JPH0414342Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a packaging box equipped with a double plate-like end wall made of cardboard or other thick paper.

[Conventional technology]

As shown in FIGS. 4 to 6, conventional packaging boxes of this type include a pair of single-plate side walls 52 and a pair of double-plate end walls 53 on the four sides of a bottom wall 51; It is known that a large lid flap 54 is connected to the upper end of one side wall 52, and a narrow lid flap 55 is connected to the upper end of the other side wall 52.

As shown in the development view shown in FIG. 5, the double plate-like end wall has an outer end wall 56 and an inner end wall 57 that are connected to the left and right edges of the bottom wall 51, and the bottom wall and the outer end wall are connected to each other. A small locking hole 58 is provided slightly closer to the bottom wall on the boundary line with the inner end wall, and a projecting piece 59 that is fitted into the locking hole is provided at the center of the free edge of the inner end wall.

Further, a folding piece 60 is provided at both ends of each side wall and is folded in and held between the double plate-shaped end walls (see FIG. 6).

[The problem that the idea attempts to solve]

However, in this known packaging box, there is a locking hole that penetrates the bottom wall that is in contact with the ground, and dirt, etc. may enter through this locking hole during transportation and storage, and it is difficult to ensure that the box does not fall out. Therefore, even if the protruding piece is allowed to protrude downward from the locking hole to some extent, there is a problem that when the protruding piece is placed on a flat surface, the protruding piece is pushed to the lower surface of the bottom wall and easily comes off.

In addition, when this packaging box is packed and sealed, there is a gap between the upper end of the end wall and the lid flap, which makes it easy for dirt to enter during transportation and storage, and both edges of the lid flap fall into the box body. There were some problems, such as ease of use.

This invention was made in view of the problems of conventional products, and its purpose is to eliminate the presence of locking holes in the bottom wall and to protect the double end wall and body. This ensures that the protruding piece at the tip of the folding plate connected to the upper edge of the outer end wall for shaping and the locking hole provided in the connecting plate is fitted securely, and furthermore, when sealing, the upper edge of the end wall and the lid flap are secured. The present invention aims to provide a packaging box in which the gap between the lid flap and the lid flap is reduced and the lid flap does not fall into the box body.

[Means to solve the problem]

In order to achieve the above object, the packaging box according to this invention has a side wall and a lid flap connected to one opposite edge of the bottom wall, and an outer end wall is connected to both edges of the one side wall. A connecting plate is connected between the facing edges of the outer end wall, inner end wall, and bottom wall on a development board in which an inner end wall that overlaps the outer end wall is connected to both ends of the other side wall, and the connection plate is connected to the developing board. The board is provided with two diagonal crease lines that bisect the corner between each end wall, and a score line that helps bend each diagonal crease line extends to the diagonal crease line. A folding plate and an inner lid flap are arranged side by side on the upper edge, and after the outer end wall is erected, the inner end wall is erected. It is fitted into a locking hole provided in the connecting plate.

[Effect]

In the packaging box configured in this way, the end wall is formed by the overlapping inner and outer end walls, and the protruding piece at the lower end of the folding plate connected to the outer end wall is engaged with the connecting plate at the lower end of the inner end wall. When it is fitted into the hole and locked, the connecting plate folded back by the two diagonal fold lines is fixed and the box body can maintain its shape.

〔Example〕

Figures 1 to 3 show examples of this invention,
As shown in FIG. 1, this packaging box has side walls 2, 2' connected to opposite long edges of a long and narrow rectangular bottom wall 1 made of cardboard or other thick paper.
Following the side wall 2 is an outer lid flap 3 having approximately the same shape as the bottom wall.
In addition, a narrow lid flap 4 is provided next to the side wall 2', and an outer end wall 5 that is continuous with the side wall 2 and an inner end wall 6 that is continuous with the side wall 2' are provided on the short opposite edges of the bottom wall. It is made by bending a single punched substrate as shown in FIG. 2.

The punched substrate will be explained in detail. A side wall 2 is attached to one long end edge of the rectangular bottom wall 1 via a horizontal fold line 7.
A side wall 2' and an outer lid flap 3 following this are connected, and a side wall 2' and a small lid flap 4 following this are connected to the edge opposite to this through a transverse fold line 7'. The outer end wall 5 is attached to the left and right edges through the vertical fold line 8.
In addition, an inner end wall 6 is connected to the left and right edges of the other side wall 2' via a vertical fold line 8, and a fold line is provided between the opposing edges of the outer end wall, inner end wall, and bottom wall. A connecting plate 9 (details will be described later) is provided in series.

The connecting plate 9 has two diagonal fold lines 10 starting from each corner of the bottom wall and inclined at 45 degrees with respect to the vertical fold line 8.
is provided, and these two diagonal fold lines do not intersect, and the cut line 1 is made from the middle toward the free end.
8 has been applied.

A folding plate 14 is connected to the upper edge of the outer end wall 5 in a portion close to the outer lid flap 3 and presses down the connecting plate at the lower end of the inner end wall, and an inner lid flap 15 is connected to the remaining portion. It is set up.

A small locking hole 16 is provided near the base of the connecting plate connected to the edge of the inner end wall 6 at a position corresponding to the box assembly insertion plate 14, and a small locking hole 16 is provided at the tip of the folding plate 14 connected to the outer end wall 5. A protruding piece 17 that is fitted into the locking hole 16 is continuously provided.

The free end of the connecting plate 9 is divided by a score line 18 that starts from the ends of both diagonal fold lines 10 and extends to the free end, and after overlapping the center portion of the connecting plate 9 with the bottom surface, the diagonal fold is formed. It is possible to turn back the perspective and overlap the parts of the connecting plate near the outer end wall 5 and the inner end wall 6 (see FIG. 3).

When assembling a packaging box from the punched substrate, as shown in FIG. 3, first fold and attach the connecting plate 9 to the upper surface of the bottom wall (adhering is not necessarily required), then attach each side wall to the upper surface of the bottom wall. 2 and 2', the outer end wall 5 and the inner end wall 6 rise accordingly, and the protruding piece 17 at the tip is folded over the folding plate 14 connected to the outer end wall onto the inner surface of the inner end wall 6. When it is fitted into the locking hole 16 and locked, the shape of the peripheral wall is maintained and a box body with an open top is assembled.

When storing and sealing items, use inner lid flap 1.
5. Fold the small flap 4 and the outer flap 3 in this order and use adhesive tape to secure the outer flap and the side wall on the small flap side.

In addition, if the connecting plate is folded up on the top of the bottom wall and the center part is attached when manufacturing the box, it is advantageous because it can be transported and stored as a flat body with a small area and does not take up much space, and it is extremely easy to assemble into the box body. can.

[Effect of idea]

This idea is structured as described above, so
This produces the following effects.

Since there is no locking hole that penetrates the bottom wall that is in contact with the ground during transportation and storage, there is no possibility of dirt entering the box. Since it is locked to the box, the projecting piece is highly prevented from coming off, and there is no problem of the box body being disassembled inadvertently. In addition, the upper opening has an inner flap in the direction perpendicular to the outer flap, which increases the load capacity of the top surface and eliminates unnecessary gaps on the upper edge of the double-plate end wall, making it highly dustproof. There are other effects.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the invention, FIG. 2 is an exploded view of the same, and FIG. 3 is an explanatory view showing an assembly procedure of the same. Further, FIG. 4 is a partially cutaway perspective view showing a conventional example, and FIGS. 5 and 6 are an exploded view of the same and explanatory views showing an assembly procedure. 1, 51... bottom wall, 2, 2', 52... side wall,
3... Outer lid flap, 5, 56... Outer end wall, 6,
57... Inner end wall, 9... Connecting plate, 10... Diagonal fold line, 14... Folding plate, 15... Inner lid flap,
16, 58...Locking hole, 17, 59...Protrusion piece.

Claims (1)

[Scope of utility model registration request] A side wall and a lid flap following the side wall are connected to one opposite edge of the bottom wall, an outer end wall is provided to both ends of the one side wall, and an inner wall is provided to overlap the outer end wall to both ends of the other side wall. A connecting plate is connected between the opposing edges of the outer end wall, inner end wall, and bottom wall on a developing board with end walls arranged in series, and the corner between each end wall is divided into two on this connecting plate. Two diagonal fold lines are provided, and a cut line that helps bend each diagonal fold line is extended to the diagonal fold line, and a folding plate and an inner lid flap are provided on the upper edge of the outer end wall. A package formed by placing the outer end wall upright, then standing up the inner end wall, and fitting the projecting piece provided on the lower edge of the folding plate into the locking hole provided in the connecting plate at the lower end of the inner end wall. box.