Packing box

Abstract

To realize a packaging box that is resistant to deformation.SOLUTION: A packaging box (100) includes a first side wall (1) and a second side wall (2) facing each other, and a third side wall (3) to which a top plate (11) serving as a lid is connected, and the top plate fits between the first side wall and the second side wall, and side ends of the top plate are in contact with an inner surface of the first side wall and an inner surface of the second side wall.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses a packaging box having an octagonal body. The packaging box has four wall panels and four inclined walls that constitute the octagonal body. The inclined walls are inclined relative to the wall panels.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of Invention

Problems to be Solved by the Invention

[0004] Conventional packaging boxes have a problem that they are easily deformed by a clamping force applied from the lateral direction. This problem exists even when the body has a quadrangular shape, and becomes more prominent when the body has inclined walls.

[0005] One aspect of the present invention aims to realize a packaging box that is less prone to deformation.

Means for Solving the Problems

[0006] To solve the above problem, a packaging box according to one aspect of the present invention includes a first side wall and a second side wall that face each other, and a third side wall to which a top plate serving as a lid is connected. The top plate fits between the first side wall and the second side wall, and a side end of the top plate is in contact with the inner side surface of the first side wall and the inner side surface of the second side wall.

Effects of the Invention

[0007] According to one aspect of the present invention, a packaging box that is less prone to deformation can be realized.

Brief Description of the Drawings

[0008] [Figure 1] This is a net diagram of a packaging box according to one embodiment of the present invention. [Figure 2] This is a schematic perspective view showing the configuration of the above packaging box. [Figure 3] This is a plan view showing the configuration of the above packaging box. [Figure 4] This is a cross-sectional view along the AA cutting line in Figure 3, showing the configuration of the above-mentioned packaging box. [Modes for carrying out the invention]

[0009] Figure 1 is an unfolded view of the packaging box 100 of this embodiment. Figure 2 is a schematic perspective view showing the configuration of the packaging box 100 of this embodiment. In Figure 1, the dashed line indicates a 90° fold (mountain fold), and the dotted line indicates a 45° fold (mountain fold with a 45° bend). The packaging box 100 is a packaging box for individually packaging and storing, for example, cylindrical articles. The blank of the packaging box 100 shown in Figure 1 is formed from a single sheet of corrugated cardboard or thick paper. The assembled packaging box 100 shown in Figure 2 has the shape of an octagonal prism.

[0010] (Side components) The packaging box 100 comprises a first side wall 1, a second side wall 2, a third side wall 3, a fourth side wall 4, a fifth side wall 5, a sixth side wall 6, a seventh side wall 7, an eighth side wall 8, and an adhesive section 9. The adhesive section 9 is provided adjacent to the fourth side wall 4. The adhesive section 9 is attached to the eighth side wall 8.

[0011] The assembled packaging box 100 is described below. The first to eighth side walls 8 form the sides of an octagonal prism. The widths of the first side wall 1, second side wall 2, third side wall 3, and fourth side wall 4 are wider than the widths of the fifth side wall 5, sixth side wall 6, seventh side wall 7, and eighth side wall 8. The height from the bottom of the first side wall 1, second side wall 2, third side wall 3, and fourth side wall 4 is higher than the height from the bottom of the fifth side wall 5, sixth side wall 6, seventh side wall 7, and eighth side wall 8. Note that for the fifth side wall 5 and eighth side wall 8, the height is considered to be from the bottom to the upper fold. The first side wall 1 and the second side wall 2 face each other. The third side wall 3 and the fourth side wall 4 face each other. The fifth side wall 5 is arranged between the first side wall 1 and the fourth side wall 4. The sixth side wall 6 is arranged between the first side wall 1 and the third side wall 3. The seventh side wall 7 is arranged between the second side wall 2 and the third side wall 3. The eighth side wall 8 is arranged between the second side wall 2 and the fourth side wall 4. In the first to eighth side walls 1 to 8, each internal angle between adjacent walls is an obtuse angle (about 135°).

[0012] (Configuration of bottom surface) The packaging box 100 includes a first bottom flap 21, a second bottom flap 22, a third bottom flap 23, and a fourth bottom flap 24. The second bottom flap 22 is connected to the lower side of the first side wall 1. The third bottom flap 23 is connected to the lower side of the third side wall 3. The fourth bottom flap 24 is connected to the lower side of the second side wall 2. The first bottom flap 21 is connected to the lower side of the fourth side wall 4. The first to fourth bottom flaps 21 to 24 constitute the bottom surface of an octagonal prism.

[0013] (Configuration of top surface) The packaging box 100 includes a top plate 11, a first upper flap 12, a second upper flap 13, a first insertion plate 14, a second insertion plate 15, and a third insertion plate 16. The top plate 11 is connected to the upper side of the third side wall 3. The first upper flap 12 is connected to the upper side of the fifth side wall 5. The second upper flap 13 is connected to the upper side of the eighth side wall 8.

[0014] The top plate 11 serves as the lid of the packaging box 100. The top plate 11 has a substantially octagonal shape to constitute the top surface of the octagonal prism. The top plate 11 has protrusions 11a on four sides corresponding to the fifth to eighth side walls 5 to 8. A first insertion plate 14 is connected to the distal end of the top plate 11 (the end on the side opposite to the third side wall 3). A second insertion plate 15 is connected to the end of the top plate 11 on the first side wall 1 side. A third insertion plate 16 is connected to the end of the top plate 11 on the second side wall 2 side.

[0015] FIG. 3 is a plan view showing the configuration of the packaging box 100 of the present embodiment. FIG. 4 is a cross-sectional view taken along the A-A cutting line in FIG. 3. In FIG. 3, members hidden directly below the top plate 11 are indicated by dotted lines. The assembled packaging box 100 will be described below.

[0016] The top plate 11 fits between the first side wall 1 and the second side wall 2 that face each other. Both side ends of the top plate 11 to which the second insertion plate 15 and the third insertion plate 16 are connected are in contact with the inner side surfaces of the first side wall 1 and the second side wall 2, respectively. The distal end of the top plate 11 to which the first insertion plate 14 is connected is in contact with the inner side surface of the fourth side wall 4. The second insertion plate 15 is inserted into the inner side of the packaging box 100 along the inner side surface of the first side wall 1. The third insertion plate 16 is inserted into the inner side of the packaging box 100 along the inner side surface of the second side wall 2.

[0017] The first upper flap 12 and the second upper flap 13 are folded to the inner side of the packaging box 100. The top plate 11 covers over the first upper flap 12 and the second upper flap 13. The top plate 11 is positioned at the outermost side, and the entirety thereof is exposed to the outside. The four protruding portions 11a of the top plate 11 cover over the fifth side wall 5, the sixth side wall 6, the seventh side wall 7, and the eighth side wall 8, respectively. The protruding portions 11a function as stoppers that regulate the movable range of the top plate 11 so that the top plate 11 does not enter too far into the interior of the packaging box 100.

[0018] The first upper flap 12 has a side surface that extends along the inner surface of the fourth side wall 4. The angle θ between the boundary (fold) between the fifth side wall 5 and the first upper flap 12 in the unfolded view (Figure 1) and the side surface of the first upper flap 12 is approximately the same as the interior angle (135°) between the fourth side wall 4 and the fifth side wall 5. The gap between the side surface of the first upper flap 12 and the inner surface of the fourth side wall 4 is a width corresponding to the thickness of the first insertion plate 14 (a width that allows the first insertion plate 14 to be inserted inward along the inner surface of the fourth side wall 4). The first insertion plate 14 is inserted between the fourth side wall 4 and the first upper flap 12 along the inner surface of the fourth side wall 4. When the lid (top plate 11) is opened, the first insertion plate 14 comes into contact with the side surface of the first upper flap 12. This friction prevents the first insertion plate 14 from coming out unintentionally, that is, prevents the lid from opening unintentionally.

[0019] Generally, when an obtuse-angled inclined side wall (inclined wall) is present between the side walls that make up a rectangular prism, the packaging box becomes more susceptible to deformation due to lateral pressure. This is because it is difficult to fix the corner between the inclined wall and the adjacent side wall.

[0020] In the packaging box 100 of this embodiment, a top plate 11 is sandwiched between the first side wall 1 and the second side wall 2. The upper ends of the first side wall 1 and the second side wall 2 are at the same level as or higher than the upper surface of the top plate 11. Therefore, the top plate 11 supports the space between the first side wall 1 and the second side wall 2. As a result, the packaging box 100 is resistant to deformation from forces that sandwich the first side wall 1 and the second side wall 2 from the side. The packaging box 100 can adequately protect the contents inside.

[0021] The top plate 11 is connected to the third side wall 3, and is also folded at the three sides to which the first insertion plates 14 to the third insertion plates 16 are connected. Therefore, the top plate 11 itself is less likely to deform from its planar shape, and consequently, the packaging box 100 is less likely to deform.

[0022] For example, in conventional rectangular prism-shaped packaging boxes, it was not possible to provide insert plates on all three sides of the rectangular lid because it was necessary to restrict the range of motion of the lid.

[0023] In the packaging box 100 of this embodiment, the first upper flap 12 and the second upper flap 13, or the protrusion 11a, connected to the fifth side wall 5 and the eighth side wall 8, restrict the range of motion of the top plate 11. Therefore, the first insertion plates 14 to the third insertion plates 16 can be provided on three sides of the top plate 11. As a result, the packaging box 100 has a structure that is resistant to deformation.

[0024] [Differentiation] The widths of the first side wall 1, the second side wall 2, the third side wall 3, and the fourth side wall 4 may be the same as, or narrower than, the widths of the fifth side wall 5, the sixth side wall 6, the seventh side wall 7, and the eighth side wall 8.

[0025] The second upper flap 13, like the first upper flap 12, may also have a side surface that extends along the inner surface of the fourth side wall 4.

[0026] Furthermore, although the case in which the second upper flap 13 is provided on the eighth side wall 8 has been described, an upper flap that has the same effect as the second upper flap 13 may be provided on both or one of the sixth side wall 6 and the seventh side wall 7. By providing the upper flap adjacent to the first insertion plates 14 to the third insertion plates 16 of the top plate, the range of motion of the top plate is further restricted, making the packaging box a structure that is even less prone to deformation.

[0027] The second insertion plate 15 and / or the third insertion plate 16 may be omitted. Alternatively, the first insertion plate 14 may be omitted.

[0028] The top plate 11 may have one or more protrusions 11a. The height of the side wall corresponding to the location of the fifth side wall 5 to the eighth side wall 8 where there are no protrusions 11a may be the same as the height of the first side wall 1 to the fourth side wall 4. Furthermore, the protrusions 11a may be absent entirely.

[0029] Furthermore, the case was described in which, when each insertion plate 14-16 of the top plate 11 is inserted into the inside of the packaging box 100 along the inner surfaces of each side wall 4, 1, 2, a gap is provided between each protrusion 11a and the side walls on both sides of each protrusion 11a. However, it is not necessary to provide a gap between each protrusion 11a and the side walls on both sides. This further restricts the range of motion of the top plate, thereby improving the resistance of the packaging box to deformation.

[0030] The height of the upper end of the fourth side wall 4 may be lower than the upper surface of the top plate 11. However, by making the height of the upper end of the fourth side wall 4 the same as or higher than the upper surface of the top plate 11, the fourth side wall 4 and the third side wall 3 become less susceptible to deformation from forces that clamp them from the side.

[0031] The top plate 11 may be connected to, for example, the sixth side wall 6 instead of the third side wall 3. In this case, the height of the upper ends of the third side wall and the fourth side wall 4 may be the same as or higher than the upper surface of the top plate 11. In this case, the top plate 11 fits between the third side wall 3 and the fourth side wall 4, and between the first side wall 1 and the second side wall 2.

[0032] In the above embodiment, a packaging box 100 in the shape of an octagonal prism was described, but the packaging box may also be in the shape of a rectangular prism without the fifth side wall 5 to the eighth side wall 8. Alternatively, the packaging box may be in the shape of a pentagonal to heptagonal prism with at least one of the fifth side wall 5 to the eighth side wall 8 present.

[0033] By designing packaging boxes in shapes such as pentagonal or octagonal prisms, the area of ​​material (blank space) required for packaging cylindrical items can be reduced. This contributes to achieving the Sustainable Development Goals (SDGs).

[0034] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of Symbols]

[0035] 1. First side wall 2. Second side wall 3. Third side wall 4. Fourth side wall 5. Fifth side wall 6. Sixth side wall 7. Seventh side wall 8. Eighth side wall 11 Top plate 11a Projection 12. First upper flap 13. Second upper flap 14. First insertion plate 15. Second insertion plate 16. Third insertion plate 21. First bottom flap 22. Second bottom flap 23. Third bottom flap 24. Fourth bottom flap 100 packaging boxes

Claims

[Claim 1] It is a packaging box, The first side wall and the second side wall are opposite to each other, The third side wall to which the top plate that serves as the lid is attached, A fourth side wall opposite the third side wall, The structure comprises a fifth side wall positioned between the first side wall and the third side wall or between the first side wall and the fourth side wall, the fifth side wall having an obtuse angle between itself and the first side wall, The top plate is fitted between the first side wall and the second side wall, The side edge of the top plate is in contact with the inner surface of the first side wall and the inner surface of the second side wall. The heights of the first and second side walls are greater than the height of the fifth side wall. A packaging box in which the top plate has a stopper that covers the fifth side wall.

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