JP7154909B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes.

Patent Literature 1 discloses a packaging container in which a pair of lid panels having a size such that the tips thereof contact each other when closed are continuously provided on the opposite sides of the opening of the packaging container body. A cutting line for the finger hole flap and a cutting line for the unsealing flap portion are provided in the vicinity of the cutting line of the finger hole flap at the leading end of one of the lid panels. The packaging container is sealed by covering the unsealing flap portion and applying a tape along the abutting portions of the pair of lid panels. To open the package, the user inserts his thumb into the finger hole flap to open the opening flap portion and grasps the opening edge with his hand to open the pair of lid panels.

JP-A-2000-238756

However, in the packaging container described above, the tape had to be torn in the width direction in order to open the opening flap portion. In addition, when opening the packaging container, it was possible to firmly grasp the lid panel by opening the opening flap, but the tape had to be cut along the abutting portions of the pair of lid panels, and the packaging container was removed. I wouldn't say it was easy to open.

A packaging box 100 as shown in FIGS. 19 and 20 has been proposed to solve the above problem. The packaging box 100 includes a peripheral wall 100W formed by connecting a pair of end walls 10 and a pair of side walls 11 in a rectangular tubular shape, and a pair of upper inner flaps 13 connected to upper ends of the pair of end walls 10. , a pair of upper outer flaps 14 connected to the upper ends of the pair of side walls 11; a pair of lower inner flaps 15 connected to the lower ends of the pair of end walls 10; and a pair of contiguous lower outer flaps 16 . This packaging box 100 is a so-called A-type corrugated cardboard box sealed by sticking an adhesive tape T from the butted portion of the pair of outer flaps 14, 16 to the pair of end walls 10 (see FIG. 19). One of the upper and outer flaps 14 has an opening start line 101 for opening the opening, and a pair of opening cutting lines 102 extending in the longitudinal direction from both ends of the opening start line 101 to cut the upper and outer flaps 14 . formed.

To open the packaging box 100, the user pushes the area surrounded by the opening start line 101 by hand to open the opening, and then pulls up by grasping the edge of the opening. Then, one of the upper and outer flaps 14 is cut along the pair of opening cutting lines 102 , and the cut upper and outer flaps 14 and the other upper and outer flaps 14 are attached to the pair of end walls 10 with adhesive tapes. The T is torn open.

In the packaging box 100 described above, it is not necessary to cut the adhesive tape T along the butted portions. 14 could not be opened. Therefore, a large force is required to tear off the adhesive tape T, and similarly to the packaging container described in Patent Document 1, the packaging box 100 could not be easily opened.

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

In order to achieve the above object, the packaging box of the present invention comprises a pair of end walls arranged to face each other in a first direction, and a pair of side walls arranged to face each other in a second direction intersecting the first direction. and a pair of inner flaps extending from one end of the pair of end walls so as to approach each other, and a state in which the ends of the flaps are extended from one end of the pair of side walls to approach each other and the tips are butted against each other. avoiding the pair of outer flaps superimposed on the pair of inner flaps and the adhesive tape stuck from the butted portion of the pair of outer flaps to the pair of end walls on either one of the pair of outer flaps. an unsealing start line for opening an unsealing mouth at a position; at least one unsealing cutting line extending along a first direction from one end or both ends of the unsealing start line to cut the outer flap; and each of the inner flaps. A pair of adhesive tapes connected to each other via auxiliary folding lines, separated by auxiliary cutting lines formed from both ends of each auxiliary folding line to the end wall, and to which both ends of the adhesive tape are attached and an opening aid piece, wherein the tip of one of the outer flaps cut along the opening start line and the opening cutting line is pulled up together with the other outer flap connected with the adhesive tape, The opening aid piece cut along the auxiliary cutting line is erected while being valley-folded along the auxiliary folding line, and both ends of the adhesive tape are separated from the erected pair of opening aid pieces. be torn off.

In this case, the opening assist piece has a second auxiliary folding line formed between the boundary line between the end wall and the inner flap and the auxiliary folding line. In the process of pulling up the tip portion of the outer flap and the other outer flap, it is valley-folded or mountain-folded along the auxiliary folding line and valley-folded or mountain-folded along the second auxiliary folding line By doing so, it is preferable that the sheet is erected while being valley-folded along the auxiliary folding lines after being cut along the auxiliary cutting lines.

In this case, one side of the auxiliary cutting line extending in the second direction on the end wall is inclined from one outer flap side toward the other outer flap side so as to approach the inner flap, and It is preferable that the end wall is cut from the outer flap side toward the other outer flap side.

In another case, the opening aid piece is cut along the auxiliary cutting line, and then cut along the auxiliary folding line in the process of pulling up the tip of one of the outer flaps and the other outer flap. It is preferable to stand up while being folded.

In these cases, the auxiliary folding line preferably inclines outward in the first direction from the one outer flap side toward the other outer flap side.

In this case, it is preferable that the portion of the opening aid piece formed on the inner flap is wider in the second direction than the portion formed on the end wall.

In this case, the terminating end of the unsealing cutting line is positioned closer to the center than the end in the first direction of one of the outer flaps, and is located at the pair of corners of the one of the outer flaps overlapping the pair of unsealing aid pieces. is formed with a pair of relief pieces connected to one of the outer flaps via a relief fold line, and the relief pieces are folded along the relief fold line as the opening assisting piece is raised. It is preferred to be pushed up.

In this case, it is preferable that the packaging box is formed of a corrugated cardboard sheet with a liner attached to the inner core, and the inner core of the relief piece is crushed in the thickness direction.

In this case, a pair of second relief pieces connected to the other outer flap via a second relief fold line are provided at a pair of corners of the other outer flap overlapping the pair of opening assisting pieces. is formed, and the second escape piece is pushed up while being bent along the second escape fold line as the opening assisting piece rises.

In this case, it is preferable that the packaging box is formed from a corrugated cardboard sheet with a liner attached to the inner core, and the inner core of the second release piece is crushed in the thickness direction.

In this case, the tip portions of the pair of inner flaps are spaced apart from each other, the opening start line is formed correspondingly between the pair of inner flaps, and the opening cutting line is formed along the opening start line. The opening is formed by cutting, along the opening start line, an opening piece formed in a state extending along the first direction from both ends and surrounded by the opening start line, thereby opening the packaging box. After that, the pair of inner flaps are superimposed on one of the outer flaps having the opening, and the one outer flap and the other outer flap having the opening piece are superimposed on the pair of inner flaps, The opening piece or a part of one of the outer flaps having the opening piece is inserted into an opening surrounded by the opening and the pair of inner flaps, and engages the tips of the pair of inner flaps. is preferred.

In this case, the pair of inner flaps has a pair of cut lines with which both ends in the first direction of the opening piece or both ends in the first direction of a portion of one of the outer flaps having the opening piece are engaged. is preferably formed.

According to the present invention, the packaging box can be easily opened.

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. 2 is a plan view showing an enlarged part of the blank of the packaging box according to the first embodiment of the present invention; It is a perspective view which shows the state which opened the opening in the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view showing the middle of unsealing the packaging box concerning a 1st embodiment of the present invention. FIG. 4 is a cross-sectional view of the packaging box according to the first embodiment of the present invention, showing an opening assist piece and the like in the middle of opening. 1 is a perspective view of the packaging box according to the first embodiment of the present invention, showing a state in which an opening assisting piece is raised; FIG. FIG. 2 is an enlarged perspective view of the packaging box according to the first embodiment of the present invention, showing a state in which an opening assisting piece is raised; It is a perspective view which shows the state which opened the packaging box which concerns on 1st Embodiment of this invention. FIG. 2 is a perspective view showing a resealed state of the packaging box according to 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; It is a top view which expands and shows a part of blank of the packaging box which concerns on 2nd Embodiment of this invention. FIG. 8 is a perspective view showing a state in which an opening or the like is opened in the packaging box according to the second embodiment of the present invention; It is a perspective view which shows the middle of opening the packaging box which concerns on 2nd Embodiment of this invention. FIG. 10 is an enlarged perspective view showing a packaging box according to a second embodiment of the present invention in which an opening assisting piece is raised; It is a perspective view which shows the state which opened the packaging box which concerns on 2nd Embodiment of this invention. FIG. 8 is a perspective view showing a resealed state of the packaging box according to the second embodiment of the present invention; It is a perspective view which shows the conventional packaging box. FIG. 10 is a plan view showing a blank of a conventional packaging box;

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 (second direction) is perpendicular to (crosses) the left-right direction (first direction), and the up-down 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 to 3. 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. FIG. 3 is a plan view showing an enlarged part of the blank 5. 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 paper-made double-sided cardboard sheet in which a front liner 9B and a back liner 9C (see FIG. 6) 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 core 9A of the corrugated cardboard is called the "corrugation direction", and the direction perpendicular to the corrugation direction (the core 9A) is called the "flow direction". 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, a pair of side walls 11, a passage piece 12, a pair of upper inner flaps 13 (inner flaps), and a pair of upper outer flaps 14 (outer flaps). 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.

<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 17 for easily opening the sealed packaging box 1 . The opening structure 17 includes an opening start line 20, a pair of opening cutting lines 21, a pair of opening assisting pieces 22, a pair of relief pieces 23, a pair of second relief pieces 24, and a pair of opening assistance ruled lines 25. and includes An opening line 20 , a pair of opening cutting lines 21 and a pair of relief pieces 23 are formed on one (front) upper and outer flap 14 . Each unsealing aid piece 22 is formed from the end wall 10 to the upper inner flap 13 . A pair of second relief pieces 24 and a pair of opening assisting ruled lines 25 are formed on the other (rear) upper and outer flap 14 . In the following, for convenience of explanation, one (front) upper outer flap 14 is denoted by reference numeral "F", and the other (rear) upper outer flap 14 is denoted by reference numeral "R". Descriptions common to the outer flaps 14 are given numerals.

<Opening line>
As shown in FIGS. 2 and 3, the opening start line 20 is formed near the center of the upper and outer flaps 14F in the flow direction. The opening line 20 is a zipper in which a plurality of substantially L-shaped cuts are arranged at predetermined intervals on both sides of an arc-shaped cut. The opening start line 20 is formed in a substantially fan shape (or a substantially trapezoidal shape) that widens from the distal end side of the upper and outer flap 14F toward the proximal end side (side wall 11). Both ends of the unsealing start line 20 in the flow direction are bent at an acute angle toward the tip side of the upper and outer flaps 14F. The unsealing start line 20 has a function of cutting a part of the upper and outer flaps 14F outward from the center in the flow direction.

A substantially fan-shaped (or substantially trapezoidal) opening piece 26 is formed in a range surrounded by the opening start line 20 . An opening 20A is formed in the upper and outer flap 14F by cutting the opening piece 26, which is a part of the upper and outer flap 14F, along the opening start line 20 (see FIG. 4). The opening piece 26 is connected to the tip side of the upper and outer flap 14F via an opening folding line 27 formed between both ends of the opening start line 20. As shown in FIG. The opening folding line 27 is a lead ruled line formed by forming a plurality of cuts at predetermined intervals on a general-purpose ruled line.

<Open cutting line>
A pair of opening cutting lines 21 extends outward in the flow direction (first direction) from both ends of the opening start line 20 . Each opening cutting line 21 is a zipper in which a plurality of substantially L-shaped cuts are arranged at predetermined intervals. The pair of unsealing cutting lines 21 extend from both ends of the unsealing start line 20 toward the outside in the flow direction while being slightly inclined toward the tip side of the upper outer flap 14F. In addition, the terminal ends (both end portions in the flow direction) of the pair of opening cutting lines 21 are positioned closer to the center than the end portions in the flow direction of the upper and outer flaps 14F. That is, the pair of opening cutting lines 21 do not extend to both ends of the upper and outer flaps 14F in the flow direction. Both ends of the pair of opening cut lines 21 in the flow direction are bent toward the tip side of the upper outer flap 14F. The opening cutting line 21 has a function of cutting the upper and outer flaps 14F outward from the central side in the flow direction.

<Opening aid piece>
As shown in FIGS. 2 and 3, the pair of unsealing assisting pieces 22 are formed in a range straddling the end wall 10 and the upper inner flap 13 near the center in the flow direction of the end wall 10 and the upper inner flap 13, respectively. It is As shown in FIG. 3 , the pair of opening assisting pieces 22 are connected to each of the upper inner flaps 13 via an assisting folding line 30 . The pair of opening assisting pieces 22 are separated by auxiliary cutting lines 32 formed from both ends of each auxiliary folding line 30 to the end wall 10 . Each unsealing aid piece 22 (auxiliary cutting line 32 ) is formed in a substantially rectangular shape (or substantially tongue shape) extending from the auxiliary folding line 30 on the upper inner flap 13 toward the end wall 10 . Since the pair of opening assisting pieces 22 are bilaterally symmetrical, one opening assisting piece 22 will be described below.

(Auxiliary folding line)
As shown in FIG. 3, the auxiliary folding line 30 is a lead ruled line extending substantially along the machine direction. With the packaging box 1 assembled, the auxiliary folding line 30 is inclined outward in the left-right direction (first direction) from the side of one of the upper and outer flaps 14F toward the side of the other upper and outer flap 14R (from front to rear). there is

(Second auxiliary folding line)
A second auxiliary folding line 31 is formed on the opening assisting piece 22 between the boundary line (second folding line L2) between the end wall 10 and the upper inner flap 13 and the auxiliary folding line 30 . The second auxiliary folding line 31 is formed substantially parallel to the second folding line L2 at a position away from the second folding line L2 toward the tip of the upper inner flap 13 . The length of the second auxiliary folding line 31 is shorter than the length of the auxiliary folding line 30 . The second auxiliary folding line 31 is a reverse lead ruled line in which a plurality of cuts are formed at predetermined intervals on the reverse ruled line formed by flattening the corrugated cardboard sheet straight in the thickness direction from the front liner 9B side.

In addition, a reverse ruled line L4 is formed in the same straight line as the second auxiliary folding line 31 in the entire flow direction of each upper inner flap 13 and each upper outer flap 14 (see also FIG. 2). The reason for forming the reverse creases L4 is that after the reverse creases L4 are formed in the corrugated cardboard sheet manufacturing process using a corrugator (not shown), a plurality of cuts are made using a cutter or a cutting die to form the second auxiliary folding lines 31. This is to form That is, prior to forming the second auxiliary folding line 31, the corrugator forms the reverse crease line L4 while advancing the corrugated cardboard sheet in the machine direction. In addition, the reverse ruled line L4 is also used to fold the flaps 13 and 14 outward so as not to get in the way when an article is put in and taken out of the packaging box 1. FIG. In the process of manufacturing corrugated cardboard sheets using a corrugator, the second and third folding lines L2 and L3 are also formed at the same time as the reverse ruled line L4.

(Auxiliary cutting line)
As shown in FIG. 3, the auxiliary cutting lines 32 include a pair of inclined cutting lines 32A formed between both ends of the auxiliary folding line 30 and both ends of the second auxiliary folding line 31, and a second auxiliary cutting line 32A. It includes a pair of parallel score lines 32B extending from both ends of the fold line 31 to the end wall 10, and an inclined zipper 32C formed to connect the tips of the pair of parallel score lines 32B.

The pair of inclined cut lines 32A are inclined from both ends of the auxiliary folding line 30 toward both ends of the second auxiliary folding line 31 so as to approach each other. The pair of parallel cut lines 32B extends substantially parallel to each other along the step direction from both ends of the second auxiliary folding line 31 (tips of the pair of inclined cut lines 32A). The inclined cut line 32A and the parallel cut line 32B are cut lines formed by cutting the corrugated cardboard sheet in the thickness direction so as to be continuous.

The inclined zipper 32C is a zipper in which a plurality of substantially L-shaped cuts are arranged at predetermined intervals, and constitutes one side of the auxiliary cutting line 32 extending in the flow direction (second direction) in the end wall 10 . The slanted zipper 32C is slanted (upward) so as to approach the upper inner flap 13 from the upper outer flap 14F side (from the front to the rear) toward the upper outer flap 14R side (upward) when the packaging box 1 is assembled. The slanted zipper 32C is slanted in the opposite direction to the auxiliary folding line 30 in the blank 5 state. The inclined zipper 32C is formed to cut the end wall 10 from the front to the rear (from the side of the upper outer flap 14F to the side of the upper outer flap 14R).

(Detailed shape of opening aid piece)
The opening assist piece 22 consists of a first auxiliary piece 22A connected to the upper inner flap 13 via an auxiliary folding line 30, and a second auxiliary piece 22A connected to the first auxiliary piece 22A via a second auxiliary folding line 31. 2 auxiliary pieces 22B.

The first auxiliary piece 22A is formed in a range surrounded by the auxiliary folding line 30, the second auxiliary folding line 31, and the pair of inclined cut lines 32A. The first auxiliary piece 22A is formed in a substantially trapezoidal shape narrowing from the auxiliary folding line 30 toward the second auxiliary folding line 31 . The second auxiliary piece 22B is formed in a range surrounded by the second auxiliary folding line 31, the inclined zipper 32C and the pair of parallel cut lines 32B. The second auxiliary piece 22B is formed in a substantially rectangular shape with the same width from the second auxiliary folding line 31 to the inclined zipper 32C.

The opening assisting piece 22 (second auxiliary piece 22B) is formed with a stepped crushed portion 33 (hatched in FIGS. 2 and 3) formed by crushing the core 9A in the thickness direction. The stepped portion 33 is formed in a range from the second auxiliary folding line 31 to slightly beyond the second folding line L2. Note that the step crushing portion 33 may be omitted.

<Release piece>
As shown in FIG. 3, the pair of relief pieces 23 are formed at the tip corners of the upper outer flap 14F. Each relief piece 23 is connected to the upper and outer flaps 14F via relief fold lines 35 (general-purpose ruled lines) extending in the step direction. More specifically, each release piece 23 has a release cut line 34 (zipper) from the flow direction outer end of the upper/outer flap 14F toward the inside, and the release cut line 34 from the step direction outer end of the upper/outer flap 14F. By inserting a relief fold line 35 up to the end of , it is formed in a substantially rectangular shape. A relief cut 36 extending parallel to the relief fold line 35 is formed slightly inside the center of each relief piece 23 in the flow direction. Further, the center 9A of each release piece 23 is crushed in the thickness direction (indicated by hatching in FIGS. 2 and 3).

<Second release piece>
As shown in FIG. 2, the pair of second escape pieces 24 are formed at the distal corners of the upper and outer flaps 14R. Each second relief piece 24 is connected to the upper and outer flap 14R via a second relief fold line 37 (general-purpose ruled line). Each second relief piece 24 is formed in a substantially triangular shape by forming a second relief fold line 37 obliquely from the flow direction outer end of the upper/outer flap 14R toward the step direction outer end. The center 9A of each second release piece 24 is crushed in the thickness direction (indicated by hatching in FIGS. 2 and 3).

<Opening assistance ruled line>
A pair of unsealing assistance ruled lines 25 (general-purpose ruled lines) are formed obliquely so as to approach each other from the vicinity of the base end corners of the upper and outer flaps 14R toward the tip.

[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. In addition, the end wall 10 and the side wall 11 are folded along the first folding line L1, and the passage piece 12 is adhered to the inner surface of the end wall 10 with an adhesive, and the packaging box 1 is in a folded state. Assume that there is

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 to face each other in the left-right direction, and the pair of side walls 11 are arranged to face each other in the front-rear direction.

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. In this state, the tip portions of the pair of lower inner flaps 15 are separated from each other. A pair of lower inner flaps 15 extend from the lower ends of the pair of end walls 10 so as to approach each other. The pair of lower outer flaps 16 extend from the lower end portions of the pair of side walls 11 so as to approach each other, and are overlapped on the pair of lower inner flaps 15 with their leading ends facing each other. Also, the operator sticks the adhesive tape T along the butted portions of the pair of lower outer flaps 16 . The adhesive tape T is applied from the abutted portion of the pair of lower outer flaps 16 to the lower portion of the pair of end walls 10 .

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. It should be noted that the upper flaps 13 and 14 may be folded outward along the reverse ruled line L4 when the article is put in.

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. In this state, the tip portions of the pair of upper inner flaps 13 are separated from each other. A pair of upper inner flaps 13 extend from upper ends of the pair of end walls 10 so as to approach each other. The pair of upper and outer flaps 14 are extended from the upper ends of the pair of side walls 11 so as to approach each other, and are overlapped on the pair of upper and inner flaps 13 with their tips facing each other. Also, the operator sticks the adhesive tape T along the butted portions of the pair of upper and outer flaps 14 while avoiding the unsealing start line 20 . The adhesive tape T is applied from the abutted portion of the pair of upper and outer flaps 14 to the upper portion of the pair of end walls 10 .

Specifically, the adhesive tape T is attached so as not to cover the opening start line 20 (the opening piece 26 and the opening folding line 27) but to cover both laterally outer sides of the pair of opening cutting lines 21. As shown in FIG. That is, the inside of the pair of opening cutting lines 21 continuous with the opening start line 20 is exposed without being covered with the adhesive tape T. As shown in FIG. In addition, the escape cut lines 34 of the pair of escape pieces 23 are also exposed without being covered with the adhesive tape T. Furthermore, both ends of the adhesive tape T are attached to the pair of opening aid pieces 22 (second aid piece 22B) on the pair of end walls 10 . The inclined zipper 32C is exposed without being covered with the adhesive tape T.

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). In this state, the opening start line 20 (opening piece 26 ) is formed between the pair of upper inner flaps 13 . The distal end of the opening piece 26 is formed slightly wider than the distance between the distal ends of the pair of upper inner flaps 13, and the proximal end of the opening piece 26 is formed to have substantially the same width as the distance between the distal ends of the pair of upper inner flaps 13. formed. A pair of release pieces 23 formed at a pair of corners of the upper/outer flap 14F and a pair of second release pieces 24 formed at a pair of corners of the upper/outer flap 14R (first auxiliary piece 22A).

[Opening the packaging box]
Next, a procedure for opening the packaging box 1 will be described with reference to FIGS. 4 to 9. FIG. FIG. 4 is a perspective view showing a state in which the opening 20A is opened in the packaging box 1. FIG. FIG. 5 is a perspective view showing the packaging box 1 in the middle of opening. FIG. 6 is a cross-sectional view showing the opening aid piece 22 and the like during opening of the packaging box 1. As shown in FIG. FIG. 7 is a perspective view showing a state in which the opening aid piece 22 is raised. FIG. 8 is an enlarged perspective view showing a state in which the opening assist piece 22 is raised. FIG. 9 is a perspective view showing a state in which the packaging box 1 is opened.

The packaging box 1 is opened by opening a pair of upper and outer flaps 14 using an opening structure 17 without tearing off the adhesive tape T.

As shown in FIG. 4 , the user pushes the opening piece 26 with a hand (fingers) and folds the opening piece 26 inward along the opening folding line 27 while cutting the opening piece 26 along the opening start line 20 . By pushing the opening piece 26, the opening 20A opens at a position avoiding the adhesive tape T. - 特許庁

Next, as shown in FIG. 5, the user puts his or her hand into the opening 20A, grasps the edge of the opening 20A along the opening folding line 27, and pulls up the tip of the front upper and outer flap 14F. Then, the upper and outer flaps 14</b>F are cut along the pair of opening cutting lines 21 . Further, the adhesive tape T is peeled off from the upper and outer flaps 14F on both left and right outer sides of the pair of opening cutting lines 21 . Also, the tip of the upper and outer flaps 14F is pulled up together with the rear upper and outer flaps 14R connected with the adhesive tape T. As shown in FIG. At this time, the upper and outer flaps 14R are mountain-folded along the pair of unsealing assisting ruled lines 25 and bent, so that the upper and outer flaps 14F can be easily cut along the pair of unsealing cutting lines 21. FIG.

In addition, since the tip of the upper and outer flap 14F and the upper and outer flap 14R (hereinafter also simply referred to as the "upper and outer flap 14") are connected to the pair of opening assisting pieces 22 with adhesive tape T, the upper and outer flaps 14F and 14R As the flap 14 is lifted, a lifting force is applied to the pair of opening assisting pieces 22 through the adhesive tape T. As shown in FIG. Since the action associated with pulling up the pair of unsealing assisting pieces 22 is the same, the action of one unsealing assisting piece 22 will be described below.

As shown in FIG. 6, the opening assisting piece 22 is valley-folded along the auxiliary folding line 30 in the process of pulling up the tip portion of the upper/outer flap 14F and the upper/outer flap 14R, and further along the second auxiliary folding line 31. It is mountain-folded along the Specifically, the first auxiliary piece 22A is bent upward along the auxiliary folding line 30 so as to lift the second auxiliary piece 22B. The second auxiliary piece 22B, which has been bent at the second folding line L2, is bent along the inclined zipper 32C so as to fall inward while returning to a flat state. That is, the first auxiliary piece 22A and the second auxiliary piece 22B are bent in a mountain shape with the second auxiliary folding line 31 as the apex.

At this time, the second auxiliary folding line 31 protrudes upward to push up the relief pieces 23 and the second relief pieces 24 of the pair of upper and outer flaps 14 (see FIGS. 5 and 6). Then, each relief piece 23 is cut off from the upper and outer flaps 14F at the relief cut line 34, and is bent along the relief fold line 35 or the relief cut 36 (see FIG. 5). Each second relief piece 24 is bent along a second relief fold line 37 (see FIG. 6). In this manner, each relief piece 23 and each second relief piece 24 are bent upward, thereby allowing the second auxiliary folding line 31 to protrude.

As shown in FIG. 7, when the opening aid piece 22 is pulled up further together with the upper and outer flaps 14, the second auxiliary piece 22B is cut from the end wall 10 along the slanted zipper 32C. At this time, since the auxiliary folding line 30 is inclined outward in the left-right direction from the front to the rear, the opening auxiliary piece 22 is raised while being twisted rearward. Therefore, the second auxiliary piece 22B is sequentially cut along the inclined zipper 32C from the front to the rear and obliquely upward.

Since the second auxiliary piece 22B separated from the end wall 10 is pulled up by the upper and outer flaps 14 via the adhesive tape T, the opening auxiliary piece 22 is flipped up around the auxiliary folding line 30. - 特許庁As shown in FIG. 8, in this state, the adhesive tape T attached to the second auxiliary piece 22B is directed inward, so that the adhesive tape T extending from the upper and outer flaps 14 and the surface (opposite side of the adhesive surface) They are facing each other. That is, the adhesive tape T is bent in a substantially V shape at the boundary between the portion extending from the end of the upper and outer flap 14 and the portion attached to the second auxiliary piece 22B.

Here, if the adhesive tape T extending from the upper and outer flaps 14 and the adhesive tape T attached to the second auxiliary piece 22B are on a straight line (see FIGS. 4 and 5), the upper and outer flaps 14 are pulled up. Since the force acts on the adhesive tape T in parallel with the adhesive surface, the adhesive tape T cannot be easily peeled off.

However, as shown in FIG. 8, since the adhesive tape T extending from the end of the upper and outer flaps 14 is bent at the boundary where it sticks to the second auxiliary piece 22B, the force pulling up the upper and outer flaps 14 is , in the direction crossing the adhesive surface of the adhesive tape T (the direction in which the adhesive tape T is peeled off). Therefore, as shown in FIG. 9, as the upper and outer flaps 14 are pulled up, the end of the adhesive tape T is peeled off from the raised second auxiliary piece 22B (opening auxiliary piece 22). 9, the adhesive tape T peeled off from the opening assisting piece 22 is folded back and attached to the back liner 9C of the upper and outer flaps 14. As shown in FIG.

As described above, by peeling off both ends of the adhesive tape T from the pair of opening assisting pieces 22, the packaging box 1 can be opened without tearing (cutting) the adhesive tape T at all (see FIG. 9). . The user takes out the stored articles from the unsealed packaging box 1 .

In the packaging box 1 according to the first embodiment described above, the front ends of the front upper and outer flaps 14F cut along the opening start line 20 and the opening cutting line 21 are connected by the adhesive tape T to the rear upper side. It was configured to be pulled up together with the outer flap 14R (see FIG. 5). According to this configuration, the upper and outer flaps 14 can be pulled up while the adhesive tape T is attached without cutting the adhesive tape T along the butted portions of the pair of upper and outer flaps 14 .

Further, in the packaging box 1 according to the first embodiment, the pair of opening assisting pieces 22 are connected to the upper and outer flaps 14 via the adhesive tape T, so that the opening assisting pieces cut along the auxiliary cutting lines 32 22 is raised while being bent along the auxiliary folding line 30 (see FIG. 7). In this state, the adhesive tape T extending from the ends of the upper and outer flaps 14 was bent in a substantially V shape and attached to the opening aid piece 22 (see FIG. 8). According to this configuration, the lifting force of the upper and outer flaps 14 acts in a direction intersecting the adhesive surface of the adhesive tape T, so that the lifting force can separate the adhesive tape T from the opening aid piece 22 .

As described above, when opening the packaging box 1, there is no need to cut the adhesive tape T along the butted portions of the pair of upper and outer flaps 14 or to tear off the adhesive tape T in the width direction. 1 can be opened easily.

In addition, in the packaging box 1 according to the first embodiment, the opening assisting piece 22 is valley-folded along the auxiliary folding line 30 and along the second auxiliary folding line 31 in the process of pulling up the upper and outer flaps 14 . After being cut along the auxiliary cutting line 32 (slanted zipper 32C) by being mountain-folded, it is erected while being valley-folded along the auxiliary folding line 30 (see FIG. 6). According to this configuration, the pulling up of the upper and outer flaps 14 and the cutting and raising of the unsealing assisting piece 22 can be interlocked. As a result, when the user puts his or her hand into the opening 20A, grabs the upper and outer flaps 14, and pulls them up, the opening assisting piece 22 can be automatically cut off from the end wall 10 or the like and automatically raised.

In addition, in the packaging box 1 according to the first embodiment, one side (inclined zipper 32C) of the auxiliary cutting line 32 extending in the horizontal direction on the end wall 10 is formed to be upwardly inclined from the front to the rear. It had the function of cutting the end wall 10 toward the rear (see FIG. 5, etc.). According to this configuration, the end wall 10 can be sequentially cut from the front to the rear along the inclined zipper 32C in conjunction with the pulling up of the front upper and outer flaps 14F. As a result, the end wall 10 can be cut with less force than when the end wall 10 is cut along one side of the horizontally extending auxiliary cutting line 32 at once.

Further, in the packaging box 1 according to the first embodiment, the opening assistance piece 22 is configured to rise while being twisted along the inclined auxiliary folding line 30 . According to this configuration, the opening aid piece 22 is separated from the end wall 10 and the like sequentially from the front to the rear. It is possible to reduce the force involved in raising (the force involved in cutting along the auxiliary cutting line 32).

In addition, in the packaging box 1 according to the first embodiment, the opening auxiliary piece 22 is (mainly) formed in the upper inner flap 13 rather than the portion (second auxiliary piece 22B) formed in the end wall 10 ( The first auxiliary piece 22A) was formed wider in the front-rear direction (see FIG. 3, etc.). According to this configuration, the hole formed when the opening assisting piece 22 is raised is wider on the side of the upper inner flap 13 than on the side of the end wall 10, so that the raised second auxiliary piece 22B is wider than the side of the upper inner flap. It is possible to prevent it from being caught on the edge of the hole on the 13 side (the hole opened by raising the first auxiliary piece 22A). Thereby, the opening assistance piece 22 can be raised smoothly.

In addition, according to the packaging box 1 according to the first embodiment, since the opening cutting line 21 does not extend to the end of the upper and outer flaps 14F (see FIG. 2 etc.), the adhesive tape T is pulled up when the packaging box 1 is opened. It can be peeled off from the edge of the outer flap 14F. This can prevent the adhesive tape T from being cut at the ends of the upper and outer flaps 14F. In addition, the release piece 23 formed at the corner of one of the upper and outer flaps 14 is pushed up while being folded along the release fold line 35 as the opening assisting piece 22 rises, thereby hindering the opening assisting piece 22 from rising. I have nothing to do. As a result, the opening assist piece 22 can be smoothly raised as the upper and outer flaps 14 are pulled up.

Further, according to the packaging box 1 according to the first embodiment, the second relief piece 24 formed at the corner of the rear upper and outer flap 14R folds as the opening assisting piece 22 rises. Since it is pushed up while being bent along the curve 37, the rise of the opening aid piece 22 is not hindered. As a result, the opening aid piece 22 can be smoothly raised as the upper and outer flaps 14 are pulled up.

Further, according to the packaging box 1 according to the first embodiment, the relief piece 23 and the second relief piece 24 are flattened to weaken stiffness (rigidity). It is possible to suppress the adhesive tape T from being cut at .

[Resealing the packaging box]
By the way, there are cases where it is desired to take out a part of a plurality of articles from the unsealed packaging box 1 and store the remaining articles in the packaging box 1 . This packaging box 1 has a structure for easy resealing after opening.

A procedure for resealing the opened packaging box 1 will be described with reference to FIG. FIG. 10 is a perspective view showing the packaging box 1 resealed.

With the packaging box 1 unsealed, the user folds the upper and outer flaps 14F having the opening 20A toward the inside of the peripheral wall 1W along the second folding lines L2, and then folds the pair of upper and inner flaps 13 along the second folding lines L2. to the inside of the peripheral wall 1W. Subsequently, the user folds the upper and outer flaps 14R toward the inner side of the peripheral wall 1W along the second folding line L2. In this state, the pair of upper inner flaps 13 are superimposed on the upper outer flap 14F having the opening 20A, and the upper outer flap 14F and the upper outer flap 14R having the opening piece 26 are superimposed on the pair of upper inner flaps 13. ing.

Next, the user inserts the opening piece 26 into the opening 20B surrounded by the opening 20A and the pair of upper inner flaps 13 . The unsealing pieces 26 are inserted into the openings 20B and engaged with the tip portions of the pair of upper inner flaps 13 . Specifically, the tip of the opening piece 26 is inserted into the opening 20A and contacts the back surface of the pair of upper inner flaps 13, and the root portion of the opening piece 26 (the opening start line 20 and the pair of opening cutting lines 21) ) are meshed with the tips of the pair of upper inner flaps 13 .

As described above, the unsealed packaging box 1 is easily resealed.

In the packaging box 1 according to the first embodiment described above, after opening, the cut upper and outer flaps 14 on the side of the opening 20A, the pair of upper inner flaps 13, and the remaining upper and outer flaps 14 are stacked in this order. , the unsealing piece 26 is inserted into the opening 20</b>B and engaged with the leading end of the pair of upper inner flaps 13 . According to this configuration, the packaging box 1 can be resealed using the opening 20A and the opening piece 26 that were used when the packaging box 1 was opened. Instead of the opening pieces 26, a part of the upper and outer flaps having the opening pieces 26 may be inserted into the openings 20B and engaged with the leading ends of the pair of upper and inner flaps 13 (not shown). .

In the packaging box 1 according to the first embodiment, the opening cutting line 21 does not extend to both ends of the upper and outer flaps 14F in the flow direction, but is not limited to this, and extends to both ends of the upper and outer flaps 14F in the flow direction. may

Further, in the packaging box 1 according to the first embodiment, the relief piece 23 is formed on the front upper and outer flap 14F, and the second relief piece 24 and the opening assist ruled line 25 are formed on the rear upper and outer flap 14R. However, the release piece 23, the second release piece 24 and the opening assist ruled line 25 may be omitted. In addition, although the relief piece 23 and the second relief piece 24 are flattened, the present invention is not limited to this, and they may not be flattened.

In addition, in the packaging box 1 according to the first embodiment, in the process of pulling up the upper and outer flaps 14, the opening auxiliary piece 22 is valley-folded along the auxiliary folding line 30 and mountain-folded along the second auxiliary folding line 31. , the invention is not limited thereto. Actually, it is difficult to control whether the opening assisting piece 22 is valley-folded or mountain-folded at the auxiliary folding line 30 and the second auxiliary folding line 31. It may be mountain-folded at 30 or may be valley-folded at a second auxiliary folding line 31 (not shown). That is, the opening assist piece 22 is valley-folded or mountain-folded along the auxiliary folding line 30 and valley-folded or mountain-folded along the second auxiliary folding line 31 in the process of pulling up the upper and outer flaps 14 . is cut along the auxiliary cutting line 32 at . Then, the cut opening aid piece 22 is erected while being valley-folded along the auxiliary folding line 30 .

In addition, in the packaging box 1 according to the first embodiment, in order to form the second auxiliary folding lines 31 on the opening assisting pieces 22, the reverse ruled lines L4 extend along the entire flow direction of the upper inner flaps 13 and the upper outer flaps 14. However, the present invention is not limited to this. The reverse ruled line L4 may not be formed on the entire flow direction of the upper flaps 13 and 14, and may be formed only on the opening aid piece 22. FIG.

In addition, in the packaging box 1 according to the first embodiment, the opening folding line 27 and the auxiliary folding line 30 are lead ruled lines, and the second auxiliary folding line 31 is a reverse lead ruled line, but the present invention is limited to this. not. Other folding lines such as the opening folding line 27, the auxiliary folding line 30 and the second auxiliary folding line 31 can be any lines for folding corrugated cardboard sheets, such as general-purpose creases, reverse creases, or perforating edge lines. good.

Further, in the packaging box 1 according to the first embodiment, the auxiliary folding line 30 of the opening assisting piece 22 is inclined, but this is not limiting, and the auxiliary folding line 30 may be the second folding line L2 or the second auxiliary folding line L2. It may be formed substantially parallel to the folding line 31 . Similarly, the inclined zipper 32C may be formed substantially parallel to the second folding line L2.

In addition, in the packaging box 1 according to the first embodiment, the auxiliary cutting line 32 of the opening auxiliary piece 22 is formed by continuously cut cut lines (inclined cut line 32A, parallel cut line 32B) and inclined zipper 32C. However, the invention is not limited to this. For example, all of the auxiliary cutting lines 32 may be formed of zippers.

In addition, in the packaging box 1 according to the first embodiment, the first auxiliary piece 22A is wider in the front-rear direction than the second auxiliary piece 22B. The piece 22B may be formed with substantially the same width in the front-rear direction.

[Second embodiment]
Next, the configuration of the packaging box 2 according to the second embodiment will be described with reference to FIGS. 11 to 13. FIG. 11 is a perspective view showing the packaging box 2. FIG. 12 is a plan view showing the blank 6 of the packaging box 2. FIG. FIG. 13 is a plan view showing an enlarged part of the blank 2. FIG. In addition, in the following description, the same code|symbol is attached|subjected to the structure which is the same as that of the packaging box 1 which concerns on 1st Embodiment, or respond|corresponds, and those description is abbreviate|omitted.

In the second embodiment, an opening structure 18 for opening the packaging box 2 is different from the opening structure 17 of the packaging box 1 according to the first embodiment.

[Opening structure]
As shown in FIGS. 11 and 12 , the opening structure 18 includes an opening start line 40 , a pair of opening cutting lines 41 , a pair of opening assisting pieces 42 and a pair of opening assisting ruled lines 25 . An opening start line 40 and a pair of opening cutting lines 41 are formed on the front upper and outer flaps 14F. Each unsealing aid piece 42 is formed from the end wall 10 to the upper inner flap 13 . A pair of unsealing assist ruled lines 25 are formed on the rear upper and outer flaps 14R.

<Opening line>
As shown in FIGS. 12 and 13, the opening start line 40 is a zipper formed in an arc shape near the center of the upper and outer flaps 14F in the flow direction. The opening line 40 has a function of cutting a part of the upper and outer flaps 14F outward from the center in the flow direction. By cutting the substantially crescent-shaped (or substantially semicircular) opening piece 46 surrounded by the opening start line 40 along the opening start line 40, the opening 40A is formed in the upper and outer flaps 14F (FIG. 14). reference). The opening piece 46 is connected to the leading end side of the upper and outer flap 14F via an opening folding line 47 (general-purpose ruled line) formed between both ends of the opening start line 40 . A band-shaped step crushing portion 43 extending in the step direction is formed on the leading end side of the opening folding line 47 of the upper and outer flaps 14F. The stepped portion 43 may be omitted.

<Open cutting line>
A pair of opening cutting lines 41 are zippers extending outward in the flow direction from both ends of the opening start line 40 . The inside of the pair of opening cut lines 41 in the flow direction is bent like a crank from both ends of the opening start line 40 . The pair of unsealing cutting lines 41 extends from both ends of the unsealing start line 40 to both ends of the upper outer flap 14F in the flowing direction while being slightly inclined toward the leading end side of the upper outer flap 14F. The opening cutting line 41 has a function of cutting the upper and outer flaps 14F outward from the center in the flow direction.

<Opening aid piece>
As shown in FIG. 13 , the pair of opening assisting pieces 42 are connected to each of the upper inner flaps 13 via the assisting folding lines 30 . The pair of opening assisting pieces 42 are separated by auxiliary cutting lines 52 formed from both ends of each auxiliary folding line 30 to the end wall 10 . Each opening assisting piece 42 (auxiliary cutting line 52 ) is formed in a substantially tongue shape extending from the auxiliary folding line 30 on the upper inner flap 13 toward the end wall 10 . Since the pair of opening assisting pieces 42 are bilaterally symmetrical, one opening assisting piece 42 will be described below. Moreover, the second auxiliary folding line 31 is not formed on the opening auxiliary piece 42 .

(Auxiliary cutting line)
The auxiliary cutting line 52 includes an inclined cut line 52A formed between one end (front end) of the auxiliary folding line 30 and the second folding line L2, and the other end (rear end) of the auxiliary folding line 30. and an auxiliary zipper 52B connecting the tip of the slanted score line 52A and extending to the end wall 10.

The inclined cut line 52A is a cut line that is inclined forward from the front end of the auxiliary folding line 30 . The auxiliary zipper 52B is a zipper formed in a substantially trapezoidal shape that narrows downward from the second folding line L2 in the flow direction. The auxiliary zipper 52B has the function of cutting the end wall 10 from the lower central portion toward the upper outer portion in the flow direction.

(Detailed shape of opening aid piece)
The opening assist piece 42 consists of a first auxiliary piece 42A connected to the upper inner flap 13 via an auxiliary folding line 30, and a second auxiliary piece 42A connected to the first auxiliary piece 42A via a second folding line L2. and a piece 42B.

The first auxiliary piece 42A is formed in a substantially triangular shape in a range surrounded by the auxiliary folding line 30, the second folding line L2, and the inclined cut line 52A. The second auxiliary piece 42B is formed in a substantially trapezoidal shape in a range surrounded by the second folding line L2 and the auxiliary zipper 52B.

As shown in FIGS. 12 and 13, the pair of upper inner flaps 13 are formed with a pair of cut lines 53 with which the left and right ends of a portion of the upper outer flap 14F having the opening piece 46 are engaged. It is The pair of cut lines 53 are slits that are inclined toward the upper outer flap 14F (forward) from the distal end portion of the upper inner flap 13 toward the proximal end portion. The pair of upper and inner flaps 13 are formed with a pair of rocking fold lines 54 (lead ruled lines) extending in the flow direction from the ends of the pair of cut lines 53 .

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. 14 to 17. FIG. FIG. 14 is a perspective view showing a state in which the opening 40A and the like are opened in the packaging box 2. As shown in FIG. FIG. 15 is a perspective view showing the packaging box 2 being unsealed. FIG. 16 is an enlarged perspective view showing a state in which the opening aid piece 42 of the packaging box 2 is raised. FIG. 17 is a perspective view showing a state in which the packaging box 2 is opened.

As shown in FIG. 14, the user pushes in the pair of opening auxiliary pieces 42 (second auxiliary pieces 42B) with a hand (fingers) and cuts the second auxiliary pieces 42B along the auxiliary zipper 52B to form the second folding line. Fold inward at L2. Next, the user pushes the opening piece 46 with a hand (finger) and folds the opening piece 46 inward along the opening folding line 47 while cutting the opening piece 46 along the opening start line 40 . Next, as shown in FIG. 15, the user puts his or her hand into the opening 40A created by pushing the opening piece 46, grasps the edge, and pulls up the tip of the front upper and outer flap 14F. Then, the upper and outer flaps 14</b>F are cut along the pair of opening cutting lines 41 while being mountain-folded by the step crushing portions 43 . The tip of the upper and outer flaps 14F cut along the opening cutting line 41 or the like is pulled up together with the rear upper and outer flaps 14R connected with the adhesive tape T. As shown in FIG.

Further, as shown in FIGS. 15 and 16, the opening assisting piece 42 is erected while being valley-folded along the auxiliary folding line 30 in the process of pulling up the tip portion of the upper/outer flap 14F and the upper/outer flap 14R. . Specifically, the first auxiliary piece 42A is bent upward along the auxiliary folding line 30 so as to lift the second auxiliary piece 42B, and the second auxiliary piece 42B that was bent at the second bending line L2 returns flat. while jumping up. Then, the entire unsealing aid piece 42 is raised from the auxiliary folding line 30 (see FIG. 16).

In this state, the adhesive tape T is bent in a substantially V shape at the boundary between the portion extending from the end of the upper and outer flap 14 and the portion attached to the second auxiliary piece 42B (see FIG. 16). The force for pulling up the upper and outer flaps 14 acts in a direction intersecting the adhesive surface of the adhesive tape T (the direction in which the adhesive tape T is peeled off). It is peeled off from the raised second auxiliary piece 42B (opening auxiliary piece 42) (see FIG. 17).

In the packaging box 2 according to the second embodiment described above, the auxiliary opening piece 42 is cut along the auxiliary cutting line 52 and then erected as the upper and outer flaps 14 are pulled up. According to this configuration, as the upper and outer flaps 14 are pulled up, the adhesive tape T attached to the raised opening assisting piece 42 can be peeled off, similar to the packaging box 1 according to the first embodiment. can obtain the action and effect of

[Resealing the packaging box]
Next, referring to FIG. 18, a procedure for resealing the opened packaging box 2 will be described. FIG. 18 is a perspective view showing a state in which the packaging box 2 is resealed.

Similar to resealing the packaging box 1 according to the first embodiment, the user stacks the pair of upper inner flaps 13 on the upper outer flap 14F having the opening 40A, the upper outer flap 14F having the opening piece 46 and The upper and outer flaps 14R are superimposed on the pair of upper and inner flaps 13.例文帳に追加

Next, the user inserts the opening piece 46 and a part of the upper and outer flaps 14</b>F connected thereto into the opening 40</b>B surrounded by the opening 40</b>A and the pair of upper and inner flaps 13 . Specifically, a portion of the upper and outer flaps 14F connected to the opening piece 46 enters the opening 40B while bending a portion of the pair of upper and inner flaps 13 downward along the swinging folding line 54, and enters the opening 40B. It climbs over part of 13 and touches its back. Further, both left and right ends of the upper outer flap 14</b>F connected to the opening piece 46 are bitten by the cut lines 53 formed in the pair of upper inner flaps 13 .

As described above, the unsealed packaging box 2 is easily resealed.

According to the packaging box 2 according to the second embodiment described above, the left and right ends of the upper and outer flaps 14</b>F can be securely engaged with the pair of cut lines 53 . As a result, the resealed state of the packaging box 2 can be maintained. It should be noted that the opening pieces 46 may be engaged with the pair of cut lines 53 instead of the left and right ends of the upper and outer flaps 14F. In addition, the cut line 53 is omitted from the upper inner flap 13, and the opening piece 46 or a part of the upper and outer flap having the opening piece 46 is inserted into the opening 40B in the same manner as the packaging box 1 according to the first embodiment. (not shown).

In addition, in the packaging box 2 according to the second embodiment, the opening cutting line 41 extends to both ends of the upper and outer flaps 14F in the flow direction. As with the line 21, it does not have to extend to both ends of the upper and outer flaps 14F in the flow direction.

Moreover, in the packaging box 2 according to the second embodiment, the opening folding line 47 is a general-purpose ruled line and the auxiliary folding line 30 is a lead ruled line, but the present invention is not limited to this. Each folding line such as the opening folding line 47 and the auxiliary folding line 30 may be any line for folding a corrugated cardboard sheet.

Further, in the packaging box 2 according to the second embodiment, the auxiliary folding line 30 of the opening auxiliary piece 42 is inclined, but the auxiliary folding line 30 is formed substantially parallel to the second folding line L2. may be

In addition, in the packaging box 2 according to the second embodiment, the auxiliary cutting line 52 of the opening auxiliary piece 42 is formed by continuously cut cut lines (inclined cut lines 52A) and the auxiliary zipper 52B. The invention is not so limited. For example, all of the auxiliary cutting lines 52 may be formed of zippers.

Also, in the packaging box 2 according to the second embodiment, the first auxiliary piece 42A is formed in a substantially triangular shape, but the first auxiliary piece 42A is formed in a substantially triangular shape as in the first auxiliary piece 22A of the packaging box 1 according to the first embodiment. It may be formed in a substantially trapezoidal shape wider in the front-rear direction than the second auxiliary piece 42B.

In addition, in the packaging boxes 1 and 2 according to the first and second embodiments, the pair of opening cutting lines 21 and 41 extends outward in the left-right direction from both ends of the opening start lines 20 and 40. The invention is not so limited. For example, the opening start lines 20, 40 are formed at positions shifted to the left (or right) of the upper and outer flaps 14F, and one opening cutting line 21, 41 is the right end (or left end) of the opening start lines 20, 40. (not shown) along the right (or left) direction.

Further, in the packaging boxes 1 and 2 according to the first and second embodiments, the opening structures 17 and 18 are formed on the upper flaps 13 and 14 and the like, but the present invention is not limited to this. For example, opening structures 17, 18 may be formed on each flap 13-16, etc., both on the top and bottom.

Moreover, in the packaging boxes 1 and 2 according to the first and second embodiments, the opening start lines 20 and 40, the opening cutting lines 21 and 41, and a part of the auxiliary cutting lines 32 and 52 (inclined zipper 32C, auxiliary zipper 52B) is a zipper, but these lines are not limited to this, and may be any lines for cutting corrugated cardboard sheets, such as perforation lines.

Moreover, although the packaging boxes 1 and 2 according to the first and second embodiments are so-called A-type cardboard boxes, 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 and 2 according to the first and second embodiments are formed of double-faced cardboard sheets made of paper, the present invention is not limited to this. For example, the cardboard sheet may be a single-faced cardboard sheet with a liner attached to one side of the core 9A, or may be a double-faced cardboard sheet with a single-faced cardboard sheet attached to a double-sided cardboard sheet. Further, for example, the packaging boxes 1 and 2 may be formed of thick paper, resin plates, or the like, instead of paper corrugated cardboard sheets.

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 packaging box 9A core 9B front liner (liner)
9C back liner (liner)
10 end wall 11 side wall 13 upper inner flap (inner flap)
14 Upper and outer flaps (outer flaps)
20, 40 opening start line 20A, 40A opening 20B, 40B opening 21, 41 opening cutting line 22, 42 auxiliary opening piece 23 relief piece 24 second relief piece 26, 46 opening piece 30 auxiliary folding line 31 second second Auxiliary folding lines 32, 52 Auxiliary cutting line 32C Inclined zipper (one side of the auxiliary cutting line)
35 escape fold line 37 second escape fold line 53 cut line T adhesive tape

Claims (12)

a pair of end walls (10) arranged facing each other in a first direction;
a pair of side walls (11) arranged to face each other in a second direction intersecting the first direction;
a pair of inner flaps (13) extending from one end of the pair of end walls to approach each other;
a pair of outer flaps (14) extending from one end of the pair of side walls so as to approach each other and overlapped with the pair of inner flaps with their tips facing each other;
An unsealing opening (20A, 40A) is opened in either one of the pair of outer flaps at a position avoiding the adhesive tape (T) stuck from the butted portion of the pair of outer flaps to the pair of end walls. an opening line (20, 40);
at least one opening cutting line (21, 41) extending along the first direction from one end or both ends of the opening start line to cut the outer flap;
Each of the inner flaps is connected via an auxiliary folding line (30), and is divided by auxiliary cutting lines (32, 52) formed from both ends of each of the auxiliary folding lines to the end wall. , a pair of opening aid pieces (22, 42) to which both ends of the adhesive tape are attached,
When the tip of one of the outer flaps cut along the opening start line and the opening cutting line is pulled up together with the other outer flap connected with the adhesive tape, cut along the auxiliary cutting line. The opened opening aid piece is raised while being valley-folded along the auxiliary folding line, and both ends of the adhesive tape are peeled off from the raised pair of opening aid pieces. packaging box. A second auxiliary folding line (31) is formed between the boundary line between the end wall and the inner flap and the auxiliary folding line in the opening assisting piece (22),
The opening aid piece is valley-folded or mountain-folded along the auxiliary folding line in the process of pulling up the tip of one of the outer flaps and the other outer flap, and along the second auxiliary folding line. 2. The packaging box according to claim 1, wherein the packaging box is raised while being valley-folded along the auxiliary folding lines after being cut along the auxiliary cutting lines by being valley-folded or mountain-folded. One side (32C) of the auxiliary cutting line extending in the second direction on the end wall is inclined from one outer flap side toward the other outer flap side so as to approach the inner flap, and 3. The packaging box according to claim 2, wherein said end wall is cut from said outer flap side toward said other outer flap side. After being cut along the auxiliary cutting line, the opening assisting piece (42) is valley-folded along the auxiliary folding line in the process of pulling up the tip of one of the outer flaps and the other outer flap. 2. The packaging box according to claim 1, wherein the packaging box is raised while being pushed. 5. The packaging box according to any one of claims 1 to 4, wherein the auxiliary folding lines are inclined outward in the first direction from the one outer flap side toward the other outer flap side. 6. The unsealing aid piece according to any one of claims 1 to 5, wherein the portion formed on the inner flap is wider in the second direction than the portion formed on the end wall. Packaging box as described. The terminal end of the opening cutting line is positioned closer to the center than the first direction end of one of the outer flaps,
A pair of relief pieces (23) connected to one of the outer flaps via a relief fold line (35) are formed at a pair of corners of one of the outer flaps overlapping the pair of opening assisting pieces. ,
7. The packaging box according to any one of claims 1 to 6, wherein the relief piece is pushed up while being folded along the relief fold line as the opening assisting piece rises. The packaging box is formed from a corrugated cardboard sheet in which liners (9B, 9C) are attached to a core (9A),
8. The packaging box according to claim 7, wherein the inside of the relief piece is crushed in the thickness direction. A pair of second relief pieces connected to the other outer flap via a second relief fold line (37) are provided at a pair of corners of the other outer flap overlapping the pair of opening assisting pieces. (24) is formed,
9. The packaging box according to any one of claims 1 to 8, wherein the second relief piece is pushed up while being folded along the second relief fold line as the opening assisting piece rises. . The packaging box is formed from a corrugated cardboard sheet in which liners (9B, 9C) are attached to a core (9A),
10. The packaging box according to claim 9, wherein said medium of said second relief piece is crushed in the thickness direction. The tip portions of the pair of inner flaps are separated from each other,
The opening start line is formed correspondingly between the pair of inner flaps,
The opening cutting line is formed in a state extending along the first direction from both ends of the opening start line,
The opening is formed by cutting the opening piece (26, 46) surrounded by the opening start line along the opening start line,
When resealing an opened packaging box by cutting one of the outer flaps along the opening start line and the opening cutting line, after the one outer flap having the opening is folded inward, The pair of inner flaps are folded inward to overlap one of the outer flaps having the opening, and then the other outer flap having the opening piece is connected with the adhesive tape. By bending the outer flaps of the inner flaps inward, the one outer flap having the opening piece and the other outer flap are superimposed on the pair of inner flaps, and the opening piece or one of the opening pieces having the opening piece A part of the outer flap is inserted into an opening (20B, 40B) surrounded by the opening and the pair of inner flaps, and engages with tip portions of the pair of inner flaps. 11. The packaging box according to any one of 1 to 10. The pair of inner flaps has a pair of cut lines (53) with which both ends in the first direction of the opening piece or both ends in the first direction of a portion of one of the outer flaps having the opening piece are engaged. 12. The packaging box of claim 11, wherein the packaging box is formed.

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