JP7175716B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes.

Patent Literature 1 discloses an easy-to-open packaging box that can be easily opened to display merchandise. The front wall of the easy-open packaging box has a front cutting line between the ridges of both side walls, and the side walls have a side cutting line extending rearward and upward following the front cutting line. The front cutting line and the side cutting line are formed by arranging a plurality of cuts (all cutting lines) passing through the cardboard sheet at predetermined intervals. When opening the easy-open packaging box, the upper part of the easy-open packaging box is removed after the front wall and side walls are cut along the front cutting line and the side cutting line.

JP 2016-107993 A

However, in the easy-to-open packaging box described above, the front cut line and the side cut line are composed of a plurality of all cut lines and extend in the lateral direction, so there is a risk that the strength of the front wall and the side walls will decrease.

In order to solve the above problems, the present invention provides a packaging box that can be easily opened while suppressing deterioration in strength.

In order to achieve the above object, the present invention provides a packaging box formed from a corrugated cardboard sheet with a liner attached to the inside, comprising a first wall and both ends of the first wall in the first direction. a pair of second walls provided; a pair of flaps connected to one end of the pair of second walls in a second direction intersecting the first direction; the first wall and the pair of second walls; a first breaking line extending along the first direction across the pair of walls and the pair of flaps across the pair of second walls and the pair of flaps on the flap side of the first breaking line; a pair of second break lines extending along two directions, wherein the first break lines are liner cuts that cut the liner inside the first wall and the pair of second walls. and the pair of second breaking lines are breaking lines in which a plurality of cuts passing through the corrugated cardboard sheet in the thickness direction are arranged at predetermined intervals.

In this case, the first wall and the pair of second walls are provided with a pair of first breaking lines spaced apart in parallel in the second direction so as to form band-shaped breaking bands. At least one of the second walls of the is formed with a grip portion for gripping by dividing the fracture band by a grip fracture line that penetrates the corrugated cardboard sheet in the thickness direction, and a part of the grip fracture line is formed by the It is preferably connected to the terminal portion of the second breaking line.

In this case, the pair of second breaking lines preferably breaks the flap and the second wall in a direction from the flap toward the second wall.

In this case, an inner flap connected to one end of the first wall in the second direction is further provided, the flap is superimposed on the outer side of the inner flap, and the user puts his or her hand into the flap to start unsealing. It is preferable that an opening start breaking line for opening a hole is formed by bending a part of the second breaking line.

In another case, an outer flap connected to one end in the second direction of the first wall is further provided, the outer flap is overlapped on the outer side of the flap, and the free end side of the outer flap is provided for the user. It is preferable that an unsealing start breaking line is formed for opening an unsealing start hole into which a person inserts his or her hand.

In other cases, it is preferred that said pair of second break lines break said second wall and said flap in a direction from said second wall towards said flap.

ADVANTAGE OF THE INVENTION According to this invention, a packaging box can be opened easily, suppressing the strength reduction of a packaging box.

It is a perspective view showing a packaging box concerning a 1st embodiment of the present invention. 1 is a plan view showing a blank of a packaging box according to a first embodiment of the present invention; FIG. FIG. 4 is a perspective view illustrating a process of forming a front opening in the packaging box according to the first embodiment of the present invention; FIG. 3 is a perspective view showing a state in which a front opening is formed in the packaging box according to the first embodiment of the present invention; FIG. 2 is a perspective view showing a state in which a full opening is formed in the packaging box according to the first embodiment of the present invention; FIG. 11 is a plan view showing a blank of the packaging box according to the first modified example of the first embodiment of the present invention; FIG. 11 is a plan view showing a blank of a packaging box according to a second modified example of the first embodiment of the present invention; It is a perspective view showing a packaging box concerning a 2nd embodiment of the present invention. FIG. 5 is a plan view showing a blank of a packaging box according to a second embodiment of the present invention; FIG. 10 is a perspective view illustrating a process of forming a front opening in the packaging box according to the second embodiment of the present invention; FIG. 8 is a perspective view showing a state in which a front opening is formed in the packaging box according to the second embodiment of the present invention; It is a perspective view which shows the packaging box which concerns on 3rd Embodiment of this invention. FIG. 11 is a plan view showing a blank of a packaging box according to a fourth embodiment of the present invention;

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates " "Upper" and "D" indicate "Lower". The front-rear direction is perpendicular to (crosses) the left-right direction, and the up-down direction (second direction) is perpendicular to the front-rear direction and the left-right direction. Terms indicating direction and position are used in this specification, but these terms are used for convenience of description and are not intended to limit the technical scope of the present invention.

[First Embodiment: Outline of Packaging Box]
The configuration of the packaging box 1 will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing a packaging box 1. FIG. FIG. 2 is a plan view showing the blank 5 of the packaging box 1. FIG.

As shown in FIG. 1, the packaging box 1 is formed in a substantially rectangular parallelepiped shape. The packaging box 1 is an A-type box that is sealed by closing the upper end surface and the lower end surface of a substantially rectangular tubular peripheral wall 1W. A plurality of articles (not shown) are accommodated inside the packaging box 1 .

The packaging box 1 is formed by assembling blanks 5 shown in FIG. The packaging box 1 (blank 5) is formed of, for example, a double-faced cardboard sheet made of paper in which a front liner 9B and a back liner 9C (see FIG. 3) are pasted on the front and back of a corrugated medium 9A. The blank 5 is formed, for example, by punching out a cardboard sheet with a die or the like. Note that FIG. 2 shows the front liner 9B side (the outer surface side of the packaging box 1). In this specification, the direction parallel to the corrugated board 9A is referred to as the "corrugation direction (second direction)", and the direction orthogonal to the corrugation direction (corrugation 9A) is referred to as the "flow direction (first direction)". It is assumed that The "X" shown in the drawings indicates the "row direction", and the "Y" indicates the "flow direction". In this specification, the terms "upper (top)", "lower (bottom)" and similar terms refer to the upper (top), lower (bottom) and upper (bottom) of the packaging box 1 in an assembled state (assembled state). refers to concepts similar to

[blank]
As shown in FIG. 2, the blank 5 includes a pair of end walls 10 (first wall), a pair of side walls 11 (second wall), a passage piece 12, and a pair of upper inner flaps 13 (inner flaps). , a pair of upper and outer flaps 14 (flaps), a pair of lower inner flaps 15, and a pair of lower outer flaps 16.

<End wall, side wall>
The pair of end walls 10 and the pair of side walls 11 are alternately connected via first folding lines L1. The end wall 10 is formed in a substantially rectangular shape narrower in the flow direction than the side wall 11 . The passage piece 12 is connected to the end portion of the side wall 11 in the flow direction via the first folding line L1. A hand cutting line 17 for opening a hand hole (not shown) is formed on one side (upper side) of the end wall 10 in the step direction. A user can cut the end wall 10 along the cutting line 17 for handling to form a handling hole, and carry the packaging box 1 by placing a hand in the handling hole.

<Upper inner flap, upper outer flap>
The pair of upper inner flaps 13 are connected to one end (upper end) in the step direction of the pair of end walls 10 via a second folding line L2. The upper inner flap 13 is formed in a substantially rectangular shape having substantially the same width as the dimension of the end wall 10 in the flow direction. The stepwise dimension (extending dimension) of the upper inner flap 13 is set to be approximately half the dimension of the end wall 10 in the flow direction. The pair of upper and outer flaps 14 are connected to one end (upper end) in the step direction of the pair of side walls 11 via a second folding line L2. The upper and outer flaps 14 are formed in a substantially rectangular shape having substantially the same width as the dimension of the side wall 11 in the flow direction. The dimension (extension dimension) of the upper and outer flaps 14 in the stage direction is substantially the same as the extension dimension of the upper inner flap 13 .

<Lower inner flap, lower outer flap>
The pair of lower inner flaps 15 are connected to the other end (lower end) in the step direction of the pair of end walls 10 via a third folding line L3. The pair of lower outer flaps 16 are connected to the other end (lower end) in the step direction of the pair of side walls 11 via a third folding line L3. The lower inner flap 15 is formed in substantially the same shape as the upper inner flap 13 , and the lower outer flap 16 is formed in substantially the same shape as the upper outer flap 14 .

Note that the first to third folding lines L1 to L3 are general-purpose ruled lines formed by flattening the corrugated cardboard sheet straight in the thickness direction from the back liner 9C side. The general-purpose ruled lines have the function of folding the corrugated cardboard sheet so that the back liner 9C faces inward. The above-described first to third folding lines L1 to L3 are not limited to general-purpose ruled lines, and may be any lines for folding corrugated cardboard sheets, such as lead ruled lines in which a plurality of cuts are formed on a general-purpose ruled line at predetermined intervals. good.

[Opening structure]
As shown in FIG. 2, the blank 5 is formed with an opening structure 20 for opening the sealed packaging box 1 . The opening structure 20 includes a pair of first breaking lines 21 and a pair of second breaking lines 22 . The pair of first breaking lines 21 extends along the flow direction (first direction) across the pair of end walls 10 and the pair of side walls 11 (and the passage piece 12). The pair of second breaking lines 22 extend along the step direction (second direction) across the pair of side walls 11 and the pair of upper and outer flaps 14 on the side (upper side) of the upper and outer flaps 14 relative to the first breaking line 21 . has been extended.

<First breaking line>
The pair of first breaking lines 21 are formed below the center of the end wall 10, the side wall 11 and the passage piece 12 in the step direction. The pair of first breaking lines 21 are formed substantially parallel with a gap in the step direction (vertical direction) so as to form a band-shaped breaking band 23 . That is, the pair of first breaking lines 21 extends substantially horizontally over the entire circumference of the peripheral wall 1W in the assembled state of the packaging box 1 (see FIG. 1, etc.). A first breaking line 21 is a liner cut obtained by cutting the pair of end walls 10 , the pair of side walls 11 and the inner back liner 9</b>C of the passage piece 12 . The pair of first breaking lines 21 have the function of separating the breaking band 23 from the end wall 10 , side wall 11 and passage piece 12 . Note that "the first breaking line 21 is a liner cut that cuts the back liner 9C" does not strictly mean that only the back liner 9C of the corrugated cardboard sheet should be cut. This also means that the back side of the is also slightly cut. In other words, the "first breaking line 21 (liner cut)" includes not only the back liner 9C but also the corrugated cardboard sheet cut to about half the thickness from the back liner 9C side.

Each side wall 11 is formed with a pair of gripping portions 24A for gripping the breaking band 23 by gripping breaking lines 24 (full cutting lines) penetrating the corrugated cardboard sheet in the thickness direction. The knob portion 24A is formed at a position closer to the end wall 10 sandwiched between the pair of side walls 11 than the center of the side wall 11 in the flow direction. The pinch breaking line 24 consists of one cutting line extending in the row direction across the breaking band 23 and four cutting lines extending substantially parallel to the first breaking line 21 outside the first breaking line 21 in the row direction. and is formed in a substantially H shape.

<Second breaking line>
The pair of second breaking lines 22 is formed at a position closer to the end wall 10 sandwiched between the pair of side walls 11 than the center of the side wall 11 in the flow direction. The pair of second breaking lines 22 extends from the first breaking line 21 on the upper side to the tip of the upper outer flap 14 . The pair of second breaking lines 22 are zippers (breaking lines) in which a plurality of substantially L-shaped cuts passing through the cardboard sheet in the thickness direction are arranged at predetermined intervals. The pair of second breaking lines 22 are formed symmetrically across the end wall 10 . The plurality of cuts forming the pair of second breaking lines 22 are mainly in the form of hooks bent in a direction in which one of the step directions approaches each other. The pair of second breaking lines 22 has the function of breaking the upper/outer flap 14 and the side wall 11 in the direction from the upper/outer flap 14 toward the side wall 11 .

Specifically, the second breaking line 22 includes a second side breaking line 22A formed in the side wall 11 and a second top surface breaking line 22B formed in the upper and outer flaps 14 .

(Second side breaking line)
The second side breaking line 22A is formed between the first breaking line 21 (knob portion 24A) and the second folding line L2. The pair of second side breaking lines 22A incline from near the upper end of the entire cutting line between the pair of knob portions 24A toward the second folding line L2 so as to separate from each other.

Further, a part (entire cutting line) of the knob breaking line 24 described above is connected to the terminal portion 22E of the second side breaking line 22A (second breaking line 22). Specifically, among the plurality of cutting lines forming the pinch breaking line 24, the upper cutting line extending substantially parallel to the first breaking line 21 on the side of the end wall 10 sandwiched between the pair of side walls 11 is the first cutting line. It is connected to the terminal portion 22E of the two-side breaking line 22A. More specifically, the end portion 22E of the second side breaking line 22A located on the side of the first breaking line 21 bends toward the side of the end wall 10 sandwiched between the pair of side walls 11 and extends along the pinch breaking line 24 described above. It is continuous with all cutting lines.

(Second top surface breaking line)
The second top surface breaking line 22B extends substantially parallel to (steps of) the middle core 9A. Further, an opening start breaking line 25 for opening an opening start hole 25A (see FIG. 3) into which the user inserts his or her hand is formed on the tip side (free end side) of the upper and outer flaps 14 . The opening start breaking line 25 is formed by bending a part of the second top surface breaking line 22B (second breaking line 22). Specifically, the pair of opening start breaking lines 25 are bent in directions away from each other from the pair of second top surface breaking lines 22B, and then the free end side so as to be substantially parallel to the pair of second top surface breaking lines 22B. curved towards. An opening start folding line 25B (general-purpose ruled line) is formed on the upper and outer flaps 14 on an extension line of the second top surface breaking line 22B.

[Sealing the packaging box]
Next, a sealing procedure (assembling procedure) of the packaging box 1 will be described with reference to FIG. The packaging box 1 may be assembled manually by an operator, or may be assembled automatically or semi-automatically by a box making machine. Here, as an example, a case where an operator assembles the packaging box 1 will be described. It is assumed that the end wall 10 and the side wall 11 are folded along the first folding line L1 near the center of the blank 5 in the flow direction, and the packaging box 1 is in a folded state. Also, the passage piece 12 is assumed to be adhered to the inner surface of the end wall 10 with an adhesive.

First, an operator bends the pair of end walls 10 and the pair of side walls 11 at a substantially right angle along the first folding lines L1 to form a substantially square tube-shaped peripheral wall 1W. In this state, the pair of end walls 10 are arranged facing each other in the front-rear direction, and the pair of side walls 11 are connected to both end portions in the front-rear direction (flow direction) of each end wall 10 .

Next, the operator folds the pair of lower inner flaps 15 toward the inner side of the peripheral wall 1W along the third folding lines L3, and then folds the pair of lower outer flaps 16 toward the inner side of the peripheral wall 1W along the third folding lines L3. The lower outer flap 16 is adhered to the surface of the lower inner flap 15 with an adhesive such as hot melt. In this state, the pair of lower inner flaps 15 are extended from the lower ends of the pair of end walls 10 so as to approach each other, and the tips of the pair of lower inner flaps 15 are separated. The pair of lower outer flaps 16 are extended from the lower end portions of the pair of side walls 11 so as to approach each other, and overlapped with the pair of lower inner flaps 15 with their tips facing each other.

As described above, the opening of the lower surface of the peripheral wall 1W is closed, and the bottom surface of the packaging box 1 is formed. A worker puts a plurality of articles (not shown) inside (on the bottom surface) from the top opening of the peripheral wall 1W.

Next, the operator folds the pair of upper inner flaps 13 toward the inner side of the peripheral wall 1W along the second folding lines L2, and then folds the pair of upper outer flaps 14 toward the inner side of the peripheral wall 1W along the second folding lines L2. The upper outer flap 14 is adhered to the surface of the upper inner flap 13 with an adhesive such as hot melt. In this state, the pair of upper inner flaps 13 are extended from the upper ends of the pair of end walls 10 so as to approach each other, and the tips of the pair of upper inner flaps 13 are separated. In addition, the leading end of the front upper inner flap 13 is located at a position substantially coinciding with the second top surface breaking line 22B or on the front side of the second top surface breaking line 22B. The upper inner flap 13 extends to a position not exceeding the second top surface breaking line 22B so as not to interfere with the formation of the opening start hole 25A. The pair of upper and outer flaps 14 are extended from the upper end portions of the pair of side walls 11 so as to approach each other, and overlap the pair of upper and inner flaps 13 with their tips facing each other.

As described above, the upper surface opening of the peripheral wall 1W is closed, and the top surface of the packaging box 1 is formed. That is, the packaging box 1 is in a sealed state (see FIG. 1). Although the upper and lower outer flaps 14 and 16 are adhered to the inner flaps 13 and 15 via an adhesive, the present invention is not limited to this, and an adhesive tape is applied along the butted portions of the outer flaps 14 and 16. may be attached (not shown).

[Opening the packaging box]
Next, a procedure for opening the packaging box 1 will be described with reference to FIGS. 3 to 5. FIG. FIG. 3 is a perspective view illustrating the process of forming the front opening M1 in the packaging box 1. FIG. FIG. 4 is a perspective view showing a state in which a front opening M1 is formed in the packaging box 1. FIG. FIG. 5 is a perspective view showing a state in which the packaging box 1 is formed with an opening M2.

The packaging box 1 can be opened in two ways using the opening structure 20 . Specifically, the opening structure 20 can remove the front upper portion of the packaging box 1 to form a front opening M1, or remove the entire upper portion of the packaging box 1 to form a front opening M2. .

<When forming the front opening>
First, the case of forming the front opening M1 in the packaging box 1 will be described. The user pushes down the portion (see FIG. 1) surrounded by the pair of tear-start tear lines 25 to cut the pair of upper and outer flaps 14 along the pair of tear-start tear lines 25 . 25 A of opening start holes are formed by bending|folding inside the packaging box 1 along the opening start folding line 25B, cutting the part enclosed by the opening start breaking line 25 (refer FIG. 3).

The user puts his or her hand (fingers) into the opening start hole 25A, grabs the pair of upper and inner flaps 14 and 13, and pulls them forward (pulls down). Then, the pair of upper and outer flaps 14 are cut from the opening start hole 25A toward both outer sides along the pair of second top surface breaking lines 22B. After that, the pair of side walls 11 are cut along the pair of second side breaking lines 22A from above downward. Further, the side wall 11 is cut from the terminal portion 22E of the second side surface breaking line 22A along a portion (upper front side) of the pinch breaking line 24, and then extends upward from a portion of the pinch breaking line 24 toward the front. It is cut along the first breaking line 21 . As shown in FIG. 3, the front portion of the upper and outer flaps 14, the upper front portion of the side wall 11, and the upper portion of the end wall 10 tilt forward with the upper first break line 21 formed in the end wall 10 as a fulcrum. be able to.

As shown in FIG. 4 , the user cuts the end wall 10 along the upper first break line 21 to remove the upper outer flap 14 , the side walls 11 and part of the end wall 10 . As a result, a front opening M1 is formed in a range surrounded by (the front side of) the first breaking line 21 and the pair of second breaking lines 22 (the front upper portion of the packaging box 1). A part of the articles housed in the packaging box 1 is exposed from the front opening M1, and the user or the like can take out the articles from the front opening M1. The article is displayed in a shop or the like while being housed in the packaging box 1 with the front opening M1 opened.

<When forming a full-surface opening>
Next, the case of forming the opening M2 on the entire surface of the packaging box 1 will be described. For example, the user pushes in (or pulls out) the knob 24A (see FIGS. 1 and 4) formed on the side wall 11, grabs the knob 24A, and pulls it horizontally. Then, the breaking band 23 is cut along the pair of upper and lower first breaking lines 21 . Since the rupture band 23 is formed over the entire circumference of the peripheral wall 1W, the packaging box 1 (peripheral wall 1W) is divided into upper and lower halves by removing the rupture band 23 from the peripheral wall 1W.

As shown in FIG. 5, the upper part of the divided packaging box 1 is removed to form a full opening M2. The article is stored in the lower part of the remaining packaging box 1. The upper part of the article is exposed from the front opening M2, and the user or the like can take out the article from the front opening M2. In addition, the article may be exhibited at a store or the like in a state of being housed in the packaging box 1 with the full opening M2 opened. Further, a full opening M2 may be formed in the sealed packaging box 1, or a full opening M2 may be formed in the packaging box 1 after the front opening M1 is opened.

In the packaging box 1 according to the first embodiment described above, the first breaking line 21 is formed along the entire circumference of the peripheral wall 1W formed by the end wall 10 and the side wall 11 in a substantially square tubular shape. A line 21 was constructed with a liner cut. According to this configuration, since the first breaking line 21 (liner cut) does not pass through the walls 10 and 11 in the thickness direction, when a cut that passes through the walls 10 and 11 in the thickness direction is formed, In comparison, the strength (compressive strength, bending strength, etc.) of the walls 10 and 11 can be maintained high. Also, the end wall 10 , the side wall 11 and the upper and outer flaps 14 are configured to be broken (cut) along the first breaking line 21 and the second breaking line 22 . According to this configuration, the walls 10, 11 and the upper and outer flaps 14 are cut along the first and second breaking lines 21, 22, so that the wall is surrounded by the first breaking line 21 and the second breaking line 22. The covered area (part of the packaging box 1) can be easily removed. In addition, by cutting the walls 10 and 11 (peripheral wall 1W) along the first breaking line 21, the entire upper portion of the packaging box 1 can be easily removed. In this way, the user can freely select an unsealing form from the form in which the front upper part of the packaging box 1 is removed and the form in which the entire upper part of the packaging box 1 is removed. As described above, it is possible to easily open the packaging box 1 while suppressing a decrease in the strength of the packaging box 1 . Furthermore, the opening range of the packaging box 1 can be changed according to the usage situation (user's desire).

In addition, in the packaging box 1 according to the first embodiment, the end portion 22E of the second breaking line 22 is configured to be continuous with a portion (entire cutting line) of the knob breaking line 24 forming the knob portion 24A. In other words, a part of the pinch breaking line 24 is configured to be used as a part of the terminal portion 22E of the second breaking line 22 as well. According to this configuration, the boundary portion between the first breaking line 21 and the second breaking line 22 can be cut smoothly. Thereby, the range surrounded by the first and second breaking lines 21 and 22 can be easily removed. Alternatively, the user can firmly grasp the tab 24A to break the tear band 23 from each wall 10,11. Thereby, the packaging box 1 can be easily divided into upper and lower parts.

Further, according to the packaging box 1 according to the first embodiment, the user can cut from the side wall 11 to the end wall 10 by simply grasping and pulling down the cut upper and outer flaps 14 . Thereby, the area surrounded by the first and second breaking lines 21 and 22 can be easily removed.

In addition, according to the packaging box 1 according to the first embodiment, the user cuts the upper and outer flaps 14 along the unsealing start breaking line 25 to form the unsealing start hole 25A, and inserts his or her hand into the unsealing start hole 25A. The upper and outer flaps 14 can be pulled outward (upper oblique front side). Thereby, the upper and outer flaps 14 can be easily cut along the second breaking line 22 .

In addition, in the packaging box 1 according to the first embodiment, the second breaking line 22 is formed across the side wall 11 and the upper and outer flaps 14, but the present invention is not limited to this. For example, as shown in FIG. 6, in the packaging box 1 (blank 5) according to the first modified example, the pair of second breaking lines 22 extends across the pair of end walls 10 and the pair of upper inner flaps 13 in the step direction. is extended along the In this case, the pair of end walls 10 serve as second walls that are connected to both end portions in the flow direction (first direction) of side walls 11 (first walls). Also, in this case, the opening start breaking line 25 is omitted, and the second top surface breaking line 22B extends to the tip of the upper inner flap 13 . An opening start breaking line 26 and an opening start folding line 26B for opening an opening start hole 26A for a user to put his or her hand in are formed on the free end side of the upper outer flap 14 sandwiched between the pair of upper inner flaps 13. . Also, in this case, the handle hole (hand cutting line 17) is omitted from the end wall 10. As shown in FIG. According to the packaging box 1 according to the first modification of the first embodiment described above, it is possible to easily open the packaging box 1 while suppressing a decrease in the strength of the packaging box 1. The same functions and effects as those of the packaging box 1 according to the form can be obtained.

In addition, in the packaging box 1 according to the first embodiment (including the first modified example), the terminal portion 22E of the second breaking line 22 is continuous with a part (entire cutting line) of the pinch breaking line 24, The invention is not limited to this. As shown in FIG. 7 , the end portion 22E of the second break line 22 may be separated from the pinch break line 24 . For example, if the second breaking line 22 is formed on the side wall 11 , the knob portion 24A (the knob breaking line 24 ) may be formed on the end wall 10 .

[Second embodiment]
Next, the configuration of the packaging box 2 according to the second embodiment will be described with reference to FIGS. 8 and 9. FIG. FIG. 8 is a perspective view showing the packaging box 2. FIG. 9 is a plan view showing the blank 6 of the packaging box 2. FIG. In addition, in the following description, the same code|symbol is attached|subjected to the same or corresponding structure as the packaging box 1 which concerns on 1st Embodiment (a 1st and 2nd modification is included.), and those description is abbreviate|omitted.

In the second embodiment, an opening structure 30 for opening the packaging box 2 is different from the opening structure 20 of the packaging box 1 according to the first embodiment.

[Opening structure]
The opening structure 30 includes a pair of first breaking lines 21 and a pair of second breaking lines 32 . A pair of first breaking lines 21 are formed along the entire circumference of the peripheral wall 2W, and a pair of second breaking lines 32 are formed on the pair of side walls 11 and the upper and outer flaps 14 . A pair of knob portions 24A (knob breaking lines 24) for gripping by the user are formed near the center of the end wall 10 in the flow direction.

<Second breaking line>
A pair of second breaking lines 32 are zippers formed symmetrically across the end wall 10 . The plurality of cuts that form the pair of second breaking lines 32 are mainly in the form of hooks that are bent in a direction in which the other (lower) side of the step direction is brought closer to each other. The pair of second breaking lines 32 has the function of breaking the side wall 11 and the upper and outer flaps 14 in the direction from the side wall 11 toward the upper and outer flaps 14 .

Specifically, the second breaking line 32 includes a second side breaking line 32A formed in the side wall 11 and a second top surface breaking line 32B formed in the upper and outer flaps 14 . The pair of second side fracture lines 32A are inclined away from each other from the upper first fracture line 21 toward the second folding line L2. A terminal portion 32E of the second side breaking line 32A (the second breaking line 32) is located slightly above the first breaking line 21 on the upper side. The second top surface breaking line 32B extends from the base end to the tip end of the upper and outer flaps 14 substantially parallel to (steps of) the middle core 9A. It should be noted that the breaking line 25 (opening start hole 25A) is omitted.

The packaging box 2 is assembled from the blanks 6 described above. Since the assembly procedure (sealing procedure) of the packaging box 2 is the same as the assembly procedure of the packaging box 1 according to the first embodiment, the description thereof will be omitted.

[Opening the packaging box]
Next, a procedure for opening the packaging box 2 will be described with reference to FIGS. 10 and 11. FIG. FIG. 10 is a perspective view illustrating the process of forming the front opening M1 in the packaging box 2. FIG. FIG. 11 is a perspective view showing a state in which a front opening M1 is formed in the packaging box 2. FIG.

<When forming the front opening>
A user presses (or pulls out) a knob 24A (see FIG. 8) formed on the front end wall 10 to form an opening, and puts a hand (fingers) on the upper edge of the opening to open the end wall 10. to the front (pull up). Then, the end wall 10 is cut along the upper first breaking line 21 toward both outer sides from the knob portion 24A. After that, the pair of side walls 11 are cut along the upper first breaking line 21 from the boundary line with the end wall 10 toward the terminal portion 32E of the second side breaking line 32A, and then from below to above. It is cut along a pair of second side breaking lines 32A. As shown in FIG. 10, a part of the cut end wall 10 and side wall 11 can be tilted rearward with the second top surface breaking line 32B formed in the upper and outer flaps 14 as a fulcrum.

As shown in FIG. 11, the user cuts the pair of upper and outer flaps 14 along the second top surface breaking line 32B to remove the end wall 10, the side wall 11 and part of the upper and outer flaps 14. As shown in FIG. As a result, a front opening M1 is formed in a range surrounded by (the front side of) the first breaking line 21 and the pair of second breaking lines 32 (the front upper portion of the packaging box 2).

The procedure for forming the opening M2 on the entire surface of the packaging box 2 is the same as the corresponding procedure for the packaging box 1 according to the first embodiment, so description thereof will be omitted. Further, since the shape of the packaging box 2 having a front opening M2 is the same as that of the packaging box 1 according to the first embodiment shown in FIG. 5, illustration thereof is omitted.

According to the packaging box 2 according to the second embodiment described above, it is possible to easily open the packaging box 2 while suppressing a decrease in the strength of the packaging box 2. The same actions and effects as in 1 can be obtained. Also, the user can cut from the side wall 11 to the upper and outer flaps 14 by simply grasping and pulling up the cut end wall 10 . Thereby, the area surrounded by the first and second breaking lines 21 and 22 can be easily removed.

As with the packaging box 1 according to the first modified example of the first embodiment described above, as the packaging box 2 according to the first modified example of the second embodiment, the pair of second breaking lines 32 It may extend along the step direction across the wall 10 and the pair of upper inner flaps 13 (not shown).

Further, in the packaging box 2 according to the second embodiment (including the first modified example), the knob portion 24A (the knob breaking line 24) is formed on the end wall 10 serving as the front surface. is not limited to For example, the knob portion 24A (the knob breaking line 24) may be formed on the side wall 11 (not shown) as in the packaging box 1 according to the first embodiment. However, in order to properly form the front opening M1 with one action, it is preferable to form the knob portion 24A on the end wall 10, which is the front surface of the packaging box 1. As shown in FIG.

[Third embodiment]
In addition, in the packaging boxes 1 and 2 according to the first and second embodiments (including each modification), the second breaking lines 22 and 32 are so-called zippers in which the cutting (breaking) direction is determined. However, the invention is not so limited. The second breaking lines 22, 32 may be any lines for breaking (cutting) the cardboard sheet. For example, as shown in FIG. 12, in the third embodiment, a second break line 42 (second side break line 42A, second top break line 42A, second top break line 42) included in an opening structure 40 for opening the packaging box 3 (peripheral wall 3W). The plane break line 42B, the terminal portion 42E) is formed by a perforation edge line in which a plurality of perforation-like (linear) cuts (cuts penetrating the corrugated cardboard sheet in the thickness direction) are arranged. In this case, it is possible to cut from the side wall 11 toward the upper outer flap 14 or from the upper outer flap 14 toward the side wall 11 . That is, the side walls 11 and the upper and outer flaps 14 can be cut from both above and below. Note that the second break line 42 can also be applied to the packaging boxes 1 and 2 according to other embodiments and modifications.

[Fourth embodiment]
In addition, in the packaging boxes 1 to 3 according to the first to third embodiments (including each modification), the first breaking line 21 on the upper side and the pair of second breaking lines 22, 32, 42 surrounded by Although the front opening M1 is formed in the range, the present invention is not limited to this. For example, as shown in FIG. 13, an opening structure 50 for opening the packaging box 4 (blank 8) according to the fourth embodiment further includes a plurality of auxiliary cut groups 53. As shown in FIG. Each auxiliary cut group 53 is a short perforating blade line in which a plurality of (approximately 4 to 6) cuts are arranged. The plurality of auxiliary cut groups 53 are arranged with gaps on a straight line passing through the terminal portions 22E of the pair of second breaking lines 22 and the upper pinch breaking line 24 . The plurality of auxiliary cut groups 53 are not connected to the second breaking line 22 or the knob breaking line 24 . Also, the plurality of auxiliary cuts 53 are formed at positions away from the first folding line L1 without crossing the first folding line L1. By intermittently forming a plurality of groups of auxiliary cuts 53 in this manner, the packaging box 4 can be easily assembled while minimizing a decrease in the strength (compressive strength, bending strength, etc.) of the walls 10 and 11. It is possible to obtain the same functions and effects as the packaging box 1 according to the above-described first embodiment, such as being able to be opened. The group of auxiliary cuts 53 can also be applied to the packaging boxes 1 to 3 according to other embodiments and modifications.

In addition, in the packaging boxes 1 to 4 according to the first to fourth embodiments (including each modification, the same shall apply hereinafter), the pair of upper and lower first breaking lines 21 are provided on the peripheral walls 1W to 3W (end wall 10, side wall 11). was formed, but the present invention is not limited to this, and one first breaking line 21 may be formed in the peripheral walls 1W to 3W (not shown).

Further, in the packaging boxes 1 to 4 according to the first to fourth embodiments, the first breaking line 21 is formed along the entire circumference of the peripheral walls 1W to 3W, but the present invention is not limited to this. If it is sufficient to form the front opening M1 without the need for the front opening M2, then one or two first breaking lines 21 should form a pair of second breaking lines forming the front opening M1. It may be formed between terminal portions 22E, 32E, 42E of lines 22, 32, 42 (not shown).

In addition, in the packaging boxes 1 to 4 according to the first to fourth embodiments, when forming the front opening M1, the end wall 10 and the side wall 11 are cut along the first breaking line 21 on the upper side. However, the invention is not so limited. For example, when forming the front opening M1, the fracture band 23 is cut (shredded) along extensions of the second fracture lines 22, 32, and 42 so that the end wall 10 and the side wall 11 are the lower first It may be cut along one break line 21 .

In addition, in the packaging boxes 1 to 4 according to the first to fourth embodiments, the second breaking lines 22, 32, 42 were formed upward from the first breaking line 21 on the upper side, but the present invention It is not limited to this. For example, the second breaking lines 22, 32, 42 may be formed upward from the first breaking line 21 on the lower side. That is, the second breaking lines 22, 32, 42 may cross the first breaking line 21 on the upper side. In this case, the lower pinch breaking line 24 is connected to the terminal portion 22E of the second breaking line 22 and the like.

In the packaging boxes 1 to 4 according to the first to fourth embodiments, the second side fracture lines 22A, 32A, and 42A of the second fracture lines 22, 32, and 42 are slightly different from the tiers of the middle core 9A. However, it is not limited to this and may be formed parallel (perpendicular) to the step of the core 9A (not shown). Further, the second top surface breaking lines 22B, 32B, 42B of the second breaking lines 22, 32, 42 are formed substantially parallel to the step of the core 9A, but this is not the only option. It may be formed diagonally with respect to the steps (not shown).

In the packaging boxes 1 to 4 according to the first to fourth embodiments, the pair of end walls 10 or the pair of side walls 11 are formed with the knob portions 24A (the knob breaking lines 24). Not limited. For example, the tab 24A (pick breaking line 24) may be formed only on one end wall 10 or one side wall 11 (at least one of the pair of end walls 10 or at least one of the pair of side walls 11). Moreover, although the pair of knob portions 24A are formed by the substantially H-shaped knob breaking lines 24, the present invention is not limited to this. For example, one knob portion 24A may be formed by the substantially U-shaped knob breaking line 24 (not shown).

Also, the packaging boxes 1 to 4 according to the first to fourth embodiments are so-called A-type corrugated cardboard boxes, but the present invention is not limited to this. The packaging boxes 1 and 2 may be of a type in which at least the top surfaces are closed by the respective flaps 13 and 14. For example, the bottom surface of the packaging box may be an American lock or the like, or may be a single plate. may be formed with

Moreover, although the packaging boxes 1 to 4 according to the first to fourth embodiments are formed of double-faced cardboard sheets made of paper, the present invention is not limited to this. For example, the corrugated cardboard sheet may be a double-faced corrugated cardboard sheet in which a single-faced corrugated cardboard sheet having a liner attached to one side of the core 9A is laminated to a double-faced corrugated cardboard sheet.

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.

1, 2, 3, 4 Packaging box 9A Medium 9B Front liner (liner)
9C back liner (liner)
10 end wall (first wall, second wall)
11 end wall (first wall, second wall)
13 Upper inner flap (inner flap)
14 Upper and outer flaps (flaps, outer flaps)
21 First breaking line 22, 32, 42 Second breaking line 23 Breaking band 24 Knob breaking line 24A Knob parts 22E, 32E, 42E End parts 25A, 26A Opening start hole 25, 26 Opening start breaking line

Claims (5)

A packaging box (1 , 3 ) formed from a corrugated cardboard sheet in which liners (9B, 9C) are attached to a medium (9A),
a first wall (10 (11));
a pair of second walls (11 (10)) connected to both ends of the first wall in the first direction;
a pair of flaps (14 (13)) connected to one end of the pair of second walls in a second direction intersecting the first direction;
a first breaking line (21) extending along the first direction across the first wall and the pair of second walls;
A pair of second breaking lines (22 , 42) extending along the second direction across the pair of second walls and the pair of flaps on the flap side of the first breaking line. and
The first breaking line is a liner cut obtained by cutting the liner (9C) inside the first wall and the pair of second walls,
The pair of second breaking lines are breaking lines in which a plurality of cuts passing through the corrugated cardboard sheet in the thickness direction are arranged at predetermined intervals ,
Each of the second break lines includes second side break lines (22A, 42A) linearly formed in the second wall and second top face break lines (22B, 42B) formed in the flap. , including
The first wall and the pair of second walls are formed with a pair of first breaking lines spaced apart in parallel in the second direction so as to form a strip-shaped breaking band (23),
At least one of the pair of second walls is formed with a grip portion (24A) for gripping the fracture band by a grip fracture line (24) penetrating the corrugated cardboard sheet in the thickness direction,
The end portions (22E, 42E) of the second side fracture line located on the side of the first fracture line are bent from the direction along the second direction to the direction along the first direction while being curved along one side of the pinch fracture line. A packaging box characterized by being a cut connected to a part . 2. The packaging box according to claim 1, wherein said pair of second breaking lines break said flap and said second wall in a direction from said flap toward said second wall. Further comprising an inner flap (13) connected to one end of the first wall in the second direction,
The flap is superimposed on the outside of the inner flap,
The flap is characterized in that an unsealing start breaking line (25) for opening an unsealing start hole (25A) for a user to insert his or her hand is formed by bending a part of the second breaking line. The packaging box according to claim 2 . Further comprising an outer flap (14) connected to one end of the first wall in the second direction,
The outer flap is superimposed on the outer side of the flap,
3. The package according to claim 2 , wherein the free end side of the outer flap is formed with an opening tear line (26) for opening an opening opening (26A) for a user to put his or her hand into. box. 2. The packaging box according to claim 1, wherein said pair of second break lines break said second wall and said flap in a direction from said second wall toward said flap.

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