JP7435395B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes.

As a cardboard packaging box with a cylindrical body having front and rear end walls and left and right side walls, the bottom plate is automatically assembled when the body is opened into a cylindrical shape from a folded packaging box. (For example, see Patent Document 1).
The bottom plate of such a packaging box is composed of a first flap connected to the lower edge of the end wall and a second flap connected to the lower edge of the side wall. The first flap is formed with a flap main body connected to the lower edge of the end wall, and a folded part connected to the side edge of the flap main body via a fold line, and the second flap is formed in the folded part. The flaps are joined.

When folding the packaging box described above, the body is folded while the first flap and the second flap are inserted into the body. At this time, the first flap is folded along the fold line, and the flap main body, the folded portion, and the second flap are stored in the trunk in an overlapping state.
Additionally, when assembling a folded packaging box into a box shape, the first and second flaps unfold within the body as the body is opened into a cylindrical shape, allowing the bottom plate to be assembled automatically. .

Utility Model Publication No. 1-158419

In a packaging box in which an inclined wall is formed between adjacent end walls and side walls, when the box is folded from a box shape, the lateral distance between the end wall and the side wall changes due to the inclined wall. Therefore, it is difficult to connect the first flap and the second flap and configure the bottom plate to be automatically assembled, as in the conventional packaging box described above.

The present invention solves the above-mentioned problems and provides a packaging box in which a bottom plate can be easily assembled when assembling a box shape from a folded state in a configuration in which an inclined wall is formed between adjacent wall plates. The task is to

In order to solve the above problems, the present invention provides a packaging box, which includes a cylindrical body section having four wall plates and four inclined walls formed between the adjacent wall plates, and the body section. and a bottom plate provided in the lower opening of the. The body includes a pair of front and rear first wall plates, a pair of left and right second wall plates, and a first inclined wall and a second inclined wall formed between the first wall plate and the second wall plate. walls are formed, the two first sloping walls are arranged in diagonal relationship , and the two second slant walls are arranged in diagonal relationship. The bottom plate includes a first flap connected to a lower edge of the first wall plate, and a second flap connected to a lower edge of the second wall plate. The first flap includes a flap body connected to a lower edge of the first wall plate, and a flap body connected to a side edge of the flap body on the first inclined wall side via a first fold line. A folded portion is formed. The first fold line is formed from the end of the lower edge of the first wall plate on the first inclined wall side to the tip of the first flap. A first inclined edge portion is formed in the folded portion and is arranged along a lower edge portion of the first inclined wall. A second inclined edge is formed on the flap main body along a lower edge of the second inclined wall. The second flap includes a non-joint part connected to the lower edge of the second wall board, and a joint part connected to the tip edge of the non-joint part via a second fold line. It is formed. The second fold line is formed from a lower edge of the second wall plate to a side edge of the second flap on the first inclined wall side. The joint portion of the second flap is joined to the folded portion of the first flap. The angle between the lower edge of the first wall plate and the first fold line is set to θ degrees. The angle between the first fold line and the first inclined edge is set to θ+x degrees. The angle between the lower edge of the second wall plate and the second fold line is set to x/2 degrees. By folding the first flap along the first fold line and folding the second flap along the second fold line, the body can be folded while maintaining the connection between the first flap and the second flap. It is.

When folding the packaging box of the present invention, the body is folded while the first flap and the second flap are inserted into the body. In this way, the first flap is bent at the first fold line and folded within the body.
Further, the second flap is drawn into the folded portion of the first flap and bent at the second fold line. Since the second fold line is inclined with respect to the lower edge of the second wall plate, the joint part (tip side part) of the second flap is bent at an angle with respect to the lower edge of the second wall plate. It will be done.
Thereby, even in a configuration in which an inclined wall is formed between adjacent wall plates, the connection between the first flap and the second flap can be maintained when the packaging box is folded.
When assembling a folded packaging box into a box shape, the first and second flaps unfold within the body as the body is opened into a cylindrical shape, allowing the bottom plate to be assembled automatically. .

In the packaging box described above, the body includes a pair of front and rear first wall plates, a pair of left and right second wall plates, two diagonal first inclined walls, and a diagonal pair of first wall plates. Two second inclined walls in relation to each other may be formed. In this case, the first flap is formed with a second inclined edge along the lower edge of the second inclined wall.
With this configuration, when assembling a packaging box having an octagonal body into a box shape from a folded state, the bottom plate can be automatically assembled.

According to the present invention, when assembling a packaging box having a body with an inclined wall formed between adjacent wall plates into a box shape from a folded state, the bottom plate can be easily assembled.

FIG. 1 is a perspective view of a packaging box according to an embodiment of the present invention, viewed from the front lower right. It is a figure showing a blank sheet of a packaging box concerning an embodiment of the present invention. It is an explanatory view showing composition of a first flap and a second flap in a blank sheet of a packaging box concerning an embodiment of the present invention. It is a bottom view showing a packaging box concerning an embodiment of the present invention. FIG. 2 is a side view showing a packaging box according to an embodiment of the present invention in a folded state.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, the front, rear, left, and right directions are set for convenience in explaining the packaging box of this embodiment, and do not limit the configuration or use condition of the packaging box.

As shown in FIG. 1, the packaging box 1 of this embodiment includes a body 10 formed in an octagonal rectangular tube shape, a bottom plate 20 that closes an opening on the lower side of the body 10, and a body A top plate 30 that closes the upper opening of the portion 10 is provided.

The packaging box 1 of this embodiment is formed by mountain-folding or valley-folding a blank sheet S (see FIG. 2) cut out from a sheet made of corrugated cardboard along each fold line. The blank sheet S shown in FIG. 2 is arranged so that the inner surface side is visible.
The fold line of the blank sheet S is a ruled line (pressed line) formed by pressing the surface of the blank sheet S into a linear shape. Note that intermittent cuts may be formed in the ruled lines. This makes it easier to fold the blank sheet S along the fold line.
Alternatively, the folded line may be formed by intermittent half-cut slits that cut only the surface of the sheet or slits that penetrate through the sheet to form a linear shape.

As shown in FIG. 1, the body section 10 includes a pair of front and rear first wall plates 11, 11, a pair of left and right second wall plates 12, 12, and two second wall plates diagonally located at the front left and rear right. It includes one inclined wall 14, 14 (see FIG. 2) and two second inclined walls 15, 15 diagonally located at the front right and rear left.
In this embodiment, the first wall plate 11, the second wall plate 12, the first inclined wall 14, and the second inclined wall 15 are formed in a rectangular shape. Octagonal openings are formed in the upper and lower surfaces of the body 10.

The two first inclined walls 14, 14 are formed at the front left corner and the rear right corner of the trunk 10, as shown in FIG. The first inclined wall 14 is formed between the first wall plate 11 and the second wall plate 12 that are adjacent to each other. A side edge of the first wall plate 11 is connected to one side edge of the first inclined wall 14 via a fold line, and a side edge of the second wall plate 12 is connected to the other side edge. They are connected via a polygonal line. The first inclined wall 14 is inclined with respect to the first wall plate 11 and the second wall plate 12.

The two second inclined walls 15, 15 are formed at the front right corner and the rear left corner of the body 10. The second inclined wall 15 is formed between the first wall plate 11 and the second wall plate 12 that are adjacent to each other. A side edge of the first wall plate 11 is connected to one side edge of the second inclined wall 15 via a fold line, and a side edge of the second wall plate 12 is connected to the other both side edges. They are connected via a polygonal line. The second inclined wall 15 is inclined with respect to the first wall plate 11 and the second wall plate 12.

As shown in FIG. 1, a joint piece 13 is connected to the right edge of the second inclined wall 15 on the right front. The joining piece 13 is joined to the inner surface of the first wall plate 11 on the rear side.
By bending the blank sheet S (see FIG. 2) along each fold line and joining the joining piece 13 to the inner surface of the first wall plate 11 on the rear side, an octagonal cylindrical body 10 is formed in plan view. Ru.

The top plate 30 is composed of an outer flap 31 and an inner flap 32 shown in FIG. A pair of front and rear outer flaps 31, 31 are connected to the upper edges of the front and rear first wall plates 11, 11, and a pair of left and right inner flaps are connected to the upper edges of the left and right second wall plates 12, 12. By overlapping the flaps 32, 32, a top plate 30 shown in FIG. 1 is formed. The upper opening of the body 10 is closed by the top plate 30.

The bottom plate 20 includes a pair of front and rear first flaps 21, 21 connected to the lower edges of the front and rear first wall plates 11, 11, and a pair of front and rear first flaps 21, 21 connected to the lower edges of the left and right second wall plates 12, 12. It is formed by a pair of left and right second flaps 22, 22. The bottom opening of the body 10 is closed by the bottom plate 20.

The base end edge 21a of the first flap 21 on the front side is connected to the lower edge L1 of the first wall plate 11 on the front side via a fold line. The first front flap 21 closes the front half of the lower opening of the trunk 10 . As shown in FIG. 2, a recess 21c is formed in the center of the tip edge 21b of the first flap 21 on the front side.

As shown in FIG. 4, the left edge of the first flap 21 on the front side includes a first inclined edge 21d arranged along the lower edge of the first inclined wall 14 on the left side, and a second wall on the left side. A first side edge 21e disposed along the lower edge of the plate 12 is formed.
On the right edge of the first flap 21 on the front side, there is a second inclined edge 21f arranged along the lower edge of the second inclined wall 15 on the front right, and on the lower edge of the second wall plate 12 on the right side. A second side edge portion 21g is formed along the second side edge portion 21g.

The first flap 21 on the front side includes a flap body 23 connected to the lower edge L1 of the first wall plate 11 on the front side, and a flap body 23 on the side edge on the first inclined wall 14 side (left side) of the flap body 23. A folded portion 24 is formed which is connected to the folded portion 24 via one fold line L11.

As shown in FIG. 2, the first fold line L11 is formed from the lower edge L1 of the first wall plate 11 (the proximal edge 21a of the first flap 21) to the tip edge 21b of the first flap 21. ing.
In this embodiment, the tip of the first folded line L11 is connected to the recess 21c formed in the tip edge 21b of the first flap 21.

The first flap 21 is divided into a flap main body 23 and a folded portion 24 on the left and right with the first fold line L11 as a boundary. A first inclined edge 21d is formed on the folded portion 24, and a second inclined edge 21f is formed on the flap body 23.

The base end of the first fold line L11 is connected to the end of the lower edge L1 of the first wall plate 11 on the first inclined wall 14 side (left side). The end of the lower edge L1 of the first wall plate 11, the base end of the first fold line L11, and the base end of the first inclined edge 21d are connected.

As shown in FIG. 3, the angle between the lower edge L1 of the first wall plate 11 and the first fold line L11 is set to θ degrees.
The angle between the first fold line L11 and the first inclined edge 21d is set to θ+x degrees. When the imaginary line L15 is set from the left end of the lower edge L1 of the first wall plate 11 to the left end of the tip edge 21b of the first flap 21, the shape of the first polygonal line L11 and the imaginary line L15 The angle is θ degrees, and the angle between the virtual line L15 and the first inclined edge 21d is x degrees.

As shown in FIG. 4, the base end edge 21a of the first flap 21 on the rear side is connected to the lower edge L1 of the first wall plate 11 on the rear side via a fold line, and is connected to the lower edge L1 of the first wall plate 11 on the rear side. It closes the rear half of the lower opening. The first flap 21 on the rear side has a structure in which the first flap 21 on the front side is reversed in the front and back, and also in the left and right directions (see FIG. 2). That is, in the first flap 21 on the rear side, the folded portion 24 is connected to the right side edge of the flap body 23 via the first fold line L11.

The front and rear first flaps 21, 21 are bent inward of the body 10 with respect to the front and rear first wall plates 11, 11, and the recesses 21c, 21c are combined. The left half of the tip of the first flap 21 on the front side is overlapped with the lower surface of the right half of the tip of the first flap 21 on the rear side. Further, the right half of the tip of the first flap 21 on the rear side is overlapped with the lower surface of the left half of the tip of the first flap 21 on the front side. In this way, the leading ends of the front and rear first flaps 21, 21 are connected to each other.

The base end edge 22a of the second flap 22 on the left side is connected to the lower edge L2 of the second wall plate 12 on the left side via a fold line (see FIG. 2). The second flap 22 on the left side has a width that decreases from the proximal edge 22a toward the distal end.

As shown in FIG. 2, the second flap 22 includes a non-joint part 25 connected to the lower edge L2 of the second wall plate 12, and a second fold line L12 to the tip edge of the non-joint part 25. A joint portion 26 is formed in series.

The second fold line L12 is formed from the rear end of the lower edge L2 of the second wall plate 12 to the side edge of the second flap 22 on the first inclined wall 14 side (rear side). In this embodiment, in the state of the blank sheet S, the end of the second fold line L12 on the first inclined wall 14 side (rear side) is closer to the second wall plate 12 than the lower edge L2 of the second wall plate 12. I'm getting into it.
The angle between the lower edge L2 of the second wall plate 12 and the second fold line L12 is set to x/2 degrees.

The joint part 26 of the second flap 22 on the left side is joined to the upper surface of the folded part 24 of the first flap 21 on the front side. Note that the joint portion 26 is joined to the folded portion 24 by a joining means such as hot melt, and the entire joint portion 26 does not need to be joined to the folded portion 24. Further, the non-joined portion 25 of the second flap 22 is not joined to the folded portion 24.

The base end edge 22a of the second flap 22 on the right side is connected to the lower edge L2 of the second wall plate 12 on the right side via a fold line. The second flap 22 on the right side is configured by inverting the second flap 22 on the left side horizontally and front and back.

When folding the packaging box 1 from a box-like state, with the top plate 30 of the packaging box 1 shown in FIG. The body part 10 is folded with the fold line between the first wall plate 11 on the side and the first inclined wall 14 on the left rear as a folding part.

At this time, the body is folded while the first flaps 21, 21 and the second flaps 22, 22 are inserted into the body 10. In this way, the first flap 21 is bent along the first fold line L11 and folded within the body 10, as shown in FIG.

Further, the second flap 22 is drawn into the folded portion 24 of the first flap 21 and bent at the second fold line L12. Since the second fold line L12 is inclined with respect to the lower edge L2 of the second wall plate 12, the joint portion 26 of the second flap 22 is inclined with respect to the lower edge L2 of the second wall plate 12. It is bent and tilted toward the inclined wall 14 side.
As a result, even if the first inclined wall 14 is formed between the adjacent first wall plate 11 and second wall plate 12, when the packaging box 1 is folded, the first flap 21 and the second flap 22 can maintain a connection with

In order to assemble the folded packaging box 1 into a box shape, as shown in FIG. 1, when the body 10 is opened into a cylindrical shape, the adjacent first wall plate 11 and second wall plate 12 are opened. Along with this, the flap main body 23 and folded portion 24 of the first flap 21 are unfolded at the bottom of the body portion 10. Furthermore, the second flap 22 is also expanded to the bottom of the body section 10 by being pushed by the folded portion 24 of the first flap 21 .
In this way, by opening the folded body section 10 into a cylindrical shape, the bottom plate 20 can be automatically assembled.

Therefore, the packaging box 1 having the octagonal body 10 with the inclined walls 14 and 15 formed between the adjacent wall plates 11 and 12 can be easily folded, and when assembled from the folded state into a box shape. In addition, the bottom plate 20 can be easily assembled.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the spirit thereof.
As shown in FIG. 1, the packaging box 1 of this embodiment includes an octagonal body 10 in which four wall plates 11, 12 and four inclined walls 14, 15 are formed . As a reference example, at least one first inclined wall 14 may be formed in the body portion 10.

In the packaging box 1 of this embodiment, the joint part 26 of the second flap 22 is joined to the upper surface of the folded part 24 of the first flap 21, but the joint part 26 may be joined to the lower surface of the folded part 24. .

In the packaging box 1 of this embodiment, the upper opening of the body 10 is closed by the top plate 30, but the configuration of the top plate 30 is not limited. Furthermore, the packaging box 1 does not need to be provided with the top plate 30.

Although the packaging box 1 of this embodiment is made of cardboard, the packaging box 1 can be made of various known paperboards.

1 Packaging box 10 Body 11 First wall plate 12 Second wall plate 13 Joint piece 14 First inclined wall 15 Second inclined wall 20 Bottom plate 21 First flap 21a Proximal edge 21b Distal edge 21c Recess 21d First inclined Edge 21e First side edge 21f Second inclined edge 21g Second side edge 22 Second flap 22a Base edge 23 Flap body 24 Folded portion 25 Non-joined portion 26 Joined portion 30 Top plate 31 Outer flap 32 Inner flap L11 First polyline L12 Second polyline L15 Virtual line S Blank sheet

Claims (1)

A cylindrical body having four wall plates and four inclined walls formed between the adjacent wall plates, and a bottom plate provided in an opening on the lower side of the body,
The body includes a pair of front and rear first wall plates, a pair of left and right second wall plates, and a first inclined wall and a second inclined wall formed between the first wall plate and the second wall plate. a wall , the two first inclined walls are arranged in a diagonal relationship , and the two second inclined walls are arranged in a diagonal relationship,
The bottom plate is
a first flap connected to a lower edge of the first wall plate;
a second flap connected to a lower edge of the second wall plate;
The first flap includes:
a flap body connected to the lower edge of the first wall plate;
a folded portion connected to a side edge of the flap main body on the first inclined wall side via a first fold line;
The first fold line is formed from the end of the lower edge of the first wall plate on the first inclined wall side to the tip of the first flap,
The folded portion has a first inclined edge disposed along the lower edge of the first inclined wall ,
A second inclined edge is formed on the flap main body along a lower edge of the second inclined wall,
The second flap includes:
a non-jointed part connected to the lower edge of the second wall plate;
a joint part connected to the distal end edge of the non-joint part via a second fold line,
The second fold line is formed from a lower edge of the second wall plate to a side edge of the second flap on the first inclined wall side,
The joint part of the second flap is joined to the folded part of the first flap,
The angle between the lower edge of the first wall plate and the first fold line is set to θ degrees,
The angle between the first polygonal line and the first inclined edge is set to θ+x degrees ,
The angle between the lower edge of the second wall board and the second fold line is set to x/2 degrees,
By folding the first flap along the first fold line and folding the second flap along the second fold line, the body can be folded while maintaining the connection between the first flap and the second flap. A packaging box characterized by :

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