JP6891064B2 - Packaging box - Google Patents

Description

The present invention relates to a packaging box.

Packaging boxes that can be easily opened are known.

For example, the packaging box with an opening assist function described in Patent Document 1 has a lid piece connected to one side surface of the box body to close the opening of the box body and an inner lid to which the lid piece is glued (bonded). A pair of flaps formed inside the lid piece, a flap formed inside the lid piece, a break portion sandwiched between a pair of notch lines formed in the lid piece, and a pair of flaps formed apart from the crease line between the flap and the side surface. It is equipped with an opening auxiliary folding line. When this packaging box is in the assembled state, an opening auxiliary surface chamfered by a pair of opening auxiliary folding ruled lines is formed at a corner portion having a folding ruled line as an apex, and an end portion of the broken portion faces the opening auxiliary surface. A space is formed between the end of the broken portion and the opening auxiliary surface so that the user can easily insert a finger and pick the broken portion.

Japanese Patent No. 4303990

However, in the above-mentioned packaging box, the opening auxiliary surface only chamfers the corners, so depending on the chamfering range (size), a sufficient space between the end of the broken portion and the opening auxiliary surface is sufficient. In some cases, it could not be secured.

In order to solve the above problems, the present invention provides a packaging box that can be easily opened by forming a large space between the first wall and the opening surface.

In order to achieve the above object, the packaging box of the present invention has a first wall, a second wall provided in a posture capable of intersecting the first wall, and a polygonal curve at the end of the second wall. A third wall, which is provided in a state of being connected to each other and adhered to the inner surface of the first wall, and the second wall and the third wall are formed along the polygonal curve, and the second wall and the third wall are formed. A pair of opening folding lines forming a chamfered opening surface at a corner formed by the third wall, and at least one of the second wall and the third wall outside the opening surface, the opening is formed. When the surface is pushed inward, the peeling assisting portion for partitioning the peeling assisting region to be pushed together with the opening surface so as to peel off the third wall from the first wall is provided.

In this case, the peeling auxiliary portion is preferably formed so as to surround the opening folding line, and is a peeling auxiliary folding line for causing a mountain fold of at least one of the second wall and the third wall.

In other cases, the second wall and the third wall are composed of a corrugated cardboard sheet, and the peeling auxiliary portion compresses the corrugated cardboard sheet from both sides in the peeling auxiliary region surrounding the opening folding line to crush the inner fold. It is preferably a corrugated cardboard section.

In this case, it is preferable that the first wall is formed with a notch portion that faces the opening surface and exposes the opening surface.

In this case, the pair of the first walls arranged to face each other and the pair of the second walls arranged to face each other at positions adjacent to the pair of first walls are formed on one of the second walls. A tubular peripheral wall having both ends opened is formed in a state where the connected third wall is adhered to one of the first walls, and a pair of inner flaps are connected to both ends of the second wall. A pair of outer flaps that close the openings at both ends of the peripheral wall while being adhered to the inner flaps are connected to both ends of the first wall, and the first wall or the first wall to which the third wall is adhered is connected. At the boundary between the first wall and the pair of outer flaps, or at the pair of outer flaps, a pair of cutting lines for separating the first wall peeled from the third wall from the pair of outer flaps are formed. It is preferable that it is.

In other cases, the first wall or the first wall is further provided with a fourth wall provided in a state of being connected to the first wall in a posture capable of intersecting the first wall and the second wall. It is preferable that a cutting line is formed at the boundary between the wall and the fourth wall, or at the fourth wall, to separate the first wall peeled from the third wall from the fourth wall.

In this case, a pair of first auxiliary ruled lines extending from the vicinity of the opening surface in the direction opposite to the bonding position of the third wall are formed on the first wall, and the first wall is the third wall. It is preferable that the material is peeled off from the material and cut at the cutting line while making a mountain fold along the pair of first auxiliary ruled lines.

In this case, the first wall has a pair of second auxiliary ruled lines extending in a direction opposite to the bonding position of the third wall while being inclined in a direction approaching each other from both outer sides at a position separated from the third wall. Is formed, and the first wall is preferably peeled off from the third wall and cut at the cutting line while making a valley fold along the pair of second auxiliary ruled lines.

According to the present invention, the packaging box can be easily opened by forming a large space between the first wall and the opening surface.

It is a perspective view which shows the packaging box which concerns on one Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on one Embodiment of this invention. It is a top view which shows the joint side of the blank of the packaging box which concerns on one Embodiment of this invention. It is a perspective view which shows the state which pushed the opened surface of the packaging box which concerns on one Embodiment of this invention. It is a perspective view which shows the middle of opening of the packaging box which concerns on one Embodiment of this invention. It is a perspective view which shows the state which opened the packaging box which concerns on one Embodiment of this invention. It is a perspective view which shows the state which disassembled the packaging box which concerns on one Embodiment of this invention. It is a top view which shows the joint side of the blank of the packaging box which concerns on 1st modification of one Embodiment of this invention. FIG. 8 is a cross-sectional view taken along the line IX-IX of FIG. It is a top view which shows the joint side of the blank of the packaging box which concerns on the 2nd modification of one Embodiment of this invention. It is a top view which shows the joint side of the blank of the packaging box which concerns on the 3rd modification of one Embodiment of this invention. It is a top view which shows the top wall side of the blank of the packaging box which concerns on 4th modification of one Embodiment of this invention. It is a top view which shows the top wall side of the blank of the packaging box which concerns on 5th modification of one Embodiment of this invention. It is a top view which shows the top wall side of the blank of the packaging box which concerns on 6th modification of one Embodiment of this invention. It is a top view which shows the top wall side of the blank of the packaging box which concerns on 7th modification of one Embodiment of this invention. It is a perspective view which shows the packaging box which concerns on 8th modification of one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In this specification, terms indicating directions and positions are used for convenience of explanation, but these terms do not limit the technical scope of the present invention.

[Outline of packaging box]
The packaging box 1 will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing a packaging box 1. FIG. 2 is a plan view showing a blank 5 of the packaging box 1. FIG. 3 is a plan view showing the joint piece 14 side of the blank 5 of the packaging box 1. In addition, "D" shown in FIG. 1 and the like indicates "length direction", "W" indicates "width direction", and "H" indicates "height direction (vertical direction)".

As shown in FIG. 1, the packaging box 1 is formed in a substantially rectangular parallelepiped shape that is long in the length direction. The packaging box 1 is a wraparound type case that is sealed by bending it so as to wrap the contents (not shown) and pasting the ends together. The contents are, for example, cans, bottles, resin containers, and the like filled with food (beverages) and the like, but are not limited thereto.

The packaging box 1 is formed by assembling the blank 5 shown in FIG. The blank 5 is formed by punching, for example, a sheet of paper corrugated cardboard with a die cutter or the like. The corrugated cardboard sheet is, for example, a double-sided corrugated cardboard sheet in which a front liner 9B and a back liner 9C (see FIG. 6) are bonded to both sides of a corrugated cardboard 9A. Note that FIG. 2 shows the front liner 9B side (outer surface side of the packaging box 1). In the present specification, the direction parallel to the corrugated cardboard sheet 9A is referred to as the "step direction", and the direction orthogonal to the step direction is referred to as the "flow direction". “X” shown in the drawing indicates “step direction”, and “Y” indicates “flow direction”.

[blank]
As shown in FIG. 2, the blank 5 includes a top wall 10, a first side wall 11, a bottom wall 12, a second side wall 13, a joint piece 14, a pair of first inner flaps 15, and a pair. It includes a second inner flap 16, a pair of first outer flaps 17, and a pair of second outer flaps 18.

The top wall 10, the first side wall 11, the bottom wall 12, the second side wall 13, and the joint piece 14 are connected in a row from one side to the other in this order. These walls and the like 10 to 14 are formed in a substantially rectangular shape having substantially the same dimensions in the flow direction. The top wall 10 and the bottom wall 12 as an example of the first wall are set to have substantially the same dimensions in the step direction. As an example of the second wall, the first side wall 11 and the second side wall 13 are set to have substantially the same dimensions in the step direction, and are set longer in the step direction than the top wall 10 and the like. The dimension of the joint piece 14 in the step direction is set shorter than the dimension of the bottom wall 12 in the step direction.

A first ruled line L1 is formed at each boundary of these walls 10 to 13. A notch 20 is cut out in a substantially trapezoidal shape at one end of the top wall 10 in the step direction and at the center in the flow direction. The notch portion 20 is formed so as to be recessed from one end in the step direction of the top wall 10 toward the other. Further, a pair of first auxiliary ruled lines L11 and a pair of second auxiliary ruled lines L12 are formed on the top wall 10. The pair of first auxiliary ruled lines L11 are formed on one side (notch portion 20 side) of the top wall 10 in the step direction. The pair of first auxiliary ruled lines L11 are inclined so as to be separated from each other from one of the step directions toward the other. The pair of second auxiliary ruled lines L12 are formed on the other side (first side wall 11 side) of the top wall 10 in the step direction. The pair of second auxiliary ruled lines L12 are inclined so as to approach each other from one of the step directions toward the other.

The first ruled line L1 and the first auxiliary ruled line L11 are general-purpose ruled lines formed by crushing a corrugated cardboard sheet from the back liner 9C side in the thickness direction, respectively. On the other hand, the second auxiliary ruled line L12 is a reverse ruled line formed by crushing a corrugated cardboard sheet from the front liner 9B side in the thickness direction.

The joint piece 14 as an example of the third wall is formed in a state of being connected to the other end of the second side wall 13 in the flow direction via the first ruled line L1 (folded curve). A pair of opening folding lines 21 are formed along the first ruled line L1 on the second side wall 13 and the joint piece 14. The pair of opening folding lines 21 are formed at a substantially central portion in the flow direction near the boundary between the second side wall 13 and the joint piece 14. The pair of opening folding lines 21 are formed on the second side wall 13 and the joint piece 14 so as to be separated from the first ruled line L1 on both sides in the step direction. The pair of opening folding lines 21 are arranged symmetrically with respect to the first ruled line L1. The first ruled line L1 is not formed between the pair of open folding lines 21.

Specifically, as shown in FIG. 3, the pair of opening folding lines 21 includes a straight line portion 21A and a pair of inclined line portions 21B, respectively. The straight line portion 21A extends in parallel with the first ruled line L1. The pair of inclined line portions 21B extend diagonally outward from both ends of the straight line portion 21A toward the first ruled line L1. The pair of opening folding lines 21 form a substantially hexagonal contour elongated in the flow direction. A substantially hexagonal opening surface 22 is formed inside the pair of opening folding lines 21. The opening surface 22 has a pair of intersecting line portions 22A formed between both end portions of the pair of straight line portions 21A facing each other. At both ends of the intersection line portion 22A, a bend between the straight line portion 21A and the inclined line portion 21B is connected to a portion (bent portion). The opening folding line 21 (straight line portion 21A, inclined line portion 21B) and the crossing line portion 22A are general-purpose ruled lines, respectively.

On the second side wall 13, a peeling auxiliary folding line 23 as an example of the peeling assisting portion is formed at a position outside the opening surface 22. The peeling auxiliary folding line 23 is formed so as to surround the opening folding line 21 formed on the second side wall 13. The peeling auxiliary folding line 23 is a general-purpose ruled line for making the second side wall 13 fold. Although the details will be described later, the peeling auxiliary folding line 23 partitions the peeling auxiliary region 24 pushed together with the opening surface 22 between the opening folding line 21 formed on the second side wall 13 and the opening folding line 21. The peeling auxiliary folding line 23 includes one point (apex) separated from the substantially center of the flow direction of the opening folding line 21 formed on the second side wall 13 in one step direction (bottom wall 12 side), and both ends of the opening folding line 21 in the flow direction. It is formed in a substantially V shape by connecting two points separated from each other on the outside. That is, the peeling auxiliary region 24 is formed in a substantially V shape (substantially triangular shape) so as to surround the opening folding line 21. Both ends of the peeling auxiliary folding line 23 in the flow direction are slightly separated from the first ruled line L1 (not in contact with the first ruled line L1), but are not limited to this and are in contact with the first ruled line L1. You may.

At the tip of the top wall 10 (adhesive position where the joint piece 14 is adhered) and the joint piece 14 (excluding the opening surface 22), the corrugated cardboard sheet is compressed from both sides to crush the inner shin 9A. ing. That is, the tip portion of the top wall 10 and the joint piece 14 are formed thinner than the other portions.

As shown in FIG. 2, the pair of first inner flaps 15 are provided in a state of being connected to both ends of the first side wall 11 in the flow direction via the second ruled line L2. The pair of second inner flaps 16 are provided in a state of being connected to both ends of the second side wall 13 in the flow direction via the second ruled line L2. The inner flaps 15 and 16 are formed in a substantially rectangular shape having the dimension (second ruled line L2) in the step direction of the side walls 11 and 13 as the long side. The flow direction dimension (extension dimension) of each of the inner flaps 15 and 16 is set to be substantially half of the stepwise dimension of the top wall 10 (bottom wall 12). The second ruled line L2 is a general-purpose ruled line.

The pair of first outer flaps 17 are provided in a state of being connected to both ends of the top wall 10 in the flow direction via the first cutting line 31. The first outer flap 17 is formed in a substantially rectangular shape having a dimension (first cutting line 31) in the step direction of the top wall 10 as a long side. The dimension (extension dimension) of the first outer flap 17 in the flow direction is set to be substantially the same as the extension dimension of each of the inner flaps 15 and 16.

The pair of first cutting lines 31 extend in the step direction at the boundary between the top wall 10 and the pair of first outer flaps 17. The first cutting line 31 is a zipper formed by arranging a plurality of refracted cuts through which a blade is penetrated in the thickness direction of a corrugated cardboard sheet at substantially equal intervals. The cut of the first cutting line 31 consists of a cut body extending in the cutting direction (step direction) and a guide line extending diagonally from the upstream end of the cut body in the cutting direction (one of the step directions) toward the top wall 10. Includes.

Further, a second cutting line 32 extends in the flow direction at substantially the center of the first outer flap 17 in the step direction. The second cutting line 32 is formed between the first cutting line 31 and the tip of the first outer flap 17 so as to substantially bisect the first outer flap 17 in the step direction. The second cutting line 32 is a zipper formed by arranging a plurality of substantially Y-shaped cuts at substantially equal intervals. The cut of the second cutting line 32 consists of a cut main body extending in the cutting direction (flow direction) and two diagonal cuts extending diagonally from the upstream end (first cutting line 31 side) of the cut main body in the cutting direction. Includes guide lines and. One of the two guide wires is separated from the cut body.

The pair of second outer flaps 18 are provided in a state of being connected to both ends of the bottom wall 12 in the flow direction via the second ruled line L2. The second outer flap 18 is formed in a substantially rectangular shape having a dimension (second ruled line L2) in the step direction of the bottom wall 12 as a long side. To be precise, the outer side of the second outer flap 18 in the step direction is formed so as to gradually narrow toward the tip. The dimension (extended dimension) of the second outer flap 18 in the flow direction is set to be slightly shorter than the extended dimension of the first outer flap 17. The extension dimension of the second outer flap 18 may be set to be substantially the same as the extension dimension of the first outer flap 17. Further, the second outer flap 18 may be formed in substantially the same square shape as the first outer flap 17.

Further, a third cutting line 33 extends in the flow direction at substantially the center of the second outer flap 18 in the step direction. The third cutting line 33 is formed between the second ruled line L2 and the tip of the second outer flap 18 so as to substantially bisect the second outer flap 18 in the step direction. The third cutting line 33 is a zipper formed by arranging a plurality of substantially Y-shaped cuts at substantially equal intervals. The cut of the third cutting line 33 extends diagonally so as to spread from the cut main body extending in the cutting direction (flow direction) and the upstream end (tip side of the second outer flap 18) of the cut main body in the cutting direction. Includes book guides. One of the two guide wires is separated from the cut body.

Further, at the boundary between the second outer flap 18 and the bottom wall 12, two full-cut lines 34 are formed along the second ruled line L2. The full cut line 34 is a cut through which the blade is penetrated in the thickness direction of the corrugated cardboard sheet. The two total cutting lines 34 are formed in the vicinity of the third cutting line 33 at positions facing each other with the third cutting line 33 in between.

[Assembly of packaging box (sealing)]
Next, the assembly process of the packaging box 1 (procedure for sealing the packaging box 1) will be described.

The packaging box 1 is assembled by appropriately bending a blank 5 with the back liner 9C facing upward. The packaging box 1 may be manually assembled by the user, or may be fully or semi-automatically assembled by a packaging device (wraparound caser). Here, as an example, a case where the packaging device (not shown) assembles the packaging box 1 fully automatically will be described.

In the packaging device, the first side wall 11 is bent at a substantially right angle along the first ruled line L1, and a plurality of accumulated contents are placed on the bottom wall 12. Subsequently, the packaging device bends the second side wall 13 and the joint piece 14 at a substantially right angle along the first ruled line L1 and applies an adhesive to the surface of the joint piece 14. The packaging device bends the top wall 10 at a substantially right angle along the first ruled line L1 and superimposes the tip end portion of the top wall 10 on the joint piece 14 (see FIG. 1). In this state, the contents are wrapped in the peripheral wall 1A. As the adhesive, for example, a hot melt adhesive, a synthetic resin emulsion adhesive, a double-sided tape, or the like can be used. Further, the adhesive may be applied to a plurality of places at predetermined intervals in the length direction, or may be applied in a straight line continuous in the length direction.

As described above, the top wall 10 and the bottom wall 12 are arranged to face each other, and the first side wall 11 and the second side wall 13 are arranged to face each other. Further, the passage piece 14 is adhered to the inner surface of the top wall 10 via an adhesive (see FIG. 1). In a state where the joint piece 14 connected to the second side wall 13 is adhered to the top wall 10, a substantially square tubular peripheral wall 1A having both end faces in the length direction is formed. Since the tip of the top wall 10 and the joint piece 14 are crushed in a stepped manner, an increase in the thickness of the bonded portion is suppressed.

Further, as shown in FIG. 1, the second side wall 13 and the joint piece 14 are mountain-folded along a pair of opening folding lines 21. Therefore, a chamfered opening surface 22 is formed between the pair of opening folding lines 21 at a corner formed by the second side wall 13 and the joint piece 14. Further, the notch portion 20 formed in the top wall 10 is arranged so as to face the opening surface 22 and exposes the opening surface 22. Further, in the top wall 10, the pair of first auxiliary ruled lines L11 extend from the vicinity of the opening surface 22 in the direction opposite to the bonding position of the joint piece 14. The pair of second auxiliary ruled lines L12 are inclined from the opening sides (both outer sides in the width direction) at both ends of the peripheral wall 1A at a position separated from the joint piece 14, and are opposite to the bonding position of the joint piece 14. It extends in the direction.

Next, the packaging device bends the pair of first inner flaps 15 and the pair of second inner flaps 16 connected to both ends of the side walls 11 and 13 in the length direction inward along the second ruled line L2. In addition, the packaging device applies an adhesive to appropriate locations on the surfaces of the inner flaps 15 and 16. In this state, the first inner flap 15 and the second inner flap 16 abut their tip portions substantially at the center in the width direction (see FIG. 1).

Next, the packaging device bends the pair of first outer flaps 17 and the pair of second outer flaps 18 connected to both ends of the top wall 10 and the bottom wall 12 in the length direction inward along the second ruled line L2. , The outer flaps 17 and 18 are superposed on the inner flaps 15 and 16 (see FIG. 1). The outer flaps 17 and 18 are adhered to the inner flaps 15 and 16 via an adhesive. The outer flaps 17 and 18 close the openings at both ends of the peripheral wall 1A in a state of being adhered to the inner flaps 15 and 16. In this state, the tip of the first outer flap 17 and the tip of the second outer flap 18 are separated from each other (see FIG. 1). The first outer flap 17 and the second outer flap 18 may be formed to have a length such that the tip portions thereof abut against each other.

As a result, as shown in FIG. 1, the packaging box 1 is in a sealed state. In this state, a pair of first cutting lines 31 are formed at the boundary (corner portion) between the top wall 10 to which the passage piece 14 is adhered and the pair of first outer flaps 17. Further, the second cutting line 32 of the first outer flap 17 and the third cutting line 33 of the second outer flap 18 are arranged on substantially the same straight line at substantially the center in the width direction.

[Opening the packaging box]
Next, the opening step (opening procedure) of the packaging box 1 will be described with reference to FIGS. 4 to 6. FIG. 4 is a perspective view showing a state in which the opening surface 22 of the packaging box 1 is pressed. FIG. 5 is a perspective view showing the middle of opening the packaging box 1. FIG. 6 is a perspective view showing a state in which the packaging box 1 is opened.

The packaging box 1 is opened by cutting the top wall 10 peeled off from the passage piece 14 along the pair of first cutting lines 31 and separating it from the pair of first outer flaps 17. In order to peel off the top wall 10 from the joint piece 14 against the adhesive force of the adhesive, it is important to firmly grasp the top wall 10. Therefore, in this packaging box 1, a space S for gripping the top wall 10 is formed below the notch portion 20.

As shown in FIG. 4, the user pushes the opening surface 22 (near the center) exposed from the notch 20 with a finger (see the black arrow in FIG. 4). The opening surface 22 is pushed into the peripheral wall 1A while bending at the pair of intersecting line portions 22A. As the opening surface 22 is pushed in, the second side wall 13 begins to fold along the peeling auxiliary fold line 23. Then, the peeling auxiliary region 24 starts to be pushed together with the opening surface 22 so as to peel off the joint piece 14 from the top wall 10. That is, as the opening surface 22 is pushed in, the opening surface 22 and the peeling auxiliary region 24 are recessed inward, so that the vicinity of the center of the joint piece 14 connected to the opening surface 22 is pulled downward. Then, the vicinity of the center of the joint piece 14 is peeled off from the inner surface of the top wall 10, and a space S for putting a hand below the notch 20 of the top wall 10 is formed.

Next, as shown in FIG. 5, the user puts a hand (fingertip) in the space S, grasps the vicinity of the notch 20 of the top wall 10, and pulls up the top wall 10 (black arrow in FIG. 5). reference). Then, the top wall 10 is peeled off from the joint piece 14 (bonding is released), and a pair of mountain folds along the pair of first auxiliary ruled lines L11 and a valley fold along the pair of second auxiliary ruled lines L12. It is cut at the first cutting line 31 of.

As shown in FIG. 6, the user separates the top wall 10 from the pair of first outer flaps 17 and rotates the top wall 10 around the boundary (first ruled line L1) with the first side wall 11 (blackened in FIG. 6). See arrow). As a result, the entire one surface (top surface) of the peripheral wall 1A is opened, and the contents can be taken out. That is, the packaging box 1 is in an opened state. The top wall 10 separated from the first outer flap 17 remains connected to the upper end of the first side wall 11.

[Disassembly of packaging box]
Next, the disassembling process (disassembling (deployment) procedure) of the packaging box 1 will be described with reference to FIGS. 6 and 7. FIG. 7 is a perspective view showing a state in which the packaging box 1 is disassembled.

After taking out all the contents, the packaging box 1 is stored in a disassembled state so as not to be bulky, and is collected as waste at predetermined intervals. When disassembling the packaging box 1, the user cuts the first outer flap 17 along the second cutting line 32 and the second outer flap 18 along the third cutting line 33 (see FIG. 6). The first outer flap 17 is divided into two in a state of being adhered to the first inner flap 15 and the second inner flap 16. Similarly, the second outer flap 18 is divided into two in a state of being adhered to the first inner flap 15 and the second inner flap 16.

After that, the user cuts the second outer flap 18 divided by the third cutting line 33 along the second ruled line L2 while using the full cutting line 34 (see FIG. 6). As a result, the packaging box 1 is in an unfolded (disassembled) state (see FIG. 7). A plurality of unfolded packaging boxes 1 will be stacked and stored until they are discarded (recovered).

In the packaging box 1 according to the present embodiment described above, the top wall 10 (first wall) constituting the top surface (one surface) of the peripheral wall 1A is provided in a posture capable of intersecting the top wall 10 (top wall). The opening surface 22 is adhered to the joint piece 14 extending from the second side wall 13 (second wall) (which constitutes the side surface (other surface) of the peripheral wall 1A intersecting 10), and the opening surface 22 is the second side wall 13 and the joint piece 14. It was configured to be formed at the corners of and. Further, the peeling auxiliary region 24 is formed between the opening folding line 21 and the peeling auxiliary folding line 23, and when the opening surface 22 is pushed into the peripheral wall 1A, it is pushed into the peripheral wall 1A integrally with the opening surface 22. It was configured to be. According to this configuration, since the peripheral portion of the opening surface 22 including the peeling auxiliary region 24 is greatly recessed, a part of the joint piece 14 connected to the opening surface 22 can be peeled (separated) from the top wall 10 (separation). (See FIG. 4). Further, since a large space S is formed between the top wall 10 and the opening surface 22, the user can easily grip the top wall 10, and as a result, the top wall 10 can be easily peeled off from the joint piece 14. As a result, the packaging box 1 can be easily opened.

Further, in this packaging box 1, since the top wall 10 is peeled off from the joint piece 14 and the top wall 10 is opened in a state of being connected to the first side wall 11, the packaging box 1 may be divided into a plurality of pieces after opening. Not available (see Figure 6). As a result, it is possible to prevent the generation of fine waste separated from the packaging box 1 after opening, and for example, it is possible to reduce the time and effort required for collecting the waste. Since the top wall 10 has a relatively large area forming one surface of the peripheral wall 1A, the top wall 10 is separated (cut) from the first side wall 11 if it is not regarded as fine waste. It doesn't matter.

Further, in the packaging box 1 according to the present embodiment, the pair of opening folding lines 21 form a substantially hexagonal opening surface 22, and the pair of intersecting line portions 22A sandwich the opening surface 22 with a substantially quadrangular region. The structure is divided into a substantially triangular area. According to this configuration, the opening surface 22 can be easily pushed in while making a valley fold at the pair of intersecting line portions 22A (see FIG. 4). As a result, a large space S for the user to grip the top wall 10 can be easily formed between the top wall 10 and the opening surface 22.

Further, in the packaging box 1 according to the present embodiment, since the opening surface 22 is exposed to the notch 20 of the top wall 10, the user can easily visually recognize the opening surface 22 and the top wall 10 can be seen. The opening surface 22 can be appropriately pushed without interference.

Further, in the packaging box 1 according to the present embodiment, the top wall 10 is cut along the pair of first cutting lines 31 and separated from the pair of first outer flaps 17. According to this configuration, since substantially the entire top surface (one surface) of the peripheral wall 1A is open (see FIG. 6), the contents can be easily taken out from the inside of the opened packaging box 1.

Further, in the packaging box 1 according to the present embodiment, the top wall 10 is configured to have a mountain fold at the first auxiliary ruled line L11 and a valley fold at the second auxiliary ruled line L12 (see FIG. 5). According to this configuration, the top wall 10 can be easily cut with a small force as compared with the case where the auxiliary ruled lines L11 and L12 are omitted.

In the packaging box 1 according to the present embodiment, the peeling auxiliary folding line 23 as an example of the peeling auxiliary portion is a general-purpose ruled line formed on the second side wall 13, but the present invention is not limited to this. For example, as shown in FIGS. 8 and 9, as another example of the peeling assisting portion, the step crushing portion 25 in which the corrugated cardboard sheet is compressed from both sides in the peeling assisting region 24 to crush the inner shin 9A may be used. That is, the thickness of the peeling auxiliary region 24 (step crushed portion 25) may be formed to be thinner than the thickness of other portions. In FIG. 8, hatching is attached to the portion where the middle shin 9A is crushed. According to this configuration, since the rigidity (waist) of the paper corrugated cardboard sheet is lowered by the step crushing portion 25, the peeling auxiliary region 24 can be bent along the contour of the step crushing portion 25. As a result, the opening surface 22 and the peeling auxiliary region 24 can be largely recessed, a part of the joint piece 14 can be peeled off from the top wall 10, and the user can easily grip the top wall 10. The same actions and effects as those of the invention according to the above can be obtained. In the description of this first modification (the same applies to the description of other modifications below), the same reference numerals are given to the same configurations as those of the packaging box 1 according to the above-described embodiment, and the same reference numerals are given to the packaging box 1. The description of the same configuration or the corresponding configuration is omitted.

Further, in the packaging box 1 (including the first modification) according to the present embodiment, the peeling auxiliary folding line 23 and the step crushing portion 25 are formed on the second side wall 13, but the present invention is not limited to this. For example, as shown in FIG. 10, the peeling auxiliary folding line 23 of the packaging box 1 according to the second modification may be formed on the joint piece 14 so as to surround the opening folding line 21 on the joint piece 14 side. .. In addition, as shown in FIG. 11, as the packaging box 1 according to the third modification, the second side wall so that the pair of peeling auxiliary folding lines 23 surrounds the pair of opening folding lines 21 (opening surface 22). It may be formed on the 13 and the passage piece 14. That is, the peeling auxiliary folding line 23 may be formed on at least one of the second side wall 13 and the joint piece 14 in order to cause a mountain fold of at least one of the second side wall 13 and the joint piece 14. .. Although the peeling auxiliary folding line 23 is shown in FIGS. 10 and 11, the step crushing portion 25 according to the first modification may be formed at the same position instead of the peeling auxiliary folding line 23.

Further, in the packaging box 1 according to the present embodiment (including the first to third modified examples; the same applies hereinafter), the peeling auxiliary folding line 23 projects from the vicinity of the first ruled line L1 toward the center side of the second side wall 13. Although it was formed in a substantially V shape, the present invention is not limited to this. For example, although not shown, the peeling auxiliary folding line 23 may be formed in a substantially U-shape, a substantially quadrangular shape, a substantially trapezoidal shape, a substantially semicircular shape (a substantially semi-elliptical shape), or the like.

Further, in the packaging box 1 according to the present embodiment, the opening folding line 21 is composed of a straight line portion 21A and a pair of inclined line portions 21B, but the present invention is not limited to this. For example, the opening folding line 21 may be composed of the straight line portion 21A by omitting the pair of inclined line portions 21B. In this case, the opening surface 22 is formed in a substantially quadrangular shape. Further, for example, although not shown, the opening folding line 21 may be formed in a substantially arc shape. In this case, the opening surface 22 is formed in a substantially circular shape (substantially elliptical shape).

Further, in the packaging box 1 according to the present embodiment, the intersecting line portion 22A is formed between the ends of the pair of straight portions 21A (see FIG. 3), but the present invention is not limited to this, and the length direction (flow direction) is not limited to this. ) It may be shifted inward or outward. Further, both ends of the crossing line portion 22A are connected to the bent portion of the straight line portion 21A and the inclined line portion 21B, but the present invention is not limited to this, and the crossed line portion 22A may be slightly separated from the bent portion. Further, the intersection line portion 22A is a general-purpose ruled line, but the present invention is not limited to this, and a reverse ruled line may be used. Further, the intersection line portion 22A may be omitted.

Further, in the packaging box 1 according to the present embodiment, the opening surface 22 (a pair of opening folding lines 21) and the peeling auxiliary region 24 (peeling auxiliary folding line 23, step crushing portion 25) are formed at one place. Not limited to this, it may be formed at a plurality of places. Further, the opening surface 22 and the like are formed at a substantially central portion in the length direction, but the present invention is not limited to this, and the opening surface 22 and the like may be formed at a position deviated from the center in the length direction. Further, the opening surface 22 and the like may be formed over the entire length direction.

Further, in the packaging box 1 according to the present embodiment, the first ruled line L1, the second ruled line L2, the opening folding line 21, the crossing line portion 22A, and the peeling auxiliary folding line 23 are general-purpose ruled lines, respectively. Not limited to. For example, these first ruled lines L1 and the like may be fold curves for bending a corrugated cardboard sheet such as a reed ruled line or a sewing machine line in which a plurality of cutting lines are formed on a general-purpose ruled line at predetermined intervals.

Further, in the packaging box 1 according to the present embodiment, a pair of first cutting lines 31 are formed at a boundary (corner portion) between the top wall 10 and the pair of first outer flaps 17, but this is the present invention. Not limited to. For example, as shown in FIG. 12, the pair of first cutting lines 31 may be formed on the top wall 10 to which the passage piece 14 is adhered. Specifically, a pair of first cutting lines 31 are directed toward the first side wall 11 side from the vicinity of the notch portion 20 (in the direction opposite to the bonding position of the joint piece 14) and the second ruled line L2 (step direction). ) May extend substantially parallel to (4th modification). In this case, a cutting line such as a zipper may be formed along the boundary between the top wall 10 and the first side wall 11 (first ruled line L1). Even in this case, it is preferable that the strip-shaped top wall 10 cut along the pair of first cutting lines 31 is connected to the upper end portion of the first side wall 11. Further, in this case, the first auxiliary ruled line L11, the second auxiliary ruled line L12, the second cutting line 32, the third cutting line 33, and the like may be omitted. Further, in this case, only one first cutting line 31 may be formed. In addition, as shown in FIG. 13, the pair of first cutting lines 31 may be formed on the pair of first outer flaps 17 (fifth modification). The first cutting line 31 was formed over the entire width direction of the top wall 10 (first outer flap 17), but is not limited to this, and at least the joint piece 14 side (up to the middle of the width direction). It suffices if it is formed in.

Further, in the packaging box 1 according to the present embodiment, the second cutting line 32 is formed on the first outer flap 17, and the third cutting line 33 is formed on the second outer flap 18, but the present invention is not limited to this. The second cutting line 32 and the third cutting line 33 may be omitted. Further, the first to third cutting lines 31 to 33 are so-called zippers, but the present invention is not limited to this, and any cutting line for cutting a corrugated cardboard sheet such as a sewing machine wire may be used.

Further, in the packaging box 1 according to the present embodiment, a pair of first auxiliary ruled lines L11 extend diagonally from the vicinity of the notch portion 20 in a direction opposite to the bonding position of the joint piece 14, but this is the present invention. Not limited to. For example, as shown in FIG. 14, the pair of first auxiliary ruled lines L21 extend substantially parallel to the first cutting line 31 (second ruled line L2) from the vicinity of the notch portion 20 toward the first side wall 11 side. It may be (sixth modification). Both ends of the first auxiliary ruled line L21 are separated inward from both ends in the step direction of the top wall 10.

Further, in the packaging box 1 according to the present embodiment, the pair of second auxiliary ruled lines L12 are each formed by one reverse ruled line, but the present invention is not limited to this. For example, as shown in FIG. 15, the pair of second auxiliary ruled lines L12 may be composed of two reverse ruled lines arranged in parallel at narrow intervals (seventh modification). Further, it may be combined with the above-mentioned first auxiliary ruled line L21. Further, the second auxiliary ruled line L12 may be a general-purpose ruled line.

Further, in the packaging box 1 according to the present embodiment, the first auxiliary ruled line L11 (L21) and the second auxiliary ruled line L12 are provided on the top wall 10, but the present invention is not limited to this, and the first auxiliary ruled line L11 (L11) L21) or the second auxiliary ruled line L12 may be omitted.

Further, in the packaging box 1 according to the present embodiment, the notch portion 20 is formed in the top wall 10, but the notch portion 20 may be omitted. Further, although the first auxiliary ruled lines L11 and L21 and the second auxiliary ruled lines L12 are formed on the top wall 10, these auxiliary ruled lines L11, L12 and L21 may be omitted.

Further, the packaging box 1 according to the present embodiment is a wraparound case, but the present invention is not limited thereto. For example, as shown in FIG. 16, the opening folding line 21, the peeling auxiliary folding line 23, the step crushing portion 25, and the like may be applied to the A-type packaging box 2 (eighth modification). Specifically, in the packaging box 2, a pair of side walls 40 and a pair of end walls 41 are alternately connected to form a substantially square tubular peripheral wall 2A, and the upper and lower surfaces of the peripheral wall 2A are closed and sealed. Will be done. A pair of outer flaps 42 are provided on the upper and lower ends of the side wall 40, and a pair of inner flaps 43 are provided on the upper and lower ends of the end wall 41. The pair of outer flaps 42 (first wall) are superposed on the inner flap 43 (third wall) and adhered via an adhesive. The pair of opening folding lines 21 and the peeling auxiliary folding line 23 (or the step crushing portion 25) are formed substantially in the center in the width direction. The pair of opening folding lines 21 (opening surface 22) is formed by one end wall 41 (second wall) and an inner flap 43 (third wall) connected to the upper end portion (or lower end portion) of the end wall 41. It is formed near the corners that form. The peeling auxiliary folding line 23 (or the step crushed portion 25) is formed on the end wall 41 (or / and the inner flap 43) on the outside of the opening surface 22. The pair of side walls 40 (fourth wall) are provided so as to be connected to the outer flap 42 in a posture capable of intersecting the outer flap 42 (first wall) and the end wall 41 (second wall). The pair of first cutting lines 31 (cutting lines) are formed along the boundary between the pair of outer flaps 42 and the pair of side walls 40. The first cutting line 31 separates the outer flap 42 peeled off from the inner flap 43 from the side wall 40. According to the packaging box 2 according to the eighth modification, the same actions and effects as those of the invention according to the above-described embodiment can be obtained.

Although not shown, the pair of first cutting lines 31 may be formed on the pair of outer flaps 42 or the pair of side walls 40. Further, the pair of opening folding lines 21 and the peeling auxiliary folding line 23 (or the step crushing portion 25) may be formed at positions deviated from substantially the center in the width direction. In this case, the pair of first cutting lines 31 may be formed on one outer flap 42, or only one first cutting line 31 may be formed. Further, the pair of first cutting lines 31 may be omitted. The first cutting line 31 was formed over the entire length direction of the outer flap 42 (side wall 40), but is not limited to this, and is formed at least on the inner flap 43 side (up to the middle in the length direction). It suffices if it is done. Further, although not shown, at least one of the first auxiliary ruled line L11 (L21) and the second auxiliary ruled line L12 may be formed on the pair of outer flaps 42.

Further, as another example, although not shown, in a wraparound case in which the opening folding line 21, the peeling auxiliary folding line 23, the step crushing portion 25, etc. are full over flap type, the outer flap adhered to the inner flap is peeled off. It may be applied as a structure. That is, the opening folding line 21, the peeling auxiliary folding line 23, the step crushing portion 25, and the like can be applied to various types of packaging boxes for adhering the third wall to the first wall.

Further, the packaging boxes 1 and 2 according to the present embodiment are formed of a double-sided corrugated cardboard sheet made of paper, but the present invention is not limited thereto. For example, the corrugated cardboard sheet may be a single-sided corrugated cardboard sheet in which a liner is attached to one side of the inner shin 9A, or a double-sided corrugated cardboard sheet in which a single-sided corrugated cardboard sheet is attached to a double-sided corrugated cardboard sheet. Further, for example, the packaging box 1 may be formed of thick paper, a resin plate, or the like instead of the corrugated cardboard sheet made of paper.

The description of the 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.

1, 2, Packaging Box 1A, 2A Circumferential Wall 9A Middle Shin 9B Front Liner 9C Back Liner 10 Top Wall (1st Wall)
11 1st side wall (2nd wall)
12 Bottom wall (1st wall)
13 Second side wall (second wall)
14 Substitute piece (3rd wall)
15 1st inner flap (inner flap)
16 Second inner flap (inner flap)
17 First outer flap (outer flap)
18 Second outer flap (outer flap)
20 Notch 21 Opening folding line 21A Straight part 21B Inclined line part 22 Opening surface 22A Crossing line part 23 Peeling auxiliary folding line (Peeling auxiliary part)
24 Peeling auxiliary area 25 Step crushing part (Peeling auxiliary part)
31 First cutting line (cutting line)
40 side wall (fourth wall)
41 End wall (second wall)
42 Outer flap (1st wall)
43 Inner flap (3rd wall)
L1 1st ruled line (folded curve)
L11, L21 1st auxiliary ruled line L12 2nd auxiliary ruled line

Claims (8)

The first wall (10, 42) and
The second wall (13, 41) provided in a posture capable of intersecting the first wall, and
The third wall (14,43), which is provided at the end of the second wall in a state of being connected to the end of the second wall via a folding curve (L1) and adhered to the inner surface of the first wall,
A pair of opening folding lines formed on the second wall and the third wall along the folding curve and forming a chamfered opening surface (22) at a corner formed by the second wall and the third wall. (21) and
The opening is formed on at least one of the second wall and the third wall on the outside of the opening surface, and when the opening surface is pushed inward, the third wall is peeled off from the first wall. A packaging box (1, 2) comprising: a peeling assisting portion (23, 25) for partitioning a peeling assisting region (24) pushed together with a surface. The peeling auxiliary portion is formed so as to surround the opening folding line, and is a peeling auxiliary folding line (23) for causing a mountain fold of at least one of the second wall and the third wall. Item 1. The packaging box according to item 1. The second wall and the third wall are made of corrugated cardboard sheets.
The first aspect of the present invention is that the peeling assisting portion is a step crushing portion (25) in which the corrugated cardboard sheet is compressed from both sides in the peeling assisting region surrounding the opening folding line to crush the inner lining (9A). The listed packaging box. The packaging box according to any one of claims 1 to 3, wherein the first wall is formed with a notch (20) that faces the opening surface and exposes the opening surface. The pair of the first walls (10, 12) arranged to face each other and the pair of the second walls (11, 13) arranged to face each other at positions adjacent to the pair of first walls A tubular peripheral wall having both ends opened is formed in a state where the third wall connected to the second wall is adhered to the first wall.
A pair of inner flaps (15, 16) are connected to both ends of the second wall.
A pair of outer flaps (17, 18) that close the openings at both ends of the peripheral wall while being adhered to the inner flaps are connected to both ends of the first wall.
Wherein the third wall is adhered first wall, or in its said first wall and the boundary between the pair of outer flaps or the pair of outer flaps, a pair of cutting lines (31) are formed,
When the pair of cutting lines are formed on the first wall or the boundary, the pair of cutting lines separates the first wall peeled from the third wall from the pair of outer flaps.
The packaging box according to any one of claims 1 to 4 , wherein when the pair of cutting lines are formed on the pair of outer flaps, the pair of cutting lines divides the pair of outer flaps. 1). Further, a fourth wall (40) provided in a state of being connected to the first wall in a posture capable of intersecting the first wall (42) and the second wall (41) is further provided.
Said first wall, or the boundary between the first wall and the fourth wall or to the fourth wall, the switching disconnection (31) is formed,
When the cutting line is formed on the first wall or the boundary, the cutting line separates the first wall peeled from the third wall (43) from the fourth wall.
The packaging box (2) according to any one of claims 1 to 4 , wherein when the cutting line is formed on the fourth wall, the cutting line divides the fourth wall. A pair of first auxiliary ruled lines (L11, L21) extending from the vicinity of the opening surface in the direction opposite to the bonding position of the third wall are formed on the first wall.
The packaging box according to claim 5 or 6, wherein the first wall is peeled off from the third wall and cut along the cutting line while making a mountain fold along the pair of first auxiliary ruled lines. .. A pair of second auxiliary ruled lines (L12) on the first wall extend in a direction opposite to the bonding position of the third wall while being inclined in a direction approaching each other from both outer sides at a position separated from the third wall. Is formed,
The first wall is according to any one of claims 5 to 7, wherein the first wall is peeled off from the third wall and cut along the cutting line while making a valley fold along the pair of second auxiliary ruled lines. Packaging box.

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