JP7292935B2 - packaging box - Google Patents

Description

The present invention relates to a packaging box having an octagonal body.

BACKGROUND ART Conventionally, a paper packaging box is known that includes an octagonal cylinder-shaped body, and top and bottom parts that close openings at the upper and lower ends of the body, respectively (see Patent Document 1).

In this packaging box, the body includes a pair of first side plates that face each other, a second side plate that faces in a direction that intersects the direction in which the first side plates face each other, and the first side plate and the second side plate. It has four connecting side plates to be connected, and the top and bottom portions are composed of a pair of hexagonal outer flaps connected from the first side plate via the first folding line, and a second folding from the second side plate. It is composed of a pair of square-shaped inner flaps that are connected via a line of sight.

As a result, this packaging box can be obtained by folding the inner flap horizontally toward the inside of the packaging box, folding the outer flap horizontally so as to overlap the inner flap, and abutting both leading edges. The openings at the upper and lower ends of the portion can be closed.

Registered Utility Model No. 3211269

However, in the packaging box of Patent Document 1, the side edge of the folded inner flap is separated from the inner surface of the first side plate and cannot be supported by the first side plate. It is inconvenient that it is difficult to maintain the square shape and position the tip edges of the two outer flaps against each other.

In view of the above points, an object of the present invention is to provide a packaging box with improved formability during box making.

In order to achieve such an object, a first packaging box of the present invention is a paper packaging box comprising a polygonal tube-shaped body and a closing part for closing an end opening of the body, The body has a pair of first side plates that face each other, a second side plate that faces in a direction that intersects the direction in which the first side plates face each other, and a connecting side plate that connects the first side plates and the second side plates. The closing portion includes at least a pair of outer flaps connected from the first side plate via a first fold line, and the connection side plate is configured to extend from the end on the closing portion side to the adjacent first flap. It is characterized by having an extension part extending beyond the first fold line and against which a side edge of the outer flap abuts when the outer flap is folded horizontally toward the inside of the packaging box. and

According to the first packaging box of the present invention, the side edge of the outer flap connected to the first side plate abuts against the inner surface of the extension provided at the end of the connecting side plate to position the box. Since it can be boxed, the formability can be improved.

A second packaging box of the present invention is a paper packaging box comprising a square tube-shaped body and a closing part for closing an end opening of the body, wherein the body comprises a pair of opposing It has a first side plate and a second side plate facing each other in a direction intersecting the direction in which the first side plates face each other, and the closing portion is a pair continuously provided from the first side plate via a first fold line. and a pair of inner flaps connected from the second side plate via a second fold line, and the second side plate has both ends at the boundary with the inner flap. It is formed by a cut connected to a second fold line and bent or curved toward the inner flap side, and when the second side plate is folded horizontally toward the inside of the packaging box, the Projections are provided that are separated from the cuts and extend from the end of the second side plate. recesses that fit into the protrusions when bent inward in the horizontal direction are provided.

According to the second packaging box of the present invention, the concave portion of the outer flap connected to the first side plate fits into the convex portion extending from the edge of the second side plate, so that the outer flap can be positioned. Therefore, it is possible to improve the formability during box making.

Further, in the second packaging box, the recesses are formed by notching leading end corners of both outer flaps, bending the outer flaps in the horizontal direction toward the inside of the packaging box, and abutting the leading edge edges thereof. It is characterized by being formed by

According to the second packaging box having this configuration, the pair of outer flaps can be supported by being fitted to the protrusions with their tip edges facing each other, so that the moldability can be further improved. .

A third packaging box of the present invention is a paper packaging box comprising an octagonal body and a top and a bottom that close an end opening of the body, wherein the bodies are a pair of opposing a first side plate, a second side plate facing in a direction intersecting the direction in which the first side plate faces, and four connecting side plates connecting the first side plate and the second side plate, wherein the top The portion or the bottom portion is formed by a pair of outer flaps connected from the first side plate via a first fold line and a pair of inner flaps connected from the second side plate via a second fold line. The connecting side plate extends beyond the adjacent first fold line from the end thereof, and when the outer flap is folded horizontally toward the inside of the packaging box, the connecting side plate extends to the outer side. The second side plate has an extension portion against which the side edge of the flap abuts, and the second side plate has both ends connected to the second fold line and bent toward the inner flap side at the boundary with the inner flap. Also, a projection is formed by a curved cut, and is released from the cut and extends from the end of the second side plate when the second side plate is horizontally bent toward the inside of the packaging box. A portion is provided in the outer flap, and is formed by cutting out a part of the side edge of the outer flap, and when the outer flap is folded horizontally inward of the packaging box, the convex portion It is characterized by providing a concave portion that fits with.

Since the third packaging box of the present invention has the extension part of the first packaging box and the convex part and the concave part of the second packaging box, it is easier to position the outer flap during box making. Therefore, moldability can be further improved.

The perspective view which shows the packaging box of embodiment of this invention. Explanatory drawing which shows the expanded state before assembly of the packaging box of this embodiment. FIG. 4 is an explanatory diagram showing the assembly process of the packaging box of the present embodiment, and is a perspective view before both flaps are folded. FIG. 4 is an explanatory diagram showing the assembly process of the packaging box of the present embodiment, and is a perspective view when the inner flap is folded. FIG. 4 is an explanatory diagram showing the assembly process of the packaging box of the present embodiment, and is a perspective view when the outer flap is folded.

As shown in FIG. 1, the packaging box 1 of this embodiment has an octagonal body 2, a top 3 that closes the upper end opening of the body 2, and a lower end opening of the body 2 that is closed. It is formed by a bottom portion 4 that Note that the top portion 3 and the bottom portion 4 correspond to the closing portion of the present invention.

The packaging box 1 is assembled from stamped formed corrugated paperboard 10 as shown in FIG.

The corrugated board 10 has a pair of first side plates 21 and a pair of second side plates 22 alternately connected via four connecting side plates 23 . Specifically, the first side plate 21 and the connecting side plate 23 are connected via the trunk fold line a, and the second side plate 22 and the connecting side plate 23 are connected via the trunk fold line a. . Further, an adhesive piece 23 is connected to the edge of the connecting side plate 23 at the left end via a folding line c.

Outer flaps 31 are connected to upper and lower edges of each of the first side plates 21 via first fold lines d. Further, inner flaps 32 are continuously provided at the upper and lower edges of each of the second side plates 22 via the second folding lines e.

The outer flap 31 is formed in a substantially hexagonal shape obtained by halving an octagon in plan view of the body portion 2 along the longitudinal direction. Specifically, in the direction away from the first crease line d, the first crease line d is a rectangular base end portion 31a having the same length in the left and right direction, and at about 45° from the tip of the base end portion 31a. It consists of an inverted trapezoidal tapered portion 31b that gradually widens, and a substantially rectangular widened portion 31c that extends from the tip of the tapered portion 31b along the trunk fold line a.

Furthermore, a notch 71 is formed by cutting an L-shaped notch 71 along the side edge of the tip side corner of the wide portion 31c of the outer flap 31 .

The upper end of the connecting side plate 23 is formed with an extending portion 50 extending upward from the first folding line d and the second folding line e sandwiching the upper end. The extending portion 50 is separated from the outer flap 31 by a cut 51 extending along the boundary with the base end portion 31a of the outer flap 31 . In addition, the end edge of the extension portion 50 on the inner flap 32 side extends in the width direction until it exceeds the trunk folding line a, and then bends 90 ° and connects to the second folding line e L-shaped cut 52 is separated from the inner flap 32 by

Similarly, a similar extending portion 50 is formed on the lower end portion of the connecting side plate 23 as well.

The length of the extending portion 50 in the left-right direction substantially matches the length of the side edge of the tapered portion 31b.

At the boundary between the second side plate 22 and the inner flap 32, an inverted U-shaped cut 61 projecting toward the inner flap 32 is formed in the center, and a pair of cuts 52, 52 connecting both ends of the cut 61 and the adjacent cuts 52, 52 is formed. are formed with second fold lines e, e.

The length of the cut line 61 in the left-right direction is approximately equal to twice the length of the notch 71 in the up-down direction, and the length of the second fold line e is the length of the notch in the up-down direction of the wide portion 31c. It approximately matches the length obtained by subtracting the vertical length of 71 .

Next, the work of assembling the packaging box 1 from the corrugated board 10 will be described.

First, the first side plate 21, the second side plate 22, and the connecting side plate 23 are sequentially folded at approximately 135° along the trunk fold lines a and b, and then the adhesive piece 23 is adhered to the left end of the second side plate 22. By doing so, the body portion 2 is formed as shown in FIG.

Next, the bottom portion 4 is formed. Since the bottom portion 4 and the top portion 3 have the same structure in this embodiment, the steps of forming the top portion 3 will be described below as an example, which are the same steps. A description of the process of forming the bottom portion 4 is omitted.

First, as shown in FIG. 4, each inner flap 32 is folded inward along the second folding line e so as to be perpendicular to the second side plate 22 . As a result, the protrusion 60 is separated from the cut 61 and extends from the upper end of the second side plate 22 . At the same time, one side edge of the extending portion 50 , which will be described later, is also released from the cut 52 .

Next, each outer flap 31 is folded inward along the first fold line d so as to be perpendicular to the first side plate 21 and overlapped with the outer surface of the inner flap 32 . As a result, the other edge of the extending portion 50 is released from the cut 51 and extends from the upper edge of the connecting side plate 23 .

As described above, the top portion 3 is formed, and the upper end opening of the body portion 2 is closed. In addition, as described above, prior to forming the top portion 3, the bottom portion 4 is formed by the same process as the formation of the top portion 3, and contents are accommodated therein.

According to the packaging box 1 described above, when the outer flap 31 is folded and overlapped with the inner flap 32, the side edge of the tapered portion 31b of the outer flap 31 is engaged with the inner surface of the extending portion 50. .

In addition, by abutting the tip edges of both outer flaps 31, the recesses 70 are formed by combining the notches 71 of the wide portions 31c. The concave portion 70 is fitted into the convex portion 60 . Conversely, the side edge portion of the wide portion 31c closer to the base end than the notch 71 rides on the upper edge of the second side plate 22 and fits between the extension portion 50 and the projection portion 60 .

Therefore, the packaging box 1 can be assembled while positioning the outer flaps 31 by the extending portions 50 and the convex portions 60, thereby improving moldability and workability.

Further, since the outer flap 31 is positioned by the extending portion 50 and the convex portion 60, it is possible to reduce the gap between the top portion 3 and the bottom portion 4 and the trunk portion.

Modifications of this embodiment will be described below.

In this embodiment, the packaging box 1 made of corrugated cardboard was described as an example, but the present invention is not limited to this, and the packaging box 1 may be made of paper such as cardboard.

In the present embodiment, the packaging box having both the extending portion 50 and the convex portion 60 is described as an example, but only one of the extending portion 50 and the convex portion 60 may be provided. In addition, in order to provide the convex part 60, the trunk|drum should just be a polygonal cylinder shape more than a square. On the other hand, in order to provide the extending portion 50, it is sufficient that the trunk portion has a polygonal tubular shape with a pentagon or more. And when providing only the extension part 50, an inner flap can also be abbreviate|omitted.

In this embodiment, the packaging box 1 having an extension and a projection on both the top part 3 and the bottom part 4 has been described as an example, but the packaging box only needs to have an extension or a projection on one of them. . Furthermore, the top part 3 can be omitted.

In this embodiment, L-shaped cutouts 71 formed in the pair of outer flaps 31 are combined with a convex portion 60 provided on one side edge of one of the second side plates 22 . However, for example, two convex portions are provided at equal intervals on the upper edge of one second side plate 22, and the center of the side edge of the wide portion 31c of each outer flap 31 is provided. may be cut in an inverted U-shape to form recesses, and each outer flap 31 may be fitted into the projections.

In the present embodiment, the extending portion 50 having a width larger than the width of the connecting side plate has been described as an example, but the present invention is not limited to this, and the width of the extending portion may be equal to or less than the width of the connecting plate.

1 Packaging box 2 Body part 21 First side plate 22 Second side plate 23 Connection side plate 3 Top part (closure part)
31 Outer flap 32 Inner flap 4 Bottom (blocking part)
50 extending portion 60 convex portion 61 cut 70 concave portion d first fold line e second fold line

Claims (4)

A paper packaging box comprising a polygonal tube-shaped body and a closing part that closes an end opening of the body,
The body includes a pair of first side plates facing each other, a second side plate facing each other in a direction intersecting the direction in which the first side plates face each other, and a connecting side plate connecting the first side plates and the second side plates. have
The closing portion includes at least a pair of outer flaps connected from the first side plate via a first fold line,
The connecting side plate extends beyond the adjacent first fold line from the end on the closing portion side, and when the outer flap is folded horizontally toward the inside of the packaging box, the outer flap is folded inward. A packaging box characterized by having an extending portion against which a side edge of a flap abuts. A paper packaging box comprising a rectangular tube-shaped body and a closing part that closes an end opening of the body,
The body has a pair of first side plates facing each other and a second side plate facing each other in a direction intersecting the direction in which the first side plates face each other,
The closing portion includes a pair of outer flaps connected from the first side plate via a first fold line, and a pair of inner flaps connected from the second side plate via a second fold line. consists of
Both ends of the second side plate are connected to the second crease line at the boundary with the inner flap, and the second side plate is formed by a cut that is bent or curved toward the inner flap side, and the second side plate is the When the packaging box is folded horizontally toward the inside of the packaging box, each protrusion is provided so as to be separated from the cut and extend from the end of the second side plate,
A concave portion is formed in the outer flap by cutting out a part of the side edge thereof, and the concave portion fits into the convex portion when the outer flap is horizontally folded toward the inside of the packaging box. are provided respectively. The packaging box according to claim 2,
The recesses are formed by notching tip corners of both outer flaps, bending the outer flaps in the horizontal direction toward the inside of the packaging box, and abutting the tip edges thereof. packaging box. A paper packaging box having an octagonal body and a top and a bottom that close an end opening of the body,
The body includes a pair of first side plates facing each other, a second side plate facing each other in a direction intersecting the direction in which the first side plates face each other, and four plates connecting the first side plates and the second side plates. having connecting side plates,
The top portion or the bottom portion includes a pair of outer flaps connected from the first side plate via a first fold line, and a pair of inner flaps connected from the second side plate via a second fold line. and
The connecting side plate extends beyond the adjacent first fold line from the end portion thereof, and when the outer flap is folded horizontally toward the inside of the packaging box, the connecting side plate extends from the side of the outer flap. having an extension against which the edge is abutted;
Both ends of the second side plate are connected to the second crease line at the boundary with the inner flap, and the second side plate is formed by a cut that is bent or curved toward the inner flap side, and the second side plate is the a convex portion is provided that is released from the cut and extends from an end portion of the second side plate when the packaging box is horizontally folded toward the inside of the packaging box;
A concave portion is formed in the outer flap by cutting out a part of the side edge thereof, and the concave portion fits into the convex portion when the outer flap is horizontally folded toward the inside of the packaging box. A packaging box characterized in that it is provided with

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