JP2023034407A - packaging box - Google Patents

Abstract

To provide a packaging box which can automatically assemble the bottom plate in a flat manner by opening a folded trunk part in which respective flaps of a bottom plate are connected in an insertion manner.SOLUTION: In a packaging box 1, a trunk part 10 includes first wall plates 11, 12, and second wall plates 13, 14 adjacent to the first wall plates 11, 12. A bottom plate 30 includes first flaps 40 provided continuous to the first wall plates 11, 12, and second flaps 50 provided continuous to the second wall plates 13, 14. The first flap 40 is formed with a folding part 42 provided continuous to a flap body 41 via a folding line L1, and a connection slit 44 is formed in a folding line L1. The second flap 50 is provided with a connection part 51 overlapping an outer surface of the folding part 42, and an insertion piece 52 formed at the connection part 51 is inserted in the connection slit 44.SELECTED DRAWING: Figure 1

Description

The present invention relates to packaging boxes.

A corrugated cardboard packaging box includes a first flap connected to a first wall plate of a body and a second flap connected to a second wall plate adjacent to the first wall plate. Among such packaging boxes, in a packaging box in which the bottom plate is automatically assembled by opening the body, the flap body and the folded portion are formed in the first flap, and the folded portion is formed on the outer surface (lower surface) of the second flap. are superimposed.
In such a packaging box, the first flap and the second flap are connected by forming an insertion piece in the flap main body of the first flap and inserting this insertion piece into the connection hole of the second flap. (See, for example, Patent Document 1).

In the packaging box described above, when the body portion is folded while the first flap and the second flap are inserted into the body portion, the flap main body and the folded portion of the first flap are folded, and the first flap and the second flap are folded. It fits inside the body in a state where the two overlap each other.
Further, as the folded torso is opened into a cylindrical shape, the flap main body and the folded portion of the first flap are opened, and the first and second flaps are unfolded within the torso to form a bottom plate. .

Japanese Patent No. 3600986

In the above-described conventional packaging box, the inner surface (upper surface) of the folded portion of the first flap is not attached to the outer surface (lower surface) of the second flap. There is a problem that it will be in a floating state on the lower side).

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems and to provide a packaging box in which the flaps of the bottom plate are connected by an insertion method, and the bottom plate can be automatically assembled flat by opening the folded body. and

In order to solve the above problems, the present invention provides a packaging box comprising a cylindrical body and a bottom plate provided at an opening on the lower side of the body. The body has a first wall plate and a second wall plate adjacent to the first wall plate. The bottom plate includes a first flap connected to the lower edge of the first wall plate and a second flap connected to the lower edge of the second wall plate. The first flap includes a flap body connected to the lower edge of the first wall plate, and a folded portion connected to the edge of the flap body on the second wall plate side via a broken line. , are formed. A connection hole is formed along the fold line of the first flap, and the second flap is provided with a connection portion superimposed on the outer surface of the folded portion. An insertion piece formed at the edge of the connecting portion is inserted into the connecting hole.

When folding the packaging box of the present invention, the second flap is superimposed on the outer surface of the folded portion of the first flap, and the first flap and the second flap are inserted into the body while the body is folded to form the first flap. is bent into a valley fold when viewed from the outside at the polygonal line.
At this time, the first flap and the second flap are connected by inserting the insertion piece of the second flap sandwiched between the flap body and the folded portion of the first flap into the connection hole of the first flap. be.

When a folded packaging box is assembled into a box shape, the body is opened in a cylindrical shape. , so the bottom plate can be assembled automatically.
At this time, the connection between the first flap and the second flap is maintained by the insertion piece and the connection hole. Then, when the bottom plate is assembled, the folded portion of the first flap overlaps the inner surface of the second flap. Thereby, the outer surface of the bottom plate can be formed flat.

When the trunk is folded, the insertion piece of the second flap is inserted into the connection hole of the first flap from the corner on the second wall plate side. Therefore, by forming an inclined edge at the corner of the second wall plate at the tip of the insertion piece, the insertion piece can be smoothly inserted into the connecting hole.

In the packaging box of the present invention, the flaps of the bottom plate are easily connected so that the bottom plate can be automatically assembled by opening the body without bonding the flaps of the bottom plate together with an adhesive. When assembled, the outer surface of the bottom plate can be formed flat.

It is the perspective view which looked at the packaging box which concerns on embodiment of this invention from the front lower right. It is the figure which showed the blank sheet of the packaging box which concerns on embodiment of this invention. It is the bottom view which showed the packaging box which concerns on embodiment of this invention. It is the figure which looked at the aspect which folds the packaging box which concerns on embodiment of this invention from the downward direction.

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 describing the packaging box of the present embodiment, and do not limit the configuration or usage of the packaging box.

As shown in FIG. 1, the packaging box 1 of the present embodiment includes a body 10 formed in a square rectangular tube shape, a top plate 20 provided at the upper opening of the body 10, and a body 10. and a bottom plate 30 provided in the lower opening.

As shown in FIG. 2, 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 corrugated cardboard sheet. The blank sheet S shown in FIG. 2 is arranged so that the inner side can be seen.
The fold lines of the blank sheet S are ruled lines (pressed lines) formed by pressing the surface of the blank sheet S linearly. In addition, you may form an intermittent notch in a ruled line. By doing so, it becomes easier to fold the blank sheet S along the folding line.
Alternatively, the folded line may be configured by intermittently forming half-cut cuts obtained by cutting only the surface of the sheet or cuts penetrating the sheet into a linear shape.

As shown in FIG. 1 , the body 10 includes a pair of front and rear first wall plates 11 and 12 and a pair of left and right second wall plates 13 and 14 . The first wall plates 11, 12 and the second wall plates 13, 14 are formed in a quadrangular shape. The first wall plates 11, 12 and the second wall plates 13, 14 are vertically connected via a broken line. Square openings are formed in the upper and lower surfaces of the body 10 .

As shown in FIG. 2, the top plate 20 includes a pair of front and rear end flaps 21, 21 connected to the upper edges of the front and rear first wall plates 11, 12, and a pair of left and right second wall plates 13, 14. It is composed of a pair of left and right side flaps 22, 22 connected to the upper edge. In this embodiment, the central portion of the top plate 20 is open.

The bottom plate 30, as shown in FIG. Left and right second flaps 50, 50 connected to the edge are provided. The bottom plate 30 closes the entire lower opening of the body 10 .

The first flap 40 on the front side is formed with a flap body 41 connected to the lower edge of the first wall plate 11 on the front side, and a folded portion 42 connected to the right edge of the flap body 41. ing. The front first flap 40 is arranged in front of the lower opening of the trunk 10 .

The front edge of the flap body 41 is connected to the lower edge of the first wall plate 11 on the front side via a broken line. As shown in FIG. 3, the flap body 41 is formed in a triangular shape so that the width in the left-right direction decreases from the front edge toward the rear end.

A folded portion 42 is connected to the right edge of the flap body 41 (the side edge on the right second wall plate 14 side) via a broken line L1. A fold line L1 is a ruled line formed on the outer surface (lower surface) of the first flap 40 . The polygonal line L1 extends obliquely rearward to the left from the right end of the lower edge of the first wall plate 11 on the front side.

The folded portion 42 is formed by a rear edge parallel to the lower edge of the first wall plate 11 on the front side, a right edge along the lower edge of the second wall plate 14 on the right side, and a fold line L1. It is formed as an enclosed triangle (see FIG. 2).
As shown in FIG. 2, the folded portion 42 is formed with a protruding portion 43 that protrudes toward the flap body 41 from the folding line L1. The projecting portion 43 is separated from the flap body 41 by the slit L2. The projecting portion 43 is formed in the intermediate portion of the polygonal line L1.

As shown in FIG. 4, when the folded portion 42 is bent outward with respect to the flap body 41 along the fold line L1, the slit L2 is cut open to form the connecting hole 44. As shown in FIG. As a result, the connecting hole 44 is opened along the intermediate portion of the polygonal line L1.

As shown in FIG. 3, the right edge of the right second flap 50 is connected to the lower edge of the right second wall plate 14 via a broken line. The right second flap 50 is arranged in the right half of the lower opening of the torso 10 .

The front portion of the second flap 50 on the right side is formed with a connecting portion 51 overlapping the outer surface (lower surface) of the folded portion 42 of the first flap 40 on the front side (see FIG. 1).
The front edge portion L3 of the connecting portion 51 extends obliquely rearward to the left from the right end portion of the lower edge portion of the first wall plate 11 on the front side. A front edge portion L3 of the connecting portion 51 is arranged parallel to the fold line L1 of the first flap 40 on the front side.

An insertion piece 52 protrudes from an intermediate portion of the front edge portion L3 of the connecting portion 51 . The width of the insertion piece 52 is formed to be the same as or slightly smaller than the width of the connecting hole 44 .
The insertion piece 52 is inserted into the connecting hole 44 of the first flap 40 on the front side from the outside (lower side). Thereby, the first flap 40 on the front side and the second flap 50 on the right side are connected.
In this embodiment, as shown in FIG. 1 , the folded portion 42 of the first flap 40 on the front side overlaps the inner surface (upper surface) of the connecting portion 51 of the second flap 50 . That is, the folded portion 42 of the first flap 40 on the front side enters the inner surface side of the second flap 50 .

As shown in FIG. 3, an inclined edge portion L4 is formed at a corner portion of the tip portion of the insertion piece 52 on the right side of the second wall plate 14 side. That is, the tip portion of the insertion piece 52 has a shape in which the corner portion on the right side of the second wall plate 14 is notched. The insertion piece 52 is formed so that the width of the tip portion is smaller than that of the base portion.

The rear first flap 40 is connected to the lower edge of the rear first wall plate 12 . The first flap 40 on the rear side is formed point-symmetrically with the first flap 40 on the front side with the central portion of the body portion 10 as a point of symmetry.
The left second flap 50 is connected to the lower edge of the left second wall plate 13 . The second flap 50 on the left side is formed point-symmetrically with the second flap 50 on the right side with the central portion of the body portion 10 as a point of symmetry.
The insertion piece 52 of the left second flap 50 is inserted into the connecting hole 44 of the rear first flap 40, and the rear first flap 40 and the left second flap 50 are connected. .

The first flap 40 and the second flap 50 are connected, and the tips of the left and right second flaps 50, 50 are engaged with each other to form the bottom plate 30, which is the lower opening of the body 10. is blocked.

When assembling the packaging box 1 of this embodiment, as shown in FIG. Get inside 10.
Further, the folded portion 42 of the flap main body 41 of the first flap 40 is folded outward along the folding line L1. In this manner, the first flap 40 is folded in a valley fold when viewed from the outside.

Subsequently, the left and right second flaps 50 , 50 are folded inside the trunk portion 10 and inserted into the trunk portion 10 . At this time, the connecting portion 51 of the second flap 50 is inserted between the flap main body 41 and the folded portion 42 of the first flap 40 .

As the trunk portion 10 is folded, the connection portion 51 of the second flap 50 is sandwiched between the flap main body 41 and the folded portion 42 of the first flap 40, and the insertion piece 52 of the second flap 50 is folded into the first flap. It is inserted into the connecting hole 44 of 40 . As described above, when the body portion 10 is folded, the first flap 40 and the second flap 50 are automatically connected.

The inserting piece 52 of the second flap 50 is inserted into the connecting hole 44 of the first flap 40 from the corners of the second wall plates 13 and 14 . At the tip of the insertion piece 52 , the inclined edge portion L<b>4 is formed at the corner on the side of the second wall plates 13 and 14 , so that the insertion piece 52 can be smoothly inserted into the connecting hole 44 .

In order to assemble the folded packaging box 1 into a box shape, as shown in FIG. 3, the first flap 40 and the second flap 50 are tilted downward as the body 10 is opened into a cylindrical shape. . At this time, as the first flap 40 tilts downward, the flap main body 41 and the folded portion 42 are opened. Also, the insertion piece 52 of the second flap 50 is kept inserted into the connecting hole 44 of the first flap 40 .
In this manner, the front and rear first flaps 40 and 40 and the left and right second flaps 50 and 50 are unfolded to the lower opening of the trunk section 10, so that the bottom plate 30 is automatically assembled.

In the packaging box 1 as described above, when the body portion 10 is folded, the first flap 40 and the second flap 50 are connected, and when the folded body portion 10 is opened, the first flap 40 and the second flap 50 is maintained.
As described above, in the packaging box 1 of the present embodiment, the bottom plate 30 can be automatically assembled by opening the body portion 10 without bonding the first flap 40 and the second flap 50 together with an adhesive. , the first flap 40 and the second flap 50 of the bottom plate 30 are easily connected.

In the packaging box 1 of the present embodiment, when the bottom plate 30 is assembled, the folded portion 42 of the first flap 40 overlaps the inner surface of the second flap 50, so the outer surface (lower surface) of the bottom plate 30 can be formed flat. can.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be appropriately modified without departing from the scope of the invention.
In the packaging box 1 of this embodiment, as shown in FIG. 3, the second flap 50 is formed with one insertion piece 52. The insert piece 52 may be connected to one or more connecting holes 44 of one flap 40 .

As shown in FIG. 1, the body portion 10 of the packaging box 1 of the present embodiment is formed into a quadrangular shape by front and rear first wall plates 11 and 12 and left and right second wall plates 13 and 14. The shape of 10 is not limited, and for example, an inclined wall may be formed between the first wall plate and the second wall plate.

In the packaging box 1 of the present embodiment, the top plate 20 is provided in the upper opening of the body portion 10, but the configuration of the top plate 20 is not limited. Moreover, the top plate 20 may not be provided on the packaging box 1. - 特許庁

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

1 packaging box 10 body 11 front first wall plate 12 rear first wall plate 13 left second wall plate 14 right second wall plate 20 top plate 21 end flap 22 side flap 30 bottom plate 40 first Flap 41 Flap body 42 Folding part 43 Protruding part 44 Connecting hole 50 Second flap 51 Connecting part 52 Insertion piece L1 Folding line L2 Slit L3 Front edge L4 Inclined edge S Blank sheet

Claims (2)

a cylindrical torso;
a bottom plate provided in the opening on the lower side of the body,
The body has a first wall plate and a second wall plate adjacent to the first wall plate,
The bottom plate is
a first flap connected to the lower edge of the first wall plate;
a second flap connected to the 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 the edge of the flap body on the side of the second wall plate via a fold line,
A connecting hole is formed along the fold line,
In the second flap,
A connecting portion superimposed on the outer surface of the folded portion is provided,
A packaging box, wherein an insertion piece formed at the edge of the connecting portion is inserted into the connecting hole. A packaging box according to claim 1,
A packaging box, wherein an inclined edge is formed at a corner on the second wall plate side of the tip of the insertion piece.

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