bulging outwards. This minimizes the noticeable change in the side wall and maintains a good appearance for the box.

[0011] In the packaging box with the above configuration, the length of the top plate in the left-right direction is shorter and the height of the side walls is lower compared to a rectangular packaging box in which the top plate and side walls are connected at right angles. Therefore, the area of ​​the blank sheet used to form the packaging box can be reduced, thereby lowering manufacturing costs.

[0012] In the aforementioned packaging box, it is preferable that the side flaps overlap the inner surfaces of the upper flap and the lower flap, and that the inclined portion is formed at the corner between the top plate and the upper flap, in the area between the side flaps. In this configuration, an inclined section can be provided even when the end wall has left and right side flaps. This makes it possible to provide an inclined section on the end wall side of a wrap-around type packaging box where the end wall is formed by top, bottom, left, and right flaps. Furthermore, in the above configuration, since the side flaps do not interfere with the inclined portion, the upper edges of the side flaps can be brought into contact with the lower surface of the top plate, and the lower edges of the side flaps can be brought into contact with the upper surface of the bottom plate, allowing the top plate and bottom plate to be supported by the side flaps.

[0013] In the aforementioned packaging box, the top plate and the upper flap are connected via a fold line. Preferably, the upper edge of the inclined portion is connected to the top plate via a first fold line, inward from the fold line, the lower edge of the inclined portion is connected to the upper flap via a second fold line, below the fold line, and the left and right side edges of the inclined portion are separated from the top plate and the upper flap. In this configuration, when assembling the packaging box, folding the top flap downwards relative to the top plate automatically creates a beveled edge at the corner between the top plate and the top flap. [Effects of the Invention]

[0014] In this invention, by forming an inclined portion at the corner between the top plate and the end wall of the packaging box, the arm will not come into strong contact with the corner when lifting the packaging box, making it easier to carry. Furthermore, in the packaging box of this invention, product information can be printed on the inclined portion to effectively promote the products contained inside. In addition, the packaging box of this invention can suppress bulging of the end wall. [Brief explanation of the drawing]

[0015] [Figure 1] This is a perspective view of a packaging box according to an embodiment of the present invention, viewed from the front left upper section. [Figure 2] This is a perspective view of a packaging box according to an embodiment of the present invention, viewed from the rear upper right. [Figure 3] This figure shows a blank sheet of a packaging box according to an embodiment of the present invention. [Modes for carrying out the invention]

[0016] Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, the front-back, left-right directions are set for convenience in explaining the packaging box of the present embodiment, and do not limit the structure or usage state of the packaging box.

[0017] As shown in FIGS. 1 and 2, the packaging box 1 of the present embodiment is a wraparound cardboard box including a rectangular tube-shaped body portion 10 and front and rear end walls 20, 20 provided at the front and rear openings of the body portion 10, respectively. The contents accommodated in the packaging box 1 of the present embodiment are not limited, and for example, a plurality of beverage cans or plastic bottles can be arranged side by side in the front-back, left-right directions and accommodated.

[0018] As shown in FIG. 3, the packaging box 1 of the present embodiment is formed by mountain folding or valley folding a blank sheet S obtained by cutting out a cardboard sheet at each fold line. The blank sheet S shown in FIG. 3 is arranged so that the inner surface side is visible. The fold lines of the blank sheet S are ruled lines (pressed ruled lines) formed by linearly pressing the surface of the blank sheet S. Note that intermittent cuts may be formed in the ruled lines. By doing so, it becomes easier to bend the blank sheet S at the fold lines. Alternatively, the fold lines may be formed by intermittently forming linear half-cut cuts that only cut the surface of the sheet or cuts that penetrate the sheet.

[0019] As shown in FIGS. 1 and 2, the body portion 10 is formed in a tubular shape by a bottom plate 11, a pair of left and right side walls 12, 12, a pair of left and right inclined walls 13, 13, and a top plate 14. In the packaging box 1 of the present embodiment, the length of the body portion 10 in the front-back direction is formed to be larger than the length in the left-right direction. That is, in the present embodiment, the longitudinal direction of the packaging box 1 is the front-back direction, and the short-side direction is the left-right direction.

[0020] The base plate 11 is a rectangular flat plate (see Figure 3). The left side wall 12 is connected to the left edge of the base plate 11 via a folded line, and the right side wall 12 is connected to the right edge of the base plate 11 via a folded line. The left and right side walls 12, 12 are identical rectangular walls and are formed perpendicular to the base plate 11.

[0021] The left inclined wall 13 is connected to the upper edge of the left side wall 12 via a broken line. Similarly, the right inclined wall 13 is connected to the upper edge of the right side wall 12 via a broken line. The inclined wall 13 extends in a band shape along the upper edge of the side wall 12. Furthermore, the inclined wall 13 is inclined with respect to the side wall 12 such that its upper edge is positioned inward (towards the center in the left-right direction) than its lower edge.

[0022] The left edge of the top plate 14 is connected to the upper edge of the left-side inclined wall 13 via a broken line. The top plate 14 is a rectangular flat plate and is positioned parallel to the bottom plate 11. A series of connecting pieces 15 are installed along the upper edge of the right-side inclined wall 13. The connecting pieces 15 extend in a strip-like manner along the upper edge of the right-side inclined wall 13. The connecting pieces 15 are attached to the lower surface of the top plate 14 with adhesive. In the packaging box 1 of this embodiment, the top plate 14 and the side walls 12 are connected via an inclined wall 13.

[0023] As shown in Figure 1, the front end wall 20 includes an upper flap 21 connected to the front edge of the top plate 14, a lower flap 22 connected to the front edge of the bottom plate 11, and left and right side flaps 23, 23 connected to the front edges of the left and right side walls 12, 12, respectively.

[0024] The side flaps 23 are connected to the leading edge of the side wall 12 via a fold line. The side flaps 23 extend in a band shape along the leading edge of the side wall 12. The upper ends of the side flaps 23 protrude above the upper ends of the leading edge of the side wall 12. The side flaps 23 are folded perpendicularly inward (towards the center in the left-right direction) relative to the side wall 12. In this embodiment, the vertical length of the side flap 23 is set such that the upper edge of the side flap 23 abuts against the lower surface of the top plate 14, and the lower edge of the side flap 23 abuts against the upper surface of the bottom plate 11.

[0025] The upper flap 21 is connected to the front edge of the top plate 14 via a fold line L1. The upper flap 21 extends in a strip shape along the front edge of the top plate 14. The upper flap 21 is folded perpendicularly downward with respect to the top plate 14. The lower flap 22 is connected to the front edge of the base plate 11 via a fold line. The lower flap 22 extends in a strip shape along the front edge of the base plate 11. The lower flap 22 is folded perpendicularly upward with respect to the base plate 11.

[0026] The upper flap 21 is superimposed on the upper part of the outer surfaces of the left and right side flaps 23, 23, and the lower flap 22 is superimposed on the lower part of the outer surfaces of the left and right side flaps 23, 23. The inner surfaces of the upper flap 21 and the lower flap 22 are joined to the outer surfaces of the left and right side flaps 23, 23 by adhesive.

[0027] The left and right side flaps 23, 23 are spaced apart in the left-right direction, and the upper flap 21 and lower flap 22 are spaced apart in the up-down direction. Therefore, an opening is formed in the central part of the end wall 20 of this embodiment.

[0028] The rear end wall 20 is formed symmetrically to the front end wall 20. As shown in Figure 2, the rear end wall 20 includes an upper flap 21 connected to the rear edge of the top plate 14, a lower flap 22 connected to the rear edge of the bottom plate 11, and left and right side flaps 23, 23 connected to the front edges of the left and right side walls 12, 12, respectively.

[0029] In the packaging box 1 of this embodiment, as shown in Figures 1 and 2, an inclined portion 30 is formed in the middle of the left-right direction at the corner between the top plate 14 and the upper flap 21. The inclined portion 30 is formed at the corner between the top plate 14 and the upper flap 21, in the area between the left and right side flaps 23, 23. In other words, the inclined portion 30 is positioned so as not to interfere with the left and right side flaps 23, 23.

[0030] The inclined portion 30 is a rectangular part that is inclined with respect to the upper flap 21 and the top plate 14 such that its upper edge is positioned inward (towards the center in the front-to-back direction) than its lower edge. The outer surface of the inclined portion 30 has an inclined surface that is inclined with respect to the outer surface of the upper flap 21 and the upper surface of the top plate 14.

[0031] The upper edge of the inclined portion 30 is connected to the top plate 14 via a first fold line L11, on the inside (towards the center in the front-to-back direction) of the fold line L1 between the top plate 14 and the upper flap 21. The first fold line L11 is parallel to the fold line L1 between the top plate 14 and the upper flap 21. The lower edge of the inclined portion 30 is below the fold line L1 between the top plate 14 and the upper flap 21, and is connected to the upper flap 21 via a second fold line L12. The second fold line L12 is parallel to the fold line L1 between the top plate 14 and the upper flap 21.

[0032] The upper part of the inclined section 30 is recessed into the top plate 14, and the lower part of the inclined section 30 is recessed into the upper flap 21. Straight slits are cut into the left and right side edges of the inclined section 30. As a result, the left and right side edges of the inclined section 30 are separated from the top plate 14 and the upper flap 21.

[0033] When assembling the end wall 20 of the packaging box 1, the upper flap 21 is folded downward relative to the top plate 14, starting from a blank sheet S (see Figure 3) where the upper flap 21 is flat and continuous with the top plate 14. At this time, as the upper flap 21 is folded relative to the top plate 14, the slits on the left and right side edges of the inclined portion 30 open, and the left and right side edges of the inclined portion 30 are separated from the top plate 14 and the upper flap 21. Furthermore, at the first bend line L11, the inclined portion 30 bends downward relative to the top plate 14, and at the second bend line L12, the inclined portion 30 bends inward relative to the upper flap 21. As a result, the inclined portion 30 is automatically formed at the corner between the top plate 14 and the upper flap 21 (end wall 20).

[0034] When lifting the packaging box 1 as described above, it is natural to position the left and right sides of the packaging box 1 in the longitudinal direction in front of the body and place your hands on the front and rear parts of the packaging box 1 in the short direction (left and right direction). As a result, when lifting the packaging box 1 of this embodiment, you will place your hands on the front and rear of the packaging box 1, and your arms will be positioned to the side of the inclined section 30, so your arms will not come into strong contact with the corner between the top plate 14 and the end wall 20. Therefore, the packaging box 1 of this embodiment is easy to carry. Furthermore, even when lifting the packaging box 1 of this embodiment by placing one hand on the left or right side, the arms are positioned to the side of the inclined wall 13, so the arms do not strongly contact the corner between the top plate 14 and the side wall 12.

[0035] Furthermore, in the packaging box 1 of this embodiment, by providing an inclined portion 30 and an inclined wall 13 on the outer edge of the top plate 14, when the packaging boxes 1 are stacked during distribution or storage, a portion is formed where the edge of the top plate 14 of the lower packaging box 1 is set inward from the edge of the bottom plate 11 of the upper packaging box 1. This makes it easier to lift the upper packaging box 1 by placing your fingers on the underside of the bottom plate 11.

[0036] In this embodiment, product information can be printed on the inclined section 30 and the inclined wall 13 of the packaging box 1. This makes it easier for customers to see the product information from an oblique angle above when the packaging boxes 1 are stacked and lined up on the sales floor, thus effectively promoting the products contained inside the packaging box 1.

[0037] In the packaging box 1 of this embodiment, when other boxes are stacked on the top plate 14, a vertically downward load is less likely to act on the inclined portion 30 of the end wall 20 and the inclined wall 13, thus suppressing bulging of the end wall 20 and the side wall 12. In the packaging box 1 of this embodiment, by providing an inclined wall 13 between the top plate 14 and the side wall 12, the side wall 12 slides horizontally outward while maintaining a flat state, rather than bulging outward under load from above. This makes the amount of change in the side wall 12, which is arranged in the longitudinal direction of the packaging box 1, less noticeable, thus maintaining a good appearance of the packaging box 1 and increasing the desire to purchase it when it is displayed and sold in stores.

[0038] In the packaging box 1 of this embodiment, compared to a rectangular parallelepiped packaging box in which the top plate 14 and side walls 12 are connected at right angles, the length of the top plate 14 in the left-right direction is shorter, and the height of the side walls 12 is lower. Therefore, the area of ​​the blank sheet S (see Figure 3) used to form the packaging box 1 can be reduced, thereby lowering manufacturing costs.

[0039] In the packaging box 1 of this embodiment, the inclined portion 30 is formed in the area between the side flaps 23, 23, and since the side flaps 23, 23 do not interfere with the inclined portion 30, the inclined portion 30 can be provided on the end wall 20 side of the wrap-around type packaging box 1. Furthermore, since the upper edge of the side flap 23 can be brought into contact with the lower surface of the top plate 14 and the lower edge of the side flap 23 can be brought into contact with the upper surface of the bottom plate 11, the top plate 14 and the bottom plate 11 can be supported by the side flaps 23, 23.

[0040] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from its spirit. In the packaging box 1 of this embodiment, as shown in Figures 1 and 2, the inner surfaces of the upper flap 21 and the lower flap 22 are joined to the outer surfaces of the side flaps 23, 23. However, the outer surfaces of the upper flap 21 and the lower flap 22 may be joined to the inner surfaces of the side flaps 23, 23.

[0041] In the packaging box 1 of this embodiment, the upper flap 21 and the lower flap 22 are spaced apart in the vertical direction, but the upper flap 21 and the lower flap 22 may be continuous. Also, in the packaging box 1 of this embodiment, the left and right side flaps 23, 23 are spaced apart in the horizontal direction, but the side flaps 23, 23 may be continuous.

[0042] In the packaging box 1 of this embodiment, the connecting piece 15, which is connected to the upper edge of the inclined wall 13, is joined to the lower surface of the top plate 14. However, the connecting piece 15 may also be joined to the upper surface of the top plate 14. Furthermore, the body portion 10 may be formed by connecting the connecting piece to the lower edge of the side wall 12 and joining the connecting piece to the upper or lower surface of the bottom plate 11.

[0043] Although the packaging box 1 in this embodiment is made of corrugated cardboard, the packaging box may also be formed from various known types of paperboard. [Explanation of Symbols]

[0044] 1 packaging box 10 Torso 11 Bottom plate 12 Side wall 13 Slanted wall 14 Top plate 15 Joint piece 20 End Wall 21 Top flap 22 Lower flap 23 Side flaps 30 Slope L1 is a broken line graph. L11 First broken line L12 Second broken line S Blank Sheet

Claims

1. The base plate and The left and right side walls connected to the aforementioned bottom plate, The body is formed by a top plate connected to the upper edges of the aforementioned side walls, Front and rear end walls are provided at the front and rear openings of the aforementioned body, The aforementioned end wall is An upper flap connected to the top plate, A lower flap connected to the aforementioned bottom plate, It has left and right side flaps that are connected to the aforementioned side walls and overlap the upper flap and the lower flap, At the corner between the top plate and the upper flap, an inclined portion is formed in the middle portion in the left-right direction. The packaging box is characterized in that the inclined portion is inclined with respect to the top plate and the upper flap such that the upper edge is positioned inward from the lower edge.

2. A packaging box according to claim 1, The top plate and the side wall are connected via an inclined wall. The packaging box is characterized in that the inclined wall is inclined with respect to the side wall and the top plate such that the upper edge is positioned inward from the lower edge.

3. A packaging box according to claim 1, The aforementioned side flaps are superimposed on the inner surfaces of the upper flap and the lower flap, The packaging box is characterized in that the inclined portion is formed at the corner between the top plate and the upper flap, in the area between the side flaps.

4. A packaging box according to claim 1, The top plate and the upper flap are connected via a fold line. The upper edge of the inclined portion is located inside the fold line and is connected to the top plate via the first fold line. The lower edge of the inclined portion is below the fold line and connected to the upper flap via a second fold line. A packaging box characterized in that the left and right side edges of the inclined portion are separated from the top plate and the upper flap.

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