JP6988338B2 - Self-supporting thin rectangular parallelepiped carton - Google Patents

Description

The present invention relates to a thin rectangular parallelepiped carton that is highly self-supporting, that is, can be stably self-supporting.

A thin rectangular parallelepiped carton having a rectangular bottom surface is easy to fall down, and it is considered to form a leg portion extending outward shortly in order to prevent the fallen shape (Patent Document 1). In the case described in Patent Document 1, a notch that enters the bottom plate portion is formed at the boundary between the front plate portion and the bottom plate portion of the carton, and this notch is used as the front leg portion. Since there is a hole in the bottom, it lacks protection of the contents.

Patent Document 2 discloses a rectangular bottom plate surface having a ruled line in a direction parallel to the short side. The bottom surface of a thin rectangular parallelepiped carton having a rectangular bottom surface tends to warp outward in an arc shape when viewed from the side, but the ruled line can improve the rigidity of the bottom plate surface against the warp. However, it is difficult to improve the rigidity enough to completely overcome the warp.

Japanese Unexamined Patent Publication No. 2006-1631 Japanese Unexamined Patent Publication No. 2001-219929

An object of the present invention is to eliminate or reduce the warp of the bottom surface of a rectangle without relying on the improvement of rigidity.

It is also an object of the present invention to be able to maintain stable independence for a long period of time.

In the self-supporting thin rectangular parallelepiped carton according to the present invention, the long side of the rectangular outer bottom panel is on the lower edge of the short side of the rectangular front panel, and the left and right sides of the rectangle narrower than the front panel are on both sides of the long side of the front panel. The long side of the side panel is made of a pattern having a panel configuration in which the long side of the rectangular back panel is connected to either side edge of the left or right side panel, and the outer bottom surface thereof. The panel is formed with an inclined concave surface that is inclined from one long side of the outer bottom panel toward the other long side, or from one short side toward the other short side.

In a carton that is made three-dimensionally by folding a paper pattern, the elasticity (repulsive force) of the paper exerts a force on the panel to return it to the state before it was folded. Since the outer bottom panel connected to the front panel is folded inward, an outward force tends to be generated. According to the present invention, the outer bottom panel is formed with an inclined concave surface that is inclined from one long side of the outer bottom panel toward the other long side, or from one short side toward the other short side. Therefore, even if an outward force acts on the outer bottom panel due to the repulsive force of the paper, it is possible to make it difficult for the outer curved bottom surface to come into contact with the ground plane (flat surface), and prevent the instability of the thin rectangular parallelepiped carton from becoming unstable. Or it can be mitigated.

Since the outer bottom panel of a self-supporting thin rectangular parallelepiped carton is rectangular and tends to warp outward in an arc shape when viewed from the side, it is preferable to form the inclined concave surface so as to extend in the longitudinal direction of the outer bottom panel. .. However, the inclined concave surfaces may be divided into a plurality of parts, and the plurality of inclined concave surfaces may be formed by arranging them in the longitudinal direction of the outer bottom panel or in the lateral direction.

The inclined concave surface may be formed so that the depth gradually increases from one long side of the outer bottom panel to the other long side, or from one short side of the outer bottom panel to the other short side. It may be formed so that the depth gradually increases toward the side.

Preferably, the long side of the rectangular inner bottom panel is connected to the lower edge of the short side of the back panel, and the inner bottom panel is also oriented from one long side to the other long side of the outer bottom panel. Alternatively, an inclined concave surface is formed that inclines from one short side toward the other short side.

It is a pattern of the thin rectangular parallelepiped carton of the first embodiment. It is a perspective view which looked at the bottom surface of the thin rectangular parallelepiped carton of 1st Example. It is the end view of the lower part of the thin rectangular parallelepiped carton along the line III-III of FIG. It is a pattern of the thin rectangular parallelepiped carton of the second embodiment. It is a perspective view which looked at the bottom surface of the thin rectangular parallelepiped carton of 2nd Example. It is a pattern of the thin rectangular parallelepiped carton of the third embodiment. It is a paper pattern of the thin rectangular parallelepiped carton of the fourth embodiment. It is a perspective view which looked at the bottom surface of the thin rectangular parallelepiped carton of 4th Example. It is a paper pattern of the thin rectangular parallelepiped carton of the fifth embodiment. It is a perspective view which looked at the bottom surface of the thin rectangular parallelepiped carton of 5th Example. It is a pattern of the thin rectangular parallelepiped carton of the sixth embodiment. It is a perspective view which looked at the bottom surface of the thin rectangular parallelepiped carton of 6th Example.

FIG. 1 shows a development view of a thin rectangular parallelepiped carton of the first embodiment. FIG. 2 is a perspective view of the thin rectangular parallelepiped carton of the first embodiment as viewed from the bottom surface. FIG. 3 is an end view of the lower part of the thin rectangular parallelepiped carton along the line III-III of FIG.

The developed view 1A of FIG. 1 shows a cardboard pattern forming a thin rectangular parallelepiped carton 1B (FIGS. 2 and 3), and shows an outer surface when assembled into the thin rectangular parallelepiped carton 1B. The alternate long and short dash line indicates a fold line that is folded into a mountain when assembling the thin rectangular parallelepiped carton 1B. In order to facilitate bending, squeeze processing is applied along this alternate long and short dash line.

The thin rectangular parallelepiped carton 1B shown in FIGS. 2 to 3 is produced by bending (die-cutting) the paper pattern 1A as shown in FIG. 1 and adhering (gluing) the necessary portions.

With reference to FIG. 1, the right side panel 11, the front panel 12, the left side panel 13, the back panel 14, and the glue margin panel 15 are arranged side by side. The right side panel 11, the front panel 12, the left side panel 13, the back panel 14, and the glue margin panel 15 are all higher in height (length in the vertical direction) than their width (length in the horizontal direction). It has a rectangular shape.

The outer top panel 21 is connected to the upper edge of the front panel 12, and the inner top panel 22 is connected to the upper edge of the back panel 14. The outer bottom panel 31 is connected to the lower edge of the front panel 12, and the inner bottom panel 32 is connected to the lower edge of the back panel 14. Flaps 41 are connected to the upper and lower edges of the left and right side panels 11 and 13.

Perforations (distanced) were formed at the boundary between the front panel 12 and the outer bottom panel 31 connected to the lower edge thereof, and the boundary between the back panel 14 and the inner bottom panel 32 connected to the lower edge thereof. A row of multiple holes) M is formed. The perforations M are formed to reduce the repulsion (force to return to the posture before folding) when the thick paper is folded. A half cut may be formed instead of the perforation.

Inclined concave surfaces 31A and 32A are formed on the surfaces (outer surfaces) of the outer bottom panel 31 and the inner bottom panel 32.

The inclined concave surface 31A formed on the outer bottom panel 31 is formed in the longitudinal direction of the outer bottom panel 31 (the direction connecting the left and right short sides), and is formed from the boundary (perforation M) with the front panel 12 to the outer bottom panel 31. It has an inclination that gradually deepens toward the tip edge of the sewing machine. The inclined concave surface 32A formed on the inner bottom panel 32 is formed in the longitudinal direction of the inner bottom panel 32 (the direction connecting the left and right short sides), and the boundary between the tip edge of the inner bottom panel 32 and the back panel 14 ( It has a slope that gradually deepens toward the perforation M). The depth of the deepest part of the inclined concave surfaces 31A and 32A depends on the paper thickness, but if the paper thickness is 400 μm, for example, it is about 100 μm to 200 μm. The inclined concave surfaces 31A and 32A are formed by pressing a mold having an inclined convex surface against the surfaces (outer surfaces) of the outer and inner bottom panels 31 and 32. However, the inclined concave surfaces 31A and 32A can be formed even if a ruled line blade for forming a normal ruled line is used for the stamping die. In this case, a face plate receiving the stamping die having an inclined concave surface is used.

With reference to FIG. 3, the inclined concave surfaces 31A and 32A of the outer and inner bottom panels 31 and 32 are formed at locations (ranges) where the outer and inner bottom panels 31 and 32 overlap when the outer and inner bottom panels 31 and 32 are overlapped. An inclined convex surface is formed on the inner surface of the outer and inner bottom panels 31 and 32 corresponding to the inclined concave surfaces 31A and 32A formed on the outer surfaces of the outer and inner bottom panels 31 and 32.

The thin rectangular parallelepiped carton 1B is assembled as follows. That is, the pattern 1A is folded at the boundary between the left side panel 13 and the back panel 14, and the boundary between the front panel 12 and the right side panel 11 is also folded. The overlapping glue margin panels 15 and the right side panel 11 are bonded to form a cylinder, and then the boxes are placed so that the angles between the adjacent panels are at right angles. A square tube with open top and bottom surfaces is created.

Fold the flaps 41 connected to the lower edges of the left and right side panels 11 and 13 at right angles inward, and then fold the inner bottom panel 32 connected to the lower edges of the back panel 14 at right angles inward. Finally, the outer bottom panel 31 connected to the lower edge of the front panel 12 is folded at a right angle inward, and the inner surface of the outer bottom panel 31 and the outer surface of the inner bottom panel 32 are adhered to each other. The bottom of the square tube is closed.

Contents such as pharmaceuticals, cosmetics, and confectionery are placed in the square tube from the upper surface to be opened, and then the upper surface opening is also closed. Similar to the process of closing the lower surface, the flaps 41 on the upper edges of the left and right side panels 11 and 13 are folded at right angles inward, and the inner top panel 22 on the upper edge of the back panel 14 is folded at right angles inward. Finally, the outer top panel 21 on the upper edge of the front panel 12 is folded at a right angle inward, and the inner surface of the outer top panel 21 and the outer surface of the inner top panel 22 are bonded to each other. The top surface of the square tube is closed, and the thin rectangular parallelepiped carton 1B is completed.

With reference to FIGS. 2 and 3, the inclined concave surfaces 31A and 32A on the outer surfaces of the outer and inner bottom panels 31 and 32 constituting the bottom surface of the thin rectangular parallelepiped carton 1B are recessed inward, so that the inclined concave surfaces 31A and 32A are recessed inward. The area surrounding the inclined concave surfaces 31A and 32A that are not grounded and the inclined concave surfaces 31A and 32A are not formed is the grounding surface (the area that surrounds the inclined concave surface 31A of the outer bottom panel 31 is grounded), and here the thin rectangular parallelepiped carton 1B Will be supported.

In a carton that is made three-dimensionally by folding a paper pattern, the elasticity (repulsive force) of the paper exerts a force on the panel to return it to the state before it was folded. Since the outer bottom panel 31 connected to the lower edge of the front panel 12 is folded inward, an outward force is generated. The inner bottom panel 32, which is connected to the lower edge of the back panel 14, is also folded inward, so that an outward force is generated. The outward force acts on the boundary between the front panel 12 and the outer bottom panel 31 and the boundary between the back panel 14 and the inner bottom panel 32. Since the outer and inner bottom panels 31 and 32 are adhered to each other, they tend to be curved in a direction that warps outward (downward) when viewed from the side.

Here, since the inclined concave surfaces 31A and 32A are formed on the outer and inner bottom panels 31 and 32, the outer working on the boundary between the front panel 12 and the outer bottom panel 31 and the boundary between the back panel 14 and the inner bottom panel 32. The repulsive force of the oriented paper is not transmitted or is difficult to be transmitted in the range of the inclined concave surfaces 31A and 32A. Further, even if the inclined concave surfaces 31A and 32A are curved outward, it is difficult to project outward far beyond the ground contact surface (the range surrounding the inclined concave surfaces 31A and 32A), and therefore the outward curved bottom surface is in contact with the flat surface and is thin. It does not destabilize the rectangular parallelepiped carton 1B.

Furthermore, by making the concave surfaces formed on the outer and inner bottom panels 31 and 32 slopes, the unevenness becomes smooth and the design is excellent without disturbing the print display portion. In addition, since the cross section gradually becomes flat from the start of the step, the cross section becomes pseudo (relatively) stepped, and the bending repulsive force acting on the boundary can be effectively suppressed.

Further, since the thin rectangular parallelepiped carton 1B does not form a leg portion by using a notch, a gap (hole) is not formed due to the notch, and it is possible to prevent dust from entering the carton 1B.

The inclined concave surface may be formed at least on the outer bottom panel 31, and does not necessarily have to be formed on the inner bottom panel 32. However, it is preferable to form an inclined concave surface on the inner bottom panel 32 as well.

4 and 5 show a second embodiment, and FIG. 4 shows a cardboard pattern 2A forming a thin rectangular parallelepiped carton. FIG. 5 is a perspective view showing a thin rectangular parallelepiped carton 2B formed from the paper pattern 2A from the bottom surface. In the paper pattern 1A and the thin rectangular parallelepiped carton 1B shown in FIGS. 1 and 2, the inclined concave surfaces 31B and 32B formed on the outer and inner bottom panels 31 and 32 form short sides of the outer and inner bottom panels 31 and 32. The difference is that they are formed (end to end) throughout the tie. The thin rectangular parallelepiped carton 1B is supported in a region extending in the longitudinal direction in each of the front panel 12 and the back panel 14 sandwiching the inclined concave surfaces 31B and 32B. The thin rectangular parallelepiped carton 1B is stably self-supporting by being supported by the front panel 12 and the back panel 14 respectively.

FIG. 6 shows a pattern 3A forming the thin rectangular parallelepiped carton of the third embodiment. The paper pattern 1A forming the thin rectangular parallelepiped carton of the first embodiment shown in FIG. 1 has inclined concave surfaces 31A1, 31A2, 32A1, 32A2 extending in the longitudinal direction arranged vertically on each of the outer and inner bottom panels 31 and 32. The difference is that they are formed at intervals (in the direction connecting the front and back). In addition, a total of four inclined concave surfaces 31A1, 31A2, 32A1, 32A2 gradually gradually move toward the boundary (perforation M) with the front and back panels 12 and 14 from the tip edges of the outer and inner bottom panels 31 and 32. The difference is that it has a deeper slope.

By forming two inclined concave surfaces side by side in the direction connecting the front panel 12 and the back panel 14, it is possible to prevent the outward force applied to the outer and inner bottom panels 31 and 32 in two stages.

Since the inclined concave surfaces 31A1 and 31A2 formed on the outer bottom panel 31 and the inclined concave surfaces 32A1 and 32A2 formed on the inner bottom panel 32 are inclined in the same direction (the direction gradually becomes deeper toward the perforation M), Although the unevenness does not completely overlap when the outer bottom panel 31 and the inner bottom panel 32 are overlapped, the depth of the inclined concave surface is about 100 μm to 200 μm as described above, so the outer bottom panel is made of adhesive or the like. These can be glued while filling the space between the inner surface of 31 and the outer surface of the inner bottom panel 32. The direction of the inclined concave surface (whether it is shallow or deep toward the tip edges of the outer and inner bottom panels 31 and 32) can be arbitrarily designed. However, the outward force generated on the outer and inner bottom panels 31 and 32 by the repulsive force of the paper acts on the boundary between the front panel 12 and the outer bottom panel 31 and the boundary between the back panel 14 and the inner bottom panel 32, so at least It is preferable that one inclined concave surface is formed in a direction in which the inclination becomes deeper toward this boundary.

The inclined concave surfaces 31A1, 31A2, 32A1, 32A2 of the third embodiment may also be formed on the entire surface (from end to end) connecting the short sides of the outer and inner bottom panels 31 and 32 (FIGS. 1 and 2). The same relationship as the inclined concave surfaces 31A and 31B shown in (1).

7 and 8 show a fourth embodiment, and FIG. 7 shows a pattern 4A forming a thin rectangular parallelepiped carton. FIG. 8 is a perspective view showing the thin rectangular parallelepiped carton 4B formed from the paper pattern 4A from the bottom surface.

An inclined concave surface 31C ₁ and an inclined concave surface 31C ₂ are formed on the outer bottom panel 31 side by side in the longitudinal direction at intervals. _{The inclined concave surface 31C 1} formed on the left side of the outer bottom panel 31 has an inclination that gradually becomes deeper toward the left short side of the outer bottom panel 31. _{The inclined concave surface 31C 2} formed on the right side of the outer bottom panel 31 has an inclination that gradually becomes deeper toward the right short side of the outer bottom panel 31. Inner bottom panel 32 is also similar, they are formed side by side in the longitudinal direction and the inclined concave 32C ₁ and inclined concave 32C ₂ are spaced, inclined concave 32C ₁ which is formed on the left side of the inner bottom panel 32 _{The inclined concave surface 32C 2} formed on the right side of the inner bottom panel 32 has an inclination that gradually becomes deeper toward the left short side of the inner bottom panel 32, and the inclined concave surface 32C 2 gradually increases toward the right short side of the inner bottom panel 32. It has a slope that increases the depth. By forming a concave surface having an inclination in the direction connecting the short sides of the outer and inner bottom panels 31 and 32 in this way, the self-supporting stability of the thin rectangular parallelepiped carton 4B can be improved.

9 and 10 show a fifth embodiment, and FIG. 9 shows a pattern 5A forming a thin rectangular parallelepiped carton. FIG. 10 is a perspective view showing a thin rectangular parallelepiped carton 5B formed from the paper pattern 5A from the bottom surface.

An inclined concave surface 31D ₁ , an inclined concave surface 31D _2, and an inclined concave surface 31D ₃ are formed side by side in the longitudinal direction on the outer bottom panel 31 at intervals. Inclined concave 31D _1, 31D _2, 31D ₃ is both inclined in the direction connecting the long sides of the outer bottom panel 31, for the orientation, the inclination concave 31D ₁ and the inclined concave surface 31D ₃ at both ends While it is inclined in a direction that gradually becomes deeper from the boundary with the front panel 12 (perforation M) toward the tip of the outer bottom panel 31, the inclined concave surface 31D ₂ sandwiched between them is inclined toward the outer bottom panel 31. It is inclined in a direction gradually deepening from the tip end portion toward the boundary (perforation M) with the front panel 12.

_{Regarding the inner bottom panel 32, the inclined concave surfaces 32D 1} and the inclined concave surfaces 32D _{3 at} both ends are provided so that the inclined concave surfaces can be overlapped with each other when the outer bottom panel 31 and the inner bottom panel 32 are overlapped with each other. Is inclined in a direction that gradually becomes deeper from the tip of the inner bottom panel 32 toward the boundary with the back panel 14, and the inclined concave surface 32D ₂ sandwiched between them is from the boundary with the back panel 14 to the inner bottom panel 32. It is inclined in a direction that gradually becomes deeper toward the tip.

As described above, since the force that bends the outer and inner bottom panels 31 and 32 outward is generated at the boundary between the front panel 12 and the outer bottom panel 31 and the boundary between the back panel 14 and the inner bottom panel 32, the front panel It is preferable to have a structure that reduces the force of bending outward in a well-balanced manner with respect to the boundary between 12 and the outer bottom panel 31 and the boundary between the back panel 14 and the inner bottom panel 32. As described above, this balance can be achieved by forming a plurality of inclined concave surfaces having opposite inclination directions on each of the outer and inner bottom panels 31 and 32.

11 and 12 show a sixth embodiment, and FIG. 11 shows a pattern 6A forming a thin rectangular parallelepiped carton. FIG. 12 is a perspective view showing a thin rectangular parallelepiped carton 6B formed from the paper pattern 6A from the bottom surface.

The inclined concave surfaces 31E and 32E are both formed in the longitudinal direction of the outer and inner bottom panels 31 and 32, and gradually toward the left and right short sides at the left and right ends of the outer and inner bottom panels 31 and 32, respectively. It has a slope that makes the depth shallower. The self-sustaining stability of the thin rectangular parallelepiped carton 6B is also improved by such inclined concave surfaces 31E and 32E.

1A, 2A, 3A, 4A, 5A, 6A Paper pattern 1B, 2B, 4B, 5B, 6B Thin rectangular parallelepiped carton
31 outer bottom panel
32 Inner bottom panel
31A, 31A1, 31A2, 32A, 32A1, 32A2, 31B, 32B, 31C ₁ , 31C ₂ , 32C ₁ , 32C ₂ , 31D ₁ , 31D ₂ , 31D ₃ , 32D _{1 , 32D 2} , 32D ₃ , 31E, 32E Inclined concave surface

Claims (4)

The long side of the outer bottom panel of the rectangle is on the lower edge of the short side of the rectangular front panel, and the long sides of the left and right side panels of the rectangle narrower than the front panel are on both sides of the long side of the front panel. A self-supporting thin rectangular parallelepiped carton made from a pattern having a panel configuration in which the long sides of a rectangular back panel are connected to any side edge of the side panel.
A part of the outer bottom panel is continuously deepened from one long side to the other long side of the outer bottom panel, or from one short side to the other short side. inclined concave surface that inclines have been made form, in the direction connecting the said inclined concave surface connecting the one long side and the other long side are inclined direction or one short side and the other short side, the inclination There is a non-tilted bottom surface where no inclined concave surface is formed between the deepest part of the concave surface and the edge of the outer bottom panel on the extension in the direction of deepening the inclination.
Self-supporting thin rectangular parallelepiped carton. The inclined concave surface is formed in the longitudinal direction of the outer bottom panel,
The self-supporting thin rectangular parallelepiped carton according to claim 1. A plurality of inclined concave surfaces are formed side by side in the longitudinal direction or the lateral direction of the outer bottom panel.
The self-supporting thin rectangular parallelepiped carton according to claim 1 or 2. The long side of the rectangular inner bottom panel is connected to the lower edge of the short side of the back panel, and the inner bottom panel is also from one long side of the outer bottom panel to the other long side, or one of them. An inclined concave surface is formed that inclines from one short side to the other short side.
The self-supporting thin rectangular parallelepiped carton according to any one of claims 1 to 3.

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