JP2022025921A - Packaging box - Google Patents

Abstract

To provide a packaging box that is stably stackable after opening by reducing irregularities of appearance in a sealed state.SOLUTION: A packaging box 1 whose space for storing packed articles is formed by a plurality of wall surfaces. The packaging box 1 comprises a second wall 22 opposed to a first wall 21; a third wall 23 that connects the first wall 21 with the second wall 22; a first inner wall 14 arranged so as to overlap an inner surface of part of the first wall 21; a recess 24 to which the first inner wall 14 is exposed, that is formed by notching the part of the first wall 21; and an opening cutting line 25 for opening an opening part over a third wall 23 from the second wall 22 by cutting a range excluding part of the second wall 22, that is formed on the second wall 22 and the third wall 23. Part of the second wall 22 remains as a protrusion in an opening state of opening the opening part, and protrusions of the packaging box 1 arranged below are engaged with recesses 24 of the packaging box 1 arranged above when stacking the packaging box 1 in an upward/downward direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging box.

A box having a polyhedral compartment made of a corrugated cardboard sheet is known (Patent Document 1). The upper wall of the box is provided with a centering tab that straddles the first fold line, which is the boundary with the side wall. The tabs are folded and project from the top of the top wall. The bottom of the box is perforated with a recess that matches the shape of the protruding portion of the tab. When the boxes were stacked on top of each other, the tabs matched the recesses, the boxes were centered together, and lateral slip between the stacked boxes was prevented.

Japanese Patent No. 6290234

However, in the above-mentioned box, in the sealed state, the tabs are projected and the recesses are opened, so that there is a problem that the appearance of the box becomes conspicuous and the appearance of the box deteriorates. In addition, there is a risk that foreign matter may enter through the gaps and recesses of the tabs. Further, the above-mentioned boxes could not be stacked unless the tabs were aligned with the recesses and centered in the sealed state. That is, the above-mentioned boxes could only be stacked in bars, and could not be used for stacking methods other than bar stacking, such as alternating row stacking.

In order to solve the above problems, the present invention provides a packaging box that reduces the unevenness of the appearance in the sealed state and enables stable stacking after opening.

The present invention is a packaging box in which a space for accommodating an object to be packaged is formed by a plurality of wall surfaces, the first wall, a second wall facing the first wall, the first wall and the second wall. A third wall connecting the walls, an inner wall arranged so as to overlap at least a part of the inner surface of the first wall, and a part of the first wall are cut out to expose the inner wall. An opening formed in the second wall and the third wall, and an opening is opened from the second wall to the third wall by cutting a portion excluding a part of the second wall. The packaging is provided with a cutting line, and a part of the second wall remains as a convex portion in an opened state in which the opening is opened, and the packaging is arranged below when the packaging boxes are stacked in the vertical direction. The convex portion of the box fits into the concave portion of the packaging box located above.

In this case, it is provided at a position where it abuts against the tip of the first wall and the second wall, and at least the portion aligned with the concave portion or the convex portion is thinner than the thickness of the first wall and the second wall. A pair of formed single walls may be further provided.

The present invention is a packaging box in which a space for accommodating an object to be packaged is formed by a plurality of wall surfaces, the first wall, a second wall facing the first wall, the first wall and the second wall. A third wall connecting the walls, an inner wall fixed so as to overlap the inner surface of at least a part of the first wall, and the second wall and the third wall formed on the second wall and the second wall. The third wall is provided with an opening cutting line for opening an opening from the second wall to the third wall by cutting the third wall, and the first wall constitutes a convex portion protruding from the outer surface of the inner wall. When a part of the opening opened in the second wall forms a concave portion and the packaging boxes are stacked in the vertical direction, the convex portion of the packaging box arranged above is arranged downward. It fits into the recess of the packaging box.

In this case, in the sealed state where the opening is not opened, the first wall and the second wall form an upright side surface, the third wall constitutes the top surface, and in the opened state, the packaging. The box may be rotated 90 degrees, the first wall forming the bottom surface, and the third wall forming the side surface.

In this case, a box main body formed in a tray shape having three continuous surfaces opened by a plurality of wall bodies, the first wall, the second wall, and the third wall are provided, and the open 3 of the box main body is provided. It comprises a lid that is arranged to cover the surface and is fixed to the box body, and the first wall, the second wall, and the third wall are thicker than the thickness of the wall body of the box body. It may be formed.

According to the present invention, the unevenness of the appearance of the packaging box in the sealed state can be reduced, and the packaging boxes after opening can be stably stacked.

It is a perspective view which shows the packaging box which concerns on 1st Embodiment of this invention. It is an exploded perspective view which shows the packaging box which concerns on 1st Embodiment of this invention. It is a top view which shows the blank of the box body of the packaging box which concerns on 1st Embodiment of this invention. It is a top view which shows the blank of the lid body of the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the state which opened the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the state which made the packaging box which concerns on 1st Embodiment of this invention an exhibition posture. It is sectional drawing which shows the state in which the packaging box which concerns on 1st Embodiment of this invention is stacked. It is a perspective view which shows the packaging box which concerns on 2nd Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the state which made the packaging box which concerns on 2nd Embodiment of this invention an exhibition posture. It is a perspective view which shows the packaging box which concerns on 3rd Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the state which made the packaging box which concerns on 3rd Embodiment of this invention an exhibition posture.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Fr, Rr, L, R, U, and D shown in the drawings indicate front, rear, left, right, top, and bottom. The front-back direction, the left-right direction, and the up-down direction are orthogonal to each other. Although terms indicating directions and positions are used in the present specification, these terms are used for convenience of explanation and do not limit the technical scope of the present invention. In addition, the terms indicating the direction and position are based on the direction and position in the assembled state of the packaging box.

[First Embodiment]
The packaging box 1 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a packaging box 1. FIG. 2 is an exploded perspective view showing the packaging box 1. FIG. 3 is a plan view showing the blank 10A of the box body 10. FIG. 4 is a plan view showing the blank 20A of the lid body 20.

As shown in FIG. 1, the packaging box 1 is formed in a substantially rectangular parallelepiped shape, and a space for accommodating an object to be packaged (not shown) is formed by a plurality of wall surfaces. As shown in FIG. 2, the packaging box 1 is a corrugated cardboard box having a two-piece structure including a box body 10 and a lid 20. The box body 10 is formed in a tray shape in which three continuous surfaces (front surface, rear surface, and upper surface) are opened by a plurality of wall bodies (11 to 15). The lid 20 is arranged so as to cover the three open surfaces of the box body 10 and is fixed to the box body 10.

The box body 10 is formed by assembling the blank 10A shown in FIG. The lid 20 is formed by assembling the blank 20A shown in FIG. The blanks 10A and 20A are formed of, for example, a double-sided corrugated cardboard sheet made of paper to which a front liner 9B and a back liner 9C (see FIG. 2) are attached to the front and back of a wavy inner shin 9A. The blanks 10A and 20A are formed by punching a sheet of paper corrugated cardboard with a die or the like. The two blanks 10A and 20A are made of corrugated cardboard sheets having the same thickness. Note that FIGS. 3 and 4 show the front liner 9B side (outer surface side). In the present specification, the direction parallel to the middle shin 9A is referred to as "step direction", and the direction orthogonal to the step direction is referred to as "flow direction". “X” shown in the drawing indicates “step direction”, and “Y” indicates “flow direction”.

[Blank of the box body]
As shown in FIG. 3, the blank 10A of the box body 10 includes a bottom wall 11, a pair of side walls 12, a pair of bottom single walls 13, two pairs of first inner walls 14, and a pair of second inner walls 15. It is equipped with. The pair of side walls 12 and the pair of second inner walls 15 are formed vertically symmetrically in FIG. 3, and the pair of bottom piece walls 13 and the pair of first inner walls 14 are formed symmetrically in FIG. In the description of the above, one part will be focused on, except when it is clearly stated that the pair (or two pairs) is used.

<Bottom wall, side wall>
The bottom wall 11 is formed in a substantially rectangular shape that is long in the step direction. The pair of side walls 12 are connected to both ends of the bottom wall 11 in the step direction via the first folding curve L1. The side wall 12 is formed in a substantially rectangular shape shorter in the step direction than the bottom wall 11.

<Bottom wall>
The pair of bottom piece walls 13 are connected to both ends of the bottom wall 11 in the flow direction via the second folding curve L2. The bottom piece wall 13 is formed in a substantially rectangular shape, and the dimension (extension dimension (height)) in the flow direction thereof is set to about 1/4 of the flow direction of the bottom wall 11. Further, on both sides of the bottom piece wall 13 in the step direction, a pair of step crushing portions 16 in which the middle shin 9A is crushed in the thickness direction are provided. That is, the stepped portion 16 of the bottom piece wall 13 is formed thinner than the thickness of the other portion. In the step crushing portion 16, the middle shin 9A may be crushed from the front liner 9B side, the back liner 9C side, or both front and back sides.

<1st inner wall, 2nd inner wall 15>
The two pairs of first inner walls 14 are connected to both ends of the pair of side walls 12 in the flow direction via the second folding curve L2. The first inner wall 14 is formed in a substantially rectangular shape, and its extending dimension is substantially the same as the extending dimension of the bottom piece wall 13. The pair of second inner walls 15 are connected to the tip of the pair of side walls 12 in the step direction via the first folding curve L1. The second inner wall 15 is formed in a substantially rectangular shape, and the dimension (extended dimension) in the step direction is set shorter than the extended dimension of the second inner wall 15.

The first and second folding curves L1 and L2 are general-purpose ruled lines in which the corrugated cardboard sheet is crushed from the side of the back liner 9C in the thickness direction. The general-purpose ruled line mainly has a function of bending (normally folding) the corrugated cardboard sheet so that the back liner 9C faces inward. The first and second folding curves L1 and L2 are not limited to general-purpose ruled lines, but are lines for bending corrugated cardboard sheets such as perforations in which a plurality of cuts are formed at predetermined intervals, lead ruled lines in which perforations are formed on general-purpose ruled lines, and the like. Anything can be used as long as it is.

[Blank of lid]
As shown in FIG. 4, the blank 20A of the lid 20 includes a first wall 21, a second wall 22, and a third wall 23. The first wall 21 and the second wall 22 are arranged side by side in a row in the step direction with the third wall 23 as the center. The third wall 23 connects the first wall 21 and the second wall 22.

<1st wall, 2nd wall>
The first wall 21 and the second wall 22 are connected to both ends of the third wall 23 in the step direction via the third folding curve L3. The first wall 21 and the second wall 22 are formed in a substantially rectangular shape having substantially the same size. The dimension (height) in the step direction of the first wall 21 and the second wall 22 is approximately the length obtained by subtracting the height of the bottom single wall 13 from the dimension (height) in the step direction of the side wall 12 of the box body 10. Match.

The first wall 21 is formed with a pair of recesses 24 at positions adjacent to the third wall 23. The pair of recesses 24 are recessed so as to approach each other from both ends of the first wall 21 in the flow direction. That is, the recess 24 is formed in a substantially pentagonal shape by cutting out a part of the first wall 21.

<Third wall>
The third wall 23 is formed in a substantially rectangular shape larger than the first wall 21 and the like. The third wall 23 is formed to have substantially the same size as the bottom wall 11 of the box body 10.

<Aperture cutting line>
An opening cutting line 25 is formed on the second wall 22 and the third wall 23. The opening cutting line 25 cuts a range excluding a part of the second wall 22 and a part of the third wall 23, so that the opening 26 extends from the second wall 22 to the third wall 23 (see FIG. 5). Is provided to open the door. The opening cutting line 25 includes a push line 25A formed in a substantially U shape on the first wall 21 side of the third wall 23, and a pair of horizontal cutting lines 25B extending from the push line 25A toward both outer sides in the flow direction. And a pair of vertical cutting lines 25C extending from the tip of the pair of horizontal cutting lines 25B to the boundary with the second wall 22 (third folding curve L3), and from the tip of the pair of vertical cutting lines 25C to the second wall 22. It includes a pair of convex cutting lines 25D formed.

(Push line)
The push-in line 25A is formed in a perforated shape by arranging a plurality of cuts side by side. A push-in fold line L11 is formed between both ends of the U-shape of the push-in line 25A, and a push-in surface portion 25E is formed in an inner region surrounded by the push-in line 25A and the push-in fold line L11.

(Horizontal cutting line, vertical cutting line)
The pair of transverse cutting lines 25B are formed substantially parallel to the third folding curve L3, and extend from both ends of the third wall 23 in the flow direction to a position inside. The pair of horizontal cutting lines 25B are zippers in which a plurality of substantially Y-shaped cuts are arranged, and have a function of cutting from the center of the third wall 23 in the flow direction toward both outer sides. The pair of vertical cutting lines 25C extend along (generally parallel) both edges of the third wall 23 in the flow direction. The pair of vertical cutting lines 25C is a zipper in which a plurality of substantially L-shaped cuts are arranged, and has a function of cutting the third wall 23 from the horizontal cutting line 25B toward the convex cutting line 25D.

(Convex cutting line)
The pair of convex cutting lines 25D are formed at positions adjacent to the third wall 23 on the second wall 22. The pair of convex cutting lines 25D extends from the pair of vertical cutting lines 25C toward the tip of the second wall 22 in a substantially "<" shape, and then bends and extends to both ends of the second wall 22 in the flow direction. ing. The convex cutting line 25D is formed in a perforated shape by arranging a plurality of cuts. The convex cutting line 25D has a substantially pentagonal contour having substantially the same shape as the concave portion 24 cut out in the first wall 21. That is, the convex cutting line 25D and the concave portion 24 have complementary shapes to each other.

The third folding curve L3 and the push-in folding line L11 are general-purpose ruled lines, but are not limited to these, and may be any line such as a perforation line or a lead ruled line for bending a corrugated cardboard sheet.

[Assembly of packaging box]
Next, an example of the assembly procedure of the packaging box 1 will be described with reference to FIGS. 1 to 4. The packaging box 1 may be manually assembled by an operator, or may be assembled fully or semi-automatically by a box making machine (not shown). Here, as an example, a case where the packaging box 1 is manually assembled will be described.

The packaging box 1 is completed by forming the box body 10 from the blank 10A, forming the lid 20 from the blank 20A, and adhering (fixing) the lid 20 to the box body 10. The blank 10A of the box body 10 is set at a position to which the adhesive is attached when the box body 10 is assembled. Specifically, as shown in FIG. 3, a fourth adhesive portion 34 is set in the pair of step-crushed portions 16 of the bottom piece wall 13. Further, the back liner 9C of the blank 20A of the lid 20 is set at a position where the lid 20 is adhered to the box body 10 (a position where the adhesive is adhered). Specifically, as shown in FIG. 4, a pair of first adhesive portions 31 are set at positions aligned with the pair of recesses 24 in the step direction in the vicinity of the corner portion on the tip end side of the first wall 21. .. A pair of second adhesive portions 32 are set in a range surrounded by the third folding curve L3 and the pair of convex cutting lines 25D on both sides of the second wall 22 in the flow direction. In the third wall 23, two pairs of third adhesive portions 33 are set on both outer sides in the flow direction with respect to the pair of vertical cutting lines 25C.

As the adhesive to be adhered to the first to fourth adhesive portions 31 to 34, for example, a hot melt adhesive, an aqueous emulsion adhesive, or the like may be used, or a double-sided tape may be used.

<Assembly of the box body>
As shown in FIG. 2, the operator bends the pair of side walls 12 upward along the first folding curve L1 and the pair of first inner walls 14 inward along the second folding curve L2. Further, the operator bends the pair of bottom piece walls 13 upward along the second folding curve L2, and bends the pair of bottom piece walls 13 upward at the fourth adhesive portion 34 on the outer surface of the pair of first inner walls 14 (front liner 9B). Adhere to. Subsequently, the operator bends the pair of second inner walls 15 inward along the first folding curve L1.

As described above, the pair of side walls 12 and the pair of bottom single walls 13 are erected with respect to the bottom wall 11, and the tray-shaped box body 10 is completed. The front surface, the rear surface, and the upper surface of the box body 10 are open. The packaged object may be placed on the bottom wall 11 of the blank 10A before the assembly work is started, or may be placed on the bottom wall 11 during the assembly of the box body 10, and is completed. It may be housed in the box body 10.

<Process of fixing the lid to the box body>
The operator arranges the blank 20A above the box body 10 and adheres the third wall 23 to the outer surface of the pair of second inner walls 15 with two pairs of third adhesive portions 33 (see FIG. 1). Subsequently, the operator bends the first wall 21 downward along the third folding curve L3 (see FIG. 2), and bends the first wall 21 downward with a pair of first adhesive portions 31 and a pair of rear first inner walls 14 Adhere to the outer surface of the (see FIG. 1). Further, the operator bends the second wall 22 downward along the third folding curve L3 (see FIG. 2), and bends the second wall 22 downward with the pair of second adhesive portions 32 of the pair of first inner walls 14 in front. Adhere to the outer surface (see FIG. 1).

As described above, as shown in FIG. 1, the lid 20 is arranged so as to cover the three open surfaces of the box body 10 and is fixed to the box body 10. As a result, the packaging box 1 is completed (sealed). In such a sealed state, the second wall 22 faces the first wall 21, and the tips (lower ends) of the first and second walls 21 to 22 are abutted against the tips (upper end) of the bottom wall 13. Further, the two pairs of the first inner walls 14 are arranged so as to overlap the inner surfaces of the left and right sides (part) of the first to second walls 21 to 22. Therefore, the first inner wall 14 is exposed within the range of the recess 24 cut into the first wall 21. That is, the recess 24 is a bottomed recess. Further, between the concave portion 24 and the bottom single wall 13 (step crushed portion 16), a relative convex portion 24A which is a part of the left and right sides of the second wall 22 and protrudes from the concave portion 24 is formed. The pair of second inner walls 15 are arranged so as to overlap the inner surfaces on both the left and right sides of the third wall 23.

The above-mentioned assembly procedure of the packaging box 1 is an example, and the assembly procedure may be changed within a consistent range.

As shown in FIG. 1, the sealed packaging box 1 has the bottom wall 11 of the box body 10 as the bottom surface and the side surfaces of the first and second walls 21 to 22 (and the pair of bottom piece walls 13) upright. , The third wall 23 is stacked on a pallet (not shown) in a posture with the top surface (hereinafter, also referred to as “packaging posture”). The packaging box 1 is stored or transported in a state of being stacked on a pallet.

[Opening the packaging box]
Next, an example of the opening procedure of the packaging box 1 will be described with reference to FIGS. 5 to 7. FIG. 5 is a perspective view showing a state in which the packaging box 1 is opened. FIG. 6 is a perspective view showing a state in which the packaging box 1 is in the exhibition posture. FIG. 7 is a cross-sectional view showing a state in which the packaging boxes 1 are stacked.

The operator puts the packaging box 1 in the packaging posture, pushes in the push-in surface portion 25E (see FIG. 1) formed on the top surface (third wall 23) of the packaging box 1, cuts along the push-in line 25A, and cuts the push-in surface portion. The front side of the third wall 23 is grasped by the hand that pushed the 25E, and the third wall 23 is pulled forward. As shown in FIG. 5, the third wall 23 is cut along the pair of horizontal cutting lines 25B and then cut along the pair of vertical cutting lines 25C. Further, following the cutting of the third wall 23, the second wall 22 is cut along the pair of convex cutting lines 25D. The range surrounded by the opening cutting line 25 is removed (separated) from the second wall 22 and the third wall 23, and the opening 26 opens from the second wall 22 to the third wall 23.

As a result, the packaging box 1 is opened. In the opened state with the opening 26 opened, a part of the second wall 22 remains as a pair of convex portions 27, and a part of the third wall 23 remains as a frame portion 28. Each convex portion 27 is a range surrounded by the convex cutting line 25D and the third folding curve L3, and is adhered to the first inner wall 14 by the second adhesive portion 32 (see FIG. 1). The convex portion 27 is formed in a substantially pentagonal shape having substantially the same shape as the concave portion 24 cut out in the first wall 21. Further, between the convex portion 27 and the bottom single wall 13 (step crushed portion 16), the first inner wall 14 is exposed by removing the second wall 22, and the relative concave portion 27A recessed from the convex portion 27 or the like is exposed. Is formed. The frame portion 28 is formed in a substantially U shape in the outer range of the pair of horizontal cutting lines 25B and the pair of vertical cutting lines 25C, and is bonded to the pair of second inner walls 15 by the pair of third bonding portions 33. (See Fig. 1).

As shown in FIG. 6, in the opened packaging box 1, the first wall 21 (and the bottom one wall 13) constituting the side surface constitutes the bottom surface, and the third wall 23 constituting the top surface constitutes the front surface. It is displayed (displayed) at a store or the like in a posture rotated 90 degrees so as to constitute (side surface) (hereinafter, also referred to as "exhibition posture"). In the packaging box 1 in the exhibition posture, the opening 26 opens from the front to the upper surface, so that the customer can take out the packaged object from the opening 26.

Further, as shown in FIG. 7, the packaging boxes 1 in the display posture can be displayed in a state of being stacked in the vertical direction. When the packaging boxes 1 are stacked in the vertical direction, the convex portion 27 of the packaging box 1 arranged below (see also FIG. 6) fits into the concave portion 24 of the packaging box 1 arranged above. Further, the relative convex portion 24A of the upper packaging box 1 is arranged in the relative concave portion 27A of the lower packaging box 1, and the front end of the relative convex portion 24A abuts on the rear end of the convex portion 27. Further, the bottom piece wall 13 forming the bottom surface of the upper packaging box 1 overlaps with the bottom piece wall 13 forming the top surface of the lower packaging box 1. Therefore, the upper packaging box 1 is slightly tilted forward. Although FIG. 7 shows a state in which two packaging boxes 1 are stacked, three or more packaging boxes 1 may be stacked.

In the packaging box 1 according to the first embodiment described above, the convex portion 27 integrated with the second wall 22 in the sealed state becomes apparent when the second wall 22 is cut (opened) by the opening cutting line 25. It was configured to be a seal. According to this configuration, since the convex portion 27 does not appear in the sealed state, the unevenness of the appearance of the packaging box 1 can be reduced (see FIG. 1). Thereby, the appearance of the packaging box 1 can be improved. Further, since the recess 24 is not a through hole but a bottomed recess, it is possible to prevent foreign matter from entering the packaging box 1 from the recess 24. Further, when stacking the opened packaging boxes 1, the convex portion 27 of the lower packaging box 1 is fitted into the concave portion 24 of the upper packaging box 1, so that the packaging boxes 1 can be stably stacked (FIG. 7). reference).

Further, in the state where the opened packaging boxes 1 are stacked, the lower convex portion 27 fits into the upper concave portion 24 in the front (side of the third wall 23), while the upper and lower bottom piece walls 13 overlap each other in the rear. Therefore, it will be lifted by the thickness of one bottom wall 13. Therefore, the upper packaging box 1 is tilted downward from the rear to the front (see FIG. 7). In this respect, in the packaging box 1 according to the first embodiment, a pair of bottom piece walls 13 are provided at positions where they abut against the tips of the first wall 21 and the second wall 22, and are aligned with the concave portion 24 or the convex portion 27 (a portion aligned with the concave portion 24 or the convex portion 27. The stepped portion 16) was formed thinner than the thickness of the first wall 21 and the second wall 22. According to this configuration, it is possible to reduce the lifting when the upper and lower bottom side walls 13 are overlapped with each other, so that the inclination of the upper packaging box 1 can be made gentle. As a result, a plurality of packaging boxes 1 can be stacked substantially horizontally, and stable stacking becomes possible.

Further, in the packaging box 1 according to the first embodiment, in the sealed state in which the opening 26 is not opened, the first wall 21 and the second wall 22 form an upright side surface, and the third wall 23 is a top surface. (See Fig. 1). According to this configuration, since the bottom wall 11 and the third wall 23 do not have large irregularities (steps) in the sealed state, the surfaces without irregularities can be brought into contact with each other when the packaging boxes 1 in the packaging posture are stacked. As a result, the packaging box 1 is not stacked on the pallet in an inclined posture, and stable stacking is possible. Further, the sealed packaging box 1 can be stacked on a pallet in a rod manner or can be stacked in an alternating row. That is, the stacking method of the sealed packaging box 1 can be flexibly changed.

[Modification example]
In the packaging box 1 according to the first embodiment, the blank 10A of the box body 10 and the blank 20A of the lid 20 are formed of corrugated cardboard sheets having the same thickness, but the present invention is not limited thereto. For example, the blank 20A of the lid 20 may be formed of a corrugated cardboard sheet thicker than the blank 10A of the box body 10. That is, the first wall 21, the second wall 22, and the third wall 23 may be formed to be thicker than the wall body (11 to 15) of the box body 10. According to the packaging box 1 according to this modification, the depth of the concave portion 24 and the height of the convex portion 27 can be largely secured. As a result, when the opened packaging boxes 1 are stacked, the convex portion 27 can be securely fitted into the concave portion 24.

[Second Embodiment]
Next, the packaging box 2 according to the second embodiment will be described with reference to FIGS. 8 to 10. FIG. 8 is a perspective view showing the packaging box 2. FIG. 9 is a plan view showing the blank 2A of the packaging box 2. FIG. 10 is a perspective view showing a state in which the packaging box 2 is in the exhibition posture. In the following description, the same or corresponding configurations as those of the packaging box 1 according to the first embodiment are designated by the same reference numerals, and the same or corresponding description will be omitted.

The packaging box 1 according to the first embodiment has a two-piece structure, but the packaging box 2 according to the second embodiment is an inner glue type wraparound case (see FIG. 8).

As shown in FIG. 9, the blank 2A of the packaging box 2 includes a top wall 40, a bottom wall 41, a pair of side walls 42, a joint piece 43, two pairs of inner flaps 44, and a first outer flap 45. And a second outer flap 46 and a pair of third outer flaps 47. In the following description, a pair or two pairs of parts will be described focusing on one part, except when it is clearly stated that the parts are paired or two pairs.

The top wall 40, one side wall 42, the bottom wall 41, the other side wall 42, and the joint piece 43 are arranged in a row in the step direction and are connected to each other via the first folding curve L1. Two pairs of inner flaps 44 as an example of the inner wall are connected to both ends of the pair of side walls 42 in the flow direction via the second folding curve L2. The first outer flap 45 and the second outer flap 46 are connected to both ends of the top wall 40 in the flow direction via the second folding curve L2. The pair of third outer flaps 47 are connected to both ends of the bottom wall 41 in the flow direction via the second folding curve L2. The first to third outer flaps 45 to 47 are formed in a substantially rectangular shape of substantially the same size, and their flow direction dimensions (extended dimensions) are set to approximately half of the stepwise dimensions of the side wall 42. .. The two pairs of inner flaps 44 are formed in a substantially rectangular shape smaller than the third outer flap 47 and the like, and their extension dimensions are set to approximately half of the extension dimensions of the third outer flap 47 and the like.

A pair of concave portions 24 (a pair of relative convex portions 24A) are formed in the first outer flap 45 as an example of the first wall. In order to open an opening 26 (see FIG. 10) from the second outer flap 46 to the top wall 40 in the second outer flap 46 as an example of the second wall and the top wall 40 as an example of the third wall. The opening cutting line 25 is formed. In the opened state with the opening 26 opened, a part of the second outer flap 46 remains as a pair of convex portions 27, and a part of the top wall 40 remains as a frame portion 28 (see FIG. 10). A pair of step crushing portions 16 are provided on both sides of the third outer flap 47 in the flow direction as an example of one wall.

[Assembly of packaging box]
Next, an example of the assembly procedure of the packaging box 2 will be described.

The blank 2A of the packaging box 2 is set at a position to which the adhesive is attached when the packaging box 2 is assembled. Specifically, as shown in FIG. 9, a pair of first adhesive portions 31 are set on the first outer flap 45 (pair of relative convex portions 24A), and the second outer flap 46 (pair of convex portions 27). A pair of second adhesive portions 32 are set in the above, and a third adhesive portion 33 for adhering the joint piece 43 is set at the end portion of the top wall 40 in the step direction. Further, a fourth adhesive portion 34 is set in the step crushed portion 16 of the third outer flap 47.

The worker bends the pair of side walls 42, the top wall 40, and the joint piece 43 along the first folding curve L1 so as to wrap the packaged object arranged on the bottom wall 41, and the worker bends the pair of side walls 42, the top wall 40, and the joint piece 43 with the first folding curve L1 and via the third adhesive portion 33. The seam piece 43 is bonded to the inner surface of the top wall 40 (see FIGS. 8 and 9). Subsequently, the operator bends the two pairs of inner flaps 44 inward along the second folding curve L2, and then bends the first to third outer flaps 45 to 47 inward along the second folding curve L2. (See FIGS. 8 and 9). As shown in FIG. 8, the first to third outer flaps 45 to 47 are adhered to the outer surface of the inner flap 44 via the first, second, and fourth adhesive portions 31, 32, 34. The first to second outer flaps 45 to 46 and the pair of third outer flaps 47 are fixed to the inner flaps 44 with their tips abutting each other. The inner flap 44 is exposed within the range of the recess 24 cut into the first outer flap 45.

With the above, the packaging box 2 is completed. The sealed packaging box 2 is stacked on a pallet in a packaging posture with the bottom wall 41 as the bottom surface, the first to third outer flaps 45 to 47 as the upright side surfaces, and the top wall 40 as the top surface. The above-mentioned assembly procedure of the packaging box 2 is an example, and the assembly procedure may be changed within a consistent range.

[Opening the packaging box]
The sealed packaging box 2 is opened in the same procedure as the opening procedure of the packaging box 1 according to the first embodiment. In the opened state, a pair of convex portions 27 are exposed on the second outer flap 46, and a frame portion 28 is exposed on the top wall 40 (see FIG. 10). As shown in FIG. 10, the opened packaging box 2 is placed in a store or the like in an exhibition posture in which the first outer flap 45 constitutes the bottom surface and the top wall 40 constitutes the front surface (side surface). It will be exhibited. Similar to the packaging box 1 according to the first embodiment, the packaging boxes 2 in the exhibition posture can be stacked in the vertical direction.

According to the packaging box 2 according to the second embodiment described above, the packaging box according to the first embodiment is such that the unevenness of the appearance of the packaging box 2 in the sealed state is reduced and stable stacking is possible after opening. The same action and effect as in 1 can be obtained.

[Third Embodiment]
Next, the packaging box 3 according to the third embodiment will be described with reference to FIGS. 11 to 13. FIG. 11 is a perspective view showing the packaging box 3. FIG. 12 is a plan view showing the blank 3A of the packaging box 3. FIG. 13 is a perspective view showing a state in which the packaging box 3 is in the exhibition posture. In the following description, the same or corresponding configurations as those of the packaging boxes 1 and 2 according to the first or second embodiment are designated by the same reference numerals, and the same or corresponding description will be omitted.

The packaging box 2 according to the second embodiment is an inner glue type wraparound case, whereas the packaging box 3 according to the third embodiment is an outer glue type wraparound case (see FIG. 11).

As shown in FIG. 12, the blank 3A of the packaging box 3 includes a first side wall 50, a bottom wall 51, a second side wall 52, a top wall 53, a joint piece 54, and two pairs of inner flaps 55. , With two pairs of outer flaps 56. In the following description, a pair or two pairs of parts will be described focusing on one part, except when it is clearly stated that the parts are paired or two pairs.

The first side wall 50, the bottom wall 51, the second side wall 52, the top wall 53, and the joint piece 54 are arranged in a row in the step direction and are connected to each other via the first folding curve L1. The two pairs of inner flaps 55 are connected to both ends of the pair of first and second side walls 50 and 52 in the flow direction via the second folding curve L2. Two pairs of outer flaps 56 are connected to both ends of the bottom wall 51 and the top wall 53 in the flow direction via the second folding curve L2. The inner flap 55 and the outer flap 56 are formed in a substantially rectangular shape, and their extension dimension is set to approximately half of the dimension in the step direction such as the first side wall 50.

The passage piece 54 as an example of the first wall is formed in a substantially rectangular shape elongated in the flow direction. The joint piece 54 is adhered to the outer surface of the end portion of the first side wall 50 as an example of the inner wall, and constitutes a convex portion 27 protruding from the outer surface of the first side wall 50. The second side wall 52 as an example of the second wall and the top wall 53 as an example of the third wall are formed with an opening cutting line 57 for opening the opening 26 from the second side wall 52 to the top wall 53. Has been done. The opening cutting line 57 has a push-in line 25A (push-in folding line L11, push-in surface portion 25E), a pair of horizontal cutting lines 25B, a pair of vertical cutting lines 25C, and a concave cutting line 57D. The pair of vertical cutting lines 25C bend outward in the flow direction in the vicinity of the second side wall 52 and extend to both ends of the boundary between the top wall 53 and the second side wall 52. The concave cutting line 57D is formed in a substantially U shape (substantially V shape) so as to connect both ends of the pair of vertical cutting lines 25C. The concave cutting line 57D is configured by combining a zipper and a perforation. In the opened state with the opening 26 opened, a part of the opening 26 opened in the second side wall 52 forms a recess 24, and a part of the top wall 53 remains as a frame part 28 (see FIG. 13).

[Assembly of packaging box]
Next, an example of the assembly procedure of the packaging box 3 will be described.

The blank 3A of the packaging box 3 is set at a position to which the adhesive is attached when the packaging box 3 is assembled. Specifically, as shown in FIG. 12, a pair of first adhesive portions 31 are set on the joint piece 54, and a fourth adhesive portion 34 is set on each outer flap 56.

The worker bends the first and second side walls 50 and 52, the top wall 40, and the joint piece 54 along the first folding curve L1 so as to wrap the packaged object arranged on the bottom wall 51, and the first The joint piece 54 is bonded to the outer surface of the first side wall 50 via the bonding portion 31 (see FIGS. 11 and 12). Subsequently, the operator bends the two pairs of inner flaps 55 inward along the second folding curve L2, and then bends the two pairs of outer flaps 56 inward along the second folding curve L2 to bond the fourth. The outer flap 56 is adhered to the outer surface of the inner flap 55 via the portion 34 (see FIGS. 11 and 12). The pair of outer flaps 56 arranged one above the other are fixed to the inner flap 55 with their tips abutting each other (see FIG. 11).

With the above, the packaging box 3 is completed. The sealed packaging box 3 is stacked on a pallet in a packaging posture with the bottom wall 51 as the bottom surface, the first and second side walls 50 and 52 as the upright side surfaces, and the top wall 53 as the top surface. The above-mentioned assembly procedure of the packaging box 3 is an example, and the assembly procedure may be changed within a consistent range.

[Opening the packaging box]
The sealed packaging box 3 is opened in the same procedure as the opening procedure of the packaging box 1 according to the first embodiment. That is, the packaging box 3 is opened by cutting the second side wall 52 and the top wall 53 along the opening cutting line 57 and opening the opening 26 (see FIG. 13). In the opened state, the recess 24 is exposed on the second side wall 52, and the frame portion 28 is exposed on the top wall 53. The recess 24 is a part of the opening 26 and is a hole communicating with the inside of the packaging box 3. The recess 24 is open over the entire area of the second side wall 52 in the left-right direction. The recess 24 is shaped like a combination of a rectangle and a triangle. As shown in FIG. 13, in the opened packaging box 3, the first side wall 50 and the joint piece 54 (convex portion 27) form the bottom surface, and the top wall 53 forms the front surface (side surface) at 90 degrees. It will be exhibited (displayed) in stores, etc. in a rotated display posture. When the packaging boxes 3 are stacked in the vertical direction, the convex portion 27 of the packaging box 3 arranged above fits into the concave portion 24 of the packaging box 3 arranged below.

According to the packaging box 3 according to the third embodiment described above, the packaging box according to the first embodiment is such that the unevenness of the appearance of the packaging box 3 in the sealed state is reduced and stable stacking is possible after opening. The same action and effect as in 1 can be obtained.

The features of the packaging box 3 according to the third embodiment may be applied to the packaging boxes 1 and 2 according to the first to second embodiments (including modified examples; the same shall apply hereinafter) (not shown). ..

In the packaging boxes 1 and 2 according to the first and second embodiments, the first inner wall 14 and the inner flap 44 are overlapped with the inner surface of a part of the first wall 21 and a part of the first outer flap 45. Although arranged, the invention is not limited to this. For example, the first inner wall 14 and the like may be formed so as to overlap the entire inner surface of the first wall 21 and the like (not shown). Further, in the packaging box 3 according to the third embodiment, the first side wall 50 is arranged so as to overlap the entire inner surface of the joint piece 54, but the present invention is not limited to this, and the first side wall 50 is the joint piece. It may be formed so as to overlap the inner surface of a part of 54 (not shown). That is, the first inner wall 14 and the like may be arranged so as to overlap at least a part of the inner surface of the first wall 21 and the like.

Further, in the packaging boxes 1 and 2 according to the first and second embodiments, the concave portion 24 and the convex portion 27 are formed in a substantially pentagonal shape, but the present invention is not limited to this, and the shape is triangular, square, or circular (semi-circular). It may be formed in a circular shape) or the like (not shown). Similarly, in the packaging box 3 according to the third embodiment, the concave portion 24 and the convex portion 27 may be freely changed. Further, the concave portion 24 and the convex portion 27 do not necessarily have a complementary shape (same shape), and the convex portion 27 may have a shape that can be fitted into the concave portion 24.

Further, in the packaging boxes 1 and 2 according to the first and second embodiments, two concave portions 24 and two convex portions 27 are provided, and in the packaging box 3 according to the third embodiment, the concave portions 24 and the convex portions 27 are one. Although they are provided one by one, the present invention is not limited to this. At least one concave portion 24 and one convex portion 27 may be provided.

Further, the packaging boxes 1 to 3 according to the first to third embodiments are in the packaging posture in the sealed state, and are rotated 90 degrees after being opened to be in the display posture, but the present invention is not limited to this. The convex portion 27 (or the concave portion 24) is arranged on the top surface of the packaging boxes 1 to 3, and the concave portion 24 (or the convex portion 27) is arranged on the bottom surface of the packaging boxes 1 to 3, and the packaging posture and the exhibition posture are the same. (Not shown).

Further, in the packaging boxes 1 to 3 according to the first to third embodiments, the opening cutting lines 25 and 57 are composed of perforations and zippers, but the present invention is not limited to this, and for example, a corrugated cardboard sheet such as a half-cutting line can be used. Any line for cutting may be used (not shown). Further, in the packaging boxes 1 to 3 according to the first to third embodiments, the opening cutting lines 25 and 57 cut the range excluding a part of the third wall 23 and the top walls 40 and 53, but the third wall. It may be formed so as to cut the entire wall 23 or the like (not shown).

Further, in the packaging boxes 1 and 2 according to the first and second embodiments, the step crushed portion 16 is formed at a position aligned with the concave portion 24 or the convex portion 27, but the present invention is not limited to this. The bottom piece wall 13 and the third outer flap 47 need only be formed so that at least the portion aligned with the convex portion 27 and the like is thinner than the thickness of the first wall 21 and the first outer flap 45 and the like. For example, the bottom piece wall 13 and the like may be formed. All may be crushed (not shown).

Further, the packaging boxes 1 to 3 according to the first to third embodiments are formed of a double-sided corrugated cardboard sheet made of paper, but the present invention is not limited to this, and a single-sided corrugated cardboard sheet, a double-sided corrugated cardboard sheet, thick paper, or a resin is used. It may be made of a corrugated board (sheet) or the like. Further, the packaging boxes 1 to 3 are formed in a substantially rectangular parallelepiped shape, but the present invention is not limited to this, and a corner cut surface may be provided at the square ridgeline portion of the rectangular parallelepiped (not shown). That is, the packaging boxes 1 to 3 may be formed into a polygon such as a hexagon or an octagon when viewed from a plane or a side surface. Further, the dimensions (width, depth, height) and shape of each part of the packaging boxes 1 to 3, the thickness of the corrugated cardboard sheet, the direction in which the corrugated cardboard 9A extends, and the like may be freely changed. Further, the types of the packaging boxes 1 to 3 are not limited to the two-piece structure and the wraparound, and may be other types of boxes such as the A type.

It should be noted that the description of the above embodiment shows one aspect of the packaging box according to the present invention, and the technical scope of the present invention is not limited to the above embodiment. The technical scope of the present invention is not limited to the above embodiment. The present invention may be variously modified, replaced or modified without departing from the spirit of the technical idea, and the claims include all embodiments that may be included within the scope of the technical idea.

1,2,3 Packaging box 10 Box body 13 Bottom one wall (one wall)
14 First inner wall (inner wall)
20 Closure 21 1st wall 22 2nd wall 23 3rd wall 24 Concave 25, 57 Opening cutting line 26 Opening 27 Convex 40 Top wall (3rd wall)
44 Inner flap (inner wall)
45 1st outer flap (1st wall)
46 Second outer flap (second wall)
47 Third outer flap (one wall)
50 First side wall (inner wall)
52 Second side wall (second wall)
53 Top wall (third wall)
54 Substitute piece (1st wall)

Claims (5)

A packaging box (1, 2) in which a space for accommodating an object to be packaged is formed by a plurality of wall surfaces.
The first wall (21, 45) and
The second wall (22,46) facing the first wall and
A third wall (23, 40) connecting the first wall and the second wall,
An inner wall (14,44) arranged so as to overlap the inner surface of at least a part of the first wall,
A recess (24) formed by cutting out a part of the first wall and exposing the inner wall,
An opening formed in the second wall and the third wall, and by cutting a range excluding a part of the second wall, an opening (26) is opened from the second wall to the third wall. With a cutting line (25),
In the opened state with the opening opened, a part of the second wall remains as a convex portion (27).
When the packaging boxes are stacked in the vertical direction, the convex portion of the packaging box arranged below fits into the concave portion of the packaging box arranged above. It is provided at a position where it abuts against the tip of the first wall and the second wall, and at least a portion aligned with the concave portion or the convex portion is formed to be thinner than the thickness of the first wall and the second wall. The packaging box according to claim 1, further comprising a pair of single walls (13, 47). A packaging box (3) in which a space for accommodating an object to be packaged is formed by a plurality of wall surfaces.
First wall (54) and
The second wall (52) facing the first wall and
A third wall (53) connecting the first wall and the second wall,
An inner wall (50) fixed so as to overlap the inner surface of at least a part of the first wall,
An opening cutting line formed on the second wall and the third wall to open an opening (26) from the second wall to the third wall by cutting the second wall and the third wall. (57) and
The first wall constitutes a convex portion (27) protruding from the outer surface of the inner wall.
A part of the opening opened in the second wall constitutes a recess (24), and the recess (24) is formed.
When the packaging boxes are stacked in the vertical direction, the convex portion of the packaging box arranged above fits into the concave portion of the packaging box arranged below. In the sealed state in which the opening is not opened, the first wall and the second wall form an upright side surface, and the third wall constitutes a top surface.
The invention according to any one of claims 1 to 3, wherein in the opened state, the packaging box is rotated 90 degrees, the first wall constitutes a bottom surface, and the third wall constitutes a side surface. Packaging box. A box body (10) formed in a tray shape with three consecutive faces open by a plurality of walls (11 to 15), and a box body (10).
The first wall, the second wall, and the third wall are provided, and a lid (20) arranged so as to cover the three open surfaces of the box body and fixed to the box body is provided.
The first wall, the second wall, and the third wall are formed to be thicker than the thickness of the wall body of the box body, according to any one of claims 1 to 4. Packaging box.

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