JP3100554U - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box having high efficiency of opening and closing operations.
SOLUTION: An upper lid portion 10 of a packaging box 1 is composed of first to fourth upper flaps Fo1 to Fo4. Then, in this packaging box 1, each of the first to fourth upper flaps Fo1 to Fo4 which are adjacent to each other is bent in the order of Fo1 to Fo4, and the fourth upper flap Fo4 overlaps the first upper flap Fo1. Into the packaging box 1 rather than the first upper flap Fo1, the upper lid portion 10 is formed. In particular, a fold T1 is formed in the first upper flap Fo1, and the fourth upper flap Fo4 is The angle θA formed by the side L9 on the first upper flap Fo1 side and the upper side Lo1 of the first side wall portion S1 is an acute angle, and the angle θB formed by the fold T1 and the upper side Lo1 of the first side wall portion is subtracted from 90 degrees. Is larger than the angle. For this reason, opening and sealing operations can be easily performed.
[Selection diagram] Fig. 1

Description

(4) The present invention relates to a packaging box.

2. Description of the Related Art Conventionally, a substantially rectangular cardboard packaging box having four rectangular side walls, a bottom, and an upper lid has been known, and the upper lid has four upper sides connected to respective upper sides of the four side walls. It is formed by flaps.

The following are examples of this type of packaging box.
(1) First, a packaging box in which four upper flaps are formed in a rectangular shape, and each of the upper flaps is folded in a clockwise or counterclockwise order in the middle direction of the box at each upper side of the side wall portion. In addition, the upper lid portion is formed by inserting the square portion overlapping the first folded upper flap into the inside of the box more than the first folded upper flap at the last folded upper flap. Is known.
(2) Also, of the four upper flaps, each of a pair of upper flaps facing each other is provided with a pair of band-like engaging pieces, and the above-mentioned engaging pieces are provided on each of the other set of upper flaps. Some packaging boxes are provided with slits to be inserted. That is, in this packaging box, each of the pair of upper flaps facing each other is not rectangular, but has a shape in which band-shaped engagement pieces are protruded from near both ends of the side opposite to the upper side of the side wall. Further, each of the other pair of upper flaps is provided with two rectangular slits which are perpendicular to the upper side of the side wall to which the upper flap is connected. Then, in this packaging box, first, the upper flap provided with the slit is bent toward the middle side of the box at the upper side of the side wall portion. Next, the upper flap provided with the engagement piece is similarly bent, and each of the engagement pieces provided on each of the upper flaps is engaged with one of the slits of the upper flap which has been bent earlier. An upper lid is configured by being inserted into slits corresponding to the pieces, respectively (for example, JP-A-2001-18952).

However, in the packaging box of the above (1), when the upper flap to be folded last is inserted into the inside of the box rather than the upper flap to be folded first, the overlapping portion of the upper flaps may be bent unexpectedly. There is a risk of being torn. Therefore, there is a problem that the sealing operation needs to be performed carefully, and the operation is troublesome. Further, there is a similar problem when opening the package.

On the other hand, in the packaging box of the above (2), when performing the sealing operation, the pair of engaging pieces protruding from each of the two upper flaps must be carefully and consciously inserted into the slits of the other upper flaps. Therefore, the sealing work also takes time. Also, when performing the opening operation, it is necessary to carefully pull out the engagement pieces from the slits, which is troublesome.

The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a packaging box having higher opening and closing operations than conventional products.

The packaging box according to claim 1 for achieving the above object is a box having a substantially rectangular parallelepiped shape including first to fourth rectangular side walls, a bottom, and a top cover. In this packaging box, the upper lid is formed by the first to fourth upper flaps connected to the upper sides of the first to fourth side walls. Further, each of the first to fourth upper flaps in the adjacent positional relationship is clockwise or counterclockwise, and in the middle direction of the packaging box at each upper side of the first to fourth side wall portions. In the fourth upper flap folded in the order of the first to fourth upper flaps and finally folded, the portion overlapping the first folded first upper flap is closer to the inner side of the packaging box than the first upper flap. The upper lid is configured by being inserted into the upper lid.

In particular, in this packaging box, the portion of the fourth upper flap (that is, the portion that overlaps with the first upper flap in the fourth upper flap) is formed on the first upper flap more than the first upper flap. A fold for folding a part of the portion of the first upper flap that overlaps the fourth upper flap to the outside of the packaging box when being put inward is formed in advance.

Further, the angle θx formed by the side on the first upper flap side and the upper side of the fourth side wall portion in the fourth upper flap is an acute angle and 90 degrees, and the angle formed by the fold and the upper side of the first side wall portion is formed. Greater than the angle subtracted.

In this packaging box, when the fourth upper flap is finally folded, the first upper flap is folded to the outside of the packaging box at the fold, and then the fourth upper flap is more folded than the first upper flap. The upper lid can be configured by being inserted into the middle side. The first upper flap is bent at the fold line to the outside of the packaging box and the angle θx of the fourth upper flap is acute. (I.e., when the first upper flap is bent to the outside of the packaging box at the fold, the fourth upper flap is placed inside the packaging box more than the first upper flap). The area is much smaller during the sealing operation of closing the upper lid than in the case of the packaging box of (1).

Therefore, according to the packaging box of the first aspect, the fourth upper flap can be more easily inserted into the packaging box than the first upper flap without damaging the first and fourth upper flaps. As a result, the sealing operation for closing the upper lid can be simplified.

On the other hand, this packaging box can be opened by the following procedure.
First, the first upper flap of the upper lid portion closed in the above-described procedure is bent to the outside of the packaging box at the fold. Next, a portion overlapping the first upper flap at the fourth upper flap (ie, when the first upper flap is bent outside the packaging box at the fold, the first upper flap is at the fourth upper flap. At the same time, the fourth upper flap is pulled out to the outside of the packaging box at the upper side of the fourth side wall portion. Bend. Again, the first upper flap is folded to the outside of the packaging box at the fold and the angle θx of the fourth upper flap is acute, so that the fourth upper flap overlaps the first upper flap. Area of the portion (that is, the portion that is put into the inside of the packaging box more than the first upper flap at the fourth upper flap when the first upper flap is bent outside the packaging box at the fold). Is much smaller than in the case of the packaging box of (1). Therefore, the fourth upper flap can be easily pulled out of the packaging box from the first upper flap without damaging the first and fourth upper flaps. After that, the remaining upper flap can be opened by bending the remaining upper flap outside the packaging box at the upper side of the side wall in the reverse order of the sealing operation.

As described above, since the fourth upper flap can be easily pulled out of the packaging box without damaging the first and fourth upper flaps, the opening operation of opening the upper lid portion can be easily performed. Can be.

By the way, in the packaging box according to the first aspect, as described in the second aspect, the first upper flap is provided with a finger-hook hole at a portion (hereinafter, referred to as a bent portion) that is bent to the outside of the packaging box at a fold. Is provided, it becomes possible to easily fold the bent portion by putting a finger on the finger hook hole during the sealing and opening work. Therefore, the sealing and unsealing operations can be performed more easily.

Further, in the packaging box of the first and second aspects, as described in the third aspect, a notch portion for hanging a hand on a portion of the fourth upper flap facing the upper side of the side wall portion with the upper flap. Is provided, during the opening operation, it is possible to easily put a hand on the cut portion and pull out the portion overlapping the first upper flap from the first upper flap with the fourth upper flap.

On the other hand, in the packaging box according to the fourth aspect, in the packaging box according to the first to third aspects, the bottom is formed by the first to fourth lower flaps connected to the lower sides of the first to fourth side walls. . In addition, each lower flap has an acute side formed by a side parallel to a lower side of the side wall (hereinafter referred to as a self-connecting side wall) to which the lower flap is connected and a lower side of the self-connecting side wall. In addition, when the lower sides of the first to fourth side wall portions are arranged in a straight line, the lower side flaps have the same shape. On the side.

According to this packaging box, the bottom part can be configured by the following procedure.
First, each of the lower flaps is placed on a side wall until the A-sloping side of the lower flap abuts on the inner surface of the packaging box with another lower flap adjacent to the A-sloping side. At the bottom of each section, fold it towards the middle of the packaging box. Next, by pressing the first to fourth lower flaps in the middle direction of the packaging box, the portion near the A-slope side of each lower flap is adjacent to the A-slope side of the lower flap. A bottom portion that is on the inner side of the packaging box rather than the lower flap is configured.

In addition, the bottom closed in such a procedure can be released by disengaging the lower flaps only by bending one of the lower flaps to the outside of the packaging box at the lower side of the side wall. Can be.

Therefore, according to the packaging box of the fourth aspect, it is possible to easily assemble (make) and disassemble into a box shape.
Next, the packaging box according to the fifth aspect is a substantially rectangular parallelepiped box including first to fourth rectangular side walls, a bottom, and an upper lid. And the upper lid part of this packaging box is formed from the 1st-4th upper flap connected to each upper side of the 1st-4th side wall part. Here, in particular, each upper flap has an acute angle between a side parallel to an upper side of a side wall portion (hereinafter, referred to as a self-connecting side wall portion) to which the upper flap connects and an upper side of the self-connecting side wall portion. Side (hereinafter, referred to as a B inclined side), and the B inclined side is provided on each of the upper flaps when the upper sides of the first to fourth side wall portions are aligned. On the same side.

According to this packaging box, it can be sealed by the following procedure.
First, each of the upper flaps is placed on a side wall until the B-sloped side of the upper flap abuts against a surface on the inner side of the packaging box at another upper flap adjacent to the B-sloped side. At each upper side of the section, fold the packing box toward the middle side. Then, only by pushing the first to fourth upper flaps in the middle direction of the packaging box, the portion near the B-inclined side of each upper flap is adjacent to the B-inclined side of the upper flap. An upper lid portion that is on the inner side of the packaging box than the upper flap is configured.

Therefore, without damaging the four upper flaps, the portion near the B-inclined side of the upper flap is closer to the inner side of the packaging box than the other upper flaps adjacent to the B-inclined side of the upper flap. The sealing work can be easily performed.

In addition, the upper lid closed in the above-described procedure can easily disengage the upper flaps by simply bending any one of the upper flaps to the outside of the packaging box at the upper side of the side wall. Can be opened.

Next, the packaging box according to claim 6 is a substantially rectangular parallelepiped box including first to fourth rectangular side walls, a bottom, and an upper lid. The upper lid of the packaging box is formed by first to fourth upper flaps connected to the upper sides of the first to fourth side walls. Furthermore, after the first and third upper flaps in the facing positional relationship are bent toward the middle side of the packaging box at each upper side of the first and third side wall portions, the remaining second and fourth upper flaps are The upper lid is configured by being bent toward the middle side of the packaging box at each upper side of the second and fourth side walls.

Here, among the first to fourth upper flaps, at least the second and fourth upper flaps are formed in a substantially square shape. Also, the first slit into which one of the two corners opposite to the second side wall portion side of the second upper flap is inserted into the first upper flap, and the fourth side wall portion side of the fourth upper flap. A second slit into which one of the opposite corners is inserted is provided, and a third slit into which the other of the corners of the second upper flap is inserted into the third upper flap. And a fourth slit into which the other of the two corners of the fourth upper flap is inserted.

According to this packaging box, each of the two corners of the second and fourth upper flaps is inserted into each of the first to fourth slits formed in the first and fourth upper flaps to seal. Can be.
Conversely, each of the two corners inserted into each of the slits can be opened by extracting from each of the slits.

包装 Unlike the packaging box of (2), this packaging box does not have the engagement piece in any of the pair of upper flaps facing each other. That is, when performing the opening and closing operations, it is not necessary to be aware of the protruding portion. Therefore, the sealing and opening operations can be performed easily and quickly.

By the way, in the packaging box of claim 6, as described in claim 7, the second upper flap has a first fold parallel to the upper side of the second side wall portion, and the fourth upper flap has: If a second fold parallel to the upper side of the fourth side wall portion is formed, the second and fourth upper flaps are bent into a mountain shape at the first and second folds, and then the two corner portions are slit. Can be inserted. Further, when both corners are extracted from the slit, the extraction operation can be performed only by bending the second and fourth upper flaps into the mountain shape at the first and second folds.

Therefore, according to the packaging box of claim 7, the sealing and unsealing operations can be further easily performed.
On the other hand, in the packaging box according to the eighth aspect, in the packaging box according to the sixth or seventh aspect, the bottom portion is formed by the first to fourth lower flaps connected to the lower sides of the first to fourth side wall portions. Each of the first and third lower flaps having a positional relationship to face each other is formed in a convex shape with the lower sides of the first and third side walls as bottom sides, and the remaining second and fourth lower flaps respectively. Is formed by a first portion whose width is gradually reduced from each lower side of the second and fourth side wall portions, and a second portion which is connected to the tip of the first portion and is wider than the tip. .

Further, in this packaging box, the first and third lower flaps are bent toward the inside of the packaging box at each lower side of the first and third side walls, and then the second and fourth lower flaps are folded into the second and fourth lower flaps. Similarly, at the lower side of each of the second and fourth side flaps, the second part is bent to the inner side of the packaging box rather than the first and third lower flaps. The two portions enter the inside of the packaging box more than the first and third lower flaps, and the portion overlapping the first and third lower flaps with the first portion of the second and fourth lower flaps is the first portion. The bottom portion is formed by being located on the inner side of the packaging box rather than one portion.

According to this packaging box, the first and third lower flaps are bent toward the inside of the packaging box at the lower sides of the first and third side walls, and then the second and fourth lower flaps are folded into the second and fourth lower flaps. Similarly, the bottom portion can be formed only by bending the second portion at the lower side of each of the four side wall portions to the inner side of the packaging box rather than the first and third lower flaps.

Further, the first and third lower flaps of the bottom portion created in such a procedure are simply pushed into the inside of the packaging box more than the second portions of the second and fourth lower flaps, and the second portion is moved to the second portion. Since the first and third lower flaps are located outside the packaging box, the lower flaps can be released from engagement with each other.

As described above, according to the packaging box of the eighth aspect, the assembling (creation) into a box shape and the dismantling operation can be easily performed.
By the way, in the packaging boxes of the first to eighth aspects, if the material is corrugated cardboard as described in the ninth aspect, the weight can be reduced and sufficient strength can be secured. Another advantage is that the packaging box itself can be easily manufactured at low cost.

Hereinafter, a packaging box of an embodiment to which the present invention is applied will be described with reference to the drawings.
[First embodiment]
First, FIG. 1 is a perspective view of an assembled state of a packaging box 1 of a first embodiment to which the present invention (claims 1 to 4) is applied, and FIG. B) is on the lower side (that is, the bottom 11 is on the upper side). FIG. 2 is a plan view of the packaging box 1 in an unfolded state.

The packaging box 1 is made of a cardboard sheet material and cut into a shape as shown in FIG. The dashed line is provided with a fold so as to be easily bent. Note that, as shown in FIG. 2, the eye direction of the cardboard is the vertical direction in the assembled state. Further, in the following description, the expression regarding the direction, such as up, down, left, right, horizontal, and the like, is the direction in FIG.

The cut packaging box 1 is connected to the rectangular first to fourth side walls S1, S2, S3, S4 and the upper sides Lo1, Lo2, Lo3, Lo4 of the first to fourth side walls S1 to S4. The first to fourth upper flaps Fo1, Fo2, Fo3, and Fo4, and the first to fourth lower flaps Fu1 connected to the lower sides Lu1, Lu2, Lu3, and Lu4 of the first to fourth side walls S1 to S4. , Fu2, Fu3, and Fu4.

In the assembled state, the upper lid 10 is constituted by the first to fourth upper flaps Fo1 to Fo4, and the bottom 11 is constituted by the first to fourth lower flaps Fu1 to Fu4.

Then, the first to fourth side wall portions S1 to S4 are arranged such that the upper sides Lo1 to Lo4 or the lower sides Lu1 to Lu4 are arranged in a straight line, and the second side wall portion S2 from the right side in the unfolded state shown in FIG. The first side wall S1, the fourth side wall S4, and the third side wall S3 are formed in this order. The second side wall S2 and the third side wall S3 are connected to the side of the third side wall S3 opposite to the fourth side wall S4, and a bonding margin 20 for forming the side wall is connected. Have been.

Next, the configuration of the first to fourth side wall portions S1 to S4 will be described in more detail.
The first side wall portion S1 is formed in a rectangular shape including an upper side Lo1 and a lower side Lu1 parallel to each other, and a pair of sides perpendicular to and shorter than the upper side Lo1 and the lower side Lu1.

The third side wall S3 is the same as the first side wall S1.
The second side wall portion S2 is also formed in a rectangular shape including an upper side Lo2 and a lower side Lu2 parallel to each other and a pair of sides perpendicular to and shorter than the upper side Lo2 and the lower side Lu2. The length of the lower side Lu2 is shorter than the upper side Lo1 and the lower side Lu1 of the first side wall S1.

The fourth side wall S4 is the same as the second side wall S2.
Furthermore, in the first to fourth side walls S1 to S4, the lengths of the sides perpendicular to the upper sides Lo1 to Lo4 and the lower sides Lu1 to Lu4 are equal in all the side walls S1 to S4.

Next, the first to fourth upper flaps Fo1 to Fo4 will be described in more detail.
The third upper flap Fo3 includes a side shared by the upper side Lo3 of the third side wall portion S3 (that is, a side substantially the same as the upper side Lo3), a side parallel to the side and having the same length, It is formed in a rectangle consisting of a pair of sides perpendicular to and shorter than one side.

Similarly to the third upper flap Fo3, the second upper flap Fo2 also has a side shared with the upper side Lo2 of the second side wall portion S2, a side parallel to the side and having the same length, and two sides thereof. It is formed in a rectangle consisting of a pair of sides perpendicular to and shorter than the sides.

On the other hand, the first upper flap Fo1 is the same as the third upper flap Fo3, but is different in the following points.
That is, the first upper flap Fo1 has a pair of sides perpendicular to the upper side Lo1 of the first side wall portion S1 and a portion near the base of the fourth upper flap Fo4 side near the first side wall portion S1 side. The fold T1 is formed linearly toward the side parallel to the upper side Lo1 of the portion S1. When the main packaging box 1 is in the assembled state as shown in FIG. 1, the first upper flap Fo1 can be bent to the outside of the main packaging box 1 by the fold T1. Further, in the first upper flap Fo1, of the two parts separated by the fold T1, a part 23 that becomes a right triangle (a part of the first upper flap overlapping the fourth upper flap in the first upper flap of claim 1). (Corresponding to a part) is provided with a round finger hole 21.

The fourth upper flap Fo4 includes a side shared with the upper side Lo4 of the fourth side wall S4, a side L10 parallel to the side, a side perpendicular to the upper side Lo4 of the fourth side wall S4, and a fourth side. The side wall portion S4 is formed in a substantially trapezoidal shape including the side L9 whose angle θA with the upper side Lo4 is acute. Further, the side L9 of the fourth upper flap Fo4 is on the first upper flap Fo1 side, and the angle θA is obtained by subtracting the angle θB between the fold T1 and the upper side Lo1 of the first side wall S1 from 90 degrees. Greater than the angle.

In the fourth upper flap Fo4, a substantially rectangular cut portion 22 that is long in the direction of the side L10 is provided at the center of the side L10.
In addition, the lengths of the first to fourth upper flaps Fo1 to Fo4, which are perpendicular to the upper sides Lo1 to Lo4 of the side wall portion, are equal in all the upper flaps Fo1 to Fo4.

Next, the first to fourth lower flaps Fu1 to Fu4 will be described in more detail.
First, the first lower flap Fu1 is formed of a side shared with the lower side Lu1 of the first side wall part S1, a side L1 parallel to the lower side Lu1 of the first side wall part S1, and a lower side Lu1 of the first side wall part S1. It is formed in a substantially trapezoidal shape including a side L5 having an acute angle θ1 and a side perpendicular to the lower side Lu1 of the first side wall S1.

The third lower flap Fu3 also has an acute angle θ3 between the side shared by the lower side Lu3 of the third side wall S3, the side L3 parallel to the side, and the lower side Lu3 of the third side wall S3. It is formed in a substantially trapezoidal shape including a certain side L7 and a side perpendicular to the lower side Lu3 of the third side wall S3. Further, the third lower flap Fu3 is the same as the first lower flap Fu1.

The second lower flap Fu2 also has an acute angle θ2 between the side shared by the lower side Lu2 of the second side wall S2, the side L2 parallel to the side, and the lower side Lu2 of the second side wall S2. It is formed in a substantially trapezoidal shape including a certain side L6 and a side perpendicular to the lower side Lu2 of the second side wall S2.

The fourth lower flap Fu4 also has an acute angle θ4 between the side shared with the lower side Lu4 of the fourth side wall S4, the side L4 parallel to the side, and the lower side Lu4 of the fourth side wall S4. It is formed in a substantially trapezoidal shape including a certain side L8 and a side perpendicular to the lower side Lu4 of the fourth side wall S4. Further, the fourth lower flap Fu4 is the same as the second lower flap Fu2.

The sides L1, L3 of the first and third lower flaps Fu1, Fu3 are longer than the sides L2, L4 of the second and fourth lower flaps Fu2, Fu4, and the four angles θ1, θ2, θ3, θ4 are Each is equal.

The length of the first to fourth lower flaps Fu1 to Fu4, which is perpendicular to the lower sides Lu1 to Lu4 of the side wall, is the same for all lower flaps Fu1 to Fu4.
Moreover, the sides L5 to L8 of the first to fourth lower flaps Fu1 to Fu4 are in the unfolded state in FIG. 2 in which the lower sides Lu1 to Lu4 of the first to fourth side wall portions S1 to S4 are aligned. The four lower flaps Fu1 to Fu4 are on the same side (the left side in FIG. 2).

Next, the procedure for assembling the packaging box 1 will be described.
First, the joint allowance 20 of the packaging box 1 in the unfolded state shown in FIG. 2 and the surface on the inner side of the packaging box 1 in the second side wall S2, which is opposite to the first side wall S1 side. By joining the side portions with the adhesive, the first to fourth side wall portions S1 to S4 are formed into a rectangular cylindrical shape, and the four side walls of the packaging box 1 shown in FIG. 1 are formed.

Subsequently, the bottom 11 is created. Then, the packaging box 1 in the assembled state shown in FIG. 1 is completed by creating the upper lid portion 10.
Next, a procedure for forming the bottom 11 will be described in detail.

First, as shown in FIG. 3, the first to fourth lower flaps Fu1 to Fu4 are connected to the sides L5 to L8 of the lower flaps Fu1 to Fu4 (corresponding to the inclined side in claim 4) and the sides L5 to L8. Surfaces 31, 32, 33, and 34 (34 for L5, 31 for L6, 32, and L8 for L7) that are on the inner side of the packaging box 1 with other lower flaps Fu1 to Fu4 adjacent to the And then bend until 33) comes into contact. In the drawing, the portions shown by dotted lines are in a transparent state.

Next, by pushing the first to fourth lower flaps Fu1 to Fu4 inward (downward in FIG. 3) of the packaging box 1, the bottom portion 11 shown in FIG. 1B can be created.
Next, a procedure for closing (sealing) the upper lid 10 will be described in detail.

First, the first to third upper flaps Fo1 to Fo3 are bent in the order of Fo1, Fo2 and Fo3 at the upper sides Lo1 to Lo3 of the side walls S1 to S3 toward the inside of the packaging box 1.
Next, as shown in FIG. 4, the right triangular portion 23 of the first upper flap Fo1 is bent upward (outside) of the packaging box 1 at the fold T1, and then the fourth upper flap Fo4 is folded from the first upper flap Fo1. Into the packaging box 1 as well. Then, by returning the right triangle portion 23 of the first upper flap Fo1 to its original position, the upper lid portion 10 can be configured.

As described above, by performing the preparation work in the order of the side wall, the bottom part 11, and the top lid part 10, the packaging box 1 can be prepared from one sheet material shown in FIG.
On the other hand, the disassembly work of the packaging box 1 can be performed in the following procedure.

First, open the upper lid 10. Next, the bottom 11 is opened. Then, by peeling off the portions bonded at the joint margin 20 on the four side walls formed in the shape of the rectangular tube, the packaging box 1 can be dismantled by returning to the developed state of FIG.

Next, the procedure for opening (unsealing) the upper lid 10 will be described in detail.
First, the first upper flap Fo1 of the upper lid portion 10 closed in the above-described procedure is bent to the outside of the packaging box 1 at the fold T1. Next, at this time, the portion 24 overlapping the first upper flap Fo1 at the fourth upper flap Fo4 (a triangular portion having the fold T1 and the side L9 of the fourth upper flap Fo4 as two sides in FIG. 4). At the same time that the fourth upper flap Fo4 is pulled out to the outside of the packaging box 1 from the first upper flap Fo1, the fourth upper flap Fo4 is bent to the outside of the packaging box 1 at the upper side Lo4 of the fourth side wall S4.

Thereafter, in the reverse order of the sealing operation, the remaining upper flaps Fo3 to Fo1 can be opened by folding the outer flaps Fo3 to Fo1 outside the packaging box 1 at the upper sides Lo3 to Lo1 of the side walls S3 to S1 to which they are connected. it can.

Next, the operation of opening (opening) the bottom 11 will be described in detail.
By simply bending any one of the lower flaps Fu1 to Fu4 out of the bottom portion 11 closed in the above-described procedure to the outside of the packaging box 1 at the lower side of the side wall portion to which it is connected, the lower flaps Fu1 are connected to each other. Fu 4 can be released to release the bottom 11.

As described above, the work is performed in the order of the upper lid part 10, the bottom part 11, and the side wall, so that the packaging box 1 can be returned (disassembled) to one sheet material shown in FIG.
Here, when the present packaging box 1 is completed, the portion 25 overlapping the first upper flap Fo1 at the fourth upper flap Fo4 (the side L9 of the fourth upper flap Fo4 in FIG. 5 and the first upper flap Fo1 at the first upper flap Fo1). The area of the side opposed to the upper side Lo1 of the side wall portion S1 and the side of the first upper flap Fo1 which is perpendicular to the upper side Lo1 of the first side wall portion S1 and which is on the side of the fourth upper flap Fo4) is 4 Since the angle θA of the upper flap Fo4 is acute, it is smaller than the area of the overlapping portion of the upper flaps in the packaging box of the prior art (1). In addition, both when closing and opening the upper lid portion 10, the portion of the fourth upper flap Fo4 overlapping the first upper flap Fo1 is formed by folding the first upper flap Fo1 at the fold T1 as described above. The above-mentioned portion 24 which is a part of the portion 25 is obtained. The area of the portion 24 is much smaller than the area of the portion where the upper flaps overlap with each other in the prior art (1). FIG. 5 is a plan view showing the first upper flap Fo1 and the fourth upper flap Fo4 in a state where the upper lid unit 10 is configured, from above the main packaging box 1.

Therefore, it is easy to put the fourth upper flap Fo4 into the inside of the packaging box 1 more than the first upper flap Fo1 and to easily pull out the fourth upper flap Fo4 outside the packaging box 1 than the first upper flap Fo1. Can be done.

According to the packaging box 1 of the first embodiment as described above, the fourth upper flap Fo4 is more easily placed in the packaging box 1 than the first upper flap Fo1 without damaging the first and fourth upper flaps Fo1 and Fo4. It can be easily inserted into the inside. Further, the fourth upper flap Fo4 can be more easily pulled out of the packaging box 1 than the first upper flap Fo1 without damaging the first and fourth upper flaps Fo1 and Fo4. Therefore, the sealing and unsealing operations can be easily performed.

Here, when the first upper flap Fo1 is bent at the fold line T1, the efficiency of the sealing and unsealing operations is further improved by inserting a finger into the finger hanging hole 21 and performing the operation.
Also, when performing the opening operation, the operator hands the notch 22 of the fourth upper flap Fo4 to bend the fourth upper flap Fo4 to the outside of the packaging box 1 at the upper side of the fourth side wall S4. Since the portion 24 overlapping the first upper flap Fo1 in the fourth upper flap Fo4 can be easily pulled out from the first upper flap Fo1, the efficiency of the opening operation is further improved.

And, furthermore, the bottom 11 of the packaging box 1 can be made by a simple procedure. Also, by simply bending any one of the lower flaps Fu1 to Fu4 at the bottom 11 formed to the outside of the packaging box 1 at the lower side of the side wall to which the lower flaps Fu1 to Fu4 are connected, the lower flaps Fu1 to Fu4 can be connected to each other. The joint can be released and the bottom 11 can be opened.

Therefore, the assembling (creation) into a box shape and the disassembly operation can be easily performed.
On the other hand, the packaging box 1 may be formed of iron, cardboard, or the like. However, when formed of corrugated cardboard as in the first embodiment, the weight can be reduced, and sufficient strength can be obtained. This is advantageous in that it can be secured.

[Second embodiment]
Next, the packaging box 2 of the second embodiment to which the present invention (claims 6 to 8) is applied will be described. In the following figures relating to the second embodiment, as in FIGS. 1 to 5 used in the first embodiment, broken lines indicate folds and dotted lines indicate transmission.

First, FIG. 6 is a perspective view of the packaging box 2 in an assembled state, in which FIG. 6A shows the upper lid 12 as an upper side and FIG. 6B shows the lower side (that is, the bottom 13 as an upper side). FIG. 7 is a plan view of the packaging box 2 in an unfolded state.

The packaging box 2 is made of a cardboard sheet material and cut into a shape as shown in FIG. Note that, as shown in FIG. 7, the eye direction of the cardboard is the vertical direction in the assembled state. In the following description, the expression regarding the direction, such as up, down, left, right, vertical and horizontal, is the direction in FIG.

The cut packaging box 2 is connected to the rectangular first to fourth side walls S5, S6, S7, S8 and the upper sides Lo5, Lo6, Lo7, Lo8 of the first to fourth side walls S5 to S8. The first to fourth upper flaps Fo5, Fo6, Fo7, and Fo8, and the first to fourth lower flaps Fu5 connected to the lower sides Lu5, Lu6, Lu7, and Lu8 of the first to fourth side walls S5 to S8. , Fu6, Fu7, and Fu8.

Also, in the assembled state, the first to fourth upper flaps Fo5 to Fo8 constitute the upper lid portion 12, and the first to fourth lower flaps Fu5 to Fu8 constitute the bottom portion 13.

The first to fourth side walls S5 to S8 are arranged such that the upper side Lo5 to Lo8 or the lower side Lu5 to Lu8 of each side wall is aligned in a straight line, and the first side wall S5 is arranged from the left side in FIG. , A second side wall S6, a third side wall S7, and a fourth side wall S8. In addition, a joining margin 30 for joining the first side wall S5 and the fourth side wall S8 to form a side wall is connected to the side of the first side wall S5 opposite to the second side wall S6. I have.

Next, the configuration of the first to fourth side wall portions S5 to S8 will be described in more detail.
The first side wall portion S5 is formed in a rectangular shape including an upper side Lo5 and a lower side Lu5 parallel to each other, and a pair of sides perpendicular to and shorter than the upper side Lo5 and the lower side Lu5.

The third side wall S7 is the same as the first side wall S5.
The second side wall portion S6 is formed in a rectangular shape including an upper side Lo6 and a lower side Lu6 parallel to each other, and a pair of sides perpendicular to and longer than the upper side Lo6 and the lower side Lu6. The length of the upper side Lo6 and the lower side Lu6 is shorter than the upper side Lo5 and the lower side Lu5 of the first side wall S5.

On the vertical bisector of the upper side Lo6 and the lower side Lu6 of the second side wall S6, a substantially elliptical hole 41 symmetrical to the line is provided on the upper side Lo6 side.
The fourth side wall S8 is the same as the second side wall S6. Further, a hole 42 similar to the hole 41 of the second side wall S6 is provided also in the fourth side wall S8.

Further, in the first to fourth side walls S5 to S8, the lengths of the sides perpendicular to the upper sides Lo5 to Lo8 and the lower sides Lu5 to Lu8 are equal in all the side walls S5 to S8.
Next, the first to fourth upper flaps Fo5 to Fo8 will be described in more detail.

First, the second upper flap Fo6 includes a side shared by the upper side Lo6 of the second side wall portion S6 (that is, a side substantially the same as the upper side Lo6), a side parallel to the side, and a side parallel to the side. It is formed in a substantially rectangular shape including a pair of sides that are vertical and shorter than them. Then, both ends of the second upper flap Fo6 opposite to the second side wall portion S6 are rounded.

Folds T2 are formed on the second upper flap Fo6 at positions corresponding to vertical bisectors of a pair of sides perpendicular to the upper side Lo6 of the second side wall S6. When the packaging box 2 is in the assembled state as shown in FIG. 6, the second upper flap Fo6 can be bent in a mountain shape by the fold T2 as shown in FIG.

The fourth upper flap Fo8 is the same as the second upper flap Fo6.
Further, also on the fourth upper flap Fo8, a fold T3 is formed at a position corresponding to a vertical bisector of a pair of sides perpendicular to the upper side Lo8 of the fourth side wall S8. When the packaging box 2 is in the assembled state as shown in FIG. 6, the fourth upper flap Fo8 can be bent into a mountain shape by the fold T3 as shown in FIG.

The first upper flap Fo5 has a side shared with the upper side Lo5 of the first side wall portion S5, a side parallel to the side, and a pair of sides perpendicular to the two sides and shorter than the sides. , And is formed in a substantially rectangular shape. Further, both ends of the first upper flap Fo5 opposite to the first side wall portion S5 are rounded.

Furthermore, on the side of the first upper flap Fo5 facing the upper side Lo5 of the first side wall S5, two round holes 43 and 44 are provided in the longitudinal direction of the side. Further, the two holes 43 and 44 are symmetric with respect to a vertical bisector of the upper side Lo5 of the first side wall portion S5.

In particular, the first upper flap Fo5 includes the first upper flap of the two corners 51 and 53 (the hatched portion indicated by the dotted line in FIG. 7) opposite to the second side wall portion S6 of the second upper flap Fo6. The first slit SL1 into which the corner 51 on the Fo5 side is inserted, and the two corners 52, 54 of the fourth upper flap Fo8 opposite to the fourth side wall S8 side, which are not on the third upper flap Fo7 side. And a second slit SL2 into which the corner portion 52 is inserted.

The third upper flap Fo7 is the same as the first upper flap Fo5.
The third upper flap Fo7 is also provided with holes 45 and 46 similar to the holes 43 and 44 of the first upper flap Fo5.

In particular, the third upper flap Fo7 includes a third slit SL3 into which the corner 53 of the second upper flap Fo6 on the third upper flap Fo7 side is inserted, and a fourth upper flap. Among the two corners 52 and 54 of Fo8, there is provided a fourth slit SL4 into which the corner 54 on the third upper flap Fo7 side is inserted.

In addition, the lengths of the sides perpendicular to the upper sides Lo5 to Lo8 of the side wall portions in the first to fourth upper flaps Fo5 to Fo8 are equal in all the upper flaps Fo5 to Fo8.
Next, the first to fourth slits SL1 to SL4 will be described in detail.

First, the first slit SL1 in the first upper flap Fo5 has a side L11 which is a part of a side shared with the upper side Lo5 of the first side wall portion S5 (ie, a side substantially the same as the upper side Lo5), The angle formed between the side L12 perpendicular to the side L11, the side L13 parallel to the side L11 and longer than the side L11, the side L14 perpendicular to the side L11 and shorter than the side L12, and the side L11 are obtuse and An angle formed with L14 is also formed as a pentagon including an obtuse side L15. Then, of the two sides L12 and L14 perpendicular to the side L11, the side L12 is closer to the second upper flap Fo6.

Further, the distance from the side L14 of the first slit SL1 to the side of the first upper flap Fo5 on the second upper flap Fo6 side is the length of the upper flaps Fo5 to Fo8 in the vertical direction (the direction perpendicular to the upper sides Lo5 to Lo8). Is equal to

The second slit SL2 is congruent with the first slit SL1, and is formed in a position and shape obtained by moving the first slit SL1 line-symmetrically with respect to a perpendicular bisector of the upper side Lo5 of the first side wall S5. I have.

On the other hand, the third and fourth slits SL3 and SL4 are also the same as the first and second slits SL1 and SL2. The third slit SL3 is formed at the same position and shape as the second slit SL2 on the first upper flap Fo5 in the third upper flap Fo7, and the fourth slit SL4 is formed in the third upper flap Fo7. It is formed in the same position and shape as the first slit SL1 on the first upper flap Fo5. In other words, the first and third upper flaps Fo5 and Fo7 are exactly the same not only in the congruence of the outer frames, but also in those formed thereon.

Next, the first to fourth lower flaps Fu5 to Fu8 will be described in more detail.
First, the first lower flap Fu5 has a side shared by the lower side Lu5 of the first side wall S5 (that is, a side substantially the same as the lower side Lu5), a side L31 perpendicular to the side, and a side perpendicular to the side L31. Side L32, a side L33 parallel to the side L31 and shorter than the side L31, a side L34 perpendicular to the side L31 and longer than the side L32, and a side L35 parallel to the side L31 and having the same length as the side L33. And a side L36 perpendicular to the side L31 and equal in length to the side L32, and a side L37 parallel to the side L31 and equal in length to the side L31.

Further, the corner between the side L31 and the side L32, the corner between the side L33 and the side L34, the corner between the side L34 and the side L35, and the corner between the side L36 and the side L37 are rounded, respectively. Takes on.
Further, in the first lower flap Fu5, two round holes 47 and 48 are provided in the longitudinal direction of the side L34 in the protruding portion including the side L33, the side L34, and the side L35. Further, the two holes 47 and 48 are symmetric with respect to a vertical bisector of the lower side Lu5 of the first side wall portion S5.

And the third lower flap Fu7 is the same as the first lower flap Fu5. Further, holes 49 and 50 similar to the holes 47 and 48 are provided in the third lower flap Fu7 at the same position as the first lower flap Fu5.

On the other hand, the second lower flap Fu6 has an acute angle formed between the side shared by the lower side Lu6 of the second side wall S6 and the side, and the end on the first lower flap Fo5 side of both ends of the side. The angle between the side L38 extending from the lower side Lu6 and the side shared by the lower side Lu6 is acute, and the side L39 extending from the end on the third lower flap Fu7 side of the both ends of the side, and the second of the sides L38 and L39. A trapezoidal first portion 55 composed of a virtual straight line L40 (dashed line shown in FIG. 7) connecting the ends on the opposite side to the side wall portion S6 side, and a leading end of the first portion 55 From the second side wall portion S6 toward the side opposite to the second side wall portion S6.

Further, the second lower flap Fu6 is symmetrical with respect to a perpendicular bisector of the lower side Lu6 of the second side wall S6.
Here, the distance Dx1 between the side L36 of the first lower flap Fu5 and the lower side Lu5 of the first side wall S5 is the end of the side L38 of the second lower flap Fu6 on the first lower flap Fu5 side end. And a perpendicular line extending from the other end of the side L38 to the lower side Lu6 of the second side wall S6 is less than or equal to Dx2.

The distance Dy1 between the side L35 and the side L37 of the first lower flap Fu5 is greater than or equal to the distance Dy2 between the lower side Lu6 of the second side wall S6 and the virtual straight line L40.
Further, the distance Dz1 between the side L34 and the side L36 of the first lower flap Fu5 is equal to or more than half the length of the virtual straight line L40.

Note that, in FIG. 7, the distances Dx1, Dx2, Dy1, Dy2, and Dz1 are indicated by alternate long and short dash lines like the virtual straight line L40.
The length of the first lower flap Fu5 in the vertical direction (the direction perpendicular to the lower side Lu5) is equal to the length of the second lower flap Fu6 in the vertical direction (the direction perpendicular to the lower side Lu6).

The fourth lower flap Fu8 is the same as the second lower flap Fu6. That is, the fourth lower flap Fu8 is formed by the first portion 56 and the second portion 58 similar to the second lower flap Fu6.

Next, a procedure for assembling the packaging box 2 will be described.
First, the joint margin 30 of the packaging box 2 in the unfolded state shown in FIG. 7 and the surface on the middle side of the packaging box 2 at the fourth side wall S8, which is opposite to the third side wall S7. By joining the side portions with an adhesive, the first to fourth side wall portions S5 to S8 are formed into a rectangular tube shape, and four side walls of the packaging box 2 shown in FIG. 6 are formed.

Subsequently, the bottom portion 13 is created. Then, by forming the upper lid portion 12, the packaging box 2 in the assembled state shown in FIG. 6 is completed. The packaging box 2 completed in such a procedure can be returned to one sheet material shown in FIG. 7 by performing the operation in the reverse procedure.

Next, a procedure for forming the bottom portion 13 will be described in detail.
First, the first and third lower flaps Fu5 and Fu7 are bent toward the inside of the packaging box 2 at the lower sides Lu5 and Lu7 of the first and third side walls S5 and S7. Next, the second and fourth lower flaps Fu6 and Fu8 are similarly bent toward the inside of the packaging box 2 at the lower sides Lu6 and Lu8 of the second and fourth side walls S6 and S8, at which time shown in FIG. As described above, the second portions 57 and 58 are bent to reach the inside of the packaging box 2 more than the first and third lower flaps Fu5 and Fu7.

Then, as shown in FIG. 9, the second portions 57 and 58 of the second and fourth lower flaps Fu6 and Fu8 enter the inside of the packaging box 2 more than the first and third lower flaps Fu5 and Fu7. The portions 59, 60, 61, 62 overlapping the first portions 55, 56 of the second and fourth lower flaps Fu6, Fu8 at the first and third lower flaps Fu5, Fu7 are the first of the lower flaps Fu6, Fu8. It is on the inner side of the packaging box 2 than the parts 55 and 56.

Thereby, since the lower flaps Fu5 to Fu8 are engaged with each other, the bottom portion 13 shown in FIG. 6B is configured.
In addition, the bottom 13 closed in such a procedure causes the first and third lower flaps Fu5 and Fu7 to be in the packaging box 2 more than the second portions 57 and 58 of the second and fourth lower flaps Fu6 and Fu8. By simply pushing the second portion 57, 58 into the side of the packaging box 2 further than the state shown in FIG. 9, the second portions 57, 58 are outside the packaging box 2 more than the first and third lower flaps Fu5, Fu7. The engagement between the lower flaps Fu5 to Fu8 can be easily released and released.

Next, a procedure for closing (sealing) the upper lid portion 12 will be described in detail.
First, the first and third upper flaps Fo5 and Fo7 are bent toward the inside of the packaging box 2 at the upper sides Lo5 and Lo7 of the first and third side walls S5 and S7. Next, the second and fourth upper flaps Fo6 and Fo8 are similarly bent at the upper sides Lo6 and Lo8 of the second and fourth side wall portions S6 and S8, and the corners 51 to 41 of the second and fourth upper flaps Fo6 and Fo8. 54 is inserted into each of the slits SL1 to SL4 of the first and third upper flaps Fo5 and Fo7 corresponding thereto, whereby the upper lid portion 12 is formed.

At this time, as shown in FIG. 8, the second and fourth upper flaps Fo6 and Fo8 can be bent into a mountain shape by the folds T2 and T3, so that each of the corners 51 to 54 corresponds to the corner. It can be easily inserted into each of the slits SL1 to SL4.

In addition, the upper lid 12 closed in such a procedure pulls out the corners 51 to 54 of the second and fourth upper flaps Fo6 and Fo8 from the respective slits SL1 to SL4, and at the same time, pulls out the second and fourth upper flaps. The flaps Fo6 and Fo8 are bent to the outside of the packaging box 2 at the upper sides Lo6 and Lo8 of the second and fourth side walls S6 and S8, and then the first and third upper flaps Fo5 and Fo7 are formed into the first and third side walls. It can be opened by bending the outer side of the packaging box 2 at the upper sides Lo5, Lo7 of the parts S5, S7. When each of the corners 51 to 54 is extracted from each of the slits SL1 to SL4, the second and fourth upper flaps Fo6 and Fo8 are simply bent at the folds T2 and T3 into a mountain shape, and the extraction operation is performed. It can be carried out.

According to the packaging box 2 of the second embodiment as described above, it is not necessary to be conscious of the protruding portion as in the prior art (2) when performing the opening and closing operations. Can be implemented easily and quickly. Further, since there are the folds T2 and T3, it becomes even easier.

Further, the bottom 13 of the present packaging box 2 is formed by bending the first and third lower flaps Fu5 and Fu7 toward the inside of the packaging box 2 at the lower sides Lu5 and Lu7 of the first and third side walls S5 and S7. Similarly, the second and fourth lower flaps Fu6 and Fu8 are similarly disposed on the lower sides Lu6 and Lu8 of the second and fourth side wall portions S6 and S8, respectively, so that the second portions 57 and 58 are formed from the first and third lower flaps Fu5 and Fu7. Can also be created only by the procedure of folding up to the inside of the packaging box 2.

Then, the first and third lower flaps Fu5 and Fu7 of the bottom portion 13 created by such a procedure are moved to the inside of the packaging box 2 more than the second portions 57 and 58 of the second and fourth lower flaps Fu6 and Fu8. Just by pushing, the second portions 57 and 58 are located outside the packaging box 2 more than the first and third lower flaps Fu5 and Fu7, so that the engagement of the lower flaps Fu5 to Fu8 is released and the bottom portion 13 is opened. can do.

Therefore, the assembling (creation) into a box shape and the disassembly operation can be easily performed.
In addition, the holes 43 to 50 of the first and third upper flaps Fo5 and Fo7 and the first and third lower flaps Fu5 and Fu7 serve as ventilation holes. For example, when vegetables such as spinach and lettuce are put in the packaging box 2, it is possible to maintain the freshness for a long time.

Further, the holes 41 and 42 of the second and fourth side wall portions S6 and S8 may be used as holes for hanging a finger. For example, when carrying the packaging box 2, it is convenient to use it by hanging a finger.
[Third embodiment]
The packaging box of the third embodiment has the same upper lid as the bottom 11 of the packaging box 1 as compared with the packaging box 1 of the first embodiment. The bottom of the packaging box may have any configuration as long as it can be closed, but has the same configuration as the bottom 13 of the packaging box 2 of the second embodiment.

According to such a packaging box, the upper lid can be easily closed and opened by a simple procedure, similarly to the bottom 11 of the packaging box 1 of the first embodiment.
In this case, referring to the reference numerals in FIG. 1, the first to fourth lower flaps Fu1 to Fu4 correspond to the first to fourth upper flaps according to claim 5, and the first to fourth side walls. The lower sides Lu1 to Lu4 of the portions S1 to S4 correspond to the upper sides of the first to fourth side wall portions. The sides L5 to L8 of the first to fourth lower flaps Fu1 to Fu4 correspond to the inclined side sides according to the fifth aspect.

[Fourth embodiment]
Next, a packaging box 3 according to a fourth embodiment will be described with reference to FIGS. In FIGS. 10 to 13, the same components as those in FIGS. 6 to 9 described above are denoted by the same reference numerals, and a description thereof will be omitted.

First, FIG. 10 is a perspective view of the packaging box 3 of the third embodiment in an assembled state, in which FIG. 10A shows the upper lid 12 as an upper side and FIG. 10B shows the bottom 13 as an upper side. FIG. 11 is a plan view of the packaging box 3 in an unfolded state.

The packaging box 3 of the fourth embodiment differs from the packaging box 2 of the second embodiment mainly in the following points (1) to (5).
(1) The lengths of the upper side Lo5 and the lower side Lu5 of the first side wall S5 are shorter than the upper side Lo6 and the lower side Lu6 of the second side wall S6. Similarly, the upper side Lo7 and the lower side Lu7 of the third side wall S7 are shorter than the upper side Lo8 and the lower side Lu8 of the fourth side wall S8.

Note that the first to fourth side wall portions S5 to S8 are arranged such that the upper side Lo5 to Lo8 or the lower side Lu5 to Lu8 of each side wall portion are arranged in a straight line. , A first side wall S5, a second side wall S6, and a third side wall S7. The substantially elliptical holes 41 and 42 provided in the packaging box 2 of the second embodiment are provided in the first and third side walls S5 and S7, respectively.

(2) The second upper flap Fo6 is provided with cuts 71 and 72 at a portion of the upper flap Fo6 opposite to the second side wall portion S6 as shown in FIG. Then, after the corners 51, 53 of the upper flap Fo6 are inserted into the corresponding slits SL1, SL3 (that is, after the upper lid part 12 is created), the corners 51, 53 are moved to the corresponding upper flap Fo5, It is made to catch on Fo7.

The fourth upper flap Fo8 is also provided with cuts 73, 74 of the same shape at the same positions as the cuts 71, 72 on the second upper flap Fo6.
(3) The first to fourth slits SL1 to SL4 provided in the first and third upper flaps Fo5 and Fo7 respectively have corresponding corners of the second and fourth upper flaps Fo6 and Fo8 inserted. Thus, it is provided at a position where the upper lid 12 can be formed.

(4) The first to fourth lower flaps Fu5 to Fu8 are formed in a rectangular shape.
Then, in the first lower flap Fu5, as shown in FIG. 11, the two cuts C parallel to the lower side Lu5 of the first side wall S5 are symmetric with respect to the perpendicular bisector of the lower side Lu5. In addition, a fold T4 parallel to the lower side Lu5 is formed on the lower side Lu5 side of the first side wall S5 from the two cuts C.

The third lower flap Fu7 is the same as the first lower flap Fu5. That is, in the third lower flap Fu7, the two cuts C and the fold parallel to the lower side Lu7 of the third side wall S7 are located at the same position as the two cuts C and the fold T4 on the first lower flap Fu5. T5 is provided.

(5) The second lower flap Fu6 and the fourth lower flap Fu8 come into contact with each other when the second and fourth lower flaps Fu6 and Fu8 are bent toward the inside of the packaging box 3. Further, two rectangular cuts 75 are formed on the side of the second lower flap Fu6 that is in contact with the fourth lower flap Fu8 (that is, the side of the second lower flap Fu6 that faces the lower side Lu6 of the second side wall S6). , 76 are provided in a symmetrical positional relationship. The fourth lower flap Fu8 is also provided with cuts 77, 78 having the same shape at the same positions as the cuts 75, 76 of the second lower flap Fu6.

The distance between the cut C on the second lower flap Fu6 side and the lower side Lu5 of the first side wall S5 at the first lower flap Fu5 is Dx3, and the side of the second lower flap Fu6 on the first lower flap Fu5 side. Assuming that the distance between the notch 75 of the second lower flap Fu6 on the first lower flap Fu5 side is Dx4, Dx3 is longer than Dx4. The length Dy3 of the cut C is equal to the distance Dy4 between the cut 75 (or 76) of the second lower flap Fu6 and the lower side Lu6 of the second side wall S6.

According to the packaging box 3 of the third embodiment having the above-described constitutions (1) to (5), the corners 51 to 54 are formed in the same manner as in the above-described operations of sealing and unsealing the packaging box 2 of the second embodiment. Can be easily inserted and removed from the corresponding slits SL1 to SL4 to easily perform the sealing and unsealing operations.

更 に Furthermore, when the upper lid portion 12 is formed (sealed), each of the corner portions 51 to 54 is caught by the corresponding upper flap Fo5, Fo7 as shown in FIG.

The bottom 13 can be created by the following procedure.
First, the second and fourth lower flaps Fu6 and Fu8 are bent toward the inside of the packaging box 3. Thereby, as shown in FIG. 13, the notches 75 to 78 of both flaps Fu6 and Fu8 are combined to form two holes 79 and 80.

Next, as shown in FIG. 12, the portions 81 and 82 of the first lower flap Fu5 on the opposite side to the lower side Lu5 side of the first side wall portion S5 from the cut C are bent in the directions of arrows Y1 and Y2. Next, the lower flap Fu5 is bent into a mountain shape at the fold T4, and inserted into the hole 79 formed by the cuts 75 and 78 of the second and fourth lower flaps Fu6 and Fu8.

Further, by performing the above-described operation performed on the first lower flap Fu5 on the third lower flap Fu7 in the same manner, the bottom portion 13 illustrated in FIG. 10B can be created.
The bottom 13 of the packaging box 3 is the same as the bottom lid of the packaging box of Japanese Utility Model Application No. 2003-1679 previously filed by the present applicant.

[Others]
The embodiments of the present invention have been described above, but it goes without saying that the present invention can take various forms.

For example, in the packaging box 1 of the first embodiment, the bottom 11 may be replaced with the same configuration as the bottom 13 of the packaging box 2 of the second embodiment. Further, the shape of the second and third upper flaps Fo2 and Fo3 is not limited to a rectangle, and may be, for example, the same shape as the second and third lower flaps Fu2 and Fu3.

The material of the packaging box is not limited to corrugated cardboard, but may be, for example, flexible plastic or cardboard.

It is a perspective view in the assembled state of the packaging box of 1st Example. It is a top view in the deployment state of the packaging box. It is explanatory drawing explaining the preparation procedure of the bottom part of the same packaging box. It is explanatory drawing explaining the sealing and opening procedure of the upper lid part of the same packaging box. It is explanatory drawing explaining the structure of the upper lid part of the same packaging box. It is a perspective view in the assembled state of the packaging box of 2nd Example. It is a top view in the deployment state of the packaging box. It is explanatory drawing explaining the sealing and opening procedure of the upper lid part of the same packaging box. It is explanatory drawing explaining the preparation and disassembly procedure of the bottom part of the packaging box. It is a perspective view in the assembled state of the packaging box of 4th Example. It is a top view in the deployment state of the packaging box. It is explanatory drawing explaining the structure of the upper lid part of the same packaging box. It is explanatory drawing explaining the preparation procedure of the bottom part of the same packaging box.

Explanation of reference numerals

1, 2, 3 ... packaging box, 10, 12 ... top lid, 11, 13 ... bottom, S1 to S4, S5 to S8 ... first to fourth side wall, Lo1 to Lo4, Lo5 to Lo8 ... first to first Upper sides of four side wall parts, Lu1 to Lu4, Lu5 to Lu8... Lower sides of first to fourth side wall parts, Fo1 to Fo4, Fo5 to Fo8. To the fourth lower flap, 21: finger hole, 22: notch, 23: a part of the first upper flap overlapping the fourth upper flap, 24: a part of the fourth upper flap overlapping the first upper flap , 51, 53 ... corners of the second upper flap, 52, 54 ... corners of the fourth upper flap, 55, 56 ... first portions of the second and fourth lower flaps, 57, 58 ... second and fourth 2nd part of lower flap, 59-62 ... 1st part in 1st, 3rd lower flap Overlapping portions, L1 to L4, L5 to L8 ... edges of the first to fourth lower flap, L9, L10 ... side of the fourth upper flap, T1T5 ... fold, SL1 to SL4 ... first to fourth slit

Claims (9)

It is a box of a substantially rectangular parallelepiped consisting of square first to fourth side walls, a bottom, and an upper lid,
The upper lid portion is formed by first to fourth upper flaps connected to respective upper sides of the first to fourth side wall portions,
Each of the first to fourth upper flaps that are adjacent to each other are clockwise or counterclockwise, and each of the upper sides of the first to fourth side walls is directed toward the middle side of the box. ~ Bend in the order of the fourth upper flap,
Furthermore, in the fourth upper flap which is finally folded, a portion overlapping with the first upper flap which is folded first is inserted into the inside of the box rather than the first upper flap. Packaging box
In the first upper flap,
When the portion of the fourth upper flap is inserted into the box more than the first upper flap, a part of the portion that overlaps with the fourth upper flap at the first upper flap is outside the box. A fold for bending into is formed in advance,
In the fourth upper flap, the angle formed by the side on the first upper flap side and the upper side of the fourth side wall is an acute angle, and the angle formed by the fold and the upper side of the first side wall from 90 degrees. Greater than the angle minus
A packaging box characterized by: The packaging box according to claim 1,
The first upper flap is provided with a finger hole in a portion that is bent outside the box with the fold as a boundary,
A packaging box characterized by: In the packaging box according to claim 1 or 2,
The fourth upper flap is provided with a notch for putting a hand on a portion of a side of the fourth upper flap opposite to an upper side of the fourth side wall,
A packaging box characterized by: The packaging box according to any one of claims 1 to 3,
The bottom is formed by first to fourth lower flaps connected to the lower sides of the first to fourth side walls,
Each lower flap is
An angle between a side parallel to a lower side of the side wall (hereinafter, referred to as a self-connecting side wall) to which the lower flap is connected and a lower side of the self-connecting side wall among the first to fourth side walls is an acute angle. Has a certain side (hereinafter, referred to as an inclined side),
Further, when the lower sides of the first to fourth side walls are aligned on a straight line, the inclined side sides are on the same side in each of the first to fourth lower flaps.
A packaging box characterized by: A substantially rectangular parallelepiped box comprising first to fourth side walls, a bottom, and an upper lid, wherein the upper lid is connected to each of the upper sides of the first to fourth side walls. A packaging box comprising an upper flap,
Each of the upper flaps,
Among the first to fourth side wall portions, an angle formed between a side parallel to an upper side of the side wall portion to which the upper flap is connected (hereinafter, referred to as a self-connecting side wall portion) and an upper side of the self-connecting side wall portion is an acute angle. Has a certain side (hereinafter, referred to as an inclined side),
Further, when the upper sides of the first to fourth side walls are arranged in a straight line, the inclined side sides are on the same side in each of the first to fourth upper flaps.
A packaging box characterized by: It is a box of a substantially rectangular parallelepiped consisting of square first to fourth side walls, a bottom, and an upper lid,
The upper lid portion is formed by first to fourth upper flaps connected to respective upper sides of the first to fourth side wall portions,
Of the first to fourth upper flaps, the first and third upper flaps which are in opposing positional relation remain after being bent toward the middle side of the box at each upper side of the first and third side walls. In the packaging box in which the upper lid portion is configured, the second and fourth upper flaps are bent toward the middle side of the box at each upper side of the second and fourth side wall portions,
At least the second and fourth upper flaps of the first to fourth upper flaps are formed in a substantially square shape,
A first slit into which one of two corners of the second upper flap opposite to the second side wall portion is inserted, and a fourth side wall of the fourth upper flap; A second slit into which one of the two corners on the opposite side to the part side is inserted, and
The third upper flap has a third slit into which the other one of the two corners of the second upper flap is inserted, and a fourth slit into which the other one of the two corners of the fourth upper flap is inserted. Is provided,
A packaging box characterized by: The packaging box according to claim 6,
A first fold parallel to an upper side of the second side wall portion is formed on the second upper flap,
A second fold parallel to an upper side of the fourth side wall portion is formed on the fourth upper flap;
A packaging box characterized by: In the packaging box according to claim 6 or 7,
The bottom is formed by first to fourth lower flaps connected to the lower sides of the first to fourth side walls,
Of the first to fourth lower flaps, each of the first and third lower flaps which are in a positional relationship to face each other is formed in a convex shape with the lower sides of the first and third side wall portions as bottom sides. Each of the remaining second and fourth lower flaps is connected to a first portion whose width is gradually reduced from each lower side of the second and fourth side wall portions, and is connected to a tip of the first portion. A second portion having a large width,
After the first and third lower flaps are bent toward the inside of the box at each lower side of the first and third side wall portions, the second and fourth lower flaps are connected to the second and fourth side walls. The second portion of the second and fourth lower flaps is bent toward the middle side of the box at each lower side of the portion until the second portion is folded to the inner side of the box than the first and third lower flaps. The second portion enters the inside of the box more than the first and third lower flaps, and overlaps the first portion of the second and fourth lower flaps at the first and third lower flaps. The portion being on the inner side of the box than the first portion, thereby forming the bottom of the box;
A packaging box characterized by: The packaging box according to any one of claims 1 to 8,
A packaging box characterized in that the material is cardboard.

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