JP2022064641A - Packaging box - Google Patents

Abstract

To provide a packaging box which can be put into a post box, can maintain its shape in a temporarily assembled state, and can suppress decrease in an inside dimension.SOLUTION: A packaging box includes an upper plate 10, a lower plate 20, side plates (a rear side plate 31, a left side plate 32, and a right side plate 33) rising from at least three sides of the lower plate, and a lid part 50 which closes an inlet to a space formed between the upper plate 10 and the lower plate 20. A sealing part 52 for maintaining a closed state of the lid part 50 is formed on an edge part of the lid part 50. Side surface engagement parts 70 for maintaining an engagement state with the upper plate 10 are formed on right and left side plates (the left side plate 32 and the right side plate 33).SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging box that can be posted to a post.

Conventionally, as a packaging box having a size that can be posted to a post, for example, a packaging box disclosed in Patent Document 1 is known. The packaging box of Patent Document 1 includes an upper surface, a lower surface, and left, right, front, and rear side surfaces. This packaging box is configured to maintain its shape in a temporarily assembled state with the front lid open in order to efficiently enclose the contents. For the lid of the packaging box, the overhanging portion extending continuously from the front end of the lower surface is bent so as to cover the front side surface and the front end portion of the upper surface, and the insertion piece at the tip of the overhanging portion is inserted into the upper surface. It is formed by inserting it into a portion and engaging it.

Design Registration No. 1549465 Gazette

By the way, the above-mentioned conventional packaging box is desired to be formed of a thick sheet such as corrugated cardboard for the purpose of improving impact resistance and water wetting resistance at the time of delivery. However, since the opening height of the post-mailing port is limited, the height dimension of the packaging box is also limited. In the packaging box of Patent Document 1, since the sealing portion for fixing the lid is provided on the upper surface, the upper surface and the tip portion of the overhanging portion are doubled. When such a packaging box is made of corrugated cardboard, there is a problem that the internal dimensions are significantly reduced and the amount of packaging is reduced.

Therefore, it is an object of the present invention to provide a packaging box that can be post-mailed, can maintain its shape in a temporarily assembled state, and can suppress a decrease in internal dimensions.

In order to solve the above problems, the present invention provides an entrance to a space formed between an upper plate, a lower plate, a side plate rising from at least three sides of the lower plate, and the upper plate and the lower plate. It is a packaging box provided with a lid to be closed. A sealing portion for maintaining the closed state of the lid portion is formed on the edge portion of the lid portion, and a side engaging portion for maintaining the engaged state with the upper plate is formed on the left and right side plates. Has been done.

According to the packaging box of the present invention, since the sealing portion is formed at the edge portion of the lid portion, even when the packaging box is formed of a thick sheet, post-mailing capable of suppressing a decrease in internal dimensions is possible. It can be a packaging box. Further, since the side engaging portion for maintaining the engaged state between the left and right side plates and the upper plate is provided, the shape of the box can be maintained even in the temporarily assembled state where the lid portion is not sealed.

In the packaging box of the present invention, the lid portion has a double structure including an inner lid and an outer lid, and the tip portion of the inner lid engages with the base end portion of the outer lid. preferable. According to such a configuration, since the lid portion has a double structure, the airtightness and strength of the packaging box can be improved. In addition, it can prevent the inner lid from tipping inward,

The packaging box of the present invention can be post-mailed, can maintain its shape in a temporarily assembled state, and can suppress a decrease in internal dimensions.

It is a perspective view which looked at the main assembly state of the packaging box which concerns on embodiment of this invention from the front upper left. It is a figure which showed the blank sheet of the packaging box which concerns on embodiment of this invention. It is a perspective view which showed the state in the process of assembling the packaging box which concerns on embodiment of this invention. It is a perspective view which looked at the temporary assembly state of the packaging box which concerns on embodiment of this invention from the front upper left.

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

As shown in FIG. 1, the packaging box 1 of the present embodiment includes an upper plate 10, a lower plate 20, and front, rear, left, and right side plates 30 to 33. The packaging box 1 of the present embodiment is made of corrugated cardboard, and has a thickness (height) dimension that can be posted to a post, a front-rear length dimension, and a left-right width dimension. That is, the packaging box 1 has a flat rectangular parallelepiped shape in which the thickness dimension is smaller than the length dimension and the left-right dimension. In the present embodiment, an opening 51 (see FIG. 4) for taking in and out the contents is formed in the front portion of the packaging box 1, and the opening 51 is closed by the lid portion 50. The packaging box 1 is formed with a sealing portion 52 and a front engaging portion 60 for maintaining the closed state of the lid portion 50. Further, the packaging box 1 is formed with side surface engaging portions 70 that maintain an engaged state between the left and right side plates and the upper plate 10.

As shown in FIG. 2, the packaging box 1 is formed by folding a blank sheet S obtained by cutting out a corrugated cardboard sheet into mountain folds or valley folds at each ruled line. The blank sheet S shown in FIG. 2 is arranged so that the outer surface side can be seen.

Each ruled line (folded line) of the blank sheet S is a linear groove (ruled line) formed by pushing the surface of the blank sheet S. A notch may be formed in the ruled line. By doing so, it becomes easy to bend the blank sheet S at the ruled line. In the following description, when distinguishing the front, rear, left, and right side plates, the front side plate 30, the rear side plate 31, the left side plate 32, and the right side plate 33 are used, respectively.

As shown in FIG. 1, the upper plate 10 is a portion constituting the upper surface of the packaging box 1. The upper plate 10 is a quadrangular flat plate. An opening zipper 11 is formed in the vicinity of the rear end portion of the upper plate 10. The opening zipper 11 is a portion to be peeled off when the packaging box 1 is opened, and extends in the left-right direction. The opening zipper 11 is configured by forming two rows of perforated lines in which cuts are intermittently formed at predetermined intervals in the front-rear direction. The spacing and shape of the notches in the opening zipper 11 are not limited to this embodiment.

An inner lid 53 is continuously provided on the front edge of the upper plate 10 via a ruled line. The inner lid 53 is a portion that covers the opening 51 at the front portion of the packaging box 1, and constitutes a part of the lid portion 50. A first engaging hole 54 is formed in the central portion of the ruled line at the base end portion of the inner lid 53. The first engaging hole 54 is a slit-shaped hole (horizontally long hole) in which the first engaging piece 55 of the front side plate 30 to be described later is engaged, and constitutes a part (female side) of the sealing portion 52. are doing. In the state of the blank sheet S, the first engaging hole 54 is formed of a notch formed at the boundary between the upper plate 10 and the inner lid 53. This notch is formed on the inner lid 53 side of the ruled lines located on the left and right sides of the notch. By bending the inner lid 53 downward, the horizontally long first engaging hole 54 opens. A second engaging piece 61 is formed on the tip edge portion (lower end edge portion) of the inner lid 53. The second engaging piece 61 is a portion engaged with the second engaging hole 62 of the front side plate 30 described later, and constitutes a part (male side) of the front engaging portion 60. The second engaging piece 61 is a portion protruding from the intermediate portion of the tip edge portion of the inner lid 53.

Insert pieces 71 are continuously provided on the left edge of the upper plate 10 via a ruled line. The insertion piece 71 is a portion that engages with the insertion hole 72 of the left side plate 32, which will be described later, and constitutes a part (male side) of the left side side engagement portion 70. The insertion piece 71 is bent downward from the left edge portion of the upper plate 10. The insertion piece 71 is formed to have a front-rear length shorter than the front-rear length of the upper plate 10, and is arranged closer to the front of the left side edge portion of the upper plate 10. The tip corner portion of the insertion piece 71 is chamfered so that it can be easily inserted into the insertion hole 72. Insertion pieces 71 are also continuously provided on the right edge of the upper plate 10. The insertion piece 71 on the right side has the same shape as the insertion piece 71 on the left side, and is a portion that engages with the insertion hole 72 of the right side plate 33, which will be described later, and is a part of the side engagement portion 70 on the right side ( (Male side).

The lower plate 20 is a portion constituting the lower surface of the packaging box 1 and is a quadrangular flat plate. Side plates 30 to 33 stand up from the front, rear, left, and right peripheral edges of the lower plate 20, respectively.

The side plates 30 to 33 are portions constituting the side surface of the packaging box 1. In the present embodiment, the side plate 30 constituting the front side surface is referred to as a front side plate 30, the side surface 31 constituting the rear side surface is referred to as a rear side plate 31, and the side plates 32 and 33 constituting the left and right side surfaces are referred to as left side plates, respectively. 32, referred to as the right side plate 33. The front side plate 30, the rear side plate 31, the left side plate 32, and the right side plate 33 are square flat plates, respectively.

The front side plate 30 is continuously provided at the front side edge portion of the lower plate 20 via a ruled line. The front side plate 30 rises at a right angle from the front side edge portion of the lower plate 20. The front side plate 30 is an outer lid that is overlapped on the front side of the inner lid 53, and together with the inner lid 53, constitutes a lid portion 50 that closes the opening 51 at the front portion of the packaging box 1. That is, the lid portion 50 has a double structure including an inner lid 53 and a front side plate 30 serving as an outer lid.

A second engaging hole 62 is formed in the center of the ruled line at the base end of the front plate 30. The second engaging hole 62 is a hole that engages with the second engaging piece 61 of the inner lid 53, and constitutes a part (female side) of the front engaging portion 60. In the state of the blank sheet S, the second engaging hole 62 is formed of a notch formed along the boundary between the lower plate 20 and the front side plate 30. This notch is formed on the lower plate 20 side of the ruled lines located on the left and right sides of the notch. By bending the front side plate 30 upward, the horizontally long second engaging hole 62 is opened. By inserting the second engaging piece 61 of the inner lid 53 into the second engaging hole 62 of the front side plate 30, the tip end portion of the inner lid 53 is engaged with the base end portion of the front side plate 30, and the inner lid 53 is engaged. Is fixed in a state perpendicular to the upper plate 10. That is, the front engaging portion 60 is composed of the second engaging piece 61 and the second engaging hole 62.

A first engaging piece 55 is formed on the tip edge portion (upper end edge portion) of the front side plate 30. The first engaging piece 55 is a portion engaged with the first engaging hole 54 of the inner lid 53, and constitutes a part (male side) of the sealing portion 52. The first engaging piece 55 is continuously provided at the tip edge portion of the front side plate 30 via a ruled line. The first engaging piece 55 is bent rearward from the upper edge portion of the front side plate 30 and is engaged (inserted) into the first engaging hole 54. The corner portion on the tip end side of the first engaging piece 55 is chamfered, and the left-right length of the first engaging piece 55 becomes smaller toward the tip end side. The left-right length of the base end portion of the first engaging piece 55 is larger than the left-right length of the first engaging hole 54. Notches extending in the left-right direction are formed at both left and right ends of the base end portion of the first engaging piece 55. By inserting the first engaging piece 55 of the front side plate 30 into the first engaging hole 54 of the inner lid 53, the tip end portion of the front side plate 30 is engaged with the base end portion of the hanging wall plate 53, and the lid portion. 50 is sealed. That is, the sealing portion 52 is composed of the first engaging piece 55 and the first engaging hole 54. The left and right ends of the base end portion of the first engaging piece 55 are inserted into the first engaging hole 54 and then spread to both left and right sides. That is, the first engaging piece 55 has a structure that does not come off when inserted into the first engaging hole 54, so that the sealed portion 52 cannot be opened once it is sealed.

The rear side plate 31 is continuously provided at the rear side edge portion of the lower plate 20 via a ruled line. The rear side plate 31 is a portion constituting the rear side surface of the packaging box 1, and rises at a right angle from the rear side edge portion of the lower plate 20. An upper plate 10 is continuously provided on the rear edge portion of the rear side plate 31 via a ruled line.

The left side plate 32 is connected to the left side edge of the lower plate 20 via a ruled line. The left side plate 32 is a portion constituting the left side surface of the packaging box 1 and rises at a right angle from the left side edge portion of the lower plate 20. On the upper edge of the left side plate 32, a left inner flap 35 is continuously provided via a ruled line. The left inner flap 35 is a portion overlapped on the lower side of the upper plate 10 and projects from the upper edge portion of the left side plate 32 toward the right side. The left inner flap 35 may be adhered to the lower surface of the upper plate 10. An insertion hole 72 is formed in the ruled line at the base end of the left inner flap 35. An insertion piece 71 formed on the left edge of the upper plate 10 is inserted into the insertion hole 72. The insertion hole 72 constitutes a part (female side) of the left side surface engaging portion 70. In the state of the blank sheet S, the insertion hole 72 is composed of a notch formed along the boundary between the left side plate 32 and the left inner flap 35. By bending the left inner flap 35 to the right, a horizontally long first insertion hole 72 is opened. By inserting the insertion piece 71 of the upper plate 10 into the insertion hole 72 of the left side plate 32, the upper plate 10 and the left side plate 32 are engaged with each other. in short. The insertion piece 71 and the insertion hole 72 form a side surface engaging portion 70.

The right side plate 33 is connected to the right side edge of the lower plate 20 via a ruled line. The right side plate 33 is a portion constituting the right side surface of the packaging box 1, and has a symmetrical shape with the left side plate 32. A right inner flap 36 is continuously provided at the upper end edge of the right side plate 33. The right inner flap 36 has the same shape as the left inner flap 35, and an insertion hole 72 is formed in the ruled line at the base end of the right inner flap 36.

Next, the assembly procedure of the packaging box 1 will be described. When assembling the packaging box 1, as shown in FIG. 3, first, the left side plate 32 is bent upward with respect to the lower plate 20, and then the left inner flap 35 is bent to the right. As a result, the insertion hole 72 is opened on the left side at the base end edge portion of the left inner flap 35. Before and after this start-up step, the right side plate 33 is bent upward with respect to the lower plate 20, and the right inner flap 36 is further bent to the left. As a result, the insertion hole 72 on the right side is opened at the base end edge portion of the inner flap 36 on the right side. After that, the rear side plate 31 is bent with respect to the lower plate 20, and the rear side plate 31 and the upper plate 10 are raised. Before and after this step, the insertion pieces 71 at the left and right side edges of the upper plate 10 are bent at right angles to the upper plate 10.

Further, as shown in FIG. 4, the upper plate 10 is bent forward with respect to the rear side plate 31. At this time, the left and right insertion pieces 71 are inserted into the left and right insertion holes 72. As a result, a pair of left and right side surface engaging portions 70, 70 are formed, and the upper plate 10 engages with the left side plate 32 and the right side plate 33. In this state, the front side plate 30 and the inner lid 53 are not yet bent, and the opening 51 is formed at the front end of the packaging box 1 in a temporarily assembled state. Even in the temporarily assembled state, the upper plate 10 and the left side plate 32 and the right side plate 33 are fixed by the side engaging portion 70 including the insertion piece 71 and the insertion hole 72, so that the shape of the packaging box 1 is maintained. Can be done. That is, even in the temporarily assembled state, the packaging box 1 is not easily deformed, so that the contents can be efficiently enclosed.

When the filling work of the contents is completed, the sealing work of the lid portion 50 is performed. In order to seal the lid portion 50, first, the inner lid 53 of the front side edge portion of the upper plate 10 is bent downward. As a result, the first engaging hole 54 is formed at the base end portion of the inner lid 53. After that, the front side plate 30 of the front end edge portion of the lower plate 20 is bent upward at a position in front of the inner lid 53. As a result, the second engaging hole 62 is formed at the base end portion of the front side plate 30. The second engaging piece 61 of the inner plate 53 is inserted into the second engaging hole 62. Further, the first engaging piece 55 of the front side plate 30 is bent rearward and inserted into the first engaging hole 54 (see FIG. 1). As a result, the double-structured lid portion 50 is formed. That is, the upper end portion of the front side plate 30 is fixed to the base end portion of the inner lid 53 by the sealing portion 52, and the lower end portion of the inner lid 53 is fixed to the base end portion of the front side plate 30 by the front engaging portion 60.

Due to the structure of the sealing portion 52, the packaging box 1 of the present embodiment cannot open the lid portion 50 once it is sealed. The opening after sealing is performed by breaking the opening zipper 11 formed on the upper plate 10.

In the packaging box 1 according to the present embodiment, since the sealing portion 52 is formed on the front side plate 30 which is the outer lid and the inner lid 53, the first engaging piece 55 is inserted so that the corrugated cardboard overlaps in the vertical direction. Only the part. Therefore, even when the packaging box 1 is formed of a thick sheet, the decrease in internal dimensions can be suppressed to a minimum, so that a large storage volume can be obtained in the packaging box 1 having a size that allows post-mailing. Can be secured.

Further, since the lid portion 50 has a double structure including an inner lid 53 and a front side plate 30 (outer lid), the airtightness and strength of the packaging box 1 can be improved. Further, since the upper and lower parts of the lid portion 50 are fixed by the sealing portion 52 and the front engaging portion 60, the lid portion 50 is difficult to come off. Further, since the inner lid 53 can be held in a vertical state, the inner lid 53 is less likely to break inward and is less likely to interfere with the contents.

Further, by engaging the left and right side surface engaging portions 70, 70, the shape can be maintained in a temporarily assembled state without sealing the lid portion 50, so that the filling work of the contents can be efficiently performed. ..

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be appropriately modified without departing from the spirit of the present invention. For example, in the above embodiment, the lid portion 50 has a double structure including a front side plate 30 (outer lid) and an inner lid 53, but the lid portion 50 is not limited thereto. It may be a single lid portion provided with the front side plate 30. Even in this case, if the lid portion is fixed by the sealing portion provided on the front side plate, it is possible to obtain a post-mailable packaging box capable of suppressing a decrease in internal dimensions to a minimum.

1 Packaging box 10 Upper plate 20 Lower plate 30 Front side plate (outer lid)
31 Rear side plate 32 Left side plate 33 Right side plate 50 Lid 52 Sealed part 53 Inner lid 54 First engagement hole 55 First engagement piece 60 Front engagement part 61 Second engagement piece 62 Second engagement hole 70 Side engagement Joint part 71 Insert piece 72 Insert hole

Claims (2)

In a packaging box provided with an upper plate, a lower plate, side plates rising from at least three sides of the lower plate, and a lid portion that closes an entrance to a space formed between the upper plate and the lower plate. ,
A sealing portion that maintains the closed state of the lid portion is formed on the edge portion of the lid portion.
A packaging box characterized in that the left and right side plates are formed with side engaging portions that maintain an engaged state with the upper plate. The packaging box according to claim 1.
The packaging box has a double structure including an inner lid and an outer lid, and the tip end portion of the inner lid is engaged with the base end portion of the outer lid.

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